working machine

Abstract

In order to provide a work machine capable of expanding the space under the operator's feet, the work machine is provided with: a machine body (2); a cab (5) mounted on the machine body (2); an air conditioner main body (29) for air conditioning in the cab (5); and a prime mover room (E2) that houses a prime mover (E1) mounted on the machine body (2), the air conditioner main body (29) being disposed above the prime mover room (E2).

Description

TECHNICAL FIELD

[0001] The present application relates to a backhoe excavator or the like working machine. BACKGROUND

[0002] In the past, there have been known working machines disclosed in Patent Documents 1 to 4.

[0003] The working machine disclosed in Patent Document 1 is provided with an air conditioner main body for air conditioning in an indoor of a cab mounted on a machine body. The air conditioner main body is disposed below a driver's seat.

[0004] Further, the working machine disclosed in Patent Document 1 is provided with a turning motor that turns the machine body, on the machine body turnably supported on a traveling device.

[0005] Further, the working machine disclosed in Patent Document 1 is provided with a support stand mounted on the machine body, and a fuel tank supported on the support stand.

[0006] Further, the working machine disclosed in Patent Document 2 is provided with an exhaust gas purification device that purifies exhaust gas discharged from a prime mover, and an exhaust pipe that discharges exhaust gas discharged from the exhaust gas purification device to the outside.

[0007] Further, the working machine disclosed in Patent Document 3 is provided with a cooling fan that sends cooling air to the prime mover, and an air cleaner disposed on a downstream side of the cooling air of the prime mover. An intake hose connected to an air intake port of the air cleaner is routed from the air cleaner to a suction side of the cooling fan.

[0008] The working machine disclosed in Patent Document 4 is covered with a machine cover that covers the prime mover and a cooler disposed on a side of the prime mover, and an outside air introduction portion that introduces outside air is provided on a side of the cooler opposite to the prime mover in the machine cover. It is configured to provide a cooling fan between the prime mover and the cooler, to introduce outside air from the outside air introduction portion by suction of the cooling fan, and to flow the introduced outside air through the cooler to the prime mover.

[0009] PRIOR ART DOCUMENTS

[0010] PATENT DOCUMENTS

[0011] Patent Document 1: Japanese Patent Publication Gazette "Patent Application Publication No. 2020-2720"

[0012] Patent Document 2: Japanese Patent Publication Gazette "Patent Application Publication No. 2017-160639"

[0013] Patent Document 3: Japanese Patent Publication Gazette "Patent Application Publication No. 2013-44098"

[0014] Patent Document 4: Japanese Patent Publication Gazette "Patent Application Publication No. 2021-4482" SUMMARY

[0015] Problem to be solved by the Invention

[0016] If the air conditioner main body is disposed below the driver's seat as in the past, there is a problem that the space under the operator's feet is narrowed.

[0017] In addition, in order to perform maintenance and the like, a space is provided above the rotary electric machine, where no other devices and the like are disposed.

[0018] In addition, since the fuel tank is fixedly provided to the machine body, it is sometimes difficult to perform maintenance of the fuel tank or a device disposed in the vicinity of the fuel tank.

[0019] In the technology of Patent Document 2, if the exhaust gas discharged from the exhaust gas purification device is directly discharged to the outside of the machine body via the exhaust pipe, there is a problem that the exhaust gas at a high temperature is violently discharged, and trees are withered or exhaust noise leaked from the prime mover chamber in which the prime mover is accommodated is increased.

[0020] In the technology of Patent Document 3, there is a problem that the intake hose connected to the intake port of the air cleaner hinders the flow of cooling air flowing around the prime mover.

[0021] In addition, in the technology of Patent Document 4, there is a problem that the sound in the prime mover chamber is easily leaked to the outside from the outside air introduction portion.

[0022] In view of the above-described problems, an object of the present application is to provide a working machine capable of expanding the space under the operator's feet.

[0023] In addition, an object of the present application is to provide a working machine capable of effectively utilizing the space above the rotary electric machine.

[0024] In addition, an object of the present application is to provide a working machine capable of easily performing maintenance.

[0025] In addition, an object of the present application is to reduce the exhaust gas temperature and exhaust noise of the working machine.

[0026] In addition, an object of the present application is to improve the flow of cooling air.

[0027] In addition, an object of the present application is to suppress the sound leaked from the prime mover chamber to the outside.

[0028] Technical Solution to Solve the Problem

[0029] A working machine according to one embodiment of the present application includes a machine body, a cab mounted to the machine body, an air conditioner main body for air conditioning in the cab, and a prime mover chamber that accommodates a prime mover mounted to the machine body, the air conditioner main body being disposed above the prime mover chamber.

[0030] Further, a driver's seat is provided in an interior of the cab, and the plate member is provided in the interior of the cab at a front portion thereof, and a rear portion of the plate member protrudes rearward from a rear surface of the cab.

[0031] Further, a driver's seat is provided in an interior of the cab, and the plate member is provided in the interior of the cab at a front portion thereof, and a rear portion of the plate member protrudes rearward from a rear surface of the cab.

[0032] Further, a cooling fan that introduces air from outside the original engine room into the original engine room, a compressor that compresses refrigerant by power of the original engine, and a refrigerant piping layout path that connects the compressor are provided, and the layout path has an introduction port that communicates with an upper portion of the original engine room to introduce hot air into the original engine room, and an exhaust port that communicates with outside of the original engine room to exhaust the hot air introduced from the introduction port.

[0033] Further, a compressor arrangement portion in which the compressor is arranged is provided, and the layout path has a pair of side walls that are arranged in opposition to each other with a space in a machine body width direction, a bottom wall that closes between rear lower ends of the pair of side walls, and a cover wall that closes between upper ends and front ends of the pair of side walls, the introduction port is formed between the bottom wall and the cover wall, the exhaust port is formed at a rear portion of the cover wall, and the compressor arrangement portion is provided in communication with the introduction port on a lower side of the introduction port.

[0034] Further, the compressor arrangement portion has a main body portion that has an inspection opening that is open to a front direction and that communicates with the pair of side walls, and an open / close cover that closes the inspection opening, and the open / close cover is capable of being attached to and detached from the cover wall as a unit.

[0035] Further, a condenser that liquefies refrigerant from the compressor by radiating heat of the refrigerant, and a receiver that accumulates the refrigerant liquefied by the condenser are arranged at a side of a front portion of the cab and a front of the compressor, and the compressor, the condenser, and the receiver are capable of being detached from the machine body together with the cab.

[0036] Further, a compressor arrangement portion in which the compressor is arranged is provided, and the compressor arrangement portion is arranged on one side in the machine body width direction with respect to the cab, and the compressor is capable of being accessed from inside the cab.

[0037] Further, the machine body includes a base plate, a first longitudinal rib provided on the one side of the base plate in the machine body width direction and extending from a front portion of the base plate toward a rear portion, and a second longitudinal rib provided on the other side of the base plate in the machine body width direction and extending from the front portion of the base plate toward the rear portion. The working machine includes a hydraulic actuator driven by working oil, a working oil tank storing the working oil, a hydraulic pump that sends out the working oil from the working oil tank, a control valve that controls a flow rate of the working oil supplied from the hydraulic pump to the hydraulic actuator, and a hydraulic hose that connects the hydraulic pump and the control valve. The working oil tank is disposed at a position closer to the other side of the machine body width direction than the second longitudinal rib. The control valve is disposed at a position closer to the other side of the machine body width direction than the second longitudinal rib and closer to the front than the working oil tank. The hydraulic pump is disposed at a position closer to the rear of the machine body than a front end portion of the working oil tank. The hydraulic hose is routed between the second longitudinal rib and the working oil tank.

[0038] Further, the interior of the prime mover chamber and the cab is partitioned by a double structure of a partition wall partitioning the prime mover chamber from the outside of the prime mover chamber and an outer wall of the cab. The working oil tank constitutes a part of the partition wall.

[0039] Further, a fuel tank storing fuel for the prime mover is provided. The fuel tank is disposed above the first longitudinal rib in the machine body width direction across the first longitudinal rib.

[0040] Further, the discharge port is provided on one side in the machine body width direction. The working machine includes an air intake structure that introduces outside air from the other side in the machine body width direction.

[0041] Further, it can be that a traveling device is provided, the machine body is rotatably supported on the traveling device, a rotation motor rotates the machine body, a tank is disposed in the vicinity of the rotation motor, and a support platform supports the tank. The tank includes a tank main body and a protruding portion that protrudes from the tank main body toward an upper side of the rotation motor. The tank is movably supported on the support platform so as to retreat the protruding portion from the upper side of the rotation motor.

[0042] Further, it can be that a support platform is mounted on the machine body, and a tank is supported on the support platform so as to be movable in a horizontal direction to a set position and a pulled-out position pulled out from the set position.

[0043] Alternatively, it may include: a cooling fan that delivers cooling air toward the prime mover; an exhaust section that connects the interior of the prime mover chamber to the outside at the bottom of the body; an exhaust gas purification device that purifies the exhaust gas discharged from the prime mover; an exhaust pipe that discharges the exhaust gas discharged from the exhaust gas purification device into the interior space of the prime mover chamber; and a rectifier plate device that guides the mixture of the exhaust gas discharged from the exhaust pipe and the cooling air to the exhaust section.

[0044] Alternatively, it may include: a cooling fan that delivers cooling air toward the prime mover; an air filter disposed downstream of the cooling air relative to the prime mover; a hood that forms a prime mover chamber for housing the prime mover; an air inlet disposed on the hood on the side of the prime mover opposite to the cooling fan; and a connecting pipe that connects the air inlet to the air filter.

[0045] Alternatively, it can be configured to include: a hood that forms a prime mover chamber housing the prime mover and is closable; a cooling device having a cooling fan and a cooler disposed between the prime mover and the hood; a fixed duct that protrudes from the cooling device toward the hood; and an opening / closing duct that protrudes from the hood toward the cooling device, wherein by closing the hood, the opening / closing duct is connected to the fixed duct, and external air drawn in from outside the machine body is introduced into the cooling device via the opening / closing duct and the fixed duct.

[0046] Additionally, other embodiments of the present invention involve a work machine comprising: a traveling device; a body rotatably supported on the traveling device; a rotary motor that rotates the body; a tank disposed near the rotary motor; and a support platform that supports the tank, the tank having: a tank body; and an extension extending from the tank body toward the upper side of the rotary motor, and movably supported on the support platform to allow the extension to retract from the upper side of the rotary motor.

[0047] In addition, the protrusion extends upwards to block the motor unloading path, which is the path for the rotary motor to be unloaded from the machine body to the upper side.

[0048] Additionally, the machine body includes a cab mounted on it, with the rotary motor positioned below the cab, and a motor removal path formed between the cab and the support platform.

[0049] Additionally, the support platform has a pair of mounting portions that slidably support the can in the can movement direction, which is the direction in which the can is moved. The pair of mounting portions are arranged side by side at a distance in a horizontal direction orthogonal to the can movement direction. The can has a protrusion that extends from the can body toward the pair of mounting portions.

[0050] In addition, the device includes a mounting frame erected on the support platform and a mounting support bar disposed on the upper part of the tank. The mounting frame has a support bar mounting part that allows the mounting support bar to be detachably mounted.

[0051] Additionally, the device has a support frame for supporting the equipment mounted on the body, and the mounting frame has a frame mounting portion mounted on the support frame.

[0052] In addition, the machine body is equipped with a prime mover, and the tank is a fuel tank for storing fuel for the prime mover.

[0053] In addition, the working machine according to other aspects of the present invention includes: a body; a support platform mounted on the body; and a tank movably supported on the support platform in a horizontal direction between a set position and a pull-out position pulled out from the set position.

[0054] In addition, it is equipped with a fixing device that can fix the can in the setting position and the pull-out position.

[0055] Additionally, the fixing device includes a fixing belt device having a belt that fixes the can in the state of the set position.

[0056] Additionally, the fixing strap device includes: a locking member disposed near the lower part of the can; a fixing plate disposed on the side opposite to the locking member in a manner that clamps the can; the strap disposed from the locking member via the upper surface of the can toward the fixing plate; a strap hook disposed at one end of the strap in the length direction and hooked onto the locking member; and a strap fastener disposed at the other end of the strap in the length direction to tighten and fix the strap to the fixing plate.

[0057] Additionally, the fixing device includes: a locking portion disposed on the support platform; and a first locking portion and a second locking portion, which are separately disposed on the can in the direction of movement of the can. The first locking portion engages with the locking portion when the can is in the set position, thereby restricting the movement of the can in the pull-out direction from the set position to the pull-out position and in the push-in direction from the pull-out position to the set position. The second locking portion engages with the locking portion when the can is in the pull-out position, thereby restricting the movement of the can in the pull-out direction and the push-in direction.

[0058] Additionally, the engaging portion is a roller on the support platform that holds the can, and the first engaging portion and the second engaging portion are recesses formed on the bottom surface of the can for the roller to be inserted into.

[0059] Furthermore, the first engaging portion has: a first limiting surface that abuts against the engaging portion on the front side in the pull-out direction to restrict the movement of the can in the push-in direction when the can is in the set position; and a first guiding surface that abuts against the engaging portion on the rear side in the pull-out direction to restrict the movement of the can in the pull-out direction when the can is in the set position, and is formed in an inclined shape as it moves downward from the top of the recess towards the push-in direction. The second engaging portion has: a second limiting surface that abuts against the engaging portion on the front side in the push-in direction to restrict the movement of the can in the pull-out direction when the can is in the pull-out position; and a second guiding surface that abuts against the engaging portion on the rear side in the push-in direction to restrict the movement of the can in the push-in direction when the can is in the pull-out position, and is formed in an inclined shape as it moves downward from the top of the recess towards the pull-out direction.

[0060] Additionally, the fixing device includes: a support member that is integrally and movably disposed on the can; a first fixing part and a second fixing part that are separately disposed on the side of the machine body along the moving direction of the can; and a first fixing member that fixes the support member to the first fixing part when the can is in the set position and fixes the support member to the second fixing part when the can is in the pulled-out position.

[0061] Additionally, the fixing device includes: a third fixing part and a fourth fixing part, which are separately provided on the body side in the direction of movement of the can; a second fixing member, which fixes the support member to the third fixing part when the can is in the set position; and a third fixing member, which fixes the support member to the fourth fixing part when the can is in the set position, the fourth fixing part being disposed relative to the third fixing part in the pull-out direction from the set position toward the pull-out position, and fixing the support member to the fourth fixing part by the third fixing member when the can is in the pull-out position.

[0062] In addition, the can has a can body and a protrusion that extends downward from the bottom of the can body.

[0063] In addition, the machine body is equipped with a prime mover, and the tank is a fuel tank for storing fuel for the prime mover.

[0064] Additionally, another aspect of the present invention relates to a working machine comprising: a body; a prime mover mounted on the body; a prime mover chamber housing the prime mover; a cooling fan supplying cooling air toward the prime mover; an exhaust section communicating with the interior and exterior of the prime mover chamber at the bottom of the body; an exhaust gas purification device purifying exhaust gas discharged from the prime mover; an exhaust pipe discharging exhaust gas from the exhaust gas purification device into the interior space of the prime mover chamber; and a rectifier plate device guiding a mixture of exhaust gas from the exhaust pipe and the cooling air to the exhaust section.

[0065] Additionally, the rectifier plate device has a cylindrical rectifier plate body that draws in the mixed gas from the exhaust pipe side and discharges it near the exhaust section.

[0066] In addition, the cooling fan delivers the cooling air from one side to the other in the width direction of the body. The main body of the rectifier plate is formed in an inclined shape that moves downward from the exhaust pipe side to the discharge section side as it moves toward the other side. It has an inlet opening on the exhaust pipe side that opens toward one side to take in the cooling air. The outlet of the exhaust gas from the exhaust pipe is located near the inlet opening or inside the cylindrical rectifier plate main body.

[0067] In addition, the exhaust pipe is configured to blow the exhaust gas toward the inner surface of the rectifier plate body.

[0068] Additionally, the body has a counterweight constituting the rear of the body, the discharge section includes a first discharge section formed in the counterweight, and the rectifier plate device has a guide plate extending from the rectifier plate body toward the first discharge section to guide the mixed gas discharged from the rectifier plate body to the first discharge section.

[0069] Additionally, the machine body has a base plate on which the prime mover is mounted, the discharge section includes a second discharge section formed on the base plate, and the rectifier plate device has an extension plate extending from the rectifier plate body above the second discharge section to guide the mixed gas discharged from the rectifier plate body to the second discharge section.

[0070] In addition, the cooling fan delivers the cooling air from one side of the body width direction to the other side. The rectifier plate body has a first structure and a second structure connected to the other side of the first structure, and has a gap provided at the connection between the first structure and the second structure to draw the cooling air from the outside of the first structure into the interior of the second structure.

[0071] In addition, another aspect of the present invention relates to a working machine comprising: a body; a prime mover mounted on the body; a cooling fan that delivers cooling air toward the prime mover; an air filter disposed downstream of the cooling air relative to the prime mover; a shroud that forms a prime mover chamber for housing the prime mover; an air inlet disposed on the shroud on the side of the prime mover opposite to the cooling fan; and a connecting pipe connecting the air inlet and the air filter.

[0072] In addition, the air inlet section includes an air inlet box, which forms an air intake chamber for taking in air from outside the hood, and the connecting pipe is connected to the air inlet box.

[0073] In addition, the air inlet has an air inlet for drawing air from outside the hood into the air intake chamber, and the connecting pipe has an intake port for drawing air from the air intake chamber into the connecting pipe. The intake port is located in the air intake chamber at a position offset horizontally or upward from the air inlet.

[0074] Additionally, the connecting pipe has an insertion portion that is inserted into the air intake chamber. The insertion portion is offset from the air intake inlet in the horizontal or upward direction, and the suction port is formed on the wall of the insertion portion on the side opposite to the air intake inlet side.

[0075] Additionally, the insertion portion is offset from the air intake inlet in the horizontal direction, the suction port penetrates the wall portion and is formed from the lower end of the wall portion upwards, the insertion portion has a lower wall forming the lower surface of the internal space of the insertion portion, and the lower wall has a cut that communicates with the lower end of the suction port.

[0076] In addition, the air inlet box has an opening facing the side of the hood and communicating with the air intake, and the opening edge forming the opening is fixed to the inner surface of the hood.

[0077] Additionally, the air intake box has a bottom wall forming the lower surface of the air intake chamber, the bottom wall having: a first edge forming the opening edge; and a second edge opposite to the first edge and formed in an inclined shape that moves downward from the second edge toward the first edge, the hood having a drain portion that allows water transferred on the bottom wall to pass to the outside of the hood.

[0078] Additionally, the shroud has: an opening that is opposite to the opening and has an opening edge fixed around it; and a plate member that is configured to cover the opening from the outside and has the air intake formed thereon, the drainage portion being formed by a gap formed between the lower edge of the plate member and the surrounding wall portion around the opening.

[0079] Additionally, the connecting pipe has: a first pipe member connected to the air inlet; a second pipe member connected to the air filter; and a third pipe member formed by an elastic member connecting the first pipe member and the second pipe member.

[0080] Additionally, another aspect of the present invention relates to a machine comprising: a body; a prime mover mounted on the body; a hood forming a prime mover chamber for housing the prime mover and configured to be openable and closable; a cooling device having a cooler and a cooling fan disposed between the prime mover and the hood; a fixed pipe disposed on the hood side of the cooling device; and an opening / closing pipe disposed on the cooling device side of the hood, wherein by closing the hood, the opening / closing pipe is connected to the fixed pipe, and external air drawn in from outside the body is introduced into the cooling device via the opening / closing pipe and the fixed pipe.

[0081] Additionally, the hood has: a side wall portion disposed to the side of the cooling device; and an upper wall portion connected to the upper part of the side wall portion. An external air inlet portion is formed on the upper wall portion above the fixed pipe, for drawing in external air from outside the machine body into the opening and closing pipe. The opening and closing pipe extends throughout the side wall portion and the upper wall portion. The external air drawn in from the external air inlet portion is guided downward along the side wall portion and then flows into the fixed pipe connected to the inside of the opening and closing pipe in the width direction of the machine body.

[0082] In addition, the opening and closing pipe is formed by the side wall portion and the upper wall portion and a partition member disposed on the inside side of the machine body relative to the side wall portion and the upper wall portion, the partition member having an opening formed at a position corresponding to the cooling device to allow external air to flow into the fixed pipe.

[0083] Additionally, it has a sealing material that seals the connection between the opening / closing pipe and the fixed pipe when the hood is closed.

[0084] In addition, near the connection between the fixed pipe and the open / closed pipe, a dustproof net is provided to capture dust contained in the outside air flowing from the open / closed pipe to the fixed pipe.

[0085] In addition, the dustproof net can be loaded and unloaded relative to the fixed pipe or the open / closed pipe by opening the machine cover.

[0086] Invention Effects

[0087] According to the aforementioned work machine, by placing the air conditioning unit above the prime mover compartment, the operator's foot space can be increased compared to placing the air conditioning unit below the driver's seat.

[0088] Furthermore, according to the aforementioned work machine, by providing an extension on the tank that extends upwards towards the rotary motor, the tank's capacity can be increased by effectively utilizing the space above the rotary motor. Additionally, by moving the tank to retract the extension from above the rotary motor, the maintainability of the rotary motor can be ensured.

[0089] Furthermore, according to the aforementioned work machine, by pulling the tank out of its setting position, maintenance of the tank or the device located near the tank can be easily performed, thereby improving maintainability.

[0090] Furthermore, according to the aforementioned machine, by discharging the exhaust gas from the exhaust gas purification device into the prime mover chamber, the exhaust gas is mixed with cooling air in the prime mover chamber and then discharged to the outside, thereby reducing exhaust temperature and exhaust noise.

[0091] Furthermore, according to the aforementioned machine, since the air inlet is located on the side of the prime mover opposite to the cooling fan in the machine cover, and the air inlet is connected to the air filter via a connecting pipe, the path relative to the air intake side of the air filter will not obstruct the flow of cooling air around the prime mover, thereby improving the flow of cooling air.

[0092] Furthermore, according to the aforementioned machine, since a pipe structure is formed between the machine cover and the cooling device, it is possible to suppress the sound leakage from the prime mover compartment to the outside. Attached Figure Description

[0093] Figure 1 This is a schematic side view showing the overall structure of the machine involved in one embodiment.

[0094] Figure 2 This is a schematic top view of the machine involved in one embodiment.

[0095] Figure 3 It is a 3D view of the rotating frame.

[0096] Figure 4A It is a three-dimensional diagram of the organism.

[0097] Figure 4B It is a three-dimensional diagram of the organism.

[0098] Figure 4C It is a three-dimensional diagram of the organism.

[0099] Figure 5 This is a right-side view of the aircraft and the cockpit.

[0100] Figure 6 This is a 3D view of the aircraft and cockpit from the right rear.

[0101] Figure 7 This is a three-dimensional view of the aircraft and cockpit from the left rear.

[0102] Figure 8 This is a 3D view of the aircraft and cockpit from the right rear.

[0103] Figure 9 This is a front sectional view showing the configuration of the fuel tank and rotary motor.

[0104] Figure 10 It is a 3D view of the driver's cab and the slewing frame.

[0105] Figure 11 It is a 3D diagram showing the configuration of the fuel tank and rotary motor.

[0106] Figure 12 It is a three-dimensional view of the support platform, mounting frame, and support frame.

[0107] Figure 13 It is a three-dimensional diagram showing the structure of the support platform.

[0108] Figure 14 It is a three-dimensional diagram showing the structure of the support platform.

[0109] Figure 15 This is a right-side view of the fuel tank and support platform.

[0110] Figure 16 This is the main view showing the removal of the rotary motor.

[0111] Figure 17 It is a three-dimensional diagram showing the supporting structure of the fuel tank.

[0112] Figure 18 This is a rear view showing the relationship between the fuel tank and the hose.

[0113] Figure 19 It is a side sectional view of the driver's cab and the prime mover's compartment.

[0114] Figure 20 This is a 3D view of the main body of the air conditioner.

[0115] Figure 21 This is a three-dimensional view of the piping structure, compressor, condenser, etc., viewed from the rear.

[0116] Figure 22 This is a three-dimensional view of the piping structure and condenser from the rear.

[0117] Figure 23A It is a 3D diagram of the partition wall.

[0118] Figure 23B It is a 3D diagram of the partition wall.

[0119] Figure 24 It is a 3D diagram of the partition wall.

[0120] Figure 25 It is a 3D view of the partition wall with the cover wall removed.

[0121] Figure 26 It is a three-dimensional view of the cover wall.

[0122] Figure 27 It is a cross-sectional view showing the structure of the pipeline.

[0123] Figure 28 It is a three-dimensional diagram showing the layout of the refrigerant piping.

[0124] Figure 29 It is a three-dimensional diagram showing the layout of the refrigerant piping.

[0125] Figure 30 It is a three-dimensional diagram showing the layout of refrigerant piping and heat medium piping.

[0126] Figure 31 It is a 3D view of the cab, compressor, condenser, and liquid receiver.

[0127] Figure 32 It is a three-dimensional diagram showing the intake and exhaust structures.

[0128] Figure 33 It is a diagram showing the intake and exhaust structures.

[0129] Figure 34 This is a planar sectional view of the air intake structure.

[0130] Figure 35 This is a schematic side view showing the overall structure of the work machine involved in other embodiments.

[0131] Figure 36 This is a schematic top view of the machine involved in other embodiments.

[0132] Figure 37 It is a 3D view of the rotating frame.

[0133] Figure 38 It is a three-dimensional diagram of the organism.

[0134] Figure 39This is a perspective view showing the fuel tank configuration on the rotary frame.

[0135] Figure 40 This is a 3D view of the fuel tank configuration section.

[0136] Figure 41 This is the main view of the fuel tank in its set position.

[0137] Figure 42 This is a rear view of the fuel tank in its set position.

[0138] Figure 43 This is a right-side view of the fuel tank in its set position.

[0139] Figure 44 This is the front view of the fuel tank in the pulled-out position.

[0140] Figure 45 It is a three-dimensional view of the support platform and the components supporting the fuel tank.

[0141] Figure 46 It is a three-dimensional view of the support platform, etc.

[0142] Figure 47 This is an exploded perspective view of the support platform.

[0143] Figure 48 This is a right-side view of the fuel tank and support platform.

[0144] Figure 49 This is a three-dimensional view of the right side of the support platform.

[0145] Figure 50 This is an exploded perspective view of the right side of the support platform.

[0146] Figure 51 This is the front view showing the second fixing device.

[0147] Figure 52 This is an exploded perspective view showing the third and fourth fixing devices.

[0148] Figure 53 This is a right-side view showing the upper support structure of the fuel tank.

[0149] Figure 54 This is a three-dimensional view of the back of the support frame.

[0150] Figure 55 This is a schematic cross-sectional view of the rear of the air intake structure, representing the cooling airflow.

[0151] Figure 56 It is a three-dimensional diagram showing the state of an open or closed pipe.

[0152] Figure 57It is a three-dimensional diagram showing the inside of an open and closed pipe.

[0153] Figure 58A It is an exploded 3D diagram of an opening and closing pipe.

[0154] Figure 58B It is a three-dimensional diagram showing the relationship between the main body of the partition component and the sealing material.

[0155] Figure 59 This is an exploded 3D view of the frame.

[0156] Figure 60 It is a three-dimensional view showing the inner side of the separating component.

[0157] Figure 61 This is a three-dimensional view showing the outer side of the partition component.

[0158] Figure 62 It is a planar sectional view of the configuration of radiators, etc., and the opening and closing pipes.

[0159] Figure 63 It is a rear sectional view of the configuration parts such as radiators and the opening and closing pipes.

[0160] Figure 64 This is an exploded 3D view of the frame.

[0161] Figure 65 This is a three-dimensional view of the lower outer side of the frame.

[0162] Figure 66 This is a 3D exploded view of the insect-proof net.

[0163] Figure 67 It is a 3D view of the fixed pipeline configuration side.

[0164] Figure 68 It is a 3D view of the fan cover, heat sink, and mounting pipes.

[0165] Figure 69 It is a 3D view of the installation frame and fixed pipes.

[0166] Figure 70 It is a 3D diagram of a fixed pipeline.

[0167] Figure 71 It is a three-dimensional view showing the sealing part between the fixed pipe and the outer wall.

[0168] Figure 72 It is a planar sectional view of the location of the bracket component.

[0169] Figure 73 It is a three-dimensional diagram showing the sealing structure of open and closed pipes and fixed pipes.

[0170] Figure 74It is a three-dimensional diagram showing the sealing structure of open and closed pipes and fixed pipes.

[0171] Figure 75 This is a top view showing the configuration of the equipment in the prime mover compartment.

[0172] Figure 76 It is a 3D diagram showing the air filter and its inlet path.

[0173] Figure 77 It is an exploded 3D view of the air filter and its inlet path.

[0174] Figure 78 It is a planar sectional view of the entrance path.

[0175] Figure 79 This is a planar sectional view of the air intake section of the inlet path.

[0176] Figure 80 This is a 3D view of the air inlet box.

[0177] Figure 81 This is a side sectional view of the air intake section of the inlet path.

[0178] Figure 82 This is a side sectional view of the air inlet section.

[0179] Figure 83 This is a 3D view of the air filter installation section.

[0180] Figure 84 This is a three-dimensional view of the intake structure observed from inside the prime mover compartment.

[0181] Figure 85 It is a 3D diagram of the air intake structure.

[0182] Figure 86 This is a three-dimensional view of the rectifier plate assembly.

[0183] Figure 87 This is an exploded perspective view of the rectifier plate assembly.

[0184] Figure 88 This is a rear view of the rectifier assembly.

[0185] Figure 89 This is a cross-sectional view of the rear of the rectifier assembly.

[0186] Figure 90 This is a top view that omits some components of the rectifier assembly.

[0187] Figure 91 This is a three-dimensional diagram of the first structure.

[0188] Figure 92 This is a three-dimensional diagram of the first structure.

[0189] Figure 93 This is a three-dimensional diagram of the second structure.

[0190] Figure 94 This is a three-dimensional diagram of the second structure.

[0191] Figure 95 This is a three-dimensional diagram of the second structure. Detailed Implementation

[0192] Hereinafter, embodiments of the present invention will be described with appropriate reference to the accompanying drawings.

[0193] Figures 1-34 This indicates one implementation method. Figure 1 This is a schematic side view showing the overall structure of the work machine 1 according to one embodiment. Figure 2 This is a schematic top view of the work machine 1. In this embodiment, the work machine 1 is exemplified as a backhoe excavator, which is a rotary work machine.

[0194] like Figure 1 , Figure 2 As shown, the work machine 1 includes a body (turntable) 2, a traveling device 3, and a working device 4. A driver's cab 5 is mounted on the body 2. Inside the driver's cab 5 is a driver's seat 6 for the operator (driver). That is, the driver's seat 6 is surrounded by the driver's cab 5. The driver's seat 6 has a seat 6A for the operator to sit on and a backrest 6B for supporting the operator's back.

[0195] In this embodiment, the direction will be towards the front of the operator seat 6 of the machine 1. Figure 1 , Figure 2 The direction of arrow A1 is called the front (front of the machine), and it will be directed towards the rear of the operator. Figure 1 , Figure 2 The direction of arrow A2) is referred to as the rear (rear of the aircraft). Additionally, Figure 1 , Figure 2 The direction of arrow K1 is called the front-back direction. Additionally, the direction towards the operator's left (…) Figure 1 The inside, Figure 2 The direction of arrow B1 is called the left, and it will point towards the operator's right ( Figure 1 The near anterior side, Figure 2 The direction of arrow B2 is called the right side.

[0196] Additionally, the horizontal direction, which is orthogonal to the front-back direction (front-back direction of the fuselage) K1, is taken as the width direction of the fuselage K2 (refer to...). Figure 2The following explanation will be provided. The direction from the center of the body 2 in the width direction toward the right or left will be defined as the outer direction in the width direction. That is, the outer direction in the width direction is the direction moving away from the center of the body 2 in the width direction toward the body width direction K2. The direction opposite to the outer direction in the width direction will be defined as the inner direction in the width direction. That is, the inner direction in the width direction is the direction along the body width direction K2 closest to the center of the body 2 in the width direction.

[0197] Furthermore, in this embodiment, the structure (cabin specification) in which the driver's seat 6 is arranged inside the cab 5 is described, but it is not limited to this. It may also be a structure in which the driver's seat 6 is open to the outside in the front-rear direction K1 and the width direction K2 of the fuselage, and is covered by a canopy (top cover) above (top cover specification). It may also be a structure in which the driver's seat 6 is open to the outside in the front-rear direction K1, the width direction K2 of the fuselage, and above.

[0198] like Figure 1 , Figure 2 As shown, the traveling device 3 is a tracked traveling device that supports the machine body 2 in a drivable manner. It has a traveling frame 3A, a first traveling device 3L located on the left side of the traveling frame 3A, and a second traveling device 3R located on the right side of the traveling frame 3A. The first traveling device 3L and the second traveling device 3R are driven by a traveling motor M1, which is composed of a hydraulic motor (hydraulic actuator). In this embodiment, a tracked traveling device 3 is used, but it is not limited to this; a wheeled or other type of traveling device may also be used. A bulldozing device 7 is installed at the front of the traveling device 3.

[0199] like Figure 1 As shown, the main body 2 is supported on the traveling device 3 by a slewing bearing 8 in a manner that allows it to rotate about a slewing axis X1 extending in the vertical direction. Figure 2 As shown, the cockpit 5 is located on the left and front of the fuselage 2.

[0200] like Figure 1 As shown, the machine body 2 has a support bracket 9 for supporting the working device 4 and a swing bracket 10 at the front. The support bracket 9 is provided in a protruding manner from the front of the machine body 2. The swing bracket 10 is mounted at the front of the support bracket 9 in a manner that allows it to swing about a longitudinal axis (an axis extending in the vertical direction).

[0201] like Figure 1As shown, the working device 4 includes a boom 11, a stick 12, and a bucket 13. The base of the boom 11 is pivotally mounted on the upper part of the swing bracket 10 so as to be able to rotate about a horizontal axis (an axis extending along the width direction K2 of the machine body). The stick 12 is pivotally mounted on the front end side of the boom 11 so as to be able to rotate about a horizontal axis. The bucket 13 is provided on the front end side of the stick 12 so as to be able to perform digging and unloading operations. The digging operation refers to the operation of swinging the bucket 13 toward the boom 11, for example, when digging up soil or sand. The unloading operation refers to the operation of swinging the bucket 13 away from the boom 11, for example, when dropping (discharging) the dug-up soil or sand.

[0202] The work machine 1 can replace the bucket 13 or, based on the bucket 13, can be equipped with other work tools (hydraulic attachments) that can be driven by a hydraulic actuator. Examples of other work tools include hydraulic breakers, hydraulic crushers, angled brooms, grounding augers, pallet forks, sweepers, lawnmowers, snowplows, etc.

[0203] The swing bracket 10 can swing by the extension and retraction of the swing cylinder C1. The boom 11 can swing by the extension and retraction of the boom cylinder C2. The stick 12 can swing by the extension and retraction of the stick cylinder C3. The bucket 13 can perform digging and dumping actions by the extension and retraction of the bucket cylinder C4. The swing cylinder C1, boom cylinder C2, stick cylinder C3, and bucket cylinder C4 are composed of hydraulic cylinders (hydraulic actuators).

[0204] Next, refer to Figure 2 The configuration structure of the main equipment mounted on the work machine 1 will be briefly described.

[0205] like Figure 2 As shown, a prime mover E1 is mounted at the rear of the machine body 2 (see reference). Figure 5 The prime mover E1 is a diesel engine. Alternatively, the prime mover E1 can be a gasoline engine, an electric motor, or a hybrid type with both an engine and an electric motor. A cooling fan 14 is mounted on the right side of the prime mover E1. Driven by the prime mover E1, the cooling fan 14 generates cooling air flowing from right to left, i.e., from the outside of the engine body 2 towards the prime mover E1. Specifically, the cooling fan 14 is an intake fan that draws in air (external air) from the right side of the engine body 2 and directs it towards the prime mover E1.

[0206] To the right of the cooling fan 14 are arranged a radiator 15, an oil cooler 16, and a fuel cooler 17. The radiator 15 cools the coolant that cools the prime mover E1. The oil cooler 16 cools the returning working oil from hydraulic actuators such as hydraulic cylinders and hydraulic motors. The fuel cooler 17 cools the fuel. These coolers are cooled by the cooling air drawn in by the cooling fan 14.

[0207] A compressor 18 driven by the prime mover E1 is located at the front right side of the prime mover E1. The compressor 18 is a device that forms part of the air conditioning system (air conditioner) equipped on the work machine 1, and compresses the refrigerant (air conditioning gas) to form a semi-liquid.

[0208] A fuel tank 19 is located in front of the compressor 18, radiator 15, and oil cooler 16. The fuel tank 19 stores fuel for the prime mover E1. A rotary motor 20 (see reference) is located on the lower left side of the fuel tank 19. Figure 5 The rotary motor 20 is composed of a hydraulic motor (hydraulic actuator). The rotary motor 20 is a (rotationally driven) motor that causes the machine body 2 to rotate around the rotation axis X1. A rotary joint 21 is located at the rotation axis X1. The rotary joint 21 is a rotary joint that supplies and discharges working oil between the hydraulic actuator on the traveling device 3 side and the control valve V1 on the machine body 2 side. The left side of the fuel tank 19, the rotary motor 20, and the rotary joint 21 are located below the cab 5.

[0209] A battery 22 is disposed in front of the fuel tank 19. The battery 22 supplies power to the electrical components equipped on the work machine 1. A condenser 23 and a receiver 24, which form part of the air conditioning system, are disposed in front of the battery 22. The condenser 23 is a device that dissipates heat from the refrigerant from the compressor 18 and liquefies it. Specifically, it is a cooler that liquefies the refrigerant that has been formed into a semi-liquid state by the compressor 18. In this embodiment, the condenser 23 is an electric condenser cooled by an electric fan. The receiver 24 is a device that stores the refrigerant liquefied by the condenser 23, and is a device that separates the refrigerant that has not been liquefied by the condenser 23 from the liquefied refrigerant and removes moisture and impurities.

[0210] A hydraulic pump 25 is installed on one side (left side) of the prime mover E1. The hydraulic pump 25 is driven by the power of the prime mover E1. The hydraulic pump 25 discharges working oil (pressure oil) that drives the hydraulic actuators such as hydraulic motors and hydraulic cylinders equipped on the working machine 1. In addition, the hydraulic pump 25 discharges pilot pressure and signal hydraulic pressure to operate hydraulic valves.

[0211] To the left of the prime mover E1 are arranged an exhaust gas purification device 26, an air filter 27, and a working oil tank 28. The exhaust gas purification device 26 purifies the exhaust gas discharged from the prime mover E1; for example, it is a DPF (Diesel Particulate Filter). The air filter 27 purifies the air supplied to the prime mover E1. The working oil tank 28 stores working oil. The exhaust gas purification device 26 and the air filter 27 are positioned above the hydraulic pump 25, with the air filter 27 positioned to the left of the exhaust gas purification device 26. The working oil tank 28 is positioned below the driver's seat 6. Working oil is supplied from the working oil tank 28 to the hydraulic pump 25.

[0212] A control valve V1 is disposed in front of the working oil tank 28. The control valve V1 controls the flow rate of working oil supplied from the hydraulic pump 25 to the hydraulic actuators equipped on the working machine 1 and driven by the working oil. In detail, the control valve V1 is a valve unit that integrates various control valves that control the flow rate of working oil supplied to each hydraulic actuator equipped on the working machine 1. The control valve V1 is disposed below the step portion 84a described later.

[0213] The working oil tank 28 and the control valve V1 are located on the same side as the hydraulic pump 25 in the machine body 2. By arranging the hydraulic pump 25, the working oil tank 28, and the control valve V1 on one side (left side) of the machine body 2, the routing path of the hydraulic hoses between the hydraulic pump 25, the working oil tank 28, and the control valve V1 can be simplified.

[0214] Above the prime mover E1, hydraulic pump 25, and exhaust gas purification device 26, an air conditioning unit 29 for regulating the air inside the cab 5 is installed (see reference). Figure 5 The air conditioning unit 29 is the main component of the air conditioning system, comprising a housing and an expansion valve, evaporator, blower, etc., housed within the housing. In the air conditioning unit 29, refrigerant from the receiver 24 is injected through the expansion valve into the evaporator and vaporizes. The vaporized refrigerant cools the evaporator, causing the blower to pass through it to generate cold air. The refrigerant exiting the evaporator returns to the compressor 18. Furthermore, the heating system of the air conditioning system utilizes the heat from the prime mover E1.

[0215] like Figure 3As shown, the body 2 has a rotating frame 30 that serves as its skeleton. This rotating frame 30 includes a rotating base plate (base plate) 31 forming the bottom of the body 2, reinforcing ribs 32 reinforcing the rotating base plate 31, the aforementioned support bracket 9, and a counterweight 33. Furthermore, the rotating frame 30 has brackets, support bars, etc., for mounting equipment, tanks, other components, etc., mounted on the body 2. The rotating base plate 31 is formed from a thick steel plate or the like. The brackets, support bars, etc., mounted on the rotating frame 30 are fixed to the rotating base plate 31 by welding. The rotating base plate 31 is supported on the traveling device 3 via a rotating bearing 8 in a manner that allows it to rotate freely around the rotation axis X1.

[0216] Reinforcing ribs 32 are disposed on the rotating base plate 31 from front to rear. The reinforcing ribs 32 are formed of sheet metal and are erected longitudinally (with the thickness direction aligned with the horizontal direction) on the rotating base plate 31 and fixed to the rotating base plate 31 by welding. Specifically, the reinforcing ribs 32 include: a first longitudinal rib 32R, disposed on one side (right side) of the rotating base plate 31 in the width direction K2 and extending from the front to the rear of the rotating base plate 31; and a second longitudinal rib 32L, disposed on the other side (left side) of the rotating base plate 31 in the width direction K2 and extending from the front to the rear of the rotating base plate 31.

[0217] like Figure 4A , Figure 4B , Figure 4C As shown, the working oil tank 28 is located on the opposite side (left side) of the second longitudinal rib 32L in the width direction K2 of the machine body. The control valve V1 is located on the opposite side (left side) of the second longitudinal rib 32L in the width direction K2 of the machine body and is located in front of the working oil tank 28. The hydraulic pump 25 is located on the rear side of the machine body, above the front end of the working oil tank 28. In addition, the delivery hose (hydraulic hose) 114 connecting the hydraulic pump 25 and the control valve V1 is laid between the second longitudinal rib 32L and the working oil tank 28.

[0218] This allows for improved maintainability of the suction filter (not shown) and return filter 115 installed in the working oil tank 28, and avoidance of noise caused by interference between the delivery hose (hydraulic hose) 114 and the outer packaging.

[0219] A return filter 115 is provided at the front of the working oil tank 28. The return filter 115 and the control valve V1 are connected by a return hose (hydraulic hose) 116.

[0220] The support bracket 9 consists of a pair of upper and lower plates, fixed to the front of the reinforcing rib 32. The counterweight 33 is installed at the rear of the rotating base plate 31.

[0221] A partition 34 is fixed at the midpoint of the rotary base plate 31 in the front-rear direction. The partition 34 extends longitudinally in the width direction K2 of the machine body and passes through the first longitudinal rib 32R and the second longitudinal rib 32L. A prime mover E1 is mounted between the partition 34 and the counterweight 33. The front end of the working oil tank 28 is arranged on the left side of the partition 34. The rear of the working oil tank 28 and the hydraulic pump 25 are arranged further rearward than the partition 34.

[0222] A reinforcing plate 35 is fixed to the front of the partition plate 34 and on the first longitudinal rib 32R and the second longitudinal rib 32L, extending rearward from the upper plate 9A that forms the upper part of the support bracket 9.

[0223] like Figure 3 , Figure 4B , Figure 4C As shown, mounting portions 36 are provided on the front left side of the rotating base plate 31 and the front of the reinforcing plate 35. On the left side of the counterweight 33, a pair of left and right support portions 37 are provided protruding upwards.

[0224] like Figure 4A As shown, a pad frame member 38 for vibration damping support of the front of the cab 5 is installed on the mounting section 36. On the left and right supports 37 of the counterweight 33, a thick plate member 39 (see reference) is used. Figure 19 A shielding plate 40 is installed, and a pad frame component 41 for vibration damping support of the rear of the cab 5 is installed on the shielding plate 40.

[0225] like Figure 4A As shown, the left and right sides and the front surface of the rotating frame 30 are covered by the rotating cover 42. The control valve V1 is housed inside the body 2 and can be inspected / maintained by removing the rotating cover 42.

[0226] like Figure 2 , Figures 5-7 As shown, the machine body 2 has a cover device 43 that covers the equipment, components, and parts mounted on the rotating frame 30. The cover device 43 is composed of multiple covers. The multiple covers include a first cover 43A to a ninth cover 43I and a pipe structure 45. The first cover 43A is located on the front right side of the machine body 2 and covers the condenser 23 and the liquid reservoir 24. The first cover 43A is removable, allowing for inspection / maintenance of the condenser 23 and the liquid reservoir 24. The second cover 43B is located behind the first cover 43A and covers the fuel tank 19 and the battery 22. Figure 5 As shown, the rear of the second cover 43B is pivotally supported by a hinge and opens upwards. Opening the second cover 43B allows for fuel supply to the fuel tank 19 and for inspection / maintenance of the fuel tank 19 and battery 22. The third cover 43C covers the right side of the fuel tank 19 and battery 22. Figure 2As shown, the rear of the third cover 43C is pivotally supported by a hinge and opens to the rear, allowing for inspection / maintenance of the fuel tank 19 and battery 22. Furthermore, the third cover 43C is not limited to a hinged pivot support structure; for example, it can also be a bolt-mounted structure. The fourth cover 43D covers the radiator 15, oil cooler 16, and fuel cooler 17 from the right side to the rear. The fourth cover 43D has an opening 44 for drawing in outside air via the cooling fan 14. Figure 8 As shown, the front of the fourth cover 43D is supported by a hinge pivot and opens forward. By opening the fourth cover 43D, the radiator 15, oil cooler 16, and fuel cooler 17 can be inspected / maintained. The fifth cover 43E covers the top of the cooling fan 14. The sixth cover 43F and the seventh cover 43G cover the rear of the prime mover E1. The sixth cover 43F has a first portion 43Fa located above the seventh cover 43G, and a second portion 43Fb located to the left of the seventh cover 43G. Figure 8 As shown, the upper part of the seventh cover 43G is supported by a hinge pivot and opens upwards. Alternatively, the seventh cover 43G can also be configured such that the left or right side is supported by a hinge pivot and opens to the left or right. The eighth cover 43H covers the upper part of the working oil tank 28 and the left side of the air filter 27. Figure 7 As shown, the rear of the eighth cover 43H is supported by a hinge pivot and opens to the rear. By opening the eighth cover 43H, the working oil tank 28, air filter 27, and hydraulic pump 25 can be inspected / maintained. The ninth cover 43I is located below the eighth cover 43H and covers the lower part of the working oil tank 28. The pipe structure 45 is located to the left of the fifth cover 43E, covering the top of the prime mover E1, and exhausts the hot air above the prime mover E1 to the outside of the cover assembly 43.

[0227] like Figure 7 As shown, an opening / closing cover 42A is provided on the left side of the rotating cover 42. The upper part of the opening / closing cover 42A is supported by a hinge pivot and opens upwards. By opening the opening / closing cover 42A, the control valve V1 can be accessed.

[0228] like Figure 4A , Figure 9 As shown, the rotary motor 20 is positioned in front of the partition 34 and close to the first longitudinal rib 32R between the first longitudinal rib 32R and the second longitudinal rib 32L. The fuel tank 19 is positioned above the first longitudinal rib 32R (reinforcing rib 32) and extends from the right end of the body 2 (to the right of the first longitudinal rib 32R) across the width direction K2 of the body and toward the upper side of the rotary motor 20.

[0229] like Figure 9As shown, the rotary motor 20 is mounted on the rotary base plate 31. The rotary motor 20 is located below the cab 5. At the lower part of the rotary motor 20, a rotary pinion 47 is mounted, which is driven about a longitudinal axis by the power of the rotary motor 20. The rotary pinion 47 is located below the rotary base plate 31 and engages with the rotary bearing 8. Specifically, the rotary bearing 8 has an outer ring mounted on the body 2, an inner ring rotatably disposed on the inner circumference of the outer ring about the rotary axis X1, and an inner ring with an internal gear formed on the inner circumference. The rotary pinion 47 meshes with the internal gear. Furthermore, the rotary pinion 47 is driven by the rotary motor 20 to move along the internal gear, thereby causing the body 2 to rotate about the rotary axis X1.

[0230] like Figure 9 As shown, the fuel tank 19 is positioned near the rotary motor 20. Specifically, it is positioned to the right of the rotary motor 20. The fuel tank 19 includes: a tank body 19A, positioned to the right of the rotary motor 20; a protrusion 19B extending to the left from the tank body 19A and extending upwards towards the rotary motor 20; and a protrusion 19C protruding downwards from the tank body 19A. The protrusion 19C is formed such that it extends along the width direction K2 of the machine body at the center of the tank body 19A in the front-rear direction (see reference). Figure 15 The lower surface of the can body 19A and the front and rear of the protrusion 19C are formed as a mounting lower surface 48 for the mounting portion 55c described later. The pair of mounting lower surfaces 48 are formed as flat surfaces in the width direction K2 of the body.

[0231] In the fuel tank 19 of this embodiment, the capacity of the fuel tank 19 can be increased by providing the extension 19B and the protrusion 19C.

[0232] like Figure 9 , Figure 10 As shown, the cab 5 has lower side panels 49 at its lower part. The lower side panels 49 are located on the lower left and lower right sides of the cab 5. The left and right lower side panels 49, together with the front pillar 50 and the rear pillar 51, form the cab frame, which constitutes the skeleton of the cab 5. On the lower side of the lower side panels 49, a cutout 49a is formed to avoid interference with the protrusion 19B of the fuel tank 19.

[0233] like Figure 11 As shown, the protrusion 19B is inserted into the lower side of the cab 5 via the cutout 49a. The fuel tank 19 is supported on a support platform 52 mounted on the slewing frame 30. Furthermore, to allow the protrusion 19B to retract from the upper side of the slewing motor 20, the fuel tank 19 is movably supported on the support platform 52. In this embodiment, the fuel tank 19 can be inserted from... Figure 9 The indicated setting position is moved to the outside (right) of the body width direction K2.

[0234] like Figure 12As shown, the support platform 52 has a first side plate 53, a second side plate 54, and an upper plate 55.

[0235] like Figure 12 , Figure 13 As shown, the first side plate 53 has a front upper edge 53a, a longitudinal edge 53b extending downward from the front upper edge 53a, and a rear upper edge 53c extending rearward from the lower end of the longitudinal edge 53b. Additionally, the first side plate 53 has a mounting piece 53d formed at the lower part of the front portion. Figure 13 As shown, the mounting piece 53d is bolted to the nut component 56 fixed on the reinforcing plate 35.

[0236] like Figure 14 , Figure 15 As shown, the second side plate 54 has a front upper edge 54a, a longitudinal edge 54b extending downward from the front upper edge 54a, a rear first upper edge 54c extending rearward from the longitudinal edge 54b, a rear second upper edge 54d spaced apart from the rear of the rear first upper edge 54c, and a downwardly recessed flange portion 54e disposed between the rear first upper edge 54c and the rear second upper edge 54d. The flange portion 54e is configured to have: a first flange portion 54e1 extending downward from the rear end of the rear first upper edge 54c; a second flange portion 54e2 extending downward from the front end of the rear second upper edge 54d; and a third flange portion 54e3 connecting the lower ends of the first flange portion 54e1 and the second flange portion 54e2 to each other. The second side plate 54 has a mounting piece 54f at the lower part of the front. The mounting piece 54f is mounted to the rotating base plate 31 by bolts.

[0237] like Figures 2-15 As shown, the upper plate 55 is fixed to the first side plate 53 and the second side plate 54. The upper plate 55 has a battery mounting wall 55a, a hanging wall 55b, a pair of mounting portions 55c, and a connecting wall 55d.

[0238] A battery mounting wall 55a is provided between the front upper edges 53a and 54a of the first side plate 53 and the second side plate 54. A battery 22 (see reference) is mounted and installed on the battery mounting wall 55a. Figure 4A ).

[0239] The hanging wall 55b extends downward from the rear edge of the battery mounting wall 55a and is disposed between the longitudinal edges 53b and 54b of the first side plate 53 and the second side plate 54.

[0240] One (front) mounting portion 55c of a pair extends rearward from the lower edge of the hanging wall 55b, and is disposed between the rear upper edge 53c of the first side plate 53 and the rear first upper edge 54c of the second side plate 54. The other (rear) mounting portion 55c is spaced apart behind the one mounting portion 55c and is disposed across the rear upper edge 53c of the first side plate 53 and the rear second upper edge 54d of the second side plate 54. A mounting piece 55e is formed on the rear right side of the other mounting portion 55c. The mounting piece 55e is fixed to the support plate 57 provided on the rotating frame 30 by bolts. In addition, an extension piece 55f extending rearward is formed to the left of the mounting piece 55e on the other mounting portion 55c. The pair of mounting portions 55c protrude to the right from the second side plate 54.

[0241] like Figure 15 As shown, a lower mounting surface 48 of the fuel canister 19 is mounted on a pair of mounting portions 55c in a manner that allows it to move (slide) along the width direction K2 of the fuselage. That is, the support platform 52 has a pair of mounting portions 55c that can slidably support the fuel canister 19 in the direction in which it moves, i.e., the canister movement direction 58. These two mounting portions 55c are arranged side-by-side at a distance from each other in a horizontal direction orthogonal to the canister movement direction 58. In this embodiment, the lower mounting surface 48 is mounted on the mounting portion 55c via a lowering member 59 provided on the upper surface of the mounting portion 55c. The lowering member 59 is formed, for example, of a member with low frictional resistance or a cushioning member. Alternatively, the lowering member 59 may also be formed of a member with low frictional resistance and a cushioning effect.

[0242] like Figure 15 As shown, the protrusion 19C protrudes between a pair of mounting portions 55c and is located within the recessed edge portion 54e.

[0243] like Figure 13 As shown, the connecting wall 55 connects the left ends of a pair of mounting portions 55c to each other. The protrusion 19C is located on the right side of the connecting wall 55d. The rear part of the connecting wall 55d is mounted on and supported by a block member 60 fixed to the reinforcing plate 35.

[0244] like Figure 16 As shown, the fuel tank 19 can move on the support platform 52 along the tank movement direction 58 (body width direction K2), by moving the fuel tank 19 from... Figure 9The shown mounting position is moved to the right, causing the protrusion 19B to retract from above the rotary motor 20. This allows access to the rotary motor 20 for maintenance. Furthermore, a motor removal path 61, serving as a path for removing the rotary motor 20, is provided between the cab 5 and the support platform 52. Therefore, by moving the fuel tank 19, the protrusion 19B retracts from above the rotary motor 20, and also retracts from the motor removal path 61. By retracting the protrusion 19B from the motor removal path 61, the rotary motor 20 can be removed upwards via the motor removal path 61. In other words, the protrusion 19B extends upwards, blocking the path 61 from which the rotary motor 20 is removed upwards from the body 2. In other words, the motor removal path 61, used for removing the rotary motor 20, is used to position the fuel tank 19.

[0245] As described above, in this embodiment, by moving the fuel tank 19 so that the extension 19B moves away from the upper side of the rotary motor 20, maintenance and removal of the rotary motor 20 can be ensured. Therefore, by providing the extension 19B extending to the upper side of the rotary motor 20 in the fuel tank 19, the capacity can be increased and the space above the rotary motor 20 can be effectively utilized.

[0246] Furthermore, the motor removal path 61 for removing the rotary motor 20 is formed between the cab 5 and the support platform 52, so the rotary motor 20 can be removed without removing the cab 5 from the machine body 2. In addition, the rotary motor 20 can be removed without removing the cab 5 from the machine body 2, so the cab 5 can be securely installed on the machine body 2.

[0247] In addition, in this embodiment, the support platform 52 is formed by combining the tank support platform that supports the fuel tank 19 and the battery support platform that supports the battery 22, but the tank support platform and the battery support platform can also be formed separately.

[0248] like Figure 17 As shown, the fuel tank 19 has a mounting support 63 mounted on a mounting frame 62 erected on a support platform 52. By mounting the mounting support 63 onto the mounting frame 62, the movement of the fuel tank 19 in the tank movement direction 58 can be restricted.

[0249] like Figure 12 , Figure 17 As shown, the mounting support 63 has a lower wall 63a and a longitudinal wall 63b extending upward from the rear of the lower wall 63a. The lower wall 63a is fixed to the mounting member 64, which is mounted on the mounting portion 65 located on the upper part of the fuel tank 19.

[0250] like Figure 12 , Figure 17As shown, the mounting frame 62 includes: a support member 62A that is erected on the extension piece 55f of the mounting portion 55c; and a support rod mounting portion 62B and a frame mounting portion 62C fixed to the upper part of the support member 62A. The support rod mounting portion 62B is fixed to the front surface side of the upper part of the support member 62A. By mounting the support rod 63 on the support rod mounting portion 62B with bolts or the like, the movement of the fuel tank 19 in the tank movement direction 58 can be restricted. In addition, by releasing the fixation of the support rod 63 relative to the support rod mounting portion 62B, the movement of the fuel tank 19 in the tank movement direction 58 can be allowed. The frame mounting portion 62C is fixed to the upper end of the support member 62A on the rear side of the support rod mounting portion 62B. By opening the second cover 43B, the fixation of the support rod 63 relative to the support rod mounting portion 62B can be released. In addition, by opening the second cover 43B and the third cover 43C (or by removing them), the fuel tank 19 can be moved to the right.

[0251] like Figure 4A , Figure 17 As shown, the mounting frame 62 is mounted on the support frame 66 that supports the equipment mounted on the body 2. This ensures adequate support for the mounting frame 62, thereby adequately restricting and supporting the movement of the fuel tank 19.

[0252] The support frame 66 has a door-shaped main frame 67 and a sub-frame 68 that reinforces the main frame 67. For example, a radiator 15 and a fan shroud surrounding the cooling fan 14 are mounted and supported on the main frame 67. The main frame 67 has: a rear support column 67A, which is mounted at its lower part on a mounting portion 69 provided on a counterweight 33 and erected on the mounting portion 69; a front support column 67B, which is mounted at its lower part on a mounting portion 70 fixed to a partition 34 and erected on the mounting portion 70; and a connecting portion 67C connecting the rear support column 67A and the front support column 67B. A mounting piece 71 of the mounting frame mounting portion 62C is fixed to the upper part of the front support column 67B.

[0253] The subframe 68 is formed of rods or plates and has: a support column 68A, the lower part of which is mounted on a support plate 57 fixed to the partition plate 34 and erected on the support plate 57; and a cross member 68B, which extends to the left from the upper end of the support column 68A and is fixed to the upper part of the front support column 67B at its left end. The mounting plate 71 is also fixed to the cross member 68B.

[0254] like Figure 18As shown by the imaginary lines, the hose 73 connected to the fuel tank 19 is formed to a sufficient length to allow the fuel tank 19 to move in the tank movement direction 58. Examples of hoses 73 connected to the fuel tank 19 include a delivery hose 73A for supplying fuel from the fuel supply pump 72 to the fuel tank 19, a fuel pipe 73B connecting the fuel filter 100 and the fuel tank 19, a return hose 73C for allowing fuel to flow back to the fuel tank 19, and a discharge pipe 73D for discharging fuel from the fuel tank 19.

[0255] like Figure 5 , Figure 19 As shown, the air conditioning unit 29 is mounted at the rear of the cab 5. Furthermore, the air conditioning unit 29 is positioned behind the driver's seat 6, specifically behind the backrest 6B of the driver's seat 6. The front of the air conditioning unit 29 is located inside the cab 5, and the rear protrudes rearward from the back of the cab 5. The portion of the air conditioning unit 29 protruding from the cab 5 is covered by an air conditioning cover 46. By allowing the air conditioning unit 29 to protrude from the cab 5, the possibility of the air conditioning unit 29 narrowing the interior space of the cab 5 can be prevented.

[0256] like Figure 8 As shown, the air conditioning cover 46 has an openable and closable cover 46A. The upper front side of the openable and closable cover 46A is supported on the cab 5 via a hinge pivot and opens upwards. By opening the openable and closable cover 46A, maintenance such as the air conditioning unit 29 can be performed.

[0257] like Figure 19 As shown, the air conditioning unit 29 is positioned above the prime mover compartment (engine compartment) E2, which houses the prime mover E1. By positioning the air conditioning unit 29, which was previously located below the driver's seat 6, above the prime mover compartment E2, the foot space for the operator can be increased.

[0258] like Figure 2 , Figure 19 , Figure 27 As shown, the prime mover compartment E2 is composed of a partition wall 74 that separates the prime mover E1 from the driver's seat 6, a partition 34, a rotating base plate 31, a counterweight 33, a sixth cover 43F to a ninth cover 43I, a shielding plate 40, etc.

[0259] like Figure 19As shown, the cab 5 has a panel member 75 located behind the driver's seat 6. Specifically, the panel member 75 is located at the lower rear of the backrest 6B of the driver's seat 6. The front of the panel member 75 is disposed within the interior of the cab 5, and the rear protrudes rearward from the rear of the cab 5. The panel member 75 is connected to the rear of the left and right lower side panels 49. The rear of a floor panel (outer wall of the cab 5) 84, forming the bottom side of the interior of the cab 5, is connected to the panel member 75. The floor panel 84 has: a step portion 84a for placing the operator's feet; a seat platform portion 84b located behind the step portion 84a for mounting the driver's seat 6; an inclined wall portion 84c that slopes upward from the seat platform portion 84b towards the rear; and a connecting wall portion 84d extending rearward from the upper rear portion of the inclined wall portion 84c and connecting to the panel member 75.

[0260] like Figure 19 As shown, the floor panel 84 and the partition wall 74 are spaced apart. That is, the interior of the prime mover compartment E2 and the driver's cab 5 are separated by a double structure of the partition wall 74, which separates the prime mover compartment E2 from its exterior, and the outer wall (floor panel 84) of the driver's cab 5. In addition, the plate member 75 is arranged above the prime mover compartment E2, spaced apart from the prime mover compartment E2, and is supported on the body 2 by the anti-vibration support member 41. The air conditioning unit 29 is mounted on the plate member 75. The plate member 75 is formed of a thick plate and is arranged spaced apart from the prime mover compartment E2 to form an air layer (heat insulation layer) between it and the prime mover compartment E2, thus greatly suppressing the heat transfer from the prime mover compartment E2 (prime mover E1) to the air conditioning unit 29.

[0261] In addition, by setting the air conditioning unit 29 on the plate member 75 of the pad frame member 41 at the rear of the cab 5 where the vibration damping support is installed, the components can be reused and the structure of the air conditioning unit 29 can be made more compact.

[0262] like Figure 20 As shown, a filter device 77 is provided at the rear of the air conditioner body 29. An air intake 29A for drawing in air is provided on the left side of the air conditioner body 29, and an air exhaust 29B for discharging air is provided on the right side of the air conditioner body 29.

[0263] like Figure 19 As shown, the filter device 77 and the air intake 29A are connected by an air intake pipe 78, and outside air is drawn into the air conditioning unit 29 through the filter device 77. A supply pipe 79 is connected to the exhaust 29B, from which air conditioning air is supplied to the cab 5.

[0264] like Figure 2 As shown, the pipe structure 45 that discharges the hot air from the prime mover chamber E2 to the outside is located on the right side of the prime mover chamber E2 (to the right of the prime mover E1).

[0265] like Figure 23A , Figure 24 As shown, the pipe structure 45 forms part of the partition wall 74 that constitutes the prime mover chamber E2. Specifically, the partition wall 74 has: a main wall portion 80 constituting the left side of the partition wall 74; a fan shroud wall portion 81 constituting the right side of the partition wall 74; a pipe structure 45 disposed between the main wall portion 80 and the fan shroud wall portion 81; a first connecting wall portion 82 connecting the lower portions of the main wall portion 80 and the fan shroud wall portion 81 to each other; and a second connecting wall portion 83 connecting the rear portions of the main wall portion 80 and the fan shroud wall portion 81 to each other.

[0266] like Figure 19 As shown, the main wall portion 80 includes: an upper wall 80A covering the upper part of the prime mover E1; and a front wall 80B covering the front of the prime mover E1. Figure 19 As shown, the upper wall 80A is connected to the shielding plate 40.

[0267] like Figure 23A , Figure 24 As shown, a cutout 117 is formed on the left side of the front wall 80B. The cutout 117 is formed as a cutout opening to the left and downward from an upper edge 117a extending along the width direction K2 of the fuselage and a longitudinal edge 117b extending downward from the right end of the upper edge 117a. (See diagram below.) Figure 23B As shown, the front of the working oil tank 28 is configured to close the cut-out portion 117. A sealing member 118 is installed across the upper edge 117a and the longitudinal edge 117b of the cut-out portion 117, and this sealing member 118 abuts against the working oil tank 28, thereby sealing the working oil tank 28 and the cut-out portion 117. Therefore, the working oil tank 28 constitutes part of the partition wall 74 that separates the prime mover compartment E2 from the exterior (driver's seat 6 side) of the prime mover compartment E2.

[0268] like Figure 21 , Figure 22 As shown, the fan shroud 81 has: an upper wall 81A covering the top of the cooling fan 14; and a front wall 81B covering the front of the cooling fan 14. Figure 23A , Figure 24 As shown, the first connecting wall portion 82 connects the lower part of the front wall 80B of the main wall portion 80 and the front wall 81B of the fan shroud wall portion 81 to each other. Figure 24 As shown, the second connecting wall portion 83 connects the rear portion of the upper wall 80A of the main wall portion 80 and the rear portion of the upper wall 81A of the fan shroud wall portion 81 to each other. Figure 27 As shown, the lower part of the front wall 80B of the main wall portion 80, the lower part of the front wall 81B of the fan shroud wall portion 81, and the first connecting wall portion 82 are mounted on the partition 34. Figure 23A , Figure 27As shown, an abutment plate 85 is provided across the lower part of the front wall of the main wall portion 80, the lower part of the first connecting wall portion 82, and the lower part of the front wall 81B of the fan shroud portion 81, and is positioned by abutting against the upper end of the partition plate 34.

[0269] like Figure 23A , Figure 24 , Figure 25 As shown, the pipe structure 45 has a pair of side walls 86, a bottom wall 87, and a shroud 88. The pair of side walls 86 are arranged opposite each other at a distance from each other in the width direction K2 of the casing. One side wall 86L is connected to the right end of the main wall portion 80. The other side wall 86R is connected to the left end of the fan shroud portion 81. The pair of side walls 86 are open to the rear, front, top, and bottom. Figure 27 As shown, the bottom wall 87 is located above the prime mover E1. Furthermore, the bottom wall 87 extends rearward from the second connecting wall portion 83 and spans across the lower rear ends of a pair of side walls 86, thereby closing the lower rear ends of the pair of side walls 86. Therefore, the front side between the lower ends of the pair of side walls 86 is open, while the rear side is closed by the bottom wall 87. The front side between the lower ends of the pair of side walls 86, i.e., the front end of the bottom wall 87, and the cover wall 88 located in front of the front end of the bottom wall 87 form an inlet 89 for introducing hot air into the prime mover chamber E2, communicating with the upper part of the prime mover chamber E2.

[0270] like Figure 23A As shown, the cover wall 88 encloses the space between the upper ends and the front ends of a pair of side walls 86. Specifically, the cover wall 88 has: an upper wall 88a extending from the rear end to the lower front end between the pair of side walls 86; a side wall 88b extending from the left end of the upper wall 88a and detachably mounted to one side wall 86L; and another side wall 88c extending from the right end of the upper wall 88a and detachably mounted to the other side wall 86R. Additionally, as... Figure 26 , Figure 27 As shown, a sealing wall 90 and an outlet 91 are provided on the rear end side of the enclosure wall 88. The sealing wall 90 closes the lower part of the rear end opening between a pair of side walls 86. The outlet 91 is a part that communicates with the outside of the prime mover chamber E2 to discharge hot air introduced from the inlet 89, and is located above the sealing wall 90.

[0271] Air drawn into the prime mover compartment E2 by cooling fan 14 Figure 27 As shown by the middle arrow, the hot air, together with the hot air in the upper part of the prime mover chamber E2, is introduced into the pipe structure 45 through the inlet 89. The introduced hot air flows backward in the pipe structure 45 and is discharged to the outside of the prime mover chamber E2 through the outlet 91.

[0272] like Figure 27 As shown, the compressor 18 is positioned at the front of the upper right side of the prime mover E1 and below the inlet 89. Figure 21As shown, the compressor 18 is driven by the power transmitted from the prime mover E1 via the drive belt 92, and, as Figure 27 As shown, the first support bar 93 and the second support bar 94 are mounted on the prime mover E1 in a manner that allows for adjustment of the tension of the transmission belt 92.

[0273] like Figure 27 As shown, a compressor mounting section 95 for mounting the compressor 18 is provided on the lower side of the front portion of the pipe structure 45. The compressor mounting section 95 is positioned on the right side (one side) of the machine body width direction K2 relative to the cab 5. In addition, the compressor mounting section 95 is provided below the inlet 89 and communicates with the inlet 89.

[0274] like Figure 23A , Figure 25 As shown, the compressor configuration unit 95 includes: a main body portion 95A having an access opening 95a; and an opening / closing cover 95B that closes the access opening 95a.

[0275] like Figure 25 As shown, the main body 95A is formed by recessing the plate forming the partition wall 74 from the rear to the front. The access opening 95a opens forward and communicates between a pair of side walls 86.

[0276] like Figure 23A As shown, the opening / closing cover 95B is integrally formed on the lower front part of the cover wall 88 of the pipe structure 45. That is, the opening / closing cover 95B can be installed and removed integrally with the cover wall 88.

[0277] like Figure 28 As shown, by removing the hood 95B together with the hood wall 88, the compressor 18 can be accessed through the access opening 95a and between a pair of side walls 86. Therefore, when the hood wall 88 is removed together with the hood 95B, the tension of the drive belt 92 that transmits power to the compressor 18 can be adjusted. Additionally, the compressor 18 can be removed. Furthermore, the compressor 18 can be accessed from inside the cab 5. Specifically, as... Figure 1 As shown, an opening / closing window 5A is provided on the right side (one side) of the cab 5, and a compressor mounting unit 95 is located on the right side (one side) of the cab 5. Therefore, when the second cover 43B is opened and the opening / closing cover 95B and cover wall 88 are removed, and the opening / closing window 5A is opened, the compressor 18 can be accessed from inside the cab 5. This improves the maintainability of the compressor 18, the adjustment of the drive belt 92, and other maintenance tasks.

[0278] like Figure 27As shown, within the pipe structure 45, a refrigerant pipe 96 connected to the compressor 18 and a heat medium pipe 97 for heating the air conditioning system, extending from the prime mover E1 to the air conditioning unit 29, are arranged. That is, the interior of the pipe structure 45 is formed as a path 98 for arranging the refrigerant pipe 96 and the heat medium pipe 97. In other words, the pipe structure 45 forms the path 98, which is used to discharge hot air from the upper part of the prime mover compartment E2. Therefore, the path 98 has: an inlet 89, which communicates with the upper part of the prime mover compartment E2 to introduce hot air into the prime mover compartment E2; and an outlet 91, which communicates with the outside of the prime mover compartment E2 to discharge the hot air introduced from the inlet 89.

[0279] In this embodiment, by forming the refrigerant pipeline 96 and the heat medium pipeline 97 by the pipeline structure 45, and the exhaust path for the hot gas to be discharged from the prime mover chamber E2, the structure can be simplified and the components can be made versatile.

[0280] like Figures 27-30 As shown, the refrigerant line 96 is configured to include a hose 96a, a pipe (steel pipe) 96b, a connector 96c, etc. The refrigerant line 96 enters the compressor 18 through the inlet 89 into the routing path 98, and is clamped by the clamping part 99 at the middle of the routing path 98. A pair of refrigerant lines 96 are provided. One refrigerant line 96A extends from the clamping part 99 through the side wall 86L of one (left) side to the air conditioning unit 29. The other refrigerant line 96B, after passing through the side wall 86L of one side, extends forward to connect with the condenser 23, and from the condenser 23 to the receiver 24, extends backward from the receiver 24 to connect with the air conditioning unit 29. One refrigerant line 96A and the other refrigerant line 96B are detachable from the side wall 86L of one side.

[0281] like Figure 27 As shown, the heat medium pipeline 97 is configured to include a flexible hose 97a, a piping (steel pipe) 97b, a connector, etc. A pair of heat medium pipelines 97 are provided. The pair of heat medium pipelines 97 are inserted from the prime mover E1 through the inlet 89 into the routing path 98, and after passing through one side wall 86L, ​​they connect to the air conditioning unit 29.

[0282] Figure 31This indicates the state where the compressor 18 is removed from the prime mover E1, the condenser 23 and the receiver 24 are removed from the unit 2, and the refrigerant line 96 is disconnected from one side wall 86L. With the cab 5 removed from the unit 2, and the refrigerant line 96 connected to the compressor 18, condenser 23, receiver 24, and air conditioning unit 29, the compressor 18, condenser 23, and receiver 24 can be stored in the cab 5. In other words, the cab 5 can be removed from the unit 2 without disconnecting the refrigerant line 96 from the compressor 18, condenser 23, and receiver 24 (without discharging refrigerant).

[0283] Furthermore, since the condenser 23 and the liquid reservoir 24 are arranged on the front side of the cab 5, in the case of a non-cab-sized work machine 1, the condenser 23 and the liquid reservoir 24 are not mounted on the body 2, so the arrangement of the condenser 23 and the liquid reservoir 24 can be formed as a passage.

[0284] Figure 32 , Figure 33 This refers to the air intake structure 101 that draws air into the prime mover E1, and the exhaust structure 102 that discharges the exhaust gas from the prime mover E1 to the outside of the prime mover chamber E2.

[0285] like Figure 32 , Figure 33 As shown, the air intake structure 101 includes: an air intake box 103 for drawing in air; a silencer box 104 for reducing intake noise; a connecting box 105 connecting the air intake box 103 and the silencer box 104; and an air filter 27. The exhaust structure 102 includes an exhaust gas purification device 26 and an exhaust pipe 106. The air intake structure 101 is located to the side (left side) of the exhaust gas purification device 26. Additionally, the air intake structure 101 is located on the other side (left side) of the body 2 in the width direction K2.

[0286] like Figure 32 , Figure 33 As shown, the air intake box 103 has a front wall 103a, an upper wall 103b, a lower wall 103c, a first side wall 103d on the left, and a second side wall 103e on the right, and is formed to open rearward. Furthermore, as... Figure 34 As shown, an external air intake 109 is formed at the second part 43Fb of the sixth cover 43F, which allows air (external air) to be drawn in through the opening 107 at the rear of the air intake box 103. The external air intake 109 is formed, for example, by a louver or multiple holes.

[0287] The exhaust gas purification device 26 side and the gap 108 side are separated by the air inlet box 103, and the intake air of the prime mover E1 is drawn in from the opening 107 provided on the rear side of the air inlet box 103, thereby preventing the intake of hot air from the exhaust gas purification device 26 side provided on the right side of the air inlet box 103.

[0288] In addition, the outlet 91 of the pipe structure 45 is located on the right side (one side) of the machine body width direction K2, and the air intake structure 101 introduces external air from the left side (the other side) of the machine body width direction K2. Therefore, it can prevent the hot air discharged from the prime mover chamber E2 from being drawn into the prime mover E1.

[0289] like Figure 34 As shown, air drawn into the air intake box 103 flows through the connecting box 105 to the muffler box 104, and from the muffler box 104 to the air filter 27. From the air filter 27, air flows to the prime mover E1 via the intake hose 110, etc.

[0290] like Figure 32 , Figure 33 As shown, the exhaust duct 106 is longitudinally arranged between the exhaust gas purification device 26 and the rotating base plate 31. The exhaust duct 106 has an inlet opening 106a opening to the right at the top and an outlet opening 106b opening to the rear at the bottom. Figure 33 As shown, an exhaust pipe 111 is connected to the exhaust gas discharge side 26a of the exhaust gas purification device 26. The exhaust pipe 111 is bent toward the inlet opening 106a of the exhaust pipe 106. The exhaust gas discharged from the prime mover E1 is blown out of the exhaust pipe 111 toward the inlet opening 106a through the exhaust gas purification device 26 and discharged from the outlet opening 106b.

[0291] On the other hand, such as Figure 7 As shown, a discharge section 112 is formed by cutting a notch on the lower right side of the counterweight 33. Exhaust gas discharged from the outlet opening 106b of the exhaust pipe 106 is discharged to the outside through the discharge section 112.

[0292] The aforementioned work machine 1 includes: a traveling device 3; a body 2 rotatably supported on the traveling device 3; a rotary motor 20 for rotating the body 2; a tank (fuel tank 19) disposed near the rotary motor 20; and a support platform 52 for supporting the tank 19. The tank 19 has a tank body 19A and an extension 19B extending from the tank body 19A toward the upper side of the rotary motor 20. In order to allow the extension 19B to retract from the upper side of the rotary motor 20, it is movably supported on the support platform 52.

[0293] According to this structure, by moving the tank 19, the extension 19B is moved away from the upper side of the rotary motor 20, which ensures the maintenance of the rotary motor 20. Therefore, the capacity can be increased by providing the extension 19B extending to the upper side of the rotary motor 20 in the tank 19, and the space above the rotary motor 20 can be effectively utilized.

[0294] In addition, the extension 19B blocks the path of the rotary motor 20 being removed from the body 2 to the upper side, namely the motor removal path 61, and extends to the upper side of the rotary motor 20.

[0295] According to this structure, even if an extension 19B is provided extending from the tank body 19A to the upper side of the rotary motor 20, the extension 19B can be retracted from the upper side of the rotary motor 20, so the rotary motor 20 can be removed from the motor removal path 61.

[0296] In addition, the machine body 2 has a cockpit 5 mounted on it, a rotary motor 20 is located below the cockpit 5, and a motor removal path 61 is formed between the cockpit 5 and the support platform 52.

[0297] According to this structure, the rotary motor 20 can be removed without removing the cab 5 from the body 2.

[0298] In addition, the support platform 52 has a pair of mounting portions 55c that slidably support the can 19 in the can moving direction 58, which is the direction in which the can 19 moves. The pair of mounting portions 55c are arranged side by side at a distance in a horizontal direction orthogonal to the can moving direction 58. The can 19 has a protrusion 19C that protrudes from the can body 19A between the pair of mounting portions 55c.

[0299] According to this structure, a protrusion 19C can be provided on the tank 19 without hindering its movement, thereby achieving an increase in capacity caused by providing the protrusion 19C.

[0300] In addition, it has a mounting frame 62 erected on the support platform 52 and a mounting support 63 set on the upper part of the tank 19. The mounting frame 62 has a support mounting part 62B on which the mounting support 63 is detachably mounted.

[0301] This structure can restrict the movement of tank 19.

[0302] In addition, the device 66 is provided to support the equipment mounted on the body 2, and the mounting frame 62 has a frame mounting part 62C mounted on the support frame 66.

[0303] It can reliably restrict the movement of tank 19.

[0304] In addition, the prime mover E1 is mounted on the machine body 2, and the tank 19 can also be a fuel tank 19 for storing fuel for the prime mover E1.

[0305] In addition, the work machine 1 includes: a body 2; a cab 5 mounted on the body 2; an air conditioning unit 29 for air conditioning inside the cab 5; and a prime mover compartment E2 for housing the prime mover E1 mounted on the body 2, with the air conditioning unit 29 positioned above the prime mover compartment E2.

[0306] According to this structure, by placing the air conditioning unit 29 above the prime mover compartment E2, the operator's foot space can be expanded compared to a structure in which the air conditioning unit 29 is placed below the driver's seat 6.

[0307] In addition, the cab 5 has a driver's seat 6 located in the interior of the cab 5. The cab 5 has a plate member 75 located behind the driver's seat 6 for mounting the air conditioning unit 29. The plate member 75 is located above the prime mover compartment E2 and spaced apart from the prime mover compartment E2, and is supported on the body 2 by a pad frame member 41 for vibration damping.

[0308] According to this structure, the heat transfer from the prime mover chamber E2 to the air conditioning unit 29 can be suppressed, and the structure can be simplified and the components can be reused.

[0309] In addition, the front part of the plate member 75 is disposed inside the cab 5, and the rear part protrudes rearward from the back of the cab 5.

[0310] According to this structure, it is possible to prevent the air conditioning unit 29 from narrowing the interior space of the driver's cab 5.

[0311] Additionally, it includes: a cooling fan 14 that introduces outside air into the prime mover chamber E2; a compressor 18 that is driven by the power of the prime mover E1 to compress the refrigerant; and a refrigerant pipeline 96 connected to the compressor 18 with an inlet 89 for introducing hot air into the prime mover chamber E2 through communication with the upper part of the prime mover chamber E2, and an outlet 91 for discharging the hot air introduced from the inlet 89 through communication with the outside of the prime mover chamber E2.

[0312] According to this structure, the routing path 98 of the refrigerant pipeline 96 can be used as the exhaust path for the hot gas in the prime mover chamber E2, which can simplify the structure and make the components usable.

[0313] Additionally, the compressor mounting section 95, which is provided for mounting the compressor 18, has a layout path 98 comprising: a pair of side walls 86 arranged at intervals opposite each other in the width direction K2 of the machine body; a bottom wall 87 that closes the lower rear ends of the pair of side walls 86; and a cover wall 88 that closes the upper ends and the front ends of the pair of side walls 86. An inlet 89 is formed between the bottom wall 87 and the cover wall 88, and an outlet 91 is formed at the rear of the cover wall 88. The compressor mounting section 95 is provided below the inlet 89 and communicates with the inlet 89.

[0314] Based on this structure, the refrigerant piping 96 can be easily laid out.

[0315] In addition, the compressor configuration unit 95 has: a main body portion 95A having a maintenance opening 95a that opens forward and communicates between a pair of side walls 86; and an opening and closing cover 95B that closes the maintenance opening 95a, the opening and closing cover 95B being able to be installed and removed integrally with the cover wall 88.

[0316] According to this structure, the condenser 23 can be accessed simply by removing the opening and closing cover 95B together with the cover wall 88.

[0317] Additionally, on the side of the front of the cab 5 and in front of the compressor 18, there is a condenser 23 that dissipates heat from the refrigerant from the compressor 18 and liquefies it, and a liquid receiver 24 that stores the refrigerant liquefied by the condenser 23. The compressor 18, the condenser 23 and the liquid receiver 24 can be removed from the body 2 together with the cab 5.

[0318] According to this structure, the cab 5 can be removed from the body 2 without disconnecting the refrigerant lines 96 from the compressor 18, condenser 23 and receiver 24.

[0319] In addition, a compressor mounting section 95 is provided for mounting the compressor 18. The compressor mounting section 95 is positioned on one side of the body width direction K2 relative to the cab 5, and the compressor 18 can be accessed from inside the cab 5.

[0320] This structure improves the maintainability of the compressor 18, the adjustment of the drive belt 92 that transmits power to the compressor 18, and other aspects.

[0321] Additionally, the machine body 2 includes: a base plate (rotating base plate 31); a first longitudinal rib 32R, disposed on one side of the base plate 31 in the machine body width direction K2 and extending from the front to the rear of the base plate 31; and a second longitudinal rib 32L, disposed on the other side of the base plate 31 in the machine body width direction K2 and extending from the front to the rear of the base plate 31. It also includes: a hydraulic actuator driven by working oil; a working oil tank 28 for storing working oil; a hydraulic pump 25 for discharging working oil from the working oil tank 28; and a control valve V1 for controlling the flow of working oil from the hydraulic pump 25 to the hydraulic system. The flow rate of the working oil supplied by the actuator; and the hydraulic hose (delivery hose 114), connecting the hydraulic pump 25 and the control valve V1, the working oil tank 28 is located on the other side of the machine body width direction K2, which is closer to the second longitudinal rib 32L, the control valve V1 is located on the other side of the machine body width direction K2, which is closer to the second longitudinal rib 32L, and is located in front of the working oil tank 28, the hydraulic pump 25 is located on the rear side of the machine body, which is closer to the front end of the working oil tank 28, and the hydraulic hose 114 is laid between the second longitudinal rib 32L and the working oil tank 28.

[0322] According to this structure, the maintainability of the suction filter and return filter 115 configured in the working oil tank 28 can be improved, and the noise generated by the interference between the hydraulic hose (delivery hose 114) and the outer packaging can be avoided.

[0323] In addition, the interiors of the prime mover compartment E2 and the driver's cab 5 are separated by a double structure of a partition wall 74 that separates the prime mover compartment E2 from the exterior of the prime mover compartment E2 and the outer wall (floor plate 84) of the driver's cab 5, with the working oil tank 28 forming part of the partition wall 74.

[0324] According to this structure, the heat transfer from the prime mover chamber E2 to the driver's cab 5 can be suppressed, and the components can be reused.

[0325] In addition, a fuel tank 19 is provided to store fuel for the prime mover E1. The fuel tank 19 is configured above the first longitudinal rib 32R and runs transversely through the first longitudinal rib 32R in the width direction K2 of the fuselage.

[0326] According to this structure, compared to the case where the fuel tank 19 is located behind the cab 5, the cab 5 can be located on the rear side of the fuselage, which can improve the stability of the fuselage.

[0327] In addition, the exhaust port 91 is located on one side of the body width direction K2, and has an air intake structure 101 for introducing air into the prime mover E1. The air intake structure 101 introduces external air from the other side of the body width direction K2.

[0328] According to this structure, it is possible to prevent hot air discharged from the prime mover chamber E2 from being drawn into the prime mover E1 as intake air.

[0329] Figures 35-95 Other implementation methods are indicated. Figure 35 This is a schematic side view showing the overall structure of the work machine 1 according to other embodiments. Figure 36 This is a schematic top view of the work machine 1 according to other embodiments. In this embodiment, a backhoe excavator is also exemplified as a rotary work machine as the work machine 1.

[0330] like Figure 35 As shown, the work machine 1 includes a body (turntable) 2, a traveling device 3, and a working device 4. The body 2 is equipped with a driver's seat 6 and a top cover 5 serving as a sunshade for the operator (driver) seated in the driver's seat 6. The top cover 5 may also function as a driver protection device to protect the operator. Furthermore, in this embodiment, the work machine 1 is exemplified by a top cover-style work machine; alternatively, it could be a work machine with a cab-style work machine in which a cab surrounding the driver's seat 6 is mounted on the body 2 instead of a top cover 5.

[0331] In this embodiment, the direction will also be towards the front of the operator seat 6 of the machine 1. Figure 35 , Figure 36 The direction of arrow A1 is called the front (front of the aircraft), and its opposite direction ( Figure 35 , Figure 36 The direction of arrow A2 is called the rear (rear of the aircraft). Figure 35 , Figure 36 The direction of arrow K1 is called the front-back direction. Additionally, the direction towards the operator's left (…) Figure 35 The inside, Figure 36 The direction of arrow B1 is called the left, and it will point towards the operator's right ( Figure 35 The near anterior side, Figure 36 The direction of arrow B2 is called the right side. Additionally, the direction orthogonal to the front-back direction (front-back direction of the aircraft) K1, i.e., the horizontal direction, is called the width direction of the aircraft K2 (refer to...). Figure 36 (This will be explained.)

[0332] In this embodiment, for those related to the above Figures 1-34 In a single embodiment, components identical to those shown are labeled with the same reference numerals and their descriptions are omitted. Furthermore, descriptions are sometimes repeated.

[0333] like Figure 37 As shown, the support bracket 9 is composed of a pair of upper and lower plates and is fixed to the front of the reinforcing rib 32. Specifically, the support bracket 9 has: an upper plate 9A, fixed to the upper end of the reinforcing rib 32; and a lower plate 9B, fixed to the lower front part of the reinforcing rib 32. The upper plate 9A has: a main portion 9Aa, disposed across the front of the upper ends of the first longitudinal rib 32R and the second longitudinal rib 32L; a first extending portion 9Ab, extending rearward from the upper end of the main portion 9Aa on the first longitudinal rib 32R; and a second extending portion 9Ac, extending rearward from the upper end of the main portion 9Aa on the second longitudinal rib 32L. The lower plate 9B has: an upper wall 9Ba, disposed below the front of the main portion 9Aa; and a longitudinal wall 9Bb, extending downward from the rear end of the upper wall 9Ba. A cylindrical boss 122 is fixed across the front of the main portion 9Aa and the front of the upper wall 9Ba. The swing bracket 10 is swingably supported on the cylindrical boss 122 via a longitudinal axis.

[0334] The counterweight 33 is mounted on the rear of the rotating base plate 31. The counterweight 33 constitutes the rear of the body 2.

[0335] A partition 34 is fixed at the midpoint of the front-rear direction K1 of the rotating base plate 31. The partition 34 extends longitudinally along the width direction K2 of the machine body and passes through the first longitudinal rib 32R and the second longitudinal rib 32L. A prime mover E1 is mounted between the partition 34 and the counterweight 33 on the rotating base plate 31.

[0336] like Figure 37As shown, a support frame 123 supporting the rear end of the swing cylinder C1 is disposed in front of the right side of the partition 34 and to the right of the first longitudinal rib 32R. The support frame 123 includes a lower support 123A and an upper support 123B. The lower support 123A is mounted and fixed on the rotating base plate 31, with its rear end fixed to the front surface of the partition 34 and its left end fixed to the right surface of the first longitudinal rib 32R. The upper support 123B is disposed above the lower support 123A, with its rear end fixed to the front surface of the partition 34 and its left end fixed to the right surface of the first longitudinal rib 32R. On the right side of the support frame 123, a pin 124 pivotally supporting the rear end of the swing cylinder C1 is provided, spanning the upper support 123B and the lower support 123A.

[0337] like Figure 38 As shown, the body 2 has a cover device 143 that covers the equipment, parts, components, etc. mounted on the rotating frame 30. The cover device 143 is configured to have multiple covers. The multiple covers include a first cover 143A to a tenth cover 143J.

[0338] The first cover 143A is located on the front right side of the body 2 and covers the front of the battery 22, etc. The first cover 143A can be removed, and by removing it, the battery 22, etc. can be inspected / maintained.

[0339] The second cover 143B is configured to extend rearward and upward from the upper part of the first cover 143A, covering the upper part of the fuel tank 19 and the battery 22. The rear part of the second cover 143B is pivotally supported by a hinge so as to be able to rotate about an axis extending in the width direction K2 of the fuselage and open upward. By opening the second cover 143B, fuel supply to the fuel tank 19 and inspection / maintenance of the fuel tank 19 and the battery 22 can be performed.

[0340] The third cover 143C covers the right side of the fuel tank 19 and battery 22. The rear of the third cover 143C is pivotally supported by a hinge, allowing it to rotate about an axis extending vertically, and opens rearwards. Opening the third cover 143C allows for inspection / maintenance of the fuel tank 19 and battery 22. Furthermore, opening the second cover 143B and the third cover 143C exposes the top and sides of the fuel tank 19. Moreover, the third cover 143C is not limited to a hinged pivot support structure; for example, it can also be a structure that can be detachably installed using bolts.

[0341] The fourth cover 143D covers the radiator 15, oil cooler 16, and fuel cooler 17, etc. Specifically, the fourth cover 143D includes: an upper wall portion 143D1 covering the top of the radiator 15, oil cooler 16, and fuel cooler 17, etc.; and an outer wall portion 143 (side wall portion) D2 covering the radiator 15, oil cooler 16, and fuel cooler 17, etc., from the right side to the rear. The front of the fourth cover 143D is pivotally supported by a hinge, allowing rotation about an axis extending vertically, and opens forward. By opening the fourth cover 143D, inspection / maintenance of the radiator 15, oil cooler 16, and fuel cooler 17, etc., is possible. The upper wall portion 143D1 has an external air inlet 125 for drawing external air into the fourth cover 143D by the suction of the cooling fan 14.

[0342] The fifth cover 143E covers the right side of the prime mover E1 and the area above the cooling fan 14, etc. The fifth cover 143E has an exhaust section 126 that exhausts the hot air above the prime mover E1 to the outside of the cover assembly 143.

[0343] The sixth cover 143F and the seventh cover 143G cover the rear of the prime mover E1. The sixth cover 143F has an opening 127 that is opened and closed by the seventh cover 143G. The right side of the seventh cover 143G is pivotally supported by a hinge so as to be able to rotate about an axis extending in the vertical direction, and opens to the right. To the left of the seventh cover 143G on the sixth cover 143F, an air intake 128 is provided for taking in air drawn into the air filter 27.

[0344] The eighth cover 143H covers the upper part of the working oil tank 28 and the left side of the air filter 27. The rear part of the eighth cover 143H is pivotally supported by a hinge so as to be able to rotate about an axis extending in the vertical direction, and opens to the rear. By opening the eighth cover 143H, the working oil tank 28, the air filter 27 and the hydraulic pump 25 can be inspected / maintained.

[0345] The ninth cover 143I is positioned below the eighth cover 143H and covers the lower part of the working oil tank 28.

[0346] The tenth cover 143J covers the top of the prime mover E1.

[0347] like Figure 39As shown, the rotary motor 20 is positioned in front of the partition 34 and near the first longitudinal rib 32R between the first longitudinal rib 32R and the second longitudinal rib 32L. The rotary motor 20 is mounted on the rotary base plate 31. A rotary pinion (not shown) is mounted at the lower part of the rotary motor 20, driven by the power of the rotary motor 20 around its longitudinal axis. The rotary pinion meshes with an internal gear provided in the rotary bearing 8. The rotary bearing 8 has: an outer ring mounted on the body 2; and an inner ring rotatably disposed on the inner circumference of the outer ring around the rotation axis X1. An internal gear is formed on the inner circumference of the inner ring. Therefore, the body 2 rotates around the rotation axis X1 by being driven by the rotary motor 20 to move along the internal gear.

[0348] The fuel tank 19 is positioned above the first longitudinal rib 32R (reinforcing rib 32), and extends transversely from the right end of the fuselage 2 (to the right of the first longitudinal rib 32R) along the width direction K2 of the fuselage, passing over the first longitudinal rib 32R and extending towards the upper side of the rotary motor 20. The fuel tank 19 is positioned near the rotary motor 20. Specifically, it is positioned to the right of the rotary motor 20.

[0349] like Figure 39 , Figure 40 As shown, the fuel tank 19 is supported on a support platform 52 mounted on the rotating frame 30 (body 2). A fuel supply pump 72 is disposed on the lower side of the support platform 52. The fuel supply pump 72 is mounted on the support platform 52.

[0350] like Figure 39 As shown, a suction hose 129 for conveying fuel from a fuel storage container to a fuel supply pump 72 is wound and held at the upper part of the fuel tank 19. A supply pipe 131 is provided at the upper part of the fuel tank 19, connected to a delivery hose 130 that conveys fuel discharged from the fuel supply pump 72 to the fuel tank 19.

[0351] like Figure 41 , Figure 42 , Figure 43 As shown, the fuel tank 19 includes: a tank body 19A, disposed to the right of the rotary motor 20; an extension 19B extending to the left from the tank body 19A and extending above the rotary motor 20; and a protrusion 19C protruding downward from the bottom 19Aa of the tank body 19A. The protrusion 19C is formed at approximately the center of the tank body 19A in the front-rear direction K1, extending along the width direction K2 of the engine body. The rotary motor 20 is disposed below the extension 19B.

[0352] In the fuel tank 19 of this embodiment, the capacity of the fuel tank 19 can be increased by providing the protrusion 19B and the protrusion 19C. Furthermore, the protrusion 19C can separate water from the fuel. Figure 40As shown, a drain pipe 132 for draining water from the fuel tank 19 is connected to the bottom of the protrusion 19C. A supply pipe 133 for supplying fuel from the fuel tank 19 to the prime mover E1 is connected to the right side of the protrusion 19C. By providing a fuel outlet connected to the supply pipe 133 on the right side of the protrusion 19C, cleaning can be easily performed even if the fuel outlet is closed.

[0353] The bottom surface of the can body 19A and the front and rear surfaces of the protrusion 19C are set as the lower surface 48 of the mounting parts 55c1 and 55c2 described later.

[0354] like Figure 41 , Figure 42 , Figure 43 As shown, the fuel tank 19 is supported on the support platform 52 in a manner that allows it to move horizontally (moving direction Y3) to a setting position S1 and a pull-out position S2 from the setting position S1. The setting position S1 is... Figure 41 and Figure 42 The position shown is the position within the cover device 143. The pull-out position S2 is... Figure 44 The position shown is one in which the fuel tank 19 (protrusion 19B) can be retracted from the upper side of the rotary motor 20. In this embodiment, the fuel tank 19 can be pulled outward (to the right) from the installation position S1 in the width direction K2 of the machine body.

[0355] By pulling the fuel tank 19 from the set position S1 to the pulled-out position S2, the protrusion 19B retracts from above the rotary motor 20, allowing access to and maintenance of the rotary motor 20. Furthermore, by retracting the protrusion 19B from above the rotary motor 20, the rotary motor 20 can be removed upwards. Additionally, by moving the fuel tank 19 to retract the protrusion 19B from above the rotary motor 20, maintenance and removal of the rotary motor 20 are ensured. Therefore, by providing the protrusion 19B extending upwards from the fuel tank 19 towards the rotary motor 20, capacity can be increased, and the space above the rotary motor 20 can be effectively utilized. Moreover, by pulling the fuel tank 19 from the set position S1 to the pulled-out position S2, maintenance of the fuel tank 19 can be easily performed, improving maintainability.

[0356] Next, the structure of the support platform 52 will be described.

[0357] like Figure 45 , Figure 46 , Figure 47 As shown, the support platform 52 has a first side plate 53, a second side plate 54, and an upper plate 55. The first side plate 53, the second side plate 54, and the upper plate 55 are formed of sheet metal and are appropriately fixed to each other by welding or the like.

[0358] like Figure 46 , Figure 47 As shown, the first side panel 53 has: a longitudinal wall 53A that is longer in the front-rear direction K1, arranged with its surface facing the width direction K2 of the body; and a mounting wall 53B that extends to the left from the lower end of the longitudinal wall 53A. Furthermore, the first side panel 53 has: a front upper edge 53a that serves as the upper end of the front portion of the longitudinal wall 53A; a longitudinal edge 53b that extends downward from the rear end of the front upper edge 53a; and a rear upper edge 53c that extends rearward from the lower end of the longitudinal edge 53b. The front portion of the mounting wall 53B is bolted to a boss member 134 fixed to the first extension portion 9Ab. The rear portion of the mounting wall 53B is bolted to a mounting member 135 fixed to the left side of the upper bracket 123B.

[0359] like Figure 46 , Figure 47 , Figure 48 As shown, the second side panel 54 has: a longitudinal wall 54A that is longer in the vertical direction and is arranged with the panel surface facing the width direction K2 of the body; an extension wall 54B that extends rearward from the upper part of the longitudinal wall 54A; a first mounting wall 54C that extends to the right from the upper rear end of the extension wall 54B; and a second mounting wall 54D that extends to the right from the lower end of the longitudinal wall 54A. In addition, the second side panel 54 has: a front upper edge 54a that is the upper end of the longitudinal wall 54A; a longitudinal edge 54b that extends downward from the rear end of the front upper edge 54a; a rear upper edge 54g that extends rearward from the lower end of the longitudinal edge 54b; and a downwardly recessed flange portion 54e provided between the rear upper edge 54g and the first mounting wall 54C.

[0360] like Figure 47 , Figure 48 As shown, the recessed edge 54e is configured to have: a first edge 54e1 extending downward from the rear end of the upper rear edge 54g; a second edge 54e2 extending downward from the front end and left end of the first mounting wall 54C; and a third edge 54e3 connecting the lower ends of the first edge 54e1 and the second edge 54e2 to each other. The first mounting wall 54C is bolted to the front part of the upper surface of the support plate 137. The support plate 137 is fixed to the upper end of the longitudinal plate 136 erected on the right side of the upper bracket 123B.

[0361] like Figure 46 As shown, the upper plate 55 is fixed across the first side plate 53 and the second side plate 54.

[0362] like Figure 46 , Figure 47 As shown, the upper plate 55 has a battery mounting wall 55a; a hanging wall 55b; a pair of front and rear mounting portions 55c1 and 55c2; and a connecting wall 55d.

[0363] A battery mounting wall 55a is disposed across the upper front edges 53a and 54a of the first side plate 53 and the second side plate 54. A battery 22 (see reference) is mounted and installed in the battery mounting wall 55a. Figure 39 ).

[0364] The hanging wall 55b extends downward from the rear edge of the battery mounting wall 55a and is disposed between the longitudinal edges 53b and 54b of the first side plate 53 and the second side plate 54.

[0365] One of the pair of mounting portions 55c1 and 55c2 (front side), the mounting portion 55c1 extends rearward from the lower edge of the hanging wall 55b and is disposed across the front portion of the rear upper edge 53c of the first side plate 53 and the rear upper edge 54g of the second side plate 54. The mounting portion 55c1 of one of them protrudes to the right from the rear upper edge 53c of the first side plate 53. The mounting portion 55c2 of the other (rear side) is spaced apart behind the mounting portion 55c1 and is disposed across the rear portion of the rear upper edge 53c of the first side plate 53 and the upper surface of the first mounting wall 54C of the second side plate 54. Figure 47 As shown, at the rear of the other mounting portion 55c2, a first support piece 155a, a second support piece 155b, and a third support piece 155c are formed sequentially from the right at intervals. The first support piece 155a overlaps the upper surface of the first mounting wall 54C and is fixed to the support plate 137 together with the first mounting wall 54C by bolts.

[0366] like Figure 43 , Figure 48 As shown, the fuel canister 19 is mounted in a pair of mounting portions 55c1 and 55c2 in a manner that allows it to move (slide) along the width direction K2 of the fuselage. Specifically, there is a mounting lower surface 48a on the front side of mounting portion 55c1 and a mounting lower surface 48b on the rear side of mounting portion 55c1. That is, the support platform 52 has a pair of mounting portions 55c1 and 55c2 that slidably support the fuel canister 19 in the direction of movement Y3, and these mounting portions 55c1 and 55c2 are arranged side-by-side with a gap in a horizontal direction orthogonal to the movement direction Y3. In this embodiment, the mounting lower surface 48 is mounted on the mounting portions 55c1 and 55c2 via a lowering member 59 provided on the upper surface of the mounting portions 55c1 and 55c2. The lowering member 59 is formed, for example, of a member with low frictional resistance or a member with cushioning properties. Alternatively, the underlayment member 59 can also be formed from a member with low frictional resistance and buffering properties.

[0367] like Figure 43 , Figure 48 As shown, the protrusion 19C protrudes between a pair of mounting portions 55c1 and 55c2 and is located within the recessed edge portion 54e.

[0368] like Figure 46 , Figure 47 As shown, the connecting wall 55d connects the left ends of a pair of mounting portions 55c to each other. The protrusion 19C is disposed on the right side of the connecting wall 55d. The connecting wall 55d is mounted and supported on the rear upper edge 53c.

[0369] In addition, in this embodiment, the support platform 52 is formed by combining the tank support platform for supporting the fuel tank 19 and the battery support platform for supporting the battery 22, but the tank support platform and the battery support platform can also be formed separately.

[0370] like Figure 40 As shown, the work machine 1 has a fixing device 141 capable of fixing the fuel tank 19 in the setting position S1 and the pulled-out position S2. The fixing device 141 includes a first fixing device 160, a second fixing device 170, a third fixing device 180A, and a fourth fixing device 180B.

[0371] First, the first fixing device 160 will be described.

[0372] The first fixing device 160 is a device (fixing belt device) that uses a belt 161 to press and fix the fuel tank 19 to the support platform 52 in the set position S1 state.

[0373] like Figure 41 , Figure 42 , Figure 43 As shown, the first fixing device 160 includes a first fixing strap device 160A and a second fixing strap device 160B. When the fuel tank 19 is in the setting position S1, the first fixing strap device 160A fixes the fuel tank 19 on the left side (the direction from the pull-out position S2 towards the setting position S1) in the pushing direction Y1. In this embodiment, the first fixing strap device 160A fixes the root side of the protrusion 19B. When the fuel tank 19 is in the setting position S1, the second fixing strap device 160B fixes the fuel tank 19 on the right side (the direction from the setting position S1 towards the pull-out position S2) in the pulling direction Y2.

[0374] The first fixing belt device 160A and the second fixing belt device 160B have a locking member 162, a fixing piece 163, a belt 161, a belt hook 164, and a belt fastener 165.

[0375] like Figure 41 , Figure 42 , Figure 43 As shown, the locking member 162 is formed of a rod. The locking member 162 is positioned near the lower part of the fuel tank 19. Figure 42As shown, the locking member 162A of the first fixing strap device 160A is fixed to the mounting plate 166 erected on the third support piece 155c of the other mounting portion 55c2, and the locking member 162B of the second fixing strap device 160B is fixed to the first support piece 155a of the other mounting portion 55c2.

[0376] like Figure 45 , Figure 46 As shown, the mounting plate 166 has a longitudinal plate portion 166a that rises from the third support plate 155c and a transverse plate portion 166b that extends to the left from the upper part of the longitudinal plate portion 166a. The locking member 162A has: a hook portion 162Aa, spaced apart above the transverse plate portion 166b and extending along the width direction K2 of the machine body; and a pair of feet 162Ab, extending downward from the left and right ends of the hook portion 162Aa and fixed to the transverse plate portion 166b. The locking member 162B has: a hook portion 162Ba, spaced apart above the first support plate 155a and extending along the width direction K2 of the machine body; and a pair of feet 162Bb, extending downward from the left and right ends of the hook portion 162Ba and then forward, fixed to the first support plate 155a.

[0377] like Figure 43 As shown, the retaining plate 163 is positioned on the opposite side of the locking member 162, such that the fuel tank 19 is sandwiched between the retaining plate 163 and the locking member 162. The retaining plate 163 is fixed to the support member 183 erected on the battery mounting wall 55a.

[0378] like Figure 45 , Figure 46 As shown, the support member 183 includes: a first support member 183A, disposed on the left and rear of the battery mounting wall 55a; and a second support member 183B, disposed on the right and rear of the battery mounting wall 55a. A mounting plate 183Aa is fixed to the lower end of the first support member 183A, and the mounting plate 183Aa is fixed to a mounting block 167 fixed to the battery mounting wall 55a by bolts. The lower end of the second support member 183B is fixed to the battery mounting wall 55a. The fixing piece 163A of the first fixing strap device 160A is fixed to the left side of the left surface of the first support member 183A midway through the vertical direction. The fixing piece 163B of the second fixing strap device 160B is fixed to the right side of the right surface of the second support member 183B midway through the vertical direction.

[0379] like Figure 43 As shown, the belt 161 extends from the locking member 162 across the upper surface of the fuel tank 19 and is positioned toward the retaining piece 163. A groove is formed on the upper surface of the fuel tank 19 for the belt 161 to be inserted.

[0380] like Figure 41 ,Figure 42 , Figure 43 As shown, a hook 164 is disposed at one end of the belt 161 along its length and hooks onto the locking member 162. Specifically, the hook 164 is hook-shaped; the hook 164A of the first fixing belt device 160A hooks onto the stopping portion 162Aa of the locking member 162A, and the hook 164B of the second fixing belt device 160B hooks onto the stopping portion 162Ba of the locking member 162B.

[0381] A fastener 165 is provided at the other end of the belt 161 along its length, tautly fixing the belt 161 to the fixing plate 163. Specifically, the fastener 165 of the first belt fixing device 160A and the second belt fixing device 160B includes a bolt member 168, a fastening nut 169A, and a locking nut 169B. The upper part of the bolt member 168 is fixed to the belt by welding or the like, and the lower part has a screw portion 168a (the portion with the external thread cut off). The fastener 165 inserts the screw portion 168a from above into the fixing plate 163, and the fastening nut 169A is positioned on the lower side of the fixing plate 163, threadedly engaging with the screw portion 168a and tightening it, thereby tautling the belt 161. Furthermore, after tautling the belt 161, the locking nut 169B threadedly engages with the screw portion 168a, thereby preventing the fastening nut 169A from loosening.

[0382] In the first fixing device 160 described above, the belt 161 can be removed by removing the locking nut 169B and the fastening nut 169A from the bolt member 168. The belt 161 of the first fixing device 160 (first fixing belt device 160A, second fixing belt device 160B) can be removed when the fuel tank 19 is moved from the set position S1 to the pull-out position S2.

[0383] Next, the second fixing device 170 will be described.

[0384] The second fixing device 170 is a device that positions and fixes the fuel tank 19 in the setting position S1 and the pull-out position S2 by means of the engaging part 171 provided on the support platform 52 and the first engaging part 172 and the second engaging part 173 provided on the fuel tank 19.

[0385] like Figure 49 , Figure 50 , Figure 51As shown, in the second fixing device of this embodiment, the engaging portion 171 provided on the support platform 52 is composed of rollers. Engaging portions 171 are respectively provided on a pair of mounting portions 55c1 and 55c2. Specifically, engaging portions 171 are provided on the front end side of mounting portions 55c1 and the front end side of mounting portions 55c2. That is, engaging portions 171 include: an engaging portion 171A provided on the front side of mounting portion 55c1; and an engaging portion 171B provided on the rear side of mounting portion 55c2.

[0386] like Figure 50 As shown, an open L-shaped cutout 177A is formed at the rear and right side of the front end of the mounting portion 55c1. A plate member 175 is fixed to the front end and lower surface of the mounting portion 55c1, covering the cutout from below. The front engaging portion 171A rotatably engages with a support shaft 174A extending in the front-rear direction K1 about an axis. A rectangular block-shaped shaft mounting member 176A is fixed to the rear of the support shaft 174A and behind the engaging portion 171A. The shaft mounting member 176A is secured to the rear of the plate member 175 by means of a bolt. Figure 48 As shown, the support shaft 174A is disposed across the upper surface of the shaft mounting member 176A and the mounting portion 55c1, and the engaging portion 171A is rotatably disposed between the shaft mounting member 176A and the mounting portion 55c1 in the form of protruding upward from the upper surface of the mounting portion 55c1.

[0387] like Figure 50 As shown, on the front end side of the mounting portion 55c2, an open L-shaped cutout 177B is formed at the front and right sides. The cutout 177B is covered from below by the first mounting wall 54C. The rear engaging portion 171B rotatably engages with the support shaft 174B extending in the front-rear direction K13 about its axis. A rectangular block-shaped shaft mounting member 176B is fixed at the front of the support shaft 174B and in front of the engaging portion 171B. By fixing the shaft mounting member 176B to the front of the first mounting wall 54C, as shown... Figure 48 As shown, the support shaft 174B is disposed across the upper surface of the shaft mounting member 176B and the mounting portion 55c2, and the engaging portion 171B is rotatably disposed between the shaft mounting member 176B and the mounting portion 55c2 in a manner that protrudes upward from the upper surface of the mounting portion 55c2.

[0388] like Figure 51As shown, the first engaging portion 172 and the second engaging portion 173 provided on the fuel tank 19 are formed by recesses for engaging the engaging portion (roller) 171. Furthermore, the first engaging portion 172 and the second engaging portion 173 are separately provided on the fuel tank 19 along the moving direction Y3 of the fuel tank 19. Specifically, the first engaging portion 172 is provided on the right side of the tank body 19A (fuel tank 19), and the second engaging portion 173 is provided on the left side of the tank body 19A (fuel tank 19).

[0389] like Figure 41 As shown, the first engaging portion 172 engages (fits) with the engaging portion 171 when the fuel tank 19 is in the set position S1, thereby restricting the movement of the fuel tank 19 in the pull-out direction Y2 and the push-in direction Y1. Additionally, as... Figure 44 As shown, the second engaging part 173 engages (fits) with the engaging part 171 when the fuel tank 19 is in the pulled-out position S2, thereby restricting the movement of the fuel tank 19 in the pull-out direction Y2 and the push-in direction Y1.

[0390] like Figure 48 As shown, the first engaging portion 172 and the second engaging portion 173 are provided at the front and rear of the fuel tank 19, respectively, corresponding to the front and rear pairs of engaging portions 171.

[0391] like Figure 51 As shown, the recesses constituting the first engaging portion 172 and the second engaging portion 173 are recessed upwards and are formed into a triangular shape with a top when viewed from the side.

[0392] The first engaging portion 172 has a first limiting surface 172A and a first guiding surface 172B. When the fuel tank 19 is in the set position S1, the first limiting surface 172A abuts against the engaging portion 171 on the front side in the pull-out direction Y2, thus limiting the movement of the fuel tank 19 in the push-in direction Y1. The first limiting surface 172A is formed in an inclined shape that shifts downwards towards the pull-out direction Y2. When the fuel tank 19 is in the set position S1, the first guiding surface 172B abuts against the engaging portion 171 on the rear side in the pull-out direction Y2, thus limiting the movement of the fuel tank 19 in the pull-out direction Y2. The first guiding surface 172B is formed in an inclined shape that shifts downwards from the recessed top 172C towards the push-in direction Y1. The first guiding surface 172B has an inclination angle that is gentler than the inclination angle of the first limiting surface 172A.

[0393] The second engaging portion 173 has a second limiting surface 173A and a second guiding surface 173B. When the fuel tank 19 is in the pulled-out position S2, the second limiting surface 173A abuts against the engaging portion 171 on the front side in the pushing direction Y1, thus restricting the movement of the fuel tank 19 in the pulled-out direction Y2. The second limiting surface 173A is formed in an inclined shape that shifts downwards towards the pushing direction Y1. When the fuel tank 19 is in the pulled-out position S2, the second guiding surface 173B abuts against the engaging portion 171 on the rear side in the pushing direction Y1, thus restricting the movement of the fuel tank 19 in the pushing direction Y1. The second guiding surface 173B is formed in an inclined shape that shifts downwards from the recessed top 173C towards the pulled-out direction Y2. The second guiding surface 173B is formed at an inclination angle that is gentler than the inclination angle of the second limiting surface 173A.

[0394] Furthermore, the first limiting surface 172A and the second limiting surface 173A can also be formed by extending in the vertical direction.

[0395] When the fuel tank 19 is moved from the set position S1 to the pull-out position S2, the engaging part 171 is guided by the first guide surface 172B to smoothly disengage from the first engaged part 172, and is guided by the second guide surface 173B to smoothly engage with the second engaged part 173. The engaging part 171 abuts against the second limiting surface 173A to position and fix the fuel tank 19 in the pull-out position S2.

[0396] When the fuel tank 19 is moved from the pulled-out position S2 to the set position S1, the engaging part 171 is guided by the second guide surface 173B to smoothly disengage from the second engaged part 173, and is guided by the first guide surface 172B to smoothly engage with the first engaged part 172. Furthermore, the engaging part 171 abuts against the first limiting surface 172A, thereby positioning and fixing the fuel tank 19 in the set position S1.

[0397] Furthermore, the engaging portion 171 may also be formed from a rod (round rod). Alternatively, the engaging portion 171 may be formed as a recess, and the first engaging portion 172 and the second engaging portion 173 may be formed as protrusions that fit into the engaging portion 171.

[0398] Next, the third fixing device 180A and the fourth fixing device 180B will be described in summary.

[0399] like Figure 41 , Figure 44As shown, the third fixing device 180A is a device for fixing the fuel tank 19 to the set position S1 and the pull-out position S2 on the rear side of the fuel tank 19. It includes: a support member 181, which is integrally and movably mounted on the fuel tank 19; a support mounting part (first fixing part) 182Ba and a boss member (second fixing part) 184, which are separately mounted on the two sides of the body in the moving direction Y3 of the fuel tank 19; and a fixing member 189 (first fixing member), which fixes the support member 181 to the support mounting part 182Ba (first fixing part) when the fuel tank 19 is in the set position S1, and fixes the support member 181 to the boss member 184 (second fixing part) when the fuel tank 19 is in the pull-out position S2.

[0400] The fourth fixing device 180B is a device that fixes the fuel tank 19 to the setting position S1 and the pull-out position S2 on the front side of the fuel tank 19. It includes: a support member 181, which is mounted on the fuel tank 19 and can be moved integrally with the fuel tank 19; a first support member (third fixing part) 183A and a second support member (fourth fixing part) 183B, which are separately mounted on the two sides of the body in the moving direction Y3 of the fuel tank 19; and fixing members 192 (second fixing member 192A and third fixing member 192B), which fix the support member 181 to the first support member (third fixing part) 183A and the second support member (fourth fixing part) 183B when the fuel tank 19 is in the setting position S1.

[0401] The second support member (fourth fixing part) 183B is disposed relative to the first support member (third fixing part) 183A on the pull-out direction Y2 side from the setting position S1 toward the pull-out position S2.

[0402] like Figure 41 As shown, the fastener 192 includes: a second fastener 192A, which fixes the support member 181 to the third fastener 183A when the fuel tank 19 is in the set position S1; and a third fastener 192B, which fixes the support member 181 to the fourth fastener 183B when the fuel tank 19 is in the set position S1.

[0403] like Figure 44 As shown, the third fastener 192B fixes the support member 181 to the fourth fastener 183B when the fuel tank 19 is in the pulled-out position S2.

[0404] like Figure 45 , Figure 52As shown, the support member 181 has a first support 185 and a second support 186 formed of sheet metal. The first support 185 has a horizontal plate portion 185a with its surface facing vertically, and a vertical plate portion 185b extending upward from the rear end of the horizontal plate portion 185a. The second support 186 has a fixing plate portion 186a fixed to the lower surface of the front part of the horizontal plate portion 185a; a vertical plate portion 186b extending in a manner that expands downward from the front end of the fixing plate portion 186a along the width direction K2 of the machine body; and a pair of mounting plates 186c extending forward from the left and right sides of the lower end of the vertical plate portion 186b.

[0405] like Figure 45 , Figure 52 As shown, in the horizontal plate portion 185a of the first support bar 185, the through hole 187 is formed in a through shape.

[0406] like Figure 53 As shown, an elastic member 188 made of an elastic material such as rubber is provided in the portion forming the through hole 187. The elastic member 188 has a cylindrical portion 188a and a flange-shaped portion 188b extending from the cylindrical portion 188a. The cylindrical portion 188a is inserted through the through hole 187. The flange-shaped portion 188b extends radially outward from the lower part of the cylindrical portion 188a and is located between the horizontal plate portion 185a and the fuel tank 19. That is, the first support bar 185 (horizontal plate portion 185a) abuts against the upper surface of the fuel tank 19 via the elastic member 188 (flange-shaped portion 188b). A fuel inlet portion 19a protruding upward from the upper surface of the fuel tank 19 is inserted through the cylindrical portion 188a. Therefore, the support bar member 181 can move integrally with the fuel tank 19 via the fuel inlet portion 19a.

[0407] Fuel can also be replenished to the fuel tank 19 through the fuel inlet 19a. The upper part of the fuel inlet 19a is closed by the cover 19b. A receiving member 191 is provided on the first support bar 185 to surround the fuel inlet 19a.

[0408] like Figure 45 As shown, the support rod mounting portion 182Ba is formed on the upper part of the frame member 182, which is erected on the second support piece 155b of the other mounting portion 55c2. Figure 45 , Figure 52As shown, the frame member 182 includes: a support member 182A; and a plate member 182B, fixed to the front surface of the support member 182A. The plate member 182B has a strut mounting portion 182Ba at its upper part. A longitudinal plate portion 185b of a first strut 185 overlaps on the front surface of the strut mounting portion 182Ba and is fixed by a pair of left and right fasteners 189. The fasteners 189 are made of bolts. A nut 190 is fixed on the back side of the strut mounting portion 182Ba. The longitudinal plate portion 185b is installed and fixed to the strut mounting portion 182Ba by screwing the fasteners 189 through the longitudinal plate portion 185b and the strut mounting portion 182Ba.

[0409] like Figure 41 As shown, the second support bar 186 is installed on the support member 183. Specifically, the mounting plate 186c1 on the left is fixed to the upper part of the first support member 183A by a second fastener 192A, and the mounting plate 186c2 on the right is fixed to the upper part of the second support member 183B by a third fastener 192B. The fastener 192 is made of bolts.

[0410] By installing the first support bar 185 onto the support bar mounting portion 182Ba, and the second support bar 186 onto the support member 183, and the support bar member 181 onto the frame member 182 and the support member 183, the support bar member 181 (the flange-like portion of the elastic member 188) can be pressed against the fuel tank 19.

[0411] like Figure 40 As shown, the boss member 184 is mounted on a support frame 193 that supports equipment mounted on the body 2 (e.g., radiator 15, fan cover surrounding cooling fan 14, etc.).

[0412] like Figure 40 , Figure 54 As shown, the support frame 193 is mounted on the body 2. In detail, the support frame 193 has a first frame 194 and a second frame 195.

[0413] The first frame 194 has: a rear support column 194A, the lower part of which is mounted on a mounting portion 196 provided on a counterweight 33 and is erected on the mounting portion 196; a front support column 194B, the lower part of which is mounted on a mounting portion 197 fixed on a partition 34 and is erected on the mounting portion 197; and a connecting portion 194C connecting the rear support column 194A and the front support column 194B.

[0414] The second frame 195 includes: a support column 195A, the lower part of which is mounted on a support plate 137 and erected on the support plate 137; a front wall portion 195B, extending to the left from the upper part of the support column 195A; and a mounting plate 195C, extending to the right from the upper part of the support column 195A. The upper part of the front support column 194B is fixed to the back side of the front wall portion 195B.

[0415] The boss member 184 is formed from a cylindrical body with internal threads cut into its inner circumferential surface. For example... Figure 41 As shown, the boss member 184 is arranged with its axial direction aligned with the front-rear direction K1 and is fixed to the front surface and right side of the mounting plate 195C. Furthermore, the boss member 184 is fixed to the mounting plate 195C at the same height as the axis of the nut 190 screwed into the fastener 189. Additionally, the boss member 184 and the support rod mounting portion 182Ba are separately arranged in the movement direction Y3 of the fuel tank 19.

[0416] In the aforementioned third fixing device 180A and fourth fixing device 180B, the fuel tank 19 can be fixed in the setting position S1 by fixing member 189 and fixing member 192. When the fuel tank 19 is pulled out from the setting position S1 to the pulled-out position S2, fixing member 189 and fixing member 192 are removed, thereby allowing the fuel tank 19 to move in the pulling direction Y2. Figure 44 As shown, when the fuel tank 19 is moved to the pull-out position S2, the fastener 189 can be screwed into the boss member 184, and the fastener 192 can be screwed into the upper part of the second support member 183B. By screwing the fastener 189 into the boss member 184 and the fastener 192 into the upper part of the second support member 183B, the fuel tank 19 can be fixed in the pull-out position S2 and the tipping-off prevention of the fuel tank 19 can be achieved.

[0417] In this embodiment, the fuel tank 19 is fixed in the pull-out position S2 using both the third fixing device 180A and the fourth fixing device 180B. However, the fuel tank 19 can also be fixed in the pull-out position S2 using only either the third fixing device 180A or the fourth fixing device 180B.

[0418] like Figure 39 , Figure 40 , Figure 52 As shown, in the longitudinal plate portion 186b of the second support bar 186, a grease gun holder 138 is installed, which holds a grease gun 121, a tool for filling grease as a bearing or other component in the device. Figure 39 As shown, the grease gun 121 and the grease gun holder 138 are positioned above the battery 22.

[0419] In addition, the hoses connected to the fuel tank 19, such as the delivery hose 130, the drain pipe 132, and the supply pipe 133, are formed to a sufficient length to allow the fuel tank 19 to move in the pull-out direction Y2.

[0420] Next, the cooling air introduction structure that introduces cooling air into the prime mover chamber E2, which houses the prime mover E1, via the cooling unit including radiator 15, oil cooler 16 and fuel cooler 17 will be described.

[0421] First, a brief overview of the cooling air inlet structure will be provided.

[0422] like Figure 55 As shown, in addition to the prime mover E1, the prime mover compartment E2 also houses a cooling fan 14, a fan shroud 216, a hydraulic pump 25, an exhaust gas purification device 26, and an air filter 27. The fan shroud 216 covers the cooling fan 14 and guides the cooling air generated by the cooling fan 14 from the radiator 15 side toward the cooling fan 14.

[0423] The prime mover compartment E2 is composed of a partition wall 74 separating the prime mover E1 side and the driver's seat 6 side, a partition plate 34, a rotating base plate 31, a counterweight 33, and fifth covers 143E to tenth covers 143J. In addition, the fifth covers 143E to tenth covers 143J constitute the main body 201A (main body of the cover) of the cover 201 that forms the prime mover compartment E2.

[0424] like Figure 55 As shown, the radiator 15 is spaced apart from the prime mover E1 in the width direction K2. In this embodiment, the radiator 15 is spaced apart to the right of the prime mover E1. A cooling fan 14 is disposed between the radiator 15 and the prime mover E1, delivering cooling air toward the prime mover E1. The radiator (cooler) 15 and the cooling fan 14 constitute a cooling device 361. The cooling device 361 is disposed between the prime mover E1 and the shroud 201 (open / closed pipe 143D).

[0425] In this embodiment, a cooling fan 14 is arranged between the radiator (cooler) 15 and the prime mover E1, but the radiator 15 can also be arranged between the cooling fan 14 and the prime mover E1. That is, the prime mover E1, the cooling fan 14, the cooler (radiator 15), and the shroud 201 (opening and closing pipe 143D) can be arranged in the order of shroud 201 (opening and closing pipe 143D) → cooler (radiator 15) → cooling fan 14 → prime mover E1, or in the order of shroud 201 (opening and closing pipe 143D) → cooling fan 14 → cooler (radiator 15) → prime mover E1.

[0426] In this embodiment, such as Figure 55 , Figure 56As shown, the right side of the radiator 15 of the main body 201A is formed as an open portion 202 that opens to the right. The radiator 15, oil cooler 16, and fuel cooler 17 are disposed on the right side of the open portion 202 and are covered by a fourth cover (referred to as an opening / closing pipe) 143D. The opening / closing pipe 143D is a component constituting the radiator 201. That is, the radiator 201 includes the opening / closing pipe 143D.

[0427] The opening and closing pipe 143D can open and close the opening 202 (the open side of the main body 201A of the hood). That is, the cooling device 361 side of the hood 201 can be opened and closed.

[0428] Furthermore, the opening and closing duct 143D guides the outside air drawn in from the outside air inlet 125 to the radiator 15 and oil cooler 16, etc. That is, the opening and closing duct 143D closes the opening 202 on the radiator 15 side of the cover 201 and covers the radiator 15 and oil cooler 16, etc., and forms an air guide path 203 that guides the outside air drawn in by the cooling fan 14 to the oil cooler 16 and radiator 15, etc.

[0429] like Figure 21 As shown, on the side of the radiator 15 opposite to the prime mover E1 (right side), a fixed duct 261 is provided to guide the cooling air drawn by the cooling fan 14 toward the radiator 15. An external air inlet 125 is formed on the upper wall portion 143D1 at a position above the fixed duct 261.

[0430] A fixed duct 261 is provided on the side of the housing 201 (open / close duct 143D) on the side of the cooling device 361. The open / close duct 143D is provided on the side of the housing 201 on the cooling device 361 side. Moreover, by closing the housing 201 (closing the open / close duct 143D), the open / close duct 143D and the fixed duct 261 are connected. That is, the open / close duct 143D guides the outside air drawn in by the cooling fan 14 to the fixed duct 261 through the closed opening 202 of the housing 201. In other words, by closing the open / close duct 143D, outside air (cooling air) drawn in from the outside air inlet 125 by the cooling fan 14 is formed to flow through the open / close duct 143D and the fixed duct 261 to the intake duct 262 of the oil cooler 16 and the radiator 15. Furthermore, in other words, by closing the hood 201, the opening and closing pipe 143D and the fixed pipe 261 are connected, and the outside air taken in from outside the body 2 is introduced into the cooling device 361 through the opening and closing pipe 143D and the fixed pipe 261.

[0431] Next, the opening and closing pipe 143D will be described in detail.

[0432] like Figure 57 , Figure 58AAs shown, the opening / closing pipe 143D, in addition to the aforementioned upper wall portion 143D1 and outer wall portion (side wall portion) 143D2, also includes a partition member 143D3 and a sealing material 204. Specifically, the housing 201 has: an outer wall portion (side wall portion) 143D2 disposed to the side of the cooling device 361; and an upper wall portion 143D1 connected to the upper part of the outer wall portion 143D2. Furthermore, the opening / closing pipe 143D is formed spanning the outer wall portion (side wall portion) 143D2 and the upper wall portion 143D1, guiding external air taken in from the external air inlet 125 downwards along the outer wall portion (side wall portion) 143D2, and allowing it to flow into a fixed pipe 261 connected to the inside of the opening / closing pipe 143D in the width direction K2 of the housing.

[0433] like Figure 55 As shown, the upper wall portion 143D1 is formed in a sloping shape that shifts downwards towards the right and curves upwards when viewed from the rear. The external air inlet portion 125 is located to the right of the radiator 15 and the oil cooler 16.

[0434] like Figure 38 , Figure 58A As shown, in this embodiment, the external air inlet 125 is constructed by vertically arranging three segments of an opening row 125A, in which a plurality of small openings 125a facing to the right are formed side by side in the front-rear direction K1. Furthermore, the external air inlet 125 is formed in a louvered shape.

[0435] like Figure 57 , Figure 58A As shown, a pair of front and rear mounting supports 205A and 205B and a pair of front and rear cylindrical bosses 206A and 206B are provided on the lower surface of the upper wall portion 143D1. The pair of mounting supports 205A and 205B are located on the right side of the upper wall portion 143D1, and the pair of cylindrical bosses 206A and 206B are located on the left side of the upper wall portion 143D1.

[0436] like Figure 55 As shown, the outer wall portion 143D2 is located on the side of the radiator 15 opposite to the prime mover E1 (right side). In other words, the outer wall portion 143D2 is located on the side of the fixed pipe 261 opposite to the radiator 15. Furthermore, as... Figure 70 As shown, the outer wall portion 143D2 is formed in a curved shape that protrudes outward when viewed from above, covering the radiator 15, oil cooler 16, and fuel cooler 17 from right to rear. Figure 57 , Figure 58A As shown, a hinge mounting portion 208 is provided on the front part of the inner surface of the outer wall portion 143D2. (As indicated...) Figure 56As shown, a hinge 207 is disposed at the rear of the third cover 143C, and a hinge mounting part 208 is installed on the hinge 207. As a result, the opening and closing pipe 143D rotates forward about an axis extending in the vertical direction to open.

[0437] like Figure 58A As shown, on the inner surface of the outer wall portion 143D2, there are a pair of first mounting brackets 209A and 209B (front and rear), a pair of second mounting brackets 210A and 210B (front and rear), and a pair of third mounting brackets 211A and 211B (front and rear). The pair of first mounting brackets 209A and 209B and the pair of second mounting brackets 210A and 210B are located at the upper part of the outer wall portion 143D2. The first mounting brackets 209A and 209B are located above the second mounting brackets 210A and 210B. The pair of third mounting brackets 211A and 211B are located at the lower part of the outer wall portion 143D2.

[0438] like Figure 57 As shown, the front mounting support 205A is bolted to the front first mounting bracket 209A, and the rear mounting support 205B is bolted to the rear first mounting bracket 209B.

[0439] like Figure 55 As shown, the partition member 143D3 is positioned to the right of the radiator 15 and the oil cooler 16, separating the outer wall portion 143D2 from the fixed pipe 261 (radiator 15) on the side of the external air inlet portion 125 closest to the radiator 15.

[0440] like Figure 59 As shown, the partition member 143D3 has a main body portion 212 and a frame portion 213. (As...) Figure 58A , Figure 59 As shown, the main body 212 has a lower part 214 and an upper part 215.

[0441] like Figure 55 As shown, the lower part 214 of the main body is positioned corresponding to the heat sink 15. The upper part 215 of the main body extends upward from the upper part of the lower part 214 and extends to the vicinity of the upper wall part 143D1.

[0442] like Figure 58A , Figure 59 As shown, the lower part 214 of the main body has a front wall 214a, an upper wall 214b, and a lower wall 214c, forming a U-shape with the rear open when viewed from the side. The front wall 214a extends vertically with its surface facing forward and backward in the direction K1. The upper wall 214b extends rearward from the upper left part of the front wall 214a with its surface facing the width direction K2. The lower wall 214c extends rearward from the lower end of the front wall 214a with its surface facing vertically.

[0443] like Figure 58A As shown, a first mounting piece 217 is provided on the upper and right side of the front surface of the front wall 214a. (As indicated...) Figure 57 As shown, the first mounting piece 217 is bolted to the second mounting bracket 210A on the outer wall portion 143D2. (As indicated...) Figure 28 As shown, the right edge of the front wall 214a is located near the inner surface of the outer wall portion 143D2.

[0444] like Figure 58A , Figure 59 As shown, at the lower end of the upper wall 214b, a pair of second mounting pieces 218A and 218B are formed in a downward protruding shape. On the left side of the upper wall 214b, a protruding wall (first protruding wall) 226 protruding to the left is formed in a manner extending in the front-rear direction K1. The first protruding wall 226 is located above the second mounting pieces 218A and 218B.

[0445] like Figure 58A , Figure 59 As shown, on the upper surface of the lower wall 214c, a protruding wall (second protruding wall) 224 is formed protruding upwards, extending in the front-rear direction K1. A pair of third mounting pieces 219A and 219B protrude upwards from the protruding wall 224. On the lower surface of the lower wall 214c, a pair of fourth mounting pieces 220A and 220B protrude downwards. Figure 57 As shown, the fourth mounting plate 220A on the front side is fixed to the third mounting bracket 211A on the front side by bolts, and the fourth mounting plate 220B on the rear side is fixed to the third mounting bracket 211B on the rear side by bolts. Figure 63 As shown, the right edge of the lower wall 214c is located near the outer wall portion 143D2.

[0446] like Figure 58A As shown, the upper part 215 of the main body has a front wall 215a and a side wall 215b.

[0447] like Figure 57 As shown, the front wall 215a extends upward from the upper end of the front wall 214a of the lower part of the main body 214 and extends to the vicinity of the lower surface of the upper wall 143D1.

[0448] like Figure 63 As shown, the sidewall 215b extends in an inclined direction from the upper end of the upper wall 214b of the lower part of the main body 214 upwards and to the left, and the upper part extends upwards from the lower end of the lower part and extends to the vicinity of the lower surface of the upper wall 143D1.

[0449] like Figure 58AAs shown, a pair of fifth mounting pieces 227A and 227B and a mounting portion 228 are provided on the upper part 215 of the main body. The front fifth mounting piece 227A is provided on the upper part of the front surface of the front wall 215a. The rear fifth mounting piece 227B is provided on the upper part and rear part of the left surface of the side wall 215b. The mounting portion 228 is provided on the lower part and rear part of the left surface of the side wall 215b.

[0450] like Figure 57 As shown, the fifth mounting piece 227A on the front side is fixed to the cylindrical boss 206A on the front side of the upper wall portion 143D1 by bolts, and the fifth mounting piece 227B on the rear side is fixed to the cylindrical boss 206B on the rear side by bolts. The mounting part 228 is fixed to the second mounting bracket 210B on the outer wall portion 143D2 by bolts.

[0451] like Figure 59 , Figure 64 As shown, the frame portion 213 has a frame body 229, a locking plate 230, a mounting plate 231, a first mounting member 232, a second mounting member 233, and a third mounting member 234.

[0452] The frame body 229 has: a first frame portion 229a at the top; a second frame portion 229b spaced apart below the first frame portion 229a; a third frame portion 229c connecting the front portions of the first frame portion 229a and the second frame portion 229b; and a fourth frame portion 229d connecting the rear portions of the first frame portion 229a and the second frame portion 229b, which is rectangular in shape when viewed from the side. Therefore, a rectangular opening 235 is formed on the inner side of the frame body 229. Figure 62 , Figure 63 As shown, the opening 235 is formed at a position corresponding to the radiator 15 (cooling device 361). Furthermore, the opening 235 communicates with the fixed pipe 261, allowing external air (cooling air) drawn from the external air inlet 125 into the open / closed pipe 143D to pass through. That is, the partition member 143D3 has an opening 235 formed at a position corresponding to the radiator 15, allowing external air to flow to the radiator 15 side.

[0453] like Figure 64 As shown, a pair of nuts 236A and 236B are fixed to the left surface of the first frame portion 229a. The first frame portion 229a is fixed to the main body portion 212 by bolts 240A that screw into the nut 236A through the second mounting plate 218A of the main body portion 212 and the first frame portion 229a, and bolts 240B that screw into the nut 236B through the second mounting plate 218B of the main body portion 212 and the first frame portion 229a (see reference). Figure 57 , Figure 59 as well as Figure 61 ).

[0454] likeFigure 64 As shown, a through hole 238 is formed approximately at the center of the front-rear direction K1 of the first frame portion 229a. (As shown...) Figure 61 As shown, a nut 239 is fixed on the right surface of the first frame portion 229a at a position corresponding to the through hole 238.

[0455] like Figure 64 As shown, multiple upward-facing hooks 237 are fixed on the left surfaces of the third frame portion 229c and the fourth frame portion 229d. A pair of hooks 237 are provided vertically on the third frame portion 229c, and a pair of hooks 237 are also provided vertically on the fourth frame portion 229d.

[0456] like Figure 65 As shown, the locking plate 230 has: a lower wall 230a with its surface facing vertically; and a locking wall 230b extending upward from the left end of the lower wall 230a. The left end of the lower wall 230a is fixed to the lower end of the frame body 229 and protrudes to the right from the lower end of the frame body 229. Furthermore, the left end of the lower wall 230a protrudes slightly to the left from the lower end of the frame body 229. The locking wall 230b is formed such that its lower part extends vertically and its upper part extends in an inclined direction that shifts to the left as it moves upward. The gap between the lower part of the locking wall 230b and the second frame portion 229b is formed to allow insertion and retention of the lower end of the insect net 257 (described later). The upper part of the locking wall 230b functions as a guide when the lower end of the insect net 257 is inserted between the lower part of the locking wall 230b and the second frame portion 229b.

[0457] like Figure 65 As shown, the mounting plate 231 is configured with its surface facing the width direction K2 of the machine body, and its lower end is fixed to the right end of the lower wall 230a of the locking plate 230. Figure 64 As shown, a pair of nuts 241A and 241B are fixed on the left surface of the mounting plate 231. The mounting plate 231 is fixed to the main body 212 by bolts 242A that screw into the nut 241A through the third mounting piece 219A of the main body 212 and the mounting plate 231, and bolts 242B that screw into the nut 241B through the third mounting piece 219B of the main body 212 and the mounting plate 231.

[0458] like Figure 60 , Figure 62 As shown, the first mounting member 232, the second mounting member 233, and the third mounting member 234 are formed of sheet metal. The first mounting member 232 is positioned with its plate surface facing the width direction K2 of the machine body, and its left end is fixed to the rear end of the fourth frame portion 229d by welding or the like, protruding in a square shape from the fourth frame portion 229d to the right. Figure 62 As shown, the right end of the first mounting member 232 is located near the outer wall portion 143D2.

[0459] like Figure 64 As shown, the second mounting member 233 is configured with its plate facing up and down, and is fixed to the upper end of the first mounting member 232 by welding or the like.

[0460] like Figure 59 , Figure 61 As shown, the third mounting member 234 is configured with its plate facing the front-rear direction K1 and is fixed to the rear end side of the right surface of the third frame 229c by welding or the like.

[0461] like Figure 58A , Figure 64 As shown, the sealing material 204 includes a first seal 243, a second seal 244, a third seal 245, a fourth seal 246, a fifth seal 247, a sixth seal 248, a seventh seal 249, and an eighth seal 250.

[0462] like Figure 58A , Figure 58B As shown, the first seal 243 has: a first portion 243a extending in a vertical direction; a second portion 243b extending rearward from the upper end of the first portion 243a; and a third portion 243c extending rearward from the lower end of the first portion 243a, forming a U-shape that opens rearward when viewed from the side. The first seal 243 is installed on the left side of the lower part 214 of the main body of the partition member 143D3. Specifically, the left edge of the front wall 214a forms the first seal mounting portion 221, the left edge of the first protruding wall 226 forms the second seal mounting portion 222, and the left edge of the lower wall 214c forms the third seal mounting portion 223. The first portion 243a is installed on the first seal mounting portion 221, the second portion 243b is installed on the second seal mounting portion 222, and the third portion 243c is installed on the third seal mounting portion 223. Therefore, the first seal 243 surrounds the three sides of the opening 235.

[0463] like Figure 58B As shown, the third sealing mounting portion 223 has: an inclined first portion 223a that shifts to the right as it moves rearward from the lower end of the first sealing mounting portion 221; and a second portion 223b that extends rearward from the rear end of the first portion 223a. The second portion 223b is located to the right of the second sealing mounting portion 222 (see reference). Figure 63 The third portion 243c of the first seal 243 is formed in a shape corresponding to the shape of the third seal mounting portion 223. That is, the third portion 243c has: a front portion 243c1 mounted on the first portion 223a of the first seal mounting portion 221; and a rear portion 243c2 mounted on the second portion 223b of the first seal mounting portion 221.

[0464] like Figure 58AAs shown, the second seal 244 has: a first portion 244a extending in a vertical direction; and a second portion 244b extending rearward from the lower end of the first portion 244a. The second seal 244 is mounted on the right side of the lower part 214 of the main body of the partition member 143D3. Specifically, the right edge of the front wall 214a of the lower part 214 is formed as a fourth seal mounting portion 251, and the right edge of the lower wall 214c of the lower part 214 is formed as a fifth seal mounting portion 252. Figure 62 As shown, a first portion 244a of a second seal 244 is installed on the fourth sealing mounting portion 251, and this first portion 244a abuts against the outer wall portion 143D2. Figure 63 As shown, a second part 244b of the second seal 244 is installed in the fifth sealing mounting part 252, and the second part 244b abuts against the outer wall part 143D2.

[0465] like Figure 58A As shown, the third seal 245 and the fourth seal 246 are mounted on the upper part 215 of the main body of the partition member 143D3. Specifically, the upper edge of the front wall 215a of the upper part 215 is formed as the sixth seal mounting part 255, and the upper edge of the side wall 215b of the upper part 215 is formed as the seventh seal mounting part 256. Figure 57 As shown, a third seal 245 is installed in the sixth sealing mounting portion 255, and this third seal 245 abuts against the lower surface of the upper wall portion 143D1. Figure 57 , Figure 63 As shown, a fourth seal 246 is installed in the seventh sealing mounting part 256, and the fourth seal 246 abuts against the lower surface of the upper wall part 143D1.

[0466] like Figure 64 As shown, the right edge of the first mounting member 232 of the frame portion 213 is formed as the eighth sealing mounting portion 253. Figure 62 As shown, a fifth seal 247 is installed in the eighth sealing mounting part 253, and the fifth seal 247 abuts against the outer wall part 143D2.

[0467] like Figure 61 , Figure 64 As shown, the sixth seal 248 is installed on the second mounting member 233. (As indicated...) Figure 57 , Figure 60 As shown, the sixth seal 248 abuts against the outer wall portion 143D2.

[0468] like Figure 61 As shown, the seventh seal 249 is located between the third mounting member 234 and the front wall 214a of the lower part 214 of the main body of the partition member 143D3, is mounted on the third mounting member 234, and abuts against the rear surface of the front wall 214a.

[0469] likeFigure 57 , Figure 65 As shown, the eighth seal 250 is located between the rear part of the lower wall 230a of the locking plate 230 and the third part 243c of the first seal 243, and seals the gap between the rear end of the second protruding wall 224 and the lower part of the first mounting member 232.

[0470] As described above, an air guide path 203 is formed by the upper wall portion 143D1, the outer wall portion 143D2, and the partition member 143D3, which guides the external air taken in from the external air inlet portion 125 to the opening portion 235.

[0471] like Figure 57 , Figure 60 As shown, an insect screen (dust screen) 257 with a closed opening 235 is installed on the frame portion 213. The insect screen 257 is located near the connection between the fixed pipe 261 and the open / closed pipe 143D, and is a dust screen that captures dust contained in the outside air flowing from the open / closed pipe 143D to the fixed pipe 261.

[0472] like Figure 59 , Figure 66 As shown, the insect net 257 has a net 258, a first mesh frame 259, and a second mesh frame 260. The net 258 is a mesh sheet that is breathable and prevents insects from passing through, and is formed into a (closed) shape corresponding to the opening 235. The insect net 257 is formed by clamping the net 258 with the first mesh frame 259 and the second mesh frame 260, and connecting the first mesh frame 259 and the second mesh frame 260 to each other. The first mesh frame 259 and the second mesh frame 260 are formed into substantially the same shape, and have an opening 257a corresponding to the opening 235. In the upper frame portion 257b of the insect net 257 (first mesh frame 259, second mesh frame 260), an upwardly protruding portion 257c is formed, and in the protruding portion 257c, a through hole 257d is formed that spans across the first mesh frame 259 and the second mesh frame 260. In the longitudinal frame portion 257g of the insect-proof net 257 (first net frame 259, second net frame 260), a hook 237 of the frame body 229 is formed, which can be inserted through along the width direction K2 of the body and has an insertion hole 257e that is longer in the vertical direction. In the upper frame portion 257b of the first net frame 259, a handle 257f is provided.

[0473] To install the insect-proof net 257 onto the frame 213, the following method shall be used.

[0474] First, position the insect net 257 to the left (near the front) of the frame portion 213. Next, move the insect net 257 to the right (towards the frame portion 213) so that the hook 237 is inserted into the insertion hole 257e. Then, slide the insect net 257 downwards so that its lower end is inserted between the lower part of the locking wall 230b and the second frame portion 229b. At this time, the upper edge of the insertion hole 257e engages with the hook 237, restricting the downward movement of the insect net 257 and also restricting its leftward movement (movement away from the frame portion 213).

[0475] In this way, the insect net 257 is held in place by multiple hooks 237, and the lower end of the insect net 257 is held between the lower part of the locking wall 230b and the second frame portion 229b. That is, the insect net 257 is held on the frame portion 213. Next, the fastener (wing bolt) 263 is inserted into the through hole 257d and the insertion hole 238 of the first frame portion 229a, and screwed into the nut 239. Thus, the insect net 257 is detachably fixed.

[0476] When disassembling the insect net 257, the insect net 257 can be easily removed by removing the fastener 263 and slightly lifting and moving the insect net 257 closer to the front.

[0477] In addition, the insect net 257 can also be installed on the fixed pipe 261. That is, the insect net (dust net) 257 can be installed and removed relative to the fixed pipe 261 or the opening and closing pipe 143D by opening the cover 201.

[0478] In the aforementioned opening and closing pipe 143D, no opening is formed in the outer wall portion 143D2, and an external air inlet portion 125 is formed at a position higher than the prime mover E1 and the radiator 15. Therefore, the noise inside the shroud 201 (the noise of the prime mover E1, the cooling fan 14, etc.) will not leak directly to the outside from the outer wall portion 143D2, and the noise inside the shroud 201 can be suppressed (reduced) from leaking to the outside.

[0479] Furthermore, since the insect screen 257 is installed on the frame portion 213 from the mating surface (outer side) of the opening / closing pipe 143D and the cover 201, the insect screen 257 can be easily removed by opening the opening / closing pipe 143D. Additionally, the installation of the insect screen 257 is also easy. Furthermore, partitions created using the insect screen 257 can be easily achieved.

[0480] Furthermore, when cleaning or performing tasks such as removing the insect screen 257, the opening and closing pipe 143D is open. Therefore, when removing the insect screen 257, insects, dust, etc., captured by the insect screen 257 will fall to the outside of the machine body 2, making cleaning operations easy.

[0481] Next, the fixed pipe 261 will be described.

[0482] like Figure 67 As shown, the lower part of the fan shroud 216 is supported by a sealing material on a support platform 254 fixed to the rotating base plate 31, and is fixed to the first frame 194 of the support frame 193 by bolts or the like. The radiator 15 is supported by a mounting platform 265 fixed to the support platform 254 by bolts or the like, and is also fixed to the fan shroud 216 by bolts or the like. A mounting frame 266 for mounting an oil cooler 16 is installed on the radiator 15, and a fixing pipe 261 is installed on the mounting frame 266.

[0483] like Figure 69 As shown, the mounting frame 266 includes: an upper frame member 266A; a lower frame member 266B disposed below the upper frame member 266A at a distance; a front frame member 266C connecting the front portions of the upper frame member 266A and the lower frame member 266B to each other; and a rear frame member 266D connecting the rear portions of the upper frame member 266A and the lower frame member 266B to each other.

[0484] The upper frame component 266A is provided with a pair of front and rear radiator mounting parts 267A and 267B, a pair of front and rear oil cooler mounting parts 268A and 268B, and a first pipe mounting part 269A.

[0485] like Figure 68 As shown, a pair of frame mounting portions 270A and 270B are provided on the upper part of the radiator 15. The front radiator mounting portion 267A is mounted on the front frame mounting portion 270A, and the rear radiator mounting portion 267B is mounted on the rear frame mounting portion 270B. The upper part of the oil cooler 16 is fixed by bolts or the like at a pair of oil cooler mounting portions 268A and 268B. The first pipe mounting portion 269A is configured to have a bolt insertion hole 269a and a nut member 269b fixed to the lower surface of the upper frame member 266A at a position corresponding to the bolt insertion hole 269a.

[0486] The lower frame member 266B is fixed with a pair of front and rear insert pins 271A and 271B, a pair of front and rear oil cooler mounting parts 272A and 272B, and a second pipe mounting part 269B. The pair of front and rear insert pins 271A and 271B are inserted into the vibration damping member (not shown) provided on the mounting platform 265. That is, the lower frame member 266B is vibration damped and supported on the mounting platform 265. The lower part of the oil cooler 16 is fixed to the pair of oil cooler mounting parts 272A and 272B by bolts or the like.

[0487] In the front frame component 266C, a third pipe mounting part 269C is fixed at the upper part, and a fourth pipe mounting part 269D is fixed at the lower part.

[0488] The rear frame member 266D is fixed with a pair of fuel cooler mounting parts 273A and 273B, on the lower part of which the fuel cooler 17 is mounted.

[0489] like Figure 67-70 As shown, the fixed conduit 261 is formed of sheet metal. The fixed conduit 261 is configured to have: a first conduit component 276 extending in the vertical direction at its front; a second conduit component 277 extending rearward from the upper part of the first conduit component 276; a third conduit component 278 extending rearward from the lower part of the first conduit component 276; a fourth conduit component 279 provided so as to extend upward from the rear end of the third conduit component 278; and a sealing material 280.

[0490] The first pipe assembly 276 includes: a longitudinal plate portion 276a extending vertically with its surface facing the width direction K2 of the machine body; and an extension plate portion 276b extending to the left from the front end of the longitudinal plate portion 276a. The right surface of the longitudinal plate portion 276a is formed as a first sealing contact surface 282 that abuts against the first portion 243a of the first seal 243. The extension plate portion 276b has a first fixing portion 281a at its upper part and a second fixing portion 281b at its lower part. The first fixing portion 281a is fixed to the third pipe mounting portion 269C by bolts or the like, and the second fixing portion 281b is fixed to the fourth pipe mounting portion 269D by bolts or the like.

[0491] The second pipe assembly 277 includes: a longitudinal plate portion 277a extending in the front-rear direction K1 with its surface facing the width direction K2 of the machine body; and a transverse plate portion 277b extending to the left from the lower end of the longitudinal plate portion 277a. The right surface of the longitudinal plate portion 277a is formed as a second sealing contact surface 283 that abuts against the second portion 243b of the first seal 243. The transverse plate portion 277b has a third fixing portion 281c at its rear end that is fixed to the first pipe mounting portion 269A by bolts or the like.

[0492] The third pipe component 278 includes: a first longitudinal plate portion 278a extending in the front-rear direction K1 with its plate surface facing the width direction K2 of the machine body; a second longitudinal plate portion 278b extending to the left from the rear end of the first longitudinal plate portion 278a with its plate surface facing the front-rear direction K1; a third longitudinal plate portion 278c extending rearward from the left end of the second longitudinal plate portion 278b with its plate surface facing the width direction K2 of the machine body; an upper plate portion 278d extending to the left from the upper ends of the first longitudinal plate portion 278a and the third longitudinal plate portion 278c; and an extension plate portion 278e extending to the right from the lower end of the third longitudinal plate portion 278c and connected to the lower end of the second longitudinal plate portion 278b. The right surface of the first longitudinal plate portion 278a is formed as a third sealing contact surface 284 that abuts against the third portion 243c of the first seal 243. The third sealing contact surface 284 has a first portion 284a and a second portion 284b. The front part 243c1 of the third part 243c abuts against the first part 284a, and the rear part 243c2 of the third part 243c abuts against the second part 284b. The third longitudinal plate part 278c has a fourth fixing part 281d that is fixed to the second pipe mounting part 269B by bolts or the like.

[0493] The fourth pipe component 279 extends upward from the rear of the third pipe component 278 with the plate surface facing the front-rear direction K1.

[0494] like Figure 68 As shown, the fixed pipe 261 (first pipe component 276, second pipe component 277, third pipe component 278, and fourth pipe component 279) extends to the right (on the side of the open / close pipe 143D) from the radiator 15.

[0495] like Figure 69 , Figure 70 As shown, the sealing material 280 includes a tenth seal 280A, an eleventh seal 280B, and a twelfth seal 280C. The rear end edge of the transverse plate portion 277b of the second pipe component 277 is formed as a tenth seal mounting portion 288, on which the tenth seal 280A is mounted. The right end edge of the fourth pipe component 279 is formed as an eleventh seal mounting portion 289, on which the eleventh seal 280B is mounted. The right end edge of the extension plate portion 278e of the third pipe component 278 is formed as a twelfth seal mounting portion 290, on which the twelfth seal 280C is mounted.

[0496] like Figure 68 As shown, a right portion 286a of a bracket member 286 is sandwiched between the tenth seal 280A and the eleventh seal 280B. A latch eye is installed on the right portion 286a of the bracket member 286, which engages with a latch provided on the outer wall portion 143D2. Figure 72As shown, the base 286b of the bracket component 286 is fixed to the inner surface of the sixth cover 143F by welding or the like.

[0497] like Figure 68 As shown, a sealing mounting wall 291 is provided on the rear end side of the fan shroud 216, extending vertically, and located to the left of the base 286b of the bracket component 286. (See diagram) Figure 68 , Figure 72 As shown, at the rear end of the sealing mounting wall 291, a sealing material 287 is provided in a vertically extending manner to abut against the sixth cover 143F.

[0498] In the above structure, when the opening / closing pipe 143D is closed, the first seal 243 abuts against the fixed pipe 261 around the opening 235. More specifically, as... Figure 62 , Figure 73 As shown, the first portion 243a of the first seal 243 abuts against the first sealing contact surface 282 of the fixed pipe 261, as... Figure 63 , Figure 73 As shown, the second part 243b of the first seal 243 abuts against the second sealing contact surface 283 of the fixed pipe 261, as... Figure 63 , Figure 74 As shown, the third portion 243c of the first seal 243 abuts against the third sealing contact surface 284 of the fixed pipe 261. Additionally, when the opening / closing pipe 143D is closed, as... Figure 71 As shown, the tenth seal 280A, the eleventh seal 280B, and the twelfth seal 280C abut against the inner surface of the outer wall portion 143D2 of the opening and closing pipe 143D. Additionally, the rear end side of the fan shroud 216 is sealed to the sixth shroud 143F by sealing material 287.

[0499] The above sealing structure can prevent hot air in the prime mover chamber E2 from being drawn into the cooling air intake side of the radiator 15, thus enabling efficient cooling of the radiator 15, oil cooler 16 and fuel cooler 17, and improving thermal balance.

[0500] Next, the air intake structure 296 that draws air into the prime mover E1 will be described.

[0501] First, a brief overview of the intake structure 296 will be provided.

[0502] like Figure 75As shown, the intake structure 296 includes: an air filter 27; an air intake 128 for drawing in air (external air) drawn into the air filter 27; an inlet path 298 for guiding the air drawn in from the air intake 128 to the air filter 27; and an outlet path 297 for guiding air from the air filter 27 to the prime mover E1. The air intake 128 is located in the sixth cover 143F constituting the engine cover 201. Specifically, the air intake 128 is located on the left side of the sixth cover 143F.

[0503] Air filter 27 and inlet path 298 are disposed inside the hood 201 (prime mover compartment E2) and downstream of the cooling air F1 of the prime mover E1. Additionally, air filter 27 and inlet path 298 are disposed above the hydraulic pump 25. Furthermore, air filter 27 and inlet path 298 are disposed to the left of the exhaust gas purification device 26 (downstream of the cooling air F1). Specifically, the exhaust gas purification device 26 is disposed extending in the front-rear direction K1, and air filter 27 is disposed to the left of the front portion of the exhaust gas purification device 26. Inlet path 298 is disposed extending rearward from between air filter 27 and exhaust gas purification device 26 and to the sixth hood 143F.

[0504] The outlet path 297 includes: a first outlet hose 297A connected to the air filter 27; a second outlet hose 297B formed as an intake connection 299 of the prime mover E1; and a connecting pipe 297C connecting the first outlet hose 297A and the second outlet hose 297B. Air taken into the air filter 27 via the inlet path 298 is guided to the intake connection 299 via the outlet path 297 and supplied from the intake connection 299 to the intake manifold of the prime mover E1. Figure 76 As shown, the first outlet hose 297A is connected to the outlet pipe 27a of the end plate located at the front of the air filter 27.

[0505] Next, the air intake 128 and the intake path 298 will be described in detail.

[0506] like Figure 77 As shown, a rectangular opening 303 that extends in the vertical direction is formed in the sixth cover 143F. The opening 303 is formed in the portion corresponding to the air intake 128. That is, the opening 303 is formed on the left side of the sixth cover 143F and is formed to the left of the opening 127 formed in the sixth cover 143F.

[0507] like Figure 79 , Figure 81As shown, the opening 303 is formed on the front wall 304a of the recess 304 formed in the sixth cover 143F. The recess 304 is formed by recessing (recessed) the wall portion constituting the sixth cover 143F from the rear to the front. The opening 303 is formed to the right of the front wall 304a (to the right of the center of the front wall 304a in the width direction K2 of the body).

[0508] like Figure 79 , Figure 81 As shown, a plate member 305 is disposed behind the recess 304 to cover the opening 303. The plate member 305 is formed in a shape corresponding to the recess 304. The plate member 305 is disposed away from the recess 304 (sixth cover 143F). That is, the plate member 305 is disposed such that a gap 306 is formed between the outer peripheral edge 305a of the plate member 305 and the recess 304.

[0509] like Figure 81 As shown, a pair of mounting supports 314A and 314B are fixed to the plate member 305. The mounting supports 314A and 314B each have a support wall portion 314a fixed to the plate member 305 and extending forward, and a mounting wall portion 314b extending vertically from the support wall portion 314a. A nut 315 is fixed to the rear surface of the mounting wall portion 314b, and the mounting supports 314A and 314B are mounted to the air inlet box 301 (described later) by screwing in a bolt 316 to the nut 315.

[0510] like Figure 77 , Figure 82 As shown, an air intake 128 is formed on the plate member 305. The air intake 128 is formed on the plate member 305 at a location slightly to the left of the center in the width direction K2 of the plate member 305. Figure 82 As shown, the air intake 128 is formed in a louvered shape. Specifically, the air intake 128 has a through-hole 128a through which air passes, and an inclined wall 128b covering the upper part of the through-hole 128a. The through-hole 128a and the inclined wall 128b are arranged side-by-side in multiple segments in the vertical direction. Air from outside the sixth cover 143F (cover 201) is drawn in through the through-hole 128a.

[0511] In addition, the air intake 128 can also be integrally formed with the sixth cover 143F (machine cover 201).

[0512] like Figure 76 , Figure 77 As shown, the inlet path 298 includes: an air inlet box 301; and a connecting pipe 302 connecting the air inlet box 301 and the air filter 27.

[0513] like Figure 74As shown, the air intake box 301 is located on the sixth cover 143F (machine cover 201) on the side of the prime mover E1 opposite to the cooling fan 14.

[0514] like Figure 44 , Figure 45 As shown, air taken in from the air intake 128 is introduced into the air intake box 301. That is, the air intake box 301 forms an air intake chamber 307 that takes in air from the outside of the sixth cover 143F (machine cover 201).

[0515] In addition, such as Figure 75 As shown, the air intake 128 and the air inlet box 301 constitute an external air inlet 200 provided on the hood 201. The external air inlet 200 and the air filter 27 are connected by a connecting pipe 302. External air drawn into the air filter 27 is introduced into the external air inlet 200, and the external air introduced into the external air inlet 200 is drawn into the air filter 27 via the connecting pipe 302. Therefore, in other words, the intake structure 296 includes: an air filter 27; an external air inlet 200 that draws in air (external air) drawn into the air filter 27; a connecting pipe 302 that guides the air drawn in from the external air inlet 200 to the air filter 27; and an outlet path 297 that guides air from the air filter 27 to the prime mover E1.

[0516] like Figure 79 , Figure 81 As shown, the air intake box 301 has: a bottom wall 301a forming the lower surface of the air intake chamber 307; an upper wall 301b forming the upper surface of the air intake chamber 307; a first side wall 301c forming the left surface of the air intake chamber 307; a second side wall 301d forming the right surface of the air intake chamber 307; and a front wall 301e forming the front surface of the air intake chamber 307, which becomes open at the rear. Therefore, the air intake box 301 has an opening 309 that opens toward the sixth cover 143F (machine cover 201) and communicates with the air intake inlet 128.

[0517] like Figure 79 , Figure 81As shown, the air intake box 301 is provided on the sixth cover 143F by fixing the opening edge 309a (the rear end edge of the bottom wall 301a, upper wall 301b, first side wall 301c, and second side wall 301d) forming the opening 309 to the inner surface of the sixth cover 143F (machine cover 201). Furthermore, the opening 309 is opposite to the opening portion 303, and the opening edge 309a is fixed to the periphery of the opening portion 303 by welding. That is, in this embodiment, the air intake box 301 is welded and fixed to the sixth cover 143F (machine cover 201). Thus, the air intake box 301 is separated from the prime mover chamber E2, preventing hot air from the prime mover chamber E2 from being drawn into the air intake chamber 307. In other words, it prevents hot air from the prime mover chamber E2 from being drawn into the prime mover E1. Furthermore, even if the inlet path 298 is positioned downstream of the cooling air F1 of the exhaust gas purification device 26, it is possible to prevent hot air from the exhaust gas purification device 26 side from being drawn in. In addition, the air inlet box 301 can suppress the leakage of noise from the prime mover chamber E2 (noise from the prime mover E1, cooling fan 14, etc.) from the air inlet 128 to the outside.

[0518] In this embodiment, the air intake chamber 307 is connected to the air intake port 128 via the opening 309 and the orifice 303, and the air taken in from the air intake port 128 is introduced into the air intake chamber 307 via the opening 309 and the orifice 303.

[0519] Furthermore, the air inlet box 301 is not limited to being installed on the sixth cover 143F by welding. For example, the opening edge 309a can be made to abut against the periphery of the opening 303 via a sealing material, and the support member fixed to the air inlet box 301 can be bolted to the boss member fixed to the sixth cover 143F, thereby allowing the air inlet box 301 to be detachably installed on the sixth cover 143F.

[0520] like Figure 81 As shown, the bottom wall 301a has a first edge portion 301a1 and a second edge portion 301a2. The first edge portion 301a1 is an edge portion that forms part of the opening edge portion 309a, and in this embodiment, it is the rear end edge portion of the bottom wall 301a. The second edge portion 301a2 is an edge portion opposite to the first edge portion 301a1, and in this embodiment, it is the front end edge portion of the bottom wall 301a. The bottom wall 301a is formed in an inclined shape that shifts downward from the second edge portion 301a2 toward the first edge portion 301a1 (as it moves rearward).

[0521] like Figure 81As shown, a drainage section 313 is provided on the sixth cover 143F (machine cover 201) side to allow water flowing over the bottom wall 301a to pass to the outside of the sixth cover 143F (machine cover 201). In this embodiment, the drainage section 313 is formed in the gap 306 between the outer peripheral edge 305a of the plate member 305 and the recess 304, and in the gap between the lower edge 305a1 of the plate member 305 and the surrounding wall portion 304a1 (front wall 304a of the recess 304) around the opening portion 303.

[0522] In this embodiment, by forming the bottom wall 301a to slope downwards and providing a drainage section 313, when water such as car wash water or rainwater enters the air intake box 301 (air intake chamber 307) from the air intake 128, the water can be discharged to the outside of the sixth cover 143F (machine cover 201).

[0523] When the air intake 128 is integrally formed with the sixth cover 143F (machine cover 201), the through hole 128a at the lowest end of the air intake 128 can also be used as a drainage part 313.

[0524] like Figure 78 , Figure 79 As shown, the second sidewall 301d of the air inlet box 301 is fixed to the bracket member 310 fixed in the sixth cover 143F. The bracket member 310 is fitted with a latch eye that engages with a latch provided in the seventh cover 143G.

[0525] like Figure 79 , Figure 80 , Figure 81 As shown, a rectangular through-hole 311, elongated in the vertical direction, is formed on the front wall 301e of the air inlet box 301. A pair of bolt through-holes 312a and 312b are formed on the upper and lower parts of the front wall 301e, respectively. A nut (not shown) is fixed to the rear surface of the front wall 301e at a position corresponding to the bolt through-hole 312b on the right side.

[0526] like Figure 76 , Figure 77 , Figure 78 As shown, the connecting pipe 302 has: a first pipe member 317 connected to the air inlet box 301; a second pipe member 318 connected to the air filter 27; and a third pipe member 319 connecting the first pipe member 317 and the second pipe member 318.

[0527] like Figure 76 , Figure 77 , Figure 78As shown, the first pipe member 317 has an insertion portion 320, a flange portion 321, and a pipe body portion 322. The insertion portion 320, the flange portion 321, and the pipe body portion 322 are arranged sequentially in a direction from rear to front.

[0528] like Figure 79 , Figure 81 As shown, the insertion part 320 is inserted into the air inlet box 301 (air intake chamber 307) via an insertion hole 311 formed in the front wall 301e of the air inlet box 301. The insertion part 320 is positioned offset horizontally from the air intake port 128. Figure 78 , Figure 79 As shown, in this embodiment, the insertion part 320 is disposed offset to the right (in the width direction K2) from the air intake 128. However, it is not limited to this; for example, the insertion part 320 may also be disposed offset upwards from the air intake 128.

[0529] like Figure 79 , Figure 81 As shown, the insertion portion 320 has: a lower wall 320a forming the lower surface of the internal space 323 of the insertion portion 320; an upper wall 320b forming the upper surface of the internal space 323; a first side wall 320c forming the left surface of the internal space 323; a second side wall 320d forming the right surface of the internal space 323; and a rear wall 320e forming the rear surface of the internal space 323. The internal space 323 is formed in an open state at the front and communicates with the internal space 324 of the pipe body portion 322.

[0530] An intake port 325 is formed on the connection side relative to the air intake box 301, within the air intake connection pipe 302 that draws air into the air intake chamber 307. In this embodiment, the intake port 325 is formed on the wall portion (second sidewall 320d) of the insertion portion 320 in the horizontal direction (body width direction K2), away from the air intake 128. In other words, the intake port 325 is formed on the wall portion of the insertion portion 320 opposite to the air intake 128 side. That is, the intake port 325 is formed on the second sidewall 320d of the insertion portion 320. Therefore, the intake port 325 is located in the air intake chamber 307 at a position offset horizontally (or upwardly) from the air intake 128. Furthermore, the intake port 325 faces away from the air intake 128 (to the right) in the body width direction K2.

[0531] By positioning the intake 325 at a position offset horizontally (or upwardly) from the air intake 128, water such as car wash water or rainwater entering the air intake chamber 307 from the air intake 128 can be prevented from being drawn in through the intake 325. Furthermore, since the insertion portion 320 is offset to the right from the air intake 128, and the intake 325 is formed on the wall facing the right side of the insertion portion 320, water can be more reliably prevented from being drawn in through the intake 325. Additionally, by staggering the positions of the air intake 128 and the intake 325, the direct leakage of sound from the prime mover compartment E2 to the outside of the hood 201 is suppressed.

[0532] like Figure 81 As shown, the suction port 325 is formed through the second sidewall (wall portion) 320d of the insertion portion 320, and extends upward from the lower end of the second sidewall 320d to the vicinity of the upper wall 320b. Furthermore, the suction port 325 is formed in a rectangular shape that extends in the vertical direction.

[0533] like Figure 79 As shown, a cut 326 is formed on the lower wall 320a of the insertion portion 320. The cut 326 is formed in a manner that communicates with the lower end of the suction port 325. That is, the suction port 325 and the cut 326 are formed continuously. By providing the cut 326, condensed water can be drained if condensation occurs inside the insertion portion 320.

[0534] like Figure 76 , Figure 77 As shown, the flange portion 321 extends outward from the first pipe member 317. Figure 76 As shown, a pair of bolt insertion holes 321a and 321b are formed on the upper and lower parts of the flange portion 321. Figure 81 As shown, bolt through holes 321a and 312a are aligned, and bolt through holes 321b and 312b are aligned. The flange 321 is fixed to the front wall 301e of the air inlet box 301 by bolts 316. Bolts 316, which pass through the bolt through holes 321b and 312b on the right side, are screwed into nuts fixed to the rear surface of the front wall 301e. Bolts 316, which pass through the bolt through holes 321a and 312a on the left side, are screwed into nuts 315 fixed to the rear surface of the mounting wall portion 314b of the mounting supports 314A and 314B. When removing the plate member 305, the bolts 316 screwed into the nuts 315 are removed. Thus, the plate member 305 can be removed while the first pipe member 317 is connected to the air inlet box 301. The disassembly plate component 305 can be configured, for example, to be performed by opening the eighth cover 143H or the seventh cover 143G.

[0535] At the rear of the first pipe member 317, a connecting pipe section 317a is provided that is connected to the third pipe member 319.

[0536] The second pipe member 318 has a connecting pipe section 318a at its front end that connects to the inlet pipe 27b of the air filter 27, and a connecting pipe section 318b at its rear end that connects to the third pipe member 319. The second pipe member 318 is throttled midway between the connecting pipe section 318b and the connecting pipe section 318a.

[0537] The first pipe component 317 and the second pipe component 318 are formed of rigid material.

[0538] The third pipe component 319 is formed of an elastic component such as rubber. By forming the third pipe component 319 with an elastic component, assembly errors of the first pipe component 317 and the second pipe component 318 can be absorbed. That is, as... Figure 83 As shown, the air filter 27 is mounted on a mounting bracket 327 installed in the working oil tank 28. On the other hand, the air inlet box 301 is fixed to the hood 201. Therefore, assembly errors may occur in the first pipe member 317 and the second pipe member 318, but these assembly errors can be absorbed by the third pipe member 319 formed by the elastic member.

[0539] The third conduit member 319 is throttled on the front side (near the connection portion relative to the second conduit member 318).

[0540] In the connecting pipe 302, the flow rate of the drawn air is not increased from the first pipe member 317 to the second pipe member 318, but the flow rate of the drawn air is increased from the front of the third pipe member 319 to the inlet pipe 27b of the air filter 27, so that the air is smoothly drawn into the air filter 27.

[0541] Next, the exhaust structure 331 that discharges the exhaust gas from the prime mover E1 to the outside of the prime mover chamber E2 will be described.

[0542] like Figure 84 As shown, the rotating base plate 31 is provided with multiple discharge sections 333A, 333B, and 333C for discharging the cooling air F1 after cooling the prime mover E1 to the outside of the machine body 2. Each discharge section 333A, 333B, and 333C connects the interior and exterior of the prime mover chamber E2 at the bottom (lower end side) of the machine body 2. Each discharge section 333A, 333B, and 333C is constructed by forming multiple holes along the front-rear direction K1 and the width direction K2 of the machine body on the plate mounted on the rotating base plate 31. The discharge sections 333A, 333B, and 333C are located at the rear and left side of the rotating base plate 31 (lower end side of the machine body 2 and downstream side of the cooling air from the prime mover E1).

[0543] like Figure 75 As shown, the cooling fan 14 delivers cooling air F1 from one side to the other in the width direction K2 of the machine body. In this embodiment, the cooling fan 14 delivers cooling air F1 from right to left.

[0544] Cooling air F1 (refer to) is directed from cooling fan 14 toward prime mover E1. Figure 75 The gas is discharged downwards from the machine body 2 through the area around the prime mover E1 (above, below, in front of, and behind the prime mover E1) and through the discharge sections 333A, 333B, and 333C formed on the rotating base plate 31. The discharge section (second discharge section) 333A is also a discharge section that discharges the mixed gas formed by mixing the exhaust gas discharged from the exhaust gas purification device 26 with the cooling air F1.

[0545] like Figure 38 , Figure 84 As shown, a discharge section (first discharge section) 334, connecting the interior and exterior of the prime mover chamber E2, is provided on the left side of the counterweight 33 constituting the rear of the machine body 2, also on the lower end side of the machine body 2. The discharge section 334 is a discharge section that discharges a mixture of exhaust gas discharged from the exhaust gas purification device 26 and cooling air F1. The discharge section 334 is formed by cutting off the counterweight 33 from its lower surface upwards.

[0546] like Figure 84 As shown, the exhaust structure 331 is located inside the prime mover compartment E2 and includes an exhaust gas purification device 26, an exhaust pipe 336, and a rectifier plate device 332.

[0547] The exhaust gas purification device 26 has an exhaust inlet 26A located at the front and an exhaust outlet 26B located at the rear. The exhaust inlet 26A is the portion that takes in the exhaust gas discharged from the prime mover E1. The exhaust outlet 26B is the portion that discharges the purified exhaust gas (purified gas). The exhaust outlet 26B extends downward from the lower surface of the rear end side of the exhaust gas purification device 26 and faces downward.

[0548] like Figure 86 As shown, the exhaust pipe 336 is positioned below the exhaust outlet 26B and is engaged with the flange of the exhaust outlet 26B via the flange 26C on the exhaust outlet 26B side and the flange 336A on the exhaust pipe 336 side.

[0549] like Figure 87 , Figure 89As shown, the exhaust pipe 336 has a first pipe portion 336a and a second pipe portion 336b. The first pipe portion 336a extends vertically downward from the flange 336A. The second pipe portion 336b extends downstream of the first pipe portion 336a towards the cooling air F1. The exhaust pipe 336 is disposed in a space within the prime mover chamber E2 that is not separated from the space where the prime mover E1 is disposed. Therefore, the exhaust pipe 336 discharges the exhaust gas from the exhaust gas purification device 26 into the internal space of the prime mover chamber E2 (the space within the prime mover chamber E2 that is not separated from the space where the prime mover E1 is disposed). More specifically, as... Figure 89 As shown, the second tube 336b is inclined downwards as it moves to the left, and as... Figure 90 As shown, it is inclined as it moves to the left and then backward. The exhaust pipe 336 discharges the exhaust gas from the exhaust gas purification device 26 from the upstream side to the downstream side of the cooling air F1.

[0550] The exhaust gas from the prime mover E1 is purified by the exhaust gas purification device 26, becoming clean. Therefore, in the machine 1 of this embodiment, the exhaust gas discharged from the exhaust gas purification device 26 via the exhaust pipe 336 is discharged into the internal space of the prime mover chamber E2. However, the exhaust gas discharged from the exhaust gas purification device 26 becomes high-temperature during purification. In addition, the exhaust pipe 336 is separated from the discharge sections 333A and 334 (there is a distance). If the exhaust gas discharged from the exhaust pipe 336 is discharged into the internal space of the prime mover chamber E2, it may cause heat-related effects on the prime mover E1, hydraulic pump 25, etc. Therefore, in this embodiment, in order to prevent the exhaust gas discharged from the exhaust pipe 336 from contacting the prime mover E1, hydraulic pump 25, etc., the rectifier plate device 332 guides the exhaust gas discharged from the exhaust pipe 336 relative to the discharge sections (discharge section 334, discharge section 333A). Furthermore, when guiding the exhaust gas relative to the exhaust sections 334 and 333A, in order to reduce the exhaust temperature, the exhaust gas discharged from the exhaust pipe 336 is mixed with the cooling air F1. That is, the rectifier plate device 332 is a device that guides the mixed gas formed by the exhaust gas discharged from the exhaust pipe 336 and the cooling air F1 relative to the exhaust sections 334 and 333A.

[0551] like Figure 84-88As shown, the rectifier plate device 332 has a cylindrical rectifier plate body 337, a guide plate 338, and an extension plate 339. The rectifier plate body 337 guides the mixed gas from the exhaust pipe 336 side to the vicinity of the discharge sections 334, 333A (near or at a given distance from the discharge sections 334, 333A) and discharges it in the vicinity of the discharge sections 334, 333A (near or at a given distance from the discharge sections 334, 333A). The guide plate 338 guides the mixed gas discharged from the rectifier plate body 337 to the discharge section (first discharge section) 334. The extension plate 339 guides the mixed gas discharged from the rectifier plate body 337 to the discharge section (second discharge section) 333A.

[0552] like Figure 88 As shown, the main body 337 of the rectifier plate is formed in an inclined shape that moves downward from the exhaust pipe side 336 toward the exhaust section 334, 333A side, and then toward the other side (left side).

[0553] like Figure 87 , Figure 88 As shown, the rectifier plate body 337 has a first structure 340 and a second structure 341 disposed downstream (on the other side) of the cooling airflow F1 relative to the first structure 340. The first structure 340 and the second structure 341 are connected to each other. That is, the second structure 341 is connected to the other side of the first structure 340.

[0554] like Figure 91 , Figure 92 As shown, the first structure 340 is formed as a cylinder opening to the right (upstream side of cooling air F1) and the left (downstream side of cooling air F1). The opening on the right side of the first structure 340 opens to one side (the right side, the exhaust pipe 336 side), forming an inlet opening 342 for taking in cooling air F1. The opening on the left side of the first structure 340 forms an outlet opening 343 for discharging (emitting) a mixture of cooling air F1 and exhaust gas. The inlet opening 342 opens upstream of cooling air F1, and the outlet opening 343 opens downstream of cooling air F1. The inlet opening 342 is formed as a rectangle that is sufficiently large relative to the diameter of the exhaust pipe 336. The size of the inlet opening 342 is not limited; for example, the longitudinal dimension of the inlet opening 342 is formed to be at least three times the diameter of the exhaust pipe 336, and the transverse dimension of the inlet opening 342 is formed to be at least twice the diameter of the exhaust pipe 336.

[0555] like Figure 89As shown, an outlet portion 336c of the exhaust gas from the exhaust pipe 336 is disposed near the inlet opening 342 or inside the cylindrical rectifier body 337. In this embodiment, the outlet portion 336c side (second pipe portion 336b) of the exhaust pipe 336 is inserted into the upper part of the rectifier body 337 via the inlet opening 342. Therefore, when exhaust gas is discharged from the exhaust pipe 336, the exhaust gas discharged from the exhaust pipe 336 is mixed with the cooling air F1 taken in from the inlet opening 342 inside the first structure 340 (rectifier body 337). This reduces the exhaust temperature of the exhaust gas. The mixed gas formed by the exhaust gas discharged from the exhaust pipe 336 and the cooling air F1 is discharged from the outlet opening 343.

[0556] In addition, the outlet portion 336c of the exhaust pipe 336 may not be inserted into the upper part of the rectifier body 337.

[0557] like Figure 91 , Figure 92 As shown, the first structure 340 includes: an upper plate 344 and a lower plate 345 with their surfaces facing vertically; a pair of longitudinal plates 346A and 346B with their surfaces facing forward and backward in the front-back direction K1; and a connecting plate 347 with its surface facing the width direction K2 of the body. The right portion 344a of the upper plate 344 is formed with its surface facing vertically. The left portion 344b of the upper plate 344 is formed in an inclined shape that shifts downward as it faces left. The right portion 345a of the lower plate 345 is arranged opposite the right portion 344a of the upper plate 344 at a distance from it. Figure 89 As shown, the left portion 345b of the lower plate 345 is formed in an inclined shape that shifts downwards towards the left, and in the inclined direction, it protrudes to the left (downstream side of the cooling air F1) more than the left portion of the upper plate 344. Figure 90 As shown, the left portion 345b of the lower plate 345 is shaped to tilt forward as it moves to the left when viewed from above. The left portion 344b of the upper plate 344 is also shaped to tilt forward as it moves to the left, similar to the left portion 345b of the lower plate 345.

[0558] like Figure 91 , Figure 92 As shown, a pair of longitudinal plates 346A and 346B are spaced apart in the front-rear direction K1 between the upper plate 344 and the lower plate 345, connecting the upper plate 344 and the lower plate 345. Specifically, the front longitudinal plate 346A is positioned between the front ends of the upper plate 344 and the lower plate 345, connecting them; the rear longitudinal plate 346B is positioned between the rear ends of the upper plate 344 and the lower plate 345, connecting them. Figure 90As shown, the pair of longitudinal plates 346A and 346B are formed in an inclined shape, with the right part 346Aa and 346Ba extending along the width direction K2 of the fuselage, and the left part 346Ab and 346Bb shifting forward as they move to the left.

[0559] like Figure 91 As shown, the connecting plate 347 extends downward from the left end of the lower plate 345.

[0560] like Figure 90 As shown, the exhaust gas discharged from the exhaust pipe 336 is blown towards the inner surface of the rear longitudinal plate 346B in an inclined direction that shifts rearward as it moves to the left. By bringing the exhaust gas discharged from the exhaust pipe 336 into contact with the inner surface of the first structure 340 (rectifier plate body 337), the flow velocity of the exhaust gas discharged from the exhaust pipe 336 can be reduced, and the exhaust gas and cooling air F1 can be well mixed to reduce the exhaust temperature. In addition, the flow of the exhaust gas can be rectified. The exhaust gas discharged from the exhaust pipe 336 is guided to the rear longitudinal plate 346B and the upper plate 344, etc., and discharged from the outlet opening 343.

[0561] Furthermore, the exhaust gas discharged from the exhaust pipe 336 is not limited to being blown towards the inner surface of the rear longitudinal plate 346B, but can also be blown towards the front longitudinal plate 346A. In addition, in this case, the inner wall surface of the counterweight 33 can also be used as a component equivalent to the rear longitudinal plate 346B.

[0562] like Figure 91 , Figure 92 As shown, a first mounting support bar 348 is fixed to the rear part of the right side 344a of the upper plate 344. Figure 85 As shown, a bracket support 349 is installed on the first mounting support 348. Figure 84 As shown, the bracket support bar 349 is installed on the mounting part 350 provided on the counterweight 33.

[0563] like Figure 91 , Figure 92 As shown, a second mounting support bar 351 is fixed on the left end side of the left part 344b of the upper plate 344.

[0564] like Figure 93 , Figure 94 , Figure 95As shown, the second structure 341 includes: an upper plate 352 with its surface facing vertically; a side plate 353 with its surface facing the width direction K2 of the body; and a pair of longitudinal plates 354A and 354B with their surfaces facing the front-rear direction K1. The upper plate 352 is inclined downwards as it faces left. The side plates 353 are spaced apart below the right end of the upper plate 352. The front longitudinal plate 354A is positioned below the front end of the upper plate 352, and its upper edge is fixed to the lower surface of the upper plate 352. The lower part of the front longitudinal plate 354A is fixed to the front end of the side plate 353. The rear longitudinal plate 354B is positioned below the rear end of the upper plate 352, and its upper edge is fixed to the lower surface of the upper plate 352. The lower part of the rear longitudinal plate 354B is fixed to the upper part of the rear end of the side plate 353. Therefore, the area below the rear longitudinal plate 354B is in a state of airflow in the front-rear direction K1 (see reference). Figure 95 ).like Figure 90 As shown, a pair of longitudinal plates 354A and 354B are formed in an inclined shape that shifts forward as they move to the left.

[0565] like Figure 93 As shown, a third mounting support 355 is fixed to the right end of the front part of the upper surface of the upper plate 352. A fourth mounting support 356 is fixed to the lower part of the front surface of the front longitudinal plate 354A.

[0566] like Figure 93 As shown, an opening 357 is formed by the right edge 352a of the upper plate 352, the upper edge 353a of the side plate 353, and the right edges 354Aa and 354Ba of the pair of longitudinal plates 354A and 354B. This opening 357 is larger than the outlet opening 343 of the first structure 340. Therefore, as... Figure 89 , Figure 90 As shown, a gap 359 is formed at the connection portion 358 between the first structure 340 and the second structure 341. The gap 359 allows cooling air F1 to be drawn from one side (right side) and from the outside of the first structure 340 into the interior of the second structure 341. More specifically, as... Figure 89 As shown, a gap 359a is formed between the upper plate 344 of the first structure 340 and the upper plate 352 of the second structure 341, as... Figure 90As shown, a gap 359b is formed between the longitudinal plate 346A on the front side of the first structure 340 and the longitudinal plate 354A on the front side of the second structure 341, and a gap 359c is formed between the longitudinal plate 346B on the rear side of the first structure 340 and the longitudinal plate 354B on the rear side of the second structure 341. Therefore, cooling air F1 is drawn into the interior of the rectifier plate body 337 from the upstream side by the exhaust gas discharged from the exhaust pipe 336. That is, the rectifier plate body 337 has a gap 359 for drawing cooling air F1 from the upstream side into the connection portion 358 between the first structure 340 and the second structure 341. By drawing cooling air F1 from the gap 359, the temperature of the exhaust gas can be reduced.

[0567] like Figure 88 As shown, the upper part of the side plate 353 overlaps with the left surface of the connecting plate 347 and is installed on the connecting plate 347. The third mounting support 355 is installed on the second mounting support 351. Figure 84 As shown, the fourth mounting support 356 is mounted on the rotary base plate 31.

[0568] Upper plates 344 and 352 constitute the upper plate of the rectifier body 337. Front longitudinal plates 346A and 354A constitute the front longitudinal plates of the rectifier body 337. Rear longitudinal plates 346B and 354B constitute the rear longitudinal plates of the rectifier body 337. Lower plate 345 constitutes the lower plate of the rectifier body 337.

[0569] like Figure 95 As shown, the guide plate 338 is positioned rearward of the lower part of the longitudinal plate 354A on the front side of the second structure 341 and to the left of the lower part of the side plate 353. Furthermore, the guide plate 338 is configured to tilt downwards as it moves rearwards from the longitudinal plate 354A, and also to tilt downwards as it moves leftwards from the side plate 353. Additionally, as... Figure 95 As shown, the front end of the guide plate 338 is fixed to the longitudinal plate 354A, and the right end of the guide plate 338 is fixed to the side plate 353.

[0570] like Figure 88 As shown, the guide plate 338 is positioned corresponding to the discharge section 334.

[0571] like Figure 90 As shown, the extension plate 339 extends to the left from the left end of the longitudinal plate 354A on the front side of the second structure 341. The extension plate 339 extends in the same direction as the front longitudinal plate 354A. More specifically, it extends in an inclined direction that shifts forward as it moves to the left. In addition, the extension plate 339 extends above the longitudinal plate 354A towards the discharge section 333A.

[0572] In the aforementioned rectifier plate device 332, the exhaust gas discharged from the exhaust pipe 336 to the upper part of the rectifier plate body 337 mixes with the cooling air F1 drawn in from the inlet opening 342. This mixed gas is guided towards the outlet opening 343 and discharged from there. The mixed gas discharged from the outlet opening 343 is guided to the longitudinal plate 354B and upper plate 352 on the rear side of the second structure 341 and discharged near the discharge sections 334 and 333A. That is, the rectifier plate body 337 guides the mixed gas from the exhaust pipe 336 side to the vicinity of the discharge sections 334 and 333A and discharges it. The flow rate of the mixed gas discharged from the rectifier plate body 337 is reduced, and it also mixes with the cooling air F1, which lowers the exhaust temperature.

[0573] In this embodiment, the exhaust gas discharged from the exhaust pipe 336 mixes with the cooling air F1 at the upper part of the rectifier plate body 337, and also mixes with the cooling air F1 near the exhaust sections 334 and 333A. Therefore, the exhaust temperature of the exhaust gas discharged from the exhaust gas purification device 26 can be sufficiently reduced. In addition, since the exhaust gas is discharged (released) from the rectifier plate body 337 before being discharged from the exhaust sections 334 and 333A, the flow rate can be sufficiently reduced.

[0574] A portion of the mixed gas emitted from the rectifier plate body 337 is guided to the guide plate 338 and discharged to the outside of the body 2 from the discharge section 334. Another portion of the mixed gas emitted from the rectifier plate body 337 is guided to the discharge section 333A through the extension plate 339 and discharged from the discharge section 333A to the underside of the rotating base plate 31 together with the cooling air F1 flowing from above the extension plate 339.

[0575] When condensate is discharged from exhaust pipe 336, guide plate 338 guides the condensate to discharge section 334. The condensate guided to discharge section 334 is discharged from discharge section 334 to the outside of body 2.

[0576] The extension plate 339 restricts the flow of the discharged mixed gas in order to prevent the mixed gas discharged from the rectifier plate body 337 from flowing toward the hydraulic pump 25.

[0577] In the above embodiment, a portion of the mixed gas emitted from the rectifier plate body 337 is discharged to the outside of the machine body 2 through the discharge section 334 formed on the counterweight 33, but there are also cases where the discharge section 334 is not provided on the counterweight 33. In this case, the discharge section, which is equivalent to the discharge section 334, may be provided on the rotating base plate 31.

[0578] Alternatively, instead of discharging the mixed gas from the rectifier body 337 near the discharge section 334, the guide tube can be extended from the outlet opening 343 of the rectifier body 337 to the discharge section 334 to discharge the mixed gas from the discharge section 334.

[0579] The aforementioned work machine 1 includes: a body 2; a support platform 52 mounted on the body 2; and a tank (fuel tank 19), which is supported on the support platform 52 in such a way that it can be moved horizontally to a setting position S1 and pulled out to a pull-out position S2 from the setting position S1.

[0580] According to this structure, by pulling the tank out of its location, maintenance of the tank or the device located near the tank can be easily performed, thereby improving maintainability.

[0581] In addition, it is equipped with a fixing device 141 that can fix the can 19 in the setting position S1 and the pull-out position S2.

[0582] According to this structure, the can 19 can be fixed in the setting position S1 and the pull-out position S2. The can 19 can be fixed stably in the setting position S1 and the can 19 can be prevented from tipping over in the pull-out position S2.

[0583] Additionally, the fixing device 141 includes a fixing belt device 160 having a belt 161 that fixes the can 19 in the setting position S1.

[0584] According to this structure, the tank 19 can be stably fixed in the setting position S1.

[0585] Additionally, the fixing strap device 160 includes: a locking member 162 disposed near the lower part of the can 19; a fixing piece 163 disposed on the side opposite to the locking member 162 with respect to the can 19; a strap 161 disposed from the locking member 162 via the upper surface of the can 19 toward the fixing piece 163; a strap hook 164 disposed at one end of the strap 161 in the length direction and hooked onto the locking member 162; and a strap fastener 165 disposed at the other end of the strap 161 in the length direction, which tightens the strap 161 and fixes it to the fixing piece 163.

[0586] This structure also allows the tank 19 to be stably fixed in the setting position S1.

[0587] Additionally, the fixing device 141 includes: a locking portion 171 disposed on the support platform 52; a first locking portion 172 and a second locking portion 173 disposed separately on the can 19 along the moving direction Y3 of the can 19; the first locking portion 172 engages with the locking portion 171 when the can 19 is in the set position S1 to restrict the movement of the can 19 in the pull-out direction Y2 from the set position S1 to the pull-out position S2 and in the push-in direction Y1 from the pull-out position S2; the second locking portion 173 engages with the locking portion 171 when the can 19 is in the pull-out position S2 to restrict the movement of the can 19 in the pull-out direction Y2 and in the push-in direction Y1.

[0588] According to this structure, the can 19 can be easily positioned and fixed in the setting position S1 and the pull-out position S2.

[0589] In addition, the engaging part 171 is the roller of the mounting part 55c1, 55c2 of the mounting can 19 provided on the support platform 52, and the first engaging part 172 and the second engaging part 173 are recesses formed on the bottom surface of the can 19 for the roller to be inserted.

[0590] According to this structure, even if the contents of the can 19 are large, the can 19 can be moved easily.

[0591] Furthermore, the first engaging portion 172 has: a first limiting surface 172A, which, when the can 19 is in the set position S1, abuts against the engaging portion 171 on the front side in the pull-out direction Y2 to limit the movement of the can 19 in the push-in direction Y1; and a first guiding surface 172B, which, when the can 19 is in the set position S1, abuts against the engaging portion 171 on the rear side in the pull-out direction Y2 to limit the movement of the can 19 in the pull-out direction Y2, and is formed to tilt in the push-in direction Y1 as it moves downward from the top of the recess. The second engaging portion 173 has: a second limiting surface 173A, which abuts against the engaging portion 171 on the front side in the pushing direction Y1 to restrict the movement of the can 19 in the pulling direction Y2 when the can 19 is in the pulled-out position S2; and a second guiding surface 173B, which abuts against the engaging portion 171 on the rear side in the pushing direction Y1 to restrict the movement of the can 19 in the pushing direction Y1 when the can 19 is in the pulled-out position S2, and is formed to be inclined as it moves from the top of the recess downwards in the pulling direction Y2.

[0592] According to this structure, the can 19, which can be positioned and fixed at the setting position S1 and the pull-out position S2, can be easily moved to the setting position S1 and the pull-out position S2.

[0593] Additionally, the fixing device 141 includes: a support member 181, which is provided on the can 19 in a manner that allows it to move integrally with the can 19; a first fixing part (support member mounting part 182Ba) and a second fixing part (protrusion member 184), which are separately provided on the two sides of the body in the moving direction Y3 of the can 19; and a first fixing member (fixing member 189), which fixes the support member 181 to the first fixing part 182Ba when the can 19 is in the set position S1, and fixes the support member 181 to the second fixing part 184 when the can 19 is in the pulled-out position S2.

[0594] Based on this structure, the structure of the fixing device 141 can be simplified.

[0595] Additionally, the fixing device 141 includes: a third fixing part (first support member 183A) and a fourth fixing part (second support member 183B), which are separately provided on the side of the body 2 in the moving direction Y3 of the can 19; a second fixing member 192A, which fixes the support member 181 to the third fixing part 183A when the can 19 is in the setting position S1; and a third fixing member 192B, which fixes the support member 181 to the fourth fixing part 183B when the can 19 is in the setting position S1. The fourth fixing part 183B is disposed relative to the third fixing part 183A in the pulling direction Y2 from the setting position S1 toward the pulling position S2. When the can 19 is in the pulling position S2, the support member 181 is fixed to the fourth fixing part 183B by the third fixing member 192B.

[0596] Based on this structure, the structure of the fixing device 141 can be simplified.

[0597] In addition, the can 19 has a can body 19A and a protrusion 19C that protrudes downward from the bottom of the can body 19A.

[0598] According to this structure, water can be separated by setting the protrusion 19C.

[0599] Alternatively, it may also have a prime mover E1 mounted on the machine body 2, and tank 19 is a fuel tank for storing fuel for the prime mover E1.

[0600] Additionally, the machine 1 includes: a body 2; a prime mover E1 mounted on the body 2; a cover 201 forming a prime mover chamber E2 that houses the prime mover E1, and which is closable; a cooling device 361 having a cooler (radiator 15) and a cooling fan 14 disposed between the prime mover E1 and the cover 201; a fixed pipe 261 disposed on the cover 201 side of the cooling device 361; and an opening / closing pipe 143D disposed on the cooling device 361 side of the cover 201. By closing the cover 201, the opening / closing pipe 143D is connected to the fixed pipe 261, and external air drawn in from outside the body 2 is introduced into the cooling device 361 via the opening / closing pipe 143D and the fixed pipe 261.

[0601] According to this structure, since a pipe structure is formed between the hood 201 and the cooling device 361, it is possible to suppress the sound leakage from the prime mover chamber E2 to the outside.

[0602] Additionally, the hood 201 has: a side wall portion (outer wall portion 143D2) disposed on the side of the cooling device 361; and an upper wall portion 143D1 connected to the upper part of the side wall portion 143D2. An external air inlet portion 125 is formed on the upper wall portion 143D1 at a position above the fixed pipe 261, for taking in external air from outside the body 2 into the opening and closing pipe 143D. The opening and closing pipe 143D is formed across the side wall portion 143D2 and the upper wall portion 143D1. The external air taken in from the external air inlet portion 125 is guided downward along the side wall portion 143D2 and then flows to the fixed pipe 261 connected to the inside of the opening and closing pipe 143D in the body width direction K2.

[0603] According to this structure, it is possible to suppress the leakage of noise from inside the hood 201 to the outside.

[0604] In addition, the opening and closing pipe 143D is formed by the side wall portion 143D2 and the upper wall portion 143D1 and the partition member 143D3 disposed on the inner side of the body 2 relative to the side wall portion 143D2 and the upper wall portion 143D1. The partition member 143D3 has an opening portion 235 formed at a position corresponding to the cooling device 361 and allowing external air to flow to the fixed pipe 261.

[0605] According to this structure, external air taken in from the external air inlet 125 formed on the upper wall portion 143D1 can be guided to the fixed pipe 261.

[0606] Additionally, a sealing material (first seal 243) is provided to seal the connection between the opening / closing pipe 143D and the fixed pipe 261 when the cover 201 is closed.

[0607] According to this structure, external air can be appropriately guided from the open / closed pipe 143D to the cooler 15.

[0608] Additionally, near the connection between the fixed pipe 261 and the open / closed pipe 143D, a dustproof net 257 is provided to capture dust contained in the outside air flowing from the open / closed pipe 143D to the fixed pipe 261.

[0609] According to this structure, by opening and closing the pipe 143D, the dustproof net 257 can be accessed, and the dustproof net 257 can be easily cleaned.

[0610] Additionally, by opening the hood 201, the dustproof net 257 can be installed or removed relative to the fixed pipe 261 or the open / closed pipe 143D.

[0611] According to this structure, the dustproof net 257 can be easily installed and removed.

[0612] Additionally, the work machine 1 includes: a body 2; a prime mover E1 mounted on the body 2; a cooling fan 14 that supplies cooling air F1 to the prime mover E1; an air filter 27 disposed downstream of the prime mover E1 from the cooling air F1; a cover 201 that forms a prime mover chamber E2 that houses the prime mover E1; an air inlet 200 disposed on the side of the prime mover E1 opposite to the cooling fan 14 on the cover 201; and a connecting pipe 302 connecting the air inlet 200 and the air filter 27.

[0613] According to this structure, the air inlet 200 is provided on the shroud 201 on the side of the prime mover E1 opposite to the cooling fan 14. The air inlet 200 is connected to the air filter 27 through the connecting pipe 302. Therefore, the path on the air intake side of the air filter 27 will not obstruct the flow of the cooling air F1 flowing around the prime mover E1, thereby improving the flow of the cooling air F1.

[0614] In addition, the air inlet section 200 includes an air inlet box 301, which forms an air intake chamber 307 for taking in air from outside the cover 201, and a connecting pipe 302 is connected to the air inlet box 301.

[0615] According to this structure, on the side of the prime mover E1 opposite to the cooling fan 14, the air filter 27 can effectively draw in outside air.

[0616] In addition, the air inlet 200 has an air inlet 128 for taking in air from outside the hood 201 into the air inlet chamber 307, and the connecting pipe 302 has an intake port 325 for drawing air from the air inlet chamber 307 into the connecting pipe 302. The intake port 325 is located at a position offset horizontally or upward from the air inlet 128 in the air inlet chamber 307.

[0617] According to this structure, even if water such as car wash water or rainwater enters from the air inlet 128, it can prevent the water from being sucked into the intake 325.

[0618] Additionally, the connecting pipe 302 has an insertion part 320 that is inserted into the air intake chamber 307. The insertion part 320 is disposed offset from the air intake 128 in a horizontal or upward direction, and the suction port 325 is formed on the wall portion (second side wall 320d) of the insertion part 320 on the side opposite to the air intake 128.

[0619] According to this structure, even if water enters from the air inlet 128, it can be more reliably prevented from being sucked into the intake port 325.

[0620] In addition, the insertion part 320 is disposed offset in the horizontal direction from the air intake 128, the intake 325 penetrates the wall 320d and is formed from the lower end of the wall 320d upwards, the insertion part 320 has a lower wall 320a forming the lower surface of the internal space of the insertion part 320, and the lower wall 320a has a cutout 326 communicating with the lower end of the intake 325.

[0621] According to this structure, even if condensation occurs in the connecting pipe 302, the condensate water can be drained from the cut 326.

[0622] In addition, the air inlet box 301 has an opening 309 that opens toward the side of the cover 201 and communicates with the air intake 128, and the opening edge forming the opening 309 is fixed to the inner surface of the cover 201.

[0623] This structure separates the interior of the hood 201 from the air intake chamber 307, preventing the prime mover E1 from drawing in hot air from the hood 201. Furthermore, it suppresses noise leakage from the hood 201 through the air inlet 128.

[0624] In addition, the air intake box 301 has a bottom wall 301a that forms the lower surface of the air intake chamber 307. The bottom wall 301a has a first edge 301a1 that forms an opening edge 309a; and a second edge 301a2 that is opposite to the first edge 301a1 and is formed in an inclined shape that moves downward from the second edge 301a2 toward the first edge 301a1. The housing 201 has a drain section 313 that allows water flowing on the bottom wall 301a to pass through to the outside of the housing 201.

[0625] According to this structure, even if water enters from the air inlet 128, the water can be discharged to the outside of the casing 201.

[0626] In addition, the cover 201 has: an opening 303 opposite to the opening 309 and with an opening edge 309a fixed around it; and a plate member 305 configured to cover the opening 303 from the outside and having an air intake 128 formed thereon. The drainage section 313 is formed by the lower edge 305a1 of the plate member 305 and the gap 306 formed between it and the surrounding wall 304a1 around the opening 303.

[0627] Based on this structure, the drainage section 313 can be easily formed.

[0628] Additionally, the connecting pipe 302 includes: a first pipe member 317 connected to the air inlet 200; a second pipe member 318 connected to the air filter 27; and a third pipe member 319 formed by an elastic member connecting the first pipe member 317 and the second pipe member 318.

[0629] According to this structure, the assembly errors of the air inlet box 301, the first pipe component 317, the air filter 27, and the second pipe component 318 can be absorbed through the third pipe component 319.

[0630] In addition, the machine 1 includes: a body 2; a prime mover E1 mounted on the body 2; a prime mover chamber E2 housing the prime mover E1; a cooling fan 14 that supplies cooling air to the prime mover E1; exhaust sections 334 and 333A at the bottom of the body 2 connecting the interior and exterior of the prime mover chamber E2; an exhaust gas purification device 26 for purifying the exhaust gas discharged from the prime mover E1; an exhaust pipe 336 that discharges the exhaust gas discharged from the exhaust gas purification device 26 into the interior space of the prime mover chamber E2; and a rectifier plate device 332 that guides the mixed gas formed by the exhaust gas discharged from the exhaust pipe 336 and the cooling air to the exhaust sections 334 and 333A.

[0631] According to this structure, the exhaust gas discharged from the exhaust gas purification device 26 is discharged in the prime mover chamber E2. The discharged exhaust gas is mixed with the cooling air in the prime mover chamber E2 and then discharged to the outside, thereby reducing the exhaust temperature and exhaust noise.

[0632] In addition, the rectifier plate device 332 has a cylindrical rectifier plate body 337 that takes in mixed gas from the exhaust pipe 336 side and discharges it near the exhaust section 334, 333A.

[0633] According to this structure, by discharging the exhaust gas discharged from the exhaust pipe 336 and the cooling air F1 near the exhaust sections 334 and 333A, and by further mixing the exhaust gas with the cooling air F1 near the exhaust sections 334 and 333A, the temperature of the exhaust gas can be sufficiently reduced. Furthermore, by discharging the exhaust gas near the exhaust sections 334 and 333A, the flow rate of the exhaust gas discharged from the exhaust sections 334 and 333A can be reduced.

[0634] In addition, the cooling fan 14 delivers cooling air F1 from one side to the other in the direction of width K2 of the body. The rectifier plate body 337 is formed in an inclined shape that moves downward from the exhaust pipe 336 side to the discharge part 334, 333A side, and has an inlet opening 342 on the exhaust pipe 336 side that opens to one side to take in cooling air F1. The outlet part 336c of the exhaust gas of the exhaust pipe 336 is located near the inlet opening 342 or inside the cylindrical rectifier plate body 337.

[0635] According to this structure, a distance is provided between the exhaust pipe 336 and the discharge parts 334 and 333A, which allows the exhaust gas and cooling air F1 discharged from the exhaust pipe 336 to be further mixed between the exhaust pipe 336 and the discharge parts 334 and 333A.

[0636] In addition, the exhaust pipe 336 is configured to blow exhaust gas toward the inner surface of the rectifier body 337.

[0637] This structure allows for a reduction in the flow rate of the exhaust gas.

[0638] In addition, the body 2 has a counterweight 33 constituting the rear of the body 2, and the discharge section 334, 333A includes a first discharge section 334 formed in the counterweight 33. The rectifier plate device 332 has a guide plate 338 extending from the rectifier plate body 337 toward the first discharge section 334 and guiding the mixed gas discharged from the rectifier plate body 337 to the first discharge section 334.

[0639] According to this structure, the mixed gas emitted near the first discharge section 334 can be guided to the first discharge section 334.

[0640] In addition, the body 2 has a base plate 31 on which the prime mover E1 is mounted, and the discharge parts 334 and 333A include a second discharge part 333A formed on the base plate 31D. The rectifier plate device 332 has an extension plate 339 extending from the rectifier plate body 337 to the top of the second discharge part 333A and guiding the mixed gas discharged from the rectifier plate body 337 to the second discharge part 333A.

[0641] According to this structure, the mixed gas emitted near the second discharge section 333A can be guided to the second discharge section 333A.

[0642] In addition, the cooling fan 14 delivers cooling air F1 from one side of the body width direction K2 to the other side. The rectifier plate body 337 has a first structure 340, a second structure 341 connected to the other side of the first structure 340, and a gap 359. The gap 359 is provided at the connection part between the first structure 340 and the second structure 341, so that the cooling air F1 is taken from one side and the outside of the first structure 340 into the inside of the second structure 341.

[0643] This structure allows for a further reduction in the temperature of the exhaust gas.

[0644] The foregoing has described one embodiment of the present invention, but it should be considered that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is defined not by the foregoing description but by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0645] Label Explanation

[0646] 2 bodies

[0647] 3. Driving device

[0648] 5 driver's cab

[0649] 6 driver's seats

[0650] 14 cooling fans

[0651] 15. Cooler (Radiator)

[0652] 18 compressors

[0653] 19 fuel tanks

[0654] 19A Tank Body

[0655] 19B Protrusion

[0656] 20-rotor motor

[0657] 26 Waste Gas Purification Device

[0658] 23 Condenser

[0659] 24 reservoirs

[0660] 25 hydraulic pump

[0661] 27 Air Filter

[0662] 28 working oil tanks

[0663] 29 Air Conditioner Main Unit

[0664] 31 substrate (rotary substrate)

[0665] 32R First longitudinal rib

[0666] 32L Second Longitudinal Rib

[0667] 41 Pad Structure Components

[0668] 52 support platform

[0669] 74 partition walls

[0670] 75 plate components

[0671] 84 Exterior Wall (Floor Panel)

[0672] 86 sidewalls

[0673] 88 Cover Wall

[0674] 89 Inlet Port

[0675] 91 discharge outlet

[0676] 95 Compressor Configuration Department

[0677] 95A Main Body

[0678] 95B Opening and Closing Shield

[0679] 95a Inspection Opening

[0680] 96 refrigerant piping

[0681] 98 Deployment Path

[0682] 101 Intake Structure

[0683] 114 Hydraulic hose (delivery hose)

[0684] 143D Opening and Closing Pipeline

[0685] 200 Air Inlet Section

[0686] 201 hood

[0687] 261 Fixed pipe

[0688] 301 Air Inlet Box

[0689] 302 connecting pipe

[0690] 332 Rectifier Plate Device

[0691] 333A Discharge Section (Second Discharge Section)

[0692] 334 Discharge Section (First Discharge Section)

[0693] 336 exhaust pipe

[0694] 361 Cooling device

[0695] E1 prime mover

[0696] E2 prime mover room

[0697] F1 Cooling Air

[0698] K2 body width direction

[0699] S1 Setting Location

[0700] S2 pull-out position

[0701] V1 control valve.

Claims

1. A work machine, comprising: Organism; The driver's cab, which is mounted on the aircraft body; The main air conditioning unit for the indoor air conditioning in the driver's cab; The prime mover compartment houses the prime mover mounted on the said machine body; and A shielding plate, which forms part of the prime mover compartment and is positioned above the prime mover, The cab has a plate member that protrudes rearward from the rear of the cab. The shielding plate is installed at the rear of the machine body. A pad structure is installed on the shielding plate to provide vibration damping support for the plate member, thereby creating a gap between the shielding plate and the plate member. The air conditioning unit is disposed above the prime mover compartment by being positioned on the upper side of the plate member, thus separating it from the prime mover compartment.

2. The work machine according to claim 1, wherein, The work machine has a driver's seat located inside the cab. The driver's cab has a seat for the operator to sit on and a backrest for supporting the operator's back. The plate member is positioned behind the lower part of the backrest of the driver's seat.

3. The work machine according to claim 1, wherein, The machine body has a counterweight that forms the rear of the machine body. The counterweight has a support portion that protrudes upwards from the counterweight, and the shielding plate is mounted on the support portion. The front part of the plate component and the front part of the air conditioning unit are disposed in the interior of the driver's cab, and the rear part of the plate component and the rear part of the air conditioning unit protrude rearward from the rear of the driver's cab.

4. The operating machine according to any one of claims 1 to 3, wherein, The work machine has: A cooling fan that draws air from outside the prime mover compartment into the prime mover compartment; A compressor that is driven by the power of the prime mover to compress the refrigerant; as well as The refrigerant pipeline connected to the compressor is laid out with: an inlet that communicates with the upper part of the prime mover chamber to introduce hot gas from the prime mover chamber; and an outlet that communicates with the outside of the prime mover chamber to discharge the hot gas introduced from the inlet.

5. The work machine according to claim 4, wherein, The work machine includes a compressor mounting section for mounting the compressor. The layout path includes: a pair of sidewalls arranged opposite each other at a distance in the width direction of the machine body; a bottom wall that closes the lower rear ends of the pair of sidewalls; and a cover wall that closes the upper ends and front ends of the pair of sidewalls. The inlet is formed between the bottom wall and the cover wall. The outlet is formed at the rear of the cover wall. The compressor configuration unit is disposed below the inlet and communicates with the inlet.

6. The work machine according to claim 5, wherein, The compressor configuration section has: a main body portion having a maintenance opening that opens forward and communicates with the pair of side walls; And an opening and closing cover that closes the maintenance opening. The opening and closing cover can be installed and removed integrally with the cover wall.

7. The work machine according to claim 4, wherein, A condenser is disposed on the side of the front part of the cab and in front of the compressor to dissipate heat from the refrigerant from the compressor and liquefy it, and a liquid receiver is disposed to store the refrigerant liquefied by the condenser. The compressor, the condenser, and the liquid receiver can be removed from the engine block along with the cab.

8. The work machine according to claim 4, wherein, The work machine includes a compressor mounting section for mounting the compressor. The compressor unit is positioned on one side of the machine body in the width direction relative to the cab, and can be accessed from the cab.

9. The work machine according to claim 8, wherein, The body comprises: a base plate; a first longitudinal rib disposed on one side of the base plate in the body width direction and extending from the front portion of the base plate toward the rear portion; and a second longitudinal rib disposed on the other side of the base plate in the body width direction and extending from the front portion of the base plate toward the rear portion. The work machine has: A hydraulic actuator, which is driven by working oil; A working oil tank that stores the working oil; A hydraulic pump that delivers the working oil from the working oil tank; A control valve that controls the flow rate of the working oil supplied from the hydraulic pump to the hydraulic actuator; and A hydraulic hose that connects the hydraulic pump to the control valve. The working oil tank is positioned on the other side of the machine body in the width direction, relative to the second longitudinal rib. The control valve is located on the other side of the machine body in the width direction, which is closer to the second longitudinal rib and forward of the working oil tank. The hydraulic pump is positioned at a location further back from the front end of the working oil tank than from the rear of the machine body. The hydraulic hose is laid between the second longitudinal rib and the working oil tank.

10. The work machine according to claim 9, wherein, The interiors of the prime mover compartment and the driver's cab are separated by a double structure formed by a partition wall and the outer wall of the driver's cab, with the partition wall separating the prime mover compartment from its exterior. The working oil tank forms part of the partition wall.

11. The work machine according to claim 9, wherein, The working machine is equipped with a fuel tank that stores fuel for the prime mover. The fuel tank is configured above the first longitudinal rib, extending transversely through the width of the fuselage.

12. The work machine according to claim 4, wherein, The discharge port is located on one side of the machine body in the width direction. The machine is equipped with an air intake structure that introduces air into the prime mover. The air intake structure introduces external air from the other side of the body width direction.

13. The work machine according to claim 1, wherein, The work machine has: Running gear; The body is rotatably supported on the traveling device; A rotary motor that causes the machine body to rotate; A tank, which is positioned near the rotary motor; and Support platform, which supports the tank. The can has: a can body; and an extension that extends from the can body toward the upper side of the rotary motor, and the can is movably supported on the support platform so that the extension can be retracted from the upper side of the rotary motor.

14. The work machine according to claim 1, wherein, The work machine has: Support platform, which is mounted on the body; and The can is supported on the support platform in such a way that it can be moved horizontally to a set position and pulled out from the set position.

15. The work machine according to claim 1, wherein, The work machine has: A cooling fan that directs cooling air toward the prime mover; The discharge section connects the interior of the prime mover chamber to the outside at the bottom of the machine body; An exhaust gas purification device that purifies the exhaust gas discharged from the prime mover; An exhaust pipe that discharges exhaust gas from the exhaust gas purification device into the interior space of the prime mover chamber; as well as A rectifier plate device that guides the mixture of exhaust gas and cooling air from the exhaust pipe to the exhaust section.

16. The work machine according to claim 1, wherein, The work machine has: A cooling fan that directs cooling air toward the prime mover; An air filter is disposed downstream of the cooling air relative to the prime mover; The hood forms a prime mover chamber that houses the prime mover; An air inlet is provided on the shroud of the prime mover on the side opposite to the cooling fan; as well as A connecting pipe that connects the air inlet to the air filter.

17. The work machine according to claim 1, wherein, The work machine has: The hood forms a prime mover chamber that houses the prime mover and is configured to be openable and closable; A cooling device having a cooling fan and a cooler disposed between the prime mover and the shroud; A fixed pipe protrudes from the cooling device toward the shroud side; as well as An opening and closing pipe protrudes from the shroud toward the cooling device side. By closing the hood, the opening / closing pipe is connected to the fixed pipe, and outside air drawn in from outside the machine body is introduced into the cooling device via the opening / closing pipe and the fixed pipe.

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