Construction machinery

Abstract

To provide a construction machinery in which releasing a rotation-limit mechanism can be readily performed even when there is a partition member inside an engine chamber.SOLUTION: An engine cover 9 is mounted on a revolving frame 5 (counterweight 5C) in such a way that it can rotate up and down between a close position covering an engine 7 and an open position exposing the engine 7 outside. A rotation-limit mechanism 31 prevents the engine cover 9 from rotating towards the close position when the engine cover 9 is at the open position. A left side plate 16B of a battery bracket 16 lies inside an engine chamber 18 and extends upwards to above the rotation-limit mechanism 31. The rotation-limit mechanism 31 has a wire 39 connected to it, which, upon a holding part 39A being operated, releases the rotation limit that has been applied to the engine cover 9 by the rotation-limit mechanism 31. A first support part 41 that supports the holding part 39A side of the wire 39 is provided in the upper side of the left side plate 16B of the battery bracket 16.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to construction machines such as hydraulic excavators. [Background technology]

[0002] Generally, a hydraulic excavator, which is a representative example of a construction machine, is equipped with a self-propelled lower traveling body and an upper rotating body that is rotatably mounted on the lower traveling body. The lower traveling body and the upper rotating body form the vehicle body of the hydraulic excavator. A working device is provided at the front of the upper rotating body so that it can be raised and lowered. Various devices including a prime mover such as an engine are mounted on the upper rotating body.

[0003] Furthermore, in hydraulic excavators (mini excavators) with a machine weight (total weight) of about 1 ton, the operator's seat may be attached to the top of an integrated engine cover (prime mover cover) that covers the engine room (prime mover compartment) due to the layout. The engine cover is provided with a rotating shaft that supports the engine cover so that it can be opened and closed. When opening and closing the engine cover for daily inspections, internal maintenance, etc., the engine cover is rotated around the rotating shaft with the operator's seat still attached.

[0004] Here, as described in Patent Document 1, for example, the hydraulic excavator may be provided with a cover holding mechanism that holds the cover in an open state to prevent the cover from being unintentionally closed during maintenance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-237995 A Summary of the Invention [Problem to be solved by the invention]

[0006] The cover holding mechanism of Patent Document 1 releases the open state held by the cover holding mechanism by lifting the stopper member. Consider a case where such a cover holding mechanism is used for the engine cover of a hydraulic excavator (mini excavator) of about 1 ton. In this case, if a wide maintenance opening is to be secured, the cover holding mechanism needs to be laid out deep within the engine room, which makes it difficult to access the cover holding mechanism.

[0007] In particular, when a partition member that protrudes upward is provided in the engine room to divide the engine room, the cover holding mechanism is blocked by the partition member, making it even more difficult to access the cover holding mechanism. In addition, if the engine cover is forcibly closed without noticing that the cover holding mechanism is holding the engine cover in the open position, the cover holding mechanism may be damaged.

[0008] An object of the present invention is to provide a construction machine in which the cover holding mechanism (rotation restricting mechanism) can be easily released even if a partition member is present in the engine room (motor room). [Means for solving the problem]

[0009] The present invention preferably relates to a construction machine comprising: a body component to which a working device is attached; a prime mover attached to the body component; a prime mover cover attached to the body component so as to be rotatable in an up-down direction between a closed position which covers the prime mover and an open position which exposes the prime mover to the outside; a rotation restriction mechanism which restricts the prime mover cover from rotating toward the closed position when the prime mover cover is in the open position; and a partition member which is located within a prime mover chamber covered by the prime mover cover and extends above the rotation restriction mechanism to separate the interior of the prime mover chamber, the rotation restriction mechanism having a gripping portion which is gripped when restriction by the rotation restriction mechanism is released, a wire which releases the rotation restriction of the prime mover cover by the rotation restriction mechanism when the gripping portion is operated is connected to the construction machine, and a first support portion which supports the gripping portion side of the wire is provided on the upper side of the partition member. Effect of the Invention

[0010] According to the present invention, even if a partition member is present in the engine compartment, the rotation restricting mechanism can be easily released. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a hydraulic excavator according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing the hydraulic excavator with the prime mover cover open. [Diagram 3] FIG. 3 is a perspective view of the hydraulic excavator with the prime mover cover open, as viewed from the rear side of FIG. 2. [Figure 4] FIG. 3 is an enlarged perspective view of part (IV) in FIG. 2. [Diagram 5] FIG. 4 is an enlarged perspective view of a portion (V) in FIG. [Figure 6] 1 is a cross-sectional view showing the driver's seat, the engine cover, the battery bracket, the rotation restriction mechanism, the connecting device, etc. [Figure 7] FIG. 7 is a cross-sectional view taken from the same direction as FIG. 6, showing a state in which the engine cover is open. [Figure 8] FIG. 8 is a side view of the battery, the battery bracket, the wire gripping portion, etc., as viewed from the rear side of FIG. 7. [Figure 9] FIG. 2 is a perspective view showing the counterweight-integrated revolving frame, the engine, the hydraulic oil tank, the battery, the battery bracket, etc. [Figure 10] FIG. 4 is a perspective view of the engine cover seen from below. [Figure 11] FIG. [Figure 12] 4 is a perspective view showing a vehicle body side bracket and a rubber stopper that constitute the connecting device. FIG. [Figure 13] FIG. 1 is a perspective view showing the counterweight-integrated revolving frame, the engine, the coupling device (the vehicle body-side bracket, the rubber stopper), etc. [Figure 14]14 is an enlarged cross-sectional view showing a connecting device (a bracket on a vehicle body side, a rubber stopper) and the like in FIG. 13. [Figure 15] FIG. 4 is a perspective view showing a coupling device and the like when the motor cover is in a closed position. [Figure 16] FIG. 4 is a perspective view showing a coupling device and the like when the motor cover is in an open position. [Figure 17] FIG. 4 is a cross-sectional view showing a coupling device and the like when the motor cover is in a closed position. [Figure 18] FIG. 4 is a cross-sectional view showing a coupling device and the like when the motor cover is in an open position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiment will be described in detail with reference to the attached drawings, taking as an example a case where the embodiment is applied to a hydraulic excavator, which is a representative construction machine (work machine), and more specifically, to a small hydraulic excavator. In the following description, the front-to-rear direction of the hydraulic excavator 1 refers to the front side as the working device 4 side, and the rear side as the counterweight 5C side, which is opposite to the working device 4. The left-to-right direction of the hydraulic excavator 1 refers to the direction perpendicular to the front-to-rear direction.

[0013] The hydraulic excavator 1 as a construction machine (work machine) is used, for example, at work sites for civil engineering, demolition, underground construction, etc. The hydraulic excavator 1 of the embodiment is configured as a mini excavator with a machine weight (total weight) of, for example, about 1 ton so that it can be used for demolition work inside buildings and excavation work in narrow places such as alleys.

[0014] 1 to 3, the hydraulic excavator 1 comprises a crawler-type travelling lower body 2, an upper rotating body 3 rotatably mounted on the lower body 2, and a working device 4 provided on the upper rotating body 3. The lower body 2 and the upper rotating body 3 form a vehicle body of the hydraulic excavator 1. The vehicle body is travelling and rotatable. A swing-type working device 4 is attached to the front side of the upper rotating body 3 so as to be able to swing. The hydraulic excavator 1 performs work such as excavating earth and sand using the working device 4.

[0015] The lower traveling body 2 is configured to include, for example, crawler belts 2A formed by attaching a plurality of shoes to endless track links, and left and right traveling hydraulic motors (not shown) that rotate the crawler belts 2A to travel (self-propel) the hydraulic excavator 1. A rotating device configured to include a rotating bearing and a rotating hydraulic motor is provided between the lower traveling body 2 and the upper rotating body 3.

[0016] The working device 4, also called a front device or working machine, has a swing post 4A that is provided on the front side of the revolving frame 5 so as to be swingable in the left-right direction. A boom 4B is rotatably attached to the swing post 4A, an arm 4C is rotatably attached to the tip of the boom 4B, and a bucket 4D as a working tool is rotatably attached to the tip of the arm 4C. The working device 4 also includes a swing cylinder 4E that swings the swing post 4A, a boom cylinder 4F that rotates the boom 4B, an arm cylinder 4G that rotates the arm 4C, and a bucket cylinder 4H that rotates the bucket 4D as a working tool cylinder.

[0017] The upper rotating body 3 is mounted on the lower traveling body 2 so as to be rotatable. The upper rotating body 3 rotates on the lower traveling body 2 by being driven by a hydraulic motor for rotation of the rotation device. The upper rotating body 3 includes, for example, a counterweight-integrated rotating frame 5 (hereinafter referred to as the rotating frame 5) as a vehicle body constituent member, an engine 7 serving as a prime mover of the hydraulic excavator 1, a prime mover cover 9 covering the engine 7, a driver's seat 10 provided above the prime mover cover 9 and in which an operator sits, and a travel lever 13 and an operation lever 14 provided in front of the driver's seat 10 for operating the hydraulic excavator 1. The operator can perform travel by the lower traveling body 2, rotation of the upper rotating body 3, excavation by the operation device 4, etc. by operating the travel lever 13 and the operation lever 14.

[0018] 9, the revolving frame 5, which serves as the vehicle body frame, includes a substantially rectangular bottom plate 5A extending in the front-rear direction, a support portion 5B provided at the front portion of the bottom plate 5A so as to protrude forward and support the working device 4 so as to be swingable in the left-right direction, and a counterweight 5C extending in the left-right direction and upward from the rear portion of the bottom plate 5A. The bottom plate 5A, the support portion 5B, and the counterweight 5C are integrally formed, for example, by casting.

[0019] The counterweight 5C is formed as a heavy weight for balancing the weight with the working device 4. In the embodiment, the vehicle body constituent member is a counterweight-integrated revolving frame in which the revolving frame and the counterweight are integrated. However, this is not limiting, and for example, the revolving frame and the counterweight may be formed separately and assembled together. In this case, the revolving frame and the counterweight, which are separate from each other, correspond to the vehicle body constituent member.

[0020] As shown in Figures 6 and 7, a coupling device 21 that rotatably couples the prime mover cover 9 to the revolving frame 5 is provided on the top surface of the counterweight 5C. The prime mover cover 9 is supported openably (rotatably) on the top of the counterweight 5C via the coupling device 21. In addition, as shown in Figures 1 to 3, a roll bar 15 is attached to the rear side of the revolving frame 5 (counterweight 5C).

[0021] The side cover 6 is provided so as to surround the periphery of the bottom plate 5A of the revolving frame 5. The side cover 6 is erected with a height dimension substantially equal to that of the counterweight 5C, and is bent into a U-shape so that the rear side is open.

[0022] The engine 7 as a prime mover is provided at the rear of the revolving frame 5. The engine 7 is located in front of the counterweight 5C and is disposed in a horizontal state extending in the left-right direction. The engine 7 is attached to the revolving frame 5 in a vibration-proof state. The engine 7 drives a hydraulic pump (not shown). Note that the prime mover (power source, driving source) for driving the hydraulic pump can be constituted by the engine 7 alone, which is an internal combustion engine, or it may be constituted by, for example, "an engine and an electric motor" or "an electric motor alone". In other words, the prime mover corresponds to, for example, an "engine", "an engine and an electric motor", or "an electric motor".

[0023] The hydraulic pump sucks in hydraulic oil stored in a hydraulic oil tank 8 (FIG. 9) and discharges (supplies) the pressurized oil toward a control valve device (not shown). The hydraulic pump supplies pressurized oil to various hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4F via the control valve device. The control valve device is a control valve group consisting of multiple directional control valves. The control valve device distributes the pressurized oil discharged from the hydraulic pump to multiple hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4F in response to the operation of the travel lever 13 and the work lever 14. This enables the hydraulic excavator 1 to travel, swing, excavate, etc.

[0024] 9, the hydraulic oil tank 8 is provided on the front right side of the rotating frame 5. The hydraulic oil tank 8 is a roughly rectangular parallelepiped container extending in the front-rear direction, and stores hydraulic oil to be supplied to various hydraulic actuators mounted on the hydraulic excavator 1.

[0025] As shown in Figs. 1 to 3, the prime mover cover 9 covers the engine 7 in an openable and closable manner. The prime mover cover 9 is formed as an openable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum. The prime mover cover 9 is formed in a box shape with an open bottom side, and is made up of a front surface 9A, a rear surface 9B, a left surface 9C, a right surface 9D, and a top surface 9E. The lower part of the front surface 9A forms a front surface 9A1 that extends vertically at the forefront of the prime mover cover 9. The top surface 9E of the prime mover cover 9 is formed to be gently curved and downwardly slanting.

[0026] A coupling device 21, which serves as a fulcrum when opening and closing the prime mover cover 9, is provided at the bottom of the rear portion 9B. The prime mover cover 9 is rotatably attached to the counterweight 5C via the coupling device 21. Meanwhile, an opening / closing lever 9F is provided at the front portion 9A. By operating the opening / closing lever 9F, the prime mover cover 9 is released from its connection (lock) to a structure (catch) on the revolving frame 5 side, allowing it to be opened upwards.

[0027] The operator's seat 10 is provided above the engine cover 9. The operator's seat 10 includes a seat portion 10A and a backrest portion 10B extending upward from the rear portion of the seat portion 10A. The operator's seat 10 is movable in the front-rear direction so that the seating position can be adjusted according to the operator's body shape and operating posture.

[0028] The floor 11 is provided extending forward from the engine cover 9. The lever stand 12 is provided upright at the front of the floor 11. On the upper part of the lever stand 12, a travel lever 13 which is an operating lever for travelling and an operation lever 14 which is an operating lever for operation are provided.

[0029] The roll bar 15 is attached to the rear side of the counterweight 5C of the revolving frame 5. The roll bar 15 is composed of an inverted U-shaped strength member that extends to a position higher than the operator sitting in the driver's seat 10. The roll bar 15 can protect the operator when, for example, a structure falls or the hydraulic excavator 1 is turned upside down. In addition, the roll bar 15 can be rotated horizontally to retract so as not to get in the way when the prime mover cover 9 is opened.

[0030] A battery bracket 16 is provided on the rear side of the revolving frame 5. The battery bracket 16 is fixed to the revolving frame 5. The battery bracket 16 constitutes a base on which a battery 17 is placed. The battery bracket 16 includes a lower plate 16A, a left side plate 16B serving as a partition member, and a front side plate 16C. As shown in Figs. 6 and 7, a guide rail 32 is provided on the surface of the left side plate 16B opposite to the surface facing the battery 17. A rod member 34 is movably attached to the guide rail 32. The guide rail 32 and the rod member 34 constitute a rotation restriction mechanism 31, which will be described later.

[0031] Next, the "mover cover 9," "connecting device 21 that rotatably supports the motor cover 9 on the revolving frame 5 (counterweight 5C)," and "rotation restriction mechanism 31 that restricts the rotation of the motor cover 9" will be described.

[0032] A driver's seat 10 on which an operator sits is attached to the prime mover cover 9. A coupling device 21 is provided between the prime mover cover 9 and the revolving frame 5 (counterweight 5C). A rotation restricting mechanism 31 is provided between the prime mover cover 9 and the battery bracket 16. The prime mover cover 9 is formed as a cup-shaped cover with the upper sides of its rectangular cylindrical peripheral surfaces (front surface 9A, rear surface 9B, left surface 9C, right surface 9D) closed by an upper surface 9E.

[0033] The rear surface 9B of the motor cover 9 is attached to the upper surface of the counterweight 5C via a connecting device 21. The front side of the motor cover 9 can be opened and closed up and down with the connecting device 21 as the rotation center O. When the motor cover 9 is in the closed state, the lower end of the front surface 9A of the motor cover 9 faces the floor 11, the lower ends of the left surface 9C and right surface 9D face the bottom plate 5A (or the side cover 6) of the revolving frame 5, and the lower end of the rear surface 9B faces the counterweight 5C of the revolving frame 5. When the motor cover 9 is in the closed position, the space enclosed by the motor cover 9 forms a motor room 18, also called an engine room.

[0034] The coupling device 21 comprises a vehicle body side bracket 22 attached to the swivel frame 5 (counterweight 5C) on the vehicle body side, a cover side bracket 24 attached to the prime mover cover 9 on the cover side, and a first support shaft 25 and a second support shaft 26 arranged between the vehicle body side bracket 22 and the cover side bracket 24 and supporting them rotatably.

[0035] As shown in Fig. 12 etc., the vehicle body side bracket 22 includes a bottom plate portion 22A, a vertical plate portion 22B, a vehicle body side first shaft support portion 22C, a vehicle body side second shaft support portion 22D, a block stopper 22E as a rigid stopper, and a stopper mounting portion 22F. The bottom plate portion 22A is placed on the upper surface of the counterweight 5C and fixed with bolts. The vertical plate portion 22B rises upward from the bottom plate portion 22A.

[0036] The vehicle body first shaft support portion 22C is located on one end side in the width direction of the vertical plate portion 22B (for example, the left side in the left-right direction of the vehicle body) and protrudes toward the rear surface portion 9B of the motor cover 9. The vehicle body second shaft support portion 22D is located on the other end side in the width direction of the vertical plate portion 22B (for example, the right side in the left-right direction of the vehicle body) and protrudes toward the rear surface portion 9B of the motor cover 9. The block stopper 22E is provided between the vehicle body first shaft support portion 22C and the vehicle body second shaft support portion 22D.

[0037] The stopper attachment portion 22F is provided between the vehicle body side first shaft support portion 22C and the vehicle body side second shaft support portion 22D. A rubber stopper 23 serving as an elastic stopper is attached to the stopper attachment portion 22F. The vehicle body side first shaft support portion 22C is provided with a vehicle body side first through hole 22C1 through which the first support shaft 25 is inserted. The vehicle body side second shaft support portion 22D is provided with a vehicle body side second through hole 22D1 through which the second support shaft 26 is inserted. The second support shaft 26 is fixed to the vehicle body side second shaft support portion 22D by welding or the like in a state where it is inserted into the vehicle body side second through hole 22D1.

[0038] As shown in Fig. 10 etc., the cover side bracket 24 includes a horizontal plate portion 24A, a cover side first shaft support portion 24B, a cover side second shaft support portion 24C, a U-shaped abutment body 24D, and an abutment piece 24E. The horizontal plate portion 24A is attached to the inner surface of the motor cover 9. The cover side first shaft support portion 24B protrudes downward from the horizontal plate portion 24A. As shown in Figs. 15 and 16, the cover side first shaft support portion 24B faces the vehicle body side first shaft support portion 22C.

[0039] The cover-side second shaft support portion 24C protrudes downward from the horizontal plate portion 24A. As shown in Fig. 15 and Fig. 16, the cover-side second shaft support portion 24C faces the vehicle-side second shaft support portion 22D. The U-shaped abutment body 24D is provided between the cover-side first shaft support portion 24B and the cover-side second shaft support portion 24C. The abutment body 24D abuts against the block stopper 22E to prevent the prime mover cover 9 from rotating any further.

[0040] The abutment piece 24E is provided between the cover side first shaft support portion 24B and the cover side second shaft support portion 24C. The abutment piece 24E abuts against the rubber stopper 23. The cover side first shaft support portion 24B is provided with a cover side first through hole (not shown) through which the first support shaft 25 is inserted. The cover side second shaft support portion 24C is provided with a cover side second through hole 24C1 through which the second support shaft 26 is inserted.

[0041] The cover side bracket 24 is welded to the underside of the rear surface portion 9B of the motor cover 9. The abutment piece 24E is provided at a position where it abuts against the rubber stopper 23 of the vehicle body side bracket 22. The abutment body 24D is provided at a position where it abuts against the block stopper 22E of the vehicle body side bracket 22. When the motor cover 9 is opened from the closed position to the open position, the abutment piece 24E abuts against the rubber stopper 23 before the abutment body 24D and the block stopper 22E abut, and the rubber stopper 23 is deformed.

[0042] This reduces the impact applied to U-shaped abutment body 24D and block stopper 22E when motor cover 9 is forcefully opened, and the load due to the weight of motor cover 9. As shown in Fig. 18, when U-shaped abutment body 24D and block stopper 22E abut against each other, abutment surface 24D1 of abutment body 24D and abutment surface 22E1 of block stopper 22E come into surface contact with each other.

[0043] As shown in Fig. 10 and other figures, the first support shaft 25 has one end which forms a flange portion 25A which protrudes in the radial direction over the entire circumference. The other end of the first support shaft 25 (the side opposite to the flange portion 25A) is provided with a pin hole through which the retaining pin 27 is inserted. In contrast, as shown in Fig. 12, the second support shaft 26 is fixed to the vehicle body side second shaft support portion 22D by welding or the like in a state in which one end of the second support shaft 26 is inserted into the vehicle body side second through hole 22D1 of the vehicle body side second shaft support portion 22D. The other end of the second support shaft 26 is provided with a pin hole through which the retaining pin 27 (Fig. 14 and other figures) is inserted.

[0044] The first support shaft 25 is inserted through the vehicle body side first through hole 22C1 of the vehicle body side first shaft support portion 22C and the cover side first through hole (not shown) of the cover side first shaft support portion 24B, and in this state, the retaining pin 27 is inserted through the pin hole. The second support shaft 26 fixed to the vehicle body side second shaft support portion 22D is inserted through the cover side second through hole 24C1 of the cover side second shaft support portion 24C, and in this state, the retaining pin 27 is inserted through the pin hole of the second support shaft 26. As a result, the cover side bracket 24 is connected to the vehicle body side bracket 22 so as to be rotatable about the support shafts 25, 26. That is, the cover side bracket 24, the vehicle body side bracket 22, the first support shaft 25, and the second support shaft 26 constitute a hinge mechanism 28 that rotatably supports the prime mover cover 9 with respect to the revolving frame 5 (counterweight 5C).

[0045] Additionally, the rubber stopper 23 and block stopper 22E of the vehicle body side bracket 22 and the abutment piece 24E and abutment body 24D of the cover side bracket 24 constitute a stopper mechanism 29 that restricts the rotation of the motor cover 9. The rubber stopper 23 is attached to the stopper attachment portion 22F of the vehicle body side bracket 22. The rubber stopper 23 can receive the load of the motor cover 9 and the members that rotate together with the motor cover 9 at the center of the motor cover 9 in the width direction or a position close to the center.

[0046] In the embodiment, both the rubber stopper 23 serving as an elastic stopper and the metal block stopper 22E serving as a rigid stopper are provided on the vehicle body side bracket 22 constituting the hinge mechanism 28. That is, the stopper mechanism 29 that restricts the rotation of the motor cover 9 is composed of the rubber stopper 23 and the metal block stopper 22E. In this case, the rubber stopper 23 abuts against the abutment piece 24E of the cover side bracket 24 when the motor cover 9 is in the open position, thereby elastically holding the motor cover 9 and the members that rotate together with the motor cover 9.

[0047] On the other hand, when the motor cover 9 is forcefully opened, the block stopper 22E comes into contact with the abutting body 24D of the cover side bracket 24, thereby preventing the motor cover 9 and the members rotating together with the motor cover 9 from rotating further in the opening direction. Either the elastic stopper (rubber stopper 23) or the rigid stopper (metallic block stopper 22E) may be omitted as necessary. That is, the stopper mechanism may be constituted by an elastic stopper, may be constituted by a rigid stopper, or may be constituted by both an elastic stopper and a rigid stopper.

[0048] As shown in Figs. 6 and 7, the rotation restriction mechanism 31 is attached between the revolving frame 5 (more specifically, the battery bracket 16) and the motor cover 9. The rotation restriction mechanism 31 restricts the motor cover 9 from rotating toward the closed position when the motor cover 9 is in the open position. As shown in Fig. 11 and other figures, the rotation restriction mechanism 31 includes a guide rail 32 attached to the battery bracket 16 on the vehicle body side, a rod support member 33 attached to the motor cover 9 on the cover side, a rod member 34 one end of which is movably attached to the guide hole 32A of the guide rail 32 and the other end of which is rotatably attached to the rod support member 33, and a wire 39 that releases the restriction of the rotation of the motor cover 9 by the rotation restriction mechanism 31. As shown in Fig. 11, the "one end" and the "other end" of the rod member 34 are not limited to the "end" of the rod member 34, but correspond to a portion having a certain width including the "end" (one end, the other end, one end side, the other end side).

[0049] As shown in FIG. 6 and other figures, the guide rail 32 is attached to the left side plate 16B of the battery bracket 16, for example, by welding. The guide rail 32 is provided with a guide hole 32A penetrating in the plate thickness direction. The guide hole 32A has a straight portion 32B that extends linearly and an enlarged portion 32C that serves as a cutout portion. When the guide rail 32 is attached to the battery bracket 16, the straight portion 32B of the guide hole 32A extends horizontally and in the front-rear direction (the direction toward and away from the counterweight 5C). The guide hole 32A has a width dimension that prevents the retaining plate 35 attached to one end of the rod member 34 from falling out. The guide hole 32A guides one end (the tip, the end on the moving side) of the rod member 34 to be movable in the length direction of the guide hole 32A.

[0050] The rod support member 33 is attached to the rear surface portion 9B of the motor cover 9. In this case, the rod support member 33 is disposed at a position corresponding to the guide rail 32 of the battery bracket 16 in the width direction of the motor cover 9. The rod support member 33 is provided with a through hole in the plate thickness direction, the through hole having an inner diameter larger than the outer diameter dimension of the rod support member 33. The other end (base end, end on the cover side) of the rod member 34 is rotatably attached to the through hole of the rod support member 33.

[0051] The rod member 34 is provided between the battery bracket 16 (more specifically, the guide rail 32) and the motor cover 9 (more specifically, the rod support member 33). One end of the rod member 34 is movably attached within the guide hole 32A of the guide rail 32. The other end of the rod member 34 is rotatably attached to the rod support member 33. One end of the rod member 34 moves into the enlarged portion 32C of the guide hole 32A as the motor cover 9 rotates, in order to prevent the motor cover 9 from closing unintentionally when the motor cover 9 is in the open position.

[0052] The rod member 34 is formed by bending both ends of an elongated rod-shaped body made of, for example, a steel rod. That is, one end of the rod member 34 is bent in a direction to enter the guide hole 32A of the guide rail 32. The other end of the rod member 34 is bent in a direction to enter the through hole of the rod support member 33. In this embodiment, both ends of the rod member 34 are bent in the same direction (towards the battery 17, which is the right side of the vehicle body).

[0053] A side ring 36 is fixed to one end of the rod member 34 for positioning the one end with respect to the guide rail 32. A pin hole (not shown) through which a retaining pin (not shown) is inserted is provided at one end of the rod member 34, closer to the tip side than the side ring 36. Two rectangular retaining plates 35 are attached to one end of the rod member 34 so as to sandwich the guide rail 32. The two retaining plates 35 are sandwiched between the side ring 36 and the retaining pins. As a result, one end of the rod member 34 is attached to the guide rail 32 so as to be movable within the guide hole 32A.

[0054] An other-side ring 37 is fixed to the other end of the rod member 34 for positioning the other side with respect to the rod support member 33. Furthermore, a pin hole through which a retaining pin 38 is inserted is provided at the other end of the rod member 34, closer to the tip side than the other-side ring 37. The rod support member 33 is clamped between the other-side ring 37 and the retaining pin 38 with the other end of the rod member 34 inserted into the through hole. In this way, the other end of the rod member 34 is rotatably attached to the rod support member 33 provided on the motor cover 9.

[0055] Further, a wire 39 is attached to one end of the rod member 34. The wire 39 is a restriction release member that releases the restriction imposed by the rotation restriction mechanism 31. One end side (base end side) of the wire 39 is attached to one end of the rod member 34, between the one side ring 36 and the retaining plate 35. The other end side (tip side) of the wire 39 forms a ring-shaped grip part 39A (pulling part) into which the operator inserts his / her finger. The rotation restriction mechanism 31 restricts the rotation of the motor cover 9 to the closed position by inserting one end of the rod member 34 into the enlarged part 32C.

[0056] That is, the motor cover 9 is restricted from further rotating to the closed position by one end of the rod member 34 abutting against the abutment portion 32D which is the side edge of the expanded portion 32C. The wire 39 is used when one end of the rod member 34 is pulled up from the expanded portion 32C past the abutment portion 32D to the straight portion 32B. That is, by guiding one end of the rod member 34 to the straight portion 32B with the wire 39, the restriction by the rotation restriction mechanism 31 can be released. This allows the motor cover 9 to be rotated from the open position to the closed position.

[0057] When the motor cover 9 is opened from the closed position to the open position, the motor cover 9 rotates integrally with the members (cover side members) such as the driver's seat 10 mounted on the motor cover 9. In this case, when the center of gravity G of the motor cover 9 and the entire members rotating together with the motor cover 9 (hereinafter referred to as the entire motor cover 9) passes through a vertical (perpendicular) imaginary line AA that passes through the rotation center O of the motor cover 9 and extends in the up-down direction, the motor cover 9 opens to the open position due to its own weight.

[0058] At this time, the stopper mechanism 29 begins to abut the rubber stopper 23 on the vehicle body side bracket 22 side and the abutment piece 24E of the cover side bracket 24. At the same time, the rotation restriction mechanism 31 causes one end of the rod member 34 to enter the enlarged portion 32C of the guide hole 32A. This restricts the movement range of the prime mover cover 9 to a range in which the one end of the rod member 34 can move within the enlarged portion 32C. In other words, the prime mover cover 9 can rotate toward the open position within the range corresponding to the enlarged portion 32C, but is restricted from rotating toward the closed position beyond the range corresponding to the enlarged portion 32C.

[0059] FIG. 7 shows the state of the rotation restriction mechanism 31 and the connecting device 21 (hinge mechanism 28, stopper mechanism 29) when the motor cover 9 is in the open position (maximum open position). At this time, the stopper mechanism 29 applies the load due to the weight of the entire motor cover 9 from the abutting piece 24E of the cover side bracket 24 to the rubber stopper 23 on the vehicle body side bracket 22 side, and the rubber stopper 23 is compressed and deformed. As a result, the load due to the weight of the motor cover 9 is reduced by the rubber stopper 23. Also, in the rotation restriction mechanism 31, one end of the rod member 34 moves within the enlarged portion 32C of the guide hole 32A and stops halfway through the enlarged portion 32C. Therefore, almost no load due to the weight of the motor cover 9 is applied to the rod member 34 and the guide rail 32 (guide hole 32A).

[0060] Here, in the hydraulic excavator 1 (i.e., mini-excavator) as in the embodiment, the replacement of the battery 17 is one of the maintenance operations that are performed by opening the prime mover cover 9. For this reason, when the rotation angle when the prime mover cover 9 is in the closed position is taken as a reference (0°), it is preferable that the rotation angle of the prime mover cover 9 in the open position is set to a minimum rotation angle (e.g., 60°) or more at which an operator can replace the battery 17. In the embodiment, the maximum rotation angle of the prime mover cover 9 is set to, for example, 80°. The maximum rotation angle can be set, for example, as the rotation angle of the prime mover cover 9 when the block stopper 22E, which serves as a rigid stopper, comes into contact with the U-shaped contact body 24D. Note that Figs. 15 and 17 show the coupling device 21 (hinge mechanism 28, stopper mechanism 29) when the prime mover cover 9 is in the closed position, and Figs. 16 and 18 show the coupling device 21 (hinge mechanism 28, stopper mechanism 29) when the prime mover cover 9 is in the maximum closed position.

[0061] When the motor cover 9 is in the open position, a force in the opening direction is generated on the motor cover 9 due to the weight of the entire motor cover 9. Therefore, in the stopper mechanism 29, the rubber stopper 23 comes into contact with the abutment piece 24E of the cover side bracket 24, and further, the rubber stopper 23 is compressed and deformed due to the load due to the weight of the entire motor cover 9. Furthermore, when the motor cover 9 is in the open position, in the rotation restriction mechanism 31, one end of the rod member 34 is located in the enlarged portion 32C of the guide hole 32A. This keeps the motor cover 9 in the open state. At this time, a force is applied to the motor cover 9 by the reaction force of the rubber stopper 23 to return the motor cover 9 in the closing direction. Therefore, when the motor cover 9 is in the open position and no external force is applied to the motor cover 9, the rotation angle of the motor cover 9 is about 70°, which is smaller than the maximum angle of 80°.

[0062] Incidentally, in the case of a small hydraulic excavator 1 of about 1 ton, in order to ensure a wide maintenance opening when the prime mover cover 9 is opened, it is necessary to lay out the rotation restricting mechanism 31 in a recessed location in the prime mover room 18 (engine room), which is the space surrounded by the prime mover cover 9. For this reason, if left as is, access to the rotation restricting mechanism 31 becomes poor.

[0063] In particular, when a partition member such as the left side plate 16B of the battery bracket 16 is provided inside the motor compartment 18 to divide the inside of the motor compartment 18, the rotation restricting mechanism 31 is blocked by the partition member (left side plate 16B), making it even more difficult to access the rotation restricting mechanism 31. Furthermore, even though the rotation restricting mechanism 31 restricts the rotation of the motor cover 9 to the closed position, if the rotation restricting mechanism 31 is not noticed and the motor cover 9 is forcibly closed, the rotation restricting mechanism 31 may be damaged.

[0064] Therefore, in the embodiment, the rotation restricting mechanism 31 is released by a wire 39. The wire 39 (the gripping portion 39A) is arranged in a clear location, so that the rotation restricting mechanism 31 can be released easily. In other words, the rotation restricting mechanism 31 can be released by remote operation at a position away from the rotation restricting mechanism 31 by using the wire 39. This allows the rotation restricting mechanism 31 to be released in a place where it is easy to understand and operate, rather than in a narrow and deep space. As a result, the workability of inspection, maintenance, etc., which is performed by opening and closing the motor cover 9 can be improved. This point will be described in detail below.

[0065] When performing maintenance on various devices covered by the prime mover cover 9, a worker performing the maintenance opens the prime mover cover 9 using the connecting device 21 (hinge mechanism 28) as a fulcrum. At this time, a rotation restriction mechanism 31 that restricts the prime mover cover 9 from rotating toward the closed position is provided between the prime mover cover 9 and the rotating frame 5 (more specifically, the battery bracket 16) so that the prime mover cover 9 can be maintained in an open state (i.e., so that unintentional closing action can be avoided).

[0066] The rotation restricting mechanism 31 needs to be compact due to layout constraints of the various devices in the motor compartment 18, so it is often installed near the rotation fulcrum of the motor cover 9. When maintenance is completed and the motor cover 9 is to be closed, the maintenance worker needs to release the restriction of the rotation restricting mechanism 31. At this time, since the rod member 34 of the rotation restricting mechanism 31 is located in a recessed area, it is difficult to find the location of the rod member 34 as it is, and it is also difficult to release the contact between one end of the rod member 34 and the contact portion 32D.

[0067] In contrast, in the embodiment, the wire 39 is attached to the rod member 34 so that the contact between one end of the rod member 34 and the contact portion 32D can be remotely released. In addition, when the motor cover 9 is in the open position, the grip portion 39A of the wire 39 is configured to protrude upward from the partition member (the left side plate 16B of the battery bracket 16). For this reason, a first support portion 41 (first guide portion) that movably supports (guides) the grip portion 39A side of the wire 39 is provided on the upper side of the left side plate 16B of the battery bracket 16. When the height of the left side plate 16B is H, the first support portion 41 is provided at a position higher than 1 / 2H, preferably higher than 2 / 3H, more preferably higher than 3 / 4H, and even more preferably higher than 4 / 5H.

[0068] The left side plate 16B is provided with a second support portion 42 (second guide portion) that is disposed between the rotation restriction mechanism 31 and the first support portion 41 and movably supports (guides) the middle portion of the wire 39. The grip portion 39A of the wire 39 is disposed forward of the abutment portion 32D of the rotation restriction mechanism 31 in the front-rear direction of the vehicle body. The upper edge of the left side plate 16B is provided with an inclined portion 16B1. The inclined portion 16B1 is inclined in a direction such that the front side in the front-rear direction is lower than the rear side. When the motor cover 9 is in the open position, the grip portion 39A of the wire 39 protrudes upward from the inclined portion 16B1.

[0069] As shown in FIG. 6, the distance between one end of the rod member 34 and the second support portion 42 when the motor cover 9 is in the closed position is L1. Also, as shown in FIG. 7, the distance between one end of the rod member 34 and the second support portion 42 when the motor cover 9 is in the open position is L2. In this case, L1>L2. Therefore, when the motor cover 9 is in the open position, the grip portion 39A of the wire 39 protrudes from the upper end edge of the left side plate 16B, making it easy to access the grip portion 39A of the wire 39. Also, when the motor cover 9 is in the closed position, the grip portion 39A of the wire 39 retracts below the upper end edge of the left side plate 16B, making it possible to suppress interference with the inner surface of the motor cover 9.

[0070] When closing the prime mover cover 9, the rotation restriction mechanism 31 can be easily released (the abutment between one end of the rod member 34 and the abutment portion 32D can be released) by pulling up the grip portion 39A of the wire 39 protruding from the upper edge of the left side plate 16B. In addition, since the grip portion 39A of the wire 39 protrudes from the upper edge of the left side plate 16B, the location where the release operation is performed is clear. Therefore, the rotation restriction mechanism 31 can be released by operating the grip portion 39A of the wire 39 from either the left or right side of the vehicle (machine body). As a result, the prime mover cover 9 can be easily closed.

[0071] Thus, according to the embodiment, the hydraulic excavator 1 as a construction machine includes the revolving frame 5 as a vehicle body constituent member, the engine 7 as a prime mover, the prime mover cover 9, the rotation restricting mechanism 31, and the left side plate 16B as a partition member. The working device 4 is attached to the front side of the revolving frame 5. The engine 7 is attached to the revolving frame 5. The prime mover cover 9 is attached to the revolving frame 5 (counterweight 5C) so as to be rotatable in the vertical direction between a closed position (e.g., Figs. 1, 6, 15, 17) that covers the engine 7 and an open position (e.g., Figs. 2, 3, 7, 8, 16, 18) that exposes the engine 7 to the outside.

[0072] The rotation restricting mechanism 31 restricts the rotation of the motor cover 9 toward the closed position when the motor cover 9 is in the open position. The left side plate 16B is located in the motor chamber 18 covered by the motor cover 9 and extends above the rotation restricting mechanism 31. The left side plate 16B divides the motor chamber 18. In addition, according to the embodiment, a wire 39 is connected to the rotation restricting mechanism 31. The wire 39 is connected to one end of the rod member 34. The wire 39 has a gripping portion 39A that is gripped when the restriction by the rotation restricting mechanism 31 is released. When the gripping portion 39A is operated, the wire 39 releases the restriction of the rotation of the motor cover 9 by the rotation restricting mechanism 31. In addition, a first support portion 41 that supports the gripping portion 39A side of the wire 39 is provided on the upper side of the left side plate 16B.

[0073] The rotation restriction mechanism 31 includes a guide rail 32 and a rod member 34. The guide rail 32 is provided on the revolving frame 5 side (more specifically, the battery bracket 16 fixed to the revolving frame 5). The guide rail 32 has a guide hole 32A extending in a predetermined direction (more specifically, the longitudinal direction of the guide rail 32). One end (front end, tip end) of the rod member 34 is movably attached to the guide hole 32A of the guide rail 32, and the other end (rear end, base end) is rotatably attached to the motor cover 9 (more specifically, the rod support member 33 fixed to the motor cover 9). As shown in FIG. 11, the "one end" and "other end" of the rod member 34 are not limited to the "end" of the rod member 34, but correspond to a portion having a certain width including the "end" (one end, other end, one end side, other end side).

[0074] A contact portion 32D is provided in the guide hole 32A of the guide rail 32 to restrict rotation of the motor cover 9 toward the closed position by contacting one end of the rod member 34. The wire 39 is connected to one end of the rod member 34. The grip portion 39A of the wire 39 is disposed on a side farther away from the rotation center O of the motor cover 9 than the contact portion 32D. In other words, the grip portion 39A of the wire 39 is disposed forward in the front-rear direction of the vehicle body than the contact portion 32D.

[0075] The first support portion 41 movably supports (guides) the grip portion 39A side of the wire 39. The second support portion 42 is provided on the left side plate 16B serving as a partition member. The second support portion 42 is disposed between the rotation restricting mechanism 31 and the first support portion 41. The second support portion 42 movably supports (guides) the middle portion of the wire 39. The left side plate 16B is positioned between the engine 7 serving as the prime mover and the battery 17 disposed adjacent to the engine 7 to separate them. The left side plate 16B prevents the heat of the engine 7 from being transferred to the battery housing space in which the battery 17 is disposed. In other words, the left side plate 16B prevents the battery 17 from becoming too hot.

[0076] The rotation restriction mechanism 31 and the first support part 41 are provided on the side of the left side plate 16B opposite to the battery 17. At the same time, the wire 39 is also provided on the side of the left side plate 16B opposite to the battery 17. The reason why the rotation restriction mechanism 31 including the wire 39 is provided on the side opposite to the battery 17 is to prevent a short circuit caused by the wire 39 accidentally touching the battery 17 during maintenance such as battery replacement. The upper edge of the left side plate 16B is provided with an inclined part 16B1 inclined in a direction in which the height decreases with increasing distance from the rotation center O of the motor cover 9. That is, the upper edge of the left side plate 16B is provided with an inclined part 16B1 inclined in a direction in which the height decreases with increasing distance from the rotation center O of the motor cover 9. When the motor cover 9 is in the open position, the grip part 39A of the wire 39 is disposed protruding upward from the inclined part 16B1 of the left side plate 16B.

[0077] The hydraulic excavator 1 according to the embodiment has the configuration described above. Next, its operation will be described.

[0078] The operator boards on the floor 11 and sits in the driver's seat 10. The operator seated in the driver's seat 10 can operate the travel lever 13 on the lever stand 12 to travel the lower traveling body 2. On the other hand, the operator can operate the work lever 14 to rotate the upper rotating body 3 and turn the work device 4 to perform work such as excavating soil and sand.

[0079] Also, for example, when performing maintenance on the engine 7, the prime mover cover 9 is opened from the closed position. Specifically, by operating the opening / closing lever 9F, which serves as a locking mechanism for the prime mover cover 9, the prime mover cover 9 is unlocked from the revolving frame 5, and the prime mover cover 9 is lifted in the opening direction. At this time, the prime mover cover 9 is opened upward with the first support shaft 25 and the second support shaft 26 of the hinge mechanism 28 as the rotation center O. Then, when the prime mover cover 9 exceeds a predetermined rotation angle, one end of the rod member 34 of the rotation restriction mechanism 31 enters the enlarged portion 32C of the guide hole 32A. As a result, the prime mover cover 9 is held in an open state by the rotation restriction mechanism 31 within a range in which one end of the rod member 34 can move within the enlarged portion 32C of the guide hole 32A. The predetermined rotation angle can be set, for example, at an angle at which the center of gravity G of the entire prime mover cover 9 exceeds a vertical imaginary line AA that passes through the rotation center O of the prime mover cover 9 and extends in the up-down direction.

[0080] That is, when the operator rotates the prime mover cover 9 from the closed position to the open position, one end of the rod member 34 is guided in the straight portion 32B of the guide hole 32A from one side (the front side, the working device 4 side) to the other side (the rear side, the counterweight 5C side) in accordance with this rotation. Then, when the opening operation of the prime mover cover 9 is continued, the one end of the rod member 34 moves to the enlarged portion 32C of the guide hole 32A. As a result, the prime mover cover 9 is brought into an "open holding state" in which the open state is held by the rotation restriction mechanism 31.

[0081] Fig. 7 shows the state where the motor cover 9 is in the maximum open position. As shown in Fig. 7, even at this time, one end of the rod member 34 can move within the enlarged portion 32C of the guide hole 32A and does not come into contact (clash) with the longitudinal (front-rear) edge 32E of the guide hole 32A. When the motor cover 9 is in the open position, even if a force in the closing direction is applied to the motor cover 9 due to an external force such as wind, the one end of the rod member 34 comes into contact with the contact portion 32D of the enlarged portion 32C. As a result, the restriction by the rotation restriction mechanism 31 is not released, and the motor cover 9 can be maintained in the open state.

[0082] When opening the motor cover 9 from the closed position, a large force corresponding to the weight of the entire motor cover 9 is required until the center of gravity G of the entire motor cover 9 passes over the imaginary vertical line AA passing through the rotation center O. However, once this point is exceeded, the weight of the entire motor cover 9 acts in the direction of opening the motor cover 9. As a result, an auxiliary force in the opening direction due to the weight of the entire motor cover 9 is applied to the motor cover 9, making it possible to easily open the motor cover 9 to the open position.

[0083] At this time, one end of the rod member 34 of the rotation restriction mechanism 31 enters the enlarged portion 32C of the guide hole 32A in accordance with the opening movement of the motor cover 9, and passes the abutment portion 32D, dropping below the enlarged portion 32C. As a result, the rotation restriction mechanism 31 automatically enters the "open holding state." In addition, even if the hand is released from the motor cover 9 before the abutment piece 24E of the cover side bracket 24 abuts against the rubber stopper 23 after the center of gravity G of the entire motor cover 9 passes the imaginary line AA, the rubber stopper 23 can cushion the momentum of the motor cover 9. This can prevent the block stopper 22E of the vehicle side bracket 22 and the abutment body 24D of the cover side bracket 24 from colliding with a strong force. In addition, the load applied to the rotation restriction mechanism 31 can also be reduced.

[0084] After the necessary work such as the maintenance of the engine 7 is completed, the prime mover cover 9 is returned from the open position to the closed position. At this time, the operator pulls upward the gripping portion 39A of the wire 39 visible from the opening of the prime mover cover 9 with one hand. This allows one end of the rod member 34 to be pulled up to the upper side of the enlarged portion 32C, and the restriction by the rotation restriction mechanism 31 can be released. At this time, in accordance with this movement, the prime mover cover 9 is lifted in the closing direction with the other hand. Then, when the rotation angle of the prime mover cover 9 becomes small to the position where one end of the rod member 34 becomes the straight portion 32B, the restriction by the rotation restriction mechanism 31 is completely released. After that, the hand is released from the wire 39 and the prime mover cover 9 is closed, so that the prime mover cover 9 can finally be brought to the closed position.

[0085] As described above, according to the embodiment, the wire 39 that releases the rotation restriction of the motor cover 9 by the rotation restriction mechanism 31 when the grip portion 39A is operated is connected to the rotation restriction mechanism 31. In addition, the first support portion 41 that supports the grip portion 39A side of the wire 39 is provided on the upper side of the left side plate 16B that serves as the partition member. Therefore, the grip portion 39A of the wire 39 can be made to protrude to the upper side of the left side plate 16B. This makes it possible to easily release the rotation restriction mechanism 31 even if the left side plate 16B is present inside the motor chamber 18. Moreover, since the wire 39 needs to be operated to release the restriction by the rotation restriction mechanism 31, it is possible to prevent the operation of closing the motor cover 9 without operating the wire 39. This also makes it possible to prevent the rotation restriction mechanism 31 from being damaged.

[0086] According to the embodiment, grip portion 39A of wire 39 is disposed on the side farther from rotation center O of motor cover 9 than contact portion 32D of rotation restricting mechanism 31. Therefore, grip portion 39A of wire 39 can be positioned closer to the opening side of motor cover 9 than contact portion 32D of rotation restricting mechanism 31. This allows an operator to easily access wire 39 and easily operate wire 39.

[0087] According to the embodiment, the first support portion 41 movably supports (guides) the grip portion 39A side of the wire 39. In addition, the second support portion 42, which movably supports (guides) the middle portion of the wire 39, is provided between the rotation restriction mechanism 31 and the first support portion 41 on the left side plate 16B, which serves as a partition member. Therefore, by appropriately restricting the position of the second support portion 42, the grip portion 39A of the wire 39 can be made to protrude above the left side plate 16B when the motor cover 9 is in the open position, and the grip portion 39A of the wire 39 can be prevented from protruding above the left side plate 16B when the motor cover 9 is in the closed position. This makes it possible to make the grip portion 39A of the wire 39 stand out when the motor cover 9 is in the open position. Also, it is possible to prevent interference (contact) between the inner surface of the motor cover 9 and the grip portion 39A of the wire 39 when the motor cover 9 is in the closed position.

[0088] According to the embodiment, the left side plate 16B of the battery bracket 16 separates the engine 7 as a prime mover from the battery 17. Therefore, the left side plate 16B can prevent the heat of the engine 7 from being transmitted to the battery housing space in which the battery 17 is arranged. That is, the left side plate 16B can prevent the battery 17 from becoming too hot. In addition, the rotation restriction mechanism 31 and the first support portion 41 are provided on the side of the left side plate 16B opposite the battery 17. Therefore, the rotation restriction mechanism 31 including the wire 39 is located on the side opposite the battery 17. This can prevent a short circuit caused by the wire 39 accidentally touching the battery 17 during maintenance such as battery replacement. Moreover, even if the rotation restriction mechanism 31 is blocked by the left side plate 16B separating the engine 7 from the battery 17, the grip portion 39A of the wire 39 protruding on the upper side of the left side plate 16B can be easily operated from the battery 17 side. This can also be easily performed from this side.

[0089] According to the embodiment, when the motor cover 9 is in the open position, the grip portion 39A of the wire 39 is disposed so as to protrude upward from the inclined portion 16B1 on the upper edge of the left side plate 16B. Therefore, by operating the grip portion 39A of the wire 39 protruding upward from the inclined portion 16B1, the rotation restriction mechanism 31 can be easily released.

[0090] In the embodiment, the counterweight-integrated revolving frame 5 has been described as an example of a vehicle body component that constitutes the vehicle body of the hydraulic excavator 1. However, the present invention is not limited to this, and for example, the revolving frame and the counterweight may be separate bodies, and the counterweight that is separate from the revolving frame may be fixed to the revolving frame. In this case, the revolving frame and the counterweight correspond to vehicle body components, i.e., vehicle body components to which the working device is attached and to which the prime mover cover is attached.

[0091] That is, the prime mover cover can be attached to the revolving frame to which the working device is attached directly or via other members (counterweight, building cover, prime mover cover support member, etc.). In the case where the prime mover cover is directly attached to the revolving frame, the revolving frame corresponds to the vehicle body constituent member to which the working device and the prime mover cover are attached. In the case where the prime mover cover is attached to the revolving frame via other members, the revolving frame and other members (counterweight, building cover, prime mover cover support member, etc.) correspond to the vehicle body constituent member to which the working device and the prime mover cover are attached.

[0092] In the embodiment, the hydraulic excavator 1 equipped with a swing-type working implement 4 has been described as an example. However, the present invention is not limited to this, and can be applied to hydraulic excavators equipped with other types of working implements (front implements), such as hydraulic excavators equipped with a mono-boom type working implement and hydraulic excavators equipped with an offset type working implement. In addition, although the embodiment has been described as an example in which the working implement of the working implement 4 is the bucket 4D, a working implement equipped with another working implement, such as a crusher, may also be used.

[0093] In the embodiment, the hydraulic excavator 1 equipped with the roll bar 15 has been described as an example. However, the present invention is not limited to this, and for example, a hydraulic excavator with a cab or a hydraulic excavator with a canopy may be used.

[0094] In the embodiment, a small hydraulic excavator 1 has been described as an example, but the present invention may be applied to a larger hydraulic excavator, for example. Also, although the vehicle body has been described as being composed of a lower traveling body 2 and an upper rotating body 3, the vehicle body may not have a rotating body (for example, an articulated vehicle body in which a front vehicle body having front wheels and a rear vehicle body having rear wheels are flexibly connected via a connecting shaft).

[0095] In the embodiment, the hydraulic excavator 1 has been taken as an example of the construction machine, but the present invention is not limited to this and can be widely applied to various types of construction machines such as wheel loaders. [Explanation of symbols]

[0096] 1. Hydraulic excavator (construction machinery) 2 Undercarriage (car body) 3 Upper rotating body (car body) 4 Work equipment 5 Swing frame (body component) 7 Engine (prime mover) 9 Engine cover 10 Driver's seat 16 Battery bracket 16B Left side panel (partition member) 16B1 Slope section 18 Engine Room 31 Rotation control mechanism 32 Guide rail 32A Guide hole 32D Contact part 34 Rod member 41 1st support part (1st guide part) 42 Second support part (second guide part) O Rotation center

Claims

1. A vehicle body component having a working device attached thereto; A prime mover attached to the vehicle body structural member; and a prime mover cover attached to the vehicle body constituent member so as to be rotatable in a vertical direction between a closed position covering the prime mover and an open position exposing the prime mover to the outside; a rotation restricting mechanism that restricts the motor cover from rotating toward the closed position when the motor cover is in the open position; a partition member that is located within a motor chamber covered by the motor cover, extends above the rotation restricting mechanism, and partitions the motor chamber, the rotation restriction mechanism has a gripping portion that is gripped when the restriction by the rotation restriction mechanism is released, and a wire is connected to the gripping portion that releases the restriction of rotation of the motor cover by the rotation restriction mechanism when the gripping portion is operated, A construction machine characterized in that a first support portion for supporting the gripping portion side of the wire is provided on the upper side of the partition member.

2. The rotation restriction mechanism includes: a guide rail having a guide hole extending in a predetermined direction and provided on the vehicle body component; a rod member having one end movably attached to the guide hole of the guide rail and the other end rotatably attached to the prime mover cover, a contact portion that contacts the one end of the rod member and restricts the motor cover from rotating toward the closed position, The wire is connected to the one end of the rod member, 2. The construction machine according to claim 1, wherein the gripping portion of the wire is disposed on a side farther from the rotation center of the motor cover than the contact portion.

3. The first support portion movably supports the grip portion side of the wire, 2. The construction machine according to claim 1, wherein the partition member is provided with a second support portion that is disposed between the rotation restricting mechanism and the first support portion and movably supports an intermediate portion of the wire.

4. the partition member is located between the prime mover and a battery provided adjacent to the prime mover to provide a partition therebetween, The construction machine according to claim 1 , wherein the rotation restricting mechanism and the first support portion are provided on one of the sides of the partition member opposite to the battery.

5. The partition member has an upper end edge provided with an inclined portion that is inclined in a direction that decreases in height as it moves away from the rotation center of the motor cover, The construction machine according to claim 1 , wherein when the prime mover cover is in the open position, the gripping portion of the wire is positioned to protrude upward from the inclined portion.

Images