Work machine

Abstract

The invention provides a work machine capable of facilitating arrangement of a wire harness connected with a controller and facilitating maintenance work of the controller. A work machine is provided with: a hydraulic pump disposed on one side of a prime mover in a machine chamber; a heat exchanger disposed on the other side with respect to the prime mover in the machine chamber; and a bracket disposed in the machine chamber so as to face a removable cover member forming a side wall of the machine chamber, and having the controller attached thereto. The bracket is disposed such that at least a portion thereof is positioned on one side of the hydraulic pump and above the hydraulic pump when viewed from the rear surface.

Description

Technical Field

[0001] This invention relates to work machinery. Background Technology

[0002] Previously, as an example of construction machinery, patent document 1 describes a type of engineering machinery. In this construction machinery, in the engine compartment, starting from the upstream side in the airflow direction, an intake duct, a heat exchanger, a fan shroud, a fan, an engine, and a hydraulic pump are arranged in sequence. The engine is located below the seat support where the driver's seat is located. Electrical mounting components, such as a controller, are arranged between the seat support and the heat exchanger, and above the fan shroud. That is, the controller is located on the heat exchanger side relative to the engine.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2015-90050

[0004] In recent years, electronic control, enabling communication between multiple electrical components, has been developing in operating machinery. As in Patent Document 1, in structures where the controller is positioned relative to the engine on the heat exchanger side, the communication wiring harness connecting the controller to other electrical components needs to be routed around the large heat exchanger and fan. This results in longer wiring harnesses and makes installation difficult. Furthermore, in the case of electronically controlling a hydraulic pump positioned opposite the fan relative to the engine, the wiring harness connecting the controller and the hydraulic pump needs to be routed around the large engine. This further exacerbates the aforementioned problem of difficult wiring harness installation. Additionally, if the controller is positioned between the seat support and the heat exchanger, the heat exchanger becomes an obstacle during controller maintenance, making maintenance difficult. Summary of the Invention

[0005] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a working machine that makes it easy to configure the wiring harness connected to the controller and to make the maintenance of the controller easier.

[0006] One aspect of the present invention relates to a working machine having a hydraulic pump disposed on one side of a machine room relative to a prime mover, and further comprising: a heat exchanger disposed on the other side of the machine room relative to the prime mover; and a bracket disposed in the machine room opposite to a detachable cover member forming the side wall of the machine room, and equipped with a controller, wherein at least a portion of the bracket is located on the side of the machine room closer to the hydraulic pump and above the hydraulic pump when viewed from the rear.

[0007] The above structure makes it easy to configure the wiring harness connected to the controller and to make the controller maintenance work easier. Attached Figure Description

[0008] Figure 1 This is a left-side view showing the schematic structure of a hydraulic excavator, which is an example of the working machinery of the present invention.

[0009] Figure 2 It was omitted. Figure 1 The diagram shows a top view of the upper rotating body of the hydraulic excavator in its working state, including the machine and cab.

[0010] Figure 3 yes Figure 2 A schematic rear view of the upper rotating body.

[0011] Figure 4 It is a schematic representation along the included Figure 1 The top view of the internal structure of the machine room when the horizontal plane of line AA cuts through the above-mentioned hydraulic excavator.

[0012] Figure 5 This is a schematic rear view of the internal structure of the aforementioned machine room, with the side walls of the machine room omitted.

[0013] Figure 6 This is a perspective view of the seat support platform and support structure of the aforementioned hydraulic excavator viewed from a rearward angle.

[0014] Figure 7 This is an exploded perspective view of the aforementioned seat support platform and the aforementioned support structure.

[0015] Figure 8 This is a three-dimensional view of the aforementioned support structure as seen from a rearward angle.

[0016] Figure 9 This is a perspective view of the aforementioned support structure viewed from a diagonal front.

[0017] Explanation of reference numerals in the attached figures

[0018] 1…Hydraulic excavator (operating machinery); 43…Machinery room; 43L…Left side cover (cover component); 43S…Seat support platform; 44a…Driver's seat; 70…Controller; 70a…First controller; 70b…Second controller; 70c…Third controller; 72…Control valve; 81…Left support frame (support frame); 811…First erection section; 811a…First upper end; 812…Second erection section; 812H…Midway section; 812a…Second upper end; 812b…Second lower end; 813…Connecting part; BR…Bracket; BR-f…Leading edge; BR-u…Upper edge; BR1…First surface (one surface of the bracket); BR2…Second surface (the other surface of the bracket); EG…Engine (prime mover); HE…Heat exchanger; P…Hydraulic pump. Detailed Implementation

[0019] The embodiments of the present invention are described below based on the accompanying drawings.

[0020] [1. General Structure of the Operating Machinery]

[0021] Figure 1 This is a left-side view showing a schematic structure of a hydraulic excavator 1, an example of a working machine according to one embodiment of the present invention. The hydraulic excavator 1 includes a lower traveling body 2, a working body 3, and an upper slewing body 4.

[0022] In this embodiment, the directions are defined as follows. The direction facing the operator (driver, operator) seated in the driver's seat 44a located on the upper rotating body 4 is defined as "forward," and the opposite direction is defined as "rear." When the upper rotating body 4 is not rotated relative to the lower traveling body 2 (rotation angle is 0 degrees), the forward / backward direction of the upper rotating body 4 is the same as the forward / backward direction of the lower traveling body 2. The accompanying drawings show the hydraulic excavator 1 in the state where the upper rotating body 4 is not rotated relative to the lower traveling body 2. Furthermore, from the operator's perspective seated in the driver's seat 44a, the left side is defined as "left," and the right side as "right." Additionally, the direction of gravity perpendicular to both the forward / backward and left / right directions is defined as the up / down direction, with the upstream side of the gravity direction defined as "up," and the downstream side as "down." In the accompanying drawings, the front is indicated by the symbol "F", the rear by the symbol "B", the right by the symbol "R", the left by the symbol "L", the top by the symbol "U", and the bottom by the symbol "D", as needed.

[0023] The lower traveling body 2 includes a pair of left and right tracks 21, a pair of left and right travel motors 22, and a bulldozer blade 23. The left and right travel motors 22 drive the left and right tracks 21 respectively, thereby enabling the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The bulldozer blade 23, used for leveling land and other operations, is located at the front of the lower traveling body 2. The bulldozer blade 23 rotates via a bulldozer blade cylinder (not shown). The bulldozer blade cylinder is a hydraulic cylinder.

[0024] The work machine 3 is equipped with a boom 31, a stick 32, and a bucket 33. It can perform excavation operations such as digging sand and soil by independently driving the boom 31, stick 32, and bucket 33.

[0025] The boom 31 includes a lower boom 31a, an upper boom 31b, and a stick support 31c. The base end of the lower boom 31a is connected to the right front part 4a of the upper rotating body 4 (see reference) in a manner that allows it to rotate in both vertical and horizontal directions. Figure 2The front end of the boom cylinder (not shown) is connected to the front end of the lower boom 31a. The base end of the boom cylinder is connected to the right front part 4a of the upper slewing body 4. More specifically, the boom cylinder is positioned forward of the lower boom 31a. The boom cylinder is freely movable. When the boom cylinder extends or retracts, the lower boom 31a rotates relative to the upper slewing body 4 in both vertical and horizontal directions.

[0026] The base end of the upper boom 31b is connected to the front end of the lower boom 31a in a manner that allows rotation in the left and right directions. The stick support 31c is connected to the front end of the upper boom 31b in a manner that allows rotation in the left and right directions. The base end of the offset cylinder 31b1 is connected to the left side of the base end of the upper boom 31b. The front end of the offset cylinder 31b1 is connected to the left side of the stick support 31c. The offset cylinder 31b1 is freely movable. The left side of the stick support 31c and the left side of the front end of the lower boom 31a are connected by a connecting rod 31b2.

[0027] When the offset cylinder 31b1 extends or retracts, the upper boom 31b rotates in the left-right direction relative to the lower boom 31a, and the stick support bar 31c moves (offsets) in the left-right direction. At this time, the stick support bar 31c rotates in the left-right direction relative to the upper boom 31b. Thus, the stick support bar 31c moves in the left-right direction relative to the lower boom 31a, but does not rotate in the left-right direction.

[0028] The base end of the stick 32 is connected to the stick support bar 31c in a manner that allows it to rotate in the vertical and horizontal directions as well as the front and back directions. The front end of the stick cylinder 32a is connected to the base end of the stick 32. The middle part between the front end and the base end of the stick cylinder 32a is connected to the stick support bar 31c. The stick cylinder 32a is freely movable in both vertical and horizontal directions. When the stick cylinder 32a extends or retracts, the stick 32 rotates relative to the stick support bar 31c in both vertical and horizontal directions.

[0029] The bucket 33 is connected to the front end of the stick 32 in a manner that allows it to rotate in the vertical and horizontal directions as well as the front and back directions. The bucket 33 is also connected to the stick 32 via a bucket link 34. The base end of the bucket cylinder 33a is connected to the base end of the stick 32. The front end of the bucket cylinder 33a is connected to the bucket link 34. The bucket cylinder 33a is freely movable in both vertical and horizontal directions. When the bucket cylinder 33a extends or retracts, the bucket 33 rotates relative to the stick 32 in both vertical and horizontal directions.

[0030] The boom cylinder, offset cylinder 31b1, stick cylinder 32a, and bucket cylinder 33a are all composed of hydraulic cylinders.

[0031] The upper slewing body 4 is located above the lower traveling body 2 and is rotatably mounted relative to the lower traveling body 2 via a slewing bearing (not shown). The upper slewing body 4 includes a slewing frame 41, a slewing motor 42, a machine room 43, a driver's section 44, and a driver's cab 100. That is, the hydraulic excavator 1 includes a driver's cab 100.

[0032] The upper rotating body 4 rotates via the aforementioned slewing bearing by being driven by a slewing motor 42 disposed on the slewing frame 41. The slewing motor 42 is a hydraulic motor.

[0033] The engine EG is housed in the machine room 43. The engine EG is the prime mover that drives the hydraulic excavator 1. The engine EG is made of a diesel engine, but is not limited to this; for example, it can also be made of a gasoline engine.

[0034] In the machine room 43, in addition to the engine EG, a hydraulic pump P is also housed (see reference). Figure 4 (etc.). The aforementioned hydraulic pump P supplies working oil (hydraulic oil) to the hydraulic motor and hydraulic cylinder. The aforementioned hydraulic motor is, for example, a left and right travel motor 22 and a swing motor 42. The aforementioned hydraulic cylinder is, for example, a bulldozer blade cylinder, a boom cylinder, a counterweight cylinder 31b1, a stick cylinder 32a, and a bucket cylinder 33a. Furthermore, the hydraulic motor and hydraulic cylinder driven by working oil are collectively referred to as hydraulic actuators.

[0035] The driver's unit 44 is located on the upper left side of the upper rotating body 4. More specifically, the driver's unit 44 is located near the left side of the work machine 3. A driver's seat 44a is provided in the driver's unit 44. A plurality of control components 44b are arranged around the driver's seat 44a. The plurality of control components 44b are configured to include levers, switches, pedals, etc. By having an operator sit in the driver's seat 44a and operate the plurality of control components 44b, the aforementioned hydraulic actuator is driven. As a result, the lower traveling body 2 can be moved, land leveling operations can be performed using the bulldozer blade 23, excavation operations can be performed using the work machine 3, and rotation of the upper rotating body 4 can be performed.

[0036] The cab 100 is configured to cover the driver's section 44. That is, the cab 100 is located on the upper left side of the upper slewing body 4. The work machine 3 is located on the right side of the cab 100 within the upper slewing body 4. A door 100D is located in the cab 100, to the left front of the driver's seat 44a. The operator can move up and down relative to the driver's section 44 by opening and closing the door 100D.

[0037] [2. Detailed structure of the upper rotating body]

[0038] Figure 2 It was omitted. Figure 1 The diagram shows a top view of the upper rotating body 4 in the state of the work machine 3 and the cab 100. Figure 3 yes Figure 2 The schematic rear view of the upper rotating body 4 is shown. The driver's seat 44a, which is disposed in the driver's unit 44 of the upper rotating body 4, is supported from below by a seat support platform 43S. That is, the hydraulic excavator 1 has a seat support platform 43S that supports the driver's seat 44a. The seat support platform 43S is constructed by connecting multiple metal plates in a stepped manner from the lower front part of the driver's seat 44a toward the upper rear part (see reference). Figure 7 ).

[0039] The driver's unit 44 is provided with a right control lever 44b1, a left control lever 44b2, a function limiting lever 44b3, a pair of driving levers 44b4 and a plurality of pedals 44b5 as the aforementioned control components 44b.

[0040] The right operating lever 44b1 is supported by the right control box 45R located on the right side of the driver's seat 44a. The left operating lever 44b2 and the function limiting lever 44b3 are supported by the left control box 45L located on the left side of the driver's seat 44a. The function limiting lever 44b3 is a lever used to switch the drive of the hydraulic actuator on and off, and is provided to limit the function of the hydraulic actuator as needed. A pair of travel levers 44b4 and multiple pedals 44b5 are arranged in front of the driver's seat 44a.

[0041] An air conditioning unit 50 is located on the floor 44F of the driver's compartment 44, in front of the right side of the driver's seat 44a. The air conditioning unit 50 contains an evaporator, blower, heater core, and other equipment necessary for air conditioning (temperature adjustment). An outdoor unit 54 is located on the seat support platform 43S, behind the driver's seat 44a. The outdoor unit 54 includes a compressor for compressing refrigerant and a condenser for heat exchange. By circulating the refrigerant between the air conditioning unit 50 and the outdoor unit 54, and by exchanging heat in each of the evaporator of the air conditioning unit 50 and the condenser of the outdoor unit 54, the air inside the driver's compartment 100 (internal air) or the air drawn into the air conditioning unit 50 from the outside (external air) is cooled. Then, driven by the blower, cold air is blown into the interior of the driver's compartment 100 from the outlet of the air conditioning unit 50. On the other hand, by circulating the coolant, which has become hot in the engine EG, through the heater core and blowing air into the heater core, warm air is blown into the interior of the driver's compartment 100 from the outlet.

[0042] A monitor 60 is mounted above the air conditioning unit 50. The monitor 60 is a display device that displays various information. For example, the monitor 60 displays various settings of the hydraulic excavator 1, fuel level, timer, and images captured by the monitoring camera when it is equipped with a monitoring camera. The monitor 60 is supported, for example, by a beam (not shown) extending to the left from the right side wall of the cab 100.

[0043] A control valve CV is located below the floor 44F of the driver's unit 44. The control valve CV is an assembly of directional switching valves corresponding to each hydraulic actuator. The directional switching valves control the flow direction and flow rate of the working oil supplied to the corresponding hydraulic actuator. In this embodiment, the control valve CV (each directional switching valve) is controlled electromagnetically. That is, it is controlled by the controller 70 (see reference 70) described later. Figure 4 (etc.) outputs a control signal to the solenoid proportional valve of control valve CV to control the flow from hydraulic pump P (reference) Figure 4 (etc.) The flow direction and flow rate of the working oil supplied to the hydraulic actuator.

[0044] A communication unit 43a is located on the right side of the outdoor unit 54 on the seat support platform 43S. The communication unit 43a includes an antenna and a positioning unit, and is configured for communication with the outside and for determining the vehicle's position. Further to the right of the communication unit 43a on the seat support platform 43S, a light 43b is located. The light 43b illuminates when the hydraulic excavator 1 is operating or to warn of surroundings. A cover 43c is rotatably connected in a vertical direction to the right side of the light 43b on the seat support platform 43S. The cover 43c is opened by rotating it upwards, allowing access to, for example, the internal fuel tank for refueling.

[0045] like Figure 3 As shown, the machine room 43 is provided with a right side cover 43R, a rear cover 43B, a left side cover 43L, and a lower left cover 43LU. The right side cover 43R is a cover component forming the right side wall of the machine room 43. An opening 43Rp is provided in the right side cover 43R. The opening 43Rp is provided to allow air to circulate between the interior and exterior of the machine room 43. By blowing the aforementioned air through the heat exchanger HE (described later)... Figure 4 and Figure 5 It can cool the cooling water passing through the heat exchanger HE and can cool the engine EG. A mesh protective device is provided at the opening 43Rp as a safety measure, but the shape of the protective device is not limited to mesh.

[0046] The rear cover 43B is a cover component forming the rear wall of the machine chamber 43. A counterweight 43W for weight balance with the work machine 3 is installed below the rear cover 43B. The left side cover 43L is a cover component forming the left side wall of the machine chamber 43. The lower left cover 43LU is a cover component forming the side wall below the left side cover 43L. The right side cover 43R, left side cover 43L, and lower left cover 43LU are detachably mounted to the machine chamber 43 by bolts or the like. The rear cover 43B is rotatably mounted at the rear of the machine chamber 43, for example, in a right-opening manner, but it can also be detachably mounted at the rear of the machine chamber 43 by bolts or the like.

[0047] [3. Internal structure of the machine room]

[0048] Figure 4 It is a schematic representation of the use of inclusion. Figure 1 The AA line is a top view of the internal structure of the machine room 43 of the hydraulic excavator 1 when the horizontal plane cuts through it. Furthermore, the AA line passes through the engine EG. Figure 5 This is a schematic rear view of the internal structure of the machine room 43, showing a configuration where the side walls of the machine room 43 are omitted. Furthermore, in Figure 5 For convenience, the outline of the left side cover 43L is represented by a double-dotted line.

[0049] like Figure 4 and Figure 5 As shown, a hydraulic pump P is located on the left side of the machine compartment 43, relative to the engine EG. On the other hand, a heat exchanger HE is located on the right side of the machine compartment 43, relative to the engine EG. The heat exchanger HE includes a radiator and an oil cooler.

[0050] The radiator is a first heat exchanger connected to the water jacket of the engine EG via piping, and cools the refrigerant passing through the water jacket. The radiator cools the refrigerant through heat exchange, supplying the refrigerant from the radiator to the engine EG (water jacket), thereby cooling the engine EG. The refrigerant is, for example, cooling water.

[0051] The oil cooler is a second heat exchanger connected to the oil circuit circulating via the aforementioned hydraulic pump P and hydraulic actuator. The oil cooler cools the working oil flowing in the aforementioned oil circuit, driven by the hydraulic pump P, through heat exchange. The oil cooler is, for example, arranged side-by-side with the radiator in the front-rear direction. Alternatively, the oil cooler may be configured such that at least a portion overlaps with the radiator.

[0052] A fan F is installed between the engine EG and the heat exchanger HE (see reference). Figure 4 The rotational power of the crankshaft of engine EG is transmitted to fan F via the fan belt and fan pulley. As a result, fan F is driven to rotate.

[0053] When fan F is driven, fan F directs air toward heat exchanger HE. More specifically, by driving fan F, for example from a source located on rotating frame 41 (see reference 41), Figure 1 Air is drawn into the interior of the machine room 43 through the vent (not shown), and the drawn air flows toward the heat exchanger HE. As a result, the heat exchanger HE is cooled. In other words, the refrigerant (cooling water) flowing in the radiator of the heat exchanger HE is cooled, and the working oil flowing in the oil cooler is cooled.

[0054] The air cooling the heat exchanger HE flows through the gaps in the heat exchanger HE or along the surface of the heat exchanger HE, toward the opening 43Rp (refer to). Figure 3 The air is discharged from the opening 43Rp to the outside of the machine chamber 43. This method of cooling the heat exchanger HE through such airflow is called "exhaust type". Alternatively, a fan F can be driven to draw air from the opening 43Rp into the interior of the machine chamber 43, causing the drawn-in air to blow onto the heat exchanger HE, thereby cooling the heat exchanger HE. This method of cooling the heat exchanger HE through such airflow is called "intake type".

[0055] The aforementioned fan F is surrounded by a housing CA. The housing CA is a fan shroud with openings on both the heat exchanger HE side and the engine EG side. Cooling air generated by driving the fan F flows through the interior of the housing CA, for example, from the engine EG side toward the heat exchanger HE side.

[0056] As described above, the hydraulic excavator 1 of this embodiment is designated as "one side" relative to the engine EG, which serves as the prime mover, and "the other side" relative to the engine EG, which serves as the prime mover. This can be described as follows: The hydraulic excavator 1 includes: a hydraulic pump P, disposed on one side relative to the prime mover within the machine chamber 43; and a heat exchanger HE, disposed on the other side relative to the prime mover within the machine chamber 43.

[0057] Inside the machine compartment 43, a bracket BR is positioned on the left side relative to the engine EG. Thus, the bracket BR is positioned opposite the left side cover 43L within the machine compartment 43. The bracket BR is, for example, made of metal plate, and is supported within the machine compartment 43 by a left support frame 81 (see reference). Figures 6-9 Support. Furthermore, details regarding the support method for the bracket BR will be described later.

[0058] A first controller 70a is mounted on the bracket BR. The first controller 70a is one type of controller 70. The first controller 70a is an electrically controlled controller, for example, composed of an electronic control unit also known as an ECU (Electronic Control Unit). For example, the first controller 70a controls the hydraulic pump P and the control valve CV (see reference). Figure 4 Electronic control is implemented.

[0059] The first controller 70a is mounted on one side of the bracket BR, namely the first side BR1. The first side BR1 is the side of the bracket BR, that is, the side opposite to the left side cover 43L (the opposite side to the side opposite to the hydraulic pump P). Thus, the hydraulic excavator 1 has a bracket BR, which is arranged in the machine room 43 in a manner opposite to the removable cover part (left side cover 43L) forming the side wall of the machine room 43, and a controller 70 (specifically the first controller 70a) is mounted thereon.

[0060] A second controller 70b is also installed in the machine room 43. Like the first controller 70a, the second controller 70b is a type of controller 70, for example, composed of an ECU. The second controller 70b controls the electrical installations (e.g., [missing information]) located inside the hydraulic excavator 1. Figure 2 The integrated controller controls the monitor 60 and the hydraulic pump P, etc., in conjunction with the first controller 70a.

[0061] The second controller 70b is mounted on the mounting support ST. The mounting support ST is fixed to the front wall 43S1 of the seat support 43S, which extends upward from the lower front side of the driver's seat 44a. Thus, the second controller 70b is positioned to the side of the hydraulic pump P and in front of the bracket BR.

[0062] A third controller 70c is also installed in the machine room 43. Like the first controller 70a and the second controller 70b, the third controller 70c is a type of controller 70, for example, composed of an ECU. The third controller 70c is mounted on the other side of the bracket BR, namely the second side BR2. The second side BR2 is the side of the bracket BR opposite to the first side BR1, that is, the side opposite to the hydraulic pump P.

[0063] The third controller 70c is a controller used for machine guidance or control. The third controller 70c is an optional controller; that is, it is installed as needed.

[0064] For example, when a posture detection sensor is installed at a specified position (e.g., boom 32) on the work machine 3, the third controller 70c can, based on the detection results of the aforementioned sensor, enable the monitor 60 (refer to...) Figure 2The system displays guidance information. Based on this guidance information displayed on the monitor 60, the operator can manipulate the control component 44b to position the bucket 33 as desired. In this case, machine guidance is implemented to guide the operation of the work machine 3. Alternatively, if the position information of the bucket 33's tip is detected by a sensor, the third controller 70c can also perform machine control based on this position information. In machine control, based on the aforementioned position information, the third controller 70c automatically operates the work machine 3 to position the bucket 33's tip as desired.

[0065] In this embodiment, such as Figure 5 As shown, when observing the rear of the hydraulic excavator 1, the bracket BR is configured such that a portion of it is located to the left and above the hydraulic pump P. Alternatively, when observing the rear of the hydraulic excavator 1, the entire bracket BR can be configured to be located to the left and above the hydraulic pump P. That is, the bracket BR is configured such that at least a portion of it is located to the left and above the hydraulic pump P when viewed from the rear.

[0066] Within the machine compartment 43, the side with the hydraulic pump P located relative to the engine EG is more likely to have a wider free space than the side with the heat exchanger HE located relative to the engine EG. This is because the heat exchanger HE, fan F, and housing CA, which occupy a larger configuration space within the machine compartment 43, are located on the opposite side relative to the engine EG.

[0067] Inside the machine room 43, when viewed from the rear, at least a portion of the bracket BR is positioned on a side adjacent to the hydraulic pump P. This allows for efficient use of the wider free space on the side adjacent to the hydraulic pump P within the machine room 43 to accommodate the bracket BR. Furthermore, at least a portion of the bracket BR is located above the hydraulic pump P, thereby enabling... Figure 5 As shown, space can be easily provided for the wiring harness HN, which connects the controller 70 (e.g., the first controller 70a) mounted on the bracket BR to the hydraulic pump P, on one side of the hydraulic pump P and below the bracket BR. This simplifies the installation of the wiring harness HN.

[0068] Furthermore, thanks to the aforementioned configuration of the bracket BR, the first controller 70a can be positioned close to the hydraulic pump P. This allows for the connection of the first controller 70a to the hydraulic pump P using a shorter wiring harness HN. Consequently, it eliminates the need to significantly bypass the heat exchanger HE or the engine EG during wiring harness HN installation, simplifying the installation process.

[0069] Furthermore, the bracket BR is positioned opposite to the left side cover 43L, which forms the side wall of the machine compartment 43. This allows the operator (maintainer) to easily access and maintain the first controller 70a by removing the left side cover 43L. Alternatively, the first controller 70a can be removed together with the bracket BR for maintenance. In short, the opposing configuration of the bracket BR and the left side cover 43L facilitates maintenance of the first controller 70a.

[0070] like Figure 4 As shown, when viewed from above, the first controller 70a is positioned to the left of the hydraulic pump P, that is, when viewed from above, the controller 70 (especially the first controller 70a) is positioned to one side of the hydraulic pump P.

[0071] In this case, the space on one side of the hydraulic pump P can be effectively utilized to configure the first controller 70a. Additionally, as... Figure 4 As shown, on one side of the hydraulic pump P, in addition to the first controller 70a, other controllers 70 (second controller 70b, third controller 70c) can also be centrally configured. As a result, the design and configuration of the wiring harnesses connected to each controller 70 become easier.

[0072] From the viewpoint that it is easy to ensure space within the machine room 43 for arranging other controllers 70 (second controller 70b, third controller 70c) on a side further away from the hydraulic pump P and in front of the bracket BR, it is preferable that the bracket BR be arranged at an angle relative to the front-rear direction. More specifically, as Figure 4 As shown, the bracket BR is preferably configured to face forward from the rear towards the front, away from the hydraulic pump P when viewed from above.

[0073] From the viewpoint of facilitating the arrangement of wiring harnesses connected to the first controller 70a and the second controller 70b, it is preferable to centrally (summarize) the first controller 70a and the second controller 70b on one side of the hydraulic pump P within the machine room 43. From the viewpoint of easily achieving such a centralized arrangement, such as... Figure 4 and Figure 5 As shown, the second controller 70b is preferably positioned above the hydraulic pump P and in front of the bracket BR. Specifically, as Figure 4 As shown, when viewed from above, the second controller 70b is preferably positioned on one side of the hydraulic pump P.

[0074] To support the first controller 70a and the third controller 70c with a smaller number of components, it is preferable to use a single bracket BR to support both the first controller 70a and the third controller 70c simultaneously. From this perspective, it is preferable, as in this embodiment, that the first controller 70a is mounted on the first surface BR1 of the bracket BR, and the third controller 70c is mounted on the second surface BR2 of the bracket BR.

[0075] [4. Regarding the support method of the bracket]

[0076] Next, the method of supporting the bracket BR inside the machine room 43 will be described. Figure 6 This is a perspective view of the seat support platform 43S and the support structure 80 viewed from the rear. Figure 7 yes Figure 6 The diagram shows an exploded perspective view of the seat support platform 43S and the support structure 80. The support structure 80 is a structure that supports the seat support platform 43S from below on the rotating frame 41. The aforementioned bracket BR is supported by the support structure 80. The details of the support structure 80 will be described below.

[0077] (4-1. Structure of the supporting structure)

[0078] Figure 8 This is a perspective view of the supporting structure 80 viewed from the rear. Figure 9 This is a perspective view of the support structure 80 as seen from a diagonal front. The support structure 80 is configured to have a left support frame 81, a right support frame 82, and an upper frame 83.

[0079] Left support frame 81 in machine room 43 (see reference) Figure 4 The internal arrangement of the left support frame (etc.) is on the left side, which is closer to the center in the left-right direction. The left support frame 81 has a first erection part 811, a second erection part 812, and a connecting part 813.

[0080] The first erection 811 is erected inside the machine room 43. More specifically, the first erection 811 is erected on the left front support 91 of the rotating frame 41. The left front support 91 is erected on one side (left side) of the rotating frame 41 and in the center of the front-rear direction. The left front support 91 is fastened to the rotating frame 41 by bolts, but it can also be fixed to the rotating frame 41 by welding. In addition to supporting the first erection 811, the left front support 91 also supports the front wall 43S1 of the seat support platform 43S. Therefore, the left front support 91 constitutes the support platform support for the seat support platform 43S.

[0081] The second erected part 812 is installed inside the machine room 43, positioned rearward than the first erected part 811. More specifically, the second erected part 812 is installed at the intersection of the left longitudinal plate 92 and the transverse plate 93 on the rotating frame 41. The second erected part 812 is fastened to the intersection, for example, by bolts, but it can also be fixed to the intersection by welding. The transverse plate 93 is installed at the rear of the rotating frame 41 and extends in the left-right direction. The left longitudinal plate 92 is installed in the rotating frame 41 to the right of the first erected part 811 and extends forward from the left end of the transverse plate 93. The left longitudinal plate 92 and the transverse plate 93 are provided to increase the rigidity of the rotating frame 41 relative to the weight of the machine 3. The left longitudinal plate 92 and the transverse plate 93 are installed on the rotating frame 41, for example, by welding. The second erected part 812 extends upward than the first erected part 811.

[0082] The connecting part 813 connects the first erected part 811 and the second erected part 812. More specifically, the connecting part 813 connects to the first upper end part 811a, which is the upper end of the first erected part 811 (see reference). Figure 9 The intermediate portion 812H in the vertical direction is connected to the second erected portion 812. The intermediate portion 812H is located between the second upper end portion 812a, which is the upper end of the second erected portion 812, and the second lower end portion 812b, which is the lower end of the second erected portion 812. Furthermore, the position of the intermediate portion 812H in the vertical direction is not particularly limited. For example, the intermediate portion 812H may be located in the middle between the second upper end portion 812a and the second lower end portion 812b, or it may be located closer to the second upper end portion 812a than the intermediate portion, or it may be located closer to the second lower end portion 812b than the intermediate portion.

[0083] In this embodiment, the connecting part 813 is integrally formed with the first erecting part 811, but it may also be formed as a separate component from the first erecting part 811 and connected to it. Furthermore, the connecting part 813 is bolted to the second erecting part 812 at the midpoint 812H, but it may also be integrally formed with the second erecting part 812. Through the connecting part 813, the first erecting part 811 and the second erecting part 812 are erected in the front-back direction (strictly speaking, the direction in which they are tilted relative to the front-back direction when viewed from above).

[0084] The right support frame 82 is located in the machine room 43 on the opposite side from the center in the left-right direction, i.e., on the right side. The right support frame 82 has a first frame 821, a second frame 822, and a third frame 823.

[0085] The second frame 822 is erected at the intersection of the horizontal plate 93 and the right longitudinal plate 94 on the rotating frame 41. The right longitudinal plate 94 is erected on the rotating frame 41 and extends forward from the right end of the horizontal plate 93. Like the left longitudinal plate 92 and the horizontal plate 93, the right longitudinal plate 94 is also provided to increase the rigidity of the rotating frame 41 relative to the weight of the working machine 3. The right longitudinal plate 94 is, for example, welded onto the rotating frame 41.

[0086] The first frame 821 is positioned inside the machine room 43, forward of the second frame 822. The first frame 821 is fixed to the side of the right longitudinal plate 94 by bolts or the like. The third frame 823 is connected to the upper end of the first frame 821 and extends rearward, and is also connected to the upper end of the second frame 822. In this embodiment, the third frame 823 is integrally formed with the first frame 821, but it can also be formed as a separate component from the first frame 821 and connected to it. Furthermore, the third frame 823 is connected to the second frame 822 via a connecting strut 824, but it can also be integrally formed with the second frame 822. The first frame 821 and the second frame 822 are erected in the front-rear direction via the third frame 823.

[0087] The upper frame 83 is connected to the upper end of the left support frame 81 (the second upper end 812a of the second erected part 812) and the upper end of the right support frame 82 (connecting strut 824) by welding or the like. The upper frame 83 extends in the left-right direction. Figure 7 As shown, the upper frame 83 is fastened to the lower surface of the seat support platform 43S by bolts or the like. Thus, the seat support platform 43S is supported by the support structure 80.

[0088] (4-2. Bracket support method)

[0089] like Figures 6-9 As shown, the bracket BR is fixed to the first erection portion 811 and the connecting portion 813 of the left support frame 81. The bracket BR is fixed to the first erection portion 811 and the connecting portion 813, for example, by bolts. Alternatively, the bracket BR can be fixed by methods other than bolts. In this way, the bracket BR is fixed to the components (first erection portion 811 and connecting portion 813) that support the seat support platform 43S, thereby the bracket BR is stably supported inside the machine room 43.

[0090] In particular, in this embodiment, such as Figure 8As shown, the leading edge BR-f of the bracket BR is fixed to the first erecting part 811. Furthermore, the upper edge BR-u of the bracket BR is fixed to the connecting part 813. In this method of fixing the bracket BR, since the bracket BR is configured to extend downwards relative to the connecting part 813, the empty space below the connecting part 813 is effectively utilized as a space for the bracket BR and the controller 70. Moreover, since the leading edge BR-f of the bracket BR is fixed to the first erecting part 811, even in situations where… Figure 8 When the bracket BR is suspended and supported on the connecting part 813 in that way, the support of the bracket BR is also stable.

[0091] From the viewpoint of reliably configuring the controller 70 in the empty space below the connection portion 813, the controller 70 is preferably configured as follows. That is, as Figure 8 As shown, the controller 70 (e.g., the first controller 70a) is preferably positioned below the upper edge BR-u of the bracket BR.

[0092] Furthermore, from the viewpoint of effectively utilizing the empty space between the first installation section 811 and the second installation section 812, the controller 70 is preferably configured as follows: that is, the controller 70 (e.g., the first controller 70a) is preferably configured between the first installation section 811 and the second installation section 812.

[0093] In particular, such as Figure 8 and Figure 9 As shown, the bracket BR is preferably fixed to the first erector 811 and the connecting portion 813 in a manner that separates it from the second erector 812 (forward). This is based on the following reason: In a structure where the bracket BR is separately configured from the second erector 812, a gap GP is formed between the bracket BR and the second erector 812. Therefore, by using the left side cover 43L (refer to...) Figure 5 The bracket BR can be removed and accessed from the first side BR1 via the gap GP to the second side BR2. Therefore, even if another controller 70 (a third controller 70c in this embodiment) is installed on the second side BR2 of the bracket BR, it is easy to maintain the other controller 70.

[0094] In this embodiment, as described above, the connecting portion 813 of the left support frame 81 is connected to the first upper end portion 811a of the first erected portion 811 and the middle portion 812H of the second erected portion 812. By fixing the bracket BR to the left support frame 81 with this structure, the bracket BR utilizing the support structure 80 having the left support frame 81 is configured within the machine room 43.

[0095] In particular, as described above, the left support frame 81 of the support structure 80 supporting the seat support platform 43S includes a first erection portion 811, a second erection portion 812, and a connecting portion 813. In this structure of the left support frame 81, as described above, the bracket BR can be fixed to the first erection portion 811 and the connecting portion 813. Therefore, the structure of the left support frame 81 is effective in that it can be reliably and effectively utilized not only as a frame supporting the seat support platform 43S, but also as a frame supporting the bracket BR.

[0096] [5. Supplement]

[0097] In this embodiment, the structure of the hydraulic excavator 1 having a cab 100 is described, but it is also possible to have a canopy instead of a cab 100.

[0098] The hydraulic excavator 1 can also be a structure that combines hydraulic equipment such as hydraulic actuators (e.g., hydraulic motors, hydraulic cylinders) and electrically driven actuators. Electrically driven actuators include, for example, electric travel motors, electric cylinders, and electric swing motors.

[0099] Hydraulic excavator 1 is equipped with engine EG (refer to...) Figure 1 It serves as the structure of a prime mover, but a prime mover can also be an electric motor.

[0100] In this embodiment, a hydraulic excavator 1 is used as an example of the working machinery, but the working machinery is not limited to a hydraulic excavator 1, and may also be construction machinery such as a mobile crane. In addition, the working machinery may also be agricultural machinery such as a combine harvester or a tractor.

[0101] [6. Postscript]

[0102] The operating machinery described in this embodiment can be represented by the following notes.

[0103] The working machine in Appendix (1) is a working machine equipped with a hydraulic pump located on one side of the machine room relative to the prime mover.

[0104] It also has:

[0105] The heat exchanger, located on the opposite side of the aforementioned prime mover within the aforementioned machine room; and

[0106] A bracket, positioned opposite a detachable cover component forming the side wall of the aforementioned machine compartment, is installed within the machine compartment and houses a controller.

[0107] The bracket is configured such that, when viewed from the rear, at least a portion of it is located on the side closer to and above the hydraulic pump.

[0108] The working machinery configuration in Appendix (2) is based on the working machinery described in Appendix (1).

[0109] When viewed from above, the controller is located on one side of the hydraulic pump.

[0110] The working machinery configuration in Appendix (3) is based on the working machinery described in Appendix (1) or (2),

[0111] The bracket is configured to be positioned away from the hydraulic pump from the rear when viewed from above.

[0112] The working machinery configuration in Appendix (4) is based on the working machinery described in any of the appendices (1) to (3),

[0113] It also has:

[0114] The first installation unit is installed inside the aforementioned machine room;

[0115] The second installation is installed inside the aforementioned machine room at a position further rear than the first installation; and

[0116] The connecting part connects the first erected part and the second erected part.

[0117] The bracket is fixed to the first erected part and the connecting part.

[0118] The working machinery configuration in Appendix (5) is based on the working machinery described in Appendix (4).

[0119] The front edge of the aforementioned bracket is fixed to the aforementioned first erected part.

[0120] The upper edge of the bracket is fixed to the connecting part.

[0121] The working machinery configuration in Appendix (6) is based on the working machinery described in Appendix (5).

[0122] The controller is positioned below the upper edge of the bracket.

[0123] The working machinery configuration in Appendix (7) is based on the working machinery described in any of Appendix (4) to (6),

[0124] The controller is located between the first erected section and the second erected section.

[0125] The working machinery configuration in Appendix (8) is based on the working machinery described in Appendix (7).

[0126] The bracket is fixed to the first erected part and the connecting part in a manner that separates it from the second erected part.

[0127] The working machinery configuration in Appendix (9) is based on the working machinery described in any of Appendix (4) to (8),

[0128] The second erected part extends upward compared to the first erected part.

[0129] The aforementioned connecting part is connected to the upper end of the aforementioned first erected part and the middle part in the vertical direction of the aforementioned second erected part.

[0130] The operating machinery configuration in Appendix (10) is based on the operating machinery described in any of the appendices (4) to (9),

[0131] It also has:

[0132] Seat support platform, supporting the driver's seat; and

[0133] Support frame, supporting the aforementioned seat support platform.

[0134] The aforementioned support frame includes the aforementioned first erected part, the aforementioned second erected part, and the aforementioned connecting part.

[0135] The working machinery configuration in Appendix (11) is based on the working machinery described in any of the appendices (1) to (10),

[0136] When the above controller is set as the first controller,

[0137] It also has a second controller configured inside the aforementioned machine room.

[0138] The second controller is positioned above the hydraulic pump and in front of the bracket.

[0139] The working machinery configuration in Appendix (12) is based on the working machinery described in Appendix (11),

[0140] When viewed from above, the second controller is located on one side of the hydraulic pump.

[0141] The working machinery configuration in Appendix (13) is based on the working machinery described in any of the appendices (1) to (12),

[0142] When the above controller is set as the first controller,

[0143] It also has a third controller configured inside the aforementioned machine room.

[0144] The first controller is mounted on one side of the bracket.

[0145] The third controller is installed on the other side of the bracket.

[0146] The embodiments of the present invention have been described above, but the scope of the present invention is not limited thereto, and it can be implemented by expanding or modifying it within the scope of the spirit of the invention.

[0147] Industrial applicability

[0148] This invention can be applied to operational machinery such as engineering machinery and agricultural machinery.

Claims

1. A working machine comprising a hydraulic pump disposed on one side of a machine room relative to a prime mover, characterized in that, The operating machinery also has: The heat exchanger is disposed on the opposite side of the prime mover within the machine room; and A bracket, positioned opposite a removable cover component forming the side wall of the machine chamber, is installed inside the machine chamber and houses a controller. The bracket is configured such that, when viewed from the rear, at least a portion is located on the side closer to and above the hydraulic pump.

2. The operating machinery according to claim 1, characterized in that, When viewed from above, the controller is positioned to one side of the hydraulic pump.

3. The operating machinery according to claim 1, characterized in that, The bracket is configured to be positioned away from the hydraulic pump from the rear towards the front when viewed from above.

4. The operating machinery according to claim 1, characterized in that, It also has: The first installation unit is installed inside the machine room; The second erected part is installed inside the machine room at a position further rear than the first erected part; and The connecting part connects the first erected part and the second erected part. The bracket is fixed to the first erected part and the connecting part.

5. The operating machinery according to claim 4, characterized in that, The front edge of the bracket is fixed to the first erected part. The upper edge of the bracket is fixed to the connecting part.

6. The operating machinery according to claim 5, characterized in that, The controller is positioned below the upper edge of the bracket.

7. The operating machinery according to claim 4, characterized in that, The controller is configured between the first erection section and the second erection section.

8. The operating machinery according to claim 7, characterized in that, The bracket is fixed to the first erected part and the connecting part in a manner that separates it from the second erected part.

9. The operating machinery according to claim 4, characterized in that, The second erected part extends upward compared to the first erected part. The connecting part is connected to the upper end of the first erected part and the middle part in the vertical direction of the second erected part.

10. The operating machinery according to claim 4, characterized in that, It also has: Seat support platform, supporting the driver's seat; and Support frame, supporting the seat support platform. The support frame includes the first erected part, the second erected part, and the connecting part.

11. The operating machinery according to claim 1, characterized in that, When the controller is set as the first controller It also has a second controller configured inside the machine room. The second controller is positioned above the hydraulic pump and in front of the bracket.

12. The operating machinery according to claim 11, characterized in that, When viewed from above, the second controller is positioned to one side of the hydraulic pump.

13. The operating machinery according to any one of claims 1 to 12, characterized in that, When the controller is set as the first controller It also features a third controller located inside the machine room. The first controller is mounted on one side of the bracket. The third controller is mounted on the other side of the bracket.

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