Working machinery

Abstract

The present invention provides a work machine that facilitates the routing of harnesses connected to the controller and also facilitates maintenance work on the controller. [Solution] The working machine comprises a hydraulic pump located on one side relative to the prime mover within the machine room, a heat exchanger located on the other side relative to the prime mover within the machine room, and a bracket located in the machine room facing a removable cover member forming the side wall of the machine room, to which a controller is mounted. The bracket is positioned such that, in a rear view, at least a portion of it is located on one side relative to the hydraulic pump and above the hydraulic pump.

Description

Technical Field

[0001] The present invention relates to a working machine.

Background Art

[0002] Conventionally, as an example of a working machine, a construction machine disclosed in Patent Document 1 is known. In the above construction machine, in the engine room, an intake duct, a heat exchanger, a fan shroud, a fan, an engine, and a hydraulic pump are arranged in order from the upstream side in the air flow direction. The engine is arranged below the seat stand where the driver's seat is arranged. Between the seat stand and the heat exchanger, and above the fan shroud, electrical components such as a controller are arranged. That is, the controller is arranged on the heat exchanger side with respect to the engine.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, electronic control (electronically controlled) systems have become increasingly common in industrial machinery, enabling communication between multiple electrical components. As described in Patent Document 1, in configurations where the controller is positioned on the heat exchanger side relative to the engine, the communication harness connecting the controller to other electrical components must be routed around the large heat exchanger and fan. This results in a longer harness, making routing difficult. Furthermore, when electronically controlling a hydraulic pump located on the opposite side of the engine from the fan, the harness connecting the controller to the hydraulic pump must also be routed around the large engine. This exacerbates the aforementioned problem of difficult harness routing. Moreover, if the controller is positioned between the seat stand and the heat exchanger, the heat exchanger obstructs maintenance of the controller, making maintenance work difficult.

[0005] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a work machine that facilitates the routing of harnesses connected to the controller and facilitates maintenance work on the controller. [Means for solving the problem]

[0006] A working machine according to one aspect of the present invention is a working machine equipped with a hydraulic pump located in a machine room on one side with respect to a prime mover, further comprising a heat exchanger located in the machine room on the other side with respect to the prime mover, and a bracket located in the machine room so as to face a removable cover member forming the side wall of the machine room, and to which a controller is mounted, wherein, in a rear view, at least a portion of the bracket is located on the one side with respect to the hydraulic pump and above the hydraulic pump. [Effects of the Invention]

[0007] The above configuration simplifies the routing of the harness connected to the controller and also facilitates maintenance work on the controller. [Brief explanation of the drawing]

[0008] [Figure 1] This is a left side view showing a schematic configuration of a hydraulic excavator, which is an example of a work machine of the present invention. [Figure 2] This is a plan view of the upper rotating body of the hydraulic excavator, with the working equipment and cabin shown in Figure 1 omitted. [Figure 3] Figure 2 is a schematic rear view of the upper rotating body. [Figure 4] This is a schematic plan view showing the internal configuration of the machine room when the hydraulic excavator is cut in the horizontal plane containing line AA in Figure 1. [Figure 5] This is a schematic rear view showing the internal configuration of the machine room, with the side walls of the machine room omitted from the illustration. [Figure 6] This is a perspective view of the seat support base and support structure of the hydraulic excavator shown above, viewed from the rear at an oblique angle. [Figure 7] This is an exploded perspective view of the seat support base and the support structure described above. [Figure 8] This is a perspective view of the above support structure from a diagonal rearward angle. [Figure 9] This is a perspective view of the above support structure from a diagonal front angle. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings.

[0010] [1. Outline configuration of the work machine] Figure 1 is a left side view showing a schematic configuration of a hydraulic excavator 1, which is an example of a work machine according to one embodiment of the present invention. The hydraulic excavator 1 comprises a lower traveling body 2, a work machine 3, and an upper rotating body 4.

[0011] In this embodiment, directions are defined as follows: The direction in which the operator (driver, operator) seated in the driver's seat 44a located in the driver's section 44 of the upper slewing body 4 faces forward is defined as "front," and the opposite direction is defined as "rear." When the upper slewing body 4 is not slewing relative to the lower traveling body 2 (slewing angle 0 degrees), the front-rear direction of the upper slewing body 4 coincides with the front-rear direction of the lower traveling body 2. The drawing shows the hydraulic excavator 1 in the state where the upper slewing body 4 is not slewing relative to the lower traveling body 2. Also, the left side as seen from the perspective of the operator seated in the driver's seat 44a is defined as "left," and the right side as "right." Furthermore, the direction of gravity perpendicular to the front-rear and left-right directions is defined as the up-down direction, with the upstream side of the direction of gravity being defined as "up," and the downstream side as "down." In the drawing, the forward direction is indicated by the symbol "F," the rear by "B," the right by "R," the left by "L," the upper by "U," and the lower by "D," as needed.

[0012] The lower travel body 2 comprises a pair of left and right crawlers 21, a pair of left and right travel motors 22, and a blade 23. The left and right travel motors 22 drive the left and right crawlers 21 respectively, allowing the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The blade 23, which performs leveling work, is located on the front side of the lower travel body 2. The blade 23 is rotated by a blade cylinder (not shown). The blade cylinder is a hydraulic cylinder.

[0013] The work machine 3 comprises a boom 31, an arm 32, and a bucket 33. By independently driving the boom 31, arm 32, and bucket 33, excavation work of soil and other materials can be performed.

[0014] The boom 31 has a lower boom 31a, an upper boom 31b, and an arm stay 31c. The base end portion of the lower boom 31a is connected to the right front portion 4a (see FIG. 2) of the upper revolving body 4 so as to be rotatable in the vertical direction and the front-rear direction. The tip end portion of the lower boom 31a is connected to the tip end portion of a boom cylinder (not shown). The base end portion of the above boom cylinder is connected to the right front portion 4a of the upper revolving body 4. More specifically, the boom cylinder is disposed forward of the lower boom 31a. The boom cylinder is movably extendable and contractible. When the boom cylinder extends and contracts, the lower boom 31a rotates in the vertical direction and the front-rear direction with respect to the upper revolving body 4.

[0015] The base end portion of the upper boom 31b is connected to the tip end portion of the lower boom 31a so as to be rotatable in the left-right direction. The arm stay 31c is connected to the tip end portion of the upper boom 31b so as to be rotatable in the left-right direction. The base end portion of an offset cylinder 31b1 is connected to the left side surface of the base end portion of the upper boom 31b. The tip end portion of the offset cylinder 31b1 is connected to the left side surface of the arm stay 31c. The offset cylinder 31b1 is movably extendable and contractible. The left side surface of the arm stay 31c and the left side surface of the tip end portion of the lower boom 31a are connected by a link rod 31b2.

[0016] When the offset cylinder 31b1 extends and contracts, the upper boom 31b rotates in the left-right direction with respect to the lower boom 31a, and the arm stay 31c moves (offsets) in the left-right direction. At this time, the arm stay 31c rotates in the left-right direction with respect to the upper boom 31b. Thereby, the arm stay 31c moves in the left-right direction without rotating in the left-right direction with respect to the lower boom 31a.

[0017] The base end of the arm 32 is connected to the arm stay 31c so as to be rotatable in the vertical and front-rear directions. The tip of the arm cylinder 32a is connected to the base end of the arm 32. The intermediate part between the tip and the base end of the arm cylinder 32a is connected to the arm stay 31c. The arm cylinder 32a is movably telescopic. When the arm cylinder 32a expands and contracts, the arm 32 rotates in the vertical and front-rear directions with respect to the arm stay 31c.

[0018] The bucket 33 is connected to the tip of the arm 32 so as to be rotatable in the vertical and front-rear directions. The bucket 33 is also connected to the arm 32 via the bucket link 34. The base end of the bucket cylinder 33a is connected to the base end of the arm 32. The tip of the bucket cylinder 33a is connected to the bucket link 34. The bucket cylinder 33a is movably telescopic. When the bucket cylinder 33a expands and contracts, the bucket 33 rotates in the vertical and front-rear directions with respect to the arm 32.

[0019] The boom cylinder, the offset cylinder 31b1, the arm cylinder 32a, and the bucket cylinder 33a are constituted by hydraulic cylinders.

[0020] The upper slewing body 4 is located above the lower traveling body 2 and is provided so as to be slewing-capable via a slewing bearing (not shown) with respect to the lower traveling body 2. The upper slewing body 4 includes a slewing frame 41, a slewing motor 42, a machine room 43, an operation unit 44, and a cabin 100. That is, the hydraulic excavator 1 includes the cabin 100.

[0021] The upper slewing body 4 slews via the above-described slewing bearing by the drive of the slewing motor 42 disposed on the slewing frame 41. The slewing motor 42 is constituted by a hydraulic motor.

[0022] The engine EG is housed in the machine room 43. The engine EG is the prime mover that powers the hydraulic excavator 1. The engine EG is composed of a diesel engine, but is not limited to that; for example, it may be composed of a gasoline engine.

[0023] The machine room 43 houses the engine EG as well as a hydraulic pump P (see Figure 4, etc.). The hydraulic pump P supplies hydraulic fluid (pressurized oil) to the hydraulic motors and hydraulic cylinders. The hydraulic motors include, for example, the left and right travel motors 22 and the slewing motor 42. The hydraulic cylinders include, for example, the blade cylinder, boom cylinder, offset cylinder 31b1, arm cylinder 32a, and bucket cylinder 33a. The hydraulic motors and hydraulic cylinders driven by hydraulic fluid are collectively called hydraulic actuators.

[0024] The driver's unit 44 is located on the upper left side of the upper slewing body 4. More specifically, the driver's unit 44 is located to the left of the work implement 3. The driver's unit 44 is equipped with a driver's seat 44a. Multiple control members 44b are arranged around the driver's seat 44a. The multiple control members 44b consist of levers, switches, pedals, etc. When the operator sits in the driver's seat 44a and operates the multiple control members 44b, the hydraulic actuator is driven. This enables the lower traveling body 2 to travel, leveling work with the blade 23, excavation work with the work implement 3, rotation of the upper slewing body 4, etc.

[0025] The cabin 100 is positioned to cover the driver's compartment 44. That is, the cabin 100 is positioned on the upper left side of the upper slewing body 4. The work equipment 3 is positioned to the right of the cabin 100 on the upper slewing body 4. In the cabin 100, a door 100D is positioned to the left front of the driver's seat 44a. The operator can enter and exit the driver's compartment 44 by opening and closing the door 100D.

[0026] [2. Detailed configuration of the upper rotating body] Figure 2 is a plan view of the upper slewing body 4, with the working equipment 3 and cabin 100 shown in Figure 1 omitted. Figure 3 is a schematic rear view of the upper slewing body 4 shown in Figure 2. The driver's seat 44a, located in the driver's section 44 of the upper slewing body 4, is supported from below by a seat support base 43S. That is, the hydraulic excavator 1 is equipped with a seat support base 43S that supports the driver's seat 44a. The seat support base 43S is constructed by connecting multiple metal plates in a stepped manner from the front lower part to the rear upper part of the driver's seat 44a (see Figure 7).

[0027] The driver's unit 44 is provided with the following control members 44b: a right operating lever 44b1, a left operating lever 44b2, a function limiting lever 44b3, a pair of travel levers 44b4, and a number of pedals 44b5.

[0028] The right operating lever 44b1 is supported by the right control box 45R, which is located to the right 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, which is located to the left of the driver's seat 44a. The function limiting lever 44b3 is a lever for switching 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 several pedals 44b5 are located in front of the driver's seat 44a.

[0029] On the floor 44F of the driver's compartment 44, an air conditioning unit 50 is positioned to the right and in front of the driver's seat 44a. Inside the air conditioning unit 50 are the necessary equipment for air conditioning (temperature control of the air), such as an evaporator, blower, and heater core. On the seat support base 43S, an outdoor unit 54 is positioned behind the driver's seat 44a. The outdoor unit 54 includes a compressor for compressing the refrigerant and a condenser for heat exchange. By circulating the refrigerant between the air conditioning unit 50 and the outdoor unit 54, and by performing heat exchange in the evaporator of the air conditioning unit 50 and the condenser of the outdoor unit 54, the air inside the cabin 100 (indoor air) or the air taken in from outside by the air conditioning unit 50 (outdoor air) is cooled. Then, by driving the blower, cold air is blown into the cabin 100 from the outlet of the air conditioning unit 50. Meanwhile, the coolant heated to a high temperature by the engine EG is circulated through the heater core, and by blowing air onto the heater core, warm air is blown out from the outlet into the cabin 100.

[0030] A monitor 60 is positioned above the air conditioning unit 50. The monitor 60 is a display device that shows various information. For example, the monitor 60 displays various settings for the hydraulic excavator 1, fuel level, hour meter, and, if a surveillance camera is installed, images taken by the surveillance camera. The monitor 60 is supported, for example, by a beam (not shown) that extends to the left from the right side wall of the cabin 100.

[0031] Below the floor 44F of the operating unit 44, a control valve CV is located. The control valve CV is an assembly of directional control valves corresponding to each hydraulic actuator. The directional control valves control the flow direction and flow rate of the hydraulic fluid supplied to the corresponding hydraulic actuator. In this embodiment, an electromagnetic control method is employed for the control valve CV (each directional control valve). That is, by outputting a control signal from the controller 70 (see Figure 4, etc.), described later, to the electromagnetic proportional valve of the control valve CV, the flow direction and flow rate of the hydraulic fluid supplied from the hydraulic pump P (see Figure 4, etc.) to the hydraulic actuator are controlled.

[0032] On the seat support base 43S, a communication unit 43a is positioned to the right of the outdoor unit 54. The communication unit 43a includes an antenna and a positioning unit and is provided for communication with the outside and for measuring the vehicle's position. Further to the right of the communication unit 43a on the seat support base 43S, a lamp 43b is provided. The lamp 43b lights up when the hydraulic excavator 1 is in operation or to warn the surroundings, drawing attention to the surroundings. Further to the right of the lamp 43b on the seat support base 43S, an opening / closing cover 43c is connected so as to open forward and rotate vertically. By rotating the opening / closing cover 43c upward and opening it, it becomes possible to access, for example, the internal fuel tank and refuel the fuel tank.

[0033] As shown in Figure 3, 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 member that forms the right-side wall of the machine room 43. The right-side cover 43R is provided with an opening 43Rp. The opening 43Rp is provided to allow air to circulate between the inside and outside of the machine room 43. By directing the above air to the heat exchanger HE (see Figures 4 and 5), which will be described later, the cooling water passing through the heat exchanger HE can be cooled, thereby cooling the engine EG. As a safety measure, for example, a mesh-like guard is provided at the opening 43Rp, but the shape of the guard is not limited to a mesh shape.

[0034] The rear cover 43B is a cover member that forms the rear wall of the machine room 43. A counterweight 43W is attached below the rear cover 43B to balance the weight with the work machine 3. The left side cover 43L is a cover member that forms the left side wall of the machine room 43. The lower left cover 43LU is a cover member that forms the side wall below the left side cover 43L. The right side cover 43R, the left side cover 43L, and the lower left cover 43LU are detachably attached to the machine room 43 by bolts or the like. The rear cover 43B is rotatably attached to the rear of the machine room 43, for example, by opening to the right, but it may also be detachably attached by bolts or the like.

[0035] [3. Internal configuration of the machine room] Figure 4 is a schematic plan view showing the internal configuration of the machine room 43 when the hydraulic excavator 1 is cut in a horizontal plane including line AA in Figure 1. Line AA passes through engine EG. Figure 5 is a schematic rear view showing the internal configuration of the machine room 43 with the side walls of the machine room 43 omitted from the illustration. In Figure 5, for convenience, the outer shape of the left side cover 43L is shown by a dashed line.

[0036] As shown in Figures 4 and 5, a hydraulic pump P is located to the left of the engine EG within the machine room 43. On the other hand, a heat exchanger HE is located to the right of the engine EG within the machine room 43. The heat exchanger HE includes a radiator and an oil cooler.

[0037] 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. By cooling the refrigerant through heat exchange in the radiator and supplying the refrigerant from the radiator to the engine EG (water jacket), the engine EG can be cooled. The refrigerant is, for example, coolant.

[0038] The oil cooler is a second heat exchanger connected to the oil passages that circulate via the aforementioned hydraulic pump P and hydraulic actuators. The oil cooler cools the hydraulic fluid flowing through the oil passages by heat exchange when driven by the hydraulic pump P. The oil cooler is arranged side by side with the radiator, for example, in the front-to-back direction. The oil cooler may also be arranged so that at least a portion of it overlaps with the radiator.

[0039] A fan F (see Figure 4) is positioned between the engine EG and the heat exchanger HE. The rotational power of the engine EG's crankshaft is transmitted to the fan F via a fan belt and fan pulley, thereby driving the fan F to rotate.

[0040] When fan F is driven, it blows air toward the heat exchanger HE. More specifically, when fan F is driven, air is drawn into the machine room 43 from, for example, a vent (not shown) provided in the slewing frame 41 (see Figure 1), and the drawn air flows toward the heat exchanger HE. This cools the heat exchanger HE. In other words, the refrigerant (cooling water) flowing through the radiator of the heat exchanger HE is cooled, and the hydraulic oil flowing through the oil cooler is also cooled.

[0041] The air that cools the heat exchanger HE flows through the gaps in the heat exchanger HE or along the surface of the heat exchanger HE towards the opening 43Rp (see Figure 3), and is discharged from the opening 43Rp to the outside of the machine room 43. This method of cooling the heat exchanger HE with a flow of cooling air is called the "discharge type". Alternatively, the heat exchanger HE may be cooled by driving a fan F to draw air into the machine room 43 from the opening 43Rp and directing the drawn-in air onto the heat exchanger HE. This method of cooling the heat exchanger HE with a flow of cooling air is called the "suction type".

[0042] The fan F described above is surrounded by a housing CA. Housing CA is a fan shroud with openings on the heat exchanger HE side and the engine EG side. The cooling air generated by the operation of fan F passes through the inside of housing CA and flows, for example, from the engine EG side towards the heat exchanger HE side.

[0043] Based on the above, the hydraulic excavator 1 of this embodiment can be described as follows, with the left side of the engine EG, which is the prime mover, being referred to as "one side" and the right side as "the other side". That is, the hydraulic excavator 1 comprises a hydraulic pump P located on one side of the prime mover within the machine room 43, and a heat exchanger HE located on the other side of the prime mover within the machine room 43.

[0044] Within the machine room 43, a bracket BR is positioned to the left of the engine EG. This positions the bracket BR opposite the left-side cover 43L within the machine room 43. The bracket BR is, for example, made of a metal plate and is supported by the left support frame 81 (see Figures 6-9) within the machine room 43. Details regarding the support method for the bracket BR will be described later.

[0045] The bracket BR is fitted with the first controller 70a. The first controller 70a is a type of controller 70. The first controller 70a is an electronic control controller and consists of an electronic control unit, also known as an ECU (Electronic Control Unit). For example, the first controller 70a electronically controls the hydraulic pump P and the control valve CV (see Figure 4).

[0046] The first controller 70a is mounted on the first surface BR1, which is one side of the bracket BR. The first surface BR1 is one side surface of the bracket BR, that is, the side facing the left side cover 43L (the side opposite to the side facing the hydraulic pump P). In this way, the hydraulic excavator 1 is positioned inside the machine room 43 so as to face the removable cover member (left side cover 43L) that forms the side wall of the machine room 43, and includes a bracket BR to which the controller 70 (particularly the first controller 70a) is mounted.

[0047] A second controller 70b is located within the machine room 43. The second controller 70b is also a type of controller 70, similar to the first controller 70a, and is composed of, for example, an ECU. The second controller 70b controls the electrical components located inside the hydraulic excavator 1 (for example, the monitor 60 in Figure 2) and is an integrated controller that works in conjunction with the first controller 70a to control the hydraulic pump P and the like.

[0048] The second controller 70b is mounted on the mounting bracket ST. The mounting bracket ST is fixed to the front wall 43S1 extending upward from the front lower part of the driver's seat 44a in the seat support base 43S. As a result, the second controller 70b is positioned on one side of the hydraulic pump P and in front of the bracket BR.

[0049] A third controller 70c is further arranged within the machine room 43. The third controller 70c is also a type of controller 70, similar to the first controller 70a and the second controller 70b, and is composed of, for example, an ECU. The third controller 70c is mounted on the second surface BR2, which is the other surface of the bracket BR. The second surface BR2 is the surface of the bracket BR opposite to the first surface BR1, that is, the surface facing the hydraulic pump P.

[0050] The third controller 70c is a controller for machine guidance or machine control. The third controller 70c is an optional controller; that is, it is installed as needed.

[0051] For example, if a sensor for detecting posture is attached to a predetermined position on the work machine 3 (e.g., the arm 32), the third controller 70c can display guidance on the monitor 60 (see Figure 2) based on the detection results of the sensor. This allows the operator to operate the control member 44b so that the bucket 33 is in the desired position, based on the guidance displayed on the monitor 60. In this case, machine guidance that guides the operation of the work machine 3 is realized. Furthermore, if the sensor detects the position information of the cutting edge of the bucket 33, the third controller 70c can also realize machine control based on the position information. In machine control, the work machine 3 is automatically operated by the third controller 70c so that the cutting edge of the bucket 33 is in the desired position based on the position information.

[0052] In this embodiment, as shown in Figure 5, the bracket BR is positioned such that, in a rear view of the hydraulic excavator 1, a portion of it is to the left of the hydraulic pump P and above the hydraulic pump P. Alternatively, the entire bracket BR may be positioned to the left of the hydraulic pump P and above the hydraulic pump P in a rear view of the hydraulic excavator 1. In other words, the bracket BR only needs to be positioned such that, in a rear view, at least a portion of it is to one side of the hydraulic pump P and above the hydraulic pump P.

[0053] Within the machine room 43, the side on which the hydraulic pump P is located relative to the engine EG can more easily secure a larger open space relative to the engine EG than the other side on which the heat exchanger HE is located relative to the engine EG. This is because the heat exchanger HE, fan F, and housing CA, which occupy a large amount of space within the machine room 43, are located on the other side relative to the engine EG.

[0054] Within the machine room 43, at least a portion of the bracket BR is positioned to one side of the hydraulic pump P when viewed from the rear. This allows the bracket BR to be positioned in a large open space to one side of the hydraulic pump P within the machine room 43. Furthermore, because at least a portion of the bracket BR is positioned above the hydraulic pump P, as shown in Figure 5, space for routing the harness HN connecting the controller 70 (e.g., the first controller 70a) attached to the bracket BR and the hydraulic pump P can be easily secured below the bracket BR on one side of the hydraulic pump P. This facilitates the routing of the harness HN.

[0055] Furthermore, the above arrangement of bracket BR allows the first controller 70a to be positioned close to the hydraulic pump P. This enables the first controller 70a and the hydraulic pump P to be connected with a short harness HN. Therefore, there is no need to route the harness HN around the heat exchanger HE or engine EG, which also simplifies the routing of the harness HN.

[0056] Furthermore, the bracket BR is positioned opposite the left-side cover 43L, which is a cover member forming the side wall of the machine room 43. This allows workers (maintenance personnel) to easily access and perform maintenance on the first controller 70a by removing the left-side cover 43L. It is also possible to remove the first controller 70a together with the bracket BR for maintenance. In any case, the positioning of the bracket BR opposite the left-side cover 43L makes maintenance work on the first controller 70a easier.

[0057] As shown in Figure 4, the first controller 70a is positioned to the left of the hydraulic pump P in a plan view; in other words, the controller 70 (particularly the first controller 70a) is positioned to one side of the hydraulic pump P in a plan view.

[0058] In this case, the first controller 70a can be positioned by effectively utilizing the space on one side of the hydraulic pump P. Furthermore, as shown in Figure 4, it is also possible to consolidate the other controllers 70 (second controller 70b, third controller 70c) in addition to the first controller 70a on the same side of the hydraulic pump P. As a result, the design and routing of the harnesses connected to each controller 70 becomes easier.

[0059] In order to make it easier to secure space for other controllers 70 (second controller 70b, third controller 70c) to be placed on one side of the hydraulic pump P and in front of the bracket BR within the machine room 43, it is desirable that the bracket BR be positioned at an angle with respect to the front-rear direction. More specifically, as shown in Figure 4, it is desirable that the bracket BR be positioned so that, in a plan view, it moves away from the hydraulic pump P from the rear to the front.

[0060] From the viewpoint of facilitating the routing of the harnesses connected to the first controller 70a and the second controller 70b, it is desirable to concentrate (group together) 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 realizing such a concentrated arrangement, it is desirable that the second controller 70b be positioned above the hydraulic pump P and in front of the bracket BR, as shown in Figures 4 and 5. In particular, as shown in Figure 4, it is desirable that the second controller 70b be positioned on one side of the hydraulic pump P in a plan view.

[0061] In order to support the first controller 70a and the third controller 70c with a small number of parts, it is desirable to support both the first controller 70a and the third controller 70c simultaneously with a single bracket BR. In this regard, as in this embodiment, it is desirable 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.

[0062] [4. Regarding the support method of the bracket] Next, the method of supporting the bracket BR described above inside the machine room 43 will be explained. Figure 6 is a perspective view of the seat support base 43S and support structure 80 from a diagonal rearward angle. Figure 7 is an exploded perspective view of the seat support base 43S and support structure 80 shown in Figure 6. The support structure 80 is a structure that supports the seat support base 43S from below on the slewing frame 41. The bracket BR described above is supported by the support structure 80. The details of the support structure 80 will be explained below.

[0063] (4-1. Structure of the support structure) Figure 8 is a perspective view of the support structure 80 from the rear at an angle. Figure 9 is a perspective view of the support structure 80 from the front at an angle. The support structure 80 is composed of a left support frame 81, a right support frame 82, and an upper frame 83.

[0064] The left support frame 81 is positioned one side to the left of the center in the left-right direction within the machine room 43 (see Figure 4, etc.). The left support frame 81 has a first upright section 811, a second upright section 812, and a connecting section 813.

[0065] The first erected portion 811 is erected inside the machine room 43. More specifically, the first erected portion 811 is erected on the left front support portion 91 on the slewing frame 41. The left front support portion 91 is erected on one side (left side) of the slewing frame 41 and in the center in the front-rear direction. The left front support portion 91 is fastened to the slewing frame 41, for example, with bolts, but may also be fixed by welding. In addition to the first erected portion 811, the left front support portion 91 supports the front wall 43S1 of the seat support base 43S. Therefore, the left front support portion 91 constitutes a support base support portion that supports the seat support base 43S.

[0066] The second upright section 812 is erected inside the machine room 43, behind the first upright section 811. More specifically, the second upright section 812 is erected at the intersection of the left vertical plate 92 and the horizontal plate 93 on the slewing frame 41. The second upright section 812 is fastened to the intersection, for example, with bolts, but may also be fixed by welding. The horizontal plate 93 is erected at the rear of the slewing frame 41 and extends in the left-right direction. The left vertical plate 92 is erected to the right of the first upright section 811 on the slewing frame 41 and extends forward from the left end of the horizontal plate 93. The left vertical plate 92 and the horizontal plate 93 are provided to increase the rigidity of the slewing frame 41 against the weight of the work machine 3. The left vertical plate 92 and the horizontal plate 93 are attached to the slewing frame 41, for example, by welding. The second upright section 812 extends upward above the first upright section 811.

[0067] The connecting portion 813 connects the first upright portion 811 and the second upright portion 812. More specifically, the connecting portion 813 is connected to the first upper end portion 811a (see Figure 9), which is the upper end of the first upright portion 811, and to the intermediate portion 812H in the vertical direction of the second upright portion 812. The intermediate portion 812H is located between the second upper end portion 812a, which is the upper end of the second upright portion 812, and the second lower end portion 812b, which is the lower end of the second upright portion 812. The position of the intermediate portion 812H in the vertical direction is not particularly limited. For example, the intermediate portion 812H may be located midway 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.

[0068] In this embodiment, the connecting portion 813 is integrally formed with the first erecting portion 811, but it may also be formed as a separate component from the first erecting portion 811 and connected to the first erecting portion 811. Furthermore, the connecting portion 813 is bolted to the second erecting portion 812 at the intermediate portion 812H, but it may also be integrally formed with the second erecting portion 812. The connecting portion 813 spans the first erecting portion 811 and the second erecting portion 812 in the front-rear direction (more precisely, diagonally to the front-rear direction in a plan view).

[0069] The right support frame 82 is positioned in the machine room 43 to the right, rather than to the center in the left-right direction. The right support frame 82 has a first frame 821, a second frame 822, and a third frame 823.

[0070] The second frame 822 is erected at the intersection of the horizontal plate 93 and the right vertical plate 94 on the slewing frame 41. The right vertical plate 94 is erected on the slewing frame 41 and extends forward from the right end of the horizontal plate 93. The right vertical plate 94, like the left vertical plate 92 and the horizontal plate 93, is provided to increase the rigidity of the slewing frame 41 against the weight of the work machine 3. The right vertical plate 94 is attached to the slewing frame 41, for example, by welding.

[0071] The first frame 821 is positioned in front of the second frame 822 inside the machine room 43. The first frame 821 is fixed to the side of the right vertical plate 94 with bolts or the like. The third frame 823 is connected to the upper end of the first frame 821 and extends rearward, and is 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 may also be formed as a separate component from the first frame 821 and connected to the first frame 821. Also, the third frame 823 is connected to the second frame 822 via a connecting stay 824, but it may also be integrally formed with the second frame 822. The third frame 823 spans the first frame 821 and the second frame 822 in the front-rear direction.

[0072] The upper frame 83 is connected to the upper end of the left support frame 81 (the second upper end portion 812a of the second erecting portion 812) and the upper end of the right support frame 82 (the connecting stay 824) by welding or the like. The upper frame 83 extends in the left-right direction. As shown in Figure 7, the upper frame 83 is fastened to the lower surface of the seat support base 43S by bolts or the like. In this way, the seat support base 43S is supported by the support structure 80.

[0073] (4-2. Bracket support method) As shown in Figures 6 to 9, the bracket BR described above is fixed to the first upright portion 811 and the connecting portion 813 of the left support frame 81. The bracket BR is fixed to the first upright portion 811 and the connecting portion 813, for example, by bolt fastening. Note that the bracket BR may be fixed by methods other than bolt fastening. By fixing the bracket BR to the members supporting the seat support base 43S (first upright portion 811 and connecting portion 813) in this way, the bracket BR is stably supported inside the machine room 43.

[0074] In particular, in this embodiment, as shown in Figure 8, the front edge portion BR-f of the bracket BR is fixed to the first upright portion 811. The upper edge portion BR-u of the bracket BR is fixed to the connecting portion 813. With this method of fixing the bracket BR, since the bracket BR extends downward relative to the connecting portion 813, the empty space below the connecting portion 813 is effectively utilized as space for arranging the bracket BR and the controller 70. Moreover, since the front edge portion BR-f of the bracket BR is fixed to the first upright portion 811, the support of the bracket BR is stable even when the bracket BR is suspended and supported relative to the connecting portion 813 as shown in Figure 8, etc.

[0075] From the viewpoint of ensuring that the controller 70 is properly positioned in the empty space below the connecting portion 813, it is desirable that the controller 70 be positioned as follows. That is, as shown in Figure 8, it is desirable that the controller 70 (for example, the first controller 70a) be positioned below the upper edge portion BR-u of the bracket BR.

[0076] Furthermore, from the viewpoint of effectively utilizing the empty space between the first erected section 811 and the second erected section 812, it is desirable that the controller 70 be arranged as follows: That is, it is desirable that the controller 70 (for example, the first controller 70a) be placed between the first erected section 811 and the second erected section 812.

[0077] In particular, as shown in Figures 8 and 9, it is desirable that the bracket BR be fixed to the first upright portion 811 and the connecting portion 813 so as to be spaced (forward) from the second upright portion 812. This is for the following reasons: In a configuration where the bracket BR is spaced apart from the second upright portion 812, a gap GP is formed between the bracket BR and the second upright portion 812. Therefore, by removing the left side cover 43L (see Figure 5, etc.), it becomes possible to access the second side BR2 of the bracket BR from the first side BR1 through the gap GP. Consequently, even if another controller 70 (third controller 70c in this embodiment) is mounted on the second side BR2 of the bracket BR, maintenance on the other controller 70 becomes easier.

[0078] 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 upright portion 811 and the middle portion 812H of the second upright portion 812. By fixing the bracket BR to the left support frame 81 with this configuration, the arrangement of the bracket BR using the support structure 80 having the left support frame 81 is realized within the machine room 43.

[0079] In particular, the left support frame 81 of the support structure 80 that supports the seat support base 43S includes a first upright portion 811, a second upright portion 812, and a connecting portion 813, as described above. With this configuration of the left support frame 81, it is possible to fix the bracket BR to the first upright portion 811 and the connecting portion 813, as described above. Therefore, the above-described configuration of the left support frame 81 is effective in that it ensures that the left support frame 81 can be effectively utilized not only as a frame that supports the seat support base 43S, but also as a frame that supports the bracket BR.

[0080] [5. Supplement] In this embodiment, a configuration in which the hydraulic excavator 1 is equipped with a cabin 100 has been described, but a configuration in which a canopy is provided instead of a cabin 100 is also possible.

[0081] The hydraulic excavator 1 may be configured to use both hydraulic equipment such as hydraulic actuators (e.g., hydraulic motors, hydraulic cylinders) and electrically driven actuators. Examples of electrically driven actuators include electric travel motors, electric cylinders, and electric slewing motors.

[0082] The hydraulic excavator 1 is configured to be equipped with an engine EG (see Figure 1) as the prime mover, but the prime mover may also be an electric motor.

[0083] In this embodiment, a hydraulic excavator 1 was used as an example of the work machine, but the work machine is not limited to a hydraulic excavator 1 and may be construction machinery such as a mobile crane. Furthermore, the work machine may be agricultural machinery such as a combine harvester or tractor.

[0084] [6. Addendum] The work machine described in this embodiment can be expressed as follows:

[0085] The work machines mentioned in Appendix (1) are: A work machine equipped with a hydraulic pump located on one side relative to the prime mover in the machine room, A heat exchanger located on the other side of the prime mover within the machine room, The machine room is further comprising a bracket on which a controller is mounted, which is positioned in the machine room so as to face a removable cover member that forms the side wall of the machine room, The bracket is positioned such that, when viewed from the rear, at least a portion of it is located to one side of the hydraulic pump and above the hydraulic pump.

[0086] The work machines in Appendix (2) are the work machines described in Appendix (1), The controller is positioned on one side of the hydraulic pump in a plan view.

[0087] The work machines in Appendix (3) are the work machines described in Appendix (1) or (2), The bracket is positioned so as to move away from the hydraulic pump from the rear towards the front in a plan view.

[0088] The work machine in Appendix (4) is the work machine described in any of Appendix (1) to (3), A first erected section is erected inside the machine room, Inside the machine room, a second erected section is erected behind the first erected section, The invention further comprises a connecting portion that connects the first erected portion and the second erected portion, The bracket is fixed to the first erection portion and the connecting portion.

[0089] The work machines in Appendix (5) are the work machines described in Appendix (4), The front edge of the bracket is fixed to the first erecting portion. The upper edge of the bracket is fixed to the connecting portion.

[0090] The work machines in Appendix (6) are the work machines described in Appendix (5), The controller is positioned below the upper edge of the bracket.

[0091] The work machine in Appendix (7) is the work machine described in any of Appendix (4) to (6), The controller is positioned between the first erected section and the second erected section.

[0092] The work machines specified in Appendix (8) are the work machines described in Appendix (7), The bracket is fixed to the first upright portion and the connecting portion so as to be spaced apart from the second upright portion.

[0093] The work machine in Appendix (9) is the work machine described in any of Appendix (4) to (8), The second erected portion extends upward from the first erected portion, The connecting portion is connected to the upper end of the first erected portion and to the middle portion in the vertical direction of the second erected portion.

[0094] The work machine in Appendix (10) is the work machine described in any of Appendix (4) to (9), A seat support base that supports the driver's seat, The system further comprises a support frame that supports the aforementioned seat support base, The support frame includes the first upright portion, the second upright portion, and the connecting portion.

[0095] The work machine in Appendix (11) is the work machine described in any of Appendix (1) to (10), When the aforementioned controller is designated as the first controller, The machine room is further equipped with a second controller located inside the machine room, The second controller is positioned above the hydraulic pump and in front of the bracket.

[0096] The work machine in Appendix (12) is the work machine described in Appendix (11), The second controller is positioned on one side of the hydraulic pump in a plan view.

[0097] The work machine in Appendix (13) is the work machine described in any of Appendix (1) to (12), When the aforementioned controller is designated as the first controller, The machine room is further equipped with 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.

[0098] Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it can be expanded or modified without departing from the spirit of the invention. [Industrial applicability]

[0099] This invention can be used, for example, in work machinery such as construction machinery and agricultural machinery. [Explanation of Symbols]

[0100] 1. Hydraulic excavator (working machine) 43 Machine room 43L Left side cover (cover component) 43S Seat support stand 44a Driver's seat 70 Controllers 70a First Controller 70b Second Controller 70c Third Controller 72 Control Valve 81 Left support frame (support frame) 811 First Construction Section 811a 1st upper end 812 Second Construction Section 812H middle part 812a 2nd upper end 812b Second lower end 813 Connection section BR Bracket BR-f front edge BR-u upper edge BR1 First surface (one side of the bracket) BR2 Second surface (the other surface of the bracket) EG Engine (prime mover) HE heat exchanger P Hydraulic pump

Claims

1. A work machine equipped with a hydraulic pump located on one side relative to the prime mover in the machine room, A heat exchanger located on the other side of the prime mover within the machine room, The machine room is further comprising a bracket on which a controller is mounted, which is positioned in the machine room so as to face a removable cover member that forms the side wall of the machine room, The bracket is positioned such that, in a rear view, at least a portion of it is located to one side of the hydraulic pump and above the hydraulic pump, in a work machine.

2. The work machine according to claim 1, wherein the controller is located on one side of the hydraulic pump in a plan view.

3. The work machine according to claim 1, wherein the bracket is arranged in a plan view so as to move away from the hydraulic pump from the rear to the front.

4. A first erected section is erected inside the machine room, Inside the machine room, a second erected section is erected rearward from the first erected section, The invention further comprises a connecting portion that connects the first upright portion and the second upright portion, The work machine according to claim 1, wherein the bracket is fixed to the first erecting portion and the connecting portion.

5. The front edge of the bracket is fixed to the first erecting portion. The upper edge of the bracket is fixed to the connecting portion, as described in claim 4.

6. The work machine according to claim 5, wherein the controller is positioned below the upper edge of the bracket.

7. The controller is positioned between the first erection section and the second erection section, as described in claim 4.

8. The work machine according to claim 7, wherein the bracket is fixed to the first upright portion and the connecting portion so as to be spaced apart from the second upright portion.

9. The second erected portion extends upward from the first erected portion, The working machine according to claim 4, wherein the connecting portion is connected to the upper end of the first erected portion and to the middle portion in the vertical direction of the second erected portion.

10. A seat support base that supports the driver's seat, The system further comprises a support frame that supports the aforementioned seat support base, The work machine according to claim 4, wherein the support frame includes the first erection portion, the second erection portion, and the connecting portion.

11. When the aforementioned controller is designated as the first controller, The machine room is further equipped with a second controller located inside the machine room, The work machine according to claim 1, wherein the second controller is positioned above the hydraulic pump and in front of the bracket.

12. The work machine according to claim 11, wherein the second controller is located on one side of the hydraulic pump in a plan view.

13. When the aforementioned controller is designated as the first controller, The machine room is further equipped with a third controller located inside the machine room. The first controller is mounted on one side of the bracket, The work machine according to any one of claims 1 to 12, wherein the third controller is mounted on the other side of the bracket.

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