Work machine

Abstract

The present application provides a work machine capable of efficiently arranging a controller and making connection work with respect to the controller easy. A hydraulic excavator as the work machine is a work machine provided with a base plate located at the bottom of a machine body and a pair of longitudinal plates arranged on the base plate so as to extend in the front-rear direction of the machine body, wherein the work machine is provided with a controller arranged between the pair of longitudinal plates.

Description

Technical Field

[0001] This invention relates to a work machine. Background Technology

[0002] Patent document 1 discloses a construction machine with a controller mounted on a rotating frame. The rotating frame includes: a base plate extending in the front-to-back direction; and a pair of longitudinal plates erected on the base plate.

[0003] Furthermore, Patent Document 2 discloses a construction machine comprising an upper rotating body and working accessories. The upper rotating body includes: an upper frame serving as a base; and actuator working equipment for operating a hydraulic actuator. A pair of left and right longitudinal plates are provided on the upper frame, extending approximately the entire length in the front-to-back direction.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-148145

[0007] Patent Document 2: Japanese Patent Application Publication No. 2013-64254 Summary of the Invention

[0008] However, in recent years, technologies have emerged that automatically control construction machinery and other work equipment based on construction data from the work site, or provide operators of such machinery with the aforementioned construction data and various information about the machinery. When applying this technology to work equipment, especially small machines, the space on the base plate is limited; therefore, it is desirable to efficiently configure the controller to implement the aforementioned technology. However, even if such a configuration is achieved, for example, if the operation of the controller from outside the work equipment is obstructed by a pair of longitudinal plates, the connection operation to the controller may become difficult.

[0009] Furthermore, if the previously proposed technology is applied to work machinery, it is sometimes necessary to add control valves for controlling hydraulic equipment, such as actuator working devices, to the machine body consisting of an upper rotating body and working accessories. However, especially for small work machinery, the space on the upper frame, which serves as the base plate, is limited, so the installation of the aforementioned control valves may become difficult.

[0010] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a work machine that can efficiently configure the controller and facilitate connection operations with respect to the controller.

[0011] Another object of the present invention is to provide a working machine that can easily configure control valves.

[0012] One aspect of the present invention relates to a working machine comprising: a base plate located at the bottom of a machine body; and a pair of longitudinal plates extending along the front-rear direction of the machine body on the base plate, wherein the working machine comprises a controller disposed between the pair of longitudinal plates.

[0013] Another aspect of the invention relates to a working machine comprising: a base plate located at the bottom of a machine body; a pair of longitudinal plates extending along the front-rear direction of the machine body on the base plate; a hydraulic device for controlling the movement of the machine body; and a control valve for controlling the hydraulic device, wherein the control valve is disposed between the pair of longitudinal plates.

[0014] Invention Effects

[0015] Based on the above structure, the controller can be configured efficiently, and the connection operation relative to the controller is made easy.

[0016] Furthermore, based on the above structure, control valves can be easily configured. Attached Figure Description

[0017] Figure 1 This is a left view showing the outline structure of a hydraulic excavator, an example of a working machine according to an embodiment of the present invention.

[0018] Figure 2 This is a right view showing the outline structure of the hydraulic excavator described above.

[0019] Figure 3A This is a block diagram schematically illustrating the structure of the hydraulic system of the aforementioned hydraulic excavator.

[0020] Figure 3B This is a block diagram schematically illustrating the structure of the hydraulic system of the aforementioned hydraulic excavator.

[0021] Figure 4A This is a perspective view showing the structure of the slewing frame of the aforementioned hydraulic excavator, viewed from the right rear.

[0022] Figure 4B This is a perspective view showing the structure of the slewing frame of the aforementioned hydraulic excavator, viewed from the right rear.

[0023] Figure 5A This is a top view showing the structure of the aforementioned rotating frame.

[0024] Figure 5B This is a top view showing the structure of the aforementioned rotating frame.

[0025] Figure 6A This is a top view showing the configuration structure of the controller and the like arranged on the aforementioned slewing frame.

[0026] Figure 6B This is a top view showing the configuration structure of the control valves and the like arranged on the aforementioned rotary frame.

[0027] Figure 7A This is a perspective view showing the configuration structure of the aforementioned controllers, etc., as viewed from the left rear.

[0028] Figure 7B This is a perspective view showing the configuration structure of the aforementioned control valves, etc., as viewed from the left rear.

[0029] Figure 8A This is a perspective view showing the configuration structure of the aforementioned controllers, etc., as viewed from the left front.

[0030] Figure 8B This is a perspective view showing the configuration structure of the aforementioned control valves, etc., as viewed from the left front.

[0031] Figure 9 This is a top view showing the routing of the piping extending from the aforementioned control valve.

[0032] Explanation of reference numerals in the attached figures

[0033] 1: Hydraulic excavator (operating machinery), 2: Support body, 5: Body, 5D: Bottom, 43: Swing motor, 44: Control unit, 61: Hydraulic pump, 64: Hydraulic actuator, 65: Rotary joint, 421: Base plate, 421C: Central section, 422: Pair of longitudinal plates, 422a: One longitudinal plate, 422b: Another longitudinal plate, 451a: Engine cover assembly, 454: Engine (drive source), CP1: Connecting plate, CP2: Other connecting plates, CU1: Controller, CU2: Other controllers, CV1: Control valve, CV2: Other control valves, EE1: Electrical assembly equipment, EE2: Other electrical assembly equipment, HE: Hydraulic equipment, HP1: First oil circuit, HP2: Second oil circuit, PP: Piping, TK: Container. Detailed Implementation

[0034] The embodiments of the present invention will be described below based on the accompanying drawings.

[0035] [1. Overview of the structure of the operating machinery]

[0036] Figure 1 and Figure 2 These are left and right views showing the outline structure of a hydraulic excavator 1, an example of an operating machine according to an embodiment of the present invention. Figure 1 For convenience, the illustration of fuel tank 453, which will be described later, has been omitted. Figure 2For convenience, the illustrations of the driver's seat 441, etc., described later, are omitted. The hydraulic excavator 1 includes a support body 2, a working machine 3, and a slewing body 4. In this embodiment, the working machine 3 and the slewing body 4 are collectively referred to as the machine body 5.

[0037] Here, the directions in this embodiment are defined as follows. The direction facing the operator (driver, operator) seated in the control unit 44 of the rotary body 4 is defined as "forward," and the opposite direction is defined as "rear." When the rotary body 4 is not rotated relative to the support body 2 (rotation angle is 0 degrees), the forward / backward direction of the rotary body 4 is the same as the forward / backward direction of the support body 2. The accompanying drawings show the hydraulic excavator 1 in the state where the rotary body 4 is not rotated relative to the support body 2. Furthermore, from the operator's perspective in the driver's seat 441, the left side is defined as "left," and the right side as "right." The direction of gravity, perpendicular to 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, "F" represents forward, "B" represents rear, "L" represents left, "R" represents right, "U" represents up, and "D" represents down, as needed.

[0038] The support body 2 (also called the lower traveling body) has a pair of left and right tracks 21, a pair of left and right travel motors 22, and a scraper 23. The left and right travel motors 22 drive the left and right tracks 21 respectively, enabling the hydraulic excavator 1 to move forward and backward. The travel motors 22 are hydraulic motors. The scraper 23 is located on the front side of the support body 2 and is used for ground leveling, soil removal, etc. The scraper 23 is rotated by a scraper cylinder (not shown) composed of a hydraulic cylinder. The base end of the scraper cylinder is connected to the scraper 23.

[0039] The work machine 3 is equipped with a boom 31, a boom 32, and a bucket 33. The boom 31, boom 32, and bucket 33 can be driven independently to perform excavation operations such as sand and soil excavation.

[0040] The base end of the boom 31 is rotatably supported on a swing bracket 41 located at the front of the rotating body 4, and rotates in the vertical and horizontal directions and the front-back directions by means of the boom cylinder 311. The base end of the boom cylinder 311 is supported on the swing bracket 41, and the boom cylinder 311 can move freely in the telescoping direction.

[0041] The base end of the boom 32 is rotatably supported on the front end of the boom 31 and rotated by the boom cylinder 321. The base end of the boom cylinder 321 is supported on the boom 31 and the boom cylinder 321 can move freely in and out.

[0042] The base of the bucket 33 is rotatably supported on the front end of the boom 32 and rotates using the bucket cylinder 331. The base of the bucket cylinder 331 is supported on the boom 32 and can move freely in and out of the boom. The boom cylinder 311, boom cylinder 321, and bucket cylinder 331 are each composed of a hydraulic cylinder.

[0043] The slewing body 4 (also called the upper slewing body) is located above the support body 2 and is configured to rotate relative to the support body 2 via the slewing bearing SB. That is, the support body 2 supports the machine body 5 (especially the slewing body 4) so ​​that it can rotate. In addition to the swing bracket 41, the slewing body 4 also includes a slewing frame 42, a slewing motor 43, a control unit 44, an internal combustion engine compartment 45, and a counterweight 46. That is, the hydraulic excavator 1 includes a swing bracket 41, a slewing frame 42, a slewing motor 43, a control unit 44, an internal combustion engine compartment 45, and a counterweight 46.

[0044] The rotating body 4 is rotated relative to the support body 2 by being driven by a rotating motor 43 configured on the rotating frame 42. The rotating motor 43 is a hydraulic motor. That is, the rotating motor 43 causes the machine body 5 (especially the rotating body 4) to rotate relative to the support body 2. The rotating frame 42 is configured at the bottom 5D of the machine body 5. The front end of the rotating frame 42 supports the swing bracket 41 so that it can rotate (swing) in the left and right directions. The swing bracket 41 is rotated in the left and right directions by a swing cylinder 411, which is a hydraulic cylinder. The base end of the swing cylinder 411 is supported on the left rear part of the rotating body 4, and the front end of the swing cylinder 411 is supported on the left side of the swing bracket 41. The swing cylinder 411 can move freely in and out. When the swing cylinder 411 extends or retracts, the swing bracket 41 rotates in the left and right directions relative to the rotating frame 42. As a result, the working machine 3 rotates in the left and right directions relative to the rotating body 4.

[0045] The rear end of the slewing frame 42 supports the counterweight 46. The counterweight 46 is a heavy object used, especially during excavation operations, to maintain the weight balance of the hydraulic excavator 1 in the forward and backward directions. Furthermore, the structure of the slewing frame 42 will be described later.

[0046] The control unit 44 (also called the driver's unit) is located on the left side of the rotary body 4. The control unit 44 is provided for an operator to sit on and operate the support body 2 and the machine body 5. More specifically, the control unit 44 is provided with a driver's seat 441 for the operator to sit on. A plurality of control components 442 are arranged around the driver's seat 441. The plurality of control components 442 are configured to include levers, switches, pedals, etc. When the operator operates the plurality of control components 442, one or more of the travel motor 22, the swing motor 43, the boom cylinder 311, the boom cylinder 321, the bucket cylinder 331, and the swing cylinder 411 are driven. As a result, the travel of the support body 2, the ground leveling operation based on the scraper 23, the digging operation based on the work machine 3, and the rotation of the rotary body 4 can be performed.

[0047] Furthermore, the driver's seat 441 and various control components 442 are covered by the cab 443. However, a structure in which the driver's seat 441 and various control components 442 are covered by a canopy instead of the cab 443 is also possible. As an example, a lamp 444, a positioning antenna assembly 445, and an indicator light 446 are installed on the upper right side of the rear of the cab 443.

[0048] The internal combustion engine compartment 45 is configured to include a right engine cover 451 and a rear engine cover 452. The right engine cover 451 forms the right side wall of the internal combustion engine compartment 45, and the rear engine cover 452 forms the rear wall of the internal combustion engine compartment 45. The right engine cover 451 and the rear engine cover 452 are respectively configured to be openable and closable in the vertical direction.

[0049] The right engine hood 451 has a plurality of engine hood components 451a. More specifically, the plurality of engine hood components 451a includes a first engine hood component 451a1, a second engine hood component 451a2, and a third engine hood component 451a3. The first engine hood component 451a1 is disposed on the right side of the rotating body 4. The first engine hood component 451a1 is constructed by bending a metal (or resin) plate-like component extending in the front-rear direction towards the left. That is, the first engine hood component 451a1 is bent in a manner that bulges out to the right front. The first engine hood component 451a1 is housed in the internal combustion engine compartment 45 and covers the right side of the fuel tank 453 for fuel storage. The fuel tank 453 is an example of a container TK. That is, the hydraulic excavator 1 includes: a container TK (in this embodiment, a fuel tank 453); and an engine hood component 451a (in this embodiment, the first engine hood component 451a1) that covers the right side of the container TK in the left-right direction.

[0050] From the viewpoint of protecting the container TK from sand or other debris flying in from the right side relative to the left and right directions, the following structure is preferred. That is, as in this embodiment, the hydraulic excavator 1 preferably includes an engine cover component 451a (in this embodiment, a first engine cover component 451a1) that covers the right side of the container TK in the left and right directions.

[0051] The second engine hood component 451a2 is positioned behind the first engine hood component 451a1. Therefore, the second engine hood component 451a2 is positioned on the right side of the rotating body 4, just like the first engine hood component 451a1. The second engine hood component 451a2 is constructed by bending a metal (or resin) plate-like component extending in the front-rear direction towards the left as it moves rearward. That is, the second engine hood component 451a2 is bent in a manner that bulges out to the right and rear. An air intake 45a extending in the left-right direction is provided on the second engine hood component 451a2.

[0052] The third engine hood component 451a3 is disposed to the upper left of the first engine hood component 451a1 and the second engine hood component 451a2. The third engine hood component 451a3 is constructed by bending a metal (or resin) plate-shaped component extending in the front-rear direction downward as it tends forward. That is, the third engine hood component 451a3 is bent in a forward and upward bulging manner.

[0053] In addition to the fuel tank 453, the internal combustion engine compartment 45 also houses the engine 454 and multiple hydraulic pumps 61. The engine 454 is the drive source for the hydraulic excavator 1. That is, the hydraulic excavator 1 has the engine 454 as the drive source and multiple hydraulic pumps 61.

[0054] Engine 454 is a diesel engine, but is not limited to it; for example, it may also be a gasoline engine. Since engine 454 is a diesel engine, light oil, which serves as the aforementioned fuel, is stored in the fuel tank 453 of this embodiment. However, the fuel is not limited to light oil; for example, if engine 454 is a gasoline engine, gasoline may also be used. Furthermore, the drive source for the hydraulic excavator 1 is not limited to engine 454; for example, it may be an electric motor driven by electricity. Hereinafter, the hydraulic system of the hydraulic excavator 1, which includes multiple hydraulic pumps 61, will be described.

[0055] [2. Structure of the hydraulic system of the operating machinery]

[0056] Figure 3AThis is a block diagram schematically illustrating the structure of the hydraulic system of a hydraulic excavator 1. Multiple hydraulic pumps 61 include a main pump 611 and a pilot pump 612. The main pump 611 is a variable-capacity pump, but is not limited to this; for example, it could also be a fixed-capacity pump. The main pump 611 is connected to the rotating shaft (output shaft) of the engine 454. The rotation of the rotating shaft of the engine 454 drives the main pump 611.

[0057] The pilot pump 612 is a fixed-capacity pump, but is not limited to this; it can also be a variable-capacity pump. Similar to the main pump 611, the pilot pump 612 is connected to the rotating shaft of the engine 454. Therefore, the pilot pump 612 is driven by the rotation of the engine 454's rotating shaft. That is, multiple hydraulic pumps 61 are driven by a drive source (engine 454 in this embodiment). The main pump 611 and the pilot pump 612 are each connected to a working oil tank 62 for storing working oil.

[0058] also, Figure 3A The diagram shows one main pump 611 and one pilot pump 612 as an example, but there can be more than two main pumps 611 and pilot pumps 612. Furthermore, the number of main pumps 611 and the number of pilot pumps 612 can be different. For example, there can be two main pumps 611 and one pilot pump 612.

[0059] The main pump 611 and pilot pump 612 are respectively connected to the working oil tank 62 for storing working oil. In addition, the working oil tank 62 can be connected to the fuel tank 453 (see reference). Figure 2 Together with or replacing fuel tank 453, it constitutes container TK (see reference). Figure 2 That is, container TK can be any single or multiple containers used to store stored items (such as fuel, working oil, etc.).

[0060] If the main pump 611 is driven by the engine 454, the working oil in the working oil tank 62 is supplied to the hydraulic actuator 64 via the first control valve 63 disposed inside the rotating body 4. The location of the first control valve 63 will be described later. In this embodiment, the hydraulic actuator 64 means a collection of hydraulic motors (e.g., travel motor 22, swing motor 43) and hydraulic cylinders (e.g., boom cylinder 311, swing cylinder 411) driven by the working oil. Therefore, the hydraulic actuator 64 is configured to include both a hydraulic motor and a hydraulic cylinder. That is, the hydraulic excavator 1 has a hydraulic actuator 64 that is driven by the working oil discharged from the hydraulic pump 61 (the main pump 611 in this embodiment).

[0061] Furthermore, as described above, in the hydraulic actuator 64, in addition to the travel motor 22, a first control valve 63 is also provided, and it is disposed on the machine body 5 which rotates relative to the support body 2. The travel motor 22 is disposed on the support body 2. Therefore, the travel motor 22 is connected to the first control valve 63 via a rotary joint 65. Using the rotary joint 65, the flow of working oil between the first oil passage HP1 provided in the machine body 5 and the second oil passage HP2 provided in the support body 2 can be realized. Therefore, the hydraulic excavator 1 has a rotary joint 65 that connects the first oil passage HP1 of the machine body 5 and the second oil passage HP2 of the support body 2. In addition, using the rotary joint 65, the hydraulic hoses and the like constituting the first oil passage HP1 and the second oil passage HP2 can be prevented from tangling when the machine body 5 rotates relative to the support body 2.

[0062] The first control valve 63 is a directional switching valve that controls the flow direction and flow rate of the working oil supplied from the main pump 611 to the hydraulic actuator 64. The control of the first control valve 63 is based on the working oil (also called pilot oil) supplied from the pilot pump 612 to the first control valve 63. The supply of pilot oil from the pilot pump 612 to the first control valve 63 is performed via either the remote control valve 66 or the second control valve 67. Therefore, the remote control valve 66 and the second control valve 67 respectively control the first control valve 63.

[0063] The remote control valve 66 (also known as the pilot valve) is provided in correspondence with each device constituting the hydraulic actuator 64 (such as the travel motor 22, the boom cylinder 311, etc.). That is, there are multiple remote control valves 66.

[0064] Each remote control valve 66 is connected to the operating component 442. When the operator operates the operating component 442 (e.g., a control lever), the remote control valve 66 is operated to supply pilot oil to the first control valve 63. Based on this pilot oil, the first control valve 63 controls, for example, the flow direction and flow rate of the working oil supplied to the swing motor 43. As a result, the machine body 5 (particularly the swing body 4) rotates relative to the support body 2. As another example, the first control valve 63 controls the flow direction and flow rate of the working oil supplied to the boom cylinder 311, thereby driving the boom 31. Therefore, the first control valve 63 controls the movement of the machine body 5. According to this structure, the hydraulic excavator 1 of this embodiment is configured to be manually operable.

[0065] The second control valve 67 is configured to integrally include multiple electromagnetic proportional valves corresponding to each device constituting the hydraulic actuator 64 (e.g., travel motor 22, boom cylinder 311, etc.). At least some of the aforementioned multiple electromagnetic proportional valves may be simply electromagnetic valves. Therefore, the number of second control valves 67 differs from that of the remote control valve 66, being only one. However, the second control valve 67 is not limited to the above structure. For example, the second control valve 67 may be configured to include a single electromagnetic proportional valve, or it may be a structure in which multiple such second control valves 67 are provided.

[0066] The actuation of each of the aforementioned electromagnetic proportional valves included in the second control valve 67 is based on a drive command output from the automatic operation control device 71. According to this structure, the hydraulic excavator 1 of this embodiment is configured to be both manually operable and automatically operable. Here, automatic operation means that the hydraulic excavator 1 can be operated even without operator intervention, for example, based on the work machine 3 (see reference 3). Figure 1 The method of operating the excavation action (etc.). More specifically, the automatic control device 71 has a first control device 711 and a second control device 712. The first control device 711 and the second control device 712 are each composed of an electronic control unit, also known as an ECU (Electronic Control Unit). The first control device 711 and the second control device 712 are electrically connected. In addition, the first control device 711 and the second control device 712 are separately provided, but are not limited to this, for example, they can also be provided as one unit. The first control device 711 is connected to the monitoring device 72, the inertial measurement device 73 and the positioning device 74, and communicates with the main control device 75.

[0067] Monitoring device 72 and inertial measurement device 73 respectively monitor information about the working machine 3 and output the monitored information to the first control device 711. Specifically, monitoring device 72 is mounted on the slewing frame 42 (see reference 711). Figure 1 The monitoring device 72 is located near the front end of the machine (e.g., a limit switch) and is capable of measuring the left-right orientation of the machine 3 relative to the rotating body 4. The monitoring device 72 may be, for example, a limit switch. However, the monitoring device 72 is not limited to a limit switch; it may also be, for example, an angle sensor.

[0068] The inertial measurement unit 73 is a device comprising angular velocity sensors on three axes and acceleration sensors in three directions, capable of measuring the attitude of the work machine 3. The inertial measurement unit 73 is respectively installed on the boom 31, arm 32, and bucket 33 (all refer to...). Figure 1The inertial measurement unit 73 can be replaced by an angle sensor to measure the vertical and horizontal orientations (rotation angles) of the boom 31, arm 32, and bucket 33, respectively.

[0069] Positioning device 74 includes positioning antenna group 445 (see reference) Figure 2 The positioning antenna group 445 obtains the position of the hydraulic excavator 1, for example, as latitude and longitude information, using positioning signals received from positioning satellites. The positioning device 74 performs positioning, for example, by receiving positioning signals from a base station (not shown) using a suitable method, and employing the known RTK-GNSS (Real-Time Kinematic GNSS) method. The positioning device 74 outputs the position information of the hydraulic excavator 1 to the first control device 711. Alternatively, the positioning device 74 may also perform positioning using other methods, such as DGNSS (Differential GNSS). Furthermore, a total station can be installed externally to the hydraulic excavator 1, and positioning of the hydraulic excavator 1 can be performed using a prism, light receiver, etc., corresponding to the total station.

[0070] The main control unit 75, like the automatic operation control unit 71, is composed of an electronic control unit, also known as an ECU. Specifically, the main control unit 75 consists of multiple electronic control units capable of communicating with each other, but it is not limited to this; for example, it could also consist of a single electronic control unit. The main control unit 75 performs control of the hydraulic excavator 1, for example, regarding automatic operation. As an example, the main control unit 75 controls the speed of the engine 454 or the discharge rate of the main pump 611. In addition to performing the above-mentioned controls, the main control unit 75 also communicates with the first control unit 711, transmitting information related to the hydraulic excavator 1 (i.e., the support body 2 and the body 5) held by the main control unit 75 to the first control unit 711.

[0071] Construction data is provided to the first control device 711 from a server storing construction data (design data) via a communication line such as the Internet. However, the acquisition of construction data by the first control device 711 is not limited to the above method; for example, the first control device 711 may also store the construction data in advance.

[0072] The first control device 711 calculates the drive command for the second control valve 67 based on various information obtained from the monitoring device 72, the inertial measurement device 73, the positioning device 74, and the main control device 75, as well as the aforementioned construction data, and outputs it to the second control device 712. The second control device 712 controls the second control valve 67 based on the drive command output from the first control device 711. This drives the second control valve 67 and, based on the drive of the second control valve 67, controls the first control valve 63. As a result, the operation of the hydraulic excavator 1 (e.g., the digging action of the work machine 3) is performed automatically. Therefore, the automatic operation control devices 71 (first control device 711 and second control device 712) control the hydraulic excavator 1 based on the posture information of the machine body 5 (especially the work machine 3), the position information of the hydraulic excavator 1, and the construction data.

[0073] In this embodiment, the second control valve 67 is also referred to as control valve CV1, and the first control valve 63 is also referred to as other control valve CV2. That is, the hydraulic excavator 1 has control valve CV1 (second control valve 67 in this embodiment) and other control valve CV2 (first control valve 63 in this embodiment). In addition, control valve CV1 controls other control valve CV2, and other control valve CV2 controls the flow direction and flow rate of the working oil supplied from hydraulic pump 61 (main pump 611 in this embodiment) to hydraulic actuator 64.

[0074] As described above, in this embodiment, the second control valve 67 is also referred to as control valve CV1, and the first control valve 63 is also referred to as other control valve CV2. Furthermore, the first control valve 63 constitutes the hydraulic device HE. The hydraulic device HE can be configured to include a remote control valve 66, etc., in addition to the first control valve 63. However, the hydraulic device HE is configured to exclude the second control valve 67. Therefore, the hydraulic excavator 1 includes: the hydraulic device HE (the first control valve 63 in this embodiment), which controls the movement of the machine body 5; and the control valve CV1 (the second control valve 67 in this embodiment), which controls the hydraulic device HE. Additionally, the hydraulic device HE has another control valve (the first control valve 63 in this embodiment) that controls the flow direction and flow rate of the working oil supplied from the hydraulic pump 61 (the main pump 611 in this embodiment) to the hydraulic actuator 64.

[0075] In addition, such as Figure 3BAs shown, the first control device 711 can constitute an electrical assembly device EE1, and the second control device 712 can constitute another electrical assembly device EE2. That is, the hydraulic excavator 1 has an electrical assembly device EE1 (the first control device 711 in this embodiment) and other electrical assembly devices EE2 (the second control device 712 in this embodiment). In addition, the other electrical assembly devices EE2 are controlled by the electrical assembly device EE1 and control the control valve CV1 (the second control valve 67 in this embodiment).

[0076] In addition to the first control device 711, the electrical assembly equipment EE1 may also include various electrical components such as relays. In addition to the second control device 712, other electrical assembly equipment EE2 may also include the aforementioned electrical components.

[0077] From the viewpoint that a hydraulic excavator 1 capable of automatic operation can be easily realized by having a structure that includes a control valve CV1 and other control valves CV2 that control the flow direction and flow rate of the working oil supplied from the hydraulic pump 61 to the hydraulic actuator 64, the following structure is preferred. That is, as in this embodiment, the control valve CV1 preferably controls the other control valves CV2.

[0078] Furthermore, the first control valve 63 constitutes the hydraulic device HE. The hydraulic device HE can be configured to include a remote control valve 66, etc., in addition to the first control valve 63. However, the hydraulic device HE is configured to exclude the second control valve 67.

[0079] In this embodiment, the first control device 711 is also referred to as controller CU1, and the second control device 712 is also referred to as other controller CU2. That is, the hydraulic excavator 1 has controller CU1 (first control device 711 in this embodiment). In addition, the hydraulic excavator 1 has other controller CU2 (second control device 712 in this embodiment), which is controlled by controller CU1 and controls control valve CV1 (second control valve 67 in this embodiment).

[0080] [3. Structure of the Rotating Frame]

[0081] based on Figure 4A and Figure 5A The structure of the rotating frame 42 is described. Figure 4A and Figure 5AThis is a perspective view and a top view showing the structure of the slewing frame 42 as viewed from the right rear. The slewing frame 42 includes a base plate 421, a pair of longitudinal plates 422, a swing support 423, a first connecting plate 424, a second connecting plate 425, and a counterweight mounting plate 426. That is, the hydraulic excavator 1 includes a base plate 421, a pair of longitudinal plates 422, a swing support 423, a first connecting plate 424, a second connecting plate 425, and a counterweight mounting plate 426. Furthermore, in this embodiment, the first connecting plate 424 is also referred to as connecting plate CP1, and the second connecting plate 425 is also referred to as another connecting plate CP2. That is, the hydraulic excavator 1 includes connecting plate CP1 (first connecting plate 424 in this embodiment) and another connecting plate CP2 (second connecting plate 425 in this embodiment).

[0082] The substrate 421 is composed of a metal plate-shaped member extending in both the front-back and left-right directions. More specifically, the outer periphery 421B1 of the rear portion 421B of the substrate 421 is formed such that its width in the left-right direction increases as it moves from the rear to the front. Specifically, the outer periphery 421B1 is formed in an arc shape. However, the shape of the substrate 421 is not limited to the above shape. For example, when viewed from above, the substrate 421 can be circular, elliptical, rectangular, square, or a polygon other than a rectangle or square.

[0083] The base plate 421 is disposed at the bottom 42D of the rotating frame 42. As described above, the rotating frame 42 itself is disposed at the bottom 5D of the body 5 (see also...). Figure 1 and Figure 2 Therefore, the substrate 421 is located at the bottom 5D of the body 5.

[0084] A pair of vertical plates 422 are each composed of metal plate-shaped members extending in the front-back direction and the vertical direction, respectively. The pair of vertical plates 422 are vertically arranged on the substrate 421 relative to the substrate 421. Specifically, the pair of vertical plates 422 are arranged almost entirely from the front end to the rear end of the substrate 421. That is, the pair of vertical plates 422 extend on the substrate 421 in the front-back direction of the body 5. More specifically, one of the vertical plates 422a is located on the left side of the substrate 421, and the other vertical plate 422b is located on the right side of the substrate 421. Specifically, one vertical plate 422a is located to the left of the central portion 421C in the left-right direction of the substrate 421, and the other vertical plate 422b is located to the right of the central portion 421C. Furthermore, in this embodiment, when viewed from above, the front end of a vertical plate 422a slightly overlaps with the central portion 421C of the substrate 421, but this is not a limitation. It is also possible to form a vertical plate 422a that is located to the left of the central portion 421C.

[0085] The rear portion of a longitudinal plate 422a is configured to extend straight in the front-rear direction, while its front portion is configured to extend in a direction inclined to the right relative to the front-rear direction. However, the structure of the longitudinal plate 422a is not limited to the above-described structure; for example, it may also be a structure that extends straight in the front-rear direction throughout. The other longitudinal plate 422b is configured to extend straight in the front-rear direction. However, the structure of the other longitudinal plate 422b is not limited to the above-described structure; for example, it may also be a structure with partial bending. Specifically, the right side 422aR of one longitudinal plate 422a and the left side 422bL of the other longitudinal plate 422b are positioned opposite each other.

[0086] The front ends of each longitudinal plate 422 are connected to the swing support portion 423. The swing support portion 423 is disposed at the front end of the rotating frame 42 and connects the swing bracket 41 (see reference). Figure 1 and Figure 2 The support is designed to allow rotation in the left and right directions.

[0087] The first connecting plate 424 is constructed by bending the upper end of a metal plate-shaped member extending in both the left-right and up-down directions forward. The bent upper end is connected to the rear end of the swing support portion 423. Therefore, the first connecting plate 424 is located behind the swing support portion 423 and adjacent to it. Furthermore, the lower end of the first connecting plate 424 is connected to the upper surface of the front side of the substrate 421. The left end of the first connecting plate 424 is connected to the front of a vertical plate 422a, and the right end of the first connecting plate 424 is connected to the front of another vertical plate 422b. Therefore, the connecting plate CP1 (the first connecting plate 424 in this embodiment) is disposed on the front side of the substrate 421 and connects a pair of vertical plates 422. In addition, the first connecting plate 424 is provided with an opening 424a that extends through the front side in a direction that is inclined downward relative to the front-back direction.

[0088] The second connecting plate 425 is composed of a metal plate-shaped member extending in the left-right direction. The second connecting plate 425 is disposed behind the first connecting plate 424. The lower end of the second connecting plate 425 is connected to the upper surface of the rear side of the substrate 421. The left end of the second connecting plate 425 is connected to the rear part of a vertical plate 422a, and the right end of the second connecting plate 425 is connected to the rear part of another vertical plate 422b. Therefore, the other connecting plate CP2 (the second connecting plate 425 in this embodiment) is disposed behind the substrate 421 and connects the pair of vertical plates 422.

[0089] Counterweight mounting plate 426 is for mounting counterweight 46 (see reference) Figure 1 and Figure 2The counterweight mounting plate 426 is composed of a metal plate-shaped component extending in the left-right direction. The counterweight mounting plate 426 is disposed behind the second connecting plate 425. Specifically, the counterweight mounting plate 426 is disposed vertically relative to the base plate 421 at the rear end of the base plate 421.

[0090] The slewing frame 42 is equipped with: a control unit 44 and a fuel tank 453 (both referenced). Figure 2 The equipment includes a working oil tank 62, a first control valve 63, a second control valve 67, a first control device 711, and a second control device 712 (all referring to Figure 3). The above equipment is fixed to the rotating frame 42 using appropriate fixing components (support bars, etc.) as needed. The configuration structure of the above equipment will be described below.

[0091] In addition, Figure 4B and Figure 5B In the example shown, the pair of vertical plates 422 are each composed of metal plate-like components extending in the front-back direction and the vertical direction, respectively. The pair of vertical plates 422 are vertically arranged on the substrate 421 relative to the substrate 421. Specifically, the pair of vertical plates 422 are arranged almost entirely from the front end to the rear end of the substrate 421. That is, the pair of vertical plates 422 extend on the substrate 421 in the front-back direction of the body 5. More specifically, one of the vertical plates 422a is located on the right side of the substrate 421, and the other vertical plate 422b is located on the left side of the substrate 421. Specifically, one vertical plate 422a is located to the right of the central portion 421C in the left-right direction of the substrate 421, and the other vertical plate 422b is located to the left of the central portion 421C. That is, one vertical plate 422a is located on the right side in the left-right direction relative to the central portion 421C of the substrate 421 in the left-right direction of the body 5. In addition, another vertical plate 422b is disposed on the left side in the left-right direction relative to the central portion 421C of the substrate 421.

[0092] Furthermore, in this example, when viewed from above, the front end of another vertical plate 422b slightly overlaps with the central portion 421C of the substrate 421, but this is not a limitation. It is also possible for the entire other vertical plate 422b to be positioned further to the left than the central portion 421C.

[0093] One longitudinal plate 422a is configured to extend straight in the front-to-back direction. However, the structure of the longitudinal plate 422a is not limited to the above-described structure; for example, it can also be a structure with partial bending. The rear portion of the other longitudinal plate 422b is configured to extend straight in the front-to-back direction, and its front portion is configured to extend in a direction inclined to the right relative to the front-to-back direction. However, the structure of the other longitudinal plate 422b is not limited to the above-described structure; for example, it can also be a structure that extends straight in the front-to-back direction as a whole. In particular, the left side surface 422aL of one longitudinal plate 422a and the right side surface 422bR of the other longitudinal plate 422b are located opposite each other.

[0094] A pair of vertical plates 422 are each composed of metal plate-shaped members extending in the front-back direction and the vertical direction, respectively. The pair of vertical plates 422 are vertically arranged on the substrate 421 relative to the substrate 421. Specifically, the pair of vertical plates 422 are arranged almost entirely from the front end to the rear end of the substrate 421. That is, the pair of vertical plates 422 extend on the substrate 421 in the front-back direction of the body 5. More specifically, one of the vertical plates 422a is located on the right side of the substrate 421, and the other vertical plate 422b is located on the left side of the substrate 421. Specifically, one vertical plate 422a is located to the right of the center portion 421C in the left-right direction of the substrate 421, and the other vertical plate 422b is located to the left of the center portion 421C. That is, one vertical plate 422a is located on the right side in the left-right direction relative to the center portion 421C of the substrate 421 in the left-right direction of the body 5. In addition, another vertical plate 422b is disposed on the left side in the left-right direction relative to the central portion 421C of the substrate 421.

[0095] Furthermore, in this example, when viewed from above, the front end of another vertical plate 422b slightly overlaps with the central portion 421C of the substrate 421, but this is not a limitation. It is also possible for the entire other vertical plate 422b to be located to the left of the central portion 421C.

[0096] One longitudinal plate 422a is configured to extend straight in the front-to-back direction. However, the structure of the longitudinal plate 422a is not limited to the above-described structure; for example, it may also be a structure with partial bending. The rear portion of the other longitudinal plate 422b is configured to extend straight in the front-to-back direction, and the front portion is configured to extend in a direction inclined to the right relative to the front-to-back direction. However, the structure of the other longitudinal plate 422b is not limited to the above-described structure; for example, it may also be a structure that extends straight in the front-to-back direction throughout. In particular, the left side surface 422aL of one longitudinal plate 422a and the right side surface 422bR of the other longitudinal plate 422b are located opposite each other.

[0097] In this example, the first connecting plate 424 is constructed by bending the upper end of a metal plate-shaped member extending in both the left-right and up-down directions forward. The bent upper end is connected to the rear end of the swing support portion 423. Therefore, the first connecting plate 424 is located behind the swing support portion 423 and adjacent to it. Furthermore, the lower end of the first connecting plate 424 is connected to the upper surface of the front side of the substrate 421. The right end of the first connecting plate 424 is connected to the front of a vertical plate 422a, and the left end of the first connecting plate 424 is connected to the front of another vertical plate 422b. Therefore, the connecting plate CP1 (the first connecting plate 424 in this embodiment) is disposed on the front side of the substrate 421 and connects a pair of vertical plates 422. Additionally, the first connecting plate 424 is provided with an opening 424a that extends through the front side in a direction inclined downwards relative to the front-back direction.

[0098] The second connecting plate 425 is composed of a metal plate-shaped member extending in the left-right direction. The second connecting plate 425 is disposed behind the first connecting plate 424. The lower end of the second connecting plate 425 is connected to the upper surface of the rear side of the substrate 421. The right end of the second connecting plate 425 is connected to the rear part of a vertical plate 422a, and the left end of the second connecting plate 425 is connected to the rear part of another vertical plate 422b. Therefore, the other connecting plate CP2 (the second connecting plate 425 in this embodiment) is disposed behind the substrate 421 and connects the pair of vertical plates 422.

[0099] [4-1. Configuration structure of controllers, etc.]

[0100] Figure 6A , Figure 7A and Figure 8A These are top views, perspective views from the left rear, and perspective views from the left front, showing the configuration structure of the control unit 44, the first control device 711, etc. Figure 7A and Figure 8A For convenience, the illustration of the control unit 44 has been omitted.

[0101] The operating part 44 is disposed on the left side of the rotating frame 42. More specifically, the operating part 44 is disposed to the left of the center portion 421C in the left-right direction of the substrate 421. That is, the operating part 44 is disposed on the left side in the left-right direction relative to the center portion 421C of the substrate 421. In addition, the operating part 44 is located at a position that overlaps with a portion of a vertical plate 422a when viewed from above. However, the operating part 44 may also be a structure that completely overlaps with a vertical plate 422a when viewed from above. That is, the operating part 44 is disposed such that it overlaps with at least a portion of one of the pair of vertical plates 422a when viewed from above.

[0102] On the other hand, the operating unit 44 is configured such that it does not overlap with the first control device 711 when viewed from above. Specifically, the operating unit 44 and the first control device 711 are offset in the left-right direction. In particular, the first control device 711 is located to the right of the operating unit 44. That is, the controller CU1 (the first control device 711 in this embodiment) is offset to the right of the operating unit 44 in the left-right direction when viewed from above. More specifically, the first control device 711 is fixed to the front side of the left side 422bL of another vertical plate 422b by fastening connecting parts (not shown) such as bolts. That is, the controller CU1 (the first control device 711 in this embodiment) is mounted on the other vertical plate 422b of the pair of vertical plates 422. However, the controller CU1 may also be mounted on one of the vertical plates 422a. That is, the controller CU1 is mounted on either of the pair of vertical plates 422.

[0103] From the viewpoint of securely mounting the controller CU1 and increasing the freedom of configuration layout of the controller CU1, as in this embodiment, it is preferable to mount the controller CU1 on either of the pair of vertical plates 422.

[0104] As described above, the left side 422bL of another longitudinal plate 422b is located opposite the right side 422aR of one longitudinal plate 422a. Therefore, the first control device 711, fixed to the left side 422bL of the other longitudinal plate 422b, is located to the left of the other longitudinal plate 422b and to the right of one longitudinal plate 422a. That is, the controller CU1 (the first control device 711 in this embodiment) is disposed between a pair of longitudinal plates 422 (between one longitudinal plate 422a and the other longitudinal plate 422b in the left-right direction). Furthermore, since the space between the pair of longitudinal plates 422 is located behind the work machine 3, it is difficult to use as equipment placement space in order to avoid interference with the work machine 3 and to protect it from damage by sand or other debris falling from the work machine 3. In other words, the space between the pair of longitudinal plates 422 is a dead zone space.

[0105] Based on the above structure, the dead space between the pair of vertical plates 422 can be effectively and flexibly utilized, thus enabling efficient configuration of the controller CU1. Furthermore, since the pair of vertical plates 422 extend in the front-to-back direction, operation of the controller CU1 from the front or rear of the space between the pair of vertical plates 422 is unimpeded by the plates. Therefore, by operating from the front or rear of the space between the pair of vertical plates 422, connecting cables and other connecting components to the controller CU1 can be easily performed, simplifying connection operations to the controller CU1. As described above, efficient configuration of the controller CU1 is achieved, and connection operations to the controller CU1 are simplified. Moreover, with a lower height for the pair of vertical plates 422, operation of the controller CU1 is less likely to be obstructed by the plates even when operating from the left or right side of the plates 422. Therefore, by setting a lower height for the pair of vertical plates 422, reliable simplification of connection operations to the controller CU1 can be achieved.

[0106] It is desirable that the hydraulic excavator 1 have a structure that includes a control unit 44 for the operator to ride on and operate the machine body 5, thereby improving the operability (ease of getting on and off) of the control unit 44 from the left side in the left-right direction relative to the machine body 5. However, for example, if the control unit 44 is offset to the left side in the left-right direction relative to a vertical plate 422a (located on the left side in the left-right direction of the base plate 421) when viewed from above, the amount of the control unit 44 exposed from the base plate 421 may increase. In order to achieve miniaturization of the machine body 5, it is desirable to suppress the increase of the above-mentioned exposure amount. According to this view, as in this embodiment, the control unit 44 is preferably arranged so that, when viewed from above, it overlaps with at least a portion of a vertical plate 422a on the left side in the left-right direction relative to the central portion 421C of the base plate 421 in the left-right direction of the machine body 5.

[0107] When the controller CU1 (in this embodiment, the first control device 711) is positioned on the left side of the left-right direction relative to the operating unit 44, which is located further to the left in the left-right direction than the central part 421C, it becomes difficult to position the controller CU1 between the pair of vertical plates 422. Furthermore, if the controller CU1 is positioned to overlap with the operating unit 44 when viewed from above, the operating unit 44 will obstruct operation of the controller CU1 from a position higher (or lower) than the controller CU1. Therefore, from the viewpoint of easily implementing a structure where the controller CU1 is positioned between the pair of vertical plates 422 and avoiding the obstruction of operation of the controller CU1 by the operating unit 44 as described above, the following structure is preferred. That is, as in this embodiment, it is preferable that the controller CU1 is positioned offset to the right side of the operating unit 44 in the left-right direction when viewed from above.

[0108] From the viewpoint of securely mounting the controller CU1 and easily avoiding obstruction of operation of the controller CU1 from a position higher (or lower) than the controller CU1 by the operating part 44, the following structure is preferred. That is, as in this embodiment, it is preferable to mount the controller CU1 on the other longitudinal plate 422b of a pair of longitudinal plates 422.

[0109] The fuel tank 453 is located to the right of the other vertical plate 422b. As described above, the other vertical plate 422b is located further to the right than the central portion 421C in the left-right direction of the substrate 421. Therefore, the container TK (fuel tank 453 in this embodiment) is positioned to the right in the left-right direction relative to the central portion 421C of the substrate 421. More specifically, the fuel tank 453 and the other vertical plate 422b are arranged in the left-right direction. That is, the other vertical plate 422b is offset to the left in the left-right direction relative to the container TK when viewed from above.

[0110] Preferably, the other vertical plate 422b for fixing the controller CU1 is configured to be separate from the operating part 44, thereby reliably preventing the operating part 44 from obstructing operation of the controller CU1 from a position higher (or lower) than the controller CU1. Furthermore, to efficiently improve the strength of the base plate 421, it is preferable to configure the other vertical plate 422b near the central portion 421C in the left-right direction of the base plate 421. Based on this viewpoint, as in this embodiment, the hydraulic excavator 1 is preferably configured with a container TK (in this embodiment, a fuel tank 453) positioned on the right side in the left-right direction relative to the central portion 421C, as follows: That is, the other vertical plate 422b is preferably offset to the left in the left-right direction relative to the container TK when viewed from above.

[0111] The working oil tank 62 is located behind the fuel tank 453, and the first control valve 63 is located on the right side of the working oil tank 62. Specifically, the first control valve 63 is located on the right side of the substrate 421. Therefore, the other control valve CV2 (the first control valve 63 in this embodiment) is arranged on the right side in the left-right direction relative to the central portion 421C of the substrate 421.

[0112] If other control valves CV2 are arranged on the same side as the operating part 44 in the left-right direction relative to the central portion 421C of the substrate 421, a portion of the space allocated to the operating part 44 may be used as space for the other control valves CV2. This would result in a smaller space for the operating part 44 and a decrease in its adaptability. Therefore, it is preferable to arrange the other control valves CV2 on the opposite side of the operating part 44 in the left-right direction relative to the central portion 421C of the substrate 421, thereby ensuring the adaptability of the operating part 44. Based on this viewpoint, as in this embodiment, it is preferable to arrange the other control valves CV2 on the right side in the left-right direction relative to the central portion 421C of the substrate 421.

[0113] In addition to the first control device 711, a second control valve 67 is disposed between a pair of vertical plates 422. More specifically, the second control valve 67 is disposed opposite the front of the first control device 711. Furthermore, the second control valve 67 is disposed opposite the right side 422aR of one of the vertical plates 422a. Therefore, the control valve CV1 (the second control valve 67 in this embodiment) is disposed opposite both the controller CU1 (the first control device 711 in this embodiment) and one of the vertical plates 422a. In addition, the second control valve 67 is fixed to the base plate 421 by means of the first bracket BK1.

[0114] Based on the viewpoint of simplifying the connection structure of the associated equipment that is indirectly (or directly) associated with the automatic operation of the hydraulic excavator 1 and centrally configured, and effectively and flexibly utilizing the dead space located opposite a longitudinal plate 422a, the following structure is preferred. That is, as in this embodiment, the hydraulic excavator 1 preferably includes: a control valve CV1 (a second control valve 67 in this embodiment) configured to be opposite both the controller CU1 (a first control device 711 in this embodiment) and a longitudinal plate 422a.

[0115] The second control valve 67 is configured to face the first connecting plate 424, in addition to the first control device 711 and a longitudinal plate 422a. More specifically, the rear surface of the first connecting plate 424 faces rearward, and the second control valve 67 is located opposite the rear surface of the first connecting plate 424. Therefore, the control valve CV1 (the second control valve 67 in this embodiment) is configured to face the connecting plate CP1 (the first connecting plate 424 in this embodiment). Furthermore, in addition to the second control valve 67, the first control device 711, which faces the second control valve 67, is located opposite the rear surface of the first connecting plate 424. That is, the controller CU1 (the first control device 711 in this embodiment) is configured to face the connecting plate CP1 (the first connecting plate 424 in this embodiment).

[0116] From the viewpoint that the hydraulic excavator 1 improves the operability of the controller CU1 from the front of the base plate 421 (body 5) by having a connecting plate CP1 disposed on the front side of the base plate 421 and connecting a pair of longitudinal plates 422, the following structure is preferred. That is, as in this embodiment, the controller CU1 is preferably configured to face the connecting plate CP1.

[0117] The first connecting plate 424 supports the second control device 712 from below via the second bracket BK2. That is, the other controller CU2 (the second control device 712 in this embodiment) is supported on the connecting plate CP1 (the first connecting plate 424 in this embodiment). In addition to the second control device 712, various electrical components (such as relays, connectors, etc.) are also mounted on the second bracket BK2.

[0118] Based on the view that even if the hydraulic excavator 1 has a structure that includes a controller CU2 in addition to the controller CU1 and the control valve CV1, which is controlled by the controller CU1 and controls the control valve CV1, the connection structure of the above-mentioned associated equipment can be reliably simplified, the following structure is preferred. That is, as in this embodiment, the other controller CU2 is preferably supported on the connecting plate CP1.

[0119] Furthermore, like the first control device 711, the second control valve 67 is positioned in a position that does not overlap with the operating part 44 when viewed from above. Specifically, the second control valve 67 and the operating part 44 are offset in the left-right direction. In particular, the second control valve 67 is located to the right of the operating part 44. That is, the control valve CV1 (the second control valve 67 in this embodiment) is offset to the right in the left-right direction relative to the operating part 44 when viewed from above.

[0120] From the viewpoint of avoiding obstruction of the operation of the control valve CV1 from a position higher (or lower) than the control valve CV1 by the operating part 44, and of centrally arranging the control valve CV1 and the controller CU1 (the first control device 711 in this embodiment), the following structure is preferred. That is, as in this embodiment, the control valve CV1 is preferably arranged offset to the right in the left-right direction relative to the operating part 44 when viewed from above.

[0121] [4-2. Configuration structure of control valves, etc.]

[0122] Figure 6B , Figure 7B and Figure 8B These are top views, perspective views from the left rear, and perspective views from the left front, showing the configuration structure of the second control valve 67, etc. Figure 7B and Figure 8B For convenience, the illustration of the control unit 44 has been omitted.

[0123] The second control valve 67 is disposed near the front center of the base plate 421 via the first bracket BK1. More specifically, the second control valve 67 is disposed on the left side of one vertical plate 422a and on the right side of the other vertical plate 422b. That is, the control valve CV1 (the second control valve 67 in this embodiment) is disposed between a pair of vertical plates 422 (between one vertical plate 422a and the other vertical plate 422b in the left-right direction). Furthermore, the space between the pair of vertical plates 422 is located behind the work machine 3, and therefore, it is difficult to use as equipment placement space in order to avoid interference with the work machine 3 and to protect it from damage by sand or other debris falling from the work machine 3. In other words, the space between the pair of vertical plates 422 is a dead zone space.

[0124] Based on the above structure, even in a small hydraulic excavator 1 where the space on the substrate 421 is limited, it is rare for any device other than the control valve CV1 to be configured in the space between a pair of longitudinal plates 422. Therefore, the control valve CV1 can be configured easily. As described above, the control valve CV1 can be configured easily.

[0125] From the viewpoint of reliably ensuring space for arranging the control valve CV1 (in this embodiment, the second control valve 67) between the pair of longitudinal plates 422, the following structure is preferred. That is, as in this embodiment, one of the longitudinal plates 422a is preferably disposed on the right side in the left-right direction relative to the center portion 421C of the base plate 421 of the body 5. Furthermore, the other longitudinal plate 422b is preferably disposed on the left side in the left-right direction relative to the center portion 421C of the base plate 421.

[0126] In addition to the second control valve 67, a first control device 711 is disposed between a pair of longitudinal plates 422. That is, the electrical assembly equipment EE1 (the first control device 711 in this embodiment) is disposed between a pair of longitudinal plates 422. More specifically, the first control device 711 is configured such that its back side contacts the left side 422aL of one longitudinal plate 422a and is fixed by fastening connecting parts such as bolts. That is, the electrical assembly equipment EE1 (the first control device 711 in this embodiment) is mounted on one longitudinal plate 422a.

[0127] Based on the viewpoint of configuring the electrical assembly equipment EE1 (in this embodiment, the first control device 711) so that one direction (e.g., the long side direction, the short side direction, etc.) of the electrical assembly equipment EE1 is parallel to the front-rear direction of the body 5 and the electrical assembly equipment EE1 is securely mounted, the following structure is preferred. That is, as in this embodiment, it is preferable to mount the electrical assembly equipment EE1 on a longitudinal plate 422a.

[0128] As described above, a longitudinal plate 422a is configured to extend straight in the front-to-back direction; therefore, the first control device 711 is configured such that its front faces to the left. The second control valve 67 is located opposite the front of the first control device 711. That is, the control valve CV1 (the second control valve 67 in this embodiment) is configured to face the electrical assembly equipment EE1 (the first control device 711 in this embodiment).

[0129] From the viewpoint that the hydraulic excavator 1 can centrally configure the indirectly (or directly) associated equipment by having an electrical assembly device EE1 (in this embodiment, a first control device 711) disposed between a pair of longitudinal plates 422, thereby simplifying the connection structure of the aforementioned components, the following structure is preferred. That is, as in this embodiment, it is preferable to configure the control valve CV1 (in this embodiment, a second control valve 67) opposite to the electrical assembly device EE1.

[0130] The second control valve 67 is configured to face the first connecting plate 424, in addition to the first control device 711. More specifically, the rear surface of the first connecting plate 424 faces rearward, and the second control valve 67 is located opposite the rear surface of the first connecting plate 424. Therefore, the control valve CV1 (the second control valve 67 in this embodiment) is configured to face the connecting plate CP1 (the first connecting plate 424 in this embodiment).

[0131] From the viewpoint that the hydraulic excavator 1 improves the operability of the control valve CV1 from the front of the base plate 421 (body 5) by having a connecting plate CP1 disposed on the front side of the base plate 421 and connecting a pair of longitudinal plates 422, the following structure is preferred. That is, as in this embodiment, it is preferable to configure the control valve CV1 opposite to the connecting plate CP1.

[0132] The first connecting plate 424 supports the second control device 712 from below via the second bracket BK2. That is, the other electrical assembly equipment EE2 (the second control device 712 in this embodiment) is supported on the connecting plate CP1 (the first connecting plate 424 in this embodiment).

[0133] Based on the viewpoint that even if the hydraulic excavator 1 has a structure that includes other electrical assembly equipment EE2 controlled by the electrical assembly equipment EE1 and controlling the control valve CV1, in addition to the electrical assembly equipment EE1 and control valve CV1, the connection structure of the aforementioned related equipment can be reliably simplified, the following structure is preferred. That is, as in this embodiment, it is preferable to support the other electrical assembly equipment EE2 on the connecting plate CP1.

[0134] The fuel tank 453, the working fuel tank 62, and the first control valve 63 are located on a base plate 421 further to the right than a vertical plate 422a connected to the first connecting plate 424. That is, the fuel tank 453, the working fuel tank 62, and the other control valve CV2 (the first control valve 63 in this embodiment) are arranged on the right side of the base plate 421 relative to a vertical plate 422a. More specifically, the fuel tank 453 and the working fuel tank 62 are arranged in a front-rear direction. In particular, the fuel tank 453 is located in front of the working fuel tank 62. The first control valve 63 is configured to be on the right side of the working fuel tank 62, adjacent to the working fuel tank 62.

[0135] In order to automatically operate the machine body 5 by installing (adding) a control valve CV1 (second control valve 67 in this embodiment) to control the hydraulic equipment HE on the hydraulic excavator 1, it is necessary for the hydraulic equipment HE to control the movement of the machine body 5. From the viewpoint of reliably realizing the control of the movement of the machine body 5 by the hydraulic equipment HE, the following structure is preferred. That is, as in this embodiment, the hydraulic equipment HE preferably has another control valve CV2 (first control valve 63 in this embodiment) that controls the flow direction and flow rate of the working oil supplied from the hydraulic pump 61 (main pump 611 in this embodiment) to the hydraulic actuator 64.

[0136] If the other control valve CV2, which controls the movement of the machine body 5, malfunctions, controlling the movement of the machine body 5 becomes difficult. Therefore, it is preferable to position the other control valve CV2 in a location that is easily accessible from outside the machine body 5, so that even if the other control valve CV2 malfunctions, the time required for repair work can be minimized. In particular, it is preferable to position the other control valve CV2 for easy access from the side of the machine body 5. In addition, it is preferable to avoid interference with other control valves CV2 when positioning control valve CV1. Based on this viewpoint, as in this embodiment, it is preferable to position the other control valve CV2 on the right side of the base plate 421 relative to a vertical plate 422a in the left-right direction.

[0137] Another vertical plate 422b connected to the first connecting plate 424 is configured such that a portion overlaps with the operating part 44 when viewed from above. The operating part 44 is configured to be further to the left than the central portion 421C in the left-right direction of the substrate 421. That is, the operating part 44 is positioned to the left in the left-right direction relative to the central portion 421C of the substrate 421. Alternatively, the operating part 44 may have a structure that completely overlaps with the other vertical plate 422b when viewed from above. That is, the operating part 44 is configured to overlap with at least a portion of the other vertical plate 422b when viewed from above.

[0138] On the other hand, the operating unit 44 is positioned in a position that does not overlap with the second control valve 67 when viewed from above. Specifically, the operating unit 44 and the second control valve 67 are offset in the left-right direction. In particular, the second control valve 67 is located to the right of the operating unit 44. That is, the operating unit 44 is offset to the left in the left-right direction relative to the control valve CV1 (the second control valve 67 in this embodiment) when viewed from above.

[0139] Preferably, even if the hydraulic excavator 1 has a structure with an operating section 44, it is possible to avoid the operating section 44 obstructing operation of the control valve CV1 from a position higher (or lower) than the control valve CV1 (the second control valve 67 in this embodiment). Furthermore, it is preferable to improve the operability (ease of getting in and out) of the operating section 44 relative to the left side of the machine body 5 in the left-right direction. Based on this viewpoint, as in this embodiment, the hydraulic excavator 1 preferably has an operating section 44 that is offset to the left side of the control valve CV1 when viewed from above.

[0140] For example, if the control unit 44 is configured to be offset to the left in the left-right direction relative to the other vertical plate 422b when viewed from above in order to improve the aforementioned operability, the amount of the control unit 44 exposed from the substrate 421 may increase. In order to achieve miniaturization of the body 5, it is preferable to suppress the increase of the exposed amount. According to this viewpoint, as in this embodiment, it is preferable to configure the control unit 44 to overlap with at least a portion of the other vertical plate 422b when viewed from above.

[0141] The second control valve 67 and the first control valve 63 are connected via piping PP. That is, piping PP extends from the second control valve 67. Specifically, multiple piping PPs extending from the second control valve 67 are provided. The routing of the piping PPs will be described below.

[0142] [4-3. Piping Layout]

[0143] Figure 9 This is a top view showing the route of the piping PP. The piping PP is laid out such that, when viewed from above, it passes near the rotary motor 43 and the rotary joint 65. The rotary motor 43 is disposed on the base plate 421 in the rotary frame 42, and the rotary joint 65 is disposed on the support body 2. More specifically, the rotary motor 43 is disposed on the base plate 421 between a pair of longitudinal plates 422. Furthermore, the rotary motor 43 is disposed between the first connecting plate 424 and the second connecting plate 425 in the front-rear direction. The rotary joint 65 is located to the left front of the rotary motor 43 when viewed from above. The second control valve 67 is located in front of the rotary joint 65. Additionally, a portion of the rotary joint 65 rotates together with the rotary body 4.

[0144] The installed piping PP extends from the second control valve 67 to the left rearward when viewed from above, and then bends rearward. The rearward bending of the piping PP occurs between the other longitudinal plate 422b and the rotary joint 65 in the left-right direction. That is, the piping PP is installed such that, when viewed from above, it passes between the other longitudinal plate 422b and the rotary joint 65.

[0145] The rearward-extending pipe PP bends to the right rearward and extends to the vicinity of the second connecting plate 425 before bending to the right. The rightward-bending pipe PP extends through the front-rear direction between the rotary motor 43 and the second connecting plate 425. That is, the pipe PP is arranged such that, when viewed from above, it passes between the rotary motor 43 and other connecting plates CP2 (the second connecting plate 425 in this embodiment).

[0146] The piping PP, passing between the rotary motor 43 and the second connecting plate 425, extends across a vertical plate 422a to the first control valve 63, which is located further to the right of the vertical plate 422a. That is, the piping PP is laid from the right side in the left-right direction relative to the vertical plate 422a to the left side in the left-right direction. Furthermore, the routing of the piping PP is not limited to the above-described route; for example, the piping PP may also be laid through a through hole provided in the left-right direction within the vertical plate 422a.

[0147] For example, if the piping PP extending from the control valve CV1 (second control valve 67 in this embodiment) is fixed to the rotary motor 43, the fixing of the piping PP needs to be released when the rotary motor 43 is disassembled. Therefore, in order to reduce the time spent disassembling the rotary motor 43, it is preferable to arrange the piping PP separately from the rotary motor 43. In addition, it is desirable to efficiently arrange the piping PP by effectively utilizing the dead space between the rotary motor 43 and other connecting plates CP2 (second connecting plate 425 in this embodiment). Based on this viewpoint, as in this embodiment, the hydraulic excavator 1 preferably has a structure that includes the rotary motor 43 and other connecting plates CP2, such that the piping PP passes between the rotary motor 43 and other connecting plates CP2 when viewed from above.

[0148] The hydraulic excavator 1 preferably utilizes the dead space between the other longitudinal plate 422b and the swivel joint 65 to efficiently lay out the piping PP by effectively and flexibly using the structure with the swivel joint 65. According to this view, as in this embodiment, it is preferable to lay out the piping PP so that it passes between the other longitudinal plate 422b and the swivel joint 65 when viewed from above.

[0149] From the viewpoint of reliably realizing the structure of the piping PP extending from the control valve CV1 (the second control valve 67 in this embodiment) to a device (such as the first control valve 63, etc.) located on the opposite side of the control valve CV1 in the left-right direction relative to a vertical plate 422a, the following structure is preferred. That is, as in this embodiment, it is preferable to arrange the piping PP from the right side in the left-right direction to the left side in the left-right direction relative to a vertical plate 422a.

[0150] [5. Supplement]

[0151] This embodiment is not limited to the embodiments described herein. For example, the left-right arrangement of each structural component can be reversed. That is, each structural component can be arranged in a position opposite to the example of the above embodiment in the left-right direction.

[0152] 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 wheel loader or a mobile crane. In addition, the working machinery may also be agricultural machinery such as a combine harvester or a tractor.

[0153] [6. Postscript]

[0154] The hydraulic excavator 1 described in this embodiment can also be described as the working machine shown in the following notes (1) to (13).

[0155] The machinery required for operation in Appendix (1) includes:

[0156] The substrate, located at the bottom of the body; and

[0157] A pair of longitudinal plates are arranged on the base plate along the front-rear direction of the body, wherein...

[0158] The operating machinery includes a controller disposed between the pair of longitudinal plates.

[0159] The operating machinery in Appendix (2) is based on the operating machinery recorded in Appendix (1), wherein,

[0160] The work machinery includes a control unit for operators to ride on and operate the machine.

[0161] The operating part is configured such that, when viewed from above, it is located on the left side of the left-right direction relative to the center of the base plate of the machine body, and overlaps with at least a portion of one of the pair of longitudinal plates.

[0162] The operating machinery in Appendix (3) is based on the operating machinery recorded in Appendix (2), wherein,

[0163] The controller is configured to be offset to the right relative to the control unit in the left-right direction when viewed from above.

[0164] The operating machinery in Appendix (4) is based on the operating machinery recorded in Appendix (2) or (3), wherein,

[0165] The controller is installed on either of the pair of longitudinal plates.

[0166] The operating machinery in Appendix (5) is based on the operating machinery recorded in Appendix (4), wherein,

[0167] The controller is installed on the other of the pair of longitudinal plates.

[0168] The operating machinery in Appendix (6) is based on the operating machinery recorded in Appendix (5), wherein,

[0169] The operating machinery includes a container disposed on the right side in the left-right direction relative to the central part.

[0170] The other vertical plate is configured to be offset to the left in the left-right direction relative to the container when viewed from above.

[0171] The operating machinery in Appendix (7) is based on the operating machinery recorded in Appendix (6), wherein,

[0172] The operating machinery includes an engine cover component that covers the right side of the container in the left-right direction.

[0173] The operating machinery in Appendix (8) is based on the operating machinery recorded in any of Appendix (2) to (7), wherein,

[0174] The working machine includes: a connecting plate disposed on the front side of the base plate and connecting the pair of longitudinal plates.

[0175] The controller is configured to be opposite the connecting plate.

[0176] The operating machinery in Appendix (9) is based on the operating machinery recorded in Appendix (8), among which,

[0177] The operating machinery includes a control valve configured to be opposite both the controller and the longitudinal plate.

[0178] The operating machinery in Appendix (10) is based on the operating machinery recorded in Appendix (9), among which,

[0179] The control valve is configured such that, when viewed from above, it is offset to the right relative to the operating part in the left-right direction.

[0180] The operating machinery in Appendix (11) is based on the operating machinery recorded in Appendix (9) or (10), wherein,

[0181] The operating machinery includes: other controllers controlled by the controller and which also control the control valve.

[0182] The other controllers are supported on the connecting plate.

[0183] The operating machinery in Appendix (12) is based on the operating machinery recorded in any of Appendix (9) to (11), wherein,

[0184] The operating machinery includes:

[0185] A hydraulic pump, which is driven by a power source;

[0186] A hydraulic actuator, driven by working oil discharged from the hydraulic pump; and

[0187] Other control valves control the flow direction of the working oil supplied from the hydraulic pump to the hydraulic actuator.

[0188] The control valve controls the other control valves.

[0189] The operating machinery in Appendix (13) is based on the operating machinery recorded in Appendix (12), among which,

[0190] The other control valves are positioned on the right side of the left-right direction relative to the central portion.

[0191] In addition, the hydraulic excavator 1 described in this embodiment can also be described as the working machine shown in the following notes (14) to (25).

[0192] The operating machinery required in Appendix (14) includes:

[0193] The base plate is located at the bottom of the machine body;

[0194] A pair of longitudinal plates are arranged on the base plate along the front-rear direction of the body;

[0195] Hydraulic equipment that controls the movement of the machine body; and

[0196] A control valve that controls the hydraulic equipment, wherein...

[0197] The control valve is positioned between the pair of longitudinal plates.

[0198] The operating machinery in Appendix (15) is based on the operating machinery recorded in Appendix (14), among which,

[0199] One of the pair of longitudinal plates is positioned on the right side of the base plate in the left-right direction, relative to the center of the base plate of the machine body.

[0200] The other of the pair of longitudinal plates is positioned to the left of the central portion in the left-right direction.

[0201] The operating machinery in Appendix (16) is based on the operating machinery recorded in Appendix (15), among which,

[0202] The operating machinery includes:

[0203] A hydraulic pump, which is driven by a drive source; and

[0204] A hydraulic actuator, driven by working oil discharged from the hydraulic pump,

[0205] The hydraulic equipment includes: other control valves for controlling the flow direction of the working oil supplied from the hydraulic pump to the hydraulic actuator.

[0206] The other control valves are disposed on the right side of the base plate in the left-right direction relative to the longitudinal plate.

[0207] The operating machinery in Appendix (17) is based on the operating machinery recorded in Appendix (15) or (16), wherein,

[0208] The operating machine includes an operating part configured to be offset to the left relative to the control valve in the left-right direction when viewed from above.

[0209] The operating machinery in Appendix (18) is based on the operating machinery recorded in Appendix (17), among which,

[0210] The control unit is configured to overlap with at least a portion of the other longitudinal plate when viewed from above.

[0211] The operating machinery in Note (19) is based on the operating machinery recorded in any of Notes (15) to (18), wherein,

[0212] The working machine includes: a connecting plate disposed on the front side of the base plate and connecting the pair of longitudinal plates.

[0213] The control valve is configured to be opposite the connecting plate.

[0214] The operating machinery in Appendix (20) is based on the operating machinery recorded in Appendix (19), among which,

[0215] The operating machinery includes: electrical assembly equipment disposed between the pair of longitudinal plates.

[0216] The control valve is configured to be opposite the electrical assembly equipment.

[0217] The operating machinery in Appendix (21) is based on the operating machinery recorded in Appendix (20), among which,

[0218] The operating machinery includes: other electrical assembly equipment controlled by the electrical assembly equipment and controlling the control valve.

[0219] The other electrical assembly equipment is supported on the connecting plate.

[0220] The operating machinery in Appendix (22) is based on the operating machinery recorded in Appendix (20) or (21), wherein,

[0221] The electrical assembly equipment is installed on one of the longitudinal plates.

[0222] The operating machinery in Appendix (23) is based on the operating machinery recorded in any of Appendix (19) to (22), wherein,

[0223] The operating machinery includes:

[0224] A support body that supports the machine body so that it can rotate;

[0225] A rotary motor, disposed on the base plate, causes the machine body to rotate relative to the support; and

[0226] Other connecting plates, which are disposed on the rear side of the substrate and connect the pair of longitudinal plates,

[0227] The piping extending from the control valve is arranged such that, when viewed from above, it passes between the rotary motor and the other connecting plates.

[0228] The operating machinery in Appendix (24) is based on the operating machinery recorded in Appendix (23), among which,

[0229] The operating machinery includes a rotary joint that connects the first oil passage of the machine body and the second oil passage of the support body.

[0230] The piping is arranged such that, when viewed from above, it passes between the other longitudinal plate and the rotary joint.

[0231] The operating machinery in Appendix (25) is based on the operating machinery recorded in Appendix (23) or (24), wherein,

[0232] The piping is laid out from the right side of the left-right direction to the left side of the left-right direction relative to the longitudinal plate.

[0233] 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 extended or modified within the scope of the spirit of the invention.

[0234] [Potential for Industrial Applications]

[0235] This invention can be used, for example, in construction machinery, agricultural machinery, and other operating machinery.

Claims

1. A type of operating machinery, comprising: The substrate, located at the bottom of the body; and A pair of longitudinal plates are arranged on the base plate along the front-rear direction of the body, wherein... The operating machinery has a controller configured between the pair of longitudinal plates.

2. The operating machinery according to claim 1, wherein, The work machinery includes a control unit for operators to ride on and operate the machine. The operating part is configured such that, when viewed from above, it is located on the left side of the left-right direction relative to the center of the base plate of the machine body, and overlaps with at least a portion of one of the pair of longitudinal plates.

3. The operating machinery according to claim 2, wherein, The controller is configured to be offset to the right relative to the control unit in the left-right direction when viewed from above.

4. The operating machinery according to claim 2, wherein, The controller is installed on either of the pair of longitudinal plates.

5. The operating machinery according to claim 4, wherein, The controller is installed on the other of the pair of longitudinal plates.

6. The operating machinery according to claim 5, wherein, The operating machinery includes a container disposed on the right side in the left-right direction relative to the central part. The other vertical plate is configured to be offset to the left in the left-right direction relative to the container when viewed from above.

7. The operating machinery according to claim 6, wherein, The operating machinery includes an engine cover component that covers the right side of the container in the left-right direction.

8. The operating machinery according to any one of claims 2 to 7, wherein, The working machine includes: a connecting plate disposed on the front side of the base plate and connecting the pair of longitudinal plates. The controller is configured to be opposite the connecting plate.

9. The operating machinery according to claim 8, wherein, The operating machinery includes a control valve configured to be opposite both the controller and the longitudinal plate.

10. The operating machinery according to claim 9, wherein, The control valve is configured such that, when viewed from above, it is offset to the right relative to the operating part in the left-right direction.

11. The operating machinery according to claim 9, wherein, The operating machinery includes: other controllers controlled by the controller and which also control the control valve. The other controllers are supported on the connecting plate.

12. The operating machinery according to claim 9, wherein, The operating machinery includes: A hydraulic pump, which is driven by a power source; A hydraulic actuator, driven by working oil discharged from the hydraulic pump; and Other control valves control the flow direction of the working oil supplied from the hydraulic pump to the hydraulic actuator. The control valve controls the other control valves.

13. The operating machinery according to claim 12, wherein, The other control valves are positioned on the right side of the left-right direction relative to the central portion.

14. A type of operating machinery, comprising: The base plate is located at the bottom of the machine body; A pair of longitudinal plates are arranged on the base plate along the front-rear direction of the body; Hydraulic equipment that controls the movement of the machine body; and A control valve that controls the hydraulic equipment, wherein... The control valve is positioned between the pair of longitudinal plates.

15. The operating machinery according to claim 14, wherein, One of the pair of longitudinal plates is positioned on the right side of the base plate in the left-right direction, relative to the center of the base plate of the machine body. The other of the pair of longitudinal plates is positioned to the left of the central portion in the left-right direction.

16. The operating machinery according to claim 15, wherein, The operating machinery includes: A hydraulic pump, which is driven by a drive source; and A hydraulic actuator, driven by working oil discharged from the hydraulic pump, The hydraulic equipment includes: other control valves for controlling the flow direction of the working oil supplied from the hydraulic pump to the hydraulic actuator. The other control valves are disposed on the right side of the base plate in the left-right direction relative to the longitudinal plate.

17. The operating machinery according to claim 16, wherein, The operating machine includes an operating part configured to be offset to the left relative to the control valve in the left-right direction when viewed from above.

18. The operating machinery according to claim 17, wherein, The control unit is configured to overlap with at least a portion of the other longitudinal plate when viewed from above.

19. The operating machinery according to claim 2, wherein, The working machine includes: a connecting plate disposed on the front side of the base plate and connecting the pair of longitudinal plates. The control valve is configured to be opposite the connecting plate.

20. The operating machinery according to claim 6, wherein, The operating machinery includes: electrical assembly equipment disposed between the pair of longitudinal plates. The control valve is configured to be opposite the electrical assembly equipment.

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