Construction machine

Abstract

The purpose of the present invention is to provide a construction machine in which a controller is mounted without hindering the field of view of an operator, and in which the time taken to maintain the controller can be shortened. To this end, provided is a hydraulic shovel provided with: a vehicle body having a working device; a cab provided to the vehicle body; an operation device which is provided inside the cab and which operates the work device; a ceiling cover that covers at least a part of the ceiling in the cab from below; and a first controller for controlling the work device during remote operation or automatic driving, the first controller having a reset button for restarting and being disposed between the ceiling and the ceiling cover so that the reset button faces downward, the ceiling cover being attached to a position covering the first controller from below, and the ceiling cover being attached to the first controller so as to cover the first controller from below. And an opening part for exposing the reset button in the cab.

Description

Technical Field

[0001] The invention relates to engineering machinery such as a hydraulic excavator. Background Art

[0002] In construction machinery, a technology is used to install sensors on the vehicle body to sense the surrounding conditions of the vehicle body (Patent Document 1). On the other hand, in recent years, in order to be able to perform operations under conditions where the access of operators is restricted, such as at disaster sites, the demand for unmanned driving in which the operator does not ride on the vehicle body but performs operations through remote operations and automatic manipulation is increasing. Here, in construction machinery capable of unmanned driving, the desired functions vary depending on the content of the operation and the use environment, so it is required to change and adjust the functions, and use a controller with high expandability that can add and change components such as sensors and software. In addition, the frequency of replacement or maintenance (software rewriting or restarting, etc.) of the controller becomes higher. In addition, in the case of a structure that is capable of not only unmanned driving but also manned driving based on the operation of the operator on board, it is necessary to configure the controller in a manner that does not hinder the field of vision of the operator on board.

[0003] Patent document 1 discloses a work vehicle having an electronic device (controller) for processing shooting data obtained by a first stereo camera and a second stereo camera respectively. The electronic device is located inside a cab and mounted on the ceiling of the cab, and the bottom of the electronic device is covered by an interior material cover.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6831799 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in the work vehicle described in Patent Document 1, it is necessary to remove the interior material cover provided on the ceiling of the cab when performing maintenance on the controller. Assuming that the protection structure of the controller disclosed in Patent Document 1 is applied to an unmanned construction machine, the maintenance work will take a long time as the frequency of maintenance of the highly expandable controller increases.

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a construction machine in which a controller is mounted without obstructing the field of vision of an operator on board and in which the time required for maintenance of the controller can be shortened.

[0010] Solutions to Solve Problems

[0011] In order to achieve the above-mentioned purpose, the present invention is a construction machinery, which comprises: a vehicle body, which has a working device; a cab, which is arranged on the above-mentioned vehicle body; an operating device, which is arranged in the above-mentioned cab and is used to operate the above-mentioned working device; a ceiling cover, which covers at least a portion of the ceiling in the above-mentioned cab from the bottom; and a first controller, which controls the above-mentioned working device during remote operation or automatic driving, wherein the above-mentioned first controller has a reset button for restarting, and the above-mentioned reset button is arranged between the above-mentioned ceiling and the above-mentioned ceiling cover with the reset button facing downward, and the above-mentioned ceiling cover is installed in a position covering the above-mentioned first controller from the bottom, and has an opening portion that exposes the above-mentioned reset button in the above-mentioned cab.

[0012] Effects of the Invention

[0013] According to the present invention, the controller can be mounted without obstructing the field of vision of the operator on board, and the time required for maintenance of the controller can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side view of a hydraulic excavator.

[0015] Figure 2 This is a three-dimensional view of the cab.

[0016] Figure 3 It is a side sectional view of the cab.

[0017] Figure 4 It is a side sectional view near the ceiling of the cab.

[0018] Figure 5 This is a bottom view of the ceiling.

[0019] Figure 6 This is a bottom view of the ceiling with the left cover removed.

[0020] Figure 7 This is a bottom view of the ceiling with the left cover and the right cover removed.

[0021] Figure 8 This is a bottom view of the ceiling with the left cover, the right cover, and the rear cover removed.

[0022] Fig. 9 This is a bottom view of the ceiling with the connector cover removed. DETAILED DESCRIPTION

[0023] Hereinafter, the embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, the same symbols are marked on the same elements, and repeated descriptions are appropriately omitted. In this embodiment, a hydraulic excavator is used as an example of the construction machinery of the present invention, but the present invention can also be applied to other construction machinery such as dump trucks, bulldozers, and wheel loaders.

[0024] Figure 1 is a side view of a hydraulic excavator. Figure 1 In the embodiment, the hydraulic excavator 100 includes a crawler-type lower traveling body 1, an upper revolving body 2 rotatably provided on the lower traveling body 1, and a front working machine 3 rotatably provided in front of the upper revolving body 2 in the up-down direction. The lower traveling body 1, the upper revolving body 2, and the front working machine 3 (working device) constitute the vehicle body of the hydraulic excavator 100.

[0025] The front working machine 3 is composed of a plurality of driven parts (a boom 3a, an arm 3b, and a bucket 3c) connected to each other in the vertical direction. The base end of the boom 3a is rotatably supported at the front of the upper slewing body 2. One end of the arm 3b is rotatably connected to the front end of the boom 3a, and the bucket 3c is rotatably connected to the other end (front end) of the arm 3b. The boom 3a, the arm 3b, and the bucket 3c are driven by a boom cylinder 3d, an arm cylinder 3e, and a bucket cylinder 3f, which are hydraulic actuators, respectively.

[0026] The upper revolving body 2 is constructed by arranging various components on a revolving frame 2a serving as a base, and the revolving frame 2a is driven to rotate relative to the lower traveling body 1 by a revolving hydraulic motor 5 serving as a hydraulic actuator, thereby causing the upper revolving body 2 to rotate relative to the lower traveling body 1. A cab 4 for an operator to ride in and operate the hydraulic excavator 100 is arranged at the front of the upper revolving body 2. The upper revolving body 2 is also equipped with an engine serving as a prime mover, a hydraulic pump and a pilot pump driven by the engine, and a control valve for controlling the flow (direction and flow rate) of the working oil supplied from the hydraulic pump to each hydraulic actuator (the boom cylinder 3d, the arm cylinder 3e, the bucket cylinder 3f, the revolving hydraulic motor 5, etc.).

[0027] An antenna 6a is installed at the upper rear of the cab 4. The antenna 6a receives radio waves (operation signals) transmitted from a transmitter (not shown) of a remote wireless operating device. The hydraulic excavator 100 in this embodiment is a riding type and remotely operated type, and can be operated by a remote operator in addition to the operator riding in the cab 4 (riding operator).

[0028] Figure 2 4 is a perspective view of the interior of the cab 4. The cab 4 has a front surface portion 41 (shown in FIG. Figure 3 ), a rear surface portion 42, a left side surface portion 43, a right side surface portion 44, a ceiling 7 as an upper surface portion, and a bottom surface portion 45. A boarding and alighting port is formed on the left side surface portion 43 of the cab 4, and a door 43a (shown in FIG. 1 ) that can be opened and closed is provided at the boarding and alighting port. Figure 1). Glass is attached to a portion of the front surface 41, the rear surface 42, the left side surface 43 and the right side surface 44 so that the operator on board can recognize the conditions around the vehicle body. The cab 4 is provided with a seat 4a for the operator on board, operating levers 4b to 4e for driving the front working machine 3, rotating the upper rotating body 2, and traveling the lower traveling body 1. A remote communication receiver 6b is installed on the left side of the cab 4. The remote communication receiver 6b sends the operation signal received by the antenna 6a to the first controller 10 described later. The antenna 6a and the remote communication receiver 6b constitute a remote communication device 6. The front portion of the ceiling 7 of the cab 4 constitutes a skylight 7a that can be opened and closed. The portion of the ceiling 7 that is farther rearward than the skylight 7a is covered by a ceiling cover 8.

[0029] Figure 3 : is a side cross-sectional view of the cab 4. A first controller 10 and a second controller 11 are arranged in the ceiling space 9 formed between the ceiling 7 and the ceiling cover 8. The controllers 10 and 11 in this embodiment have the function of enabling remote operation or automatic driving of the hydraulic excavator 100. The first controller 10 determines the action of the vehicle body based on the information obtained from the remote communication device 6 and various sensors connected for function expansion. The second controller 11 generates a signal (action instruction) for causing the vehicle body to execute the action of the vehicle body determined by the first controller 10, and outputs it to each mounted component of the vehicle body (hydraulic pump, solenoid valve, monitor). In addition, the second controller 11 can also output the action instruction via a controller (not shown) mounted on an existing standard machine instead of directly outputting the action instruction to each mounted component. The controllers 10 and 11 are located at the rear of the cab 4 away from the skylight 7a, so as not to hinder the opening and closing of the skylight 7a. In addition, even if it rains when the skylight 7a is open, the controllers 10 and 11 will not be exposed to rainwater.

[0030] Figure 4 It is a side cross-sectional view of the vicinity of the ceiling 7 of the cab 4. The ceiling cover 8 covering the rear portion of the ceiling 7 includes a front cover 8a covering the rear portion of the skylight 7a, a left cover 8b covering the rear left portion of the front cover 8a, a right cover 8c covering the rear right portion of the front cover 8a, a rear cover 8d covering the rear portions of the left cover 8b and the right cover 8c, and a connector cover 8e blocking an opening 8d1 of the rear cover 8d.

[0031] Seats 7b, 7c, and 7d are welded to the lower surface of the ceiling 7. The front cover 8a is mounted on the seat 7b. Brackets 12a and 12b are mounted on the seats 7c and 7d. A pedestal 13 is mounted on the brackets 12a and 12b, and controllers 10 and 11 are mounted on the pedestal 13. A heat-insulating polyurethane member 14 is mounted between the seat 7c and the seat 7d of the ceiling 7 to protect the controllers 10 and 11 from the heat of sunlight. Covers 8b and 8c are mounted on the brackets 12a and 12b.

[0032] The controllers 10 and 11 are connected to the antenna 6a and the remote communication receiver 6b via the harness 15. By arranging the controllers 10 and 11 in the ceiling space 9 located near the antenna 6a and the remote communication receiver 6b, the harness 15 can be shortened. As a result, the influence of interference noise and the risk of disconnection can be reduced. The harness 15 has a connector 16 for connecting the expansion device to the controllers 10 and 11. As the expansion device, there can be cited an input device for the purpose of obtaining operation information, vehicle information or surrounding information, and an output device for the purpose of ensuring a transmission suitable for the vehicle condition or an unmanned driving environment. As a specific example of the input device, there is a communication device (receiver) and a sensor (camera (camera), LiDER, etc.). As a specific example of the output device, there is an LED (work light, warning light), a display device and a driver (servo motor, solenoid valve). The driver adjusts the orientation of the sensor and LED, or adjusts the direction of the camera according to the instruction of the remote operator. The rear cover 8d has an opening 8d1 that exposes the connector 16 in the cab 4. The connector cover 8e is attached to the rear cover 8d so as to close the opening 8d1. The covers 8a to 8e have a structure in which they are fixed by a simple mechanism such as a claw, a pin, or a bolt, and can be easily removed manually.

[0033] Figure 5 It is a top view of the ceiling 7. The left cover 8b has an outer shape corresponding to the size of the shell of the first controller 10, and the right cover 8c has an outer shape corresponding to the size of the shell of the second controller 11. When only one of the controllers is replaced or maintained (software rewriting, etc.), only the corresponding cover needs to be removed. The software of the controllers 10 and 11 is rewritten by connecting a dedicated cable to the controllers 10 and 11 exposed in the cab 4. As a result, the controllers 10 and 11 can be replaced and maintained in a short time. The left cover 8b has an opening 8b1 that exposes the reset button 10a of the first controller 10 in the cab 4. As a result, the first controller 10 can be restarted without removing the left cover 8b. The rear cover 8d has openings 8d2 and 8d3 that expose the speakers 17a and 17b installed near the rear end of the ceiling 7 in the cab 4.

[0034] As the scenarios where the first controller 10 needs to be restarted, the following situations can be cited: (1) the software of the first controller 10 is changed (rewritten); (2) an expansion device is newly added (for the first controller 10 to recognize the input status from the expansion device and process it correctly); and (3) an abnormality is recognized in the behavior of the first controller 10 (for the first controller 10 to recover from an error state). In particular, in the case of (3) above, it is not necessary to remove the left cover 8b, so the advantage of pressing the reset button 10a through the opening 8b1 is great. On the other hand, in the case of (1) or (2) above, if the operation is performed with the left cover 8b removed, but the left cover 8b is installed after the operation is performed without forgetting to press the reset button 10a, the reset button 10a can be pressed without removing the left cover 8b again, so the increase in maintenance man-hours can be suppressed.

[0035] The reset button 10a is arranged at a position rearward of an imaginary line extending vertically upward from the headrest in the posture of the backrest of the seat 4a adjusted when the operator operates the vehicle body, and at a position forward of the speakers 17a and 17b in the vehicle body front-rear direction, and offset toward the cab door side (left side in this embodiment) from the center of the width direction dimension in the cab 4. Thus, it is possible to prevent the reset button 10a from being erroneously operated due to contact with the operator's head when getting on or off the vehicle, and to improve the operability of the reset button 10a compared to a case where the reset button 10a is arranged at the back right rear side in the cab 4.

[0036] Figure 6 Remove the left cover 8b (shown in Figure 5 ) is a bottom view of the ceiling 7 in the state after the left cover 8b is removed. By removing only the left cover 8b, the first controller 10 can be exposed in the cab 4. As a result, the first controller 10 can be replaced or maintained in a short time. In addition, when the left cover 8b is removed to replace or maintain the first controller 10, the second cover 8c can also be used to protect the second controller 11.

[0037] Figure 7 Remove the left cover 8b and the right cover 8c (shown in Figure 5 ) is a bottom view of the ceiling 7 in the state after the right cover 8c is removed. By removing the right cover 8c, the second controller 11 can be exposed in the cab 4. In this way, the second controller 11 can be replaced and maintained. In addition, Figure 5 As shown, the left end of the right cover 8c is covered by the right end of the left cover 8b, so the right cover 8c cannot be removed without removing the left cover 8b. Thus, it is possible to avoid mistakenly removing the second controller 11 with a low maintenance frequency.

[0038] Figure 8 Remove the left cover 8b, right cover 8c and rear cover 8d (shown in FIG. Figure 5) is a bottom view of the ceiling 7 in the state after the first controller 10 and the second controller 11 are connected to the antenna 6a and the remote communication receiver 6b via the wiring harness 15. The wiring harness 15 has a connector 16 for connecting an expansion device to the first controller 10 or the second controller 11.

[0039] Fig. 9 The connector cover 8e (shown in Figure 5 ) is a bottom view of the ceiling 7 in the state after the ceiling cover 8 is opened. By removing the connector cover 8e from the rear cover 8d of the ceiling cover 8, the connector 16 can be exposed in the cab 4. Thus, the expansion device can be easily connected to the first controller 10 or the second controller 11.

[0040] (Summarize)

[0041] In the present embodiment, the hydraulic excavator 100 comprises: a vehicle body 1 to 3 having a working device 3; a cab 4 arranged on the vehicle body 1 to 3; an operating device arranged in the cab 4 and used to operate the working device 3; a ceiling cover 8 covering at least a portion of the ceiling in the cab 4 from the bottom; and a first controller 10 that controls the working device 3 during remote operation or automatic driving, wherein the first controller 10 has a reset button 10a for restarting, and the reset button 10a is arranged between the ceiling 7 and the ceiling cover 8 facing downward, the ceiling cover 8 is installed in a position covering the first controller 10 from the bottom, and has an opening 8b1 that exposes the reset button 10a in the cab 4.

[0042] According to the present embodiment constructed as described above, the first controller 10 is arranged between the ceiling 7 and the ceiling cover 8 in the cab 4, so the first controller 10 can be carried without obstructing the field of vision of the operator. In addition, by pressing the reset button 10a of the first controller 10 exposed from the opening 8b1 of the ceiling cover 8 in the cab 4, the first controller 10 can be restarted without removing the ceiling cover 8. In addition, by removing only the first cover 8b, the first controller 10 can be exposed in the cab 4, so the first controller 10 can be replaced and maintained in a short time. In addition, by providing the opening 8b1 on the lower side of the first controller 10, even when the opening 8b1 is kept open, rainwater, beverages, water used for cleaning, etc. can be prevented from falling on the first controller 10. In addition, the cumbersome operation of disassembling and installing the ceiling cover 8 and opening and closing the opening 8b1 can be reduced, so the maintenance workability is improved. In addition, the opening 8b1 is local, so the first controller 10 and the head of the operator can be protected by the first cover 8b.

[0043] In addition, the hydraulic excavator 100 of the present embodiment further includes a second controller 11, which is connected to the first controller 10 and outputs a command to the components mounted on the vehicle bodies 1 to 3 based on the signal input from the first controller 10. The second controller 11 is arranged between the ceiling 7 and the ceiling cover 8, and the ceiling cover 8 is composed of a plurality of covers 8a to 8e that can be separated and removed. The first cover 8b of the plurality of covers 8a to 8e has an opening 8b1 and is installed at a position that covers the first controller 10 from the bottom and does not overlap with the second controller 11 in the vertical direction. The second cover 8c of the plurality of covers 8a to 8e is installed at a position that covers the second controller 11 from the bottom. Therefore, when the first cover 8b is removed to replace or maintain the first controller 10, the second cover 8c can also be used to protect the second controller 11.

[0044] In addition, the hydraulic excavator 100 of the present embodiment is provided with a harness 15 connected to the first controller 10, the first controller 10 is configured to be able to change the functions of the vehicle bodies 1 to 3, the harness 15 has a connector 16 for connecting an expansion device to the first controller 10, and the third cover 8e among the plurality of covers 8a to 8e is installed at a position covering the connector 16 from the bottom. Thus, the expansion device can be connected to the first controller 10 by removing only the third cover 8e.

[0045] In addition, a portion of the front of the ceiling 7 of the present embodiment is a skylight 7a that can be opened and closed, and the first cover 8b is arranged behind the skylight 7a. Thus, the first controller 10 and the second controller 11 can be mounted without hindering the opening and closing of the skylight 7a. Furthermore, even if it rains when the skylight 7a is open, the first controller 10 and the second controller 11 will not be exposed to the rain, so the failure of the first controller 10 and the second controller 11 can be prevented.

[0046] The embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments and includes various modifications. For example, the above embodiments are examples described in detail to easily explain the present invention, and the present invention is not limited to all the structures described.

[0047] Explanation of symbols

[0048] 1—lower traveling body (vehicle body), 2—upper rotating body (vehicle body), 2a—rotating frame, 3—front working machine (working device, vehicle body), 3a—boom, 3b—arm, 3c—bucket, 3d—boom cylinder, 3e—arm cylinder, 3f—bucket cylinder, 4—operating cab, 4a—seat, 4b, 4c, 4d, 4e—operating lever, 5—rotating hydraulic motor, 6—remote communication device, 6a—antenna, 6b—remote communication receiver, 7—roof, 7a—skylight, 7b, 7c, 7d—seat, 8—ceiling cover, 8a—front cover, 8b—left cover (first cover), 8b1—opening, 8c—right cover (second cover), 8d—rear cover, 8d1, 8d2, 8d3—openings, 8e—connector cover (third cover), 9—ceiling space, 10—first controller, 10a—reset button, 11—second controller, 12a, 12b—bracket, 13—pedestal, 14—thermal insulation polyurethane part, 15—wiring harness, 16—connector, 17a, 17b—speakers, 100—hydraulic excavator.

Claims

1. A construction machine comprising: a vehicle body having a working device; A cab, which is arranged on the vehicle body; An operating device, which is disposed in the cab and is used to operate the working device; a roof cover covering at least a portion of a roof in the cab from a lower side; as well as a first controller for controlling the working device during remote operation or automatic driving, The construction machinery is characterized in that The first controller has a reset button for restarting, and the reset button is arranged between the ceiling and the ceiling cover so as to face downward. The ceiling cover is installed at a position covering the first controller from below, and has an opening for exposing the reset button in the cab.

2. The construction machinery according to claim 1, characterized in that: further comprising a second controller connected to the first controller and outputting a command to a component mounted on the vehicle body based on a signal input from the first controller, The second controller is arranged between the ceiling and the ceiling cover. The roof cover is composed of a plurality of covers that can be separated and removed. The first cover of the plurality of covers has the opening and is installed at a position covering the first controller from below and not overlapping with the second controller in the vertical direction. A second cover among the plurality of covers is installed at a position covering the second controller from a lower side.

3. The construction machinery according to claim 2, characterized in that: having a wiring harness connected to the first controller, The first controller is configured to be able to change the function of the vehicle body, The wiring harness has a connector for connecting an expansion device to the first controller, A third cover among the plurality of covers is installed at a position covering the connector from a lower side.

4. The construction machinery according to claim 1, characterized in that: The front part of the ceiling is a skylight that can be opened and closed. The ceiling cover is arranged rearward of the skylight.

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