Cable take-up and pay-off device for opencast coal mine

Abstract

The cable take-up and pay-off device for the open-pit coal mine comprises a walking part, the walking part comprises a vehicle frame and a chassis, the vehicle frame is provided with a crawler belt and a walking motor, the chassis is arranged at the top of the vehicle frame, and the chassis is provided with a mounting hole penetrating through the chassis in the vertical direction; the first winding drum comprises a first rack, a first roller and a first driver, the first rack is arranged on the chassis, the first roller is rotatably arranged on the first rack, the first driver can drive the first roller to rotate so as to take up and pay off the cable, and the rotating axial direction of the first roller is the second direction; at least part of the first roller is located in the mounting hole and located below the chassis; and the machine room is arranged on the chassis, the machine room and the first winding drum are arranged in a spaced mode in the first direction, and control equipment is arranged in the machine room. Therefore, the cable take-up and pay-off device for the open pit coal mine has the advantages of being stable in running and high in safety.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to a cable retracting and releasing device for an open-pit coal mine. Background Art

[0002] The electric shovels of large-scale mining and loading equipment in open-pit coal mines are driven by electricity and connected to the transformer box through multiple cables connected in sequence. The cables are thick, long and very heavy, and the efficiency of manual handling is low. As the working face advances, the position of the electric shovel must be constantly changed, while the position of the transformer box remains unchanged, so it is necessary to continuously add or reduce cables. The tail cable is the cable with the highest frequency of movement. In related technologies, the tail cable can be retracted and released by an open-pit coal mine cable reel vehicle. However, when working outdoors, harsh environments such as rainy and snowy weather and falling rocks on the ground may pose safety hazards to the electrical equipment on the cable reel vehicle. For example, when the cable is damaged and leaks electricity, it poses a great challenge to the personal safety of the staff. In addition, there is a lot of gravel in the working environment of the cable reel vehicle, making it difficult for the cable reel vehicle to operate safely and stably. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an open-pit coal mine cable retracting and releasing device.

[0005] The open-pit coal mine cable retracting and releasing device according to an embodiment of the present invention comprises:

[0006] A walking part, wherein the walking part comprises a frame and a chassis, the frame is provided with a crawler and a walking motor, the walking motor can drive the crawler to move, the thickness direction of the chassis is the up-down direction, the chassis is arranged on the top of the frame, the chassis has a mounting hole penetrating therethrough in the up-down direction, the length direction of the chassis is the first direction, the width direction of the chassis is the second direction, and any two of the first direction, the second direction and the up-down direction are perpendicular to each other;

[0007] a first reel, the first reel comprising a first frame, a first roller and a first driver, the first frame being arranged on the chassis, the first roller being rotatably arranged on the first frame, the first driver being capable of driving the first roller to rotate so as to retract and release the cable, the rotation axis of the first roller being the second direction, at least a portion of the first roller being located in the mounting hole and below the chassis;

[0008] A machine room, wherein the machine room is arranged on the chassis, the machine room is spaced apart from the first reel in the first direction, and a control device is arranged in the machine room.

[0009] Therefore, the open-pit coal mine cable retracting and releasing device according to the embodiment of the present invention has the advantages of stable driving and high safety.

[0010] In some embodiments, a protective shed is provided on the chassis, and the machine room and the first reel are located in the protective shed.

[0011] In some embodiments, the protective shed includes a main ceiling, a sloping ceiling and a first shed support, the main ceiling is erected on the top of the machine room at one end adjacent to the machine room in the first direction, the first shed support is arranged at the end of the chassis in the first direction, the first reel is located between the first shed support and the machine room in the first direction, the main ceiling, the sloping ceiling and the first shed support are connected in sequence in the first direction, and the sloping ceiling is arranged to be tilted downward in the first direction along a direction adjacent to the first shed support.

[0012] In some embodiments, a second reel is provided on the chassis, and the second reel, the machine room, and the first reel are arranged in sequence in the first direction, and the maximum cable length that the second reel can accommodate is smaller than the maximum cable length that the first reel can accommodate.

[0013] In some embodiments, the first shelf support is provided with a first automatic cable arranging device cooperating with the first reel;

[0014] A wire arranging rack is arranged on the chassis, and a second automatic wire arranging device cooperating with the second reel is arranged on the wire arranging rack.

[0015] In some embodiments, a clamping device is provided on the chassis, and the clamping device is located between the machine room and the first reel in the first direction. The clamping device includes a clamping roller, and the axial direction of the clamping roller is the second direction. The clamping roller is located on top of the first roller and is used to limit the cable.

[0016] In some embodiments, the clamping device includes a first clamping frame, a second clamping frame, a third clamping frame and a clamping adjustment member, the bottom of the first clamping frame is arranged on the chassis, the two ends of the second clamping frame in the length direction are respectively hinged to the top of the first clamping frame and the third clamping frame, the rotation axis of the second clamping frame is the second direction, the clamping adjustment member can adjust the angle between the second clamping frame and the first clamping frame, the clamping roller is arranged at the first end of the third clamping frame in the length direction, the bottom of the second end of the third clamping frame in the length direction is provided with an elastic member, and the bottom of the elastic member is connected to the second clamping frame.

[0017] According to an embodiment of the present invention, the open-pit coal mine cable retracting and releasing device includes a wired operating handle and a remote control device. The wired operating handle can be placed in the machine room. Both the wired operating handle and the remote control device can be used to control the walking part, the first drum and the second drum.

[0018] In some embodiments, the protective shed is provided with lighting lamps at both ends in the first direction;

[0019] The size of the machine room in the second direction is consistent with the size of the chassis in the second direction;

[0020] The machine room is provided with doors on both sides in the first direction, and the machine room is provided with a pull rod and an emergency stop switch on at least one side in the second direction.

[0021] In some embodiments, a fence and a ladder are provided on the chassis;

[0022] The vehicle frame comprises two track frames and a plurality of connecting frames, the two track frames are connected by the plurality of connecting frames, the plurality of connecting frames are arranged at intervals in the first direction, and the mounting hole is located between the two connecting frames in the first direction;

[0023] The travel motor is arranged on the crawler frame, and the crawler frame is provided with a protection plate located at the bottom of the travel motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of an open-pit coal mine cable retracting and releasing device according to an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of an open-pit coal mine cable retracting and releasing device according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of a clamping device according to an embodiment of the present invention.

[0027] Figure 4 2 is a schematic diagram of a vehicle frame according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Frame, 11. Track, 12. Travel motor, 13. Track frame, 14. Connecting frame, 15. Protection plate;

[0030] 2. chassis, 21. mounting holes;

[0031] 3. first reel, 31. first frame, 32. first roller, 33. first driver, 331. first driver, 34. first automatic cable arranging device;

[0032] 4. Computer room;

[0033] 5. Protective shed, 51. Main roof, 52. Sloping roof, 53. First shed support;

[0034] 6. second reel, 61. second automatic cable arranging device;

[0035] 71. Compression roller, 72. First compression frame, 73. Second compression frame, 74. Third compression frame, 75. Compression adjustment member. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] The following describes the open-pit coal mine cable retracting and releasing device according to an embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 4 As shown, the open-pit coal mine cable retracting and releasing device according to an embodiment of the present invention includes a walking part, a first drum 3 and a machine room 4.

[0038] The walking part includes a frame 1 and a chassis 2. The frame 1 is provided with a crawler 11 and a walking motor 12. The walking motor 12 can drive the crawler 11 to move. The thickness direction of the chassis 2 is the up-down direction. The chassis 2 is arranged on the top of the frame 1. The chassis 2 has a mounting hole 21 that penetrates it in the up-down direction. The length direction of the chassis 2 is the first direction, and the width direction of the chassis 2 is the second direction. Any two of the first direction, the second direction and the up-down direction are perpendicular to each other. The first direction can be the front-to-back direction, and the second direction can be the left-to-right direction. For example, the length direction of the chassis 2 is the front-to-back direction, and the width direction of the chassis 2 is the left-to-right direction.

[0039] In some embodiments, a fence and a ladder are provided on the chassis 2 . A fence is provided on the surrounding side of the chassis 2 to protect the workers, and the ladder is provided to facilitate the workers to climb onto the chassis 2 .

[0040] like Figure 4 As shown, in some embodiments, the frame 1 includes two track frames 13 and a plurality of connecting frames 14, the two track frames 13 are connected by the plurality of connecting frames 14, the plurality of connecting frames 14 are arranged at intervals in the first direction, and the mounting hole 21 is located between the two connecting frames 14 in the first direction. The travel motor 12 drives the track 11 through the travel reducer and the driving wheel to realize the travel function. For example, three connecting frames 14 are arranged at intervals in the front-to-back direction, and the mounting hole 21 is located between the two connecting frames 14 in the front-to-back direction.

[0041] In some embodiments, the travel motor 12 is disposed on a track frame 13 , and a protection plate 15 is disposed on the track frame 13 at the bottom of the travel motor 12 , and the protection plate 15 can prevent gravel from damaging the travel motor 12 .

[0042] The first reel 3 includes a first frame 31, a first roller 32 and a first driver 33. The first frame 31 is disposed on the chassis 2, the first roller 32 is rotatably disposed on the first frame 31, and the first driver 33 can drive the first roller 32 to rotate so as to retract and release the cable, and the rotation axis of the first roller 32 is the second direction. For example, the rotation axis of the first roller 32 is the left-right direction, and the first driver 33 is connected to the first roller 32 through a reducer 331.

[0043] At least part of the first roller 32 is located in the mounting hole 21 and below the chassis 2. Specifically, the mounting hole 21 provides a space for the first roller 32 to avoid the first roller 32, so that the first roller 32 can be placed in the mounting hole 21, thereby lowering the center of gravity of the first roller 32, and further lowering the center of gravity of the open-pit coal mine cable retracting device. In this way, when encountering gravel, the open-pit coal mine cable retracting device can operate safely and stably.

[0044] The machine room 4 is arranged on the chassis 2, and the machine room 4 is spaced apart from the first reel 3 in the first direction, and the machine room 4 is provided with control equipment. Specifically, the machine room 4 is divided into a high-voltage room, a low-voltage room and a brake resistor room, wherein the high-voltage room is provided with a transformer and a high-voltage switch cabinet, and independent transformer inspection doors and high-voltage switch cabinet operation doors are provided at relative positions; the low-voltage room is provided with a PLC controller, a liquid crystal touch screen, a frequency converter, a low-voltage switch and a relay, etc., and an independent door is provided, and the inner wall and ceiling of the low-voltage room are provided with an insulation board, and an air conditioner with an auxiliary heating function is installed. In the high temperature of summer, the refrigeration ensures that the temperature in the low-voltage room is lower than 30°, and in the low temperature of winter, the auxiliary heating function is activated to ensure that the temperature in the low-voltage room is higher than 10°, and the normal operation of the electrical control components is ensured. The brake resistor is installed in the brake resistor room, and a fan is installed for ventilation and heat dissipation.

[0045] In some embodiments, the size of the machine room 4 in the second direction is consistent with the size of the chassis 2 in the second direction. The machine room 4 is provided with doors on both sides in the first direction, and the machine room 4 is provided with a pull rod and an emergency stop switch on at least one side in the second direction, so that the staff can shut down the open-pit coal mine cable retracting and releasing device in time. For example, when there is a fault or problem such as phase loss, overload, short circuit, grounding, etc. on the transformer side, the emergency stop switch can be activated in time to cut off the power supply of the transformer to avoid over-tripping.

[0046] like Figure 1 and Figure 2As shown, in some embodiments, a protective shed 5 is provided on the chassis 2, and the machine room 4 and the first reel 3 are located in the protective shed 5. Specifically, the protective shed 5 includes a main ceiling 51, a sloping ceiling 52, and a first shed bracket 53. The main ceiling 51 is set on the top of the machine room 4 at one end adjacent to the machine room 4 in the first direction, the first shed bracket 53 is set at (one) end of the chassis 2 in the first direction, the first reel 3 is located between the first shed bracket 53 and the machine room 4 in the first direction, the main ceiling 51, the sloping ceiling 52 and the first shed bracket 53 are connected in sequence in the first direction, and the sloping ceiling 52 is set downwardly in the direction adjacent to the first shed bracket 53 in the first direction. Therefore, in rainy and snowy weather, the protective shed 5 can protect the cables on the machine room 4 and the first reel 3. It can also prevent the cables on the first reel 3 and the electrical equipment in the machine room 4 from being buried in safety hazards due to harsh environments such as falling rocks. For example, the front end of the main ceiling 51 is erected on the top of the machine room 4, the first ceiling support 53 is arranged at the rear end of the chassis 2, the main ceiling 51, the inclined ceiling 52 and the first ceiling support 53 are connected in sequence from front to back, and the inclined ceiling 52 is arranged to be tilted backward and downward.

[0047] In some embodiments, a second reel 6 is provided on the chassis 2, and the second reel 6, the machine room 4, and the first reel 3 are arranged in sequence in the first direction, and the maximum cable length value that the second reel 6 can accommodate is less than the maximum cable length value that the first reel 3 can accommodate. Specifically, the first reel 3 is a main reel and is arranged at the rear end of the chassis 2, and the second reel 6 is an auxiliary reel and is arranged at the front end of the chassis 2. The first reel 3 and the second reel 6 can cooperate with each other to provide more cables. For example, the second reel 6, the machine room 4, and the first reel 3 are arranged in sequence from front to back. The first reel 3 can accommodate cables with a length of more than 500m, and the second reel 6 can accommodate cables with a length of more than 100m. When the frame 1 moves forward, the tension of the front reel (the second reel 6) decreases, the holding torque of the reel motor is greater than the torque of the cable tension on the reel, and the front reel (the second reel 6) actively retracts the cable. When the frame 1 moves forward, the cable tension of the rear drum (first drum 3) increases. When the holding torque of the drum motor is less than the torque of the cable tension on the drum, the rear drum (first drum 3) is pulled by the cable to rotate, and the rear drum (first drum 3) passively releases the cable. When the cable car moves backward, the opposite is true. Similarly, when the electric shovel moves forward, the cable tension increases, and the front drum (second drum 6) passively releases the cable. When the electric shovel moves backward, the cable tension decreases, and the front drum (second drum 6) actively reels the cable.

[0048] In some embodiments, the first scaffolding support 53 is provided with a first automatic cable arranging device 34 cooperating with the first reel 3; the chassis 2 is provided with a cable arranging frame, and the cable arranging frame is provided with a second automatic cable arranging device 61 cooperating with the second reel 6. The first automatic cable arranging device 34 and the second automatic cable arranging device 61 can make the cable reels neatly arranged, and realize synchronous retraction and release with the shovel. For example, the first automatic cable arranging device 34 and the second automatic cable arranging device 61 are composed of components such as a column, a servo motor, a reducer, a screw, a guide rod, a cable arranging device, a sensor, a PLC controller, etc., which can realize automatic cable discharge.

[0049] like Figure 3 As shown, in some embodiments, a clamping device 7 is provided on the chassis 2, and the clamping device 7 is located between the machine room 4 and the first reel 3 in the first direction. The clamping device 7 includes a clamping roller 71, and the axial direction of the clamping roller 71 is the second direction. The clamping roller 71 is located on the top of the first roller 32 and is used to limit the position of the cable. Therefore, when the first roller 32 retracts and releases the cable, the clamping roller 71 limits the position of the cable, so that the cable wound on the first roller 32 is not easily confused.

[0050] In some embodiments, the clamping device 7 includes a first clamping frame 72, a second clamping frame 73, a third clamping frame 74 and a clamping adjustment member 75. The bottom of the first clamping frame 72 is arranged on the chassis 2, and the length direction of the first clamping frame 72 is the up-down direction. The two ends of the second clamping frame 73 in the length direction are respectively hinged to the top of the first clamping frame 72 and the third clamping frame 74, and the rotation axis of the second clamping frame 73 is the second direction. The clamping adjustment member 75 can adjust the angle between the second clamping frame 73 and the first clamping frame 72, and the clamping roller 71 is (rotatably) arranged at the first end of the length direction of the third clamping frame 74, and an elastic member is arranged at the bottom of the second end of the length direction of the third clamping frame 74, and the bottom of the elastic member is connected to the second clamping frame 73. For example, the clamping adjustment member 75 is a telescopic rod, the fixed portion and the telescopic portion of the telescopic rod are respectively hinged to the second clamping frame 73 and the first clamping frame 72, and after the telescopic portion of the telescopic rod is extended and retracted, the angle between the second clamping frame 73 and the first clamping frame 72 can be adjusted. The elastic member is a spring, and a spring is provided between the bottom of the second end of the third clamping frame 74 in the length direction and the second clamping frame 73.

[0051] In some embodiments, the open-pit coal mine cable retracting and releasing device includes a wired operating handle and a remote control device. The wired operating handle can be placed in the machine room 4, and both the wired operating handle and the remote control device can be used to control the walking part, the first drum 3 and the second drum 6. Specifically, the vehicle operation mode is divided into remote control and manual control, and the remote control device can be controlled and operated by a remote controller on the electric shovel or on the ground. The wired operating handle is set on the cable retracting and releasing device control platform.

[0052] In some embodiments, lighting lamps are provided at both ends of the protection shed 5 in the first direction so as to provide lighting during operation.

[0053] Therefore, the open-pit coal mine cable retracting and releasing device according to the embodiment of the present invention has the advantages of stable driving and high safety.

[0054] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cable retracting and releasing device for an open-pit coal mine, characterized in that: include: A walking part, wherein the walking part comprises a frame and a chassis, the frame is provided with a crawler and a walking motor, the walking motor can drive the crawler to move, the thickness direction of the chassis is the up-down direction, the chassis is arranged on the top of the frame, the chassis has a mounting hole penetrating therethrough in the up-down direction, the length direction of the chassis is the first direction, the width direction of the chassis is the second direction, and any two of the first direction, the second direction and the up-down direction are perpendicular to each other; a first reel, the first reel comprising a first frame, a first roller and a first driver, the first frame being arranged on the chassis, the first roller being rotatably arranged on the first frame, the first driver being capable of driving the first roller to rotate so as to retract and release the cable, the rotation axis of the first roller being the second direction, at least a portion of the first roller being located in the mounting hole and below the chassis; A machine room, wherein the machine room is arranged on the chassis, the machine room is spaced apart from the first reel in the first direction, and a control device is arranged in the machine room.

2. The open-pit coal mine cable retracting and releasing device according to claim 1, characterized in that: A protective shed is provided on the chassis, and the machine room and the first reel are located in the protective shed.

3. The open-pit coal mine cable retracting and releasing device according to claim 2, characterized in that: The protective shed includes a main ceiling, a sloping ceiling and a first shed support. The main ceiling is erected on the top of the machine room at one end adjacent to the machine room in the first direction. The first shed support is arranged at the end of the chassis in the first direction. The first reel is located between the first shed support and the machine room in the first direction. The main ceiling, the sloping ceiling and the first shed support are connected in sequence in the first direction. The sloping ceiling is arranged to be tilted downward in the first direction along a direction adjacent to the first shed support.

4. The open-pit coal mine cable retracting and releasing device according to claim 3, characterized in that: A second reel is provided on the chassis, and the second reel, the machine room, and the first reel are sequentially spaced apart in the first direction, and the maximum cable length that can be accommodated by the second reel is smaller than the maximum cable length that can be accommodated by the first reel.

5. The open-pit coal mine cable retracting and releasing device according to claim 4, characterized in that: The first shelf support is provided with a first automatic cable arranging device cooperating with the first reel; A wire arranging rack is arranged on the chassis, and a second automatic wire arranging device cooperating with the second reel is arranged on the wire arranging rack.

6. The open-pit coal mine cable retracting and releasing device according to claim 3, characterized in that: A clamping device is provided on the chassis, and the clamping device is located between the machine room and the first reel in the first direction. The clamping device includes a clamping roller, and the axial direction of the clamping roller is the second direction. The clamping roller is located on top of the first roller and is used to limit the cable.

7. The open-pit coal mine cable retracting and releasing device according to claim 6, characterized in that: The clamping device includes a first clamping frame, a second clamping frame, a third clamping frame and a clamping adjustment member. The bottom of the first clamping frame is arranged on the chassis, and the two ends of the second clamping frame in the length direction are respectively hinged to the top of the first clamping frame and the third clamping frame. The rotation axis of the second clamping frame is the second direction. The clamping adjustment member can adjust the angle between the second clamping frame and the first clamping frame. The clamping roller is arranged at the first end of the third clamping frame in the length direction, and an elastic member is arranged at the bottom of the second end of the third clamping frame in the length direction, and the bottom of the elastic member is connected to the second clamping frame.

8. The open-pit coal mine cable retracting and releasing device according to claim 4, characterized in that: It comprises a wired operating handle and a remote control device, wherein the wired operating handle can be placed in the machine room, and both the wired operating handle and the remote control device can be used to control the walking part, the first reel and the second reel.

9. The open-pit coal mine cable retracting and releasing device according to claim 2, characterized in that: The protective shed is provided with lighting lamps at both ends in the first direction; The size of the machine room in the second direction is consistent with the size of the chassis in the second direction; The machine room is provided with doors on both sides in the first direction, and the machine room is provided with a pull rod and an emergency stop switch on at least one side in the second direction.

10. The open-pit coal mine cable retracting and releasing device according to any one of claims 1 to 9, characterized in that: The chassis is provided with a fence and a ladder; The vehicle frame comprises two track frames and a plurality of connecting frames, the two track frames are connected by the plurality of connecting frames, the plurality of connecting frames are arranged at intervals in the first direction, and the mounting hole is located between the two connecting frames in the first direction; The travel motor is arranged on the crawler frame, and the crawler frame is provided with a protection plate located at the bottom of the travel motor.

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