Four-arm rubber wheel anchor rod drill carriage for coal mine

By designing a four-arm rubber tire anchor drilling rig for coal mines and using an articulated rubber tire chassis and lifting assembly, the existing anchor drilling rig's difficulty in entering small spaces and insufficient movement flexibility in coal mine tunnels has been solved, and the problem has been achieved. The drilling rig can move flexibly in narrow tunnels and improve anchor protection efficiency.

CN222376397UActive Publication Date: 2025-01-21JIANGSU ZHONGGUI HEAVY IND CO LTD
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Patent Information

Application Number
CN202421869432.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-05
Publication Date
2025-01-21
Estimated Expiration
2034-08-05

AI Technical Summary

Technical Problem

Existing anchor drilling vehicles are difficult to enter tunnels with smaller spaces during coal mine tunnel construction, and their mobility is insufficient, which affects the anchor protection efficiency.

Method used

A four-arm rubber tire anchor drilling rig for coal mines is designed. It adopts an articulated rubber tire chassis, lifting assembly and anchor protection platform. The anchor protection platform is raised and lowered through the lifting assembly, and the horizontal included angle of the anchor protection platform is adjusted to ensure operation. The position is horizontal, making it easy to stand and do construction work.

Benefits of technology

This design enables the drilling rig to move flexibly and easily pass through narrow tunnels, and by lifting and adjusting the anchor protection platform, it can expand the operating range and improve the anchor protection efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model aims to disclose a four-arm rubber wheel anchor rod drill carriage for a coal mine, which relates to the technical field of coal mine tunnel construction and comprises a rubber wheel chassis, a lifting component and an anchor protection platform, the rubber wheel chassis comprises a front part and a rear part, and the front part is hinged to the rear part; the lifting assembly comprises a first group of lifting oil cylinders, a second group of lifting oil cylinders, a first connecting rod assembly and a second connecting rod assembly; the first group of lifting oil cylinders drive the first end of the anchor protection platform to lift by taking the front part as a fulcrum; the second group of lifting oil cylinders drive the second end of the anchor protection platform to lift by taking the front part as a fulcrum; the first row of anchor protection assembly is provided with two drill arms, the second row of anchor protection assembly is provided with two drill arms, and the rubber wheel chassis comprises the front portion and the rear portion which are connected in a hinged mode, so that walking is flexible, and turning is easy; the anchor rod driving operation range is expanded through the lifting assembly, the horizontal included angle of the anchor protection platform can be adjusted, and therefore it is guaranteed that the operation position is in the horizontal position, and standing is facilitated.
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Description

Technical Field

[0001] The utility model relates to the technical field of coal mine tunnel construction, in particular to a four-arm rubber wheel anchor drilling vehicle for coal mines. Background Art

[0002] Anchor drills are used for anchoring operations in coal mine tunnels to ensure the safety of the tunnels. In coal mine tunnels with small spaces, the current large anchor drills cannot enter for construction, and the anchor drills are not flexible enough to move, which affects the efficiency of anchoring. Summary of the invention

[0003] The utility model aims to disclose a four-arm rubber-wheeled anchor drilling vehicle for coal mines.

[0004] In order to achieve the above-mentioned invention object, the utility model provides a four-arm rubber-wheeled anchor drilling vehicle for coal mines, comprising a rubber-wheeled chassis, a lifting assembly and an anchor protection platform;

[0005] The rubber wheel chassis comprises a front part and a rear part, wherein the front part and the rear part are hinged;

[0006] The lifting assembly is disposed between the front portion and the anchoring platform;

[0007] The lifting assembly includes a first group of lifting cylinders, a second group of lifting cylinders, a first connecting rod assembly and a second connecting rod assembly;

[0008] The first group of lifting cylinders drives the first end of the anchor protection platform to rise and fall with the front portion as a fulcrum;

[0009] The second group of lifting cylinders drives the second end of the anchor protection platform to rise and fall with the front portion as a fulcrum;

[0010] The first connecting rod assembly is disposed between the first group of lifting cylinders;

[0011] The second connecting rod assembly is disposed between the second group of lifting cylinders;

[0012] The anchoring platform is provided with a first row of anchoring assemblies and a second row of anchoring assemblies, the first row of anchoring assemblies is provided with two drilling arms, and the second row of anchoring assemblies is provided with two drilling arms.

[0013] Preferably, the front portion is provided with front wheels, and the rear portion is provided with rear wheels.

[0014] Preferably, the first connecting rod assembly includes a first support plate and a second support plate which are hingedly connected, the first support plate is hingedly connected to the front portion, and the second support plate is hingedly connected to the first end of the anchor platform.

[0015] Preferably, the second connecting rod assembly comprises a triangular hinge seat, an L-shaped support plate, a third support plate and a fourth support plate mounted on the front portion;

[0016] One end of the L-shaped support plate is hinged to the third support plate, and the other end of the L-shaped support plate is hinged to the first end of the triangular hinge seat;

[0017] One end of the fourth support plate is hinged to the second end of the triangular hinge seat, and the other end of the fourth support plate is hinged to the third support plate;

[0018] The third support plate is hinged to the second end of the anchoring platform.

[0019] Preferably, the first group of lifting cylinders and the second group of lifting cylinders are independently controlled.

[0020] Preferably, the first row of anchoring assemblies comprises a first gantry bracket and a first anchor rod assembly and a second anchor rod assembly symmetrically arranged on both sides of the first gantry bracket;

[0021] The second row of anchor guard assemblies includes a second gantry bracket and a third anchor rod assembly and a fourth anchor rod assembly symmetrically arranged on both sides of the second gantry bracket.

[0022] Preferably, a first vertical slide rail, a first lifting cylinder, a second vertical slide rail and a second lifting cylinder are respectively arranged on both sides of the first gantry bracket;

[0023] The first anchor assembly includes a first slide, a first slewing assembly, a first L-shaped hinge plate, a first U-shaped mounting plate, a first swing cylinder and a first drill arm;

[0024] The first lifting cylinder drives the first slide table to move up and down along the first vertical slide rail with the first gantry bracket as a fulcrum;

[0025] The first rotary assembly is mounted on the first slide;

[0026] The first L-shaped hinge plate is hinged to the first U-shaped mounting plate, and the first rotating assembly drives the first L-shaped hinge plate to rotate;

[0027] The first drill arm is mounted on the first U-shaped mounting plate, and the first swing angle cylinder drives the first drill arm to swing forward and backward with the first L-shaped hinge plate as a fulcrum.

[0028] Preferably, a third vertical slide rail, a third lifting cylinder, a fourth vertical slide rail and a fourth lifting cylinder are respectively arranged on both sides of the second gantry bracket;

[0029] The third anchor assembly includes a second slide, a second slewing assembly, a second L-shaped hinge plate, a second U-shaped mounting plate, a second swing cylinder and a second drill arm;

[0030] The third lifting cylinder drives the second slide table to move up and down along the third vertical slide rail with the second gantry bracket as a fulcrum;

[0031] The second rotary assembly is mounted on the second slide;

[0032] The second L-shaped hinge plate is hinged to the second U-shaped mounting plate, and the second rotary assembly drives the second L-shaped hinge plate to rotate;

[0033] The second drill arm is mounted on the second U-shaped mounting plate, and the second swing angle cylinder drives the second drill arm to swing forward and backward with the second L-shaped hinge plate as a fulcrum.

[0034] Preferably, a first telescopic leg is provided in the middle of the first gantry support, and the telescopic direction of the first telescopic leg is toward the top of the tunnel;

[0035] A second telescopic leg is arranged in the middle of the second gantry support, and the telescopic direction of the second telescopic leg is toward the top of the tunnel.

[0036] Preferably, an explosion-proof diesel engine power system and an explosion-proof electric motor power system are arranged at the rear.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] The rubber-wheel chassis of the utility model includes a front part and a rear part which are hingedly connected, and the chassis is flexible to walk and easy to turn. In addition, a first row of anchor guard assemblies and a second row of anchor guard assemblies are designed, and the first row of anchor guard assemblies and the second row of anchor guard assemblies can be lifted and lowered by a lifting assembly, which, on the one hand, expands the operating range, and can also ensure that the working position is in a horizontal position by adjusting the horizontal angle of the anchor guard platform, so as to facilitate standing. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The utility model is a three-dimensional structural schematic diagram of a four-arm rubber-wheeled anchor drilling vehicle for coal mines.

[0040] Figure 2 The utility model is a three-dimensional structural schematic diagram of a four-arm rubber-wheeled anchor drilling vehicle for coal mines.

[0041] Figure 3 It is a three-dimensional structural schematic diagram of the first row of anchor guard components of the utility model.

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the second row anchor guard assembly of the utility model.

[0043] Figure 5 It is a three-dimensional structural schematic diagram of the coal lifting assembly of the utility model in a lifting state.

[0044] Among them, 1. rubber wheel chassis; 11. front; 12. rear; 13. front wheel; 14. rear wheel; 2. lifting assembly; 21. first group of lifting cylinders; 22. second group of lifting cylinders; 23. first connecting rod assembly; 231. first support plate; 232. second support plate; 24. second connecting rod assembly; 241. triangular hinge seat; 2411. first end of triangular hinge seat; 2412. second end of triangular hinge seat; 242. L-shaped support plate; 243. third support plate; 244. fourth support plate; 3. anchor guard platform; 31. first end of anchor guard platform; 32. second end of anchor guard platform; 33. first row of anchor guard assembly; 331. first gantry bracket; 332. first anchor rod assembly; 3321. first slide; 3322. first slewing assembly; 3323. first L-shaped hinge plate; 3324, the first U-shaped mounting plate; 3325, the first swing angle cylinder; 3326, the first drill arm; 333, the second anchor rod assembly; 334, the first vertical slide rail; 335, the first lifting cylinder; 336, the second vertical slide rail; 337, the second lifting cylinder; 34, the second row of anchor guard assemblies; 341, the second gantry bracket; 342, the third anchor rod assembly; 3421, the second slide; 3422, the second slewing assembly; 3423, the second L-shaped hinged plate; 3424, the second U-shaped mounting plate; 3425, the second swing angle cylinder; 3426, the second drill arm; 343, the fourth anchor rod assembly; 344, the third vertical slide rail; 345, the third lifting cylinder; 346, the fourth vertical slide rail; 347, the fourth lifting cylinder; 4, the first telescopic leg; 5, the second telescopic leg; 6, the swing cylinder. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0046] In the description of the present invention, it should 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" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0047] The specific implementation process of the present utility model is described below through multiple embodiments.

[0048] Example 1

[0049] See also Figures 1 to 5 This embodiment discloses a specific implementation method of a four-arm rubber-wheeled anchor drilling vehicle for coal mines (hereinafter referred to as the "drilling vehicle").

[0050] Four-arm rubber-wheeled anchor drilling vehicle for coal mines, see Figures 1 to 5 , including a rubber-wheeled chassis 1, a lifting assembly 2 and an anchor protection platform 3; the rubber-wheeled chassis 1 includes a front part 11 and a rear part 12, the front part 11 and the rear part 12 are hinged, the front part 11 is provided with a front wheel 13, and the rear part 12 is provided with a rear wheel 14. When turning, the front part 11 and the rear part 12 can rotate around the hinge point, and a swing cylinder 6 is provided at the hinge point, which makes it easier to turn. The front wheel 13 and the rear wheel 14 make the whole vehicle move more flexibly; the lifting assembly 2 is arranged between the front part 11 and the anchor protection platform 3; the lifting assembly 2 includes a first group of lifting cylinders 21, a second group of lifting cylinders 22, and a first connecting rod assembly 23 and a second connecting rod assembly 24; the first group of lifting cylinders 21 drives the first end 31 of the anchor guarding platform to rise and fall with the front part 11 as a fulcrum; the second group of lifting cylinders 22 drives the second end 32 of the anchor guarding platform to rise and fall with the front part 11 as a fulcrum; the first connecting rod assembly 23 is arranged between the first group of lifting cylinders 21; the second connecting rod assembly 24 is arranged between the second group of lifting cylinders 22; the anchor guarding platform 3 is provided with a first row of anchor guarding assemblies 33 and a second row of anchor guarding assemblies 34, the first row of anchor guarding assemblies 33 is provided with two drill arms, and the second row of anchor guarding assemblies 34 is provided with two drill arms.

[0051] Specifically, see Figures 1 to 5 In this embodiment, a first group of lifting cylinders 21 and a second group of lifting cylinders 22 are provided. The first group of lifting cylinders 21 is composed of two lifting cylinders, and the second group of lifting cylinders 22 is composed of two lifting cylinders. The fulcrums of the first group of lifting cylinders 21 and the second group of lifting cylinders 22 form a rectangle. The first group of lifting cylinders 21 and the second group of lifting cylinders 22 are independently controlled. When the drilling vehicle is on a ramp, by adjusting the lifting height of the first group of lifting cylinders 21 and the second group of lifting cylinders 22, not only the height of the anchor guard platform 3 can be changed, the operating range of the first row of anchor guard assemblies 33 and the second row of anchor guard assemblies 34 can be expanded, and the horizontal angle of the anchor guard platform 3 can be adjusted, thereby ensuring that the working position is in a horizontal position to facilitate standing and construction.

[0052] See also Figure 5When the lifting assembly 2 is in a lifting state, in order to improve the overall stability and rigidity, a first connecting rod assembly 23 is arranged between the first group of lifting cylinders 21, and a second connecting rod assembly 24 is arranged between the second group of lifting cylinders 22; wherein, the first connecting rod assembly 23 includes a first support plate 231 and a second support plate 232 which are hingedly connected, the first support plate 231 is hinged to the front part 11, and the second support plate 232 is hinged to the first end 31 of the anchor protection platform. The first support plate 231 and the second support plate 232 are unfolded as the first group of lifting cylinders 21 are lifted. After unfolding, the drilling vehicle body can be stabilized. For example, when the anchor rods are used, the first support plate 231 and the second support plate 232 can prevent the drilling vehicle body from shaking; the second connecting rod assembly 24 includes a triangular hinge seat 241 installed on the front part 11, an L The L-shaped support plate 242, the third support plate 243 and the fourth support plate 244; one end of the L-shaped support plate 242 is hinged to the third support plate 243, and the other end of the L-shaped support plate 242 is hinged to the first end 2411 of the triangular hinge seat; one end of the fourth support plate 244 is hinged to the second end 2412 of the triangular hinge seat, and the other end of the fourth support plate 244 is hinged to the third support plate 243; the third support plate 243 is hinged to the second end 32 of the anchoring platform, the L-shaped support plate 242, the third support plate 243 and the fourth support plate 244 are unfolded as the second group of lifting cylinders 22 are lifted, and can stabilize the drilling vehicle body after unfolding. For example, when the anchor rods are used, the L-shaped support plate 242, the third support plate 243 and the fourth support plate 244 can prevent the drilling vehicle body from shaking.

[0053] See also Figures 1 to 5The working principle of the first row anchor guard assembly 33 is as follows: the first row anchor guard assembly 33 includes a first gantry bracket 331 and a first anchor rod assembly 332 and a second anchor rod assembly 333 symmetrically arranged on both sides of the first gantry bracket 331; the second row anchor guard assembly 34 includes a second gantry bracket 341 and a third anchor rod assembly 342 and a fourth anchor rod assembly 343 symmetrically arranged on both sides of the second gantry bracket 341; the first vertical slide rail 334 and the first lifting rail 334 are respectively arranged on both sides of the first gantry bracket 331. The lowering cylinder 335, the second vertical slide rail 336 and the second lifting cylinder 337; the first anchor rod assembly 332 and the second anchor rod assembly 333 have the same structural principle. The first anchor rod assembly 332 is used as an example for explanation. The first anchor rod assembly 332 includes a first slide 3321, a first slewing assembly 3322, a first L-shaped hinge plate 3323, a first U-shaped mounting plate 3324, a first swing cylinder 3325 and a first drill arm 3326; the first lifting cylinder 335 is connected to the first gantry bracket 33 1 is a fulcrum to drive the first slide 3321 to rise and fall along the first vertical slide rail 334; the first rotary assembly 3322 is installed on the first slide 3321; the first L-shaped hinge plate 3323 and the first U-shaped mounting plate 3324 are hinged, and the first rotary assembly 3322 drives the first L-shaped hinge plate 3323 to rotate; the first drill arm 3326 is installed on the first U-shaped mounting plate 3324, and the first swing angle cylinder 3325 is supported by the first L-shaped hinge plate 3323. The first drill arm 3326 is driven by a point to swing back and forth; the lifting component 2 provides the first level of lifting for the first drill arm 3326, and the first lifting cylinder 335 provides the second level of lifting for the first drill arm 3326, so that the first drill arm 3326 has a large operating range; the first rotating component 3322 drives the first drill arm 3326 to switch between hitting the support and hitting the top or adjust its anchoring angle, which is convenient and flexible; the first swing angle cylinder 3325 drives the first drill arm 3326 to swing back and forth ±8°, and fine-tune the anchoring angle of the first drill arm 3326.

[0054] See also Figures 1 to 5, the working principle of the second row anchor guard assembly 34 is as follows: a third vertical slide rail 344, a third lifting cylinder 345, a fourth vertical slide rail 346 and a fourth lifting cylinder 347 are respectively arranged on both sides of the second gantry bracket 341; the structural principles of the third anchor rod assembly 342 and the fourth anchor rod assembly 343 are the same, and the third anchor rod assembly 342 is taken as an example for explanation below, the third anchor rod assembly 342 includes a second slide table 3421, a second rotating assembly 3422, a second L-shaped hinge plate 3423, a second U-shaped mounting plate 3424, a second swing angle cylinder 3425 and a second drill arm 3426; the third lifting cylinder 345 drives the second slide table 3421 to rise and fall along the third vertical slide rail 344 with the second gantry bracket 341 as a fulcrum; the second rotating assembly 3422 is installed on the second slide table 3421; the second L The second U-shaped hinge plate 3423 and the second U-shaped mounting plate 3424 are hinged, and the second rotating assembly 3422 drives the second L-shaped hinge plate 3423 to rotate; the second drill arm 3426 is installed on the second U-shaped mounting plate 3424, and the second swing angle cylinder 3425 drives the second drill arm 3426 to swing back and forth with the second L-shaped hinge plate 3423 as a fulcrum; the lifting assembly 2 provides the first-level lifting for the second drill arm 3426, and the third lifting cylinder 345 provides the second-level lifting for the second drill arm 3426, so that the second drill arm 3426 has a large operating range; the second rotating assembly 3422 drives the second drill arm 3426 to switch between helping and topping or adjust its anchoring angle, which is convenient and flexible; the second swing angle cylinder 3425 drives the second drill arm 3426 to swing back and forth by ±8°, and fine-tune the anchoring angle of the second drill arm 3426.

[0055] See also Figures 1 to 5 In order to keep the vehicle body stable, a first telescopic leg 4 is arranged in the middle of the first gantry support 331, and the telescopic direction of the first telescopic leg 4 is toward the top of the tunnel; a second telescopic leg 5 is arranged in the middle of the second gantry support 341, and the telescopic direction of the second telescopic leg 5 is toward the top of the tunnel. When the lifting assembly 2 is in the lifting state, the first telescopic leg 4 and the second telescopic leg 5 are lifted and supported against the top of the tunnel, which can not only play a certain supporting role, but also keep the vehicle body stable.

[0056] In order to ensure the flexibility and versatility of the drilling vehicle, an explosion-proof diesel engine power system and an explosion-proof motor power system are arranged at the rear portion 12. Both power systems can drive the lifting assembly 2 and the anchor protection platform 3, thereby increasing the adaptability.

Claims

1. A four-arm rubber-wheeled anchor drilling vehicle for coal mines, characterized in that: It includes rubber wheel chassis, lifting components and anchor protection platform; The rubber wheel chassis comprises a front part and a rear part, wherein the front part and the rear part are hinged; The lifting assembly is disposed between the front portion and the anchoring platform; The lifting assembly includes a first group of lifting cylinders, a second group of lifting cylinders, a first connecting rod assembly and a second connecting rod assembly; The first group of lifting cylinders drives the first end of the anchor protection platform to rise and fall with the front portion as a fulcrum; The second group of lifting cylinders drives the second end of the anchor protection platform to rise and fall with the front portion as a fulcrum; The first connecting rod assembly is disposed between the first group of lifting cylinders; The second connecting rod assembly is disposed between the second group of lifting cylinders; The anchoring platform is provided with a first row of anchoring assemblies and a second row of anchoring assemblies, the first row of anchoring assemblies is provided with two drilling arms, and the second row of anchoring assemblies is provided with two drilling arms.

2. The four-arm rubber-wheeled anchor drilling vehicle for coal mines according to claim 1, characterized in that: The front portion is provided with a front wheel, and the rear portion is provided with a rear wheel.

3. The four-arm rubber-wheeled anchor drilling vehicle for coal mines according to claim 1, characterized in that: The first link assembly includes a first support plate and a second support plate that are hingedly connected, wherein the first support plate is hingedly connected to the front portion, and the second support plate is hingedly connected to the first end of the anchor platform.

4. The four-arm rubber-wheeled anchor drilling vehicle for coal mines as claimed in claim 3, characterized in that: The second connecting rod assembly includes a triangular hinge seat mounted on the front portion, an L-shaped support plate, a third support plate and a fourth support plate; One end of the L-shaped support plate is hinged to the third support plate, and the other end of the L-shaped support plate is hinged to the first end of the triangular hinge seat; One end of the fourth support plate is hinged to the second end of the triangular hinge seat, and the other end of the fourth support plate is hinged to the third support plate; The third support plate is hinged to the second end of the anchoring platform.

5. The four-arm rubber-wheeled anchor drilling vehicle for coal mines according to claim 1, characterized in that: The first group of lifting cylinders and the second group of lifting cylinders are independently controlled.

6. The four-arm rubber-wheeled anchor drilling vehicle for coal mines as described in any one of claims 1 to 5, characterized in that: The first row of anchor guard assemblies includes a first gantry bracket and a first anchor rod assembly and a second anchor rod assembly symmetrically arranged on both sides of the first gantry bracket; The second row of anchor guard assemblies includes a second gantry bracket and a third anchor rod assembly and a fourth anchor rod assembly symmetrically arranged on both sides of the second gantry bracket.

7. The four-arm rubber-wheeled anchor drilling vehicle for coal mines as claimed in claim 6, characterized in that: A first vertical slide rail, a first lifting cylinder, a second vertical slide rail and a second lifting cylinder are respectively arranged on both sides of the first gantry bracket; The first anchor assembly includes a first slide, a first slewing assembly, a first L-shaped hinge plate, a first U-shaped mounting plate, a first swing cylinder and a first drill arm; The first lifting cylinder drives the first slide table to move up and down along the first vertical slide rail with the first gantry bracket as a fulcrum; The first rotary assembly is mounted on the first slide; The first L-shaped hinge plate is hinged to the first U-shaped mounting plate, and the first rotating assembly drives the first L-shaped hinge plate to rotate; The first drill arm is mounted on the first U-shaped mounting plate, and the first swing angle cylinder drives the first drill arm to swing forward and backward with the first L-shaped hinge plate as a fulcrum.

8. The four-arm rubber-wheeled anchor drilling vehicle for coal mines as claimed in claim 6, characterized in that: A third vertical slide rail, a third lifting cylinder, a fourth vertical slide rail and a fourth lifting cylinder are respectively arranged on both sides of the second gantry support; The third anchor assembly includes a second slide, a second slewing assembly, a second L-shaped hinge plate, a second U-shaped mounting plate, a second swing cylinder and a second drill arm; The third lifting cylinder drives the second slide table to move up and down along the third vertical slide rail with the second gantry bracket as a fulcrum; The second rotary assembly is mounted on the second slide; The second L-shaped hinge plate is hinged to the second U-shaped mounting plate, and the second rotary assembly drives the second L-shaped hinge plate to rotate; The second drill arm is mounted on the second U-shaped mounting plate, and the second swing angle cylinder drives the second drill arm to swing forward and backward with the second L-shaped hinge plate as a fulcrum.

9. The four-arm rubber-wheeled anchor drilling vehicle for coal mines as claimed in claim 6, characterized in that: A first telescopic leg is arranged in the middle of the first gantry support, and the telescopic direction of the first telescopic leg is toward the top of the tunnel; A second telescopic leg is arranged in the middle of the second gantry support, and the telescopic direction of the second telescopic leg is toward the top of the tunnel.

10. The four-arm rubber-wheeled anchor drilling vehicle for coal mines according to claim 6, characterized in that: An explosion-proof diesel engine power system and an explosion-proof motor power system are arranged at the rear.