Hydraulic propelling device for roadway support

Abstract

The hydraulic propelling device comprises a front supporting frame and a rear supporting frame which are used for bearing advance supporting equipment, front wheels are arranged on the two sides of the bottom of the front supporting frame, and rear wheels are arranged on the two sides of the bottom of the rear supporting frame. A hydraulic oil cylinder used for driving the front supporting frame and the rear supporting frame to move telescopically is arranged between the front supporting frame and the rear supporting frame, the front wheels and the rear wheels are both in transmission connection with a wheel driving mechanism, the wheel driving mechanism drives the front wheels and the rear wheels to steer synchronously, and the included angle between the axis of each front wheel and the axis of the corresponding rear wheel is kept 90 degrees all the time. According to the scheme, synchronous steering of the front wheel and the rear wheel is controlled through the wheel driving mechanism, the included angle of 90 degrees is kept between the axis of the front wheel and the axis of the rear wheel all the time, alternate conversion of the front supporting frame and the rear supporting frame between supporting and moving is ingeniously achieved, and therefore alternate propelling of the front supporting frame and the rear supporting frame is achieved.

Description

Technical Field

[0001] This invention relates to the field of tunnel support technology, and more specifically to a hydraulic propulsion device for tunnel support. Background Technology

[0002] In tunnel excavation operations in coal mines, metal mines, and tunnel engineering, to ensure construction safety, it is usually necessary to promptly install advanced support devices behind the tunneling machine to temporarily support the newly exposed roof or sidewalls to prevent tunnel collapse.

[0003] Currently, the movement of existing advanced support equipment relies on two methods. On the one hand, it depends on traction chains or external winches to pull the equipment. This method of movement occupies a lot of space and is difficult to implement in narrow roadways. On the other hand, it uses a stepping alternating support method to achieve the self-movement of the advanced support equipment. However, during the forward movement of the advanced support equipment, the lack of a stable and effective propulsion reaction support structure leads to insufficient stability of the advanced support equipment during the movement, which can easily result in the equipment remaining stationary or even moving backward.

[0004] Therefore, a propulsion device for advanced support is needed to provide stable and efficient forward propulsion in narrow tunnel spaces. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a hydraulic propulsion device for roadway support, which solves the problem of poor stability and reliability of existing advanced support equipment during propulsion.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A hydraulic propulsion device for roadway support is provided, comprising a front support frame and a rear support frame for carrying advanced support equipment. Front wheels are provided on both sides of the bottom of the front support frame, and rear wheels are provided on both sides of the bottom of the rear support frame. A hydraulic cylinder for driving the front and rear support frames to extend and retract is provided between the front and rear support frames. The front and rear wheels are both connected to a wheel drive mechanism, and the wheel drive mechanism drives the front and rear wheels to turn synchronously, and keeps the axis of the front wheel and the axis of the rear wheel at a 90-degree angle at all times.

[0007] Furthermore, the front and rear wheels are horizontally rotatable on the front and rear support frames via pivots. The wheel drive mechanism includes a front lead screw and a rear lead screw respectively mounted on the front and rear support frames. The front and rear lead screws are connected by a telescopic transmission mechanism, and the rear lead screw is connected to the drive motor. A front strip block and a rear strip block are respectively fitted on the front and rear lead screws. The two ends of the front strip block are fixedly connected to the pivots of the two front wheels via a linkage mechanism, and the two ends of the rear strip block are fixedly connected to the pivots of the two rear wheels via a linkage mechanism.

[0008] Furthermore, the linkage mechanism includes a first link and a second link, one end of the first link and the second link are horizontally hinged, the other end of the first link is horizontally hinged to the end of the front strip block or the rear strip block, and the other end of the second link is fixedly connected to the pivot of the front wheel or the rear wheel.

[0009] Furthermore, the telescopic transmission mechanism includes a telescopic sleeve disposed at the rear end of the front lead screw and a telescopic rod disposed at the front end of the rear lead screw. The telescopic rod and the telescopic sleeve are fitted together, and the outer wall of the telescopic rod is matched with the inner wall of the telescopic sleeve so that the telescopic rod and the telescopic sleeve rotate synchronously.

[0010] Furthermore, a front guide rod and a rear guide rod are respectively provided on the front support frame and the rear support frame, and the front strip block and the rear strip block are slidably sleeved on the front guide rod and the rear guide rod, respectively.

[0011] Furthermore, the front support frame is provided with a machine head housing at its front end, and the rear support frame is provided with support housings on both sides. Hydraulic cylinders are provided inside both support housings, and the extension and retraction ends of the two hydraulic cylinders are fixedly connected to the machine head housing.

[0012] Furthermore, a guide post is provided at the rear end of the front support frame, and a guide groove is provided at the front end of the rear support frame. The guide post and the guide groove are fitted together and together form a guide mechanism for guiding the telescopic movement of the front support frame and the rear support frame.

[0013] Furthermore, anti-slip treads are provided on both the front and rear wheels.

[0014] The beneficial effects of this invention are as follows: 1. This solution controls the synchronous steering of the front and rear wheels through a wheel drive mechanism, ensuring that the axle axes of the front and rear wheels always maintain a 90-degree angle. This cleverly achieves the alternating switching between support and movement of the front and rear support frames. When the front support frame needs to move forward, the front wheels automatically adjust to a rolling state parallel to the direction of movement, while the rear wheels maintain a braking support state perpendicular to the direction of movement. At this time, the hydraulic cylinder extends, and the rear support frame acts as a rigid reaction base to stably support the ground, ensuring the smooth advancement of the front support frame. When the rear support frame needs to move forward, the rear wheels turn to a parallel state, the front wheels turn to a perpendicular state, the hydraulic cylinder retracts, and the front support frame acts as an anchor point to pull the rear support frame forward. This alternating support design fundamentally solves the problem of swaying, backward movement, or even inability to move caused by the lack of effective reaction force when changing steps in traditional equipment, significantly improving the propulsion stability of the equipment in the tunnel.

[0015] 2. This scheme utilizes the change in wheel direction to convert the device's own weight into effective propulsion reaction force. During any propulsion phase, one set of wheels is always in a vertical braking state, using the sliding resistance between the wheels and the ground to form a stable fulcrum. This allows the thrust or pull force of the hydraulic cylinder to be fully applied to the movement of the other set of wheels, avoiding ineffective energy loss due to slippage or loose fulcrum. This purely mechanical fulcrum switching method allows for more direct energy transfer and higher utilization, thereby improving propulsion efficiency.

[0016] 3. This solution eliminates the need for separate steering systems for the front and rear support frames. The telescopic transmission mechanism ensures that when the front and rear support frames undergo relative displacement under the action of the hydraulic cylinder, the front and rear lead screws can still rotate synchronously, ensuring that the 90-degree angle between the front and rear wheels remains constant. This highly integrated transmission structure not only reduces the space occupied by the equipment, making it more suitable for working environments in narrow alleys, but also simplifies the control process and improves the stability and reliability of the device.

[0017] 4. The guide column and guide groove of this solution constitute a sliding guide mechanism, which provides precise guidance for the relative movement of the front and rear support frames during the extension and retraction of the hydraulic cylinder, so as to prevent jamming or structural deformation caused by uneven load and ensure the stability of the wheel steering system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The above and other objects, features, and advantages of the present invention will become clearer through the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not intentionally drawn to scale to actual dimensions; the focus is on illustrating the main points of the invention.

[0019] Figure 1 This is a schematic diagram of a hydraulic propulsion device used for roadway support.

[0020] Figure 2 This is a schematic diagram of the wheel drive mechanism.

[0021] Figure 3 This is a structural diagram of the head housing and the support housing.

[0022] Among them, 1. front support frame, 2. rear support frame, 3. front wheel, 4. rear wheel, 5. hydraulic cylinder, 6. pivot, 7. front lead screw, 8. rear lead screw, 9. drive motor, 10. front strip block, 11. rear strip block, 12. first connecting rod, 13. second connecting rod, 14. telescopic sleeve, 15. telescopic rod, 16. front guide rod, 17. rear guide rod, 18. machine head housing, 19. support housing, 20. guide column, 21. guide groove, 22. anti-slip texture. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0027] Example 1 like Figures 1 to 3 As shown, the hydraulic propulsion device for roadway support in this scheme includes a front support frame 1 and a rear support frame 2 for carrying advanced support equipment. The advanced support equipment can be a hydraulic jacking device. Front wheels 3 are provided on both sides of the bottom of the front support frame 1, and rear wheels 4 are provided on both sides of the bottom of the rear support frame 2. A hydraulic cylinder 5 is provided between the front support frame 1 and the rear support frame 2 to drive their telescopic movement. The front wheels 3 and the rear wheels 4 are both connected to the wheel drive mechanism, and the wheel drive mechanism drives the front wheels 3 and the rear wheels 4 to turn synchronously, and keeps the axis of the front wheel 3 and the axis of the rear wheel 4 at a 90-degree angle at all times.

[0028] This solution controls the synchronous steering of the front and rear wheels 4 through a wheel drive mechanism, ensuring that the axle of the front wheel 3 and the axle of the rear wheel 4 always maintain a 90-degree angle. This cleverly achieves the alternating switching between support and movement of the front support frame 1 and the rear support frame 2. When the front support frame 1 needs to move forward, the hydraulic jacking device on the front support frame 1 retracts, and the front wheel 3 automatically adjusts to a rolling state parallel to the direction of movement, while the rear wheel 4 maintains a braking support state perpendicular to the direction of movement. At this time, the hydraulic cylinder 5 extends, and the rear support frame 2 acts as a rigid reaction base to stably support the ground, ensuring the smooth advancement of the front support frame 1. When the rear support frame 2 needs to move forward, the hydraulic jacking device on the rear support frame 2 retracts, the rear wheel 4 turns to a parallel state, the front wheel 3 turns to a perpendicular state, the hydraulic cylinder 5 retracts, and the front support frame 1 acts as an anchor point to pull the rear support frame 2 forward. This alternating support design fundamentally solves the problem of swaying, backward movement, or even inability to move caused by the lack of effective reaction force when changing steps in traditional equipment, significantly improving the advancement stability of the equipment in the tunnel.

[0029] Both the front wheel 3 and the rear wheel 4 of this design are equipped with anti-slip treads 22. By utilizing the change in wheel direction, the self-weight of the device is converted into an effective propulsive reaction force. During any propulsion phase, one set of wheels is always in a vertical braking state. The frictional resistance between the wheels and the ground forms a stable fulcrum, allowing the thrust or pull of the hydraulic cylinder 5 to be fully applied to the movement of the other set of wheels, avoiding ineffective energy loss due to slippage or loose fulcrum. This purely mechanical fulcrum switching method allows for more direct energy transfer and higher utilization, thereby improving propulsion efficiency.

[0030] Example 2 This embodiment is a further limitation based on embodiment 1. The front wheel 3 and the rear wheel 4 are horizontally rotatable on the front support frame 1 and the rear support frame 2 via pivot 6. The wheel drive mechanism includes a front lead screw 7 and a rear lead screw 8 respectively mounted on the front support frame 1 and the rear support frame 2. The front lead screw 7 and the rear lead screw 8 are connected by a telescopic transmission mechanism. The rear lead screw 8 is connected to the drive motor 9. A front strip block 10 and a rear strip block 11 are respectively fitted on the front lead screw 7 and the rear lead screw 8. The two ends of the front strip block 10 are fixedly connected to the pivot 6 of the two front wheels 3 via a linkage mechanism. The two ends of the rear strip block 11 are fixedly connected to the pivot 6 of the two rear wheels 4 via a linkage mechanism.

[0031] Specifically, the linkage mechanism includes a first link 12 and a second link 13. One end of the first link 12 and the second link 13 are horizontally hinged. The other end of the first link 12 is horizontally hinged to the end of the front strip block 10 or the rear strip block 11. The other end of the second link 13 is fixedly connected to the pivot 6 of the front wheel 3 or the rear wheel 4. A front guide rod 16 and a rear guide rod 17 are respectively provided on the front support frame 1 and the rear support frame 2. The front strip block 10 and the rear strip block 11 are slidably sleeved on the front guide rod 16 and the rear guide rod 17, respectively.

[0032] In practical implementation, the drive motor 9 of this scheme can drive the front lead screw 7 and the rear lead screw 8 to rotate synchronously, and drive the front strip block 10 and the rear strip block 11 to slide under the guidance of the front guide rod 16 and the rear guide rod 17. The sliding front strip block 10 and the rear strip block 11 can drive the end of the first connecting rod 12 to move, thereby causing the first connecting rod 12 and the second connecting rod 13 to deflect adaptively. The deflected second connecting rod 13 can drive the front wheel 3 and the rear wheel 4 to steer. In particular, on the front support frame 1 and the rear support frame 2 The transmission structure is symmetrically arranged, with the front lead screw 7 and the rear lead screw 8 having opposite thread directions to drive the front wheel 3 and the rear wheel 4 to rotate synchronously in opposite directions. The steering angles of the front wheel 3 and the rear wheel 4 are kept highly consistent. In the design, it is only necessary to arrange the front wheel 3 and the rear wheel 4 at a 90-degree angle in the initial state. The drive motor 9 can be a servo motor that precisely controls the rotation angle to control the travel of the front strip block 10 and the rear strip block 11, so as to precisely control the deflection angle of the front wheel 3 and the rear wheel 4 at 90 degrees.

[0033] Example 3 This embodiment is based on embodiment 2 and provides a specific scheme for the telescopic transmission mechanism. The telescopic transmission mechanism includes a telescopic sleeve 14 disposed at the rear end of the front lead screw 7 and a telescopic rod 15 disposed at the front end of the rear lead screw 8. The telescopic rod 15 and the telescopic sleeve 14 are fitted together, and the outer wall of the telescopic rod 15 is adapted to the inner wall of the telescopic sleeve 14 so that the telescopic rod 15 and the telescopic sleeve 14 rotate synchronously.

[0034] Specifically, a rack can be provided on the outer wall of the telescopic rod 15, and a toothed groove that matches the rack can be provided on the inner wall of the telescopic sleeve 14. Alternatively, the cross-sections of the outer wall of the telescopic rod 15 and the inner wall of the telescopic sleeve 14 can be designed as mutually matching polygonal shapes, so that the telescopic rod 15 and the telescopic sleeve 14 can always rotate synchronously when they are in telescopic cooperation.

[0035] This solution eliminates the need for separate steering systems for the front and rear support frames 2. Through the telescopic transmission mechanism, when the front and rear support frames 2 undergo relative displacement under the action of the hydraulic cylinder 5, the front lead screw 7 and the rear lead screw 8 can still rotate synchronously, ensuring that the 90-degree angle between the front and rear wheels 4 remains unchanged. This highly integrated transmission structure not only reduces the space occupied by the equipment, making it more suitable for the working environment of narrow alleys, but also simplifies the control process and improves the stability and reliability of the device.

[0036] Example 4 This embodiment is a further limitation based on embodiment 1. The front support frame 1 is provided with a head housing 18 at its front end to block and push away gravel or debris at the front end; both sides of the rear support frame 2 are provided with support housings 19, and each of the two support housings 19 is provided with a hydraulic cylinder 5. The extension and retraction ends of the two hydraulic cylinders 5 are fixedly connected to the head housing 18. The transmission is direct and efficient, and does not interfere with the wheel drive mechanism. The support housings 19 can effectively protect the hydraulic cylinders 5.

[0037] The rear end of the front support frame 1 is provided with a guide post 20, and the front end of the rear support frame 2 is provided with a guide groove 21. The guide post 20 and the guide groove 21 are engaged and together form a guide mechanism for guiding the telescopic movement of the front support frame 1 and the rear support frame 2. This is to provide precise guidance for the relative movement of the front and rear support frames 2 during the telescopic movement of the hydraulic cylinder 5, so as to prevent jamming or structural deformation caused by uneven load and ensure the stability of the wheel steering system.

[0038] Although the specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent; various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.

Claims

1. A hydraulic propulsion device for roadway support, characterized in that, It includes a front support frame and a rear support frame for supporting advanced support equipment. Front wheels are provided on both sides of the bottom of the front support frame, and rear wheels are provided on both sides of the bottom of the rear support frame. A hydraulic cylinder is provided between the front support frame and the rear support frame to drive them to extend and retract. The front wheels and the rear wheels are both connected to a wheel drive mechanism, and the wheel drive mechanism drives the front wheels and the rear wheels to turn synchronously, and keeps the axis of the front wheel and the axis of the rear wheel at a 90-degree angle at all times.

2. The hydraulic propulsion device for roadway support according to claim 1, characterized in that, The front and rear wheels are horizontally rotatable on the front and rear support frames via pivots. The wheel drive mechanism includes a front lead screw and a rear lead screw respectively mounted on the front and rear support frames. The front and rear lead screws are connected by a telescopic transmission mechanism. The rear lead screw is connected to a drive motor. A front strip block and a rear strip block are respectively fitted on the front and rear lead screws. The two ends of the front strip block are fixedly connected to the pivots of the two front wheels via a linkage mechanism. The two ends of the rear strip block are fixedly connected to the pivots of the two rear wheels via a linkage mechanism.

3. The hydraulic propulsion device for roadway support according to claim 2, characterized in that, The linkage mechanism includes a first link and a second link. One end of the first link and the second link are horizontally hinged together. The other end of the first link is horizontally hinged to the end of the front strip block or the rear strip block. The other end of the second link is fixedly connected to the pivot of the front wheel or the rear wheel.

4. The hydraulic propulsion device for roadway support according to claim 2, characterized in that, The telescopic transmission mechanism includes a telescopic sleeve disposed at the rear end of the front lead screw and a telescopic rod disposed at the front end of the rear lead screw. The telescopic rod is fitted into the telescopic sleeve, and the outer wall of the telescopic rod is adapted to the inner wall of the telescopic sleeve so that the telescopic rod and the telescopic sleeve rotate synchronously.

5. The hydraulic propulsion device for roadway support according to claim 2, characterized in that, The front support frame and the rear support frame are respectively provided with a front guide rod and a rear guide rod, and the front strip block and the rear strip block are respectively slidably sleeved on the front guide rod and the rear guide rod.

6. The hydraulic propulsion device for roadway support according to claim 1, characterized in that, The front support frame has a machine head housing at its front end, and the rear support frame has support housings on both sides. Each of the two support housings contains a hydraulic cylinder, and the extension and retraction ends of the two hydraulic cylinders are fixedly connected to the machine head housing.

7. The hydraulic propulsion device for roadway support according to claim 1, characterized in that, The rear end of the front support frame is provided with a guide post, and the front end of the rear support frame is provided with a guide groove. The guide post and the guide groove are fitted together and together form a guide mechanism for guiding the telescopic movement of the front support frame and the rear support frame.

8. The hydraulic propulsion device for roadway support according to claim 1, characterized in that, Both the front and rear wheels are equipped with anti-slip treads.

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