Supporting shoe device of heading machine and heading machine

Abstract

The utility model relates to the field of heading machines, in particular to a heading machine gripper shoe device and a heading machine. A supporting shoe device of a heading machine comprises a supporting shoe, a return driving device, a meshing part and a connecting part, the supporting shoe comprises an arc-shaped supporting plate and a shoe plate on the inner side of the supporting plate, and an upper return driving device and / or a lower return driving device are / is arranged between the supporting plate and the shoe plate to form a built-in return driving device. The shoe plate is provided with through holes in one-to-one correspondence with the return driving devices, and the through holes are used for the return driving devices to transmit force to the meshing part. The upper return driving device and / or the lower return driving device are / is arranged between the supporting plate and the shoe plate to form a built-in return driving device, so that a large space is formed, and a walking platform or a material channel is prevented from being occupied; therefore, the problem that in the prior art, the return driving device is arranged on the inner side of the shoe plate of the supporting shoe and occupies the space between the two supporting shoes, and consequently the space between the two supporting shoes becomes small is solved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel boring machines, in particular to a tunnel boring machine support shoe device and a tunnel boring machine. Background Art

[0002] In the process of tunnel construction, a tunnel boring machine is often used to dig the tunnel. The tunnel boring machine includes a cutterhead at the front end and a main beam behind the cutterhead. A support shoe is also provided at the rear end of the main beam, and a thrust cylinder is provided between the main beam and the support shoe. The support shoe is used to support the side wall of the excavated tunnel. When in use, the two ends of the thrust cylinder act on the support shoe and the main beam respectively. The main beam and the support shoe are subjected to a set of forces of equal magnitude and opposite directions. The support shoe remains fixed to the side wall of the tunnel due to friction. In other words, if the cutterhead wants to move forward, the support shoe needs to be stably supported on the side wall of the tunnel. When the thrust cylinder extends to a set length and pushes the cutterhead to dig a certain distance, the support shoe shrinks and leaves the side wall of the tunnel, and moves forward under the contraction of the thrust cylinder, that is, the tunnel boring machine moves forward through the step-changing operation.

[0003] Due to the complexity of geological conditions, the side walls of excavated tunnels are not necessarily hard and flat. For example, broken fracture zones may be encountered during tunnel excavation. The tunnel wall formed on the broken fracture zone is of poor quality, and collapse and slag accumulation often occur on the side of the tunnel. When the gripper is supported on an irregular side wall, the gripper's posture will change and deflect. When the step-changing operation is performed, the gripper will be retracted in the changed posture and then move forward. The gripper with the changed posture will interfere with the rock wall or equipment, resulting in obstruction of forward movement. Therefore, there is also a structure in the prior art for automatically adjusting the gripper of the tunnel boring machine.

[0004] For example, a Chinese utility model patent with authorization announcement number CN206419024U and authorization announcement date August 18, 2017 discloses an automatic self-centering drive device for a main beam type TBM support shoe and a main beam type TBM. The self-centering drive device includes a double spherical meshing end portion arranged on the support shoe cylinder and a ball head (i.e., a connecting portion) mating therewith, and the ball head is fixedly connected to the support shoe. The support shoe includes an arc-shaped support plate for fitting with the side wall of the tunnel and a shoe plate located on the inner side of the support plate. Four stabilizing cylinders (i.e., return drive devices) are also arranged on the shoe plate of the support shoe. The stabilizing cylinders include a cylinder body located outside the support shoe and a telescopic rod extending into the support shoe. The end of the telescopic rod is hingedly connected with a transmission connecting rod. The transmission connecting rod constitutes a lever structure, one end of which is connected to the stabilizing cylinder, and the other end is abutted against the double spherical meshing end through a balancing pin. The force generated by the stabilizing cylinder acts on the support shoe and the double spherical meshing end respectively. Since the four groups of stabilizing cylinders are evenly distributed, the force will be balanced only when the strokes of the telescopic rods of the four groups of stabilizing cylinders are consistent. When the strokes of the four groups of stabilizing cylinders are consistent, the support shoe is also in a return state.

[0005] However, in the above technical solution, the four groups of stabilizing cylinders are all outside the support shoes, which will squeeze the space between the two groups of support shoes. A walking platform for people to walk on needs to be set above the ball head between the two support shoes, and the position below the ball head between the two support shoes needs to be used as a material channel for materials and slag to pass through. The stabilizing cylinder extends toward the ball head to occupy space, so it is necessary to increase the height of the walking platform to avoid the stabilizing cylinder. However, the height of the tunnel is limited. Raising the walking platform will cause the distance between the walking platform and the top of the tunnel to become smaller, and people are prone to bumping into each other during walking, which brings safety problems. The setting of the cylinder at the bottom will cause the material channel to become narrower. That is, the external stabilizing cylinder and the horizontal arrangement of the cylinder will occupy the space between the two support shoes, resulting in the problem of smaller space between the two support shoes. Utility Model Content

[0006] The purpose of the utility model is to provide a tunnel boring machine shoe device, which is used to solve the problem in the prior art that the return drive device is arranged on the inner side of the shoe plate of the shoe, occupying the space between the two shoes, resulting in a decrease in the space between the two shoes; the purpose of the utility model is also to provide a tunnel boring machine for solving the above-mentioned technical problems.

[0007] In order to achieve the above-mentioned purpose, the roadheader shoe device in the utility model adopts the following technical solutions:

[0008] A tunnel boring machine support shoe device comprises a support shoe, a return drive device, an engaging portion for being arranged at the end of the support shoe cylinder and a connecting portion fixedly arranged on the support shoe and forming a spherical pair with the engagement portion, the support shoe comprises an arc-shaped support plate and a shoe plate inside the support plate, the return drive device comprises an upper return drive device arranged above the connecting portion and a lower return drive device arranged below the connecting portion, the upper return drive device and / or the lower return drive device are arranged between the support plate and the shoe plate to form a built-in return drive device, and the shoe plate is provided with through holes corresponding to the return drive devices one by one, and the through holes are used for the return drive device to transmit force to the engagement portion.

[0009] Furthermore, one of the through holes is directly opposite to the built-in aligning driving device, so that the built-in aligning driving device is in abutment contact with the meshing portion through the through hole.

[0010] Furthermore, the built-in return drive device is a hydraulic cylinder.

[0011] Furthermore, a fixing plate is fixedly provided inside the shoe plate, and the cylinder body of the built-in return driving device is fixedly connected to the fixing plate.

[0012] Furthermore, a portion of the support plate corresponding to the built-in return drive device is provided with an inspection opening, and an inspection cover is provided on the inspection opening.

[0013] Furthermore, the lower return drive device is hinged on the side of the shoe plate away from the support plate, and a driving connecting rod hinged on the support shoe is arranged between the lower return drive device and the meshing portion, one end of the driving connecting rod extends out of the shoe plate and is hingedly connected to the lower return drive device, and the other end extends between the shoe plate and the support plate and is used to apply force to the meshing portion.

[0014] Furthermore, the driving connecting rod is angular, and one end of the driving connecting rod extends out of the shoe plate.

[0015] Furthermore, the lower return drive device is a hydraulic cylinder, which is arranged below the driving connecting rod and has a tendency to retract when the support shoe is in the return state.

[0016] Furthermore, the driving connecting rod is hingedly arranged on the shoe plate.

[0017] The beneficial effects of the tunnel boring machine shoe device in the utility model are as follows: the utility model improves the existing tunnel boring machine shoe device, and facilitates the formation of a spherical pair by setting a meshing portion and a connecting portion, so that the shoe can move relative to the shoe cylinder; the upper return drive device and / or the lower return drive device are arranged between the support plate and the shoe plate to constitute a built-in return drive device, thereby forming a larger space in the part where the built-in return drive device is arranged, avoiding crowding of the walking platform or the material channel, and arranging perforations on the shoe plate to facilitate the return drive device to transmit force to the meshing portion, thereby facilitating the transmission of force, thereby solving the problem in the prior art that the return drive device is arranged on the inner side of the shoe plate of the shoe, occupying the space between the two shoes, resulting in a smaller space between the two shoes.

[0018] In order to achieve the above-mentioned purpose, the tunnel boring machine in the utility model adopts the following technical solutions:

[0019] A tunneling machine comprises two symmetrically arranged shoe devices, a shoe cylinder is further arranged between the two shoe devices, wherein the shoe device comprises a shoe, a return drive device, a meshing portion for being arranged at the end of the shoe cylinder and a connecting portion fixedly arranged on the shoe and forming a spherical pair with the meshing portion, the shoe comprises an arc-shaped support plate and a shoe plate on the inner side of the support plate, the return drive device comprises an upper return drive device arranged above the connecting portion and a lower return drive device arranged below the connecting portion, the upper return drive device and / or the lower return drive device are arranged between the support plate and the shoe plate to form a built-in return drive device, the shoe plate is provided with through holes corresponding to the return drive devices one by one, the through holes are provided for the return drive device to transmit force to the meshing portion, the meshing portions are respectively provided at both ends of the shoe cylinder, a walking platform is provided on the inner side of the shoe and above the connecting portion, and a material channel for materials and slag to pass through is formed between the two shoe and at the bottom of the connecting portion.

[0020] Furthermore, one of the through holes is directly opposite to the built-in aligning driving device, so that the built-in aligning driving device is in abutment contact with the meshing portion through the through hole.

[0021] Furthermore, the built-in return drive device is a hydraulic cylinder.

[0022] Furthermore, a fixing plate is fixedly provided inside the shoe plate, and the cylinder body of the built-in return driving device is fixedly connected to the fixing plate.

[0023] Furthermore, a portion of the support plate corresponding to the built-in return drive device is provided with an inspection opening, and an inspection cover is provided on the inspection opening.

[0024] Furthermore, the lower return drive device is hinged on the side of the shoe plate away from the support plate, and a driving connecting rod hinged on the support shoe is arranged between the lower return drive device and the meshing portion, one end of the driving connecting rod extends out of the shoe plate and is hingedly connected to the lower return drive device, and the other end extends between the shoe plate and the support plate and is used to apply force to the meshing portion.

[0025] Furthermore, the driving connecting rod is angular, and one end of the driving connecting rod extends out of the shoe plate.

[0026] Furthermore, the lower return drive device is a hydraulic cylinder, which is arranged below the driving connecting rod and has a tendency to retract when the support shoe is in the return state.

[0027] Furthermore, the driving connecting rod is hingedly arranged on the shoe plate.

[0028] The beneficial effects of the tunnel boring machine shoe device in the utility model are as follows: the utility model improves the existing tunnel boring machine, and facilitates the formation of a spherical pair by setting a meshing portion and a connecting portion, so that the shoe can move relative to the shoe cylinder; the upper return drive device and / or the lower return drive device are arranged between the support plate and the shoe plate to constitute a built-in return drive device, thereby forming a larger space in the part where the built-in return drive device is arranged, avoiding crowding of the walking platform or the material channel, and arranging perforations on the shoe plate to facilitate the return drive device to transmit force to the meshing portion, thereby facilitating the transmission of force, thereby solving the problem in the prior art that the return drive device is arranged on the inner side of the shoe plate of the shoe, occupying the space between the two shoes, resulting in a smaller space between the two shoes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of a tunnel boring machine in the utility model;

[0030] Figure 2 It is a front view of an embodiment of the roadheader shoe device of the utility model;

[0031] Figure 3A side view of an embodiment of a shoe support device for a roadheader in the utility model;

[0032] Figure 4 It is a top view of an embodiment of the roadheader shoe device in the utility model.

[0033] In the figure: 11, top cylinder; 111, fixing plate; 12, middle cylinder; 13, bottom cylinder; 2, support shoe; 21, support plate; 22, shoe plate; 23, ball head; 24, inspection cover; 3, support shoe cylinder; 31, meshing part; 4, middle driving connecting rod; 5, bottom driving connecting rod; 6, top pin push shaft; 7, walking platform. DETAILED DESCRIPTION

[0034] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0035] In the utility model, the return drive device located above and / or below the connection part in the roadheader shoe device is arranged between the support plate and the shoe plate to form a built-in return drive device, so that the part of the built-in return drive device no longer occupies the space between the two shoes.

[0036] In the embodiment 1 of the roadheader shoe device of the utility model:

[0037] like Figure 2 and Figure 3 As shown, the tunnel boring machine shoe device includes a shoe 2, a meshing portion 31 for being arranged at the end of the shoe cylinder 3, and a connecting portion fixedly arranged on the shoe 2 and forming a spherical pair with the meshing portion 31. The shoe 2 includes an arc-shaped support plate 21 for fitting with the side wall of the tunnel and a shoe plate 22 located inside the support plate 21, and the shoe plate 22 is a flat plate. The connecting portion is fixedly arranged on the shoe plate 22 of the shoe 2. Specifically, the connecting portion is a ball head 23, one side of the ball head 23 is flush with the shoe plate 22 of the shoe 2, and the other side of the connecting portion is formed with a spherical surface protruding outward, and accordingly, the meshing portion 31 has an inwardly concave spherical surface meshed with the spherical surface on the connecting portion. There is a certain distance between the end of the meshing portion 31 and the shoe plate 22 of the shoe 2, so that when the connecting portion and the meshing portion 31 are matched, the meshing portion 31 will not interfere with the shoe plate 22. Of course, in other embodiments, a concave spherical surface may be provided on the connecting portion, and an outwardly convex spherical surface may be provided on the meshing portion 31 .

[0038] The meshing portion 31 has a larger area on the circumference than the ball head 23, so that when the spherical surface is matched, part of the structure on the meshing portion 31 will be exposed, which is convenient for the force to be applied during the return. At least three return driving devices are also arranged on the outer circumference of the ball head 23, and the return driving devices are arranged at intervals. The return driving devices are used to apply force to the meshing portion 31 and the connecting portion, so that the position is adjusted under the action of the spherical surface. When the gripper 2 is in the return state, multiple return driving devices are in a force balance state. On the contrary, when the gripper 2 is not in the return state, multiple return driving devices are unbalanced in force, and the unbalanced force will act on the ball head 23 and the meshing portion 31, so that the ball head 23 and the meshing portion 31 automatically return to the return state, thereby facilitating the automatic return of the gripper 2. In this embodiment, there are four return drive devices, one of which is located above the ball head 23 to constitute an upper return drive device, and one is located below the ball head 23 to constitute a lower return drive device. In addition, two return drive devices are provided and are respectively located on both sides of the ball head 23 in the horizontal direction.

[0039] The upper return drive device is arranged between the support plate 21 and the shoe plate 22 to form a built-in return drive device. The built-in return drive device is a hydraulic cylinder, which is called the top cylinder 11 in this embodiment. In order to facilitate the transmission of the force of the return drive device on the meshing portion 31, a through hole corresponding to the return drive device is arranged on the shoe plate 22, wherein the through hole at the top is directly opposite to the top cylinder 11, so that the top cylinder 11 can pass the telescopic rod of the cylinder through the through hole and act on the meshing portion 31. Specifically, a fixing plate 111 is fixedly arranged inside the shoe plate 22, and a flange surface is arranged on the cylinder body of the top cylinder 11. The flange surface on the cylinder body is fixedly connected with the fixing plate 111, that is, the cylinder body is fixedly arranged on the support shoe 2. Of course, in other embodiments, the upper return drive device can also be set as an elastic member such as a spring, rubber, etc., and a push pin shaft 6 abutting on the elastic member is arranged in the top through hole, and the push pin shaft 6 is force applied by the elastic member to facilitate return. Alternatively, in other embodiments, the upper return drive device may also be configured as a spring, which is placed in the through hole and directly contacts the meshing portion. Alternatively, in other embodiments, a mounting bracket may be provided between the support plate 21 and the shoe plate 22 of the support shoe 2, and the end of the top oil cylinder 11 may be provided on the mounting bracket, so that a force is applied to the top oil cylinder 11 through the mounting bracket.

[0040] The top oil cylinder 11 is arranged between the shoe plate 22 and the support plate 21, that is, the top oil cylinder 11 is hidden inside the shoe 2 when it is working. Some parts will inevitably fail or need to be replaced, so an inspection port is also provided on the support plate 21 corresponding to the top oil cylinder 11. In order to prevent the debris from entering the inspection port, an inspection cover 24 is also provided on the inspection port, and the debris is blocked by the inspection cover 24 to prevent the debris from entering the inside of the shoe 2. At the same time, the inspection cover 24 can be opened to inspect the top oil cylinder 11 inside when it is needed.

[0041] By placing the upper return drive device inside, it is convenient to save the space between the two grippers 2, thereby facilitating the arrangement of the top walking platform 7. In addition, the space between the bottoms of the grippers 2 is related to the size of the material space, so in this embodiment, the return drive device at the bottom of the grippers 2 is also improved to increase the size of the material channel.

[0042] Specifically, Figure 2 and Figure 3 The lower return drive device shown is a hydraulic cylinder arranged at the bottom, which is called the bottom cylinder 13. The bottom cylinder 13 is hinged to the side of the shoe plate 22 away from the support plate 21. At this time, the bottom cylinder 13 cannot directly contact the meshing portion 31. Therefore, the automatic return drive device also includes a driving connecting rod located between the bottom cylinder 13 and the meshing portion 31 and hingedly arranged on the shoe plate 22. Since the driving connecting rod is arranged at the bottom, it is called the bottom driving connecting rod 5. One end of the bottom driving connecting rod 5 extends out of the shoe plate 22 and is hingedly connected to the return drive device, and the other end extends between the shoe plate 22 and the support plate 21 and is used to apply force to the meshing portion 31. Specifically, the bottom driving connecting rod 5 is angular, one end of the bottom driving connecting rod 5 is hingedly connected to the telescopic rod of the bottom cylinder 13, and the other end extends between the support plate 21 and the shoe plate 22 to facilitate the application of force to the meshing portion 31. A push pin shaft 6 is arranged in the through hole at the bottom of the shoe plate 22, and one end of the bottom driving connecting rod 5 abuts against the push pin shaft 6 to facilitate pushing. In addition, in order to facilitate the arrangement of the bottom oil cylinder 13, the bottom oil cylinder 13 is arranged below the bottom driving connecting rod 5, and the bottom oil cylinder 13 has a tendency to retract when the shoe 2 is in the return state. That is, the retraction of the bottom oil cylinder 13 drives one end of the bottom driving connecting rod 5 to move, and then the other end of the bottom driving connecting rod 5 is based on the push pin shaft, and then the action force of the oil cylinder acts on the meshing portion 31.

[0043] Of course, in other embodiments, the bottom driving link 5 may no longer be arranged on the shoe plate 22, but a mounting bracket may be arranged between the support plate 21 and the shoe plate 22, and the bottom driving link 5 may be arranged on the mounting bracket. Alternatively, in other embodiments, the bottom oil cylinder 13 may be arranged above the bottom driving link 5, and the force generated by the bottom oil cylinder 13 is a thrust force pushing outward. Alternatively, in other embodiments, the bottom driving link 5 may no longer be arranged in an angle shape, but in a straight shape, and the push pin shaft 6 is pushed onto the meshing portion 31 by the straight bottom driving link 5.

[0044] In addition, if Figure 4 As shown, the present embodiment further includes two middle oil cylinders 12 respectively arranged on both sides of the ball head 23. The two middle oil cylinders 12 are arranged on the shoe plate 22, and the cylinder bodies are arranged outside. The telescopic rod passes through the shoe plate 22 and telescopes inward. A middle driving connecting rod 4 is also hingedly arranged at the end of the telescopic rod. The middle driving connecting rod 4 is generally in a straight line shape. A pushing pin shaft 6 for pushing on the meshing portion 31 is also arranged at the end of one end of the middle driving connecting rod 4. Of course, in other embodiments, the four return drive devices can also be arranged as cylinders.

[0045] That is to say, the shoe 2 is fixedly provided with a ball head 23, and four through holes are respectively provided around the ball head 23, wherein three through holes are provided with push pin shafts 6 for transmitting the force of the hydraulic cylinder to the meshing part 31, and the top oil cylinder 11 is provided on the through hole at the top, and the force is directly applied to the meshing part 31 through the oil cylinder, thereby facilitating the force balance and the adaptive adjustment of the ball head 23 and the meshing part 31. The above arrangement facilitates the arrangement of the walking platform 7 at the top and also facilitates the increase of the size of the material channel at the bottom.

[0046] In the embodiment 2 of the tunnel boring machine shoe device (hereinafter referred to as the automatic return drive device) in the utility model:

[0047] This embodiment is improved on the basis of the embodiment 1. The difference from the embodiment 1 is that the arrangement of the top oil cylinder and the bottom oil cylinder is improved in this embodiment.

[0048] Specifically, the bottom cylinder adopts the same arrangement as the middle cylinder, and the top cylinder still retains the same arrangement as the top cylinder in Example 1, thereby facilitating the arrangement of the walking platform.

[0049] Alternatively, in other embodiments, both the top cylinder and the bottom cylinder are arranged in a built-in manner, which is the same as the arrangement of the top cylinder in Example 1.

[0050] Alternatively, in other embodiments, only the bottom cylinder is arranged in a built-in arrangement, that is, the bottom cylinder has the same arrangement as the top cylinder in Example 1, and the top cylinder has the same arrangement as the middle cylinder.

[0051] In the embodiment of the tunnel boring machine of the present utility model:

[0052] like Figure 1 As shown, in this embodiment, the tunnel boring machine includes two symmetrically arranged shoe support devices, and the shoe support devices in this embodiment have the same structure as the tunnel boring machine shoe support device in Example 1 of the tunnel boring machine shoe support device. A shoe support cylinder 3 for supporting the two shoe support devices is also provided between the two shoe support devices, and the ends of the shoe support cylinder 3 are respectively fixedly connected to the meshing parts 31 in the shoe support device. A walking platform 7 is also provided on the side of the shoe plate 22 of the shoe support 2 away from the support plate, and a material channel for materials and slag to pass through is formed between the two shoe support shoes and at the bottom of the ball head. That is to say, due to the provision of the top cylinder 11, it is convenient to lower the height of the walking platform 7 and increase the space between it and the top of the tunnel, and with the provision of the bottom cylinder 13, it is convenient to increase the width of the material channel.

[0053] Of course, the gripper device in this embodiment may also adopt the tunnel boring machine gripper device in Embodiment 2 of the tunnel boring machine gripper device.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A roadheader shoe device, comprising a shoe, a return drive device, a meshing portion arranged at the end of a shoe cylinder, and a connecting portion fixedly arranged on the shoe and forming a spherical pair with the meshing portion, the shoe comprising an arc-shaped support plate and a shoe plate inside the support plate, the return drive device comprising an upper return drive device arranged above the connecting portion and a lower return drive device arranged below the connecting portion, characterized in that: The upper return drive device and / or the lower return drive device are arranged between the support plate and the shoe plate to form a built-in return drive device. The shoe plate is provided with perforations corresponding to the return drive devices one by one, and the perforations are used for the return drive device to transmit force to the meshing part.

2. The roadheader shoe device according to claim 1, characterized in that: One of the through holes is directly opposite to the built-in aligning driving device, so that the built-in aligning driving device is in abutment contact with the meshing portion through the through hole.

3. The roadheader shoe device according to claim 1 or 2, characterized in that: The built-in return drive device is a hydraulic cylinder.

4. The roadheader shoe device according to claim 3, characterized in that: A fixing plate is fixedly arranged inside the shoe plate, and the cylinder body of the built-in return driving device is fixedly connected to the fixing plate.

5. The roadheader shoe device according to claim 1 or 2, characterized in that: The support plate is provided with an inspection opening at a portion corresponding to the built-in return drive device, and an inspection cover is provided on the inspection opening.

6. The roadheader shoe device according to claim 1 or 2, characterized in that: The lower return driving device is hinged on the side of the shoe plate away from the support plate. A driving connecting rod hinged on the support shoe is arranged between the lower return driving device and the meshing part. One end of the driving connecting rod extends out of the shoe plate and is hingedly connected to the lower return driving device, and the other end extends between the shoe plate and the support plate and is used to apply force to the meshing part.

7. The roadheader shoe device according to claim 6, characterized in that: The driving connecting rod is in an angular shape, and one end of the driving connecting rod extends out of the shoe plate.

8. The roadheader shoe device according to claim 7, characterized in that: The lower return drive device is a hydraulic cylinder, which is arranged below the driving connecting rod and has a tendency to retract when the support shoe is in the return state.

9. The roadheader shoe device according to claim 6, characterized in that: The driving connecting rod is hingedly arranged on the shoe plate.

10. A roadheader, comprising two symmetrically arranged gripper shoe devices, a gripper shoe cylinder being arranged between the two gripper shoe devices, characterized in that: Each support shoe device is the same as the tunnel boring machine support shoe device described in any one of claims 1 to 9, and the meshing parts are respectively provided at both ends of the support shoe cylinder, and a walking platform is provided on the inner side of the support shoe and above the connecting part, and a material channel for materials and debris to pass through is formed between the two support shoes and at the bottom of the connecting part.

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