Connecting piece for coal mine tunnel support

Abstract

The connecting piece comprises a connecting sleeve and two clamping parts, the two ends of the connecting sleeve are movably connected with the clamping parts respectively, each clamping part comprises a connecting rod assembled with the connecting sleeve, a rotating piece is hinged to the top of each connecting rod, the top of each rotating piece is movably connected with a clamping piece, and a threaded through hole is formed in one side of each clamping piece. And a fastening bolt is assembled in the threaded through hole. The support is clamped by the clamping parts, and the two clamping parts are connected by the connecting sleeve, so that the aim of mounting the connecting piece without punching holes in the coal mine tunnel support is fulfilled.

Description

Technical Field

[0001] The utility model belongs to the technical field of accessories for coal mine roadway supports, and particularly relates to a connecting piece for coal mine roadway supports. Background Technique

[0002] Coal mine roadway support connecting pieces are key components used to connect and fix coal mine roadway supports, which ensure the stability and safety of the support system.

[0003] In order to increase the safety and firmness of the support, the legs of some supports are made of I-beams. To install the connecting piece, installation holes are usually drilled in the I-beam, and the connecting piece is fixed to the I-beam with bolts. However, drilling holes in the I-beam will damage the strength of the support, affecting the overall safety of the coal mine roadway support. And because the ground of the coal mine roadway is not very flat during excavation, when installing two adjacent supports, it cannot be guaranteed that they are on the same horizontal plane. If installation holes are reserved on the I-beam, it will cause the installation holes to misalign, affecting the installation. Therefore, it is necessary to design a connecting piece for coal mine roadway supports. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting piece for coal mine roadway supports to solve the problems in the above background technique that drilling holes in the support will damage the strength of the support, affecting the overall safety of the coal mine roadway support, and because the ground of the coal mine roadway is not very flat during excavation, when installing two adjacent supports, it cannot be guaranteed that they are on the same horizontal plane. If installation holes are reserved on the support, it will cause the installation holes to misalign, affecting the installation.

[0005] To solve the above problems, the specific technical solution of a connecting piece for coal mine roadway supports of the utility model is as follows:

[0006] A connecting piece for coal mine roadway supports includes a connecting sleeve and two clamping parts. The two clamping parts are respectively movably connected to both ends of the connecting sleeve. The clamping part includes a connecting rod that is fitted with the connecting sleeve. A rotating part is hinged to the top of the connecting rod. A clamping piece is movably connected to the top of the rotating part. A threaded through hole is provided on one side of the clamping piece, and a fastening bolt is fitted in the threaded through hole.

[0007] Further, a rotating shaft is provided at the top of the rotating part, a limiting part is provided at the top of the rotating shaft, a shaft hole adapted to the rotating shaft is provided at the bottom of the clamping piece, and a limiting cavity adapted to the limiting part is provided inside the shaft hole.

[0008] Further, the limiting part is a cylinder.

[0009] Further, anti-slip convex strips are provided on the contact surface between the clamping piece and the coal mine roadway support, and the cross-section of the anti-slip convex strip is triangular.

[0010] Furthermore, several anti-slip ridges are linearly arrayed.

[0011] Furthermore, a pressing plate is fixedly provided at the bottom end of the fastening bolt.

[0012] Furthermore, screws are provided on the inner surface of the connecting sleeve, and the screws at both ends are reverse threads of each other. Threads matching the screws are provided on the outer surface of the connecting rod.

[0013] Furthermore, the fastening bolt is an external hexagon bolt.

[0014] Furthermore, a screwing member is fixedly provided on the outer surface of the connecting sleeve.

[0015] Furthermore, the screwing member is in the shape of an external hexagon and has the same size as the hexagon head of the fastening bolt.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] During use, if the distance between two adjacent I-beams is less than the opening distance of the clamping member, the clamping members on the clamping part can directly connect the two adjacent I-beams together without drilling holes in the I-beams for assembling screws, thus avoiding affecting the overall strength of the I-beams. Moreover, one clamping part can be installed at the top and bottom of the I-beam respectively, and then the two clamping parts can be connected together through the connecting sleeve, which can better increase the stability and safety of the support system. If the distance between two adjacent I-beams is greater than the opening distance of the clamping member, one clamping part can clamp the side wall of one I-beam, and another clamping part can clamp the side wall of the adjacent I-beam, and then the two clamping parts can be connected together through the connecting sleeve. The hinge connection between the connecting rod and the rotating member and the movable connection between the rotating member and the clamping member can realize the multi-angle installation of the clamping part. While achieving the purpose of not drilling holes for assembling connecting pieces, it not only increases the integrity and firmness of the support, but also increases the usage scenarios of the connecting piece, improving the practicality of the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the usage state of the connecting piece when the distance between two adjacent I-beams in the embodiment of the present utility model is less than the opening distance of the clamping member;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the usage state of the connecting piece when the distance between two adjacent I-beams in the embodiment of the present utility model is greater than the opening distance of the clamping member;

[0020] Figure 3 It is an exploded view of the assembly of the connecting sleeve and two clamping parts in the embodiment of the present utility model;

[0021] Figure 4Exploded assembly view of the rotating member and the clamping member in the embodiment of the present utility model;

[0022] Figure 5 Schematic perspective view of the connecting rod in the embodiment of the present utility model;

[0023] Figure 6 Schematic perspective view of the rotating member in the embodiment of the present utility model;

[0024] Figure 7 Schematic perspective view of the clamping member in the embodiment of the present utility model;

[0025] Reference numerals:

[0026] 1. Connecting sleeve; 101. Screwing member;

[0027] 2. Clamping portion; 201. Connecting rod; 202. Rotating member; 2021. Rotating shaft; 2022. Limiting member; 203. Clamping member; 2031. Shaft hole; 2032. Limiting chamber; 2033. Anti-slip rib; 204. Fastening bolt; 2041. Pressing plate. Detailed implementation manners

[0028] In order to better understand the purpose, structure and function of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings.

[0029] Embodiment, referring to Figures 1 to 7 , this embodiment discloses a connecting member for a coal mine roadway support, including a connecting sleeve 1 and two clamping portions 2. The two ends of the connecting sleeve 1 are respectively movably connected with the clamping portions 2. The clamping portion 2 includes a connecting rod 201 adapted to the connecting sleeve 1. The top of the connecting rod 201 is hinged with a rotating member 202. The top of the rotating member 202 is movably connected with a clamping member 203. A threaded through hole is provided on one side of the clamping member 203. A fastening bolt 204 is fitted in the threaded through hole. By screwing the fastening bolt 204, the clamping member 203 can be fixed on the support, and the two clamping portions 2 are connected together through the connecting sleeve 1.

[0030] A rotating shaft 2021 is provided at the top of the rotating member 202, and a limiting member 2022 is provided at the top end of the rotating shaft 2021. A shaft hole 2031 adapted to the rotating shaft 2021 is provided at the bottom of the clamping member 203. A limiting chamber 2032 adapted to the limiting member 2022 is provided inside the shaft hole 2031. The rotating member 202 rotates in the shaft hole 2031 through the rotating shaft 2021 to adjust the clamping angle of the clamping member 203, and the limiting member 2022 is restricted in the limiting chamber 2032 to prevent the rotating member 202 from falling off the clamping member 203.

[0031] The limiting member 2022 is a cylinder, which makes the rotating member 202 rotate more smoothly.

[0032] Anti-slip ridges 2033 are provided on the contact surface between the clamping member 203 and the coal mine roadway support. Several anti-slip ridges 2033 are distributed in a linear array. The cross-section of the anti-slip ridge 2033 is triangular, which prevents the clamping member 203 from sliding when clamping the I-beam, and the anti-slip function makes the clamping more firm.

[0033] A pressing plate 2041 is fixedly provided at the bottom end of the fastening bolt 204, which increases the contact area between the fastening bolt 204 and the coal mine roadway support and enhances the fastening effect.

[0034] Threads are provided on the inner surface of the connecting sleeve 1, and the threads at both ends are reverse threads. Threads matching the threads are provided on the outer surface of the connecting rod 201. With the design of reverse threads, when the connecting sleeve 1 is screwed, the two connecting rods 201 threadedly connected to both ends of the connecting sleeve 1 can move closer to each other simultaneously or move away from each other simultaneously. By screwing the connecting sleeve 1, the purpose of tightening or loosening the connecting member can be achieved.

[0035] The fastening bolt 204 is an external hexagonal bolt. A screwing member 101 is fixedly provided on the outer surface of the connecting sleeve 1. The screwing member 101 is in the shape of an external hexagon and has the same size as the hexagonal head of the fastening bolt 204, which reduces the number of tools carried by the installation workers and lightens the burden.

[0036] Working principle: During use, if the distance between two adjacent I-beams is less than the opening distance of the clamping member 203, the clamping member 203 on the clamping part 2 can directly connect the two adjacent I-beams together without drilling holes in the I-beams to assemble screws, avoiding affecting the overall strength of the I-beams. And one clamping part 2 can be installed at the top and bottom of the I-beam respectively, and then the two clamping parts 2 are connected together through the connecting sleeve 1. If the distance between two adjacent I-beams is greater than the opening distance of the clamping member 203, one clamping part 2 can clamp the side wall of the I-beam, and another clamping part 2 can clamp the side wall of the adjacent I-beam, and then the two clamping parts 2 are connected together through the connecting sleeve 1. The hinge connection between the connecting rod 201 and the rotating member 202 and the movable connection between the rotating member 202 and the clamping member 203 can realize the multi-angle installation of the clamping part 2.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A connecting piece for a coal mine roadway support, characterized in that: It includes a connecting sleeve (1) and two clamping parts (2). The two clamping parts (2) are movably connected to both ends of the connecting sleeve (1) respectively. The clamping part (2) includes a connecting rod (201) fitted with the connecting sleeve (1). A rotating part (202) is hinged to the top of the connecting rod (201). A clamping part (203) is movably connected to the top of the rotating part (202). A threaded through hole is provided on one side of the clamping part (203), and a fastening bolt (204) is fitted in the threaded through hole.

2. The connecting piece for a coal mine roadway support according to claim 1, characterized in that, A rotating shaft (2021) is provided at the top of the rotating part (202). A limiting part (2022) is provided at the top end of the rotating shaft (2021). A shaft hole (2031) adapted to the rotating shaft (2021) is provided at the bottom of the clamping part (203). A limiting cavity (2032) adapted to the limiting part (2022) is provided inside the shaft hole (2031).

3. The connecting piece for a coal mine roadway support according to claim 2, wherein, The limiting part (2022) is a cylinder.

4. The connecting piece for a coal mine roadway support according to claim 1, characterized in that, Anti-slip ridges (2033) are provided on the contact surface between the clamping part (203) and the coal mine roadway support. The cross-section of the anti-slip ridges (2033) is triangular.

5. The connecting piece for a coal mine roadway support according to claim 4, characterized in that, Several anti-slip ridges (2033) are distributed in a linear array.

6. The connecting piece for a coal mine roadway support according to claim 1, characterized in that A pressing plate (2041) is fixedly provided at the bottom end of the fastening bolt (204).

7. The connecting piece for a coal mine roadway support according to claim 1, characterized in that, Threads are provided on the inner surface of the connecting sleeve (1), and the threads at both ends are reverse threads. Threads adapted to the threads are provided on the outer surface of the connecting rod (201).

8. The connecting piece for a coal mine roadway support according to claim 1, characterized in that, The fastening bolt (204) is an external hexagonal bolt.

9. The connecting piece for a coal mine roadway support according to claim 8, characterized in that, A screwing part (101) is fixedly provided on the outer surface of the connecting sleeve (1).

10. The connecting piece for a coal mine roadway support according to claim 9, characterized in that, The screwing part (101) is in the shape of an external hexagon and has the same size as the hexagonal head of the fastening bolt (204).

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