CN215419506U

CN215419506U - Cable erection fixing device

Info

Publication number: CN215419506U
Application number: CN202121919519.1U
Authority: CN
Inventors: 孙金澎; 刘建龙; 时艳杰; 赵金静
Original assignee: Zhongxin Hechuang Construction Group Co ltd
Current assignee: Zhongxin Hechuang Construction Group Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-04
Anticipated expiration: 2031-08-16

Abstract

The application relates to a cable erection fixing device, which belongs to the technical field of cable erection and comprises a fixing frame, wherein the fixing frame is arranged at the top end of a telegraph pole, a fixing column is fixedly arranged on the fixing frame, a fixing hole is formed in the side wall of the fixing column, an adjusting hole is also formed in the side wall of the fixing column, and the adjusting hole is communicated with the fixing hole; an adjusting column is connected in the adjusting hole in a sliding manner, and a limiting column is fixedly arranged on the side wall of the adjusting column; an accommodating groove is formed in the inner side wall of the adjusting hole, the limiting column is located in the accommodating groove, and a fixing assembly for fixing the limiting column at any position in the accommodating groove is arranged in the accommodating groove; one end of the adjusting column extends out of the adjusting hole and is positioned in the fixing hole, and one end of the adjusting column positioned in the fixing hole is fixedly connected with a fixing plate. This application has improved the commonality of fixed column and then improved the effect of cable erection fixing device's commonality.

Description

Cable erection fixing device

Technical Field

The application relates to the technical field of cable erection, in particular to a cable erection fixing device.

Background

A cable is a conductor made of one or more conductors insulated from each other and an outer insulating sheath that carries power or information from one location to another. The cable can be laid in overhead, underground, underwater, wall and tunnel modes. Among them, a cable erection fixture for fixing a cable is required when the cable is erected.

In the related art, the cable erection fixing device is arranged at the top end of the telegraph pole and comprises a fixing frame fixedly arranged at the top end of the telegraph pole, a fixing column is fixedly arranged on the fixing frame, and a fixing hole is formed in the side wall of the fixing column; when the erected cable is fixed, the cable penetrates through the fixing hole, and the effect of fixing the cable is achieved.

In view of the above-mentioned related technologies, the applicant believes that there is a defect that it is not convenient for the fixing column to be widely implemented and applied because the fixing column provided with the fixing hole adapted to the cable needs to be selected when fixing cables with different diameters.

SUMMERY OF THE UTILITY MODEL

In order to improve the commonality of fixed column and then improve cable erection fixing device's commonality, this application provides a cable erection fixing device.

The application provides a cable erection fixing device adopts following technical scheme:

a cable erection fixing device comprises a fixing frame, wherein the fixing frame is arranged at the top end of a telegraph pole, a fixing column is fixedly arranged on the fixing frame, a fixing hole is formed in the side wall of the fixing column, an adjusting hole is further formed in the side wall of the fixing column, and the adjusting hole is communicated with the fixing hole; an adjusting column is connected in the adjusting hole in a sliding manner, and a limiting column is fixedly arranged on the side wall of the adjusting column; an accommodating groove is formed in the inner side wall of the adjusting hole, the limiting column is located in the accommodating groove, and a fixing assembly for fixing the limiting column at any position in the accommodating groove is arranged in the accommodating groove; one end of the adjusting column extends out of the adjusting hole and is positioned in the fixing hole, and one end of the adjusting column positioned in the fixing hole is fixedly connected with a fixing plate.

By adopting the technical scheme, when the cable is erected, the cable on the ground is lifted to the fixing frame, one end of the cable penetrates through the fixing hole, and the cable is placed below the fixing plate; the adjusting column is pushed to slide towards the direction close to the cable, and drives the fixing plate and the limiting column to move until the fixing plate and the cable are tightly abutted; fix the restriction post through fixed subassembly, reached and fixed the effect to different diameter cables, improved cable erection fixing device's commonality.

Optionally, the fixing assembly includes a fixing spring and a fixing block; the fixed spring is fixedly arranged in the accommodating groove, and one end of the fixed spring close to the opening of the accommodating groove is fixedly connected with the fixed block; one end of the fixed block, which is far away from the fixed spring, is in a sawtooth shape, and the tooth tip direction is arranged downwards; the end face of the limiting column close to one end of the fixing block is arranged obliquely downwards, and one end of the limiting column close to the fixing block is inserted into the tooth groove of the end, far away from the fixing spring, of the fixing block.

By adopting the technical scheme, when the regulating post drives the limiting post to move, the end face of the limiting post, which is far away from one end of the regulating post, extrudes the fixing block and pushes the fixing block to slide towards the accommodating groove, and the fixing block extrudes the fixing spring and enables the fixing spring to be in a compressed state; until fixed plate and cable support tightly, the fixed block slides to the direction of keeping away from fixed spring under the effect of fixed spring resilience force, and the one end that the regulation post was kept away from to the restriction post this moment is inserted and is established in the tooth's socket, has accomplished the fixed to the restriction post, and the restriction post has reached the effect fixed to the fixed plate through adjusting the post, has made things convenient for the fixed to the cable, has improved the fixed efficiency to the cable.

Optionally, an unlocking hole is formed in the side wall of the fixed column, and the unlocking hole is communicated with the accommodating groove; the unlocking hole is connected with an unlocking plate in a sliding mode, one end of the unlocking plate is fixedly connected with the fixed block, and the end, far away from the fixed block, of the unlocking plate is located in the unlocking hole.

By adopting the technical scheme, when the cable is detached from the fixed column, the unlocking plate is pushed to slide towards the direction far away from the limiting column, and the unlocking plate drives the fixed block to slide towards the direction far away from the limiting column until the fixed block is separated from the limiting column; the pulling restriction post slides to the direction of keeping away from the cable until fixed plate and cable separation, has unblock the fixed to the cable, conveniently dismantles the cable from the fixed column.

Optionally, one end of the adjusting column, which is far away from the fixing plate, extends out of the adjusting hole and is fixedly connected with a reinforcing plate, a fastening spring is fixedly arranged between the reinforcing plate and the fixing column, and the fastening spring is always in a stretching state.

Through adopting above-mentioned technical scheme, the fastening spring of tensile state has applyed a power towards the cable for the reinforcing plate, and the reinforcing plate makes fixed plate and cable support tightly through adjusting the post, has reduced the possibility that the restriction post removed, and then makes the more firm that the cable is fixed.

Optionally, the terminal surface of adjusting the post and keeping away from fixed plate one end has been seted up and has been pressed from both sides tight hole, presss from both sides tight hole female connection and has the guide post, and the guide post bottom is rotated and is connected with and presss from both sides tight post, and the bottom that presss from both sides tight post sets firmly elastic clamping pad, presss from both sides tight pad and lies in the below of fixed plate.

Through adopting above-mentioned technical scheme, accomplish the fixed back to the restriction post through fixed subassembly, revolve to twist the guide post and make the guide post remove to the direction that is close to the fixed plate, the guide post promotes to press from both sides tight post and removes, presss from both sides tight post and drives and press from both sides tight pad and remove to make and press from both sides tight pad and cable support tightly, further fix the cable, and then make fixing device fixed more firm to the cable of different diameters.

Optionally, the clamping hole has a sliding groove on its inner side wall, and the clamping post has a sliding strip fixed on its side wall, which slides in the sliding groove.

Through adopting above-mentioned technical scheme, when the guide post promoted to press from both sides tight post and slided to the direction that is close to the cable, press from both sides tight post and drive the draw runner and slide in the spout, reduce the possibility that presss from both sides tight post and remove in non-vertical direction, reduced the possibility that presss from both sides tight pad and remove in non-vertical direction, and then make the tight pad of clamp fix more firmly to the cable.

Optionally, the fixing frame includes two positioning rods, two positioning bolts, and two positioning nuts; the two positioning rods are symmetrically arranged on two sides of the telegraph pole; two positioning bolts are respectively positioned on two sides of the telegraph pole, one end of each positioning bolt penetrates through the two positioning rods and is in threaded connection with the positioning nut, and the positioning nuts and the positioning rods are tightly abutted.

Through adopting above-mentioned technical scheme, when installing the mount to the wire pole, place two locating levers in the both sides of wire pole earlier, run through two locating levers and with set nut threaded connection in proper order with two positioning bolt respectively in the both sides of wire pole again, make set nut and locating lever support tightly, mount simple structure, easy to assemble has improved cable erection speed.

Optionally, a sliding hole is formed in the side wall of one of the positioning rods, two action plates are connected in the sliding hole in a sliding manner, and a clamping plate is fixedly arranged at one end, close to the telegraph pole, of each action plate; the two clamping plates are respectively positioned at two sides of the telegraph pole; and one end of the action plate, which is far away from the clamping plate, is provided with a clamping bolt, one end of the clamping bolt sequentially penetrates through the two action plates and is in threaded connection with a clamping nut, and the clamping nut and the action plates are tightly propped.

By adopting the technical scheme, the positioning rod provided with the sliding hole is placed on one side of the telegraph pole, and the two clamping plates are respectively positioned on the two sides of the telegraph pole; and then another positioning rod is placed on one side of the telegraph pole, which is far away from the positioning rod with the slippage hole, the fixing frame is installed, after the fixing frame is installed, the two clamping plates are respectively pushed to glide towards the direction close to the telegraph pole, one end of the clamping bolt sequentially penetrates through the two action plates and is in threaded connection with the clamping nut, the clamping nut and the action plates are tightly supported, at the moment, the two clamping plates are respectively tightly supported with the telegraph pole, and then the fixing frame and the telegraph pole are connected more firmly.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the fixing component is arranged to fix the limiting column at any position of the accommodating groove, the fixing component is used for fixing the fixing plate by fixing the limiting column, the fixing plate is tightly abutted against the cable, the effect of fixing cables with different diameters is achieved, and the universality of the cable erection fixing device is improved;

2. through setting up the clamp pad, further fix the cable, make fixing device fixed more firm to the cable of different diameters.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a partial cross-sectional view showing a fixing plate;

fig. 3 is a partial view showing a clamp bolt.

In the figure, 1, a fixed frame; 11. positioning a rod; 111. a sliding hole; 12. positioning the bolt; 13. positioning a nut; 2. a utility pole; 3. fixing a column; 31. a fixing hole; 311. a fixing plate; 32. an adjustment hole; 321. accommodating grooves; 33. unlocking the hole; 331. an unlocking plate; 4. an adjustment column; 41. a reinforcing plate; 42. a fastening spring; 43. a clamping hole; 431. a chute; 432. a slide bar; 5. a restraining post; 6. a fixing assembly; 61. fixing the spring; 62. a fixed block; 7. a guide post; 71. clamping the column; 72. a clamping pad; 8. an action plate; 81. a clamping plate; 9. clamping the bolt; 91. and (4) clamping the nut.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses cable erection fixing device.

Referring to fig. 1 and 2, a cable erection fixture comprises a fixing frame 1, wherein the fixing frame 1 is arranged at the top end of a telegraph pole 2, and a clamping assembly for clamping the telegraph pole 2 is arranged on the fixing frame 1; fixing columns 3 are fixedly arranged on two symmetrical sides of the fixing frame 1 relative to the telegraph pole 2 respectively, fixing holes 31 are formed in the side walls of the fixing columns 3, and the fixing holes 31 are horizontally arranged; the side wall of the fixed column 3 is also provided with an adjusting hole 32, the adjusting hole 32 is vertically arranged, and the adjusting hole 32 is communicated with the fixed hole 31; an adjusting column 4 is connected in the adjusting hole 32 in a sliding manner, one end of the adjusting column 4 is fixedly connected with an arc-shaped fixing plate 311, and the fixing plate 311 is positioned in the fixing hole 31; the fixed column 3 is provided with a propping mechanism for fixing the adjusting column 4 at any position in the adjusting hole 32.

When the cable is erected and fixed, the fixing frame 1 is fixedly arranged at the top end of the telegraph pole 2, and then the fixing frame 1 is further fixed through the clamping assembly, so that the fixing frame 1 and the telegraph pole 2 are connected more firmly; with subaerial cable lift to mount 1 on, make the one end of cable run through fixed orifices 31, after the cable position adjustment was accomplished, promote to adjust post 4 and slide to the direction that is close to the cable, adjust post 4 and drive fixed plate 311 and remove, support tightly until fixed plate 311 and cable, fix through supporting tight mechanism adjusting post 4, and then reached the fixed effect to fixed plate 311, reached and carried out the effect of fixing to different diameter cables, improved cable erection fixing device's commonality.

Referring to fig. 1 and 3, the fixing frame 1 includes two positioning rods 11, two positioning bolts 12, and two positioning nuts 13, and two ends of each positioning rod 11 are fixedly connected to one fixing column 3 through bolts; the clamping assembly comprises an acting plate 8, two clamping plates 81, two clamping bolts 9 and two clamping nuts 91, wherein the two acting plates 8 and the two clamping plates 81 are provided, and the clamping plates 81 are arc-shaped clamping plates 81; the two positioning rods 11 are horizontally arranged on two sides of the telegraph pole 2 and attached to the telegraph pole 2, and the two positioning rods 11 are parallel to each other; the two positioning bolts 12 are horizontally arranged on two sides of the telegraph pole 2, and the two positioning bolts 12 are parallel to each other and are both vertical to the positioning rods 11; one end of the positioning bolt 12 penetrates through the two positioning rods 11 in sequence and is in threaded connection with the positioning nut 13, and the positioning nut 13 is tightly abutted to the positioning rods 11. A sliding hole 111 is formed in the side wall of one of the positioning rods 11, the two acting plates 8 are connected in the sliding hole 111 in a sliding manner, one end, close to the telegraph pole 2, of each acting plate 8 is fixedly connected with the clamping plate 81, the surfaces, opposite to the two clamping plates 81, of each acting plate 8 are concave, and the telegraph pole 2 is located between the surfaces, opposite to the two clamping plates 81, of each clamping plate 81; the clamping bolt 9 penetrates through one end of the two acting plates 8 far away from the telegraph pole 2 and is in threaded connection with the clamping nut 91, and the clamping nut 91 is tightly abutted against the acting plates 8.

When the fixing frame 1 is installed on the telegraph pole 2, the two positioning rods 11 are respectively placed on two sides of the telegraph pole 2, and then the two positioning bolts 12 sequentially penetrate through the two positioning rods 11 and are in threaded connection with the positioning nuts 13; the two action plates 8 are respectively pushed to slide towards the direction close to the telegraph pole 2, and the action plates 8 drive the clamping plate 81 to slide towards the direction close to the telegraph pole 2 until the clamping plate 81 is attached to the telegraph pole 2; and one end of a clamping bolt 9 sequentially penetrates through the two action plates 8 and is in threaded connection with the clamping nut 91, so that the clamping nut 91 and the action plates 8 are tightly abutted, and the fixed column 3 is fixedly arranged on the telegraph pole 2 through the fixed frame 1 and the clamping assembly, so that the fixed column 3 is more firmly fixed.

Referring to fig. 2 and 3, the abutting mechanism comprises a limiting column 5 and a fixing component 6, wherein the limiting column 5 is horizontally and fixedly arranged on the side wall of the adjusting column 4; an accommodating groove 321 is formed in the inner side wall of the adjusting hole 32, and the accommodating groove 321 is horizontally arranged; the fixing assembly 6 is disposed in the receiving groove 321, the limiting column 5 is disposed in the receiving groove 321, and the fixing assembly 6 fixes the limiting column 5 at any position of the receiving groove 321. The fixing component 6 comprises a fixing spring 61 and a fixing block 62, wherein the fixing spring 61 is always in a compressed state; one end of the fixed spring 61 is fixedly connected with the inner wall of the accommodating groove 321 far away from the opening of the fixed spring, and the other end of the fixed spring 61 is fixedly connected with the fixed block 62; one end of the fixed block 62, which is far away from the fixed spring 61, is in a sawtooth shape with the tooth tip direction facing downwards; the end face of one end, far away from the adjusting column 4, of the limiting column 5 is arranged obliquely downwards, and one end, far away from the adjusting column 4, of the limiting column 5 is inserted into a tooth groove formed in one end, far away from the fixing spring 61, of the fixing block 62. The fixed column 3 is horizontally provided with an unlocking hole 33, and the unlocking hole 33 is communicated with the accommodating groove 321; an unlocking plate 331 is arranged in the unlocking hole 33, one end of the unlocking plate 331 is fixedly connected with the fixed block 62, and the unlocking plate 331 slides in the unlocking hole 33.

When the cable is fixed in the fixing hole 31, the adjusting column 4 is pushed to move downwards, and the adjusting column 4 drives the fixing plate 311 and the limiting column 5 to move downwards; when the limiting column 5 moves downwards, one end of the limiting column 5, which is far away from the adjusting column 4, extrudes the fixing block 62 and enables the fixing block 62 to slide towards the accommodating groove 321; until the fixing plate 311 abuts against the cable tightly, the adjusting column 4 stops being pushed, the fixing block 62 slides in the direction away from the fixing spring 61 under the effect of the resilience force of the fixing spring 61 until the limiting column 5 is inserted into the tooth groove, the fixing of the fixing assembly 6 on the limiting column 5 is completed, and then the fixing of the fixing plate 311 is completed. When taking out the cable from the fixed orifices 31, promote unlocking plate 331 and slide to the direction of keeping away from restriction post 5, until restriction post 5 and the separation of fixed block 62, the vertical rebound of pulling regulation post 4 makes fixed plate 311 and cable separation, takes out the cable from fixed orifices 31 again, has reached the effect that makes things convenient for the installation and the dismantlement of cable.

Referring to fig. 2, a reinforcing plate 41 is fixedly arranged at one end of the adjusting column 4 away from the fixing plate 311, and the reinforcing plate 41 is horizontally arranged; a fastening spring 42 is arranged between the reinforcing plate 41 and the fixed column 3, and the fastening spring 42 is sleeved on the adjusting column 4; one end of the fastening spring 42 is fixedly connected with the reinforcing plate 41, the other end of the fastening spring 42 is fixedly connected with the fixed column 3, and the fastening spring 42 is always in a stretching state. The upper surface of the adjusting column 4 is provided with a clamping hole 43, and the clamping hole 43 penetrates through the reinforcing plate 41; a guide post 7 is arranged in the clamping hole 43, one end of the guide post 7 is in threaded connection with the inner wall of the clamping hole 43, and the other end of the guide post 7 extends out of the clamping hole 43; the bottom end of the guide post 7 is rotatably connected with a clamping post 71, the bottom end of the clamping post 71 is fixedly connected with a clamping pad 72 made of rubber, and the clamping pad 72 is positioned below the fixing plate 311; the side wall of the clamping column 71 is vertically and fixedly provided with a sliding strip 432, a sliding groove 431 is vertically formed in the clamping hole 43, and the sliding strip 432 slides in the sliding groove 431.

After the fixing of the fixing plate 311 is completed, the guide post 7 is screwed, so that the guide post 7 moves vertically downwards, the guide post 7 pushes the clamping post 71 to move vertically downwards, and the clamping post 71 drives the sliding strip 432 to slide in the sliding groove 431; the guide post 7 stops being screwed until the clamping post 71 drives the clamping pad 72 to move to be tightly abutted against the cable, so that the fixing device can fix cables with different diameters more firmly.

The implementation principle of the cable erection fixing device in the embodiment of the application is as follows: when the cable is erected and fixed, the cable penetrates through the fixing hole 31, then the adjusting column 4 is pushed to vertically move downwards, the adjusting column 4 drives the limiting column 5 and the fixing plate 311 to move downwards, meanwhile, the adjusting column 4 also drives the clamping pad 72 to move downwards, and the adjusting column 4 is stopped being pushed until the clamping pad 72 and the cable are tightly abutted; when the limiting column 5 moves downwards, one end of the limiting column 5, which is far away from the adjusting column 4, pushes the fixing block 62 to slide towards the accommodating groove 321, and after the pushing of the adjusting column 4 is stopped, the fixing block 62 slides towards the direction far away from the fixing spring 61 under the action of the resilience force of the fixing spring 61 until the limiting column 5 is inserted into the tooth groove of the fixing block 62, so that the fixing of the fixing plate 311 is completed; and then the guide post 7 is screwed, the guide post 7 pushes the clamping pad 72 and the cable tightly through the clamping post 71, and the cable is further fixed, so that the fixing device can fix cables with different diameters more firmly.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cable erection fixing device, includes mount (1), and mount (1) sets up on the top of wire pole (2), has set firmly fixed column (3), its characterized in that on mount (1): the side wall of the fixing column (3) is provided with a fixing hole (31), the side wall of the fixing column (3) is also provided with an adjusting hole (32), and the adjusting hole (32) is communicated with the fixing hole (31); the adjusting hole (32) is connected with an adjusting column (4) in a sliding way, and the side wall of the adjusting column (4) is fixedly provided with a limiting column (5); an accommodating groove (321) is formed in the inner side wall of the adjusting hole (32), the limiting column (5) is located in the accommodating groove (321), and a fixing assembly (6) for fixing the limiting column (5) at any position in the accommodating groove (321) is arranged in the accommodating groove (321); one end of the adjusting column (4) extends out of the adjusting hole (32) and is positioned in the fixing hole (31), and one end of the adjusting column (4) positioned in the fixing hole (31) is fixedly connected with a fixing plate (311).

2. A cable erection fixture as claimed in claim 1, wherein: the fixing component (6) comprises a fixing spring (61) and a fixing block (62); the fixed spring (61) is fixedly arranged in the accommodating groove (321), and one end of the fixed spring (61) close to the opening of the accommodating groove (321) is fixedly connected with the fixed block (62); one end of the fixed block (62) far away from the fixed spring (61) is in a sawtooth shape, and the tooth tip direction is arranged downwards; the end face of one end, close to the fixed block (62), of the limiting column (5) is arranged obliquely downwards, and one end, close to the fixed block (62), of the limiting column (5) is inserted into a tooth groove of one end, far away from the fixed spring (61), of the fixed block (62).

3. A cable erection fixture as claimed in claim 2, wherein: an unlocking hole (33) is formed in the side wall of the fixed column (3), and the unlocking hole (33) is communicated with the accommodating groove (321); the unlocking hole (33) is connected with an unlocking plate (331) in a sliding mode, one end of the unlocking plate (331) is fixedly connected with the fixed block (62), and one end, far away from the fixed block (62), of the unlocking plate (331) is located in the unlocking hole (33).

4. A cable erection fixture as claimed in claim 1, wherein: one end, far away from the fixed plate (311), of the adjusting column (4) extends out of the adjusting hole (32) and is fixedly connected with a reinforcing plate (41), a fastening spring (42) is fixedly arranged between the reinforcing plate (41) and the fixed column (3), and the fastening spring (42) is always in a stretching state.

5. A cable erection fixture as claimed in claim 1, wherein: the end face, far away from fixed plate (311), of adjusting post (4) has been seted up and has been pressed from both sides tight hole (43), presss from both sides tight hole (43) female connection and has guide post (7), and guide post (7) bottom is rotated and is connected with and presss from both sides tight post (71), and the bottom that presss from both sides tight post (71) sets firmly elastic clamp pad (72), presss from both sides tight pad (72) and is located the below of fixed plate (311).

6. A cable erection fixture as claimed in claim 5, wherein: the inside wall of the clamping hole (43) is provided with a sliding groove (431), the side wall of the clamping column (71) is fixedly provided with a sliding strip (432), and the sliding strip (432) slides in the sliding groove (431).

7. A cable erection fixture as claimed in claim 1, wherein: the fixing frame (1) comprises two positioning rods (11), two positioning bolts (12) and two positioning nuts (13); the two positioning rods (11) are symmetrically arranged on two sides of the telegraph pole (2); two positioning bolts (12) are respectively located the both sides of wire pole (2), and the one end of positioning bolt (12) runs through two locating levers (11) and with set nut (13) threaded connection, set nut (13) and locating lever (11) support tightly.

8. A cable erection fixture as claimed in claim 7, wherein: a sliding hole (111) is formed in the side wall of one positioning rod (11), two action plates (8) are connected in the sliding hole (111) in a sliding manner, and a clamping plate (81) is fixedly arranged at one end, close to the telegraph pole (2), of each action plate (8); the two clamping plates (81) are respectively positioned at two sides of the telegraph pole (2); clamping bolts (9) are arranged at the ends, far away from the clamping plates (81), of the action plates (8), one ends of the clamping bolts (9) sequentially penetrate through the two action plates (8) and are in threaded connection with clamping nuts (91), and the clamping nuts (91) are tightly abutted against the action plates (8).