CN114920085A

CN114920085A - Pay-off based on electric power engineering

Info

Publication number: CN114920085A
Application number: CN202210570485.2A
Authority: CN
Inventors: 刘兵; 丁欣; 穆明亮; 赵恒伟; 李培豪; 杨少辉; 王俊昌; 李蓬; 李飞; 王洪礼; 成印健; 韩哲; 盖凯凯
Original assignee: State Grid Shandong Electric Power Co Ltd
Current assignee: State Grid Shandong Electric Power Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-08-19

Abstract

The invention relates to the field of electric power engineering, in particular to a paying-off device based on electric power engineering, which comprises a chassis, wherein an extending claw extends from the edge of the front end of the chassis, a lifting piece is arranged in the middle of the upper end of the chassis, a pushing piece is arranged at the rear end of the lifting piece, a supporting piece is arranged in the middle of the upper end surface of the extending claw in a penetrating manner, the pushing piece is attached to the supporting piece, a moving wheel is arranged at the edge of the lower end surface of the extending claw, and a supporting piece is arranged at the front end of the lifting piece. The invention can save more labor when installing and replacing the winding disc, can adapt to the winding discs with different inner diameters, can save more labor when paying off, and can ensure the stability when paying off.

Description

Pay-off based on electric power engineering

Technical Field

The invention relates to the field of electric power engineering, in particular to a pay-off device based on electric power engineering.

Background

In the construction process of electric power engineering, a paying-off device is usually needed to assist the cable wound on a winding disc to be loosened for paying-off, however, when the winding disc is installed and replaced on the paying-off device, the winding disc needs to be lifted up manually to be placed on the device for installation or replacement, the process is quite laborious, and labor is not saved when the winding disc is installed and replaced.

Disclosure of Invention

The invention aims to solve the defects in the background art and provides a pay-off device based on electric power engineering.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a pay-off based on electric power engineering, includes the chassis, the front end edge of chassis extends has and stretches out the claw, the upper end mid-mounting of chassis has the promotion piece, the rear end of promoting the piece is installed and is pushed away the piece, the up end middle part that stretches out the claw runs through and installs support piece, it laminates with support piece mutually to push away the piece, the lower terminal surface edge that stretches out the claw is installed and is removed the wheel, the support piece is installed to the front end that promotes the piece.

Preferably, the lifting member includes the bearing frame of fixed mounting at the up end middle part of chassis, rotate between the inside top surface of bearing frame and the up end of chassis and install the promotion double-screw bolt, the upper end fixed mounting who promotes the double-screw bolt has No. three hand wheels, the axial lead of No. three hand wheels and the axial lead collineation that promotes the double-screw bolt, the outside that promotes the double-screw bolt is screwed and is promoted the thread bush, the surface symmetry that promotes the thread bush extends has two sets of connecting blocks, and is two sets of the tip of connecting block is inlayed respectively and is had two sets of sliding frames, the sliding frame is laminated in the surface of bearing frame.

Preferably, the support piece comprises a fixing seat extending at the front ends of the two groups of sliding frames, an adjusting stud is rotatably mounted in the middle of the front end of the fixing seat, three groups of fixing columns are arranged on an outer side annular array of the adjusting stud, one ends of the fixing columns are fixedly connected with the front ends of the fixing seat, three groups of fixing columns are embedded into the outer surfaces of the fixing columns respectively, two groups of bearing rings are located on the outer side of the adjusting stud, one group of bearing rings are located in front of the other group of bearing rings, a fixing disc is fixedly mounted at the other end of each fixing column, and the adjusting stud is rotatably embedded into the fixing disc.

Preferably, the tip fixed mounting of adjusting the double-screw bolt has No. two hand wheels, the surface of adjusting the double-screw bolt is screwed and is had the regulation thread bush, it is located between two sets of carrier rings to adjust the thread bush, and is two sets of the equal ring array in surface of carrier ring extends the directional cover of multiunit, multiunit the inside of directional cover is laminated respectively and is installed multiunit orientation pole, multiunit the multiunit gyro wheel is installed respectively to the tip of orientation pole.

Preferably, the multiunit the tip of directional pole fixed mounting respectively has the multiunit wheel carrier, the gyro wheel is installed in the inside of wheel carrier, wherein is located two sets of on the collinear inlay between the wheel carrier has the synchronizing bar, wherein is located the rear the preceding terminal surface extension of the wheel carrier on the carrier ring has a concave block No. one, the surface annular array of adjusting the thread bush extends and has No. two concave blocks of three groups, it links solid frame to rotate to be connected with between No. two concave blocks and a concave block, it is the slope setting to link solid frame.

Preferably, the pushing part comprises a stretching seat fixedly installed on the lower portion of the rear end of the bearing frame, a pushing stud is installed below the stretching seat, a frame body is screwed on the outer side of the pushing stud, a reinforcing frame is extended to the side face of the bearing frame, the end portion of the reinforcing frame is fixedly connected with the upper end face of the bottom frame, the stretching claw and the bottom frame are integrally formed, a reinforcing plate is obliquely extended to the lower portion of the front end of the reinforcing frame, the end portion of the reinforcing plate is fixedly connected with the upper end face of the stretching claw, and the frame body is sequentially laminated on the rear end face of the reinforcing frame and the rear end face of the reinforcing plate.

Preferably, the rear end face middle part that stretches out the seat extends and has born the seat, promote the double-screw bolt to run through to rotate and inlay in the inside of bearing the seat, the rear end fixed mounting who promotes the double-screw bolt has a hand wheel No. one, the axial lead of hand wheel and the axial lead collineation that promotes the double-screw bolt, bear the seat and stretch out a integrated into one piece, the rear end face of reinforcing frame all runs through with the rear end face of reinforcing plate and has seted up the square hole, the framework is laminated in the inside of square hole.

Preferably, support piece runs through two sets of guide posts of installing at the upper end middle part of stretching out the claw including the symmetry laminating, and is two sets of the equal fixed mounting of lower extreme of guide post has a bridge, it is located the below of stretching out the claw, and is two sets of the upper end of guide post is all inlayed and is had the pressure cap, the axial lead of pressure cap and the axial lead collineation of guide post, it is located the top of stretching out the claw to press the cap, the outside winding of guide post has reset spring, reset spring is located the upper end of stretching out the claw and presses between the lower extreme of cap, two sets of indent have been seted up to the lower terminal surface of framework, the inside up end of indent is opened and is established to the inclined plane, the up end of pressure cap is laminated with the inside up end of indent mutually.

Compared with the prior art, the invention has the following beneficial effects:

1. through the promotion piece that sets up, can promote the chassis to the rear of wire reel, the wire reel is located between two sets of claws that stretch out this moment, adjust the double-screw bolt and get into the wire reel, rotate afterwards and grab three numbers hand wheels and rotate the promotion double-screw bolt, in order to order about to screw and shift up at the promotion thread bush that promotes on the double-screw bolt, and then drive and adjust the double-screw bolt and shift up and hold up the wire reel, with this installation to the wire reel of completion, otherwise can take off the wire reel and change, the phenomenon that needs the manual work to lift up the wire reel in having avoided change and the installation, need not the weight of artifical wire reel when having ensured to change and installing promptly, it is more laborsaving to make when changing and installing the wire reel.

2. Through the support piece that sets up, can directly grab No. two hand wheels and rotate, and then drive the regulation double-screw bolt and rotate, it promotes even solid frame to order about the regulation thread bush of screwing on the regulation double-screw bolt to remove, it promotes to the frame to order about even solid frame emergence slope, the orientation pole slides in orientation cover this moment, in order to assist gyro wheel inwards or outside removal, adjust simultaneously with the interval between the gyro wheel to on the same circumference, with this wire reel that adapts to different internal diameters, and when rotating with the unwrapping wire to the wire reel, the gyro wheel can roll, with reduce and the wire reel between frictional force, apply the power on the wire reel when reducing the rotation promptly, make more laborsaving when the unwrapping wire.

3. Support piece through setting up, can rotate in order to drive the framework at the reinforcing frame to promoting the double-screw bolt, slide the antedisplacement in the square hole on the reinforcing plate, promote to pressing the cap with utilizing the indent in the framework, move down with ordering about to press the cap, and then drive a bridge and move down and contact with ground, the bridge that moves down simultaneously will stretch out the removal wheel jack-up on the claw and break away from ground, support the device with replacing the removal wheel through a bridge, in order to ensure that the unwrapping wire in-process the device can not appear removing the phenomenon, the effectual steadiness when having guaranteed the unwrapping wire promptly.

Drawings

FIG. 1 is a schematic structural diagram of a pay-off device based on electric power engineering according to the present invention;

FIG. 2 is a schematic view of a fixing seat of a pay-off device based on electrical engineering according to the present invention;

FIG. 3 is a schematic diagram of an adjusting stud of a pay-off device based on electric power engineering;

FIG. 4 is a schematic view of the position of an extending seat of a pay-off device based on electric power engineering;

FIG. 5 is a schematic view of another perspective of the extension base of the pay-off device based on electrical engineering according to the present invention;

fig. 6 is a schematic view of a branch bridge of a pay-off device based on electric power engineering.

In the figure: 1. a chassis; 2. extending the claw; 3. a branch bridge; 4. a reinforcing frame; 5. a carrying frame; 6. lifting the stud; 7. a fixed seat; 8. a protruding seat; 9. adjusting the stud; 10. pushing the stud; 11. a bearing seat; 12. a frame body; 13. a reinforcing plate; 14. a first hand wheel; 15. lifting the threaded sleeve; 16. a sliding frame; 17. fixing a column; 18. a load ring; 19. pressing a groove; 20. pressing the cap; 21. a return spring; 22. a guide post; 23. an orientation sleeve; 24. an orientation bar; 25. a wheel carrier; 26. a roller; 27. a first concave block; 28. a connecting and fixing frame; 29. a second concave block; 30. adjusting the threaded sleeve; 31. a synchronization rod; 32. fixing the disc; 33. a second hand wheel; 34. connecting blocks; 35. a third hand wheel; 36. the wheel is moved.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1-6, the paying-off device based on the electric power engineering comprises a base frame 1, wherein an extending claw 2 extends from the edge of the front end of the base frame 1, a lifting piece is installed in the middle of the upper end of the base frame 1, a pushing piece is installed at the rear end of the lifting piece, a supporting piece is installed in the middle of the upper end face of the extending claw 2 in a penetrating mode, the pushing piece is attached to the supporting piece, a moving wheel 36 is installed at the edge of the lower end face of the extending claw 2, and a supporting piece is installed at the front end of the lifting piece.

The lifting part comprises a bearing frame 5 fixedly installed at the middle part of the upper end face of the chassis 1, a lifting stud 6 is installed between the inner top face of the bearing frame 5 and the upper end face of the chassis 1 in a rotating mode, a third hand wheel 35 is fixedly installed at the upper end part of the lifting stud 6, the axial lead of the third hand wheel 35 is collinear with the axial lead of the lifting stud 6, the third hand wheel 35 plays a role in facilitating rotation of the lifting stud 6, a lifting threaded sleeve 15 is screwed outside the lifting stud 6, two groups of connecting blocks 34 are symmetrically extended from the outer surface of the lifting threaded sleeve 15, the connecting blocks 34 play a role in connection and fixation, two groups of sliding frames 16 are respectively embedded at the end parts of the two groups of connecting blocks 34, the sliding frames 16 are attached to the outer surface of the bearing frame 5, and the matching between the sliding frames 16 and the bearing frame 5 plays roles in guiding and bearing capacity.

The support piece comprises a fixing seat 7 extending at the front ends of two groups of sliding frames 16, an adjusting stud 9 is rotatably mounted in the middle of the front end of the fixing seat 7, three groups of fixing columns 17 are arranged on the outer side of the adjusting stud 9 in an annular array mode, one end of each fixing column 17 is fixedly connected with the front end of the fixing seat 7, each fixing column 17 plays a role in fixing a bearing ring 18 and a fixing disc 32, two groups of bearing rings 18 are respectively inlaid in the outer surfaces of the three groups of fixing columns 17, each bearing ring 18 is located on the outer side of the adjusting stud 9, one group of bearing rings 18 is located in front of the other group of bearing rings 18, a fixing disc 32 is fixedly mounted at the other end of each fixing column 17, each bearing ring 18 plays a role in bearing the orientation sleeve 23, each fixing disc 32 plays a role in limiting the adjusting stud 9, and the adjusting stud 9 is rotatably inlaid in the fixing disc 32.

The end part of the adjusting stud 9 is fixedly provided with a second hand wheel 33, the outer surface of the adjusting stud 9 is screwed with an adjusting threaded sleeve 30, the second hand wheel 33 plays a role in facilitating rotation of the adjusting stud 9, the adjusting threaded sleeve 30 is positioned between the two groups of bearing rings 18, the outer surfaces of the two groups of bearing rings 18 extend into a plurality of groups of orientation sleeves 23 in an annular array mode, the insides of the plurality of groups of orientation sleeves 23 are respectively provided with a plurality of groups of orientation rods 24 in a fitting mode, the orientation sleeves 23 and the orientation rods 24 play a guiding role, so that the idler wheels 26 are ensured to move linearly, and the end parts of the plurality of groups of orientation rods 24 are respectively provided with a plurality of groups of idler wheels 26.

The end parts of the multiple groups of directional rods 24 are respectively fixedly provided with multiple groups of wheel frames 25, the rollers 26 are arranged in the wheel frames 25, the wheel frames 25 play a role in connecting the rollers 26, a synchronous rod 31 is embedded between the two groups of wheel frames 25 on the same straight line, the synchronous rod 31 plays a role in ensuring the synchronous movement of the rollers 26 on the two groups of bearing rings 18, a first concave block 27 extends from the front end surface of the wheel frame 25 on the bearing ring 18 at the rear part, three groups of second concave blocks 29 extend from the outer surface of the adjusting threaded sleeve 30 in an annular array manner, a connecting and fixing frame 28 is rotatably connected between the second concave blocks 29 and the first concave blocks 27, the connecting and fixing frame 28 is obliquely arranged, the first concave blocks 27 and the second concave blocks 29 play a role in connecting with the connecting and fixing frame 28, and the connecting and fixing frame 28 plays a role in pushing.

The pushing part comprises a stretching seat 8 fixedly installed at the lower part of the rear end of the bearing frame 5, a pushing stud 10 is installed below the stretching seat 8, a frame body 12 is screwed outside the pushing stud 10, a reinforcing frame 4 extends from the side surface of the bearing frame 5, the end part of the reinforcing frame 4 is fixedly connected with the upper end surface of the bottom frame 1, the stretching claw 2 and the bottom frame 1 are integrally formed, a reinforcing plate 13 extends obliquely from the lower part of the front end of the reinforcing frame 4, the reinforcing frame 4 plays a role in reinforcing the bearing frame 5, the end part of the reinforcing plate 13 is fixedly connected with the upper end surface of the stretching claw 2, the reinforcing plate 13 plays a role in reinforcing the joint between the reinforcing frame 4 and the bottom frame 1, the frame body 12 is sequentially attached to the rear end surface of the reinforcing frame 4 and the rear end surface of the reinforcing plate 13, and the frame body 12 plays a role in pressing.

Stretch out the rear end face middle part of seat 8 and extend and have the seat 11 of bearing, bear the seat 11 and play and carry out the effect of installing pushing stud 10, pushing stud 10 runs through to rotate and inlays in the inside of bearing seat 11, pushing stud 10's rear end fixed mounting has a hand wheel 14, the axial lead of hand wheel 14 and the axial lead collineation that pushes stud 10, a hand wheel 14 plays and is convenient for carry out the pivoted effect to pushing stud 10, bear seat 11 and stretch out seat 8 integrated into one piece, the rear end face of reinforcing frame 4 and the rear end face of reinforcing plate 13 all run through and have seted up the square hole, framework 12 laminates in the inside of square hole, the square hole plays the effect of restricting framework 12.

The support piece comprises two groups of guide posts 22 symmetrically attached to penetrate through the middle part of the upper end of the extending claw 2, the lower ends of the two groups of guide posts 22 are fixedly provided with a support bridge 3, the support bridge 3 is positioned below the extending claw 2, the support bridge 3 plays a supporting role, the upper ends of the two groups of guide posts 22 are inlaid with a pressure cap 20, the guide posts 22 play a guiding role, the axial lead of the pressure cap 20 is collinear with the axial lead of the guide posts 22, the pressure cap 20 is positioned above the extending claw 2, the outer side of the guide posts 22 is wound with a return spring 21, the return spring 21 plays a role in driving the support bridge 3 to reset, and simultaneously ensures that the inner upper end surfaces of the pressure cap 20 and the pressure groove 19 are always attached, the return spring 21 is positioned between the upper end of the extending claw 2 and the lower end of the pressure cap 20, the lower end surface of the frame body 12 is provided with two groups of pressure grooves 19, the pressure groove 19 plays a role in pressing the pressure cap 20, the inner upper end surface of the pressure groove 19 is provided with an inclined plane, the upper end surface of the pressing cap 20 is attached to the inner upper end surface of the pressing groove 19.

When the wire is paid off, the underframe 1 is pushed to the rear of the wire spool, the wire spool is positioned between the two groups of extending claws 2, the adjusting stud 9 enters the wire spool, then the wire spool directly grabs the second hand wheel 33 to rotate, the adjusting stud 9 is further driven to rotate, the adjusting threaded sleeve 30 screwed on the adjusting stud 9 is driven to move to push the connecting and fixing frame 28, the connecting and fixing frame 28 is driven to incline to push the wheel frame 25, the directional rod 24 slides in the directional sleeve 23, the auxiliary roller 26 moves inwards or outwards, the distance between the rollers 26 on the same circumference is simultaneously adjusted, the roller 26 can prop against the inner wall of the wire spool, then the third hand wheel 35 is rotated to grab the lifting stud 6, the lifting threaded sleeve 15 on the lifting stud 6 is driven to move upwards, the adjusting stud 9 is further driven to move upwards to support the wire spool, then, the pushing stud 10 is rotated to drive the frame body 12 to slide and move forward in the square holes on the reinforcing frame 4 and the reinforcing plate 13, so that the pressing cap 20 is pushed by using the pressing groove 19 on the frame body 12, the pressing cap 20 is driven to move downwards, the supporting bridge 3 is driven to move downwards to be in contact with the ground, meanwhile, the moving wheel 36 on the extending claw 2 is jacked and separated from the ground by the supporting bridge 3 instead of the moving wheel 36, the device is supported by the supporting bridge 3, then, the wire spool can be rotated to loosen a cable wound on the wire spool for paying off, and when the wire spool rotates for paying off, the roller 26 rolls to reduce the friction force between the roller and the wire spool, namely, the force applied to the wire spool during rotation is reduced, and the labor is saved during paying off.

The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pay-off based on electric power engineering, includes chassis (1), its characterized in that: the extension of the front end edge of chassis (1) has and stretches out claw (2), the upper end mid-mounting of chassis (1) has the promotion piece, the rear end of promoting the piece is installed and is pushed away the piece, the up end middle part that stretches out claw (2) runs through and installs support piece, it laminates with support piece mutually to push away the piece, the lower terminal surface edge that stretches out claw (2) is installed and is removed wheel (36), the support piece is installed to the front end that promotes the piece.

2. The pay-off device based on electric power engineering as claimed in claim 1, wherein: the lifting unit comprises a bearing frame (5) fixedly mounted at the middle part of the upper end face of the chassis (1), a lifting stud (6) is installed between the inner top face of the bearing frame (5) and the upper end face of the chassis (1) in a rotating mode, a third hand wheel (35) is fixedly mounted at the upper end part of the lifting stud (6), the axial lead of the third hand wheel (35) and the axial lead of the lifting stud (6) are collinear, a lifting thread sleeve (15) is screwed outside the lifting stud (6), two sets of connecting blocks (34) are symmetrically extended from the outer surface of the lifting thread sleeve (15), two sets of end parts of the connecting blocks (34) are respectively inlaid with two sets of sliding frames (16), and the sliding frames (16) are fitted on the outer surface of the bearing frame (5).

3. The pay-off device based on electric power engineering as claimed in claim 2, wherein: the support piece comprises a fixing seat (7) extending at the front ends of two sets of sliding frames (16), an adjusting stud (9) is installed in the middle of the front end of the fixing seat (7) in a rotating mode, three sets of fixing columns (17) are arranged on the outer side of the adjusting stud (9) in an annular array mode, one end of each fixing column (17) is fixedly connected with the front end of the corresponding fixing seat (7), three sets of fixing columns (17) are embedded into the outer surface of each fixing column (17) respectively, each bearing ring (18) is located on the outer side of the corresponding adjusting stud (9), one set of bearing rings (18) is located in the front of the other set of bearing rings (18), a fixing disc (32) is fixedly installed at the other end of each fixing column (17), and the adjusting studs (9) are rotatably embedded into the fixing disc (32).

4. The pay-off device based on electric power engineering as claimed in claim 3, wherein: the utility model discloses a bearing ring, including adjusting stud (9), the tip fixed mounting of adjusting stud (9) has No. two hand wheels (33), the surface of adjusting stud (9) is screwed and is had adjusting thread bush (30), adjusting thread bush (30) are located between two sets of bearing ring (18), and are two sets of the equal annular array in surface of bearing ring (18) extends multiunit orientation cover (23), multiunit the inside of orientation cover (23) is laminated respectively and is installed multiunit orientation pole (24), multiunit gyro wheel (26) are installed respectively to the tip of orientation pole (24).

5. The pay-off device based on electric power engineering as claimed in claim 4, wherein: the multiunit the tip of directional pole (24) is fixed mounting respectively has multiunit wheel carrier (25), install in the inside of wheel carrier (25) gyro wheel (26), wherein be located on the collinear two sets of it has synchronizing bar (31) to inlay between wheel carrier (25), wherein be located the rear the preceding terminal surface of wheel carrier (25) on bearing ring (18) extends and has a concave piece (27), the surface ring array of adjusting thread bush (30) extends and has No. two concave pieces (29) of three groups, it is connected with even solid frame (28) to rotate between No. two concave pieces (29) and a concave piece (27), it is the slope setting to link solid frame (28).

6. The pay-off device based on electric power engineering as claimed in claim 2, wherein: the push away the piece and include that fixed mounting stretches out seat (8) in the rear end lower part of bearer frame (5), stretch out the below of seat (8) and install and promote double-screw bolt (10), the outside that promotes double-screw bolt (10) is screwed and is had framework (12), the side of bearer frame (5) is extended there is reinforcing frame (4), the tip of reinforcing frame (4) and the up end fixed connection of chassis (1), it has reinforcing plate (13) to stretch out claw (2) and chassis (1) integrated into one piece, the slope of the front end lower part of reinforcing frame (4) is extended, the tip of reinforcing plate (13) and the up end fixed connection who stretches out claw (2), framework (12) laminate in proper order and run through the rear end face in the rear end face of reinforcing frame (4) and the rear end face of reinforcing plate (13).

7. The pay-off device based on electric power engineering as claimed in claim 6, characterized in that: the rear end face middle part that stretches out seat (8) extends and has born seat (11), promote double-screw bolt (10) to run through to rotate and inlay in the inside that bears seat (11), the rear end fixed mounting who promotes double-screw bolt (10) has hand wheel (14) No. one, the axial lead of hand wheel (14) and the axial lead collineation that promotes double-screw bolt (10), bear seat (11) and stretch out seat (8) integrated into one piece, the rear end face of reinforcing frame (4) all runs through with the rear end face of reinforcing plate (13) and has seted up the square hole, framework (12) are laminated in the inside of square hole.

8. The pay-off device based on electric power engineering as claimed in claim 7, wherein: the supporting piece comprises two groups of guide posts (22) which are symmetrically attached to the middle part of the upper end of the extending claw (2) in a penetrating way, the lower ends of the two groups of guide posts (22) are fixedly provided with a supporting bridge (3), the supporting bridge (3) is positioned below the extending claw (2), the upper ends of the two groups of guide posts (22) are embedded with pressing caps (20), the axial lead of the pressing cap (20) is collinear with the axial lead of the guide post (22), the pressing cap (20) is positioned above the extending claw (2), a return spring (21) is wound on the outer side of the guide post (22), the return spring (21) is positioned between the upper end of the extending claw (2) and the lower end of the pressing cap (20), two groups of pressure grooves (19) are arranged on the lower end surface of the frame body (12), the upper end surface of the interior of each pressure groove (19) is provided with an inclined surface, the upper end surface of the pressing cap (20) is attached to the upper end surface of the interior of the pressing groove (19).