CN115213876B

CN115213876B - Industrial mechanical arm for brake disc production

Info

Publication number: CN115213876B
Application number: CN202211140065.7A
Authority: CN
Inventors: 王勇; 孙国辉; 王松
Original assignee: Yantai Meifeng Machinery Co ltd
Current assignee: Yantai Meifeng Machinery Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-11-22
Anticipated expiration: 2042-09-20
Also published as: CN115213876A

Abstract

The invention relates to the technical field of industrial manipulators, in particular to an industrial mechanical arm for producing a brake disc, which comprises a supporting assembly, wherein a connecting assembly is assembled on the supporting assembly, the connecting assembly consists of a rotating table, a lower lifting arm, a connecting spiral ring, an upper lifting arm, a supporting arm, an extending arm and a lock head which are sequentially arranged from bottom to top, a grabbing assembly is assembled at one end of the extending arm, which is far away from the lock head, and the grabbing assembly comprises a limiting column, a guiding rod, a second compression spring, a four-way hinge joint, a first hinge column, a hinge arm, a sliding block, a second hinge column, a bottom support and an object stage. According to the invention, the brake disc main body is lifted from the lower part, so that the problem that the ring surface of the brake disc main body is scratched due to direct grabbing or the brake disc main body is damaged due to rotation and falling during transferring can be avoided, and the brake disc main body can be prevented from sliding during transferring by utilizing the method that the anti-slip pad is abutted on the inner wall of the brake disc main body to increase the friction force.

Description

Industrial mechanical arm for brake disc production

Technical Field

The invention relates to the technical field of industrial manipulators, in particular to an industrial mechanical arm for producing a brake disc.

Background

The brake disc is a round disc, the brake disc rotates when a vehicle runs, the brake caliper clamps the brake disc to generate braking force so as to brake the vehicle, the brake effect of the brake disc is good, and the brake disc is easier to maintain than a drum brake, so that the brake disc is widely used; and the brake disc can only produce the finished product through the processing of multiple process when producing, in order to improve production efficiency and precision, can use the arm to operate usually.

Through retrieval, the chinese invention patent of patent No. CN112605985A discloses "a wire drive mechanism of a robot arm and a robot arm", including a first motor, a first motor synchronous driving wheel, an intermediate wheel, an output wheel, a first wire and a second wire, the first wire is wound on the first motor synchronous driving wheel and the intermediate wheel, the second wire is wound on the intermediate wheel and the output wheel, the first motor synchronous driving wheel is installed on an output shaft of the first motor, the first motor drives the first motor synchronous driving wheel, the first motor synchronous driving wheel drives the intermediate wheel through the first wire, and the intermediate wheel drives the output wheel through the second wire.

However, it is found through analysis that the existing end actuating mechanism of the mechanical arm is a mechanical claw or a suction device, but a single mechanical claw is easy to fall off or slide when grabbing, and a single suction device is easy to mark a brake disc, so that a semi-finished product or a finished product is damaged and scratched.

Therefore, an industrial mechanical arm for producing a brake disc is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide an industrial mechanical arm for producing a brake disc, which aims to solve the problems that the mechanical arm is inconvenient to transfer and a finished product is easy to scratch when a claw of a common mechanical arm directly grabs.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an industrial mechanical arm is used in brake disc production, includes supporting component, the last coupling assembling that is equipped with of supporting component, coupling assembling comprises from revolving stage, lower lifting arm, the connection spiro, the arm that goes up and down that up arranges in proper order, support arm, extension arm and tapered end down, just the one end that the tapered end was kept away from to the extension arm is equipped with snatchs the subassembly, it includes spacing post, guide bar, second compression spring, four-way hinge, first hinge post, articulated arm, slider, the hinge post of second, collet and objective table to snatch the subassembly, the one end of guide bar is in spacing post with spacing post sliding connection, the other end and the collet fixed connection of guide bar, the second compression spring cover is established at the surface of guide bar, four-way hinge and spacing post fixed connection, the both ends and the four-way hinge fixed connection of first hinge post, the both ends and the four-way hinge fixed connection of articulated arm, the both ends of articulated arm are established respectively at the surface of first hinge post and second hinge post, the both ends and slider fixed connection, the upper surface of collet has been seted up to the upper surface of antiskid pad.

Preferably, a brake disc main body, a second electric push rod, a connecting plate and a first electric push rod are arranged above the limiting column, the brake disc main body is sleeved on the outer surface of the non-slip mat, a shell of the second electric push rod is fixedly connected with the connecting plate, the output end of the second electric push rod is fixedly connected with the bottom support, and the output end of the first electric push rod is fixedly connected with the connecting plate.

Preferably, the casing and the extension arm fixed connection of first electric push rod, just the output and the lower lifing arm fixed connection of revolving stage, the lifing arm cover establish at the surface of last lifing arm and with the lifing arm sliding connection down, connect the spiral loop cover establish at the surface of lifing arm and the lifing arm down and with lifing arm threaded connection down, the surface at last lifing arm is cup jointed to the one end of support arm, the other end fixed connection of support arm is at the lower surface of extension arm, the extension arm cup joints the surface at last lifing arm, the top of going up the lifing arm runs through the extension arm and with tapered end fixed connection.

Preferably, the supporting component comprises a chassis, the upper surface of the chassis is fixedly connected with the rotating table, ground nails are fixedly assembled on the lower surface of the chassis, and fixing holes are formed in the surface of the chassis.

Preferably, the top on chassis is provided with screens ring, screens hole, screens groove and spread groove, screens ring and chassis fixed connection, the upper surface at the screens ring is seted up in the screens hole, the screens groove is seted up at the interior rampart of screens ring, the centre at the chassis upper surface is seted up to the spread groove.

Preferably, the inside of spread groove is rotated and is connected with cross connecting pile, the top of cross connecting pile is provided with the connecting block, the cross connecting hole has been seted up to the lower surface of connecting block, the cross connecting hole is connected with cross connecting pile gomphosis, the side of connecting block is seted up flutedly, is provided with first compression spring and fixture block in the recess, first compression spring's both ends respectively with connecting block and fixture block fixed connection, fixture block and connecting block sliding connection, the last fixed surface of connecting block is connected with the spacing ring, spacing hole has been seted up on the surface of spacing ring, spacing downthehole inlay has the spacing bolt, the top fixed assembly of spacing bolt has the lug.

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

(1) Through lifting up the brake disc main part from the below, can avoid directly snatching the anchor ring of brake disc main part and lead to the anchor ring fish tail or rotatory the problem that drops and damage when shifting.

(2) The method for increasing the friction force by the anti-slip pad abutting against the inner wall of the brake disc main body can prevent the brake disc main body from sliding in the transferring process.

(3) Through the design of concatenation formula, make things convenient for supporting component's installation and dismantlement to be convenient for remove.

(4) Through the buckle in fixture block and screens groove, can let the arm realize 360 no dead angles rotations at same horizontal plane, the fixed rotation angle of cooperation revolving stage to utilize the gomphosis in spacing bolt and screens hole, can let the lower extreme and the ground of arm be connected more stably firm.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic front cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic perspective view of the base plate of FIG. 3 according to the present invention;

FIG. 5 is a schematic perspective view of the cross connecting pile of FIG. 3 according to the present invention;

FIG. 6 is a schematic perspective view of the connecting block of FIG. 3 according to the present invention;

FIG. 7 is a schematic bottom view of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic perspective view of the first compression spring and the latch of FIG. 3 according to the present invention;

FIG. 9 is a schematic perspective view of the stop bolt and the bump of FIG. 3 according to the present invention;

FIG. 10 is an enlarged schematic view of the invention at B of FIG. 2;

FIG. 11 is a schematic perspective view of the spacing post of FIG. 10 according to the present invention;

FIG. 12 is an enlarged view at C of FIG. 11 in accordance with the present invention;

FIG. 13 is a schematic perspective view of the articulated arm of FIG. 10 in accordance with the invention;

FIG. 14 is an enlarged view of the structure shown at D in FIG. 13;

fig. 15 is a schematic perspective view of the present invention in use.

In the figure: 1. a support assembly; 11. a chassis; 12. a ground nail; 13. a fixing hole; 14. a position clamping ring; 15. a position clamping hole; 16. a clamping groove; 17. connecting grooves; 18. cross connecting piles; 19. a cross-shaped connecting hole; 110. connecting blocks; 111. a first compression spring; 112. a clamping block; 113. a limiting ring; 114. a limiting hole; 115. a limit bolt; 116. a bump; 2. a connecting assembly; 21. a rotating table; 22. a lower lifting arm; 23. connecting a spiro ring; 24. an upper lifting arm; 25. a support arm; 26. an extension arm; 27. a lock head; 3. a grasping assembly; 31. a first electric push rod; 32. a connecting plate; 33. a second electric push rod; 34. a brake disc main body; 35. a limiting post; 36. a guide rod; 37. a second compression spring; 38. a four-way hinge; 39. a first hinge post; 310. an articulated arm; 311. a slider; 312. a second hinge post; 313. a non-slip mat; 314. a bottom support; 315. an object stage.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-14, the present invention provides an embodiment:

an industrial mechanical arm for producing a brake disc comprises a connecting assembly 2 and an object stage 315, wherein the connecting assembly 2 comprises a rotating table 21, a lower lifting arm 22, a connecting spiral ring 23, an upper lifting arm 24, a supporting arm 25, an extending arm 26 and a lock head 27 which are sequentially arranged from bottom to top, the output end of the rotating table 21 is fixedly connected with the lower lifting arm 22, the lower lifting arm 22 can rotate by electrifying the rotating table 21 to adjust the angle of the lower lifting arm 22 on the same horizontal plane, the connecting assembly 2 can conveniently rotate back and forth between different processes, the lower lifting arm 22 is sleeved on the outer surface of the upper lifting arm 24, the lower lifting arm 22 is slidably connected with the upper lifting arm 24, the overall height of the connecting assembly 2 can be adjusted by sliding the upper lifting arm 24 on the lower lifting arm 22, the connecting spiral ring 23 can be suitable for the mechanical arms with different heights, the connecting spiral ring 23 is sleeved on the outer surfaces of the lower lifting arm 22 and the upper lifting arm 24, the upper end of the outer surface of the lower lifting arm 22 is provided with external threads, the lower end of the inner surface of the connecting spiral ring 23 is tightly provided with internal threads, the lower lifting arm 22 is connected with the connecting spiral ring 23, and the lower lifting arm is connected with the spiral ring 22, and the lifting arm can be adjusted to the length of the spiral ring after the lifting arm is properly adjusted; one end of the supporting arm 25 is sleeved on the outer surface of the upper lifting arm 24, the other end of the supporting arm 25 is fixedly connected to the lower surface of the extending arm 26, and the upper lifting arm 24, the supporting arm 25 and the extending arm 26 form a triangle through the connection of the supporting arm 25, so that the extending arm 26 is not easy to bend after the mechanical arm grabs an object due to the optimal stability of the triangle; extension arm 26 cup joints the surface at last lifing arm 24 to be located the below of tapered end 27, go up the top of lifing arm 24 simultaneously and run through extension arm 26 and with tapered end 27 fixed connection, utilize tapered end 27 and the connection of lifing arm 24 that rises, can make things convenient for extension arm 26's dismouting, be convenient for shift or overhaul.

In fig. 3, a support assembly 1 is arranged below a connection assembly 2, the support assembly 1 includes a chassis 11, a ground nail 12 is fixedly assembled on the bottom surface of the chassis 11, the chassis 11 and the ground can be stably connected together through the ground nail 12, and meanwhile, the area of the chassis 11 is large, so that the ground nail 12 cannot be easily put into the ground after being used for a long time, and meanwhile, a fixing hole 13 is formed in the surface of the chassis 11, and after a fixing bolt is inserted into the fixing hole 13 and is nailed into the ground, the connection between the ground nail 12 and the ground can be reinforced; a clamping ring 14, a clamping hole 15, a clamping groove 16 and a connecting groove 17 are arranged above the chassis 11, the clamping ring 14 is fixedly connected with the chassis 11, the clamping hole 15 is arranged on the upper surface of the clamping ring 14, the clamping groove 16 is arranged on the inner annular wall of the clamping ring 14, the connecting groove 17 is arranged in the middle of the upper surface of the chassis 11, a cross-shaped connecting pile 18 is rotatably connected inside the connecting groove 17, a connecting block 110 is arranged above the cross-shaped connecting pile 18, a cross-shaped connecting hole 19 is arranged on the lower surface of the connecting block 110, the cross-shaped connecting hole 19 is embedded and connected with the cross-shaped connecting pile 18, a groove is arranged on the side surface of the connecting block 110, a first compression spring 111 and a clamping block 112 are arranged in the groove, two ends of the first compression spring 111 are respectively fixedly connected with the connecting block 110 and the clamping block 112, the clamping block 112 is slidably connected with the connecting block 110, and the cross-shaped connecting pile 18 is embedded and the cross-shaped connecting hole 19, the connecting block 110 and the chassis 11 can be connected into a whole and is not easy to tilt, the cross connecting pile 18 is rotatably connected with the chassis 11 in the connecting groove 17, so that the angle adjustment of the connecting block 110 is convenient, the invention can continuously adjust the working angle on the same horizontal plane after the chassis 11 is fixed, the clamping block 112 and the clamping groove 16 are meshed and connected, when the connecting block 110 rotates, the clamping block 112 is compressed to cause the first compression spring 111 to compress, and after rotating for one grid, the clamping block 112 is pushed back to the original position by the first compression spring 111 to realize the angle fixation of the connecting block 110, in addition, the upper surface of the connecting block 110 is fixedly connected with the limiting ring 113, the surface of the limiting ring 113 is provided with the limiting hole 114, the limiting hole 114 and the clamping hole 15 are in the same diameter, and along with the clamping of the clamping block 112 and the clamping groove 16, the limiting hole 114 can be aligned with any clamping hole 15, a limiting bolt 115 is embedded in the limiting hole 114, the limiting bolt 115 penetrates through the limiting hole 114 and then is inserted into the clamping hole 15, so that the position of the limiting ring 113 is limited, the connecting block 110 with a determined angle is prevented from continuously rotating, the invention can normally take effect during operation, the top end of the limiting bolt 115 is fixedly provided with a lug 116, and the lug 116 is used for conveniently taking up the limiting bolt 115; importantly, the housing of the rotary table 21 is fixedly connected to the upper surface of the limiting ring 113, the limiting ring 113 provides a supporting point for the rotary table 21, and the angle of the connecting assembly 2 can be adjusted by the supporting assembly 1.

In fig. 2, a gripping assembly 3 is arranged on a side surface of the extension arm 26, the gripping assembly 3 includes a first electric push rod 31, a connecting plate 32, a second electric push rod 33 and a base support 314 which are sequentially arranged from top to bottom as shown in fig. 2 and fig. 10, the first electric push rod 31 and the second electric push rod 33 are arranged on the same side of the connecting plate 32, a housing of the first electric push rod 31 is fixedly connected with the extension arm 26, an output end of the first electric push rod 31 is fixedly connected with the connecting plate 32, a horizontal position of the base support 314 can be adjusted by using the expansion and contraction of the first electric push rod 31, a housing of the second electric push rod 33 is fixedly connected with the connecting plate 32, an output end of the second electric push rod 33 is fixedly connected with the base support 314, a vertical position of the base support 314 can be adjusted by the expansion and contraction of the second electric push rod 33, and the first electric push rod 31 are matched, so that a final position of the base support 314 can be adjusted; the brake disc main body 34 can be self-determined according to the using position of the brake disc main body 34, can be processed or processed to be transferred, the brake disc main body 34 to be transferred is positioned on a designated object stage 315 before being transferred to a processing table or when being transferred from the processing table, the object stage 315 is used as a transfer table for manual feeding, and because the processing table is provided with a drill rotating at a high speed and other various cutting and grinding devices, if the brake disc main body 34 is directly transferred manually, certain dangerousness (such as cut or temperature scald caused by the drill rubbing at a high speed) exists, while the manipulator is used for stably clamping the brake disc main body 34 and then safely transferring; the brake disc main body 34 is sleeved on the outer surface of the limiting column 35 and is connected with the limiting column 35 in a sliding way through the lifting of the second electric push rod 33, the upper surface of the brake disc main body 34 is propped against the connecting plate 32, the lower surface of the brake disc main body 34 is propped against the bottom support 314, a cavity is arranged inside the limit column 35, the guide rod 36 is connected with the limit column 35 in a sliding way in the cavity of the limit column 35, and the guiding rod 36 is fixedly connected with the bottom bracket 314, the second compression spring 37 is sleeved on the outer surface of the guiding rod 36, and both ends of the second compression spring 37 are respectively and fixedly connected with the bottom support 314 and the limiting column 35, the guiding rod 36 is used for guiding the sliding direction of the second compression spring 37, thereby avoiding the failure of the device caused by the outward inclination of the second compression spring 37 when being compressed, finally, the four-way hinge joint 38, the first hinge joint column 39, the hinge arm 310, the sliding block 311, the second hinge joint column 312 and the anti-slip pad 313 are sequentially arranged from left to right below the limiting column 35, the four-way hinge joint 38 is fixedly connected with the limiting column 35, the first hinge joint column 39 is fixedly connected with the four-way hinge joint 38, both ends of the hinge arm 310 are respectively and rotatably connected with the first hinge joint column 39 and the second hinge joint column 312, the second hinge joint column 312 is fixedly connected with the sliding block 311, the anti-slip pad 313 is fixedly connected with the sliding block 311, a sliding rail is arranged inside the bottom support 314, the sliding block 311 is connected with the bottom support 314 in the sliding rail, when the shoe 314 moves the restraint post 35 upward against the connecting plate 32, the four-way hinge 38 continues to compress downward to contract the second compression spring 37, meanwhile, the hinge arm 310 gradually changes from vertical to horizontal, so that the anti-slip pads 313 slide outwards along the tracks of the bottom support 314, and finally the anti-slip pads 313 abut against the inner wall of the brake disc main body 34, friction is increased, and the brake disc main body 34 cannot slide or fall off when moving.

The working principle is as follows: as shown in FIG. 15, after the device is installed at a designated position, the device is connected with a power supply, the second compression spring 37 is in an extended state at the moment, the limiting column 35 is far away from the bottom support 314 under the support of the second compression spring 37 at the moment, the articulated arm 310 is driven to be close to vertical, the four anti-skid pads 313 are also close to the four-way articulated joint 38 and attached to the outer surface of the limiting column 35, the output end of the connecting plate 32 extends to the farthest position, the output end of the first electric push rod 31 retracts to the shortest, and the lengths of the lower lifting arm 22 and the upper lifting arm 24 are automatically adjusted according to the height of the workbench.

When the brake disc main body 34 is used, the brake disc main body 34 is located above the appointed object stage 315, the object stage 315 right below the brake disc main body 34 is provided with a through groove, the width of the through groove is equal to that of the bottom support 314 and smaller than the diameter of the brake disc main body 34, at the moment, the first electric push rod 31 is electrified and extends out, the bottom support 314 is moved to the position below the brake disc main body 34, the upper surface of the limiting column 35 is lower than the lower surface of the brake disc main body 34, after the limiting column 35 is aligned with a round hole in the middle of the brake disc main body 34, the second electric push rod 33 contracts to drive the bottom support 314 to ascend until the limiting column 35 abuts against the bottom surface of the connecting plate 32 and compress the second compression spring 37, at the moment, the four-way hinge head 38 presses the hinge arm 310 to change from vertical to horizontal, the hinge arm 310 pushes the slide block 311 to drive the anti-skid pad 313 to extend outwards until the anti-skid pad abuts against the inner wall of the brake disc main body 34, then the first electric push rod 31 contracts to pull the brake disc main body 34 out of the work stage, then the rotary table 21 rotates, and the brake disc main body 34 is transferred to the appointed position, and the first electric push rod 31, the second electric push rod 33 and the brake disc main body 35 and the brake disc main body 34 is reversely operated.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an industrial mechanical arm is used in brake disc production, includes supporting component (1), its characterized in that: the support component (1) is provided with a connecting component (2), the connecting component (2) consists of a rotating table (21), a lower lifting arm (22), a connecting spiral ring (23), an upper lifting arm (24), a support arm (25), an extension arm (26) and a lock head (27) which are sequentially arranged from bottom to top, one end, away from the lock head (27), of the extension arm (26) is provided with a grabbing component (3), the grabbing component (3) comprises a limiting column (35), a guide rod (36), a second compression spring (37), a four-way hinge joint (38), a first hinge column (39), a hinge arm (310), a sliding block (311), a second hinge column (312), a bottom support (314) and an object carrying table (315), one end of the guide rod (36) is slidably connected with the limiting column (35) in the limiting column (35), the other end of the guide rod (36) is fixedly connected with the bottom support (314), the outer surface of the second compression spring (37) is sleeved on the guide rod (36), the four-way hinge joint (38) is fixedly connected with the hinge joint (35), and the outer surface of the first hinge column (39) is sleeved on the second hinge arm (310), the two ends of the second hinging column (312) are fixedly connected with a sliding block (311), a sliding rail is arranged on the upper surface of the bottom support (314), the sliding block (311) is slidably connected with the bottom support (314) in the sliding rail, an anti-slip pad (313) is fixedly connected with the upper surface of the sliding block (311), a brake disc main body (34), a second electric push rod (33), a connecting plate (32) and a first electric push rod (31) are arranged above the limiting column (35), the brake disc main body (34) is sleeved on the outer surface of the anti-slip pad (313), a shell of the second electric push rod (33) is fixedly connected with the connecting plate (32), the output end of the second electric push rod (33) is fixedly connected with the bottom support (314), the output end of the first electric push rod (31) is fixedly connected with the connecting plate (32), the shell of the first electric push rod (31) is fixedly connected with an extension arm (26), the output end of the rotating table (21) is fixedly connected with the lower lifting arm (22), the lower lifting arm (22) is sleeved on the outer surface of the upper lifting arm (24), the lifting arm (24) is connected with the lifting arm (22), and the lifting arm (22) is connected with the lifting arm (22) through a screw thread, and one end of the lifting arm (24) is connected with the lifting arm (22), the other end of the supporting arm (25) is fixedly connected to the lower surface of the extending arm (26), the extending arm (26) is sleeved on the outer surface of the upper lifting arm (24), and the top end of the upper lifting arm (24) penetrates through the extending arm (26) and is fixedly connected with the lock head (27).

2. The industrial mechanical arm for producing the brake disc according to claim 1, wherein: the supporting component (1) comprises a chassis (11), the upper surface of the chassis (11) is fixedly connected with a rotating platform (21), ground nails (12) are fixedly arranged on the lower surface of the chassis (11), and fixing holes (13) are formed in the surface of the chassis (11).

3. The industrial mechanical arm for producing the brake disc according to claim 2, wherein: the top on chassis (11) is provided with screens ring (14), screens hole (15), screens groove (16) and spread groove (17), screens ring (14) and chassis (11) fixed connection, the upper surface at screens ring (14) is seted up in screens hole (15), the interior rampart at screens ring (14) is seted up in screens groove (16), the centre at chassis (11) upper surface is seted up in spread groove (17).

4. The industrial mechanical arm for producing the brake disc as claimed in claim 3, wherein: the connecting structure is characterized in that a cross connecting pile (18) is rotatably connected to the inside of the connecting groove (17), a connecting block (110) is arranged above the cross connecting pile (18), a cross connecting hole (19) is formed in the lower surface of the connecting block (110), the cross connecting hole (19) is connected with the cross connecting pile (18) in an embedded mode, a groove is formed in the side face of the connecting block (110), a first compression spring (111) and a clamping block (112) are arranged in the groove, two ends of the first compression spring (111) are fixedly connected with the connecting block (110) and the clamping block (112) respectively, the clamping block (112) is connected with the connecting block (110) in a sliding mode, a limiting ring (113) is fixedly connected to the upper surface of the connecting block (110), a limiting hole (114) is formed in the surface of the limiting ring (113), a limiting bolt (115) is embedded in the limiting hole (114), and a protruding block (116) is fixedly assembled at the top end of the limiting bolt (115).