Automatic string winding machine for string production

Abstract

The invention relates to the technical field of string production equipment, and discloses an automatic string winding machine for string production, which comprises a bottom table, an equipment bin is fixedly assembled on the back of the bottom table, a winding device is fixedly assembled on the inner wall of the equipment bin, and a winding device is mounted at the top of the bottom table; the winding device comprises a mounting support, the inner wall of the mounting support is movably connected with a rotary drum, and a round hole is formed in the outer wall of the rotary drum. The string on the clamping jaw is driven by the moving motor screw rod II to move towards the winding assembly to reach the center of the rotating ring, and the rotating disc and the rotating ring are driven to rotate to the position above the clamping jaw through operation of the rotating gear motor and then rotate to the position below the clamping jaw from the position above the clamping jaw. And meanwhile, a driving motor operates to drive a driving wheel to rotate, a driving belt, a top roller and a rotating ring to rotate, and the string clamped on the outer shell is wound around a string ring, so that the problem of low winding efficiency caused by the fact that manual winding is needed in the winding process before packaging in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of musical string production equipment, in particular to an automatic string winding machine for musical string production. Background Art

[0002] The strings are the lines on a string instrument that generate sound. Under a certain tension, the strings are stimulated to vibrate through friction, striking and other techniques, and the sound is amplified by the resonance cavity. They are the most important component of a string instrument.

[0003] There are two winding processes in the production process of guitar strings. One of the processes is to use a guitar string winding machine to fix both ends of the steel wire on a rotating shaft with the same rotation speed, and to evenly wind the copper wire transported laterally onto the steel wire. Another process is to wind the strings before packaging. The winding is to make the strings form a circle, and then a model label is affixed. The label plays a role in fixing the end of the string so that the wound round string will not become loose, which is convenient for the subsequent packaging process and also improves the aesthetics. However, the existing winding process before packaging requires manual winding, which leads to the problem of low winding efficiency. Summary of the invention

[0004] The present invention provides an automatic string winding machine for producing musical strings, which solves the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an automatic string winding machine for string production, comprising a base, a device compartment is fixedly mounted on the back of the base, a coiling device is fixedly mounted on the inner wall of the device compartment, and a winding device is installed on the top of the base;

[0006] The winding device comprises a mounting bracket, the inner wall of the mounting bracket is movably connected to a rotating drum, a circular hole is opened on the outer wall of the rotating drum, a movable rod is movably connected to the inner wall of the circular hole, a coil piece is fixedly mounted on one end of the movable rod, and a hanging rod is fixedly mounted on the outer wall of the rotating drum;

[0007] The winding device comprises a clamping jaw, and a winding assembly is arranged on the right side of the clamping jaw.

[0008] As a preferred technical solution of the present invention, a slide groove is provided on the inner wall of the rotating drum, a conical column is slidably connected to the inner wall of the slide groove, and a contact piece is slidably connected to the outer edge of the conical column.

[0009] As a preferred technical solution of the present invention, a connecting block is fixedly mounted on the outer edge of the contact piece, the connecting block is movably connected to the movable rod, and a supporting spring is movably sleeved on the outer edge of the movable rod.

[0010] As a preferred technical solution of the present invention, a pneumatic telescopic rod is installed at one end of the conical column away from the movable rod, and the pneumatic telescopic rod is connected to the air pipe through a rotating joint.

[0011] As a preferred technical solution of the present invention, the outer wall of the pneumatic telescopic rod is fixedly equipped with a bottom turntable, the outer wall of the bottom turntable is rotatably connected to a rotating belt, the inner wall of the rotating belt is rotatably connected to a top turntable, and the inner wall of the top turntable is fixedly sleeved with a rotating motor.

[0012] As a preferred technical solution of the present invention, a connecting bracket is installed on the outer edge of the clamp, the bottom of the connecting bracket is slidably connected to the top rail, a movable bracket is installed on the bottom of the top rail, the bottom of the movable bracket is slidably connected to the bottom rail, the outer edge of the movable bracket is fixedly equipped with a mounting plate, and the winding assembly is mounted on the mounting plate.

[0013] As a preferred technical solution of the present invention, the inner wall of the connecting bracket is threadedly connected with a movable motor screw rod 2, and the movable motor screw rod 2 is installed on the movable bracket. The inner wall of the movable bracket is threadedly connected with a movable motor screw rod 1, and the movable motor screw rod 1 is installed on the equipment bin.

[0014] As a preferred technical solution of the present invention, the winding assembly includes a vertical plate, the outer edges of the two ends of the bottom of the vertical plate are fixedly equipped with bottom rollers, the top of the bottom roller is fixedly equipped with a top roller, the top roller and the inner wall of the bottom roller are rotatably connected with a rotating circle, the rotating circle and the outer edge of the vertical plate are both provided with vertical grooves, a driving wheel is provided on the top of the vertical plate, the inner wall of the driving wheel is fixedly sleeved on the power output shaft of the driving motor, and a driving belt is installed on the outer edge of the top roller and the driving wheel.

[0015] As a preferred technical solution of the present invention, a fixed bracket is fixedly installed on the outer edge of the vertical plate, a rotating turntable is fixedly installed on the end of the fixed bracket away from the vertical plate, a rotating reduction motor is fixedly installed on the outer edge of the rotating turntable, and the rotating reduction motor is mounted on the mounting plate.

[0016] As a preferred technical solution of the present invention, the inner wall of the top of the rotating circle is movably connected with a horizontal axis, the outer edge of the horizontal axis is fixedly equipped with an outer shell, the inner cavity of the outer shell is provided with a splint, the top of the splint is fixedly equipped with a vertical rod, the vertical rod passes through the outer shell, and the outer edge of the vertical rod is movably sleeved with a clamping spring, the bottom of the inner cavity of the outer shell is installed with a bottom rubber tooth piece, and the bottom of the splint is installed with a top rubber tooth piece.

[0017] The present invention has the following beneficial effects:

[0018] 1. The automatic string winding machine for string production drives the strings on the clamping jaws to move toward the winding assembly to the center of the rotating circle by moving the motor lead screw two, and drives the rotating turntable and the rotating circle to rotate to the top of the clamping jaws by rotating the reduction motor, and then rotates from the top of the clamping jaws to the bottom of the clamping jaws. At the same time, the driving motor drives the driving wheel, the driving belt, the top roller and the rotating circle to rotate, and the strings clamped on the outer shell are wound around the string circle, thereby solving the problem that the existing winding process before packaging needs to be manually wound, resulting in low winding efficiency.

[0019] 2. The automatic string winding machine for producing strings has a tapered column whose diameter gradually decreases from the end to the tail. The diameter of the coil can be gradually increased by moving the tapered column forward, and the diameter of the coil can be gradually reduced by pulling the tapered column backward, so that the device can wind string coils of different diameters and can wind different string coils at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the winding device of the present invention;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the winding device of the present invention;

[0024] Figure 5 For the present invention Figure 4 A is an enlarged structural diagram;

[0025] Figure 6 It is a schematic diagram of the structure of the winding device of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the winding assembly of the present invention;

[0027] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in FIG.

[0028] Fig. 9 It is a schematic diagram of the rotating circle and top roller structure of the present invention.

[0029] In the figure: 1. base platform; 2. equipment compartment; 3. winding device; 4. winding device;

[0030] 301, mounting bracket; 302, rotating drum; 303, slide groove; 304, conical column; 305, round hole; 306, movable rod; 307, ring piece; 308, connecting block; 309, contact piece; 310, supporting spring; 311, pneumatic telescopic rod; 312, bottom turntable; 313, rotating belt; 314, top turntable; 315, rotating motor; 316, hanging rod;

[0031] 401, moving motor lead screw 1; 402, moving bracket; 403, bottom track; 404, top track; 405, moving motor lead screw 2; 406, connecting bracket; 407, clamping claw; 408, winding assembly; 409, mounting plate;

[0032] 4081, vertical plate; 4082, bottom roller; 4083, driving motor; 4084, driving wheel; 4085, top roller; 4086, driving belt; 4087, rotating circle; 4088, vertical slot; 4089, fixed bracket; 40810, rotating turntable; 40811, rotating reduction motor; 40812, horizontal axis; 40813, outer shell; 40814, clamping plate; 40815, vertical rod; 40816, clamping spring; 40817, top rubber tooth piece; 40818, bottom rubber tooth piece. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 - Fig. 9 An automatic string winding machine for string production includes a base 1, a device compartment 2 is fixedly mounted on the back of the base 1, the device compartment 2 is used to wrap the motor and the cylinder, and protect the motor and the cylinder, a coiling device 3 is fixedly mounted on the inner wall of the device compartment 2, the coiling device 3 is used to coil the string, and the string is wound from a straight line into a circle, and a winding device 4 is installed on the top of the base 1, and the winding device 4 is used to wind the end of the string on the string that has been wound into a circle, so that the circular string will not be loose;

[0035] The winding device 3 includes a mounting bracket 301, the inner wall of which is movably connected with a rotating drum 302, the rotating drum 302 can rotate in the mounting bracket 301, the mounting bracket 301 serves to limit the rotating drum 302, the outer wall of the rotating drum 302 is provided with a circular hole 305, the inner wall of the circular hole 305 is movably connected with a movable rod 306, the movable rod 306 can move in the circular hole 305, one end of the movable rod 306 is fixedly equipped with a coil piece 307, the coil piece 307 serves to support the strings, the movement of the movable rod 306 can make the diameter of the coil piece 307 larger, and can be wound around strings of different diameters, the outer wall of the rotating drum 302 is fixedly equipped with a hanging rod 316, the strings can be sleeved on the hanging rod 316, which serves to fix the strings;

[0036] The winding device 4 includes a clamp 407, which can clamp and fix the wound string loop. The string loop can be removed from the movable rod 306 by moving the clamp 407. A winding assembly 408 is provided on the right side of the clamp 407, and the removed string loop is wound through the winding assembly 408.

[0037] In a preferred embodiment, a slide groove 303 is provided on the inner wall of the rotating cylinder 302, and a conical column 304 is slidably connected to the inner wall of the slide groove 303, and a contact piece 309 is slidably connected to the outer edge of the conical column 304. The contact piece 309 can be pushed by the movement of the conical column 304. When the contact piece 309 is located at a position where the diameter of the conical column 304 is large, the movable rod 306 extends more and the diameter of the circle piece 307 becomes larger. When the contact piece 309 is located at a position where the diameter of the conical column 304 is small, the movable rod 306 extends less and the diameter of the circle piece 307 becomes smaller, so that strings of different diameters can be wound around.

[0038] In a preferred embodiment, the outer edge of the contact piece 309 is fixedly equipped with a connecting block 308, and the connecting block 308 is movably connected to the movable rod 306. When the conical column 304 moves, it will drive the contact piece 309 to change its angle, and the angle between the contact piece 309 and the movable rod 306 will change. The outer edge of the movable rod 306 is movably sleeved with a support spring 310, and the support spring 310 supports the movable rod 306, so that the movable rod 306 can fit tightly with the conical column 304, thereby improving the stability of the device.

[0039] In a preferred embodiment, a pneumatic telescopic rod 311 is installed at one end of the conical column 304 away from the movable rod 306. The pneumatic telescopic rod 311 is connected to the air pipe through a rotating joint. The pneumatic telescopic rod 311 needs to be rotated when in use. The pneumatic telescopic rod 311 is connected to the air pipe through a rotating joint so that the pneumatic telescopic rod 311 can rotate, thereby improving the rationality of the device.

[0040] In a preferred embodiment, the outer wall of the pneumatic telescopic rod 311 is fixedly equipped with a bottom turntable 312, the outer wall of the bottom turntable 312 is rotatably connected to a rotating belt 313, the inner wall of the rotating belt 313 is rotatably connected to a top turntable 314, and the inner wall of the top turntable 314 is fixedly sleeved with a rotating motor 315, and the top turntable 314 is driven to rotate by the rotating motor 315, the top turntable 314 is driven to rotate by the rotating belt 313, and the rotating belt 313 is driven to rotate by the bottom turntable 312, so that the bottom turntable 312 rotates and drives the rotating drum 302 to rotate, so that the strings can be wound.

[0041] In a preferred embodiment, a connecting bracket 406 is installed on the outer edge of the clamp 407, and the bottom of the connecting bracket 406 is slidably connected to the top rail 404. The connecting bracket 406 can move on the top rail 404, and the top rail 404 plays a limiting role, ensuring that the connecting bracket 406 and the clamp 407 can move horizontally, thereby improving the stability of the device. A mobile bracket 402 is installed on the bottom of the top rail 404, and the bottom of the mobile bracket 402 is slidably connected to the bottom rail 403. The bottom rail 403 plays a limiting role on the mobile bracket 402, so that the mobile bracket 402 can move horizontally. The outer edge of the mobile bracket 402 is fixedly equipped with a mounting plate 409, and the winding assembly 408 is installed on the mounting plate 409.

[0042] In a preferred embodiment, the inner wall of the connecting bracket 406 is threadedly connected with a moving motor screw rod 405, and the moving motor screw rod 405 is installed on the moving bracket 402. The operation of the moving motor screw rod 405 can drive the connecting bracket 406 to move back and forth, so that the movement of the connecting bracket 406 drives the clamping jaw 407 to move toward the winding assembly 408. The inner wall of the mobile bracket 402 is threadedly connected with the moving motor screw rod 401, and the moving motor screw rod 401 is installed on the equipment warehouse 2. Through the operation of the moving motor screw rod 401, the clamping jaw 407 and the winding assembly 408 can be driven to move outward, so that the winding assembly 408 and the clamping jaw 407 are not on the same line, so that the clamping jaw 407 can move toward the winding assembly 408, thereby improving the rationality of the device.

[0043] In a preferred embodiment, the winding assembly 408 includes a vertical plate 4081, and the outer edges of the two ends of the bottom of the vertical plate 4081 are fixedly equipped with bottom rollers 4082, and the top rollers 4085 are fixedly equipped with the top of the bottom rollers 4082. The top rollers 4085 and the inner wall of the bottom rollers 4082 are rotatably connected with a rotating circle 4087. The bottom rollers 4082 and the top rollers 4085 play a role in limiting the rotating circle 4087, so that the rotating circle 4087 can rotate on the bottom rollers 4082 and the top rollers 4085. The outer edges of the rotating circle 4087 and the vertical plate 4081 are both provided with vertical grooves 408 8. By using the vertical groove 4088, the string circle can enter the center position of the rotating circle 4087 through the vertical groove 4088. A driving wheel 4084 is provided on the top of the vertical plate 4081. The inner wall of the driving wheel 4084 is fixedly sleeved on the power output shaft of the driving motor 4083. A driving belt 4086 is installed on the outer edge of the top roller 4085 and the driving wheel 4084. At the same time, the top roller 4085 also plays a role in fixing the driving belt 4086, so that the driving belt 4086 can contact with the rotating circle 4087. The rotation of the driving belt 4086 can drive the rotating circle 4087 to rotate.

[0044] In a preferred embodiment, a fixed bracket 4089 is fixedly installed on the outer edge of the vertical plate 4081, and a rotating turntable 40810 is fixedly installed on the end of the fixed bracket 4089 away from the vertical plate 4081. A rotating reduction motor 40811 is fixedly installed on the outer edge of the rotating turntable 40810. The rotating reduction motor 40811 is installed on the mounting plate 409. The rotating turntable 40810 is driven to rotate by the operation of the rotating reduction motor 40811, so that the center position of the rotating circle 4087 can rotate around the string circle, and rotate from the top to the bottom of the clamp 407.

[0045] In a preferred embodiment, the inner wall of the top of the rotating circle 4087 is movably connected with a horizontal axis 40812, and the horizontal axis 40812 can rotate on the rotating circle 4087, so that the strings can be rotated when winding, so that the strings cannot be twisted, and the outer edge of the horizontal axis 40812 is fixedly equipped with an outer shell 40813, and the inner cavity of the outer shell 40813 is provided with a clamping plate 40814, and the top of the clamping plate 40814 is fixedly equipped with a vertical rod 40815, and the vertical rod 40815 is fixedly equipped with a vertical rod 40815. 815 passes through the outer shell 40813, and the outer edge of the vertical rod 40815 is movably sleeved with a clamping spring 40816, the bottom of the inner cavity of the outer shell 40813 is installed with a bottom rubber tooth piece 40818, and the bottom of the clamping plate 40814 is installed with a top rubber tooth piece 40817. By placing the end of the string under the clamping plate 40814, the clamping plate 40814 is supported by the elastic force of the clamping spring 40816, so that the end of the string can be clamped.

[0046] Working principle: when in use, one end of the string is put on the hanging rod 316, the string is placed on the top of the circle piece 307, and then the tail end of the string is placed between the top rubber tooth piece 40817 and the bottom rubber tooth piece 40818, and the clamping spring 40816 supports the clamping plate 40814, so that the top rubber tooth piece 40817 and the bottom rubber tooth piece 40818 clamp the string, and then the top turntable 314 is driven to rotate by the rotating motor 315, and the rotation of the top turntable 314 drives the rotating belt 313 to rotate, and the rotation of the rotating belt 313 drives the bottom turntable The disc 312 rotates, and the bottom turntable 312 rotates to drive the pneumatic telescopic rod 311, the conical column 304, the contact piece 309, the connecting block 308, the movable rod 306, the supporting spring 310 and the rotating drum 302 to rotate. At this time, the string is wound on the ring piece 307, and the string forms a circle. At this time, the remaining length of the string is the circumference of the wound string. Then, the connecting bracket 406 and the clamping claw 407 are driven to move toward the hanging rod 316 by moving the motor screw rod 2 405, and the string is clamped by the clamping claw 407. After the clamping is completed, the pneumatic telescopic rod 311 is retracted to drive the conical column 304, the contact piece 309, the connecting block 308, the movable rod 306, the supporting spring 310 and the rotating drum 302 to rotate. The column 304 moves, and the movable rod 306 moves in the circular hole 305, so that the diameter of the circle piece 307 becomes smaller, and the circle piece 307 does not tension the strings. Then, the movable bracket 402 is driven to move outward by the movable motor screw rod 1 401, and then the movable motor screw rod 2 405 drives the connecting bracket 406, the clamping claw 407 and the strings on the clamping claw 407 to move toward the winding component 408. At this time, the string circle reaches the center position of the rotating circle 4087 through the vertical slot 4088, and then the rotating reducer motor 40811 is driven to rotate the turntable 40810 and the fixed support 40810. The frame 4089, the vertical plate 4081 and the rotating circle 4087 rotate to the top of the clamp 407, and then the rotating reduction motor 40811 drives the rotating turntable 40810, the fixed bracket 4089, the vertical plate 4081 and the rotating circle 4087 to rotate from the top of the clamp 407 to the bottom of the clamp 407. During the rotation, the driving motor 4083 drives the driving wheel 4084 to rotate, and the driving wheel 4084 drives the driving belt 4086, the top roller 4085 and the rotating circle 4087 to rotate, and the strings clamped on the outer shell 40813 are wound around the string ring.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic string winding machine for producing musical instrument strings, comprising a base (1), characterized in that: The back of the base (1) is fixedly equipped with a device bin (2), the inner wall of the device bin (2) is fixedly equipped with a winding device (3), and the top of the base (1) is installed with a winding device (4); The winding device (3) comprises a mounting bracket (301), the inner wall of the mounting bracket (301) is movably connected to a rotating drum (302), the outer wall of the rotating drum (302) is provided with a circular hole (305), the inner wall of the circular hole (305) is movably connected to a movable rod (306), one end of the movable rod (306) is fixedly equipped with a coil piece (307), and the outer wall of the rotating drum (302) is fixedly equipped with a hanging rod (316); The winding device (4) comprises a clamping jaw (407), and a winding assembly (408) is provided on the right side of the clamping jaw (407).

2. The automatic string winding machine for string production according to claim 1, characterized in that: The inner wall of the rotating drum (302) is provided with a sliding groove (303), the inner wall of the sliding groove (303) is slidably connected to a conical column (304), and the outer edge of the conical column (304) is slidably connected to a contact piece (309).

3. The automatic string winding machine for string production according to claim 2, characterized in that: A connecting block (308) is fixedly mounted on the outer edge of the contact piece (309), the connecting block (308) is movably connected to the movable rod (306), and a supporting spring (310) is movably sleeved on the outer edge of the movable rod (306).

4. The automatic string winding machine for string production according to claim 3, characterized in that: A pneumatic telescopic rod (311) is installed at one end of the conical column (304) away from the movable rod (306), and the pneumatic telescopic rod (311) is connected to the air pipe through a rotating joint.

5. The automatic string winding machine for string production according to claim 4, characterized in that: The outer wall of the pneumatic telescopic rod (311) is fixedly equipped with a bottom turntable (312), the outer wall of the bottom turntable (312) is rotatably connected to a rotating belt (313), the inner wall of the rotating belt (313) is rotatably connected to a top turntable (314), and the inner wall of the top turntable (314) is fixedly sleeved with a rotating motor (315).

6. The automatic string winding machine for string production according to claim 1, characterized in that: A connecting bracket (406) is installed on the outer edge of the clamp (407), the bottom of the connecting bracket (406) is slidably connected to the top track (404), the bottom of the top track (404) is installed with a movable bracket (402), the bottom of the movable bracket (402) is slidably connected to the bottom track (403), the outer edge of the movable bracket (402) is fixedly equipped with a mounting plate (409), and the winding assembly (408) is mounted on the mounting plate (409).

7. The automatic string winding machine for producing musical strings according to claim 6, characterized in that: The inner wall of the connecting bracket (406) is threadedly connected to the movable motor screw rod 2 (405), and the movable motor screw rod 2 (405) is installed on the movable bracket (402). The inner wall of the movable bracket (402) is threadedly connected to the movable motor screw rod 1 (401), and the movable motor screw rod 1 (401) is installed on the equipment warehouse (2).

8. The automatic string winding machine for producing musical strings according to claim 1, characterized in that: The winding assembly (408) comprises a vertical plate (4081), bottom rollers (4082) are fixedly mounted on the outer edges of the two ends of the bottom of the vertical plate (4081), a top roller (4085) is fixedly mounted on the top of the bottom roller (4082), a rotating circle (4087) is rotatably connected between the top roller (4085) and the inner wall of the bottom roller (4082), a vertical groove (4088) is formed on the outer edges of the rotating circle (4087) and the vertical plate (4081), a driving wheel (4084) is disposed on the top of the vertical plate (4081), the inner wall of the driving wheel (4084) is fixedly sleeved on the power output shaft of the driving motor (4083), and a driving belt (4086) is installed on the outer edges of the top roller (4085) and the driving wheel (4084).

9. The automatic string winding machine for producing musical strings according to claim 8, characterized in that: The outer edge of the vertical plate (4081) is fixedly equipped with a fixed bracket (4089), and the end of the fixed bracket (4089) away from the vertical plate (4081) is fixedly equipped with a rotating turntable (40810), and the outer edge of the rotating turntable (40810) is fixedly equipped with a rotating reduction motor (40811), and the rotating reduction motor (40811) is installed on the mounting plate (409).

10. The automatic string winding machine for producing musical strings according to claim 9, characterized in that: The inner wall at the top of the rotating circle (4087) is movably connected with a transverse axis (40812), the outer edge of the transverse axis (40812) is fixedly equipped with an outer shell (40813), the inner cavity of the outer shell (40813) is provided with a clamping plate (40814), the top of the clamping plate (40814) is fixedly equipped with a vertical rod (40815), the vertical rod (40815) penetrates the outer shell (40813), and the outer edge of the vertical rod (40815) is movably sleeved with a clamping spring (40816), the bottom of the inner cavity of the outer shell (40813) is installed with a bottom rubber tooth piece (40818), and the bottom of the clamping plate (40814) is installed with a top rubber tooth piece (40817).

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