CN216101376U

CN216101376U - Tire puller

Info

Publication number: CN216101376U
Application number: CN202121260462.9U
Authority: CN
Inventors: 余良松; 彭力; 匡强
Original assignee: Sinohydro Bureau 12 Co Ltd
Current assignee: Sinohydro Bureau 12 Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-03-22
Anticipated expiration: 2031-06-07

Abstract

The utility model provides a tire puller. The tire puller comprises a support frame; a support mechanism; the prying mechanism is rotatably connected with the top end of the support frame; the tire pulling mechanism is fixedly connected with one end of the prying mechanism and comprises a wane, a fixed sleeve and a screw rod, one end of the prying mechanism is fixedly connected with the fixed sleeve, the inner part of the fixed sleeve is in threaded connection with the side wall of the screw rod, and the wane with a V-shaped side wall is mounted at the bottom end of the screw rod; the rotating mechanism is arranged at the joint of the screw rod and the warping plate; the limiting mechanism is rotatably connected with the inside of the rotating mechanism; the fixing mechanism is connected with the side wall of the supporting frame in a sliding mode, and one end of the fixing mechanism penetrates through the top end of the warping plate. The tire puller provided by the utility model is convenient for separating a steel ring from a tire.

Description

Tire puller

Technical Field

The utility model relates to the technical field of tire processing, in particular to a tire puller.

Background

A tire is a ground-rolling circular ring-shaped elastic rubber article mounted on various vehicles or machines. Generally mounted on a metal rim, and is capable of supporting a vehicle body, buffering external impact, achieving contact with a road surface and ensuring the driving performance of a vehicle.

After the tire bursts, the steel rim and the tire need to be separated for tire replacement, but the labor and time are wasted when the steel rim is manually unloaded, and the difficulty is high.

Therefore, there is a need to provide a new tire puller to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of providing a tire puller which is convenient for separating a steel ring from a tire.

In order to solve the above technical problems, the present invention provides a tire puller comprising: a support frame; the side wall of the supporting mechanism is fixedly connected with the supporting frame; the prying mechanism is rotatably connected with the top end of the support frame; the tire pulling mechanism is fixedly connected with one end of the prying mechanism and comprises a wane, a fixed sleeve and a screw rod, one end of the prying mechanism is fixedly connected with the fixed sleeve, the inner part of the fixed sleeve is in threaded connection with the side wall of the screw rod, and the wane with a V-shaped side wall is mounted at the bottom end of the screw rod; the rotating mechanism is arranged at the joint of the screw rod and the warping plate; the limiting mechanism is rotatably connected with the inside of the rotating mechanism; the fixing mechanism is connected with the side wall of the supporting frame in a sliding mode, and one end of the fixing mechanism penetrates through the top end of the warping plate.

Preferably, the supporting mechanism comprises steel balls, a connecting rod and a supporting plate, the side wall of the supporting plate is fixedly connected with the arc-shaped supporting frame, the connecting rod is symmetrically installed at the edge of the bottom surface of the supporting plate, and the steel balls are connected with the bottom end of the connecting rod in a rolling mode.

Preferably, the prying mechanism comprises a connecting sleeve, a supporting rod, a limiting ring, a clamping groove and a fixing block, one end of the supporting rod is fixedly connected with the fixing sleeve, and the other end of the supporting rod is provided with the fixing block; the clamping groove is formed in the top end of the supporting frame, and the clamping groove is connected with the fixing block in a rotating mode; the lateral wall installation of bracing piece the spacing ring, the inside of adapter sleeve with the top of support frame with threaded connection between the other end of bracing piece, just one end of adapter sleeve is contradicted the spacing ring.

Preferably, the length of the connecting sleeve is greater than that of the fixing block, and the rotating angle of the fixing block is 90 degrees.

Preferably, the rotating mechanism comprises a limiting sleeve, a sliding groove, a ball and a connecting frame, the bottom end of the screw is fixedly connected with the connecting frame, the top surface of the wane is fixedly connected with the limiting sleeve, and the sliding groove with a T-shaped side wall is arranged in the limiting sleeve; the inside of spout is rotated and is connected the link, the bottom equidistance of link rotates and connects a plurality ofly the ball, a plurality of the ball with the inside and the lateral wall roll connection of spout.

Preferably, the limiting mechanism comprises a groove, a limiting screw rod, a spring and a limiting rod, the groove is arranged inside the bottom end of the limiting sleeve, the inner side of the groove is slidably connected with the limiting rod of which the side wall is L-shaped, and one end of the limiting rod is slidably connected with the side wall of the connecting frame which is abutted against the inner side of the sliding groove; the spring is installed between the bottom surface of the limiting rod and the bottom surface of the groove, the other end of the limiting rod abuts against the limiting screw, and the limiting screw is in threaded connection with the top end of the groove.

Preferably, the fixing mechanism comprises a first fixing rod, a fixing screw rod and a second fixing rod, the side wall of the support frame is in sliding connection with the second fixing rod, the second fixing rod is in sliding connection with the first fixing rod, the first fixing rod penetrates through the top end of the wane, one end of the second fixing rod is in threaded connection with the fixing screw rod, and the bottom end of the fixing screw rod abuts against the side wall of the first fixing rod.

Compared with the related art, the tire pulling device provided by the utility model has the following beneficial effects:

the utility model provides a tire extractor, wherein the prying mechanism is installed at the top end of a support frame, one end of the prying mechanism is fixedly connected with a fixed sleeve, the inside of the fixed sleeve is in threaded connection with the side wall of a screw, the rotating mechanism is installed at the bottom end of the screw, a limiting mechanism is rotatably connected with the inside of the rotating mechanism, and the bottom end of the rotating mechanism is rotatably connected with a warped plate with a V-shaped side wall; the fixing mechanism is connected with the side wall of the support frame in a sliding mode, and one end of the fixing mechanism penetrates through the top end of the warping plate; when a tire and a steel ring need to be separated, the fixing mechanism penetrates through the wane, the wane is fixed, the screw rod is rotated, the screw rod rotates and descends in the fixing sleeve, the screw rod drives the rotating mechanism to rotate at the top end of the wane, the side wall of the wane is fixed by the fixing mechanism, the wane does not rotate, the wane and the fixing mechanism vertically descend, the wane vertically enters the joint of the tire and the steel ring, then the fixing mechanism is separated from the wane, the limiting mechanism slides upwards to fix the wane, the rotating mechanism and the screw rod by the limiting mechanism, the screw rod is rotated downwards, the wane continuously enters the joint of the tire and the steel ring, and meanwhile the screw rod drives the wane to rotate in the tire and the steel ring to separate the tire and the steel ring, the prying mechanism is opened, the screw is extruded, the steel ring is pried upwards by utilizing the lever principle, and the steel ring is enabled to fall off from the tire rapidly, so that time and labor are saved.

Drawings

FIG. 1 is a schematic structural view of a tire extractor according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the rotating mechanism shown in FIG. 1;

fig. 3 is an exploded view of the internal structure of the prying mechanism shown in fig. 1.

Reference numbers in the figures: 1. the support frame, 2, prying mechanism, 21, adapter sleeve, 22, the bracing piece, 23, the spacing ring, 24, the draw-in groove, 25, the fixed block, 3, pull out child mechanism, 31, the wane, 32, fixed cover, 33, the screw rod, 4, slewing mechanism, 41, the stop collar, 42, the spout, 43, the ball, 44, the link, 5, supporting mechanism, 51, the steel ball, 52, the connecting rod, 53, the backup pad, 6, fixed establishment, 61, first dead lever, 62, clamping screw, 63, the second dead lever, 7, limiting mechanism, 71, the recess, 72, clamping screw, 73, the spring, 74, the gag lever post.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a tire extractor according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of the internal structure of the rotating mechanism shown in FIG. 1; fig. 3 is an exploded view of the internal structure of the prying mechanism shown in fig. 1. The tire puller comprises: a support frame 1; the side wall of the supporting mechanism 5 is fixedly connected with the supporting frame 1; the prying mechanism 2 is rotatably connected with the top end of the support frame 1; the tire pulling mechanism 3 is fixedly connected with one end of the prying mechanism 2, the tire pulling mechanism 3 comprises a wane 31, a fixed sleeve 32 and a screw 33, one end of the prying mechanism 2 is fixedly connected with the fixed sleeve 32, the inner part of the fixed sleeve 32 is in threaded connection with the side wall of the screw 33, and the wane 31 with a V-shaped side wall is mounted at the bottom end of the screw 33; the rotating mechanism 4 is installed at the joint of the screw 33 and the rocker 31; the limiting mechanism 7 is connected with the inside of the rotating mechanism 4 in a rotating mode; fixing mechanism 6, fixing mechanism 6 with the lateral wall sliding connection of support frame 1, just fixing mechanism 6's one end runs through the top of wane 31.

The supporting mechanism 5 comprises steel balls 51, a connecting rod 52 and a supporting plate 53, the side wall of the supporting plate 53 is fixedly connected with the side wall in an arc shape, the supporting frame 1 is provided with the connecting rod 52 symmetrically arranged at the edge of the bottom surface of the supporting plate 53, the steel balls 51 are connected with the bottom end of the connecting rod 52 in a rolling manner, the supporting plate 53 pushes the connecting rod 52 to slide when the supporting plate 53 slides on the ground, the connecting rod 52 pushes the steel balls 51 to roll on the ground, the friction force between the steel balls 51 and the ground is reduced, and the supporting plate 53 can slide on the ground conveniently.

The prying mechanism 2 comprises a connecting sleeve 21, a supporting rod 22, a limiting ring 23, a clamping groove 24 and a fixing block 25, one end of the supporting rod 22 is fixedly connected with the fixing sleeve 32, and the other end of the supporting rod 22 is provided with the fixing block 25; the clamping groove 24 is formed in the top end of the support frame 1, and the fixing block 25 is rotatably connected to the inside of the clamping groove 24; the limit ring 23 is installed on the side wall of the support rod 22, the inside of the connecting sleeve 21 is in threaded connection with the top end of the support frame 1 and the other end of the support rod 22, one end of the connecting sleeve 21 abuts against the limit ring 23, so that the connecting sleeve 21 can be rotated conveniently, the connecting sleeve 21 can enter the side wall of the support frame 1 from the side wall of the support rod 22, the fixed block 25 can be separated from the inside of the connecting sleeve 21, the fixed block 25 can be driven by the screw 33 to rotate in the clamping groove 25 conveniently, the lever principle is utilized, the top end of the support frame 1 serves as a fulcrum, the screw 33 can be rotated conveniently, the rocker 31 can rotate upwards, and the rocker 31 can pry a steel ring; and do not rotate during the screw rod 33, rotate the adapter sleeve 21, make the adapter sleeve 21 gets into the lateral wall of bracing piece 22, the adapter sleeve 21 with the bracing piece 22 lateral wall the spacing ring 23 is contradicted, makes the adapter sleeve 21 will the bracing piece 22 with the support frame 1 is fixed, will the bracing piece 22 is fixed, prevents the screw rod 33 rotates.

The length of the connecting sleeve 21 is greater than that of the fixing block 25, so that the connecting sleeve 21 is convenient for wrapping the fixing block 25, the connecting sleeve 21 is used for fixing the fixing block 25, the fixing block 25 is prevented from rotating when the screw 33 does not need to be rotated, and the screw 33 is convenient to fix; and the rotation angle of the fixed block 25 is 90 °, for convenience the screw 33 rotates 90 °, so that the rocker 31 tilts to tilt the leather collar from the inside of the tire.

The rotating mechanism 4 comprises a limiting sleeve 41, a sliding groove 42, a ball 43 and a connecting frame 44, the bottom end of the screw rod 33 is fixedly connected with the connecting frame 44, the top surface of the rocker 31 is fixedly connected with the limiting sleeve 41, and the sliding groove 42 with a T-shaped side wall is arranged inside the limiting sleeve 41; the inside of the sliding chute 42 is rotatably connected with the connecting frame 44, the bottom end of the connecting frame 44 is rotatably connected with the plurality of balls 43 at equal intervals, the plurality of balls 43 are in rolling connection with the inside and the side wall of the sliding chute 42, in order to facilitate the rotation of the screw rod 33, when the rocker 31 descends vertically and linearly, the screw rod 33 drives the connecting frame 44 to rotate inside the sliding chute 42, the screw rod 33 and the connecting frame 44 descend rotationally, the connecting frame 44 drives the limiting sleeve 41 to descend vertically, and the limiting sleeve 41 drives the rocker 31 to descend vertically; and when the connecting frame 44 rotates, the connecting frame 44 drives the ball 43 to roll in the chute 42, so as to reduce the friction between the ball 43 and the inside of the position-limiting sleeve 41, thereby facilitating the rotation of the connecting frame 44.

The limiting mechanism 7 comprises a groove 71, a limiting screw 72, a spring 73 and a limiting rod 74, the groove 71 is arranged inside the bottom end of the limiting sleeve 41, the limiting rod 74 with an L-shaped side wall is slidably connected inside the groove 71, and one end of the limiting rod 74 is slidably connected with the side wall of the connecting frame 44 abutted against the inside of the sliding groove 42; the spring 73 is arranged between the bottom surface of the limiting rod 74 and the bottom surface of the groove 71, the other end of the limit rod 74 props against the limit screw 72, the limit screw 72 is in threaded connection with the top end of the groove 71, in order to rotate the limit screw 72 upwards when the screw 33 needs to drive the rocker 31 to rotate in the steel ring, the limit screw 72 moves upwards in the groove 71, and the spring 73 pushes the limit rod 74 upwards to support and move in the groove 71, so that the limit rod 74 linearly enters the sliding groove 42 and abuts against the side wall of the connecting frame 44, the connecting frame 44 is fixed, the connecting frame 44 and the ball 43 are prevented from rotating in the limit sleeve 41, the limit rod 74, the steel ball 43 and the limit sleeve 41 are fixed together, and the screw 33 drives the limit sleeve 41 and the warping plate 31 to rotate.

The fixing mechanism 6 includes a first fixing rod 61, a fixing screw 62 and a second fixing rod 63, the side wall of the supporting frame 1 is slidably connected to the second fixing rod 63, the inside of the second fixing rod 63 is slidably connected to the first fixing rod 61, the first fixing rod 61 penetrates through the top end of the rocker 31, one end of the second fixing rod 63 is in threaded connection with the fixing screw 62, and the bottom end of the fixing screw 62 abuts against the side wall of the first fixing rod 61, so that when the rocker 31 descends vertically, the first fixing rod 61 slides out from the inside of the second fixing rod 63, the first fixing rod 61 penetrates through the rocker 31, the fixing screw 62 is rotated to abut against the first fixing rod 61, the first fixing rod 61 is fixed inside the second fixing rod 63, and the first fixing rod 61 fixes the rocker 31, so that the rocker 31 drives the fixing mechanism 6 to vertically descend on the side wall of the support frame 1.

The working principle of the tire puller provided by the utility model is as follows: the tire is placed on the top surface of the supporting plate 53, the screw 33 is rotated to enable the rocker 31 to rotate, the rocker 31 is vertically located at the joint of the tire and the steel ring, at the moment, the rocker 31 is perpendicular to the side wall of the supporting frame 1, the second fixing rod 63 is rotated upwards to enable the second fixing rod 63 to be flush with the top end of the rocker 31, the fixing screw 62 is rotated to enable the fixing screw 62 to be separated from the side wall of the first fixing rod 61, the first fixing rod 61 slides out of the second fixing rod 63, the first fixing rod 61 penetrates through the top end of the rocker 31, the fixing screw 62 is rotated downwards to enable the fixing screw 62 to abut against the first fixing rod 61, and the first fixing rod 61 is fixed inside the second fixing rod 63. The limiting screw 72 is rotated downwards, the limiting screw 72 slides upwards in the groove 71, the limiting screw 72 downwards extrudes the limiting rod 74 with an L-shaped side wall, the limiting rod 74 completely enters the groove 71 from the inside of the sliding groove 42, the spring 73 in the groove 71 is compressed when the limiting rod 74 moves, and the limiting rod 74 is separated from the connecting frame 44. The screw 33 is rotated downwards, the screw 33 rotates and descends in the fixed sleeve 32, the screw 33 drives the connecting frame 44 to rotate in the chute 42, the screw 33 and the connecting frame 44 rotate and descend, the connecting frame 44 drives the limiting sleeve 41 to vertically descend, the limiting sleeve 41 drives the rocker 31 to vertically descend, the top end of the rocker 31 is fixed by the first fixing rod 61, the rocker 31 is fixed and does not rotate, and the rocker 31 drives the fixing mechanism 6 to vertically descend on the side wall of the support frame 1; and when the connecting frame 44 rotates, the connecting frame 44 drives the ball 43 to roll in the chute 42, so as to reduce the friction between the ball 43 and the inside of the position-limiting sleeve 41, thereby facilitating the rotation of the connecting frame 44. The rocker 31 is descended vertically, the rocker 31 vertically enters the joint of the tire and the steel rim, the limit screw 72 is rotated upwards, the limit screw 72 moves upwards in the groove 71, the spring 73 pushes the limit rod 74 upwards to support and move in the groove 71, the limit rod 74 linearly enters the chute 42 and abuts against the side wall of the connecting frame 44 to fix the connecting frame 44, the connecting frame 44 and the ball 43 are prevented from rotating in the limit sleeve 41 when the screw 33 rotates, the limit rod 74, the steel ball 43 and the limit sleeve 41 are fixed together, and the first fixing rod 61 enters the second fixing rod 63 by rotating the fixing screw 62 to separate the first fixing rod 61 and the rocker 31; and then the screw 33 is rotated downwards, the screw 33 drives the limiting sleeve 41 and the warped plate 31 to rotate, the warped plate 31 rotates between the rim and the tire, and the warped plate 31 continues to enter the inner parts of the rim and the tire, so that the tire is separated from the rim. The connecting sleeve 21 is rotated to enable the connecting sleeve 21 to enter the side wall of the support frame 1 from the side wall of the support rod 22, the fixed block 25 slowly slides out of the connecting sleeve 21, the screw rod 33 is rotated, the screw rod 33 drives the fixed block 25 to rotate in the clamping groove 25, the screw rod 33 rotates downwards to enable the rocker 31 to rotate upwards by taking the top end of the support frame 1 as a fulcrum by utilizing the lever principle, so that the rocker 31 prizes up the steel ring, and the steel ring is separated from the tire again; when the supporting plate 53 is rotated, the tire is slid on the top surface of the supporting plate 53, the rocker 31 is uniformly contacted with the joint of the tire and the steel rim, and the joint of the tire and the steel rim is separated; when the support plate 53 pushes the connecting rod 52 to slide, the connecting rod 52 pushes the steel ball 51 to roll on the ground, so that the friction between the steel ball 51 and the ground is reduced, and the support plate 53 is convenient to slide on the ground. Rotate screw rod 33 again and reset, rotate adapter sleeve 21 makes adapter sleeve 21 gets into the lateral wall of bracing piece 22, adapter sleeve 21 with the lateral wall of bracing piece 22 spacing ring 23 is contradicted, makes adapter sleeve 21 will bracing piece 22 with support frame 1 is fixed, will bracing piece 22 is fixed, makes bracing piece 22 does not rotate, upwards rotates screw rod 22, makes screw rod 22 drives wane 31 takes out from between steel ring and the tire, takes out the inside of steel ring follow tire again.

the utility model provides a tire extractor, wherein the prying mechanism 2 is installed at the top end of a support frame 1, one end of the prying mechanism 2 is fixedly connected with a fixed sleeve 32, the inside of the fixed sleeve 32 is in threaded connection with the side wall of a screw 33, the rotating mechanism 4 is installed at the bottom end of the screw 33, a limiting mechanism 7 is in rotating connection with the inside of the rotating mechanism 4, and the bottom end of the rotating mechanism 4 is in rotating connection with a warping plate 31 with a V-shaped side wall; the fixing mechanism 6 is connected with the side wall of the support frame 1 in a sliding manner, and one end of the fixing mechanism 6 penetrates through the top end of the warping plate 31; when a tire and a rim need to be separated, the fixing mechanism 6 penetrates through the rocker 31, the rocker 31 is fixed, the screw 33 is rotated, the screw 33 rotates and descends in the fixing sleeve 32, the screw 33 drives the rotating mechanism 4 to rotate at the top end of the rocker 31, the side wall of the rocker 31 is fixed by the fixing mechanism 6, the rocker 31 does not rotate, the rocker 31 and the fixing mechanism 6 vertically descend, the rocker 31 vertically enters the joint of the tire and the rim, the fixing mechanism 6 is separated from the rocker 31, the limiting mechanism 7 slides upwards, the limiting mechanism 7 fixes the rocker 31 and the rotating mechanism 4 and the screw 33, the rocker 31 continuously enters the joint of the tire and the rim after the screw 33 rotates downwards, and the screw 33 drives the rocker 31 to rotate in the tire and the rim, the tire and the steel ring are separated, the prying mechanism 2 is opened, the screw 33 is extruded, and the steel ring is pried upwards by utilizing the lever principle, so that the steel ring is rapidly separated from the tire, and time and labor are saved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A tire puller, comprising:

a support frame;

the side wall of the supporting mechanism is fixedly connected with the supporting frame;

the prying mechanism is rotatably connected with the top end of the support frame;

the tire pulling mechanism is fixedly connected with one end of the prying mechanism and comprises a wane, a fixed sleeve and a screw rod, one end of the prying mechanism is fixedly connected with the fixed sleeve, the inner part of the fixed sleeve is in threaded connection with the side wall of the screw rod, and the wane with a V-shaped side wall is mounted at the bottom end of the screw rod;

the rotating mechanism is arranged at the joint of the screw rod and the warping plate;

the limiting mechanism is rotatably connected with the inside of the rotating mechanism;

the fixing mechanism is connected with the side wall of the supporting frame in a sliding mode, and one end of the fixing mechanism penetrates through the top end of the warping plate.

2. The tire extractor as claimed in claim 1, wherein the support mechanism comprises steel balls, a connecting rod and a support plate, the side wall of the support plate is fixedly connected with the support frame, the side wall of the support plate is arc-shaped, the connecting rod is symmetrically installed at the edge of the bottom surface of the support plate, and the steel balls are connected with the inside of the bottom end of the connecting rod in a rolling manner.

3. The tire extractor as claimed in claim 1, wherein the prying mechanism comprises a connecting sleeve, a supporting rod, a limiting ring, a clamping groove and a fixing block, one end of the supporting rod is fixedly connected with the fixing sleeve, and the other end of the supporting rod is provided with the fixing block; the clamping groove is formed in the top end of the supporting frame, and the clamping groove is connected with the fixing block in a rotating mode; the lateral wall installation of bracing piece the spacing ring, the inside of adapter sleeve with the top of support frame with threaded connection between the other end of bracing piece, just one end of adapter sleeve is contradicted the spacing ring.

4. The tire extractor as claimed in claim 3, wherein the length of the connection sleeve is greater than the length of the fixing block, and the rotation angle of the fixing block is.

5. The tire extractor as claimed in claim 1, wherein the rotating mechanism comprises a limiting sleeve, a sliding groove, a ball and a connecting frame, the bottom end of the screw rod is fixedly connected with the connecting frame, the top surface of the rocker is fixedly connected with the limiting sleeve, and the sliding groove with a T-shaped side wall is arranged inside the limiting sleeve; the inside of spout is rotated and is connected the link, the bottom equidistance of link rotates and connects a plurality ofly the ball, a plurality of the ball with the inside and the lateral wall roll connection of spout.

6. The tire extractor as claimed in claim 5, wherein the limiting mechanism comprises a groove, a limiting screw, a spring and a limiting rod, the groove is arranged inside the bottom end of the limiting sleeve, the limiting rod with an L-shaped inner sliding connecting side wall is arranged inside the groove, and one end of the limiting rod is in sliding connection with the side wall inside the sliding groove and abutting against the connecting frame; the spring is installed between the bottom surface of the limiting rod and the bottom surface of the groove, the other end of the limiting rod abuts against the limiting screw, and the limiting screw is in threaded connection with the top end of the groove.

7. The tire extractor of claim 6, wherein the fixing mechanism comprises a first fixing rod, a fixing screw rod and a second fixing rod, the side wall of the supporting frame is slidably connected to the second fixing rod, the inside of the second fixing rod is slidably connected to the first fixing rod, the first fixing rod penetrates through the top end of the rocker, one end of the second fixing rod is in threaded connection with the fixing screw rod, and the bottom end of the fixing screw rod abuts against the side wall of the first fixing rod.