Automobile and motorcycle accessory machining equipment

Abstract

The utility model discloses automobile and motorcycle accessory machining equipment, which belongs to the technical field of welding fixtures and comprises a fixing frame, a first fixing frame and a second fixing frame are respectively mounted at the outer end of the fixing frame, a mounting component is arranged at the bottom end of the first fixing frame, two fixing components are arranged at the bottom end of the mounting component, and two clamping components are arranged at the bottom end of the second fixing frame. A plurality of limiting assemblies are arranged at the outer end of the clamping assembly and the outer end of the mounting assembly, the clamping assembly can clamp the straight part of the tail end of the exhaust pipe through a clamping hook and an abutting device, the mounting assembly is arranged at the bottom end of the first fixing frame, and the fixing assembly is mounted on the third mounting plate. The fixing assembly drives the inner expansion blocks to move towards the outer side through the movable sleeves, the bent ends of the exhaust pipes are arranged on the outer peripheries of the inner expansion blocks in a sleeving mode, the exhaust pipes can be fixed from the interior through external expansion of the four inner expansion blocks, and the whole exhaust pipes can be clamped through cooperation of the fixing assembly and the clamping assembly. And a worker can conveniently weld the whole exhaust pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, and more specifically, to an automobile and motorcycle parts processing device. Background Art

[0002] The exhaust pipe is a relatively important accessory in a motorcycle. The motorcycle exhaust pipe needs to be fixed with a clamp during welding. When manufacturing or repairing a motorcycle exhaust pipe, the correct positioning and fixation of the exhaust pipe is very important to ensure the accuracy and quality of welding. It helps workers fix the exhaust pipe in the correct position and keep it stable for welding work, while also ensuring the accuracy and safety of welding.

[0003] Chinese patent publication number CN219852985U discloses a motorcycle exhaust pipe welding fixture. The fixture features a motor mounted on a support plate, connected to a pedal. A rotating shaft is connected to the motor via a pair of meshing gears. The rotating shaft includes a first turntable, which is equipped with a first positioning structure, a second positioning structure, and a positioning post located directly in the center of the first turntable. The first positioning structure includes a first fixing post, to which a stop post and a handle are connected. The second positioning structure includes multiple legs. This fixture solves the problem of prior art inability to assist in welding various exhaust pipe types, making it suitable for assisting in exhaust pipe welding.

[0004] However, motorcycle exhaust pipes are not straight. Usually, only the tail end of the exhaust pipe is straight, while the head end connected to the engine exhaust port is often curved to fit the surface of the motorcycle. When the device in the above solution clamps and fixes the exhaust pipe, the clamping effect on the curved end of the exhaust pipe is poor, making it inconvenient to clamp and connect the entire exhaust pipe, and thus it is inconvenient to clamp and weld multiple sections of the exhaust pipe together.

[0005] Therefore be necessary to provide a kind of automobile and motorcycle parts processing equipment to solve the above problems. Utility Model Content

[0006] The utility model provides an automobile and motorcycle parts processing device, which can improve the problem in the related art that the bent end of the exhaust pipe has a poor clamping effect, is inconvenient for clamping and docking the entire exhaust pipe, and thus cannot clamp multiple sections of the entire exhaust pipe together.

[0007] An embodiment of the present application provides an automobile and motorcycle parts processing equipment, including a fixed frame, wherein a fixed frame 1 and a fixed frame 2 are respectively installed on the outer ends of the fixed frame, a mounting assembly is provided at the bottom end of the mounting assembly, two fixed assemblies are provided at the bottom end of the fixed frame 2, and a plurality of limit assemblies are provided at the outer ends of the clamping assembly and the mounting assembly, and the fixed assembly includes a movable sleeve and a shell, the outer end of the movable sleeve is rotatably connected to a plurality of drive rods, and the plurality of drive rods are rotatably connected to a fixed rod at one end away from the movable sleeve, and a plurality of sliding grooves distributed in an annular shape and at equal distances are opened at the outer end of the shell, the fixed rod passes through the sliding groove, and the fixed rod is slidably connected to the sliding groove.

[0008] The above-mentioned technical solution in the embodiment of the present application has at least the following technical effects: two groups of clamping components are arranged below the fixing frame 2, and the clamping components can clamp the straighter part of the tail end of the exhaust pipe through the clamping hook and the abutment device. The mounting component is arranged at the bottom end of the fixing frame 1, and the fixing component is installed on the mounting plate 3. The fixing component drives the inner expansion block to move outward through the movable sleeve, and the bent end of the exhaust pipe is sleeved on the outer periphery of the inner expansion block. By expanding the four inner expansion blocks outward, the exhaust pipe can be fixed from the inside, and the entire exhaust pipe can be clamped by cooperating with the fixing component and the clamping component, which is convenient for the staff to weld the entire exhaust pipe.

[0009] In some embodiments, the limiting assembly includes a handle and a threaded rod 1, the inner side wall of the handle is fixedly connected to an inner gear ring, one end of the threaded rod 1 is fixedly connected to an outer gear ring matching the inner gear ring, the outer gear ring is installed on the inner side of the inner gear ring, the outer end of the threaded rod 1 is threadedly connected to a knob, and the outer end of the threaded rod 1 is sleeved with two gaskets.

[0010] In some embodiments, the clamping assembly includes a connecting rod 1, one end of the connecting rod 1 is rotatably connected to the bottom end of the fixed frame 2 through the limiting assembly, the end of the connecting rod 1 away from the fixed frame 2 is rotatably connected to the connecting rod 2 through the limiting assembly, and the end of the connecting rod 2 away from the connecting rod 1 is rotatably connected to the clamping hook through the limiting assembly, and an abutment device is installed at the outer end of the clamping hook.

[0011] In some embodiments, the mounting assembly includes a mounting plate 1, which is fixedly mounted on the bottom end of the fixing frame 1, and a mounting plate 2 is movably mounted on the outer end of the mounting plate 1 through a limiting assembly.

[0012] In some embodiments, the outer end of the second mounting plate is movably mounted with two adjustment plates one through the limiting assembly, the outer end of the first mounting plate is movably mounted with an adjustment plate two through the limiting assembly, and the outer end of the second mounting plate is movably mounted with a mounting plate three through the limiting assembly.

[0013] In some embodiments, the fixing assembly further includes a rotating block, which is fixedly mounted on the outer end of the mounting plate 3. The end of the rotating block away from the mounting plate 3 is fixedly connected to a fixing ring, and the shell is fixedly mounted on the inner side of the fixing ring.

[0014] In some embodiments, the fixing assembly also includes a rotating wheel, the outer end of which is rotatably connected to the inner wall of the shell through a retaining ring, the outer end of the rotating wheel is fixedly connected to a second threaded rod, the other end of the second threaded rod is rotatably connected to the inner wall of the shell, the movable sleeve is threadedly connected to the second threaded rod, the end of the fixing rod away from the driving rod is fixedly connected to an inner expansion block, and the outer end of the inner expansion block is detachably connected to a rubber block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the first overall structure of the utility model;

[0017] Figure 2 This is a second overall structural diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the clamping assembly of the present utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the limit assembly of the utility model;

[0020] Figure 5 This is a schematic diagram of the installation assembly structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the fixing assembly structure of the present utility model;

[0022] Figure 7 It is a partial enlarged structural diagram of the fixing component of the present invention.

[0023] Description of the numbers in the figure:

[0024] 1. Fixed frame;

[0025] 2. Fixed frame 1;

[0026] 3. Fixed frame 2;

[0027] 4. Clamping assembly; 41. Connecting rod 1; 42. Connecting rod 2; 43. Clamping hook; 44. Abutment device;

[0028] 5. Mounting assembly; 51. Mounting plate 1; 52. Mounting plate 2; 53. Adjustment plate 1; 54. Adjustment plate 2; 55. Mounting plate 3;

[0029] 6. Limit assembly; 61. Grip; 62. Inner gear ring; 63. Outer gear ring; 64. Threaded rod 1; 65. Knob; 66. Gasket;

[0030] 7. Fixed assembly; 71. Rotating block; 72. Fixed ring; 73. Housing; 74. Slide; 75. Rotating wheel; 76. Threaded rod 2; 77. Inner expansion block; 78. Movable sleeve; 79. Driving rod; 710. Fixed rod; 711. Rubber block. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] Based on this, the problem in the related art that the bent end of the exhaust pipe has a poor clamping effect, is inconvenient for clamping and docking the entire exhaust pipe, and thus cannot clamp multiple sections of the entire exhaust pipe together can be improved.

[0033] See also Figure 1-Figure 7 , a kind of automobile and motorcycle parts processing equipment, including a fixed frame 1, the outer ends of the fixed frame 1 are respectively installed with a fixed frame 1 2 and a fixed frame 2 3, the bottom end of the fixed frame 1 2 is provided with a mounting assembly 5, the bottom end of the mounting assembly 5 is provided with two fixing assemblies 7, the bottom end of the fixed frame 2 3 is provided with two clamping assemblies 4, the outer ends of the clamping assembly 4 and the mounting assembly 5 are provided with a plurality of limit assemblies 6, the fixing assembly 7 includes a movable sleeve 78 and a shell 73, the outer end of the movable sleeve 78 is rotatably connected to a plurality of drive rods 79, and the ends of the plurality of drive rods 79 away from the movable sleeve 78 are rotatably connected to a fixed rod 710, the outer end of the shell 73 is provided with a plurality of slide grooves 74 distributed in an annular shape and at equal distances, the fixing rod 710 passes through the slide groove 74, and the fixed rod 710 is slidably connected to the slide groove 74.

[0034] The device in this scheme is mainly used to clamp the exhaust pipe of automobile and motorcycle, so as to facilitate its welding. Since the exhaust pipe of motorcycle is not in a straight shape, usually only the tail end of the exhaust pipe is in a straight state, and the head end connected to the engine exhaust hole is mostly in a curved state in order to fit on the surface of the motorcycle. A fixing frame 1 2 and a fixing frame 2 3 are respectively installed at the outer ends of the fixing frame 1. The fixing frame 1 2 and the fixing frame 2 3 are both installed on the fixing frame 1 by bolts, so that the distance between the fixing frame 1 2 and the fixing frame 2 3 can be adjusted to adapt to exhaust pipes of different lengths. A fixing frame 2 3 is set below the fixing frame 2 Two groups of clamping components 4, the clamping component 4 can clamp the straighter part of the tail end of the exhaust pipe through the clamping hook 43 and the abutment device 44. The mounting component 5 is set at the bottom end of the fixing frame 2, and the fixing component 7 is installed on the mounting plate 3 55. The fixing component 7 drives the inner expansion block 77 to move outward through the movable sleeve 78, and the bent end of the exhaust pipe is set on the outer surround of the inner expansion block 77. By expanding the four inner expansion blocks 77 outward, the exhaust pipe can be fixed from the inside. The entire exhaust pipe can be clamped by cooperating with the fixing component 7 and the clamping component 4, which is convenient for the staff to weld the entire exhaust pipe.

[0035] Optionally, in some embodiments, see Figure 1 and Figure 4 The limiting assembly 6 includes a handle 61 and a threaded rod 64. The inner side wall of the handle 61 is fixedly connected to an inner gear ring 62. One end of the threaded rod 64 is fixedly connected to an outer gear ring 63 that matches the inner gear ring 62. The outer gear ring 63 is installed on the inner side of the inner gear ring 62. The outer end of the threaded rod 64 is threadedly connected to a knob 65. The outer end of the threaded rod 64 is sleeved with two gaskets 66.

[0036] The limit assembly 6 in this scheme is mainly used to adjust the rotationally connected parts. An inner gear ring 62 is fixed inside the handle 61. The inner gear ring 62 is provided with internal teeth, and the outer gear ring 63 is provided with external teeth. The inner gear ring 62 cooperates with the outer gear ring 63. The outer gear ring 63 is installed on the inner side of the inner gear ring 62, so that the handle 61 can drive the inner gear ring 62 to drive the outer gear ring 63, and the outer gear ring 63 drives the threaded rod 1 64 to rotate. The outer gear ring 63 is fixed to the outer end of the threaded rod 1 64, and the outer end of the threaded rod 1 64 is threadedly connected to the knob 65. Two gaskets 66 are also sleeved on the outer end of the threaded rod 1 64. The two gaskets 66 are located on both sides of the mounting component to increase friction. When the handle 61 or the knob 65 is rotated, the two gaskets 66 are brought close to each other, which can increase the rotation damping between the two parts, or the friction during movement. Since the exhaust pipe is light in weight, the damping during rotation or movement can be adjusted by the limit assembly 6 to achieve a fixing effect.

[0037] Optionally, in some embodiments, see Figure 3The clamping assembly 4 includes a connecting rod 41, one end of the connecting rod 41 is rotatably connected to the bottom end of the fixed frame 2 3 through a limiting assembly 6, the end of the connecting rod 41 away from the fixed frame 2 3 is rotatably connected to the connecting rod 2 42 through the limiting assembly 6, and the end of the connecting rod 2 42 away from the connecting rod 41 is rotatably connected to the clamping hook 43 through the limiting assembly 6, and the outer end of the clamping hook 43 is installed with an abutment device 44.

[0038] The clamping assembly 4 in this scheme is mainly used to clamp and fix the tail end of the exhaust pipe. The top end of the connecting rod 1 41 is rotatably installed on the bottom end of the fixing frame 2 3 through the limiting assembly 6, and the other end of the connecting rod 1 41 is rotatably connected to the connecting rod 2 42 through the limiting assembly 6. The bottom end of the connecting rod 2 42 is rotatably installed with the clamping hook 43 in the same way. By tightening the limiting assembly 6, the connecting rod 1 41, the connecting rod 2 42 and the clamping hook 43 can be prevented from rotating. If loosened a little, they can be rotated to adjust their position so that they can cooperate with the mounting assembly 5 to fix the exhaust pipe.

[0039] An abutment device 44 is installed on one of the claws of the clamping hook 43. The abutment device 44 is mainly composed of a screw and a friction block. The screw is threadedly connected to the clamping hook 43. The movement of the friction block is controlled by rotating the screw so that it abuts against the outer end of the exhaust pipe, thereby cooperating with the clamping hook 43 to fix the exhaust pipe to the inner side of the clamping hook 43, thereby improving its fixation stability.

[0040] Optionally, in some embodiments, see Figure 5 The mounting assembly 5 includes a mounting plate 51, which is fixedly mounted on the bottom end of the fixing frame 2, and a mounting plate 52 is movably mounted on the outer end of the mounting plate 51 through the limiting assembly 6.

[0041] The outer end of the second mounting plate 52 is movably mounted with two adjustment plates 53 through the limiting assembly 6, the outer end of the adjustment plate 1 53 is movably mounted with an adjustment plate 2 54 through the limiting assembly 6, and the outer end of the adjustment plate 2 54 is movably mounted with a mounting plate 3 55 through the limiting assembly 6.

[0042] The mounting assembly 5 in this scheme is mainly used to install the fixing assembly 7, and at the same time, the fixing assembly 7 can adjust the position. The mounting plate 1 51 is fixed to the bottom end of the fixing frame 1 2. The mounting plate 1 51 and the mounting plate 2 52 are both provided with movable grooves, which are connected together by the limit assembly 6 running through the movable grooves. When the limit assembly 6 is tightened, the mounting plate 1 51 and the mounting plate 2 52 can be fixed together. After loosening, the mounting plate 2 52 can be moved up and down. The bottom end of the mounting plate 2 52 is provided with two symmetrical arc grooves. The two adjustment plates 1 53 are installed on the arc grooves through the limit assembly 6. By control, the adjusting plate 1 53 can be moved along the arc groove track on the mounting plate 2 52. A movable groove is also provided on the adjusting plate 2 54, which can be moved on the adjusting plate 1 53 through the limiting component 6. Finally, the mounting plate 3 55 is also installed on the adjusting plate 2 54 through the limiting component 6. Through the control of the limiting component 6, the mounting plate 2 52, the adjusting plate 1 53, the adjusting plate 2 54 and the mounting plate 3 55 can all be movably adjusted to cooperate with the clamping component 4 to adapt to exhaust pipes of different shapes, increase its flexibility of use, and can be clamped and fixed when dealing with exhaust pipes with different bending curvatures.

[0043] Optionally, in some embodiments, see Figure 6 and Figure 7 The fixing assembly 7 also includes a rotating block 71, which is fixedly mounted on the outer end of the mounting plate 3 55. The end of the rotating block 71 away from the mounting plate 3 55 is fixedly connected to a fixing ring 72, and the shell 73 is fixedly mounted on the inner side of the fixing ring 72.

[0044] The fixing assembly 7 also includes a rotating wheel 75, the outer end of which is rotatably connected to the inner wall of the shell 73 through a retaining ring, the outer end of the rotating wheel 75 is fixedly connected to a threaded rod 2 76, the other end of the threaded rod 2 76 is rotatably connected to the inner wall of the shell 73, the movable sleeve 78 is threadedly connected to the threaded rod 2 76, and the end of the fixing rod 710 away from the driving rod 79 is fixedly connected to the inner expansion block 77, and the outer end of the inner expansion block 77 is detachably connected to a rubber block 711.

[0045] The fixing assembly 7 in this scheme is mainly used to fix the exhaust pipe bending section by expanding the exhaust pipe from the inside out. The rotating block 71 is fixed on the mounting plate 3 55, and the rotating block 71 is divided into two sections. The two sections are rotatably connected by a damping device. The principle is the same as that of the limit assembly 6. Both are fixed by clamping to increase the friction force. At the other end of the rotating block 71, a fixing ring 72 is fixed. The fixing ring 72 is annular and fixed to the outer surrounding of the shell 73, so that a gap is left between the shell 73 and the rotating block 71. Four sliding grooves 74 are provided at the outer end of the shell 73. At the end of the shell 73 close to the rotating block 71, a runner 75 is rotatably connected. The runner 75 is connected to the inner wall of the shell 73 by a clamping ring fixed at the outer end. Rotational connection, a threaded rod 2 76 is also fixed to the outer end of the rotating wheel 75, and the other end of the threaded rod 2 76 is rotationally connected to the inner wall of the shell 73, and the outer end of the threaded rod 2 76 is threadedly connected to a movable sleeve 78, and the outer end of the movable sleeve 78 is rotatably connected to the driving rod 79 in a circular and equidistant manner. The other end of each driving rod 79 is rotationally connected to a fixed rod 710, and the fixed rod 710 passes through the slide groove 74 and is slidably connected to the slide groove 74 through a limiting ring fixed on the outside. The limiting ring is mainly used to make the fixing rod 710 only slide in the slide groove 74, and the outer end of the fixed rod 710 is fixed with an inner expansion block 77, and the outer end of the inner expansion block 77 is detachably installed with a rubber block 711, which can increase its friction.

[0046] The end of the exhaust pipe is sleeved on the outer periphery of the shell 73, and then when the rotating wheel 75 is rotated, the threaded rod 76 can drive the movable sleeve 78 to move upward. At this time, the driving rod 79 will rotate and drive the fixed rod 710. Since the fixed rod 710 is slidably connected to the slide groove 74 through the limiting ring, the fixed rod 710 will be pushed outward by the driving rod 79. At this time, the rubber block 711 on the inner expansion block 77 will abut against the inner wall of the exhaust pipe, thereby limiting and fixing it by friction, so that it cooperates with the clamping assembly 4 to fix the entire exhaust pipe, making it convenient for the staff to perform welding operations.

[0047] Working principle: When using the device to clamp the exhaust pipe, first fix the straight end of the exhaust pipe to the clamping assembly 4. A contact device 44 is installed on one claw of the clamping hook 43. By turning the screw to control the movement of the friction block, it can be pressed against the outer end of the exhaust pipe, so that it can cooperate with the clamping hook 43 to fix the exhaust pipe to the inner side of the clamping hook 43. At this time, it is necessary to adjust the angle of the connecting rod 1 41, the connecting rod 2 42 and the clamping hook 43 by twisting the limit assembly 6, and then adjust the mounting plate 2 52. , adjusting plate 1 53, adjusting plate 2 54 and mounting plate 3 55 are positioned so that the curved section of the exhaust pipe can be sleeved on the outer periphery of the shell 73, and then the rotating wheel 75 is rotated to make the threaded rod 2 76 drive the movable sleeve 78 to move upward. At this time, the driving rod 79 will rotate and drive the fixed rod 710 to move outward. At this time, the rubber block 711 on the inner expansion block 77 will abut against the inner wall of the exhaust pipe, thereby limiting and fixing it by friction, so that it cooperates with the clamping assembly 4 to fix the entire exhaust pipe.

Claims

1. An automobile and motorcycle parts processing equipment, comprising a fixing frame (1), characterized in that: The outer ends of the fixing frame (1) are respectively mounted with a fixing frame 1 (2) and a fixing frame 2 (3); the bottom end of the fixing frame 1 (2) is provided with a mounting assembly (5); the bottom end of the mounting assembly (5) is provided with two fixing assemblies (7); the bottom end of the fixing frame 2 (3) is provided with two clamping assemblies (4); the outer ends of the clamping assemblies (4) and the mounting assembly (5) are both provided with a plurality of limit assemblies (6); The fixing assembly (7) includes a movable sleeve (78) and a shell (73), the outer end of the movable sleeve (78) is rotatably connected to a plurality of driving rods (79), and the ends of the plurality of driving rods (79) away from the movable sleeve (78) are rotatably connected to a fixing rod (710), and the outer end of the shell (73) is provided with a plurality of chute (74) distributed in an annular shape and at equal intervals, the fixing rod (710) passes through the chute (74), and the fixing rod (710) is slidably connected to the chute (74).

2. The automobile and motorcycle parts processing equipment according to claim 1, characterized in that: The limit assembly (6) includes a handle (61) and a threaded rod (64), the inner side wall of the handle (61) is fixedly connected to an inner gear ring (62), one end of the threaded rod (64) is fixedly connected to an outer gear ring (63) matching the inner gear ring (62), the outer gear ring (63) is installed on the inner side of the inner gear ring (62), the outer end of the threaded rod (64) is threadedly connected to a knob (65), and the outer end of the threaded rod (64) is sleeved with two gaskets (66).

3. The automobile and motorcycle parts processing equipment according to claim 1, characterized in that: The clamping assembly (4) includes a connecting rod (41), one end of the connecting rod (41) is rotatably connected to the bottom end of the fixed frame (3) through the limiting assembly (6), the end of the connecting rod (41) away from the fixed frame (3) is rotatably connected to the connecting rod (42) through the limiting assembly (6), and the end of the connecting rod (42) away from the connecting rod (41) is rotatably connected to the clamping hook (43) through the limiting assembly (6), and the outer end of the clamping hook (43) is installed with an abutment device (44).

4. The automobile and motorcycle parts processing equipment according to claim 1, characterized in that: The mounting assembly (5) comprises a mounting plate 1 (51), wherein the mounting plate 1 (51) is fixedly mounted on the bottom end of the fixing frame 1 (2), and a mounting plate 2 (52) is movably mounted on the outer end of the mounting plate 1 (51) via a limiting assembly (6).

5. The automobile and motorcycle parts processing equipment according to claim 4, characterized in that: The outer end of the second mounting plate (52) is movably mounted with two first adjustment plates (53) through the limiting assembly (6), the outer end of the first adjustment plate (53) is movably mounted with a second adjustment plate (54) through the limiting assembly (6), and the outer end of the second adjustment plate (54) is movably mounted with a third mounting plate (55) through the limiting assembly (6).

6. The automobile and motorcycle parts processing equipment according to claim 5, characterized in that: The fixing assembly (7) further comprises a rotating block (71), the rotating block (71) being fixedly mounted on the outer end of the third mounting plate (55), the end of the rotating block (71) away from the third mounting plate (55) being fixedly connected to a fixing ring (72), and the housing (73) being fixedly mounted on the inner side of the fixing ring (72).

7. The automobile and motorcycle parts processing equipment according to claim 6, characterized in that: The fixing assembly (7) further comprises a rotating wheel (75), the outer end of which is rotatably connected to the inner wall of the housing (73) via a snap ring, the outer end of which is fixedly connected to a second threaded rod (76), the other end of which is rotatably connected to the inner wall of the housing (73), the movable sleeve (78) being threadedly connected to the second threaded rod (76), the end of which, away from the driving rod (79), is fixedly connected to an inner expansion block (77), the outer end of which is detachably connected to a rubber block (711).

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