Grinding tool for expanding tire core of numerical control horizontal grinder

Abstract

The application discloses a kind of numerical control horizontal grinder expansion tire core's grinding frock, the present application relates to mechanical processing technical field, including: connecting disc;Connecting device, the outer wall of connecting device is fixedly connected with the outer wall of connecting disc, mounting device, the outer wall of mounting device is in contact with the outer wall of connecting device, the inner wall of mounting device is slidably connected with core body;The mounting device includes installation assembly, the inner wall of installation assembly is slidably connected with the outer wall of core body, the inner wall of the outer wall of installation assembly is slidably connected with quick connection assembly, the device plays an important role in the fixation of installation assembly by setting quick connection assembly.Dismounting installation assembly, just need to grasp pull ring and pull, vice plate and main plate can be in closed or expanded state, realize quick installation or dismounting installation assembly, when needing to replace different specifications expansion tire core, installation assembly can be quickly replaced, improve the flexibility and efficiency of production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a grinding tool for the expansion core of a numerical control horizontal grinding machine. BACKGROUND

[0002] In the process of grinding the expansion core on the numerical control horizontal grinding machine, the traditional grinding tool has many problems.

[0003] The installation assembly of the traditional tool can only adapt to the expansion core of a specific size, and has poor universality. For the processing needs of expansion cores of different specifications, multiple different tools need to be equipped, which not only increases the production cost, but also occupies a large amount of storage space and management cost. For example, in some small processing enterprises, due to limited funds, multiple tools cannot be purchased to meet the processing needs of expansion cores of different specifications, which limits the development of the enterprise. SUMMARY

[0004] In view of the defects of the prior art, the technical scheme adopted by the present application to solve the technical problems is: a grinding tool for the expansion core of a numerical control horizontal grinding machine, comprising: a connecting disc; a connecting device, the outer wall of the connecting device is fixedly connected with the outer wall of the connecting disc, and the connecting device is used to limit the position of the expansion core; an installation device, the outer wall of the installation device is in contact with the outer wall of the connecting device, the installation device is used to install the expansion core, and the inner wall of the installation device is slidably connected with a core body; the installation device comprises an installation assembly, the inner wall of the installation assembly is slidably connected with the outer wall of the core body, the installation assembly is used to install the core body, the inner wall of the outer wall of the installation assembly is slidably connected with a quick connection assembly, and the quick connection assembly is used to connect the core body and the connecting device; the quick connection assembly comprises a sliding cylinder, the outer wall of the sliding cylinder is threadedly connected with a threaded block, the outer wall of the threaded block is slidably connected with a swivel ring, the inner wall of the sliding cylinder is slidably connected with a pull ring through a connecting plate, the outer wall of the connecting plate is fixedly connected with the outer wall of the pull ring, the side of the connecting plate away from the pull ring is fixedly connected with a sliding sleeve, the outer wall of the sliding sleeve is rotatably connected with a secondary plate, the side of the secondary plate away from the sliding sleeve is rotatably connected with a primary plate, and the primary plate and the secondary plate are connected through a rotating shaft.

[0005] Preferably, the side of the primary plate away from the secondary plate is rotatably connected with the inner wall of the sliding cylinder through a fixed seat, the outer wall of the fixed seat is fixedly connected with the inner wall of the sliding cylinder, the inner wall of the sliding cylinder is fixedly connected with a stop block, the stop block is annularly arranged along the central axis of the sliding cylinder, the inner wall of the sliding cylinder is fixedly connected with a positioning column, and the outer wall of the connecting plate is slidably connected with the inner wall of the sliding cylinder.

[0006] Preferably, the outer wall of the positioning column is in sliding connection with the inner wall of the sliding sleeve, the outer wall of the sliding sleeve is fixedly connected with a tension spring, the side of the tension spring away from the sliding sleeve is fixedly connected with the inner wall of the sliding cylinder, the outer wall of the auxiliary plate is fixedly connected with an anti-skid block, the anti-skid block is made of elastic material, and the anti-skid block is linearly arrayed along the outer wall of the auxiliary plate, and the outer wall of the main plate is in contact with the outer wall of the stop block.

[0007] Preferably, the mounting assembly comprises a connecting flange, the connecting flange is annularly arrayed along the central axis of the connecting disc, the inner wall of the connecting flange is in sliding connection with the outer wall of the core body through a mounting groove, the mounting groove is arranged in the wall of the connecting flange, a bolt groove is arranged in the wall of the connecting flange, a bolt is arranged in the bolt groove, the bolt grooves are annularly arrayed along the central axis of the connecting flange, the inner wall of the connecting flange is in sliding connection with the outer wall of the sliding cylinder, and the outer wall of the connecting flange is in contact with the outer wall of the rotating ring.

[0008] Preferably, the connecting device comprises a supporting assembly, the outer wall of the supporting assembly is fixedly connected with the outer wall of the connecting disc, the supporting assembly is used for supporting the position of the mounting assembly, the outer wall of the supporting assembly is in sliding connection with a limiting assembly, the limiting assembly is used for limiting the position of the supporting assembly, the supporting assembly comprises a supporting column, the supporting column is annularly arrayed along the central axis of the connecting disc, the outer wall of the supporting column is fixedly connected with a connecting ring, the outer wall of the supporting column is fixedly connected with a supporting rib, the supporting rib is used for fixing the supporting column, and the outer wall of the supporting column is fixedly connected with a semicircular plate.

[0009] Preferably, the outer wall of the semicircular plate is fixedly connected with the outer wall of the supporting rib, the inner wall of the semicircular plate is in sliding connection with the outer wall of the sliding cylinder, the outer wall of the semicircular plate is in contact with the outer wall of the anti-skid block, a through groove is arranged in the wall of the semicircular plate and corresponds to the outer wall of the sliding cylinder, and the outer wall of the semicircular plate is in contact with the outer wall of the connecting flange.

[0010] Preferably, the limiting assembly comprises a rotating disc, a fixed column is rotatably connected to the inner wall of the rotating disc, a sliding ring is in sliding connection with the outer wall of the rotating disc through a limiting column, the outer wall of the limiting column is fixedly connected with the outer wall of the sliding ring, a clamping block is fixedly connected to the outer wall of the rotating disc, the clamping block is made of elastic material, and the clamping block is annularly arrayed along the central axis of the rotating disc, the outer wall of the fixed column is fixedly connected with the outer wall of the connecting disc, a threaded groove is arranged in the wall of the connecting disc and annularly arrayed along the central axis of the connecting disc, the outer wall of the limiting column is in sliding connection with the outer wall of the connecting disc, the outer wall of the clamping block is clamped with the outer wall of the sliding ring, the outer wall of the rotating disc is fixedly connected with the outer wall of the supporting column, and the outer wall of the rotating disc is fixedly connected with the outer wall of the supporting rib.

[0011] The beneficial effects of the present application are as follows:

[0012] 1. The present application plays an important role in the fixation of the installation assembly by setting the quick connection assembly. When disassembling and installing the installation assembly, only need to grab the pull ring and pull, so that the secondary plate and the main plate are in the closed or expanded state, realizing the quick installation or disassembly of the installation assembly, when it is necessary to replace the tire core of different specifications, the installation assembly can be quickly replaced, improving the flexibility and efficiency of production.

[0013] 2. The present application can adjust the position of the sliding ring by setting the limiting assembly, so as to realize the accurate adjustment and locking of the position of the supporting assembly, ensure that the supporting assembly is in the best working position, and ensure the stability of the whole connecting device in the working process, which helps to improve the accuracy and consistency of grinding processing, so that each tire core can be processed under the same conditions.

[0014] 3. The present application sets the installation assembly, the connecting flange in the installation assembly is connected with the outer wall of the core body through the installation slot, which can adapt to different sizes of tire core, the bolt slot can be used for installing the bolt, further fixing the core body, and ensuring that the core body will not displace in the grinding process. The tooling has strong adaptability to the processing needs of tire cores of different specifications, reduces the demand for different toolings, and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the front view of the present application;

[0016] Figure 2 is the sectional view of the present application;

[0017] Figure 3 is the structural schematic view of the supporting assembly of the present application;

[0018] Figure 4 is the structural schematic view of the limiting assembly of the present application;

[0019] Figure 5 is the structural schematic view of the quick connection assembly of the present application;

[0020] Figure 6 is the structural schematic view of the present application at A;

[0021] Figure 7 is the structural schematic view of the installation assembly of the present application.

[0022] In the figure: 1, connecting disc; 2, connecting device; 3, mounting device; 4, limiting assembly; 5, supporting assembly; 6, mounting assembly; 7, quick connecting assembly; 8, core; 51, semicircular plate; 52, supporting column; 53, supporting rib; 54, connecting ring; 41, rotating disc; 42, clamping block; 43, threaded groove; 44, fixed column; 45, sliding ring; 46, limiting column; 71, sliding cylinder; 72, threaded block; 73, rotating ring; 74, pull ring; 75, connecting plate; 76, pull spring; 77, positioning column; 78, sliding sleeve; 79, main plate; 710, stop block; 711, auxiliary plate; 712, anti-skid block; 61, connecting flange; 62, mounting groove; 63, bolt groove. DETAILED DESCRIPTION

[0023] The application will be further described below in conjunction with the drawings and specific embodiments. The embodiments of the application are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to best utilize the application in various embodiments with various modifications as are suited to the particular use contemplated. EMBODIMENTS

[0024] As Figure 1 - Figure 7As shown, the present application provides a technical scheme: a numerical control horizontal grinding machine tire core expansion grinding tool, comprising: a connecting disc 1; connecting device 2, the outer wall of connecting device 2 is fixedly connected with the outer wall of connecting disc 1, connecting device 2 is used for limiting the position of tire core expansion; mounting device 3, the outer wall of mounting device 3 is in contact with the outer wall of connecting device 2, mounting device 3 is used for mounting tire core expansion, the inner wall of mounting device 3 is slidably connected with core 8; mounting device 3 includes mounting assembly 6, the inner wall of mounting assembly 6 is slidably connected with the outer wall of core 8, mounting assembly 6 is used for mounting core 8, the inner wall of the outer wall of mounting assembly 6 is slidably connected with quick connecting assembly 7, quick connecting assembly 7 is used for connecting core 8 and connecting device 2; quick connecting assembly 7 includes slide cylinder 71, the outer wall of slide cylinder 71 is threadedly connected with threaded block 72, the outer wall of threaded block 72 is slidably connected with swivel ring 73, the inner wall of slide cylinder 71 is slidably connected with pull ring 74 through connecting plate 75, and the outer wall of connecting plate 75 is fixedly connected with the outer wall of pull ring 74, one side of connecting plate 75 away from pull ring 74 is fixedly connected with slide sleeve 78, the outer wall of slide sleeve 78 is rotatably connected with vice plate 711, one side of vice plate 711 away from slide sleeve 78 is rotatably connected with main plate 79, one side of main plate 79 away from vice plate 711 is rotatably connected with the inner wall of slide cylinder 71 through fixing seat, the inner wall of slide cylinder 71 is fixedly connected with stop block 710, and stop block 710 is annularly arrayed along the central axis of slide cylinder 71, the inner wall of slide cylinder 71 stop block 710 limits the position of main plate 79, preventing excessive movement, the inner wall of slide cylinder 71 is fixedly connected with positioning column 77, and the outer wall of connecting plate 75 is slidably connected with the inner wall of slide cylinder 71.

[0025] The outer wall of positioning column 77 is slidably connected with the inner wall of slide sleeve 78, the outer wall of slide sleeve 78 is fixedly connected with tension spring 76, one side of tension spring 76 away from slide sleeve 78 is fixedly connected with the inner wall of slide cylinder 71, the outer wall of vice plate 711 is fixedly connected with anti-skid block 712, and anti-skid block 712 is linearly arrayed along the outer wall of vice plate 711, anti-skid block 712 on vice plate 711 is attached to semicircular plate 51, increasing friction, improving connection stability, the outer wall of main plate 79 is in contact with the outer wall of stop block 710, mounting assembly 6 includes connecting flange 61, connecting flange 61 is annularly arrayed along the central axis of connecting disc 1, the inner wall of connecting flange 61 is slidably connected with the outer wall of core 8 through mounting groove 62, and mounting groove 62 is formed in the wall of connecting flange 61, screw groove 63 is formed in the wall of connecting flange 61, and screw groove 63 is annularly arrayed along the central axis of connecting flange 61, the inner wall of connecting flange 61 is slidably connected with the outer wall of slide cylinder 71, and the outer wall of connecting flange 61 is in contact with the outer wall of swivel ring 73.

[0026] The connecting device 2 comprises a support assembly 5, the outer wall of the support assembly 5 is fixedly connected with the outer wall of the connecting disc 1, the support assembly 5 is used for supporting the position of the mounting assembly 6, the outer wall of the support assembly 5 is slidingly connected with the limiting assembly 4, the limiting assembly 4 is used for limiting the position of the support assembly 5, the support assembly 5 comprises support columns 52, the support columns 52 are arranged in an annular array along the central axis of the connecting disc 1, the outer wall of the support column 52 is fixedly connected with a connecting ring 54, the outer wall of the support column 52 is fixedly connected with a support rib 53, the outer wall of the support column 52 is fixedly connected with a semicircular plate 51, the outer wall of the semicircular plate 51 is fixedly connected with the outer wall of the support rib 53, the connecting ring 54 and the support rib 53 further enhance the structural stability, the inner wall of the semicircular plate 51 is slidingly connected with the outer wall of the sliding cylinder 71, the outer wall of the semicircular plate 51 is in contact with the outer wall of the anti-skid block 712, and the outer wall of the semicircular plate 51 is in contact with the outer wall of the connecting flange 61.

[0027] The limiting assembly 4 comprises a rotating disc 41, the inner wall of the rotating disc 41 is rotationally connected with a fixed column 44, the outer wall of the rotating disc 41 is slidingly connected with a sliding ring 45 through a limiting column 46, the outer wall of the limiting column 46 is fixedly connected with the outer wall of the sliding ring 45, the outer wall of the rotating disc 41 is fixedly connected with a clamping block 42, the clamping block 42 is arranged in an annular array along the central axis of the rotating disc 41, the outer wall of the fixed column 44 is fixedly connected with the outer wall of the connecting disc 1, a threaded groove 43 is formed in the wall of the connecting disc 1, and the threaded groove 43 is arranged in an annular array along the central axis of the connecting disc 1, the outer wall of the limiting column 46 is slidingly connected with the outer wall of the connecting disc 1, the outer wall of the clamping block 42 is clamped with the outer wall of the sliding ring 45, the outer wall of the rotating disc 41 is fixedly connected with the outer wall of the support column 52, and the outer wall of the rotating disc 41 is fixedly connected with the outer wall of the support rib 53, through the sliding connection of the limiting column 46 and the sliding ring 45, the position of the sliding ring 45 can be adjusted, and it is ensured that the support assembly 5 is in the working position.

[0028] Working principle:

[0029] The grinding tool mainly comprises a connecting disc 1, a connecting device 2 and a mounting device 3, the connecting disc 1 serves as a basic structure and provides installation and support for other components.

[0030] The connecting disc 1 serves as a basic support structure of the whole tool and provides a stable mounting platform for other components, before using the tool, a bolt is passed through the numerical control horizontal grinding machine and screwed into the threaded groove 43 on the connecting disc 1, so that the connecting disc 1 is fixed on the numerical control horizontal grinding machine, the connecting device 2 plays a key role in limiting the position of the tire core in the whole tool, and the connecting device 2 is divided into a support assembly 5 and a limiting assembly 4.

[0031] In the support assembly 5, a plurality of support columns 52 are arranged in an annular array along the central axis of the connecting disc 1 to provide the main support force for the entire structure, and the connecting ring 54 and the support rib 53 further enhance the structural stability. The semicircular plate 51 is fixedly connected with the support rib 53 and the support column 52, and the inner wall thereof is slidably connected with the outer wall of the sliding cylinder 71 of the quick connection assembly 7 in the mounting device 3. In operation, the support assembly 5 provides stable support for the mounting device 3, bears various forces generated during the grinding process, and ensures the stability of the overall structure of the tooling and prevents deformation or shaking.

[0032] The limiting assembly 4 mainly comprises a rotating disc 41, a fixed column 44, a clamping block 42, a limiting column 46 and a sliding ring 45. The rotating disc 41 is connected with the connecting disc 1 through the fixed column 44 to ensure the stable position of the rotating disc 41. The clamping block 42 on the outer wall of the rotating disc 41 is clamped with the sliding ring 45. The position of the sliding ring 45 can be adjusted through the sliding connection of the limiting column 46 and the sliding ring 45, so as to ensure that the support assembly 5 is in the working position and the stability of the entire connecting device 2 during the working process. In actual operation, after the tooling is installed on the numerical control horizontal grinding machine, the position of the sliding ring 45 can be adjusted according to the specific machining requirements. When adjusting the position of the support assembly 5, the sliding ring 45 is slid in the direction away from the rotating disc 41, so that the limiting column 46 on the sliding ring 45 slides out of the groove on the rotating disc 41, thereby releasing the locking of the rotating disc 41. Then, the position of the support assembly 5 is adjusted. After the adjustment of the position of the support assembly 5 is completed, the sliding ring 45 is slid in the opposite direction, so that the limiting column 46 slides into the groove of the rotating disc 41 again, thereby relocking the position of the rotating disc 41.

[0033] The mounting device 3 is directly in contact with the tire expander core and is installed and fixed. The mounting device 3 comprises a mounting assembly 6 and a quick connection assembly 7. The connecting flange 61 in the mounting assembly 6 is slidably connected with the outer wall of the core 8 through the mounting groove 62. In the process of installing the tire expander core, the core 8 is inserted into the mounting groove 62 to achieve preliminary positioning. The bolt groove 63 can be used for installing bolts to further fix the core 8 and ensure that the core 8 does not displace during the grinding process.

[0034] The quick-connection assembly 7 plays an important role in the fixing of the installation assembly 6. The outer wall of the sliding cylinder 71 is screwed with the threaded block 72, and the outer wall of the threaded block 72 is slidingly connected with the rotating ring 73. When the installation assembly 6 is disassembled and assembled, the pull ring 74 is pulled to drive the connecting plate 75 and the sliding sleeve 78 to move, so that the auxiliary plate 711 and the main plate 79 are in a closed state, i.e., turned to the inside of the sliding cylinder 71, and the installation assembly 6 can be disassembled. When the installation assembly 6 is installed on the semicircular plate 51, the sliding cylinder 71 is inserted through the connecting flange 61 and the semicircular plate 51, the pull ring 74 is released, the tension spring 76 releases the elastic potential energy, the sliding sleeve 78 slides away from the connecting plate 75, the auxiliary plate 711 and the main plate 79 are in an expanded state, i.e., turned out of the sliding cylinder 71 and folded, the stop block 710 on the inner wall of the sliding cylinder 71 limits the position of the main plate 79 to prevent excessive movement. At this time, the anti-skid block 712 on the auxiliary plate 711 is attached to the semicircular plate 51 to increase the friction and improve the connection stability. Then, the threaded block 72 is rotated to drive the rotating ring 73 to attach to the connecting flange 61, and the semicircular plate 51 and the connecting flange 61 are extruded by the auxiliary plate 711 and the rotating ring 73 to fix the connecting flange 61 on the semicircular plate 51.

[0035] Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. A grinding tool for expanding a core of a tire of a numerical control horizontal grinder, characterized by, Include: Connecting disc (1); Connecting device (2), the outer wall of the connecting device (2) is fixedly connected with the outer wall of the connecting disc (1), and the connecting device (2) is used to limit the position of the tire expander core; The mounting device (3) is in contact with the outer wall of the connecting device (2), and the mounting device (3) is used to install the tire expander core, and the inner wall of the mounting device (3) is slidably connected with the core (8); The mounting device (3) includes a mounting assembly (6), the inner wall of the mounting assembly (6) is slidably connected with the outer wall of the core (8), the mounting assembly (6) is used to install the core (8), the outer wall of the mounting assembly (6) is slidably connected with the quick connecting assembly (7), and the quick connecting assembly (7) is used to connect the core (8) and the connecting device (2); The quick connecting assembly (7) includes a sliding cylinder (71), the outer wall of the sliding cylinder (71) is threadedly connected with a threaded block (72), the outer wall of the threaded block (72) is slidably connected with a swivel ring (73), the inner wall of the sliding cylinder (71) is slidably connected with a pull ring (74) through a connecting plate (75), the outer wall of the connecting plate (75) is fixedly connected with the pull ring (74), one side of the connecting plate (75) away from the pull ring (74) is fixedly connected with a sliding sleeve (78), the outer wall of the sliding sleeve (78) is rotatably connected with a secondary plate (711), one side of the secondary plate (711) away from the sliding sleeve (78) is rotatably connected with a primary plate (79); The primary plate (79) is rotatably connected with the inner wall of the sliding cylinder (71) through a fixing seat away from the secondary plate (711), the inner wall of the sliding cylinder (71) is fixedly connected with a stop block (710), and the stop block (710) is annularly arranged along the central axis of the sliding cylinder (71), the inner wall of the sliding cylinder (71) is fixedly connected with a positioning column (77), and the outer wall of the connecting plate (75) is slidably connected with the inner wall of the sliding cylinder (71); The outer wall of the positioning column (77) is slidably connected with the inner wall of the sliding sleeve (78), the outer wall of the sliding sleeve (78) is fixedly connected with a tension spring (76), one side of the tension spring (76) away from the sliding sleeve (78) is fixedly connected with the inner wall of the sliding cylinder (71), the outer wall of the secondary plate (711) is fixedly connected with an anti-skid block (712), and the anti-skid block (712) is linearly arranged along the outer wall of the secondary plate (711), and the outer wall of the primary plate (79) is in contact with the outer wall of the stop block (710).

2. The grinding tool for expanding the tire core of the numerical control horizontal grinding machine according to claim 1, characterized in that: The mounting assembly (6) includes a connecting flange (61), the connecting flange (61) is annularly arranged along the central axis of the connecting disc (1), the inner wall of the connecting flange (61) is slidably connected with the outer wall of the core (8) through a mounting groove (62), and the mounting groove (62) is formed in the wall of the connecting flange (61), a bolt groove (63) is formed in the wall of the connecting flange (61), and the bolt groove (63) is annularly arranged along the central axis of the connecting flange (61), the inner wall of the connecting flange (61) is slidably connected with the outer wall of the sliding cylinder (71), and the outer wall of the connecting flange (61) is in contact with the outer wall of the swivel ring (73).

3. The grinding tool of claim 1, wherein: The connecting device (2) comprises a support assembly (5), the outer wall of the support assembly (5) is fixedly connected with the outer wall of the connecting disc (1), the support assembly (5) is used for supporting the position of the mounting assembly (6), the outer wall of the support assembly (5) is slidingly connected with the limiting assembly (4), and the limiting assembly (4) is used for limiting the position of the support assembly (5).

4. The grinding tool of claim 3, wherein: The support assembly (5) comprises support columns (52) arranged in an annular array along the central axis of the connecting disc (1), the outer wall of the support column (52) is fixedly connected with a connecting ring (54), the outer wall of the support column (52) is fixedly connected with a support rib (53), and the outer wall of the support column (52) is fixedly connected with a semicircular plate (51).

5. The grinding tool of claim 4, wherein: The outer wall of the semicircular plate (51) is fixedly connected with the outer wall of the support rib (53), the inner wall of the semicircular plate (51) is slidingly connected with the outer wall of a sliding cylinder (71), the outer wall of the semicircular plate (51) is in contact with the outer wall of an anti-skid block (712), and the outer wall of the semicircular plate (51) is in contact with the outer wall of a connecting flange (61).

6. The grinding tool of claim 3, wherein: The limiting assembly (4) comprises a rotating disc (41), the inner wall of the rotating disc (41) is rotatably connected with a fixed column (44), the outer wall of the rotating disc (41) is slidingly connected with a sliding ring (45) through a limiting column (46), and the outer wall of the limiting column (46) is fixedly connected with the outer wall of the sliding ring (45).

7. The grinding tool of claim 6, wherein: The outer wall of the rotating disc (41) is fixedly connected with a clamping block (42), the clamping block (42) is arranged in an annular array along the central axis of the rotating disc (41), the outer wall of the fixed column (44) is fixedly connected with the outer wall of the connecting disc (1), a threaded groove (43) is formed in the wall of the connecting disc (1) and arranged in an annular array along the central axis of the connecting disc (1), the outer wall of the limiting column (46) is slidingly connected with the outer wall of the connecting disc (1), the outer wall of the clamping block (42) is clamped with the outer wall of the sliding ring (45), the outer wall of the rotating disc (41) is fixedly connected with the outer wall of the support column (52), and the outer wall of the rotating disc (41) is fixedly connected with the outer wall of the support rib (53).

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