Automatic optical lens feeding device

Abstract

The utility model discloses an automatic optical lens feeding device, which relates to the technical field of optical lens processing and comprises a machine table, a connecting block is arranged on the inner wall of the machine table, the inner wall of the connecting block is rotatably connected with a rotating column through a bearing, a clamping component is arranged at the top end of the connecting block, and a driving component is arranged at the bottom end of the connecting block; the clamping assembly comprises a transverse plate and two auxiliary assemblies, the transverse plate is arranged at one end of the rotating column, and a supporting seat is arranged at the top end of the transverse plate; the clamping device has the advantages that the inserting block is pulled upwards to enable the inserting block, the main clamping bases and the auxiliary clamping bases to be separated from the movable frame, then the inserting block is rotated by 180 degrees, the positions of the main clamping bases and the auxiliary clamping bases are changed, the two main clamping bases clamp a round optical lens blank, the two auxiliary clamping bases can clamp a square optical lens blank, and the clamping device is used for clamping the square optical lens blank. The application range is enlarged, and flexibility is higher.

Description

Technical Field

[0001] The utility model relates to an automatic feeding device, in particular to an automatic feeding device for optical lenses, and belongs to the technical field of optical lens processing. Background Art

[0002] Optical lenses, also known as optical glass lenses, are glass lenses made by mixing high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium, etc. according to a specific formula and melting at high temperature. Optical lens processing includes milling and grinding, so optical lens milling and grinding equipment is used to grind optical lens blanks. Optical lens milling and grinding equipment includes optical lens feeding devices to free workers' hands. There are usually only two shapes of optical lens blanks when there is no cutting edge, namely round and square.

[0003] Among them, the "automatic feeding device for edge grinding of optical lenses" disclosed in the application number "CN202020612431.4" "comprises a base plate, a motor A is installed on the upper surface of the base plate, one end of a rotating shaft A is slidably connected to the upper surface of the motor A, and the other end of the rotating shaft A is fixedly connected to the outer wall of the bottom surface of the motor B. The utility model drives the rotating shaft A to rotate by the operation of the motor A, thereby driving the motor B to rotate, and then cooperates with the telescopic rod to extend and retract, thereby driving the vertical plate to move horizontally, so that the device can be used for feeding optical lenses at various angles and lengths, and then drives the rotating shaft B to rotate by the operation of the motor C, thereby driving the horizontal plate A to rotate, and cooperates with the gear to drive the rotating shaft to rotate, and then the horizontal plate B can be rotated, so that the optical lens in the card slot can be stably placed on the upper surface of the workbench, which is suitable for being widely promoted and used". After further retrieval, it was found that its application number is " The "automatic loading and unloading device for milling and grinding optical lenses" disclosed in "CN202123356972.9" "comprises a machine table, a milling groove is opened in the middle position of the machine table, and a mounting sleeve is fixedly connected to the middle position of one end of the milling groove, the bottom of the mounting sleeve is connected to the rotating shaft through a bearing, and the top of the rotating shaft is fixedly connected to a swing rod, and the top end of the swing rod is fixedly connected to a U-shaped clamping table, and a clamping assembly is provided on one side of the U-shaped clamping table, and an arc groove with the rotating shaft as the center of the circle is opened on one side of the milling groove, and the bottom end of the swing rod is fixedly connected to an arc guide seat inserted in the arc groove. The utility model allows the optical lens to rotate ninety degrees and move it to just below the milling and grinding equipment, which is convenient for the milling and grinding of the optical lens. After the milling and grinding is completed, the forward and reverse motors can be reversed to reset the U-shaped clamping table, so that the milling and grinding equipment of the entire optical lens has the effect of facilitating loading and unloading, and also forms a certain safety protection performance."

[0004] However, the above two methods still have the following defects: the used card slots or two clamping seats can only fix optical lens blanks of a single shape, and cannot meet the fixing requirements of both round and square optical lens blanks. Utility Model Content

[0005] The utility model aims to provide an automatic feeding device for optical lenses, so as to solve the problem that the existing device can only fix optical lens blanks of a single shape, and cannot meet the fixing requirements of both circular and square optical lens blanks.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic feeding device for optical lenses, comprising a machine table, an inner wall of the machine table is provided with a connecting block, the inner wall of the connecting block is rotatably connected to a rotating column through a bearing, a clamping assembly is provided at the top of the connecting block, and a driving assembly is provided at the bottom of the connecting block; the clamping assembly comprises a cross plate and two auxiliary assemblies, the cross plate is arranged at one end of the rotating column, a support seat is provided at the top of the cross plate, and two movable frames are slidably connected to the surface of the support seat; the two auxiliary assemblies each comprise two blocks, two of which are arranged at the top of one of the movable frames, and the other two blocks are arranged at the top of the other movable frame, an insert block is slidably connected between every two corresponding blocks, a main clamping seat is provided on one side of the two insert blocks, and a secondary clamping seat is provided on the other side of the two insert blocks.

[0007] As a preferred technical solution of the utility model, a connecting plate is provided at the bottom of the feed rack, one side of the two main clamping seats is respectively slidably connected to one side of the two mobile racks, one side of the two auxiliary clamping seats is respectively slidably connected to the other side of the two mobile racks, two auxiliary grooves are provided on the surface of the two plug blocks, sliding rods are provided on the inner walls of the four auxiliary grooves, L-shaped plates are slidably connected to the inner walls of the four auxiliary grooves, and anti-slip pads are provided on both sides of the two plug blocks.

[0008] As a preferred technical solution of the utility model, a connecting plate is provided at the bottom of the feed frame, and the surfaces of the four L-shaped plates are provided with sliding holes that slide with the surface of the slide rod, wherein the back sides of two of the L-shaped plates and the front sides of the other two L-shaped plates are provided with return springs, one ends of the four return springs are respectively connected to the inner walls of the four auxiliary grooves, and the four return springs are respectively sleeved on the outside of the four slide rods.

[0009] As a preferred technical solution of the present utility model, a connecting plate is provided at the bottom of the material conveying frame. Card slots for engaging with the L-shaped plates are provided on the back surfaces of two of the stoppers and the front surfaces of the other two stoppers. C-shaped blocks are provided at the tops of the four stoppers. The inner walls of the two C-shaped blocks on one side are both slidably connected to the surface of one of the plug blocks, and the inner walls of the two C-shaped blocks on the other side are both slidably connected to the surface of the other plug block. Trapezoidal bars are provided at the tops of the four C-shaped blocks.

[0010] As a preferred technical solution of the present utility model, a connecting plate is provided at the bottom of the material conveying frame. Cover plates are provided on the surfaces of the four L-shaped plates. The bottom ends of the four cover plates are slidably connected to the tops of the corresponding plug blocks. Anti-slip patterns are provided on the surfaces of the four cover plates.

[0011] As a preferred technical solution of the present utility model, a connecting plate is provided at the bottom of the material conveying frame. A guiding groove for sliding with the surface of the moving frame is provided on the back surface of the support seat. A sliding groove for sliding with the surface of the moving frame is provided on the front surface of the support seat. A bidirectional lead screw is rotatably connected to the inner wall of the sliding groove through a sealed bearing. The contact parts of the bidirectional lead screw with the two moving frames are both threadedly connected through lead screw nuts. One side of the support seat is rotatably connected to a cross bar through a bearing. One end of the cross bar is connected to one end of the bidirectional lead screw, and a turntable is provided at the other end of the cross bar.

[0012] As a preferred technical solution of the present utility model, a connecting plate is provided at the bottom of the material conveying frame. The driving assembly includes a driving seat. The driving seat is arranged at the bottom end of the connecting block. A servo motor is mounted on the driving seat through a motor bracket. The servo motor is a forward and reverse reduction motor. The transmission shaft of the servo motor is connected to the other end of the rotating column. The inner wall of the driving seat is rotatably connected to the surface of the rotating column through a sealed bearing. An annular groove is provided on the inner wall of the driving seat. An anti-detachment ring is slidably connected to the inner wall of the annular groove. The inner wall of the anti-detachment ring is connected to the surface of the rotating column.

[0013] Compared with the related art, an automatic optical lens feeding device provided by the present utility model has the following beneficial effects:

[0014] 1. Pull up the plug block to separate the plug block, the main clamping seat and the auxiliary clamping seat from the moving frame, and then rotate the plug block by 180°, so that the main clamping seat and the auxiliary clamping seat are swapped in position. The two main clamping seats clamp the circular optical lens blanks, and the two auxiliary clamping seats will clamp the square optical lens blanks, increasing the scope of use and being more flexible;

[0015] 2. The U-shaped block laterally limits the adjacent insertion blocks. When the insertion blocks are moved downward, the inner walls on both sides of the U-shaped block will guide the movement of the insertion blocks. The inclined surface of the trapezoidal strip generates a component force on the offset insertion blocks when contacting them, so that the insertion blocks can be inserted between the corresponding two stoppers, improving the installation efficiency of the insertion blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 for the present utility model Figure 1 is an enlarged schematic structural diagram of part A of the present utility model;

[0018] Figure 3 is a schematic side sectional structural diagram of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the support base of the present utility model;

[0020] Figure 5 for the present utility model Figure 4 is an enlarged schematic structural diagram of part B of the present utility model;

[0021] Figure 6 is a schematic side sectional structural diagram of the moving frame of the present utility model.

[0022] In the figure: 1. Machine table; 2. Connecting block; 3. Rotating column; 4. Clamping assembly; 401. Horizontal plate; 402. Support base; 403. Moving frame; 404. Guide groove; 405. Sliding groove; 406. Bidirectional lead screw; 407. Cross bar; 5. Auxiliary assembly; 501. Stopper; 502. Insertion block; 503. Main clamping seat; 504. Sub clamping seat; 505. Auxiliary groove; 506. Slide bar; 507. L-shaped plate; 508. Anti-slip pad; 509. Return spring; 510. Card slot; 511. U-shaped block; 512. Trapezoidal strip; 513. Cover plate; 6. Driving assembly; 601. Driving seat; 602. Servo motor; 603. Annular groove; 604. Anti-slip ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1:

[0025] Please refer to Figure 1-4The utility model provides an automatic feeding device for optical lenses, comprising a machine platform 1, a connecting block 2 is fixedly provided on the inner wall of the machine platform 1, a rotating column 3 is rotatably connected to the inner wall of the connecting block 2 through a bearing, a clamping assembly 4 is provided on the top end of the connecting block 2, and a driving assembly 6 is provided on the bottom end of the connecting block 2;

[0026] The two auxiliary components 5 each include two stoppers 501, wherein the two stoppers 501 are fixedly disposed at the top of one of the moving frames 403, and the other two stoppers 501 are fixedly disposed at the top of the other moving frame 403, and an inserting block 502 is slidably connected between each two corresponding stoppers 501, and a main clamping seat 503 is fixedly disposed on one side of the two inserting blocks 502, and an auxiliary clamping seat 504 is fixedly disposed on the other side of the two inserting blocks 502;

[0027] One side of the two main clamping seats 503 is slidably connected to one side of the two moving frames 403, and one side of the two auxiliary clamping seats 504 is slidably connected to the other side of the two moving frames 403. Two auxiliary grooves 505 are provided on the surfaces of the two plug-in blocks 502. Slide rods 506 are fixedly provided on the inner walls of the four auxiliary grooves 505. L-shaped plates 507 are slidably connected to the inner walls of the four auxiliary grooves 505. Anti-slip pads 508 are fixedly provided on both sides of the two plug-in blocks 502. The two main clamping seats 503 cooperate with each other to clamp round optical lens blanks, and the auxiliary clamping seats 504 cooperate with each other to clamp square optical lens blanks.

[0028] The surfaces of the four L-shaped plates 507 are provided with sliding holes that slide with the surface of the slide bar 506, wherein the backs of two L-shaped plates 507 and the fronts of the other two L-shaped plates 507 are fixedly provided with return springs 509, one end of the four return springs 509 is respectively fixedly connected to the inner walls of the four auxiliary grooves 505, and the four return springs 509 are respectively sleeved on the outside of the four slide bars 506, and the L-shaped plates 507 slide along the surfaces of the slide bars 506 through the sliding holes, and the return springs 509 will stretch and push the L-shaped plates 507 to move, so that the L-shaped plates 507 are inserted into the slots 510;

[0029] The back surfaces of two of the stoppers 501 and the front surfaces of the other two stoppers 501 are both provided with card slots 510 that engage with the L-shaped plates 507. The tops of the four stoppers 501 are all fixedly provided with U-shaped blocks 511. The inner walls of the two U-shaped blocks 511 on one side are both slidably connected to the surface of one of the plug blocks 502, and the inner walls of the two U-shaped blocks 511 on the other side are both slidably connected to the surface of the other plug block 502. The tops of the four U-shaped blocks 511 are all fixedly provided with trapezoidal strips 512. Every two corresponding stoppers 501 longitudinally limit the adjacent plug block 502. The two stoppers 501 fix the plug block 502 through the two card slots 510 and the two L-shaped plates 507. The U-shaped blocks 511 laterally limit the adjacent plug block 502. When the plug block 502 is moved downward, the inner walls on both sides of the U-shaped block 511 guide the movement of the plug block 502. When the inclined surface of the trapezoidal strip 512 fits the plug block 502, it generates a component force on the offset plug block 502, so that the plug block 502 can be inserted between the two corresponding stoppers 501, improving the installation efficiency of the plug block 502;

[0030] The surfaces of the four L-shaped plates 507 are all fixedly provided with cover plates 513. The bottoms of the four cover plates 513 are all slidably connected to the tops of the corresponding plug blocks 502. The surfaces of the four cover plates 513 are all provided with anti-slip patterns. The cover plates 513 can cover the openings at the tops of the auxiliary grooves 505, preventing dust and debris generated in the milling process from accumulating inside the auxiliary grooves 505 through these openings;

[0031] Specifically, place the circular optical lens blank on the top of the support base 402. The clamping assembly 4 drives the two moving frames 403 to move. The two moving frames 403 move in the direction approaching the circular optical lens blank. The two moving frames 403 drive the two plug blocks 502 to move through the four stoppers 501 and the four L-shaped plates 507. The two plug blocks 502 drive the two main clamping seats 503 to move, prompting the two main clamping seats 503 to clamp the circular optical lens blank. When it is necessary to clamp a square optical lens blank, first push the L-shaped plate 507. The L-shaped plate 507 will compress the return spring 509 until the L-shaped plate 507 disengages from the card slot 510, releasing the fixation of the L-shaped plate 507 on the plug block 502. Then pull the plug block 502 upward, causing the plug block 502, the main clamping seat 503, and the auxiliary clamping seat 504 to separate from the moving frame 403. Then rotate the plug block 502 by 180°, and move the plug block 502 downward so that the main clamping seat 503 and the auxiliary clamping seat 504 are swapped. After that, drive the two moving frames 403 to move through the clamping assembly 4, and the two auxiliary clamping seats 504 clamp the square optical lens blank. Therefore, through the setting of the auxiliary assembly 5, it is convenient to swap the main clamping seat 503 for clamping the circular optical lens blank and the auxiliary clamping seat 504 for clamping the square optical lens blank, increasing the scope of use and being more flexible.

[0032] Embodiment 2:

[0033] The clamping assembly 4 includes a horizontal plate 401 and two auxiliary assemblies 5. The horizontal plate 401 is fixedly arranged at one end of the rotating column 3. A support seat 402 is fixedly arranged at the top of the horizontal plate 401. Two moving frames 403 are slidably connected to the surface of the support seat 402.

[0034] The back of the support seat 402 is provided with a guide groove 404 that slides with the surface of the moving frame 403, and the front of the support seat 402 is provided with a slide groove 405 that slides with the surface of the moving frame 403. The inner wall of the slide groove 405 is rotatably connected with a bidirectional screw rod 406 through a sealed bearing, and the contact parts of the bidirectional screw rod 406 and the two moving frames 403 are threadedly connected through a screw nut. One side of the support seat 402 is rotatably connected with a cross bar 407 through a bearing, and one end of the cross bar 407 is fixedly connected to one end of the bidirectional screw rod 406, and a turntable is fixedly provided on the other end of the cross bar 407. The guide groove 404 guides the end of the moving frame 403 away from the bidirectional screw rod 406 to improve the stability of the moving frame 403 when moving. The cross bar 407 is driven to rotate by the turntable, and the cross bar 407 will drive the bidirectional screw rod 406 to rotate. There is no need to put your fingers into the interior of the slide groove 405 to rotate the bidirectional screw rod 406, which is more convenient.

[0035] Specifically, the turntable is rotated, and the turntable drives the cross bar 407 to rotate, and the cross bar 407 drives the bidirectional screw rod 406 to rotate, and the bidirectional screw rod 406 drives the two mobile frames 403 to move. The moving directions of the two mobile frames 403 are opposite, and the two mobile frames 403 drive the two auxiliary components 5 to move, so that the two main clamping seats 503 clamp the circular optical lens blank, and the two mobile frames 403 clamp the square optical lens blank after the main clamping seat 503 and the sub-clamping seat 504 are exchanged.

[0036] Embodiment 3:

[0037] The driving assembly 6 includes a driving seat 601, which is fixedly arranged at the bottom end of the connecting block 2. A servo motor 602 is fixedly arranged at the bottom end of the driving seat 601 through a motor frame. The servo motor 602 is a forward and reverse reduction motor. The transmission shaft of the servo motor 602 is fixedly connected to the other end of the rotating column 3. The inner wall of the driving seat 601 is rotatably connected to the surface of the rotating column 3 through a sealing bearing. An annular groove 603 is formed on the inner wall of the driving seat 601. The inner wall of the annular groove 603 is slidably connected to an anti-slip ring 604. The inner wall of the anti-slip ring 604 is fixedly connected to the surface of the rotating column 3.

[0038] Specifically, start the servo motor 602, which drives the rotating column 3 to rotate 90°, and the rotating column 3 drives the cross plate 401 to rotate 90°. The cross plate 401 drives the support seat 402, the movable frame 403 and the clamped optical lens blank to rotate 90° with the rotating column 3 as the center, so that the optical lens blank moves to the top of the through slot of the machine 1. At this time, the optical lens blank stays directly below the peripheral milling and grinding equipment on the machine 1 for milling and grinding.

[0039] When in use, place the circular optical lens blank on the top of the support seat 402, rotate the turntable, the turntable drives the crossbar 407 to rotate, the crossbar 407 drives the bidirectional screw rod 406 to rotate, the bidirectional screw rod 406 drives the two moving frames 403 to move, the two moving frames 403 move in the direction close to the circular optical lens blank, the two moving frames 403 drive the two plug blocks 502 to move through the four stoppers 501 and the four L-shaped plates 507, the two plug blocks 502 drive the two main clamping seats 503 to move, so that the two main clamping seats 503 clamp the circular optical lens blank;

[0040] When it is necessary to clamp a square optical lens blank, first push the L-shaped plate 507, which will compress the return spring 509 until the L-shaped plate 507 is separated from the card slot 510, thereby releasing the fixation of the L-shaped plate 507 to the plug block 502, and then pull the plug block 502 upward to separate the plug block 502, the main clamping seat 503 and the auxiliary clamping seat 504 from the moving frame 403, and then rotate the plug block 502 180° and move the plug block 502 downward to exchange the positions of the main clamping seat 503 and the auxiliary clamping seat 504;

[0041] Loosen the L-shaped plate 507, the reset spring 509 extends and pushes the L-shaped plate 507, and the L-shaped plate 507 is inserted into the card slot 510 to fix the plug block 502, and then the two moving frames 403 are driven to move through the clamping component 4, and the two auxiliary clamping seats 504 will clamp the square optical lens blank. Therefore, through the auxiliary component 5, it is convenient to replace the positions of the main clamping seat 503 for clamping the round optical lens blank and the auxiliary clamping seat 504 for clamping the square optical lens blank, thereby increasing the scope of use and being more flexible.

[0042] 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 feeding device for optical lenses, comprising a machine platform (1), characterized in that: The inner wall of the machine table (1) is provided with a connecting block (2). The inner wall of the connecting block (2) is rotatably connected with a rotating column (3) through a bearing. The top of the connecting block (2) is provided with a clamping assembly (4), and the bottom of the connecting block (2) is provided with a driving assembly (6). The clamping assembly (4) includes a cross plate (401) and two auxiliary assemblies (5). The cross plate (401) is arranged at one end of the rotating column (3). The top of the cross plate (401) is provided with a support seat (402). The surface of the support seat (402) is slidably connected with two moving frames (403). Both of the two auxiliary assemblies (5) include two stop blocks (501). Two of the stop blocks (501) are arranged at the top of one of the moving frames (403), and the other two stop blocks (501) are arranged at the top of the other moving frame (403). An inserting block (502) is slidably connected between every two corresponding stop blocks (501). A main clamping seat (503) is arranged on one side of each of the two inserting blocks (502), and a sub-clamping seat (504) is arranged on the other side of each of the two inserting blocks (502).

2. The automatic optical lens feeding device according to claim 1, characterized in that: One side of each of the two main clamping seats (503) is slidably connected with one side of each of the two moving frames (403). One side of each of the two sub-clamping seats (504) is slidably connected with the other side of each of the two moving frames (403). Two auxiliary grooves (505) are formed on the surface of each of the two inserting blocks (502). A sliding rod (506) is arranged on the inner wall of each of the four auxiliary grooves (505). An L-shaped plate (507) is slidably connected to the inner wall of each of the four auxiliary grooves (505). Anti-slip pads (508) are arranged on both sides of each of the two inserting blocks (502).

3. The automatic optical lens feeding device according to claim 2, characterized in that: A sliding hole that slidably fits with the surface of the sliding rod (506) is formed on the surface of each of the four L-shaped plates (507). A reset spring (509) is arranged on the back of two of the L-shaped plates (507) and the front of the other two L-shaped plates (507). One end of each of the four reset springs (509) is connected to the inner wall of each of the four auxiliary grooves (505). The four reset springs (509) are respectively sleeved outside the four sliding rods (506).

4. The automatic optical lens feeding device according to claim 2, characterized in that: A clamping groove (510) that engages with the L-shaped plate (507) is formed on the back of two of the stop blocks (501) and the front of the other two stop blocks (501). A U-shaped block (511) is arranged at the top of each of the four stop blocks (501). The inner walls of the two U-shaped blocks (511) on one side are slidably connected to the surface of one of the inserting blocks (502), and the inner walls of the two U-shaped blocks (511) on the other side are slidably connected to the surface of the other inserting block (502). A trapezoidal strip (512) is arranged at the top of each of the four U-shaped blocks (511).

5. The automatic optical lens feeding device according to claim 2, characterized in that: A cover plate (513) is arranged on the surface of each of the four L-shaped plates (507). The bottom end of each of the four cover plates (513) is slidably connected to the top end of the corresponding inserting block (502). Anti-slip patterns are arranged on the surface of each of the four cover plates (513).

6. The automatic optical lens feeding device according to claim 1, characterized in that: The back of the support seat (402) is provided with a guide groove (404) that slides with the surface of the moving frame (403), and the front of the support seat (402) is provided with a slide groove (405) that slides with the surface of the moving frame (403). The inner wall of the slide groove (405) is rotatably connected to a bidirectional screw rod (406) via a sealed bearing, and the contact parts of the bidirectional screw rod (406) and the two moving frames (403) are threadedly connected via a screw nut. One side of the support seat (402) is rotatably connected to a cross bar (407) via a bearing, one end of the cross bar (407) is connected to one end of the bidirectional screw rod (406), and the other end of the cross bar (407) is provided with a turntable.

7. The automatic optical lens feeding device according to claim 1, characterized in that: The driving assembly (6) comprises a driving seat (601), wherein the driving seat (601) is arranged at the bottom end of the connecting block (2), a servo motor (602) is arranged at the bottom end of the driving seat (601) via a motor bracket, the servo motor (602) is a forward and reverse reduction motor, a transmission shaft of the servo motor (602) is connected to the other end of the rotating column (3), an inner wall of the driving seat (601) is rotatably connected to the surface of the rotating column (3) via a sealing bearing, an annular groove (603) is formed on the inner wall of the driving seat (601), an anti-slip ring (604) is slidably connected to the inner wall of the annular groove (603), and the inner wall of the anti-slip ring (604) is connected to the surface of the rotating column (3).

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