Reproductive antibody detection equipment

Abstract

The invention relates to the field of antibody detection facilities, in particular to reproductive antibody detection equipment which comprises a shell, a driving shaft is coaxially and rotatably mounted on the inner bottom surface of the shell and penetrates out of the lower end of the shell, and a large gear is coaxially embedded in the outer surface of the driving shaft; a plurality of transmission shafts are rotationally installed on the inner bottom face of the shell in an annular array mode with the driving shaft as the center, small gears are coaxially embedded in the outer surfaces of the transmission shafts and meshed with the large gear, rotating shells are installed at the ends of the multiple transmission shafts correspondingly, and the upper ends of the rotating shells penetrate out of the upper end of the shell; a rotating shell is arranged in the shell, the rotating shell is rotationally connected with the shell, a pipe clamping piece is installed in the rotating shell, a sealing piece is installed at the upper end of the shell, and a servo motor is fixedly installed at the lower end of the shell. According to the device, the number of samples extracted at a time is increased, the extraction efficiency of the samples is improved, meanwhile, the use convenience is improved, and the safety during sample treatment is also ensured.

Description

Technical Field

[0001] The present invention relates to the field of antibody detection facilities, and in particular to reproductive antibody detection equipment. Background Art

[0002] The purpose of reproductive antibody testing is first to assist clinical diagnosis. In some diseases, it is also an indicator for observing efficacy and prognosis. The detection of reproductive antibodies also has special and important significance in the observation of vaccination effects and epidemiological surveys of infectious diseases.

[0003] During the detection, the rapid dot immunoassay is often used. During the detection process, the antibodies need to be purified and precipitated by centrifugation to extract qualified samples for subsequent detection. However, in actual operation, only samples in one test tube can be extracted at a time, and the quantity of a single extraction is small, which seriously affects the efficiency of sample extraction. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a reproductive antibody detection device.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a reproductive antibody detection device, including a shell, a driving shaft is coaxially rotatably installed on the inner bottom surface of the shell, the driving shaft passes through the lower end of the shell, and a large gear is coaxially inlaid on the outer surface of the driving shaft. A plurality of transmission shafts are rotatably installed in a circular array centered on the driving shaft on the inner bottom surface of the shell, and a small gear is coaxially inlaid on the outer surface of the transmission shaft, and the small gear is meshed with the large gear. A rotating shell is installed at the ends of the plurality of transmission shafts, and the upper end of the rotating shell passes through the upper end of the shell, and the rotating shell is rotatably connected to the shell, a pipe clamp is installed inside the rotating shell, and a sealing member is installed at the upper end of the shell.

[0006] Preferably, a servo motor is fixedly mounted on the lower end of the shell, and the output end of the servo motor is fixed to the lower end of the drive shaft. The seal includes a limiting column fixedly mounted on the middle of the upper end surface of the shell, a connecting sleeve is fitted on the outer surface of the limiting column, a plurality of connecting frames are fixedly mounted in a ring array on the outer surface of the connecting sleeve, and a sealing cover is fixedly mounted on the end of the connecting frame.

[0007] Preferably, an upper limit ring is coaxially inlaid on the outer surface of the limit column, and the lower end of the upper limit ring is fitted to the upper end surface of the connecting sleeve; a lower limit ring is coaxially inlaid on the outer surface of the limit column, and the upper end of the lower limit ring is fitted to the lower end surface of the connecting sleeve; a bearing shell is fixedly installed on the outer surface of the connecting sleeve, and the bearing shell and the connecting frame are staggered; a locking column is coaxially arranged inside the bearing shell, and both ends of the locking column respectively pass through the two ends of the bearing shell, and one end of the locking column passes through the outer surface of the connecting sleeve, and the locking column and the connecting sleeve are slidably matched.

[0008] Preferably, a push cap is coaxially inlaid on the outer surface of the locking column, and the outer surface of the push cap is in contact with the inner wall of the supporting shell. A push spring is wound around the outer side of the locking column, one end of the push spring is fixed to the push cap, and the other end of the push spring is fixed to the inner side of the supporting shell. A pull ring is fixedly installed on the other end of the locking column, and a limiting hole is provided on the outer surface of the limiting column.

[0009] Preferably, the tube clamping member includes a support platform coaxially arranged on the inner bottom surface of the rotating shell, and two tube clamping sleeves are symmetrically arranged inside the rotating shell. The lower end surface of the tube clamping sleeve is in contact with the upper end surface of the support platform, and a plurality of limiting ears are extended in a linear array at the end of one of the tube clamping sleeves.

[0010] Preferably, a pillar is fixedly installed in the middle of the lower end of the support, and the end of the pillar is fixed to the inner bottom surface of the rotating shell. The outer surface of the rotating shell is symmetrically inlaid with two groups of protruding shells, and each group of the protruding shells has a plurality of protruding shells. A pull column is elastically provided inside the protruding shell, and the pull column passes through the end of the protruding shell, and the protruding shell and the pull column are slidably matched, and a ball is fixedly installed on one end of the pull column.

[0011] Preferably, a bearing seat is fixedly installed between the upper and lower end surfaces of the inner part of the extended shell, the pull column passes through the interior of the bearing seat, and the pull column and the bearing seat are slidably matched, the outer surface of the pull column is coaxially inlaid with a positioning ring, the side of the positioning ring is fitted to one side of the bearing seat, and the other end of the pull column is fixedly installed with a fixing sleeve, and a return spring is wound around the outside of the pull column, one end of the return spring is fixed to the other side of the bearing seat, and the other end of the return spring is fixed to the fixing sleeve.

[0012] Preferably, the front and rear end surfaces of the extending shell are both provided with accommodating cavities, wherein a No. 1 tooth plate is fitted and installed inside one of the accommodating cavities, and a No. 2 tooth plate is fitted and installed inside the other accommodating cavity, the fixing sleeve is fixed to the No. 2 tooth plate, and a bearing shaft is rotatably installed between the upper and lower end surfaces of the interior of the extending shell, the bearing shaft is located on the side of the bearing seat, and a connecting gear is coaxially inlaid on the outer surface of the bearing shaft, the No. 2 tooth plate and the No. 1 tooth plate are both meshed with the connecting gear, and guide ridges are extended from the upper and lower end surfaces of the interior of the accommodating cavity, and guide grooves are provided on the upper and lower end surfaces of the No. 1 tooth plate and the No. 2 tooth plate, and the guide ridges are fitted into the interior of the guide grooves, and the end of the No. 1 tooth plate is fixed to the clamping sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up multiple rotating shells, multiple test tubes can be placed in the multiple rotating shells, so that the multiple rotating shells are driven to rotate synchronously through the small gears under the action of the large gear, so as to purify and precipitate the antibodies in the multiple test tubes at the same time, so as to increase the number of single extractions and promote the extraction efficiency of the sample. When the rotating shell is rotating, the ball will move outward under the action of centrifugal force, and then drive the No. 2 tooth plate to move outward. At this time, the connecting gear is driven by the No. 2 tooth plate to rotate, and then drive the No. 1 tooth plate to move inward, so that the two clamping sleeves can move toward each other under the push of the No. 1 tooth plate, and clamp and fix the multiple test tubes by themselves. The process does not require manual fixing by the detection personnel, which effectively improves the convenience of use.

[0014] 2. By rotating the connecting sleeve, the sealing cover can be located directly above the rotating shell. At this time, the locking column is pushed into the limiting hole on the limiting column by the push of the pushing spring to fix the connecting sleeve and the limiting column so that the connecting sleeve cannot be rotated. That is, the sealing cover is limited above the rotating shell to seal the test tube in the rotating shell to avoid safety hazards caused by the test tube flying out during high-speed rotation, thereby ensuring the safety of sample processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a reproductive antibody detection device of the present invention; Figure 2 An internal view of a housing of a reproductive antibody detection device of the present invention; Figure 3 An internal view of a rotating shell of a reproductive antibody detection device of the present invention; Figure 4 An internal view of an extended shell of a reproductive antibody detection device of the present invention; Figure 5 An internal view of a carrying shell of a reproductive antibody detection device of the present invention; Figure 6This is a schematic diagram of a limiting column of a reproductive antibody detection device of the present invention.

[0016] In the figure: 1. shell; 2. limit column; 3. connecting frame; 4. sealing cover; 5. connecting sleeve; 6. bearing shell; 7. rotating shell; 8. upper limit ring; 9. limit hole; 10. driving shaft; 11. servo motor; 12. large gear; 13. transmission shaft; 14. small gear; 15. support platform; 16. clamping sleeve; 17. limit ear; 18. extending shell; 19. sphere; 20. pull column; 21. bearing seat; 22. positioning ring; 23. accommodating chamber; 24. guiding ridge; 25. No. 1 tooth plate; 26. guide groove; 27. bearing shaft; 28. connecting gear; 29. ​​No. 2 tooth plate; 30. fixing sleeve; 31. reset spring; 32. push cap; 33. locking column; 34. push spring; 35. pull ring; 36. lower limit ring; 37. pillar. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] like Figure 1-Figure 6 The reproductive antibody detection device shown in the figure includes a shell 1, a driving shaft 10 is coaxially mounted on the inner bottom surface of the shell 1, the driving shaft 10 passes through the lower end of the shell 1, and a large gear 12 is coaxially inlaid on the outer surface of the driving shaft 10. The driving shaft 10 plays a role in supporting the large gear 12. A plurality of transmission shafts 13 are rotatably mounted in a circular array around the driving shaft 10 as the center on the inner bottom surface of the shell 1. A small gear 14 is coaxially inlaid on the outer surface of the transmission shaft 13. The transmission shaft 13 plays a role in supporting the small gear 14. The small gear 14 and the large gear 12 are meshed with each other, and the small gear 14 and the large gear 12 play the role of driving the multiple rotating shells 7 to rotate. The ends of the multiple transmission shafts 13 are all installed with rotating shells 7, and the upper ends of the rotating shells 7 pass through the upper end of the shell 1. The servo motor 11 drives the large gear 12 to rotate, so as to drive the multiple rotating shells 7 to rotate synchronously through the small gear 14, so as to purify and precipitate the antibodies in multiple test tubes at the same time, and the rotating shell 7 is rotatably connected with the shell 1, and the rotating shell 7 plays the role of loading the test tubes. A tube clamp is installed inside the rotating shell 7, and a sealing member is installed on the upper end of the shell 1.

[0019] A servo motor 11 is fixedly installed at the lower end of the shell 1, and the output end of the servo motor 11 is fixed to the lower end of the drive shaft 10. The servo motor 11 drives the drive shaft 10 to rotate. The sealing component includes a limit column 2 fixedly installed in the middle of the upper end surface of the shell 1. A connecting sleeve 5 is fitted on the outer surface of the limit column 2. The limit column 2 supports the connecting sleeve 5. A plurality of connecting frames 3 are fixedly installed in a ring array on the outer surface of the connecting sleeve 5. A sealing cover 4 is fixedly installed at the end of the connecting frame 3. The connecting frame 3 fixes the sealing cover 4, and the sealing cover 4 seals the rotating shell 7.

[0020] An upper limit ring 8 is coaxially inlaid on the outer surface of the limit column 2, and the lower end of the upper limit ring 8 is fitted to the upper end surface of the connecting sleeve 5. A lower limit ring 36 is coaxially inlaid on the outer surface of the limit column 2. The upper limit ring 8 and the lower limit ring 36 play a role in preventing the connecting sleeve 5 from separating from the limit column 2. The upper end of the lower limit ring 36 is fitted to the lower end surface of the connecting sleeve 5. A bearing shell 6 is fixedly installed on the outer surface of the connecting sleeve 5. The bearing shell 6 is staggered with the connecting frame 3. A locking column 33 is coaxially arranged inside the bearing shell 6. The bearing shell 6 plays a role in supporting the locking column 33. The two ends of the locking column 33 respectively pass through the two ends of the bearing shell 6, and one end of the locking column 33 passes through the outer surface of the connecting sleeve 5, and the locking column 33 slides with the connecting sleeve 5, and the locking column 33 plays a role in fixing the connecting sleeve 5.

[0021] The outer surface of the locking column 33 is coaxially inlaid with a push cap 32, and the outer surface of the push cap 32 is in contact with the inner wall of the bearing shell 6. The push cap 32 is pushed by the push spring 34. The outer side of the locking column 33 is wrapped with a push spring 34. One end of the push spring 34 is fixed to the push cap 32, and the other end of the push spring 34 is fixed to the inner side of the bearing shell 6. A pull ring 35 is fixedly installed on the other end of the locking column 33. The pull ring 35 facilitates pulling the locking column 33. A limiting hole 9 is provided on the outer surface of the limiting column 2, and the limiting hole 9 cooperates with the locking column 33.

[0022] The tube clamping device includes a support platform 15 coaxially arranged on the inner bottom surface of the rotating shell 7, and two tube clamping sleeves 16 are symmetrically arranged inside the rotating shell 7. The support platform 15 plays a role in supporting the test tube, and the lower end surface of the tube clamping sleeve 16 is in contact with the upper end surface of the support platform 15. The tube clamping sleeve 16 plays a role in clamping the test tube. A plurality of limiting ears 17 are extended from the end of one of the tube clamping sleeves 16 in a linear array. The limiting ears 17 play a role in limiting the closing distance of the two tube clamping sleeves 16 to avoid the phenomenon of test tube breakage caused by excessive clamping.

[0023] A support column 37 is fixedly installed in the middle of the lower end of the support platform 15. The support column 37 supports the support platform 15. The end of the support column 37 is fixed to the inner bottom surface of the rotating shell 7. The outer surface of the rotating shell 7 is symmetrically inlaid with two groups of protruding shells 18. The number of protruding shells 18 in each group is multiple. A pull column 20 is elastically arranged inside the protruding shell 18. The pull column 20 passes through the end of the protruding shell 18, and the protruding shell 18 is slidably matched with the pull column 20. The pull column 20 is driven by the ball 19 to move outward, and the ball 19 is fixedly installed on one end of the pull column 20.

[0024] A bearing seat 21 is fixedly installed between the upper and lower end surfaces of the inner part of the extended shell 18, and the pulling column 20 runs through the interior of the bearing seat 21. The bearing seat 21 plays a role in supporting the pulling column 20, and the pulling column 20 and the bearing seat 21 are slidably matched. The outer surface of the pulling column 20 is coaxially inlaid with a positioning ring 22, and the positioning ring 22 plays a role in limiting the reset distance of the pulling column 20. The side of the positioning ring 22 is attached to one side of the bearing seat 21, and a fixing sleeve 30 is fixedly installed on the other end of the pulling column 20. A reset spring 31 is wrapped around the outer side of the pulling column 20, and the fixing sleeve 30 plays a connecting role. One end of the reset spring 31 is fixed to the other side of the bearing seat 21, and the reset spring 31 can push the pulling column 20 so that the outward-moved pulling column 20 can be reset, thereby allowing the two clamping sleeves 16 to move in opposite directions to loosen the clamped test tube, and the other end of the reset spring 31 is fixed to the fixing sleeve 30.

[0025] The front and rear end surfaces of the extended shell 18 are both provided with accommodating cavities 23, wherein a first gear plate 25 is fitted inside one of the accommodating cavities 23, and a second gear plate 29 is fitted inside the other accommodating cavities 23, and the accommodating cavities 23 serve to accommodate the second gear plate 29 and the first gear plate 25, and the fixing sleeve 30 is fixed to the second gear plate 29, and a bearing shaft 27 is rotatably installed between the upper and lower end surfaces inside the extended shell 18, and the bearing shaft 27 serves to carry the connecting gear 28, and the bearing shaft 27 is located on the side of the bearing seat 21, and the outer surface of the bearing shaft 27 is coaxially inlaid with a connecting gear 28, and the second gear plate 29 and the first gear plate 25 are both meshed with the connecting gear 28, and the connecting gear 28 serves to make the second gear plate 29 and the first gear plate 25 move in opposite directions. When the rotating shell 7 is rotating, the ball 19 will move outward under the action of centrifugal force, thereby driving the No. 2 tooth plate 29 to move outward. At this time, the connecting gear 28 is driven by the No. 2 tooth plate 29 to rotate, thereby driving the No. 1 tooth plate 25 to move inward, so that the two clamping sleeves 16 can move toward each other under the push of the No. 1 tooth plate 25 to clamp and fix multiple test tubes by themselves. The upper and lower end surfaces of the interior of the accommodating cavity 23 are extended with guide ridges 24, and the upper and lower end surfaces of the No. 1 tooth plate 25 and the upper and lower end surfaces of the No. 2 tooth plate 29 are provided with guide grooves 26. The guide ridges 24 are fitted into the interior of the guide grooves 26. The guide ridges 24 and the guide grooves 26 play a role in guiding the No. 2 tooth plate 29 and the No. 1 tooth plate 25. The end of the No. 1 tooth plate 25 is fixed to the clamping sleeve 16.

[0026] When in use, multiple test tubes are placed in multiple rotating shells 7. At this time, the test tubes are located between the two clamping sleeves 16 in the rotating shell 7. At the same time, the support platform 15 supports the test tubes, and then the connecting sleeve 5 is rotated so that the sealing cover 4 can be located just above the rotating shell 7. At this time, the locking column 33 is pushed into the limiting hole 9 on the limiting column 2 under the push of the pushing spring 34 to fix the connecting sleeve 5 and the limiting column 2 so that the connecting sleeve 5 cannot be rotated, that is, the sealing cover 4 is limited to the top of the rotating shell 7 to block the test tubes in the rotating shell 7, and then the servo motor 11 works to drive the large gear The wheel 12 rotates, and drives the multiple rotating shells 7 to rotate synchronously through the pinion 14, and purifies and precipitates the antibodies in the multiple test tubes at the same time. When the rotating shell 7 rotates, the ball 19 moves outward under the action of centrifugal force, and then drives the second tooth plate 29 to move outward. At this time, the connecting gear 28 is driven by the second tooth plate 29 to rotate, and then drives the first tooth plate 25 to move inward, so that the two clamping sleeves 16 can move toward each other under the push of the first tooth plate 25, clamp and fix the multiple test tubes by themselves, and ensure that the test tubes can be driven to rotate normally.

[0027] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of this specification, if the terms "one embodiment", "some embodiments", "specific embodiments" and the like appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A reproductive antibody detection device, comprising a housing (1), characterized in that: A drive shaft (10) is coaxially rotatably mounted on the inner bottom surface of the shell (1), the drive shaft (10) passes through the lower end of the shell (1), and a large gear (12) is coaxially inlaid on the outer surface of the drive shaft (10). A plurality of transmission shafts (13) are rotatably mounted in a circular array around the drive shaft (10), and a small gear (14) is coaxially inlaid on the outer surface of the transmission shaft (13). The small gear (14) meshes with the large gear (12). A rotating shell (7) is mounted on the ends of the plurality of transmission shafts (13). The upper end of the rotating shell (7) passes through the upper end of the shell (1), and the rotating shell (7) is rotatably connected to the shell (1). A pipe clamp is mounted inside the rotating shell (7), and a sealing member is mounted on the upper end of the shell (1).

2. A reproductive antibody detection device according to claim 1, characterized in that: A servo motor (11) is fixedly mounted on the lower end of the housing (1), and an output end of the servo motor (11) is fixed to a lower end of a drive shaft (10). The sealing member comprises a limiting column (2) fixedly mounted on the middle of an upper end surface of the housing (1), a connecting sleeve (5) being fitted on an outer surface of the limiting column (2), a plurality of connecting frames (3) being fixedly mounted in an annular array on the outer surface of the connecting sleeve (5), and a sealing cover (4) being fixedly mounted on an end of the connecting frame (3).

3. A reproductive antibody detection device according to claim 2, characterized in that: An upper limit ring (8) is coaxially inlaid on the outer surface of the limit column (2), and the lower end of the upper limit ring (8) is in contact with the upper end surface of the connecting sleeve (5). A lower limit ring (36) is coaxially inlaid on the outer surface of the limit column (2), and the upper end of the lower limit ring (36) is in contact with the lower end surface of the connecting sleeve (5). A bearing shell (6) is fixedly mounted on the outer surface of the connecting sleeve (5), and the bearing shell (6) is staggered with the connecting frame (3). A locking column (33) is coaxially arranged inside the bearing shell (6), and two ends of the locking column (33) respectively extend through the two ends of the bearing shell (6), and one end of the locking column (33) extends through the outer surface of the connecting sleeve (5), and the locking column (33) is slidably matched with the connecting sleeve (5).

4. A reproductive antibody detection device according to claim 3, characterized in that: The outer surface of the locking column (33) is coaxially inlaid with a push cap (32), the outer surface of the push cap (32) is in contact with the inner wall of the bearing shell (6), and a push spring (34) is wound around the outer side of the locking column (33), one end of the push spring (34) is fixed to the push cap (32), and the other end of the push spring (34) is fixed to the inner side of the bearing shell (6), and a pull ring (35) is fixedly installed on the other end of the locking column (33), and a limiting hole (9) is provided on the outer surface of the limiting column (2).

5. A reproductive antibody detection device according to claim 1, characterized in that: The pipe clamping member comprises a support platform (15) coaxially arranged on the inner bottom surface of the rotating shell (7), and two pipe clamping sleeves (16) are symmetrically arranged inside the rotating shell (7), and the lower end surface of the pipe clamping sleeve (16) is in contact with the upper end surface of the support platform (15), and a plurality of limiting ears (17) are extended in a linear array at the end of one of the pipe clamping sleeves (16).

6. A reproductive antibody detection device according to claim 5, characterized in that: A support column (37) is fixedly mounted at the middle of the lower end of the support platform (15), and the end of the support column (37) is fixed to the inner bottom surface of the rotating shell (7). Two groups of protruding shells (18) are symmetrically penetrated and inlaid on the outer surface of the rotating shell (7), and the number of protruding shells (18) in each group is multiple. A pull column (20) is elastically arranged inside the protruding shell (18), and the pull column (20) penetrates from the end of the protruding shell (18), and the protruding shell (18) and the pull column (20) are slidably matched, and a ball (19) is fixedly mounted on one end of the pull column (20).

7. A reproductive antibody detection device according to claim 6, characterized in that: A bearing seat (21) is fixedly mounted between the upper and lower end surfaces of the inner part of the extended shell (18); the pull column (20) passes through the inner part of the bearing seat (21), and the pull column (20) and the bearing seat (21) are slidably matched; a positioning ring (22) is coaxially inlaid on the outer surface of the pull column (20); the side surface of the positioning ring (22) is in contact with one side of the bearing seat (21); a fixing sleeve (30) is fixedly mounted on the other end of the pull column (20); a return spring (31) is wound around the outer side of the pull column (20); one end of the return spring (31) is fixed to the other side of the bearing seat (21), and the other end of the return spring (31) is fixed to the fixing sleeve (30).

8. A reproductive antibody detection device according to claim 7, characterized in that: The front and rear end surfaces of the extension shell (18) are both provided with accommodating cavities (23), wherein a first tooth plate (25) is fitted inside one of the accommodating cavities (23), and a second tooth plate (29) is fitted inside the other accommodating cavity (23), and the fixing sleeve (30) is fixed to the second tooth plate (29). A bearing shaft (27) is rotatably mounted between the upper and lower end surfaces inside the extension shell (18), and the bearing shaft (27) is located on the side of the bearing seat (21). The bearing shaft (27) The outer surface of the second tooth plate (29) and the first tooth plate (25) are coaxially inlaid with a connecting gear (28), the second tooth plate (29) and the first tooth plate (25) are meshed with the connecting gear (28), the upper and lower end surfaces of the interior of the accommodating cavity (23) are extended with guide ridges (24), the upper and lower end surfaces of the first tooth plate (25) and the upper and lower end surfaces of the second tooth plate (29) are provided with guide grooves (26), the guide ridges (24) are fitted into the interior of the guide grooves (26), and the end of the first tooth plate (25) is fixed to the clamping sleeve (16).

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