Lamp tube sealing and polishing device for lamp production

Abstract

The utility model relates to the technical field of lamp production, and discloses a lamp tube sealing and polishing device for lamp production, which comprises a lamp shell, needles and a base, the needles are fixed at two ends of the lamp shell, a limiting mechanism is arranged on the base, and the outside of the lamp shell is limited on the base through the limiting mechanism. The rotating mechanism comprises a motor, a first gear, a second gear, an outer sleeve, an inner sleeve, a connecting plate, an arc plate, a grinding block and a sliding unit, a driving rod is arranged in the middle of the first gear, and the output end of the motor is connected with the driving rod in the middle of the first gear; according to the polishing device, the sealing position of the lamp shell can be polished under the action of the rotating mechanism, and when polishing work on the sealing position at one end of the lamp shell is stopped in cooperation with the deformation mechanism, the lamp shell can be driven to rotate by 180 degrees. And then the direction of the lamp shell is adjusted, so that the unpolished sealing position is located on the rotating mechanism to be polished. The structure is simple, meanwhile, the manufacturing cost is low, and the labor cost is reduced through automatic setting.

Description

Technical Field

[0001] The utility model relates to the field of lamp production, in particular to a lamp tube sealing and polishing device for lamp production. Background Art

[0002] Lamp tube seal polishing is a common process step, which is used to deal with the burrs on the edge of the lamp tube seal to make it smoother.

[0003] However, the prior art has the following defects:

[0004] When using a relatively low-cost grinder to grind the sealing part of the lamp tube, one end of the lamp tube is first grinded and then the lamp tube needs to be rotated so that the un-grinded end is on the grinder and then grinded, which is time-consuming and causes relatively high labor costs. Utility Model Content

[0005] In order to solve the technical problem that grinding the sealing part of the lamp tube is time-consuming and requires high labor costs, the utility model provides a lamp tube sealing grinding device for lamp production.

[0006] The utility model adopts the following technical scheme to achieve: a lamp tube sealing and polishing device for lamp production.

[0007] It includes a lamp housing, a needle and a base, wherein the two ends of the lamp housing are fixed with needles, the base is provided with a limiting mechanism, and the outside of the lamp housing is limited on the base by the limiting mechanism;

[0008] A rotating mechanism, the rotating mechanism comprising a motor, a gear 1, a gear 2, an outer sleeve, an inner sleeve, a connecting plate, an arc plate, a grinding block and a sliding unit, a driving rod is provided in the middle of the gear 1, an output end of the motor is connected to the driving rod in the middle of the gear 1, the gear 1 and the gear 2 form a meshing connection, the gear 2 is fixed to the outside of the outer sleeve, one end of the arc plate is arranged outside the outer sleeve, and the grinding block is arranged at one end of the arc plate close to the outer sleeve, one end of the inner sleeve is fixed to a base in the outer sleeve, and the connecting plate is fixed to the other end of the inner sleeve;

[0009] A deformation mechanism, the deformation mechanism includes a shell, a motion groove 1, a spring 1, a long rod, a delay block 1, a delay block 2, a motion groove 2, a support plate and a deformation unit, the shell is fixed on the base, and the motion groove 1 is opened in the shell, the support plate is fixed on the base of the shell away from the gear 2 side, and the motion groove 2 is opened in the support plate, the motion groove 1, the motion groove 2 and the outside of the shell are connected to form a channel 1 for the long rod to move, the long rod is connected to the spring 1 through the deformation unit to drive the long rod to move in the channel 1, multiple delay blocks 2 are fixed on the long rod at equal distances, and multiple delay blocks 1 are fixed in the motion groove 1 at equal distances, and the delay block 1 is in contact with the outside of the delay block 2.

[0010] Through the above technical solution, the lamp housing can be relatively stably limited under the action of the limiting mechanism, so that the deformation mechanism can drive the lamp housing to rotate 180 degrees.

[0011] The outer shell and the arc plate are connected by an electric push rod, which can drive the arc plate to move closer to or away from the outer shell. When the size of the burr at the sealing edge of the lamp shell cannot be controlled, the arc plate can be located outside the burr to cover the burr, thereby enhancing the practicality of the device.

[0012] The lamp housing can be efficiently rotated under the action of the deformation mechanism, so that the sealing part at the other end of the lamp housing can be polished, thereby improving the polishing efficiency when the device is used.

[0013] As a further improvement of the above scheme, the limiting mechanism includes bevel gear 2, a connecting rod, a fixed plate, a mounting groove and an anti-slip rubber pad. A rotating groove is provided at one end of the moving groove for the connecting rod to rotate, and bevel gear 2 is fixed to one end of the connecting rod. The other end of the connecting rod is fixed through the rotating groove and the fixed plate, and the mounting groove is provided on the fixed plate. The anti-slip rubber pad is arranged in the mounting groove to increase the friction between the lamp housing and the mounting groove.

[0014] Through the above technical solution, by placing the lamp housing in the placement groove and fitting the anti-skid rubber pad, the friction between the lamp housing and the placement groove is increased, thereby ensuring that the lamp housing will not fall off when the lamp housing is driven by the fixing plate to rotate.

[0015] As a further improvement of the above scheme, the sliding unit includes an arc block, an arc groove, a spherical block, a hemispherical groove and a needle groove, one end of the two arc blocks are fixed at one end of the outer sleeve, and the arc groove is opened on the base, the other end of the arc block slides in the arc groove, the hemispherical groove is opened at the other end of the outer sleeve, one end of the spherical block is fixed at one end of the connecting plate, and the other end of the spherical block is in contact with the hemispherical groove, and the two needle grooves are opened at the other end of the connecting plate.

[0016] According to the above technical solution, when the outer shell is rotated by the second gear, the arc block slides in the arc groove, and the hemispherical groove slides in contact with the spherical block. The stability of the outer shell during rotation is ensured, so that the long rod will not move out of the first motion groove when the second gear rotates. The needle groove can ensure that the position of the lamp shell can be more stable when the lamp shell is polished by the polishing block.

[0017] As a further improvement of the above scheme, the deformation unit includes a slide bar groove, a slide bar, a sliding sleeve block, an engagement unit and an anti-reversal unit. The two slide bar grooves are both opened in the motion groove one, and the two ends of the two slide bars are fixed in the slide bar groove. The sliding sleeve block slides on the slide bar groove, and one end of spring one is welded in the slide bar groove, the other end of spring one is welded on the sliding sleeve block, and the middle part of spring one is wrapped around the slide bar, and the adjacent ends of the two sliding sleeve blocks are fixed on the long rod.

[0018] Through the above technical solution, when the long rod moves, the sliding sleeve is driven to slide on the sliding rod, thereby ensuring that the long rod will not deviate when moving.

[0019] As a further improvement of the above scheme, the meshing unit includes a rack plate, a driven gear, an inner rotating rod, the rack plate is fixed on the long rod, and one end of the inner rotating rod is arranged in the second motion groove through a bearing, and the driven gear is fixed on the inner rotating rod, and the rack plate and the driven gear constitute a meshing connection structure.

[0020] Through the above technical solution, the rack plate and the driven gear are meshed and connected, so that when the long rod moves, the driven gear is driven to rotate, and then the lamp housing is driven to rotate. It is labor-saving and the cost is relatively low.

[0021] As a further improvement of the above scheme, the anti-reversal unit includes bevel gear 1, bevel gear 2, a receiving groove, an abutment block, a round rod, spring 2, an outer rotating rod and a stop block. A plurality of the receiving grooves are evenly spaced at the other end of the inner rotating rod. Both ends of the round rod are arranged in the receiving groove through bearings, and one end of the abutment block is fixed on the round rod. One end of the spring 2 is welded in the receiving groove, and the other end of the spring 2 is welded to the abutment block. One end of the outer rotating rod is fixed in the moving groove 2 through a bearing, and a plurality of stop blocks are evenly fixed in the outer rotating rod. The other end of the abutment block contacts the stop block. The bevel gear 1 is fixed on the outer rotating rod, and the bevel gear 1 and bevel gear 2 constitute an engaging connection structure.

[0022] According to the above technical solution, when the inner rotating rod rotates clockwise, the outer rotating rod is driven to rotate.

[0023] Then the bevel gear 1 also rotates, and the bevel gear 2 also drives the fixed plate to rotate, so the lamp housing is flipped 180 degrees. When the inner rotating rod rotates counterclockwise, the inner rotating rod will squeeze the abutment block into the storage groove when moving, and compress the spring 2. Then the outer rotating rod will not rotate, so that the lamp housing can be stably polished after being rotated by the fixed plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The utility model can grind the sealing part of the lamp housing under the action of the rotating mechanism, and when the grinding work on the sealing part of one end of the lamp housing stops, the lamp housing can be driven to rotate 180 degrees in cooperation with the deformation mechanism. Then the direction of the lamp housing is turned so that the un-grinded sealing part is located on the rotating mechanism for grinding. The structure is simple and the cost is relatively low, and the automation setting also reduces the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a lamp tube sealing and polishing device for lamp production provided in Example 1 of the utility model;

[0027] Figure 2 It is a schematic diagram of the front cross-sectional structure of a lamp tube sealing and polishing device for lamp production;

[0028] Figure 3 A lamp tube sealing and polishing device for lamp production Figure 2 A schematic diagram of the cross-sectional structure from top view at C in the middle;

[0029] Figure 4 It is a schematic diagram of a plan view of the long rod structure of a lamp tube sealing and polishing device for lamp production;

[0030] Figure 5 A lamp tube sealing and polishing device for lamp production Figure 2 The structural diagram at A in the middle;

[0031] Figure 6 A lamp tube sealing and polishing device for lamp production Figure 2 Schematic diagram of the structure at B in the figure.

[0032] Description of main symbols:

[0033] 1. Lamp housing; 2. Needle; 3. Base; 4. Motor; 5. Gear 1; 6. Gear 2; 7. Outer sleeve; 8. Arc block; 9. Arc groove; 10. Inner sleeve; 11. Connecting plate; 12. Spherical block; 13. Hemispherical groove; 14. Needle groove; 15. Arc plate; 16. Grinding block; 17. Housing; 18. Motion groove 1; 19. Slide rod groove; 20. Slide rod; 21. Sliding sleeve block; 22. Spring 1; 23. Long rod; 24. Delay block 1; 25. Delay block 2; 26. Rack plate; 27. Driven gear; 28. Inner rotating rod; 29. ​​Bevel gear 1; 30. Bevel gear 2; 31. Moving groove 2; 32. Connecting rod; 33. Fixed plate; 34. Placement groove; 35. Support plate; 36. Storage groove; 37. Abutment block; 38. Round rod; 39. Spring 2; 40. Outer rotating rod; 41. Stopper. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0035] Embodiment 1:

[0036] Please combine Figure 1-6 The lamp tube sealing and polishing device for lamp production of this embodiment comprises a lamp housing 1, a needle 2 and a base 3. The needles 2 are fixed at both ends of the lamp housing 1. The base 3 is provided with a limiting mechanism, and the outer part of the lamp housing 1 is limited on the base 3 by the limiting mechanism.

[0037] Rotation mechanism, the rotation mechanism includes a motor 4, a gear 1 5, a gear 2 6, an outer sleeve 7, an inner sleeve 10, a connecting plate 11, an arc plate 15, a grinding block 16 and a sliding unit. A driving rod is provided in the middle of the gear 1 5. The output end of the motor 4 is connected to the driving rod in the middle of the gear 1 5. The gear 1 5 and the gear 2 6 form a meshing connection. The gear 2 6 is fixed to the outside of the outer sleeve 7. One end of the arc plate 15 is arranged outside the outer sleeve 7, and the grinding block 16 is arranged at one end of the arc plate 15 close to the outer sleeve 7. One end of the inner sleeve 10 is fixed to the base 3 in the outer sleeve 7, and the connecting plate 11 is fixed to the other end of the inner sleeve 10;

[0038] The deformation mechanism includes a shell 17, a motion groove 18, a spring 122, a long rod 23, a delay block 124, a delay block 25, a motion groove 31, a support plate 35 and a deformation unit. The shell 17 is fixed on the base 3, and the motion groove 18 is opened in the shell 17. The support plate 35 is fixed on the base 3 on the side of the shell 17 away from the gear 2 6, and the motion groove 2 31 is opened in the support plate 35. The motion groove 18, the motion groove 2 31 and the outside of the shell 17 are connected to form a channel 1 for the long rod 23 to move. The long rod 23 is connected to the spring 12 through the deformation unit to drive the long rod 23 to move in the channel 1. Multiple delay blocks 25 are fixed on the long rod 23 at equal distances, and multiple delay blocks 1 24 are fixed in the motion groove 18 at equal distances. The delay block 1 24 and the delay block 2 25 are in contact with each other on the outside.

[0039] Because both ends of the teeth of gear 2 6 are inclined surfaces, and the side of the long rod 23 close to gear 2 6 is also inclined, when gear 2 6 rotates, the two inclined surfaces contact each other, and the long rod 23 can be pressed into the motion groove 1 18.

[0040] By setting the shapes of the delay block 1 24 and the delay block 2 25 to be isosceles trapezoids, the long rod 23 can be squeezed into the motion groove 1 18 when the gear 2 6 rotates. The delay block 1 24 and the delay block 2 25 fit each other to give the long rod 23 a resistance to the motion groove 1 18. At the same time, under the rebound potential energy of the spring 1 22, a thrust is given to the long rod 23 to the outside of the motion groove 1 18, and the thrust is greater than the resistance. However, since the gear 2 6 continuously presses the long rod 23 when rotating, and the time that the gear 2 6 presses the long rod 23 is less than the time that the spring 1 22 drives the long rod 23 to move out of the motion groove 1 18, the long rod 23 is relatively stably located in the motion groove 1 18 when the gear 2 6 rotates.

[0041] The limiting mechanism includes a bevel gear 2 30, a connecting rod 32, a fixing plate 33, a placement groove 34 and an anti-skid rubber pad. A rotation groove is provided at one end of the moving groove 21 for the connecting rod 32 to rotate, and a bevel gear 2 30 is fixed to one end of the connecting rod 32. The other end of the connecting rod 32 is fixed through the rotation groove and the fixing plate 33, and the placement groove 34 is provided on the fixing plate 33. The anti-skid rubber pad is arranged in the placement groove 34 to increase the friction between the lamp housing 1 and the placement groove 34.

[0042] The implementation principle of the lamp tube sealing and polishing device for lamp production in the present application is as follows: when polishing the sealing part of the lamp housing 1, first replace the fixing plate 33 and the arc plate 15 of different diameters according to the lamp housing 1 of different diameters, then pick up the lamp housing 1, let one end of it pass through the placement groove 34, and the sealing part of one end of the lamp housing 1 fits with the polishing block 16. Start the motor 4, so that the motor 4 drives the gear 1 5 to rotate, and the gear 2 6 is also driven to rotate under the meshing connection between the gear 1 5 and the gear 2 6. Let the outer sleeve 7 also rotate so that the arc block 8 rotates in the arc groove 9, the hemispherical groove 13 rotates around the outside of the spherical block 12, and the arc plate 15 drives the polishing block 16 to rotate, and then under the relatively high-speed rotation, the polishing block 16 will polish the burrs at the sealing part of the lamp housing 1.

[0043] During the rotation of gear 26, it will constantly contact with the long rod 23. The time when gear 26 and the long rod 23 are not in contact is less than the time required for the time delay block 1 24 and the time delay block 25 to deform and move away due to the elastic potential energy of the spring 1 22. Therefore, when gear 26 rotates, the long rod 23 will always be located in the motion groove 18. When gear 26 stops rotating, the arc plate 15 is located at the end close to the housing 17, and gear 26 is not in contact with the long rod 23. Under the action of the elastic potential energy of the spring 1 22, the long rod 23 is moved out of the motion groove 18, causing the time delay block 1 24 and the time delay block 25 to deform, thereby causing the long rod 23 to gradually move out of the motion groove 18 so that the long rod 23 is located between two adjacent teeth on gear 26. During the moving process, the sliding sleeve block 2 1 slides outside the slide bar 20, and drives the rack plate 26 to rotate. Under the meshing connection between the rack plate 26 and the driven gear 27, the driven gear 27 is also rotated. The driven gear 27 drives the inner rotating rod 28 to rotate clockwise, so that the abutment block 37 is stretched between two adjacent stoppers 41, driving the outer rotating rod 40 to rotate, and then driving the bevel gear 1 29 to rotate. Under the meshing connection between the bevel gear 1 29 and the bevel gear 2 30, the bevel gear 2 30 is driven to rotate, so that the connecting rod 32 The fixing plate 33 is also driven to rotate (the elastic potential energy of the spring 22 drives the long rod 23 to move out of the moving groove 18 by a distance that just allows the fixing plate 33 to rotate 180 degrees), so that the lamp housing 1 rotates 180 degrees, and then the sealing part of the lamp housing 1 for grinding is located at one end of the grinding block 16, and the two needles 2 are re-contacted in the needle groove 14, and the motor 4 is started again, driving the gear 1 5 to rotate, so that the gear 2 6 also rotates, and then driving the grinding block 16 to rotate, sealing the lamp housing 1 At this time, the gear 2 6 will push the long rod 23 into the moving groove 18 when it rotates, so that the delay block 1 24 and the delay block 2 25 will re-contact and squeeze, compress the spring 1 22, and at the same time drive the driven gear 27 to rotate counterclockwise, and then the inner rotating rod 28 will also rotate counterclockwise, which will compress the spring 2 39, and the abutment block 37 will be squeezed into the storage groove 36 around the round rod 38 by the stop block 41, and then will not drive the outer rotating rod 40 to rotate, so that the sealing part of the lamp housing 1 can be polished more stably.

[0044] Embodiment 2:

[0045] Combination Figure 1-6Based on Example 1, this embodiment is further improved in that: the sliding unit includes an arc block 8, an arc groove 9, a spherical block 12, a hemispherical groove 13 and a needle groove 14, one end of the two arc blocks 8 are fixed to one end of the outer sleeve 7, and the arc groove 9 is opened on the base 3, the other end of the arc block 8 slides in the arc groove 9, the hemispherical groove 13 is opened at the other end of the outer sleeve 7, one end of the spherical block 12 is fixed to one end of the connecting plate 11, and the other end of the spherical block 12 is in contact with the hemispherical groove 13, and the two needle grooves 14 are opened at the other end of the connecting plate 11.

[0046] The deformation unit includes a slide bar groove 19, a slide bar 20, a sliding sleeve block 21, an engagement unit and an anti-reversal unit. The two slide bar grooves 19 are both opened in the motion groove 18, and both ends of the two slide bars 20 are fixed in the slide bar groove 19. The sliding sleeve block 21 slides on the slide bar groove 19, and one end of the spring 22 is welded in the slide bar groove 19, the other end of the spring 22 is welded on the sliding sleeve block 21, and the middle part of the spring 22 is wrapped around the slide bar 20, and the adjacent ends of the two sliding sleeve blocks 21 are fixed on the long rod 23.

[0047] The meshing unit includes a rack plate 26, a driven gear 27, an inner rotating rod 28, the rack plate 26 is fixed on the long rod 23, and one end of the inner rotating rod 28 is arranged in the motion groove 2 31 through a bearing, and the driven gear 27 is fixed on the inner rotating rod 28, and the rack plate 26 and the driven gear 27 constitute a meshing connection structure.

[0048] The anti-reversal unit includes a bevel gear 1 29, a bevel gear 2 30, a receiving groove 36, an abutment block 37, a round rod 38, a spring 2 39, an outer rotating rod 40 and a stopper 41. A plurality of receiving grooves 36 are evenly spaced at the other end of the inner rotating rod 28. Both ends of the round rod 38 are arranged in the receiving groove 36 through bearings, and one end of the abutment block 37 is fixed on the round rod 38. One end of the spring 2 39 is welded in the receiving groove 36, and the other end of the spring 2 39 is welded to the abutment block 37. One end of the outer rotating rod 40 is fixed in the motion groove 2 31 through a bearing, and a plurality of stoppers 41 are evenly spaced and fixed in the outer rotating rod 40. The other end of the abutment block 37 contacts the stopper 41. The bevel gear 1 29 is fixed on the outer rotating rod 40, and the bevel gear 1 29 and the bevel gear 2 30 form a meshing connection structure.

[0049] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A lamp tube sealing and polishing device for lamp production, characterized in that: include: A lamp housing, a needle and a base, wherein the two ends of the lamp housing are fixed with needles, the base is provided with a limiting mechanism, and the outside of the lamp housing is limited on the base by the limiting mechanism; A rotating mechanism, the rotating mechanism comprising a motor, a gear 1, a gear 2, an outer sleeve, an inner sleeve, a connecting plate, an arc plate, a grinding block and a sliding unit, a driving rod is provided in the middle of the gear 1, an output end of the motor is connected to the driving rod in the middle of the gear 1, the gear 1 and the gear 2 form a meshing connection, the gear 2 is fixed to the outside of the outer sleeve, one end of the arc plate is arranged outside the outer sleeve, and the grinding block is arranged at one end of the arc plate close to the outer sleeve, one end of the inner sleeve is fixed to a base in the outer sleeve, and the connecting plate is fixed to the other end of the inner sleeve; A deformation mechanism, the deformation mechanism includes a shell, a motion groove 1, a spring 1, a long rod, a delay block 1, a delay block 2, a motion groove 2, a support plate and a deformation unit, the shell is fixed on the base, and the motion groove 1 is opened in the shell, the support plate is fixed on the base of the shell away from the gear 2 side, and the motion groove 2 is opened in the support plate, the motion groove 1, the motion groove 2 and the outside of the shell are connected to form a channel 1 for the long rod to move, the long rod is connected to the spring 1 through the deformation unit to drive the long rod to move in the channel 1, multiple delay blocks 2 are fixed on the long rod at equal distances, and multiple delay blocks 1 are fixed in the motion groove 1 at equal distances, and the delay block 1 is in contact with the outside of the delay block 2.

2. A lamp tube sealing and polishing device for lamp production as claimed in claim 1, characterized in that: The limiting mechanism includes a second bevel gear, a connecting rod, a fixed plate, a placement groove and an anti-skid rubber pad. A rotation groove is provided at one end of the second motion groove for the connecting rod to rotate, and a second bevel gear is fixed to one end of the connecting rod. The other end of the connecting rod is fixed through the rotation groove and the fixed plate, and the placement groove is provided on the fixed plate. The anti-skid rubber pad is arranged in the placement groove to increase the friction between the lamp housing and the placement groove.

3. A lamp tube sealing and polishing device for lamp production as claimed in claim 1, characterized in that: The sliding unit includes an arc block, an arc groove, a spherical block, a hemispherical groove and a needle groove. One end of the two arc blocks is fixed to one end of the outer sleeve, and the arc groove is opened on the base. The other end of the arc block slides in the arc groove. The hemispherical groove is opened at the other end of the outer sleeve. One end of the spherical block is fixed to one end of the connecting plate, and the other end of the spherical block is in contact with the hemispherical groove. The two needle grooves are opened at the other end of the connecting plate.

4. A lamp tube sealing and polishing device for lamp production as claimed in claim 1, characterized in that: The deformation unit includes a slide bar groove, a slide bar, a slide sleeve block, an engagement unit and an anti-reversal unit. The two slide bar grooves are both opened in the motion groove one, and both ends of the two slide bars are fixed in the slide bar groove. The slide sleeve block slides on the slide bar groove, and one end of the spring one is welded in the slide bar groove, the other end of the spring one is welded on the slide sleeve block, and the middle part of the spring one is wrapped around the slide bar, and the adjacent ends of the two slide sleeve blocks are fixed on the long rod.

5. A lamp tube sealing and polishing device for lamp production as claimed in claim 4, characterized in that: The meshing unit includes a rack plate, a driven gear, and an inner rotating rod. The rack plate is fixed on the long rod, and one end of the inner rotating rod is arranged in the second motion groove through a bearing, and the driven gear is fixed on the inner rotating rod. The rack plate and the driven gear constitute a meshing connection structure.

6. A lamp tube sealing and polishing device for lamp production as claimed in claim 4, characterized in that: The anti-reversal unit includes bevel gear 1, bevel gear 2, a receiving groove, an abutment block, a round rod, spring 2, an outer rotating rod and a stopper. A plurality of the receiving grooves are evenly spaced at the other end of the inner rotating rod. Both ends of the round rod are arranged in the receiving groove through bearings, and one end of the abutment block is fixed on the round rod. One end of the spring 2 is welded in the receiving groove, and the other end of the spring 2 is welded to the abutment block. One end of the outer rotating rod is fixed in the moving groove 2 through a bearing, and a plurality of stoppers are evenly fixed in the outer rotating rod. The other end of the abutment block contacts the stopper. The bevel gear 1 is fixed on the outer rotating rod, and the bevel gear 1 and bevel gear 2 form a meshing connection structure.

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