CN214393623U

CN214393623U - Optical lens polishing machine

Info

Publication number: CN214393623U
Application number: CN202022946230.0U
Authority: CN
Inventors: 李青; 李兴文; 赵锐
Original assignee: Chengdu Aojing Innovation Technology Co ltd
Current assignee: Chengdu Aojing Innovation Technology Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-10-15
Anticipated expiration: 2030-12-11

Abstract

The utility model provides an optical lens piece burnishing machine relates to optical lens piece's production technical field. The optical lens polishing machine comprises a base, a polishing assembly and a fixing assembly. A supporting rod is fixed on the base and is connected with a top plate along the radial direction. The polishing assembly comprises a mounting plate, a first rotating motor and a polishing sheet. The fixed assembly comprises a workbench, an exhaust tube and an exhaust pump. The workbench is internally and longitudinally provided with a first channel communicated with the central groove, the first channel is radially communicated with a second channel, a supporting plate is fixedly arranged at the left section of the second channel, a through hole is formed in the supporting plate, a piston is arranged at the right section of the second channel in a sliding mode, and a pressure spring is arranged between the supporting plate and the piston. An air inlet pipe is arranged on the second channel. The optical lens polishing machine is simple and convenient to operate. And when the power of the air pump is overlarge and the suction force to the optical lens is overlarge, external air is introduced, so that the negative pressure on the optical lens is reduced, and the optical lens is prevented from being damaged.

Description

Optical lens polishing machine

Technical Field

The utility model belongs to the technical field of the production technique of optical lens piece and specifically relates to an optical lens piece burnishing machine is related to.

Background

Polishing refers to a process of reducing the roughness of a workpiece surface by mechanical, chemical, or electrochemical actions to obtain a bright, flat surface. Polishing does not improve the dimensional or geometric accuracy of the workpiece, but gives a smooth surface or a mirror finish.

In the prior art, a plurality of clamping components are arranged in the circumferential direction of an optical lens, and are pushed by a screw rod to be tightly attached to the side surface of the optical lens, so that the optical lens is fixed, and then the polishing is carried out through a polishing sheet, so that the surface of the optical lens is smooth. However, in the process of fixing the optical lens, it is necessary to screw a plurality of screws so that the optical lens is clamped and fixed by the clamping members, which is troublesome to operate and has low production efficiency.

Disclosure of Invention

To the above situation, for overcoming prior art's defect, the utility model provides an optical lens piece burnishing machine has solved current optical lens piece when the polishing, needs to twist a plurality of screws to optical lens piece's fixed to make each clamping part press from both sides tight fixed optical lens piece jointly, complex operation, technical problem that production efficiency is low.

In order to achieve the above object, the utility model provides a following technical scheme:

an optical lens polishing machine mainly comprises: base, polishing subassembly and fixed subassembly.

A supporting rod is fixed on the base and is connected with a top plate along the radial direction.

The polishing assembly comprises a mounting plate, a first rotating motor and a polishing sheet. The downside at the roof is connected to the mounting panel, and first rotating electrical machines installs on the mounting panel, and the polishing piece links to each other with first rotating electrical machines transmission.

The fixed assembly comprises a workbench, an exhaust tube and an exhaust pump. A central groove for placing optical lenses is formed in the top of the workbench, a first channel communicated with the central groove is longitudinally formed in the workbench, the lower end of the first channel is sequentially communicated with the air exhaust pipe and the air exhaust pump, the air exhaust pipe is provided with a valve, and the air inlet of the air exhaust pump is connected with the air exhaust pipe through a flange. The radial intercommunication of first passageway has the second passageway, and the right-hand member and the workstation of second passageway communicate outward, and the left section of second passageway has set firmly a backup pad, has the through-hole in the backup pad, and the right side section cunning of second passageway is furnished with the piston, is provided with the pressure spring between backup pad and the piston, and the both ends of pressure spring are fixed in backup pad and piston respectively. An air inlet pipe is arranged on the second channel, the two ends of the air inlet pipe are communicated with the second channel, one end of the air inlet pipe is located on the left side of the supporting plate, and the other end of the air inlet pipe is located between the supporting plate and the piston.

The mounting plate, the first rotating motor and the polishing sheet are arranged, and the optical lens can be polished through the polishing sheet. The setting of workstation, exhaust tube and aspiration pump can make optical lens fix on the workstation through the aspiration pump after placing optical lens on the workstation, easy operation, convenience. The second channel, the supporting plate, the piston, the pressure spring and the air inlet pipe are arranged, so that the external air can be introduced when the power of the air extracting pump is too large and the suction force to the optical lens is too strong, the negative pressure on the optical lens is reduced, and the optical lens is prevented from being damaged.

The utility model discloses an in some embodiments, be fixed with the second rotating electrical machines on the above-mentioned base, be fixed with drive bevel gear on the output shaft of second rotating electrical machines, drive bevel gear meshes has driven bevel gear, installs the lead screw along its axial in the bracing piece, and driven bevel gear fixes the hypomere at the lead screw. Install first nut on the lead screw, the spout has been seted up to one side of bracing piece, is provided with the first slider rather than matching in the spout, and first nut is fixed in the first slider, and one side at first slider is fixed to the one end of roof.

The second rotating motor, the driving bevel gear, the driven bevel gear, the screw rod, the first nut, the sliding groove and the first sliding block are arranged, so that the polishing sheet can be lifted conveniently.

The utility model discloses an in some embodiments, install the second nut on the above-mentioned lead screw, be provided with the second slider rather than matching in the spout, the second slider is located the below of first slider, and the second slider passes through the connecting rod with first slider and links to each other, is fixed with the reinforcing plate on the roof, and the reinforcing plate is kept away from the one end of roof and is fixed on the second slider.

The bearing capacity of the top plate can be improved due to the arrangement of the second nut, the second sliding block, the connecting rod and the reinforcing plate.

In some embodiments of the present invention, a dust hood is fixed on the reinforcing plate, and an exhaust fan communicated with the dust hood is fixed on the base.

The dust cage and the exhaust fan are arranged, so that dust above the workbench can be sucked away, the dust is prevented from falling on the optical lens, fine waste scraps generated during the working process of the polishing sheet can be sucked away, and the fine waste scraps are prevented from being sucked into the lung by an operator.

In some embodiments of the present invention, the exhaust fan is connected to the water tank, and the dust hood, the exhaust fan and the water tank are connected to each other through the conduit.

The arrangement of the water tank is convenient for the treatment of the waste scraps and the dust.

The utility model discloses an in some embodiments, be fixed with the connecting block on above-mentioned first rotating electrical machines's the output shaft, square groove has been seted up to the bottom of connecting block, and the opening part in square groove has set firmly anticreep portion, and square inslot sliding fit has the movable block rather than matching, is provided with buffer spring in the square groove, and buffer spring's both ends are fixed in the bottom in movable block and square groove respectively. The lower side of the movable block is fixedly provided with a movable rod, and the polishing sheet is fixed at the lower end of the movable rod.

The setting of connecting block, square groove, anticreep portion, movable block, buffer spring and movable rod can avoid polishing the piece too big to optical lens's pressure, and damage optical lens.

In some embodiments of the present invention, the optical lens polishing machine further includes a third rotating electrical machine, and the third rotating electrical machine is fixed on the top plate. The output shaft of the third rotating motor is fixed on the right section of the mounting plate, and the polishing sheet is positioned on the left side of the third rotating motor.

The third rotating motor is arranged, so that the polishing sheet can rotate around the third rotating motor while being transmitted by itself, and the optical lens is conveniently polished.

In some embodiments of the present invention, an adjusting plate is slidably connected to an upper side of the mounting plate. Particularly, the bottom of regulating plate is T shape, and the bottom sliding fit of mounting panel and regulating plate. First rotating electrical machines is fixed on the regulating plate, and the top of regulating plate has set firmly a pinion rack, and the pinion rack meshing has adjusting gear, and adjusting gear fixes on third rotating electrical machines's output shaft.

The arrangement of the adjusting plate, the toothed plate and the adjusting gear enables an operator to properly adjust the transverse distance between the polishing sheet and the third rotating motor according to needs, so that the rotating radius of the polishing sheet rotating around the third rotating motor can be adjusted.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

1. the mounting plate, the first rotating motor and the polishing sheet are arranged, and the optical lens can be polished through the polishing sheet. The setting of workstation, exhaust tube and aspiration pump can make optical lens fix on the workstation through the aspiration pump after placing optical lens on the workstation, easy operation, convenience. The second channel, the supporting plate, the piston, the pressure spring and the air inlet pipe are arranged, so that the external air can be introduced when the power of the air extracting pump is too large and the suction force to the optical lens is too strong, the negative pressure on the optical lens is reduced, and the optical lens is prevented from being damaged.

2. The second rotating motor, the driving bevel gear, the driven bevel gear, the screw rod, the first nut, the sliding groove and the first sliding block are arranged, so that the polishing sheet can be lifted conveniently.

3. The setting of connecting block, square groove, anticreep portion, movable block, buffer spring and movable rod can avoid polishing the piece too big to optical lens's pressure, and damage optical lens.

4. The arrangement of the adjusting plate, the toothed plate and the adjusting gear enables an operator to properly adjust the transverse distance between the polishing sheet and the third rotating motor according to needs, so that the rotating radius of the polishing sheet rotating around the third rotating motor can be adjusted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical lens polishing machine provided in this embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1 at location II;

FIG. 3 is an enlarged view of a portion of position III of FIG. 1;

fig. 4 is a schematic structural diagram of a square groove and a movable block provided in this embodiment;

fig. 5 is a schematic structural view illustrating that the first rotating electrical machine of the present embodiment is fixed on the adjusting plate.

Icon: 1-optical lens polishing machine, 11-base, 111-support rod, 112-top plate, 113-second rotating motor, 114-driving bevel gear, 115-driven bevel gear, 116-lead screw, 117-first nut, 118-sliding groove, 119-first sliding block, 121-second nut, 122-second sliding block, 123-connecting rod, 124-reinforcing plate, 125-dust-collecting hood, 126-exhaust fan, 127-water tank, 131-mounting plate, 132-first rotating motor, 133-polishing sheet, 134-connecting block, 135-square groove, 136-anti-drop part, 137-movable block, 138-buffer spring, 139-movable rod, 151-workbench, 152-exhaust tube, 153-air pump, 154-central groove, 155-first channel, 156-flange, 157-second channel, 158-support plate, 159-through hole, 161-piston, 162-pressure spring, 163-air inlet pipe, 171-third rotating motor, 172-adjusting plate, 173-toothed plate, 174-adjusting gear, 3-optical lens.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not in direct contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 5, the present embodiment provides an optical lens polishing machine 1, which mainly includes: a base 11, a polishing assembly and a holding assembly.

A support rod 111 is fixed on the base 11, and a top plate 112 is connected to the support rod 111 along the radial direction.

The polishing assembly includes a mounting plate 131, a first rotating motor 132, and a polishing pad 133. The mounting plate 131 is connected to the lower side of the top plate 112, the first rotating motor 132 is mounted on the mounting plate 131, and the polishing sheet 133 is drivingly connected to the first rotating motor 132.

A fixed assembly including a table 151, a suction pipe 152, and a suction pump 153. The top of the worktable 151 is provided with a central groove 154 for placing the optical lens 3, a first channel 155 communicated with the central groove 154 is longitudinally arranged in the worktable 151, the lower end of the first channel 155 is sequentially communicated with the air suction pipe 152 and the air suction pump 153, the air suction pipe 152 is provided with a valve, and an air inlet of the air suction pump 153 is connected with the air suction pipe 152 through a flange 156. The first channel 155 is radially communicated with a second channel 157, the right end of the second channel 157 is communicated with the outside of the workbench 151, a support plate 158 is fixedly arranged at the left section of the second channel 157, a through hole 159 is formed in the support plate 158, a piston 161 is slidably arranged at the right section of the second channel 157, a pressure spring 162 is arranged between the support plate 158 and the piston 161, and two ends of the pressure spring 162 are respectively fixed to the support plate 158 and the piston 161. An air inlet pipe 163 is arranged on the second channel 157, two ends of the air inlet pipe 163 are communicated with the second channel 157, one end of the air inlet pipe 163 is positioned on the left side of the supporting plate 158, and the other end of the air inlet pipe 163 is positioned between the supporting plate 158 and the piston 161.

The mounting plate 131, the first rotating electric machine 132, and the polishing sheet 133 are provided so that the optical lens 3 can be polished by the polishing sheet 133. The arrangement of the worktable 151, the air suction pipe 152 and the air suction pump 153 can fix the optical lens 3 on the worktable 151 through the air suction pump 153 after the optical lens 3 is placed on the worktable 151, and the operation is simple and convenient. The second channel 157, the support plate 158, the piston 161, the pressure spring 162 and the air inlet pipe 163 are arranged to introduce outside air when the power of the air pump 153 is too high and the suction force to the optical lens 3 is too strong, so as to reduce the negative pressure applied to the optical lens 3 and prevent the optical lens 3 from being damaged.

In some embodiments of the present invention, the second rotating electrical machine 113 is fixed on the base 11, the driving bevel gear 114 is fixed on the output shaft of the second rotating electrical machine 113, the driving bevel gear 114 is engaged with the driven bevel gear 115, the screw 116 is installed in the support rod 111 along the axial direction thereof, and the driven bevel gear 115 is fixed at the lower segment of the screw 116. The screw 116 is provided with a first nut 117, one side of the support rod 111 is provided with a sliding groove 118, the sliding groove 118 is internally provided with a first sliding block 119 matched with the sliding groove 118, the first nut 117 is fixed in the first sliding block 119, and one end of the top plate 112 is fixed at one side of the first sliding block 119.

The second rotating motor 113, the drive bevel gear 114, the driven bevel gear 115, the lead screw 116, the first nut 117, the slide slot 118, and the first slider 119 are provided to facilitate the lifting of the polishing pad 133.

In some embodiments of the present invention, the second nut 121 is installed on the lead screw 116, the second sliding block 122 matched with the lead screw is disposed in the sliding groove 118, the second sliding block 122 is located below the first sliding block 119, the second sliding block 122 is connected to the first sliding block 119 through the connecting rod 123, the top plate 112 is fixed with the reinforcing plate 124, and one end of the reinforcing plate 124, which is far away from the top plate 112, is fixed on the second sliding block 122.

The second nut 121, the second slider 122, the connecting rod 123, and the reinforcing plate 124 are provided to improve the load-bearing capacity of the top plate 112.

In some embodiments of the present invention, a dust hood 125 is fixed on the reinforcement plate 124, and an exhaust fan 126 communicated with the dust hood 125 is fixed on the base 11.

The dust collecting hood 125 and the exhaust fan 126 can not only draw away dust above the worktable 151 to prevent the dust from falling on the optical lens 3, but also draw away fine waste generated during the operation of the polishing sheet 133 to prevent the fine waste from being sucked into the lung by an operator.

In some embodiments of the present invention, the exhaust fan 126 is connected to the water tank 127, and the dust hood 125, the exhaust fan 126 and the water tank 127 are connected in sequence through a conduit.

The water tank 127 is provided to facilitate disposal of debris and dust.

The utility model discloses an in some embodiments, be fixed with connecting block 134 on the output shaft of above-mentioned first rotating electrical machines 132, square groove 135 has been seted up to the bottom of connecting block 134, and the opening part of square groove 135 has set firmly anticreep portion 136, and the sliding fit has the movable block 137 rather than matching in the square groove 135, is provided with buffer spring 138 in the square groove 135, and buffer spring 138's both ends are fixed in the bottom of movable block 137 and square groove 135 respectively. The lower side of the movable block 137 is fixedly provided with a movable rod 139, and the polishing sheet 133 is fixed at the lower end of the movable rod 139. The arrangement of the connecting block 134, the square groove 135, the anti-dropping portion 136, the movable block 137, the buffer spring 138 and the movable rod 139 can prevent the polishing sheet 133 from pressing the optical lens 3 too much to damage the optical lens 3.

In some embodiments of the present invention, the optical lens polishing machine 1 further includes a third rotating motor 171, and the third rotating motor 171 is fixed on the top plate 112. The output shaft of the third rotating motor 171 is fixed to the right section of the mounting plate 131, and the polishing sheet 133 is located on the left side of the third rotating motor 171. The third rotating motor 171 is arranged, so that the polishing sheet 133 can rotate around the third rotating motor 171 while being transmitted by itself, thereby facilitating the polishing of the optical lens 3.

In some embodiments of the present invention, the upper side of the mounting plate 131 is slidably connected to an adjusting plate 172, the first rotating electrical machine 132 is fixed on the adjusting plate 172, a toothed plate 173 is fixed on the top of the adjusting plate 172, the toothed plate 173 is engaged with an adjusting gear 174, and the adjusting gear 174 is fixed on the output shaft of the third rotating electrical machine 171. The arrangement of the adjustment plate 172, the toothed plate 173, and the adjustment gear 174 allows an operator to appropriately adjust the lateral distance between the polishing sheet 133 and the third rotating motor 171 as necessary to adjust the turning radius of the polishing sheet 133 rotating about the third rotating motor 171.

The working principle of the optical lens polishing machine 1 is as follows:

after placing optical lens 3 in central groove 154, suction pump 153 moves, make optical lens 3 adsorb on workstation 151, rethread second rotating electrical machines 113 adjusts the height of polishing piece 133, make polishing piece 133 paste the upside at optical lens 3, restart first rotating electrical machines 132, first rotating electrical machines 132 drives polishing piece 133 rotatory, restart third rotating electrical machines 171, third rotating electrical machines 171 drives mounting panel 131 and pinion rack 173 simultaneously, mounting panel 131 drives polishing piece 133 and rotates around third rotating electrical machines 171, pinion rack 173 drives polishing piece 133 and is close to or keeps away from third rotating electrical machines 171, in order to realize the polishing to optical lens 3.

When the power of the air pump 153 is too large, the piston 161 moves to the left to compress the compression spring 162, and when the piston 161 moves to the left side of the right end of the air inlet pipe 163, the air inlet pipe 163 introduces the external air into the first channel 155 to reduce the negative pressure applied to the optical lens 3, thereby avoiding damaging the optical lens 3.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical lens polishing machine, comprising:

the supporting rod is fixed on the base and is connected with a top plate along the radial direction of the supporting rod;

the polishing assembly comprises a mounting plate, a first rotating motor and a polishing sheet; the mounting plate is connected to the lower side of the top plate, the first rotating motor is mounted on the mounting plate, and the polishing sheet is in transmission connection with the first rotating motor;

the fixed assembly comprises a workbench, an exhaust tube and an exhaust pump; the top of the workbench is provided with a central groove for placing an optical lens, a first channel communicated with the central groove is longitudinally arranged in the workbench, the lower end of the first channel is sequentially communicated with the air suction pipe and the air suction pump, the air suction pipe is provided with a valve, and an air inlet of the air suction pump is connected with the air suction pipe through a flange; the first channel is radially communicated with a second channel, the right end of the second channel is communicated with the outside of the workbench, a supporting plate is fixedly arranged at the left section of the second channel, a through hole is formed in the supporting plate, a piston is arranged at the right section of the second channel in a sliding mode, a pressure spring is arranged between the supporting plate and the piston, and two ends of the pressure spring are respectively fixed to the supporting plate and the piston; an air inlet pipe is arranged on the second channel, two ends of the air inlet pipe are communicated with the second channel, one end of the air inlet pipe is located on the left side of the supporting plate, and the other end of the air inlet pipe is located between the supporting plate and the piston.

2. The optical lens polishing machine according to claim 1, wherein a second rotating motor is fixed on the base, a driving bevel gear is fixed on an output shaft of the second rotating motor, the driving bevel gear is engaged with a driven bevel gear, a lead screw is installed in the support rod along the axial direction of the support rod, and the driven bevel gear is fixed on the lower section of the lead screw; the lead screw is provided with a first nut, one side of the supporting rod is provided with a sliding groove, a first sliding block matched with the sliding groove is arranged in the sliding groove, the first nut is fixed in the first sliding block, and one end of the top plate is fixed on one side of the first sliding block.

3. The optical lens polishing machine according to claim 2, wherein a second nut is mounted on the screw, a second slider matched with the screw is arranged in the chute, the second slider is located below the first slider, the second slider is connected with the first slider through a connecting rod, a reinforcing plate is fixed on the top plate, and one end of the reinforcing plate, which is far away from the top plate, is fixed on the second slider.

4. The optical lens polishing machine according to claim 3, wherein a dust hood is fixed to the reinforcing plate, and an exhaust fan communicating with the dust hood is fixed to the base.

5. The optical lens polishing machine according to claim 4, wherein the exhaust fan is communicated with a water tank, and the dust collection hood, the exhaust fan and the water tank are sequentially connected through a conduit.

6. The optical lens polishing machine according to claim 1, wherein a connecting block is fixed to an output shaft of the first rotating motor, a square groove is formed in the bottom of the connecting block, an anti-drop portion is fixed to an opening of the square groove, a movable block matched with the square groove is slidably arranged in the square groove, a buffer spring is arranged in the square groove, and two ends of the buffer spring are fixed to the movable block and the bottom of the square groove respectively; the lower side of the movable block is fixedly provided with a movable rod, and the polishing sheet is fixed at the lower end of the movable rod.

7. The optical lens polishing machine according to any one of claims 1 to 6, further comprising a third rotating motor fixed to the top plate; the output shaft of the third rotating motor is fixed to the right section of the mounting plate, and the polishing sheet is located on the left side of the third rotating motor.

8. The optical lens polishing machine according to claim 7, wherein an adjusting plate is slidably connected to an upper side of the mounting plate, the first rotating motor is fixed to the adjusting plate, a toothed plate is fixedly arranged at a top of the adjusting plate, the toothed plate is engaged with an adjusting gear, and the adjusting gear is fixed to an output shaft of the third rotating motor.