CN220288546U

CN220288546U - Free-form surface three-dimensional morphology light scanning measuring device

Info

Publication number: CN220288546U
Application number: CN202321780393.3U
Authority: CN
Inventors: 许航; 徐建; 陈炳洪
Original assignee: Chengdu Metering Detecting Test Institute
Current assignee: Chengdu Metering Detecting Test Institute
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2024-01-02
Anticipated expiration: 2033-07-07

Abstract

The utility model discloses a free-form surface three-dimensional morphology light scanning measurement device which comprises a position changing mechanism, a clamping mechanism, a rotary bearing platform, an adjusting mechanism, an optical measuring rod, a supporting frame and a control box. Firstly, the omnibearing measurement of the surface of a workpiece can be realized through the change of the position of the workpiece by a position changing mechanism, a rotary bearing platform and an adjusting mechanism; secondly, the clamping mechanism comprises a transmission device and an arc clamp, the transmission device comprises a limiting strip and pins arranged on the upper surface, the bottom surface of the arc clamp is correspondingly provided with pin holes, the arc clamp can be limited by the scheme, and the arc clamp can be conveniently disassembled, assembled and replaced so as to meet the measurement of workpiece parameters of curved surfaces with different radians; in addition, the optical measuring rod adopts the optical measuring head to carry out spectrum scanning measurement and carries out data transmission through the optical fiber, thereby being beneficial to improving the measurement precision and the measurement efficiency and simultaneously avoiding the defect that the traditional measuring head is easy to damage; finally, the upper computer is adopted for automatic continuous measurement, so that the measurement time is shortened.

Description

Free-form surface three-dimensional morphology light scanning measuring device

Technical Field

The utility model relates to the technical field of workpiece surface parameter measurement, in particular to a free-form surface three-dimensional morphology light scanning measurement device.

Background

In many engineering applications, the surface topography of a workpiece has a close relationship with the surface properties, which govern the performance of the surface in many engineering applications, and the surface topography has a great influence not only on the performance of the mating part, but also on the performance of many non-mating, non-contact parts. Such workpiece surface features include wear, sealing, mating, reflecting, coating, thermally conductive, electrically conductive, supporting, and the like.

The development of the workpiece surface measurement technology shows that the most common measuring instrument is a contact measuring instrument at present, has a good measuring range and measuring resolution, can comprehensively measure the shape error, the surface waviness and the surface roughness of the surface, and can meet the measurement requirements of most engineering surfaces. The nature of contact measurement determines that contact measurement instruments do not meet the measurement requirements of ultra-smooth surfaces for optical, semiconductor and certain soft metal material processing.

These drawbacks of contact measurement limit its application in ultra-precise surface measurement, and non-contact measurement methods are valued. Non-contact measurement methods can be largely divided into two categories: contour scanning measurements and interferometry. The interferometry method needs zero compensation and correction, and the main difficulty of the compensation method in checking the complex curved surface to be measured is that the compensation lens is designed and manufactured, and as the compensation devices corresponding to different workpieces to be measured are manufactured, the measurement efficiency is reduced, and the measurement cost of the instrument is also improved. In addition, when the curvature of the measured curved surface is relatively large, the measured wave surface has too large change slope and interference with the reference surface, so that the generated interference fringes are too dense to cause analysis difficulty, and the application range of the method is limited.

Therefore, a contour scanning measurement method typified by a spectrum scan has been widely used in recent years. However, the device for measuring the liquid still has the following defects through practice: 1. the traditional measuring instrument is fixedly matched with the measuring device, so that the measuring instrument cannot be suitable for occasions with large scale change amplitude of a workpiece, and in addition, the tip of the measuring instrument can be damaged in the long-time use process, and the measuring instrument cannot be replaced in time. 2. Because the free-form surface workpieces are different in shape and bending amplitude, the clamping tool in the prior art cannot be well suitable for workpieces with various curved surfaces, and the clamping effect is poor. 3. The traditional measuring instrument has low response speed and low measuring precision, and cannot be suitable for parameter acquisition with complex surface characteristics of a workpiece.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a free-form surface three-dimensional morphology optical scanning measuring device, which solves the problems that in the prior art, free-form surface workpieces are unreasonable to clamp, cannot be suitable for workpieces with different amplitudes, and cannot accurately acquire complex workpiece surface parameters.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the device comprises a multi-degree-of-freedom position changing mechanism, a workpiece clamping mechanism, a rotary bearing platform, an adjusting mechanism, a spectrum optical measuring rod, a supporting frame and a control box;

the support frame consists of a bottom plate and two vertical plates vertically arranged at two ends of the bottom plate, and the bottom plate is provided with a plurality of fixing holes; the position change mechanism comprises a vertical lifting mechanism, a horizontal moving mechanism and a 360-degree rotating motor, wherein two ends of the horizontal moving mechanism are respectively fixed at the top ends of two vertical plates, the vertical lifting mechanism is arranged on the horizontal moving mechanism, and the 360-degree rotating motor is arranged at the bottom end of the vertical lifting mechanism; the 360-degree rotating motor rotor is fixed with the adjusting mechanism, and the optical measuring rod is in rotary connection with the adjusting mechanism; the control box is fixed in the center of the upper surface of the bottom plate, and the rotary bearing platform is in rotary connection with the control box;

the clamping mechanism consists of a transmission device and two arc clamps placed in a mirror image mode, the transmission device is fixed on the rotary bearing platform, and the arc clamps are detachably connected with the transmission device.

Further, the optical measuring rod consists of an optical measuring head and a switching rod, the optical measuring head is detachably connected with the switching rod, and the switching rod is detachably connected with the adjusting mechanism.

Further, an optical fiber group for transmitting signals is arranged in the adapter rod, one end of the optical fiber group is connected with the optical measuring head, and the other end of the optical fiber group is connected with the data acquisition unit; the data interface of the data acquisition unit comprises an optical fiber, an Ethernet, a serial port and a digital-analog conversion module.

Further, the optical probe is a single-point optical probe or a linear array optical probe.

Further, the control box internally provided with a PLC controller which is respectively in communication connection with the upper computer, the data acquisition unit and the command execution mechanism.

Further, the adjusting mechanism is composed of an adjusting motor, a C-shaped fixing piece and a rotating handle, wherein the C-shaped fixing piece is fixed with a rotor of the 360-degree rotating motor, the adjusting motor is fixed on one side of the C-shaped fixing piece, the rotor penetrates through two sides of the C-shaped fixing piece, and the rotating handle is fixed in the middle of the inside of the C-shaped fixing piece.

Further, the rotary bearing platform comprises a rotary table and a rotary table motor, the rotary table motor is arranged in the center of the control box, and a rotor of the rotary table motor penetrates through the upper part of the control box and is fixed with the rotary table; four corners of the upper surface of the control box are respectively provided with four balls in an embedded mode, and a circle of annular sliding rail is arranged on the bottom surface of the turntable in a matched mode.

Further, the spout has been seted up to the revolving stage upper surface, and transmission includes centre gripping motor, reverse double-screw thread screw rod and two spacing, and centre gripping motor rotor is fixed with reverse double-screw thread screw rod one end, and reverse double-screw thread screw rod runs through two spacing, and both ends cup joint with spacing screw thread respectively, and spacing is located the spout.

Further, the upper surfaces at two ends of the limiting strip are respectively provided with two pins, and the bottom surface of the arc-shaped clamp is correspondingly provided with a pin hole.

Further, the horizontal moving mechanism comprises a second motor, a second screw rod, a limiting rod and a moving plate, wherein the second motor is fixed on the outer side of one of the vertical plates, a rotor of the second motor is fixedly connected with one end of the second screw rod, the limiting rod is fixed on the top ends of the two vertical plates and is parallel to the second screw rod, and the moving plate is respectively penetrated by the second screw rod and the limiting rod and is in threaded connection with the second screw rod; the vertical lifting mechanism comprises a first motor, a fixed cylinder, a first screw rod and a lifting cylinder; the center of the moving plate is provided with a through hole, the fixed cylinder is aligned with the through hole and fixed on the moving plate, the first motor is fixed at the top end of the fixed cylinder, the rotor of the first motor penetrates through the top end of the fixed cylinder and is fixedly connected with one end of a first screw rod, and the other end of the first screw rod is in threaded connection with the lifting cylinder; the top end of the lifting cylinder is provided with a limiting wing, and a vertical clamping groove is formed in the fixing cylinder in a matching manner; the 360-degree rotating motor is arranged at the bottom end of the lifting cylinder.

The utility model provides a free-form surface three-dimensional morphology light scanning measurement device. The beneficial effects are as follows:

1. according to the utility model, the optical measuring head is detachably connected with the switching rod, the switching rod is detachably connected with the adjusting mechanism, and the detachable connection mode comprises threaded connection or buckle connection. According to the technical scheme, the optical measuring head can be replaced in time under the condition that the optical measuring head is damaged, and in addition, when the shape difference of different areas of different workpieces or the same workpiece is relatively large, the accurate measurement of the surface parameters of the workpiece can be realized by replacing the transfer rod with different lengths in time.

2. The utility model discloses a detachable connection between an arc-shaped clamp and a transmission device. When facing the work piece of different radian curved surfaces, can adopt the arc anchor clamps that in time change and match with it to realize fine centre gripping to avoid the unstable measurement accuracy and the efficiency of influence of centre gripping.

3. In the utility model, the optical measuring rod consists of an optical measuring head and a switching rod, wherein an optical fiber group for transmitting signals is arranged in the switching rod, one end of the optical fiber group is connected with the optical measuring head, the other end of the optical fiber group is connected with a data acquisition unit, and the data acquisition unit comprises optical fibers, an Ethernet, a serial port, a digital-analog conversion module and the like. According to the technical scheme, the spectrum scanning and the optical fiber are utilized to transmit data, so that the sampling precision and the signal transmission speed are greatly improved.

4. According to the utility model, the surface of the free-form surface workpiece can be measured in an omnibearing manner without dead angles through the position change mechanism, the adjusting mechanism and the rotary bearing platform, and meanwhile, the whole measurement is automatically completed through the PLC, the upper computer, the data acquisition unit and various motor executing mechanisms, so that the measurement efficiency and precision are improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the vertical lift mechanism, 360 DEG rotating motor and adjusting mechanism structure of the present utility model;

FIG. 3 is a schematic view of the clamping mechanism and turret structure of the present utility model;

fig. 4 is a schematic diagram of the horizontal moving mechanism and the supporting frame structure of the present utility model.

In the figure: 1. a position changing mechanism; 11. a vertical lifting mechanism; 111. a first motor; 112. a fixed cylinder; 113. a first screw; 114. a lifting cylinder; 1141. limit wings; 12. a horizontal movement mechanism; 121. a second motor; 122. a second screw; 123. a limit rod; 124. a moving plate; 1241. a through hole; 13. a 360 DEG rotating electric machine; 2. a clamping mechanism; 21. a transmission device; 211. clamping the motor; 212. a reverse double-flighted screw; 213. a limit bar; 2131. a pin; 22. an arc-shaped clamp; 3. rotating the bearing platform; 31. a turntable; 311. a chute; 32. a turntable motor; 4. an adjusting mechanism; 41. adjusting a motor; 42. a "C" shaped fastener; 43. a rotating handle; 5. an optical measuring rod; 51. an optical probe; 52. a transfer rod; 6. a support frame; 61. a bottom plate; 611. a fixing hole; 62. a riser; 7. a control box; 71. and (3) rolling balls.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the embodiment of the present utility model provides a technical solution: a free-form surface three-dimensional morphology light scanning measurement device comprises a position changing mechanism 1, a free-form surface workpiece clamping mechanism 2, a 360-degree rotating bearing platform 3, an adjusting mechanism 4, a spectrum optical measuring rod 5, a supporting frame 6 and a control box 7.

The support frame 6 is composed of a bottom plate 61 and two vertical plates 62 vertically installed at both ends of the bottom plate 61, and the bottom plate 61 has a plurality of fixing holes 611, and the support frame 6 is fixed to the table by screws or bolts passing through the fixing holes 611. The riser 62 may be a transparent material or a square configuration to facilitate the multi-angle real-time viewing of the scan by personnel. The position change mechanism 1 comprises a vertical lifting mechanism 11, a horizontal moving mechanism 12 and a 360-degree rotating motor 13, wherein two ends of the horizontal moving mechanism 12 are respectively fixed at the top ends of two vertical plates 62, the vertical lifting mechanism 11 is arranged on the horizontal moving mechanism 12 and can freely and transversely move on the vertical lifting mechanism, and the 360-degree rotating motor 13 is arranged at the bottom end of the vertical lifting mechanism 11. The rotor of the 360-degree rotating motor 13 is fixed with the adjusting mechanism 4, the optical measuring rod 5 is rotationally connected with the adjusting mechanism 4, and the 360-degree rotating motor and the optical measuring rod 5 are vertically connected with the adjusting mechanism 4. The control box 7 is fixed in the center of the upper surface of the bottom plate 61, and the rotary bearing platform 3 is positioned above the control box 7 and is rotatably connected with the control box 7.

The clamping mechanism 2 consists of a transmission device 21 and two arc clamps 22 which are arranged in a mirror image way, wherein the transmission device 21 is fixed on the rotary bearing platform 3, and the arc clamps 22 are detachably connected with the transmission device 21.

Preferably, the optical measuring rod 5 is composed of an optical measuring head 51 and a switching rod 52, the optical measuring head 51 is detachably connected with the switching rod 52, and the switching rod 52 is detachably connected with the adjusting mechanism 4. The detachable connection mode can adopt threaded connection, buckle connection or other connection modes which are convenient to detach in time, so that the damaged optical measuring head 51 can be replaced in time, and the surface parameter measurement of free-form surface workpieces with different sizes or calibers can be met by replacing the transfer rods 52 with different lengths in time.

Further, an optical fiber group for transmitting signals is arranged in the switching rod 52, one end of the optical fiber group is connected with the optical measuring head 51, and the other end of the optical fiber group is connected with the data acquisition unit; the data acquisition unit comprises an optical fiber, an Ethernet, a serial port, a digital-analog conversion module and the like. Further, the optical probe 51 may be a non-contact optical probe such as a single-point optical probe or a linear optical probe. Further, the control box 7 internally provided with a PLC controller which is respectively in communication connection with the upper computer, the data acquisition unit and the command execution mechanism.

And in addition, the whole process intelligent control is carried out through the PLC, so that the measurement efficiency can be improved, and the defect that the measuring head is easy to damage can be avoided by adopting the non-contact optical measuring head.

Preferably, the adjusting mechanism 4 is composed of an adjusting motor 41, a C-shaped fixing member 42 with a lower opening and a rotating handle 43, wherein the C-shaped fixing member 42 is fixed with a rotor of the 360-degree rotating motor 13, the adjusting motor 41 is fixed on one side of the C-shaped fixing member 42, the rotor penetrates through two sides of the C-shaped fixing member 42, and the rotating handle 43 is fixed in the middle inside the C-shaped fixing member 42. The optical measuring rod 5 fixed on the rotating handle 43 is driven to rotate by the rotation of the adjusting motor 41, so that the measurement of all points on the surface of the curved surface workpiece in the same axial direction can be realized.

Preferably, the rotary bearing platform 3 comprises a rotary table 31 and a rotary table motor 32, the rotary table motor 32 is arranged in the center of the control box 7, and a rotor of the rotary table motor passes through the upper part of the control box 7 and is fixed with the rotary table 31; four balls 71 are respectively embedded in four corners of the upper surface of the control box 7, and a circle of annular sliding rail is arranged on the bottom surface of the turntable 31 in a matching manner. The cooperation of the balls 71 and the sliding rails can reduce the abrasion of the turntable 31 and the workpiece gravity to the control box 7 and the obstruction to the rotation of the turntable 31 during the rotation of the turntable 31.

Further, the upper surface of the turntable 31 is provided with a chute 311, the transmission device 21 comprises a clamping motor 211, a reverse double-threaded screw 212 and two limiting strips 213, the rotor of the clamping motor 211 is fixed with one end of the reverse double-threaded screw 212, the reverse double-threaded screw 212 penetrates through the two limiting strips 213, the two ends of the reverse double-threaded screw penetrate through the two limiting strips 213 in a threaded sleeve joint with the limiting strips 213 respectively, and the limiting strips 213 are located in the chute 311.

Further, two pins 2131 are respectively disposed on the upper surfaces of the two ends of the limiting bar 213, and pin holes are correspondingly formed on the bottom surface of the arc-shaped clamp 22. Through pin 2131 and pinhole matchable connection, both can carry out spacing removal to arc anchor clamps 22, can make things convenient for the dismouting to change again to can satisfy the work piece centre gripping of different radians or size well, with the measurement accuracy that promotes the centre gripping stability and bring.

Preferably, the horizontal moving mechanism 12 comprises a second motor 121, a second screw rod 122, a limiting rod 123 and a moving plate 124, wherein the second motor 121 is fixed on the outer side of one of the vertical plates 62, a rotor of the second motor is fixedly connected with one end of the second screw rod 122, the limiting rod 123 is fixed on the top ends of the two vertical plates 62 and is parallel to the second screw rod 122, and the moving plate 124 is respectively penetrated by the second screw rod 122 and the limiting rod 123 and is in threaded connection with the second screw rod 122; the vertical lifting mechanism 11 comprises a first motor 111, a fixed cylinder 112, a first screw 113 and a lifting cylinder 114; the center of the moving plate 124 is provided with a through hole 1241, the fixed cylinder 112 is aligned with the through hole 1241 and fixed on the moving plate 124, the first motor 111 is fixed at the top end of the fixed cylinder 112, the rotor penetrates through the top end of the fixed cylinder 112 and is fixedly connected with one end of the first screw 113, and the other end of the first screw 113 is in threaded connection with the lifting cylinder 114; the top end of the lifting cylinder 114 is provided with a limit wing 1141, and a vertical clamping groove is formed in the fixed cylinder 112 in a matching manner; the 360-degree rotating motor 13 is installed at the bottom end of the lifting cylinder 114. The optical measuring rod 5 can be moved through the horizontal moving mechanism 12 and the vertical lifting mechanism 11 to finish the measurement of the transverse position or the position points with different heights on the surface of the workpiece, and meanwhile, the relative horizontal axial position of the workpiece can be changed through 360-degree rotation of the bearing platform 3, so that the measurement of all the positions on the surface of the workpiece is realized.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The light scanning measuring device for the three-dimensional morphology of the free curved surface is characterized by comprising a multi-degree-of-freedom position-changing mechanism (1), a workpiece clamping mechanism (2), a rotary bearing platform (3), an adjusting mechanism (4), a spectrum optical measuring rod (5), a supporting frame (6) and a control box (7);

the support frame (6) is composed of a bottom plate (61) and two vertical plates (62) vertically arranged at two ends of the bottom plate (61), and the bottom plate (61) is provided with a plurality of fixing holes (611); the position change mechanism (1) comprises a vertical lifting mechanism (11), a horizontal moving mechanism (12) and a 360-degree rotating motor (13), wherein two ends of the horizontal moving mechanism (12) are respectively fixed at the top ends of two vertical plates (62), the vertical lifting mechanism (11) is arranged on the horizontal moving mechanism (12), and the 360-degree rotating motor (13) is arranged at the bottom end of the vertical lifting mechanism (11); a rotor of the 360-degree rotating motor (13) is fixed with the adjusting mechanism (4), and the optical measuring rod (5) is rotationally connected with the adjusting mechanism (4); the control box (7) is fixed in the center of the upper surface of the bottom plate (61), and the rotary bearing platform (3) is rotationally connected with the control box (7);

the clamping mechanism (2) consists of a transmission device (21) and two arc clamps (22) which are arranged in a mirror image way, wherein the transmission device (21) is fixed on the rotary bearing platform (3), and the arc clamps (22) are detachably connected with the transmission device (21).

2. The free-form surface three-dimensional morphology light scanning measurement device according to claim 1, wherein the optical measuring rod (5) is composed of an optical measuring head (51) and a switching rod (52), the optical measuring head (51) is detachably connected with the switching rod (52), and the switching rod (52) is detachably connected with the adjusting mechanism (4).

3. The free-form surface three-dimensional morphology light scanning measuring device according to claim 2, wherein an optical fiber group for transmitting signals is arranged in the switching rod (52), one end of the optical fiber group is connected with the optical measuring head (51), and the other end is connected with the data acquisition unit; the data interface of the data acquisition unit comprises an optical fiber, a serial port and a digital-analog conversion module.

4. A free-form surface three-dimensional topographical light scanning measuring device as claimed in claim 2 or 3, characterized in that the optical probe (51) is a single-point optical probe or a linear optical probe.

5. The free-form surface three-dimensional morphology light scanning measurement device according to claim 3, wherein a PLC controller is installed in the control box (7), and the PLC controller is respectively in communication connection with the upper computer, the data acquisition unit and the command execution mechanism.

6. The free-form surface three-dimensional morphology light scanning measuring device according to claim 1 or 2, wherein the adjusting mechanism (4) is composed of an adjusting motor (41), a 'C' -shaped fixing piece (42) and a rotating handle (43), the 'C' -shaped fixing piece (42) is fixed with a rotor of the 360-degree rotating motor (13), the adjusting motor (41) is fixed on one side of the 'C' -shaped fixing piece (42), the rotor penetrates through two sides of the 'C' -shaped fixing piece (42), and the rotating handle (43) is fixed in the middle inside the 'C' -shaped fixing piece (42).

7. The free-form surface three-dimensional morphology light scanning measuring device according to claim 1, wherein the rotary bearing platform (3) comprises a rotary table (31) and a rotary table motor (32), the rotary table motor (32) is arranged in the center of the control box (7), and a rotor of the rotary table motor (32) penetrates through the upper part of the control box (7) and is fixed with the rotary table (31); four corners of the upper surface of the control box (7) are respectively provided with four balls (71) in an embedded mode, and a circle of annular sliding rail is arranged on the bottom surface of the rotary table (31) in a matched mode.

8. The free-form surface three-dimensional morphology light scanning measurement device according to claim 7, wherein a chute (311) is formed in the upper surface of the turntable (31), the transmission device (21) comprises a clamping motor (211), a reverse double-threaded screw (212) and two limiting strips (213), the rotor of the clamping motor (211) is fixed with one end of the reverse double-threaded screw (212), the reverse double-threaded screw (212) penetrates through the two limiting strips (213), the two ends of the reverse double-threaded screw are respectively in threaded sleeve joint with the limiting strips (213), and the limiting strips (213) are located in the chute (311).

9. The free-form surface three-dimensional morphology light scanning measuring device according to claim 8, wherein two pins (2131) are respectively arranged on the upper surfaces of two ends of the limiting strip (213), and pin holes are correspondingly formed on the bottom surface of the arc-shaped clamp (22).

10. The free-form surface three-dimensional morphology light scanning measurement device according to claim 1, wherein the horizontal movement mechanism (12) comprises a second motor (121), a second screw rod (122), a limiting rod (123) and a moving plate (124), the second motor (121) is fixed on the outer side of one of the vertical plates (62), a rotor of the second motor is fixedly connected with one end of the second screw rod (122), the limiting rod (123) is fixed on the top ends of the two vertical plates (62) and is parallel to the second screw rod (122), and the moving plate (124) is respectively penetrated by the second screw rod (122) and the limiting rod (123) and is in threaded connection with the second screw rod (122); the vertical lifting mechanism (11) comprises a first motor (111), a fixed cylinder (112), a first screw (113) and a lifting cylinder (114);

the center of the movable plate (124) is provided with a through hole (1241), the fixed cylinder (112) is aligned with the through hole (1241) and fixed on the movable plate (124), the first motor (111) is fixed at the top end of the fixed cylinder (112), the rotor of the first motor penetrates through the top end of the fixed cylinder (112) and is fixedly connected with one end of a first screw rod (113), and the other end of the first screw rod (113) is in threaded connection with the lifting cylinder (114); the top end of the lifting cylinder (114) is provided with a limit wing (1141), and a vertical clamping groove is formed in the fixed cylinder (112) in a matching way; the 360-degree rotating motor (13) is arranged at the bottom end of the lifting cylinder (114).