Robot comprehensive practical training platform positioner

Abstract

The invention discloses a robot comprehensive practical training platform positioner which comprises a rectangular bottom plate, a side plate is fixedly connected between two supporting plates on the bottom plate, a servo motor is fixed to the inner wall of the second supporting plate, a rotating disc is coaxially fixed to an output shaft of the servo motor, and a supporting platform is fixed to the rotating disc. A polishing platform is supported above the supporting platform through supporting rods, two first air cylinders are arranged below the supporting platform, clamping plates used for clamping workpieces are fixed to the ends of telescopic rods of the two first air cylinders, a second air cylinder is fixed above the supporting platform, a first]-shaped clamping block is fixed to a telescopic rod of the second air cylinder, and a third air cylinder is fixed to the bottom of the supporting platform. The bottom end of a cylinder body of the third air cylinder is connected with a second J-shaped clamping block through a special-shaped block, the second air cylinder and the third air cylinder are operated, the first clamping block and the second clamping block are used for clamping a workpiece arranged on the bottom face of the supporting platform, and through the design of the double-face tool clamp, two different working modes can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical teaching, and more specifically, to a robot comprehensive training platform positioner. Background Art

[0002] The positioner used in the robot comprehensive training platform is generally a special welding auxiliary equipment, suitable for welding position displacement of rotary work to obtain the ideal processing position and welding speed. It can be used in conjunction with the manipulator and welding machine to form an automatic welding center, and can also be used for workpiece displacement during manual operation. The worktable rotation adopts stepless speed regulation of the inverter with high speed regulation accuracy. The remote control box can realize remote operation of the worktable, and can also be connected with the manipulator and welding machine control system to realize linkage operation.

[0003] The existing positioner can only realize the single fixation and rotation of the workpiece to be used together with the operating machine and the welding machine. The function is relatively single and cannot meet the various processing requirements of workpieces of different specifications.

[0004] Therefore, in order to solve the above problems, it is necessary to propose a robot comprehensive training platform positioner. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to propose a robot comprehensive training platform positioner. Through the design of a double-sided tooling fixture, two different working modes can be realized. One side can be used to fix the workpiece that needs to be polished, and the other side can be used to fix the workpiece for welding and gluing.

[0006] To achieve the above object, the present invention provides the following technical solutions: A robot comprehensive training platform positioner, comprising a rectangular bottom plate, wherein two vertical support plates 1 and 2 are arranged in parallel along the length direction at one end of the bottom plate, the two support plates are parallel to the width edge line of the bottom plate, a cover plate is installed at the top of the two support plates, and the positions between the two support plates on both sides are connected and fixed with side plates, a servo motor is fixed on the inner wall of the support plate 2, and a servo motor fixing plate is arranged on the outer wall thereof, the servo motor fixing plate is fixed to the servo motor inside the support plate 2 by bolts, the output shaft of the servo motor passes through the support plate 2 and the servo motor fixing plate is coaxially fixed with a rotating disk, the rotating disk is fixed with a "├"-shaped link plate by bolts, and the cross plate of the link plate is fixed with a supporting platform by bolts; A grinding platform is supported by four support rods distributed in a matrix at the middle position above the support platform, and two cylinders with telescopic rods facing inward are symmetrically arranged between the support rods and below the grinding platform, and a through slot corresponding to the displacement direction of the telescopic rod of the cylinder is opened on the grinding platform, and clamping plates for clamping workpieces are fixed at the ends of the two telescopic rods of the cylinder, and the clamping plates extend upward and pass through the through slot; A cylinder 2 is fixed on the side above the support platform away from the servo motor, the movement direction of the telescopic rod of the cylinder 2 is parallel to the length direction of the bottom plate, the outer end of the telescopic rod of the cylinder 2 extends to the outside of the support platform and is fixed with a "]"-shaped clamping block 1, and a cylinder 3 is fixed on the end of the bottom of the support platform away from the cylinder 2, the bottom end of the cylinder body of the cylinder 3 is fixed to the bottom surface of the support platform, and the outer end of the telescopic rod is fixed with a special-shaped block facing the clamping block 1, and the special-shaped block is fixedly connected with a "┘"-shaped clamping block 2 by bolts, and the cylinder 2 and the cylinder 3 are operated, and the clamping block 1 and the clamping block 2 are used to clamp the workpiece placed on the bottom surface of the support platform; A protective cover is fixed on one end of the bottom plate away from the support plate through a connecting block, an air supply pressure regulating valve connected to three cylinders is installed on the side plate of the protective cover, and a servo driver connected to the servo motor is arranged on the bottom plate.

[0007] The present invention is further configured as follows: a clamping groove is provided on the two opposite side walls of the two clamps, the upper part of the clamping groove leads to the outside of the clamp, a matching clamping block is inserted in the clamping groove, vertical slide rail grooves are provided on the two inner side walls of the clamping groove, sliders are provided on the two side walls of the clamping block, the sliders are slidably installed in the corresponding slide rail grooves, a pressure block matching the clamping surface of the workpiece is fixed on the outer wall of the clamping block, and a limiting mechanism is provided between the two clamps and the clamping blocks.

[0008] The present invention is further configured as follows: the limiting mechanisms respectively include mounting grooves provided on the outer wall of the splint, a through hole is provided at the bottom of the mounting groove, a retaining ring is installed at the opening, a sliding rod is passed through the mounting groove, the outer end of the sliding rod passes through the retaining ring and is installed with a pull plate, the inner end of the sliding rod passes through the through hole and is provided with limiting teeth arranged obliquely downward, a baffle is provided on the sliding rod at a position on one side of the bottom of the mounting groove, a spring is provided on the sliding rod between the baffle and the retaining ring, a limiting tooth groove matching the limiting tooth is provided on the inner wall of the clamping block corresponding to the limiting tooth, and when the clamping block is inserted into the clamping groove, the limiting tooth is clamped in the limiting tooth groove under the action of the spring.

[0009] The present invention is further configured as follows: a clamping assembly for clamping both sides of a workpiece is arranged at a position below the second cylinder at the bottom of the support platform, the clamping assembly includes a guide groove opened at the bottom of the support platform and parallel to the width direction of the base plate, a motor is installed at a position corresponding to the guide groove on the side wall of the support platform, the output shaft of the motor horizontally passes through the support platform and extends into the guide groove and is coaxially fixed with a bidirectional screw, threaded sleeves are sleeved at positions corresponding to the two sets of threads on the bidirectional screw, the two threaded sleeves are matched and installed in the guide groove, and two "┕"-shaped clamping plates that are buckled inwardly relative to each other are installed on the outer wall.

[0010] The present invention is further configured as follows: the three cylinders are all one-way cylinders.

[0011] The present invention is further configured as follows: a positioner signal terminal block is provided on the bottom plate, the positioner signal terminal block is connected to cylinder one, cylinder two, and cylinder three for signal transmission, and the positioner signal terminal block is connected to the servo motor for signal transmission.

[0012] The present invention is further configured as follows: a material box is mounted on the upper surface of the cover plate via a V-shaped positioning block.

[0013] The present invention is further configured as follows: an inductive switch sensor is arranged on the outer wall of the second support plate directly below the servo motor fixing plate, and a positioner zero point calibration component is arranged on the circumferential wall of the rotating disk; when the support platform is in a horizontal state, the positioner zero point calibration component corresponds to the inductive switch sensor.

[0014] In summary, the present invention has the following beneficial effects: The servo motor drives the rotating disk to drive the support platform to rotate, so as to realize the welding displacement of the positioner. A grinding platform is arranged on the support platform, and two relative cylinders 1 are arranged under the grinding platform, so that their telescopic rods are connected to the clamping plate for clamping the workpiece to be polished, so as to realize the clamping of the workpiece to be polished. Cylinder 2 is fixed on the side of the support platform away from the servo motor, so that the outer end of the telescopic rod of cylinder 2 extends to the outside of the support platform and fixes the "]"-shaped clamping block 1, and cylinder 3 is fixed on the end of the bottom of the support platform away from cylinder 2, so that the outer end of the telescopic rod is fixed to the special-shaped block facing the clamping block 1, and the special-shaped block is fixedly connected to the "┘"-shaped clamping block 2 by bolts, and the workpiece to be welded is placed on the bottom surface of the support platform, and cylinders 2 and 3 are operated to clamp the workpiece. The above can realize two different forms of working methods; By opening a clamping groove on the two opposite side walls of the two clamping plates, inserting a clamping block in the clamping groove, and fixing a pressing block matching the clamping surface of the workpiece on the outer wall of the clamping block, the clamping block with a pressing block of different shapes can be replaced according to the shape of the clamping surface of the workpiece to be polished; By setting a limiting mechanism between the two clamping plates and the clamping block, the corresponding clamping block is inserted into the clamping groove. Under the action of the spring, the limiting tooth is clamped in the limiting tooth groove to limit the clamping block. When the clamping block needs to be replaced, the pull plate needs to be pulled to separate the limiting tooth from the limiting tooth groove. By setting the clamping assembly, the workpiece to be welded can be clamped and further fixed. When the workpiece needs to be clamped or released, it is only necessary to operate the motor to make the two threaded sleeves move toward each other. By selecting a one-way cylinder, a single air pipe can be used to control the cylinder, thus preventing the workbench from being entangled and damaged due to too many air pipes. By setting an inductive switch sensor on the outer wall of the second support plate just below the servo motor fixing plate, and setting a positioner zero point calibration piece on the circumferential wall of the rotating disk, when the support platform is in a horizontal state, the positioner zero point calibration piece is close to the inductive switch sensor, so that the inductive switch sensor sends a signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structural schematic diagram of the present invention; Figure 3 A top view of the clamping connection between the clamping plate and the clamping block; Figure 4 It is a structural cross-sectional view of the limiting mechanism; Figure 5 It is a schematic diagram of the structure of the clamping assembly at the bottom of the support platform.

[0016] Figure numerals: 1, bottom plate; 2, support plate 1; 3, support plate 2; 4, cover plate; 5, side plate; 6, servo motor fixing plate; 7, rotating disk; 8, link plate; 9, support platform; 10, grinding platform; 11, cylinder 1; 12, through groove; 13, clamping plate; 14, cylinder 2; 15, clamping block 1; 16, cylinder 3; 17, special-shaped block; 18, clamping block 2; 19, protective cover; 20, air supply pressure regulating valve; 21, servo driver; 22, clamping groove; 23, clamping block; 24, slide rail groove; 25, slider; 26, Pressure block; 27. Mounting groove; 28. Through hole; 29. ​​Retaining ring; 30. Spring; 31. Limiting tooth groove; 32. Limiting tooth; 33. Pull plate; 34. Motor; 35. Bidirectional screw; 36. Threaded sleeve; 37. Guide groove; 38. Snap-on plate; 39. Positioner signal terminal block; 40. V-shaped positioning block; 41. Material box; 42. Inductive switch sensor; 43. Positioner zero point calibration; 44. Sliding rod; 45. Baffle. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings.

[0018] Embodiment: A robot comprehensive training platform positioner can realize two different working modes through the design of double-sided fixtures. One side can be used to fix the workpiece that needs to be polished, and the other side can be used to fix the workpiece for welding and gluing.

[0019] refer to Figure 1 , Figure 2 , including a rectangular bottom plate 1, two vertical support plates 2 and 3 are arranged parallel to each other along the length direction of the bottom plate 1 at one end, the two support plates are parallel to the width edge line of the bottom plate 1, a cover plate 4 is installed on the top of the two support plates, and the positions on both sides of the two support plates are connected and fixed with side plates 5, a servo motor is fixed on the inner wall of the support plate 2 3, and a servo motor fixing plate 6 is arranged on the outer wall thereof, and the servo motor fixing plate 6 is fixed to the servo motor inside the support plate 2 3 by bolts, and the output shaft of the servo motor A rotating disk 7 is coaxially fixed through the support plate 2 3 and the servo motor fixing plate 6, and a "├"-shaped link plate 8 is fixed to the rotating disk 7 by bolts. A support platform 9 is fixed to the cross plate of the link plate 8 by bolts. A grinding platform 10 is supported by four support rods distributed in a matrix at the middle position above the support platform 9. Two cylinders 11 with telescopic rods facing inward are symmetrically arranged between the support rods and below the grinding platform 10. A through slot 12 corresponding to the displacement direction of the telescopic rod of the cylinder 11 is opened on the grinding platform 10. The two cylinders 11 extend inward and the two cylinders 11 extend inward. A clamping plate 13 for clamping the workpiece is fixed at the end of the retractable rod, and the clamping plate 13 extends upward and passes through the through slot 12. A cylinder 2 14 is fixed on the side of the support platform 9 away from the servo motor. The movement direction of the telescopic rod of the cylinder 2 14 is parallel to the length direction of the bottom plate 1. The outer end of the telescopic rod of the cylinder 2 14 extends to the outside of the support platform 9 and is fixed with a "]"-shaped block 15. A cylinder 3 16 is fixed at the end of the bottom of the support platform 9 away from the cylinder 2 14. The bottom end of the cylinder body of the cylinder 3 16 is fixed to the bottom surface of the support platform 9. The outer end of the telescopic rod is fixed with a special-shaped block 17 facing the block 15, and the special-shaped block 17 is fixedly connected with the "┘"-shaped block 2 18 by bolts, and the cylinder 2 14 and the cylinder 3 16 are operated. The block 15 and the block 2 18 are used to clamp the side and bottom of the workpiece placed on the bottom surface of the support platform 9. A protective cover 19 is fixed on the end of the bottom plate 1 away from the support plate 1 2 through a connecting block. An air supply pressure regulating valve 20 connected to three cylinders is installed on the side plate 5 of the protective cover 19, and a servo driver 21 connected to the servo motor is arranged on the bottom plate 1. The servo motor drives the rotating disk 7 and then drives the support platform 9 to rotate, realizing the welding displacement of the positioner.

[0020] A grinding platform 10 is arranged on the supporting platform 9, and two relative cylinders 11 are arranged below the grinding platform 10, so that their telescopic rods are connected to a clamping plate 13 for clamping the workpiece to be polished, so as to realize the clamping of the workpiece to be polished, and cylinder 2 14 is fixed on the side of the supporting platform 9 away from the servo motor, so that the outer end of the telescopic rod of cylinder 2 14 extends to the outside of the supporting platform 9 and a "]"-shaped clamping block 15 is fixed, and cylinder 3 16 is fixed on the end of the bottom of the supporting platform 9 away from cylinder 2 14, so that the outer end of the telescopic rod is fixed to a special-shaped block 17 facing toward the clamping block 15, and the special-shaped block 17 is fixedly connected to the "┘"-shaped clamping block 2 18 by bolts, and the workpiece to be welded is placed on the bottom surface of the supporting platform 9, and cylinder 2 14 and cylinder 3 16 are operated to clamp the workpiece, and the above can realize two different forms of working modes.

[0021] Combination Figure 3 , Figure 4 , the two opposite side walls of the two clamping plates 13 are provided with a clamping groove 22, the upper part of the clamping groove 22 leads to the outside of the clamping plate 13, and a matching clamping block 23 is inserted in the clamping groove 22, and vertical slide rail grooves 24 are provided on the two inner side walls of the clamping groove 22, and sliders 25 are provided on the two side walls of the clamping block 23. The sliders 25 are slidably installed in the corresponding slide rail grooves 24, and a pressing block 26 matching the clamping surface of the workpiece is fixed on the outer wall of the clamping block 23, and a limiting mechanism is provided between the two clamping plates 13 and the clamping block 23. The limiting mechanisms include a mounting groove 27 provided on the outer wall of the clamping plate 13, a through hole 28 provided at the bottom of the mounting groove 27, a retaining ring 29 provided at the opening thereof, a sliding rod 44 passing through the mounting groove 27, the outer end of the sliding rod 44 passes through the retaining ring 29 and is provided with a pull plate 33, and the inner end thereof passes through the through hole 28 and is provided with a limiting tooth 32 which is arranged obliquely downward, a baffle 45 is provided on the sliding rod 44 at a position on one side of the bottom of the mounting groove 27, a spring 30 is sleeved between the baffle 45 and the retaining ring 29 on the sliding rod 44, a limiting tooth groove 31 matching the limiting tooth 32 is provided on the inner wall corresponding to the clamping block 23 and the limiting tooth 32, and when the clamping block 23 is inserted into the clamping groove 22, under the action of the spring 30, the limiting tooth 32 is clamped into the limiting tooth groove 31.

[0022] A clamping groove 22 is provided on the two opposite side walls of the two clamping plates 13, a clamping block 23 is inserted into the clamping groove 22, and a pressure block 26 matching the clamping surface of the workpiece is fixed on the outer wall of the clamping block 23. The clamping block 23 with pressure blocks 26 of different shapes can be replaced according to the shape of the clamping surface of the workpiece to be polished. By setting a limiting mechanism between the two clamping plates 13 and the clamping block 23, the corresponding clamping block 23 is inserted into the clamping groove 22. Under the action of the spring 30, the limiting tooth 32 is clamped in the limiting tooth groove 31 to limit the clamping block 23. When the clamping block 23 needs to be replaced, the pull plate 33 needs to be pulled to separate the limiting tooth 32 from the limiting tooth groove 31.

[0023] refer to Figure 5 A clamping assembly for clamping both sides of the workpiece is provided at the bottom of the support platform 9 below the cylinder 2 14. The clamping assembly includes a guide groove 37 provided at the bottom of the support platform 9 and parallel to the width direction of the base plate 1. A motor 34 is installed at the position corresponding to the guide groove 37 on the side wall of the support platform 9. The output shaft of the motor 34 horizontally passes through the support platform 9 and extends into the guide groove 37 and is coaxially fixed with a bidirectional screw 35. Threaded sleeves 36 are sleeved at the positions corresponding to the two sets of threads on the bidirectional screw 35. The two threaded sleeves 36 are matched and installed in the guide groove 37, and two "┕"-shaped clamping plates 38 that buckle inwardly are installed on the outer walls. When it is necessary to clamp or release the workpiece, it is only necessary to operate the motor 34 so that the two threaded sleeves 36 move toward each other, so as to achieve the clamping and further fixation of the workpiece to be welded, so as to ensure the accuracy of subsequent welding and gluing.

[0024] Combination Figure 1 All three cylinders are one-way cylinders, which can realize single air pipe control of the cylinder, so as to avoid too many air pipes causing the worktable to be entangled and the workpiece to fall. A terminal block 39 for arranging positioner signals is provided on the bottom plate 1, and the positioner signal terminal block 39 is connected to the cylinder 1 11, the cylinder 2 14, and the cylinder 3 16 for signal transmission, and the positioner signal terminal block 39 is connected to the servo motor for signal transmission. A material box 41 is installed on the upper surface of the cover plate 4 through a V-shaped positioning block 40.

[0025] refer to Figure 2 On the outer wall of the support plate 2 3, an inductive switch sensor 42 is arranged just below the servo motor fixing plate 6, and on the circumferential wall of the rotating disk 7, a positioner zero point calibration member 43 is arranged. When the support platform 9 is in a horizontal state, the positioner zero point calibration member 43 corresponds to the inductive switch sensor 42. When the support platform 9 is in a horizontal state, the positioner zero point calibration member 43 corresponds to the inductive switch sensor 42 and approaches, so that the inductive switch sensor 42 sends a signal.

[0026] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A robot comprehensive training platform positioner, characterized in that: It comprises a rectangular bottom plate, on one end of which two vertical support plates 1 and 2 are arranged in parallel along the length direction thereof, the two support plates are parallel to the width edge lines of the bottom plate, a cover plate is installed at the top ends of the two support plates, and side plates are connected and fixed at positions on both sides between the two support plates, a servo motor is fixed on the inner wall of the support plate 2, and a servo motor fixing plate is arranged on the outer wall thereof, the servo motor fixing plate is fixed to the servo motor on the inner side of the support plate 2 by bolts, the output shaft of the servo motor passes through the support plate 2 and the servo motor fixing plate is coaxially fixed with a rotating disk, the rotating disk is fixed with a "├"-shaped link plate by bolts, and the horizontal plate of the link plate is fixed with a supporting platform by bolts; A grinding platform is supported by four support rods distributed in a matrix at the middle position above the support platform, and two cylinders with telescopic rods facing inward are symmetrically arranged between the support rods and below the grinding platform, and a through slot corresponding to the displacement direction of the telescopic rod of the cylinder is opened on the grinding platform, and clamping plates for clamping workpieces are fixed at the ends of the two telescopic rods of the cylinder, and the clamping plates extend upward and pass through the through slot; A cylinder 2 is fixed on the side above the support platform away from the servo motor, the movement direction of the telescopic rod of the cylinder 2 is parallel to the length direction of the bottom plate, the outer end of the telescopic rod of the cylinder 2 extends to the outside of the support platform and is fixed with a "]"-shaped clamping block 1, and a cylinder 3 is fixed at the end of the bottom of the support platform away from the cylinder 2, the bottom end of the cylinder body of the cylinder 3 is fixed to the bottom surface of the support platform, and the outer end of the telescopic rod is fixed with a special-shaped block facing the clamping block 1, and the special-shaped block is fixedly connected with a "┘"-shaped clamping block 2 by bolts, and the cylinder 2 and the cylinder 3 are operated, and the clamping block 1 and the clamping block 2 are used to clamp the workpiece placed on the bottom surface of the support platform; A protective cover is fixed on one end of the bottom plate away from the support plate through a connecting block, an air supply pressure regulating valve connected to three cylinders is installed on the side plate of the protective cover, and a servo driver connected to the servo motor is arranged on the bottom plate.

2. The robot comprehensive training platform positioner according to claim 1, characterized in that: The two opposite side walls of the two clamps are provided with clamping grooves, the top of the clamping groove leads to the outside of the clamp, a matching clamping block is inserted in the clamping groove, vertical slide rail grooves are provided on the two inner side walls of the clamping groove, sliders are provided on the two side walls of the clamping block, the sliders are slidably installed in the corresponding slide rail grooves, a pressure block matching the clamping surface of the workpiece is fixed on the outer wall of the clamping block, and a limiting mechanism is provided between the two clamps and the clamping blocks.

3. The robot comprehensive training platform positioner according to claim 2, characterized in that: The limiting mechanisms respectively include mounting grooves provided on the outer wall of the splint, a through hole provided at the bottom of the mounting groove, a retaining ring provided at the opening thereof, a sliding rod passed through the mounting groove, the outer end of the sliding rod passes through the retaining ring and is provided with a pull plate, the inner end of the sliding rod passes through the through hole and is provided with limiting teeth arranged obliquely downward, a baffle is provided on the sliding rod at a position on one side of the bottom of the mounting groove, a spring is provided on the sliding rod between the baffle and the retaining ring, a limiting tooth groove matching the limiting tooth is provided on the inner wall of the clamping block corresponding to the limiting tooth, and when the clamping block is inserted into the clamping groove, the limiting tooth is clamped in the limiting tooth groove under the action of the spring.

4. The robot comprehensive training platform positioner according to claim 1, characterized in that: A clamping assembly for clamping both sides of the workpiece is provided at a position below the second cylinder at the bottom of the support platform, the clamping assembly includes a guide groove opened at the bottom of the support platform and parallel to the width direction of the base plate, a motor is installed at a position corresponding to the guide groove on the side wall of the support platform, the output shaft of the motor horizontally passes through the support platform and extends into the guide groove and is coaxially fixed with a bidirectional screw, threaded sleeves are sleeved at positions corresponding to the two sets of threads on the bidirectional screw, the two threaded sleeves are matched and installed in the guide groove, and two "┕"-shaped clamping plates that are buckled inwardly relative to each other are installed on the outer wall.

5. The robot comprehensive training platform positioner according to claim 1, characterized in that: The three cylinders are all one-way cylinders.

6. The robot comprehensive training platform positioner according to claim 1, characterized in that: A positioner signal terminal block is arranged on the bottom plate, and the positioner signal terminal block is connected with cylinder one, cylinder two and cylinder three for signal transmission, and the positioner signal terminal block is connected with the servo motor for signal transmission.

7. The robot comprehensive training platform positioner according to claim 1, characterized in that: A material box is installed on the upper surface of the cover plate through a V-shaped positioning block.

8. The robot comprehensive training platform positioner according to claim 1, characterized in that: An inductive switch sensor is arranged on the outer wall of the second support plate just below the servo motor fixing plate, and a positioner zero point calibration piece is arranged on the circumferential wall of the rotating disk. When the support platform is in a horizontal state, the positioner zero point calibration piece corresponds to the inductive switch sensor.

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