Vacuum adsorption grabbing device for precision mechanical parts

Abstract

The application provides a vacuum adsorption grabbing device for precision mechanical parts, and relates to the technical field of mechanical grabbing, comprising: a grabbing hand frame fixedly installed at the hand end position of a mechanical arm; the grabbing hand frame is a frame structure penetrating left and right; a transmission frame is fixedly arranged at the bottom of the grabbing hand frame, and a transmission seat disc is fixedly arranged below the inside of the transmission frame; a suction cup connecting seat is integrally provided with a middle sliding cylinder at the top middle portion, and the middle sliding cylinder is slidingly arranged in the middle of the transmission seat disc; the bottom of the suction cup connecting seat is a flange structure, and a suction cup sliding seat is fixedly arranged at the bottom of the suction cup connecting seat; the device is provided with two kinds of adsorption structures of array type rubber suction cups and annular sealing rings, the extension and retraction of the rubber suction cups are realized through an internal control motor driving transmission mechanism, the unfolding and storage of the sealing rings are realized through an external control motor controlling a pneumatic telescopic rod, the problem that traditional fixed suction cups cannot adapt to different sizes of parts is solved, and the universality of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical gripping technology, and in particular to a vacuum adsorption gripping device for precision mechanical parts. Background Technology

[0002] The core principle of vacuum adsorption gripping devices is to generate negative pressure through a centrifugal pump or vacuum pump, so that the adsorption head (suction cup) is in close contact with the surface of the parts, and atmospheric pressure is used to firmly "suck" the workpiece, thereby achieving non-contact or low-contact gripping action, which is widely used in precision manufacturing.

[0003] The current gripping devices use fixed suction cups for adsorption, which makes it inconvenient to selectively grip parts based on their size, or to change to a more suitable gripping method for stable adsorption. They also lack the ability to change the form. Summary of the Invention

[0004] In view of the above, the present invention addresses the shortcomings of the prior art by providing a vacuum adsorption gripping device for precision mechanical parts.

[0005] This invention provides a vacuum adsorption gripping device for precision mechanical parts, specifically comprising: a gripping frame, which is fixedly installed at the hand end of a robotic arm; the gripping frame is a frame structure extending from left to right; a transmission frame is fixedly installed at the bottom of the gripping frame, and a transmission base plate is fixedly installed inside the lower part of the transmission frame; a suction cup connecting seat, wherein a central slide cylinder is integrally provided in the top center of the suction cup connecting seat, and the central slide cylinder is slidably disposed in the center of the transmission base plate; the bottom of the suction cup connecting seat is a flange structure, and a suction cup slide block is fixedly installed at the bottom of the suction cup connecting seat; an annular groove is formed on the bottom side of the suction cup slide block, and the suction cup... The bottom center of the slide has suction cup sliding holes; the adjacent surfaces of the suction cup connecting seat and the suction cup slide have annular grooves, and connecting air rings are fitted into the annular grooves; an air control device is fixedly installed on the outer side of the gripper frame and the transmission frame. The main body of the air control device is a frame structure. Two sets of main control telescopic rods are fixedly installed on both sides of the lower part of the air control device. The bottom of the main control telescopic rods is connected to the connecting air rings through pipes; a negative pressure device is fixedly installed in the middle of the gripper frame. The bottom of the negative pressure device and the bottom of the gripper frame both have through holes. A stainless steel corrugated pipe is installed below the through hole of the gripper frame and connected to the top of the middle slide cylinder.

[0006] Optionally, a bearing wheel is rotatably arranged around the top of the transmission base, and a transmission gear ring is rotatably arranged outside the bearing wheel; the inner and outer edges of the transmission gear ring are both flange structures, the top of the transmission gear ring is a conical gear ring structure, and the outer part of the transmission gear ring is a cylindrical gear ring; four sets of sliding frames are fixedly arranged at the bottom of the transmission base, and a synchronous lead screw is rotatably arranged in each sliding frame. The top of each synchronous lead screw passes through the transmission base and is fixedly arranged with a driven gear, which is in contact with the outer part of the transmission gear ring.

[0007] Optionally, a drive shaft is rotatably mounted on the top of the transmission base; an internal control motor is fixedly mounted on the outside of the transmission frame, and the rotor end of the internal control motor is connected to the drive shaft by a coupling; a bevel gear is mounted on the outside of the drive shaft and meshes with the top of the transmission gear ring.

[0008] Optionally, the top of the suction cup connector is fixedly provided with four sets of upper sliding frames, both of which are U-shaped structures. The upper and lower sliding frames are slidably connected, and the upper sliding frames are threadedly connected to the synchronous lead screw. The outer side of the middle sliding cylinder is integrally provided with four sets of circular flanges for guidance. The bottom of the suction cup connector is integrally arrayed with suction cup cylinders, each of which slides within a set of suction cup sliding holes. The bottom of the suction cup cylinder is integrally provided with a conical ring, and a rubber suction cup is fixedly provided inside the lower part of the conical ring. The diameter of the conical ring and the rubber suction cup is smaller than that of the suction cup sliding hole.

[0009] Optionally, six sets of pneumatic telescopic rods are fixedly installed at the bottom of the connecting air ring, and the pneumatic telescopic rods are connected to the main control telescopic rod; a sliding ring is fixedly installed at the telescopic end of the pneumatic telescopic rod, and a sealing ring is fixedly installed on the inner side and bottom of the sliding ring; the sliding ring and the sealing ring slide in contact with each other inside the annular groove.

[0010] Optionally, when the main control telescopic rod extends, the pneumatic telescopic rod retracts, and the sliding ring and sealing ring are housed inside the annular groove.

[0011] Optionally, a control screw is rotatably mounted inside the upper part of the gas control device, and control connecting plates are fixedly mounted on the telescopic ends of the two sets of main control telescopic rods. The control screw is threadedly connected to the control connecting plates. An external control motor is fixedly mounted on the top of the gas control device, and the external control motor is drivenly connected to the control screw.

[0012] Optionally, two sets of resistance strips are fixedly installed on one inner wall of the gas control device, and a connecting piece is provided on the side of the control connecting piece near the resistance strip. A spring rod is provided for sliding connection between the connecting piece and the control connecting piece, and the connecting piece is in contact with the resistance strip.

[0013] Optionally, the negative pressure device is integrally provided with an extension frame, and a centrifuge is rotatably arranged in the extension frame in conjunction with a bearing. A control frame is fixedly arranged on the side of the centrifuge near the negative pressure device, and a through hole is opened in the middle of the side of the centrifuge near the control frame. An air extraction motor is fixedly arranged outside the negative pressure device, and the shaft end of the air extraction motor is fixedly connected to the control frame.

[0014] The beneficial effects are as follows:

[0015] The device allows for flexible switching of gripping methods based on component size: it features two adsorption structures—an array of rubber suction cups and a ring-shaped sealing ring. An internal motor drives a transmission mechanism to extend and retract the rubber suction cups, while an external motor controls a pneumatic telescopic rod to unfold and retract the sealing ring. For small components, the rubber suction cups provide precise adsorption; for large or heavy components, the sealing ring is used for large-area adsorption, solving the problem that traditional fixed suction cups cannot adapt to components of different sizes and improving the device's versatility.

[0016] Strong adsorption stability and good adaptability: The rubber suction cup, combined with the conical ring structure, can maintain stability while ensuring adsorption force, avoiding shaking when gripping small parts; the sealing ring adopts a ring design and is equipped with a sealing structure, which increases the contact area with large parts and improves the reliability when gripping heavy workpieces. At the same time, the stainless steel bellows can flexibly deform with the movement of the suction cup connecting seat, ensuring that the negative pressure device can always stably pump air and maintain the adsorption effect.

[0017] Precise and efficient automated control: The automatic switching between the suction cup and the sealing ring is achieved through transmission components such as motor-driven lead screws and gears, making operation convenient; the cooperation between the resistance strip and the connecting plate in the air control device can monitor the status of the telescopic rod in real time, which facilitates precise control of the movement range of the adsorption structure; the negative pressure device uses a centrifuge to draw air, which can quickly generate a stable negative pressure, improving the efficiency of gripping and transferring, and meeting the high-efficiency gripping requirements of precision mechanical parts. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the gripping frame according to an embodiment of the present invention;

[0019] Figure 2 This diagram shows a side-view view of the gripping frame according to an embodiment of the present invention.

[0020] Figure 3 An embodiment of the present invention is shown. Figure 1 A schematic diagram of the three-dimensional disassembly structure;

[0021] Figure 4 An embodiment of the present invention is shown. Figure 2 A schematic diagram of the three-dimensional disassembly structure;

[0022] Figure 5 A schematic diagram of the assembly structure of the transmission base plate in an embodiment of the present invention is shown;

[0023] Figure 6 An embodiment of the present invention is shown. Figure 5 A schematic diagram of the structure viewed from the side;

[0024] Figure 7 A three-dimensional structural schematic diagram of the gas control device in an embodiment of the present invention is shown;

[0025] Figure 8 A disassembled structural diagram of the gas control device in an embodiment of the present invention is shown;

[0026] Figure 9 A three-dimensional cross-sectional view of the negative pressure device in an embodiment of the present invention is shown;

[0027] Figure 10 A schematic diagram of the working structure of an embodiment of the present invention is shown.

[0028] List of reference numerals in the attached diagram:

[0029] 1. Gripper frame; 2. Transmission frame; 201. Transmission base plate; 202. Bearing wheel; 203. Transmission gear ring; 204. Lower slide frame; 205. Synchronous lead screw; 206. Driven gear; 207. Drive shaft; 3. Suction cup connecting seat; 301. Upper slide frame; 302. Middle slide cylinder; 303. Suction cup cylinder; 304. Conical ring; 305. Rubber suction cup; 4. Internal control motor; 5. Suction cup slide base; 501. Annular groove; 502 6. Suction cup sliding hole; 6. Connecting air ring; 601. Pneumatic telescopic rod; 602. Sliding ring; 603. Sealing ring; 7. Air control device; 701. Main control telescopic rod; 702. Control connecting piece; 703. Control screw; 704. External control motor; 705. Resistance strip; 706. Connecting piece; 8. Negative pressure device; 801. Extension frame; 802. Centrifuge; 803. Control frame; 804. Suction motor; 9. Stainless steel corrugated pipe. Detailed Implementation

[0030] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0031] Example 1: Please refer to the accompanying drawings in the instruction manual. Figures 1 to 10 As shown:

[0032] This invention proposes a vacuum adsorption gripping device for precision mechanical parts, comprising: a gripping frame 1, which is fixedly installed at the hand end of a robotic arm; the gripping frame 1 is a frame structure extending from left to right; a transmission frame 2 is fixedly installed at the bottom of the gripping frame 1, and a transmission base plate 201 is fixedly installed inside the lower part of the transmission frame 2; a suction cup connecting seat 3, with an integrally formed intermediate slide cylinder 302 at the top center of the suction cup connecting seat 3, the intermediate slide cylinder 302 being slidably disposed in the center of the transmission base plate 201; the bottom of the suction cup connecting seat 3 is a flange structure, and a suction cup slide 5 is fixedly installed at the bottom of the suction cup connecting seat 3; an annular groove 501 is formed on the bottom side of the suction cup slide 5. The bottom center array has suction cup sliding holes 502; the adjacent surfaces of the suction cup connecting seat 3 and the suction cup sliding seat 5 are provided with annular grooves, and a connecting air ring 6 is provided in the annular groove; a control air device 7 is fixedly installed on the outer side of the gripper frame 1 and the transmission frame 2. The main body of the control air device 7 is a frame structure. Two sets of main control telescopic rods 701 are fixedly installed on both sides of the lower part of the control air device 7. The bottom of the main control telescopic rods 701 is provided with pipes connected to the connecting air ring 6; a negative pressure device 8 is fixedly installed in the middle of the gripper frame 1. The bottom of the negative pressure device 8 and the bottom of the gripper frame 1 are provided with through holes. A stainless steel corrugated pipe 9 is provided below the through hole of the gripper frame 1 and connected to the top of the middle sliding cylinder 302.

[0033] The transmission base plate 201 has a bearing wheel 202 rotatably mounted around its top, and a transmission gear ring 203 rotatably mounted around the bearing wheel 202. The inner and outer edges of the transmission gear ring 203 are both flange structures, the top of the transmission gear ring 203 is a conical gear ring structure, and the outer part of the transmission gear ring 203 is a cylindrical gear ring. Four sets of sliding frames 204 are fixedly mounted at the bottom of the transmission base plate 201. A synchronous screw 205 is rotatably mounted in each sliding frame 204. The top of each synchronous screw 205 passes through the transmission base plate 201 and is fixedly mounted with a driven gear 206. The driven gear 206 fits against the outer part of the transmission gear ring 203.

[0034] The drive shaft 207 is rotatably mounted on the top of the transmission base plate 201; an internal control motor 4 is fixedly mounted on the outside of the transmission frame 2, and the rotor end of the internal control motor 4 is connected to the drive shaft 207 by a coupling; a bevel gear is mounted on the outside of the drive shaft 207 and meshes with the top of the transmission gear ring 203.

[0035] The suction cup connector 3 has four sets of upper sliding frames 301 fixedly installed on its top. Both the upper sliding frame 301 and the lower sliding frame 204 are U-shaped structures. The upper sliding frame 301 and the lower sliding frame 204 are slidably connected. The upper sliding frame 301 is threadedly connected to the synchronous lead screw 205. The outer side of the middle sliding cylinder 302 is integrally provided with four sets of circular flanges for guidance. The bottom of the suction cup connector 3 is integrally arranged with suction cup cylinders 303, which slide within a set of suction cup sliding holes 502. The bottom of the suction cup cylinder 303 is integrally provided with a conical ring 304, and a rubber suction cup 305 is fixedly installed inside the lower part of the conical ring 304. The diameter of the conical ring 304 and the rubber suction cup 305 is smaller than that of the suction cup sliding hole 502.

[0036] Among them, six sets of pneumatic telescopic rods 601 are fixedly installed at the bottom of the connecting air ring 6, and the pneumatic telescopic rods 601 are connected to the main control telescopic rod 701; a sliding ring 602 is fixedly installed at the telescopic end of the pneumatic telescopic rod 601, and a sealing ring 603 is fixedly installed on the inner side and bottom of the sliding ring 602; the sliding ring 602 and the sealing ring 603 slide together inside the annular groove 501.

[0037] When the main control telescopic rod 701 extends, the pneumatic telescopic rod 601 retracts, and the sliding ring 602 and the sealing ring 603 are housed inside the annular groove 501.

[0038] The control screw 703 is rotatably mounted on the upper part of the gas control device 7. The telescopic ends of the two sets of main control telescopic rods 701 are fixedly mounted with control connecting plates 702. The control screw 703 is threadedly connected to the control connecting plates 702. An external control motor 704 is fixedly mounted on the top of the gas control device 7. The external control motor 704 is connected to the control screw 703 in a transmission manner.

[0039] Two sets of resistance strips 705 are fixedly installed on one inner wall of the gas control device 7. A connecting piece 706 is provided on the side of the control connecting piece 702 near the resistance strips 705. A spring rod is provided to slide between the connecting piece 706 and the control connecting piece 702. The connecting piece 706 is attached to the resistance strips 705.

[0040] The negative pressure device 8 is integrally provided with an extension frame 801. A centrifuge 802 is rotatably arranged inside the extension frame 801 in coordination with a bearing. A control frame 803 is fixedly arranged on the side of the centrifuge 802 near the negative pressure device 8. A through hole is opened in the middle of the side of the centrifuge 802 near the control frame 803. A vacuum motor 804 is fixedly arranged outside the negative pressure device 8. The shaft end of the vacuum motor 804 is fixedly connected to the control frame 803.

[0041] Grab smaller parts:

[0042] Start the internal control motor 4 to drive the drive shaft 207 to rotate; the drive shaft 207 drives the transmission gear ring 203 to rotate, and the transmission gear ring 203 further drives the driven gear 206 to rotate; the driven gear 206 drives the four sets of synchronous lead screws 205 to rotate synchronously, causing the upper slide frame 301 to descend, and then pushes the suction cup connecting seat 3 and related components downward, pushing the rubber suction cup 305 out of the suction cup sliding hole 502;

[0043] Rubber suction cup 305 is attached to the surface of the component. The vacuum motor 804 is started to drive the centrifuge 802 to rotate, continuously generating suction. The component is picked up by the rubber suction cup 305 through vacuum negative pressure for transfer. The conical ring 304 can maintain the stability of the rubber suction cup 305, and the stainless steel corrugated pipe 9 can automatically adapt to maintain the suction effect.

[0044] Example 2:

[0045] When grabbing larger and heavier parts, reverse the internal control motor 4 to retract the rubber suction cup 305 into the suction cup sliding hole 502;

[0046] The external control motor 704 is started to drive the control screw 703 to rotate. The control screw 703 drives the control connecting plate 702 to descend, squeezing the main control telescopic rod 701. The air in the main control telescopic rod 701 is input into the pneumatic telescopic rod 601, causing the pneumatic telescopic rod 601 to extend, thereby pushing out the sliding ring 602 and the sealing ring 603.

[0047] After attaching the sealing ring 603 to the component, perform the suction steps described above to perform adsorption and gripping. At this time, the sealing ring 603 acts as an integral suction cup, increasing the adsorption area and enabling stable gripping.

[0048] Example 3:

[0049] Generally, components have a larger surface area and a smaller surface area. The rubber suction cup 305 is used to grip the smaller surface area, and the sealing ring 603 is used to grip the larger surface area. Similarly, when assembling components of different sizes, the rubber suction cup 305 and the sealing ring 603 are used to grip them respectively. The number and distribution area of ​​the rubber suction cup 305 and the size of the sealing ring 603 are customized according to the size of the components.

[0050] It can also be upgraded to adapt to different parts. When the part size is too small and cannot fit multiple sets of rubber suction cups 305, air suction will cause the inability to create a vacuum. Therefore, a solenoid valve is installed inside the suction cup cylinder 303, or a sealing plug is manually used to block the non-working suction cup cylinder 303 to prevent it from sucking air and ensure the operation of other suction cup cylinders 303.

[0051] The specific usage and function of this embodiment: In this invention, the gripping action is performed by controlling the position of the gripping frame 1 with a robotic arm.

[0052] When smaller parts need to be grasped, a rubber suction cup 305 is used. The internal control motor 4 is started to drive the drive shaft 207 to rotate, the drive shaft 207 drives the transmission gear ring 203 to rotate, the transmission gear ring 203 drives the driven gear 206 to rotate, and the driven gear 206 drives the synchronous screw 205 to rotate. The four sets of synchronous screws 205 rotate synchronously, causing the upper sliding frame 301 to descend, pushing the suction cup connecting seat 3 and related components downward, pushing the rubber suction cup 305 out of the suction cup sliding hole 502, and then attaching the rubber suction cup 305 to the surface of the part for adsorption; the stainless steel corrugated pipe 9 automatically adapts to maintain the suction effect.

[0053] When the vacuum motor 804 is started, the centrifuge 802 is rotated, which continuously generates suction. The air inside the rubber suction cup 305 is discharged through the suction cup cylinder 303, the suction cup connecting seat 3, and the stainless steel corrugated pipe 9. The parts are picked up by the rubber suction cup 305 through the vacuum negative pressure and transferred. The conical ring 304 can maintain the stability of the rubber suction cup 305.

[0054] When adsorbing larger and heavier parts, the sealing ring 603 can be used for adsorption. The internal control motor 4 is reversed to retract the rubber suction cup 305 into the suction cup sliding hole 502. Then, the external control motor 704 is started to drive the control screw 703 to rotate. The control screw 703 drives the control connecting piece 702 to descend, squeezing the main control telescopic rod 701. Air in the main control telescopic rod 701 is input into the pneumatic telescopic rod 601, which extends the pneumatic telescopic rod 601. The pneumatic telescopic rod 601 pushes out the sliding ring 602 and the sealing ring 603. At this time, the sealing ring 603 is attached to the part and the air suction step is performed. After the sealing ring 603 is attached to the surface of the part, a closed cavity is formed. The suction force is generated by the negative pressure device 8, which can be used for adsorption and gripping. At this time, the sealing ring 603 acts as an integral suction cup, increasing the adsorption area and thus achieving stable gripping.

[0055] The resistance bar 705 is set to connect the control module to the control panel of the robotic arm. The circuit resistance is changed by the sliding of the connecting piece 706 outside the resistance bar 705, thereby reflecting the position of the control connecting piece 702 and monitoring the degree of expansion and contraction of the sealing ring 603.

[0056] After the grasping is completed, all components are reset and the robot is ready to go; the robotic arm is controlled by a preset control program.

Claims

1. A vacuum adsorption gripping device for precision mechanical parts, comprising: A gripper frame (1) is fixedly installed at the end of the robotic arm; the gripper frame (1) is a frame structure that runs through the left and right sides; characterized in that a transmission frame (2) is fixedly installed at the bottom of the gripper frame (1), and a transmission base plate (201) is fixedly installed inside the lower part of the transmission frame (2); a suction cup connecting seat (3) is provided with an integral middle slide cylinder (302) at the top center of the suction cup connecting seat (3), and the middle slide cylinder (302) is slidably installed in the middle of the transmission base plate (201); the bottom of the suction cup connecting seat (3) is a flange structure, and a suction cup slide (5) is fixedly installed at the bottom of the suction cup connecting seat (3); an annular groove (501) is opened on the bottom side of the suction cup slide (5), and the suction cup slide (5) The bottom center array of the gripper frame (1) has suction cup sliding holes (502); the adjacent surfaces of the suction cup connecting seat (3) and the suction cup sliding seat (5) are provided with annular grooves, and connecting air rings (6) are provided in the annular grooves; a control device (7) is fixedly provided on the outer side of the gripper frame (1) and the transmission frame (2). The main body of the control device (7) is a frame structure. Two sets of main control telescopic rods (701) are fixedly provided on both sides of the lower part of the control device (7). The bottom of the main control telescopic rods (701) is provided with pipes connected to the connecting air rings (6); a negative pressure device (8) is fixedly provided in the middle of the gripper frame (1). The bottom of the negative pressure device (8) and the bottom of the gripper frame (1) are provided with through holes. A stainless steel corrugated pipe is provided below the through holes of the gripper frame (1). (9) Connected to the top of the intermediate slide (302); a bearing wheel (202) is rotatably arranged around the top of the transmission base (201), and a transmission gear ring (203) is rotatably arranged outside the bearing wheel (202); the inner and outer edges of the transmission gear ring (203) are both flange structures, the top of the transmission gear ring (203) is a conical gear ring structure, and the outer side of the transmission gear ring (203) is a cylindrical gear ring; four sets of sliding frames (204) are fixedly arranged at the bottom of the transmission base (201), and a synchronous screw (205) is rotatably arranged in each sliding frame (204). The top of the synchronous screw (205) passes through the transmission base (201) and a driven gear (206) is fixedly arranged thereon. The driven gear (206) fits against the transmission gear ring (202). 03) The outside of the transmission base (201) is equipped with a drive shaft (207) rotating on the top; the transmission frame (2) is fixedly equipped with an internal control motor (4), and the rotor end of the internal control motor (4) is connected to the drive shaft (207) by a coupling; the drive shaft (207) is equipped with a bevel gear that meshes with the top of the transmission gear ring (203); the top of the suction cup connecting seat (3) is fixedly equipped with four sets of upper sliding frames (301), both the upper sliding frame (301) and the lower sliding frame (204) are U-shaped structures, the upper sliding frame (301) and the lower sliding frame (204) are slidably connected, and the upper sliding frame (301) is threadedly connected to the synchronous screw (205); the outside of the intermediate slide cylinder (302) is integrally equipped with four sets of circular flanges for guidance;The bottom of the suction cup connector (3) is integrally arrayed with suction cup cylinders (303), each of which slides within a set of suction cup sliding holes (502). The bottom of each suction cup cylinder (303) is integrally provided with a conical ring (304), and a rubber suction cup (305) is fixedly installed inside the lower part of the conical ring (304). The diameters of the conical ring (304) and the rubber suction cup (305) are smaller than the suction cup sliding holes (502).

2. The vacuum adsorption gripping device for precision mechanical parts as described in claim 1, characterized in that, The bottom of the connecting air ring (6) is fixedly provided with six sets of pneumatic telescopic rods (601), which are connected to the main control telescopic rod (701); the telescopic end of the pneumatic telescopic rod (601) is fixedly provided with a sliding ring (602), and the inner side and bottom of the sliding ring (602) are fixedly provided with a sealing ring (603); the sliding ring (602) and the sealing ring (603) slide together inside the annular groove (501).

3. The vacuum adsorption gripping device for precision mechanical parts as described in claim 2, characterized in that, When the main control telescopic rod (701) extends, the pneumatic telescopic rod (601) retracts, and the sliding ring (602) and the sealing ring (603) are housed inside the annular groove (501).

4. The vacuum adsorption gripping device for precision mechanical parts as described in claim 1, characterized in that, The upper part of the gas control device (7) is provided with a control screw (703) rotating inside. The telescopic ends of the two sets of main control telescopic rods (701) are fixedly provided with control connecting plates (702). The control screw (703) is threadedly connected to the control connecting plates (702). The top of the gas control device (7) is fixedly provided with an external control motor (704). The external control motor (704) is connected to the control screw (703) in a transmission connection.

5. The vacuum adsorption gripping device for precision mechanical parts as described in claim 4, characterized in that, Two sets of resistance strips (705) are fixedly installed on one side of the inner wall of the gas control device (7). A connecting piece (706) is provided on the side of the control connecting piece (702) near the resistance strip (705). A spring rod is provided between the connecting piece (706) and the control connecting piece (702) for sliding connection. The connecting piece (706) is attached to the resistance strip (705).

6. The vacuum adsorption gripping device for precision mechanical parts as described in claim 1, characterized in that, The negative pressure device (8) is integrally provided with an extension frame (801) on the outside. A centrifuge (802) is rotatably arranged in the extension frame (801) in coordination with the bearing. A control frame (803) is fixedly arranged on the side of the centrifuge (802) near the negative pressure device (8). A through hole is opened in the middle of the side of the centrifuge (802) near the control frame (803). A vacuum motor (804) is fixedly arranged on the outside of the negative pressure device (8). The shaft end of the vacuum motor (804) is fixedly connected to the control frame (803).

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