Rotary pneumatic claw

Abstract

The utility model discloses a rotary pneumatic claw which comprises a cylinder body, the cylinder body comprises a front end cover, a cylinder main body and a rear end cover, an air pipe connector is arranged on the outer surface of the cylinder body, a power input part is arranged at the rear end of the cylinder body and used for being connected with an external rotary power source, a rotating seat is arranged at the front end of the cylinder body, a transmission mechanism is arranged in the cylinder body, and the rotating seat is connected with a pneumatic claw assembly. A piston cavity is formed in the cylinder body, a piston is arranged in the piston cavity, a piston end cover is arranged at the open end of the piston cavity, the piston comprises a first round pipe and a second round pipe with the diameter smaller than that of the first round pipe, the second round pipe penetrates through a through hole formed in the piston end cover, the second round pipe is connected to one end of a piston rod in a sleeving mode, and the piston rod is in clearance fit with the second round pipe. The other end of the piston rod is inserted into the rotating seat and connected with the pneumatic gripper assembly. The piston rod and the piston are designed to be of a split structure, the piston does not rotate when the piston rod rotates, rotating abrasion of a piston sealing piece is reduced, the service life of a product is prolonged, and the use and maintenance cost of a user is reduced.

Description

Technical Field

[0001] The utility model relates to an air gripper, in particular to a rotary air gripper. Background Art

[0002] Rotary air grippers are used in the automation industry and are suitable for a wide range of applications, such as automated filling and capping machines, cosmetic canning equipment, and workpiece handling and flipping in non-standard automation equipment. Existing rotary air grippers often use pneumatic slip rings, which can lead to rapid wear of sealing components, a short service life, and poor durability. These grippers require irregular maintenance, which is time-consuming and labor-intensive, increasing costs and causing significant user frustration. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides a rotary air gripper.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a rotary air claw, comprising a cylinder body, the cylinder body comprising a front end cover, a cylinder main body, and a rear end cover, the outer surface of the cylinder body being provided with an air pipe interface, the rear end of the cylinder body being provided with a power input part, the power input part being used to connect an external rotary power source, the front end of the cylinder body being provided with a rotating seat, the cylinder body being provided with a transmission mechanism, the rotating seat being connected to the air claw assembly, the cylinder body being provided with a piston cavity open at one end and closed at the other end, the piston cavity being provided with a piston, the open end of the piston cavity being provided with a piston end cover, the piston comprising a first circular tube and a second circular tube with a diameter smaller than the first circular tube, the second circular tube passing through a through hole provided in the piston end cover, the second circular tube being sleeved on one end of a piston rod, and the piston rod and the second circular tube being clearance-matched, the other end of the piston rod being inserted into the rotating seat and connected to the air claw assembly, the piston sliding axially along the piston cavity and driving the air claw assembly to clamp or release through the piston rod, the power input part drives the rotating seat to rotate through the transmission mechanism, and the rotating seat drives the air claw assembly and the piston rod to rotate.

[0005] Both ends of the second circular tube are respectively provided with first bearings for supporting the piston rod.

[0006] The rear end of the second circular tube of the piston is provided with an opening and a piston rear cover for sealing the opening.

[0007] The transmission mechanism includes a first gear, a second gear meshed with the first gear, a transmission shaft connected to and transmitted by the second gear, a third gear connected to and transmitted by the transmission shaft, and a fourth gear meshed with the third gear. The first gear is arranged on the power input part, the fourth gear is sleeved on the piston rod, and the front end of the fourth gear is connected to the rotating seat.

[0008] The front and rear end faces of the cylinder body are fixedly connected to the front gear frame and the rear gear frame respectively. The cylinder body is provided with a through hole for the transmission shaft to pass through. The front gear frame and the rear gear frame are provided with mounting grooves for installing the second gear and the third gear, and a second bearing for supporting the transmission shaft.

[0009] The transmission mechanism includes at least two groups of second gears, a transmission shaft, and a third gear, and the second gears, the transmission shaft, and the third gears are equidistantly distributed around the circumference of the first gear axis.

[0010] The piston rod includes a first rod body and a second rod body with a smaller diameter than the first rod body. A shoulder is formed at the connection between the first rod body and the second rod body. The two ends of a first bearing are respectively abutted against the shoulder and the front end of the second round tube. One end face of the other first bearing is abutted against the end face of the second round tube. A threaded hole is provided at the end of the second rod body. A screw is connected to the threaded hole and abuts against the other end face of the other first bearing.

[0011] The beneficial effects of the utility model are as follows: the utility model designs the piston rod and the piston into a separate structure, so that the piston does not rotate when the piston rod rotates, reduces the rotational wear of the piston seal, increases the service life of the product, does not require frequent maintenance, and reduces the user's maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a rear view of the utility model;

[0014] Figure 3 for Figure 2 Cross-sectional view in the FF direction;

[0015] Figure 4 for Figure 2 Cross-sectional view in the EE direction;

[0016] Figure 5 It is an exploded schematic diagram of the present utility model.

[0017] In the figure: 100-cylinder body, 110-front end cover, 120-cylinder body, 130-rear end cover, 101-trachea interface, 102-piston chamber, 200-power input part, 201-keyway, 310-first gear, 320-second gear, 330-drive shaft, 340-third gear, 350-fourth gear, 400-air claw assembly, 510-piston, 511-first round tube, 512-second round tube, 520-piston end cover, 530-piston rod, 531-first rod body, 532-second rod body, 533-shaft shoulder, 540-first bearing, 550-piston rear cover, 560-elastic ring, 610-front gear frame, 620-rear gear frame, 601-mounting groove, 630-second bearing, 700-rotating seat. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 5 As shown, a rotary air gripper includes a cylinder body 100, the cylinder body 100 includes a front end cover 110, a cylinder body 120, and a rear end cover 130. The outer surface of the cylinder body 100 is provided with an air pipe interface 101, and the rear end of the cylinder body 100 is provided with a power input part 200, and the power input part 200 is used to connect to an external rotary power source. The front end of the cylinder body 100 is provided with a rotating seat 700, and a transmission mechanism is provided in the cylinder body 100. The rotating seat 700 is connected to the air gripper assembly 400. The cylinder body 100 is provided with a piston chamber 102 with one end open and the other end closed. The piston chamber 102 is provided with a piston 510, and the open end of the piston chamber 102 is provided with a piston end cover 520. The piston 510 includes a first circular tube 511 and a second circular tube 512 with a smaller diameter than the first circular tube 511. The second circular tube 512 passes through a through hole provided in the piston end cover 520. The second circular tube 512 is sleeved on one end of a piston rod 530, and the piston rod 530 and the second circular tube 512 are clearance-matched. The other end of the piston rod 530 is inserted into the rotating seat 700 and connected to the air claw assembly 400. The piston 510 slides axially along the piston cavity 102 and drives the air claw assembly 400 to clamp or loosen through the piston rod 530. The power input part 200 drives the rotating seat 700 to rotate through the transmission mechanism, and the rotating seat 700 drives the air claw assembly 400 and the piston rod 530 to rotate. In this embodiment, the air gripper assembly 400 has two claws, and its structure and the connection method of the piston rod 530 are both structures of the existing technology. Reference can be made to patents such as CN110621454B, CN102069461B, and CN204893974U. The air gripper assembly 400 can also adopt other two-claw, three-claw, four-claw and other structures of the existing technology; the power input part 200 is a shaft sleeve with a key groove 201 provided therein. The power input part 200 can also adopt a rotating shaft as needed.

[0019] A first bearing 540 supporting the piston rod 530 is provided at each end of the second circular tube 512. The piston rod 530 comprises a first rod body 531 and a second rod body 532 with a smaller diameter than the first rod body 531. A shoulder 533 is formed at the junction of the first rod body 531 and the second rod body 532. The ends of one first bearing 540 respectively abut the shoulder 533 and the front end of the second circular tube 512. One end face of the other first bearing 540 abuts the end face of the second circular tube 512. A threaded hole is provided at the end of the second rod body 532, through which a screw is connected and abuts the other end face of the other first bearing 540.

[0020] The rear end of the second circular tube 512 of the piston 510 is provided with an opening and a piston rear cover 550 that blocks the opening. In this embodiment, a groove is provided at the rear end of the second circular tube 512, and a circlip 560 is disposed within the groove. One end of the piston rear cover 550 abuts against a step within the second circular tube 512, and the other end abuts against the circlip 560.

[0021] Sealing rings are provided between the piston 510, the piston end cover 520 and the cylinder body 120, and between the piston end cover 520, the piston back cover 550 and the piston 510. Bearings are provided between the power input part 200, the rotating seat 700 and the cylinder body 100. The sealing structure and the bearings are conventional structures. Please refer to the attached drawings and will not be described in detail here.

[0022] The transmission mechanism includes a first gear 310, a second gear 320 meshing with the first gear 310, a transmission shaft 330 connected to and transmitting the power of the second gear 320, a third gear 340 connected to and transmitting the power of the transmission shaft 330, and a fourth gear 350 meshing with the third gear 340. The first gear 310 is arranged on the power input part 200, the fourth gear 350 is sleeved on the piston rod 530, and the front end of the fourth gear 350 is connected to the rotating base 700. The transmission chain is first gear 310-second gear 320-transmission shaft 330-third gear 340-fourth gear 350-rotating base 700. When the first gear 310 is small in size, the first gear 310 can be integrally processed and formed with the power input part 200. When the first gear 310 is large in size, the two can be processed separately and then assembled. The transmission mechanism includes at least two sets of second gears 320, transmission shafts 330, and third gears 340. These are equidistantly spaced about the axis of the first gear 310. The uniform distribution of multiple driven gears and transmission shafts 330 balances the radial forces acting on the heavily loaded active first gear 310, thereby increasing the service life of the gears and bearings. In this embodiment, three sets of second gears 320, transmission shafts 330, and third gears 340 are included.

[0023] The front and rear end surfaces of the cylinder body 120 are fixedly connected to the front gear frame 610 and the rear gear frame 620, respectively. The cylinder body 120 is provided with a through hole for the transmission shaft 330 to pass through. The front and rear gear frames 610 and 620 are provided with mounting grooves 601 for mounting the second gear 320 and the third gear 340, as well as a second bearing 630 for supporting the transmission shaft 330. In this embodiment, the second gear 320, the third gear 340, and the transmission shaft 330 are welded, but they can also be connected using a conventional structure such as a key transmission and a shaft end retaining ring.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, simple modifications and substitutions by those skilled in the art are within the scope of protection of the present invention.

Claims

1. A rotary air gripper, characterized in that: The cam is provided with a camming member which is adapted to move the cylinder to the vertical position relative to the cylinder head, and the camming member is provided with a plurality of camming members connected to the camming member so as to enable the cylinder head to move forward and to move the camming member to move forward.

2. A rotary air gripper according to claim 1, characterized in that: Both ends of the second circular tube are respectively provided with first bearings for supporting the piston rod.

3. A rotary air gripper according to claim 2, characterized in that: The rear end of the second circular tube of the piston is provided with an opening and a piston rear cover for sealing the opening.

4. A rotary air gripper according to claim 2, characterized in that: The transmission mechanism includes a first gear, a second gear meshed with the first gear, a transmission shaft connected to and transmitted by the second gear, a third gear connected to and transmitted by the transmission shaft, and a fourth gear meshed with the third gear. The first gear is arranged on the power input part, the fourth gear is sleeved on the piston rod, and the front end of the fourth gear is connected to the rotating seat.

5. A rotary air gripper according to claim 4, characterized in that: The front and rear end faces of the cylinder body are fixedly connected to the front gear frame and the rear gear frame respectively. The cylinder body is provided with a through hole for the transmission shaft to pass through. The front gear frame and the rear gear frame are provided with mounting grooves for installing the second gear and the third gear, and a second bearing for supporting the transmission shaft.

6. A rotary air gripper according to claim 5, characterized in that: The transmission mechanism includes at least two groups of second gears, a transmission shaft, and a third gear, and the second gears, the transmission shaft, and the third gears are equidistantly distributed around the circumference of the first gear axis.

7. A rotary air gripper according to claim 2, characterized in that: The piston rod includes a first rod body and a second rod body with a smaller diameter than the first rod body. A shoulder is formed at the connection between the first rod body and the second rod body. The two ends of a first bearing are respectively abutted against the shoulder and the front end of the second round tube. One end face of the other first bearing is abutted against the end face of the second round tube. A threaded hole is provided at the end of the second rod body. A screw is connected to the threaded hole and abuts against the other end face of the other first bearing.

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