CN210214054U

CN210214054U - Pneumatic gripping clamp

Info

Publication number: CN210214054U
Application number: CN201921259307.8U
Authority: CN
Inventors: Cheng Zhou; 周诚; Binbin Xie; 解斌斌; Zhicai Liu; 刘智财
Original assignee: WUXI HUATONG PNEUMATIC MANUFACTURE Co Ltd
Current assignee: WUXI HUATONG PNEUMATIC MANUFACTURE Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-03-31
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a pneumatic grabs and presss from both sides, its technical scheme main points are: comprises a gripper seat, a cylinder body is fixed on the top of the gripper seat, a piston is connected in the cylinder body in a sliding way along the vertical direction, a conical block is fixed at the bottom of the piston, the piston can drive the conical block to slide, a piston rod is installed and fixed in the cylinder body and the gripper seat together, an air passage is arranged in the piston rod, an air inlet which leads to the air passage in the piston rod is arranged on the gripper seat, the top of the piston is provided with a groove, the piston rod is provided with an air outlet which leads to the groove from the air passage, the bottom symmetry of toper piece articulates there are two first connecting rods, the inside symmetry of tongs seat articulates there are two second connecting rods, and pneumatic grabhook presss from both sides inner structure simple relatively, relies on the structure of this design, and the clamping jaw does not rely on the wobbling form, and stroke amplitude is very little, is applicable to some narrow occasions.

Description

Pneumatic gripping clamp

Technical Field

The utility model relates to a tongs, in particular to pneumatic tongs.

Background

The pneumatic gripper is a pneumatic clamping piece, also called a pneumatic finger, and is an actuating device which uses compressed air as power and is used for clamping or grabbing a workpiece. The method is widely used in automation enterprises.

The common parallel clamping jaw is driven by a single piston, an axle center drives a crank, two corresponding crank grooves are respectively arranged on two clamping jaws, and the clamping jaws and the body are connected into a steel ball sliding rail structure in order to reduce friction resistance; a piston rod of a common swing clamping jaw is provided with an annular groove, and because a finger trunnion is connected with the annular groove, fingers can move simultaneously and automatically center, and the constant grabbing torque is ensured; the common selection clamping jaw works according to the meshing principle of a rack, a piston is fixed with a shaft capable of moving up and down, three ring grooves are formed in the tail end of the shaft and are meshed with two driving wheels, and the gear rack principle ensures that the grabbing force is constant all the time; the piston of a common three-point clamping jaw is provided with an annular groove, each crank is connected with a pneumatic finger, and the motion of the piston can drive the three cranks to act, so that the three fingers can be controlled to be opened and closed simultaneously.

The traditional Chinese patent with the publication number of CN209158436U discloses a pneumatic clamping jaw, which comprises a base, wherein a cylinder is arranged on the base, the cylinder drives two floating jaws to mutually clamp through a slider-crank mechanism, or one floating jaw clamps with a fixed jaw arranged on the base, the slider-crank mechanism comprises a first connecting rod and a second connecting rod, the hinged part is provided with a first slider which slides left and right in a first guide rail, the first guide rail is connected with a piston rod of the cylinder and is driven by the piston rod, the second slider slides left and right in a second guide rail fixed on the base, and the floating jaw is fixed on the second slider.

The above-mentioned clamps, which are all capable of performing the function of a pneumatic gripper, have some drawbacks, such as: firstly, the internal structure is complex, and more transmission parts are adopted; secondly, automatic return of most clamping jaws is difficult to realize; and thirdly, most clamping jaws depend on a swinging mode, and the swinging mode has large amplitude, so that the clamping jaws are inconvenient to apply in certain narrow occasions.

SUMMERY OF THE UTILITY MODEL

To the problem mentioned in the background art, the utility model aims at providing a pneumatic gripper to solve the problem mentioned in the background art.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a pneumatic gripper comprises a gripper seat, wherein a cylinder body is fixed at the top of the gripper seat, a piston is connected in the cylinder body in a sliding manner along the vertical direction, a conical block is fixed at the bottom of the piston and can drive the conical block to slide, a piston rod is fixedly installed inside the cylinder body and the gripper seat together, an air passage is formed inside the piston rod, an air inlet leading to the air passage in the piston rod is formed in the gripper seat, a groove is formed in the top of the piston, an air outlet leading to the groove from the air passage is formed in the piston rod, two first connecting rods are symmetrically hinged to the bottom of the conical block, two second connecting rods are symmetrically hinged inside the gripper seat, kidney-shaped grooves are formed in the two ends of the two second connecting rods respectively, and first fixing columns which can be connected in the kidney-shaped grooves in a sliding manner are fixed at one end of each of the two first connecting rods respectively, two third connecting rods are symmetrically connected in the gripper seat in a sliding manner along the horizontal direction, the end parts of the two third connecting rods are respectively fixed with a second fixing column which can be connected in the kidney-shaped groove in a sliding manner, a return spring is further sleeved outside the piston rod, one end of the return spring is fixed outside the piston rod, and the other end of the return spring is fixed on the piston.

By adopting the technical scheme, when gas is discharged from the gas inlet on the gripper seat, the gas enters the gas passage in the piston rod from the gas inlet, and then enters the groove on the piston from the gas outlet at the upper part of the gas passage, so that the piston is pushed and the conical block is driven to vertically slide, the two first connecting rods are driven to swing, the third connecting rods are driven to horizontally swing by utilizing the traction of the second connecting rods, so that the two third connecting rods are driven to mutually approach, the clamping effect is realized, when the gas is stopped to be introduced into the gas inlet, the conical block is driven to return by the piston under the elastic force action of the return spring, so that the two third connecting rods are driven to open, and the clamping effect is relieved; the pneumatic gripper is relatively simple in internal structure, different from the conventional gripper structure, and does not adopt more transmission parts; compared with the traditional gripping clamp, the pneumatic gripping clamp can realize automatic return; and by means of the structure of the design, the clamping jaw does not depend on a swinging mode, the stroke amplitude is small, and the clamping jaw is suitable for certain narrow occasions.

Preferably, the piston is connected to the conical block by a plurality of bolts.

By adopting the technical scheme, the piston and the conical block can be conveniently connected and fixed by utilizing the bolt.

Preferably, an annular sealing ring is embedded and fixed on the annular wall of the piston.

Through adopting above-mentioned technical scheme, the leakproofness when the ring packing on the piston can increase the piston and slide.

Preferably, the bottom end of the piston rod is connected with a threaded ring in a threaded mode, and the threaded ring is installed on the gripper seat in a threaded mode.

Through adopting above-mentioned technical scheme, utilize the screw ring can conveniently be fixed the piston rod installation to the device in.

Preferably, two anti-skidding pressing blocks are fixed at one end of one of the third connecting rods, and a clamping piece is fixed at the other end of the third connecting rod.

Through adopting above-mentioned technical scheme, utilize the realization centre gripping that antiskid briquetting and clamping piece can be firm.

Preferably, the air passage completely penetrates through the piston rod, and the piston rod is provided with plugs at two ends of the air passage in a sealing manner.

Through adopting above-mentioned technical scheme, set up the characteristics that the air flue that runs through has convenient processing, utilize to block up and to plug up the air flue both ends.

Preferably, a protruding cylinder is fixed on the top of the cylinder body, and a through hole is formed in the protruding cylinder.

Through adopting above-mentioned technical scheme, utilize the through-hole on the protruding section of thick bamboo can conveniently be with this device fixed use.

To sum up, the utility model discloses mainly have following beneficial effect:

when gas is discharged from the gas inlet on the gripper seat, the gas enters the gas passage in the piston rod from the gas inlet, and then enters the groove on the piston from the gas outlet at the upper part of the gas passage, so that the piston is pushed and the conical block is driven to vertically slide, the two first connecting rods are driven to swing, the third connecting rods are driven to horizontally swing by utilizing the traction of the second connecting rods, so that the two third connecting rods are driven to mutually approach, the clamping effect is realized, when the gas is stopped to be introduced into the gas inlet, the conical block is driven to return by the piston under the elastic action of the return spring, so that the two third connecting rods are driven to open, and the clamping effect is relieved; the pneumatic gripper is relatively simple in internal structure, different from the conventional gripper structure, and does not adopt more transmission parts; compared with the traditional gripping clamp, the pneumatic gripping clamp can realize automatic return; and by means of the structure of the design, the clamping jaw does not depend on a swinging mode, the stroke amplitude is small, and the clamping jaw is suitable for certain narrow occasions.

Drawings

FIG. 1 is one of the schematic structural views of a pneumatic gripper;

FIG. 2 is a cross-sectional view of the pneumatic gripper configuration;

fig. 3 is a second schematic view of the pneumatic gripper.

Reference numerals: 1. a gripper seat; 2. a cylinder body; 3. a piston; 4. a conical block; 5. a piston rod; 6. an airway; 7. an air inlet; 8. a groove; 9. an air outlet; 10. a first link; 11. a second link; 12. a kidney-shaped groove; 13. a first fixed column; 14. a third link; 15. a second fixed column; 16. a return spring; 17. a bolt; 18. an annular seal ring; 19. a threaded ring; 20. an anti-skid briquette; 21. a clip; 22. blocking; 23. a projecting cylinder; 24. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a pneumatic gripper comprises a gripper seat 1, in order to achieve the purpose of pneumatic control, a cylinder body 2 is fixed on the top of the gripper seat 1, a piston 3 is connected in the cylinder body 2 in a sliding manner along the vertical direction, and a conical block 4 is fixed on the bottom of the piston 3, wherein the piston 3 can drive the conical block 4 to slide; in order to inflate to make piston 3 slide, install and be fixed with piston 3 pole jointly inside cylinder body 2 and tongs seat 1, piston 3 pole is inside to have seted up air flue 6, set up the air inlet 7 that leads to air flue 6 in the piston 3 pole on tongs seat 1, set up fluted 8 at the top of piston 3, set up the gas outlet 9 that leads to fluted 8 from air flue 6 on piston 3 pole, when admitting air in air flue 6 from air inlet 7, can blow out gas drive piston 3 and conical block 4 through gas outlet 9 in to fluted 8 and push down.

Referring to fig. 1 to 3, in order to complete the grabbing action by utilizing the downward pressing of the conical block 4, two first connecting rods 10 are symmetrically hinged to the bottom of the conical block 4, two second connecting rods 11 are symmetrically hinged inside the gripper seat 1, two kidney-shaped grooves 12 are respectively formed at two ends of the two second connecting rods 11, meanwhile, first fixing columns 13 which can be slidably connected into the kidney-shaped grooves 12 are respectively fixed at one ends of the two first connecting rods 10, two third connecting rods 14 are symmetrically slidably connected into the gripper seat 1 along the horizontal direction, second fixing columns 15 which can be slidably connected into the kidney-shaped grooves 12 are respectively fixed at the end parts of the two third connecting rods 14, and when the first connecting rods 10 swing, the second connecting rods 11 can be driven to swing, the third connecting rods 14 can be driven to horizontally slide, and the grabbing action is completed; in order to realize the grabbing return, a return spring 16 is further sleeved outside the piston 3 rod, one end of the return spring 16 is fixed outside the piston 3 rod, the other end of the return spring 16 is fixed on the piston 3, and the piston 3 can return under the action of the return spring 16 when the inflation is stopped.

Referring to fig. 1 to 3, in order to fix the conical block 4 to the piston 3, the piston 3 is connected to the conical block 4 by two bolts 17, and the connection and fixation of the piston 3 to the conical block 4 can be conveniently realized by using the bolts 17; in order to improve the sealing performance of the piston 3 during sliding, an annular sealing ring 18 is embedded and fixed on the annular wall of the piston 3, wherein the annular sealing ring 18 on the piston 3 can increase the sealing performance of the piston 3 during sliding; in order to facilitate assembly and production, a threaded ring 19 is connected to the bottom end of the piston 3 rod in a threaded manner, the threaded ring 19 is installed on the gripper seat 1 in a threaded manner, and the piston 3 rod can be conveniently installed and fixed in the device by utilizing the threaded ring 19; in order to realize stable grabbing, two anti-skidding pressing blocks 20 are fixed at the end part of one third connecting rod 14, a clamping piece 21 is fixed at the end part of the other third connecting rod 14, and clamping can be stably realized by using the anti-skidding pressing blocks 20 and the clamping piece 21; the air passage 6 is arranged to completely penetrate through the piston 3 rod, the piston 3 rod is respectively provided with the plugs 22 at two ends of the air passage 6 in a sealing manner, the penetrated air passage 6 has the characteristic of convenient processing, and two ends of the air passage 6 can be plugged by utilizing the plugs 22; meanwhile, a protruding cylinder 23 is fixed to the top of the cylinder body 2, a through hole 24 is formed in the protruding cylinder 23, and the device can be conveniently fixed to use by means of the protruding cylinder 23 and the through hole 24 in the protruding cylinder 23.

In summary, when gas is discharged from the gas inlet 7 on the gripper seat 1, the gas enters the gas passage 6 in the rod of the piston 3 from the gas inlet 7, and then enters the groove 8 on the piston 3 from the gas outlet 9 at the upper part of the gas passage 6, so that the piston 3 is pushed and the conical block 4 is driven to vertically slide, the two first connecting rods 10 are driven to swing, the third connecting rods 14 are driven to horizontally swing by utilizing the traction of the second connecting rods 11, so that the two third connecting rods 14 are driven to approach each other, and the clamping effect is realized; the pneumatic gripper is relatively simple in internal structure, different from the conventional gripper structure, and does not adopt more transmission parts; compared with the traditional gripping clamp, the pneumatic gripping clamp can realize automatic return; and by means of the structure of the design, the clamping jaw does not depend on a swinging mode, the stroke amplitude is small, and the clamping jaw is suitable for certain narrow occasions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pneumatic grab clamp, includes tongs seat (1), its characterized in that: the top of the gripper seat (1) is fixed with a cylinder body (2), a piston (3) is connected in the cylinder body (2) in a sliding manner along the vertical direction, a conical block (4) is fixed at the bottom of the piston (3), the piston (3) can drive the conical block (4) to slide, a piston (3) rod is jointly installed and fixed in the cylinder body (2) and the gripper seat (1), an air passage (6) is formed in the piston (3) rod, an air inlet (7) leading to the air passage (6) in the piston (3) rod is formed in the gripper seat (1), a groove (8) is formed in the top of the piston (3), an air outlet (9) leading from the air passage (6) to the groove (8) is formed in the piston (3) rod, two first connecting rods (10) are symmetrically hinged to the bottom of the conical block (4), the inside symmetry of tongs seat (1) articulates there are two second connecting rods (11), two kidney slot (12), two have been seted up respectively at the both ends of second connecting rod (11) the one end of first connecting rod (10) is fixed with respectively and can slides and connect and be in first fixed column (13) in kidney slot (12), it is connected with two third connecting rods (14), two to slide along the horizontal direction symmetry in tongs seat (1) third connecting rod (14) tip is fixed with respectively and can slide and connect and be in second fixed column (15) in kidney slot (12), piston (3) pole outside still overlaps and is equipped with return spring (16), the one end of return spring (16) is fixed piston (3) pole outside, the other end of return spring (16) is fixed on piston (3).

2. A pneumatic gripper according to claim 1, wherein: the piston (3) is connected with the conical block (4) through a plurality of bolts (17).

3. A pneumatic gripper according to claim 1, wherein: and an annular sealing ring (18) is embedded and fixed on the annular wall of the piston (3).

4. A pneumatic gripper according to claim 1, wherein: the bottom end of the piston (3) rod is connected with a threaded ring (19) in a threaded manner, and the threaded ring (19) is installed on the gripper seat (1) in a threaded manner.

5. A pneumatic gripper according to claim 1, wherein: two anti-skidding pressing blocks (20) are fixed at the end part of one third connecting rod (14), and a clamping piece (21) is fixed at the end part of the other third connecting rod (14).

6. A pneumatic gripper according to claim 1, wherein: the air passage (6) completely penetrates through the piston (3) rod, and the two ends of the piston (3) rod of the air passage (6) are respectively provided with a plug (22) in a sealing mode.

7. A pneumatic gripper according to claim 1, wherein: a protruding cylinder (23) is fixed to the top of the cylinder body (2), and a through hole (24) is formed in the protruding cylinder (23).