Quick model changing clamping jaw structure of pneumatic clamping device

Abstract

The utility model relates to the technical field of clamping jaws, and discloses a quick-change clamping jaw structure of a pneumatic gripper, which comprises an air cylinder and two first clamping jaws, and a support is fixedly mounted on one side of the air cylinder; when the threaded shaft rotates, the first folding rod and the second folding rod on the two sides move reversely at the same time, then the distance between the two first clamping jaws is changed, the structure can flexibly clamp objects of different sizes, the two positioning bases move outwards along the limiting bases by controlling the shifting rods, then limitation of the positioning bases to the positioning grooves is relieved, and the clamping effect is improved. The second clamping jaw is further rotated to enable the positioning groove in the second clamping jaw to be aligned with the other positioning base, at the moment, the shifting rod is loosened, the positioning base can be embedded into the positioning groove under the action of the supporting spring, the effect of rapidly extending the length of the first clamping jaw is achieved, the shape of the second clamping jaw is benefited, and the structure can clamp a tighter object.

Description

Technical Field

[0001] This utility model relates to the field of gripper technology, specifically a quick-change gripper structure for a pneumatic gripper. Background Technology

[0002] The gripper of a pneumatic gripper, also known as a pneumatic finger or pneumatic chuck, is an end effector that uses compressed air to drive the gripping of workpieces. The compressed air drives the piston to move, which is converted into the opening and closing action of the gripper. It can replace manual gripping and improve the efficiency and safety of automated production lines.

[0003] Chinese patent CN219075721U discloses a quick-change gripper structure suitable for pneumatic grippers. The structure includes a cylinder, a first gripper, a second gripper opposite to the first gripper, a first piston, a second piston, and a return spring. The middle portion of the first gripper is rotatably connected to the cylinder, and the middle portion of the second gripper is also rotatably connected to the cylinder. The cylinder contains an air passage for connecting to a compressed air cylinder and an air chamber connecting the air passage. The first and second pistons are located in the air chamber. Simultaneously, the first piston abuts against the lower part of the first gripper, and the second piston abuts against the lower part of the second gripper. The upper parts of the first and second grippers are connected by the return spring. This invention, employing the above structure, can grip workpieces with a minimum thickness of 0.01mm, effectively preventing workpiece damage and increasing the roughness of the gripping surface, and preventing workpiece slippage during pneumatic gripping.

[0004] The above structure has the effect of preventing workpieces from falling off, but the existing structure can only be adapted to small-sized workpieces, resulting in low adaptability of the gripper. At the same time, the gripper length is limited, and the original gripper needs to be disassembled and replaced when changing the gripper, resulting in low gripper change efficiency. Therefore, a quick-change gripper structure for pneumatic grippers is needed. Utility Model Content

[0005] The purpose of this invention is to provide a quick-change gripper structure for a pneumatic gripper, so as to solve the problems of low adaptability of existing structures and low gripper change efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick-change gripper structure for a pneumatic gripper, comprising a cylinder and two grippers of type I, a bracket fixedly mounted on one side of the cylinder, and an adjustment mechanism provided on the two grippers of type I; the adjustment mechanism includes a mounting base, the mounting base being fixedly mounted on the output end of the cylinder, and two sliding rods being fixedly mounted side-by-side on both sides of the mounting base, with a first folding rod slidably mounted on the two sliding rods and rotatably mounted on the grippers of type I, a drive motor being fixedly mounted on one end of the bracket, a first gear being fixedly mounted on the output end of the drive motor, a threaded shaft being rotatably mounted on one side of the drive motor, a second gear being fixedly mounted on the middle of the threaded shaft, and a second folding rod being threadedly mounted on the threaded shaft and rotatably mounted on each of the two grippers of type I.

[0007] Preferably, the two slide rods are located on the same vertical plane, and both slide rods are slidably mounted on the first folding rod.

[0008] Preferably, the threads on both sides of the threaded shaft are in opposite directions, and the first gear and the second gear are meshed together.

[0009] Preferably, the two first grippers are provided with a changing mechanism, which includes two second grippers. The two second grippers are rotatably mounted on one end of the first gripper. Two limiting seats are fixedly installed on one side of the first gripper. A positioning seat is slidably installed in both limiting seats and through the first gripper. A support spring is fixedly installed between the positioning seat and the limiting seat. A lever is fixedly installed between the two positioning seats. A positioning groove is opened on one side of each of the two second grippers.

[0010] Preferably, both positioning seats are adapted to positioning slots, and the two positioning slots are connected in a straight line perpendicular to the inner side of the first gripper.

[0011] Preferably, rubber pads are fixedly installed on both the first and second grippers, and the inner sides of the first and second grippers are adapted to each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) This quick-change gripper structure for pneumatic grippers rotates the threaded shaft by controlling the drive motor. Benefiting from the opposite thread directions on both sides of the threaded shaft, and the first and second folding rods respectively rotating and mounted on the first gripper, and the first folding rod sliding on the slide rod, the first and second folding rods on both sides move in opposite directions simultaneously when the threaded shaft rotates, thereby changing the distance between the two first grippers. This allows the structure to flexibly grip objects of different sizes.

[0014] 2) This quick-change gripper structure for pneumatic grippers allows two positioning seats to move outward along the limiting seat by controlling the lever, thereby releasing the restriction of the positioning seat on the positioning groove. Further rotation of the second gripper aligns its upper positioning groove with another positioning seat. At this point, releasing the lever allows the positioning seat to be embedded into the positioning groove under the action of the support spring, achieving the effect of quickly extending the length of the first gripper. Benefiting from the shape of the second gripper, the structure can clamp items more tightly. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a quick-change gripper structure of a pneumatic gripper according to an embodiment of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the adjusting mechanism in an embodiment of the present utility model;

[0017] Figure 3 As an embodiment of this utility model Figure 2 Enlarged view of A in the middle;

[0018] Figure 4 This is a cross-sectional view of the changing mechanism in an embodiment of the present utility model;

[0019] Figure 5 As an embodiment of this utility model Figure 4 Enlarged view of B in the middle.

[0020] In the diagram: 1. Cylinder; 2. No. 1 gripper; 3. Bracket; 4. Adjustment mechanism; 401. Mounting base; 402. Slide rod; 403. No. 1 bending rod; 404. Drive motor; 405. First gear; 406. Threaded shaft; 407. Second gear; 408. No. 2 bending rod; 5. Changing mechanism; 501. No. 2 gripper; 502. Limit seat; 503. Positioning seat; 504. Support spring; 505. Lever; 506. Positioning groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Combination Figures 1-5A quick-change gripper structure for a pneumatic gripper includes a cylinder 1 and two grippers 2. A bracket 3 is fixedly mounted on one side of the cylinder 1, and an adjustment mechanism 4 is provided on the two grippers 2. The adjustment mechanism 4 includes a mounting base 401, which is fixedly mounted on the output end of the cylinder 1. Two sliding rods 402 are fixedly mounted side by side on both sides of the mounting base 401. A first folding rod 403 is slidably mounted on the two sliding rods 402 and rotatably mounted on the grippers 2. A drive motor 404 is fixedly mounted on one end of the bracket 3. A first gear 405 is fixedly mounted on the output end of the drive motor 404. A threaded shaft 406 is rotatably mounted on one side of the drive motor 404. A second gear 407 is fixedly mounted in the middle of the threaded shaft 406. A second folding rod 408 is threadedly mounted on the threaded shaft 406 and rotatably mounted on each of the two grippers 2.

[0024] See Figure 2 and Figure 3 Furthermore, it is found that the two slide rods 402 are located on the same vertical plane, and both slide rods 402 are slidably installed on the first folding rod 403. The threads on both sides of the threaded shaft 406 are opposite in direction, and the first gear 405 and the second gear 407 are meshed and connected.

[0025] Specifically, by rotating and mounting a first folding rod 403 and a second folding rod 408 on the first gripper 2, and sliding the first folding rod 403 on two sliding rods 402 on the same vertical plane, and threading the second folding rod 408 at both ends of a threaded shaft 406, wherein the threads on both sides of the threaded shaft 406 are in opposite directions, and further controlling the drive motor 404 to rotate the first gear 405 slightly, the threaded shaft 406 will rotate in the opposite direction with the first gear 405 under the action of the second gear 407, thereby causing the two second folding rods 408 to move in the opposite direction, thereby changing the distance between the two first grippers 2, so that the two first grippers 2 can clamp items of different sizes by changing the distance.

[0026] Example 2

[0027] Combination Figure 1 , Figure 4 and Figure 5 Two first-hand grippers 2 are equipped with a changing mechanism 5. The changing mechanism 5 includes two second-hand grippers 501. The two second-hand grippers 501 are rotatably mounted on one end of the first-hand gripper 2. Two limiting seats 502 are fixedly installed on one side of the first-hand gripper 2. Positioning seats 503 are slidably installed in the two limiting seats 502 and through the first-hand gripper 2. A support spring 504 is fixedly installed between the positioning seats 503 and the limiting seats 502. A lever 505 is fixedly installed between the two positioning seats 503. A positioning groove 506 is opened on one side of each of the two second-hand grippers 501.

[0028] See Figure 4and Figure 5 Furthermore, based on Embodiment 1, it is further found that both positioning seats 503 are adapted to positioning grooves 506, the two positioning grooves 506 are connected in a straight line perpendicular to the inner side of the first gripper 2, rubber pads are fixedly installed on both the first gripper 2 and the second gripper 501, and the inner sides of the first gripper 2 and the second gripper 501 are adapted to each other.

[0029] Specifically, by controlling the lever 505, the two positioning seats 503 move outward along the limiting seat 502, thereby releasing the restriction of the positioning seats 503 on the positioning groove 506. Further rotate the second gripper 501 so that its positioning groove 506 is aligned with another positioning seat 503. At this time, releasing the lever 505 will allow the positioning seat 503 to be embedded into the positioning groove 506 under the action of the support spring 504. The inner sides of the first gripper 2 and the second gripper 501 are adapted to each other, which can ensure that the inner sides of the first gripper 2 and the second gripper 501 are aligned when the second folding lever 408 is opened.

[0030] In actual operation, by rotating and installing a first folding rod 403 and a second folding rod 408 on the first gripper 2, and sliding the first folding rod 403 on two sliding rods 402 on the same vertical plane, and threading the second folding rod 408 at both ends of the threaded shaft 406, wherein the threads on both sides of the threaded shaft 406 are in opposite directions, and further controlling the drive motor 404 to rotate the first gear 405 slightly, the threaded shaft 406 will rotate in the opposite direction with the first gear 405 under the action of the second gear 407, thereby causing the two second folding rods 408 to move in the opposite direction, thereby changing the distance between the two first grippers 2, so that the two first grippers 2 can clamp items of different sizes by changing the distance;

[0031] By controlling the lever 505, the two positioning seats 503 move outward along the limiting seat 502, thereby releasing the restriction of the positioning seats 503 on the positioning groove 506. Further rotate the second gripper 501 so that its positioning groove 506 is aligned with another positioning seat 503. At this time, releasing the lever 505 will allow the positioning seat 503 to be embedded into the positioning groove 506 under the action of the support spring 504. The inner sides of the first gripper 2 and the second gripper 501 are adapted to each other, which can ensure that the inner sides of the first gripper 2 and the second gripper 501 are aligned when the second folding lever 408 is opened.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change jaw structure of a pneumatic gripper, comprising a cylinder (1) and two first jaws (2), one side of the cylinder (1) being fixedly provided with a support (3), characterized in that: Two said No. 1 clamping jaw (2) is provided with distance adjusting mechanism (4); The distance adjusting mechanism (4) includes a mounting seat (401), the mounting seat (401) is fixedly installed on the output end of the air cylinder (1), and two slide rods (402) are fixedly installed on the two sides of the mounting seat (401). One end of the support (3) is fixedly installed with a driving motor (404), the output end of the driving motor (404) is fixedly installed with a first gear (405), and one side of the driving motor (404) is rotatably installed with a threaded shaft (406). The middle part of the threaded shaft (406) is fixedly installed with a second gear (407), and the threaded shaft (406) is rotatably installed with a second gear (407). Two No. 1 clamping jaw (2) is screw mounted with two No. 2 folding rod (408).

2. The quick change jaw structure of a pneumatic gripper according to claim 1, wherein: Two said slide rod (402) is located in the same vertical plane, and two said slide rod (402) is slidably installed on the No. 1 folding rod (403).

3. The quick change jaw structure of a pneumatic gripper according to claim 1, wherein: The screw direction of the threaded shaft (406) on both sides is opposite, and the first gear (405) and the second gear (407) are engagedly connected.

4. The quick change jaw structure of a pneumatic gripper according to claim 1, wherein: Two said No. 1 clamping jaw (2) is provided with a shape changing mechanism (5), the shape changing mechanism (5) includes two No. 2 clamping jaw (501), two said No. 2 clamping jaw (501) is rotatably installed on one end of No. 1 clamping jaw (2), one side of the No. 1 clamping jaw (2) is fixedly installed with two limit seat (502), two said limit seat (502) and the through No. 1 clamping jaw (2) is slidably installed with a positioning seat (503), the positioning seat (503) and the limit seat (502) are fixedly installed with a supporting spring (504), two said positioning seat (503) is fixedly installed with a push rod (505), two said No. 2 clamping jaw (501) side is provided with a positioning groove (506).

5. The quick change jaw structure of a pneumatic gripper according to claim 4, wherein: Two said positioning seat (503) is matched with positioning groove (506), two said positioning groove (506) is connected in a straight line perpendicular to the inner side of No. 1 clamping jaw (2).

6. A quick change jaw structure for a pneumatic gripper according to claim 5, wherein: The No. 1 clamping jaw (2) and No. 2 clamping jaw (501) are fixedly installed with rubber pad, and the inner side of the No. 1 clamping jaw (2) and No. 2 clamping jaw (501) are matched with each other.

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