Thin pneumatic claw

Abstract

The utility model discloses a thin type pneumatic claw, which relates to the field of clamps and comprises a cylinder body, a first cavity and a second cavity are formed in the cylinder body, a first piston column is arranged in the first cavity in a sliding mode along the axial direction, and a second piston column with the same structure as the first piston column is arranged in the second cavity in a sliding mode along the axial direction. A first rack is arranged on the peripheral side of the first piston column, a second rack is arranged on the peripheral side of the second piston column, and a gear meshed with the first rack and the second rack at the same time is rotationally arranged in the cylinder body. The first piston column comprises a first connecting shaft and a first piston part, the first rack is arranged on the first connecting shaft, and the periphery of the first piston part is sleeved with a first sealing ring; the second piston column comprises a second connecting shaft and a second piston part, the second rack is arranged on the second connecting shaft, and the periphery of the second piston part is sleeved with a second sealing ring. The utility model has the advantages of good processing precision and low cost.

Description

Technical Field

[0001] The utility model relates to the field of clamps, in particular to a thin air claw. Background Art

[0002] Thin air grippers are a common pneumatic clamp with advantages such as light structure and small space occupation. Thin air grippers usually include a cylinder body, in which two chambers are formed, and air passages connected to the air source are arranged at both ends of the two chambers. A piston column is arranged in each chamber, and pistons are arranged at both ends of the piston column to reciprocate under the push of air pressure. The two piston columns are respectively connected to a clamping block through a lever, and a rack is arranged in the middle of the two piston columns. A gear meshed with the two racks is arranged in the two chambers, so that the two piston columns can move synchronously toward or away from each other to drive the two clamping blocks to clamp or release the workpiece.

[0003] In the above-mentioned thin air claw, the piston column is made of stainless steel in one piece and then turned to form a rack. When the piston column is long, the processing cost is high, the positioning error when processing the rack of the piston column is large, and the processing accuracy is low. Summary of the invention

[0004] The utility model aims to provide a thin air claw which can maintain good processing accuracy when the piston column is long and reduce processing costs.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] The utility model provides a thin air gripper, which comprises a cylinder body, a slide rail is arranged on the surface of the cylinder body, a first clamping block and a second clamping block are slidably arranged on the slide rail; a first chamber and a second chamber are formed in the cylinder body, a first piston column is slidably arranged in the first chamber along the axial direction, a second piston column with the same structure as the first piston column is slidably arranged in the second chamber along the axial direction, the first piston column is connected to the first clamping block, the second piston column is connected to the second clamping block, a first rack is arranged on the circumference of the first piston column, a second rack is arranged on the circumference of the second piston column, and a gear meshing with the first rack and the second rack is rotatably arranged in the cylinder body;

[0007] The first piston column comprises a first connecting shaft and a first piston part, the first rack is arranged on the first connecting shaft, the first piston part is detachably connected to each of the two opposite ends of the first connecting shaft, and the first piston part is sleeved with a first sealing ring adapted to the first chamber on the outer periphery;

[0008] The second piston column includes a second connecting shaft and a second piston part. The second rack is arranged on the second connecting shaft. The second piston part is detachably connected to each of the two opposite ends of the second connecting shaft. The outer periphery of the second piston part is provided with a second sealing ring adapted to the second chamber.

[0009] Furthermore, a first positioning protrusion is protruding from a middle portion of the first piston portion on one side facing the first connecting shaft, and a first positioning recess is formed on a side of the first connecting shaft facing the first piston portion and matched with the first positioning protrusion.

[0010] Furthermore, a first sealing groove is formed on the edge of the first positioning protrusion, a first flat ring is installed in the first sealing groove, and the first flat ring abuts between the first piston part and the first connecting shaft.

[0011] Furthermore, a first connecting hole coaxial with the first positioning protrusion is provided in the middle of the first piston part, and a first threaded hole aligned with the first connecting hole is provided at one end of the first connecting shaft facing the first piston part. The first connecting hole and the first threaded hole are aligned and a connecting screw is passed through them at the same time.

[0012] Furthermore, a first mounting groove is provided on the outer periphery of the first piston part, and the first sealing ring is installed in the first mounting groove; the first sealing ring is a Y-shaped ring.

[0013] Further, a diameter of an end of the first piston portion away from the first connecting shaft is smaller than a diameter of an end of the first piston portion close to the first connecting shaft.

[0014] Furthermore, the thin air gripper also includes a first stroke limiting mechanism and a second stroke limiting mechanism, the first stroke limiting mechanism includes a first adjusting bolt adjustably connected to the end of the first chamber and a first adjusting nut matched with the first adjusting bolt, the second stroke limiting mechanism includes a second adjusting bolt adjustably connected to the end of the second chamber and a second adjusting nut matched with the second adjusting bolt.

[0015] Furthermore, the first stroke limiting mechanism also includes a first limiting block, which is connected to one end of the first adjusting bolt toward the first piston column, and the first limiting block protrudes radially from the first adjusting bolt and can abut against the end surface of the first piston part away from the first connecting shaft.

[0016] Furthermore, a bolt connecting portion is coaxially arranged at the end of the first adjusting bolt near the first limiting block, the diameter of the bolt connecting portion is smaller than the first adjusting bolt and forms a step with the end face of the first adjusting bolt, a connecting screw hole is opened in the middle of the first limiting block, the bolt connecting portion is threadedly engaged with the connecting screw hole, and the first limiting block protrudes from the middle of one side of the first adjusting bolt to form a protrusion engaged with the step.

[0017] Furthermore, the first piston part is made of aluminum, and the first connecting shaft is made of stainless steel.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. In the thin air gripper of the utility model, the first piston column and the second piston column move toward or away from each other under the driving of air pressure to drive the clamping block to clamp or release the workpiece. The first piston column includes a first connecting shaft and two first piston parts detachably connected to the two ends of the first connecting shaft. When processing the first rack on the first connecting shaft, it is only necessary to position and clamp the first connecting shaft. The overall length is small and the processing accuracy is high. After processing, the first piston part is connected to the first connecting shaft, so that the first piston column has a larger length to meet the longer stroke; the second piston column can be similarly processed by first processing the second rack on the second connecting shaft and then connecting the second piston part. In this way, when the length requirements of the larger and longer first piston column and the second piston column are met, the processing accuracy of the first rack and the second rack is guaranteed. At the same time, due to the shortened length of the first connecting shaft and the second connecting shaft, the casting process is simpler and the cost is reduced.

[0020] 2. The first piston part and the first connecting shaft cooperate with each other through the first positioning protrusion and the first positioning recess, so that the first piston part is accurately positioned when connected to the first connecting shaft. At the same time, the shear force exerted on the connecting screw when the first piston part and the first connecting shaft are connected can be dispersed through the positioning protrusion and the positioning recess, so that the connection strength is greater and the overall structure is more stable.

[0021] 3. The end of the first adjusting bolt of the first stroke limiting mechanism contacts the first piston part through the first limiting block, which increases the contact area, reduces the loss of the first piston part when stress acts on the first piston part, and improves the service life of the thin air claw; at the same time, the first connecting hole opened on the first piston part will not affect the limitation of the first stroke limiting mechanism on the first piston column, making its structure more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a thin air gripper according to an embodiment of the utility model.

[0023] Figure 2The utility model is a schematic diagram of a horizontal cross-sectional structure of a thin air gripper passing through the center axis of the first piston column according to an embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the exploded structure of a thin air gripper according to an embodiment of the utility model.

[0025] Figure 4 It is a schematic diagram of the front structural view of the first piston column of an embodiment of the utility model.

[0026] Figure 5 It is a schematic diagram of the horizontal cross-sectional structure of the first piston column passing through the central axis of the first piston column in one embodiment of the utility model.

[0027] Figure 6 It is a schematic diagram of the horizontal cross-section structure of the second piston column passing through the central axis of the second piston column in one embodiment of the utility model.

[0028] Figure 7 It is a schematic diagram of the horizontal cross-sectional structure of a first travel limiting mechanism and a second travel limiting mechanism passing through the center axis of a first adjusting bolt in one embodiment of the utility model.

[0029] In the figure:

[0030] 1000, thin air claw; 100, cylinder; 110, first chamber; 120, second chamber; 130, transmission chamber; 140, gear; 200, slide rail; 300, first clamping block; 310, first lever; 400, second clamping block; 410, second lever; 500, first piston column; 510, first rack; 520, first connecting shaft; 521, first positioning recess; 522, first threaded hole; 530, first piston part; 531, first positioning protrusion; 532, first connecting hole; 533, first sealing groove; 534, first flat ring; 535, first mounting groove; 540, first sealing ring; 600, second piston column; 610, second rack; 6 20. Second connecting shaft; 621. Second positioning recess; 622. Second threaded hole; 630. Second piston part; 631. Second positioning protrusion; 632. Second connecting hole; 633. Second sealing groove; 634. Second flat ring; 635. Second mounting groove; 640. Second sealing ring; 700. Connecting screw; 800. First stroke limit mechanism; 810. First adjusting bolt; 820. First adjusting nut; 830. First limit block; 831. Connecting screw hole; 832. Protrusion; 840. Bolt connecting part; 850. Step; 900. Second stroke limit mechanism; 910. Second adjusting bolt; 920. Second adjusting nut; 930. Second limit block. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings.

[0032] This embodiment discloses a thin air gripper 1000, referring to Figure 1 The thin air gripper 1000 includes a cylinder body 100, a slide rail 200 is disposed on the surface of the cylinder body 100, and a first clamping block 300 and a second clamping block 400 are slidably disposed on the slide rail 200. The first clamping block 300 and the second clamping block 400 can move toward each other to clamp the workpiece or move away from each other to release the workpiece under air pressure driving.

[0033] Reference Figure 2 and Figure 3 , a first chamber 110 and a second chamber 120 are formed in the cylinder body 100. The first chamber 110 and the second chamber 120 are arranged parallel to the length direction of the cylinder body 100. A first piston column 500 is slidably arranged in the first chamber 110 along the axial direction, and a second piston column 600 is slidably arranged in the second chamber 120 along the axial direction. The first piston column 500 is connected to the first clamping block 300 through the first lever 310, and the second piston column 600 is connected to the second clamping block 400 through the second lever 410. Therefore, when compressed gas is introduced into the first chamber 110, the first piston column 500 drives the first clamping block 300 to move under the action of gas pressure; when compressed gas is introduced into the second chamber 120, the second piston column 600 drives the second clamping block 400 to move.

[0034] Reference Figure 2 A first rack 510 is disposed on the periphery of the first piston column 500, and a second rack 610 is disposed on the periphery of the second piston column 600. A transmission chamber 130 is disposed in the cylinder body 100 and is communicated with the middle of the first chamber 110 and the middle of the second chamber 120. A gear 140 is rotatably disposed in the transmission chamber 130 and is simultaneously meshed with the first rack 510 and the second rack 610, so that the first piston column 500 and the second piston column 600 can move synchronously toward or away from each other through the transmission of the gear 140.

[0035] Reference Figure 2 , Figure 4 and Figure 5 The first piston column 500 includes a first connecting shaft 520 and a first piston part 530. The first rack 510 is arranged on the circumference of the first connecting shaft 520 and extends axially along the first connecting shaft 520. The first piston part 530 is detachably connected to each of the two opposite ends of the first connecting shaft 520, and a first sealing ring 540 adapted to the first chamber 110 is sleeved on the outer circumference of each first piston part 530. Thus, the two first piston parts 530 respectively seal the first chambers 110 at the two ends of the first connecting shaft 520, so that when compressed gas is introduced into the two ends of the first chamber 110, the first piston rod can be driven to move.

[0036] The second piston column 600 includes a second connecting shaft 620 and a second piston part 630. The second rack 610 is arranged on the circumference of the second connecting shaft 620 and extends along the axial direction of the second connecting shaft 620. The second piston part 630 is detachably connected to each of the two opposite ends of the second connecting shaft 620. The outer circumferences of the two second piston parts 630 are both sleeved with second sealing rings 640 adapted to the second chamber 120.

[0037] Therefore, when processing the first rack 510 on the first connecting shaft 520, it is only necessary to position and clamp the first connecting shaft 520 and the second connecting shaft 620. The length of the first connecting shaft 520 is relatively short and the processing accuracy is relatively high. After processing, the first piston part 530 is connected to the first connecting shaft 520, so that the first piston column 500 has a larger length to meet the longer stroke. Similarly, the second piston column 600 can be processed by first processing the second rack 610 on the second connecting shaft 620, and then connecting the second piston part 630. In this way, when the length requirements of the larger and longer first piston column 500 and the second piston column 600 are met, the processing accuracy of the first rack 510 and the second rack 610 is guaranteed. At the same time, due to the shortened length of the first connecting shaft 520 and the second connecting shaft 620, the casting process is relatively simple and the cost is reduced.

[0038] In this embodiment, the first connecting shaft 520 and the second connecting shaft 620 are both made of stainless steel, so that the first connecting shaft 520 and the second connecting shaft 620 have sufficient strength. The first piston part 530 and the second piston part 630 are both made of aluminum blocks to reduce the weight of the first piston part 530 and the second piston part 630.

[0039] Reference Figure 2 and Figure 5 A first positioning protrusion 531 is convexly provided on the middle part of the first piston part 530 on one side facing the first connecting shaft 520, and a first positioning recess 521 matching with the first positioning protrusion 531 is provided on the side of the first connecting shaft 520 facing the first piston part 530. When the first piston part 530 and the first connecting shaft 520 are connected, the first positioning protrusion 531 is inserted into the first positioning recess 521 and matched with the first positioning recess 521, so that the first piston part 530 and the first connecting shaft 520 are accurately positioned when connected, and at the same time, the shear force received by the first piston part 530 and the first connecting shaft 520 when connected can be dispersed through the positioning protrusion and the positioning recess, so that the connection strength is greater and the overall structure is more stable.

[0040] In this embodiment, the first piston part 530 and the first connecting shaft 520 are connected by screws. Specifically, a first connecting hole 532 coaxial with the first positioning protrusion 531 is provided in the middle of the first piston part 530, and a first threaded hole 522 aligned with the first connecting hole 532 is provided at one end of the first connecting shaft 520 facing the first piston part 530. The first connecting hole 532 and the first threaded hole 522 are aligned and a connecting screw 700 is penetrated at the same time. The first connecting screw 700 passes through the first connecting hole 532 and the first threaded hole 522 to threadably cooperate, so as to realize the connection between the first piston part 530 and the first connecting shaft 520. This connection method has a simple structure, is easy to disassemble and assemble, and has a reliable connection.

[0041] A first sealing groove 533 is formed at the edge of the first positioning protrusion 531, and a first flat ring 534 is installed in the first sealing groove 533. The first flat ring 534 abuts between the first piston part 530 and the first connecting shaft 520. The first flat ring 534 seals the connection part between the first piston part 530 and the first connecting shaft 520 to ensure the airtightness of the first piston column 500. At the same time, the first flat ring 534 plays a buffering role when the first piston part 530 and the first connecting shaft 520 are connected, so as to avoid local stress concentration and damage when the first piston part 530 and the first connecting shaft 520 are connected.

[0042] The outer periphery of the first piston portion 530 is provided with a first mounting groove 535, and the first sealing ring 540 is installed in the first mounting groove 535. In this embodiment, the first sealing ring 540 is a Y-shaped ring, the outer ring of the first sealing ring 540 abuts against the inner wall of the first chamber 110, and the inner ring of the first sealing ring 540 abuts against the inner wall of the mounting groove to seal the gap between the first piston portion 530 and the first chamber 110.

[0043] The diameter of the end of the first piston part 530 away from the first connecting shaft 520 is smaller than the diameter of the end of the first piston part 530 close to the first connecting shaft 520. That is, the end of the first piston part 530 away from the first connecting shaft 520 is smaller, so as to reduce the weight and consumables of the first piston part 530, and at the same time, the friction between the first piston part 530 and the inner wall of the first chamber 110 is smaller when the first piston column 500 reciprocates.

[0044] Reference Figure 2 and Figure 6 The structure of the second piston column 600 is completely the same as that of the first piston column 500. A second positioning protrusion 631 is provided on the middle part of the second piston portion 630 facing the second connecting shaft 620, and a second positioning recess 621 matching the second positioning protrusion 631 is provided on the side of the second connecting shaft 620 facing the second piston portion 630.

[0045] A second connecting hole 632 coaxial with the second positioning protrusion 631 is provided in the middle of the second piston part 630, and a second threaded hole 622 aligned with the second connecting hole 632 is provided at one end of the second connecting shaft 620 facing the second piston part 630. The second piston part 630 is connected to the second connecting shaft 620 by a connecting screw 700 passing through the second connecting hole 632 and threadedly engaging with the second threaded hole 622.

[0046] A second sealing groove 633 is formed at the edge of the second positioning protrusion 631, and a second flat ring 634 is installed in the second sealing groove 633. The second flat ring 634 abuts between the second piston part 630 and the second connecting shaft 620 to ensure the airtightness of the second piston column 600.

[0047] The second piston portion 630 is provided with a second mounting groove 635 on its outer periphery, and the second sealing ring 640 is mounted in the second mounting groove 635. In this embodiment, the second sealing ring 640 is a Y-shaped ring, and the outer ring of the second sealing ring 640 abuts against the inner wall of the second chamber 120, and the inner ring of the second sealing ring 640 abuts against the inner wall of the second mounting groove 635 to seal the gap between the second piston portion 630 and the second chamber 120.

[0048] The diameter of the end of the second piston part 630 away from the second connecting shaft 620 is smaller than the diameter of the end of the second piston part 630 close to the second connecting shaft 620, so that the end of the second piston part 630 away from the second connecting shaft 620 is smaller, so as to strengthen the weight and consumables of the second piston part 630, and at the same time reduce the friction between the second piston part 630 and the inner wall of the second chamber 120 when the second piston column 600 reciprocates.

[0049] Reference Figures 1 to 3 The thin air gripper 1000 further includes a first stroke limiting mechanism 800 and a second stroke limiting mechanism 900. The first stroke limiting mechanism 800 and the second stroke limiting mechanism 900 are both disposed on the cylinder body 100.

[0050] Reference Figure 2 and Figure 7The first stroke limiting mechanism 800 includes a first adjusting bolt 810 that is adjustably connected to the end of the first chamber 110 and a first adjusting nut 820 that matches the first adjusting bolt 810. The second stroke limiting mechanism 900 includes a second adjusting bolt 910 that is adjustably connected to the end of the second chamber 120 and a second adjusting nut 920 that matches the second adjusting bolt 910. By adjusting the cooperation between the first adjusting bolt 810 and the first adjusting nut 820, the length of the first adjusting bolt 810 extending into the first chamber 110 can be adjusted, thereby limiting the moving distance of the end of the first piston column 500 close to the first adjusting bolt 810, and achieving the adjustment of the stroke of the first piston column 500. By adjusting the cooperation between the second adjusting bolt 910 and the second adjusting nut 920, the length of the second adjusting bolt 910 extending into the second chamber 120 can be adjusted, thereby limiting the moving distance of the end of the second piston column 600 close to the second adjusting bolt 910, and achieving the adjustment of the stroke of the second piston column 600.

[0051] The first stroke limiting mechanism 800 further includes a first limiting block 830, which is connected to one end of the first adjusting bolt 810 facing the first piston column 500. The first limiting block 830 protrudes radially from the first adjusting bolt 810 and can abut against the end surface of the first piston part 530 away from the first connecting shaft 520. Thus, the area of ​​one end of the first stroke limiting mechanism 800 used for limiting the first piston column 500 is increased by the provision of the first limiting block 830, so that when the first stroke limiting mechanism 800 limits the first piston column 500, the collision area between the first piston column 500 and the first stroke limiting mechanism 800 is larger, the force bearing area is increased, and the collision wear between the first piston column 500 and the first stroke limiting mechanism 800 is reduced. At the same time, the middle part of the first piston part 530 is avoided, so that when the first piston part 530 is provided with a connecting hole, it will not affect the limiting of the first piston column 500 by the first stroke limiting mechanism 800.

[0052] A bolt connection part 840 is coaxially arranged at the end of the first adjusting bolt 810 near the first limiting block 830. The diameter of the bolt connection part 840 is smaller than the diameter of the first adjusting bolt 810. The bolt connection part 840 and the end surface of the first adjusting bolt 810 form a step 850. A connecting screw hole 831 is provided in the middle of the first limiting block 830. The bolt connection part 840 is threadedly matched with the connecting screw hole 831. The first limiting block 830 protrudes toward the middle of one side of the first adjusting bolt 810 to form a raised part 832 matched with the step 850. Therefore, when the first limiting block 830 is threadedly connected with the bolt connection part 840, the raised part 832 is matched with the step 850 formed on the first adjusting bolt 810, so that the connection between the first limiting block 830 and the first adjusting bolt 810 is more stable and the connection strength is better.

[0053] The structure of the second stroke limiting mechanism 900 is the same as that of the first stroke limiting mechanism 800. A second limiting block 930 is connected to one end of the second adjusting bolt 910 facing the second piston column 600, and the second stroke limiting mechanism 900 abuts against the end surface of the second piston part 630 through the second limiting block 930 to limit the stroke of the second piston column 600. In this embodiment, the second limiting block 930 and the first limiting block 830 are both formed by processing an aluminum block, wherein the connection structure between the second limiting block 930 and the second adjusting bolt 910 is the same as the connection structure between the first limiting block 830 and the first adjusting bolt 810, and will not be repeated here.

[0054] The above are only preferred implementations of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles of the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A thin air gripper, comprising a cylinder body (100), a slide rail (200) being arranged on the surface of the cylinder body (100), a first clamping block (300) and a second clamping block (400) being slidably arranged on the slide rail (200); a first chamber (110) and a second chamber (120) being formed in the cylinder body (100), a first piston column (500) being slidably arranged in the axial direction in the first chamber (110), and a second piston column (500) being slidably arranged in the axial direction in the second chamber (120). ) a second piston column (600) of the same structure, the first piston column (500) is connected to the first clamping block (300), the second piston column (600) is connected to the second clamping block (400), a first rack (510) is arranged on the circumference of the first piston column (500), a second rack (610) is arranged on the circumference of the second piston column (600), and a gear (140) is rotatably arranged in the cylinder body (100) and is meshed with the first rack (510) and the second rack (610) at the same time; It is characterized in that The first piston column (500) comprises a first connecting shaft (520) and a first piston part (530), the first rack (510) is arranged on the first connecting shaft (520), the first piston part (530) is detachably connected to each of the two opposite ends of the first connecting shaft (520), and the first piston part (530) is sleeved with a first sealing ring (540) adapted to the first chamber (110) on the outer periphery thereof; The second piston column (600) includes a second connecting shaft (620) and a second piston part (630), the second rack (610) is arranged on the second connecting shaft (620), the second piston part (630) is detachably connected to each of the two opposite ends of the second connecting shaft (620), and the outer periphery of the second piston part (630) is provided with a second sealing ring (640) adapted to the second chamber (120).

2. A thin air gripper as claimed in claim 1, characterized in that: A first positioning protrusion (531) is protruding from the middle of the first piston part (530) toward the first connecting shaft (520), and a first positioning recess (521) that fits with the first positioning protrusion (531) is formed on the side of the first connecting shaft (520) toward the first piston part (530).

3. A thin air gripper as claimed in claim 2, characterized in that: A first sealing groove (533) is formed at the edge of the first positioning protrusion (531), a first flat ring (534) is installed in the first sealing groove (533), and the first flat ring (534) abuts between the first piston part (530) and the first connecting shaft (520).

4. A thin air gripper as claimed in claim 2 or 3, characterized in that: A first connecting hole (532) coaxial with the first positioning protrusion (531) is provided in the middle of the first piston part (530), and a first threaded hole (522) aligned with the first connecting hole (532) is provided at one end of the first connecting shaft (520) facing the first piston part (530). The first connecting hole (532) and the first threaded hole (522) are aligned and a connecting screw (700) is passed through them at the same time.

5. A thin air gripper as claimed in claim 1, characterized in that: A first mounting groove (535) is provided on the outer periphery of the first piston portion (530), and the first sealing ring (540) is installed in the first mounting groove (535); the first sealing ring (540) is a Y-shaped ring.

6. A thin air gripper as claimed in claim 1, characterized in that: The diameter of an end of the first piston portion (530) away from the first connecting shaft (520) is smaller than the diameter of an end of the first piston portion (530) close to the first connecting shaft (520).

7. A thin air gripper as claimed in claim 1, characterized in that: The thin air gripper also includes a first stroke limiting mechanism (800) and a second stroke limiting mechanism (900), wherein the first stroke limiting mechanism (800) includes a first adjusting bolt (810) adjustably connected to the end of the first chamber (110) and a first adjusting nut (820) matched with the first adjusting bolt (810), and the second stroke limiting mechanism (900) includes a second adjusting bolt (910) adjustably connected to the end of the second chamber (120) and a second adjusting nut (920) matched with the second adjusting bolt (910).

8. A thin air gripper as claimed in claim 7, characterized in that: The first stroke limit mechanism (800) also includes a first limit block (830), which is connected to one end of the first adjusting bolt (810) toward the first piston column (500), and the first limit block (830) protrudes radially from the first adjusting bolt (810) and can abut against the end surface of the first piston part (530) away from the first connecting shaft (520).

9. A thin air gripper as claimed in claim 8, characterized in that: A bolt connection portion (840) is coaxially arranged at the end of the first adjusting bolt (810) close to the first limiting block (830); the diameter of the bolt connection portion (840) is smaller than that of the first adjusting bolt (810) and forms a step (850) with the end surface of the first adjusting bolt (810); a connecting screw hole (831) is opened in the middle of the first limiting block (830); the bolt connection portion (840) is threadedly engaged with the connecting screw hole (831); the first limiting block (830) protrudes toward the middle of one side of the first adjusting bolt (810) to form a protrusion (832) engaged with the step (850).

10. A thin air gripper as claimed in claim 1, characterized in that: The first piston part (530) is made of aluminum, and the first connecting shaft (520) is made of stainless steel.

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