Pneumatic chuck

Abstract

The utility model relates to a pneumatic chuck which comprises a base, a clamping cover is fixedly arranged on the base, four sliding grooves are evenly distributed in the clamping cover, a base claw used for installing a clamping piece is movably arranged in each sliding groove, a piston is movably arranged in the base, a wedge-shaped assembly used for driving the base claws to be synchronously close to or away from the center is arranged at the top of the piston, and a spring is arranged at the bottom of the piston. One end of the spring abuts against the base, the piston synchronously drives the four base claws to be close to or away from the center of the chuck through the wedge-shaped assembly, the automatic centering function is achieved, accurate clamping of a workpiece can be guaranteed, the machining precision is improved, the piston is driven through air pressure, the workpiece can be rapidly clamped and loosened, and the working efficiency is greatly improved. And the spring is arranged at the bottom of the piston, under the action of the spring, the workpiece can be in a clamped state even if the piston is subjected to gas cut-off, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, in particular to a pneumatic chuck. Background Art

[0002] A four-jaw chuck is a gripping device used in machining, commonly used on milling machines, drilling machines, lathes, and other machine tools to secure and clamp workpieces for processing. The main components of a four-jaw chuck include a disc body, jaws, and a power mechanism. It is circular in shape, with jaws located in the center and around the perimeter of the disc body. These jaws are controlled to secure and clamp the workpiece. Four-jaw chucks are widely used in machining due to their simple structure and ease of installation and adjustment.

[0003] Traditional single-action four-jaw chucks have a relatively complicated clamping process because each jaw needs to move individually, which requires more time and effort. During the clamping process, repeated adjustments and alignment are required to ensure that each jaw can correctly clamp the workpiece. This not only wastes a lot of manpower and time, increases labor intensity, but also reduces efficiency and is not suitable for mass production environments. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a pneumatic chuck.

[0005] The purpose of the utility model can be achieved through the following technical solution: a pneumatic chuck, including a base, a card cover is fixedly provided on the base, four slide grooves are evenly distributed on the card cover, a base claw for installing a clamping member is movably provided in each slide groove, a piston is movably provided in the base, a wedge-shaped component is provided on the top of the piston for driving each base claw to synchronously move toward or away from the center, a spring is provided at the bottom of the piston, and one end of the spring abuts against the base.

[0006] Preferably, an adjustment component is provided on the base jaw.

[0007] Preferably, the adjustment assembly includes a T-shaped block for fixing the clamping member, the base jaw is provided with a T-shaped slot that is slidably matched with the T-shaped block, and saw teeth are provided on both sides of the T-shaped slot.

[0008] Preferably, the wedge assembly includes a wedge block arranged on the top of the piston, and a wedge groove cooperating with the wedge block is formed at the bottom of the base jaw.

[0009] Preferably, an oil groove is provided on the base jaw at a position in contact with the slide groove, and an oil nozzle connected to the oil groove is installed at one end of the base jaw.

[0010] Preferably, the oil groove has a wavy structure.

[0011] Preferably, a sealing strip is provided on the base jaw.

[0012] Preferably, a top cover is provided in the middle of the card cover.

[0013] The beneficial effects of the utility model are as follows: the utility model uses the wedge-shaped component to make the piston synchronously drive the four base jaws to move closer to or away from the center of the chuck, thereby realizing the function of automatic centering, ensuring the accurate clamping of the workpiece and improving the processing accuracy; the piston is driven by air pressure, which can realize rapid clamping and loosening of the workpiece, greatly improving the working efficiency; a spring is provided at the bottom of the piston, and under the action of the spring, the workpiece can be kept in a clamped state even when the piston is de-energized, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0015] Figure 1 The figure is a structural diagram of a pneumatic chuck of the utility model.

[0016] Figure 2 This is a schematic diagram of the explosion structure of a pneumatic chuck of the utility model

[0017] Figure 3 This is a schematic diagram of the base jaw structure of a pneumatic chuck of the present utility model.

[0018] The numbers shown in the figure represent: 1. base; 2. card cover; 201. slide groove; 3. base claw; 301. wedge groove; 302. oil groove; 303. oil nozzle; 304. sealing strip; 4. clamping part; 5. piston; 501. wedge block; 6. spring; 7. adjustment assembly; 701. T-block; 702. T-slot; 703. serration; 8. top cover. DETAILED DESCRIPTION

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0021] The following will be combined with specific embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] See Figures 1 to 3 As shown, the structure of the utility model is as follows: a pneumatic chuck includes a base 1, and mounting holes are provided on both sides of the base 1 for fixing the base 1 to the workbench or other positions of the machine tool. A card cover 2 is fixed on the base 1, and four slide grooves 201 are evenly distributed on the card cover 2. The four slide grooves 201 are distributed in a cross shape on the card cover 2. A base jaw 3 for mounting a clamping member 4 is movably provided in each slide groove 201. The clamping member 4 is connected and fixed to the base jaw 3 by bolts. The clamping member 4 can be replaced according to the workpiece, such as a clamping jaw, a soft jaw, a clamping jaw suitable for the workpiece, etc. Customized tooling for parts, etc., thereby improving the flexibility and precision of processing. A piston 5 is movably provided in the base 1. The top of the piston 5 is provided with a wedge component for driving each base jaw 3 to synchronously move closer to or away from the center. The direction of the force of the piston 5 is changed by the wedge component, and the vertical movement of the piston 5 is converted into horizontal movement of the base jaw 3, thereby driving the clamping member 4 to clamp or release the workpiece. A spring 6 is provided at the bottom of the piston 5, and one end of the spring 6 abuts against the base 1. Under the action of the spring 6, the workpiece can be clamped even when the piston 5 is depressurized.

[0023] like Figure 2 、 Figure 3 As shown, the base jaw 3 is provided with an adjustment assembly 7 for mounting the clamping member 4. The adjustment assembly 7 can change the mounting position of the clamping member 4 on the base jaw 3, thereby adjusting the clamping range to accommodate workpieces of different sizes.

[0024] like Figure 3 As shown, the adjustment assembly 7 includes a T-block 701, and a T-slot 702 is provided on the base jaw 3 to slide with the T-block 701. Saw teeth 703 are provided on both sides of the T-slot 702. Specifically, the clamping member 4 is connected to the T-block 701 by bolts. The position of the T-block 701 in the T-slot 702 is adjusted according to the size of the workpiece, and then the bolts are tightened. The clamping member 4 is also provided with serrations 703, which engage with the serrations 703 on the base jaw 3, thereby firmly fixing the clamping member 4 on the base jaw 3.

[0025] like Figure 2 、 Figure 3As shown, the wedge assembly includes a wedge block 501 arranged on the top of the piston 5, and a wedge groove 301 is formed at the bottom of the base jaw 3 to cooperate with the wedge block 501. Specifically, through the cooperation between the wedge block 501 and the wedge groove 301, the piston 5 moves downward, driving each base jaw 3 to move synchronously away from the center, and the piston 5 moves upward, driving each base jaw 3 to move synchronously toward the center.

[0026] like Figure 3 As shown, an oil groove 302 is provided on the base jaw 3 at a position in contact with the slide groove 201. An oil nozzle 303 connected to the oil groove 302 is installed at one end of the base jaw 3. Specifically, lubricating oil is injected into the oil groove 302 through the oil nozzle 303. When the base jaw 3 moves, the lubricating oil in the oil groove 302 contacts the inner wall of the slide groove 201, thereby reducing friction and wear between the base jaw 3 and the slide groove 201 and extending the service life of the components.

[0027] like Figure 3 As shown, the oil groove 302 has a wavy structure. Specifically, the wavy structure of the oil groove 302 can increase the contact area between the lubricating oil and the slide groove 201, thereby improving the lubrication effect.

[0028] like Figure 3 As shown, a sealing strip 304 is provided on the base jaw 3. Specifically, the sealing strip 304 can effectively prevent dust and moisture from entering the gap between the base jaw 3 and the slide groove 201, thereby avoiding affecting the clamping accuracy.

[0029] like Figure 2 As shown, a top cover 8 is provided in the middle of the chuck cover 2. Specifically, the top cover 8 is used to prevent foreign matter such as iron filings from entering the interior of the chuck.

[0030] During specific use, the base 1 is fixed to the workbench of the machine tool through the mounting hole, and then compressed air is turned on. The appropriate clamping part 4 is selected and replaced according to the workpiece, and installed on the base jaw 3 through bolts. The workpiece is placed on the clamping part 4, and then the piston 5 is driven to move by compressed air. Under the action of the wedge assembly, the direction of the force of the piston 5 is changed, and the vertical movement of the piston 5 is converted into the horizontal movement of the base jaw 3, thereby driving the clamping part 4 to clamp or release the workpiece. A spring 6 is provided at the bottom of the piston 5, and one end of the spring 6 abuts against the base 1. Under the action of the spring 6, the workpiece can be clamped even when the piston 5 is de-energized.

[0031] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A pneumatic chuck, characterized in that: The invention comprises a base (1), a card cover (2) is fixedly provided on the base (1), four slide grooves (201) are evenly distributed on the card cover (2), a base claw (3) for installing a clamping member (4) is movably provided in each of the slide grooves (201), a piston (5) is movably provided in the base (1), a wedge-shaped component for driving each base claw (3) to synchronously move toward or away from the center is provided on the top of the piston (5), a spring (6) is provided at the bottom of the piston (5), and one end of the spring (6) is in contact with the base (1).

2. A pneumatic chuck according to claim 1, characterized in that: An adjustment component (7) is provided on the base claw (3).

3. The pneumatic chuck according to claim 2, characterized in that: The adjusting assembly (7) comprises a T-shaped block (701) for fixing the clamping member (4); the base jaw (3) is provided with a T-shaped slot (702) that slidably cooperates with the T-shaped block (701); and saw teeth (703) are provided on both sides of the T-shaped slot (702).

4. The pneumatic chuck according to claim 1, characterized in that: The wedge assembly comprises a wedge block (501) arranged on the top of the piston (5), and a wedge groove (301) is provided at the bottom of the base claw (3) to cooperate with the wedge block (501).

5. The pneumatic chuck according to claim 1, characterized in that: An oil groove (302) is provided on the base claw (3) at a position in contact with the slide groove (201), and an oil nozzle (303) communicating with the oil groove (302) is installed at one end of the base claw (3).

6. The pneumatic chuck according to claim 5, characterized in that: The oil groove (302) has a wave-shaped structure.

7. The pneumatic chuck according to claim 1, characterized in that: A sealing strip (304) is provided on the base claw (3).

8. The pneumatic chuck according to claim 1, characterized in that: A top cover (8) is provided in the middle of the card cover (2).

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