A built-in hollow hydraulic chuck

Abstract

The utility model relates to the technical field of chucks, in particular to a built-in hollow oil pressure chuck, comprising a chuck body and a clamping claw, the clamping claw is slidably arranged on the chuck body, and an extension portion is provided at the lower end of the clamping claw. The oil pressure chuck also includes a coaxially arranged pulling disc, a piston disc, a dust cover, an upper top plate and a bottom plate; the bottom plate is fixedly arranged at the lower end of the chuck body, the upper top plate is fixedly arranged at the inner side of the chuck body, the piston disc is slidably arranged between the upper top plate and the bottom plate, the pulling disc is arranged at the upper side of the upper top plate and the lower end of the pulling disc is fixedly connected to the piston disc; the dust cover is composed of a cover body and a dustproof tube, and the dustproof tube runs through the pulling disc, the piston disc, the upper top plate and the bottom plate; the pulling disc is provided with an inclined groove; the extension portion of the clamping claw is in clearance with the inclined groove; the oil pressure chuck also includes a diverter valve; the upper and lower side spaces of the piston disc are both connected to the diverter valve. The utility model can make the oil pressure chuck structure more compact, and applying the oil pressure chuck to machine tool processing will increase the processing range of the machine tool.

Description

Technical Field

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

[0002] Hydraulic chuck is a clamp controlled by hydraulic system, which is widely used to clamp workpieces on CNC lathe spindles. It has the advantages of automatic clamping, labor saving, safety and economy. When the existing hydraulic chuck is used vertically, the chuck is connected to the machine tool spindle through the fixture plate. After adding the fixture plate, the height of the entire chuck and the fixture plate is too high, which affects the processing range. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a built-in hollow hydraulic chuck, which can make the hydraulic chuck structure more compact. Applying the hydraulic chuck to machine tool processing will increase the processing range of the machine tool.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a built-in hollow oil pressure chuck, comprising a chuck body and a claw, the claw is slidably arranged on the chuck body, and an extension portion is provided at the lower end of the claw. The oil pressure chuck also includes a coaxially arranged pulling plate, a piston plate, a dust cover, an upper top plate and a bottom plate; the bottom plate is fixedly arranged at the lower end of the chuck body, the upper top plate is fixedly arranged on the inner side of the chuck body, the piston plate is slidably arranged between the upper top plate and the bottom plate, the pulling plate is arranged on the upper side of the upper top plate and the lower end of the pulling plate is fixedly connected to the piston plate; the dust cover is composed of a cover body and a dustproof tube, the cover body is fixedly connected to the chuck body, and the dustproof tube runs through the pulling plate, the piston plate, the upper top plate and the bottom plate; the pulling plate is provided with an inclined groove; the extension portion of the claw is clearance-matched with the inclined groove; the oil pressure chuck also includes a diverter valve; the upper and lower spaces of the piston plate are both connected to the diverter valve.

[0005] Preferably, the pull plate is composed of a pull plate body and a connecting pipe; the inclined groove is located on the pull plate body; the connecting pipe passes through the upper top plate and is fixedly connected to the piston plate.

[0006] Preferably, the piston disc is slidably connected to the inner wall of the chuck body.

[0007] Preferably, a sealing ring is provided between the piston disc and the chuck body.

[0008] Preferably, the outer periphery of the dustproof tube is seamlessly connected to the pull plate, the upper top plate, the piston plate and the bottom plate.

[0009] Preferably, the outer diameter of the bottom plate is larger than the outer diameter of the chuck body; and a U-shaped groove is provided on the outer edge of the bottom plate.

[0010] Preferably, there are a plurality of U-shaped grooves, and the plurality of U-shaped grooves are evenly distributed around the axis of the bottom plate.

[0011] Preferably, the clamping claw comprises a lower claw, an upper claw and a T-block; the upper claw is fixed on the lower claw via the T-block.

[0012] Preferably, the contact surfaces of the lower claw and the upper claw are both provided with comb teeth that mesh with each other.

[0013] Preferably, the hydraulic chuck further comprises an upper cover; the upper cover is arranged on the cover body.

[0014] Compared with the prior art, the beneficial effect of the utility model is as follows: the bottom plate is fixedly arranged on the lower end of the chuck body, the upper top plate is fixedly arranged inside the chuck body to form a cylinder body, the piston disc is arranged in the cylinder body, the pulling disc is arranged on the upper side of the upper top plate and the lower end of the pulling disc is fixedly connected to the piston disc, so that part of the cylinder is hidden inside the chuck, and finally the overall height of the hydraulic chuck is reduced and the structure is compact. Applying the hydraulic chuck to machine tool processing will increase the processing range of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional exploded view of the hydraulic chuck;

[0016] Figure 2 This is the overall schematic diagram of the hydraulic chuck;

[0017] Figure 3 It is a schematic diagram of the longitudinal section of the hydraulic chuck.

[0018] In the figure: 1 chuck body, 2 pull plate, 3 lower jaw, 4 upper jaw, 5 T-block, 6 piston plate, 7 dust cover, 8 diverter valve, 9 upper top plate, 10 bottom plate, 11 oil nozzle, 12 upper cover, 101 U-shaped groove. DETAILED DESCRIPTION

[0019] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0020] Specific embodiment 1: Please refer to Figure 1-3 A built-in hollow hydraulic chuck, comprising:

[0021] The chuck body 1 is a cover-like structure with three slide grooves on the upper end;

[0022] The clamping claw comprises a lower claw 3, an upper claw 4 and a T-block 5. The upper claw 4 is fixed on the lower claw 3 through the T-block 5. Specifically, a mounting groove is provided on the upper part of the lower claw 3 to match the clearance of the T-block 5. The mounting groove is provided along the length direction of the lower claw 3. The T-block 5 can slide back and forth along the opening direction of the mounting groove. The upper claw 4 and the T-block 5 are fixedly connected by screws. In addition, in order to increase the friction force, the contact surfaces of the lower claw 3 and the upper claw 4 are provided with comb teeth that mesh with each other; the lower end of the lower claw 3 is provided with an extension; further, the clamping claw is provided with three groups, and the three groups of clamping claws are provided corresponding to the three slide grooves;

[0023] A jaw driving assembly, the jaw driving assembly comprises a coaxially arranged pulling disc 2, a piston disc 6, a dust cover 7, an upper top plate 9 and a bottom plate 10, wherein the bottom plate 10 is fixedly arranged at the lower end of the chuck body 1, the pulling disc 2, the piston disc 6 and the upper top plate 9 are all arranged on the inner side of the chuck body 1, wherein the upper top plate 9 is fixedly connected to the top wall of the chuck body 1 by screws, and the piston disc 6 is movably arranged between the upper top plate 9 and the bottom plate 10, and it can be understood that the outer edge of the piston disc 6 is slidably connected to the inner side wall of the chuck body 1; for sealing, a sealing ring is also arranged between the piston disc 6 and the inner side wall of the chuck body 1; for easy installation, the outer diameter of the bottom plate 10 is larger than the outer diameter of the chuck body 1, and two symmetrically distributed U-shaped grooves 101 are also provided on the outer edge of the bottom plate 10;

[0024] The pull plate 2 is composed of a pull plate body and a connecting tube. The pull plate body is provided with three inclined grooves inclined toward the axis of the pull plate body. The three inclined grooves are evenly distributed around the axis of the pull plate body. The connecting tube is provided at the lower end of the pull plate body. The extensions at the lower ends of the three lower claws 3 are correspondingly matched with the clearances of the three inclined grooves.

[0025] The pull plate body is arranged on the upper side of the upper top plate 9, and the connecting pipe penetrates the upper top plate 9 and is fixedly connected to the piston plate 6. For sealing, a sealing ring is also arranged between the connecting pipe and the upper top plate 9.

[0026] The dust cover 7 is composed of a cover body and a dustproof tube. The cover body is fixedly connected to the chuck body 1 by screws. The dustproof tube longitudinally passes through the pull plate 2, the upper top plate 9, the piston plate 6 and the bottom plate 10 in sequence. For sealing and dust prevention, the outer periphery of the dustproof tube is seamlessly connected to the pull plate 2, the upper top plate 9, the piston plate 6 and the bottom plate 10.

[0027] The chuck driving assembly further includes a diverter valve 8, which is fixed to the bottom plate 10; two flow channels are opened on the bottom plate 10 and the chuck body 1, the head ends of the two flow channels are both connected to the diverter valve 8, and the tail ends of the two flow channels are connected to the upper space of the piston disc 6, and the other is connected to the lower space of the piston disc 6;

[0028] The oil nozzle 11 and the upper cover 12, wherein three oil nozzles 11 are provided, and the three oil nozzles 11 are provided correspondingly to the three claws; the upper cover 12 is provided on the cover body to close the upper end of the dustproof pipe.

[0029] The working principle of the hydraulic chuck is to provide clamping force through a hydraulic system. By injecting hydraulic oil into the upper and lower spaces of the piston disc 6, the piston disc 6 can be displaced up and down. Driven by the piston disc 6, the pulling disc 2 can be displaced axially, and the inclined groove of the pulling disc 2 squeezes the extension of the lower end of the lower claw 3, and finally the three groups of jaws are radially brought together or separated on the chuck body, realizing the clamping or releasing action.

[0030] In order to solve the problem of rust and corrosion prevention, the entire hydraulic chuck is nickel-plated.

[0031] Through the technical solution, the bottom plate is fixed to the lower end of the chuck body, the upper plate is fixed to the chuck body to form a cylinder body, the piston disc is arranged in the cylinder body, the pulling plate is arranged on the upper side of the upper plate and the lower end of the pulling plate is fixedly connected to the piston disc, so that part of the cylinder is hidden inside the chuck, and finally the overall height of the hydraulic chuck is reduced and the structure is compact. Applying the hydraulic chuck to machine tool processing will increase the processing range of the machine tool.

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

Claims

1. A built-in hollow hydraulic chuck, comprising a chuck body (1) and a clamping jaw, wherein the clamping jaw is slidably arranged on the chuck body (1), and an extension portion is arranged at the lower end of the clamping jaw, characterized in that: The hydraulic chuck further comprises a coaxially arranged pull plate (2), a piston plate (6), a dust cover (7), an upper top plate (9) and a bottom plate (10); the bottom plate (10) is fixedly arranged at the lower end of the chuck body (1), the upper top plate (9) is fixedly arranged at the inner side of the chuck body (1), the piston plate (6) is slidably arranged between the upper top plate (9) and the bottom plate (10), the pull plate (2) is arranged at the upper side of the upper top plate (9) and the lower end of the pull plate (2) is fixedly connected to the piston plate (6); the dust cover (7) is composed of a cover body and a dustproof tube, the cover body is fixedly connected to the chuck body (1), and the dustproof tube passes through the pull plate (2), the piston plate (6), the upper top plate (9) and the bottom plate (10); the pull plate (2) is provided with an inclined groove; the extension portion of the clamping claw is in clearance fit with the inclined groove; the hydraulic chuck further comprises a diverter valve (8); the upper and lower spaces of the piston plate (6) are both connected to the diverter valve (8).

2. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The pull plate (2) is composed of a pull plate body and a connecting pipe; the inclined groove is located on the pull plate body; the connecting pipe passes through the upper top plate (9) and is fixedly connected to the piston plate (6).

3. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The piston disc (6) is slidably connected to the inner wall of the chuck body (1).

4. The built-in hollow hydraulic chuck according to claim 1, characterized in that: A sealing ring is provided between the piston disc (6) and the chuck body (1).

5. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The outer periphery of the dustproof tube is seamlessly connected to the pull plate (2), the upper top plate (9), the piston plate (6) and the bottom plate (10).

6. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The outer diameter of the bottom plate (10) is greater than the outer diameter of the chuck body (1); and a U-shaped groove is provided on the outer edge of the bottom plate (10).

7. The built-in hollow hydraulic chuck according to claim 6, characterized in that: A plurality of U-shaped grooves are provided; the plurality of U-shaped grooves are evenly distributed around the axis of the bottom plate (10).

8. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The clamping claw comprises a lower claw (3), an upper claw (4) and a T-shaped block (5); the upper claw (4) is fixed on the lower claw (3) via the T-shaped block (5).

9. The built-in hollow hydraulic chuck according to claim 8, characterized in that: The contact surfaces of the lower claw (3) and the upper claw (4) are both provided with comb teeth that mesh with each other.

10. The built-in hollow hydraulic chuck according to claim 1, characterized in that: The hydraulic chuck further comprises an upper cover (12); the upper cover (12) is arranged on the cover body.

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