A three jaw chuck

Abstract

The present application provides a kind of three-jaw chuck, it relates to machining fixture technical field, the three-jaw chuck includes chuck body, three clamping jaws of chuck body are installed and can move along the radial direction of chuck body, the clamping jaw is by first clamping block, second clamping block and third clamping block, adjusting device for adjusting the relative position of first clamping block, second clamping block and third clamping block is installed in the clamping jaw;The relative position of first clamping block, second clamping block and third clamping block is adjusted by adjusting device, so that when clamping disc-shaped workpiece, the side of workpiece is resisted on second clamping block or third clamping block, so as to avoid the deflection of workpiece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining clamps, in particular to a three-jaw chuck. BACKGROUND

[0002] The three-jaw chuck, also known as three-jaw self-centering chuck, is usually used as a machine tool accessory, which uses the radial movement of three clamps evenly distributed on the chuck body to clamp and position the workpiece, and the rotation center of the workpiece can be determined according to the circumference of the clamped part of the workpiece.

[0003] However, when the existing three-jaw chuck clamps the disc-shaped workpiece, it is not convenient to process because the workpiece is thin and the side of the workpiece is in contact with the surface of the chuck. SUMMARY

[0004] The purpose of the present application is to provide a three-jaw chuck to solve the problems in the prior art.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: the three-jaw chuck comprises a chuck body, three clamps are installed on the chuck body and can move radially along the chuck body, the clamps are composed of a first clamp block, a second clamp block and a third clamp block, and an adjusting device is installed in the clamp for adjusting the relative positions of the first clamp block, the second clamp block and the third clamp block.

[0006] The further technical scheme of the present application is that the adjusting device comprises a first adjusting device for adjusting the relative positions between the first clamp block and the second clamp block, and a second adjusting device for adjusting the relative positions between the second clamp block and the third clamp block.

[0007] The further technical scheme of the present application is that the first clamp block is slidingly installed on the second clamp block, the first adjusting device comprises a first screw rod rotatingly installed on the second clamp block, and the first screw rod is threadedly connected with the first clamp block.

[0008] The further technical scheme of the present application is that the second clamp block is slidingly installed on the third clamp block, the first adjusting device comprises a second screw rod rotatingly installed on the third clamp block, and the second screw rod is threadedly connected with the second clamp block.

[0009] In order to make the present application have the function of synchronously moving the first clamp block and the second clamp block, the further technical scheme of the present application is that one end of the second screw rod is provided with a driving head, and a transmission assembly is installed between the first screw rod and the second screw rod.

[0010] The further technical scheme of the present application is that the transmission assembly comprises a driving gear rotatably installed in the second clamping block, the second screw rod is provided with a sliding groove along the length direction of the second screw rod, the inner hole of the driving gear is provided with a sliding block which can slide in the sliding groove, and the gear set is installed between the driving gear and the first screw rod.

[0011] In order to increase the friction when clamping the disc-shaped workpiece, the further technical scheme of the present application is that the second clamping block and the third clamping block are provided with support rods which are used to abut against the workpiece, the second clamping block and the third clamping block are provided with a pushing structure, when the second clamping block and the third clamping block slide to the outermost end, a part of the support rod protrudes from the upper surface of the second clamping block and the third clamping block, and a part of the support rod is provided with anti-skid rubber.

[0012] The pushing structure comprises a sliding block provided at the bottom of the second clamping block and the third clamping block, one end of the support rod is rotatably installed on the second clamping block or the third clamping block, a part of the support rod close to the hinge protrudes upward, and a part of the support rod away from the hinge can abut against the sliding block.

[0013] The present application has the following beneficial effects:

[0014] 1. When the present application is used, the relative positions of the first clamping block, the second clamping block and the third clamping block are adjusted by the adjusting device, so that when the disc-shaped workpiece is clamped, one side of the workpiece abuts against the second clamping block or the third clamping block, thereby avoiding the deflection of the workpiece.

[0015] 2. When the present application is used, the first clamping block and the second clamping block are moved by the two screw rods and the transmission assembly between the two screw rods, when the first clamping block and the second clamping block move to the outermost end, a part of the support rod moves out of the upper surface of the second clamping block and the third clamping block, so that the anti-skid rubber abuts against the workpiece, thereby increasing the friction force suffered by the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of a specific embodiment of the present application.

[0017] Figure 2 is a structural schematic view of another form of a specific embodiment of the present application.

[0018] Figure 3 is a structural schematic view of a clamping block in a specific embodiment of the present application.

[0019] Figure 4 is a sectional view of a clamping block in a specific embodiment of the present application.

[0020] Figure 5 is a structural schematic view of a support rod in a specific embodiment of the present application.

[0021] In the figure: 1, chuck body; 2, clamping jaw; 21, first clamping block; 22, second clamping block; 23, third clamping block; 3, adjusting device; 31, first adjusting device; 32, second adjusting device; 33, driving head; 34, transmission assembly; 341, driving gear; 342, gear set; 4, support rod; 5, pushing structure. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be further described below with reference to the accompanying drawings.

[0023] As Figures 1-2 shown, a three-jaw chuck, comprising a chuck body 1, three clamping jaws 2 are installed on the chuck body 1 and can move radially along the chuck body 1, the clamping jaw 2 is composed of a first clamping block 21, a second clamping block 22 and a third clamping block 23, and the clamping jaw 2 is provided with an adjusting device 3 for adjusting the relative positions of the first clamping block 21, the second clamping block 22 and the third clamping block 23.

[0024] In this specific embodiment, the relative positions of the first clamping block 21, the second clamping block 22 and the third clamping block 23 are adjusted by the adjusting device 3, so that when clamping a disc-shaped workpiece, one side of the workpiece is pressed against the second clamping block 22 or the third clamping block 23, thereby avoiding deflection of the workpiece.

[0025] Specifically, the adjusting device comprises a first adjusting device 31 for adjusting the relative position between the first clamping block 21 and the second clamping block 22, and a second adjusting device 32 for adjusting the relative position between the second clamping block 22 and the third clamping block 23.

[0026] Specifically, the first clamping block 21 is slidingly installed on the second clamping block 22, and the first adjusting device 31 comprises a first screw rod rotatingly installed on the second clamping block 22, the first screw rod being in threaded connection with the first clamping block 21.

[0027] Specifically, the second clamping block 22 is slidingly installed on the third clamping block 23, and the first adjusting device 31 comprises a second screw rod rotatingly installed on the third clamping block 23, the second screw rod being in threaded connection with the second clamping block 22, and the first clamping block 21 and the second clamping block 22 are moved by rotating the screw rod.

[0028] Further, one end of the second screw rod is provided with a driving head 33, and a transmission assembly 34 is installed between the first screw rod and the second screw rod, and the driving head 33 is rotated by using a wrench, so as to rotate the screw rod.

[0029] Specifically, the transmission assembly 34 comprises a driving gear 341 rotatably installed in the second clamping block 22, a sliding groove is formed in the second screw along the length direction of the second screw, a sliding block capable of sliding in the sliding groove is arranged in the inner hole of the driving gear 341, and the gear set 342 is arranged between the driving gear 341 and the first screw. When the second screw rotates, the second clamping block 22 moves, and at the same time, the driving gear 341 rotates, so that the first screw rotates through the gear set 342, thereby enabling the first clamping block 21 and the second clamping block 22 to move simultaneously.

[0030] Specifically, the second clamping block 22 and the third clamping block 23 are each provided with a support rod 4 for abutting against the workpiece, and the second clamping block 22 and the third clamping block 23 are provided with a pushing structure 5. When the second clamping block 22 and the third clamping block 23 slide to the outermost end, a part of the support rod 4 protrudes above the upper surface of the second clamping block 22 and the third clamping block 23, and a part of the support rod 4 is provided with an anti-skid rubber.

[0031] Specifically, the pushing structure 5 comprises a sliding block arranged at the bottom of the second clamping block 22 and the third clamping block 23, one end of the support rod 4 is rotatably installed on the second clamping block 22 or the third clamping block 23, a part of the support rod 4 close to the hinge protrudes upward, and a part of the support rod 4 away from the hinge can abut against the sliding block. The two screws and the transmission assembly 34 between the two screws enable the first clamping block 21 and the second clamping block 22 to move. When the first clamping block 21 and the second clamping block 22 move to the outermost end, a part of the support rod 4 away from the hinge abuts against the sliding block, so that the support rod 4 rotates, a part of the support rod 4 moves out of the upper surface of the second clamping block 22 and the third clamping block 23, thereby enabling the anti-skid rubber to abut against the workpiece and increasing the friction force received by the workpiece.

[0032] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in any respect, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A three jaw chuck, characterized in that, The chuck body (1) is provided with three clamping jaws (2) which can move radially on the chuck body (1), the clamping jaw (2) is composed of a first clamping block (21), a second clamping block (22) and a third clamping block (23), the clamping jaw (2) is provided with an adjusting device (3) for adjusting the relative positions of the first clamping block (21), the second clamping block (22) and the third clamping block (23), the second clamping block (22) and the third clamping block (23) are provided with a support rod (4) for abutting against a workpiece, the second clamping block (22) and the third clamping block (23) are provided with a pushing structure (5), when the second clamping block (22) and the third clamping block (23) slide to the outermost end, a part of the support rod (4) protrudes above the second clamping block (22) and the third clamping block (23), and a part of the support rod (4) is provided with an anti-skid rubber, the pushing structure (5) includes a sliding block arranged at the bottom of the second clamping block (22) and the third clamping block (23), one end of the support rod (4) is rotatably arranged on the second clamping block (22) or the third clamping block (23), a part of the support rod (4) close to the hinge protrudes upward, and a part of the support rod (4) away from the hinge can abut against the sliding block.

2. The three-jaw chuck according to claim 1, characterized in that The adjusting device includes a first adjusting device (31) for adjusting the relative positions of the first clamping block (21) and the second clamping block (22), and a second adjusting device (32) for adjusting the relative positions of the second clamping block (22) and the third clamping block (23).

3. The three jaw chuck according to claim 2, wherein The first clamping block (21) is slidably arranged on the second clamping block (22), the first adjusting device (31) includes a first screw rod rotatably arranged on the second clamping block (22), and the first screw rod is threadedly connected with the first clamping block (21).

4. The three jaw chuck according to claim 3, wherein The second clamping block (22) is slidably arranged on the third clamping block (23), the first adjusting device (31) includes a second screw rod rotatably arranged on the third clamping block (23), and the second screw rod is threadedly connected with the second clamping block (22).

5. The three jaw chuck according to claim 4, wherein One end of the second screw rod is provided with a driving head (33), and a transmission assembly (34) is arranged between the first screw rod and the second screw rod.

6. The three jaw chuck according to claim 5, wherein The transmission assembly (34) includes a driving gear (341) rotatably arranged in the second clamping block (22), a sliding groove is formed in the second screw rod along the length direction of the second screw rod, a sliding block which can slide in the sliding groove is arranged in the inner hole of the driving gear (341), and a gear set (342) is arranged between the driving gear (341) and the first screw rod.

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