Machine tool chuck jaw

Abstract

The utility model relates to the technical field of chuck jaws, and discloses a machine tool chuck jaw which comprises a fixed base, a handle is rotationally connected in the fixed base, a worm is fixedly connected to the outer wall of the handle, a worm gear is rotationally connected in the fixed base, the worm is meshed with the worm gear, and the worm gear is fixedly connected with the outer wall of the handle. An annular groove is formed in the top of the worm gear, a limiting assembly is arranged in the worm gear and used for stabilizing rotation of the worm gear, and a sliding plate is slidably connected to the top of the worm gear. According to the utility model, the problems that the centering and clamping stability of a workpiece is influenced due to the fact that the positions of the clamping jaws are difficult to be completely synchronized, and the friction force is insufficient and the clamping is unstable due to small contact area are solved, and stable fixation can be realized to ensure that the workpiece does not move or deviate from a preset position in the machining process; and meanwhile, the design of the contact surface is optimized, and the friction force and the clamping force can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chuck jaws, in particular to a machine tool chuck jaw. Background Art

[0002] A machine tool is a mechanical device used to process various workpieces. By means of cutting, grinding, milling, drilling, etc., it can change the shape, size or surface characteristics of the workpiece, and is a key processing tool in the manufacturing industry. A machine tool chuck jaw is a core component on the machine tool for clamping the workpiece. Its main function is to firmly fix the workpiece on the spindle or workbench of the machine tool to ensure that the workpiece does not move or deviate during the processing, thereby ensuring the machining accuracy and stability. Using a chuck jaw can not only improve the positioning accuracy and processing efficiency of the workpiece, but also increase the operation safety, enabling workpieces with complex shapes and different materials to be stably processed at high torque and high speed, which is an important guarantee for realizing precision machining and mass production.

[0003] When using traditional machine tool chuck jaws, the driving mechanism of the chuck is usually operated manually or mechanically to make the jaws move radially to clamp and fix the workpiece. The operation steps generally include first placing the workpiece in the chuck, and then using a wrench or handle to rotate the chuck to synchronously tighten the jaws inward to firmly clamp the workpiece at the center position of the chuck. The three-jaw self-centering chuck is the most common, which automatically centers by the synchronous movement of three equally spaced jaws and is suitable for clamping circular and symmetric workpieces. The four-jaw independent chuck allows each jaw to be independently adjusted in position and is suitable for workpieces with irregular shapes. Traditional chuck jaws are simple to operate and have a large clamping force, but they require manual adjustment and locking and are suitable for various types of machining.

[0004] Traditional machine tool chuck jaws usually adopt a mechanical structure, which is easily affected by manufacturing accuracy, wear and clearance, resulting in difficult-to-fully-synchronize jaw positions, thereby affecting the centering and clamping stability of the workpiece. At the same time, the contact area is small, resulting in insufficient friction and unstable clamping. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a machine tool chuck jaw, aiming to improve the problem that the positions of traditional machine tool chuck jaws are difficult to be fully synchronized, which in turn affects the centering and clamping stability of the workpiece, and at the same time, the contact area is small, resulting in insufficient friction and unstable clamping.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A chuck jaw of a machine tool, comprising a fixed base, inside which a handle is rotatably connected. An external wall of the handle is fixedly connected with a worm, and inside the fixed base, a worm gear is rotatably connected. The worm is meshed with the worm gear. An annular groove is formed at the top of the worm gear, and a limiting component is arranged inside the worm gear for stabilizing the rotation of the worm gear. A slide plate is slidably connected to the top of the worm gear, and a fixed jaw is fixedly connected to an upper surface of the slide plate. The slide plate is meshed with the annular groove. An extension jaw is arranged above the fixed jaw, and a rotating seat is rotatably connected inside the extension jaw. An external wall of the rotating seat is fixedly connected with a telescopic rod, and a spring is sleeved on an external wall of the telescopic rod. The other ends of the springs are fixedly connected to the external wall of the rotating seat. On one side of the external wall of the rotating seat, a fitting plate is rotatably connected, and an external wall of the fitting plate is rotatably connected inside the extension jaw. A chute is formed inside the fixed base.

[0007] Further, the limiting component includes a fixed ring, an external wall of which is fixedly connected inside the worm gear. A limiting wheel is slidably connected to an inner wall of the fixed ring, and an external wall of the limiting wheel is rotatably connected inside the fixed base.

[0008] Further, an extension plate is slidably connected inside the fixed jaw, and a top of the extension plate is fixedly connected to a lower surface of the extension jaw.

[0009] Further, a limiting groove is formed inside the extension plate, and a fixed block is slidably connected inside the extension plate.

[0010] Further, an external wall of the fixed block is fixedly connected to an external wall of the fixed jaw, and alloy fitting blocks are fixedly connected to external walls of the fixed jaw and the extension jaw.

[0011] Further, a bearing is fixedly connected inside the fixed block, and a bidirectional screw rod is fixedly connected to an inner wall of the bearing.

[0012] Further, an external wall of the bidirectional screw rod is rotatably connected inside the fixed block, and a clamping block is threadedly connected to the external wall of the bidirectional screw rod. An external wall of the clamping block is slidably connected inside the fixed block and the fixed jaw.

[0013] Further, handles are fixedly connected to both ends of the bidirectional screw rod, and a limiting plate is fixedly connected to an external wall of the clamping block. An external wall of the limiting plate is slidably connected inside the fixed block.

[0014] The present utility model has the following beneficial effects:

[0015] 1. In the present utility model, first, the driving handle drives the worm to rotate inside the fixed base, and then, in cooperation with the worm wheel, annular groove, fixed ring, limit wheel, slide plate and fixed claw, the extension claw drives to stably clamp the workpiece. Then, in cooperation with the rotating seat, telescopic rod and spring, the fitting plate further fits with the workpiece, solving the problem that the positions of the clamping claws are difficult to be completely synchronized, which in turn affects the centering and clamping stability of the workpiece. At the same time, the contact area is small, resulting in insufficient frictional force and unstable clamping. It achieves stable fixation, which can ensure that the workpiece will not move or deviate from the predetermined position during the machining process, thus ensuring that the relative position between the tool and the workpiece is precisely consistent. At the same time, by optimizing the design of the contact surface, the frictional force and clamping force can be significantly improved.

[0016] 2. In the present utility model, first, the driving handle drives the bidirectional screw to rotate inside the fixed block in cooperation with the bearing, and then, in cooperation with the limit plate, drives the clamping block to slide inside the fixed block and the limit groove, thereby achieving the adjustment of the height of the clamping claw, which can be flexibly adjusted according to the specific size and shape of the workpiece, enabling the chuck to better clamp diversified workpieces, and expanding the machining range, ability and stability of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a chuck jaw of a machine tool proposed by the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the fixed base of a chuck jaw of a machine tool proposed by the present utility model;

[0019] Figure 3 is a schematic diagram of the structure on one side of the worm wheel of a chuck jaw of a machine tool proposed by the present utility model;

[0020] Figure 4 is a schematic diagram of the structure on one side of the extension claw of a chuck jaw of a machine tool proposed by the present utility model;

[0021] Figure 5 is a schematic diagram of the internal structure of the fixed claw of a chuck jaw of a machine tool proposed by the present utility model;

[0022] Figure 6 is a schematic diagram of the internal structure of the fixed block of a chuck jaw of a machine tool proposed by the present utility model.

[0023] LEGEND DESCRIPTION:

[0024] 1. Fixed base; 2. Handle; 3. Worm; 4. Worm gear; 5. Annular groove; 6. Fixed ring; 7. Limiting wheel; 8. Slide plate; 9. Fixed claw; 10. Extension claw; 11. Rotating seat; 12. Telescopic rod; 13. Spring; 14. Fitting plate; 15. Extension plate; 16. Limiting groove; 17. Fixed block; 18. Bearing; 19. Bi-directional screw; 20. Block; 21. Limiting plate; 22. Handle; 23. Alloy fitting block; 24. Slide groove. Detailed implementation manner

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Refer to Figure 1 - Figure 4 As shown in, an embodiment provided by the present invention: A chuck jaw of a machine tool includes a fixed base 1. A handle 2 is rotatably connected inside the fixed base 1. A worm 3 is fixedly connected to the outer wall of the handle 2. A worm gear 4 is rotatably connected inside the fixed base 1. The worm 3 meshes with the worm gear 4. An annular groove 5 is opened at the top of the worm gear 4. A limiting component is arranged inside the worm gear 4. The limiting component is used to stabilize the rotation of the worm gear 4. A slide plate 8 is slidably connected to the top of the worm gear 4. A fixed claw 9 is fixedly connected to the upper surface of the slide plate 8. The slide plate 8 meshes with the annular groove 5. An extension claw 10 is arranged above the fixed claw 9. A rotating seat 11 is rotatably connected inside the extension claw 10. A telescopic rod 12 is fixedly connected to the outer wall of the rotating seat 11. A spring 13 is sleeved on the outer wall of the telescopic rod 12. The other ends of the springs 13 are fixedly connected to the outer wall of the rotating seat 11. One side of the outer wall of the rotating seat 11 is rotatably connected to a fitting plate 14. The outer wall of the fitting plate 14 is rotatably connected inside the extension claw 10. A slide groove 24 is opened inside the fixed base 1. The limiting component includes a fixed ring 6. The outer wall of the fixed ring 6 is fixedly connected inside the worm gear 4. A limiting wheel 7 is slidably connected to the inner wall of the fixed ring 6. The outer wall of the limiting wheel 7 is rotatably connected inside the fixed base 1;

[0027] Specifically, first place the workpiece on the upper surface of the fixed base 1, then drive the handle 2. The handle 2 drives the worm 3 inside the fixed base 1. Then, through the meshing of the worm 3 and the worm wheel 4, the worm wheel 4 rotates as the worm 3 rotates. At the same time, the rotation of the worm wheel 4 drives the internal fixed ring 6 to slide on the outer wall of the limiting wheel 7, making the rotation of the worm wheel 4 more stable. Then, through the meshing relationship between the annular groove 5 and the slide plate 8, the slide plate 8 slides in the preset chute 24 inside the fixed base 1 as the worm wheel 4 rotates, thereby driving the upper fixed claw 9 to move. Then, the workpiece is clamped and fixed by the movement of the three fixed claws 9 above the fixed base 1. During this process, when the fitting plate 14 is in contact with the workpiece, the fitting plate 14 will be affected by the outer wall of the workpiece and rotate inside the extension claw 10, causing the spring 13 to contract between the two rotating seats 11. When the fitting plate 14 rotates to a certain angle, the two ends of the fitting plate 14 can be attached to the outer wall of the workpiece. Then, the thrust generated when the spring 13 contracts pushes the fitting plate 14 to fit tightly with the workpiece. It is best to cooperate with the alloy fitting blocks 23 on the outer walls of the fixed claw 9 and the extension claw 10 to increase the friction force, achieving stable fixation of the workpiece.

[0028] Refer to Figure 1 、 Figure 5 and Figure 6 , a extension plate 15 is slidably connected inside the fixed claw 9. The top of the extension plate 15 is fixedly connected to the lower surface of the extension claw 10. A limiting groove 16 is opened inside the extension plate 15. A fixed block 17 is slidably connected inside the extension plate 15. The outer wall of the fixed block 17 is fixedly connected to the outer wall of the fixed claw 9. Alloy fitting blocks 23 are fixedly connected to the outer walls of the fixed claw 9 and the extension claw 10. A bearing 18 is fixedly connected inside the fixed block 17. The inner wall of the bearing 18 is fixedly connected to a bidirectional screw 19. The outer wall of the bidirectional screw 19 is rotatably connected inside the fixed block 17. A clamping block 20 is threadedly connected to the outer wall of the bidirectional screw 19. The outer wall of the clamping block 20 is slidably connected inside the fixed block 17 and the fixed claw 9. Handles 22 are fixedly connected to both ends of the bidirectional screw 19. A limiting plate 21 is fixedly connected to the outer wall of the clamping block 20. The outer wall of the limiting plate 21 is slidably connected inside the fixed block 17;

[0029] Specifically, drive the handle 22 to drive the bidirectional screw 19 to rotate inside the fixed block 17. During this process, the bearing 18 makes the rotation of the bidirectional screw 19 more stable. Then, due to the threaded relationship between the bidirectional screw 19 and the clamping block 20, the clamping block 20 slides inside the fixed block 17 and the limit groove 16 as the bidirectional screw 19 rotates. During this process, the limit plate 21 can be used for limiting. When the clamping block 20 completely moves into the fixed block 17, the extension claw 10 can be pulled to drive the extension plate 15 to slide inside the fixed claw 9. After the extension claw 10 moves to a certain position, the handle 22 can be rotated in the reverse direction to drive the clamping block 20 to move back into the preset limit groove 16 inside the extension plate 15, achieving the fixation of the extension claw 10 and reaching the effect of adjusting the height of the extension claw 10.

[0030] Working principle: When the machine tool chuck jaw needs to be used, first drive the handle 2. The handle 2 drives the worm 3 to rotate inside the fixed base 1, driving the worm wheel 4 to rotate. At the same time, the fixed ring 6 slides on the outer wall of the limit wheel 7 to ensure the stable rotation of the worm wheel 4. Thus, the slide plate 8 rotates with the worm wheel 4 and slides inside the fixed base 1, pushing the upper fixed claw 9 to move. The three fixed claws 9 move to clamp the workpiece. During the clamping process, the fitting plate 14 fits against the outer wall of the workpiece. The fitting plate 14 rotates inside the extension claw 10 under the influence of the outer wall of the workpiece. The spring 13 contracts between the two rotating seats 11. When the fitting plate 14 rotates to a certain angle, its two ends closely adhere to the outer wall of the workpiece. The fitting plate 14 is tightly attached to the workpiece by the resilience of the spring 13. The alloy fitting blocks 23 on the outer walls of the fixed claw 9 and the extension claw 10 increase the friction force to ensure the stable fixation of the workpiece. In addition, drive the handle 22 to drive the bidirectional screw 19 to rotate inside the fixed block 17. The bearing 18 stabilizes the rotation of the bidirectional screw 19. The threaded relationship between the bidirectional screw 19 and the clamping block 20 makes the clamping block 20 slide inside the fixed block 17 and the limit groove 16. The limit plate 21 ensures the stable position. When the clamping block 20 completely moves into the fixed block 17, pull the extension claw 10 to make the extension plate 15 slide inside the fixed claw 9. After the extension claw 10 reaches the appropriate position, rotate the handle 22 in the reverse direction, and the clamping block 20 moves back into the limit groove 16 of the extension plate 15 to realize the height adjustment of the extension claw 10, ensuring the stability and accuracy of workpiece clamping.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chuck jaw of a machine tool, comprising a fixed base (1), characterized in that: A handle (2) is rotatably connected inside the fixed base (1). A worm (3) is fixedly connected to the outer wall of the handle (2). A worm gear (4) is rotatably connected inside the fixed base (1). The worm (3) meshes with the worm gear (4). An annular groove (5) is formed at the top of the worm gear (4). A limiting component is arranged inside the worm gear (4) and is used to stabilize the rotation of the worm gear (4). A sliding plate (8) is slidably connected to the top of the worm gear (4). A fixed claw (9) is fixedly connected to the upper surface of the sliding plate (8). The sliding plate (8) meshes with the annular groove (5). An extending claw (10) is arranged above the fixed claw (9). A rotating seat (11) is rotatably connected inside the extending claw (10). A telescopic rod (12) is fixedly connected to the outer wall of the rotating seat (11). A spring (13) is sleeved on the outer wall of the telescopic rod (12). The other ends of the springs (13) are fixedly connected to the outer wall of the rotating seat (11). A fitting plate (14) is rotatably connected to one side of the outer wall of the rotating seat (11). The outer wall of the fitting plate (14) is rotatably connected inside the extending claw (10). A chute (24) is formed inside the fixed base (1).

2. The chuck jaw of a machine tool according to claim 1, characterized in that: The limiting component includes a fixed ring (6). The outer wall of the fixed ring (6) is fixedly connected inside the worm gear (4). A limiting wheel (7) is slidably connected to the inner wall of the fixed ring (6). The outer wall of the limiting wheel (7) is rotatably connected inside the fixed base (1).

3. The chuck jaw of a machine tool according to claim 1, characterized in that: An extending plate (15) is slidably connected inside the fixed claw (9). The top of the extending plate (15) is fixedly connected to the lower surface of the extending claw (10).

4. The chuck jaw of a machine tool according to claim 3, characterized in that: A limiting groove (16) is formed inside the extending plate (15). A fixed block (17) is slidably connected inside the extending plate (15).

5. The chuck jaw of a machine tool according to claim 4, characterized in that: The outer wall of the fixed block (17) is fixedly connected to the outer wall of the fixed claw (9). Alloy fitting blocks (23) are fixedly connected to the outer walls of the fixed claw (9) and the extending claw (10).

6. The chuck jaw of a machine tool according to claim 5, characterized in that: A bearing (18) is fixedly connected inside the fixed block (17). A bidirectional screw (19) is fixedly connected to the inner wall of the bearing (18).

7. The chuck jaw of a machine tool according to claim 6, characterized in that: The outer wall of the bidirectional screw (19) is rotatably connected inside the fixed block (17). A clamping block (20) is threadedly connected to the outer wall of the bidirectional screw (19). The outer wall of the clamping block (20) is slidably connected inside the fixed block (17) and the fixed claw (9).

8. The chuck jaw of a machine tool according to claim 7, characterized in that: Handles (22) are fixedly connected to both ends of the bidirectional screw (19). A limiting plate (21) is fixedly connected to the outer wall of the clamping block (20). The outer wall of the limiting plate (21) is slidably connected inside the fixed block (17).

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