Multi-jaw chuck with self-centering structure

By designing self-centered protective components and clamping components in the multi-claw chuck, the problem of excessive clamping force when clamping thin-walled objects is solved, ensuring the stability and safety of objects.

CN222448319UActive Publication Date: 2025-02-11QINGDAO SHENGXIN HEAVY DUTY MACHINE TOOL
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Patent Information

Application Number
CN202420852800.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-23
Publication Date
2025-02-11
Estimated Expiration
2034-04-23

AI Technical Summary

Technical Problem

If the existing multi-claw chuck is not stopped in time when clamping thin-walled objects, it is easy to cause excessive clamping force, causing deformation or damage to the objects.

Method used

A multi-claw chuck with a self-centered structure is designed. By setting up a protective component and a clamping component, it ensures that the object will not deform due to excessive clamping force during clamping. The protective components include movable rods, sliders, limit blocks and clamping blocks. The clamping components include cavity, rotary plates, resistance rods, sliders, clamps, etc. The rotation of the threaded rod drives the movement of the movable rods and slide rods. , the coordination between the limit block and the clamp block ensures the synchronous movement of the slider and the clamp block to avoid excessive clamping force.

Benefits of technology

It effectively avoids deformation or damage of objects caused by failure to stop clamping in time, and ensures the stability and safety of objects during processing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of multi-jaw chucks, and discloses a multi-jaw chuck with a self-centering structure, which comprises a chuck, and a clamping component and a protective component are arranged inside and on the surface of the chuck. The clamping assembly comprises a cavity, a rotating plate, an abutting rod, a sliding block, a clamping block, a fixing plate, a first spring, a connecting plate, a first connecting column, a second connecting column, a through hole, a threaded rod, a sliding groove and a connecting hole, and the protection assembly comprises a movable rod. The angle of the movable rod is changed, the sliding rod moves downwards, the bottom of the sliding rod abuts against the inner wall of the abutting groove, the limiting block drives the clamping block to move close to the clamping groove, the clamping block enters the clamping groove, the clamping groove abuts against the side, away from the inclined face, of the clamping block, the clamping groove limits the clamping block, the sliding block cannot continue to move inwards in the radial direction, and the situation that an object is deformed due to the fact that stopping is not conducted in time can be avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of multi-jaw chucks, in particular to a multi-jaw chuck with a self-centering structure. Background Art

[0002] The multi-jaw chuck is a common mechanical clamping device, mainly used for clamping and fixing workpieces. It usually consists of a center shaft and multiple claws. Each claw is fixed to the center shaft and the workpiece is clamped or released by rotating the center shaft. The claws of the multi-jaw chuck can be adjusted and fixed as needed. This allows it to adapt to workpieces of different sizes and shapes. By rotating the center shaft, the claws can move inward or outward to clamp or release the workpiece. This clamping method can provide a firm clamping force to ensure the stability of the workpiece during processing.

[0003] When the existing multi-jaw chuck is clamping a thin-walled object, if the personnel do not stop the clamping work in time, the clamping force will be too large, causing the object to deform, seriously damaging the object, and affecting the subsequent normal use. Utility Model Content

[0004] The utility model aims to provide a multi-jaw chuck with a self-centering structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-claw chuck with a self-centering structure, comprising a chuck, wherein a clamping assembly and a protective assembly are arranged inside and on the surface of the chuck, wherein the clamping assembly comprises: a cavity, a rotating plate, a resisting rod, a sliding block, a clamping block, a fixing plate, a spring 1, a connecting plate, a connecting column 1, a connecting column 2, a through hole, a threaded rod, a sliding groove, and a connecting hole, and the protective assembly comprises:

[0006] The cam is provided with a plurality of springs, one end of which is hinged on the surface of the clamping block, and the other end of the movable rod is hinged with a sliding rod. The side of the sliding rod away from the movable rod is slidably connected to the surface of the fixed plate. A limiting groove is provided on the top of the sliding block, and the inner wall of the limiting groove is slidably connected to the limiting block. A spring second is fixed on the surface of the limiting block, and the end of the spring second away from the limiting block is fixed on the inner wall of the limiting groove. A stabilizing groove is provided on the end of the limiting block away from the spring second, and a clamping block is slidably connected to the inner wall of the stabilizing groove. A spring third is fixed on the surface of the clamping block. A resisting groove is provided on the top of the limiting block. The inner wall of the groove is provided with a slot, and the object fits with the surface of the clamping block. The threaded rod continues to be rotated, the angle of the movable rod changes, the sliding rod moves down, and the bottom of the sliding rod hits the inner wall of the interference groove. The limit block drives the blocking block to move close to the slot, and the blocking block enters the slot. The slot hits the side of the blocking block away from the inclined surface. The slot limits the blocking block, and the slider cannot continue to move radially inward. The threaded rod is reversed, and the connecting column one moves away from the connecting column two. The connecting plate drives the rotating plate to reverse, and the connecting hole enables the interference rod to drive the slider to move radially away from the center of the chuck, and the inclined surface of the blocking block hits the inner wall of the slot. The blocking block enters the stable slot and will not affect the normal return of the slider.

[0007] Preferably, the cavity is opened inside the chuck, the inner wall of the cavity is rotatably connected with a rotating plate, the surface of the rotating plate is opened with a connecting hole, the inner wall of the connecting hole is in contact with a resisting rod, a slider is fixed to the surface of the resisting rod, the top of the chuck is opened with a sliding groove, the top of the slider passes through the sliding groove, and the slider is slidably connected to the inner wall of the sliding groove, a clamping block is fixed to the top of the slider, a fixing plate is fixed to the top of the slider, a spring 1 is fixed to the surface of the fixing plate, the end of the spring 1 away from the fixing plate is fixed to the surface of the clamping block, A through hole is provided on the surface of the chuck, and a connecting plate is fixed on the surface of the rotating plate. The end of the connecting plate away from the rotating plate passes through the through hole. The top of the connecting plate is rotatably connected to a connecting column 1, and the surface of the chuck is rotatably connected to a connecting column 2. Threaded rods are provided on the surfaces of the connecting column 1 and the connecting column 2. By rotating the threaded rod, the connecting column 1 moves close to the connecting column 2, and the connecting column 1 drives the connecting plate to move. The rotating plate rotates so that the connecting hole contacts the contact rod, driving the slider to move synchronously. Reversing the threaded rod can make the clamp release the object.

[0008] Preferably, the connection hole is arranged to be arc-shaped, and when the rotating plate rotates, the connection hole contacts the contact rod to move.

[0009] Preferably, the abutment rods, sliders, clamping blocks and connecting holes are provided in three groups, and the three groups of abutment rods, sliders, clamping blocks and connecting holes are arranged in a circular array with the center of the chuck as the axis, so as to center the object.

[0010] Preferably, the end of the clamping block away from the spring three is arranged in the shape of an inclined surface, and when the inclined surface is abutted, the clamping block can enter the stable groove.

[0011] Preferably, the abutment groove is configured as an inclined surface, and when abutted, the limiting block drives the clamping block to move closer to the clamping groove.

[0012] Preferably, the threaded rod passes through connecting column two, and the threaded rod is rotatably connected to connecting column two. The end of the threaded rod away from connecting column two passes through connecting column one, and the threaded rod is threadably connected to connecting column one. When the threaded rod rotates, connecting column one moves closer to or away from connecting column two.

[0013] Compared with the prior art, the utility model provides a multi-jaw chuck with a self-centering structure, which has the following beneficial effects:

[0014] 1. The multi-claw chuck with a self-centering structure has a protective component. When the object fits the surface of the clamping block, when the threaded rod continues to be rotated, the angle of the movable rod changes, the slide rod moves downward, and the bottom of the slide rod contacts the inner wall of the contact groove. The limit block drives the clamping block to move close to the clamping groove. The clamping block enters the clamping groove, and the clamping groove contacts the side of the clamping block away from the inclined surface. The clamping groove limits the clamping block, and the slider cannot continue to move radially inward, which can avoid deformation of the object caused by not stopping in time.

[0015] 2. The multi-jaw chuck with a self-centering structure rotates the threaded rod through the clamping assembly, and the connecting column one moves close to the connecting column two. The connecting column one drives the connecting plate to move, and the rotating plate rotates, so that the connecting hole contacts the contact rod, driving the slider to move synchronously, and then driving the clamping block to move synchronously to clamp the object, so that the object can be clamped in a centering manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 4 It is a partial cross-sectional structural schematic diagram of the utility model;

[0020] Figure 5 This is a schematic diagram of the front view structure of the limit block and the interference groove of the utility model.

[0021] In the figure: 1. chuck; 2. clamping assembly; 20. cavity; 21. rotating plate; 22. interference rod; 23. slider; 24. clamping block; 25. fixing plate; 26. spring one; 27. connecting plate; 28. connecting column one; 29. ​​connecting column two; 200. through hole; 201. threaded rod; 202. slide groove; 203. connecting hole; 3. protection assembly; 30. movable rod; 31. slide rod; 32. limit groove; 33. limit block; 34. spring two; 35. stabilizing groove; 36. clamping block; 37. spring three; 38. interference groove; 39. clamping groove. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a multi-jaw chuck with a self-centering structure, including a chuck 1, the interior and surface of the chuck 1 are provided with a clamping component 2 and a protective component 3, the clamping component 2 includes: a cavity 20, a rotating plate 21, a resistance rod 22, a slider 23, a clamping block 24, a fixing plate 25, a spring 1 26, a connecting plate 27, a connecting column 1 28, a connecting column 29, a through hole 200, a threaded rod 201, a sliding groove 202, and a connecting hole 203, and the protective component 3 includes: a movable rod 30, a sliding rod 31, a limiting groove 32, a limiting block 33, a spring 2 34, a stabilizing groove 35, a clamping block 36, a spring 37, a resistance groove 38, and a clamping groove 39.

[0023] One end of the movable rod 30 is hinged on the surface of the clamping block 24, and the end of the movable rod 30 away from the clamping block 24 is hinged with a sliding rod 31, and the side of the sliding rod 31 away from the movable rod 30 is slidably connected to the surface of the fixed plate 25, and a limiting groove 32 is provided on the top of the slider 23, and the inner wall of the limiting groove 32 is slidably connected to the limiting block 33, and a spring 2 34 is fixed on the surface of the limiting block 33, and the end of the spring 2 34 away from the limiting block 33 is fixed on the inner wall of the limiting groove 32, and a stabilizing groove 35 is provided on the end of the limiting block 33 away from the spring 2 34, and the inner wall of the stabilizing groove 35 is slidably connected to the card block 3 6. A spring 37 is fixed on the surface of the block 36, a resistance groove 38 is provided on the top of the limit block 33, and a clamping groove 39 is provided on the inner wall of the slide groove 202. When the object fits the surface of the clamp block 24, when the threaded rod 201 is continuously rotated, the angle of the movable rod 30 changes, the slide rod 31 moves downward, and the bottom of the slide rod 31 is in contact with the inner wall of the resistance groove 38. The limit block 33 drives the block 36 to move close to the clamping groove 39, and the block 36 enters the clamping groove 39. The clamping groove 39 is in contact with the side of the block 36 away from the inclined surface. The clamping groove 39 limits the block 36, and the slider 23 cannot continue to move radially inward.

[0024] The cavity 20 is provided inside the chuck 1, and the inner wall of the cavity 20 is rotatably connected with a rotating plate 21, and a connecting hole 203 is provided on the surface of the rotating plate 21, and a resisting rod 22 is abutted against the inner wall of the connecting hole 203, and a slider 23 is fixed to the surface of the resisting rod 22, and a slide groove 202 is provided on the top of the chuck 1, and the top of the slider 23 passes through the slide groove 202, and the slider 23 is slidably connected with the inner wall of the slide groove 202, and a clamping block 24 is fixed on the top of the slider 23, and a fixing plate 25 is fixed on the top of the slider 23, and a spring 26 is fixed on the surface of the fixing plate 25, and one end of the spring 26 away from the fixing plate 25 is fixed to the surface of the clamping block 24, and the chuck 1 is provided with a plurality of springs 26. A through hole 200 is provided on the surface of the disk 1, and a connecting plate 27 is fixed on the surface of the rotating plate 21. The end of the connecting plate 27 away from the rotating plate 21 passes through the through hole 200. The top of the connecting plate 27 is rotatably connected to a connecting column 1 28, and the surface of the chuck 1 is rotatably connected to a connecting column 29. The surfaces of the connecting column 1 28 and the connecting column 29 are provided with a threaded rod 201. By rotating the threaded rod 201, the connecting column 1 28 moves close to the connecting column 29, and the connecting column 1 28 drives the connecting plate 27 to move. The rotating plate 21 rotates, so that the connecting hole 203 contacts the contact rod 22, driving the slider 23 and the clamping block 24 to move synchronously.

[0025] The connecting hole 203 is set to an arc shape, and when the rotating plate 21 rotates, the connecting hole 203 can contact the contact rod 22 to move. The contact rod 22, the slider 23, the clamping block 24, and the connecting hole 203 are all set in three groups, and the three groups of the contact rod 22, the slider 23, the clamping block 24, and the connecting hole 203 are all arranged in a circular array with the center of the chuck 1 as the axis center, which increases the stability of the clamping and can center the object. The end of the clamping block 36 away from the spring 37 is set to an inclined surface. When the inclined surface is contacted, the clamping block 36 enters the stable groove 35, and the interference groove 38 is set to be inclined. When it is interfered, the limit block 33 can drive the block 36 to move closer to the groove 39, the threaded rod 201 penetrates the connecting column 29, and the threaded rod 201 is rotatably connected to the connecting column 29. The end of the threaded rod 201 away from the connecting column 29 penetrates the connecting column 1 28, and the threaded rod 201 is threadedly connected to the connecting column 1 28, so that when the threaded rod 201 rotates, the connecting column 1 28 can be close to or away from the connecting column 29.

[0026] When it is necessary to clamp an object, the object is placed on the surface of the chuck 1. At this time, the person can rotate the threaded rod 201 to make the connecting column 1 28 move close to the connecting column 29, so that the connecting column 1 28 drives the connecting plate 27 to move, and drives the rotating plate 21 to rotate, so that the connecting hole 203 contacts the contact rod 22, drives the slider 23 to move synchronously, and then drives the clamping block 24 to move synchronously to clamp the object, and can clamp the object in a centering manner. When the person continues to rotate the threaded rod 201, the spring 1 26 is compressed, and the angle of the movable rod 30 changes, driving the sliding rod 31 to move downward. At this time, the bottom of the sliding rod 31 contacts the inner wall of the contact groove 38, and the limit block 33 drives the clamping block 36 to approach the clamping groove 3 9 moves, so that the block 36 enters the slot 39. At this time, when the slot 39 contacts the side of the block 36 away from the inclined surface, the slot 39 limits the block 36, so that the slider 23 cannot continue to move radially inward, which can avoid deformation of the object caused by not stopping in time. When it is necessary to loosen, the threaded rod 201 is reversed, the connecting column 1 28 moves away from the connecting column 29, and the rotating plate 21 is reversed through the connecting plate 27. The contact rod 22 drives the slider 23 to move radially away from the center of the chuck 1 through the connecting hole 203. At this time, the inclined surface of the block 36 contacts the inner wall of the slot 39, so that the block 36 enters the stable groove 35, which will not affect the normal return of the slider 23, so that the clamping block 24 releases the object, which can be taken out at this time.

[0027] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A multi-jaw chuck with a self-centering structure, comprising a chuck (1), characterized in that: The interior and surface of the chuck (1) are provided with a clamping assembly (2) and a protective assembly (3), wherein the clamping assembly (2) comprises: a cavity (20), a rotating plate (21), a resisting rod (22), a sliding block (23), a clamping block (24), a fixing plate (25), a spring 1 (26), a connecting plate (27), a connecting column 1 (28), a connecting column 2 (29), a through hole (200), a threaded rod (201), a sliding groove (202), and a connecting hole (203); and the protective assembly (3) comprises: A movable rod (30), one end of the movable rod (30) is hinged on the surface of the clamping block (24), one end of the movable rod (30) away from the clamping block (24) is hinged with a sliding rod (31), the side of the sliding rod (31) away from the movable rod (30) is slidably connected to the surface of the fixed plate (25), a limiting groove (32) is provided on the top of the slider (23), the inner wall of the limiting groove (32) is slidably connected to the limiting block (33), and a spring is fixed on the surface of the limiting block (33). (34), one end of the spring 2 (34) away from the limit block (33) is fixed on the inner wall of the limit groove (32), one end of the limit block (33) away from the spring 2 (34) is provided with a stabilizing groove (35), the inner wall of the stabilizing groove (35) is slidably connected with a clamping block (36), a spring 3 (37) is fixed on the surface of the clamping block (36), a resisting groove (38) is provided on the top of the limit block (33), and a clamping groove (39) is provided on the inner wall of the slide groove (202).

2. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: The cavity (20) is provided inside the chuck (1); the inner wall of the cavity (20) is rotatably connected to a rotating plate (21); a connecting hole (203) is provided on the surface of the rotating plate (21); the inner wall of the connecting hole (203) abuts against a resisting rod (22); a sliding block (23) is fixed to the surface of the resisting rod (22); a sliding groove (202) is provided on the top of the chuck (1); the top of the sliding block (23) passes through the sliding groove (202); the sliding block (23) is slidably connected to the inner wall of the sliding groove (202); a clamping block (24) is fixed to the top of the sliding block (23); a fixing plate (24) is fixed to the top of the sliding block (23); 5), a spring 1 (26) is fixed on the surface of the fixed plate (25), and one end of the spring 1 (26) away from the fixed plate (25) is fixed to the surface of the clamping block (24), a through hole (200) is opened on the surface of the chuck (1), a connecting plate (27) is fixed on the surface of the rotating plate (21), and one end of the connecting plate (27) away from the rotating plate (21) passes through the through hole (200), the top of the connecting plate (27) is rotatably connected to a connecting column 1 (28), and the surface of the chuck (1) is rotatably connected to a connecting column 2 (29), and the surfaces of the connecting column 1 (28) and the connecting column 2 (29) are provided with threaded rods (201).

3. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: The connection hole (203) is configured to be arc-shaped.

4. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: The abutment rod (22), the slider (23), the clamping block (24), and the connection hole (203) are all provided in three groups, and the three groups of abutment rod (22), the slider (23), the clamping block (24), and the connection hole (203) are all arranged in a circular array with the center of the chuck (1) as the axis.

5. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: One end of the clamping block (36) away from the spring three (37) is arranged in an inclined plane shape.

6. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: The abutment groove (38) is configured in a slope shape.

7. A multi-jaw chuck with a self-centering structure according to claim 1, characterized in that: The threaded rod (201) passes through the second connecting column (29), and the threaded rod (201) is rotatably connected to the second connecting column (29); one end of the threaded rod (201) away from the second connecting column (29) passes through the first connecting column (28), and the threaded rod (201) is threadedly connected to the first connecting column (28).