Front chuck

Abstract

The utility model discloses a front chuck, which relates to the field of chucks and comprises a fixed base, a rotating sleeve is rotatably mounted in the fixed base, a rotating disc is fixedly mounted on the side face of the rotating sleeve, an inner sleeve is fixedly mounted on the side face of the rotating disc, a large flange is fixedly mounted on the side face of the inner sleeve, and four movable grooves are formed in the large flange. And clamping jaw assemblies are slidably installed in the four movable grooves correspondingly, annular limiting rings are fixedly installed on the clamping jaw assemblies, a clamping driving structure is arranged on the side face of the rotating disc, and a direction adjusting structure is arranged on the side face of the rotating sleeve. The high-precision chuck meets the strict requirement of the high-end manufacturing field for the precision of parts, the clamping force of the high-precision chuck is uniform and stable, workpiece deformation caused by non-uniform clamping can be avoided, the high-precision chuck is particularly suitable for machining thin-wall parts and other parts prone to deformation, the structural design is compact, the rigidity is good, large cutting force can be borne, the stability of the machining process is guaranteed, and the machining efficiency is improved. The service life of the chuck is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of chuck technology, and in particular to a front chuck. Background Technology

[0002] A chuck is a mechanical device used on machine tools to clamp workpieces. It is a machine tool accessory that uses the radial movement of movable jaws evenly arranged on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: the chuck body, the movable jaws, and the jaw drive mechanism. It has a through hole in the center to allow the workpiece or bar stock to pass through, and a cylindrical or short conical structure on the back. It is directly or through a flange connected to the end of the machine tool spindle. Chucks are usually used on lathes, external cylindrical grinding machines, and internal cylindrical grinding machines. They can also be used with various indexing devices on milling machines and drilling machines.

[0003] In the existing technology, some rear chucks can meet the processing needs of a single type, but cannot meet the needs of high-precision production. Therefore, a precision front chuck is needed to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to provide a front chuck to solve the problem mentioned in the background art that some rear chucks can meet the processing needs of a single type but cannot meet the needs of high-precision production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a front chuck, including a fixed base, a rotating sleeve rotatably mounted inside the fixed base, a rotating disk fixedly mounted on the side of the rotating sleeve, an inner sleeve fixedly mounted on the side of the rotating disk, a large flange fixedly mounted on the side of the inner sleeve, four movable grooves opened on the large flange, a gripper assembly slidably mounted in each of the four movable grooves, an annular limiting ring fixedly mounted on the gripper assembly, a clamping drive structure arranged on the side of the rotating disk, and a direction adjustment structure arranged on the side of the rotating sleeve.

[0006] Preferably, the clamping drive structure includes a drive gear, which is rotatably mounted on the outer side of the inner sleeve. A fixed mounting bracket is fixedly mounted on the side of the large flange. A driven gear is rotatably mounted on the fixed mounting bracket. The driven gear meshes with the inner gear of the drive gear. A drive gear is fixedly mounted on the side of the driven gear. A rack is fixedly mounted on the gripper assembly. The drive gear meshes with the rack.

[0007] Preferably, a fixed mounting rod is fixedly installed on the side of the large flange, a rotating mounting bracket is rotatably mounted on the fixed mounting rod, and a cylinder is fixedly mounted on the rotating mounting bracket.

[0008] Preferably, a drive block is fixedly installed at the output end of the cylinder, and an L-shaped transmission rod is rotatably installed on the drive block. The L-shaped transmission rod is fixedly installed on the outer gear of the drive gear.

[0009] Preferably, the gripper assembly has a linear groove, and a linear slider is slidably installed in the linear groove. The linear slider is fixedly installed on the inner wall of the movable groove.

[0010] Preferably, the fixed base has an annular limiting groove on its side, and an annular limiting ring is rotatably installed in the annular limiting groove. The annular limiting ring is fixedly installed on the side of the rotating disk.

[0011] Preferably, the direction adjustment structure includes a motor mounting bracket, which is fixedly mounted on a fixed base. A steering motor is fixedly mounted on the motor mounting bracket, and a steering drive gear is fixedly mounted on the output end of the steering motor. A steering driven gear is fixedly mounted on the side of the rotating sleeve, and the steering driven gear meshes with the steering drive gear.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model utilizes the telescopic control of the cylinder output end to drive the rotation of the active gear, thereby driving the annular limiting ring to move on the large flange, achieving a multi-directional clamping effect. This device has high positioning accuracy, ensuring that the workpiece maintains a precise position throughout the processing, greatly improving processing accuracy and meeting the stringent requirements for component precision in high-end manufacturing. The high-precision chuck has uniform and stable clamping force, avoiding workpiece deformation caused by uneven clamping. It is especially suitable for processing easily deformable parts such as thin-walled parts. Its compact structure and high rigidity allow it to withstand large cutting forces, ensuring the stability of the processing and extending the chuck's service life.

[0014] 2. The cylinder-driven clamping method of this utility model also has unique advantages. The cylinder has a fast response speed and can quickly clamp and release the workpiece in a short time, effectively improving production efficiency and meeting the fast cycle requirements of automated production lines. The clamping force can be easily controlled by adjusting the air pressure, adapting to the clamping requirements of workpieces of different materials and shapes. It is highly flexible. The cylinder drive is clean and environmentally friendly. Compared with the hydraulic drive, there is no need to worry about oil pollution. It is simple to maintain and has low cost. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a front chuck according to the present invention;

[0016] Figure 2 This is a side view of the front chuck structure of the present invention;

[0017] Figure 3 This is a schematic diagram of a front chuck clamping drive structure according to the present invention;

[0018] Figure 4 This is a cross-sectional view of a front chuck according to the present invention.

[0019] Figure 5 This is a cross-sectional view of the front chuck of this utility model.

[0020] In the diagram: 100, fixed base; 101, rotating sleeve; 200, rotating disk; 201, inner sleeve; 202, large flange; 203, movable groove; 204, gripper assembly; 205, annular limiting ring; 206, linear slide groove; 207, linear slider; 208, annular limiting groove; 300, driving gear; 301, fixed mounting bracket; 302, driven gear; 303, drive gear; 304, rack; 305, fixed mounting rod; 306, rotating mounting bracket; 307, cylinder; 308, drive block; 309, L-shaped transmission rod; 400, motor mounting bracket; 401, steering motor; 402, steering drive gear; 403, steering driven gear. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-4 A front chuck includes a fixed base 100, a rotating sleeve 101 rotatably mounted within the fixed base 100, a rotating disk 200 fixedly mounted on the side of the rotating sleeve 101, an inner sleeve 201 fixedly mounted on the side of the rotating disk 200, and a large flange 202 fixedly mounted on the side of the inner sleeve 201. The large flange 202 has four movable slots 203, each containing a slidably mounted gripper assembly 204. An annular limiting ring is fixedly mounted on the gripper assembly 204. A clamping drive structure is arranged on the side of the rotating disk 200, and a direction adjustment structure is arranged on the side of the rotating sleeve 101. By utilizing the extension and retraction control of the cylinder output end to rotate the active gear, the annular limiting ring is driven to move on the large flange, thereby achieving a multi-directional clamping effect. This device has high positioning accuracy, ensuring that the workpiece maintains a precise position throughout the machining process, greatly improving machining accuracy and meeting the stringent precision requirements of high-end manufacturing fields for parts. The high-precision chuck has uniform and stable clamping force, which can avoid workpiece deformation caused by uneven clamping. It is especially suitable for machining easily deformable parts such as thin-walled parts. Its compact structural design and good rigidity can withstand large cutting forces, ensuring the stability of the machining process and extending the service life of the chuck.

[0023] The clamping drive structure includes a drive gear 300, which is rotatably mounted on the outside of the inner sleeve 201. A fixed mounting bracket 301 is fixedly mounted on the side of the large flange 202, and a driven gear 302 is rotatably mounted on the fixed mounting bracket 301. The driven gear 302 meshes with the inner gear of the drive gear 300. A drive gear 303 is fixedly mounted on the side of the driven gear 302. A rack 304 is fixedly mounted on the gripper assembly 204, and the drive gear 303 meshes with the rack 304. The inner side of the rotating drive gear 303 drives the driven gear 302 to rotate on the fixed mounting bracket 301. The rotating driven gear 302 drives the drive gear 303 to rotate, and the rotating drive gear 303 drives the rack 304 to move. The moving rack 304 causes the gripper assembly 204 to slide within the movable groove 203.

[0024] A fixed mounting rod 305 is fixedly installed on the side of the large flange 202. A rotating mounting bracket 306 is rotatably mounted on the fixed mounting rod 305. A cylinder 307 is fixedly mounted on the rotating mounting bracket 306. A drive block 308 is fixedly mounted on the output end of the cylinder 307. An L-shaped transmission rod 309 is rotatably mounted on the drive block 308. The L-shaped transmission rod 309 is fixedly mounted on the outer gear of the drive gear 300. When the device clamps, the cylinder 307 needs to be activated. The output end of the cylinder 307 drives the drive block 308 to rotate on the L-shaped transmission rod 309. The cylinder 307, in conjunction with the fixed mounting rods 305 and rotating mounting bracket 306, drive block 308 and L-shaped transmission rod 309 at both ends, extends and retracts, thereby driving the drive gear 300 to rotate on the large flange 202.

[0025] The gripper assembly 204 has a linear groove 206, and a linear slider 207 is slidably installed in the linear groove 206. The linear slider 207 is fixedly installed on the inner wall of the movable groove 203. The rotating disk 200 is restricted by the linear groove 206 and the linear slider 207, and can only rotate within a fixed range.

[0026] The fixed base 100 has an annular limiting groove 208 on its side, and an annular limiting ring 205 is rotatably installed in the annular limiting groove 208. The annular limiting ring 205 is fixedly installed on the side of the rotating disk 200. The rotating disk 200 is restricted by the annular limiting groove 208 and the annular limiting ring 205, and can only move within a fixed range.

[0027] The direction adjustment structure includes a motor mounting bracket 400, which is fixedly mounted on a fixed base 100. A steering motor 401 is fixedly mounted on the motor mounting bracket 400. A steering drive gear 402 is fixedly mounted on the output end of the steering motor 401. A steering driven gear 403 is fixedly mounted on the side of the rotating sleeve 101, and the steering driven gear 403 meshes with the steering drive gear 402. When the steering motor 401 is started, its output end drives the steering drive gear 402 to rotate. The rotating steering drive gear 402 drives the steering driven gear 403 to rotate, and the rotating steering driven gear 403 drives the rotating sleeve 101 to rotate within the fixed base 100.

[0028] Working principle:

[0029] When the device clamps, cylinder 307 needs to be activated. The output end of cylinder 307 drives drive block 308 to rotate on L-shaped transmission rod 309. Cylinder 307, in conjunction with fixed mounting rods 305 at both ends, rotating mounting bracket 306, drive block 308, and L-shaped transmission rod 309, extends and retracts, thereby driving drive gear 300 to rotate on large flange 202. The inner side of the rotating drive gear 303 drives driven gear 302 to rotate on fixed mounting bracket 301. The rotating driven gear 302 drives drive gear 303 to rotate. The rotating drive gear 303 drives rack 304 to move. The moving rack 304 drives gripper assembly 204 to slide in movable groove 203. The moving gripper assembly 204 drives ring... The limiting rings move, and the workpiece can be clamped when the four annular limiting rings come close to each other. The movement of the gripper assembly 204 is restricted by the annular limiting rings and the linear slide 206, and can only move within a fixed range. In order to ensure that the angle can be adjusted after the device clamps the workpiece, the steering motor 401 is started. The output end of the steering motor 401 drives the steering drive gear 402 to rotate. The rotating steering drive gear 402 drives the steering driven gear 403 to rotate. The rotating steering driven gear 403 drives the rotating sleeve 101 to rotate within the fixed base 100, so that the rotating sleeve 101 drives the rotating disk 200 to rotate. The rotating disk 200 is restricted by the linear slide 206 and the linear slider 207, and can only rotate within a fixed range.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A front chuck comprising a fixed base (100), characterized in that: The rotating sleeve (101) is rotatably installed in the fixed base (100), the side surface of the rotating sleeve (101) is fixedly installed with a rotating disc (200), the side surface of the rotating disc (200) is fixedly installed with an inner sleeve (201), the side surface of the inner sleeve (201) is fixedly installed with a large flange (202), four movable grooves (203) are formed in the large flange (202), four clamping jaw assemblies (204) are slidably installed in the four movable grooves (203), the clamping jaw assembly (204) is fixedly installed with an annular limiting ring (205), the side surface of the rotating disc (200) is provided with a clamping driving structure, and the side surface of the rotating sleeve (101) is provided with a direction adjusting structure.

2. A front chuck as claimed in claim 1, characterized in that: The clamping driving structure comprises a driving gear (300), the driving gear (300) is rotatably installed outside the inner sleeve (201), the side surface of the large flange (202) is fixedly installed with a fixed mounting frame (301), the fixed mounting frame (301) is rotatably installed with a driven gear (302), the driven gear (302) is meshed with the inner side gear of the driving gear (300), the side surface of the driven gear (302) is fixedly installed with a driving gear (303), the clamping jaw assembly (204) is fixedly installed with a rack (304), and the driving gear (303) is meshed with the rack (304).

3. A front chuck as claimed in claim 1, characterized in that: The side surface of the large flange (202) is fixedly installed with a fixed mounting rod (305), the fixed mounting rod (305) is rotatably installed with a rotating mounting frame (306), and the rotating mounting frame (306) is fixedly installed with an air cylinder (307).

4. A front chuck as claimed in claim 3, characterized in that: The output end of the air cylinder (307) is fixedly installed with a driving block (308), the driving block (308) is rotatably installed with an L-shaped transmission rod (309), and the L-shaped transmission rod (309) is fixedly installed on the outer side gear of the driving gear (300).

5. A front chuck as claimed in claim 1, characterized in that: The clamping jaw assembly (204) is provided with a straight sliding groove (206), a straight sliding block (207) is slidably installed in the straight sliding groove (206), and the straight sliding block (207) is fixedly installed on the inner wall of the movable groove (203).

6. A front chuck as claimed in claim 1, characterized in that: The side surface of the fixed base (100) is provided with an annular limiting groove (208), the annular limiting groove (208) is rotatably installed with an annular limiting ring (205), and the annular limiting ring (205) is fixedly installed on the side surface of the rotating disc (200).

7. A front chuck as claimed in claim 1, characterized in that: The direction adjusting structure comprises a motor mounting frame (400), the motor mounting frame (400) is fixedly installed on the fixed base (100), the motor mounting frame (400) is fixedly installed with a steering motor (401), the output end of the steering motor (401) is fixedly installed with a steering driving gear (402), the side surface of the rotating sleeve (101) is fixedly installed with a steering driven gear (403), and the steering driven gear (403) is meshed with the steering driving gear (402).

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