Fixed-length concentric clamp for processing drive axle

Abstract

The utility model relates to a fixed-length concentric clamp for processing a drive axle, which comprises a support, two ends of the support are respectively and rotatably connected with a three-jaw chuck and a driving piece, a positioning disc is clamped on the three-jaw chuck, telescopic pieces are arranged on the positioning disc and the driving piece, each telescopic piece is provided with a free end and a fixed end, and the free end and the fixed end are connected with the support. The two ends of the drive axle are inserted into the two sets of telescopic pieces respectively, then the multiple sets of adjusting pieces are driven by the pushing piece to move in the direction away from each other, the multiple sets of adjusting pieces are opened, on one hand, the multiple sets of adjusting pieces can limit the drive axles with round holes of different sizes, adaptability is improved, and on the other hand, the adjusting pieces are convenient to use. The multiple sets of adjusting pieces move at the same time, it can be guaranteed that the center axis of the drive axle is the same as the center axis of the telescopic piece, the drive axle is located in a concentric mode, in the rotating process, position deviation of the drive axle in the radial direction cannot be caused, and the machining precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drive axle processing, in particular to a fixed-length concentric clamp used for drive axle processing. Background Art

[0002] The drive axle is generally made by casting, and after casting, it needs to go through a series of rough machining and fine machining to obtain the finished product. Before the drive axle is finely machined, there are blank parts left over from casting at both ends. During the machining of the drive axle, since the inner hole clamping surface between the existing fixture and the end of the drive axle is small, it is easy to cause loose clamping, which can easily lead to the axis of the fixture and the drive axle being different during the machining of the drive axle, thereby affecting the machining accuracy of the drive axle. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a fixed-length concentric fixture for driving axle processing, and the specific technical solution is as follows:

[0004] A fixed-length concentric clamp for driving axle processing comprises a bracket, two ends of which are rotatably connected with a three-jaw chuck and a driving member, a positioning plate is clamped on the three-jaw chuck, and a telescopic member is provided on the positioning plate and the driving member, the telescopic member has a free end and a fixed end, and a plurality of groups of adjusting members are movably provided on the free end of the telescopic member, a pushing member is provided in the telescopic member, and the pushing member drives the plurality of groups of adjusting members to reciprocate along the radial direction of the telescopic member so that the plurality of groups of adjusting members can be retracted or opened, so as to control the periphery of the plurality of groups of adjusting members to enclose circular clamping areas of different diameters so as to insert the end of the driving axle, thereby realizing the concentric positioning of the driving axle, and a fixed-length rod is detachably provided on the three-jaw chuck, which is used to determine the spacing between the three-jaw chuck and the step portion on the driving axle.

[0005] As an improvement of the above technical solution, one end of the positioning plate away from the three-jaw chuck is movably connected to the fixed end of the telescopic part, and a positioning groove is provided on the surface of the telescopic part. The positioning groove is inclined, and a screw is rotatably inserted into the outer wall of the positioning plate, and one end of the screw interferes with the positioning groove to prevent the telescopic part from rotating or sliding along its axial direction.

[0006] As an improvement of the above technical solution, the driving member is fixedly connected to the fixed end of the telescopic member.

[0007] As an improvement of the above technical solution, the adjusting member includes a moving block which moves radially along the telescopic member, and a positioning block is integrally formed at one end of the moving block extending to the outside of the telescopic member. The peripheries of multiple groups of the positioning blocks are combined to form circular clamping areas of different diameters, and a spring is arranged between the moving block and the inner wall of the telescopic member.

[0008] As an improvement of the above technical solution, the pushing member includes a cylinder arranged in the telescopic member, and a conical head is fixedly connected to the output end of the cylinder. The cylinder drives the conical head to move the extrusion moving block along the axial direction in the telescopic member, so as to drive the moving block to drive the positioning block to move along the radial direction of the telescopic member.

[0009] As an improvement of the above technical solution, the moving block is provided with an arc-shaped portion adapted to the outer wall of the conical head.

[0010] Beneficial effects of the utility model:

[0011] By respectively plugging the two ends of the driving bridge into the two groups of telescopic parts, and then driving the multiple groups of adjusting parts to move away from each other through the pushing parts, the multiple groups of adjusting parts are opened. On the one hand, the multiple groups of adjusting parts can limit the driving bridges with circular holes of different sizes to improve adaptability. On the other hand, the simultaneous movement of the multiple groups of adjusting parts can ensure that the central axis of the driving bridge is the same as the central axis of the telescopic parts, so that the driving bridge is positioned in a concentric manner. During the rotation process, the driving bridge will not be shifted in the radial direction, thereby ensuring the processing accuracy. In addition, the fixed-length rod can be used to ensure that the distance between the step portion on the driving bridge and the three-jaw chuck is fixed, so that the processing equipment can accurately process each driving bridge according to the predetermined steps and positions, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main view of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the installation structure of the positioning plate and the telescopic member of the utility model;

[0014] Figure 3 This is a structural schematic diagram of the positioning block of the utility model;

[0015] Figure 4 It is a schematic diagram of the connection structure between the three-jaw chuck and the positioning plate of the utility model.

[0016] Figure numerals: 10, bracket; 20, three-jaw chuck; 21, positioning plate; 22, telescopic member; 221, moving block; 222, positioning block; 223, spring; 224, conical head; 225, cylinder; 226, positioning groove; 23, screw; 24, driving member; 30, fixed-length rod; 40, driving bridge; 41, step portion. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] The fixed-length concentric clamp for driving axle processing comprises a bracket 10, the two ends of which are rotatably connected with a three-jaw chuck 20 and a driving member 24, the three-jaw chuck 20 is provided with a positioning plate 21, the positioning plate 21 and the driving member 24 are provided with a telescopic member 22, the telescopic member 22 has a free end and a fixed end, the free end of the telescopic member 22 is movably provided with a plurality of groups of adjusting members, a pushing member is provided in the telescopic member, the pushing member drives the plurality of groups of adjusting members to reciprocate along the radial direction of the telescopic member 22 so that the plurality of groups of adjusting members can be retracted or opened, so as to control the periphery of the plurality of groups of adjusting members to enclose a circular clamping area of ​​different diameters so as to be inserted into the end of the driving axle, so as to realize the concentric positioning of the driving axle, the three-jaw chuck 20 is detachably provided with a fixed-length rod 30, which is used to determine the spacing between the three-jaw chuck and the step portion on the driving axle.

[0019] The positioning disk 21 is fixed at the center position by the three-jaw chuck 20. When the drive bridge 40 needs to be processed, the two ends of the drive bridge 40 are respectively inserted into the two groups of telescopic parts 22, and then the multiple groups of adjusting parts are driven by the pushing member to move in the direction away from each other, so that the multiple groups of adjusting parts are opened. On the one hand, the multiple groups of adjusting parts can limit the drive bridge 40 with circular holes of different sizes to improve adaptability. On the other hand, the simultaneous movement of the multiple groups of adjusting parts can ensure that the central axis of the drive bridge 40 is the same as the central axis of the telescopic part 22, so that the drive bridge 40 is positioned in a concentric manner. During the rotation process, the drive bridge 40 will not be shifted in the radial direction, thereby ensuring the processing accuracy. In addition, the fixed-length rod 30 can ensure that the distance between the step portion 41 on the drive bridge 40 and the three-jaw chuck 20 is fixed, so that the processing equipment can accurately process each drive bridge 40 according to the predetermined steps and positions, thereby improving the processing efficiency.

[0020] In one embodiment, one end of the positioning plate 21 away from the three-jaw chuck 20 is movably plugged with the fixed end of the telescopic member 22, and a positioning groove 226 is provided on the surface of the telescopic member 22, and the positioning groove 226 is inclined. A screw 23 is rotatably plugged into the outer wall of the positioning plate 21, and one end of the screw 23 conflicts with the positioning groove 226 to prevent the telescopic member 22 from rotating or sliding along its axial direction. Specifically, the telescopic member 22 can be adjusted to extend out of the positioning plate 21. Specifically, in order to adapt to the lengths of the two ends of the different drive bridges 40 to be processed, the screw 23 is loosened so that the screw 23 and the telescopic member 22 are aligned. The telescopic member 22 is disengaged, and then the length of the telescopic member 22 extending out of the positioning disk 21 is adjusted so that one end of the fixed-length rod 30 can be against the step portion 41 of the driving bridge 40, and then the screw 23 is tightened so that one end of the screw 23 conflicts with the positioning groove 226 on the telescopic member 22. The purpose of the inclined positioning groove 226 is, on the one hand, to prevent the telescopic member 22 from rotating in the positioning disk 21, and on the other hand, to effectively prevent the telescopic member 22 from moving along the length direction of the positioning disk 21, thereby increasing the stability of the installation of the telescopic member 22 and avoiding the problem of movement during processing.

[0021] In one embodiment, the driving member 24 is fixedly connected to the fixed end of the telescopic member 22. The driving member includes a rotating disk rotatably arranged on the bracket 10 and a motor fixedly arranged on the bracket 10. A transmission belt is arranged between the output shaft of the motor and the rotating disk. The motor drives the rotating disk to rotate through the transmission belt. The rotating disk drives the telescopic member 22 fixedly mounted thereon to rotate. The telescopic member 22 drives the drive bridge 40 to be processed to rotate.

[0022] In one embodiment, the adjusting member includes multiple groups of moving blocks 221 that move radially along the telescopic member 22, and the moving blocks 221 extend to one end of the outside of the telescopic member 22 and are integrally provided with positioning blocks 222. The peripheries of the multiple groups of positioning blocks 222 are combined to form a circular clamping area with different diameters, and a spring 223 is provided between the moving blocks 221 and the inner wall of the telescopic member 22. Specifically, the pushing member extends to drive the multiple groups of moving blocks 221 to move in a direction away from each other to squeeze the spring 223, and the moving blocks 221 drive the positioning blocks 222 to move, so that the peripheries of the multiple groups of positioning blocks 222 are combined to form circles with different diameters, and the driving bridge 40 with circular holes of different sizes can be quickly limited. When it is necessary to disengage from the driving bridge 40, the pushing member is retracted, and under the action of the restorative elastic force of the spring 223, the multiple groups of moving blocks 221 move in a direction close to each other, so that the moving blocks 221 drive the positioning blocks 222 to return to their initial positions, which is convenient for disassembly or reinstallation.

[0023] In one embodiment, the pushing member includes a cylinder 225 arranged in the telescopic member 22, and the output end of the cylinder 225 is fixedly connected to a conical head 224. The cylinder 225 drives the conical head 224 to move in the axial direction in the telescopic member 22 to squeeze the moving block 221, so as to drive the moving block 221 to drive the positioning block 222 to move in the radial direction of the telescopic member 22. The moving block 221 is provided with an arc portion that is adapted to the outer wall of the conical head 224. Specifically, the cylinder 225 drives the conical head 224 to move, so that the conical head 224 pushes the arc portions of multiple groups of moving blocks 221, so that the moving blocks 221 move in a direction away from each other under the action of the arc portions. When the cylinder 225 drives the conical head 224 to retract, the spring 223 pushes the moving block 221 to return to its initial position.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixed-length concentric fixture for driving axle processing, characterized by: The invention comprises a bracket (10), the two ends of which are rotatably connected with a three-jaw chuck (20) and a driving member (24), the three-jaw chuck (20) being provided with a positioning plate (21) in engagement, the positioning plate (21) and the driving member (24) being provided with a telescopic member (22), the telescopic member (22) having a free end and a fixed end, the free end of the telescopic member (22) being provided with a plurality of groups of adjusting members, a pushing member being provided inside the telescopic member, the pushing member driving the plurality of groups of adjusting members to reciprocate along the radial direction of the telescopic member (22) so that the plurality of groups of adjusting members are folded or opened, so as to control the peripheries of the plurality of groups of adjusting members to enclose circular clamping areas of different diameters so as to be inserted into the end of the driving bridge, thereby realizing the concentric positioning of the driving bridge, the three-jaw chuck (20) being provided with a detachable fixed-length rod (30) for determining the spacing between the three-jaw chuck (20) and the step portion on the driving bridge.

2. The fixed-length concentric fixture for driving axle processing according to claim 1 is characterized in that: One end of the positioning plate (21) away from the three-jaw chuck (20) is movably plugged into the fixed end of the telescopic member (22); a positioning groove (226) is provided on the surface of the telescopic member (22); the positioning groove (226) is inclined; a screw rod (23) is rotatably plugged into the outer wall of the positioning plate (21); one end of the screw rod (23) contacts the positioning groove (226) to prevent the telescopic member (22) from rotating or sliding along its axial direction.

3. The fixed-length concentric fixture for driving axle processing according to claim 1 is characterized in that: The driving member (24) is fixedly connected to the fixed end of the telescopic member (22).

4. The fixed-length concentric fixture for driving axle processing according to claim 1, characterized in that: The adjusting member comprises a moving block (221) which moves radially along the telescopic member (22); one end of the moving block (221) extending to the outside of the telescopic member (22) is provided with an integral positioning block (222); the peripheries of a plurality of groups of the positioning blocks (222) are combined to form circular clamping areas of different diameters; and a spring (223) is provided between the moving block (221) and the inner wall of the telescopic member (22).

5. The fixed-length concentric fixture for driving axle processing according to claim 4, characterized in that: The pushing member comprises a cylinder (225) arranged in the telescopic member (22); the output end of the cylinder (225) is fixedly connected to a conical head (224); the cylinder (225) drives the conical head (224) to move along the axial direction in the telescopic member (22) to squeeze the moving block (221), so as to drive the moving block (221) to drive the positioning block (222) to move along the radial direction of the telescopic member (22).

6. The fixed-length concentric fixture for driving axle processing according to claim 5, characterized in that: The movable block (221) is provided with an arc-shaped portion adapted to the outer wall of the conical head (224).

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