A machine tool shaft machining fixture of self-centering rotary change end

Abstract

The utility model discloses a machine tool shaft machining clamp of self centering rotation change end relates to machine tool processing technical field. The utility model discloses an installation seat, the top limiting rotation of installation seat is connected with the rotary table, the central place fixed mounting of rotary table bottom is limited to the disc, the rotary table is limited to the rotary table limiting rotation through the disc, the central place of rotary table top is equipped with the installation slot, be provided with clamping subassembly between rotary table top installation slot, clamping subassembly is used for clamping and fixing to the workpiece of different diameter, the bevel gear of clamping subassembly's right side fixed mounting has the tooth ring strip. The utility model discloses when carrying out the machining to the end face of shaft workpiece, can more conveniently rotate the workpiece of clamping fixed and change the end, has improved the processing efficiency of workpiece, can support the workpiece of rotation change end before and after simultaneously with the thimble, has improved the stability of workpiece processing.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, specifically to a self-centering rotary end-changing machine tool shaft processing fixture. Background Technology

[0002] In the manufacturing process of metal workpieces, machine tools are mostly used for processing. However, for some shaft-type workpieces, after the outer circumference of the workpiece is processed and polished, it is necessary to drill holes or chamfer the two ends of the workpiece. Therefore, it is necessary to further process the workpiece by milling or turning machine.

[0003] When machining the end face of a workpiece using a milling machine or rotary machine, the workpiece needs to be vertically clamped and fixed using a fixture. However, existing machine tool shaft machining fixtures cannot rotate the workpiece after clamping and fixing it, requiring disassembly and re-fixing, which reduces the efficiency of workpiece machining. Furthermore, after clamping and fixing, they cannot provide stable support for the bottom end of the workpiece, reducing the stability of workpiece machining. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of existing machine tool shaft machining fixtures, which cannot rotate the workpiece after clamping and fixing, requiring disassembly and fixing again, thus reducing the efficiency of workpiece machining, and cannot provide stable support for the bottom end of the workpiece after clamping and fixing, thus reducing the stability of workpiece machining. This utility model provides a self-centering rotary end-changing machine tool shaft machining fixture.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A self-centering rotary end-changing machine tool shaft machining fixture includes a mounting base, a turntable rotatably connected to the top of the mounting base, a limiting plate fixedly mounted at the center of the bottom end of the turntable, the turntable being rotatably connected to the limiting plate, a mounting groove formed at the center of the top of the turntable, a clamping assembly disposed between the mounting grooves on the top of the turntable, the clamping assembly being used to clamp and fix workpieces of different diameters, a bevel gear fixedly mounted on the right side of the clamping assembly, and a toothed ring rack fixedly mounted on the right side of the top end of the mounting base.

[0006] Furthermore, the limiting disk is rotatably connected to the center of the top of the mounting base, and the outer periphery of the limiting disk is uniformly connected with rolling balls, thereby realizing the limiting rotation connection of the turntable on the top of the mounting base.

[0007] Furthermore, the toothed ring extends upward into the interior of the turntable, and the top of the toothed ring meshes with the bevel gear. The number of teeth on the toothed ring is half the number of teeth on the bevel gear. Therefore, when the bevel gear rotates relative to the toothed ring, the meshing between the toothed ring and the bevel gear enables the bevel gear to rotate 180°.

[0008] Furthermore, the clamping assembly includes a cylindrical tube, which is rotatably connected between the mounting slots on the top of the turntable. A rotating ring is rotatably connected to the outer periphery of the top of the cylindrical tube, and a spiral disk is fixedly connected to the bottom end of the rotating ring. A spiral groove is formed at the bottom of the spiral disk. Three claws are slidably connected to the lower part of the spiral disk inside the cylindrical tube, and toothed blocks are fixedly connected to the top of the outer side of each claw.

[0009] Furthermore, the inner sides of the claws extend inward to the hollow part inside the cylindrical tube, and the teeth at the top of the claws mesh with the spiral grooves at the bottom of the spiral disk. Therefore, when the spiral disk rotates, it can drive the claws to retract inward or expand outward synchronously.

[0010] Furthermore, a limiting post is fixedly installed on the left side of the top of the mounting base. A protruding post is slidably connected inside the top of the limiting post. A spring is fixedly connected between the bottom end of the protruding post and the inner wall of the limiting post. Two grooves are opened above the protruding post inside the turntable. The rotation of the turntable is limited by the cooperation between the protruding post and the grooves.

[0011] Furthermore, the turntable has annular grooves on its left and right sides to allow it to rotate relative to the toothed ring and the limiting post, thus enabling the turntable to rotate in a limited manner.

[0012] Furthermore, a pin is installed at the center of the bottom of the mounting groove on the top of the turntable. The pin can move up and down by hydraulic control, so that after the workpiece is clamped and fixed by the clamping assembly, the pin can support the bottom end of the workpiece.

[0013] The beneficial effects of this utility model are as follows: This invention, through the design of the clamping assembly between the top of the turntable, allows for the rotation and end-to-end changes of the workpiece after it is clamped and fixed. This is achieved by utilizing the gear ring rack and the bevel gear on the right side of the clamping assembly, and by rotating the turntable. This enables more convenient processing of both ends of the workpiece, improving the processing efficiency. At the same time, the ejector pins provide support for the workpiece before and after the rotation and end-to-end changes, enhancing the stability of the workpiece processing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the three-dimensional structure of this utility model; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the mounting platform of this utility model. Figure 1 ; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the mounting platform of this utility model. Figure 2 ; Figure 5 This is a partial cross-sectional three-dimensional structural schematic diagram of the turntable of this utility model; Figure 6 This is a three-dimensional structural diagram of the mounting platform and clamping assembly of this utility model; Figure 7 This is a cross-sectional perspective view of the clamping component of this utility model. Figure 1 ; Figure 8 This is a cross-sectional perspective view of the clamping component of this utility model. Figure 2 ; Figure 9 This is an exploded cross-sectional view of the clamping component of this utility model.

[0015] Reference numerals in the attached drawings: 1. Mounting base; 2. Turntable; 3. Limiting plate; 4. Mounting groove; 5. Clamping assembly; 51. Cylindrical tube; 52. Rotary ring; 53. Spiral disc; 54. Claw; 55. Tooth block; 6. Bevel gear; 7. Toothed ring strip; 8. Limiting post; 9. Protruding post; 10. Spring; 11. Groove; 12. Ejector pin. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0017] A preferred embodiment of the present invention, a self-centering rotary end-changing machine tool shaft machining fixture, will be described in detail below, such as... Figures 1-6 As shown, a self-centering rotary end-changing machine tool shaft machining fixture includes a mounting base 1. A turntable 2 is rotatably connected to the top of the mounting base 1. A limiting disk 3 is fixedly installed at the center of the bottom end of the turntable 2. The turntable 2 is rotatably connected to the limiting disk 3. The limiting disk 3 is rotatably connected to the center of the top of the mounting base 1, and ball bearings are evenly connected to the periphery of the limiting disk 3 to limit the rotation of the turntable 2 at the top of the mounting base 1.

[0018] A mounting slot 4 is provided at the center of the top of the turntable 2. A clamping assembly 5 is provided between the mounting slots 4 on the top of the turntable 2. The clamping assembly 5 is used to clamp and fix workpieces of different diameters. A bevel gear 6 is fixedly installed on the right side of the clamping assembly 5. A toothed ring bar 7 is fixedly installed on the right side of the top of the mounting base 1.

[0019] The toothed ring 7 extends upward into the interior of the turntable 2. The top of the toothed ring 7 meshes with the bevel gear 6. The number of teeth on the toothed ring 7 is half the number of teeth on the bevel gear 6. Therefore, when the bevel gear 6 rotates relative to the toothed ring 7, the meshing between the toothed ring 7 and the bevel gear 6 enables the bevel gear 6 to rotate 180°.

[0020] A limiting post 8 is fixedly installed on the left side of the top of the mounting base 1. A protruding post 9 is slidably connected inside the top of the limiting post 8. A spring 10 is fixedly connected between the bottom end of the protruding post 9 and the inner wall of the limiting post 8. Two grooves 11 are opened above the protruding post 9 inside the turntable 2. The rotation of the turntable 2 is limited by the cooperation between the protruding post 9 and the grooves 11. Annular grooves are opened on the left and right sides inside the turntable 2 so that the turntable 2 can rotate relative to the toothed ring 7 and the limiting post 8, so that the turntable 2 can perform limited rotation.

[0021] A ejector pin 12 is installed at the center of the bottom of the mounting groove 4 at the top of the turntable 2. The ejector pin 12 can move up and down by hydraulic control. After the workpiece is clamped and fixed by the clamping assembly 5, the ejector pin 12 can support the bottom of the workpiece.

[0022] Furthermore, such as Figures 6-9 As shown, the clamping assembly 5 includes a cylindrical tube 51. The cylindrical tube 51 is rotatably connected between the mounting groove 4 on the top of the turntable 2. A rotating ring 52 is rotatably connected to the outer periphery of the top of the cylindrical tube 51. A spiral disk 53 is fixedly connected to the bottom end of the rotating ring 52. A spiral groove is opened at the bottom of the spiral disk 53. Three claws 54 are evenly slidably connected below the spiral disk 53 inside the cylindrical tube 51. A toothed block 55 is fixedly connected to the top of the outer side of the claw 54.

[0023] The inner sides of the claws 54 extend inward to the hollow part inside the cylindrical tube 51, and the toothed blocks 55 at the top of the claws 54 mesh with the spiral grooves at the bottom of the spiral disk 53. Therefore, when the spiral disk 53 rotates, it can drive the claws 54 to retract inward or expand outward in sync.

[0024] The working principle of this utility model is as follows: First, the machine tool shaft machining fixture is fixedly installed to the machine tool using mounting base 1.

[0025] When it is necessary to process the end face of a shaft-type workpiece, the workpiece is inserted into the interior of the cylindrical tube 51. Then, the rotating ring 52 drives the spiral disk 53 to rotate. During the rotation of the spiral disk 53, the spiral groove at the bottom of the spiral disk 53 and the toothed block 55 at the top of the chuck 54 are designed to mesh with each other, which can drive the chuck 54 to retract inward synchronously, thereby clamping and fixing the workpiece inserted into the cylindrical tube 51. After the workpiece is fixed, the bottom end of the workpiece is supported by the ejector pin 12, which facilitates stable processing of the workpiece.

[0026] After the machining of one end face of the workpiece is completed, the ejector pin 12 can be moved down first, and then the turntable 2 can be rotated so that the turntable 2 rotates relative to the toothed ring 7 and the limiting post 8. During the rotation of the turntable 2 relative to the toothed ring 7, the meshing between the toothed ring 7 and the bevel gear 6, and the design that the number of teeth of the toothed ring 7 is half the number of teeth of the bevel gear 6, can enable the bevel gear 6 to drive the clamping assembly 5 to rotate 180°, thereby realizing the rotation and end change of the workpiece clamped and fixed by the clamping assembly 5.

[0027] After the end change is completed, the rotation of the turntable 2 is limited by the cooperation between the top protrusion 9 of the limiting post 8 and the groove 11. At the same time, the bottom end of the workpiece after the end change is supported by the ejector pin 12 to facilitate the processing of the other end of the workpiece.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-centering rotary end-changing machine tool shaft machining fixture, comprising a mounting base (1), characterized in that, The top of the mounting base (1) is rotatably connected to a turntable (2). A limiting plate (3) is fixedly installed at the center of the bottom of the turntable (2). The turntable (2) is rotatably connected to the turntable (2) through the limiting plate (3). An installation groove (4) is provided at the center of the top of the turntable (2). A clamping assembly (5) is provided between the installation grooves (4) on the top of the turntable (2). The clamping assembly (5) is used to clamp and fix workpieces of different diameters. A bevel gear (6) is fixedly installed on the right side of the clamping assembly (5). A toothed ring bar (7) is fixedly installed on the right side of the top of the mounting base (1).

2. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 1, characterized in that, The limiting disk (3) is rotatably connected to the center of the top of the mounting base (1), and the outer periphery of the limiting disk (3) is uniformly connected with rolling balls.

3. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 1, characterized in that, The toothed ring (7) extends upward into the interior of the turntable (2), and the top of the toothed ring (7) meshes with the bevel gear (6), and the number of teeth of the toothed ring (7) is half the number of teeth of the bevel gear (6).

4. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 1, characterized in that, The clamping assembly (5) includes: A cylindrical tube (51) is rotatably connected between the top mounting groove (4) of the turntable (2); Rotary ring (52), the outer periphery of the top of the cylindrical tube (51) is rotatably connected to the rotating ring (52); Spiral disk (53), the bottom end of the rotating ring (52) is fixedly connected to the spiral disk (53), and the bottom of the spiral disk (53) is provided with a spiral groove; The cylindrical tube (51) has three claws (54) that are evenly and slidably connected to the spiral disk (53) below it. Tooth block (55), the top of the outer side of the claw (54) is fixedly connected to the tooth block (55).

5. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 4, characterized in that, The inner sides of the claws (54) extend inward to the hollow part inside the cylindrical tube (51), and the toothed block (55) at the top of the claws (54) and the spiral groove at the bottom of the spiral disk (53) mesh with each other.

6. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 1, characterized in that, A limiting post (8) is fixedly installed on the left side of the top of the mounting base (1). A protruding post (9) is slidably connected inside the top of the limiting post (8). A spring (10) is fixedly connected between the bottom end of the protruding post (9) and the inner wall of the limiting post (8). Two grooves (11) are opened above the protruding post (9) inside the turntable (2).

7. The self-centering rotary end-changing machine tool shaft machining fixture according to claim 6, characterized in that, The turntable (2) has ring grooves on its left and right sides inside, which allow the turntable (2) to rotate relative to the toothed ring (7) and the limiting post (8).

8. The self-centering rotary end-changing machine tool shaft machining fixture according to any one of claims 1-7, characterized in that, A pin (12) is installed at the center of the bottom of the mounting groove (4) on the top of the turntable (2). The pin (12) can move up and down by hydraulic control.

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