High-precision eccentric shaft clamp

Abstract

The utility model relates to a high-precision eccentric shaft clamp in the technical field of eccentric shaft clamps, a pressing device comprises a pressing assembly used for pressing and fixing an eccentric shaft workpiece, and a lifting device used for driving the pressing assembly to clamp the eccentric shaft workpiece is arranged at the top end of the pressing assembly. A round rod used for driving the lifting device to move up and down is arranged at the top end of the lifting device, and an operation assembly used for driving the round rod to move up and down is fixedly installed at the top end of the round rod. When an eccentric shaft workpiece in the clamp body needs to be clamped and fixed, a special workpiece is inserted into a flat head groove in the top end of a fixing block, a driving round rod moves downwards, meanwhile, a bolt can be driven to be in threaded connection with a threaded hole, and a rotating block can rotate around a sliding block in a groove of a pressing block; therefore, the eccentric shaft workpiece can be clamped and fixed through the pressing assembly, accurate angular positioning can be achieved, the eccentric shaft workpiece can be rapidly clamped and fixed, and universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of eccentric shaft clamps, in particular to a high-precision eccentric shaft clamp. Background Art

[0002] Eccentric shaft parts are widely used in the automotive field. The processing of eccentric shafts is carried out in large quantities by professional equipment. The eccentric shaft parts are manually eccentricized by clamping the parts with four jaws on a lathe or CNC lathe, or by using eccentric tooling. Therefore, a fixture is needed to clamp and fix the eccentric shaft parts.

[0003] For example, the Chinese patent application number CN201721600144.6 is a fixture for machining eccentric shafts, wherein the slider mechanism includes a slider base coaxially connected to the CNC spindle, a slider arranged on the outer end face of the slider base, the eccentric shaft to be machined is pressed on the slider by a pressure block, and after pressing, the axial direction of the eccentric shaft is parallel to the axial direction of the CNC spindle, and the slider base is provided with limit pins for limiting the sliding distance of the slider at both ends of the travel direction of the reciprocating sliding of the slider, and the displacement of the slider from the limit pin at one end to the limit pin at the other end is equal to the distance from the center of the outer diameter of the eccentric shaft to the center of the eccentric hole, and the sliding direction of the slider is perpendicular to the axial direction of the eccentric shaft; a tensioning mechanism, wherein the tensioning mechanism is sleeved in the axial hole of the CNC spindle, and one end of the tensioning mechanism extends through the slider base and is fixed to the slider, and the tensioning mechanism can reciprocate along the axial hole of the CNC spindle. It has the following technical defects:

[0004] When the clamp is used to clamp the eccentric shaft, the slider is locked and released by a CNC pull rod to move up and down on the slider base plane to clamp and fix the eccentric shaft, but accurate angular positioning cannot be achieved, the versatility is poor, and the eccentric shaft workpiece cannot be clamped and fixed quickly. Utility Model Content

[0005] In order to solve the problem raised in the above background technology that when the eccentric shaft is clamped by the clamp, the slider is moved up and down on the plane of the slider base by using a numerical control pull rod to clamp and fix the eccentric shaft, but accurate angular positioning cannot be achieved, the versatility is poor, and the eccentric shaft workpiece cannot be clamped and fixed quickly, the utility model provides the following technical solutions:

[0006] A high-precision eccentric shaft clamp comprises a clamp body fixedly connected to a CNC machine tool for clamping and fixing an eccentric shaft workpiece, a dense ball bearing is arranged in the clamp body for assisting the clamp body to rotate the eccentric shaft workpiece, a clamping nut is arranged on the left side of the clamp body for assisting the clamp body to clamp the eccentric shaft workpiece, and clamping devices are arranged on the upper and lower sides of the clamp body for clamping and fixing the eccentric shaft workpiece in the clamp body.

[0007] The clamping device includes a clamping assembly for clamping and fixing the eccentric shaft workpiece, a lifting device for driving the clamping assembly to clamp the eccentric shaft workpiece is arranged at the top end of the clamping assembly, a round rod for driving the lifting device to move up and down is arranged at the top end of the lifting device, and an operating assembly for driving the round rod to move up and down is fixedly installed at the top end of the round rod.

[0008] Furthermore, a positioning hole for positioning the eccentric shaft workpiece is provided inside the clamp body, threaded holes for threaded connection with the lifting device are provided on the upper and lower sides of the positioning hole, and a stepped groove for placing the operating component is provided at one end of the threaded hole away from the positioning hole.

[0009] Furthermore, the clamping assembly includes a clamping block for clamping the eccentric shaft workpiece, and a groove for rotating the lifting device is opened in the plate body of the clamping block, and sliders for assisting the rotation of the lifting device are fixedly installed on the left and right side walls of the groove of the clamping block.

[0010] Furthermore, the lifting device includes a bolt threadedly connected to the threaded hole, and the bottom end of the bolt is fixedly installed with a rotating block for rotating in the clamping block, and the rotating block is movably connected to the slider, so that when the eccentric shaft workpiece in the fixture body needs to be clamped and fixed, a special workpiece can be inserted into the flat head groove on the top of the fixed block to drive the round rod to move downward, and at the same time, the threaded connection between the bolt and the threaded hole can be driven, so that the clamping assembly can be driven to clamp and fix the eccentric shaft workpiece.

[0011] Furthermore, the operating assembly includes a fixed block fixedly mounted on the top end of the round rod, and a flat head groove is formed on the top end of the fixed block for driving the fixed block to rotate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By setting a clamping device, when the eccentric shaft workpiece in the clamp body needs to be clamped and fixed, the special workpiece can be inserted into the flat head groove on the top of the fixed block, so that the round rod can be driven to move downward, and at the same time, the threaded connection between the bolt and the threaded hole can be driven, so that the rotating block can be rotated around the slider in the groove of the clamping block, and the clamping assembly can clamp and fix the eccentric shaft workpiece, thereby achieving precise angular positioning and rapid clamping and fixing of the eccentric shaft workpiece, and has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the fixture body of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the clamping device of the utility model;

[0017] Figure 4 This is a cross-sectional view of the compression block of the utility model;

[0018] Figure 5 For this utility model Figure 4 Enlarged view of point A in the middle.

[0019] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0020] 100-eccentric shaft workpiece;

[0021] 200-clamp body, 201-positioning hole, 202-threaded hole, 203-step groove;

[0022] 300-Dense ball bearing;

[0023] 400-clamping device, 410-operating assembly, 411-fixed block, 412-flat head slot, 420-round rod, 430-lifting assembly, 431-bolt, 432-rotating block, 440-clamping assembly, 441-clamping block, 442-slider;

[0024] 500-Compression nut. DETAILED DESCRIPTION

[0025] The preferred specific implementation methods for implementing the present utility model are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

[0026] See also Figure 1-Figure 5 The utility model provides a high-precision eccentric shaft clamp.

[0027] The clamp body 200 includes a clamp body 200 fixedly connected to a CNC machine tool for clamping and fixing an eccentric shaft workpiece 100, a ball bearing 300 is arranged inside the clamp body 200 for assisting the clamp body 200 to rotate the eccentric shaft workpiece 100, a clamping nut 500 is arranged on the left side of the clamp body 200 for assisting the clamp body 200 to clamp the eccentric shaft workpiece 100, and clamping devices 400 are arranged on the upper and lower sides of the clamp body 200 for clamping and fixing the eccentric shaft workpiece 100 in the clamp body 200.

[0028] A positioning hole 201 for positioning the eccentric shaft workpiece 100 is provided inside the fixture body 200, and the positioning hole 201 is stepped to facilitate the insertion of the eccentric shaft workpiece 100 into the positioning hole 201; threaded holes 202 for threaded connection with the lifting device 430 are provided on the upper and lower sides of the positioning hole 201, and a stepped groove 203 for placing the operating component 410 is provided at one end of the threaded hole 202 away from the positioning hole 201, so that the clamping device 400 in the stepped groove 203 can be clamped and fixed to the eccentric shaft workpiece 100 in the positioning hole 201 through special tools.

[0029] The clamping device 400 includes a clamping assembly 440 for clamping and fixing the eccentric shaft workpiece 100. The top of the clamping assembly 440 is provided with a lifting device 430 for driving the clamping assembly 440 to clamp the workpiece 100. The top of the lifting device 430 is provided with a round rod 420 for driving the lifting device 430 to move up and down. The top of the round rod 420 is fixedly installed with an operating assembly 410 for driving the round rod 420 to move up and down.

[0030] The operating component 410 includes a fixed block 411 fixedly installed on the top of the round rod 420, and the fixed block 411 can move up and down in the stepped groove 203, so as to drive the round rod 420 to move up and down to drive the lifting device 430 to drive the clamping component 440 to clamp and fix the eccentric shaft workpiece 100 in the fixture body 200; a flat head groove 412 is provided at the top of the fixed block 411 for driving the fixed block 411 to rotate.

[0031] The lifting device 430 includes a bolt 431 threadedly connected to the threaded hole 202, and the top of the bolt 431 is connected to the bottom end of the round rod 420 by welding; the bottom end of the bolt 431 is fixedly installed with a rotating block 432 for rotating in the clamping block 441, and the rotating block 432 is movably connected to the slider 442; therefore, when it is necessary to clamp and fix the eccentric shaft workpiece 100 in the fixture body 200, a special workpiece can be inserted into the flat head groove 412 on the top of the fixing block 411, so as to drive the round rod 420 to move downward, and at the same time, the threaded connection between the bolt 431 and the threaded hole 202 can be driven, so as to drive the clamping assembly 440 to clamp and fix the eccentric shaft workpiece 100.

[0032] The clamping assembly 440 includes a clamping block 441 for clamping the eccentric shaft workpiece 100, and a groove for the lifting device 430 to rotate is opened in the plate body of the clamping block 441, and sliders 442 for assisting the lifting device 430 to rotate are fixedly installed on the left and right side walls of the groove of the clamping block 441; therefore, when it is necessary to clamp and fix the eccentric shaft workpiece 100 in the fixture body 200, a special workpiece can be inserted into the flat head groove 412 on the top of the fixing block 411, so that the round rod 420 can be driven to move downward, and at the same time, the threaded connection between the bolt 431 and the threaded hole 202 can be driven, so that the rotating block 432 can be rotated around the slider 442 in the groove of the clamping block 411, so that the clamping assembly 440 can clamp and fix the eccentric shaft workpiece 100, thereby achieving precise angular positioning and rapid clamping and fixing of the eccentric shaft workpiece 100, and has high versatility.

[0033] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. A high-precision eccentric shaft fixture, characterized in that: The invention comprises a fixture body (200) fixedly connected to a numerical control machine tool for clamping and fixing an eccentric shaft workpiece (100); a dense ball bearing (300) is arranged inside the fixture body (200) for assisting the fixture body (200) in rotating the eccentric shaft workpiece (100); a clamping nut (500) is arranged on the left side of the fixture body (200) for assisting the fixture body (200) in clamping the eccentric shaft workpiece (100); and clamping devices (400) are arranged on the upper and lower sides of the fixture body (200) for clamping and fixing the eccentric shaft workpiece (100) inside the fixture body (200); The clamping device (400) comprises a clamping assembly (440) for clamping and fixing an eccentric shaft workpiece (100); a lifting device (430) for driving the clamping assembly (440) to clamp the eccentric shaft workpiece (100) is arranged at the top end of the clamping assembly (440); a round rod (420) for driving the lifting device (430) to move up and down is arranged at the top end of the lifting device (430); and an operating assembly (410) for driving the round rod (420) to move up and down is fixedly installed at the top end of the round rod (420).

2. A high-precision eccentric shaft fixture according to claim 1, characterized in that: A positioning hole (201) for positioning the eccentric shaft workpiece (100) is provided in the clamp body (200), threaded holes (202) for threaded connection with the lifting device (430) are provided on the upper and lower sides of the positioning hole (201), and a stepped groove (203) for placing the operating component (410) is provided at one end of the threaded hole (202) away from the positioning hole (201).

3. A high-precision eccentric shaft fixture according to claim 2, characterized in that: The clamping assembly (440) comprises a clamping block (441) for clamping the eccentric shaft workpiece (100), and a groove for the lifting device (430) to rotate is provided in the plate body of the clamping block (441), and sliding blocks (442) for assisting the lifting device (430) to rotate are fixedly installed on the left and right side walls of the groove of the clamping block (441).

4. A high-precision eccentric shaft fixture according to claim 3, characterized in that: The lifting device (430) comprises a bolt (431) threadedly connected to the threaded hole (202), a rotating block (432) for rotating in the pressing block (441) being fixedly mounted at the bottom end of the bolt (431), and the rotating block (432) is movably connected to the sliding block (442).

5. The high-precision eccentric shaft fixture according to claim 1, characterized in that: The operating assembly (410) comprises a fixed block (411) fixedly mounted on the top of the round rod (420), and a flat head groove (412) for driving the fixed block (411) to rotate is provided at the top of the fixed block (411).

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