Cam grinding fixture for camshaft with eccentric groove structure

Abstract

The present invention discloses a cam grinding fixture for a camshaft with an eccentric groove structure, comprising a fixture body (9), a positioning plate (12), a pressing plate (11) and a lever device, wherein a circular hole is arranged in the middle of the fixture body (9), a groove is arranged in the middle of one end of the fixture body (9), a connecting mechanism is arranged at the other end of the fixture body (9), a screw hole is arranged on the side of the fixture body (9) at the groove end, the positioning plate (12) is arranged on the circular hole in the middle of the fixture body (9), a circular hole is arranged in the middle of the positioning plate (12), and the positioning plate (12) is arranged on the circular hole in the middle of the fixture body (9). ) is provided with a positioning pin, which is placed in a circular hole in the middle of the clamp body (9), a pressure plate (11) is provided on the positioning plate, the positioning plate (12) can move parallel to the pressure plate (11) and the clamp body (9), a spring (2) is provided between the positioning plate (12) and the clamp body (9) at the groove end, and the lever device is fixedly connected to the side of the clamp body (9) through a connecting plate (5), which effectively solves the positioning problem of machining a camshaft with an eccentric groove structure on an existing cam grinder.

Description

Technical Field

[0001] The invention relates to a cam grinding fixture of a camshaft with an eccentric groove structure. Background Art

[0002] At present, there are two ways to clamp the camshaft when grinding the cam: automatic clamping and manual clamping. Since this type of camshaft has an eccentric groove structure, the clamping and positioning method becomes more important. Automatic clamping can meet the needs of cam grinding clamping and positioning of camshafts with eccentric groove structures, but it requires specially customized spring chucks and positioning mechanisms, can only be used for single product processing, and has high procurement costs and long cycles. The manual clamping method uses a manual method to install the cam grinding fixture on the camshaft. This method fixes the camshaft by corresponding the locating pin on the locating block with the eccentric groove on the camshaft end face. Although the locating pin and the eccentric groove on the camshaft end face are set correspondingly, the eccentric groove on the camshaft end face will not deviate to one side of the locating pin. During the processing process, the operator needs to control the positioning on both sides. Due to human factors such as the operator's experience and proficiency, and the camshaft with an eccentric groove structure, angular positioning is difficult, and the phase angle error is large after the cam is processed. Summary of the invention

[0003] The purpose of the present invention is to provide a cam grinding fixture for a camshaft with an eccentric groove structure, overcome the shortcomings of the prior art, achieve accurate positioning of the camshaft by manual clamping, complete the processing of the cam by a grinder, and the phase angle of the cam after processing meets the standard requirements.

[0004] To achieve the above-mentioned purpose, the cam grinding fixture of the camshaft with an eccentric groove structure of the present invention includes a fixture body, a positioning plate, a pressure plate and a lever device. A circular hole is set in the middle of the fixture body, a groove is set in the middle of one end of the fixture body, a connecting mechanism is set at the other end of the fixture body, a screw hole is set on the side of the fixture body at the groove end, the positioning plate is set on the circular hole in the middle of the fixture body, a circular hole is set in the middle of the positioning plate, a positioning pin is set on the positioning plate, and the positioning pin is placed in the circular hole in the middle of the fixture body, the pressure plate is set on the positioning plate, the positioning plate can move parallel to the pressure plate and the fixture body, a spring is set between the positioning plate and the fixture body at the groove end, and the lever device is fixedly connected to the side of the fixture body through a connecting block.

[0005] The lever device is that one end of the connecting block is fixedly connected to the side of the clamp body, and a groove is set at the other end of the connecting block. One end of the lever is fitted with the positioning block, and one end of the other end of the lever is set with a through hole corresponding to the through hole of the connecting block. The cylindrical pin is inserted into the through holes of the connecting block and the lever in sequence, and the other end of the lever is folded down at 90°, and a screw hole is set at the vertical folded position. A screw hole is set at one end of the lever corresponding to the screw hole at the vertical folded position, and the lever is fixedly connected to the lever with a hexagon socket head screw.

[0006] The lever device is that one end of the connecting block is fixedly connected to the clamp body, and the other end of the connecting block is provided with a groove, one end of the lever is fitted with the positioning block, and one end of the other end of the lever is provided with a through hole corresponding to the through hole of the connecting block, and the cylindrical pin is inserted into the through holes of the connecting block and the lever in sequence, and another end of the other end of the lever is folded down 90°, a screw hole is provided at the vertical folded position, and then it is folded flat 90° to be parallel to the clamp body, a groove is provided at the 90° folded end, a screw hole is provided on the 90° folded end, and a screw hole is provided on the clamp body corresponding to the end groove of the 90° folded end, one end of the screw rod is placed in the screw hole on the side of the clamp body, and the other end of the screw is connected to the nut so that the screw is placed in the end groove of the 90° folded flat, the end of the lever is set to an "L" shape, the bottom end of the "L" shape is connected to the handle, the upper part of the "L" shape is provided with a screw hole and corresponds to the screw hole at the vertical folded position, and the lever is fixedly connected to the lever by a hexagon socket cylindrical head screw.

[0007] The pressing plate is set to be "U"-shaped, and a mortise and tenon groove is set at one end of the corresponding positioning plate, and the pressing plate is fixed to the clamp body with a hexagon socket head screw.

[0008] The connecting block is in the shape of a flat plate, is placed on or below the lever, and is fixedly connected to the lever via a cylindrical pin.

[0009] Compared with the prior art, the cam grinding fixture for the camshaft with an eccentric groove structure of the present invention has the following excellent effects.

[0010] The cam grinding fixture of the camshaft with an eccentric groove structure of the present invention adopts the lever principle. The positioning plate can be moved up and down by the action of the lever and the spring. The positioning pins on the positioning plate are arranged corresponding to the eccentric grooves on the end face of the camshaft. The positioning pins on the moving positioning plate are in close contact with the positioning surface of the eccentric grooves, which effectively solves the positioning problem of machining the camshaft with an eccentric groove structure on the existing cam grinder. The existing cam grinder can also be used to produce products that meet customer requirements, thereby improving equipment utilization and avoiding the high cost investment problem caused by purchasing a special clamping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG. 1 is a schematic diagram of a cam grinding fixture for a camshaft with an eccentric groove structure according to the present invention.

[0012] Among them: 1 is a bolt, 2 is a spring, 3 is a lever, 4 is a cylindrical pin, 5 is a connecting plate, 6 is a lever, 7 is a hexagon socket cylindrical end set screw, 8 is a hexagonal nut, 9 is a fixture body, 10 is a hexagon socket cylindrical head screw, 11 is a pressure plate, and 12 is a positioning plate. DETAILED DESCRIPTION

[0013] The cam grinding fixture for the camshaft with an eccentric groove structure of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0014] The cam grinding fixture with an eccentric groove structure camshaft shown in Figure 1 includes a fixture body 9, a positioning plate 12, a pressure plate 11 and a lever device. A circular hole is set in the middle of the fixture body 9, a groove is set in the middle of one end of the fixture body 9, a connecting mechanism is set at the other end of the fixture body 9, a screw hole is set on the side of the fixture body 9 at the groove end, the positioning plate 12 is set on the circular hole in the middle of the fixture body 9, a circular hole is set in the middle of the positioning plate 12, a positioning pin is set on the positioning plate 12, and the positioning pin is placed in the circular hole in the middle of the fixture body 9, the pressure plate 11 is set on the positioning plate 12, the positioning plate 12 can move parallel to the pressure plate 11 and the fixture body 9, a spring 2 is set between the positioning plate 12 and the fixture body 9 at the groove end, and the lever device is fixedly connected to the side of the fixture body 9 through the connecting plate 5.

[0015] Example 1

[0016] A circular hole is arranged in the middle of the clamp body 9, a groove is arranged in the middle of one end of the clamp body 9, a connecting mechanism is arranged at the other end of the clamp body 9, a screw hole is arranged on the side of the clamp body 9 at the groove end, a positioning plate 12 is arranged on the circular hole in the middle of the clamp body 9, a circular hole is arranged in the middle of the positioning plate 12, a positioning pin is arranged on the positioning plate 12, and the positioning pin is placed in the circular hole in the middle of the clamp body 9, a pressing plate 11 is arranged on the positioning plate 12, the positioning plate 12 can move parallel to the clamp body 9, and a positioning plate 12 is arranged between the positioning plate 12 and the clamp body 9 at the groove end. Spring 2, the lever device is that one end of the connecting plate 5 is fixedly connected to the side of the clamp body 9, the other end of the connecting plate is provided with a groove, one end of the lever 3 is fitted with the positioning plate, one end of the other end of the lever 3 is provided with a through hole corresponding to the through hole of the connecting plate 5, the cylindrical pin 4 is inserted into the through holes of the connecting plate and the lever 3 in sequence, another end of the other end of the lever 3 is folded down at 90°, a screw hole is provided at the vertical folded position, a screw hole is provided at one end of the lever 6 corresponding to the screw hole at the vertical folded position, and the lever 6 is fixedly connected to the lever 3 with a hexagon socket head screw 10.

[0017] Example 2

[0018] A circular hole is set in the middle of the clamp body 9, a groove is set in the middle of one end of the clamp body 9, a connecting mechanism is set at the other end of the clamp body 9, a screw hole is set on the side of the clamp body 9 at the groove end, a positioning plate 12 is set on the circular hole in the middle of the clamp body 9, a circular hole is set in the middle of the positioning plate 12, a positioning pin is set on the positioning plate 12, and the positioning pin is placed in the circular hole in the middle of the clamp body 9, a pressing plate 11 is set on the positioning plate 12, the positioning plate 12 can move parallel to the clamp body 9 between the pressing plate 11 and the clamp body 9, a spring 2 is set between the positioning plate 12 and the clamp body 9 at the groove end, and the lever device is that one end of the connecting plate 5 is fixedly connected to the clamp body 9, the other end of the connecting plate 5 is set with a groove, one end of the lever 3 is in contact with the positioning plate 12, and one end of the other end of the lever 3 is set to communicate with the connecting plate 5 The cylindrical pin 4 is inserted into the through holes of the connecting plate 5 and the lever 3 in sequence, and another end of the other end of the lever 3 is folded down at 90°, a screw hole is set at the vertical folded position, and then it is folded flat at 90° to be parallel to the clamp body 9, a groove is set at the end of the 90° flat fold, a screw hole is set on the 90° flat fold, and a screw hole is set on the clamp body 9 corresponding to the end groove of the 90° flat fold. One end of the screw is placed in the screw hole on the side of the clamp body 9, and the other end of the screw is connected to the nut so that the screw is placed in the end groove of the 90° flat fold. The end of the lever 6 is set to an "L" shape, and the bottom end of the "L" shape is connected to the handle. The upper part of the "L" shape is set with a screw hole and corresponds to the screw hole at the vertical folded position, and the lever 6 is fixedly connected to the lever 3 by a hexagon socket head screw 10.

[0019] The pressing plate 11 is set to be "U"-shaped, and a mortise and tenon groove is set at one end of the corresponding positioning plate 12, and the pressing plate 11 is fixed to the clamp body 9 by a hexagon socket head screw 10.

[0020] The connecting plate 5 is in the shape of a flat plate, placed on or below the lever 3 , and fixedly connected to the lever 3 via a cylindrical pin 4 .

[0021] Through the action of lever 3, press the lever 6 in the direction of the clamp body 9 to move the positioning plate 12 upward, and then install the camshaft so that the eccentric groove on the camshaft end face corresponds to the positioning pin on the positioning plate 12, and the positioning pin is placed in the eccentric groove. Release the lever 6, and the positioning plate 12 moves downward under the thrust of the spring 2. The positioning pin of the positioning plate 12 is tightly attached to the positioning surface of the eccentric groove to complete the positioning angle. Then tighten the bolt 1 in the screw hole on the side of the clamp body 9 at the groove end so that the clamp body 9 clamps the outer circle of the camshaft to complete the manual clamping of the camshaft.

[0022] The clamp body 9 is provided with two feet at the connection end with the machine tool, and screw holes are provided on the sides of the two feet. The clamp body 9 is installed on the machine tool with the hexagon socket cylindrical end set screw 7 and the hexagon nut 8, and then the grinder processes the cam of the camshaft.

Claims

1. A cam grinding fixture for a camshaft with an eccentric groove structure, comprising a fixture body (9), a positioning plate (12), a pressure plate (11) and a lever device, wherein a circular hole is arranged in the middle of the fixture body (9), a groove is arranged in the middle of one end of the fixture body (9), a connecting mechanism is arranged at the other end of the fixture body (9), a screw hole is arranged on the side of the fixture body (9) at the groove end, the positioning plate (12) is arranged on the circular hole in the middle of the fixture body (9), a circular hole is arranged in the middle of the positioning plate (12), a positioning pin is arranged on the positioning plate (12), and the positioning pin is placed in the circular hole in the middle of the fixture body (9), characterized in that: The pressure plate (11) is arranged on the positioning plate, the positioning plate (12) can move parallel to the pressure plate (11) and the clamp body (9), a spring (2) is arranged between the positioning plate (12) and the clamp body (9) at the groove end, and the lever device is fixedly connected to the side of the clamp body (9) through the connecting plate (5); after the camshaft is fixed, the positioning pin of the positioning plate is in close contact with the positioning surface of the eccentric groove of the camshaft; The lever device is characterized in that one end of a connecting plate (5) is fixedly connected to the side of a clamp body (9), a groove is arranged at the other end of the connecting plate (5), one end of a lever (3) is fitted with a positioning plate (12), one end of the other end of the lever (3) is arranged with a through hole corresponding to the through hole of the connecting plate (5), a cylindrical pin (4) is inserted into the through holes of the connecting plate (5) and the lever (3) in sequence, another end of the other end of the lever (3) is folded down at 90°, a screw hole is arranged at the vertical folded portion, and then folded flat at 90° to be parallel to the clamp body (9), a groove is arranged at the end of the 90° flat fold, a screw hole is arranged on the 90° flat fold, and a screw hole is arranged on the clamp body (9) corresponding to the groove at the end of the 90° flat fold. A screw hole is provided at one end of the lever (6) corresponding to the screw hole at the vertically folded downward portion, and the lever (6) is fixedly connected to the lever (3) by a hexagon socket head screw (10); One end of the screw rod is placed in a screw hole on the side of the clamp body (9), and the other end of the screw rod is connected to a nut, so that the screw rod is placed in the end groove of the 90° flat fold. The end of the lever (6) is set to be "L"-shaped, and the bottom end of the "L"-shaped is connected to the handle. The upper part of the "L"-shaped is provided with a screw hole corresponding to the screw hole at the vertical folded part. The lever (6) is fixedly connected to the lever (3) by a hexagon socket head screw (10).

2. The cam grinding fixture for a camshaft with an eccentric groove structure according to claim 1, characterized in that: The pressing plate (11) is set to be "U"-shaped, and a mortise and tenon groove is set corresponding to the positioning plate (12), and the pressing plate (11) is fixed to the clamp body (9) by a hexagon socket head screw (10).

3. The cam grinding fixture for a camshaft with an eccentric groove structure according to claim 1 or 2, characterized in that: The connecting plate (5) is in the shape of a flat plate, is placed on or below the lever (3), and is fixedly connected to the lever (3) via a cylindrical pin (4).

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