CN203636608U - Dedicated fixture for grinding camshaft - Google Patents

Abstract

The utility model discloses a dedicated fixture for grinding a camshaft, which comprises a clamping block and a positioning block, wherein the clamping block comprises a clamping circular arc part; the positioning block comprises a positioning circular arc part; the inner surfaces of the clamping circular arc part and the positioning circular arc part can be jointed with the shaft neck of the camshaft; a first hinge end and a second hinge end are arranged at one end of the positioning circular arc part at an interval; a positioning groove is formed in the circular arc inner side at the other end of the positioning circular arc part; the clamping block comprises a machine tool main shaft connecting part which is integrated with the clamping circular arc part; the tail end of the clamping circular arc part is a third hinge end which extends into the clearance between the first hinge end and the second hinge end, and is hinged to the first hinge end and the second hinge end through a hinge shaft; the arc length of the third hinge end is smaller than those of the first hinge end and the second hinge end; a pin shaft is fixed on the end surfaces, outside the third hinge end, of the first hinge end and the second hinge end, and is sleeved with a torsion spring between the clamping block and the positioning block. The dedicated fixture is simple in structure, convenient to operate, and high in clamping efficiency.

Description

Special clamp for camshaft grinding

Technical field

The utility model relates to a kind of fixture, while particularly relating to a kind of grinding for the fixture of clamp cam axle.

Background technology

Camshaft is generally widely used in various products and realizes the reciprocating conversion that rotatablely moves, and cam axial workpiece is also typical structure part in machining, as camshaft of car engine, air-conditioner camshaft etc.For ensureing the precision of cam, in the technical process of cam, be all designed with the technique of grinding.In grinding process, camshaft two ends are adopted to top holding out against, then adopt special fixture to stir camshaft and rotate centered by top.In prior art, owing to stirring the fixture of camshaft rotation and adopt the mode of bolt tightening clamping, therefore efficiency is low when clamping camshaft.

Therefore those skilled in the art are devoted to develop the high Special clamp for camshaft grinding of a kind of clamping efficiency.

Utility model content

Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide the high Special clamp for camshaft grinding of a kind of clamping efficiency.

For achieving the above object, the utility model provides a kind of Special clamp for camshaft grinding, comprises clamp and locating piece; Described clamp and locating piece have respectively inner surface can and locate arc sections with the clamping arc sections of camshaft journal laminating;

One end of described locating piece arc sections comprises spaced the first hinged end and the second hinged end;

The described locating piece arc sections other end circular arc inner side be provided with locating slot;

Described clamp comprises the machine tool chief axis connecting portion with described clamping arc sections one; The end of described clamping arc sections is the 3rd hinged end; Described the 3rd hinged end stretches into the gap of described the first hinged end and the second hinged end, and hinged by jointed shaft and described the first hinged end and the second hinged end;

The arc length of described the 3rd hinged end is less than the arc length of described the first hinged end and the second hinged end; Described the first hinged end and the second hinged end are fixed with bearing pin in the outside of described the 3rd hinged end end face; On described bearing pin, be set with the torsion spring between described clamp and locating piece.

Preferably, described locating slot is " V " shape groove; The central angle of the virtual circular arc that described locating slot is corresponding is 40 °-42 °.

Preferably, the distance between the virtual arcuate midway point that the bottom of described locating slot and described locating slot are corresponding is 9-12mm.

The beneficial effects of the utility model are: the utility model is simple in structure, easy to operate, and clamping efficiency is high.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model one detailed description of the invention.

Fig. 2 is the structural representation of clamp in Fig. 1.

Fig. 3 is the left TV structure schematic diagram of Fig. 2.

Fig. 4 is the structural representation of locating piece in Fig. 1.

Fig. 5 is the plan structure schematic diagram of Fig. 4.

Detailed description of the invention

Below in conjunction with drawings and Examples, the utility model is described in further detail:

As shown in Figures 1 to 5, a kind of Special clamp for camshaft grinding, comprises clamp 1 and locating piece 2, and clamp 1 and locating piece 2 have respectively inner surface can and locate arc sections 2a with the clamping arc sections 1a of camshaft journal laminating.

One end of locating piece arc sections 2a comprises spaced the first hinged end 2b and the second hinged end 2c, the locating piece arc sections 2a other end circular arc inner side be provided with locating slot 2d.Locating slot 2d is " V " shape groove, and the central angle θ of the virtual circular arc that locating slot 2d is corresponding is 41 °; Distance H between virtual arcuate midway point corresponding to the bottom of locating slot 2d and locating slot 2d is 10mm.

Clamp 1 comprises and the machine tool chief axis connecting portion 1b that clamps arc sections 1a one.The end that clamps arc sections 1a is the 3rd hinged end 1c, and the 3rd hinged end 1c stretches into the gap of the first hinged end 2b and the second hinged end 2c, and it is hinged to pass through jointed shaft 3 and the first hinged end 2b and the second hinged end 2c.

The arc length of the 3rd hinged end 1c is less than the arc length of the first hinged end 2b and the second hinged end 2c, the first hinged end 2b and the second hinged end 2c are fixed with bearing pin 4 in the outside of the 3rd hinged end 1c end face, are set with the torsion spring 5 between clamp 1 and locating piece 2 on bearing pin 4.

The reserved location convex closure corresponding with locating slot 2d on camshaft.When grinding raised wheel shaft, the two ends of camshaft are withstood with top, then make clamp 1 relative positioning piece 2 be rotated counterclockwise, thereby fixture is opened so that locate convex closure and coordinate with locating slot 2d, finally unclamp clamp 1, make clamp 1 automatic and camshaft laminating clamping under the effect of torsion spring 5.Finally locating piece 1 is connected with machine tool chief axis, when grinding, fixture drives camshaft rotation under the effect of machine tool chief axis.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in by the determined protection domain of claims.

Claims (3)

1. a Special clamp for camshaft grinding, is characterized in that: comprise clamp (1) and locating piece (2); Described clamp (1) and locating piece (2) have respectively inner surface can and locate arc sections (2a) with the clamping arc sections (1a) of camshaft journal laminating;

One end of described locating piece arc sections (2a) comprises spaced the first hinged end (2b) and the second hinged end (2c);

Described locating piece arc sections (2a) other end circular arc inner side be provided with locating slot (2d);

Described clamp (1) comprises the machine tool chief axis connecting portion (1b) with described clamping arc sections (1a) one; The end of described clamping arc sections (1a) is the 3rd hinged end (1c); Described the 3rd hinged end (1c) stretches into the gap of described the first hinged end (2b) and the second hinged end (2c), and hinged with described the first hinged end (2b) and the second hinged end (2c) by jointed shaft (3);

The arc length of described the 3rd hinged end (1c) is less than the arc length of described the first hinged end (2b) and the second hinged end (2c); Described the first hinged end (2b) and the second hinged end (2c) are fixed with bearing pin (4) in the outside of described the 3rd hinged end (1c) end face; On described bearing pin (4), be set with the torsion spring (5) being positioned between described clamp (1) and locating piece (2).

2. Special clamp for camshaft grinding as claimed in claim 1, is characterized in that: described locating slot (2d) is " V " shape groove; The central angle (θ) of the virtual circular arc that described locating slot (2d) is corresponding is 40 °-42 °.

3. Special clamp for camshaft grinding as claimed in claim 1 or 2, is characterized in that: the distance (H) between virtual arcuate midway point corresponding to the bottom of described locating slot (2d) and described locating slot (2d) is 9-12mm.

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