CN203636603U

CN203636603U - Special fixture for grinding of cam shaft

Info

Publication number: CN203636603U
Application number: CN201320723641.0U
Authority: CN
Inventors: 李文政
Original assignee: CHONGQING JINQIAO MACHINE MANUFACTURING CO LTD
Current assignee: CHONGQING JINQIAO MACHINE MANUFACTURING CO LTD
Priority date: 2013-11-16
Filing date: 2013-11-16
Publication date: 2014-06-11
Anticipated expiration: 2023-11-16

Abstract

The utility model discloses a special fixture for grinding of a cam shaft. The special fixture comprises a clamping block and a positioning block, wherein the clamping block and the positioning block are provided with a clamping arc part and a positioning arc part which have the inner surfaces capable of fitting the shaft neck of the cam shaft respectively; the clamping block comprises a machine tool main shaft connecting part integrated with the clamping arc part; the tail end of the clamping arc part comprises a first hinged end and a second hinged end which are arranged at an interval; one end of the positioning arc part is a third hinged end; a positioning groove is formed in the arc inner side at the other end of the positioning arc part; the third hinged end extends into a gap between the first hinged end and the second hinged end and is hinged to the first hinged end and the second hinged end through a hinged shaft; the arc length of the third hinged end is smaller than that of the first hinged end and the second hinged end; the first hinged end and the second hinged end are fixed with a pin shaft on the outer side of the end surface of the third hinged end; the pin shaft is sleeved with a torsion spring between the clamping block and the positioning block. The special fixture is simple in structure, convenient to operate and high in clamping efficiency.

Description

A kind of 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 guaranteeing 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; Described clamp comprises the machine tool chief axis connecting portion with described clamping arc sections one; The end of described clamping arc sections is spaced the first hinged end and the second hinged end; One end of described locating piece arc sections is the 3rd hinged end; The described locating piece arc sections other end circular arc inner side be provided with locating slot; 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.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model one specific embodiment.

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.

The specific embodiment

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.

Clamp 1 comprises and clamps the machine tool chief axis connecting portion 1b of arc sections 1a one, and the end of clamping arc sections 1a is spaced the first hinged end 1c and the second hinged end 1d.

One end of locating piece arc sections 2a is the 3rd hinged end 2c, the locating piece arc sections 2a other end circular arc inner side be provided with locating slot 2b.Locating slot 2b is " V " shape groove, and the central angle θ of the virtual circular arc that locating slot 2b is corresponding is 41 °; Distance H between virtual arcuate midway point corresponding to the bottom of locating slot 2b and locating slot 2b is 10mm.

The 3rd hinged end 2c stretches into the gap of the first hinged end 1c and the second hinged end 1d, and it is hinged to pass through jointed shaft 3 and the first hinged end 1c and the second hinged end 1d.

The arc length of the 3rd hinged end 1c is less than the arc length of the first hinged end 1c and the second hinged end 1d, the first hinged end 1c and the second hinged end 1d 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 2b 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 2b, 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

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;

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 spaced the first hinged end (1c) and the second hinged end (1d);

One end of described locating piece arc sections (2a) is the 3rd hinged end (2c); Described locating piece arc sections (2a) other end circular arc inner side be provided with locating slot (2b); Described the 3rd hinged end (2c) stretches into the gap of described the first hinged end (1c) and the second hinged end (1d), and hinged with described the first hinged end (1c) and the second hinged end (1d) 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 (1c) and the second hinged end (1d); Described the first hinged end (1c) and the second hinged end (1d) 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 (2b) is " V " shape groove; The central angle (θ) of the virtual circular arc that described locating slot (2b) 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 (2b) and described locating slot (2b) is 9-12mm.