CN201799637U

CN201799637U - Three-jaw chuck for processing crooked neck

Info

Publication number: CN201799637U
Application number: CN2010205102225U
Authority: CN
Inventors: 蒋瑞元; 王安庆
Original assignee: Chongqing Meixin Mile Shafts Co Ltd
Current assignee: Chongqing Meixin YiShen Machinery Manufacturing Co., Ltd.
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2011-04-20
Anticipated expiration: 2020-08-31

Abstract

The utility model relates to a three-jaw chuck for processing a crooked neck, which is used for clamping a crankshaft when the crooked neck of the crankshaft of a gasoline engine is turned. The three-jaw chuck for processing the crooked neck comprises a chuck body and three jaws, wherein an eccentric cushion block is respectively welded on two jaws, and a limit stop is fixed on one eccentric cushion block. The three-jaw chuck for processing the crooked neck has very simple structure and low manufacturing cost. Moreover, the clamping operation of the crankshaft is convenient and easy, and the processing quality of the crooked neck can be completely ensured.

Description

Bent neck processing scroll chuck

Technical field

The utility model relates to lathe accessories, particularly carries out turning at the bent neck to gasoline engine crank and adds man-hour, is used for the scroll chuck of bent axle clamping.

Background technology

Gasoline engine crank is made up of 8,10, two cranks 9 of left and right main shaft and the bent neck 11 that is connected between two cranks 9, as Figure 11 and shown in Figure 12, left and right

main shaft

8,10 coaxial lines, parallel with bent neck 11, separated by a distance between left and right main-shaft axis and the bent neck axis.In that being carried out turning, bent neck adds man-hour, because main-shaft axis and bent neck axis be not on same straight line, so must adopt eccentric fixture to carry out clamping.The complex structure of existing eccentric fixture, the debugging effort of remodeling, the cost of manufacture height, and the clamping of bent axle is cumbersome during operation.

Summary of the invention

The purpose of this utility model provides a kind of bent neck processing scroll chuck, adds man-hour in that bent neck is carried out turning, with its clamping bent axle, can make the clamping of bent axle easy to operate simply.

Bent neck processing described in the utility model comprises chuck body and three claws with scroll chuck, three claws are installed on the chuck body, can move radially along chuck body simultaneously, respectively be welded with an eccentric cushion block on two claws therein, the front end of the front end of two eccentric cushion blocks and another claw formed Clamping Center line and the chuck body axis distance of being separated by, and between this distance and the main-shaft axis of intending machining crankshafts and the bent neck axis apart from consistent; Be fixed with positive stop on the eccentric cushion block therein, the position of positive stop on eccentric cushion block should be satisfied: when the main shaft of intending machining crankshafts by two eccentric cushion blocks and the clamping of another claw, and when crank contacts with positive stop, bent neck axis just in time with the chuck body dead in line.

With the right main shaft clamping of bent axle between the clamping face of the clamping face of two eccentric cushion blocks and another claw, do not clamp earlier, turning crankshaft, crank is resisted against on the positive stop with after positive stop contacts, again bent axle is clamped, simultaneously, tail stock eccentric top headed in the left main shaft end face centre bore of bent axle, the clamping of bent axle is finished in then bent neck axis and chuck body dead in line.

Bent neck processing described in the utility model has increased by two eccentric cushion blocks and a positive stop with scroll chuck on the basis of existing scroll chuck, so structure is very simple, cost of manufacture is cheap, and the clamping of bent axle is easy to operate easily, can guarantee the crudy of bent neck fully.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

The master that Fig. 1 processes with scroll chuck for bent neck described in the utility model looks schematic diagram;

Fig. 2 is the front view of claw (be fixed with on the claw of positive stop and offer a screwed hole, be not shown);

Fig. 3 is the right view of Fig. 2;

Fig. 4 is the vertical view of Fig. 2;

Fig. 5 is the front view of eccentric cushion block;

Fig. 6 is the right view of Fig. 5;

Fig. 7 is the vertical view of Fig. 5;

Fig. 8 is the front view of positive stop;

Fig. 9 is the vertical view of Fig. 8;

Figure 10 is the view of bent axle clamping on this scroll chuck;

Figure 11 is for intending the front view of machining crankshafts;

Figure 12 is the left view of Figure 11.

The specific embodiment

To shown in Figure 10, this song neck processing comprises that with scroll

chuck chuck body

1 and 2, three claws 2 of three claws are installed on the chuck body 1, can move radially along chuck body 1 simultaneously as Fig. 1.The clamping face 7 that respectively is welded with the front end of 3, two eccentric cushion blocks 3 of an eccentric cushion block on two claws 2 therein is circular arc, and its radian is consistent with the radian of intending the right main shaft of machining crankshafts 10 clamping positions; The clamping face 6 of the front end of another claw 2 is circular arc, and its radian is also consistent with the radian of intending the right main shaft of machining crankshafts 10 clamping positions.Between the front end of the front end of two eccentric cushion blocks 3 and another claw 2 formed Clamping Center line and the chuck body 1 axis distance of being separated by, this distance and the main-shaft axis of intending machining crankshafts and bent neck 11 axis apart from consistent.Be fixed with positive stop 4 with screw 5 on the eccentric cushion block 3 therein, the position of positive stop 4 on eccentric cushion block 3 should be satisfied: when the right main shaft 10 of intending machining crankshafts by two eccentric cushion blocks 3 and 2 clampings of another claw, and when crank 9 contacts with positive stop 4, bent neck 11 axis just in time with chuck body 1 dead in line.

Claims

1. bent neck processing scroll chuck, comprise chuck body (1) and three claws (2), three claws are installed on the chuck body, can move radially along chuck body simultaneously, it is characterized in that: respectively be welded with an eccentric cushion block (3) on two claws therein, the front end of the front end of two eccentric cushion blocks and another claw formed Clamping Center line and the chuck body axis distance of being separated by, and between this distance and the main-shaft axis of intending machining crankshafts and bent neck (11) axis apart from consistent; Be fixed with positive stop (4) on the eccentric cushion block therein, the position of positive stop on eccentric cushion block should be satisfied: when the main shaft of intending machining crankshafts by two eccentric cushion blocks and the clamping of another claw, and when crank contacts with positive stop, bent neck axis just in time with the chuck body dead in line.