CN101758257A

CN101758257A - Three-jaw chuck

Info

Publication number: CN101758257A
Application number: CN200910252820A
Authority: CN
Inventors: 余昭华; 周本峰
Original assignee: 芜湖长胜机械制造有限公司
Priority date: 2009-11-28
Filing date: 2009-11-28
Publication date: 2010-06-30
Also published as: CN101758257B

Abstract

The invention discloses a three-jaw chuck, which comprises a chuck body and three jaws with the same structure, wherein the chuck body is provided with a workpiece pressing structure; the workpiece pressing structure comprises a frame-shaped sliding seat, a small shaft and an eccentric hand wheel rotating around the small shaft; the frame-shaped sliding seat is provided with an upper opening plate and a lower sliding strip which is parallel to and connected into a whole with the upper opening plate; the small shaft is fixed on the upper opening plate of the frame-shaped sliding seat; the lower sliding strip makes reciprocating displacement along a track groove arranged on the chuck body; and an extended line of a centre line of the track groove on the chuck body is intersected with a centre line of the chuck body. The three-jaw chuck adopting the structure is convenient to use, can prevent a held workpiece blank from loosening when workpiece blanks are clamped, improves the acceptability of lathe machining and increases the range of the lathe machining.

Description

A kind of scroll chuck

Technical field

The present invention relates to turning attachment, relate in particular to a kind of scroll chuck.

Background technology

The machined into workpiece uses scroll chuck usually, scroll chuck commonly used comprises chuck body and three claws, in use, be the polymorphic structure of similar equilateral triangle shape because workpiece blank has, the sliding phenomenon of blank pine when adding trade union appearing at holding workpiece on lathe influences the qualification rate of machined into.

Summary of the invention

Technical problem to be solved by this invention is: a kind of scroll chuck is provided, and this kind scroll chuck can avoid the holding workpiece blank the sliding phenomenon of pine to occur, improves the qualification rate of machined into.

Solve this technical problem, technical scheme of the present invention is: a kind of scroll chuck, the claw that comprises chuck body and three same structures, described chuck body is provided with workpiece pressing mechanism, this workpiece pressing mechanism comprises the shaped as frame slip base, little axle and the eccentric handwheel that rotates around little axle, described shaped as frame slip base has upper shed plate and the following slippage bar that fuse parallel with the upper shed plate, described little axle is fixed in the upper shed plate of shaped as frame slip base, the rail groove shift reciprocately that described down slippage bar is provided with on the chuck body, the extended line of the center line of the rail groove on the described chuck body and the center line of chuck body are crossing.

The arranged outside of the following slippage bar of described shaped as frame slip base has vertical rectangular opening, described upper shed plate has the support strip of the vertical rectangular opening of slippage bar under the putting in of downward extension, have the horizontal through hole at a plurality of intervals on the support strip, be provided with the bearing pin of connection between the support strip of described slippage bar down and upper shed plate.

Described each claw is formed by claw Connection Block and the claw clamping part that is fixed in claw Connection Block inboard, and described claw clamping part has swallow-tailed groove.

The swallow-tailed groove of the claw clamping part of described each claw is provided with the claw clamping cushion block of symmetry.

The angle that the dovetail shaped groove of described claw clamping part forms is 130 degree.

A kind of scroll chuck of the present invention adopts such structure, and is simple in structure, easy to use, can avoid the holding workpiece blank the sliding phenomenon of pine to occur, improved the qualification rate of machined into, increased the machined into scope.

Description of drawings

Fig. 1 is the structural representation of a kind of scroll chuck of the present invention;

Fig. 2 analyses and observe enlarged diagram for A-A shown in Figure 1;

In Fig. 1, Fig. 2,1, chuck body; 2, claw clamping cushion block; 3, claw Connection Block; 4, claw clamping part; 5, workpiece pressing mechanism; 6, rail groove; 7, following slippage bar; 8, bearing pin; 9, upper shed plate; 10, little axle; 11, eccentric handwheel.

The specific embodiment

As Fig. 1, shown in Figure 2, a kind of scroll chuck, the claw that comprises chuck body 1 and three same structures, described chuck body 1 is provided with workpiece pressing mechanism 5, this workpiece pressing mechanism 5 comprises the shaped as frame slip base, little axle 10 and the eccentric handwheel 11 that rotates around little axle 10, the shaped as frame slip base has upper shed plate 9 and the following slippage bar 7 that fuse parallel with upper shed plate 9, the arranged outside of the following slippage bar 7 of shaped as frame slip base has vertical rectangular opening, the upper shed plate 9 of shaped as frame slip base has the support strip of slippage bar 7 vertical rectangular openings under the putting in of downward extension, have the horizontal through hole at a plurality of intervals on the support strip of upper shed plate 9, the bearing pin 8 that has connection between the support strip of following slippage bar 7 and upper shed plate 9, little axle 10 is fixed in the upper shed plate 9 of shaped as frame slip base, rail groove 6 shift reciprocatelies that following slippage bar 7 is provided with on the chuck body 1, the extended line of the center line of the rail groove 6 of chuck body 1 and the center line of chuck body 1 are crossing.Each claw is formed by claw Connection Block 3 and the claw clamping part 4 that is fixed in claw Connection Block 3 inboards, claw clamping part 4 has swallow-tailed groove, the swallow-tailed groove of the claw clamping part of individual claw is provided with the claw clamping cushion block 2 of symmetry, and the angle that the dovetail shaped groove of pawl clamping part forms is 130 degree.

During use, earlier the spacing of shaped as frame slip base and chuck body is adjusted, again with the shaped as frame slip base along the outside translation of chuck body rail groove, the workpiece that will process is put on the scroll chuck then, three-jaw is inwardly closed up the workpiece that clamping will be processed, and then with the shaped as frame slip base along the inside translation of chuck body rail groove, the rotating eccentricity handwheel, the workpiece that will process clamps.Such structure has increased workpiece pressing mechanism, when the polymorphic structure workpiece of the similar equilateral triangle shape of clamping, can avoid the holding workpiece blank the sliding phenomenon of pine to occur, has increased the machined into scope, has improved the qualification rate of machined into.

Claims

1. scroll chuck, the claw that comprises chuck body (1) and three same structures, it is characterized in that: described chuck body (1) is provided with workpiece pressing mechanism (5), this workpiece pressing mechanism (5) comprises the shaped as frame slip base, little axle (10) and the eccentric handwheel (11) that rotates around little axle (10), described shaped as frame slip base has upper shed plate (9) and the following slippage bar (7) that fuse parallel with upper shed plate (9), described little axle (10) is fixed in the upper shed plate (9) of shaped as frame slip base, described slippage bar (7) is down gone up rail groove (6) shift reciprocately that is provided with along chuck body (1), and the extended line of the center line of the rail groove (6) of described chuck body (1) and the center line of chuck body (1) intersect.

2. a kind of scroll chuck according to claim 1, it is characterized in that: the arranged outside of the following slippage bar (7) of described shaped as frame slip base has vertical rectangular opening, the upper shed plate (9) of described shaped as frame slip base has under the putting in of downward extension the vertically support strip of rectangular opening of slippage bar (7), have the horizontal through hole at a plurality of intervals on the support strip of described upper shed plate (9), be provided with the bearing pin (8) of connection between the support strip of described slippage bar (7) down and upper shed plate (9).

3. a kind of scroll chuck according to claim 1 and 2, it is characterized in that: described each claw is by claw Connection Block (3) and be fixed in inboard claw clamping part (4) composition of claw Connection Block (3), and described claw clamping part (4) has swallow-tailed groove.

4. a kind of scroll chuck according to claim 3 is characterized in that: the swallow-tailed groove of the claw clamping part of described each claw is provided with the claw clamping cushion block (2) of symmetry.

5. a kind of scroll chuck according to claim 4 is characterized in that: the angle that the dovetail shaped groove of described claw clamping part forms is 130 degree.