CN201227695Y

CN201227695Y - Power chuck

Info

Publication number: CN201227695Y
Application number: CNU2008201168739U
Authority: CN
Inventors: 顾学华
Original assignee: CHANGZHOU BEUT MACHINERY MANUFACTURE Co Ltd
Current assignee: CHANGZHOU BEUT MACHINERY MANUFACTURE Co Ltd
Priority date: 2008-05-13
Filing date: 2008-05-13
Publication date: 2009-04-29
Anticipated expiration: 2018-05-13

Abstract

The utility model discloses a power chuck which is used in a machine tool. The power chuck comprises a housing, a piston and a power wedge block. The power wedge block is in sliding fit with a front cover; the piston is installed in the housing; a first cavity is formed between the back part of the piston and the housing; a second cavity is formed between the front part of the piston and the front cover; the piston is provided with a convex wedge; a flume which is matched with the convex wedge is formed on the power wedge block; the front section of the concave wedge is a high-inclination wedge body, and the back section thereof is a low-inclination wedge body; and a surface which is matched with the high-inclination wedge body of the concave wedge, and a surface which is matched with the low-inclination wedge body of the concave wedge are formed on the flume of the power wedge block. The power chuck possesses a long jaw journey, is applicable to a clamping with a transition workpiece and has a broad application range.

Description

Power chuck

Technical field

The utility model relates to a kind of lathe power chuck.

Background technology

The applicant's application number is 200720040890.4, efficient aerodynamic chuck by name in first to file, has following design feature: have protruding wedge on the piston, has the skewed slot that is slidingly matched with protruding wedge on the power voussoir, protruding wedge produced relative slip with the skewed slot of power voussoir when piston moved, make on power voussoir and the power voussoir fixing claw shift in position, thereby clamp or unclamp workpiece.This air spider is owing to be subjected to the angle of inclination of protruding wedge and power voussoir and the restriction of piston stroke, and the claw stroke is less, and those have the clamping of concentric reducer workpiece (major part in chuck, the workpiece of microcephaly outside chuck) incompatibility, and the scope of application is not wide.

Summary of the invention

The purpose of this utility model is to provide a kind of power chuck with big claw stroke.

In order to achieve the above object, the technical solution of the utility model is: a kind of power chuck, comprise shell, piston and power voussoir, power voussoir and protecgulum are slidingly matched, piston is cased, form first chamber between piston rear portion and the shell, form second chamber between piston front portion and the protecgulum, have protruding wedge on the piston, have the skewed slot that is slidingly matched with protruding wedge on the power voussoir, the leading portion of protruding wedge is the wedge of big gradient, and back segment is the wedge of little gradient, have the face with the wedge coupling of the big gradient of protruding wedge on the skewed slot of power voussoir, and have the face with the wedge coupling of the little gradient of protruding wedge.

After adopting said structure, because the leading portion of protruding wedge is the wedge of big gradient, back segment is the wedge of little gradient, has face on the skewed slot of power voussoir with the wedge coupling of the big gradient of protruding wedge, and has face with the wedge coupling of the little gradient of protruding wedge, this just makes chuck when clamping or unclamping workpiece, claw has big trip segment corresponding with big gradient and the normal travel section corresponding with little gradient, big trip segment plays stroke increase effect, the utlity model has big claw stroke thereby make, can adapt to the clamping that those have the concentric reducer workpiece, the scope of application is wide.

Description of drawings

The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model.

Fig. 1 is the Facad structure schematic diagram of power chuck of the present utility model;

Fig. 2 is the cutaway view of Fig. 1 along the A-A line, also is the state diagram of the utility model when moving outside the power voussoir;

Fig. 3 is the state diagram of the utility model when moving in the power voussoir;

Fig. 4 is the structure of piston schematic diagram in the utility model;

Fig. 5 is the cutaway view of Fig. 4 along the B-B line;

Fig. 6 is the structural representation of the power voussoir in the utility model;

Fig. 7 is Fig. 6 vertical view;

Fig. 8 is the left view of Fig. 6;

Fig. 9 is the structural representation of the protecgulum in the utility model;

Figure 10 is the cutaway view of Fig. 9 along the C-C line;

Figure 11 is the cutaway view of Fig. 9 along the D-D line.

The specific embodiment

As Fig. 1,2,3,4,5,6, shown in 7, power chuck of the present utility model, comprise shell 2, piston 3 and power voussoir 4, power voussoir 4 is slidingly matched with protecgulum 5, piston 3 is contained in the shell 2, form first chamber 8 between piston 3 rear portions and the shell 2, form second chamber 7 between piston 3 front portions and the protecgulum 5, have protruding wedge 3-1 on the piston 3, has the skewed slot 4-1 that is slidingly matched with protruding wedge 3-1 on the power voussoir 4, the leading portion of protruding wedge 3-1 is the wedge 3-1-1 of big gradient, back segment is the wedge 3-1-2 of little gradient, have the face 4-1-1 with the wedge 3-1-1 coupling of the big gradient of protruding wedge 3-1 on the skewed slot 4-1 of power voussoir 4, and have the face 4-1-2 with the wedge 3-1-2 coupling of the little gradient of protruding wedge.

As shown in Figure 1, protecgulum 5 is fixedlyed connected with shell 2 by trip bolt 6.Certainly, shell 2 and protecgulum 5 also can be made one

Shown in Fig. 2,9,10,11, the interior heavy shape chamber 5-3 that protecgulum 5 is provided with T type chute 5-1 radially and moves for protruding wedge 3-1; Shown in Fig. 6,7,8, the both sides of power voussoir 4 have the sliding protruding wing 4-2 that joins with T type chute 5-1.Power voussoir 4 can be fixedlyed connected with claw, also can be made as one with claw.

Shown in Fig. 6,7, the skewed slot 4-1 on the power voussoir 4 drives on the protruding wing 4-2 in both sides; Shown in Fig. 4,5, have 6 protruding wedge 3-1 on the piston 3 and constitute 3 pairs, every couple of protruding wedge 3-1 is all parallel to each other, and the 3 couples of protruding wedge 3-1 can be respectively be slidingly fitted with the skewed slot 4-1 of 3 power voussoir 4 both sides.The protruding wedge 3-1 of piston 3 can be 2～8 pairs, and the quantity of power voussoir 4 can be corresponding 2～8.

As shown in Figure 1, 2, 3, for when processing longer bar, bar can pass through cylinder, thereby finish self-feeding, between shell 2 and the protecgulum 5 core bar 9 is housed fixedly, piston 3 slip caps are contained on the core bar 9, and protecgulum 5 middle parts have perforate 5-4, core bar 9 has the through hole 9-3 that the perforate 5-4 with protecgulum 5 middle parts connects, and through hole 9-3 leads to the outside of shell 2.Certainly,, also through hole 9-3 can be do not established on the core bar 9, also perforate 5-4 can be do not established on the protecgulum 5 if do not need the longer bar of processing.The utility model also can not established core bar 9.

Shown in Fig. 2,3, in the mesopore 3-3 of piston 3 sealing ring 1 is housed.

Shown in Fig. 2,3, have the first air flue 9-2 and the second air flue 9-4 on the core bar 9, the first air flue 9-2 leads to first chamber, 8, the second air flue 9-4 and leads to second chamber 7.The first air flue 9-2 and the second air flue 9-4 also can be located on the shell 2.

Shown in Fig. 2,3,4,5,9,10, to move with one heart in order to make piston 3, piston 3 front portions have counterbore 3-2, and protecgulum 5 rear portions have boss 5-2, and the counterbore 3-2 of boss 5-2 and piston 3 is slidingly matched, and sealing ring 10 is housed on the boss 5-2.

Shown in Fig. 3,4, when the utility model uses, when the first air flue 9-2 of core bar 9 is in the air inlet state, gas enters first chamber 8, promoting piston 3 moves right, the wedge 3-1-2 of little gradient of the protruding wedge 3-1 of piston 3 is slided on the face 4-1-2 of power voussoir 4 skewed slot 4-1, and propulsion power voussoir 4 moves to chuck hub, thus clamping work pieces; When the second air flue 9-4 of core bar 9 is in the air inlet state, gas enters second chamber 7, promote piston 3 to left movement, the big gradient wedge 3-1-1 of the protruding wedge 3-1 of piston 3 is slided on the face 4-1-1 of power voussoir 4 skewed slot 4-1, propulsion power voussoir 4 is peripheral mobile to chuck, thereby unclamps workpiece fast.

Power chuck of the present utility model can be an air spider, also can be the chuck that surges.

Claims

1, a kind of power chuck, comprise shell (2), piston (3) and power voussoir (4), power voussoir (4) is slidingly matched with protecgulum (5), piston (3) is contained in the shell (2), form first chamber (8) between piston (3) rear portion and the shell (2), form second chamber (7) between piston (3) front portion and the protecgulum (5), have protruding wedge (3-1) on the piston (3), have the skewed slot (4-1) that is slidingly matched with protruding wedge (3-1) on the power voussoir (4), it is characterized in that:

The leading portion of a, protruding wedge (3-1) is the wedge (3-1-1) of big gradient, and back segment is the wedge (3-1-2) of little gradient,

Have the face (4-1-1) with wedge (3-1-1) coupling of the big gradient of protruding wedge (3-1) on the skewed slot (4-1) of b, power voussoir (4), and have the face (4-1-2) with wedge (3-1-2) coupling of the little gradient of protruding wedge (3-1).

2, power chuck according to claim 1 is characterized in that: protecgulum (5) is provided with radially T type chute (5-1) and interior heavy shape chamber (5-3), and the both sides of power voussoir (4) have and the sliding protruding wing (4-2) of joining of T type chute (5-1).

3, power chuck according to claim 3, it is characterized in that: the skewed slot (4-1) on the power voussoir (4) is driveed on the protruding wings in both sides (4-2), have 6 protruding wedges (3-1) on the piston (3) and constitute 3 pairs, every pair of protruding wedge (3-1) is all parallel to each other, and 3 pairs of protruding wedges (3-1) can be respectively be slidingly fitted with the skewed slot (4-1) of 3 power voussoirs (4) both sides.