CN201900283U

CN201900283U - Six-jaw double-linkage self-centering chuck

Info

Publication number: CN201900283U
Application number: CN2010202074435U
Authority: CN
Inventors: 杨振宇; 张永健
Original assignee: Changzheng Machinery Factory China Aerospace Science and Technology Corp
Current assignee: Changzheng Machinery Factory China Aerospace Science and Technology Corp
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2011-07-20
Anticipated expiration: 2020-05-28

Abstract

The utility model discloses a six-jaw double-linkage self-centering chuck. The six-jaw double-linkage self-centering chuck comprises a drive component installed between a front end cover and a rear end cover, wherein the drive component consists of a first sliding block and a second sliding block which are hinged by a floating lever; a straight pin is arranged at one end of the first sliding block, a square sliding block is arranged at the other end of the first sliding block, an inclined T-shaped boss is arranged at the lower end of the second sliding block, the square sliding block of the first sliding block is embedded into a straight groove at the back of a bottom jaw and then meshed with the straight groove, the inclined T-shaped boss at the lower end of the second sliding block is embedded into three inclined T-shaped grooves evenly distributed on a round wedge in the circumferential direction and then meshed with the inclined T-shaped grooves, and one square end at the upper part is embedded into three radial straight grooves and then meshed with the radial straight grooves; the round wedge is assembled in an inner hole of the rear end cover to make axially free slip; six bottom jaws are respectively inserted into six radial T-shaped grooves evenly distributed on the front end cover in the circumferential direction and are meshed to drive by the drive component. The chuck can realize the good centering and clamping performance to the parts of a revolving body and can effectively reduce chucking deformation of the weak-rigidity thin wall part, and therefore has the positive effect on promoting and implementing process standardization.

Description

Six-claw double-linkage self-centering chuck

Technical field

The utility model relates to the centring means of revolving parts on a kind of Metal Cutting Machine Tool, particularly relates to a kind of six-claw double-linkage self-centering chuck.

Background technology

The concrete structure of existing centering chuck roughly has following several at present:

1. three-jaw self-centering chuck

Three-jaw self-centering chuck roughly is divided into parcel formula, the fast formula of wedge, lever type, several structure types of helical teeth formula according to its kind of drive, operation principle is simple and reliable, all be to utilize the various kind of drive to realize the entad motion synchronously of three-jaw, and then the centering that realizes part clamps, its major defect is that corpus unguis follows 3 contacts area of part little and disperse, and causes part stress uneven and cause radial deformation big.Though can solve problem of workpiece deformation after adding the soft pawl of weldering, use still inconvenience: at first soft pawl is difficult for standardized production, need manufacture to make the manufacturing cycle long; Secondly, though soft pawl contact area is bigger, contact is also unreliable, does not cause centering precision high and need often join car to keep its centering precision; Moreover common one secondary soft pawl is the workpiece of a corresponding size only, uses dumbly, and flexibility is poor, also can increase production cost.

2. six pawls, six linkage self-centering chucks

It is not clearly that six pawls, six linkage self-centering chucks and three-jaw self-centering chuck are distinguished on principle and structure, and it increases other three pawls simply and forms on the basis of three-claw interlocking.From mechanism kinematic, scroll chuck and six pawls, six interlock chucks all have only a freedom of motion, therefore three-claw interlocking meets three points centering requirement on the technology, just locate fully, the interlock of six pawls then belonged to mount, only be applicable to the mount of crossing of weak rigidity part, and for good rigidly such as solid revolving parts can cause on the contrary feeling relieved unreliable, therefore have limitation in the use too.

3. six-claw double-linkage self-centering chuck

Six-claw double-linkage self-centering chuck has solved the technology standard of six dog chuck multijaws centering theoretically at all.Six claws float in twos and not only locate fully but also can guarantee that each claw contacts with the reliable of workpiece, but its system and inner structure form are comparatively complicated.

The utility model content

The purpose of this utility model just provides a kind of simple in structure, can solve the six-claw double-linkage self-centering chuck of above-mentioned prior art weak point fully.

The technical solution of the utility model is: a kind of six-claw double-linkage self-centering chuck comprises forward flange, drive end bearing bracket, end pawl, transmission component, circle voussoir, rear end cap, rear flange; Forward and backward end cap is located the back mutually and is connected and fixed by screw, and forward and backward flange cooperates the back, location fixedly connected by screw respectively with forward and backward end cap, and rear end cap one end face is evenly offered three radially straight troughs; Transmission component is made up of first slide block, floating lever rod and second slide block, one end of first slide block is a straight pin, the other end is a square slider, second slide block is a cuboid, an end wherein is oblique T shape boss, hinged first slide block of floating lever rod two ends symmetry, the centre position is provided with straight pin and is hinged on floating lever rod upper surface centre position on second slide block; The circle voussoir is the cylinder that the center has circular hole, along the face of cylinder evenly offer three with second slide block on the axial oblique T-slot that mates of oblique T shape boss; The oblique T shape boss of transmission component by the second slide block end matches with oblique T-slot on the circle voussoir face of cylinder, and can slide relatively therein; The square groove that square slider on the setting of the pawl back side, the end and first slide block is complementary; Drive end bearing bracket is the porose disc in center, uniform six T-slots radially of one end, insert an end pawl in each T-slot, the drive end bearing bracket other end is with respect to uniform three grooves that are complementary with floating lever rod of centre bore, the through hole that communicates with T-slot is offered at two ends in the groove, and this through hole square groove at the pawl back side, the corresponding end just in time; The floating lever rod of transmission component is assemblied in the groove of drive end bearing bracket, square slider on first slide block just in time embeds in the square groove at the pawl back side, the end, simultaneously in the straight trough that is partially submerged into rear end cap of second slide block away from oblique T shape boss, the circle voussoir is assemblied in the rear end cap endoporus, and can axially be free to slide with respect to endoporus.

Advantage of the present utility model is: can realize that good centering clamps to revolving parts, the centering of being convenient to weak rigidity thin-walled is installed, and reduces the distortion that is installed; Can use the standard claw, shorten and produce the preparatory period; Simple and compact for structure, can be used as the standard configuration of high-end lathe or turning center, replace traditional scroll chuck.

Description of drawings

Fig. 1 is present embodiment assembling process diagram one;

Fig. 2 is present embodiment assembling process diagram two;

Fig. 3 is present embodiment assembling process diagram three;

Fig. 4 is present embodiment assembling process diagram four;

Fig. 5 is present embodiment assembling process diagram five;

Fig. 6 is present embodiment assembling process diagram six;

Fig. 7 is the present embodiment assembling structural representation after finishing.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and the specific embodiments.

To shown in Figure 7, a kind of six-claw double-linkage self-centering chuck comprises forward flange 6, drive end bearing bracket 7, end pawl 5, transmission component, circle voussoir 4, rear end cap 8, rear flange 9 as Fig. 1; Forward and backward

end cap

7,8 is connected and fixed by screw the back, location mutually, and forward and backward flange 6,9 cooperates the back, location fixedly connected by screw respectively with forward and

backward end cap

7,8, and rear end cap 8 one end faces are evenly offered three radially straight troughs 801;

As shown in Figure 1, transmission component is made up of first slide block 2, floating lever rod 1 and second slide block 3, wherein floating lever rod 1 profile lacks shape for circle, its two ends, left and right sides rounding, circle lacks corresponding central angle less than 180 °, one end of first slide block 2 is a straight pin 202, the other end is a square slider 201, second slide block 3 is a cuboid, an end wherein is oblique T shape boss 301, the centre position is provided with straight pin and is hinged on floating lever rod 1 upper surface centre position on hinged first slide block, 2, the second slide blocks 3 of floating lever rod 1 two ends symmetry;

As shown in Figures 2 and 3, circle voussoir 4 has the cylinder of circular hole for the center, along the face of cylinder evenly offer three with second slide block 3 on the axial oblique T-slot 401 of oblique T shape boss 301 couplings, tiltedly the length of T shape boss 301 is less than the length of oblique T-slot 401; The oblique T shape boss 301 of transmission component by second slide block, 3 ends matches with oblique T-slot 401 on circle voussoir 4 faces of cylinder, and tiltedly T shape boss 301 can tiltedly slide in the T-slot 401 relatively;

As shown in Figure 4 and Figure 5, end pawl 5 back sides be provided with first slide block 2 on the square groove 501 that is complementary of square slider 201; Drive end bearing bracket 7 is the porose disc in center, uniform six T-slots 701 radially of one end, insert an end pawl 5 in each T-slot 701, drive end bearing bracket 7 other ends are with respect to uniform three grooves 702 that are complementary with floating lever rod 1 of centre bore, the through hole 703 that communicates with T-slot 701 is offered at two ends in the groove 702, and this through hole 703 square groove 501 at pawl 5 back sides, the corresponding end just in time;

As shown in Figure 6 and Figure 7, the floating lever rod 1 of transmission component is assemblied in the groove 702 of drive end bearing bracket 7, and floating lever rod 1 can be done radial motion in groove 702, square slider 201 on first slide block 2 just in time embeds in the square groove 501 at end pawl 5 back sides, simultaneously in the straight trough that is partially submerged into rear end cap 8 801 of second slide block 3 away from oblique T shape boss 301, circle voussoir 4 is assemblied in rear end cap 8 endoporus, and can axially be free to slide with respect to endoporus.

Its groundwork principle is as follows: drive circle voussoir 4 by telescopic hydraulic cylinder (not drawing among the figure) and make its axially reciprocating relatively in rear end cap 8 endoporus, by with the oblique T shape boss 301 of second slide block 3 on the inclined-plane engagement drive the radially descriscent heart motion that second slide block 3 is made relative rear end cap 8, second slide block 3 is hinged with floating lever rod 1, pass motion to floating lever rod 1, drive its radial motion; Floating lever rod 1 also is hinged with two ends first slide block 2, by being meshing with each other of first slide block 2 and end pawl 5, give two end pawls 5 with the radial motion mean allocation, so just realized transforming to the motion mode of six end pawls, 5 radial motions, realized the six pawls centering process of floating in twos from 4 axially-movables of circle voussoir.

According to the technology principle, determine that by tangent method the home position of known dimensions circle only needs two point of contacts, the centering and the clamping of workpiece can be realized in three point of contacts, this also is a scroll chuck centering principle.For the six-claw double-linkage centering chuck, adjacent two end pawls 5 are hinged by the floating lever rod 1 and second slide block 3, kept one and relatively rotated the free degree.Like this, drive in the synchronous radial motion process by circle voussoir 4 at three second slide blocks 3, six claws 5 are thereupon radial motion the time, the a pair of adjacent claw 5 that is driven by same floating lever rod 1 can also relatively rotate around second slide block, 3 bearing pin positions, technology principle and standard have been deferred to by the system that so both guaranteed, have realized that again six pawls contact centering and clamping simultaneously.

Claims

1. a six-claw double-linkage self-centering chuck is characterized in that: comprise forward flange, drive end bearing bracket, end pawl, transmission component, circle voussoir, rear end cap, rear flange;

Forward and backward end cap is located the back mutually and is connected and fixed by screw, and forward and backward flange cooperates the back, location fixedly connected by screw respectively with forward and backward end cap, and rear end cap one end face is evenly offered three radially straight troughs;

Transmission component is made up of first slide block, floating lever rod and second slide block, one end of first slide block is a straight pin, the other end is a square slider, second slide block is a cuboid, an end wherein is oblique T shape boss, hinged first slide block of floating lever rod two ends symmetry, the centre position is provided with straight pin and is hinged on floating lever rod upper surface centre position on second slide block;

The circle voussoir is the cylinder that the center has circular hole, along the face of cylinder evenly offer three with second slide block on the axial oblique T-slot that mates of oblique T shape boss;

The oblique T shape boss of transmission component by the second slide block end matches with oblique T-slot on the circle voussoir face of cylinder, and can slide relatively therein;

The square groove that square slider on the setting of the pawl back side, the end and first slide block is complementary;

Drive end bearing bracket is the porose disc in center, uniform six T-slots radially of one end, insert an end pawl in each T-slot, the drive end bearing bracket other end is with respect to uniform three grooves that are complementary with floating lever rod of centre bore, the through hole that communicates with T-slot is offered at two ends in the groove, and this through hole square groove at the pawl back side, the corresponding end just in time;

The floating lever rod of transmission component is assemblied in the groove of drive end bearing bracket, square slider on first slide block just in time embeds in the square groove at the pawl back side, the end, simultaneously in the straight trough that is partially submerged into rear end cap of second slide block away from oblique T shape boss, the circle voussoir is assemblied in the rear end cap endoporus, and can axially be free to slide with respect to endoporus.