CN202088002U

CN202088002U - Double-V-shaped automatic centering and locating mechanism for thin-plate type workpiece

Info

Publication number: CN202088002U
Application number: CN201120183036XU
Authority: CN
Inventors: 王勇; 李沛潭; 沈永贵
Original assignee: ANHUI HENGSHENG MACHINERY MANUFACTURING Co Ltd
Current assignee: ANHUI HENGSHENG MACHINERY MANUFACTURING Co Ltd
Priority date: 2011-06-01
Filing date: 2011-06-01
Publication date: 2011-12-28
Anticipated expiration: 2021-06-01

Abstract

The utility model discloses a double-V-shaped automatic centering and locating mechanism for a thin-plate type workpiece, which comprises a fixture base, locating clamping blocks, a bidirectional screw rod, limit blocks, support plates, a left-hand threaded nut and a right-hand threaded nut, wherein a pair of limit blocks is respectively and fixedly arranged at the two ends of the fixture base; each pair of limit blocks forms an inner guide groove with a rectangular cross section; the inner guide groove is internally provided with the left-hand threaded nut and the right-hand threaded nut taking the same shapes of the cross sections; the left-hand threaded nut and the right-hand threaded nut are respectively screwed to the two sides of the bidirectional screw rod; the two ends of the bidirectional screw rod are fixedly arranged so as to be supported by the two support plates on a fixture body; a left locating clamping block and a right locating clamping block are respectively and fixedly arranged on the left nut and the right nut; a plurality of support rods with equal heights are uniformly distributed on the fixture base; and the upper end faces of the support rods are in the same plane. The double-V-shaped automatic centering and locating mechanism of the utility model solves the problems that the actual effective height to the large excircle of the workpiece is small and the difficulty in radial location is caused to the taper with a small taper angle, therefore, the double-V-shaped automatic centering and locating mechanism has a reasonable structure and simple design and is safe and reliable in positioning.

Description

A kind of double V-shaped self-centering detent mechanism that is used for thin disc type work

Technical field

The utility model relates to the clamp technology field, specifically belongs to a kind of double V-shaped self-centering detent mechanism that is used for thin disc type work.

Background technology

For the processed position of end cap class workpiece in this drilling operating be rear end face up, front end face is the horizontal location surface down; The big cylindrical of workpiece blank is the centering surface; The locating surface that arc groove rotates for the restriction horizontal plane, workpiece contour structures characteristics have difficulties to the realization of this workpiece location, and existing positioning fixture all can not be accurately and reliably to its location.

The utility model content

The purpose of this utility model provides a kind of double V-shaped self-centering detent mechanism that is used for thin disc type work, solved the problem of and radial location difficulty that for small-angle circular cone cause little to the actual effective depth of the big cylindrical of workpiece, simplicity of design, rational in infrastructure, locate reliable and secure.

The technical solution adopted in the utility model is as follows:

A kind of double V-shaped self-centering detent mechanism that is used for thin disc type work, comprise clamp base, the location clamp, reverse-flighted screw, limited block, the center clamp, gripper shoe, left-handed nut and right-handed nut, two ends are fixed with a pair of limited block respectively on the described clamp base, every pair of limited block constitutes the interior gathering sill of a rectangular cross section, be provided with the left and right sides spin nut of same cross-sectional profile in the groove, left and right sides spin nut screws the both sides to reverse-flighted screw respectively, the reverse-flighted screw two ends by install with clamp body on two gripper shoes realize dual-gripper, reverse-flighted screw middle part two shaft shoulders and center clamp two lateral surfaces form twin shaft to spacing plane bearing, realize that reverse-flighted screw can only the original place rotation and can not axial displacement, thereby when being implemented in reverse-flighted screw and turning clockwise, about two nuts simultaneously equivalent to this median plane displacement, equivalent is removed when being rotated counterclockwise, on the nut of the left and right sides, be fixed with the left compact heap in location respectively, right location compact heap, their basic configuration is short V-type setting element, the function of double clamping element, focus with the symmetrical centre of reverse-flighted screw axis and centralized positioning clamp lateral surface on the clamp base is the center, a plurality of contour support bars evenly distribute, the upper surface of support bar is horizontal plane altogether, and the horizontal location that forms the disc type work end face supports.Left and right location compact heap following left nut is along reverse-flighted screw during with the displacement of centre of location clamp symmetrical centre face equivalent, after the plain line of the big cylindrical of thin disc type work contacts, force the left-right symmetry median plane of the big cylindrical of workpiece and the left-right symmetry median plane of centre of location clamp to coincide, the front and back symmetrical centre of workpiece overlaps with double V-shaped front and back symmetrical centre face, promptly realize the self-centering location of above-mentioned both direction, on above-mentioned horizontal plane locating surface, take place during this location.

Described location clamp working face is the V font, the self-centering function of double V-shaped location is the driving of the spacing realization down of moving axially of reverse-flighted screw being located V-block by bidirectional helical pair and centralized positioning clamp, the secondary accurate translation that realizes the location V-block along the secondary guide direction of slippage of two planar slips that constitutes by limited block and nut has prevented that the V-type locating piece from the inside upset of vertical taking place in moving process simultaneously.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The utility model adopts the axial location location of reverse-flighted screw, U type groove by center clamp middle part holds the diameter of axle at screw rod middle part, the two sides of " center clamp " have formed two constraints of matched in clearance to two shaft shoulder sides, screw rod middle part, have realized the original place rotation of screw shaft.Simultaneously, constitute the planar slide collateral by two limited blocks respectively at left and right spin nut and demonstrate,proved the levels of precision that nut moves along the screw axis direction toward complex line, make that tangible pivot offset does not take place the V-type setting element on the nut, positioning stablity in the horizontal plane.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is limited block of the present utility model and nut installation diagram structural representation.

The specific embodiment

Referring to accompanying drawing, a kind of double V-shaped self-centering detent mechanism that is used for thin disc type work of self-centering, comprise clamp base 1, location clamp 2, reverse-flighted screw 3, limited block 4, gripper shoe 5, clamp base 1 is evenly distributed with a plurality of support bars 8, a left side, right location clamp 2 is respectively by being bolted to a left side, on the right nut 6 on the plane and contour, a left side, right nut 6 screws the left and right sides at reverse-flighted screw 3 respectively, a left side, the right nut 6 rectangle parallel plane by self both sides and the two pairs of limited blocks 4 has respectively constituted the slippage pair that can only move to reciprocal orientation along X, the diameter of axle at reverse-flighted screw 3 two ends obtains the two point horizontal support by two gripper shoes 5 that are equivalent to sliding bearing, and each gripper shoe 5 is fixed on clamp base 1 left and right side by individual screw attachment; The location of reverse-flighted screw 3 axial locations, center clamp 7 is located in the middle of the reverse-flighted screw 3, U type groove by center clamp 7 middle parts holds the diameter of axle at reverse-flighted screw 3 middle parts, the two sides of center clamp 7 have formed two axial constraints of matched in clearance to two shaft shoulder sides, reverse-flighted screw 3 middle parts, and equivalence has realized the rotation of reverse-flighted screw 3 original places for the spacing plane bearing of bi-directional axial.

Claims

1. one kind is used for approaching the double V-shaped self-centering detent mechanism of disc type work, comprise clamp base, the location clamp, reverse-flighted screw, limited block, gripper shoe, left-handed nut and right-handed nut, it is characterized in that: two ends are fixed with a pair of limited block respectively on the described clamp base, every pair of limited block constitutes the interior gathering sill of a rectangular cross section, be provided with the left and right sides spin nut of same cross-sectional profile in the groove, left and right sides spin nut screws the both sides to reverse-flighted screw respectively, the reverse-flighted screw two ends by install with clamp body on two gripper shoes support, on the nut of the left and right sides, be fixed with the left compact heap in location respectively, right location compact heap, focus with the symmetrical centre of reverse-flighted screw axis and centralized positioning clamp lateral surface on the clamp base is the center, even a plurality of contour support bars that distribute, the upper surface of support bar is horizontal plane altogether.

2. according to the described a kind of double V-shaped self-centering detent mechanism that is used for thin disc type work of claim 1, it is characterized in that: described location clamp working face is the V font.

3. according to the described a kind of double V-shaped self-centering detent mechanism that is used for thin disc type work of claim 1, it is characterized in that: described reverse-flighted screw middle part two shaft shoulders are provided with the center clamp.