CN212420471U

CN212420471U - Symmetrical clamping base

Info

Publication number: CN212420471U
Application number: CN202020872556.0U
Authority: CN
Inventors: 李瑛�; 李琛; 王向进; 盛定仪; 李哲; 李东; 江恒
Original assignee: Army Engineering University of PLA
Current assignee: Army Engineering University of PLA
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-01-29
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a symmetry clamping base, comprising a base plate, first supporting seat, second supporting seat and third supporting seat have set gradually on the bottom plate, the bearing frame setting is passed through on the second supporting seat at the lead screw middle part, the lead screw both ends are equallyd divide and do not set up on first supporting seat and third supporting seat through the bearing frame, the part that the lead screw is located between first supporting seat and the second supporting seat is positive spiral line pole, the part that the lead screw is located between second supporting seat and the third supporting seat is anti-spiral line pole, positive spiral line pole passes the screw hole on the first slider, anti-spiral line pole passes the screw hole on the second slider, the utility model discloses when carrying out the centre gripping of symmetrical work piece, need not the central location of symmetrical work piece, can aim at the center of symmetrical work piece automatically.

Description

Symmetrical clamping base

Technical Field

The utility model belongs to the technical field of frock location clamping device, concretely relates to symmetry clamping base.

Background

In the existing mechanical manufacturing industry, in the process of riveting or machining a workpiece, the workpiece needs to be positioned and clamped, and a part of the workpiece only needs to be positioned and clamped by taking one end face of the workpiece as a reference, so that the positioning requirement is well solved, some workpieces need to be positioned by taking the symmetric center of the workpiece as a reference, for example, for the clamping of a cylindrical bar, a lathe chuck is a commonly used clamping device, the symmetric central axis of the workpiece is always at a fixed position no matter the diameter of the clamped cylindrical workpiece, but for the clamping of other non-cylindrical workpieces, when the symmetric center of the workpiece is taken as the positioning reference, no accurate positioning mode or modularized positioning device is available in the practical production for completing the clamping, the workpiece end face is often adopted for positioning, and in addition, the workpiece symmetric center of the workpiece is indirectly positioned by improving the workpiece precision of the workpiece, the positioning and clamping of the symmetric center indirectly completed by the end face positioning mode inevitably generates certain errors under the influence of the size errors of the workpiece, namely, the workpiece is positioned by the end face, and after the workpieces with different length sizes are clamped, the positions of the symmetric centers are different, so that the uniformity and stability of the symmetric centers of the clamped workpieces cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art have above-mentioned problem, provide a symmetry clamping base.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a symmetrical clamping base comprises a bottom plate, wherein a first supporting seat, a second supporting seat and a third supporting seat are sequentially arranged on the bottom plate, the middle part of a screw rod is arranged on the second supporting seat through a bearing seat, two ends of the screw rod are respectively arranged on the first supporting seat and the third supporting seat through the bearing seats, the part of the screw rod, which is positioned between the first supporting seat and the second supporting seat, is a positive spiral threaded rod, the part of the screw rod, which is positioned between the second supporting seat and the third supporting seat, is a negative spiral threaded rod, the positive spiral threaded rod penetrates through a threaded hole in a first sliding block, and a positive thread of the positive spiral threaded rod is matched with the threaded hole in the first sliding block; the reverse-spiral threaded rod penetrates through a threaded hole in the second sliding block, the reverse thread of the reverse-spiral threaded rod is matched with the threaded hole in the second sliding block, the sliding rod penetrates through the limiting hole in the first sliding block, the limiting hole in the second supporting seat and the limiting hole in the second sliding block in a movable mode in sequence, two ends of the sliding rod are fixed on the first supporting seat and the third supporting seat respectively, and the end portion of the lead screw is provided with a handle.

The pitch of the positive spiral thread on the positive spiral thread rod and the pitch of the negative spiral thread on the negative spiral thread rod are the same as described above.

The first sliding block and the second sliding block are both provided with positioning holes.

Compared with the prior art, the utility model, following beneficial effect has:

use the utility model discloses when carrying out the centre gripping of symmetry work piece, need not the center location of symmetry work piece, can find the center of symmetry work piece automatically.

Drawings

Fig. 1 is a schematic structural view of a screw rod.

FIG. 2 is a side view of a slider.

FIG. 3 is a schematic top view of a slider.

Fig. 4 is a schematic side view of the present invention.

Fig. 5 is a schematic top view of the present invention.

In the figure: 1-a screw rod; 101-positive thread; 102-reverse-rotation threads; 2-a first slide; 3-a bottom plate; 4-a first support; 5-a second supporting seat; 6-a third supporting seat; 7-a handle; 8-a slide bar; 9-a second slide block; 10-a threaded hole; 11-a limiting hole; 12-positioning holes.

Detailed Description

To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

A symmetrical clamping base comprises a bottom plate 3, wherein a first supporting seat 4, a second supporting seat 5 and a third supporting seat 6 are sequentially arranged on the bottom plate 3, the middle part of a screw rod 1 is arranged on the second supporting seat 5 through a bearing seat, two ends of the screw rod 1 are respectively arranged on the first supporting seat 4 and the third supporting seat 6 through the bearing seats, a part of the screw rod 1, which is positioned between the first supporting seat 4 and the second supporting seat 5, is a positive spiral thread rod 101, a part of the screw rod 1, which is positioned between the second supporting seat 5 and the third supporting seat 6, is a reverse spiral thread rod 102, the positive spiral thread rod 101 penetrates through a threaded hole 10 on a first sliding block 2, and the positive thread of the positive spiral thread rod 101 is matched with the threaded hole 10 on the first sliding block 2; the reverse spiral thread rod 102 penetrates through a threaded hole 10 in the second sliding block 9, the reverse thread of the reverse spiral thread rod 102 is matched with the threaded hole 10 in the second sliding block 9, the sliding rod 8 penetrates through a limiting hole 11 in the first sliding block 2, a limiting hole in the second supporting seat 5 and a limiting hole 11 in the second sliding block 9 in a movable mode in sequence, two ends of the sliding rod 8 are fixed on the first supporting seat 4 and the third supporting seat 6 respectively, the handle 7 is arranged at the end portion of the screw rod 1, and the thread pitch of the positive spiral thread on the positive spiral thread rod 101 is the same as that of the reverse spiral thread on the reverse spiral thread rod 102. The first slide block 2 and the second slide block 9 are both provided with positioning holes 12.

As shown in fig. 1, the left and right parts of the screw rod 1 are respectively a reverse-threaded rod 102 and a forward-threaded rod 101, and the reverse-threaded rod 102 and the forward-threaded rod 101 are symmetrically processed, that is, the thread pitch of the forward threads on the forward-threaded rod 101 is the same as that of the reverse threads on the reverse-threaded rod 102.

As shown in fig. 2 and 3, the first slider 2 and the second slider 9 are both provided with threaded holes 10 respectively adapted to the positive spiral thread of the positive spiral thread rod 101 and the negative spiral thread of the negative spiral thread rod 102, the first slider 2 and the positive spiral thread rod 101 form a structure of a screw rod and a nut, the second slider 9 and the negative spiral thread rod 102 also form a structure of a screw rod and a nut, and when the screw rod 1 is rotated, the first slider 2 and the second slider 9 move in opposite directions or move in opposite directions at the same time. The first sliding block 2 and the second sliding block 9 are distributed with the second supporting seat 5 as a symmetrical center, and the pitch of the positive spiral thread on the positive spiral thread rod 101 is the same as that of the negative spiral thread on the negative spiral thread rod 102, so that when the screw rod 1 is rotated by the handle 7, the first sliding block 2 and the second sliding block 9 move in the same direction or in the same distance in the opposite direction. Preferably, the tops of the first sliding block 2 and the second sliding block 9 are higher than the top of the second supporting seat 5, so as to clamp a solid symmetrical workpiece, and when the first sliding block 2 and the second sliding block 9 move towards each other at the same time, the first sliding block 2 and the second sliding block 9 clamp the symmetrical workpiece.

As shown in fig. 4 and 5, when the first slider 2 and the second slider 9 move toward or away from each other, the first slider 2 and the second slider 9 do not turn over under the guiding action of the sliding rod 8.

The utility model discloses when using, at first twist grip 7 drives lead screw 1 rotatory for lead screw 1 drives first slider 2 and the 9 back of the body motions of second slider, will treat the symmetrical work piece of centre gripping and place between first slider 2 and second slider 9, then reverse twist grip 7, it is rotatory to drive lead screw 1, makes lead screw 1 drive first slider 2 and the 9 opposite directions motions of second slider, first slider 2 and the 9 centre gripping symmetrical work pieces of second slider. After clamping, the threaded end of the positioning bolt is screwed into the positioning holes 12 of the first sliding block 2 and the second sliding block 9 and abuts against the bottom plate 3, and the first sliding block 2 and the second sliding block 9 are positioned.

When using the utility model discloses when carrying out central symmetry location to two symmetrical work pieces, can use two the utility model discloses a symmetrical clamping base is unanimous with the central adjustment of two symmetrical clamping bases, then uses two symmetrical clamping bases to carry out the centre gripping to two not unidimensional symmetrical work pieces respectively, and the centre gripping finishes the back, can realize two not unidimensional symmetrical work piece's the automatic alignment of finding in center.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A symmetrical clamping base comprises a bottom plate (3) and is characterized in that a first supporting seat (4), a second supporting seat (5) and a third supporting seat (6) are sequentially arranged on the bottom plate (3), the middle of a screw rod (1) is arranged on the second supporting seat (5) through a bearing seat, two ends of the screw rod (1) are respectively arranged on the first supporting seat (4) and the third supporting seat (6) through the bearing seats, the part of the screw rod (1) between the first supporting seat (4) and the second supporting seat (5) is a positive spiral threaded rod (101), the part of the screw rod (1) between the second supporting seat (5) and the third supporting seat (6) is a reverse spiral threaded rod (102), and the positive spiral threaded rod (101) penetrates through a threaded hole (10) in a first sliding block (2), the positive thread of the positive spiral thread rod (101) is matched with the threaded hole (10) on the first sliding block (2); the screw thread hole (10) on the second slider (9) is passed to anti-helix thread pole (102), and the screw thread hole (10) adaptation on the anti-helix thread pole (102) and the second slider (9), spacing hole (11) on the first slider (2), spacing hole on the second supporting seat (5) and spacing hole (11) on second slider (9) are run through in proper order in activity in slide bar (8), slide bar (8) both ends are fixed respectively on first supporting seat (4) and third supporting seat (6), the tip of lead screw (1) is provided with handle (7), the tooth pitch of the anti-helix thread on positive helix thread pole (101) and anti-helix thread pole (102) is the same.

2. The symmetrical clamping base according to claim 1, wherein the first sliding block (2) and the second sliding block (9) are provided with positioning holes (12).