CN113103163B

CN113103163B - Floating positioning device

Info

Publication number: CN113103163B
Application number: CN202110421611.3A
Authority: CN
Inventors: 闵信来; 张学华
Original assignee: WUXI BEST PRECISION MACHINERY CO Ltd
Current assignee: WUXI BEST PRECISION MACHINERY CO Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-05-03
Anticipated expiration: 2041-04-20
Also published as: CN113103163A

Abstract

The invention provides a floating positioning device, which comprises a base, cover plates and positioning pieces, wherein the positioning pieces are arranged on the base in a slip-proof manner, and the cover plates are symmetrically arranged on the base in front and back directions, so that a floating gap is formed between the positioning pieces and the two cover plates and the positioning pieces cannot be separated from the base; the bottom of the positioning piece is provided with an anti-falling sliding accessory, and the base is provided with a sliding accessory part matched with the sliding accessory; the floating gap exists between the slide fitting and the two cover plates. When this application can guarantee axial positioning, have certain extent's float volume between two setpoint, utilize the guidance quality of setting element, make it follow work piece axial positioning hole position change and change, realize the purpose of floating the location, guarantee that anchor clamps can fix a position smoothly.

Description

Floating positioning device

Technical Field

The invention relates to the technical field of clamps, in particular to a floating positioning device.

Background

The locating hole position degree of change scope of present wheel hub class work piece or other large-scale work pieces is big, adopt the location mode of a two-sided round pin location among the traditional location mode, can be because the error of locating hole is big and be difficult to the location, if the position degree of the tight control locating hole of process because of the location problem is revised, just improved the processing degree of difficulty, increase cost, and the locating hole is unqualified also causes the machining error increase because the location is inaccurate easily, the problem that the product disability rate is high, still seriously influence production efficiency, so need a unsteady positioner to solve the big location difficulty that causes of locating hole position degree of change scope, be difficult to the problem of processing.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the floating positioning device, which realizes the positioning of the self-adaptive positioning hole, does not influence the positioning precision and enlarges the positioning range. The technical scheme adopted by the invention is as follows:

a floating positioning device comprises a base, a cover plate and a positioning piece, wherein the positioning piece is arranged on the base in a slip-proof mode, the cover plate is symmetrically arranged on the base in a front-back mode, so that a floating gap exists between the positioning piece and the two cover plates, and the positioning piece cannot be separated from the base.

Furthermore, the bottom of the positioning piece is provided with an anti-falling sliding accessory, and the base is provided with a sliding accessory part matched with the sliding accessory; the floating gap exists between the slide fitting and the two cover plates.

Furthermore, the bottom of the sliding fitting is provided with a limiting groove and a sliding groove which are communicated, the sliding groove is arranged at the bottom of the limiting groove, the lower end of the sliding groove is open, and the left width and the right width of the limiting groove are greater than those of the sliding groove.

Furthermore, the top of the sliding fit part is provided with a limiting block and a sliding block which are connected, the limiting block is arranged at the top of the sliding block, and the left width and the right width of the limiting block are larger than those of the sliding block.

Furthermore, extension plates extend upwards from the left end and the right end of the base, a sliding fit space is formed between the two extension plates and the two cover plates, the two cover plates are arranged on the front end surface and the rear end surface of the extension plates, and the tops of the cover plates are flush with the tops of the extension plates;

the sliding fitting part and the sliding fitting part are arranged in the sliding fitting space.

Furthermore, the sliding fit part is a sliding seat which is detachably arranged in the sliding fit space.

Furthermore, the front side and the rear side of the bottom of the sliding seat are connected with the base through bolts; and the central position of the bottom of the sliding seat and the position, corresponding to the sliding seat, of the base are respectively provided with a positioning pin hole, and a positioning pin is inserted into the positioning pin hole.

Furthermore, the middle part of the positioning piece is provided with a covering part which is attached to the extension plate and the cover plate, and the covering part can cover the sliding fit space.

Furthermore, the sliding accessory further comprises a ball head elastic plunger, wherein the ball head elastic plunger penetrates through the cover plate, and one end of the ball head elastic plunger is in contact with the surface of the sliding accessory.

Further, step faces are symmetrically arranged in the front and back of the base, the bottom of the cover plate is attached to the step faces, threaded holes are symmetrically arranged in the left and right of the step faces, and a positioning hole is formed in the middle of the step face.

The invention has the advantages that:

the positioning piece is matched with the reference positioning pin in a sliding manner on the base, so that floating positioning between the two positioning points is realized, the position degree of the positioning hole of the workpiece is allowed to change within a certain range, the positioning difficulty is reduced, and the positioning precision is not influenced, so that the processing difficulty of the positioning hole of the workpiece is reduced, the requirements on processing equipment and a processing method of the positioning hole of the workpiece are also reduced, and the error waste caused by unqualified processing position degree of the positioning hole of the workpiece is also avoided;

the base, the cover plate, the ball head elastic plunger, the positioning piece and the sliding seat form an integral modular design, so that the replacement and adjustment are convenient, and the application range is wider;

the covering part is arranged on the positioning part, so that the dustproof function is realized, the floating is safer and more flexible, and the service life is prolonged.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a schematic structural diagram of a positioning element according to the present invention.

Fig. 3 is a structural view of the slider of the present invention.

Fig. 4 is a structural view of the base of the present invention.

Fig. 5 is a front view of the present invention.

Fig. 6 is a cross-sectional view taken along line a-a of fig. 5.

Fig. 7 is a cross-sectional view taken along line C-C of fig. 5.

Fig. 8 is a top view of the present invention.

Fig. 9 is a cross-sectional view taken along line B-B of fig. 8.

In the figure: the sliding block comprises a base 1, a cover plate 2, a ball head elastic plunger 3, a positioning piece 4, a sliding seat 5, an extension plate 101, a sliding matching space 102, a step surface 103, a sliding fitting 401, a limiting groove 401a, a sliding groove 401b, a covering part 402, a transition surface 402a, a limiting block 5a, a sliding block 5b and a top surface 5 c.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-9, the present invention provides a floating positioning device, which includes a base 1, a cover plate 2, a ball plunger 3 and a positioning member 4; the positioning piece 4 is arranged on the base 1 in a slip-proof manner, and the cover plates 2 are symmetrically arranged on the base 1 in a front-back manner, so that a floating gap exists between the positioning piece 4 and the two cover plates 2 and the positioning piece cannot be separated from the base 1.

Referring to fig. 2-4, the bottom of the positioning member 4 is provided with an anti-slip fitting 401, and the base 1 is provided with a slip fitting part adapted to the slip fitting 401; the floating gap exists between the sliding fitting part 401 and the two cover plates 2, and when the sliding fitting part 401 slides on the sliding fitting part, the front and back stroke is limited by the two cover plates 2, so that the floating positioning of the positioning piece 4 in a certain range is realized.

The bottom of the sliding part 401 is provided with a limiting groove 401a and a sliding groove 401b which are communicated, the sliding groove 401b is arranged at the bottom of the limiting groove 401a, the lower end of the sliding groove 401b is opened, and the left-right width of the limiting groove 401a is larger than the left-right width of the sliding groove 401 b;

the top of the sliding matching part is provided with a limiting block 5a and a sliding block 5b which are connected, the limiting block 5a is arranged at the top of the sliding block 5b, and the left-right width of the limiting block 5a is larger than that of the sliding block 5 b; specifically, when the sliding fitting part 401 and the sliding fitting part are assembled with each other, the sliding block 5b is located in the sliding groove 401b, the limiting block 5a is located in the limiting groove 401a, and the positioning element 4 cannot be drawn out from the top end of the sliding fitting part under the limitation of the front cover plate 2 and the rear cover plate 2, so that the anti-falling function is achieved;

as an embodiment of the present application, the sliding part may be a trapezoid structure with a wide top and a narrow bottom, and the bottom of the sliding part 401 is provided with a groove with the same shape as the sliding part, so that the positioning member 4 cannot be separated from the sliding part.

Extension plates 101 extend upwards from the left end and the right end of the base 1, a sliding fit space 102 is formed between the two extension plates 101 and the two cover plates 2, the two cover plates 2 are arranged on the front end surface and the rear end surface of the extension plates 101, and the tops of the cover plates 2 are flush with the tops of the extension plates 101;

the sliding fitting part 401 and the sliding fitting part are both arranged in the sliding fitting space 102; specifically, the extension plate 101 may be integrally formed with the base 1, or may be mounted on the base 1 by using a conventional fixing method such as bolts, and the like, for limiting the displacement of the positioning member 4 in the left-right direction and limiting the rotation of the positioning member 4.

As an embodiment of the present application, the sliding fit portion is a sliding seat 5, and the sliding seat 5 is detachably installed in the sliding fit space 102;

the top surface 5c of the sliding seat 5 is attached to the bottom surface of the sliding fitting 401, the side surface of the sliding fitting 401 is attached to the side surface of the extension plate 101, when the positioning piece 4 floats, the side surface of the sliding fitting 401 slides along the extension plate 101, and meanwhile, the sliding fitting 401 slides along the top surface 5c of the sliding seat 5, so that the moving straightness is improved;

referring to fig. 5-6, the connection relationship between the slide 5 and the base 1 is: the front side and the rear side of the bottom of the sliding seat 5 are connected with the base 1 through bolts; a positioning pin hole is respectively formed in the central position of the bottom of the sliding seat 5 and the position, corresponding to the sliding seat 5, on the base 1, and a positioning pin is inserted into the positioning pin hole; the positioning precision of the sliding seat 5 is improved by adopting a double connection mode of a positioning pin and a bolt; moreover, the slide seat 5 is matched with the slide fitting 401 in shape, so that the slide seat and the slide fitting can be processed and peeled from the same structure, the production of the two parts is easier, and the cost is reduced;

as another embodiment of the present application, the slider 5 and the base 1 are integrally formed.

Referring to fig. 1-4, a covering portion 402 attached to the extension plate 101 and the cover plate 2 is disposed in the middle of the positioning member 4, and the covering portion 402 can cover the slide-matching space 102, specifically, the covering portion 402 covers the slide-matching space 102 to form a closed space for preventing dust and impurities from entering the slide-matching space 102, so as to improve accuracy of adaptive positioning, reduce component jamming caused by impurities entering, reduce loss, and improve service life;

in one embodiment of the present application, a positioning portion 403 is provided on the top of the retainer 4 for fitting to a work positioning hole, and the positioning portion 403 and the covering portion 402 are transitioned by an umbrella-shaped transition surface 402a, thereby improving the smoothness of the surface of the retainer 4.

Referring to fig. 7, the ball plunger 3 is disposed in the cover plate 2, and one end of the ball plunger 3 contacts with the surface of the sliding part 401; when the positioning piece 4 floats on the base 1, the sliding piece 401 on the positioning piece 4 extrudes the ball head elastic plunger 3, so that the ball head elastic plunger 3 deforms, the original position of the sliding piece 401 is convenient to recover, and the purpose of automatic reset is achieved;

specifically, the ball head elastic plungers 3 are arranged on the cover plate 2 in pairs and are installed in a threaded manner, so that the paired configuration is more stable in elasticity, and the threaded connection is convenient to replace;

as an embodiment of the present application, the ball plunger 3 may be replaced by a spring, and the spring is disposed between the cover plate 2 and the sliding member 401, and the elastic force of the spring also facilitates the automatic return of the positioning member 4 during the floating process of the positioning member 4.

Referring to fig. 4 and 7, step surfaces 103 are symmetrically arranged on the front and the back of the base 1, the bottom of the cover plate 2 is attached to the step surfaces 103, threaded holes are symmetrically arranged on the step surfaces 103 in the left and right directions, and a positioning hole is arranged in the middle of the step surface 103; the design of step face 103 makes things convenient for the location of apron 2 to establish screw hole and locating hole on step face 103, conveniently install whole positioner in required position.

The working principle is as follows:

firstly, fixing a sliding seat 5 in a sliding fit space 102 of a base 1, then sliding a sliding part 401 on a positioning piece 4 into the sliding seat 5, installing a cover plate 2 on the front and back direction of the base 1 and screwing in a ball head elastic plunger 3 to complete the assembly of the whole floating positioning device; when individual parts are worn, the parts can be conveniently disassembled to be partially replaced;

when the device is used, after the reference is positioned by using the reference positioning pin, the device is installed at a required position, the floating track of the positioning piece 4 on the device is on the connecting line between the reference positioning pin and the positioning piece 4, when a workpiece is machined, if the positioning piece 4 on the device has deviation with the center of the workpiece positioning hole matched with the positioning piece 4, the positioning piece 4 is moved along the floating positioning direction, two degrees of freedom for limiting the positioning of the workpiece by the reference positioning pin are achieved, the device limits the rotation degree of freedom of the device and ensures the circumferential positioning of the workpiece, a certain range of floating amount exists between the positioning piece 4 and the reference positioning pin in the device, and the positioning piece 4 is guided by the top part to change along with the position of the workpiece positioning hole.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A floating positioning device comprises a base (1), a cover plate (2) and a positioning piece (4), and is characterized in that: the positioning piece (4) is arranged on the base (1) in a slip-proof way, and the cover plates (2) are symmetrically arranged on the base (1) in front and back directions, so that a floating gap exists between the positioning piece (4) and the two cover plates (2) and the positioning piece cannot be separated from the base (1);

the bottom of the positioning piece (4) is provided with an anti-falling sliding accessory (401), and the base (1) is provided with a sliding accessory part matched with the sliding accessory (401); the floating gap exists between the sliding fitting part (401) and the two cover plates (2);

extension plates (101) extend upwards from the left end and the right end of the base (1), a sliding fit space (102) is formed between the two extension plates (101) and the two cover plates (2), the two cover plates (2) are arranged on the front end surface and the rear end surface of the extension plates (101), and the tops of the cover plates (2) are flush with the tops of the extension plates (101);

the sliding fitting part (401) and the sliding fitting part are arranged in the sliding fitting space (102);

and a covering part (402) attached to the extension plate (101) and the cover plate (2) is arranged in the middle of the positioning part (4), and the covering part (402) can cover the sliding distribution space (102).

2. The floating positioning device of claim 1, wherein: the bottom of the sliding part (401) is provided with a limiting groove (401 a) and a sliding groove (401 b) which are communicated, the sliding groove (401 b) is arranged at the bottom of the limiting groove (401 a), the lower end of the sliding groove (401 b) is opened, and the left width and the right width of the limiting groove (401 a) are larger than those of the sliding groove (401 b).

3. The floating positioning device of claim 1, wherein: the top of sliding fit portion is equipped with consecutive stopper (5 a) and slider (5 b), slider (5 b) top is located in stopper (5 a) to the left and right sides width of stopper (5 a) is greater than the left and right sides width of slider (5 b).

4. A floating positioning device as defined in claim 2 or 3, wherein: the sliding fit part is a sliding seat (5), and the sliding seat (5) is detachably arranged in the sliding fit space (102).

5. The floating positioning device of claim 4, wherein: the front side and the rear side of the bottom of the sliding seat (5) are connected with the base (1) through bolts; and a positioning pin hole is respectively formed in the center position of the bottom of the sliding seat (5) and the position, corresponding to the sliding seat (5), on the base (1), and a positioning pin is inserted into the positioning pin hole.

6. The floating positioning device of any of claims 1-3, wherein: the ball head elastic plunger (3) penetrates through the cover plate (2), and one end of the ball head elastic plunger (3) is in surface contact with the sliding part (401).

7. The floating positioning device of any of claims 1-3, wherein: step face (103) are established to base (1) front and back symmetry, apron (2) bottom and step face (103) laminating, the bilateral symmetry is established the screw hole on step face (103), and sets for the position hole in the middle on step face (103).