CN210588270U

CN210588270U - Positioning fixture

Info

Publication number: CN210588270U
Application number: CN201921659010.0U
Authority: CN
Inventors: 杨世钧; 陈亮; 方猛; 魏杰; 汪伟
Original assignee: Wuhan Lianhang Electrical And Mechanical Co ltd
Current assignee: Wuhan Lianhang Electrical And Mechanical Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-22
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to the technical field of clamping and positioning of an outer star wheel, and discloses a positioning fixture, which comprises a first elastic part and a floating positioning disc, wherein the floating positioning disc is arranged on the first elastic part, and a chamfer positioning ring matched with a section type chamfer of the outer star wheel is arranged on the floating positioning disc; the spherical positioning piece is arranged on the floating positioning disc, and a spherical positioning ring matched with the nodal spherical surface of the outer star wheel is arranged on the spherical positioning piece; unsteady pushing down piece, second elastic component and driving piece, unsteady pushing down piece passes through the second elastic component with the driving piece and is connected, and unsteady pushing down piece can be supported and is pressed on the besides-star wheel. The driving piece drives the floating lower pressing piece to move downwards, and under the acting force of the first elastic piece and the second elastic piece, the floating lower pressing piece, the floating positioning disc and the spherical positioning piece are matched to clamp and position the outer star wheel. Because floating positioning disk, sphere setting element and unsteady pushing down the piece and can take place to float, can guarantee that the axis direction of besides-star wheel is unanimous with floating positioning disk axis direction, guarantees the machining precision.

Description

Positioning fixture

Technical Field

The utility model relates to an outer star gear presss from both sides tight location technical field, especially relates to a positioning fixture.

Background

With the development of economy and science and technology, the automobile industry is also rapidly developing, and the automobile needs to use the besides-star wheel in the power transmission process. The end face of the handle shaft needs to be scraped, milled and turned in the machining process of the outer star wheel, and the outer star wheel needs to be positioned. The two common positioning modes at present are combined by using a section type inner spherical surface for positioning and using a V-shaped block to symmetrically clamp a handle part. While concentricity of the apex hole and the arbor can be controlled, concentricity of the apex hole and the nodal inner spherical surface positioning cannot be controlled. The other type is main positioning and auxiliary positioning of the sectional type spherical surface, namely the sectional type chamfer angle is used as a limit position to be placed in place and then is horizontally clamped by the expansion clamping jaw, so that the effect of positioning by the spherical surface is achieved, but the concentricity of the center hole and the sectional type spherical surface is not easy to guarantee.

Therefore, a positioning fixture is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a positioning fixture, its simple structure, the location is accurate, can guarantee follow-up machining precision.

To achieve the purpose, the utility model adopts the following technical proposal:

there is provided a positioning jig including:

a first elastic member;

the floating positioning disc is arranged on the first elastic piece, and a chamfer positioning ring matched with the section chamfer of the outer star wheel is arranged on the floating positioning disc;

the spherical positioning piece is arranged on the floating positioning disc, and a spherical positioning ring matched with the nodal spherical surface of the besides-star wheel is arranged on the spherical positioning piece;

unsteady pushing down piece, second elastic component and driving piece, unsteady pushing down the piece with the driving piece passes through the second elastic component and is connected, unsteady pushing down the piece can support and press on the external star wheel.

Preferably, the floating positioning device further comprises a base, wherein a positioning column is arranged on the base, the positioning column is sleeved with the first elastic piece, the positioning column is sleeved with the floating positioning disc, two ends of the first elastic piece respectively abut against the floating positioning disc and the base, and the floating positioning disc can float relative to the base.

Preferably, the top of reference column is provided with the locating pin, the one end of locating pin expose in the lateral wall of sphere setting element, the end that exposes of locating pin with the arc wall phase-match in the outer star gear.

Preferably, still include the mounting panel of "L" type, the base set up in on the flat board of mounting panel, the driving piece set up in on the riser of mounting panel.

Preferably, the sliding seat is connected to the output end of the driving element, and the second elastic element is arranged on the sliding seat.

Preferably, the vertical plate is provided with a slide rail, and the sliding seat is provided with a slide block matched with the slide rail.

Preferably, two symmetrically arranged lower pressing blocks are arranged on the floating lower pressing piece.

Preferably, the sliding seat and the floating lower pressing piece are both provided with avoidance grooves.

Preferably, the number of the second elastic members is two, and the two second elastic members are symmetrically arranged.

Preferably, the first elastic member and the second elastic member are both polyurethane elastic rings.

The utility model has the advantages that: the outer star wheel is buckled on the spherical positioning piece and the floating positioning disc, the driving piece drives the floating lower pressing piece to move downwards, the floating lower pressing piece is pressed on the outer star wheel, then the floating lower pressing piece is driven to move downwards, the first elastic piece and the second elastic piece can be subjected to elastic compression force, the section type chamfer of the outer star wheel can be pressed on the chamfer positioning ring, the section type spherical surface is pressed on the spherical positioning ring, and under the acting force of the first elastic piece and the second elastic piece, the floating lower pressing piece, the floating positioning disc and the spherical positioning piece are matched to realize clamping and positioning of the outer star wheel. Because the existence of first elastic component, floating positioning disk and sphere setting element can take place to float, because the existence of second elastic component, float and push down the piece and can take place to float. The floating positioning disc is matched with the spherical positioning piece to position the outer star wheel, and floating positioning disc, the spherical positioning piece and the floating pressing piece can float, so that the axis direction of the outer star wheel is consistent with the axis direction of the floating positioning disc, the machining precision of scraping, milling and turning is guaranteed, and the coaxial center of the center hole and the handle shaft and the coaxial center of the center hole and the nodal spherical surface are guaranteed. And the positioning clamp has a simple structure, and can be suitable for a scraping and milling machine and a lathe.

Drawings

Fig. 1 is a schematic structural diagram of a positioning fixture (including an outer star wheel) provided by the present invention;

fig. 2 is a schematic structural diagram of the positioning fixture provided by the present invention (excluding the first elastic member);

fig. 3 is a schematic structural view of the base, the first elastic member, the floating positioning plate, the spherical positioning member and the outer star wheel provided by the present invention;

fig. 4 is a schematic structural diagram of the base provided by the present invention.

In the figure: 10. an outer star wheel; 101. section chamfering; 102. a nodal spherical surface; 103. an arc-shaped slot;

1. a first elastic member;

2. a floating positioning plate; 21. chamfering the positioning ring;

3. a spherical positioning member; 31. a spherical positioning ring;

4. a floating lower press; 41. pressing the block;

5. a second elastic member;

6. a base; 61. a positioning column; 62. positioning pins;

7. mounting a plate; 71. a flat plate; 72. a vertical plate; 73. a slide rail;

8. a sliding seat; 81. avoiding the groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The end face of the handle shaft needs to be scraped, milled and turned in the machining process of the outer star wheel, and the outer star wheel needs to be positioned. The two common positioning modes at present are combined by using a section type inner spherical surface for positioning and using a V-shaped block to symmetrically clamp a handle part. While concentricity of the apex hole and the arbor can be controlled, concentricity of the apex hole and the nodal inner spherical surface positioning cannot be controlled. The other type is main positioning and auxiliary positioning of the sectional type spherical surface, namely the sectional type chamfer angle is used as a limit position to be placed in place and then is horizontally clamped by the expansion clamping jaw, so that the effect of positioning by the spherical surface is achieved, but the concentricity of the center hole and the sectional type spherical surface is not easy to guarantee.

As shown in fig. 1-4, the present embodiment discloses a positioning fixture, which includes a first elastic member 1, a floating positioning plate 2, a spherical positioning member 3, a floating lower member 4, a second elastic member 5, and a driving member.

The floating positioning disc 2 is arranged on the first elastic piece 1, and a chamfer positioning ring 21 matched with the section chamfer 101 of the outer star wheel 10 is arranged on the floating positioning disc 2. The spherical positioning piece 3 is arranged on the floating positioning disc 2, and the spherical positioning piece 3 is provided with a spherical positioning ring 31 matched with the nodal spherical surface 102 of the besides-star wheel 10. The floating lower press piece 4 is connected with the driving piece through a second elastic piece 5, and the floating lower press piece 4 can be pressed against the outer star wheel 10.

The outer star wheel 10 is buckled on the spherical positioning piece 3 and the floating positioning disc 2, the driving piece drives the floating lower pressing piece 4 to move downwards, the floating lower pressing piece 4 is pressed against the outer star wheel 10, then the floating lower pressing piece 4 is continuously driven to move downwards, the first elastic piece 1 and the second elastic piece 5 can be subjected to elastic compression force, the section type chamfer 101 of the outer star wheel 10 can be pressed against the chamfer positioning ring 21, the section type spherical surface 102 is pressed against the spherical positioning ring 31, and under the acting force of the first elastic piece 1 and the second elastic piece 5, the floating lower pressing piece 4, the floating positioning disc 2 and the spherical positioning piece 3 are matched to clamp and position the outer star wheel 10. Due to the first elastic member 1, the floating positioning plate 2 and the spherical positioning member 3 can float, and due to the second elastic member 5, the floating lower member 4 can float. The floating positioning disc 2 is matched with the spherical positioning piece 3 to position the outer star wheel 10, and the floating positioning disc 2, the spherical positioning piece 3 and the floating lower pressing piece 4 can float, so that the axis direction of the outer star wheel 10 is consistent with the axis direction of the floating positioning disc 2, the machining precision of scraping, milling and turning is guaranteed, and the tip hole and the handle shaft are coaxial and the tip hole and the nodal-type spherical surface 102 are coaxial. And the positioning clamp has a simple structure, and can be suitable for a scraping and milling machine and a lathe.

Optionally, this positioning fixture still includes base 6, is provided with reference column 61 on the base 6, and reference column 61 is located to first elastic component 1 cover, and reference column 61 is located to unsteady positioning disk 2 cover, and the both ends of first elastic component 1 are supported respectively and are pressed in unsteady positioning disk 2 and base 6, and the internal diameter of the through-hole on the unsteady positioning disk 2 is greater than the external diameter of reference column 61, can make unsteady positioning disk 2 rock for reference column 61, and unsteady positioning disk 2 can float for base 6 promptly. The top end of the positioning column 61 is provided with a positioning pin 62, one end of the positioning pin 62 is exposed out of the side wall of the spherical positioning piece 3, and the exposed end of the positioning pin 62 is matched with the arc-shaped groove 103 in the outer star wheel 10. After the besides-star wheel 10 is buckled on the spherical positioning piece 3, the exposed end of the positioning pin 62 is clamped in the arc-shaped groove 103 of the besides-star wheel 10, and the rotation of the besides-star wheel 10 can be avoided in the process of machining the center hole. Preferably, two positioning pins 62 are provided in the present embodiment, the two positioning pins 62 are integrally formed as a positioning rod, and both ends of the positioning rod are exposed ends. In other embodiments, one locating pin 62, three locating pins 62, or more locating pins 62 may be provided.

Optionally, the positioning fixture further comprises an "L" shaped mounting plate 7 and a sliding seat 8, the base 6 is disposed on a flat plate 71 of the mounting plate 7, and the driving member is disposed on a vertical plate 72 of the mounting plate 7. The sliding seat 8 is connected with a vertical plate 72 in a sliding manner, specifically, a sliding rail 73 is arranged on the vertical plate 72, and a sliding block matched with the sliding rail 73 is arranged on the sliding seat 8. The sliding seat 8 is connected to the output end of the driving member, one end of the second elastic member 5 is connected to the lower surface of the sliding seat 8, and the other end is connected to the floating lower pressing member 4. The sliding seat 8 and the floating lower pressing piece 4 are both provided with avoidance grooves 81, and the handle shafts of the outer star wheel 10 cannot interfere in the downward movement process of the floating lower pressing piece 4. Two lower pressing blocks 41 which are symmetrically arranged are arranged on the lower surface of the floating lower pressing piece 4, and the two lower pressing blocks 41 are respectively positioned on the left side and the right side of the avoidance groove 81. The number of the second elastic members 5 is two, the two second elastic members 5 are symmetrically arranged, and the two second elastic members 5 are located on two sides of the avoiding groove 81. First elastic component 1 and second elastic component 5 are polyurethane elastic ring, polyurethane elastic ring is before not damaging, elastic deformation can take place for elastic performance all the time to have, but after the spring was compressed the certain limit, just no longer have elasticity, elastic deformation can not take place, polyurethane elastic ring can guarantee the positioning disk 2 that floats, spherical surface positioning part 3 and float down 4 emergence are floated, the axis direction of guaranteeing besides-star wheel 10 is unanimous with the positioning disk 2 axis direction that floats, in order to guarantee to scrape the machining precision who mills and car processing, guarantee apex hole and handle axle and apex hole and nodal pattern sphere 102 axle center promptly.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A positioning jig, comprising:

a first elastic member (1);

the floating positioning disc (2) is arranged on the first elastic piece (1), and a chamfer positioning ring (21) matched with the section-type chamfer (101) of the outer star wheel (10) is arranged on the floating positioning disc (2);

the spherical positioning piece (3) is arranged on the floating positioning disc (2), and a spherical positioning ring (31) matched with the nodal spherical surface (102) of the outer star wheel (10) is arranged on the spherical positioning piece (3);

unsteady pushing down piece (4), second elastic component (5) and driving piece, unsteady pushing down piece (4) with the driving piece passes through second elastic component (5) and connects, unsteady pushing down piece (4) can support press in on outer star wheel (10).

2. The positioning fixture according to claim 1, further comprising a base (6), wherein a positioning column (61) is disposed on the base (6), the first elastic member (1) is sleeved on the positioning column (61), the floating positioning plate (2) is sleeved on the positioning column (61), two ends of the first elastic member (1) respectively abut against the floating positioning plate (2) and the base (6), and the floating positioning plate (2) can float relative to the base (6).

3. The positioning fixture according to claim 2, wherein a positioning pin (62) is disposed at a top end of the positioning column (61), one end of the positioning pin (62) is exposed out of a side wall of the spherical positioning part (3), and an exposed end of the positioning pin (62) is matched with an arc-shaped groove (103) in the outer star wheel (10).

4. The positioning clamp according to claim 2, further comprising an "L" -shaped mounting plate (7), wherein the base (6) is arranged on a flat plate (71) of the mounting plate (7), and wherein the driving member is arranged on a vertical plate (72) of the mounting plate (7).

5. The positioning clamp according to claim 4, further comprising a sliding seat (8), wherein the sliding seat (8) is slidably connected with the vertical plate (72), the sliding seat (8) is connected to the output end of the driving member, and the second elastic member (5) is disposed on the sliding seat (8).

6. The positioning clamp according to claim 5, characterized in that the vertical plate (72) is provided with a sliding rail (73), and the sliding seat (8) is provided with a sliding block matched with the sliding rail (73).

7. The positioning clamp according to claim 1, characterized in that two symmetrically arranged holding-down blocks (41) are arranged on the floating holding-down member (4).

8. Positioning clamp according to claim 5, characterized in that an avoiding groove (81) is provided on both the sliding seat (8) and the floating lower press (4).

9. The positioning clamp according to claim 1, characterized in that the number of said second elastic members (5) is two, two of said second elastic members (5) being symmetrically arranged.

10. Positioning fixture according to claim 1, characterized in that the first elastic element (1) and the second elastic element (5) are both polyurethane elastic rings.