CN218947419U

CN218947419U - Self-centering fixture for pull-down tensioning

Info

Publication number: CN218947419U
Application number: CN202222943797.1U
Authority: CN
Inventors: 朱小龙
Original assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Current assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-05-02
Anticipated expiration: 2032-11-04

Abstract

The utility model discloses a pull-down tensioning self-centering clamp, which comprises: the positioning device is used for supporting and positioning the part; the compressing device is arranged at one side of the positioning device and used for compressing the part; the tensioning device is arranged on the positioning device and used for tensioning an inner hole of the part; and the pull-down device is simultaneously connected with the tensioning device and the compressing device and is used for simultaneously driving the tensioning device and the compressing device to tension and compress the part. According to the clamping and tensioning device, the clamping and tensioning actions of the parts are completed simultaneously through one action of the pull-down device, and the clamping and tensioning device is accurate in positioning and more stable.

Description

Self-centering fixture for pull-down tensioning

Technical Field

The utility model relates to the technical field of part machining and positioning, in particular to a self-centering fixture for pull-down tensioning.

Background

In the processing of automobile parts, to the part that just has the centre bore of section of thick bamboo class, current anchor clamps are when fixing a position, and some are the simple clamp that fixes a position its terminal surface, and some are from the hole location that rises tightly, and two kinds of anchor clamps all cause the location unstable easily, also adopt above-mentioned two kinds of locate mode to fix a position simultaneously, and not only the structure is complicated, and need two drive arrangement to drive two actions simultaneously, just so increased the cost, and occupation space is great.

Disclosure of Invention

For solving prior art's not enough, this application provides drop-down tensioning self-centering anchor clamps, include:

the positioning device is used for supporting and positioning the part;

the compressing device is arranged at one side of the positioning device and used for compressing the part;

the tensioning device is arranged on the positioning device and used for tensioning an inner hole of the part;

and the pull-down device is simultaneously connected with the tensioning device and the compressing device and is used for simultaneously driving the tensioning device and the compressing device to tension and compress the part.

Further, the positioning device comprises a positioning plate, and a plurality of positioning columns and a plurality of positioning pins are arranged on the positioning plate.

Further, the compressing device comprises an adapter plate arranged below the positioning device, the adapter plate is provided with a plurality of mounting ends, each mounting end is provided with a compressing assembly, each compressing assembly comprises a compressing seat, a rotating plate, a connecting rod and a pressing plate, one end of each connecting rod is fixedly connected to the adapter plate, the other end of each connecting rod is in rotating connection with one end of each rotating plate, and the pressing plates are simultaneously in rotating connection with the other end of each rotating plate and the compressing seat.

Further, the pull-down device comprises a pull rod arranged through the positioning device, and the adapter plate is connected to the pull rod.

Further, the tensioning device comprises a taper sleeve, a tensioning sleeve and a pressing component, the taper sleeve is arranged on the positioning device, the tensioning sleeve is arranged on the outer side of the taper sleeve, and the pressing component is arranged at the end part of the pull rod.

Further, the pushing component comprises a sleeve, a limiting block and a spring, the limiting block is fixedly arranged at the end part of the pull rod, the sleeve is provided with a bottom wall and sleeved outside the limiting block and the pull rod, the spring is arranged between the bottom wall of the sleeve and the limiting block, and the bottom wall of the sleeve can be abutted with the end part of the tensioning sleeve.

Further, a limiting groove is formed in the pull rod, a limiting pin is arranged on the taper sleeve, and the limiting pin is movably arranged in the limiting groove.

Further, the pull-down tensioning self-centering clamp further comprises a protective cover, and the protective cover is arranged on the outer side of the pressing device.

Further, the positioning device is further provided with an airtight detection component for detecting whether the part is placed in place or not.

The beneficial point of the application lies in: the self-centering clamp for the pull-down tensioning is provided, and the clamping and tensioning actions of the part are completed simultaneously through one action of the pull-down device, so that the positioning is accurate and stable.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a pull-down tensioning self-centering clamp of the present application;

FIG. 2 is a schematic view of the positioning device in FIG. 1;

FIG. 3 is a schematic view of the compressing apparatus in FIG. 1;

FIG. 4 is a schematic view of the partial structure of FIG. 1;

FIG. 5 is a schematic view of the tensioning device of FIG. 4;

FIG. 6 is a schematic view of the taper sleeve of FIG. 5;

FIG. 7 is a schematic view of the pressing assembly shown in FIG. 6;

fig. 8 is a cross-sectional view A-A of fig. 7.

Marked in the figure as: 10. the device comprises a positioning device, 101, a positioning plate, 102, a positioning column, 103, a positioning pin, 104, an airtight detection hole, 11, a pressing device, 111, an adapter plate, 112, a mounting groove, 113, a pressing seat, 114, a rotating plate, 115, a connecting rod, 116, a pressing plate, 12, a tensioning device, 121, a taper sleeve, 1211, a base, 1212, a taper platform, 1213, a limiting hole, 122, a tensioning sleeve, 123, a pressing component, 1231, a sleeve, 1232, a limiting block, 1233, a spring, 13, a pull-down device, 131, a pull rod, 14, a protective cover, 15 and a bottom plate.

Detailed Description

The utility model will be described in further detail below with reference to the drawings and to specific examples.

Referring to fig. 1-8, the embodiment provides a self-centering fixture for pull-down tensioning, which comprises a positioning device 10, a compacting device 11, a tensioning device 12 and a pull-down device 13, wherein the positioning device 10 is used for supporting and positioning a part, and the compacting device 11 is arranged on one side of the positioning device and is used for compacting the part; the tensioning device 12 is arranged on the positioning device and used for tensioning an inner hole of the part; the pull-down device 13 is connected with the tensioning device and the compressing device at the same time and is used for driving the tensioning device and the compressing device to tension and compress the part at the same time.

Specifically, the positioning device 10 includes a positioning plate 101, the positioning plate 101 is provided with a central hole, a plurality of positioning columns 102 and a plurality of positioning pins 103 are arranged along the edge position of the positioning plate, in order to meet the requirement of airtight detection of parts at the same time, the support end surface of the positioning column 102 is provided with an airtight detection hole 104, and the positioning plate is internally provided with an air channel communicated with the airtight detection hole 104.

Specifically, the compressing device 11 includes an adapter plate 111 disposed below the positioning plate 101, the adapter plate has three mounting ends disposed in an equilateral triangle shape, each mounting end is provided with a compressing assembly, the compressing assembly includes a compressing seat 113, a rotating plate 114, a connecting rod 115 and a pressing plate 116, each mounting end of the adapter plate 111 is provided with a mounting groove 112, the lower end of the connecting rod 115 is fixedly connected to the mounting groove 112, the rotating plate 114 includes two connecting rods 115, the upper ends of the connecting rods 115 and the bottom ends of the two rotating plates are rotationally connected through pins, the upper ends of the two rotating plates 114 are rotationally connected through the middle positions of the pin pressing plates 116, the end of the pressing plate 16 and the compressing seat 113 are rotationally connected through pins, and the other ends of the pressing plates are used for compressing parts.

More specifically, a bottom plate 15 similar to the shape of the adapter plate 111 is disposed below the adapter plate, the bottom end of each connecting rod 115 is connected to the bottom plate 15, a protective cover 14 is disposed between the positioning plate 101 and the bottom plate 15, the cross-sectional shape of the protective cover 14 is similar to that of the bottom plate, so as to cover the whole adapter plate and the periphery of the connecting rod, and each pressing seat 113 is disposed at the upper end of the protective cover.

Specifically, the pull-down device 13 includes a pull rod 131 penetrating through the bottom plate 15, the adapter plate 111 and the positioning plate 101, wherein the adapter plate 111 is fixedly connected with the pull rod 131, the tensioning device 12 includes a taper sleeve 121, a tensioning sleeve 122 and a pressing component 123, the taper sleeve is arranged in a central hole of the positioning plate 101, the tensioning sleeve 122 is sleeved outside the taper sleeve, and the pressing component 123 is arranged at the top end of the pull rod 131.

More specifically, the cone sleeve 121 includes a base 1211 and a cone frustum 1212, the base 1211 is cylindrical and disposed in a central hole of the bottom plate, the cone frustum 1212 is fixedly connected to the base, the bottom dimension of the cone frustum is larger than the upper dimension, a limit hole 1213 is formed at the connection between the base 1211 and the cone frustum 1212, a limit slot is formed on the pull rod 131, a limit pin is disposed in the limit hole 1213, and the limit pin is movably disposed in the limit slot.

Specifically, the pressing assembly 123 includes a sleeve 1231, a stopper 1232, and a spring 1233, the stopper 1232 is fixedly disposed on the top end of the pull rod 131, the sleeve 1231 has a bottom wall and is sleeved outside the stopper and the pull rod, the spring 1233 is disposed between the sleeve bottom wall and the stopper, and the sleeve bottom wall can be abutted against the top wall of the tensioning sleeve 122.

Working principle: centering the center hole of the part to be processed through the tension sleeve 122, at this time, the pull rod 131 is at the uppermost position, the pressing plate 116 is in a lifting state so as to place the part, after the part is placed, the airtight piece is detected to ensure that the part is placed in place, then the pull rod 131 is pulled down, each pressing plate 116 is driven to be pushed down through the adapter plate 111 to complete the compression of the part, meanwhile, in the pull rod pulling down process, the top of the pull rod is pushed down by the limiting block 1233, the spring 1233 drives the sleeve 1231 to move downwards, the bottom wall of the sleeve drives the tension sleeve 122 to move downwards, the part inner hole is expanded through the cooperation of the taper sleeve, and the positioning compression action is completed.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A pull-down tensioning self-centering clamp, comprising:

the positioning device is used for supporting and positioning the part;

2. The pull-down tensioning self-centering clamp of claim 1, wherein: the positioning device comprises a positioning plate, and a plurality of positioning columns and a plurality of positioning pins are arranged on the positioning plate.

3. The pull-down tensioning self-centering clamp of claim 1, wherein: the pressing device comprises an adapter plate arranged below the positioning device, the adapter plate is provided with a plurality of mounting ends, each mounting end is provided with a pressing component, each pressing component comprises a pressing seat, a rotating plate, a connecting rod and a pressing plate, one end of each connecting rod is fixedly connected to the adapter plate, the other end of each connecting rod is in rotary connection with one end of each rotating plate, and the pressing plates are simultaneously in rotary connection with the other end of each rotating plate and the pressing seats.

4. The pull-down tensioning self-centering clamp of claim 3, wherein: the pull-down device comprises a pull rod which penetrates through the positioning device, and the adapter plate is connected to the pull rod.

5. The pull-down tensioning self-centering clamp of claim 4, wherein: the tensioning device comprises a taper sleeve, a tensioning sleeve and a pressing component, wherein the taper sleeve is arranged on the positioning device, the tensioning sleeve is sleeved outside the taper sleeve, and the pressing component is arranged at the end part of the pull rod.

6. The pull-down tensioning self-centering clamp of claim 5, wherein: the pressing assembly comprises a sleeve, a limiting block and a spring, wherein the limiting block is fixedly arranged at the end part of the pull rod, the sleeve is provided with a bottom wall and sleeved outside the limiting block and the pull rod, the spring is arranged between the bottom wall of the sleeve and the limiting block, and the bottom wall of the sleeve can be abutted with the end part of the tensioning sleeve.

7. The pull-down tensioning self-centering clamp of claim 5, wherein: the pull rod is provided with a limiting groove, the taper sleeve is provided with a limiting pin, and the limiting pin is movably arranged in the limiting groove.

8. The pull-down tensioning self-centering clamp of claim 1, wherein: the self-centering fixture for the pull-down tensioning further comprises a protective cover, and the protective cover is arranged on the outer side of the pressing device.

9. The pull-down tensioning self-centering clamp of claim 1, wherein: and the positioning device is also provided with an airtight detection component.