CN214818053U

CN214818053U - Centering clamping jig

Info

Publication number: CN214818053U
Application number: CN202121439017.9U
Authority: CN
Inventors: 陈晴衍
Original assignee: Guangdong Haorui Measurement And Control Equipment Co ltd
Current assignee: Guangdong Haorui Measurement And Control Equipment Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-11-23
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a centering clamping jig, include: base, reference column, (holding) chuck, carousel and clamp splice. The reference column is fixedly arranged on the upper side of the base and is provided with a central axis arranged along the vertical direction. The chuck is fixedly arranged above the base, and at least three hinged ends are uniformly distributed on the chuck around the circumference of the central axis. The turntable is arranged between the chuck and the base, and the turntable is coaxially and rotatably arranged on the positioning column. The periphery of the rotating disc around the central axis is uniformly distributed with driving grooves. The drive slot includes a proximal end and a distal end joined by a rounded transition. The quantity of clamp splice and drive groove all is unanimous with the quantity of hinged end and one-to-one sets up. The clamping block comprises a clamping part, a hinge part and a driving part. The hinge part is hinged with the hinge end, and the driving part is in transmission connection with the driving groove. The utility model discloses a centering clamping jig drives the clamp splice motion of equipartition simultaneously through the carousel, realizes the centering centre gripping of spare part through the clamping part of clamp splice. The utility model discloses can be applied to in the frock clamp.

Description

Centering clamping jig

Technical Field

The utility model relates to a clamping tool field, in particular to centering clamping tool.

Background

For pipe products with irregular thin-wall flanges, such as air inlet and outlet connecting pipes, pipe adapters and other parts, centering and clamping are generally required during assembly or machining.

In the prior art, conventional clamping tools such as a vice and the like are easy to clamp and damage parts during clamping, so that a large amount of defects are caused; and the conventional tool is difficult to ensure the repeatability control of clamping, and the repeatability precision is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centering clamping jig to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

a centering clamping fixture, comprising: the device comprises a base, a positioning column, a chuck plate, a turntable and a clamping block;

the positioning column is fixedly arranged on the upper side of the base and provided with a central axis arranged along the vertical direction;

the chuck is arranged above the base and is fixedly connected with the positioning column, and at least three hinged ends are uniformly distributed around the circumference of the central axis;

the turntable is arranged between the chuck and the base, the turntable and the central axis are coaxially arranged and coaxially rotatably mounted on the positioning column, the turntable is uniformly distributed with driving grooves which are consistent with the hinged ends in number around the circumference of the central axis, each driving groove comprises a near end and a far end which are connected in a smooth transition manner, and the distance between the far end and the central axis is greater than that between the near end and the central axis;

the number of the clamping blocks is consistent with that of the hinged ends, the clamping blocks correspond to the driving grooves and the hinged ends one to one, each clamping block comprises a clamping portion, a hinged portion and a driving portion, the hinged portion is hinged to the hinged ends, and the driving portion is in transmission connection with the driving grooves.

It should be noted that: the central axis is a virtual feature and is provided for accurately describing the positional relationship.

The utility model provides a centering clamping jig has following beneficial effect at least: the turntable drives the driving part to be close to or far away from the central axis through the driving groove. The hinged part of the clamping block is hinged to the hinged end, so that the clamping block can rotate around the hinged part, and when the driving part is close to the central axis, the clamping part is far away from the central axis; when the driving portion is far away from the central axis, the clamping portion is close to the central axis. The clamping blocks are arranged in one-to-one correspondence with the driving grooves and the hinged ends, so that the turntable can drive the plurality of clamping blocks which are uniformly arranged around the central axis to act simultaneously, the plurality of clamping parts are simultaneously and inwards abutted at positions which keep the same distance with the central line, and the centering, centering and clamping of pipes or cylindrical parts are realized. The utility model discloses a centering clamping jig, through carousel and (holding) chuck cooperation, make a plurality of the clamping part of clamp splice can synchronous motion, is close to or keeps away from simultaneously the axis realizes that centering presss from both sides tightly, and easy operation can control the centre gripping dynamics easily through the rotation angle of carousel, and presss from both sides tight repeated positioning accuracy height, and the practicality is strong.

As a further improvement of the above technical solution, a positioning block is disposed at an upper end of the positioning column, a positioning portion having a truncated cone shape and disposed coaxially with the central axis is disposed at a top of the positioning block, and the positioning block is elastically mounted on the positioning column along an up-down direction. Through the technical scheme, the positioning part in the shape of the truncated cone can be clamped on the inner side of the pipe type part, the inner wall of the pipe type part can be centered, and the positioning part can be centered and clamped better by matching with the clamping blocks.

As a further improvement of the above technical solution, a positioning sleeve is arranged at the upper end of the positioning column, a cylindrical inner cavity is arranged at the upper end of the positioning sleeve, the positioning portion is slidably mounted in the inner cavity along the up-down direction, a compression spring is arranged in the inner cavity along the up-down direction, and the upper end and the lower end of the compression spring are respectively elastically abutted against the bottom of the positioning block and the bottom of the inner cavity. Through the technical scheme, the positioning block can be elastically installed at the upper end of the positioning column along the vertical direction, and the positioning block can elastically retract along the vertical direction, so that the vertical position of the positioning part can be elastically adjusted to adapt to parts with different wall thicknesses.

As a further improvement of the above technical scheme, a cylindrical connecting shaft is arranged on the lower side of the positioning portion, the compression spring is sleeved on the outer side of the connecting shaft, a limiting groove moving up and down is arranged on the outer side of the connecting shaft, the positioning sleeve is provided with a limiting pin arranged along the connecting shaft in the radial direction, and the end portion of the limiting pin is arranged in the limiting groove. Through the technical scheme, the end part of the limiting pin is clamped in the limiting groove, and the limiting pin limits the moving range of the positioning block along the vertical direction, so that the movement of the positioning block is more stable.

As a further improvement of the technical scheme, the positioning sleeve is provided with a pin hole which is arranged along the radial direction of the connecting shaft, the limiting pin is arranged in the pin hole, one end of the pin hole faces the connecting shaft, and the other end of the pin hole is coaxially provided with a jacking screw hole. Through the technical scheme, the limiting pin can be arranged in the pin hole, the positioning block is limited by the end part facing the limiting groove, the jacking screw hole can limit the limiting pin in the pin hole through a jacking screw arranged in the jacking screw hole in a threaded manner, and the limiting pin is prevented from moving along the axial direction of the limiting pin to cause limiting failure.

As a further improvement of the above technical solution, the driving portion is spherical, the driving portion is slidably embedded in the driving groove, and the width of the driving groove corresponds to the driving portion. Through the technical scheme, the clamping block needs to swing around the hinged part, the relative angle between the clamping block and the rotary table can be changed, and the spherical driving part can enable the driving part to be in transmission connection with the driving groove, so that the clamping block is consistent and stable in action.

As a further improvement of the above technical solution, the clamping portion, the hinge portion and the driving portion are sequentially arranged along a straight line direction, the driving portion is threadedly mounted on the clamping block, and a threaded shaft of the driving portion is axially arranged along a connecting line direction of the clamping portion and the hinge portion. The sphere shape the machining precision of drive division requires highly, and at the clamping in-process, the drive division with the drive groove can take place the friction, the drive division adopts wear-resisting material to be good moreover. Through the technical scheme, the driving part is installed on the clamping block in a threaded mode, the driving part and the clamping block can be machined in a split mode, and purchasing and machining cost is reduced; the driving part can also be made of wear-resistant materials different from the clamping blocks.

As a further improvement of the above technical solution, the turntable is disc-shaped, and a push rod extending in the radial direction is disposed outside the turntable. Through the technical scheme, the push rod can conveniently rotate the rotary table, so that the clamping action is easier.

As a further improvement of the technical scheme, the clamping part is provided with a pressing block, the pressing block is detachably arranged on the clamping part, and the pressing block is a soft material product. Through above-mentioned technical scheme, the clamping part carries out the centre gripping through the briquetting to spare part, avoids causing the clamp wound or the impression to the outward appearance of spare part.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic perspective view of an embodiment of a centering and clamping fixture provided in the present invention;

fig. 2 is a front view of an embodiment of the centering and clamping fixture provided in the present invention;

fig. 3 is a front cross-sectional view of an embodiment of the centering and clamping fixture provided in the present invention;

fig. 4 is a top view of an embodiment of a centering and clamping fixture provided in the present invention;

fig. 5 is a top sectional view of an embodiment of the centering and clamping fixture provided in the present invention;

fig. 6 is a partially enlarged view of the area a in fig. 3.

In the figure, 100, a base, 200, a positioning column, 210, a positioning block, 211, a positioning part, 212, a connecting shaft, 213, a limiting groove, 220, a positioning sleeve, 221, an inner cavity, 222, a compression spring, 223, a limiting pin, 224, a jacking screw hole, 300, a chuck plate, 310, a hinged end, 400, a rotary plate, 410, a driving groove, 411, a near end, 412, a far end, 420, a push rod, 500, a clamping block, 510, a clamping part, 511, a pressing block, 520, a hinged part, 530 and a driving part.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 6, the centering and clamping jig of the present invention is provided with the following embodiments:

a centering clamping fixture, comprising: a base 100, positioning posts 200, a chuck 300, a turntable 400, and clamping blocks 500.

The positioning column 200 is fixedly installed in the middle of the upper side of the base 100. The positioning column 200 has a central axis arranged in the up-down direction. The upper end of the positioning column 200 is provided with a positioning sleeve 220 and a positioning block 210.

The positioning block 210 includes a positioning portion 211 and a connecting shaft 212. The positioning portion 211 is disposed at the top of the positioning block 210, the positioning portion 211 is in a truncated cone shape, the connecting shaft 212 is in a cylindrical shape, and the connecting shaft 212 is coaxially disposed at the lower side of the positioning portion 211.

The positioning sleeve 220 is fixedly mounted on the upper end of the positioning column 200. The upper end of the positioning sleeve 220 is provided with a cylindrical inner cavity 221 which is coaxial with the central axis. The positioning portion 211 is coaxially slidably mounted in the inner cavity 221 in the vertical direction. The inner chamber 221 is provided with a compression spring 222 disposed in the up-down direction. The compression spring 222 is sleeved outside the connecting shaft 212, and upper and lower ends of the compression spring 222 are respectively elastically abutted against the bottom of the positioning block 210 and the bottom of the inner cavity 221.

The outer side of the connecting shaft 212 is provided with a limit groove 213 which runs up and down. The positioning sleeve 220 is provided with a pin hole arranged along the radial direction of the connecting shaft 212, one end of the pin hole faces the connecting shaft 212, and the other end of the pin hole is coaxially provided with a jacking screw hole 224. A limit pin 223 is installed in the pin hole, and one end of the limit pin 223 is arranged in the limit groove 213. The jacking screw hole 224 is provided with a jacking screw in a threaded manner, and the limit pin 223 is arranged between the jacking screw and the limit groove 213.

The chuck 300 is disposed at the lower side of the positioning sleeve 220 and is fixedly connected with the positioning post 200. The chuck 300 has three hinged ends 310 uniformly distributed around the circumference of the central axis.

The turntable 400 is disposed between the chuck 300 and the base 100 in a disc shape. The turntable 400 is coaxially arranged with the central axis and coaxially rotatably mounted on the positioning column 200. The rotating disk 400 has three driving grooves 410 uniformly distributed around the circumference of the central axis. The driving groove 410 includes a proximal end 411 and a distal end 412 connected in a smooth transition manner, and a distance between the distal end 412 and the central axis is greater than a distance between the proximal end 411 and the central axis. A radially extending push rod 420 is fixedly installed at the outer side of the rotary plate 400.

There are three clamping blocks 500, and three clamping blocks 500 correspond to the driving grooves 410 and the hinged ends 310 one by one. The clamp block 500 includes a clamping portion 510, a hinge portion 520, and a driving portion 530.

A pressing block 511 is detachably mounted on one side of the clamping portion 510 facing the positioning column 200. The compact 511 is a soft material product. The material of the pressing block 511 may be set according to the material and thickness of the clamped product. The material of the pressing block 511 may be plastic such as POM plastic, plastic steel, etc., or high-strength rubber, etc.

The driving portion 530 is in transmission connection with the driving groove 410. In this embodiment, the driving portion 530 is in a spherical shape, the driving groove 410 is a through groove penetrating vertically, the width of the driving groove 410 corresponds to the driving portion 530, and the driving portion 530 is slidably embedded in the driving groove 410. The driving groove 410 is synchronously connected with the driving part 530 along the radial direction of the turntable 400 through two groove walls thereof. In other embodiments, the driving slot 410 may be provided with only outward slot walls, and the driving portion 530 elastically abuts against the driving slot 410 to realize radial synchronous connection.

In this embodiment, the clamping block 500 is elongated, and the clamping portion 510, the hinge portion 520, and the driving portion 530 are sequentially disposed along a linear direction. The driving portion 530 is threadedly mounted to the clamping block 500, and the threaded shaft of the driving portion 530 is axially arranged along a line connecting the clamping portion 510 and the hinge portion 520. In some embodiments, the clamping block 500 may be configured in an arc shape, a hook shape, or other shapes as needed.

The hinge portion 520 is hinged to the hinge end 310. In this embodiment, the coupling end 310 is shaped like a "U" and has two ends extending outwards, the clamping block 500 is disposed between the two ends, a hinge pin is disposed between the two ends, the axial direction of the hinge pin is perpendicular to the central axis, the hinge portion 520 of the clamping block 500 is rotatably coupled to the hinge pin, and the rotational axis of the clamping block 500 is disposed along the axial direction of the hinge pin.

In addition, for embodiments in which the number of the hinged end 310, the driving groove 410 or the clamping block 500 is greater than three, reference may be made to various examples of the centering and clamping jig, and various examples will not be further described here.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. The utility model provides a centering presss from both sides tight tool which characterized in that: the method comprises the following steps:

a base (100);

the positioning column (200) is fixedly arranged on the upper side of the base (100), and the positioning column (200) is provided with a central axis arranged along the vertical direction;

the chuck (300) is arranged above the base (100) and is fixedly connected with the positioning column (200), and at least three hinged ends (310) are uniformly distributed on the chuck (300) in the circumferential direction of the central axis;

the rotating disc (400) is arranged between the chuck (300) and the base (100), the rotating disc (400) and the central axis are coaxially arranged and coaxially rotatably mounted on the positioning column (200), the driving grooves (410) with the number consistent with that of the hinged end (310) are uniformly distributed on the rotating disc (400) in the circumferential direction of the central axis, each driving groove (410) comprises a near end (411) and a far end (412) which are connected in a smooth transition mode, and the distance between each far end (412) and the central axis is larger than that between each near end (411) and the central axis;

the clamping blocks (500) correspond to the hinged ends (310) one by one, the clamping blocks (500) correspond to the driving grooves (410) and the hinged ends (310), each clamping block (500) comprises a clamping portion (510), a hinge portion (520) and a driving portion (530), the hinge portions (520) are hinged to the hinged ends (310), and the driving portions (530) are in transmission connection with the driving grooves (410).

2. The centering and clamping jig according to claim 1, characterized in that: the positioning device is characterized in that a positioning block (210) is arranged at the upper end of the positioning column (200), a positioning part (211) which is in a truncated cone shape and is coaxial with the central axis is arranged at the top of the positioning block (210), and the positioning block (210) is elastically installed on the positioning column (200) along the vertical direction.

3. The centering and clamping jig according to claim 2, characterized in that: the upper end of reference column (200) is equipped with locating sleeve (220), the upper end of locating sleeve (220) is equipped with columniform inner chamber (221), location portion (211) along upper and lower direction slidable mounting in inner chamber (221), inner chamber (221) are equipped with along the compression spring (222) that upper and lower direction set up, the upper and lower both ends of compression spring (222) elasticity respectively butt in the bottom of locating piece (210) and the bottom of inner chamber (221).

4. The centering and clamping jig according to claim 3, characterized in that: the downside of location portion (211) is equipped with columniform connecting axle (212), compression spring (222) cover is located the outside of connecting axle (212), the outside of connecting axle (212) is equipped with spacing groove (213) of trend from top to bottom, position sleeve (220) are equipped with the edge spacing pin (223) that connecting axle (212) radially set up, the tip of spacing pin (223) is located in spacing groove (213).

5. The centering and clamping jig according to claim 4, characterized in that: the locating sleeve (220) is provided with a pin hole which is arranged along the radial direction of the connecting shaft (212), the limiting pin (223) is installed in the pin hole, one end of the pin hole faces towards the connecting shaft (212), and the other end of the pin hole is coaxially provided with a jacking screw hole (224).

6. The centering and clamping jig according to claim 1, characterized in that: the driving part (530) is in a spherical shape, the driving part (530) is embedded in the driving groove (410) in a sliding mode, and the width of the driving groove (410) corresponds to that of the driving part (530).

7. The centering and clamping jig according to claim 6, characterized in that: the clamping part (510), the hinge part (520) and the driving part (530) are sequentially arranged along a straight line direction, the driving part (530) is installed on the clamping block (500) in a threaded mode, and the threaded shaft of the driving part (530) is axially arranged along the connecting line direction of the clamping part (510) and the hinge part (520).

8. The centering and clamping jig according to claim 1, characterized in that: the rotary disc (400) is disc-shaped, and a push rod (420) extending along the radial direction is arranged on the outer side of the rotary disc (400).

9. The centering and clamping jig according to claim 1, characterized in that: the clamping part (510) is provided with a pressing block (511), the pressing block (511) is detachably mounted on the clamping part (510), and the pressing block (511) is made of soft materials.