CN108723892B

CN108723892B - Indexing chuck

Info

Publication number: CN108723892B
Application number: CN201710247789.4A
Authority: CN
Inventors: 吴亚爵
Original assignee: Shanghai Ruiqimei Trading Co ltd
Current assignee: Shanghai Ruiqimei Trading Co ltd
Priority date: 2017-04-17
Filing date: 2017-04-17
Publication date: 2020-06-09
Anticipated expiration: 2037-04-17
Also published as: CN108723892A

Abstract

An indexing chuck comprises a chuck seat, an indexing shaft, a piston and a positioning shaft, wherein the indexing shaft is rotatably arranged in the chuck seat, the piston is transversely arranged in the chuck seat in a reciprocating manner, and the positioning shaft is axially arranged in the chuck seat in a moving manner along the indexing shaft; therefore, the indexing chuck of the invention not only can simplify the structure to reduce the cost, but also can increase the propping force of the positioning shaft to the workpiece by utilizing the matching between the first oblique guide part and the second oblique guide part when the indexing chuck is acted by the centrifugal force.

Description

Indexing chuck

Technical Field

The present invention relates to a lathe chuck, and more particularly, to an index chuck capable of effectively simplifying a structure.

Background

The index chuck is mainly used for supporting a workpiece on an index shaft by using a telescopic ejector rod, after each process is finished, the angle of the workpiece relative to a cutter is adjusted by the index shaft, the next process can be directly carried out after the angle adjustment is finished, and the position of the workpiece does not need to be corrected again, so that the problem of precision caused by repeated assembly and disassembly of the workpiece is solved.

In the conventional technology, the top rod achieves the effects of extension and shortening through mutual matching of the gear rack and the worm gear, but the transmission parts increase the structural complexity and lead to the increase of the manufacturing cost.

Disclosure of Invention

The present invention has been made in an effort to provide an indexing chuck which can simplify a structure to reduce manufacturing costs.

In order to achieve the above object, the index chuck of the present invention comprises a chuck base, an index shaft, and a positioning assembly. The center of the clamping seat is provided with a workpiece accommodating groove, the clamping seat is respectively provided with an indexing shaft groove communicated with the workpiece accommodating groove and a positioning shaft groove communicated with the workpiece accommodating groove on two opposite sides of the workpiece accommodating groove, and in addition, the clamping seat is also provided with a piston groove radially communicated with the positioning shaft groove; the indexing shaft is rotatably arranged in the indexing shaft groove of the clamping seat and is used for driving the workpiece to rotate so as to adjust the angle; the positioning assembly is provided with a piston and a positioning shaft, the piston can be horizontally movably arranged in a piston groove of the clamping seat and is provided with a first oblique guide part, the positioning shaft can be axially movably arranged in a positioning shaft groove of the clamping seat and is provided with a second oblique guide part, and the first oblique guide part of the piston and the second oblique guide part of the positioning shaft are mutually clamped, so that the positioning shaft can be close to or far away from the indexing shaft towards the indexing shaft by the movement of the piston in the piston groove, and the effect of positioning the workpiece or releasing the workpiece is further achieved.

It can be seen from the above description that the index chuck of the present invention uses the inclined plane guide to drive the positioning shaft to move forward or backward, and various transmission parts used in the prior art are omitted in terms of structure, so that the purpose of simplifying the structure can be achieved.

More preferably: the first inclined guiding part protrudes from the outer peripheral surface of the piston, and the second inclined guiding part is formed by sinking from the outer peripheral surface of the positioning shaft. Therefore, after the first oblique guide part and the second oblique guide part are mutually clamped, the positioning shaft achieves the effect of advancing and retreating by the transverse movement of the piston.

More preferably: the first oblique guiding portion of the piston is provided with a first end and a second end, the distance between the first end and the workpiece accommodating groove of the clamping seat is larger than the distance between the second end and the workpiece accommodating groove of the clamping seat, when the second oblique guiding portion of the positioning shaft is positioned at the first end of the first oblique guiding portion of the piston, the positioning shaft is positioned in the positioning shaft groove of the clamping seat, the workpiece can be installed on the indexing shaft at the moment, when the second oblique guiding portion of the positioning shaft is positioned at the second end of the first oblique guiding portion of the piston, the positioning shaft extends out of the positioning shaft groove of the clamping seat, and the positioning shaft can push the workpiece to complete positioning. After the positioning of the workpiece is completed, the positioning shaft moves towards the second end of the first inclined guide part of the piston under the action of centrifugal force, so that the positioning shaft can increase the jacking force on the workpiece, and the purpose of improving the processing stability is achieved.

The detailed construction, features, assembly or manner of use of the index collet provided by the present invention will be described in the detailed description of the embodiments which follow. However, those of ordinary skill in the art should understand that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Drawings

Fig. 1 is an external perspective view of an index collet of the present invention.

Fig. 2 is an exploded perspective view of the index collet of the present invention.

Figure 3 is an exploded perspective view of a positioning assembly provided with the index collet of the present invention.

Fig. 4 is a partial top cross-sectional view of the index collet of the present invention, showing primarily the workpiece mounted on the index shaft.

FIG. 5 is another partial top cross-sectional view of the index collet of the present invention, shown generally with the locating shaft positioned to locate a workpiece.

FIG. 6 is a view similar to FIG. 5, and shows the index collet rotating with the workpiece.

(symbol description)

10 … index collet 12 … workpiece

20 … holder 21 … seat body

211 … elongated groove 213 … first arc groove

215 … second arc groove 22 … cover

221 … opening 223 … third arc groove

225 … fourth arc chute 23 … workpiece receiving chute

24 … indexing shaft slot 25 … positioning shaft slot

26 … piston groove 27 … end plug

30 … index shaft 40 … positioning assembly

50 … piston 51 … first angled guide

52 … first end 53 … second end

60 … second angled guide for positioning shaft 61 …

Detailed Description

Referring to fig. 1 to 3, an index chuck 10 of the present invention includes a chuck base 20, an index shaft 30, and a positioning assembly 40.

The holder 20 has a base 21 and a cover 22 covering the base 21, the base 21 has a strip-shaped groove 211 at the center, the cover 22 has an opening 221, and the opening 221 of the cover 22 is correspondingly communicated with the strip-shaped groove 211 of the base 21, so that the two jointly form a workpiece accommodating groove 23. The base body 21 is provided with a first arc groove 213 communicated with the elongated groove 211 and a second arc groove 215 communicated with the elongated groove 211 on two opposite sides of the elongated groove 211, the cover body 22 is provided with a third arc groove 223 communicated with the opening 221 and a fourth arc groove 225 communicated with the opening 221 on two opposite sides of the opening 221, the first arc groove 213 of the base body 21 corresponds to the third arc groove 223 of the cover body 22, so that an indexing shaft groove 24 communicated with the workpiece accommodating groove 23 is formed between the first arc groove and the second arc groove, the second arc groove 215 of the base body 21 corresponds to the fourth arc groove 225 of the cover body 22, so that a positioning shaft groove 25 communicated with the workpiece accommodating groove 23 is formed between the first arc groove and the second arc groove, and the indexing shaft groove 24 and the positioning shaft groove 25 are coaxially corresponding to each other.

In addition, the seat body 21 further has a piston groove 26 and an end plug 27, the extending direction of the piston groove 26 is parallel to the extending direction of the workpiece receiving groove 23, the center of the piston groove 26 is in radial communication with the positioning shaft groove 25, and the end plug 27 is provided at one end opening of the piston groove 26 for closing the piston groove 26.

The index shaft 30 is rotatably disposed in the index shaft groove 24 of the holder 20 in situ, and is used for fixing the workpiece 12, so that the workpiece 12 can be angularly adjusted by the rotation of the index shaft 30.

The positioning assembly 40 has a piston 50 and a positioning shaft 60. The piston 50 is disposed in the piston groove 26 of the cartridge 20, and is horizontally reciprocated between both ends of the piston groove 26 by the action of fluid pressure, and the positioning shaft 60 is disposed in the positioning shaft groove 25 of the cartridge 20 so as to be axially movable along itself.

In addition, as shown in fig. 3, the outer peripheral surface of the piston 50 protrudes out of the first inclined guiding portion 51, the outer peripheral surface of the positioning shaft 60 is recessed into the second inclined guiding portion 61, and the piston 50 and the positioning shaft 60 are clamped together by the first and second inclined guiding

portions

51, 61, wherein the length of the first inclined guiding portion 51 of the piston 50 is greater than the length of the second inclined guiding portion 61 of the positioning shaft 60, the first inclined guiding portion 51 of the piston 50 has a first end 52 and a second end 53, and the distance between the first end 52 and the workpiece receiving groove 23 is greater than the distance between the second end 53 and the workpiece receiving groove 23.

As can be seen from the above description, when the piston 50 is located at the left end of the piston groove 26, as shown in fig. 4, the second inclined guiding portion 61 of the positioning shaft 60 is located at the first end 52 of the first inclined guiding portion 51 of the piston 50, so that the positioning shaft 60 does not extend out of the positioning shaft groove 25 of the chuck 20, and at this time, the user can place the workpiece 12 in the workpiece receiving groove 23 of the chuck 20 and fix the workpiece to the index shaft 30.

After the fixing of the workpiece 12 is completed, as shown in fig. 5, the piston 50 is pushed by the fluid pressure from the left end of the piston groove 26 to the right end of the piston groove 26, the second inclined guiding portion 61 of the positioning shaft 60 is pushed by the first inclined guiding portion 51 during the movement of the piston 50, so that the positioning shaft 60 gradually extends out of the positioning shaft groove 25, until the second inclined guiding portion 61 of the positioning shaft 60 is located at the second end 53 of the first inclined guiding portion 51 of the piston 50, the positioning shaft 60 will push the workpiece 12, at this time, the positioning of the workpiece 12 is completed, and then the workpiece 12 can be driven to rotate together with respect to the tool (not shown), so that the tool can cut the workpiece 12.

In the process of driving the workpiece 12 to rotate together, the centrifugal force applied to the positioning shaft 60 itself will cause the positioning shaft 60 to move toward the second end 53 of the first inclined guiding portion 51 of the piston 50, so that the positioning shaft 60 can increase the supporting force on the workpiece 12 under the continuous action of the centrifugal force, so as to further improve the stability of the workpiece 12, and further obtain good processing precision.

In summary, the index chuck 10 of the present invention utilizes the inclined surface guiding manner to drive the positioning shaft 60 to move forward or backward, so that various transmission parts used in the prior art are omitted, thereby achieving the effect of simplifying the structure, and the stability can be increased by the centrifugal force during the processing of the workpiece 12, thereby achieving the purpose of improving the processing precision.

Claims

1. An indexing chuck, comprising:

the clamping seat is provided with a workpiece accommodating groove, two opposite sides of the workpiece accommodating groove are respectively provided with an indexing shaft groove communicated with the workpiece accommodating groove and a positioning shaft groove communicated with the workpiece accommodating groove, and the clamping seat is also provided with a piston groove radially communicated with the positioning shaft groove;

an index shaft rotatably provided in the index shaft groove of the holder; and

locating component, it has piston and location axle, the piston is located with the mode that can horizontal migration the holder the piston inslot just has first slant guide portion, the location axle is located with the mode that can follow axial displacement itself the holder the location axle inslot just has second slant guide portion, the piston first slant guide portion with the location axle the mutual joint between the second slant guide portion makes the location axle can pass through the horizontal migration of piston and court the graduation axle is close to or keeps away from the graduation axle.

2. The index chuck of claim 1,

the outer peripheral surface of the piston protrudes out of the first oblique guide part in a protruding mode, and the outer peripheral surface of the positioning shaft is recessed out of the second oblique guide part.

3. The index chuck of claim 1,

the first oblique guiding portion of the piston is provided with a first end and a second end, the distance between the first end and the workpiece accommodating groove of the clamping seat is larger than the distance between the second end and the workpiece accommodating groove of the clamping seat, when the second oblique guiding portion of the positioning shaft is positioned at the first end of the first oblique guiding portion of the piston, the positioning shaft is positioned in the positioning shaft groove of the clamping seat, and when the second oblique guiding portion of the positioning shaft is positioned at the second end of the first oblique guiding portion of the piston, the positioning shaft extends out of the positioning shaft groove of the clamping seat.

4. An index chuck according to claim 3,

when the second inclined guide portion of the positioning shaft is located at the second end of the first inclined guide portion of the piston, the positioning shaft is held at the second end of the first inclined guide portion of the piston by a rotational centrifugal force applied to the positioning shaft itself.

5. The index chuck of claim 1,

the indexing shaft groove and the positioning shaft groove are in coaxial correspondence.

6. The index chuck of claim 1,

the extending direction of the workpiece accommodating groove is parallel to the extending direction of the piston groove.

7. The index chuck of claim 1,

the length of the first inclined guiding part is greater than that of the second inclined guiding part.