CN218283782U

CN218283782U - Clamp for turning of belt wheel shaft

Info

Publication number: CN218283782U
Application number: CN202123044689.2U
Authority: CN
Inventors: 单斌; 余志华; 陈嘉诚; 叶和顺; 陆一骏; 金超群; 王健; 程盛; 杨康乐
Original assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Current assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2023-01-13
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to a band pulley axle anchor clamps for lathe work belongs to anchor clamps technical field, band pulley axle work piece both ends have the centre bore, and it includes along the self-centering chuck of radial tight work piece of clamp, the front end that installs the jack catch from the centering chuck is fixed with be used for with the work piece on the bellied end face contact's of annular positioning disk, the axis of positioning disk with from the axis coincidence of centering chuck, sliding fit has the top of floating that can follow its axis removal in the positioning disk the top work end that floats extends to the front end outside of positioning disk, the top non-work end that floats with be equipped with elastic element between the positioning disk. The utility model has the advantages of can realize the terminal surface location to the work piece to can realize the axial positioning to the work piece, can effectively prevent that the work piece from adding man-hour emergence endwise slip, thereby can guarantee the precision of processing and the quality of product.

Description

Clamp for turning of belt wheel shaft

Technical Field

The utility model relates to a band pulley is anchor clamps for lathe work belongs to anchor clamps technical field.

Background

In the hot rear turning process of the pulley shaft of the continuously variable transmission, the positioning and clamping of a workpiece are generally realized through the matching of a floating center and a chuck. The existing Chinese patent No. 201510007498.9 has the patent name of a turning patent with a floating center clamping device, and comprises a main shaft, a tail top, a chuck seat, a pulling block, a pull rod, a sliding block, a clamping jaw and a floating center, wherein the chuck seat is positioned at the center of the front end of the main shaft, the pulling block is positioned at the center inside the chuck seat, the pull rod is positioned at the center of the left end of the pulling block, the sliding block is positioned at the center of the upper side of the front end of the chuck seat, the clamping jaw is positioned at the center of the upper side of the front end of the chuck seat, and the floating center is positioned at the center of the front end of the chuck seat. It also has the following disadvantages: axial sliding easily occurs during processing of workpieces positioned by a floating center and clamped by a chuck, so that the workpieces are loosened, the processing precision is reduced, and the quality of products is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a band pulley shaft is anchor clamps for lathe work, the work piece that has solved to exist among the prior art through floating center location and chuck centre gripping takes place endwise slip man-hour easily, leads to the work piece to appear becoming flexible for the precision of processing reduces, influences the quality scheduling problem of product.

The above technical purpose of the present invention is mainly solved by the following technical solutions: the fixture for turning the belt wheel shaft comprises a self-centering chuck which radially clamps a workpiece, wherein a positioning disc which is used for being in contact with an end face of an annular bulge on the workpiece is fixed at the front end of the self-centering chuck, which is provided with clamping jaws, the axis of the positioning disc is overlapped with the axis of the self-centering chuck, a floating center which can move along the axis of the positioning disc is slidably arranged in the positioning disc, the floating center is used for being propped in a central hole at one end of the workpiece, the working end of the floating center extends to the outer side of the front end of the positioning disc, an elastic element is arranged between the non-working end of the floating center and the positioning disc, a tail frame center which is overlapped with the axis of the floating center is arranged on the front side of the floating center, and the tail frame center can axially move to be propped in the central hole at the other end of the workpiece.

The utility model discloses during the device uses, at first the band pulley axle work piece level that will treat processing is placed between floating top and tailstock centre, and make floating top in the work piece centre of one end wherein, tailstock top is in the centre bore of the work piece other end, make tailstock centre carry out axial displacement again in order to promote work piece and floating top to removing from centering chuck direction, thereby make the elastic element compression, with the effect of floating location, it realizes the terminal surface location to contact with the front end of positioning disk on the work piece until annular bellied terminal surface and positioning disk, with this axial positioning who realizes the work piece, make the axis and the floating top of work piece simultaneously, tailstock centre's axis coincidence, with this location that realizes the work piece axis, then make from centering chuck's jack catch along its radial synchronous motion press from both sides tight work piece, from this realization to the location and the clamp of work piece, the utility model discloses a positioning disk can realize the terminal surface location to the work piece with the bellied end face contact of annular on the work piece, thereby can realize the axial positioning to the work piece, can prevent effectively that axial slip from taking place man-hour from adding, thereby can guarantee the precision of processing and the quality of product.

Preferably, a floating hole with an opening at the front end is formed in the positioning disc, the axis of the floating hole is overlapped with the axis of the positioning disc, the floating center is slidably arranged in the floating hole, an installation hole with an opening at the end is formed at one end of the floating center, which is located in the floating hole, and the elastic element is arranged between the bottom wall of the floating hole and the bottom wall of the installation hole.

Through being formed with the unsteady hole of front end open-ended in the positioning disk, the axis in unsteady hole and the axis coincidence of positioning disk, floating centre sliding fit is in unsteady downthehole, and floating centre is located the one end in the unsteady downthehole and is formed with this end open-ended mounting hole, and elastic element locates between the diapire in unsteady hole and the diapire of mounting hole for floating centre when sliding along the unsteady hole, can make elastic element compression or extension, in order to reach the purpose of unsteady location.

Preferably, the positioning disc is circumferentially provided with three extending portions, the three extending portions are distributed in a circular array along the axis of the positioning disc, the front ends of the three extending portions are respectively provided with positioning portions extending forwards horizontally, and the three positioning portions are distributed in a circular array along the axis of the positioning disc.

Be formed with three extension through the circumference at the positioning disk, three extension is circular array distribution with the axis of positioning disk, and the front end of three extension is formed with the location portion that the level equidistance extended forward respectively, and three location portion is circular array distribution with the axis of positioning disk for the extension end of three location portion can with the bellied terminal surface contact of annular on the work piece, with the realization to the terminal surface location of work piece, thereby realize the axial positioning to the work piece.

As preferred, be three-jaw chuck from the centering chuck, three jack catch from the centering chuck is located the radial outside of positioning disk is formed with the confession between two adjacent location portions let the space that a jack catch from the centering chuck passes through.

Through setting up to the three-jaw chuck from centering the chuck, be located the radial outside of positioning disk from the three jack catch of centering the chuck, be formed with the space of stepping down that a jack catch that supplies from centering the chuck passes through between two adjacent location portions, make and carry out the axial positioning back to the work piece through location portion, the three jack catch from centering the chuck can move to the radial outside of work piece through the space of stepping down that corresponds respectively and press from both sides it tightly, so that realize the clamp tight and relax the work piece through the jack catch.

Preferably, a limiting part used for radially limiting the floating center is arranged in the positioning disc.

Through be equipped with in the positioning disk and be used for carrying out radial spacing locating part to floating center for floating center can not take place radial movement, so that realize the axis location to the work piece.

Preferably, the limiting part comprises a limiting rod located on the radial outer side of the floating center, the limiting rod is in threaded fit with the positioning disc, one end of the limiting rod extends to the circumferential outer side of the positioning disc, an inward concave limiting groove is formed in the circumferential outer wall of the floating center, the other end of the limiting rod extends into the limiting groove, and the limiting groove extends horizontally along the axial direction of the floating center.

Through be equipped with the gag lever post that is located the top radial outside that floats in the locating part, gag lever post and positioning disk screw-thread fit, gag lever post one end extends to the positioning disk circumference outside, top circumference outer wall that floats is formed with the spacing groove of indent, the gag lever post other end extends to the spacing inslot, the axial level that the spacing groove is top along floating extends, make the rotation through the gag lever post can make its tank bottom counterbalance with the spacing groove, with this can prevent top radial movement that floats, thereby realize the radial spacing to top floating.

Therefore, the utility model has the advantages of can realize the terminal surface location to the work piece to can realize the axial positioning to the work piece, can effectively prevent that the work piece from adding man-hour emergence endwise slip, thereby can guarantee the precision of processing and the quality of product.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic cross-sectional view of the positioning plate of the present invention;

FIG. 3 is a schematic side view of the positioning plate of the present invention;

fig. 4 is a schematic sectional view of the floating center according to the present invention.

The scores in the figures are as follows: 1. a self-centering chuck; 2. a claw; 3. positioning a plate; 4. a floating center; 5. an elastic element; 6. a tailstock center; 7. a floating hole; 8. a limiting member; 9. a limiting rod; 10. a limiting groove; 11. an extension portion; 12. a positioning part; 13. mounting holes; 14. a space of abdicating; 15. an annular protrusion.

Detailed Description

The technical solution of the present invention is further specifically described below by way of embodiments and with reference to the accompanying drawings.

As shown in fig. 1, fig. 2 and fig. 4, a clamp for band pulley shaft turning, band pulley shaft work piece both ends have the centre bore and its annular arch 15 that still is formed with radial extension, include along the radial self-centering chuck 1 that presss from both sides tight work piece, self-centering chuck 1 is the three-jaw chuck, three jack catch 2 from centering chuck 1 is located the radial outside of positioning disk 3, the front end that self-centering chuck 1 installed jack catch 2 is fixed with the positioning disk 3 that is used for with the protruding 15 of annular end contact on the work piece, positioning disk 3 is connected with self-centering chuck 1 through the screw, the axis of positioning disk 3 coincides with the axis from centering chuck 1, sliding fit has the floating centre 4 that can remove along its axis in positioning disk 3, floating centre 4 is used for pushing up in the centre bore of work piece one end wherein, be formed with front end open-ended floating bore 7 in positioning disk 3, the axis of floating centre 7 coincides with the axis of positioning disk 3, floating centre 4 sliding fit in floating centre bore 7, the working end of floating centre 4 extends to the positioning disk 3 the front end outside, the floating centre 4 is equipped with floating centre bore 6 and the floating centre bore 3, the bottom wall is equipped with floating centre 5 and is located floating centre bore 6, the floating centre bore 6 is located floating centre bore of floating centre bore between the floating centre bore 6, the floating centre mounting element 13.

As shown in fig. 1, fig. 3 and fig. 4, three extension portions 11 are formed in the circumferential direction of the positioning disk 3, the three extension portions 11 are located on the radial outer side of the floating hole 7, the three extension portions 11 and three jaws 2 of the self-centering chuck 1 are alternately arranged along the circumferential direction of the positioning disk 3 at intervals, the three extension portions 11 are distributed in a circular array manner with the axis of the positioning disk 3, front ends of the three extension portions 11 are respectively formed with positioning portions 12 extending horizontally forward at equal intervals, the three positioning portions 12 are distributed in a circular array manner with the axis of the positioning disk 3, an abdicating space 14 for the passage of one jaw 2 of the self-centering chuck 1 is formed between two adjacent positioning portions 12, a limiting member 8 for performing radial limiting on the floating center 4 is arranged in the positioning disk 3, the limiting member 8 includes a limiting rod 9 located on the radial outer side of the floating center 4, the limiting rod 9 is a hexagon socket head cap screw, the limiting rod 9 is in threaded fit with the positioning disk 3, one end of the limiting rod 9 extends to the circumferential outer side of the positioning disk 3, an inner concave limiting groove 10 is formed on the circumferential outer wall of the floating center 4, the limiting groove 10 is formed on the outer wall of the floating center 4, the limiting groove 10, the limiting groove 9 is a bar groove, the other end of the limiting rod 9 extends to the limiting groove 10, the limiting groove extends to the limiting groove 10, the axial direction of the floating center groove 4.

When the embodiment is implemented, a to-be-machined workpiece with a wheel shaft is horizontally placed between a floating center 4 and a tailstock center 6, the floating center 4 is pressed against a central hole at one end of the workpiece, the tailstock center 6 is pressed against a central hole at the other end of the workpiece, then the tailstock center 6 is moved axially to push the workpiece and the floating center 4 to move towards the self-centering chuck 1, so that the elastic element 5 is compressed to play a role in floating positioning, until the end face of an annular bulge 15 on the workpiece is contacted with the extending ends of three positioning parts 12 to realize end face positioning, so that the axial positioning of the workpiece is realized, meanwhile, the axis of the workpiece is superposed with the axes of the floating center 4 and the tailstock center 6 to realize the axial positioning of the workpiece, and then the jaws 2 of the self-centering chuck 1 move synchronously along the radial direction to clamp the workpiece, so that the positioning and the clamping of the workpiece are realized.

The utility model has the advantages of can realize the terminal surface location to the work piece to can realize the axial positioning to the work piece, can prevent effectively that the work piece from taking place endwise slip man-hour, thereby can guarantee the precision of processing and the quality of product.

Claims

1. The utility model provides a band pulley shaft anchor clamps for lathe work, band pulley shaft work piece both ends have centre bore, its characterized in that: the self-centering chuck comprises a self-centering chuck (1) for radially clamping a workpiece, wherein a positioning disc (3) which is fixed at the front end of a clamping jaw (2) and is used for contacting with the end face of an annular bulge on the workpiece is arranged on the self-centering chuck (1), the axis of the positioning disc (3) is overlapped with the axis of the self-centering chuck (1), a floating tip (4) capable of moving along the axis of the positioning disc is arranged in the positioning disc (3) in a sliding mode, the floating tip (4) is used for being propped in a central hole at one end of the workpiece, the working end of the floating tip (4) extends to the outer side of the front end of the positioning disc (3), an elastic element (5) is arranged between the non-working end of the floating tip (4) and the positioning disc (3), a tailstock tip (6) overlapped with the axis of the floating tip (4) is arranged on the front side of the floating tip (4), and the tailstock tip (6) can axially move to be propped in the central hole at the other end of the workpiece.

2. The clamp for turning of the pulley shaft according to claim 1, wherein: a floating hole (7) with an opening at the front end is formed in the positioning disc (3), the axis of the floating hole (7) is overlapped with the axis of the positioning disc (3), the floating tip (4) is arranged in the floating hole (7) in a sliding mode, a mounting hole (13) with an opening at the end is formed in one end, located in the floating hole (7), of the floating tip (4), and the elastic element (5) is arranged between the bottom wall of the floating hole (7) and the bottom wall of the mounting hole (13).

3. The jig for turning of a pulley shaft according to claim 1 or 2, characterized in that: the circumference of positioning disk (3) is formed with three extension (11), and is three extension (11) with the axis of positioning disk (3) is circular array and distributes, and is three the front end of extension (11) is formed with horizontal forward equidistance extension's location portion (12) respectively, and is three location portion (12) with the axis of positioning disk (3) is circular array and distributes.

4. The clamp for turning of the pulley shaft as claimed in claim 3, wherein: from centering chuck (1) for the three-jaw chuck, be located from three jack catch (2) of centering chuck (1) the radial outside of positioning disk (3) is formed with the confession between two adjacent location portion (12) let a space (14) by what jack catch (2) of centering chuck (1) passed through.

5. The jig for turning of a pulley shaft according to claim 1 or 2, characterized in that: and a limiting part (8) used for radially limiting the floating center (4) is arranged in the positioning disc (3).

6. The clamp for turning of the pulley shaft as claimed in claim 5, wherein: the limiting part (8) comprises a limiting rod (9) located on the radial outer side of the floating center (4), the limiting rod (9) is in threaded fit with the positioning disc (3), one end of the limiting rod (9) extends to the circumferential outer side of the positioning disc (3), a concave limiting groove (10) is formed in the circumferential outer wall of the floating center (4), the other end of the limiting rod (9) extends into the limiting groove (10), and the limiting groove (10) extends along the axial direction of the floating center (4) in a horizontal mode.