CN216575907U

CN216575907U - Clamp for hobbing thin workpiece

Info

Publication number: CN216575907U
Application number: CN202122935326.1U
Authority: CN
Inventors: 郭浩; 施奕州; 梁佩
Original assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Current assignee: Zhejiang Wanliyang Intelligent Manufacturing Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-24
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to the field of workpiece hobbing, in particular to a clamp for hobbing a thin workpiece. The utility model provides a thin type work piece anchor clamps for gear hobbing processing, includes locating plate and lower locating plate, the locating plate is fixed in on the fixing base down, the fixing base internal fixation has the cone, the cone overcoat is equipped with the cover that rises, the cone downside is equipped with the lifter plate, the lifter plate links with the cover that rises, the cone is equipped with first mating holes, the lifter plate is equipped with the second mating holes, first mating holes and the cooperation of second mating holes department have the pull rod, the pull rod lower extreme links with second lift actuating mechanism, the part that the pull rod is located the lifter plate upside is equipped with the location arch of extending to the week outside, be equipped with first elastic component between protruding and the lifter plate in location, the lifter plate downside is equipped with the second elastic component that is used for supporting lifter plate and cover that rises. The utility model has the advantages of matching with the prior hobbing equipment for use and not causing deformation of thin workpieces during clamping.

Description

Clamp for hobbing thin workpiece

Technical Field

The utility model relates to the field of workpiece hobbing, in particular to a clamp for hobbing a thin workpiece.

Background

The conventional gear hobbing machines comprise clamps for clamping and positioning workpieces, each clamp comprises an upper positioning plate and a lower positioning plate, the upper positioning plate is linked with a hydraulic mechanism, the lower positioning plate is formed on a fixed seat, and the axial limiting of the workpieces is realized through the upper positioning plate and the lower positioning plate; the fixed seat is internally provided with a cone, an expansion sleeve and a pull rod, the pull rod is linked with another hydraulic mechanism, and the pull rod moves downwards to enable the cone or the expansion sleeve to move downwards, so that the cone and the expansion sleeve are in conical surface fit, the expansion sleeve is externally supported to be in contact with the inner wall of a workpiece, and the radial limiting of the workpiece is realized. However, the existing hydraulic mechanism has large driving force, so that the thin workpiece is easily stressed and deformed during clamping, and the phenomena of inner hole out-of-round and end face warping are caused.

Disclosure of Invention

The utility model aims to provide a clamp for hobbing a thin workpiece, which does not cause deformation of the thin workpiece during clamping.

In order to achieve the purpose, the utility model adopts the following technical scheme: a clamp for hobbing of a thin workpiece comprises a lower positioning plate and an upper positioning plate linked with a first lifting driving mechanism, the lower positioning plate is fixed on the fixed seat and is provided with a first abdicating groove which penetrates up and down, a cone is fixed in the fixed seat, the cone is sleeved with an expansion sleeve, the lower side of the cone is provided with a lifting plate, the lifting plate is fixed and linked with the lower end of the expansion sleeve, the cone is provided with a first matching hole which penetrates downwards, the lifting plate is provided with a second matching hole which penetrates upwards and downwards, the first matching hole and the second matching hole are matched with a pull rod, the lower end of the pull rod is linked with a second lifting driving mechanism, the part of the pull rod, which is positioned on the upper side of the lifting plate, is provided with a positioning bulge extending towards the outer circumferential side, a first elastic piece is arranged between the positioning bulge and the lifting plate, and a second elastic piece used for supporting the lifting plate and the expansion sleeve is arranged on the lower side of the lifting plate.

When the fixture is used, a workpiece is placed on the lower positioning plate, then the first lifting mechanism and the second lifting mechanism are started, the second lifting mechanism drives the pull rod to move downwards, so that the first elastic piece is compressed, along with the compression of the first elastic piece, the lifting plate located on the lower side of the first elastic piece can also move downwards, the lifting plate can drive the expansion sleeve to move downwards, the expansion sleeve expands with the conical surface of the cone, so that the inner wall of the thin workpiece is in contact positioning, and meanwhile, the upper positioning plate moves downwards to be in contact with the upper end face of the workpiece, so that the radial spacing and the axial spacing of the workpiece are finally realized, and the subsequent gear hobbing is facilitated. The first elastic piece is arranged to absorb partial downward pressure of the pull rod, so that the pressure on the expansion sleeve is reduced, the expansion sleeve is prevented from being expanded excessively, the workpiece is prevented from being deformed, and the thinner workpiece is prevented from being damaged. The first lifting driving mechanism and the second lifting driving mechanism are not required to be replaced, the gear hobbing machine can be used in cooperation with the existing gear hobbing machine, and production cost can be reduced.

Preferably, the pull rod is sleeved with a gasket, and the gasket is limited between the positioning bulge and the first elastic piece. Through setting up the gasket to adjust the ascending length of first elastic component vertical direction, thereby adjust the deformation volume of first elastic component, finally carry out the regulation of expansion sleeve stroke.

Preferably, the positioning protrusion is annular and surrounds the pull rod for one circle. The arrangement is used for increasing the area of the lower end face of the positioning protrusion, so that the use stability is improved.

Preferably, the first matching hole penetrates through the cone vertically, the upper end of the pull rod is provided with a limiting protrusion extending towards the outer circumferential side, the upper end of the cone is provided with an annular protrusion extending upwards, and the limiting protrusion is located above the annular protrusion all the time. When the expansion sleeve moves downwards and is expanded, the limiting bulge of the pull rod can move to the lowest side and is in contact with the annular bulge, and the pull rod is prevented from being in contact with the expansion sleeve by arranging the annular bulge extending upwards on the cone. Simultaneously, the cone is convenient to process and the first matching hole is convenient to arrange.

Preferably, a second abdicating groove for abdicating the expansion sleeve, the cone and the pull rod is formed in the middle of the lower end face of the upper positioning plate.

Preferably, a connecting part is connected between the lower end of the cone and the fixed seat, the connecting part is provided with at least three sliding holes which vertically penetrate through the two sections, the expansion sleeve comprises an expansion sleeve part which is matched with the cone to deform and a movable part which is connected to the lower end of the expansion sleeve part, the movable part is fixed to the upper end of the connecting column, and the lifting plate is fixed to the lower end of the connecting column. Wherein the connecting column can be made of bolts and the like. The lifting plate and the expansion sleeve are linked through the arrangement.

Preferably, a sliding sleeve is arranged in the sliding hole, and the connecting column is slidably matched in the sliding sleeve.

Preferably, the middle part of the lifting plate is provided with an extending part which extends upwards and has an annular cross section, the extending part extends into the first matching hole and is coaxially arranged with the second matching hole, and the lower end of the first elastic part is positioned in the extending part. The extending part is not only used for positioning the first elastic part, but also forms a sliding fit structure with the first fit hole of the cone.

Preferably, the fixing seat comprises a bottom located below the lifting plate, the bottom is provided with a third abdicating groove for the pull rod to pass through, and the upper end surface of the bottom is recessed to form a positioning groove for positioning the second elastic piece. Through setting up positioning groove so that fix a position second elastic component lower extreme to can also increase the space of lifter plate below, can place bigger, the longer second elastic component of axial length at the lifter plate downside.

Preferably, the lower positioning plate is detachably fixed on the fixing seat through a fastening bolt. If workpieces of different types need to be clamped, the lower positioning plate can be replaced, so that the clamp has universality.

The utility model has the advantages that the utility model can be used by matching with the existing gear hobbing equipment, and the deformation of a thin workpiece can not be caused during clamping.

Drawings

FIG. 1 is a schematic diagram of a structure of the present invention.

Detailed Description

The utility model is further described below with reference to the figures and specific embodiments.

As shown in figure 1, the utility model discloses a clamp for processing hobbing of a thin workpiece, which comprises an upper positioning plate 11 and a lower positioning plate 12 which are linked with a first lifting driving mechanism (not shown in the figure), wherein the lower positioning plate 12 is fixed on a fixed seat 13 and is provided with a first abdicating groove 121 which penetrates through the upper part and the lower part, a cone 2 is fixed in the fixed seat 13, the fixed seat 13 is fixed on a hobbing machine base through a connecting bolt 130, an expansion sleeve 3 is sleeved outside the cone 2, a lifting plate 4 is arranged at the lower side of the cone 2, the lifting plate 4 is fixed and linked with the lower end of the expansion sleeve 3, the cone 2 is provided with a first matching hole which penetrates through the upper part and the lower part, the lifting plate 4 is provided with a second matching hole which penetrates through the upper part and the lower part, a pull rod 5 is matched with the first matching hole and the second matching hole, the lower end of the pull rod 5 is linked with a second lifting driving mechanism (not shown in the figure), a positioning bulge 51 which extends towards the outer side is arranged at the part of the upper side of the pull rod 5, which is positioned on the upper side of the lifting plate 4, a first elastic member 6 is arranged between the positioning protrusion 51 and the lifting plate 4, and a second elastic member (not shown) for supporting the lifting plate 4 and the expansion sleeve 3 is arranged at the lower side of the lifting plate 1.

Wherein, the positioning protrusion 51 is ring-shaped and surrounds the pull rod 5 for a circle, and the lower positioning plate 12 is detachably fixed on the fixing base 13 through a fastening bolt 122. Wherein, the pull rod 5 is sleeved with a gasket 52, and the gasket 52 is limited between the positioning protrusion 51 and the first elastic element 6. Wherein, the middle part of the lower end surface of the upper positioning plate 11 is provided with a second abdicating groove 111 for abdicating the upper ends of the expansion sleeve 3, the cone 2 and the pull rod 5.

The middle part of the lifting plate 4 is provided with an extending part 42 which extends upwards and has an annular cross section, the extending part 42 extends into the first matching hole and is coaxially arranged with the second matching hole, and the lower end of the first elastic part 6 is positioned in the extending part 42. Wherein, the upper end of the pull rod 5 is provided with a limiting bulge 53 extending towards the outer side of the circumference, the upper end of the cone 2 is provided with an annular bulge 21 extending upwards, the limiting bulge 53 is always positioned above the annular bulge 21, and when the expansion sleeve 3 positions the workpiece 9, the upper end surface of the expansion sleeve 3 is positioned at the lower side of the upper end surface of the annular bulge 21.

Connecting portion 20 is connected with between 2 lower extremes of cone and fixing base 13, and fixing base 13 comprises last fixing base 131 and lower fixing base 132, and connecting portion 20 is fixed in between last fixing base 131 and lower fixing base 132. Connecting portion 20 has at least three two sections sliding holes that run through from top to bottom, and the cover that rises 3 includes the cover portion that rises with the deformation with the cooperation of cone 2 and connects the movable part 30 at the cover portion lower extreme that rises, and the relative cover portion that rises of movable part 30 outer wall outside the circumference outside extension is in order to be outer loop portion structure, and the outer loop portion structure of movable part 30 is located connecting portion 20 top and is fixed with spliced pole 40 upper end, and lifter plate 4 is fixed with spliced pole 40 lower extreme. Wherein, a sliding sleeve 41 is arranged in the sliding hole, and the connecting column 40 is arranged in the sliding sleeve 41 in a sliding way. The lower fixing base 132 includes a bottom 133 located below the lifting plate 4, the bottom 133 has a third recess 134 for the pull rod 5 to pass through, and an upper end surface of the bottom 133 is recessed to form a positioning groove 135 for positioning the second elastic member.

Claims

1. A clamp for hobbing of a thin workpiece is characterized by comprising a lower positioning plate and an upper positioning plate linked with a first lifting driving mechanism, the lower positioning plate is fixed on the fixed seat and is provided with a first abdicating groove which penetrates up and down, a cone is fixed in the fixed seat, the cone is sleeved with an expansion sleeve, the lower side of the cone is provided with a lifting plate, the lifting plate is fixed and linked with the lower end of the expansion sleeve, the cone is provided with a first matching hole which penetrates downwards, the lifting plate is provided with a second matching hole which penetrates upwards and downwards, the first matching hole and the second matching hole are matched with a pull rod, the lower end of the pull rod is linked with a second lifting driving mechanism, the part of the pull rod, which is positioned on the upper side of the lifting plate, is provided with a positioning bulge extending towards the outer circumferential side, a first elastic piece is arranged between the positioning bulge and the lifting plate, and a second elastic piece used for supporting the lifting plate and the expansion sleeve is arranged on the lower side of the lifting plate.

2. The jig for hobbing of thin workpieces as claimed in claim 1, wherein said tie bar is sleeved with a spacer, said spacer being confined between said positioning protrusion and said first elastic member.

3. The thin workpiece hobbing fixture of claim 1, wherein the locating projection is annular and surrounds the tie bar.

4. The jig for hobbing of thin workpiece according to claim 1, wherein the first fitting hole is vertically penetrated through the cone, the upper end of the pull rod has a limit protrusion extending outward in the circumferential direction, the upper end of the cone has an annular protrusion extending upward, and the limit protrusion is always located above the annular protrusion.

5. The clamp for hobbing of a thin workpiece according to claim 4, wherein a second abdicating groove for abdicating the expansion sleeve, the cone and the pull rod is formed in the middle of the lower end surface of the upper positioning plate.

6. The clamp for hobbing of thin workpiece according to claim 1, wherein a connecting part is connected between the lower end of the cone and the fixing base, the connecting part has at least three sliding holes passing through two sections up and down, the expanding sleeve includes an expanding sleeve part which is deformed by being engaged with the cone and a movable part connected to the lower end of the expanding sleeve part, the movable part is fixed to the upper end of the connecting column, and the lifting plate is fixed to the lower end of the connecting column.

7. The clamp for hobbing of a thin workpiece according to claim 6, wherein a sliding sleeve is provided in the sliding hole, and the connecting column is slidably fitted in the sliding sleeve.

8. The jig for hobbing of thin workpiece according to claim 1, wherein the middle part of the lifting plate has an extended part extending upward and having an annular cross section, the extended part extends into the first fitting hole and is coaxially disposed with the second fitting hole, and the lower end of the first elastic member is located in the extended part.

9. The clamp for hobbing of a thin workpiece according to claim 1, wherein the fixing seat comprises a bottom portion located below the lifting plate, the bottom portion has a third abdicating groove for the pull rod to pass through, and an upper end surface of the bottom portion is recessed to form a positioning groove for positioning the second elastic member.

10. The thin workpiece hobbing fixture as claimed in claim 1, wherein the lower positioning plate is detachably fixed to the fixing base by a fastening bolt.