CN213531109U

CN213531109U - Short shaft gear hobbing clamp holder

Info

Publication number: CN213531109U
Application number: CN202022568555.XU
Authority: CN
Inventors: 梅亚飞; 石凯; 梅永兵; 梅朋; 陈赟; 梅和奎
Original assignee: Hangzhou Yafei Machinery Manufacturing Co Ltd
Current assignee: Hangzhou Yafei Machinery Manufacturing Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-25
Anticipated expiration: 2030-11-09

Abstract

The utility model relates to the technical field of tool fixtures, in particular to a short shaft hobbing clamp holder, which comprises a clamping sleeve, a tightening taper sleeve and a nut; the rear end of the jacket is a handle part, and the front end of the jacket is provided with a stepped hole along the axis direction; a circle of bulges are integrally formed on the circumferential outer wall at the front end of the jacket, and an outer conical surface with a large front part and a small back part is formed on the circumferential outer wall of each bulge; the front end of the jacket is also provided with a plurality of shrinkage joints which are uniformly distributed in the circumferential direction, each shrinkage joint extends backwards from the front end surface of the jacket to the rear part of the stepped hole along the axial direction, and penetrates through the wall of the stepped hole from the jacket and the outer wall of the bulge along the radial direction; the circumferential outer wall of the jacket is also provided with a section of external thread; the through inner taper hole of the tightening taper sleeve is matched on the outer conical surface, the nut is matched on the outer thread, and the front end of the nut abuts against the rear end face of the tightening taper sleeve. The utility model discloses can stably the centre gripping minor axis when the gear hobbing, can also the centre gripping step shaft gear hobbing, simple structure, convenient to use.

Description

Short shaft gear hobbing clamp holder

Technical Field

The utility model belongs to the technical field of frock clamp technique and specifically relates to a minor axis gear hobbing holder.

Background

When the gear is in gear hobbing work, one end of the gear needs to be clamped and installed on a machine tool spindle by using a clamp and is driven to rotate by the spindle, the other end of the gear is propped by a tip or is clamped by using the clamp, the tip or the clamp rotates passively, and whether the clamp is stable or not directly influences the gear machining quality and the machining efficiency. At present, some shaft gear workpieces with short axial sizes are generally processed by hobbing, a clamp is required to be prevented from interfering with a hob and is simple and easy to use, and a short-shaft hobbing clamp is required to be designed.

Disclosure of Invention

The utility model aims at overcoming not enough among the above-mentioned background art, provide a minor axis hobbing holder, can stably centre gripping minor axis when the gear hobbing, can also the centre gripping step shaft carry out the gear hobbing, have simple structure simultaneously, convenient to use's technical characterstic.

The technical purpose of the utility model is realized like this: the short shaft hobbing clamp comprises a clamping sleeve, a tightening taper sleeve and a nut; the rear end of the jacket is a handle part, the front end of the jacket is provided with a stepped hole along the axis direction, the aperture of the first-stage stepped hole is larger than that of the second-stage stepped hole, and the length of the first-stage stepped hole in the axis direction is smaller than that of the second-stage stepped hole; a circle of bulges are integrally formed on the circumferential outer wall at the front end of the jacket, the front end face of each bulge is flush with the front end face of the jacket, an outer conical surface with a large front part and a small back part is formed on the circumferential outer wall of each bulge, a certain distance is kept between the foremost end of each outer conical surface and the front end face of each bulge, and the rearmost end of each outer conical surface extends to the rear end face of each bulge and is larger than the outer diameter of the jacket; the front end of the jacket is also provided with a plurality of shrinkage joints which are uniformly distributed in the circumferential direction, each shrinkage joint extends backwards from the front end surface of the jacket to the rear part of the secondary stepped hole along the axial direction, and penetrates through the wall of the stepped hole from the jacket and the outer wall of the bulge along the radial direction; the circumferential outer wall of the jacket is also provided with a section of external thread, and the external thread extends backwards for a distance from the rear end surface of the bulge; the tightening taper sleeve is matched on the outer conical surface through an inner conical hole formed in the front of the inner hole, the nut is matched on the outer thread, and the front end of the nut abuts against the rear end face of the tightening taper sleeve.

Preferably, the rear end of the contraction joint is provided with a circular through hole, and the diameter of the circular through hole is larger than the width of the contraction joint.

Compared with the prior art, the beneficial effects of the utility model are that: the structure of the utility model is compact, and by arranging the stepped holes, common short shaft workpieces can be clamped through the first-stage stepped holes, and stepped shaft workpieces can also be clamped through the first-stage stepped holes and the second-stage stepped holes; a distance is reserved between the convex part and the outer conical surface, so that the phenomenon that the tightening taper sleeve extends out of the front end face of the clamping sleeve to interfere with the operation of the hob when moving forwards is avoided, the tightening taper sleeve has a section of length on the rear side of the inner taper hole, the tightening taper sleeve can be extruded forwards as far as possible when the nut is screwed, and the clamping sleeve can stably and reliably clamp a workpiece.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic sectional view taken along the line a-a in fig. 1.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples, but the present invention is not limited to the following examples.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "primary" and "secondary" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the short shaft hobbing clamp comprises a clamping sleeve 1, a tightening taper sleeve 2 and a nut 3.

The rear end of the jacket 1 is a longer handle part 1.1 which is clamped by a three-jaw chuck during work. The front end of the jacket 1 is provided with a stepped hole along the axis direction, the first-stage stepped hole 4.1 is positioned at the front side of the second-stage stepped hole 4.2, the aperture of the first-stage stepped hole is larger than that of the second-stage stepped hole 4.2, and the length of the first-stage stepped hole 4.1 in the axis direction is smaller than that of the second-stage stepped hole 4.2. The circumference outer wall integrated into one piece who presss from both sides the cover 1 front end has the protruding 1.2 of round, and the preceding terminal surface of protruding 1.2 is parallel and level with the preceding terminal surface that presss from both sides the cover 1, and protruding 1.2 circumference outer wall system has big-end-back outer conical surface 8, and outer conical surface 8's foremost end keeps a section distance with protruding 1.2's preceding terminal surface, and the rearmost end of outer conical surface 8 extends to the rear end face of protruding 1.2 and is greater than the external diameter that presss from both sides the cover 1. The front end of the jacket 1 is also provided with a plurality of shrinkage joints 5 which are uniformly distributed in the circumferential direction, each shrinkage joint 5 extends backwards to the rear part of the secondary stepped hole 4.2 from the front end face of the jacket 1 along the axis direction, and radially penetrates through the wall of the stepped hole from the jacket 1 and the outer wall of the bulge 1.2, the jacket part between the shrinkage joint 5 and the shrinkage joint 5 has elasticity, and can be tightened inwards when the outer conical surface 8 is extruded to clamp shaft workpieces. In order to enable the jacket 1 to shrink better and improve elasticity, a circular through hole 7 is formed at the rear end of the shrinkage joint 5, and the diameter of the circular through hole 7 is larger than the width of the shrinkage joint 5.

The outer circumferential wall of the jacket 1 is also provided with an external thread 6, and the external thread 6 extends backwards from the rear end face of the bulge 1.2 for a distance to reach the jacket handle 1.1. The tightening taper sleeve 2 is matched on the external conical surface 8 through an internal taper hole 9 arranged at the front part of an inner hole 10 of the tightening taper sleeve, the nut 3 is matched on the external thread 6, and the front end of the nut 3 abuts against the rear end face of the tightening taper sleeve 2.

The utility model discloses a theory of operation is: the stalk portion 1.1 that presss from both sides cover 1 is by the main epaxial three-jaw chuck centre gripping of lathe, minor axis class work piece is according to the difference of size, and one end is by perhaps second grade shoulder hole 4.2 centre gripping in the one-level shoulder hole 4.1, and step shaft class work piece one end is by second grade shoulder hole 4.2 centre gripping alone or with one-level shoulder hole 4.1 centre gripping together, the other end withstands or equally by top the utility model provides a holder centre gripping makes it produce axial displacement through screwing nut 3, and nut 3 pushes away to push forward and tightens up taper sleeve 2, and the outer conical surface 8 of interior taper hole 9 extrusion forces the front end that presss from both sides cover 1 to tighten up to lock the work piece at the front end that presss from both sides cover.

The above description is only a preferred embodiment of the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Minor axis gear hobbing holder, its characterized in that: comprises a clamping sleeve (1), a tightening taper sleeve (2) and a nut (3); the rear end of the jacket (1) is a handle part (1.1), the front end of the jacket (1) is provided with a stepped hole along the axis direction, the aperture of the first-stage stepped hole (4.1) is larger than that of the second-stage stepped hole (4.2), and the length in the axis direction is smaller than that of the second-stage stepped hole (4.2); a circle of bulges (1.2) are integrally formed on the circumferential outer wall of the front end of the jacket (1), the front end face of each bulge (1.2) is flush with the front end face of the jacket (1), an outer conical surface (8) with a large front end and a small rear end is formed on the circumferential outer wall of each bulge (1.2), a distance is kept between the foremost end of each outer conical surface (8) and the front end face of each bulge (1.2), the rearmost end of each outer conical surface (8) extends to the rear end face of each bulge (1.2), and the diameter of the rearmost end of each outer conical surface (8) is larger than the outer diameter of the jacket (1); the front end of the jacket (1) is also provided with a plurality of shrinkage joints (5) which are uniformly distributed in the circumferential direction, each shrinkage joint (5) extends backwards to the rear part of the secondary stepped hole (4.2) from the front end surface of the jacket (1) along the axis direction, and radially penetrates through the wall of the stepped hole from the outer walls of the jacket (1) and the protrusion (1.2); the circumferential outer wall of the jacket (1) is also provided with a section of external thread (6), and the external thread (6) extends backwards for a certain distance from the rear end surface of the bulge (1.2); the tightening taper sleeve (2) is matched on the outer conical surface (8) through an inner conical hole (9) formed in the front of an inner hole (10) of the tightening taper sleeve, the nut (3) is matched on the outer thread (6), and the front end of the nut (3) abuts against the rear end face of the tightening taper sleeve (2).

2. A stud hobbing holder as claimed in claim 1, characterised in that: the rear end of the shrinkage joint (5) is provided with a circular through hole (7), and the diameter of the circular through hole (7) is larger than the width of the shrinkage joint (5).