CN219443728U

CN219443728U - Gear expansion sleeve

Info

Publication number: CN219443728U
Application number: CN202320386904.7U
Authority: CN
Inventors: 闵德宇
Original assignee: Chongqing Qichi Gear Research Institute Co ltd
Current assignee: Chongqing Qichi Gear Research Institute Co ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-08-01
Anticipated expiration: 2033-03-03

Abstract

The utility model relates to the technical field of gear machining and discloses a gear expansion sleeve which comprises an expansion sleeve body, wherein the expansion sleeve body comprises a first deformation part and a second deformation part which are sequentially communicated, the diameter of the first deformation part is smaller than that of the second deformation part, and a first expansion sleeve groove is formed in the expansion sleeve body. The technical scheme of the utility model can accurately position the gear, can improve the precision of gear grinding processing, and has the advantages of simple structure, convenient manufacture and simple operation.

Description

Gear expansion sleeve

Technical Field

The utility model relates to the technical field of gear machining, in particular to a gear expansion sleeve.

Background

In the gear grinding process of the disc type gears, in order to ensure the accuracy of the gear grinding process, a gear inner hole is generally used as a positioning reference, and a taper mandrel is matched with an expansion sleeve to position the gears. For a common straight hole gear, the expansion sleeve 19 shown in fig. 1 is usually adopted to position the straight hole gear, however, for the gear 1 shown in fig. 2, a first stepped hole 2, a second stepped hole 3, a third stepped hole 4 and a fourth stepped hole 5 which are sequentially communicated are formed in the gear 1, if the expansion sleeve 19 shown in fig. 1 is adopted to position the gear 1, because the expansion sleeve 19 in fig. 1 is not matched with the inner hole structure of the gear 1, when the expansion sleeve 19 in fig. 1 is adopted to be matched with the taper mandrel 13 to position the gear 1, positioning inaccuracy exists, and the gear grinding machining precision of the gear 1 is affected.

Disclosure of Invention

The utility model aims to provide a gear expansion sleeve which is used for accurately positioning a gear and improving the machining precision of grinding teeth.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a gear expansion shell, includes the expansion shell body, and the expansion shell body is equipped with first expansion shell groove including the first deformation portion and the second deformation portion of intercommunication in proper order, and the diameter of first deformation portion is less than the diameter of second deformation portion on the expansion shell body.

The beneficial effect of this scheme is: when the gear is subjected to gear grinding, the gear is positioned through the expansion sleeve body, specifically, the expansion sleeve body is sleeved on the taper mandrel, the gear is sleeved on the expansion sleeve body, the positions of the first stepped hole and the second stepped hole correspond to the first deformation part, the positions of the third stepped hole and the fourth stepped hole correspond to the second deformation part, the gear is expanded and positioned through the expansion sleeve body and the taper mandrel, and finally, the gear is subjected to gear grinding by means of a machine tool.

Because the shape of the expanding sleeve body is matched with the structure of the inner hole of the gear, the first stepped hole can be accurately positioned through the first deformation part, the fourth stepped hole can be accurately positioned through the second deformation part, and the accuracy of gear grinding processing is improved through positioning the two ends of the gear.

Because the expansion sleeve body comprises first deformation portion and second deformation portion, simple structure is convenient for make, simultaneously, also has easy operation's advantage.

Further, the expansion sleeve further comprises a first positioning piece and a second positioning piece which are used for positioning the expansion sleeve body, and the first positioning piece and the second positioning piece are detachably arranged on the taper mandrel.

The beneficial effect of this scheme is: because the setting of first setting element and second setting element can carry out axial positioning to the cover body that expands, when carrying out the gear grinding to the gear, prevents that the cover body from axially moving on the tapering mandrel, influences the precision of gear grinding processing.

Further, the expansion sleeve body further comprises an annular limiting part, and the annular limiting part is communicated with the second deformation part.

The beneficial effect of this scheme is: if the annular limiting part is not arranged on the expansion sleeve body, in order to facilitate the axial positioning of the first positioning part and the second positioning part on the expansion sleeve body, the axial length of the expansion sleeve body is necessarily larger than that of the gear, when the gear is subjected to gear grinding, the gear is easy to axially move on the expansion sleeve body, the accuracy of gear grinding is affected, and due to the arrangement of the annular limiting part, the gear can be axially limited, so that the problem can be avoided.

Further, a plurality of second expansion sleeve grooves which are mutually communicated are formed in the circumferential directions of the second deformation part and the annular limiting part.

The beneficial effect of this scheme is: because the circumference of second deformation portion and annular spacing portion all is opened and is had a plurality of second expansion shell grooves of intercommunication each other, when using expansion shell body and tapering mandrel cooperation to expand tightly the location to the gear for the expansion shell body can be along radial even deformation, and reduce the axiality error of expansion shell body, improved the precision of grinding teeth processing.

Further, the axial length of the first deformation portion is greater than the sum of the axial lengths of the first stepped hole and the second stepped hole.

The beneficial effect of this scheme is: if the axial length of the first deformation part is smaller than the sum of the axial lengths of the first stepped hole and the second stepped hole, when the second positioning piece is used for axially positioning the expansion sleeve body, the second positioning piece cannot prop against the first deformation part, the first deformation part cannot be positioned, when the gear is subjected to gear grinding processing, the accuracy of the gear grinding processing is affected, and the axial length of the first deformation part is larger than the sum of the axial lengths of the first stepped hole and the second stepped hole, so that the problem can be avoided.

Further, the upper end of the second deformation portion is rounded.

The beneficial effect of this scheme is: in the process of expanding the gear by the expanding sleeve body, the second deformation part is prevented from scratching the inner hole of the gear, and the quality of the gear is affected.

Further, an annular groove is arranged on the annular limiting part.

The beneficial effect of this scheme is: when the gear is positioned, one side of the gear, which is close to the fourth stepped hole, is propped against the annular groove, the gear is limited, and when the gear is subjected to gear grinding, the gear can be prevented from moving axially, so that the gear grinding precision is improved.

Further, the diameter of the second positioning member is smaller than the diameter of the first deforming portion.

The beneficial effect of this scheme is: because the diameter of the second locating piece is smaller than that of the first deformation part, after the first locating piece and the second locating piece are used for locating the expansion sleeve body, the first locating piece does not need to be disassembled when the gears of the same model are located next time, the gears can be directly sleeved on the expansion sleeve body, and the gear locating efficiency is improved.

Further, the first locating piece and the second locating piece are both locating nuts, the taper mandrel comprises a first horizontal portion, a taper portion and a second horizontal portion which are connected in sequence, the first locating piece is in threaded connection with the first horizontal portion, and the second horizontal portion is in threaded connection with the second locating piece.

The beneficial effect of this scheme is: the two ends of the expansion sleeve body are axially positioned through the positioning nut, so that the expansion sleeve body is prevented from moving along the axial direction of the taper mandrel when the gear is subjected to gear grinding, and the accuracy of gear grinding is prevented from being influenced; because the first locating piece and the second locating piece are in threaded connection with the taper mandrel, the positions of the first locating piece and the second locating piece are convenient to adjust, and the positioning precision of the expansion sleeve body is improved.

Drawings

FIG. 1 is a three-dimensional view of a prior art expansion shell;

FIG. 2 is a schematic diagram of a conventional gear;

FIG. 3 is a front three-dimensional view of a gear expansion sleeve of the present utility model;

FIG. 4 is a bottom three-dimensional view of a gear expansion sleeve of the present utility model;

fig. 5 is a schematic structural diagram of the expansion sleeve body and the taper mandrel of the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the gear 1, the first step hole 2, the second step hole 3, the third step hole 4, the fourth step hole 5, the expansion sleeve body 6, the first deformation part 7, the second deformation part 8, the annular limiting part 9, the annular groove 10, the first expansion sleeve groove 11, the second expansion sleeve groove 12, the taper mandrel 13, the first horizontal part 14, the taper part 15, the second horizontal part 16, the first positioning piece 17, the second positioning piece 18 and the expansion sleeve 19.

Examples

A gear expansion sleeve substantially as shown in figures 1-5.

As shown in fig. 2, a conventional gear 1 is provided with a first stepped hole 2, a second stepped hole 3, a third stepped hole 4 and a fourth stepped hole 5 which are sequentially communicated.

The gear expansion sleeve shown in fig. 3 comprises an expansion sleeve body 6, a first positioning piece 17 and a second positioning piece 18, wherein the first positioning piece 17 and the second positioning piece 18 are used for positioning the expansion sleeve body 6, the expansion sleeve body 6 comprises a first deformation part 7, a second deformation part 8 and an annular limiting part 9 which are sequentially communicated, the first deformation part 7, the second deformation part 8 and the annular limiting part 9 are integrally formed and processed, the diameter of the expansion sleeve body 6 is sequentially increased from the first deformation part 7 to the annular limiting part 9, the upper end of the second deformation part 8 is in rounding transition, and an annular groove 10 is formed in the upper end of the annular limiting part 9; the inner hole of the expansion sleeve body 6 is conical, and the aperture of the inner hole gradually increases from the first deformation part 7 to the annular limiting part 9; as shown in fig. 4, the expansion sleeve body 6 is provided with a first expansion sleeve groove 11, the left side and the right side of the front side of the expansion sleeve body 6 are separated by the first expansion sleeve groove 11, the circumferences of the second deformation part 8 and the annular limiting part 9 are provided with five second expansion sleeve grooves 12 which are mutually communicated, the first deformation part 7 is sleeved on the first stepped hole 2 and the second stepped hole 3, the axial length of the first deformation part 7 is greater than the sum of the axial lengths of the first stepped hole 2 and the second stepped hole 3, and the second deformation part 8 is sleeved on the third stepped hole 4 and the fourth stepped hole 5.

As shown in fig. 5, the existing taper mandrel 13 includes a first horizontal portion 14, a tapered portion 15 and a second horizontal portion 16 which are sequentially connected, a first positioning member 17 is detachably disposed on the first horizontal portion 14, a second positioning member 18 is detachably disposed on the second horizontal portion 16, the first positioning member 17 is located on the left side of the second positioning member 18, the diameter of the first positioning member 17 is larger than that of the second positioning member 18, the expansion sleeve body 6 is sleeved on the tapered portion 15, the diameter of the second positioning member 18 is smaller than that of the first deformation portion 7, in this embodiment, the first positioning member 17 and the second positioning member 18 are positioning nuts, and the first positioning member 17 and the second positioning member 18 are in threaded connection with the taper mandrel 13.

The specific implementation process is as follows:

in the gear grinding process of the gear 1 in fig. 2, it is necessary to position the gear 1 first, and to position the gear 1: the position of the first positioning piece 17 is adjusted, the first positioning piece 17 is far away from the conical part 15, the second positioning piece 18 is detached from the conical mandrel 13, the expansion sleeve body 6 is sleeved on the conical part 15, the gear 1 is sleeved on the expansion sleeve body 6, the positions of the first stepped hole 2 and the second stepped hole 3 correspond to the first deformation part 7, the positions of the third stepped hole 4 and the fourth stepped hole 5 correspond to the second deformation part 8, the gear 1 is subjected to expansion positioning through the matching of the expansion sleeve body 6 and the conical mandrel, after positioning is completed, the position of the first positioning piece 17 is adjusted, the first positioning piece 17 is propped against the annular limiting part 9, the second positioning piece 18 is installed on the second horizontal part 16, the second positioning piece 18 is propped against the first deformation part 7, and the gear 1 is subjected to gear grinding machining by means of a machine tool.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a gear expands cover which characterized in that: the expansion sleeve comprises an expansion sleeve body, wherein the expansion sleeve body comprises a first deformation part and a second deformation part which are communicated in sequence, the diameter of the first deformation part is smaller than that of the second deformation part, and a first expansion sleeve groove is formed in the expansion sleeve body; the expansion sleeve comprises an expansion sleeve body, and is characterized by further comprising a first positioning piece and a second positioning piece which are used for positioning the expansion sleeve body, wherein the first positioning piece and the second positioning piece are detachably arranged on the taper mandrel.

2. The gear expansion sleeve of claim 1, wherein: the expansion sleeve body further comprises an annular limiting part, and the annular limiting part is communicated with the second deformation part.

3. A gear expansion sleeve according to claim 2, wherein: and a plurality of second expansion sleeve grooves which are mutually communicated are formed in the circumferential directions of the second deformation part and the annular limiting part.

4. A gear expansion sleeve according to claim 3, wherein: the axial length of the first deformation part is greater than the sum of the axial lengths of the first stepped hole and the second stepped hole.

5. The gear expansion sleeve of claim 4, wherein: the upper end of the second deformation part is rounded and transited.

6. The gear expansion sleeve of claim 5, wherein: the annular limiting part is provided with an annular groove.

7. The gear expansion sleeve of claim 6, wherein: the diameter of the second positioning piece is smaller than that of the first deformation part.

8. The gear expansion sleeve of claim 7, wherein: the first locating piece and the second locating piece are both locating nuts, the taper mandrel comprises a first horizontal portion, a taper portion and a second horizontal portion which are connected in sequence, the first locating piece is in threaded connection with the first horizontal portion, and the second horizontal portion is in threaded connection with the second locating piece.