CN203883291U - Cold-forged copper housing of commutator - Google Patents
Cold-forged copper housing of commutator Download PDFInfo
- Publication number
- CN203883291U CN203883291U CN201420273706.0U CN201420273706U CN203883291U CN 203883291 U CN203883291 U CN 203883291U CN 201420273706 U CN201420273706 U CN 201420273706U CN 203883291 U CN203883291 U CN 203883291U
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- CN
- China
- Prior art keywords
- commutator
- copper shell
- copper
- cold
- copper housing
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Abstract
The utility model discloses a cold-forged copper housing of a commutator, which is characterized in that: the copper housing is formed by a copper rod through cold forging; the upper end of the copper housing is a cylinder with a larger diameter, and the lower end is a cylinder with a smaller diameter; a plurality of foreign-shaped projections with a same shape are uniformly distributed on the inner hole of the copper housing in a circumferential direction; a chamber is formed between two random foreign-shaped projections; the width of each chamber gradually increases in a direction from the bottom part of the foreign-shaped projection to the top; after the width of each chamber quickly increases at the part which is next to the top of the foreign-shaped projection, a reducing opening is formed at the top position of the foreign-shaped projection; in the height direction of the copper housing, the inner hole of the copper housing is provided with annular grooves which are machined by a lathe tool through hook cutting; the upper-side groove wall of each annular groove is vertical to the groove bottom; and an included angle between the lower-side groove wall and the groove bottom is 30-45 DEG. The cold-forged copper housing of the commutator has functions of: greatly simplifying production process of the commutator, improving production efficiency, and simultaneously ensuring high mechanical strength and high overspeed performance of a manufactured commutator product. Furthermore the cold-forged copper housing is suitable for groove type commutators.
Description
Technical field
The utility model relates to a kind of commutator product, is specifically related to a kind of cold forging copper shell of commutator.
background technology
At present, the basic manufacture method of commutator is first punching copper segment, then through loaded down with trivial details screening operation, make commutator finally by injection moulding operation, and production efficiency is very low.For solving punching and the inefficient problem of screening of copper segment, many times adopt at present the overall commutator segment structure that rolls copper hull shape formula, there is himself advantage although roll copper shell, but copper plate thickness is seriously limited, only applicable Hooked reverser and can not fine applicable end commutator and tank commutator; Only a few also has employing cold forging copper shell structure at present, cold forging copper shell will be combined with commutator matrix firmly, on cold forging copper shell, must produce some crotches by diel Ji road stamping procedure, only have the existence of these crotches just can make cold forging copper shell in the time of injection moulding and commutator basis material strong bonded, therefore cold forging copper shell still have that technological process is many, made commutator mechanical strength is not high, the not strong defect of hypervelocity performance, and, although cold forging copper shell can adapt to end commutator preferably, can not fine applicable tank commutator.
Summary of the invention
In view of the deficiencies in the prior art, the technical problems to be solved in the utility model is to be to provide one can greatly simplify the commutator technological process of production, enhance productivity, the mechanical strength of the commutator product that guarantee completes simultaneously and hypervelocity performance are also suitable for the commutator cold forging copper shell of tank commutator.
The utility model takes following technical scheme to complete:
Commutator cold forging copper shell, it is characterized in that: by copper rod cold-forge forming, the upper end of copper shell is larger-diameter cylindrical, lower end is less cylindrical of diameter, the endoporus of copper shell is laid with the abnormity projection of multiple same shapes in a circumferential direction, between adjacent special-shaped projection, form cavity, the width of cavity slowly broadens toward top-direction from the root of abnormity projection, after broadening fast, forms reducing again at the tip position of abnormity projection in the time of the top near abnormity projection; In the short transverse of copper shell, the endoporus of copper shell is provided with lathe tool hook and cuts the annular groove processing, and upside cell wall and the bottom land of annular groove are rectangular, and downside cell wall and bottom land are 30-45 angle.
Adopt after technique scheme, first realize overall commutator segment structure, i.e. all copper segments moulding on a cold forging copper shell part, copper shell has also had the profile after the combination of tank commutator copper sheet simultaneously, in addition, by the design of special-shaped projection and cavity, make copper shell in the time of injection moulding and commutator basis material strong bonded, that cuts out with lathe tool hook has also greatly strengthened the strong bonded of copper shell and commutator basis material with hypotenuse annular groove simultaneously, thus, the utility model not only can be simplified the commutator technological process of production greatly, enhance productivity, and ensure mechanical strength and the hypervelocity performance of the commutator product completing simultaneously and be suitable for tank commutator.
As preferably, the top of abnormity projection has swallowtail shape, in copper shell short transverse, the top dovetail of abnormity projection when near copper shell upper surface less thick until the dovetail inclined-plane of dovetail disappear.Adopt after technique scheme, the cavity entrance size of copper shell upper surface obtains strengthening and slowly transition downwards, such design is beneficial in the time of injection moulding commutator basis material and can enters into better cavity inside and fill up cavity, increase the density of cavity endobasal-body material, copper shell is combined securely with commutator basis material, and ensure bond quality and intensity, ensure mechanical strength and the hypervelocity performance of the commutator product completing.
Brief description of the drawings
Fig. 1 is the directional diagram of overlooking of the present utility model;
Fig. 2 is the A-A view of Fig. 1,
Fig. 3 is the rear view of Fig. 1.
Embodiment
As shown in the figure, commutator cold forging copper shell of the present utility model, by copper rod cold-forge forming, the upper end of copper shell is larger-diameter cylindrical 5, lower end be diameter less cylindrical 6, so just make copper shell there is the profile after the combination of tank commutator copper sheet, the endoporus of copper shell is laid with the abnormity projection 1 of 25 same shapes in a circumferential direction, between adjacent abnormity projection 1, form cavity 3, the width of cavity 3 slowly broaden from the root of abnormity projection 1 toward top-direction (from 0.5mm-1mm), in the time of the top 2 near abnormity projection, broadening fast and forming reducing 4(reducing width in 2 positions, top of abnormity projection again after (for 2mm) is 1mm), in the short transverse of copper shell, the endoporus of copper shell is provided with cuts the annular groove 7 processing with lathe tool hook, upside cell wall and the bottom land of annular groove 7 are rectangular, downside cell wall and bottom land are 30-45 angle, the top 2 of abnormity projection has swallowtail shape, in copper shell short transverse, top 2 dovetails of abnormity projection when near copper shell upper surface less thick until the dovetail inclined-plane of dovetail disappears (within the scope of the M segment distance shown in Fig. 2).
Claims (2)
1. commutator cold forging copper shell, it is characterized in that: by copper rod cold-forge forming, the upper end of copper shell is larger-diameter cylindrical, lower end is less cylindrical of diameter, the endoporus of copper shell is laid with the abnormity projection of multiple same shapes in a circumferential direction, between adjacent special-shaped projection, form cavity, the width of cavity slowly broadens toward top-direction from the root of abnormity projection, after broadening fast, forms reducing again at the tip position of abnormity projection in the time of the top near abnormity projection; In the short transverse of copper shell, the endoporus of copper shell is provided with lathe tool hook and cuts the annular groove processing, and upside cell wall and the bottom land of annular groove are rectangular, and downside cell wall and bottom land are 30-45 degree angle.
2. commutator cold forging copper shell as claimed in claim 1, is characterized in that: the top of abnormity projection has swallowtail shape, in copper shell short transverse, the top dovetail of abnormity projection when near copper shell upper surface less thick until the dovetail inclined-plane of dovetail disappear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273706.0U CN203883291U (en) | 2014-05-26 | 2014-05-26 | Cold-forged copper housing of commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420273706.0U CN203883291U (en) | 2014-05-26 | 2014-05-26 | Cold-forged copper housing of commutator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883291U true CN203883291U (en) | 2014-10-15 |
Family
ID=51683759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420273706.0U Expired - Fee Related CN203883291U (en) | 2014-05-26 | 2014-05-26 | Cold-forged copper housing of commutator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203883291U (en) |
-
2014
- 2014-05-26 CN CN201420273706.0U patent/CN203883291U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20150526 |
|
| EXPY | Termination of patent right or utility model |