CN2279732Y - Expanding clamp type external stator-core - Google Patents

Abstract

The utility model discloses an expanding clamp type external stator core which is used for car generators. The bottom of teeth is provided with a dovetail groove, expanding clamps of thin materials can pass through the dovetail groove, the expanding clamp is provided with a certain preextending radian, the punch strip is shaped by that the punch strip is punched into strip materials, and a single strip, or two strips, or three strips are wound. The punch strip can be shaped in one step. The utility model has the advantages of simple processing mould, low cost, and stable and reliable product quality.

Description

A kind of external stator core of the buckle-type that rises

The utility model relates to a kind of improvement of external stator core for automobile generator.

So far, the production method of external stator core for automobile generator mainly contains following three kinds: 1, use rivet, this is a kind of common method, when punching was one-shot forming if will take this form, its processing mold can be quite complicated, and difficulty is very big, and mould also damages the life-span weak point easily; If adopt post forming to process, though can prolong die life, the quality of its product descends.2, argon arc welding, die needed comparatively simple, but the argon gas costliness, the cost height, and argon arc welding has infringement, troublesome poeration to people's health.3, whole coiling and molding, the processing unit (plant) complex structure of this moulding, the cumulative limit of punching can have influence on the quality of product.

Task of the present utility model is the external stator core that a kind of new structure will be provided, and this punching can disposal molding, and its processing mold is simple, and production cost is cheap, and the quality of product improves.

Task of the present utility model is finished in such a way, the tooth bottom of this external stator core has dovetail groove, and this groove has suitable drift angle, and its radial dimension is less, punching is one-time formed, subpunch becomes billot, is wound into monolithic, biplate or three again, to reduce accumulated error, this processing mold is fairly simple, pass the button card that rises of dovetail groove, certain radian that rises is in advance arranged, the quality of product is increased.

Below in conjunction with accompanying drawing the utility model is further elaborated.

Fig. 1 is an external stator core punching cutaway view of the present utility model.

From figure, can learn, (1) locates to have a dovetail groove (2) at the bottom of the tooth of this external stator core for automobile generator, radial dimension is less, there is the dovetail groove (2) of certain drift angle that the button card that rises is passed again, the button card that rises is selected thin type for use, and make with material that core material hardness adapts, the button card has been processed into the radian that rises in advance owing to rise, elder generation's reinforcing is risen in advance when laminating, make lamination uniform, but this punching subpunch becomes billot, is wound into monolithic again, biplate or three shaping punching, figure is the pattern that monolithic is reeled, joining place (3) just is the two ends of billot, this punching can be one-time formed, and its processing mold is also fairly simple, and the quality of product correspondingly improves.

Claims (1)

1, a kind of external stator core of the buckle-type that rises, it is characterized in that: (1) locates to have dovetail groove (2) at the bottom of the tooth of this external stator core, and the radial dimension of this dovetail groove (2) is less, and has suitable drift angle, the button card that rises of thin material can therefrom pass through, and the button jig that rises has certain radian that rises in advance.

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