CN202889129U - Expanding tire - Google Patents

Abstract

The utility model discloses an expanding tire. The expanding tire comprises a shaft, wherein expanding cores are sleeved at two ends of the shaft, expanding jackets are sleeved outside the expanding cores, and the expanding cores and the expanding sleeves at the two ends of the shaft are symmetrical with respect to the shaft center. By using the expanding tire disclosed by the utility model, a motor stator with rather long core dimension can be mounted by one time, the co-axiality and co-accuracy of rabbets at two ends of the motor stator is guaranteed, and the production quality is improved.

Description

A kind of expander

Technical field

The utility model relates to a kind of expander, refers more particularly to a kind of expander for motor stator core inner ring location.

Background technology

Motor stator core is one of important component of motor, the quality of its quality directly affects the quality of overall performance, existing normal operation expander press-fits the iron core inner circle, make its cylindricity reach certain standard, but run into the long situation of core length, just to repeatedly press-fit it, so just can not guarantee the axiality of motor stator two ends seam, thereby affect the quality of motor.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of expander that can disposablely press-fit the long motor stator of iron core.

In order to solve the problems of the technologies described above, the utility model provides a kind of expander, comprises axle, and axle two ends covers has the core of rising, and the core outer race that rises has ringfeder, and the axle two ends are provided with rises by core and ringfeder about the axle Central Symmetry.

Adopt said structure, its beneficial effect is: the utility model expander is provided with identical rise core and ringfeder at the two ends of its axle, for the long motor stator of core length, can synchronous press mounting motor stator two ends seam, thereby the axle degree that guarantees the two ends seam is identical, has guaranteed the quality of motor stator.

Description of drawings

Fig. 1 is the structural representation of expander of the present utility model.

Among the figure: 1-axle, the 2-core that rises, 3-ringfeder.

Embodiment

The utility model is described in more detail below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of expander comprises axle 1, and axle 1 two ends covers has the core of rising 2, and core 2 outer race that rise have ringfeder 3, and axle 1 two ends are provided with rises by core 2 and ringfeder 3 about the axle Central Symmetry.

In the actual production, common expander can only be applicable to press-fit the shorter motor stator of core dimensions, for longer dimension, need to press-fit step by step, the effect of secondary press-fitting can not be identical, thus cause the axle degree of motor stator two ends seam not identical, thus affect the quality of motor.

The utility model expander has solved above-mentioned technical problem, motor stator is enclosed within on the expander, make the ringfeder 3 at expander two ends corresponding with the two ends seam of motor stator, because of two parts core 2 that rises identical with ringfeder 3, when press-fiting, identical to motor stator two ends seam applied pressure, generation to press-fit effect identical, so guaranteed two ends seam axiality, same precision.

Claims (2)

1. an expander comprises axle (1), it is characterized in that: described axle (1) two ends cover has the core of rising (2), and the described core that rises (2) outer race has ringfeder (3).

2. a kind of expander according to claim 1, it is characterized in that: the core that rises (2) that described axle (1) two ends are provided with and ringfeder (3) are about axle (1) Central Symmetry.

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