JPH03249427A - Rotor fixing device - Google Patents

Abstract

PURPOSE:To increase transmission power, and to prevent eccentricity and the loosening of a screw by making a press screw portion of a boss hollow, by providing a notch on the boundary of the boss and a rotor main body, and by providing a press pin on the reverse side of the press screw. CONSTITUTION:When a press screw is screwed in, a boss hollow part 1 receives a reaction outward by which a shaft is pushed. At the time, since the displacement of the boss part is easy due to the flexibility of a notch 2, the displacement is directed in the side of the press screw. Since a pin 3 placed on the lower part is moved upward, and gives the same force to the shaft, the shaft is fixed by the press screw as well as the pin 3. Since the boss and a rotor main body are linked with each other through the remainder of the notch 2, rotational force is transmitted therethrough. Transmission power is increased thereby, and eccentricity due to the effect of the power of the press screw does not occur. Also, the screw is not loosened due to the elastic effect generated by the notch 2. Advantages of a conventional compactness and the same handling operation can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION In the conventional boss fixing method using a set screw, rotation was transmitted by the pressing force between the set screw and the shaft.

In this device, when the set screw is screwed in, the boss hollow part I receives a reaction force pushing the shaft outward. At this time, the boss part is easily displaced due to the flexibility of the notch part 2, so it is displaced toward the set screw.The pin 3 located below also moves upwards and applies the same force as the set screw to the shaft, so the shaft is eventually pushed. You will be able to write fixedly with screws and pins. Since the boss and the rotating body are connected through the remaining thickness of the notch 2, the rotational force is transmitted through this. Note that the displacement of the boss portion is minute, and in order to achieve this purpose, the outer diameter of the boss may be the same as the conventional one. Also, in the case of a small diameter shaft, it is effective to omit the pin and press the boss directly against the shaft.

This device increases transmission power. Eccentricity does not occur due to the influence of push screws. The screw does not loosen due to the elastic action generated from the notch. It has the advantage of being compact and can be handled in the same way as before.

Of course, it is also effective not only for fixing to a rotating body but also for fixing to a shaft.

[Brief explanation of drawings]

1 is a cutaway front view, and FIG. 2 is a side view, in which I is a hollow portion, 2 is a cutout portion, and 2' is a remaining wall portion 3 which is a push pin. Patent applicant Keinori Tokunaga

Claims (1)

[Claims] The set screw (set screw) part 1 of the boss is made hollow so that it does not come into contact with the shaft. A notch 2 is provided at the boundary between the boss and the main body of the rotating body (the part in close contact with the shaft) to provide flexibility. A push pin 3 is also provided on the opposite side of the push screw. The rotating body fixing device configured as described above.