US 5,090,261 A · Geared motor

Abstract

A geared motor comprising a rotating axle rotating in accordance with the rotation of a rotor, a gear rotating axle for outputting from the rotating axle speed reduced rotation, and a flexible coupling consisting of a first coupling disposed on the rotating axle of the rotor and rotating together with the rotating axle and the rotor, a second coupling disposed on the gear rotating axle, and rotating together with the gear rotating axle, a rubber damper disposed between the first coupling and the second coupling for transmitting the rotation of the first coupling to the second coupling, a thrust-force bracing member disposed between the rotating axle of the rotor and the gear rotating axle and in contact with the rotating axle and the gear rotating axle, for transmitting thrust force from one of the rotating axle of the rotor and the gear rotating axle to the other of the two arranged so that even if thrust force acts on the rotating axle of the rotor or on the gear rotating axle, the thrust force does not act on the first and second couplings or the rubber damper, due to the thrust force bracing member. Therefore, the life-expectancy of both of the couplings and the rubber damper, and therefore of the flexible coupling, is improved.

Claims23

Dependent claims

A geared motor having speed reduction structure for outputting rotation which is at a speed reduced from the speed of rotation of a rotor, comprising:

a stator and a rotor;
a rotating axle coupled to said rotor and which rotates in correspondence with rotation of said rotor;
a gear rotating axle aligned with said rotating axle so that the rotational axis of the gear rotating axle is substantially the same as the rotational axis of said rotating axle;
a first coupling member disposed on said rotating axle and rotating together with said rotating axle and said rotor;
a second coupling member disposed on said gear rotating axle and rotating together with said gear rotating axle;
an elastic damping member disposed between said first coupling member and said second coupling member, for transmitting rotation of said first coupling member to said second coupling member;
and
a thrust force bracing member disposed between said rotating axle and said gear rotating axle and in contact with both said rotating axle and said gear rotating axle, for bracing thrust force between said rotating axle and said gear rotating axle along an axis of thrust that substantially coincides with the rotational axis of the gear rotating axle.

5 more elements

A geared motor having speed reduction structure for transmitting rotation which is at a speed reduced from the speed of rotation of a rotor, to an operating member, comprising:

a stator and a rotor;
a rotating axle coupled to said rotor and which rotates in correspondence with rotation of said rotor;
a gear rotating axle for transmitting rotation of said rotating axle, disposed such that the rotational axis of said gear rotating axle is substantially the same as the rotational axis of said rotating axle;
a wheel engaging said gear rotating axle, for transmitting speed reduced rotation of said gear rotating axle to an operating member;
a first coupling member disposed on said rotating axle and rotating together with said rotating axle and said rotor;
a second coupling member disposed on said gear rotating axle and rotating together with said gear rotating axle;
an elastic damping member disposed between said first coupling member and said second coupling member for transmitting rotation of said first coupling member to said second coupling member;
a thrust force transmitting member disposed between said rotating axle and said gear rotating axle and in contact with both said rotating axle and said gear rotating axle, for transmitting thrust force from one of said rotating axle and said gear rotating axle to the other of said rotating axle and said gear rotating axle along an axis of thrust, and comprising a body having two convex surfaces facing one end of said rotating axle and one end of said gear rotating axle, respectively;
and
a thrust force adjusting means for adjusting the the position of said gear rotating axle with respect to said rotating axle by moving said gear rotating axle along the axis of thrust.

7 more elements

Dependencies are inferred from the claim text.

Geared motor

Life of this patent

Geared motor

Life of this patent

Abstract

Claims23