JP2008064285A - Actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an actuator using a plurality of prime movers for rotating one rotating shaft via a gear mechanism, thus producing smooth rotation. <P>SOLUTION: Conventionally, when great power is required by the actuator which uses a prime mover for rotating one rotating shaft via the gear mechanism, the large prime mover is used or a plurality of small ones are used in a narrow site. However, when the plurality of prime moves are used, inevitable rotating dispersion occurs between the prime movers to produce no smooth rotation. When the plurality of prime movers are used for rotating one rotating shaft via the gear mechanism, a timing mechanism is provided between the prime movers for cancelling the rotating dispersion therebetween, thus producing smooth rotation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to an actuator that rotates a single rotating shaft by a gear mechanism using a plurality of rotary prime movers.

    When a rotary prime mover (hereinafter simply referred to as prime mover) requires a large force with an actuator that rotates a single rotating shaft with a gear mechanism, it is naturally conceivable to make the prime mover large. However, if the prime mover must be installed in a small space, the prime mover must be divided into a plurality of small items. However, there is variability in rotation between the prime movers, and if you try to synchronize with one rotating shaft after converting it to high torque with the gear mechanism, it will interfere with each other and rotate the rotating shaft smoothly. I couldn't.

The actuator itself and the timing belt itself which is a timing mechanism are also known.

An object of the present invention is to provide an actuator capable of obtaining a smooth rotation while rotating a single rotating shaft by a gear mechanism with a plurality of prime movers.

In the present invention, when a single rotating shaft is rotated by a gear mechanism with a plurality of prime movers, a timing mechanism such as a timing belt is provided between the prime movers so as to cancel each other in rotation variations and the like.

According to the present invention, it is possible to obtain a smooth rotation while rotating a single rotating shaft by a gear mechanism with a plurality of prime movers.

FIG. 1 shows a first embodiment. In the figure, reference numeral 1 denotes an electric motor which is a prime mover. In this embodiment, four electric motors (hereinafter simply referred to as motors) are used. A reduction gear 2 is provided at one end of the motor 1, through which the power is transmitted to the gear train 3, and one gear in the gear train 3 and the gear 5 provided on the rotary shaft 4 are meshed and rotated. The axis 4 rotates.

Even with such a structure, the rotation shaft 4 naturally rotates, but there is a variation between the motors 1 and the rotation does not become smooth. Therefore, in this embodiment, a pulley 7 is provided at the other end 6 of each motor 1 and a timing belt 8 is passed between the pulleys 7. By doing so, it was confirmed that the variation between the motors 1 was eliminated.

Even if the timing belt is replaced with a gear, the same effect can be obtained. A chain or V belt may also be used.

FIG. 2 shows a second embodiment, which is the same as the first embodiment except that the whole has an inverted L shape.

It is a front view which shows the Example of the actuator which becomes this invention. It is a perspective view which shows the other Example of the actuator which becomes this invention.

Explanation of symbols

1 motor
2 Reducer
3 Gear train
4 Rotating axis
5 gears
6 The other end of motor 1
7 pulley
8 Timing belt

Claims (1)

An actuator comprising: a plurality of rotary prime movers rotating one rotary shaft by a gear mechanism and providing a timing mechanism between the rotary prime movers.

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