JPS622060A - Planetary wheel mechanism - Google Patents

Abstract

PURPOSE:To prevent a mechanism, when its turning effect is transmitted, from generating a sound, by providing magnets, successively inverting their polarity, to be fixed to an opposed peripheral surface in each wheel of the planetary wheels mechanism. CONSTITUTION:A planetary wheels mechanism 10 comprises a sun wheel 11, planet wheels 12, internal wheel 13 and a carrier 14. The mechanism positions opposed peripheral surfaces of each wheel 11-13 to be set so that the wheels may be brought into rolling contact with each other, further each peripheral surface provides permanent magnets 21, successively inverting their polarity, to be fixed in an equal pitch. And if a turning effect is input to the sun wheel 11, the mechanism, attractively attaching different poles to each other in the permanent magnets 21 on each peripheral surface of the wheels 11-13 and transmitting the turning effect by their rolling contact, generates an output from the carrier 14.

Description

[Detailed Description of the Invention] B) Field of the Invention The present invention relates to a planetary wheel mechanism in which each gear of a planetary gear mechanism used as a speed reduction mechanism or a differential mechanism is formed by a wheel having a magnet fixed to the circumferential surface. Regarding.

(B) Background of the Invention Since each sun gear, planetary gear, and internal gear of a conventional planetary gear mechanism is composed of gears, the meshing noise of the gears is generated when the gears rotate.

Therefore, when used in a device installed in a quiet place,
There was a problem in that the above-mentioned meshing sound became noise.

(C) Purpose of the Invention The object of the present invention is to provide a planetary wheel mechanism that does not generate noise by transmitting the rotational force of each wheel using the attraction force of a magnet.

(D) Summary of the Invention The present invention is characterized in that it is a planetary wheel mechanism in which magnets whose polarities are sequentially reversed are fixed at equal pitches on the opposing peripheral surfaces of each wheel.

(E) Effects of the Invention According to the present invention, since the rotational force of the wheel is transmitted without contact by the attraction force of the magnet or by rolling contact, no sound is generated when the rotational force is transmitted.

Therefore, even if the planetary wheel mechanism is used in a device installed in a quiet place, there is no noise and the device can be used in a quiet state.

(f) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawings show a planetary wheel mechanism, and in FIGS. 1 and 2, this planetary wheel mechanism 10 is composed of a sun wheel 11, a planetary wheel 12, an internal wheel 13, and a carrier 14.

A spline 15 is formed in the center of the sunwheel 11 described above for connection to a drive source such as a motor.

The planetary wheel 12 described above is formed to have the same thickness as the sun wheel 11 described above, and a stepped portion 16 having the same thickness is formed on the inner peripheral surface of the internal wheel 13. On both sides,
A spacer 17.17 having an outer diameter is positioned around this wheel 12 and extends over a part of the sun wheel 11 and a part of the stepped portion 16 of the internal wheel 13.
8 is inserted and rotatably supported by the left and right carriers 14 and 14.

Therefore, these wheels 11, 12, 13 are sandwiched between spacers 17, 17, and are prevented from shifting in the axial direction.

The above-mentioned left and right carriers 14.14 are one carrier 1
4 (right side in Figure 1)
9 supports the distance between the two, and the free end of this support 19 is...
For example, both carriers 14.14 are connected by being fixed by over-tightening.

Further, in the center of one carrier 14 (on the right side in FIG. 1), for example, a spline 20 for connecting to an output shaft is formed.

The opposed circumferential surfaces of each of the wheels 11, 12, and 13 described above are positioned so that they can roll into contact with each other, and permanent magnets 21 with sequentially reversed polarities are fixed at equal pitches on each circumferential surface. are doing.

In the planetary wheel mechanism 10 configured in this way, when rotational force is input to the sun wheel 11, the wheels 11, 12 .
Permanent magnets 21 on each circumferential surface of 13 attract each other with different polarities and transmit rotational force through rolling contact, and when the internal wheel 13 is in a fixed state, the planetary wheel 12 revolves. An output is generated from the carrier 14.

In the embodiment described above, since each wheel 11, 12, 13 is in rolling contact, power is transmitted quietly without making any noise.

In addition, in the above-mentioned embodiment, the sunwheel 11 is used as an input section,
Although the carrier 14 is set as an output section, any of them may be set as an input section, an output section, or a fixed section.

Furthermore, the present invention can also be used in conventional differential mechanisms.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a planetary wheel mechanism, and FIG. 2 is a partially cutaway front view. 10... Planetary wheel mechanism 11... Sun wheel 12... Planetary wheel

Claims (1)

[Claims] 1. A planetary wheel mechanism comprising a sun wheel, an internal wheel, and a planetary wheel interposed between the sun wheel and the internal wheel and supported by a carrier, comprising: A planetary wheel mechanism in which magnets with sequentially reversed polarity are fixed at equal pitches on the opposing circumferential surfaces of each wheel.