JPH01250655A - Magnet decelerating and accelerating machine - Google Patents

Abstract

PURPOSE:To reduce noise of an accelerating and decelerating machine by arranging axially magnetized magnets like a ring on the peripheries having different diameters and centers of rotation and mutually attracting each one portion on the peripheries on the input shaft side and the output shaft side through a magnet fluid. CONSTITUTION:A large disc 9 and a small disc 10 are installed as a magnet large circle 7 and a magnet small circle 8 magnetized in the axial direction on the outer peripheries, the three faces of which are surrounded by yokes 14, 15 on input and output shafts 5, 6 on the case 3 inner end sides of the right and left input and output shafts 5, 6. The centers of rotation of the input and output shafts are parallel, but shifted from each other. The magnet large circle 7 and the small circle 8 are partially opposite to each other in the axial direction. Magnets magnetized to have different poles are disposed at equal spaces on the peripheries of the magnet large and small circles, whereby with one turn of one input and and output shaft 6 caused by mutual pulling of different poles, the rotation of the input and output shaft 5 in the same direction is accelerated or decelerated in the ratio of the number of poles. Thus, a gear is not used so as to prevent noise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure of a reduction/increase early warning that converts the torque of an input shaft to an output shaft and supplies the same.

[Summary of the invention]

The present invention is constructed using a combination of magnets magnetized with multiple poles on the circumference in order to transmit the movement of the decrement/increase early warning.

[Conventional technology]

Conventionally, as shown in Fig. 4, the speed reducer is immersed in lubricating oil 4 in a case 3, and transmits the torque from the input/output shaft 2 to the input/output shaft 2 by increasing or decelerating it through meshing of the gears 1. Ta.

[Problem to be solved by the invention]

In the conventional technology, there was a problem in that noise was generated due to meshing of gears.

[Means to solve the problem]

In order to solve the conventional problems, the present invention uses the attraction force between magnets instead of gears to construct an increase/decelerator.

[Effect]

The attraction between the magnets works through space without contact, so there is no noise at all.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In the sectional view of FIG. 1, the right and left input/output shafts 5.6 are fitted into the case 3 and are held by a ring 11 and a magnetic fluid ring 12. Right and left input/output shafts 5.6
A large disk 9° and a small disk 10 are attached to the inner end of the case in the axial direction on the outer circumference! H and three sides are attached to the right yoke 14.
Large magnet circle surrounded by left yoke 15 7. Small magnet circles 8 are fixed around the right and left input/output shafts 5.6 as rotation centers. Further, a gap 16 exists between the axially opposing surfaces of the magnet large circle 7 and the magnet small circle 8. The center of rotation of the left input/output shaft 6 and the center of rotation of the right input/output shaft 5 are parallel but offset. - The large magnet circle 7 and the small magnet circle 8 are axially magnetized with different polarities at equal intervals on the circumference. The diameter of the small magnet circle 8 is smaller than that of the large magnet circle 7, and therefore the number of different poles on the circumference is also small. As shown in FIG. 2, the magnet small circles and large circles 7 and 8 partially face each other in the axial direction. Therefore, several different poles of the magnet small circles and large circles 8 and 7 face each other and are attracted to each other. For example, if the number of poles of the magnet large circle 7 is 32 and the number of poles of the magnet small circle 8 is 30, and the left input/output shaft 6 is rotated once, the right input/output shaft 5 is rotated in the same direction with different poles facing each other. As a result, torque is transmitted to the input and output shafts, and
The number of rotations is decreased or increased by the ratio of the number of poles (32/30.30/32). Furthermore, since the magnetic fluid 13 is contained in the gap 16, the magnetic force of the sandwiched magnets increases the magnetic permeability of the gap 15 and increases the torque transmission rate. FIG. 3 shows another embodiment of the present invention in which the magnet arrangement is configured so that three sides of the magnet can be effectively used to increase the torque transmission rate.

〔Effect of the invention〕

As described above, the present invention has the effect of being able to configure a speed reducer with less noise by combining the magnetic attraction force of the magnet and the magnetic fluid in the air gap to transmit the torque of the speed increase/reducer.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main shaft portion of an embodiment of the present invention. FIG. 2 is a plan view of essential parts of the present invention, and FIG. 3 is a diagram showing another embodiment of the present invention. FIG. 4 is a diagram showing the structure of a conventional speed increaser/decelerator. 1...Gear 2...Input/output shaft 3...Case 4...Lubricating oil 5...Right input/output shaft 6...Left input/output shaft 7...Magnet large circle 8... Magnet small circle 9...Large disk 10...Small disk 11...Hair ring 12...Magnetic fluid sole 13...Magnetic fluid 14...Right side yoke 15...Left side yoke I6... ...Gear knob and above Applicant: Seiko Electronics Co., Ltd. Agent: Seiko Electronics Industries Co., Ltd.

Claims (1)

[Claims] In a speed reducer that increases/decelerates the torque input from the input shaft and outputs it to the output shaft, magnets magnetized in the axial direction are arranged in a ring shape on the circumference with different diameters and centers of rotation. A magnetic speed reducer characterized by a part of the circumference of the side and output shaft side attracting each other via magnetic fluid.