ROTATIONAL POWER TRANSMISSION MECHANISM AND HEAT TREATMENT FURNACE

• US 20180138796A1
• Filed: 10/26/2017
• Published: 05/17/2018
• Est. Priority Date: 11/14/2016
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: YAMASHITA, Osamu
• Application Number:
  US15/794,052
• Publication Number:
  US 20180138796A1
• Time in Patent Office: Days
• CPC Class Codes: F16D 3/10 Couplings with means for varying the angular relationship of two coaxial shafts during motion
• CPC Class Codes: F16D 3/12 specially adapted for accumulation of energy to absorb shocks or vibration by making use of fluid elements F16D3/80
• CPC Class Codes: F16D 3/64 comprising elastic elements arranged between substantially-radial walls of both coupling parts
• CPC Class Codes: H02K 2201/03 Machines characterised by aspects of the air-gap between rotor and stator
• CPC Class Codes: H02K 49/102 Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact magnetized gearings with physical contact F16H13/12, F16H49/005
• CPC Class Codes: H02K 49/104 Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
• CPC Class Codes: H02K 49/106 with a radial air gap
• CPC Class Codes: H02K 49/108 with an axial air gap

Abstract

A rotational power transmission mechanism includes: an input shaft and an output shaft that are apart from each other; a first rotary member fixed to a tip end of the input shaft on an output shaft side of the input shaft; and a second rotary member fixed to a tip end of the output shaft on an input shaft side of the output shaft so as to face the first rotary member. Into recessed portions, projected portions are inserted, permanent magnets are respectively provided on a pair of contact surfaces of each recessed portion and on a pair of contact surfaces of each projected portion in such a manner that the recessed portion and the projected portion repel each other at the respective pairs of contact surfaces where the recessed portion and the projected portion come into contact with each other.

Claims

1. A rotational power transmission mechanism comprising:

an input shaft and an output shaft that are apart from each other;

a first rotary member fixed to a tip end of the input shaft on an output shaft side of the input shaft; and

a second rotary member fixed to a tip end of the output shaft on an input shaft side of the output shaft so as to face the first rotary member,

wherein

into a recessed portion formed around a rotational axis of one of the first rotary member and the second rotary member, a projected portion formed around a rotational axis of the other of the first rotary member and the second rotary member is inserted such that the first rotary member and the second rotary member are coupled to each other in a relatively rotatable manner,

and

permanent magnets are respectively provided on a pair of contact surfaces of the recessed portion and on a pair of contact surfaces of the projected portion in such a manner that the recessed portion and the projected portion repel each other at the respective pairs of contact surfaces where the recessed portion and the projected portion come into contact with each other through relative rotation between the first rotary member and the second rotary member.

2. The rotational power transmission mechanism according to claim 1, wherein

in the projected portion, the permanent magnets in the pair of contact surfaces have different polarities from each other.

3. The rotational power transmission mechanism according to claim 1, wherein

a plurality of recessed portions are formed with intervals along a circumferential direction of the first rotary member,

and

a plurality of projected portions are formed with intervals along a circumferential direction of the second rotary member.

4. A heat treatment furnace comprising:

the rotational power transmission mechanism according to claim 1;

a motor coupled to the input shaft of the rotational power transmission mechanism;

a fan fixed to a tip end of the output shaft of the rotational power transmission mechanism; and

a furnace body,

wherein

the fan is disposed inside the furnace body.