JPH1094241A - Magnetic gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heat or a tooth break from being generated owing to friction or abrasion and the disengagement of a gear or the breakdown of the shaft of the gear from being generated by a method wherein a permanent magnet is attached to the surface of the gear and the gear is turned by the repulsion of the permanent magnet. SOLUTION: Circular permanent magnets 2 are attached to the surface of a gear 1 as a nonmagnetic body, polarities of the permanent magnets 2 on the same surface of the gear 1 are made identical, and the gear is turned by making use of a shaft 3 as the center. In addition, the gear 1 may be formed in such a way that the surface of a magnetic body is covered with a nonmagnetic body and that attractive forces of the permanent magnets 2 do not act between the gear 1 and another gear 1, or that the gear 1 itself is made of permanent magnets 2 whose polarities on the same surface are identical and that the permanent magnets may be covered with a nonmagnetic body so as to leave parts in which magnetic forces are engaged. Then, the gear 1 may be formed as a doughnut-shaped gear without having the shaft 3 according to its application. In addition, the permanent magnets 2 can be attached to one face or both faces of the gear 1, and their ratio of rotation may be changed by one gear 1 with the difference in their mounting radius.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a gear in which a permanent magnet is attached to the surface of the gear instead of the gear teeth, and is rotated by the repulsive force of the permanent magnet. Further, the present invention is a disc brake in which a main gear is attached in place of a brake disc and a brake shoe of a disc brake, and the movement is stopped by a repulsive force of a permanent magnet.

Conventionally, a gear is rotated by meshing with the teeth of the gear. Therefore, if heat or loss of teeth occurs due to friction or wear, the meshing of the gear becomes poor and the gear mechanism stops functioning. was there. Further, there is a disadvantage that the gear is disengaged due to an excessive force applied to the gear, teeth are lost, and the rotating shaft of the gear is broken, so that the gear mechanism does not function. Conventionally, in a disc brake, a brake shoe is pressed against a brake disc and the movement is stopped by the friction, so that there is a problem that frictional heat is generated or the brake shoe is worn by friction.

[0003] The present invention is a gear that does not require cooling or lubrication with oil or the like and a clutch mechanism and has no limitation on the shape of the gear. Attach the permanent magnet 2 in a circular shape to
The polarity of the permanent magnet 2 on the same surface of the gear 1 is the same, and the gear 1 rotates about the rotation shaft 3. The gear 1 may be formed by covering the surface of a magnetic material with a non-magnetic material so that the attractive force of the permanent magnet does not work between the gear and the gear. It may be made of the same permanent magnet, and may be covered with a non-magnetic material except for a portion where the magnetic force is engaged. The gear 1 may be a donut-shaped gear without the rotating shaft 3 depending on the application. Further, the permanent magnet 2 can be mounted on one side or both sides of the gear 1 as necessary, and the rotation ratio may be changed by one gear depending on the mounting radius.

Further, the present invention relates to a disk brake which does not generate frictional heat or wear of parts. Referring to the drawings, a disk brake having a rotating shaft 3 and permanent magnets 2 attached to both surfaces is used. A brake pad 5 using a donut-shaped gear having the permanent magnet 2 attached only to the side facing the brake disk 4 without mounting the rotating shaft 3 so as to sandwich the brake disk 4 is provided.
The brake disk 4 rotates with wheels and the like. The brake pads 5 do not rotate, and are mounted at intervals such that the magnetic force of the permanent magnets 2 of the brake disks 4 and the brake pads 5 does not hinder the rotation of the brake disks 4.
Then, a braking effect is created by reducing the distance between the brake disc 4 and the brake pad 5. However, the brake pad 5 is not brought into contact with the brake disc 4. Note that the brake pads 5 may be fixed at a fixed interval, and the same braking effect may be provided by using a device that electrically draws a magnetic force instead of the permanent magnet 2.

[0005] With this configuration, the gear can be rotated by the repulsive force of the permanent magnet without causing the gear and the gear to contact each other. Therefore, heat and tooth loss due to friction and wear do not occur, and cooling and lubrication by oil and fat are performed. Is no longer necessary. Also,
When a rotational force exceeding the repulsive force of the permanent magnet is applied to the gear, the gear rotates over the magnetic field of the permanent magnet, so that the gear does not come off or the rotating shaft of the gear is destroyed, and has a function as a clutch. Further, if a permanent magnet is mounted on the surface of the gear in a circular shape, the gear functions as a gear, so that the shape of the gear itself may be triangular, quadrangular, or any shape.

Further, if the disk brake is configured as described above, the movement can be stopped without contact between the brake disk and the brake pad by the repulsive force of the permanent magnet, so that frictional heat and wear of parts do not occur. In addition, even if a rotational force exceeding the stopping force due to the repulsive force of the permanent magnet is applied, the wheel rotates over the magnetic field of the permanent magnet. Has functions.

[Brief description of the drawings]

FIG. 1 is a plan view of a gear.

FIG. 2 is a sectional view of a gear.

FIG. 3 is a sectional view of a disc brake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gear 2 Permanent magnet 3 Rotation axis 4 Brake disk 5 Brake pad

Claims (2)

[Claims] A gear that has a permanent magnet attached to the surface of the gear and rotates by magnetic force. 2. A disc brake using the gear according to claim 1.