JP2003113923A - Power transmission apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost and amplify transmission power. SOLUTION: A magnet 1 provided on a driving side and a magnet 2 provided on the follower side are faced in a non-contact state, rotation on the driving side is converted, for transmission, to slide movement on the follower side by attraction and reaction of the magnets 1, 2.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention belongs to a technical field related to a power transmission device that transmits power from a driving side to a driven side.

[0002]

2. Description of the Related Art Generally, a mechanical structure such as a gear is adopted as a power transmission means for transmitting power from a driving side to a driven side. The mechanical structure has a characteristic that power transmission due to friction is large although the certainty of power transmission is high. Therefore, there has been a strong demand for the development of a power transmission means that has a high certainty of power transmission and a small power loss due to friction.

Conventionally, as a power transmission device having high reliability of power transmission and small power loss due to friction, for example, a device in which a fluid such as oil is interposed between a driving side and a driven side is known. ing.

In this conventional power transmission device, power is transmitted by causing a fluid to flow on the driving side and causing the driven side to follow the flow of the fluid.

[0005]

In the above-described conventional power transmission device, since the fluid is interposed between the driving side and the driven side, a precise sealing structure for sealing the fluid is required, and therefore, the manufacturing method There is a problem that the cost becomes high. Also,
Although the power loss due to friction is small, it is impossible to amplify the power transmitted.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a power transmission device capable of amplifying power transmitted at a low manufacturing cost.

[0007]

In order to solve the above-mentioned problems, the power transmission device according to the present invention employs the following means.

That is, in claim 1, the magnet provided on the driving side and the magnet provided on the driven side face each other in a non-contact state, and the rotational movement on the driving side is slid on the driven side by attraction and repulsion of the magnet. It is converted into motion and transmitted.

According to this means, the power is transmitted by the attraction and repulsion of the non-contact magnet, so that the seal structure for sealing the fluid becomes unnecessary. Further, the attraction force and repulsion force of the magnet for power transmission can be adjusted by the magnetic force of the magnet.

According to a second aspect of the present invention, in the power transmission device according to the first aspect, a plurality of drive-side magnets are radially arranged and are coupled so as to be synchronously rotatable, and the driven-side magnet is a drive-side magnet. It is characterized in that they are correspondingly arranged and are non-rotatably connected.

In this means, a plurality of sets of attracting and repelling magnets are radially formed.

According to a third aspect of the present invention, in the power transmission device according to the second aspect, one pair of drive-side magnets face each other in the axial direction of the radial arrangement and both sides are synchronously rotated with their magnetic poles being 180 degrees in phase. The magnet on the driven side is connected between the magnets on both sides of the driving side.

With this means, attraction and repulsion of the magnets are alternately switched on both sides of the pair of drive side magnets.

[0014]

Embodiments of the power transmission device according to the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIGS. 1 and 2, a total of eight magnets 1 of a pair of four on one side are radially arranged and face each other on the driving side, and on the driven side, a total of eight magnets 1 face each other. Corresponding four magnets 2 are located between the magnets 1 on both sides of the driving side.

These driving-side magnet 1 and driven-side magnet 2 are, as shown in detail in FIGS. 3 to 6,
It is housed inside a cylindrical casing 3.

The magnet 1 on the drive side is attached to a rotary plate 6 fixed to a rotary shaft 5 which is rotatably supported by an end surface 3a of a casing 3 via a bearing 4 in a radial manner.
Rotation gears 7 meshing with each other and capable of synchronous rotation are fixed to the ends of the rotation shaft 5 protruding from the casing 3. The drive gears 8 connected to the drive device A on the drive side are in mesh with the rotary gears 7 on both sides. 1
The pair of drive gears 8 are fixed to a common rotary shaft 10 that is rotatably supported by a bearing 9 attached to the peripheral surface 3b of the casing 3, and are capable of synchronous rotation.

As shown in FIGS. 1 and 2, the magnetic poles of the drive-side magnet 1 are oriented such that the same poles are located at the radial center and are 180 degrees in phase on both sides.

The driven magnet 2 is fixed to a base plate 13 fixed to a square shaft 12 which is non-rotatably and slidably supported by a bush 11 at the center of the end surface 3a of the casing 3.
It is installed on both sides of. The square shaft 12 is provided with a stopper 14 that comes into contact with the bush 11 and restricts the sliding area of the square shaft 12. The square shaft 12 is
The driven device B on the driven side is connected.

The direction of the magnetic pole of the driven magnet 2 is
As shown in FIGS. 1 and 2, the same poles are located at the radial center.

According to this embodiment, the drive gear A is rotationally driven by the drive device A on the drive side, so that the rotary gear 7 is synchronously rotated. The synchronous rotation of the rotary gear 7 causes the synchronous rotation of the four drive-side magnets 1 via the rotary shaft 5 and the rolling plate 6.

The synchronous rotation of the four magnets 1 on the driving side alternately changes the directions of the magnetic poles of the four magnets 2 on the driven side facing each other on both sides to match and reverse. As a result, the driven magnet 2 becomes the driving magnet 1
Are alternately attracted and repelled on both sides of the magnet, amplified, and reciprocated between both sides of the drive side magnet 1. Therefore, the square shaft 12 to which the driven device B on the driven side is coupled is reciprocally slid.

That is, the rotational movement on the driving side is amplified and converted into the sliding movement and transmitted to the driven side.

In the transmission of this power, air is merely applied as resistance in the reciprocating motion of the driven-side magnet 2 (the substrate 13), so that the power loss due to friction becomes extremely small. Further, since the fluid is not interposed between the driving side and the driven side, the sealing structure for sealing the fluid is not required and the structure of the casing 3 and the like is simplified. Therefore, the overall manufacturing cost becomes low.

Further, according to this embodiment, since the power is transmitted by utilizing the attraction and repulsion of the magnets 1 and 2, the magnetic force of the magnets 1 and 2 is adjusted,
The power transmitted can be greatly amplified.

As described above, in addition to the illustrated embodiment, the inside of the casing 3 can be evacuated in order to reduce the air resistance of the reciprocating motion of the driven side magnet 2 (substrate 13).

[0027]

As described above, in the power transmission device according to the present invention, the power is transmitted by the attraction and repulsion of the magnet in the non-contact state, thereby eliminating the need for the seal structure for sealing the fluid. It has the effect of reducing the manufacturing cost.

Furthermore, since the attraction force and repulsion force of the magnet for power transmission can be adjusted by the magnetic force of the magnet, the power transmitted can be amplified.

Further, since the drive-side magnet and the driven-side magnet are in non-contact with each other, there is an effect that the power loss due to friction becomes smaller than that of the above-described power transmission device using fluid.

Further, according to claim 2, since a plurality of magnets for attracting and repelling are radially arranged, there is an effect that reliability of power transmission is enhanced.

Further, as claimed in claim 3, the attraction and repulsion of the magnets are alternately switched on both sides of the pair of magnets on the driving side, so that the sliding motion on the driven side is accelerated and the transmitted power is amplified. is there.

[Brief description of drawings]

FIG. 1 is a principle perspective view showing an embodiment of a power transmission device according to the present invention.

FIG. 2 is another operation diagram of FIG.

FIG. 3 is a detailed vertical sectional view of FIG.

FIG. 4 is a plan view of FIG.

5 is a cross-sectional view taken along line XX of FIG.

6 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

1 magnet (drive side) 2 magnet (driven side)

Claims (3)

[Claims] 1. A magnet provided on a driving side and a magnet provided on a driven side are opposed to each other in a non-contact state, and rotational movement on the driving side is converted into sliding movement on the driven side by attraction and repulsion of the magnet. Power transmission device to transmit. 2. The power transmission device according to claim 1, wherein a plurality of drive-side magnets are radially arranged and connected so as to be synchronously rotatable, and a driven-side magnet is arranged corresponding to the drive-side magnet. A power transmission device characterized in that it is non-rotatably connected. 3. The power transmission device according to claim 2, wherein one pair of magnets on the driving side face each other in the axial direction of the radial arrangement, and both sides are coupled so as to be synchronously rotatable with their magnetic poles being 180 degrees in phase. A power transmission device characterized in that the driven-side magnet is located between both drive-side magnets.