JPH01182654A - Rotation transmission device - Google Patents

Abstract

PURPOSE:To make rotation transmissible with noncontact and prevent dust from occurring as well as to dispense with any lubricant by constituting two gears with a base made up of a nonmagnetic material and a permanent magnet where all tooth parts set their addendums down to the same type magnetic pole. CONSTITUTION:Either of two gears 10a, 10b consists of bases 11a, 11b and tooth parts attached to these bases, and all tooth parts are constituted of permanent magnets 12a, 12b setting their addendums down to the same type magnetic pole N. Consequently, an addendum in a tooth part of the gear 10a on one side and that of the gear 10b on the other being engaged with the former both are of the same type magnetic pole N, whereby there is produced repulsive force between these addendums, and thus rotational transmission is achieved without direct contact between tooth parts themselves. Therefore there is no fear that any dust attributable to the direct contact between these gears 10a and 10b might be produced, and at the same time, use of any lubricant for preventing this dust from occurring is not required at all. Accordingly, it is effectively adoptable to such a vacuum filming device or the like that is apt to degrade a product due to the dust and the lubricant.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotation transmission device including two gears that engage with each other.

(Prior Art) Such a rotation transmission device is constructed, for example, as schematically shown in FIG.
Among them, one gear 3o is fixedly attached to a drive shaft J- rotated by a motor (not shown) K, and the other gear 31 is a driven shaft 34AI/c for rotating a rotated body 33. Fixedly mounted. Drive shaft 3 by motor
When the gear 30 is rotated via the driven shaft 34I, the gear 3 also rotates due to the engagement between the teeth of the gear 30 and the gear 31, and therefore the rotated body 33 also rotates via the driven shaft 34I. , transmission of rotation is achieved by sniffing.

In such a rotation transmission device, conventionally, each gear 3o
. ,
Transmission of rotation from gear 30 to gear 31 is achieved.

(Lit to be solved by the invention!@) The conventional rotation transmission device as described above has the disadvantage that the tooth portions are worn due to direct contact with the tooth portions, and dust is generated due to the wear with the tooth portions.

Therefore, for example, if a conventional rotation transmission device is used in a vacuum film deposition system, fine pinholes will be created in the film produced by the vacuum film deposition system due to the dust generated from the flakes. There is a risk that the membrane will become defective.

It is thought that a lubricant such as oil may be applied to the gears in order to reduce or eliminate wear on the teeth, but in vacuum film forming equipment, etc., this lubricant deteriorates the odor atmosphere and
As in the case of dust generation, this causes the membrane to be rejected.

The main object of the present invention is to eliminate the drawbacks of conventional rotational transmission devices as described above.

(Means for Solving the Problem) In order to achieve this purpose, a system configured according to the present invention,
In a rotation transmission device having one gear that engages with each other, each of the two gears has a base made of a non-magnetic material and a tooth portion attached to the base, and the tooth portions of both gears have a base made of a non-magnetic material and a tooth portion attached to the base portion. All are constructed of permanent foundation stones with homogeneous magnetic poles at the tips of all of them.

(Function) According to the rotation transmission device having such a configuration, the tooth tip of the tooth portion of one gear and the tooth tip of the tooth portion of the other gear that engages with the rib are of the same type of magnetic pole, and A repulsive force is generated at the threshold of , so that transmission of rotation is achieved without direct contact of the toothed parts.

(Embodiments) Hereinafter, embodiments of the rotation transmission device according to the present invention will be described with reference to FIGS. 1 to 4 of the drawings.

The rotational transmission device according to the invention as illustrated in FIGS. 1 and 2 comprises two mutually engaging gears i.

a and lOb. Each gear lOa, lOb has a disc-shaped base made of non-magnetic material //a and //1)
Each base //a, //b has a number of rod-shaped permanent magnets arranged at equal intervals along the circumference of the base so as to protrude radially outward from the base //a, //b. ja,
/ 2 b is attached as a tooth part. In both gears 10a and 10b, all of the permanent magnet l cores a and 10b have a positive pole N at the radially outer tooth tip.
On the other hand, the negative electrode S is oriented radially inward at a point connected to the base portions //a and 10b. both gears 10
a and iob, in the area where their circumferences are closest, the tooth tip N of one hour wheel Oa or 10b is the same as the other hour gear 10.
It is arranged so that there is a distance 1f'L between the tooth tips N of the teeth b or 10h.

To exemplify the attachment of the tooth portions, that is, the permanent magnets l cores a and /b to each base //a, //b, for this purpose, each base //a,...//b has shallow indentations 13a, /3b
And many deep depressions that will continue to sink/4Ca
, /IIb are formed. Shallow corners /3&, /3b are annular fixed plates /Ja having the same outer diameter as the bases //a, //b.

/jt)? It has a accommodating geometry and extends along the entire circumference of the base. The deep holes a, /lb slightly stretch the radially inner portions of each permanent magnet /Ja, /J'b into the shallow holes /Jh, /3b in the width direction of the base. It is shaped, dimensioned and arranged to be removable and extends in the form of a groove to the outer periphery of the base. deep depression.

In each of /la, /lb, there are permanent magnets a, /lb.
A fixing plate /j is placed in a shallow recess /3e, , l, lb to accommodate the 2b and cover the radially inner part of the
Place a, /jbli, fixing plate lsa * / j b
Along (permanent magnet/, l*, 1213Vc not in contact)
In many places, fixing plates /ja, /jb are attached to the base //a by means of tightening screws /6a, /Ab.

// When fixed and tightened to b, permanent magnet saw a.

The permanent magnet saw a*/2b is attached to the fixed plate /j because the l piece b slightly protrudes into the shallow hole/jae/Jb that accommodates the fixed plates /ja and /jb.
It is firmly clamped between a #isb and the base //a, //'b and is fixedly and firmly attached to the base //a, //b.

In the rotary transmission device configured in this way, one gear lOa is fixedly attached to, for example, the drive shaft /7a, and the other gear 101) is fixedly attached to, for example, the driven shaft lb. For example, a motor (not shown) drives the shaft/'7a.
When the gear 10h is rotated, the gear 10h also rotates. At that time, when one tooth tip of the gear 10a, that is, the positive pole N of the permanent magnet l core a- approaches the other gear 10b (one tooth tip, that is, the positive pole NK of the permanent magnet saw b), the gap between the positive pole N and the positive pole N Due to the repulsive force of gear lOb, the permanent magnet /Jb
The positive pole N of the gear lOa moves in the same direction as the positive pole N of the permanent magnet l core a of the gear lOa. Thus, gear lOa and gear lOb
As in the conventional rotation transmission device in which the gears are in direct contact with each other without contacting each other, the rotation of the gear 10a, for example counterclockwise (arrow igth) in FIG. For example, in Figure 1, clockwise rotation (arrow 1)
gb) occurs. As the gear lOb rotates, the driven shaft 1'lb to which it is fixedly attached also rotates, and the rotation of the driven shaft 17b also rotates a rotated body (not shown).

In such a rotation transmission device, the width W-da 1oI (Fig. 1), the thickness t-μm 1oI (Fig. 2), the length t-, 20-μm (
The graph of FIG. 3 shows the experimental results using the samarium cobalt magnet and ferrite magnet of FIG. 1 as permanent magnets l-core a and /2b. This graph shows the gear/
(The horizontal axis is the meshing depth (1 order 1) b (Fig. 7) between 7a and iob, and the vertical axis is the transmissible torque Q.
It represents the change in Q when changing . According to the experimental results, when a lever, a samarium cobalt magnet, or a ferrite magnet is used, the maximum rotational transmission force is obtained when the engagement depth L is approximately -fin.

FIG. 4 shows another embodiment of the rotation transmission device according to the invention. In this embodiment, a large sun wheel is fixedly arranged, and at the tips of six arms 21 that are fixed to a rotating shaft 20 coaxial with the sun gear and extend radially from the rotating shaft 20, A small planetary gear is rotatably attached to this.

Each of the planet gears Coco and the sun gear 19 is constructed similarly to the gears lOa and lOb in the embodiment shown in FIGS. 7 and 2, and each planet gear is engaged with the sun gear l.

In the embodiment shown in FIG. 4, when the rotating shaft O is rotated, all of the six planetary gears 2 will move around the axis of rotation @-0, that is, the center axis of the sun gear 19, as shown by the arrows. As shown by 3, the sun gear revolves around the same time as the sun gear 1, and at the same time it engages with the fixed sun gear 1, so the arrow -
It rotates more than shown by da.

According to such a configuration, it is possible to provide a rotation-revolution means that does not bring gears into direct contact and can be used as a planetary jig for a vacuum lid attachment fIL or a sputtering device.

(Effects of the Invention) According to the present invention, all the tooth portions of the mutually engaging λ gears are constituted by permanent magnets with the same type of Vb & on the tooth tips, so that the same type of magnetic poles The rotation of one of the mutually engaged gears is transmitted to the other gear by the repulsive force generated between the tooth tip of one output gear and the tooth tip of the other gear. Or the fourth
As shown in the illustrated embodiment, the revolution of the fixed gear wheel of the other also results in the rotation of the latter gear.

These operations are achieved without direct contact between the gears, and therefore, according to the rotation transmission device of the present invention, there is no risk of dust being generated due to direct contact between the gears, and there is no possibility that such dust will be generated. There is no need to use lubricants to prevent this from occurring.

Therefore, the rotation transmission device according to the present invention can be particularly effectively employed in vacuum film forming apparatuses and the like where there is a risk of product defects due to dust or lubricant.

[Brief explanation of the drawing]

FIG. 7 is a front view showing a seventh embodiment of the rotation transmission device according to the present invention. Figure 1 is a graph showing the results of the experiment in Figure 1. FIG. 4 shows a first embodiment of the rotation transmission device according to the invention. FIG. S is a perspective view of a conventionally known rotation transmission device It'ft. In the drawing, lOa and iob are gears that engage with each other, //a and //1) are the bases of the gears, l2a and lcob are permanent magnets forming the teeth of the gears, N and S indicate the positive and negative poles of the permanent magnet, /2a*/-2b. Figure 2: Knee-a417-t. 3rd figure power) Miai 5 hare L (myo) Figure 4

Claims (1)

[Claims] Both of the two gears that engage with each other consist of teeth attached to a base made of non-magnetic material, and all the teeth of both gears have the same type of magnetic pole on their tips. A rotation transmission device composed of permanent magnets.