JPH0135970Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is a reduction gear that is small in size, has low torque, has a large reduction ratio, and does not cause backlash, and is used to drive moving elements of precision equipment such as measuring instruments. Regarding.

[Prior Art] This type of speed reduction device is disclosed in Japanese Utility Model Application Publication No. 56-171457. In other words, the sun roller, planetary roller, inner roller, carrier, etc. constitute the first stage reducer, and the second stage reducer connected thereto is also constructed in the same manner. and a second case that covers the outer periphery of the side surface.

[Problems to be solved by the invention] In the conventional speed reduction device described above, the rolling contact surfaces of each component are parallel to the input/output axis of the device, and the inner roller that makes rolling contact with the planetary roller is arranged in the second case. Furthermore, since the planetary rollers are arranged on each of the two carriers, it is necessary to assemble the internal components from two directions, one in the same direction as the input and output shaft of the device, and the other in the perpendicular direction, which is troublesome. However, it has the disadvantage of high cost.

The present invention solves the above-mentioned conventional drawbacks, and aims to provide a reduction gear device with a simple assembly structure.

[Means for Solving the Problems] In order to achieve the above object, the speed reduction device of the present invention includes a case, a lid part disposed in an opening on one side of the case, and a part from the lid part into the case. A rotary sleeve that is arranged to protrude and whose outer periphery is formed with an inclined surface to which rotational force is applied, and a shaft that is fixed to the inner surface of the lid part with an inclination and are located at three equal positions on the circumference with the rotary sleeve as the center. The rotating roller is located in the case and has a rotating roller whose inner side makes rolling contact with the rotating sleeve, a large diameter circumferential part with an inclined inner surface on one side, and a small diameter part with an inclined outer surface on the other side, and the large diameter roller is located inside the case. The inclined inner surface of the circumferential part makes rolling contact with the outside of the rotating roller, and is rotatable into the other side of the case facing the reduction disk supported by the rotation roller and the small diameter part of this reduction disk. A rotary disk is provided, and a rotary disk is fixedly attached to the outer circumference of the rotary disk.
A fixed ring whose inner surface is an inclined surface, and a rotary disk which is arranged on a surface of the rotary disk facing the deceleration disk with its axis tilted at each of three equally divided positions on the circumference centered on the center of the rotary disk. , comprising a planetary roller whose inner side is in rolling contact with the inclined outer surface of the small diameter portion of the reduction disk and whose outer side is in rolling contact with the inner circumference of the fixed ring, and an output shaft connected to the center of the rotary disk. shall be.

[Example] An example of the present invention will be described based on the drawings. The motor 1 is fixed at the center of the lid 3 of the case 2, and an output shaft 4 is protruded into the case 2. A rotary sleeve 5 whose outer peripheral surface is inclined to the left is fixed to the output shaft 4. A fixing plate 6 is disposed inside the lid 3 of the case 2, and the fixing plate 6 has pins 7 arranged circumferentially in three equal parts around the rotating sleeve 5, with pins 7 inclined to the left. A bearing 8 is disposed on this pin 7, the inside of this bearing 8 is in rolling contact with the outer peripheral surface of the rotating sleeve 5, and the outside of the bearing 8 is a large diameter cylinder inclined to the left of the reduction disk 10. A reduction disk 10 is supported by the three bearings 8, and a small diameter portion 12 whose outer peripheral surface is inclined leftward is disposed at the center of the left side of the reduction disk 10. The rotating sleeve 5, the bearing 8, and the large diameter cylindrical portion 11 of the deceleration disk 10 constitute a deceleration mechanism.

A rotary disk 21 is disposed on the left side of the deceleration disk 10 so as to face each other, and the deceleration disk 10
A planetary bearing 20 is in rolling contact with the small diameter portion 12 of the rotary disk 21, and this planetary bearing 20 is arranged on a pin 22 that is tilted to the left and stands at a position divided into three equal parts circumferentially on the rotating disk 21. Further, the outer side of the planetary bearing 20 is in rolling contact with the leftwardly inclined inner circumferential portion of a fixing ring 23 fixed to the case 2.

For this purpose, the small diameter portion 12 of the reduction disk 10, the planetary bearing 20, the fixed ring 23, and the rotating disk 21 constitute a planetary reduction mechanism.

The central portion of the rotary deceleration disk 21 can decelerate the output shaft 30 rotatably supported by the case 2 and transmit the deceleration to the output shaft 30 .

[Function] According to the deceleration device of the present invention, since the parts that come into contact with the rollers are inclined, the output shaft, rotating disk, fixed ring, and planetary rollers are installed in the case, and then the deceleration disk is housed in the case. Further, assembly is accomplished by attaching a rotating sleeve fixed to the output shaft of the motor and assembling it to the lid case to which the rotating roller is fixed. In short, it can be assembled in the direction of the device input/output axis.

[Effects of the Invention] As described above, the speed reduction device of the present invention can be assembled in the input/output axis direction of the device, does not require troublesome assembly or adjustment, and can reduce costs.

[Brief explanation of the drawing]

FIG. 1 shows a sectional view of a reduction gear device according to an embodiment. 1...Motor, 2...Case, 3...Lid, 4
... Output shaft, 5 ... Rotating sleeve, 6 ... Fixed plate, 7 ... Pin, 8 ... Bearing, 100 ...
Reduction disk, 11...Large diameter inner peripheral part, 12...Small diameter part, 20...Planetary bearing, 21...Rotating disk, 22...Pin, 23...Fixing ring, 3
0...Output shaft.

Claims (1)

[Scope of utility model registration request] A case, a lid disposed in an opening on one side of the case, a rotating sleeve that protrudes into the case from the lid and has an inclined surface on its outer periphery to which a rotational force is applied, and the lid. The shaft is tilted and fixed on the inner surface of the part, and is located at each of three equally divided positions on the circumference around the rotating sleeve, and has a rotating roller whose inner side makes rough contact with the rotating sleeve, and an inclined inner surface on one side. comprising a large-diameter circumferential portion and a small-diameter portion having an inclined outer surface on the other side, the inclined inner surface of the large-diameter circumferential portion being in rolling contact with the outer side of the rotating roller;
and a reduction disk supported by rotating rollers, a rotation disk rotatably disposed within the other side of the case opposite to the small diameter portion of the reduction disk, and a rotation disk fixed to the outer periphery of the rotation disk. and a fixed ring whose inner surface is an inclined surface, and axes arranged at three equal positions on the circumference centered on the center of the rotating disk, on the surface of the rotating disk facing the deceleration disk. The inside is in rolling contact with the inclined outer surface of the small diameter part of the reduction disc, and
A speed reduction device consisting of a planetary roller whose outer side is in rolling contact with the inner circumference of a fixed ring, and an output shaft connected to the center of the rotating disk.