JPS5824667Y2 - Rolling transmission type planetary roller device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a rolling transmission type planetary roller device applied to a rolling reduction gear or a speed increaser.

As shown in FIGS. 1 and 2, the conventional rolling transmission type planetary roller device has a plurality of planetary rollers 2 supported by a carrier 7 interposed between a sun roller 1 and an inner roller 3 to drive the sun. The roller 1 and the planetary roller 2 are brought into close contact with each other.

In other words, the planetary roller 2 is press-fitted between the inner roller 3 and the sun roller 1, which are fixed to the casing 4 rotatably mounted around the carrier 7 via the bearing 13, and a pressing force is applied in the radial direction to each contact portion. PN (hereinafter referred to as normal force) is applied.

At this time, both ends of the support shaft 5 of the planetary roller 2 are connected to the carrier 7.
It is fitted into a radial groove m cut out in the radial groove m and is supported so that it can move freely in the radial direction.

Therefore, for example, when the sun roller 1 is rotated as the input shaft, the planetary roller 2 revolves around the sun roller 1 while rotating, that is, it rolls, so only the rotation due to the revolution is extracted to the carrier 7, which is the output shaft. be done.

In other words, the speed will be reduced. This conventional rolling transmission type planetary roller device has no problems when rotating at low speeds, but
When rotating at high speed, various problems occur.

That is, the centrifugal force Fp based on the revolution of the support shaft 5 of the planetary roller 2 acts on the bearing 6 of the planetary roller 2 due to the high speed rotation, so that the bearing life is significantly reduced.

Moreover, a bearing 6. which includes this support shaft 5. An excessive pressing force PNt (PNt>PN) acts on the pressing surface between the planetary roller 2 and the inner roller 3 due to the centrifugal force Ft caused by the revolution of the planetary roller 2, which reduces the durability of the pressing surface.

Furthermore, on the other hand, the most important thing is that the planetary roller 2
and the pressing force PN of the pressure contact surface of the sun roller 1 decreases to PN8.
(PNS<PN), resulting in a decrease in rolling transmission force.

In addition, code 8 is a cover, and 9 is a mounting bolt. 10.11,1
Buttons 2 and 13 indicate bearings.

The present invention solves the various problems associated with high-speed operation that the conventional technology described above has, and provides a rolling transmission type planetary roller device that prevents the planetary rollers, etc., that click during high-speed operation from shifting outward. The purpose is to

The configuration of the present invention to achieve such an object includes interposing a plurality of planetary holes movably in the radial direction on a carrier coaxial with the sun roller between the sun roller and the inner roller surrounding the sun roller. The rolling transmission type planetary roller device for transmitting the rotation between the sun roller and the carrier is pressed, and each support shaft is attached to both ends of the support shaft of the planetary roller that is mounted so as to be movable in the radial direction with respect to the carrier. It is characterized in that a ring is fitted inside at the same time, and the centrifugal force acting on the planetary roller etc. during rotation is supported by the ring.

The configuration of the present invention will be explained in detail below based on a specific example shown in the drawings and FIGS. 3 and 4.

Components that are the same as those in the prior art shown in FIGS. 1 and 2 are given the same reference numerals. In the rolling transmission type planetary roller device, a planetary roller 2 supported by a carrier 7 coaxial with the sun roller 1 is attached to the sun roller. The carrier I and the sun roller 1 are connected through the planetary roller 2.

The key/V rear 7 that supports the planetary roller 2 and the sun roller 1 are butted against each other with a gap between them, and the two bearings 10 and 1
1 and are rotatably fitted into each other.

A cylindrical frame in which three planetary rollers 2 are housed at intervals of 12e is formed at the tip of the carrier 7, and a radial groove m is formed in the portion of this frame in which the planetary rollers 2 are housed. .

The cage ring 4 is for supporting the inner roller 3 which functions as a tightening ring for pressing the planetary roller 2 against the sun roller 1, and is supported through a bearing 13 so that it rotates in the opposite direction to the sun roller 1 during rotation. Attached to carrier I.

This Kizong 4 has a cover 8 for accident prevention and dustproofing.
is covered.

The cover 8 is fixed to the casing 4 with mounting bolts 9 after the planetary roller 2 is attached, and a bearing 12 is interposed to ensure smooth rotation.

The planetary roller 2 is rotatably attached via a bearing 6 to a support shaft 5 which has two parallel planes cut out at both ends.
By fitting this support shaft 5 into the carrier 7 m, it is supported so as to be movable in the radial direction.

The engagement between the groove m of the carrier 7 and the cutout portion of the support shaft 5 prevents axial movement.

Furthermore, rings 14 are fitted to both ends of the support shafts 5 to inscribe each support shaft 5 (internal contact point Q).

This ring 14 has an inner diameter Di that creates a negative gap including O (meaning press fit) between the ring 14 and the support shaft 5 when the planetary roller 2 is press fit between the inner roller 3 and the sun roller 1. It is said to be the size.

Preferably, the gap is O.

The occurrence of a positive gap must be avoided since the existence of this ring 14 will be diminished.

This ring 14 is prevented from coming off during rotation by a retaining ring 15.

In this way, in the present invention, rings 14 are fitted to both ends of the spindles 5 of the planetary roller 2 to inscribe each spindle 5 at the same time.
4. Planetary roller 2° bearing when rotating by 6. ! , - and the support shaft 5, the increase in pressing force on the pressing surface between the inner roller 3 and the planetary roller 2 due to the centrifugal force during high-speed rotation is reduced.

On the other hand, it is possible to prevent a reduction in the pressing force applied to the pressing surface between the planetary roller 2 and the sun roller 1.

Therefore, compared to the conventional rolling transmission type planetary roller device, the durability of the pressure contact surface between the planetary roller 2 and the inner roller 3 is improved, and the rolling transmission force on the pressure contact surface between the planetary roller 2 and the sun roller 1 is reduced. reduction can be achieved.

In particular, a ring 1 whose button gap at the internal contact point Q is O.
4, the centrifugal force F acting on the support shaft 5 is supported at point Q of the ring 14, so the centrifugal force F of the support shaft 5 does not act on the bearing 6, and the bearing 6 The durability of the material is improved.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing a conventional rolling transmission type planetary roller device.
-X arrow sectional view. 3 and 4 are diagrams showing the rolling transmission type planetary roller device of the present invention, FIG. 3 being a half-cut sectional view taken along the center, and FIG. 4 being a sectional view taken along the Y--Y arrow. In the drawing, 1 is a sun roller, 2 is a planetary roller, 3 is an inner roller, 4 is a casing, 5 is a spindle of the planetary roller, 6 is a bearing of the planetary roller, I is a carrier, 14 is a ring, 15 is a retaining ring, m is the groove of the carrier, and Q is the internal contact point of the ring.

Claims (1)

[Scope of utility model registration request] Rotation is transmitted between the sun roller and the carrier by interposing a plurality of planetary rollers movably mounted in a radial direction on a carrier coaxial with the sun roller between the sun roller and an inner roller surrounding the sun roller. In a rolling transmission type planetary roller device intended for rotation, rings are fitted to both ends of the spindles of the planetary rollers, which are mounted in line with the carrier so as to be movable in the radial direction. 1. A rolling transmission type planetary roller device, characterized in that the centrifugal force acting on a roller or the like is supported by the ring.