JPS5813245A - Load equalizing distributor for planetary gear - Google Patents

Abstract

PURPOSE:To make equalized distribution of a load reliable, by absorbing deformation occurred resulting from dimensional error of every component by installing a flexible plate between an output shaft and a carrier, in a planetary type gear. CONSTITUTION:One or a plurality of disklike flexible plates 5 having an appropriate elasticity which are in layers are installed between an output shaft 2 supported by a casing 9 through an output shaft bearing 7 and a carrier 8. With this, an allotted load applicable to each of teeth surfaces is equalized and equal load distribution becomes reliable, by absorbing deformation through elastic deformation of the flexible plate 5 when the deformation is occurred on each of the teeth due to various kinds of dimensional errors to be generated at their production time and assembling time of every component.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for uniformly applying loads to gears that transmit rotation and power in a planetary planetary gear system.

□□□, yo-ヮ9゜. Ya□. ;□ A plurality of planetary gears are meshed between a twisted sun gear and an internal gear arranged concentrically with the sun gear, and the rotation of the sun gear, which is directly connected to the input shaft, is transmitted to each planetary gear. As the planetary gear rotates, it also rolls on the inner circumference of the internal gear fixed to the casing, and at the same time works in conjunction with the carrier that pivotally supports the planetary gear, causing the carrier to rotate and transmitting the rotation to the output shaft. This is a device that reduces the rotational speed of the input shaft according to the gear ratio of each of the gears, extracts the required rotational speed to the output shaft, and transmits power. In some cases, the load may not be applied evenly during operation due to individual pitch errors, errors in manufacturing and assembly such as mutual center distance and parallelism, temperature changes, and other causes. Noise and vibration may be generated, or accidents such as bearing seizure or gear breakage may occur.

In order to prevent these accidents, the most effective way to prevent these accidents is to create a structure that applies the load evenly to each gear during operation of the planetary gear system. There are known methods such as using a sleeve spring or a sleeve spring, but those with a simple structure do not have a reliable and reliable load distribution, and those with a good load distribution have a complicated structure. However, it has the disadvantage of being difficult to assemble and disassemble.

In order to solve the above-mentioned drawbacks of the conventional art, the present invention has a simple structure, can be easily assembled and dismantled, and has a disc-shaped flexible plate having appropriate elasticity between the output shaft supported by the casing and the carrier. By attaching the flexible plate to the flexible plate, the elastic deformation of the flexible plate absorbs the deformation caused by various errors in manufacturing and assembling the sun gear, planetary gear, internal gear, casing, etc., and the tooth surface of each gear The present invention is characterized in that the load applied to the gear is made uniform and the load is evenly distributed.Hereinafter, the present invention will be explained with reference to FIGS. 1 and 2 regarding a planetary type planetary gear device.

FIG. 7 is a longitudinal cross-sectional view of a planetary type planetary gear device according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view taken along line I-I in FIG. The internal gear is fixed to the inner surface of the casing with fastening fittings such as bolts, and the external teeth of the sun gear G/) placed in the center of the internal gear are connected to the internal gear. A plurality of planetary gears (3) (3 in the example) are meshed with each other, and the planetary gears (3) rotate with the sun gear C/). The output shaft (2) is rotatably supported by a planetary gear shaft (6) on a carrier (6) that rotates concentrically, and the output shaft (2) is supported on the casing (2) via an output bearing (6).
) and the carrier V) are equipped with a disk-shaped flexible plate (j) having appropriate elasticity. The side surface of the center part is fixed to the flange part of the output shaft (2), and the side face of the outer peripheral part is fixed to the flange part of the carrier holder (carrier holder) by multiple fastening fittings such as bolts. The rotation is transmitted to each planetary gear (3), and the planetary gear (3) rotates and rolls on the inner circumference of the internal gear fixed to the casing, and at the same time the planetary gear (3) ) The carrier (lr) is rotated in conjunction with the carrier rack supporting the shaft, and the rotation is transmitted to the output shaft (2) via the elastic deflection plate <S> of the present invention.

The above-mentioned flexible plate has a structure that allows suitable elastic deformation for load application by adjusting the shape, size, thickness, etc. of the flexible plate according to the size and transmission power of the planetary gear device. If deformation occurs in each gear due to various errors that occur during manufacturing and assembly of gears (gears), planetary gears (3), internal gears (ri), carriers (lr), casings (ri), etc. Here, these deformations are made using a flexible plate (3
) is absorbed by the elastic deformation of Cj), and the shared load on the tooth surface of each gear is equalized by the elastic deformation of the flexible plate Cj), ensuring equal load distribution, and the structure is simple. Since it is easy to assemble and disassemble, it is extremely effective as a load equalization device.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a planetary type planetary gear device showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II in FIG. 1. / : Sun gear: Output shaft 3: Planetary gear 4t: Internal gear! : Flexible plate 6 : Planetary gear shaft 7 : Output bearing groove : Carrier 9 2 Casing Fig. 1 4 Fig. 2

Claims (1)

[Claims] An internal gear (1) is fixed inside the casing (1), and rotates by contacting the external teeth of the sun gear (1) and the internal teeth of the internal gear (2) located at the center of the internal gear (2). A plurality of planetary gears/wheels (3) are meshed together, and each planetary gear (3) is rotatably supported by a planetary gear shaft (4) on a Kigiriya gear which rotates concentrically with the sun gear (4). In the planetary type planetary gear device, the output bearing (7) is attached to the casing (ri).
The output shaft (2) and the carrier (2) which are pivotally supported via
The side surface of the center of seven or more disc-shaped elastic flexible plates (3) installed between the output shaft (2) and the end face of the output shaft (2),
A load equalization device for a planetary gear device, characterized in that a side surface of an outer peripheral portion is fixed to an end surface of a carrier (Gr) to ensure equal load distribution.