RU1772480C - Friction planet reduction gear - Google Patents

Abstract

Usage: in mechanical engineering. SUMMARY OF THE INVENTION: the device comprises central wheels, one of which is fixedly mounted in the housing, and a wheel with an external friction surface mounted on the drive shaft is made of two coaxially mounted shells, the inner of which is made of material with a lower coefficient of linear expansion than the outer shell. The latter has a barrel-shaped shape and external flanges, the contact surface under which is intended for rigid fastening to the inner shell. The satellites are made in the form of elastic rings connected to the carrier by means of elastic plates and rollers. Elastic rings are supported on the outer surfaces of the rollers. 2 ill.

Description

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The invention relates to mechanical engineering.

Known friction planetary gearbox, in which the Central wheel is mounted on the drive shaft, the satellites in the form of elastic rings are connected to the carrier by means of rollers, while on the outer friction surface of the Central wheel grooves are made, covered by each part of the inner cylindrical supporting surface of one of the elastic rings, the last the outer surface is supported on the rollers, and the gearbox is equipped with plates connecting each carrier to the roller.

The disadvantage of such a gearbox is that when the rings and the central β-wheel are worn, as well as when the load in the gearbox increases, its efficiency decreases due to slipping of the rings, rollers and the central wheel relative to each other.

The aim of the invention is to increase the efficiency of the gearbox.

This is ensured by the fact that in the friction reducer containing the central wheel, the carrier, the satellites made in the form of elastic rings are connected to the carrier by means of rollers, on which the outer rings are supported by elastic rings, and the plates connecting each carrier to the roller, the central wheel with the outer friction surface covered by part of the inner cylindrical supporting surface of the elastic rings, the Central Wheel with the outer friction surface is made of two coaxially mounted shells, the inner of which is made of a material with a lower coefficient of linear expansion than the outer shell, the latter has a barrel-shaped and outer flanges, the contact surface under which

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designed for rigid attachment to the inner shell

Figure 1 shows a friction planetary gearbox, General view; in Fig.2 - node I in Fig.1.

The central wheel with the outer friction surface is made of two coaxially mounted shells. The inner shell 1 mounted on the drive shaft 2 is made of a material with a lower coefficient of linear expansion than the outer shell 3, which has a barrel-shaped shape between the outer flanges 4, the contact surface under which is designed for rigid fastening to the inner shell 1, for example by resistance welding. The Central wheel with the outer friction surface is covered by part of the inner cylindrical supporting surface of the elastic rings 5.

The elastic plates b are fixed at one end in the axes 7 of the movable rollers 8, and at the other in the blind grooves of a rectangular section of the corresponding bushings 9 installed in the carrier body 10. The central wheel 11 is fixedly mounted in the vehicle body 12. The axis 7 of the rollers 8 is connected to the carrier 10 by the plates 6.

When the drive shaft 2 rotates, the central wheel transmits the rotation to the elastic rings 5 due to friction forces, which, in turn, transmit the rotation to the rollers 8. The latter, rolling along the inner cylindrical surface of the stationary central wheel 11, carry the axles 7 of the rollers 8 associated with the carrier 10 plates 6.

When the central wheel mounted on the drive shaft 2 is worn out, the slipping of the central wheel relative to the driven elements increases in the friction reducer, while the temperature of the central wheel and its inner 1 and outer 3 shells increase. Due to the manufacture of the outer shell 3 from a material with a larger than

shell material 2, the coefficient of linear expansion, its length between the points of attachment to the shell 1 increases, therefore, its diameter also increases, which leads to an increase in the tension in the contact of the wheel and the elastic rings of the gearbox.

Claims (1)

SUMMARY OF THE INVENTION A friction planetary gearbox comprising central wheels, a carrier and satellites made in the form of elastic rings, connected to the carrier by means of rollers on which the outer rings are supported by elastic rings, and plates connecting each carrier to the roller, the central wheel with the external friction surface is covered by a part of the inner cylindrical supporting surface of the elastic rings, characterized in In order to increase the efficiency, the central wheel with the outer friction surface is made of two coaxially mounted shells, the inner of which is made of material with a smaller coefficient of linear expansion than the outer shell, the latter having a barrel-shaped shape and outer flanges, the contact surface under which is intended for rigid fastening to the inner shell.  S //////// ////////// A S Editor T. Orlova FIG. 2 Compiled by T. Sokolova Tehred M. Morgenthal Corrector P. Gereshi Phage i