RU-220622-U1 - Compound internal gear

RU220622U1RU 220622 U1RU220622 U1RU 220622U1RU-220622-U1

Abstract

The utility model relates to mechanical engineering, namely to internal gears, mainly used in planetary gears. It can be in demand in power gearboxes for various purposes. A composite internal gear wheel containing a housing 1, individual gear disks 2 floating relative to it in the axial and circumferential directions, intermediate plates 3 located between these disks, as well as a pressure device that performs axial compression of the system of gear wheels and intermediate rings, characterized in that that the inner part of the body has a square cross-section, the outer contour of the intermediate plates corresponds to the square cross-section of the body, and the pressure device consists of end plates 4 (one of which is fixedly connected to the body), tightened with bolts or studs 5 running in the corners of the square. The achieved technical result is a reduction in the labor intensity of manufacturing an epicyclic gear of a multi-row planetary gear.

Inventors

Волков Глеб Юрьевич
Безгодов Константин Вячеславович
Пестерев Иван Алексеевич

Dates

Publication Date: 20230926
Application Date: 20230614

Claims (3)

1. A composite internal gear wheel containing a housing, individual toothed disks floating relative to it in the axial and circumferential directions, intermediate plates located between these disks, as well as a pressure device that carries out axial compression of the system of gear wheels and intermediate rings, characterized in that that the inner part of the body has a square cross-section, the outer contour of the intermediate plates corresponds to the square cross-section of the body, and the pressing device consists of end plates tightened with pins running in the corners of the square.
2. The wheel according to claim 1, characterized in that the toothed disks are in contact with all four inner sides of the square body.
3. Wheel according to claims 1 and 2, characterized in that one of the end plates is fixedly connected to the body.

Description

The utility model relates to mechanical engineering, namely to internal gears, mainly used in planetary gears. It can be in demand in power gearboxes for various purposes. Gear wheels of gearboxes, including planetary ones, are usually made monolithic [Kudryavtsev V.N. Planetary gears. M-L “Mechanical Engineering” 1966, p. 236]. For given dimensions, the load capacity of gears with such wheels is limited by the actual length of the tooth contact zone in the axial direction. A simple increase in the width of the gear, that is, an increase in the length of the tooth, does not provide an increase in the load capacity of the transmission due to misalignment of the tooth axes due to inaccuracy in manufacturing and deformation of the gearbox parts. There are known technical solutions that ensure the distribution of the tooth contact zone along the entire length of the wheel, regardless of its axial size - these are composite wheels assembled from individual rings or disks. In a multi-row planetary gear [Pat. 2424458 RF] the epicyclic wheel consists of narrow rims with internal teeth, which are installed in the gear housing on split conical rings. Axial compression of the rims together with the conical rings provides frictional forces that keep the rims from rotating relative to the body. At the same time, the gear rims, which, due to inaccuracy in manufacturing and deformation of parts, were loaded with torque more than others, overcoming frictional forces and rotate. As a result, other gear rims are also loaded. The disadvantage of this transmission is the difficulty of manufacturing parts with conical base surfaces. In the planetary gear [A.s. 1216494 USSR] - prototype, an epicyclic gear with internal teeth is made of a cylindrical rim, separate toothed disks floating relative to it in the axial and circumferential directions, intermediate rings located between these disks, as well as a spring-type pressure device that carries out axial compression of the system gears and intermediate rings. The intermediate rings have flat end surfaces for frictional interaction with the toothed discs and are connected to the rim by a spline-like connection that allows only axial movement. Design disadvantage: technological difficulty in manufacturing splines or keyways on the inner surface of the rim (body) The utility model is based on the task of increasing the manufacturability of a composite internal gear gear. The achieved technical result is a reduction in the labor intensity of manufacturing an epicyclic gear of a multi-row planetary gear. The problem is solved by the fact that in a composite internal gear wheel containing a housing, individual gear disks floating relative to it in the axial and circumferential directions, intermediate plates located between these disks, as well as a pressure device that carries out axial compression of the system of gear wheels and intermediate plates, the inner part of the body has a square cross-section, the outer contour of the intermediate plates corresponds to the square cross-section of the body, and the pressing device consists of end plates tightened with bolts or studs running in the corners of the square. The technical result is ensured by the fact that the wheel housing, which is a square tube, is much simpler and cheaper to manufacture than a housing with splines on the inner cylindrical surface. Further simplification of the design is achieved by the fact that the toothed disks are in contact with all four internal sides of the square body, and one of the end plates is fixedly connected to the body. Thanks to these design features, the issue of radial and axial basing of the gear disk system is resolved. The utility model is illustrated by drawings: fig. 1 - compound internal gear; fig. 2 - its section along A-A; fig. 3 - toothed disk; fig. 4 - intermediate plate. The compound gear (Fig. 1-3) contains a housing 1, the inner part of which has a square cross-section. Toothed disks 2 are in contact with all four internal sides of the housing 1; they have freedom of axial movement and rotation relative to the axis of the housing. Between the gear disks 2 there are intermediate plates 3, the outer contour of which corresponds to the square section of the housing 1, and the internal contour is a circle with a diameter close to the diameter of the cavities of the gear rim of the disk 2. The end plates 4, one of which is fixedly connected to the housing 1, are tightened with pins 5 , passing in the corners of the square. When the gear train, which includes the proposed compound wheel, operates, one of the disks 2 is the first to interact with the mating gear. The friction forces arising along the planes of contact of this disk with the intermediate plates 3 turn out to be insufficient, and the disk rotates relative to the body at a certain angle. As a result, the following disks 2 are connected to the transmission of torque. The adjustment of the axial force, which ensures compre