RU2110713C1 - Planetary reduction gear - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: inner part of housing is provided with three mounting holes: first hole is used for receiving the crown wheel and second and third holes are used for mounting the low-speed shaft in rolling-contact bearings. Sun gear wheel is secured in inner cylindrical bore of low-speed shaft at the end. End portion of low-speed shaft is made in form of bowl with axle secured in its bottom. One end rolling-contact bearing of carrier with satellites is mounted on this axle. Other rolling-contact bearing is received by inner bore at end of housing. Drive shaft is mounted inside carrier on rolling-contact bearings without fastening screws and flange caps. Carrier is made in form of individual assembly unit articulated with other members of mechanism by means of flange of housing through rolling-contact bearing of carrier. EFFECT: enhanced reliability and kinematic accuracy; compactness of reduction gear. 1 dwg

Description

 The invention relates to mechanical engineering, in particular to gear manufacturing, and can be used in any sector of the national economy as a transmission mechanism for general engineering use. The proposed planetary gear (c. 3K) with two internal gears is compact. It is used in powerful and low-power drives under any operating conditions and allows gear ratios in a very wide range.

 The proposed transmission scheme is the creation of a new single series of small-class gearboxes.

 The closest analogue to the proposed gearbox is the transmission according to the application N 92-011484 / 28 (054534) from 12/04/94. This transmission is taken as a prototype.

 The device adopted as a prototype is less reliable in terms of kinematic accuracy of transmission, since the kinematic connection of the second rolling bearing of the low-speed shaft with the housing is made through a carrier with two rolling bearings, which also provides relative motion of two kinematic pairs.

 These shortcomings are eliminated in the proposed technical solution.

 The purpose of the invention is improving reliability, kinematic accuracy and ensuring the compactness of the gearbox. This goal is achieved by the fact that the inner part of the housing is made with three stepped landing holes, a crown wheel is installed in the first one, and a low-speed shaft is installed on the swing bearings, in which the sun wheel is fixed (made) in the inner cylindrical bore, and in the bottom of the bowl along the shaft axis, an axis is fixed (made) on which one end rolling support of the carrier with satellites is placed, and the other in the inner bore at the end of the gear housing, the drive shaft is installed in utri carrier on supports of the rolling without mounting bolts and flange caps, wherein the carrier is designed as a separate assembly unit which articulates with the other parts of the mechanism by means of rolling through a support body flange "carrier".

 The drawing shows a kinematic diagram of the gearbox.

 The proposed gearbox comprises a housing 1, in which a low-speed shaft 4 is installed on the rolling bearings 2 and 3, including the sun wheel 5 and the axis 6, which can be made integral with the low-speed shaft 4. moreover, a carrier 9 with blocks is installed on the rolling bearings 7 and 8 satellites 10. In addition, the drive shaft 11 is installed inside the carrier 9 on the rolling bearings 12 and 13 without mounting screws and flange covers. A castellated wheel 14 is also installed and fixed in the housing 1. Here the carrier 9 is made in the form of a separate assembly unit, which is articulated with other links of the mechanism through the flange 15, housing 1, through the rolling support 8.

 The gearbox operates as follows.

 Torque, for example from an electric motor (not shown), is transmitted by the drive shaft 11 through the castellated wheel 14 to the satellite blocks 10 and the carrier 9, which together, but in different directions, make radial movements, one of which is transmitted to the solar wheel by the second gear ring of the satellite 10 5, and therefore, the low-speed shaft — the output shaft 4.

 This embodiment of the gearbox increases its reliability, torsional rigidity of the carrier, kinematic accuracy and provides compactness.

 On the filing date of the application, a technical project was developed, calculations of the base case were completed.

Claims (1)

 A planetary gearbox containing a housing, a low-speed shaft placed on it on rolling bearings, the end part of which is made in the form of a bowl, a carrier with satellites, a solar and crown wheels, one of which is mounted on a low-speed shaft, and the other in the housing, and the drive shaft, characterized in that the inner part of the housing is made with three stepped landing holes, in the first of which a crown wheel is installed, and in the second and third on the rolling bearings there is a low-speed shaft, in the inner cylindrical bore of which Ortsa has a sun wheel fixed, an axis is fixed along the shaft axis on the axis of the shaft, on which there is one end carrier of the carrier with satellites, and the other in the inner bore at the end of the body, and the drive shaft is mounted inside the carrier on the bearings without mounting screws and flange covers , while the carrier is made in the form of a separate assembly unit, which is articulated with other parts of the mechanism through the housing flange through the carrier of the carrier.