RU2125193C1 - High-power planetary minireduction gear - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: satellites of planetary reduction gear form satellite modular units. Each modular unit has splined shaft with spacer bush, two single-rim satellites, two thrust rings and two rolling-contact bearings closed by two compensating bushes. Cylindrical body of carrier is closed by means of two end flanges and is articulated with other members of reduction gear by means of two rolling-contact bearings. Modular satellite units are mounted in radially coaxial through locating holes of body. Rectangular holes of carrier body arranged in staggered order are used for mounting the satellites. Central locating hole of carrier is used for mounting the drive shaft with sun gear wheel. length of teeth of sun and crown gear wheels is increased by sum of multirows of satellites. Such arrangement of reduction gear increases number of planetary rows in axial direction of reduction gear. EFFECT: increased number of planetary rows; increased single-unit engagement power. 2 cl, 3 dwg

Description

 The invention relates to the field of engineering, in particular to gear manufacturing, and can be used in all industries as a high-power power transmission mechanism of a new mini-class, general engineering applications, with the release of large, medium and small types of gearboxes.

 The proposed planetary gear with a "ZK" scheme with two internal gears is used for the first time in powerful and low-power drives under any operating conditions and allows gear ratios to be implemented in a very wide range, taking into account the solution to the problem of insufficient torsional rigidity of the carrier.

 The closest analogue to the proposed gearbox is a transmission according to the application FR N 2438205 from 30.04.80, cl. F. 16 H 1/28. This transfer is accepted by the author as a prototype. The device adopted as a prototype allows only one planetary row of satellites in the circumferential plane to be placed in each crown (first second stage), here the number of satellites, as a rule, does not exceed a three-row three-stream transmission. Therefore, the transmitted power of this gear, associated with the conditions of the neighborhood between the satellites, as well as the fact that each individual gearing has its own power limits, is limited. These restrictions are eliminated in the proposed technical solution.

 Object of the invention: increasing the unit transmitted power in gearing of the gearbox. It is achieved by the fact that in 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, the other in the housing , and drive shaft.

 According to the invention, the satellites form modular satellite blocks, each of which includes a spline shaft with a spacer sleeve, two single-axis satellites, two thrust rings and two rolling bearings, closed by two compensation bushings, the carrier body is made of a cylindrical shape with radially coaxial through holes, in which mounted modular satellite blocks, and rectangular holes arranged in a checkerboard pattern for installing satellites, as well as with a central landing hole, in which the drive shaft is placed and closed by two end flanges, one of which is made with an axis, and articulated with other links of the gearbox by two rolling bearings, one of which is mounted on the axis of the end flange and articulated with a low-speed shaft, the other with the body, and the length of the teeth of the sun and crown wheels increased by the sum of the installed multi-row satellites, in addition, each modular satellite block is mounted in a radially-coaxial through hole of the carrier’s housing with the possibility of stepwise parallel-axial displacement from ositelno each other, wherein the satellites are placed at a radially coaxial through holes landing conditions given neighborhood so that their teeth do not touch the walls of said holes.

The invention is illustrated by drawings, where in FIG. 1 - shows a longitudinal section of the gearbox with the number of satellite holes - 6;
in FIG. 2- shows a cross section of the gearbox, along the first and second stages of the satellites;
in FIG. 3 - shows a diagram - a scan of the "carrier" body - multi-row arrangement of "modular satellite blocks", multi-threaded gear transmission.

 The proposed gearbox will contain the housing 1, in which the shaft 4 is mounted on the rolling bearings 2 and 3, the main wheel 5 is fixed (made) on the inner surface. The main wheel 6 and the carrier body 7 with the bearings 8 are also mounted and fixed 9 rolling elements, one of which is articulated with an end axial bore - an aperture of a low-speed shaft, the other - with a housing 1.

 In this case, the drive shaft 10 with the sun wheel 11 is mounted on the rolling cage 12 and 13 in the central through hole of the carrier body 7, and in each radially coaxial through hole is mounted a modular satellite block 14 with the possibility of its stepwise parallel-axial displacement relative to each other on the bearings 15 and 16, which are closed by two end flanges 17 and 18. The gearbox is closed by the flange 19 of the housing 1 through the rolling support 9. The gearbox operates as follows. Torque, for example from an electric motor (not shown in the drawing), is transmitted by the drive shaft 10 through the sun wheel 11, the crown wheel 6 to the “modular satellite block” 14 with two identical satellites and the carrier body 7, which together, but in different directions, make radial movements, one of which - the second gear ring of the modular satellite unit 14 - is transmitted to the crown wheel 5 and, therefore, low-speed shaft 4.

 This embodiment of the gearbox increases “n” times the number of planetary gears in the axial direction and increases the transmitted power by the same amount without changing the gear diameter and gear speed.

Claims (2)

 1. A planetary gearbox comprising 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, the other in the housing, and a drive shaft characterized in that the satellites form modular satellite blocks, each of which includes a spline shaft with a spacer sleeve, two identical satellites, two thrust rings and two rolling bearings, closed by two compensation bushings, the carrier body is made cyl one with radial-coaxial through-hole mounting holes in which the modular satellite blocks are mounted, and rectangular holes arranged in a staggered pattern for installing satellites, as well as with a central landing hole in which the drive shaft is placed and closed with two end flanges, one of which is made with an axis and articulated with other links of the gearbox by two rolling bearings, one of which is mounted on the axis of the end flange and articulated with a low-speed shaft, the other with the housing, and the length of the solar and crown wheels increased by the sum of the established multi-row satellites.  2. The gearbox according to claim 1, characterized in that each modular satellite unit is mounted in a radially coaxial through hole of the carrier body with the possibility of stepwise axial displacement relative to each other, while the satellites are placed in radially coaxial through holes of the carrier neighborhood conditions so that they do not touch the walls of the said openings with their teeth.

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