RU2292503C1 - Planet gear - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: planet gear comprises solar pinion (1), satellites (2), bearing ring (6) of satellites, unmovable central wheel (4) with shortened inner teeth, and low-speed central wheel (7) with teeth-cross-pieces. Slider bearings (5) of the low-speed wheel are made of two wheels with inner teeth. The thickness of the slider bearings corresponds to the width of the hollows of teeth-cross-pieces of the low-speed wheel. The bearings are mounted on the low-speed wheel at sites where the wheel teeth-cross-pieces are secured to the rims.

EFFECT: reduced axial sizes.

2 dwg

Description

The invention relates to the field of engineering, in particular to gear mechanical gears, and can be used in all sectors of the economy.

Known planetary gear transmission containing the leading sun gear, satellites, the axis of the satellites, bearing units, carrier and fixed central wheel with internal teeth [1].

Its disadvantages are the complexity of manufacturing a low-tech carrier and high cost due to the presence of a large number of satellite bearings.

A driveless planetary gear train is also known, comprising a leading sun gear shaft, satellites, satellite axles, a support ring of the satellites, a fixed central wheel with shortened internal teeth, and a slow-moving central wheel with jumper teeth mounted on plain bearings made in the form of simple cylindrical rings [2] (prototype).

Its disadvantages are increased axial dimensions, which is due to the location of the sliding bearings on the outer cylindrical rims of the low-speed central wheel and the low transmission load capacity due to the low bending strength of the jumper teeth.

The aim of the invention is to reduce the axial dimensions and increase the load capacity of the planetless gearless drive.

This goal is achieved by the fact that in the transmission containing the sun gear, the satellites, the axis of the satellites, the support ring of the satellites, the central wheel with shortened internal teeth and the low-speed central wheel with jumper teeth, the sliding bearings of the low-speed wheel are made in the form of two wheels with internal teeth, the thickness of which corresponds to the width of the depressions of the jumper teeth of the low-speed wheel, and are mounted on the low-speed wheel at the junction of its jumper teeth with the rims.

The reduction in axial dimensions is achieved by installing plain bearings directly in the troughs of the jumper teeth of the low-speed central wheel.

An increase in the transmission load capacity is achieved by increasing the bending strength of the jumper teeth when filling the non-working part of all the troughs of the jumper teeth with a strong sliding bearing material.

The essence of the technical solution is illustrated by drawings, where in Fig.1 shows a General view of the transmission in section, in Fig.2 - section along aa in Fig.1.

The transmission contains a sun gear 1, satellites 2, axles of the satellites 3, a fixed central wheel with shortened internal teeth 4, a sliding bearing 5, a support ring of the satellites 6, a low-speed central wheel with internal teeth-jumpers 7.

The low-speed central wheel 7 is installed in the stationary central wheel 4 by means of two plain bearings 5, which are mounted symmetrically on both sides with internal grooves directly on the jumper teeth of the low-speed wheel.

The transfer works as follows.

Rotational movement is transmitted from the sun gear 1 to the satellites 2, and through them through the fixed central wheel with shortened internal teeth 4 to the low-speed central wheel with internal jumper teeth 7. Since the low-speed central wheel 7 is supported on the fixed central wheel 4 by means of sliding bearings 5, the internal supporting elements of which are located in the hollows between the jumper teeth, the transmission has smaller axial dimensions, the deflection of the jumper teeth is reduced, which increases their flexural strength and increases the load carrying capacity of the transmission as a whole.

Information sources

1. Kudryavtsev V.N. Planetary gears. - 2nd ed., Revised. and add. - L.: Mechanical Engineering, 1966.

2. Plekhanov FI, Efimov IN, et al. Combined planetary gear. Pat. RF №2169869, IPC F 16 H 1/46. - No. 99122540/28. Application 10/26/1999, Publ. 06/27/2001. - BI No. 18.

Claims (1)

An irrigated planetary gear comprising a sun gear, satellites, a fixed central wheel with shortened internal teeth, a low-speed central wheel with jumper teeth and sliding bearings, characterized in that the low-speed wheel bearings are made in the form of two wheels with internal teeth, the thickness of which corresponds to the width depressions of the jumper teeth of the low-speed wheel, and mounted on the low-speed wheel at the junction of its jumper teeth with rims.

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