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Ring gears for epicycloidal gear drive reducers, and starters including ring gears of this type
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A technology of gear transmission and ring gear, applied in the direction of starting device with mechanical power storage, starting of engine, spring/shock absorber, etc., can solve the problems of damper damage, loud noise, etc.
Inactive Publication Date: 2018-02-06
VALEO EQUIP ELECTRIC MOTEUR
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[0008] Additionally, damage to the damper results in louder noise when the vehicle is started
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[0068] In the figures, the same, similar or analogous elements are indicated by the same reference numerals.
[0069] Ring gear reference for epicycloidal gear transmission reducer according to the first embodiment of the present invention Figures 1A-1B to describe.
[0070] The ring gear comprises a housing 1 comprising an opening through the housing with a reference shaft 2 passing through the center of the opening. The housing 1 is preferably cylindrical about a reference axis 2 .
[0071] In this document, "axial" means a direction parallel to a reference axis, "radial" means a direction perpendicular to a reference axis, and "angular" means defined by a line described by a point rotated about a reference axis 2 direction.
[0072] The ring gear also includes an inner ring 3 mounted against the housing 1 . The inner ring 3 also includes an opening through which the shaft 2 passes through the center of the opening. The inner ring 3 is preferably cylindrical about a re...
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Abstract
The invention relates to an annulus gear for an epicyclic reduction gear set comprising an inner ring (3, 3') comprising internal teeth able to mesh with planet gears of the epicyclic reduction gear set. The annulus gear further comprises a housing (1, 1', 1") comprising means for securing it to a cylinder head, and at least one damping means (51, 52, 53, 71, 72, 73, 74, 51', 52', 53', 71', 72', 73', 7A, 7B, 7C) for absorbing a spike of energy between the ring (3, 3') and the casing (1, 1', 1") when the ring (3, 3') turns relative to the casing (1, 1', 1") in one direction of rotation, in which direction the ring (3, 3') is able to rotate with respect to the casing (1, 1', 1") between a rest position and a compressed position. The damping means (51, 52, 53, 71, 72, 73, 74, 51', 52', 53', 71', 72', 73', 7A, 7B, 7C) is designed to allow angular travel of at least 8 degrees with respect to the axis X between the ring (3, 3') and the casing (1, 1', 1") without damage to the ring (3, 3') or to the casing (1, 1', 1").
Description
technical field [0001] The invention relates to a ring gear for an epicycloidal gear reducer, in particular for a motor vehicle starter, and to an epicycloidal gear reducer comprising a ring gear of this type. Background technique [0002] Ring gears for epicycloidal gear transmission reducers generally comprise a substantially cylindrical housing having inserted therein an inner ring, also called an outer planet, comprising internal teeth engaging with the planets of the reducer. The inner ring is rotationally stationary relative to the housing. [0003] The epicycloidal gear reducer is subjected to so-called tangential or circumferential impacts between the teeth of the planetary wheel and the inner ring, between the housing of the ring gear and the head on which the reflective housing is fixed The shock caused by the torque. This impact reflection produces premature wear of the ring gear and thus of the epicycloidal reducer. [0004] In order to limit the tangential sh...
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