Automatic transmission with planetary gear mechanism

A technology for automatic transmissions and planetary gears, applied in gear transmissions, elements with teeth, belts/chains/gears, etc., can solve the problem of difficult number of parts, simplify the structure and improve the reduction effect
CN101839313AInactive Publication Date: 2010-09-22HONDA MOTOR CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
HONDA MOTOR CO LTD
Publication Date
2010-09-22
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The present invention provides an automatic transmission. In the automatic transmission which comprises a plurality of speed changing units comprising planetary gear mechanisms, the cost can be reduced based on the reduction of the number of components. Furthermore, a noise reduction effect based on engagement sound can be obtained. In the transmission (M), the engagement parts (H1, H2) of the planetary gear mechanisms (P1, P2) are accommodated in a gear chamber (19) which is composed of the following components: pushing components (75, 175) of clutches (70, 170) which are spaced from each other in the axial direction, outer shafts (45b, 146) of two planetary gear carriers (40, 140) and the outer component (T) of unidirectional clutches (80, 180), which form a peripheral wall that extendsin the axial direction. The gear side wall (54) of the pushing component (75) and an annular gear (50) and the gear side wall (133) of the pushing component (175) and a central gear (130) respectively form a double-layer wall in an axial range comprising two engagement parts (H1, H2) when observed from the axial direction.
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Description

technical field

[0001] The present invention relates to an automatic transmission equipped with a planetary gear mechanism, which is mounted on, for example, a vehicle. Background technique

[0002] There is known an automatic transmission having a plurality of transmission units each having a planetary gear mechanism and a transmission ratio control mechanism for controlling a transmission ratio according to the rotational speed of an input shaft. (For example, refer to Patent Documents 1 to 3)

[0003] Patent Document 1: Specification of US Patent No. 5514043

[0004] Patent Document 2: Japanese Patent Laid-Open No. 2001-165250

[0005] Patent Document 3: Japanese Patent Laid-Open No. 2000-283251

[0006] In an automatic transmission having a plurality of planetary gear mechanisms, since a plurality of gears are always meshed in the planetary gear mechanisms of each transmission unit, the noise generated by the automatic transmission becomes louder due to the meshing no...

Claims

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