Automatic transmission

An automatic transmission, free technology, applied in the direction of vehicle gearbox, transmission element, transmission device, etc., can solve the problems of deterioration of transmission efficiency and large friction loss, to improve the freedom of configuration and design, reduce friction loss, improve Effects of setting degrees of freedom

Active Publication Date: 2010-12-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the friction loss caused by the drag of the remaining four engaged mechanisms that have been released is large, and there is a disadvantage that the efficiency of the transmission deteriorates.

Method used

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Embodiment Construction

[0027] figure 1 The first embodiment of the automatic transmission of the present invention is shown. The automatic transmission of the first embodiment has an input shaft 2 and an output shaft 3. The input shaft 2 is rotatably supported in the transmission case 1 and is connected to a power source such as an engine (not shown in the figure). 3 is arranged parallel to the input shaft 2. The rotation of the output shaft 3 is transmitted to left and right drive wheels of the vehicle via a differential gear, a propeller shaft, and the like not shown in the figure.

[0028] Furthermore, in the transmission case 1 , the first planetary gear mechanism 4 , the second planetary gear mechanism 5 , and the third planetary gear mechanism 6 are arranged concentrically with the input shaft 2 . The first planetary gear mechanism 4 is composed of a single planetary gear type planetary gear mechanism, which is composed of a sun gear Sa, a ring gear Ra, and a carrier Ca. The carrier Ca is co...

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Abstract

Provided is an automatic transmission capable of reducing friction loss. A first element (Sa) is coupled with an input shaft (2), a second element Ca is coupled with a first driving gear (G1a). A first driven gear (G1b) is pivotally supported on an output shaft (3), a seventh element (Rc) is coupled with a second driving gear (G2a), and a second driven gear (G2b) is fixed to the output shaft (3).A third element (Ra) and a fifth element (Cb) are coupled to form a first coupling body, a sixth element (Rb) and a ninth element (Sc) are coupled to form a second coupling body. The automatic transmission includes a first engagement mechanism (C1) coupling the input shaft (2) and the eight element (Cc) releasably, a second engagement (C2) fixing the first driven gear (G1b) to the output shaft (3) releasably, a third engagement mechanism (C3) coupling the second element (Ca) with the second coupling body releasably, and a fourth to a sixth engagement mechanisms (B1 to B3) fixing respectively the first coupling body, a fourth element (Sb) and the eighth element (Cc) to a transmission case (1) releasably.

Description

technical field [0001] The present invention relates to an automatic transmission that transmits the rotation of an input shaft to an output shaft through multiple gears through a plurality of planetary gear mechanisms arranged in a transmission case. Background technique [0002] Conventionally, there is known an automatic transmission capable of shifting to eight forward speeds using a first planetary gear for input, two planetary gears for shifting, and six engagement mechanisms (for example, refer to Patent Document 1). [0003] In the automatic transmission of Patent Document 1, the first planetary gear for input is constituted by a double-planetary planetary gear mechanism consisting of a first sun gear, a first ring gear, and a first planetary gear mechanism. In this way, the first carrier supports a pair of first pinion gears meshing with each other, one of which meshes with the first sun gear and the other meshes with the first ring gear, so as to freely rotate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H37/042F16H2200/2046F16H3/666F16H2200/2048F16H2200/201F16H2200/006
Inventor 杉野聪一
Owner HONDA MOTOR CO LTD
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