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Three-level planetary gear train automatic transmission

An automatic transmission, three-stage planetary technology, applied in the field of vehicle transmission, can solve the problems of reducing the size and mass of the transmission, and achieve the effects of reducing the size and mass, reducing the speed ratio interval, and expanding the speed ratio range

Active Publication Date: 2017-09-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0002] In order to improve the power, economy and shifting performance of the vehicle, increase the number of gears, expand the range of speed ratios, and reduce the interval of speed ratios, the existing transmissions have achieved some purposes, but basically they all reduce the size and quality of the transmissions. , can not fundamentally solve such problems, so this field needs to study a low-cost, compact, multi-gear automatic transmission with new structure

Method used

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  • Three-level planetary gear train automatic transmission
  • Three-level planetary gear train automatic transmission
  • Three-level planetary gear train automatic transmission

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. .

[0028] figure 1 It is the arrangement and connection of each component of the three-stage planetary gear automatic transmission of the present invention in the form of a lever diagram. The transmission includes a housing (17), a first planetary gear set (100), a second planetary gear set (200 ) and the third planetary gear set (300), input shaft (15), output shaft (16), first clutch (9), second clutch (10), third clutch (11) and fourth clutch (12) And the first brake (13) and the second brake (14).

[0029] The first planetary gear set (100) is a single planetary gear, which includes the first ring g...

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Abstract

The invention discloses a three-level planetaryary gear train automatic transmission for a vehicle. The transmission can achieve eight forward gears and one reverse gear and comprises a shell, three planetary gear sets, a plurality of transmission shafts and six combining elements. Each planetary gear set comprises a sun wheel, a planetary wheel and a tooth ring. The two planetary gear sets on the two sides are single-planetary-gear planetary gear sets, and the middle planetary gear set is a double-planetary-gear planetary gear set. The combining elements are selectively combined and separated in the gear shifting process to achieve different transmission ratios, and accordingly the transmission can achieve the eight forward gears and one reverse gear. The two planetary gear sets share one planetary gear, mutual cooperation of the six combining elements is utilized, excessive combining elements are not needed, the gear shifting performance is improved, the mass and the size of the transmission are reduced, and the dynamic property and the transmission efficiency of the transmission are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle transmission, and in particular relates to an eight-speed planetary gear transmission. Background technique [0002] In order to improve the power, economy and shifting performance of the vehicle, increase the number of gears, expand the range of speed ratios, and reduce the interval of speed ratios, the existing transmissions have achieved some purposes, but basically they all reduce the size and quality of the transmissions. , can not fundamentally solve this kind of problem, so this field needs to research a kind of low-cost, compact, multi-speed automatic transmission with new structure. Contents of the invention [0003] The object of the present invention is to provide a three-stage planetary gear train eight-speed automatic transmission for vehicles, which uses three planetary rows and fewer coupling elements, and the coupling elements are selectively combined and separated during the gea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/006F16H2200/201F16H2200/2046
Inventor 李翔晟叶文单外平
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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