Nine-gear speed changer

A nine-speed transmission and transmission technology, applied in the field of vehicle transmission, can solve the problems of low transmission stability and small speed ratio, and achieve the effect of small modulus

Inactive Publication Date: 2015-11-25
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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Problems solved by technology

The Chinese invention application "eight-speed transmission" (application number: CN201410829472) and the Chinese invention application "CN201410826601-a transmission with a wider range of speed change" (application number: CN201110094929) both disclose a gear train consisting of four planetary gears, six An eight-speed transmission composed of a torque transmission device and four connecting members. The above two transmissions both realize eight forward gear ratios and one reverse gear ratio, but there are problems of small speed ratios and low transmission stability

Method used

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

[0029] The nine-speed transmission provided by the invention has a structure such as figure 1 As shown, it includes a transmission case 3 and an input shaft 1, an output shaft 2, a planetary gear set, a coupling member set and a torque transmission device installed inside the transmission case. The planetary gear set includes the first Planetary gear row, second planetary gear row, third planetary gear row and fourth planetary gear row, each planetary gear row consists of sun gear (14, 24, 34 and 44), planet carrier (13, 23, 33 and 43 ), planetary gears (13, 23, 33 and 43) and ring gears (12, 22, 32 and 42), wherein the planetary gears in the planetary gear row mesh with the sun gear and the ring gear through gear pairs, and the The torque transmission device includ...

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Abstract

The invention provides a nine-gear speed changer. The nine-gear speed changer mainly comprises an input shaft, an output shaft, planet gear rows, connecting members and torque transmission devices, which are all arranged in a speed changer housing, wherein each planet gear row comprises a sun gear, a planet carrier, a planet gear and a gear ring; the torque transmission devices include two clutches and four brakes; the two clutches and the four brakes are engaged selectively so as to rotate or fix the sun gears, the planet carriers, the gear rings or one of the five connecting members; the torque transmission devices can be engaged selectively in a combining form of at least two torque transmission devices so as to build the speed ratios of nine forward gears and the speed ratio of one reverse gear between the input shaft and the output shaft; and the nine forward gears include five deceleration gears, one direct gear and three overspeed gears. The speed changer provided by the invention is compact in structure, light in weight, small in size and easy to arrange on an automobile, and speed ratio steps between the transmission ratios of the gears of the speed changer meet the requirements of the speed changer.

Description

technical field [0001] The invention relates to a nine-speed transmission, which belongs to the technical field of vehicle transmission. Background technique [0002] A typical multi-speed transmission uses a combination of friction clutches, planetary gearing, and fixed interconnections to achieve multiple gear ratios. The number and physical arrangement of planetary gear sets is usually dictated by packaging, cost and desired speed ratios. While current transmissions have served their intended purpose, the need for new and improved transmission configurations is virtually constant as automobiles proliferate. [0003] The improvement of the transmission configuration mainly starts from the following two aspects. One is performance, specifically including the range of transmission ratio, responsiveness and smoothness; the other is packaging, mainly reducing size and weight. When the gear is determined, The number of components required to achieve fixed gears is determined ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/0065F16H2200/2012
Inventor 丁华锋黄鹏张琛琨蔡长旺
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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