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Multi-speed gearbox

A technology of transmission and automatic transmission, which is applied in the direction of vehicle gearbox, multi-gear ratio transmission device, transmission device, etc., can solve the problem of structural consumption of transmission components, and achieve the effect of achieving driving comfort, good efficiency and reducing structural consumption.

Inactive Publication Date: 2015-02-04
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In transmission configurations with a large number of gears, the problem arises that the number of transmission components and thus the structural complexity increases dramatically depending on the number of gears

Method used

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Embodiment Construction

[0021] exist figure 1 shows a multi-stage transmission according to the invention, which comprises a drive shaft 1 , a driven shaft 2 and four planetary gearsets P1 , P2 , P3 and P4 which are arranged in a housing G. Planetary gear sets P1, P2, P3, P4 are in figure 1 The example shown is configured as a negative planetary gear set. According to the invention, at least one of the planetary gear sets P1, P2, P3, P4 can be configured as a positive ratio planetary gear set, if the planet carrier connection and the ring gear connection are replaced at the same time and the value of the gear train transmission ratio is fixed If it is increased by 1 compared with the embodiment as a planetary gear set with a negative gear ratio.

[0022] In the illustrated embodiment, each planetary gear set P1, P2, P3, P4 is viewed axially as a first planetary gear set P1, a second planetary gear set P2, a third planetary gear set P3, a fourth planetary gear set P4 order settings. According to t...

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Abstract

The invention relates to a multi-speed gearbox having four planetary gear sets (P1, P2, P3, P4), eight rotatable shafts (1, 2, 3, 4, 5, 6, 7, 8) and six shift elements (03, 04, 37, 57, 58, 68), wherein the sun gear of the first planetary gear set (P1) is connected to the seventh shaft (7), which can be connected to the third shaft (3) by means of a first clutch (37), which connects to the sun gear of the second planetary gear set (P2), to the planet carrier of the third planetary gear set (P3) and can be coupled to the housing (G) by means of a first brake (03). The seventh shaft (7) can be connected to the fifth shaft (5) by means of a second clutch (57), which connects to the planet carrier of the third planetary gear set (P3) and can be coupled to the eighth shaft (8) which is connected to the planet carrier of the second planetary gear set (P2) by means of a third clutch (58), which can be connected to the sixth shaft (6) which is connected to the sun gear of the third planetary gear set (P3) and to the sun gear of the fourth planetary gear set (P4) by means of a fourth clutch (68). The input shaft (1) is connected to the planet carrier of the first planetary gear set (P1) and to the ring gear of the second planetary gear set (P2) and the fourth shaft (4) connected to the ring gear of the fourth planetary gear set (P4) can be coupled by means of a second brake (04) to the housing (G) and the output shaft (2) is connected to the ring gear of the first planetary gear set (P1) and to the planet carrier of the fourth planetary gear set (P4).

Description

technical field [0001] The invention relates to a multi-stage transmission of planetary gear design according to the preamble of claim 1 , in particular an automatic transmission for motor vehicles. Background technique [0002] According to the prior art, automatic transmissions, in particular automatic transmissions for motor vehicles, comprise a plurality of planetary gearsets which are shifted by means of friction elements or shifting elements, such as clutches and brakes, and which are usually connected to slipping and selectable It is connected to a starting element, such as a torque converter or a fluid coupling, which is optionally equipped with a clutch. [0003] Generally speaking, vehicle transmissions of automatically shiftable planetary gear design have already been described extensively in the prior art and are constantly being further developed and improved. These transmissions should require low structural outlay, especially a small number of shifting elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H2200/2046F16H2200/2064F16H3/66F16H2200/2012F16H2200/2094F16H2200/0073F16H2200/0082
Inventor S·贝克C·西布拉W·里格尔
Owner ZF FRIEDRICHSHAFEN AG
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