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Dual clutch transmission of a motor vehicle

A sealing device and clutch technology, applied in the direction of transmission, transmission parts, gear transmission, etc., can solve the problems of lifting, adverse effects of sealing, complicated structure of discharge parts, etc., and achieve the effect of low cost and simple structure

Inactive Publication Date: 2009-02-11
ZF FRIEDRICHSHAFEN AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with dual clutch transmissions is that the oil chambers must also be sealed against each other directly in the radially inner drive shaft from the radially outer drive shaft in the exit area of ​​the transmission housing, because the two oil chambers are sealed against each other through the gap between the shafts. annular gap junction
[0006] The disadvantage of this is that the radial shaft seal is loaded when the outer hollow shaft rotates
This has a detrimental effect on the tightness of the setup due to centrifugal force which can cause the sealing lip to lift off the central drive shaft
In addition, the construction of drains for venting and for leak detection is rather complex

Method used

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  • Dual clutch transmission of a motor vehicle
  • Dual clutch transmission of a motor vehicle
  • Dual clutch transmission of a motor vehicle

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Embodiment Construction

[0031] FIG. 1 shows a multiple clutch transmission 1 of a motor vehicle with separate oil chambers 2 , 3 . The oil chamber 2 is configured as a clutch chamber for accommodating a wet multi-plate clutch 4 . The oil chamber 3 is designed as a transmission chamber, which accommodates the clutch transmission gear set 5 in the sense of two partial transmissions. The oil chambers 2 and 3 are surrounded by a common transmission housing 13 . The principle of operation of multiple clutch transmissions is known per se. Therefore, only the sealing device according to the invention will be described in detail below.

[0032]The oil chambers 2, 3 are separated by a partition 6 through which the two transmission shafts pass. The first transmission shaft is formed as a hollow shaft 7 , through which the second transmission shaft, which is formed as a central shaft 8 , passes coaxially. Each of the two shafts 7 and 8 is rotatably mounted and connected to the single clutch of the multiple ...

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Abstract

The invention relates to a sealing device for a dual clutch transmission (1) of a motor vehicle, comprising a transmission case (13) in which a clutch compartment (2), filled with a clutch oil, for receiving a dual clutch (4), and a transmission compartment (3), filled with a transmission oil, for receiving a dual clutch transmission gear train (5), and two drive shafts (7, 8), one coaxially received in the other, are arranged. One drive shaft (8) is configured as an internal central shaft that extends inside the transmission compartment (3) through the end of the second drive shaft (7) that is configured as an external hollow shaft. The two drive shafts (7, 8) are sealed by means of at least one seal for sealing the clutch compartment (2) from the transmission compartment (3). The aim of the invention is to provide a sealing device which is more reliable and which at the same time allows simple breathing and leakage detection. For this purpose, a receiving component (12) is arranged inside the transmission case (13) and is fixed thereto, two adjoining seals being received thereby. One seal (20) seals radially on the hollow drive shaft (7) and the other seal (19) seals radially on the central drive shaft (8).

Description

technical field [0001] The invention relates to a sealing device for a dual clutch transmission of a motor vehicle according to the preamble of claim 1 . Background technique [0002] Multiple clutch transmissions for motor vehicles have long been known. Its main advantage over conventional stepped transmissions is that the shifting process takes place with virtually no traction interruption during the shift. This avoids frequent acceleration and load changes when changing gears, resulting in more comfortable driving and a sportier driving style. In the gear arrangement described, for example, in DE 101 34 118 A1, the dual-clutch transmission has two transmission shafts (transmission input shafts) arranged coaxially with each other, to which on the one hand a friction clutch is assigned to each on the input side and on the transmission side A transmission gear set that assigns a set of gears, preferably even gears and on the other hand assigns odd gears and reverse. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04
CPCF16H57/0401F16H57/0454Y02T10/76F16H3/006Y10T74/19991Y10T74/19228
Inventor 延斯·帕茨纳马库斯·雷坦麦尔彼得·赫贝尔迪特尔·克拉克斯纳
Owner ZF FRIEDRICHSHAFEN AG
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