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Multi-stage transmission

A technology for transmissions and shifting parts, which is applied to vehicle gearboxes, multi-ratio transmissions, transmissions, etc. It can solve the problems of complex structure and guidance of front gear sets, and achieve large torque transmission capacity and large expansion range. Effect

Inactive Publication Date: 2008-04-02
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the spatial layout of the sun gear of the front gear set through its fixed brake and the spatial layout of the transmission input speed through it to the clutch of the main gear set, resulting in the structure of the front gear set from drive to output complex guidance

Method used

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Embodiment Construction

[0036] The same symbols represent similar components throughout the drawings. FIGS. 1 to 33 relate to a first variant of the pre-planetary gear set according to the invention, wherein the pre-planetary gear set is driven via its engaging bridge, its hollow gear can be connected to the main planetary gear set and its sun gear Gears can be fixed. Figures 34 and 35 relate to a second variant of the pre-planetary gear set according to the invention, wherein the pre-planetary gear set is driven by its sun gear, its hollow gear is connectable to the main planetary gear set and its engaging connection Bridges can be fixed.

[0037] FIG. 1 shows a transmission system diagram as an example of a first variant of the front planetary gear set according to the present invention. Denoted by 1 is, for example, the engine shaft of an internal combustion engine, via which the multi-speed transmission is driven. For vibration decoupling, a conventional torsional vibration damper 2 is arrange...

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Abstract

The invention relates to a multi-stage transmission provided with an input shaft (3), which is connected to a shiftable front-mounted planet gear set (10), with an output shaft (4), which is connected to a shiftable main planet gear set (20), and with a number of shifting elements (A to F) whose selective closing enables the shifting of at least six forward speeds without range shift. An output element of the front-mounted planet gear set (10) can be connected to a first input element of the main planet gear set (20) via a first shifting element (A) and can be connected to a second input element of the main planet gear set (20) via a second shifting element (B). The input shaft (3) can be connected to a third input element of the main planet gear set (20) via a fifth shifting element (E). Preferably, a sun gear (11) of the front-mounted planet gear set (10) can be fixed via a sixth shifting element (F) mounted on the side of the front-mounted planet gear set (10) facing away from the main planet gear set (20). The front-mounted planet gear set (10) is provided in the form of a Plus gearing having inner and outer planet gears (12, 13) whose webs (15, 16) are interconnected.

Description

technical field [0001] The present invention relates to a multi-speed transmission. Background technique [0002] In US 5,106,352A a variety of drivetrain diagrams are known for an automatic transmission comprising a non-shiftable front gear set and a shiftable main gear set in which five shifts are selectively engaged by A total of six forward gears can be engaged without combined shifting. Here, the main gear set is designed as a dual-axle-four-shaft transmission with two engaged planetary gear sets. The non-shiftable front gear set is designed as a single-axle planetary gear transmission, or as a countershaft transmission with two fixed spur gear pairs with different ratios, and always operates as a reduction gear. A member of the front gear set is fixedly connected to the transmission housing. This front gear set is driven at the input speed of the transmission and produces a reduced output speed which can be transmitted to two different members of the main gear set v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/66
CPCF16H2200/2023F16H2200/2007F16H2200/2046F16H3/663F16H3/666F16H2200/0052F16H2200/0056F16H3/66
Inventor 彼得·齐默彼得·蒂斯勒阿明·吉尔林
Owner ZF FRIEDRICHSHAFEN AG
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