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Positively engaging shifting element which can be hydraulically or pneumatically actuated

A shift element, hydraulic technology, applied in the direction of transmission elements, elements with teeth, fluid-driven clutches, etc., can solve the problems of increased conversion clearance, driving comfort and noise impact, life and efficiency disadvantages, etc.

Inactive Publication Date: 2015-01-21
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With increased tooth play, the shifting play on the shifting element increases during load changes, which has the disadvantage of having a negative effect on driving comfort and noise generation
[0014] In the case of changing the inclination of the prongs, an axially acting resistance occurs, whereby the prongs are always held against pressure; moreover, said axial forces act on the relevant axial bearings, with attendant consequences for life and adverse effect on efficiency

Method used

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  • Positively engaging shifting element which can be hydraulically or pneumatically actuated
  • Positively engaging shifting element which can be hydraulically or pneumatically actuated
  • Positively engaging shifting element which can be hydraulically or pneumatically actuated

Examples

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Embodiment Construction

[0026] exist figure 1 An exemplary assembly variant of the hydraulically or pneumatically actuatable form-fitting shifting element according to the invention is shown in .

[0027] The shifting element comprises a hydraulically or pneumatically actuatable piston 1 having a piston chamber 2 in which a hydraulic or pressure medium is located, the shifting element also comprising pawls 3 and counter pawls The tooth 4 and the claw tooth 3 are embedded in the pair of claw teeth 4 in the inserted state.

[0028] The shifting element also includes a spring 5 acting as a release spring (Ausrückfeder) for pushing back the claws 3 (for the open state of the shifting element in the depressurized state, this corresponds to the embodiment shown mode) or inward (for the state of the shift element in the depressurized state is closed), wherein the spring 5 acts against the piston 1 when the piston 1 is hydraulically or pneumatically operated. When the shifting element is closed or engaged ...

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Abstract

The invention relates to a positively engaging shifting element which can be hydraulically or pneumatically actuated, comprising a hydraulically or pneumatically actuatable piston (I) having a piston compartment (2) containing a hydraulic medium or pressure medium, a pressure medium supply (6) for the piston (I), a jaw (3) and a mating jaw (4) with which the jaw (3) meshes when engaged. The engaging speed of the jaw (3) can be increased by decoupling the jaw (3) from the hydraulic or pneumatic volume flow when the jaws (3) and (4) are in a tooth butt position in relation to each other and by pretensioning the jaw (3) by means of a hydraulic or pneumatic pressure reservoir (7) that is actively connected to the piston (I) and that is connected to the pressure medium supply (6). The gap between the jaws, i.e. the window into which the jaw (3) can be engaged is maintained as narrow as possible in order for a tooth butt position of the jaws (3) and (4) in relation to each other being highly probable when the shift element is applied.

Description

technical field [0001] The invention relates to a hydraulically or pneumatically actuatable form-fitting shifting element. [0002] The invention relates in particular to a hydraulically or pneumatically actuatable, form-fitting shift element for load-shiftable vehicle transmissions, preferably in a planetary or countershaft configuration or in a hybrid Automotive transmissions of structural form, or for continuously variable transmissions with several transfer zones, for example for hydrostatic, mechanical or electric multiple transfer zone transmissions. Background technique [0003] In load-shiftable automotive transmissions, hydraulically actuable multi-plate shifting elements are generally provided. The multi-plate shifting element is compressed and operated in this way by a hydraulically operated piston whose pressure is controlled by a hydraulic controller. By means of a targeted adjustment of the actuating force and thus the friction torque in the presence of a rot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D25/061F16D48/02
CPCF16D2048/0203F16D25/061F16D48/02F16H2200/2094
Inventor 马蒂亚斯·赖施拉尔夫·德雷布霍尔茨格哈德·贡波采贝格彼得·齐默马克·莫尔曼努埃尔·格茨
Owner ZF FRIEDRICHSHAFEN AG
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