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Gearwheel, in particular parking ratchet wheel

A gear and parking technology, applied in the direction of belts/chains/gears, vehicle components, elements with teeth, etc., to achieve uniform energy distribution and load reduction effects

Pending Publication Date: 2020-10-27
ZF FIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This task is also solved by a parking lock with such a gear

Method used

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  • Gearwheel, in particular parking ratchet wheel
  • Gearwheel, in particular parking ratchet wheel
  • Gearwheel, in particular parking ratchet wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] figure 1 Shown is a gear wheel 10 in the form of a parking ratchet of a not shown parking lock of a vehicle transmission (not shown) and a pawl 20 which engages in the first toothing 2 of the parking ratchet 10 . The parking ratchet 10 is arranged coaxially to the axis 98 . The pawl 20 is arranged coaxially with the axis 99 . The two axes 98 , 99 are arranged axially parallel to one another.

[0029] The parking ratchet 10 comprises an annular body 1 . The ring body 1 includes a first engaging portion 2 arranged on the outer circumference of the ring body 1 for engaging the pawl 20 . The ring body 1 also includes a second toothing 3 arranged on the inner circumference of the ring body 1 for a form-locking connection to a shaft (not shown). The two teeth 2 , 3 are radially acting teeth. In a known manner, the first toothing 2 has a toothing 4 with straight toothed flanks 4a, 4b. There are corresponding recesses between adjacent teeth 4 . The internal toothing 3 ha...

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PUM

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Abstract

The invention relates to a gearwheel (10), in particular a parking ratchet wheel, which includes an annular body (1). The annular body includes a first toothing (2), arranged on an outer circumferenceof the annular body, for engaging a pawl (20), and a second toothing (3), arranged on an inner circumference of the annular body, for the form-locking connection to a shaft (30).

Description

technical field [0001] The invention relates to a gear, in particular a parking ratchet for an automatic transmission, an automatic transmission or an electric drive, and a parking lock. Background technique [0002] The parking lock is to mechanically lock the transmission output shaft on the transmission housing. In most cases, a pawl fastened to the housing is hooked into a meshing wheel of the output shaft for this purpose. In road vehicles with electric traction drives it is often necessary to provide a mechanical parking lock which brakes the drive when the vehicle is stationary in order to prevent the vehicle from rolling unintentionally. [0003] Usually, this is achieved by means of an activatable pawl which engages in a groove of a gear wheel, in particular a parking ratchet. If the parking lock is engaged not at a standstill, but at low speeds of the vehicle, impacts on the parking lock can occur when the pawl is engaged. This is the case, for example, when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/17F16H63/34
CPCF16H55/17F16H63/34B60T1/005F16H63/3425B60T1/062F16D63/006F16H2055/176F16H2055/173
Inventor U·迈尔
Owner ZF FIEDRICHSHAFEN AG