Integrated Transmission and Axle Locking for EV Standstill
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Solution Overview
Problem
Existing solutions for securing an electric vehicle at a standstill require a combination of separate transmission locking and frictional brake devices, leading to increased space, weight, and cost due to the need for a separate frictional brake, which is only used in a limited number of situations, such as parking on a gradient.
Innovation Solution
A securing device that integrates a transmission locking device and an axle locking device, where the axle locking device acts on the drive axle to block rotation, allowing the omission of a separate frictional brake, with both locking devices being independently operable to provide secure standstill positioning without the need for a handbrake, enabling a more compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate frictional brake device is provided in addition to transmission locking device, then secure standstill securing action is achieved, but construction outlay, space requirement, weight and cost increase
Solution Approach 1:
The patent combines the transmission locking device and axle locking device into a single integrated securing device with a common housing. The transmission locking means and axle locking means are housed together and controlled by a single control unit, merging two previously separate functions into one unified system. This reduces construction outlay while maintaining secure standstill securing action through the complementary action of both locking mechanisms.
2Reliability
If a separate frictional brake device is provided in addition to transmission locking device, then secure standstill securing action is achieved, but space requirement increases
Solution Approach 1:
The axle locking device is nested within the housing of the transmission locking device. The axle locking means is positioned inside the same housing that contains the transmission locking means, with both mechanisms sharing the same spatial envelope. This nesting arrangement eliminates the need for separate space allocation for each locking device while ensuring both functions operate independently and effectively.
3Reliability
If a separate frictional brake device is provided in addition to transmission locking device, then secure standstill securing action is achieved, but weight increases
Solution Approach 1:
The patent merges the axle locking device with the transmission locking device into a single integrated unit with shared housing and control systems. By combining these functions, the total weight of separate components is reduced while maintaining the secure standstill securing action through the coordinated operation of both locking mechanisms.
4Reliability
If a separate frictional brake device is provided in addition to transmission locking device, then secure standstill securing action is achieved, but production cost increases
Solution Approach 1:
The integration of transmission locking and axle locking functions into a single device reduces the number of separate components that need to be manufactured, assembled, and quality-checked. The common housing and shared control unit simplify the manufacturing process and reduce production costs while maintaining reliable standstill securing action through the combined locking mechanisms.
Data Source
AI summary
A securing device for securing an electric vehicle in a stationary position. The securing device having a transmission locking device and an axle locking device. The transmission locking device has a transmission locking drive with a transmission locking shaft for driving a transmission lock between a transmission locking position and a transmission release position. The axle locking device has an axle locking drive with an axle locking shaft for driving an axle lock between an axle locking position and an axle release position. The transmission locking shaft and the axle locking shaft are formed independently of one another.