Sealed Parking Lock Connector Layout Inside EV Transmission Housing
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Solution Overview
Problem
The integration of a parking lock within a transmission housing of an electrically drivable vehicle poses challenges due to limited construction space and the presence of lubricants and higher temperatures, which can lead to lubricant leakage and operational impairments.
Innovation Solution
A transmission device with a parking lock arranged inside the transmission housing, utilizing a plug connector with sealing means, such as sealing rings, to prevent lubricant escape, allowing for space-saving construction without compromising operation. The plug connector connects externally to the cable arrangement, ensuring effective sealing and facilitating easy replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the parking lock is integrated inside the transmission housing to save construction space, then the space utilization is improved, but the risk of lubricant leakage increases due to the opening required for the connection apparatus
Solution Approach 1:
The connection apparatus with cable arrangement is nested within the transmission housing opening, with the plug connector positioned inside the housing and the cable arrangement extending through the opening. This nesting approach allows the parking lock control system to be integrated within the transmission housing volume while maintaining lubricant containment through the sealing arrangement.
Solution Approach 2:
The plug connector serves as an intermediary element that bridges the external cable arrangement and the internal parking lock mechanism. It provides a sealed interface that allows electrical connection while preventing lubricant escape, effectively mediating between the need for space-efficient integration and the requirement for reliable lubricant containment.
2Ease of operation
If the plug connector is connected to the transmission housing opening to allow external access, then the operability is improved, but the sealing effectiveness deteriorates due to potential clearances
Solution Approach 1:
Sealing rings are employed at the interface between the plug connector and transmission housing opening to create a flexible sealing barrier. These sealing rings conform to the mating surfaces and eliminate clearances, providing effective lubricant containment while maintaining the operational access required for the connection apparatus.
3Reliability
If multiple sealing elements are used to seal individual cables, then the sealing effectiveness is improved, but the device complexity increases
Solution Approach 1:
The sealing structure is segmented into multiple sealing elements, with each sealing element dedicated to sealing a specific cable within the plug connector. This segmentation approach improves sealing effectiveness by addressing each cable's sealing needs individually while organizing the complexity into manageable, modular units that can be systematically arranged within the plug connector housing.
Data Source
AI summary
A transmission device (1) for an electrically drivable vehicle (29), comprisinga transmission element (2),a parking lock (6), by means of which the transmission element (2) can be blocked,a transmission housing (9), which encloses the transmission element (2) and the parking lock (6),a connection apparatus (10) with a cable arrangement (11) extending in the transmission housing (9) and to the first end of which a plug connector (12) is attached, the plug connector being arranged in a transmission housing opening (14) for contacting the cable arrangement (11) from the exterior of the transmission housing (9) and having contact elements (25) arranged in a plug connector housing (15), wherein a second end of the cable arrangement (11) is connected to the parking lock (6), wherein the plug connector (12) has at least one sealing means (18, 27) for preventing a lubricant from escaping through the transmission housing opening (14).