Transmission Control Housing Assembly With Stepped Blind Mounting
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Solution Overview
Problem
The challenge is to develop more compact transmission assemblies and powertrains for vehicles, particularly in heavy-duty applications where space is limited due to the integration of new power sources like electric machines and accompanying components.
Innovation Solution
A transmission assembly design featuring a control device with a transmission mounting surface and a housing with corresponding grooves and guiding members that allow for safe and reliable mounting without direct contact, enabling a blind assembly operation and minimizing the risk of damage to sealing means, while allowing for compact packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control device is mounted directly to the transmission housing with conventional mounting surfaces, then the assembly process requires precise alignment and visual monitoring, but this increases the complexity and time of the assembly operation
Solution Approach 1:
The groove with steps is pre-formed in the transmission housing, and the guiding member is pre-positioned on the control device. During assembly, the guiding member automatically engages with the groove and slides along the predefined path, eliminating the need for precise manual alignment and visual monitoring during the assembly process
Solution Approach 2:
The groove with steps acts as an intermediary mechanism between the control device and transmission housing. It provides a predefined assembly path that guides the mounting surfaces into correct alignment, reducing the skill and time required for assembly operations
2Ease of manufacture
If the control device mounting surfaces are designed to contact directly during assembly, then the mounting is simpler, but this increases the risk of damaging sealing means during blind assembly operations
Solution Approach 1:
The groove is designed with a first step and a second step, where the first step acts as a cushioning zone that absorbs the impact during assembly. The guiding member contacts the first step before reaching the second step, preventing direct impact between mounting surfaces and protecting sealing means from damage
Solution Approach 2:
The groove with its stepped structure serves as an intermediary that mediates the contact between control device and transmission housing. It controls the sequence and manner of contact, ensuring that sealing means are not subjected to damaging forces during assembly
3Volume of moving object
If the transmission assembly is designed with compact packaging to accommodate limited vehicle space, then more components can be integrated, but this reduces the available space for mounting operations and increases component density
Solution Approach 1:
The groove with steps is nested within the transmission housing structure, and the guiding member is integrated onto the control device. This nested design allows the guiding features to occupy minimal space while providing the full assembly guidance function, enabling compact packaging without increasing overall assembly volume
Data Source
AI summary
A transmission assembly for a powertrain of a vehicle, includes,a control device and a transmission housing for housing a transmission, the control device mountable to the transmission housing and including a transmission mounting surface adapted to face the transmission housing,the transmission housing including a control device mounting surface adapted to face the control device,one of the transmission mounting surface and the control device mounting surface including a groove including at least a first and a second step deeper than the first step, andthe other of the transmission mounting surface and the control device mounting surface including an outwardly extending guiding member configured to be received in the groove, configured so that the outwardly extending guiding member can slide in the first step until it reaches the second step, whereafter the transmission mounting surface can be moved towards the control device mounting surface or vice versa.