Transmission Seal Protector With Shaft Position Stop for Leak-Free Assembly
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Solution Overview
Problem
Existing methods for mounting transmission shafts to differential cases often result in oil leaks and seal damage due to improper alignment and handling, leading to time losses and potential damage during assembly.
Innovation Solution
A removable protection device with a longitudinally slotted cylindrical protection ring and a bearing flange with an axial abutment that arrests the shaft's insertion at a reference position, indicating when the splines have passed beyond the seal, allowing for safe removal of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the protection device is removed too early, then the operator can quickly complete the mounting process, but the seal can be damaged during the passage of the shaft
Solution Approach 1:
The abutment projects axially from the bearing flange to define a reference position that provides visual feedback to the operator. When the shaft collar contacts the abutment, it signals that the splines have safely passed under the seal, indicating the appropriate moment to remove the protection device. This feedback mechanism eliminates guesswork and ensures timing accuracy.
2Productivity
If the transmission is advanced too far during the approach phase, then the mounting process progresses faster, but the protector is blocked between the gearbox and the transmission like a vice
Solution Approach 1:
The abutment is pre-positioned on the protection device to define the reference position before mounting begins. This preliminary arrangement ensures that the operator knows exactly where to stop advancing the transmission, preventing the protector from being pinched between the gearbox and transmission housing.
3Device complexity
If no reference position indicator is provided, then the device structure remains simple, but the operator cannot determine when to remove the protector without time loss or risk
Solution Approach 1:
The abutment provides a simple yet effective visual and physical feedback mechanism. When the shaft collar contacts the abutment, it clearly indicates that the splines have passed under the seal and the protection device can be removed. This eliminates time loss and uncertainty without adding complex indicators or sensors.
Data Source
AI summary
A removable protection device is for a transmission seal providing tightness between a differential housing and a transmission shaft inserted therein during installation. The removable protection device includes a cylindrical, longitudinally slotted protection ring which is placed under the seal so as to protect same during the insertion of the shaft, a bearing flange for bearing on the housing, connected to the ring and having a radial opening following the slot of the ring, a removal handle attached to the bearing flange, and an abutment projecting axially towards the outside of the housing from the annular flange, so as to halt the insertion of the shaft in a reference position.