Lockable Differential Transmission With Bearing-Supported Clutch Actuation
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Solution Overview
Problem
Current differential transmissions in motor vehicles face challenges in reducing weight and size while maintaining precise torque control and minimizing deformation of the transmission housing due to actuating forces, which affects the clutch's operation and overall efficiency.
Innovation Solution
A lockable differential transmission design where the bearing is mounted on the actuating device rather than the housing, allowing the actuating device to be positioned overlapping and coaxially with the bearing, thereby reducing the load on the housing and enabling a more compact and lightweight structure. The actuating forces are primarily transmitted through the bearing and stop, minimizing deformation and ensuring precise torque control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bearing is mounted on the housing, then the housing structure is simpler, but the housing experiences deformation due to actuating forces affecting clutch operation
Solution Approach 1:
The bearing is extracted from the housing and mounted on the actuating device instead. This separates the load-bearing function from the housing, allowing the housing to remain simple while the actuating device absorbs the actuating forces through the bearing and stop, preventing housing deformation and maintaining clutch operation precision.
2Volume of moving object
If the actuating device is integrated into the housing, then the overall structure is more compact, but the housing bears the full actuating load causing deformation
Solution Approach 1:
The bearing mounted on the actuating device acts as an intermediary that absorbs and redirects the actuating forces. The stop on the output shaft serves as another intermediary to support axial actuating forces. This intermediary arrangement allows compact integration while preventing the housing from bearing the full actuating load, thus avoiding deformation.
3Loss of energy
If the bearing is mounted on the actuating device, then the housing load is reduced, but the actuating device structure becomes more complex
Solution Approach 1:
The actuating device is designed to perform multiple functions: it actuates the clutch, mounts the bearing to support radial loads, and provides mounting for the stop to support axial loads. This multi-functionality justifies the increased structural complexity by eliminating the need for separate housing modifications and reducing overall system energy loss through improved load management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves a more compact and lighter differential transmission with reduced deformation, ensuring precise torque control and efficient operation by minimizing the load on the housing and maintaining close tolerances, thus enhancing the overall performance and longevity of the transmission.
Implementation Method 1
The at least one output shaft is mounted in a rotatable manner via a bearing, for example a rolling bearing
Data Source
AI summary
A differential transmission for transmitting a torque to an axle of a motor vehicle, has at least one driveshaft and at least one output shaft, which are connectable in torque-transmitting manner via a clutch within a housing of the differential transmission, wherein the clutch is actuatable via an actuating device, wherein the actuating device is mounted on the housing, wherein the at least one output shaft is mounted in a rotatable manner via a bearing, wherein the bearing is mounted on the actuating device; wherein a stop is arranged on the at least one output shaft such that an actuating force that is provided for actuating the clutch and acts at least in an axial direction is supported on the stop at least via the actuating device and the bearing.