Shift Device Axial Restriction Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shift devices for vehicles face challenges in reducing the size of the shift body in the rotation radial direction while maintaining effective rotation restriction and position changing capabilities.
Innovation Solution
The shift device incorporates a restriction member with a projection in the rotation axial direction that can be moved to restrict the shift body's rotation, utilizing a rotating member with engagement portions at different positions to facilitate movement and a biasing member to suppress rattling, allowing for a compact design and simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restriction member projects in the rotation radial direction of the shift body, then the rotation restriction function is achieved, but the size of the shift device in the rotation radial direction increases
Solution Approach 1:
The restriction member is inverted from the conventional design where it projects in the rotation radial direction to a design where it projects in the rotation axial direction. This inversion allows the restriction portion to engage with the shift body's peripheral surface, achieving rotation restriction while reducing the device's radial size.
Solution Approach 2:
The restriction member's projection direction is changed from the rotation radial direction to the rotation axial direction. This dimensional change allows the restriction function to be achieved along the axial direction instead of the radial direction, thereby reducing the overall radial size of the shift device.
2Adaptability or versatility
If multiple engagement portions are provided at different positions, then the restriction member can be moved to multiple positions for changing shift positions, but the device complexity increases
Solution Approach 1:
The rotating member is designed with multiple engagement portions that can engage with the restriction member at different positions. This multi-functional design allows a single rotating member to control the restriction member's movement to multiple positions, achieving shift position changes without adding complex separate mechanisms for each position.
Solution Approach 2:
The engagement portions are designed to automatically engage and disengage with the restriction member through the rotation of the rotating member. This self-service mechanism eliminates the need for additional actuators or complex control systems, reducing overall device complexity while enabling multiple movement positions.
3Length of moving object
If the restriction member is moved in the rotation axial direction, then the size in rotation radial direction is reduced, but the mechanism for moving the restriction member becomes more complex
Solution Approach 1:
The function of moving the restriction member in the rotation axial direction is merged with the rotation function of the rotating member. As the rotating member rotates, its engagement portions automatically push or pull the restriction member along the axial direction, combining two movements into a single rotational action and simplifying the overall mechanism.
Data Source
AI summary
A shift device includes: a shift body that is operated so as to be rotated and to change a shift position; and a restriction member provided with a restriction portion, the restriction portion projecting in a rotation axial direction of the shift body, and the restriction member being moved in the rotation axial direction of the shift body so as to restrict rotation of the shift body at the restriction portion.