Shift Device Motor-Driven Restriction Mechanism
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Solution Overview
Problem
Existing shift devices face challenges in minimizing size and component count, which affects ease of installation and cost efficiency in vehicles.
Innovation Solution
A shift device design that incorporates a drive section to restrict or release the rotation of a shift body, utilizing a transmission mechanism and gear configurations to simplify the configuration and reduce the number of components, while maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional shift device design is used, then the shift function is achieved, but the size and number of components increase
Solution Approach 1:
The patent combines the restricting section and release section into a single integrated structure that works with one drive section. The restricting body and cam section are merged into one component assembly, eliminating the need for separate restricting and release mechanisms. This merging reduces the number of components while maintaining the complete shift locking and releasing functionality.
Solution Approach 2:
The single drive section serves multiple functions: it rotates the shift body to change shift positions, it drives the transmission mechanism to rotate the shift body to a specific position, and it simultaneously actuates the restricting section to both restrict and release rotation. This multi-functionality reduces component count while maintaining reliable shift control.
2Volume of moving object
If a conventional shift device design is used, then the shift function is achieved, but the size of the device increases
Solution Approach 1:
The transmission mechanism is arranged with gears that mesh in a nested configuration around the shift body rotation axis. The drive section is positioned at one end of the rotation axis, allowing components to be stacked or nested along the axial direction rather than requiring radial space. This nesting approach reduces the overall device volume while maintaining ease of installation.
3Device complexity
If a compact design with fewer components is used, then size and component count are reduced, but the ability to restrict and release rotation must be maintained
Solution Approach 1:
The cam section acts as an intermediary between the drive section and the restricting body. When the drive section rotates, it rotates the cam section, which then translates this rotation into linear displacement of the restricting body through cam profile interaction. This intermediary mechanism allows compact design while maintaining precise control over rotation restriction and release.
Solution Approach 2:
The cam section utilizes changes in its rotational position to control the restricting body's displacement. As the cam section rotates to different angular positions, the cam profile changes the effective radius, which changes the displacement of the restricting body. This parameter change approach allows a single drive section to control both restriction and release functions without additional components.
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
The design allows for a compact and cost-effective shift device that can change shift positions efficiently, reducing the size and component count while maintaining operational effectiveness.
Implementation Method 1
a shift body-side gear that is configured to rotate integrally with the shift body; a shift body drive gear that meshes with the shift body-side gear and that is rotated by drive force of the drive section being transmitted
Implementation Method 2
a cam section that is configured to rotate integrally with the cam gear; and a restricting body that is engaged with the cam section, and that is displaced by the cam section being rotated
Data Source
AI summary
A shift device includes a knob that is rotated to change a shift position, and an operation mechanism including a motor. At least one of restricting or releasing restriction of rotation of the knob is performed when the motor is driven, further, the shift position of the knob is changed to a specific shift position when the motor is driven. Thus, driving a common motor in the shift device enables at least one of restricting or releasing restriction of rotation of the knob to be performed, and enables the shift position of the knob to be changed to the specific shift position. This enables the configuration of the shift device to be simplified, and enables an increase in the size and an increase in the number of components in the shift device to be suppressed.