Shift Lever Hook Restriction Mechanism for Rattling Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shift devices experience rattling issues when movement of the shift body is restricted in the second direction, which affects the stability and operation of the shift lever.
Innovation Solution
A shift device design incorporating a shift body, first and second projecting portions, and a restricting body that restricts movement in specific directions, with the first projecting portion projecting from the shift body and the second projecting portion projecting from the first portion, and a slide face with a curved shape to reduce resistance, allowing for effective restriction of movement and suppression of rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the shift body is restricted from moving in the second direction, then movement control is improved, but rattling occurs in the shift body
Solution Approach 1:
A cushioning member is introduced as an intermediary element between the shift body and the restricting body. This cushioning member absorbs vibrations and prevents direct contact that causes rattling, while still allowing the restricting body to effectively control the shift body's movement in the second direction.
Solution Approach 2:
The cushioning member is positioned in advance between the shift body and restricting body to prevent rattling before it occurs. This proactive cushioning approach absorbs potential vibrations and impacts, ensuring smooth operation without harmful rattling sounds or movements.
2Volume of moving object
If the projection leading end face is disposed along the length direction, then structural compactness is improved, but manufacturing complexity increases
Solution Approach 1:
The shift body is divided into multiple projection portions (first projecting portion and second projecting portion) with distinct functions. The first projecting portion handles movement restriction in the second direction, while the second projecting portion handles restriction in the first direction. This segmentation allows each projection to have a simpler, more manufacturable geometry while achieving overall compactness.
Solution Approach 2:
The projection portions are designed with asymmetric geometries optimized for their specific functions. The first projecting portion has a leading end face disposed along the length direction for compactness, while the second projecting portion has a different orientation. This asymmetric design allows each component to be manufactured efficiently for its specific purpose while maintaining overall structural compactness.
Data Source
AI summary
Rattling of a shift body in a second direction is suppressed when movement of the shift body toward one side in the second direction is restricted. In a shift lever device, a projecting portion of a hook of a lever projects toward the left from the lever. When disposing the lever on an R position side from an N position, a leading end face of the projecting portion is restricted from pivoting toward the left side by a right face of a rear restricting portion of a left plate, such that a pivot operation of the lever toward the right side is restricted. Flexing of the hook can thereby be suppressed, enabling rattling of the lever in a left-right direction to be suppressed.