Gear Shift Bullet Portion Sliding Protrusion Guide
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Solution Overview
Problem
The existing gear shift mechanisms in vehicles suffer from poor operability and rattling issues due to gaps between the bullet portion and the housing, which degrade the operating feeling for the driver and lead to scattering of manipulation force.
Innovation Solution
An apparatus with a housing and a bullet portion featuring a sliding protrusion and groove system, combined with an elastic member, that allows the bullet portion to be elastically moved in and out of the accommodating space, eliminating gaps and providing a guided operation to prevent rattling and improve the operating feeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gap is provided between the bullet portion and the housing, then the bullet portion can be freely moved, but rattling occurs and operating feeling deteriorates
Solution Approach 1:
A sliding protrusion is introduced as an intermediary element between the bullet portion and the housing. This protrusion fits into a sliding groove to guide the bullet portion's movement, eliminating rattling while maintaining operational smoothness. The intermediary structure mediates between the need for free movement and the need to prevent harmful rattling.
Solution Approach 2:
The sliding protrusion changes the movement parameters of the bullet portion by providing guided motion through the sliding groove. This constrains the bullet portion to move only in the intended longitudinal direction, preventing lateral rattling while preserving the elastic movement capability provided by the spring member.
2Object-affected harmful factors
If the bullet portion is tightly fitted in the housing, then rattling is prevented, but the elastic movement is restricted
Solution Approach 1:
The connection between the bullet portion and housing is segmented into two functional zones: a tight fit between the sliding protrusion and sliding groove for rattling prevention, and a gap between the bullet portion body and housing for elastic movement. This segmentation allows simultaneous achievement of both tight fitting and elastic movement.
Solution Approach 2:
The system dynamically adapts the fit between bullet portion and housing: the sliding protrusion provides a tight guided connection to prevent rattling, while the spring member maintains an elastic connection that allows controlled movement. The system transitions between constrained guidance and elastic movement based on operational needs.
3Object-affected harmful factors
If multiple components are used to eliminate gaps, then rattling is prevented, but device complexity increases
Solution Approach 1:
The sliding protrusion is merged with the bullet portion as an integrated feature rather than a separate component. This merging approach eliminates the need for additional parts while still providing the gap-filling function to prevent rattling, thereby reducing device complexity while maintaining effectiveness.
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 solution reduces the number of parts, enhances maintenance, saves weight and cost, and effectively prevents rattling and excessive stroke-induced issues, providing an improved articulated operating feature and enhanced driver feedback.
Implementation Method 1
an elastic member disposed between the head part and the accommodating space to operate to allow the bullet portion to be elastically moved in and out of the accommodating space
Data Source
AI summary
An apparatus for imparting an operating feeling of a gear shift mechanism to a driver, may include a housing having an accommodating space, a bullet portion disposed in the accommodating space to operate in a longitudinal direction of the accommodating space, wherein the bullet portion has a head part on an upper portion thereof, and an elastic member disposed between the head part and the accommodating space to operate to allow the bullet portion to be elastically moved in and out of the accommodating space. The head part has a sliding protrusion and the accommodating space has a sliding groove having a shape to correspond to that of the sliding protrusion.