Shift Lever Guide Plate Impact Absorption Mechanism
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Solution Overview
Problem
Shift lever devices in vehicles experience impact noise and vibration when the shift lever returns to its original position, particularly from the farthest mode position, due to the lack of effective impact absorption mechanisms in existing guide plates.
Innovation Solution
A guide plate with an elastic member featuring an operation hole and an impact absorption mechanism, including a slit and a stopper, is designed to absorb the impact of the shift lever, preventing it from directly hitting the guide plate and reducing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide plate with a rigid groove structure is used to guide the shift lever movement, then the shift lever can be reliably guided to each mode position, but impact noise and vibration occur when the shift lever returns to the home position
Solution Approach 1:
The patent applies beforehand cushioning by providing a cushioning member (elastic member) in advance at the position where the shift lever returns to the home position. This elastic member is positioned to contact the shift lever before impact occurs, cushioning the return movement and preventing direct impact with the guide plate, thereby reducing impact noise and vibration while maintaining reliable guidance.
2Reliability
If a guide plate with a rigid groove structure is used to guide the shift lever movement, then the shift lever can be reliably guided to each mode position, but vibration is generated during lever operation
Solution Approach 1:
The cushioning member is positioned in advance to contact the shift lever during its return movement to the home position. This elastic member absorbs and dampens vibrations generated during lever operation, preventing them from being transmitted to the guide plate and surrounding structure, while still providing reliable guidance through the groove structure.
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 guide plate effectively suppresses striking noise and vibration by absorbing the impact of the shift lever during its return to the home position, enhancing the operational quietness and stability of the shift lever device.
Implementation Method 1
an impact absorption mechanism is formed in the elastic member. The impact absorption mechanism includes a slit arranged proximal to the operation hole, a seat capable of absorbing impact of the shift lever
Implementation Method 2
The stopper supports inwardly curved deformation of the seat. The seat capable of absorbing impact of the shift lever
Data Source
AI summary
A guide plate for a shift lever device, which is formed in correspondence with a movement range of a momentary type shift lever that automatically returns to a home position after being operated, is provided with an elastic member that includes an operation hole. The elastic member restricts the movement range of the shift lever and guides movement of the shift lever. An impact absorption mechanism is formed in the elastic member and absorbs impact of the shift lever when the shift lever automatically returns to the home position. The impact absorption mechanism includes a slit arranged proximal to the operation hole. A seat that is capable of absorbing impact of the shift lever is arranged closer to the operation hole than the slit. A stopper arranged at a back side of the seat relative to the slit supports inwardly curved deformation of the seat.