Electromagnetic Vehicle Damper Mount for Overload Impact Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle dampers face challenges in maintaining stability and comfort under overload conditions, as excessive loads applied to the damper mount affect the vehicle's behavior and durability, while high-frequency low loads from the road surface require specific damping characteristics to ensure a comfortable ride.
Innovation Solution
The vehicle damper incorporates a second elastic member with higher rigidity than the damper mount rubber, which is strategically positioned to absorb impacts and reduce load application during overloads, and an annular shape to handle bending and twisting stresses, along with a protrusion to prevent excessive compression, ensuring stable behavior and comfortable ride by distributing loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper mount rubber is made with higher rigidity to reduce load application during overload, then the vehicle behavior stability improves, but the ride comfort deteriorates due to increased vibration transmission
Solution Approach 1:
The damper mount system is segmented into two distinct rubber members: a first rubber member (damper mount rubber) that remains flexible for vibration isolation, and a second rubber member (additional rubber) with higher rigidity that activates during overload conditions. This segmentation allows each member to specialize in one function, resolving the contradiction between ride comfort and vehicle stability.
Solution Approach 2:
The system dynamically transitions from a single-rubber configuration to a dual-rubber configuration based on load conditions. During normal operation, only the first rubber member is active, providing vibration isolation. During overload, the second rubber member is compressed and becomes active, providing rigidity. This dynamic adaptation resolves the contradiction by adjusting the system's mechanical properties based on operating conditions.
2Device complexity
If a single rubber member is used for the damper mount, then the structure is simple, but it cannot simultaneously provide vibration isolation and impact absorption
Solution Approach 1:
Different regions of the damper mount system are assigned different rubber properties: the first rubber member (damper mount rubber) has lower rigidity optimized for vibration isolation, while the second rubber member (additional rubber) has higher rigidity optimized for impact absorption. This local differentiation of material properties allows the system to perform multiple functions that a uniform structure cannot achieve.
Solution Approach 2:
The damper mount system uses a composite arrangement of two rubber members with different material properties (different rigidity values). This composite structure combines the advantages of both soft and hard rubber materials, enabling the system to provide both vibration isolation and impact absorption capabilities that neither material could provide alone.
3Speed
If the second elastic member has higher rigidity to quickly absorb impact, then the response speed improves, but the durability of the damper mount rubber decreases due to stress concentration
Solution Approach 1:
The second rubber member acts as an intermediary element between the motor housing and damper mount housing. During overload, it absorbs the impact force through its higher rigidity, protecting the first rubber member from excessive stress. The protrusion structure serves as a mechanical intermediary that controls the compression of the second rubber member, preventing it from being over-compressed and thus protecting both rubber members from damage.
4Strength
If the motor housing and damper mount housing are rigidly connected, then the structural strength improves, but the vibration damping performance deteriorates
Solution Approach 1:
The connection between the motor housing and damper mount housing changes its effective rigidity parameter based on load conditions. During normal operation, the connection is flexible due to the compliant rubber members, providing vibration damping. During overload, the second rubber member is compressed and becomes stiffer, providing structural strength. This parameter change allows the system to adapt its mechanical properties to different operating conditions.
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 enables immediate impact absorption during overloads, enhances the durability of the damper mount rubber, and maintains a comfortable ride by balancing antivibration properties and impact resistance, effectively managing both high-frequency low loads and overload conditions.
Implementation Method 1
a first elastic member (e.g., a damper mount rubber 53 described later)
Implementation Method 2
a second elastic member (e.g., an additional rubber 6, 6A described later) that is provided for at least one of the motor housing or the damper mount housing and abuts on the other of the motor housing or the damper mount housing when a load is applied and the motor housing and the damper mount housing approach each other
Implementation Method 3
The vehicle damper dampens the linear motion of the movable member by an electromagnetic force of the electric motor
Data Source
AI summary
A vehicle damper includes: a movable member that moves with linear motion according to a load applied from a wheel; a conversion member that converts the linear motion of the movable member into rotational motion; an electric motor having a rotor that rotates in conjunction with the rotational motion; a motor housing that houses the electric motor; and a damper mount housing that is fixed to a vehicle body and connected to the motor housing via a first elastic member. The vehicle damper dampens the linear motion of the movable member by an electromagnetic force of the electric motor. The vehicle damper has a second elastic member that is provided for at least one of the motor housing or the damper mount housing and abuts on the other of the motor housing or the damper mount housing when the motor housing and the damper mount housing approach each other.