Stabilizer Bar Bushing with Elastic Holes and Metal Plates
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Solution Overview
Problem
Conventional stabilizer bar mounting apparatuses experience slippage and noise due to high rotational stiffness of rubber bushings, leading to premature wear and reduced durability, as well as deformation under compressive forces, resulting in a shortened lifespan.
Innovation Solution
The apparatus incorporates a rubber bushing with elastic holes to reduce rotational stiffness and metal plates to enhance internal stiffness, coupled with a mounting bracket that engages stop protrusions to prevent slippage and deformation, thereby improving mounting force and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rubber bushing has high stiffness in rotational direction, then the mounting force is enhanced, but the rotational resistance increases causing slippage between stabilizer bar and rubber bushing
Solution Approach 1:
The rubber bushing is designed with non-uniform stiffness characteristics: high stiffness in the axial direction (to maintain mounting force) and low stiffness in the rotational direction (to prevent slippage). This is achieved through the specific geometric configuration of the rubber material distribution within the bushing structure.
Solution Approach 2:
The stiffness parameters of the rubber bushing are optimized to have different values for different directions. The axial stiffness is maintained high through material selection and structural design, while the rotational stiffness is reduced through geometric features that allow controlled deformation during rotation.
2Strength
If the rubber bushing has high rotational stiffness, then the mounting force is enhanced, but noise is generated by friction during rotation
Solution Approach 1:
The rubber bushing exhibits direction-dependent stiffness properties, being stiff axially for strong mounting but compliant rotationally to minimize friction and noise generation during stabilizer bar operation.
3Duration of action of moving object
If the rubber bushing is used for long period, then the stabilizer bar performs its function, but the rubber bushing deforms causing gap between holding hole and stabilizer bar
Solution Approach 1:
The rubber bushing's physical and mechanical parameters are optimized to resist long-term deformation. This includes selecting rubber compounds with appropriate durometer, aging resistance, and elastic recovery properties, along with structural design that distributes stresses to minimize permanent set.
4Strength
If the rubber bushing is press-mounted to vehicle body frame, then the mounting is secured, but the compressing force deforms the rubber bushing
Solution Approach 1:
The rubber bushing is designed with varying local properties: regions subjected to compressive mounting forces have higher stiffness and reinforcement to maintain shape, while other regions maintain flexibility for rotational compliance.
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
This solution effectively reduces rotational resistance, prevents slippage and noise, enhances durability by preventing deformation, and extends the lifespan of the stabilizer bar by maintaining a consistent interface between the bushing and the stabilizer bar, while also improving the mounting force.
Implementation Method 1
a plurality of elastic holes formed in each of the opposite ends of the main body to reduce stiffness of the main body in a rotational direction thereof
Implementation Method 2
a plurality of metal plates inserted into the main body of the rubber bushing to form a shape such that elastic holes are sectioned into first spaces and second spaces by the metal plates, thus preventing the rubber bushing from being deformed
Implementation Method 3
the stabilizer bar 2 is rotated in the rotational direction (A) with respect to the rubber bushing 10, that is, slippage occurs between the stabilizer bar 2 and the rubber bushing 10. At this time, noise is generated by friction between the stabilizer bar 2 and the rubber bushing 10.
Data Source
Figure 1
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AI summary
An apparatus for mounting a stabilizer bar to a vehicle body frame is disclosed. The stabilizer bar mounting apparatus (1) of the present invention includes a rubber bushing (10), metal plates (30) and a mounting bracket (20). The rubber bushing (10) includes a main body (100), which has a holding hole (100a) for insertion of the stabilizer bar (2), and has a slit (100b) extending from an upper surface thereof to the holding hole (100a). Elastic holes (101) are formed in each of the opposite ends of the main body (100) to reduce stiffness of the main body in a rotational direction. The metal plates (30) are inserted into the main body of the rubber bushing (10) to prevent the rubber bushing from being deformed. The mounting bracket (20) includes a bushing receiving part (200) and a pair of mounting plates (201), which are provided on respective opposite edges of the bushing receiving part, so that the mounting bracket receives and fastens the rubber bushing to the vehicle body frame.