Brake Caliper Actuator Frame Layout for Quiet Precise Gear Guidance
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Solution Overview
Problem
Existing electromechanical actuators for motor vehicle disc brakes suffer from parasitic noise due to vibrations transmitted to the housing and imprecise positioning of mobile components relative to the motor axis, primarily due to their design and dimensional tolerances.
Innovation Solution
Incorporation of framework elements that guide rotating components around parallel axes, allowing for independent movement of these components relative to the housing and cover, thereby decoupling them and enhancing precise positioning and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mobile components are positioned within the housing using conventional design and dimensional tolerances, then the housing structure is simple, but the positioning precision of components relative to the motor axis is insufficient
Solution Approach 1:
The housing is divided into two independent parts: the housing body and the cover. The mobile components are positioned within the housing body with precise features, while the cover closes the end face. This segmentation allows each part to be manufactured and positioned independently, achieving high positioning precision without requiring the entire housing structure to be complex.
2Object-generated harmful factors
If mobile components rotate around parallel axes within the housing, then the mechanical gearbox function is achieved, but vibrations are transmitted to the housing generating parasitic noise
Solution Approach 1:
By separating the housing into housing body and cover, the vibration path is interrupted. The mobile components containing rotating elements are positioned within the housing body, while the cover acts as a separate structure that closes the end face. This segmentation prevents direct transmission of vibrations from rotating components to the entire housing structure, reducing parasitic noise.
3Manufacturing precision
If the housing and cover are designed with conventional dimensional tolerances, then manufacturing is easier, but the positioning of rotating components around parallel axes is imprecise
Solution Approach 1:
The housing is segmented into housing body and cover, allowing each to be manufactured separately with standard tolerances. The precise positioning of rotating components around parallel axes is achieved through features built into the housing body, while the cover serves as a separate closing element. This approach maintains ease of manufacture for both parts while achieving high positioning precision for the rotating components.
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~4B
AI summary
The invention relates to an electromechanical actuator for a motor vehicle disc brake caliper comprising a housing (8), a mechanical reducer whose components of the mechanical reducer are enclosed in the housing (8) and a cover which closes an end face, in which certain components (17) of the mechanical reducer are mobile in the housing (8) in movement around one or the other of two axes (AX, AS) parallel to each other, characterized in that it comprises at least one frame element (30) which is connected to one of the housing (8) or the cover and which provides guidance for at least one component moving around a first (AS) of said two axes and guidance for at least another component (17) moving around the other (AX) of said two axes.