Wiper Motor Spherical Segment Lever for Transverse Force Compensation
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Solution Overview
Problem
Existing wiper motors for vehicle windows face inefficiencies due to transverse forces in the bearing mount, which can arise from manufacturing tolerances and deformations, leading to increased power consumption.
Innovation Solution
A wiper motor design featuring a lever extension with a spherical segment fastening region that allows pivoting within the bearing mount, reducing power requirements and compensating for manufacturing tolerances and deformations, along with a torque-proof connection to the wiper shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid clamped connection is used between the lever extension and bearing mount, then structural stability is improved, but transverse forces increase power consumption and reduce efficiency
Solution Approach 1:
The extension is made pivotable within the bearing mount, transforming the rigid static connection into a dynamic adjustable connection. This allows the extension to automatically adapt its position and eliminate transverse forces through pivoting motion, reducing power consumption while maintaining operational stability
Solution Approach 2:
The connection type is changed from fixed rigid to pivotable, allowing positional parameters of the extension to vary dynamically. This parameter change enables the system to accommodate manufacturing tolerances and deformations without generating harmful transverse forces
2Use of energy by moving object
If high manufacturing precision is required to eliminate transverse forces, then efficiency is improved, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of trying to prevent manufacturing tolerances and deformations, the invention accepts them and converts the potential harm into benefit by allowing the extension to pivot and self-adjust. The tolerances and deformations that would normally create harmful transverse forces are now accommodated through the pivoting mechanism, eliminating the need for high precision manufacturing while maintaining efficiency
3Use of energy by moving object
If the extension is made pivotable to reduce power consumption, then efficiency is improved, but connection stability may be compromised
Solution Approach 1:
The pivotable extension serves itself by automatically adjusting its position to eliminate transverse forces. The system self-regulates the connection stability through the pivoting motion, maintaining stable operation without requiring external control mechanisms while keeping power consumption low
Data Source
Figure 1~3
AI summary
The invention relates to a wiper motor (10) for the cleaning of vehicle windows, with an output element (17) rotatable about an axis (19), wherein in the output element (17) at a distance (a) the first axis (19) a bearing mount (25) is constructed for a drive lever (30) for driving a wiper shaft (11), wherein the wiper shaft (11) is pivotably mounted in a further axis (16) arranged at least substantially parallel to the axis (19) of the output element (17), and wherein the drive lever (30) is received with an extension (35) in a clamping manner in the bearing mount (25) and extends at least substantially in a plane arranged perpendicularly to the axes (16, 19). According to the invention, it is provided that the extension (35) has a fastening region (36) in the shape of a spherical segment, which cooperates with the bearing mount (25), and that the extension (35) is pivotable about a centre point of the fastening region (36).