Wiper Arm Connection Device with Offset Longitudinal Web
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Solution Overview
Problem
Existing wiper arm connection devices lack a standardized articulated connection that can efficiently absorb high torques and lateral forces, and are not adaptable to various wiper arm types, leading to play and reduced performance.
Innovation Solution
A connection device with a bearing web and offset longitudinal web, where the adapter is guided laterally with minimal play, using a bearing pin and adapter design that allows for secure locking and holding mechanisms, enabling compatibility with multiple wiper arm types and effective torque and force absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standardized articulated connection is implemented, then adaptability to various wiper arm types is improved, but device complexity increases due to the need for multiple locking and holding mechanisms
Solution Approach 1:
The adapter is designed as a universal component that can connect to multiple different wiper arm types (hook-shaped ends, lateral bearing pins, toplock connections). The adapter incorporates multiple locking and holding mechanisms within a single standardized interface, allowing one component to serve multiple functions and accommodate various connection types without requiring separate specialized adapters for each wiper arm configuration.
2Volume of moving object
If the joint between connecting element and adapter is made compact, then space for locking and holding means is improved, but manufacturing precision requirements increase
Solution Approach 1:
The connection element features a nested structure where the bearing web is offset within the longitudinal web, creating concentric guiding paths. The bearing pin passes through the bearing web and is received by the bearing block, while the longitudinal web provides external guidance against the adapter side wall. This nested arrangement compactly integrates multiple guiding and locking functions within a minimized volume, allowing locking and holding mechanisms to be positioned efficiently without increasing overall dimensions.
3Stability of the object's composition
If lateral guidance is improved by offsetting the longitudinal web, then stability under high torques is improved, but the connection device becomes less adaptable to different configurations
Solution Approach 1:
The longitudinal web is deliberately offset asymmetrically relative to the bearing web, with the longitudinal web positioned outward and the bearing web inward. This asymmetric arrangement creates a specific guiding geometry where the outer face of the longitudinal web contacts the inner face of the adapter side wall, while the inner face of the bearing web contacts the bearing block. This asymmetric configuration provides stable lateral guidance and torque resistance while maintaining compatibility with standardized adapter designs through consistent geometric relationships.
Data Source
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AI summary
The invention is based on a connection device (10) for the articulated connection of a wiper arm (70, 72, 98, 100, 124, 156) to a wiper blade (12) which is permanently connected to a connecting element (22, 170) of the connection device (10), which connection device has at least one bearing web (30) which runs in the longitudinal direction, projects into the interior of the adapter (34, 84, 106, 142, 168) and has a bearing pin (62, 172) which runs transversely with respect to the longitudinal direction, on which bearing pin (62, 172) an adapter (34, 84, 106, 142, 168) is pivotably mounted by bearing means (54, 60, 186), wherein the adapter (34, 84, 106, 142, 168) has latching means (42, 44, 90, 118, 120, 154, 166) and securing means (40, 52, 110, 112, 150, 152, 164, 192, 196) for detachable connection to the wiper arm (70, 72, 98, 100, 124, 156). It is proposed that the bearing web (30) be integrally formed onto a longitudinal side of a base (24) only in a shorter region at the end of the connecting element (22, 170).