Chassis Joint Inner Part Position Sensing Without Blind Cavities
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Solution Overview
Problem
Existing chassis components with measuring devices face challenges in simplifying the arrangement and reducing manufacturing complexity and costs, particularly when blind-hole-like cavities are not feasible, which can compromise the structural strength and increase manufacturing complexity.
Innovation Solution
A chassis component design that includes a joint inner portion fitted into a joint holder of a structural component in a movable and articulated manner, with a measuring device comprising a first measuring element on the structural component and a second measuring element on the joint inner portion, where the second measuring element is attached outside the joint holder to simplify manufacturing and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a blind-hole-like cavity is created in the structural component to accommodate a measuring element, then the measuring device can be arranged inside the structural component, but the structural strength is reduced to an undesirable extent
Solution Approach 1:
The measuring element is extracted from the interior of the structural component and placed on the joint inner portion instead. This eliminates the need to create a blind-hole-like cavity in the structural component, thereby preserving its structural strength while still enabling measurement functionality through the external arrangement of the measuring element on the joint inner portion
Solution Approach 2:
The measuring element is relocated from a three-dimensional interior space (blind-hole-like cavity) to a two-dimensional external surface (joint inner portion). This dimensional shift allows the measuring device to be arranged without compromising the structural integrity of the main component
2Measurement precision
If a measuring element is arranged inside a joint ball of a joint inner portion inside the rubber material, then the measuring element is close to the kinematic point, but the manufacturing complexity and costs increase
Solution Approach 1:
Instead of placing the measuring element at the exact kinematic point inside the rubber material (which would be ideal for measurement precision but complex to manufacture), the measuring element is placed on the joint inner portion's external surface. This partial approach achieves sufficient measurement capability while dramatically simplifying manufacturing by avoiding embedding operations in rubber material
Solution Approach 2:
The measuring element is extracted from the interior rubber material of the joint ball and placed on the external surface of the joint inner portion. This extraction maintains the ability to measure joint position while eliminating the manufacturing complexity of embedding the measuring element within rubber material
Data Source
AI summary
A chassis component (1, 38, 40) has a joint inner portion (2) and a structural component (3), where the joint inner portion (2) is fitted and able to move in an articulated manner in a joint holder (4). A measuring device (5) is configured to determine a relative position of the joint inner portion (2) with respect to the structural component (3) and includes a first measuring element (6) and a second measuring element (7). The first measuring element (6) is on the structural component (3) and the second measuring element (7) is on the joint inner portion (2). In one example, the joint inner portion (2) extends out of the joint holder (4) and the second measuring element (7) is attached on a section (8) of the joint inner portion (2) which is outside the joint holder (4).