Ball Joint Open Locking Ring Load Distribution
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Solution Overview
Problem
Conventional ball and socket joints experience inhomogeneous load distribution due to manufacturing inaccuracies, leading to uneven stress on certain areas, which can result in reduced load-bearing capacity and potential jamming of the joint ball.
Innovation Solution
A ball joint design featuring an open locking ring with a parting line transverse to the central longitudinal axis, which is inserted into the annular space between the ball socket and the housing, allowing for expansion or compression to compensate for manufacturing inaccuracies, and an annealing process is applied to the ball shell to ensure homogeneous stress conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional closed locking ring is used, then the structure is rigid and stable, but manufacturing inaccuracies cause inhomogeneous load distribution and stress concentration
Solution Approach 1:
The locking ring is designed as an open ring with a parting line, segmenting the continuous circular structure. This allows the ring to be inserted into the annular space and expand or compress to accommodate manufacturing tolerances, ensuring homogeneous load distribution between the ball socket and housing while maintaining structural stability
Solution Approach 2:
The locking ring's geometric parameters are optimized with a specific cross-sectional shape and wall thickness distribution. The ring can change its effective circumference through elastic deformation when inserted, adapting to manufacturing variations and ensuring uniform contact pressure across the contact surfaces
2Strength
If the locking ring is made as a closed ring, then the structural integrity is high, but it cannot compensate for manufacturing inaccuracies leading to uneven stress
Solution Approach 1:
By introducing a parting line that segments the circular locking ring, the structure gains adaptability while maintaining sufficient integrity. The open design allows the ring to elastically deform and expand/compress during insertion, compensating for manufacturing tolerances in the ball socket and housing without compromising the overall structural strength
Solution Approach 2:
The locking ring transitions from a static closed structure to a dynamic open structure that can adapt its shape. When inserted into the annular space, the ring elastically deforms to match the actual dimensions, creating optimal contact conditions and distributing stresses uniformly throughout the joint
3Manufacturing precision
If manufacturing tolerances are tight, then load distribution is homogeneous, but production cost and complexity increase
Solution Approach 1:
The open locking ring with parting line serves as a self-compensating mechanism that automatically adapts to manufacturing variations. During assembly, the ring elastically deforms to fit the actual dimensions of the ball socket and housing, self-adjusting the contact pressures to achieve homogeneous load distribution without requiring precision control during manufacturing
Solution Approach 2:
The design allows for flexible parameter selection in the locking ring's cross-section and wall thickness, enabling manufacturers to produce the ring with standard tolerances. The ring's elastic properties and geometric design compensate for variations, achieving consistent performance without tight manufacturing controls
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
The design enhances the load-bearing capacity of the ball joint by evenly distributing loads and reducing stress inhomogeneities, preventing jamming and improving the joint's operational stability.
Implementation Method 1
The locking ring is expanded or compressed, for example, which is possible due to its open design. Manufacturing inaccuracies can thus be compensated for.
Implementation Method 2
an annealing process is applied to the ball shell to ensure homogeneous stress conditions
Data Source
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AI summary
A ball joint (1) having a housing (2) which comprises an interior space (3) and a pin opening (4), the interior space of which housing has, in a region facing toward the pin opening, an inner circumferential surface (6) which runs around an axial central longitudinal axis (5), having a ball socket (7) which is arranged in the interior space and which is open toward the pin opening and which, on its side facing toward the pin opening, has an overlap region (8) which is inclined inwardly relative to the central longitudinal axis in the direction of the pin opening and which, together with the inner circumferential surface of the housing, delimits a ring-shaped space (9), having a ball pin (11) which comprises a joint ball (10) and which is mounted by way of its joint ball movably in the ball socket and which extends out of the housing through the pin opening, and having a closure ring (12) which is inserted into the ring-shaped space and which is fixed axially between the ball socket and an inner shoulder (13), provided in the region of the pin opening, of the housing, which closure ring has an outer circumferential surface (14) which bears against the inner circumferential surface of the housing, and which closure ring has an abutment surface (16) which bears against an abutment region (15) of the overlap region of the ball socket and which is inclined inwardly relative to the central longitudinal axis in the direction of the pin opening, wherein the closure ring is in the form of an open ring.