Ball-Bearing Attachment Point for Heavy Load Rotation
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Solution Overview
Problem
Existing attachment points for lifting technology face challenges with limited rotatability under heavy loads, high wear, and complex assembly processes, leading to reduced service life and increased costs.
Innovation Solution
The attachment point features two bushings axially connected via a press connection, with inner and outer rings of roller bearings that provide a form-fitting enclosure for spherical rolling elements, allowing for high load absorption and simplified assembly, and includes a braking element to prevent undesired rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a plain bearing is used in the attachment point, then the load-bearing capacity is good, but the rotatability is limited especially with heavy loads
Solution Approach 1:
The patent replaces the plain bearing (sliding friction mechanism) with a roller bearing (rolling friction mechanism). This substitution changes the mechanical principle from sliding contact to rolling contact, thereby maintaining high load-bearing capacity while significantly improving rotatability and reducing friction under heavy loads.
2Strength
If the connecting eyelet is rigidly connected to the base of the slinging eyelet, then the structural strength is improved, but the connecting eyelet cannot be tilted out of an axis of the fastening device
Solution Approach 1:
The patent transitions from a rigid, fixed connection to a dynamic, rotatable connection by introducing roller bearings. The connecting eyelet is no longer rigidly fixed but can rotate and tilt relative to the base, allowing adaptation to different loading directions while maintaining structural strength through the roller bearing support.
3Ease of manufacture
If conventional attachment points are used, then the assembly is simple, but they have a high degree of wear and tear and have an insufficient service life
Solution Approach 1:
The patent replaces the plain bearing with a roller bearing system, which fundamentally changes the friction mechanism from sliding to rolling. This substitution dramatically reduces wear and tear while maintaining assembly simplicity, thereby extending the service life and improving reliability of the attachment point.
4Ease of operation
If roller bearings are used to improve rotatability, then the mobility is improved, but the assembly requires many work steps and tools which complicates the assembly and makes it more expensive
Solution Approach 1:
The patent integrates the roller bearing components into a unified bushing structure that is press-fitted as a single unit. This merging of components reduces the number of separate parts and assembly steps, simplifying the assembly process while maintaining the mobility benefits of roller bearings.
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
This design enhances mobility, load-bearing capacity, and service life while simplifying assembly and reducing wear, resulting in a more efficient and durable attachment point.
Implementation Method 1
a pair of roller bearings between the mount and the connecting element, the connecting element being rotatable relative to the mount
Implementation Method 2
the receptacle has two bushings which are axially connected via a press connection
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
The invention relates to an attachment point (1), comprising a connecting element (3). Said connecting element comprises a section (5) for connecting an attachment means, a receptacle (9) for a fastening means (11), and at least one rolling-element bearing pair (23) between the receptacle (9) and the connecting element (3). The connecting element (3) can be rotated in relation to the receptacle (9). The rolling-element bearings (25, 27) of the rolling-element bearing pair each have at least one rolling element (29). According to the invention, in order to provide an attachment point that has low wear, is easy to rotate even during the lifting of heavy loads, and is easy to install, the rolling-element bearings (25, 27) of the rolling-element bearing pair (23) have an outer ring (39, 41) attached to the connecting element (3).