Crank Bearing Link Element Guides Roller Cage
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Solution Overview
Problem
Existing disc brake transmission devices require complex assembly processes due to the need for separate bearing shells and limited movement paths, which can lead to unintentional loosening and detachment of bearing components during assembly and operation.
Innovation Solution
A transmission device design featuring a link element that guides the roller bearing cage in the circumferential direction and ensures secure attachment through form fit, with retaining elements and convex-concave guides preventing radial detachment, allowing for easier assembly and handling without a separate bearing shell on the rotary lever.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate bearing shell is attached to the rotary lever, then the roller bearing cage can be properly supported, but the assembly process becomes complex and components may unintentionally loosen or detach
Solution Approach 1:
The patent combines the bearing shell attachment function with the link element by integrating retaining elements directly into the link element structure. The link element simultaneously serves as both the guiding structure and the retaining structure, eliminating the need for separate bearing shell attachments to the rotary lever. This merging reduces the number of components and simplifies the assembly process while maintaining secure attachment of the roller bearing cage.
Solution Approach 2:
The link element is designed to perform multiple functions: it guides the roller bearing cage in the circumferential direction, provides form fit to prevent radial detachment, and incorporates retaining elements for secure attachment. This multi-functionality eliminates the need for separate dedicated attachment components, reducing assembly complexity while ensuring reliable component retention.
2Ease of operation
If the roller bearing cage is allowed to move freely, then it can accommodate operational movements, but it may become detached radially during assembly and operation
Solution Approach 1:
The link element provides different types of constraints at different locations: it allows circumferential movement through the link space while providing radial retention through form fit and overlapping guides. This localized differentiation of constraint types enables the roller bearing cage to move freely in the operational direction while preventing radial detachment.
Solution Approach 2:
The patent controls movement in different dimensions separately: the link space allows movement in the circumferential direction (tangential dimension) while the form fit and guides prevent movement in the radial direction. This dimensional separation enables operational freedom while ensuring radial retention.
3Reliability
If retaining elements are added to secure the roller bearing cage, then radial detachment is prevented, but the assembly process becomes more complex
Solution Approach 1:
The retaining elements are integrated directly into the link element structure rather than being separate components. This merging means that the same element that guides the roller bearing cage also retains it radially, eliminating the need for additional separate retaining components and simplifying the overall assembly process.
Solution Approach 2:
The link element serves as both the guiding structure and the retaining structure through its integrated design. The form fit and overlapping guides that provide guidance also simultaneously provide radial retention, making the link element a multi-functional component that reduces assembly complexity.
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 solution simplifies the assembly process by ensuring the roller bearing cage remains securely attached, preventing radial loosening and facilitating easy mounting and handling, while maintaining effective force transmission in disc brakes.
Implementation Method 1
the rolling elements roll directly on the partially cylindrical outer surface of the rotary lever
Implementation Method 2
through a form fit, it ensures that the roller bearing cage cannot become detached from the link element in the radial direction
Implementation Method 3
these have a convex cross section and that the corresponding cross section sliding along them is concave at the side edges of the roller bearing cage
Data Source
Figure 1~2
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Figure 5~8
AI summary
A bearing arrangement is proposed for the mutual support of two partially cylindrical pressure pieces (20, 21), one of which is a rotary lever (20) having a partially cylindrical surface (25) and inner and outer rolling surfaces (31, 32) curved in a circular arc and radially opposed to each other with interposed rolling elements (30). One rolling surface (31) is the partially cylindrical surface (25) of the rotary lever (20), and the rolling elements (30) are grouped individually or in groups within a rolling bearing cage (35) movably arranged relative to both pressure pieces (20, 21). To make such a bearing of a rotary lever easier to assemble, a cam element (40) is proposed which is arranged on one of the two pressure pieces (20, 21) and guides the rolling bearing cage (35) indirectly or directly in the circumferential direction and overlaps from the outside.