Tapered Roller Bearing Cage Assembly Over a Retaining Rim
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Solution Overview
Problem
Existing methods for manufacturing and assembling tapered roller bearings require significant additional effort due to the need for special pocket designs or split rings, which complicate the process.
Innovation Solution
A tapered roller bearing design with a bearing cage featuring obliquely extending webs and pockets with increased length relative to the roller's axial length, allowing rollers to be displaced during assembly, and optionally using retaining elements to limit axial movement, facilitating easier assembly and increased self-retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bearing cage has a standard pocket length equal to the roller length, then the structure is simple and manufacturing is easy, but the rollers cannot be displaced axially to enable assembly over the retaining rim
Solution Approach 1:
The cage pockets are pre-designed with increased length during manufacturing to enable roller displacement. This preliminary structural preparation allows the rollers to be axially displaced outward during assembly, enabling the bearing cage to be pushed over the retaining rim without requiring complex assembly mechanisms or additional components.
2Ease of operation
If special pocket designs are used to allow roller tilting, then assembly is enabled, but the manufacturing effort and device complexity increase significantly
Solution Approach 1:
The invention changes the geometric parameter of the cage pocket length, making it longer than the roller length by a specific amount. This parameter modification enables the desired roller displacement and assembly functionality without requiring changes to the cage material properties, manufacturing processes, or additional structural features, thus avoiding increased manufacturing effort.
3Ease of operation
If the inner ring is designed as a split ring, then the retaining flange can be mounted separately, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The invention extracts the assembly facilitation function from the inner ring structure and transfers it to the cage pocket design. Instead of modifying the inner ring into a complex split structure, the solution is extracted and implemented as a simple dimensional feature of the cage pockets, allowing assembly to proceed with a standard intact inner ring while still enabling roller displacement.
4Strength
If heavy rollers with large mass are used, then the bearing capacity is increased, but the assembly process becomes more difficult and may cause damage
Solution Approach 1:
The cage pockets are pre-designed with increased length to accommodate heavy rollers during assembly. This preliminary structural preparation creates the necessary space for axial displacement of heavy rollers without requiring excessive assembly forces, thereby enabling damage-free assembly of high-capacity bearings with large-mass rollers.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a tapered roller bearing (1) comprising at least one first ring, at least one second ring, and a plurality of rollers (8) arranged between the at least one first ring and the at least one second ring, wherein the first or the second ring has a retaining rim (6), wherein the tapered roller bearing further comprises at least one bearing cage (2) comprising at least one first cage ring element (10), a second cage ring element (12), and a plurality of webs extending substantially in the axial direction, wherein the webs and the cage ring elements are connected to one another such that pockets for receiving a roller are formed between the webs and the cage ring elements, wherein each pocket has a pocket length in the axial direction and a pocket width in the circumferential direction, wherein the pocket length of at least one pocket is greater than an axial length (LR) of the received roller by a predetermined amount,wherein the predetermined amount is selected such that the received roller can be moved in the pocket such that the bearing cage can be moved at least partially over the retaining edge.