Bicycle Hub Bearing Recesses and Compensating Elements
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Solution Overview
Problem
Conventional bicycle hubs are heavy due to the weight of roller bearings, which affects their performance and cost, and existing lightweight alternatives are either too expensive or have limited operational stability.
Innovation Solution
A hub design featuring bearing units with recesses and compensating elements made of lightweight materials, such as plastic or ceramic, which maintain stability and reduce weight without increasing maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel roller bearings are used to ensure operational stability, then reliability is improved, but weight increases
Solution Approach 1:
The bearing ring is divided into two functional parts: a lightweight base structure (with recesses) and localized reinforcing elements (ridges or compensating elements) positioned only where load transmission is required. This segmentation allows the bearing to be lightweight overall while maintaining stability at critical contact points.
Solution Approach 2:
The bearing ring features non-uniform wall thickness with strategically placed thickened regions (ridges or compensating elements) at specific locations such as the inner circumference or load-bearing areas. This local quality enhancement provides structural reinforcement exactly where needed for operational stability while keeping other areas lightweight.
2Weight of moving object
If ceramic rolling bearings are used to reduce weight, then weight is reduced, but cost increases and operational stability is limited
Solution Approach 1:
The bearing ring combines different materials with complementary properties: a lightweight base material (such as aluminum or plastic) providing low weight, and localized hard material elements (ridges or compensating elements made of ceramic or hard plastic) providing wear resistance and load-bearing capacity. This composite approach achieves weight reduction while maintaining durability and operational stability.
3Weight of moving object
If bearing rings with recesses are used to reduce weight, then weight is reduced, but structural stability may be compromised
Solution Approach 1:
The bearing ring features non-uniform wall thickness with strategically placed thickened regions (ridges or compensating elements) at specific locations such as the inner circumference or load-bearing areas. This local quality enhancement provides structural reinforcement exactly where needed for operational stability while keeping other areas lightweight.
Solution Approach 2:
The bearing ring is pre-formed with recesses and compensating elements during manufacturing, creating built-in structural features that anticipate and prepare for load distribution. The compensating elements are positioned in advance to prevent deformation under expected operating conditions, ensuring stability before the bearing is even installed.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present invention relates to a hub (1) and a series of hubs (2) for at least partially muscle-powered bicycles (200). The hub (1) comprises a hub housing (11) and a bearing unit (3) for rotatably mounting the hub housing (11) relative to an axle (21). The bearing unit (3) comprises two bearing rings (4, 5), each with a receiving surface (14, 15) and a running surface (24, 25). A bearing ring (4) designed as an outer ring (4) is aligned with its receiving surface (14) towards a bearing seat (31) of the hub housing (11). A bearing ring (5) designed as an inner ring (5) is aligned with its receiving surface (15) towards the axle (21). Rolling elements (53) are arranged between the running surfaces (24, 25) of the bearing rings (4, 5).In this case, a bearing ring (4, 5) has a recess (6) for weight reduction on its receiving surface (14, 15), so that the bearing ring (4, 5) is arranged spaced apart from the bearing seat (31) and/or the axis (21) in the area of the recess (6). The recess is arranged axially spaced from a center of the running surface, or the recess (6) comprises the area of the center (24b, 25b) of the running surface (24, 25), and at least in the area of the center (24b, 25b) of the running surface (24, 25) at least one compensating element (16) is arranged in the recess (6), which complements the recessed receiving surface (14, 15) of the bearing ring (4, 5) in a manner appropriate to the bearing seat (31) and/or the axis (21), and which compensating element (16) is made of a material as hard as the material of the bearing ring (4, 5).