Self-Supporting Bearing With Snap Ring Seat
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Solution Overview
Problem
Cams and followers experience frictional wear due to rotation, leading to inefficiencies and potential damage, and existing solutions do not effectively address the need for improved bearing designs that can handle axial thrust and misalignment.
Innovation Solution
A bearing design comprising an inner and outer race member with a snap ring seat and cylindrical rollers, which is self-supporting and can be eccentrically mounted, allowing it to function as both a follower and a cam, and is used in a cargo dolly to overcome obstacles by adjusting its position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cam rotates on a drive shaft to generate reciprocating motion, then the cam can perform its function, but frictional wear occurs on the circumferential surface of the cam and the follower
Solution Approach 1:
A bearing is introduced as an intermediary component between the cam and follower to reduce direct contact and frictional wear. The bearing includes an inner race member, outer race member, and snap ring that together form a self-supporting structure, reducing wear on the cam and follower surfaces while maintaining the reciprocating motion function.
2Force
If the bearing is designed with an inner race member and outer race member, then the bearing can support axial thrust, but the device complexity increases
Solution Approach 1:
Multiple functional elements are merged into a single self-supporting bearing assembly. The inner race member, outer race member, and snap ring are combined to form an integrated unit that supports axial thrust while maintaining structural simplicity. The snap ring simultaneously provides retention and structural support functions.
Solution Approach 2:
The bearing is designed to perform multiple functions: supporting axial thrust, reducing frictional wear, and maintaining assembly integrity through the snap ring. The same bearing structure can be used in both follower and cam configurations, providing universal applicability.
3Stability of the object's composition
If the bearing is made self-supporting with snap ring retention, then the assembly integrity is maintained, but the manufacturing precision requirements increase
Solution Approach 1:
The snap ring seat is pre-formed during the manufacturing process of the inner and outer race members, ensuring proper alignment before final assembly. The first and second snap ring grooves are created in advance with precise dimensional relationships, reducing the need for post-assembly adjustments and lowering manufacturing precision requirements for the final assembly step.
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 bearing design reduces frictional wear, maintains assembly integrity, and enables the cargo dolly to navigate obstacles by adjusting its height, enhancing operational efficiency and durability.
Implementation Method 1
a plurality of cylindrical rollers in the raceway
Data Source
AI summary
A bearing includes an inner race member having an end surface. An outer race member is disposed about the inner race member. The outer race member has an internal shoulder for engaging the end surface of the inner race member. The inner and outer race members are configured to define a raceway between them and to define a snap ring seat between them. There are cylindrical rollers in the raceway and a snap ring in the snap ring seat. The bearing may be provided as a follower head on a cam follower or may be eccentrically mounted on a drive shaft to serve as a cam. A bearing can be assembled by inserting the inner race member into the outer race member, disposing cylindrical rollers in the raceway and disposing a snap ring in the snap ring seat.