Shouldered Packaging Sleeve for Needle Roller Bearing Mounting
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Solution Overview
Problem
Full complement needle roller bearings are challenging to transport and mount without damaging or losing the needles, as existing solutions require difficult removal from a cylindrical sleeve and lack secure fixation during transport and installation.
Innovation Solution
A packaging sleeve arrangement with an outer cylindrical sleeve featuring a shoulder to hold needles in place, allowing for easy transport and mounting by substituting the outer race of the bearing, with optional inner sleeves for additional stability and secure positioning, eliminating the need for additional fixing means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If needles are arranged in a cylindrical sleeve for transport, then needle protection and secure positioning are improved, but needle removal and mounting become difficult
Solution Approach 1:
The cylindrical sleeve is segmented into two portions by a shoulder feature, creating a first portion for secure transport and a second portion for easy needle removal. The shoulder divides the sleeve axially, allowing needles to be held firmly during transport while enabling straightforward extraction during mounting operations.
Solution Approach 2:
The shoulder is pre-positioned within the cylindrical sleeve during manufacturing, establishing the division between transport and mounting zones before the actual transport and mounting operations occur. This preliminary structural feature ensures that the sleeve is pre-configured to facilitate both secure holding and easy release of needles.
2Reliability
If additional fixing means are used to secure needles in the sleeve, then needle retention is improved, but device complexity increases
Solution Approach 1:
The cylindrical sleeve itself provides the securing function through its shoulder feature, eliminating the need for separate fixing means. The sleeve's own geometry creates the retention mechanism by forming a shoulder that axially positions and secures the needles during transport, making the system self-sufficient.
Solution Approach 2:
The shoulder acts as an intermediary structural element within the cylindrical sleeve that mediates between the need for secure needle retention and the desire for simplicity. It provides the securing function without requiring additional components, serving as an integrated solution within the sleeve structure.
Data Source
AI summary
Disclosed is a packaging sleeve for a full complement needle roller bearing, wherein the packing sleeve is adapted to accommodate at least one set of needles of a full complement needle roller bearing, and wherein the packaging sleeve comprises an outer cylindrical sleeve, wherein a shoulder is arranged on an inner surface of the outer cylindrical sleeve so that the set of needles abut against the shoulder when being arranged in the outer cylindrical sleeve. Furthermore, a packaging sleeve arrangement including such a packaging sleeve and a method for mounting a packaging sleeve are disclosed.