Cross Roller Spacer with Protruding Wings
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Solution Overview
Problem
Existing spacer structures for linear transmission apparatuses, particularly for cross rollers, suffer from increased friction and abrasion due to arc contact surfaces, which affect operational efficiency and stability, and conventional chain arrangements exacerbate these issues.
Innovation Solution
A spacer structure comprising a frame with four protruding wings arranged in pairs, allowing the roller's inactive end surfaces to be confined, reducing surface friction and providing stable positioning, with a slenderness ratio of 0.7-0.98 for smooth operation and easy installation, and enabling spacers to be jointed or formed as a unitary structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arc contact surfaces are used on spacers to contact rolling surfaces, then stable positioning and anti-impact effects are achieved, but friction waste and abrasion are substantially increased
Solution Approach 1:
The spacer is divided into multiple independent rolling elements (first rolling element, second rolling element, third rolling element, fourth rolling element) arranged in sequence. Each rolling element contacts the roller independently through its own rolling surface, segmenting the contact area and distributing the load, thereby reducing friction and wear on any single contact point while maintaining stable positioning.
Solution Approach 2:
The invention uses curved rolling surfaces on the spacers that match the curvature of the roller's rolling surface. The first and second rolling surfaces of the first and second spacers respectively contact the rolling surface of the roller, utilizing curved geometry to achieve stable positioning through point contact rather than arc contact, significantly reducing friction waste and abrasion.
2Ease of manufacture
If chains are arranged on sides of spacers to joint them together, then spacers can be connected, but operation is affected and friction is substantially increased
Solution Approach 1:
The spacer structure integrates the connection function directly into the spacer body through protrusions and recesses. The first spacer has a protrusion that fits into a recess on the second spacer, merging the positioning and connection functions into a single integrated structure, eliminating the need for separate chains and reducing friction.
3Reliability
If arc-shaped contact surfaces closely contact rolling surfaces, then operational stability is provided, but friction waste is substantially increased and operation efficiency decreases
Solution Approach 1:
The invention employs curved rolling surfaces on multiple spacers that conform to the roller's curvature, creating point contacts rather than arc contacts. The first rolling surface of the first spacer, the second rolling surface of the second spacer, and similar surfaces on subsequent spacers all utilize curved geometry to maintain operational stability while minimizing contact area and friction, thereby improving operation efficiency.
Data Source
AI summary
A spacer structure for cross rollers comprises a frame and four protruding wings, the protruding wings are arranged in pairs on opposing sides of the frame and outwardly extend therefrom. The two inactive end surfaces of the roller are confined between the paired protruding wings of the spacer. The slenderness ratio of the roller is designed to be 0.7-0.98 for facilitating installation of the roller between the paired protruding wings of the spacer, and such arrangement can effectively reduce the contact area between the spacer and the roller. The paired opposite protruding wings can provide a stable positioning effect to the end surfaces of the roller.