Asymmetric Slide Roller for Light Starting and High Acceleration
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Solution Overview
Problem
Conventional slide rollers experience inefficiencies in starting torque and acceleration during speed changes, leading to suboptimal fuel-efficient performance at high speeds due to geometric limitations that result in increased wear and delayed acceleration.
Innovation Solution
A slide roller design with a weight and wear-resistant layer featuring specific surface configurations, including an inclined upper sliding surface, curved inner and outer contact surfaces, and a corner sliding surface, which allows for reduced wear and improved acceleration by optimizing the contact points and distances between the roller and pulley disc surfaces, enabling closer belt positioning to the rotary shaft for lighter starting and enhanced acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vertical distance D2 between the upper sliding surface and the center point is greater than the normal distance D3 between the right contact surface and the center point (D2>D3), then automatic compensation of wear and tear is achieved and speed is increased, but the starting torque is insufficient and acceleration in the middle stage is delayed
Solution Approach 1:
The roller is designed with an asymmetric cross-sectional shape where the left contact surface has a normal distance D1 from the center point that is greater than the vertical distance D2 from the upper sliding surface to the center point (D1>D2). This asymmetric configuration allows the roller to maintain optimal contact points throughout its sliding stroke, providing both sufficient starting torque and high transmission speed, thereby resolving the contradiction between speed and force.
2Ease of operation
If the distance between the belt and the center of the rotary shaft is not the minimum distance, then the roller can slide without interference, but the starting torque needs improvement
Solution Approach 1:
The invention optimizes the geometric parameters of the roller, specifically setting the normal distance D1 from the center point to the left contact surface greater than the vertical distance D2 from the upper sliding surface to the center point. This parameter change ensures that the belt can be positioned at the minimum distance from the rotary shaft center, maximizing starting torque while maintaining smooth sliding without interference throughout the roller's stroke.
3Speed
If the distance between the belt and the center of the rotary shaft is maximized, then the roller achieves maximum speed transmission, but the driving pulley disc assembly needs to rotate at higher rotational speed
Solution Approach 1:
The roller features a curved corner sliding surface connecting the upper sliding surface and the left contact surface. This curvature allows the roller to transition smoothly through its sliding stroke, maintaining optimal belt positioning and achieving maximum transmission speed at lower rotational speeds of the driving pulley disc assembly, thereby reducing energy consumption while maintaining high transmission performance.
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 design achieves a lighter starting effect, improved acceleration in the middle stage of sliding, and higher speed transmission at lower rotational speeds, reducing wear and enhancing overall performance compared to conventional slide rollers.
Implementation Method 1
The normal distance D4 from the center point 0 to the corner sliding surface 16 is greater than the vertical distance D2 from the center point 0 to the upper sliding surface 13 (i.e., D2<D4), so that the corner sliding surface 16 can act on the roller passage surface 220
Implementation Method 2
The inner contact surface 14 is a curved surface configured to abut against the inner retaining wall surface 221 when the roller 10 is located at a lowest point of a corresponding one of the roller passage surfaces 220
Implementation Method 3
The outer contact surface 17 is configured to abut against the outer retaining wall surface 222 when the roller 10 is located at a highest point of the corresponding roller passage surface 220
Implementation Method 4
The upper sliding surface 13 is an inclined sliding surface corresponding to a corresponding one of the limiting surfaces 230 of the immovable back plate 23 and acting on the corresponding limiting surface
Data Source
AI summary
A slide roller is provided. A lower connecting surface of the roller is never in contact with a roller passage surface. By taking advantage of a normal distance between a corner sliding surface and a center point of the roller greater than a vertical distance between an upper sliding surface of the roller and the center point, a pulley disc assembly can be started lightly, the acceleration in the middle stage of the slide stroke is increased, and speed transmission in the rear stage of the slide stroke is increased.