CVT Spider Roller Assembly for Belt Grip and Lower Wear
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Solution Overview
Problem
Existing CVT primary clutches in off-road vehicles lack enhanced adjustability and performance, which affects the mechanical strength and complexity of drivetrain and suspension systems.
Innovation Solution
A CVT primary clutch spider assembly roller system that replaces the button system with a roller-based component, including a spider portion with a circular groove, main body arms with roller supporting orifices, and a precision machined stainless steel roller collar, to improve performance and adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a button system is used in the spider assembly, then the structure is simpler, but belt grip and performance are insufficient
Solution Approach 1:
The patent replaces the traditional button system with a roller system in the spider assembly. The roller elements provide superior belt grip through rolling contact compared to the sliding contact of buttons, while the roller mechanism integrates into the existing spider structure without requiring complete redesign of the assembly architecture.
Solution Approach 2:
The invention changes the contact mechanism parameter from sliding (buttons) to rolling (roller elements). This parameter change fundamentally improves the friction characteristics and belt engagement, allowing the spider assembly to maintain better grip on the belt under varying operational conditions.
2Ease of manufacture
If traditional spider assembly components are used, then manufacturing is easier, but belt temperature and wear increase
Solution Approach 1:
The roller system replaces the button contact mechanism, changing from sliding friction to rolling friction. This substitution dramatically reduces the heat generated during operation and minimizes wear on the belt, as rolling contact produces significantly less thermal energy and material degradation than sliding contact.
Solution Approach 2:
By changing the contact type parameter from sliding to rolling, the invention fundamentally alters the thermal and wear characteristics of the belt-spidar interaction. The rolling contact parameter reduces the coefficient of friction and heat generation, directly addressing the harmful effects of belt temperature and wear.
3Speed
If a roller system is implemented, then clutch responsiveness improves, but the device complexity increases
Solution Approach 1:
The roller system replaces the button mechanism, providing superior responsiveness through rolling contact. The roller elements can engage and disengage more quickly and efficiently than buttons, allowing the clutch to respond faster to operational changes while maintaining a relatively integrated structure within the spider assembly.
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 spider assembly roller system enhances belt grip, reduces belt temperature and wear, and provides smooth engagement, resulting in improved clutch responsiveness and performance in various riding conditions.
Implementation Method 1
a circular groove configured to receive an end of a coil spring disposed between the main body and an interior surface of a face plate
Implementation Method 2
a precision machined stainless steel roller collar located between the spider roller and a roller mounting bolt
Implementation Method 3
the moveable sheave engaging exterior rotating surface of the spider roller extending partially outward equal distance from each of the sides of the main body arm to provide smooth back and forth movement
Data Source
AI summary
A CVT spider assembly roller system having a spider portion main body, a plurality of main body arms extending equal distance from a sidewall of the main body with the arms each having a free end, first side, a second side, and a roller supporting orifice extending from the first side to the second side of the arm, a first bolt receiving slot extending from the free end of the arms into the roller supporting orifice and a second bolt receiving slot located on the main body and aligned with the first bolt receiving slot, a spider roller supported partially within the spider roller supporting orifice and including a moveable sheave engaging exterior rotating surface extending partially outward equal distance from each of the sides of the arm, and a shift arm supporting recess located on the sidewall equal distance between each of the arms of the main body.