Clutch Basket Assembly With Replaceable Pins for Wear Resistance
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Solution Overview
Problem
Existing clutch basket housings made of aluminum wear out quickly due to contact with friction discs, leading to notching and grooving, which causes friction disc binding and suboptimal clutch disengagement, while steel baskets lack effective dampening mechanisms and are heavy and costly.
Innovation Solution
A clutch basket assembly with removable pins or wear liners that provide durable, non-movable coupling between friction discs and the basket, allowing for easy replacement when worn, and incorporating features to manage torque loads and dampen shock loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum clutch basket housings are used, then weight is reduced and manufacturing cost is reasonable, but wear resistance deteriorates quickly due to contact with friction discs causing notching and grooving
Solution Approach 1:
The clutch basket is divided into two functional parts: a lightweight aluminum housing and replaceable steel pins. The pins are segmented components that can be individually replaced when worn, while the aluminum housing remains. This segmentation allows the system to combine the weight advantages of aluminum with the durability of steel at the critical wear points.
Solution Approach 2:
The steel pins are designed as consumable, replaceable components that absorb wear instead of the aluminum housing. When the pins become worn with notching and grooving, they are replaced rather than replacing the entire clutch basket. This approach uses cheaper, shorter-lived components to protect the main structure.
2Reliability
If steel clutch baskets are used, then wear resistance is improved, but weight increases and manufacturing cost increases
Solution Approach 1:
Instead of making the entire clutch basket from steel, only the critical contact points (the pins) are made of steel. The rest of the clutch basket housing remains aluminum. This local application of steel provides wear resistance exactly where it is needed - at the friction disc contact points - while maintaining the overall weight advantages of aluminum construction.
3Ease of manufacture
If aluminum clutch basket housings are used, then manufacturing cost is reasonable, but service life deteriorates due to quick wear from friction disc contact
Solution Approach 1:
The clutch basket is segmented into a permanent aluminum housing and replaceable steel pins. This allows the inexpensive aluminum housing to be retained while only the worn pins need replacement. The segmentation enables cost-effective maintenance by replacing only the consumable components rather than the entire assembly.
Solution Approach 2:
The steel pins serve as economical, replaceable components that extend the service life of the clutch basket system. When the pins wear out, they are replaced rather than replacing the entire basket, providing an cost-effective solution that significantly extends the operational life of the clutch assembly.
4Power
If friction discs contact the aluminum basket housing, then torque transmission is achieved, but harmful factors increase due to notching and grooving causing binding
Solution Approach 1:
The steel pins act as intermediary components between the friction discs and the aluminum clutch basket housing. Instead of the friction discs directly contacting the aluminum housing, they contact the steel pins which in turn contact the housing. This intermediary layer prevents the harmful notching and grooving of the aluminum housing while still enabling torque transmission through the pin-friction disc interface.
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 solution minimizes wear and enhances clutch engagement and disengagement performance by providing durable, replaceable coupling surfaces and effective dampening, improving clutch lever feel and reducing noise and drag.
Implementation Method 1
The function of the cushions or springs is to dampen shock loading between the engine and clutch and between the clutch and clutch output. When a spike in energy is transmitted from the engine to the basket assembly through the driven gear, the cushions absorb some of this energy in order to help reduce overloading of the contact surfaces between the basket assembly and clutch disks.
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
An improved clutch basket assembly is disclosed. The improved clutch basket assembly provides improved wear resistance at the interfaces between friction discs and a clutch basket housing while allowing an operator to have improved clutch lever control and modulation when manually engaging or disengaging the clutch system. The improved clutch basket assembly includes a generally cylindrical clutch basket having a sidewall, a closed first end and an open second end. A plurality of removable pins is attached to the sidewall. A plurality of frictions disks is mounted in said clutch basket. The friction disks each have a plurality of positioning tabs extending out from a periphery of each of the friction disks. The positioning tabs are configured for engagement with at least one adjacent removable pin removably attached to the sidewall.