Suspension Joint Limiter Ring Seal Configuration
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Solution Overview
Problem
Existing spherical bearings in suspension systems face challenges in maintaining lubrication and preventing debris entry due to ineffective sealing methods, which can lead to premature wear and maintenance difficulties.
Innovation Solution
A joint design incorporating a limiter ring and seal configuration that limits the rotation of the pin relative to the outer race, ensuring the seal maintains contact with the cylinder surface and prevents debris entry, while being durable enough to withstand operational stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lip seal is seated in the outer race to seal the bearing, then the sealing effectiveness is improved, but the seal may fall off the edge of the ball or inner race and get crushed by the pin when the bearing rotates to maximum position
Solution Approach 1:
A limiter ring is introduced as an intermediary component between the seal and the pin. The limiter ring extends radially outward to contact the seal, preventing the seal from moving beyond a safe position where it could be crushed by the pin. This mediator component protects the seal from mechanical damage while maintaining effective sealing.
Solution Approach 2:
The limiter ring provides beforehand protection by establishing a physical barrier before the seal can be damaged. By positioning the limiter ring to contact the seal at a predetermined location, the system prevents the seal from entering the dangerous zone where pin contact could occur during maximum rotation.
2Object-affected harmful factors
If a flexible covering or boot is provided over the entire bearing to reduce debris entry, then debris protection is improved, but the bearing lubrication retention is worsened and maintenance becomes more difficult
Solution Approach 1:
The sealing system is segmented into two distinct functions: an inner lip seal that retains lubrication within the bearing, and an outer flexible covering that protects against debris. This segmentation allows each component to optimize its specific function without compromising the other, addressing both lubrication retention and debris protection requirements.
3Reliability
If a flexible boot is assembled tightly around bearing components to seal the bearing, then sealing effectiveness is improved, but the boot may twist or wrap up and become damaged when components move relative to one another
Solution Approach 1:
The limiter ring is installed beforehand to establish the maximum allowable rotation position before any damage can occur. By setting this mechanical limit in advance, the system prevents the boot from twisting or wrapping up during operation, maintaining both sealing effectiveness and boot integrity.
Data Source
AI summary
A joint for use in a suspension system including an elongated suspension member is disclosed. The bearing assembly comprises an outer race, an inner race, a shaft, a collar, and a seal. The outer race is configured to be coupled to the elongated suspension member. The inner race is coupled to the outer race and is moveable relative to the outer race. The shaft is coupled to the inner race. The collar is coupled to the shaft and limits the movement of at least one of the inner race and the shaft relative to the outer race. The seal member is configured to form a seal between one of the shaft and the first collar and one of the outer race and a portion of the elongated suspension member.