CV Joint Boot Assembly Using Guided Sealing Ring Insertion
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Solution Overview
Problem
The existing methods for assembling a boot and a sealing ring onto an inner race of a constant velocity joint often damage the boot, particularly due to the use of a sealing ring, which is typically made of a rubber-like material.
Innovation Solution
A device with a guider having an inclined guide surface and a pusher that moves the boot and sealing ring along this surface to a support surface on the inner race, using a supporter to facilitate the assembly, ensuring the boot and sealing ring are securely fastened without damaging the boot material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a sealing ring is used to secure the boot to the inner race, then the compact design requirement is met, but the boot material may be damaged during assembly
Solution Approach 1:
The patent introduces a guider as an intermediary component between the pusher and the boot-sealing ring assembly. The guider's inclined guide surface provides a controlled interface that distributes assembly forces, preventing direct concentrated loading that would damage the boot while still enabling the sealing ring to secure the boot compactly to the inner race.
Solution Approach 2:
The inclined guide surface of the guider is designed to gradually guide the boot and sealing ring into position before final contact with the inner race. This gradual approach cushions the assembly process, preventing sudden impact forces that could damage the boot material while maintaining the compact sealed design.
2Productivity
If a pusher is used to force the boot and sealing ring onto the inner race, then assembly efficiency is improved, but the boot material may be damaged
Solution Approach 1:
The guider acts as a mediator between the pusher's forcing action and the boot-sealing ring assembly. It translates the pusher's linear motion into a controlled gradual assembly process along the inclined guide surface, maintaining productivity while preventing boot damage through distributed force application.
Solution Approach 2:
The inclined guide surface changes the force application parameters by distributing the pusher's force over a longer distance and gradual angle, rather than direct vertical loading. This parameter change enables efficient assembly while protecting the boot material from damage.
3Device complexity
If the boot and sealing ring are assembled without guidance, then the assembly process is simpler, but misalignment and damage may occur
Solution Approach 1:
The guider serves as a simple intermediary component that provides alignment guidance without significantly complicating the assembly process. Its inclined guide surface naturally guides the boot and sealing ring into correct alignment, preventing misalignment damage while adding minimal structural complexity.
Solution Approach 2:
The inclined guide surface uses a curved/angled geometry to gradually guide the assembly components into proper alignment. This curved approach simplifies the guidance function compared to complex mechanical alignment mechanisms while effectively preventing misalignment and boot damage.
Data Source
AI summary
An assembling device is a device for assembling a boot and a sealing ring to an inner race of a constant velocity joint in which a fixing part of the boot is fastened to the inner race by the sealing ring and includes: a guider provided with a guide surface on an outer surface to guide the boot and the sealing ring along a longitudinal direction of the inner race; and a pusher that provides a force to move the boot and the sealing ring along the guide surface to reach a support surface of the inner race.