CV Joint Detachable Mechanism With Inverted Locking Structure
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Solution Overview
Problem
The existing detachable mechanisms for constant velocity universal joints in propeller shafts have complex cylindrical member designs, increasing processing costs for metal components and complicating the design for resin components, and require additional parts and recessed grooves for fixing the annular member, which raises costs and part counts.
Innovation Solution
A simplified detachable mechanism featuring a cylindrical member with a movable fixing member and an annular member, where a locking claw on the annular member fits into a locking groove of the inner joint member, allowing secure fixation and separation without a retaining ring or recessed grooves, using a radial and axial movement system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking claw is provided on the cylindrical member and a locking groove is provided on the inner joint member to connect them, then the connection between the cylindrical member and inner joint member is secured, but the shape of the cylindrical member becomes complicated
Solution Approach 1:
Instead of providing the locking claw on the cylindrical member (complex shape), the invention inverts the design by providing the locking claw on the annular member and the locking groove on the inner joint member. This allows the cylindrical member to maintain a simple shape while achieving secure connection through the inverted locking mechanism.
2Reliability
If an annular recessed groove is formed in the power transmission shaft and a retaining ring is fitted in the recessed groove to fix the annular member, then the annular member is securely fixed to the power transmission shaft, but processing cost increases and the number of parts increases
Solution Approach 1:
The invention extracts and eliminates the retaining ring and annular recessed groove from the design. Instead of using these separate components, the annular member is directly fixed to the power transmission shaft through a simplified structure that integrates the fixation function into the annular member itself, reducing both processing cost and part count while maintaining secure fixation.
3Reliability
If the cylindrical member has a complicated shape to accommodate the locking claw and retaining ring structure, then the detachable mechanism functions properly, but manufacturing cost increases
Solution Approach 1:
The invention merges multiple functions into fewer components. The annular member integrates both the locking function (through its locking claw) and the fixation function (through its direct connection to the power transmission shaft), eliminating the need for separate retaining rings and complex cylindrical member shapes, thereby reducing manufacturing cost while maintaining functionality.
Data Source
AI summary
A constant velocity universal joint includes outer and inner joint members that transmit torque while allowing angular displacement via balls, a power transmission shaft connected to the inner joint member in a torque transmittable manner, and a detachable mechanism between the inner joint member and the power transmission shaft to detach the power transmission shaft from the inner joint member. The detachable mechanism includes a cylindrical member externally fit onto the power transmission shaft, spheres movable in a radial direction in the cylindrical member, and an annular member movable in an axial direction on an outer periphery of the cylindrical member. Locking claws are provided at an end of an inner joint member side of the annular member, and a locking groove is provided at an end of an annular member side of the inner joint member. The locking claws are fitted into the locking groove.