Tractor PTO Coupling with Integrated Inserts for Fast Attachment
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Solution Overview
Problem
Conventional PTO coupling devices for tractors are cumbersome and inefficient, requiring precise alignment and rotation of multiple connectors, leading to reduced work efficiency and increased manufacturing costs due to the need for gear teeth on the universal joint.
Innovation Solution
A PTO coupling device with a first coupling part connected to the PTO shaft and a second coupling part detachably connected to the power transmission shaft, featuring a housing with an accommodation space and insertion members that allow for quick and easy alignment and attachment, eliminating the need for precise fitting and reducing manufacturing costs by minimizing gear teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple connectors are individually fitted into openings and the second plate is rotated for coupling, then power transmission is achieved, but the coupling process becomes cumbersome and work efficiency is reduced
Solution Approach 1:
Multiple connectors are integrally formed as a single unit on the second plate, allowing simultaneous insertion into multiple openings rather than individual fitting. This merging of multiple fastening elements into one integrated component enables the entire coupling process to be completed in a single operation, dramatically improving work efficiency while maintaining reliable power transmission.
2Ease of operation
If connectors are rotated in the direction of openings for separation, then the coupling can be disconnected, but the connector top gets caught on the opening making separation difficult
Solution Approach 1:
The separation mechanism inverts the insertion logic: instead of rotating in the direction that causes the connector top to catch on the opening edge, the design enables separation by rotating in the opposite direction or using a different motion path that avoids the catching issue. This inversion of the operational sequence eliminates the separation difficulty while maintaining ease of operation.
3Reliability
If gear teeth are formed on the universal joint shaft for connection, then power transmission is ensured, but manufacturing costs increase
Solution Approach 1:
The gear teeth are extracted from the universal joint shaft and relocated to the connectors that attach to it. This extraction allows the universal joint shaft to have a simpler, more manufacturable form without gear teeth, while the connectors themselves incorporate the gear teeth for power transmission engagement. This redistribution reduces manufacturing complexity and cost of the universal joint assembly.
4Reliability
If the second plate is pulled towards the first plate while rotating for coupling, then connection is achieved, but precise alignment is difficult and the process is inconvenient
Solution Approach 1:
The connectors are pre-positioned and integrally formed on the second plate in the correct spatial arrangement before the coupling operation. This preliminary preparation of the connector array eliminates the need for precise real-time alignment during assembly, as the integrated structure naturally guides itself into the correct position when pulled towards the first plate, making the operation convenient and reliable.
Data Source
AI summary
Provided is a power take off (PTO) coupling device for a tractor. The PTO coupling device includes: a first coupling part connected to a PTO shaft of the tractor; and a second coupling part detachably coupled to the first coupling part and connected to a power transmission shaft of a working machine. The first coupling part includes an accommodation part in a disc shape and having an accommodation space with openings formed in the accommodation part, and a PTO connection part on the front surface of the accommodation part to be fixed to the PTO shaft. The second coupling part includes one or more insertion members formed to be inserted into the openings and inserted into the accommodation space through the openings, and a power transmission connection part fixed to the rear surface of the insertion member and connected to the power transmission shaft of the working machine.