Self-aligning Driveshaft Coupler Spiral Channel Mechanism
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Solution Overview
Problem
Coupling a tractor power take off (PTO) to the driveline of a rear-mounted implement is time-consuming, difficult, and requires manual alignment, posing safety and ease-of-use challenges, especially when dealing with standard PTO driveshafts and various implement shafts, and existing solutions often require external energy sources.
Innovation Solution
A self-aligning driveshaft coupler featuring a receiving clutch with a spiral channel and locking clutch assembly, including a locking pin and drive pins, which allows for automatic alignment and secure engagement without external energy sources like electricity, hydraulics, or pneumatics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual alignment and coupling methods are used, then the PTO can be coupled to the implement driveline, but the process is time-consuming and difficult
Solution Approach 1:
The coupling mechanism performs alignment and engagement automatically through the interaction of the spiral channel and locking pin, without requiring external assistance or complex manual manipulation. The system uses its own structural features to accomplish the coupling task
Solution Approach 2:
The spiral channel and locking pin are pre-configured in specific positions and orientations before coupling occurs. When the PTO shaft is inserted, these pre-positioned features automatically guide the alignment and engagement process, eliminating the need for manual alignment during operation
2Reliability
If traditional splines and keepers are used, then rotational power can be transmitted, but correct alignment between male and female splines is difficult to achieve
Solution Approach 1:
The locking pin acts as an intermediary element that mediates between the male PTO shaft and the female driveline. Instead of directly aligning complex spline features, the locking pin engages first and guides the entire coupling process, simplifying the alignment task
3Reliability
If manual manipulation of locking features is required, then the driveline can be secured, but the operation becomes more difficult and time-consuming
Solution Approach 1:
The locking pin automatically performs the securing function through its own movement along the spiral channel. As the PTO shaft rotates during normal operation, the locking pin is driven axially to engage the locking feature, eliminating the need for manual manipulation of separate locking mechanisms
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
Enhances operator safety and ease of use by facilitating quick and correct alignment of PTO driveshafts with implement shafts, ensuring secure coupling without the need for external energy sources, thus improving the efficiency of tractor-implement connections.
Implementation Method 1
a locking pin that enters and follows a spiral channel and pulls the locking clutch assembly axially toward the base as the receiving clutch rotates
Implementation Method 2
a plurality of drive pins that enter the receiving holes to rotatably engage the locking clutch assembly to the receiving clutch
Data Source
AI summary
A self-aligning driveshaft coupler includes a receiving clutch having a spiral channel around its neck, and a locking clutch assembly with a first ring shaped member and a second ring shaped member that rotate together. A locking pin extends radially from the second ring shaped member and into the spiral channel and pulls the locking clutch assembly toward the receiving clutch as the receiving clutch rotates. A plurality of drive pins extend axially from the first ring shaped member and engage the receiving clutch when the locking pin is at the end of the spiral channel.