Power Unit Coupling Mechanism for Interchangeable Attachments
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Solution Overview
Problem
Traditional outdoor power equipment is often single-purpose and lacks versatility, with conventional devices experiencing difficulties in securely and easily attaching and detaching various work implements to a common power unit.
Innovation Solution
A power unit configured with a frame, handle, user controls, and a power transfer coupling mechanism that allows for secure, safe, and straightforward attachment of multiple interchangeable attachments, utilizing a dog clutch assembly with angled engagement teeth for reliable power transfer and operator presence control integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single-purpose outdoor power equipment is used, then each machine is dedicated to a specific function, but cost and space constraints prevent users from owning multiple machines
Solution Approach 1:
The power unit is designed with a universal interface system that can accommodate multiple different attachments (lawn mower, snow thrower, blower, pressure washer, generator). The standardized coupling mechanism with engagement teeth and corresponding receptacles allows a single power unit to perform multiple functions by simply changing attachments, eliminating the need for multiple dedicated machines.
2Adaptability or versatility
If interchangeable attachments are added to a power unit, then versatility is improved, but difficulty in attaching and detaching work implements increases
Solution Approach 1:
The coupling system is segmented into distinct components: engagement teeth on the power unit, corresponding receptacles on attachments, and separate operator presence control mechanisms. This segmentation allows each component to be independently optimized and simplifies the attachment process - users simply need to align and engage the teeth with receptacles, then activate the control mechanism.
Solution Approach 2:
The engagement teeth and receptacles are designed to self-align and self-eng age during the attachment process. The geometric configuration of the teeth and receptacles guides proper alignment, and the operator presence control mechanism automatically engages when the attachment is properly positioned, reducing the manual steps required.
3Reliability
If a secure coupling mechanism is used to ensure reliable power transfer, then reliability is improved, but the complexity of the coupling mechanism increases
Solution Approach 1:
The engagement teeth are designed with asymmetric geometry - the teeth on the power unit have a specific shape that corresponds to complementary receptacles on the attachments. This asymmetric design ensures proper alignment and secure engagement while preventing improper attachments. The operator presence control mechanism also uses asymmetric positioning to ensure correct orientation during attachment.
Data Source
AI summary
The disclosed technology relate to a device and system that include an outdoor power equipment power unit or cart configured to releasably couple a number of different interchangeable attachments or work implements to a common power unit, where some attachments include and/or require operator presence control, while other attachments do not include and/or require operator presence control. The outdoor power equipment power unit includes a power transfer coupling member operatively coupled to the drive shaft and configured to transfer rotational power to the associated attachment; and an operator presence actuation member operatively coupled to the operator presence control member, the operator presence actuation member configured to rotate in response to user actuation of the operator presence control member.