Actuator Assembly for Hydrostatic Transaxle Direction Control
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Solution Overview
Problem
Existing actuator assemblies for vehicles with integrated hydrostatic transaxles lack a reliable mechanism to enable or disable powered devices based on the direction of a control device's movement, leading to inefficient operation and potential damage.
Innovation Solution
An actuator assembly that includes a control arm, return-to-neutral mechanism, and an actuator arm, which positions a switch to enable or disable a powered device by rotating between first and second positions in response to the control arm's movement, allowing for seamless transition between forward, reverse, and neutral positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an actuator assembly is used to enable or disable powered devices based on control device direction, then operational efficiency and damage prevention are improved, but device complexity increases
Solution Approach 1:
The patent combines the actuator arm, switch, and return-to-neutral mechanism into a single integrated actuator assembly that works together to enable/disable powered devices based on control direction, rather than using separate components for each function
Solution Approach 2:
The actuator assembly serves multiple functions: it actuates the switch to enable/disable powered devices, provides return-to-neutral capability, and prevents damage by controlling operation based on control device direction, all within a single assembly
2Ease of operation
If a switch mechanism is added to enable or disable powered devices, then operational control is improved, but device complexity increases
Solution Approach 1:
The actuator arm automatically actuates the switch based on its own movement between first and second positions, eliminating the need for separate control mechanisms and providing self-service operation
Data Source
AI summary
A drive apparatus having an actuator assembly mounted on a control device is disclosed. The drive apparatus comprises an input, a variable drive system, a control device, and an actuator assembly. The drive apparatus is mounted on a vehicle that comprises an operating system. A prime mover drives the input, which subsequently drives one or more axle shafts. The variable drive system is capable of operation in forward and reverse directions. The control device determines the direction of operation and speed of the variable drive system. The actuator assembly is mounted to a component of the control device. The actuator assembly determines the state of operation of the output device with respect to the forward or reverse operation of the variable drive system.