Outboard Motor Steering Cylinder Offset for Pod Clearance
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Solution Overview
Problem
The existing cable-activated hydraulic power steering apparatus for outboard motors on pontoon boats faces interference issues when the motor is tilted, as the actuator housing and cylinder ram collide with the side walls of the pod, requiring modification to the pod for clearance, which degrades its strength.
Innovation Solution
The power steering system is designed with a hydraulic cylinder unit and actuator housing configuration that allows the cylinder ram to extend and retract without colliding with the pod side walls by offsetting the cylinder unit towards one side, ensuring the actuator housing remains between the side walls during tilting, eliminating the need for pod modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cable-activated hydraulic power steering apparatus is installed on a pontoon boat with a pod, then the outboard motor can be steered using hydraulic power, but the actuator housing and cylinder ram collide with the pod side walls when the motor is tilted
Solution Approach 1:
The patent positions the hydraulic cylinder unit asymmetrically relative to the pod's centerline. The cylinder is mounted offset toward one side of the pod, creating an asymmetric arrangement that allows the actuator housing to remain clear of the pod side walls during motor tilting operations while still providing effective steering control.
Solution Approach 2:
The patent resolves the collision problem by utilizing the lateral dimension (width) of the pod rather than only the longitudinal dimension. By positioning the cylinder unit offset toward one side, the actuator housing is directed toward the center of the pod, effectively using the lateral space to avoid collision with the side walls during tilting.
2Adaptability or versatility
If the pod is modified to provide clearance for the actuator housing, then the motor can be tilted without collision, but the structural strength of the pod is degraded
Solution Approach 1:
The patent applies preliminary action by pre-positioning the hydraulic cylinder unit in an offset location during the design and installation phase. This preliminary positioning ensures that the actuator housing will remain clear of the pod side walls throughout the entire range of motor tilting, eliminating the need for any subsequent modification to the pod structure.
3Strength
If the cylinder ram extension space is limited by the pod structure, then the pod maintains its structural integrity, but the power steering apparatus cannot accommodate the required stroke length
Solution Approach 1:
The asymmetric positioning of the cylinder unit toward one side of the pod creates an asymmetric available space for cylinder ram extension. This asymmetric arrangement maximizes the usable extension length within the constraints of the pod structure, allowing the cylinder to achieve its required stroke length without compromising the pod's structural integrity.
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
This configuration enables the outboard motor to be tilted through its full range without interfering with the pod side walls, maintaining the structural integrity of the pod and allowing for seamless steering operations.
Implementation Method 1
The hydraulic cylinder unit is supplied by a pump with hydraulic fluid under pressure
Implementation Method 2
the movement of the actuator housing and cylinder ram follows the movement of the cable
Data Source
AI summary
When a cable-actuated power steering system is used with an outboard motor tiltably supported on a motor mounting pod of a pontoon boat, interference between a valve actuator housing on the end of a cylinder ram of a hydraulic cylinder unit and a side wall of pod is avoided by offsetting the cylinder toward one side wall of the pod so that the actuator housing can move through its full range without interfering with the opposite side wall, and connecting the cable-activated steering rod to a lever on top of the actuator through an L-shaped secondary link that has a first part extending laterally from an end of the steering rod and a second part extending from the first part to the lever in a direction opposite to the direction in which the cylinder ram extends from the cylinder.