Vacuum Cleaner Nozzle Dual-Hinge Steering for Flat-Use Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vacuum cleaner nozzles with highly reactive steering hinges suffer from nervous steering behavior and instability when flat on the ground, leading to compromised functionality, especially when vacuuming under furniture, due to their design becoming less stable at reduced angles.
Innovation Solution
A vacuum cleaner nozzle with a steering hinge arrangement featuring first and second steering hinges, where the transmission ratio increases with the steering angle, with the second hinge engaging only after the first hinge reaches its maximum angle, providing a more aggressive steering response and enhanced stability by using a spring force and distinct angular mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a highly reactive steering hinge is used to enable small user input to result in large steering response, then steering responsiveness is improved, but the nozzle becomes unstable and exhibits nervous steering behavior when flat on the ground
Solution Approach 1:
The steering hinge is divided into two separate hinges (first steering hinge and second steering hinge) that operate at different angular ranges. The first hinge handles steering from 0 to 45 degrees with a first transmission ratio, while the second hinge handles steering from 45 to 90 degrees with a higher second transmission ratio. This segmentation allows the system to provide high responsiveness when needed while maintaining stability when flat.
Solution Approach 2:
The steering system dynamically transitions between two different transmission ratios based on the steering angle. When the steering angle is less than 45 degrees, the first transmission ratio applies; when the steering angle exceeds 45 degrees, the second transmission ratio with higher reactivity applies. This dynamic adjustment optimizes both stability during normal operation and responsiveness during active steering.
2Ease of operation
If a very reactive hinge is implemented to reduce the effort needed for steering, then ease of steering is improved, but the hinge architecture becomes less stable when the tube angle to the ground decreases
Solution Approach 1:
Different parts of the steering range are assigned different transmission ratios tailored to their specific requirements. The first steering hinge provides a moderate transmission ratio suitable for small-angle steering and stable operation, while the second steering hinge provides a higher transmission ratio for large-angle steering. This local optimization ensures each hinge operates in its optimal performance zone.
3Speed
If the transmission ratio is increased to improve steering response, then steering agility is improved, but the nozzle rotates freely during flat use compromising functionality
Solution Approach 1:
The system dynamically switches between two transmission ratios based on the operating condition. During flat use (steering angle less than 45 degrees), the first transmission ratio with lower value maintains stability and prevents free rotation. During active steering operations (steering angle greater than 45 degrees), the second transmission ratio with higher value provides rapid steering response and high agility.
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 design enhances steering responsiveness while maintaining stability, allowing for effective maneuverability both on flat surfaces and under furniture without unnecessary rotation, improving overall vacuuming performance.
Implementation Method 1
A spring force exercised by a spring between the second steering hinge and the body may hamper the second steering hinge from being fully engaged before the first steering hinge has reached the first steering angle.
Data Source
Figure 1~2A
Figure 2B~2C
AI summary
A vacuum cleaner nozzle (N) has a steering hinge arrangement (H1, H2) between a body (B) of the vacuum cleaner nozzle (N) and a connector (C) that is connectable to a unit having a handle, wherein the steering hinge arrangement (H1, H2) comprises first (H1) and second (H2) steering hinges, the first steering hinge (H1) being operational until a first steering angle, and the second steering hinge (H2) being operational from the first steering angle, a transmission ratio of the second steering hinge (H2) exceeding a transmission ratio of the first steering hinge (H1). As a result, a transmission ratio of the steering hinge arrangement (H1, H2) increases with an increasing steering angle also when the unit is substantially flat. The first steering angle may be determined by edges (E) on the first steering hinge (H1) interacting with a protrusion (P) on the second steering hinge (H2). A force exercised by a spring (S) between the second steering hinge (H2) and the body (B) may hamper the second steering hinge (H2) from being fully engaged before the first steering hinge (H1) has reached the first steering angle. The first steering hinge (H1) may be mounted at a larger angle with respect to a longitudinal axis of the connector (C) than the second steering hinge (H2). A vacuum cleaner advantageously comprises such a vacuum cleaner nozzle (N).