Pullback Model Car Steering Mechanism for Dynamic Path Control
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Solution Overview
Problem
Conventional pull-back and wind-up model cars are limited to straight-line motion and lack the ability to steer, offering little realism in their operation, as they do not allow for dynamic cornering or varying path directions during propulsion.
Innovation Solution
A coupling/decoupling mechanism is introduced between the spring mechanism and the steering gear, enabling the activation or deactivation of the steering function for steerable wheels, allowing the model car to perform variable cornering with dynamically changing path radii and directions, using a deflection mechanism that converts stored spring energy into rotational and linear steering movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the spring mechanism is used to propel the model car, then the model car can achieve propulsion and movement, but the model car is limited to straight-line motion and cannot steer
Solution Approach 1:
The patent combines the spring propulsion mechanism with a steering mechanism into a single integrated system. The spring mechanism not only provides propulsion but also powers the steering through a shared transmission system, allowing the model car to perform both straight-line motion and steering functions using the same energy source.
Solution Approach 2:
The patent introduces a dynamic steering mechanism that allows the front wheels to be steerable during propulsion, transforming the static straight-line motion into dynamic curved path traversal. The steering angle can be adjusted during operation, enabling the model car to follow curved trajectories rather than being confined to straight lines.
2Adaptability or versatility
If the front wheels are set to a specific steering angle in advance, then the model car can drive on a circular path, but the steering angle is fixed and cannot be adjusted during propulsion
Solution Approach 1:
The patent transforms the fixed steering angle mechanism into a dynamic one where the steering angle can change during propulsion. The steerable front wheels are connected to the spring mechanism through a transmission system that allows continuous adjustment of the steering angle, enabling the model car to adapt its path in real-time rather than following a predetermined circular trajectory.
Solution Approach 2:
The patent introduces a transmission mechanism as an intermediary between the spring propulsion system and the steerable wheels. This transmission system acts as a mediator that converts the linear spring force into rotational motion for both propulsion and steering, allowing independent control of the steering angle during operation.
3Adaptability or versatility
If a deflection mechanism is added to enable cornering, then the model car can steer during propulsion, but the structure becomes more complex
Solution Approach 1:
The patent merges the deflection mechanism with the existing spring propulsion system, so that the same spring mechanism that provides propulsion also powers the steering through a shared transmission system. This integration reduces the need for separate independent mechanisms and consolidates the overall system complexity.
Solution Approach 2:
The spring mechanism is designed to serve multiple functions: it provides both the propulsive force for forward motion and the energy for steering through the transmission system. This multi-functionality reduces the need for additional dedicated mechanisms, thereby limiting the increase in overall system complexity despite adding cornering capability.
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
Enables the model car to traverse complex paths such as S-shaped, 8-shaped, or circular trajectories with varying radii, providing a more realistic operation by allowing dynamic steering adjustments during propulsion, while maintaining the ability to drive straight or on fixed circular paths when the steering function is deactivated.
Implementation Method 1
The spring mechanism includes at least one spring element that can be tensioned before the model car is operated. The spring element includes, for example, a spiral spring, a rubber band or the like.
Implementation Method 2
The deflection mechanism includes a deflection gear that is designed to convert part of the energy stored in the tensioned spring mechanism into a rotational movement that is used to steer the at least one steerable wheel of the model car.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
The invention relates to a pull-back or wind-up model car. This comprises a chassis (1) with at least three wheels (102, 105) rotatably mounted on it and a tensionable spring mechanism (101) which is in rotational connection with at least one of the wheels (102) to drive it. The energy stored in the tensioned spring mechanism (101) serves to drive the at least one driveable wheel (102) and to propel the model car while it is standing on a surface. It is proposed that the model car has at least one steerable wheel (105) articulated to the chassis (1) about a steering axis (104), and a deflection mechanism (2) which is operatively connected to the spring mechanism (101) such that a portion of the energy stored in the tensioned spring mechanism (101) can be used to steer the at least one steerable wheel (105) during the propulsion of the model car.