Service Robot Retractable Wheel Mechanism
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Solution Overview
Problem
Current service robots have a fixed working position and poor flexibility due to their complex structure and inability to adjust their wheel position, which limits user experience.
Innovation Solution
A service robot design that includes a motor, transmission mechanism, and wheel within a base, allowing the wheel to retract into or extend out of the base using a screw and nut mechanism, driven by a motor with travel switches and limiting members for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wheel is fixedly mounted on the base, then the structure is simple and stable, but the working position cannot be adjusted and flexibility is poor
Solution Approach 1:
The patent applies the dynamics principle by making the wheel position adjustable rather than fixed. The transmission mechanism enables the wheel to move between a retracted position (for stable placement on surfaces) and an extended position (for rolling movement), transforming a static structure into a dynamic one that adapts to different working conditions.
Solution Approach 2:
The patent implements the nesting principle by allowing the wheel to be stored within the base cavity when retracted. The wheel can be nested inside the base structure, maximizing space utilization and maintaining a compact form factor when the wheel is not in use, while still being accessible when needed.
2Adaptability or versatility
If the wheel can extend out of the base, then the robot can roll and move, but the stability on flat surfaces is reduced
Solution Approach 1:
The patent uses the dynamics principle to create two distinct operational states: a stable state where the wheel is retracted into the base for flat surface placement, and a mobile state where the wheel is extended for rolling movement. The transmission mechanism enables smooth transitions between these states, allowing the robot to optimize for either stability or mobility as needed.
3Adaptability or versatility
If a transmission mechanism is added to move the wheel, then the wheel position can be adjusted, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical transmission systems with a simplified motor-driven screw mechanism. The motor rotates the screw, which converts rotational motion into linear motion of the nut, thereby moving the wheel in and out of the base. This substitution reduces mechanical complexity while maintaining the desired adjustability function.
4Stability of the object's composition
If the wheel retracts into the base, then the robot can be stably placed on surfaces, but the ability to move and change position is limited
Solution Approach 1:
The patent implements dynamics by enabling the wheel to switch between retracted and extended positions based on operational needs. When retracted, the robot provides stable placement on surfaces; when extended, it enables easy rolling movement and position changes. The motor-driven transmission mechanism facilitates smooth transitions between these states.
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 service robot to be stably placed on surfaces or roll on the ground, enhancing user flexibility and competitiveness by allowing automatic wheel retraction and extension.
Implementation Method 1
the screw is fixedly connected with the motor, and the wheel is mounted on a lower end surface of the nut; after the motor is started, the motor drives the screw to rotate, and the screw drives the nut to move up and down while the screw is rotating
Data Source
AI summary
A service robot and a method for controlling the same are disclosed. The service robot comprises a main body (101) and a base (102). A motor (1021), a transmission mechanism (1022) and a wheel (1023) are provided in an inner cavity of the base (102). The transmission mechanism (1022) is connected with the motor (1021) and the wheel (1023) respectively. The wheel (1023) is disposed below the transmission mechanism (1022). A space for the transmission mechanism (1022) to move up and down is formed in the inner cavity of the base (102). After the motor (1021) is started, the transmission mechanism (1022) is driven to move in the inner cavity of the base (102, 26) according to a predetermined stroke, and the transmission mechanism (1022) drives the wheel (1023) while the transmission mechanism (1022) is moving so that the wheel (1023) can retract into the inner cavity of the base (102) or extend out of the inner cavity of the base (102).