Surface Cleaning Machine Differential Drive for Safe Cornering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing self-propelled surface cleaning machines face challenges in achieving high driving safety and maneuverability while maintaining traction and climbing ability, particularly during cornering and varying terrain conditions.
Innovation Solution
The integration of a differential device for the rear wheel system, allowing different rotational speeds for the left and right rear wheels, combined with a control device that communicates with steering angle and velocity sensors to adjust driving conditions, enables high agility and maneuverability. Additionally, the use of electric motors for both the front and rear wheels provides emission-free operation and reduces the number of motors needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both front wheel and rear wheel device are driven to achieve high driving velocities and climbing ability, then driving safety and traction are improved, but device complexity increases
Solution Approach 1:
The drive system is segmented into a first drive device for the front wheel and a second drive device for the rear wheel device, allowing independent control of each wheel group. This segmentation enables the system to achieve high driving safety through coordinated control while managing complexity by dividing the drive functions into separate controllable units.
2Ease of operation
If a differential device is added to the rear wheel device to allow different rotational speeds for left and right rear wheels, then maneuverability and agility are improved, but device complexity increases
Solution Approach 1:
A differential device is integrated into the rear wheel device, enabling dynamic adjustment of rotational speeds between the left and right rear wheels. This dynamic capability significantly improves maneuverability and agility during cornering and on varying terrain, while the differential mechanism itself is a standardized component that manages the added complexity through proven design.
3Reliability
If individual control of first and second drive devices is implemented based on steering angle signals, then cornering performance and driving safety are improved, but control system complexity increases
Solution Approach 1:
The control device receives feedback signals from a steering angle sensor device and uses this information to individually adjust the operation of the first and second drive devices. This feedback mechanism ensures optimal cornering performance and driving safety by continuously adapting the drive forces based on the actual steering angle, while the automated feedback loop manages control complexity through systematic signal processing.
4Object-generated harmful factors
If electric motors are used for drive devices to achieve emission-free operation, then environmental performance is improved, but initial cost and weight increase
Solution Approach 1:
Electric motors are used to replace traditional internal combustion engine drive systems in both the front wheel and rear wheel device. This substitution eliminates harmful emissions and provides precise control capability, while the electric motor technology enables compact design that mitigates the weight penalty through high power-to-weight ratios.
Data Source
AI summary
A self-propelled surface cleaning machine is proposed, including a floor cleaning device, a steerable front wheel, a steering device associated with the front wheel, a rear wheel device having at least one left rear wheel and at least one right rear wheel, a first drive device for driving the front wheel, a second drive device for driving the rear wheel device and a differential device for the rear wheel device that allows different speeds of rotation for the at least one left rear wheel and the at least one right rear wheel.