Drive Wheel Braking Disengagement Switch With Channel State Detection
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Solution Overview
Problem
Existing drive wheel systems with direct electric motor connection face challenges in braking and disengagement, leading to safety issues and increased size when additional components are added for manual movement or towing, compromising compactness.
Innovation Solution
A braking disengagement switch with two disengagement channels and monitoring devices, using high-frequency signals to detect and control the state of the channels, allowing seamless disengagement and braking without mechanical interference, ensuring compactness and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a disengagement component is added between the electric motor and the drive wheel to enable manual movement or towing, then the vehicle can be moved without motor resistance, but the size of the motor-wheel assembly increases considerably
Solution Approach 1:
The electromagnet is integrated into the existing motor structure, allowing it to serve dual functions: as part of the motor assembly during autonomous operation and as a disengagement mechanism during manual movement or towing. This multi-functionality eliminates the need for separate dedicated disengagement components, thereby avoiding increased assembly size.
Solution Approach 2:
The disengagement function is merged with the motor structure by using the electromagnet to directly control the connection between the motor shaft and the drive wheel. This integration combines the motor and disengagement mechanisms into a unified structure, preventing additional volume increase.
2Reliability
If braking means are installed on the wheel or motor to enable safe stopping during autonomous operation, then braking capability is improved, but the system complexity and size increase when disengagement components are added
Solution Approach 1:
The braking function is extracted from the mechanical domain and implemented through electrical control. By using the electromagnet to control motor phase disconnection, braking is achieved through electrical means rather than adding separate mechanical braking components, thereby reducing overall system complexity.
Solution Approach 2:
Traditional mechanical braking means are replaced with an electrical braking mechanism controlled by the electromagnet. The electromagnet controls the connection and disconnection of motor phases to achieve braking效果, substituting mechanical braking components with an electrical control system that reduces overall complexity.
3Volume of moving object
If the electric motor is directly connected to the drive wheel for compact design, then the motor-wheel assembly size is reduced, but the wheel cannot be moved manually without experiencing motor resistance or damage
Solution Approach 1:
The connection between the motor shaft and drive wheel is made dynamic rather than static. The electromagnet enables the connection to be engaged or disengaged based on operational requirements, allowing the system to adapt between autonomous operation (connected) and manual movement (disconnected) modes while maintaining a compact structure.
Solution Approach 2:
The electromagnet is pre-integrated into the motor structure with its control circuitry in place, so that disengagement can be immediately activated when manual movement is required. This preliminary preparation allows rapid transition between operational modes without requiring additional components or complex assembly modifications.
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 safe and compact disengagement of the drive wheel from the electric motor, reducing braking torque and skidding, improving safety and enabling reliable odometry measurements during manual movement or towing.
Implementation Method 1
a first state transmitter connected to the first end of the first disengagement channel, configured to generate a state signal and to transmit the state signal between the first end of the first disengagement channel and a motor phase of the electric motor
Implementation Method 2
a first state receiver connected to the second end of the first disengagement channel, the first state receiver being configured to detect the state signal transmitted by the first state transmitter when the first disengagement channel is in the closed state
Data Source
AI summary
A braking disengagement switch for a drive wheel driven by a two-phase electric motor, the switch comprising a first disengagement channel connected at a first end to a phase of the motor and to a second phase of the motor at a second end, the first channel switching between an open state and a closed state, the switch comprising a device for monitoring the first channel, the monitoring device comprising: a first transmitter connected to the first end of the first disengagement channel, configured to inject a first state signal between the first end of the first disengagement channel and the motor phase of the electric motor; a first receiver connected to the second end of the first disengagement channel, configured to detect the first signal passing through the first channel when the first channel is in the closed state, the first receiver being configured to determine the state of the first channel.