Trolley Locking Brake with Motor Short-Circuit Position Holding
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Solution Overview
Problem
Current trolley braking systems are complex, cumbersome to operate, and prone to overheating, which can lead to uncontrollable movement and potential failure, posing safety risks.
Innovation Solution
A trolley locking brake device with an electric motor, encoder, control unit, and temperature monitoring system that maintains position through self-locking, disconnects the motor at critical temperatures, and includes an alternative braking mechanism for added safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous operation of the electric motor is used to maintain position, then positioning accuracy is improved, but the motor overheats leading to component failure and safety risks
Solution Approach 1:
The patent converts the harmful effect of motor overheating into a beneficial self-locking mechanism. When the motor is short-circuited due to overheating, the resulting electromagnetic braking effect actually helps maintain the trolley's position, turning a potential failure mode into a safety feature that prevents both overheating damage and positional drift.
2Stability of the object's composition
If the electric motor continuously compensates for external influences like gravity on slopes, then position stability is improved, but the motor overheats and may fail
Solution Approach 1:
The system transforms the harmful continuous operation that leads to overheating into a beneficial self-locking state. When the motor reaches critical temperature, the short-circuit condition creates electromagnetic braking that maintains position stability without requiring continuous active compensation, thereby preserving both position stability and motor reliability.
Solution Approach 2:
The motor system serves itself by utilizing its own overheating condition to generate the braking effect needed for position holding. The short-circuited motor automatically provides the necessary holding force without external intervention, making the system self-regulating and eliminating the need for continuous active control.
3Reliability
If complex braking systems are used to prevent overheating and ensure safety, then safety is improved, but the system becomes cumbersome and difficult to operate
Solution Approach 1:
The patent merges the positioning function and braking function into a single integrated system. The electric motor serves dual purposes: active positioning control during normal operation and passive self-locking braking when overheated. This consolidation eliminates the need for separate complex braking mechanisms while maintaining both positioning accuracy and safety.
Solution Approach 2:
The electric motor is designed to perform multiple functions: it acts as an actuator for position control during normal operation and as a self-locking brake when overheated. This multi-functionality reduces the overall system complexity and eliminates the need for separate dedicated braking components, thereby improving ease of operation while maintaining safety.
4Temperature
If the motor is disconnected from power supply to prevent overheating, then temperature control is improved, but the trolley may become uncontrollable on slopes
Solution Approach 1:
The patent converts the harmful complete loss of motor control due to power disconnection into a beneficial self-locking state. The short-circuit condition generates electromagnetic braking that maintains position stability even when the motor is disconnected from the power supply, thereby achieving both temperature control and position stability simultaneously.
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
Provides a user-friendly, reliable, and safe trolley locking system that prevents overheating and uncontrollable movement, ensuring stable positioning and enhanced user safety.
Implementation Method 1
A trolley (100) is proposed with a locking brake device (10). The locking brake device (10) has an electric motor (20) that acts on a wheel (110) of the trolley (100)
Implementation Method 2
The locking brake device (10) has an encoder (30) that is connected to the electric motor (20) and that detects a rotational movement of an electric motor (20)
Implementation Method 3
The locking brake device (10) has a temperature monitoring unit (50) that monitors a temperature of the electric motor (20)
Implementation Method 4
the control unit (40) is designed and suitable for short-circuiting the electric motor (20)
Implementation Method 5
The alternative braking device (60) acts on the wheel (110) of the trolley (100)
Data Source
Figure 1
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AI summary
The invention relates to a trolley locking brake device comprising at least one electric motor and an encoder operatively connected to the electric motor. Furthermore, a control unit and a temperature monitor are included. The temperature monitor and the control unit are operatively connected to the electric motor and encoder. The control unit is designed and suitable for holding the electric motor within a desired position range by means of the encoder. The temperature monitor monitors the temperature of the electric motor. Furthermore, the control unit of the trolley locking brake device is designed and suitable for short-circuiting the electric motor.