Structure for unifying motor for use with rear curtain and power trunk
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Solution Overview
Problem
Conventional rear curtain and power trunk systems in vehicles are independent, increasing production cost and weight, and have complex assembly processes with inconsistent opening and closing performance due to the use of gas lifters sensitive to environmental temperatures.
Innovation Solution
A unified motor structure using a single rotary motor and electromagnetic clutch connects the rear curtain and power trunk via trunk and curtain wires, eliminating the need for a gas lifter and simplifying the assembly process by using a coil spring and electromagnetic clutch to transmit driving force selectively to either system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent motors are used for rear curtain and power trunk systems, then each system can operate independently, but production cost and vehicle weight increase
Solution Approach 1:
The patent combines two independent motor systems (rear curtain motor and power trunk motor) into a single unified motor system. The unified motor includes a common drive shaft that can selectively transmit power to either the rear curtain wire or the power trunk wire through electromagnetic clutches, thereby reducing vehicle weight while maintaining independent operation capability of both systems
Solution Approach 2:
The unified motor is designed with multi-functionality to perform both rear curtain operation and power trunk operation. The electromagnetic clutch mechanism allows the single motor to selectively engage with different wire systems based on operational requirements, enabling one motor to fulfill the functions previously requiring two separate motors
2Reliability
If independent motors are used for rear curtain and power trunk systems, then each system can operate independently, but production cost increases
Solution Approach 1:
The patent combines two independent motor systems (rear curtain motor and power trunk motor) into a single unified motor system. The unified motor includes a common drive shaft that can selectively transmit power to either the rear curtain wire or the power trunk wire through electromagnetic clutches, thereby reducing production cost while maintaining independent operation capability of both systems
Solution Approach 2:
The unified motor is designed with multi-functionality to perform both rear curtain operation and power trunk operation. The electromagnetic clutch mechanism allows the single motor to selectively engage with different wire systems based on operational requirements, enabling one motor to fulfill the functions previously requiring two separate motors, thus reducing production cost
3Force
If gas lifter is used in power trunk driving unit, then trunk lid can be supported, but opening and closing performance deteriorates due to sensitivity to environmental temperatures
Solution Approach 1:
The patent removes the gas lifter component from the power trunk driving unit and replaces it with a simplified structure consisting of a coil spring and electromagnetic clutch. This extraction eliminates the temperature sensitivity issue inherent in gas lifters while maintaining the necessary support force through the spring mechanism
Solution Approach 2:
The patent replaces the gas lifter mechanical system with a coil spring-based mechanical system. The coil spring provides consistent elastic force for trunk lid support regardless of environmental temperature, and the electromagnetic clutch provides reliable power transmission without the performance degradation associated with gas lifter temperature sensitivity
4Ease of operation
If conventional driving unit with multiple components is used, then trunk lid can be opened and closed, but assembly process becomes complex
Solution Approach 1:
The patent merges multiple components of the conventional driving unit (motor, wire, electromagnetic clutch) into a more integrated unified structure. The unified motor assembly reduces the number of separate parts and simplifies the assembly process while maintaining the functional capability of opening and closing the trunk lid
Solution Approach 2:
The patent removes complex components from the conventional driving unit, specifically eliminating the gas lifter and simplifying the overall structure. This extraction of unnecessary components directly reduces assembly complexity while preserving the essential trunk lid opening and closing functionality
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
This solution reduces vehicle production costs and weight, simplifies assembly, and ensures consistent trunk lid operation across varying temperatures, enhancing marketability by integrating the rear curtain and power trunk systems with a single motor and electromagnetic clutch.
Implementation Method 1
an electromagnetic clutch connected to a hinge arm of a trunk lid via a trunk wire and connected to a rear curtain via a curtain wire, the electromagnetic clutch being configured to selectively transmit driving force to the trunk wire or to the curtain wire
Data Source
AI summary
A structure for unifying a motor for use with a rear curtain and a power trunk is provided. The structure includes an electromagnetic clutch, which is connected to a hinge arm of a trunk lid via a trunk wire and is connected to a rear curtain via a curtain wire and selectively transmits driving force to the trunk wire or to the curtain wire. Additionally, a rotary motor is connected to the electromagnetic clutch and supplies driving force to the electromagnetic clutch. The trunk wire and the curtain wire are operated by a single rotary motor. Accordingly, the production cost and weight of a vehicle are reduced.