Electric Tailgate Strut With Integrated Gas-Spring Damping
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Solution Overview
Problem
Traditional electric struts for automobile tailgates suffer from shaking during operation, especially in heavy vehicles, and single electric struts lack sufficient power for large tailgates, affecting user experience and smoothness.
Innovation Solution
An electric tailgate strut design featuring a telescopic rod with a thread tube, piston, and piston rod, driven by a motor through a gear box, allowing controlled rotation and movement, combined with a non-lockable gas spring for improved stability and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If PR+PR configuration scheme is used, then power is sufficient for heavy vehicles, but tailgate shakes during rising or falling process due to lack of damp construction
Solution Approach 1:
The patent combines the electric strut (PR) and pneumatic balance strut (FEBI) into a single integrated structure. The electric motor drives a screw actuator that extends or compresses the telescopic rod, while the gas spring provides damping force. This merging allows the system to achieve both sufficient power for heavy vehicles and smooth operation without shaking.
Solution Approach 2:
The integrated strut assembly performs multiple functions simultaneously: the electric motor provides driving force for opening/closing, the gas spring provides damping to reduce shaking, and the telescopic rod provides structural support. This multi-functionality resolves the contradiction by combining the advantages of both PR and FEBI configurations into one component.
2Stability of the object's composition
If a single electric strut is used, then smoothness of tailgate operation is improved, but power is insufficient for heavy vehicles with large tailgate mass
Solution Approach 1:
The patent merges the electric motor-driven telescopic rod with the gas spring into a single integrated strut. The electric motor provides sufficient power for heavy vehicles, while the gas spring maintains smooth operation. This combination allows one strut to perform the work of multiple struts without sacrificing smoothness.
3Device complexity
If traditional electric struts are used without damp construction, then device complexity is reduced, but tailgate shakes during operation affecting user experience
Solution Approach 1:
The patent integrates the damping function directly into the electric strut structure by combining the gas spring with the motor-driven telescopic rod. This merging adds damping capability without requiring separate dampers or complex additional components, thus maintaining relatively simple device structure while improving stability.
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
Enhances smooth operation and stability by reducing motor load and increasing thrust, while providing waterproof and dustproof protection, ensuring a seamless tailgate opening and closing experience.
Implementation Method 1
gas spring, which is arranged inside the telescopic rod and is included of thread tube with thread on outer wall, piston and piston rod
Implementation Method 2
thread tube with thread on outer wall, piston and piston rod, wherein distance between piston rod as well as inner tube remains constant
Implementation Method 3
thread tube with thread on outer wall
Data Source
AI summary
An electric tailgate strut for automobiles includes telescopic rod, gas spring, nut and driving unit. Telescopic rod includes outer tube and inner tube, wherein the outer tube can move along the axial direction of inner tube. Gas spring is arranged inside the telescopic rod and is included of thread tube, piston and piston rod, wherein distance between piston rod and inner tube remains constant, wherein piston is located at the free end of piston rod and in the sliding seat with inner wall of thread tube, wherein seal guide assembly is provided between piston rod and thread tube. Driving unit serves to drive thread tube in the rotation. Thread tube is driven to rotate by motor, so that outer tube can move along axial direction of inner tube to achieve rise or fall of strut. Thread tube itself, piston rod and piston form a gas spring.