Electric Actuator Damper Rod for Shock-Resistant Construction Equipment
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Solution Overview
Problem
Construction equipment with electric actuators faces challenges in absorbing shocks similar to traditional hydraulic cylinders, leading to potential deformation, wear, or breakage during operations like digging or dumping.
Innovation Solution
Integration of electric actuators with a damper rod mechanism, comprising imbricated cylinders or compression springs, to absorb shocks and protect sensitive components, allowing for energy recovery through regenerative braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If electric cylinders are used to replace hydraulic cylinders, then the construction equipment becomes fully electric and quieter, but the equipment becomes vulnerable to shock-induced deformation, wear, or breakage
Solution Approach 1:
The patent introduces a shock absorption device with compressible elements (springs or hydraulic cylinders) positioned between the electric cylinder and the construction equipment structure. These elements are pre-configured to compress and absorb shock energy before it reaches the electric cylinder, preventing deformation, wear, or breakage of sensitive components while maintaining the fully electric architecture
Solution Approach 2:
The shock absorption device acts as an intermediary element between the electric cylinder and the external environment. This mediator absorbs and dissipates shock energy through compression of springs or hydraulic fluid, protecting the electric cylinder from direct exposure to harmful shock forces while allowing the electric system to remain fully functional
2Reliability
If hydraulic cylinders are used, then shock absorption is achieved through oil compression, but the equipment cannot achieve full electrification
Solution Approach 1:
The patent replaces the hydraulic power system with an electric motor-driven system. The electric motor drives a screw mechanism that moves the electric cylinder, eliminating the need for hydraulic pumps and oil-based shock absorption. The shock absorption function is maintained through mechanical springs or mini hydraulic cylinders positioned at strategic points, achieving full electrification while preserving shock protection
Solution Approach 2:
The patent changes the fundamental operating parameter from hydraulic fluid compression to electric motor control. The electric motor can precisely control the movement and force application of the electric cylinder, while shock absorption is handled by mechanical springs or small hydraulic elements. This parameter change enables full electrification while maintaining reliable shock absorption capability
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
The solution provides robust and efficient shock absorption, maintaining performance and durability similar to hydraulic systems while enabling fully electric construction equipment with reduced mechanical stress on electric motors and mechanisms.
Implementation Method 1
a damper rod (18) configured for absorbing shocks to which the construction equipment is exposed
Implementation Method 2
comprising imbricated cylinders or compression springs
Implementation Method 3
energy recovery can be applied through the electric motor acting as generator
Data Source
AI summary
A construction equipment is provided with at least one electric actuator including an electric motor and a mechanism for transmitting the torque of the electric motor to an element of the construction equipment, such as boom, dipper or tool, in order to move it in desired direction, wherein said mechanism includes a damper rod.