Electric Plate Compactor Attachment Without Hydraulic Leakage
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Solution Overview
Problem
Hydraulically driven soil compaction devices suffer from poor efficiency, controllability, and risk of hydraulic oil leakage, and existing solutions with permanent couplings are cumbersome to detach.
Innovation Solution
A mobile soil compaction system with an electrically driven attachment tool featuring an unbalance exciter powered by an electric motor, which can be detachably connected to a working machine via a mechanical and electrical interface, allowing for synchronized unbalance shafts to generate vertical compaction forces while minimizing horizontal forces, and utilizing an electrical energy storage device for power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulically driven compactors are used, then high performance can be achieved independently of power grid, but efficiency and controllability deteriorate
Solution Approach 1:
The patent replaces the hydraulic drive system with an electric motor drive system. The electric motor directly drives the unbalance exciter, eliminating the need for hydraulic motors and fluid power transmission. This substitution improves efficiency and controllability while maintaining the ability to operate independently of the power grid through battery power supply.
Solution Approach 2:
The patent changes the power transmission medium from hydraulic fluid to electrical energy. By using electric motors with variable speed control, the system achieves better efficiency and controllability parameters compared to fixed-speed hydraulic drives. The electric drive allows for precise control of motor speed and torque, optimizing the compaction process.
2Reliability
If hydraulically driven compactors are used, then high performance can be achieved independently of power grid, but risk of hydraulic oil leakage and environmental damage increases
Solution Approach 1:
The patent eliminates the hydraulic system entirely by substituting it with an electric motor drive. This removal of hydraulic components (pumps, hoses, motors) completely eliminates the risk of hydraulic oil leakage and associated environmental damage, while maintaining off-grid operation capability through battery power.
3Stability of the object's composition
If permanently coupled compressors are provided, then structural stability is improved, but ease of detachment deteriorates
Solution Approach 1:
The patent divides the compaction system into separable modules: the attachment tool with electric motor and unbalance exciter can be detached from the working machine. This segmentation allows the attachment to be easily removed and replaced with other tools, while maintaining structural stability during operation through proper coupling mechanisms.
Solution Approach 2:
The patent introduces dynamic configurability to the system, allowing it to transition between coupled and detached states. The attachment tool can be quickly coupled to or decoupled from the working machine, providing operational flexibility while maintaining structural integrity during the coupled state through appropriate mechanical connections.
4Productivity
If electric drive is used, then efficiency and controllability are improved, but device complexity increases
Solution Approach 1:
The patent extracts the electric motor and battery system from the traditional hydraulic configuration. By removing the complex hydraulic pump, reservoir, valves, and hoses, the overall system complexity is reduced despite the addition of electric components. The electric drive system requires fewer moving parts and maintenance points than the hydraulic system it replaces.
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 system achieves significant energy savings, improved controllability, and eliminates the risk of hydraulic oil leakage, with cleaner and simpler connections, enhancing the efficiency and operational convenience of soil compaction.
Implementation Method 1
an unbalance exciter (18) that applies unbalance forces to the ground contact plate (19)
Implementation Method 2
an electric drive, in particular an electric motor, for powering the unbalance exciter (18)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An attachment tool (2) for mounting on a working machine (1) is specified, comprising a ground contact plate (19) for compacting soil, an unbalance exciter (18) acting on the ground contact plate (19) with unbalance forces, an electric drive for driving the unbalance exciter (18), a mechanical coupling device (14) for coupling the attachment tool to the working machine (1), and an electrical power interface (21) for coupling to an electrical power supply.