Cordless Hydraulic Electric Tool With Partitioned Pump Sealing
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Solution Overview
Problem
Existing electric tools with hydraulic systems for live-line jobs face complications in routing piping and wiring, are prone to dust and air ingress, and require cumbersome maintenance, affecting operability and reliability.
Innovation Solution
A cordless electric tool design featuring a hydraulic system with a partitioned hydraulic part, a battery-powered motor, and a detachable tool head, which reduces the need for routing and prevents dust/air ingress, ensuring stable and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic pressure is used to obtain sufficient driving force, then driving force is improved, but routing of piping and wiring becomes complicated and maintenance becomes burdensome
Solution Approach 1:
The patent combines the hydraulic hose and power cord into a single integrated cable assembly that is routed together through the hollow rod part. This merging of separate routing paths into one unified structure simplifies the overall routing complexity while maintaining sufficient driving force through the hydraulic system.
Solution Approach 2:
The patent nests the hydraulic hose inside the hollow rod part, utilizing the internal space of the rod structure. This nesting approach allows the hydraulic piping to be contained within the existing structural element, eliminating the need for separate external routing and reducing overall system complexity.
2Force
If hydraulic hose and power cord are coupled to working vehicle, then driving force is sufficient, but routing of piping and wiring is complicated
Solution Approach 1:
The patent extracts the coupling operation to the working vehicle by providing quick-connect couplers at the tool end. This allows the hydraulic hose and power cord to be easily connected and disconnected at the tool rather than requiring complex routing back to the vehicle, significantly reducing operator burden while maintaining sufficient driving force.
Solution Approach 2:
The patent implements detachable couplers that allow the hydraulic and electrical connections to be dynamically connected or disconnected as needed. This dynamic connection capability enables easy tool attachment and detachment without permanent routing, reducing operational burden while ensuring sufficient driving force when connected.
3Force
If hydraulic line is used, then driving force is sufficient, but dust or air may enter and maintenance work becomes burdensome
Solution Approach 1:
The patent introduces a partition wall as an intermediary element within the hydraulic chamber. This partition creates separate compartments that prevent dust and air from entering the hydraulic pump while still allowing the hydraulic oil to function properly. The partition acts as a barrier that maintains contamination prevention while preserving the sufficient driving force of the hydraulic system.
Solution Approach 2:
The patent segments the hydraulic chamber into multiple compartments using partition walls. This segmentation isolates the hydraulic pump from potential contamination sources, preventing dust and air ingress while maintaining the hydraulic system's driving force capability. The divided structure allows independent protection of critical components.
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 design provides stable, highly reliable operation with reduced operator burden by eliminating the need for routing and maintaining hydraulic lines, while ensuring efficient and safe hydraulic force delivery.
Implementation Method 1
a battery for supplying power to the motor
Implementation Method 2
a motor for driving the hydraulic pump
Implementation Method 3
a hydraulic pump for feeding hydraulic oil inside the oil tank to the hydraulic part
Implementation Method 4
The tool head is operated by hydraulic force of a piston
Implementation Method 5
a first spring built-in to bias the piston in a direction toward the hydraulic pump
Implementation Method 6
the hydraulic part includes a second spring built-in to bias the partition in a direction toward the hydraulic pump
Data Source
AI summary
An electric tool is configured to obviate operation for routing piping and wiring, to prevent dust from entering a hydraulic pump. The electric tool having a main body and a tool head. The main body having a hydraulic part, an oil tank, a hydraulic pump for feeding hydraulic oil inside the oil tank to the hydraulic part, a motor for driving the hydraulic pump, and a battery for supplying power to the motor. The tool head is operated by hydraulic force of a piston; and a hollow rod part configured to couple the tool head with the main body. The tool head having a processing tool, and a cylinder part includes the piston. The cylinder part and the hydraulic part are connected by a tube part, and wherein the hydraulic part having a partition, and the partition reciprocates along a drive axis of the motor.