Pneumatic Tool Valve Layout for Impact-Stable Timing Control
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Solution Overview
Problem
Pneumatic tools using electromagnetic valves face challenges in controlling actuation timing, preventing malfunctions, and reducing power consumption, while maintaining operability and safety, due to the impact of mechanical components and inefficient wiring and arrangement of electric components.
Innovation Solution
The pneumatic tool incorporates an electromagnetic valve arranged on the opposite side of the body housing, relative to the grip housing, to minimize impact influence, and includes a control unit with a control substrate and power supply terminal positioned to reduce impact effects, allowing for precise timing control and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electromagnetic valve is arranged in a place that is easily affected by the impact, then the control of actuation timing is improved, but the reliability deteriorates due to component breakage or disconnection
Solution Approach 1:
The pneumatic tool is divided into two separate housings: the body housing containing the drive mechanism and the grip housing containing the electromagnetic valve and control components. This segmentation isolates the electromagnetic valve from impact zones while maintaining control functionality.
Solution Approach 2:
A connection structure (such as a flexible conduit or articulated linkage) is introduced between the body housing and grip housing to transmit pneumatic control signals and electrical connections without direct rigid coupling, thereby protecting the electromagnetic valve from impact while maintaining system integration.
2Reliability
If the electromagnetic valve is arranged away from the body housing to avoid impact, then the reliability is improved, but the device complexity increases due to additional wiring and arrangement requirements
Solution Approach 1:
The electromagnetic valve, control substrate, and power supply terminal are integrated into a unified control assembly housed within the grip housing. This merging of components reduces the number of separate connections and simplifies the overall wiring arrangement while maintaining reliability.
3Reliability
If a high load spring is used to prevent movable iron core movement due to impact, then the reliability is improved, but the power consumption increases and the electromagnetic valve enlarges
Solution Approach 1:
The movable iron core and spring mechanism are extracted from the impact-prone location and repositioned within the protected grip housing. This relocation eliminates the need for high-load springs while maintaining stability, thereby reducing power consumption and component size.
4Reliability
If the control substrate is set to energization state all the time to prevent malfunction, then the reliability is improved, but the power consumption increases
Solution Approach 1:
The control substrate is designed to operate in periodic cycles rather than continuous energization. The control unit activates the electromagnetic valve only when triggered by the operation unit (e.g., trigger pull), allowing the control substrate to enter a low-power standby state between operations while maintaining system readiness and reliability.
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 configuration enables precise control of actuation timing, reduces the risk of malfunctions, and minimizes power consumption by buffering impacts and optimizing the arrangement of electric components, enhancing both the operational efficiency and safety of the pneumatic tool.
Implementation Method 1
an electromagnetic valve configured to control supply of the compressed air to the drive mechanism
Data Source
AI summary
A pneumatic tool includes a drive mechanism configured to be actuated by a pneumatic pressure of compressed air, a body housing having the drive mechanism embedded therein, a grip housing connected to the body housing, and an electromagnetic valve configured to control supply of the compressed air to the drive mechanism, wherein the electromagnetic valve is arranged on an opposite side to the body housing, as seen in an extension direction of the grip housing.