Pneumatic Tool Air Valve Structure for Shock Isolation and Pressure Relief
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Solution Overview
Problem
Conventional pneumatic tools cause discomfort and reduce work efficiency due to vibration transmitted to the user's hand when the piston strikes the air valve, leading to sore hands and injured wrists.
Innovation Solution
The pneumatic tool structure incorporates an air guide tube, a resilient element, and isolation rings to buffer the strike and isolate shock, featuring an air discharge conduit with equidistant discharging grooves on the isolation rings and a pressure relief groove to reduce vibration and release pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the piston strikes the air valve in a conventional pneumatic tool, then the reciprocating motion is achieved, but vibration is transmitted to the user's hand causing discomfort and injury
Solution Approach 1:
A resilient element (spring) is pre-installed in the air valve assembly to cushion the impact before the piston strikes the air valve. This beforehand cushioning absorbs the shock and reduces vibration transmitted to the user's hand, preventing discomfort and injury while maintaining the reciprocating motion function.
Solution Approach 2:
The resilient element acts as an intermediary between the piston and the air valve body. Instead of the piston directly striking the rigid air valve body, the resilient element mediates the impact, converting the direct mechanical shock into elastic deformation and damping vibrations before they reach the user's hand.
2Power
If the piston strikes the air valve with high force, then the reciprocating action is effective, but shock is transmitted causing sore hands and injured wrists
Solution Approach 1:
The resilient element is positioned to cushion the impact before the piston strikes the air valve body. This beforehand cushioning maintains the necessary strike force for effective reciprocating action while absorbing the harmful shock that would otherwise be transmitted to the user's hand and wrist.
Solution Approach 2:
The resilient element changes the mechanical parameters of the impact by converting a rigid, high-shock impact into a controlled elastic deformation process. This parameter change allows the strike force to remain effective for the reciprocating action while reducing the peak shock forces transmitted to the user.
3Duration of action of moving object
If the air valve is struck repeatedly, then the reciprocating motion continues, but pressure builds up causing abnormal operation
Solution Approach 1:
An air discharge conduit is provided to extract and discharge the accumulated high-pressure air from the air valve assembly. This prevents pressure buildup that would cause abnormal operation, allowing the reciprocating motion to continue normally for extended periods while maintaining reliable operation.
Solution Approach 2:
The air discharge conduit provides an alternative pathway for the high-pressure air, creating a parallel flow path that copies the function of the main air channel while specifically handling the pressure relief function to prevent abnormal operation during continuous use.
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 effectively reduces vibration and reaction force, enhancing user comfort and operational efficiency by isolating shock and releasing pressure, thus preventing soreness and injury to the user's hands and wrists.
Implementation Method 1
a resilient element (60) received in the slidable sleeve (20) and defined between the air intake head (10) and the screw bolt (33)
Implementation Method 2
a first isolation ring (70) fitted on an outer wall of the screw bolt (33) and located between the screw bolt (33) and the slidable sleeve (20), and a second isolation ring (80) fitted on an outer wall of the body (31) and located between the body (31) and the slidable sleeve (20)
Implementation Method 3
an air discharge conduit is defined between the slidable sleeve (20) and the body (31), the defining fringe (3112) has at least one pressure relief groove (3113)
Data Source
AI summary
A pneumatic tool structure contains an air intake head, a slidable sleeve, a drive unit, a piston, an operation element, a resilient element, a first isolation ring, and a second isolation ring. The air intake head includes a press lever, an air channel, and a connection portion. The connection portion has a first coupling orifice. The slidable sleeve includes a shoulder. The drive unit includes a body, a recessed portion having a defining fringe, a screw bolt, and a chamber. An air discharge conduit is defined between the slidable sleeve and the body. The first segment has a second coupling orifice. The resilient element includes a through hole. The first isolation ring includes a first rim, a second rim, multiple first discharging grooves, and multiple first contact portions. The second isolation ring includes a third rim, a fourth rim, multiple second discharging grooves, and multiple second contact portions.