Pneumatic Hammer Damping Chamber Gas Spring
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Solution Overview
Problem
Pneumatic hammers cause significant vibrations and impacts on the operator's hands and arms, leading to discomfort and potential health hazards due to the recoil forces, which are difficult to control and dampen with existing pivotable handle designs.
Innovation Solution
A hand-held compressed air hammer with handles rigidly connected to the handle body and a working cylinder that forms a damping chamber, utilizing compressed air to create a gas spring effect, which opposes recoil forces and reduces vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If handles are made resiliently pivotable to reduce shock transmission, then vibration damping is improved, but control precision deteriorates
Solution Approach 1:
The patent introduces a damping chamber filled with damping material as an intermediary element between the working cylinder and the handle body. This mediator absorbs and dissipates vibration energy from the working cylinder before it reaches the handle body, protecting the operator's hands and arms from harmful vibrations while maintaining rigid handle connection for precise control
2Ease of operation
If handles are rigidly connected to improve control precision, then control precision is improved, but vibration transmission worsens
Solution Approach 1:
The patent segments the handle body into multiple parts: a first handle body portion rigidly connected to the working cylinder for precise control, and a second handle body portion connected through a damping chamber. This segmentation allows the first portion to maintain rigid connection for control precision while the second portion is protected from vibrations by the damping chamber
3Object-affected harmful factors
If damping chamber volume is reduced during impact, then vibration damping is improved, but device complexity worsens
Solution Approach 1:
The damping chamber is designed with dynamic volume characteristics - it has a larger volume in the rest position to accommodate damping material and provide damping capacity, and its effective volume is reduced during impact operations as the working cylinder moves into the handle body. This dynamic adaptation allows effective vibration damping without requiring complex active control mechanisms
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
Enables precise control and significant damping of vibrations, reducing the burden on the operator's arms and hands by providing a progressively acting counterforce during impact operations.
Implementation Method 1
At least one damping chamber (3) is formed by the geometric shape of the handle body (1) and working cylinder (2), in which damping material is arranged
Implementation Method 2
utilizing compressed air to create a gas spring effect, which opposes recoil forces and reduces vibration transmission
Data Source
Figure 1A~1B
Figure 2~4
Figure 5~7
AI summary
The air hammer has a cylindrical housing, also serving as the handle holding part (1) and accommodating the operating cylinder (2). When the cylinder (2) is axially moved inside the housing (1) a vibration compensating chamber (3) is formed which is transformed into a compression chamber when the cylinder (2) is moved towards the upper limit. A circular compression space (42) located between the outer surface of the cylinder (2) and the inner surface of the housing (1) is also created.