Pneumatic Saw Buffer Member Tubular Shock Absorption
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Solution Overview
Problem
Conventional pneumatic saws face limitations due to the space occupied by the metal member, which restricts the travel distance of the piston and the size of the buffer member, leading to reduced service life.
Innovation Solution
A pneumatic device with a cylinder, a buffer member, and a piston unit where the buffer member has a tubular wall with a length greater than its wall thickness, and an annular groove to absorb shock, allowing the piston unit to move between restoring and impact positions, effectively tolerating deformation and prolonging the buffer member's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a metal member is added to limit piston travel and buffer size, then the buffer member's service life is prolonged, but the device complexity and space occupation increase
Solution Approach 1:
The patent removes the metal member from the system entirely. Instead of using a metal member to limit piston travel and protect the buffer, the design relies on the buffer member's own tubular structure and the piston's controlled movement to achieve the same protective function, thereby simplifying the device while maintaining buffer service life
Solution Approach 2:
The tubular wall of the buffer member acts as an intermediary structure that absorbs and distributes the impact energy. The tubular design with length greater than wall thickness provides structural integrity while allowing controlled deformation, replacing the need for a separate metal protective member
2Volume of stationary object
If the buffer member size is reduced to save space, then the device compactness improves, but the shock absorption capacity decreases
Solution Approach 1:
The patent changes the geometric parameters of the buffer member, specifically designing a tubular wall where the length along the axis is greater than the wall thickness. This parameter configuration optimizes the strength-to-volume ratio, enabling the compact buffer to maintain adequate shock absorption capacity through controlled elastic deformation of the tubular structure
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 allows for effective shock absorption and prolonged service life of the buffer member by allowing the piston unit to impact the buffer member, reducing the compression ratio and extending its operational lifespan.
Implementation Method 1
the buffer member 14 serves to absorb the shock generated by the piston portion 122
Implementation Method 2
the buffer member has a tubular wall with a length along the axis that is greater than the wall thickness thereof
Implementation Method 3
the sealing member is in air-tight contact with an inner surrounding surface of the cylinder wall
Implementation Method 4
The piston unit is able to be driven pneumatically to move between a restoring position and an impact position
Data Source
AI summary
A pneumatic device includes a cylinder, a buffer member and a piston unit. The cylinder includes a cylinder wall defining an air chamber. The buffer member has a tubular wall that defines a communicating hole. The tubular wall has a length greater than the wall thickness thereof. The piston unit includes a sealing member, and a rod member movably extending through the communicating hole. The rod member has a driven section received within the air chamber and mounted with the sealing member. The piston unit is movable between a restoring position where the driven section is spaced apart from the buffer member, and an impact position where at least one of the driven section and the sealing member is in contact with the buffer member.