Fluid Cylinder Layout for Rotary Stroking With Lower Power
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Solution Overview
Problem
Conventional air-bearing cylinders face issues with increased power consumption and complexity in achieving a compact configuration for rotating shaft members, as they rely on motor-driven mechanisms that generate heat and complicate mechanical rotation.
Innovation Solution
A fluid cylinder design that separates rotary and stroke drivers within the cylinder body, utilizing fluid pressure to enable axial movement and rotation of the shaft member, with a piston and piston rods, and a rotary drive body, allowing for accurate stroking and rotation with reduced power consumption and a compact configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a motor is used to rotate the shaft member, then the shaft member can be rotated, but power consumption increases and heat generation occurs
Solution Approach 1:
The patent replaces the motor-driven mechanical rotation system with a fluid-pressure-driven rotation system. The rotary driver uses fluid pressure to rotate the rotary drive body, which in turn rotates the shaft member through the rotary drive shaft, eliminating the need for motors and reducing power consumption and heat generation.
Solution Approach 2:
The patent employs pneumatic principles by using fluid pressure to drive both the stroke driver (for axial movement) and the rotary driver (for rotation). The fluid pressure is transmitted through fluid passages to actuate the piston and rotary drive body, providing a compact and efficient drive mechanism without motors.
2Device complexity
If a motor-driven rotation mechanism is used, then the shaft member can be rotated, but the configuration becomes complicated and cannot be made compact
Solution Approach 1:
The patent merges the stroke drive function and rotation drive function into a single integrated fluid pressure system. Both the piston (for stroking) and the rotary drive body (for rotation) are actuated by the same fluid pressure source through separate fluid passages, reducing overall system complexity and enabling a compact configuration.
Solution Approach 2:
The patent implements a nested structure where the rotary driver and stroke driver are arranged concentrically within the cylinder body. The rotary drive body is positioned around the piston rod, and both drivers share the same cylindrical space, maximizing space utilization and achieving a compact configuration.
3Device complexity
If the rotary driver and stroke driver are integrated in the same space, then the configuration is compact, but the fluid pressure control becomes complex
Solution Approach 1:
The patent segments the fluid pressure control system into separate fluid passages for the stroke driver and rotary driver. The first fluid passage supplies fluid pressure to the piston for axial movement, while the second fluid passage supplies fluid pressure to the rotary drive body for rotation. This segmentation allows independent control of each driver while maintaining a compact spatial arrangement.
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 fluid cylinder achieves accurate rotational stroke with reduced power consumption and a compact configuration by using fluid pressure to drive both rotation and axial movement, outperforming motor-driven systems in efficiency and mechanical simplicity.
Implementation Method 1
a first piston rod provided at a front end of the piston and capable of protruding out of the cylinder body in accordance with the shaft member stroking
Implementation Method 2
a rotary drive body; the cylinder body has provided therewithin a cylinder chamber into which the piston is capable of being inserted
Data Source
AI summary
In particular, an object is to provide a fluid cylinder allowing for accurate stroking while causing rotation with reduced power consumption and a compact configuration. The fluid cylinder of the present invention includes a cylinder body and a shaft member supported within the cylinder body and wherein the shaft member is capable of stroking in an axial direction while rotating by means of a fluid. A rotary driver that rotates the shaft member on the basis of a rotation pressure generated by the fluid and a stroke driver that causes the shaft member to stroke on the basis of a cylinder control pressure generated by the fluid are provided in separate areas within the cylinder body.