Rotation Drive Device Swing Arm Weight Radial Position Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotation drive devices require large fluid cylinders and high output to achieve significant rotating force, which is inefficient and limits the downsizing of components.
Innovation Solution
The rotation drive device incorporates a swing arm mechanism with a longer arm length for the weight and a shorter arm length for the fluid cylinder connection, allowing for controlled radial position changes of the weight using fluid pressure, and includes a tiltable base table to optimize gravitational force utilization, enabling larger rotating moments with reduced fluid cylinder stroke and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the stroke of the fluid cylinder is enlarged to increase the radial position change of the weight, then the rotating moment is improved, but the device size and complexity increase
Solution Approach 1:
The invention transforms the linear reciprocating motion of the fluid cylinder into rotational motion of the weight around the rotating shaft. By mounting the fluid cylinder on a rotating unit that rotates with the rotating shaft, the weight moves in a circular path, effectively converting a one-dimensional linear stroke into two-dimensional radial position control. This allows achieving large radial position changes without requiring proportionally large linear stroke from the fluid cylinder.
Solution Approach 2:
The invention makes the fluid cylinder itself rotate together with the rotating shaft and rotating table, transforming it from a stationary linear actuator into a dynamic rotating actuator. This dynamic configuration allows the fluid cylinder to control the weight's radial position while simultaneously participating in the rotational motion, thereby achieving enhanced rotating moment generation with reduced stroke requirements.
2Force
If the output of the fluid cylinder is increased to move heavier weights, then the rotating moment is improved, but the device complexity and size increase
Solution Approach 1:
By converting the fluid cylinder's linear motion into rotational motion of the weight, the invention creates a mechanical advantage through the rotational lever arm. The weight's circular path around the rotating shaft generates rotating moment more efficiently, reducing the force output requirement from the fluid cylinder while maintaining or enhancing the overall rotating moment.
Solution Approach 2:
The dynamic rotation of the fluid cylinder and weight system allows continuous utilization of gravitational force on the weight to generate rotating moment throughout the rotation cycle. This dynamic configuration improves the gravitational force utilization ratio, reducing the peak output requirement from the fluid cylinder compared to static linear reciprocating systems.
3Force
If the weight is made heavier to increase the rotating moment, then the rotating force is improved, but the fluid cylinder output requirement increases
Solution Approach 1:
The invention exploits the rotational dimension by positioning the weight to move in a circular path around the rotating shaft. This creates a continuous rotating moment arm that leverages the weight's gravitational force throughout the rotation, maximizing the rotating moment generation efficiency and reducing the required weight mass for a given rotating moment target.
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 enhances the rotating force by enlarging the radial position change of the weight while minimizing the fluid cylinder's stroke and output, improving the gravitational force utilization ratio and enabling greater rotating moments with reduced resistance.
Implementation Method 1
changes the radial position of the weight in each of the rotating units by sequentially supplying a fluid from a fluid supply source to the fluid cylinder of each of the rotating units
Implementation Method 2
rotating the rotating table and the rotating shaft on the basis of a fluctuation of a rotating moment which a gravitational force acting on the weight applies around the rotating shaft
Data Source
AI summary
In a rotation drive device (10), each of rotating units (20) has a swing arm (23) which is supported so as to be swingable around a swing center axis (23A) provided in a support table (22), a weight (24) is provided at a position at which a length of an arm from the swing center axis (23A) of the swing arm (23) is longer, and a connection point in a fluid cylinder (25) side is provided at a position at which the length of the arm from the swing center axis (23A) is shorter.