X-ray Tube Stroke Control Device with Mechanical Stopper
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Solution Overview
Problem
Existing stroke control systems for X-ray tubes in medical X-ray photograph systems face difficulties in adjusting the stroke range conveniently and ensuring a desired movement stroke, particularly due to mechanical switches and grating scales that are cumbersome and occupy large spaces.
Innovation Solution
A stroke control device with a first driving mechanism for linear carrier movement, a stopper with linear movement capability, and second driving mechanism using synchronous pulleys or sprockets and chains to adjust the stroke range by triggering limit switches, allowing for compact and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a grating scale is used for detecting stroke, then measurement precision is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent replaces the electrical/electronic grating scale detection system with a purely mechanical stroke control system. The mechanical stopper with adjustable positioning directly controls the carrier stroke through mechanical contact with limit switches, eliminating the need for complex grating scale assemblies and their associated electronics, while maintaining adequate measurement precision for the application.
Solution Approach 2:
The patent extracts and removes the grating scale component from the system, replacing it with a simpler mechanical stopper-based control mechanism. This extraction eliminates the space-consuming grating scale while retaining the essential function of stroke detection and control through the stopper's mechanical interaction with the system.
2Reliability
If mechanical switches are used for limit control, then reliability is improved, but ease of operation deteriorates due to difficult adjustment
Solution Approach 1:
The patent introduces dynamic adjustability to the mechanical stopper system. The stopper's position can be easily modified along the carrier's path, allowing flexible stroke adjustment while maintaining reliable mechanical limit control. This dynamic positioning capability resolves the contradiction by enabling both reliable control and easy operation through straightforward repositioning of the stopper.
Solution Approach 2:
The patent implements preliminary positioning of the stopper at desired stroke limits before operation begins. The adjustable stopper can be pre-set to the required positions, and limit switches can be pre-positioned, allowing for convenient stroke adjustment without complex procedures during operation, thereby improving ease of operation while maintaining reliability.
3Ease of manufacture
If a synchronous belt transmission is used, then ease of manufacture is improved, but manufacturing precision may deteriorate due to belt elasticity
Solution Approach 1:
The patent addresses the elasticity issue by carefully selecting and adjusting parameters of the synchronous belt system, including belt tension, belt material properties, and pulley dimensions. By optimizing these parameters, the system achieves adequate synchronization precision for the application while retaining the manufacturing advantages of belt-driven transmission over more rigid alternatives.
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 convenient adjustment of the stroke range and ensures a desired movement stroke effectively, with a simple and lightweight structure that maintains precise control without desynchronization.
Implementation Method 1
The input member is a synchronous pulley, and the output member is a synchronous belt. The second driving mechanism may further include a driven pulley, where the synchronous belt is tensioned on the synchronous pulley and the driven pulley
Implementation Method 2
The input member is a sprocket, the output member is a chain, and the second driving mechanism further includes a driven sprocket. The chain may be tensioned on the sprocket and the driven sprocket
Implementation Method 3
The input member may be a gear, which is fixed on the rotating shaft. The output member may be a rack that meshes with the gear
Data Source
AI summary
A stroke control device includes a first driving mechanism driving a carrier into a linear movement, the first driving mechanism comprising a rotating shaft arranged rotatably on a main body for receiving power input, a stopper being configured to move linearly, first and second limit switches defining a linear movement stroke of the stopper, and a second driving mechanism for driving the stopper into a linear movement, wherein the second driving mechanism includes an input member rotating synchronously with the rotating shaft and an output member on which the stopper is fixed, wherein the linear movement stroke of the stopper is less than the linear movement stroke of the carrier, and wherein the first and second limit switches are provided on the main body with a spacing therebetween and are both arranged on a path of the linear movement of the stopper.