Balanced Automatic Door With Linear Motor for Quiet Operation
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Solution Overview
Problem
Existing automatic balanced doors with rotary electric motors are complex, prone to maintenance issues due to wear, generate vibrations leading to high noise levels, and require significant space for operation.
Innovation Solution
An automatic balanced door mechanism utilizing a linear motor with a compact, integrated operation system inside the running profile, eliminating the need for magnetic attraction, manual initiation, and external space, while using a controlled electromagnetic and magnetic interaction to achieve smooth, silent, and maintenance-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If rotary electric motors with transmission mechanisms are used to operate the door, then the door can be automated, but the device complexity increases due to multiple interconnected components requiring maintenance
Solution Approach 1:
The patent replaces the rotary electric motor with a linear motor that directly propels the door leaf along the guide rail without mechanical transmission components. This substitution eliminates gears, belts, chains, and connecting rods, reducing device complexity while maintaining automated operation capability
Solution Approach 2:
The invention extracts and removes the transmission mechanism from the door operating system, keeping only the essential linear motor and guide rail components. This extraction simplifies the overall structure by eliminating intermediate transmission elements that contribute to complexity and maintenance requirements
2Extent of automation
If rotary electric motors with transmission mechanisms are used, then automated operation is achieved, but maintenance requirements increase due to wear and tear of components
Solution Approach 1:
The linear motor replaces the rotary motor and transmission system, eliminating components subject to wear such as gears, belts, and chains. This substitution directly reduces maintenance requirements by removing parts that need periodic adjustment and replacement due to wear and tear
Solution Approach 2:
The linear motor system is designed to be inherently maintenance-free, with no moving parts that require lubrication or adjustment. The system serves itself by eliminating the need for external maintenance interventions through its simplified direct-drive architecture
3Measurement precision
If rotary electric motors are used to control fine door movement, then precise control is possible, but the control complexity increases due to need for multiple sensors and gear reduction mechanisms
Solution Approach 1:
The linear motor provides direct linear motion control without requiring gear reduction mechanisms. This substitution simplifies the control system by eliminating the need for multiple sensors and complex mechanical reduction gears, achieving precise position control through direct electromagnetic actuation
Solution Approach 2:
The invention extracts and removes the gear reduction mechanism and multiple sensor system from the control architecture. By using the linear motor's inherent ability to provide precise linear motion, the system eliminates the need for complex control components while maintaining measurement precision
4Ease of operation
If rotary electric motors and transmission mechanisms are used, then door operation is achieved, but noise levels increase due to vibrations from motors and transmission elements
Solution Approach 1:
The linear motor replaces the rotary motor and transmission system, eliminating the mechanical components that generate vibrations and noise. This substitution directly reduces noise levels by removing the sources of mechanical vibration while maintaining full door operation capability
Solution Approach 2:
The invention extracts and removes the transmission elements (gears, belts, chains, connecting rods) that are sources of vibration and noise. By eliminating these components, the system achieves quiet operation while preserving the ability to open and close the door effectively
5Ease of operation
If rotary electric motors with reduction gears are used, then door movement control is achieved, but the device occupies more space due to bulky transmission mechanisms
Solution Approach 1:
The linear motor replaces the rotary motor and reduction gear system, eliminating the bulky mechanical transmission components. This substitution reduces the space occupied by operating mechanisms while maintaining full door movement control capability through direct linear actuation
Solution Approach 2:
The invention extracts and removes the reduction gear box and associated transmission components from the door system. By eliminating these space-consuming elements, the system achieves compact dimensions while preserving the ability to control door movement effectively
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 solution provides a compact, silent, and maintenance-free automatic balanced door with precise control over door movement, eliminating the need for complex transmission mechanisms and reducing noise levels.
Implementation Method 1
The roller carriage (3) moves inside a running profile (4) located in the horizontal section of a door frame (5) of the door and incorporates a linear motor that moves the roller carriage (3) along the running profile (4)
Implementation Method 2
pivoting arms (6) articulated at one end to the door frame (5) and to the leaf (1) at the other, which force the pivoting of the leaf (1) on the shaft (2) of the roller carriage (3) as it moves from the centre of the running profile (4) towards the inner end of the door
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Automatic door with balanced movement where the leaf (1) has pivoting arms (6) articulated at one end to the frame (5) and at the other to the leaf (1) that hangs from the shaft (2) of a roller carriage (3) in which some coils (9) are housed, fed by brushes (10) that take the current from two electrical power supply tracks (11) arranged inside the running profile (4) that has an alignment of magnets (14) facing the coils (9).