Multi-Motor Escalator Drive Layout for Lifting Heights Beyond 28 Meters
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Solution Overview
Problem
Existing escalator drive devices are limited to a maximum lifting height of 28 meters, and increasing motor power or number leads to space constraints and structural incompatibilities, making it difficult to achieve higher lifting heights.
Innovation Solution
A driving device for escalators incorporating multiple motors and gear boxes, with specific arrangements of motors and spindles to enhance lifting power without increasing motor size, utilizing unused space and optimizing torque distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power of the driving motor is increased to increase lifting height, then the lifting height is improved, but the size of the driving motor increases significantly, making the original space insufficient
Solution Approach 1:
The patent divides the single high-power motor into multiple lower-power motors (first driving motor, second driving motor, third driving motor, fourth driving motor, fifth driving motor, and sixth driving motor). Each motor connects to gear boxes that transmit torque to the driving spindle and handrail belt spindle. This segmentation allows the system to achieve the required total lifting power without any single motor exceeding space constraints, as each motor maintains a compact size suitable for the original accommodation space.
2Power
If the number of driving motors is increased to increase lifting height, then the lifting height is improved, but the motor accommodation space cannot meet the requirements
Solution Approach 1:
The patent utilizes the spatial dimension between the driving spindle and handraw belt spindle by positioning the fifth driving motor and sixth driving motor in this interstitial space. Specifically, the fifth driving motor is arranged between the driving spindle and handraw belt spindle, and the handraw belt spindle is arranged between the fifth driving motor and sixth driving motor. This three-dimensional spatial arrangement allows multiple motors to be accommodated within the original motor accommodation space without requiring additional space, effectively using unused volume to house the segmented motor system.
3Length of stationary object
If the lifting height is increased beyond 28 meters, then the market demand is met, but the original structure of the driving spindle becomes incompatible
Solution Approach 1:
The patent implements segmentation in both the motor system and gear transmission system. Multiple gear boxes (first gear box, second gear box, and third gear box) are introduced to distribute and transmit torque from the segmented motors to the driving spindle and handraw belt spindle. This segmented gear transmission structure enables the driving spindle to adapt to increased lifting heights by providing multiple torque transmission paths, making the original spindle structure compatible with the new multi-motor configuration and higher lifting requirements.
Solution Approach 2:
The gear boxes serve multiple functions: they transmit torque from different motors to the driving spindle and handraw belt spindle, accommodate the segmented motor arrangement, and enable the system to achieve both the original lifting capacity and the enhanced lifting height. This multi-functionality makes the driving spindle structure adaptable to the increased lifting height requirement while maintaining compatibility with the existing mechanical framework.
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 allows for increased lifting height beyond 28 meters without requiring additional space, by effectively distributing torque through multiple motors and gear boxes, thus enhancing the escalator's lifting capacity.
Implementation Method 1
the first driving motor and the second driving motor are connected with a first gear box, and the third driving motor and the fourth driving motor are connected with a second gear box, the driving torque of the first driving motor and the second driving motor is transmitted to the driving spindle through the first gear box, and the driving torque of the third driving motor and the fourth driving motor are transmitted to the driving spindle through the second gear box
Implementation Method 2
a spline structure is arranged on the outer circumferential surface of a part handraw belt spindle. The handraw belt spindle gear is provided with a handraw gear through hole, and a spline structure is arranged on the inner circumferential surface of the handraw gear through hole
Data Source
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AI summary
A driving device of an escalator, which comprises first, second, third and fourth driving motors, a driving spindle and a handrail belt spindle, wherein the first and second driving motors are connected with a first gear box and drive the driving spindle; the third and fourth driving motors are connected with a second gear box and drive the driving spindle. The driving device further comprises a fifth driving motor and a sixth driving motor. The fifth and sixth driving motors are connected with a third gear box and drive the driving spindle and the handrail belt spindle through the third gear box; the fifth driving motor is arranged between the driving spindle and the handrail belt spindle; the handrail belt spindle is arrange between the fifth and sixth driving motor; the third gearbox is disposed between the first and second gearboxes and is disposed closer to the first gearbox than the second gearbox.