Elevator Machine Brake Integrated Bearing Stand
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Solution Overview
Problem
Existing elevator machine brakes are complex and costly due to the need for multiple components, including a separate fixed brake plate, which increases manufacturing expenses and complexity.
Innovation Solution
A monolithic bearing stand with an integrated braking surface that eliminates the need for a separate brake plate, where a brake rotor on the machine shaft contacts the braking surface on the bearing stand to resist rotation, and a split armature with bias members and an electromagnet for controlled braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate fixed brake plate is used in the brake assembly, then the braking function is reliable, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the fixed brake plate function directly into the bearing stand by providing a braking surface on the bearing stand itself, eliminating the need for a separate fixed brake plate component. This merging of functions reduces device complexity while maintaining the braking capability through the integrated bearing stand structure.
2Reliability
If multiple separate components are used in the brake assembly, then the braking performance is effective, but the manufacturing expense increases
Solution Approach 1:
The invention combines the bearing stand and fixed brake plate into a single integrated component where the bearing stand itself provides the braking surface. This reduces the number of parts that need to be manufactured, assembled, and inventoried, thereby lowering manufacturing expenses while maintaining effective braking performance through the integrated structure.
3Reliability
If a separate fixed brake plate is incorporated into the brake assembly, then the braking capability is sufficient, but the footprint and component count increase
Solution Approach 1:
The patent eliminates the separate fixed brake plate by integrating its braking function into the bearing stand through a provided braking surface. This merging reduces the component count and simplifies the overall brake assembly structure while maintaining sufficient braking capability through the integrated bearing stand design.
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 solution simplifies the brake system by integrating the braking surface into a single bearing stand, reducing component count, footprint, and manufacturing costs while maintaining effective braking performance.
Implementation Method 1
a brake having at least one brake armature selectively moves a brake rotor coupled for rotation with the shaft between a braking position and a released position
Implementation Method 2
The brake rotor selectively contacts a braking surface formed directly on a housing to resist rotation of the machine shaft in the braking position
Data Source
Figure 1
Figure 2~3
AI summary
An elevator machine (10) includes a machine shaft (14, 14') and a sheave (26) that rotates with the machine shaft (14, 14'). A motor (12) selectively rotates the machine shaft (14, 14'). A brake (30) having at least one brake armature (36) selectively moves a brake rotor (28) coupled for rotation with the shaft (14, 14') between a braking position and a released position. The brake rotor (28) selectively contacts a braking surface (44) formed directly on a housing (20, 22, 84, 90) to resist rotation of the machine shaft (14, 14').