Elevator Disc Brake Centering for Equal Pad Air Gaps
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Solution Overview
Problem
Disc brakes in elevators experience unequal air gaps between brake pads and the brake disc, leading to uneven wear and high-frequency noise due to rubbing.
Innovation Solution
An elevator disc brake design featuring a brake caliper with elastic means, adjustment members, and locking members to ensure equal air gaps between brake pads and the brake disc, using wire springs or metal sheets to center the brake disc and adjust the brake pads' position, thereby eliminating uneven wear and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the disc brake is opened without elastic means to center the brake disc, then the structure is simpler, but unequal air gaps between brake pads and brake disc occur causing unequal wear and high-frequency noise
Solution Approach 1:
Elastic means (wire springs or metal sheets) are introduced as intermediary components between the brake caliper and the brake disc. These elastic means act as mediators that automatically adjust and maintain equal air gaps between the brake pads and the brake disc, eliminating the need for complex adjustment mechanisms while ensuring precise air gap equality.
Solution Approach 2:
The elastic means are designed to automatically center the brake disc and maintain equal air gaps without requiring external intervention or complex adjustment mechanisms. The elastic components self-adjust based on the brake disc position, providing self-service functionality that maintains manufacturing precision while keeping the overall structure relatively simple.
2Manufacturing precision
If adjustment members and locking members are added to adjust elastic means, then air gap equality is achieved, but the device complexity increases
Solution Approach 1:
The brake system incorporates dynamic adjustment capabilities through adjustment members that allow the elastic means to be tuned during installation or maintenance. The locking members then fix the adjusted position, creating a dynamic system that can adapt to different installation conditions while maintaining equal air gaps, balancing precision requirements with structural considerations.
3Reliability
If elastic means are used to center the brake disc, then unequal wear and noise are eliminated, but the ease of manufacture decreases
Solution Approach 1:
The invention utilizes parameter changes in the elastic means (wire springs or metal sheets) to achieve reliable uniform brake pad wear. By selecting appropriate elastic parameters and dimensions, the system automatically maintains equal air gaps, ensuring reliable uniform wear while keeping the manufacturing process relatively straightforward through the use of standard elastic components.
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 achieves equal wear of brake pads and eliminates high-frequency noise by maintaining consistent air gaps, allowing for easy on-site adjustments and cost-effective maintenance.
Implementation Method 1
elastic means configured to center the brake disc between the brake pads
Implementation Method 2
brake magnet configured to operate the brake plate; brake pads being attached to the brake plate and configured to provide a braking action when moved against a brake disc due to a movement of the brake plate
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
According to an aspect, there is provided an elevator disc brake comprising a brake caliper (100, 202) comprising a brake plate (214) and a brake magnet (212) configured to operate the brake plate (120, 214); brake pads (118A, 118B, 210A, 210B) comprising a first brake pad (118A, 210A) attached to the brake plate (120, 214) and a second brake pad (118B, 210B) attached to the brake caliper (100, 202), the brake pads (118A, 118B, 210A, 210B) being configured to provide a braking action when moved against a brake disc (114, 216) due to a movement of the brake plate (120, 214); and elastic means (102, 104, 204) configured to center the brake disc (114, 216) between the brake pads (118A, 118B, 210A, 210B).