Elevator Brake Device Compact Design for Reduced Pit Depth
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Solution Overview
Problem
Conventional elevator systems require significant space for brake devices, which limits the depth of the pit and height of the shaft head, making it expensive and impractical to install elevators in buildings that need to reach the lowest floor without extensive excavation.
Innovation Solution
The elevator system features a thin, compact brake device design that allows the brake housing to be mounted horizontally and displaced, with a pusher mechanism that advances perpendicularly to the brake strip, enabling the brake device to be placed next to the car, reducing the space required beneath it and allowing for a smaller pit and shaft head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brake devices are placed beneath the car, then reliable braking is achieved, but significant space is required increasing pit depth and shaft head height
Solution Approach 1:
The brake device is repositioned from the conventional location beneath the car to the side of the car, utilizing the lateral space between the car and the guide rail. This dimensional change allows the brake mechanism to operate in a previously underutilized spatial dimension, reducing the pit depth and shaft head height requirements while maintaining braking functionality.
Solution Approach 2:
The brake device components are nested within each other to achieve a compact design. The brake housing contains the brake body, which in turn contains the pusher mechanism. This nested arrangement minimizes the overall volume of the brake device while ensuring all necessary components are integrated and functional.
2Volume of moving object
If brake device space is reduced, then pit depth and shaft head height are minimized, but brake device design becomes more complex
Solution Approach 1:
The brake device is divided into distinct functional modules: a brake housing, a brake body with brake pad, and a pusher mechanism. This segmentation allows each component to be optimized independently for its specific function while contributing to the overall compact design. The modular structure simplifies the design process despite the space constraints.
3Volume of moving object
If brake device is placed next to the car, then pit excavation is reduced, but brake device must be extremely thin
Solution Approach 1:
The brake body is designed to be movable relative to the brake housing, allowing it to dynamically adjust its position. In the standby position, the brake body is retracted to minimize the device thickness. During braking, the pusher advances to move the brake body into contact with the brake strip, providing the necessary braking force without requiring a permanently thick 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 design minimizes the space needed for the brake device, allowing for easier and cheaper installation of elevators that can reach the lowest floor without the need for extensive excavation, as the brake device can be placed adjacent to the car, reducing the pit depth and shaft head height.
Implementation Method 1
The pusher can be advanced in the direction of the brake body, substantially along a line of action extending perpendicularly to the brake strip. The pusher can be pressed against the brake strip which can be arranged between the brake body and the pusher.
Implementation Method 2
the brake body is designed to be displaced or rotated upon contact with the brake strip and thus to clamp the brake strip
Data Source
AI summary
An elevator system arrangement includes a car, a brake strip and an elevator brake device for braking the car on the brake strip, preferably on a brake strip integrated in a guide rail. The elevator brake device includes: a brake housing displaceably mounted in the elevator brake device and is held in a standby position by an applied force, a brake body movably arranged on the brake housing and designed to clamp the brake strip, a pusher arranged on the brake housing so that the brake strip can be arranged between the brake body and the pusher, wherein, when the elevator brake device installed, the distance from the car-side delimitation plane of the elevator brake device to the end face of the brake strip is less than 70% of the distance from the car-side delimitation plane of the elevator brake device to the car-remote plane.