Vertical Rail Brake Hanger With Pivoting Friction Arms
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Solution Overview
Problem
Existing brake systems for objects moving on vertical tracks, such as lift gates and elevator cars, fail to provide reliable emergency braking in unforeseen disconnection scenarios, especially when contaminants like grease accumulate on guide surfaces.
Innovation Solution
The brake system features adjustable hangers with inclined surfaces connected to the object and vertical guide surfaces, allowing for smooth braking through rollers or wedges that clamp onto the guide surfaces upon disconnection, ensuring effective engagement even with contaminants present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional brake systems with fixed guide surfaces are used, then the structure is simple, but the braking reliability deteriorates when contaminants like grease accumulate on the guide surfaces
Solution Approach 1:
The brake system employs dynamic elements including a movable hanger that can shift position, pivoting arms with rotating friction elements (rollers or wedges), and spring-loaded engagement mechanisms. These dynamic components allow the brake to adapt its configuration based on operational conditions, maintaining reliable friction contact even when guide surfaces are contaminated with grease or other substances.
Solution Approach 2:
The brake system changes physical parameters during operation: the hanger moves vertically to adjust engagement position, the pivoting arms rotate to bring friction elements into contact with guide surfaces, and springs modify contact pressure. These parameter changes enable the brake to maintain effective friction engagement regardless of contaminant presence on the guide surfaces.
2Reliability
If adjustable hangers with friction elements are used, then braking effectiveness improves, but the device complexity increases
Solution Approach 1:
The hanger assembly serves multiple functions: it positions the friction elements, provides structural support, enables vertical adjustment, and facilitates engagement/disengagement of the braking mechanism. The pivoting arms with friction elements also serve dual purposes of both guiding motion and applying braking force. This multi-functionality reduces the need for separate dedicated components.
Solution Approach 2:
The brake mechanism employs nested structural arrangements where the pivoting arms are mounted on the hanger, friction elements are attached to the arms, and spring elements are integrated within the assembly. This nested configuration consolidates multiple functional components into a compact integrated unit, managing complexity through hierarchical organization.
3Ease of operation
If friction elements are arranged between inclined surfaces and vertical working surfaces, then smooth braking is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The friction elements utilize curved or rounded surfaces including inclined planes and cylindrical rollers. These curved geometries provide self-aligning characteristics that accommodate variations in manufacturing tolerances and guide surface imperfections. The rounded contact surfaces distribute loads more evenly and maintain stable friction engagement without requiring extremely precise alignment between 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 provides a simple and effective emergency braking mechanism that ensures smooth and reliable stopping of objects on vertical tracks, even in the presence of contaminants, by utilizing adjustable hangers and friction elements that securely engage with the guide surfaces upon disconnection.
Implementation Method 1
The hanger is connected to the object with a spring
Implementation Method 2
Friction elements are arranged between the inclined surfaces of the hanger and the two vertical working surfaces of the guide
Implementation Method 3
The opposite ends of the pivoting arms are journalled on the axle, which protrudes from the side wall of the object
Implementation Method 4
The pivoting arms pivot about the axle to engage the friction elements with the guide surfaces
Implementation Method 5
The friction elements of the brake are most conveniently rollers or in the form of wedges articulated to the free ends of the pivoting arms
Implementation Method 6
causes a frictional coupling of the suspension body with the guide rail of the car
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The brake has hanger (6) at every guide (2) attached at a drive branch (3) and with a side panel of an object that is adjustably interlocked with possibility of mutual shift in a perpendicular direction. The hanger has two bent surfaces (13) and hanger is connected with the object by a spring (7). The friction element (15) is taken to a tiltable arm (12) between the bent surfaces of the hanger and two perpendicular work surfaces (14) of the guides at free ends. The opposite ends are supported on the axle (11), which projects from the side panel of the object.