Portable Elevator Test Lever with Bearing Pivot
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Solution Overview
Problem
Existing testing devices for elevator installations are cumbersome and require complex setups, making it difficult to quickly and securely assess the traction and acceleration capacity of elevator ropes.
Innovation Solution
A portable test lever with a load arm and force arm, featuring a variably fixable support and pivot point, allows for easy and secure attachment to elevator systems using a vice-like device and fastening elements, enabling manual operation without tools, and includes a tension transmission element for variable distance adjustment and force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing testing devices are used, then measurement functionality is provided, but setup complexity increases and operation becomes cumbersome
Solution Approach 1:
The testing device is divided into modular components: a test lever with load arm and force arm, a separately attachable support with vice-like device, and detachable fastening elements. This segmentation allows each component to be independently handled and assembled, simplifying the overall setup process while maintaining measurement functionality.
Solution Approach 2:
The support is designed with variable fixability, allowing it to be attached at different positions and configurations depending on the testing environment. The vice-like device enables dynamic adjustment of the support's attachment point, providing adaptability to different environmental conditions without requiring complex fixed installations.
2Ease of operation
If manual fastening elements are used, then tool-free operation is achieved, but fastening force may be insufficient
Solution Approach 1:
A lever is introduced as an intermediary mechanical advantage device between the operator's hand and the fastening element. By applying force to the lever, the operator can generate sufficient clamping force through mechanical leverage without requiring tools, thus achieving both tool-free operation and adequate fastening force.
Solution Approach 2:
The fastening system utilizes a wheel or similar mechanism that increases the effective circumference of the fastener head, allowing manual rotation to generate high fastening force through mechanical advantage. This changes the operational parameter from direct threading to rotational leverage, enabling tool-free yet sufficiently strong fastening.
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
Facilitates quick and secure testing of elevator ropes' traction and acceleration capacity, accommodating different environmental conditions and simplifying the setup process, while allowing for precise measurement and data recording of rope movement and acceleration.
Implementation Method 1
a bearing (29) for reducing a friction between the load arm (3) and the force arm (2) is arranged in the support (7), in particular in the pivot point (18)
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A portable test-lever (45) has a load-arm and a force-arm (49) and a variably fixable support (46). An angle-point is arranged between the load-arm and the force-arm (49). The test-lever (45) is supported via the support (46) when a force (53) is applied to the lever and to at least one tested elevator cable for verifying an operating capability and/or a cable movement of at least one elevator cable (51). The variable support (46) can be fixed with variable spacing from the fixed-point (52) on the elevator. An independent claim is included for a method for installing a portable test-lever and for establishing the operating capability.