Foldable Standing Platform Dual-Spring Damping
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Solution Overview
Problem
Existing foldable standing platforms for industrial trucks face challenges in effectively damping jolts while simultaneously ensuring that sensors can detect relatively slight weights, which is crucial for safe operation.
Innovation Solution
A foldable platform design featuring a lever arm that interacts with a dual-spring arrangement, where a soft first spring section deforms under light loads (10-15 kg) to activate a sensor, and a stiffer second spring section takes over for heavier loads, providing enhanced damping and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single spring arrangement with stiff characteristic is used for damping, then effective damping of jolts is achieved, but sensor activation under light loads becomes unreliable
Solution Approach 1:
The spring arrangement is divided into two separate spring sections (first spring section with soft characteristic and second spring section with stiff characteristic) that operate in sequence. The first spring section activates under light loads to trigger the sensor, while the second spring section provides strong damping for heavy loads. This segmentation allows each spring section to be optimized for its specific function, resolving the contradiction between light load sensitivity and heavy load damping.
2Measurement precision
If a soft spring characteristic is used for sensor activation, then light load detection is reliable, but damping of heavy loads becomes insufficient
Solution Approach 1:
The spring arrangement is divided into two separate spring sections (first spring section with soft characteristic and second spring section with stiff characteristic) that operate in sequence. The first spring section activates under light loads to trigger the sensor, while the second spring section provides strong damping for heavy loads. This segmentation allows each spring section to be optimized for its specific function, resolving the contradiction between light load sensitivity and heavy load damping.
3Device complexity
If a single spring element is used, then device complexity is low, but the system cannot distinguish between light and heavy loads
Solution Approach 1:
The spring arrangement is divided into two separate spring sections (first spring section with soft characteristic and second spring section with stiff characteristic) that operate in sequence. The first spring section activates under light loads to trigger the sensor, while the second spring section provides strong damping for heavy loads. This segmentation allows each spring section to be optimized for its specific function, resolving the contradiction between light load sensitivity and heavy load damping.
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 allows for effective damping of jolts and reliable sensor activation under varying loads, ensuring safe operation by distinguishing between light and heavy weights, thereby enhancing the overall user experience and safety.
Implementation Method 1
The first spring section (32) has a relatively soft characteristic which causes it to experience a greater change in length than the second spring section (36) under the same load
Implementation Method 2
a stiffer second spring section takes over for heavier loads, providing enhanced damping and comfort
Implementation Method 3
The first spring section (32) is arranged between a seat (30) for the first spring section and a spacer (34) that in turn acts on the second spring section (36) when the first spring section is initially deformed in the event of a load upon the platform
Data Source
AI summary
A standing platform for an industrial truck includes a spring arrangement abutting the platform when subject to a weight. A first spring section with a soft characteristic is initially deformed under load, and after a predetermined spring path of the first spring section, a second spring section with a harder spring characteristic is deformable. A sensor detects deformation of the first spring section for generating a release signal. The platform can be folded on a horizontal shaft including a lever arm arranged on a side of the shaft opposite the platform, and abuts the spring arrangement from below which is supported on the truck frame. The first spring section is arranged between a seat for the first spring section and a spacer supported on the second spring section. The spacer acts on the second spring section when the first spring section is initially deformed under a load upon the platform.