Stair machine fatigue life testing machine

NegotiableUpdate on 04/08

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Stair machine fatigue life testing machine is used to test the maximum yield strength and structural stability of key parts such as stair treads, tread support structures, and body frames under static loads. Simulate the dynamic load cycle of real people climbing up and down stairs for a long time, test the fatigue life of components such as stair treads, transmission systems (such as chains and gears), motors, and the durability of the entire machine during continuous operation. Meet the relevant provisions of GB 17498.1-2008 "Fitness Equipment Part 1: General Safety Requirements and Test Methods" regarding the "Load Fatigue Test" of aerobic fitness equipment.

Product Details

Stair machine fatigue life testing machineTest the maximum yield strength and structural stability of key components such as stair treads, tread support structures, and body frames under static loads. Simulate the dynamic load cycle of real people climbing up and down stairs for a long time, test the fatigue life of components such as stair treads, transmission systems (such as chains and gears), motors, and the durability of the entire machine during continuous operation. Meet the relevant provisions of GB 17498.1-2008 "Fitness Equipment Part 1: General Safety Requirements and Test Methods" regarding the "Load Fatigue Test" of aerobic fitness equipment.

楼梯机疲劳寿命试验机

1Stair machine fatigue life testing machineOverall structural design

The testing machine adopts an integrated structure of "fixed platform+simulation loading system+gait simulation mechanism+data acquisition and control unit", with an overall size of about 3000mm × 1800mm × 2200mm (length × width × height), and the specific composition is as follows:

structural module	core functionality	key component
fixed platform	Fix the tested stair machine to ensure that there is no displacement or shaking of the equipment during the testing process	High strength steel structure frame, adjustable positioning fixture (suitable for different types of stair machines), anti slip and shock-absorbing pad
Simulated loading system	Output static/dynamic loads, simulate human pressure on pedals	Servo electric cylinder (maximum load 200kg, load accuracy ± 1%), pressure sensor (range 0-200kg, accuracy 0.1% FS)
Gait simulation mechanism	Simulate the pedal contact trajectory and step frequency of real people climbing up and down stairs	Multi degree of freedom robotic arm (capable of lifting, forward and backward translation, with an action accuracy of ± 0.5mm), stepper motor (with a step frequency adjustment range of 30-120 steps/min)
Data acquisition control unit	Control device operation, collect test data, and achieve human-computer interaction	Adopting PLC program control operation, touch screen (10 inches, supporting parameter setting and data display), data acquisition card (sampling frequency 100Hz)

2、 Static load testing plan

（1） Test content

Test the maximum yield strength and structural stability of key components such as stair treads, tread support structures, and body frames under static loads.

（2） Test steps

1. Equipment fixation: Fix the tested stair machine on the fixed platform of the testing machine through positioning fixtures, adjust the levelness of the equipment, and ensure alignment with the simulated loading system.

2. Parameter setting: Set static load parameters on the touch screen, including loading point (pedal center, pedal edge), load level (50kg, 100kg, 150kg, 200kg, corresponding to the maximum load of different weight groups), and holding time (holding pressure for 10 minutes for each load level).

3. Load application: Slowly apply static load through a servo electric cylinder, and the pressure sensor provides real-time feedback on the load value to ensure that the load remains stable at the set value.

4. Data collection: Use displacement sensors (laser displacement sensors, accuracy ± 0.01mm) to collect the deformation of the loading point, synchronously record the load value and deformation data, and generate a static load deformation curve.

5. Result judgment: If there is deformation, cracking, or abnormal noise in the structure under a certain load level, it is judged as structural failure and the failure load is recorded; If there are no abnormalities in all load levels, the static strength is judged to be qualified.

3、 Dynamic Load Fatigue Life and Durability Testing Scheme

（1） Test content

Simulate the dynamic load cycle of real people climbing up and down stairs for a long time, test the fatigue life of components such as stair treads, transmission systems (such as chains and gears), motors, and the durability of the entire machine during continuous operation.

（2） Test parameter setting

test metrics	parameter range	Setting criteria
Dynamic load waveform	Sine wave/trapezoidal wave (simulating the process of human body stepping and releasing)	Fitting results of pedal force curve during real person climbing stairs
Peak load	50-150kg (adjustable, corresponding to dynamic load of conventional weight population)	The instantaneous pressure on the pedals when adults walk is about 1.2-1.5 times their body weight
number of cycles	100000 to 1 million times (divided into 5 stages, with one shutdown inspection every 200000 times)	The estimated total number of uses of the staircase machine within its normal service life (5 years)
cadence	60-90 steps per minute (regular climbing frequency)	Common stride frequency range of users in market research
Continuous running time	8 hours per day (simulating the average daily usage time of commercial premises)	Actual usage of equipment in gyms and other scenarios

（3） Test steps
1. Gait calibration: Simulate the human climbing trajectory through a multi degree of freedom robotic arm (pedal lifting height 15-25cm, forward and backward translation distance 30-40cm, adapted to different stair machine pedal spacing), adjust the robotic arm action to match the stair machine pedal movement rhythm, and ensure accurate contact position.

2. Dynamic loading: Start the servo electric cylinder and stepper motor, output dynamic loads according to the set load waveform, peak value, and step frequency, and achieve the cyclic action of "stepping release displacement" to simulate the continuous climbing process.

3. Data collection: Real time collection of the following data:

Load data: The pressure sensor records the peak and valley values of the load for each cycle, monitoring the stability of the load;

Operating data: The encoder records pedal speed, motor current, and determines the operating status of the transmission system and motor;

Fault data: If there is a load fluctuation exceeding ± 5%, abnormal increase in motor current (exceeding 1.2 times the rated current), mechanical abnormal noise, etc., the equipment will automatically record the fault time and parameters.