Treadmill Inspection

I. Treadmill External Structure and Basic Safety Testing

1.1 Overall Machine Stability Test

Testing Standard:

According to the basic requirements of EN957-1 safety regulation testing: The tester should have a height of 1750mm±50mm and a weight of 100KG±5KG. The equipment is tilted 10° in the direction of motion and 5° in the non-motion direction. During normal movement within 80% of the equipment's motion range, neither the equipment nor the person should tip over. (EN60335: If the equipment can be folded and stored vertically, this method should be applied to ensure that it does not suddenly tip over and harm children during the vertical storage process.)

Testing Method:

Use a 100KG tester to perform stability tests on a test platform tilted 10° in the direction of motion and 5° in the non-motion direction. Then, fold the equipment and conduct stability tests.

Testing Tools:

2m×2m adjustable tilt inspection platform, human tester weighing 125KG or more with a height of 1750MM or above.

1.2 Overall Machine External Safety Structure Test

Testing Standard:

According to the basic requirements of EN957-1 safety regulation testing:

1. All edges and sharp corners that are easily accessible to humans must have a rounded corner with R≥2.5MM. Other easily accessible edges must be polished and protected.

2. The ends of the equipment's tubes should be capped or plugged with other parts of the equipment for protection. After durability testing, the caps must remain in place without falling off. If there is a possibility of detachment during movement, the pull-out force should be ≥70N (EN957-1.6.6 determination of pull-out force for detachable grips).

3. EN957—1.5.4 Adjustment and Locking Mechanisms: During testing according to 6.1.2 and 6.1.4, the adjustment devices of the training equipment should operate safely, be secure, conspicuous, and easily accessible. Unobtrusive adjustment devices should be excluded. Adjustment components must not affect the user's range of motion. Weight adjustment pins should have fail-safe mechanisms, and the function of any locking mechanism should be clearly understandable.

4. EN957-7.5.2.2 Transmission and Rotating Parts: Drive belts, rear rollers, brackets, and the gap between the rear roller/belt and the ground should be protected. The width of the toe guard should be wider than the rear roller, and the tilt angle of the toe guard should be between 0—15°.

During testing according to EN957-7.6.1, the following situations must not occur: (Insert a test probe at the entry point to check if the test probe bends), the test probe being drawn into the gap between the rear roller and the drive belt, or into the gap between the toe guard and the running belt.

Testing Method:

Visual inspection and use of an R gauge to measure whether the chamfers on the tube ends and easily accessible parts of the equipment could potentially harm the user.

Observe whether the caps of the treadmill fall off during durability testing and when dragging the equipment. Use a pointer-type force gauge to test the maximum pull-out force of the caps (test the pull-out force of the rear foot guard of the treadmill).

Use a test probe to check whether it could be drawn into the gap between the rear roller and the running belt, or into the gap between the rear foot guard and the running belt. Fingers should not be drawn into the gap between the rear roller and the lateral reinforcement tube of the running frame. During movement, toes should not be drawn into the side strips on both sides of the treadmill.

Testing Tools:

Pointer-type force gauge, R gauge, test probe.

1.3 Safety Distance Test for Easily Accessible Parts of the Overall Machine

Testing Standard:

According to the basic requirements of EN957-1 safety regulation testing:

Easily accessible parts refer to: handgrip areas, shear points, rotating and reciprocating parts.

1. The distance between moving parts related to fingers and rigid parts should remain unchanged during movement and should be ≤8.6MM.

2. The distance between moving parts related to hands and rigid components should be ≥25MM.

3. The distance between moving parts related to feet and rigid components should be ≥60MM.

4. EN957-6.5.2.1 For equipment with adjustable elevation angles, when the distance between any part of the equipment and the ground is less than 60MM, the rate of change of the elevation angle must not exceed 1°/second. The user should be able to immediately shut down the equipment.

Testing Method:

Use a vernier caliper or test finger to conduct item-by-item testing.

1. The gap between the handrails when the treadmill is folded, and the gap between the treadmill during operation and the main frames on both sides.

2. The gap between the sole of the foot and the rear foot guard during movement.

3. The height of the lowest point of the treadmill in contact with the ground.

Testing Tools:

Vernier caliper, tape measure, test finger, stopwatch.

1.4 Handrail Device

Testing Standard:

According to EN957-6.5.8 testing requirements:

The treadmill should have side handrails and a front handrail for user support and emergency escape. One of the following structures can be selected:

1. One front handrail.

2. Two side handrails.

Or both of the above.

The front handrail should have: a minimum width (running belt width + 50MM) equal to the width of the front roller's longitudinal axis.

Height: 800mm---900mm.

The maximum width of the two side handrails is 900mm (distance from the center of one handrail to the center of the other).

The length of each side handrail should not be less than 30% of the length of the运动面 "1".

3. EN957-1.5.7 Handgrip Test

5.7.1 Integrated Handgrip

During testing according to 6.1.2 (visual inspection), integrated handgrips should be marked with installation positions (general purpose) and have a textured surface to prevent slipping.

5.7.3 Rotating Handgrip: Rotating handgrips should have mechanical locking devices and a textured surface to prevent slipping.

During testing according to 6.6 (using a rod to properly clamp the handgrip and apply torque):

Torque values:

Class H: 50N.M, Class S: 75N.M.

Testing Method:

Visual inspection and use of a tape measure to check the relationship between the front handrail, side handrails, and the width of the drive belt to ensure compliance with requirements.

Use barbell plates to test the torque of the handgrips. (Test the pull force between the handgrip and the foam grip sleeve according to the company's standards.)

Prepare a pair of test shoes for testing the coefficient of friction. Place a 10N standard weight on the test shoes and use a pointer-type force gauge to slowly drag the test shoes to test the coefficient of friction on the side strips of the treadmill.

Testing Tools:

Tape measure, test shoes, pointer-type force gauge.

II. Overall Machine Fatigue Life and Temperature Rise Testing

2.1 Fatigue Life Test

Testing Standard:

According to EN957-7.6.7 testing:

Use a car tire 155/13 (air pressure 1.5bar), 75KG (equivalent mass, including tire).

Drop height: 10MM Frequency: not less than 30 times/minute.

Procedure: At a point 66% of the length of the drive belt from the rear, adjust the treadmill to a medium incline position. Use the tire to drop and impact the longitudinal axis of the running belt:

1. Class H: 12000 times at 8KM/H.

2. Class S: 100000 times at 12KM/H.

After testing, all components of the equipment should show no abnormalities.

Test the maximum运动负载量 of the treadmill: Treadmill speed: 8KM/H, add several testers weighing over 100KG to the running board until the treadmill can no longer operate normally. Test the maximum load capacity of the treadmill.

Testing Method:

Manual fatigue test: Use a tester weighing 125KG, treadmill test speed: 8KM/H. After 12000 fatigue tests, the treadmill should have no abnormal noise.

Laboratory machine test: Under the treadmill test frame, use a car tire (equivalent weight 140KG) to freely fall from a height of 40MM—50MM at a frequency of 30 times/minute to impact the running board. After continuous fatigue testing for 100 hours, the treadmill should not be damaged, circuit components should not be burned out, main parts should have no significant abnormal noise, the circuit board should work normally, and there should be no obvious indentations on the running board.

After continuous fatigue testing for 300 hours, the running board, running belt, and drive belt should not break, the motor shaft should not be deformed, the motor should work normally, the bearings inside the front and rear rollers should not be scattered, there should be no significant abnormal noise, and the roller shafts should not be misaligned.

2.2 Temperature Rise Test

Testing Standard:

According to EN957—7.5.2.3 temperature rise testing:

During testing according to 6.2:

(Check according to 6.7:

Class H: 30 minutes

Class S: 60 minutes)

The temperature rise of the affected parts should not exceed 65℃.

Testing Method:

Laboratory testing method:

Use a car tire to freely fall from a height of 30MM—40MM at a frequency of 30 times/minute to impact the running board. Record the laboratory room temperature and the initial temperature of the main components of the treadmill before testing. After 60 minutes of testing, record the highest temperature of the tested components.

Then, record the temperature rise of the main electrical components of the treadmill every 1-2 hours. Record the changes in current and voltage when the tire impacts the running board, and document the results until the treadmill testing is completed.