Test rig for child bicycle seats according to DIN EN 14344

Field of application:

Testing of child seats for cycles according to DIN EN 14344

• Vertical test according to DIN EN 14344 paragraph 8.9.3.5.2
• Side test according to DIN EN 14344 paragraph 8.9.3.5.3
• Transverse stiffness test according to DIN EN 14344 paragraph 8.9.3.6

Side test 

• Oscillation of the seat from side to side with a sinusoidal movement over horizontal axis
• Mounting of the test specimen on a solid luggage carrier replica
  • Laterally tiltable
  • Height adjustable
  • Alternative mounting options on request
• Movement of the support via a linkage with a connecting rod from a gear motor with eccentric disk
• Swivel angle ±10
• Convenient operation via PLC control 
• Duration of the standard-compliant test: approx. 14 hours (50,000 cycles at a frequency of 1 Hz according to DIN EN 14344)

In accordance with the specification in the standard, the stroke in the resonance case can be increased by 23% . In this case, the speed is reduced from 1/s to 0.9/s.

Transverse stiffness test 

• Test conditions similar to those for lateral testing
• Monitoring of the allowed deflection of the test specimen on both sides by light barriers 
• Manual adjustment of the light barriers before the start of the test
• Triggering of the light barriers is only indicated (no switch-off)
• Duration of the standard-compliant test: approx. 2 min (100 cycles according to DIN EN 14344)

Vertical test 

• Oscillation of the seat in sinusoidal motion in vertical direction
• Drive by vertically guided slider
  • Direct movement from a geared motor by eccentric
  • Stroke: ±5 mm
• Convenient operation via PLC control (Fig. 4)
• Duration of the standard-compliant test: approx. 2 hours (50,000 cycles according to DIN EN 14344)

Models:

• Double test stand for vertical, lateral and transverse stiffness testing
• Single test stand for vertical testing
• Single test stand for lateral and transverse stiffness testing

Technical data:

• Dimensions W1850 x D1250 x H2100 [mm].
• Electrical connection: 3NPE 400 VAC, 2,5 kVA, 50 Hz, back-up fuse 16A

Operation of the test stand via touchscreen with PLC control system

• Input of nominal number of cycles and possibly additional test parameters (e.g. swivel angle)
• Display of set speed and actual number of cycles
• Automatic stop after reaching the target number of cycles
• Both test units of the double test stand can be operated simultaneously and independently of each other.