Lateral dynamic test according to DIN EN ISO 11243 section 5.9.4
The lateral dynamic test in accordance with section 5.9.4 ensures that bicycle racks can withstand the lateral loads that occur during operation. These loads are caused, for example, by cornering, side impact with obstacles or uneven loading.
The test stand for lateral dynamic testing from Hegewald & Peschke is designed exactly according to standard specifications and consists of a test device that fixes the racks in a fixed position. A mechanical device causes the rack to vibrate from one side to the other. The movement is carried out around a horizontal longitudinal axis. The swing angle can be adjusted between ±5 ° (standard specification for the rear carrier) and ±7.5 ° (standard specification for the front carrier). The oscillation frequency is preset to 1 Hz as required by the standard, which means that the rack performs a complete oscillation (left-right) once per second. The frequency can be changed by ± 50%. A number of cycles of 100,000 is provided for the lateral test procedure. Once this number has been reached, the test stand switches off automatically. The test stand is operated easily and conveniently via a PLC with touch panel directly on the device.
Vertical dynamic test according to DIN EN ISO 11243 section 5.9.3
The aim of this test is to test the stability and durability of bicycle racks under vertical loads that occur in daily use, e.g. due to unevenness of the road surface or due to loading with luggage or child seats.
Hegewald & Peschke has also developed a special test device for this test procedure. The luggage carrier is firmly connected to a test platform on the test stand. A defined test load consisting of a fixed weight is applied via the luggage carrier. The load is transferred to the carrier by a sinusoidal, vertical oscillating movement. This simulates the impact-like load that occurs when driving over bumps, kerbs or potholes. The oscillating movement takes place with a defined stroke and a variable frequency that is adapted to the respective type of luggage carrier and its use. The total stroke can be adjusted in various stages in accordance with the standard. The frequency can be varied in the range from 1 Hz to 8 Hz. At 1 Hz, a slow, continuous load is applied. Higher frequencies of up to 8 Hz simulate fast, sudden loads, which correspond to typical load peaks when driving quickly over uneven surfaces or kerbs.
A complete test usually takes approx. 4 hours. During this time, the luggage carrier is continuously loaded with the defined oscillating movement. The standard requires that the luggage carrier must pass the test without breaking, cracking or permanent deformation.
The lateral and vertical dynamic testing of luggage carriers ensures that they can withstand the forces that occur in real use and that user safety is guaranteed. For manufacturers, they offer a reliable method of testing the durability of their products and thus make a decisive contribution to product quality and safety.
The test stands from Hegewald & Peschke guarantee reliable and standard-compliant testing. In addition to dynamic tests with specific test systems, static and cyclic alternating load test procedures can also be carried out with the universal testing machines in the inspekt series.
