EN 14766:2005 - 64_e_stf - Baltik vairas

EN 14766:2005 (E)Apply cycles of dynamic, vertically-downward forces of 0 to +1 200 N at a point 70 mm behind the intersection ofthe axes of the solid steel bar and the extension piece, E, as shown in Figure 32 for 50 000 test cycles with a testfrequency not exceeding 25 Hz.Dimension in millimetresKey1 Free-running roller2 Steel bar3 Locked suspension unit or solid link for pivoted chain-stays4 Rigid, pivoted mounting for rear axle attachment point4.9 Front fork4.9.1 GeneralFigure 32 — Frame – fatigue test with a vertical force4.9.1, 4.9.2, 4.9.4, 4.9.5, and 4.9.6 apply to all types of fork.In the strength tests, 4.9.4, 4.9.5, 4.9.6 and 4.9.7, a suspension-fork shall be tested in its free, uncompressedlengthcondition.4.9.2 Means of location of the axle and wheel retentionThe slots or other means of location for the wheel-axle within the front fork shall be such that when the axle orcones are firmly abutting the top face of the slots, the front wheel remains central within the fork.The front fork and wheel shall also fulfil the requirements of 4.10.4 and 4.10.5.4.9.3 Suspension-forks – special requirements4.9.3.1 Fail-safe requirementThe design shall be such that if the springs or dampers fail, the tyre shall not contact the crown of the fork nor shallthe components of the fork separate.53