B - Operations – Transporting – 06 – B
Patent
B - Operations, Transporting
06
B
74/19
B06B 1/10 (2006.01) B06B 1/16 (2006.01) E01C 19/28 (2006.01) G02B 6/44 (2006.01)
Patent
CA 1183024
ABSTRACT The invention relates to a hydraulic device for adjusting the vibration amplitude of eccentric elements especially designed for use on soil and asphalt compaction machines. According to the invention the device consists of a piston 18 enclosed within a hydraulic cylinder 19 the connecting rod 14 of which is rotatably journalled in piston 18 and both ends of which protrude through the ends of cylinder 19. One end of connecting rod 14 is rigidly connected to the eccentric element's drive shaft 11, which is capable of moving in an axial direction and the other end of connecting rod 14 is nonrotatably connected to a splined sleeve 15 fitted with a drive motor. The splined coupling permits axial movement between sleeve 15 and connecting rod 14 even while the sleeve is rotating. According to the invention the hydraulic cylinder is of single-acting type and in order to apply a return force on the eccentrics a spring 27 is arranged between one of the sliding bearing bushes 12 inside cylinder 2 and a stop plate 28 rigidly mounted on shaft 11.
414240
Dynapac Maskin Aktiebolag
Ridout & Maybee Llp
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