Sensor arrangement for an agricultural baler

摘要

An agricultural baler (10) comprises a frame (11), a pick-up assembly (14) for picking up crop material from a field and a baling chamber (18) for receiving crop material from said pick-up assembly (14), the baling chamber (18) having at least one movable wall portion (30). A plunger (24) is mounted for reciprocating movement in said baling chamber for compression of the crop material therein, said plunger (24) being driven by a gearbox (27) which is affixed to said frame (11). Control means (31) adjust the position of the movable wall portion (30) in response to the signal from a load sensor (64), which is connected by a lever (40) to the plunger gearbox (27) for monitoring the reaction forces of the crop material on said plunger (24) during the compression stroke. The lever arrangement includes a longitudinal pull member (50) connected to one arm of the lever (40) and a ball bearing (62) mounted over the load sensor (64) and connected to the other arm of the lever for precluding the effects of transverse or upward vibrations of the gearbox (27) on the sensor (64). <IMAGE>