| 摘要 |
A jaw crusher ( 10 ) includes a fixed jaw ( 16 ) and a swing jaw ( 18 ), which define a crushing chamber ( 26 ). The swing jaw ( 18 ) is mounted for cyclic movement in the direction of the fixed jaw ( 16 ), for crushing material between the two jaws. A cross beam ( 42 ) is adjustably received in apertures ( 40 ) provided in the walls ( 12, 14 ) of the frame ( 11 ). A toggle plate ( 54 ) is operatively arranged between the rear of the swing jaw ( 18 ) and the front of the cross beam ( 42 ). An hydraulic cylinder arrangement ( 60 ) includes a pair of cylinders mounted one on either side of the frame ( 11 ) in a respective aperture ( 40 ), in operative engagement with the rear of the cross beam ( 42 ). In use, the cylinders are pressurised to a predetermined value to provide an adjustable, pre-loaded reaction against the toggle plate ( 54 ), in line with the side walls.
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