| 摘要 |
A crusher (1) for crushing stones, concrete and the like materials and comprising a frame (3) and an upper and a lower jaw (5, 4) obliquely arranged relative to vertical in said frame, said jaws defining therebetween a crushing chamber (6) with an inlet opening (7) and a discharge opening (8). At least one (5) of the jaws is movably arranged relative to the frame (3) so as to be moved towards and away from the other jaw (4) for crushing material in the crushing chamber (6). The lower jaw (4) is supported relative to a support by means of a resilient means in order to keep a contact surface (31, 32) on said jaw (4) spaced from a contact surface (33, 34) on the support at light loads of the jaw and in order to allow contact between the contact surfaces (31, 32 and 33, 34) at heavy loads of the jaw (4) during the crushing of the material. The lower jaw (4) is furthermore connected to a vibrator for subjecting said jaw to a vibrating movement. As a result, material crushed on the lower jaw is continuously thrown forwards on said jaw due to the vibration of the vibrator and is consequently carried through the crusher when no crushing of material is carried out. When material is being crushed, the contact surface (31, 32) of the jaw (4) is pressed into contact with the contact surface (33, 34) of the frame (3) with the result that the crushing is carried out like in known crushers. |
