A method is described for adjusting the tightness of a wear part fastened to a fixed jaw and/or a moving jaw of a jaw crusher with a tightening device that has a screw fastened at its first end in connection with a wear part located on a first side of the jaw; and a tightening member fastened to a second end of the screw on a second side of the jaw; and a spring arranged between the jaw and the tightening member. The spring is compressed or decompressed with the tightening member; the spring is influenced by at least two moving screws supported by a frame of the tightening member. The length of the spring is changed by rotating the at least two moving screws.

A method is described for adjusting the tightness of a wear part fastened to a fixed jaw and/or a moving jaw of a jaw crusher with a tightening device that has a screw fastened at its first end in connection with a wear part located on a first side of the jaw; and a tightening member fastened to a second end of the screw on a second side of the jaw; and a spring arranged between the jaw and the tightening member. The spring is compressed or decompressed with the tightening member; the spring is influenced by at least two moving screws supported by a frame of the tightening member. The length of the spring is changed by rotating the at least two moving screws.

A cylinder acceleration mechanism includes a buffer tank that supplies and discharges oil to and from a bottom-side line that is connected to a bottom-side chamber of an actuating cylinder, and an inversion lever having an intermediate fulcrum as a rotation axis. The buffer tank includes a buffer chamber with a variable capacity achieved by a seal lid moving back and forth inside of a case, and extends and reduces a length of a coupling rod provided to the seal lid and projects from the case. A bottom-side branching line branched from the bottom-side line is connected to the buffer chamber. The actuating rod of the actuating cylinder and the coupling rod of the buffer tank are coupled to respective ends of the inversion lever. The actuating rod and the coupling rod extend and retract alternately with respect to each other as the inversion lever turns.

A cylinder acceleration mechanism includes a buffer tank that supplies and discharges oil to and from a bottom-side line that is connected to a bottom-side chamber of an actuating cylinder, and an inversion lever having an intermediate fulcrum as a rotation axis. The buffer tank includes a buffer chamber with a variable capacity achieved by a seal lid moving back and forth inside of a case, and extends and reduces a length of a coupling rod provided to the seal lid and projects from the case. A bottom-side branching line branched from the bottom-side line is connected to the buffer chamber. The actuating rod of the actuating cylinder and the coupling rod of the buffer tank are coupled to respective ends of the inversion lever. The actuating rod and the coupling rod extend and retract alternately with respect to each other as the inversion lever turns.

The invention relates to a crusher for mineral materials or recycled materials, in particular rotary impact crushers or jaw crushers, having a crusher unit (10), which has a movable first crusher body (11), in particular a rotor or a crusher jaw, wherein a second crusher body (14), in particular an impact rocker or a crusher jaw, is assigned to the first crusher body (11), wherein a crushing gap (15) is formed between the crusher bodies (11, 14), wherein a movable assembly of an overload triggering device (30) is coupled to the first or to the second crusher body (11, 14), wherein the movable assembly has a cylinder (25) of a hydraulic cylinder (20) or a piston (23) guided in the cylinder (20), wherein the movable assembly is designed to permit a motion of the coupled crusher body (11, 14) increasing the width of the crushing gap (15) in an evasive motion, wherein a pressure chamber (24) is formed in the hydraulic cylinder (20), which pressure chamber is delimited by a piston (23), and wherein the overload triggering device (30) has a valve (23.8), which, in its open position, establishes a fluid-conveying connection between the pressure chamber (24) and a compensation area (28) and, in the closed valve position, blocks this connection. In order to achieve an efficient protection of the crusher unit 10 against overload situations in such a crusher, provision is made for the valve (28.8) to be formed between two components of the movable assembly that are movable relative to each other.

A crusher may include a crushing member that is driven in an operatively connected manner by way of an eccentric element such that material to be crushed can be comminuted by way of a crushing movement generated at least in part by the eccentric element. At least one eccentric bushing may be connected by way of an active surface to the eccentric element by way of frictional engagement. The eccentric bushing may have a pressure medium chamber that uses pressure to vary the frictional engagement between the eccentric element and the eccentric bushing. In some examples, the crusher may be of a jaw type or a cone type.

A housing assembly for a rock crusher having an eccentric shaft. The housing assembly has an interior side and an exterior side and comprises a first housing portion having an inner side, an outer side, and a plurality of grooves and being removably attached to the rock crusher, and a second housing portion having a plurality of grooves and being removably attached to the first housing portion. The housing assembly also comprises an inner ring having at least one inner ring housing groove and at least one inner ring pitman groove and being disposed on the interior side of the housing assembly, and an outer ring having at least one outer ring groove and being disposed on the exterior side of the housing assembly. The housing assembly is disposed around the eccentric shaft. A method for removably housing a bearing assembly on a rock crusher.

A housing assembly for a rock crusher having an eccentric shaft. The housing assembly has an interior side and an exterior side and comprises a first housing portion having an inner side, an outer side, and a plurality of grooves and being removably attached to the rock crusher, and a second housing portion having a plurality of grooves and being removably attached to the first housing portion. The housing assembly also comprises an inner ring having at least one inner ring housing groove and at least one inner ring pitman groove and being disposed on the interior side of the housing assembly, and an outer ring having at least one outer ring groove and being disposed on the exterior side of the housing assembly. The housing assembly is disposed around the eccentric shaft. A method for removably housing a bearing assembly on a rock crusher.

A jaw crusher having a movable jaw support frame configured to facilitate interchange between shim and wedge settings. The support frame is configured specifically to minimize stress concentrations and to provide the time efficient interchange between wedge and shim settings without a need to weld, cut and machine regions of the support frame.

A method and a system for supporting a frame of a mineral material crusher on a body of a crushing plant and a mineral material processing plant. The crusher frame is supported by first support devices in place in relation to the body of the crushing plant at first support points and by at least two second support devices at second support points. The second support device has an adjusting member between the crusher frame and the body of the crushing plant, and at least one second support device is configured to move the frame of the crusher vertically in relation to the body of the crushing plant. The adjusting member has a cylinder and a piston inside the cylinder which define an adjusting volume therebetween. A pressure is formed from a load above the adjusting member and is arranged to form into the adjusting volumes of the adjusting members.