Device and assembly for locking the bowl liner of a rock crusher

An assembly for locking the bowl liner of a rock crusher, the assembly comprising:

• a bowl liner, the bowl liner comprising a circumferential top lip and a generally V-shaped circumferential recess disposed below the top lip;
• an outer crusher surface;
• a wedge disposed between the bowl liner and the outer crusher surface, the wedge comprising a forward portion having a V-shaped forward nose, a rearward portion, a wedge cavity disposed between the forward and rearward wedge portions, and an aperture defined within the rearward portion of the wedge, the aperture extending through the rearward portion of the wedge to the wedge cavity;
• a bolt having a head and an externally-threaded portion that extends forwardly of the bolt head;
• a nut having an internally-threaded portion, the threaded portion of the nut being complementary to the threaded portion of the bolt;
• and
• a cylinder, the cylinder disposed within the wedge cavity;
• wherein the V-shaped forward nose of the wedge is receivable within the V-shaped circumferential recess disposed below the top lip of the bowl liner;
• and
• wherein the wedge is alternatively moveable inwardly and outwardly so as to engage and disengage the bowl liner of the crusher when the cylinder is pressurized and depressurized, respectively.

A method for locking the bowl liner of a rock crusher, the bowl liner comprising a circumferential top lip and a generally V-shaped circumferential recess disposed below the top lip, and the rock crusher further comprising an outer crusher surface, the method comprising the steps of:

• providing a wedge, the wedge comprising a forward portion having a V-shaped forward nose, a rearward portion, a wedge cavity disposed between the forward and rearward wedge portions, and an aperture defined within the rearward portion of the wedge, the aperture extending through the rearward portion of the wedge to the wedge cavity;
• providing a bolt having a head and an externally-threaded portion that extends forwardly of the bolt head;
• providing a nut having an internally-threaded portion, the threaded portion of the nut being complementary to the threaded portion of the bolt;
• attaching the nut to the threaded portion of the bolt such that the threaded portion of the bolt extends into a portion of the wedge cavity aperture;
• positioning the wedge between the bowl liner and the outer crusher surface;
• providing a cylinder;
• removably placing the cylinder into the wedge cavity;
• pressurizing the cylinder to urge the forward nose of the wedge into contact with bowl liner recess and to urge the head of the bolt into contact with the outer crusher surface;
• rotating the nut about the threaded portion of the bolt thereby placing the wedge in a holding position;
• depressurizing the cylinder;
• and
• removing the cylinder from the wedge cavity.

A method for locking the bowl liner of a crusher comprising the steps of:

• providing a wedge having a cavity and a rearward-facing aperture;
• providing a bolt having a head;
• providing a nut that is complementary to the bolt;
• providing a cylinder;
• placing the cylinder into the wedge cavity;
• placing the bolt and nut behind the wedge and into the wedge aperture;
• pressurizing the cylinder;
• and
• rotating the nut about the bolt to place the wedge in a holding position.