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BR-112024026820-B1 - Jaw Crusher and Jaw Crusher Service Tool

BR112024026820B1BR 112024026820 B1BR112024026820 B1BR 112024026820B1BR-112024026820-B1

Abstract

JAW CRUSHER SERVICE TOOL. A jaw crusher service tool (10) for supporting an item (15) during service of a jaw crusher (20) comprising a fixed jaw (30) and a movable jaw (40) mounted on a crusher frame (50) and defining a crushing chamber (60) for material to be crushed, the service tool (10) comprising a support frame (70) for supporting the item (15) and a jaw crusher mounting (80) fixed to the support frame (70) for mounting the service tool (10) on a jaw crusher (20) in which the support frame (70) is movable around the first and/or second articulation axes (90, 100) between a transport position and an item support position on the jaw crusher (20).

Inventors

  • STUART GRAYDON
  • Stuart SMYTH
  • Adam Baxter

Assignees

  • SANDVIK LTD

Dates

Publication Date
20260317
Application Date
20230621
Priority Date
20220621

Claims (17)

  1. 1. Jaw crusher service tool (10) for supporting a toggle plate during service of a jaw crusher (20), characterized in that it comprises a fixed jaw (30) and a movable jaw (40) mounted on a crusher frame (50) and defining a crushing chamber (60) for material to be crushed, the service tool (10) comprising: a support frame (70) for supporting the toggle plate, and a jaw crusher mounting (80) rotatably fixed to the support frame (70) for mounting the service tool (10) on a jaw crusher (20); wherein the support frame (70) is movable around the first and/or second articulation axes (90, 100) between a transport position and an item support position (15) on the jaw crusher (20).
  2. 2. Jaw crusher service tool, according to claim 1, characterized in that the service tool (10) is configured to be rotated to project laterally into the crusher structure (50) to reach below the fixed jaw and the movable jaw to provide support for a toggle plate below the movable jaw for installation.
  3. 3. Jaw crusher service tool, according to claim 1 or 2, characterized in that the service tool (10) is configured to project laterally from the crusher structure in the support position to receive and support toggle plates during maintenance.
  4. 4. Jaw crusher service tool (10), according to any one of claims 1 to 3, characterized in that the support structure (70) comprises a tool storage chamber (143) for storing items in a transport and storage position.
  5. 5. Jaw crusher service tool (10), according to any one of claims 1 to 4, characterized in that the first articulation axis (90) comprises a horizontal pivot axis (110).
  6. 6. Jaw crusher service tool (10), according to any one of claims 1 to 5, characterized in that the second articulation axis (100) comprises a vertical pivot axis (120).
  7. 7. Jaw crusher service tool (10), according to claim 6, characterized in that the assembly (80) defines the horizontal pivot axis (110) and the vertical pivot axis (120).
  8. 8. Jaw crusher service tool (10), according to any one of claims 1 to 7, characterized in that the support structure (70) comprises a platform (140).
  9. 9. Jaw crusher service tool (10), according to any one of claims 1 to 8, characterized in that the support structure (70) comprises an item gripper (150, 151) for holding an item (15).
  10. 10. Jaw crusher service tool (10), according to any one of claims 1 to 9, characterized in that the jaw crusher assembly (80) is a detachable jaw crusher assembly (160).
  11. 11. Jaw crusher service tool (10), according to any one of claims 1 to 10, characterized in that the jaw crusher assembly (80) is configured to be mountable on a crusher chassis (170) or on a crusher structure (50).
  12. 12. Jaw crusher (20), characterized in that it comprises a jaw crusher service tool (10), as defined in any one of claims 1 to 11.
  13. 13. Jaw crusher (20), according to claim 12, characterized in that the jaw crusher (20) comprises a motor that provides a primary power source for a primary hydraulic pump of the jaw crusher (20); a crusher frame (50) supporting a fixed jaw (30) and a movable jaw (40) that defines a crushing chamber (60); a crossbeam mounted transversely in the crusher frame (50); a toggle plate extending between the crossbeam and the movable jaw (40); a hydraulic system having a primary pump line (221) fed by the primary hydraulic pump to move the movable jaw (40) and secure the toggle plate, and a secondary primary pump line (222) fed by the primary hydraulic pump to move the movable jaw (40) and release the toggle plate; wherein the hydraulic system comprises an auxiliary pump (230) fed independently of the primary pump to effect the movement of the movable jaw (40).
  14. 14. Jaw crusher (20), according to claim 13, characterized in that the auxiliary pump (230) comprises a battery-powered auxiliary pump (240).
  15. 15. Jaw crusher (20), according to claim 14, characterized in that the battery-powered auxiliary pump (240) is a 24 V maintenance pump.
  16. 16. Jaw crusher (20), according to any one of claims 13 to 15, characterized in that the auxiliary pump (230) is in an accumulator block (210) in the crusher structure (50).
  17. 17. Jaw crusher (20), according to claim 16, characterized in that the accumulator block (210) comprises a shut-off valve (390) for isolating the hydraulic system from the auxiliary pump (230) as required.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a jaw crusher service tool for supporting an item such as a toggle plate during jaw crusher service. The invention also relates to a hydraulic system configured to operate a jaw crusher independently of a primary power source. BACKGROUND OF THE INVENTION [0002] A variety of different crushers have evolved to process bulk material, such as stone, minerals, and household and industrial waste, including construction materials, to generate a crushed product for further processing or disposal. [0003] Jaw crushers are generally composed of a fixed jaw and a moving jaw mounted in a crusher frame where the moving jaw is movable relative to the fixed jaw to generate a propulsive force to crush the material in a crushing chamber defined between the two jaws. The jaw crusher includes a crossbeam in the crusher frame and a toggle plate fixed between the crossbeam and the moving jaw. A hydraulic system applies a load to the crossbeam, which is transmitted to the moving jaw via the toggle plate to resist the forces generated during crushing. Jaw crushers can be mobile or stationary crushers, where mobile crushers are provided with a wheeled or tracked chassis and stationary crushers are provided with a stationary crusher main frame. [0004] Jaw crushers require regular maintenance and servicing, and due to the forces to which the jaw crusher is subjected during use, jaw crusher components sometimes require assembly, disassembly, replacement, or removal for service, for example, worn (typically after 3,000 to 4,000 hours of use) or damaged toggle plates may require removal and replacement. Due to the configuration of jaw crushers, these items usually have to be manually removed and replaced from below. However, toggle plates and other jaw crusher components can be extremely heavy and cumbersome (for example, toggle plates typically weigh around 100 kg), with the result that manual handling of the items can present significant health and safety risks to service personnel. [0005] Known jaw crushers are also equipped with hydraulic systems, driven by the jaw crusher motor, to effect the movement of the moving jaw and to attach a toggle plate between the moving jaw and the crossbeam. Consequently, to make the toggle plate available for removal, the jaw crusher motor is activated to lock the moving jaw and is then switched off to allow manual access to the toggle plate. Once the motor is switched off, the hydraulic fluid is returned through the hydraulic system by gravity, resulting in the closing of the moving jaw. SUMMARY OF THE INVENTION [0006] One object of the invention is to provide a jaw crusher service tool to assist in the maintenance of a jaw crusher to minimize health and safety risks. A further object of the invention is to provide a hydraulic system for a jaw crusher configured to effect the movement of the moving jaw independently of the jaw crusher motor. In this way, potential safety risks associated with the closing of the moving jaw can be avoided and the time available to effect the removal of the toggle plate can be extended. The objects of the invention have been achieved by the configuration set forth in the appended claim 1. Preferred embodiments are set forth in the dependent claims and will become apparent from the description and items section. [0007] According to the invention, a jaw crusher service tool is provided for supporting a toggle plate during the servicing of a jaw crusher. The crusher comprises a fixed jaw and a movable jaw mounted on a crusher frame and defining a crushing chamber for the material to be crushed, the service tool comprising: a support frame to accommodate and support the toggle plate, and a jaw crusher mounting rotatably fixed to the support frame for mounting the service tool on a jaw crusher wherein the support frame is movable around first and/or second articulation axes (90, 100) between a transport position and first and second toggle plate support positions on the jaw crusher. The jaw crusher tool, therefore, allows the safe handling and manipulation of heavy components, such as toggle plates, during maintenance and service operations. [0008] In any embodiment, the service tool is configured to project laterally from the crusher frame in the first support position to load a toggle plate onto the service tool, and configured to project laterally into the crusher frame to reach below the movable jaw to unload the toggle plate onto the movable jaw in the second support position. [0009] Appropriately, the support structure comprises a tool storage chamber for storing items in a transport and storage position. The support structure can therefore serve a dual function as needed – support and storage of various items. [0010] In one embodiment, the first articulation axis comprises a horizontal pivot axis. The supporting structure can therefore be pivoted and positioned as required, for example, at 90° around the