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EP-4295954-B1 - A JAW CRUSHER SERVICE TOOL

EP4295954B1EP 4295954 B1EP4295954 B1EP 4295954B1EP-4295954-B1

Inventors

  • Graydon, Stuart
  • SMYTH, STUART

Dates

Publication Date
20260513
Application Date
20220621

Claims (15)

  1. A jaw crusher service tool (10) for supporting a toggle plate (180) during service of a jaw crusher (20) comprising a fixed jaw (30) and a movable jaw (40) mounted in 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 (180), and a jaw crusher mounting (80) attached to the support frame (70) for mounting the service tool (10) on a jaw crusher (20); wherein the support frame (70) is movable about first and/or second articulation axes (90, 100) between a transport position and an item (15) supporting position on the jaw crusher (20).
  2. The jaw crusher service tool (10) according to claim 1 wherein the support frame (70) comprises a tool storage chamber (143) for storing items in a transport storage position.
  3. The jaw crusher service tool (10) according to any of claim 1 or claim 2 wherein the first articulation axis (90) comprises a horizontal pivot axis (110).
  4. The jaw crusher service tool (10) according to any of claims 1 to 3 wherein the second articulation axis (100) comprises a vertical pivot axis (120).
  5. The jaw crusher service tool (10) according to claim 4 wherein the mounting (80) defines the horizontal pivot axis (110) and the vertical pivot axis (120).
  6. The jaw crusher service tool (10) according to any of claims 1 to 5 wherein the support frame (70) comprises a platform (140).
  7. The jaw crusher service tool (10) according to any of claims 1 to 6 wherein the support frame (70) comprises an item grip (150, 151) for gripping an item (15).
  8. The jaw crusher service tool (10) as according to any of claims 1 to 7 wherein the jaw crusher mounting (80) is a detachable jaw crusher mounting (160).
  9. The jaw crusher service tool (10) according to any of claims 1 to 8 wherein the jaw crusher mounting (80) is configured to be mountable on a crusher chassis (170) or a crusher frame (50).
  10. A jaw crusher (20) comprising a jaw crusher service tool (10) according to any of claims 1 to 10.
  11. The jaw crusher (20) according to claim 10 wherein the jaw crusher (20) comprises a motor providing a primary power source to a primary hydraulic pump of the jaw crusher (20); a crusher frame (50) supporting a fixed jaw (30) and a movable jaw (40) defining a crushing chamber (60); a cross beam transversely mounted in the crusher frame (50); a toggle plate extending between the cross beam and the movable jaw (40), a hydraulic system having a primary pump line (221) powered by the primary hydraulic pump for moving the movable jaw (40) and clamping the toggle plate, and a secondary primary pump line (222) powered by the primary hydraulic pump for moving the movable jaw (40) and unclamping the toggle plate; wherein the hydraulic system comprises an auxiliary pump (230) powered independently of the primary pump for effecting movement of the movable jaw (40).
  12. The jaw crusher (20) according to claim 11, wherein the auxiliary pump (230) comprises a battery powered auxiliary pump (240).
  13. The jaw crusher (20) according to claim 12 wherein the battery powered auxiliary pump (240) is a 24V maintenance pump.
  14. The jaw crusher (20) according to any of claims 12 or 13 wherein the auxiliary pump (230) is in an accumulator block (210) on the crusher frame (50).
  15. The jaw crusher (20) according to claim 14 wherein the accumulator block (210) comprises a shut-off valve (390) to isolate the hydraulic system from the auxiliary pump (230) as required.

Description

Field of Invention This invention relates to a jaw crusher service tool for supporting an item such as a toggle plate during service of the jaw crusher. The invention also relates to a hydraulic system configured to operate a jaw crusher independently of a primary power source. Background of the Invention A variety of different crushers have evolved for processing bulk material such as stone, minerals and both domestic and industrial waste including construction materials to generate a crushed product for subsequent processing or disposal. Jaw crushers are generally made up of a fixed jaw and a movable jaw mounted in a crusher frame in which the movable jaw is movable relative to the fixed jaw to generate an impelling force to crush material in a crushing chamber defined between the two jaws. An example of a jaw crusher is disclosed in KR 100765853 B1. The jaw crusher includes a cross beam in the crusher frame and a toggle plate clamped between the cross beam and the movable jaw. A hydraulic system applies a load to the cross beam, which is transmitted to the movable jaw via the toggle plate to resist the forces generated during crushing. Jaw crushers can be mobile or stationary crushers where the mobile crushers are provided with a wheeled or tracked chassis and the stationary crushers are provided with a stationary crusher mainframe. Jaw crushers require regular maintenance and service and, due to the forces to which the jaw crusher is subjected during use, components of the jaw crusher sometimes require assembly, disassembly, replacement or removal for servicing e.g. 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, such items must generally be manually removed and replaced from below. However, toggle plates and other jaw crusher components can be extremely heavy and cumbersome (e.g. toggle plates typically have a weight of about 100kg) with the result that the manual handling of the items can present significant health and safety risks to service personnel. Known jaw crushers are also equipped with hydraulic systems, powered by the jaw crusher motor, to effect movement of the movable jaw and to clamp a toggle plate between the movable jaw and the cross beam. Accordingly, in order to make the toggle plate available for removal, the jaw crusher motor is activated to lock open the movable jaw and is then switched off to allow manual access to the toggle plate. However, once the motor is switched off, the hydraulic fluid is returned through the hydraulic system under gravity resulting in closure of the movable jaw. This can also present a safety hazard to service personnel and reduce the time available to effect removal of the toggle plate. An object of the invention is to provide a jaw crusher service tool to assist in the servicing of a jaw crusher to minimise health and safety risks. A further object of the invention is to provide a hydraulic system for a jaw crusher configured to effect movement of the movable jaw independently of the jaw crusher motor. Summary of the Invention According to the invention there is provided a jaw crusher service tool as defined by claim 1. The jaw crusher tool therefore allows for safe handling and manipulation of heavy components such as toggle plates, during servicing and maintenance operations. Suitably, the support frame comprises a tool storage chamber for storing items in a transport cum storage position. The support frame can therefore serve a dual function as required - support and storage of various items. In one embodiment, the first articulation axis comprises a horizontal pivot axis. The support frame can therefore be pivoted and positioned as required e.g. through 90° about the horizontal axis. In any embodiment, the second articulation axis comprises a vertical pivot axis. The support frame can therefore be pivoted and positioned as required e.g. through 180° about the vertical axis. In one embodiment, the mounting defines the horizontal pivot axis and the vertical pivot axis. The mounting therefore serves a dual function and ensures that the jaw crusher service tool is compact and space saving. Suitably, the support frame comprises a platform. The platform defines a support surface for items. In one embodiment, the support frame comprises an item grip or gripping an item. Items are therefore supported securely on the platform. Optionally, the jaw crusher mounting is a detachable jaw crusher mounting. The jaw crusher service tool can therefore be removed and repositioned as required on the jaw crusher. Suitably, the jaw crusher mounting is configured to be mountable on a crusher chassis or a crusher frame. The jaw crusher service tool can therefore be located in various positions on the jaw crusher. The invention also extends to a jaw crusher comprising a jaw crusher service tool as hereinbefore defined. In any embodiment, the jaw crusher comprises: a mot