A jaw assembly for a jaw crusher

Abstract

A jaw assembly for a jaw crusher (1) comprising a jaw liner (18) having a front working face (20), a rear face (21), a top (22) and a bottom (23), a frame (16) forming part of a jaw (2, 3), the frame having a support face which in use abuts the rear face (21) of the jaw liner (18), a first retention plate (25a, 25b) for clamping the top of the jaw liner to the support face, the first retention plate having a base (50) which in use abuts the top of the jaw liner, and a retainer assembly for limiting lateral movement of the jaw liner (18) relative to the frame (16). The retainer assembly comprises a first recess (40) in an upper portion of the rear face (21) of the jaw liner (18), a second recess (51a, 51b) provided in the base (50) of the first retention plate (25a, 25b), and a removable retainer insert (60) extending through the top (22) of the jaw liner (18). The retainer insert comprises a head portion (62) received within the second recess (51a, 51b) and an anchoring portion received within the first recess (40).

Description

Technical Field

[0001] This invention relates to a jaw assembly for a jaw crusher. It also relates to a jaw crusher including the jaw assembly. Background Technology

[0002] A jaw crusher unit typically comprises a fixed jaw and a movable jaw that define a crushing zone. A drive mechanism operates to reciprocate the movable jaw to crush material within that zone. This crushing zone generally converges towards its lower discharge end, allowing crushable material fed to the wider upper end of the zone to fall downwards under gravity, undergoing repeated cyclic crushing movements in response to the cyclical motion of the movable jaw. The crushed material is then discharged under gravity through the lower discharge end onto a conveyor belt for further processing or into a suitable stockpile.

[0003] Due to the forces applied to the jaws, the jaw liners wear down over time and require replacement. Current jaw liners have holes in their working surface to receive hooks when the jaw liners are about to be replaced. These holes increase the cost and complexity of the jaw liner casting process and also reduce the efficiency of the crushing operation.

[0004] Current jaw liners also incorporate a retention assembly designed to limit lateral movement of the jaw liner relative to the jaw arch (frame). The retention assembly consists of an internally cast plug that abuts against the rear face of the jaw liner. Under significant crushing forces, the lateral retention plug can and will indeed shear off, and repairing the casting is both expensive and time-consuming.

[0005] The object of this invention is to overcome at least one of the problems mentioned above. Summary of the Invention

[0006] This objective is achieved by providing a jaw assembly for a jaw crusher, which includes a lateral retainer insert that connects the top of the jaw liner to the underside of a retainer plate, such as a retainer wedge plate. The insert has a head portion housed in a recess within the base of the retaining plate and an anchoring portion housed in a recess within the rear of the jaw liner. The recess does not expose the front of the jaw liner, thus providing protection for the insert. The retainer insert is also fragile, so that it breaks when the jaw assembly encounters a heavy load, allowing the jaw liner to move and preventing structural damage to the fixed jaw. Additionally, because the head portion of the retainer insert is exposed beyond the top of the jaw liner (see...),... Figure 5 and Figure 6 Therefore, when the jaw pad needs to be replaced or rotated, it can be used as a lifting attachment.

[0007] In a first aspect, the present invention provides a jaw assembly for a jaw crusher, comprising: Jaw liner, which has a front working surface, a rear surface, a top and a bottom; A frame that forms part of the jaw, the frame having a support surface that abuts the rear surface of the jaw pad during use; A first retention plate for clamping the top of the jaw pad to the support surface, the first retention plate having a base that abuts the top of the jaw pad during use; and A retainer assembly for limiting lateral movement of the jaw pad relative to the frame.

[0008] In any embodiment, the retainer component includes: The first recess is located in the upper part of the rear surface of the jaw pad; The second recess is disposed in the base of the first retaining plate; and A removable retainer insert extends through the top of the jaw pad and includes a head portion received within a second recess and an anchoring portion received within a first recess.

[0009] In any embodiment, the head portion of the retainer insert includes a lift hole.

[0010] In any embodiment, the retainer insert is fragile.

[0011] In any embodiment, the retainer insert includes a bolt and a corresponding nut, the bolt having a first end including a head portion and a threaded second portion.

[0012] In any embodiment, the jaw assembly includes a first retainer assembly and one (or more) second retainer assemblies, the first retainer assembly being disposed toward each side of the jaw pad and the one (or more) second retainer assemblies being disposed toward the center of the jaw pad.

[0013] In any embodiment, the tolerance defined between the second recess and the head portion of the second retainer is greater than the tolerance defined between the second recess and the head portion of the first retainer.

[0014] In any embodiment, the jaw assembly includes two first retainer assemblies and two second retainer assemblies disposed at the top of the jaw assembly.

[0015] In any embodiment, the first recess extends across a portion or all of the jaw pad to define an inwardly projecting flange in the top of the jaw pad.

[0016] In any embodiment, the second recess or each second recess is formed in the base and rear portion of the retaining wedge plate.

[0017] In any embodiment, the jaw assembly further includes a second retention plate to clamp the bottom of the jaw pad to a support surface, the second retention plate having a top that abuts the bottom of the jaw pad in use.

[0018] In any embodiment, the jaw assembly includes: A second retention plate is used to clamp the bottom of the jaw pad to the support surface. The second retention plate has a top that abuts the bottom of the jaw pad during use. The first recess is located in the lower part of the rear surface of the jaw pad; and A removable retainer insert extends through the bottom of the jaw liner and includes an anchoring portion housed within a first recess and a head portion that engages with the side of a second retaining plate.

[0019] In any embodiment, the first retaining plate and / or the second retaining plate is a retaining wedge plate.

[0020] In any embodiment, the second recess is provided in the base and rear portion of the first retaining plate (e.g., including an opening formed therein).

[0021] In another aspect, the present invention provides a jaw for a jaw crusher, which includes the jaw assembly of the present invention.

[0022] In another aspect, the present invention provides a jaw crusher comprising a fixed jaw and a movable jaw, wherein one of the fixed jaw and the movable jaw comprises a jaw assembly according to the present invention.

[0023] Other aspects and preferred embodiments of the invention are defined and described in the other claims set forth below. Attached Figure Description

[0024] Figure 1 This is a perspective view of the jaw crusher of the present invention.

[0025] Figure 2 yes Figure 1 Another perspective view of a jaw crusher.

[0026] Figure 3 This is a perspective view of a jaw pad that forms part of the jaw assembly of the present invention.

[0027] Figure 4 It is along Figure 3 A three-dimensional sectional view taken from line IV-IV.

[0028] Figure 5 This is a perspective view of a jaw liner that forms part of the jaw assembly of the present invention, wherein the retainer insert is in place.

[0029] Figure 6 It is along Figure 5A three-dimensional sectional view taken from line VI-VI.

[0030] Figure 7 This is a side elevation sectional view of the jaw assembly according to the present invention.

[0031] Figure 8 This is a perspective view of a retainer insert that forms part of the jaw assembly of the present invention.

[0032] Figure 9 This is a perspective view showing the first retaining wedge plate with two second recesses.

[0033] Figure 10 yes Figure 9 Rear view of the first retaining wedge plate.

[0034] Figure 11 This is a side elevation sectional view of the jaw assembly of the present invention.

[0035] Figure 12 This is a front perspective view of the jaw assembly of the present invention.

[0036] Figure 13 This is a front perspective view of the jaw assembly of the present invention, wherein the front portions of the two retaining wedges are cut off to show a second recess for receiving the head portion of the retainer insert.

[0037] Figure 14 This is a front elevation view of part of the base of the jaw liner, showing how it is held in place by the lower retainer plate.

[0038] Figure 15 This is a perspective view of a portion of the base of the jaw liner, showing how it is held in place by the lower retainer plate.

[0039] Figure 16 This is a front perspective view of the jaw assembly of the present invention, wherein the retainer wedge plate is removed and the lifting attachment is connected to the head portion of the retainer insert.

[0040] Figure 17 The lifting chain attached to the lifting attachment is shown. Detailed Implementation

[0041] All publications, patents, patent applications and other references mentioned herein are incorporated herein by reference in their entirety for all purposes, just as each individual publication, patent or patent application is specifically and individually indicated as incorporated herein by reference in its entirety and its contents are cited in whole.

[0042] When used herein and unless otherwise specifically indicated, the following terms are intended to have meanings other than any broader (or narrower) meaning that may be enjoyed in the art: Unless the context otherwise requires, the use of the singular in this document should be understood to include the plural, and vice versa. The terms “a” or “an” used with respect to entities will be understood to refer to one or more of that entity. Therefore, the terms “a,” “one or more,” and “at least one” are used interchangeably in this document.

[0043] As used herein, the term “comprise” or its variations such as “comprises” or “comprising” should be understood to indicate the inclusion of any of the stated wholes (e.g., features, elements, characteristics, properties, methods / process steps, or limitations) or groups of wholes (e.g., features, elements, characteristics, properties, methods / process steps, or limitations), but does not exclude any other wholes or groups of wholes. Therefore, as used herein, the term “comprise” is inclusive or open-ended and does not exclude additional unstated wholes or methods / process steps.

[0044] Example

[0045] The invention will now be described with reference to specific embodiments. These are merely exemplary and for illustrative purposes only: they are not intended to limit the scope of the claimed patent or the described invention in any way. These examples constitute the best mode of practice currently conceived for the practice of the invention.

[0046] Please refer to the attached diagram for details. Figure 1 and Figure 2 The image shows a jaw crusher generally designated 1. The jaw crusher 1 is a general type commonly used in material handling operations to crush rock or other crushable materials. Typically, the crusher 1 is mounted on a material handling apparatus (not shown) that includes other components that cooperate directly or indirectly with the crusher 1, such as conveyors, feeders, hoppers, and / or screens, all of which may be mounted on a chassis (with wheels and / or tracks) or other base.

[0047] The jaw crusher 1 includes a first jaw 2 and a second jaw 3 opposite each other, wherein at least one jaw is movable relative to the other jaw so that the jaws 2 and 3 can crush material between the jaws 2 and 3. In a typical embodiment, the first jaw 2 is fixed, and the second jaw 3 is movable toward and away from the first jaw 2 in an oscillating manner.

[0048] A drive system for moving a movable jaw, or each movable jaw, is provided. Typically, this drive system includes a rotatable wheel 5 (usually a flywheel) coupled to an eccentric shaft 6, which is coupled to one end of a movable jaw 3. The movable jaw 3 is also coupled to a toggle mechanism, which typically includes a toggle plate 10, a tension rod, and a spring or plunger assembly 12. A motor (not shown) is coupled to the wheel 5, for example via a drive belt (not shown), to rotate it. In use, the motor rotates the wheel 5, causing the upper end of the jaw 3 to oscillate, while the toggle mechanism causes or facilitates the oscillating movement of the lower end of the jaw 3.

[0049] Typically, sidewall 14 is positioned next to jaws 2 and 3 to form a crushing chamber together with jaws 2 and 3. All crusher components can be mounted on any suitable base (not shown).

[0050] Each jaw 2, 3 includes a frame 16 (which may be referred to as a jaw arch) and a jaw pad 18. Each jaw pad 18 has a working (crushing) surface 20, a rear surface 21, a top 22, and a bottom 23. The respective crushing surfaces are opposite each other, allowing material to be crushed therebetween. The crushing surface 20 may be grooved, comprising a plurality of parallel ridges 24. Each ridge 24 generally extends in a direction from top to bottom of the jaw pad 18. The jaw pad 18 is generally in the form of a plate (and may be referred to as a jaw plate). The crushing surface 20 is generally rectangular. Each jaw pad 18 is removable from the respective jaw arch 16 to allow replacement of the jaw pad, for example, if the jaw pad becomes excessively worn through use.

[0051] In the illustrated embodiment, each jaw pad 18 is removable. In an alternative embodiment, only one jaw pad may be removable. Alternatively, one of the fracture surfaces may be integrally formed with the corresponding jaw frame, rather than formed on the jaw pad.

[0052] The jaw pad 18 is secured in place on the corresponding jaw frame 16 by a first (upper) retaining wedge 25 and a second (lower) retaining wedge 26. The retainer wedges 25 and 26 are shaped and sized to wed between the jaw pad 18 and the frame 16 to hold the pad in place. For this purpose, the frame 16 may be shaped to define a recess 30 adjacent to the jaw pad 18 (when assembled), into which the locking wedges 25 and 26 may wedge. The wedges are secured to the frame by bolts 35 extending through holes 36 in the plate and holes 37 in the frame, and locked with locking nuts 38. In the illustrated embodiment, the first retaining wedge 25 is provided by two retainer wedges 25a and 25b that are vertically symmetrical about a center.

[0053] The rear surface 21 of the jaw pad 18 includes a first recess 40 extending across the top of the jaw pad and defining an inwardly extending flange 41 forming part of the top 22 of the jaw pad. The flange 41 includes four through holes 42, two lateral through holes 42a, and two central through holes 42b. Each through hole 42 extends from the first recess 40 through to the top of the jaw pad.

[0054] See attached document Figure 9 and Figure 10 The image shows one of the retainer wedge plates 25a and 25b. The plate has a wedge-shaped base 50, which includes two second recesses 51a and 51b formed in the rear portion 52 of the plate and in the base 50. Figure 10 As shown, the recess 51a located above the center of the jaw pad 18 during use is larger than the recess 51b located above the side of the jaw pad during use.

[0055] The jaw assembly of the present invention includes a retainer assembly for securing the jaw pad 18 relative to the frame 16 and restricting lateral movement between them. This is achieved by providing a retainer insert 60 that attaches the jaw pad to the retainer wedge plate. The insert... Figure 8 The insert is shown and includes a bolt 61 and a corresponding threaded nut 64. The bolt 61 has a head portion 62 at one end and a threaded second end 63. The nut 64 forms the anchoring portion of the insert. The head portion 62 includes a lifting eyelet 65. The bolt has a length that allows it to protrude through a flange 41, which forms part of the top of the jaw liner 18. The head portion 62 is sized to be received within recesses 51a and 51b, wherein the tolerance between the head portion 62 and recess 51a is greater than the tolerance between the head portion 62 and recess 51b.

[0056] Figure 5 and Figure 6 The jaw pad is shown with the retainer insert 60 in place. Figure 7 A retainer insert 60 protruding through a hole 42 in a flange 41 is shown, wherein the head portion 62 is located within a second recess 51 and the anchoring portion is located within a first recess 40.

[0057] Figure 13 This is a front perspective view of the jaw assembly of the present invention, wherein the front portions of the retainer wedge plates 25a, 25b are removed to show the second recess 51, in which the head portion 62 is located.

[0058] Reference Appendix Figure 14 and Figure 15A portion of the base of the jaw pad 18 is shown in more detail. The jaw pad is held in place by a second (lower) retaining wedge 26 adjacent to the base of the jaw pad. The rear base of the jaw pad includes a first recess 70 and a retaining insert 60, similar to those previously described, which engages the base of the jaw pad to the wedge 26, wherein the anchoring portion of the insert 60 is received in the recess 70, and the head portion 62 engages the side 71 of the wedge 26.

[0059] Figure 16 and Figure 17 The use of the jaw assembly during jaw liner removal is illustrated. Figure 16 In this process, by unscrewing bolt 35 and removing plates 25a and 25b, the top of the jaw liner 18 and the head portion 62 of the retainer insert 60 protruding above the top of the plates are exposed. The two retainer wedge plates 25a and 25b are then removed. A lifting eyelet 70 is then attached to each head portion 62, and a lifting chain 72 is then attached to that lifting eyelet, as follows. Figure 17 As shown, this allows the jaw liner to be lifted by a crane.

[0060] The advantage of this invention is its replaceability under high failure loads, i.e., the retainer insert would break, thus saving on costly cast items. The recess in the wedge plate provides protection for the retainer insert during normal operation, which would otherwise be subject to material flow and subsequent wear. Furthermore, the removable insert can dock with conventional lifting equipment, allowing the jaw liner to be safely lifted, rotated, or replaced.

[0061] Equivalent example

[0062] The foregoing description has explained in detail the presently preferred embodiments of the invention. Those skilled in the art, taking into account these descriptions, will anticipate many modifications and variations in the practice of the invention. These modifications and variations are intended to be covered within the appended claims.

Claims

1. A jaw assembly of a jaw crusher (1), comprising: Jaw pad (18) having a front working surface (20), a rear surface (21), a top (22) and a bottom (23); A frame (16) that forms part of the jaw (2, 3) has a support surface that is adjacent to the rear surface (21) of the jaw pad (18) in use. First retention plates (25a, 25b) for clamping the top of the jaw pad to the support surface, the first retention plates having a base (50) that abuts the top of the jaw pad in use; and A retainer assembly for limiting lateral movement of the jaw pad (18) relative to the frame (16). The retainer assembly is characterized in that it comprises: The first recess (40) is located on the upper portion of the rear surface (21) of the jaw pad (18); A second recess is provided in the base (50) of the first retaining plate (25a, 25b); and A removable retainer insert (60) extends through the top (22) of the jaw pad (18) and includes a head portion (62) received in the second recess (51a, 51b) and an anchoring portion received in the first recess (40).

2. The jaw assembly according to claim 1, wherein, The head portion (62) of the retainer insert (60) includes a lift hole (65).

3. The jaw assembly according to claim 1 or 2, wherein, The retainer insert (60) is fragile.

4. The jaw assembly according to claim 3, wherein, The retainer insert (60) includes a bolt (61) and a corresponding nut (64), the bolt (61) having a first end including the head portion (62) and a threaded second portion (63).

5. The jaw assembly according to any one of claims 1-2, wherein, The retainer assembly includes a first retainer assembly and a second retainer assembly, the first retainer assembly being disposed toward each side of the jaw pad, and the second retainer assembly being disposed toward the center of the jaw pad, wherein the tolerance defined between the second recess and the head portion (62) of the second retainer assembly is greater than the tolerance defined between the second recess and the head portion (62) of the first retainer assembly.

6. The jaw assembly of claim 5, comprising two first retainer assemblies and two second retainer assemblies disposed on top of the jaw assembly.

7. The jaw assembly according to any one of claims 1-2, wherein, The first recess (40) extends across the rear face (21) of the jaw pad (18) to define an inwardly projecting flange (41) in the top of the jaw pad.

8. The jaw assembly according to any one of claims 1-2, wherein, The second recess or each of the second recesses is formed by a recess in the base (50) and the rear portion (52) of the first retaining plate (25a, 25b).

9. The jaw assembly according to any one of claims 1-2, further comprising: A second retention plate (26) is used to clamp the bottom (23) of the jaw pad to the support surface. The second retention plate has a second retention plate top that is adjacent to the bottom of the jaw pad in use. The third recess (70) is located in the lower portion of the rear surface of the jaw pad; as well as A removable retainer insert (60) extends through the bottom of the jaw pad and includes an anchoring member housed in the third recess (70) and a head portion (62) coupled to the side (71) of the second retainer plate.

10. The jaw assembly according to any one of claims 1-2, wherein, The first retaining plate (25a, 25b) is a retaining wedge plate.

11. The jaw assembly according to any one of claims 1-2, wherein, The second recess (51a, 51b) is disposed in the base (50) and the rear portion (52) of the first retaining plate (25a, 25b).

12. A jaw (2, 3) of a jaw crusher (1), comprising a jaw assembly according to any one of claims 1 to 11.

13. A jaw crusher (1) comprising a fixed jaw (2) and a movable jaw (3), wherein one of the fixed jaw and the movable jaw comprises a jaw assembly according to any one of claims 1 to 11.

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