System for overload protection and clearance setting for compact eccentric crusher

Abstract

The invention relates to a system for overload protection and gap setting for a compact eccentric crusher. A compact eccentric crusher according to the present disclosure includes a crushing jaw adjustment assembly for adjusting the size of a crushing gap between a crushing roller and a crushing jaw. The adjustment assembly includes a connecting arm having a first end connected to the second end of the crushing jaw. The second end of the connecting arm is connected to a slider mounted to move along a slider track. The adjustment assembly includes a drive unit operable to move the slider along the slider track, resulting in corresponding movement of the connecting arm and the second end of the crushing jaw. In one embodiment, the drive unit is a hydraulic cylinder having a cylinder rod connected to the slider. In overload conditions, the adjustment assembly allows the link arm to move against the drive unit and allows the crushing jaw to move away from the crushing roller to adjust the crushing gap.

Description

Overload protection and clearance setting system for compact eccentric crushers Technical Field

[0001] This disclosure generally relates to a system for adjusting the crushing gap in a compact eccentric crusher. More specifically, this disclosure relates to an overload protection system operable to adjust the size of the crushing gap and prevent overload conditions in the compact eccentric crusher. Background Technology

[0002] Currently, different types of crushers are being used to reduce the size of mineral materials present in the infeed of the crusher. After processing, the size of the mineral materials has been reduced, resulting in a supply of mineral materials with smaller individual components. In these types of crushers, the moving crushing members move toward and away from the stationary crushing members to create a varying crushing gap, thereby crushing the mineral materials in the infeed.

[0003] One type of crusher used to reduce the size of mineral materials is called a compact eccentric crusher. In a compact eccentric crusher, freely rotating crushing rollers are mounted to an eccentric shaft via a series of roller bearings. The crushing rollers are spaced apart from a generally fixed crushing jaw. The eccentric arrangement of the crushing rollers on the eccentric drive shaft causes the rollers to move eccentrically toward and away from the fixed crushing jaw. This movement changes the size of the crushing gap, causing the mineral material fed into the compact eccentric crusher to be crushed within the crushing gap.

[0004] During operation, the crushing roller is freely rotatable on the eccentric drive shaft, causing it to slowly rotate around the shaft in the opposite direction to its rotation. Although the crushing force is generated by the lateral movement of the crushing roller relative to the fixed crushing jaw, the free rotation of the crushing roller distributes wear across all parts of its outer circumference.

[0005] The size of the crushing gap between the crushing roller and the crushing jaw determines the size of the mineral particles discharged from a compact eccentric crusher. The size of the crushing gap is adjusted by moving the crushing jaw toward or away from the crushing roller. In currently available eccentric crushers, the adjusting assembly is positioned behind the crushing jaw and can be operated to move the jaw into and out of the crushing chamber to adjust the crushing gap. In this type of adjusting assembly, the crushing force acting on the crushing jaw is directly resisted by the adjusting assembly, which increases the size of the drive unit (such as a hydraulic cylinder) required to both adjust the size of the crushing gap and resist the crushing force during operation.

[0006] The inventors of this disclosure have recognized the need to improve the jaw control assembly to allow jaw movement and response to overload conditions. The system of this disclosure includes a jaw control assembly that converts the kinetic force generated by the drive unit into movement of a connecting arm coupled to the jaw. This transfer of force reduces the required size of the drive unit and allows the jaw control assembly to release abnormal tramp forces generated in the crushing gap. Summary of the Invention

[0007] This disclosure generally relates to a system for adjusting the crushing gap in a compact eccentric crusher. More specifically, this disclosure relates to an overload protection system operable to adjust the size of the crushing gap and prevent overload conditions in the compact eccentric crusher.

[0008] According to an exemplary embodiment of this disclosure, a crusher is provided operable to crush a supplied mineral material. The crusher includes a crusher frame that at least partially defines a crushing chamber. Inside the crushing chamber, a crushing roller is mounted to a drive shaft to rotate within the crushing chamber. A crushing jaw is positioned to further define the crushing chamber. The crushing jaw is spaced apart from the crushing roller such that a crushing gap is formed between the crushing roller and the crushing jaw. The crushing jaw includes a pivotally mounted first end such that a second end of the crushing jaw can be moved into and out of the crushing chamber to adjust the crushing gap.

[0009] The crusher includes a jaw adjustment assembly operable to control the movement of a second end of the jaw, thereby controlling the size of the crushing gap between the jaw and the crushing roller. According to an exemplary embodiment of this disclosure, the crusher includes a pair of jaw assemblies mounted on opposite sides of a crusher frame to act on each side of the jaw. Each jaw assembly includes a connecting arm having a first end and a second end. The first end of the connecting arm is connected to the second end of the jaw, such that movement of the first end of the connecting arm causes movement of the second end of the jaw.

[0010] The second end of the connecting arm is connected to a slider, which is mounted to move longitudinally along a slider track. Movement of the slider along the slider track causes movement of the second end of the connecting arm, which in turn causes movement of the first end of the connecting arm. According to an exemplary embodiment, the slider track is positioned at an angle relative to the vertical direction, such that movement of the slider along the slider track causes horizontal and vertical movement of the second end of the connecting arm.

[0011] A drive unit is included as part of the jaw crusher assembly and is operable to control the movement of a slider along a slider track. In one exemplary embodiment, the drive unit is a hydraulic cylinder including a cylinder rod that can extend and retract from a cylinder body. One end of the cylinder rod is connected to the slider, such that the extension and retraction of the cylinder rod controls the movement of the slider and the connected connecting arm. The opposite end of the connecting arm is connected to a second end of the jaw crusher, thereby translating the movement of the slider into the movement of the jaw crusher.

[0012] According to another exemplary embodiment of this disclosure, a compact eccentric roll crusher is provided, operable to crush a supplied mineral material. The crusher includes a crusher frame that at least partially defines a crushing chamber. Inside the crushing chamber, a crushing roll is mounted to a drive shaft for eccentric movement within the crushing chamber. A crushing jaw is positioned to further define the crushing chamber. The crushing jaw is spaced apart from the crushing roll such that a crushing gap is formed between the crushing roll and the crushing jaw. The crushing jaw includes a pivotally mounted first end such that a second end of the crushing jaw can be moved into and out of the crushing chamber to adjust the crushing gap.

[0013] The crusher includes a pair of jaw adjusting assemblies operable to control the movement of a second end of the jaws, thereby controlling the size of the crushing gap between the jaws and the crushing rollers. According to an exemplary embodiment of this disclosure, the pair of jaw adjusting assemblies are mounted on opposite sides of a crusher frame to act on each side of the jaws. Each jaw assembly includes a connecting arm having a first end and a second end. The first end of the connecting arm is connected to the second end of the jaw, such that movement of the first end of the connecting arm causes movement of the second end of the jaw.

[0014] The second end of the connecting arm is connected to a slider, which is mounted to move longitudinally along a slider track. Movement of the slider along the slider track causes movement of the second end of the connecting arm, which in turn causes movement of the first end of the connecting arm. According to an exemplary embodiment, the slider track is angularly positioned relative to the vertical direction, such that movement of the slider along the slider track causes horizontal and vertical movement of the second end of the connecting arm.

[0015] The drive unit is included as part of the jaw assembly of a compact eccentric crusher and is operable to control the movement of a slider along a slider track. In one exemplary embodiment, the drive unit is a hydraulic cylinder including a rod that can extend and retract from a cylinder body. One end of the rod is connected to the slider, such that the extension and retraction of the rod controls the movement of the slider and a connected connecting arm. The opposite end of the connecting arm is connected to a second end of the jaw, thereby translating the movement of the slider into movement of the jaw.

[0016] According to another exemplary embodiment of this disclosure, an adjustment assembly is provided for use with a crusher operable to crush a supplied mineral material. The crusher includes a crusher frame that at least partially defines a crushing chamber. Within the crushing chamber, a crushing roller is mounted to a drive shaft to rotate within the crushing chamber. A crushing jaw is positioned to further define the crushing chamber. The crushing jaw is spaced apart from the crushing roller such that a crushing gap is formed between the crushing roller and the crushing jaw. The crushing jaw includes a pivotally mounted first end such that a second end of the crushing jaw can be moved into and out of the crushing chamber to adjust the crushing gap.

[0017] The adjustment assembly includes a pair of jaw adjustment assemblies operable to control the movement of a second end of the jaw, thereby controlling the size of the crushing gap between the jaw and the crushing roller. According to an exemplary embodiment of this disclosure, the pair of jaw assemblies are mounted on opposite sides of a crusher frame to act on each side of the jaw. Each jaw assembly includes a connecting arm having a first end and a second end. The first end of the connecting arm is connected to the second end of the jaw, such that movement of the first end of the connecting arm causes movement of the second end of the jaw.

[0018] The second end of the connecting arm is connected to a slider, which is mounted to move longitudinally along a slider track. Movement of the slider along the slider track causes movement of the second end of the connecting arm, which in turn causes movement of the first end of the connecting arm. According to an exemplary embodiment, the slider track is angularly positioned relative to the vertical direction, such that movement of the slider along the slider track causes horizontal and vertical movement of the second end of the connecting arm.

[0019] The drive unit is included as part of the jaw assembly of a compact eccentric crusher and is operable to control the movement of a slider along a slider track. In one exemplary embodiment, the drive unit is a hydraulic cylinder including a rod that can extend and retract from a cylinder body. One end of the rod is connected to the slider, such that the extension and retraction of the rod controls the movement of the slider and the connected connecting arm. The opposite end of the connecting arm is connected to a second end of the jaw, thereby translating the movement of the slider into movement of the jaw.

[0020] Various other features, objects and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings illustrate the currently envisioned best mode for implementing this disclosure. In the drawings: Figure 1 is a side view showing the overall operation of a compact eccentric crusher including a fixed crushing jaw and a movable crushing roller; Figure 2 is a perspective view of a compact eccentric crusher including the subject matter of this disclosure; Figure 3 is a bottom perspective view of the compact eccentric crusher of this disclosure; Figure 4 is a cross-sectional view of the compact eccentric crusher showing the crushing jaw and crushing roller; Figure 5 is a side view of the compact eccentric crusher with the jaw adjustment assembly in the fully retracted position; Figure 6 is a side view of the compact eccentric crusher with the jaw adjustment assembly in the intermediate adjusted position; and Figure 7 is a side view of the compact eccentric crusher with the jaw adjustment assembly in the fully extended position. Detailed Implementation

[0022] Figure 1 generally illustrates the operation of a compact eccentric crusher 10. The compact eccentric crusher 10 shown in Figure 1 is a representative embodiment included to illustrate the general operation and configuration of the compact eccentric crusher 10, and is not intended to limit the scope of this disclosure as it is included for illustrative purposes. As shown in Figure 1, the compact eccentric crusher 10 receives a feed of mineral material 12 from a feed conveyor 14. In the illustrated embodiment, the feed of mineral material 12 may include particles of varying sizes, all of which fall onto a feed screen 16, which includes slots or other openings that allow sufficiently small particles to bypass the primary crushing operation. The feed screen 16 guides larger particles from the feed of mineral material into a crushing chamber 18. In other contemplated embodiments, the feed screen 16 may be omitted, allowing the entire feed of material to be guided into the crushing chamber 18.

[0023] Crushing chamber 18 is generally formed between crushing jaw 20 and the outer surface 22 of crushing roller 24. Crushing roller 24 is mounted on drive shaft 26, which is supported by an eccentric bearing assembly that causes eccentric movement of the outer surface 22 of crushing roller 24 along an eccentric path, including movement toward and away from fixed crushing jaw 20, as schematically shown by arrow 28. The eccentric movement of the entire crushing roller 24 toward and away from fixed crushing jaw 20 causes the size of crushing gap 30 to increase and decrease. During operation of crushing roller 24, the increase and decrease in the size of crushing gap 30 causes larger particles in the feed stream to be crushed, thereby producing outlet product stream 32.

[0024] In addition to the movement of the entire crushing roller 24, the position of the crushing jaw 20 can be adjusted according to this disclosure to change the maximum and minimum dimensions of the crushing gap 30. However, during the crushing operation, it is the eccentric movement of the crushing roller 24 relative to the fixed crushing jaw 20 that generates the crushing force, thereby converting the inlet product flow into the outlet product flow 32.

[0025] Referring now to Figures 2 and 3, a compact eccentric crusher 10 constructed according to the present disclosure will now be further described. In the embodiment shown in Figures 2 and 3, the compact eccentric crusher 10 is shown as including a frame 36 designed to support the eccentric movement of a crusher roller and receive a product stream at an open upper end 38, which is fed into an internal crushing chamber 18, as schematically shown in Figure 1. The frame 36 includes a pair of sidewalls 40, each spaced apart from the other to define a portion of the crushing chamber. A rear wall 42 further defines the crushing chamber, while a jaw assembly 44 defines the front portion of the crushing chamber.

[0026] The crusher jaw assembly 44 includes a crusher jaw 20 comprising a series of wear plates 46, best shown in FIG4. The wear plates 46 define contact surfaces 48 for the crusher jaw 20, which are spaced apart from the outer surface 22 of the crushing roller 24. The gap between the outer surface 22 of the crushing roller 24 and the contact surfaces 48 of the wear plates 46 forms a crushing gap 30 for crushing mineral material fed into the crushing chamber 18 of the compact eccentric crusher 10. In the embodiment shown in FIG4, a first end 50 of the upper portion of the crusher jaw 20 is mounted to rotate about a pivot 52. A second end 54 of the lower portion of the crusher jaw 20 can pivot relative to the pivot 52 to move inward and outward, thereby adjusting the size of the crushing gap 30. As previously described, during operation of the compact eccentric crusher 10, the crushing jaw 20 is held in a stationary position, while the crushing roller 24 moves along the eccentric path to increase and decrease the size of the crushing gap 30, thereby crushing the mineral material.

[0027] The crushing roll 24 includes a series of wear members 56 mounted on it to define an outer surface 22. During operation of the compact eccentric crusher 10, the outer surface 22 contacts the mineral material being crushed and is therefore subjected to wear. When sufficiently worn, the individual wear members 56 can be removed from the crushing roll 24. The crushing roll 24 is mounted to the drive shaft 26 via a series of roller bearings, allowing the crushing roll 24 to rotate freely relative to the drive shaft 26. During normal operation, the crushing roll 24 may not rotate or may rotate in the opposite direction to the rotation of the drive shaft 26. During operation of the compact eccentric crusher 10, the drive shaft 26 can be rotated by one or more drive motors.

[0028] As shown in the cross-sectional view of Figure 4, the eccentric bearing 58 is located between the crushing roller 24 and the drive shaft 26. In this way, the rotation of the drive shaft 26 causes the entire crushing roller 24 to move eccentrically, resulting in lateral movement of the crushing roller 24 toward and away from the crushing jaw 20. This eccentric movement causes the size of the crushing gap 30 to increase and decrease, so as to crush the mineral material within the crushing gap 30.

[0029] Referring back to Figures 2 and 3, the compact eccentric crusher 10 also includes a flywheel 60 mounted to either side of the drive shaft 26. The flywheel 60 provides rotational mass that combines with the mass of the crushing roll during operation of the compact eccentric crusher 10. The flywheel 60 is axially mounted outward from bearing support structures 62 located on each side of the compact eccentric crusher 10. The bearing support structure 62 provides support for one of a pair of bearing assemblies for supporting the crushing roll within an open crushing chamber 18 defined by a frame.

[0030] Referring now to Figure 5, the first end 50 of the crushing jaw 20 is shown to be supported by an upper pivot 52. The upper pivot 52 passes through and is supported by a pair of upper bearing assemblies 64 on each side of the frame 36. Each upper bearing assembly 64 is located near the top of the frame 36 of the compact eccentric crusher 10. The pivotal connection between the upper first ends 50 of the crushing jaw 20 allows the lower second end 54 of the crushing jaw 20 to move into and out of the crushing chamber 18, as best indicated by arrow 55 in Figure 4. This movement controls the size of the crushing gap 30.

[0031] According to this disclosure, the jaw adjustment assembly 66 is positioned on both the first and second sides of the crusher frame 36 and is operable to control the movement of the second end 54 of the jaw 20. By using the jaw adjustment assembly 66 located on each side of the crusher, the position of the jaw 20 can be adjusted to control the size of the crushing gap 30 formed within the compact eccentric crusher 10. Additionally, the jaw adjustment assembly 66 allows the jaw to move outward to respond to overload conditions in the crushing chamber 18, such as when abnormal material enters the crushing gap 30 and cannot be crushed.

[0032] Referring back to Figure 4, the compact eccentric crusher 10 includes a crushing roller 24 located within a crushing chamber 18. The crushing roller 24 includes a vertical centerline 68 that also extends through the center of the drive shaft 26. The vertical centerline 68 defines an inlet side and an outlet side of the crushing roller 24, the inlet side being located to the left of the centerline 68 in Figure 4, and the outlet side being located to the right of the centerline 68 in Figure 4. The outlet side includes a crushing gap 30. When mineral material is fed into the crushing chamber 18, the material travels to the outlet side of the crushing roller 24 and enters the crushing gap 30. During crushing operation, the crushing force generated by the eccentric movement of the crushing roller 24 produces an outward force pointing towards the crushing jaw 20 and a reverse inward crushing force pointing towards the outer surface of the crushing roller 24, as indicated by the reverse arrows in Figure 4. Since the jaw 20 can pivot about the pivot 52, the operating components of the compact eccentric crusher 10 must be able to resist the outward crushing force on the jaw 20 to prevent the jaw 20 from undergoing undesirable pivoting rotation about the pivot 52.

[0033] Referring back to Figure 5, the jaw adjustment assembly 66 on the side of the crusher frame includes a connecting arm 70 extending between a first end 72 and a second end 74. The first end 72 of the connecting arm 70 is securely connected to a lower support shaft 76. As shown in the cross-sectional view of Figure 4, the lower support shaft 76 extends through an opening formed in the frame 78 of the jaw 20 near the second end 54. As shown in Figure 5, the lower support shaft 76 is rotatable within the opening formed between the first end 72 of the connecting arm 70 and the retaining bracket 80. In this way, the first end 72 of the connecting arm 70 is connected to the frame 78 of the jaw 20 while allowing the first end 72 to rotate generally relative to the lower support shaft 76.

[0034] As shown in Figure 5, the second end 74 of the connecting arm 70 is attached to a slider 82 that forms another part of the jaw crusher adjustment assembly 66. Specifically, the second end 74 of the connecting arm 70 is secured to the slider by a first pivot pin 84. The first pivot pin 84 allows relative rotational movement between the slider 82 and the second end 74 of the connecting arm 70. The slider 82 is mounted to move along a slider track 86, which extends from a lower end 88 to an upper end 90. The slider track 86 includes a path that allows the slider 82 to move along a fixed longitudinal path in both a first direction and a second direction along the entire length of the slider track 86. Since the slider 82 is connected to the second end 74 of the connecting arm 70, movement of the slider 82 in the direction indicated by the arrow in Figure 5 results in movement of the slider arm in the direction indicated by arrow 92. Therefore, movement of the slider 82 along the slider track 86 controls movement of the first end 72 of the connecting arm 70, and thus controls movement of the second end 54 of the jaw crusher frame 78.

[0035] The jaw crusher adjustment assembly 66 also includes a drive unit 94 operable to move the slider 82 along the length of the slider track 86. In the exemplary embodiment shown in FIG. 5, the drive unit 94 is a hydraulic cylinder 96, which includes a rod 98 capable of extending and retracting relative to the cylinder body 100. As is known in the art, the hydraulic cylinder 96 is connected to a supply source of pressurized hydraulic fluid to control the retraction and extension of the rod 98 relative to the cylinder body 100. Although the hydraulic cylinder 96 is shown in the exemplary embodiment of FIG. 5, the hydraulic cylinder 96 may be replaced by other drive units, such as, but not limited to, electric motors and rotary drive screws. It is contemplated that the drive unit 94 may be any type of drive unit capable of moving the slider 82 longitudinally along the slider track 86, as indicated by arrow 87.

[0036] In the embodiment shown in Figure 5, the outer end 102 of the cylinder rod 98 is connected to a second pin 104 that extends through another portion of the slider 82. This connection causes the movement of the slider 82 to be directly responsive to the movement of the cylinder rod 98.

[0037] As can be understood in Figure 5, the first end 72 of the connecting arm 70 is located on the opposite side of the vertical centerline 68 extending through the crushing roller. In addition, the drive unit 94, the slider 82, and the slider track 86 are also located on the inlet side of the centerline 68, while the first end 72 and its connection to the second end 54 of the crushing jaw 20 are located on the outlet side of the centerline 68.

[0038] As best shown in Figure 5, the slider track 86 is angled relative to both the vertical centerline 68 and the generally horizontal bottom surface 106 of the compact eccentric crusher 10. The angle α shown in Figure 5 is approximately 135°, but other values ​​of angle α are considered within the range of this disclosure. As can be understood in Figure 5, the longitudinal movement of the slider 82 in the direction indicated by arrow 87 has both vertical and horizontal components. This longitudinal movement is generally translated into horizontal and slightly vertical movement of the connecting arm 70, also as shown by arrow 92 in Figure 5. The movement indicated by arrow 92 in Figure 5 causes the second end 54 of the crusher frame 78 to move in and out of the crushing chamber to adjust the size of the crushing gap 30, as shown in Figure 4. In this way, the operation of the drive unit 94 of the jaw adjustment assembly 66 can control the position of the second end 54 of the jaw 20, thereby controlling the size of the crushing gap 30.

[0039] Figure 5 shows the jaw adjustment assembly 66 in the fully retracted position, with the cylinder rod 98 fully retracted into the cylinder body 100. In the fully retracted position, the slider 82 moves upward to its maximum vertical position. Since the slider 82 is connected to the connecting arm 70, the connecting arm 70 moves the second end 54 of the jaw 20 as far inward as possible into the crushing chamber to minimize the size of the crushing gap 30.

[0040] Referring now to Figure 6, when it is necessary to increase the size of the crushing gap 30, the drive unit 94 is activated, which causes the cylinder rod 98 to extend further from the cylinder body 100, thereby causing the slider 82 to move downward, as indicated by arrow 108. The downward movement of the slider 82 along the slider track 86 causes the connecting arm 70 to move in the direction indicated by arrow 109, thus causing the second end 54 of the crushing jaw 20 to move out of the crushing chamber, thereby expanding the size of the crushing gap 30. The slider 82 is shown in an intermediate position between the fully retracted position in Figure 5 and the fully extended position shown in Figure 7, and will be described below.

[0041] When the drive unit 94 is further activated as shown in FIG. 7, the cylinder rod 98 extends further from the cylinder body 100 until the slider 82 reaches the fully extended position. In the fully extended position, the slider 82 is positioned adjacent to the bottom surface 106. The additional movement of the slider 82 along the slider track 86 in the direction indicated by arrow 108 in FIG. 6 causes the second end 54 of the crushing jaw 20 to move away from the crushing roller and increase the size of the crushing gap. When the slider 82 is positioned in the fully extended position as shown in FIG. 7, the locking bracket 110 mounted on the bottom surface 111 of the connecting arm 70 near the first end 72 aligns with the support frame 112. When the locking bracket 110 is aligned with the support frame 112, the locking bracket 110 can be secured to the support frame 112 by using a locking pin (not shown) extending through the aligned opening 113.

[0042] Referring back to Figure 5, according to the illustrated embodiment, the compact eccentric crusher 10 may include a pre-tensioning system 114 mounted between the sidewall 40 of the frame 36 and the frame 78 of the crushing jaw 20. The pre-tensioning system 114 is designed to include a preset tension that resists crushing forces generated within the crushing chamber while allowing the crushing jaw 20 to rotate outward when uncrushable aberrations enter the crushing gap. In the embodiment shown in Figure 5, the pre-tensioning system 114 includes a pre-tensioning cylinder 116, which includes a cylinder body 118 and a cylinder rod 120. The cylinder body 118 includes a supply source of pressurized fluid, such as resisting outward movement of the cylinder rod 120 during the reception of aberrations within the crushing gap.

[0043] Although not shown in the figures, it is conceivable that the jaw adjustment assembly 66 (comprising a pair of hydraulic cylinders 96 on each side of the crusher frame 36) could be replaced by a single traction cylinder having a rod directly connected to the lower support shaft 76. In this contemplated embodiment, the traction cylinder could be used without requiring the slider 82 and slider rail 86. However, such a traction cylinder would need to be significantly larger than the pair of hydraulic cylinders 96 shown in the exemplary embodiments of this disclosure. Furthermore, it is conceivable that other types of mechanisms could be utilized, located on the inlet side of the centerline 68, and, as previously described, for moving the second end 54 of the jaw 20.

[0044] As can be understood from the comparison of Figures 5-7, the operation of the hydraulic cylinder 96 to move the cylinder rod 98 into and out of the cylinder body 100 generates a driving force extending along the axis of the cylinder rod 98. The slider 82 converts the sliding force into a force extending along the length of the connecting arm 70 to cause movement of the second end 54 of the frame 78 of the jaw crusher 20. In this way, the combination of the slider 82, the slider rail 86, and the connecting arm 70 transforms the linear force generated by the hydraulic cylinder 96 into a moving force that causes the desired movement of the second end 54 of the jaw crusher 20.

[0045] During overload conditions, the jaw adjustment assembly 66 of this disclosure allows the second end 54 of the jaw 20 to bend outward when uncrushable material is present or when an overload condition occurs. When an overload condition occurs or uncrushable aberrant material enters the crushing gap, the aberrant material generates a large instantaneous outward force on the second end 54 of the jaw 20. To prevent damage to the crushing roller and jaw, it is desirable to allow the jaw to bend outward to allow uncrushable material to pass through. The large outward force is at least partially directed towards the second end 54 of the jaw 20. The large peak force attempts to move the first end 72 of the connecting arm 70 to the right and away from the crushing gap. This force on the connecting arm 70 is transmitted to the second end 74 of the connecting arm 70. The transmitted force generates a force on the slider 82 to cause the slider 82 to move downward along the slider track 86. This movement of the slider 82 pulls the cylinder rod 98 out of the cylinder body 100, thereby depressurizing the cylinder body 100, which allows the slider 82 to move downward to release the aberrant material present in the crushing gap. As shown in Figure 5, the jaw adjustment assembly 66 is configured on the opposite side of the centerline 68 to the jaw 20 to help separate the crushing force generated by the compact eccentric crusher 10 during operation.

[0046] This specification discloses the disclosure (including the best mode) by using examples and also enables those skilled in the art to make and use the disclosure. The patentable scope of this disclosure is defined by the claims and may include other examples that would occur to those skilled in the art. Such other examples shall fall within the scope of the claims if they have structural elements that are indistinguishable from the literal wording of the claims, or if they include equivalent structural elements that are not substantially different from the literal wording of the claims.

Claims

1. A crusher for crushing fed mineral materials, the crusher comprising: A crusher frame that at least partially defines a crushing chamber; Crushing rollers are mounted to a drive shaft to move within the crushing chamber; A crushing jaw has a first end and a second end, wherein the first end is pivotally mounted such that the second end can move into and out of the crushing chamber to adjust the crushing gap between the crushing jaw and the crushing roller; a crushing jaw adjustment assembly is positioned on a first side and a second side of the crusher frame, the crushing jaw adjustment assembly being operable to control the movement of the second end of the crushing jaw, each crushing jaw adjustment assembly including: a connecting arm having a first end and a second end, wherein the first end is connected to the second end of the crushing jaw; a slider mounted to move longitudinally along a slider track, wherein the second end of the connecting arm is connected to the slider; and a drive unit operable to move the slider along the slider track, thereby controlling the position of the second end of the crushing jaw.

2. The crusher according to claim 1, wherein, The slider track is positioned at an angle relative to the vertical.

3. The crusher according to claim 1, wherein, The drive unit is a hydraulic cylinder having an extendable cylinder rod connected to the slider.

4. The crusher according to claim 1, wherein, The second end of the connecting arm can be rotatably connected to the slider.

5. The crusher according to claim 1, wherein, The first end of the connecting arm can be rotatably connected to the second end of the crushing jaw.

6. The crusher according to claim 1, wherein, The connecting arm extends below the drive shaft of the crushing roller.

7. The crusher according to claim 1, wherein, The first end and the second end of the connecting arm are located on opposite sides of the vertical centerline of the crushing roller.

8. The crusher according to claim 1, wherein, The angle of the slider track is approximately perpendicular to the crushing force generated in the crushing gap.

9. The crusher according to claim 1, wherein, In the event of an overload in the crushing gap, the connecting arm moves the slider to allow the second end of the crushing jaw to move.

10. A compact eccentric crusher for crushing fed mineral materials, the crusher comprising: A crusher frame that at least partially defines a crushing chamber; A crushing roller, mounted to a drive shaft, is used for eccentric movement within the crushing chamber; A jaw crusher has a first end and a second end, wherein the first end is pivotally mounted such that the second end can move into and out of the crushing chamber to adjust the crushing gap between the jaw crusher and the crushing roller; a pair of jaw crusher adjustment assemblies operable to control the movement of the second end of the jaw crusher, each jaw crusher adjustment assembly including: a connecting arm having a first end and a second end, wherein the first end is connected to the second end of the jaw crusher; a slider mounted to move longitudinally along a slider track, wherein the second end of the connecting arm is connected to the slider; and a drive unit operable to move the slider along the slider track, thereby controlling the position of the second end of the jaw crusher.

11. The crusher according to claim 10, wherein, The slider track is positioned at an angle relative to the vertical.

12. The crusher according to claim 10, wherein, The drive unit is a hydraulic cylinder having an extendable cylinder rod connected to the slider.

13. The crusher according to claim 10, wherein, The first end of the connecting arm can be rotatably connected to the second end of the crushing jaw.

14. The crusher according to claim 10, wherein, The first end and the second end of the connecting arm are located on opposite sides of the vertical centerline of the crushing roller.

15. The crusher according to claim 10, wherein, In the event of an overload in the crushing gap, the connecting arm moves the slider to allow the second end of the crushing jaw to move.

16. An adjustment assembly for use with a crusher, the crusher being operable to crush a supplied mineral material and having a crushing roller and a crushing jaw, the crushing roller being mounted to a drive shaft for rotation within a crushing chamber, the crushing jaw having a first end and a second end, wherein, The first end is pivotally mounted, allowing the second end to move in and out of the crushing chamber to adjust the crushing gap between the crushing jaw and the crushing roller. The adjustment assembly includes: a pair of crushing jaw adjustment assemblies positioned on a first side and a second side of the crusher, operable to control the movement of the second end of the crushing jaw. Each crushing jaw adjustment assembly includes: a connecting arm having a first end and a second end, wherein the first end is connected to the second end of the crushing jaw; a slider mounted to move longitudinally along a slider track, wherein the second end of the connecting arm is connected to the slider; and a drive unit operable to move the slider along the slider track, thereby controlling the position of the second end of the crushing jaw.

17. The adjustment assembly according to claim 16, wherein, The slider track is positioned at an angle relative to the vertical.

18. The adjustment assembly according to claim 17, wherein, The drive unit is a hydraulic cylinder having an extendable cylinder rod connected to the slider.

19. The adjustment assembly according to claim 18, wherein, The first end of the connecting arm can be rotatably connected to the second end of the crushing jaw.

20. The adjustment assembly according to claim 16, wherein, In the event of an overload in the crushing gap, the connecting arm moves the slider to allow movement of the second end of the crushing jaw.

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