Jaw crusher and crushing plant
10682651 ยท 2020-06-16
Assignee
Inventors
Cpc classification
B02C1/043
PERFORMING OPERATIONS; TRANSPORTING
B02C23/08
PERFORMING OPERATIONS; TRANSPORTING
International classification
B02C23/08
PERFORMING OPERATIONS; TRANSPORTING
Abstract
A jaw crusher has frame side walls, a rear end connected to the side walls, an eccentric supported by the side walls, a pitman supported by the eccentric, a toggle plate connected between the pitman and a middle section of the rear end including a cross wall. The rear end has a rear end support connected to the cross wall and located on a center plane of the cross section of the rear end. An upper and lower rear cross beams are fixed to the side walls. The upper and lower rear cross beams each have a vertical wall and horizontal ribs connected to the vertical wall. A crushing plant is also disclosed with a body and the jaw crusher mounted on the body.
Claims
1. A jaw crusher comprising: frame side walls; a rear end connected to the frame side walls; an eccentric supported by the frame side walls; a pitman supported by the eccentric; a toggle plate connected between the pitman and a first section of the rear end, the first section including a cross wall of the rear end, the toggle plate comprising a rear edge; the rear end consisting of the first section and a second section, the first section defining a space for receiving the rear edge of the toggle plate; wherein the second section of the rear end consists of a rear portion of the rear end that resides behind a rear surface of the cross wall, wherein the rear portion consists of a single rear end support connected to the cross wall and located on and extending along a center plane of the cross section of the rear end for minimizing deflection of the cross wall, the single rear end support being formed as a single beam which is integrated to the cross wall and extends perpendicular to the cross wall, wherein the single beam is located on and extends along the center plane.
2. The crusher according to claim 1, wherein the rear end support is configured to receive a crushing force transmitted by the toggle plate towards a first side of the cross wall directly on a second side opposite of the first side of the cross wall.
3. The crusher according to claim 1, wherein the rear end support extends along the width of the rear end cross wall from a first side wall of the frame side walls to a second side wall of the frame side walls.
4. The crusher according to claim 1, wherein the eccentric is arranged to move the pitman reciprocatively.
5. The crusher according to claim 1, wherein the rear end support has a rectangular cross section that equals substantially a rectangle having a length substantially in the longitudinal direction of the crusher and a thickness perpendicular to the length, wherein said length is larger than said thickness.
6. The crusher according to claim 5, wherein a ratio of the thickness to the length of the rectangular cross section of the rear end support is between 1:6 and 1:2.
7. The crusher according to claim 5, wherein a ratio of the thickness to the length of the rectangular cross section of the rear end support is 1:6.
8. The crusher according to claim 1, wherein: the crusher comprises one or more return rods and a return rod support beam including one or more return rod support openings, the return rod support beam is integrated to the rear end, and the return rod support beam extends from a first sidewall of the frame side walls to a second sidewall of the frame side walls.
9. The crusher according to claim 1, wherein: the crusher comprises one or more return rods and return rod supports including one or more return rod support openings, and the one or more return rod supports being integrated to the rear end.
10. The jaw crusher of claim 1, further comprising: an upper rear cross beam fixed to the side walls, the upper rear cross beam comprising a vertical wall and horizontal ribs connected to said vertical wall; and a lower rear cross beam fixed to the frame side walls, the lower rear cross beam comprising a second vertical wall and second horizontal ribs connected to said second vertical wall.
11. The crusher according to claim 10, wherein the horizontal ribs of the upper and lower cross beams are directed away from the crusher.
12. A crushing plant comprising: a body; a jaw crusher, wherein the jaw crusher is mounted on the body and the jaw crusher comprises: jaw crusher side walls; a rear end connected to the jaw crusher side walls; an eccentric supported by the jaw crusher side walls; a pitman supported by the eccentric; a toggle plate connected between the pitman and a first section of the rear end comprising a cross wall, wherein the toggle plate includes a rear edge, the rear end consists of the first section and a second section, the first section defines a space for receiving the rear edge of the toggle plate, wherein the second section consists of a rear portion of the rear end that resides behind a rear surface of the cross wall and the end portion consists of a single rear end support connected to the cross wall and located on and extending along a center plane of the cross section of the rear end for minimizing deflection of the cross wall; and the single rear end support is formed as a single beam integrated to the cross wall and extending perpendicular to the cross wall, wherein the single beam is located on and extending along the center plane.
13. The crushing plant according to claim 12, wherein the crushing plant is a movable processing plant comprising a feeder, a screen, and a conveyor mounted on the body.
14. The crushing plant according to claim 12, wherein the rear end support is configured to receive a crushing force transmitted by the toggle plate towards a first side of the cross wall directly opposite a second side of the cross wall.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention will be described, by way of example, with reference to the accompanying schematical drawings, in which:
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DETAILED DESCRIPTION
(12) In the following description, like numbers denote like elements. It should be appreciated that the illustrated drawings are not entirely in scale, and that the drawings mainly serve the purpose of illustrating some example embodiments of the invention.
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(16) During operation of the crusher 10 the crushing force F is directed towards the cross wall 1 of the rear end 108, 108 and 108 (
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(20) The rear end 111 comprises a cross wall 1 (forming a middle section of the cross section), and first side walls 2 (forming a front section of the cross section) extending forwards in the direction of an arrow A from upper and lower ends of the cross wall 1. The first side walls are substantially perpendicular to the cross wall and forming a space therebetween for receiving the adjusting apparatus 110 for the toggle plate (for example a wedge adjusting apparatus 110) and the rear end of the toggle plate 104. The rear end 111 comprises a rear end support 13 (forming an end section of the cross section) extending backwards from the cross wall 1 to opposite direction relative to the receiving point of the toggle plate 104 and/or the adjusting apparatus 110 between the first side walls 2 and the receiving point of the crushing force F transmitted by the toggle plate.
(21) The rear end support 13 is located on a center plane 13 of the cross section of the rear end. The center plane 104 of the toggle plate 104 moves in a typical crushing operation on both sides of the center plane 13 of the rear end during one crushing cycle, e.g. one revolution of the eccentric 109. During one crushing cycle the center plane 104 of the toggle plate 104 is normally twice (may also be one time) parallel with the center plane 13 of the rear end 13. The angle of movement of the center plane 104 of the toggle plate 104 depends on the crushing application and the setting of the crusher, and the angle is the larger the smaller is the setting wherein the crushing force is the larger the smaller is the setting. Typically, in a center position of the angle of movement of the toggle plate the center plane 13 of the rear end 13 is directed substantially in the direction of the center plane 104 of the toggle plate 104 and thus in the direction of the crushing force F transmitted by the toggle plate. Preferably the front most point of the rear end support 13 is fixed to the cross wall 1 substantially centrally between the upper and lower ends of the cross wall.
(22) The crushing force F directed towards the cross wall 1 on the center plane 13 does not bend the cross wall 1 backwards between the first side walls 2 as described in connection with the prior art rear ends 108, 108, 108 because the rear end support 13 located on the force affecting route minimizes or prevents any deflection of the cross wall. Thus less strain energy is used than in connection with jaw crushers equipped with prior art rear ends.
(23) The rear end support 13 is formed as a beam which is integrated to the rear end, preferably during manufacturing by casting. The rear end support extends from a first side wall 103 to a second side wall 103 of the crusher frame.
(24) The rear end 111 preferably also comprises a return rod support 6 integrated to the rear end 111. The rear end 111 may support one, two, or more return rods 105. Regarding the illustrations of
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(29) According to an example the width of the crushing chamber between the fixed jaw 101 and the pitman 102 is about 1600 mm and the thickness of the side walls 103 is about 70 mm. The crushing force transmitted by the toggle plate 104 is about 10 000 kN. Thus the force is very high. The length of the rear end side wall 2 is about 450 mm, the length of the rear end support 13 is 550 mm, the thickness of the of the rear end support 13 is substantially about 110 mm and the dimension of the cross wall perpendicular to the length of the rear end support is about 450 mm.
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(31) The crushing plant 200 preferably also comprises a power source and a control centre 203. The power source may be for instance a diesel or electric motor, which provides energy to be used by process units and hydraulic circuits.
(32) The feeder 201, the crusher 100, the power source 203 and the conveyor 202 are attached to the body 204 of the crushing plant, which in this embodiment also comprises a track platform 205 for moving the crushing plant 200. The crushing plant may also be totally or partly wheel-based or movable by legs. Alternatively, it may be movable/towable for instance with help of a truck or some other exterior power source.
(33) Mineral material may be for instance quarried stone or it may be asphalt or decommissioning waste such as concrete, or brick etc. In addition to the foregoing, the crushing plant may be a fixed crushing plant.
(34) Embodiments of the jaw crusher 100 comprising a rear end 111 presented with help of any of
(35) The foregoing description provides non-limiting examples of some embodiments of the invention. It is clear to a person skilled in the art that the invention is not restricted to details presented, but that the invention can be implemented in other equivalent means. Some of the features of the above-disclosed embodiments may be used to advantage without the use of other features.
(36) As such, the foregoing description shall be considered as merely illustrative of principles of the invention, and not in limitation thereof. Hence, the scope of the invention is only restricted by the appended claims.