JP2017113737A - Gyratory crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage of a fixing structure of a mantle and damage of the mantle itself by mitigating restriction of elongation to the vertical direction of the mantle during a crush operation.SOLUTION: A gyratory crusher includes: a cone cave provided inside a frame; a mantle core 5 arranged rotatably inside the cone cave, and having a truncated conical face-shaped outer peripheral surface; a mantle 6 mounted on the outer peripheral surface of the mantle core 5, and having a truncated conical face-shaped outer peripheral surface; and a mantle fixing mechanism 40 for fixing the mantle 6 to the mantle core 5. The mantle fixing mechanism 40 is arranged on the furthermore lower side than a crushing chamber 8 formed between the cone cave and the mantle 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotary crusher such as a gyratory crusher or a cone crusher that crushes rocks and the like.

  Conventionally, as a crusher for crushing a large raw stone (rock), a rotary crusher such as a gyratory crusher or a cone crusher has been used (for example, Patent Document 1).

  An outline and a crushing principle of a conventional crushing crusher will be described with reference to FIG. 1A using a cone crusher as an example.

  1A shows a conventional crushing crusher having a central axis formed in a central portion of an internal space formed by an upper frame 1 having a truncated inverted conical tube shape and a lower frame 2 connected thereto. A main shaft 3 is provided so as to be inclined with respect to the central axis. The lower portion of the main shaft 3 is rotatably inserted into the eccentric sleeve 4, and the lower end is supported by a thrust bearing or the like.

  A mantle door 5 whose outer peripheral surface forms a frustoconical surface is firmly attached to the outer surface of the main shaft 3 by shrink fitting. A mantle 6 made of an abrasion resistant material (for example, high manganese cast steel) and having an outer peripheral surface forming a frustoconical surface is attached to the outer surface of the mantle door 5.

  Further, the inner surface of the upper frame 1 is provided with a cone cave 7 made of a wear-resistant material (for example, high manganese cast steel). A crushing chamber 8 is formed by a space formed by the cone cave 7 and the mantle 6 and having a wedge-shaped vertical cross section.

  The central axis of the main shaft 3 and the central axis of the upper frame 1 intersect in the upper space of the crusher, and the main shaft 3 is a plane formed by the central axis of the main shaft 3 and the central axis of the upper frame 1. It has an inclination with respect to the upper frame 1. When the main shaft 3 rotates due to the inclination between the two central axes, the main shaft 3 performs an eccentric swiveling motion, that is, a so-called precession, with respect to the upper frame 1, and the horizontal position at an arbitrary position on the central axis of the upper frame 1. In the cross section, the distance between the mantle 6 and the corn cave 7 changes periodically. Note that the change cycle of the distance is the same as the rotation cycle of the main shaft 3.

  A rock to be crushed (hereinafter referred to as “object to be crushed”) is input from above the crusher and falls into the crushing chamber 8. In the crushing chamber 8, the distance between the cone cave 7 and the mantle 6 becomes narrower downward, and the distance changes periodically with the rotation of the main shaft 3. Crushing progresses while repeating, and is recovered from below as a crushed product from the bottom of the crushing chamber where the distance between the corn cave 7 and the mantle 6 is the narrowest.

  In such a cone crusher, a strong reaction force (load) accompanying crushing acts on the mantle 6 as a pressing force toward the central axis and a turning force in the circumferential direction.

  With respect to such a load, the conventional structure of the rotary crusher employs the following structure for fixing the mantle 6 to the mantle door 5 or the main shaft 3.

  That is, as shown in FIG. 1B, the mantle 6 is formed by a fastening portion 10 formed by screwing a male screw formed on the upper end of the main shaft 3 to a female screw formed on the inner peripheral surface of the fastening bracket 9. A screw groove is formed so that the screw is fixed to be pressed against a mantle door 5 that is firmly connected to the main shaft 3 by shrink fitting, and the screw is tightened (automatic tightening) when the mantle 6 is rotated by a turning force. The inner peripheral surface of the mantle 6 and the outer peripheral surface of the mantle door 5 are engaged with each other by forming a truncated conical surface. For this reason, the mantle 6 is deformed by the reaction force accompanying crushing and tends to extend up and down, but its upward extension is restricted and its downward extension is also restricted.

  As described above, the mantle tends to extend in the direction indicated by the arrow 11 in FIG. 1B due to the pressing force during the crushing operation. However, since the vertical extension is constrained by the fixing or supporting structure, there is a problem that the threaded portion is damaged or the mantle 6 itself is damaged (cracked) due to internal stress. It was.

JP 2012-240014 A

  The present invention has been made in view of the above-described problems of the prior art, and relaxes the restraint of the vertical extension of the mantle during crushing operation, thereby preventing damage to the mantle fixing structure and the mantle itself. An object of the present invention is to provide a rotary crusher that can be used.

  In order to solve the above-mentioned problem, a rotary crusher according to a first aspect of the present invention is provided with a cone cave provided inside a frame, and is rotatably arranged inside the cone cave, and has a truncated conical surface shape. A mantle door having an outer peripheral surface, a mantle attached to the outer peripheral surface of the mantle door and having a frustoconical outer peripheral surface, and a mantle fixing mechanism for fixing the mantle to the mantle door. The mantle fixing mechanism is arranged below the crushing chamber formed between the cone cave and the mantle.

  According to a second aspect of the present invention, in the first aspect, the mantle fixing mechanism includes an annular member provided on a lower outer peripheral portion of the mantle door and a circumferentially arranged 2 on a lower outer peripheral portion of the mantle. Two or more protrusions, and the annular member and the protrusions are connected by a connecting member.

  According to a third aspect of the present invention, in the second aspect, a male screw is formed on the lower outer peripheral portion of the mantle door, and a female screw to be screwed with the male screw is formed on the inner peripheral surface of the annular member. It is characterized by that.

  According to a fourth aspect of the present invention, in the third aspect, the male screw and the female screw are formed such that the annular member advances downward when the mantle rotates in a direction to receive a turning force due to crushing. It is characterized by that.

  According to a fifth aspect of the present invention, in the first or second aspect, two or more mantle door side inclined surfaces are formed in a circumferential direction on a bottom surface of the lower outer peripheral portion of the mantle door, and the annular An annular member-side inclined surface that engages with the two or more mantle door-side inclined surfaces is formed on the upper surface of the inner peripheral portion of the member.

  According to a sixth aspect of the present invention, in the fifth aspect, when the inclination direction of the annular member-side inclined surface and the mantle door-side inclined surface rotates in a direction in which the mantle receives a turning force due to crushing, The member is formed to operate in a direction in which the member is pushed downward.

  According to a seventh aspect of the present invention, in any one of the second to fourth aspects, the lower outer peripheral portion of the mantle door is formed with a mantle door side through hole penetrating vertically, and the two or more The projection of the flat plate-shaped projection has a mantle-side through hole that penetrates in the horizontal direction, and the mantle-side through hole is formed in the mantle door. An upper surface disposed above the bottom surface of the lower outer peripheral portion, and a bottom surface disposed below the bottom surface of the lower outer peripheral portion of the mantle door and inclined toward the central axis direction of the mantle. The mantle is inserted into the mantle-side through hole by inserting a block-like connecting member having a bottom surface on which an inclined surface substantially the same as the bottom surface of the mantle-side through hole is formed. And it is configured to secure to, characterized in that.

  According to an eighth aspect of the present invention, in the seventh aspect, the mantle door has an inclined bottom surface that is slanted in a circumferential direction on an outer peripheral side of the mantle door side through hole, and the block-shaped connecting member is It has an inclined upper surface that engages with the inclined bottom surface.

  According to a ninth aspect of the present invention, in the eighth aspect, when the inclined direction of the inclined upper surface and the inclined bottom surface is rotated in a direction in which the mantle receives a turning force due to crushing, the block-shaped connecting member is moved downward. It is formed to operate in a direction in which it is pushed down.

  ADVANTAGE OF THE INVENTION According to this invention, the restriction | limiting of the extension to the up-down direction of the mantle at the time of a crushing operation | movement can be eased, and the damage of the fixed structure of a mantle and the damage of the mantle itself can be prevented.

The longitudinal cross-sectional view which shows the structure of the conventional cone crusher. The longitudinal cross-sectional view which expands and shows a part of structure of the conventional cone crusher. The longitudinal cross-sectional view which shows the structure of the mantle fixing mechanism of the rotary crusher by 1st embodiment of this invention. The perspective view which shows the relationship of the main components of the rotary crusher by 1st embodiment of this invention. The longitudinal cross-sectional view which shows the structure of the mantle fixing mechanism of the rotary crusher by 2nd embodiment of this invention. The perspective view which shows the relationship of the main components of the rotary crusher by 2nd embodiment of this invention. The longitudinal cross-sectional view which shows the structure of the mantle fixing mechanism of the rotary crusher by 3rd embodiment of this invention. The perspective view from diagonally downward which shows the relationship of the main components of the rotary crusher by 3rd embodiment of this invention. The perspective view from diagonally upward which shows the relationship of the main components of the rotary crusher by 3rd embodiment of this invention. The longitudinal cross-sectional view which shows the structure of the mantle fixing mechanism of the rotation type crusher by 4th embodiment of this invention. FIG. 8B is a left side view of a part of the mantle fixing mechanism shown in FIG. 8A. The perspective view which shows the relationship of the main components of the rotary crusher by 4th embodiment of this invention. The longitudinal cross-sectional view which shows the structure of the mantle fixing mechanism of the rotation type crusher by 5th embodiment of this invention. The perspective view which shows the relationship of the main components of the rotary crusher by the 5th embodiment of this invention.

  Hereinafter, a rotary crusher according to various embodiments of the present invention will be described with reference to the drawings, taking a cone crusher as an example.

  In addition, the application object of this invention is not limited to a cone crusher, It is applicable to the general rotary crusher including a gyratory crusher etc.

<First embodiment>
A first embodiment of the present invention will be described with reference to FIGS. 2 and 3. In FIG. 3, the structure of the upper part of the mantle or the main shaft, the lower part of the main shaft, and the like are omitted (the same applies to the perspective views of FIGS. 5, 7A, 7B, 9, and 11 described later).

  The mantle fixing mechanism 40 of the rotary crusher according to the present embodiment is a mechanism for fixing the mantle 6 to the mantle door 5. This mantle fixing mechanism 40 is located below the lowermost part of the crushing chamber and is disposed in a region not involved in crushing the object to be crushed, a part of the mantle 6, a part of the mantle door 5, and other members. It is comprised including.

  Four projections 81a are formed at equal intervals in the circumferential direction on the outer peripheral portion of the lower end of the mantle 6, and a female screw 52a is provided at a substantially central portion of the projection 81a. The female screw 52a can be manufactured by tapping a protrusion 81a that is manufactured integrally with the mantle 6, but since the mantle 6 is manufactured of high manganese cast steel that is a wear-resistant material, a substantially central portion of the protrusion 81a. It is preferable to drill a hole in the steel block, insert an iron block, and thread the iron block.

  A male screw 91a is formed on the outer periphery of the lower end of the mantle door 5 over the entire circumference. On the outer peripheral side of the male screw 91a of the mantle door 5, an annular member 80a having a female screw 92a screwed with the male screw 91a is disposed. The annular member 80a is attached to the mantle door 5 by engaging the male screw 91a and the female screw 92a.

  The male screw 91a and the female screw 92a are formed such that when the annular member 80a rotates in a direction in which the mantle 6 receives a turning force due to crushing, the annular member 80a advances downward. Thereby, the inner surface of the mantle 6 is more strongly pressed against the outer surface of the mantle door 5 and the fixing function is improved (automatic tightening mechanism).

  Through-holes 82a are formed in the annular member 80a at positions corresponding to the protrusions 81a of the mantle 6 (four locations arranged at equal intervals in the circumferential direction). The mantle 6 is fixed to the mantle door 5 by inserting the bolt 51a into the through hole 82a from below the annular member 80a, and engaging and tightening the female screw 52a formed on the projection 81a of the mantle 6.

  Note that the inner peripheral surface of the mantle 6 and the outer peripheral surface of the mantle door 5 both form a truncated conical surface having substantially the same shape. Since the inner peripheral surface is engaged with the outer peripheral surface of the mantle door 5 and the mantle 6 is pressed against the mantle door 5 with the bolt 51a, the bolt 51a needs to be fixed at least two places. That is, it is sufficient to arrange at least two protrusions 81a on the lower outer peripheral portion of the mantle 6 in the circumferential direction. However, in order to specify a plane, considering that geometrically three points are necessary, it is preferable to have three or more points in order to improve the fixing ability. On the other hand, if the number of connecting portions by the bolts 51a and the protrusions is large, labor and cost required for production, processing, and repair increase. For this reason, the number of connecting portions is preferably 3 to 4 and 8 or less.

  As described above, in the cone crusher according to the present embodiment, the mantle 6 is fixed to the mantle door 5 at the lower portion thereof, and is not particularly fixed at the upper portion of the mantle 6, so there is no restriction in the vertical direction.

  Therefore, even when the mantle 6 extends in the surface direction due to an impact during the crushing operation, the mantle 6 can freely escape upwardly without being constrained. For this reason, the bolt 51a for fixing is not damaged, and the mantle 6 itself is not damaged by the internal stress.

  In addition, since the mantle fixing mechanism 40 is disposed below the lowermost part of the crushing chamber not involved in crushing, wear or the like due to direct receiving of a load accompanying crushing does not occur.

  In addition, since a support and fixing mechanism for the mantle 6 is unnecessary in the upper part of the mantle 6 or the main shaft 3, the upper structure can be simplified, and the size of the crusher can be reduced.

  In addition, since the mantle fixing mechanism 40 is disposed below the crushing chamber 8, the mantle fixing mechanism 40 is not damaged by the introduction or dropping of rocks, and is not directly damaged by crushing. The life of the mantle fixing mechanism 40 is greatly improved.

<Second Embodiment>
Next, a rotary crusher according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. In the following description, items different from those of the first embodiment will be mainly described, and items not particularly described are the same as those of the first embodiment unless there is a contradiction or the like.

  Four protrusions 81b are arranged on the outer periphery of the lower end of the mantle 6 at equal intervals in the circumferential direction. A through hole 83b through which a hexagon socket head bolt 51b passes is formed in the head substantially at the center of the protrusion 81b, and the head of the bolt 51b is fitted into the top of the protrusion 81b. A recess 95b having a depth substantially the same as the height is formed.

  A male screw 91 b is formed on the outer periphery of the lower end of the mantle door 5 over the entire circumference. On the outer peripheral side of the male screw 91b of the mantle door 5, an annular member 80b formed with a female screw 92b that is screwed into the male screw 91b is disposed. The annular member 80b is attached to the mantle door 5 by meshing the male screw 91b and the female screw 92b.

  The male screw 91b and the female screw 92b have an automatic tightening mechanism in which the screw is machined in a direction in which the screw is tightened when the mantle 6 rotates in a direction to receive a turning force by crushing, as in the first embodiment. It is the same.

  In the annular member 80b, through holes 82b are formed at positions corresponding to the through holes 83b of the projections 81b of the mantle 6 (four places arranged at equal intervals in the circumferential direction).

  The mantle 6 is fixed to the mantle door 5 by inserting the bolt 51b into the through hole 83b and the through hole 82b from above the protrusion 81b of the mantle 6 and screwing and tightening the nut 52b disposed below the annular member 80b. Is done.

  In the second embodiment, in the bolt fastening for connecting the mantle 6 and the mantle door 5, the first embodiment is threaded into the protrusion 81a integrated with the mantle 6. When the internal thread for bolt fastening is provided on the nut 52b, which is a member independent of the mantle 6 and the like, the mantle 6 which is difficult to process does not need to be threaded, and the manufacturing cost can be reduced and the threaded portion is fixed. However, since only the replacement and disposal of the bolt 51b and the nut 52b are sufficient, the mantle 6 and the like need not be processed, repaired, or replaced.

  In the second embodiment, the vertical position of the upper surface of the protrusion 81b formed on the mantle 6 is the same as the vertical position of the upper surface of the protrusion 81a formed on the mantle 6 in the first embodiment. Compared to the first embodiment, the height of the protrusion 81b is increased by the height of the head of the bolt 51b, and the height of the annular member 80b is decreased.

  Further, the number of connecting portions (also the number of protrusions 81b) by the bolts 51b and nuts 52b is the same as in the first embodiment, and is preferably 3 to 4 and 8 or less.

  Also in the second embodiment, the mantle 6 is fixed to the mantle door 5 at the lower part thereof, and the upper part of the mantle 6 is not particularly fixed, so there is no restriction in the vertical direction.

  Therefore, similarly to the first embodiment, the mantle 6 can freely escape upward without being constrained, so that the bolts 51b and the like for fixing are not damaged, and the mantle 6 is caused by internal stress. It will not cause any damage.

<Third embodiment>
Next, a rotary crusher according to a third embodiment of the present invention will be described with reference to FIGS. 6, 7A and 7B. In the following description, differences from the first or second embodiment will be mainly described, and items that are not particularly described are the same as those in the first or second embodiment unless there is a contradiction or the like.

  Four protrusions 81c are arranged at equal intervals in the circumferential direction on the outer periphery of the lower end of the mantle 6, and a through hole 83c through which a bolt 51c with a hexagonal hole penetrates the head at a substantially central portion of the protrusion 81c. In addition, the head of the bolt 51c is fitted into the upper portion of the protrusion 81c, and a recess 95c having a depth substantially the same as the head height is formed.

  A plurality of inclined surfaces 53 that are inclined in the circumferential direction are formed on the outer peripheral portion of the bottom surface of the mantle door 5 at equal intervals in the circumferential direction. An annular member 80c having a through hole 82c is disposed on the lower side of the outer periphery of the mantle door 5. An inclined surface 54 having a shape corresponding to the inclined surface 53 is formed on the upper surface of the inner peripheral portion of the annular member 80 c at a position corresponding to the inclined surface 53 formed on the outer peripheral surface of the bottom surface of the mantle door 5.

  The mantle 6 engages the inclined surface 54 of the upper surface of the inner peripheral portion of the annular member 80c with the inclined surface 53 of the outer peripheral portion of the bottom surface of the mantle door 5 from below, and the bolt 51c is inserted into the through hole 83c and the through hole 82c, 81c and the annular member 80c are fastened to the mantle door 5 by fastening them with bolts 51c and nuts 52c.

  When the annular member 80c receives a turning force due to the turning force that the mantle 6 receives by crushing, the inclined surface 54 formed in the fixed-side annular member 80c is formed in the fixed-side mantle door 5. Inclination angle directions of the inclined surface 53 and the inclined surface 54 are determined in a direction that bites into the inclined surface 53 and the fixation of the mantle is strengthened. Thereby, automatic fastening is realized.

  The number of the inclined surfaces 53 and 54 may not be the same, and the number of the inclined surfaces on one side (for example, the mantle door 5 side) may be an integral multiple of the number of the inclined surfaces on the other side (for example, the annular member 80c side). It is.

  In this embodiment, when the inclined surfaces 53 and 54 are worn, for example, the annular member 80c is replaced with a new one, and the inclined surface 54 of the new annular member 80c is replaced with the inclined surface 53 where the mantle door 5 is not worn. The operation can be resumed by engaging with. As a result, the frequency of repair or replacement of the mantle door 5 (inclined surface 53) that is difficult to repair or replace is greatly reduced.

  Also in the third embodiment, the mantle 6 is fixed to the mantle door 5 at the lower portion thereof, and is not particularly fixed at the upper portion of the mantle 6, so there is no restriction in the vertical direction.

  Accordingly, since the mantle 6 can freely escape upward without being restrained, the fixing bolt 51c and the like are not damaged, and the mantle 6 itself is not damaged by the internal stress. .

<Fourth embodiment>
Next, a rotary crusher according to a fourth embodiment of the present invention will be described with reference to FIGS. 8A, 8B, and 9. FIG. In the following, items different from those in the first to third embodiments will be mainly described, and items not particularly described are the same as those in the first to third embodiments unless there is a contradiction or the like.

  On the lower surface of the outer periphery of the mantle 6, substantially flat projections 81d that are directed vertically downward are arranged at four locations at equal intervals in the circumferential direction, and a cotter 70 is inserted into the projection 81d and engaged through hole 83d. Is formed. The shape of the protrusion 81d is not limited to a flat plate shape, and may be a prismatic shape or a cylindrical shape.

  On the outer periphery of the lower part of the mantle door 5, four through holes 82d through which the projections 81d of the mantle 6 pass are formed at positions corresponding to the projections 81d in the circumferential direction.

  The through-hole 83d of the projection 81d of the mantle 6 is formed with an inclined surface 71 that is inclined vertically upward with respect to the direction toward the central axis of the mantle door 5 at the bottom surface.

  The cotter 70 is formed with an inclined surface 72 having substantially the same inclination as the inclined surface 71 of the through hole 83d of the protrusion 81d on the bottom surface thereof. By pushing the cotter 70 into the through hole 83d of the protrusion 81d from the outer peripheral side, the inclined surface 72 of the cotter 70 is engaged with the inclined surface 71 of the through hole 83d of the protrusion 81d, and the upper surface of the cotter 70 is engaged with the bottom surface of the mantle door 5. To do. At this time, due to the action (wedge action) of the inclined surfaces 71 and 72, the mantle 6 is pushed down vertically, the inner peripheral surface of the mantle 6 is pressed against the outer peripheral surface of the mantle door 5, and the mantle 6 is against the mantle door 5. Connected.

  In order for the wedge action to function effectively, when the mantle 6 is connected to the mantle door 5, the cotter 70 is interposed between the upper surface of the through hole 83d of the projection 81d of the mantle 6 and the upper surface of the cotter 70. An air gap having a margin is provided for pushing into the protrusion 81d. That is, since the upper surface of the cotter 70 is engaged with the bottom surface of the mantle door 5, the ceiling surface of the through hole 83 d of the protrusion 81 d is set upward with a sufficient distance from the bottom surface of the mantle door 5. Has been.

  In addition, an inclined surface 76 that is inclined in the circumferential direction is formed on the bottom surface of the outer peripheral portion of the through hole 82 d in the mantle door 5, and the upper surface of the cotter 70 located below the inclined surface 76 is engaged with the inclined surface 76. An inclined surface 77 is formed so as to be inclined. The inclination direction of the inclined surfaces 76 and 77 is set to a direction in which the inclined surface 77 on the cotter 70 side pushes the inclined surface 76 on the Manteller side when the mantle 6 receives a turning load due to crushing. With this configuration, when the cotter 70 receives the turning load received by the mantle 6 through the protrusion 81 and pushes the inclined surface 77 into the inclined surface 76, the bottom surface of the cotter 70 and the through hole 83d of the protrusion 70 are caused by the wedge effect. As a result, the inner peripheral surface of the mantle 6 is further pressed against the outer peripheral surface of the mantle door 5 and the fixing is strengthened. That is, automatic tightening is realized.

  In addition, about the number of the connection parts by the protrusion 81b and the cotter 70, it is the same as that of 1st embodiment, and 3 thru | or 4 or more and 8 or less are preferable.

  Also in the fourth embodiment, the mantle 6 is fixed to the mantle door 5 at the lower portion thereof, and is not particularly fixed at the upper portion of the mantle, so there is no restriction in the vertical direction.

  Accordingly, since the mantle 6 can freely escape upward without being constrained, the cotter 70 for fixing is not damaged, and the mantle 6 itself is not damaged by internal stress. .

<Fifth embodiment>
Next, a rotary crusher according to a fifth embodiment of the present invention will be described with reference to FIGS. In the following description, differences from the first to fourth embodiments will be mainly described. Items that are not particularly described are the same as those in the first to fourth embodiments unless there is a contradiction.

  On the outer peripheral portion of the lower end of the mantle 6, projections 81e heading vertically downward are arranged at four locations at equal intervals in the circumferential direction, and through holes 83e into which the cotters 73 are inserted and engaged are formed in the projections 81e. .

  A male screw 91e is formed on the outer periphery of the lower end of the mantle door 5 over the entire circumference. On the outer peripheral side of the male screw 91e of the mantle door 5, an annular member 80e in which a female screw 92e that meshes with the male screw 91e is formed. The annular member 80e is attached to the mantle door 5 by meshing the male screw 91a and the female screw 92a.

  As in the first embodiment, the male screw 91e and the female screw 92e have an automatic tightening mechanism in which a screw groove is formed in a direction in which the screw is tightened when the mantle 6 rotates in a direction to receive a turning force by crushing. It is.

  A through hole 82e through which the protrusion 81e passes is formed in the annular member 80e at a position corresponding to the protrusion 81e of the mantle 6. In the through hole 83e of the projection 81e of the mantle 6, an inclined surface 74 whose bottom surface is inclined vertically upward with respect to the direction toward the central axis of the mantle door 5 is formed.

  The cotter 73 is formed with an inclined surface 75 whose bottom surface has substantially the same inclination as the inclined surface 74 of the through hole 83e of the protrusion 81e, and the cotter 73 is pushed into the through hole 82e of the protrusion from its outer peripheral side. The inclined surface 75 of the cotter 73 is engaged with the inclined surface 74 of the through hole 83e of the protrusion 81e, and the upper surface of the cotter 73 is engaged with the bottom surface of the mantle door 5.

  At this time, the mantle 6 is pushed vertically downward by the action of the inclined surface 74 and the inclined surface 75 (wedge action), and the inner surface of the mantle 6 is pressed against the outer surface of the mantle door 5 so that the mantle 6 5 is connected.

  In the state where the mantle 6 is connected to the mantle door 5, there is a margin between the upper surface of the through hole 83e of the projection 81e of the mantle 6 and the upper surface of the cotter 73 in order to push the cotter 73 into the projection 81e. Voids are provided.

  Further, the number of connecting portions formed by the protrusions 81e and the cotters 73 is the same as in the first embodiment, and is preferably 3 to 4 and 8 or less.

  Also in the fifth embodiment, the mantle 6 is fixed to the mantle door 5 at the lower portion thereof, and is not particularly fixed at the upper portion of the mantle 6, so there is no restriction in the vertical direction.

  Accordingly, since the mantle 6 can freely escape upward without being constrained, the cotter 73 for fixing is not damaged, and the mantle 6 itself is not damaged by internal stress. .

  As mentioned above, although the rotary crusher by various embodiment of this invention was demonstrated, the number, arrangement | positioning, etc. of a protrusion, a volt | bolt, and a cotter are not restricted to the above-mentioned embodiment, For example, it can set by changing suitably.

DESCRIPTION OF SYMBOLS 1 Upper frame 2 Lower frame 4 Eccentric sleeve 5 Mantle door 6 Mantle 7 Cone cave 8 Crushing chamber 3 Main shaft 40 Mantle fixing mechanism 51a, b, c Bolt 52b, c Nut 53 Inclined surface 54 Inclined surface 70 Cotter 71 Inclined surface 72 Inclined surface 73 Cotter 74 Inclined surface 75 Inclined surface 76 Inclined surface 77 Inclined surfaces 80a, b, c, e Annular members 81a, b, c, d, e Protrusions 82a, b, c, d Through holes 83b, c, d Through holes 91a, b, c, e Male thread 92a, b, c, e Female thread 95b, c Recess

Claims (9)

Corn cave provided inside the frame,
A mantle door that is rotatably arranged inside the cone cave and has a frustoconical outer peripheral surface,
A mantle mounted on the outer peripheral surface of the mantle door, and having a frustoconical outer peripheral surface;
A mantle fixing mechanism for fixing the mantle to the mantle door,
The mantle fixing mechanism is a rotary crusher disposed below a crushing chamber formed between the cone cave and the mantle.   The mantle fixing mechanism includes an annular member provided on a lower outer peripheral portion of the mantle door, and two or more protrusions arranged in a circumferential direction on a lower outer peripheral portion of the mantle, and the annular member and the The rotary crusher according to claim 1, wherein the crusher is configured to connect the protrusion with a connecting member. The rotary crusher according to claim 2, wherein a male screw is formed on the lower outer peripheral portion of the mantle door, and a female screw that is screwed with the male screw is formed on an inner peripheral surface of the annular member.   The rotary crusher according to claim 3, wherein the male screw and the female screw are formed so that the annular member advances downward when the mantle rotates in a direction to receive a turning force caused by crushing. Two or more mantle door side inclined surfaces are formed in the circumferential direction on the bottom surface of the lower outer peripheral portion of the mantle door,
The rotatory crusher according to claim 1 or 2, wherein an annular member-side inclined surface that engages with the two or more mantle door-side inclined surfaces is formed on an upper surface of an inner peripheral portion of the annular member.   The inclined direction of the annular member-side inclined surface and the mantle door-side inclined surface is formed to operate in a direction in which the annular member is pushed downward when the mantle rotates in a direction to receive a turning force due to crushing. The rotary crusher according to claim 5. In the lower outer peripheral portion of the mantle door, a mantle door side through hole penetrating vertically is formed,
The two or more protrusions pass through the mantle-side through hole and extend below the mantle-side through hole, the protrusion has a mantle-side through hole that penetrates in a horizontal direction, and the mantle-side through hole is the mantle An upper surface disposed above the bottom surface of the lower outer peripheral portion of the core, a bottom surface disposed below the bottom surface of the lower outer peripheral portion of the mantle door, and inclined toward the central axis direction of the mantle; Have
The mantle is fixed to the mantle door by inserting a block-shaped connecting member having a bottom surface formed with an inclined surface substantially the same as the bottom surface of the mantle side through hole into the mantle side through hole. The rotary crusher according to any one of claims 2 to 4, which is configured. The mantle door has an inclined bottom surface that is inclined in the circumferential direction on the outer peripheral side of the mantle door side through hole,
The rotary crusher according to claim 7, wherein the block-shaped connecting member has an inclined upper surface that engages with the inclined bottom surface.   The inclined direction of the inclined upper surface and the inclined bottom surface is formed to operate in a direction in which the block-shaped connecting member is pushed downward when the mantle rotates in a direction to receive a turning force due to crushing. Item 9. The rotary crusher according to Item 8.

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