JP2005013876A - Gyratory crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gyratory crusher capable of easily performing an uneven wear correction work of cone cave in a short time. <P>SOLUTION: The gyratory crusher is constituted so that the upper end part of a main shaft 13 is supported on a spider 3b of the upper frame 3 by means of an upper part bearing 14. The gyratory crusher is provided with a thrust spherical bearing 15 disposed on the upper end surface of the main shaft and an oil pressure cylinder 16 for boosting which is retained vertically on the spider while being located on the upper side of the main shaft by a bracket 17 and lets a piston rod 16b to protrude downward so as to be able to pressurize the thrust spherical surface bearing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary crusher such as a gyratory crusher or a cone crusher.
[0002]
[Prior art]
Conventionally, this type of rotatory crusher can be separated by a large number (12 to 16) of bolts and nuts as connecting means in which a cylindrical upper frame is equally distributed on the outer periphery of a cylindrical lower frame. The upper end of the main shaft is connected to the upper frame spider and is supported by a hydraulic support provided on the boss of the lower frame so as to be movable up and down, and rotated by the rotational drive of an eccentric sleeve fitted to the lower end. A structure in which an annular crushing chamber narrowed downward is formed by a mantle attached to the main shaft by a top bearing such as a spherical bearing and a cone cable lined on the upper frame at the center (for example, patents) is disclosed. Reference 1).
[0003]
[Patent Document 1]
Japanese Examined Patent Publication No. 3-5211 [0004]
In the operation of the above-described rotary crusher, if the material to be crushed is a single load or the hardness of the material to be crushed is uneven, the cone cave is unevenly worn.
If this uneven wear is left unattended, the wear proceeds locally, so that the crushing efficiency is lowered, the product quality is deteriorated, and the corn cave must be replaced before the normal wear life.
For this reason, before the uneven wear increases greatly, the connection between the lower frame and the upper frame by the connecting means is released, and a roller is inserted between the upper frame and the lower frame raised by using a push bolt, a crane, etc. The corn cave is rotated together with the upper frame using a block or the like, and the position where the corn cave is worn is changed.
[0005]
[Problems to be solved by the invention]
However, in the conventional rotary crusher, in order to correct the uneven wear of the cone cave, after the connection of the lower and upper frames by the connecting means is released, the roller is raised between the upper frame and the lower frame raised by a push bolt or the like. The upper frame must be rotated by a chain block or the like, and there is a problem that a great deal of time and labor is required for the work of correcting the wear of the cone cave.
[0006]
Then, this invention makes it a subject to provide the rotation type crusher which can do the uneven wear correction work of a corn cave easily in a short time.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the rotary crusher of the present invention is connected to the lower frame in a separable manner by a large number of connecting means having an upper frame equally distributed on the outer periphery, and is lifted and lowered by a hydraulic support provided on the lower frame. The upper end of the main shaft, which is supported and is rotated by the rotational drive of the eccentric sleeve fitted to the lower end, is supported by the upper frame spider with the upper bearing, and the mantle attached to the main shaft and the upper frame are lined In a rotary crusher that forms an annular crushing chamber that narrows downward using a cone cave, a thrust spherical bearing provided on the upper end surface of the main shaft and a spider positioned above the main shaft by a bracket and held vertically And a push-up hydraulic cylinder from which the piston rod protrudes downward so that the thrust spherical bearing can be pressed.
[0008]
[Action]
In the rotary crusher of the present invention, the upper and lower frames are separated from the lower frame by extending the piston rod of the hydraulic cylinder for lifting in the state where the lower and upper frames are engaged and disconnected by the connecting means, The frame can be rotated around the piston rod of the push-up hydraulic cylinder.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are a schematic configuration diagram showing an example of an embodiment of a rotary crusher according to the present invention, and an enlarged view of a connecting means portion thereof.
[0010]
In the figure, reference numeral 1 denotes a substantially cylindrical lower frame. The lower frame 1 is placed on a gantry (not shown), and an upper frame inner peripheral surface thereof is fitted with a fitting portion of an upper frame described later. A taper 2 that is reduced in diameter toward the lower side is formed.
On the lower frame 1, a substantially cylindrical upper frame 3 having a fitting portion 3a that fits the taper 2 at the lower end portion and a spider (main shaft support portion) 3b at the upper end portion is provided on the outer periphery. Are connected in a separable manner by a large number (for example, 12 to 16) of connecting means 4 which are equally arranged.
The connecting means 4 is pivotally supported at the lower outer periphery of the lower frame 1 and extends in the tangential direction of the outer periphery, and the base of the cylinder body 6a is pivotally supported by the pivot pin 5 so that it can tilt outward. A connecting hydraulic cylinder 6, a screw ring 6 c screwed into the piston rod 6 b of the connecting hydraulic cylinder 6 so as to be movable in the longitudinal direction, and a tip of the piston rod 6 b of the connecting hydraulic cylinder 6. A substantially disc-shaped engaging piece 7 extending in the radial direction of the lower and upper frames 1 and 3, and a locking rod 8 penetrating the engaging piece 7 in parallel with the pivot pin 5, Corresponding to the connecting hydraulic cylinder 6, the upper frame 3 protrudes horizontally outward in the radial direction and has a bifurcated shape into which the piston rod 6 b and the engaging piece 7 of the connecting hydraulic cylinder 6 can be inserted. And the locking rod 8 on the upper surface It is composed of a locking portion 3c provided with engageable locking grooves 9.
[0011]
On the inner side of each locking portion 3c on the outer periphery of the upper frame 3, the engaging piece 7 is guided in accordance with the extension operation of the piston rod 6b of the connecting hydraulic cylinder 6, and the connecting hydraulic cylinder 6 is tilted outward. A rod-shaped cylinder guide 10 is provided.
And the top part of each engagement piece 7 and the outer periphery upper part of the upper frame 3 corresponding to them hold | maintain the inclination to the outer side of the hydraulic cylinder 6 for connection in the state from which the piston rod 6b removed from the latching | locking part 3c. They are connected by a flexible and detachable connector 11 such as a rope or chain.
For safety, a stopper 12 is provided on the outer periphery of the lower frame 1 to prevent the connecting hydraulic cylinder 16 from tilting.
[0012]
In the lower and upper frames 1 and 3, a main shaft 13 is disposed substantially on the axis, and the main shaft 13 is raised and lowered by a hydraulic support (not shown) provided on a boss portion of the lower frame 1. The eccentric sleeve fitted in the lower end portion is rotatably supported by a rotational drive mechanism (both not shown) so as to rotate, and the center of the spider 3b of the upper frame 3 is provided. The upper end portion is supported by an upper bearing 14 such as a spherical bearing provided in the portion.
At the center of the upper end surface of the main shaft 13, a receiving seat 15a having a concave spherical surface on the upper surface, and a swinging piece 15b having a convex spherical surface on the lower surface that engages the concave spherical surface of the receiving seat 15a and having an upper surface as a flat surface. A thrust spherical bearing 15 is provided, and a cylinder body 16 a of a lifting hydraulic cylinder 16 that pushes up the upper frame 3 separated from the lower frame 1 is attached to a spider 3 b of the upper frame 3 by a bracket 17. The piston rod 16 protrudes downward and is positioned vertically above the main shaft 13, and the tip surface of the piston rod 16 b of the push-up hydraulic cylinder 16 swings in the thrust spherical bearing 15. It is provided flat so as to be able to come into contact with the upper surface of the piece 15b.
An annular crushing chamber 20 that gradually narrows downward is formed by a mantle 18 attached to the main shaft 13 and a cone cave 19 lined on the upper frame 3.
In FIG. 1, reference numeral 21 denotes an inlet hopper mounted on the upper frame 3.
[0013]
In order to release the connection between the lower frame 1 and the upper frame 3 in the above-described rotary crusher, first, as shown in FIG. 3, the taper 2 of the lower frame 1 and the fitting portion 3a of the upper frame 3 are fitted. In order to release the alignment, after inserting a horseshoe-shaped spacer 22 between the screw ring 6c of each connecting hydraulic cylinder 6 and the respective locking portion 3c of the upper frame 3, the piston rod 6b of the connecting hydraulic cylinder 6 is moved. By performing the extension operation, the upper frame 3 is pushed up as indicated by an arrow A through the screw ring 6c and the spacer 22, and the fitting of the taper 2 of the lower frame 1 and the fitting portion 3a of the upper frame 3 is released. After the release, once the upper frame 3 is lowered, the spacer 22 is removed, and when the piston rod 6b of each connecting hydraulic cylinder 6 is extended again as shown in FIG. 4, the respective locking rods 8 and the locking portions 3c. As shown in FIG. 5, the coupling hydraulic cylinder 6 is automatically moved outward as the engagement pieces 7 are released from the engagement with the locking grooves 9 and the respective engagement pieces 7 are guided by the cylinder guides 10 and rise. And is held at a predetermined tilt angle by the connector 11 and the stopper 12.
At this time, the connector 11 gradually tilts and is tilted and held without being tilted to the stopper position all at once.
On the other hand, in order to connect the lower frame 1 and the upper frame 3, as shown in FIG. 6, when the piston rod 6 b of each connecting hydraulic cylinder 6 is contracted, each connecting hydraulic cylinder 6 is moved inward by the connecting tool 11. And the respective engagement pieces 7 are guided by the cylinder guide 10 and lowered, and the locking rod 8 is automatically inserted into the locking groove 9 of the locking portion 3c as shown in FIG. Engage. Then, the hydraulic pressure of each connecting hydraulic cylinder 6 is managed so as to be always constant.
[0014]
In the state where the lower frame 1 and the upper frame 3 are disconnected, if the biting of foreign matter or the like cannot be eliminated even by the lowering of the mantle 18, the taper 2 of the lower frame 1 and the upper frame 3 are fitted as shown in FIG. As in the case of releasing the fitting of the portion 3a, after inserting the spacer 22 between the screw ring 6c of the connecting hydraulic cylinder 6 and the locking portion 3c of the upper frame 3, the piston rod of the connecting hydraulic cylinder 6 is inserted. By extending 6b, the upper frame 3 can be pushed up to the vicinity of the stroke end as shown by the arrow A through the screw ring 6c and the spacer 22 to remove foreign matters.
In addition, in the state where the lower frame 1 and the upper frame 3 are not fitted, when the uneven wear of the cone cave 19 is corrected, as shown in FIG. After releasing the connection, the piston rod 16b of the push-up hydraulic cylinder 16 is extended, and the tip surface thereof is pressed against the upper surface of the swing piece 15b of the thrust spherical bearing 15 to press the upper frame 3 from the lower frame 1. After being lifted up and separated by several tens of millimeters, the upper frame 3 is appropriately rotated around the piston rod 16b of the push-up hydraulic cylinder 16 as indicated by an arrow B to change the position of the cone cave 19.
The upper frame 3 can be easily rotated with a slight force by the operator.
Further, when the mantle 18 and the cone cave 19 are to be repaired or replaced in a state where the lower frame 1 and the upper frame 3 are disconnected, the fitting portion between the taper 2 of the lower frame 1 and the upper frame 3 in the same manner as described above. After releasing the fitting of 3a, the upper frame 1 is lifted by a whistle or a crane and moved to a required place.
[0015]
In the embodiment described above, since the lower frame 1 and the upper frame 3 are automatically connected and released by the connecting hydraulic cylinder 6, the engagement piece is attached to the tip of the piston rod 6 b of the connecting hydraulic cylinder 6. 7, the cylinder guide 10 for guiding it is provided, and the engaging piece 7 and the upper frame 3 are connected by the connecting tool 11. However, the present invention is not limited to this. 7. The cylinder guide 10 and the connector 11 may not be provided.
Further, the stopper 12 is not necessarily provided, but is not limited to the case of providing the stopper 12 that prevents the connecting hydraulic cylinder 6 from tilting beyond the required angle.
[0016]
【The invention's effect】
As described above, according to the rotary crusher of the present invention, the upper frame is moved to the lower frame by extending the piston rod of the lifting hydraulic cylinder in the state where the lower and upper frames are disengaged by the connecting means. Since the upper frame can be rotated around the piston rod of the hydraulic cylinder for lifting after being separated from the base, the work for correcting the uneven wear of the cone cave can be carried out in an extremely short time, 1/3 of the conventional method, and with a slight force by the operator. Can be done easily.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an example of an embodiment of a rotary crusher according to the present invention.
2 is an enlarged view of a connecting means portion of the rotary crusher of FIG. 1. FIG.
FIG. 3 is an explanatory diagram of a process for releasing the engagement between the lower frame side plate and the upper frame in the rotary crusher of FIG. 1;
FIG. 4 is an explanatory diagram of a step before disconnection of the connecting means shown in FIG. 2;
FIG. 5 is an explanatory diagram of a process after releasing the connection of the connecting means shown in FIG. 2;
6 is an explanatory diagram of a pre-connection process of the connection means shown in FIG. 2. FIG.
7 is an explanatory view of a post-connection process of the connection means shown in FIG. 2. FIG.
8 is an operation explanatory diagram of the rotary crusher of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower frame 3 Upper frame 3b Spider 4 Connecting means 13 Main shaft 14 Upper bearing 15 Thrust spherical bearing 15a Receiving seat 15b Swing piece 16 Pushing hydraulic cylinder 16a Cylinder body 16b Piston rod 17 Bracket 18 Mantle 19 Cone cave 20 Crushing chamber

Claims (1)

Rotation of an eccentric sleeve that is detachably connected to the lower frame by a number of connecting means equally distributed on the outer periphery, supported by a hydraulic support provided on the lower frame so as to be movable up and down, and fitted to the lower end The upper end of the spindle that is rotated by the drive is supported by the upper frame spider with the upper bearing, and the mantle attached to the spindle and the cone cave lined on the upper frame form an annular crushing chamber that narrows downward. In the dynamic crusher, the thrust spherical bearing provided on the upper end surface of the main shaft and the spider are positioned vertically above the main shaft by the bracket, and the piston rod protrudes downward so that the thrust spherical bearing can be pressed. A rotary crusher characterized by comprising a hydraulic cylinder for lifting.

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