JP2003159538A - Cone crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components necessary for regulating the gap between a mantle 13 and a conecave 14. <P>SOLUTION: A mantle 13 and a conecave 14 are provided opposite to each other within cylindrical upper and lower frames 12, 11, which are coaxial with each other, and a material a to be treated is fed into a portion between the mantle and the conecave being rotated and is crushed. The upper frame is screwed into the lower frame so as to be liftable/lowerable, the conecave is mounted directly on the inner surface of the upper frame, and a wedge 51 for locking the lifting/lowering of the frame is provided between the upper and lower frames. Upon the lifting/lowering of the upper frame, the conecave can also be lifted/lowered to change the gap between the conecave and the mantle. This can eliminate the need to provide the conventional bowl-shaped shell. The wedge can easily obtain the fitting force and has high pressure contact force, and, thus, reliable locking can be realized. A hydraulic cylinder for a wedge is of a double acting type and is constructed so that a hydraulic chamber in its end wall, to which hydraulic pressure is applied at the time of fitting of the wedge, functions as a piston wall energized by a disc spring to keep the fitting force of the wedge constant even upon the occurrence of leak in the hydraulic circuit. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corn crusher used when crushing rock to produce crushed stone, sand or the like.

[0002]

2. Description of the Related Art This type of corn crusher is available in Japanese Patent Publication Sho 3
As disclosed in Japanese Patent Publication No. 9-6929 and Japanese Patent Publication No. 42-2224, and as shown in FIG. 8, a mantle 3 and a cone cave 4 are provided to face each other in the cylindrical upper and lower frames 1 and 2 having the same axis. , The mantle 3 is rotated via the drive shaft 5, the eccentric 6 and the like, and the object a such as rock is crushed between the eccentric surface of the mantle 3 and the cone cave 4 by the rotation to form a sandy matter b. To do.

In this cone crusher, it is necessary to adjust the gap between the mantle 3 and the cone cave 4 to a required gap according to the size of the sand b or the abrasion of the mantle 3 and the cone cave 4. Therefore, conventionally,
The bowl-shaped shell 7 is screwed onto the upper frame 2, the cone cave 4 is attached to the shell 7, and the shell 7
Is engaged with the pinion 8 and the pinion 8 is rotated by the handle 8a to rotate the shell 7 up and down to adjust the clearance between the mantle 3 and the cone cave 4.

Further, a lock ring 9 is screwed onto the bowl-shaped shell 7, and the lock ring 9 is turned by a worm 9a to press against the threads of the shell 7 so that the bowl-shaped shell 7 is locked to the upper frame 2. Thus, the slack after adjusting the gap is prevented (for details, refer to Japanese Patent Publication No. 42-2224).

[0005]

Since the conventional cone crusher is provided with the bowl-shaped shell 7 for adjusting the gap between the mantle 3 and the cone cave 4, the number of parts is large,
The cost has increased accordingly. Further, the gap lock is performed by pressing the lock ring 9,
Sufficient locking cannot be performed only by pressure contact, and therefore the gap is likely to change, and the size of the sand b is not reliable.

In view of the above situation, the present invention has a first object to reduce the number of parts and a second object to improve the reliability of the gap lock.

[0007]

In order to achieve the first object, the present invention allows the upper frame to move up and down on the lower frame, and the cone cave is directly attached to the inner surface of the upper frame. is there. By doing so, the cone cave can also be elevated by changing the height of the upper frame to change the gap between the cone and the mantle. Therefore, the conventional bowl-shaped shell becomes unnecessary.

Next, in order to achieve the second object, according to the present invention, a wedge is fitted between the upper and lower frames to lock the gap. Since the wedge easily receives the fitting force and has a high pressure contact force, the locking action becomes reliable.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As an embodiment of the present invention, a mantle and a cone cave are provided facing each other in a cylindrical upper and lower frame having the same axis, and the mantle is rotated,
In a cone crusher that feeds and crushes an object to be processed between the mantle and the cone cave, the upper frame is fitted in the lower frame so as to be able to move up and down, and the cone cave is directly attached to the inner surface of the upper frame, and between the upper and lower frames. A configuration provided with a means for locking the lifting can be adopted.

In this structure, the upper frame can be moved up and down by screwing on the lower frame, the lower frame is provided with a rotating means for the upper frame, and the locking means is a wedge fitted between the upper and lower frames and the wedge thereof. And a hydraulic cylinder for advancing and retracting.

The hydraulic cylinder is of a double-acting type, and the end wall of the hydraulic chamber to which the hydraulic pressure is applied when the wedge is fitted serves as a piston wall, and the piston wall is biased in the pressing direction by a spring. Then, even if the piston rod fluctuates or the hydraulic circuit leaks for some reason, the spring slides on the piston wall to eliminate the hydraulic pressure drop due to the leak, and the wedge fitting input (hydraulic pressure) is applied. Therefore, the locked state is reliably maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment is shown in FIGS. 1 to 5, in which a tubular lower frame 11 and a tubular upper frame 12 are screwed so as to be able to move up and down. A screw ring 17 is provided on the outer periphery of the upper frame 12, and a pinion 19 supported by an upright frame 18 meshes with the screw ring 17. Therefore, when the long pinion 19 is rotated by the electric motor 20, the upper frame 12 is rotated via the screw ring 17 to move up and down with respect to the lower frame 11. The pinion 19 and the screw ring 17 are coupled by self-locking, and the pinion 1
Unless the 9 is turned, the screw ring 17 does not rotate, so that the upper frame 12 is locked in place with respect to the lower frame 11.

An opening is formed in the center of the upper portion of the upper frame 12, and a hopper 21 is attached to the opening. From this hopper 21, an object a to be treated such as rock is put. A cone cave 14 is replaceably attached to the inner surface of the opening of the upper frame 12 over the entire circumference thereof, and a mantle 13 is provided so as to face the cone cave 14. The mantle 13 is replaceably attached to a truncated cone-shaped core head 22 over the entire circumference thereof. The apex angle θ of the mantle 13 is set to 110 degrees. However, the apex angle θ is arbitrary. The mounting nut 23a of the mantle 13 has a right-hand thread.

The spindle 23 of the core head 22 has a spherical bearing 24.
Is supported by the core head shaft 25 through the spherical bearing 2
It is possible to rotate while swinging with a spherical surface of 4. The core head shaft 25 is rotatably supported by a cylindrical bearing 26 fixed to the lower frame 11. The core head 22 has a bearing 27
Is supported by an eccentric 16 via a bearing 28, and the eccentric 16 is rotatably fitted in a cylindrical bearing 26 via a bearing 28. The axis of the outer peripheral surface of the eccentric 16 is inclined with respect to its fitting axis (the axis of the bearing 26). Therefore, when the eccentric 16 rotates, the core head 22 (mantle 13) rotates while swinging. That is, the upper surface of the mantle 13 forms an eccentric surface.

A bevel gear 29 is provided around the entire lower portion of the eccentric 16, and the drive shaft 15 is attached to the gear 29.
The bevel gear 30 meshes. Therefore, when the drive shaft (15) is rotated counterclockwise by the driving machine (not shown) via the pulley 31, the eccentric 16 is rotated by the gears 30, 29 and the core head 22 (mantle 13).
Rotates. In the figure, 33 and 34 are eccentric 16
It is a wall to prevent dust from entering the room.

A hydraulic cylinder 32 is incorporated in the lower portion of the core head shaft 25 in the cylindrical bearing 26, and the piston 32a of the hydraulic cylinder 32 is incorporated into the upper wall 26a.
The core head shaft 25 is raised until it abuts on the upper surface of the mantle 13 to be positioned. This hydraulic cylinder 32
Is connected to the hydraulic device 40 shown in FIG. In this hydraulic system, an oil pressure is applied to the hydraulic cylinder 32 from an oil tank 41 by a gear pump 42 via an oil amount adjusting valve 43, and an uncrushable foreign matter is caught between the mantle 13 and the cone cave 14 to exert an abnormal load. Then, the hydraulic pressure is absorbed by the accumulator 44, the hydraulic cylinder 32 contracts, the mantle 13 is lowered, and the foreign matter is discharged downward. When the discharge is completed, the accumulator 44
The hydraulic cylinder 32 extends and the mantle 13 returns to a predetermined position. In FIG. 5, 45 is a pressure gauge and 46 is a safety valve.

Threaded portion 1 of the upper and lower frames 11, 12
Wedges (wedges) 51 around the 1a and 12a quantiles
Can be inserted freely. The number of wedges 51 is arbitrary. At the fitting portion of the wedge 51, the lower frame 1
1 is formed with a fitting groove 52, and the wedge 51 is slidably fitted in the fitting groove 52 in the vertical direction.
The second screw portion 12a is missing over the entire circumference. Therefore, the wedge 5 can be moved at any position where the upper frame 12 is moved up and down.
1 is the screw parts 11a, 12a of the upper and lower frames 11, 12,
Can be locked into position.

The lower portion of the wedge 51 is connected to a piston rod 54 of a hydraulic cylinder 53, and the wedge 51 shown in FIG.
When the piston rod 54 of FIG. 2 is extended, the screw shafts 11a, 1
2a, and the piston rod 5 as shown by the chain line in FIG.
At the time of contraction of 4, loosen the fitting between the screw parts 11a and 12a,
The upper frame 12 is rotatable. Hydraulic cylinder 53
Is a double-acting type, as shown in FIG.
A piston wall 55 is slidably provided on 3a, and a disc spring 56 is interposed between the piston wall 55 and the end wall. Due to the biasing force of the disc spring 56, the hydraulic chamber 53a
The oil pressure inside is kept constant. Therefore, even if a leak occurs in the hydraulic circuit to the hydraulic cylinder 53 in the locked state of the threaded portions 11a and 12a in which the piston rod 54 has expanded, the disc spring 56 keeps the fitting force of the wedge 51 constant. . A well-known spring such as a coil spring may be used instead of the disc spring 56.

This embodiment is configured as described above, and when the object a to be treated such as rock is put into the hopper 21, the mantle 13 and the cone cave 14 which rotate are rotated.
Crushed between them to form a sandy substance b such as crushed stone, which is discharged from the discharge port of the lower frame 11 not shown.

In this operation, when the desired size of the sand b is changed or the mantle 13 or the cone cave 14 is worn and the gap between the mantle 13 and the cone cave 14 is adjusted, the chain line in FIG. As shown in FIG. 3, after moving the wedge 51 downward, the pinion 19 is rotated to rotate the upper frame 12 to move it up and down to make a desired clearance between the mantle 13 and the cone cave 14.
Then, the wedge 51 is fitted between the screw portions 11a and 12a to lock the upper and lower frames 11 and 12.

In the above embodiment, the screw portion 11a of the lower frame 11 is a male screw and the screw portion 12a of the upper frame 12 is a female screw, but as shown in FIG.
Female part 11a of the upper frame 12
2a can be a male screw. Further, as shown in the figure, the wedge 51 may be fitted in the radial direction. in this case,
It is only necessary to partially form the through hole 57 of the wedge 51 on the lower frame 11 side. That is, as in the embodiment of FIG. 1, the wedge 51 is formed around the entire threaded portion 12a of the upper frame 12.
Need not be formed.

The hydraulic cylinder 53 having the spring 56 and the piston wall 55 is not limited to this embodiment, but can be incorporated in various hydraulic circuits to compensate for the hydraulic leak. Therefore, it can be used in various devices.

[0023]

As described above, according to the present invention, since the cone cave is directly attached to the upper frame, the number of parts can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an embodiment.

FIG. 2 shows a main part of the embodiment, (a) is an enlarged view,
(B) is the sectional view on the AA line of (a).

FIG. 3 is an operation diagram of the same embodiment.

FIG. 4 is a sectional view of the hydraulic cylinder of the embodiment.

FIG. 5 is a schematic diagram of a hydraulic circuit of the same embodiment.

FIG. 6 is a sectional view of a main part of another embodiment.

7A is an enlarged view of a main part of FIG. 6, and FIG. 7B is a sectional view taken along line AA of FIG.

FIG. 8 is a schematic cross-sectional view of a conventional example.

[Explanation of symbols]

1, 11 Lower frame 11a Lower frame screw part 2,12 Upper frame 12a Screw part of upper frame 3,13 mantle 4,14 corn cave 5,15 drive shaft 6, 16 eccentric 17 Screw ring for rotating the upper frame 19 Pinion for rotating upper frame 21 Material input hopper 22 core head 25 core head axis 32 buffer hydraulic cylinder 51 wedge 53 hydraulic cylinder 55 Piston wall 56 disc spring a Processing object b Sandy matter

Claims (3)

[Claims] 1. Cylindrical upper and lower frames 12, 1 having the same axis
A mantle 13 and a cone cave 14 are provided to face each other in the cone 1, and in a state where the mantle 13 is rotated, the object a is sent between the mantle 13 and the cone cave 14 for crushing. The upper frame 12 is fitted in the upper and lower portions of the upper frame 12 so that the cone cave 14 can be directly attached to the inner surface of the upper frame 12, and the upper and lower frames 12, 1
A cone crusher characterized by being provided with a means for locking the ascent and descent between the one. 2. The upper frame 1 to the lower frame 11
2 can be moved up and down by screwing 11a and 12a,
Rotating means 17 of the upper frame 12 on the lower frame 11,
19 is provided, and the locking means includes the upper and lower frames 12,
The cone crusher according to claim 1, comprising a wedge 51 that is fitted between 11 and a hydraulic cylinder 53 that advances and retracts the wedge 51. 3. The hydraulic cylinder 53 is a double-acting type, and the end wall of the hydraulic chamber to which the hydraulic pressure is applied at the time of the wedge fitting becomes a piston wall 55, and the piston wall 55 has a spring 5 formed therein.
The cone crusher according to claim 2, wherein the cone crusher is urged in the pressing direction by 6.