JPH04256448A - Device for setting control of crusher - Google Patents

Abstract

PURPOSE:To offer setting control device of crusher capable of simply changing automatically the setting amount of crushing part of the crusher during operation by remote operation. CONSTITUTION:This device is provided with a ratchet mechanism (bowl locking 50) which plural mumbers of driving bard 42 are provided projectingly and extendedly at regular internals in the vertical direction on the outer peripheral surface of the adjustment cap 40 installed on the upper end of the bowl and the rotation of the adjustment cap 40 is suppressed by abutting on the driving bar 42 rotable around the vertical shaft through a spring power, and is also horizontal/arranged with a pair of hydraulic cylinder 44 for rotating right and left side direction, releasing locking of the ratchet mechanism in accordance with the forwarding of the piston rod and rotating forcedly by pressing side surface of the driving bar 42.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a set adjustment device for adjusting the minimum gap in the crushing section of a crusher that produces coarse and fine aggregates used for concrete, asphalt mixture, etc.

0002

[Prior Art] Conventionally, a mantle was attached to cover a pine cone-shaped head that moved up and down while rotating eccentrically around a vertical axis, and the inside of a bowl was stationary on the outer periphery of the mantle. In a type of crusher in which raw material is crushed with a bowl liner, such as a cone crusher or a gyra disc, the minimum gap formed between the mantle and bowl liner is called a set, and this set amount is adjusted to improve the product of the crusher. The size was controlled. When adjusting the set amount, as shown in FIG. 1, while the adjustment ring 22 loaded on the main frame 2 remains stationary, the bowl 20 that is screwed thereto is enlarged to the set amount. To do this, counterclockwise,
It was necessary to rotate clockwise to reduce the set amount. To do this, the bowl 20 and bowl liner 21 are
Since the total weight of the adjustment cap 40 is large, the adjustment cap 40 is attached to the upper end of the bowl in advance, and each wire is hung from hooks provided at four locations around the circumference using a lifting means such as a crane.
With the gravity free, the wire can be rotated by a specified amount by hand pushing by two or three workers, or the wire can be directly hung on the hook without lifting and wrapped around the outer circumference of the adjustment cap 40 several times. The other end of the wire was then rotated horizontally using a shovel loader, hoist, truck, other pulling device, or pulley, but all of these methods were complicated and required long operational outages. was.

0003

[Problems to be Solved by the Invention] In the device of the present invention, instead of such complicated and time-consuming work, it is possible to easily and automatically change the set amount by remote control during operation. That is.

0004

[Means for Solving the Problems] In order to solve the above problems, the crusher set adjustment device of the present invention includes a main frame, and an adjustment device mounted on the main frame and screwed onto the inner peripheral surface. a ring, a bowl whose outer circumferential surface is screwed and can be moved in the vertical direction by being screwed into the adjustment ring, and a main shaft which is disposed at the center bottom of the main frame and is vertically or nearly vertically supported via a boss. A crusher comprising: an eccentric fitted to the main shaft via a bearing and rotated eccentrically with respect to a vertical axis; a head fitted to the eccentric via a bearing and rotated; and rotational driving means for the eccentric. , a plurality of drive bars are protruded from the side surface of the bowl or an adjustment cap having a cylindrical surface and arranged at the upper end of the bowl at equal intervals around the circumference, and are rotatable around a vertical axis and are driven by a spring force. A ratchet mechanism is provided which abuts against the drive bar and prevents the bowl from rotating, and which unlocks the ratchet mechanism as the piston rod moves forward and moves the bowl to the right by pressing the side surface of the drive bar. A pair of hydraulic cylinders that rotate in a circular or counterclockwise direction are arranged horizontally on the outside of the bowl or the adjustment cap so as to be freely rotatable around a vertical axis.

[0005]

In the set adjustment device of the present invention, when the bowl is rotated clockwise, the piston rod of the clockwise ram cylinder 44A of the pair of hydraulic cylinders 44 is projected. Then, the striker 44a of the ram cylinder 44A overcomes the biasing force of the tension coil spring 50b for tensioning the bowl lock 50.
At the same time, the driver 44b, which is also provided at the tip of the piston rod, comes into contact with one side of the drive bar 42 provided on the adjustment cap 40, and the adjustment cap 40 is rotated. Rotate clockwise by one pitch. Thereafter, the piston rod of the ram cylinder 44A once retreats and moves forward again to perform the same operation and rotate the adjustment cap 40 by one pitch. Thereafter, the set amount is changed by rotating by the required pitch in the same manner. Turn the bowl to the left (counterclockwise)
In the case of rotation, the counterclockwise ram cylinder 44B is driven and the same operation is performed.

[0006]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 1 to 4 show an embodiment of the crusher set adjustment device of the present invention, and FIG. 1 is an overall vertical sectional view of the crusher;
FIG. 2 is a partial cross-sectional perspective view of the crusher, FIG. 3 is an enlarged perspective view of the main part of the set adjustment device, and FIG. 4 is a plan view of the main part of the set adjustment device.

In the figure, 1 is a crusher, 2 is a main frame, and a vertical main shaft 4 is erected from a boss 3 at the lower center of the main frame 2. A cylindrical eccentric 5 that is slightly eccentric from the central axis is fitted into the upper half of the main shaft 4 via an eccentric bush 6, and a pine cone-shaped head 8 is fitted via a head bush 7. equipped. The outside of the head 8 is covered with a similarly pine-shaped mantle 9, and the raw material is crushed between the mantle 9 and a bowl liner 21, which will be described later. On the lower end surface of the eccentric 5, there is an eccentric 5 and a head 8 that rotate between a pair of upper and lower thrust bearings 18 and 19.
The main shaft 4 transmits the full load of the mantle 9 and the compressive load during the crushing movement to the main frame 2.
A head ball 16 is seated on a spherical seat 17 at the upper end of the ball to promote smooth rotation. A gear 10 composed of a bevel gear is fixedly installed on the outer periphery of the lower end of the eccentric 5.
The eccentric 5 is rotatably driven by a pulley 14 and via a pinion 11 of a bevel gear at the tip of a horizontal rotating shaft 12 which is supported by bearings 13, 13. A feed plate 15 distributes the raw material input into the hopper 23 equally around the circumference.

On the other hand, an adjustment ring 22 is placed on the upper end surface of the main frame 2 via a tapered surface, and is constantly pulled downward via a release cylinder 25 so as to be brought into close contact with the main frame 2. Between the main frame 2 and the adjustment ring 22, four to six through holes are provided in the circumference, and main frame pins 2a for preventing rotation are passed through them. A right-handed tapered screw is threaded on the inner peripheral surface of the adjustment ring 22, and is screwed together with the bowl 20, which also has a right-handed taper screw threaded on the outer periphery.
The bowl 20 is configured to be movable up and down by the rotation. In addition, in order to lock the threaded connection between the adjustment ring 22 and the bowl 20 during operation, a clamp ring 22a similarly screwed onto the inner peripheral surface is placed on the adjustment ring 22, and the piston rod is secured to the clamp ring 22a. The piston rod of a clamping cylinder 24, which is fastened to the adjustment ring 22 and whose cylinder is fixed to the clamp ring 22a, is protruded by hydraulic pressure to apply a strong force to the contact surfaces of both screws. .

A bowl liner 21 is fixedly installed inside the bowl 20 and forms a crushing chamber with the mantle 9. An adjustment cap 40 is fixed to the outer periphery of the upper end of the bowl 20 with stud bolts.

Next, the set adjustment device will be explained. As shown in Figures 3 and 4, the adjustment cap 4
Protruding drive bars 42 made of square timber are arranged at equal intervals on the outer periphery of the drive bar 0. On the outside of the adjustment cap 40, there is a bowl lock 50 that is rotatable around a vertical shaft 50a and has a protrusion 50c facing inward at the center. A tension coil spring 50b is mounted between the fixed bracket and one end of the bowl lock 50. Therefore, unless the bowl lock 50 is unlocked,
Due to the ratchet mechanism, the tip of the protrusion 50c is always in contact with the peripheral wall of the adjustment cap 40, and when the side surface of the protrusion 50c and the side surface of the drive bar 42 are in contact with each other, the adjustment cap 40 cannot be rotated. However, by forming the other surface of the protrusion 50c into a tapered shape, the adjustment cap 50
When rotating counterclockwise, this bowl lock 50 is flipped up to allow rotation.

A pair of ram cylinders 44 are horizontally arranged on the tip side of the bowl lock 50 so as to be rotatable around a vertical shaft 45 located approximately at the center.
4, that is, the cylinder rod side ends of the clockwise ram cylinder 44A and the counterclockwise ram cylinder 44B are fastened together by a tension coil spring 46, and the piston rod side is biased to face the adjustment cap 40 side. ing. At the tip of the piston rod of the ram cylinder 44, a bowl lock 50 is attached to the drive bar 42 due to its protrusion.
A striker 44a that is rotationally driven in a direction that makes it more detachable.
is attached to the piston rod, and above it is the piston rod.
A driver 44 that presses the side surface of the drive bar 42 is attached. Therefore, as the piston rod advances, the bowl lock 50 is unlocked and the drive bar 42 is simultaneously pressed, so that the adjustment cap 40 can be rotated. When rotating the adjustment ring 40 clockwise, use the ram cylinder 4
When driving 4A and rotating it counterclockwise, use the ram cylinder 44.
Drive B.

The operation of the crusher set adjustment device of the present invention constructed as described above will be explained. First, as a result of wear of the mantle 9 and bowl liner 21 that form the crushing part, products larger than the desired product size come out.If you want to correct the set amount immediately,
0, that is, it is necessary to rotate the adjustment cap 40 clockwise and lower it to change the set amount to a smaller value. In such a case, the clamping cylinder 2
4 is released, the screw locking force between the bowl 20 and the adjustment ring 22 is released, and the bowl 20 is made ready to rotate. Next, determine how many pitches to rotate based on the pre-calculated vertical movement amount per pitch of the drive bar 42 and the required change amount, and rotate the piston rod of the clockwise ram cylinder 44A this number of times. By moving forward and backward by a predetermined number of pitches, the adjustment cap 40 rotates by a predetermined number of pitches and descends by a required amount to change the set amount. When increasing the set amount, the same operation is repeated using the ram cylinder 44B. After the set change is completed, the piston rod is retracted to the retract limit so that the protrusion 50c of the bowl lock 50 comes into contact with one of the drive bars 42 and is locked. In addition, the vertical movement distance for one pitch of the drive bar mentioned above is 0.5 to 1
．． It is preferable to select a range of 0 mm and the number of drive bars 42.

In this way, each time it is necessary to change the set amount, a command can be sent to the hydraulic unit 60 that operates the clamping cylinder 24 or the ram cylinder 44, thereby remotely controlling the amount, and even during operation. By automatically rotating the adjustment cap 40, the set amount can be easily changed in a short time.

Note that the stationary adjustment ring 22
In contrast, the bowl 20 is provided so as to be able to move up and down, and a plurality of vertical hydraulic cylinders are provided between the two on the circumference.
It is also possible to change the set amount by raising and lowering the set amount, but in this case, the hydraulic cylinder must be filled with pressure oil at all times in order to maintain the specified set amount. However, it is impossible to completely eliminate leakage of pressure oil in the hydraulic cylinder for a long period of time, from several months to one year, and the set amount changes depending on the amount of leakage, which is not preferable. In contrast, in the present invention, the adjustment ring 22 and the bowl 20 are screwed together, and the screw rotation is locked by the bowl lock 50, so that the above-mentioned disadvantages do not occur and the present invention is superior.

[0015]

[Effects of the Invention] As explained above, the crusher set adjustment device of the present invention can be easily and automatically controlled by remote control during operation by operating the drive bar, bowl lock, and ram cylinder provided on the adjustment cap. By rotating the bowl relative to the adjustment ring, the bowl can be moved up and down and the set amount can be changed to any desired value, thereby preventing loss of time due to idle rotation and significantly improving maintainability. Furthermore, since the threading between the adjustment ring and the bowl is locked after setting is completed, the setting amount remains unchanged and the uniformity of product size is maintained.

[Brief explanation of the drawing]

FIG. 1 is an overall vertical sectional view of a crusher showing one embodiment of the present invention.

FIG. 2 is a partially sectional perspective view of a crusher showing one embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a main part of a crusher set adjustment device showing one embodiment of the present invention.

FIG. 4 is a plan view of essential parts of a crusher set adjustment device showing one embodiment of the present invention.

[Explanation of symbols]

1 Crusher 2 Mainframe 2a Main frame pin 3 Boss 4 Main shaft 5 Eccentric 6 Eccentric bush 7 Head bush 8 Head 9 Mantle 10 Gear 11 Pinion 12 Rotation axis 13 Bearing 14 V pulley 15 Feed plate 16 Head ball 17 Spherical seat 18 Upper thrust bearing 19 Lower thrust bearing 20 Bowl 21 Bowl liner 22 Adjustment ring 22a Clamping ring 23 Hopper 24 Clamping cylinder 25 Release cylinder 40 Adjustment cap 42 Drive bar 44 Ram cylinder 44a Striker 44b driver 44A Clockwise ram cylinder 44B Ram cylinder for counterclockwise rotation 45 Vertical axis 46 Tension coil spring 50 Bowl Rock 60 Hydraulic unit

Claims (1)

[Claims] [Claim 1] A main frame, an adjustment ring mounted on the main frame and screwed on the inner circumferential surface, and an adjustment ring screwed on the outer circumference and movable in the vertical direction by being screwed into the adjustment ring. A bowl, a main shaft disposed at the center bottom of the main frame and supported vertically or substantially vertically via a boss, and an eccentric that is fitted onto the main shaft via a bearing and rotates eccentrically with respect to the vertical axis. , a crusher having a rotating head fitted on the eccentric via a bearing, and a rotational drive means for the eccentric; A plurality of drive bars are protruded at equal intervals, and a ratchet mechanism is provided which is rotatable around a vertical axis and which abuts against the drive bars through a spring force to prevent rotation of the bowl, and which prevents the piston rod from moving forward. A pair of hydraulic cylinders are installed on the outside of the bowl or the adjustment cap with vertical shafts to release the lock of the ratchet mechanism and press the side surface of the drive bar to rotate the bowl clockwise or counterclockwise. A crusher set adjustment device characterized by being horizontally arranged so as to be rotatable.