JP2003038968A - Apparatus for adjusting gap of impact crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for adjusting a gap of an impact crusher in which the gap between a hitting plate and a repulsing plate can easily be adjusted optionally and the size of the gap can surely be kept by a simple structure. SOLUTION: A to-and-fro part 65 of this apparatus 60 is made to be a screw type consisting of a bolt member 67 and a nut member 66 to be rotationally driven with a hydraulic motor 64. As a result, the repulsing plate fit to the member 67 side can be moved continuously only by rotating the member 66 by a necessary amount in the normal or reverse direction so that the gap between the hitting plate and the repulsing plate can easily be adjusted optionally. Since the members 66 and 67 are screwed on each other, the gap can surely be kept as it is without shifting in the moving direction of the repulsing plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gap adjusting device for an impact crusher, and more particularly to a gap adjusting device for adjusting a gap between a striking portion of an impact crusher and a repulsion plate.

[0002]

BACKGROUND ART It has been conventionally known to crush objects such as large concrete blocks, asphalt blocks, and natural stones such as andesite that come out of a building demolition site or a crushing site with an impact crusher. Such an impact crusher crushes the crushed object by hitting the crushed object with the striking plate (striking part) of the rotating rotor and colliding the crushed object smashed by this striking with the repulsion plate. To do. At this time, the size of the crushed material (the size of the crushed material after crushing) is determined by the gap between the striking plate and the repulsion plate. Therefore, in order to obtain the crushed material of a predetermined size, the repulsion plate is used. Must be moved to accurately adjust and maintain the gap with the striking plate. As means for adjusting this gap, for example, in Japanese Patent Laid-Open No. 8-266921, the gap between the impact plate and the impact plate is automatically moved by moving the repulsion plate from the contact position (zero point position) with the impact plate by a hydraulic cylinder. The method of adjusting the value is described.

[0003]

However, if the repulsion plate is moved by the hydraulic cylinder, it is possible to move it by a preset stroke, but it is difficult to stop it at an arbitrary position. That is, when using a hydraulic cylinder, in order to move and stop the repulsion plate according to the particle size distribution of the crushed material to be obtained, and thus adjust the gap between the striking plate and the repulsion plate, There is a problem in that the structure becomes complicated because a sensor that can detect the stroke amount at, and a complicated hydraulic circuit are required.

Further, according to the method described in the above publication, the repulsion plate is held by the hydraulic cylinder, but the piston rod connected to the repulsion plate is pushed back depending on the size and hardness of the crushed object. Therefore, the size of the gap temporarily fluctuates and is not maintained satisfactorily, and the particle size distribution of the crushed material obtained during that time becomes large. Therefore, in order to surely hold the repulsion plate at the position after the clearance adjustment, for example, a mechanical holding mechanism is additionally required, and this also causes a problem that the structure becomes complicated.

It is an object of the present invention to provide a gap adjusting device for an impact crusher which can easily and arbitrarily adjust the gap between the striking part and the repulsion plate, and which can surely maintain the size of the gap with a simple structure. is there.

[0006]

The gap adjusting device according to the first aspect of the present invention comprises a rotating body having a striking portion, a repulsion plate arranged with a gap from the striking portion, and the rotating member. A case to which the body and the repulsion plate are attached, a repulsion plate side member attached to the repulsion plate side, a case side member screwed or meshed with the repulsion plate side member and attached to the case, and the case side member. And a drive unit that is rotationally driven, and a gap between the striking unit and the repulsion plate can be adjusted according to a rotation amount of the case-side member.

Here, when the repulsion plate side member and the case side member are screwed together, for example, one member has a nut shape, the other member has a bolt shape, and both members are connected by a screw type. When you say something. Further, the engagement of the repulsion plate side member and the case side member means, for example, a case where one member has a rack shape, the other member has a pinion shape, and both members are engaged with each other in a meshing manner. . And
In such a case, the other member side (pinion shape side) is usually driven to rotate.

In such a gap adjusting device, the repulsion plate is supported by the repulsion plate side member and the case side member which are screwed or meshed with each other, and the case side member is rotated by the drive portion in the forward and reverse directions by a required amount. Only by this, the repulsion plate side member moves steplessly with respect to the case side member, and the gap between the striking part and the repulsion plate is easily and arbitrarily adjusted. Further, the repulsion plate side member and the case side member that are screwed or meshed with each other do not shift in the moving direction of the repulsion plate when the repulsion plate is stationary. The plate is securely held and the size of the gap is reliably maintained.

According to a second aspect of the present invention, there is provided a gap adjusting device according to the first aspect, wherein the repulsion plate side member and the case side member, which are screwed or meshed with each other, extend and contract at least partially. It is characterized in that it is covered with a cover member having a portion, and both ends of the cover member in the expansion and contraction direction are attached to the repulsion plate side and the case side. According to such a gap adjusting device, since the repulsion plate side member and the case side member are covered with the cover member that partially has the expansion and contraction portion, the cover member also expands and contracts following the operation of these members, and each member Good coverage at all times. Therefore, there is no concern that dust, water, or the like will enter the threaded portion, the meshed portion, or the like of the repulsion plate side member and the case side member, and the durability of the gap adjusting device is improved. Both ends of the cover member may be attached to the repulsion plate itself and the case itself, or may be attached to a portion of the repulsion plate side member closer to the repulsion side and a portion of the case side member closer to the case side.

A gap adjusting device for an impact crusher according to a third aspect of the present invention is the gap adjusting device for an impact crusher according to the first or second aspect, wherein the drive unit is configured to rotate the case side member, and It is characterized in that it is attached to the case via an elastic member. In such a gap adjusting device, since the drive unit is fixed to the case side, the reliability of the drive unit is improved as compared with the case where the drive unit is attached to the repulsive plate side where there are many vibrations. Further, since the drive unit is fixed via the elastic member, for example, in the case of a screw type in which the repulsion plate side member and the case side member are screwed, and the repulsion plate is rotatably supported by the case. As is obvious from the above, even if each member is slightly tilted due to the rotation of the repulsion plate, the external force applied to the drive unit due to this tilt is absorbed by the elastic deformation of the elastic member, and the drive unit and each member are The positional relationship between the drive unit and the case-side member is reliably maintained by maintaining a good positional relationship with the drive unit. It is desirable that the drive unit is provided outside the case. By doing so, the drive unit is less likely to be affected by dust and the like, and the maintenance and the like are facilitated.

A gap adjusting device for an impact crusher according to a fourth aspect is the gap adjusting device for an impact crusher according to any one of the first to third aspects, in which the case side member is rotated by the drive portion. It is characterized in that it is provided with an operation section that can be operated by a tool, and can be rotated by manually operating this operation section. According to such a gap adjusting device, even when the drive unit does not operate for some reason, the gap can be adjusted manually by rotating the case side member by operating the operation unit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an entire mobile crusher 1 according to the present embodiment, and FIG. 2 is a mobile crusher 1
FIG. 3 is a view of the crushed object as seen from the input side, and FIG. 3 is a plan view of the mobile crusher 1.

[General Description of Mobile Crusher] In FIGS. 1 to 3, the mobile crusher 1 has a construction in which a working machine 3 and a power unit 4 are mounted on a base 2. The base part 2 is
It is provided with a pair of crawler type traveling units 10 for self-propelled in a work site, and a frame 20 to which the traveling units 10 are attached and on which the working machine 3 and the power unit 4 are placed. The working machine 3 has an impact crusher (hereinafter, referred to as a crusher) 30 mounted substantially in the center of the base portion 2.
The crushed material supply unit 40 for supplying the crushed material to the crusher 30 and the discharge belt conveyor 50 for discharging the crushed crushed material. The power unit 4 is a power source for the traveling unit 10, the crusher 30, the discharge belt conveyor 50, and the like, and includes an engine (not shown), a hydraulic pump driven by this engine, and a control valve for controlling hydraulic oil from the hydraulic pump. And so on. On the upper side of the power unit 4, a traveling lever 4A for performing traveling and turning operations of the mobile crusher 1 and an upper control box (not shown) in which indicators for traveling are arranged are provided. A side control box (not shown) for operating the work machine 3 is provided near the side of the. Further, the crusher 30 side of the power unit 4 (immediately forward of the crusher 30) is a first work floor 28 formed on the upper surface of the power unit 4, and travels on the first work floor 28. Various operations such as operation of the lever 4A, maintenance work of the crusher 30 and inspection work are performed.

For convenience of explanation, the mobile crusher 1 will be described below.
The discharge belt conveyor 50 side is the front side (the right side in FIG. 1), the crushed material supply section 40 side is the rear side (the left side in FIG. 1), and the direction orthogonal to the front-back direction (the left-right direction in FIG. 2).
Each part will be described with the horizontal direction as.

The traveling unit 10 is provided on a crawler frame 22 forming a part of the frame 20, and a hydraulic motor 11 is provided on the front side of the crawler frame 22. Sprocket 11A of hydraulic motor 11 and idler 1 on the other end side
An endless track crawler belt 13 driven by the hydraulic motor 11 is wound around 2. The hydraulic motor 11 is driven by the hydraulic pressure from the hydraulic pump of the power unit 4 via the control valve.

The frame 20 includes a pair of the crawler frames 22 and a main frame 21 to which the crawler frames 22 are attached. A flat crushing device mounting portion 211 is provided on a part of the main frame 21.
(FIG. 4) is provided, and the crusher 30 is mounted on the crushing device mounting portion 211. Further, on the main frame 21, a hopper frame 23 for mounting the crushed material supply unit 40 and an engine frame 24 for mounting the power unit 4 are fixed.

As shown in FIGS. 4 and 5, the crusher 30 has a case 31 having an inlet 31A for the material to be crushed. Inside the case 31, a rotor body 321 and a striking plate (striking portion) 322 are provided. From the rotor (rotating body) 32 and the rotation locus A at the tip of the striking plate 322, clearances C1, C2, C3 are formed.
And a repulsion plate 33 positioned with a space therebetween. In the crusher 30 as described above, the crushed object input from the input port 31A is hit by the rotating hitting plate 322,
When it is hit, it is blown and crushed by colliding with the repulsion plate 33, and is crushed and discharged from the discharge port 31B on the bottom surface side of the case 31 onto the discharge belt conveyor 50 and discharged.

The crushed material supply section 40 is provided with a hopper 41 into which the crushed materials are loaded, and a grizzly feeder 42 which is arranged below the hopper 41 with a slight gap. The hopper 41 is supported on the hopper frame 23 of the frame 20 via four-sided support portions 411, and greatly expands upward. The feeder 42 is a vibration type having a vibration device 421 that is driven by hydraulic pressure from the power unit 4, is supported on the hopper frame 23 via a plurality of coil springs 422, and does not come into contact with the hopper 41. Vibrates and sends the crushed material to the crusher 30 side. At this time, the ends of the hopper 41 and the feeder 42 are
As shown by the chain double-dashed line in FIG. 4, the crushed material is swallowed in the inlet 31A of the crusher 30 and the crushed material is crushed by the crusher 3.
It is surely thrown into 0. Further, the feeder 42 has a function of supplying the crushed material to the crusher 30, and a function of selecting a small input material that does not need to be crushed by the comb-shaped grizzly portion 423 (FIG. 3) and sieving it downward. . The sieved input material is dropped onto another belt conveyor 43 shown in FIGS. 1 to 3 and discharged, or is dropped onto a discharge belt conveyor 50 by switching a damper (not shown), and together with the crushed material. Is discharged.

The discharge belt conveyor 50 has a base end side (the left side in FIG. 1) in the transfer direction located below the frame 20, and crushed substances discharged from the discharge port 31B of the crusher 30 and, if necessary, The discharge from the grizzling part 423 (same as the above-mentioned input) is at the tip side (right side in FIG. 1).
Transfer to. Further, the discharge belt conveyor 50 has a three-stage folded structure, and the discharge height at the tip end side is sufficiently secured, and the work can be reliably performed without the secondary belt conveyor.
The discharge belt conveyor 50 is also driven by the hydraulic pressure from the power unit 4. A magnetic separator 51 is arranged in the middle of the discharge belt conveyor 50 so as to be supported by the frame 20, and a metal material such as a reinforcing bar that is generated when the concrete mass is crushed is magnetically adhered by a permanent magnet. Discharge.

[Description of Crusher] The crusher 30 will be described below in detail with reference to FIGS. 4 and 5. The case 31 of the crusher 30 is a split type having a fixed case 70 fixed to the frame 20 (FIG. 1) and a movable case 80 attached to the upper side of the fixed case 70,
The rotor 32 is arranged in the fixed case 70, and the repulsion plate 33 is attached to the movable case 80 as shown in FIG.

The fixed case 70 is open at the entire upper side,
In addition, it has a box shape having the above-mentioned discharge port 31B on the bottom side, and both sides in the lateral direction are fixed case side side surface portions 72. Two inspection doors 7 are provided on each of the side surfaces 72 of each fixed case.
20, 721 (only one side surface 72 of the fixed case is shown) are provided, and these inspection doors 720, 721 are provided.
Open the case to inspect the inside of the case 31 or the case 3
It is possible to check the clogging condition of the crushed material at the discharge port 31B on the bottom side of 1. However, the size, number, etc. of the inspection doors may be arbitrarily determined in the implementation.

On the other hand, the movable case 80 is the fixed case 70.
Is a lid-shaped member provided so as to cover the upper opening of the movable case 80, and a part of the insertion port 31A is formed by the rear edge of the movable case 80 itself. Both sides of the movable case 80 in the lateral direction are side surfaces 82 of the movable case side. Each movable case side surface portion 82 is located outside the fixed case side surface portion 72 of the fixed case 70, and the lower edge 821 of the movable case side surface portion 82.
The part is the upper edge 72 which is the upper side of the fixed case side surface part 72.
It is provided with four parts swallowed. That is, in the case 31 of the present embodiment, the upper edge 724 portion and the lower edge 821.
The portions are overlapped in the lateral direction, and the dividing line SS of the fixed case 70 and the movable case 80 is provided along the overlapped portion.

These fixed case 70 and movable case 80
Are connected by a rotating mechanism 39 provided on the upper side opposite to the inlet 31A, and the movable case 80 is fixed around the rotating shaft of the rotating mechanism 39.
With respect to the above, it is rotated upward and opened, or the lower edge 821 deeply sinks downward until it comes into contact with the contact portion 725. That is, the state shown by the solid line in FIG. 4 is the working posture of the movable case 80, and the crushing work is performed in this posture. Further, as shown by the chain double-dashed line, the movable case 80 in the opened state is the movable case 80 maintenance posture, and the reversal work and the replacement work of the repulsion plate 33 (331, 332, 333) exposed by opening the movable case 80 can be performed. Done. Then, the state in which the movable case 80 is depressed is the transportation posture of the movable case 80,
By sinking, the height of the whole case 31 becomes low, and it corresponds to the height limitation when transporting the mobile crusher 1 by the trailer.

Further, the fixed case 70 and the movable case 80
Is a little closer to the insertion port 31A side than the rotating mechanism 39,
They are connected by a hydraulic cylinder 394. The hydraulic cylinder 394 operates when the movable case 80 rotates, and assists the rotating operation of the movable case 80, which becomes heavy. Such a hydraulic cylinder 394 is arranged such that the upper side is a cylinder and the lower side is a rod, and dust and the like are prevented from accumulating on the rod-side end of the cylinder, and durability of packing and the like is improved. Has been.

The rotor 32 of the crusher 30 is supported at both lateral ends by bearings (not shown) outside the case 31.
A pulley 34 is provided on one end side. A hydraulic motor 35 indicated by a chain double-dashed line is arranged outside the case 31, and a V-belt 37 is wound around the pulley 36 and the pulley 34 of the hydraulic motor 35. That is, the rotor 32 is rotationally driven by the hydraulic motor 35 via the V belt 37. The hydraulic motor 35 is also driven by the hydraulic pressure from the hydraulic pump of the power unit 4 via the control valve.

The striking plates 322 of the rotor 32 are continuously provided in the lateral direction (the axial direction of the rotor body 321) over a range slightly narrower than the lateral width of the case 31, and are equidistant in the circumferential direction of the rotor body 321. A plurality of sheets (four sheets in this embodiment) are provided in a protruding manner. Further, the striking plate 322 is detachable and can be used by being inverted or replaced with a new striking plate according to its wear state.

Next, referring to FIG. 5, the repulsion plate 33 of the crusher 30 has a first repulsion plate 331 and a second repulsion plate 3 in this order from the insertion port 31A (FIG. 4) side along the rotation direction of the rotor 32.
32 and the third repulsion plate 333.

Since the first repulsion plate 331 is larger than the others, it is possible to reliably receive a large crushed object at the beginning of charging. A pair of locking projections 331A is provided on the back surface side of the first repulsion plate 331, and the locking projections 331A are provided.
Is locked between the locking parts 334A on the lower side of the first arm 334, and is also provided on the lateral side end part with a screw type fixing tool 334B provided on one locking part 334A. It is held by a stopper 334C. A plurality of such first repulsion plates 331 are arranged side by side in close contact with each other in the lateral direction, and by releasing the fixing members 334B and the stoppers 334C, each of them can be inserted and removed in the lateral direction, and the worn state thereof. It is used by reversing or replaced with a new repulsion plate.

The second and third repulsion plates 332 and 333 have the same shape, and the locking portion 3 provided on the lower side of the second arm 335 via the locking projections 332A and 333A on the rear surface side.
Fixture 335B and stop 33 between 35A, respectively.
Hold at 5C. These second and third repulsion plates 332,
The 333 can also be inserted into and removed from the second arm 335 and is replaced depending on the wear state. However, the second and third repulsion plates 332 and 333, which are not so large, are not used by reversing because they are uniformly worn by the crushing work, but like the first repulsion plate 331, they are reversed. It may be configured to be possible.

A pair of the first and second arms 334 and 335 are arranged side by side in the lateral direction with a space therebetween, respectively, and connecting plates 334D and 335D and connecting bars 334E and 334E, respectively.
They are integrally connected at 335E. Further, each second arm 335 is arranged inside the pair of first arms 334. The upper sides of the first and second arms 334 and 335 are both pivotally supported above the inside of the case 31 by a rotating shaft 38. On the other hand, the lower sides of the first and second arms 334 and 335 are suspended by the retractable first and second gap adjusting devices 60 (61, 62) attached to the connecting bars 334E and 335E. There is.

The first and second gap adjusting devices 61,
Reference numeral 62 denotes a structure that expands and contracts by driving the hydraulic motor 64 of the drive unit 63 on the upper end side, and as described later, a screw type having a nut-shaped member and a bolt-shaped member is adopted. By expanding and contracting the first and second gap adjusting devices 61 and 62, the first and second arms 334 and 335 rotate about the rotation shaft 38, and the rotation locus A of the tip of the striking plate 322 and the first to second. Each gap C1 between the third repulsion plates 331 to 333
It is possible to adjust the sizes of C2 and C3.

In the second gap adjusting device 62, the second,
Of the third repulsion plates 332 and 333, the gap C3 at the third repulsion plate 333 is adjusted. This is because adjusting the clearance C3 is important in determining the final particle size of the crushed material. Therefore, the adjustment of the gap C2 at the second repulsion plate 332 provided on the same second arm 335 is performed by the second and third adjustments.
Due to the mutual positional relationship between the repulsion plates 332 and 333, the gap C3
Adjust it to complete automatically.

Further, the first arm 334 is provided with a bending type restriction link 336 in order to restrict the amount of rotation of the first gap adjusting device 61 in the extending direction. The restriction link 336 prevents the first gap adjusting device 61 from excessively extending and restricts the rotation amount of the first arm 334. On the other hand, the rotation amount of the second arm 335 is restricted by the contact with the first arm 334. Furthermore, the first
In the arm 334, above the first repulsion plate 331,
A liner 337 that is also insertable and removable is attached,
The first arm 334 is protected from crushed objects and the like.

In the crusher 30 described above, one side of the fixed case 70 on the side of the fixed case 72 is located above the pulley cover 75 and at the same height level as that of the first work floor 28. 29 are provided.
The second work floor 29 includes a side surface portion 72 on the fixed case side.
It is composed of a scaffolding plate-shaped member extending in the front-rear direction and is fixed to the side surface portion 72 of the fixed case by bolts or the like. Further, the front end side of the second work floor 29 is close to the first work floor 28, and each work floor 28, 29 is formed along two sides forming an angle of a crusher 30 having a substantially square plane. The work floors 28 and 29 can be easily moved back and forth.

From such a second work floor 29,
When the movable case 80 is in the maintenance posture, it can easily enter the crusher 30 by straddling the fixed case 70, and by straddling the front end sides (the input port 31A side) of the hopper 41 and the feeder 42. Four
It is possible to easily move into the feeder 1 and move it onto the feeder 42.

[Detailed Description of Gap Adjusting Device]
The gap adjusting device 60 will be described in detail with reference to FIG.
Since the first and second gap adjusting devices 61 and 62 have the same configuration, both of them will be described here as the gap adjusting device 6.
It will be described as 0. In FIGS. 5 and 6, the gap adjusting device 60 includes the drive unit 63 described above and the rod-shaped advancing / retreating unit 65 driven by the drive unit 63.

The drive unit 63 is mounted on a mounting seat 805, which is bolted to the upper surface of the movable case 80, via a pair of disc springs 806 stacked vertically, and on the disc spring 806. The pedestal 631 is provided. Cradle 631
Is provided with an insertion hole 631A concentric with the insertion holes 81A, 805A formed in the movable case 80 and the mounting seat 805, and the advancing / retreating part 65 is inserted in these insertion holes 81A, 805A, 631A.

The drive unit 63 also includes an exterior case 632 provided on the pedestal 631. Exterior case 63
2 includes a housing portion 632A that houses the upper end side of the advancing / retreating portion 65.
6 is provided in the accommodation portion 632A.
As indicated by the chain double-dashed line in the VI cross section, a cylindrical gear 633 having a hollow portion 633A having a hexagonal cross section is rotatably arranged. As shown in this cross-sectional view, a flat hexagonal fitting portion 661 provided in the advancing / retreating portion 65 is fitted in the hollow portion 633A of the cylindrical gear 633, and the cylindrical gear 633 rotates. By doing so, the advancing / retreating portion 65 side also rotates.

This cylindrical gear 633 is a gear 6 having a smaller diameter.
34, and the gear 634 is connected to the rotary shaft of the hydraulic motor 64. Therefore, the advancing / retreating portion 65 is rotationally driven by the hydraulic motor 64. At this time, the hydraulic motor 64
The rotation of is decelerated between the gear 634 and the cylindrical gear 633 and transmitted to the advancing / retreating portion 65. The meshing portion of the cylindrical gear 633 and the gear 634 is lubricated with the lubricating oil injected into the outer case 632.

Further, the exterior case 632 is attached to the attachment seat 805, that is, the movable case 80 via an attachment piece 635 having an L-shaped vertical cross section provided on the lower surface thereof. At this time, the horizontal portion of the mounting piece 635 is sandwiched by a pair of upper and lower rubber members 636 and 637 as elastic members, and the mounting piece 635 and the rubber members 636 and 637 are sandwiched.
It is attached by using a sleeve 638 and a bolt 639 which pass through. Although only one place is shown in FIG. 6 for the mounting portion having the rubber members 636 and 637, in reality, the position facing each other with the center of rotation of the cylindrical gear 633 (advancing / retracting portion 65) interposed therebetween is shown. Is also provided in the drive unit 63
Are attached to the movable case 80 at two positions.

On the other hand, the advancing / retreating portion 65 is a nut member 66 attached to the movable case 80 side as a case side member.
And the connection bars 334E and 335 whose lower end side is the repulsion plate 33 side.
Bolt member 6 attached to E as a repulsion plate side member
And a threaded portion 67A engraved on the bolt member 67.
Is screwed to a threaded portion 66A formed on the inner surface of the nut member 66.

The above-mentioned fitting portion 661 is provided on the upper side of the nut member 66, and as shown in the transverse sectional view in FIG. 6, it has a flat hexagonal shape which is slightly smaller than the fitting portion 661. The operation unit 662 is attached by welding or the like of another member. The operation portion 662 can be fitted with a hand tool such as a box wrench by removing the detection plate 691 bolted to the upper portion thereof.
It is possible to rotate the nut member 66 manually.

The bolt member 67 is attached to the connecting bars 334E and 335E via the joint member 671 on the lower end side thereof, and the joint member 671 and the upper mounting seat 80 are attached.
A cover member 68 for covering a portion of the advancing / retreating portion 65 inserted into the case 31 is provided between the cover member 68 and the casing 5.

The cover member 68 is the joint member 6
71, a lower cylindrical portion 681 fixed to 71, and a mounting seat 805.
This is a structure in which an upper bellows-shaped stretchable portion 682 fixed to the above is joined. Cylindrical portion 68 that moves forward and backward together with the bolt member 67
The upper end side of No. 1 is in close contact with the outer peripheral surface of the nut member 66 via an annular seal material 683. The lengths of the cylindrical portion 681 and the bolt member 67 are set to be substantially the same,
Within the range (stroke) in which the bolt member 67 can move forward and backward, the seal material 683 is always in close contact with the outer peripheral surface of the nut member 66, and prevents dust, water, etc. from entering the cylindrical portion 681.

The advancing / retreating portion 65 is provided in the movable case 80.
And insertion holes 81A, 805A, 631A of the drive unit 63
And its own weight is received by the receiving base 631 of the drive unit 63 via the nylon pad 631B. Therefore, the advancing / retreating part 65 is not fixed to any part in the insertion direction, and a large crushed object violently collides with the repulsion plate 33, or the repulsion plate 33 and the striking plate 322 collide. In the event of an abnormality such as a gap, the fitting portion 661 causes the pedestal 63 to
The entire advancing / retreating portion 65 is pushed upward so as to be separated from 1. However, the push-up of the advancing / retreating part 65 does not occur frequently during the crushing work, but is a phenomenon at the time of abnormality to the last, and it is a conventional rod returning phenomenon that occurs when the advancing / retreating part 65 is configured by a hydraulic cylinder. Is different. In addition,
The advancing / retreating portion 65 whose thrust has been eliminated returns downward due to its own weight, the weight of the repulsion plate 33, the weights of the first and second arms 334, 335, etc., but the impact at that time is absorbed by the pair of disc springs 806. It is supposed to be done.

According to the gap adjusting device 60 described above, when the nut member 66 of the advancing / retreating portion 65 is rotated by the hydraulic motor 64, the bolt member 6 attached to the repulsion plate 33 side.
7 does not rotate, but moves forward and backward without permission in accordance with the rotation amount and rotation direction of the nut member 66, and the forward and backward movement of the bolt member 67 causes the repulsion plate 33 to move toward the first and second arms 334 and 335.
It moves (rotates) via.

The clearance adjustment by the movement of the repulsion plate 33 is automatically performed by the control means (not shown) controlling the hydraulic motor 64. More specifically, the gear 634 has a disc-shaped detection plate 69 having a plurality of notches in the circumferential direction.
2 is provided, and the rotation amount detection sensor 6 that detects a cutout portion of the rotating detection panel 692 and outputs a detection signal to the control means each time the cutout portion passes is provided on the outer case 632.
93 is provided.

The control means considers the reduction ratio between the gear 634 and the cylindrical gear 633, the screw pitch of the meshing portion of the advancing / retreating portion 65, the correction coefficient, etc., based on the number of times the detection signal from the rotation amount detecting sensor 693 is input. Then, the amount of advance / retreat of the bolt member 67, and by extension, the amount of movement of the repulsion plate 33 is calculated, and the hydraulic motor 64 is rotated in the forward or reverse direction until the amount of movement reaches a desired amount of movement input in advance. . Such control is performed by a program executed in the control means.

That is, for example, when it is desired to make the particle size of the crushed material larger, a desired movement amount is input so as to separate the repulsion plate 33 from the striking plate 322, and the particle size of the crushed material is made smaller. , A desired amount of movement may be input so that the repulsion plate 33 approaches the striking plate 322, and the repulsion plate 33 moves by the input movement amount,
The clearances C1 to C3 between the striking plate 322 and the striking plate 322 are adjusted without permission.

By the way, when the bolt member 67 is advanced to bring the repulsion plate 33 closer to the striking plate 322 side, the repulsion plate 3
3 contacts the striking plate 322 and the rotor body 321. In such a case, when the hydraulic motor 64 is rotated to further advance the bolt member 67, the bolt member 67 is moved.
Does not advance, but on the contrary, the nut member 66 side moves upward and is pushed up. This is the advance / retreat unit 65, as described above.
Only the whole is inserted into the drive unit 63,
This is because it is not fixed.

Therefore, the gap adjusting device 60 according to the present embodiment.
Then, the position of the detection plate 691 provided at the upper end of the bolt member 67 is detected by the protrusion detection sensor 694 attached via the bracket 807, and the forward / backward movement portion 65 is pushed up. It is supposed to be detectable. Based on the output from the bump detection sensor 694, the control means recognizes that the repulsion plate 33 is in contact with the striking plate 322 or the rotor body 321, and automatically stops the rotation of the hydraulic motor 64.

The output from the bump detection sensor 694 is used, for example, to set the zero point of the repulsion plate 33. That is, when adjusting the clearances C1 to C3 between the repulsion plate 33 and the striking plate 322 by a predetermined amount from the rotation locus A of the striking plate 322, the repulsion plate 33 is temporarily moved to the striking plate 322 or the rotor. After abutting against the main body 321, the repulsion plate 33 is gradually returned to match the position of the rotation locus A, and this position is set to the zero point position of the repulsion plate 33. Such a zero point setting is also automatically performed by a program executed in the control means, but at this time, in order to recognize the contact between the repulsion plate 33 and the striking plate 322 or the rotor body 321, a protrusion is performed. The output from the upper detection sensor 694 is used.

Even when a large crushed object is clogged between the repulsion plate 33 and the striking plate 322, the advancing / retreating portion 65 pushes up, and this state is recognized based on the output from the bump detection sensor 694. In such a case, it is possible to control the drive of the feeder 42 to temporarily stop the supply of the crushed material into the crusher 30.

[Effects of the Embodiment] According to the present embodiment as described above, the following effects can be obtained. (1) The clearance adjusting device 60 installed in the crusher 30 is provided with the advancing / retreating part 65 for moving the repulsion plate 33. The advancing / retreating part 65 uses the nut member 66 and the bolt member 67 in the screw type. Since the structure is such that the nut member 66 side is rotatably driven by the hydraulic motor 64, the repulsion plate 33 attached to the bolt member 67 side can be simply rotated by rotating the nut member 66 in the forward and reverse directions by a necessary amount. It can be moved steplessly, unlike the case of using a conventional hydraulic cylinder,
The gaps C1 to C3 between the striking plate 322 and the repulsion plate 33 can be easily and arbitrarily adjusted.

(2) Further, since the nut member 66 and the bolt member 67 are screwed to each other by their respective screw portions 66A and 67A, when the repulsion plate 33 is stationary,
It does not shift in the moving direction, and the repulsion plate 33 can be reliably held without providing a complicated holding mechanism as in the conventional case, and the sizes of the gaps C1 to C3 can be surely maintained.

(3) Nut member 66 which constitutes the advancing / retreating portion 65
Since the portion of the bolt member 67 accommodated in the case 31 is covered with the cover member 68, the threaded portion of the nut member 66 and the bolt member 67 has dust generated during crushing work and the inside of the case 31. It is possible to prevent water and the like from entering at the time of cleaning, and the advancing / retreating portion 65 can be reliably operated for a long period of time.

(4) In particular, since the cover member 68 is provided with the bellows-shaped expansion / contraction portion 682, the cover member 68 is expanded / contracted in accordance with the forward / backward movement of the bolt member 67 and the upward movement of the forward / backward portion 65. And the nut member 66 and the bolt member 67 can always be covered well, and in this respect also, the advancing / retreating portion 65 can surely function for a long period of time.
The durability and the like of the gap adjusting device 60 can be improved.

(5) Since the drive portion 63 of the gap adjusting device 60 is fixed to the movable case 80 side, the repulsion plate 3 with a large amount of vibration is generated.
The reliability of the drive unit 63 can be improved as compared with the case where the drive unit 63 is mounted on the third side.

(6) The repulsion plate 33 moves in an arc around the rotary shaft 38, and the movement direction thereof is slightly deviated from the linear advancing / retracting direction of the advancing / retreating portion 65, so that the repulsion plate 33 is moved. Then, the advancing / retreating portion 65 tilts, and the fitting portion 6 of the nut member 66
An external force acts on the drive unit 63 via 61 to try to buckle the drive unit 63. However, in the present embodiment, the drive unit 63 allows the movable case 80 to be interposed via the rubber members 636 and 637.
Even if the advancing / retreating portion 65 is slightly inclined due to the movement of the repulsion plate 33 in the rotation direction, the elastic force of the rubber members 636 and 637 absorbs the external force to the driving portion 63 caused by the inclination. Therefore, the buckling of the drive unit 63 can be effectively prevented. Therefore, the fitted state between the drive unit 63 and the fitting unit 661 can be maintained in a good condition, and the power transmission from the drive unit 63 to the nut member 66 can be reliably performed.

(7) Further, since the drive unit 63 is provided outside the movable case 80, the drive unit 63 can be hardly affected by dust and the like, and maintenance of the drive unit 63 is also possible.
Can be easily performed with the closed position (working posture).

(8) The gap between the striking plate 322 and the repulsion plate 33 is automatically adjusted by the control means controlling the hydraulic motor 64 based on the detection signal from the rotation amount detection sensor 693. The operator does not need to manually perform the adjustment while visually observing the adjustment states of the gaps C1 to C3, and the adjustment work can be performed quickly and accurately.

(9) When the repulsion plate 33 is moved to the striking plate 322 side and the repulsion plate 33 collides with the striking plate 322 or the rotor body 321, the advancing / retreating portion 65 is pushed upward,
It is possible to prevent the repulsion plate 33 from biting into the rotor 32, and it is possible to effectively prevent the damage and the like.

(10) Further, even when the repulsion plate 33 (particularly, the first repulsion plate 331) moves largely without contacting the rotor 32 side, the movement is restricted by the regulation link 336.
The bolt member 67 can be prevented from being stretched more than necessary and coming off the nut member 66.

(11) On the other hand, on the upper end of the nut member 66, a hand tool is fitted to rotate the nut member 66.
Since 62 is provided, the nut member 66 can be rotated by the operation of the operation unit 662 even when the drive unit 63, the control unit, or the like does not operate for some reason, and the adjustment of the clearances C1 to C3 can be performed manually. it can.

The present invention is not limited to the above-described embodiment, but includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention.
For example, in the gap adjusting device 60 of the above-described embodiment, the operating portion 662 for manual operation is provided with a flat hexagonal outer shape, but the inner surface is formed into a concave shape with a flat hexagonal shape. In such a case, a hand tool such as a convex wrench is fitted in the concave portion and the nut member 66 is rotated. Further, the shape of the portion on which the hand tool is applied may be any shape, and is not limited to the hexagonal shape. For example, the shape thereof may be a polygon other than a hexagon, and a wrench having an engaging portion that engages with each cylindrical hole by forming a circular cylindrical hole at the apex position of a triangle. It may be operably provided. Furthermore, such an operation unit 662 is not an essential component of the present invention, and even when it is not provided, it is included in the inventions of other claims except the invention of Claim 4.

In the cover member 68 of the above-mentioned embodiment, the lower end of the cylindrical portion 681 is fixed to the joint member 671, but this cylindrical portion 681 is constructed so as to cover the joint member 671 as well, and its lower end is the first Second arm 334
It may be fixed to 335. Further, although the upper end of the expansion / contraction part 682 is fixed to the mounting seat 805, the insertion holes 805A and 631A of the mounting seat 805 and the pedestal 631 are made larger, and the expansion / contraction part 682 is connected to the fitting part of the nut member 66. 66
1 You may make it contact a lower surface etc. In short, the cover member 6
The structure 8 may be any structure as long as it covers the part of the advancing / retreating part 65 housed in the case 31, and the specific structure and the like may be arbitrarily decided upon the implementation. However, the stretchable part 6
By fixing the upper end of 82 to the mounting seat 805, the mounting seat 8
Since the insertion hole 805A of 05 is covered, it is possible to prevent dust and water from leaking out of the insertion hole 805A and the like to the drive unit 63 side outside the case 31, and enter between the pair of disc springs 806 to adversely affect the function. It can be prevented from affecting. Therefore,
As in the previous embodiment, it is preferable to fix the upper end of the expandable portion 682 to the fixed case 80 side instead of the nut member 66.

In the above embodiment, the drive unit 63 of the gap adjusting device 60 is provided outside the case 31, but it may be provided inside the case 31. However, since it is possible to obtain the effect of (7) described above, it is desirable to provide the drive unit 63 outside the case 31.

Further, in the advancing / retreating unit 65 of the above embodiment,
The nut member 66 is provided on the movable case 80 side, and the bolt member 67 is provided.
Were attached to the repulsion plate 33 side, respectively, but these may be reversed. That is, the nut member 66 is attached to the repulsion plate 33 side, and the bolt member 67 is attached to the movable case 8.
It may be attached on the 0 side and is optional.

Although the advancing / retreating portion 65 of the above-described embodiment is a screw type in which the nut member 66 and the bolt member 67 are screwed together, the gap adjusting device of the present invention is not limited to this. For example, the case side member according to the present invention may be configured by a pinion gear that is rotationally driven, and the repulsion plate side member may be configured by a rack that meshes with the pinion gear. Further, in the case of a gear type using a rack and a pinion, the rack side may be formed into an arc shape along the movement locus of the repulsion plate 33. By doing so, even if the repulsion plate 33 moves, the mutual meshing positions are displaced. There is no worry, and the structure of the meshing part can be simplified. Further, such an arcuate rack may be fixed to the inner surfaces of both side surfaces 72 of the fixed case 70 in the fixed case 70, and pinion gears may be rotatably provided at both lateral ends of the repulsion plate 33 side. Good. In this case, by rotating the pinion gear, the pinion gear itself rolls on the rack, and the repulsion plate 33 moves. Even with the above configuration, the repulsion plate 33 can be moved to the floor without permission, and the repulsion plate 33 does not easily shift during the crushing work, so that the object of the present invention can be achieved.

The gap adjusting device 60 includes the first and second arms 3
Since it is necessary to rotate 34 and 335 individually, the first gap adjusting device 61 and the second gap adjusting device 62 are configured, but when the number of arms is one, the gap adjusting device 60 is also one. Of course, when the number of arms is three or more, three or more gap adjusting devices 60 may be provided, and the number of gap adjusting devices 60 may be appropriately determined in consideration of the number of arms and the like.

The mobile crusher 1 of the above-described embodiment is a self-propelled type equipped with the crawler type traveling unit 10, but it is not limited to the crawler type and may be a wheel type or a self-propelled type. Not limited to this, it may be a tow type. In short, if it is movable, it is included in the mobile crusher of the present invention.

The impact crusher of the present invention is not limited to the one mounted on the mobile crusher 1, and may be, for example, a stationary type installed in a dedicated crushing site.
Even in such a case, the object of the present invention can be achieved by making the gap adjusting device 60 a screw type or a gear type.

In addition, the frame 20 and the crushed material supply unit 4
0, the configuration of the discharge belt conveyor 50 and the like, as well as the specific shapes of the case side member, the repulsion plate side member, the rotating body, the striking part, etc. can be arbitrarily changed within the range in which the object of the present invention can be achieved. However, the present invention is not limited to the above-mentioned embodiments and modifications.

[0074]

[Brief description of drawings]

FIG. 1 is a side view showing a mobile crusher equipped with an impact crusher according to an embodiment of the present invention.

FIG. 2 is a view of the mobile crusher as seen from a side of loading an object to be crushed.

FIG. 3 is a plan view showing the mobile crusher.

FIG. 4 is a side view showing a state where a movable case forming the case of the impact crusher is in a working posture.

FIG. 5 is a sectional view showing a part of the internal structure of the impact crusher.

FIG. 6 is a sectional view showing a gap adjusting device of the impact crusher.

[Explanation of symbols]

30 ... Impact crusher, 31 ... Case, 32 ... Rotor which is a rotating body, 33, 331, 332, 333 ... Repulsion plate, 60 ... Gap adjusting device, 63 ... Drive part, 66 ... Nut member which is case side member, 67 ... Bolt member which is a member on the repulsion plate side, 68 ... Cover member, 70 ... Fixed case, 8
0 ... Movable case, 322 ... Strike plate which is a striking part, 636
... Rubber material which is an elastic member, 662 ... Operating portion, 682 ...
Expandable parts, C1, C2, C3 ... Gap.

Continued front page    (72) Inventor Shuji Yoshida             3-20-1 Nakase, Kawase-ku, Kawasaki-shi, Kanagawa             Ceremony Company Komatsu Manufacturing Development Division Construction Machinery 3rd Development Center             Inside (72) Inventor Yuji Ozawa             3-20-1 Nakase, Kawase-ku, Kawasaki-shi, Kanagawa             Ceremony Company Komatsu Manufacturing Development Division Construction Machinery 3rd Development Center             Inside F-term (reference) 4D065 AA06 BB07

Claims (4)

[Claims] 1. A gap adjusting device for an impact crusher (30), wherein a rotary body (32) having a striking part (322) and gaps (C1, C2, C3) with respect to the striking part (322) are arranged. A repulsion plate (33), a case (31) to which the rotating body (32) and the repulsion plate (33) are attached, a repulsion plate side member (67) attached to the repulsion plate (322) side, Case side member (66) screwed or meshed with the repulsion plate side member (67) and attached to the case (31)
And a drive unit (6) for rotationally driving the case side member (66).
3) and the gaps (C1, C) between the striking part (322) and the repulsion plate (33) according to the amount of rotation of the case side member (66).
2, C3) are configured to be adjustable, the gap adjusting device (6) for the impact crusher (30)
0). 2. The gap adjusting device (60) for an impact crusher (30) according to claim 1, wherein the repulsion plate side member (67) in a screwed or meshed state.
The case-side member (66) is covered with a cover member (68) having an expansion / contraction portion (682) at least partially, and both ends of the cover member (68) in the expansion / contraction direction are on the repulsion plate (33) side. And a gap adjusting device (60) for the impact crusher (30), which is attached to the case (31) side. 3. A gap adjusting device (6) for an impact crusher (30) according to claim 1 or 2.
0), the drive unit (63) is configured to rotate the case side member (66) and is attached to the case (31) via elastic members (636, 637). A gap adjusting device (60) for the impact crusher (30). 4. A gap adjusting device (6) for an impact crusher (30) according to any one of claims 1 to 3.
0), the case side member (66) is rotated by the drive section (63) and is operated by a tool.
A gap adjusting device (60) for an impact crusher (30), which is provided with 2) and is configured to be rotatable even by manually operating the operating portion (662).