JP4081500B2 - Impact crusher and striking plate used in this impact crusher - Google Patents

Description

  The present invention relates to an impact crusher (impact crusher) used for crushing raw stones in a quarry, crushing concrete waste, and a striking plate used in this impact crusher, and more particularly, to a mounting technology of a striking plate to a rotor. .

  The impact type crusher includes a casing, a rotor having a striking plate projecting from a front end surface of a rotor disk, and a repulsion plate disposed around the rotor, and the object to be crushed supplied in the casing It is formed so as to be crushed by the crushing operation by hitting the striking plate and repelling the repellent plate.

In order to increase the striking force, one method is to increase the collision speed of the striking plate. However, the higher the speed, the greater the centrifugal force acting on the striking plate, and the mechanical strength becomes a problem.
Recently, for the purpose of crushed sand, high speed rotating impact crushers have been found.

In the case of the same trajectory and the same object, the centrifugal force has a force that is a square of the rotation speed ratio as the rotation speed increases.
A general impact-type crusher is about 25 m / s in terms of speed at the peripheral edge, but a high-speed impact-type crusher may exceed 60 m / s.

  The present invention mainly relates to a mounting technique for a striking plate that can cope with high-speed rotation, but is not limited to a high-speed impact crusher, and can be applied to a general impact crusher. is there.

2. Description of the Related Art Conventionally, as a structure for attaching a striking plate to a rotor, a projecting portion is formed on the striking plate (see Patent Document 1).
In general, impact-type crusher striking plates are manufactured from wear-resistant alloy castings, but these castings, unlike steel plates, tend to have uneven quality and variations, and are particularly safe during high-speed rotation. Guaranteeing sex becomes difficult.
When attaching the striking plate to the rotor, the conventional structure that hooks the convex part can only obtain a fixing force that supports the pulling force of the striking plate due to centrifugal force, especially when it is accompanied by high-speed rotation. There was a problem that a sufficient fixing force could not be obtained.
JP 2001-190972 A

  In the present invention, when the striking plate is attached to the rotor disk, the wedge is used to support the pulling force of the striking plate due to the centrifugal force, and at the same time, the centrifugal plate is used to compress the striking plate in the direction of clamping. The first object is to provide an impact crusher that can be fastened and fixed so that the striking plate can be securely and firmly attached to the rotor disk even at high speed rotation. A second problem is to provide an impact plate for use in the crusher.

In order to solve the first problem, the impact crusher of the present invention (Claim 1) is:
A casing (1), a rotor (3) to which a striking plate (4) is attached, and a repulsion plate (2) disposed around the rotor (3) are supplied into the casing (1). An impact-type crusher that crushes the object to be crushed by crushing operation by striking the striking plate (4) and repulsion plate (2),
The rotor (3) includes a rotor shaft (30), two rotor disks (31, 31) attached to the rotor shaft (30) in an opposed state, and the two rotor disks (31, 31). ) Formed with a striking plate (4) mounted in a state passed between,
A notch groove (32, 32) for attaching a striking plate (4 ) is formed at the tip of each rotor disk (31, 31) ,
The notch groove (32, 32) has a striking plate receiving port (32c, 32c) for receiving and fitting the striking plate (4) from the radial line (R) direction passing through the rotor center (C). An opening is formed in the front end surface of the disk (31, 31),
When the wedge fitting portion (32a) is formed in the notch groove (32), the groove width gradually narrows as the radius from the rotor center (C) increases in the wedge fitting portion (32a). A wedge receiving surface (33) is formed,
The striking plate (4) is formed in a substantially rectangular shape that is long in the facing direction of the rotor disk (31, 31), and striking plate side locking portions (40) are formed at both side ends thereof,
A wedge surface (50) that is in contact with the wedge receiving surface (33) of the notch groove (32) is formed on one surface, and a wedge side locking portion (on the other surface) that engages with the striking plate side locking portion (40). 51) formed with a wedge (5) is detachably fitted between the wedge receiving surface (33) and the striking plate (4) from the axial direction of the rotor (3),
The wedge (5) receives the centrifugal force accompanying the rotation of the rotor (3), and the wedge (5) is compressed and tightened in the direction of clamping the striking plate (4) by the wedge action of the wedge surface (50) and the wedge receiving surface (33). It was set as the structure formed so that it could fix.

In order to solve the second problem, the striking plate used in the impact crusher of the present invention (Claim 2) is:
It is a striking board (4) used for the impact type crusher of Claim 1, Comprising: The said striking board side latching | locking part (40) is formed in both surfaces in the center part of the both ends of this striking board (4), The tip side and the back end side are formed symmetrically around the striking plate side locking portion (40),
And it was set as the structure formed so that attachment or detachment with respect to the notch groove (32) of a rotor disk (31) was carried out by attachment or detachment of the said wedge (5).

The impact type crusher of the present invention (Claim 1) uses the wedge to attach the striking plate to the rotor disk, so that it supports the pulling force of the striking plate due to the centrifugal force and at the same time utilizes the centrifugal force. It is possible to compress and clamp in the direction of clamping.
As a result, the striking plate can be securely and firmly attached to the rotor disk even at high speed rotation.

Since the impact plate (Claim 2) used in the impact type crusher of the present invention is formed symmetrically with respect to the engaging portion, the distal end side and the far end side are formed symmetrically. The end side can be reversed and used.
And when it is used in reverse or replaced with a new impact plate, it can be easily attached to and detached from the notch groove of the rotor disk by attaching and detaching the wedge, which improves the efficiency of attaching and detaching the impact plate. it can.

  1 is a side view showing a rotor of an impact crusher in the embodiment of the present invention, FIG. 2 is a perspective view showing a rotor of the impact crusher in the embodiment of the present invention, and FIG. 3 is an impact crusher of the embodiment of the present invention. It is front sectional drawing which shows the outline of this.

In FIG. 3, reference numeral 1 denotes a casing, which is formed in a rectangular box shape in plan view, in which an input port 10 for an object to be crushed is formed, and a discharge port 11 is formed at the lower end.
A repulsion plate 2 is attached to the inside of the casing 1 so as to be disposed around a rotor 3 to be described later.

Inside the casing 1, a rotor 3 having a striking plate 4 attached to the outer periphery is incorporated.
As shown in FIGS. 1 and 2, the rotor 3 includes a rotor shaft 30, two rotor disks 31, 31 attached to the rotor shaft 30 in an opposed state, and the two rotor disks 31, The striking plate 4 is mounted so as to be passed between the striking members 31, and the striking plate 4 is mounted so as to protrude outward from the tip of the rotor disk 31.

  The attachment structure of the striking plate 4 to the rotor disk 31 is such that both side ends of the striking plate 4 are detachably attached to the notch groove 32 formed on the outer periphery of the rotor disk 31 via the wedge 5. Yes.

  The striking plate 4 is formed in a substantially rectangular shape that is long in the opposing direction of the rotor disks 31, 31, and a concavo-convex surface 40 as a striking plate side locking portion is formed on both sides of the center portion on both sides thereof. The front end side and the back end side are formed symmetrically with 40 as the center.

As shown in FIG. 1, the notch groove 32 is formed at the tip of each rotor disk 31 on a radial line R passing through the rotor center C.
The notch groove 32 is formed with a striking plate receiving port 32 c for receiving and fitting the striking plate 4 from the direction of the radial line R passing through the rotor center C, opening at the front end surface of the rotor disk 31.
In the notch groove 32, when the wedge fitting portion 32a is formed by opening at the front end surface, a back groove portion 32b is formed from the bottom of the wedge fitting portion 32a to the inside.
A wedge receiving surface 33 is formed in the wedge fitting portion 32a so that the groove width gradually becomes narrower as the radius from the rotor center C increases.

  The wedge 5 is formed with a wedge surface 50 that contacts the wedge receiving surface 33 of the notch groove 32 on one side, and a convex / concave surface 51 (wedge side) that engages with the concave / convex surface 40 (striking plate locking portion) on the other surface. (Locking portion) is formed, and is detachably fitted between the wedge receiving surface 33 and the striking plate 4 from the axial direction of the rotor 3.

A protector 6 is detachably attached to the rotor disk 31 by a fixing pin 61 so as to cover the respective leading end portions.
In this case, the protector 6 is formed so as to cover the front end surface of the rotor disk 31, the outer surface of the front end portion, both side surfaces of the front end portion, and the front end surface and both side surfaces of the wedge 5. With the protectors 6 and 6 covered, the fixing pins 61 and 61 are respectively inserted so as to be inserted into both the protectors 6 and 6. In addition, both protectors 6 and 6 can be fixed by using one fixing pin as a common fixing pin.

The procedure for attaching the striking plate 4 to the rotor disk 31 is to first fit both end portions of the striking plate 4 into the notch grooves 32, 32 formed in the rotor disks 31, 31 from the striking plate receiving port 32c. At this time, the rotor 3 is positioned so that the striking plate receiving port 32c of the notch groove 32 faces directly upward, and in this state, the striking plate 4 lifted by a wire rope or the like is gradually lowered and fitted into the back groove portion 32b.
That is, the striking plate 4 is fitted into the notch groove 32 from the striking plate receiving port 32c from the radial line R direction passing through the rotor center C.

Next, the wedge 5 is fitted to the wedge fitting portion 32a of the notch groove 32. In this case, the wedge surface 50 of the wedge 5 is brought into surface contact with the wedge receiving surface 33 of the notch groove 32, and the uneven surface of the wedge 5 is provided. The wedge 5 is fitted into the wedge fitting portion 32 a from the axial direction of the rotor 3 so that 51 is engaged with the uneven surface 40 of the striking plate 4.
In this way, after the striking plates 4 are attached to both ends of the rotor disk 31, the protector 6 is put on the tip of the rotor disk 31 and fixed by the fixing pins 61.

In addition, when the front-end | tip part of the striking board 4 is worn out, this striking board 4 is reversed and used, and when the front-end | tip part and back end part of the striking board 4 are worn out, it replaces | exchanges for a new striking board. In this case, when the striking plate 4 is removed, the striking plate 4 is removed by a procedure reverse to the attachment procedure described above.
That is, by attaching / detaching the wedge 5, the striking plate 4 can be easily attached / detached to / from the notch groove 32 of the rotor disk 31, and the attaching / detaching work efficiency of the impact plate 4 can be improved.

Further, in the present invention, since the striking plate 4 is mounted in the notch groove 32 of the rotor disk 31 using the wedge 5, the striking force of the striking plate 4 due to the centrifugal force is supported, and at the same time, the striking force is utilized using the centrifugal force. It is possible to compress and clamp the plate 4 in the direction in which the plate 4 is clamped (direction of arrow A).
As a result, the striking plate 4 can be securely and firmly attached to the rotor disk 31 even at high speed rotation.

It is a side view which shows the rotor of the impact-type crusher in this invention Example. It is a perspective view which shows the rotor of the impact-type crusher in this invention Example. It is sectional drawing which shows the outline of the impact type crusher of this invention Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 10 Inlet 11 Outlet 2 Repulsion board 3 Rotor 30 Rotor shaft 31 Rotor disk 32 Notch groove 32a Wedge fitting part 32b Back groove part
32c Strike plate receiving port 33 Wedge receiving surface 4 Strike plate 40 Uneven surface (batch plate side locking portion)
5 Wedge 50 Wedge surface 51 Concavity and convexity (wedge side locking portion)
6 Protector 61 Fixing pin C Rotor center R Radius line

Claims (2)

A casing (1), a rotor (3) to which a striking plate (4) is attached, and a repulsion plate (2) disposed around the rotor (3) are supplied into the casing (1). An impact-type crusher that crushes the object to be crushed by crushing operation by striking the striking plate (4) and repulsion plate (2),
The rotor (3) includes a rotor shaft (30), two rotor disks (31, 31) attached to the rotor shaft (30) in an opposed state, and the two rotor disks (31, 31). ) Formed with a striking plate (4) mounted in a state passed between,
A notch groove (32, 32) for attaching a striking plate (4 ) is formed at the tip of each rotor disk (31, 31) ,
The notch groove (32, 32) has a striking plate receiving port (32c, 32c) for receiving and fitting the striking plate (4) from the radial line (R) direction passing through the rotor center (C). An opening is formed in the front end surface of the disk (31, 31),
When the wedge fitting portion (32a) is formed in the notch groove (32), the groove width gradually narrows as the radius from the rotor center (C) increases in the wedge fitting portion (32a). A wedge receiving surface (33) is formed,
The striking plate (4) is formed in a substantially rectangular shape that is long in the facing direction of the rotor disk (31, 31), and striking plate side locking portions (40) are formed at both side ends thereof,
A wedge surface (50) that is in contact with the wedge receiving surface (33) of the notch groove (32) is formed on one surface, and a wedge side locking portion (on the other surface) that engages with the striking plate side locking portion (40). 51) formed with a wedge (5) is detachably fitted between the wedge receiving surface (33) and the striking plate (4) from the axial direction of the rotor (3),
The wedge (5) receives the centrifugal force accompanying the rotation of the rotor (3), and the wedge (5) is compressed and tightened in the direction of clamping the striking plate (4) by the wedge action of the wedge surface (50) and the wedge receiving surface (33). An impact crusher characterized by being formed so that it can be fixed. It is a striking board (4) used for the impact type crusher of Claim 1, Comprising: The said striking board side latching | locking part (40) is formed in both surfaces in the center part of the both ends of this striking board (4), The tip side and the back end side are formed symmetrically around the striking plate side locking portion (40),
The striking plate is detachable from the cutout groove (32) of the rotor disk (31) by attaching and detaching the wedge (5).

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