JPS5921665B2 - Impact crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a rotor and a screen, the rotor carries a striking tool and is mounted in a casing, and the casing has a box-shaped door that rotates laterally. The rotation axis of this door is provided at the bottom of the crusher parallel to the axis of the rotor, and the door surrounds the rotor and forms one unloading space with the door. This invention relates to an impact crusher equipped with a sieve and a sieve frame for accommodating the sieve attached to the door.

In the case of known structures of this kind, the rotation axis is located below the impact crusher. The door is fixed to a lever arm that is pivotally connected to and extends below the pivot shaft. When opening the door these arms abut the casing and limit the pivoting movement. The pivot shaft extends downward so that the sieve plate fixed to the casing can be removed.

The door, which is restricted in its opening, is pushed downwards to reach the sieve fixing part, allowing it to be dismantled and the sieve plate to be taken out. The reverse is done when fixing a new cribriform plate. This structure is fully effective. The disadvantage is that replacing one sieve plate is relatively troublesome and time consuming.

The impact mill according to the invention does not have this drawback. The percussion crusher according to the invention is arranged in a box in which a part of the sieve frame is formed as a door, and when the door is closed, the part of the sieve frame that projects from the box hits the outlet hopper of the casing. It is characterized by being located above. Removal of a single sieve plate is accomplished with the same movement as opening a door. A sieve frame for accommodating the sieve is attached to the door, the sieve forms a discharge space together with the box-shaped door, and in particular the sieve frame is partially arranged inside the box formed by the door. In some cases, the structure is simple.

In this way, the sieve is held on the side, and if the sieve frame has bars parallel to the axis of the rotor, the sieve is held in the direction of the periphery in order to hold the sieve and define the part of the periphery of the rotor where the sieve is provided. Secured. The sieve may become deformed as it receives shock from foreign objects in the product.

However, this is avoided if a transverse beam is fastened to the casing, the inner surface of which has wings for radial retention of the sieve. A great advantage of such a construction is that the sieve can be easily fitted into the sieve frame and inserted into the door without having to be secured, for example by a number of screws.

In order to significantly shorten the time for replacing the sieve, during its exchange the manufacture of the sieve itself is limited to chopping and shaping, so that the sieve does not have to be provided with holes or reinforcements. The sieve can easily be secured in the direction of the rotor if the sieve frame, in particular the opposing bearing for the ring, is fastened to the casing. The sieve is fitted between the sieve frame and the opposing support when the door is closed. If the pivot axis of the door is placed close to the vertical plane cut by the rotor axis on the underside of the rotor, only two doors will be enough to cover the entire circumference of the rotor with the two sieves. Since it can be enclosed, a large sieving surface for a given volume and therefore also a large capacity is obtained.

When opening the door, intersecting the rotor field is prevented, especially if the pivot axis is below the deepest point of the door. If the door is pushed onto the pivot shaft, it can be completely removed from the crusher in order to insert the sieve onto the sieve frame. This makes handling easier. This is easy if an arm for pivoting to a rotating shaft is fixed to the lower part of the sieve frame projecting forward from the door, and the arm is provided with an open bearing hole or an open slit on one side. It becomes a structure.
Rapid closing or unlocking of the door is possible with a single screw for fixing the top of the door to the casing. If the structure of the door is box-shaped, the rotor can protrude from the casing.

The bolt on which the percussion tool is attached can be pulled out after loosening a specially provided safety device and the percussion tool can be changed without having to remove the rotor from the casing. The figure showing one embodiment will be described in more detail.

The rotor 1 is installed inside the casing 11 (Figures 1 and 3).
2 are arranged.

The rotor 12 consists of two plates 13 fixed to one shaft 15.
, 14. These plates are the support member 17
are tightly connected by. A bolt 18 is inserted into the support member 17, and a striking tool 19 is pivotally connected to this bolt. A shaft 15 driven by a motor (not shown) is supported in a bearing 21 of the casing 11.

The casing has a front wall 23 and a rear wall 24. These walls are connected by various transverse members. That is, the upper wall 26 at the entrance 27, the upper crossbeam 28
, the lower cross beam 29, and the wall 30 of the exit hopper 31.
Two doors 35, 36 of the same construction that open laterally are pivotally connected to the casing 11.

The door 35 is box-shaped. A sieve frame 39 is fixed to this. A portion of this sieve frame is inside the door 35. The sieve frame has a bar 40 parallel to the axis of the rotor 12 at the bottom. Sieve frame 3
A sieve 43, in particular a perforated plate, is inserted into a portion of the door 9 and the door 35. The perforated plate surrounds almost half the circumference of the rotor 12. The crosspiece 40 serves to support the sieve 43 and defines the portion of the periphery of the rotor 12 in which the sieve 43 is provided. The cross beams 28, 29 have wings 45 on their inner surfaces. A sieve 43 is held on the underside of this wing. Casing 11
A ring 46 is fixed to the walls 23 and 24. These rings serve as counter supports for the sieve frame 39 for tightening the sieve 43. There is a carry-out space 48 for the sieve 43 and the door 35. An arm 53 is fixed to a lower portion 51 of the sieve frame 39 that projects from the door 35.

A bearing hole 54, which is open on one side, is fixed to these arms. The pivot axis of the door 35 is provided below the rotor 12 near a vertical plane passing through the axis of the rotor 12 and below the deepest point of the door 35. The rotation axis is the casing 1
Two bolts 5 fixed to the walls 23 and 24 of 1 in the same row
7,58. By means of the arm 53 and the bearing hole 54 which is open on one side, the door 35 can be fitted onto the bolts 57, 58 of the pivot shaft. Casing 1
In order to fix the upper parts of the doors 35 and 36, a single screw 60 that can be rotated in the horizontal direction is installed. The plate 13 is shown in FIG. 5, which shows the rotor 12 without the supporting member 17.
, 14 bolts 18 are shown.

A plate 71 is welded to the disc 14 and serves to prevent the bolt 18 from moving in the axial direction. A threaded bolt 72 is welded to the disk 13, on which a nut 74 with a nylon safety member and a spacer 75 are provided. A tongue-like member 77 is pivotally attached around the spacer 75, and this tongue-like member is clamped and crimped between two elastic discs 79 and 80 by tightening a nut 74. There is. In the position shown, the tongue 77 serves for the axial fixation of the bolt 18. The tongue is a ring 8 attached to the disc 13 by a threaded bolt 72.
It is placed inside 2. Natsu 74 once tightened
is normally not loosened any further, and the elastic disk 79,800
The cry is maintained.

The tongue 77 can be repositioned by shifting it using a screwdriver. Explain the function.

The product to be crushed enters the impact crusher through the inlet 27, is captured by the striking tool 19, and is mainly passed through the rotor 12 and the sieve 4.
3, passes through a sieve 43, and is carried out via a discharge space 48 and an exit hopper 31.

When changing the product, it is necessary to replace the sieve 43.

First, if the drive device is stopped and the rotor 12 stops rotating,
Loosen the Tomi screw 60. Tilt the doors 35 and 36 sideways to the outermost pivot position (Figure 2). Due to the deep center position of the pivot axis, no overlap occurs between the door 35 and the area of the rotor 12. Casing door 35 11
turn it towards.

In this way, a new sieve 43 is fitted between the sieve frame 39 and the ring 46. The door 35 is tightened again with a single screw 60. If it is necessary to change the impact tool 19, it is advantageous to completely remove the door.

The door is further tilted about its temporary support on the floor and the holes 54 on one side are removed from the bolts 58. The door 35 can now be removed. The tongue 77 applies a force to move the bolt 18 from the rest position shown in FIGS. 5 and 6 to the release position. After installing the new impact tool 19, the tongue 77 is returned to the fixed position by applying force. The ring 82 prevents foreign objects that may be present in the percussion mill from unintentionally loosening the safety member. Arm 53 has hole 5 on one side
At point 4, the bolts 57 and 58 are engaged again, and the door 35 is closed.

Many variations are possible.

The wings 45 of the cross beams 28, 29 can be constructed to be replaceable as wear parts.

The cross beams 28, 29 can be screwed to the housing 11 instead of being welded. The same can be said of the fixing of the sieve frame 39 of the doors 35, 36. It is often sufficient to use a ring segment instead of the entire ring 46.

The open bearing hole 54 can be an open slit.

[Brief explanation of the drawing]

FIG. 1 is a front view of the impact crusher according to the present invention, as seen in the direction of the arrow in FIG. 3, and the right half is Ib-1b in FIG.
A cross-sectional view taken along the line outside the rotor, Figure 2 is the same as Figure 1.
The diagram shows the door open, the third
The figure shows a cross section taken along the - line in Figure 1 without the door; Figure 4 shows the door viewed from the inside in the same way as in Figure 3; Figure 5 is at the bottom left of Figure 3.
FIG. 6 is a side view of the structure shown in FIG. 5, which is an enlarged detailed sectional view of the rotor. Code in the figure, 11...Casing, 12...
...Rotor, 13, 14...Disc, 15...
...Axis, 17...Supporting member, 18...
・Bolt, 19... Impact tool, 21...
・Bearing, 23...Front wall, 24...
Rear wall section, 26... Upper wall section, 27...
・Entrance, 28... Upper crossbeam, 29...
Lower cross beam, 30...Wall part, 31...Exit hopper, 35, 36...Tiltable door,
39... Sieve frame, 40... Crosspiece, 43...
... Sieve, 45 ... Wings, 46 ... Ring, 48 ... Carrying out space, 51 ... Lower part of sieve frame, 53. ...Arm, 54...
・・Bearing element L57, 58・・・・Bolt, 60・・
...Tomi one screw.

Claims (1)

[Claims] 1. A rotor and a sieve, the rotor carrying a striking tool and mounted in a casing, the casing having at least one box-shaped door that rotates laterally. It is pivoted,
The rotation axis of this door is installed at the bottom of the crusher parallel to the axis of the rotor, and the door is equipped with a sieve that surrounds the rotor and forms one discharge space with the door. In the percussion crusher, which is also fitted with a sieve frame for accommodating the sieve, a part of the sieve frame 39 is arranged in a box formed as a door 35, 36, and when the door is closed, the The protruding part of the sieve frame 39 is the casing 11
An impact crusher characterized by being located above an outlet hopper 31 of. 2. The impact crusher according to claim 1, wherein the rotation axes of the doors 35 and 36 are provided below the rotor 12 and near a perpendicular plane passing through the axis of the rotor 12. 3. The impact crusher according to claim 2, wherein the rotation shaft is located below the deepest point of the doors 35, 36. 4. The impact crusher according to any one of claims 1 to 3, wherein the doors 35, 36 are configured to be pivotally attached to a rotating shaft. 5 At the bottom of the sieve frame 39 protruding from the doors 35 and 36,
The impact crusher according to any one of claims 1 to 4, wherein an arm 53 for pivotally mounting on a rotating shaft is fixed. 6. The impact crusher according to claim 5, wherein the arm 53 has a bearing hole 54 or a bearing slit that is open on one side. 7 bolts 57 and 58 are inside the casing 11;
An impact crusher according to any one of claims 2 to 6. 8. A bar 40 parallel to the axis of the rotor 12 for the sieve frame 39 to hold and position the sieve 43 on the peripheral edge of the rotor 12.
An impact crusher according to any one of claims 1 to 7, which has the following. 9. The blower according to any one of claims 1 to 8, wherein cross beams 28, 29 are fixed to the casing 11, and there are wings 45 on the inner surfaces of the cross beams for supporting the sieve 43 in the radial direction. type crusher. 10. The impact crusher according to any one of claims 1 to 9, wherein a ring 46 or a part of the ring is fixed to the casing 11 as an opposing support for the sieve frame 39.