JPS5924367Y2 - Structure of rotary blade for sliver type crusher - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a rotating blade for a slitter-type crusher, which ensures the necessary strength while making it easy to replace the side blades, and which is supplemented with an instance plate that is commensurate with the grinding allowance. The main purpose is to increase the lifespan by doing so.

Conventionally, as a rotary blade for a slitter-type crusher, there is a rotary blade in which a material retracting claw portion is provided protruding from the outer periphery of a rotary blade shank, and side blades are detachably attached to both sides of the shank with bolts.

The rotary blades are fitted onto two opposing shafts via keys or splines, respectively, and the side surfaces of the rotary blades, that is, the side blades, are brought into sliding contact with each other to crush the material scraped by the retracting claws.

Therefore, the side blades will wear out over time, and for this reason, they are finished by grinding, but the work of removing the side blades for the grinding finish may cause the material, especially fine powder, to be welded or attached. If so, it would be extremely difficult to remove it.

The present invention eliminates such conventional drawbacks,
The feature is that the rotary blade for a crusher has a material retraction claw integrally protruding from the outer periphery of the rotary blade shank, and side blades are detachably attached to both sides of the rotary blade shank. A tapered surface is formed at the base of the claw portion in the thickness direction of the shank, and a resistance plate is removably interposed between both side surfaces of the rotary blade shank and the inner surface of the side blade.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Prior to that, an example of a crusher to which the rotary blade of the present invention is applied will be described with reference to FIGS. 1 and 2.

Note that the rotary blade of the present invention is not limited to those shown in Figures 1 and 2, but may be of a slitter type. A crushing chamber 4 has an input zone 2 and a lower half thereof a broken product discharge zone 3.

Reference numeral 5 designates a pair of rotors, and a collar 7 and a rotary blade 8 are fitted onto a rotating shaft 6 as shown in FIG. Blade 8
The opposite sides of the blades are brought into meshing and sliding contact with each other as shown in FIG. 2, so that they are rotated inwardly in the direction of the arrow in FIG. The scraped material is crushed at the meshing and sliding contact portion.

In addition, 11 is a rotary scraper, 12 is a screen,
Reference numeral 13 indicates an input conveyor, and 14 indicates an output conveyor.

That is, the material input from the input conveyor 13 is
They are scraped off from each other by the rotary blade 8, slittered by the meshing sliding contact on the side of the rotary blade 8, and the particle size is adjusted by the screen 12. Those that cannot pass through the screen 12 are scraped up again into the input zone and sequentially crushed. During this operation, the scraper 11 scrapes off anything that adheres to the rotary blade.

The rotary blade 8 in the above crusher is constructed as follows.

In the first embodiment shown in FIGS. 3 to 5, 14 is a circular rotary blade shank, which has a mounting hole 15 in the center.
The periphery of the cylinder boss portion 16 is formed on the periphery of the cylinder boss portion 16, and a material retracting claw portion 10 is integrally provided on the outer periphery via a thin shank portion 17.

The material retraction claws 10 are protruded at equal intervals in the circumferential direction, and there are three in this example, and a top blade 18 is welded to the rotation leading side of the claws 10 in this example.

At the base of the material retraction claw part 10, a tapered surface 19 in the shank thickness direction is formed at an angle of, for example, 15 degrees, and on both sides of the shank part 17 there are four side blades 20 equally distributed in this embodiment. is detachably attached via bolts 21.

That is, a screw hole 22 is provided through the thin shank portion 17, and the inner circumferential surface 2OA of the side blade 20 is mounted and fitted onto the cylindrical boss portion 16, so that the outer circumferential surface 20B of the side blade 20 is inserted into the circle of the thin shank portion 17. The bolts 21 are fastened so as to match the circumferential surface, and the bolt heads can be accommodated in the recesses 20C formed in the side blades 20.

Therefore, in the rotary blade according to the first embodiment, the side blade 2
The material is crushed by the sliding engagement of the outer surfaces of the side blades, but when the outer surfaces are worn out and when finishing the fatigue layer due to the difference in peripheral speed between the outer and inner circumferential sides of the side blade. After loosening the bolt 21 and removing the side blade 20, the blade 20 will be finished by grinding. In such a case, the side blade can be removed by inserting a tool etc. through the tapered surface 19 and prying the tool. 20 is removed, and a distance plate 23 having a thickness corresponding to the grinding allowance of the side blade 20 is placed between the thin shank portion 17 and the guide blade 20 as shown in FIG. 5, and then tightened together with bolts 21.

In the second embodiment shown in FIGS. 6 to 8, the means for attaching the side blade 20 is different from the first embodiment, and the rest is the same as in the first embodiment, so common parts are denoted by common reference numerals. The differences will be explained below.

As shown in FIGS. 7 and 8, the hole in the shank portion 17 is a blank hole 24, into which the bolt 21 is loosely inserted and the nut 25 is inserted.
According to this, if one of the side blades 20 is removed, the other blade 20 can also be removed, and the number of bolts 21 is the same as in the first embodiment. It can be halved, and
Installation is also easy.

However, in the first embodiment, when removing one side blade 20 and then removing the other blade 20, a long bolt is screwed into the screw hole 22, and the bolt is used as a so-called screw jack to increase the adhesion of the side blade 20. Even if it is large, it can be removed.

In each embodiment, the inner circumferential surface of the side blade 20 is fitted into the cylindrical boss portion 16;
When the cylindrical boss portion is formed in the cylindrical boss portion, it is also possible to fit into the boss portion.

Further, a large number of distance plates 23 having different desired thicknesses are prepared, and one suitable for the polishing or grinding finishing allowance of the side blade 20 is selected and interposed.

In the present invention, side blades 20 are provided on both sides of a rotary blade shank 14, and the side blades 20 are removably superimposed on both sides of the rotary blade shank 14, and the base of the retractable claw part 10 integrally protruding from the outer periphery of the shank 14 has a taper in the thickness direction of the shank. Since surface 19 has been formed,
When the side surface of the side blade 20 is worn out and the blade 20 is to be removed for grinding, the blade 20 can be easily removed by forcing a tool into one of the tapered surfaces.

In this case, a tapered surface may be formed on the cylindrical boss portion 16, but the cylindrical boss portion 16 is a portion that bears the crushing load acting on the side blade 20, and therefore, the portion If a taper is formed on the outer circumferential side, the load bearing will not be sufficient and the tool insertion work will be troublesome due to the distance collar 7, etc., but in the present invention, a tapered surface 19 is formed on the outer peripheral side to facilitate tool insertion. This ensures that the side blade 20 bears the load and prevents the bolt 21 from breaking.

Further, after the side blade 20 has been finished by grinding, the life of the rotary blade 8 can be extended by a simple means by interposing the distance plate 23.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an example of a crusher using the rotary blade of the present invention, Fig. 2 is an explanatory diagram of the meshing state of the entire rotor, Fig. 3 is a front view of the rotary blade of the first embodiment, and Fig. 4 is the same cross section. 5 is a sectional view after grinding, FIG. 6 is a front view of the second embodiment, FIG. 7 is a sectional view thereof, and FIG. 8 is a sectional view after grinding. 10... Material retraction claw portion, 14... Rotating blade shank, 19... Tapered surface, 20...
... Side blade, 21 ... Bolt, 23
・・・・・・Distance plate.

Claims (1)

[Scope of utility model registration request] In a rotary blade for a crusher, in which a material retraction claw part 10 is integrally provided on the outer periphery of the rotary blade shank 14 and side blades 20 are detachably attached to both sides of the rotary blade shank 14, the material retraction claw part A sunotsuta is characterized in that a tapered surface 19 is formed at the base of the rotary blade 10 in the thickness direction of the shank, and distance blades 23 are detachably interposed between both sides of the rotary blade shank 14 and the inner side of the side blade 20. Structure of rotary blade for shape crusher.