JPH05228383A - Crushing blade - Google Patents

Abstract

PURPOSE:To reduce manufacturing cost, to easily perform replacement work based on abrasion and damage, to shorten a time and to decrease the space of stock for replacement. CONSTITUTION:In a crusher wherein the crushing material is crushed by rotational shock while a crushing blade is revolved integrally with a rotary shaft rotated in a crushing chamber around the rotary shaft, only the part 2 violent in collision against the crushing material is formed of specially hardened steel high in resistance to shock. The other large parts 4 are formed of common steel. The part 2 formed of specially hardened steel is detachably fixed to the parts 4 formed of common steel by fitting bolts 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing blade attached to a crushing device. More specifically, a crushing device that crushes crushed material consisting of waste products of various products made of metal materials, synthetic resin materials, etc. by rotary impact, and manufactures crushing blades that apply rotary impact to the crushed material, Regarding improvements related to maintenance costs, etc.

[0002]

2. Description of the Related Art Conventionally, for example, a crushing device shown in FIG. 5 has been known. Known crushing blades equipped in such a crushing device are shown in FIGS. 6 and 7. However, although not shown in the vertical type shown in FIG. 5, a horizontal type crushing device also exists as a conventional technique, and therefore, crushing blades are also often used for those horizontal types.

In this conventional crushing device, a rotor shaft B is arranged in a substantially vertical direction at a substantially central portion inside a crushing chamber A having a crushing material input port Aa in the upper part and a crushing material discharge port Ab in the lower part. The disk-shaped rotor disk C is coaxially fixed to the rotor shaft B in a hierarchical manner, and the mounting pin D for mounting the crushing blade F is fixed to each rotor disk C so as to penetrate therethrough. The rotor shaft B is used in the crushing chamber A.
Is connected to a drive transmission system E including a belt Ea, a motor Eb and the like outside.

Further, this conventional crushing blade F has a mounting hole 1 which is loosely fitted in the mounting pin D and has a rotor shaft B.
The rotor shaft B revolves integrally with the rotation of the rotor shaft B and rotates (spins) around the mounting pin D so that a rotational impact can be applied to the crushed material. It has a ring shape as shown or a fan shape as shown in FIG. In such a conventional crushing blade F, the whole is formed of special hardened steel having high impact resistance in order to reduce wear damage due to collision with the crushed material, but it was necessary to replace due to wear damage. In this case, in the ring shape shown in FIG. 6, the periphery collides with the crushed material substantially evenly and is uniformly worn, so that the whole is replaced with a new one. However, in the fan shape shown in FIG. Since it collides violently and wears away due to uneven wear, the same thing is reversed and exchanged so that the uneven wear portion S is replaced with the rear side after rotation.

The conventional crushing blade as described above has a problem that the manufacturing cost increases because the whole is made of special hardened steel having high impact resistance. In addition, when exchanging due to wear damage, it is necessary to disassemble the crushing device that pulls out the mounting pins from the rotor disk using a crane, etc., and the crushing blade itself is heavy enough to require a crane to transport. However, the replacement work is troublesome and time-consuming. Further, since the entire new crushing blade must be stocked for replacement, there is a problem that a stock space for replacement is required widely.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, can be manufactured at low cost, and replacement work due to abrasion damage can be performed easily and in a short time. An object of the present invention is to provide a crushing blade that requires less stock space for replacement.

[0007]

In order to solve the above-mentioned problems, the crushing blade according to the present invention crushes crushed material by rotational impact while revolving around the rotor shaft integrally with the rotor shaft rotating in the crushing chamber. In the crushing blade to be used, only the part of the crushing blade that has a high collision with the crushing material is made of special hardened steel with high impact resistance, the other part is made of ordinary steel, and the special hardened steel part is made of ordinary steel. The means is characterized in that it is detachably fixed to the part with a mounting bolt.

[0008]

According to the above-mentioned means, one part is formed of expensive special hardened steel, and the other part is formed of inexpensive ordinary steel, so that only small and light special hardened steel parts are replaced. Therefore, it is possible to manufacture the entire crushing blade at a considerably low cost, the replacement work due to wear damage can be performed easily and in a short time, and there is a problem of providing a crushing blade that requires less stock space for replacement. Will be resolved. Needless to say, the crushing blade of the present invention can be used not only in a vertical crushing device but also in a horizontal crushing device.

[0009]

EXAMPLES Examples of the crushing blade according to the present invention will be described below with reference to FIGS.
A description will be given based on FIG.

1 to 3 show a first crushing blade according to the present invention.
An example is shown. In this embodiment, a fan-shaped blade (fan blade) is shown.

In the crushing blade F of this embodiment, a portion for violently colliding with the crushed material including the uneven wear portion S is the rectangular replacement portion 2. The replacement part 2 is made of special hardened steel having high impact resistance, is provided on both the front side and the rear side of the rotation, and is detachably fixed to the main body part 4 except the replacement part 2 by a mounting bolt 3. It has become so. The bolt holes 5 into which the mounting bolts 3 of the replacement part 2 are inserted are formed in a symmetrical shape so that the mounting bolts 3 can be inserted from the opposite side as well, so that even if they are reversed, the bolt holes 5 are located at the same position. It is formed in the long part.

Further, the main body portion 4 is made of inexpensive ordinary steel, and is provided with a rectangular notch 6 on which the replacement portion 2 is attached on both the front side and the rear side of rotation. Further, the main body portion 4 is provided with a screw hole 7 which is in communication with the notch 6 and into which the mounting bolt 3 is screwed.

According to such an embodiment, only a part of the crushing blade F composed of the replacement portion 2 is formed of expensive special hardened steel, and most of the crushing blade F composed of the main body portion 4 is inexpensive ordinary steel. Since it is formed in step 1, the manufacturing cost of the entire crushing blade F is reduced. In addition, since the replacement portion 2 that is a portion that violently collides with the crushed material is formed of special hardened steel, the overall impact resistance of the crushing blade F does not decrease.

When the replacement portion 2 is worn and damaged, the mounting bolt 3 is removed and the uneven wear portion S formed on the replacement portion 2 is cut into the body portion 4 as shown in FIG. Position it on the 6 side and tighten the mounting bolt 3 again. As a result, the portion that violently collides with the crushed material is not worn and damaged, and the entire new crushing blade F is replaced. Such replacement can be performed three times in the replacement portion 2 on the front side of rotation (the wear portion S is worn out at four locations).
Is formed. ), After that, it is replaced with the replacement part 2 on the rear side after rotation, which is hardly worn and damaged. Further, with respect to the replacement portion 2 in which the worn-down wear portions S are formed at four locations, it is possible to add the padding wear-up portions S to the reuse portions 2 and reuse them.

In such replacement of the replacement part 2, it is not necessary to disassemble the crushing device for pulling out the mounting pin D from the rotor disk C using a crane or the like, and the size and weight are smaller than the crushing blade F as a whole. Therefore, the replacement work is easy and does not take much time, and since only the small and lightweight replacement part 2 needs to be stocked for replacement, the stock space for replacement is small.

FIG. 4 shows a second embodiment of the crushing blade according to the present invention. In this embodiment, a ring-shaped member (round blade) is shown.

In the crushing blade F of this embodiment, the replacement portion 2 is radially arranged on the outer periphery of the main body portion 4 to positively form a portion that violently collides with the crushing material.

According to such an embodiment, it is possible to replace the replacement part 2 once (the two worn parts S are worn away).

In this embodiment, since the centrifugal force of the rotor disk C acts in the direction in which the mounting bolt 3 and the replacement portion 2 come off, a stopper protrusion 8 is provided at the base end of the replacement portion 2. Corresponding to the retaining protrusion 8, a retaining groove 9 is provided in the notch 6 of the main body 4.

[0020]

As described above, in the crushing blade according to the present invention, only a part is formed of expensive special hardened steel and the other part is formed of inexpensive ordinary steel, so that the entire manufacturing cost is reduced. effective.

Further, since only a small and light portion of the crushing blade is used for replacement and the disassembling of the crushing device is not required, there is an effect that the replacement work when the crushing blade is worn and damaged is easy and does not take time.

Furthermore, since only a small and lightweight part of the crushing blade is used for replacement, there is an effect that the stock space for replacement is small.

[Brief description of drawings]

FIG. 1 is a partially cut plan view showing a first embodiment of a crushing blade according to the present invention.

FIG. 2 is a partial view showing a replacement state of FIG.

FIG. 3 is a partial view showing another exchange state of FIG.

FIG. 4 is a partially cut plan view showing a second embodiment of the crushing blade according to the present invention.

FIG. 5 is a cross-sectional view showing an entire conventional crushing device.

6 is a cross-sectional view taken along line XX of FIG. 5, showing a conventional crushing blade.

FIG. 7 is a cross-sectional view showing another conventional crushing blade of FIG.

[Explanation of symbols]

 2 Replacement part (portion where collision with crushing material is severe) 3 Mounting bolt 4 Body part (most part other than replacement part) A Crushing chamber B Rotor shaft

Claims (1)

[Claims] 1. A crushing blade for crushing crushed material by rotational impact while revolving around the rotor shaft integrally with a rotor shaft that rotates in a crushing chamber, and impact-resistant only a portion of the crushing blade that is severely collided with the crushed material. A crushing blade characterized by being formed of highly hardened special hardened steel, and most of the other parts made of ordinary steel, and the special hardened steel portion being removably fixed to the ordinary steel portion with mounting bolts.