JPH10137612A - Shearing crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate and accelerate the assembly-setting of a rotary blade on a shaft and the replacement of the abraded or broken rotary blade by complementarily engaging the rotary blade divided circumferentially with a spacer. SOLUTION: The assembly-setting of a rotary blade C on a shaft and the replacement of the blade C are facilitated by complementarily engaging the blade C divided circumferentially with a spacer 3 by engagement grooves 2c and projections 3b which are formed in the blade C or the spacer 3. Ordinarily, the blade C is held from both sides by spacers 3. In another means, however, a rotary blade piece and the spacer on one side are formed integrally, and the rotary blades with adjoining spacers are complementarily engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rotary blade divided in the circumferential direction and a spacer, which are fitted in a concave and convex manner so that the rotary blade can be easily mounted on a shaft or replaced with a worn or defective rotary blade. To a shear crusher.

[0002]

2. Description of the Related Art A biaxial shear crusher, which is a typical example of a shear crusher, has a drive shaft and a driven shaft which are arranged side by side in parallel at a predetermined interval, and are configured to rotate inwardly. On the driven shaft, a number of rotary blades are alternately mounted with the spacers in close contact with each other, and the sides thereof are closely wrapped with a minute gap of about 0.5 to 1 mm. The rotary blade of the shear crusher is made of metal, plastic,
Since various crushed materials such as wood are crushed, they are severely worn and require frequent replacement.However, since the whole is a unitary material, the whole must be replaced even if it is partially damaged. There was a problem.

In order to solve this problem, Japanese Utility Model Publication No.
Japanese Patent Publication No. 31953 discloses a blade holder which is fitted on a shaft of a rotary blade and a plurality of detachable blade bodies which are circumferentially divided so as to surround the blade holder. In this blade body, two bolts are screwed into the blade receiving base from the radial outside on the outer periphery and fixed. Since the rotary blade is composed of several blades, the number of bolts is large.

[0004]

Problems to be Solved by the Invention
In the configuration as disclosed in Japanese Unexamined Patent Publication No. 953, when replacing a large number of blades, a large amount of labor is required because many bolts are removed or screwed. In particular, when a large number of rotary blades are simultaneously replaced, a great deal of labor and time are required.

In addition, since the bolt head is embedded within the range of the thickness of the blade, when the thickness of the blade is small (often in the case of a small-capacity model), the bolt diameter becomes small, and the necessary fixing force and There is a problem that bolt strength cannot be obtained. In such a case, the idea of making the blade body detachable with a bolt cannot be adopted.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a rotating blade divided in the circumferential direction and a spacer on one or both sides adjacent to each other, which are unevenly fitted to each other on the shaft of the rotating blade. It facilitates assembly and mounting and replacement of worn or missing rotary blades. Usually, the rotary blade is sandwiched from both sides by separate spacers, but the rotary blade and the spacer on one side are integrally formed, and the adjacent rotary blades with spacers are fitted on the shaft by uneven fitting. There are also means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a rotary crusher in which a plurality of rotary blades arranged in a row on a shaft supported by a casing of a shear crusher with a spacer interposed therebetween are divided in the circumferential direction. This is a shearing crusher in which the plurality of divided rotary blade pieces and adjacent one or both side spacers are fitted in a concave and convex manner and each rotary blade is mounted on a shaft. This facilitates quick and easy assembly and installation of the rotary blade on the shaft and replacement of the worn or missing rotary blade. The number of divisions of the rotary blade may be determined so that the rotary blade piece has a weight that can be easily handled.

In this case, if a fitting groove or a projection is provided on one or both surfaces of the rotary blade piece and a projection or a fitting groove is provided on one or both surfaces of the spacer, the two can be unevenly fitted with a simple structure. In addition, if the shaft is a shaft having a square cross section that is easy to machine, and the rotary blade is divided into two at the symmetrical position, the number of parts is small and mounting and replacement are easy.

A rotary blade with a spacer, which is formed integrally with a spacer on one surface of each of a number of rotary blades arranged in a row with a spacer interposed therebetween on a shaft supported by a casing of a shear crusher, is provided in a circumferential direction. This is a shear crusher in which rotary blade pieces with spacers are divided into a plurality of rotary blade pieces with spacers, and adjacent rotary blade pieces with spacers are unevenly fitted to each other at different split positions and each rotary blade with spacers is mounted on a shaft. Since the spacer is incorporated in the rotary blade, the number of parts is reduced, so that the work for replacing and replacing the rotary blade is omitted, and this operation is quick and simple.

In this case, a fitting groove or a projection is provided on the side surface of the rotary blade piece of each rotary blade piece with a spacer, and a projection or a fitting groove is provided on the side surface of the spacer portion. Good. In addition, the axis is a square section axis, and each rotary blade with spacer is
What is necessary is just to divide.

Further, if a nut is screwed into the shaft end and tightened to fix the rotary blade and the spacer or the rotary blade with spacer on the shaft, the fixing structure is simple and the fixing work is also simple. is there.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment, and is an exploded perspective view of a double-slit rotary blade and a spacer mounted on a drive shaft or a driven shaft (hereinafter simply referred to as a shaft) of a twin-shaft crusher. FIG. 2 is a cross-sectional view of a main part in which these are mounted. FIG.
FIG. 5 is a front view when the rotary blade pieces are combined on an axis.

Although not shown, both ends of the shaft 1 are supported by a casing of a crusher. The shaft 1 preferably has a square cross section, on which a rotary blade C, which is preferably divided into two in the circumferential direction, is fixed. Each of the divided parts is called a rotary blade piece 2. On the outer periphery of the rotary blade C, a blade portion 2a is formed so as to protrude, and an engaging concave portion 2b (in this example, a chevron-shaped concave with a vertical angle being a right angle) is formed at the center so as to be able to engage with two surfaces of the shaft 1 having a square cross section. Is formed. The other rotary blade piece 2 is also provided with the same engagement concave portion 2b.
Are combined, the engagement recesses 2b are combined to form a square fitting hole 2B (FIG. 3). A semicircular fitting groove 2c is formed to surround the engaging recess 2b and fit into an annular projection 3a of the spacer 3 described later. Accordingly, an arc-shaped fitting groove is formed when the two rotary blade pieces are combined (FIG. 3). In this example, the rotary blade is symmetrically divided from the diagonal position 2d of the square shaft 1 as shown in FIG. 3, but the invention is not necessarily limited to this division. The square axis 1 may be symmetrically divided into two from the center position 2e of the diagonal plane. Although the number of parts may be small in two divisions, in the case of a large model or the like, four parts may be divided from each diagonal position to reduce the weight of each piece.
Although a shaft having a square cross section is easy to machine, a regular polygonal cross section such as a regular hexagon may be used, and these can transmit the rotating force of the shaft to a rotary blade or a spacer without using a key or the like. However, a shaft having a circular section having a key may be used. The number of blades 2a is not limited to five on the circumference of the rotary blade.

The rotary blade piece 2 divided as described above is integrated on the shaft 1 by the spacer 3 and mounted on the shaft without falling. That is, the spacer 3
Has a circular outer shape, a fitting hole 3a (square hole in this example) for fitting to the square shaft 1 is formed at the center thereof, and an annular projection 3b is provided near the outer edge thereof.
Therefore, by interposing the protrusion 3b into the fitting groove 2c (concavity and convexity fitting) by sandwiching the spacer 3 from both sides of the rotary blade fixed on the shaft, the rotary blade piece is integrated and formed as one rotary blade on the shaft. Will be installed. Note that it is only necessary that the rotary blade C and the spacer 3 can be fitted into the recesses and protrusions, and a fitting groove or a protrusion may be provided in any one. Also, in the figure, an example is shown in which fitting grooves or projections are provided on both surfaces of the rotating blade and the spacer.
This may be provided only on one side of the spacer. Providing a fitting groove on one side is advantageous in terms of workability and strength.

A screw shaft 4 is continuously provided at an end of the shaft 1 having a square cross section, and a screw is cut around its outer periphery. An outer end shaft 5 for supporting the bearing extends from the tip of the screw shaft 4.

A procedure for assembling and mounting the shaft 1, the spacer 3, and the rotary blade C having the above configuration on the shaft will be described.

Insert the required number of spacers 3 from the shaft end,
Next, after the rotary blade piece 2 split into two from the vertical or horizontal direction is fixed to the shaft 1 between the spacers 3, the spacers 3 on both sides are engaged.
When the rotary blade is shifted so as to sandwich the rotary blade, the annular projection 3b of the spacer 3 is fitted into the fitting groove 2c of the rotary blade piece 2. As a result, the split rotary blade piece 2 becomes one rotary blade C
Is securely held on the shaft 1. In the above manner, the rotary blade C is fitted into the spacer 3 one after another as shown in the figure, and the shaft 1 is rotated.
I will attach it on top. And finally, the spacer 3 at the shaft end
The collar 6 and the nut 7 are mounted on the screw shaft 4 at the shaft end from behind the e, and the nut 7 is rotated to tighten the whole.

When the crusher is used for a certain period of time and the blade portions 2a of the entire rotary blade C are worn and need to be replaced all at once, the worn rotary blade C is removed in the reverse procedure to the above. Then, a new rotary blade C may be mounted on the shaft 1 again as described above. Further, when some of the rotary blades C are missing, the nut 7 at the shaft end is loosened to remove the other rotary blades C and the spacers 3 without removing the other rotary blades C and the spacers 3 from the shaft 1.
Is slightly displaced along the axis 1 (the amount of the displacement may be a distance by which the spacer projections 3b on both sides of the missing rotary blade C can be separated from the fitting groove 2c). After the engagement with the spacer 3 is released, it may be removed from the shaft 1. Since the rotary blade C is divided into two parts, the rotary blade C can be easily removed from the shaft 1. Therefore,
Regardless of whether the rotary blade C is partially replaced or completely replaced, the rotary blade C can be replaced quickly without much labor.

FIGS. 4 to 6 show a second embodiment, which is simply an example in which the same half-split spacer portion as the rotary blade piece is integrated on one side of the rotary blade piece in the first embodiment.
That is, the spacer portion 03 having a semicircular arc is integrally formed on one side of the rotary blade piece portion 02. This is referred to as a rotary blade piece with spacer 2A. The spacer portion 03 is provided with a semi-circular projection 3b, and a semi-circular fitting groove 2c is formed on the opposite surface of the rotary blade piece portion 02. An engagement recess 2b for engaging with the shaft 1 is formed in the center, as in the above embodiment. Spacer part 03
Since the rotary blade piece portion 02 and the rotary blade piece portion 02 are integrated, when assembling the same on the shaft 1, the procedure is different from that of the first embodiment. That is, as shown in the figure, a rotary blade piece 2A with a spacer is mounted on the shaft 1 from above and below to form one rotary blade and a spacer. Next, another rotary blade piece 2A with a spacer is moved from the left and right, that is, 9
The rotary blade piece is set on the shaft from the position rotated by 0 degrees, and is moved until it is fitted into the fitting groove 2c of the rotary blade piece 2A. When viewed from the front, the joining line of the rotary blade piece comes to a position shifted by 90 degrees. By engaging the fitting groove 2c and the projection 3b with each other at the position shifted by 90 degrees in this manner, the preceding rotary blade piece 2A does not fall, and the subsequent rotary blade piece 2A does not come off from side to side. The rotating blade pieces 2A with spacers are successively mounted on the shaft 1 while being shifted by 90 degrees in this manner.
Finally, the arc-shaped projection of the circular spacer 3e is fitted into the fitting groove of the last rotary blade piece, and the nut 7 is inserted through the collar 6.
The rotary blade Ca is fixed on the shaft 1 by tightening in the same manner as in the above embodiment.

In the second embodiment, since the trouble of separately attaching and detaching the spacers can be omitted, replacement of the rotary blade is easy. Even if the spacer portion is integrated, the rotary blade is half-split, so that weight can be prevented. In particular, in the case of a small model, it is easy to handle in terms of weight, and the merit of reducing the number of parts by integrating the spacer portion with the rotary blade is increased.

[0022]

According to the present invention, since the rotating blade divided in the circumferential direction and the spacer are fitted to each other in a concave-convex manner, the rotating blade can be assembled and mounted on the shaft, and the worn or missing rotary blade can be removed. Exchange is quick and easy. By appropriately selecting the number of divisions of the rotary blade, the weight can be adjusted so that the rotary blade piece can be easily handled.

In this case, if the rotary blade piece is provided with a fitting groove or a projection, and the spacer is provided with a projection or a fitting groove, the two can be fitted with the concave and convex with a simple structure. Also, if the shaft is a shaft with a square cross section that is easy to process and the rotary blade is divided into two at the symmetrical position,
The number of parts is small and mounting and replacement are easy.

In addition, a spacer is integrally formed on one surface of the rotary blade to form a rotary blade with spacers, and the rotary blade with spacers is divided in the circumferential direction into a plurality of rotary blade pieces with spacers, and adjacent rotary blades are provided. If the rotary blade pieces are unevenly fitted at different division positions, two rotary blades with spacers can be easily mounted on the shaft. Since the spacer is incorporated in the rotary blade, the replacement of the rotary blade is quickened due to the reduction in the number of parts, and the labor involved is also saved.

In particular, if a nut is screwed into the shaft end and tightened to fix the rotary blade and the spacer or the rotary blade with spacer on the shaft, the fixing structure is simple and the fixing work is also simple. is there.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a case where a rotary blade piece and a spacer are mounted on a shaft according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part at the time of attachment.

FIG. 3 is a front view when half-broken rotary blade pieces are combined on an axis.

FIG. 4 is an exploded perspective view when a rotary blade piece with a spacer is mounted on a shaft according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part at the time of attachment.

FIG. 6 is a front view when a half-split rotary blade piece with a spacer is combined on an axis.

[Explanation of symbols]

 C ... Rotating blade 1 ... Shaft 2 ... Rotating blade piece 2a ... Blade portion 2b ... Engaging recess 2c ... Mating groove 3 ... Spacer 3a ... Mating hole 3b ... Protrusion 4 ... Screw shaft 6 ... Collar 7 ... Nut Ca ... Rotation Blade 2A: Rotary blade piece with spacer 02: Rotary blade piece 03: Spacer

Claims (7)

[Claims] 1. A shear crusher having a plurality of rotary blades arranged in a plurality of rows with a spacer interposed therebetween on a shaft of the shear crusher, wherein each rotary blade is divided in a circumferential direction into a plurality of rotary blade pieces. A shearing crusher characterized in that the rotary blade piece divided into at least one spacer and the adjacent at least one spacer are fitted in an uneven manner and each rotary blade is mounted on a shaft. 2. The shear crusher according to claim 1, wherein a fitting groove or projection is provided on the rotary blade piece, and a projection or fitting groove is provided on the spacer, and the two are unevenly fitted. 3. The shear crusher according to claim 1, wherein the shaft has a square cross section, and the rotary blade is divided into two at symmetrical positions. 4. In a shear crusher having a plurality of rotary blades arranged in a row on a shaft of the shear crusher with a spacer interposed therebetween, a rotary blade with a spacer formed integrally with a spacer on one surface of the rotary blade is divided in a circumferential direction. A plurality of rotary blade pieces with spacers, wherein adjacent rotary blade pieces with spacers are unevenly fitted at different dividing positions, and the rotary blades with spacers are mounted on a shaft. 5. A rotary blade piece with a spacer is provided with a fitting groove or projection on the side surface of the rotary blade piece portion and a projection or fitting groove on the side surface of the spacer portion, and adjacent rotary blades with spacers are irregularly fitted to each other. The shear crusher according to claim 4. 6. The shear crusher according to claim 4, wherein the shaft has a square cross section, and each rotary blade with a spacer is divided into two at symmetrical positions. 7. The shearing device according to claim 1, wherein a nut is screwed to the shaft end, and the nut is tightened to fix the rotary blade and the spacer or the rotary blade with the spacer on the shaft. Crushing machine.