JP2000189825A - Structure of rotary blade of crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the replacement of a cutter chip and to make the attaching strength sufficient while reducing the thickness dimension of a blade in the axial direction. SOLUTION: The outer periphery of a rotary blade main body 1 is formed into a polygonal shape to form cutter chip attaching surfaces and main body side recessed parts 2 opened in the axial direction and main body side projected parts 4 extending in a rotary direction are provided to the respective attaching surfaces. The cutter side projected parts engaged with the main body side recessed parts 2 in the rotary direction R and the cutter recessed parts engaged with the main body side projected parts 4 in the axial direction are provided to the attaching surfaces of cutter chips 11 and a plurality of bolt inserting holes are provided to the cutter chips 11 so as to be arranged in the rotary direction R and the cutter chips 11 are respectively threaded with the attaching surfaces of the rotary blade main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plurality of rotating blades used in a dust crusher or the like, which rotate in opposite directions.
The rotary blade includes a rotary blade main body and a cutter tip, and relates to a structure of a crusher rotary blade in which the cutter tip is detachably attached to the rotary blade main body.

[0002]

2. Description of the Related Art Conventionally, regarding the structure of a rotary blade used in a dust crusher or the like, the applicant of the present invention has published Japanese Utility Model Publication No. 57-2571.
No. 1, Japanese Utility Model Laid-Open No. 7-25943, Japanese Utility Model Laid-open No. 7-259
No. 44 and Japanese Unexamined Utility Model Publication No. 7-25945 disclose the technology.

FIGS. 4 and 5 show Japanese Utility Model Publication No. 57-2571.
No. 1 discloses a technique proposed. A plurality of concave cutter tip mounting seats 22 are provided on the outer periphery of the rotary blade main body 21, and a key groove extending in the circumferential direction is provided on the surface of the mounting seat 22, and a ring-shaped key is mounted. The cutter chip 25 is provided with a key groove 26 for engaging with the key on its mounting surface, and a bolt insertion hole 27 is provided on both sides of the key groove 26 in the axial direction. It is screwed. Thus, the cutter tip 25 is configured to receive the lateral load F by the key and the two bolts 28.

FIGS. 6 and 7 show actual open flat tires 7-25.
No. 943 discloses a technique proposed. The cutter tip mounting seat 22A on the outer periphery of the rotary blade body 21A is
It is provided in the radial direction, and a keyway 23A is provided in the radial direction on the mounting seat 22A surface. The cutter tip 25A is configured to be engaged with the key groove 23A of the rotary blade main body 21A by a key or an integrally formed protrusion 26A similarly to the above-described technique, and to receive a load by two bolts (not shown) on both sides thereof. Have been.

FIG. 8 and FIG.
No. 944 discloses a technique proposed. The cutter tip mounting seat 22B on the outer periphery of the rotary blade body 21B is
It is provided to be inclined with respect to a tangent line, and a circular convex portion 26B is protruded from a mounting surface of the cutter tip 25B. And, the mounting seat 22B of the rotary blade body 21B
The protrusion 26B of the cutter tip 25B fits into the recess 23B formed in the hole, and is screwed into the center screw hole with a bolt.

However, in the structure of these rotary blades, it is necessary to sufficiently support the load and to reduce the thickness of the blade to a certain value or less, because the uneven portion (key) for supporting the lateral load and the mounting bolt (front 2) are required. Of two people were side by side).

[0007] In addition, a technique relating to a shredder capable of dividing the cutting edge portion is disclosed in Japanese Utility Model Publication No. 7-53712, but it cannot solve the problem of the lateral mounting strength of the cutter tip. .

[0008]

SUMMARY OF THE INVENTION According to the present invention, the cutter tip can be easily replaced and the mounting strength is sufficient.
Moreover, it is an object of the present invention to provide a crusher rotary blade structure capable of reducing the axial thickness of the blade.

[0009]

According to the present invention, there is provided a rotary blade having a plurality of rotary blades rotating in opposite directions, the rotary blade comprising a rotary blade body and a cutter tip, and the cutter tip being a rotary blade. In the structure of the crusher rotary blade detachably attached to the main body, the outer periphery of the rotary blade main body is formed in a polygonal shape with a cutter chip mounting surface, and the main body side concave portion opened in the axial direction on each mounting surface and the rotation. The cutter tip is provided with a cutter-side protrusion that engages with the body-side recess on the mounting surface thereof and locks in the rotation direction, and an axial direction that engages with the body-side protrusion. A plurality of bolt insertion holes are arranged in the rotation direction, and a cutter tip is screwed to each mounting surface of the rotary blade body.

Since the present invention is configured as described above, the connection between the rotary blade main body and the cutter tip is such that the main body concave portion and the cutter side convex portion engage with each other in the rotating direction in which a load is applied. It has a sufficient strength because it is firmly connected with a large distance between the mounting bolts and against the moment. In addition, the main body-side protrusion and the cutter-side recess engage with each other with respect to the load in the lateral direction of the cutter tip, so that this also has sufficient strength. Since the number of mounting bolts is one in the axial direction, the thickness of the cutter tip in the axial direction can be reduced together with the thickness of the rotary blade body. The replacement of the cutter tip can be easily performed by attaching and detaching the mounting bolt.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a rotary blade main body 1 and FIGS. 2 and 3 show a cutter tip 11. The outer periphery of the disk-shaped rotary blade main body 1 having the hexagonal hole 1a is formed in an octagonal shape so that eight cutter tips 11 are mounted in the illustrated example. A body-side recess 2 which is open in the axial direction, and a body-side protrusion 4 which extends in a T-shape in the rotational direction R rearward at right angles to the axial protrusion 3 which forms one wall surface of the recess 2. Is provided. The dashed line in FIG. 1 indicates the outer diameter of the spacer.

On the mounting surface of the cutter tip 11, a cutter-side protrusion 12 which engages with the body-side recess 2 of the rotary blade body 1 and locks in the rotation direction, and a body-side protrusion 4 which engages with the body-side protrusion 4. A cutter-side recess 13 is provided for locking in the axial direction, and a groove 14 is provided to escape the axial protrusion 3 of the main body. In addition, the groove portion 14 also includes a relief of R at a corner between the convex portion 4 of the main body 1 and the axial convex portion 3.

Further, bolt insertion holes 15 and 16 are formed on both sides of the groove 14 in the rotation direction R. The bolt insertion holes 15 and 16 are formed to have two steps with an inner diameter of two steps, and the step is screwed into a screw hole of the rotary blade main body 1 as a seat for a bolt (not shown).

With such a configuration, the cutter tip 1
The first convex portion 12 bears the load in the rotational direction, and both sides of the concave portion 13 behind the rotational direction bear the lateral load, and the width dimension W of the cutter tip 11 is the same as the width of the rotary blade body 1. It has dimensions.

Therefore, the rotary blade main body 1 and the cutter tip 11 are firmly connected, and have a sufficient strength against a rotating moment with a large load due to a large interval between the mounting bolts. Smaller bolts can be used. Since the bolts are arranged in one row in the axial direction, both the axial dimension of the cutter tip 11 and the thickness of the rotary blade main body 1 can be reduced.

[0016]

The present invention is configured as described above and has the following effects. (1) Both the thickness of the rotary blade main body and the axial thickness of the cutter tip can be reduced. (2) The rotary blade main body and the cutter tip are firmly connected. (3) Replacement of the cutter tip is easy.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the rotary blade of the present invention, and also shows a developed view of a mounting portion.

FIG. 2 is a perspective view showing one embodiment of the cutter tip of the present invention as viewed obliquely from below.

FIG. 3 is a perspective view of the cutter tip of FIG. 2 as viewed obliquely from above.

FIG. 4 is a side view showing a conventional rotary blade cutter tip mounting structure.

FIG. 5 is a perspective view of the cutter tip of FIG. 4;

FIG. 6 is a side view showing another conventional rotary blade cutter tip mounting structure.

FIG. 7 is a perspective view of the cutter tip of FIG. 6;

FIG. 8 is a side view showing still another conventional rotary blade cutter tip mounting structure.

FIG. 9 is a perspective view of the cutter tip of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotary blade main body 2 ... Body side recessed part 4 ... Body side convex part 11 ... Cutter tip 12 ... Cutter side convex part 13 ... Cutter side concave part 15, 16 ... Bolt Insertion hole

Claims (1)

[Claims] 1. A crusher having a plurality of rotating blades rotating in opposite directions, the rotating blades comprising a rotating blade body and a cutter tip, the cutter tip being detachably attached to the rotating blade body. In the structure of the rotary blade, the outer periphery of the rotary blade main body is formed with a polygonally shaped cutter chip mounting surface, and each mounting surface is provided with a main body side concave portion opened in the axial direction and a main body side convex portion extending in the rotational direction. The cutter tip is provided on its mounting surface with a cutter-side protrusion that engages with the body-side recess and locks in the rotation direction, and a cutter-side recess that engages with the body-side protrusion and locks in the axial direction. ,
A structure of a rotary blade of a crusher, wherein a plurality of bolt insertion holes are arranged in a rotation direction and a cutter chip is screwed to each mounting surface of the rotary blade body.