JPS62204864A - Crushing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a crusher for, for example, solid waste.

(Prior Art) Conventionally, in order to crush solid waste such as steel scrap tires, a crusher as shown in Japanese Patent Publication No. 55-23668 filed by the present applicant has been proposed.

That is, a pair of rotary blades that rotate in opposite directions about parallel axes to crush objects to be crushed are supported on the stationary side of the crusher. Each of the above-mentioned rotary blades is composed of a cutter holder that is supported via a rotating shaft on the stationary side of the crusher, and a cutter that is a rotary blade body that is detachably attached to the radial outer end of each of these cutter holders. The cutters in are placed close to each other in the axial direction of this rotary blade.

The object to be crushed is then sheared by opposing cutters that rotate in opposite directions to crush the object to a predetermined particle size.

In the crusher having the above configuration, the crushing performance is greatly influenced by the gap between the two vines in the axial direction of the rotary blade, so-called force/interval clearance. Therefore, it is necessary to adjust the cutter clearance to a predetermined narrow gap (for example, within 0 to 0.1 mm). Conventionally, when a cutter wears out due to crushing, this worn surface is polished, and a shim is separately manufactured to cover the reduced thickness of the cutter, and this shim is inserted between the cutter and the cutter holder. The cutter clearance was adjusted to a predetermined narrow gap by bringing the vines closer together.

(Problems to be Solved by the Invention) However, since the above-mentioned cutter clearance requires high precision, skill is required to manufacture the shim.1. The manufacturing work is complicated. Further, the work of interposing a shim between the cutter and the cutter holder inside the crusher is extremely complicated because the surplus space is small inside the crusher.

(Object of the Invention) The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a crusher in which the cutter clearance can be easily adjusted.

(Structure of the Invention) The present invention for achieving the above object is characterized in that at least one of the pair of rotary blades in the crusher is movable in the axial direction, and one end of the rotary blade in the axial direction A screw member is screwed onto the stationary side of the crusher located at the stationary side of the crusher, and the rotary blade is moved in the axial direction in conjunction with the movement of the screw member by a screwdriver operation.

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

In the figure, this figure shows a part of the crusher ml, which crusher a1 has a housing 2 which is the stationary side of the crusher. The housing 2 has a pair of parallel first
, a second rotating shaft 3.4 is supported in the housing 2, and a second rotating shaft 51.4 is supported on both rotating shafts 3.4. A plurality of second rotary blades 5.6 are supported.

The first and second rotating blades 5.6 are connected to the first and second rotating shafts 3, 4.
The cutter holders 7.7 each have a cutter holder 7 keyed to the cutter holders 7.7, whose radially outer ends overlap each other when viewed in the axial direction. And the facing surfaces of the radially outer ends of these double-strength vine holders 7.7? A cutter 8.8, which is a rotary blade main body, is screwed to a and 7a by a port 10, respectively. These cutters 8.8 are placed close to each other in the axial direction of the rotary blade 5.6 so that the cutter clearance between them is a predetermined narrow gap.

Here, for convenience of explanation, the following description will be made assuming that the arrow R in the figure is on the left and the arrow R is on the right.

Among the re-rotated blades 5.6, the first rotary blade 5 is the second rotary blade 6.
The cutters 8.8 are located to the right of the rotary blade 5.6, and the contact between the corresponding cutters 8.8 prevents these two cutters 8.8 from overlapping each other in the axial direction of the rotary blade 5.6.

The material to be crushed, which is supplied between the two rotary blades 5 and 6, is sheared by opposing cutters 8 and 8 that rotate in opposite directions, and is crushed into a predetermined particle size.

In the above case, each cutter 8 has the opposing surface 7a of the cutter holder 7.
They are each screwed to the cutter holder 7 by ports 10 that pass through the cutter holder 7 from the opposite side. For this reason, compared to the conventional case where the cutters 8 were screwed to the cutter holder 7 by a port passing through the ivy 8 from the opposing surface side, when the cutter 8 wears out, the amount of polishing is reduced by the amount of polishing on the head of the port 10. This can be done without considering the height. Therefore, even if these cutters 8 have the same thickness, their lifespan can be extended by about 1.5 to 2 times. In addition, when crushing the object to be crushed, the surface where the cutter 8 comes into contact with the object becomes highly heated. Although cracks are more likely to occur, Porto 10
Since the hole for accommodating the head of the cutter is formed in the cutter holder 7 on the side opposite to the contact surface, the above-mentioned quench cracking can be prevented.

Furthermore, since the cutter 8 has a rectangular parallelepiped shape, this ivy 8 has no directionality in the axial direction of the rotary blade 5.6. The polishing cost and replacement time can be reduced, and the manufacturing cost of this cutter 8 can be reduced.

Furthermore, in the above configuration, of the two rotating shafts 3 and 4, the first rotating shaft 3 is supported by the housing 2 with its axial movement restricted, and the second rotating shaft 4 is allowed to move freely in its axial direction. It is supported by the housing 2.

That is, on the same axis as the first rotating shaft 3, l\Using 2
A bearing hole 11 is formed in the bearing hole 11, and the end portion of the first rotating shaft 3 is supported by a thrust bearing 12 and a radial roller bearing 13, which are arranged side by side on the inner peripheral surface of the bearing hole 11. Further, a spacer 14 is interposed between each inner race of both bearings 12 and 13, and a nut 15 is provided at the shaft end of the first rotating shaft 3.
is screwed on. The outer race of the radial roller bearing 13 contacts the step surface 11a formed in the bearing hole 11, and the rightward movement of the radial roller bearing 13 is restricted.
are in contact with each other. This restricts the first rotating shaft 3 from moving further to the right.

On the other hand, on the same axis as the second rotating shaft 4 /%Using 2
A bearing hole 16 is formed in the shaft 732, and the end of the rotating shaft 4 has thrust bearings 1 arranged side by side on the inner peripheral surface of the bearing hole 16.
7 and a radial roller bearing 18. Both bearings 17 and 18 are slidable in the axial direction on the inner circumferential surface of the bearing hole 16, thereby allowing the second rotating shaft 4 to move in the axial direction.

A spacer 19 is interposed between the inner races of both bearings 17 and 18, and the inner race of the radial roller bearing 18 is in contact with a stepped surface 4a formed on the second rotating shaft 4.

A flange 20 having an internal thread is screwed to the opening edge of the bearing hole 16 on the outer surface of the housing 2 by a port 21 coaxially with the second rotating shaft 4 . A cylindrical screw member 22 is screwed into this flange 20, and the right end of this screw member 22 is in contact with the seventh outer race of the thrust bearing 17. Therefore, this screw member 22 is attached to the flange 2.
If you screw it in to 0, the thrust bearing 17. The spacer 19 and the radial roller bearing 18 push the stepped surface 4a of the second rotating shaft 4 to the right, and the second rotating shaft 4 is moved to the right. By this movement, the cutter clearance between both vines 8.8 is adjusted. Note that a stepped surface 16a is formed on the inner circumferential surface of the bearing hole 16 in correspondence with the outer race of the radial roller bearing 18. For this reason,
If the outer race of the radial roller bearing 18 comes into contact with this stepped surface 16a when the second rotating shaft 4 moves to the right, further rightward movement of the second rotating shaft 4 is restricted.

Further, a plurality of small holes 26 are formed in the right end surface of the screw member 22, and a spring 27 is provided in each of the small holes 26 to urge the second rotating shaft 4 toward the right. This spring 27 causes the double-sided vines 8.8 to be elastically connected.

A plurality of lock grooves 28 are formed at the left end of the flange 20 and extend in the radial direction. Moreover, lock grooves 29 extending in the radial direction are formed at the left end of the screw member 22 at equal intervals in the circumferential direction. When the screwing operation of the screw member 22 is completed, the double-ended screw grooves 28.
A lock plate 30 is provided which is removably fitted so as to span 29. This lock plate 30 is screwed to the flange 20 by a port 31. and,
This restricts the rotation of the screw member 22.

When adjusting the cutter clearance between both cutters 8 and 8 in the above-mentioned double transmission forces 5 and 6, first, the threaded member 22
This screw member 22 is screwed in by a screwdriver operation. In this case, this operation is performed by grasping the left end of the screw member 22 protruding outside the housing 2 and turning it. In conjunction with the movement of the second rotary shaft 4 by this operation, the second rotary blade 6 also moves to the right in the axial direction.

Furthermore, when the screw member 22 is screwed in and the cutter 8 of the second rotary blade 6 comes into contact with the cutter 8 of the first rotary blade 5, the cutter clearance becomes a predetermined gap (0.02 to 0.1 mm).
Unscrew the screw member 22 by a predetermined rotation so that The rotation of the member 22 is restricted.

This completes the cutter clearance adjustment and maintains the ivy clearance.

In this case, the second rotary blade 6 is biased by the spring 27 so as to come into contact with the first rotary blade 5, but when crushing the object to be crushed, the object to be crushed is caught between the two rotational forces 5.6. As a result, the second rotary blade 6 is pushed toward the left, and the vine clearance in this direction becomes a predetermined gap. For this reason, the cutters are in contact with each other as in the conventional case, and this prevents the inconvenience of receiving a large impact when crushing the object and damaging the cutter and each bearing due to this impact. Moreover, on the contrary, it is also prevented that the shearing force of the cutter decreases due to exceeding a predetermined cutter clearance.

(Effects of the Invention) According to the present invention, at least one of the pair of rotary blades in the crusher is movable in the axial direction, and the portion of the rotary blade on the stationary side of the crusher located at one end in the axial direction A screw member is attached to the screw member, and the rotary blade moves in the axial direction in conjunction with the movement of the screw member by the screwdriver operation. Therefore, when adjusting the cutter clearance between the pair of rotary blades, simply tighten the screw member. The cutter clearance can be set to a predetermined value by turning the screw a predetermined number of times.

Therefore, there is no need for the skill to manufacture highly accurate shims, which was conventionally required to adjust the cutter clearance, and there is also no need for shim manufacturing work or shim insertion work. In this way, the iA adjustment work for the ivy clearance can be made easier.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a partial sectional view of a crusher, Fig. 2 is a view taken along the line II-II in Fig. 1, and Fig. 3 is a partially enlarged view of Fig. 1. . 1... Crusher, 2... Housing (crusher stationary side), 3
・・First rotating shaft, 4ψ・Second rotating shaft, 5・・First rotating blade, 6・・Second rotating blade, 8・・Cutter (rotary blade main body), 2
2...Screw member.

Claims (1)

[Claims] 1. A pair of rotary blades that rotate in opposite directions around parallel axes to crush objects to be crushed are supported on the stationary side of the crusher, and the rotary blade bodies provided at the radial outer ends of these two rotary blades are connected to each other. In a crusher in which the rotary blades are placed close to each other in the axial direction, at least one of the rotary blades is movable in the axial direction, and a screw member is screwed to the stationary side of the crusher located at one end of the rotary blade in the axial direction. A crusher characterized in that the rotary blade moves in the axial direction in conjunction with the movement of the screw member by a screwdriver operation.