JPH07136533A - Crusher - Google Patents

Abstract

PURPOSE:To easily perform a repair work of a rotor plate in a short time which is worn in a crusher in which scraps, etc., are crushed by hammers fitted to the rotor plate. CONSTITUTION:A rotor plate 10 arranged in multiple stage is divided into an outer peripheral plate 14 to which crushing hammers 12 are and an inner peripheral plate 13 connected to a rotating shaft 4. Both the plates 13, 14 are attachably and detachably fixed by tightening bolts 22. When the outer peripheral plate 14 is worn, it is removed from the inner peripheral plate 12 and replaced with a new one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing device for crushing metal scrap or the like.

[0002]

2. Description of the Related Art As a crushing apparatus for crushing large-sized dust such as electric appliances and scrap metal such as discarded automobiles, there is a conventional one as shown in FIG.

In this crushing device, a plurality of rotor plates 43 are attached to the peripheral surface of a rotary shaft 42 projecting inside the crushing chamber 41 at predetermined intervals in the lengthwise direction of the rotary shaft, and the rotor plates 43 of each rotor plate 43 are mounted. Pin 4 that penetrates each rotor plate in the axial direction on the outer peripheral portion
4 is attached, and a crushing hammer 45 is rotatably attached to each pin 44.

Each crushing hammer 45 is attached so that a part thereof protrudes from the outer peripheral edge of each rotor plate 43, and when the rotating shaft 42 rotates, the crushing hammer 45 and the crushing chamber 41.
It is designed to hit scrap that has been thrown into and out of the surface and crush it.

[0005]

In the above-mentioned crushing apparatus, the crushed scrap is strongly rubbed against the surface of the outer peripheral portion of each rotor plate 43 to which the crushing hammer 45 is connected, and the rotating hammer 45 makes sliding contact. Moreover, the occurrence of wear is severe.

When the surface of each rotor plate 43 is worn in this way, the conventional rotor plates are integrally formed, so that each rotor plate 43 is completely removed from the rotary shaft 42.
Repairs are performed with the crushing device disassembled.

In this case, as a repairing method, the worn outer peripheral portion of the rotor plate 43 is cut, and a new outer peripheral member that replaces the worn outer peripheral portion is welded to the cut portion to integrate the rotor plate 43. There is a method of cutting the surface of the outer peripheral portion of 43 to scrape off the worn portion.

However, the above-mentioned repair work requires considerable skill and experience in welding and the like, so there is a problem that it is difficult to secure human resources and stably obtain the repaired shape or accuracy.

Further, since the crushing device is stopped during the repair period of the rotor plate 43, there is a problem that the operating rate of the device is lowered.

On the other hand, if the spare parts for the entire rotor plate 43 are prepared in advance, it is possible to avoid the stoppage of the crushing device. However, this method increases the number of spare parts and increases the cost. There is.

The present invention has been made in order to solve the above problems, and can repair a worn rotor plate by a simple method, and can minimize the stopped state of the device and increase in equipment cost. Is intended to provide.

[0012]

In order to solve the above-mentioned problems, the present invention is directed to a plurality of rotors on a peripheral surface of a rotary shaft projecting inside a crushing chamber at predetermined intervals in the longitudinal direction of the rotary shaft. A plate is attached, and a plurality of pins that penetrate each rotor plate in the axial direction are attached to the outer peripheral portion of each rotor plate.
A crushing hammer partially protruding from the outer peripheral surface of each rotor plate is rotatably attached, and each rotor plate is divided into an outer peripheral plate connected to the crushing hammer and an inner peripheral plate connected to the rotary shaft. It was detachably fixed by the fixing means.

In the above structure, the outer peripheral plate may be divided into a plurality of members in the circumferential direction.

According to the second means of the present invention, the number or the arrangement size of the mounting holes of the pin for mounting the crushing hammer is made different for each of the plurality of outer peripheral plates,
Each outer peripheral plate is configured to be attachable to and detachable from one inner peripheral plate.

[0015]

In the above construction, when the outer peripheral portion of the rotor plate wears due to the crushing process, the outer peripheral plate is removed from the inner peripheral plate and replaced with a new outer peripheral plate. Further, if only the outer peripheral plate is made of a high hardness material or the surface is subjected to abrasion resistance treatment, the durability life of the rotor plate can be improved and the repair cycle can be lengthened.

Further, if the outer peripheral plate can be divided in the circumferential direction, the outer peripheral plate can be attached from the outside to the inner peripheral plate attached to the rotary shaft, so that the replacement work can be simplified.

On the other hand, when the second means is adopted, the outer plates having different numbers and arrangement dimensions of the crushing hammers are selected and attached to the rotor plate according to the amount and size of the scraps to be crushed. It is possible to control the particle shape and the throughput of the product within an appropriate range.

[0018]

1 to 5 show an embodiment of the present invention. As shown in FIGS. 1 to 3, the crushing chamber 1 has a charging port 2 in the upper part thereof, and a large number of ridges 3 for crushing action are provided on a circumferential surface which is tapered toward the charging port 2. Is formed, and the upper half portion of the rotating shaft 4 projects in the center of the inside of the crushing chamber 1.

A flywheel 5 is attached to the lower end of the rotary shaft 4, and a drive motor (not shown) is connected to the flywheel 5 via a belt or the like, and is rotationally driven by the operation of the drive motor. It

Further, the rotary shaft 4 has a rotor support 7 mounted on the peripheral surface of the central portion thereof via a key 6 and a scrap breaker 8 mounted on the upper end thereof. The scrap breaker 8 and the rotor support 7 are connected to each other. A crushing rotor 9 is attached between them.

The crushing rotor 9 includes a plurality of (three in this example) rotor plates 10 arranged at predetermined intervals in the lengthwise direction of the rotating shaft 4, and a plurality of rotor plates 10 mounted on the outer periphery of each rotor plate 10. The hammer pins 11 and the crushing hammers 12 rotatably attached to the hammer pins 11.

As shown in FIGS. 2 to 4, each rotor plate 10 has an inner peripheral plate 1 which is connected to a rotary shaft 4.
3 and a ring-shaped outer peripheral plate 14 to which the hammer pin 11 is connected. The inner peripheral plate 13 is integrally fixed to the sleeve 15 fitted to the rotating shaft 4 by welding or the like. . In addition, each inner peripheral plate 1
During the time period 3, the space is held by the space holding ring 16.

On the other hand, the outer peripheral plate 14 is divided into two in the circumferential direction.
It is configured to be divided into two half members 14a and 14b, and a plurality of pin mounting holes 17 for mounting the hammer pins 11 are formed in each of the half members 14a and 14b.

Positioning projections 18 and grooves 19 are formed on both ends of the half members 14a and 14b for vertically fitting with each other, and the projections 18 and the grooves 19 are fitted to each other. By connecting 14a and 14b, the outer peripheral plate 14 positioned in a predetermined ring shape is obtained.

A flange 20 is formed along the inner peripheral surface of each of the half members 14a and 14b, while the outer peripheral surface of each inner peripheral plate 13 has a flange 21 with which the flange 20 engages. When both flanges 20 and 21 are overlapped with each other and are fixed by fastening bolts 22, the inner peripheral plate 13 and the outer peripheral plate 14 are fixed concentrically.

As shown in FIGS. 2 and 3, the crushing hammer 12 mounted on the outer peripheral plate 14 has a large number of protrusions 23 formed on the outer peripheral surface thereof, and a portion of the protrusion 23 is always outside the outer peripheral surface of each rotor plate 10. It is mounted so as to project into.

In the crushing rotor 9 having the above structure, the rotation of the rotary shaft 4 is transmitted to the rotor support 7 via the key 6, and the inner peripheral plate 13 is transmitted from the rotor support 7 via the pins 24 and 25 and the spacer plate 26. And each rotor plate 10 and the crushing hammer 12 rotate integrally. Also,
Rotational force is transmitted from the rotor plate 10 to the scrap breaker 8 via the upper pin 27 and the spacer plate 28, and the rotating breaker 8 first cuts the scrap introduced into the crushing chamber 1 into a large amount, and the inner circumference of the crushing chamber 1 is cut. It is dropped between the surface and the crushing rotor 9.

Further, a plurality of sweeper liners 29 are attached to the spacer plate 26 below the crushing rotor 9, and the crushed scraps are sequentially discharged at the lower discharge port of the crushing chamber 1 by rotating the sweeper liners 29. It is discharged from 30 to the outside.

The crushing device of this embodiment is constructed as described above. When scrap is put into the crushing chamber 1 through the charging port 2, the scrap is roughly cut by the breaker 8 and then the crushing chamber 1 is cut. Finely crushed by a crushing hammer 12 rotating between the inner peripheral surface of the rotor and the rotor plate 10,
It is discharged from the discharge port 30 to the outside.

In the above crushing work, each rotor plate 10 is brought into contact with the scrap and the crushing hammer 12 by contacting them.
When the outer peripheral plate 14 is worn, the fastening bolts 22 are removed to divide the outer peripheral plate 14 and the inner peripheral plate 13,
Replace with a new outer peripheral plate 14.

The replacement of the outer peripheral plate 14 is carried out by inserting the half-split members 14a and 14b into the outer periphery of the inner peripheral plate 13 from the outside at the position of each inner peripheral plate 13 attached to the rotary shaft 4. Can be easily assembled. That is, the inner peripheral plate 13 can be replaced without being disassembled from the rotary shaft 4, and the work can be performed in a short time.

Further, the outer peripheral plate 14 and the inner peripheral plate 1
Since the 3 is divided, the outer peripheral plate 1 that causes wear
By forming 4 with a high hardness material or by applying a hard surface treatment or a surface coating layer, the durability life of the outer peripheral plate 14 can be remarkably improved and the interval of the above replacement work can be lengthened.

In the above structure, the outer peripheral plate 1 for replacement is used.
Since only 4 need be prepared in advance, spare equipment can be simplified and equipment cost can be reduced as compared with the conventional structure in which it is necessary to prepare each rotor plate as a whole.

Further, the number of pin mounting holes 17 and the arrangement size (each mounting hole 17 are formed in advance) for each of a plurality of outer peripheral plates 14 having the same diameter of the inner peripheral surface connected to the inner peripheral plate 13. If different pitch circle diamonds are formed, the number and arrangement shape of the crushing hammers 12 suitable for crushing scrap are provided from the plurality of types of outer peripheral plates 14 according to the shape and type of scrap to be crushed. The outer peripheral plate 14 can be arbitrarily selected. That is, it becomes possible to select the optimum crushing conditions according to the scrap to be crushed, the shape accuracy of the scrap grain shape can be made constant, and the throughput can be stabilized.

By the way, the fastening bolts 22 for connecting the outer peripheral plate 14 and the inner peripheral plate 13 of each rotor plate 10 are
It is necessary to have a function of stably holding both plates 13 and 14 in a fixed state during the crushing process. In this case, as a method of protecting the bolt 22 by maintaining the fastening state against contact with scraps acting on the bolt 22 during processing and the impact force of the crushing hammer, a device shown in FIG. 5 can be considered.

The method shown in FIG.
In FIG. 5 (b), the nut 32 is attached to the spring washer 33 and the spring washer 33.
The rotation is stopped by the nut 34.

The method shown in FIG. 5 (c) uses the fastening bolt 2
The washer 35 placed on the upper part 2 is fixed by welding, and the washer 35 protects the bolt 22 and prevents it from rotating.

In the above embodiment, the outer peripheral plate 1
Although 4 is divided into two half members 14a and 14b in the circumferential direction, it may be divided into three or more members in the circumferential direction.

Further, although the halves 14a and 14b are aligned with each other by fitting the projections 18 and the grooves 19 provided at the ends of the respective members, a knock pin or the like is used for the inner peripheral plate 13. The half members 14a and 14b may be positioned.

Further, the crushing rotor 9 is not limited to the one in which the three rotor plates 10 as shown in the figure are laminated in a multi-stage,
A structure in which five or more rotor plates 10 are combined may be used.

[0041]

As described above, according to the present invention, the rotor plate can be divided into the outer peripheral plate and the inner peripheral plate, and only the worn outer peripheral plate is replaced. Therefore, the repair work of the rotor plate can be easily performed in a short time. Therefore, the equipment cost for repair can be kept low.

Further, when a plurality of types of outer peripheral plates having different numbers of pin mounting holes and arrangement dimensions are prepared in advance, it is possible to select an appropriate number and arrangement shape of the crushing hammers according to the shape of scrap or the like to be crushed. It is possible to improve the grain shape and the throughput of the crushed material.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a crushing device according to an embodiment.

FIG. 2 is a cross-sectional view showing an enlarged main part of the above.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view showing a rotor plate in a divided state.

5 (a), (b) and (c) are cross-sectional views showing a method for preventing the fastening bolt from rotating.

FIG. 6 is a vertical sectional front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crushing chamber 4 Rotating shaft 9 Crushing rotor 10 Rotor plate 11 Hammer pin 12 Crushing hammer 13 Inner peripheral plate 14 Outer peripheral plates 14a, 14b Half split member 17 Pin mounting hole 18 Projection 19 Groove 22 Fastening bolt

Claims (3)

[Claims] 1. A plurality of rotor plates are attached to a peripheral surface of a rotary shaft projecting inside the crushing chamber at predetermined intervals in a length direction of the rotary shaft, and each rotor plate is attached to an outer peripheral portion of each rotor plate. Attach a plurality of pins that pass through in the axial direction,
In a crushing device in which a crushing hammer partially protruding from the outer peripheral surface of each rotor plate is rotatably attached, each rotor plate is divided into an outer peripheral plate connected to the crushing hammer and an inner peripheral plate connected to a rotating shaft. The crushing device is characterized in that both plates are detachably fixed by a fixing means. 2. The crushing device according to claim 1, wherein the outer peripheral plate can be divided into a plurality of members in the circumferential direction. 3. The number or arrangement dimension of the mounting holes of the pin for mounting the crushing hammer is formed to be different for each of the plurality of outer peripheral plates, and each outer peripheral plate is set to 1
The crushing device according to claim 1 or 2, wherein the crushing device is configured to be attachable to and detachable from one inner peripheral plate.