JP2003205249A - Tooth for crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the falling-off of a tooth used for a crusher, and to enable the easy replacement of a worn-out tooth. <P>SOLUTION: A main tooth 15 for the crusher comprises; a fixed base 31 mounted to the outer circumferential surface of a drum 4; a tooth part 32 put on the fixed base 31; a joint pin 33 for fixing the tooth part 32 to the fixed base 31; and a gum sleeve 40 provided on the outer peripheral part of the joint pin 33. Through-holes 36 and 38 are bored in the fixed base 31 and the tooth part 32, respectively to make the joint pin 33 pass through. Annular grooves 39 are formed on the outer periphery of both ends of the joint pin 33, and a pair of opposed rings 44 are fitted into both grooves 39 on both sides of the sleeve 40. An annular raised ridge 41 projected in and outside the sleeve 40 is formed, and the outer periphery of the through-hole 36 of the fixed base 31 and of the joint pin 33 are formed with annular recessed parts 42 and 43, respectively, to which the annular raised ridge 41 is fitted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing waste materials such as concrete and asphalt for paving, and more particularly to a tooth structure used in such a crusher.

[0002]

2. Description of the Related Art Generally, concrete and asphalt are often used as civil engineering and construction materials, but these materials are discharged in large amounts as waste materials through repairs and demolition work. Most of them are usually crushed to a required size and reused as landfill sand, etc., but many crushers have been put to practical use as a device for crushing such kind of waste material. Here, the structure of the crusher is generally one in which a drum having a large number of teeth on the outer peripheral surface is provided in parallel with a plate-shaped fixed blade, or two such drums are arranged in parallel. . However, in the conventional crusher, since the teeth provided on the outer peripheral surface of the drum are firmly attached by welding or the like, there is a problem that it is difficult to repair or replace the tooth tips when they wear.

Therefore, the applicant of the present application filed Japanese Patent Application No. 5-3098.
We have proposed a crusher tooth with removable tooth tips, as in No. 4, and have put it into practical use. The tooth (main tooth) is generally a fixed base (supporting portion) mounted on the outer peripheral surface of the drum,
A tooth portion which is detachably attached to the fixed base and constitutes a tooth tip; and a pin which connects the tooth portion and the fixed base,
A rubber sleeve (pinned tube) is provided on the outer peripheral portion of the coupling pin as a retaining and cushioning function.

In the above tooth, the elastic sleeve relieves the shear stress acting on the pin, so that the pin does not break, and when the tooth wears, the pin is pulled out to remove the tooth. It is widely used because it can be easily replaced.

[0005]

However, according to the above-mentioned tooth, the sleeve is deteriorated due to long-term use and the pin is pulled out, which causes the tooth portion to fall off during the crushing process of the waste material. There was an occasion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a crusher tooth having removable tooth portions to prevent the tooth portions from falling off during the crushing process. is there.

[0007]

In order to achieve the above object, the present invention comprises a fixed base mounted on the outer peripheral surface of a drum,
A crusher comprising a tooth portion which covers the fixed base and a connecting pin for fixing the tooth portion to the fixed base, and through holes formed in the fixed base and the tooth portion for passing the connecting pin respectively. In the tooth insert, annular groove portions are formed on the outer circumferences of both ends of the coupling pin, and opposed rings sandwiching the fixed base are fitted in both groove portions.

Further, as a more preferable aspect of the present invention, a fixed base mounted on the outer peripheral surface of the drum, a tooth portion covered with the fixed base, and a coupling pin for fixing the tooth portion to the fixed base. A crusher tooth having a rubber sleeve provided on an outer peripheral portion of the connecting pin, wherein the fixing base and the tooth portion are provided with through-holes for passing the connecting pin, respectively. An annular groove is formed on the outer periphery of the part, and a pair of rings facing each other with the sleeve sandwiched are fitted in both of the grooves, and both ends of a through hole formed in the fixed base are used as seats for receiving the ring. And the sleeve forms an annular protrusion protruding inward and outward, and an annular protrusion for fitting the protrusion to the through hole of the fixed base and the outer periphery of the coupling pin, respectively. Wherein the part is formed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic front view showing such a crusher, and FIG. 2 is a plan view thereof. First, in FIG. 1, reference numeral 1 is a frame formed by joining structural steels and the like, and a hopper 2 for throwing waste materials such as concrete is provided at the uppermost portion thereof, and below the hopper 2, A crushing chamber 3 communicating with each other is formed. The crushing chamber 3 is provided with a pair of rotatable drums 4 and 4 arranged in parallel at regular intervals. The drum 4 crushes the waste material put into the hopper 2, and the crushed material is crushed. It is configured to be discharged to the outside of the machine through a chute 5 formed below the device 3. The drums 4 have individual drive sources 6 (motors), which are powered by the drive sources 6 through the speed reduction mechanism, and are directed in opposite directions so as to draw the waste materials thrown into the hopper 2 between them. Is rotated.

In this embodiment, the reduction mechanism mainly comprises a gear type speed reducer 7 having an input / output shaft, and a sprocket 8A attached to the input shaft and a sprocket 8B attached to the output shaft of the drive source 6 are connected by a chain 9. The sprocket 8C attached to the output shaft of the reduction gear 7 and the sprocket 8D attached to the rotary shaft of the drum 4 are connected to each other and connected to the chain 10
The speed reduction ratio is 1/10.
It is set to a degree. In addition, 11 and 12 are chain covers.

Next, in FIG. 2, reference numeral 13 is a guide plate provided in the hopper. The guide plate 13 guides the waste material put into the hopper 2 between the drums 4 and 4, respectively. Is provided in a slanted shape from both sides of the inner part to the inner part. Further, as is apparent from FIGS. 2 and 3, several kinds of crushing teeth 14 are provided on the outer peripheral surface of the drum 4. In this example, the crushing tooth 14 includes a main tooth 15 forming an essential part of the present invention, an auxiliary tooth 16 having a prismatic shape, and a flat small tooth 17 having a corrugated surface. Are arranged in the circumferential direction and the axial direction. In particular, the main teeth 15 and the auxiliary teeth 16 are arranged at a predetermined angle with respect to the axis of the drum 4, and the auxiliary teeth 16 and the small teeth 17 are brazed to the outer peripheral surface of the drum 4, respectively. Fixed. The small teeth 17 mainly serve to prevent wear of the outer peripheral surface of the drum 4.

On the other hand, as is apparent from FIG. 3, the rotary shaft 4A of the drum 4 is horizontally supported on both sides by radial bearings 18 fixed to the partition 3A of the crushing chamber 3. Particularly, the color plate 19 and the radial bearing 1 are provided on one end side of the rotating shaft 4A.
8, a thrust bearing 20, and a bearing cover 21 are sequentially provided, and a collar plate 19, a radial bearing 18, a collar plate 22, a thrust bearing 20, a sprocket 8D, and an end plate 23 are provided on the other end side of the rotating shaft 4A. They are provided in order. As a result, the movement of the drum 4 in the axial direction is restricted, and the drum 4 smoothly rotates without generating a frictional noise. Further, on the inner surface of the partition wall 3A forming the crushing chamber 3, side plates 24 having a semi-arcuate shape that cover the upper portions on both sides of the drum 4 are fixed, thereby preventing bite of the crushed material from both ends of the drum 4. I am doing it.

Next, the structure of the main tooth forming the crusher tooth according to the present invention will be described in detail. FIG. 4 is a side view of the main tooth, FIG. 5 is a perspective exploded view thereof, and FIG. 4 shows a cross section taken along line XX in FIG. As you can see in these figures,
The main teeth 15 are fixed bases 3 mounted on the outer peripheral surface of the drum 4.
1, a tooth portion 32 that covers the fixed base, and a coupling pin 33 that fixes the tooth portion to the fixed base.

Among these, as shown in FIGS. 4 to 6 and 7, the fixed base integrally includes a seat plate portion 34 which bends in an arc shape along the curvature of the drum 4 and a head portion 35 provided thereon. The head part 35 is provided with a stepped through hole 36 penetrating the side surface thereof. still,
The through hole 36 is set to be larger than the diameter of the coupling pin 33, and both ends of the through hole 36 receive a seat 36 for accommodating a ring described later.
The diameter is enlarged as A. The fixed base 31 as described above has the acute angle portion 3 formed at one end of the seat plate portion 34.
4A is fixed by brazing the outer peripheral surface of the drum 4 in the direction of rotation of the drum 4.

Further, in FIGS. 4 to 6 and 8, the tooth portion 3
The reference numeral 2 is also a cast component, and a cavity portion 37 that fits the outer shape of the head portion 35 is formed therein, and through holes 38 corresponding to the through holes 36 of the fixed base are formed on both side surfaces thereof. The through hole 38 has a diameter equal to that of the connecting pin 33 and is smaller than the through hole 36 of the fixed base. Then, the tooth portion 32 as described above is fitted to the outside of the head portion 35 while being seated on the seat plate portion 34, and then the through hole 3
The fixed base 31 is fixed by the connecting pin 33 passed through
Is integrated with.

As shown in FIGS. 6 and 9, the coupling pin 33
Is a metal round shaft having a length slightly larger than the width of the tooth portion 32, and a rubber sleeve 40 as shown in FIG. 10 is provided on the outer peripheral portion between a pair of groove portions 39 described later.
The sleeve 40 is a cylindrical member made of a rubber-like elastic material such as urethane rubber, and is interposed between the coupling pin 33 and the through hole 36 so as to fill the gap between the coupling pin 33 and the through hole 36, and the central portion thereof is shown in FIG. Annular ridge 4 protruding inward and outward
1 is formed.

On the other hand, in the central portion between the through hole 36 of the fixed base and the connecting pin 33, annular recesses 42 and 43 into which the raised portions 41 of the sleeve 40 are fitted are formed, and the outer periphery of both ends of the connecting pin 33 is formed. The above-mentioned annular groove portion 39 is formed in this. Then, as shown in FIG. 6, the ring 4 that faces the groove portions 39 on both sides of the sleeve 40 and the fixed base 31.
4 (snap ring) is fitted, and the ring 44 restricts the movement of the coupling pin 33 in the axial direction.

As shown in FIG. 11, the ring 44 is a snap ring having a split groove 45 formed in a part thereof and having a variable diameter, and its outer diameter is determined by the through hole 38 of the tooth portion. It is set to be large and smaller than the seat 36A of the through hole formed in the fixed base. Further, the inner diameter of the ring 44 is equal to the groove portion 39 of the coupling pin when there is no load, and the thickness thereof is set to be the same as the depth of the seat 36A or slightly thinner than that.

Therefore, the connecting pin 33 is firmly fixed to the fixed base 31 by the synergistic action of the ring 44 and the sleeve 40, and the tooth portions 32 can be firmly held at both ends thereof so as not to fall off. When the tooth portion 32 is attached to the fixed base 31, first, the sleeve 40 is inserted into the through hole 36, and then the rings 44 are housed on both sides of the through hole (the receiving seat 36A).
5 is covered with the tooth portion 32, and the connecting pin 33 is driven from one side of the through hole 38 using a hammer or the like. Further, when the tooth portion 32 is replaced, the tooth portion 32 that is worn or the like can be easily removed by applying a rod-shaped tool to one end surface of the coupling pin 33 and punching out the coupling pin 33. .

Although the present invention has been described above, the tooth for crusher is not limited to the above example, and for example, the ring 44 may be fitted on the outer periphery of the tooth portion 32 on the outer periphery of the coupling pin 33. . Further, it is preferable to provide the rubber sleeve 40 on the outer peripheral portion of the coupling pin 33 as in the above-mentioned example because the rattling of the tooth portion 32 can be prevented, but this may be eliminated.

[0021]

As is apparent from the above description, according to the present invention, the fixed base mounted on the outer peripheral surface of the drum is covered with the teeth, and the teeth are attached to the fixed base by the connecting pins. Therefore, when the tooth part is worn, it can be easily replaced, and annular grooves are formed on the outer circumferences of both ends of the coupling pin, and the corresponding rings are fitted in both of these groove parts with the fixed base sandwiched therebetween. Therefore, the connecting pin does not unexpectedly come off, so that the tooth portion can be prevented from falling off during the crushing process.

Further, since the rubber sleeve is provided on the outer peripheral portion of the connecting pin between the rings, the synergistic action of the sleeve and the ring can completely prevent the connecting pin from slipping off, and the sleeve allows the connecting pin and Since the rattling of the teeth is prevented, the noise during the crushing process is reduced and the shear stress acting on the connecting pin can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of a crusher.

FIG. 2 is a plan view of the crusher.

FIG. 3 is a side view showing a drum provided in the crusher.

FIG. 4 is a side view of a crusher tooth according to the present invention.

FIG. 5 is a perspective exploded view of the same tooth

6 is a sectional view taken along line XX in FIG.

FIG. 7 is a side view of the fixed base.

FIG. 8 is a side view of the tooth portion.

FIG. 9 is a side view of the connecting pin.

FIG. 10 is a sectional view of the sleeve.

FIG. 11 is a plan view of the ring.

[Explanation of symbols]

4 drums 15 Main teeth 31 fixed base 32 teeth 33 coupling pin 34 Seat plate 35 head 36 through holes 36A seat 38 through hole 39 Groove 40 sleeve 41 Raised part 42,43 recess 44 ring

Claims (2)

[Claims] 1. A fixed base mounted on an outer peripheral surface of a drum, a tooth portion covered with the fixed base, and a coupling pin for fixing the tooth portion to the fixed base. In a crusher tooth having through holes through which the connecting pins pass, the annular grooves are formed on the outer peripheries of both ends of the connecting pin, and the rings facing each other with the fixed base interposed therebetween. A tooth for a crusher, which is characterized by being fitted. 2. A fixed base mounted on an outer peripheral surface of a drum, a tooth portion covered by the fixed base, a connecting pin for fixing the tooth portion to the fixed base, and a peripheral portion of the connecting pin. Equipped with a rubber sleeve,
In a crusher tooth formed by penetrating through holes through which the connecting pin passes respectively in the fixed base and the tooth portion, annular grooves are formed on the outer circumferences of both ends of the connecting pin, and the sleeve is sandwiched in both the groove portions. , A pair of rings facing each other are fitted, both ends of the through hole formed in the fixed base have an enlarged diameter as a seat for accommodating the ring, and the sleeve forms an annular ridge protruding inward and outward. At the same time, a tooth for a crusher is characterized in that an annular recess into which the raised portion is fitted is formed in the through hole of the fixed base and the outer periphery of the coupling pin, respectively.