JPH07241483A - Crushing tooth - Google Patents

Abstract

PURPOSE:To provide an inexpensive crushing tooth having an extremely high surface hardness and wear resistance, which is not brittle, having impact resistance, which is hardly cracked and with the wear and cracking after long use easily repaired at a low cost. CONSTITUTION:A mild-steel tooth forming member 3 is welded onto a crushing member 1, a hollow part is formed in the member 3, a reinforcing material 4 is packed in the hollow part, and a means 5 for improving hardness is applied on the surface of the member 3 to constitute the crushing tooth. An expensive material such as special cast steel used in the conventional crushing tooth is not needed, and the tooth is formed at an extremely low cost since it is easily worked. Further, the toughness and impact resistance of the tooth are improved and the tooth is hardly cracked due to the reinforcing material in the hollow part, and the wear resistance of the tooth is improved because of the improved hardness of the tooth forming member surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing tooth of a crushing device for crushing coarse lumps such as concrete lumps, asphalt lumps, rocks, casting lumps, light metal lumps, and plastic lumps into fine particles and powders. Is.

[0002]

2. Description of the Related Art Conventional concrete blocks, asphalt blocks,
The crushing teeth of a crushing device for crushing rocks and the like are made of a special cast steel such as a high-manganese cast steel having a very high hardness as its material, and are cast integrally with a relatively large crushing member that performs a crushing operation.

[0003]

However, in such conventional crushing teeth, special cast steel such as high manganese cast steel, which is the material thereof, is very expensive, and the crushing teeth are integrated on the crushing member for performing the crushing operation. Made by casting in molding. Therefore, if the crushing member and the teeth are integrally formed with the expensive special cast steel, the cost will be greatly increased. Especially when the crushing teeth and crushing members become relatively large, using only so-called "Muku" (solid) material results in poor workability and increased weight, and the large amount of the expensive special cast steel is used. Very expensive.

The special cast steel is very hard, but it is brittle and easily cracked. For wear and cracks due to long-term use, due to poor weldability of cast steel, it is not possible to build up and repair only the worn parts by overlay welding or fill the cracks by welding and join them together. Since it is very difficult, when the crushing teeth become severely worn or cracked, they are replaced together with the crushing member. Therefore, the repair cost will be enormous.

In view of the above, the present invention requires that the cost be low and that the surface has a very high hardness and is wear resistant.
It is an object of the present invention to provide a crushing tooth that has both toughness, impact resistance, and resistance to cracking, is easy to repair even with wear due to long-term use, and significantly reduces repair costs. is there.

[0006]

In order to solve the above-mentioned problems, the present invention provides a tooth forming member made of steel by welding on a crushing member that performs a crushing operation, and at this time, crushing inside the tooth forming member. A hollow portion is formed on the member side, the hollow portion is filled with a reinforcing material, and a means for improving hardness is provided on the front side of the tooth forming member.

[0007]

According to the crushing tooth of the present invention as described above, an expensive material such as the special cast steel used for the conventional crushing tooth is not required, and the crushing tooth can be manufactured at a very low cost because it is easy to process. Further, since the hollow portion formed inside the tooth forming member is filled with the reinforcing material, the toughness and impact resistance of the fractured tooth are improved in combination with the strength of the steel material of the tooth forming member to make it difficult to crack. be able to.

Further, since the surface of the tooth forming member is provided with a means for improving the hardness, it is possible to improve the wear resistance of the fractured teeth. Further, for wear due to long-term use of the crushing tooth, it is possible to build up and repair the wear part by hardening overlay welding, and since the crushing tooth can be used many times, It is easier to repair and can be done at a significantly lower cost than before.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing a cone type crushing device according to a first embodiment of a crushing tooth according to the present invention. FIG. 1 is a perspective view of a cone type crushing device, and FIG. 2 is an outer conical cylindrical body 1.
And a top view of the inner conical cylindrical body 2, FIG. 3 is a longitudinal sectional view of the cone type crushing device, and FIG. 4 is IV-I of the crushing tooth 1a in FIG.
FIG. 5 is a cross-sectional view taken along the arrow V, and FIG. 5 is a perspective view for explaining the operation of the cone-type crushing device.

1 to 3, reference numeral 1 denotes a mortar-shaped outer conical cylinder body having no bottom, and this outer conical cylinder body 1
Is arranged with the smaller diameter facing downward, and crushing teeth 1a having a triangular mountain-shaped cross section extending in the generatrix direction are formed on the inner peripheral surface thereof.

As shown in FIG. 4, the crushing tooth 1a is a long member 3 (tooth forming member) of mild steel (SS41 or the like) having a cross section bent at a right angle, such as L-shaped steel, on an outer conical cylinder 1. Are welded on both sides thereof. The hollow portion on the side of the outer conical cylinder 1 inside the tooth forming member 3 is filled with concrete 4 (reinforcing material) that has been kneaded in advance, and after the concrete 4 hardens, both ends of the tooth forming member 3 are crushed during the crushing operation. The filled concrete 4 is closed by welding using a plate material of mild steel so as not to be extruded from the inside. A buildup 5 is formed on the front side of the tooth forming member 3 by hardening buildup welding using martensite (wear resistant steel).

Inside the outer conical cylinder body 1, there is arranged an inner conical cylinder body 2 having crushing teeth 2a similar to the crushing teeth 1a of the outer conical cylinder body 1 formed on the outer peripheral surface thereof. Is larger than the smaller diameter of the outer conical cylinder 1. The inner conical cylindrical body 2 is arranged coaxially with the outer conical cylindrical body 1 with the larger diameter thereof facing downward, and the lower end of the inner conical cylindrical body 2 is located between the lower end of the outer conical cylindrical body 1. A gap C is formed in the space (see FIGS. 2 and 3).

At a part of the outer peripheral surface of the lower end portion of the outer conical cylindrical body 1 shown in FIG.
It is connected through 3. An end of the cylinder device 7 opposite to the piston rod 7a is swingably connected to a frame (not shown) in a horizontal plane.

The cylinder device 7 is driven by the hydraulic pump 9 to expand and contract the piston rod 7a, and the hydraulic pump 9 is driven by the engine 11 via the joint member 10.
The hydraulic pump 9 is connected to the oil tank 12 by a pipe, and the hydraulic pump 9 is driven by the driving operation of the hydraulic pump 9.
Is configured to discharge or suck working oil into the oil tank 12.

In such a crushing device, as shown in FIG. 5, the crushing teeth 1 of the outer conical cylindrical body 1 at the construction site.
The inner peripheral surface on which a is formed and the crushing tooth 2a of the inner conical cylindrical body 2
By inserting a coarse lump 14 such as concrete or asphalt between the outer peripheral surface where is formed, and by reciprocally rotating the outer conical cylindrical body 1 around the axis at a predetermined angle by the cylinder device 7, A coarse lump 14 such as concrete or asphalt is finely crushed, and the crushed fine particles or powder is a gap C formed between the lower end of the outer conical cylinder 1 and the lower end of the inner conical cylinder 2. It is allowed to fall and collected.

The crushing teeth 1a, 2a provided on the outer conical cylinder 1 and the inner conical cylinder 2 do not require an expensive material such as special cast steel such as high manganese cast steel used for the conventional crushing teeth. At the same time, it is easy to process and can be made at a very low cost. In addition, since the hollow portion formed inside the tooth forming member 3 is filled with the reinforcing material concrete 4, in combination with the strength of the mild steel of the material of the tooth forming member 3, the crushing teeth 1a,
It is possible to improve the toughness and impact resistance of 2a and make it difficult to crack.

Since the buildup 5 is applied to the front side of the tooth forming member 3 by hardening buildup welding as means for improving hardness, the wear resistance of the crushing teeth 1a, 2a can be improved.
Furthermore, for wear due to long-term use of the crushing teeth 1a and 2a, it is possible to build up and repair the wear portion by hardfacing welding, and the crushing teeth 1a and 2a can be used any number of times. Therefore, repair can be performed easily and at a significantly lower cost than before.

6 to 9 are views showing a jaw crusher according to a second embodiment of the fracturing tooth according to the present invention.
6 and 7, reference numerals 15 and 16 are rectangular plate-like crushing members, and crushing teeth 15a and 16a are formed on the surfaces of these crushing members 15 and 16 facing each other.

In such a jaw crusher as shown in FIG. 7, a coarse mass 14 such as concrete or asphalt is put between the crushing members 15 and 16, and the upper end of the crushing member 16 in the drawing is the lower end in the drawing. By reciprocally rotating in the direction of the arrow with the portion as a fulcrum, a coarse lump 14 such as concrete or asphalt can be finely crushed.

The crushing teeth 15a of the crushing members 15 and 16,
16a, as shown in FIG. 8 and FIG.
6, a long member 18 (tooth forming member) of mild steel having a cross section bent at a right angle, such as L-shaped steel, is provided by welding both side portions thereof by welding. Tooth forming member 1
Concrete 4 is filled in the hollow portion on the side of the crushing members 15 and 16 inside 8 and both ends of the tooth forming member 18 are the same as the tooth forming member 3 of the crushing teeth 1a and 2a after the concrete 4 hardens. It is closed by welding with a mild steel plate.
The overlay 5 is formed on the front side of the tooth forming member 18 by hardening overlay welding using martensite.

The crushing teeth 15a, 16a provided on the crushing members 15, 16 of such a jaw crusher require an expensive material such as special cast steel such as high manganese cast steel used for the conventional crushing teeth. Not only that, it is also easy to process, so it can be made at a very low cost. Further, since the hollow portion formed inside the tooth forming member 18 is filled with the reinforcing material concrete 4, in combination with the strength of the mild steel of the material of the tooth forming member 18, the toughness and resistance of the crushing teeth 15a, 16a are improved. It is possible to improve impact resistance and make it difficult to break.

Further, since the overlay 5 is applied to the front side of the tooth forming member 18 by hardening overlay welding as means for improving hardness,
The wear resistance of the crushing teeth 15a and 16a can be improved. Furthermore, for wear due to long-term use of the crushing teeth 15a, 16a, it is possible to build up and repair the wear part by hardfacing welding.
Since a can be used any number of times, it can be repaired more easily and at a significantly lower cost than before.

10 to 12 are views showing a roll type crusher according to a third embodiment of the crushing tooth according to the present invention.
In FIG. 10 and FIG. 11, reference numerals 19 and 20 are cylindrical roll-type crushing members, and the crushing teeth 19 are provided on their peripheral surfaces.
a and 20a are formed. As shown in FIG. 12, such roll-type crushing members 19 and 20 have a large mass 14 such as concrete or asphalt placed between the roll-type crushing members 19 and 20 so that the roll-type crushing members 19 and 20 are By rotating in the direction indicated by the arrow, these large lumps 14 can be pinched and pressed to be finely crushed.

By the way, as shown in FIG. 11, a long member 22 (tooth forming member) of mild steel having a cross section bent at a right angle, such as L-shaped steel, on the peripheral surface of the roll-type crushing member 20.
However, the both side portions are provided by welding by welding. Concrete 4 is filled in the hollow portion on the roll-type crushing member 20 side inside the tooth forming member 22.
After the tooth is hardened, both ends of the tooth forming member 22 are
Like the tooth forming members 3 of a and 2a, they are closed by welding. The overlay 5 is formed on the front side of the tooth forming member 22 by hardening overlay welding using martensite.

The crushing teeth 19a, 20a provided on the roll crushing members 19, 20 of such a roll crusher are
It does not require an expensive material such as a special cast steel such as a high manganese cast steel used for the conventional crushing tooth, and can be manufactured at a very low cost because it is easy to process. Further, since the hollow portion formed inside the tooth forming member 22 is filled with the concrete 4 of the reinforcing material, the crushing teeth 1a, 2a, 15
Similar to a and 16a, it is possible to improve the toughness and impact resistance of the crushing teeth 19a and 20a and make them difficult to crack.

As a means for improving the hardness on the front side of the tooth forming member 22, the overlay 5 is applied by hardening overlay welding,
The wear resistance of the crushing teeth 19a and 20a can be improved. Further, for wear due to long-term use of the crushing teeth 19a, 20a, it is possible to build up and repair the wear part by hardening overlay welding.
Since a can be used any number of times, it can be repaired more easily and at a significantly lower cost than before.

Although concrete is used as a reinforcing member for filling the hollow portion inside the tooth forming member in the above-mentioned embodiment, it is not limited to concrete, and other asphalt, synthetic resin, molten metal, or those You may use the mixture.

Further, although the cone type crushing device, the jaw crusher and the roll type crushing device have been described as the crushing device in the above-mentioned embodiment, the present invention can be applied to any other type of crushing device.

Further, in the third embodiment described above, the crushing teeth 19a, 20a are formed over the entire length of the roll type crushing members 19, 20. However, as in the fourth embodiment shown in FIG. The teeth 19a and 20a may be shorter than the length of the roll-type crushing members 19 and 20 at appropriate intervals, and in that case, the same cross-section as the crushing teeth 19a and 20a in the third embodiment is also provided. Can be used.

[0030]

As described above, according to the present invention, an expensive material such as the special cast steel used for the conventional crushing teeth is not required and the processing is simple, so that it can be manufactured at a very low cost. . Further, since the hollow portion formed inside the tooth forming member is filled with the reinforcing material, the toughness and impact resistance of the fractured tooth are improved in combination with the strength of the steel material of the tooth forming member to make it difficult to crack. be able to.

Further, since the means for improving the hardness is provided on the front side of the tooth forming member, the wear resistance of the crushed teeth can be improved. Further, for wear due to long-term use of the crushing tooth, it is possible to build up and repair the wear part by hardening overlay welding, and since the crushing tooth can be used many times, It is easier to repair and can be done at a significantly lower cost than before.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cone type crushing device according to a first embodiment of a crushing tooth according to the present invention.

FIG. 2 is an outer conical cylinder body 1 of the cone type crushing device shown in FIG.
3 is a top view of the inner conical tubular body 2. FIG.

FIG. 3 is an outer conical cylinder body 1 of the cone type crushing device shown in FIG.
3 is a vertical cross-sectional view of the inner conical tubular body 2. FIG.

4 is a cross-sectional view of the crushing tooth 1a in FIG. 3 taken along the line IV-IV.

5 is a perspective view explaining the operation of the cone-type crushing device shown in FIG. 1. FIG.

FIG. 6 is a top view of the crushing members 15 and 16 of the jaw crusher according to the second embodiment of the crushing tooth of the present invention.

7 is a side view of the crushing members 15 and 16 for explaining the operation of the jaw crusher shown in FIG.

FIG. 8 is a VIII-of the crushing members 15 and 16 in FIG.
FIG. VIII is a cross-sectional view taken along the arrow VIII.

9 is an enlarged cross-sectional view of the crushing tooth 15a of the circular part IX in FIG.

FIG. 10 is a top view of roll-type crushing members 19 and 20 of the roll-type crusher according to the third embodiment of the crushing tooth according to the present invention.

11 is an XI of the roll-type crushing member 20 in FIG.
FIG. 6 is a cross-sectional view taken along line XI-XI.

FIG. 12 is a front view of roll-type crushing members 19 and 20 showing the operation of the roll-type crusher.

FIG. 13 is a top view of roll type crushing members 19 and 20 of a roll type crusher according to a fourth embodiment of the crushing tooth according to the present invention.

[Explanation of symbols]

 1 Outer conical cylindrical body 2 Inner conical cylindrical body 1a, 2a Crushing tooth 3 Long member 4 Concrete 5 Overlay 7 Cylinder device 7a Piston rod 9 Hydraulic pump 10 Joint member 11 Engine 12 Oil tank 13 Joint device 14 Mass 15, 16 Crushing Member 15a, 16a Crushing tooth 18,22 Long member 19,20 Roll-type crushing member 19a, 20a Crushing tooth

Claims (1)

[Claims] 1. A tooth forming member made of steel is provided by welding on a crushing member that performs a crushing operation, and at this time, a hollow portion is formed inside the tooth forming member on the crushing member side, and a reinforcing material is provided in the hollow portion. And a means for improving hardness on the front side of the tooth forming member.