JPH09144071A - Excavation tooth and bucket equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replacement work of excavation teeth by forming monolithically the excavation teeth of excavation blades and a loading section, and loading the excavation teeth to cutting edges with bolts in a detachable manner. SOLUTION: Excavation teeth are monolithically formed of excavation blades 10 having specific width and a broad loading section 12 provided to the rear of the blades 10. When the excavation teeth 8 are respectively loaded to cutting edges 4 of a bucket 2, a channel 16 formed in the loading section 12 is fitted so as to cover the front ends of the cutting edges 4 and up and down parts of the front ends. Then, bolts 22 are fitted to mounting holes 18 of the loading section 12 formed so as to pass through the channel 16. Accordingly, the loading and detachable work of the excavation teeth to the bucket can be easily carried out without requiring welding work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavating tooth applied to a bucket of a construction machine such as a hydraulic excavator and a bucket equipped with the excavating tooth.

[0002]

2. Description of the Related Art A construction machine such as a hydraulic excavator includes an upper revolving structure which is rotatably supported on a lower traveling structure, and a working machine mounted on the upper revolving structure. The work machine includes a boom supported by the upper swing body, an arm supported by the tip of the boom, a bucket supported by the tip of the arm, and the like. The boom, arm, and bucket are vertically swung by hydraulic cylinders.

Among the above-mentioned buckets which are working parts, a general bucket applied to excavation work, loading work, etc. is provided with a cutting edge over substantially the entire width of its tip portion, and this cutting edge is substantially A plurality of excavating teeth having the same structure are mounted at intervals in the width direction of the bucket. Each of the drilling teeth includes a drilling blade member, an adapter that is a separate member, and a pin member that connects them.

[0004]

In each of the above-mentioned excavating teeth, the excavating blade member and the adapter have substantially the same width. Each of the adapters is fixed to the tip of the cutting edge of the bucket by welding at intervals in the width direction of the bucket, and the digging blade member is connected to the tip of each of the adapters via a pin member. That is, each of the excavating teeth is configured by connecting two separate members via a pin member, and is mounted in the above-described configuration at the tip of the cutting edge of the bucket with a space in the bucket width direction. To be done. Therefore, the conventional drilling tooth and the bucket equipped with the drilling tooth are
It has the following problems. (1) Since the adapter and the excavating blade member in each of the excavating teeth are connected by the pin member, noise is generated due to backlash and there is a problem in durability. Further, since the number of parts is large and the adapter must be welded and then the excavating blade member must be connected thereto by the pin member, the number of steps for mounting the adapter on the bucket increases, resulting in an increase in manufacturing cost. (2) When exchanging the excavating blade member in each of the excavating teeth, the pin member must be removed, and thus a special jig and tool for exchanging the excavating blade member is required, which requires a cost and the exchanging thereof. Work is relatively difficult. (3) Since the tip of the cutting edge of the bucket is exposed to the outside between each of the excavating teeth when each of the excavating teeth is mounted, it is necessary to use a wear-resistant material (for example, wear-resistant steel). Therefore, the cost is high. (4) On the other hand, since each adapter of the excavating tooth is also made of a wear-resistant material, cracks may occur in the welded portion with the cutting edge due to defective welding or the like, and there is a problem in durability.

The object of the present invention is to provide a new excavating tooth which can be manufactured at a relatively low cost, which can solve the problems of durability and noise and which can be replaced without using special jigs and tools. It is to provide a bucket equipped with a tooth for excavation.

[0006]

To achieve the above object, according to the present invention, an excavating blade having a predetermined width,
And a mounting portion formed integrally with the rear portion of the excavating blade portion and having a width wider than the width of the excavating blade portion, the mounting portion including a tip of a cutting edge provided at a tip portion of the bucket and There is provided a drilling tooth having a groove that can be fitted so as to cover the upper and lower portions following the tip, and a mounting hole for bolt fitting that is formed so as to penetrate the groove.

In the excavating tooth according to the present invention, since the excavating blade portion and the mounting portion are integrally formed, the generation of noise due to backlash unlike the conventional tooth connected by the pin member is eliminated, The durability is also improved. The number of parts as an excavating tooth is minimized, and since the cutting edge can be detachably attached to the cutting edge with a bolt, welding work is not necessary, and mounting and removal work on a bucket is significantly facilitated, resulting in manufacturing cost. Is significantly reduced. Since there is no need for welding, there is no risk of cracks occurring, and durability is improved in this respect as well. Further, since no special jig or tool is required for exchanging the excavating tooth, the exchanging workability is improved and the cost is reduced.

In order to achieve the above object, according to the present invention, further, a cutting edge provided at a tip portion,
A plurality of excavating teeth attached to the cutting edge, each of the excavating teeth having an excavating blade portion having a predetermined width and integrally formed at the rear portion of the excavating blade portion; And a mounting portion having a width wider than the width of the excavating blade portion, each mounting portion having a groove that can be fitted so as to cover the tip of the cutting edge and the upper and lower portions following the tip, Each of the excavating teeth is detachably attached to the tip of the cutting edge by a bolt in a state where adjacent side surfaces of the attaching portion are substantially in close contact with each other. A bucket equipped with a tooth is provided.

In the bucket according to the present invention, each of the excavating teeth is detachably attached to the tip of the cutting edge by a bolt with the adjacent side surfaces of the attaching portion being substantially in close contact with each other. . Since each of the mounting portions has a width wider than the width of the excavating blade portion and is fitted so as to cover the tip of the cutting edge and the upper and lower portions following the tip, the tip of the cutting edge is in the mounted state. The part is protected by being covered by each of the mounting parts without being exposed to the outside. As a result, the cutting edge does not need to be made of a wear resistant material, and a normal steel plate (steel plate made of carbon steel for general structure) can be used, so that the manufacturing cost can be reduced as compared with the conventional bucket. . In addition, in the bucket according to the present invention, since each of the new excavating teeth described above is mounted, it is needless to say that the above-mentioned action and effect peculiar to each of the excavating teeth are simultaneously achieved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2,
Embodiments of an excavating tooth configured according to the present invention and a bucket equipped with the excavating tooth will be described. With reference to FIGS. 1 and 2, 2 is a bucket and 4 is a cutting edge, which is fixed to the tip of the bucket 2 over substantially the entire width thereof. In this embodiment, the cutting edge 4 is formed of a steel plate having a rectangular plane. Reference numeral 6 denotes side plates arranged on both sides of the bucket 2. 8 is a drilling tooth,
Each has substantially the same configuration.

The excavating tooth 8 comprises an excavating blade portion 10 and a mounting portion 12 formed integrally with the rear portion of the excavating blade portion 10. As shown in FIG. 1, the excavating blade portion 10 extends with a predetermined width when viewed from a plane, and the mounting portion 1 following it extends.
2 has a width wider than the width of the excavating blade portion 10 (at least the width at the extreme end thereof). In this embodiment, the width of the mounting portion 12 is defined so as to have an equally wide dimension on both sides with respect to the width of the excavating blade portion 10. Shoulders 14 are formed between both side surfaces defining the width of the excavating blade portion 10 and both side surfaces defining the width of the mounting portion 12, respectively. The shoulder 14 is curved when viewed from above. The thickness of the excavating blade portion 10 is formed so as to decrease toward the front end, and the thickness of the mounting portion 12 is formed substantially constant except for a seat portion 20 of a bolt 22 which will be described later.

The mounting portion 12 is formed with grooves 16 which are open on both side surfaces and a rear surface thereof. The groove 16 has a shape that can be fitted so as to cover the tip of the cutting edge 4 and the upper and lower portions following the tip. Therefore, the bottom of the groove 16 extends linearly in the width direction of the mounting portion 12. The mounting portion 12 also has two mounting holes 18 for fitting bolts which are spaced apart from each other in the width direction. Each of the mounting holes 18 is formed so as to penetrate the groove 16 and opens on the upper surface and the lower surface of the mounting portion 12. A flat seat portion 20 is formed at a portion of the mounting portion 12 where each of the mounting holes 18 opens.

Each of the excavating teeth 8 configured as described above is detachable by a bolt 22 at the tip of the cutting edge 4 in a state where the adjacent side surfaces of the mounting portion 12 are substantially in close contact with each other. Be attached to. Reference numeral 23 is a tightening nut. A plurality of mounting holes 24 for mounting the excavating teeth 8 are formed in the cutting edge 4 in advance at intervals in the width direction of the bucket 2. Each of the mounting portions 12 is fitted so as to cover the tip of the cutting edge 4 and the upper and lower portions following the tip, and the adjacent side surfaces are mounted so as to be in close contact with each other. Therefore, the tip of the cutting edge 4 is almost completely covered by each of the mounting portions 12. It is preferable that the adjacent side surfaces of the mounting portion 12 are in close contact with each other as much as possible, but it is allowable as long as the clearance is such that soil or rock does not directly act as a load on the tip portion of the cutting edge 4.

Since the excavating tooth 8 is integrally formed with the excavating blade portion 10 and the mounting portion 12, the generation of noise due to backlash unlike the conventional tooth connected by a pin member is eliminated. , Durability is also improved. Drilling tooth 8
Since the number of parts as a minimum is one, and the cutting edge 4 can be detachably attached to the cutting edge 4 with no need for welding work, the bucket 2
The mounting and dismounting operations to and from the unit are significantly facilitated, and the manufacturing cost is greatly reduced. Because there is no need for welding,
The risk of cracks is eliminated, and durability is improved in this respect as well. Further, since no special jig or tool is required for exchanging the excavating tooth, the exchanging workability is improved and the cost is reduced.

In the bucket 2, each of the excavating teeth 8 is detachably attached to the tip of the cutting edge 4 by a bolt 22. Each of the mounting portions 12 is fitted so as to cover the tip of the cutting edge 4 and the upper and lower portions following the tip, and the side surfaces adjacent to each other are mounted in close contact with each other. The tip portion of the cutting edge 4 is almost completely covered by each of the mounting portions 12, and is protected without being exposed to the outside. Therefore, the tip of the cutting edge 4 does not come into direct contact with earth and sand, rocks, etc. even during bucket excavation work or loading work, so that the cutting edge 4 does not need to be made of a wear-resistant material, and a normal steel plate is used. Can be used. As a result, the manufacturing cost can be reduced as compared with the conventional bucket. It is needless to say that the new excavating tooth 8 described above is mounted on the bucket 2, so that the above-described operational effects specific to the excavating tooth 8 are simultaneously achieved.

Although the embodiments of the excavating tooth and the bucket equipped with the excavating tooth according to the present invention have been described above, the present invention is not limited to the above-described embodiments and deviates from the scope of the present invention. Various changes or modifications can be made without doing so. For example, in the illustrated embodiment, the width of the mounting portion 12 of the excavating tooth 8 is formed so as to be widened by an equal length in both directions of the width of the excavating blade portion 10, but is formed so as to be wide only on one side. May be done.
Further, the shape of the shoulder portion 14 may be formed so as to extend linearly from both side surfaces of the front end of the mounting portion 12 to the tip of the excavating blade portion 10. In short, in the state where each of the excavating teeth 8 is attached to the cutting edge 4, the front end portion of the cutting edge 4 is covered by the attaching portion 12, and the excavating blade portions 10 are arranged at intervals from each other. is important. As a result, the front end of the cutting edge 4 is protected by the mounting portion 12, and the excavating function of the excavating tooth 8 is ensured. Therefore, if both these functions are ensured, the excavating tooth 8 can be variously modified.
Further, the excavating tooth 8 is attached by two bolts, but theoretically one is also possible. However, in practice, it is preferable to use a plurality.

[0017]

EFFECTS OF THE INVENTION The excavating tooth and the bucket having the excavating tooth constructed according to the present invention can be manufactured at a relatively low cost, and problems such as durability and noise can be solved and a special cure can be achieved. The excavating tooth can be replaced without using a tool.

[Brief description of the drawings]

FIG. 1 is a top view of essential parts showing an embodiment of a bucket equipped with an excavating tooth constructed according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

[Explanation of symbols]

 2 Bucket 4 Cutting Edge 8 Excavation Tooth 10 Excavation Blade 12 Mounting Part 14 Shoulder 16 Grooves 18 and 24 Mounting Hole 22 Bolt

Claims (2)

[Claims] 1. An excavating blade portion having a predetermined width, and a mounting portion integrally formed at a rear portion of the excavating blade portion and having a width wider than the width of the excavating blade portion. The part has a groove that can be fitted so as to cover the tip of the cutting edge provided at the tip of the bucket and the upper and lower portions following the tip, and a mounting hole for bolt fitting formed so as to penetrate the groove. An excavation tooth characterized by the following. 2. A cutting edge provided at a tip end, and a plurality of excavating teeth attached to the cutting edge, each excavating tooth having an excavating blade portion having a predetermined width. A mounting portion formed integrally with a rear portion of the excavating blade portion and having a width wider than the width of the excavating blade portion, each of the mounting portions continuing to a tip of the cutting edge and the tip. Each of the excavating teeth has a groove that can be fitted so as to cover the upper and lower parts, and each of the excavating teeth has a bolt at the tip of the cutting edge with the adjacent side surfaces of the mounting portion being in close contact with each other. A bucket equipped with an excavating tooth, which is detachably mounted by means of.