JPS6231473Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention Industrial Application Field The present invention relates to a trencher for digging trenches.

BACKGROUND ART Conventionally, as shown in Japanese Utility Model Application No. 54-80606, in a trencher in which a bucket and an earth removal plate are attached to a chain so that the tip of the earth removal plate is inserted into the bucket, There is one in which a bar-shaped stone removing means is provided protrudingly in front of the bucket, and the tip of the removing means is brought close to the cutting edge of the bucket.

In this conventional trencher, excavation obstacles such as stones and tree roots existing in the soil are removed by the rod-shaped stone removal means.

Problems that the invention aims to solve However, this conventional means for removing stones, etc. is rod-shaped (elongated plate-like) and is set at the same height as the bucket (does not protrude from the bucket). There is a high risk that hard stones, etc. that have not been removed by the removal means may hit the bucket and damage the bucket.In addition, in soils with a lot of clay, soft rock, etc., the removal means cuts into the soil with a long, plate-like part. There is also the problem that the resistance of the soil will be added to the bucket as it only has the effect of increasing the amount of soil.

Further, since the above-mentioned removing means is a long and narrow projecting member from the earth removal plate, excellent strength cannot be expected.

Furthermore, since the stone removal means is protruded in an inclined manner close to the cutting edge of the bucket, even if this removal means is worn out, it can be turned upside down and reused. I can't.

An object of the present invention is to enhance the digging ability of teeth that protect the bucket in a trencher, to improve the strength of the teeth, and to enable reuse of the teeth.

Means for Solving the Constituent Problems of the Invention The present invention includes an endless link assembly 9 on the outer periphery of the daging frame 3 connected to the vehicle body 1.
This link assembly 9
In a trencher equipped with a large number of buckets 12 for excavation on the outer circumferential side of the trencher, a straight trench made of a material harder than the buckets 12 and extending from the front side 14a to the rear side 14b in the moving direction is installed between the buckets 12. Teeth 14 formed into a chevron shape with a ridgeline
A plurality of mounting boards 15, which are welded together at a height such that the tip thereof slightly protrudes from the bucket 12, are mounted on the mounting portion 13 on the link assembly side, and are arranged at symmetrical positions with respect to the ridge line in the moving direction of the teeth 14. By detachably attaching the tooth 14 with a set of bolts 16 and nuts 17, the front side part 14a and the rear side part 14b of the tooth 14 can be reversed.

Function The present invention assists the excavation of the bucket 12 by the strong digging action of the teeth 14, and when the wear of the front side 14a of the tooth 14 progresses, the bolt 16 and nut 17 are removed, and the front side 14a of the tooth 14 is removed. and the rear side part 14b, and attach this tooth 1.
Reuse 4.

Embodiment Next, an embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, a four-bar parallel link mechanism 2 is provided at the rear of a tractor body 1 serving as a vehicle body. In this four-bar linkage mechanism 2, 3 is a daging frame, 4 is a hydraulic cylinder for tilting this daging frame 3, and 5 is a hydraulic cylinder for raising and lowering.

In addition, a sprocket 7 is provided at the upper end of the daging frame 3, and a plurality of idlers 8 are provided at the lower end and the front and rear surfaces of the middle part, and an endless chain-shaped link assembly is connected to the outer periphery of the daging frame 3 via these. The link assembly 9 is mounted rotatably and the sprocket 7 at one end is rotated by a drive unit (not shown).
go around.

Also, on the outer circumferential side of this link assembly 9,
A large number of buckets 12 for excavation are provided at regular intervals together with the links 11 constituting the link assembly 9, and one bucket for every several buckets 12 is installed as shown in FIG. L welded to links 11 on both sides of link assembly 9
A mounting board 15 formed by welding teeth 14 to the mounting portion 13 having a letter-shaped cross section is mounted using four sets of bolts 16 and nuts 17 arranged symmetrically as shown in FIG.

The tooth 14 is formed into a chevron shape with a straight ridgeline extending from the front side part 14a to the rear side part 14b in the direction of movement, and is made of a steel material harder than the bucket 12, so that the tip of the tooth 14 is moved from the tip of the bucket 12 to the tip of the tooth 14 during installation. The height should be such that it slightly protrudes. 18 is a recessed portion.

Then, the link assembly 9 is rotated and the daging frame 3 is lowered,
By press-fitting the bucket 12 and teeth 14 that rotate together with the link assembly 9 into the ground and pulling them with the tractor body 1, a trench is excavated in the ground, and the excavated soil is moved to the side by the chute 21. Discharge toward the direction.

During excavation, the teeth 14, which are harder than the bucket 12 and have protruding tips, help the bucket 12 in excavating and reduce the load on the bucket 12, so even soils containing a mixture of gravel, gravel, soft rock, sand, etc. It is possible to excavate easily, and the degree of wear on the bucket 12 can be reduced.

Further, when the front side portion 14a of the tooth 14 has progressed to wear, remove the bolt 16 and nut 17, and
The front side part 14a and the rear side part 14b are reversed and attached.

Effects of the invention According to the present invention, the teeth made of a material harder than the bucket are installed at a height such that the tip slightly protrudes from the bucket, so that the load on the bucket can be reduced, and the tooth is made of a harder material than the bucket. gravel,
Soil containing gravel, soft rock, sand, etc. can be excavated efficiently and easily using the bucket, and the degree of wear of the bucket can be reduced, extending the life of the bucket. In other words, by providing the above-mentioned teeth, the bucket can be protected, the excavation work of the bucket can be made easier, and the wear of the bucket can be reduced as much as possible. Can be used as a jar.

Further, since the teeth are formed in a mountain shape with straight ridge lines in the direction of movement, they exhibit excellent strength against the resistance force in the direction of movement in the soil, and can powerfully excavate the soil.

Furthermore, a mounting board made by welding the teeth of the above shape together can be freely attached and detached to the attachment part on the link assembly side using multiple sets of bolts and nuts arranged at symmetrical positions with respect to the ridge line in the direction of movement of the teeth. By attaching the tooth to the mounting part, the tooth can be reversed, so even if the front part of the tooth becomes worn, the tooth can be removed from the mounting part and the front and rear parts of the tooth can be replaced. By reversing the tooth and reattaching it, the worn front part is retracted to the rear, and the unworn rear part is positioned on the front side for digging, allowing the same tooth to be used again. The lifespan of teeth can be doubled.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the trencher of the present invention, FIG. 2 is a sectional view of the tooth attachment portion thereof, and FIG. 3 is a plan view thereof. 1... Tractor body as a vehicle body, 3...
Dayging frame, 9...Link assembly, 12...Bucket, 13...Mounting part, 14
...Tooth, 14a...Front side part, 14b...Rear side part, 15...Mounting board, 16...Bolt, 17
...Natsuto.

Claims (1)

[Scope of utility model registration request] In a trencher, an endless link assembly is rotatably attached to the outer periphery of a dayging frame connected to the vehicle body, and a large number of buckets for excavation are provided on the outer periphery of this link assembly. In between, teeth made of a material harder than the bucket and formed into a chevron shape with a straight ridge line from the front side to the rear in the direction of movement are welded together at a height such that the tip slightly protrudes from the bucket. The mounting board is removably attached to the mounting part on the link assembly side using multiple sets of bolts and nuts arranged symmetrically with respect to the ridge line in the direction of movement of the teeth. A trencher characterized by being reversible with respect to the rear side.