JPS5917943Y2 - culvert excavation equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device that is attached to, for example, a tractor, and is towed with an excavation beam that forms an underdrain plunged into the soil, thereby forming an underdrain for draining and ventilating a field.

Conventionally, a technique has been developed in which a drilling beam with excavators is fixedly supported and a drilling rotor is disposed in front of the beam, but since a large traction force is required to move the fixed beam, It was difficult to increase the moving speed of the beam, making it difficult to improve work efficiency, and the soil in front of the beam was scooped up by the rotor and discharged behind the beam, increasing the speed of excavation work. On the other hand, there was a risk that compost straw, weeds, etc. on the surface of the field would wrap around the rotor, beams, etc., significantly increasing the driving load thereof.

The present invention addresses the above-mentioned problems, and includes an excavation beam that is provided with an excavator for forming a culvert at the lower end, and a cutting blade that is provided on the front side of the beam and cuts the soil from side to side. The beam is swingably provided in the front and back of the machine body, and a transmission case that pivotally supports the cutting blade is swingably provided to interlock and connect the case and the excavation beam. The rear part of the cutting blade on the garden side is always in close sliding contact with the beam to support them, and the beam is oscillated back and forth to reduce this traction resistance compared to the conventional fixed structure, thereby increasing the work speed. In addition to being able to increase the speed more easily than before, the traction resistance of the beam is further reduced by cutting the soil in front of the beam from side to side with the cutting blade, and the driving force of the cutting blade is reduced compared to the conventional excavation rotor structure. By making the beam small, the soil in front of the beam can be quickly incised,
Not only can excavation work efficiency be significantly improved compared to the conventional method, but the beam receiver can easily cut and remove the compost straw and weeds wrapped around them by the blade part and the rear side part of the cutting blade, and the straw and weeds can be easily cut and removed. It is an object of the present invention to provide an underdrain excavation device that can prevent an increase in the drive load of the beam and cutting blade due to attachment, and can improve work efficiency compared to the conventional one.

An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a schematic side view of the entire machine showing how it is used. In the figure, 1 is an agricultural tractor, 2 is its engine, 3 is a transmission case, 4 is a handle, 5 is a driver's seat, 6 is a front wheel, and 7 is a rear wheel. , 8 is the rear axle, 9 is the PTO axis, 10 is the hydraulic lifting device,
11 is a lift arm, and 12 is a three-point link mechanism consisting of a lower ring 13 and a top link 14.

Further, 15 is a culvert excavating machine, 16 is its main frame, 17 is a front frame which is erected at the front end of the main frame 16 and connects each of the links 13 and 14 18 and 19, and 20 is each of the frames 16 .21 is a drum-shaped tail wheel with a mud-shedding plate 23 attached to the rear end of the main frame 16 via a height-adjustable arm 22; 24 is a pivot point on the main frame 16; An excavation beam 25 is supported through a shaft 25 and is rocked back and forth; 26 is an excavation member formed at the lower end of the beam 24 and plunged into the subsoil layer 28 below the plow bed layer 27 of the field; 29 A bullet body is movably connected to the rear of the excavation 26 via a hook member 30 and forms a culvert 31 in the subsoil layer 28, and a bullet body 32 is provided in front of the beam 24 and connects the soil layer 33 of the field. The cutting blade 34 is connected to the main frame 16 via a pin 35 so that its height can be adjusted freely, and the peripheral rear part of the cutting blade 32 is placed very close to the front end surface of the beam 24 (approximately in sliding contact). A bearing arm 36 supports the cutting blade 32 so as to connect the transmission shaft 3 to the PTO shaft 9.
The gearbox is equipped with a human power shaft 38 connected to the input shaft 38 via a gear (not shown), and a vibration output shaft 39 and a crankshaft 40 are attached to the gearbox 36, and are connected to the input shaft 38 via a gear (not shown). .

As shown in FIGS. 2 and 3, the vibration output shaft 39 is connected to the excavation beam 24 through an eccentric member 41 formed on the vibration output shaft 39.
and converts the rotational force of the vibration output shaft 39 into vibration driving force by the vibration assisting spring material 42 and the eccentric member 41,
The excavation beam 24 is formed to swing back and forth.

Also, there is a sprocket on the eccentric shaft 43 of the crankshaft 40)
At the same time, a sprocket 46 is fixed to the support shaft 45 on which the cutting blade 32 is attached, and each sprocket is fixed.
Stretch the chain 47 between 44 and 46.

Next, the bearing member 4 is inserted into the loose fitting hole 48 of the bearing arm 34.
9 is movably fitted, and the middle of the support shaft 45 is pivotally supported by the bearing member 49, and the sprocket) 44.
A transmission case 50 containing a built-in chain 46 and a chain 47 is attached between each of the shafts 43 and 45, and the crank movement of the eccentric shaft 43 pushes and pulls the support shaft 45 through the transmission case 50 to move the cutting blade 32 back and forth. The cutting blade 32 is formed to rotate together with the supporting shaft 45 via the sprocket 46 and the chain 47 by the revolving rotation movement of the sprocket 44 of the eccentric shaft 43 at the same time as the swinging vibration.

Furthermore, the bearing of the sliding beam 24 with which the cutting blade 32 comes into close sliding contact has the same amount of oscillation vibration a of the blade portion 24a and the amount of oscillation vibration of the cutting blade 32, and the beam 24 and the cutting The period of the rocking vibration of the blade 32 is made to match, and the cutting blade 32
The support of the beam 24 is formed so that the beam 24 and the cutting blade 32 are oscillated back and forth and the cutting blade 32 is rotated while the peripheral rear part of the beam 24 is brought into substantially contact with the blade part 24a. be.

The rectangular shape of the cutting blade 32 is approximately the same as that of a disk cutter or a disc saw.

The present invention is constructed as described above, and the P of the agricultural tractor 1 is
The excavation beam 24 is oscillated back and forth through the TO shaft 9, and the cutting blade 32 is oscillated back and forth with the peripheral rear portion of the cutting blade 32 brought into close contact with the blade portion 24a of the beam 24. The cutting blade 32 is dynamically vibrated and the cutting blade 32 is rotationally driven.

Then, when the tractor 1 is moved forward and the underdrain excavation work 15 is towed, the soil layer 33 in the field is first incised with the cutting blade 32,
The middle part of the excavation beam 24 is inserted into this kerf, and the excavation 26 at the lower end of the beam 24 is oscillated back and forth and driven into the subsoil layer 28, and the excavation 26 and the bullet body 29 are used to penetrate the subsoil layer 28. It forms the underdrain 31, and if foreign substances such as straw and weeds from the field are caught in the cutting blade 32,
The peripheral rear part of the cutting blade 32 and the receiver of the excavation beam 24 are connected to the blade part 24.
The contaminants are cut and removed by a to prevent the contaminants from wrapping around the excavation beam 24 and increasing the traction resistance of the beam 24.

Therefore, when the cutting blade 32 is shaped like a disc saw, foreign substances such as straw are likely to be caught in the cutting blade 32, but foreign substances that are wrapped around the excavation beam 24 are cut and promptly removed as described above. the drilling beam 24 with a relatively small traction force.
It is a device that can rush forward, and can excavate a drainage and ventilation underdrain 31 in the field regardless of the situation of the field.

As shown in the embodiments described above, the present invention provides an apparatus comprising an excavation beam 24 provided with excavations 26 forming an underdrain 31 at the lower end, and a cutting blade 32 provided on the front side of the beam 24 for cutting the soil from side to side. The drilling beer 24 is swingably provided in the front and back of the machine body, and a transmission case 50 that pivotally supports the cutting blade 32 is swingably provided to interlock and connect the case 50 and the drilling beam 24. The support on the front edge supports the peripheral side portion of the cutting blade 32 by constantly bringing it into close sliding contact with the blade portion 24a.The beam 24 is oscillated back and forth to reduce this traction resistance compared to the conventional method. Compared to a fixed structure, the work speed can be increased more easily than before, and the traction resistance of the beam 24 can be further reduced by simply cutting the soil in front of the beam 24 from side to side with the cutting blade 32. By reducing the driving force of the cutting blade 32 compared to the conventional excavation rotor structure, the soil in front of the beam 24 can be quickly cut, and the excavation work efficiency can be significantly improved compared to the conventional excavation rotor structure. The receiver of the beam 24 can easily cut and remove the compost straw and weeds wrapped around the beam 24 and the cutting blade 32 by the blade part 24 a and the rear side of the cutting blade 32 . This has practical effects such as preventing an increase in the driving load and improving work efficiency compared to the conventional method.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic side view showing how it is used, FIG. 2 is an enlarged explanatory view of the main part, and FIG. be.

Claims (1)

[Scope of utility model registration request] In a device comprising an excavation beam 24 provided with an excavation member 26 at the lower end to form a culvert 31, and a cutting blade 32 provided on the front side of the beam 24 for cutting the soil from side to side, the excavation beam 24 can be freely swung back and forth. a transmission case 50 that pivotally supports the cutting blade 32 is swingably provided, and the case 50 and the excavation beam 24 are interlocked and connected;
The underdrain excavation device is characterized in that the support on the front edge of the excavation beam 24 supports the circumferential rear portion of the cutting blade 32 by constantly bringing the peripheral rear portion of the cutting blade 32 into close sliding contact with the blade portion 24a.