JPS6343253Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a front dozer device for expanding the range of use of tractors.

(b) Prior Art Conventionally, the technology of attaching a front dozer device to the front of a tractor has been known.

For example, Publication No. 52-13762, Publication No. 13762, Publication No. 13762,
-Like Publication No. 41877.

(c) Problems that the invention aims to solve In this invention, the front part of the tractor is designed to be able to easily perform soil removal and earth burying work similar to that of bulldozers, which are conventionally used as construction and civil engineering machines. It is equipped with a front dozer device.

The functions required of a front dozer device that is attached to the front of a tractor are that it must be easily removable when not in use, i.e. when a rotary tiller is attached and used for other work, and it must also be able to be used for sloughing soil with a blade. After that, it is necessary to move the tractor forward and turn it up and down in order to make the blade go over the soil and to mound the soil high, and it is necessary to tilt it left and right to change the extrusion angle of the blade. It is necessary to be able to adjust the blade, and when the agricultural tractor moves straight with the blade tilted, a pushing load is applied to the blade support, so it is necessary to be able to sufficiently withstand this pushing load.

The front dozer device of the present invention is configured to satisfy these functions, and in particular, the blade 12
When pushing conveyed materials such as earth and sand forward, if pressing force is applied to the vertical parallel links 6, 8 and the vertical movement cylinder 7, the vertical parallel links 6,
8 generates an upward rotational force, and this force is received only by the vertical movement cylinder. Therefore, with the blade 12 raised, the rear end of the blade support 15 and the front end of the stopper 14 are brought into contact with each other. , it is integrated with the front dozer hit 5 and the bumper 2, and a blade 12 is attached to the front end of the bumper 2, so that a pushing and conveying action can be performed.

(d) Means for solving the problem The purpose and configuration of the present invention are as described above. Next, the configuration for achieving the purpose will be explained.

A blade support 15 is provided at the front of a front dozer hit 5 attached to the front surface of the bumper 2 via vertical parallel links 6 and 8 and a vertical movement cylinder 7, and a blade 12 attached to the front surface of the blade support 15 is provided. In a configuration where the can be raised and lowered freely,
A stopper 14 is protruded from the front surface of the front dozer hit 5, and a blade support 15 can be brought into contact with the front end of the stopper 14.
is raised, and at a position where the rear surface of the blade support 15 contacts the stopper 14, the bumper 2, stopper 14, blade support 15, and blade 12 are moved.
It is configured to be arranged substantially in a straight line when viewed from the side.

(E) Embodiment The purpose and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is an overall side view of the front dozer device of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is an exploded plan view of each part, and Fig. 4 is a blade 12.
5 is an enlarged side view showing the rear end of the blade support 15 in contact with the stopper 14, FIG. 6 is a plan view of the link mechanism, and FIG. 8 is a plan view of the blade 12 tilted to the left and right, and FIG. 9 is a view of the turnbuckle device 11 with the left and right angle adjustment function.
FIG. 10 is an exploded perspective view of the pin-type adjustment device 10, and FIG. 11 is an exploded perspective view of the pin-type adjusting device 10. FIG.
It is a side view of the state in which it is attached.

A front axle bracket protrudes from an engine section disposed within a hood 1 of a tractor, and a bumper 2 is fixed to the tip of the front axle bracket. A work equipment mounting body 3 is fixedly protruded from the front surface of the bumper 2 with bolts and nuts.

The work equipment mounting body 3 overlaps a single mounting plate 3a fixed to the front of the bumper 2 and parallel plates 5a, 5a protruding rearward from the front dozer hit 5, and is penetrated by pins 4, 4. Fixed. It consists of two forward-protruding parallel plates 3b, 3b.

The front dozer hit 5 has two parallel plates 5a, 5a protruding from the rear of the board 5c, and two U-shaped bodies 5b, 5b protruding from the bottom to the front at both ends.
A U-shaped body 5d that supports the upper pivot pin 16 of the vertically movable cylinder 7 projects from above the center.

Furthermore, two stoppers 14 are provided on the front surface of the board 5c.
14 is fixedly installed and protrudes forward. To install and remove the agricultural tractor and front dozer device, please refer to 2.
This is done by inserting and pulling out the book pins 4, 4 from the sides.

A plurality of insertion holes 5f for the pin 4 are provided,
It is adjustable up and down.

Work equipment mounting body 3 fixed on the front of the bumper 2
is also used for installing other work equipment,
Also, it does not get in the way even if it is left on, so it is left as is.

Insert the two upper and lower pins 13 and 17 into the two left and right U-shaped bodies 5b, 5b protruding from the front lower part of the front dozer hit 5, respectively, and connect the upper link 6.
and supports the lower link 8.

The front ends of the upper link 6 and lower link 8 are pivotally connected by pivot pins 19 and 20 of the blade support 15 on the rear surface of the blade pivot 9, and the blade 12 is moved by the expansion and contraction of the vertical movement cylinder 7. up and down,
It is configured as a parallel link mechanism to move in parallel at a constant biting angle.

That is, the U-shaped bodies 5b, 5b and the blade support 15 are arranged vertically in parallel, and the upper link 6 and the lower link 8 are arranged in parallel in the front and back.

The vertical movement cylinder 7 has its upper end pivotally supported on a pivot pin 16 of a U-shaped body 5d fixed at the center of the upper part of the front dozer hit board 5c, and its lower end is supported by a U-shaped arm 8a of a lower link 8 shown in FIG. It is pivotally connected to a pivot pin 24 at the joint between the link plate 8b and the link plate 8b. The vertical movement cylinder 7 uses a double-acting hydraulic cylinder.

The upper link 6 is connected to the pipe material 2 as shown in FIG.
It is constructed by welding a book into a V-shape, and the lower link 8 includes a pin-type adjustment device 10 with a left and right angle adjustment mechanism,
In order to avoid the turnbuckle device 11 and configure a parallel link mechanism, the rear part is made up of a U-shaped arm 8a made of pipe material, and the front part is made up of a link plate 8b housed within the width of the blade support 15. , the U-shaped arm 8a and the link plate 8b are connected to form an integral lower link 8.

Turnbuckle device 1 for blade support 15
1. The support part of the pin-type adjustment device 10 is provided to protrude rearward from the blade pivot 9, and when the blade 12 removes soil, force is applied unevenly, causing the pin-type adjustment device 10 and the turnbuckle device 11 to In order to prevent destructive refractive power from being applied, the pivot point is placed as far back as possible by the pivot pin 23, so that no boost due to the lever principle is applied.

The protruding surface of the rear end of this blade support 15 is brought into contact with the tip of the stopper 14 for limiting rotation during upward rotation to prevent further rearward and upward rotation.

In this state of contact, bumper 2 and stopper 1
4. The support portion 15 is arranged in a straight line when viewed from the side.

The blade pivot 9 is reinforced and protrudes from the substrate in a triangular shape in plan view, and is configured to withstand the load during earth removal.

The blade 12 is aligned with the pin hole of the pivot pin 22 at the tip of the blade pivot body 9, and the pivot pin 22 is pivotally connected, and a pin type adjustment device 10 for left and right tilt support is provided on the left and right rear surfaces of the blade 12, The front end of the turnbuckle device 11 is pivotally connected by pivot pins 21b and 21a.

Pin type adjustment device 10, turnbuckle device 11
The rear end is pivoted to the rear end of the blade support 15 by pivot pins 23, 23.

As shown in FIGS. 8, 9, and 10,
One side of the left/right angle adjustment mechanism is the turnbuckle device 1.
1 and the other is configured with a pin-type adjustment device, and if only one is used, there is a risk of destruction due to the force applied from both as tensile force or refractive force due to the soil discharge pressure of the blade rotating around the pivot pin 22. Therefore, by providing a pair on the left and right, the load is halved. Each is configured to be strong against loads in the pushing direction.

Both the left and right pin-type adjustment devices may be used, but the pin holes of the left and right pin-type adjustment devices are often shifted slightly due to overlapping assembly errors, making it difficult to insert the fixing pin 10a, so one is a pin-type adjustment device. The other is a turnbuckle device 1.
It was set to 1. If you want to adjust the left and right angle, first remove the pin 10a from the pin type adjustment device 10, leave the pin adjustment device free, and adjust the rotation of the turnbuckle device 11 with the handle 11a. When the pin holes 10b and 10c of the adjusting device meet at the next position, the fixing pin 10a
All you have to do is insert the .

The turnbuckle device 11 in FIG. 9 is a male threaded rod 1.
1b, 11c, and a female screw cylinder 11d to which a handle 11a is fixed.

The pin type adjusting device shown in FIG. 10 is composed of a male pipe 10d and a female pipe 10e, with a pin hole 10c of the male pipe 10d and a pin hole 10b of the female pipe 10e.
Then, the fixing pin 10a is inserted.

In the above, we have described the disadvantages of having only the pin-type adjustment device 10, only the turnbuckle device 11, and only the turnbuckle device 11 for the left and right angle adjustment devices, but it is also inconvenient to use the left and right turnbuckle devices 11, 11. be. That is, if both of them are turnbuckle devices, adjustment can be made only by turning the handles 11a of the left and right turnbuckle devices at the same time, and two people are required.

In FIG. 11, a transport bucket 18 is supported by a blade pivot 9 to form a transport vehicle.

If the transport bucket 18 is fixed only with the pivot pin 22, it will rotate on a horizontal plane, so rotation stoppers 29, 29 are brought into contact with the base plate 9a of the blade pivot body 9 from the left and right to stop the rotation. . Reference numeral 28 denotes a fitting for attaching the transport bucket 18 to the blade pivot 9.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, the blade 12 can be raised to a certain distance from the ground surface, and it is possible to stack soil after removing and collecting soil, and with the blade 12 raised,
At the position where the blade support 15 and the stopper 14 are in contact, the bumper 2, the stopper 14, the blade support 15, and the blade 12 can be solidified directly in a side view, so when pushing a heavy object, the bumper can directly solidify the bumper 2, the stopper 14, the blade support 15, and the blade 12. The state is the same as the pushing state, and no bending force is applied to the bumper 2, the vertical parallel links 6, 8, or the vertical movement cylinder 7, and a strong pushing force can be obtained.

[Brief explanation of drawings]

Fig. 1 is an overall side view of the front dozer device of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is an exploded plan view of each part, and Fig. 4 is a blade 12.
5 is an enlarged side view showing the rear end of the blade support 15 in contact with the stopper 14, FIG. 6 is a plan view of the link mechanism, and FIG. 8 is a plan view of the blade 12 tilted left and right, FIG. 9 is an exploded perspective view of the turnbuckle device of the left and right angle adjustment function, and FIG. 10 is an exploded perspective view of the pin type adjustment device 10. 11 are side views of the front dozer device of the present invention in which a transport bucket 18 is attached in place of the blade. 2... Bumper, 5... Front dozer hit, 6... Upper link, 7... Vertical movement cylinder, 8... Lower link, 12... Blade, 14
... Stopper, 15 ... Blade support.

Claims (1)

[Scope of utility model registration request] A blade support 15 is provided at the front of a front dozer hit 5 attached to the front surface of the bumper 2 via vertical parallel links 6 and 8 and a vertical movement cylinder 7, and a blade 12 attached to the front surface of the blade support 15 is provided. In a configuration where the can be raised and lowered freely,
A stopper 14 is protruded from the front surface of the front dozer hit 5, and a blade support 15 can be brought into contact with the front end of the stopper 14.
is raised, and at a position where the rear surface of the blade support 15 contacts the stopper 14, the bumper 2, the stopper 14, the blade support 15, and the blade 12 are moved.
A front dozer device for an agricultural tractor, characterized in that it is configured to be arranged substantially in a straight line when viewed from the side.