JP4113346B2 - Installation method of front dozer in agricultural tractor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting method of a front dozer in an agricultural tractor. Specifically, when the front dozer is mounted in front of the agricultural tractor, the front dozer is mounted so that the load applied to the chassis side during the dozer operation can be reduced. together, even if there is wide or narrow difference in the vehicle width of the agricultural tractor mounted, wide in front dozer corresponding to the vehicle width, to a method of mounting a front dozer which can also be accurately mounted to the agricultural tractor with a narrow vehicle width Is.
[0002]
[Prior art]
Conventionally, without using an earthwork bulldozer, a front dozer is often attached to an agricultural tractor to perform dozer work such as soil excavation, snow removal, and leveling. However, the front dozer is attached to the agricultural tractor because the base end of the dozer arm that supports the blade to swing up and down and the tip end of the piston rod of the dozer cylinder are directly pivotally connected to the chassis. There was a problem that the load was concentrated on the chassis during work.
[0003]
In addition, the agricultural tractor has a wide and narrow difference in vehicle width. Therefore, when used as a bulldozer, a front dozer corresponding to the width of the vehicle has to be prepared.
[0004]
[Problems to be solved by the invention]
The present invention has been devised to solve the conventional problems in view of the actual situation as described above. The intent of the present invention is to install a front dozer in front of an agricultural tractor during dozer work. The front dozer can be installed so that the load applied to the chassis can be reduced, and even if there is a difference in the width of the agricultural tractor mounted, Another object of the present invention is to provide a method for attaching a front dozer that can be accurately attached to an agricultural tractor having a narrow vehicle width.
[0005]
[Means for Solving the Problems]
In order to solve the problem, the technical means adopted by the present invention is that the front dozer is mounted in front of the agricultural tractor, and the bracket is protruded from the upper and lower end edges of the chassis at the opposite portions of the left and right outer surfaces of the chassis. The lower end of the left and right brackets are connected and fixed integrally with a belt-like plate, and the base end of the dozer arm that supports the blade is at the lower end of the left and right brackets, and the tip of the piston rod of the dozer cylinder is fixed vertically. The base end of the cylinder tube is pivotally connected to the upper end of the left and right brackets, respectively, and the distal end of the dozer arm is pivotally connected. The width of the part or the width of the tip of the piston rod of the dozer cylinder is set to have a margin, and the base end of the dozer arm is bracketed. After positioning the distal end of the piston rod on the lower end side of the pivot piece on the upper end side, respectively, the proximal end face of the dozer arm and the end face of the piston rod facing the inner piece or outer piece of the pivot piece The base end portion of the dozer arm and the tip end portion of the piston rod are pivotally connected to the pivot piece of the bracket with a connecting pin, respectively, in a state where a spacer is interposed in the gap .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 3, reference numeral 1 denotes an agricultural tractor including a crawler type traveling device 1a. A front dozer 4 is attached to a chassis 2 of the agricultural tractor 1 via a bracket 3 to provide a function as a bulldozer. Has been.
[0010]
The front dozer 4 is a known one, and includes a blade 5, a pair of left and right dozer arms 6 and 6 that support the blade 5 so as to be swingable up and down by fixing the tip to the lower end of the rear portion of the blade 5, and the blade 5. And a dozer cylinder 7 that moves up and down.
[0011]
The bracket 3 is a flat surface in a state in which it protrudes from the upper and lower edges of the chassis 2 in the longitudinal direction of the central portion of the outer surface of the mounting piece 3a and the mounting piece 3a having the same height as the height of the chassis 2. A pivot piece 3b integrally formed in a U-shape and a bottom plate 3c covering the lower end open portion of the pivot piece 3b. The attachment piece 3a is attached to the left and right outer surfaces of the chassis 2 with a plurality of fasteners 8,8. It is fixed in an opposing manner through.
[0012]
Further, at the lower end portions of the left and right brackets 3 and 3, a belt-like plate 9 is connected and fixed to the lower surface of the bottom plates 3c and 3c via fasteners 10, 10,. And the belt-like plate 9 are firmly fixed to the outer surfaces of the chassis 2 and 2.
[0013]
The base end portions of the dozer arms 6 and 6 that support the blade 5 of the front dozer 4 so as to be swingable up and down are connected to the lower ends of the pivoting pieces 3b and 3b of the left and right brackets 3 and 3 via connecting pins 6a and 6a. The tip of the piston rod 7a of the dozer cylinder 7 is pivotally connected to the upper ends of the pivot pieces 3b and 3b of the left and right brackets 3 and 3 via connection pins 7b and 7b, and the cylinder tubes 7c and 7c. Is pivotally connected via connecting pins 6c and 6c of brackets 6b and 6b provided on the distal end side of the dozer arms 6 and 6, but the outer side of the inner pieces 3b 'of the pivoting pieces 3b and 3b. The opposing width of the piece 3b ″ is such that the width 6w of the base end portion of the dozer arms 6 and 6 or 6w or the width 7aw or 7aw of the piston rod 7a of the dozer cylinder 7 has a wide vehicle width w and a narrow vehicle width w ′. About half of the difference (w-w ') The width is set by adding the width w ″ of the minute.
[0014]
The opposing width of the pair of left and right dozer arms 6 and 6 is set to correspond to the agricultural tractor 1 having a wide vehicle width, and the plate 9 for connecting and fixing the lower end portions of the pair of left and right brackets 3 and 3 Attaching holes 9a, 9a,... To the brackets 3, 3 are formed corresponding to the width of the vehicle.
[0015]
The hydraulic piping to the dozer cylinder 7 for raising and lowering the blade 5 is not directly piped from the external hydraulic outlet 12 to the dozer cylinder 7 as shown in FIG. Connected to the fixed block 14, the hoses 15, 15 are branched to the right and left to connect the connecting pins 6 a, 6 a serving as the vertical swinging fulcrum of the dozer arms 6, 6 and the connecting pins 6 c, 6 c serving as the lifting fulcrum of the blade 5. It passes through the vicinity and is connected to the cylinder tubes 7c and 7c. The lengths of the hoses 15 and 15 branched to the left and right are the same, and are covered with guides 16 fixed along the dozer arms 6 and 6, respectively. Therefore, the hose 15 and 15 branched to the left and right are not only less changed in length and deflection due to changes in the working posture such as the vertical swing of the blade 5, but also are less likely to be scratched because there is no play. Protected from obstacles.
[0016]
In the above configuration, in order to attach the front dozer 4 corresponding to the agricultural tractor 1 having a wide vehicle width w to the agricultural tractor 1 having a narrow vehicle width w ′, first, the mounting pieces 3a and 3a are attached to the chassis 2 and 2. The brackets 3 and 3 are fixed to each other, and the attachment light 9a, 9a... Of the belt-like plate 9 is selected, and the belt-like plate 9 is attached to the lower surfaces of the bottom plates 3c and 3c of the pivoting pieces 3b and 3b of the brackets 3 and 3. It abuts and the lower ends of the brackets 3 and 3 are connected and fixed via the fasteners 10, 10.
[0017]
Next, after positioning the base end portions of the dozer arms 6 and 6 on the lower end side of the pivoting pieces 3b and 3b of the brackets 3 and 3 and the tip end portions of the piston rods 7a and 7a on the upper end side, respectively, After interposing spacers 11 and 11 in the gaps between the proximal end surface of the dozer arms 6 and 6 facing the inner pieces 3b ′ and 3b ′ of 3b and the distal end surface of the piston rods 7a and 7a, the connecting pin 6a, 7b may be pivotally connected (see FIG. 4).
[0018]
Further, in order to mount the front dozer 4 on the agricultural tractor 1 having a wide vehicle width , the base end portion of the dozer arms 6 and 6 is connected to the lower end side of the pivoting pieces 3b and 3b of the brackets 3 and 3 in the same manner as described above. After positioning the distal end portions of the rods 7a and 7a on the upper end side, the proximal end portion end surfaces of the dozer arms 6 and 6 facing the outer pieces 3b '' and 3b '' of the pivoting pieces 3b and 3b, and the piston rod 7a, What is necessary is just to pivotally connect with the connection pins 6a and 7b , after interposing the spacers 11 and 11 in the clearance with the end surface of the front-end | tip part of 7a, respectively (refer FIG. 5).
[0019]
【The invention's effect】
As is apparent from the above description, according to the present invention, when the front dozer is mounted in front of the agricultural tractor, the bracket is protruded from the upper and lower end edges of the chassis at the opposite portions of the left and right outer surfaces of the chassis. The lower end of the left and right brackets are connected and fixed integrally with a belt-like plate, and the base end of the dozer arm that supports the blade is at the lower end of the left and right brackets, and the tip of the piston rod of the dozer cylinder is fixed vertically. Since the base end portion of the cylinder tube is pivotally connected to the top end side of the left and right brackets, respectively, the load applied to the chassis side during the dozer operation can be reduced.
In addition, the pivotal connecting part of the left and right brackets is set to have a width wider than the width of the base end of the dozer arm or the tip of the piston rod, and the opposing width of the dozer arm is set to correspond to a wide agricultural tractor. Therefore, even if there is a wide or narrow difference in the width of the agricultural tractor equipped, the front dozer corresponding to the wide width of the vehicle can be accurately attached to the agricultural tractor with a narrow width. There is no need to prepare a front dozer or bracket for each different.
It has a very useful novel effect.
[Brief description of the drawings]
FIG. 1 is an overall side view showing a state where a front dozer is mounted on an agricultural tractor.
FIG. 2 is a side view of an essential part.
FIG. 3 is a plan view of a main part.
FIG. 4 is a plan view of an essential part showing a state where a front dozer corresponding to a wide vehicle width is mounted on an agricultural tractor having a narrow vehicle width.
FIG. 5 is a plan view of an essential part showing a state where a front dozer corresponding to a wide vehicle width is mounted on an agricultural tractor having a wide vehicle width.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Agricultural tractor 2 Chassis 3 Bracket 3b Pivoting piece 4 Front dozer 5 Blade 6 Dozer arm 7 Dozer cylinder 7a Piston rod 7c Cylinder tube 9 Strip plate

Claims (1)

In order to mount the front dozer (4) in front of the agricultural tractor (1), the bracket (3) is extended vertically in a state of projecting from the upper and lower edges of the chassis on the opposite sides of the left and right outer surfaces of the chassis (2). The lower ends of the left and right brackets (3) and (3) are integrally connected and fixed by the belt-like plate (9), and the base end of the dozer arm (6) supporting the blade (5) is fixed to the left and right brackets. At the lower end, the tip of the piston rod (7a) of the dozer cylinder (7) is pivotally connected to the upper end of the left and right brackets, and the base end of the cylinder tube (7c) is pivotally connected to the tip of the dozer arm (6). Further, the pivoting piece (3b) of the left and right brackets (3) and (3) has an opposing width between the inner piece (3b ′) and the outer piece (3b ″), and the width (6w) of the base end portion of the dozer arm. Or dozer cylinder pin The width of the tip end of the ton rod is set to be wider than the width (7 aw) of the ton rod, the base end of the dozer arm (6) is placed on the lower end side of the pivot piece (3b) of the bracket, and the tip of the piston rod (7a) Of the dozer arm (6) facing the inner piece (3b ') or outer piece (3b'') of the pivot piece (3b) and the piston rod (7a). With the spacers (11) and (11) interposed in the gap with the end surface of the tip, the connecting pins (6a) and (7b) are the base end of the dozer arm (6) and the tip of the piston rod (7a), respectively. The mounting method of the front dozer in the agricultural tractor characterized by connecting a part to the pivoting piece (3b) of a bracket.

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