JPH05301581A - Tractor axle frame structure - Google Patents

Abstract

PURPOSE:To improve the field of view in a driver's seat and downsize the bonnet by lowering the position of the bonnet front part. CONSTITUTION:A pair of right and left planar axle frames 1, 1 are extended forward of the respective sides of a front part of a vehicle body of a tractor (T), and the front axle is supported by the lower part of the extended axle frames 1, 1 about the longitudinal axis in a rotatable manner. In the constitution where a radiator 6 is arranged to the upper part, the axle frame 1 is divided into a tightening member 4 and an extending member 5 so that the extending member 5 may be positioned lower than the tightening member 4. And, the axle frame is divided into the tightening member 4 and the extending members, and connected stepwise facing forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an axle frame extending toward a front part of a body of a tractor.

[0002]

2. Description of the Related Art Conventionally, the structure of axle frames arranged in the front-rear direction on both sides of the body of a tractor has been publicly known. For example, it is like the technique described in Japanese Utility Model Publication No. 57-184008 and Japanese Utility Model Publication No. 2-54706. The conventional axle frame is the axle frame 31 shown in FIG. 4 or the axle frame 4 shown in FIG.
1 and an axle frame 51 shown in FIG. 6, it is composed of a pair of left and right plate-shaped members and is arranged on both sides of the front part of the body of the tractor. Then, as shown in FIG. 4, a steering gear box 32 is fixedly installed at a front portion of the axle frame 31, and an engine E is provided with a bolt 33 at a rear portion thereof.
···································· s the front axle case 34 is disposed below the axle frame 31. Further, as shown in FIG. 5, an engine E and a radiator 42 are fixed to the axle frame 41, and the engine E and the radiator 42 are covered with a bonnet 43. Further, as shown in FIG. 6, a bumper 52 is fixed to the front end portions of the axle frames 51 and 51, and side plates 53 and 53 are fixed to the side surface portions, and the front axle case is attached to the side plates 53 and 53. That is, a member for horizontally tilting is horizontally installed.

[0003]

However, with the structure of the prior art, for example, as shown in FIG. 5, a radiator 42 is provided by using a pair of left and right axle frames 41.
, The radiator 42 is long in the vertical direction, so that the upper portion of the radiator 42 is located higher than the engine E, the front portion of the hood 42 rises, and the field of view from the driver's seat is narrowed. The raised position of the bonnet 42 causes a problem that the entire bonnet 42 becomes unnecessarily large.
Therefore, it is an object of the present invention to construct an axle frame of a tractor that can reduce the position of the bonnet to widen the field of view from the driver's seat and reduce the size of the bonnet.

[0004]

As a means for solving the above problems, the present invention provides a pair of left and right plate-shaped axle frames that extend forward on both sides of the front part of the body of a tractor. In the structure in which the front axle is rotatably supported around the longitudinal center axis in the extended lower part of the axle frame and the radiator is arranged in the upper part, the axle frame serves as a fastening member with the front part of the body of the tractor. ,
The extension member is divided into an extension member extending toward the front, and the extension member is configured to be lower than the tightening member, and
The members of the axle frame, which are divided into at least two or more parts, are connected stepwise toward the front.

[0005]

Next, the operation will be described. Tractor T
Axle frames 1.1 arranged on both sides of the front part of the body of the vehicle are divided into tightening members 4.4 and extending members 5.5, and the extending members 5 are positioned lower than the tightening members 4. Due to
Since a vertical space can be secured from the bonnet 2 to the extension member 5, when the radiator 6 is attached to the extension member 5, the position of the radiator 6 is lowered, and the position of the bonnet 2 is lowered accordingly. Therefore, the bonnet 2 can be downsized.

Further, the axle frame 1 is divided into two or more parts such as the tightening member 4, the extending member 5a and the extending member 5b, and is arranged in a stepwise manner toward the front lower side,
Similarly to the above, the position of the radiator 6 is lowered, and the position of the bonnet 2 can be lowered accordingly.
The steering case portion 7 can be protected by b.

[0007]

The problems to be solved and the means for solving the problems of the present invention are as described above, and the embodiments shown in the accompanying drawings will be described below. FIG. 1 is a side view partial sectional view of a front part of a tractor equipped with an axle frame of the present invention, FIG. 2 is a front view partial sectional view of the same, and FIG. 3 is a side view showing another embodiment of the present invention. FIG.

Referring to FIGS. 1 and 2, the first embodiment of the present invention will be described. The axle frames 1.1 are arranged on both sides of the machine body in parallel with the traveling direction of the tractor T, and the fastening members 4 are provided.・ It is divided into 4 and extension member 5 ・ 5. The extension member 5 extends forward at a position lower than the tightening member 4, and the rear upper inner surface of the extension member 5 and the front lower outer surface of the tightening member 4 are fixed by welding or the like. Has been done. The tightening member 4 has a bolt 9 for the engine E.
・ Fixed at 9 ... A pulley 10 for driving the cooling fan 8 is provided in the lower front portion of the engine E, and an oil pan 11 is provided in the lower portion.

A bumper 12 is fixed to the front ends of the extending members 5 and 5, a steering gear box 15 is fixed to the inner side, and a radiator 6 is fixed to the upper part.
The radiator 6 is located in front of the engine E and is covered with the bonnet 2 together with the engine E.
The steering gear box 15 is linked to the steering through a universal joint shaft, a connecting rod, etc., and one end of an arm 19 is fixed to an output shaft 15a protruding from the lower portion of the steering gear box 15. The arm 19 is projected rearward, and a tie rod 20 is pivotally connected to the rear end in the left-right direction. A knuckle arm is pivotally connected to the other end of the tie rod 20, and the knuckle arm is rotated in conjunction with the steering rotation of the steering wheel so that the front wheels are rotated. ing.

A front holder 21 and a rear holder 22 are provided in parallel in the front-rear direction on the inner surface of the extension member 5 below the tightening member 4, and the front holder 21 and the rear holder 22 are bolts 23.
・ 23 ... is fixed by tightening both sides. The front axle case 3 is supported between the front holder 21 and the rear holder 22 via a pivot shaft so as to be tiltable to the left and right. A front wheel driving shaft 24 is inserted in the center rear portion of the front axle case 3, and front wheels are supported on both sides.

Next, referring to FIG. 3, another embodiment of the present invention will be described. The axle frame 1 is divided into a tightening member 4, an extending member 5a and an extending member 5b.
The extension member 5b is fixed to the lower part of the front end of the extension member 5a,
It extends downward in a stepwise manner at a position lower than the fastening member 4, and has a front lower outer surface of the fastening member 4, a rear upper inner surface of the extension member 5a, and a front lower portion of the extension member 5a. The outer surface and the upper inner surface of the rear portion of the extending member 5b are fixed by welding or the like. The tightening member 4 has a bolt 9 for the engine E.
・ Fixed at 9 ... In the present embodiment, the axle frame 1 includes the tightening member 4 and the extending member 5a.
The extension member 5b and the extension member 5b are divided into three parts, but it is not particularly limited as long as it is divided into two or more parts.

A bumper 12 is fixed to the front end of the extending member 5b, and a steering gear box 15 and an output shaft 15a of the steering gear box 15 are arranged inside. The output shaft 15a constitutes the steering case portion 7 together with the arm 19 and the like, and the steering case portion 7 is constituted so as to be protected by being surrounded by the extension member 5b.

A radiator 6 is fixedly mounted on the extension member 5a. The radiator 6 is located in front of the engine E, and together with the engine E, the hood 2 is attached.
It is covered with. Extending member 5 below the tightening member 4
On the inner surface of a, a front holder 21 and a rear holder 22 are provided in parallel in the front-rear direction, and the front holder 21 and the rear holder 22 are
Both sides are fastened and fixed by bolts 23.

[0014]

Since the present invention is constructed as described above,
The following effects are achieved. That is, the structure of claim 1 lowers the position of the radiator,
The front part of the bonnet could be lowered accordingly, and the front view from the driver's seat could be expanded, improving the safety of the tractor. Since the bonnet can be downsized, the tractor can be downsized. Further, according to the second aspect of the present invention, the steering case portion can be protected by being surrounded by the extending member, so that contact with obstacles and the like is eliminated and the cause of failure of the operating system is reduced. ..

[Brief description of drawings]

FIG. 1 is a side view partial sectional view of a front portion of a tractor equipped with an axle frame of the present invention.

FIG. 2 is a partial front sectional view of the same.

FIG. 3 is a partial cross-sectional side view showing another embodiment of the present invention.

FIG. 4 is a partial sectional view of a side view showing a first conventional example.

FIG. 5 is a side view showing a second conventional example.

FIG. 6 is a perspective view showing a third conventional example.

[Explanation of symbols]

 1 Axle frame 2 Bonnet 3 Front axle case 4 Tightening member 5 Extending member 6 Radiator 7 Steering case part T Tractor

Claims (2)

[Claims] 1. A pair of left and right plate-shaped axle frames are extended forward on both sides of a front portion of a vehicle body of a tractor, and a front axle is pivoted around an axial center in the front-rear direction on the extended lower portion of the axle frame. In a configuration in which the axle frame is freely supported and a radiator is disposed on the upper portion, the axle frame is divided into a fastening member for fastening the front part of the body of the tractor and an extending member extending forward, and the extending member is also provided. The structure of the axle frame of the tractor is characterized in that is lower than the tightening member. 2. The axle frame structure for a tractor according to claim 1, wherein members of the axle frame divided into at least two or more parts are connected in a stepwise manner toward the front.