JP3694003B2 - Tracked tractor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame structure of a crawler tractor.
[0002]
[Prior art]
Conventionally, the fuselage frame and track frame of a crawler tractor have an engine, transmission, hydraulic equipment, etc. arranged inside the fuselage frame, and the track frame is integrally formed with the motor frame on both sides of the lower part of the fuselage frame. Was.
[0003]
[Problems to be solved by the invention]
However, if the track frame is configured to be long from the front end to the rear end as in the prior art, both the overall length and the total weight of the track frame are increased.
The present invention solves this problem.
[0004]
[Means for Solving the Problems]
The present invention uses the following means in order to solve the above problems.
In a tractor traveling on a crawler type traveling device 1, 1, a truck in which an engine E is disposed between the front frames 2, 2 on both sides and connected to the outside of the front frame 2, 2 via a front cross member 6. Frames 5 and 5 are arranged in the front-rear direction, motor frames 5b and 5b are extended in front of the track frames 5 and 5, and hydraulic motors 20 and 20 are fixed to the motor frames 5b and 5b. The rear portions of the track frames 5 and 5 are connected by a rear cross member 10 to form a chassis B. A mounting plate 24 is fixed to the rear end of the chassis B, and a work machine mounting device is attached to the mounting plate 24. A plate 7 is fixed, and a work machine mounting device is attached to the support plate 7 so that it can be attached and detached as a unit .
[0005]
Therefore, the front frame and the track frame are integrally formed, the strength is increased, and the structure is simplified.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments will be described with reference to the accompanying drawings.
FIG. 1 is an overall side view of a crawler tractor.
FIG. 2 is also a plan view,
FIG. 3 is a plan view showing the frame configuration of the crawler tractor of the present invention,
FIG. 4 is also a side view,
FIG. 5 is a side view of a plate that can be attached to another machine provided with a three-point link type device;
FIG. 6 is also a plan view,
FIG. 7 is also a rear view.
[0007]
As shown in FIGS. 1 and 2, the crawler tractor A uses crawler type traveling devices 1 and 1 as traveling means, and a hydraulic pump P is disposed at the rear part of the engine E disposed in the bonnet 21. Then, pressure oil is fed to the hydraulic motor through the hydraulic piping to drive the drive wheels 1a and 1a of the crawler type traveling devices 1 and 1.
A driving unit 29 is disposed at the front and rear central portion of the machine body. The driving unit 29 has a cabin structure, doors 29a and 29a are disposed on both sides, and a handle 22 projects from the rear of the bonnet 21 in the driving unit 29. The seat 23 is placed behind the seat.
[0008]
The crawler type traveling device 1 has a motor frame 5b extending at the front end of the track frame 5, a hydraulic motor 20 fixed to the motor frame 5b, and the hydraulic motor 20 via a speed reducer 21. A drive wheel 1a is supported on the output shaft, and a driven wheel 1e is supported on the rear end of the track frame 5 via a tension mechanism.
In the middle of the lower part of the track frame 5, the wheels 1 b, 1 b... Are swingably provided with the swing shafts 1 c, 1 c as fulcrums to constitute an equalizer so that the unevenness can be easily overcome, and above A tension roller 1f is rotatably provided, and a raceway belt 1d is wound around the driving wheel 1a, the driven wheel 1e, the rollers 1b, 1b,.
[0009]
Next, the frame structure of the crawler tractor according to the present invention will be described with reference to FIGS.
The middle part of the front frame 2 connects the motor frames 5b and 5b via the front connection reinforcing plates 3 and 3. The motor frames 5b and 5b constitute the front portions of the track frames 5 and 5, and hydraulic motors 20 and 20 are fixed to the front ends of the motor frames 5b and 5b. 21 is attached to drive the driving wheel 1a.
[0010]
The rear end portion of the front frame 2 is fixed to a front cross member 6 that connects the middle portions of the left and right track frames 5.
The front cross member 6 is disposed at a position slightly rearward from the center in the front-rear direction of the aircraft. A rear cross member 10 is fixed to the rear ends of the track frames 5 and 5 and are reinforced by rear reinforcing plates 11 and 11. These are the front frame 2, the front cross member 6, the track frame 5, and the rear cross member 10. Constitutes chassis B.
[0011]
Therefore, the rear of the front frame 2 is opened, and the hot air generated after cooling the engine E placed on the front frame 2 flows backward as indicated by the arrow N and exhausts from the space 16. become.
In this embodiment, the front cross member 6 is connected to the track frames 5 and 5 so that the longitudinal center position of the connecting reinforcing plates 3 and 3 coincides with the longitudinal center position of the front frame 2. However, this is because the front cross member 6, the front connection reinforcing plates 3, 3 and the track frames 5, 5 are integrally connected to each other to prevent the damage at the longitudinal center position of the front frame 2 where the bending stress is maximum. Prevents breakage and relieves bending stress.
[0012]
A mounting plate 24 that covers the rear of the machine is fixed to the chassis B, specifically, the rear end of the rear cross member 10, and a support plate 7 for mounting the work machine mounting device is fixed to the mounting plate 24. The working machine mounting device is attached to the support plate 7 so that it can be detached as a unit.
That is, as shown in FIGS. 5, 6 and 7, the work machine mounting apparatus includes a top link 13, lift arms 12 and 12, lift rods 12 a and 12 a, lower links 8 and 8, and the lower link. 8 and 8 is composed of check chains 9 and 9 for preventing lateral shaking, and a support plate 7 is fixed to the mounting plate 24 by fixing bolts 7a, 7a, etc. and is detachable.
[0013]
Two pairs of support stays 25, 25,... Protrude from the lower sides of the rear surface of the support plate 7, and pivot pins 25a, 25a,. The front portion 8a of the lower link 8 can be mounted with two types of work machines having different widths such as a standard type and a wide type.
Further, the support stays 14 and 14 are fixed to the left and right sides in the vertical direction, the base of the lift arm 12 is pivotally supported by the pivot shaft 14 a provided at the upper portion of the support stay 14, and the pivot provided at the lower portion of the support stay 14. The base of the hydraulic cylinder 15 is pivotally supported by the support shaft 14b.
[0014]
The upper end of the lift rod 26 is pivotally supported by the pivot shaft 12b provided at the tip of the lift arm 12, and the lower end of the lift rod 26 is pivotally supported by the middle portion of the lower link 8 through the pivot shaft 8b. The left and right inclinations of the lift rod 26 can be changed via a hydraulic cylinder 26a.
In addition, the tip of the piston rod 15a of the hydraulic cylinder 15 is pivotally connected to the middle portion of the lift arm 12 by a pivot shaft 12c, and the lower end 15b of the hydraulic cylinder 15 is coupled to the support plate via the pivot shaft 14b. 14 is pivoted to the bottom.
[0015]
A check chain 9 is interposed between the middle portion of the lower link 8 and both sides of the plate 7 to prevent the work implement mounting apparatus from swinging. The stay 27 protrudes rearward from the center upper portion of the support plate 7, and the stay 27, the front end of the top link 13 is pivotally supported.
A work machine is mounted on the rear end of the top link 13 and the rear end of the lower link 8, and the work machine can be raised and lowered by extending and retracting the hydraulic cylinder 15, and the right and left inclination can be changed by extending and retracting the hydraulic cylinder 26.
The attachment plate 24 can be attached to the front end of the front frame 2, and the support plate 7 can be attached to the attachment plate 24 so that a work machine can be attached to the front portion.
[0016]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
As in the present invention, in a tractor that travels on a crawler traveling device 1 or 1, an engine E is disposed between the front frames 2 and 2 on both sides, and a front cross member 6 is disposed outside the front frames 2 and 2. The track frames 5 and 5 connected to each other are arranged in the front-rear direction, the motor frames 5b and 5b are extended in front of the track frames 5 and 5, and the hydraulic motors 20 and 20 are fixed to the motor frames 5b and 5b. And the rear portions of the track frames 5 and 5 on both sides are connected by the rear cross member 10, so that the damage of the front frame 2 with the maximum bending stress is integrated with the front cross member 6 and the track frames 5 and 5. By connecting to, it was possible to prevent breakage and relieve bending stress.
Further , a mounting plate 24 is fixed to the rear end of the chassis B, a support plate 7 for fixing the work implement mounting device to the mounting plate 24 is fixed, and the work implement mounting device is attached to the support plate 7. As a unit, the mounting plate 24 can be attached to the front end of the front frame 2, and the support plate 7 is attached to the mounting plate 24 so that a work machine can be attached to the front portion. Is also possible.
[Brief description of the drawings]
FIG. 1 is an overall side view of a crawler tractor.
FIG. 2 is also a plan view.
FIG. 3 is a plan view showing a frame configuration of the crawler tractor according to the present invention.
FIG. 4 is a side view of the same.
FIG. 5 is a side view of a plate that can be attached to another machine in which a three-point link type device is disposed.
FIG. 6 is also a plan view.
FIG. 7 is also a rear view.
[Explanation of symbols]
A crawler tractor B chassis E engine P hydraulic pump 1 crawler type traveling device 2 front frame 3 connecting reinforcing plate 5 track frame 5b motor frame 6 front cross member 7 support plate 8 lower link 9 check chain 10 rear cross member 12 lift arm 13 top Link 15 Cylinder 20 Hydraulic motor

Claims (1)

In a tractor traveling on a crawler type traveling device 1, 1, a truck in which an engine E is arranged between the front frames 2, 2 on both sides and connected to the outside of the front frame 2, 2 via a front cross member 6. Frames 5 and 5 are arranged in the front-rear direction, motor frames 5b and 5b are extended to the front of the track frames 5 and 5, and hydraulic motors 20 and 20 are fixed to the motor frames 5b and 5b. The rear portions of the track frames 5 and 5 are connected by a rear cross member 10 to constitute a chassis B, and a mounting plate 24 is fixed to the rear end of the chassis B, and a work machine mounting device is attached to the mounting plate 24. A crawler tractor characterized in that a plate 7 is fixed and a work machine mounting device is attached to the support plate 7 so that it can be attached and detached as a unit .

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