JPS644565Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a vehicle height adjustment device for an agricultural tractor.

(b) Prior Art The technology for adjusting the vehicle height of a tractor has been known to the public. For example, Utsukai 56-
This is similar to the technology described in Publication No. 77412.

(c) Problems that the invention aims to solve Tractors are not necessarily used for working on flat fields, but may also be used for plowing on slopes or on uneven land.

For this reason, it is desirable that the front and rear wheels of the tractor be able to be independently adjusted up and down to balance the vehicle body, and to raise the vehicle height to prevent unevenness from scraping the bottom of the vehicle body.

This invention allows the wheels to be moved up and down to adjust the vehicle height even while the tractor is running by tilting the part of the rotating case that adjusts the vehicle height with a clearance angle to the rear. Even in the event of a protrusion, it prevents the impact from occurring in the direction of sudden stopping the aircraft, and horizontal detection sensors S are installed at the front and rear of the aircraft.
1 and S2 are provided, and the horizontal sensing sensors S1 and S2 are provided.
The control box is operated in response to signals from 2 to extend and retract the hydraulic cylinders installed on each of the four wheels, thereby maintaining the aircraft horizontally at all times.

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

A rearwardly inclined front rotating case 17 is interposed between the front axle case 9 and the front wheel 11, and a rearwardly inclined rear rotating case 18 is also interposed between the rear axle case 12 and the rear wheel 14. The front rotating case 17 is rotatable around the front axle case 9, and the rear rotating case 18 is rotatable around the rear axle case 12 by individual hydraulic cylinders 19 to adjust the vehicle height. , horizontal sensing sensor S1 installed at the front and rear of the aircraft.
S2 and control box 22 are configured to automatically extend and retract each hydraulic cylinder.

(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 tractor, Fig. 2 is an overall plan view of the tractor, Fig. 3 is a plan view showing the position of the vehicle height vertical adjustment device, and Fig. 4 is a side view of the vehicle height vertical adjustment device. FIG. 5 is a front sectional view of the vehicle height adjustment device.

The tractor has an engine 2 mounted in a bonnet 1 as shown in FIGS. 1 and 2.
Power is transmitted to the clutch housing 3 at the rear, the transmission case 5 and the rear axle case 6 at the rear. Rear axle cases 12, 12 forming rear axle housings protrude from the left and right side surfaces of the rear axle case 6, and the left and right rear wheels 14, 14 are connected to the rear axle cases 12, 12 via the rear rotation case 18 at the ends of the rear axle cases 12, 12. The rear axle cases 12, 12 have axles 10, 10 inside which transmit power.

Further, a working machine such as a rotary tiller is attached to the rear surface of the rear axle case 6, and the work such as tilling is performed by moving forward.

The present invention includes left and right front wheels 11, 11, rear wheels 14,
14 can be adjusted up and down to maintain the horizontal balance of the vehicle body and adjust the vehicle height.

This vehicle height adjustment is performed by using oval front rotating cases 17, 17 between the left and right front wheels 11, 11 and the front axle cases 9, 9, and between the left and right rear wheels 14, 14 and the rear axle cases 12, 12, respectively. Rear rotation case 18,
18.

Among these, the front oblong front rotating case 17
The side surface of the end is pivotally connected to the front axle case 9, and the front wheel 11 is supported on the side surface of the other end of the front rotating case 17.

In addition, the end side surface of the rear oval rear rotation case 18 is pivotally connected to the rear axle case 12, and the rotation case 1
Left and right rear wheels 14 are supported on the other side surfaces of the wheels 8.

By rotating the axle cases 9, 12 around one end of the rotating cases 17, 18, the positions of the front and rear wheels 11, 14 on the other end sides of the rotating cases 17, 18 can also be adjusted. It will rotate. Therefore, the front and rear wheels 11, 14 can be adjusted up and down.

The rotation of the front and rear rotation cases 17, 18 is accomplished by the expansion and contraction of cylinders 19 individually arranged at the positions of the four wheels, as shown in FIG.
Each cylinder 19 is mounted between a cylinder mounting portion 20 provided on the top or side surface of the rotating cases 17, 18 and a cylinder support portion 21 provided on the tractor body.

The expansion and contraction of each cylinder 19 is controlled by a control box 22 located near the driver's seat 16.
and horizontal sensing sensor S1 located at the front and rear of the aircraft,
This is automatically performed in S2.

Next, the structure and movement of each of these rotating cases 17 and 18 will be explained.

First, the rear rotation cases 18 provided at the left and right rear portions are made of two oval steel plates stacked one on top of the other and fastened together with bolts 23, as shown in FIGS. 4 and 5. A cylindrical axle case receiver 30 protrudes from one end side surface of the rotating case 18, and the axle case receiver 3
0 is pivotally attached to the outer periphery of the rear axle case 12 in a rotatable manner.

Grease grooves 25 are formed on the inner peripheral surface of the axle case receiver 30 to allow smooth rotation.
is provided. And rear axle case 6
The axle 10 passes from the inside through the rear axle case 12 to one end of the rear pivot case 18.

an axle 10 passing through the rear rotation case 18;
Sprockets 26, 26 are attached to the ends of the sprockets 10. A sprocket 28 is pivotally mounted within the other ends of the rotating cases 18, 18 via a shaft 27. The rear wheel 14 is attached to one end of a shaft 27 protruding from the outer surface of the rear rotating case 18.

A chain 29 is placed between the sprocket 26 and the sprocket 28.

A cylinder 19 is pivotally connected to a cylinder pivot portion 20 on the upper end or side surface of the rear rotating case 18, and a support portion 21 for pivotally supporting the other end of the cylinder 19 is provided on the tractor body. Therefore, due to the expansion and contraction of the cylinder 19, the rear rotation case 1
By rotating 8, the height of the rear wheel 14 can be adjusted, and the engine 2 can be attached to the rear wheel 14.
can transmit rotational power.

35 is a reinforcing plate provided to prevent excessive force from being applied to the rear rotating case 18 and the axle case receiver 30 due to the tractor's own weight, and one end is attached to the left and right sides of the rear axle case 12 or the rear axle case 6. It is fixed to the side surface, and the other end is placed against the upper surface of the rear rotating case 18.

Next, the front rotation case 1 provided on the left and right front parts
7 will be explained.

The front rotating case 17 is similar to the rear rotating case 18 shown in FIGS. 4 and 5.
Two oblong steel plates are stacked and fastened together with bolts 23. A cylindrical axle case receiver 24 protrudes from an integral side surface of the front rotating case 17, and the axle case receivers 24, 24 are rotatably pivotally connected to the outer periphery of the front axle case 9. be.

Grease grooves 25 are formed on the inner peripheral surface of the axle case receiver 24 to allow smooth rotation.
is provided. Unlike the rear rotating case 18, this front rotating case 17 does not need to transmit power to the front wheels 11, so it is not provided with a sprocket or the like inside and only pivots the front wheels 11.

Similarly to the rear rotating case 18, a hydraulic cylinder 19 is pivotally connected to a cylinder pivoting part 20 on the upper end or side of the front rotating case 17, and a support part that pivotally supports the other end of the hydraulic cylinder 19. 21 is provided on the tractor body. Therefore, the vehicle height of the front wheels 11 can be adjusted by rotating the front rotating case 17 by expanding and contracting the hydraulic cylinder 19.

The expansion and contraction of each of these hydraulic cylinders 19 is performed by an adjustment lever provided near the driver's seat 16, as well as by horizontal sensing sensors S1 and S2 and a control box 22 provided at the front and rear positions of the tractor body. The system automatically detects the horizontality of the tractor body in the front, rear, left, and right directions and performs control.

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

First, hydraulic cylinders 19 are attached to each of the front wheels 11, 11 and the rear wheels 14, 14, and the vehicle height can be adjusted by extending and retracting these independently, so that a rapid response can be made even if the horizontal balance of the vehicle is lost due to unevenness in the ground.

Second, the horizontal sensors S1 and S2 installed at the front and rear of the tractor body detect the collapse of the horizontal balance of the tractor body, and the hydraulic cylinder 19 is automatically expanded and contracted via the control box 22 to level the machine body. This allows the driver to ride the aircraft in a horizontal position at all times, allowing for safe work.

Thirdly, since the front and rear four wheels are supported by the front rotating case 17 and the rear rotating case 18 that are tilted rearward, the vehicle height can be adjusted when driving forward, and the rotating case moves downward. Even if it protrudes to
Since there is no collision in the direction of digging into a recess in the ground, there is no impact in the direction of stopping the aircraft suddenly, making it possible to provide a safe vehicle height adjustment device.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the tractor, Fig. 2 is an overall plan view of the tractor, Fig. 3 is a plan view showing the position of the vehicle height vertical adjustment device, and Fig. 4 is a side view of the vehicle height vertical adjustment device. FIG. 5 is a front sectional view of the vehicle height adjustment device. 9...Front axle case, 11...Front wheel, 12...
... Rear axle case, 14 ... Rear wheel, 17 ... Front rotation case, 18 ... Rear rotation case.

Claims (1)

[Scope of utility model registration request] A rearwardly inclined front rotating case 17 is interposed between the front axle case 9 and the front wheel 11, and a rearwardly inclined rear rotating case 18 is also interposed between the rear axle case 12 and the rear wheel 14. The front rotating case 17 is rotatable around the front axle case 9, and the rear rotating case 18 is rotatable around the rear axle case 12 by individual hydraulic cylinders 19 to adjust the vehicle height. , horizontal sensing sensor S1 installed at the front and rear of the aircraft,
A vehicle height adjustment device for a tractor, characterized in that an S2 and a control box 22 are used to automatically expand and contract individual hydraulic cylinders.