JPH0755665B2 - Semi-crawler type riding work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-crawler type riding work machine in which a crawler belt is hung on a rear wheel and a rolling wheel behind the rear wheel.

[0002]

2. Description of the Related Art In a rear-wheel-drive riding work machine such as an agricultural tractor, a rear wheel is provided with a roller separated therefrom, and a crawler belt is hung on the rear wheel and the rear wheel. It is known from the specification of 2,722,280.

[0003]

However, since the structure in which the rolling wheels are vertically movable is supported at the rear portion of the machine body, the driving wheels of the rear wheels may lift the rolling wheels via the crawler belt. There was a problem that the running performance deteriorates when running on soft land such as farmland and snowy roads.

Therefore, an object of the present invention is to increase the distance between the front wheels and the crawler belt and prevent the rolling wheels from rising when traveling on soft ground such as farmland and snowy roads.
(EN) Provided is a semi-crawler type riding work machine capable of reliably grounding a front wheel and a crawler belt formed by a rear wheel and a rolling wheel even when the wheel diameter changes, etc., to improve running performance and stability on a slope. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a rear portion of a tractor machine body which extends in the vehicle width direction.
Attach the member so that the position can be adjusted only in the machine traveling direction.
If there are multiple axle support members on both ends of this cross member,
These axle supports are adjustably mounted to different swing angles
Attach the wheel axles to the material, and
A crawler belt between the rear wheel and the rear wheel placed in front of the wheel
A semi-crawler type riding characterized by being
It is a working machine.

[0006]

[ Operation ] When adjusting the mounting height of the roller,
The crawler belt to adjust the
Adjust the swing angle, adjust the cross member again, and adjust the crawler.
Tension the belt with moderate tension. Replace the crawler belt
When the crawler belt is stretched, the cross member
Adjust the crawler belt tension by adjusting. Trac
The cross member attached to the rear of the machine
The position can be adjusted only in the direction
Axle support member attached can be adjusted to multiple stages of swing angle
Because it is capable of running on soft land such as farmland and snowy roads,
Rolling wheels are prevented from rising, and it is possible to
Rear wheels are prevented from lifting when climbing, improving running performance
It

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 showing an example of a semi-crawler type riding work machine to which the present invention is applied, 1 is a tractor body, 1
Reference numeral 1 is a front wheel, 13 is a rear wheel, 15 is a rolling wheel, and 17 is a crawler belt. The tractor body 1 has an engine 3 mounted on the front portion of the body frame 2, a mission case 4 installed on the rear portion of the body frame 2, a seat 5 arranged above it, and a handle arranged in front of the seat 5. 6 is provided, 7 is a bonnet, 8 is a floor, and 9 is a power take-off shaft (see FIG. 4) projecting to the rear surface of the mission case 4.
The tractor body 1 may be provided with a cabin (not shown) that covers the seat 5 portion. The first propulsion shaft 21 is installed between the crank shaft of the engine 3 and the input shaft of the mission case 4, and the second propulsion shaft 22 that is connected to the output shaft of the mission case 4 and extends to the front side is the body frame 2 It is connected to the input shaft of the front differential case 23 installed in the front part. Front wheel axles 24 are connected to drive shafts (not shown) incorporated on the left and right sides of the front differential case 23.
Is the driving wheel. Tires 12 for running on rough terrain such as ultra-low pressure tires and lug tires are attached to the front wheels 11. Further, the front wheel axle 24 is supported by a knuckle 25, and a steering arm 28 is disposed below a steering gear box 27 in which a steering shaft 26 of the steering wheel 6 is incorporated.
Left and right tie rods 29, 29 are connected to. The knuckle 25 is connected to the tie rod 29, so that the front wheels 11 are also steered wheels.

A rear differential is built in the mission case 4, and the left and right sides of the mission case 4 are rear wheel axles 31, 31 as shown in FIGS. 4 and 5.
Is built in. Therefore, the rear wheel 13 also serves as a driving wheel.
The rear wheel 13 is composed of a large-diameter sprocket-shaped wheel having teeth 14 on its outer periphery, and has four-sided window 13
It is formed into a cross-shaped spoke plate by a. Further, behind the rear wheel 13, there are provided a pair of rolling wheels 15 and 15 each having a small diameter roller, and both rolling wheels 15 and 15 located on the left and right of the rolling locus of the rear wheel 13 are common. It is rotatably attached to both ends of the axle 16. A plate-shaped axle support member 32 is joined and integrated with the axle 16. A crawler belt 17 made of rubber is hung on the rear wheel 13 and the rolling wheels 15 and 15, and the crawler belt 17 has lug-shaped protrusions 18 ...

On the other hand, on the rear surface of the transmission case 4, a connecting plate 34 fixed to the front portion of the wheel support frame 33 is fixed by bolt connection. A box-shaped rolling wheel support arm 35 is also attached to the rear portion of the box-shaped rolling wheel support frame 33 so that the length thereof can be freely adjusted, and 36 is an adjusting bolt provided on the rolling wheel support arm 35 . Then, the wheel support arm 35 is attached to the left-right direction (vehicle width
Rolling wheel support pipe (cross member) 37 extending in a direction) are fixedly provided in the middle portion, both of the focusing wheel support pipe 37
Coupling support pieces 38, 38 are provided at the ends . As shown in FIG. 6, the front end portion of the axle support member 32 is coupled to the coupling support piece 38 by a bolt 41, and the axle support is performed at any one of a plurality (three in the illustrated example) of coupling holes 39. The middle portion of the member 32 is connected by a bolt 42. Thereby, the vertical position of the wheel 15 can be adjusted. That is, a semi-crawler type riding work machine
Is a wheel support that extends in the vehicle width direction at the rear of the tractor body 1.
The pipe 37 is attached so that the position can be adjusted only in the machine traveling direction.
However, the axle support member 3 is provided at both ends of the wheel support pipe 37.
2 and 32 are attached so that they can be adjusted to multiple swing angles.
The wheels 15, 15, 1 are attached to these axle support members 32, 32.
5 and 15 axles 16 and 16 are attached.

A pair of left and right turnbuckles 43, 43 are installed between the front portion of the wheel support frame 33 and both ends of the wheel support pipe 37, and the rear wheel axle 3 is provided.
As shown in FIG. 1, a connecting rod 44 whose length is adjustable is provided between the outer peripheral portion of the wheel axle 16 and the outer axle 16 of the wheel 15 . Further, a hydraulic cylinder 51 is installed on the mission case 4, and the hydraulic cylinder 51 includes a pair of left and right lift arms 52, 52. This left and right lift arm 5
Although not shown, the reference numerals 2, 52 are respectively connected to a pair of left and right hitch arms pivotally attached to the side surface of the mission case 4 via connecting rods. As shown in FIG. 2, a hydraulic cylinder 55, a lift arm 56, a hitch arm 57, and a connecting rod 58 are also provided at the front end of the machine body frame 2.

According to the semi-crawler type riding work machine having the above construction, first, the crawler belt 1 is provided on the rear wheels 13, 13.
Since 7 and 17 are provided, steering can be smoothly performed by steering the front wheels 11 and 11, and the crawler belt 1
In addition to the driving force of the front wheels 11, 11, in addition to the driving force of the front wheels 7, 17, that is, the driving force of the tires 12, 12 for running on uneven terrain mounted on the front wheels 11, 11 and the crawler belts 17, 17 is obtained. Improves running performance when driving on soft land such as farmland and snowy roads. Further, since the crawler belts 17, 17 are mounted on the rear wheels 13, 13 and the pair of rolling wheels 15, 15, 15, 15 arranged behind the rear wheels 13, 13, the front wheels 1
1, 11 and the crawler belts 17, 17 are widely separated from each other, that is, a semi-crawler type has a large wheel base, and therefore stability on sloping ground can be obtained.

Since the crawler traveling device at the rear of the tractor body 1 has a structure in which the roller support frame 33 is fixed to the rear portion of the tractor body 1, the rear wheel 13 of the rear wheel 13 when traveling on a soft land such as farmland or snowy road. The lifting of the rolling wheels 15 via the crawler belt 17 due to the driving force is prevented, and a reliable grounding state from the front part to the rear part of the crawler belts 17 on the rear wheel 13 side and the rolling wheel 15 side ensures a smooth ground contact. Not only the stability but also the running performance can be further improved. Further, by changing the coupling relationship of the axle support member 32 with respect to the wheel support frame 33, that is, with the left and right coupling support pieces 38, 38 provided on the wheel support frame 33 side, both axle support members 32, 3 are connected.
By changing the position of each bolt 41, 42 of 2,
Since the vertical position of 15, 15, 15 can be adjusted , the tire 12 for rough terrain traveling , even when the wheel diameters of the front wheels 11, the rear wheels 13, and the rolling wheels 15 are changed,
Crawler belt 17 by rear wheel 13 and rolling wheels 15, 15.
It is possible to easily obtain a reliable grounding state due to, and further improve the stability and running performance on slopes.

In the embodiment, the wheel support pipe 3 is also used.
The intermediate portion of 7 is fixed to a substantially horizontal roller support frame 33 connected to the rear of the tractor body 1, and further left and right between the front portion of the roller support frame 33 and both ends of the roller support pipe 37. Due to the structure in which the pair of turnbuckles 43, 43 are installed, a load carrier space can be obtained on a substantially horizontal plane by the roller support frame 33, the roller support pipe 37, and the turn buckles 43, 43. Then, various working machines and equipment necessary for the work can be loaded and transported. Further, by connecting various working machines such as a rotary cultivator (not shown) to the hitch arm and connecting them to the power take-off shaft 9 behind the tractor machine body 1, it is possible to deal with various kinds of work.

Regarding the connection of the axle support member to the roller support frame, an appropriate structure may be adopted in addition to the embodiment, and the point is that it is possible to adjust the vertical position of the roller. Further, it is needless to say that the specific structures of the rear wheels, the rolling wheels, etc. can be changed appropriately.

[0015]

As described above, according to the semi-crawler type riding work machine of the present invention, since the crawler belt is hung on the rolling wheels and the rear wheels arranged in front of the rolling wheels , a large distance is provided between the front wheels and the crawler belt. In addition to the stability,
In particular, the crossme
Mount the unit so that the position can be adjusted only in the machine running direction.
Axle support members at both ends of the
Since it is mounted so that it can be adjusted to the swing angle, it is possible to prevent the rolling wheels from rising when driving on soft ground such as farmland or snowy roads , and to prevent the rear wheels from floating when climbing up a sloping ground from flat ground.
Since it is possible to prevent running, the running performance is improved, and the vertical position of the rolling wheels can be adjusted by changing the connecting relationship of the axle support member to the cross member . As a result, it is possible to obtain a reliable grounding state by the rear wheels and the crawler belt by the rolling wheels, and therefore the running performance and stability on slopes can be greatly improved. In addition, a semi equipped with a wheel that can move up and down.
For crawler-type riding work machines, on soft land such as farmland and snowy roads.
The structure that prevents the wheels from rising when running at
Can be achieved. In addition, a semicycle equipped with a vertically movable wheel
Adjusting the mounting height of the roller in a roller-type riding work machine
When replacing the crawler belt, when
When the belt stretches, you can easily adjust the tension of the crawler belt.
Wear.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a semi-crawler type riding work machine to which the present invention is applied.

FIG. 2 is a cutaway side view showing the drive system.

FIG. 3 is a schematic plan view of a semi-crawler type riding work machine to which the present invention is applied.

FIG. 4 is a perspective view showing a configuration of a crawler traveling device portion including a rear portion of the body.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view showing an example of a coupling structure of axle support members for a wheel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tractor body, 11 ... Front wheel, 13 ... Rear wheel, 15 ... Rolling wheel, 16 ... Axle, 17 ... Crawler belt, 31 ... Rear wheel axle, 32 ... Axle support member, 33 ... Rolling wheel support frame, 3
5 ... Roller support arm, 36 ... Adjustment bolt, 37 ... Cross
Member (roller wheel support pipe), 38 ... Coupling support piece, 39 ...
Coupling holes, 41, 42 ... Bolts.

Claims (1)

[Claims] 1. A tractor body extending rearward in the vehicle width direction.
The position of the cross member can be adjusted only in the machine running direction.
Attach the axle support members to both ends of this cross member.
Adjustable mounting for several swing angles to support these axles
Axle of the wheel is attached to the member, and the wheel is attached to these axles
And the claw label between the rear wheel and the front wheel
A semi-crawler type rider characterized by being
Working machine.