JPH04303079A - Semi-crawler type riding farm working machine - Google Patents

Abstract

PURPOSE:To make improvements in ridability and stability largely on a slope, by locking a roller wheel support frame to the rear of a machine body, preventing any flotage of a roller wheel at time of running on soft ground such as farmland and a snow-laden road or the like, while changing the connection relation of an axle member with the roller wheel support frame, thereby making each of vertical positions of the roller wheel adjustable, and securing a positive grounded state by means of crawler belts 17 through a front wheel, a rear wheel and the roller wheel even in case of wheel diametral variations and so on. CONSTITUTION:In a semi-crawler type farm working machine being composed of installing a symmetrical pair of roller wheels 15 in the rear of a machine body 1 and providing a symmetrical pair of crawler belts 17 wrapped on these roller wheels 15 and rear wheels 13, a roller wheel support frame 33 supporting these symmetrical roller wheels 15 is locked the rear of the machine body 1, and an axle support member 32 supporting each axle 16 of these roller wheels 15 is connected to the frame 33 so as to make each of vertical positions of these roller wheels 15 adjustable.

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 working machine in which a crawler belt is attached to a rear wheel and a roller behind the rear wheel.

0002

[Prior Art] In a rear-wheel drive riding working machine such as an agricultural tractor, a track wheel is provided at a distance behind the rear wheel, and a crawler belt is attached to the track wheel and the rear wheel. It is known from the specification No. 2,722,280.

0003

[Problem to be Solved by the Invention] However, since the structure was adopted in which the wheels were supported at the rear of the aircraft so that they could move up and down, the wheels could sometimes be lifted up via the crawler belt due to the driving force of the rear wheels. The problem was that running performance deteriorated when driving on soft ground such as farmland or snow-covered roads.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a large space between the front wheels and the crawler belt, and to prevent the wheels from lifting up when driving on soft ground such as farmland or snowy roads.
An object of the present invention is to provide a semi-crawler type riding working machine that can securely ground a front wheel, a rear wheel, and a crawler belt formed by wheels even when the wheel diameter changes, thereby improving running performance and stability on slopes, etc. .

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a pair of left and right track wheels at the rear of the aircraft body, and a pair of left and right crawler belts that are hung over the track wheels and the rear wheels. The semi-crawler type riding work machine is provided with a wheel support frame that supports the left and right wheels, and the wheel support frame is fixed to the rear of the machine body, and an axle support that supports the axle of the wheel. The present invention is characterized in that a member is provided, and the axle support member is coupled to the wheel support frame so that the vertical position of the wheel can be adjusted.

[0006]

[Effect] Since the crawler belt is attached to the rear wheel and the roller located behind it, the distance between the front wheel and the crawler belt is large, and in addition to providing stability, the roller support frame By fixing the wheel to the rear of the machine, it is possible to prevent the wheel from lifting when driving on soft ground such as farmland or snowy roads.Moreover, by changing the coupling relationship of the axle support member to the wheel support frame, the wheel can be easily moved. By being able to adjust the vertical position, the front wheel and
Since reliable ground contact with the crawler belt by the rear wheels and rollers can be obtained, running performance and stability can be greatly improved, especially on slopes and the like.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples 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 working machine to which the present invention is applied, 1 is a tractor body;
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 part of this body frame 2, a mission case 4 installed at the rear of the body frame 2, a seat 5 arranged above it, and a handle arranged in front of it. 6, 7 is a bonnet, 8 is a floor, and 9 is a power take-off shaft (see FIG. 4) that projects from the rear surface of the transmission case 4. The tractor body 1 may be provided with an unillustrated cabin that covers the seat 5 portion. A first propulsion shaft 21 is installed between the crankshaft of the engine 3 and the input shaft of the mission case 4, and a second propulsion shaft 22 connected to the output shaft of the mission case 4 and extending forward is connected to the fuselage frame 2. It is connected to the input shaft of a front differential case 23 installed at the front. A front wheel axle 24 is connected to drive shafts (not shown) built into the left and right sides of this front differential case 23, and therefore the front wheels 11
forms the driving wheel. The front wheels 11 are equipped with tires 12 for running on rough terrain, such as ultra-low pressure tires or lug tires. Further, the front wheel axle 24 is supported by a knuckle 25,
A steering arm 28 is disposed below a steering gear box 27 into which a steering shaft 26 of the handle 6 is incorporated, and left and right tie rods 29, 29 are connected to this steering arm 28. A knuckle 25 is connected to this tie rod 29, so the front wheel 11 is also a steered wheel.

A rear differential is built into the transmission case 4, and rear axles 31, 31 are installed on the left and right sides of the transmission case 4, as shown in FIGS. 4 and 5. Therefore, the rear wheel 13 also serves as a driving wheel. This rear wheel 13 is composed of a large diameter sprocket-like wheel with teeth 14 on the outer periphery, and has window portions 13 on four sides.
It is formed into a cross-shaped spoke plate shape by a. Further, behind the rear wheel 13, a pair of rolling wheels 15, 15 made of small-diameter rollers are arranged, respectively. It is rotatably attached to both ends of the axle 16. This axle 1
A plate-shaped axle support member 32 is integrally connected to 6. A crawler belt 17 made of rubber is attached to the rear wheel 13 and the wheels 15, 15, and the crawler belt 17 has lug-shaped protrusions 18 on its outer periphery.

On the other hand, on the rear surface of the transmission case 4, a connecting plate 34 is fixed to the front part of the wheel support frame 33 by bolt connection. At the rear of the box-shaped wheel support frame 33, a wheel support arm 35, which is also box-shaped, is attached so as to be adjustable in length, and 36 is an adjustment bolt provided on the wheel support arm 34. A wheel support pipe 37 extending in the left-right direction is fixed at the intermediate portion of the wheel support arm 35, and coupling support pieces 38, 38 are provided at both ends of the wheel support pipe 37. As shown in FIG. 6, the front end of the axle support member 32 is connected to this connection support piece 38 with a bolt 41, and a plurality of (three in the illustrated example) connection holes 3 are connected to the connection support piece 38.
9..., the intermediate portion of the axle support member 32 is coupled with a bolt 42. This allows the vertical position of the wheel 15 to be adjusted.

A pair of left and right turnbuckles 43, 43 are installed between the front part of the wheel support frame 33 and both ends of the wheel support pipe 37, and the rear wheel axle 3
1 and the outer end of the wheel axle 32, a connecting rod 44 whose length is adjustable is installed as shown in FIG. Furthermore, a hydraulic cylinder 51 is installed on the mission case 4, and this hydraulic cylinder 51 is connected to a pair of left and right lift arms 52.
, 52. These left and right lift arms 52,5
2 is connected to a pair of left and right hitch arms pivoted to the side surface of the transmission case 4 via connecting rods, although not shown. Further, as shown in FIG. 2, the front end of the body frame 2 is also provided with a hydraulic cylinder 55, a lift arm 56, a hitch arm 57, and a connecting rod 58.

According to the semi-crawler type riding machine having the above configuration, first, the crawler belt 1 is attached to the rear wheels 13, 13 side.
7 and 17, smooth steering can be achieved by steering the front wheels 11 and 11, and the crawler belt 1
In addition to the driving force from 7, 17, the front wheels 11, 11 can also obtain driving force, that is, the driving force can be obtained from the rough terrain tires 12, 12 attached to the front wheels 11, 11 and the crawler belts 17, 17. This improves drivability when driving on soft ground such as farmland or snow-covered roads. In addition, since crawler belts 17, 17 are attached to the rear wheels 13, 13 and a pair of roller wheels 15, 15, 15, 15 arranged behind the rear wheels 13, 13, the front wheels 11
, 11 and the crawler belts 17, 17, that is, even though it is a semi-crawler type, the wheel base can be large, so stability on slopes etc. can be obtained.

The crawler traveling device at the rear of the tractor body 1 has a structure in which the wheel support frame 33 is fixed to the rear of the tractor body 1, so that the rear wheels 13 are not easily moved when traveling on soft ground such as farmland or snowy roads. It prevents the rolling wheels 15 from floating up through the crawler belts 17 due to the driving force, and ensures reliable grounding from the front to the rear of the crawler belts 17 on the rear wheels 13 and rolling wheels 15 sides, making it possible to operate on slopes, etc. Not only stability but also running ability can be further improved. Furthermore, the connection relationship of the axle support member 32 to the wheel support frame 33 is changed, that is, both axle support members 32, 3 are connected to left and right connection support pieces 38, 38 provided on the side of the wheel support frame 33.
By changing the position of each bolt 41, 42 of 2, the rolling wheels 15,
15, 15, 15 can be adjusted in the vertical direction, even if the diameters of the front wheels 11, rear wheels 13, and wheels 15 change, the front tires 12 and rear wheels 13 can be adjusted.
A reliable grounding condition can be easily obtained by the crawler belt 17 by the rollers 15, 15, and stability and running performance on slopes etc. can be further improved.

In the embodiment, the wheel support pipe 3
7 is fixed to the substantially horizontal wheel support frame 33 connected to the rear of the tractor body 1, and furthermore, the left and right sections are fixed between the front part of the wheel support frame 33 and both ends of the wheel support pipe 37. Due to the structure in which the pair of turnbuckles 43, 43 are installed, a cargo platform space is obtained on a substantially horizontal plane formed by the wheel support frame 33, the wheel support pipe 37, and the turnbuckles 43, 43, so a cargo platform can be installed on this, etc. It is also possible to load and transport various work machines and equipment necessary for the work. Furthermore, by connecting various working machines such as a rotary tiller (not shown) to the hitch arm and connecting to the power take-off shaft 9 at the rear of the tractor body 1, it is of course possible to handle various types of work.

[0014] Regarding the connection of the axle support member to the wheel support frame, any suitable structure may be adopted in addition to the embodiments, as long as the vertical position of the wheel can be adjusted. It goes without saying that the specific structures of the rear wheels, wheels, etc. can also be changed as appropriate.

[0015]

[Effects of the Invention] As described above, according to the semi-crawler type riding machine of the present invention, since the crawler belt is attached to the rear wheel and the rollers disposed behind it, the distance between the front wheel and the crawler belt is greatly increased. In addition to providing stability,
In particular, since the wheel support frame is fixed to the rear of the aircraft, it is possible to prevent the wheel from lifting up when driving on soft ground such as farmland or snowy roads.Moreover, the connection of the axle support member to the wheel support frame is The vertical position of the wheels can be adjusted by changing the wheel diameter, so even if the wheel diameter changes, the front wheels and the crawler belt formed by the rear wheels and wheels can maintain a secure ground contact. The running performance and stability of the vehicle can be greatly improved.

[Brief explanation of the drawing]

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

[Figure 2] A cutaway side view showing the drive system.

[Fig. 3] Schematic plan view of a semi-crawler type riding work machine to which the present invention is applied

[Fig. 4] A perspective view showing the configuration of the crawler traveling device including the rear part of the fuselage.

[Figure 5] Same plan view

[Fig. 6] A side view showing an example of a coupling structure of a wheel axle support member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Tractor body, 11... Front wheel, 13... Rear wheel, 15... Rolling wheel, 16... Rolling wheel axle, 17... Crawler belt, 32... Axle support member, 33... Rolling wheel support frame, 38... Connection support piece.

Claims (1)

[Claims] 1. A semi-crawler type riding working machine comprising a pair of left and right track wheels arranged at the rear of the machine body, and a pair of left and right crawler belts hooked to the track wheels and the rear wheels, wherein the left and right track wheels A wheel support frame is provided to support the wheel support frame, and the wheel support frame is fixed to the rear of the aircraft body,
A semi-crawler type passenger vehicle, characterized in that an axle support member for supporting the axle of the roller is provided, and the axle support member is coupled to the roller support frame so that the vertical position of the roller can be adjusted. work equipment.