JP2002284050A - Crawler traveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve attitude stability in entering a paddy field with a front edge tilted diagonally downward. SOLUTION: Among a plurality of ground rolling wheels 9 arranged in parallel in the longitudinal direction for guiding the ground side of a crawler belt 14, one ground rolling wheel positioned in the front end and the following one are supported by a track frame 8 freely oscillationally in the opposite directions vertically around a lateral shaft core P1 positioned between them. A regulating means 18 restricting upward oscillation of the ground rolling wheel 9 positioned in the front end is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device used as a traveling device of a combine, and more particularly, to a front end of a plurality of ground wheels that are arranged side by side in the front-rear direction and guide the ground side of a crawler belt. , And the one immediately after it are supported by a track frame so as to be able to swing back and forth up and down around a left-right axis located in the middle of them.

[0002]

2. Description of the Related Art In a crawler traveling apparatus of this type, a ground contact wheel located at a front end and a ground contact roller located immediately behind the front contact wheel swing up and down reciprocally. There is an advantage that the rider can smoothly ride over the unevenness of the ground at the front part by the upside-down swing, thereby improving the riding comfort.

[0003] As a crawler traveling device having such advantages, conventionally, the upward swing of the ground contact wheel at the front end has been allowed freely.

[0004]

However, according to the above-mentioned prior art, since the contact wheel at the front end can freely swing upward, the front end is directed obliquely downward from a ridge or a road to a field. When riding in, the grounding wheel at the front end is pushed upward and rocked by the ground pressure and escapes with the grounding of the front end, and it is difficult to expect ground support by stepping on the grounding wheel at the front end, and the posture tends to be unstable Was something.

It is an object of the present invention to improve the posture stability when entering a field with its front end obliquely downward.

[0006]

The features, functions and effects of the crawler traveling device according to the present invention according to claim 1 are as follows.

[Features] Of a plurality of ground contact rollers which are arranged side by side in the front-rear direction and guide the contact side of the crawler belt, the one located at the front end and the one located immediately behind the right-hand axis are located at right and left between them. A crawler traveling device supported on a track frame so as to be able to swing back and forth around a core, wherein a regulating means for regulating upward swinging of a ground contact wheel located at the front end is provided. .

[Operation] Since a regulating means is provided to regulate the upward swing of the contact wheel located at the front end, the regulating position is appropriately set so that the contact wheel located at the front end is set. While allowing a certain amount of reciprocal vertical swing with the grounding wheel located immediately after that, when entering the farm from the ridge or road with the front end diagonally downward, the grounding wheel located at the front end The swing of the contact wheel is restricted by the contact pressure, so that the contact wheel can be prevented from swinging upward without limitation, and can be stepped on by the contact wheel located at the front end.

[Effect] Therefore, while improving the riding comfort by reciprocating up-and-down swinging of the ground contact wheel located at the intended front end and the ground contact wheel located immediately behind, the front end is inclined obliquely downward. At the time of entry into the field, the front end can be stably supported by the contact wheel located at the front end to stabilize the posture, and the performance of entry into the field can be improved.

The features, operations and effects of the crawler traveling device according to the present invention according to claim 2 are as follows.

[Features] In the crawler traveling device according to the first aspect of the present invention, the regulating means is a means capable of adjusting a regulating position up and down.

[Operation] Since the upward regulation position of the ground contact wheel located at the front end can be adjusted up and down, the regulation position is raised and lowered in accordance with conditions when riding in a field, for example, the degree of forward fall. When the vehicle is driven into the field, it is possible to reliably step on the grounding wheel located at the front end, but the grounding wheel located at the front end and the grounding wheel located immediately after that can be depressed. The reciprocal vertical swing range can be made as large as possible.

[Effects] Therefore, it is possible to maintain a good riding comfort by swinging the desired ground contact rolling wheel upside down, while having excellent entry performance to the field.

The features, operations and effects of the crawler traveling device according to the third aspect of the present invention are as follows.

[Features] In the crawler traveling device according to the present invention according to the first or second aspect of the present invention, the one of the contact rollers located at the rear end and the one located immediately before the contact rollers is positioned at the middle between them. To support the track frame so that it can swing back and forth up and down around the orientation axis, and to prevent derailment that is engaged between the left and right core metal projections on the inner circumference of the crawler belt behind the ground contact wheel located at the rear end. And a regulating portion for regulating upward swinging of the ground contact wheel located at the rear end is formed on the guide.

[Operation] The grounding wheel located at the rear end and the grounding wheel located immediately before it are reciprocally oscillated up and down. It is possible to get over the unevenness smoothly.

In addition, a guide for preventing the wheel from slipping off between the left and right metal core projections on the inner circumference of the crawler belt is provided behind the ground contact wheel located at the rear end. The derailment can be suppressed by engaging the vehicle.

Incidentally, in the crawler traveling device, when traveling on a rough field, it may be inclined backward. In such a case, if the grounding wheel located at the rear end can swing freely upward, the grounding wheel located at the rear end swings upward with the ground pressure and does not depress, and the posture is not changed. It may become unstable and cause pitching. In the present invention, by focusing on the above points, a regulating portion is formed to regulate the upward swing of the ground contact wheel located at the rear end. , The posture can be stabilized by stepping on the grounding wheel located at the position. In addition, since the guide is provided near the rear of the contact wheel located at the rear end thereof, the guide is provided with the restricting portion. Therefore, the guide can be used also as the restricting portion.

[Effect] Therefore, the riding comfort can be further improved and the ability to prevent derailing can be improved. In addition, even in a rough field, running while suppressing the occurrence of pitching due to backward tilting is performed. The stability can be improved, and the structure can be implemented simply and inexpensively.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a combine has a threshing device 3 and a grain storage tank 4 mounted side by side on a rear portion of a body frame 2 provided with a pair of right and left crawler traveling devices 1. At the front of the body frame 2, a cutting device 5 for cutting the planted grain culm and supplying it to the threshing device 3 is swingably moved up and down, and a boarding operation unit 6 is mounted. A lift cylinder 7 using a hydraulic cylinder for raising the mowing device 5 and lowering the mowing device 5 by its own weight with drainage is provided.

As shown in FIGS. 2 and 3, each of the crawler traveling devices 1 has six grounding rollers 9 juxtaposed in the front-rear direction on a track frame 8 connected to the body frame 2. Support and rear tension wheel 1
0 is supported and one upper wheel 9A is supported. A drive sprocket wheel 13 is attached to an end of an axle 12 extending from a transmission case 11 supported by the body frame 2 in an integrally rotating state. Wheel 9, upper wheel 9A,
Rear tension wheel 10, drive sprocket wheel 13
And is wound around a crawler belt 14.

The track frame 8 includes a fixed frame 8A fixed to the body frame 2 and a fixed frame 8A.
A movable frame 8C supported vertically movable via a pair of front and rear links 8B, and a hydraulic cylinder 8 acting on each of the front and rear links 8B to move the movable frame 8C up and down.
F, 8R, the movable frame 8C and the rear link 8B.
And an intermediate link 8E interposed between the movable frame 8C and the movable frame 8C to smoothly move the movable frame 8C up and down.

The contact wheel 9 is connected to the crawler belt 1.
4, and is supported by the movable frame 8C together with the rear tension wheel 10. That is, by moving the movable frame 8C of the left and right crawler traveling device 1 up and down as appropriate, the body frame 2
Height adjustment and rolling adjustment can be performed, and the pitching adjustment can be performed by swinging the front and rear links 8B individually to change the attitude of the movable frame 8C.

The front two ground wheels 9 of the ground wheels 9
As shown in detail in FIGS. 4A and 4B and FIG. 5, the unit is supported by the front sub-frame 15 and is unitized. The movable frame 8C is swingably movable so that the two ground contact wheels 9 swing back and forth up and down around the left-right axis P1 located at
Attached to.

Similarly, the two ground contact wheels 9 in the middle between the front and rear of the ground contact wheels 9 are also supported by the intermediate sub-frame 16 and are unitized. The two ground contact wheels 9 are attached to the movable frame 8C so as to swing up and down so as to swing up and down around the left-right axis P2 located at the front and rear middle.

Further, as shown in detail in FIGS. 6 and 7, the rear two grounding wheels 9 of the grounding wheel 9 are supported by the rear sub-frame 17 and are unitized. The two grounding wheels 9 are attached to the movable frame 8C so as to swing up and down so as to swing back and forth around a left-right axis P3 located in the middle of the front and rear wheels.

The upper rolling wheel 9A guides the non-ground side of the crawler belt 14, and is provided with the fixed frame 8
A is supported.

Then, by contacting the front sub-frame 15, the upward swing of the contact wheel 9 located at the front end of the front sub-frame 15 slightly exceeds the position of the contact wheel 9 located immediately after. There is provided a regulating means 18 for regulating the upward swing of the body. The restricting means 18 is a bolt screwed to the movable frame 8C so that the restricting position can be adjusted up and down.

As shown in FIGS. 6 and 7, the crawler belt 14 is located behind the contact wheel 9 at the rear end.
A sled-shaped guide 20 for preventing derailing, which is engaged between the left and right metal core projections 19 located on the inner periphery of the vehicle, is mounted on the movable frame 8C. The guide 20 has a rear sub-frame. A restricting portion 20a that restricts upward swinging of the ground contact wheel 9 located at the rear end by contacting with the roller 17 is integrally formed.

Further, the ground contact wheel 9 is engaged with the outer surfaces of the left and right metal core projections 19 so that the crawler belt 14 is engaged therewith.
The front sub-frame 15, the intermediate sub-frame 16, and the rear sub-frame 17.
As in the case of the guide 20, there are provided sled-shaped guide portions 15a and 16 for preventing the wheel from coming off, which are engaged between the left and right metal core projections 19.
a, 17a are formed.

[Alternative Embodiment] In the above embodiment, the crawler traveling device of the combine is shown. However, the present invention can be applied to a crawler traveling device of a construction machine other than an agricultural machine.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a side view of the crawler traveling device.

FIG. 3 is a plan view of a main portion of the crawler traveling device.

FIG. 4 is a cutaway side view showing the operation of the front portion of the crawler traveling device.

FIG. 5 is a vertical front view of a front portion of the crawler traveling device.

FIG. 6 is a cutaway side view of the rear part of the crawler traveling device.

FIG. 7 is a vertical front view of the rear part of the crawler traveling device.

[Explanation of symbols]

 Reference Signs List 14 Crawler belt 9 Ground wheel P1 Left and right axis 8 Track frame 18 Restriction means P3 Right and left axis 19 Core projection 20 Guide 20a Restriction

Continued on the front page (72) Inventor, Yoshiaki Takeuchi 64, Ishizukita-cho, Sakai-shi, Osaka, Japan Inside Kubota Sakai Works, Ltd. (72) Inventor Chiharu Kamikita 64 Ishizukita-cho, Sakai-shi, Osaka F-term in Kubota Sakai Works Co., Ltd. (Reference) 2B076 AA03 BA05 CC02

Claims (3)

[Claims] 1. A left-right axis centered between a front roller and a roller immediately following a plurality of ground rollers that guide the ground side of a crawler belt juxtaposed in the front-rear direction. A crawler traveling device which is supported on a track frame so as to be able to swing back and forth up and down around the crawler traveling device, wherein a crawler traveling device provided with regulating means for regulating upward swinging of a ground contact wheel located at the front end. 2. The crawler traveling device according to claim 1, wherein said regulating means is means capable of adjusting a regulating position up and down. 3. A track frame which is located at the rear end and which is located immediately before the grounding wheel is supported by a track frame so as to be able to swing upside down and up and down around a left-right axis centered therebetween. Behind the grounding wheel located at the rear end, there is provided a guide for preventing the wheel from coming off, which is engaged between the left and right metal core projections on the inner periphery of the crawler belt, and this guide is provided with the grounding wheel located at the rear end. 3. The crawler traveling device according to claim 1, wherein a regulating portion for regulating upward swing of the wheel is formed.