JP3666956B2 - Traveling device for traveling work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler type traveling device configured in a traveling working machine such as a combine and a transport vehicle.
[0002]
[Prior art]
A conventional combine crawler type traveling device is configured to run by arranging and supporting a plurality of wheels on the grounded inner surface of a crawler stretched between a driving wheel and an idler wheel provided before and after the traveling frame. Has been.
[0003]
[Problems to be solved by the invention]
However, it is common that all the rolling wheels of the traveling device according to the conventional configuration are formed with the same diameter and the same width, and when these rolling wheels are arranged in a traveling frame, the crawler inner portion Therefore, there is a drawback that the mud that has entered the crawler cannot be discharged well, and the cleaning work for removing the mud becomes complicated.
[0004]
In addition, the middle roller disposed in the center of the crawler has a smaller travel load than the other front and rear wheels, but is formed to be wide like the other ones. There is a problem in that it is easy to generate noise at the time, the installation space of the upper roller wheel above this is narrowed , the installation mechanism is restricted, and the upper inner surface of the central part of the crawler cannot be supported and transferred properly. is there.
[0005]
[Means for Solving the Problems]
The traveling device of the traveling working machine of the present invention, which aims to solve the above-mentioned problems, stretches a crawler 5 between drive wheels 2a and idler wheels 2b provided before and after the traveling frame 3, and the crawler 5 In the crawler type traveling device that provides a plurality of lower rollers 6 on the ground contact side and supports the intermediate position of the upper portion of the crawler 5 by the upper rollers 7, and the plurality of lower rollers 6 It rolls on both outer sides of the core metal projection 5a of the crawler 5, the front roller 60 and the rear roller 61 disposed on the front and rear sides of the plurality of lower rollers 6 are enlarged in diameter, A plurality of intermediate rollers 62 and 63 that are grounded between 61 are made smaller in diameter, and the width of the rolling contact surface 6a on the outer side of the front and rear wheels 60 and 61 is set on the outer side of the intermediate rollers 62 and 63. It is formed wider than the width of the rolling contact surface 6b .
[0006]
The front rolling wheel 60 and the rear rolling wheel 61 have a large diameter D and a wide width of the outer rolling contact surface 6a so as to reliably bear the pressing force acting on the crawler 5. Further, the intermediate rolling wheels 62 and 63 are made smaller in diameter d, and the width of the outer rolling contact surface 6b is made narrower than the width of the outer rolling contact surface 6a of the front rolling wheel 60 and the rear rolling wheel 61. However, the reason why the diameter d of the intermediate rollers 62 and 63 is smaller than the diameter D of the front roller 60 and the rear roller 61 is that the intermediate portion of the crawler 5 bears a pressing force smaller than the pressing force. Because it is good only.
[0007]
In this intermediate portion, it is necessary to easily discharge the mud that has entered the inner surface of the crawler 5 and to provide a sufficient gap between the upper roller 7 and the intermediate rollers 62 and 63.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a machine frame 3 having a crawler type traveling device 2 according to the present invention, which supports a reaping part 4 from the front so that it can be moved up and down, is equipped with a threshing part 4a, and a control part 4b is installed on the other side. It is a combine.
[0009]
As shown in FIG. 2, the traveling device 2 includes a drive wheel 2 a that is pivotally supported by a transmission case 1 a on the front side of the airframe, and a plurality of support arms 3 a that protrude downward from the airframe frame 3 (FIG. 5). The crawler 5 is stretched between the rear portion of the traveling frame 30 supported at the tip of the traveling frame 30 and the idler wheel 2b pivotally supported so as to be adjustable in the longitudinal direction, and the grounding side of the crawler 5 is traveled by a group of lower rollers 6 described later. While guiding, the upper side is received and guided by the upper roller 7.
[0010]
In this embodiment, the lower rollers 6 are arranged such that six front and rear rollers on the ground-contact inner surface of the crawler 5 are substantially equidistant shafts. A pair of rear wheels 61 are supported by a mounting bracket 31 (FIGS. 4 and 5) formed on the traveling frame 30 so as to be freely rotatable.
The diameters of the front and rear wheels 60 and 61 are set to D, and the intermediate rollers 62 and 63 formed to have a smaller diameter d are pivotally supported at the center portion of the contact length between the two. A large gap for soil removal is formed between adjacent rollers, and a large space is formed above the inner surface of the crawler 5 so that the upper roller 7 can be installed with a margin. I have to.
[0011]
The reason why the diameter d of the intermediate rollers 62 and 63 is smaller than the diameter D of the front and rear wheels 60 and 61 is that there is a gap between the intermediate rollers 62 and 63 and the upper roller 7. This is to make it easier to remove the soil and to allow the vertical movement of the crawler 5 by the vertical movement of the intermediate roller 62.
Then, the intermediate roller 62 on the front side is rotatable on a mounting bracket 32 formed above the traveling frame 30 so that a support shaft 65 of a support arm 64 (FIG. 2) that supports the intermediate roller 62 is rotatable. In addition to being pivotally supported, a spring 66 (FIG. 3) is provided between the support arm 64 and the traveling frame 30 so as to swing and rotate. As a result, when the crawler 5 travels on the ground convex portion, the intermediate roller 62 can freely move up and down around the support shaft 65 against the spring 66 at the center. It is possible to satisfactorily prevent the aircraft from being dumped or rolled and to smoothly travel.
[0012]
On the other hand, the rear intermediate roller 63 is pivotally supported on the mounting bracket 31 so as to be able to make rolling contact with the crawler 5 similarly to the rear roller 61.
The upper roller 7 receives the upper inner side of the crawler 5 with a support shaft 63a extending from the body frame 30 side at a position above the intermediate roller 63 and deviating from the rotation trajectory of the intermediate roller 62. It is installed to guide rolling contact.
[0013]
3 and 4, the outer rolling contact surface 6a of the front rolling wheel 60 and the rear rolling wheel 61 that are in rolling contact with both sides of the core metal projection 5a of the crawler 5 is a crawler load. Is formed in a wide L dimension so as to prevent deformation of the rubber crawler. The rolling contact surfaces 6b of the intermediate rolling wheels 62 and 63 and the upper rolling wheel 7 are formed to have a narrower n dimension than this, so that the rolling contact resistance can be reduced.
[0014]
As a result, the front roller 60 and the rear roller 61 having the wide rolling contact surface 6a receive the load and impact force greatly applied to the front and rear of the traveling device 2 as the combine 1 travels, and the crawler 5 is locally deformed. In addition, the contact resistance is reduced by guiding the rolling contact with the narrow rolling contact surfaces 6b of the intermediate rolling wheels 62 and 63 at the center of the crawler 5, thereby generating noise during rolling at this portion. And to allow local bending deformation to the upper inside of the crawler 5 with flexibility so that smooth running with less vibration and noise can be performed satisfactorily. Yes.
[0015]
Reference numerals 67 and 68 denote crawler guides that are slidably guided by entering between the core metal projections 5a of the crawler 5 at the front and rear wheels 60 and 61, respectively.
Further, the idler wheel 2b is provided with a soil avoidance guide 20 that moves the soil that has entered the inner surface of the crawler 5 to the outside as shown in FIG. The earth guide 20 is attached to the support member 22 that pivotally supports the idler wheel 2b from the traveling frame 30 so that the upper portion of the elastic bent plate 21 is swingable by a predetermined amount, and its lower surface is brought close to the inner surface of the crawler 5. I am doing so. The support member 22 is provided with a compression restricting member 23 made of a coil spring for preventing the bent plate 21 from being deformed.
[0016]
With this configuration, when the bent plate 21 is greatly bent upward due to the biting of a mass of earth or stone, the contact is restricted by the compression restricting member 23 so that the discharging action is good, and the bent plate 21 is damaged. Is preventing. The traveling device 2 configured as described above has a large diameter and rolling contact, although the front and rear portions of the crawler 5 are subjected to a large traveling load and impact by the uneven portions of the ground or the convex portions of the earth, stones, etc. when the aircraft moves forward and backward. by surface 6a it is is formed on Hirohaba L, which while stable well received, to prevent deformation of the front and rear ends of the crawler 5 can perform smooth running.
[0017]
When the convex portion reaches the central portion of the traveling device 2 as the airframe travels, the intermediate roller 62 is retracted upward against the spring 66 (FIG. 3) due to the resistance, and the crawler 5 moves upward. And the occurrence of damping and rolling of the airframe due to the convex portion is prevented. Further, since the rollers 62 and 63 in the central portion have a diameter d smaller than the diameter D of the wheels 60 and 61 and have a large interval between the rollers , the crawler 5 at this portion travels along the unevenness of the ground. It is easy and generation | occurrence | production of a vibration etc. can be suppressed.
[0018]
Further, since the intermediate rolling wheels 62 and 63 and the upper rolling wheel 7 have the rolling contact surface 6b having a narrow width n, the noise generated when the rolling contact with the crawler 5 is reduced, so that traveling noise can be suppressed. it can. Furthermore, since the middle rollers 62 and 63 and the upper roller 7 are installed in a compact manner with a sufficient interval between the wheels at a relatively small central portion of the traveling load, mud and dirt that intrude during traveling are discharged. , And the mud removal cleaning work at the end of the work can be performed easily and appropriately.
[0019]
Furthermore, since the upper roller 7 can be provided in the center of the traveling device 2 above the intermediate rollers 62 and 63 formed with a small diameter d while forming a sufficient gap for soil removal, the crawler 5 Sagging can be prevented satisfactorily. Since the plurality of intermediate wheels 62 and 63 movably support the front intermediate roller 62 located on the forward travel side, the second intermediate wheels 62 and 63 are placed in a state where the running resistance and impact caused by the convex portions on the ground are alleviated. Thus, it is possible to provide the traveling device 2 that has an advantage that the crawler 5 can be traveled and guided by the intermediately-rolled wheels 63 that are fixedly supported.
[0020]
【The invention's effect】
The invention of claim 1, to form a shock due Setto between forward and reverse travel excessive traveling load and stones and the like according to the crawler 5 during the Hirohaba a rolling contact surface 6a at the large diameter before and after the crawler 5 Kotenwa 61 and the front rolling wheel 60, and the crawler 5 is guided in rolling contact, and is rolled by a plurality of intermediate rolling wheels 62 and 63 having a narrow and narrow rolling contact surface 6b at the center of the crawler 5. By rolling and guiding the crawler 5 in a state where the resistance is reduced, it is possible to provide a traveling device for a traveling working machine that can perform smooth traveling with less noise and vibration.
[0021]
According to the second aspect of the present invention, since the rolling wheel spacing for soil removal can be obtained at the center of the crawler 5, the mud can be removed well and the upper rolling wheel 7 can be made compact in the upper space. Can be installed.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic structure of a combine.
FIG. 2 is a side view of the traveling device.
FIG. 3 is a plan view of FIG. 2;
FIG. 4 is a cross-sectional view showing a front wheel and an upper wheel.
FIG. 5 is a cross-sectional view showing a middle roller and an upper roller.
FIG. 6 is a perspective view showing an idler device for idler wheels.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combine (traveling work machine) 2 Traveling apparatus 2a Drive wheel 2b Idle wheel 3 Airframe frame 5 Crawler 6 Lower roller 6a Rolling surface 6b Rolling surface 7 Upper roller 30 Traveling frame 60 Front wheel 61 Rear wheel 62, 63 Medium wheel

Claims (2)

A crawler 5 is stretched between a drive wheel 2a and an idler wheel 2b provided before and after the traveling frame 3, and a plurality of lower rollers 6 are provided on the grounding side of the crawler 5. In the crawler type traveling device that is supported and guided by the rollers 7, the plurality of lower rollers 6 roll on both outer sides of the core metal projections 5 a of the crawler 5, and the plurality of lower rollers 6 Among them, the front rolling wheel 60 and the rear rolling wheel 61 arranged on the front and rear sides are made large in diameter, and a plurality of intermediate rolling wheels 62 and 63 grounded between both the rolling wheels 60 and 61 are made small in diameter, and the front wheel The traveling working machine is characterized in that the width of the outer rolling contact surface 6a of the wheel 60 and the rear rolling wheel 61 is wider than the width of the outer rolling contact surface 6b of the intermediate rolling wheels 62, 63. apparatus. The traveling device for a traveling working machine according to claim 1, wherein the upper roller is provided above the intermediate roller.

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