JPH0345908Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ground contact position adjustment device for a crawler-type traveling body in a working traveling body such as a combine harvester.

[Problems to be solved by the prior art and the invention]

Conventionally, in the case of a combine harvester, for example, in a work traveling machine equipped with a crawler-type traveling body, when reaping work in a soft field such as a wet field, the traveling body on the mown field side moves forward as shown in Fig. 11. If it gets stuck in a low place such as a crawler mark during the reaping process and becomes tilted, the pre-processing section that reaps the stem culm will also tilt, causing the reaping section to come off the cutting row and leave uncut material, significantly reducing work efficiency. In addition to this, the machine's center of gravity shifts toward the slope, causing the machine to constantly move toward the slope, causing the driver to constantly turn the steering lever toward the unmoved ground. Moreover, it was often difficult to escape from the crawler tracks of the traveling body that had become stuck.

Therefore, conventionally, a support frame protruding from the aircraft body toward the crawler type traveling body side, a traveling body frame arranged inside the winding of the crawler band, and each of these frames are pivotally connected to each other so as to be able to freely swing. It has a link body and an actuation cylinder interposed between the link body and the fuselage at a position outside the winding of the crawler band, and the swinging motion of the link body based on the expansion and contraction of the actuation cylinder causes the crawler type to be For example, Japanese Patent Application Laid-open No. 163375/1983 discloses a device configured to adjust the vertical position of a traveling body with respect to the body so as to maintain a tilted body horizontally.

However, in this type of vehicle, a bending moment acts on the link body that receives the ground load of the crawler type traveling body, but this bending moment changes the connection position between the support frame and the traveling body frame by the link body, and The closer it is to the body frame, the smaller it can be. However, in the above-mentioned conventional device, since the intermediate portion of the link body whose both ends are pivotally connected to the support frame and the traveling body frame, respectively, is pivotally connected to the actuating cylinder, the link body is inevitably separated from the traveling body frame by the crawler band. At the outside of the winding position, the support frame and the traveling body frame are connected and constantly receive a large bending moment, and as a result, there is a risk that the link body may be deformed or damaged, and the operating cylinder connected to the link body There is also a risk of receiving a large moment,
There is a problem in that it is necessary to use a large and reinforced link body or operating cylinder that can withstand this.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a ground contact position adjustment device for a crawler-type traveling body in a work-use traveling body that can eliminate these drawbacks. A support frame provided on the aircraft body side to support the body, a traveling body frame disposed inside the crawler band wound around the crawler type traveling body, and the support frame and the traveling body frame, respectively. It has a link body that is pivotally connected to be able to swing freely, and an actuation cylinder that is interposed between the link body and the fuselage at a position outside the winding of the crawler band, and the link body swings based on the expansion and contraction of the actuation cylinder. In a work traveling vehicle configured to adjust the vertical position of the traveling body frame with respect to the vehicle body by movement, the support frame is inserted from the vehicle body side to the inside of the crawler band winding, while the link body is inserted into the crawler band winding from the vehicle body side. A first arm facing in the vertical direction is pivotally connected at a position outside the crawler band winding to an operating cylinder arranged facing in the front-rear direction in the section, and a front and rear arm is pivotally connected to the traveling body frame at a position inside the crawler band winding. A second arm facing the direction is connected to the base end of the first arm at the position outside the crawler band winding, and to the base end of the second arm at the position inside the winding, and to the support frame at the position inside the crawler band winding. and a rotatably supported pivot part, and the traveling body frame whose vertical position is adjusted is supported by a part of the support frame located inside the crawler band winding. It is.

With this configuration, the landing position of the crawler band relative to the aircraft body can be adjusted up and down by expanding and contracting the actuating cylinder, while preventing deformation and damage of the link body and the actuating cylinder, and providing special reinforcement. It is possible to greatly simplify the structure by using a small and lightweight one without using a large link body or actuating cylinder.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings. In the drawing, 1 is a traveling body of a combine harvester, and the traveling body 1 is composed of parts and devices such as a pre-processing section 2, a threshing section 3, a grain storage section 4, an after-processing section 5, and a driver's seat 6. Everything that has been done is the same as before.

Reference numerals 7 and 8 denote crawler-type traveling bodies on the mowed field side and uncut field side, respectively, and the driving sprockets 9 and 9a of both the traveling bodies 7 and 8 are connected to the transmission case 10.
are connected to left and right drive shafts 11 and 11a, and are driven separately by power from an engine (not shown).
The axle case 12 of the mowed field side traveling body 7 has a bearing 13 on the axle holder 14 side fixed to the transmission case 10.
The axle case 15 of the uncut land side traveling body 8 is rotatably supported via a bolt 15.
It is integrally fixed to the axle holder 14 side via a.

On the other hand, reference numerals 16 and 17 are support arms that are vertically installed on both the front and rear sides of the body frame 1a of the traveling body 1, and the lower ends of the support arms 16 and 17 are provided with pillars (support frames) so as to protrude in the left and right lateral directions. )18,1
9 are integrally supported, and cylindrical link boss shafts 20b, 21b are supported at the ends of these pillars 18, 19 so as to be rotatable around the axis. . The above link boss shafts 20b, 21
The outer end of the fuselage b is disposed so as to be recessed further outward than the inner edge of the crawler band 7a, that is, into the inner side around which the crawler band 7a is wound. 2 arms) 2
0 and 21 are each integrally provided in a protruding manner. Boss portions (pivotal portions) 20a, 21a formed at the tips of the swing links 20, 21 are rotated by bracket shafts 22, 23, respectively, fixed to a running frame 25 for supporting wheels that receives the ground load of the crawler band. A bracket shaft 22, which is movably fitted and pivotally supported by the front swing link 20, is connected to the axle case 12 on the cut field side via an arm 24. On the other hand, the rear bracket shaft 23 is attached to the arm 24.
a to the rear end of the traveling frame 25, whereby the mowed field side traveling body 7 uses the pillars 18 and 19 as pivot shafts, and the arm 2.
4 and 24a are attached to the traveling body 1 side by a parallel link mechanism serving as a link rod, and can be vertically displaced parallel to the front downward direction with respect to the uncut land side traveling body 8. .

Further, 26 is an operating cylinder whose base end is pivotally connected to the fuselage frame 1a, and the operating cylinder 26
is arranged in a substantially horizontal manner in the front-rear direction so as to be inside the aircraft body than the crawler band 7a and along the inner edge of the upper half of the crawler band 7a, and at its tip,
A distal end portion of an operating link (first arm) 27a is connected to the inner edge of the front link boss shaft 20b so as to be located on the inner side of the body than the crawler band 7a. When the operating cylinder 26 is contracted, the mowed field side traveling body 7 is located at the same height as the uncut land side traveling body 8, but when the operating lever 28 is operated, the pressure from the hydraulic pump 29 is increased. By pressurizing the oil into the working cylinder 26 and expanding it,
The mowed field side traveling body 7 is configured to move relative to the uncut land side traveling body 8 toward the front and downward, thereby adjusting the ground contact position with respect to the machine body. In addition, in the figure,
30 is a switching valve that is switched by operating the operating lever 28.

In the embodiment of the present invention configured as described above, as the traveling machine body 1 travels, the stem culms cut in the pre-processing section 2 are threshed in the threshing section 3, and then processed as appropriate in the post-processing section 5. It will be processed and discharged outside the machine, but when cutting the stem culms like this, the mowed field side traveling body 7 gets stuck in the crawler tracks created during the previous reaping process, causing the machine to tilt. Sometimes it happens. In this case, in the present invention, by operating the operating lever 28 and extending the actuation cylinder 26, the mowed land side traveling body 7 is directed downward and forward with respect to the uncut land side traveling body 8. It is possible to move relatively and maintain the main body 1 in a substantially horizontal position.

That is, when the mowed field side traveling body 7 gets stuck in the crawler tracks of the previous stroke, the traveling body 1 enters an unstable running state in which the mowed field side is sloped low. In such a case, when the operating lever 28 is operated to extend the operating cylinder 26, the operating link 27a is pushed forward and the swinging link 20 is forced to swing around the pillar 18, resulting in crawler marks. The mowed field side traveling body 7 that has been stuck in the front and rear pillars 18, 1
The moving body 1 is moved forward and downward relative to the uncut field side traveling body 8 using the link shaft 9, and the inclination of the traveling body 1 is eliminated. By returning the operating lever 28 to the neutral position when the traveling body 1 is in a substantially horizontal position, the traveling body 1 can be moved even if the mowed field side traveling body 7 is stuck in the crawler tracks. It is maintained in a substantially horizontal position, and reaping work can be performed in a stable working position.

In this way, in the present invention, the mowed land side traveling body 7
If the machine is tilted to the left or right due to getting stuck in the crawler tracks from the previous work process, the moving body 7 on the mowed land side
By vertically adjusting the displacement of the machine body relative to the unmoved field side traveling body 8, the machine body can be corrected to a substantially horizontal posture. 20 and 21 are located inside where the crawler band 7a is wound, and are arranged as close as possible to the running frame 25 that receives the ground load. As a result, although the actuating cylinder 26 is disposed inward of the crawler band 7a, the bracket shafts 22 and 23 are lengthened inward to move the swing links 20 and 21 closer to the inner edge of the crawler band 7a. This prevents a large moment from acting on the swinging links 20 and 21 in the direction of bending them inward, unlike when the swinging links 20 and 21 are provided inside the fuselage and placed far apart from the traveling frame 25 in the left-right direction. The dynamic links 20 and 21 are
Deformation and breakage are prevented, and it is advantageous in terms of strength and can be made lightweight.

Moreover, the load on the actuating cylinder 26 connected to the swing link 20 can be reduced.
The operating cylinder 26 can also be made smaller and lighter.

Further, the actuation cylinder 26 converts the expansion and contraction movement in the front and back direction into rotational movement by the link mechanism of the swing link 20 and the actuation link body 27a, which are integrally connected to each other, using the link boss shaft 20b as a fulcrum. Since the traveling body 7 is raised and lowered by the lever, the lever can be used effectively, the load on the operating cylinder 26 can be reduced, and a small hydraulic cylinder can be used.

Furthermore, an operating link 27a that projects upwardly and downwardly from the boss shaft 26b, and a boss shaft 20b.
A swing link 20 protruding from the front and back direction.
This forms a link mechanism that is approximately L-shaped in side view, and the actuating cylinder 26 connected to the actuating link 27a is disposed facing the front-rear direction. Therefore, the actuating cylinder 26 is disposed facing the vertical direction. The arrangement space can be secured significantly more easily than in the case where the cylinder 26 is operated by a cylinder 26, and the operating load of the cylinder 26 can be reduced by ensuring a large expansion and contraction stroke of the cylinder 26.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the point is that it is sufficient that one traveling body can be moved downward relative to the other traveling body. In addition, the vertical movement of one of the traveling bodies is not done manually using a control lever, but the vertical movement of the traveling body on the mowed land side is automatically performed by horizontal detection by an attitude detection sensor installed in the machine body. It is okay to do so.

[Effect]

In summary, since the present invention is constructed as described above, when one of the traveling bodies gets stuck in the crawler traces of the previous work process and the traveling body is tilted, the grounding position of the traveling body with respect to the body can be adjusted. Although it is possible to maintain the aircraft in a substantially horizontal position by adjusting the vertical position, the traveling body frame whose vertical position is adjusted must be supported by a part located inside the crawler band winding of the support frame. become. Therefore, the traveling body is not supported at a position outside the crawler band winding which is spaced from the traveling body frame as in the conventional case, but is supported at a position very close to the traveling body frame.
The bending moment acting on the link body based on the ground load acting on the traveling body frame can be made as small as possible. As a result, it is possible to reliably prevent deformation and damage of the link body and the actuating cylinder, and it is possible to greatly simplify the structure by using a small and lightweight one without using a large, specially reinforced link body or actuating cylinder. It can be measured.

Moreover, since the extension and contraction of the operating cylinder is converted into rotational motion by the link body having the first and second arms to raise and lower the traveling body frame, the lengths of the first and second arms are The settings allow effective use of leverage, reducing the load on the operating cylinder, and making it possible to use a small and lightweight operating cylinder.

Furthermore, the link body is formed into a bent shape in side view with a first arm facing in the vertical direction and a second arm facing in the front-rear direction, so that the actuating cylinder can be disposed in the front-rear direction. It is much easier to secure the installation space than those that are installed vertically, and it is also possible to ensure a large expansion and contraction stroke of the operating cylinder, reducing the operating load on the operating cylinder. .

[Brief explanation of the drawing]

The drawings show an embodiment of the ground contact position adjustment device for a crawler-type traveling body in a working traveling body according to the present invention, in which Figure 1 is a perspective view of a combine harvester, and Figure 2 is a schematic diagram of a power transmission mechanism. 3 is a plan view of essential parts of the crawler-type traveling body, FIG. 4 is a side view of the crawler-type traveling body in a normal state, FIG. 5 is a side view of the crawler-type traveling body in a descending state, and FIG. 6 A,
B and C are layout diagrams of the left and right crawler-type traveling bodies as seen from the plane, side, and front in a normal state. Figure 7 A, B, and C are layout diagrams of the left and right crawler-type traveling bodies in a descending state as viewed from the plane, side, and front. Layout diagram as seen, No. 8
The figure is a hydraulic system diagram, Figure 9 is a side view of the operating lever,
FIG. 10 is an explanatory diagram of the operation, and FIG. 11 is an explanatory diagram of the operation of a conventional example. In the figure, 1 is the traveling body, 7 is the mowed field side traveling body, 7
8 is a crawler band, 8 is an uncut land side traveling body, 20 is a swing link, 20b is a link boss shaft, 25 is a traveling frame, 26 is an operating cylinder, and 27a is an operating link.

Claims (1)

[Scope of utility model registration request] A support frame provided on the aircraft body side to support the crawler type traveling body, a traveling body frame arranged inside the winding of the crawler band wound around the crawler type traveling body, and the support frame and the traveling body frame. It has a link body pivotally connected to each other so as to be able to swing freely, and an actuation cylinder interposed between the link body and the body at a position outside the winding of the crawler band, and a linkage based on the expansion and contraction of the actuation cylinder. In a working traveling machine configured to adjust the vertical position of the traveling body frame with respect to the machine body by swinging motion of the body, the support frame is inserted from the machine body side to the inside of the crawler band winding, while the link body is inserted. , a first arm facing in the vertical direction that is pivotally connected at a position outside the crawler band winding to an operating cylinder arranged on the side of the aircraft facing in the front-rear direction; A second arm facing in the front-rear direction, connected to the base end of the first arm at the outer position of the crawler band winding, and to the base end of the second arm at the inner position of the crawler band winding to the support frame, and a pivot support rotatably supported within the rotation, and the traveling body frame whose vertical position is adjusted is supported by a portion of the support frame located on the inside of the crawler band winding. A grounding position adjustment device for a crawler-type traveling body in a working traveling body.