JP3509990B2 - Crawler traveling device - Google Patents

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 provided on a combine or the like.

[0002]

BACKGROUND OF THE INVENTION Generally,
In a crawler type traveling vehicle, the tipping angle improves as the left and right crawler spacing (tread) is widened.However, if the crawler spacing is restricted due to the cutting width, such as a combine, the required tipping angle is It was not easy to secure. Therefore, it has been proposed to pay attention to the rolling wheel that guides the inner surface of the ground contact portion of the crawler, and to extend the width of the rolling wheel to the outside to secure a necessary fall angle. However, if all the widths of the rolling wheels are extended outward, the cost will be significantly increased, and the first rolling wheel that receives the largest load among the rolling wheels (the rolling wheel at the front end). In the case of extending to the outside, there is a disadvantage that the load is further increased and large-scale reinforcement is required.

[0003]

SUMMARY OF THE INVENTION The present invention was created with the object of providing a crawler traveling device capable of solving these problems in view of the above-mentioned circumstances. The invention, the inner surface of the ground portion of the crawler,
In a crawler traveling device that guides with three or more rolling wheels arranged in the front-rear direction, among the rolling wheels, two or more rolling wheels are selected excluding the rolling wheel at the front end, and the width of the selected rolling wheels is selected. When extending to the outside, the rolling wheels extended to the outside are
When arranging in front of and behind the center of gravity of the body
In addition, the crawler traveling device is characterized in that the distribution balance thereof is set substantially even . According to a second aspect of the present invention, in a crawler traveling device for a combine, which guides an inner surface of a ground portion of the crawler with three or more rolling wheels arranged in the front-rear direction, among the crawler traveling devices provided on both the left and right sides of the combine, when the vehicle is idle. Targeting only the left crawler traveling device having a large load, and selecting two or more rolling wheels excluding the front end rolling wheel from among the rolling wheels provided in the crawler traveling device,
The crawler traveling device is characterized in that the width of the selected wheel is extended outward. With this configuration, the present invention extends the width of the rolling wheels outward, while avoiding a significant increase in cost and eliminating the need for large-scale reinforcement. .

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a combine traveling machine body, and the traveling machine body 1 includes a cutting section 2 connected to a front end of the machine body, a threshing selection section 3 provided on the left side of the machine body, and a grain tank provided on the right side of the machine body. 4, a straw treatment unit 5 provided at the rear of the machine body, a pair of left and right crawler traveling devices 6 provided at a predetermined interval on the bottom of the machine body, and the like. The load balance of the traveling machine body 1 Is set in advance so that the load on the left side is large when the vehicle is empty and the load on the right side is large when the grain is full, so it is possible to prevent the load balance from being largely biased to the right when the grain is fully loaded. ing.

The crawler traveling device 6 includes a drive sprocket 8 for driving and rotating an endless crawler 7 made of a rubber elastic material, an idler 9 for adjusting tension of the crawler 7, and a grounding portion of the crawler 7. It is configured to be suspended by wheel members such as a plurality of rolling wheels 10 that guide the inner surface, a movable rolling wheel 11 that moves up and down according to steps and irregularities, and an upper rolling wheel 12 that guides the inner surface of the anti-ground portion of the crawler 7. The above basic configurations are all conventional.

Reference numeral 13 denotes a cored bar embedded in the crawler 7 at a predetermined interval (suspending direction), and the cored bar 13
The pair of left and right convex portions 13a integrally formed with the crawler 7 are
It protrudes from the inner peripheral surface of and engages with the groove portion of the wheel 10, etc.,
The protruding position is offset outward with respect to the left-right center of the crawler 7, so that the outer width of the crawler 7 is "h" and the inner width is "i" with the left-right center of the protrusion 13a as a boundary. In this case, the inequality “h <i” is satisfied. That is, since only the guide position by the rolling wheels 10 is displaced outward without changing the outer width (l) of the left and right crawlers 7, a wide outer width (g) of the left and right rolling wheels 10 is secured and the traveling body 1 of the traveling machine body 1 is secured. The fall angle can be improved. Reference numeral 14 is a plurality of steel cords embedded in the lower vicinity of the core metal 13.

On the other hand, the plurality of rolling wheels 10 are the rolling wheel bosses 1.
It is formed in a so-called double flange type in which the inner ring 10b and the outer ring 10c are welded to 0a. Then, the core metal 1 is formed in the groove portion 10d formed between the inner ring 10b and the outer ring 10c.
3, the groove 10d of the rolling wheel 10 is offset inwardly with respect to the lateral center of the rolling wheel 10, and therefore the lateral center of the groove 10d serves as a boundary. When the outer width of 10 is “j” and the inner width is “k”, the inequality “j> k” is satisfied.
That is, without changing the outer width (l) of the left and right crawlers 7,
Since the outer end position of the rolling wheel 10 can be displaced outward, the outer width (g) of the left and right rolling wheels 10 expanded based on the offset of the metal core convex portion 13a is further widened, and as a result, The falling angle of the traveling body 1 can be further improved. In this embodiment, the outer ring 10
When the width of c is "j '" and the width of the inner ring 10b is "k'", the relational expression "j / j '= k / k'" is established.

By the way, since the driving force of the drive sprocket 8 is distributed substantially evenly inside and outside the crawler 7, as described above, the convex portion 13a of the cored bar 13 with respect to the lateral center of the crawler 7. When offset to the outer side, the driving force per unit width of the crawler 7 increases within the range of the outer width (h), and the surface pressure of the outer ring 10c accordingly increases, but the center of the rolling wheel 10 in the left-right direction is increased. Since the offset ratio "j / k" of the groove portion 10d with respect to the "c" is made substantially equal to the offset ratio "i / h" of the convex portion 13a with respect to the lateral center of the crawler 7, the inner surface of the crawler 7 has an inner ring 10b and an outer ring 10c.
It is possible to eliminate the inconvenience that the outer ring contact surface portion of the crawler 7 deteriorates at an early stage.

Further, in this embodiment, as described above, the roller 1
In order to secure the wide outer width (g) of the left and right rolling wheels 10 by offsetting the groove portion 10d of 0, the outer end position of the rolling wheel 10 is made to substantially coincide with the outer end position of the core metal 13, and therefore the convex When the outer width of the cored bar 13 is "m" with the left-right center of the portion 13a as a boundary, the relational expression "j≈m" is established. That is, the outer width (g) of the left and right wheels 10
Is as wide as possible within the range not exceeding the outer end position of the cored bar 13.

On the other hand, reference numeral 15 denotes a pair of left and right track frames which are integrally provided on the bottom of the traveling machine body 1 in the front-rear direction, and through a support shaft 16 projecting outward from the track frames 15. Although the plurality of rolling wheels 10 are assembled, among the plurality (four in this embodiment) of rolling wheels 10,
Excluding the front end (first rolling wheel), two or more (in this embodiment, the second rolling wheel and the third rolling wheel) are selected, and the outer ring width (r) is outwardly selected from the selected ones. The extended wide wheel 17 is extended, and therefore, when the outer width of the left and right wide roller 17 is set to "p", the inequality "g <p" is satisfied. That is, in order to extend the minimum number of the rolling wheels 10 to the outer side and to secure a necessary tipping angle, all the rolling wheels 10 are
The cost can be reduced as compared to the case where the first rolling wheel is extended outward, and since the first rolling wheel that receives the largest load among the rolling wheels 10 is excluded, the load acting on the first rolling wheel is eliminated. It is also possible to avoid increasing. 1
7a is a rolling boss of the wide rolling wheel 17, 17b is an inner ring, 17c
Is an outer ring, and 17d is a groove.

Further, the wide rolling wheels 17 are used for the traveling machine body 1.
The front and rear center of gravity positions (G) are distributed to the front and rear, and the distribution balance is set to be substantially equal. Therefore, the distance between the front and rear wide rolling wheels 17 with respect to the center of gravity position (G) is set to "e". , And “f”, the relational expression “e≈f” is established. That is, since the tilt load of the traveling vehicle body 1 can be substantially evenly received by the front and rear wide rolling wheels 17, it is possible to improve the falling angle and also to prevent an unbalanced load from acting on one of the wide rolling wheels 17. It is like this.

By the way, in this embodiment, the wide rolling wheels 17 are provided only on the left crawler traveling device 6 which has a large load when the vehicle is empty.
Has been adopted. That is, since entry and exit to a field where there is a possibility of falling is performed in an empty state, the wide rolling wheels 17 are adopted only in the left crawler traveling device 6 in consideration of the load balance when the vehicle is empty. , Right crawler device 6
It is possible to avoid unnecessary extension of the wheels 10 and reduce costs. Further, in a combine that normally works counterclockwise, since the left crawler traveling device 6 does not ride on the shore, it is possible to avoid the wide rolling wheels 17 riding on the shore and receiving a large load as much as possible. It is like this.

Further, in this embodiment, all the rolling wheels 10, 1 are
7 is supported using a common support shaft 16. That is, the strength of the support shaft 16 is set on the basis of the roller wheel that receives the largest load (in this embodiment, the load of the front end roller wheel 10 and the load of the wide roller wheel 17 are substantially equal), and this support shaft 16 is Regardless of the difference, it is used for all wheels 10 and 17,
In addition to reducing the production cost of the support shaft 16,
The inconvenience of wrongly assembling the support shafts 16 having different strengths can be eliminated.

Further, in the present embodiment, a predetermined gap (δ) is secured between the extending portion of the wide roller 17 (the portion protruding outward from the core metal 13) and the inner surface of the crawler 7. is doing. That is, the extending portion of the wide rolling wheel 17 acts only when the traveling machine body 1 is tilted, and in other states, the crawler 1 is extended.
Since the crawler 7 is not abutted against the crawler 7, damage to the crawler 7 can be prevented as much as possible, and the load acting on the support shaft 16 can be reduced.

Furthermore, in the present embodiment, the movable wheel 11 described above is arranged at an intermediate position between the front and rear wide wheels 17. That is, since the front and rear wide rollers 17 extend outward to protect the movable roller 11 (including the rotating arm 11a), the movable roller 11 contacts an obstacle or the rotating arm 1
Mud is prevented from being deposited on the turning fulcrum of 1a as much as possible, and the durability of the movable wheel 11 is improved.

In the embodiment of the present invention constructed as described above, a plurality of rolling wheels 10 are excluded except for the one at the front end.
In order to secure the necessary tipping angle by configuring the selected ones as wide rolling wheels 17 whose outer ring width (r) is extended outward, all the rolling wheels 10 are moved outward. The cost can be reduced as compared with the case of extending, and since the first rolling wheel that receives the largest load among the rolling wheels 10 is excluded, the load acting on the first rolling wheel is increased. Can also be avoided.

Moreover, since all of the wheels 10 and 17 are supported by using the common support shaft 16, the production cost of the support shaft 16 can be reduced and the support shafts 16 having different strengths are erroneously assembled. The inconvenience of attaching can be eliminated.

Further, the wide wheels 17 are attached to the traveling machine body 1.
Since the front-rear center of gravity position (G) is distributed to the front and the rear, and the distribution balance is set to be substantially equal, the tilting load of the traveling machine body 1 can be received by the front and rear wide rolling wheels 17 substantially uniformly. As a result, the fall angle can be further improved, and the disadvantage that an unbalanced load acts on one of the wide rolling wheels 17 can be avoided.

Further, in order to secure the necessary tipping angle by adopting the wide rolling wheels 17 only on the left crawler traveling device 6 which has a large load when the vehicle is empty, when the wide rolling wheels 17 are adopted on the left and right crawler devices 6. Compared with the above, the cost can be reduced, and since the combine usually travels counterclockwise, the wide rolling wheels 17 are placed on the shore as in the case where the wide rolling wheels 17 are adopted for the right crawler traveling device 6. There is no inconvenience when riding and receiving a large load.

Incidentally, the present invention is not limited to the above-mentioned embodiment, and as in the second embodiment shown in FIG. 6, the core metal 13 is provided up to the outer end position of the wide rolling wheel 17. It is also possible to extend, and in this case, in order to receive the tilting load of the airframe by the core metal 13 and the wide rolling wheels 17,
It can contribute to the improvement of the falling angle. Further, in the first embodiment, a predetermined gap (δ) is secured between the extended portion of the wide rolling wheel 17 and the inner surface of the crawler 7, but FIG.
As in the third embodiment shown in FIG. 2, the extended portion of the wide rolling wheel 17 may be expanded into a trumpet shape so as to be always in contact with the inner surface of the crawler 7, and in this case, Since the extending portion receives the body tilt load regardless of the amount of tilt, it is possible to improve the falling angle and also contribute to the improvement of the traveling property even in the normal running.

[0021]

In summary, since the present invention is constructed as described above, the width of the rolling wheels for guiding the inner surface of the grounding portion of the crawler is extended outward so as to secure the necessary fall angle. However, since the front end rolling wheel is excluded from the plurality of rolling wheels and two or more rolling wheels are selected and the width of the selected rolling wheel is extended outward, the minimum number of rolling wheels is extended. The necessary fall angle can be secured simply by doing. Therefore, the cost can be reduced compared to the case where all the rolling wheels are extended outward, and the front rolling wheels that receive the largest load among the rolling wheels are excluded. There is no inconvenience of further increasing the load acting on the rolling wheels, and as a result, large-scale reinforcement can be unnecessary.

[0022]

Further, in arranging the rolling wheels extended outward, in front of and behind the center of gravity of the machine body,
When the distribution balance is set to be substantially equal, the rolling wheels extending outward receive the tilting load of the machine body substantially evenly, so that the fall angle can be improved.

[0024]

Further, only the left crawler traveling device having a large load when the vehicle is empty is selected, and among the rolling wheels provided in the crawler traveling device, two or more rolling wheels are selected excluding the front end rolling wheel, When the width of the selected rolling wheel is extended outward, it is possible to avoid unnecessary extension of the rolling wheel of the right crawler device to reduce the cost, and normally work in the counterclockwise direction. In the combine, the left crawler traveling device does not ride on the shore, so that it is possible to prevent the rolling wheels extending outwards from riding on the shore and receiving a large load.

[Brief description of drawings]

FIG. 1 is a side view of a combine.

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

FIG. 3 is a cross-sectional view of the left and right crawler traveling devices.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a sectional view taken along line BB in FIG.

FIG. 6 is a cross-sectional view of essential parts showing a second embodiment.

FIG. 7 is a cross-sectional view of essential parts showing a third embodiment.

[Explanation of symbols]

1 traveling aircraft 6 Crawler traveling device 7 crawlers 10 wheels 13 core 17 Wide wheels

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-8683 (JP, A) JP-A-6-72358 (JP, A) Actual opening 2-143284 (JP, U) Actual opening 3- 85285 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62D 55/14

Claims (2)

(57) [Claims] 1. A crawler traveling device that guides an inner surface of a ground portion of a crawler with three or more rolling wheels lined up in the front-rear direction. To extend the width of the selected rolling wheel outward .
The front and rear weights of the fuselage.
When allocating to the front and rear with respect to the heart position,
A crawler traveling device characterized in that the dividing balance is set to be substantially equal . 2. A crawler traveling device for a combine, which guides an inner surface of a ground portion of a crawler with three or more rolling wheels arranged in the front-rear direction, wherein a load of an empty vehicle among the crawler traveling devices provided on both left and right sides of the combine. Targeting only the left-side crawler traveling device, the two or more rolling wheels are selected from among the rolling wheels provided in the crawler traveling device, excluding the front end rolling wheel, and the width of the selected rolling wheel is set to the outside. A crawler traveling device characterized in that the crawler is extended to one side.