JP2001001959A - Crawler running gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the mud splashing capability of a crawler whose grounded inner surface is guided by freely rotatable track rollers, by forming the track rollers outward extensionally beyond the outer end position of the core metal. SOLUTION: A plurality of core metals 14 are buried in a crawler 8 of a crawler running gear in a combine back and forth at prescribed spaces. The core metals 14 are formed so that a pair of right and left protrusions 14b may be integrally protruded at a buried part 14a buried in the crawler 8, and the protrusions 14b are engaged with a groove in the track roller 11 to regulate dislocation in the right/left direction of the crawler 8. The roller 11 is formed into a double flange type so that a roller boss 11a rotatably supported by a roller spindle 15, a cylindrical inner ring 11b extending from the inner end of the roller boss 11a toward the inside of the body, and a cylindrical outer ring 11c extending from the outer end of the roller boss 11a toward the outside of the body may be integrally formed, and an outer ring 11c is formed so that its outer end part may extend outward by a prescribed dimension A from the outer end position of the core metal 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a crawler traveling device provided in a combine or the like.

[0002]

2. Description of the Related Art In general, a crawler traveling apparatus of this kind suspends a crawler having a core metal embedded between a driving wheel and an idler wheel, and is capable of rolling on the inner surface of a ground contact portion of the crawler. It is configured to provide guidance. However, if the outer end of the crawler has insufficient rigidity, the ground pressure of the crawler is reduced due to the bending deformation of the outer end of the crawler. There is an inconvenience that the property decreases.

[0003]

Therefore, it has been proposed to increase the rigidity of the outer end of the crawler by forming a reinforcing rib on the upper surface of the outer end of the crawler. However, in this case, the weight of the crawler increases. It was not forgiven, and there was an inconvenience that the mud-peeling property of the crawler was reduced as the shape became complicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above situation, and a core metal is provided between a drive wheel and an idler wheel. In a crawler running device for suspending a buried crawler and guiding the inner surface of a ground contact portion of the crawler with a rotatable rolling wheel, the rolling wheel is formed to extend outward beyond an outer end position of a cored bar. It is characterized by having done. That is,
Even without forming a reinforcing rib on the upper surface of the crawler outer end, bending deformation of the outer end of the crawler can be prevented as much as possible and the necessary ground pressure can be secured. Not only can we reduce the weight of the crawler, we can also improve the crawler's ability to remove mud by simplifying its shape.
As the rolling wheels are extended outward, it can also contribute to an improvement in the body overturning angle.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing unit 3 for threshing and sorting of cut stems and culms, and grains for storing sorted kernels. It comprises a tank 4, a post-processing unit 5 for discharging threshed culms, an operating unit 6 provided with a driver's seat and various operating tools, a pair of left and right crawler traveling devices 7, and the like. Are as before.

The crawler traveling device 7 comprises a drive sprocket (drive wheel) 9 which is driven by an engine power to rotate a crawler 8 formed endlessly of a rubbery elastic material.
(Idle) 10, crawler 8 for adjusting tension
A plurality of rolling wheels 11 for guiding the inner surface of the ground contact portion, a movable rolling wheel 12 that moves up and down in accordance with steps or unevenness, and an upper rolling wheel 13 for guiding the inner surface of the crawler 8 opposite the ground contact portion, and the like. Have been. In addition, 8a is a lug protrudingly formed on the outer peripheral surface of the crawler 8, and H is a lug height.

A plurality of cores 14 are buried in the crawler 8 at predetermined intervals in the front-rear direction.
A buried portion 14a that is buried in the crawler 8 in the left-right direction.
A pair of left and right convex portions 14 protruding from the inner surface of the crawler 8.
b is integrally formed so as to protrude, and the convex portion 14b protruding from the inner surface of the crawler 8 is engaged with the groove of the rolling wheel 11 to regulate the lateral displacement of the crawler 8 in the left-right direction. I have.

The wheel 11 has a wheel boss 11a rotatably supported by a wheel support shaft 15, and a cylindrical inner ring 11b extending inward from the inner end of the wheel boss 11a. A groove formed between the inner ring 11b and the outer ring 11c, the double flange being formed integrally with a cylindrical outer ring 11c extending outward from the outer end of the body from the outer end of the rolling wheel boss 11a. Rolling on the inner surface of the ground portion of the crawler 8 while guiding the convex portion 14b of the metal core 14 by 11d.

The outer race 11c is formed wider than the inner race 11b, and the outer end thereof extends outward by a predetermined dimension A from the outer end position of the cored bar 14. That is,
The outer end of the outer ring 11c extended outwardly suppresses the bending deformation of the crawler 8 due to the upward bending stress applied to the outer end of the crawler 8 when the outer end of the crawler 8 is subjected to the upward bending stress. In order to prevent this, the crawler 8 can be prevented from sinking into the soil as much as possible on a soft land such as a wetland, so that wetland traveling performance can be improved. As a result, the crawler 8 is formed on the inner surface of the outer end portion of the crawler 8. It is not permissible to reduce the weight of the crawler 8 by eliminating the need for the reinforcing ribs, and it is possible to simplify the shape and improve the mud-removing property of the crawler 8, and to extend the outer ring 11c outward. As a result, it is possible to contribute to the improvement of the body overturning angle. In the present embodiment, a predetermined gap is secured between the outer peripheral surface of the outer end of the outer race 11c and the inner peripheral surface of the outer end of the crawler 8, so that the outer peripheral surface of the outer end of the outer race 11c is always crawled. As compared with the case of contacting the inner surface of the outer end of the crawler 8, the damage to the crawler 8 is not allowed, and the load acting on the roller support shaft 15 can be reduced as much as possible. I have.

The wheel boss 11a is formed in a cylindrical shape with a bottom opening to the inside, and its inner peripheral portion is
An end of the wheel support shaft 15 projecting outward from the track frame 16 is rotatably supported via a bearing 17 and is filled with oil 18 for lubricating the bearing 17. In other words, while the inner opening of the wheel boss 11a is hermetically covered with the cover 20 via the sealing member 19, the oil inlet 11e which is always closed by the injection plug 21 is provided at the center of the bottom of the wheel boss 11a. Is formed, and the oil 18 is injected from the oil injection port 11e into the wheel boss 11a.

Further, 11f is the oil inlet 11e.
The oil inspection port 11f is normally closed by an inspection plug 22. However, as shown in FIG. In the oil injection work at the time of production performed by setting the oil inspection port 11f, the oil inspection port 11f functions as an air vent hole, so that the oil injection work can be facilitated and the productivity can be improved. Further, in the wheel mounted state, the oil inspection port 11f is not allowed to function as an oil extraction hole as shown in FIG. 4, but also functions as an oil injection hole as shown in FIG. Replacement becomes possible, and as a result, it is not necessary to attach / detach the wheel assembly 23 at the time of oil replacement, thereby improving maintainability.

In the apparatus constructed as described above, the crawler 8 having the core metal 14 embedded therein is suspended between the driving sprocket 9 and the idler 10, and the inner surface of the grounding portion of the crawler 8 can roll freely. The outer ring 11c of the wheel 11 is extended outward beyond the outer end position of the cored bar 14, so that the crawler 8 is guided.
The crawler 8 can be formed without forming a reinforcing rib on the outer end upper surface of the crawler.
The necessary ground pressure can be ensured by preventing the bending deformation of the outer end as much as possible. As a result, the crawler 8 cannot be reduced in weight as compared with the one in which the reinforcing ribs are formed. As a result, the mud-dispersing property of the crawler 8 can be improved, and further, as the rolling wheels 11 are extended outward, it can also contribute to the improvement of the machine body overturning angle.

Further, since the lug 8a can be made higher by the weight of the reinforcing rib, it is possible to improve wetland running performance while avoiding an increase in the weight of the crawler 8.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a cross-sectional view of a wheel and a crawler.

FIG. 3 is an explanatory diagram showing oil injection during production.

FIG. 4 is an explanatory diagram showing extraction of oil during mounting.

FIG. 5 is an explanatory diagram showing oil injection during mounting.

FIG. 6 is a cross-sectional view of a rolling wheel and a crawler showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combine 7 Crawler travel device 8 Crawler 9 Drive sprocket 10 Idler 11 Roller wheel 11a Roller wheel boss 11b Inner ring 11c Outer ring 14 Core metal 15 Rolling spindle

Claims (1)

[Claims] 1. A crawler traveling device for suspending a crawler having a core metal embedded between a driving wheel and an idler wheel, and guiding an inner surface of a ground contact portion of the crawler by a rolling wheel capable of rolling. A crawler traveling device, wherein the rolling wheel is formed to extend outward beyond the outer end position of the cored bar.