JPH11217090A - Crawler travel gear of mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively perform disassembly and reassembly while preventing a screw from damaging and loosening by restraining the influence of mud and miscellaneous things to screws to mount a mounting bracket pivotally supporting a free rotating wheel as much as possible. SOLUTION: A mounting bracket 19 pivotally supporting free rotating wheels 18 is detachably installed to the lower face 14a of a truck frame 14 through the screw 23 advancing upward from a part beneath the lower face 14a, and a guide body 20 restricting an elastic body crawler 17 from coming off is extended in the crawler winding direction at a position directly below the head of the screw 23.

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 such as a combine and the like, and more particularly, to a free wheel for assisting the traveling of an elastic crawler wound between the front and rear ends of a track frame and a guide for regulating unwinding. It is about wearing the body.

[0002]

2. Description of the Related Art Conventionally, a crawler traveling device that forms a traveling section such as a combine harvester provided with a harvesting and transporting section in front of a body, a threshing section behind the section, and a sorting section below the threshing section is shown in FIG.
As shown in (a), an elastic crawler d is wound between a driving wheel b and an idle wheel c which are supported at the front and rear ends of a track frame a, and a track frame located between the wheels b and c. equipped with a plurality of idler wheels e, e,.
Rolling wheels f and g are respectively disposed above and below a substantially central region of the winding of the elastic crawler d, and a guide body h along the winding direction of the elastic crawler d is arranged before and after the idler wheels e, e. The elastic body crawler d is maintained in an appropriate tension state by a telescopic support mechanism X interposed between the track frame a and the idler wheel c.

However, in the crawler traveling device having the above-described configuration, as shown in FIG. 1B, the support j of the idle wheel e between the side surfaces i of the track frame a.
The idler wheel e is fixed to the track frame a by tightening the support bolt m that is screwed in from the horizontal direction by inserting the boss k projecting from the lower side into the track frame a. It is necessary to increase the separation distance between the head of the support bolt m protruding from i and the inner surfaces n, n of the idler wheels e facing the head, so that dirt, straw debris, and other foreign matters are interposed between the surfaces. As shown in FIG. 3 (c), it is easy to penetrate and not only cause damage to the head of the support bolt m and poor tightening, but also to insert and remove the support bolt m from the horizontal direction.
A plurality of bolt holes q, q,... Corresponding to the positions where the support bolts m are inserted must be formed in the circumferential direction on the rim surface p of the idler wheel e. In this case, the supporter j of the heavy idler wheel e is fitted between the two side surfaces i of the track frame a to rotate the idler wheel e while matching the position of the insertion hole of the support bolt m. In addition, the mounting and fixing of the support bolt m cannot be performed unless the positioning of the bolt holes q provided on the rim surface p is also performed at the same time, which imposes a heavy burden on the operator in the attaching and detaching work.

A guide body h extending over the front and rear regions of the idler wheels e, e ... along the winding direction of the elastic crawler d.
Also, one side i of the track frame a via the mounting surface r
., The heavy guide body h must be lifted up while adjusting the hole positions of the bolts s, s, and the work of attaching and detaching the idler wheels e, e. It required the same advanced technology.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in the course of research and development in pursuit of improvement of disassembly and assemblability around a track frame including mounting of an elastic crawler in view of the above situation. The purpose of the present invention is to minimize the influence of mud, foreign objects, and the like on the mounting screws of the mounting bracket that supports the idler wheels when the idler wheels are mounted on the truck frame. This eliminates the troublesome work of adjusting the positional relationship between the track frame and the idler wheel and screwing in the mounting screws while preventing the damage and tightening looseness, and efficiently disassembling and assembling. A crawler for a mobile agricultural machine that can perform the work of inserting a heavy guide body, and can easily perform the work of inserting a spindle required for mounting the work body, thereby improving the work efficiency. It also seeks to provide a line equipment.

[0006]

In order to solve the problem, a first technical means adopted by the present invention is to wind an elastic crawler between a driving wheel and an idler wheel which are supported at the front and rear ends of a track frame. In a crawler traveling apparatus for a mobile agricultural machine, comprising a plurality of idler wheels mounted on a track frame between the wheels, a mounting bracket for supporting the idler wheels is provided on a lower surface of the track frame from above the lower surface. A guide body that is detachably mounted via a screw that enters the crawler and that restricts the winding of the elastic crawler from being unwound is located just below the head of the screw and extends in the winding direction of the crawler. As a second technical means, a downward U-shaped guide bracket for fixing a positioning portion formed on the upper surface of the guide body via a support shaft is fixed to the lower surface of the track frame, In mounting the guide, the upper surface of the positioning portion is brought into contact with the bottom in the guide bracket, and the insertion holes of the support shafts provided on both sides are configured to match. It is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail with reference to an embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a combine, and the combine 1 includes a pre-processing unit 6 including a grain stem combing body 4, a weeding body 5, etc., at a front portion of an airframe 3 provided with a crawler traveling device 2. A driver's seat 8 provided with a driving operation unit 7 at the front and side portions is disposed at the rear thereof, and a Glen tank 9 is provided at one side of the rear of the driver's seat 8. A threshing unit 10 is disposed so as to be horizontally rotatable, and on the other side of the Glen tank 9. A vertical transport pipe 11 containing a vertical feed spiral (not shown) is provided upright behind the Glen tank 9, and the paddy subjected to threshing and sorting in the threshing unit 10 is lifted and transported and stored in the Glen tank 9. After that, Glen tank 9
The combine 1 is configured to discharge from the horizontal feed spiral disposed at the bottom of the machine through the vertical feed spiral of the vertical transport pipe 11, and then to the outside of the machine from the discharge port 12 a of the discharge auger 12.

As shown in FIGS. 2 to 4, the crawler traveling device 2 has an idler wheel 16 mounted on a rear end of a track frame 14 supporting a drive wheel 13 at a front end thereof through a telescopic support mechanism 15. An elastic crawler 17 is wound between the drive wheel 13 and the idler wheel 16, and a plurality of idler wheels 18, 1
8 are mounted via mounting brackets 19, respectively, and a guide body 20 for restricting the elastic crawler 17 from being unwound is located just below the center of the mounting bracket 19 and extends in the winding direction. Has been established. Reference numerals 21 and 22 denote rolling wheels disposed above and below a substantially central area around which the elastic crawler 17 is wound.

Are supported by a mounting bracket 19 bent in an upward U-shape along the outer shape of the track frame 14. A plurality of mounting brackets 19 are detachably mounted on the track frame 14 between the driving wheel 13 and the idler wheel 16 at predetermined intervals by a bolt 23 and a nut 24 which enter from below to above. ing.

The guide body 20 includes a sled-shaped main body 20a interposed in a guide groove 25 extending at the center of the inner surface of the elastic crawler 17, a support portion 20b projecting from the upper surface thereof,
20b and the idler wheels 18, 18
A downwardly facing U-shaped guide bracket 26 is fixed to the lower surface 14a of the track frame 14 before and after the mounting position of...
As shown in FIG. 3, the positioning portions 20c projecting from the upper surfaces of the support portions 20b, 20b are respectively attached to the guide bracket 2
6, the both sides 26 b, 26 b of the guide bracket 26 and the support 2
In a state where the insertion holes 27 and 28 provided in the mounting bracket 19 are aligned with each other, the insertion bolt 29 and the nut 30 forming the support shaft are fastened, so that the guide body 20 is located immediately below the bolt 23 of the mounting bracket 19. Are extended along the winding direction.

Since the present invention is configured as described above,
When attaching the idler wheels 18, 18,... To the track frame 14, a mounting bracket 19 for supporting the idler wheels 18, 18 is fitted to the lower surface 14a of the track frame 14, and bolts 23 which are inserted upward from below are attached. By fastening with the nut 24, the idler wheels 18, 18,... Can be easily attached.

Then, as described above, the track frame 14
.. Attached to the track frame 14 do not project from the track frame 14 in the horizontal direction as in the prior art, so that the idler wheel 18 faces the track frame 14.
It is not necessary to take a large separation distance from the inner surface of the surface, and it is possible to suppress the intrusion of mud, straw waste, etc. between the surfaces, and even when such a foreign matter enters, the separation becomes easy and Since the head of the bolt 23 is located directly below the track frame 14 and the guide body 20 is provided immediately below the mounting position of the bolt 23, the bolt 23 may be directly affected by the above-mentioned foreign matter. In addition, damage to the head of the bolt 23 and improper tightening can be prevented.

On the other hand, the guide body 20 is connected to the track frame 14.
When mounting on the side surface 2 of the guide bracket 26 previously fixed to the lower surface 14a of the track frame 14,
6b, 26b, the supporting portion 20b protruding from the guide body 20 is fitted, and the positioning portion 20c on the upper surface is brought into contact with the bottom portion 26a in the guide bracket 26. If the insertion hole 28 provided in the support portion 20b of the guide body 20 easily matches only by adjusting the fine movement in the horizontal direction, the nut 30 is fastened by passing the insertion bolt 29 through each of the insertion holes 27, 28 in this state. The heavy guide body 20 can be easily attached. Therefore, disassembly and assembly around the track frame 14 including mounting of the elastic crawlers 17 can be easily performed without requiring any special technique, and the burden on the operator can be greatly reduced.

[0014]

In summary, the present invention is directed to a track frame in which an elastic crawler is wound between a drive wheel and a free wheel supported at the front and rear ends of a track frame, and a plurality of free wheels are mounted on the track frame between the wheels. In a crawler traveling device of a mobile agricultural machine equipped with a mounting bracket for supporting the idler wheel,
Attached detachably to the lower surface of the track frame via a screw that enters upward from below, and a guide body that regulates unwinding of the elastic crawler is positioned immediately below the head of the screw. Since the idler wheel extends in the winding direction of the crawler, when mounting the idler wheel on the track frame, the mounting screw of the mounting bracket that supports the idler wheel is protected by a guide body extending directly below the mounting bracket. It is possible to prevent the attachment screw from being damaged and loosened by minimizing the effects of mud and foreign matter adhering to the truck frame during the running of the aircraft, and also to remove and attach the idler wheel.
The mounting screw does not protrude to the idler wheel side, and the cumbersome work of screwing the mounting screw by adjusting the positional relationship between the track frame and the idler wheel is not required. The disassembly and assembly around the track frame including the attachment of the elastic crawler can be performed efficiently.
On the lower surface of the track frame, a downward U-shaped guide bracket for fixing a positioning portion projecting from the upper surface of the guide body via a support shaft is fixed, and when attaching the guide body, a bottom portion in the guide bracket is fixed. The upper surface of the positioning part is brought into contact with the support shaft, and the insertion holes of the supporting shafts provided on both sides are configured to match. Therefore, each member only needs to contact the positioning part of the guide body with the bottom of the guide bracket. Since the insertion holes of the shafts coincide with each other, the work of inserting the support shaft required for mounting the heavy guide body can be easily performed, and the working efficiency can be improved. And so forth, which are useful new effects.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2A is a cross-sectional view of a main part showing a configuration of a crawler traveling device. (B) is a side view of the main part of the above.

FIG. 3 is an enlarged side view of a partially omitted main part showing an attached state of an elastic crawler, idler wheels, and a guide body.

FIG. 4 is a longitudinal sectional view of a main part showing a mounted state of a freewheel.

FIG. 5A is an operation explanatory view showing a procedure for attaching a guide body to a guide bracket. (B) is an operation explanatory view of the same.

FIG. 6A is a side view showing a configuration of a conventional crawler traveling device. (B) is a vertical sectional view of a main part showing attachment of a conventional idler wheel. (C) is an essential part side view showing attachment of the conventional idler wheel by a support bolt.

[Explanation of symbols]

 2 Crawler traveling device 13 Drive wheel 14 Track frame 16 Idling wheel 17 Elastic crawler 18 Idling wheel 19 Mounting bracket 20 Guide body 20c Positioning portion 23 Bolt (screw) 26 Guide bracket 26a Bottom 27 Insertion hole 28 Insertion hole 29 Insertion bolt ( Spindle)

Claims (2)

[Claims] 1. A mobile agricultural machine having an elastic crawler wound between a driving wheel and an idler wheel pivotally supported at the front and rear ends of a track frame, and having a plurality of idler wheels mounted on the track frame between the wheels. In the crawler traveling device, the mounting bracket for pivotally supporting the idler wheel is detachably attached to the lower surface of the track frame via a screw that enters upward from below and the winding of the elastic crawler is removed. A crawler traveling device for a mobile agricultural machine, wherein a guide body for regulating the position of the crawler is located immediately below the head of the screw and extends in the direction in which the crawler is wound. 2. A lower U-shaped guide bracket for fixing a positioning portion formed on the upper surface of the guide body via a support shaft is fixed to a lower surface of the track frame. 2. The crawler running of a mobile agricultural machine according to claim 1, wherein the insertion holes of the support shafts provided on both sides of the positioning part are aligned with the upper surface of the positioning part abutting the bottom part in the bracket. apparatus.