JP2585228Y2 - Roller mounting structure of crawler traveling device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a structure for mounting a roller for guiding a crawler belt to a track frame.
In detail, the support shaft is rotatably supported by the boss of the track frame, and the end portion of the support shaft is provided with a boss portion of a rolling wheel in which a lightened portion is formed on an outer end surface of the end surface remote from the boss. The crawler travel device is provided with a mounting screw member for fitting and screwing to the support shaft to prevent the boss portion from being removed from the support shaft via a washer contacting the end surface of the boss portion. The present invention relates to a wheel mounting structure.

[0002]

2. Description of the Related Art Conventionally, a lightening portion of a rolling wheel for reducing the weight and cost is open to the entire side (for example, Japanese Utility Model Laid-Open No. 60-3181).

[0003]

Therefore, in the case of the above-mentioned prior art, the mud enters the hollow portion and accumulates as the vehicle travels in a field or the like, forming a large lump. Then, such a mud lump falls off from the wheel to the side by the traveling vibration, and soils the road when traveling on the road. Especially in combine harvesters, during cutting, mud lumps fall into uncut areas, causing the planted grain culms to fall down or become soiled. An object of the present invention is to prevent muddy soil from entering the hollow portion.

[0004]

A feature of the present invention is that a support shaft is rotatably supported by a boss of a track frame, and an end of the support shaft is provided on an outer end surface of the end surface remote from the boss. The boss portion of the rolling wheel having the lightened portion is fitted and screwed to the support shaft to prevent the boss portion from being removed from the support shaft via a washer contacting the end surface of the boss portion. In the wheel mounting portion structure of the crawler traveling device provided with a mounting screw member, the end of the support shaft is formed as a tapered shaft having a smaller diameter toward the end, and the inner peripheral surface of the boss portion is formed. The boss portion is formed on a tapered peripheral surface that fits tightly to the end of the support shaft with the outer end protruding outward from the end surface of the support shaft, and the lightening portion is covered with a lid. A cover part for preventing soiling is formed on the washer.

[0005]

According to the present invention, after the boss of the rolling wheel is externally fitted to the end of the support shaft, the screw member is attached to the support shaft with the washer interposed between the end surface of the boss and the screw member. By screwing and tightening, the inner peripheral surface of the boss portion formed on the tapered peripheral surface can be brought into a close fitting state in which the inner peripheral surface of the boss portion is pressed against the outer peripheral surface of the end of the spindle formed on the tapered shaft. Become like
In other words, the end of the support shaft is formed in a tapered shaft, and the inner peripheral surface of the boss is formed in a tapered shape, so that the rolling wheel can be easily and stably maintained with respect to the support shaft. And the relative rotation between the support shaft and the wheel can be easily prevented by the effective pressure contact between the tapered surfaces, and the joining caused by the relative rotation between the support shaft and the wheel can be achieved. It is possible to prevent wear of the part and loosening of the screw member for attaching the wheel. Furthermore, the joint reaction force generated between the end of the support shaft and the boss of the wheel can prevent the screw member for mounting the wheel from loosening due to vibration of the machine body or the like. In addition, since the washer acts as a cover for covering the lightening portion, it is possible to reduce the weight and reduce the cost by forming the lightening portion on the rolling wheel, while preventing the mud from entering the lightening portion. Can be prevented. In addition, since the cover is formed by forming the cover portion on the washer instead of separately providing the cover, the structure and operation for attaching the cover to the wheel are unnecessary. In addition, since the cover is formed on the washer, the cover can be attached to the boss of the roller with a large screw member when attaching the roller to the support shaft, and the cover for the end face of the boss of the roller is provided. Contact area of the cover can be increased, thereby effectively suppressing the fine vibration of the cover due to the vibration of the body. Can be prevented.

[0006]

[Effects of the Invention] Therefore, according to the present invention, by forming the lightening portion, while reducing the weight and cost of the rolling wheel, mud enters the lightening portion, that is, it becomes a large lump. It is possible to prevent the soiling of the road and the fall of the planted culm on the uncut ground due to the falling off, and yet, without complicating the structure and deteriorating the mounting work, and furthermore, the The assembling of the rolling wheel and the cover is performed by tightening a single screw member at the center portion which is screwed to the supporting shaft, but the end of the supporting shaft generated by the tightening of the screw member and the boss portion of the rolling wheel. With the synergistic effect of the press contact force and the joint reaction force between the boss and the cover (washer) against the end surface of the boss, the loosening of the screw member can be effectively prevented, and the rolling wheel and the soiling on the support shaft can be prevented. The mounting strength of the prevention cover can be increased. It becomes possible to provide the rotary wheel mounting portion structure of the roller driving device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 3, a crawler traveling device used as a traveling device of a combine is configured to guide a ground contact portion of a crawler belt 1 by a plurality of rolling wheels 3 mounted on a track frame 2. I have. 4 is a driving wheel, 5
Is a tension wheel. The crawler belt 1 includes:
As shown in FIG. 1, a plurality of metal cores 6 are buried with a gap in the rotation direction, and each of the metal cores 6 includes a pair of left and right protrusions 7 for preventing derailing. That is, two rows of the protrusions 7 are formed on the inner peripheral surface of the crawler belt 1. The rolling wheel 3 is an outer rolling wheel that guides a portion of the crawler belt 1 that is positioned laterally outside the row of the protrusions 7,
At both ends of a support shaft 9 rotatably supported via a bearing 8 on a boss 2A of the track frame 2, the support shaft 9 is mounted so as to rotate integrally with the support shaft 9. The rolling wheel 3 includes a boss 3A fitted to an end of the support shaft 9, a rim 3B rolling on the inner peripheral surface of the crawler belt 1, and an end of the rim 3B in the axial direction. Of these, the disk 3C for connecting the end on the boss 2A side to the boss 3A is integrally formed. That is, the lightened portion 3a for reducing the weight is formed on the outer end surface of the end surface farther from the boss 2A.

The means for attaching the wheel 3 to the shaft 9 is such that the end of the support shaft 9 is formed as a tapered shaft having a smaller diameter toward the end, and the inner peripheral surface of the boss 3A is formed outside the boss 3A. The boss portion 3 is formed on a tapered peripheral surface that fits tightly to the end surface of the support shaft 9 with its end protruding outward from the end surface of the support shaft 9.
A mounting nut for pressing the washer 10 against the outer end surface of the boss portion 3A by providing a washer 10 in contact with the outer end surface of the boss portion 3A by screwing into a bolt portion 9a protruding outward from the end surface of the support shaft 9 11 (an example of a screw member). In other words, the boss 3A is pressed against the support shaft 9 toward the boss 2A via the washer 10 by tightening the nut 1, and the boss 3A is stopped against the end of the support shaft 9 and the axial center position is set. It is configured to fit closely. The washer 1
0 is a central washer 10 that contacts the outer end surface of the boss 3A.
A and an outer peripheral cover portion 10B for preventing soil from entering, which covers the lightening portion 3a of the wheel 3. That is, the washer 10 also serves as a cover for preventing soil from entering the hollow portion 3a. Further, a seal is provided between the boss 2A and the disk portion 3C of the wheel 3 so as to externally seal a space where the outer surface of the bearing 8 faces. This seal is boss 2
A-side fixed contact ring 12A and rolling wheel 3-side rotating contact ring 12B
A mechanical seal comprising: a stationary contact ring 12;
A and the rotating contact ring 12B are each made of an elastic body 12 such as rubber,
It is attached to the corresponding boss 2A and the wheel 3 via C and 12D. As shown in FIG. 2, three screw holes 13 are formed in the wheel 3 with a gap therebetween in the circumferential direction. Usually, bolts 14 and rubber washers 15 are screwed into the screw holes.
When the wheel 3 is removed from the support shaft 9 (pulled out), a bolt for forming a receiving portion receiving the pulling force on the wheel 3 is attached to the wheel 3. Alternatively, it is used when a bolt for connecting the pull-out jig to the wheel 3 is mounted on the wheel 3 or the like. In addition, washer 1
0, the washer 10
A hole 16 is formed to allow operation of the bolt 14 in a state in which the bolt 14 is mounted on the support shaft 9. In the above embodiment, a nut is shown as the screw member 11, but the screw member 11 may be a bolt that is screwed into a screw hole of the support shaft 9.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a main part.

FIG. 2 is a side view of a main part.

FIG. 3 is an overall side view.

[Explanation of symbols]

 2 Track frame 2A Boss 3 Roller wheel 3A Boss part 3a Lightening part 9 Support shaft 10 Washer 10B Cover part 11 Screw member

Claims (1)

(57) [Scope of request for utility model registration] 1. A boss (2A) of a track frame (2).
A rotatable support shaft (9) rotatably supported, and a hollow portion (3a) formed at an end of the support shaft (9) on an outer end surface of the end surface remote from the boss (2A). A boss (3A) of the ring (3) is fitted and washer (10) which comes into contact with the end surface of the boss (3A) by screwing to the support shaft (9).
A rotary wheel mounting portion structure of the crawler traveling apparatus boss portion (3A) is provided with support shaft (9) threaded member (11) for mounting the retaining fit against through, the support shaft (9 ) End
When the part is formed on a tapered shaft with a smaller diameter toward the end
In both cases, the inner peripheral surface of the boss (3A) is
The outer end of A) projects outward from the end surface of the support shaft (9).
Taper that is tightly fitted to the end of the support shaft (9)
A cover (10B) for preventing soil penetration , which is formed on the peripheral surface of the shape and covers the lightening portion (3a), is provided on the washer (10)
The wheel mounting part structure of the crawler traveling device formed in the above.