JPH08239066A - Rotating wheel structure - Google Patents

Abstract

PURPOSE: To prevent mud from gathering in the recessed part of a rotating wheel by fitting a substantially disc-shaped wheel cover integrally or almost integrally onto an end part opened in the recessed condition of a wheel part, and seal-closing the end part of a boss part and the internal space of the wheel from the outside. CONSTITUTION: While the wheel part 6c of a rotating wheel 6 is rolling on the inner surface on the ground side of a crawler 7, riding on both the sides of double protrusions 7a of the crawler 7, it supports the weight of a combined harvester and thresher through the crawler 7. The tension on the crawler 7 is adjusted by a crawler tension adjusting device. The crawler 7 spatters mud and rotates while it is sinking in a wet rice field. At this time, the mud flies on the rotating wheel 6, however, it is blocked by the wheel cover 26 of the rotating wheel 6, so the mud will not enter the internal space S of the wheel part 6c, and an internal journal part from the end of a boss part 6a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wheel structure equipped with crawlers, and more particularly to a wheel structure equipped with a mudguard cover.

[0002]

2. Description of the Related Art Recently, agricultural mechanization has been actively carried out,
A crawler is attached to a large combine or the like used in a wet field or the like.

[0003]

However, since the rolling wheel rolling on the ground-side inner surface of such a crawler such as a combine is open at the side, it is generally recessed.
During traveling in the wetland, mud was likely to accumulate in the recesses, increasing the weight of the aircraft such as the combine and increasing the ground contact pressure, which deteriorated the wetland properties. Therefore, an object of the present invention is to provide a rolling wheel structure capable of preventing the accumulation of mud in the recesses of a rolling wheel such as a combine harvester.

[0004]

The present invention has been made in view of the above circumstances. For example, referring to FIGS. 1 and 4, the drive wheel (3) and the idle wheel (5) are shown. ) And a plurality of rolling wheels (6), the crawler (7) is wound around the traveling device (1) of the vehicle, wherein the crawler (7)
The rolling wheels (6), which roll over the inner surface of the ground side of the crawler and support the vehicle weight, straddling both sides of both the projecting portions (7a) and (7a) of the crawler, support the axle supported by the traveling frame (2). (1
9) or a boss portion (6a) which is rotatably supported on a shaft via a bearing, and a concave wheel portion which rolls on the inner surface of the crawler on the ground side on the outer periphery of the boss portion. (6c), and at the end of the wheel portion which is opened in a concave shape, a substantially disk-shaped wheel cover (2
6) is integrally or integrally provided, and the end portion of the boss portion,
And the inner space (S) of the wheel portion is closed from the outside in a hermetically sealed manner.

[0005]

Based on the above structure, the crawler (7) wound around the drive wheel (3), the idle wheel (5) and the plurality of rolling wheels (6) is driven by the drive wheel (3). Being rotated,
The vehicle is moved forward and backward by the rotation of the crawler (7), and the rolling wheels (6) support the vehicle weight via the crawler (7). At this time, a substantially disc-shaped wheel cover (26) is integrally provided at the end of the wheel portion (6) of the wheel (6) that is open in a concave shape, and the wheel (6) is The end portion of the boss portion (6a) and the inner space (S) of the wheel portion (6c) are closed from the outside in a sealed manner. Therefore, during traveling in the wetland, the mud does not collect inside the wheel portion (6c) of the rolling wheel (6) and the end portion of the boss portion (6a) and accumulate, and the wheel cover (26 The mud adhering to ()) is then dropped onto the ground from the grounding side inner surfaces of the wheel cover (26) and the crawler (7) and is removed. The reference numerals in parentheses above do not limit the configuration in any way.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment will be described with reference to FIGS. 1, 3 and 4. Reference numeral 1 denotes a combine traveling device, which is provided with drive wheels 3 on both front sides of a frame 2, idle wheels 5 on the rear side, and a plurality of rolling wheels 6 on the ground side, and crawlers 7 on the drive wheels 3, 3.
It is wound around the idler wheel 5 and the rolling wheel 6, and an auxiliary wheel 9 is attached to the upper portion of the crawler 7 at approximately the center of the frame 2, and the idler wheel 5 can be moved in the front-rear direction at the rear portion of the frame 2. There is provided a crawler tension adjusting device 10 that is fixed to. As shown in FIGS. 1 and 3, the frame 2 is made of a steel plate having a U-shaped vertical cross section, and a plurality of inverted U-shaped notches 2a are provided in the lower portion of the frame 2 at a predetermined pitch. ing. 11 is a bearing box,
A substantially cylindrical bearing box part 11a is formed in the center, and arm parts 11b are formed on both sides of this bearing box part 11a.
A mounting portion 11c having a width substantially equal to the inner width of the frame 2 is formed at both ends of the arm portion 11b, and a bolt fitting hole 11d is provided at the center of the mounting portion 11c. Bolt fitting holes 2b are provided on both sides of the notch 2a of the frame 2, and the bearing housing 11 is fitted so that the bolt fitting holes 11d of the bearing housing 11 are aligned with the bolt fitting holes 2b.
Are clamped by the frame 2, bolts 12 are inserted into the bolt insertion holes 2b and 11d, and nuts 13 are screwed and tightened. In the figure, 15 is a washer. Further, a cylindrical portion 11e is formed in the center of the bearing box portion 11a, and large cylindrical portions 11f are formed on both sides of the cylindrical portion 11e, and the outer race 16a of the ball bearing 16 is formed in the cylindrical portion 11e.
Is inserted into the large cylindrical portion 11f in close proximity to the inner race 1
A spacer 17 is interposed between the 6b members, a shaft 19 is fitted in the inner race 16b, and an oil drainer 20 is fitted in the shaft 19 on the outer side of the inner race 16b.

Then, the boss portion 6a of the rolling wheel 6 is fitted on the outer side of the oil drainer 20, and the large diameter portion of the boss portion 6a is surrounded by the small outer gaps on both outer sides of the bearing box portion 11a. . Then, a concave wheel portion 6c having a fitting portion 6b on the outside of the large diameter portion of the boss portion 6a is fitted in the fitting portion 6b, and the large diameter portion of the boss portion 6a and the fitting portion 6b are screwed with the bolt 21.・ It is fixed. Also, the shaft 19
Is provided with a medium diameter threaded portion 19a at both ends and a small diameter threaded portion 19b at both ends of the medium diameter threaded portion 19a.
A large head nut 22 is screwed and fixed to one of the 9a, and a small head nut 23 is screwed and fixed to the other through a round washer 25.
The boss portions 6a, 6a of the rolling wheel 6, the oil drainers 20, 20, the inner races 16b, 16b are connected to the shaft 19 via the spacer 17.
It is positioned and fixed to. And the wheel portion 6c
Is provided with a notch groove 6d along the circumference on the inner side of the outer end opened in a concave shape, and the inner edge of the outer peripheral portion is pressed against the notch groove 6d, and the hole 26a at the center is provided with the small diameter screw portion 19b of the shaft 19. The substantially disk-shaped wheel cover 26 inserted into the spring washer 2
7 is screwed and fixed by a nut 29, and the hole 26
The inner edge of a is pressed against the stepped portion at the end of the large-diameter threaded portion 19a. In addition, 30 is an oil seal for sealing the oil between the oil drainer 20 and the shaft 19.

Since the present embodiment is constructed as described above, the drive wheels 3 are rotated in the forward and reverse directions via an engine and a transmission (not shown), and the crawlers 7 are locked to the sprocket portions of the drive wheels 3. When the forward rotation is performed along the idle wheel 5, the rolling wheels 6, and the auxiliary wheels 9, the combine moves forward, and when the reverse rotation is performed, the combine moves backward. And the wheel portion 6c of the rolling wheel 6,
6c supports the weight of the combine via the crawler 7, while straddling both sides of both the protrusions 7a of the crawler 7 and rolling on the ground-side inner surface of the crawler 7. The tension of the crawler 7 is adjusted by the crawler tension adjusting device 10. At this time, the crawler 7 repels the mud while rotating to a certain degree while sinking into the wetland, and the mud rolls the wheel 6.
Although it spills over, it is blocked by the wheel cover 26 of the wheel 6, and the mud does not enter the inner space S of the wheel portion 6c or the inner shaft support portion from the end portion of the boss portion 6a. Therefore, the mud does not accumulate in the end of the boss portion 6a of the wheel 6 and the recess of the wheel portion 6c, and the weight increase of the combine due to the mud is prevented, so that the wetland property (immersing into the wetland) can be improved. , The combine driving power can be saved. Further, since the rolling wheel 6 is detachably divided into the boss portion 6a and the wheel portion 6c, it is easy to screw and fix the boss portion 6a to the shaft 19, and only the boss portion 6a is attached to the shaft 19. In the closed state, the protrusion 7a of the crawler 7 is attached to the boss 6a.
Since it does not interfere, it is easy to hang the crawler 7,
The wheel portion 6c can be easily attached to the boss portion 6a after the crawler 7 is hung, and the assembling and maintenance work can be saved.

Next, a second embodiment will be described with reference to FIG. The same members as those in the first embodiment shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. The length of the cylinder portion of the wheel portion 6'c of the rolling wheel 6 is large, and the tip end thereof is close to the tip end of the crawler 7. Also, the small-diameter threaded portion 1 of the shaft 19
9b is long and is planted in the large diameter portion 19a by a plant screw, and a wheel cover 26 'is formed in a substantially disc shape. Since the present embodiment is configured as described above, the tip portion of the wheel portion 6'c has a thin side portion 7b of the crawler 7.
The side portion 7b of the crawler 7 is prevented from bending upward due to the mud pressure of the wetland to reduce the bending stress of the side portion 7b of the crawler 7 and bend the side portion 7b of the crawler 7. It is possible to prevent deformation, cracking and damage, and increase the effective width of the crawler 7 to reduce the ground contact pressure, that is, improve the wetland property. Further, since the wheel portion 6'c is detachably attached to the boss portion 6a, in the dry field, the short wheel portion 6 '
It can be replaced with c (see Fig. 1), allowing for the proper use of dry and wet fields. The side portion 7b of the crawler 7 is gradually thinned outward so that the crawler 7 is gradually separated from the central portion when it is separated from the wetland, so that the crawler 7 can be released well in the wetland. Therefore, the wetland property can be improved while maintaining the state in which the engine output for driving the crawler 7 is reduced,
The life of the crawler 7 can be extended.

Next, a third embodiment will be described with reference to FIG. As shown in FIG. 5, by increasing the diameter of the rolling wheels 6, the traveling device 1 of the combine becomes higher, so that it is possible to compensate for the sinking of the combine in the wetland. Further, since the rolling wheel 6 (see FIG. 1) of the first embodiment is removable, it is possible to selectively use the dry field and the wet field only by replacing the rolling wheel 6 having a large diameter or a small diameter. Another embodiment aiming at both dry field and wet field use by supplementing the ground contact height by increasing the outer diameter of the rolling wheels 6 of the vehicle in this way will be described with reference to FIGS. 6 to 8.

Reference numeral 31 denotes a frame formed in a hollow square shape on both sides of the combine, and a pipe 32 in the left-right direction is penetrated and joined to a required portion of the frame 31, and a lower surface of the frame 31 is Just below the pipe 32,
A pipe 33 having the same shape as the pipe 32 is attached by a U-shaped band 35 having high rigidity, and both front and rear ends of the band 35 are fixed to the frame 3 by bolts 36 via washers 37.
It is screwed and fixed to 1. Further, a repair member 38 that penetrates the frame 31 from above and below is attached to the frame 31 at the screwing portion of the bolt 36. Further, in FIG. 6, the small diameter portion 39a of the shaft 39 is fitted into the pipe 33,
The large diameter portion 39b is provided in a portion near the outside of the
The inner races of the ball bearings 40 are fitted to the small diameter portions 39a in proximity to both side steps of the ball bearing 9b, and the outer races of both ball bearings 40 are attached to the boss portion 41 of the rolling wheel 6 by the retaining ring 4.
2, the spacer 43 is attached inside the inner race of the inner ball bearing 40, and the male screw portion 39c provided at the inner end of the shaft 39 is provided with a hole 45a penetrating the male screw portion 39c at the center. A stopper plate 45 whose outer peripheral portion can contact the pipe 33 is inserted, and the stopper plate 45 is screwed and fixed by a nut 47 via a washer 46, and the inner race of the inner ball bearing 40 is fixed to the shaft 39. And the shaft 39 is attached to the frame 31
It is fixed to the pipe 33. Reference numeral 49 in the drawing denotes an oil seal provided between the spacer 43 and the inner peripheral surface of the boss portion 41. Further, concave (cup-shaped) wheel portions 50a and 50b facing outward are attached to the outer circumferences of both side portions of the boss portion 41. The wheel parts 50a and 50b are provided with disc-shaped wheel covers 52a and 5b.
2b are integrally attached, and a dust cover 53 is attached to the wheel cover 52b. In FIG. 8, the shaft 39 is attached to the pipe 32 as described above.

Since this embodiment is constructed as described above,
When the field is a dry field, it is assembled as shown in FIG. 8, and when it is a wet field, it is assembled as shown in FIG. That is, the H dimension shown in FIG. 7 corresponds to the height at which the combine is submerged in the wetland. Therefore, the pipe 33 is attached to the frame 31.
By simply attaching the shaft 39 to the pipe 32 or 33, a combine harvester for both dry and wet fields can be easily formed, and mass productivity can be improved, so that the cost of the combine can be reduced. Further, by lowering the lower surface of the wheel 50 of the same vehicle in this way, the angle θ between the crawler 7 and the ground surface 51 shown in FIG. 9 is increased, and the submerged state is restored. Performance can be improved.

[0013]

As described above, according to the present invention, the wheel portions (6c) and (50a) of the rolling wheel (6) are provided at the concavely opened ends of the wheel cover (26),
(52a) is integrally or integrally provided, and the ends of the bosses (6a) and (41) of the rolling wheels and the internal space (S) of the wheel are hermetically closed from the outside. Even if the crawler (7) runs while sinking to some extent, the mud is blocked by the wheel covers (26) and (52a) of the rolling wheels (6), so that the inner space (S) of the wheel parts (6c) and (50a) is blocked. ) Or bosses (6a) and (41) end up with mud, and the inner space (S) of the wheel (6) and
No accumulation at the ends of the bosses (6a) and (41)
Therefore, mud does not enter the boss portions (6a) and (41) of the rolling wheel (6) and adversely affects the shaft support portion thereof.
Further, the weight of the rolling wheels does not increase due to the accumulated mud, and the wetland performance of the vehicle can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing a roller mounting portion of a first embodiment.

FIG. 2 is an enlarged cross-sectional view showing a roller mounting portion of the second embodiment.

FIG. 3 is a side view of FIGS. 1 and 2.

FIG. 4 is a side view showing a traveling device for a vehicle having a crawler.

FIG. 5 is a side view showing a third embodiment having a large diameter rolling wheel.

FIG. 6 is an enlarged sectional view showing a roller mounting portion of another embodiment of the third embodiment.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is an enlarged cross-sectional view showing a dry wheel roller mounting portion.

FIG. 9 is an explanatory diagram.

[Explanation of symbols]

 1 Vehicle traveling device (combining traveling device) 3 Drive wheel 5 Idler wheel 6 Rolling wheel 6a Boss portion 6c Wheel portion 7 Crawler 7a Projection portion 19 Shaft 26 Wheel cover

Claims (1)

[Claims] 1. A drive wheel (3), an idle wheel (5) and a plurality of rolling wheels
In a vehicle traveling device (1) constructed by winding a crawler (7) over (6), both protrusions (7) of the crawler (7) are
The rolling wheels (6) that straddle both sides of (a) and (7a) and support the vehicle weight by rolling on the inner surface of the crawler on the ground side are supported by the axles (2) and (31) supported by the traveling frames (2) and (31). 19) or shaft (3
A boss that rotatably supports the bearing 9) via the bearing 40.
(6a), (41), and a concave wheel portion (6c), (50a) that rolls on the inner surface of the crawler on the grounding side on the outer periphery of the boss portion
The wheel portion (26), (52a) having a substantially disc shape is integrally or integrally provided at the end of the wheel portion that is opened in a concave shape, and the end portion of the boss portion, And a wheel structure characterized in that the inner space (S) of the wheel portion is closed from the outside in a hermetic manner.