JPH0613035Y2 - Bearing structure of rudder distance adjusting device in working vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bearing portion structure of a rut distance adjusting device in a working traveling machine such as a combine.

[Problems to be Solved by Prior Art and Invention] Generally, in a traveling machine for work, when this is a combine, for example, when dividing work or ridge work, it is usually located on the side of the cut land. There is a case where the traveling body that runs is stepped on the uncut stem culm or climbs up on the ridge, so that the traveling body on the already cut land side can be moved to the other side,
For example, it is known from JP-A-61-5717. By the way, in such a case, it is necessary to spline-fit the axle to the drive shaft projecting from the transmission case so as to be slidable in the axial direction so that the traveling body can be moved. When rotatably supporting the vehicle with a wheel, the mud carried by the crawler may invade the bearing portion provided between the vehicle bearing tube and the axle, impairing the smooth rotation of the axle. It is necessary to seal it so that there is no However, in the case where the outer end of the car bearing tube is opposed to the inner surface of the cored bar, the outer surface of the seal part is directly opposed to the cored bar, and therefore the mud carried around by the crawler is used. May be pushed into the seal part and the seal material may be damaged early. Therefore, it is also proposed to extend the outer end of the car bearing sleeve outward so as to overlap the core metal, but in this case, the crawler prevents the core metal from contacting the car bearing cylinder. However, this method cannot be adopted because of the new drawback that a large-sized one with a wide vertical gap must be used.

[Means for Solving the Problem] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a bearing portion structure for a rut distance adjusting device in a working vehicle that can eliminate these drawbacks. In a traveling machine for work in which a traveling body that moves in the left-right direction with respect to the machine body is provided so that a rut distance between the left and right traveling machines can be adjusted, an axis of a drive shaft protruding from the machine body side A small diameter part that exceeds the crawler core metal top part of the car bearing cylinder while making the outside part of the car bearing cylinder that rotatably supports the axle that is spline-fitted so that it can move in any direction to face the top part of the crawler core metal It is characterized in that the outer end surface and the inner end surface of the drive wheel boss portion for fixing the axle are oppositely assembled in a labyrinth structure in which they are fitted in concave and convex portions.

The present invention, by virtue of this structure, makes it possible to effectively protect the seal portion provided between the vehicle bearing sleeve and the axle without increasing the size of the crawler.

[Embodiment] Next, an 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 pre-processing unit 2 for pre-processing such as cutting stem stalks, a threshing unit 3 for threshing cut stalks, and a discharging unit. The post-processing section 4 for performing post-processing such as shredding the culm, the grain storage section 5 for storing the selected grain, and the like are all conventional.

Reference numerals 6 and 7 are a pair of left and right crawler-type traveling bodies. The traveling body 6 is for the uncut land side and the traveling body 7 is for the already cut land side. It is of a fixed type integrally assembled to the frame 1a. On the other hand, the traveling body 7 on the side of the cut land (moving side) is configured to be movable left and right by a roller 8a provided at an upper end portion of the traveling frame 8 rolling a guide rail 1b provided on the machine body frame 1a. Has been done. Further, a hydraulic cylinder 9 is provided between one side portion of the machine body frame 1a and the upper end portion of the traveling frame 8, and a pantograph type link mechanism 9a is provided between the other side portion of the machine body frame 1a and the traveling frame 8. The traveling body 7 is provided so as to move in the left-right direction by the operation of the link mechanism 9a accompanying the expansion and contraction operation of the hydraulic cylinder 9.

Reference numeral 10 denotes a transmission case mounted on the machine body, and a drive shaft protruding from the transmission case 10.
The tip of 11 is connected to the spline shaft 11a. The inner peripheral surface of the first sleeve 12 is spline-fitted A so as to be slidable in the axial direction on the outer periphery of the spline shaft 11a. A half part of the second sleeve 13 is spline-fitted B on the outer peripheral surface of the in the state where movement in the axial direction is restricted. Further, the outer peripheral surface of the axle 14 having a tubular shape on the inner peripheral surface of the other half of the second sleeve 13 is spline-fitted C in a state in which movement in the axial direction is similarly restricted.
The power transmission from 11 to the axle 14 is made via three sets of spline fittings A, B, C, while the lateral movement of the axle 14 relative to the drive shaft 11 is relative to the drive shaft 11 of the first sleeve 12. It is configured by a spline fitting A.

Reference numeral 15 is a support cylinder provided to cover the base end portion of the drive shaft 11, and the support cylinder 15 is integrally fixed to the transmission case 10 and the machine body frame 1a by bolts 15a. The base end of the fixed cylinder 16 is fitted on the outer periphery of the front end of the. A flexible seal 17 also serving as an oil seal and a steel ring 18 are interposed at the overlap portion between the outer end of the support cylinder 15 and the inner end of the fixed cylinder 16.
O-rings 18a are fixed to the inner and outer recesses of the ring 18.

Further, the inner portion of the movable barrel 19 is fitted on the outer periphery of the fixed barrel 16 so as to be movable in the left-right direction. The outer portion of the movable barrel 19 is screwed onto the outer periphery of the inner portion of the car bearing barrel (bearing holder) 20. It is integrally mounted by a slip fit 20a, and the axle 14 is rotatably supported on the inner tubular surface of the vehicle bearing barrel 20 via a pair of left and right bearings 22. Furthermore, car bearing tube 22
Is a traveling frame 8 via a bracket 21 having a substantially U shape.
Is integrally fixed to. Moreover, the outer portion of the car bearing cylinder 20 has a small diameter on both the inner and outer surfaces in order to prevent the outer bearing 22 from coming off, but the top of the core metal 25a of the crawler 25 faces the outer peripheral surface of the small diameter portion 20b. Small diameter part 20b at approximately the opposite position of core metal
A seal member 26 having an oil seal function is interposed between the vehicle and the axle 14. Further, a collar-shaped portion 20c is formed on the outer peripheral surface of the seal portion of the small-diameter portion 20b so as to face toward the center, and faces the axle 14 with a slight gap. The outer end of the small-diameter portion 20b projects beyond the brim-shaped portion 20c and protrudes from the core metal.
It projects from the top of 25a to a position that is slightly outward, but is formed into a step-shaped outer end surface by the outer surface of the collar-shaped portion 20c, and is bolted to the step-shaped outer end surface and the axle 14. The driving wheel 24 and the inner end surface of the boss portion are fitted to each other in a concavo-convex manner so as to be assembled so as to form a labyrinth structure. In addition, the inside of the support cylinder 15, the fixed cylinder 16, the movable cylinder 19, and the car bearing cylinder 20 is a lubricating oil chamber independent of the transmission case 10 to lubricate the power transmission shaft diameter.

In the embodiment of the present invention configured as described above, in the case of dividing work or ridge work, the traveling body 7 is moved inward by extending the hydraulic cylinder 9, and both traveling bodies 6, If the rut distance of 7 is reduced, it is possible to avoid the problem that the traveling body 7 tramples uncut grass stems or rides on ridges, and smooth and tidy harvesting work can be performed.
In the case of performing normal work, the traveling body 7 can be moved to the outermost side and the harvesting work can be performed with a wide and stable rut distance.

As described above, according to the present invention, the traveling body 7 can be moved in the left-right direction as necessary, and the rut distance can be freely adjusted according to traveling conditions.
Is rotatably supported by a car bearing cylinder 20 integrally fixed to a movable cylinder 19 via a bearing 22. In this case, a small-diameter portion 20b is formed on the outer end of the car bearing cylinder 20 and overlaps the top of the cored bar 25a of the crawler 25, and its outer end is slightly outside the position of the cored bar 25b. It is located towards As a result, the mud carried around by the crawler 25 is prevented from being pressed by the core metal 25a and intruding from the side, and the scraper action of the core metal 25a reduces the small diameter portion 20b.
The mud and straw scraps that adhere to the surface will be scraped off positively. In addition, this product has a labyrinth structure in which the opposing surfaces of the car bearing cylinder 20 and the drive wheel 24, which extend beyond the top of the core metal 25a to the outside, are recessed and engaged with each other to form a maze structure. Therefore, the sealing material 26 can be reliably protected.

Moreover, since the small diameter portion 20b of the car bearing tube 20 faces the core metal 25a, even if the structure overlaps the core metal 25a, the vertical distance between the crawlers should be narrowed by the amount of the small diameter. Therefore, it is possible to effectively prevent the traveling body from becoming large.

Further, in this structure, since the car bearing cylinder 20 is integrally fixed to the traveling frame 8 and it is not necessary to receive the load received by the drive shaft 11 side, the shaft diameter can be made small on the drive shaft side. This further contributes to the reduction in size and weight of the device.

[Advantages] In summary, since the present invention is constructed as described above, the traveling body side axle for adjusting the rut distance is rotatably received by the car bearing tube. However, in this case, in the car bearing tube, the small diameter portion is overlapped with the top of the crawler core metal, and the outer end surface of the small diameter portion beyond the top of the core metal and the inner end surface of the boss portion of the drive roller fixed to the axle are uneven. It has a labyrinth structure that fits together and is counter-assembled. As a result, the core metal acts as a scraper on the small diameter part to positively scrape off the mud and the like carried around by the crawler, and at the same time, the position of the core metal is displaced and the existence of the counter surface part forming a labyrinth structure creates a synergistic effect. It is possible to reliably prevent the mud and the like from invading the seal portion interposed between the axle and the axle of the car bearing cylinder due to such an action. Moreover, since the opposing portion of the core metal is a small diameter portion, it is not necessary to employ a crawler of a particularly large size.

[Brief description of drawings]

The drawings show an embodiment of the bearing portion structure of the rutter distance adjusting device in the working vehicle according to the present invention,
FIG. 1 is an overall perspective view of a combine, FIG. 2 is a schematic perspective view of a machine body frame portion, FIG. 3 is a perspective view of a power take-out portion for a moving side traveling body, FIG. 4 is a side view of the same, and FIG. Is a vertical cross-sectional view showing a state where the moving-side traveling body is moved inward, FIG. 6 is a vertical cross-sectional view showing a state where the moving-side traveling body is moved outward, FIG. 7 is a cross-sectional view showing a fixed state of the axle portion, and FIG. It is a traveling frame of a traveling body. In the figure, 1 is a traveling machine body, 7 is a moving side traveling body, 10 is a transmission case, 11 is a drive shaft, 14 is an axle, 19 is a movable cylinder, 20 is a car bearing cylinder, 20b is a small diameter portion, 22 is a bearing. , 25 is a crawler, 24 is a drive roller, 25a is a core metal, and 26 is a sealing material.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Omoto Inventor Keiichi Omoto, Higashi Izumo-cho, Yatsuka-gun, Shimane 667 No. 1, Koyacho, Mitsubishi Agricultural Machinery Co., Ltd. (56) Reference JP-A-62-261580 (JP, A) Actual Kai 54-111038 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A working traveling machine body in which a traveling body that moves in the left-right direction with respect to the machine body is provided so that a rut distance between the left and right traveling bodies can be adjusted, and a drive shaft protruding from the machine body side has an axial direction. The outside of the car bearing cylinder that rotatably supports the axle, which is movably spline-fitted, has a small diameter to face the top of the crawler core and the outside of the small diameter beyond the top of the crawler core of the car bearing cylinder. A bearing portion structure of a rut distance adjusting device in a working vehicle body, characterized in that an end surface and an inner end surface of a drive wheel boss portion for fixing an axle are assembled to face each other in a labyrinth structure in which they are fitted to each other.