JPH063744Y2 - Centering structure of the rut distance adjusting device in the working vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a centering 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 thing, the axle of the traveling body is
The drive shaft on the body side of the machine body is interlockingly connected by a spline fitting method so as to be movable in the axial direction. In such a case, it is necessary to assemble the drive shaft and the axle in a state where they are accurately aligned. If this is not done, the swing of the drive sprocket will be large, and unreasonable force will be applied to the members such as the axle. Although it is not forgiven that it will work or interfere with other members and will be damaged, there will be problems such as the lateral movement of the traveling body being not smoothed, but conventionally, there is a known means for easily performing this centering. The reality was that it was not done.

[Means for Solving Problems] The present invention has been made in view of the above circumstances, and was devised for the purpose of providing a centering structure of a rut distance adjusting device in a working traveling vehicle capable of eliminating these drawbacks. In the traveling machine body for work in which at least one of the left and right traveling bodies provided in the machine body is moved in the left-right direction, the rudder distance between the traveling bodies can be adjusted. In addition, in order to fit the axle on the moving traveling body side so that it can move in the axial direction freely, the spline fitting back end of the drive shaft and the axle is abutted and fitted in the most contracted state of both axles. It is characterized in that a mating fitting portion for aligning the core is formed.

The present invention, with this configuration, allows the axle and the drive shaft to be easily and surely aligned with each other.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 is a combine traveling machine body, and the traveling machine body 1 includes a pre-processing unit 2 for pre-processing such as cutting stem culms, 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 in the grain bag, etc. 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 that is integrally assembled to the frame via the support frame 6a. On the other hand, the cut land side (moving side) traveling body 7 is composed of members such as a drive sprocket 7a, a wheel 7b, an idler 7c, and a crawler 7d. 8a is provided, and the roller 8a rolls on a guide rail 9a provided on the machine body frame 9 so that the traveling body 7 can be moved left and right. Further, a pantograph type expansion / contraction mechanism 9 with a hydraulic cylinder 9a is provided between the two traveling frames 6a and 8.
Is installed, and the traveling body 7 can be moved in the left-right direction by the expansion / contraction operation of the expansion / contraction operation mechanism 9 by the hydraulic operation of the hydraulic cylinder 9a.

Reference numeral 10 denotes a transmission case mounted on the airframe, and a tip end portion of a drive shaft 11 extending from the transmission case 10 is a spline shaft 11a. A first sleeve 12 is provided on the outer periphery of the spline shaft 11a. The inner peripheral surface of the first sleeve 12 is spline-fitted so as to be slidable in the axial direction, and the second sleeve 13 is spline-fitted to the outer peripheral surface of the first sleeve 12 in a state where movement in the axial direction is restricted. . The outer peripheral surface of the axle 14 is also spline-fitted to the inner peripheral surface of the second sleeve 13 in a state in which movement in the axial direction is restricted, and thus the axle 14 is the drive shaft 11 of the first sleeve 12. It is set to move in the left-right direction by sliding in the axial direction with respect to.

Reference numeral 15 is a case body configured to cover from the base end portion of the drive shaft 11 to the tip end portion of the axle shaft 14. The case body 15 of the embodiment has three cylindrical bodies for a telescopic joint (telescopic joint). It is made to be expandable and contractible by being connected by a joint system, and an O-ring 16 is provided on the sliding surface portion between the respective cylinders to cope with the airtightness. On the other hand, 17 is a cylindrical body integrally provided in the transmission case 10, and a breather hole 17a is provided in the cylindrical body 17 when the case body 15 expands and contracts. Eighteen inner edges are integrally provided. A bearing 19 is provided on the inner surface of the spherical seal 18.
Although it is supported by the drive shaft 11 via the, the inner peripheral surface of the case body 15 is externally fitted to the outer peripheral circular arc surface of the spherical seal 18 in a state of being sealed by the O-ring 16a, so as to cope with misalignment. You can do it. The front end of the case body 15 is supported by the front end of the axle 14 via a bearing 19a, and is further fixed integrally to the traveling frame 8 via a bolt 20.

Further, the tip of the axle 14 has a bottomed groove shape, and the groove bottom has a mortar-like shape to form a mating recess 14a, while the tip of the drive shaft 11 has the mating recess 14a.
The conical convex portion 11b is formed to correspond to the above. When the axle 14 and the drive shaft 11 are deeply fitted to each other so as to be most reduced, the mating concave portion 14a and the mating convex portion 11b are butted against each other so that the shafts 11 and 14 can be aligned with each other. There is.

In the embodiment of the present invention constructed as described above, when performing a splitting work or a ridge work, the traveling body 7 is moved inward by the operation of the expansion and contraction operating mechanism 9 to drive both traveling bodies 6, 7.
If the rudder distance is reduced, it is possible to avoid the trouble that the traveling body 7 tramples the uncut culm or rides on the ridge, and the orderly harvesting work can be performed smoothly, while the normal work is performed. The traveling work 7 can be moved to the outermost side and a harvesting operation can be performed with a wide and stable rut distance.

As described above, in the present invention, the traveling body 7 can be moved in the left-right direction to freely adjust the distance between the tracks, but in this assembly, the drive shaft 11 and the axle 14 are combined. The centering is automatically performed by setting both shafts 11 and 14 in the most contracted state, and the assembling may be performed in this state. That is, a conical fitting protrusion 11b formed at the tip of the drive shaft 11 and a mortar-shaped fitting recess 14 formed at the tip of the axle 14.
and a are abutted in a state in which both shafts 11 and 14 are deeply spline-fitted so as to be most contracted (though it does not matter here whether or not the shafts are contracted even after assembly). As a result, in this state, the two are accurately centered, and if other necessary assembling work is performed in the proper state, the two can be assembled in the accurately centered state. As a result, it is possible to eliminate the problem that the drive sprocket swings, and it is possible to contribute to high accuracy in many cases. Moreover, this centering work is performed by simply spline-fitting the drive shaft 11 and the axle 14 so that the drive shaft 11 and the axle 14 are in the most contracted state. The aligning work is remarkably simple, does not impose a burden on the assembling work, and the work efficiency can be effectively prevented from decreasing.

[Advantages] In short, since the present invention is configured as described above, on the traveling body side that moves to adjust the rutted distance, the spline-fitting drive shaft and the axle are aligned with each other. When the spline is deeply fitted so as to be the most contracted, the mating mating part formed at the mating back end is abutted and mated automatically, and therefore the centering between the spline mating axes is performed. The accuracy is remarkably improved, and it can be assembled without any runout. Moreover, since this centering work only requires deep spline fitting so that the distance between the two shafts is most reduced, workability can be improved without any work load.

[Brief description of drawings]

1 shows an embodiment of a centering structure of a rut distance adjusting device in a working traveling vehicle according to the present invention. FIG. 1 is an overall front view of a combine, and FIG. 2 is a front plan view of the same. FIG. 3 is a front sectional view of the traveling body, FIG. 4 is a schematic side view of the traveling body, FIG. 5 is a longitudinal sectional view showing an extended state of the drive wheel portion, and FIG. 6 is a contracted state thereof. FIG. In the figure, 1 is a traveling body, 6 and 7 are traveling bodies, 11 is a drive shaft, 11
Reference numeral b is a fitting convex portion, 14 is an axle, and 14a is a fitting concave portion.

Claims (1)

[Scope of utility model registration request] 1. A working traveling machine body in which at least one of the left and right traveling bodies provided in the machine body is moved in the left-right direction so that the rut distance between the traveling bodies can be adjusted. In order to fit the axle on the moving traveling body side so that it can move in the axial direction freely, the spline fitting back end of the drive shaft and the axle is abutted and fitted in the most contracted state of both axles. A centering structure of a rut distance adjusting device in a working vehicle, wherein a centering fitting portion for centering is formed.