JPH0717656Y2 - Rudder distance adjusting device for work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rut distance adjusting device for a traveling machine for work such as a combine.

[Problems to be Solved by Conventional Techniques and Inventions] Generally, in a traveling machine for work, for example, when this is a combine, it is located on the side of the cut land in normal work when dividing work or ridge work. There is a case where the traveling body may step on the uncut stem culm or ride on the ridge, so that the traveling body on the side of the cut land can be moved to the other side,
Appears today. By the way, in such a thing, the axle of the moving side traveling body is interlockingly connected by the spline coupling method so that it can move left and right in the axial direction with respect to the drive shaft on the body side of the machine body. error,
The axle may be misaligned with respect to the drive shaft due to an assembly error or the like. If this misalignment is to be directly absorbed by the play (play) of the spline joint, the play between the spline grooves must be taken large, which may hinder smooth power transmission. Therefore, it is considered that a sleeve is interposed between the drive shaft and the axle to form a plurality of spline coupling portions, and the plurality of spline coupling portions try to disperse and absorb the misalignment. In such a case, the diameter of the sleeve needs to be larger than the larger diameter of either the drive shaft or the axle, and as a result, the tubular body covering these transmission shaft systems including the sleeve is thicker. There is a problem that it becomes a diameter.

[Means for Solving the Problems] The present invention has been made in view of the above circumstances and was devised with the object of providing a rut distance adjusting device for a working traveling vehicle capable of eliminating these drawbacks. In the working traveling machine body, the axle body on the traveling wheel side is externally fitted to the driving shaft body on the transmission side so as to be movable in the axial direction, and the rut distance can be adjusted. Body and axle body, a first sleeve in which the inner peripheral surface is spline-coupled to the outer periphery of one of the smaller diameter side shaft bodies such that the inner peripheral surface is axially movable, and the first sleeve and the other large diameter side shaft The inner peripheral surface of the second sleeve is interlockingly connected to the outer peripheral surface of the body through second sleeves, and the first sleeve of the second sleeve and the spline joint portion of the other shaft body are located at substantially the same diameter position. It is also characterized by Of.

Further, according to the present invention, with this configuration, the cylindrical body that covers the drive shaft and the axle can be made as thin as possible.

[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, 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 (the driver seat side, but for the uncut land side). Body 6 is the aircraft frame 1a
It is a fixed type that is integrally assembled to. 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 the upper end of the traveling frame 8 rolling on 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. Is provided,
The traveling body 7 is adapted 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 spline groove 11a is formed on the outer periphery of a drive shaft 11 extending from the transmission case 10.
The inner peripheral surface of the cylindrical first sleeve 12 is spline-joined to the spline groove 11a so as to be slidable in the axial direction. Further, 13 is a second sleeve 13 in the shape of a cylinder. On the inner peripheral surface of the second sleeve 13, a groove portion 13a is formed around the periphery in the middle, and with this groove portion 13a as a boundary, one half side ( The left side of the drawing) The first sleeve 12 is provided on the inner peripheral surface.
The outer peripheral surface of the shaft is spline-coupled B, and the outer peripheral surface of the cylindrical axle 14 is spline-coupled C to the other half inner peripheral surface. Therefore, from the drive shaft 11 to the axle 14 into which the shaft is fitted. The power transmission is configured to be performed through the three sets of spline joints A, B, and C.
B and C are set to spline-join at approximately the same diameter.

Further, these spline coupling portions B and C restrict movement in the axial direction, and movement of the axle 14 with respect to the drive shaft 11 in the axial direction is performed by the spline coupling portion A of the first sleeve 12 with respect to the drive shaft 11. However, the configuration is as follows. That is, as for the spline coupling portion B, the transmission case 10 side has a C-ring 15 provided on the inner circumference of the second sleeve 13 for driving the sprockets of the second sleeve 13 with respect to the first sleeve 12 (the running of the present invention). The movement is restricted to the 16 side (corresponding to the wheels), and conversely, the movement to the transmission case 10 side is restricted by the first sleeve 12 coming into contact with the inner end of the axle 14. It has become.

On the other hand, the movement of the second sleeve 13 and the axle 14 in the axial direction is restricted by the stop ring 17 fitted in the groove 13a of the second sleeve 13.
And a C-ring for stopping the bearing 18 fitted on the axle 14.
However, the assembly of the stop ring 17 is carried out by fitting the stop ring 17 into the groove portion 13a of the second sleeve 13 in which the first sleeve 12 is set, in this state. The second sleeve 13 is formed by spline-fitting the axle 14 with the second sleeve 13. That is, a convex portion 14a having an inclined surface is formed on the outer circumference of the inner end of the axle 14, and at the time of spline fitting of the axle 14, the stop ring 17 is guided by the inclined surface and rides over the convex portion 14a. Thus, the stop ring 17 can be attached, and the movement of the axle 14 to the drive sprocket 16 side with respect to the second sleeve 13 is restricted.

In addition, when removing the stop ring 17, attach the second sleeve 13 to the axle.
With the second sleeve removed from the drive shaft 11 together with 14,
The tip of a tool inserted through the opening of the drive shaft 11 of 13 is inserted into the slit 14b formed on the axle 14 so that the tool 14 is locked outside the stop ring 17, and the axle 14 is pulled in this state. In this case, the stop ring 17 is configured to get over the convex portion 14a and come off.

On the other hand, 20 is a fixed cylinder fixedly mounted on the transmission case 10 so as to be fitted on the drive shaft 11 at a predetermined interval, and the first movable cylinder 21 is fitted on the fixed cylinder 20. The second movable cylinder 22 is further fitted to the first movable cylinder 21 to form a cover cylinder that is expandable and contractible. The inner peripheral surface of the first movable cylinder 21 and the fixed cylinder are
The thrust ring 23 is located between the outer peripheral surface of 20 and the first movable cylinder.
The thrust ring 23 is interposed in the C-ring 21a so as to be fixed to the transmission case 10 side from the thrust receiving portion 23b in which the O-ring 23a is fitted. Extension part 23 that is elongated in the direction of the core and is cylindrical
c is formed. And the inner peripheral surface of this extension 23c is
The first movable cylinder 21 has a structure in which there is a slight gap from the outer peripheral surface of the fixed cylinder 20, and the first movable cylinder 21 is a transmission case 10.
When moving to the side, the mud adhered to the outer periphery of the fixed cylinder 20 is effectively scraped off to prevent intrusion into the inside. Reference numeral 21b is an O-ring externally fitted to the first movable cylinder 21 to ensure airtightness with the second movable cylinder 22, and 22a is formed for inserting a tool when removing the O-ring 21b. This is the perforation of the second movable cylinder 22.

On the other hand, the hydraulic cylinder 9 is the body frame as described above.
Although it is provided between 1a and the traveling frame 8,
The machine frame 1a side of the hydraulic cylinder 9 is swingably connected in the vertical direction, and the traveling frame 8 side is detachably connected by inserting and removing the pin 24. And the pin 24 above
Can be used as a jack for lifting the traveling machine body 1 by attaching the seat plate 25 to the end portion and extending the hydraulic cylinder 9 while the hydraulic cylinder 9 is suspended. It has become possible to easily replace and clean the bottom of the machine.

Further, 26a is a scraper integrally projecting on the inner side surface of the crawlers 26 constituting the running bodies 6 and 7 at a predetermined interval, and the scraper 26a is a resin material having elasticity similar to the crawler 26. It is designed to be rotated by the crawler 26 during traveling of the machine body to come into contact with the mud attached to the bottom of the traveling machine body 1 and scrape them off.

In the embodiment of the present invention constructed as described above, when the traveling body 7 is moved to reduce the rutted distance, the second sleeve 13 is fitted into the fixed cylinder 20 as shown in FIG. However, since the second sleeve 13 is formed into a small-diameter tubular shape that is spline-coupled to the axle 14 and the first sleeve 12 at substantially the same radial position, the diameter of the fixed barrel 20 can be reduced accordingly, and The first movable cylinder 21 fitted on the fixed cylinder 20 and the second movable cylinder 22 fitted on the first movable cylinder 21 can also be formed to have a small diameter. Therefore, the diameter of the cover cylinder composed of the cylinders 20, 21, and 22 can be made small, and as a result, it is possible to significantly reduce the weight, or the ground clearance (the distance from the ground to the lower end of the cover cylinder). ) Can be secured, and the adhesion of mud to the cover cylinder can be reduced, and
Damage to the cover cylinder due to contact with the ground can be prevented as much as possible.

Further, the stop ring 17 for restricting the movement of the second sleeve 13 and the axle 14 in the axial direction may be fitted in the groove portion 13a of the second sleeve 13 when the second sleeve 13 is assembled to the axle 14. Axle 1 by overcoming the convex portion 14a by the guide of the inclined surface
Since it is configured to be automatically attached to 4, it is possible to omit the laborious assembling work of the retaining ring 17, and it is possible to significantly improve the assembling workability.

Further, since the movement restriction of the first sleeve 12 toward the drive sprocket 16 side is performed by the inner end of the axle 14, it is not necessary to provide a separate restriction member, and therefore it is possible to reduce the number of parts. The number of attaching steps can also be reduced.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the scraper described above is formed separately from the crawler 26, and the fitting hole 26 formed in the crawler 26 is formed.
It may be fitted and attached to b, and this has the advantage that only scraper 27 can be replaced if scraper 27 becomes worn or damaged.

[Advantages] In short, since the present invention is configured as described above, the second sleeve has a spline joint portion formed on the inner peripheral surface thereof for joining the first sleeve and the other shaft body at substantially the same diameter position. It can be made into a thin, tubular shape. Therefore, it is possible to reduce the outer diameter of the second sleeve, and as a result, it is possible to use a tubular body that fits these as small as possible, which leads to downsizing of parts. In addition to being able to significantly reduce the weight, it is possible to secure a large ground clearance (the distance from the ground to the lower end of the cylinder), which can reduce the adhesion of mud to the cylinder, and also the cylinder. It is possible to effectively prevent problems such as damage due to contact with the ground.

[Brief description of drawings]

1 shows an embodiment of a rut distance adjusting device for a working traveling 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 frame part, FIG. 3 is a cross-sectional view of an essential part showing a state where the moving traveling body is moved inward, FIG. 4 is a cross-sectional view of an essential part showing a state where the moving traveling body is moved to the outside, and FIG. 5 is a cross-sectional view of a crawler, FIG. 6 is a perspective view of an essential part showing another example. In the figure, 1 is a traveling body, 6 and 7 are traveling bodies, 11 is a drive shaft, 14
Is an axle, 12 is a first sleeve, 13 is a second sleeve, 20 is a fixed cylinder, 21 is a first movable cylinder, 22 is a second movable cylinder, and A, B and C are spline coupling portions.

Claims (1)

[Scope of utility model registration request] 1. A working traveling machine body comprising a drive shaft body on the transmission side and an axle body on the traveling wheel side fitted externally on the drive shaft body so as to be movable in an axial center direction so that a rut distance can be adjusted. A first sleeve in which the inner peripheral surface of the drive shaft and the axle is spline-coupled to the outer periphery of one of the small-diameter side shafts such that the inner peripheral surface is axially movable, and the first sleeve and the other large sleeve. The inner peripheral surface is interlockingly connected to the outer peripheral surface of the radial side shaft body through second sleeves that are respectively spline-joined,
A rut distance adjusting device for a working vehicle body, wherein a spline coupling portion of the second sleeve with the first sleeve and the other shaft body is positioned at substantially the same diameter position.