JPH06304Y2 - 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 working machine body provided with a crawler type traveling body such as a combine.

[Problems to be Solved by Prior Art and Invention] Generally, in a traveling vehicle provided with this type of crawler type traveling body, for example, when this is a combine, it is usually performed during dividing work or ridge work. In the work, the traveling body located on the side of the cut land 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, for example, Kaisho 61-571
No. 7, which is known. By the way, in such a case, it is conceivable that the axle of the moving-side traveling body is interlockingly connected by a spline fitting method so as to be movable in the axial direction with respect to the output shaft of the machine body side. In this case, the lubrication of the spline fitting portion becomes a problem. Therefore, as shown in FIG. 9, the fixed cylindrical body 22 on the machine body side
It is considered that a bellows-like sheet material 30 which is expandable and contractable is provided between the movable cylinder 23 and the movable cylindrical body 23 on which the axle 21 is rotatably supported, and the lubricating oil is filled therein. It is not possible to increase the number of parts due to the need for a separate material, and there is the problem of poor maintainability. Therefore, it is conceivable to seal the contact surface portion between the fixed cylinder and the movable cylinder body and the contact surface portion between the movable cylinder body and the axle to form a lubricating oil chamber, but in this case, the axle side serves as the output shaft. On the other hand, when misalignment occurs, misalignment also occurs in each of the contact surface parts, and as a result, an unreasonable load is applied to the seal part, the sealing effect is lost at an early stage, and lubricating oil leaks from here. However, if the seal part is rigidly configured to withstand misalignment, there is a drawback that the load due to misalignment acts on the contact surface part and the traveling body cannot be moved smoothly. Become.

[Means for Solving 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. At least one axle of the left and right crawler type traveling bodies is spline-fitted to the output shaft of the machine body side so as to be movable in the left and right directions so that the distance between the left and right traveling bodies can be adjusted steplessly. In a traveling machine for work, a fixed cylinder having a lubricating oil chamber for the spline fitting portion protruding from the machine body side and having the output shaft rotatably supported via a bearing, and the fixed cylinder. A movable cylindrical body that is movably fitted in the axial direction through a seal portion, and the axle is rotatably supported by a bearing, and is a fixed cylindrical body or a movable cylindrical body. Axial axis between body and bearing At least one of the contact surface portions that does not move in the opposite direction is characterized by being configured as a spherical seal that absorbs the misalignment of the axle with respect to the output shaft while sealing.

The present invention is capable of steplessly adjusting the rutted distance by this structure, and absorbs the misalignment of the axle with respect to the output shaft to absorb the lubricating oil from the contact surface portion. The leak is prevented for a long period of time, and the traveling body can be moved smoothly.

[Embodiment] Next, one 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 performs pretreatment such as cutting stems. A pre-processing unit 2, a threshing unit 3 for threshing cut culms, a post-processing unit 4 for post-processing such as shredding culms, and a grain for storing selected grains in a grain bag It is the same as that of the related art in that it is configured by the grain container 5 and the like.

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 integrally assembled to a machine body frame described later via a support frame 6a, and the outer edge of the crawler 6b is provided on the uncut side divider 2 of the pretreatment unit 2.
The position of the grass in a is almost the same. On the other hand, the already-cut land side (moving side) traveling body 7 is composed of a drive wheel 7a, a rolling wheel 7b, and an idler 7c, which will be described later. The traveling frame has the rolling wheel 7b pivotally attached thereto. The mounting frame 8 and the supporting frame 9 extending upward from the front and rear portions of the mounting frame 8 and the auxiliary frame 10 connecting the front and rear supporting frames 9 have an integral frame structure. On the other hand, the body frame is composed of a pair of left and right vertical frames 11 facing the front-rear direction and the vertical frame 1
The frame is formed by a pair of front and rear horizontal frames 12 which are interposed between the horizontal frame 12 and the horizontal frame 12.
Is a one in which a pair of substantially U-shaped mold members 12a are arranged side by side so that the openings are opposed to each other, and the upper side and the lower side are connected by a connecting plate 12b, respectively. The side connecting plate 12b is notched in a half portion on the side of the cut land, and thus a guide rail portion is formed on the side of the lateral frame 12 on the cut land.

On the other hand, among the support frames 9, the already-cut-ground side traveling body 7
Each of the traveling frames 14 facing the left-right direction is integrally attached to the upper end of the one (in the embodiment, the one on the uncut land side traveling body 6 is integrally fixed to the lateral frame 12). A pair of right and left rollers 15 are supported on the traveling frame 14, respectively. The traveling frame 14 is fitted into the guide rail portion formed on the lateral frame 12 so that the roller 15 travels on the inner surface of the die member 12a, whereby the roller 15 rolls on the upper surface of the guide rail portion and receives the weight of the machine body. In this state, the cut land side traveling body 7 is movable in the left and right directions. Moreover, this is a substantially L-shaped auxiliary guide 12c on the lower surface of the mold material 12a.
Are provided before and after. The misalignment prevention roller 15 provided on the support frame 9 rolls the auxiliary guide 12c to prevent misalignment in the front-rear direction with a light burden.

Further, the mounting frame 8 is provided with upper and lower crawler guides 17 and 17a which are inserted between the left and right locking claws 16a formed on the inner surface of the crawler 16, and the auxiliary frame 1 is also provided.
1 is provided with a crawler guide 18 formed so as to embrace the upper side of the crawler 16 from the upper side, and when the traveling body 7 moves in the left-right direction, the crawler 16 is positively held. The crawler 16 is configured to follow the movement of the crawler 16 and prevent the crawler 16 from shifting.

Reference numeral 19 denotes a transmission case, and a drive shaft (corresponding to the output shaft of the present invention) 19a extending from the transmission case 19 has a spline shaft 19 at its tip.
b, but on the outer circumference of this spline shaft 19b,
The inner peripheral surface of the first intermediate spline cylinder shaft (first sleeve) 20 is spline-fitted A so as to be slidable in the axial direction. Further, on the outer peripheral surface of the first intermediate spline cylinder shaft 20, the inner inner peripheral surface on the transmission case 19 side of the second intermediate spline cylinder shaft (second sleeve) 20a is not moved in the axial direction by the stop ring 20b. Although the spline fitting B is carried out in a regulated state, the outer peripheral surface of the tubular axle shaft 21 is similarly regulated to move in the axial direction on the outer inner peripheral surface of the second intermediate spline cylindrical shaft 20a. The spline fitting C is in the state. The inner peripheral surface of the axle 21 is loosely fitted to the outer peripheral surface of the spline shaft 19b with a slight clearance, and the drive wheel 7a is integrally fixed to the outer end thereof.

22 is integrally assembled from the transmission case 19 so as to be hermetically sealed via a sealing material 19c, and the spline shaft 19 at the tip of the drive shaft 19a.
It is a case body formed so as to surround the intermediate portion before reaching b. In the lubricating oil chamber A, which will be described later, including the case body 22, the spline fitting portions A are provided independently of the transmission case 19. It is filled with a lubricating oil that lubricates ~ C. The bearing 22 is provided in the middle of the outer side of the case body 22.
A fixed cylinder 22b is provided so as to support a, and the inner end of the movable cylinder 23 is hermetically sealed on the outer peripheral surface of the fixed cylinder 22b via a seal member 23a. It is fitted so that it can slide in the axial direction. An outer peripheral surface 21 of a bracket 21b rotatably attached to the axle 21 via a bearing 21a is provided on an inner peripheral surface of an outer end portion of the movable cylindrical body 23.
When d is in sliding contact with the stop ring 21c in a state where movement in the axial direction is restricted, but the outer peripheral surface 21d of the bracket 21b has an arc shape and there is a misalignment between the spline shaft 19b and the axle 21. The center of the arc-shaped outer peripheral surface 21d is O-
The ring 21e is fitted, and thus the contact surfaces have a spherical seal structure.

Next, the moving mechanism of the traveling body 7 will be described. This moving mechanism is provided between the left and right auxiliary frames 10, and the rear ends of the link rods 24 and 25 pivotally supported by a pin 26 in the middle are the left and right auxiliary frames 1.
0 is integrally pivotally supported on the rear side of pin 0 via pins 24a and 25a, respectively. On the other hand, rollers 24b and 25b are supported on the front ends of the link rods 24 and 25, and these rollers 24b and 25b are respectively supported by guides 10a provided on the front side of the left and right auxiliary frames 10 so as to be rollable in the front-rear direction. Has been done. Further, reference numeral 27 is a rudder distance adjusting cylinder, and the rudder distance adjusting cylinder 27 has one end on the uncut ground side auxiliary frame 10 and the other end over the pin 26, and a pin 27a on the link rod 24. , 27b, respectively. Then, the traveling body 7 is moved in the left-right direction by changing the swinging posture about the pin 26 of the link rods 24 and 25 as a pivot, which follows the expansion and contraction of the rudder distance adjusting cylinder 27.

In the embodiment of the present invention configured as described above, when performing split work or ridge work, the traveling body 7 is moved inward by expanding and contracting the cylinder 27 for adjusting the rut distance. By reducing the distance between the running bodies 6 and 7 and aligning the outer edge of the cut-side land-side running body 7 with the weeding position of the cut-side land side divider 2a, or by locating the inside edge thereof, the running body 7
There is no problem of trampling uncut grass culms or riding on ridges, and it is possible to perform orderly harvesting work smoothly. In addition, when carrying out normal work, the traveling body 7 is moved to the outermost side for a wide and stable operation. Harvesting can be performed as a rut distance.

In the case where the present invention is implemented as described above, the traveling body 7
Can be moved in the left-right direction to adjust the rutted distance. In that case, the drive wheel 7
The power transmission from the drive shaft 19 to the axle 21 is interlocked by the spline fitting portion so that the power transmission to the a can be moved in the axial direction. In this one, the axle 2
On the first side, when the traveling body 7 is adjusted for movement, various factors such as the weight of the machine body and unevenness of the field act in addition to the load at the time of movement, so that the center of the drive shaft 19 is decentered. It may happen. However, in the case where the present invention is implemented, even if a temporary misalignment occurs, each seal portion can be reliably protected and the leakage of lubricating oil can be reliably prevented.

That is, in the embodiment of the present invention, the axle shaft 21 is configured to be movable in the left-right direction by the spline fittings A to C with respect to the drive shaft 19a, but to form a lubricating oil chamber for the spline fitting portion. , Fixed cylinder 22b and movable cylinder 23
The sliding contact surface portion with and the contact surface portion between the movable cylindrical body 23 and the axle side bracket 21d are sealed. However, in the case where a misalignment occurs on the axle 21 side, in the embodiment, the movable cylindrical body 23 is in surface contact with the arcuate outer peripheral surface 21d of the axle side bracket 21b that does not move relatively in the axial direction and is absorbed there. Therefore, the fixed cylinder body 22b and the movable cylinder body 23 are maintained in the concentric state even if there is a misalignment on the axle 21 side, and the seal member 23a provided between the contact surfaces of the two is maintained. It is possible to effectively avoid the application of an eccentric load due to the misalignment. Moreover, since the spherical seal portion does not move relative to each other in the axial direction, there is no problem such that the mud is trapped as in the case where the spherical seal is provided at the portion moving in the axial direction. As a result, it is possible to prevent the seal member 23a from being damaged at an early stage, maintain a lubricating oil chamber that does not leak for a long time, and achieve reliable lubrication of the spline fitting portion. Moreover, since the portion that absorbs the misalignment has a spherical seal structure in which the O-ring 21e is provided in addition to the arc shape, even if there is alignment for absorbing the misalignment, Since the seal is ensured, the leakage of lubricating oil from here can be effectively prevented.

Further, in the embodiment, the drive shaft 19a and the axle shaft 21 are configured so as to be movable in the axial direction by spline fitting, but the spline fitting is not performed at one place as in the conventional case but is performed at A to C. For convenience, there are three locations, so when the axle 21 is misaligned, this misalignment can be dispersed and absorbed by the spline fitting portions at multiple locations. There is an advantage that the countermeasure for the misalignment can be sufficiently dealt with, and the problem caused by the misalignment can be more effectively avoided.

Moreover, since the lubricating oil chamber for lubricating the spline fitting portions A to C is filled in a room independent of the transmission case 19, a dedicated lubricating oil suitable for the spline fitting portion for high torque transmission is supplied. Besides, there is an advantage that the lubricating oil can be replaced independently when necessary, and even if the lubricating oil leaks, this will not adversely affect the lubrication of the transmission.

The present invention is not limited to the above-mentioned embodiment, but may be constructed as a second embodiment shown in FIG. 8, for example. That is, this is one in which the contact surface portion 22c between the fixed cylindrical body 22b and the case body 22 fixed to the machine body has a spherical seal structure, but in this case, when the axle 21 side is misaligned, The movable cylindrical body 23 and the fixed cylindrical body 22b are eccentric integrally with the movable cylindrical body 23 and the fixed cylindrical body 22b to absorb misalignment.
Even in this way, it can be implemented.

[Advantages] In short, since the present invention is configured as described above, the axle is spline-fitted to the output shaft on the machine body side on the moving traveling body side for adjusting the rutted distance. Although the horizontal movement is adjustable, the lubricating oil chamber for this spline fitting part is composed of a fixed cylinder and a movable cylinder that are rotatably supported by the output shaft or axle via bearings. The contact surfaces of these cylinders and bearings do not move in the axial direction, but at least one of them is composed of a spherical seal, and the core is located on the axle side with respect to the output shaft. When the misalignment occurs, the misalignment does not move in the axial direction, so that the mud that adheres to the outer peripheral surface is absorbed by the contact surface part that is easy to prevent from being caught. Both moving relative to the core direction It is possible to reliably avoid the influence of misalignment on the seal portion between the cylinders.

As a result, the seal structure between the two cylinders corresponds only to the relative movement of both cylinders in the axial direction, and there is no need to consider the misalignment. There is no need to take a strict measure against the trapping of mud that adheres to the outer peripheral surface of the cylinder, as in the case where it is necessary to do so, and even if the structure is simple, the sealing performance will be impaired at an early stage. Can be reliably avoided and can be made highly durable.

[Brief description of drawings]

1 shows an embodiment of a rut distance adjusting device in a working vehicle according to the present invention. FIG. 1 is an overall front view of a combine, FIG. 2 is a front view of the same, and FIG. Is a front sectional view of the traveling body, FIG. 4 is a schematic side view of the traveling body, and FIG.
FIG. 6 is an explanatory view showing the operation state of the traveling body, FIG. 6 is a vertical cross-sectional view of the drive wheel portion, FIG. 7 is a plan view of a main portion of the traveling body, and FIG. 8 is a drive wheel portion showing the second embodiment. FIG. 9 is a vertical sectional view of the proposed drive wheel portion. In the figure, 1 is a traveling body, 6 and 7 are traveling bodies, 7a is driving wheels,
19 is a transmission case, 19a is a drive shaft, 1
9b is a spline shaft, 21 is an axle, 21d is a spherical outer peripheral surface, 21e is an O-ring, 22 is a case body, 22b is a fixed cylinder body, and 23 is a movable cylinder body.

Claims (1)

[Scope of utility model registration request] 1. A rut distance between left and right traveling bodies can be adjusted steplessly by spline-fitting at least one axle of the left and right crawler-type traveling bodies to an output shaft on the side of the machine body so as to be movable in the left-right direction. In the traveling machine for work as described above, a lubricating oil chamber for the spline fitting portion is provided so as to project from the machine body side, and the output shaft is rotatably supported via a bearing, and The movable cylinder body is fitted to the fixed cylinder body so as to be movable in the axial direction through the seal portion, and the axle is rotatably supported by bearings. Alternatively, at least one of the contact surface portions that do not move in the axial direction of the movable cylinder and the bearing is configured by a spherical seal that absorbs the axial misalignment of the axle with respect to the output shaft while sealing it. For the characteristic work machine Inter-kicking rut distance adjustment device. 2. The rutter distance adjusting device for a working traveling vehicle according to claim 1, wherein the spline fitting portion is configured by a plurality of spline fittings. 3. The rutter distance adjusting device for a traveling machine body for work according to claim 1, wherein the lubricating oil chamber is provided independently of other lubricating parts.