JP2002284051A - Traveling device for service vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an traveling device for a service vehicle capable of easily arranging and constructing a lifting/lowering driving link mechanism and the like for a lifting/lowering traveling device without requiring any device avoiding interference with another apparatus. SOLUTION: In a right side crawler device 1, a track frame 17, to which a plurality of ground rolling wheels 10 are journalled freely rotationally, can be driven to be lifted/lowered to a traveling machine body 2, and a movable side track frame 17 can be freely lifted/lowered in parallel by means of a pair of front and rear driving arms 18 and 18. For arranging fulcrum shafts for the driving arms 18 and 18, two lateral connection frames 9 each connected between machine body longitudinal left and right main frames 7 and 7 are arranged on the front and rear side individually, and the fulcrum shafts for the driving arms 18 and 18 are arranged between the front connection frame 9 and the rear connection frame 9 positioned on the front and rear sides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for a working vehicle used for a combine or the like.

[0002]

2. Description of the Related Art Conventionally, a traveling apparatus is provided with a connecting frame having a laterally oriented posture to form a frame structure by connecting a pair of left and right main frames which are set in a longitudinally oriented posture of a traveling body. A track frame is fixed to the left and right ends of the frame, and a plurality of grounded wheels are freely rotatably supported on the track frame (for example, JP-A-10-329766).

[0003]

In the above construction, since the traveling device is fixedly mounted on the traveling machine so as not to be able to ascend and descend, if there is a local uneven surface on the field surface, the uneven surface may be removed. When the traveling apparatus is fitted and the traveling body is tilted to one side, the workability such as crop harvesting performance is deteriorated. Therefore, it is considered that the traveling apparatus is moved up and down with respect to the traveling body. However, there is a problem in what state the drive mechanism for driving the traveling device up and down with respect to the traveling body is arranged. That is, in the case of the above configuration, a connecting frame in a left-right orientation connecting the left and right main frames is provided, and the track frame is fixed to the connecting frame, so that the traveling device can be moved up and down. It is necessary to release the fixed state between the connecting frame and the track frame and separate them, but after separating, it is desired to construct a configuration in which the connecting frame is effectively used to drive the traveling device up and down. SUMMARY OF THE INVENTION It is an object of the present invention to provide a traveling device for a working vehicle with a reduced manufacturing design load, by using a connecting frame that is connected to a main frame and serving as a strength member to constitute a lifting / lowering drive structure of the traveling device. It is in.

[0004]

According to a first aspect of the present invention, at least one of a pair of left and right traveling devices is configured as a lifting and lowering traveling device capable of driving up and down with respect to a traveling body. Providing the traveling body with a left and right main frame having a body longitudinal direction and a lateral connecting frame connected to the left and right main frames, and installing the lateral connecting frame at two longitudinal directions of the traveling body, The fulcrum axes of the two drive arms arranged in front and rear to drive the traveling device up and down are positioned on the rear side of the front connection frame located in front of the horizontal connection frames and on the rear side of the horizontal connection frames. It is provided on the front side of the rear connecting frame, and its operation and effect are as follows. [Operation] In order to construct a lift device that moves up and down with respect to a traveling machine body, how to arrange and configure a drive arm that drives the lift device becomes a problem. If the fulcrum axis of the front drive arm located on the front side is located further forward than the front connection frame located on the front side, the rear drive arm provided behind the drive arm located on the front side and the front drive arm are linked. The presence of the front connection frame is an obstacle to installing the link rod and the like. With this in mind,
The fulcrum shaft of the front-rear drive arm is provided on the rear side of the front connection frame and on the front side of the rear connection frame located on the rear side. Thus, a mechanism for driving and connecting the front and rear drive arms can be arranged and configured without being disturbed by the front and rear connection frames. [Effect] Therefore, the mechanism for connecting the two drive arms can be easily and easily arranged and configured while effectively utilizing the empty space formed in the front-rear space of the connection frame arranged in front and rear, and the And the burden on design can be reduced.

According to a second aspect of the present invention, at least one of a pair of left and right traveling devices is configured as a lifting / lowering traveling device capable of driving up / down with respect to the traveling vehicle body, and the traveling vehicle body is configured. The fulcrum shaft of a drive arm for vertically moving the lifting and lowering device is mounted and provided on a laterally connected frame that is connected and supported across the left and right main frames in the body front and rear posture. It is as follows. [Effects] In other words, in order to configure a lifting and lowering traveling device that moves up and down with respect to the traveling vehicle body, to select a mounting target of a drive arm that drives the lifting and lowering traveling device, a horizontal connecting frame to which a conventional track frame is fixed is used. By paying attention, it will be attached to this horizontal connection frame.
Thereby, the traveling device is supported even when the traveling device is changed to be capable of driving up and down the horizontal connecting frame having strength enough to mount and support the track frame that conventionally supports the grounding wheel. Available for mechanism. Therefore, a new supporting mechanism is not required, and the horizontal connection frame can be effectively used.

[Structure] According to a third aspect of the present invention, in the invention according to the first or second aspect, the pair of left and right traveling devices is configured as a crawler type, and the lifting / lowering traveling device is mounted on a traveling body. A driving wheel supported in a state in which the driving wheel does not move up and down, and a plurality of grounding wheels that are supported by a track frame and are capable of driving up and down relative to the driving wheel together with the track frame. The effects are as follows. [Effects] In other words, in the configuration of the elevating traveling device, the configuration in which the track frame provided with the plurality of ground wheels is operated to elevate and lower allows the drive sprocket position to be maintained even when the elevating traveling device sinks in the field. Since it can be positioned near or higher than the surface, it is easier to escape from the submerged state.

[Structure] The characteristic feature of the invention according to claim 4 is that, in the invention according to claim 3, the guide wheel provided in the return path of the crawler type elevating traveling device is supported so that the track frame can be driven up and down. The supporting arm of the drive arm is freely rotatably supported by the fulcrum bearing, and its operation and effect are as follows. [Function and effect] In other words, since the guide wheel can be supported by using the fulcrum bearing portion provided with sufficient strength to support the drive arm, a separate support position for the guide wheel is selected. There is no necessity, and the simplification of the structure can be achieved by the dual use.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a planted grain culm is raised and a harvested grain culm is mounted on the traveling body 2 in front of a traveling machine body 2 traveling by a pair of left and right crawler traveling devices 1, 1. A cutting pre-processing unit 5 is provided to feed the threshing device 3 to the thruster 3, and a driving control unit 4 and a rear portion of the driving control unit 4 are provided at a portion of the traveling machine body 2 opposite to the mounting side of the threshing device 3. The grain storage unit 6 is arranged to constitute a combine as a working vehicle.

Next, the crawler traveling device 1 will be described. As shown in FIG. 2, the crawler traveling device 1 is an elevating type that lifts and lowers the crawler traveling device 1 located on the right side of the traveling aircraft 1 on which the driving control unit 4 and the grain storage unit 6 are installed with respect to the traveling aircraft 2. In addition to being configured as a crawler traveling device (an example of an elevating traveling device), as shown in FIG. 3, the crawler traveling device 1 located on the left side is configured as a fixed crawler traveling device 1 that does not move up and down with respect to the traveling machine body 2.

The fixed crawler traveling device 1 will be described. As shown in FIGS. 3 to 5, as the frame structure of the traveling body 2, left and right main frames 7, 7 made of square pipes are disposed inside the left and right crawler traveling devices 1, 1 in a front-rear direction, and A frame 8 in which strength member members are assembled vertically and horizontally is attached to the upper surface of 7,7. Below the left and right main frames 7,7, connecting frames 9,9 in a lateral orientation are arranged at two places in the longitudinal direction of the body, and are connected to the left and right main frames 7,7.

As shown in FIGS. 4 and 5, the horizontal connecting frames 9, 9 include a front connecting frame 9 located on the front side in the longitudinal direction of the fuselage and a rear connecting frame 9 located behind the front connecting frame 9. It is a hollow frame having a rectangular cross section with an intermediate portion bent in an inverted U-shape closer to the left and right main frames 7, 7 than at the left and right end portions. The fixed crawler traveling device 1 is attached to the left end of the front and rear connection frames 9, 9, and the configuration of the fixed crawler traveling device 1 will be described before describing the mounting structure.

As shown in FIG. 3, a plurality of grounding wheels 10
A stationary track frame 11 in a front-rear position, which freely rotates, is arranged, and the fixed track frame 11 is formed of a square pipe. One end of the front connection frame 9 is fixedly connected to the front end of the fixed track frame 11. The bracket 12 extends forward from the front connection frame 9, and the drive sprocket 13 is supported by the bracket 12. I have.

On the other hand, as shown in FIG. 4, at the rear end of the fixed track frame 11, there is provided a moving frame 11A which is located within the rear end of the fixed track frame 11 and moves backward and backward. The tension sprocket 14 is provided on the moving frame 11A. A screw-type adjusting mechanism is bridged between the fixed track frame 11 and the moving frame 11A, and the tension can be adjusted by sliding the screw with a screw. Between each ground contact wheel 10,
A belt presser 15 fixed to the fixed track frame 11 is provided, and is configured to press against the inner surface of the belt together with the ground wheel 10.

The mounting structure of the ground wheel 10 will be described. As shown in FIG. 5, FIG. 6 and FIG.
A rectangular tubular support boss 11B is attached and fixed to the lower surface in a posture orthogonal to the axial direction of the support shaft 29, and the support shaft 29 that does not rotate from the support boss 11B is projected outward. The grounding wheel 10 is externally fitted and fixed via a seal material 31 so that the grounding wheel 10 is
9 is freely rotatable. As shown in FIG. 6, a U-shaped cross-section reinforcing frame 16 is fixed between the support bosses 11B in order to firmly configure the support bosses 11B provided at four positions along the axis of the fixed track frame 11. The lower track frame 11 is fixed to the lower surface of the side track frame 11 in contact with the lower surface of the track frame 11 along the axis thereof. Accordingly, the support bosses 11 </ b> B can be firmly connected by the U-shaped cross-section reinforcing frame 16, and the connection with the fixed-side track frame 11 can be also strong. A reinforcing rod 44 having a substantially U-shaped cross section is provided over the side surface of the fixed track frame 11 and the rectangular tubular support boss 11B, and the support boss 11B and the like are also reinforced by the reinforcement rod 44. I have.

As shown in FIG. 7, a sealing plate 32 made of sheet metal is provided at the outer end of the boss 10B of the ground wheel 10 to maintain the grease oil sealed in the boss 10B. It is configured to do so. A grease nipple 33 is provided on the enclosing plate 32. The grease nipple 33 secures a screw 34 for mounting the grease nipple 33 by caulking and fixing a nut 34 to the enclosing plate 32, and facilitates processing. I have to.

The left ends of the front and rear connection frames 9, 9 are connected and fixed to the fixed track frame 11, and the connection frames 9, 9 and the fixed track frame 11 are integrated to form a structure having high strength. .

Next, the movable crawler traveling device 1 will be described. As shown in FIG. 2, the drive sprocket 13 is attached to the traveling body 2 in the same manner as the fixed crawler traveling device 1. The mounting structure of the tension sprocket 14, the ground contact wheel 10, and the belt retainer 15 to the movable track frame 17 is as follows.
1 is the same as the mounting structure. Also, the reinforcing frame 16
And the provision of the reinforcing rods 44 also makes the fixed track frame 1
Same as 1. The U-shaped cross-section reinforcing frame 16 and the reinforcing rod 44 applied to the fixed side track frame 11 are also provided.
Is also applied to the movable track frame 17. Such a U-shaped cross-section reinforcing frame 16 and the reinforcing rod 4
Regarding 4, especially since the movable track frame is not directly fixed to the connecting frame 9, there is a great significance in reinforcing with the reinforcing frame 16 or the like.

The structure of the driving device A for driving the movable track frame 17 up and down is as follows. As shown in FIG. 2, the lifting drive device A includes a pair of front and rear drive arms 1 that drive the movable track frame 17 up and down in parallel.
A parallel quadruple link mechanism is constituted by a pair of front and rear drive arms 18, 18, and a connecting rod 19 for linking the pair of front and rear drive arms 18, and a drive rod 20 is connected to the upper end position of the rear drive arm 18. Are driven and driven by the drive cylinder 21.

The mounting structure of the front / rear drive arm 18 will be described. As shown in FIGS. 2 and 4, the drive arm is swingably supported by a boss member 22 attached to the inverted U-shaped front-rear connection frame 9, and is supported and held by the boss member 22. A rotating shaft 18C that rotates around the axis of the shaft 22, an inner upper arm 18A attached to the inner end 18a of the rotating shaft 18C that projects from the boss member 22, and a rotating shaft 18C that projects outside the boss member 22. And an outer lower arm 18B attached to an outer end portion 18b of the lower arm. The connecting rod 1 described above is used for the inner upper arm 18A.
The movable track frame 17 is connected to the distal end of the outer lower arm 18B so as to be relatively swingable.

As shown in FIG. 6, the inner upper arm 18A
And the inner end 18a of the rectangular cross section of the rotating shaft 18C are fixed by welding after being mounted, and the outer lower arm 18B is connected to the rotating shaft 1C.
The outer end 18b of the 8C is externally fitted to a mounting section having a rectangular cross section, and is configured to be integrally rotatable with the rotating shaft 18C. Rotary shaft 18C
A bush 23 is externally fitted to the outer end portion 18b, and is located at a contact portion with the outer lower arm 18B, thereby stably mounting the outer lower arm 18B and the rotating shaft 18C. As described above, the inner end 1 of the rotating shaft 18C
8a and the inner upper arm 18A are welded in a state where they are non-rotatably fitted by a square cross section, so that the connection mounting work is easy. The outer lower arm 18B and the rotating shaft 18C
Since the mounting structure using a square cross section is adopted, it is easier to match the phases of the outer lower arm 18B and the inner upper arm 18A than in the case where the conventional spline fitting structure is adopted. .

As shown in FIG. 2 and the like, at the intermediate position between the track frames 11 and 17, there is provided a vertically rotatable movable rolling wheel 10A urged against the crawler belt 24 by an urging spring. In addition, the crawler belt 24 can easily get over even if there are protrusions or the like. The grounding wheel body 10 is configured as an outer wheel type in which the left and right flanges 10a are located outside the metal core projections 24A, 24A of the crawler belt 24, and the movable rolling wheel 10A is located between the metal core projections 24A, 24A. The inner wheel type is located at.

The mounting structure of the guide wheel 25 for guiding the belt 24 on the return path side of the crawler belt 24 will be described first, starting from the guide wheel 25 in the lift type crawler traveling device 1. As shown in FIGS. 8 and 9,
Regarding the mounting of the drive arm 18 to the inverted U-shaped rear connection frame 9 so as to swingably support the movable track frame 17, a channel-shaped bracket 26 is mounted on the front surface of the right end of the rear connection frame 9, The boss member 22 is fixed to the bracket 26, and the boss member 22 rotatably supports the rotation shaft 18C. A plate-like frame 27 attached to the right end of the rear connection frame 9 and the right end of the bracket 26 is provided to project further forward than the bracket 26, and the front end of the plate-like frame 27 is formed as a connection receiving portion 27A. The wheel support shaft 28 extends laterally outward from the connection receiving portion 27A. The wheel support shaft 28 is configured as a round shaft whose diameter gradually decreases toward the tip end, and supports the guide wheel 25 on the wheel body 28 in a freely rotatable manner. As described above, the mounting structure of the guide wheel 25 can be constructed by using the bracket 26 and the like provided for supporting the drive arm 18, and a structure having high strength can be easily achieved. In addition, since the guide wheel 25 can be arranged near the pivot shaft of the movable track frame 17, the movable track frame 17 that moves up and down and the guide wheel 25 are less likely to interfere with each other.

The mounting structure of the guide wheel 25 in the fixed crawler traveling device 1 on the side where the lifting / lowering operation is not performed has substantially the same configuration. As shown in FIG. 10, the right end of the inverted U-shaped connecting frame 9 is used. Track frame 11 with fixed part
The plate-like frame 27 for mounting the wheel support shaft 28 and the connection receiving portion 27A are slightly connected to the fixed U-shaped connection frame 9 from the connection portion with the fixed-side track frame 11. The difference is that it extends forward on the inside.

As shown in FIGS. 2 and 4, the drive arm 18 before and after driving the movable track frame 17 up and down,
Numerals 18 are attached to the right ends of the front and rear inverted U-shaped connecting frames 9, respectively.
Boss members 22, 22 for supporting 8C, 18C are attached as follows. That is, the front boss member 22 supporting the front drive arm 18 is mounted on the rearward surface of the front connection frame 9, and the rear boss member 22 supporting the rear drive arm 18 is mounted on the front surface of the rear connection frame 9. is there.
With such a configuration, the arrangement of the drive cylinder 21, the drive rod 20, the connection rod 19, and the like for driving the movable track frame 17 up and down is avoided while avoiding interference with the connection frame 9 formed in an inverted U-shape. It is not necessary to pay attention to the arrangement configuration, and the connection relationship can be easily set.

An embodiment in which the movable track frame 17 is moved up and down to perform rolling control of the traveling body 2 will be described. As shown in FIG. 11, a horizontal sensor 41 for detecting the left-right inclination is mounted on the traveling body 2, and a control device 42 for controlling the rolling control valve 40 based on the detection result is provided. The operation time of the drive cylinder 21 is measured by the timer 43 to adjust the operation amount of the drive cylinder 21. This eliminates the need for a cylinder position sensor or the like and simplifies the control configuration. The expansion and contraction limit of the cylinder 21 is determined by integrating the amount of movement.

[Other Embodiments] (1) In the embodiment, the right traveling device 1 is configured to move up and down with respect to the traveling machine body 2, but only the left traveling device 1 is moved up and down. Alternatively, the left and right traveling devices 1 and 1 may be moved up and down respectively. (2) As the structure of the traveling device 1, a crawler type is adopted, but a multi-wheel type may be adopted. Further, when the traveling device 1 is configured as a lifting / lowering traveling device, the grounding rolling wheels 10
Although the track frame 17 supporting the moving device 1 is configured to be moved up and down, the whole of the traveling device 1 including the driving wheel body 13 may be moved up and down. (3) In the above embodiment, the connecting frames 9 and 9 are used to support the drive arm 18 that drives the movable track frame 17 up and down.
In addition, a dedicated support point may be provided. However, the position at which the support point is provided only needs to be provided within the interval between the front and rear connection frames 9 and 9. (4) As the structure of the connection frame 9, the intermediate portion is formed in an inverted U-shape located above both side ends, but is not necessarily limited to the inverted U-shape, and is not limited to a gate shape or a straight shape. May be formed.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a side view showing a movable crawler traveling device.

FIG. 3 is a side view showing a fixed crawler traveling device.

FIG. 4 is a plan view showing a left and right crawler traveling device.

FIG. 5 is a front view showing an attachment relationship between a rear connection frame and a track frame.

FIG. 6 is a front view showing a mounting state of the drive arm.

FIG. 7 is a vertical sectional front view showing a rotating pivot structure of a wheel;

FIG. 8 is a side view showing a mounting structure of a guide wheel body of the movable crawler traveling device.

FIG. 9 is a plan view showing a mounting structure of a guide wheel body of the movable crawler traveling device.

FIG. 10 is a plan view showing a mounting structure of a guide wheel body of the fixed crawler traveling device.

FIG. 11 is a configuration diagram of a lift control of a movable crawler traveling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling apparatus 2 Traveling body 7 Main frame 9 Connection frame 10 Ground contact wheel 13 Track frame 17 Movable track frame 18 Drive arm

Claims (4)

[Claims] At least one of a pair of left and right traveling devices is configured as a lifting / lowering traveling device capable of driving up / down with respect to a traveling vehicle body, and the traveling vehicle body has a left / right main frame and a left / right main frame in a body front-rear posture. And a horizontal connecting frame that is connected across the vehicle body, and the horizontal connecting frame is installed at two positions in the front-rear direction of the traveling body, and fulcrums of two drive arms arranged in front and rear to drive the lifting and lowering device up and down. The axis, on the rear side of the front connection frame located in front of the lateral connection frame,
In addition, a traveling device of a work vehicle provided on a front side of a rear connection frame located rearward of the lateral connection frame. 2. The vehicle according to claim 1, wherein at least one of the pair of right and left traveling devices is configured as a lifting and lowering traveling device capable of driving up and down with respect to the traveling vehicle body. A traveling device for a work vehicle, wherein a fulcrum shaft of a drive arm for driving the elevation device up and down is mounted on a laterally connected frame that is connected and supported. 3. A pair of left and right traveling devices are configured as a crawler type, and a lifting / lowering traveling device is provided with a driving wheel body supported so as not to be lifted / lowered with respect to the traveling body and a track frame supported by a track frame. The traveling device for a working vehicle according to claim 1 or 2, wherein the traveling device comprises a plurality of ground contact wheels that can be driven to move up and down relative to the driving wheel body together with the track frame. 4. A guide wheel provided on a return path of a crawler type elevating travel device is supported by a fulcrum bearing of a drive arm for supporting a track frame so as to be capable of ascending and descending freely. The traveling device of the working vehicle described in the above.