JP2002284053A - Traveling device for service vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traveling device for a service vehicle capable of reducing increase in manufacturing costs and the like by a compact structure matching a small-scale type machine in spite of usage of a traveling device capable of holding an attitude of a traveling machine body in a condition complying with a field surface even on the rough field surface for maintaining reaping performance and causing no deterioration in rectilinearity. SOLUTION: The traveling machine body 2 having a reaping pretreatment part 5 arranged in the front part is supported by means of a pair of left and right crawler traveling devices 1 and 1. In the traveling machine body 2, a threshing device 3 is arranged on one side, while an operation controlling part 4 is arranged on the other side, and behind it, a grain storage part 6 is arranged. A ground rolling wheel 10 in the right side crawler traveling device 1 positioned below the grain storage part 6 can be lifted/lowered freely to the traveling body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a traveling device for a working vehicle such as a combine.

[0002]

2. Description of the Related Art Conventionally, a traveling device for a working vehicle has been constructed by a conventional method.
For example, in a relatively small model such as a combine shown in Japanese Patent Application Laid-Open No. H10-329766, a main frame having a left-right front-rear posture is provided with two front-rear front-rear U-shaped left-right postures. A driving sprocket, a tension sprocket, and an idler wheel that fix a track frame to each of the left and right ends of the connecting frame while connecting the link frame to form a strong frame structure, and drive a crawler belt to the track frame. Are mounted to form a traveling device, and the traveling device is mounted so as not to move up and down with respect to the traveling machine body.

[0003]

As described above, in the vehicle equipped with the conventional traveling device, the traveling machine body is inclined with respect to the field surface due to local unevenness on the field surface.
There have been problems that the reaping is not performed uniformly and that the straight running performance is reduced. Therefore, there has been proposed a device having a structure in which the right and left traveling devices can be moved up and down relatively to the traveling body (for example, Japanese Patent Laid-Open No. 11-235118). The gist of this is that a track frame on which a plurality of idler wheels in left and right traveling devices are mounted can be moved up and down with respect to the traveling body, and the left and right track frames are set at different heights with respect to the traveling body. By doing so, the horizontal inclination of the traveling body with respect to the horizontal reference plane (or the field surface) or the like can be changed and set, and even if the traveling device is fitted into the local concave surface and the traveling body is inclined. On the other hand, there is a configuration in which the traveling machine body is re-established in a state parallel to the field surface by raising and lowering one traveling device, thereby improving the mowing workability and the traveling straightness. However, in the above-described configuration, since the left and right track frames are raised and lowered, the structure for lifting and lowering tends to be enlarged, and there has been a problem that it is difficult to adopt the structure for a small car. SUMMARY OF THE INVENTION It is an object of the present invention to provide a traveling device for a work vehicle that can employ an optimum structure for a small vehicle while improving workability and traveling straightness.

[0004]

According to a first aspect of the present invention, there is provided an elevating traveling device capable of vertically driving only one of the traveling devices with respect to a traveling body having a pair of left and right traveling devices. The operation and effect are as follows. [Function] Only one of the traveling devices is configured to be able to move up and down, and the height of the left and right traveling devices with respect to the traveling machine is set to be different by moving the traveling device up and down with respect to the traveling machine. Can be rolled. [Effects] Therefore, even if only one of the traveling devices is configured as a lifting and lowering device, the same rolling function as in the case where the left and right traveling devices are raised and lowered can be exhibited, and for that purpose, a design for operating the traveling device vertically. The production burden due to the change and the like can be stopped by the traveling device on only one side, and the production cost and the enlargement of the equipment can be suppressed.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided an elevating and lowering device which can move up and down with respect to the traveling body at one of the left and right sides of the traveling body. The operation control unit and the grain storage unit are provided on the side where the unit is located, and the operation and effect thereof are as follows. [Effects] In other words, as the harvesting work progresses, the amount of stored grains increases and becomes heavier, so that the traveling device on the side where the amount of sinking in the field becomes larger is operated by lifting and lowering. The amount of elevating can be determined based on the side with the smaller amount of sinking, so that the traveling body can be easily corrected to be along the field surface.

[Structure] The feature of the invention according to claim 3 is that, in the structure of the invention according to claim 1 or 2, the pair of left and right traveling devices is configured as a crawler type, and the traveling machine body is A lifting device driven up and down,
A drive wheel body supported in a state where it does not move up and down with respect to the traveling body, and a plurality of grounding wheels that can be driven up and down relative to the drive wheel body together with the track frame while being supported by a track frame. The operation and effect 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.

[0007]

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 so as to be fed into the threshing device 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 side where the threshing device 3 is mounted. 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 FIGS. 1 and 2, the crawler traveling device 1
The lifting crawler traveling device (an example of an elevating traveling device) that lifts and lowers the crawler traveling device 1 located on the right side of the traveling machine 1 in which the driving operation unit 4 and the grain storage unit 6 are installed with respect to the traveling machine 2. With the configuration, as shown in FIG.
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 FIG. 3 to FIG. 5 and the like, the left and right main frames 7, 7 made of square pipes in the front-rear posture inside the left and right crawler traveling devices 1, 1 are used as the frame structure of the traveling body 2.
And a frame frame 8 in which the strength member members are assembled vertically and horizontally are attached to the upper surfaces of the left and right main frames 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 are composed of 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 horizontal connection frames 9, 9, and the configuration of the fixed crawler traveling device 1 will be described before describing the mounting structure.

[0011] As shown in FIG.
A stationary track frame 11 in a front-rear direction, which freely rotates, is disposed, 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 grounding wheel 10 will be described. Here, the present invention can be applied to the structure of the fixed track frame 11 and the movable track frame 17. Here, the structure of the fixed track frame 11 will be described as a representative. As shown in FIGS. 6 and 7, at four mounting locations of the ground contact wheel 10, a rectangular tubular support boss 11 B is mounted and fixed to the lower surface in a posture orthogonal to the axial direction of the fixed-side track frame 11, and supported. The support shaft 29 that does not rotate from the boss 11B is projected outward, and the support shaft 29
The grounding wheel 10 is externally fitted and fixed to the protruding portion of the vehicle via a bearing 30 and a sealing material 31 so that the grounding wheel 10 is freely rotatable with respect to the support shaft 29. A reinforcing rod 44 having a substantially U-shaped cross section is placed over the side surface of the fixed-side track frame 11 and the support boss 11B having a rectangular tube shape.
Also, the support boss 11B and the like are reinforced.

As shown in FIG. 7, a sealing plate 32 made of sheet metal is provided at an outer end of the boss portion 10B of the ground wheel 10 to maintain the grease oil sealed in the boss portion 10B. It is configured to do so. A grease nipple 33 is provided on the enclosing plate 32. The grease nipple 33 secures a sufficient screw length for mounting the grease nipple 33 by caulking and fixing a nut 34 to the enclosing plate 32 and facilitates processing. I have to. Oil seal 3
In the first structure, since the surface 31a facing the bearing 30 is a flat surface, grease oil can leak from the inside of the boss portion 10B to the support boss 11B through the oil seal 31 at the time of grease filling operation. It will be easier. Conventionally, a portion of the oil seal 31 facing the bearing 30 is provided with a recessed portion on the support boss 11B side as shown by a dotted line. When sealed, there was no leakage from the oil seal 31 to the support boss 11B side, so that the seal could not be sealed any more and a sufficient amount of grease oil could not be sealed.

In order to firmly configure the support bosses 11B provided at four positions along the axis of the fixed track frame 11, a U-shaped cross-section reinforcing frame 16 is provided between the support bosses 11B. And is fixed in a state of being in contact with the lower surface of the substrate along the axis. Therefore,
The support bosses 11B can be firmly connected by the U-shaped cross-section reinforcing frame 16, and the connection with the fixed-side track frame 11 can also be strong. The left ends of the front and rear connection frames 9 and 9 are fixed track frame 1.
1, the connecting frames 9, 9 and the fixed-side track frame 11 are integrated to form a structure with 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 U-shaped cross-section reinforcing frame 16 applied to the fixed-side track frame 11
And the reinforcing rod 44, the movable track frame 17
It is also applied to. Such a U-shaped cross-section reinforcing frame 16
And the reinforcing rod 44, in particular, 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 and rear drive arm 18 will be described. FIG.
As shown in FIG. 4, the drive arm 18 is swingably supported by a boss member 22 attached to the connection frame 9, and is supported and held by the boss member 22 to rotate around the axis of the boss member 22. The rotating shaft 18C that moves, the inner upper arm 18A attached to the inner end 18a of the rotating shaft 18C protruding from the boss member 22, and the outer end 18b of the rotating shaft 18C protruding outside the boss member 22. And an outer lower arm 18B. The connection rod 19 and the drive rod 20 described above are linked to the inner upper arm 18A, and the outer lower arm 18A
A movable track frame 17 is connected to the tip of B 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 cannot be rotated by a square cross section, so that the connecting and attaching 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 as compared with 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 axle 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 lifting 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 so as to protrude further forward than the bracket 26, and the front end of the plate-like frame 27 is formed as a connection support 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 and lowering operation is not performed has substantially the same structure. 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.

Inverted U-shaped connecting frame 9 located on the front side
The mounting structure on the movable track frame 17 side is as follows. That is, as shown in FIG. 4, the right end of the connecting frame 9 is connected and fixed to the bracket 12 which rotatably supports the driving sprocket 13, and although not shown, the driving shaft for driving the driving sprocket 13 extends left and right. It can be linked to the protruding mission case, avoiding a configuration supported in a cantilevered state.

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 driving cylinder 21, the driving rod 20, the connecting rod 19, and the like for driving the movable track frame 17 up and down is avoided while avoiding interference with the connecting 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.

As shown in FIG. 2, the drive arm 18 is
Since the configuration of pivotally supporting the boss member 22 attached to the U-shaped connecting frame 9 is adopted, the structure for supporting the drive arm 18 can be reduced in weight and simplified. That is, in the related art, since the fulcrum shaft of the drive arm 18 is provided at a position distant from the connection frame 9, a structure in which a plate bracket thicker than the connection frame 9 is extended to pivotally support the drive arm 18 is adopted. Was. By doing so, a structure that is satisfactory in strength can be constructed, but the weight is heavy.
On the other hand, in the present invention, since the boss member 22 is directly attached to the connecting frame 9, a plate bracket for reinforcement is not required, and therefore, the weight can be reduced while securing sufficient strength. Was.

An unloader mechanism 35 is provided for carrying out from the grain storage section 6 to a carrier or the like outside the machine. As shown in FIG. 1, a screw conveyor 35A which is vertically carried out from the storage tank 6A and a screw conveyor 35A which is carried out vertically.
An unloader mechanism 35 is connected to the upper end of the unloader mechanism 35B by connecting a horizontal carry-out screw conveyor 35B so as to be able to swing up and down around a horizontal shaft center. Screw conveyor 3 for horizontal carry-out
The hydraulic cylinder 5B is driven by a hydraulic cylinder 35C so as to be able to swing up and down, so that the posture can be switched between a carry-out operation and a non- carry-out operation.

The pre-cutting unit 4 provided at the front end of the traveling machine body 2 is configured to be driven up and down by a lifting cylinder 36. The hydraulic circuit 37 for the lift cylinder 36, the hydraulic cylinder 35C of the unloader mechanism 35, and the drive cylinder 21 that drives the movable track frame 17 to move up and down is configured as follows. As shown in FIG. 12, the hydraulic oil from the hydraulic pump P is first supplied to the raising / lowering control valve 38 for the raising / lowering cylinder 36 of the pre-cutting unit 4.
An unloader control valve 39 and a rolling control valve 40 for the drive cylinder 21 are connected in series in this order. Since the rolling control valve 40 only needs to be provided for the crawler traveling device 1 on one side, an inexpensive hydraulic circuit 37 can be configured by performing such series connection.

An embodiment in which the movable track frame 17 is moved up and down to control the rolling 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) With respect to the configuration in which only one of the traveling devices 1 can be driven up and down, the configuration may be such that the traveling device on the left side is configured to perform a lifting operation. (2) As a form for driving the traveling device 1, the traveling device 1 is configured to be a crawler-type traveling device, and the traveling device 1 is moved up and down with respect to the traveling machine body 2 by lifting and lowering a track frame 17 provided with a plurality of grounded rolling wheels 10. Although the configuration in which the crawler travel device is operated is employed, a configuration in which the entire crawler traveling device is moved up and down may be employed. (3) The traveling device 1 may be a multi-wheel type having a plurality of traveling tires other than the crawler type.

[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.

FIG. 12 is a hydraulic circuit diagram for a lifting cylinder for a pre-cutting unit, a hydraulic cylinder for an unloader mechanism, and a driving cylinder for a lifting traveling device.

[Description of Signs] 1 Traveling device (elevating traveling device) 2 Traveling machine body 4 Driving operation unit 6 Grain storage unit 10 Ground contact wheel 13 Drive wheel body

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B62D 55/10 B62D 55/10 B (72) Inventor Kazuo Yasuda 64 Ishizukitamachi, Sakai-shi, Osaka Kubo Co., Ltd. Tamaki Sakai Factory (72) Inventor Nakaki 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Kubota Sakai Factory F-term (reference) 2B076 AA03 BA07 CC02 CC12 CC12

Claims (3)

[Claims] 1. A traveling device for a working vehicle, wherein the traveling device is configured as an elevating traveling device capable of vertically driving only one of the traveling devices with respect to a traveling body having a pair of left and right traveling devices. 2. The vehicle according to claim 1, further comprising: a left and right side portion of the traveling body on which a vertically movable device is located, which is vertically movable with respect to the traveling body.
The traveling device for a work vehicle according to claim 1, further comprising a driving control section and a grain storage section. 3. A pair of left and right traveling devices are of a crawler type, and a driving wheel supported by a lifting device driven up and down with respect to the traveling body so as not to move up and down with respect to the traveling body. The work according to claim 1 or 2, further comprising a body and a plurality of grounding wheels that can be driven to move up and down relative to the drive wheel together with the track frame while being supported by the track frame. Car traveling equipment.