JP2009207374A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operation efficiency by enabling the operation for removing mud attached to a traveling device to be carried out easily, and enabling the movement between workshops to be carried out rapidly. <P>SOLUTION: The working vehicle is constituted as follows. Right and left supporting legs 50 and 50 for supporting an undercarriage 2 on the ground are attached to the front and rear parts of the undercarriage 2 so as to be freely switched between a working posture of extending the supporting legs 50 and 50 downward and a no-working posture of housing the supporting legs 50 and 50 in an upper position. When the supporting legs 50 and 50 are switched to the working posture in a state in which rotating wheel frames 36 and 36 are moved to the most lowered position or a position near to the most lowered position based on the undercarriage 2 by the extension actions of right and left rolling cylinders 49 and 49, and thereafter the right and left rotating wheel frames 36 and 36 are lifted based on the undercarriage 2 by the shortening actions of the rolling cylinders 49 and 49, the whole machine body 1 is supported in a floated state from the ground by the supporting legs 50 and 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a work vehicle such as a combine.

  In a conventional work vehicle, the middle part of the left and right front rolling arms is pivotally mounted on the front part of the machine base so that the horizontal axis can pivot, and the middle part of the left and right rear rolling arms is pivoted on the rear part of the machine base. It is pivotally mounted, and the upper end of the left and right front rolling arms and the upper end of the rear rolling arm are connected to each other by an interlocking rod, and the lower ends of the left and right front rolling arms are connected to the front of the wheel frame. It is pivotally mounted, and the lower ends of the left and right rear rolling arms are pivotally mounted on the rear part of the wheel frame so that it can pivot on the horizontal axis, and either the machine side or the left or right front rolling arm or rear rolling arm Some of them have left and right rolling cylinders that forcibly rotate the front rolling arm and the rear rolling arm.

  This mechanism is used to correct the horizontal tilt of the machine base by raising and lowering the left and right rolling frames, and making the vehicle height adjustable by raising and lowering the left and right rolling frames. is there.

  On the other hand, since work vehicles such as combines work while running in a soft work place, mud adheres to the traveling device, and when traveling on the road, this mud falls off the traveling device and falls to the road surface, and other automobiles, etc. There is a problem that hinders driving. Therefore, before moving from the workplace to the road, it is necessary to remove the mud adhering to the traveling device.

Then, the technique which makes easy the operation | work which removes mud from a traveling apparatus using the above-mentioned mechanism is tried. As an example of this, Patent Document 1 separately prepares a stand that supports the machine base, and the rolling frame moves to the lowest position or a position close to the lowest position with respect to the machine base by the extension operation of the left and right rolling cylinders. In this state, the stand is attached to the underside of the machine base.After that, when the left and right rolling frame rises with respect to the machine base due to the shortening operation of the rolling cylinder, the stand is supported by the stand in a state where it floats to the ground. It is disclosed. In this way, while driving the traveling device in a state where the entire aircraft is levitated to the ground, the attached mud is to be dropped.
Japanese Utility Model Publication No. 7-18266

  However, in the technique disclosed in Patent Document 1 described above, it is necessary to easily separate the stand that supports the machine base and carry it to the work place. When the work vehicle is large, this stand can also withstand the weight of the machine body. It becomes a large size with as much strength as possible and cannot be easily carried to the workplace.

  For this reason, the conventional work vehicle cannot easily perform maintenance of the traveling device, and it takes time to move from the work place to the road, and it takes time to move between the work places and the work efficiency is lowered. It was.

  Further, even if the above-mentioned stand is provided so as to be freely retractable on the machine base side, the stand in the housed state tends to protrude from the machine base and may collide with an obstacle during work or traveling on the road.

In order to solve the above-mentioned problems, the present invention takes the following technical means.
That is, in the invention according to claim 1, the middle part of the left and right front rolling arms (40, 40) is pivotally attached to the front part of the machine base (2) so that the horizontal axis is rotatable, and the rear part of the machine base (2). The middle part of the left and right rear rolling arms (43, 43) is pivotally attached to the left and right rear rolling arms (40, 40) and the upper ends of the left and right front rolling arms (40, 40) and the rear rolling arms (43, 43). The upper end of each of the left and right front rolling arms (40, 40) is connected to the front of the wheel frame (36, 36) so that the horizontal axis can freely rotate. The lower end of the left and right rear rolling arms (43, 43) is pivotally attached to the rear part of the wheel frame (36, 36) so as to be pivotable in the horizontal direction. No rear rolling arm (43, 43) or interlocking rod (46, 46) The left and right rolling cylinders (49, 49) for forcibly rotating the front rolling arms (40, 40) and the rear rolling arms (43, 43) are attached between the machine base (2 The left and right support legs (50, 50) for supporting the machine base (2) with respect to the ground are attached to the front part and the rear part of the front part and the rear part so as to be switchable between a working state projecting downward and a non-acting state accommodated upward. When the rolling cylinders (49, 49) are extended, the wheel frames (36, 36) are moved to the lowest lowered position or a position close to the lowest lowered position with respect to the machine base (2). 50) is switched to the operating state, and then the left and right wheel frames (36, 36) are raised relative to the machine base (2) by the shortening operation of the rolling cylinders (49, 49). Entire body (1) by 50, 50) is obtained by the work vehicle, characterized in that it has a structure which is supported by the ground floating state.

  As a result, the left and right support legs 50, 50 that support the machine base 2 to the ground are attached to the front and rear parts of the machine base 2 so that they can be switched between an action state in which the machine base 2 projects downward and a non-action state in which the left and right support legs are stored upward. With the rolling cylinders 49 and 49 extending, the support frames 50 and 50 are switched to the operating state in a state in which the wheel frames 36 and 36 are moved to the lowest position or a position close to the lowest position with respect to the machine base 2. Thereafter, when the left and right wheel frames 36, 36 are raised with respect to the machine base 2 by the shortening operation of the rolling cylinders 49, 49, the entire body 1 is supported by the support legs 50, 50 in a floating state with respect to the ground. It becomes a state where the maintenance of the traveling device centering on the frames 36 and 36 can be easily performed. After the maintenance is completed, the support legs 50 are stored upward.

  According to a second aspect of the present invention, when the front and rear support legs (50, 50) are switched to a non-operating state, the grounding portions of the front and rear support legs (50, 50) are in a state of facing each other. The work vehicle according to claim 1, wherein the work vehicle is a vehicle.

As a result, the support legs 50 in the housed state are unlikely to protrude from the machine base 2.
The invention according to claim 3 is characterized in that the support legs (50, 50) are configured to be housed in a frame (52) on the machine base (2) side. It is a vehicle.

  Thus, by storing the support legs 50 and 50 in the frame 52 on the machine base 2 side, the support legs 50 and 50 do not protrude from the machine base 2.

  According to the first aspect of the present invention, before moving from the work place to the road, it is possible to easily remove the mud adhering to the traveling device by supporting the entire body 1 in a floating state with respect to the ground, and to quickly move between the work places. Work efficiency can be improved by being able to do it. Further, since the support legs 50, 50 necessary for the aircraft 1 to float to the ground can be stored on the machine base 2 side, it is not necessary to carry a support member such as the support legs 50, 50 to the work place. The work efficiency can be further increased.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the support legs 50, 50 in the stored state are difficult to protrude from the machine base 2, they are supported during work traveling or road traveling. Legs are less likely to collide with obstacles, improving safety.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, the support legs 50, 50 are protruded from the machine base 2 by being housed in the frame 52 on the machine base 2 side. Accordingly, the support legs 50 and 50 are less likely to collide with obstacles during work traveling or road traveling, and safety can be improved.

An embodiment of a work vehicle according to the present invention will be described by exemplifying a self-removing combine.
As shown in FIG. 1, the fuselage 1 of the combine is equipped with a control unit 3 on the upper front side of the machine base 2 formed in a rectangular shape in plan view, and a driving unit 4 is mounted on the rear side of the control unit 3; A grain storage device 5 is mounted on the rear side of the prime mover 4, a threshing device 6 is mounted on the side of the grain storage device 5, and a reaping device 7 is provided in front of the threshing device 6 so as to be movable up and down. A traveling device 8 is provided below the machine base 2. 9 is a waste cutter provided on the rear side of the threshing device 6.

  The control unit 3 includes a control seat 11 installed on the upper side of an engine cover 10 of the driving unit 4 to be described later, a step 12 provided in front and lower of the control seat 11, and a front operation erected in front of the control seat 11. The post 13 and the side operation panel 14 disposed on the left side of the cockpit 11 are configured. On the front operation post 13, a steering lever 15 that steers the machine body to the left and right by a left-right operation and raises and lowers the mowing device 7 by a front-rear operation and a wrist of a hand that holds the steering lever 15 are placed. A handle 16 having a support base is provided, and a parking brake operation lever 17 for turning on and off the parking brake is provided on the outer side of the front operation post 13. The side operation panel 14 includes a main transmission lever 18 that performs a shift operation of a hydrostatic continuously variable transmission that drives a transmission, a sub transmission lever 19 that performs a shift operation of a gear transmission mechanism in the transmission, and a throttle lever 20. And a mowing / threshing clutch lever (not shown).

  The prime mover 4 includes an engine 21 mounted on the machine base 2, an engine cover 22 covering the engine 21 and an auxiliary machine such as a radiator, and a cockpit 11 and an air cleaner 23 attached to the upper part of the engine cover 22. To do.

  The grain storage device 5 includes a grain tank 24 and a discharge cylinder 25 that discharges the grain in the grain tank 24. The Glen tank 24 is composed of a lower receiving member having a bottom conveying spiral and an upper tank 26 made of synthetic resin fitted and attached to the upper side of the lower receiving member. The discharge cylinder 25 is divided into a base-side discharge cylinder 27 and a distal-end-side discharge cylinder 28, and the distal-end-side discharge cylinder 28 is slidably fitted to the base-side discharge cylinder 27 so that the base-side discharge A telescopic drive device 29 that slides the tube 27 is provided to constitute a discharge tube that can be expanded and contracted.

The threshing device 6 is composed of an upper handling chamber equipped with a handling cylinder and a processing cylinder, and a lower sorting chamber equipped with a swing sorting shelf, a red pepper, a first spiral, and a second spiral.
The cutting device 7 has a weeding frame 31 attached to the front end of a support frame 30 supported on the front end of the machine base 2 by a horizontal axis, and a weed hoe 32 attached to the front end of the weeding frame 31. A pulling device 33 is obliquely installed on the rear side of the weed stub 32, a cutting blade device 34 is provided in a lower rear portion of the pulling device 33, and a conveying device 35 is moved from the upper side of the cutting blade device 34 to the rear upper side. Provide and configure. A cutting upper and lower cylinder for moving the support frame 30 up and down is provided.

  The traveling device 8 is driven by a transmission case which supports a large number of wheels 37 and 37 on left and right wheel frames 36 and 36 and is attached to the wheels 37 and 37 and the front part of the machine base 2. A crawler 39, 39 is wound around the sprocket 38, 38.

  That is, as shown in FIG. 2, the middle part of the left and right front rolling arms 40, 40 formed in a square shape in a side view at the front part of the machine base 2 is fixed to the front lower surface side of the machine base 2. The support member 41 is pivotally attached around the shaft 42 so as to be rotatable in the horizontal axis. Further, an intermediate portion of the left and right rear rolling arms 43, 43, which is also formed in a letter-like shape in a side view, at the rear part of the machine base 2, is centered on a shaft 45 on a support member 44 fixed to the rear lower surface side of the machine base 2. It is attached to the horizontal axis so that it can rotate freely.

  The upper ends of the left and right front rolling arms 40, 40 and the upper ends of the rear rolling arms 43, 43 are connected by interlocking rods 46, 46, respectively, and the lower ends of the left and right front rolling arms 40, 40 are connected to each other. The shafts 47 and 47 are pivotally attached to the front portions of the wheel frames 36 and 36 so as to be pivotable in the horizontal direction, and the lower ends of the left and right rear rolling arms 43 and 43 are attached to the rear portions of the wheel frames 36 and 36. , 48 so that the horizontal axis can pivot.

  Then, the bases of the left and right rolling cylinders 49, 49 are pivotally attached to the left and right mounting stays 51, 52 fixed to the rear upper side of the machine base 2, and the piston tips of the left and right rolling cylinders 49, 49 are connected to the interlocking rod 46, Axis 46.

  The left and right support legs 50 and 50 for supporting the machine base 2 to the ground are attached to the front part and the rear part of the machine base 2 so as to be switched between an action state in which the machine base 2 projects downward and a non-action state in which the support legs 50 are accommodated upward. That is, the left and right cylindrical frames 52, 52 are fixed to the front upper side and the rear upper side of the machine base 2, and the right and left ends of the cylindrical frames 52, 52 are orthogonal to the upper ends of the support legs 50, 50. The pivot fulcrum shafts 53, 53 fixed to the shaft are loosely fitted and attached.

  As described above, in the normal running state shown in FIG. 2 (a), the front and rear supports are supported in the stowed state (non-operating state) in which the four support legs 50, 50 on the front, rear, left and right are rotated upward along the machine base 2. The grounding portions at the free ends of the legs 50 and 50 are opposed to each other, and the grounding portions of the front and rear support legs 50 and 50 are connected and held by the pins 54 and 54. Thereby, since the support legs 50 and 50 do not easily protrude from the machine base 2, the support legs 50 and 50 are less likely to collide with obstacles when traveling on the road or traveling on the road, and safety can be improved.

  In the maintenance start state shown in FIG. 2B, first, the left and right rolling cylinders 49, 49 are extended to the maximum to lower the left and right wheel frames 36, 36 relative to the machine base 2, thereby Raise the vehicle height to the highest position. Then, the pins 54, 54 are removed, and the front, rear, left, and right support legs 50, 50 are rotated to a downward position (action state). In this state, the grounding portions of the support legs 50 and 50 are levitated to the ground. In addition, it is good to provide the fixing means which fixes the support legs 50 and 50 in the suspended state.

  2 (c), the left and right rolling cylinders 49, 49 are shortened to raise the left and right wheel frames 36, 36 relative to the machine base 2. As a result, the grounding portions of the support legs 50 and 50 are grounded to support the weight of the airframe 1, and the grounding surfaces of the left and right crawlers 39 and 39 float to the ground.

  In this state, the drive sprockets 38, 38 are driven forward or backward to adhere to the crawlers 39, 39, the wheel frames 36, 36, the wheels 37, 37, etc. while the left and right crawlers 39, 39 are idled. The mud that has been removed can be easily removed.

3 is a side view in which the support legs 50 and 50 are in an inoperative state, FIG. 4 is a rear view in the state of FIG. 3, and FIG. 5 is a back view in which the support legs 50 and 50 are in an activated state.
Further, as shown in FIG. 6, left and right support legs 50, 50 attached to the rear portion of the machine base 2 are attached to the rear end surface of the machine base 2 by left and right shafts 55, 55 having axial axes in the longitudinal direction of the machine body. May be provided. The left and right shafts 55, 55 are arranged at intervals within the ground contact interval between the left and right crawlers 39, 39. With this configuration, the left and right support legs 50 and 50 can be raised within the ground contact interval between the left and right crawlers 39 and 39, and maintenance can be performed by levitating the machine body 1 to a ground even in a narrow place.

  Further, as shown in FIG. 7, on the basis of the configuration shown in FIG. 2, the portions other than the grounding portions of the four front, rear, left and right support legs 50, 50, 50, 50 are arranged inside the cylindrical frames 52, 52. You may comprise so that it can accommodate. That is, the pivot fulcrum shaft 53 attached to the upper end of the support leg 50 is pivotally attached to the upper end of the support leg 50 by the shaft 56 so as to be refractably pivotable, and the support leg 50 and the pivot fulcrum shaft 53 are aligned with each other. The pivot fulcrum shaft 53 and the support leg 50 are configured to be inserted into the cylindrical frame 52 in a state of being extended in a shape. Thereby, the non-operating support leg 50 can be stored in a compact manner, and the problem that the support leg 50 collides with an obstacle can be solved. In order to enter the operating state, the support leg 50 may be pulled outward and refracted downward.

  As shown in FIGS. 8 and 9, the left and right support legs 50, 50 attached to the rear part of the machine base 2 in the configuration in which the front support legs 50 can be accommodated in the cylindrical frame 52 as in the configuration of FIG. 7. May be attached to the rear part of the machine base 2 so as to be housed in the left and right cylindrical frames 57, 57 attached in the front-rear direction at a predetermined interval in the left-right direction. The left and right cylindrical frames 57 and 57 are disposed within a ground contact interval between the left and right crawlers 39 and 39. With this configuration, the left and right support legs 50, 50 can be pulled out and refracted downward, and can be raised within the ground contact interval between the left and right crawlers 39, 39. It can be carried out.

  As shown in FIG. 10, the upper ends of the scrapers 58 and 58 are pivotally attached to the rear upper positions of the left and right crawlers 39 and 39 in the machine base 2 by a horizontal shaft 59 so that the scrapers 58 and 58 are attached. Provided are springs 60, 60 that bias downward. Thus, in a state where the scrapers 58 and 58 are lifted and retracted from the upper surfaces of the crawlers 39 and 39, the scrapers 58 and 58 are retracted to a position higher than the machine base 2, and the retracted position of the scrapers 58 and 58 is a spring. It is held by 60, 60 over the fulcrum or by a lock device provided separately. In the state where the scrapers 58 and 58 are rotated downward, the lower ends (free ends) of the scrapers 58 and 58 come into contact with the upper outer surfaces of the crawlers 39 and 39, and the crawlers 39 and 39 are floated to the ground. The muddy soil adhering to the outer surfaces of the crawlers 39, 39 can be scraped off by driving forward with. The radius of curvature of the base of the lugs 63, 63 of the crawlers 39, 39 is formed with a large curvature at the tips of the scrapers 58, 58. However, since the lugs 63, 63 have a sufficient height, they run. Sometimes there is no shortage of traction. Further, as shown in FIG. 11, scraper rails 61, 61 are integrally formed of rubber material on the left and right sides of the drive holes 62, 62 with which the drive sprockets 38, 38 are engaged on the outer surface side of the crawlers 39, 39. The scrapers 58 and 58 are pushed up to the upper end surfaces of the scraper rails 61 and 61, and the distance between the outer surfaces of the crawlers 39 and 39 and the tips of the scrapers 58 and 58 is maintained. Since the scrapers 58 and 58 are in sliding contact with the upper end surfaces of the scraper rails 61 and 61 and are not in direct contact with the outer surfaces of the crawlers 39 and 39, wear and deformation of the tips of the scrapers 58 and 58 are prevented.

  In addition, the cover portion covering the lower side surface of the combine grain tank 24 shown in FIG. 1 includes an ascending switch 64 and a descending switch 65 for expanding and contracting the left and right rolling cylinders 49, and an output of the hydrostatic continuously variable transmission. A vehicle speed increase switch 66 and a vehicle speed reduction switch 67 are provided which can change the rotation and arbitrarily change the rotation speed of the drive sprockets 38, 38. Thereby, at the time of maintenance work, an operator can perform a shift of the traveling device 8 and a floating operation of the body 1 from the traveling device 8 side, and work efficiency is increased.

Combine side view Illustration of action state Side view with support legs in a non-operating state Rear view of the state of FIG. Rear view with support legs in action Rear view with support legs in action Illustration of action state Side view showing working state of support legs Rear view with support legs in action Side view for explaining the operation state of the scraper Explanatory drawing showing the crawler shape

Explanation of symbols

2 Machine base 36 Rolling frame 40 Front rolling arm 43 Rear rolling arm 46 Interlocking rod 49 Rolling cylinder 50 Support leg 52 Cylindrical frame (frame)

Claims (3)

  The middle part of the left and right front rolling arms (40, 40) is pivotally attached to the front part of the machine base (2) so that the horizontal axis can freely rotate, and the left and right rear rolling arms (43, 40) are attached to the rear part of the machine base (2). 43) is pivotably mounted in the horizontal axis, and the upper ends of the left and right front rolling arms (40, 40) and the upper ends of the rear rolling arms (43, 43) are connected to the interlocking rods (46, 40). 46), and the lower ends of the left and right front rolling arms (40, 40) are pivotally attached to the front portions of the wheel frames (36, 36) so as to be pivotable in the horizontal direction. The lower end of the arm (43, 43) is pivotally attached to the rear part of the wheel frame (36, 36) so as to be pivotable in the horizontal direction, and the machine base (2) side and the left and right rear rolling arms (43, 43). Alternatively, the front side roller is interposed between any one of the interlocking rods (46, 46). Left and right rolling cylinders (49, 49) for forcibly turning the rolling arms (40, 40) and the rear rolling arms (43, 43) are mounted, and the machine base is mounted on the front and rear of the machine base (2). The left and right support legs (50, 50) for supporting the ground (2) are attached to be switched between a working state projecting downward and a non-working state retracted upward, and the left and right rolling cylinders (49, 49) are extended. The support legs (50, 50) are switched to the operating state in a state in which the wheel frame (36, 36) is moved to the lowest position or a position close to the lowest position with respect to the machine base (2). When the left and right rolling frame (36, 36) rises with respect to the machine base (2) by the shortening operation of the rolling cylinder (49, 49), the airframe ( ) Work vehicle, generally characterized by being configured to be supported by the ground floating state.   2. The structure according to claim 1, wherein when the front and rear support legs (50, 50) are switched to a non-operating state, the grounding portions of the front and rear support legs (50, 50) face each other. Work vehicle.   The work vehicle according to claim 1, wherein the support legs (50, 50) are configured to be housed in a frame (52) on the machine base (2) side.

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