JP2022062881A - Multipurpose agricultural implement - Google Patents

Abstract

To enhance versatility resulting from expansion of a use range so as to meet a request of a user who wants to use in various farm fields and traveling places or the like without depending on whether a flat ground or a sloping ground.SOLUTION: A multipurpose agricultural implement includes a drive mechanism part 5 which has a rotation drive part 6 arranged on a load carrying platform 2, a rotation branch mechanism part 7 which transmits rotation movement output from the rotation drive part 6 to respective right and left intermediate gear units Gm, Gm arranged on one upper end part of either first frames Fa, Fa, or second frames Fb, Fb of respective lifting parts 4, 4, and rotation transmission mechanism parts 8, 8 which are arranged on left and right sides to transmit rotation movement of the respective intermediate gear units Gm, Gm to sprockets Gs, Gs of respective crawler parts 3, 3 along the respective first frames Fa, Fa and the respective second frames Fb, Fb. A control part 9 can relatively and independently lift the respective crawler parts 3, 3 by selectively controlling each of the lifting parts 4, 4.SELECTED DRAWING: Figure 1

Description

The present invention relates to a multipurpose agricultural work machine that can be used for various purposes such as transporting agricultural products in agricultural work and spraying chemicals on agricultural products.

Conventionally, by providing a loading platform, left and right crawler sections, left and right elevating sections arranged between the loading platform section and each crawler section to raise and lower the loading platform section, and a drive mechanism section for driving each crawler section, in agricultural work. Agricultural work machines used for transporting agricultural products are known, and examples of this type of agricultural work machine include a power carrier disclosed in Patent Document 1, a stilt carrier disclosed in Patent Document 2, and Patent Document 3. Agricultural carriers to be disclosed are known.

The power carrier of the same document 1 is a power carrier whose vehicle body can be expanded and contracted in the width direction, and is a power carrier that can raise and lower the loading platform according to the height of agricultural products and the height of workers. Specifically, the left side vehicle body and the right side vehicle body are connected so as to be expandable and contractible in the width direction, and the left side loading platform is supported so as to be able to move up and down to the left side frame via the left side lifting device. The right loading platform is supported on the right frame via the right lifting device so that it can be lifted and lowered, and the left and right hydraulic cylinders are provided as the left and right lifting means that operate synchronously with the left and right lifting devices. be.

Further, in the high-floor carrier of the same document 2, when the driver accompanies the left and right side positions of the vehicle body while performing harvesting work, crop management work, etc., the crawler grounding side portion is used at the toes. The core metal of this crawler that runs and rotates is the tip of the toe that is easily stepped on the inner circumference rolling surface of the crawler or touches the ground contact side, and accidentally stepped on the inner circumference rolling surface of this ground contact side. The purpose is to solve the problem that it is easy to be caught between the rolling surface portion on which the protrusion is formed and the grounding wheel. Specifically, the rolling of the grounding wheel arranged along the grounding side of the crawler. A crawler guard along the front-rear direction is provided at an appropriate height between the wheel shaft portion and the inner peripheral surface of the ground contact edge portion overhanging to the outside of the rolling surface portion of the crawler guided by the ground contact wheel. It is composed.

Further, the agricultural carrier of the same document 3 is intended to provide an agricultural carrier capable of easily operating the clutch on / off while the worker is standing on the loading platform. Specifically, it is arranged on the vehicle body, a traveling unit driven by a driving force transmitted from the driving unit, and traveling from the driving unit on the rear side of the vehicle body. The rear clutch lever for turning on and off the transmission of the driving force to the part, the front clutch lever rotatably arranged on the front side of the vehicle body, and the rear clutch lever and the front clutch lever rotate in conjunction with each other. One end is connected to the rear clutch lever and the other end is connected to the front clutch lever so that it can move. It is configured to include a clutch operation pedal having a front clutch lever and an arm portion that rotates in conjunction with each other.

Japanese Unexamined Patent Publication No. 2000-264217 Japanese Unexamined Patent Publication No. 2019-006178 Japanese Unexamined Patent Publication No. 2016-084772

However, the conventional agricultural work machine disclosed in the above-mentioned Patent Document 1-3 has the following problems.

First, since the running surface, especially the running surface in the left-right direction, is assumed to be a flat surface with no inclination, if the field or the traveling place is an inclined surface or a stepped surface, the loading platform will also be inclined and placed on the loading platform. Not only is it not possible to stably transport agricultural products and materials, but there is also the problem that it cannot be used practically due to requirements such as safety and workability. After all, it is not possible to meet the user's request to use it in various fields and driving places without being affected by flat land and sloped land, such as the fields and driving places that can be used are limited, and it is sufficient from the viewpoint of versatility. I can't say.

Secondly, there is also a type that makes it possible to adjust the crawler spacing on the left and right to match the ridge width by dividing the loading platform into left and right and connecting it so that it can be expanded and contracted in the left and right direction by the connecting mechanism. When trying to adjust the crawler spacing at the actual use site, it is necessary to perform the adjustment with the left and right crawlers in pressure contact with the ground, which makes easy adjustment difficult. For this reason, in reality, it is necessary to make adjustments while moving the crawler a little, and the adjustment work requires a great deal of labor and time.

Thirdly, since it is configured as a transport vehicle mainly dedicated to transport, it has difficulty in diversity and versatility. In particular, when it is intended to mount another functional device, for example, a chemical spraying device, it is necessary to mount a chemical spraying device that functions independently. It is necessary to configure it as a completed dedicated device including the above, which is disadvantageous in terms of cost and is a large heavy device, so that it cannot be easily mounted on or removed from a carrier.

An object of the present invention is to provide a multipurpose agricultural work machine that solves the problems existing in such a background technique.

In order to solve the above-mentioned problems, the present invention is arranged between the loading platform portion 2, the crawler portions 3 and 3 arranged on the left and right, the loading platform portion 2 and the crawler portions 3 and 3, and the first frames Fa and Fa. The elevating parts 4 and 4 arranged on the left and right to raise and lower the loading platform 2 by the X-link mechanisms 4x and 4x in which the intermediate positions between the second frame Fb and Fb are connected via the rotating parts R and R, and each crawler part 3 When constructing the multipurpose agricultural work machine 1 including at least the drive mechanism unit for driving the The rotary branch mechanism 7 and each intermediate gear unit Gm transmitted to the left and right intermediate gear units Gm and Gm arranged at the upper end of one of the first frame Fa, Fa or the second frame Fb, Fb in 4 and 4, respectively. , Gm rotational motion is transmitted to the sprockets Gs and Gs of the crawlers 3 and 3 along the first frames Fa and Fa and the second frames Fb and Fb, respectively. A drive mechanism unit 5 having 8 is provided, and a control unit 9 capable of independently raising and lowering each crawler unit 3 and 3 by selecting and controlling each elevating unit 4 and 4 is provided. It is characterized by becoming.

In this case, according to a preferred embodiment of the invention, the elevating portions 4 and 4 may be provided with drive cylinders 11 and 11 that change the inclination angle of the first frame Fa, Fa or the second frames Fb, Fb. Further, the rotation transmission mechanism portions 8 and 8 are left and right configured by the first relay gear units 12 and 12 arranged on the rotation portions R and R and the timing chains 13 and 13 bridged between the intermediate gear units Gm and Gm. It was bridged between the front transmission portions 8f and 8f of the above, and the second relay gear units 14 and 14 and the first relay gear units 12 and 12 arranged at the lower ends of the first frame Fa, Fa or the second frames Fb and Fb. Left and right rear transmission units 8r and 8r configured by timing chains 15 and 15 and left and right relay transmission units 8t and 8t that transmit the rotational motion of the second relay gear units 14 and 14 to the sprockets Gs and Gs are provided. Can be configured. On the other hand, the loading platform portion 2 includes a loading platform left portion 2m and a loading platform right portion 2s that are divided into left and right, and a connecting mechanism portion 16 that is slidably connected by being provided between the loading platform left portion 2m and the loading platform right portion 2s. At the same time, the lower surface 2 md can be attached to the loading platform 2 at one end of the loading platform left portion 2 m or the loading platform right portion 2 s at positions separated from each other in the front-rear direction on one lower surface 2 md via the rotating portions 17s and 17 s. At least one strut portion 17, 17 that can be displaced to the storage position Xr that overlaps the used position Xu or the lower surface 2 md that protrudes downward from the above can be provided. On the other hand, the loading platform portion 2 is provided with a chemical solution spraying device 18 attached to the loading platform portion 2 and for spraying the chemical solution, and the chemical solution spraying device 18 is positioned at a predetermined position on the upper surface 2u of the loading platform portion 2. An installation unit 19 that can be installed can be provided, and the chemical liquid spraying device 18 is provided with a rotary input unit 18i for rotating the built-in liquid feed pump 18p, and the rotary input unit 18i is provided with a rotary drive unit 6 to the rotary input unit 18i. A rotation transmission member 20 for transmitting a rotational movement to be output can be provided. Further, the chemical spraying device 18 is provided with support legs 21 that can be attached to and detached from at least a part of the units 18m of the chemical spraying device 18 and can hold the unit 18m at a predetermined height when mounted. be able to.

According to the multipurpose agricultural work machine 1 according to the present invention having such a configuration, the following remarkable effects are obtained.

(1) As a basic configuration, the crawler portions 3 and 3 arranged on the left and right can be raised and lowered independently, so that not only in a normal flat field but also in a field or a running place provided on an inclined surface. It is possible to travel in a state where the upper surface 2u of the loading platform 2 is maintained almost horizontally, and for example, even liquid fertilizer contained in a bucket or the like can be easily transported, so that stable transportation and work can be performed. At the same time, safety and workability can be further improved. As a result, it is possible to meet the user's request to use it in various fields and running places without being influenced by flat land and slope, and it is possible to increase versatility by expanding the range of use.

(2) According to a preferred embodiment, if the elevating units 4 and 4 are provided with drive cylinders 11 and 11 that change the tilt angle of the first frame Fa, Fa or the second frames Fb, Fb, the control unit 9 can be used. Independent control of each drive cylinder 11 and 11 can be easily and quickly performed, and when combined with the X-link mechanisms 4x and 4x, it can contribute to overall miniaturization and cost reduction.

(3) According to a preferred embodiment, when the rotation transmission mechanism portions 8 and 8 are configured, they are bridged between the first relay gear units 12 and 12 arranged on the rotation portions R and R and the intermediate gear units Gm and Gm. Left and right front transmission units 8f and 8f composed of timing chains 13 and 13, and second relay gear units 14 and 14 and first relay gear arranged at the lower ends of the first frame Fa, Fa or the second frame Fb and Fb. Left and right rear transmission units 8r and 8r configured by timing chains 15 and 15 spanned between units 12 and 12 and left and right transmission motions of the second relay gear units 14 and 14 to sprockets Gs and Gs. If the relay transmission units 8t and 8t are provided, even if the expansion and contraction strokes of the X-link mechanisms 4x and 4x are different in the vertical direction, the timing chains 13 ... Therefore, it is possible to reliably and stably raise and lower the crawler portions 3 and 3 independently, and it is possible to improve the reliability of operation.

(4) According to a preferred embodiment, when the loading platform portion 2 is configured, it is slidably connected by being provided between the loading platform left portion 2m and the loading platform right portion 2s divided into left and right, and the loading platform left portion 2m and the loading platform right portion 2s. If the connecting mechanism portion 16 is provided, the size of the loading platform portion 2 can be changed and the distance between the crawler parts 3 and 3 can be adjusted. It can contribute to the improvement of workability and safety when using 1.

(5) According to a preferred embodiment, one end of the left portion of the loading platform 2m or the right portion of the loading platform 2s is attached to the loading platform 2 at positions separated from each other in the front-rear direction on one lower surface 2md via the rotating portions 17s and 17s. If at least one strut portion 17 or 17 that can be displaced to the used position Xu protruding downward from the lower surface 2 md or the storage position Xr overlapping the lower surface 2 md is provided, the crawler portions 3 and 3 are independently raised and lowered. By combining with the function, the crawler portion 3 provided in the left portion 2m of the loading platform or the right portion 2s of the loading platform that moves and adjusts in the left-right direction can be floated upward. The size can be easily changed with the crawlers 3 and 3 stopped, and the power source can be changed without wasting it.

(6) According to a preferred embodiment, the loading platform portion 2 is provided with a chemical solution spraying device 18 attached to the loading platform portion 2 and for spraying the chemical solution, and the chemical solution spraying device is provided at a predetermined position on the upper surface 2u of the loading platform portion 2. If the installation unit 19 that can be installed by positioning the 18 is provided, the optimum installation unit 19 for the chemical liquid spraying device 18 to be mounted can be constructed, so that the mounting of the chemical liquid spraying device 18 on the multipurpose agricultural work machine 1 is reliable and stable. It is possible to increase the versatility and versatility as well as the transportation function.

(7) According to a preferred embodiment, the chemical liquid spraying device 18 is provided with a rotary input unit 18i for rotating the built-in liquid feed pump 18p, and the rotary motion output from the rotary drive unit 6 is transmitted to the rotary input unit 18i. If the rotation transmission member 20 is provided, the power source of the chemical liquid spraying device 18 can be shared with the rotary drive unit 6 of the multipurpose agricultural work machine 1, which can contribute to cost reduction, weight reduction and miniaturization of the chemical liquid spraying device 18. ..

(8) According to a preferred embodiment, a support leg portion that can be attached to and detached from the chemical liquid spraying device 18 to at least a part of the unit 18m of the chemical liquid spraying device 18 and can hold the unit 18m at a predetermined height at the time of mounting. If 21 ... Is provided, even a large and heavy unit 18 m can be easily and efficiently mounted and removed from the loading platform 2 by one operator.

Rear view of the multipurpose agricultural work machine according to the preferred embodiment of the present invention, Plan view of the multipurpose agricultural work machine, Side view of the multipurpose agricultural work machine when the loading platform is raised, Side view of the multipurpose agricultural work machine when the loading platform is descending, A side view configuration diagram of the rotation branching mechanism and the rotation transmission mechanism provided in the multipurpose agricultural work machine, Bottom view showing the main configuration of the lower surface of the loading platform of the multipurpose agricultural work machine, Explanatory drawing when adjusting the expansion and contraction of the loading platform as seen from the side of the multipurpose agricultural work machine, Explanatory drawing when mounting the chemical spraying device on the multipurpose agricultural work machine, Explanatory drawing when connecting (connecting) the chemical spraying device to the multipurpose agricultural work machine via the rotation transmission member, A plan view of the chemical spraying device mounted on the multipurpose agricultural work machine, Explanatory view of the rear view of the nozzle unit provided in the chemical spraying device, Explanation of the use of the support legs in the chemical spraying device,

Next, preferred embodiments according to the present invention will be given and will be described in detail with reference to the drawings.

First, the configuration of the main part of the multipurpose agricultural work machine 1 according to the present embodiment will be described with reference to FIGS. 1 to 7.

The multipurpose agricultural work machine 1 has, as a basic configuration of a main part, a loading platform part 2, a pair of crawler parts 3 and 3 arranged on the left and right, and arranged on the left and right, and the first frame Fa, Fa and the second frame Fb. , A pair of elevating portions 4 and 4 having X-link mechanisms 4x and 4x in which intermediate positions of Fb are connected by rotating portions R and R, and a drive mechanism portion 5 for driving a pair of crawler portions 3 and 3 are provided.

In this case, the loading platform portion 2 forms a rectangular shape in a plan view as shown in FIG. 2, and forms an upper surface 2u on a flat surface as shown in FIG. In the case of the example, a rectangle close to a square was selected for the plan view. When configuring the loading platform 2, as shown in FIG. 2, the loading platform left portion 2m and the loading platform right portion 2s divided into left and right are provided, and as shown in FIG. 6, the loading platform left portion 2m and the loading platform right portion are configured. A connecting mechanism portion 16 that allows the left portion 2m of the loading platform and the right portion 2s of the loading platform to be expanded and contracted in the left-right direction Dx is provided between the portions 2s and connected. In the example, the size ratio of the left portion of the loading platform 2m and the right portion of the loading platform 2s in the left-right direction Dx was selected to be approximately 4: 1. In this specification, the left-hand side is the left position and the right-hand side is the right position when viewed from the worker located behind.

As shown in FIG. 6, the connecting mechanism portion 16 includes a guide mechanism portion 16g and an expansion / contraction adjusting portion 16a. The guide mechanism portion 16g is, for example, a plurality of pipes (three in the example) fixed to the lower surface 2md of the left portion 2m of the loading platform at positions separated from each other in the front-rear direction Dy by arranging the longitudinal direction parallel to the left-right direction Dx. It is composed of a member 21 ... and a shaft member 22 ... inserted into the corresponding pipe member 21 ... by fixing one end to the lower surface 2sd of the loading platform right portion 2s and projecting the other end side to the loading platform left portion 2m side. can do. Further, as shown in FIG. 6, the expansion / contraction adjusting portion 16a is arranged at the center position in the front-rear direction Dy of the guide mechanism portion 16g, and the nut is arranged on the lower surface 2md of the loading platform left portion 2m and the axial direction is arranged in the left-right direction Dx. The member 23 is fixed, and the operating member 24 whose axial displacement is restricted is rotatably attached to the lower surface 2sd of the right portion 2s of the loading platform by using the bearing portion 25. An operation handle 24h is provided at the right end of the operation member 24, and the left side is screwed into the nut member 23 as a rod-shaped screw portion 24s. The operation handle 24h may be configured by a detachable method that is attached only to the operation member 24 at the time of necessary operation, may be configured by a retractable method, or may be an integrated type. ..

As described above, when the loading platform portion 2 is configured, the connecting mechanism portion 16 that is slidably connected by being provided between the loading platform left portion 2m and the loading platform right portion 2s divided into left and right and the loading platform left portion 2m and the loading platform right portion 2s. If it is configured with It can contribute to the improvement of workability and safety.

Further, as shown in FIGS. 6 and 7, one end is attached via the rotating portions 17s and 17s at a position separated from the lower surface 2 md of the lower surface 2 m of the loading platform in the front-rear direction by the rotating portions 17s and 17s, so that the lower surface is downward with respect to the lower surface 2 md. At least one (two in the example) strut portions 17, 17 that can be displaced to the storage position Xr that overlaps the use position Xu or the lower surface 2 md that protrudes from the bottom surface are provided. Note that 17c ... Indicates a holding portion using a stopper pin for holding the support columns 17, 17 displaced to the storage position Xr. If such support columns 17 and 17 are provided, the crawler section provided in the loading platform left portion 2m or the loading platform right portion 2s for adjusting the movement in the left-right direction by combining with the independent relative elevating functions of the crawler portions 3 and 3. Since 3 can be floated upward, it is possible to easily adjust the distance between the crawler portions 3 and 3 and change the size of the loading platform portion 2 without difficulty while the crawlers 3 and 3 are stopped. It can be done without wasting the power source. In addition, in the figure, 10 indicates a steering grip.

The example shows the case where two support columns 17 and 17 are provided, but one may be provided, or three or more columns may be provided and used depending on the unevenness of the ground or the like. Further, although the example shows the case where the two support columns 17 and 17 are arranged in the same direction, they may be arranged in the orthogonal direction as in the support column 17e shown by the virtual line in FIG. .. As described above, the arrangement direction of the support columns 17 and 17 does not matter, but in particular, when the columns are not in the same direction including the orthogonal direction, the support columns 17 and 17 can be erected on the same straight line in the front-rear direction Dy. It is possible to avoid interference between the 17s and to store them compactly.

On the other hand, in the pair of crawler portions 3, 3, the left crawler portion 3 is arranged at the machine frame 26, the sprockets Gs arranged at the rear end of the machine frame 26, and the front end of the machine frame 26, as shown in FIG. A plurality of (five examples) rolling wheels 28, which are between the idler 27, the sprocket Gs and the idler 27 and are arranged at predetermined intervals below the sprocket Gs and the idler 27, and the sprocket Gs and the idler 27. It is configured as a known crawler traveling portion including a rubber crawler belt 29 bridged between the wheels 28. Further, the crawler portion 3 on the right side is also configured in the same manner as the crawler portion 3 on the left side described above, except that the crawler portion 3 on the right side is symmetrical.

On the other hand, as shown in FIG. 3, the elevating portion 4 on the left side of the pair of elevating portions 4 and 4 includes an X-link mechanism 4x in the main portion and a drive cylinder 11 for displacing the X-link mechanism 4x. .. The X-link mechanism 4x includes a first frame Fa and a second frame Fb, and is configured by connecting an intermediate position between the first frame Fa and the second frame Fb by a rotating portion R. Then, the first frame Fa rotatably connects the lower end portion located on the rear side to the rear position at the upper end of the machine frame 26 via the support shaft portion 31, and the upper end portion located on the front side. It is displaceably engaged in the front-rear direction Dy with the front position of the lower surface 2 md of the left portion 2 m of the loading platform. In the case of the front side, the engaging portion 33 provided at the upper end portion of the first frame Fa is engaged with the guide portion 32 having the guide rails 32s in which the front-rear direction Dy is the longitudinal direction provided on the lower surface 2 md of the left portion 2 m of the loading platform. .. Specifically, bearing members are attached to both ends of the shaft attached so as to penetrate the first frame Fa, and the bearing members are engaged with the guide rails 32s.

Further, in the second frame Fb, the upper end portion located on the rear side is rotatably connected to the rearward position of the lower surface 2 md of the left portion 2 m of the loading platform via the support shaft portion 34, and the lower end portion located on the front side. The portion is displaceably engaged in the front-rear direction Dy at the front position at the upper end of the machine frame 26. In the case of the front side, the engaging portion 36 provided at the lower end portion of the second frame Fb is engaged with the guide portion 35 having the guide rails 35s in which the front-rear direction Dy is the longitudinal direction provided at the front end position at the upper end of the machine frame 26. The configuration is the same as the configuration of the guide portion 32 and the engaging portion 33 arranged on the upper side described above.

On the other hand, in the drive cylinder 11, the rear end of the cylinder body 11m is rotatably attached to the rear position of the machine frame 26, and the cylinder rod 11r protruding from the front end of the cylinder body 11m is attached to the second frame Fb. It is rotatably attached to the intermediate position of the second frame Fb between the upper end portion (support shaft portion 34) and the rotating portion R.

As a result, if the drive cylinder 11 is driven and controlled, the cylinder rod 11r expands and contracts with respect to the cylinder body 11 m, and the inclination angle of the second frame Fb can be changed. As shown in FIG. 4, the loading platform can be changed. The portion 2 can be relatively translated in the vertical direction, that is, the crawler portion 3 on the left side can be independently controlled to move up and down relative to each other. As the drive cylinder 11, various types such as electric type, pneumatic type, and hydraulic type can be used.

Further, the elevating portion 4 on the right side, that is, the X-link mechanism 4x and the drive cylinder 11 on the right side are configured in the same manner as the X-link mechanism 4x and the drive cylinder 11 on the left side described above, except that they are symmetrical. In this way, if the elevating portions 4 and 4 are configured by providing the drive cylinders 11 and 11 that change the tilt angle of the first frame Fa, Fa or the second frame Fb, Fb, each drive cylinder 11 is configured by the control unit 9. , 11 can be controlled independently easily and quickly, and can contribute to the overall miniaturization and cost reduction when combined with the X-link mechanisms 4x and 4x.

Further, as shown in FIGS. 1 and 2, a rotation drive unit 6 and a control unit 9 are arranged at the rear end of the loading platform 2. The rotary drive unit 6 of the example includes a drive source unit 6p incorporating an engine and an operation unit 6c that controls the rotation of the drive source unit 6p. Therefore, the operation unit 6c has a built-in traveling transmission and has various operation functions such as a main clutch lever, left and right side clutch levers for steering, and a speed change lever. The accelerator lever is attached to the steering grip 10 described above.

In this case, the operation unit 6c includes two rotation output systems. That is, as shown in FIGS. 5 and 9, the first output shaft 41 of the traveling system that outputs the controlled rotation, and as shown in FIGS. 3 and 9, the chemical liquid spraying device 18 (main body unit 18 m) described later. Is provided with a second output shaft 42 that transmits rotation to the main body unit 18 m when mounted.

Although the example shows the case where the output shafts 41 and 42 are taken out from the operation unit 6c, the second output shaft 42 may be taken out directly from the drive source unit 6p. Further, the traveling mission may be configured as an independent unit and may be arranged outside the operation unit 6c. In this case, the rotational output of the drive source unit 6p is transmitted to an external traveling mission via a transmission mechanism, and the rotational output shafts protruding from the left and right of this traveling mission are connected to the transmission shaft 44 divided into left and right, respectively. It can be replaced by various other configurations having similar functions, such as being able to be combined and configured.

According to the present invention, the control unit 9 independently selects and controls at least the left and right elevating units 4, 4, that is, the left and right drive cylinders 11 and 11, so that the left and right crawler units 3 and 3 are independently relative to each other. In addition to being equipped with a control function that can be raised and lowered, it is also equipped with various control functions that control overall control of the multipurpose agricultural work machine 1.

Further, between the rotation drive unit 6 and the crawler units 3 and 3, a rotation branch mechanism unit 7 and rotation transmission mechanism units 8 and 8 arranged on the left and right are provided. And the rotation transmission mechanism units 8 and 8 constitute a drive mechanism unit 5 which is a main part of the present invention.

FIG. 5 shows a configuration diagram of the drive mechanism unit 5. The rotation branch mechanism unit 7 transmits the rotational movement output from the rotation drive unit 6 to the elevating units 4, 4, that is, the support shafts of the upper ends of the second frames Fb, Fb in the X-link mechanisms 4x, 4x arranged to the left and right. It is provided with a structure for transmitting to each of the left and right intermediate gear units Gm and Gm arranged coaxially with the portion 34. Specifically, a transmission shaft 44 having a left-right axial center fixed to the first output shaft 41 described above and rotatably arranged below the first output shaft 41 (FIG. 1). The transmitted pulley 45 is fixed at an intermediate position (see), and a timing belt 46 is bridged between the transmitted pulley 45 and the output pulley 43. Thereby, the main clutch function can be configured. Further, the first gears 47 and 47 are fixed at the left and right ends of the transmission shaft 44, respectively, and the timing chains 48 and 48 are bridged between the first gears 47 and 47 and the corresponding intermediate gear units Gm and Gm, respectively. Consists of the rotary branch mechanism unit 7. The intermediate gear unit Gm is configured as a double gear unit having an input gear Gmi and an output gear Gme, and the first relay gear unit 12 and the second relay gear unit 14, which will be described later, also have the same configuration. .. Further, as shown in FIG. 5, for example, the transmission shaft 44 expands and contracts in the left-right direction Dx by a pipe-shaped first shaft 44f having a rectangular cross section and a second shaft 44s having a rectangular cross section inserted into the first shaft 44f. The first shaft 44f is attached to the lower surface 2md of the left portion of the loading platform 2m via the bearing portion (not shown), and the second shaft 44s is attached to the lower surface of the right portion 2s of the loading platform via the bearing portion (not shown). It can be attached to 2sd. This coupling method is an example, and a similar coupling method such as a spline coupling method can be used.

On the other hand, the rotation transmission mechanism unit 8 on the left side of the pair of rotation transmission mechanism units 8 and 8 causes the rotational movement of the intermediate gear unit Gm on the right side along the second frame Fb and the first frame Fa, and the crawler unit 3 on the right side. It has a structure to transmit to the sprocket Gs of. Specifically, the front-stage transmission unit configured by the timing chain 13 bridged between the output gear Gme of the intermediate gear unit Gm and the input gear 12i of the first relay gear unit 12 arranged coaxially with the rotating unit R. It was bridged between 8f and the output gear 12e of the first relay gear unit 12 and the input gear 14i of the second relay gear unit 14 arranged coaxially with the support shaft portion 31 at the lower end of the first frame Fa. A rear-stage transmission unit 8r configured by the timing chain 15 and a relay transmission unit 8t that transmits the rotational motion of the output gear 14e of the second relay gear unit 14 to the sprocket Gs are provided. In this case, the relay transmission unit 8t includes a sprocket input gear 51 coaxially arranged with respect to the sprocket Gs, and a timing chain 52 bridged between the sprocket input gear 51 and the output gear 14e. Reference numeral 53 indicates a cover that covers the relay transmission unit 8t.

Further, the rotation transmission mechanism unit 8 on the right side is also configured in the same manner as the rotation transmission mechanism unit 8 on the left side described above, except that the rotation transmission mechanism unit 8 on the right side is symmetrical. When configuring the rotation transmission mechanism units 8 and 8, the left and right sides are composed of the first relay gear units 12 and 12 arranged on the rotation units R and R and the timing chains 13 and 13 bridged between the intermediate gear units Gm and Gm. It was bridged between the front transmission portions 8f and 8f of the above, and the second relay gear units 14 and 14 and the first relay gear units 12 and 12 arranged at the lower ends of the first frame Fa, Fa or the second frames Fb and Fb. Left and right rear transmission units 8r and 8r configured by timing chains 15 and 15 and left and right relay transmission units 8t and 8t that transmit the rotational motion of the second relay gear units 14 and 14 to the sprockets Gs and Gs are provided. If configured, even when the expansion / contraction strokes of the X-link mechanisms 4x and 4x in the vertical direction are different, it is possible to eliminate the uselessness of the timing chains 13 ..., 15 ... and the occurrence of slack and tension. , 3 can be independently raised and lowered reliably and stably, and the reliability of operation can be improved.

Next, the operation (function) of the main part of the multipurpose agricultural work machine 1 according to the present embodiment will be described with reference to FIGS. 1 to 7.

First, when the multipurpose agricultural work machine 1 is traveling, the drive source unit 6p having a built-in engine is driven to rotate the first output shaft 41 of the traveling system. This rotation is the rotation of the first gears 47 and 47 arranged at both left and right ends via the output pulley 43 → timing belt 46 → transmitted pulley 45 → transmission shaft 44. That is, the rotational motion output from the drive source unit 6p is distributed in two directions, left and right.

The rotation of the left and right first gears 47 and 47 is transmitted to the left and right intermediate gear units Gm and Gm via the corresponding timing chains 48 and 48, respectively, and the rotation of the left and right intermediate gear units Gm and Gm is further transmitted. Each intermediate gear unit Gm, Gm → left and right timing chains 13, 13 → left and right first relay gear units 12, 12 → left and right timing chains 15, 15 → left and right second relay gear units 14, 14 → left and right Timing chains 52, 52 → Transmitted to the left and right sprockets Gs, Gs via the left and right input gears 51, 51. As a result, the left and right sprockets Gs and Gs rotate, that is, the crawler belts 29 and 29 in the left and right crawler portions 3.3 are swiveled and driven, and the multipurpose agricultural work machine 1 runs (self-propelled). During traveling, by operating the operation unit 6c including the control unit 9, various operations related to traveling such as traveling, stopping, and steering (direction change) can be performed.

On the other hand, by driving and controlling the left and right drive cylinders 11 and 11 by the control unit 9, the X-link mechanisms 4x and 4x can be expanded and contracted in the vertical direction as shown in FIG. 4, and the height of the loading platform 2 can be increased and decreased. You can set it to any height you need. Further, by independently driving and controlling the left and right drive cylinders 11 and 11, the expansion and contraction strokes of the left and right X-link mechanisms 4x and 4x in the vertical direction can be made different. In this case, since the rotation transmission mechanism portions 8 and 8 perform rotation transmission via the support shaft portions 34 and 34, the rotation portions R and R, and the support shaft portions 31 and 31, the left and right X-link mechanisms 4x , Even when the expansion and contraction strokes of 4x in the vertical direction are different, it is possible to eliminate the uselessness of timing chains 13, 13 ... It is possible to improve the reliability of operation as well as to improve the reliability of operation.

As a result, the heights of the left and right crawler portions 3 and 3 can be made relatively different. Therefore, not only in a normal flat field but also in a field provided on an inclined surface as shown in FIG. Even in the traveling place, it is possible to travel in a state where the upper surface 2u of the loading platform 2 is maintained almost horizontally, and for example, even liquid fertilizer contained in a bucket or the like can be easily transported, so that stable transportation can be performed. And work can be performed, and safety and workability can be further improved. As a result, it is possible to meet the user's request to use it in various fields and running places without being influenced by flat land and slope, and it is possible to increase versatility by expanding the range of use. In FIG. 1, U ... indicates ridges having different heights, V ... indicates vegetables cultivated by ridges U ..., and K ... indicates passages between ridges U ....

Further, the width size of the Dx in the left-right direction of the loading platform 2 can be arbitrarily changed, and can be easily changed without selecting the changing place.

Hereinafter, this change method will be described with reference to FIGS. 6 and 7. First, the control unit 9 drives and controls the left and right drive cylinders 11 and 11 to displace the height of the loading platform 2 to a predetermined position where the size can be changed. In this case, as shown in FIG. 7, the predetermined position is a position where the support columns 17 and 17 can be rotationally displaced and displaced downward from the loading platform 2 to the use position Xu. It is a position where a predetermined gap is generated between the lower end of 17 and the ground E. Therefore, this predetermined position can be set in advance, and the drive cylinders 11 and 11 can be controlled so as to stop at this predetermined position.

When the support columns 17 and 17 are set at the use position Xu, the left and right drive cylinders 11 and 11 are shortened at the same time. Then, when the two support columns 17 and 17 are grounded, the drive cylinder 11 on the right side is driven and controlled to shorten only the X-link mechanism 4x on the right side. As a result, the crawler portion 3 on the right side rises, so that if a predetermined gap Lu is generated between the crawler portion 3 and the ground E, the control of the drive cylinder 11 is stopped. FIG. 7 shows this state.

Then, in this state, if the operation handle 24h in the expansion / contraction adjusting portion 16a is rotated and operated, the loading platform right portion 2s is displaced forward and backward with respect to the loading platform left portion 2m, and the guide mechanism portion 16g with respects the loading platform left portion 2m. Translate. FIG. 6 shows a state in which the right portion 2s of the loading platform, which is the most downsized position shown by the virtual line, is moved to a predetermined size-up position shown by the solid line.

After moving to the target size position, the drive cylinder 11 on the right side is driven and controlled again, and only the X-link mechanism 4x on the right side is extended. As a result, the crawler portion 3 on the right side descends and comes into contact with the ground E, and after the abutment, the right side of the loading platform portion 2 rises. When the above occurs, the drive of the drive cylinder 11 is stopped. After that, the support columns 17 and 17 are rotationally displaced so as to be overlapped with the lower surface portion 2md of the loading platform left portion 2m and held at the storage position Xr by the holding portion 17c.

As described above, according to the multipurpose agricultural work machine 1, the support columns 17 and 17 are used, and by combining with the independent elevating and lowering functions of the crawlers 3 and 3, the size of the loading platform 2 can be changed and the crawlers 3 can be used. The interval adjustment between the three can be easily performed without difficulty. As a result, it is possible to match the ridge spacing of the field and the like, and it is possible to contribute to the improvement of workability and the improvement of safety when using the multipurpose agricultural work machine 1.

Next, the attachment configuration of the multipurpose agricultural work machine 1 according to the present embodiment will be described with reference to FIGS. 2, 8-12.

The multipurpose agricultural work machine 1 can be used by attaching various attachments in addition to the basic configuration as the above-mentioned carrier. As an example, in the present embodiment, a case where the chemical liquid spraying device 18 utilizing the driving force of the second output shaft 42 described above is mounted will be described.

The chemical spraying device 18 includes a main body unit 18m and a nozzle unit 18n. The main body unit 18m includes a rectangular base frame 61 shown in FIG. 9, and as shown in FIG. 8, a chemical liquid tank 62, a liquid feeding pump 63, an operation control unit 64, and the like are arranged on the upper surface of the base frame 61. To configure. On the other hand, the nozzle unit 18n is a unit generally called a boom, and as shown in FIGS. 10 and 11, a support frame 65 long in the left-right direction Dx is provided, and a pair of left and right mountings provided at both ends of the support frame 65. The portions 67, 67 support the support posts 66, 66, which are long in the vertical direction, in an adjustable vertical position. Further, an intermediate position of an intermediate nozzle stay 68m long in the left-right direction Dx is attached to the lower ends of the support posts 66, 66, and one end of the left nozzle stay 68p is attached to the left end of the intermediate nozzle stay 68m so as to be able to swivel in the vertical direction. At the right end of the intermediate nozzle stay 68m, one end of the right nozzle stay 68q is attached so as to be able to swivel in the vertical direction. Then, spray nozzles n ... for spraying the chemical solution downward are attached at predetermined intervals in the longitudinal direction of each nozzle stay 68m, 68p, 68q. Further, a continuous chemical solution supply tube 69 is arranged along each nozzle stay 68m, 68p, 68q, and each spray nozzle n ... Is communicated and connected to the middle position of the chemical solution supply tube 69. As a result, as shown in FIG. 11, the left nozzle stay 68p is rotationally displaced upward at a horizontal usage position Wu shown by a virtual line or upward at a substantially right angle with respect to the intermediate nozzle stay 68m, and the upper end of the support post 66 is formed. It can be located at the unused position Wn shown by the solid line held by. Further, the right nozzle stay 68q is also configured in the same manner as the left nozzle stay 68p side.

Since the chemical liquid spraying device 18 includes a main body unit 18m and a nozzle unit 18n, an installation portion 19 on which the chemical liquid spraying device 18 can be positioned and installed is provided at a predetermined position on the upper surface 2u of the loading platform portion 2. As the installation portion 19, as shown in FIGS. 2, 8 and 11, a plurality of holding holes Ha ..., Hb ... Penetrating vertically are provided on the upper surface 2u of the loading platform portion 2. Configure. That is, two holding holes Ha and Ha separated to the left and right on which the nozzle unit 18n is installed are provided on the upper surface 2u near the front end of the left portion 2 m of the loading platform 2 and the upper surface 2u behind the hole Ha ... A total of five holding holes Hb, Hb ... for mounting the main body unit 18 m are provided at predetermined positions dispersed therein.

Therefore, as shown in FIG. 11, the nozzle unit 18n is provided with downwardly projecting protrusions Pa and Pa that are inserted and held in the holding holes Ha and Ha, and the main body unit 18m is shown in the figure. As shown in 8, the holding holes Hb, Hb ... Are provided with downwardly projecting protrusions Pb, Pb ... Which are inserted and held, and the protrusions Pa ... And Pb ... When inserted, a stopper pin is penetrated and mounted between the protrusions Pa ... And Pb ... and the holding holes Ha and Hb ... to prevent detachment. Therefore, if such an installation unit 19 is provided, the optimum installation unit 19 can be constructed for the chemical liquid spraying device 18 to be mounted, so that the chemical liquid spraying device 18 can be reliably and stably mounted on the multipurpose agricultural work machine 1. At the same time, it is possible to increase diversity and versatility together with the transportation function.

Further, the chemical liquid spraying device 18 can be attached to and detached from at least a part of the units of the chemical liquid spraying device 18, specifically, the main body unit 18m, and can hold the main body unit 18m at a predetermined height when mounted. A plurality of support legs 21 ... (2 in the example) shown in FIG. 12 are provided. Since the support leg portion 21 shown in FIG. 12 is drawn from the rear view, only the rear leg portion 21r on the rear side appears, but as shown by a virtual line in FIG. 9, the support leg portion 21 is similarly configured on the front side. The front leg portion 21f is present, and has a configuration in which the front leg portion 21f is connected by the link portion 21m. In this case, the distance between the front leg portion 21f and the rear leg portion 21r is the same as the distance between the front and rear frame members 61f and 61r constituting the rectangular base frame 61. Therefore, the frame horizontal portions 21fh and 21rh of the support leg portion 21 are inserted and mounted inward from the tip side through the end openings of the frame members 61f and 61r of the base frame 61 formed of the pipe member having a rectangular cross section. You can pull it out and leave it. FIG. 12 shows a state in which the main body unit 18m is supported by two support legs 21 and 21 arranged on the left and right and is placed in a predetermined storage place. The nozzle unit 18n can be hung from a hook or the like provided on the support leg 21 and stored. In addition, in the figure, 71 ... Indicates a moving caster provided on the support leg portion 21.

Since the support leg portion 21 ... Is attached to the chemical liquid spraying device 18, the main body unit 18 m can be easily mounted or removed from the loading platform portion 2. Hereinafter, the specific mounting procedure will be described with reference to each figure.

First, as shown in FIG. 12, the main body unit 18m supported by the support legs 21 and 21 is moved to position the main body unit 18m above the loading platform 2 of the multipurpose agricultural work machine 1. Then, the drive cylinders 11 and 11 of the multipurpose agricultural work machine 1 are driven and controlled to raise the loading platform portion 2, and if the loading platform portion 2 approaches the main body unit 18m, the ascending is temporarily stopped and the main body unit 18m is raised to the loading platform portion. Positioning more accurately with respect to the installation portion 19 of 2. Therefore, positioning may be made easier by providing a positioning function portion with a contact portion between the base frame 61 and the loading platform portion 2. After accurate positioning, the loading platform 2 is raised again. Then, the protrusions Pb ... Are inserted into the holding holes Hb ..., and the main body unit 18 m is mounted on the loading platform 2, so that the support legs 21 and 21 are slightly separated from the ground E. When it becomes, stop the climb. As a result, the support legs 21 and 21 can be easily removed from the main body unit 18 m.

In this way, the chemical solution spraying device 18 is provided with support legs 21 that can be attached to and detached from at least a part of the units of the chemical solution spraying device 18 and can hold the unit 18m at a predetermined height when mounted. Therefore, even if the unit is large and heavy, the unit can be easily and efficiently mounted and removed from the loading platform 2 by one operator.

If the main body unit 18m is mounted on the upper surface 2u of the loading platform 2, the rotation input unit 18i provided in the main body unit 18m is coupled to the rotation drive unit 6. That is, as shown in FIG. 9, the main body unit 18m is provided with a liquid feed pump 18p and a rotation input unit 18i for inputting rotation for driving the liquid feed pump 18p. The rotation input unit 18i is connected to the liquid feed pump 18p via the rotation transmission mechanism 72. On the other hand, as shown in FIG. 9, the rotation drive unit 6 is provided with the above-mentioned second output shaft 42. In this case, when the main body unit 18m is mounted on the loading platform 2, the rotation input unit 18i is located coaxially with the second output shaft 42 and faces the second output shaft 42 via a predetermined interval.

Therefore, the rotation transmission member 20 is used to connect the second output shaft 42 and the rotation input unit 18i so as to be rotatable. The rotation transmission member 20 can be configured in the shape of a shaft that can be elastically expanded and contracted, for example. As a result, one end of the rotation transmission member 20 can be attached to the rotation input unit 18i, and the other end of the rotation transmission member 20 can be attached to the second output shaft 42, whereby the rotation output of the second output shaft 42 can be increased. , The rotation transmission member 20 → the rotation input unit 18i → the rotation transmission mechanism 72 → the liquid feed pump 18p, and the rotation drive unit 6 drives the liquid feed pump 18p. The rotation transmission member 20 can be replaced by other rotation transmission means having a similar function, such as a propeller shaft.

In this way, the chemical liquid spraying device 18 (main body unit 18m) is provided with a rotary input unit 18i for rotating the built-in liquid feed pump 18p, and the rotary input unit 18i is subjected to a rotary motion output from the rotation drive unit 6. If the rotation transmission member 20 for transmission is provided, the power source of the chemical liquid spraying device 18 can be shared with the rotary drive unit 6 of the multipurpose agricultural work machine 1, which contributes to cost reduction, weight reduction and miniaturization of the chemical liquid spraying device 18. can.

Further, as shown in FIG. 11, the nozzle unit 18n is installed by inserting the protrusions Pa and Pa into the holding holes Ha and Ha. FIG. 10 shows a state in which the nozzle unit 18n is installed on the loading platform portion 2. Then, by making the necessary connections in the piping system and the electrical system of the main body unit 18m to the multipurpose agricultural work machine 1, and connecting the necessary piping system in the nozzle unit 18n to the main body unit 18m, the chemical solution is used. The spraying device 18 can be used.

Although the preferred embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the present invention does not deviate from the gist of the present invention in terms of detailed configuration, shape, material, quantity, numerical value, and the like. It can be changed, added, or deleted arbitrarily within the range.

For example, as the configuration of the rotary drive unit 6, the timing chains 13 ..., 15 ... Are preferably metal chain chains, but may be transmission belts. In the case of transmission belts, pulleys are used instead of gears. Can be used. In addition, by providing the left part of the loading platform 2m and the right portion of the loading platform 2s divided into left and right, and the left portion of the loading platform 2m and the right portion of the loading platform 2s, the left portion of the loading platform and the right portion of the loading platform 2s are increased in size or downsized in the left-right direction Dx. Although the case where it is configured to include the connecting mechanism portion 16 that enables it is shown, it is not an indispensable component, and if necessary, only the loading platform portion 2 may be configured to be able to be upsized or downsized. In this case, it can be realized by forming a double-layered structure of the loading platform 2 and sliding the plate on the upper surface side. Further, although the case where the two support columns 17 and 17 are provided is illustrated, one may be provided, or by providing three or more, it is possible to use them properly depending on the unevenness of the ground or the like. Further, although the case where the two support columns 17 and 17 are retractably attached to the lower surface 2 md of the loading platform 2 is illustrated, they may be configured as independent accessories and can be used when necessary. good. Although the chemical spraying device 18 is exemplified as a functional device that can be mounted on the upper surface of the loading platform 2, various other functional devices such as a crop harvesting device can be mounted, and the optimum installation section 19 should be provided for each functional device. Can be done.

The multipurpose agricultural work machine according to the present invention can be used for various purposes such as transportation of agricultural products in agricultural work and spraying of chemicals on agricultural products.

1: Multipurpose agricultural work machine, 2: Loading platform part, 2m: loading platform left part, 2md: lower surface of loading platform left part, 2s: loading platform right part, 2u: upper surface of loading platform part, 3: crawler part, 4: elevating part, 4x: X-link mechanism, 5: drive mechanism, 6: rotation drive, 7: rotation branch mechanism, 8: rotation transmission mechanism, 8f: front transmission, 8r: rear transmission, 8t: relay transmission, 9: Control unit, 11: Drive cylinder, 12: First relay gear unit, 13: Timing chain, 14: Second relay gear unit, 15: Timing chain, 16: Coupling mechanism unit, 17: Strut unit, 17s: Rotating unit , 18: Chemical spraying device, 18p: Liquid feeding pump, 18i: Rotation input unit, 18m: Some units (main unit), 19: Installation unit, 20: Rotation transmission member, 21: Support legs, Fa: No. 1 frame, Fb: 2nd frame, R: rotating part, Gm: intermediate gear unit, Gs: sprocket, Dx: left-right direction, Xu: used position, Xr: stored position

Claims (8)

The X-link mechanism, which is arranged between the loading platform portion, the crawling portions arranged on the left and right, the loading platform portion and each of the crawler portions, and the intermediate position between the first frame and the second frame is connected via the rotating portion, is used. In a multipurpose agricultural work machine including at least a lift unit arranged on the left and right to raise and lower the loading platform portion and a drive mechanism unit for driving each crawler portion, a rotary drive unit arranged on the loading platform portion and an output from the rotary drive unit. A rotary branch mechanism unit that transmits the rotational movement to be transmitted to the left and right intermediate gear units arranged at the upper end of one of the first frame or the second frame in each elevating part, and the rotational movement of each intermediate gear unit. Is provided with a drive mechanism unit having rotation transmission mechanism units arranged on the left and right to transmit to the sprocket of each crawler unit along the first frame and the second frame, and each elevating unit. A multipurpose agricultural work machine characterized in that each of the crawler units is provided with a control unit capable of independently raising and lowering each of the crawler units by selecting and controlling each of the above. The multipurpose agricultural work machine according to claim 1, wherein the elevating unit includes a drive cylinder that changes the inclination angle of the first frame or the second frame. Each rotation transmission mechanism unit includes a left and right front stage transmission unit configured by a timing chain spanned between a first relay gear unit arranged in the rotation unit and an intermediate gear unit, and the first frame or the second. The left and right rear transmission units configured by the second relay gear unit arranged at the lower end of the frame and the timing chain spanned between the first relay gear units, and the rotational movement of the second relay gear unit are transferred to the sprocket. The multipurpose agricultural work machine according to claim 1 or 2, wherein the left and right relay transmission units for transmission are provided. The loading platform portion is characterized by including a left and right loading platform left portion and a loading platform right portion, and a connecting mechanism portion that is slidably connected by being provided between the loading platform left portion and the loading platform right portion. The multipurpose agricultural work machine according to claim 1. The loading platform portion is a use position or the above-mentioned that projects downward from the lower surface by attaching one end to the left portion of the loading platform or the right portion of the loading platform at a position separated from the front and rear on one lower surface via a rotating portion. The multipurpose agricultural work machine according to claim 4, further comprising at least one support column that can be displaced to a storage position that overlaps the lower surface. The loading platform portion is attached to the loading platform portion and is provided with a chemical solution spraying device for spraying the chemical solution, and is provided with an installation portion in which the chemical solution spraying device can be positioned and installed at a predetermined position on the upper surface of the loading platform portion. The multipurpose agricultural work machine according to claim 1. The chemical liquid spraying device is characterized by including a rotary input unit for rotating a built-in liquid feed pump, and a rotation transmission member for transmitting the rotational movement output from the rotation drive unit to the rotation input unit. The multipurpose agricultural work machine according to claim 6. 6. The multipurpose agricultural work machine described in 7.

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