Riding controller and under guard

Abstract

To provide a riding controller having an under guard allowing attachment work to be carried out easier.SOLUTION: A riding controller is provided with an under guard 100 attached on a traveling body 2. The under guard 100 is provided with a front plate-like body 110 in a plate shape fixed on the traveling body 2 to cover a front axle 8 from below; a rear plate-like body 120 in a plate shape fixed on the traveling body 2 at a position apart from the front plate-like body 110 in a longitudinal direction to cover a rear axle 9 from below; and an intermediate sheet body 130 in a sheet shape connected to the front plate-like body 110 and the rear plate-like body 120 to cover the traveling body 2 from below.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a ride-on management machine and an underguard. [Background technology]

[0002] Patent Document 1 discloses an underguard (undercover) for protecting the bottom of an agricultural tractor body from crops. This underguard is attached to the front of the agricultural tractor body so as to cover the front and bottom of the front axle. For example, the underguard is made of a plate material or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-69741 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, since the underguard only covers the front axle, the bottom of the vehicle body may be damaged in the area behind the front axle by hitting crops. Therefore, it may be considered to cover the entire bottom of the vehicle body in the front-rear direction with the underguard. However, if the entire bottom of the vehicle body is covered with the underguard in the front-rear direction, it is necessary to prepare a larger size underguard, and the installation work of the underguard may become large-scale.

[0005] The present disclosure aims to provide a ride-on management machine having an underguard that allows installation work to be performed more easily. [Means for solving the problem]

[0006] In one embodiment of the present disclosure, the ride-on management machine comprises a running body (2) including a body frame (4), a first axle (8) provided on the body frame (4), and a second axle (9) provided on the body frame (4) at a position spaced apart from the first axle (8) in the fore-and-aft direction, a plate-shaped first member (110) fixed to the running body (2) and covering the first axle (8) from below, a plate-shaped second member (120) fixed to the running body (2) at a position spaced apart from the first member (110) in the fore-and-aft direction and covering the second axle (9) from below, and a sheet-shaped third member (130) connected to the first member (110) and the second member (120) and covering the running body (2) from below.

[0007] In the above-mentioned riding management machine, a first member (110) that covers the first axle (8) from below, a second member (120) that covers the first axle (8) from below, and a third member (130) that covers the traveling body (2) from below are connected to each other, and an underguard is formed by the first member (110), the second member (120), and the third member (130). This underguard protects the vehicle from below over a wide range in the fore-and-aft direction of the vehicle, including the first axle (8) and the second axle (9). The third member (130), which is located in the middle in the fore-and-aft direction, is formed in a sheet shape, making it easy to handle. This makes it easy to install the underguard.

[0008] As an example, the first axle (8) may be provided to be able to swing relative to the body frame (4), and the first member (110) may be fixed to the first axle (8). In this configuration, interference between the swinging first axle (8) and the first member (110) is suppressed, and therefore the first member (110) can be brought closer to the first axle (8) in the height direction.

[0009] In one example, the second member (120) may be fixed to the second axle (9). In this case, it is easy to arrange the second member (120) close to the second axle (9) and easy to arrange the second member (120) below the second axle (9).

[0010] The riding management machine of the example may further include an adjustment mechanism (M) for adjusting the position of the second member (120) in the front-rear direction relative to the second axle (9). In this configuration, slack in the third member (130) formed in a sheet shape can be eliminated.

[0011] The adjustment mechanism (M) may have a bracket (122) attached to the second member (120) to fix the second member (120) to the second axle (9), and an adjustment member (124) that adjusts the attachment position of the bracket (122) relative to the second member (120). In this configuration, the position of the second member (120) relative to the second axle (9) can be adjusted.

[0012] The second member (120) in one example has long holes 123a, 123b penetrating in the up-down direction and extending in the front-rear direction, and is fixed to the second axle (9) by a bracket (122) positioned on the second member (120) by fastening members inserted into the long holes (123a, 123b), and the adjustment mechanism (M) may have a regulating member (124e) that regulates the attachment position of the bracket (122) relative to the second member (120). With this configuration, the position of the second member (120) relative to the second axle (9) can be adjusted.

[0013] As an example, a slit (120a) that penetrates in the vertical direction may be formed in the second member (120). With this configuration, water can be prevented from accumulating on the upper surface of the second member (120).

[0014] The traveling body 2 in one example has a tie rod 8b that swings together with the first axle 8 of the vehicle body frame 4 at a position spaced from the first axle 8 in the front-rear direction, and the first member 110 may cover the tie rod 8b from below. In this configuration, the first axle 8 and the tie rod 8b can be effectively protected. Effect of the Invention

[0015] According to the present disclosure, it is possible to provide a ride-on management machine having an underguard that allows installation work to be performed more easily. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of a riding management machine according to an embodiment of the present disclosure, viewed obliquely from above. [Diagram 2] FIG. 2 is a perspective view for explaining a vehicle body frame of a riding management machine according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 is a perspective view of a riding management machine according to an embodiment of the present disclosure, viewed diagonally from below. [Figure 4] FIG. 2 is an exploded perspective view showing an example of an underguard. [Diagram 5] FIG. 2 is a perspective view showing an example of an underguard attached to an axle. [Figure 6] FIG. 6 is a partially enlarged view of FIG. 5, showing the connection portion between the front axle and the underguard. [Figure 7] FIG. 6 is a partially enlarged view of FIG. 5, showing a connection portion between the rear axle and the underguard. [Figure 8] FIG. 2 is a plan view of an example of an underguard viewed from the bottom side. [Figure 9] FIG. 9 is a partially enlarged view of FIG. 8. [Figure 10] 13 is a side view illustrating an example of an adjustment mechanism for adjusting the relative position between a rear axle and an underguard. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A boom sprayer, which is an example of a riding management machine according to the present disclosure, will be described below with reference to the attached drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated descriptions will be omitted. Unless otherwise specified, terms indicating directions such as "front", "rear", "left", "right", "up", and "down" are based on the boom sprayer placed on a horizontal surface so that it can travel. In addition, in the description, the XYZ Cartesian coordinate system shown in the drawings will be appropriately referenced.

[0018] FIG. 1 is a perspective view of an example boom sprayer as viewed from the upper right front. FIG. 2 is a diagram for explaining the frame structure of the boom sprayer. The example boom sprayer 1 shown in FIG. 1 is a self-propelled riding management machine equipped with a traveling machine body 2 and a boom device 3 which is a chemical solution spraying device. The boom sprayer 1 sprays a chemical solution (chemical) stored in a chemical solution tank 10 while traveling the traveling machine body 2 in a farm field. The boom sprayer 1 performs predetermined agricultural work such as spraying a chemical solution based on various operations by a driver (user).

[0019] As shown in FIG. 2, the traveling machine body 2 includes a vehicle body frame 4, a front axle 8 (first axle), and a rear axle 9 (second axle). The vehicle body frame 4, as an example, has a generally rectangular frame shape that is long in the front-rear direction, and constitutes the skeleton of the traveling machine body 2. The vehicle body frame 4 may include a plurality of reinforcing frames inside the rectangular frame. As shown in FIG. 1, a liquid medicine tank 10 is disposed in the center of the vehicle body frame 4 in the front-rear direction. A recess is formed in the center of the front end of the liquid medicine tank 10, and a driver's seat 11 where a driver sits is provided in this recess. An engine room 13 is provided behind the liquid medicine tank 10. The engine room 13 is provided with an engine as a driving source, a spray pump for spraying liquid medicine, and the like.

[0020] As shown in Figure 2, the front axle 8 is supported by the lower part of the body frame 4 at the front of the body frame 4. The front axle 8 extends in the width direction (Y direction) of the traveling body 2, and its length is longer than the width of the body frame 4. The front wheels 6 are attached to both ends of the front axle 8 via knuckles 8a extending in the vertical direction. The front axle 8 has spacers 85 (see Figure 5) at both ends for length adjustment.

[0021] In this embodiment, the front axle 8 is provided to be able to swing relative to the body frame 4, with a shaft 84 (see FIG. 5) provided at the center of the front axle 8 in the left-right direction as a swing axis. The shaft 84 (swing axis) extends horizontally along the front-to-rear direction. The traveling machine body 2 is provided with a tie rod 8b that swings together with the front axle 8 at a position spaced rearward from the front axle 8 of the body frame 4. The tie rod 8b is connected to a knuckle 8a.

[0022] The rear axle 9 is supported by the lower part of the body frame 4 at the rear of the body frame 4. That is, the rear axle 9 is provided at a position on the body frame 4 spaced rearward from the front axle 8. The rear axle 9 extends in the width direction of the traveling body 2, and its length is longer than the width of the body frame 4. Rear wheels are attached to both ends of the rear axle 9 via knuckles 9a extending in the vertical direction. For example, the rear axle 9 has spacers 95 (see FIG. 5) at both ends for length adjustment.

[0023] In the example boom sprayer 1, the front wheels 6 and the rear wheels 7 are driven to rotate, enabling the vehicle to travel in four-wheel drive. The example rear axle 9 is fixed to the vehicle body frame 4 so as not to swing. The traveling machine body 2 is provided with a tie rod 9b at a position spaced forward from the rear axle 9 of the vehicle body frame 4. The tie rod 9b is connected to a knuckle 9a.

[0024] The boom device 3 is provided at the front of the vehicle body frame 4. An example of the boom device 3 has a lifting device 22, a center boom 21, and a pair of side booms 23. The lifting device 22 is configured by a four-joint link mechanism. The lifting device 22 is supported at the front end of the vehicle body frame 4 so as to protrude forward from the vehicle body frame 4. The lifting device 22 is configured so that the front end side moves up and down, for example, by the operation of a hydraulic cylinder. The center boom 21 is provided at the front end of the lifting device 22 and extends along the left-right direction. For example, the center boom 21 is supported so as to be able to swing left and right in a pendulum-like manner relative to the lifting device 22. The pair of side booms 23 are supported at both ends of the center boom 21, respectively. The side booms 23 are configured to be operable to rotate between an unfolded position in which they are opened relative to the traveling body 2 and a stored position in which they are folded toward the traveling body 2. For example, the base end of the side boom 23 is rotatably supported relative to the center boom 21, and can be deployed and retracted by the operation of a hydraulic cylinder provided between the center boom 21 and the side boom 23.

[0025] A nozzle pipe 24 is attached to each of the center boom 21 and the side boom 23. A nozzle 25 for spraying the chemical solution is provided on each nozzle pipe 24. A plurality of nozzles 25 for spraying the chemical solution are provided along the longitudinal direction with the spray direction facing downward. For example, when spraying the chemical solution, the side boom 23 can be deployed from the state shown in FIG. 1 so as to be in a straight line with the center boom 21. Then, the chemical solution pressure delivery pump is driven while traveling by driving the engine, and the chemical solution in the chemical solution tank 10 is sprayed from the nozzle 25 via the nozzle pipes 24 of the center boom 21 and the side boom 23.

[0026] An example of the boom sprayer 1 according to this embodiment is provided with an underguard 100 for protecting the bottom surface of the traveling body 2 from crops in a field. FIG. 3 is a perspective view of the example of the boom sprayer as viewed from the front lower left. FIG. 4 is an exploded perspective view showing an example of the underguard. FIG. 5 is a perspective view showing a state in which the example of the underguard is attached to an axle. FIG. 6 is a partially enlarged view of FIG. 5, showing a connection portion between the front axle and the underguard. FIG. 7 is a partially enlarged view of FIG. 5, showing a connection portion between the rear axle and the underguard. FIG. 8 is a plan view of the example of the underguard as viewed from the bottom side. FIG. 9 is a partially enlarged view of FIG. 8.

[0027] The underguard 100 in this embodiment includes a front plate body 110 (first member), a rear plate body 120 (second member), and an intermediate sheet body 130 (third member). The front plate body 110 is a plate-shaped member that is fixed to the traveling body 2 and covers the front axle 8 from below. In this embodiment, the front plate body 110 covers the front axle 8 and the tie rod 8b that is disposed adjacent to the rear of the front axle 8 from below. In other words, a portion of the front plate body 110 is disposed vertically below the front axle 8 and the tie rod 8b.

[0028] The front plate-like body 110 includes a bottom wall portion 111 and a front wall portion 115. The bottom wall portion 111 has a rectangular plate shape. The length of the bottom wall portion 111 in the front-rear direction (X direction) may be longer than the distance from the front end of the front axle 8 to the rear end of the tie rod 8b. The length of the bottom wall portion 111 in the left-right direction (Y direction) may be longer than the left-right length of the body frame 4 and shorter than the overall length of the front axle 8 including the spacer 85.

[0029] The bottom wall portion 111 is provided with a slit 111a penetrating the bottom wall portion 111. In a plan view, the slit 111a extends linearly along the front-rear direction. In the illustrated example, a plurality of slits 111a are formed in a group on the right and left sides of the center in the left-right direction of the bottom wall portion 111. In addition, the bottom wall portion 111 is formed with a through hole 111b for accessing the bottom of the traveling body 2. As an example, the through hole 111b is formed in the center in the left-right direction of the bottom wall portion 111. A grommet may be provided in the through hole 111b.

[0030] The front wall portion 115 protrudes upward from the front end of the bottom wall portion 111. The length of the front wall portion 115 in the left-right direction may be the same as the length of the bottom wall portion 111 in the left-right direction. The front wall portion 115 in the illustrated example has an inclined portion 116 extending obliquely upward and forward from the front end of the bottom wall portion 111, and a front end portion 117 extending from the tip of the inclined portion 116 along the YZ plane. In the up-down direction, the upper end of the front end portion 117 is located above the shaft portion of the front axle 8. The front plate-like body 110 is formed of a hard material. For example, the front plate-like body 110 may be formed of a metal processed into a plate shape (so-called sheet metal). As an example, the front plate-like body 110 may be formed of a cold-rolled steel plate (SPCC), stainless steel (SUS304), or the like.

[0031] The front plate-like body 110 is fixed to the traveling machine body 2. In one example, the front plate-like body 110 may be fixed to the front axle 8. The front axle 8 in this embodiment has spacers 85 for length adjustment at both ends. The front axle 8 in one example has a housing main body 81 that constitutes the center of the front axle 8, and a first spacer 86 and a second spacer 87 that are connected to both ends of the housing main body 81, respectively. Flanges are formed on both ends of the housing main body 81, both ends of the first spacer 86, and both ends of the second spacer 87. Note that the first spacer 86 and the second spacer 87 in the illustrated example have the same shape.

[0032] The housing body 81 and the first spacer 86 are connected to each other by fixing flanges 81a, 86a formed on each other with bolts 89a. The first spacer 86 and the second spacer 87 are connected to each other by fixing flanges 86b, 87a formed on each other with bolts 89b. The flange 81a of the housing body 81 may be located, for example, on the outer side of the body frame 4 in the width direction.

[0033] For example, a first bracket 112 and a second bracket 118 are attached to the front plate body 110 according to this embodiment for fixing the front plate body 110 to the front axle 8. The first bracket 112 is provided on a bottom wall portion 111 of the front plate body 110. The first bracket 112 is, for example, an L-shaped fixing metal fitting, and has a flat first portion 112a along the XY plane and a flat second portion 112b along the XZ plane. The first portion 112a is fixed to the bottom wall portion 111 of the front plate body 110 by fastening members 112a1 (bolts and nuts) (see FIG. 6).

[0034] In one example, a pair of first brackets 112 are attached to the bottom wall portion 111 of the front plate body 110 with a space between them in the Y direction. In the illustrated example, the pair of first brackets 112 are attached to both ends of the front plate body 110 in the Y direction. When the pair of first brackets 112 are attached to the front plate body 110, the distance between the second portions 112b of the pair of first brackets 112 is equal to the distance between the flanges of the pair of spacers 85 in the front axle 8.

[0035] The second portion 112b has a pair of bolt holes 112b1 formed spaced apart in the X-axis direction. The second portion 112b of the first bracket 112 is fixed to the front axle 8 by a bolt. In one example, the second portion 112b of the first bracket 112 may be fixed to a flange formed on a spacer 85 of the front axle 8 by a bolt. In the illustrated example, the second portion 112b of the first bracket 112 is fixed to the flange 86b of the first spacer 86 by a bolt 89b that connects the first spacer 86 and the second spacer 87 to each other (see FIG. 6).

[0036] The second bracket 118 is provided on the front end 117 of the front plate-like body 110. The second bracket 118 is, for example, an L-shaped fixing metal fitting, and has a flat first portion 118a along the YZ plane and a flat second portion 118b along the XZ plane. The first portion 118a is fixed to the front end 117 of the front plate-like body 110 by fastening members 118a1 (bolts and nuts).

[0037] In one example, the pair of second brackets 118 are attached to the front end portion 117 of the front plate body 110 with a space therebetween in the Y direction. In the illustrated example, the pair of second brackets 118 are attached to both ends of the front plate body 110 in the Y direction. With the pair of second brackets 118 attached to the front plate body 110, the distance between the second portions 118b of the pair of second brackets 118 is equal to the distance between the flanges of the pair of spacers 85 in the front axle 8.

[0038] The second portion 118b has a pair of bolt holes 118b1 formed at two spaced apart locations. The second portion 118b of the second bracket 118 is fixed to the front axle 8 by a bolt. In one example, the second portion 118b of the second bracket 118 may be fixed to a flange formed on a spacer 85 of the front axle 8 by a bolt. In the illustrated example, the second portion 118b of the second bracket 118 is fixed to the flange 86b of the first spacer 86 by a bolt 89b that connects the first spacer 86 and the second spacer 87 to each other.

[0039] The rear plate body 120 is a plate-shaped member that is fixed to the traveling body 2 and covers the rear axle 9 from below. In this embodiment, the rear plate body 120 covers the rear axle 9 and the tie rods that are arranged adjacent to each other in front of the rear axle 9 from below. In other words, a portion of the rear plate body 120 is arranged vertically below the rear axle 9 and the tie rods.

[0040] The rear plate-like body 120 includes a bottom wall portion 121 and a rear wall portion 125. The bottom wall portion 121 has a rectangular plate shape. The length of the bottom wall portion 121 in the front-rear direction (X direction) may be longer than the distance from the front end of the tie rod to the rear end of the front wall portion 115. The length of the bottom wall portion 121 in the left-right direction (Y direction) may be longer than the left-right length of the body frame 4 and shorter than the entire length of the rear axle 9 including the spacer. The bottom wall portion 121 is provided with a slit 121a penetrating the bottom wall portion 121. In a plan view, the slit 121a extends linearly along the front-rear direction. In the illustrated example, a plurality of slits 121a are formed in a group on the right and left sides of the center of the bottom wall portion 121 in the left-right direction. In addition, the bottom wall portion 121 is formed with a through hole 121b for accessing the bottom of the traveling body 2. The through hole 121b as an example is formed in the center in the left-right direction of the bottom wall portion 121. A grommet may be provided in the through hole 121b.

[0041] The rear wall portion 125 protrudes upward from the rear end of the bottom wall portion 121. The left-right length of the rear wall portion 125 may be the same as the left-right length of the bottom wall portion 121. The rear wall portion 125 in the illustrated example has an inclined portion 126 extending obliquely upward and rearward from the rear end of the bottom wall portion 121, and a rear end portion 127 extending from the tip of the inclined portion 126 along the YZ plane. In the up-down direction, the upper end of the rear end portion 127 is located above the shaft portion 9s of the rear axle 9. The rear plate-like body 120 is formed of a hard material. For example, the rear plate-like body 120 may be formed of the same material as the front plate-like body 110.

[0042] The rear plate-like body 120 is fixed to the traveling machine body 2. As an example, the rear plate-like body 120 may be fixed to the rear axle 9. The rear axle 9 in this embodiment has a housing main body 91 that constitutes the left-right center of the rear axle 9, and a cylindrical first spacer 96 and a cylindrical second spacer 97 that are connected to both ends of the housing main body 91, respectively. Flanges are formed on both ends of the housing main body 91, both ends of the first spacer 96, and both ends of the second spacer 97. Note that the first spacer 96 and the second spacer 97 in the illustrated example have the same shape.

[0043] The housing body 91 and the first spacer 96 are connected to each other by fixing flanges 91a, 96a formed on each of the housing body 91 and the first spacer 96 with bolts 99a. The first spacer 96 and the second spacer 97 are connected to each other by fixing flanges 93b, 97a formed on each of the housing body 91 and the first spacer 96 with bolts 99b. The flange 91a of the housing body 91 may be located, for example, on the outer side of the vehicle body frame 4 in the width direction.

[0044] For example, a bracket 122 for fixing the rear plate body 120 to the rear axle 9 is attached to the rear plate body 120 according to this embodiment. The bracket 122 is provided on a bottom wall portion 121 of the rear plate body 120. The bracket 122 is, for example, an L-shaped fixing metal fitting, and has a flat first portion 122a along the XY plane and a flat second portion 122b along the XZ plane. A pair of bolt holes are formed in the first portion 122a spaced apart in the X direction, and a bolt 122a1 is attached to the bolt hole.

[0045] In one example, the bottom wall portion 121 of the rear plate-like body 120 has an attachment portion 123 for attaching the bracket 122. The attachment portion 123 has a pair of long holes 123a, 123b that penetrate the bottom wall portion 121 in the up-down direction. The pair of long holes 123a, 123b are spaced apart in the X direction. In the Y direction, the pair of long holes 123a, 123b are formed at the same position. The pair of long holes 123a, 123b each extend in the X-axis direction as the longitudinal direction, and have a width (width in the Y direction) narrower than the bolt head of the bolt 122a1. The distance between the front ends of the pair of long holes 123a, 123b and the distance between the rear ends of the pair of long holes 123a, 123b may be the same as the distance between the pair of bolt holes formed in the first portion 122a of the bracket 122. In this embodiment, a pair of bolts 122a1 are inserted from the underside into a pair of long holes 123a, 123b, and then inserted into a pair of bolt holes in the first portion 122a. The first portion 122a is fixed to the bottom wall portion 121 by fastening nuts to the bolts 122a1. The bracket 122 is positioned on the rear plate body 120 by fastening the first portion 122a to the bottom wall portion 121.

[0046] In one example, a pair of brackets 122 are attached to the bottom wall portion 121 of the rear plate-like body 120, spaced apart in the Y direction. That is, the bottom wall portion 121 has mounting portions 123 (a pair of elongated holes 123a, 123b) formed at two locations spaced apart in the Y direction. In the illustrated example, the pair of brackets 122 are attached to both ends of the rear plate-like body 120 in the Y direction. When the pair of brackets 122 are attached to the rear plate-like body 120, the distance between the second portions 122b of the pair of brackets 122 is equal to the distance between the flanges of the pair of spacers 95 of the rear axle 9.

[0047] The second portion 122b has a pair of bolt holes 122b1 formed spaced apart in the X-axis direction. The second portion 122b of the bracket 122 is fixed to the rear axle 9 by a bolt. In one example, the second portion 122b of the bracket 122 may be fixed to a flange formed on a spacer 95 of the rear axle 9 by a bolt. In the illustrated example, the second portion 122b of the bracket 122 is fixed to a flange 96b of the first spacer 96 by a bolt 99b that connects the first spacer 96 and the second spacer 97 to each other.

[0048] The intermediate sheet body 130 is a rectangular sheet-like member that is connected to the front plate body 110 and the rear plate body 120 and covers the bottom surface of the traveling body 2 from below. The intermediate sheet body 130 may be provided in the same range as the front plate body 110 and the rear plate body 120 in the left-right direction. The intermediate sheet body 130 in the illustrated example is composed of a first sheet 130A arranged on the right side and a second sheet 130B arranged on the left side. The first sheet 130A and the second sheet 130B are connected to each other by a connecting member 133. In one example, the connecting member 133 may be composed of a plate provided with a pair of through holes, and a bolt and a nut that are inserted through the through holes and fixed to the first sheet 130A and the second sheet 130B, respectively. The intermediate sheet body 130 may be formed from a single sheet body having the same width as the front plate body 110 and the rear plate body 120, or may be formed from three or more sheet bodies adjacent to each other.

[0049] The intermediate sheet body 130 is formed of a soft material having a lower hardness than the hard material constituting the front plate body 110 and the rear plate body 120. The intermediate sheet body 130 may be formed of a material having flexibility to such an extent that it can be easily folded, for example, ethylene vinyl acetate (EVA), ethylene propylene diene rubber (EPDM), etc. The density of the material of the intermediate sheet body 130 may be smaller than the density of the material of the front plate body 110 and the rear plate body 120, and the mass per unit area of ​​the intermediate sheet body 130 as an example may be smaller than that of the front plate body 110 and the rear plate body 120. The intermediate sheet body 130 is formed with a through hole 130b for accessing the bottom of the traveling body 2. The through hole 130b as an example is provided in each of the first sheet 130A and the second sheet 130B. The through hole 130b may be provided with a grommet.

[0050] In this embodiment, the edge of the front end of the intermediate sheet body 130 is attached to the front plate body 110 by a front fixing plate 131. Similarly, the edge of the rear end of the intermediate sheet body 130 is attached to the rear plate body 120 by a rear fixing plate 132. For example, a plurality of through holes 130e for inserting bolts 136 are formed in the front end of the intermediate sheet body 130. The plurality of through holes 130e are arranged in the left-right direction at a predetermined interval. In the illustrated example, four through holes 130e are formed in each of the first sheet 130A and the second sheet 130B. Similarly, a plurality of through holes 130f for inserting bolts are formed in the rear end of the intermediate sheet body 130.

[0051] The rear end of the bottom wall portion 111 of the front plate-like body 110 and the front end of the bottom wall portion 121 of the rear plate-like body 120 are respectively formed with bolt holes 110e, 120f corresponding to the multiple through holes 130e, 130f of the intermediate sheet body 130. The front fixing plate 131 and the rear fixing plate 132 are plate-like bodies whose longitudinal direction is the left-right direction, and for example, their length in the left-right direction is the same as that of the front plate-like body 110. The front fixing plate 131 and the rear fixing plate 132 have bolt holes 131e, 132f corresponding to the bolt hole 110e of the front plate-like body 110 and the bolt hole 120f of the rear plate-like body 120, respectively.

[0052] In one example, bolts are inserted through the bolt holes 110e in the bottom wall portion 111 of the front plate-like body 110, the through holes 130e in the front end of the intermediate sheet body 130, and the bolt holes 131e in the front fixing plate 131, and fastened with nuts, so that the front end of the intermediate sheet body 130 is sandwiched between the bottom wall portion 111 and the front fixing plate 131, and the intermediate sheet body 130 is attached to the front plate-like portion. Similarly, bolts are inserted through the bolt holes 120f in the rear plate-like body 120, the through holes 130f in the rear end of the intermediate sheet body 130, and the bolt holes 132f in the rear fixing plate 132, and fastened with nuts, so that the rear end of the intermediate sheet body 130 is sandwiched between the rear plate-like portion and the rear fixing plate 132, and the intermediate sheet body 130 is attached to the rear plate-like portion.

[0053] In the illustrated example, two sets of bolt holes 110e and bolt holes 120f are formed at positions spaced apart in the X direction on the front plate body 110 and the rear plate body 120. For example, in the example of Fig. 8, the bolt holes 110e located on the rear side and the bolt holes 120f located on the front side are used to secure the intermediate sheet body 130, and the bolt holes 110e located on the front side and the bolt holes 120f located on the rear side are not used. By using the bolt holes appropriately, the length of the intermediate sheet body 130 can be adjusted.

[0054] The under-guard has an adjustment mechanism M that adjusts the position of the rear plate-like body 120 in the fore-and-aft direction of the traveling body 2. Fig. 10 is a side view illustrating the adjustment mechanism that adjusts the relative position of the rear axle and the under-guard. One example of the adjustment mechanism M is composed of the above-mentioned bracket 122 and an adjustment member 124 that adjusts the mounting position of the bracket 122 relative to the rear plate-like body 120. In this embodiment, the mounting position of the bracket 122 relative to the rear plate-like body 120 is adjusted by adjusting the X-direction position of the bolt 122a1 inserted through the long holes 123a, 123b of the rear plate-like body 120.

[0055] The adjustment member 124 includes, for example, an L-shaped metal fitting 124a. The metal fitting 124a includes a fixed portion 124a1 extending along the XY plane and a protruding portion 124a2 extending along the YZ plane. In this example, an opening 121d is formed in the bottom wall portion 121 of the rear plate-like body 120 to allow the protruding portion 124a2 to pass through. With the protruding portion 124a2 inserted into the opening 121d from the lower surface side of the bottom wall portion 121, the fixed portion 124a1 is fixed to the bottom wall portion 121 by a bolt. In this way, the adjustment member 124 is fixed to the bottom wall portion 121. The position of the opening 121d in the Y-axis direction coincides with the position of the second portion 122b of the bracket 122 fixed to the bottom wall portion 121.

[0056] A through hole 124c is formed in the protruding portion 124a2 of the adjustment member 124, and a fixed nut 124d is welded to communicate with the through hole 124c. A bolt 124e (a restricting member) is screwed into the fixed nut 124d so that the bolt head faces away from the bracket 122. A movable nut 124f, the position of which can be adjusted, is screwed between the bolt head of the bolt 124e and the fixed nut 124d. When the bolt 124e is tightened toward the fixed nut 124d, the front end position of the bolt 124e in the X direction is restricted by the movable nut 124f abutting against the fixed nut 124d. That is, by adjusting the position of the movable nut 124f, the position of the bolt 124e (the length of the bolt protruding in the X direction from the adjustment member 124) can be adjusted.

[0057] The adjustment mechanism M adjusts the position of the rear plate body 120 in the X direction by adjusting the position of the bolt 124e. For example, the user adjusts the position of the bolt 124e by moving the movable nut 124f while loosening the bolt 122a1 that fixes the bracket 122 to the rear plate body 120. Then, with the bracket 122 in contact with the bolt 124e, the user tightens the bolt 122a1 again to fix the bracket 122 to the rear plate body 120. When the amount of protrusion of the bolt 124e from the adjustment member 124 is large, the bracket 122 moves to the front side of the long holes 123a, 123b, and the rear plate body 120 moves to the rear side relative to the rear axle 9. When the amount of protrusion of the bolt 124e from the adjustment member 124 is small, the bracket 122 moves behind the long holes 123a, 123b, and the rear plate body 120 moves to the front side relative to the rear axle 9.

[0058] As described above, the boom sprayer 1, which is an example of a riding management machine according to this embodiment, includes the traveling body 2 and the underguard 100 that protects the underside of the traveling body 2. The traveling body 2 includes the vehicle body frame 4, the front axle 8 provided on the vehicle body frame 4, and the rear axle 9 provided on the vehicle body frame 4 at a rear position spaced from the front axle 8 in the front-rear direction. The underguard 100 includes a plate-shaped front plate-like body 110 that is fixed to the traveling body 2 and covers the front axle 8 from below, a plate-shaped rear plate-like body 120 that is fixed to the traveling body 2 at a position spaced from the front plate-like body 110 in the front-rear direction and covers the rear axle 9 from below, and a sheet-shaped intermediate sheet body 130 that is connected to the front plate-like body 110 and the rear plate-like body 120 and covers the traveling body 2 from below.

[0059] The underguard 100 provided on the boom sprayer 1 protects the traveling machine body 2 from below over a wide range including the front axle 8 and the rear axle 9 in the longitudinal direction of the vehicle. The intermediate sheet body 130 disposed in the middle in the longitudinal direction is formed in a sheet shape, and is therefore easy to handle. Therefore, the installation work of the underguard 100 can be easily performed. In addition, the front plate body 110 and the rear plate body 120 that protect the front axle 8 and the rear axle 9, respectively, are formed in a plate shape from sheet metal, which is a hard material, and therefore the axles, which are important parts of the traveling machine body 2, can be appropriately protected. Furthermore, the intermediate sheet body 130 is lighter than the front plate body 110 and the rear plate body 120, and therefore the boom sprayer 1 can be made lighter than when the entire underguard is made from sheet metal.

[0060] The front axle 8 in one example is provided so as to be able to swing with respect to the vehicle body frame 4, and the front plate-like body 110 may be fixed to the front axle 8. In a configuration in which the axle swings, the height positions of both ends of the axle change with the swing. Therefore, when a plate-like body is disposed below the axle, it is necessary to keep a long distance from the axle to avoid interference with the axle. In the configuration of the present disclosure, the front plate-like body 110 swings together with the front axle 8, so that interference between the front axle 8 and the front plate-like body 110 is suppressed. Therefore, the front plate-like body 110 can be brought closer to the front axle 8 in the height direction, and the distance from the ground to the underguard 100 can be increased.

[0061] In this embodiment, the intermediate sheet body 130 connected to the front plate-like body 110 has flexibility (rubber elasticity), so that the front plate-like body 110 can easily swing together with the front axle 8. The flexible intermediate sheet body 130 further has weather resistance, ozone resistance, chemical resistance, etc., so that deterioration due to the spraying of chemical solutions outdoors is suppressed.

[0062] As an example, the rear plate-like body 120 may be fixed to the rear axle 9. In this configuration, the rear plate-like body 120 can be easily disposed below the rear axle 9.

[0063] The boom sprayer 1, as an example, may have an adjustment mechanism M that adjusts the fore-and-aft position of the rear plate body 120 relative to the rear axle 9. In this configuration, by adjusting the position of the rear plate body 120 relative to the rear axle 9, the distance between the front plate body 110 and the rear plate body 120 can be adjusted, and slack in the intermediate sheet body 130, which is formed in a sheet shape, can be eliminated.

[0064] The adjustment mechanism M may have a bracket 122 that is attached to the rear plate body 120 and fixes the rear plate body 120 to the rear axle 9, and an adjustment member 124 that adjusts the attachment position of the bracket 122 relative to the rear plate body 120. In this configuration, the position of the rear plate body 120 relative to the rear axle 9 can be adjusted by adjusting the position of the bracket 122.

[0065] The rear plate body 120 in one example has long holes 123a, 123b that penetrate in the up-down direction and extend in the front-rear direction, and is fixed to the rear axle 9 by a bracket 122 that is positioned on the rear plate body 120 by bolts 122a1 inserted through the long holes 123a, 123b. The adjustment mechanism M has a bolt 124e (regulating member) that regulates the mounting position of the bracket 122 relative to the rear plate body 120. With this configuration, the position of the rear plate body 120 relative to the rear axle 9 can be easily adjusted.

[0066] As an example, a slit 120a penetrating in the vertical direction may be formed in the rear plate body 120. With this configuration, accumulation of water on the upper surface of the rear plate body 120 can be suppressed.

[0067] The traveling body 2 in one example has a tie rod 8b that swings together with the front axle 8 at a position spaced from the front axle 8 of the body frame 4 in the front-rear direction, and the front plate-like body 110 may cover the tie rod 8b from below. With this configuration, not only the front axle 8 but also the tie rod 8b can be appropriately protected.

[0068] Although the present disclosure has been specifically described based on the embodiments thereof, the present disclosure is not limited to the above-described embodiments.

[0069] For example, although the brackets (112, 118, 122) are fixed to the flanges (85, 95) provided on the axles (8, 9) in the above-described examples, the present invention is not limited to this example. For example, the axles may have dedicated fixing portions for mounting the brackets.

[0070] Also, while an example has been shown in which the rear plate body 120 is fixed to the rear axle 9, the rear plate body 120 may be fixed to any part of the traveling body 2. For example, the rear plate body 120 may be fixed to the vehicle body frame 4.

[0071] In addition, in the above embodiment, a self-propelled boom sprayer for pest control was given as an example of a ride-on management machine, but the same idea as the underguard disclosed herein may also be applied to a self-propelled ride-on management machine that performs weeding, fertilization, trenching, etc.

[0072] Also, although an example has been shown in which the front plate body 110 and the rear plate body 120 are made of a metal material, the front plate body 110 and the rear plate body 120 may be made of a resin material having hardness (strength) sufficient to protect the axle. As an example, the front plate body 110 and the rear plate body 120 may be made of medium density polyethylene, fiber reinforced plastic, or the like.

[0073] An embodiment of the present disclosure can be shown as follows. [1] a traveling body (2) including a body frame (4), a first axle (8) provided on the body frame (4), and a second axle (9) provided on the body frame (4) at a position spaced apart from the first axle (8) in the front-rear direction of the body frame (4); a plate-shaped first member (110) fixed to the traveling body (2) and covering the first axle (8) from below; a plate-shaped second member (120) fixed to the traveling body (2) at a position spaced from the first member (110) in the front-rear direction and covering the second axle (9) from below; The riding management machine comprises a sheet-like third member (130) connected to the first member (110) and the second member (120) and covering the traveling body (2) from below. [2] The first axle (8) is provided to be swingable relative to the body frame (4), The riding management machine according to [1], wherein the first member (110) is fixed to the first axle (8). [3] The riding management machine described in [1] or [2], wherein the second member (120) is fixed to the second axle (9). [4] The riding management machine described in [3], further comprising an adjustment mechanism (M) for adjusting the position of the second member (120) in the fore-and-aft direction of the traveling body (2). [5] The adjustment mechanism (M) is a bracket (122) attached to the second member (120) and fixing the second member (120) to the second axle (9); and an adjustment member (124) for adjusting the mounting position of the bracket (122) relative to the second member (120). [6] the second member (120) has elongated holes (123a, 123b) penetrating in the up-down direction and extending in the front-rear direction, and is fixed to the second axle (9) by the bracket (122) positioned on the second member (120) by fastening members inserted into the elongated holes (123a, 123b); The adjustment mechanism (M) has a regulating member that regulates the mounting position of the bracket (122) relative to the second member (120). [7] The riding management machine according to any one of [1] to [6], wherein a slit (120a) penetrating in the vertical direction is formed in the second member (120). [8] The traveling body (2) has a tie rod (8b) that swings together with the first axle (8) of the vehicle body frame (4) at a position spaced from the first axle (8) in the front-rear direction, The riding management machine according to any one of [1] to [7], wherein the first member (110) covers the tie rod (8b) from below. [Explanation of symbols]

[0074] 1...Boom sprayer (ride-on cultivation machine), 4...Vehicle frame, 8...Front axle (first axle), 9...Rear axle (second axle), 100...Underguard, 110...Front plate body (first member), 120...Rear plate body (second member), 130...Intermediate sheet body (third member).

Claims

1. a traveling body (2) including a body frame (4), a first axle (8) provided on the body frame (4), and a second axle (9) provided on the body frame (4) at a position spaced apart from the first axle (8) in the front-rear direction of the body frame (4); A plate-shaped first member (110) fixed to the traveling body (2) and covering the first axle (8) from below; A plate-shaped second member (120) that is fixed to the traveling body (2) at a position spaced from the first member (110) in the front-rear direction and covers the second axle (9) from below; A riding management machine comprising: a sheet-like third member (130) connected to the first member (110) and the second member (120) and covering the traveling body (2) from below.

2. The first axle (8) is provided to be swingable relative to the vehicle body frame (4), The riding management machine according to claim 1 , wherein the first member (110) is fixed to the first axle (8).

3. The riding management machine according to claim 2 , wherein the second member (120) is fixed to the second axle (9).

4. The riding management machine according to claim 3, further comprising an adjustment mechanism (M) for adjusting the position of the second member (120) in the fore-and-aft direction of the traveling body (2).

5. The adjustment mechanism (M) a bracket (122) attached to the second member (120) to secure the second member (120) to the second axle (9); The riding management machine according to claim 4, further comprising an adjustment member (124) for adjusting an attachment position of the bracket (122) relative to the second member (120).

6. The second member (120) has long holes (123a, 123b) penetrating in the up-down direction and extending in the front-rear direction, and is fixed to the second axle (9) by the bracket (122) positioned on the second member (120) by fastening members inserted into the long holes (123a, 123b); The riding management machine according to claim 5, wherein the adjustment mechanism (M) has a regulating member that regulates an attachment position of the bracket (122) relative to the second member (120).

7. 2. The riding management machine according to claim 1, wherein the second member (120) is formed with a slit (120a) penetrating therethrough in the vertical direction.

8. The traveling body (2) has a tie rod (8b) that swings together with the first axle (8) of the vehicle body frame (4) at a position spaced from the first axle (8) in the front-rear direction, The riding management machine according to claim 1 , wherein the first member (110) covers the tie rod (8b) from below.

9. An underguard attached to a traveling body (2) including a vehicle body frame (4), a first axle (8) provided at a front portion of the vehicle body frame (4), and a second axle (9) provided at a position spaced apart from the first axle (8) in a fore-and-aft direction on the vehicle body frame (4), A plate-shaped first member (110) fixed to the traveling body (2) and covering the first axle (8) from below; A plate-shaped second member (120) that is fixed to the traveling body (2) at a position spaced from the first member (110) in the front-rear direction and covers the second axle (9) from below; The underguard comprises a sheet-like third member (130) connected to the first member (110) and the second member (120) and covering the traveling body (2) from below.

Images