CN115836611A - Traveling vehicle - Google Patents

Abstract

The invention provides a traveling vehicle capable of suppressing an excessive load from being applied to a muffler or an exhaust gas purification device of exhaust gas introduced into an engine and a support member thereof. The traveling vehicle is characterized by comprising: an engine (7) provided at the front of the machine body; and a muffler (43) or an exhaust gas purification device that is introduced into the exhaust gas of the engine (7), wherein the muffler (43) or the exhaust gas purification device is supported by a support member that is coupled to an engine base.

Description

Traveling vehicle

Technical Field

The present invention relates to a traveling vehicle including an engine in a front portion of a machine body.

Background

Conventionally, there is known a rice transplanter including an engine as a power source and a muffler for reducing exhaust sound of the engine.

For example, patent document 1 discloses a rice transplanter including an engine at a front portion of a machine body, a muffler provided below a driver's seat, and an exhaust gas from the engine introduced into the muffler through an exhaust pipe extending substantially rearward from the engine.

Patent document 1: japanese patent laid-open No. 2004-357515

However, when the distance between the engine and the muffler is relatively long as in the rice transplanter disclosed in patent document 1, vibration transmitted from other vibration sources such as the fertilizer applicator and the seedling planting unit interferes with vibration generated by the engine, and the vibration becomes large, and an excessive load may be applied to the muffler or its support member.

In addition, when an exhaust gas purification device such as a DPF (Diesel Particulate Filter) is installed in the rice transplanter, there is a possibility that vibration transmitted from another vibration source such as a fertilizer application device interferes with vibration generated by the engine, and an excessive load is applied to the exhaust gas purification device or a support member thereof.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a traveling vehicle capable of suppressing an excessive load from being applied to a muffler or an exhaust gas purification device of exhaust gas introduced into an engine and a support member thereof.

The object of the present invention is achieved by a traveling vehicle including: an engine 7 provided at the front of the machine body; and a muffler 43 or an exhaust gas purification device that is introduced into the exhaust gas of the engine 7, wherein the muffler 43 or the exhaust gas purification device is supported by a support member that is coupled to an engine base.

According to the present invention, the engine 7 can be vibrated in the same manner as the muffler 43 or the exhaust gas purification apparatus, and it is possible to suppress excessive load from being applied to the muffler 43 or the exhaust gas purification apparatus, and the support member thereof due to interference between vibration transmitted from another vibration source and vibration generated by the engine 7.

In a further preferred embodiment of the present invention, a first pipe 21a extending from the engine 7 to the muffler 43 or the exhaust gas purification device is connected to a second pipe 21b located outside the first pipe 21a in the machine width direction, the second pipe 21b is connected to the muffler 43 or the exhaust gas purification device, and the second pipe 21b is shorter than the first pipe 21 a.

According to the preferred embodiment of the present invention, the pipe extending from the engine 7 to the muffler 43 or the exhaust gas purification device is connected by the first pipe 21a and the second pipe 21b disposed on the outer side in the width direction of the machine body, and therefore, when the muffler 43 or the exhaust gas purification device is attached to or detached from the machine body, the pipe can be divided into the first pipe 21a and the second pipe 21b, and therefore, the pipe does not need to be attached or detached while passing the entire pipe between the engine 7 and the frame of the machine body, and the work can be easily performed.

Further, according to the preferred embodiment of the present invention, the operator can easily extend his/her hands from the outside of the machine body to divide or connect the pipes, and when the pipes are divided into the first pipe 21a and the second pipe 21b, the length of the second pipe 21b connected to the muffler 43 or the exhaust gas purification device is short, so that the muffler 43 or the exhaust gas purification device can be easily attached to or detached from the machine body in a state where the second pipe 21b is attached to the muffler 43 or the exhaust gas purification device.

In a further preferred embodiment of the present invention, a heat shield plate 28 for thermally isolating the muffler 43 or the exhaust gas purification apparatus is provided at a position outside in the body width direction from a hood 47 covering the engine 7, below a bottom step plate 60, and inside in the body width direction from the muffler 43 or the exhaust gas purification apparatus.

According to this preferred embodiment of the present invention, since the heat insulating plate 28 is provided at a position on the outer side in the body width direction than the hood 47 covering the engine 7 and on the inner side in the body width direction of the muffler 43 or the exhaust gas purification apparatus, it is possible to prevent heat of the muffler 43 or the exhaust gas purification apparatus from invading the inside of the hood 47 and increasing the temperature in the vicinity of the engine 7. In addition, since the muffler 43 and the exhaust gas purifying device are disposed on the left and right sides of the engine 7 (in terms of the width of the engine body), the distance from the engine 7 is inevitably short, and therefore, the influence of other vibration sources of the engine body can be suppressed to a low level.

In a further preferred embodiment of the present invention, an air cleaner 73 and a suction hose 80 for introducing air into the air cleaner 73 are disposed in the engine room 54 covered with the hood 47, and the opening 75 is not formed in a portion overlapping the suction port 81 of the suction hose 80 when viewed from the side.

According to the preferred embodiment of the present invention, the opening 75 is not formed at the portion overlapping the suction port 81 of the suction hose 80 when viewed from the side, and when washing water is injected from the right side of the hood when washing the machine body, it is possible to suppress the washing water from entering the suction hose 80 of the air cleaner 73.

In a further preferred embodiment of the present invention, the traveling vehicle is provided with a radiator 71 and a fan 72 that release heat of the engine 7, and the radiator 71 and the fan 72 are partially not overlapped with each other when viewed from the side, and the suction port 81 is disposed at a position close to a part of the fan 72.

According to the preferred embodiment of the present invention, since the radiator 71 and the fan 72 are not partially overlapped with each other in a side view, the flow of the outside air passing through the part of the radiator 71 and heading to the vicinity of the part of the fan 72 can be formed, and since the suction port 81 of the suction hose 80 is disposed at a position close to the part of the fan 72, the part of the outside air introduced into the engine room 54 can be supplied to the suction port 81 of the suction hose 80 and the part of the fan 72 without being heated by the fin portion of the radiator 71.

In a further preferred embodiment of the present invention, an upper portion of the fan 72 is configured to be located above an upper surface of the heat sink 71.

Further, according to the preferred embodiment of the present invention, a part of the outside air introduced into the engine room 54 through the opening 75 can be supplied to the suction port 81 of the suction hose 80 by the fan 72 located above the upper surface of the radiator 71.

Effects of the invention

According to the present invention, it is possible to provide a traveling vehicle capable of suppressing an excessive load from being applied to the muffler 43 or the exhaust gas purification device, or the support member thereof, which is introduced into the exhaust gas of the engine 7.

Drawings

Fig. 1 is a schematic left side view of a rice transplanter in a preferred embodiment of the present invention.

FIG. 2 is a block diagram of a control system, a detection system, an input system, and a drive system of the rice transplanter shown in FIG. 1.

Fig. 3 (a) is a partially enlarged plan view of the vicinity of the hood, fig. 3 (b) is a partially enlarged left side view of the vicinity of the hood, fig. 3 (c) is a substantially plan view showing the muffler or the like detached from the body, and fig. 3 (d) is a substantially left side view showing the muffler or the like detached from the body.

Fig. 4 is a partially enlarged front view of the vicinity of the housing of the rice transplanter shown in fig. 1.

Fig. 5 is a schematic perspective view showing the vicinity of a heat shield plate provided laterally to a silencer of the rice transplanter shown in fig. 1.

Fig. 6 is a schematic diagram showing the arrangement of the components in the engine compartment.

Fig. 7 is a schematic perspective view of the vicinity of the radiator as viewed from the upper right front.

Fig. 8 is a schematic diagram showing a positional relationship between the radiator, the cooling fan, the right opening of the hood, and the suction port of the suction hose that introduces air into the air cleaner.

Fig. 9 (a) is a schematic plan view showing the front part of the rice transplanter, and fig. 9 (b) is a partially enlarged plan view of the vicinity of the hydrostatic continuously variable transmission shown in fig. 9 (a).

FIG. 10 is a left side view showing the front part of the rice transplanter.

Fig. 11 is an enlarged view showing 2 fans shown in fig. 9 (b).

Fig. 12 is a left side view of the rice transplanter in the embodiment of the present invention.

Fig. 13 (a) is a partial plan view of the vicinity of the seedling planting device of the rice planting machine according to the embodiment of the present invention, (b) is a partial rear view of the vicinity of the support frame of the rice planting machine according to the embodiment of the present invention, and (c) is a partial plan view of the vicinity of the support frame of the rice planting machine according to the embodiment of the present invention.

Fig. 14 is a partial left side view of the vicinity of the seedling planting device of the rice transplanter in accordance with the embodiment of the present invention.

Fig. 15 is a partial plan view of a part near a reinforcement member of the rice transplanter in accordance with the embodiment of the present invention.

Fig. 16 is a partial left side view of the vicinity of the soil preparation rotating body drive shaft suspension of the rice transplanter in the embodiment of the present invention.

Fig. 17 is a partial plan view of the vicinity of the support frame fixture and the soil preparation rotating body drive shaft fixture of the rice transplanter in accordance with the embodiment of the present invention.

Fig. 18 is a partial plan view of the vicinity of the driving shaft of the seedling planting part of the rice transplanter in accordance with the embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic left side view of a rice transplanter 1 of a preferred embodiment of the present invention.

In the present specification, as shown by the arrows in fig. 1, one side in the traveling direction of the rice transplanter 1 is referred to as the front side, and unless otherwise specified, the left side in the traveling direction of the rice transplanter 1 is referred to as the "left side", and the opposite side is referred to as the "right side".

The rice transplanter 1 of the present embodiment includes: a running vehicle 2; a seedling planting section 69 mounted on the rear part of the traveling vehicle 2; a fertilizer applicator 26 for supplying fertilizer to a field; and a control unit 87 (see fig. 2). Hereinafter, the rice transplanter 1 is also simply referred to as "machine body".

The traveling vehicle 2 includes: a main frame 3 having a pair of left and right front wheels 8 and a pair of left and right rear wheels 9 as running wheels; a bottom pedal 60 disposed above the main frame 3; a driver seat 48 provided above the bottom pedal 60; an operation unit 49; a hood 47 provided at the front of the body; an engine 7 covered with a hood 47; and a transmission mechanism such as a transmission case 30 for transmitting the power of the engine 7 to the pair of left and right front wheels 8, rear wheels 9, seedling planting parts 69, and the like.

The main frame 3 is a frame constituting the machine body, and includes, in addition to a pair of left and right front wheels 8 and a pair of rear wheels 9: a frame 32 extending in the machine width direction (left-right direction) at the front of the machine; a frame 33 extending in the machine body width direction at the rear of the frame 32; and 2 frames 37 and 38 (see fig. 3) extending in the front-rear direction. The frame 32 and the frame 33 extending in the body width direction are attached to 2 frames 37, 38 extending in the front-rear direction, respectively.

The floor panel 60 constitutes a floor surface of the machine body, and an operator can perform various operations while standing or walking on the floor panel 60.

The operation unit 49 includes: a forward/reverse lever 35 that changes the forward/reverse direction and the vehicle speed of the traveling vehicle 2; and a steering device 56 that steers the pair of left and right front wheels 8.

On the other hand, the driving force output from the engine 7 is transmitted to the transmission case 30 via the belt power transmission mechanism 4 (see fig. 10) and the hydrostatic continuously variable transmission (HST) 25.

The hydrostatic continuously variable transmission 25 includes a trunnion (not shown), and when the forward/reverse lever 35 is operated, the opening degree of the trunnion is adjusted by driving the HST servomotor 12 (see fig. 2), and the output to the transmission case 30 is changed.

The power transmitted to the transmission case 30 is changed in speed inside thereof, and is divided into power for traveling toward the pair of left and right front wheels 8 and the pair of left and right rear wheels 9 and power for driving the seedling planting part 69 (power for driving) and transmitted.

The power for traveling is transmitted to the pair of left and right front wheels 8 via the front wheel end box 13 and the front wheel axle 31, and is transmitted to the pair of left and right rear wheels 9 via the pair of left and right rear wheel transmission shafts 14, the pair of left and right rear wheel gear boxes 51, and the axle 82.

On the other hand, the driving power is transmitted to an insertion clutch (not shown) provided at the rear part of the traveling vehicle 2, and when the insertion clutch is engaged, the driving power is further transmitted to the seedling insertion part 69.

As shown in fig. 1, the seedling planting unit 69 is attached to the traveling vehicle 2 via the lifting link device 5, and is configured to be able to be lifted by the lifting link device 5.

As shown in fig. 1, the seedling planting unit 69 includes: a seedling stage 65 for vertically placing a mat-like seedling (hereinafter, referred to as a "seedling mat") with soil; and a seedling transplanting device 64 disposed rearward and below the seedling stage 65.

FIG. 2 is a block diagram of a control system, a detection system, an input system and a drive system of the rice transplanter 1 shown in FIG. 1.

As shown in fig. 2, the control system of the rice planting machine 1 includes a control unit 87 that controls the operation of the entire rice planting machine 1.

The control Unit 87 includes a Processing Unit 85 having a CPU (Central Processing Unit) and a storage Unit 86 having a RAM (Random Access Memory) and the like, and the storage Unit 86 stores various programs and data for controlling the rice transplanter 1.

As shown in fig. 2, the detection system of the rice transplanter 1 includes: a steering sensor 58 having an encoder (not shown) for detecting a steering angle (angle from a neutral position) of the manipulator 56; a torque sensor 45 that detects an input torque (a steering amount at this time) to the steering device 56; an engine rotation sensor 44 that detects the rotation speed of the engine 7; and a rear wheel rotation sensor 52 that detects the rotation speed of the rear wheel 9.

As shown in fig. 2, the input system of the rice transplanter 1 includes a forward/backward lever sensor 36, and the forward/backward lever sensor 36 detects the operation position of the forward/backward lever 35 that changes the forward/backward movement of the rice transplanter 1 and the vehicle speed.

As shown in fig. 2, the driving system of the rice transplanter 1 includes: a throttle motor 10 that adjusts the intake air amount of the engine 7 (see fig. 3 and 4) provided below the hood 47; an HST servomotor 12 that adjusts the opening degree of the trunnion in the hydrostatic continuously variable transmission 25 and changes the forward and backward movement of the transplanter 1 and the vehicle speed; a power steering device 11; an insertion clutch motor 27 for operating the insertion clutch; and a fan drive motor 29 that drives a cooling fan 72 that cools the heat sink 71.

Fig. 3 is a partially enlarged view of the vicinity of the hood 47 of the rice transplanter 1 shown in fig. 1, fig. 3 (a) is a partially enlarged plan view of the vicinity of the hood 47, fig. 3 (b) is a partially enlarged left side view of the vicinity of the hood 47, fig. 3 (c) is a substantially plan view showing the muffler 43 and the like detached from the machine body, and fig. 3 (d) is a substantially left side view showing the muffler 43 and the like detached from the machine body.

The muffler 43 and the like shown in fig. 3 (c) are shown in the same size and at the same position in the left-right direction as the muffler 43 and the like shown in fig. 3 (a), and the muffler 43 and the like shown in fig. 3 (d) are shown in the same size and at the same position in the front-rear direction as the muffler 43 and the like shown in fig. 3 (b). In other words, the muffler 43 shown in fig. 3 (c) and the like are obtained by directly moving only the muffler 43 shown in fig. 3 (a) forward, and the muffler 43 shown in fig. 3 (d) and the like are obtained by directly moving only the muffler shown in fig. 3 (b) upward.

Fig. 4 is a partially enlarged front view of the vicinity of the hood 47 of the rice planting machine 1 shown in fig. 1, and only a front view of the silencer and the like detached from the machine body is shown in the white frame of fig. 4.

Fig. 3 (a), 3 (b), and 4 show a mode in which the engine 7, the muffler 43, and the like disposed in the engine room 54 inside thereof can be visually recognized through the hood 47, the bottom step 60, and the like. In fig. 3 (b), the outline (substantially rectangular outline) of the muffler 43 is emphasized by a broken line in order to make the position of the muffler 43 easy to visually recognize.

The engine 7 is supported by the left front engine base 16, the left rear engine base 17, the right front engine base, and the right rear engine base (not shown), and is disposed in a leftward position in the engine room 54 (see fig. 3 a and 4). As shown in fig. 3 (d), the front left engine base 16 and the rear left engine base 17 are each hook-shaped in side view.

The left front engine base 16 is attached to a frame 32 extending in the machine body width direction via an insulator 18 for vibration prevention and a bracket 20, and the left rear engine base 17 is attached to a frame 33 extending in the machine body width direction via an insulator 18 for vibration prevention and a bracket 20 different from those attached to the left front engine base 16. That is, the 2 frames 32 and 33 support the front left engine base 16 or the rear left engine base 17 that supports the engine 7, respectively, in other words, the engine 7 is supported by the 2 frames 32 and 33 that are a part of the main frame 3. The right front engine base and the left rear engine base 17 are also attached to the 2 frames 32 and 33 via the spacers 18 and the brackets 20, respectively. In fig. 3 (c), the circular portions 19 of the left front engine base 16 and the left rear engine base 17 to which the spacers 18 are attached are indicated by broken lines.

The muffler 43 is disposed on the left side of the engine 7 and below the bottom step 60, as shown in fig. 3 (a) and 4, in order to reduce exhaust sound of the engine 7.

As shown in fig. 3 (c), 3 (d) and 4, the muffler 43 is supported by the front muffler bracket 39 and the rear muffler bracket 40 and is positioned between the 2 frames 32 and 33 supporting the engine 7. The front muffler bracket 39 is coupled to the left front engine base 16 by bolts and nuts, and the rear muffler bracket 40 is coupled to the left rear engine base 17 by bolts and nuts. The front muffler bracket 39 and the rear muffler bracket 40 are examples of the "support member" of the present invention.

The muffler 43 is disposed on the left of the engine 7, and the distance between the engine 7 and the muffler 43 is short. Therefore, it is possible to suppress the transmission of the wave of vibration generated by other parts of the rice transplanter 1 to the muffler 43 in a state where the wave of vibration is applied (interfered) to the engine 7, and therefore it is possible to suppress the application of excessive load to the front and rear muffler brackets 39, 40, the muffler 43, the pipe 21 extending from the engine 7, and the like.

The muffler 43 has a front-rear symmetrical outer shape, and the position of the front-rear direction center portion of the muffler 43 in the front-rear direction coincides with the rotation center 41 of the flywheel 23 of the engine 7. That is, the muffler 43 has an external shape that is symmetrical in the front-rear direction with respect to a vertical virtual plane Sv (see fig. 3 b) including the rotation center 41 of the flywheel 23 as a symmetrical plane (with respect to the vertical virtual plane Sv as a center). In other words, the outer shape of the muffler 43 is plane-symmetric with respect to a vertical virtual plane Sv (see fig. 3 b) including the rotation center 41 of the flywheel 23 as a symmetric plane. The vertical virtual plane Sv is a plane extending in the vertical direction and the horizontal direction.

Here, since the engine 7 swings back and forth about the rotation center 41 of the flywheel 23 (extending in the machine body width direction), the muffler 43 is configured to be symmetrical back and forth about a vertical virtual plane Sv (see fig. 3 (b)) including the rotation center 41 of the flywheel 23 as a plane of symmetry, so that loads applied to the front and rear muffler brackets 39 and 40, the muffler 43, and the like can be equally dispersed when the engine 7 vibrates, and the loads applied to these components can be reduced. Therefore, the muffler 43 can be supported by the muffler bracket with the minimum strength. In the present embodiment, the front and rear muffler brackets 39, 40 have a shape symmetrical with respect to each other in the front-rear direction, and are configured and arranged symmetrically in the front-rear direction with respect to a vertical virtual plane Sv (see fig. 3 b) including the rotation center 41 of the flywheel 23 as a symmetry plane (in other words, with respect to the vertical virtual plane Sv as a center), so that loads applied to the front and rear muffler brackets 39, 40, the muffler 43, and the like can be further equally distributed. In addition, the rotation axis of the flywheel 23 in the present embodiment extends in the machine body width direction.

In the present embodiment, as shown in fig. 3 (d), the front and rear muffler brackets 39 and 40 have portions bent in the shape of a letter "\\676767676767674, respectively, so that the front and rear muffler brackets 39 and 40 can be suppressed from being bent, the engine 7 and the muffler 43 can be vibrated in the same manner, and an excessive load can be prevented from being applied to the front and rear muffler brackets 39 and 40, the muffler 43, and the like.

On the other hand, as shown in fig. 4 and 3 (c), the pipe 21 extending from the engine 7 to the muffler 43 has a shape: extends forward and downward from a front upper portion (front surface) of the engine 7 in the engine compartment 54, extends horizontally leftward below the bottom step plate 60, and is connected to a front surface of the muffler 43. Reference numeral 70 denotes a portion of the pipe 21 connected to an exhaust manifold provided in the front upper portion of the engine 7.

The pipe 21 is configured by connecting a right pipe 21a and a left pipe 21b by a flange 24 located at a portion extending horizontally in the left-right direction, and the left pipe 21b is located on the outer side (left side) in the machine width direction of the right pipe 21 a. That is, the right pipe 21a is the "first pipe" of the present invention, and the left pipe 21b is the "second pipe" of the present invention. A flat bolt 15 (a bolt-like member having a flat head, see fig. 3 c and 4) is welded to the flange 24, a threaded portion thereof is inserted from the engine 7 side (the right side of the flange 24) toward the muffler 43 side (the left side of the flange 24) and is in a state of protruding to the left side of the flange 24, and a nut is screwed into the protruding threaded portion, thereby coupling the right pipe 21a and the left pipe 21 b. As shown in fig. 3 a and 4, the flange 24 is positioned further outward in the machine width direction (left-right direction) than the frame 37, and the frame 37 is positioned further outward in the machine width direction than the hood 47.

Thus, the following structure is obtained: since the pipe 21 can be divided at a portion close to the muffler 43 by removing the nut from the threaded portion of the flat bolt, the pipe 21 can be easily attached and detached without requiring the whole pipe 21 to be inserted between the engine 7 and each frame when attaching and detaching the muffler 43 to and from the machine body.

When the muffler 43, the pipe 21b, and the pair of front and rear muffler brackets 39 and 40 are attached (assembled) to the machine body and the pipe 21a thereof, the pair of front and rear muffler brackets 39 and 40 are fitted between the front left engine base 16 and the rear left engine base 17, and then nuts are screwed into the threaded portions of the flat bolts of the flange 24 from the left side, so that the muffler 43 can be easily held with one hand. After that, by fixing the respective parts from the front, rear, and left sides using bolts and nuts, the worker can mount the muffler 43 on the machine body by 1 person.

Further, as shown in fig. 4, the flange 24 is disposed on the outer side (left side) in the machine body width direction than the hood 47 and the frame 37, and the pair of front and rear muffler brackets 39, 40 are configured to be inclined downward to the right, and the coupling positions with the left front engine base 16 and the left rear engine base 17 are lowered, whereby the worker can easily put his or her hand on the flange 24 or the coupling portions between the left front engine base 16 and the left rear engine base 17 and the pair of muffler brackets 39, 40 from the outer side of the machine body or the lower side of the machine body, and the work of attaching and detaching the muffler 43 becomes easy.

As shown in fig. 4, the pipe 21 is coupled to and supported by the front left engine base 16 at a substantially central portion in the left-right direction of a portion extending in the horizontal direction, and the right pipe 21a is reliably supported at a total of 2 at a connection portion 70 connected to an exhaust manifold serving as an exhaust portion of the engine 7 and a coupling portion coupled to the front left engine base 16. Further, since the position of the right pipe 21a is determined by the exhaust manifold and the left front engine base 16 in this way, when the muffler 43, the pair of front and rear muffler brackets 39, 40, and the left pipe 21b are mounted on the machine body, the right pipe 21a is not mounted while being bent, and it is possible to prevent an excessive load from being applied to the entire pipe 21 and a portion connected to the engine 7, and to easily perform mounting.

Fig. 5 is a schematic perspective view showing the vicinity of a heat insulating plate provided on the side of the silencer 43 of the rice planting machine 1 shown in fig. 1. In fig. 5, the pipe 21 is omitted for convenience.

A heat insulating plate 28 for blocking heat of the muffler 43 is provided immediately on the right side of the muffler 43, that is, between the engine 7 and the muffler 43, and the engine room 54 and the space where the muffler 43 is disposed are partitioned by the heat insulating plate 28. Further, as shown in fig. 4, since the muffler 43 and the heat insulating plate 28 are disposed on the outer side in the machine body width direction than the hood 47, the heat insulating plate 28 prevents the heat of the muffler 43 from entering the engine room 54, and the temperature rise of the engine 7 and the engine room 54 can be effectively suppressed. Therefore, the cooling efficiency of the radiator 71 and the like provided on the right of the engine 7 can be improved. Further, since components such as a belt and a tensioner arm which are not intended to apply heat are disposed at the lower left of the engine 7, the durability of these components can be improved by blocking heat released from the muffler 43.

Glass wool is wound around the entire surface of the right pipe 21a of the pipe 21 having the divided structure, and heat can be prevented from leaking from the right pipe 21a, a part of which passes through the engine room 54, to the engine room 54 and the vicinity thereof. The connection portion between the pipe 21 and the muffler 43 is positioned on the left side of the heat shield plate 28.

In the present embodiment, the heat insulating plate 28 is attached to the left side surface of the frame 37 extending in the front-rear direction, and the space in the vicinity of the engine room 54 and the muffler 43 can be easily partitioned without a gap.

On the other hand, as shown in fig. 3 and 4, the exhaust port 42 of the muffler 43 is disposed in the central portion and the lower left portion in the front-rear direction of the muffler 43, and is configured to exhaust toward the lower left (the outer side in the machine body width direction and the lower right), so that the exhaust gas from the muffler 43 can be suppressed from reaching the vicinity of the engine 7. Further, as shown in fig. 3 and 4, the exhaust pipe 46 (the pipe forming the exhaust port 42) extending from the muffler 43 is formed short, so that the weight and cost can be suppressed low. The exhaust pipe 46 extending from the muffler 43 is disposed at the central portion in the front-rear direction of the muffler 43, and the muffler 43 and the exhaust pipe 46 thereof are configured to be symmetrical in the front-rear direction about a vertical virtual plane Sv (see fig. 3 (b)) passing through the rotation center 41 of the flywheel 23 of the engine 7. Therefore, the vibration of the muffler 43 caused by the vibration of the engine 7 is less likely to be affected, the engine 7 and the muffler 43 can be vibrated in the same manner, and excessive load can be prevented from being applied to the front and rear muffler brackets 39, 40, the muffler 43, and the like.

Fig. 6 is a schematic diagram showing the arrangement of the components in the engine room 54, fig. 6 (a) is a schematic plan view showing the arrangement of the components in the engine room 54, and fig. 6 (b) is a schematic cross-sectional diagram showing the arrangement of the components in the upper portion of the engine room 54 along the X-X line of fig. 6 (a).

As shown in fig. 4 and 6, a radiator 71 and a cooling fan 72 positioned on the left side of the radiator 71 are provided on the right side of the engine 7 disposed on the left side in the engine room 54, an air cleaner 73 is provided on the upper rear side of the engine 7, and a spare box 74 is provided on the upper rear left side of the engine 7. In fig. 6, a suction hose of the air cleaner 73, which will be described in detail later, is omitted for convenience.

As shown in fig. 6, openings 75 formed by a mesh grid are formed on the left and right side surfaces of the cover 47, and an opening 77 formed by a slit 76 (see fig. 3 (b) and 4) is formed on the front surface of the cover 47. When the cooling fan 72 is driven, the outside air is supplied into the engine room 54 from the right opening 75 and is discharged from the left opening 75 or the front opening 77.

Here, engine accessories such as the air cleaner 73, the reserve tank 74, and the radiator hose 78 are arranged in the left-right direction so as to form a wall at the rear upper portion in the engine compartment 54. By disposing the air cleaner 73, the reserve tank 74, the radiator hose 78, and the like in this manner, the outside air taken into the engine room 54 by the cooling fan 72 can smoothly pass leftward in the engine room 54 without being blocked by the air cleaner 73, the reserve tank 74, the radiator hose 78, and the like, and the vicinity of the radiator 71 and the engine 7 can be effectively cooled.

The heated air in the engine room 54 is blocked by an air cleaner 73, a reserve tank 74, a radiator hose 78, and the like, which are arranged in a left-right direction so as to form a wall at an upper rear portion in the engine room 54. Therefore, it is possible to prevent the leakage of the hot air rearward from the gap of a panel (not shown) of the operation system provided in the steering column 79 (see fig. 1), that is, in the vicinity of the operator (driver), and the operator does not feel the hot air and discomfort.

In addition, by forming the wall using the engine accessories such as the air cleaner 73, the reserve tank 74, and the radiator hose 78 in this way, it is not necessary to form the wall separately using an iron plate or the like, and the weight of the machine body can be reduced and the manufacturing cost can be suppressed.

Further, as shown in fig. 3 (b), since the opening 77 is formed in the hood 47 at the front of the engine 7, air heated by the pipe 21 extending downward in front of the engine 7 can be discharged from the left opening 75 and the front opening 77, and the temperature increase in the engine room 54 due to the pipe 21 can be effectively suppressed.

In the present embodiment, the hood 47 is configured to be substantially bilaterally symmetrical. In the present embodiment, the left and right openings 75 of the hood 47 are formed by a mesh grille, and the front opening 77 is formed by the slits 76, but the left and right openings 75 may be formed by slits or the like, and the front opening 77 may be formed by a mesh grille or the like.

On the other hand, fig. 7 is a schematic perspective view of the vicinity of the radiator 71 as viewed from the upper right front.

Fig. 8 is a schematic view showing a positional relationship among the radiator 71, the cooling fan 72, the right-side opening 75 of the hood 47, and the suction port 81 of the suction hose 80 for introducing air into the air cleaner 73, fig. 8 (a) is a schematic left-side view showing a positional relationship among the radiator 71, the cooling fan 72, the right-side opening 75 of the hood 47, and the suction port 81 of the suction hose 80 for introducing air into the air cleaner 73, and fig. 8 (b) is a schematic front view showing a positional relationship among the upper portion of the radiator 71, the cooling fan 72, the right-side opening 75 of the hood 47, and the suction port 81 of the suction hose 80 for introducing air into the air cleaner 73.

In fig. 7, the hood 47 itself is omitted to facilitate observation of the vicinity of the radiator 71, and only the right opening 75 of the hood 47 is illustrated.

In fig. 7 and 8 (b), the flow of the outside air is indicated by arrows.

In fig. 8 (a), the outline of the heat sink 71 located on the back side (right side) of the fan shroud 83 of the cooling fan 72 in the drawing is indicated by a one-dot chain line, and the outline of the right opening 75 is indicated by a broken line. In fig. 8 (b), the fan shroud 83 and the engine 7 are omitted for convenience.

As shown in fig. 7 and 8 (a), the fan shroud 83 of the cooling fan 72 extends largely in the front-rear direction, and particularly the front portion of the fan shroud 83 extends to the vicinity of the front inner side of the hood 47, and the space where the radiator 71 exists and the space where the engine 7 exists are separated by the fan shroud 83 to some extent. The upper portion of the fan shroud 83 extends slightly above the upper surface 84 of the radiator 71.

The suction port 81 of the suction hose 80 extending from the air cleaner 73 is connected to an opening (not shown) formed in the fan shroud 83, and the outside air taken in from the opening 75 formed in the right surface of the hood 47 can be supplied (introduced) into the air cleaner 73 through the opening formed in the fan shroud 83 and the suction hose 80. As shown in fig. 7 and 8 (a), the suction port 81 of the suction hose 80 is disposed immediately (slightly) behind the upper portion of the cooling fan 72. In other words, the suction port 81 is disposed at a position close to the upper portion of the cooling fan 72.

As shown in fig. 8 (a), the range of the heat sink 71 and the range of the right opening 75 are configured to substantially overlap each other in a side view.

In contrast, as shown in fig. 8 (a) and 8 (b), the upper portion of the cooling fan 72 and the suction port 81 of the suction hose 80 are located higher than the upper surface 84 of the radiator 71, respectively.

Therefore, the outside air taken in from the right opening 75 of the cover 47 passes through the fin portion (not shown) of the heat sink 71 by the rotational driving of the cooling fan 72, and a part (not passing through the fin portion) passes above the heat sink 71 as shown in fig. 7 and 8 b.

Part of the outside air passing above the radiator 71 is sucked by the cooling fan 72 together with the outside air passing through the fin portion and sent to the vicinity of the engine 7, while the other part of the outside air passing above the radiator 71 is sent from the suction port 81 disposed rearward of the upper portion of the cooling fan 72 into the air cleaner 73 through the suction hose 80.

That is, in the present embodiment, since the upper portion of the cooling fan 72 is located higher than the upper surface 84 of the radiator 71, a continuous air flow can be formed from the right opening 75 of the hood 47 to the upper side of the radiator 71, and outside air can be efficiently supplied to the intake port 81 disposed immediately behind the upper portion of the cooling fan 72.

Further, since the outside air that has passed over the radiator 71 without passing through the fin portion of the radiator 71 is sent from the intake port 81 into the air cleaner 73 through the intake hose 80, the outside air that has not been heated by the fin portion can be supplied to the inside of the engine 7.

Further, since the cooling fan 72 protruding upward from the radiator 71 can form an air flow from the opening 75 on the right side of the hood 47 toward the upper side of the radiator 71, the heated air in the vicinity of the engine 7 can be prevented from flowing rightward, that is, in the vicinity of the radiator 71 (backflow). Therefore, in the present embodiment, it is not necessary to greatly extend the fan shroud 83 extending in the front-rear direction of the radiator 71 upward to the upper inner surface of the hood 47, and the manufacturing cost can be suppressed. Further, in the engine room 54, since it is not necessary to separate the space where the radiator 71 exists and the space where the engine 7 exists without a gap, even when a component for fixing the radiator 71, the hood 47, the rectilinear antenna mount, or the like is separately provided and a gap is generated there, the cooling performance of the engine can be maintained.

On the other hand, in the present embodiment, as shown in fig. 8 a and 8 b, the upper end portion of the opening 75 formed in the right surface of the hood 47 is configured to have a height position substantially equal to that of the radiator 71, and the side surface portion of the hood 47, which is positioned on the upper side of the cooling fan 72 protruding upward from the radiator 71 in a side view and on the left of the suction port 81 of the suction hose 80 (the portion of the hood 47 positioned on the left of the upper portion of the cooling fan 72 and the portion of the hood 47 positioned on the left of the suction port 81), is not opened. That is, no opening is formed in the right side surface of the hood 47 and in the portion overlapping the upper portion of the cooling fan 72 protruding upward from the radiator 71 and the suction port 81 of the suction hose 80 when viewed from the side surface.

With this configuration, when washing water is injected from the right side of the cover 47 during washing of the machine body, the washing water can be prevented from entering the suction hose 80 of the air cleaner 73 or from splashing on the cooling fan 72. As described above, according to the present embodiment, the infiltration of water can be suppressed, and the outside air can be efficiently supplied to the vicinity of the engine 7.

Fig. 9 (a) is a schematic plan view showing the front part of the rice transplanter 1, and fig. 9 (b) is a partially enlarged plan view of the vicinity of the hydrostatic continuously variable transmission 25 shown in fig. 9 (a).

Further, fig. 10 is a left side view showing a front part of the rice transplanter 1.

On the other hand, fig. 11 is an enlarged view showing 2 fans shown in fig. 9 (b), fig. 11 (a) is a substantially left side view of the main fan, and fig. 11 (b) is a substantially left side view of the sub fan. Fig. 11 (c) is a substantially left side view showing a state in which 2 fans are installed with the same blade phase in side view, fig. 11 (d) is a substantially left side view showing a state in which 2 fans are installed with different blade phases in side view, and fig. 11 (e) is a schematic plan view of the vicinity of the 2 fans. In fig. 11 (e), the boss 55 described in detail later is hatched.

The power output from the engine 7 is transmitted to the input shaft 50, which is input to the hydrostatic continuously variable transmission 25, via the belt-type power transmission mechanism 4 including the belt 6 shown in fig. 10.

Specifically, the power output from the engine 7 is first transmitted to the transmission pulley 34 (see fig. 9 a and 10) attached to the flywheel 23 (see fig. 3 b). As a result, the closed loop transmission belt 6, which is wound around the transmission pulley 34 and the pulley 53 disposed on the left side of the hydrostatic continuously variable transmission 25, rotates.

Since the pulley 53 is attached to the input shaft 50 (see fig. 9 b and 11 e) input to the hydrostatic continuously variable transmission 25, when the transmission belt 6 rotates, power is transmitted to the input shaft 50 (see fig. 11 c) input to the hydrostatic continuously variable transmission 25 via the pulley 53.

A main fan 61 and a sub-fan 62 arranged in the left-right direction are attached to the input shaft 50, and as the input shaft 50 rotates by the power of the engine 7, 2 fans 61 and 62 rotate, and air is sent to the right (to the hydrostatic continuously variable transmission 25 side), so the hydrostatic continuously variable transmission 25 is cooled. The sub-fan 62 assists the main fan 61 in taking in air.

In the present embodiment, the main fan 61 has 6 blades 66, the sub-fan 62 has 6 blades 68, and the shapes of the blades 66 and 68 are different between the 2 fans 61 and 62. Specifically, the main fan 61 has a thickness (thickness in the left-right direction) of the blades 66 thereof, and the blades 68 of the sub-fan 62 disposed between the main fan 61 and the pulley 53 are thinner than the blades 66 of the main fan 61 in the direction (left-right direction) in which the input shaft 50 as the rotation shaft thereof extends. The blades 66 of the main fan 61 have a larger diameter than the blades 68 of the sub-fan 62 (see fig. 11 c).

Here, the main fan 61 and the pulley 53 are disposed with a sufficient distance therebetween in the left-right direction, and the sub fan 62 is formed of a thin iron plate with a small outer diameter, so that the space formed between the main fan 61 and the pulley 53 is not filled with the sub fan 62. Therefore, even in a narrow space below the floor panel 60, the main fan 61 can sufficiently take in air with the assistance of the air blowing by the sub-fan 62 and efficiently send out the air to the right.

The 2 fans 61 and 62 are respectively assembled to the front and rear surfaces of a flange portion of the boss portion 55, and the boss portion 55 is a component for attaching the pulley 53 to the hydrostatic continuously variable transmission 25. The 2 fans 61 and 62 can be assembled to the input shaft 50 independently of the pulley 53, and even when the pulley 53 is detached from the input shaft 50, the 2 fans 61 and 62 remain on the hydrostatic continuously variable transmission 25 side, which facilitates maintenance. When detaching the 2 fans 61 and 62 from the input shaft 50, the operator can detach the 2 fans 61 and 62 from the input shaft 50 at the same time by detaching the hub 55 from the hydrostatic continuously variable transmission 25.

In the present embodiment, since 2 fans 61 and 62 for blowing air to the hydrostatic continuously variable transmission 25 are provided as described above, the cooling effect can be improved.

On the other hand, the 2 fans 61 and 62 are assembled so as to be shifted by 90 °, and can be switched between a state in which they are attached to the input shaft 50 so that their phases (blade positions) are the same in a side view (see fig. 11 c) and a state in which they are attached to the input shaft 50 so that their phases (blade positions) are different in a side view (see fig. 11 d). Therefore, for example, when the components around the hydrostatic continuously variable transmission 25 are changed, the air blowing efficiency can be improved by changing the phases of the 2 fans 61 and 62.

According to the present embodiment, as shown in fig. 4, the pipe 21 extending from the engine 7 to the muffler 43 is coupled to the front left engine base 16 supporting the engine 7, and as shown in fig. 3 (d), the front muffler bracket 39 and the rear muffler bracket 40 as the support members supporting the muffler 43 are coupled to the front left engine base 16 or the rear left engine base 17, so that the engine 7 and the muffler 43 can be vibrated similarly. Further, the muffler 43 is disposed on the left side of the engine 7 (in terms of the width of the engine body), and the distance between the engine 7 and the muffler 43 is inevitably close, and the influence of other vibration sources of the engine body can be suppressed to a low level. Therefore, it is possible to suppress the waves of vibration transmitted from other vibration sources from interfering with the waves of vibration generated by the engine 7 and applying excessive load to the muffler 43 and the pair of front and rear muffler brackets 39 and 40.

Further, according to the present embodiment, as shown in fig. 4, since the muffler 43 is provided below the bottom pedal 60, the muffler 43 that generates heat can be kept away from the operator (driver).

Further, according to the present embodiment, as shown in fig. 3 (b), since the outer shape of the muffler 43 is symmetrical in the front-rear direction with respect to the vertical virtual plane Sv including the rotation center 41 of the flywheel 23 of the engine 7 as a symmetrical plane, the load applied to the pair of front and rear muffler brackets 39, 40 supporting the muffler 43 can be equally dispersed and the load can be reduced when the engine 7 vibrates, and therefore, the muffler 43 can be supported by the supporting member having lower strength than the conventional one.

Further, according to the present embodiment, as shown in fig. 3 (b), since the pair of front and rear muffler brackets 39 and 40 that support the muffler 43 are configured and arranged to be symmetrical with each other in the front-rear direction with respect to the vertical virtual plane Sv including the rotation center 41 of the flywheel 23 of the engine 7 as a symmetrical plane, it is possible to further evenly distribute the load applied to the pair of front and rear muffler brackets 39 and 40 and the muffler 43 when the engine 7 vibrates, and it is possible to reduce the load.

Furthermore, according to the present embodiment, as shown in fig. 3 (c) and 4, the pipe 21 extending from the engine 7 to the muffler 43 is configured by connecting the right pipe 21a as the first pipe and the left pipe 21b as the second pipe disposed outside in the machine body width direction thereof via the flange 24, and therefore, the muffler 43 can be divided into the right pipe 21a and the left pipe 21b when attached to or detached from the machine body, and therefore, it is not necessary to attach or detach the entire pipe 21 while passing it between the engine 7 and the frame of the machine body, and the work can be easily performed.

Further, according to the present embodiment, as shown in fig. 4, the flange 24 is disposed at the outer side in the machine body width direction (left-right direction) than the hood 47, so that the operator can easily extend his or her hand from the outside of the machine body to the flange portion formed at the end portion of the right pipe 21a and the left pipe 21b to divide or connect the pipes 21, and further, when the flange 24 is divided into the right pipe 21a and the left pipe 21b, the length of the left pipe 21b connected to the muffler 43 is short in the machine body width direction, so that the muffler 43 can be easily attached to or detached from the machine body in a state where the left pipe 21b is attached to the muffler 43.

Further, according to the present embodiment, as shown in fig. 4 and 5, since the heat insulating plate 28 is provided at the outside in the body width direction of the hood 47 covering the engine 7 and at the inside (the right side in the present embodiment) in the body width direction of the muffler 43, it is possible to prevent the heat of the muffler 43 from penetrating into the inside of the hood 47 and increasing the temperature in the vicinity of the engine 7.

Further, according to the present embodiment, as shown in fig. 6 (a) and 10, since the opening 75 is formed in the right side surface of the hood 47 and the outside air is supplied from the right to the left by the cooling fan 72 disposed on the right of the engine 7 and on the left of the radiator 71, the outside air can be supplied from the right to the radiator 71 on the right of the cooling fan 72 to cool the radiator.

Further, according to the present embodiment, as shown in fig. 4 and 6 (a), since the muffler 43 is disposed on the left side of the engine 7, the air heated by the muffler 43 can be prevented from flowing to the vicinity of the engine 7 located on the right side thereof.

Further, according to the present embodiment, as shown in fig. 8 (a) and 8 (b), since the opening 75 is formed in the right side surface of the hood 47 and the upper portion of the cooling fan 72 is located above the upper surface of the radiator 71, the flow of the outside air passing above the radiator 71 and heading toward the vicinity of the upper portion of the cooling fan 72 can be formed, and since the suction port 81 of the suction hose 80 is disposed at a position close to the upper portion of the cooling fan 72, a part of the outside air introduced into the engine room 54 through the opening 75 formed in the right side surface of the hood 47 can be supplied to the suction port 81 of the suction hose 80 and the upper portion of the cooling fan 72 in a normal temperature state without being heated by the fin portion of the radiator 71.

Further, according to the present embodiment, since the portion of the right side surface of the hood 47 that overlaps the upper portion of the cooling fan 72 located above the upper surface of the radiator 71 and the suction port 81 of the suction hose 80 in a side view is closed without forming an opening portion, when the washing water is injected from the right side of the hood 47 when the machine body is washed, the washing water can be prevented from entering the suction hose 80 that introduces air into the air cleaner 73, or the washing water can be prevented from splashing on the cooling fan 72.

Further, according to the present embodiment, as shown in fig. 11 (e), of the 2 fans 61 and 62 attached to the input shaft 50 to be input to the hydrostatic continuously variable transmission 25 (using the hub 55), the blades 68 of the sub-fan 62, which is the fan attached to the pulley 53 side of the input shaft 50, are formed thinner and smaller in diameter in the extending direction of the input shaft 50 than the blades of the main fan 61, which is the other fan, and therefore, the intake of air by the main fan 61, which is the fan on the side close to the hydrostatic continuously variable transmission, is not obstructed, and on the contrary, the sub-fan 62 can assist the intake of air, and therefore, air can be efficiently sent to the hydrostatic continuously variable transmission 25.

For example, in the embodiment shown in fig. 1 to 11, the muffler 43 is configured and arranged to be symmetrical front-to-back with respect to a vertical virtual plane Sv passing through the rotation center 41 of the flywheel 23 as a symmetrical plane on the left side of the engine 7 and below the floor pedal 60, but may be configured and arranged to be symmetrical front-to-back with respect to a vertical virtual plane passing through the rotation center of the flywheel as a symmetrical plane on the right side of the engine and below the floor pedal. Instead of the muffler 43, an exhaust gas purification device such as a DPF (Diesel Particulate Filter) may be provided at a position where the muffler 43 is disposed, the exhaust gas purification device may be supported by using the brackets 39 and 40 shown in fig. 3 and 4 in the same manner as in the case of the muffler, and the pipe 21 (left pipe 21 b) shown in fig. 3 and 4 may be connected to the front surface of the exhaust gas purification device in the same manner as in the muffler, whereby the same effects as those described in the embodiments shown in fig. 1 to 11 can be obtained. That is, the silencer 43 of the rice transplanter 1 of the embodiment shown in fig. 1 to 11 is directly replaced by an exhaust gas purification device. In this case, in order to obtain the same effect as that of the muffler 43, it is needless to say that the outer shape of the exhaust gas purifying device needs to be formed to be symmetrical in the front-rear direction with respect to a vertical virtual plane Sv (see fig. 3 c) including the rotation center 41 of the flywheel 23. According to the present invention, it is possible to suppress an excessive load from being applied to an exhaust system component and a support member thereof, such as a muffler and an exhaust gas purification device, which are introduced into exhaust gas of an engine.

In the embodiment shown in fig. 1 to 11, the muffler 43 is configured to reduce the exhaust sound of the engine 7, but may have both a muffler function of reducing the exhaust sound of the engine and an exhaust gas purification function.

In the embodiment shown in fig. 1 to 11, the heat insulating plate 28 is attached to the left side surface of the frame 37 extending in the front-rear direction, but may be attached to at least one of the pair of front and rear muffler brackets 39, 40. When the heat insulating plate is attached to the pair of front and rear muffler brackets, the heat insulating plate functions as a reinforcing member for the pair of muffler brackets, and vibration of the muffler can be further suppressed. In this case, when the muffler is detached from the machine body, the heat insulating plate can be detached from the machine body at the same time, and maintenance is improved.

Embodiments of the present invention and embodiments of the present invention related to the present invention will be described in detail with reference to the accompanying drawings.

In the following, some components may not be shown in the drawings, and may be shown in a perspective or omitted.

(A) First, the structure and operation of the rice transplanter according to the embodiment of the present invention will be specifically described with reference to fig. 12 to 15. In the background art, there is known a work vehicle such as a rice transplanter for transplanting rice seedlings while traveling (japanese patent laid-open No. 10-295128).

In view of various viewpoints, it is important to reduce the burden on the user.

However, in the case of a working vehicle such as the above-described conventional rice transplanter, the burden on the user is not necessarily reduced sufficiently as the working vehicle is increased in size.

In view of the above conventional problems, an object of the present invention is to provide a work vehicle capable of reducing the burden on a user associated with an increase in the size of the work vehicle.

Here, fig. 12 is a left side view of the rice transplanter in the embodiment of the present invention, fig. 13 (a) is a partial plan view of the vicinity of the seedling planting device 64 of the rice transplanter in the embodiment of the present invention, fig. 13 (b) is a partial rear view of the vicinity of the support frame 710 of the rice transplanter in the embodiment of the present invention, fig. 13 (c) is a partial plan view of the vicinity of the support frame 710 of the rice transplanter in the embodiment of the present invention, and fig. 14 is a partial left side view of the vicinity of the seedling planting device 64 of the rice transplanter in the embodiment of the present invention.

The rice transplanter of the present embodiment is a rice transplanter as follows: the land leveling machine is used for leveling a field by a land leveling device 260 having a land leveling rotating body member 261 and a land leveling hull member 262 while running by a running device having a pair of left and right front wheels 8 and rear wheels 9, transplanting seedlings to the field by a seedling transplanting device 64, and fertilizing to the field by a fertilizing device 26, according to control of a controller for manual driving operation or automatic driving operation in a control device 56 of the running vehicle 2.

The rice transplanter of the present embodiment is an example of the work vehicle of the present invention that transplants rice seedlings while traveling.

The support frame 710 is a frame that supports the plurality of seedling planting parts 69, the soil preparation rotation body part 261, and the soil preparation hull part 262, which are arranged in a lateral direction of the vehicle body. The longitudinal direction of the support frame 710 is the vehicle body left-right direction. The outer end of the support frame 710 is foldable toward the center of the vehicle body in the left-right direction of the vehicle body. The aluminum frame pivot of the support frame 710 is provided on a straight line defined by the seedling extraction amount adjustment lever pivot of the support 750 and the reinforcement frame pivot of the reinforcement 740 behind the frame of the support 750. An upward 90 degree fold of the aluminum frame is achieved as indicated by the arrow X associated with the support frame 710. Since such folding mechanisms are provided at the outer ends of both sides of the support frame 710 in the lateral direction of the vehicle body, the seedling planting unit can be compactly stored by folding both sides.

The seedling planting section driving shaft 720 is a member that drives the seedling planting section 69 and has a longitudinal direction in the vehicle body left-right direction. The outer end of the seedling planting portion driving shaft 720 can be detached or can be folded toward the center of the vehicle body in the left-right direction of the vehicle body. In the present embodiment, the outer end of the seedling planting portion driving shaft 720 can be folded toward the center of the vehicle body in the left-right direction of the vehicle body. The driving part can be rotated together with the aluminum frame by the driving part universal joint structure related to the seedling planting part driving shaft 720. The driving part of the seedling planting part driving shaft 720 does not need to be detached along with folding, and the adjustment operation such as so-called phase alignment is also not needed, so that the convenience of use is improved.

The land rotor drive shaft 730 is a member that drives the land rotor member 261 and has a longitudinal direction in the vehicle body left-right direction. The outer end of the land preparing rotator driving shaft 730 can be detached or can be folded toward the center of the vehicle body in the left-right direction of the vehicle body. In the present embodiment, the outer end of the land preparation rotator drive shaft 730 is detachable. By freely attaching and detaching the rotary body to and from the aluminum frame of the support frame 710, the rotary body can be housed compactly, in relation to the land preparation rotary body member 261.

The reinforcing member 740 is a member that connects and reinforces the plurality of seedling planting parts 69 and has a longitudinal direction in the vehicle body left-right direction. The outer end of the reinforcing member 740 is detachable or foldable toward the center of the vehicle body in the left-right direction of the vehicle body. In the present embodiment, the outer end of the reinforcing member 740 is foldable toward the center of the vehicle body in the lateral direction of the vehicle body.

The seedling stage support rail 620 is a rail for supporting the seedling stage 65 on which seedlings to be planted are placed. The support member 750 is a member that is rotatable in the vehicle body left-right direction in the longitudinal direction and supports the seedling stage support rail 620 from below so as to be able to adjust the distance between the seedling stage 65 and the seedling planting section 69. The outer side end of the stay 750 can be detached or can be folded toward the center of the vehicle body in the left-right direction of the vehicle body. In the present embodiment, the outer end of the stay 750 is foldable toward the center of the vehicle body in the left-right direction of the vehicle body.

Of the four parts of the seedling planting part driving shaft 720, the soil preparation rotating body driving shaft 730, the reinforcing part 740, and the supporting part 750, the outer end of at least one part can be folded. The position of the folded portion of at least one member coincides with the position of the folded portion of the support frame 710 in the vehicle body left-right direction and the up-down direction. In this embodiment, the outer ends of the seedling planting part driving shaft 720, the reinforcing member 740, and the support member 750 are foldable, and at least the positions of the folding portions of the reinforcing member 740 and the support member 750 coincide with the positions of the folding portions of the support frame 710 in the vehicle body left-right direction and the vertical direction. For example, since the frame can be fixed by fastening the folding manual operation portion 711m such as a knob provided below the aluminum frame of the support frame 710, one operation for folding the support frame can be realized only by easy knob rotation.

(B) Next, the structure and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

(B1) First, description is mainly given with reference to fig. 15.

Here, fig. 15 is a partial plan view of the vicinity of the reinforcement 740 of the rice planting machine according to the embodiment of the present invention.

The outer end 620e of the seedling support rail 620, which supports the seedling support 65 in the lateral direction of the vehicle body, is detachably fixed to the center 620c of the seedling support rail 620. The outer end 620e detached from the central portion 620c can be engaged with the vicinity of the plurality of seedling planting portions 69 arranged in the left-right direction of the vehicle body.

The locking of the outer end 620e of the seedling stage support rail 620 may be performed by attraction with a magnet or by fastening with a screw.

The outer end 620e locked to the vicinity of the plurality of seedling planting parts 69 is detachably fixed to a reinforcing member 740, and the reinforcing member 740 connects and reinforces the plurality of seedling planting parts 69, and the longitudinal direction is the vehicle body lateral direction.

Of course, the outer end 620e may be fixed to a portion near the plurality of seedling planting units 69 such as the central portion 620c after being detached from the central portion 620c.

A seedling platform support rail fixing member 621 is provided for detachably fixing the outer end 620e to the central portion 620c. The outer end 620e, which is locked near the plurality of seedling planting parts 69, is detachably fixed to the reinforcing member 740 by using the seedling stage support rail fixing member 621.

As shown in fig. 15, it is preferable that the outer ends 620e of 2 so-called side seedling support plates are fixed by fastening the seedling stage support rail fixing members 621 such as 2 knob bolts to the nut members 741 provided in the reinforcing member 740. Since the vehicle is fixed by strong bolt and nut fastening, the outer end 620e detached from the center 620c and housed therein hardly falls off the traveling vehicle 2 due to vibration or the like.

That is, in the riding rice transplanter, the end of the seedling support plate of the seedling planting unit is configured to be detachable, and a fixing member (a nut and a knob bolt) for fixing the seedling support plates to each other is provided in the seedling planting unit so as to be in a use state, and the seedling support plate can be detached by detaching the fixing member, and the detached seedling support plate can be clamped to the seedling support plate that is not detached from the seedling planting unit, or fixed by the fixing member. The effect of preventing the vibration from dropping and breaking is achieved.

The seedling support plate at the center of the seedling planting part is provided with a locking member for locking the removed seedling support plate by a fixing member, the locking member is positioned between the plurality of planting rods arranged in the left-right direction, and the locking member is configured to be capable of locking the left and right seedling support plates in a manner of fixing the seedling support plates at the left and right end parts.

(B2) Next, description will be made mainly with reference to fig. 16 and 17.

Here, fig. 16 is a partial left side view of the rice transplanter in the vicinity of the soil preparation rotator drive shaft suspension 735, and fig. 17 is a partial top view of the rice transplanter in the vicinity of the support frame fixture 711 and the soil preparation rotator drive shaft fixture 731 in the embodiment of the present invention.

An outer end portion 730e of the land rotor drive shaft 730, which drives the land rotor member 261 and whose longitudinal direction is the vehicle body left-right direction, is fixed to a central portion 730c of the land rotor drive shaft 730 so as to be separable. A land preparation rotator drive shaft suspending member 735 is provided to suspend the outer end 730e cut away from the central portion 730c.

As shown in fig. 17, the stored land preparation rotator member 261 is preferably pulled by a land preparation rotator drive shaft suspending piece 735 such as a spring provided at a pivot point portion for the storage-side land preparation rotator, and therefore does not sag due to its own weight or the like.

The outer end 730e separated from the central portion 730c is urged to move upward by driving the suspending member 735 with the land rotator.

When the rice seedling planting part is stored along with the folding of the side soil preparation rotating body, the side soil preparation rotating body which causes the expansion of the outer end part 730e in the left and right direction of the vehicle body hardly hangs down due to the upward spring force indicated by the arrow Y, therefore, the rice seedling planting part is easy to store, and the width of the vehicle body of the rice transplanter along with the rotation of the side soil preparation rotating body is difficult to be larger than the width of the loading container of the rice transplanter.

That is, the present invention includes: the member is supported by the seedling planting part, and when the end part of the seedling planting part is folded to fold the land preparation rotating body and the end part land preparation rotating body is taken down from the land preparation rotating body at the base part side of the seedling planting part, the land preparation rotating body can not droop due to self weight. Therefore, the following effects are exerted: prevent the side soil preparation rotator from drooping and being difficult to be stored when the seedling transplanting part is stored due to no spring. In addition, the following effects can be exhibited: the side soil preparation rotary body is prevented from rotating, and the width of the transplanter body is wider than the width of a cargo box of a truck.

(B3) Next, description will be given mainly with reference to fig. 17 and 18.

Here, fig. 18 is a partial plan view of the vicinity of the seedling planting part driving shaft 720 of the rice transplanter according to the embodiment of the present invention.

A support frame fixing member 711 is provided, and the outer end portion 710e of the support frame 710 is fixed to the central portion 710c of the support frame 710 in a foldable manner by the support frame fixing member 711, wherein the support frame 710 supports a plurality of seedling planting portions 69 arranged in the left-right direction of the vehicle body, and the longitudinal direction is the left-right direction of the vehicle body. A land preparation rotator drive shaft fixing member 731 is provided to detachably fix the outer end 730e of the land preparation rotator drive shaft 730 to the central portion 730c of the land preparation rotator drive shaft 730. The position of the folding manual operation portion 711m of the support frame mount 711 and the position of the manual operation portion 731m of the land rotor drive shaft mount 731 are shifted from each other with respect to the vehicle body left-right direction.

In folding the land rotator member 261, after the fixing pins 731p for fixing the outer end 730e to the center portion 730c are removed, by turning the manual operation portion 731m for removing a knob for manually operating a land rotator knob bolt without a jig, the outer end 730e removed from the center portion 730c is moved in a direction away from the center of the vehicle body in the left-right direction of the vehicle body, and the outer end 730e is removed.

As shown in fig. 17, it is preferable to provide a height difference D between the position where manual operation part 711m is folded and the position where manual operation part 731m is cut. Therefore, when the folding manual operation part 711m for manually operating the seedling planting part knob bolt is rotated by fingers, the fingers rotating the folding manual operation part 711m are less likely to interfere with the manual operation part 731m for manually operating the soil preparation rotation body knob bolt, and thus the manual operation of the seedling planting part knob bolt is facilitated. Similarly, when the manual operation part 731m is separated by turning with a finger, the finger that has turned the manual operation part 731m is less likely to interfere with the folding manual operation part 711m, and therefore, the hand operation of the land preparation rotator knob bolt is facilitated.

As shown in fig. 18, it is preferable that the phase of the 2 universal joints 721 of the seedling planting part driving shaft 720 at the seedling planting stop position have directionality enabling folding of the support frame 710. In order to prevent the phase of the universal joint at the seedling planting stop position from hindering the folding of the support frame and to prevent the driving adjustment work such as troublesome manual operation from being performed, the driving of the seedling planting driving shaft 720 for the seedling planting transmission is stopped by the automatic adjustment process, and therefore, the efficiency of the work accompanying such folding of the support frame is improved by facilitating the work.

Namely, the following structure is considered: the folding operation device is provided with a folding operation device for folding the rotating body and a folding operation device for folding the frame of the seedling transplanting part, the folding operation device has a height difference in a plan view, and the universal joint phase of the folding part is set to be a folding direction at the transplanting stopping position on the transplanting transmission shaft. This makes it possible to facilitate the folding operation of the seedling planting part and the rotating body. When the knob bolt is turned, the effect of easy turning can be exerted.

Claims (6)

1. A traveling vehicle is characterized by comprising:

an engine (7) provided at the front of the machine body; and

a muffler (43) or an exhaust gas purification device that is introduced into the exhaust gas of the engine (7),

the muffler (43) or the exhaust gas purification device is supported by a support member, and the support member is coupled to an engine base.

2. The running vehicle according to claim 1,

a first pipe (21 a) extending from the engine (7) to the muffler (43) or the exhaust gas purification device is connected to a second pipe (21 b) located outside the first pipe (21 a) in the machine body width direction,

the second pipe (21 b) is connected to the muffler (43) or the exhaust gas purification device,

the second pipe (21 b) is shorter than the first pipe (21 a).

3. The running vehicle according to claim 1 or 2,

a heat shield plate (28) for thermally isolating the muffler (43) or the exhaust gas purification device is provided on the outer side in the width direction of the engine body than a hood (47) covering the engine (7), below a bottom step plate (60), and on the inner side in the width direction of the engine body than the muffler (43) or the exhaust gas purification device.

4. The running vehicle according to claim 1 or 2,

an air cleaner (73) and an intake hose (80) for introducing air into the air cleaner (73) are disposed in an engine room (54) covered with a hood (47),

the opening (75) is not formed at a portion overlapping the suction port (81) of the suction hose (80) when viewed from the side.

5. The running vehicle according to claim 4,

the running vehicle is provided with a radiator (71) and a fan (72) that release heat of the engine (7),

a part of the heat sink (71) and the fan (72) do not overlap when viewed from the side,

the suction port (81) is disposed at a position close to a part of the fan (72).

6. The running vehicle according to claim 5,

the upper portion of the fan (72) is configured to be positioned above the upper surface of the heat sink (71).

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