JP3646395B2 - Traveling vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement around an engine in a traveling vehicle.
[0002]
[Prior art]
As a traveling vehicle for rice transplanters, there is a so-called midship type vehicle in which an engine is arranged below the cockpit at the front and rear center of the fuselage. In this type of traveling vehicle, the upper part of the engine is covered with the engine cover that serves as the upper part, the front part, and the left and right side parts also serve as the pedestal of the cockpit, so the exhaust heat of the muffler tends to be trapped in the engine cover. There was a problem of poor cooling efficiency.
[0003]
[Problems to be solved by the invention]
The present invention is for solving the above-described problems, and the engine periphery is configured as follows.
[0004]
[Means for Solving the Problems]
That is, the traveling vehicle according to the present invention includes a radiator , a fuel tank, and a control box disposed on one side of the engine in a traveling vehicle provided with an engine cover that covers the engine , and the front portion of the radiator and the front of the engine. The rear part of the radiator and the rear part of the engine are connected by a high temperature cooling water pipe, and the rear part of the main step provided around the engine cover is made high so as not to interfere with the rear wheels. , further place the muffler on the side of the radiator opposite side of the engine, air by the cooling fan of the radiator is characterized in that a structure that flows from the radiator side to the muffler side.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The traveling vehicle illustrated in the figure is used as a propulsion and power vehicle for a riding fertilizer planting machine, and the planting unit 4 can be moved up and down via a lifting link device 3 on the rear side of the traveling vehicle 1. In addition to being mounted, a fertilizer application device 5 is mounted across the traveling vehicle 1 and the planting part 4.
[0006]
The traveling vehicle 1 is a four-wheel drive vehicle including a pair of left and right front wheels 7 and 7 and rear wheels 8 and 8 which are drive wheels. Front wheel axle frames 11, 11 extend from the left and right side surfaces of the transmission case 10 arranged at the front of the aircraft to the left and right sides, and front wheel final cases 12, 12 are provided at the ends of the front wheel axle frames 11, 11. Further, front wheel support cases 13 and 13 are provided on the lower side of the front wheel final case so as to be able to change the direction, and the front wheels 7 and 7 are attached to front wheel axles 7a and 7a protruding laterally from the outer side thereof. A front end portion of a pair of left and right vertical frames 15 and 15 is fixed to the rear portion of the mission case 10, and a horizontal frame 16 is fixed to the rear end portions of the vertical frames. A rear wheel rolling shaft 17 is fitted in the center of the left and right sides of the horizontal frame 16 in a fixed state with the axis centered in the front-rear and horizontal directions, and the left and right sides of the rear wheel frame 18 supported on the rear wheel rolling shaft 17 in a freely rolling manner. Rear wheel gear cases 19, 19 are provided at the ends, and rear wheels 8, 8 are attached to rear wheel axles 8 a, 8 a that protrude laterally from the outer side of the rear wheel gear case, and auxiliary wheels 20, 20 are further provided outside the rear wheel axles 8 a, 8 a. Is attached.
[0007]
This traveling vehicle 1 has a midship type configuration in which an engine is arranged at the front and rear center portions of the airframe, and a water-cooled two-cylinder engine 23 is mounted on a horizontal engine base 22 fixed to the vertical frames 15 and 15. Are mounted with the output shafts 23a, 23b projecting left and right. An engine cover 24 is provided on the upper side of the engine 23 and covers the upper, front and left and right sides of the upper part of the engine.
[0008]
A radiator 26 is provided on the right side of the engine 23, a lower end front portion of the radiator 26 and a left front corner portion of the engine 23 are connected by a low-temperature cooling water pipe 27, and an upper end rear portion of the radiator 26 and a right rear corner portion of the engine 23. Are connected by a high-temperature cooling water pipe 28 so that the cooling water circulates between the engine 23 and the radiator 26. A cooling fan 31 driven by the output shaft 23b is provided in the wind tunnel 30 whose one end is in contact with the inner side surface of the radiator 26. When the cooling fan 31 is rotated, the cooling air passes through the radiator 26 from the right side to the left side, and heat dissipation of the radiator 26 is promoted. The cooling air that has passed through the radiator 26 is blown out from the space between the engine 23 and the wind tunnel 30 and flows to the left along the front, back, and bottom of the engine 23.
[0009]
The exhaust ports of the engine 23 are located at the upper front and rear ends of the left side surface, and exhaust pipes 33, 33 connected to the exhaust ports are connected to the muffler 34. The muffler 34 is provided on the left side of the engine 23 and slightly below the engine 23. For this reason, the heat of the muffler 34 is not easily trapped in the engine cover 24, and the exhaust of the muffler 34 is caused to flow to the left by the wind from the cooling fan 31.
[0010]
An air cleaner 36 is disposed on the upper right side of the engine 23. A fuel tank 37 is disposed on the right side of the engine 23 and below the steps 54 and 55 described later. The fuel supply port 37 a of the fuel tank 37 is located outside the expansion step 55.
[0011]
The rotational power of the engine 23 is taken out by the output shaft 23a protruding from the left side surface of the engine, and the rotation of the output shaft 23a is transferred to the drive shaft 40a of the hydraulic pump 40 provided on the transmission case 10 to the first belt transmission device 41. And is further transmitted from the pump drive shaft 40a to the transmission case input shaft 10a by a continuously variable second belt transmission 42.
[0012]
The rotational power transmitted into the mission case 10 is changed by the transmission. The front wheel driving power drives the front wheels 7 and 7 via the transmission mechanisms in the front wheel axle frames 11 and 11, the front wheel final cases 12 and 12, and the front wheel support cases 13 and 13, and the rear wheel driving power expands and contracts. The rear wheel drive shafts 43 and 43 are transmitted to the rear wheel gear cases 19 and 19 to drive the rear wheels 8 and 8, and the power for driving the planting part is transferred to the planting clutch 46 by the first planting transmission shaft 45. It is transmitted, and the planting part 4 and the fertilizer application apparatus 5 are driven.
[0013]
A cockpit 50 is installed on the engine cover 24. Further, a handle 52 for steering the front wheels 7 and 7 is provided above the front cover 51 at the center upper side of the front part of the machine body. Around the engine cover 24 and the front cover 51 are horizontal main steps 54. A control box 53 is provided on the right side of the cockpit 50. The rear part 54a of the main step 54 is raised so as not to interfere with the rear wheels 8,8. Extended steps 55 and 55 are provided on the left and right sides of the rear portion of the main step 54 so that the step surface is substantially at the same level as the main step 54. In the expansion steps 55 and 55, the rear portions 55a and 55a are also high. On the lower side of the expansion steps 55, 55, lifting steps 56, 56 used when getting on and off the step from the left and right sides of the body are provided.
[0014]
On the left and right sides of the front part of the aircraft, there are provided spare seedling stands 58 and 58 on which seedling boxes containing supplementary seedlings are placed. The preliminary seedling stage 58 is provided with a support post 58b on the preliminary seedling stage frame 58a so as to be rotatable in a horizontal plane, and provided with a seedling frame frame 58c mounted on the support post so as to be rotatable about a vertical axis. .. Are attached to the frame frame at predetermined intervals.
[0015]
As shown in FIG. 7, when the seedling box 59 is configured such that the end 59a of the bottom plate can be turned upward, the seedling N can be easily taken out from the seedling box when the seedling is replenished. The length of the rotating portion 59a of the bottom plate is preferably an integral multiple of the pot width of the seedling N, and the seedling N should be bent without difficulty when the rotating portion 59a is rotated upward. Further, a protrusion 59b is provided for restricting the movement so that the rotating portion 59a does not rotate upward unless pushed up with a certain amount of force.
[0016]
The traveling vehicle 1 can be controlled automatically by a gyro sensor. However, if the control output is frequently given during the automatic linear control, such as when the unevenness of the field scene is severe, the automatic linear control is turned off. It is trying to become. In such a case, manual operation by the handle 52 is performed to prevent hunting of the straight-ahead control. When the automatic linear advance control is OFF, the automatic linear advance lamp 53a provided in the control box 53 blinks and is displayed.
[0017]
The elevating link device 3 includes an upper link 61 and a lower link 62, 62 that are rotatably attached to a link base 60 that is fixed to the rear ends of the vertical frames 15, 15, and the rear of these upper and lower links. A vertical link 63 is connected to the end. Then, the connecting shaft 64 fixed to the planting part side is rotatably inserted and connected to the bearing part projecting rearward from the lower end part of the vertical link 63 so that the planting part 4 is rotatable to the left and right with respect to the traveling direction. Installed. The hydraulic cylinder 66 for driving the lifting link device is pivotally supported by a support member whose base side is fixed to the vertical frames 15 and 15, and its piston rod side is provided at the lower end of a swing arm 67 provided integrally with the base of the upper link 61. It is connected. When the hydraulic cylinder 66 is expanded and contracted, the lifting / lowering link device 3 is lifted / lowered, and the planting part 4 is lifted / lowered with a fixed posture.
[0018]
The planting part 4 has a structure of eight-row planting, and a total of eight sets of seedling mounts 71 on which seedlings for eight strips are placed on a transmission case 70 that also serves as a frame, and the seedlings on the seedling mounts are planted in a field scene. Planting devices 72, etc. are assembled. The transmission case 70 is transmitted from the planting clutch case 46 via the second planting transmission shaft 72. Under the planting part 4, four float leveling floats 74 are provided. When these floats 74 are grounded on the mud surface of the field, they receive a part of the weight of the aircraft, When the aircraft is advanced with the ... grounded, the float slides while leveling the muddy surface. Rakes 75,... For leveling the mud surface are provided at the space between the float and the float.
[0019]
The floats 74,... Are pivotably attached so that the front end side moves up and down according to the unevenness of the farm scene. During the planting operation, the angle of attack of the float is detected by the potentiometer 75, and the angle of attack is a predetermined angle. The hydraulic cylinder 66 is operated so as to reach the control target value, and the planting unit 4 is moved up and down. Specifically, when the float rides on the convex part of the field and the angle of attack becomes small, the planting part 4 is raised, and when the float falls into the concave part of the field and the angle of attack becomes large, the planting part 4 is lowered. This keeps the seedling planting depth constant at all times.
[0020]
By the way, the harder the soil, the higher the response of the float to the unevenness of the field scene. Therefore, if the control sensitivity is always constant, hunting is likely to occur in a field where the soil is hard, and control followability deteriorates in a field where the soil is soft. Therefore, the sensitivity lever 77 adjusts the control sensitivity according to the hardness of the soil.
[0021]
In addition, the faster the aircraft travels, the greater the resistance that the float receives, and the angle of attack tends to fluctuate. Therefore, the resistance of the water flow is detected by the resistance sensor 78 provided in the float at the center, and the detection of the resistance sensor 78 According to the result, the control target value of the angle of attack is corrected, and the control sensitivity is automatically adjusted. For example, when the traveling speed is high, the control sensitivity is insensitive. Note that the control sensitivity may be adjusted by moving the sensitivity lever 77 in accordance with the detection result of the resistance sensor 78.
[0022]
The fertilizer applicator 5 is provided with fertilizer tanks 80, 80 and fertilizer feeders 81, ... on the rear upper side of the traveling vehicle 1, and is provided with groove forming tools 82, ... and fertilizer guides 83, ... on both sides of the floats 74, ... The fertilizer feeders 81,... And the fertilizer guides 83,... Of the respective strips are connected by flexible fertilizer hoses 84,... The fertilizer is fed into the fertilizer guide 83, ... by the compressed air generated by the blower 85, and dropped into the fertilizer groove formed in the field by the grooving tool 82, ... Yes.
[0023]
【The invention's effect】
As described above, in the traveling vehicle according to the present invention, the wind from the cooling fan of the radiator flows from the radiator side to the muffler side around the engine, so that the high heat of the muffler is directed to the outside of the engine cover. It is easy to be discharged, and the cooling efficiency of the engine is improved. Although the traveling vehicle described as the embodiment of the invention has a midship type configuration in which the engine is arranged in the front and rear center part of the airframe, the present invention is not limited to this.
[Brief description of the drawings]
FIG. 1 is a side view of a riding fertilizer transplanter.
FIG. 2 is a plan view of a riding fertilizer transplanter.
FIG. 3 is a plan view in which a part of the riding fertilizer transplanter is omitted.
FIG. 4 is a plan view around the engine.
FIG. 5 is a side view around the engine.
FIG. 6 is a rear view around the engine.
7A is a plan view showing a part of a seedling box, and FIG. 7B is a side cross-sectional view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling vehicle 3 Lifting link apparatus 4 Planting part 5 Fertilizer 23 Engine 24 Engine cover 26 Radiator 31 Cooling fan 34 Muffler 50 Pilot seat

Claims (1)

In a traveling vehicle provided with an engine cover that covers the engine, a radiator , a fuel tank, and a control box are arranged on one side of the engine , and the front portion of the radiator and the front portion of the engine are connected by a low-temperature cooling water pipe. The rear part of the radiator and the rear part of the engine are connected by a high-temperature cooling water pipe, and the rear part of the main step provided around the engine cover is made high so as not to interfere with the rear wheels . A traveling vehicle having a structure in which a muffler is disposed on a side, and wind from a cooling fan of the radiator flows from the radiator side to the muffler side.

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