JP3075593B2 - Passenger work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding-type work vehicle in which the layout of each device mounted on an airframe is improved.

[0002]

2. Description of the Related Art Generally, in a four-wheeled riding work vehicle such as a rice transplanter having a working device supported up and down behind a traveling machine body, a collision with a ridge or a headland is prevented when the headland goes around. It is necessary to shorten the distance from the front wheels to the front end of the aircraft in order to reduce the number of manual plantings to
When transporting the aircraft, to facilitate loading on trucks,
It is desired that the overall length of the aircraft be as short as possible. However, in a conventional riding-type work vehicle, as in a riding type rice transplanter shown in FIG. 6, for example, a steering shaft c is directed toward a driver's seat d from a rear part of a transmission case b provided below a driver's seat step a. Due to structural restrictions such as installation, the driver's seat is located at the rear of the aircraft, and in order to balance the weight of the aircraft forward and backward, the engine is mounted with the aircraft frame protruding forward. However, there was a problem that the total length of the aircraft was inevitably increased.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the whole body is made compact by improving the layout of each device mounted on the body. It is an object of the present invention to provide a riding-type work vehicle that can prevent a danger of colliding with a ridge during headland circulation, and that can easily be loaded on a truck or the like during transportation of an airframe. It is what it was.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, a technical means taken by the present invention is a four-wheeled riding type work vehicle having a working device supported up and down behind a traveling body, A front axle and a front axle input shaft are provided below the front of the driver's seat step, a transmission case is arranged so that all gear groups are located ahead of the front axle input shaft, and the steering input shaft is Ahead of the front axle input shaft , and
The pitman arm is inserted into the transmission case from the middle position of the transmission case, which is located above the rear side of the gear group, and is taken out below the front end of the transmission case.
An engine is disposed above the front end of the transmission case and a battery is disposed below the engine at a position on the front side of the transmission case to reduce the distance from the front end of the front wheels to the front end of the traveling vehicle. It is characterized by being formed in this way.

[0005]

Therefore, according to the present invention, the front axle input shaft and the front axle are located below the front of the driver's seat step, and in the transmission case, all gear groups are located forward of the front axle input shaft. Therefore, the position of the center of gravity of the aircraft is on the front side of the aircraft. And
Steering input shaft ahead of front axle input shaft
Write a, and since the projects into the transmission case from the position of the transmission case midway the rear side above the upper Symbol gears, duplicate distributing the engine on the front of the steering input shaft, the front end above the transmission case If set, engine
The distance between the front end of the front wheels and the front end of the traveling body is reduced without causing the front end of the vehicle to protrude greatly . Also mission
The steering input shaft , located in the middle of the case ,
A steering input shaft is provided at the rear of the transmission case.
Since it is located on the front side of the body compared to the conventional one, the position of the driver's seat can be set forward and the overall length of the body can be shortened. In addition, a battery is disposed on the front side of the transmission case below the engine, which is located above the front end of the transmission case.
Since the pitman arm is taken out below the front end, it is possible to maintain a good balance of the weight of the aircraft in the front-rear direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a traveling body of a riding type rice transplanter exemplified as a riding type work vehicle, in which an engine 5 is mounted on a body frame 4 having a front wheel 2 and a rear wheel 3, and a driver's seat 6 is provided behind the engine 5. I have. Reference numeral 7 denotes a planting unit as a working device including a seedling mounting table 8, a float 9, a seedling planting rod 10, and the like. The planting unit 7 can move up and down behind the traveling machine 1 via a hydraulic link 11. Supported. The body frame 4 includes an upper frame 12 and a lower frame 13 shorter than the upper frame 12, and a rear end thereof is connected and fixed by a horizontal frame 14. 15 is the driver's seat 6
The front axle 16 and the front axle input shaft 17 are provided in a state located below the front of the step 15, and the front wheel 2 is supported by the front axle 16. Reference numeral 18 denotes a mission case. The rear surface of the mission case 18 is
Mission case mounting plate 1 fixed to the front end of 3
9 are fixed via bolts 20, 20, and the left and right sides of the transmission case 18 are fixed via bolts 22 to a front axle case 21 fixed to the upper frame 12. 23 is an input shaft from the engine 5, and 24 is a ring gear of a front wheel differential mechanism. The transmission case 18 is configured such that all of the gear groups housed therein are disposed forward of the front axle input shaft 17. Further, the transmission case 18 is formed so as to be dividable left and right along the mating surface A in the front-rear direction, and only one of the transmission cases 18 can be separated and removed.

Reference numeral 25 denotes a steering input shaft which is provided upright in front of the driver's seat 6, and a steering wheel 26 is mounted on an upper end thereof. As shown in FIG. 5, the lower end of the steering input shaft 25 is located forward of the front axle input shaft 17 and on the rear side of the gear group.
The transmission case 18 protrudes into the transmission case 18 from the middle position in the front-rear direction of the transmission case 18 located above. Reference numeral 27 denotes a counter shaft that is linked to the steering input shaft 25, and reference numeral 28 denotes a sector gear mounted on a sector shaft 29, which is configured to take out a pitman arm 30 attached to the lower end of the sector shaft 29 from below the front end of the transmission case 18. The drag link 31 connected to the pitman arm 30 interlocks with the operation of the steering wheel 26 to steer the front wheel 2.

An engine base 32 is fixed to the front end of the upper frame 12. The engine 5 is mounted and fixed to the engine base 32 so that the engine 5 is not obstructed by the steering input shaft 25 and the transmission case 18 Are arranged in an overlapping manner at a position above the front end of the vehicle. 3
Reference numeral 3 denotes an output shaft of the engine 5, reference numeral 34 denotes a belt for interlocking the output shaft 33 and the input shaft 23, and reference numeral 35 denotes an auxiliary transmission lever.
Reference numeral 36 denotes a battery for power supply,
The battery 36 is supported by a battery case 37 provided at the end of the transmission case 18 via a battery mounting table 38, and is disposed below the engine 5 and at the front end side of the transmission case 18. The battery mounting table 38 is supported via a pin in a guide groove provided in the battery case 37, and can be moved to a storage position and a side pull-out position. Reference numeral 39 denotes a rear axle on which the rear wheel 3 is mounted. The rear axle 39 includes a mounting plate 40 provided at a rear end of the upper frame 12 and a lower frame 1.
3 is supported by a mounting plate 41 provided at the rear end. Reference numeral 42 denotes a power transmission shaft from the transmission case 18. 43 is a seat support frame, 44 is a footrest for getting on and off, and 45 is a hydraulic cylinder.

In the above-described configuration, the four-wheeled traveling body 1 has the front axle 16 and the front axle input shaft 17 provided below the front surface of the step 15 of the driver's seat 6 and the transmission case 18 has all the gear groups in the front. Since it is configured to be disposed forward of the axle input shaft 17, heavy members can be concentrated on the front part and the center of gravity of the aircraft can be positioned forward. Driver's seat 6
The steering input shaft 25 erected at the front of the transmission case 18 protrudes from the front of the front axle input shaft 17 to a position in the middle of the transmission case 18 in the front-rear direction. Since the driver's seat 6 is located in front of the fuselage, the entire length L of the fuselage can be made short and compact. The engine 5 fixed to the engine base 32 is arranged in an overlapping manner at a position above the front end of the transmission case 18, so that the engine 5 does not protrude significantly forward, and extends from the front end of the front wheel 2 to the front end of the traveling machine body 1. Distance becomes shorter. Further and battery 36 is disposed on the front side of the transmission case 18 below the engine 5, Matami
Pitman arm 3 from below the front end of the case 18
Since the zero is taken out, the position of the center of gravity of the aircraft is further forward, and the front-rear weight balance of the aircraft can be maintained well. Therefore, it is possible to prevent the risk that the tip of the body collides with the ridge at the time of headland circulation, and to circulate at a position close to the ridge, so that the hand-planting operation at the headland can be reduced. Moreover, since the engine 5, the transmission case 18 and the like are independently mounted and supported on the upper frame 12, the mounting structure can be simplified and the weight of the machine can be further reduced. For this reason, even when working in paddy fields, the sinking of the body is reduced, and it is possible to sufficiently cope with a small wheel diameter. On the other hand, at the time of transporting the airframe, the compact traveling airframe 1 can be easily loaded on a truck or the like.

[0010]

In summary, the present invention relates to a front axle and a front axle which are located below a front surface of a driver's seat step in a four-wheel passenger work vehicle having a working device supported up and down behind a traveling machine body. Provide an input shaft,
A transmission case is arranged so that all gear groups are located ahead of the front axle input shaft, and the steering input shaft is located forward of the front axle input shaft .
The pitman arm is protruded into the transmission case from the middle of the transmission case, which is located at the rear upper side of the gear group, and the pitman arm is taken out below the front end of the transmission case, and the engine is overlapped above the front end side of the transmission case. A battery is arranged below the engine at the front end side of the transmission case to reduce the distance from the front end of the front wheels to the front end of the traveling vehicle body. Since the driver's seat can be arranged at the front position while being concentrated on the front part of the body, the entire body can be shortened and the weight can be reduced. For this reason, even in the paddy field operation, the sinking amount of the body is reduced, so that even if the wheel diameter is reduced, it is possible to sufficiently cope with the wheel diameter, and it is possible to smoothly travel on the headland. In addition, when the aircraft is transported, it can be easily loaded onto a truck or the like.

[0011]

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a side view of a main part.

FIG. 3 is a plan view of the same.

FIG. 4 is a rear view of a main part.

FIG. 5 is a vertical sectional side view of a transmission case.

FIG. 6 is a side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2 Front wheel 3 Rear wheel 5 Engine 6 Driver's seat 15 Step 16 Front axle 17 Front axle input shaft 18 Transmission case 25 Steering input shaft 30 Pitman arm 36 Battery

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-254058 (JP, A) JP-A 63-125620 (JP, U) JP-A 2-144886 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B60K 17/00-17/36 B60B 35/14 B62D 1/20 B62D 7/08

Claims (1)

(57) [Claims] A front axle and a front axle input shaft provided below a front surface of a driver's seat step in a four-wheel passenger work vehicle having a working device supported up and down behind a traveling machine body; A transmission case is arranged so that all gear groups are located ahead of the axle input shaft, and the steering input shaft is located forward of the front axle input shaft and above the rear side of the gear group.
By projects into the transmission case from the position of the transmission case midway become, the front end lower portion of the transmission case with taking out the pitman arm, an engine front side above the transmission case overlap arrangement, below the engine And a battery disposed at a position on the front end side of the transmission case to reduce the distance from the front end of the front wheels to the front end of the traveling machine body.