JPH03213432A - Transmission structure of riding working machine - Google Patents

Abstract

PURPOSE:To improve weight balance of a machine body, and also to shorten the front part of the machine body by constituting the structure in such a way that the front end of an engine, the front end of a transmission, and the front ends of front wheels being fitted on a front axle are vertically positioned nearly in the same plane. CONSTITUTION:In a riding rice-planting machine, and engine 5 is mounted on the front part of the body frame 4 of a traveling machine body 1, and on the rear side of a hood 6 for covering the engine 5, a driving operation part 10 comprising a steering wheel 7, a main change lever 8, an auxiliary change gear 9, or the like is provided. And a transmission 17 for transmitting the power of the engine 5 to the traveling part and to respective working parts is arranged above a front axle 18. In this case, the upper surface of a transmission case 19 is formed nearly in the horizontal, and the engine 5 is fixed to a fitting frame 42 which has been mounted between the rear end of the transmission case 19 and a bumper 40, so that the front end of the engine 5, the front end of the transmission 17, and the front ends of front wheels 2 are vertically positioned nearly in the same plane.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission structure for a riding work machine having an engine mounted in the front part of the machine body.

[Conventional technology]

Generally, riding working machines such as rice transplanters have an engine mounted on the front of the machine, and the power from the engine is transmitted to each part of the machine via a transmission installed above the front axle. Since the gear lever, steering shaft, etc. protrude from the top of the transmission case, the engine mounted on the aircraft is located above and in front of the transmission.

[Problems to be solved by the present invention]

However, when the engine is installed above and in front of the transmission, the heavy transmission is located at the rear, resulting in poor front-to-back weight balance, causing the aircraft to head up and reducing planting performance. Moreover, since it protrudes long from the front axle to the front end of the fuselage, the turning radius increases when moving around the edge of a ridge, resulting in problems such as poor work efficiency and obstructing the forward view of the fuselage.

The present invention was devised to solve the above-mentioned problems.The weight balance of the aircraft is improved, the aircraft heads-up can be reliably prevented, and the front part of the aircraft is short. The object of the present invention is to provide a transmission structure for a riding work machine that not only improves maneuverability but also widens the forward field of view and allows stable running operations at all times.

[Means to solve the problem]

The technical means taken by the present invention to solve the above problems is to mount an engine in the front of the aircraft, and transmit power from the engine to each part of the aircraft via a transmission installed above the front axle. The riding work machine is characterized in that the front end surface of the engine, the front end surface of the transmission, and the front end side of the front wheel attached to the front axle are located on substantially the same plane vertically, and It is characterized in that the upper surface is constructed at approximately the same height as the flat step surface of the fuselage, and the engine is disposed above the transmission.

[Action of the invention]

Therefore, according to the present invention, the weight of the engine and transmission, whose front end surfaces are located substantially on the same plane vertically, acts on the front part of the aircraft body to achieve a good front-rear weight balance and ensure that the aircraft heads up during work. to prevent. Moreover,
Since the engine and transmission do not protrude from the front end of the front wheels, the length from the front axle to the front end of the machine is shortened, which improves the ability to accompany the machine along the edge of a ridge, allowing for more efficient work.

In addition, if the top surface of the transmission is approximately the same height as the flat step surface of the aircraft, the center of gravity of the transmission will be lowered, improving the weight balance of the aircraft. Because it is lower, forward visibility is improved and stable driving operations can be performed at all times.

〔Example〕

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

1 is a running body of a riding rice transplanter illustrated as a riding working machine, and an engine 5 is mounted on the front part of a body frame 4 provided with left and right front wheels 2, 2 and rear wheels 3, 3. A driving operation section 1° having a steering wheel 7, a main shift lever 8, an auxiliary shift lever 9, etc. is provided behind the hood 6. 11 is a driver's seat. Further, a planting section 14 equipped with a seedling stand 12, a float 13, etc. is attached to the rear of the body via a link mechanism consisting of an upper link 15 and a lower link 16 so that it can be raised and lowered.

17 is a transmission that transmits the power from the engine 5 to various parts of the aircraft body, and the transmission 1
7 is located above the front axle 18 to which the front wheels 2, 2 are attached.

The transmission 17 includes a mission case 1.
A front input shaft 20 is disposed at the rear of the engine 9, and in front of the front input shaft 20, a main shaft 22 that is interlocked with the engine 5 via a belt 21 is disposed approximately directly below the engine 5. Main shaft 2 above
2, an intermediate shaft 23 equipped with a gear mechanism, a planting section drive shaft 24, and a reverse shaft 25 are arranged, and behind the front input shaft 20, a rear wheel drive shaft 26 is arranged.

The planting section drive shaft 24 and rear wheel drive shaft 26 are meshed with a planting PTO shaft 27 and a rear wheel PTO shaft 28, respectively. Then, by selective engagement by switching the transmission gear provided on the main shaft 22, power is transmitted to the front input shaft 20 via the intermediate shaft 23 to drive the front wheels 2, and at the same time, the rear wheel drive meshes with the front input J shaft 20. It is designed to drive a shaft 26. Further, the planting section drive shaft 24 and the backward movement shaft 25 are driven via the switching mechanism.

Reference numeral 29 denotes a steering shaft, which passes through the rear end of the transmission case 19 and is connected to a steering reduction section 30 provided at the bottom of the transmission case 19.
is activated, and the front wheels 2 are steered. 32 is a steering column. Further, the main shift lever 8 has a lower end side pivotally supported on the side of the steering column 32, and a connecting rod 33 extending forward and downward, with the tip end attached to the transmission case 1.
It is connected via an arm 36 to a rotation fulcrum 35 of a speed change shifter 34 provided on the rear end side of the transmission shifter 9 . 37 is a shift fork, and 38 is a transmission gear.

The upper surface 39 of the mission case 19 is formed in a substantially horizontal shape, and the engine 5 is fixed to a mounting frame 42 installed between the rear end side of the mission case 19 and the frame 41 of the bumper 40. The front end surface of the engine 5 disposed at the top, the front end surface of the transmission 17, and the front end sides of the front wheels 2, 2 mounted on the front axle 18 are located substantially on the top and bottom of the screen.

Further, the upper surface 39 of the transmission case 19 is arranged so as to be approximately at the same height as the flat step 43 of the aircraft body, so as to lower the center of gravity of the transmission 17 as much as possible.

Further, inside the mission case 19, a hydraulic pump 44 of a hydraulic mechanism is disposed using a space on the front side. Reference numeral 45 denotes an oil drain gutter for the engine 5, and the oil drain gutter 45 is provided with the oil draining direction directed toward the front of the aircraft body.

In the above configuration, power from the engine 5 is transmitted to the front wheels 2, rear wheels 3, planting section 14, etc. via the transmission 17, and planting work can be performed as the aircraft travels. Since the front end surfaces of the engine 5 and the transmission 17 and the front end sides of the front wheels 2 are vertically located on substantially the same plane, the weight of the engine 5 and the transmission 17 acts on the front of the aircraft, resulting in a good front-rear weight balance. be able to. Therefore, the planting work can be carried out smoothly without the machine body lifting its head up during the work. Moreover, since the engine 5 and transmission 17 do not protrude forward from the front axle 18, maneuverability at the edge of a ridge is improved, work can be done more efficiently, and the overall length of the aircraft is shortened, making it easier to transport the aircraft. It can be easily loaded onto a vehicle at any time.

Furthermore, the mission case 19, which is set at approximately the same height as the flat step 43, lowers the center of gravity and improves the weight balance of the aircraft, and furthermore, the position of the engine 5 disposed above the mission case 19 can be lowered. Therefore, the field of view from the driving operation unit 1o is widened, and stable driving operations can be performed at all times.

Further, the hydraulic pump 44 provided at the front end of the mission case 19 can effectively utilize the space inside the mission case 19, balance the weight of the mission case 19, and keep the hydraulic pump 44 close to the engine 5. Therefore, belt transmission from the engine 5 can be facilitated. On the other hand, when draining oil from the engine 5, the oil can be drained from the oil drain gutter 45 provided at the front of the aircraft to the nearest front of the aircraft on the outside of the aircraft, making it easy to perform oil draining operations. can.

〔Effect of the invention〕

In short, the present invention provides a riding working machine in which an engine is mounted on the front part of the machine body, and power from the engine is transmitted to various parts of the machine body via a transmission provided above the front axle. The front end surface of the transmission and the front end side of the front wheel attached to the front axle are positioned substantially at the top and bottom of the screen, and the top surface of the transmission is configured to be approximately at the same height as the flat step surface of the aircraft body. Since the engine is placed above the transmission, when carrying out work by transmitting power from the engine to each part of the aircraft, the engine and transmission, whose front end surfaces are located on the same vertical plane, are placed on the aircraft body. The weight acts on the front of the machine at the same time to improve the front-rear weight balance, making it possible to reliably prevent the machine from tipping up during work.

Moreover, since the engine and transmission do not protrude forward from the front end of the front wheels, the length from the front axle to the front of the machine is shortened, improving maneuverability in areas such as along ridges, allowing for more efficient work. .

In addition, the transmission has an upper surface that is approximately the same height as the flat step surface of the aircraft, which lowers the center of gravity, resulting in a better weight balance for the aircraft. Since the position of the front is also lower, forward visibility is improved,
This allows stable running work to be carried out at all times.

[Brief explanation of drawings]

The drawings show an embodiment of the transmission structure for a riding working machine according to the present invention, in which Fig. 1 is an overall side view of the riding working machine, Fig. 2 is an enlarged sectional view of the transmission, and Fig. 3 is an exploded view of the transmission. It is a side view showing a hydraulic machine. In the diagram, 2...Front wheel, 5...Engine, 17...Transmission, I8...Front axle, 4...
...It is a flat step. ■ ■

Claims (2)

[Claims] (1) In a riding work machine in which an engine is mounted at the front of the machine and power from the engine is transmitted to each part of the machine via a transmission installed above the front axle, the front end surface of the engine and the front end of the transmission 1. A transmission structure for a riding work machine, characterized in that a surface and a front end side of a front wheel attached to a front axle are located on substantially the same surface vertically. (2) In a riding work machine in which the engine is mounted at the front of the machine and the power from the engine is transmitted to each part of the machine via a transmission installed above the front axle, the upper surface of the transmission is placed on the flat surface of the machine. 1. A transmission structure for a riding work machine, characterized in that the transmission is constructed at substantially the same height as a step surface, and an engine is disposed above the transmission.