JPH03200423A - Transmission structure of manned operating machine - Google Patents

Abstract

PURPOSE:To attempt to prevent head-up of a machine body by way of improving weight balance of the front and the back of the machine body by arranging a transmission on the front part side of the machine body and a front axle and a steering shaft at the rear side part of the transmission. CONSTITUTION:A running machine body of a sulky operating machine has an engine 5 mounted on the front part of a machine body frame 4 arranged respectively with a pair of left and right front wheels 2 and a pair of rear wheels 3. And motive power from the engine 5 is devised to be respectively transmitted to a running part and an operating part 14 including the front and rear wheels 2, 3 through a transmission in a mission case 18. In this case, the transmission 18 uses a space below the engine 5 and arranged at the front part of the machine body frame 4. Subsequently, a front axle 21 supporting the front wheel 2 and a steering shaft 22 arranged to stand on a driver's operating part 10 are respectively arranged at the rear part side of the transmission 18.

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]

Conventionally, riding working machines such as rice transplanters have an engine mounted on the front of the machine, a transmission installed on the lower side of the machine, and either a steering section for steering operation or a transmission mounted on the front of the machine. Ta.

[Problems to be solved by the present invention]

However, in the case where the steering section is provided at the front of the transmission, the heavy transmission is located behind the steering section, which impairs the front-to-back weight balance of the machine, causing the machine to head up and reducing planting performance. Furthermore, since the overall length of the machine body becomes long, the turning radius increases when moving around a ridge or the like, resulting in poor work efficiency, and when transporting the machine body, there are problems such as making it difficult to load it onto a vehicle.

The present invention has been devised in view of the above-mentioned circumstances, and it is possible to improve the weight balance of the machine body, reliably prevent the machine from lifting its head up during work, and furthermore, shorten the overall length of the machine body and improve its maneuverability. The purpose of the present invention is to provide a transmission structure for a riding work machine that can improve work efficiency and improve work efficiency, and that can be easily loaded onto a vehicle when transporting the machine.

[Means to solve the problem]

In order to solve the above-mentioned problems, the technical measures taken by the present invention provide the above-mentioned riding work machine in which power from an engine mounted in the front part of the machine body is transmitted to a traveling part and a working part via a transmission. It is characterized in that the transmission is disposed on the front side of the fuselage, and a front axle and a steering shaft are provided on the rear side of the transmission.

[Action of the invention]

Therefore, according to the present invention, the transmission disposed on the front side of the aircraft body improves the front-rear weight balance and reliably prevents the aircraft from heading up. Since the transmission has a front axle and a steering shaft on its rear side, it is possible to shorten the overall length of the aircraft by positioning the transmission in the space below the engine mounted on the aircraft. Therefore, it is possible to improve the maneuverability at the edge of a ridge, thereby increasing the efficiency of work, and when transporting the machine body, it can be easily loaded onto a vehicle.

〔Example〕

Embodiments of the present invention will be described in detail based on drawings of a riding rice transplanter exemplified as a riding working machine. ■ is a traveling aircraft, and the aircraft frame 4 is equipped with left and right front wheels 2, 2 and rear wheels 3, 3.
An engine 5 is mounted on the front part of the engine 5, and behind a bonnet 6 that covers the engine 5, there is a driving operation unit 10 having a steering wheel 7, a main shift lever 8, an auxiliary shift lever 9, etc.
is provided. 11 is a driver's seat. Further, at the rear of the body, a planting section 14 including a seedling stand 12, a flow [3, etc.] is attached via a link mechanism consisting of an upper link 15 and a lower link 16 so that it can be raised and lowered.

Reference numeral 17 denotes a transmission for transmitting power from the engine 5 to the traveling section and the working section, and the transmission 17 is disposed at the front side of the aircraft by utilizing the space below the engine 5 mounted on the aircraft. . That is, the transmission case 18 of the transmission 17 has an approximately planar upper surface, and a distal end protrudes below the engine 5.

The engine 5 has a rear end attached and fixed to a mission case 18, and a front end attached to a bumper 19 provided at the front of the aircraft body.
It is attached and fixed to the frame 20 of.

Further, a front axle 21 supporting the front wheels 2 is disposed at the rear side of the transmission 17, and the front axle 21 supporting the front wheels 2 is disposed on the rear side of the transmission 17. The transmission 17 and the front end surfaces of the front wheels 2 are vertically substantially straight. The lower end side of the steering shaft 22 erected in the driving operation part 10 passes through the rear end of the transmission case 18 and is connected to the steering gear reduction part 23 provided at the bottom of the transmission case 18. The case 18 also serves as a steering gear box. Reference numeral 24 denotes a pitman arm that is linked to the steering gear reduction section 23, and when the steering wheel 7 connected to the upper end of the steering shaft 22 is operated, the pitman arm 24 is actuated to steer the front wheels 2. ing. 2
5 is a steering column.

The transmission 17 includes a mission case 1.
A front input shaft 26 is disposed at the rear of the input shaft 8 , and a main shaft 28 interlocked with the engine 5 via a belt 27 is disposed in front of the front input shaft 26 at a position substantially directly below the engine 5 . Main shaft 2 above
8, an intermediate shaft 29 equipped with a gear mechanism, a planting section drive shaft 30, and a reverse shaft 31 are arranged, and behind the front input shaft 26, a rear wheel drive shaft 32 is arranged.

The planting section drive shaft 30 and rear wheel drive shaft 32 are meshed with a planting PTO shaft 33 and a rear wheel PTO shaft 34, respectively. Through selective engagement by switching the transmission gear provided on the main shaft 28, power is transmitted to the front input shaft 26 via the intermediate shaft 29 to drive the front wheels 2, and at the same time, the rear wheel drive shaft 32 meshes with the front human power shaft 26. It is designed to drive. Further, the planting section drive shaft 30 and the backward movement shaft 31 are driven via the switching mechanism. 35 is a hydraulic pump linked to the engine 5, and 36 is a rear axle.

In the above configuration, power from the engine 5 is transmitted to the front wheels 2, rear wheels 3, and planting section 14 via the transmission 17, and planting work can be performed as the aircraft travels. Since the transmission 17 is disposed on the front side of the machine body, the weight of the transmission 17 acts on the front of the driving operation section IO. Therefore, the front and rear weight balance of the machine body is good, and even if the planting section 14 is provided at the rear of the machine body, the machine body can be reliably prevented from head-up and work can be carried out smoothly.

Moreover, the front axle 21 is the transmission 1
Since the lower end of the steering shaft 22 passes through the rear end of the transmission case 18, the transmission 17 can be disposed in the space below the engine 5 to shorten the overall length of the aircraft. can. Therefore, the traveling radius of the machine body becomes smaller, and when traveling around a ridge or the like, the area where planting is not possible becomes narrower, and the planting performance can be improved.

Furthermore, when transporting the aircraft, the overall length of the aircraft is short, so it can be easily loaded onto a vehicle.

〔Effect of the invention〕

In short, the present invention transmits power from an engine mounted at the front of the aircraft body to a traveling section and a working section via a transmission. In such a riding work machine, the above-mentioned transmission is disposed at the front side of the machine body, and the front axle and steering shaft are provided at the rear side of the transmission. Since it is located at the front, the weight balance between the front and rear is good, allowing the machine to perform operations smoothly without causing head-up.

Furthermore, since the front axle and steering shaft are provided on the rear side of the transmission, the transmission can be placed in the space below the engine mounted on the aircraft.

As a result, the overall length of the aircraft is shortened, improving its ability to accompany the aircraft along the edge of a ridge, improving work efficiency, and when transporting the aircraft, it can be easily loaded onto a vehicle.

[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 a plan view of the same, and Fig. 3 is an enlarged view of the transmission. FIG. In the figure, 5...engine, 17...transmission, 21...front axle, 22...steering shaft. 16

Claims (1)

[Claims] In a riding work machine that transmits power from an engine mounted at the front of the machine body to the traveling section and the working section via a transmission, the above-mentioned transmission is arranged at the front side of the machine body, and the transmission is arranged at the rear side of the machine body. A transmission structure for a riding work machine characterized by having a front axle and a steering shaft.