JPH0640552Y2 - Offset type tractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an offset type tractor, and more specifically, to an intermediate working machine, an operating device for operating the working machine, a hydraulic drive unit for operating the working machine, The present invention relates to an offset tractor including a sensor for detecting the state of the working machine, a controller for controlling the working machine, a harness for connecting each of the above-mentioned parts, or hydraulic piping, and further having a boarding / alighting section for getting on and off the operator.

(B) Conventional technology Generally, a tractor is equipped with various working machines in front of, in the middle of, or behind the machine body, and is used for operating the work machine or operating the machine body near the cockpit. Each operation device such as an operating lever is provided, and a hydraulic drive unit for operating the working machine is provided inside and outside the side portion of the machine body. Each sensor for detecting the state is arranged, and further, a controller for processing the output signals from the respective operation devices and the respective sensors and controlling the working machine and the like is arranged in the vicinity of the cockpit, and The above-mentioned parts are connected to each other by a harness or hydraulic piping, and an operator is allowed to board from the boarding / alighting parts on the left and right sides of the machine and sit on the cockpit to perform various operations. .

(C) Problems to be Solved by the Invention In the tractor described above, the parts such as the above-described operating devices are arbitrarily arranged on the left and right sides of the machine body, and correspondingly, the harnesses are connected to each other. Since the electrical system such as etc. and the hydraulic system such as hydraulic piping were also arranged on the left and right sides of the machine body, the protruding parts of these parts, electrical system and hydraulic piping etc. narrowed the left and right getting on and off parts, and the operator Not only do they hinder the passengers getting on and off, but they could be damaged. In addition, since the operating devices are arranged disjointly, the operability is poor, and further, because the electrical system and the hydraulic system are disseminated over the left and right sides of the machine body, maintenance is extremely difficult to perform. there were.

(D) Means for Solving the Problems The present invention is intended to solve the above problems, and, for example, as shown with reference to FIGS. 1 and 2, the center of the front wheel and the rear wheel. In the offset type tractor, the cockpit is arranged at a position that is offset to the left and right from the center of the machine body that connects the machine, and an intermediate work machine is attached to the machine body at the intermediate portion of the front wheels and the rear wheels. An operation device for operating the operation of the intermediate work machine, a hydraulic drive unit for operating the intermediate work machine, a sensor for detecting an operation state of the intermediate work machine, and output signals from the operation device and the sensor. A controller for processing and controlling the working machine, and a harness or hydraulic piping for connecting the above-mentioned parts to each other. You The offset tractor is characterized in that it is centrally arranged on one of the left and right sides of the machine body on the opposite side to the control side, and the boarding / alighting section for the cockpit is provided on the other side of the machine body.

(E) Operation Based on the above configuration, when boarding a tractor that is in a stopped state, the operator does not have to touch the parts such as the operating device, harnesses, and hydraulic piping from the opening / closing part that is wide open on the other side of the machine. It is possible to reach the cockpit smoothly, and when traveling and operating the work equipment after getting on and off, it is extremely easy and efficient to perform these operations with the operating devices etc. obtain. Further, in the case of repair or regular maintenance in case of failure of the electrical system or the hydraulic system, it is possible to quickly and accurately carry out the repair or the like while checking the related operation or the like of each part on one side of the machine body.

(F) Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the offset type tractor 1 according to the present embodiment has a bonnet portion 3 accommodating an engine and the like mounted on its body 2 between front wheels 5a, 5b and rear wheels 6a, 6b. The front wheels 5a, 5b are arranged eccentrically to the left in the lateral direction, for example, to the left in the forward direction, and are eccentrically arranged to the right to eccentrically move the driver's seat 7 from the respective centers, as shown in FIG. An intermediate work machine 9 for performing intermediate management work such as weeding is provided at an intermediate portion between the rear wheels 6a and 6b and the machine body 2 as well.
A rear working machine 10 for erasing, for example, wheel marks of a tractor attached to a field is provided behind the machine.

A steering handle 11 is provided in front of the cockpit 7 and a panel portion 12 is provided. The panel portion 12 is provided with a speedometer, various other meters, an indicator lamp, etc. On the left side of the cockpit 7, there are a main transmission lever 13, an auxiliary transmission lever 15 and the like at the front part thereof, and a rear position control lever 16 for raising and lowering the rear working machine 10 at an intermediate part thereof, Further, a mid-position control lever 17 for raising and lowering the intermediate work machine 9 and a height setting volume 19 for the intermediate work machine 9 are provided at the rear of the lever 1, respectively.
At the center of rotation of the levers 6 and 17, setting devices 20 and 21 such as potentiometers, which output elevation position setting signals corresponding to the rotational positions of the levers 16 and 17, are provided. Also, a priority valve is provided outside the vicinity of the lever 17 above.
22 is provided, and the valve 22 is connected to the airframe 2 via a hydraulic pipe 23.
A lift arm 30 that is connected to an electromagnetic switching valve 27 for operating a hydraulic cylinder 26 that is swingably supported about a fulcrum 25 on the left side of the lift arm 30 that rotates about a fulcrum 29 when the hydraulic cylinder 26 expands and contracts. The intermediate work machine 9 is mounted via a crank-shaped arm 33 that rotates around a rod 31 and a fulcrum 32.
Is designed to be moved up and down. Further, a hydraulic block 35 is arranged below the priority valve 22, and a solenoid valve and a hydraulic cylinder (both not shown) built in the hydraulic block 35 are operated to rotate around a fulcrum 36. The rear working machine 10 is vertically moved via a three-point link mechanism 42 including a moving lift arm 37, a lift rod 39, a lower link 40 and a top link 41. Then, in relation to the lift arms 30 and 37, a work position sensor 43 for the intermediate work machine 9 and a work position sensor 45 for the rear work machine 10 such as a potentiometer are provided.
The sensors 43 and 45, the setters 20 and 21, the electromagnetic switching valve 27 and the like are respectively provided via the harness 46 to the cockpit 7
It is adapted to be connected to a controller 47 arranged in the vicinity of the left side of the controller 47 such as a microcomputer. In this way, the operating devices 13, 15, 16, 17, 20, 20, the hydraulic drive units 22, 26, 27, the sensors 43, 45, the controller 47, the electrical connection harness 46, and the hydraulic piping 23 are all the fuselage. It is configured to be arranged on the left side of 2 in a concentrated manner.

Further, as clearly shown in FIG. 2, the right side portion of the machine body 2 is configured so that there are no levers, hydraulic drive units, harnesses, pipes, etc. as described above, and as a result, the cockpit 7 is The right front part of the floor 49 provided has a large open structure, and a step 50 is attached to the part to configure an operator's boarding / alighting part 51.

The working position sensor 43 for the intermediate working machine 9 arranged in association with the lift arm 30 is provided inside the bonnet portion 3 as shown in the enlarged view of FIG. Fuel tank 52 Mounting bracket 53 Space 60 surrounded by engine 56, crank housing 57 and panel body 59 inside sensor mounting bracket 55 fixed to the bottom
A lift arm 30 (shown in FIG. 1) is rotatably mounted inside a sensor plate 43a forming a part of the sensor 43, and the sensor 43 is rotated about a fulcrum 29 by expansion and contraction of the hydraulic cylinder 26. The link mechanism 62 is fixed to the plate member 30a forming a part of the reference member via a pin 61. And, by arranging the sensor 43 as described above, waterproof and mudproof measures against the sensor 43 are ensured, the durability of the sensor 43 is improved, and smooth operation of the sensor 43 over a long period of time is achieved. You can In addition, in the lower left part of the body 2 of the tractor 1, the first
As shown in the figure, a work light 63 is provided so that the operator can visually recognize the operating status of the intermediate work machine 9 at the lower right part of the machine body 2 from the cockpit 7 when working at night. 63 is a fulcrum at the bottom of the fuselage 2, as shown in FIG.
Mounting plate 66 mounted so that it can swing around 65
It is installed at the front end of the mounting plate 66 so that it can be adjusted vertically and horizontally, and at the rear end of the mounting plate 66, a tension spring 67 is mounted so as to rotate the mounting plate 66 in one direction, for example, counterclockwise. ,
The direction of the work light 63 is changed by operating the operating rod 69, which is provided in the vicinity of the panel portion 12 in front of the cockpit 7, and which is capable of multistage positioning, and swinging the mounting plate 66 via the Bowden wire 70. I'm supposed to get it. And the above work light
By configuring 63 to be remotely controllable, it is possible to eliminate the trouble and the attendant danger that an operator has to repeatedly get on and off to change the direction of the work light 63, especially in a large sized or high tractor. it can.

Since the present embodiment is configured as described above, step 50 in the right side entry / exit section 51 of the tractor 1 in a state where traveling is stopped and the intermediate work machine 9 and the rear work machine 10 are respectively raised.
After the operator sits on the cockpit 7 using the, the tractor 1 starts to run, and the levers 16 and 17 arranged close to the left side of the cockpit 7 to start the work are operated in the descending direction. Then, a signal corresponding to the lowered position of the lever 16 is output from the setter 21 to the controller 47,
A descending command output from 47 through the harness 46 excites the descending solenoid of the electromagnetic switching valve 27 to extend the hydraulic cylinder 26, and the lift arm 30, the rod
The intermediate work implement 9 is lowered through the arm 31 and the arm 33.
Then, the intermediate work machine 9 descends by a predetermined amount and the position sensor 43
When it is determined by the controller 47 that the detection signal from the above coincides with the setting signal from the setting device 21, the lowering operation of the intermediate work machine 9 is stopped. Similarly, the rear working machine 10 is lowered to a predetermined position by a signal from the setting device 20 corresponding to the lowered setting position by the lever 17, and then stopped.
In addition, the intermediate work machine 9 and the rear work machine 10 in the lowered state
Is similarly raised to the set position.

(G) Effect of the Invention As described above, according to the present invention, the cockpit (7) is located at a position offset to the left and right from the center of the airframe connecting the centers of the front wheels (5) and the rear wheels (6). Arranged and equipped with an intermediate working machine (9) on the body of the intermediate portion of the front wheel and the rear wheel,
In an offset type tractor, an operating device (17) for operating the operation of the intermediate work machine, a hydraulic drive unit (26) for operating the intermediate work machine, and an operating state of the intermediate work machine are detected. (43) and a controller (47) for processing the output signals from the operating device and the sensor to control the working machine, and a harness (46) or hydraulic piping (23), Since the respective parts and the harnesses or the hydraulic pipes connecting them to each other are centrally arranged on one of the left and right sides of the aircraft on the side opposite to the side where the cockpit (7) is located, maintenance or the like is performed only on the one side. Therefore, it can be carried out extremely easily, quickly and accurately. Further, since the boarding / alighting section (51) is provided on the other side of the machine body (2), it is extremely easy for the operator to get on and off the tractor (1) from the other side of the machine body (2). And it can be done completely.

Then, the operating device (17) related to the intermediate work machine (9), the hydraulic drive unit (26), the sensor (43), the controller (47) and the harness (46) or hydraulic pipe (23) connecting these.
Are concentrated on the opposite side of the cockpit (7), the visibility from the cockpit (7) to the working machine (9) and the like is improved,
This improves the workability of the intermediate work machine (9).

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of a riding mobile agricultural machine according to the present invention, FIG. 2 is an overall plan view thereof, FIG. 3 is a partially enlarged side view showing a specific example of sensor attachment, and FIG. FIG. 6 is a partially enlarged plan view showing a specific example of mounting a work light. 1 ... Offset type tractor, 2 ... Airframe, 9 ... Intermediate work machine, 10 ... Rear work machine operation device, 13 ... Main speed change lever operation device, 15 ... Sub speed change lever operation device, 16 ... Rear Position control lever operating device, 17 ... Operating device (mid position control lever operating device),
20,21 …… Setter operation device, 22 …… Priority valve hydraulic drive, 26 …… Hydraulic cylinder hydraulic drive, 27 ……
Solenoid switching valve hydraulic drive, 23 ... Hydraulic piping hydraulic drive, 4
3,45 …… Work position sensor, 47 …… Controller, 51 ……
Boarding area.

Claims (1)

[Scope of utility model registration request] From the center of the airframe connecting the center of the front wheels and the rear wheels,
In an offset type tractor, in which an operator's seat is arranged at a position deviated to the left and right sides and an intermediate working machine is mounted on a machine body at an intermediate portion of the front wheel and the rear wheel, in order to operate the operation of the intermediate work machine. Operating device, a hydraulic drive unit for operating the intermediate working machine, a sensor for detecting an operating state of the intermediate working machine, and an output signal from the operating device and the sensor for processing the working machine. A controller for controlling, and a harness or hydraulic piping for connecting the above-mentioned parts to each other, and the harness or hydraulic piping for connecting the above-mentioned parts and those to each other are provided on the side opposite to the side where the cockpit is located. An offset-type tractor, which is centrally arranged on one of the left and right sides of the machine body and is provided on the other side of the machine body for boarding / alighting passengers for the cockpit.