JP3692550B2 - Mobile agricultural machine controller - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a controller for a mobile agricultural machine. The present invention relates to a place where a controller equipped with electronic parts for automatic control used for each part of a mobile agricultural machine is installed.
[0002]
[Prior art]
Conventional controllers with interpolated electronic components for control include the upper part of the fender, which is the upper surface of the mud scattering above the fender wheels, the fender vertical wall side between the driver's seat and the left and right fenders, and other conventional examples. Many are attached to the seat side of the rear panel standing wall between the described seat and the rear panel. This is because automatic control switches, control levers and control petals are placed around the driver to adjust and operate the driver, and the wiring harness between the components and the controller is shortened. They are trying to speed up the control response or simply configure the wire harness.
[0003]
[Problems to be solved by the invention]
However, in mobile agricultural machines, the seat area is open upward, and tools and parts are dropped on the controller when other parts are attached or removed, and the wiring harness of the electrical equipment is detached or damaged. I was hurt. If the controller is placed around the upper part of the fender, around the transmission gear case in the engine room, or at the bottom of the floorboard, problems due to falling tools and parts can be eliminated, but the following problems remain.
[0004]
First of all, with the arrangement inside the fender, the dirt and water resistance of the controller and wire harness take-out part deteriorates due to the muddy soil that rolls up the wheels and the water in the scraping operation, and the outer diameter of the wheel when the auxiliary wheel is installed is increased. Then, even if the auxiliary wheel does not contact the fender, the box-shaped controller protrudes into the fender and breaks. Therefore, it is necessary to change parts such as protruding a part of the fender upward.
[0005]
Next, in the arrangement in the engine room, the temperature of the electronic component rises due to the hot air of the engine, and the durability deteriorates. Even in the arrangement around the transmission gear case, if the operation is continued in the same manner, the temperature of the oil for lubrication rises, so the temperature of the electronic components rises due to the hot air and the durability deteriorates.
[0006]
[Means for Solving the Problems]
The present invention is intended to solve such problems of the conventional apparatus, and has taken the following technical means. That is, a seat (4) is provided between the standing wall surfaces (3, 3) of the fenders (2, 2) located inside the rear wheels (1, 1), and a floor plate (5) is provided below the seat (4). ) To connect the vertical wall surfaces (3, 3) of the fenders (2, 2) with the floor plate (5) , and the rear panel (up and down direction) from the rear of the floor plate (5) to the back of the seat (4) ( 6) and a horizontal upper frame (7) is provided above the rear surface of the rear panel (6), and electronic components for control are installed under the upper frame (7) via a mounting bracket (24). The controller (8) was attached to the rear panel (6), and a cover of the upper frame (7) was attached to a cover (25) that covers the back of the controller (8).
[0007]
【Example】
The illustrated example is an agricultural tractor 9, and horizontal control of the rotary tiller 10 attached to the rear of the agricultural tractor 9, and autobrake turning control that brakes and turns the rear wheel 1 on one side that is a turning inner wheel. In addition, the attachment position of the controller 8 such as the automatic shift control of the traveling speed is attached to the rear surface of the rear panel 6 behind the seat 4.
[0008]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. This is just an illustrative example. The agricultural tractor 9 is a four-wheeled vehicle in which a pair of front and rear wheels 11 and 1 are provided on the front and rear of the aircraft, and the steering wheel 12 is steered left and right to change the advancing direction of the front wheels 11 and 11 to adjust the turning direction. Do.
[0009]
An engine 13 is placed above the front wheels 11, and the bonnet 14 covers the left, right, front and upper sides of the engine 13, and the instrument panel 15 and the rear cover 16 cover the rear. A main frame 17 is composed of a clutch housing connected to the rear portion of the engine 13 and a transmission gear case in which a transmission gear is housed. A hydraulic cylinder case 18 is integrally attached to the upper rear end of the main frame 17 via a fastener such as a bolt or a nut.
[0010]
Rear axle cases 19 and 19 protrude from the transmission gear case which is the main frame 17 on both the left and right sides, and the rear wheels 1 and 1 are attached to the left and right ends so as to be freely driven and rotated. In addition, the lower end portions of the columns 20 and 20 having a rectangular section are integrally attached to the middle portion of the rear axle case 19 via fasteners, and the upper ends of the columns 20 and 20 are also formed in a similar rectangular shape. The upper frame 7 is connected left and right.
[0011]
A floor plate 5 is provided above the hydraulic cylinder case 18 between the left and right rear wheels 1 and 1 with a certain space opened, and a seat 4 is provided on the floor plate 5. A fender 2 is disposed from the upper side of the rear wheel 1 to the front side and the side of the inner surface side, and the left and right ends of the floor plate 5 are respectively connected to the upright wall surfaces 3 and 3 inside the fenders 2 and 2. Is attached.
[0012]
As shown in FIG. 1, the seat 4 comprises a substantially horizontal seating surface 4a and a substantially vertical backrest surface 4b. The rear panel extends upward from the rear end of the floor plate 5 in the direction of the backrest surface 4b. 6 is provided as an upper cover 21 that extends rearward beyond the upper frame 7. Although not shown, the left and right ends of the rear panel 6 are attached to the standing wall surfaces 3 and 3 of the fenders 2 and 2, and the left and right fenders 2 and 2, the floor plate 5, and the rear panel 6 form a corner-like strength retaining shape. Yes.
[0013]
The front end portion of the floor board 5 descends downward from the vicinity of the front edge of the seat 4 and continues to the floor 22 which is a substantially horizontal foothold that is one step lower. Brake petals 23 and 23 for independently braking the left and right rear wheels 1 and 1 are provided at the front portion of the floor 22. When one of the petals 23 is stepped on, the corresponding rear wheel 1 is braked and both brakes are applied. If the petals 23 and 23 are stepped on simultaneously, the left and right rear wheels 1 and 1 are braked.
[0014]
Left and right struts 20, 20 spacing narrower than upright wall surface 3,3 spacing fenders 2, 2, this gap between the unit and the upper frame 7 for connecting the upper between pillars 20 and 20, and interior electronic components for control A controller 8 which is a box is arranged. Reference numeral 24 denotes a mounting bracket that attaches the controller 8 to the rear panel 6. A cover 25 is attached to the back of the controller 8 to protect the back and bottom of the controller 8. Reference numeral 26 denotes a wire harness, which includes various sensors for knowing the operation of automatic control operation switches, operation levers, operation petals, and the like arranged around the driver, and sensors for the arrangement parts provided in each part of the machine and the controller 8. A bundle of electric cords to be connected, which can be attached to and detached from the outlet 27 type, or is waterproofed with a sealing material to form an integrated wiring.
[0015]
3 and 4 show a conventional configuration, the rear panel 6a is bulged rearward, and a controller 8a is attached to the bulged portion 6b from the front seat 4c side. In this case, there is a possibility that the controller 8a and the wire harness 26a may be damaged by falling objects. The rotary tiller 10 suspended from the rear portion of the agricultural tractor 9 is attached to a three-point link including a top link 28 at the upper center in the rear view and lower links 29 and 29 at the lower left and right sides. The lift rods 31, 31 that interlock and connect the lift arms 30 having the pistons inside can be moved up and down.
[0016]
32 is a universal joint, and the driving force of the PTO shaft 33 projecting rearward from the transmission gear case 17a at the rear end portion is finally applied to a plurality of tilling claws 34, 34. . . To excavate the mud surface. FIG. 5 is a plan view of the transmission gear case 17a at the rear end. The driving force from the engine 13 reaches the power drive shaft 35 through various transmission gears. A two-stage gear 36 is attached to the power drive shaft 35. When the shifter 37 is operated forward and backward to engage the shifter gear 38 with the high-speed gear 36a of the two-stage gear 36, the shifter gear 38 rotates and an engagement tool such as a spline (FIG. (Not shown), the shifter gear shaft 39 is driven to rotate, and the PTO shaft 33 decelerated directly from the shifter gear shaft 39 or as illustrated is rotated.
[0017]
Reference numeral 40 denotes a speed change lever which shifts the shaft rotation of the PTO up and down. The arm 42 swings back and forth around the shaft 41 and moves the shifter 37 back and forth. A position sensor 43 senses the neutral position of the shifter 37 and informs the controller 8, which is a CPU, whether the PTO shaft 33 rotates or stops. The position sensor 43 is screwed from the outside of the side wall of the transmission gear case 17a, is easy to operate when exposed to the internal lubricating oil, and is more effective in terms of mudproofing and waterproofing than a switch mounted outside the machine body. Yes.
[0018]
The electric and hydraulic control circuit diagram shown in FIG. 6 will be described. In this control, when the steering wheel 12 is operated to the left or right, the rotation angle and the operation amount are detected by the steering angle sensor 58 and transmitted to the controller 8 which is a CPU. 44 is a hydraulic pump, 45 is a diversion valve, and 46 is an electric three-chamber switching valve. A piston 47 is provided in the hydraulic cylinder case 18 and moves the lift arm 30 up and down. 57 is a switching valve, which determines whether the pressure oil 45a passed through the flow dividing valve 45 is switched to the piston 47 side or switched to the three-chamber switching valve 46 side.
[0019]
48 is a brake arm, and when the brake petal 23 is stepped on, the brake arm 48 is moved via the actuator 49 to brake the brake 50 of the rear wheel 1. 51 is a plunger, and 52 is a brake cylinder. When pressure oil flows through the brake oil passage 53, the plunger 51 extends to press the brake arm 48 toward the braking side.
[0020]
Reference numeral 54 denotes a lift oil passage, which lifts and lowers the rotary tiller 10 and a work machine that is separately attached and detached, and can be manually operated by an automatic control circuit of FIG. 6 and another manual lever (not shown). 55 is a tank and 56 is an aperture. Although not shown, the brake oil passage 53 for automatically braking the rear wheels 1 and 1 is naturally provided independently on the left and right.
[0021]
The operation will be explained. When the CPU detects a turning angle of the handle 12 above a certain level, the three-chamber switching valve 46 is switched to flow pressure oil into the left or right brake oil passage 53 to brake the rear wheel 1 on the turning inner wheel side. Make a small turn. This is automatic brake control. Before this automatic autobrake control is applied, pressure oil is allowed to flow through the lift oil passage 54, and the work implement is lifted from the ground and then braked to prevent damage to the work implement.
[0022]
When the neutral of the position sensor 43 is detected, this neutrality is transmitted to the CPU, and the operation of the switching valve 57 and the three-chamber switching valve 46 is stopped. The automatic operation of wheel braking is checked, and manual priority operations can be performed for safety.
[0023]
[Effects of the invention]
As described above, the present invention provides the control controller (8) below the upper frame (7) and behind the rear panel (6), and the controller (8) is attached to the rear panel (6) with the mounting bracket (24 ) And the rear side is covered with a cover (25) attached to the upper frame (7). Therefore, it is excellent in waterproofness and heat resistance, and the controller (8) can be easily removed by removing the cover (25). Can be removed and maintainability is improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an essential part.
FIG. 2 is an overall side view of the present invention.
FIG. 3 is a perspective view of a main part of a conventional example.
FIG. 4 is a side sectional view of a conventional example.
FIG. 5 is an explanatory plan line view of another main part.
FIG. 6 is an explanatory diagram of another main part and the whole.
[Explanation of symbols]
1 Rear wheel 2 Fender 3 Standing wall surface 4 Seat 5 Floor board 6 Rear panel 7 Upper frame 8 Controller

Claims (1)

A seat (4) is provided between the standing wall surfaces (3, 3) of the fender (2, 2) located inside the rear wheel (1, 1), and a floor plate (5) is provided below the seat (4). The floor panel (5) is provided to connect the vertical wall surfaces (3, 3) of the fender (2, 2), and the rear panel (6) in the vertical direction extends from the rear part of the floor board (5) to the back of the seat (4). And an upper frame (7) in the horizontal direction above the rear surface of the rear panel (6), and a controller (in which control electronic components are installed via a mounting bracket (24) below the upper frame (7) ( 8) A controller for a mobile agricultural machine, in which the rear panel (6) is attached and a cover (25) covering the back of the controller (8) is attached to the upper frame (7).

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