JP2003341420A - Lighting system for working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system for a traveling agricultural machine (working vehicle) capable of irradiating a machine body turning direction so as to make it easily visible by automatically horizontally and vertically rotating the directions of headlamps 2L and 2R based on the steering and the steering angle of a steering wheel 4. <P>SOLUTION: This lighting system for a working vehicle is so structured that the headlamps 2L and 2R are horizontally and vertically rotatably supported, and rotated in the machine body turning direction by gearing them with the steering angle in response to the steering of the steering wheel 4 in lighting the headlamps; and the irradiation thereof is automatically controlled downward. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device for a working vehicle that changes the irradiation direction of a headlight by steering a steering wheel.

[0002]

2. Description of the Related Art Conventionally, an illuminating device in which a headlight installed in the front part of a tractor is changed to a turning direction of a vehicle body based on a steering operation of a steering wheel is an actual lighting device.
A system as shown in Japanese Patent No. 3737 has already been proposed.

[0003]

In the illumination device having the structure disclosed in the above publication, the front wheel steering mechanism and the headlight are linked by a mechanical link structure so that the headlight only illuminates in a substantially horizontal direction. , It is difficult to see the ground surface especially in the lower part in front of the front wheels in the turning direction, and it is difficult to see the cultivated ground at the time of turning when adjoining the cultivated land that has been tilled until then. However, there is a problem that the work of releasing the interlocking between the headlight and the steering mechanism of the front wheels becomes complicated when the vehicle normally travels on the road without the irradiation control of the headlight.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the above-described conventional lighting device for a work vehicle. The irradiation directions of the headlights 2L and 2R are left and right and up and down. And the headlamps 2L and 2R are linked to the steering wheel steering accompanying the turning of the handle 4 when the headlights 2L and 2R are turned on, and the irradiation direction is automatically changed to the machine body turning direction and downward. It is characterized by being configured as follows.

Further, it is characterized in that the irradiation direction of the headlights 2L, 2R is controlled by the control releasing means 33 to cancel the left-right direction control or the vertical direction control, and the irradiation directions of the headlights 2L, 2R are fixedly held at the neutral position. I am trying.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a tractor shown as an example of a work vehicle, which includes left and right headlights 2L,
Equipped with 2R. In this tractor 1, an engine (not shown) is mounted on a front portion of a traveling machine body 1c having front and rear wheels 1a and 1b serving as steering wheels, covered with a bonnet 3, and a steering portion 4b including a handle 4 and a seat 4a and the like is provided at a rear portion thereof. And a working machine mounting portion 5 of a three-point link system for mounting a working machine such as a tilling device is provided at the rear part of the machine body. 4c, 4
Reference numeral d denotes a clutch pedal and a brake pedal arranged below the handle 4 on the left and right.

Further, the handle 4 is configured to steer the left and right front wheels 1a via the power steering mechanism 6 so as to be rotatable in the left and right directions about the vertical rotation shaft portion 7.
A steering angle sensor 8 for detecting the steering angle of the front wheels 1a is provided on the vertical rotation shaft portion 7, and the detection result is input to an irradiation control circuit shown in FIG. 7, which will be described later. The second headlamp 2L, 2R is moved to control the irradiation direction.

First, referring to FIGS. 3 to 6, the headlamp 2 is described.
The mounting structure and operating structure of L and 2R will be described.

The headlamps 2L and 2R have a light support frame 9 which is U-shaped in a side view and which is installed laterally in the front grill 3a in the front part of the bonnet 3, and an irradiation interval on the left and right sides of the light support frame 9. A light mounting frame 10 supported in a side view and having a U-shape in side view is provided so that the irradiation direction can be changed vertically and horizontally.

Further, in the light mounting frame 10, with the left and right headlamps 2L and 2R individually mounted, a vertical support shaft 19 projecting from the lower piece of the light mounting frame 10 can be rotated to the lower piece of the light support frame 9. Support.

The right and left light mounting frames 10 have connecting pins 20 projecting on the upper side thereof connected by a link rod 21, and link pins 22 projecting in the middle of the link rod 21 are mounted on the light supporting frame 9. The stepping operation type headlight left and right variable motor 23 is engaged with the operation rod 24.

With this configuration, the headlamp left / right variable motor 2
When 3 rotates in the normal and reverse directions, the left and right light mounting frames 10 are rotated in the left and right directions about the vertical support shafts 19 through the operating rods 24 and the link rods 21 to irradiate the headlamps 2L, 2R in the left and right directions. Can be changed.

Regarding the structure for changing the vertical irradiation, as shown in FIG. 5, when the link rod 16 provided on the rotary shaft of the headlamp vertical motor 15 is rotated upward and downward by a predetermined angle by a control signal, The light support frame 9 is tilted up and down via the connecting rod 17 connected to the.

A light mounting frame 10 is supported on the support frame 9 through a vertical support shaft 19. When the light supporting frame 9 is tilted as described above, the light mounting frame 10 also moves and the light supporting frame 10 is supported. Headlight 2 supported by the frame 10
L and 2R incline downward from the state of FIG. 5 to the state of FIG. 6 and illuminate the ground surface near the airframe.

Further, the tractor 1 is provided with a front wheel speed increasing switching mechanism (QT device) having a known structure, so that when turning, the front wheel 1a is speeded up from the rear wheel 1b so as to be driven for turning. The QT device includes left and right QT detection switches 35L and 35R that detect a steering angle of the front wheel 1a that is equal to or greater than a predetermined value.
(FIG. 7).

Next, the irradiation control circuit shown in FIG. 7 will be described. To the input side of the microcomputer 30 of this circuit, a night illumination switch 32 provided on a panel portion 31 formed on the rear surface of the hood 3 and a headlamp fixing switch 33 constituting a control releasing means are connected, and steering is performed. The angle sensor 8 and the QT detection switches 35L and 35R are connected.

Further, the headlight up / down variable motor 15 and the headlight left / right variable motor 23 are connected to the output side of the microcomputer 30, and the headlight is operated by judging the input, as shown in FIG. 2L and 2R lighting irradiation operation and direction control are performed.

Next, the use and control of the lighting device 2 will be described with reference to FIG.

First, in step S1, the night illumination switch 32
When the headlight fixing switch 33 is turned on in step S2 when the headlights 2L and 2R are turned on, the headlight up / down variable motor 15 and the headlight left / right variable motor 23 are stopped at the neutral position. Headlights 2L, 2
R is maintained in a normal road running posture so that the front side of the front of the machine body is irradiated.

When it is determined in step S2 that the headlight fixing switch 33 is in the OFF state, the steering angle sensor 8 detects the steering angle of the front wheel 1a accompanying the turning operation of the steering wheel 4 in step S4. It Next, in step S5, a change in the steering angle is determined by the steering angle sensor 8, and the front wheel 1a
When it is determined that the headlights have been rotated leftward or rightward, in step S6 the headlamp left / right variable motor 23 operates in proportion to the magnitude of the steering angle, and the headlamps 2L, 2R are turned. It rotates in the direction and irradiates the body turning direction side from the front side.

At the same time, in step S7, the headlamp up / down variable motor 15 is operated in proportion to the steering angle from the neutral position, and the headlamps 2L and 2R are rotated downward to rotate the vehicle body. The front lower portion of the front wheel 1a on the direction side is also easily visible and illuminated.

The tractor 1 having the illumination device 2 configured as described above has a headlamp 2L for normal road running or daytime field work in which the night illumination switch 32 and the headlamp fixing switch 33 are not turned on. , 2R is held in a “normal irradiation posture” that faces the front of the aircraft shown in FIGS. 3 and 5 and illuminates a distance to the appropriate aircraft, and when only the night illumination switch 32 is turned on in this state, the headlamp 2L, Since the 2R is turned on and illuminates the front side, normal road running can be performed under appropriate illumination.

When cultivating work or the like at night when it is dark, the night illumination switch 32 is turned on and the headlamp fixing switch 33 is turned off. When the steering wheel 4 is turned to steer the front wheels 1a in the turning direction, the headlights 2L and 2R are moved in the turning direction in proportion to the steering angle, and the left and right are centered on the vertical axis 19 by an appropriate amount. When the direction is changed (FIG. 4), the headlamps 2L and 2R accurately illuminate the ground surface near the fuselage on the turning direction side because the headlamps 2L and 2R are simultaneously rotated downward as shown in FIG. However, since the previously cultivated and already cultivated land portion is illuminated brightly, the airframe can be appropriately steered toward it.

Therefore, when the operator is working at night,
By simply operating the night illumination switch 32 and the headlamp fixing switch 33, by operating the handle 4, the headlamps 2L and 2R are automatically changed in the irradiation direction between the body turning direction and the downward direction. Therefore, the turning direction of the machine body and its ground side including the front wheels 1a can be illuminated brightly to facilitate the turning of the machine body.

Further, since the headlamps 2L and 2R can sequentially and widely illuminate the turning direction and the downward direction in proportion to the steering angle of the front wheel 1a by the operation of the steering wheel 4, the steering wheel 4 is operated to advance the traveling direction. The range required for visual confirmation can be confirmed well, and the maneuver can be smoothed to improve work efficiency.

Further, in the case of traveling on a normal road where the above-mentioned irradiation control is not required, by turning on the headlamp fixing switch 33 as the irradiation control circuit, the left-right direction control or the vertical direction control can be performed simultaneously or Either can be released, headlight 2
Since the L and 2R are fixedly held at the neutral position, it is possible to easily prevent the headlamps 2L and 2R from being operated unnecessarily.

In the present embodiment, the irradiation control circuit is released by turning on the headlamp fixing switch 33. However, the present invention is not limited to this, and the irradiation control is performed by means for automatically detecting a road running state. May be switched off. In this case, the road running detection means is
For example, it may be performed by detecting that the traveling speed is set to a high speed, that the work implement clutch of the tiller or the like is turned off, or that the QT device is off. It is a thing.

Further, the left and right direction control and the up and down direction control of the headlight are configured so that the turning of the vehicle body is performed by steering the front wheels more than a predetermined angle by using the QT detection switch. The control may not be performed by slightly modifying the direction of.

[0030]

As described above, according to the present invention, the irradiation direction of the headlights 2L, 2R can be changed between the left and right directions and the vertical direction, and the handle 4 is turned on when the headlights 2L, 2R are turned on. The irradiation direction of the steering wheel is automatically changed to the machine body turning direction and the downward direction in association with the steering wheel steering.

Accordingly, the irradiation directions of the headlights 2L and 2R are automatically changed to the left and right and the downward direction in accordance with the operation of the handle 4 so that the ground surface near the machine body on the machine body rotation direction side is surely secured. It is possible to irradiate the surface of the body to facilitate turning of the body.

Further, by releasing the left-right direction control or the up-down direction control of the irradiation direction of the headlights 2L, 2R by the control releasing means 33 and fixing and holding the irradiation direction of the headlights 2L, 2R at the neutral position, The headlights 2L and 2R can be fixedly held at a position where proper irradiation can be performed when traveling on a road where irradiation control is unnecessary.

[Brief description of drawings]

FIG. 1 is a plan view of a tractor including the lighting device of the present invention.

FIG. 2 is a plan view showing a state where the front wheels of FIG. 1 are steered to the left.

FIG. 3 is a plan view showing a front irradiation posture of a headlamp of the lighting device.

FIG. 4 is a plan view showing a rightward irradiation posture of a headlight of the illumination device.

FIG. 5 is a side view of FIG.

6 is a side view showing a state in which the headlight of FIG. 5 is illuminated downward.

FIG. 7 is a circuit diagram showing an irradiation control circuit of the lighting device.

FIG. 8 is an irradiation control system diagram.

[Explanation of symbols]

1 tractor 4 handle 2L, 2R
Headlight 6 Steering mechanism 9 Light support frame 10 Light mounting frame 15 Headlight vertical variable motor 19 Vertical support shaft 21 Link rod 23 Headlight left / right variable motor 33 Headlight fixed switch

Continued front page    (72) Inventor Shigeharu Kimura             Shimane Prefecture Higashi Izumo Higashi Izumo Odaiba 3054-11               Within Mitsubishi Agricultural Machinery Co., Ltd. F term (reference) 3K039 AA08 BA02 CC01 FD13 GA02                       JA03

Claims (2)

[Claims] 1. The headlamps 2L, 2R are configured so that the irradiation directions of the headlamps 2L, 2R can be changed between left and right and up and down.
An illuminating device for a working vehicle that automatically changes the irradiation direction to the machine body turning direction and downward by interlocking with the steering wheel steering accompanying the turning of the handle 4 when the R is turned on. 2. A control release means 33 releases the left-right direction control or the up-down direction control of the irradiation direction of the headlights 2L, 2R to fix and hold the irradiation direction of the headlights 2L, 2R at a neutral position. Illumination device for the work vehicle described.