JP2004161270A - Working vehicle light system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle light system allowing attaching of working lamps regardless of the presence of a cabin and without impairing design and functioning as an auxiliary light for right and left to light the working lamps by turning an operation handle or a front wheel, thus enhancing safety and high workability at night operation to reduce burdens of workers due to much attention. <P>SOLUTION: In this working vehicle light system 20 equipped with headlamps 18 for illuminating frontward at the front of a vehicle body and working lamps 19L, 19R illuminating front side, the working lamps 19L, 19R are connected with a running operation tool or a working operation tool to detect a working state. The working lamps are structured so as to turn on interlocking with the rotation of an operation handle 13 or the front wheel 3. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a structure of a light for illuminating a front area of a body of a work vehicle such as a tractor.
More specifically, the present invention relates to a structure of a work light that is turned on in response to operation of a steering handle.

2. Description of the Related Art Conventionally, a working vehicle such as a tractor is provided with a headlight for traveling at a front portion of an airframe, for example, a front portion such as a hood, a bumper, or a fender for traveling at night. Some tractors of the cabin specification are provided with a work light in the upper front part of the cabin as required for nighttime work or the like.
Also, during night driving, the headlights are also illuminated by the headlights in the turning direction of the vehicle, so that the headlights are linked so that the irradiation direction coincides with the turning direction of the vehicle so that the vehicle can travel safely. Some are also available (for example, see Patent Documents 1 to 3).
In addition, a technique in which a light for straight ahead and an auxiliary light for irradiating the side are provided at the front of the body is also known (for example, Patent Document 4).

Japanese Utility Model Publication No. 49-83737 Japanese Utility Model Publication No. 52-7182 Japanese Utility Model Publication No. 52-66179 JP-A-10-109588

However, the conventional working lamp has to be retrofitted to a tractor or the like that does not have a cabin specification, and the working efficiency and the design appearance are not good.
Further, in an airframe that does not have a work light, such as an airframe of a safety frame specification, only a headlight that is integrally fixed to the airframe illuminates the front during traveling or the like. Is installed, the work light only illuminates the front of the aircraft from above the cabin, so when turning the aircraft, it is difficult to distinguish between the work area and the unworked area, and the angle of view of the worker However, there is a possibility that problems in safety and work may occur.
In addition, in the case of the technique of rotating the headlamp via a link or the like in accordance with the steering operation of the wheel as described above, there is an advantage that the front of the body in the direction to be changed direction is irradiated, The front of the fuselage was no longer illuminated, and it was not in a state where the operator's view angle could be completely secured.
In addition, the technology of turning on the auxiliary light in the direction in which the aircraft is about to turn is necessary when traveling at high speeds.However, it is not so necessary for vehicles such as work vehicles that travel at low speeds, and only when working. Sometimes you need it. In addition, in tilling work or the like using an agricultural tractor, work may be performed while looking at the boundary between uncultivated land and cultivated land. In this case, it may be desired to irradiate the side even when traveling straight. In addition, when traveling between ridges, it may be desired to work while irradiating both sides.
Therefore, in the present invention, a work light can be provided regardless of the presence or absence of a cabin and without deteriorating the design, the number of parts can be reduced, the assembly process can be simplified and cost can be reduced, and the work light can be operated. The lighting is turned on in response to the steering operation of the steering wheel, or the left and right working lights are turned on as necessary, contributing to the improvement of safety and working surface during night driving, and Provided is a work vehicle light that can reduce a burden caused by the attention of the worker.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the present invention, in a work vehicle light provided with a headlight illuminating the front of the body and a work light illuminating the vicinity of the front wheels, a state in which the headlight and the work light can be simultaneously turned on, A state in which the work light is turned on in conjunction with the turning of the steering wheel or the front wheel while the light is turned on can be made to appear.

  According to a second aspect of the present invention, a turning-side work lamp is turned on in conjunction with the turning of the steering wheel or the front wheel.

  The present invention has the following effects.

  In claim 1, when the headlight and the work light are set to be turned on at the same time, it is possible to always work with the headlight and the work light when working at night. Therefore, the vehicle can be lit and work even when traveling straight ahead, and safe and accurate driving is possible. In addition, when the working light is set to be turned on when the steering wheel or the front wheel is turned while the headlight is turned on, the vicinity of the front wheel can be illuminated according to the steering operation. And it is possible to easily distinguish between arable land and uncultivated land, detect obstacles, and the like, and more secure and accurate operation becomes possible.

  According to the second aspect, when the machine body is turned, the work lamp is automatically switched without switching, and the workability can be improved. In addition, the power consumption of the battery can be suppressed because the work light on the opposite side to the steering direction is not turned on, and energy saving can be achieved. Further, when there is a worker other than the driver, a function of giving a direction to the worker can be provided.

Next, an embodiment of the invention will be described.
1 is an overall side view of a tractor as one embodiment of a work vehicle according to the present invention, FIG. 2 is a plan sectional view of a light portion, FIG. 3 is a partial front sectional view of a front wheel support portion, and FIG. FIG. 5 is a front perspective view of a tractor provided with a light according to the present invention, FIG. 6 is a control circuit diagram of a second embodiment, FIG. 7 is a control circuit diagram of a third embodiment, FIG. FIG. 9 is a control circuit diagram of a fourth embodiment.

First, the overall configuration of a tractor 1 according to the present invention will be described with reference to FIG.
The tractor 1 has a vehicle body frame 21 provided at a front end of a vehicle body, and front wheels 3.3 are supported on a front lower portion of the vehicle body frame 21 via a front axle case 10 (shown in FIG. 3). The rear wheels 4 are supported by a transmission case 9 fixedly mounted on a rear axle case.
An engine 5 is mounted on a front portion of the body frame 21, and a radiator 6 and a battery 7 are arranged in front of the engine 5. The engine 5, the radiator 6, the battery 7, and the like disposed in the engine room are covered with a bonnet 16, and a light 20 is disposed in front of the bonnet 16.

A transmission case 9 is fastened and fixed to a rear portion of the body frame 21 via a clutch housing or the like, and the engine 5 and the transmission case 9 are connected via a power transmission mechanism such as a clutch, a transmission shaft or a universal joint. ing.
The operating unit 2 is disposed behind the hood 16, and the operating unit 2 is covered by the cabin 12. The driving unit 2 has a dashboard 8 disposed at the rear of the hood 16, a steering handle 13 protruding rearward and upward from the dashboard 8, and a headlight switch described later on the side or rear surface of the dashboard 8. 32, a key switch, etc. are arranged, a brake pedal is arranged on the right side below the dashboard 8, and a clutch pedal is arranged on the left side. An accelerator lever, a forward / reverse switching lever, and the like are disposed near the steering handle 13, a seat 14 is disposed behind the steering handle 13, and a main shift lever, a sub shift lever 43, A PTO shift lever 44, a position lever, and the like are arranged.

Next, the light 20 according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1, 2, and 5, the lights 20 are disposed on the left and right of the upper portion of the front grill 17 at the front end of the hood 16, and the lights 20 are formed in the hood 16 above the front grill 17. Placed in space. A lens 25 disposed on the front outer side of the light 20 is made of a transparent synthetic resin or glass in a substantially U shape in plan view, and a pair of left and right headlight reflectors 22L is provided on the front side inside the lens 25. The work light reflectors 50L and 50R are fixed to the side surface inside the lens 25. The headlamp reflectors 22L and 22R are formed in a substantially hemispherical shape, and the headlamp bulbs 23L and 23R are arranged at substantially the center bottoms to illuminate the front, thereby forming the headlamp 18. Work light bulbs 24L and 24R are arranged substantially at the center of the work light reflectors 50L and 50R, and work lights 19L and 19R are formed so as to illuminate the sides. That is, the headlamp 18 is arranged on the front, and the working lights 19L and 19R are arranged on both left and right sides thereof, and these are covered with the left and right integrated lens 25.
That is, as shown in FIG. 5, a headlight 18 is provided above a central portion in front of the hood 16 and four work lights 19L and 19R are integrally disposed on both left and right sides of the headlight 18.

In the related art, the work light is attached to a tractor of a cabin specification or retrofitted, so that it is difficult to see the vicinity of the front wheels 3.3 and sideways at night or the like. However, by configuring as described above, the headlight bulbs 23L and 23R and the work light bulbs 24L and 24R are integrally formed in the light 20. That is, the headlight 18 and the work lights 19L and 19R are integrally formed. It was possible to illuminate the vicinity and the side of the front wheels 3, 3 without losing the appearance, so that nighttime work could be facilitated. As compared with the case where a work lamp is added in a different configuration, the design is better, the number of parts can be reduced, and the assembling process can be simplified and the cost can be improved.
The arrangement positions and the number of the work light bulbs 24L and 24R are positions illuminated in the vicinity of the front wheels 3 and 3 and are not limited to this embodiment as long as they do not impair the design appearance. is not.

Next, lighting control of the light 20 will be described.
In the lighting circuit of the first embodiment, as shown in FIG. 4, a headlight switch 32 is connected to the battery 7, and a work switch 33 and a headlight 18 are connected to the headlight switch 32 in parallel. When the headlight switch 32 is turned on, the headlight 18 is turned on, and when the work switch 33 is turned on, the work lights 19L and 19R can be turned on. Work lights 19L and 19R are connected in parallel to the work switch 33 via left and right limit switches 35L and 35R as detection means. Thus, the work lights 19L and 19R are turned on only when the headlight switch 32 and the work switch 33 are turned on and the limit switches 35L and 35R are turned on.

  The headlight switch 32 is disposed on the driving unit 2 as described above, and is disposed on the dashboard 8 near the steering handle 13 in this embodiment. The work switch 33 and the headlight switch 32 can be separately arranged, and the headlight switch 32 is turned on at the first stage by a rotary switch or the like, and the work switch 33 is turned at the second stage. Can be integrally configured so as to be turned on.

Further, the work switch 33 can be linked with a traveling operation tool or a work operation tool. In other words, when linked with the traveling operation tool, a work composed of a switch or a sensor is provided at the high speed shift position of the rotation base of the auxiliary speed change lever 43 (FIG. 1) or at the high speed position of the speed change gear in the transmission case 9. When the switch 33 is arranged and the sub-transmission lever 43 is shifted to the high-speed position by shifting the speed, the work switch 33 is turned off because the operation is not being performed, and the work lights 19L and 19R are not turned on. Since the work is being performed, the work switch 33 is turned ON so that the work lights 19L and 19R can be turned on.
In the case of interlocking with the work operating tool, the work switch 33 constituted by a switch or a sensor is set at the neutral position of the rotation base of the PTO shift lever 44 or the neutral position of the gear of the PTO shift device in the transmission case 9. When the PTO shift lever 44 is located in the neutral position, the work switch 33 is turned off because it is not during work, and when it is not in the neutral position, the work switch 33 is turned on and the work switch 33 is turned on and the work light 19L. 19R can be turned on.

  The limit switches 35L and 35R are configured to be turned on when the left-right angle of the steering wheel 13 or the front wheel 3 is turned by a predetermined angle or more. This specific configuration will be described. However, since the limit switches 35L and 35R are symmetrically disposed on the left and right sides of the front axle case 10 and have substantially the same configuration on the left and right, only one side (left side) will be described with reference to FIG.

  A transmission case 28 is fixedly provided on both left and right sides of the front axle case 10, and a steering rotation case 29 is rotatably attached so as to cover the transmission case 28. A king pin 26 is rotatably supported in the steering rotation case 29 via a bearing or the like. An axle 31 is rotatably supported by the steering rotation case 29 via bearings or the like, and the front wheel 3 is fixed to the axle 31 by bolts or the like.

  The steering turning case 29 is connected to a knuckle arm (not shown), and is connected to the steering handle 13 (shown in FIG. 1) via a link or the like from the knuckle arm, or is connected to the power steering cylinder. Then, the front wheel 3 can be turned left and right by turning the steering handle 13.

  A fixed member 40 is fixedly mounted on the upper part of the transmission case 28, and a rotating shaft 36 is rotatably inserted into the fixed member 40 at a position above the king pin 26. An arm 38 and a cam 37L are fixed to the upper part of the rotating shaft 36. The arm 38 is formed in an inverted L-shape when viewed from the front, and the other end is fixed to the steering rotation case 29. Thus, the cam 37L is configured to rotate with the front wheel 3 via the arm 38. A limit switch 35L is fixed to the transmission case 28 or the front axle case 10 so as to face the cam 37L. The limit switch 35L and the cam 37L are covered by a cover 34, and are protected from rainwater, mud, etc., so that malfunction does not occur.

As shown in FIG. 4, the cam 37L has a large-diameter portion and a small-diameter portion centered on the rotating shaft 36, and is disposed so that the contact point of the limit switch 35L abuts on the outer periphery of the cam 37L. Therefore, the cam 37L is configured to rotate around the rotation shaft 36, so that the limit switch 35L is turned off when it is in contact with the small diameter portion and is turned on when it is in contact with the large diameter portion. ing.
With such a configuration, when the steering handle 13 is rotated, the steering rotation case 29 is rotated via the knuckle arm, and the cam 37L is rotated via the arm 38. When the cam 37L rotates by a predetermined angle or more by this rotation, the limit switch 35L comes into contact with the large-diameter portion to be turned on, and the work lamp 19L is turned on.
By adjusting the size and shape of the cam 37L, the position where the limit switch 35L is disposed, and the like, it is possible to adjust the set angle at which the steering handle 13 is turned to turn on the work light 19L. .

  Further, the configuration for turning on the work lamp 19L (or 19R) when the steering handle 13 is turned by more than the set angle is not limited to the above configuration, and the limit switch 35 and the cam 37 are provided inside the transmission case 28. It is also possible to arrange such that the arm 38 directly turns ON / OFF the limit switch 35. Further, a sensor such as a potentiometer or a rotary encoder can be used as a means for detecting the left-right rotation angle of the steering wheel 13 or the front wheel 3.

  With the above configuration, when performing nighttime work, turning on the headlight switch 32 turns on the headlight 18, and further turns on the work switch 33 or interlocks with the operation tool. When the operating tool is shifted to the working side, for example, when the auxiliary shift lever 43 is shifted to the low speed side, the work switch 33 is turned on, and when the steering handle 13 is rotated by the set rotation or more during the work traveling, the limit switch is turned on. 35 is turned on, the working light 19L (or 19R) on the rotating side is turned on, and it is possible to irradiate the vicinity of the front wheel 3 on the turning side of the fuselage. Safe driving becomes possible.

Next, a second embodiment for controlling the lighting of the work lamps 19L and 19R will be described with reference to FIG.
In the case of this embodiment, when the steering handle 13 is turned by a set angle or more, the left and right working lights 19L and 19R are turned on. That is, the cam 37 is provided on one of the left and right sides of the transmission case 28, or is fixed to a handle shaft that supports the steering handle 13, and the cam 37 cuts off a part of the outer periphery of the disk in a substantially half-moon shape. The limit switch 35 is arranged to face the cam. The limit switch 35 is connected in series with the work switch 33, and further connected in parallel with the work lights 19L and 19R.

  In this way, at the time of night work, the headlight 18 is turned on by turning on the headlight switch 32, and furthermore, when the work switch 33 is turned on or linked with the operation tool, the operation tool is operated. When the gear is shifted to the side, the contact point of the limit switch 35 is OFF without contacting the outer periphery of the cam 37 in the straight traveling position. When the steering handle 13 is rotated by the set rotation or more from the straight traveling position, the contact point of the limit switch 35 contacts the outer periphery of the cam 37 to be turned ON, and the left and right working lights 19L and 19R are turned on. During this turning, the headlights 18 and the work lights 19L and 19R are turned on, so that the surroundings of the turning machine body can be illuminated, and the situation at the edge of the field can be understood, and the surroundings can be easily determined when turning back. In addition, since the cam 37 and the limit switch 35 are provided only on one of the left and right sides or only on the handle shaft, the number of parts can be reduced and cost can be reduced. In the case where the cam 37 is provided in the transmission case 28, since the rotation angle when turning left and right is different, the cam shape or the fixed position must be changed as appropriate.

Next, a third embodiment for controlling the lighting of the work lamps 19L and 19R will be described with reference to FIG.
In the case of this embodiment, the configuration of the first embodiment, the configuration of the second embodiment, and manual operation can be selected. A selection switch 39a is connected to the headlight switch 32, and the selection is performed. The first terminal on the selected side of the switch 39a is connected to the working lights 19L and 19R via the contacts 52L and 52R of the sensor 52 instead of the limit switch 35, respectively. The sensor 52 is constituted by a potentiometer or the like, and is turned on when the sensor 52 is turned by a predetermined angle or more.
Thus, when the steering wheel 13 is turned and the front wheel 3 is turned by a predetermined angle or more, the turning-side work lamp 19L or 19R is turned on.

A second terminal on the selected side of the selection switch 39a is connected to the working lights 19L and 19R via a contact 52a of a sensor 52 instead of the limit switch 35. The left and right working lights 19L and 19R are connected via a contact 39b, and the contact 39b is turned on when the selection switch 39a is connected to the second terminal. The contact 52a is turned on when the sensor 52 is rotated by a set angle in both the left and right directions.
Thus, when the steering handle 13 is rotated by the set angle or more, the contact 52a is turned on, and the work light 19L and the work light 19R are simultaneously turned on via the contact 39b.

The third terminal on the selected side of the selection switch 39a is connected to the working lights 19L and 19R via manual switches 51L and 51R instead of the limit switch 35, respectively.
In this manner, the headlight switch 32 is turned on, the selection switch 39a is connected to the third terminal, and the manual switch 51L or 51R is turned on only when necessary, so that the work light 19L 19R or both can be turned on.
In this case, it can be turned on at all times during night work, can be turned on manually only during turning, or can be turned on as needed even during straight running for confirmation.

Next, a fourth embodiment for controlling the lighting of the work lamps 19L and 19R will be described with reference to FIG.
In this case, one of the work lamps is always turned on during nighttime work, and limit switches 35L and 35R and a latching relay (keep relay) 54 are connected to the work switch 33 of the first embodiment. Although the limit switches 35L and 35R can be turned on by the cam 37 as described above, an example will be described in which the limit switches are turned on by depressing the left and right brake pedals 53L or 53R. Note that a sensor can be used instead of the limit switch. The limit switches 35L and 35R and the contact 54a of the latching relay 54 are connected in parallel, and the working lights 19L and 19R are connected to the other two terminals on the other side of the contact 54a.

  In such a configuration, when the work switch 33 is turned on and the brake pedal 53L on one of the left and right sides (for example, the left side) is depressed for turning, the limit switch 35L is turned on and the latching relay 54 is activated. Then, the contact 54a is switched to turn on the work lamp 19L and turn left while the left side is turned on. Then, a straight-ahead work is performed while the left work light 19L is turned on, and when reaching the edge of the field, since the unworked side is on the right side, the right brake pedal 53R is depressed and the vehicle turns right. At this time, the limit switch 35R is turned on. Then, the latching relay 54 is operated to switch its contact 54a to turn off the left work light 19L and turn on the right work light 19R. If the work light 19 on the desired side is not turned on, the work light 19 can be turned on by depressing the brake pedal 53 on that side.

With the configuration as described above, for example, when performing night tilling work with a rotary tilling device, perform the tilling work by steering while illuminating the cultivated land side with the target of the boundary portion between the cultivated land and the uncultivated land, and at the field edge. Depress the brake pedal on the uncultivated land and turn to the uncultivated land. At this time, the work light is switched to the uncultivated land side to irradiate the light, and then the vehicle travels while illuminating the cultivated land side during the straight traveling work. Therefore, when turning on the headland, the work light is automatically switched without switching the irradiation, and the workability can be improved.
However, the limit switch 35 can be linked to the rotation of the steering wheel. In addition, a switching element such as a transistor can be used as the switch or relay. Further, a configuration in which these are controlled by software using a microcomputer or the like can also be adopted. Further, the work lights can be arranged on the left and right sides of the hood, the body frame and the bumper. Further, the configuration of the fourth embodiment can be further configured to be selectable by the selection switch of the third embodiment.

1 is an overall side view of a tractor that is an embodiment of a work vehicle according to the present invention. FIG. FIG. 3 is a partial front sectional view of a front wheel support portion. FIG. 4 is a control circuit diagram of the first embodiment. 1 is a front perspective view of a tractor provided with a light according to the present invention. FIG. 9 is a control circuit diagram of the second embodiment. FIG. 10 is a control circuit diagram of the third embodiment. FIG. 14 is a control circuit diagram of a fourth embodiment.

Explanation of reference numerals

3 Front wheel 13 Steering handle 18 Headlight 19L / 19R Work light 20 Light 32 Headlight switch 33 Work switch 35L / 35R Limit switch 43 Secondary gearshift lever 44 PTO gearshift lever 52 Sensor

Claims (2)

  In a work vehicle light equipped with a headlight illuminating the front and a work light illuminating the vicinity of the front wheels at the front of the fuselage, operating the headlight in a state where the headlight and the work light can be turned on at the same time, and with the headlight turned on A work vehicle light configured to be able to show a state in which the work lamp is turned on in conjunction with rotation of a steering wheel or a front wheel.   The work vehicle light according to claim 1, wherein a work light on a turning side is turned on in conjunction with rotation of the steering handle or the front wheel.

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