JP2011067153A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle eliminating such a problem that things such as cut-off stems and leaves are left on the cutting blade to effect declining in the working vehicle's performance. <P>SOLUTION: The working vehicle includes: a cutting blade 10 for pinching use in the front of the vehicle body 1 to make a cutoff treatment of the tip of a crop under self-propelled motion; and a blowing means 27 at an appropriate position on the vehicle body to blow forced air onto the cutting blade 10 to exclude cut-off things. In the working vehicle, it is characterized that the blowing means enables pinching operation to be conducted while blowing air onto the whole surface of the cutting blade 10 from the rear of the cutting blade toward the front thereof and over the whole surface of the cutting blade. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a work vehicle capable of performing a cropping operation while self-propelled.

  2. Description of the Related Art Conventionally, a walking type pruning machine including a pinching means for pruning the uppermost end portion of a grown soybean stem is known from Patent Document 1, for example.

JP 2004-267018 A

  In the conventional configuration, the cut object remains on the cutting blade, and there is a problem that the cutting performance is deteriorated. The object of the present invention is to eliminate such problems.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the present invention according to claim 1 is equipped with a cutting blade (10) for pinching work that cuts the tip of a crop while self-propelled at the front portion of the vehicle body (1), and the pinching operation at a proper position on the vehicle body. A work vehicle is characterized in that a blower means (27) for blowing forced air on the cutting blade of the cutting blade (10) to remove the object to be cut is provided.

A clipper-type cutting blade (10) that reciprocates left and right with respect to the crop in the field while self-propelled acts to cut the tip of the crop.
Forced air from the blower (27) is constantly blown onto the cutting blade (10), and cut objects such as leaves and stems remaining on the cutting blade are blown away and eliminated.

  According to a second aspect of the present invention, the air blowing means can perform a pinching operation while blowing air over the entire surface of the cutting blade of the cutting blade (10) from the rear of the cutting blade to the front and over the entire surface of the cutting blade. The work vehicle according to claim 1, wherein the work vehicle is configured as follows.

  Forced wind is blown from the rear of the cutting blade (10) to the front while the tip of the crop is being pinched, and the whole cutting width of the cutting blade is blown, so that the object to be cut remains on the cutting blade. It will be eliminated ahead of the cutting blade.

  In short, according to the first aspect of the present invention, while performing a pinching operation on a crop, forced air is blown onto the cutting blade to eliminate the object to be cut, thus preventing the cutting object from remaining on the cutting blade. And the cutting performance can be kept high.

  According to the second aspect of the present invention, although the effect of the first aspect is achieved, the forced wind is blown from the rear of the cutting blade to the front and over the entire surface of the cutting blade, so that the removal action is easy. As a result, the residue could be eliminated without fail, the cutting performance was further improved, and the pinching work efficiency was greatly improved.

Side view of a work vehicle equipped with a cropping device Same as above Front view of main parts of work vehicle Side view of essential parts of another embodiment 1 is an enlarged side view of the main part of FIG. Top view of chemical tank and operation box Plan view of another embodiment of the work vehicle

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 show a passenger work vehicle equipped with a crop picking device such as soybean, and an engine E is mounted on the front portion of the vehicle body 1, and the rotational power of the engine E is used as a traveling mission case. 2, and the rotational power decelerated by the transmission is transmitted to the front wheels 3 and the rear wheels 4. A driver's seat 5 is provided in the center of the rear side of the fuselage, and a steering handle 6 is provided in front of it.

  On the front side of the vehicle body 1, an elevating link mechanism 9 that elevates and lowers while maintaining a substantially parallel posture with respect to the ground by an expansion and contraction operation of the elevating cylinder 8 is provided. The lifting / lowering link mechanism 9 is equipped with a clipper-type centripetal cutting blade 10 that cuts the tip of the crop so as to be driven by a hydraulic motor 11.

  The lifting link mechanism 9 includes a chemical spraying device 16 having a spray nozzle 13, a spray hose 14, a spray boom lance 15 and the like for spraying a chemical on crops in a field. The chemical solution in the chemical solution tank 18 mounted on the rear part of the machine body is ejected from the spray nozzle 13 through the spray hose 14 by a pump.

The elevating link mechanism 9 includes an upper link 9u, a lower link 9d, a front link (frame) 9f, and the like that move up and down with pivot axes Q1 and Q2 serving as fulcrums.
The chopping work cutting blade 10 includes a fixed receiving blade 10a and a movable cutting blade 10b that reciprocates left and right, and the movable cutting blade 10b is driven by a hydraulic motor 11 having an eccentric shaft. In this embodiment, the hydraulic hose 17 to the hydraulic motor 11 is configured in common so that the hydraulic hose 20 to the boom horizontal cylinder 19 can be replaced and used. According to this, it is not necessary to provide hydraulic piping such as a hydraulic gear pump or a hydraulic hose dedicated to the centering device, and a rational and low-cost configuration can be achieved.

  Further, by making the right and left trimming width of the cutting blade 10 wider than both sides of the machine body (left and right widths of the front and rear wheels), there is no leftover work for crops, and work efficiency is improved. In addition, the cutting blade surface of the cutting blade 10 is provided in a lateral direction substantially orthogonal to the moving direction of the machine body, so that the crop enters the cutting blade and the cutting accuracy is improved.

  The fixed receiving blade 10a of the cutting blade 10 is configured to be mounted and supported via the support stay 22 on the front side of the spreading boom lance 15, so that the support configuration of the cutting blade is simple and easy, and the number of parts is reduced. There is. If the supporting height of the cutting blade 10 is arranged at a position where the cutting edge of the cutting blade can be seen by an operator sitting on the driver's seat, the pinching position of the crop tip can be easily determined.

  In a cropping blade 10 for cropping work provided integrally with a spraying boom lance 15 having a spraying nozzle 13, a horizontal shaft 23 lying in the left-right direction is installed near the rear of the spraying boom lance 15, and a cutting blade for pinching work is provided. 10 and the spreading boom lance 15 are configured to be able to rotate integrally with the horizontal shaft 23 as a fulcrum. Thereby, the action angle with respect to the crop of the cutting blade 10 can be determined arbitrarily, and the cutting angle with the best cutting performance can be determined.

Further, the spray angle can be arbitrarily determined even during the spraying operation of the chemical solution, the chemical solution can enter the crop, and a better control effect can be obtained.
The angle adjustment of the cutting blade is configured so that it can be performed via the adjuster 25 that can be expanded and contracted by the turning operation of the adjustment handle 24 arranged above the cutting blade position. Further, the adjustment handle 24 and the adjuster 25 are arranged above the cutting blade position so that there is no interference with the crop during adjustment, and the handle operation can be easily performed.

  In addition, between the boom support frame 21 attached to the vertical frame (link) 9f and the spraying boom lance 15 connected and supported via the left and right connecting members 26 and 26 protruding forward from the frame 21, A horizontal shaft 23 that is a pivot point of the cutting blade 10 and the spray boom lance 15 is provided. The spray boom lance 15 and the boom support frame 21 are connected by a hydraulic cylinder instead of the adjuster 25, and the hydraulic cylinder is expanded and contracted by operation of a remote control switch provided near the driver's seat to remotely adjust the angle of the cutting blade. It can also be configured to be operable.

  Further, as shown in FIG. 3, a boom support frame 21 is mounted on a front frame 9f provided on the front surface of the lifting / lowering link mechanism 9 so as to freely roll left and right via a rolling shaft 40, and the boom support frame 21 and the front frame 9f are attached. It is connected by an automatic horizontal cylinder 41, and the rolling boom lance 15 and the pinching work cutting blade 10 are mounted on the rollable boom support frame 21. Since the boom support frame 21 maintains the horizontal state even when the machine body is tilted, the pinching position of the crop is accurately determined, and pinching can be surely performed at a predetermined position.

  As a modified example, if the slope (tilt) sensor 42 is provided on the upper surface of the boom support frame 21 or the spreading boom lance 15 excluding the cutting blade portion, the operator rolls the cutting blade each time the machine body tilts. Since it is not necessary to correct the angle, the operability is improved.

A blower (blower fan) 27 is installed as a blowing means at the rear portion of the chemical liquid tank 18, and is configured to rotate a turbine that generates blown air by driving the PTO shaft 31.
The forced air generated by the blower 27 is a vertical blower pipe 28 that is piped to blow toward the front of the machine body, and a horizontal blower that is piped in the horizontal direction on the rear side of the cutting blade 10 from the vertical blower pipe 28. The blade 29 is blown over the entire surface of the cutting blade through the air blowing pipe 29 and several air nozzles 30 which are opened to blow forward on the cutting blade 10 forward from the horizontal blowing tube 29. It is configured such that the pinching operation can be performed while blowing air from the rear toward the front of the cutting blade.

  By arranging the horizontal blast pipe 29 substantially parallel to the cutting blade 10, the blowing pressure blown to the upper surface of the cutting blade acts substantially evenly, and the debris removal action can be performed efficiently and accurately. In addition, by piping the horizontal air blow pipe 29 between the upper link 9u and the lower link 9d of the lift link mechanism 9, the lift link mechanism and the horizontal blow pipe are moved up and down in synchronization, and from the ground of the cutting blade. Even if the height is arbitrarily changed, the positional relationship between the cutting blade and the blowing nozzle remains unchanged, and the debris removal performance by blowing is stabilized.

By providing both the cutting blade 10 and the lateral blower pipe 29 on the boom support frame 21 that can be rolled, both of them operate in a state where an appropriate relationship position is maintained.
As a modification, as shown in FIG. 4, by providing the horizontal air duct 29 directly below the boom support frame 21, the support structure of the horizontal air duct is easy, and the space below the boom support frame can be effectively used. And can be arranged compactly.

  Furthermore, by arranging the air blowing nozzle 30 so that the forced air acts on the spray nozzle 13 as well, it is possible to prevent the crushed leaves and dust from adhering to the spray nozzle during the pinching operation, and to clean the spray nozzle. Can be maintained.

As shown in FIG. 5, it is desirable to adjust the cutting blade cutting angle θ within the range of the blowing path from the blowing nozzle 30, but the blowing angle is changed and adjusted simultaneously with the adjustment of the cutting blade angle. If so, the control controller 33 (see FIG. 6) installed near the chemical tank 18 (next to the driver's seat) can accurately perform the debris removal operation while maintaining an appropriate relationship. 36, a spray cock 37, a blower fan switch 34, an air volume adjusting lever 35 for adjusting the air volume, and the like are provided.

  In the configuration in which the cutting blade 10 is reciprocated by the hydraulic motor 11 and the blower 27 that blows forced air on the cutting blade, the electromagnetic clutch 32 of the blower 27 is interlocked with the ON operation of the hydraulic motor drive switch 38. If the air blow is started and the air blow is started, the forgetting operation of the air blow is forgotten, and a stable pinching operation without a cutting error can be performed. When the hydraulic motor drive switch 38 is turned off, the blower is also stopped by turning off the electromagnetic clutch at the same time.

  Moreover, if the driving speed of the cutting blade is changed in conjunction with the vehicle speed, the cutting accuracy can be stabilized. For example, the hydraulic motor rotation speed is increased or decreased by a microcomputer based on the vehicle speed detection result of the vehicle speed sensor 39. That is, as the vehicle speed increases, the rotational speed of the hydraulic motor increases to increase the cutting blade driving speed. Conversely, when the vehicle speed decreases, the hydraulic motor rotational speed decreases to decrease the cutting blade driving speed. Moreover, it can also comprise so that the drive speed of a cutting blade and the ventilation volume by an air blower may be adjusted automatically according to a vehicle speed (working speed).

  Furthermore, when turning in the field, the driving of the cutting blade is configured to be temporarily stopped, so that a safe operation can be performed by stopping the cutting blade in an area where the cutting operation is not performed. As such a control means, the turning angle of the steering wheel or the steering angle of the front wheels is detected, and when the turning is recognized by detection of a predetermined angle or more, the driving of the cutting blade is temporarily stopped. Automatic control. Of course, when the turning is finished and the normal working posture is returned, the driving of the cutting blade is automatically started.

The blower drive is turned on in conjunction with the cutting blade drive stop during turning and the cutting blade drive start operation after turning. It can also be configured to control the electromagnetic clutch 32 to be turned off.
When shifting control is performed at the traveling speed, even if the hydraulic motor drive switch 38 is turned on, the hydraulic motor 11 that drives the cutting blade is not operated, so that the vehicle can travel safely. It is possible to secure the surrounding safe environment. As a modified example of the above configuration, in a work vehicle equipped with an HST (hydraulic continuously variable transmission), safe traveling is possible even by adopting a configuration in which the hydraulic motor is not operated at a specified speed or higher. Moreover, energy consumption can be suppressed by setting it as the structure which does not drive a fan similarly.

  In the embodiment shown in FIG. 7, the difference from this example is that the cut leaves are blown away with forced air, and the forced air blowing direction from the blower nozzle 30 is set to the longitudinal direction (left and right lateral direction) of the cutting blade. It is in the point which has arranged the ventilation nozzle so that it may go along. That is, in the example of FIG. 7, as a configuration in which a blow nozzle 30 that blows air from the left end side to the right end side along the cutting blade 10 is provided at the front end (front end) of the vertical blow pipe 28 arranged on the left side of the vehicle. Yes. Therefore, according to this configuration, since only one blowing nozzle is needed, weight reduction and cost reduction can be achieved, and the cutting performance in the next process is not caused by the leaf debris not touching the front uncut crop. improves.

DESCRIPTION OF SYMBOLS 1 Body 10 Cutting blade 27 for pinching work Blower means (blower)
28 Vertical blower tube 29 Horizontal blower tube 30 Air blow nozzle

Claims (2)

  A cutting blade (10) for pinching work that cuts the tip of the crop while running on the front of the car body (1) is equipped, and the cutting blade of the pinching work cutting blade (10) is placed on the cutting blade of the pinching work (10) at an appropriate position on the car body. A work vehicle characterized by being provided with blower means (27) for blowing forced air to remove an object to be cut.   The air blowing means is configured to perform a pinching operation while blowing air over the entire surface of the cutting blade of the cutting blade (10) from the rear of the cutting blade toward the front and over the entire surface of the cutting blade. The work vehicle according to claim 1.

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