JP2019187367A - Work vehicle - Google Patents

Abstract

To provide a work vehicle which reduces receiving disturbance of a GPS receiving device, and in which workability and safety are taken into consideration.SOLUTION: A work vehicle provided with a front wheel (4) and a rear wheel (5) of a traveling vehicle body (2), a receiving antenna (121) acquiring location information, and an antenna frame (122) supporting the receiving antenna (121) is configured such that: the receiving antenna (121) is positioned at a machine body front side relative to and above the front wheel (4); and the receiving antenna (121) is provided with a receiving antenna support plate (121a) positioned at the machine body front side relative to an operation part (30) for operating a machine body, and supporting the receiving antenna (121) at the machine body front side of the antenna frame (122).SELECTED DRAWING: Figure 4

Description

  The present invention relates to a work vehicle such as a seedling transplanting machine in which a planting device for planting seedlings in a field is connected to the rear part of a vehicle body, and belongs to the technical field of agricultural machinery.

  As a seedling transplanter as an example of a conventional work vehicle, a farm vehicle equipped with an automatic steering device is described in Japanese Patent Application Laid-Open No. 2016-42857 in order to easily perform a straight traveling operation of a farm vehicle that performs farm work in a field. Has been.

  This farm vehicle is equipped with a GPS receiver so that it can recognize the traveling direction of the vehicle body and is steered by an automatic control device so that it goes straight.

JP 2016-42857 A JP, 2006-007198, A

  In order to more accurately recognize the position of the aircraft in the field, by providing a frame that attaches the GPS receiver to a high position, reception failures can be prevented to a minimum and accuracy is improved.

  However, this frame does not consider reducing the accuracy of the GPS receiver due to vibration of the airframe.

  For this reason, since the position of the machine body is not accurately recognized, for example, there is a problem that an agricultural vehicle having an automatic straight traveling function proceeds in an unintended direction.

  In addition, there is a problem that the antenna frame and the GPS receiving device hinder the worker and the workability is lowered and the visibility during driving is lowered.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the conventional work vehicle, and an object of the present invention is to provide a work vehicle in which the reception trouble of the GPS receiver is reduced and workability is also taken into consideration.

  In order to solve the above problems, the invention of claim 1 includes a front wheel (4), a rear wheel (5) of a traveling vehicle body (2), a receiving antenna (121) for acquiring position information, and the receiving antenna ( 121) In the work vehicle provided with the antenna frame (122) supporting 121), the reception antenna (121) is located on the front side of the machine body and above the front wheel (4).

  According to a second aspect of the present invention, the receiving antenna (121) is positioned on the front side of the aircraft from the operation unit (30) for operating the aircraft, and supports the receiving antenna (121) on the front side of the antenna frame (122). The work vehicle according to claim 1, further comprising a receiving antenna support plate (121a).

  According to a third aspect of the present invention, in the work vehicle according to the first or second aspect, the antenna support plate (121a) is provided with a hole (121b) toward the front rear side of the machine body.

  According to a fourth aspect of the present invention, a front cover (31) that is openable and closable provided in the operation section (30) and a plurality of front struts (117) that support the antenna frame (122) on the front side of the body are provided on the left and right sides. The cover (31) is positioned between the front struts (117) in an open state, and the antenna frame (121) is fixed to the airframe in front of the airframe from the operation unit (30). The work vehicle according to any one of claims 1 to 3.

  According to the first aspect of the present invention, the receiving antenna (121) is located above the front wheel (4) on the front side of the body, and the left and right rolling vibrations of the body due to the unevenness of the farm scene are applied to the receiving antenna (121). The shaking can be suppressed, and the deterioration of the accuracy of the receiving antenna (121) is prevented.

  In addition, since the receiving antenna (121) does not interfere with the work, it is possible to prevent a decrease in workability.

  Further, according to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the receiving antenna (121) does not interfere with the work, so that the workability can be prevented from being lowered.

  In addition, since the receiving antenna (121) does not disturb the driving operation and the field of view, it is possible to prevent a decrease in operability and safety.

  According to the third aspect of the present invention, in addition to the effect of the first or second aspect of the invention, the antenna support plate (121a) is provided with a hole (121b) toward the front rear of the machine body. Thus, it is possible to prevent the antenna support plate (121a) from lowering the visibility.

  Further, since the antenna support plate (121a) does not disturb the field of view, it is possible to prevent a reduction in safety.

  Further, according to the present invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the antenna frame (121) is located on the front side of the aircraft from the operation unit (30). Since it is fixed to the airframe, it does not interfere with work, driving operation, and visibility, so that workability and safety can be improved.

1 is a side view of a work vehicle according to an embodiment of the present invention. It is a front view of the work vehicle shown in FIG. It is a side view of an antenna frame. It is a side view of the work vehicle of another embodiment. It is a front view of the work vehicle of another embodiment.

  The rice planting machine 1 includes a traveling vehicle body 2 on which an operator can board. The traveling vehicle body 2 has a pair of left and right front wheels 4 and a pair of left and right rear wheels 5, and is a four-wheel drive vehicle in which each wheel is driven during traveling. Thereby, the traveling vehicle body 2 can travel on a farm field or a road. In addition, a seedling planting unit 50 that can be moved up and down by a seedling planting unit lifting mechanism 40 is disposed at the rear of the traveling vehicle body 2 as a working device that performs work in a farm field.

  The traveling vehicle body 2 includes a main frame 7 disposed substantially at the center of the vehicle body, an engine 10 mounted on the main frame 7, and power for transmitting the power of the engine 10 to the drive wheels and the seedling planting unit 50. And a transmission device 15. The engine 10 and the power transmission device 15 constitute a traveling device 8 that is a device for traveling on a farm field or a road. Further, in this work vehicle according to the present embodiment, the power generated by the engine 10 that is a power source is not only used for moving the traveling vehicle body 2 forward and backward, but also for driving the seedling planting unit 50. Heat engines such as diesel engines and gasoline engines are used.

  Further, the engine 10 is arranged at a substantially center in the left-right direction of the traveling vehicle body 2 and in a state of protruding upward from a floor step 26 on which an operator puts his / her foot when getting on. Further, the floor step 26 is provided between the front portion of the traveling vehicle body 2 and the rear portion of the engine 10 and is mounted on the main frame 7. The mud can be dropped on the field. A rear step 27 that also serves as a fender for the rear wheel 5 is provided behind the floor step 26. The rear step 27 has an inclined surface that is inclined upward as it goes rearward, and is disposed on each of the left and right sides of the engine 10. A boarding sensor 14 is provided below the floor step 26 and the rear step 27 to detect that an operator is on board due to an increase in weight.

  The engine 10 protrudes upward from the floor step 26 and the rear step 27, and an engine cover 11 that covers the engine 10 is disposed in a portion protruding from these steps. That is, the engine cover 11 covers the engine 10 in a state of protruding upward from the floor step 26 and the rear step 27.

  Further, the traveling vehicle body 2 is provided with a control seat 28 on which an operator is seated at the upper part of the engine cover 11, and in front of the control seat 28 and at the front center of the traveling vehicle body 2 is a control unit. 30 is disposed. The control unit 30 is disposed in a state of protruding upward from the floor surface of the floor step 26, and divides the front side of the handle floor step 26 into left and right.

  A front cover 31 that can be opened and closed is provided at the front of the control unit 30. Further, an operation lever and the like for operating the operation device, instruments, a handle 32, and an automatic steering switch 13 (not shown) are disposed on the upper portion of the control unit 30. The handle 32 is provided as a steering member for steering the traveling vehicle body 2 by an operator steering the front wheel 4, and the front wheel 4 can be steered via an operation device or the like in the control unit 30. It is possible. In addition, as the operation lever, a shift lever 35 that is a shift operation member that switches between forward and backward travel of the traveling vehicle body 2 and a traveling output, and a sub traveling operation that switches the traveling speed of the traveling vehicle body 2 to a speed corresponding to the traveling place. Sub-transmission levers 38, which are members, are disposed on the right and left sides of the machine body.

  The control unit 30 includes a lower cover 33 into which the mounting claws 33b are inserted into the floor step 26 and an upper cover 34 that covers the upper portion. By assembling, the appearance of the connecting part is improved.

  In addition, on the portions of the floor step 26 located on the left and right sides of the control unit 30, a spare seedling stage 65 on which a replenishment seedling is placed is arranged. The preliminary seedling stage 65 is rotatably supported by a support shaft (vertical shaft) protruding from the floor surface of the floor step 26, and is rotated by a worker's hand or a rotating member such as an electric motor. Is possible.

  The power transmission device 15 includes a hydraulic continuously variable transmission 16 that is a transmission for shifting the driving force transmitted from the engine 10, and a belt type that transmits power from the engine 10 to the hydraulic continuously variable transmission 16. And a power transmission mechanism 17. Among these, the hydraulic continuously variable transmission 16 is configured as a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). For this reason, the hydraulic continuously variable transmission 16 generates hydraulic pressure by a hydraulic pump that is driven by power from the engine 10, and converts this hydraulic pressure into mechanical force (rotational force) by a hydraulic motor and outputs it. Thereby, the hydraulic continuously variable transmission 16 converts the power generated by the engine 10 into a force that causes the traveling vehicle body 2 to travel.

  At that time, the hydraulic continuously variable transmission 16 can change the forward and backward travel and the traveling speed of the traveling vehicle body 2 by changing the direction and the rotational speed of the rotational force. By changing the output and output direction of the hydraulic continuously variable transmission 16, it is possible to operate the forward and backward travel and the traveling speed of the traveling vehicle body 2.

  The hydraulic continuously variable transmission 16 is disposed in front of the engine 10 and below the floor surface of the floor step 26, and is disposed in front of the engine 10 when viewed from the upper surface of the traveling vehicle body 2. ing.

  The belt-type power transmission mechanism 17 includes a pulley attached to the output shaft of the engine 10, a pulley attached to the input shaft of the hydraulic continuously variable transmission 16, a belt wound around both pulleys, A tension pulley for adjusting the tension of the belt. As a result, the belt-type power transmission mechanism 17 can transmit the power generated by the engine 10 to the hydraulic continuously variable transmission 16 via the belt.

  Further, the power transmission device 15 is transmitted to the hydraulic continuously variable transmission 16 via the belt-type power transmission mechanism 17 and transmits the driving force from the engine 10 shifted by the hydraulic continuously variable transmission 16 to each part. It has a mission case 18 as a device. The transmission case 18 has a sub-transmission mechanism (not shown) for switching the working speed of the traveling vehicle body 2 when traveling on the road or planting, and is attached to the front portion of the main frame 7. The auxiliary transmission lever 38 can switch the traveling speed of the traveling vehicle body 2 by operating the auxiliary transmission mechanism in the mission case 18. The transmission case 18 shifts the output from the engine 10 transmitted via the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16 by the auxiliary transmission mechanism in the transmission case 18, and The power can be output separately for the driving power to the rear wheel 5 and the driving power to the seedling planting section 50.

  Among these, a part of the driving power can be transmitted to the front wheel 4 via the left and right front wheel final cases 21, and the rest can be transmitted to the rear wheel 5 via the left and right rear wheel gear cases 22. Yes. The left and right front wheel final cases 21 are disposed on the left and right sides of the mission case 18, respectively. The left and right front wheels 4 are connected to the left and right front wheel final cases 21 via axles. Further, the front wheel final case 21 is driven in accordance with the steering operation of the handle 32 and can steer the front wheel 4. Similarly, the rear wheels 5 are connected to the left and right rear wheel gear cases 22 via axles. On the other hand, the driving power is transmitted to a planting clutch (not shown) provided at the rear portion of the traveling vehicle body 2, and is transmitted to the seedling planting unit 50 by a planting transmission shaft (not shown) when the planting clutch is engaged. Is done.

  The seedling planting part lifting mechanism 40 for raising and lowering the seedling planting part 50 provided at the rear part of the traveling vehicle body 2 has a lifting link device 41, and the seedling planting unit 50 uses the lifting link device 41. It is attached to the traveling vehicle body 2 via. The lifting link device 41 includes a parallel link mechanism 42 that connects the rear portion of the traveling vehicle body 2 and the seedling planting portion 50. The parallel link mechanism 42 has an upper link and a lower link, and these links are rotatably connected to a rear-view portal-type link base frame 43 erected at the rear end of the main frame 7. The other end side of each link is rotatably connected to the seedling planting part 50, so that the seedling planting part 50 is connected to the traveling vehicle body 2 so as to be movable up and down.

  The seedling planting part lifting mechanism 40 has a hydraulic lifting cylinder 44 that expands and contracts by hydraulic pressure, and the seedling planting part 50 can be lifted and lowered by the expansion and contraction operation of the hydraulic lifting cylinder 44. The seedling planting part raising / lowering mechanism 40 can raise the seedling planting part 50 to the non-working position or lower it to the ground work position (ground planting position) by the raising / lowering operation.

  In addition, the seedling planting unit 50 can plant a range of seedlings in a plurality of sections or a plurality of rows. In the rice planting machine 1, a so-called six-row seedling planting section in which seedlings are planted in six sections. 50. The seedling planting unit 50 includes a seedling planting device 60, a seedling placement table 51, and floats 48 and 49. Among these, the seedling mounting base 51 is provided as a seedling mounting member for loading a plurality of seedlings on the rear part of the traveling vehicle body 2, and the seedling mounting bases for the number of planting strips partitioned in the left-right direction of the traveling vehicle body 2. It has a surface 52, and a mat-like seedling with soil can be placed on each seedling placement surface 52. Each time the seedling placed on the seedling placement stand 51 is planted and lost, the spare seedling is supplied from the spare seedling placement stand 65, so that there is no need to return the seedlings prepared outside the field and the operation is continued. Work efficiency is improved.

  The seedling planting device 60 is disposed below the seedling placement table 51 and supported by a planting support frame 55 that is a frame of the seedling planting unit 50 disposed on the front side of the seedling placement table 51. Has been. The seedling planting device 60 is a device that takes the seedlings placed on the seedling placement stand 51 from the seedling placement stand 51 and places the seedlings on the field, and has a planting transmission case 64 and a planting body 61. Yes. Among these, the planting body 61 is configured so as to be able to take seedlings from the seedling mounting table 51 and plant them in the field, and the planting transmission case 64 can supply driving force to the planting body 61. It is possible.

  Specifically, the planting transmission case 64 is configured to be able to supply the power transmitted from the engine 10 to the seedling planting unit 50 to the planting body 61, and the planting body 61 is connected to the planting transmission case 64. It is connected to be rotatable. In addition, the planting body 61 is rotatably connected to the planting transmission case 64 while supporting the planting basket 62 so as to rotate the planting basket 62 that takes seedlings from the seedling mounting table 51 and plantes them in the field. And a rotary case 63.

  The rotary case 63 includes an inconstant speed transmission mechanism (not shown) that can be rotated while changing the rotation speed when the implantation rod 62 is rotated by the driving force transmitted from the planting transmission case 64. ing. Thereby, at the time of rotation of the planting body 61, the planting basket 62 can rotate, changing a rotational speed with the rotation angle with respect to the rotary case 63. FIG.

  The seedling planting device 60 configured as described above is arranged for every two strips, that is, each of the plurality of seedling planting devices 60 is assigned a planting strip. Each planting transmission case 64 is provided with two planted bodies 61 so as to be rotatable, that is, two planting transmission cases 64 are provided with two rotary cases 63 on both sides in the lateral direction of the body. It is connected to. The seedling planting device 60 included in the rice planting machine 1 includes three planting transmission cases 64, and thus includes six planted bodies 61.

  In addition, the floats 48 and 49 slide on the farm scene with the movement of the traveling vehicle body 2 and level the ground, and the center float 48 located at the center of the seedling planting part 50 in the left-right direction of the traveling vehicle body 2; It has side floats 49 located on both sides of the seedling planting part 50 in the left-right direction.

  Further, a leveling rotor 67 for leveling the field is provided on the front side of the lower position of the seedling planting unit 50. The leveling rotor 67 is configured to be rotatable by the output from the engine 10 transmitted through the rear wheel gear case 22.

  In addition, on both the left and right sides of the seedling planting part 50, there are provided drawing markers 68 for forming a line that is a guide in the traveling direction on the next planting line. That is, the line drawing marker 68 draws a mark on the field when the rice planting machine 1 moves straight forward in the field and then moves straight forward on the field. The drawing marker 68 is operated by a marker motor 69 (not shown), and is configured so that the left and right drawing markers 68 can be switched each time the traveling vehicle body 2 turns. The left and right drawing markers 68 are replaced by a controller 150 (not shown) to which a marker motor 69 is connected. That is, the controller 150 is also provided as a marker switching device that alternately switches the left and right drawing markers 68 between the activated state and the inactivated state when the traveling vehicle body 2 turns. As shown in FIGS. 1 and 2, the drawing action portions of the left and right drawing markers 68 are provided with a plurality of protrusions on the outer periphery of the disk and are rotatably attached to the rod portion. The grounding resistance can surely form a line on the farm scene, and it becomes easy to perform a straight-ahead operation at the next planting work position, thereby improving work efficiency.

  The rice planting machine 1 includes a GPS control device 120 that acquires position information of the rice planting machine 1 by GPS (Global Positioning System), and the traveling vehicle body 2 is provided with a receiving antenna 121 that constitutes the GPS control device 120. It is installed. The receiving antenna 121 is provided as a position information acquisition device that acquires position information on the earth at predetermined intervals by acquiring GPS coordinates at predetermined time intervals. The receiving antenna 121 is attached to the upper part of the antenna frame 122.

  FIG. 3 is a side view of the antenna frame 122. By providing a dedicated frame for installing the receiving antenna 121 on the fuselage from the front end of the main frame 7 to the rear end of the main frame 7 and passing the operation unit 30 and the traveling seat 28, the vibration of the fuselage is reduced. It is difficult to be affected, and a working space on the aircraft can be secured.

  In addition, by fixing the antenna frame 122 from the rear end of the operation unit 30 to the front of the aircraft and from the traveling seat 28 to the rear of the aircraft, it is easy to get on and off from the left and right directions of the aircraft, thereby preventing deterioration in workability. it can.

  In addition, by providing the antenna frame 122 on the inner side in the left-right direction of the machine body from the operation unit 30 and the traveling seat 28, a work path and a space in the front-rear direction of the machine body can be secured, and deterioration of workability can be prevented.

  Front struts 117 and 117 that are erected from the front end of the machine body are provided in a bifurcated shape so that the front cover 31 can be opened and closed, so that maintenance of the control device and the like inside the front cover 31 and refueling workability to the gasoline tank are reduced. To prevent.

  A rotating part 117a for rotating the antenna frame 122 in the vertical direction is provided above the front supports 117, 117, and the antenna frame 122 and the rear are provided above the rear support 118, which is erected from the rear end of the airframe to the left and right center of the rear step 27. An attachment / detachment portion 122a is provided to allow the support column 118 to be attached / detached.

  The height of the antenna frame 122 can be reduced by removing the antenna frame 122 and the rear column 118 by the detachable portion 122a and rotating the antenna frame 122 downward by the rotating portion 117a, and there is a restriction on the height. The antenna frame 122 and the receiving antenna 121 can be prevented from being damaged by improving the storage property in the building and reducing the contact with the outside during the movement of the machine body.

  Further, by providing the rear support column 118 with a receiving portion 122b (FIG. 3A), the antenna frame 122 can be fixed when rotated downward, and contact with the work device 70 provided at the rear of the machine body is prevented. be able to.

  Further, when the antenna frame 122 is rotated downward, the lower end portion of the antenna frame 122 and the work device 70 provided at the rear of the machine body are restricted from rotating downward by a certain amount or more to prevent contact, or the antenna frame It is good also as providing an impact-absorbing material in the lower part of 122 and the contact part of the working device 70.

  In addition, a detachable portion 122a that allows the antenna frame 122 and the front struts 117 and 117 to be detachable is provided on the upper portion of the front struts 117 and 117, and a rotating portion that pivots the antenna frame 122 in the vertical direction on the rear strut 118. It may be provided.

  Further, by adjusting the antenna frame 122 up and down by the rotating portion 119a, the reception sensitivity can be adjusted by changing the height of the reception antenna 121.

  In addition, a removable information processing device may be attached to the antenna frame 122, and automatic straight advance may be performed based on the body position information acquired by the reception antenna 121.

  If the center mascot 9 is provided with a lamp that is turned on when, for example, the automatic steering device is activated, the automatic straight traveling mode, the following rotation interlocking mechanism mode, and the on / off of the seedling planting device 60 can be visually confirmed.

  By making the center mascot 9 into a bifurcated shape, the number of lamps can be increased, and it is not necessary to provide a lamp in the operation unit 30, so that a significant layout change is not necessary.

  Moreover, the visibility of a lamp | ramp improves by making the center mascot 9 into a forked shape.

  As shown in FIGS. 4 and 5, the receiving antenna 121 is attached to the top of the antenna frame 122 whose base end is connected to the front end side of the traveling vehicle body 2 so as to be positioned immediately above the front cover 31. . The height of the antenna frame 124 in the normal state is set to the height of the line of sight when a normal general male stands on the floor step 26.

  Therefore, since the height is not high enough to receive the vibration of the airframe, it is possible to prevent a decrease in reception accuracy. Further, since the receiving antenna 121 is provided at a height within a range where the male can stand up on the floor step 26 and reach his / her hand, the maintenance is excellent.

  However, the receiving antenna 121 does not hinder the field of view at the position where the operator seats 28. Basically, driving is performed while looking forward, but the rice transplanter is planting seedlings, so the line of sight is directed to the front and the lower side of the machine, so there is little work with the line of sight directed upward. Therefore, it is not an obstacle during work on the floor step 26.

  Moreover, the hole part 121b is provided so that the antenna support plate 121a may not interfere with the field of view. The strength of the antenna support plate 121a can also be maintained.

  In addition, a mechanism (not shown) for measuring the rotation speed of the wheel is provided, and the slip ratio is calculated in real time from the movement distance calculated from the wheel rotation speed and the movement distance measured by the receiving antenna 121, and the calculated slip ratio is calculated. Can be displayed on a map of a tablet terminal (not shown) mounted on the aircraft.

  Moreover, in order to detect the height of the seedling planting part 50, it calculates from the potentiometer (illustration omitted) which sees the link angle of the raising / lowering link apparatus 41, measures the depth of the field, and detects the field depth in real time. And know the characteristics of the field.

  Further, by providing a mechanism (not shown) that can measure the pressure of HST, the HST pressure can be known in real time, and the field characteristics can be known. From the HST pressure, it can be known that the traveling load on the field is large.

  The field depth and HST pressure can also be displayed on the tablet terminal map.

  The work vehicle according to the present invention improves workability and safety by allowing the receiving antenna for acquiring position information to recognize the position of the aircraft more accurately than before and preventing the antenna frame and receiving antenna from being damaged. This is useful as a working vehicle.

2 traveling vehicle body 4 front wheel 5 rear wheel 30 operation unit 31 front cover 117 front support 121 receiving antenna 121a antenna support plate 121b hole 122 antenna frame

Claims (4)

Work vehicle provided with a front wheel (4), a rear wheel (5) of a traveling vehicle body (2), a receiving antenna (121) for acquiring position information, and an antenna frame (122) for supporting the receiving antenna (121) In
The work vehicle, wherein the receiving antenna (121) is located on the front side of the aircraft and above the front wheel (4).   The reception antenna (121) is located on the front side of the aircraft from the operation unit (30) for operating the aircraft, and the reception antenna support plate (121a) supports the reception antenna (121) on the front side of the antenna frame (122). The work vehicle according to claim 1, further comprising:   The work vehicle according to claim 1 or 2, wherein the antenna support plate (121a) is provided with a hole (121b) toward the front rear of the machine body.   A front cover (31) that can be opened and closed provided in the operation unit (30) and a plurality of front struts (117) that support the antenna frame (122) on the front side of the body are provided on the left and right sides, and the front cover (31) is opened. The antenna frame (121) is positioned between the front struts (117) in a closed state and is fixed to the airframe on the front side of the airframe from the operation portion (30). The work vehicle according to any one of the preceding claims.

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