JP2020202883A - Work vehicle - Google Patents

Abstract

To provide a work vehicle capable of reducing radio interference in a GPS receiver while taking storage performance into account.SOLUTION: In a work vehicle provided with a reception antenna (121) for acquiring positional information on a travelling vehicle body (2) and an antenna frame (122) for supporting the reception antenna (121), the travelling vehicle body (2) is provided with an operation seat (28) on which an operator is seated, and a plurality of openable front covers (31) in an operation part (30) for operating a machine body, and a plurality of front supports (117) for supporting the antenna frame (122) on a front side of the machine body on right and left sides. The front covers (31) are positioned between the front supports (117), and the antenna frame (122) is positioned above the operation part (30).SELECTED DRAWING: Figure 3

Description

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

This agricultural work vehicle is equipped with a GPS receiving device so that the traveling direction of the vehicle body can be recognized and the vehicle is steered by an automatic control device so as to go straight.

Japanese Unexamined Patent Publication No. 2016-42857 Japanese Unexamined Patent Publication No. 2016-007198

In order to recognize the position of the aircraft more accurately in the field, by providing a frame for mounting the GPS receiving device at a high position, reception failure can be prevented at a minimum and the accuracy is improved.

However, this frame does not take into account that the accuracy of the GPS receiver is reduced by the vibration of the airframe.

For this reason, since the position of the airframe is not accurately recognized, for example, there is a problem that the agricultural work vehicle provided with the automatic straight-ahead function moves in an unintended direction.

In addition, since the overall height of the airframe is increased by the frame, the frame and the GPS receiving device may come into contact with each other and be damaged when the airframe is stored in a barn or the like.

In view of such problems of the conventional work vehicle, it is an object of the present invention to provide a work vehicle in which reception failure of the GPS receiving device is reduced and storage capacity is also taken into consideration.

In order to solve the above problems, the invention of claim 1 provides a receiving antenna (121) for acquiring position information of the traveling vehicle body (2) and an antenna frame (122) for supporting the receiving antenna (121). In the work vehicle
An operation seat (28) on which an operator sits is provided on the traveling vehicle body (2).
A front openable and closable front cover (31) provided for an operation unit (30) for operating the airframe, and a plurality of front columns (117) for supporting the antenna frame (122) on the front side of the airframe are provided on the left and right, and the front cover (31) Is located between the front stanchions (117)
The antenna frame (122) is a work vehicle characterized in that it is located above the operation unit (30).

The invention of claim 2 is provided with a rotating portion (119a) capable of rotating the antenna frame (122) in the vertical direction, and when the antenna frame (122) is rotated downward, a certain amount or more is provided. The work vehicle according to claim 1, wherein the rotation is restricted.

According to the third aspect of the present invention, the antenna frame (122) is fixed to the front side and the rear side of the traveling vehicle body (2), and the antenna frame (122) is vertically attached to the front portion of the antenna frame (122). An antenna support frame (118) for supporting the antenna frame (122) is provided at the rear portion of the antenna frame (122) by providing the rotating portion (119a) capable of rotating the antenna frame (122). The work vehicle according to claim 1 or 2, wherein the antenna frame (122) can be rotated downward by removing the antenna frame (118) from the antenna support frame (118).

According to the fourth aspect of the present invention, a rotating portion (119a) for rotating the antenna frame (122) in the vertical direction is provided on the upper portion of the front support column (117), and the rear step (27) is centered left and right from the rear end of the machine body. 1 to 3, wherein the antenna frame (122) and the detachable portion (122a) for detaching the antenna support frame (118) are provided on the upper part of the rear support column (118) erected in the above. The work vehicle according to any one of the above items.

According to the invention of claim 1, by locating the front cover (31) between the front columns (117), the front cover (31) can be opened and closed, and the inside of the front cover (31) can be opened and closed. Prevents maintenance of control devices and deterioration of workability for refueling gasoline tanks. Further, since it is located above the operation unit (30), it is not easily affected by the vibration of the machine body, and a work space on the machine body can be secured.

Further, since it is located above the operation unit (30), it is not easily affected by the vibration of the machine body, and a work space on the machine body can be secured.

Further, according to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to prevent contact with a working device provided behind the machine body.

Further, the reception sensitivity can be adjusted by changing the height of the receiving antenna (121) by adjusting the height up and down.

Further, according to the third aspect of the present invention, in addition to the effect of the invention of the first or second aspect, the height of the antenna frame (122) is lowered by rotating the antenna frame (122) downward. This can be done, and damage can be avoided by preventing contact between the antenna frame (122) and the receiving antenna (121) when the aircraft is stored in a barn or the like.

Further, since the antenna frame (122) is located at a position that does not hinder the movement of the aircraft in the front-rear direction, it is possible to get on and off from the front.

Further, according to the fourth aspect of the present invention, in addition to the effect of the invention according to any one of the first to third aspects, the antenna frame (122) and the rear support column (122a) are provided by the detachable portion (122a). By removing 118) and rotating the antenna frame (122) downward by the rotating portion (119a), the height of the antenna frame (122) can be lowered, and the antenna frame (122) can be stored in a building with a limited height. It is possible to prevent damage to the antenna frame (122) and the receiving antenna (121) by improving the performance and reducing contact with the outside while the aircraft is moving.

It is a side view of the work vehicle which concerns on embodiment of this invention. It is a front view of the work vehicle shown in FIG. It is a side view of the antenna frame.

The rice transplanter 1 is provided with 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. As a result, the traveling vehicle body 2 can travel on a field or a road. Further, in the rear part of the traveling vehicle body 2, a seedling planting portion 50 that can be raised and lowered by the seedling planting portion raising and lowering mechanism 40 is arranged as a work device for performing work in the field.

The traveling vehicle body 2 has a main frame 7 arranged substantially in the center of the vehicle body, an engine 10 mounted on the main frame 7, and a power for transmitting the power of the engine 10 to the drive wheels and the seedling planting portion 50. It is provided with a transmission device 15. The engine 10 and the power transmission device 15 constitute a traveling device 8 which is a device for traveling on a field or a road. Further, in the work vehicle according to the present embodiment, the power generated by the engine 10 which is the power source is used not only for moving the traveling vehicle body 2 forward and backward, but also for driving the seedling planting portion 50. It is used and heat engines such as diesel engines and gasoline engines are used.

Further, the engine 10 is arranged substantially at the center of the traveling vehicle body 2 in the left-right direction and in a state of protruding upward from the floor step 26 on which the operator puts his / her foot when riding. 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, and a part of the floor step 26 is formed into a grid pattern on the shoes. It is possible to drop the attached mud into the field. Further, behind the floor step 26, a rear step 27 that also serves as a fender for the rear wheels 5 is provided. The rear step 27 has an inclined surface that is inclined upward toward the rear, and is arranged on each of the left and right sides of the engine 10. At the bottom of the floor step 26 and the rear step 27, a boarding sensor 14 for detecting that an operator is on board due to an increase in weight is provided.

The engine 10 projects upward from these floor steps 26 and the rear step 27, and an engine cover 11 covering the engine 10 is disposed at 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 in which an operator is seated above the engine cover 11, and is in front of the control seat 28 and in the front central portion of the traveling vehicle body 2. 30 is arranged. The control unit 30 is arranged so as to project 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 on the front portion of the control unit 30. Further, on the upper part of the control unit 30, an operation lever or the like for operating the operation device, instruments, a steering wheel 32, and an automatic steering switch are arranged. The steering wheel 32 is provided as a steering member that steers the traveling vehicle body 2 by the operator steering the front wheels 4, and can steer the front wheels 4 via an operating device or the like in the control unit 30. It is possible. Further, as the operation levers, the speed change lever 35, which is a speed change operation member for switching between the forward / backward movement of the traveling vehicle body 2 and the traveling output, and the auxiliary traveling operation for switching the traveling speed of the traveling vehicle body 2 to a speed according to the traveling place The auxiliary speed change lever 38, which is a member, is arranged on the right side and the left side of the machine body.

The control unit 30 is composed of a lower cover 33 into which the mounting claw 33b is inserted into the floor step 26 and an upper cover 34 covering the upper portion. The lower end peripheral edge 34a of the upper cover 34 is bent inward and overlapped with the upper end peripheral edge 33a of the lower cover 33. By assembling, the appearance of the joint is improved.

Further, a spare seedling stand 65 on which the seedlings for replenishment are placed is arranged on the left and right side portions of the control unit 30 in the floor step 26. The spare seedling stand 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.

Further, the power transmission device 15 is a hydraulic continuously variable transmission 16 which is a transmission that shifts the driving force transmitted from the engine 10, and a belt type which transmits the power from the engine 10 to the hydraulic continuously variable transmission 16. It has a power transmission mechanism 17. Of these, the hydraulic continuously variable transmission 16 is configured as a hydrostatic continuously variable transmission called an HST (Hydr Static Transmission). Therefore, the hydraulic continuously variable transmission 16 generates flood control by a hydraulic pump driven by power from the engine 10, and converts this flood control into mechanical force (rotational force) by a hydraulic motor and outputs it. As a result, the hydraulic continuously variable transmission 16 converts the power generated by the engine 10 into a force for driving the traveling vehicle body 2.

At that time, the hydraulic continuously variable transmission 16 can change the forward / backward movement and the traveling speed of the traveling vehicle body 2 by changing the direction of the rotational force and the rotational speed, and the speed change lever 35 By changing the output and the output direction of the hydraulic continuously variable transmission 16, it is possible to control the forward / backward movement and the traveling speed of the traveling vehicle body 2.

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

Further, 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, and further. It is equipped with a tension pulley that adjusts 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 which is a device. The mission case 18 is provided with an auxiliary transmission mechanism (not shown) for switching the working speed of the traveling vehicle body 2 when traveling on a road or when 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 transmission 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 to the front wheels 4. The power for traveling to the rear wheel 5 and the power for driving the seedling planting portion 50 can be output separately.

Of these, part of the running power can be transmitted to the front wheels 4 via the left and right front wheel final cases 21, and the rest can be transmitted to the rear wheels 5 via the left and right rear wheel gear cases 22. There is. The left and right front wheel final cases 21 are arranged on the left and right sides of the mission case 18, and 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 according to the steering operation of the steering wheel 32, and the front wheel 4 can be steered. 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 the planting clutch (not shown) provided at the rear of the traveling vehicle body 2, and is transmitted to the seedling planting portion 50 by the planting transmission shaft (not shown) when the planting clutch is engaged. Will be done.

Further, the seedling planting section elevating mechanism 40 for raising and lowering the seedling planting section 50 provided at the rear portion of the traveling vehicle body 2 has an elevating link device 41, and the seedling planting section 50 uses the elevating link device 41. It is attached to the traveling vehicle body 2 via. The elevating 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 gate type link base frame 43 erected at the rear end of the main frame 7. By rotatably connecting the other end side of each link to the seedling planting portion 50, the seedling planting portion 50 is movably connected to the traveling vehicle body 2.

Further, the seedling planting section elevating mechanism 40 has a hydraulic elevating cylinder 44 that expands and contracts by flood control, and the seedling planting portion 50 can be elevated and lowered by the expansion and contraction operation of the hydraulic elevating cylinder 44. The seedling planting part elevating mechanism 40 can raise the seedling planting part 50 to a non-working position or lower it to a ground working position (ground planting position) by the raising and lowering operation.

Further, the seedling planting section 50 can plant seedlings in a plurality of sections or in a plurality of rows, and in the rice transplanter 1, seedlings are planted in six sections, so-called six-row planting section. It is 50. The seedling planting section 50 includes a seedling planting device 60, a seedling placing table 51, and floats 48 and 49. Of these, the seedling placing table 51 is provided as a seedling placing member for loading a plurality of seedlings on the rear part of the traveling vehicle body 2, and the seedlings are placed for the number of planting rows partitioned in the left-right direction of the traveling vehicle body 2. It has a surface 52, and it is possible to place a mat-shaped seedling with soil on each seedling loading surface 52. By supplying spare seedlings from the spare seedling stand 65 every time the seedlings placed on the seedling stand 51 are planted and disappear, there is no need to return to pick up the seedlings prepared outside the field, and continuous work is performed. Because it can be done, work efficiency is improved.

Further, the seedling planting device 60 is arranged in the lower part of the seedling placing table 51, and is supported by the planting support frame 55 which is a frame of the seedling planting portion 50 arranged on the front side of the seedling placing table 51. Has been done. The seedling planting device 60 is a device for taking seedlings placed on the seedling stand 51 and planting them in the field, and has a planting transmission case 64 and a planting body 61. There is. Of these, the planting body 61 is configured so that seedlings can be taken from the seedling placing table 51 and planted in the field, and the planting transmission case 64 can supply a 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 provided in the planting transmission case 64. On the other hand, they are rotatably connected. Further, the planting body 61 is rotatably connected to the planting rod 62, which takes seedlings from the seedling placing table 51 and is planted in the field, and the planting rod 62 while rotatably supporting the planting rod 62. It has a rotary case 63.

The rotary case 63 is equipped with a non-uniform speed transmission mechanism (not shown) that can rotate the planting rod 62 while changing the rotation speed when the implanting rod 62 is rotated by the driving force transmitted from the planting transmission case 64. ing. As a result, when the planting body 61 is rotated, the implanting rod 62 can rotate while the rotation speed changes depending on the rotation angle with respect to the rotary case 63.

One seedling planting device 60 configured in this way is arranged every two rows, that is, each of the plurality of seedling planting devices 60 is assigned a planting row. Further, each planting transmission case 64 is provided with two planting bodies 61 rotatably, that is, in one planting transmission case 64, two rotary cases 63 are provided on both sides in the left-right direction of the machine body. Is connected to. The seedling planting device 60 included in the rice transplanter 1 includes three planting transmission cases 64, thereby providing a planting body 61 for six rows.

Further, the floats 48 and 49 slide on the field scene and level the ground as the traveling vehicle body 2 moves, and the float 48 and the center float 48 located at the center of the seedling planting portion 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 portion 50 in the left-right direction.

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

Further, on both the left and right sides of the seedling planting portion 50, drawing markers 68 forming a line serving as a guide for the traveling direction are provided on the next planting strip. That is, the line drawing marker 68 draws a mark on the field when the rice transplanter 1 turns straight ahead at the ridge of the field and then moves straight forward in the field. The drawing marker 68 is operated by a marker motor 69, and is configured so that the left and right drawing markers 68 can be switched and operated each time the traveling vehicle body 2 turns. The left and right line drawing markers 68 are exchanged by the controller 150 to which the marker motor 69 (not shown) is connected. That is, the controller (not shown) is also provided as a marker switching device that alternately switches the left and right line drawing markers 68 between the operating state and the non-operating 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 peripheral portion of the disk and are rotatably attached to the rod portion. The grounding resistance makes it possible to reliably form a line in the field scene, facilitating straight-ahead work at the next planting work position, and improving work efficiency.

Further, the rice transplanter 1 is provided with a GPS control device 120 that acquires the position information of the rice transplanter 1 by GPS (Global Positioning System), and a receiving antenna 121 constituting the GPS control device 120 is arranged on the traveling vehicle body 2. It is set up. 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 equipping the airframe with the receiving antenna 121 from the front end of the main frame 7 to the rear end of the main frame 7, and making the shape pass above the operation unit 30 and the traveling seat 28, the vibration of the airframe can be prevented. It is not easily affected and can secure a work space on the aircraft.

Further, by fixing the antenna frame 122 in front of the machine from the rear end of the operation unit 30 and behind the machine from the traveling seat 28, it is easy to get on and off from the left and right directions of the machine, so that it is possible to prevent deterioration of workability. it can.

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

The front columns 117 and 117, which 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 to maintain the control device inside the front cover 31 and reduce the workability of refueling the gasoline tank. To prevent.

A rotating portion 117a for rotating the antenna frame 122 in the vertical direction is provided above the front columns 117 and 117, and the antenna frame 122 and the rear are above the rear columns 118 which are erected from the rear end of the machine body in the center of the left and right of the rear step 27. A detachable portion 122a is provided so that the support column 118 can be detached.

The height of the antenna frame 122 can be lowered by removing the antenna frame 122 and the rear strut 118 by the detachable portion 122a and rotating the antenna frame 122 downward by the rotating portion 119a, and there is a height limitation. Damage to the antenna frame 122 and the receiving antenna 121 can be prevented by improving the storability in the building and reducing the contact with the outside while the aircraft is moving.

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

Further, when the antenna frame 122 is rotated downward, the lower end portion of the antenna frame 122 and the working device 70 provided at the rear of the machine body are restricted from rotating downward by a certain amount or more in order to prevent contact with the antenna frame. A shock absorbing material may be provided at the contact portion between the lower portion of the 122 and the working device 70.

Further, a detachable portion 122a for detaching the antenna frame 122 and the front columns 117 and 117 is provided on the upper part of the front columns 117 and 117, and a rotating portion for rotating the antenna frame 122 in the vertical direction is provided on the upper part of the rear column 118. It may be provided.

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

Further, a removable information processing device may be attached to the antenna frame 122 to automatically go straight based on the aircraft position information acquired by the receiving antenna 121.

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

By forming the center mascot 9 into a bifurcated shape, the number of lamps can be increased, and since it is not necessary to provide lamps in the operation unit 30, it is not necessary to significantly change the layout.

Further, by making the center mascot 9 a bifurcated shape, the visibility of the lamp is improved.

In the work vehicle according to the present invention, the receiving antenna that acquires the position information recognizes the position of the aircraft more accurately than before, and prevents damage to the antenna frame and the receiving antenna, thereby improving workability and safety. It is useful as a work vehicle to make.

2 Traveling vehicle body 28 Control seat 27 Rear step 30 Operation unit 31 Front cover 117 Front support 118 Antenna support frame 119a Rotating unit 121 Receiver antenna 122 Antenna frame 122a Detachable part

Claims (4)

In a work vehicle provided with a receiving antenna (121) for acquiring position information of a traveling vehicle body (2) and an antenna frame (122) for supporting the receiving antenna (121).
An operation seat (28) on which an operator sits is provided on the traveling vehicle body (2).
A front openable and closable front cover (31) provided for an operation unit (30) for operating the airframe, and a plurality of front columns (117) for supporting the antenna frame (122) on the front side of the airframe are provided on the left and right, and the front cover (31) Is located between the front stanchions (117)
The work vehicle, wherein the antenna frame (122) is located above the operation unit (30). A rotating portion (119a) capable of rotating the antenna frame (122) in the vertical direction is provided, and when the antenna frame (122) is rotated downward, rotation beyond a certain level is restricted. The work vehicle according to claim 1. The antenna frame (122) is fixed to the front side and the rear side of the traveling vehicle body (2).
An antenna support frame (122) for supporting the antenna frame (122) by providing the rotating portion (119a) capable of rotating the antenna frame (122) in the vertical direction on the front portion of the antenna frame (122). 118) is provided at the rear portion of the antenna frame (122), the antenna frame (122) can be removed from the antenna support frame (118), and the antenna frame (122) can be rotated downward. The work vehicle according to claim 1 or 2. A rear strut (119a) for rotating the antenna frame (122) in the vertical direction is provided on the upper part of the front strut (117), and is erected from the rear end of the machine body to the center of the left and right of the rear step (27). The method according to any one of claims 1 to 3, wherein the antenna frame (122) and the detachable portion (122a) for detaching the antenna support frame (118) are provided on the upper portion of the 118). Work vehicle.

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