Crop harvester

Abstract

To simplify a transmission structure to a soiler and improve a degree of freedom of arrangement of the soiler when the soiler is configured to be driven to vibrate in a crop harvester.SOLUTION: A crop harvester includes: a soiler 21 that assists lifting up a crop from a field by a harvesting part by plunging to the field and collapsing soil in the field; a vibration device 22 that vibrates the soiler 21; and a vibration hydraulic motor 23 that is actuated when hydraulic oil is supplied from a hydraulic pump provided in a machine body and drives the vibration device 22.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a crop harvester for harvesting crops such as carrots, radishes, and onions in a field.

Background Art

[0002] In a carrot harvester, which is an example of a crop harvester, as disclosed in Patent Document 1, a harvesting unit is provided at the front of the machine body. As the machine body moves forward, the harvesting unit holds the crops in the field, and the held crops are lifted by being pulled out from the field and conveyed obliquely upward and rearward.

[0003] In Patent Document 1, in order to assist the harvesting unit in lifting the crops from the field, a soiler that penetrates into the field is provided at the lower part of the front of the harvesting unit. As the machine body moves forward, the soiler breaks up the soil in the field. In Patent Document 1, the soiler is driven to vibrate so that the function of breaking up the soil in the field by the soiler is improved. In Patent Document 1, the power of the engine mounted on the machine body is transmitted to the soiler of the harvesting unit by a mechanical transmission mechanism such as a transmission belt or a transmission shaft, and the soiler is configured to be driven to vibrate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] If, as in Patent Document 1, the power of the engine mounted on the machine body is transmitted to the soiler of the harvesting unit by a mechanical transmission mechanism, a large number of parts such as transmission belts, transmission shafts, and bearings are required. Therefore, there is room for improvement in terms of reducing the number of parts and production costs.

[0006] Mechanical transmission mechanisms are often difficult to arrange in any direction from the engine. As a result, a soiler is provided at a position where the mechanical transmission mechanism can be arranged, and the arrangement of the soiler is often restricted, so there is room for improvement.

[0007] An object of the present invention is to simplify the transmission structure to the soiler when the soiler is configured to be vibration-driven in a crop harvester, and to increase the degree of freedom in arranging the soiler.

Means for Solving the Problems

[0008] The crop harvester of the present invention includes a machine body provided with a traveling device, a harvesting unit provided at the front part of the machine body for holding crops in a field and lifting the held crops upward and obliquely rearward from the field, a soiler that enters the field and breaks up the soil in the field to assist the harvesting unit in lifting the crops from the field, a vibration device that applies vibration to the soiler, and a vibration hydraulic motor that operates by being supplied with hydraulic oil from a hydraulic pump provided on the machine body and drives the vibration device.

[0009] According to the present invention, a vibration device for applying vibration to the soiler and a vibration hydraulic motor for driving the vibration device are provided, and the vibration hydraulic motor operates by being supplied with hydraulic oil from a hydraulic pump provided on the machine body.

[0010] In this case, since a hydraulic hose, a hydraulic pipe, etc. may be connected between the hydraulic pump of the machine body and the vibration hydraulic motor, the number of parts can be reduced compared to a mechanical transmission mechanism, and the production cost can be reduced. Hydraulic hoses, hydraulic pipes, etc. can be easily arranged in any direction from the hydraulic pump of the machine body, so it becomes easy to arrange the soiler, the vibration device, and the vibration hydraulic motor at arbitrary positions, and the degree of freedom in arranging the soiler can be increased.

[0011] In the present invention, the harvesting unit includes a carrier that holds the leaf part of the crop in the field, lifts the crop with the leaf part held from the field, and conveys it obliquely rearward and upward, and a cutting device that is driven to cut the leaf part of the crop conveyed by the carrier and separate the crop from the carrier. The harvesting unit further includes a conveyance hydraulic motor that drives the carrier, a cutting hydraulic motor that drives the cutting device, a first hydraulic path that supplies hydraulic oil from the hydraulic pump to the conveyance hydraulic motor, and a second hydraulic path that supplies hydraulic oil from the hydraulic pump to the cutting hydraulic motor and the vibration hydraulic motor. It is preferable that the hydraulic oil of the hydraulic pump is supplied in parallel to the conveyance hydraulic motor, the cutting hydraulic motor, and the vibration hydraulic motor via the first hydraulic path and the second hydraulic path.

[0012] In a crop harvester, a carrier and a cutting device may be provided in the harvesting unit. The carrier holds the leaf part of the crop in the field, lifts the crop with the leaf part held from the field, and conveys it obliquely rearward and upward. The cutting device cuts the leaf part of the crop conveyed by the carrier and separates the crop from the carrier.

[0013] In a crop harvester, when one harvesting process is completed and the machine body reaches the end of the field, the harvesting unit is lifted from the field, the machine body is turned, and then the harvesting unit is lowered again to the field, and the operation of starting the next harvesting process may be repeated.

[0014] In this case, when the harvesting unit is lifted from the field, the carrier is often stopped. On the other hand, since the cutting device needs to be driven at a sufficient speed in advance to ensure the cutting performance when the next harvesting process starts, even when the harvesting unit is lifted from the field and the carrier is stopped, the cutting device is often maintained in a driven state. Similarly in the case of a soil cultivator, when the next harvesting process starts, it is preferable that the soil cultivator is driven at a sufficient vibration frequency in advance to improve the soil crumbling function of the field. Therefore, even when the harvesting unit is lifted from the field and the carrier is stopped, it is preferable that the soil cultivator is maintained in a vibration-driven state.

[0015] According to the present invention, a conveyance hydraulic motor for driving a carrier and a cutting hydraulic motor for driving a cutting device are provided. The hydraulic oil of a hydraulic pump is supplied to the conveyance hydraulic motor via a first hydraulic path, and the hydraulic oil of the hydraulic pump is supplied to the cutting hydraulic motor and a vibration hydraulic motor via a second hydraulic path. The conveyance hydraulic motor (first hydraulic path) and the cutting hydraulic motor and the vibration hydraulic motor (second hydraulic path) are in a parallel relationship. Thereby, even if the supply of the hydraulic oil to the conveyance hydraulic motor (first hydraulic path) is stopped and the carrier is stopped, the hydraulic oil is supplied to the cutting hydraulic motor and the vibration hydraulic motor (second hydraulic path) via the second hydraulic path. Therefore, the cutting device is maintained in a driven state, and the soiler is maintained in a vibration-driven state. Therefore, even if the harvesting unit is lifted from the field and the carrier is stopped, it is possible to obtain, without difficulty, that the cutting device is maintained in a driven state and that the soiler is maintained in a vibration-driven state.

[0016] In the present invention, it is preferable that the vibration hydraulic motor is provided on the downstream side of the cutting hydraulic motor, the hydraulic oil of the hydraulic pump is supplied to the cutting hydraulic motor via the second hydraulic path, and the hydraulic oil from the cutting hydraulic motor is supplied to the vibration hydraulic motor.

[0017] The cutting device needs to be driven at a sufficient speed to ensure the cutting performance. On the other hand, since the soiler penetrates into the field, even if it is not vibration-driven at a sufficient vibration frequency, the soil of the field can be broken by the forward movement of the machine body.

[0018] According to the present invention, the hydraulic oil is supplied to the cutting hydraulic motor (cutting device), and the hydraulic oil from the cutting hydraulic motor is supplied to the vibration hydraulic motor (soiler). Thereby, even if a vibration hydraulic motor for vibration-driving the soiler is provided, it is possible to obtain, without difficulty, a state in which the cutting device is driven at a sufficient speed.

[0019] In the present invention, it is preferable to include a collecting unit for collecting the harvested crops, a conveying conveyor for conveying the crops detached from the carrier to the collecting unit, and a conveyor hydraulic motor provided on the downstream side of the vibration hydraulic motor and driven by the hydraulic oil supplied from the vibration hydraulic motor, and a flow rate adjusting unit provided between the vibration hydraulic motor and the conveyor hydraulic motor and capable of adjusting the flow rate of the hydraulic oil supplied to the conveyor hydraulic motor.

[0020] In a crop harvester, there may be provided a collecting unit for installing a collecting box or a collecting bag for storing the harvested crops, and a conveying conveyor for conveying the crops whose leaf parts have been cut off by a cutting device and detached from the carrier to the collecting unit. The operator may visually check the crops conveyed by the conveying conveyor, remove the crops with insufficient growth from the conveying conveyor, or adjust the conveyance of the crops by the conveying conveyor to the collecting unit. To perform these operations, the operator may adjust the conveying speed of the conveying conveyor.

[0021] According to the present invention, the conveyor hydraulic motor for driving the conveying conveyor is provided on the downstream side of the vibration hydraulic motor, and the flow rate adjusting unit capable of adjusting the flow rate of the hydraulic oil supplied to the conveyor hydraulic motor is provided between the vibration hydraulic motor and the conveyor hydraulic motor.

[0022] Thereby, the operator can adjust the flow rate of the hydraulic oil supplied to the conveyor hydraulic motor by operating the flow rate adjusting unit, and adjust the conveying speed of the conveying conveyor (the rotational speed of the conveyor hydraulic motor). Since the flow rate adjusting unit is provided on the downstream side of the vibration hydraulic motor, even if the flow rate adjusting unit is operated, the cutting hydraulic motor (cutting device) and the vibration hydraulic motor (soil tiller) are not affected.

[0023] In the present invention, the vibration device includes a rotating body having a plurality of convex portions and concave portions alternately provided along the circumferential direction on the outer peripheral portion, and being rotationally driven by the vibration hydraulic motor, a contact body contacting the outer peripheral portion of the rotating body and being pushed radially outward of the rotating body by the convex portion, and a linkage mechanism connected across the contact body and the tiller, and transmitting the operation of the contact body being pushed radially outward of the rotating body by the convex portion to the tiller to displace the tiller forward. When the concave portion reaches the contact body, due to the resistance from the field accompanying the forward movement of the machine body, the tiller is displaced rearward, and through the linkage mechanism, the contact body enters the concave portion. When the convex portion reaches the contact body, the contact body is pushed radially outward of the rotating body by the convex portion, and through the linkage mechanism, the tiller is displaced forward against the resistance of the field accompanying the forward movement of the machine body, which is preferable.

[0024] According to the present invention, the vibration device includes a rotating body, a contact body contacting the outer peripheral portion of the rotating body, and a linkage mechanism connected across the contact body and the tiller, and the rotating body is rotationally driven by a vibration hydraulic motor.

[0025] For the tiller entering the field, as the machine body moves forward, resistance is applied from the field, so the tiller tends to be displaced rearward. In the above state, when the rotating body is rotationally driven and the concave portion of the rotating body reaches the contact body, due to the resistance from the field accompanying the forward movement of the machine body, the tiller is displaced rearward, and through the linkage mechanism, the contact body enters the concave portion of the rotating body. When the rotating body is rotationally driven and the convex portion of the rotating body reaches the contact body, the contact body is pushed radially outward of the rotating body by the convex portion of the rotating body, and this operation of the contact body is transmitted to the tiller through the linkage mechanism, and the tiller is displaced forward against the resistance of the field accompanying the forward movement of the machine body.

[0026] According to the present invention, when the contact body enters the concave portion of the rotating body and the contact body is pushed radially outward of the rotating body by the convex portion of the rotating body are repeated, the tiller is vibrationally driven back and forth. Accordingly, by effectively utilizing the resistance applied to the soiler from the field as the machine body moves forward, a vibration device can be obtained with a simple configuration of rotationally driving a rotating body provided with convex and concave portions, so that the production cost can be reduced.

[0027] In the present invention, it is preferable that a support frame attachable to the harvesting unit is provided, and the soiler, the vibration device, and the vibration hydraulic motor are attached to the support frame.

[0028] According to the present invention, the soiler, the vibration device, and the vibration hydraulic motor are attached to the support frame, and by attaching the support frame to the harvesting unit, the soiler, the vibration device, and the vibration hydraulic motor are attached to the harvesting unit. As a result, the soiler, the vibration device, the vibration hydraulic motor, and the support frame are configured as a single unit, so that it becomes easier to produce two types of crop harvesters: a crop harvester equipped with a soiler and a crop harvester not equipped with a soiler, and the production cost can be reduced.

[0029] In the present invention, it is preferable that auxiliary wheels grounded on the field are attached to the support frame.

[0030] According to the present invention, by attaching the auxiliary wheels to the support frame, the height from the field to the support frame is maintained substantially constant. As a result, the penetration depth of the soiler into the field is maintained substantially constant, so that the function of the soiler to break up the soil in the field is stably exerted.

[0031] According to the present invention, the soiler, the vibration device, the vibration hydraulic motor, the auxiliary wheels, and the support frame are configured as a single unit, so that it becomes easier to produce two types of crop harvesters: a crop harvester equipped with a soiler and a crop harvester not equipped with a soiler, and the production cost can be reduced.

[0032] In the present invention, it is preferable that the harvesting unit is provided on one of the right and left sides of the machine body, the driving unit on which the operator rides is provided on the other of the right and left sides of the machine body, and the support frame is attached to the harvesting unit so as to be positioned on the left-right center side of the machine body with respect to the harvesting unit.

[0033] In a crop harvester, the harvesting unit may be provided on one of the right and left sides of the machine body, and the driving unit on which the operator rides may be provided on the other of the right and left sides of the machine body (it may be provided on the side opposite to the harvesting unit). For example, when the harvesting unit is provided on the left side of the machine body and the driving unit is provided on the right side of the machine body, the operator drives the machine body so that the left side (opposite to the driving unit) with respect to the harvesting unit becomes an unharvested area where the crop has not yet been harvested, and the right side (on the left-right center side of the machine body) with respect to the harvesting unit becomes a harvested area where the crop has already been harvested, and harvests the crop.

[0034] According to the present invention, the support frame is attached to the harvesting unit so as to be positioned on the left-right center side of the machine body (the harvested area of the crop) with respect to the harvesting unit. Thereby, the unit of the soiler to the support frame does not come into contact with the crop in the unharvested area and damage the crop. In Patent Document 1, the soiler is provided in a narrow area between the harvesting unit and the lower field. On the other hand, according to the present invention, the unit of the soiler to the support frame is provided in a wide area on the lateral side of the harvesting unit and can be attached to the harvesting unit without difficulty.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0036] Figs. 1 to 6 show a carrot harvester which is an example of a crop harvester. F indicates the forward direction, B indicates the rear direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0037] (Overall Configuration of the Carrot Harvester) As shown in Figs. 1, 2, and 3, right and left crawler-type traveling devices 2 are provided on the machine body 1, and the machine body 1 is supported by the traveling devices 2. The machine body 1 is configured in a frame shape by connecting a frame (not shown) along the front-rear direction and a frame (not shown) along the left-right direction.

[0038] The driver's cab 3 on which the operator rides is provided at the right part of the front of the machine body 1, and the harvesting section 4 is provided at the left part of the front of the machine body 1 so as to be capable of lifting and lowering operation. The conveyor 13 is provided along the front-rear direction on the left part of the machine body 1, and the conveyor 5 is provided along the left-right direction at the rear of the machine body 1. The collection section 6 is provided at the right part of the machine body 1, and the auxiliary seat 7 is provided behind the conveyor 5.

[0039] (Configuration of the Harvesting Section) As shown in Figs. 2 and 3, the harvesting section 4 is provided with a triggering device 8, conveyor belts 9 (corresponding to a conveying body), conveyor belts 10 (corresponding to a conveying body), a rotary blade 11 (corresponding to a cutting device), a root cutting device 12, and the like.

[0040] Right and left conveyor belts 9 are provided, and the right and left conveyor belts 9 are aligned with each other in plan view and extend obliquely rearward and upward from the lower part of the front of the harvesting section 4 in side view.

[0041] The right and left conveyor belts 10 are provided, and the right and left conveyor belts 10 are aligned with each other in plan view and provided behind the conveyor belt 9. The right and left rotary blades 11 are provided below the conveyor belts 10. The undercutting device 12 is provided below the conveyor belt 9.

[0042] (Harvesting of carrots by a carrot harvester)-1 As shown in FIGS. 1, 2, and 3, the operator in the operation unit 3 causes the left side (opposite side to the operation unit 3) of the harvesting unit 4 to be an unharvested area where the carrots A (corresponding to the crop) have not yet been harvested, and the right side (the left and right center side of the machine body 1) (the operation unit 3 side) of the harvesting unit 4 to be a harvested area where the carrots A have already been harvested, and drives the machine body 1 to harvest the carrots A.

[0043] As the machine body 1 moves forward, while the leaf part A1 of the carrot A in the field is lifted upward by the lifting device 8, the leaf part A1 of the carrot A enters the starting ends of the right and left conveyor belts 9, and the leaf part A1 of the carrot A is clamped by the conveyor belt 9.

[0044] As the machine body 1 moves forward and the conveyor belt 9 is rotationally driven, the carrot A is pulled out and lifted from the field by the conveyor belt 9 and conveyed obliquely rearward upward. As described later, the soil in the field is collapsed as the machine body 1 moves forward by the soil tiller 21 that has entered the field, and the pulling out and lifting of the carrot A from the field by the harvesting unit 4 (conveyor belt 9) is assisted. The fibrous roots at the lower end of the carrot A conveyed by the conveyor belt 9 are cut by the undercutting device 12.

[0045] In the left part of the machine body 1, a conveying conveyor 13 is provided below the conveyor belts 10 and the rotary blades 11. A guide plate 14 that inclines obliquely rearward downward is provided behind the conveyor belt 10. A guide plate 15 that inclines downward toward the left and right center of the machine body 1 is provided at the rear part of the left part of the machine body 1.

[0046] The leaf part A1 of the carrot A conveyed rearward and upward by the conveying belt 9 is transferred to the conveying belt 10 and clamped. While the carrot A is being conveyed rearward by the conveying belt 10, the rotating blade 11 cuts between the carrot A and the leaf part A1, and the carrot A detaches from the conveying belts 9 and 10 and falls onto the conveying conveyor 13. The leaf part A1 is conveyed rearward by the conveying belt 10, discharged onto the guide plate 14, falls from the guide plate 14 to the guide plate 15, and then falls onto the field at the rear side of the machine body 1.

[0047] (Harvesting of Carrots by a Carrot Harvester)-2 As shown in FIGS. 1, 2, and 3, the collection part 6 is provided with a container support base 16 provided at the right part of the conveying conveyor 5, a placement table 17 provided along the front-rear direction at the right part of the machine body 1, and the like.

[0048] The carrot A that has fallen onto the conveying conveyor 13 is conveyed rearward by the conveying conveyor 13, and is transferred from the conveying conveyor 13 to the conveying conveyor 5 by the guiding member 18, and then conveyed rightward by the conveying conveyor 5.

[0049] The operator on the auxiliary seat 7 places the box-shaped empty container 19 on the container support base 16. The carrot A conveyed by the conveying conveyor 5 is put into the container 19 on the container support base 16 from the right end of the conveying conveyor 5. The operator on the auxiliary seat 7 visually observes the carrot A conveyed by the conveying conveyor 5 and takes out the carrot A with insufficient growth from the conveying conveyor 5.

[0050] When the container 19 on the container support base 16 is full of carrots A, the operator on the auxiliary seat 7 moves the container 19 on the container support base 16 to the placement table 17 and at the same time places the empty container 19 on the container support base 16. After the operator on the auxiliary seat 7 moves the container 19 on the container support base 16 to the placement table 17, the operator moves this container 19 to the front part of the placement table 17.

[0051] (Correspondence with Claims in a Carrot Harvester (Crop Harvester)) The aircraft 1 is provided with a traveling device 2, and a harvesting unit 4 is provided at the front of the aircraft 1, which holds the crops (carrots A) in the field and conveys the held crops (carrots A) upward obliquely rearward from the field. The harvesting unit 4 is provided on one of the right and left parts of the aircraft 1, and the driving unit 3 on which the operator rides is provided on the other of the right and left parts of the aircraft 1.

[0052] The harvesting unit 4 includes a conveyor (conveyor belts 9, 10) that holds the leaf part A1 of the crops (carrots A) in the field and conveys the crops (carrots A) holding the leaf part A1 upward obliquely rearward from the field, and a cutting device (rotating blade 11) that is driven to cut the leaf part A1 of the crops (carrots A) conveyed by the conveyor (conveyor belts 9, 10) and separates the crops (carrots A) from the conveyor (conveyor belts 9, 10).

[0053] A collecting unit 6 for collecting the harvested crops (carrots A) is provided. Conveyor conveyors 5, 13 for conveying the crops (carrots A) separated from the conveyor (conveyor belts 9, 10) to the collecting unit 6 are provided.

[0054] (Overall structure of the support frame with soil tiller ~ auxiliary wheels attached) As shown in FIGS. 1, 2, and 3, a support frame 20 is provided, and a soil tiller 21, a vibration device 22, a hydraulic motor 23 (corresponding to a vibration hydraulic motor), and an auxiliary wheel 24 are attached to the support frame 20.

[0055] As shown in FIGS. 4 and 5, the support frame 20 is configured in a square pipe shape, and a bracket 20a is connected to the rear part, and the bracket 20a is bolted to the right part of the harvesting unit 4.

[0056] As shown in FIGS. 1, 2, and 3, the support frame 20 to which the soil tiller 21 to the auxiliary wheel 24 are attached is provided in the unharvested area of the carrots A with respect to the harvesting unit 4, and is provided on the left and right center side (driving unit 3 side) of the aircraft 1 with respect to the harvesting unit 4.

[0057] When the harvesting unit 4 is lowered to the field, the soil tiller 21 enters the field. As the machine body 1 moves forward, the soil tiller 21 breaks up the soil in the field, and the lifting of the carrot A from the field by the harvesting unit 4 (conveyor belt 9) is assisted. As will be described later, the soil tiller 21 is vibration-driven by a vibration device 22 and a hydraulic motor 23, and the function of the soil tiller 21 to break up the soil in the field is improved.

[0058] The bracket 20b is connected to the front part of the support frame 20, and the auxiliary wheel 24 is attached to the bracket 20b. When the harvesting unit 4 is lowered to the field, the auxiliary wheel 24 contacts the field, so that the heights of the harvesting unit 4 and the support frame 20 with respect to the field are maintained substantially constant, and the penetration depth of the soil tiller 21 into the field is maintained substantially constant.

[0059] (Correspondence with the claims in the overall structure of the support frame to which the soil tiller - auxiliary wheel is attached) A soil tiller 21 that enters the field and breaks up the soil in the field to assist the harvesting unit 4 in lifting the crop (carrot A) from the field, and a vibration device 22 that applies vibration to the soil tiller 21 are provided.

[0060] A support frame 20 that can be attached to the harvesting unit 4 is provided, and the soil tiller 21, the vibration device 22, and the vibration hydraulic motor (hydraulic motor 23) are attached to the support frame 20. An auxiliary wheel 24 that contacts the field is attached to the support frame 20. The support frame 20 is attached to the harvesting unit 4 so as to be located on the left - right center side of the machine body 1 with respect to the harvesting unit 4.

[0061] (Vibration structure of the soil tiller) As shown in FIGS. 4 and 5, the swing member 25 is attached to the front end of the support frame 20 so as to be swingable around the axis P1 along the left-right direction. The tiller 21 is bolted to the swing member 25 and extends downward from the swing member 25. By changing the connection position of the tiller 21 to the swing member 25 up and down, the position of the tiller 21 with respect to the support frame 20 and the swing member 25 is changed up and down.

[0062] The mounting base 26 is connected to the upper part of the support frame 20, and the vibration device 22 is attached across the swing member 25 and the mounting base 26. The vibration device 22 is provided with a rotating body 27, a contact body 28, and a linking link 29 (corresponding to a linking mechanism).

[0063] In the vibration device 22, the convex portions 27a and the concave portions 27b of the rotating body 27 are alternately provided on the outer peripheral portion along the circumferential direction. The rotating body 27 is connected to the drive shaft 30, and the drive shaft 30 is rotatably attached to a pair of bearing portions 31 connected to the mounting base 26 around the axis P2 along the left-right direction.

[0064] The bracket 32 is connected across the support frame 20 and the mounting base 26, and the hydraulic motor 23 is attached to the bracket 32. A transmission chain 33 is attached across the sprocket 30a attached to the end of the drive shaft 30 and the sprocket 23a of the hydraulic motor 23. The hydraulic motor 23 and the transmission chain 33 rotationally drive the rotating body 27 (drive shaft 30) in the rotation direction B1.

[0065] The boss member 53 is rotatably attached to the upper end of the swing member 25 around the axis P3 along the left-right direction. A pair of linking links 29 are connected to the boss member 53 and extend rearward from the boss member 53. A long hole 29a along the front-rear direction is opened at the rear portion of the linking link 29, and the drive shaft 30 is inserted into the long hole 29a, and the linking link 29 is maintained in the posture shown in FIG. 4.

[0066] The contact body 28 is formed in a disc shape and is rotatably attached to the rear end portion of the link 29 around the axis P4 along the left - right direction. The contact body 28 contacts a portion of the rotating body 27 on the side opposite to the swinging member 25 (the share 21).

[0067] (Vibration state of the share) As shown in FIGS. 4 and 5, when the machine body 1 moves forward with the share 21 entering the field, the share 21 is pushed backward by the resistance from the field. As a result, the share 21 (the swinging member 25) tends to swing backward (clockwise in FIG. 4) around the axis P1, so the link 29 is operated forward, and the contact body 28 is pressed against the outer peripheral portion of the rotating body 27.

[0068] In the above - mentioned state, the rotating body 27 is rotationally driven in the rotation direction B1 by the hydraulic motor 23. When the concave portion 27b of the rotating body 27 reaches the contact body 28 due to the rotational drive of the rotating body 27, due to the resistance from the field accompanying the forward movement of the machine body 1, the share 21 (the swinging member 25) is displaced backward (clockwise in FIG. 4), the link 29 is displaced forward, and the contact body 28 enters the concave portion 27b of the rotating body 27.

[0069] When the convex portion 27a of the rotating body 27 reaches the contact body 28 due to the rotational drive of the rotating body 27, the contact body 28 is pushed out backward (radially outward in the radius direction of the rotating body 27) by the convex portion 27a of the rotating body 27. Due to the operation of the contact body 28, the link 29 is displaced backward, and the share 21 (the swinging member 25) is displaced forward (counterclockwise in FIG. 4) against the resistance of the field accompanying the forward movement of the machine body 1.

[0070] In a state where the share 21 (the swinging member 25) tends to be displaced backward (clockwise in FIG. 4) due to the resistance from the field accompanying the forward movement of the machine body 1, when the rotating body 27 is rotationally driven in the rotation direction B1, the contact body 28 enters the concave portion 27b of the rotating body 27, and the contact body 28 is pushed out backward (radially outward in the radius direction of the rotating body 27) by the convex portion 27a of the rotating body 27 are repeated, the share 21 is vibrationally driven back and forth.

[0071] (Correspondence with Claims in the Vibration Structure of the Soil Auger) The vibration device 22 has a rotating body 27 in which a plurality of convex portions 27a and concave portions 27b are alternately provided along the circumferential direction on the outer peripheral portion, and which is rotationally driven by a vibration hydraulic motor (hydraulic motor 23), a contact body 28 that contacts the outer peripheral portion of the rotating body 27 and is pushed radially outward of the rotating body 27 by the convex portion 27a, and a linkage mechanism (linkage link 29) that is connected across the contact body 28 and the soil auger 21 and transmits the operation of the contact body 28 being pushed radially outward of the rotating body 27 by the convex portion 27a to the soil auger 21 to displace the soil auger 21 forward.

[0072] When the concave portion 27b reaches the contact body 28, due to the resistance from the field accompanying the forward movement of the machine body 1, the soil auger 21 is displaced rearward, and the contact body 28 enters the concave portion 27b via the linkage mechanism (linkage link 29). When the convex portion 27a reaches the contact body 28, the contact body 28 is pushed radially outward of the rotating body 27 by the convex portion 27a, and via the linkage mechanism (linkage link 29), the soil auger 21 is displaced forward against the resistance of the field accompanying the forward movement of the machine body 1.

[0073] (Configuration of the Hydraulic Circuit) - 1 As shown in FIG. 6, in the harvesting unit 4, a hydraulic motor 34 (corresponding to a conveying hydraulic motor) for rotationally driving the conveying belts 9 and 10 is provided, and a hydraulic motor 35 (corresponding to a cutting hydraulic motor) for rotationally driving the rotary blade 11 is provided. A hydraulic motor 36 (corresponding to a conveyor hydraulic motor) for rotationally driving the conveying conveyors 5 and 13 is provided.

[0074] An engine 37 and a hydraulic pump 38 are provided on the machine body 1, and the hydraulic pump 38 is driven by the engine 37. An oil passage 40 extends from the hydraulic pump 38, and a relief valve 39 is connected to the oil passage 40. The oil passage 40 branches into an oil passage 41 (corresponding to a first hydraulic path) and an oil passage 42 (corresponding to a second hydraulic path), and the hydraulic oil of the hydraulic pump 38 is supplied in parallel to the oil passage 41 and the oil passage 42.

[0075] The operation valve 43 is connected to the oil passage 41, and the hydraulic oil in the oil passage 41 is supplied to the hydraulic motor 34 via the operation valve 43 and the oil passage 54, and the conveyor belts 9 and 10 are rotationally driven by the hydraulic motor 34. The operation valve 43 is provided with a stop position 43N, a forward rotation position 43A, and a reverse rotation position 43B, and is configured to be electromagnetically operated, and is biased to the stop position 43N.

[0076] When the operation valve 43 is operated to the stop position 43N, the supply of the hydraulic oil is cut off at the operation valve 43 (stop position 43N), and the hydraulic motor 34 (conveyor belts 9 and 10) stops. When the operation valve 43 is operated to the forward rotation position 43A, the hydraulic oil in the oil passage 41 is supplied to the hydraulic motor 34, and the hydraulic motor 34 (conveyor belts 9 and 10) is driven to rotate forward.

[0077] The pilot-operated on-off valve 44 is provided in the oil passage 41, and the on-off valve 44 is operated to the open position in the normal state. When a jam of the carrot A or the like occurs in the conveyor belts 9 and 10 and the load applied to the conveyor belts 9 and 10 becomes larger than the set value, the on-off valve 44 is operated to the closed position, and the hydraulic motor 34 (conveyor belts 9 and 10) stops.

[0078] In the maintenance work or the like of the conveyor belts 9 and 10, when the operation valve 43 is operated to the reverse rotation position 43B, the hydraulic oil in the oil passage 41 is supplied to the hydraulic motor 34 (conveyor belts 9 and 10), and the hydraulic motor 34 (conveyor belts 9 and 10) is driven to rotate in reverse.

[0079] (Configuration of the hydraulic circuit) - 2 As shown in FIG. 6, the operation valve 45 is connected to the oil passage 42. The operation valve 45 is provided with a stop position 45N and an operating position 45A, is configured to be electromagnetically operated, and is biased to the stop position 45N.

[0080] The oil passage 46 from the operation valve 45 is connected to the hydraulic motor 35. The oil passage 47 from the hydraulic motor 35 extends forward along the body 1 to the harvesting unit 4 and is connected to the hydraulic motor 23. The oil passage 48 from the hydraulic motor 23 extends rearward along the harvesting unit 4 and is connected to the hydraulic motor 36 of the body 1. The oil passages 47 and 48 are constituted by hydraulic hoses, hydraulic pipes, etc.

[0081] When the operation valve 45 is operated to the stop position 45N, the supply of the hydraulic oil is shut off at the operation valve 45 (stop position 45N), the hydraulic motor 35 (rotating blade 11) stops, the hydraulic motor 23 (soil tiller 21 and vibration device 22) stops, and the hydraulic motor 36 (conveyor 5, 13) stops.

[0082] When the operation valve 45 is operated to the operating position 45A, the hydraulic oil in the oil passage 42 is supplied to the hydraulic motor 35 via the oil passage 46, and the hydraulic motor 35 (rotating blade 11) is rotationally driven. The hydraulic oil from the hydraulic motor 35 is supplied to the hydraulic motor 23 via the oil passage 47, and the hydraulic motor 23 (soil tiller 21 and vibration device 22) is rotationally driven. The hydraulic oil from the hydraulic motor 23 is supplied to the hydraulic motor 36 via the oil passage 48, and the hydraulic motor 36 (conveyor 5, 13) is rotationally driven.

[0083] The pilot-operated on-off valve 49 is provided in the oil passage 42, and the on-off valve 49 is normally operated to the open position. When a clogging such as of the carrot A occurs in any of the rotating blade 11, the soil tiller 21 and the vibration device 22, and the conveyor 5, 13, and the load applied to any of the rotating blade 11, the soil tiller 21 and the vibration device 22, and the conveyor 5, 13 becomes larger than the set value, the on-off valve 49 is operated to the closed position, and the hydraulic motor 35 (rotating blade 11), the hydraulic motor 23 (soil tiller 21 and vibration device 22), and the hydraulic motor 36 (conveyor 5, 13) stop.

[0084] (Configuration of the hydraulic circuit) - 3 As shown in Fig. 6, an oil passage 50 is connected to an oil passage 48 (corresponding to the portion between the hydraulic motor 23 and the hydraulic motor 36), and a variable throttle portion 51 (corresponding to a flow rate adjusting portion) is provided in the oil passage 50.

[0085] A part of the hydraulic oil in the oil passage 48 is discharged through the oil passage 50 and the variable throttle portion 51. By operating the variable throttle portion 51 to the open side and the closed side, the flow rate of the hydraulic oil discharged through the oil passage 50 and the variable throttle portion 51 is adjusted.

[0086] When the operation is performed on the side where the flow rate of the hydraulic oil discharged through the oil passage 50 and the variable throttle portion 51 is small, the hydraulic motor 36 is rotationally driven at a high speed, and the conveying speed of the conveying conveyors 5 and 13 becomes high. When the operation is performed on the side where the flow rate of the hydraulic oil discharged through the oil passage 50 and the variable throttle portion 51 is large, the hydraulic motor 36 is rotationally driven at a low speed, and the conveying speed of the conveying conveyors 5 and 13 becomes low.

[0087] As shown in Fig. 2, an adjusting portion 52 capable of operating the variable throttle portion 51 is provided at the rear portion of the conveying conveyor 5. The operator on the auxiliary seat 7 can operate the adjusting portion 52 to set the conveying conveyors 5 and 13 to an appropriate conveying speed while visually observing the conveying state of the carrots A on the conveying conveyors 5 and 13.

[0088] (Correspondence with the claims in the configuration of the hydraulic circuit) A vibration hydraulic motor (hydraulic motor 23) that operates by being supplied with hydraulic oil from a hydraulic pump 38 provided on the machine body 1 and drives the vibration device 22 is provided.

[0089] A conveying hydraulic motor (hydraulic motor 34) that drives a conveying body (conveying belts 9 and 10) and a cutting hydraulic motor (hydraulic motor 35) that drives a cutting device (rotating blade 11) are provided. A first hydraulic path (oil passage 41) for supplying the hydraulic oil from the hydraulic pump 38 to the conveying hydraulic motor (hydraulic motor 34) is provided. A second hydraulic path (oil passage 42) is provided to supply hydraulic oil from the hydraulic pump 38 to the cutting hydraulic motor (hydraulic motor 35) and the vibration hydraulic motor (hydraulic motor 23). The hydraulic oil of the hydraulic pump 38 is supplied in parallel to the conveying hydraulic motor (hydraulic motor 34), the cutting hydraulic motor (hydraulic motor 35), and the vibration hydraulic motor (hydraulic motor 23) via the first hydraulic path (oil passage 41) and the second hydraulic path (oil passage 42).

[0090] The vibration hydraulic motor (hydraulic motor 23) is provided on the downstream side of the cutting hydraulic motor (hydraulic motor 35). The hydraulic oil of the hydraulic pump 38 is supplied to the cutting hydraulic motor (hydraulic motor 35) via the second hydraulic path (oil passage 42), and the hydraulic oil from the cutting hydraulic motor (hydraulic motor 35) is supplied to the vibration hydraulic motor (hydraulic motor 23).

[0091] A conveyor hydraulic motor (hydraulic motor 36) that drives the conveyor 5, 13 is provided on the downstream side of the vibration hydraulic motor (hydraulic motor 23), and the hydraulic oil from the vibration hydraulic motor (hydraulic motor 23) is supplied thereto. A flow rate adjusting section (variable throttle section 51) that is provided between the vibration hydraulic motor (hydraulic motor 23) and the conveyor hydraulic motor (hydraulic motor 36) and can adjust the flow rate of the hydraulic oil supplied to the conveyor hydraulic motor (hydraulic motor 36) is provided.

[0092] (First alternative embodiment of the invention) In the vibration device 22, the rotating body 27 and the contact body 28 may be abolished, and a crank arm (not shown) that is rotationally driven by the hydraulic motor 23 may be provided, and the linking link 29 may be configured to be connected across the crank arm and the swinging member 25. According to this configuration, the crank arm is rotationally driven by the hydraulic motor 23, the linking link 29 is reciprocally driven in the front-rear direction, and the tiller 21 is vibrationally driven.

[0093] (Second alternative embodiment of the invention) In the vibration device 22, the connecting link 29 may be abolished. According to this configuration, the contact body 28 may be attached to the upper end of the swing member 25 so as to be rotatable around the axis P3, the rotating body 27 may be provided on the front side with respect to the contact body 28, and the contact body 28 may be configured to contact the rotating body 27. In this configuration, the upper portions of the swing member 25 and the soiler 21 form a linkage mechanism.

[0094] (The third alternative form of the invention implementation) Instead of the container 19, a large collection bag (not shown) may be suspended from the collection unit 6, and the harvested crop may be configured to be put into the collection bag.

[0095] (The fourth alternative form of the invention implementation) The collection unit 6 and the conveying conveyor 5 may be abolished. According to this configuration, the crop is pulled out and lifted from the field, and the crop pulled out from the field is placed back in the field. After that, the crop placed in the field is collected by another crop harvester.

[0096] (The fifth alternative form of the invention implementation) Instead of the rotary blade 11, a clipper-type cutting device may be provided.

[0097] (The sixth alternative form of the invention implementation) Two hydraulic pumps 38 may be provided. According to this configuration, the hydraulic oil of one hydraulic pump 38 may be supplied to the hydraulic motor 34 via the first hydraulic path, and the hydraulic oil of the other hydraulic pump 38 may be supplied to the hydraulic motors 23, 35, and 36 via the second hydraulic path.

[0098] (The seventh alternative form of the invention implementation) The operation unit 3 may be provided on the left part of the front portion of the machine body 1, and the harvesting unit 4 may be provided on the right part of the front portion of the machine body 1. According to this configuration, the support frame 20 to which the soiler 21 to the auxiliary wheels 24 are attached is attached to the left part of the harvesting unit 4.

[0099] (Eighth Alternative Embodiment of the Invention) In the support frame 20, the auxiliary wheel 24 may not be attached. According to this configuration, the auxiliary wheel 24 may be directly attached to the harvesting unit 4.

[0100] (Ninth Alternative Embodiment of the Invention) Instead of the crawler-type traveling device 2, front wheels and rear wheels may be provided as the traveling device 2. The front wheels and the rear crawler traveling device may be provided as the traveling device 2.

Industrial Applicability

[0101] The present invention can be applied not only to ginseng harvesters but also to crop harvesters such as radish harvesters and onion harvesters.

Explanation of Reference Numerals

[0102] 1 Machine body 2 Traveling device 3 Operating unit 4 Harvesting unit 5 Conveyor 6 Collection unit 9 Conveyor belt (carrier) 10 Conveyor belt (carrier) 11 Rotary blade (cutting device) 13 Conveyor 20 Support frame 21 Soiler 22 Vibration device 23 Hydraulic motor (vibration hydraulic motor) 24 Auxiliary wheel 27 Rotating body 27a Protrusion 27b Recess 28 Contact body 29 Linking link (linking mechanism) 34 Hydraulic motor (conveyor hydraulic motor) 35 Hydraulic motor (cutting hydraulic motor) 36 Hydraulic motor (conveyor hydraulic motor) 38 Hydraulic pump 41 Oil passage (first hydraulic path) 42 Oil passage (second hydraulic passage) 51 Variable throttle section (flow rate adjustment section) A Carrot (crop) A1 Leaf part

Claims

1. An airframe provided with a traveling device, a harvesting unit provided at the front of the airframe, holding crops in a field, lifting the held crops from the field, and conveying them obliquely rearward and upward, a soiler that enters the field and collapses the soil in the field to assist the harvesting unit in lifting the crops from the field, a vibration device that applies vibration to the soiler, a crop harvester comprising a vibration hydraulic motor that is operated by being supplied with hydraulic oil from a hydraulic pump provided on the airframe and drives the vibration device.

2. The harvesting unit includes a carrier that holds the leaf parts of the crops in the field, lifts the crops with the leaf parts held from the field, and conveys them obliquely rearward and upward, and a cutting device that is driven to cut the leaf parts of the crops conveyed by the carrier and detach the crops from the carrier. a conveyance hydraulic motor that drives the carrier, a cutting hydraulic motor that drives the cutting device, a first hydraulic path that supplies hydraulic oil from the hydraulic pump to the conveyance hydraulic motor, a second hydraulic path that supplies hydraulic oil from the hydraulic pump to the cutting hydraulic motor and the vibration hydraulic motor, The crop harvester according to claim 1, wherein the hydraulic oil of the hydraulic pump is supplied in parallel to the conveyance hydraulic motor, the cutting hydraulic motor, and the vibration hydraulic motor via the first hydraulic path and the second hydraulic path.

3. The vibration hydraulic motor is provided on the downstream side of the cutting hydraulic motor, The crop harvester according to claim 2, wherein the hydraulic oil of the hydraulic pump is supplied to the cutting hydraulic motor via the second hydraulic path, and the hydraulic oil from the cutting hydraulic motor is supplied to the vibration hydraulic motor.

4. a collection unit that collects the harvested crops, a conveyance conveyor that conveys the crops detached from the carrier to the collection unit, a conveyor hydraulic motor that is provided on the downstream side of the vibration hydraulic motor and is driven by being supplied with hydraulic oil from the vibration hydraulic motor, The crop harvester according to claim 3, further comprising a flow rate adjustment unit provided between the vibration hydraulic motor and the conveyor hydraulic motor and capable of adjusting the flow rate of the hydraulic oil supplied to the conveyor hydraulic motor.

5. The vibration device has a rotating body in which a plurality of convex portions and concave portions are alternately provided along the circumferential direction on the outer peripheral portion, and which is rotationally driven by the vibration hydraulic motor, a contact body that contacts the outer peripheral portion of the rotating body and is pushed radially outward of the rotating body by the convex portion, and a linkage mechanism that is connected across the contact body and the tiller and transmits the operation of the contact body being pushed radially outward of the rotating body by the convex portion to the tiller to displace the tiller forward. When the concave portion reaches the contact body, due to the resistance from the field accompanying the forward movement of the machine body, the tiller is displaced rearward, and through the linkage mechanism, the contact body enters the concave portion. When the convex portion reaches the contact body, the contact body is pushed radially outward of the rotating body by the convex portion, and through the linkage mechanism, the tiller is displaced forward against the resistance of the field accompanying the forward movement of the machine body. The crop harvester according to claim 1.

6. A support frame that can be attached to the harvesting unit is provided. The crop harvester according to claim 1, wherein the tiller, the vibration device, and the vibration hydraulic motor are attached to the support frame.

7. The crop harvester according to claim 6, wherein auxiliary wheels that contact the field are attached to the support frame.

8. The harvesting unit is provided on one of the right and left portions of the machine body. The driving unit on which the operator rides is provided on the other of the right and left portions of the machine body. The crop harvester according to claim 6, wherein the support frame is attached to the harvesting unit so as to be located on the left - right center side of the machine body with respect to the harvesting unit.

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