JP7030863B2 - Harvester - Google Patents

Description

The present invention relates to an elevating device for a raising device of a harvester, and more particularly to an elevating device capable of freely swinging the raising device of a sugar cane harvester in a wider range.

Conventionally, a sugar cane harvester in which a raising device is supported by an elevating device consisting of a front link mechanism and a rear link mechanism, the raising device is raised and lowered by the front link mechanism, and the raising device can be moved back and forth by the rear link mechanism has become known. (See, for example, Patent Document 1).

Jikkai Sho 58-161425 Gazette

However, in the case of the technique in Patent Document 1, the elevating height of the raising device is not sufficient, and there is a possibility that the raising device may interfere with Ayumi or the ground when it is placed on or lowered from a truck. Therefore, the raising device is supported by an elevating link mechanism composed of a front link mechanism and a rear link mechanism so as to be able to move up and down, the rear link mechanism is raised and lowered by the elevating drive means, and the front link mechanism becomes the rear link mechanism within a predetermined angle. On the other hand, the structure is such that it can be mounted up and down freely to solve the above-mentioned problems. As a result, a sufficient amount of climb can be secured, and the raising device tries to provide a sugarcane harvester that does not interfere with the ground or Ayumi.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.
That is, in claim 1, a harvester provided with a cutting device, a transport device for transporting the stems cut by the cutting device in a sideways posture, and a processing unit for cutting the stems transported by the transport device to a predetermined size. The elevating device is arranged in the front part of the machine frame so as to be able to move up and down via the elevating link mechanism, the elevating link mechanism has a front link mechanism and a rear link mechanism, and the front link mechanism is the above. The link of the front link mechanism, which is attached to the rear link mechanism so as to be able to move up and down within a predetermined angle by the swing restricting portion and whose swing is regulated by the swing regulating portion, is at the lowermost position . At this time , the swing is regulated by the swing restricting portion in the state of the forward tilt.

In claim 2, the rear link mechanism is moved up and down by an elevating drive means.
In claim 3, the front link mechanism and the rear link mechanism connect the same frame member, respectively, the front link mechanism can freely swing within a predetermined angle, and the rear link mechanism freely swings. It has a moving range and a swing range due to the elevating drive means.

As the effect of the present invention, the following effects are exhibited.
According to the present invention, the front part of the raising device can be raised so as not to interfere with the ground or Ayumi when the harvester enters or leaves the field or is loaded onto a truck.

In addition, since the same frame member is shared, when the pulling device is loaded from the front, the load after the front link mechanism reaches the ascending limit of the elevating range is applied to the rear link mechanism through the same frame member. Therefore, the load that cannot be avoided by the front link mechanism can be avoided by the free swing of the rear link mechanism.

A side view showing the overall configuration of a sugar cane harvester. Front view showing the overall configuration of a sugar cane harvester. Side view of the raising device and the elevating link mechanism. Perspective view of the raising device and the elevating link mechanism. Side view of the main link. The figure which shows the free swing range by the front four section link and the rear four section link. Side view of the weeding tool. Perspective view of the weeding tool.

First, from FIGS. 1 and 2, the overall structure of the embodiment in which the harvester is the sugar cane harvester 1 will be described. In addition, the front-rear direction is defined with the F direction as the front, and the description will be given. The sugar cane harvester 1 supports a machine frame 30 on a crawler type traveling device 10 as a traveling unit, and a cutting device, a transporting device, a processing unit, a wind sorting device 7, and a discharging unit 80 are attached to the machine frame 30. The cutting section mounting frame 31 is fixed in the vertical direction on the left and right sides of the front portion of the machine frame 30, and the top cutter 17 is mounted on the upper portion of the cutting section mounting frame 31 via the parallel link mechanism 32. A pair of left and right raising devices, crop dividers 2 and 2, are attached to 31 via an elevating link mechanism 12, which will be described later. The traveling portion may be a foil type.

Since the crop divider 2 is symmetrically configured, one of the left and right sides will be described. The crop divider 2 is provided on the upper part of the weeding frame 2a in which the augers 2b and 2c are arranged substantially parallel to the weeding frame 2a and rotatably supported on the front part of the weeding frame 2a which is arranged tilted backward. It is driven by the hydraulic motors 2d and 2e. A side-viewing substantially triangular-shaped weeding tool 40 is projected forward from the lower part of the weeding frame 2a. In this way, it pulls into the cabin while causing sugar cane.

The top cutter 17 is arranged so as to be able to move up and down in front of and above the crop divider 2, and the parallel link mechanism 32 is moved up and down so as to be adjustable in height by expanding and contracting the hydraulic cylinder. The top cutter 17 is provided with a cutting blade at the center of the lower left and right, and is provided with a guide rod 33, a guide plate 34, and the like protruding outward from the left and right sides of the cutting blade so as to bring the upper part of the sugar cane toward the center of the left and right. In this way, the unnecessary leaf part on the upper part of the sugar cane is moved to the center of the left and right sides of the machine body and cut by the cutting blade.

Behind between the left and right crop dividers 2 and 2, a scraping rotor 13, a base cutter 3 serving as a cutting device, and a front transfer device 4 are supported by a front transfer frame 14. A pair of left and right front transport frames 14 are provided, and the rear portion is pivotally supported on the machine frame 30 at the front end position of the rear transport device 5 so as to be vertically rotatable. A hydraulic cylinder is interposed between the front portion of the front transport frame 14 and the machine frame 30, and the height can be adjusted by raising and lowering the base cutter 3 and the suction rotor 13 by expanding and contracting the hydraulic cylinder. There is.

The base cutter 3 is fixed to the left and right support cylinders 3a / 3a vertically extending downward from the front portion of the front transport frame 14, and a plurality of support cylinders 3a / 3a fixed to the outer periphery of the support disk fixed to the lower ends of the support cylinders 3a / 3a. The cutting blades 3b and 3b ..., the rod-shaped spirals 3c and 3c fixed on the support disk, and a hydraulic motor for rotationally driving the cutting blades 3b and the spiral 3c. The suction rotor 13 includes a rotating shaft having an axial center in the left-right direction at the front ends of the left and right front transport frames 14 and being rotatably supported, and a blade body fixed on the rotating shaft. , The rotary shaft is rotationally driven by a hydraulic motor.

The front transport device 4 has an axial center in the left-right direction, and a plurality of pairs of upper and lower feed rollers are arranged in the front-rear direction. Both sides of the roller shafts of the feed rollers are rotatably supported by the left and right transport cases, and the upper roller. The shaft is configured to be able to transmit power by a chain, and the lower roller shaft is configured to be able to transmit power by a gear, and each is connected to a hydraulic motor.

In this way, the stem of sugarcane is scraped by the rotation of the scraping rotor 13, and the stem is cut by the rotation of the cutting blades 3b and 3b of the base cutter 3, and at the same time, the lower end of the stem by the rotation of the spiral 3c and 3c ( The root) is flipped up. The sugar cane that has been bounced up is drawn from the root into the front transport device 4 arranged immediately after that, and is fed diagonally backward and upward by the feed roller of the front transport device 4.

The rear portion of the front transport device 4 is located at the front portion of the rear transport device 5. The post-conveyor device 5 is composed of a roller type conveyor that feeds backwards at appropriate intervals on the upper side and the lower side, respectively. In this way, the sugar cane after being cut by the base cutter 3 is sent backward by the front transfer device 4, inherited by the rear transfer device 5, and is conveyed diagonally backward and upward. In this way, the transport device is composed of the front transport device 4 and the rear transport device 5.

A chopping device 6 serving as a processing unit is arranged at the rear portion of the rear transfer device 5. The chopping device 6 comprises a cutter. The cutter has blade blades fixed on a pair of upper and lower cutter shafts that have a center of axis in the left-right direction, and when the sugar cane passes between the upper and lower blade blades that rotate, it is cut to a predetermined size and is blown backward. There is.

The wind selection device 7 includes a blower case 7a provided at the rear upper portion of the chopping device 6 and a blower housed in the blower case 7a. The lower and upper sides of the blower case 7a are opened, the lower part of the blower case 7a is communicated with the chopping device 6, and the upper side is a discharge port for leaves, dust, and the like. The blower case 7a is rotatable about the axis in the vertical direction, and the discharge direction can be changed. The blower is housed in the blower case 7a with the vertical direction as the axis, and by rotating the blower, a high-speed air flow from the bottom to the top is generated and diffused by the rotation of the diffusion rotor, and the leaves after shredding. The heavy stems fall onto the hopper 18 provided at the bottom of the lower discharge conveyor 8 so that dust and dirt can be sucked upward and discharged laterally or backward.

The lower portion of the discharge conveyor 8 is supported on a swivel table 20 provided at the rear of the machine frame 30, and the swivel table 20 is supported so as to be rotatable left and right with the vertical direction as an axis. The discharge conveyor 8 is rotated left and right so that the discharge direction can be changed. However, in the present embodiment, the discharge conveyor 8 is attached to the rear part of the machine frame 30, but a storage bag may be attached to the rear part of the machine frame 30 to store the falling sugar cane.

A control unit is arranged on the left and right center of the front portion of the airframe frame 30, and the control unit is covered by the cabin 19. A seat, a steering handle, a speed change lever, and the like are arranged in the cabin 19. An engine serving as a drive source is arranged above the front transfer device 4 behind the cabin 19, and the engine is a hydraulic pump for operating a hydraulic motor for traveling or driving the transfer device, a hydraulic cylinder for raising and lowering, and the like. Are connected and driven.

The elevating link mechanism 12 includes a pair of left and right front four-node links 50, a rear four-node link 60, a hydraulic cylinder 70 as an elevating drive means, and the like. Since the elevating link mechanism 12 is symmetrically configured, the left side will be described. As shown in FIGS. 3 and 4, the rear four-section link 60 includes an upper link 61, a lower link 62, a support shaft 63, 64, 65, 66, a front link 67, and the like.

The upper link 61 is composed of a main link 61a / 61a, a reinforcing link 61b, and a connecting rod 61c, and the rear portion of the upper link 61 is rotatably supported on the upper portion of the cutting portion mounting frame 31 via a support shaft 63. The front portion of the upper link 61 is rotatably supported on the upper part of the front link 67 via the support shaft 65, and the rear portion of the upper link 51 of the front four-node link 50 is also rotatably supported. Further, one end of the hydraulic cylinder 70 (the tip of the rod in this embodiment) is connected to the front upper portion of the upper link 61 via the support shaft 68. A swing restricting portion 71 of the rear four-node link 60 is disposed at the tip of the hydraulic cylinder 70, and the other end is pivotally supported at the lower part of the cutting portion mounting frame 31. In the present embodiment, the swing restricting portion 71 has an elongated hole formed at the tip of the rod in parallel with the expansion / contraction direction, and the support shaft 68 is penetrated through the elongated hole so as to be slidable in the elongated hole. In this way, the rear four-node link 60, that is, the crop divider 2 serving as the weeding device, can swing up and down in the elongated hole serving as the swing restricting portion 71. In this way, as shown in FIG. 6A, the crop divider 2 can be greatly moved up and down by expanding and contracting the hydraulic cylinder 70. Further, as shown in FIGS. 6 (b) to 6 (c), the swing is free to swing within the range regulated by the swing control unit 71.

As shown in FIGS. 4 and 5, the main link 61a has a substantially triangular front portion, and the rear portions of the left and right main links 61a and 61a have support holes 61a1 for inserting and fixing the bearing pipe 69. 61a1 is opened, the support shaft 63 is inserted into the bearing pipe 69, and both sides of the support shaft 63 are connected and supported by the cutting portion mounting frame 31. A fixing hole 61a2 for inserting and fixing the connecting rod 61c is opened in the middle of the front and rear of the main link 61a, and a support hole 61a3 for inserting and supporting the support shaft 68 connected to the hydraulic cylinder 70 is opened in the front upper portion. Support holes 61a4 and 61a4 for inserting and fixing the bearing pipe 73 are opened in the front lower portions of the left and right main links 61a and 61a, the support shaft 65 is inserted into the bearing pipe 73, and the upper links 51 are provided on both sides of the support shaft 65. The rear is supported. A swing restricting portion 72 of the front four-node link 50 is formed at the lower portion of the front side of the main link 61a.

The swing restricting portion 72 has a recess formed in the front portion of the upper link 61 of the rear four-bar link 60, and the connecting rod 55 fixed to the upper link 51 of the front four-bar link 50 described later can swing in the recess. Arranged, the front four-bar link 50 is swingable in the vertical direction within the range of this recess. However, it is also possible to use a long hole instead of the concave portion. The lowermost position of the front four-bar link 50 when regulated by the swing restricting portion 72, that is, the angle of the upper link 51 and the lower link 52 with the crop divider 2 fully lowered is the inclination of the front rising. When a load is applied from the front, the upper link 51 and the lower link 52 rotate upward to release the impact load. In this way, as shown in FIGS. 6 (a) to 6 (b), the swing is allowed to swing within the range regulated by the swing restricting unit 72.

The lower link 62 is rotatably pivotally supported at the lower portion of the cutting portion mounting frame 31 by the support shaft 64 at the rear portion, and is rotatably supported at the lower portion of the front link 67 by the support shaft 66 at the front portion. It is rotatably supported by the rear support shaft 66 of the lower link 52 of the node link 50. The lower link 62 has substantially the same configuration as the upper link 61 due to the two main links and the reinforcing link, but it is also possible to configure the lower link 62 with a single link.

Then, the parallel link is configured by making the lengths of the upper link 61 and the lower link 62 the same, and the distance between the support shaft 63 and the support shaft 64 and the distance between the support shaft 65 and the support shaft 66 the same. There is. However, the distance between the support shaft 65 and the support shaft 66 may be shorter than the distance between the support shaft 63 and the support shaft 64 to form a trapezoidal link configuration, and the elevating range may be restricted. In this way, the rear four-barn link 60 forms a parallel link by the upper link 61 and the lower link 62, and can be raised and lowered by expanding and contracting the hydraulic cylinder 70, and can swing up and down within the range of the swing restricting portion 71. ..

The front four-section link 50 includes an upper link 51, a lower link 52, a support shaft 53.54, a front link 67, a weeding frame 2a, a support shaft 65.66, and the like. The front link 67 and the support shafts 65 and 66 are shared with the rear four-section link 60. The upper link 51 includes left and right link members 51a and 51a and a connecting rod 55 that connects the link members 51a and 51. The rear part of the upper link 51 is vertically swingably supported on the upper part of the front link 67 via the support shaft 65, and the front part of the upper link 51 is vertically swingable on the upper part of the weed frame 2a via the support shaft 53. It is supported by. The connecting rod 55 is swingably arranged in the recess of the swing restricting portion 72, and the vertical swingable range of the front four-node link 50 is restricted. It is also possible to regulate the ascending limit of the front four-node link 50 by bringing the connecting rod 55 of the lower link 52 into contact with the front surface of the front link 67.

The lower link 52 is composed of left and right link members 52a and 52a and a connecting rod 55, and has the same configuration as the upper link 51 to reduce costs as a common component. In this way, the front four-section link 50 forms a parallel link by the upper link 51 and the lower link 52, and swings the crop divider 2 as a raising device and the weeding tool 40 as a weeding portion up and down within a predetermined range. It is free. However, the front four-section link 50 can be a trapezoidal four-section link. In this way, in the front four-bar link 50 and the rear four-bar link 60, when the crop divider 2 is lowered and the lower end of the weeding portion is grounded, the support shaft 68 is a long hole in the swing control portion 71 due to its own weight. The support shaft 63 is located at the lowest position of the recess in the swing control section 72, and is within the regulation range of the swing control section 71 and 72 so that it can follow the unevenness of the ground. It is swingable. If the crop divider 2 is light and jumps during work, a weight may be attached to the weeding portion, or an urging member such as a spring may be attached and pressed downward.

As described above, the base cutter 3 as a cutting device, the front transport device 4 and the rear transport device 5 as transport devices for transporting the stems cut by the base cutter 3 in a sideways posture, and the stems transported by the transport device. A sugar cane harvester 1 provided with a chopping device 6 as a processing unit for cutting a trunk to a predetermined size, and a crop divider 2 as a raising device is raised and lowered at the front portion of the machine frame 30 via an elevating link mechanism 12. The elevating link mechanism 12 is configured to be possible, and the elevating link mechanism 12 is composed of a front four-bar link 50 and a rear four-bar link 60. Is freely attached to the rear four-bar link 60 within a predetermined angle regulated by the swing control unit 72, so that the elevating range can be expanded by the two front and rear four-bar links 50/60. When entering or leaving the field, loading or unloading on a truck, or when there is a large protrusion in the field, the crop divider 2 serving as a raising device has the weeding tool 40 placed at the front end on the ground. It is now possible to prevent damage by plunging into or Ayumi. Further, the front four-bar link 50 and the rear four-bar link 60 can be raised and lowered separately, and the height of the raising device can be moved up and down according to the working state.

Further, the front four-bar link 50 can be freely swung within a predetermined angle by the swing restricting portion 72, and the rear four-bar link 60 has a free swing range by the swing regulating portion 71 and a hydraulic cylinder 70 as an elevating means. Since it has a swing range due to expansion and contraction, both the front four-bar link 50 and the rear four-bar link 60 rotate upward when the push-up amount is large, even for obstacles higher than before. Avoidance operation is possible, and the range where interference does not occur can be expanded.

Further, when a backward load is input to the crop divider 2 serving as the raising device, the front four-node link 50 freely swings in the direction in which the crop divider 2 rises, so that the crop divider 2 is a convex portion of the field. In the order from FIG. 6 (a) to FIG. 6 (b) (c), the crop divider 2 swings freely at the swing control portions 72 and 71 to raise the crop divider 2 and escape upward without plunging into the convex portion. Therefore, it is possible to prevent damage to the raising device.

The weeding tool 40 is provided so as to project forward from the lower part of the crop divider 2, that is, the lower end of the weeding frame 2a. As shown in FIGS. 7 and 8, the weeding tool 40 is provided from a fixed weeding portion 41 attached to the lower end of the weeding frame 2a and a movable weeding portion 42 attached to the front portion of the fixed weeding portion 41. Become.

In the fixed weeding portion 41, the rear portion of the bottom plate 41a formed in a triangular shape in a plan view is fixed to the lower end of the weeding frame 2a, and the front portion of the bottom plate 41a has a semi-conical shape rising backward and spreading backward laterally. The guide surface 41b is formed, and the mounting groove portion 41c is formed in the front-rear direction in the front left and right center of the guide surface 41b. The mounting groove portion 41c is formed by firmly fixing two plates on the bottom plate 41a with a predetermined space between the left and right sides. A movable weeding portion 42 is vertically rotatably attached to the attachment groove portion 41c.

The movable weeding portion 42 is composed of a plate having a substantially triangular shape in a side view, and an inclined surface 42c is formed on the upper surface so that the rear is gradually raised, and the inclined surface 42c is the upper side of the mounting groove portion 41c of the fixed weeding portion 41. A support hole 42a is opened in the upper part of the front and rear halfway portion of the movable weeding portion 42, and the rotating shaft 43 is inserted into the plate of the support hole 42a and the mounting groove portion 41c to form the movable weeding portion. 42 is rotatably supported. The support hole 42a is formed to have a substantially triangular shape in a side view so that the front portion is widened in the vertical direction, and has play in a state of being supported by the rotating shaft 43. The rear portion of the movable weeding portion 42 is connected to the fixed weeding portion 41 by the positioning member 44. The positioning member 44 is configured to open when a load of a set value or more is applied from the front to the rear of the movable weeding portion 42.

In the present embodiment, the positioning member 44 is configured by opening a fixing hole 42b at the rear portion of the movable weeding portion 42, inserting a shear bolt into the fixing hole opened in the fixed weeding portion 41 and the fixing hole 42b. .. In this way, when a load equal to or greater than the set value is applied to the movable weeding portion 42 from the front, the shear bolt breaks and the movable weeding portion 42 becomes rotatable. The positioning member 44 is not limited to the shear bolt, and a convex portion such as a notch is formed in either the fixed weed portion 41 or the movable weed portion 42, and a concave portion that fits into the notch is formed in the other. By forming and urging with an urging member in the direction in which both are fitted, the fitting between the convex portion and the concave portion can be released when a load equal to or larger than a set value is applied.

In such a configuration, when a load equal to or greater than a set value is applied to the movable weeding portion 42 from the front, the shear bolt breaks and the movable weeding portion 42 moves to the rear as shown in FIG. In this state, the movable weeding portion 42 becomes rotatable by the rotating shaft 43. Next, since the tip of the movable weeding portion 42 is located below the rotating shaft 43, the movable weeding portion 42 rotates around the rotating shaft 43 so that the front portion is lowered due to the load, and the movable weeding portion 42 is moved. The bottom of the portion 42 abuts on the front lower portion 41d of the mounting groove portion 41c to stop. In this state, the inclined surface 42c at the upper front portion of the movable weeding portion 42 is a slope that rises forward. Therefore, when the weeding tool 40 comes into contact with an obstacle such as a convex portion, the movable weeding portion 42 rotates and is guided by the forward incline of the inclined surface 42c to raise the crop divider 2 which is a raising device. , The weed tool 40 is prevented from plunging into the convex portion and damaging the machine body.

As described above, it is a processing unit that cuts the cutting device, the transporting devices 4 and 5 that transport the stems cut by the cutting device in a sideways posture, and the stems and stems transported by the transporting devices 4 and 5 to a predetermined size. A sugar cane harvester 1 provided with a chopping device 6, a crop divider 2 serving as a raising device is arranged on the front portion of the machine frame 30 so as to be able to move up and down, and a guide surface rising backward is provided at the front end of the crop divider 2. The weeding tool 40 to be provided is provided, and the weeding tool 40 is composed of a movable weeding portion 42 on the front side and a fixed weeding portion 41, and the movable weeding portion 42 has a front end lowered about a rotation shaft 43. Since it is configured to rotate, when a load is applied to the front end of the weed tool 40, the movable weed portion 42 rotates downward, and it is possible to avoid applying a large load to the crop divider 2.

Since the movable weeding portion 42 is fixed to the fixed weeding portion 41 so as not to rotate until a load equal to or more than a set value is applied by the positioning member 44, the movable weeding portion 42 is fixed to the fixed weeding portion 41 during normal work. And the fixed weeding portion 41 can be integrally weeded and guided.

Further, the movable weeding portion 42 is connected to the fixed weeding portion 41 by the rotating shaft 43 and the positioning member 44, and when a load equal to or higher than the set value is applied, the positioning member 44 is opened, which is an obstacle. The placement member 44 is opened against an abnormal load that collides with an object, and the movable weeding portion 42 rotates about the rotation shaft 43, so that the impact can be reduced.

Since the movable weeding portion 42 has an inclined surface 42c that descends backward after rotation, when the movable weeding portion 42 collides with an obstacle, the movable weeding portion 42 rotates and rides on the obstacle by the inclined surface 42c and weeds. It is possible to prevent the tool 40 from being damaged by plunging into an obstacle.

1 Sugar cane harvester 2 Crop divider 3 Base cutter 4 Front transfer device 5 Rear transfer device 6 Chopping device 12 Elevating link mechanism 30 Aircraft frame 50 Front four-section link 60 Rear four-section link 70 Hydraulic cylinder 71/72 Swing control unit

Claims (3)

It is a harvester equipped with a harvesting device, a transporting device that transports the stems cut by the cutting device in a sideways posture, and a processing unit that cuts the stems and stems transported by the transporting device to a predetermined size.
A raising device is placed on the front of the fuselage frame via a lift link mechanism so that it can be lifted and lowered.
The elevating link mechanism has a front link mechanism and a rear link mechanism.
The front link mechanism is attached to the rear link mechanism so as to be able to move up and down within a predetermined angle by a swing restricting portion.
Of the front link mechanisms, the link of the front link mechanism whose swing is regulated by the swing restricting portion shall be regulated by the swing regulating portion in a state of forward upward inclination when the link of the front link mechanism is at the lowermost position. A harvester featuring. The harvester according to claim 1, wherein the rear link mechanism is moved up and down by an elevating drive means. The front link mechanism and the rear link mechanism connect the same frame member, respectively.
The harvest according to claim 2, wherein the front link mechanism can freely swing within a predetermined angle, and the rear link mechanism has a free swing range and a swing range by the elevating drive means. Machine.

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