JP2020072749A - Harvester - Google Patents

Abstract

To provide a harvester capable of securing a sufficient rise amount of a pick-up device, and not interfering with a ground surface and a vehicle support base.SOLUTION: A harvester includes: a reaping device; a transportation device transporting stems reaped with the reaping device in a fallen-down attitude; and a processing part for cutting in a predetermined dimension the stems transported with the transportation device. A pick-up device is liftably disposed in the front part of a machine body frame via a lifting link mechanism. The lifting link mechanism is composed of a front link mechanism and a rear link mechanism, the rear link mechanism is lifted by lifting driving means, and the front link mechanism is mounted liftably to the rear link mechanism in a predetermined angle.SELECTED DRAWING: Figure 3

Description

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

  Conventionally, a sugarcane harvester in which the raising device is supported by an elevating device including a front link mechanism and a rear link mechanism, the front link mechanism elevates and lowers the raising device, and the rear link mechanism allows the sugarcane harvester to move back and forth has been known. (See, for example, Patent Document 1).

Japanese Utility Model Publication No. 58-161425

  However, in the case of the technique disclosed in Patent Document 1, the raising / lowering 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 elevating device is supported by an elevating link mechanism composed of a front link mechanism and a rear link mechanism so that the elevating mechanism can be moved up and down, and the rear link mechanism is moved up and down by the elevating drive means so that the front link mechanism becomes the rear link mechanism within a predetermined angle. The above-mentioned inconvenience is solved by adopting a structure that can be mounted so as to move up and down. As a result, a sugar cane harvester that ensures a sufficient amount of rise and that the raising device does not interfere with the ground or Ayumi is provided.

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below.
That is, according to claim 1, the harvester comprises a mowing device, a carrying device for carrying the stems cut by the mowing device in a horizontal posture, and a processing section for cutting the stems carried by the carrying device into predetermined dimensions. In addition, the raising device is arranged at the front part of the machine body frame so as to be able to move up and down via an elevating link mechanism.

3. The lift link mechanism according to claim 2, wherein the lift link mechanism includes a front link mechanism and a rear link mechanism, the rear link mechanism is lifted and lowered by a lift drive unit, and the front link mechanism is within the predetermined angle. It is attached so that it can be moved up and down.
In claim 3, the front link mechanism and the rear link mechanism are connected to the same frame member, respectively, the front link mechanism is freely swingable within a predetermined angle, and the rear link mechanism is freely swingable. It has a moving range and a swinging range by the lifting drive means.

The effects of the present invention are as follows.
According to the present invention, the front portion 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 on a truck.

  Also, since the same frame member is shared, when the raising device receives a load from the front, the load after the front link mechanism reaches the upper limit of the ascending / descending range passes through the same frame member to the rear link mechanism. Therefore, the load that cannot be avoided by the front link mechanism can be avoided by the free swing of the rear link mechanism.

The side view which showed the whole structure of the sugar cane harvester. The front view which showed the whole structure of the sugar cane harvester. The side view of a raising device and a raising / lowering link mechanism. FIG. 3 is a perspective view of a raising device and a lifting link mechanism. The side view of the main link. The figure which shows the free rocking | fluctuation range by a front four-bar link and a rear four-bar link. Side view of the weeding tool. The perspective view of a weeding tool.

  First, an overall structure of an embodiment in which the harvester is a sugarcane harvester 1 will be described with reference to FIGS. 1 and 2. It should be noted that the description will be given by defining the front-back direction with the F direction as the front. The sugarcane harvesting machine 1 supports a machine body frame 30 on a crawler type traveling device 10 as a traveling unit, and a harvesting device, a conveying device, a processing unit, a wind selecting device 7 and a discharging unit 80 are attached to the machine body frame 30. Mowing part mounting frames 31 are vertically fixed to the left and right of the front part of the machine body frame 30, and the top cutter 17 is mounted on the upper part of the mowing part mounting frame 31 via a parallel link mechanism 32. A pair of left and right cropping dividers 2 are attached to 31 via a lifting link mechanism 12 which will be described later. The traveling unit may be a wheel type.

  Since the crop divider 2 is symmetrically configured, only one of the left and right will be described. The crop divider 2 has augers 2b and 2c arranged substantially parallel to the grass frame 2a and rotatably supported at the front of the grass frame 2a which is tilted rearward, and is provided above the grass frame 2a. The hydraulic motors 2d and 2e are driven. A weeding tool 40 having a substantially triangular shape in a side view is provided so as to project from the lower portion of the weeding frame 2a to the front. In this way, it pulls into the plane while causing sugar cane.

  The top cutter 17 is vertically movable above and below the crop divider 2, and the parallel link mechanism 32 is vertically movable by expanding and contracting a hydraulic cylinder. The top cutter 17 is provided with a cutting blade at the lower left and right center, and is provided with a guide rod 33, a guide plate 34, and the like protruding from the left and right sides of the cutting blade to the left and right outward so as to bring the upper part of the sugar cane toward the left and right center. In this way, the unnecessary leaf portion of the upper part of the sugar cane is brought close to the left and right center of the machine body and cut by the cutting blade.

  A scraping rotor 13, a base cutter 3 serving as a reaping device, and a front transport device 4 are supported by a front transport frame 14 behind the left and right crop dividers 2. A pair of left and right front transport frames 14 are provided, and a rear portion of the front transport frame 14 is pivotally supported at the front end position of the rear transport device 5 so as to be vertically rotatable on the machine frame 30. A hydraulic cylinder is provided between the front portion of the front transport frame 14 and the machine body frame 30. By expanding and contracting the hydraulic cylinder, the base cutter 3 and the scraping rotor 13 can be moved up and down to adjust the height. There is.

  The base cutters 3 are fixed to the left and right support cylinders 3a and 3a vertically extending from the front portion of the front transport frame 14 and a plurality of fixedly mounted outer circumferences of support disks fixed to the lower ends of the support cylinders 3a and 3a. , Cutting blades 3b, 3b, ..., Rod-shaped spirals 3c, 3c fixedly mounted on the support disk, hydraulic motors for rotationally driving the cutting blades 3b and 3c, and the like. The take-in rotor 13 is composed of a rotary shaft having a shaft center in the left-right direction and rotatably supported at the front ends of the left and right front transport frames 14, and a blade body fixedly mounted on the rotary shaft. The rotary shaft is rotationally driven by a hydraulic motor.

  The front conveying device 4 has a pair of upper and lower feed rollers having a shaft center in the left-right direction and arranged in the front-rear direction. Both sides of the roller shaft of the feed roller are rotatably supported by the left and right conveying cases, and the upper roller. The shaft is configured to be capable of transmitting power by a chain, and the lower roller shaft is configured to be capable of transmitting power by a gear, and each roller shaft is connected to a hydraulic motor.

  Thus, the rotation of the scraping rotor 13 scrapes the sugarcane stem and the root of the plant is cut by the rotation of the cutting blades 3b and 3b of the base cutter 3, and at the same time, the rotation of the spirals 3c and 3c causes the lower end of the stem ( The root) is flipped up. The sugar cane that has been flipped up is drawn from the root into the front transport device 4 arranged immediately after that, and is fed obliquely rearward and upward by the feed roller of the front transport device 4.

  The rear part of the front transport device 4 is located at the front part of the rear transport device 5. The post-conveying device 5 is composed of a roller type conveyor which sends the rearward with an appropriate interval between the upper side and the lower side. In this way, the sugar cane after being cut by the base cutter 3 is sent to the rear by the front transport device 4, inherited by the rear transport device 5, and transported obliquely rearward and upward. Thus, the front transport device 4 and the rear transport device 5 form a transport device.

  A chopping device 6 serving as a processing unit is arranged at the rear 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 having an axial center in the left-right direction, so that when the sugar cane passes between the rotating upper and lower blade blades, it is cut to a predetermined size and blown backward. There is.

  The wind selecting device 7 includes a blower case 7a provided on the upper rear 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 communicates with the chopping device 6, and the upper side serves as a discharge port for leaves and dust. The blower case 7a is rotatable around a vertical axis, and the discharge direction can be changed. The blower is housed in the blower case 7a with the vertical direction as an 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 are cut. The dust and the dust are sucked upward so that the dust can be discharged laterally or backward, and the heavy stem falls onto the hopper 18 provided at the lower part of the lower discharge conveyor 8.

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

  A control section is arranged on the front left and right center of the body frame 30, and the control section is covered by a cabin 19. A seat, a steering wheel, a gear shift lever, and the like are arranged in the cabin 19. An engine serving as a drive source is disposed above the front transport device 4 behind the cabin 19, and a hydraulic pump for operating a hydraulic motor for traveling and driving the transport device, a hydraulic cylinder for raising and lowering, etc. is provided in the engine. Are connected and driven.

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

  The upper link 61 is composed of main links 61a and 61a, a reinforcing link 61b, and a connecting rod 61c, and a rear portion of the upper link 61 is rotatably supported by an upper portion of the mowing portion mounting frame 31 via a support shaft 63. The front portion of the upper link 61 is rotatably supported on the upper portion of the front link 67 via a support shaft 65, and the rear portion of the upper link 51 of the front four-joint 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 upper front part of the upper link 61 via a support shaft 68. A swinging restricting portion 71 of the rear four-bar link 60 is arranged at the tip of the hydraulic cylinder 70, and the other end is pivotally supported at the lower portion of the mowing portion mounting frame 31. In the rocking | fluctuation control part 71, in this embodiment, a long hole is formed in parallel with the expansion-contraction direction at the rod tip, and the said support shaft 68 penetrates this long hole, and it is slidable in a long hole. In this way, the rear four-bar link 60, that is, the crop divider 2 that serves as a weeding device is vertically swingable within the elongated hole that serves as the swing restricting portion 71. Thus, 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. 6B to 6C, the rocking is allowed within a range regulated by the rocking regulating portion 71.

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

  The rocking | fluctuation control part 72 has a recessed part formed in the front part of the upper link 61 of the rear four-bar link 60, and the connection rod 55 fixed to the upper link 51 of the front four-bar link 50 mentioned later can rock | fluctuate in this recessed part. The front four-joint link 50 is arranged so as to be vertically swingable within the range of the recess. However, it is also possible to use a long hole instead of the recess. The lowermost end position of the front four-joint link 50 when restricted by the rocking restricting portion 72, that is, the angles of the upper link 51 and the lower link 52 when the crop divider 2 is in the lowest position are the same as the forward rising inclination. When the load is applied from the front side, the upper link 51 and the lower link 52 rotate upward to release the impact load. In this way, as shown in FIGS. 6A and 6B, the rocking member 72 is allowed to rock within the range regulated by the rocking regulating portion 72.

  A rear portion of the lower link 62 is rotatably supported by a lower portion of the mowing portion mounting frame 31 by a support shaft 64, and a front portion thereof is rotatably supported by a lower portion of a front link 67 by a support shaft 66. The lower link 52 of the node link 50 is rotatably supported by a rear support shaft 66. The lower link 62 has two main links and a reinforcing link and has substantially the same structure as the upper link 61, but it is also possible to form one link.

  Then, the upper link 61 and the lower link 62 have the same length, and the support shaft 63 and the support shaft 64 and the support shaft 65 and the support shaft 66 have the same length to form a parallel link. There is. However, the distance between the support shaft 65 and the support shaft 66 may be made shorter than the distance between the support shaft 63 and the support shaft 64 to form a trapezoidal link structure, and the lifting range may be restricted. In this way, the rear four-bar link 60 constitutes a parallel link by the upper link 61 and the lower link 62, and can be lifted and lowered by expanding and contracting the hydraulic cylinder 70, and can be vertically swung within the range of the swing restriction portion 71. ..

  The front four-section link 50 includes an upper link 51, a lower link 52, support shafts 53 and 54, a front link 67, a weeding frame 2a, support shafts 65 and 66, and the like. The front link 67 and the support shafts 65 and 66 are shared with the rear four-bar link 60. The upper link 51 includes left and right link members 51a, 51a and a connecting rod 55 that connects the link members 51a, 51. The rear part of the upper link 51 is supported on the upper part of the front link 67 so as to be vertically swingable via a support shaft 65, and the front part of the upper link 51 is vertically swingable on the upper part of the weeding frame 2a via the support shaft 53. Be pivoted to. 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-joint link 50 is restricted. The upper limit of the front four-joint link 50 can be regulated by causing the connecting rod 55 of the lower link 52 to contact the front surface of the front link 67.

  The lower link 52 is composed of left and right link members 52a, 52a and a connecting rod 55, has the same configuration as the upper link 51, and is a common component for cost reduction. Thus, the front four-joint link 50 constitutes a parallel link by the upper link 51 and the lower link 52, and the crop divider 2 as the raising device and the weeding tool 40 as the weeding part are vertically swung within a predetermined range. I am free. However, the front four-bar link 50 may be a trapezoidal four-bar link. As described above, in the front four-section link 50 and the rear four-section link 60, in the state where the crop divider 2 is lowered and the lower end of the weeding section is grounded, the support shaft 68 is elongated in the rocking restricting section 71 due to its own weight. The support shaft 63 is located at the lowest position of the recess in the rocking restricting portion 72, so that it can follow the unevenness of the ground within the restriction range of the rocking restricting portions 71, 72. It is swingable. When the crop divider 2 is light and jumps at the time of work, a weight may be attached to the weeding portion, or a biasing member such as a spring may be attached to press down.

  As described above, the base cutter 3 that serves as a cutting device, the front transport device 4 and the rear transport device 5 that serve as a transport device that transports the stem trunk cut by the base cutter 3 in a sideways posture, and the stem transported by the transport device. A sugarcane harvester 1 including a chopping device 6 that serves as a processing unit that cuts a trunk into a predetermined size. A crop divider 2 that serves as a lifting device is lifted up and down via a lifting link mechanism 12 at the front of a machine body frame 30. The lifting and lowering link mechanism 12 is configured to include a front four-joint link 50 and a rear four-joint link 60, and the rear four-joint link 60 is lifted and lowered by a hydraulic cylinder 70 serving as a lifting and lowering drive unit. Is attached to the rear four-bar link 60 so as to be able to move up and down within a predetermined angle regulated by the rocking restricting portion 72. The descending range can be expanded, and the crop divider 2 that is the raising device is placed at the front end when entering or exiting the field, when loading or unloading on a truck, or when there is a large convex part in the field. It has become possible to prevent the grass weeding tool 40 from being crushed by being stuck on the ground or Ayumi. Further, the front four-section link 50 and the rear four-section 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-joint link 50 can freely swing within a predetermined angle by a swing restricting portion 72, and the rear four-joint link 60 allows a free swing range by the swing restricting portion 71 and a hydraulic cylinder 70 serving as an elevating means. When the push-up amount is large, both the front four-joint link 50 and the rear four-joint link 60 rotate upward, and even for obstacles or the like that are higher than conventional ones. The avoidance operation becomes possible, and the range where interference does not occur can be expanded.

  Further, when a rearward 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 causes the convex portion of the field. 6 (a) to 6 (b) (c), the swing dividers 72 and 71 freely swing and the crop divider 2 is lifted to escape upward without thrusting into the convex portion. Therefore, damage to the pulling device can be prevented.

  A weeding tool 40 is provided so as to project forward from the lower portion 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 includes a fixed weeding section 41 attached to the lower end of the weeding frame 2a and a movable weeding section 42 attached to the front of the fixed weeding section 41. Become.

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

  The movable weeding section 42 is formed of a plate having a substantially triangular shape in a side view, and an upper surface is formed with an inclined surface 42c so that the rear is gradually raised, and the inclined surface 42c is the upper side of the mounting groove section 41c of the fixed weeding section 41. The movable grass part 42 is formed with a supporting hole 42a in the upper part of the front and rear part of the movable grass part 42, and the rotary shaft 43 is inserted into the plate of the supporting hole 42a and the mounting groove part 41c. 42 is rotatably supported. The supporting hole 42a is formed in a substantially triangular shape in a side view so that the front portion is wide in the vertical direction, and has a play in a state of being supported by the rotating shaft 43. The rear part of the movable weeding part 42 is connected to the fixed weeding part 41 by a positioning member 44. The positioning member 44 is configured to open when a load equal to or larger than a set value is applied to the movable weed part 42 from the front to the rear.

  In the present embodiment, the positioning member 44 is configured by opening a fixed hole 42b in the rear part of the movable weeding part 42 and inserting shear bolts in the fixing hole opened in the fixed weeding part 41 and the fixing hole 42b. .. Thus, 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 is broken and the movable weeding portion 42 is made rotatable. The positioning member 44 is not limited to the shear bolt, and a convex portion such as a notch is formed on either the fixed weeding portion 41 or the movable weeding portion 42, and a concave portion that fits into the notch is formed on the other. It is also possible to configure so that the convex portion and the concave portion are opened to each other when a load equal to or larger than a set value is applied by forming the two members and urging them with a urging member in a direction in which they are fitted to each other.

  In such a configuration, when a load equal to or larger than the set value is applied to the movable weeding section 42 from the front, the shear bolt breaks, and the movable weeding section 42 moves rearward as shown in FIG. 7. In this state, the movable weeding part 42 is rotatable by the rotating shaft 43. Next, since the tip of the movable weeding part 42 is located below the rotating shaft 43, the movable weeding part 42 is rotated about the rotating shaft 43 so that the front part is lowered by the load, and the movable weeding part 42 is moved. The bottom of the portion 42 comes into contact with the front lower portion 41d of the mounting groove portion 41c to stop. In this state, the inclined surface 42c at the upper front part of the movable weeding part 42 is an upwardly inclined surface. Therefore, when the weeding tool 40 comes into contact with an obstacle such as a convex portion, the movable weeding portion 42 is rotated and guided by the forwardly rising inclination of the inclined surface 42c, and the crop divider 2 serving as a raising device is raised. The weeding tool 40 is prevented from sticking to the convex portion and damaging the machine body.

  As described above, the reaping device serves as a conveyor device 4 and 5 that conveys the stem and stem cut by the reaper in a horizontal position, and a processing unit that cuts the stem and stem conveyed by the conveyor device 4 and 5 into a predetermined size. In the sugar cane harvester 1 including the chopping device 6, a crop divider 2 serving as a raising device is arranged to be movable up and down at the front part of the machine body frame 30, and a rearward rising guide surface is provided at the front end of the crop divider 2. A weeding tool 40 having is provided, and the weeding tool 40 comprises a movable side weeding part 42 and a fixed weeding part 41 on the front side, and the movable weeding part 42 has its front end lowered around a rotation shaft 43. Since it is configured to rotate, it is possible to avoid that the movable grass portion 42 rotates downward when a load is applied to the front end of the weeding tool 40 and a large load is applied to the crop divider 2.

  The movable weeding part 42 is fixed to the fixed weeding part 41 so as not to rotate until a load equal to or more than a set value is applied by the positioning member 44, so that the movable weeding part 42 is normally operated. The fixed weeding part 41 and the fixed weeding part 41 can integrally weed and guide.

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

  Since the movable weeding part 42 has an inclined surface 42c descending rearward at the bottom after rotation, when colliding with an obstacle, the movable weeding part 42 rotates and rides on the obstacle by the inclined surface 42c. It is possible to prevent the tool 40 from sticking to an obstacle and being damaged.

1 Sugar cane harvester 2 Crop divider 3 Base cutter 4 Front transport device 5 Rear transport device 6 Chopping device 12 Lifting link mechanism 30 Airframe frame 50 Front four-joint link 60 Rear four-joint link 70 Hydraulic cylinder 71/72 Swing restricting unit

Claims (3)

A harvester comprising a mowing device, a carrying device for carrying the stem and stem cut by the cutting device in a horizontal posture, and a processing section for cutting the stem and trunk carried by the carrying device into a predetermined size,
The harvester is characterized in that the raising device is arranged so as to be able to move up and down via a lifting link mechanism at the front of the machine frame. The lifting link mechanism is composed of a front link mechanism and a rear link mechanism,
The rear link mechanism is lifted and lowered by a lifting drive means,
The harvester according to claim 1, wherein the front link mechanism is attached to the rear link mechanism so as to be movable up and down within a predetermined angle. The front link mechanism and the rear link mechanism respectively connect the same frame member,
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 and lowering drive means. Machine.

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