CN109922654B

CN109922654B - Harvester

Info

Publication number: CN109922654B
Application number: CN201780053145.XA
Authority: CN
Inventors: 福元健氏; 北冈治正
Original assignee: Yanmar Power Technology Co Ltd
Current assignee: Yanmar Power Technology Co Ltd
Priority date: 2016-11-16
Filing date: 2017-11-14
Publication date: 2022-07-08
Anticipated expiration: 2037-11-14
Also published as: JP2018078834A; CN109922654A; JP6662756B2; WO2018092764A1

Abstract

Provided is a sugarcane harvester (1) which can ensure a sufficient lifting amount of a lifting device and does not interfere with the ground and a loading platform. The stalk cutter is provided with a bottom cutter (3) as a cutting device, a front conveying device (4) and a rear conveying device (5) as conveying devices for conveying stalks cut by the bottom cutter (3) in a horizontal posture, and a chopping device (6) as a processing part for cutting the stalks conveyed by the conveying devices with a specified size, wherein a stalk separator (2) as a lifting device is arranged at the front part of a machine body frame (30) in a lifting way through a lifting link mechanism (12), the lifting link mechanism (12) is composed of a front four-section connecting rod (50) and a rear four-section connecting rod (60), the rear four-section connecting rod (60) is lifted and lowered by a hydraulic cylinder (70) as a lifting driving mechanism, and the front four-section connecting rod (50) is installed: freely moves up and down relative to the rear four-joint link (60) within a predetermined angle limited by the swing limiting part (72).

Description

Harvester

Technical Field

The invention relates to a lifting device of a harvester, in particular to a lifting device which can enable the lifting device of a sugarcane harvester to swing freely in a wider range.

Background

Conventionally, there is known a sugar cane harvester configured such that a lifter is supported by a lifter including a front link mechanism and a rear link mechanism, the lifter can be lifted and lowered by the front link mechanism, and the lifter can be moved forward and backward by the rear link mechanism (for example, see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Sho-58-161425

Disclosure of Invention

However, in the case of the technique of patent document 1, the lifting height of the lifter is insufficient, and the lifter may interfere with a loading platform (アユミ) and the floor surface when the lifter is loaded on or removed from the truck.

Therefore, the raising device is supported to be able to ascend and descend by a lifting link mechanism including a front four-link and a rear four-link, and the rear four-link is lifted and lowered by a lifting drive mechanism, and the front four-link is attached to: within a predetermined angle, the rear four-joint link can be freely lifted and lowered, thereby eliminating the above-mentioned disadvantages.

Accordingly, the present invention is intended to provide a sugar cane harvester capable of ensuring a sufficient amount of lift without the lifting device interfering with the ground and the loading table.

The problems to be solved by the present invention are as described above, and a method for solving the problems will be described below.

That is, according to claim 1, the sugar cane harvester includes: a cutting device; a conveying device for conveying the stalks cut off by the cutting device in a lying posture; and a processing unit configured to cut the stem conveyed by the conveyor in a predetermined size, wherein the raising device is disposed at a front portion of the body frame so as to be able to be raised and lowered via a lift link mechanism including a front four-link and a rear four-link, the rear four-link being raised and lowered by a lift drive mechanism, and the front four-link is attached to: can freely lift and descend relative to the rear four-section connecting rod within a specified angle.

In claim 2, the front four-link can freely swing within a predetermined angle, and the rear four-link has: a free swing range, and a swing range determined based on the lift mechanism.

In claim 3, in a case where a load in the rearward direction is input to the lifting device, the front four-link freely swings in a direction in which the lifting device rises.

ADVANTAGEOUS EFFECTS OF INVENTION

As the effects of the present invention, the following effects can be achieved.

That is, the raising device can expand the free swing range by the front four-link and the rear four-link, and when the harvester enters the field, leaves the field, or is loaded in the truck, the front portion of the raising device does not protrude into the field or the loading table but rises, so that the damage of the raising device can be prevented.

Drawings

Fig. 1 is a side view showing the overall structure of a sugar cane harvester.

Fig. 2 is a front view showing the overall structure of the sugar cane harvester.

Fig. 3 is a side view of the lifting device and lifting linkage.

Fig. 4 is a perspective view of the lift device and the lifting linkage.

Fig. 5 is a side view of the master link.

Fig. 6 is a diagram showing the free swing range of the front four-link and the rear four-link.

Fig. 7 is a side view of the seedling-dividing member.

Fig. 8 is a perspective view of the seedling separating member.

Detailed Description

First, the overall structure of the embodiment in which the harvester is the sugar cane harvester 1 will be described with reference to fig. 1 and 2. The F direction is defined as the front direction, and the front-rear direction is defined.

The machine frame 30 is supported by a crawler travel device 10 as a travel unit of the sugar cane harvester 1, and the harvesting device, the conveying device, the processing unit, the winnowing device 7, and the discharge unit 80 are attached to the machine frame 30. A harvesting unit mounting frame 31 is fixed to the left and right sides of the front portion of the machine body frame 30 in the vertical direction, the top cutter 17 is attached to the upper portion of the harvesting unit mounting frame 31 via a parallel link mechanism 32, and the stalk dividers (crop dividers) 2, 2 as a pair of left and right raising devices are attached to the harvesting unit mounting frame 31 via a lifting link mechanism 12 described later. The traveling unit may be of a pulley type.

Since the stem splitter 2 is configured to be symmetrical in the left-right direction, one of the left and right directions will be described. The stem divider 2 is composed of: the

augers

2b, 2c are rotatably supported by being disposed in the front of the seedling separating frame 2a so as to be substantially parallel to the seedling separating frame 2a disposed to be inclined rearward, and the

augers

2b, 2c are driven by

hydraulic motors

2d, 2e provided on the upper portion of the seedling separating frame 2 a. The seedling separating member 40, which is approximately triangular in side view, is provided to protrude forward from the lower part of the seedling separating frame 2 a. In this way, the cane can be pulled into the harvester while being lifted.

The top cutter 17 is disposed in the upper front of the stem divider 2 so as to be able to be raised and lowered, and the parallel link mechanism 32 is raised and lowered so as to be able to adjust the height by extending and contracting a hydraulic cylinder. The top cutter 17 includes a cutting edge at the center in the left-right direction of the lower portion, and includes: a guide rod 33, a guide plate 34, and the like protruding outward in the left-right direction so that the upper portion of the sugar cane approaches the center in the left-right direction from the left and right sides of the cutting blade. Thus, the unnecessary leaf part on the upper part of the sugarcane is close to the center of the machine body in the left-right direction, and the sugarcane is cut by the cutting blade.

The raking rotor 13, the bottom cutter 3 as a harvesting device, and the front conveyor 4 are supported by the front conveyor frame 14 at the rear between the left and

right stem dividers

2, 2. The front conveyance frame 14 is provided as a pair of left and right, and the rear part thereof is pivotally supported by the body frame 30 so as to be rotatable up and down at the front end position of the rear conveyance device 5. A hydraulic cylinder is installed between the front portion of the front conveyance frame 14 and the machine body frame 30, and the bottom cutter 3 and the raking rotor 13 can be raised and lowered by extending and contracting the hydraulic cylinder, thereby adjusting the height.

The bottom cutter 3 comprises: left and

right support cylinders

3a, 3a vertically provided downward from the front portion of the front conveyance frame 14, a plurality of

blades

3b, 3b … … fixedly provided on the outer periphery of a support disk fixedly provided at the lower end of the support cylinders 3a, rod-

like screws

3c, 3c fixedly provided on the support disk, and a hydraulic motor for rotationally driving the blades 3b and the screws 3 c.

The raking rotating member 13 includes: a turning shaft having an axis in the left-right direction and supported rotatably at the front ends of the left and right front conveyance frames 14, and a vane body fixed to the turning shaft, and the turning shaft is rotationally driven by a hydraulic motor.

The front conveyor 4 has an axis in the left-right direction, and a plurality of sets of upper and lower pair of conveying rollers are arranged in the front-rear direction, both sides of the roller shafts of the conveying rollers are rotatably supported by the left and right conveying boxes, and the upper roller shaft is configured to: the power transmission can be performed by a chain, and the lower roller shaft is configured as follows: the power transmission can be performed by a gear, and the hydraulic motor can be connected to each other.

In this way, the stalks of the sugar cane are raked by the rotation of the raking rotor 13, the plants are cut by the rotation of the

cutters

3b, 3b of the base cutter 3, and the lower ends (roots) of the stalks are sprung by the rotation of the

screws

3c, 3 c. The sprung-up cane is pulled from the roots into: the front conveyor 4 disposed immediately after the front conveyor 4 conveys the sheet material obliquely upward and rearward by the conveying rollers of the front conveyor 4.

The rear of the front conveyor 4 is located in front of the rear conveyor 5. The rear conveyor 5 is constituted by roller conveyors which convey the sheet rearward at appropriate intervals on the upper and lower sides thereof. The sugarcane cut by the bottom cutter 3 is then conveyed backward by the front conveyor 4, delivered to the rear conveyor 5, and conveyed obliquely backward and upward. In this way, the conveyor is constituted by the front conveyor 4 and the rear conveyor 5.

A shredder 6 as a processing unit is disposed at the rear of the rear conveyor 5. The shredding means 6 consists of knives. The cutter comprises the following components: blades are fixed to a pair of upper and lower tool shafts having axes in the left-right direction, and when sugar cane passes between the rotating upper and lower blades, the sugar cane is thrown backward while being cut by a predetermined size.

The winnowing device 7 includes: a blower case 7a provided at the rear upper portion of the shredder 6, and a blower housed in the blower case 7 a. The blower case 7a is opened at the lower and upper portions thereof, the lower portion of the blower case 7a is communicated with the shredder 6, and the upper portion thereof is provided with a discharge port for leaves, dust, etc. The blower case 7a can rotate about an axis in the vertical direction, and can change the discharge direction. The blower is housed in the blower case 7a with the vertical direction as the axis, and is rotationally driven to generate a high-speed air flow from the bottom to the top, and the high-speed air flow is diffused by the rotation of the diffusion rotating member, so that the fine cut leaves or dust can be sucked upward and discharged to the side or the rear, and the heavy stalks fall onto the hopper 18 provided at the lower part of the discharge conveyor 8 below.

The discharge conveyor 8 is supported by a swing table 20, a lower portion of the swing table 20 is provided at a rear portion of the body frame 30, and the swing table 20 is supported to be rotatable in the vertical direction as an axis and in the left-right direction. The structure is as follows: 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 body frame 30, but may be configured such that: the storage pocket is installed at the rear of the machine body frame 30 to store the dropped sugar cane.

A manipulation unit is disposed at the front left-right direction center of the body frame 30, and the manipulation unit is covered by the cab 19. A seat, a steering wheel, a shift lever, and the like are disposed in the cab 19. An engine as a driving source is disposed above the front conveyor 4 behind the cab 19, and a hydraulic pump for operating a hydraulic motor for driving the traveling and conveyor, a hydraulic cylinder for lifting, and the like is connected to the engine and driven.

The lifting link mechanism 12 includes: a pair of right and left front four-link rods 50, a pair of right and left rear four-link rods 60, and a hydraulic cylinder 70 as a lift drive mechanism. The lifter link mechanism 12 is configured to be bilaterally symmetrical, and therefore, the left side will be described. As shown in fig. 3 and 4, the rear four-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 includes: the main links 61a, the reinforcement link 61b, and the connecting link 61c are pivotally supported at the rear portion of the upper link 61 on the upper portion of the cutting portion attaching frame 31 via a support shaft 63 so as to be rotatable. The front portion of the upper link 61 is rotatably supported on the upper portion of the front link 67 via the support shaft 65, and the rear portion of the upper link 51 of the front four-link 50 is also rotatably supported on the upper portion of the front link 67. One end (rod tip in the present embodiment) of the hydraulic cylinder 70 is coupled to the front upper portion of the upper link 61 via a support shaft 68. The swing restricting portion 71 of the rear four-link 60 is disposed at the front end of the hydraulic cylinder 70, and the other end of the hydraulic cylinder 70 is pivotally supported on the lower portion of the cutting portion attaching frame 31. In the present embodiment, the pivot restricting portion 71 has a long hole formed in the tip end of the lever so as to be parallel to the telescopic direction, and the support shaft 68 is inserted through the long hole and is slidable in the long hole. In this way, the rear four-link 60, that is, the stem divider 2 as a seedling dividing device can freely swing up and down in the elongated hole as the swing restricting portion 71.

As shown in fig. 6(a), the stem divider 2 can be lifted and lowered greatly by extending and contracting the hydraulic cylinder 70. As shown in fig. 6(b) to 6(c), the swing restricting portion 71 is configured to swing freely within a range restricted by the swing restricting portion.

As shown in fig. 4 and 5, the front portion of the main link 61a is formed in a substantially triangular shape, and the rear portions of the left and right

main links

61a, 61a are formed with openings: support holes 61a1, 61a1 for inserting and fixedly supporting the bearing tube 69, a support shaft 63 is inserted into the bearing tube 69, and both sides of the support shaft 63 are connected to and supported by the cutting section attachment frame 31. At the front-rear direction middle portion of the main link 61a, there are formed: the fixing hole 61a2, into which the connecting rod 61c is inserted and fixed, has an opening at the front upper part, and is formed with: the support shaft 68 connected to the hydraulic cylinder 70 is inserted into the support hole 61a3 supporting it. In front lower portions of the left and right master links 61a, there are formed: and support holes 61a4, 61a4 into which the bearing tube 73 is inserted and fixed, wherein the support shaft 65 is inserted into the bearing tube 73, and the rear part of the upper link 51 is supported on both sides of the support shaft 65. At the lower part of the front edge of the main link 61a, there are formed: and a swing restricting portion 72 of the front four-link 50.

The swing restricting portion 72 is formed with a recess in a front portion of the upper link 61 of the rear four-link 60, and in the recess, there are arranged swingably: a connecting rod 55 fixed to an upper link 51 of a front four-link 50 described later, and the front four-link 50 is swingable in the vertical direction within the range of the concave portion. However, instead of the concave portion, a long hole may be provided. The lowermost end position of the front four-link 50 when being restricted by the swing restricting portion 72, that is, the angles of the upper link 51 and the lower link 52 at which the stem divider 2 descends to the lowermost state are set to: if a load is applied from the front, the upper link 51 and the lower link 52 are rotated upward, and the impact load can be released. Thus, as shown in fig. 6(a) to 6(b), the swing restricting portion 72 swings freely within a limited range.

The rear portion of the lower link 62 is pivotally supported by a support shaft 64 to be rotatable at the lower portion of the cutting portion mounting frame 31, the front portion of the lower link 62 is rotatably supported by a support shaft 66 at the lower portion of the front link 67, and the lower link 62 is rotatably supported by a rear portion support shaft 66 of the lower link 52 of the front four-link 50. The lower link 62 is formed substantially in the same manner as the upper link 61 by two main links and a reinforcing link, but may be formed by one link.

The upper link 61 and the lower link 62 are set to have the same length, and the interval between the support shaft 63 and the support shaft 64 and the interval between the support shaft 65 and the support shaft 66 are set to have the same length, thereby constituting a parallel link. However, the following configuration is also possible: the interval between the

support shafts

65 and 66 is shorter than the interval between the

support shafts

63 and 64, and thus a trapezoidal link structure is formed to limit the lifting range.

In this way, the rear four-link 60 is configured as a parallel link by the upper link 61 and the lower link 62, and the rear four-link 60 is vertically movable by extending and contracting the hydraulic cylinder 70, and is vertically swingable within the range of the swing restricting portion 71.

The front four-link 50 includes: an upper link 51, a lower link 52, supporting

shafts

53 and 54, a front link 67, a seedling dividing frame 2a, supporting

shafts

65 and 66, and the like. The front link 67 and the

support shafts

65, 66 are shared between the front four-link 50 and the rear four-link 60.

The upper link 51 includes: left and right link members 51a, and a connecting rod 55 for connecting the

link members

51a, 51 a. The rear portion of the upper link 51 is supported by the upper portion of the front link 67 via a support shaft 65 so as to be vertically swingable, and the front portion of the upper link 51 is pivotally supported by the upper portion of the seedling-dividing frame 2a via a support shaft 53 so as to be vertically swingable. The connecting rod 55 is disposed in a recess of the swing restricting portion 72 so as to be swingable, and the range in which the front four-link 50 can swing up and down is restricted. Further, the connecting link 55 of the lower link 52 can abut against the front surface of the front link 67, thereby restricting the rising limit of the front four-link 50.

The lower link 52 includes: the left and

right link members

52a, 52a and the connecting link 55 have the same configuration as the upper link 51, and can be reduced in cost as a common member. In this way, the front four-link 50 is constituted as a parallel link by the upper link 51 and the lower link 52, and can freely swing up and down the stalk cutter 2 as a lifting device and the stalk cutter 40 as a stalk-cutting portion within a predetermined range. However, the front four-link 50 may be formed as a trapezoidal four-link.

In this way, in the state where the stem divider 2 is lowered and the lower end of the seedling separating portion is in contact with the ground, the support shaft 68 is positioned at the maximum lowering position of the elongated hole by the weight of the front four-point link 50 and the rear four-point link 60, and the support shaft 63 is positioned at the maximum lowering position of the recessed portion by the swing restricting portion 72, and the front four-point link 50 and the rear four-point link 60 are freely swung within the restriction range of the

swing restricting portions

71 and 72 so as to follow the unevenness of the ground surface, by the swing restricting portion 71. Further, the following may be configured: when the stem divider 2 is slightly bounced up during the work, the weight is attached to the dividing portion or an urging member such as a spring is attached to press the stem divider downward.

As described above, the sugar cane harvester 1 includes: a base cutter 3 as a harvesting device, a front conveyor 4 and a rear conveyor 5 as a conveyor for conveying stalks harvested by the base cutter 3 in a lying posture, and a shredder 6 as a processing section for cutting the stalks conveyed by the conveyor by a predetermined size, wherein a stem divider 2 as a raising device is disposed at a front portion of a machine frame 30 so as to be able to be raised and lowered via a lift link mechanism 12, the lift link mechanism 12 is composed of a front four-link 50 and a rear four-link 60, the rear four-link 60 is raised and lowered by a hydraulic cylinder 70 as a lift drive mechanism, and the front four-link 50 is attached to: since the four-link mechanism can be freely lifted and lowered with respect to the rear four-link mechanism 60 within the predetermined angle limited by the swing limiting portion 72, the lifting range can be expanded by the two front and rear four-link mechanisms 50 and 60 as compared with the conventional one, and when entering a field, leaving a field, loading a truck, unloading a truck, or having a large convex portion in a field, it is possible to prevent: the stalk cutter 2 as the raising device may be damaged by the stalk cutter 40 disposed at the front end protruding into the ground or the charging stand. Further, the front four-link 50 and the rear four-link 60 can be lifted and lowered, respectively, and the height of the raising device can be varied up and down according to the working state.

The front four-link 50 is swingable within a predetermined angle by a swing restricting portion 72, and the rear four-link 60 includes: since the free swing range determined by the swing restricting portion 71 and the swing range determined by the expansion and contraction of the hydraulic cylinder 70 of the elevating mechanism are set, when the amount of protrusion is large, the front four-link 50 and the rear four-link 60 are rotated upward in both directions, and the avoidance operation can be performed more favorably than before even when the vehicle faces a higher obstacle or the like, and the range in which no disturbance occurs can be expanded.

Further, when a rearward load is input to the stem divider 2 as the raising device, the front four-link 50 swings freely in the direction in which the stem divider 2 rises, and therefore, if the stem divider 2 encounters a convex portion of a field, the stem divider 2 swings freely at the

swing restricting portions

72 and 71 in the order of fig. 6(a) to 6(b) and 6(c), and the stem divider 2 is raised, and retreats upward without protruding into the convex portion, whereby the raising device can be prevented from being damaged.

Moreover, a seedling separating member 40 is provided projecting forward from the lower part of the stem divider 2, that is, from the lower end of the seedling separating frame 2 a. As shown in fig. 7 and 8, the seedling dividing member 40 includes: a fixed dividing part 41 mounted on the lower end of the dividing frame 2a, and a movable dividing part 42 mounted on the front part of the fixed dividing part 41.

A rear portion of a bottom plate 41a of the fixed seedling-dividing section 41, which is formed in a triangular shape in plan view, is fixedly provided to a lower end of the seedling-dividing frame 2a, and a front portion of the bottom plate 41a is formed with: a guide surface 41b having a semicircular tapered shape, which is low in front and high in rear and laterally spreads rearward, and an attachment groove portion 41c is formed in the front portion of the center in the left-right direction of the guide surface 41b in the front-rear direction. The mounting groove portion 41c is formed by fixing the two plates to the bottom plate 41a with a predetermined distance therebetween in the left-right direction. The movable seedling dividing section 42 is attached to the attachment groove section 41c so as to be rotatable in the vertical direction.

The movable seedling-dividing section 42 is formed of a plate having a triangular shape in side view, and an inclined surface 42c is formed on the upper surface so as to be gradually raised rearward, and the inclined surface 42c is formed such that: a support hole 42a is formed in an upper opening of a middle part of the movable seedling-dividing section 42 in the front-rear direction in a shape corresponding to an upper side of the mounting groove section 41c of the fixed seedling-dividing section 41, and the rotary shaft 43 is inserted into the support hole 42a and a plate of the mounting groove section 41c to rotatably support the movable seedling-dividing section 42. The support hole 42a is formed such that: the front portion of the substantially triangular shape in side view is expanded in the vertical direction, and rattles while being supported by the rotary shaft 43. The rear part of the movable dividing part 42 is connected to the fixed dividing part 41 by the positioning member 44. The positioning member 44 is constituted by: the movable seedling-dividing section 42 is opened if a load equal to or greater than a set value is applied from the front to the rear.

In the present embodiment, the positioning member 44 is configured to: the fixing hole 42b is opened at the rear of the movable seedling-dividing portion 42, and a shear bolt is inserted into the fixing hole opened in the fixed seedling-dividing portion 41 and the fixing hole 42 b. In this way, if a load equal to or greater than the set value is applied to the movable dividing part 42 from the front, the shear bolt is broken and the movable dividing part 42 freely rotates. The positioning member 44 is not limited to a shear bolt, and may be configured to: a convex portion such as a groove is formed on one of the fixed seedling-dividing portion 41 and the movable seedling-dividing portion 42, a concave portion to be fitted into the groove is formed on the other, and a force is applied in a direction in which the convex portion and the concave portion are fitted by a force-applying member, and if a load equal to or greater than a set value is applied, the fitting of the convex portion and the concave portion is released.

In such a configuration, if a load equal to or greater than a set value is applied to the movable dividing part 42 from the front, the shear bolts are broken, and the movable dividing part 42 moves rearward as shown in fig. 7. In this state, the movable seedling-dividing section 42 is freely rotated by the rotating shaft 43. Next, since the tip end of the movable dividing portion 42 is located below the rotary shaft 43, the movable dividing portion 42 is rotated around the rotary shaft 43 so as to be lower in height and lower in height by the load, and is stopped by the bottom edge of the movable dividing portion 42 coming into contact with the front lower portion 41d of the attachment groove portion 41 c. In this state, the inclined surface 42c of the front upper portion of the movable dividing portion 42 is formed as an inclined surface having a high front and a low rear. Therefore, when the stalk divider 40 abuts against an obstacle such as a convex portion, the movable stalk divider 42 rotates and is guided by the inclination of the inclined surface 42c that is high in the front and low in the rear, and the stalk divider 2 as a raising device is raised, so that it is possible to prevent: the seedling separating piece 40 protrudes into the convex part to cause the damage of the machine body.

As described above, the sugar cane harvester 1 includes: a harvesting device, conveying

devices

4 and 5 for conveying the stalks harvested by the harvesting device in a horizontal posture, and a chopping device 6 as a processing part for cutting the stalks conveyed by the conveying

devices

4 and 5 by a predetermined size, wherein a stalk divider 2 as a lifting device is arranged at the front part of a machine body frame 30 in a lifting way, a stalk divider 40 with a guide surface which is high at the back and low at the front is arranged at the front end of the stalk divider 2, the stalk divider 40 comprises a movable stalk dividing part 42 and a fixed stalk dividing part 41 at the front side, and the movable stalk dividing part 42 is formed as: since the movable stalk cutter 42 rotates so as to descend with the rotation shaft 43 as the center, if a load is applied to the tip of the stalk cutter 40, the movable stalk cutter 42 rotates downward, and a large load can be prevented from being applied to the stalk cutter 2.

Since the movable dividing portion 42 is fixed to the fixed dividing portion 41 so as not to rotate until a load equal to or greater than a set value is applied thereto by the positioning member 44, the movable dividing portion 42 and the fixed dividing portion 41 can be integrally guided during normal operation.

The movable seedling-dividing section 42 is connected to the fixed seedling-dividing section 41 by the rotating shaft 43 and the positioning member 44, and if a load equal to or greater than a set value is applied, the positioning member 44 is in an open state, so that the positioning member 44 is opened against an abnormal load that collides with an obstacle, and the movable seedling-dividing section 42 can rotate about the rotating shaft 43, and thus the impact can be reduced.

Since the movable seedling dividing section 42 has the inclined surface 42c which is high in the front and low in the rear after rotating at the lower portion, the movable seedling dividing section 42 rotates when colliding with an obstacle, and passes over the obstacle by the inclined surface 42c, so that it is possible to prevent: the seedling separating part 40 enters into the obstacle to cause the breakage.

Possibility of industrial utilization

The invention can be used as a harvester for harvesting sugar cane.

Description of the symbols

1 sugarcane harvester

2 Stem divider

3 bottom cutter

Front 4 conveying device

5 rear conveying device

6 shredding device

12 lifting connecting rod mechanism

30 machine body frame

Four-section connecting rod in front of 50

60 rear four-section connecting rod

70 hydraulic cylinder

71. 72 swing restricting part

Claims

1. A harvester, which is provided with: a cutting device; a conveying device for conveying the stalks cut off by the cutting device in a lying posture; and a processing part for cutting the stalks conveyed by the conveying device with a predetermined size,

the lifting device is configured at the front part of the machine body frame in a lifting way through a lifting connecting rod mechanism,

the lifting connecting rod mechanism consists of a front four-section connecting rod and a rear four-section connecting rod,

the rear four-section connecting rod is lifted through the lifting driving mechanism,

the front four links are mounted: can freely lift and fall relative to the rear four-section connecting rod within a specified angle,

the front four-section connecting rod is provided with a1 st upper connecting rod and a1 st lower connecting rod, the rear four-section connecting rod is provided with a2 nd upper connecting rod and a2 nd lower connecting rod,

a rear portion of the 1 st upper link is rotatably supported at an upper portion of a front link via a1 st support shaft, a front portion of the 2 nd upper link is rotatably supported at an upper portion of the front link via the 1 st support shaft, a rear portion of the 1 st lower link is rotatably supported at a lower portion of the front link via a2 nd support shaft, and a front portion of the 2 nd lower link is rotatably supported at a lower portion of the front link via the 2 nd support shaft.

2. A harvester according to claim 1,

the front four-section connecting rod can freely swing within a specified angle,

the rear four-section connecting rod is provided with: a free swing range, and a swing range determined based on the lift mechanism.

3. A harvester according to claim 1 or 2,

in the case where a load in the rearward direction is input to the lifting device, the front four-link freely swings in the direction in which the lifting device rises.