CN216314018U

CN216314018U - Cutting device and harvester

Info

Publication number: CN216314018U
Application number: CN202122405824.5U
Authority: CN
Inventors: 武靖元
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-19
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a cutting device and a harvester, wherein the cutting device comprises a transmission shaft assembly, an upper blade assembly and a lower blade assembly, wherein the upper blade assembly and the lower blade assembly are both connected to the transmission shaft assembly, and are stacked up and down along the axial direction of the transmission shaft assembly; the transmission shaft assembly drives the upper blade assembly and the lower blade assembly to rotate along the plane where the upper blade assembly and the lower blade assembly are located, and the rotating directions of the upper blade assembly and the lower blade assembly are opposite; the upper blade assembly comprises a plurality of upper blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the lower blade assembly comprises a plurality of lower blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the edge surface of the upper blade and the edge surface of the lower blade are oppositely arranged. According to the cutting device and the harvester provided by the utility model, the cutting mode is shearing cutting, so that the reliability of cutting the coarse stalk crops and the high stalk crops can be improved.

Description

Cutting device and harvester

Technical Field

The utility model belongs to the technical field of agricultural operation machinery, especially, relate to a cutting device and harvester.

Background

The harvester is an agricultural operation machine which is quite common in the application of the agricultural mechanized operation at present, and is popular with farmers because the operation efficiency is high, and the labor intensity of harvesting by adopting the harvester is far less than that of manual harvesting.

It is important that the harvester comprises a number of parts, wherein the cutting device takes the first step of the mechanized harvesting. At present, a cutting device of a harvester realizes sliding cutting on stalks by utilizing the high-speed rotating linear speed of a blade to cut the stalks, or applies impact collision on the stalks to make the stalks break brittle and break, thereby completing cutting operation.

However, when the existing cutting device is used for cutting thick-stalk crops and high-stalk crops, the problems of continuous cutting and easy winding can occur, and the cutting reliability is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a cutting device and a harvester so as to improve the reliability of cutting of thick-stalk and high-stalk crops.

The utility model provides a cutting device, which comprises a transmission shaft assembly, an upper blade assembly and a lower blade assembly, wherein the upper blade assembly and the lower blade assembly are both connected to the transmission shaft assembly, and are stacked up and down along the axial direction of the transmission shaft assembly; the transmission shaft assembly drives the upper blade assembly and the lower blade assembly to rotate along the plane where the upper blade assembly and the lower blade assembly are located, and the rotating directions of the upper blade assembly and the lower blade assembly are opposite; the upper blade assembly comprises a plurality of upper blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the lower blade assembly comprises a plurality of lower blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the edge surface of the upper blade and the edge surface of the lower blade are oppositely arranged.

According to the cutting device provided by the utility model, the upper blade assembly and the lower blade assembly are arranged in a vertically stacked mode along the axial direction of the transmission shaft assembly, the blade surface of the upper blade assembly and the blade surface of the lower blade assembly are oppositely arranged, and the transmission shaft assembly is arranged to drive the upper blade assembly and the lower blade assembly to rotate in opposite directions, so that the upper blade and the lower blade move oppositely to carry out shearing action. The blade of shearing motion can exert opposite direction's horizontal external force to the stem stalk, makes the stem stalk cross section take place the dislocation along external force direction and warp and fracture, only applys unilateral horizontal external force to the stem stalk than current cutting device, leans on stem stalk inertia and the unilateral horizontal external force to confront, makes the stem stalk cross section take place to warp and fracture along external force direction, and the cutting mode of this device makes the stem stalk change the fracture, has improved the reliability of cutting.

In one implementation, the plurality of upper blades and the plurality of lower blades are evenly spaced, and the number of upper blades and lower blades is equal. The uniform interval sets up the stem stalk that can guarantee the interval homoenergetic between the blade and hold down the crop to leave certain sword distance of waving.

In one implementation, the cutting edge surfaces of the upper blade and the lower blade are mutually matched bevels, the cutting edge surfaces of the upper blade being inclined towards the lower blade and the cutting edge surfaces of the lower blade being inclined towards the upper blade. The upper and lower blade surfaces are mutually matched inclined surfaces, so that the distance between reverse transverse external forces applied to the stalks can be reduced, and the shearing reliability is improved.

In one implementation, the transmission shaft assembly comprises a first transmission shaft and a second transmission shaft, the first transmission shaft is sleeved outside the second transmission shaft, the upper blade assembly is connected to the first transmission shaft, and the lower blade assembly is connected to the second transmission shaft; wherein, first transmission shaft and second transmission shaft are all rotatory along the axial of self, and the direction of rotation of first transmission shaft and second transmission shaft is opposite.

In one implementation mode, the upper blade assembly further comprises an upper blade holder, the upper blade holder is connected to the outer wall of the first transmission shaft, the upper blades are mounted on the upper blade holder, and the upper blades are arranged at intervals along the circumferential direction of the upper blade holder; the lower blade assembly further comprises a lower blade holder, the lower blade holder is connected to the outer wall of the second transmission shaft, the lower blades are installed on the lower blade holder, and the plurality of lower blades are arranged at intervals along the circumferential direction of the lower blade holder. The cutter holder rotates a week and can realize cutting many times to when guaranteeing the rotational speed, improve cutting efficiency.

In one implementation, a rotary support is arranged between the upper tool apron and the lower tool apron. The rotary support can enable the reverse rotation between the upper cutter holder and the lower cutter holder to be smoother, and the loss can be reduced.

In one implementation mode, the reversing gear mechanism further comprises a coaxial gear reverser, the coaxial gear reverser is connected to the end portion of the transmission shaft assembly, and the coaxial gear reverser drives the first transmission shaft and the second transmission shaft to rotate reversely.

In one implementation, a coaxial gear commutator includes an input bevel gear, an inner output bevel gear, an outer output bevel gear, an input shaft, an inner output shaft, and an outer output shaft; the outer output shaft is sleeved outside the inner output shaft, the input shaft is vertically arranged on the side of the middle part of the outer output shaft, the outer output shaft is connected with the first transmission shaft, and the inner output shaft is connected with the second transmission shaft; the input bevel gear is sleeved on the input shaft, the inner output bevel gear is sleeved on the inner output shaft, and the outer output bevel gear is sleeved on the outer output shaft; the inner output bevel gear and the outer output bevel gear are respectively meshed with two opposite sides of the input bevel gear.

In one implementation, a coaxial gear commutator includes an input gear, an inner output gear, an outer output gear, an input shaft, an inner output shaft, an outer output shaft, and a reversing gear; the outer output shaft is sleeved outside the inner output shaft at the bottom end, the input shaft and the outer output shaft are arranged in parallel, the outer output shaft is connected with the first transmission shaft, and the inner output shaft is connected with the second transmission shaft; the input gear is sleeved on the input shaft, the inner output gear is sleeved on the inner output shaft, and the outer output gear is sleeved on the outer output shaft; the inner output gear is meshed with the input gear; the reversing gear comprises an upper gear disc and a lower gear disc, the upper gear disc is meshed with the input gear, and the lower gear disc is meshed with the outer output gear.

The utility model also provides a harvester, which comprises a machine body, an engine and the cutting device; the engine and the cutting device are both arranged on the machine body, and an input shaft of the cutting device is connected with the engine.

According to the harvester provided by the utility model, the cutting device is arranged on the machine body, the upper blade assembly and the lower blade assembly are arranged in a vertically stacked mode along the axial direction of the transmission shaft assembly, the blade surface of the upper blade assembly and the blade surface of the lower blade assembly are oppositely arranged, and the transmission shaft assembly is arranged to drive the upper blade assembly and the lower blade assembly to rotate in opposite directions, so that the upper blade and the lower blade move oppositely to perform shearing action. The blade of shearing motion can exert opposite direction's horizontal external force to the stem stalk, makes the stem stalk cross section take place the dislocation deformation and fracture along external force direction, only applys unilateral horizontal external force to the stem stalk than current cutting device, leans on stem stalk inertia to confront this horizontal external force, makes the stem stalk cross section take place to warp and fracture along external force direction, and the cutting mode of this device makes the stem stalk change the fracture, has improved the reliability of cutting.

The construction of the present invention and other objects and advantages thereof will be more apparent from the following description taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a cutting device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the drive shaft assembly and upper and lower blade assemblies of FIG. 1;

fig. 3 is a half-sectional view of a cutting device according to an embodiment of the present invention;

fig. 4 is an exploded view of another cutting device according to a second embodiment of the present invention;

fig. 5 is a half-sectional view of another cutting device provided in accordance with a second embodiment of the present invention.

Reference numerals:

100-an upper blade assembly; 110-upper blade; 120-upper tool apron;

200-a lower blade assembly; 210-lower blade; 220-lower tool apron;

300-a driveshaft assembly; 310-a first transmission shaft; 320-a second drive shaft;

400-coaxial gear commutator; 411-input shaft; 412-input gear; 412a — input bevel gear; 421-inner output shaft; 422-inner output gear; 422 a-inner output bevel gear; 431-an outer output shaft; 432-outer output gear; 432 a-outer output bevel gear; 440-a reversing gear pair; 441-an upper gear plate; 442-lower gear plate;

500-floating coupling group; 510-floating coupling of upper tool apron; 520-lower tool apron floating coupling;

600-rotating support.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

Agricultural harvesting machines are divided into two types according to cutting modes, one is reciprocating cutting and the other is rotary cutting. When the straw cutting machine works, the transmission mechanism drives the cutter disc to rotate or drives the blade to reciprocate, so that straw is cut in a sliding mode, or impact collision is applied to the straw, the straw is broken in a brittle mode, and cutting operation is completed. Taking a rotary harvester as an example, the cutting device cuts off crop stalks by using a cutter disc rotating in one direction. The rotary harvester mainly realizes harvesting by sliding cutting, unidirectional transverse external force is applied to the stalks by the tooth blades on the cutter head, the stalks are not stressed in the opposite direction of the transverse external force, and the transverse external force applied by the tooth blades is resisted only by the inertia of the stalks, so that the cross sections of the stalks are deformed and broken along the direction of the external force.

Because the cutting device of the existing harvester needs to depend on the inertia of the stalks, the cutter head needs to be capable of cutting before the stalks change the motion state, and therefore the cutter head is required to have higher rotation speed or the blades are required to have higher swing speed.

Because of the high requirement on the speed, the cutting device also has high requirement on the strength of parts, so the manufacturing cost is high; the vibration caused by high-speed rotation is large, the noise is large, and the power abrasion is large; because the cutter has high rotating speed, large blade abrasion and poor impact resistance, bottom cutting is difficult to realize, and the remained stem is high; if high-stalk crops with high toughness are encountered, the problems of continuous cutting and easy winding can also occur, the cutting is not reliable, and the long-time continuous harvesting is difficult to realize; if the stalks are thick or the stalks cannot be directly harvested.

In order to solve the problems, the utility model provides a cutting device and a harvester, wherein the upper blade component and the lower blade component which are opposite in rotation direction are arranged, so that the upper blade and the lower blade do shearing motion, the cutting can be completed at low speed, and the cutting reliability is high.

The following describes in detail various embodiments of the cutting device provided by the present invention with reference to the accompanying drawings.

Example one

Fig. 1 is an exploded view of a cutting device according to an embodiment of the present invention. As shown in fig. 1, the present embodiment provides a cutting apparatus including a coaxial gear commutator 400, a drive shaft assembly 300, an upper blade assembly 100, and a lower blade assembly 200. Wherein, the coaxial gear commutator 400 is connected to the end of the transmission shaft assembly 300 to drive the transmission shaft assembly 300 to rotate; the upper blade assembly 100 and the lower blade assembly 200 are connected to the transmission shaft assembly 300, the transmission shaft assembly 300 drives the upper blade assembly 100 and the lower blade assembly 200 to rotate along the plane of the transmission shaft assembly, and the rotation directions of the upper blade assembly 100 and the lower blade assembly 200 are opposite.

Fig. 2 is a cross-sectional view of the drive shaft assembly 300 and the upper and lower blade assemblies 200 of fig. 1. Referring to fig. 2, the upper blade assembly 100 includes an upper blade seat 120 and a plurality of upper blades 110, and the lower blade assembly 200 includes a lower blade seat 220 and a plurality of lower blades 210. Wherein, the upper tool apron 120 and the lower tool apron 220 are connected to the transmission shaft assembly 300, the upper blade 110 is mounted on the upper tool apron 120, the lower blade 210 is mounted on the lower tool apron 220, and the plurality of upper blades 110 and the plurality of lower blades 210 are respectively arranged along the circumferential direction of the upper tool apron 120 and the lower tool apron 220 at intervals; the edge surfaces of the upper blade 110 and the lower blade 210 are oppositely arranged, and the number of the upper blade 110 and the lower blade 210 is equal. The upper blade 110 and the lower blade 210 can form a plurality of pairs of scissors, the upper blade 110 and the lower blade 210 are arranged at intervals along the circumferential direction, the number of the pairs of scissors is equal, the scissors can be closed at the same time, the scissors can be cut, the upper blade holder 120 and the lower blade holder 220 can cut for a plurality of times in a rotating mode every time, and the cutting efficiency is improved while the rotating speed is controlled.

Specifically, 4 pairs of upper blades 110 and lower blades 210 can be arranged, so that the shearing efficiency is improved, and meanwhile, sufficient gaps are ensured to be formed between the blades, the blades can accommodate stalks of crops, a certain blade swinging distance is reserved, and the shearing reliability is ensured. In implementation, the upper blade 110 and the lower blade 210 can be respectively and fixedly connected to the upper blade seat 120 and the lower blade seat 220 through screws, connecting pins and the like, and when the blades are worn, the blades are convenient to disassemble, assemble and replace; in order to ensure the stable connection, each blade can be fixed by a plurality of screws or connecting pins. To further ensure the stability of the connection, the upper blade 110 and the lower blade 210 may be welded to the upper tool apron 120 and the lower tool apron 220, respectively.

Illustratively, the upper blade assembly 100 and the lower blade assembly 200 may be stacked up and down in the axial direction of the drive shaft assembly 300. The stacked arrangement can reduce the distance between the upper blade assembly 100 and the lower blade assembly 200, thereby reducing the distance between two opposite transverse forces borne by the stalks, enabling the cross sections of the stalks to be more easily subjected to dislocation deformation and fracture, and improving the shearing reliability. In other examples, the upper blade assembly 100 and the lower blade assembly 200 may be spaced apart to complete the cut at a desired rotational speed.

In some implementations, the edge faces of the upper blade 110 and the lower blade 210 may be provided as mutually matching slopes, the edge face of the upper blade 110 being inclined toward the lower blade 210, and the edge face of the lower blade 210 being inclined toward the upper blade 110. The distance between the cutting edges can be reduced by the arrangement, so that the distance between two opposite transverse forces borne by the stalks is reduced, the cross section of the stalks is more easily subjected to dislocation deformation and is broken, and the shearing reliability is improved.

For example, the cutting edge surfaces of the upper blade 110 and the lower blade 210 may be provided with serrations to improve the cutting ability of the blades so that the blades can cut at a lower rotation speed. In other examples, the cutting edge surface can also be a smooth surface, so that maintenance grinding is facilitated, and the cutting edge is kept sharp.

In addition, a rotary support 600 may be disposed between the upper tool post 120 and the lower tool post 220, as shown in fig. 2, the rotary support 600 is disposed between the upper tool post 120 and the lower tool post 220 and is not in contact with the blade, and the height of the rotary support 600 should be greater than or equal to the thickness of the upper blade 110 and the lower blade 210. Generally, in order to make the rotation of the upper blade 110 and the lower blade 210 smoother, control the blade interval, and ensure the cutting reliability, the thickness of the rotary support 600 is 1-3 mm greater than the sum of the thicknesses of the upper blade 110 and the lower blade 210. In practice, a support bearing may be selected as the rotary support 600.

It should be noted that the thickness of the blade can be set according to the thickness of the stalk of the crop to be harvested. When the harvested crops are coarse stem crops such as caragana microphylla, salix purpurea, salix psammophila and the like, the blade can be set to be thicker, and for example, the thickness of the blade can be 1cm, 3cm, 5cm and the like; when the harvested crops are fine stalk crops such as paddy and the like, the blades can be arranged to be thin, such as 1mm, 3mm, 5mm and the like.

Referring again to fig. 2, the driving shaft assembly 300 includes a first driving shaft 310 and a second driving shaft 320, the first driving shaft 310 is sleeved outside the second driving shaft 320, the upper blade assembly 100 is connected to the first driving shaft 310, and the lower blade assembly 200 is connected to the second driving shaft 320. The first transmission shaft 310 and the second transmission shaft 320 both rotate along the axial direction of the first transmission shaft 310 and the second transmission shaft 320, and are driven by the coaxial gear commutator 400 to realize the reverse rotation between the first transmission shaft 310 and the second transmission shaft 320.

Specifically, the upper tool apron 120 is welded to an outer wall of the first transmission shaft 310, and the lower tool apron 220 is welded to an outer wall of the first transmission shaft 310. For example, the upper tool holder 120 is welded to an end of the first transmission shaft 310. Alternatively, the first transmission shaft 310 and the upper tool apron 120 may be an integrally formed structure, and the second transmission shaft 320 and the lower tool apron 220 may be an integrally formed structure, so as to increase the structural strength between the tool apron and the transmission shaft assembly 300.

Fig. 3 is a half-sectional view of a cutting device according to an embodiment of the present invention. Referring to fig. 1 and 3 together, the coaxial gear commutator 400 provided in the present embodiment includes an input bevel gear 412a, an inner output bevel gear 422a, an outer output bevel gear 432a, an input shaft 411, an inner output shaft 421, and an outer output shaft 431.

The outer output shaft 431 is sleeved outside the inner output shaft 421, and the input shaft 411 is connected to the engine and vertically disposed at a side of a middle portion of the outer output shaft 431. An input bevel gear 412a is sleeved on the input shaft 411, an inner output bevel gear 422a is sleeved on the inner output shaft 421, and an outer output bevel gear 432a is sleeved on the outer output shaft 431.

An inner output bevel gear 422a and an outer output bevel gear 432a are disposed in meshing engagement with opposite sides of the input bevel gear 412a to effect counter rotation of the inner output shaft 421 and the outer output shaft 431. As shown in fig. 1, when the input shaft 411 drives the input bevel gear 412a to rotate in the direction shown by the dotted line, the inner output bevel gear 422a and the outer output bevel gear 432a engaged with the two opposite sides of the input bevel gear 412a respectively rotate in opposite directions shown by the dotted line, so as to drive the inner output shaft 421 and the outer output shaft 431 to rotate in opposite directions. Moreover, because the outer output shaft 431 is connected with the first transmission shaft 310, the inner output shaft 421 is connected with the second transmission shaft 320, and the inner output shaft 421 and the outer output shaft 431 can drive the first transmission shaft 310 and the second transmission shaft 320 to realize reverse rotation.

The inner and

outer output shafts

421 and 431 are connected to the second and

first drive shafts

320 and 310, respectively, so that the upper and

lower blades

110 and 200 can be rotated in opposite directions to produce a shearing motion of the upper and

lower blades

110 and 210.

It should be noted that the rotation direction shown in fig. 1 is only used for illustrating the transmission manner, and does not mean that the gear rotates in the direction shown in the figure. In practical cases, the gear can also rotate in the opposite direction to that shown in the figure, and the arrangement of the cutting edge surfaces of the upper blade 110 and the lower blade 210 should also be opposite to that shown in the figure, and the cutting edges are arranged on the other side of the blades, and finally the cutting edges are moved towards each other.

It should be further noted that the rotation speeds of the gears may be the same or different, and specifically, different numbers of gears may be set on the gear plate to realize the rotation speed difference. Thus, the rotational speed at which the input shaft 411 is ultimately transmitted to the upper blade assembly 100 and the lower blade assembly 200 may be the same or different. In practice, the rotation speeds of the upper blade assembly 100 and the lower blade assembly 200 are generally set to the same value, so that the stress magnitude and the wear degree of the upper blade assembly 100 and the lower blade assembly 200 are similar, and the absolute rotation speed of the upper blade assembly 100 and the lower blade assembly 200 can be reduced on the premise that the relative rotation speed is satisfied.

And as shown in fig. 1, in some implementations, the cutting device may further include a floating coupling set 500, the floating coupling set 500 in turn including an upper blade mount floating coupling 510 and a lower blade mount 220 floating coupling. The first transmission shaft 310 may be connected to the outer output shaft 431 of the coaxial gear commutator 400 by an upper blade floating coupling, and the second transmission shaft 320 may be connected to the inner output shaft 421 of the coaxial gear commutator 400 by a lower blade floating coupling 520.

Illustratively, the floating coupling consists of a double-ended slotted coupling half, an intermediate slider, steel balls and springs (not shown in the figures). The floating coupling has aligned supports in the tangential holes, and when the driving coupling rotates, the torque is transmitted via the supports and the steel balls to the slide block and then to the driven coupling, and the gap between the steel balls and the supports is determined by the springs.

The floating coupling enables the upper blade 110 and the lower blade assembly 200 to be in soft connection with the coaxial gear commutator 400 and serves as buffering, damage caused by the fact that the upper blade 110 and the lower blade assembly 200 collide with hard objects such as stones or soil blocks in the field can be reduced, the shock resistance is high, bottom cutting can be achieved, and stubble bottom can be reserved. Moreover, the support of the floating coupling can be replaced when worn, so that the reliability of the floating coupling is improved.

In the cutting device provided by the present embodiment, the upper blade assembly 100 and the lower blade assembly 200 are stacked up and down along the axial direction of the transmission shaft assembly 300, and the coaxial gear reverser 400 and the transmission shaft assembly 300 are arranged to drive the upper blade assembly 100 and the lower blade assembly 200 to rotate in opposite directions, so that the upper blade 210 and the lower blade 210 perform a shearing motion. The blade of shearing motion can exert opposite direction's horizontal external force to the stem stalk, makes the stem stalk cross section along the dislocation deformation that external force direction takes place and fracture, only applys unilateral horizontal external force to the stem stalk than current cutting device, leans on stem stalk inertia to confront with, makes the stem stalk cross section along the dislocation deformation that external force direction takes place and fracture, and the cutting mode of this device makes the stem stalk change the fracture, has improved the reliability of cutting.

After the cutting mode is changed into shearing, the rotating speed required by the device is low, taking the rotating speed of the existing cutting device as 2000r/min as an example, the rotating speed of the embodiment can be 100-400 r/min and can be 5% -20% of the rotating speed of the cutting device of the existing harvester. The rotating speed required by the cutting device of the existing harvester is generally more than 2000r/min, but the rotating speed required by the device can be as low as 100r/min, so that a series of problems caused by overlarge rotating speed required by the cutting device, such as high cost, high noise and the like, are greatly alleviated.

Example two

Fig. 4 is an exploded view of another cutting device according to a second embodiment of the present invention. As shown in fig. 4, the second embodiment provides a cutting device, which includes a coaxial gear commutator 400, a transmission shaft assembly 300, an upper blade assembly 100 and a lower blade assembly 200. Wherein, the upper blade assembly 100 and the lower blade assembly 200 are both connected to the transmission shaft assembly 300, and the upper blade assembly 100 and the lower blade assembly 200 are stacked up and down along the axial direction of the transmission shaft assembly 300; the coaxial gear commutator 400 is connected to the end of the transmission shaft assembly 300 and drives the transmission shaft assembly 300 to rotate; the drive shaft assembly 300 rotates the upper blade assembly 100 and the lower blade assembly 200 along the plane of the drive shaft assembly, and the rotation directions of the upper blade assembly 100 and the lower blade assembly 200 are opposite.

The blades with opposite rotation directions and shearing movement can apply transverse external forces with opposite directions to the stalks, so that the cross sections of the stalks are broken by dislocation deformation along the direction of the external force, the stalks are more easily broken, and the cutting reliability is improved.

Unlike the first embodiment, the coaxial commutator of the present embodiment has a different transmission structure.

Fig. 5 is a half-sectional view of another cutting device provided in accordance with a second embodiment of the present invention. As shown in fig. 4 and 5, the coaxial gear commutator 400 provided in the present embodiment includes an input gear 412, an inner output gear 422, an outer output gear 432, an input shaft 411, an inner output shaft 421, an outer output shaft 431, and a pair of commutating gears 440.

Wherein, the outer output shaft 431 is sleeved outside the inner output shaft 421, and the input shaft 411 is connected with the engine and arranged in parallel with the outer output shaft 431. The input gear 412 is sleeved on the input shaft 411, the inner output gear 422 is sleeved on the inner output shaft 421, the outer output gear 432 is sleeved on the outer output shaft 431, and a certain distance is reserved between the inner output gear 422 and the outer output gear 432.

As shown in fig. 4, the rotation direction of the input gear 412 is clockwise as shown by the dotted line, the inner output gear 422 is meshed with the input gear 412, and the input gear 412 drives the inner output gear 422 to rotate counterclockwise.

The set of reversing gear pairs 440 includes an upper gear plate 441 and a lower gear plate 442, the upper gear plate 441 and the lower gear plate 442 are fixedly connected and spaced at a certain distance, the upper gear plate 441 and the lower gear plate 442 are relatively stationary, and the spacing between the upper gear plate and the lower gear plate is consistent with the spacing between the inner output gear 422 and the outer output gear 432. The upper gear plate 441 is engaged with the input gear 412, the input gear 412 drives the upper gear plate 441 and the lower gear plate 442 to rotate counterclockwise, the lower gear plate 442 is engaged with the outer output gear 432, and the lower gear plate 442 drives the outer output gear 432 to rotate clockwise, so that the inner output shaft 421 and the outer output shaft 431 rotate in opposite directions.

Moreover, the outer output shaft 431 is connected with the first transmission shaft 310, the inner output shaft 421 is connected with the second transmission shaft 320, and the inner output shaft 421 and the outer output shaft 431 can drive the first transmission shaft 310 and the second transmission shaft 320 to realize reverse rotation.

In addition, the driving shaft assembly 300 includes a first driving shaft 310 and a second driving shaft 320 connected to the upper blade assembly 100 and the lower blade assembly 200, respectively, the upper blade assembly 100 including the upper blade 110, and the lower blade assembly 200 including the lower blade 210. The inner and

outer output shafts

421 and 431 are connected to the second and

first transmission shafts

320 and 310, respectively, so that the upper and lower blade assemblies 200 can rotate in opposite directions to form a shearing motion of the upper and lower blades 210.

The cutting device, the transmission shaft assembly 300, the upper blade assembly 100 and the lower blade assembly 200 provided in this embodiment are the same as those in the first embodiment, and therefore, detailed descriptions thereof are omitted.

EXAMPLE III

The utility model provides a harvester, which comprises a machine body, an engine and a cutting device, wherein the engine and the cutting device are both arranged on the machine body, the cutting device is in a shearing type, and an input shaft 411 of the cutting device is connected with the engine.

When the harvester works, the height of the cutting device can be adjusted according to actual conditions, so that the blade on the cutting device is basically vertical to the bottom of a crop stalk, the blade which does shearing movement can apply two transverse external forces with opposite directions to the stalk, the cross section of the stalk is broken by dislocation deformation along the external force direction, the shearing type harvester has low requirement on speed, the cutting device can run at low speed, the device has low requirement on the strength of parts, and the manufacturing cost can be reduced; the device running at low speed has small vibration and noise; the cutting can be finished without depending on the stalks by inertia confrontation, and the coarse stalk crops and the high-toughness and high-stalk crops can be cut.

Other technical features of the cutting device provided in this embodiment are the same as those of the first embodiment or the second embodiment, and are not described herein again.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting device is characterized by comprising a transmission shaft assembly, an upper blade assembly and a lower blade assembly, wherein the upper blade assembly and the lower blade assembly are connected to the transmission shaft assembly, and the upper blade assembly and the lower blade assembly are stacked up and down along the axial direction of the transmission shaft assembly;

the transmission shaft assembly drives the upper blade assembly and the lower blade assembly to rotate along the plane where the upper blade assembly and the lower blade assembly are located, and the rotating directions of the upper blade assembly and the lower blade assembly are opposite;

wherein the upper blade assembly comprises a plurality of upper blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the lower blade assembly comprises a plurality of lower blades which are arranged at intervals along the circumferential direction of the transmission shaft assembly; the blade surface of the upper blade and the blade surface of the lower blade are oppositely arranged and move oppositely.

2. The cutting device of claim 1, wherein the plurality of upper blades and the plurality of lower blades are evenly spaced and equal in number.

3. The cutting device of claim 1, wherein the cutting edge surfaces of the upper blade and the lower blade are mutually matched beveled, the cutting edge surfaces of the upper blade being inclined toward the lower blade and the cutting edge surfaces of the lower blade being inclined toward the upper blade.

4. The cutting device of any one of claims 1-3, wherein the drive shaft assembly comprises a first drive shaft and a second drive shaft, the first drive shaft being disposed about the second drive shaft, the upper blade assembly being coupled to the first drive shaft, the lower blade assembly being coupled to the second drive shaft;

wherein, first transmission shaft and second transmission shaft are all rotatory along the axial of self, and the direction of rotation of first transmission shaft and second transmission shaft is opposite.

5. The cutting device according to claim 4, wherein the upper blade assembly further comprises an upper blade seat connected to an outer wall of the first transmission shaft, the upper blade is mounted on the upper blade seat, and the upper blades are arranged at intervals along a circumferential direction of the upper blade seat;

the lower blade assembly further comprises a lower blade holder, the lower blade holder is connected to the outer wall of the second transmission shaft, the lower blades are installed on the lower blade holder, and the lower blades are arranged along the circumferential direction of the lower blade holder at intervals.

6. The cutting device as claimed in claim 5, wherein the upper blade seat and the first transmission shaft are rotatably supported as an integral molding, and the lower blade seat and the second transmission shaft are integrally molded.

7. The cutting device of claim 4, further comprising a coaxial gear reverser coupled to an end of the drive shaft assembly, the coaxial gear reverser causing the first drive shaft and the second drive shaft to rotate in opposite directions.

8. The cutting device of claim 7, wherein the coaxial gear commutator comprises an input bevel gear, an inner output bevel gear, an outer output bevel gear, an input shaft, an inner output shaft, and an outer output shaft;

the outer output shaft is sleeved outside the inner output shaft, the input shaft is vertically arranged on the side of the middle part of the outer output shaft, the outer output shaft is connected with the first transmission shaft, and the inner output shaft is connected with the second transmission shaft;

the input bevel gear is sleeved on the input shaft, the inner output bevel gear is sleeved on the inner output shaft, the outer output bevel gear is sleeved on the outer output shaft,

the inner output bevel gear and the outer output bevel gear are respectively meshed with two opposite sides of the input bevel gear.

9. The cutting apparatus of claim 7, wherein the coaxial gear reverser comprises an input gear, an inner output gear, an outer output gear, an input shaft, an inner output shaft, an outer output shaft, and a pair of reversing gears;

the outer output shaft is sleeved outside the inner output shaft, the input shaft and the outer output shaft are arranged in parallel, the outer output shaft is connected with the first transmission shaft, and the inner output shaft is connected with the second transmission shaft;

the input gear is sleeved on the input shaft, the inner output gear is sleeved on the inner output shaft, and the outer output gear is sleeved on the outer output shaft

The inner output gear is meshed with the input gear; the reversing gear pair comprises an upper gear disc and a lower gear disc, the upper gear disc is meshed with the input gear, and the lower gear disc is meshed with the outer output gear.

10. A harvester comprising a fuselage body, an engine and a cutting device as claimed in any one of claims 1 to 9;

the engine and the cutting device are both arranged on the machine body, and an input shaft of the cutting device is connected with the engine.