Half-feed harvesting operation mechanism of combine harvester

Abstract

The invention discloses a semi-feed harvesting operation mechanism for a combine harvester, which comprises a frame, a rice cutting mechanism, a lateral conveying mechanism for pushing the rice, and a threshing cylinder mechanism. It further comprises a rice straw cutting mechanism, a turning conveying mechanism, an inclined lifting conveying mechanism and a threshing feeding mechanism. The semi-feed harvesting operation mechanism of the combine harvester of the invention can make the placement and movement of the rice ears with straws orderly during the transfer and conveying process, and can accurately send the rice ears directly above the threshing cylinder. Since the rice ears enter from the top of the threshing cylinder, the rice ears naturally rest on the threshing cylinder under the action of gravity, and the rice ears can fully collide and contact with the threshing teeth on the threshing cylinder, which can improve the threshing efficiency, is beneficial to shortening the length of the threshing cylinder, and reducing the volume and weight of the combine harvester. Moreover, during the threshing process, the rice ears with straws do not completely enter the threshing cylinder, so the threshing energy consumption is lower, there is less straw in the threshing cylinder, and it is more conducive to the separation of grains.

Description

Technical Field

[0001] The invention relates to the technical field of combine harvesters, and in particular to a semi-feeding harvesting operation mechanism of a combine harvester. Background Art

[0002] There are two main types of combine harvesters: full-feed and half-feed.

[0003] The full-feed combine harvester sends all the cut rice stalks and rice ears into the threshing drum for threshing. A lot of rice straw debris is produced in the threshing drum. The full-feed combine harvester is large in size and weight, and is not suitable for hilly field operations.

[0004] After harvesting, the existing semi-feeding combine harvester transfers the conveyor chain to clamp the middle section of the rice stalk. In the process of transferring to the threshing conveyor chain, the rice ears are changed from a vertical posture to a horizontal posture. The threshing conveyor chain clamps the middle section of the rice stalk and drags the rice stalk so that the rice ears and part of the rice stalk enter the bottom of the threshing drum and rest on the concave plate screen. The threshing conveyor chain clamps part of the rice stalk and runs under load outside the threshing drum. The front and rear of the threshing drum are designed with a conveyor chain guide rod, a threshing depth adjustment mechanism, and a dedicated grass removal drag chain, which makes the front and rear parts of the feed port of the threshing drum complex. And because the rice ears and part of the rice stalk cover part of the sieve holes, some grains have to pass through the plants to pass through the sieve holes, which is not conducive to the rapid separation of the threshed grains. In addition, the existing semi-feeding combine harvester not only has the disadvantages of complex structure, heavy weight and high cost, but also its operating efficiency is far less than that of the full-feeding model, and the lateral width of the small machine cannot be equal to the harvesting width, which is not conducive to the miniaturization of the machine.

[0005] In addition, the existing full-feed and half-feed combine harvesters are heavy and bulky, which are not conducive to operation between terraces in hilly and mountainous areas and cannot meet the requirements of full-process mechanized production of grain production.

[0006] The cutting width of the existing reaper is equivalent to the machine banner, and there are multiple cutting widths to choose from. It has a compact structure, is lightweight, and has a high harvesting efficiency. The harvested crops can be placed neatly and orderly in the field, but it does not have the functions of threshing and cutting short plants back into the field, and is not a combine harvester. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a semi-feeding harvesting operation mechanism for a combine harvester to solve the shortcomings of existing combine harvesters in terms of energy consumption, volume and weight.

[0008] The semi-feeding harvesting mechanism of the combine harvester of the present invention comprises a rice-cutting mechanism, a rice-pushing transverse conveying mechanism located above the rice-cutting mechanism, and a threshing mechanism located on a frame, and further comprises a rice-stalk shortening mechanism, a steering conveying mechanism, and an inclined lifting conveying mechanism;

[0009] The rice straw cutting mechanism is arranged at the discharge end of the reel transverse conveying mechanism and is used to cut short the rice straw below the rice ears;

[0010] The turning conveying mechanism is located above the rice straw cutting mechanism, and the turning conveying mechanism is used to send the rice ear-bearing rice straw after cutting short the rice straw to the inclined lifting mechanism;

[0011] The inclined lifting and conveying mechanism is arranged beside the feeding end of the threshing mechanism, and the inclined lifting mechanism is used to send the rice ear-bearing rice straw discharged from the turning conveying mechanism to the upper part of the feeding end of the threshing cylinder of the threshing mechanism.

[0012] Furthermore, the threshing mechanism includes a threshing cylinder, a cylinder housing arranged outside the threshing cylinder, and a threshing feeding mechanism arranged above the cylinder housing. An axial notch for the rice straw to move along the axial direction of the threshing cylinder is arranged at the upper part of the cylinder housing. A spike stalk inlet window is arranged at the feeding end of the cylinder housing, and a rice straw discharge window is arranged at the discharge end of the cylinder housing; the threshing feeding mechanism is used to push the rice ear-bearing rice straw to move along the axial notch.

[0013] Furthermore, the threshing feeding mechanism includes a receiving and guiding plate obliquely arranged at the lower side of the upper end of the belt conveyor, several vertically arranged rice straw supporting clamping plates located above the cylinder housing and beside the axial notch, and a third chain conveyor for pushing the rice ear-bearing rice straw to move along the rice straw supporting clamping plates. The length direction of the rice straw supporting clamping plates is parallel to the axial direction of the threshing cylinder, and one end of the rice straw supporting clamping plates extends to the receiving and guiding plate to form an inclined rice straw guiding section; the receiving and guiding plate has a downward extension for guiding the rice ears into the cylinder housing.

[0014] Furthermore, a winnowing mechanism is also arranged at the discharge end of the cylinder housing. The winnowing mechanism includes an impeller housing fixed at the discharge end of the cylinder housing and a straw discharging wheel arranged inside the impeller housing. An outlet for the rice straw is also arranged at the discharge end of the cylinder housing and is communicated with the lower part of the impeller housing, and a straw discharge opening is arranged at the upper part of the impeller housing.

[0015] Furthermore, the reel transverse conveying mechanism includes a dividing board, a reel arranged at the lower side of the dividing board, a limiting guide rod for guiding the rice ear-bearing rice straw to move horizontally along the frame, a first chain conveyor arranged horizontally along the frame for pushing the rice ear-bearing rice straw to move horizontally along the frame, and a retaining board arranged above the first chain conveyor.

[0016] Furthermore, the rice straw cutting mechanism includes a vertically arranged moving knife shaft, moving knife blades arranged on the moving knife shaft, a fixed knife shaft vertically arranged beside the moving knife shaft, and fixed knife blades arranged on the cooperation between the fixed knife shaft and the moving knife blades.

[0017] Furthermore, the steering conveying mechanism includes a horizontally arranged guide groove, a rice supporting stand arranged next to the guide groove, and a second chain conveyor for pushing the rice stalks with ears to move along the guide groove. The guide groove is used to guide the rice stalks with ears that have been shortened by the rice stalk shortening mechanism to the feed end of the inclined lifting conveying mechanism.

[0018] Furthermore, the inclined lifting conveying mechanism includes an inclined belt conveyor, an inclined receiving plate arranged at the lower end of the belt conveyor for receiving the rice stalks with ears discharged from the steering conveying mechanism, and tooth plates arranged on both sides of the conveyor belt of the belt conveyor for picking up the rice stalks with ears that fall on the inclined receiving plate and pushing the rice stalks with ears upward.

[0019] Beneficial effects of the present invention:

[0020] 1. The semi-feeding harvesting mechanism of the combine harvester of the present invention shortens the rice stalks with ears by setting a rice stalk shortening mechanism, and lifts and transports the rice stalks with ears to the upper part of the feeding end of the threshing drum of the threshing mechanism through a steering conveying mechanism and an inclined lifting conveying mechanism. The semi-feeding harvesting mechanism of the combine harvester of the present invention can make the placement and movement of the rice stalks with ears in the process of transfer and transportation orderly, and can accurately deliver the rice ears directly to the top of the threshing drum.

[0021] 2. The semi-feeding harvesting operation mechanism of the combine harvester of the present invention shortens the rice stalks with ears by setting a rice stalk shortening mechanism, and lifts and transports the rice stalks with ears to the upper part of the feeding end of the threshing drum of the threshing mechanism through a steering conveying mechanism and an inclined lifting conveying mechanism, so that the rice ears enter from the upper part of the threshing drum, and the rice ears are naturally placed on the threshing drum under the action of gravity, and the threshing teeth can easily penetrate the rice ears, so that the threshing teeth and the rice ears fully collide and contact, thereby improving the threshing efficiency. Therefore, compared with the existing semi-feeding combine harvester in which the rice ears enter from the lower part of the threshing drum, the threshing efficiency is higher.

[0022] Compared with the existing semi-feeding combine harvester in which rice ears enter from the lower part of the threshing drum, the conveying chain guide rods, threshing depth adjustment mechanism, and dedicated grass removal drag chain and other mechanisms arranged in front and behind the threshing drum are cancelled, thereby reducing the volume and weight of the combine harvester.

[0023] In addition, in the semi-feeding harvesting operation mechanism of the combine harvester of the present invention, rice ears enter from the top of the threshing drum, and the threshed rice grains move downwardly at an angle, so that the rice grains are not easy to splash and leak.

[0024] In addition, the semi-feeding harvesting mechanism of the combine harvester of the present invention does not completely allow the rice stalks with ears to enter the threshing drum. Therefore, compared with the full-feeding combine harvester, the threshing energy consumption is lower, the rice straw scraps in the threshing drum are less, and it is more conducive to the separation of grains.

[0025] 3. The semi-feed harvesting operation mechanism of the combine harvester of the present invention. Its stubble cutting mechanism meets the environmental protection requirements of cutting and returning the lower part of the rice straw to the field. Moreover, since the weight and length of the rice straw are reduced after cutting, it is beneficial to the connection with the inclined lifting and conveying mechanism during subsequent transfer and conveying, and can shorten the width of the inclined lifting and conveying mechanism, making the structure more concise and lightweight.

[0026] The semi-feed harvesting operation mechanism of the combine harvester of the present invention. Its steering and conveying mechanism can control the laying position of the rice panicles with straw, meeting the position layout requirements of subsequent related operation mechanisms.

[0027] 4. The semi-feed harvesting operation mechanism of the combine harvester of the present invention. Due to its small volume, it can be arranged horizontally or longitudinally, and can achieve diversification of the machine type in combination with different traveling mechanisms. And the cutting width of the semi-feed harvesting operation mechanism of the combine harvester of the present invention is equivalent to the lateral dimension of the frame, which also makes the operation of its harvesting work better, and is also convenient to construct machine types with different widths according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the semi-feed harvesting operation mechanism of the combine harvester in the embodiment;

[0029] Figure 2 It is a schematic diagram of the main structure of another perspective of the semi-feed harvesting operation mechanism of the combine harvester in the embodiment;

[0030] Figure 3 It is a schematic diagram of the main structure of another perspective of the semi-feed harvesting operation mechanism of the combine harvester in the embodiment;

[0031] Figure 4 It is a three-dimensional structure schematic diagram of the discharging device of the semi-feed harvesting operation mechanism of the combine harvester;

[0032] Figure 5 It is a schematic diagram of the structure of the threshing cylinder part;

[0033] Figure 6 It is another schematic diagram of the structure of the threshing cylinder part;

[0034] Figure 7 It is another schematic diagram of the structure of the threshing cylinder part;

[0035] Figure 8 It is another schematic diagram of the structure of the threshing cylinder part;

[0036] Figure 9 It is a schematic diagram of the main structure of another layout of the semi-feed harvesting operation mechanism of the combine harvester in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] As shown in the figure, in this embodiment, the semi-feed harvesting operation mechanism of the combine harvester includes a cutting mechanism 3, a reel transverse conveying mechanism located above the cutting mechanism, and a threshing mechanism located on the frame. In a specific implementation, the cutting mechanism 3, the reel transverse conveying mechanism located above the cutting mechanism, and the threshing mechanism are all arranged on the frame 1, and a traveling mechanism 2 is also arranged on the frame to drive the semi-feed harvesting operation mechanism of the combine harvester to move forward.

[0039] In this embodiment, the reel transverse conveying mechanism includes a dividing board 4, a reel 5 arranged under the dividing board, a limit guiding rod 6 for guiding the ear-bearing rice straws to move transversely along the frame, a first chain conveyor 7 arranged transversely along the frame for pushing the ear-bearing rice straws to move transversely along the frame, and a baffle 8 arranged above the first chain conveyor. Of course, in different embodiments, the reel transverse conveying mechanism may also adopt other forms.

[0040] The semi-feed harvesting operation mechanism of the combine harvester in this embodiment further includes a straw cutting mechanism, a turning conveying mechanism, and an inclined lifting conveying mechanism.

[0041] The straw cutting mechanism is arranged at the discharge end of the reel transverse conveying mechanism and is used to cut short the straw below the rice ear. In this embodiment, the straw cutting mechanism includes a vertically arranged moving knife shaft 11, moving blades 12 arranged on the moving knife shaft, a fixed knife shaft 13 vertically arranged beside the moving knife shaft, and fixed blades 14 arranged on the fixed knife shaft in cooperation with the moving blades.

[0042] The turning conveying mechanism is located above the straw cutting mechanism, and the turning conveying mechanism is used to send the ear-bearing rice straws after the straw is cut short to the inclined lifting mechanism. In this embodiment, the turning conveying mechanism includes a horizontally arranged guiding groove 15, a supporting vertical board 16 arranged beside the guiding groove, and a second chain conveyor 17 for pushing the ear-bearing rice straws to move along the guiding groove. The guiding groove is used to guide the ear-bearing rice straws cut short by the straw cutting mechanism to the feeding end of the inclined lifting conveying mechanism.

[0043] The inclined lifting conveying mechanism is arranged beside the feeding end of the threshing mechanism, and the inclined lifting mechanism is used to send the ear-bearing rice straws discharged from the turning conveying mechanism to the upper part of the feeding end of the threshing cylinder of the threshing mechanism. In this embodiment, the inclined lifting conveying mechanism includes an inclined belt conveyor 18, an inclined receiving plate 19 arranged at the lower end of the belt conveyor for receiving the ear-bearing rice straws discharged from the turning conveying mechanism, and tooth plates 20 arranged on both sides of the conveyor belt of the belt conveyor for picking up the ear-bearing rice straws fallen on the inclined receiving plate and pushing the ear-bearing rice straws upward.

[0044] The semi-feeding harvesting mechanism of the combine harvester in this embodiment shortens the rice stalks with ears by setting a rice stalk shortening mechanism, and lifts and transports the rice stalks with ears to the upper part of the feeding end of the threshing drum of the threshing mechanism by a steering conveying mechanism and an inclined lifting conveying mechanism. The semi-feeding harvesting mechanism of the combine harvester of the present invention can make the placement and movement of the rice stalks with ears in the process of transfer and transportation orderly, and can accurately send the rice ears directly to the top of the threshing drum. And compared with the existing semi-feeding combine harvester in which the rice ears enter from the lower part of the threshing drum, it cancels the conveying chain guide rods, threshing depth adjustment mechanism, and dedicated grass removal drag chain and other mechanisms arranged in front and behind the threshing drum, thereby reducing the volume and weight of the combine harvester.

[0045] The threshing mechanism comprises a threshing drum, a drum shell arranged outside the threshing drum, and a threshing feeding mechanism arranged above the drum shell. The upper part of the drum shell is provided with an axial slot for the rice stalks to move axially along the threshing drum, the feeding end of the drum shell is provided with an ear stalk entry window, and the discharge end of the drum shell is provided with a straw discharge window; the threshing feeding mechanism is used for pushing the ear stalks to move along the axial slot.

[0046] In this embodiment, the threshing mechanism includes a threshing drum 9, a drum shell 10 arranged outside the threshing drum, and a threshing feeding mechanism arranged above the drum shell.

[0047] The upper part of the drum shell is provided with an axial notch 21 for the rice stalks to move axially along the threshing drum, the feeding end of the drum shell is provided with a rice stalk entry window 22, and the discharging end of the drum shell is provided with a rice straw discharge window 23.

[0048] The threshing and feeding mechanism is arranged above the drum shell, and is used to push the rice stalks with ears to move along the axial notch. In this embodiment, the threshing and feeding mechanism includes a material receiving guide plate 24 obliquely arranged at the lower side of the upper end of the belt conveyor, a plurality of vertically arranged rice stalk support clamps 25 located above the drum shell and beside the axial notch, and a third chain conveyor 26 for pushing the rice stalks with ears to move along the rice stalk support clamps, the length direction of the rice stalk support clamps is parallel to the axial direction of the threshing drum, and one end of the rice stalk support clamps extends to the material receiving guide plate to form an inclined rice stalk introduction section 27; the material receiving guide plate has a lower extension 28 for introducing rice ears into the drum shell.

[0049] In this embodiment, the threshing mechanism allows the rice panicles to enter from the top of the threshing cylinder. The characteristic structures of its cylinder housing and the threshing and feeding mechanism, as well as the mutual cooperation between the cylinder housing and the threshing and feeding mechanism, ensure that the rice stalks with panicles move stably and reliably along the axial direction at the upper part of the threshing cylinder, thereby enabling threshing and straw discharging. The threshed rice grains move obliquely downward, making it difficult for the rice grains to splash and leak. Since the rice stalks with panicles do not completely enter the threshing cylinder, the threshing energy consumption is lower compared to a full-feed combine harvester, there is less straw debris in the threshing cylinder, which is more conducive to the separation of grains.

[0050] The first chain conveyor, the second chain conveyor, and the third chain conveyor in this embodiment all include chains and the threshing teeth arranged on the chains to push the rice stalks with panicles to move. In this embodiment, the axial direction of the threshing cylinder is arranged parallel to the transverse direction of the frame; of course, in different embodiments, the axial direction of the threshing cylinder can also be arranged parallel to the longitudinal direction of the frame.

[0051] As an improvement to the above embodiment, an air separation mechanism is further provided at the discharge end of the cylinder housing. The air separation mechanism includes an impeller housing 32 fixed at the discharge end of the cylinder housing and a straw discharge wheel 33 arranged inside the impeller housing. An outlet 34 communicating with the lower part of the impeller housing is also provided at the discharge end of the cylinder housing, and a straw discharge opening 35 is provided at the upper part of the impeller housing. This improvement enables an axial air flow to exist between the threshing cylinder and the separation sieve under the rotation of the straw discharge wheel 3. The axial air flow can blow the straw towards the outlet 34, and the straw discharged from the outlet is thrown out from the straw discharge opening 35 by the straw discharge wheel. This improvement can improve the grain sorting effect and avoid the problem of blockage caused by the accumulation of straw debris at the bottom of the threshing cylinder.

[0052] The working process of the semi-feed harvesting operation mechanism of the combine harvester in this embodiment is as follows:

[0053] During the moving process of the walking mechanism, the rice stalks are divided into different rows under the action of the rice-dividing plate of the rice-dividing transverse conveying mechanism. The rice-dividing wheel moves the rice stalks backward at an angle so that the rice stalks enter between the limiting guide rod and the first chain conveyor. At the same time, the rice-cutting mechanism cuts off the rice stalks from the lower part of the rice stalks. The upper part of the cut rice stalks rests on the rice-blocking plate, which can prevent the upper part of the rice stalks from breaking. Under the action of the first chain conveyor, the lower part of the cut rice stalks with ears enters the rice stalk shortening mechanism, and the upper part of the rice stalks with ears enters the guide groove of the steering conveying mechanism. The rice stalk shortening mechanism cuts off the lower part of the rice stalks with ears and discharges them into the rice field in several sections. The shortened rice stalks with ears are sent to the feed end of the inclined lifting conveying mechanism by the second chain conveyor in the guide groove. After leaving the guide groove, the rice stalk with fringe falls on the inclined receiving plate 19 of the inclined lifting conveying mechanism. The rice stalk with fringe on the inclined receiving plate is pushed upward by the belt conveyor and the tooth plate thereon. The rice stalk with fringe is discharged from the upper end of the belt conveyor and falls on the receiving guide plate 24 below. During the downward movement of the rice stalk with fringe along the receiving guide plate 24, the rice stalk portion enters the rice stalk introduction section 27 and enters the rice-pulling teeth of the third chain conveyor along the rice stalk introduction section. At the same time, the rice ear portion of the rice stalk with fringe enters the drum shell from the stalk entry window 22 under the guidance of the lower edge of the receiving guide plate. Under the push of the third chain conveyor, the rice stalk with fringe moves along the axial notch on the upper part of the drum shell, and the rice ear leans on the threshing drum under the action of gravity. The rotating threshing drum collides with the rice ear to realize threshing. The threshed grains are sorted by the sorting screen 29 arranged below the threshing drum and enter the screw conveyor 30 at the lower part of the drum shell. The grains discharged by the screw conveyor are then thrown out by the grain throwing mechanism 31. In this embodiment, the grain throwing mechanism includes a discharge pipe and a grain throwing impeller arranged in the lower end of the discharge pipe.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without deviating from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. The semi-feed harvesting operation mechanism of a combine harvester, comprising a crop cutting mechanism, a crop feeding and lateral conveying mechanism located above the crop cutting mechanism, and a threshing mechanism located on the frame, characterized in that: It also includes a rice straw cutting mechanism, a turning conveyor mechanism and an inclined lifting conveyor mechanism; The rice straw cutting mechanism is arranged at the discharge end of the rotary cross conveyor for cutting short the rice straw under the rice ear; The turning conveyor mechanism is located above the rice straw cutting mechanism and is used to send the rice ear-bearing straw after cutting short the rice straw to the inclined lifting mechanism; The inclined lifting conveyor mechanism is arranged beside the feeding end of the threshing mechanism. The inclined lifting mechanism is used to send the rice ear-bearing straw discharged from the turning conveyor mechanism to the upper part of the feeding end of the threshing drum of the threshing mechanism; The threshing mechanism includes a threshing drum, a drum housing arranged outside the threshing drum and a threshing feeding mechanism arranged above the drum housing. An axial notch for the rice straw to move along the axial direction of the threshing drum is arranged at the upper part of the drum housing. An ear stalk inlet window is arranged at the feeding end of the drum housing, and a rice straw discharge window is arranged at the discharge end of the drum housing; the threshing feeding mechanism is used to push the rice ear-bearing straw to move along the axial notch; The threshing feeding mechanism includes a receiving and guiding plate obliquely arranged at the lower side of the upper end of the belt conveyor, several vertically arranged rice straw supporting clamping plates located above the drum housing and beside the axial notch, and a third chain conveyor for pushing the rice ear-bearing straw to move along the rice straw supporting clamping plates. The length direction of the rice straw supporting clamping plates is parallel to the axial direction of the threshing drum. One end of the rice straw supporting clamping plate extends to the receiving and guiding plate to form an inclined rice straw guiding section; the receiving and guiding plate has a downward extension for guiding the rice ear into the drum housing; The turning conveyor mechanism includes a horizontally arranged guiding groove, a rice ear supporting vertical plate arranged beside the guiding groove, and a second chain conveyor for pushing the rice ear-bearing straw to move along the guiding groove. The guiding groove is used to guide the rice ear-bearing straw after being cut short by the rice straw cutting mechanism to the feeding end of the inclined lifting conveyor mechanism; The inclined lifting conveyor mechanism includes an inclined belt conveyor, an inclined receiving plate arranged at the lower end of the belt conveyor for receiving the rice ear-bearing straw discharged from the turning conveyor mechanism, and tooth plates arranged on both sides of the conveyor belt of the belt conveyor for picking up the rice ear-bearing straw fallen on the inclined receiving plate and pushing the rice ear-bearing straw upward; 2. The semi-feed harvesting operation mechanism of a combine harvester according to claim 1, characterized in that: A winnowing mechanism is also arranged at the discharge end of the drum housing. The winnowing mechanism includes an impeller housing fixed at the discharge end of the drum housing and a straw discharging wheel arranged inside the impeller housing. An outlet for the rice straw is also arranged at the lower part of the impeller housing, and a straw discharging port is arranged at the upper part of the impeller housing; 3. The semi-feed harvesting operation mechanism of a combine harvester according to claim 1, characterized in that: The rotary cross conveyor includes a dividing board, a rotary wheel arranged at the lower side of the dividing board, a limit guiding rod for guiding the rice ear-bearing straw to move horizontally along the frame, a first chain conveyor arranged horizontally along the frame for pushing the rice ear-bearing straw to move horizontally along the frame, and a baffle arranged above the first chain conveyor; 4. The semi-feed harvesting operation mechanism of a combine harvester according to claim 1, characterized in that: The rice straw cutting mechanism includes a vertically arranged moving knife shaft, moving blades arranged on the moving knife shaft, a fixed knife shaft vertically arranged beside the moving knife shaft, and fixed blades arranged on the cooperation between the fixed knife shaft and the moving blades.

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