CN109121730B

CN109121730B - Rice thresher of convenient switching

Info

Publication number: CN109121730B
Application number: CN201811003535.9A
Authority: CN
Inventors: 章云; 张贝尼; 章飞云
Original assignee: Jixi Yuandao Agricultural Industrial Technology Co ltd
Current assignee: Jixi Yuandao Agricultural Industrial Technology Co ltd
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2021-04-06
Anticipated expiration: 2038-08-30
Also published as: CN109121730A

Abstract

The invention relates to a rice thresher convenient to switch, which relates to the field of agricultural machinery, and comprises a machine body and a separating roller, wherein the left upper end of the machine body is provided with a motor, an output shaft of the motor is connected with a second belt pulley in a key way, the second belt pulley is connected with an electric switching mechanism through a belt, the central positions of the left end and the right end of the separating roller are fixedly connected with one end of a fixed shaft, the other end of the fixed shaft is movably connected with a pedal switching mechanism, the fixed shaft on the right side of the separating roller is movably connected with the electric switching mechanism, the outside of the pedal switching mechanism is connected with a linkage wheel in a key way, when power is cut off during rice threshing, the fixed shaft on the threshing roller can be separated from a first belt pulley through the electric switching mechanism, and then the fixed shaft is mechanically connected, the free switching between manpower drive and power drive is realized.

Description

Rice thresher of convenient switching

Technical Field

The invention belongs to the field of agricultural machinery, and particularly relates to a rice thresher convenient to switch.

Background

The rice threshing machine is commonly called as a rice thresher, and rice grains and stalks are separated by the rice threshing machine after the rice is harvested. The rice thresher is divided into two types, one type is driven by manpower, is called as a manpower rice thresher and is a semi-mechanized tool; one type of rice thresher is driven by power instead of a rice thresher, so the rice thresher is called as a power rice thresher, the labor intensity of rice harvesting is greatly reduced, and the agricultural productivity is improved.

In the prior art, the rice thresher is only driven by manpower or power, and the two driving modes cannot be switched, so that the rice thresher cannot normally work if power is cut off or the power driving device fails in working, and the working efficiency is greatly influenced.

Disclosure of Invention

The invention aims to provide a rice thresher convenient to switch, so as to solve the defects caused in the prior art.

In order to solve the technical problems, the invention adopts the technical scheme that: a rice thresher convenient to switch comprises a thresher body and a separating roller, wherein the front end surface and the rear end surface of the right lower side of the thresher body are connected with the top ends of front and rear support legs of a pedal plate through a rotating shaft, the left upper end of the thresher body is provided with a motor, the output shaft of the motor is connected with a second belt pulley key, the second belt pulley is connected with the electric switching mechanism through a belt, the central position of the left and right ends of the separation roller is fixedly connected with one end of a fixed shaft, the other end of the fixed shaft is movably connected with a pedal switching mechanism, the fixed shaft is rotatably connected with the upper right end of the interior of the machine body, the fixed shaft on the right side of the separation roller is movably connected with the electric switching mechanism, the outside of the pedal switching mechanism is connected with the linkage wheel key, the outer surface of the linkage wheel is connected with the upper end of the linkage rod through a positioning shaft, and the lower end of the linkage rod is connected with the supporting leg of the pedal plate through a positioning shaft.

Preferably, the pedal switching mechanism comprises a fixed frame, a linkage shaft, an inner gear disc, a central gear, a right-angle bracket, a first pushing block, a T-shaped sliding block and a connecting rod, the end parts of the left and right supporting legs of the fixed frame are fixedly connected with the outer side surface of the machine body, a frame hole is formed in the middle position of the top of the fixed frame, rectangular grooves are formed in the left and right sides of the inner side wall of the frame hole, wing plates are symmetrically arranged on the edges of the upper and lower sides of the frame hole, gear grooves penetrating through the top of the fixed frame are symmetrically formed in the left and right sides of the frame hole, the middle position of each gear groove is communicated with the rectangular grooves through a switching groove, a gear shaft is arranged on the upper side inside of each gear groove, inner positioning blocks are symmetrically arranged on the inner side walls, close to the rectangular grooves, of the two ends of the gear shaft are, the upper end surface of the linkage shaft is symmetrically provided with lower notches corresponding to the upper notches, the lower end of the linkage shaft is connected with the linkage wheel key, the fixed shaft and the linkage shaft are respectively provided with a wing edge groove rotationally connected with a wing plate, the central position of the inner side surface of the inner gear disc is meshed with the cylindrical gear, the left side and the right side of the inner side surface of the inner gear disc are symmetrically provided with a limiting end, the top of the limiting end is rotationally connected with a circular groove arranged at the top of the linkage shaft, the central gear is positioned at the central position of the gear groove, the middle position of the central gear is provided with a first threaded hole, the left side and the right side of the central gear are symmetrically provided with circular limiting grooves, one end of the right-angle bracket is rotationally connected with the circular limiting grooves, the other end of the right-angle bracket is fixedly connected with the side wall of the switching groove, the upper side and the lower side of the first pushing block are symmetrically, the side symmetry that first promotion piece is close to the gear groove is equipped with the cushion chamber, interior locating piece and first locating groove sliding connection, the tip and the cushion chamber sliding connection of the upper and lower two landing legs of connecting rod, the top central point of connecting rod put and the one end fixed connection of lead screw, lead screw and first screw hole threaded connection, the inside of cushion chamber is equipped with first spring, the one end of first spring and the bottom fixed connection of cushion chamber, the other end of first spring and the tip fixed connection of connecting rod landing leg, the tip of T shape slider puts fixed connection with the side central point of switching board, the T shape end and the T shape circular slot sliding connection of T shape slider.

Preferably, the electric switching mechanism comprises a first belt pulley, a rotating block, a sliding block, a hinge rod, a pushing column and a second pushing block, the first belt pulley is connected with the second belt pulley through a belt, a circular hole is formed in the middle of the first belt pulley, limiting blocks are symmetrically arranged on the left side and the right side of the first belt pulley, inserting grooves are symmetrically formed in the upper side and the lower side of the right end face of the first belt pulley, the first belt pulley is rotatably connected with a fixed shaft through the circular hole, the limiting blocks are fixedly connected with the outer surface of the fixed shaft, the inner side face of each limiting block is in contact connection with the first belt pulley, the rotating block is located on the right side of the first belt pulley, a first rectangular cavity is formed in the fixed shaft between the rotating block and the first belt pulley, a circular rotating groove is formed in the right side face of the rotating block, a second threaded hole is, the middle position of the front and rear side walls of the first rectangular cavity is provided with a middle chute, the upper and lower sides of the front and rear side walls of the first rectangular cavity are symmetrically provided with side chutes, the upper and lower sides of the left end edge of the second pushing block are symmetrically provided with linkage posts, the interior of the second pushing block is provided with an inner cavity, the bottom end of the linkage post is fixedly connected with the outer surface of the second pushing block, the left side of the linkage post is provided with an inserted bar corresponding to the insertion groove, the front and rear side surfaces of the linkage post are symmetrically provided with side sliders, the inserted bar is fixedly connected with the linkage post, the side sliders are slidably connected with the side chutes, the left end of the pushing post is slidably connected with the inner cavity, the upper and lower sides of the pushing post close to the right end are symmetrically provided with hinged posts, the front and rear sides of the pushing post close to the right end are symmetrically provided with middle sliders, the middle sliders are slidably connected with the, the lower extreme and the round chamber sliding connection of hinge bar, the intermediate position of hinge bar are equipped with the pivot hole, and the right side that the hinge bar is close to the top position is equipped with the sliding tray, the pivot hole rotates with the pivot to be connected, lateral wall fixed connection around both ends and the first rectangle chamber of pivot, sliding block and sliding tray sliding connection, the right side of sliding block is articulated with the left end of push rod, the right side and the circular groove sliding connection that rotates of push rod.

Preferably, the circle center of the circular limiting groove is located on the central axis of the first threaded hole, and the T-shaped circular groove is a semicircular groove.

Preferably, the inner cavity is internally provided with a second spring, the left end of the second spring is fixedly connected with the left side wall of the inner cavity, and the right end of the second spring is fixed with the left end of the pushing column.

Preferably, the lower extreme of organism is equipped with the base, the base passes through bolted connection with the organism, the motor passes through the motor cushion and is connected with the organism, and the motor passes through bolted connection with the motor cushion.

The invention has the beneficial effects that: by adopting the rice threshing machine convenient to switch, if power is cut off during rice threshing, the fixed shaft on the threshing cylinder can be separated from the first belt pulley through the electric switching mechanism, and then the fixed shaft is mechanically connected with the linkage wheel through the pedal switching mechanism, so that the rice threshing machine can continuously work after power is cut off, and the free switching between manual power and power driving is realized.

Drawings

The contents of the drawings and the reference numerals in the drawings are briefly described as follows:

FIG. 1 is a schematic view showing a structure of a rice thresher which is easily switched;

fig. 2 is a front view of the threshing cylinder of fig. 1;

FIG. 3 is a plan sectional view of the foot operated switching mechanism of FIG. 1;

FIG. 4 is a schematic view of the connection of the pusher block and the connecting rod of FIG. 3;

FIG. 5 is a side view of the sun gear of FIG. 3;

FIG. 6 is a top view of the pusher block of FIG. 3;

FIG. 7 is a plan sectional view of the electric switching mechanism of FIG. 1;

FIG. 8 is an enlarged view of the hinge rod and hinge post of FIG. 7;

FIG. 9 is a top view of the push post of FIG. 7;

fig. 10 is a side view of the linkage post of fig. 7.

Wherein, 1-base, 2-machine body, 3-motor, 4-second belt pulley, 5-belt, 6-pedal switching mechanism, 7-electric switching mechanism, 8-linkage wheel, 9-pedal, 10-linkage rod, 11-threshing roller, 12-fixed shaft, 61-fixed frame, 62-linkage shaft, 63-lower notch, 64-upper notch, 65-internal gear disc, 66-limit end, 67-circular groove, 68-gear groove, 69-switching groove, 610-gear shaft, 611-cylindrical gear, 612-central gear, 613-rectangular groove, 614-screw rod, 615-first threaded hole, 616-right angle bracket, 617-circular limit groove, 618-switching plate, 619-a first pushing block, 620-T-shaped circular grooves, 621-T-shaped sliding blocks, 622-inner positioning blocks, 623-a first positioning groove, 624-a buffer cavity, 625-a first spring, 626-a connecting rod, 627-a frame hole, 628-a wing plate, 629-a wing edge groove, 71-a first belt pulley, 72-a rotating block, 73-a second threaded hole, 74-a circular rotating groove, 75-a push rod, 76-a sliding block, 77-a sliding groove, 78-a hinge rod, 79-a rotating shaft, 710-a first rectangular cavity, 711-a pushing column, 712-a middle sliding groove, 713-a side sliding groove, 714-a second pushing block, 715-an inner cavity, 716-a circular hole, 717-a linkage column, 718-a limiting block, 719-an inserting rod, 720-an inserting groove, 721-second spring, 722-middle slide, 723-side slide, 724-round cavity, 725-hinge column.

Detailed Description

The following embodiments are provided to describe the embodiments of the present invention, and to further describe the detailed description of the embodiments of the present invention, such as the shapes, configurations, mutual positions and connection relationships of the components, the functions and operation principles of the components, the manufacturing processes and operation methods, etc., so as to help those skilled in the art to more fully, accurately and deeply understand the inventive concept and technical solutions of the present invention.

As shown in fig. 1 to 10, a rice thresher convenient for switching comprises a machine body 2 and a separation roller 11, wherein the front and rear end surfaces of the lower right side of the machine body 2 are connected with the top ends of the front and rear support legs of a pedal 9 through a rotating shaft, the left upper end of the machine body 2 is provided with a motor 3, the output shaft of the motor 3 is connected with a second belt pulley 4 in a key manner, the second belt pulley 4 is connected with an electric switching mechanism 7 through a belt 5, the central position of the left and right ends of the separation roller 11 is fixedly connected with one end of a fixed shaft 12, the other end of the fixed shaft 12 is movably connected with a pedal switching mechanism 6, the fixed shaft 12 is rotatably connected with the upper right end of the interior of the machine body 2, the fixed shaft 12 on the right side of the separation roller 11 is movably connected with the electric switching mechanism 7, the exterior of the pedal switching mechanism 6 is connected with a, the lower end of the linkage rod 10 is connected with the supporting leg of the pedal plate 9 through a positioning shaft.

In this embodiment, the pedal switching mechanism 6 includes a fixed frame 61, a linkage shaft 62, an internal gear 65, a central gear 612, a right-angle bracket 616, a first pushing block 619, a T-shaped slider 621 and a connecting rod 626, wherein the ends of the left and right legs of the fixed frame 61 are fixedly connected to the outer side surface of the machine body 2, a frame hole 627 is formed in the middle position of the top of the fixed frame 61, rectangular grooves 613 are formed in the left and right sides of the inner side wall of the frame hole 627, wing plates 628 are symmetrically formed on the edges of the upper and lower sides of the frame hole 627, gear grooves 68 penetrating the top of the fixed frame 61 are symmetrically formed in the left and right sides of the frame hole 627, the middle position of the gear groove 68 is communicated with the rectangular groove 613 through a switching groove 69, a gear shaft 610 is formed on the upper side inside of the gear groove 68, inner positioning blocks 622 are symmetrically formed in the switching groove 69 near the rectangular groove 613, the gear shaft 610 is rotatably connected with a cylindrical gear 611, the outer end face of the fixed shaft 12 is symmetrically provided with an upper notch 64, the upper end face of the linkage shaft 62 is symmetrically provided with a lower notch 63 corresponding to the upper notch 64, the lower end of the linkage shaft 62 is connected with a linkage wheel 8 in a key manner, the fixed shaft 12 and the linkage shaft 62 are both provided with wing edge grooves 629 rotatably connected with wing plates 628, the central position of the inner side face of the inner gear disc 65 is meshed with the cylindrical gear 611, the left side and the right side of the inner side face of the inner gear disc 65 are symmetrically provided with limit end heads 66, the top of the limit end heads 66 is rotatably connected with a circular groove 67 arranged at the top of the linkage shaft 62, the central gear 612 is positioned at the central position of the gear groove 68, the middle position of the central gear 612 is provided with a first threaded hole 615, the left side and the right side of the central gear 612 are symmetrically, the other end of the right-angle support 616 is fixedly connected with the side wall of the switching groove 69, the upper and lower sides of the first pushing block 619 are symmetrically provided with first positioning grooves 623, the side surface of the first pushing block 619 close to the rack hole 627 is semicircular and is provided with a T-shaped circular groove 620, the side surface of the first pushing block 619 close to the gear groove 68 is symmetrically provided with a buffer cavity 624, the inner positioning block 622 is slidably connected with the first positioning groove 623, the end parts of the upper and lower support legs of the connecting rod 626 are slidably connected with the buffer cavity 624, the top center position of the connecting rod 626 is fixedly connected with one end of the lead screw 614, the lead screw 614 is in threaded connection with the first threaded hole 615, a first spring 625 is arranged inside the buffer cavity 624, one end of the first spring 625 is fixedly connected with the bottom of the buffer cavity 624, the other end of the first spring 625 is fixedly connected with the end part of the support leg of the connecting rod 626, and the end part of the T-shaped sliding block, the T-shaped end of the T-shaped slider 621 is slidably connected with the T-shaped circular groove 620.

In this embodiment, the electric switching mechanism 7 includes a first belt pulley 71, a rotating block 72, a sliding block 76, a hinge rod 78, a pushing column 711 and a second pushing block 714, the first belt pulley 71 is connected to the second belt pulley 4 through a belt 5, a circular hole 716 is disposed in the middle of the first belt pulley 71, two limiting blocks 718 are symmetrically disposed on the left and right sides of the first belt pulley 71, slots 720 are symmetrically disposed on the upper and lower sides of the right end surface of the first belt pulley 71, the first belt pulley 71 is rotatably connected to the fixing shaft 12 through the circular hole 716, the limiting blocks 718 are fixedly connected to the outer surface of the fixing shaft 12, the inner side surface of the limiting blocks 718 is connected to the first belt pulley 71 in a contacting manner, the rotating block 72 is located on the right side of the first belt pulley 71, a first rectangular cavity 710 is disposed on the fixing shaft 12 between the rotating block 72 and the first belt pulley 71, a, the center axis position of rotatory piece 72 is equipped with second screw hole 73, rotatory piece 72 is through second screw hole 73 and fixed axle 12 threaded connection, the intermediate position of lateral wall is equipped with well spout 712 around first rectangle chamber 710, the upper and lower bilateral symmetry of lateral wall is equipped with side spout 713 around first rectangle chamber 710, the upper and lower bilateral symmetry of second promotion piece 714 left end edge is equipped with linkage post 717, the inside of second promotion piece 714 is equipped with inner chamber 715, the bottom of linkage post 717 and the outer surface fixed connection of second promotion piece 714, the left side of linkage post 717 is equipped with the inserted bar 719 corresponding with slot 720, the symmetry is equipped with side slider 723 on the front and back side of linkage post 717, inserted bar 719 and linkage post 717 fixed connection, side slider 723 and side spout 713 sliding connection, the left end and the inner chamber 715 sliding connection of promotion post 711 are close to the upper and lower bilateral symmetry of right-hand member and are equipped with post 725, the front side and the back side of the pushing column 711 near the right end are symmetrically provided with middle sliders 722, the middle sliders 722 are in sliding connection with the middle sliding grooves 712, one end of the hinge column 725 is hinged to the pushing column 711, the other end of the hinge column 725 is provided with a circular cavity 724, the lower end of the hinge rod 78 is in sliding connection with the circular cavity 724, the middle position of the hinge rod 78 is provided with a rotating shaft hole, the right side of the hinge rod 78 near the upper position is provided with a sliding groove 77, the rotating shaft hole is in rotating connection with a rotating shaft 79, the two ends of the rotating shaft 79 are fixedly connected with the front side wall and the back side wall of the first rectangular cavity 710, the sliding block 76 is in sliding connection with the sliding groove 77, the right side of the sliding block 76 is hinged to the left end of.

In this embodiment, the circle center of the circular limiting groove 617 is located on the central axis of the first threaded hole 615, and the T-shaped circular groove 620 is a semicircular groove.

In this embodiment, a second spring 721 is disposed inside the inner cavity 715, a left end of the second spring 721 is fixedly connected to a left sidewall of the inner cavity 715, and a right end of the second spring 721 is fixed to a left end of the pushing column 711.

In addition, the lower extreme of organism 2 is equipped with base 1, base 1 passes through bolted connection with organism 2, motor 3 passes through the motor cushion and is connected with organism 2, and motor 3 passes through bolted connection with the motor cushion.

The working process and principle are as follows: if a manual driving device and a power driving device are simultaneously installed on one rice thresher, the manual driving device and the power driving device cannot be switched, so that the power driving device is additionally driven to rotate when the manual driving device is used, the manual driving device is driven to act when the power driving device is used, the waste of electric power and manpower is caused, and great inconvenience is brought to the threshing work when the manual driving device is used in practical use, in the rice thresher convenient to switch, when the power supply is normal, the rice thresher is driven by the electric power, the insertion rod 719 is clamped in the insertion groove 720 at the moment, the switching plate 618 is positioned in the rectangular groove 613, the switching plate 613 is completely separated from the upper notch 64 and the lower notch 63, so that the first belt pulley 71 is driven to rotate by the motor 3 through the second belt pulley 4 and the belt 5, when the first belt pulley 71 rotates, the fixed shaft 12 is driven to rotate through the insertion rod 719 and the linkage rod 717, the fixed shaft 12 rotates the detaching roller 11 to complete the rice detaching operation, when the power supply is abnormal, the power is cut off first to prevent the power from being supplied again suddenly at the time of switching, then the rotating block 72 is rotated to move the rotating block 72 to the left side of the fixed shaft 12, the push rod 75 rotates in the circular rotating groove 74 on the one hand and moves along with the movement of the rotating block 72 on the other hand, since the push rod 75 is hinged to the sliding block 76, when the push rod 75 moves to the left, the sliding block 76 is pulled to slide on the sliding groove 77, and simultaneously the upper end of the hinge rod 78 is pulled to rotate around the rotating shaft 79 in the direction of approaching the first belt pulley 71, and at this time, the lower end of the hinge rod 78 rotates reversely and slides downwards in the circular cavity 724, during the sliding of the lower end of the hinge rod 78, the hinge rod 725 moves along with the rotation of the hinge rod 78, and when the hinge rod 725 moves, meanwhile, the middle sliding block 722 slides in the middle sliding groove 722 to play a role of stabilizing the pushing column 711, when the pushing column 711 moves rightwards, the left end of the pushing column 711 slides in the inner cavity 715, the second spring 721 is pulled, when the second spring 721 is pulled to be in a tight state, at this time, under the pulling force of the second spring 721, the pushing block 714 is pulled, the inserted rod 719 is moved out of the slot 720 through the linkage column 717, after the completion, the internal gear discs 65 at two ends are rotated to drive the cylindrical gear 611 to rotate on the gear shaft 610, and further drive the central gear 612 to rotate, the right-angle bracket 616 plays a role of stabilizing the central gear 612, so that the central gear 612 rotates normally, when the central gear 612 rotates, the lead screw 614 is driven to move towards the direction close to the rack hole 627 through the first threaded hole, and further, two ends of the supporting legs of the connecting rod 626 are driven to slide in the buffer cavity 624 and compress the first spring 625, and when the first spring 625, the first pushing block 619 will drive the switching plate 618 to move towards the upper notch 64 and the lower notch 63 by the elastic force of the first spring 625, when the first pushing blocks 619 on the left and right sides of the frame hole 627 contact each other, the rotation of the inner gear wheel 65 is stopped, at this time, the switching plate 618 cannot be clamped to the upper notch 64 and the lower notch 63 because the upper notch 64 and the lower notch 63 may not be aligned, at this time, the threshing roller 11 is slowly rotated, when the upper notch 64 and the lower notch 63 are rotated to be aligned, the switching plate 618 is clamped to the upper notch 64 and the lower notch 63 by the elastic force of the first spring 625, at this time, the fixed shaft 12 and the linkage shaft 62 are linked, so that the pedal 9 is manually treaded down to drive the linkage wheel 8 to rotate by the linkage rod 10, and further drive the threshing roller 11 to rotate, and the free switching of manual and power driving is realized.

Based on the above, when the rice threshing machine with the convenient switching function is adopted, if power is cut off during rice threshing, the fixed shaft on the threshing cylinder can be separated from the first belt pulley through the electric switching mechanism, and then the fixed shaft is mechanically connected with the linkage wheel through the pedal switching mechanism, so that the rice threshing machine can continuously work after power is cut off, and the free switching between manual power driving and power driving is realized.

The invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the precise form disclosed, and that various insubstantial modifications of the inventive concepts and solutions, or their direct application to other applications without such modifications, are intended to be covered by the scope of the invention. The protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A rice thresher convenient to switch is characterized in that: comprises a machine body (2) and a separation roller (11), wherein the front and rear end surfaces of the right lower side of the machine body (2) are connected with the top ends of the front and rear support legs of a pedal plate (9) through a rotating shaft, a motor (3) is arranged at the left upper end of the machine body (2), an output shaft of the motor (3) is in key connection with a second belt pulley (4), the second belt pulley (4) is connected with an electric switching mechanism (7) through a belt (5), the central positions of the left and right ends of the separation roller (11) are fixedly connected with one end of a fixed shaft (12), the other end of the fixed shaft (12) is movably connected with the pedal switching mechanism (6), the fixed shaft (12) is rotatably connected with the inner right upper end of the machine body (2), the fixed shaft (12) at the right side of the separation roller (11) is movably connected with the electric switching mechanism (7), and the outer part, the position, close to the edge, of the outer surface of the linkage wheel (8) is connected with the upper end of a linkage rod (10) through a positioning shaft, and the lower end of the linkage rod (10) is connected with a supporting leg of a pedal (9) through a positioning shaft;

the pedal switching mechanism (6) comprises a fixed rack (61), a linkage shaft (62), an inner gear disc (65), a central gear (612), a right-angle support (616), a first pushing block (619), a T-shaped sliding block (621) and a connecting rod (626), wherein the end parts of the left and right supporting legs of the fixed rack (61) are fixedly connected with the outer side surface of the machine body (2), a rack hole (627) is formed in the middle position of the top part of the fixed rack (61), rectangular grooves (613) are formed in the left and right sides of the inner side wall of the rack hole (627), wing plates (628) are symmetrically arranged on the edges of the upper side and the lower side of the rack hole (627), gear grooves (68) penetrating through the top part of the fixed rack (61) are symmetrically arranged on the left side and the right side of the rack hole (627), the middle position of the gear grooves (68) is communicated with the rectangular grooves (613) through a switching groove (69), and a, the inner side wall of the switching groove (69) close to the rectangular groove (613) is symmetrically provided with inner positioning blocks (622), two ends of the gear shaft (610) are fixedly connected with the inner side wall of the gear groove (68), the gear shaft (610) is rotatably connected with the cylindrical gear (611), the outer end face of the fixed shaft (12) is symmetrically provided with upper notches (64), the upper end face of the linkage shaft (62) is symmetrically provided with lower notches (63) corresponding to the upper notches (64), the lower end of the linkage shaft (62) is in key connection with the linkage wheel (8), the fixed shaft (12) and the linkage shaft (62) are respectively provided with a wing edge groove (629) rotatably connected with a wing plate (628), the central position of the inner side face of the inner gear disc (65) is meshed with the cylindrical gear (611), the left side and the right side of the inner side face of the inner gear disc (65) are symmetrically provided with limiting end heads (66), and the top of the limiting end heads (66) is rotatably connected with a circular groove (67, the central gear (612) is located at the center of the gear groove (68), a first threaded hole (615) is formed in the middle of the central gear (612), circular limiting grooves (617) are symmetrically formed in the left side surface and the right side surface of the central gear (612), one end of the right-angle support (616) is rotatably connected with the circular limiting grooves (617), the other end of the right-angle support (616) is fixedly connected with the side wall of the switching groove (69), first positioning grooves (623) are symmetrically formed in the upper side surface and the lower side surface of the first pushing block (619), the side surface, close to the rack hole (627), of the first pushing block (619) is semicircular, a T-shaped circular groove (620) is formed in the side surface, close to the gear groove (68), of the first pushing block (619) is symmetrically provided with a buffer cavity (624), the inner positioning block (622) is slidably connected with the first positioning grooves (623), the end portions of the upper supporting leg and the lower leg of the connecting rod (626) are slidably connected with, the top center of the connecting rod (626) is fixedly connected with one end of a screw rod (614), the screw rod (614) is in threaded connection with a first threaded hole (615), a first spring (625) is arranged inside the buffer cavity (624), one end of the first spring (625) is fixedly connected with the bottom of the buffer cavity (624), the other end of the first spring (625) is fixedly connected with the end of a supporting leg of the connecting rod (626), the end of the T-shaped sliding block (621) is fixedly connected with the side center of the switching plate (618), and the T-shaped end of the T-shaped sliding block (621) is in sliding connection with the T-shaped circular groove (620);

the electric switching mechanism (7) comprises a first belt pulley (71), a rotating block (72), a sliding block (76), a hinged rod (78), a pushing column (711) and a second pushing block (714), wherein the first belt pulley (71) is connected with a second belt pulley (4) through a belt (5), a circular hole (716) is formed in the middle of the first belt pulley (71), limiting blocks (718) are symmetrically arranged on the left side and the right side of the first belt pulley (71), slots (720) are symmetrically arranged on the upper side and the lower side of the right end face of the first belt pulley (71), the first belt pulley (71) is rotatably connected with a fixed shaft (12) through the circular hole (716), the limiting blocks (718) are fixedly connected with the outer surface of the fixed shaft (12), the inner side face of the limiting blocks (718) is in contact connection with the first belt pulley (71), and the rotating block (72) is located on the right side of the first belt, a first rectangular cavity (710) is arranged on a fixed shaft (12) between a rotating block (72) and a first belt pulley (71), a circular rotating groove (74) is formed in the right side face of the rotating block (72), a second threaded hole (73) is formed in the central axis position of the rotating block (72), the rotating block (72) is in threaded connection with the fixed shaft (12) through the second threaded hole (73), a middle sliding groove (712) is formed in the middle position of the front side wall and the rear side wall of the first rectangular cavity (710), side sliding grooves (713) are symmetrically formed in the upper side and the lower side of the front side wall and the lower side of the rear side wall of the first rectangular cavity (710), linkage columns (717) are symmetrically formed in the upper side and the lower side of the left end edge of the second pushing block (714), an inner cavity (715) is arranged inside the second pushing block (714), the bottom ends of the linkage columns (717) are fixedly connected with the outer surface of the second pushing block (714), and inserting rods (719, the front side and the rear side of the linkage column (717) are symmetrically provided with side sliding blocks (723), the inserted link (719) is fixedly connected with the linkage column (717), the side sliding blocks (723) are slidably connected with side sliding grooves (713), the left end of the pushing column (711) is slidably connected with an inner cavity (715), the upper side and the lower side of the pushing column (711) close to the right end are symmetrically provided with hinged columns (725), the front side and the rear side of the pushing column (711) close to the right end are symmetrically provided with middle sliding blocks (722), the middle sliding blocks (722) are slidably connected with the middle sliding grooves (712), one end of each hinged column (725) is hinged with the pushing column (711), the other end of each hinged column (725) is provided with a circular cavity (724), the lower end of each hinged rod (78) is slidably connected with the circular cavity (724), a rotating shaft hole is arranged in the middle position of each hinged rod (78), and the right side of each hinged rod (78) close to, the pivot hole rotates with pivot (79) to be connected, the both ends of pivot (79) and the front and back lateral wall fixed connection in first rectangle chamber (710), sliding block (76) and sliding tray (77) sliding connection, the right side of sliding block (76) is articulated with the left end of push rod (75), the right side and the circular groove (74) sliding connection that rotates of push rod (75).

2. The rice thresher facilitating switching according to claim 1, wherein: the circle center of the circular limiting groove (617) is located on the central axis of the first threaded hole (615), and the T-shaped circular groove (620) is a semicircular groove.

3. The rice thresher facilitating switching according to claim 1, wherein: the inner part of the inner cavity (715) is provided with a second spring (721), the left end of the second spring (721) is fixedly connected with the left side wall of the inner cavity (715), and the right end of the second spring (721) is fixed with the left end of the pushing column (711).

4. The rice thresher facilitating switching according to claim 1, wherein: the lower extreme of organism (2) is equipped with base (1), base (1) passes through bolted connection with organism (2), motor (3) pass through the motor cushion and are connected with organism (2), and motor (3) pass through bolted connection with the motor cushion.