Threshing device for rice harvester

Abstract

The invention discloses a threshing device for a rice harvester, and relates to the technical field of harvesters, the threshing device for the rice harvester comprises a mounting frame, a rotating shaft and a plurality of groups of discs fixed outside the rotating shaft, and a plurality of groups of long rods are fixedly arranged outside the discs; through the designed cleaning mechanism, after stems and leaves in some rice and weeds in a rice field are wound on threshing teeth in the rice threshing process, pushing rings arranged on the threshing teeth synchronously move to push the wound stems and leaves and weeds to the outer side, so that the stems and leaves and the weeds are separated from the threshing teeth; the pushing ring cuts off the stems, the leaves and the weeds through the annular blades in the process of pushing the stems, the leaves and the weeds outwards, so that the wound stems, the leaves and the weeds can be quickly separated from the threshing teeth, the stems, the leaves and impurities on the threshing teeth can be conveniently cleaned, and the threshing effect and the threshing quality of the threshing device on rice are improved; and automatic cleaning can be carried out without shutdown, and cleaning is convenient and fast.

Description

Technical Field

[0001] The invention belongs to the technical field of harvesters, in particular to a threshing device for a rice harvester. Background Art

[0002] Rice harvesters can harvest rice on a large scale, significantly improving the harvesting efficiency and reducing the time and labor of manual harvesting. The main function of the harvester's threshing drum is to complete the threshing operation and improve the harvesting efficiency and quality. During the threshing process, the harvester will thresh through the internal threshing drum. The threshing drum is one of the core components of the harvester. The whole rice is sent into the threshing drum, and the rotating threshing drum drives the threshing teeth to rotate to separate the stems and leaves from the ears of rice to complete the threshing of the rice.

[0003] A threshing drum device for a rice harvester is disclosed in a Chinese patent with application number 202022166531.1, which solves the problem that the internal structure of the threshing drum leads to incomplete threshing of rice and the threshing rod inside the drum is easily bent due to long-term use. However, during the use of the above-mentioned threshing drum, the stems and leaves of rice or the weeds in the rice field are easily entangled on the outside of the threshing teeth, resulting in reduced threshing efficiency and threshing quality, and the machine needs to be manually stopped for cleaning. For this reason, we propose a threshing device for a rice harvester. Summary of the invention

[0004] The object of the present invention is to provide a threshing device for a rice harvester to solve the technical problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a threshing device for a rice harvester, comprising a mounting frame, a rotating shaft, and a plurality of discs fixed to the outside of the rotating shaft, wherein a plurality of long rods are fixedly arranged on the outside of the discs, and a plurality of threshing teeth are fixedly arranged on the outside of the long rods, and further comprising:

[0006] A cleaning mechanism is arranged outside the rotating shaft and is used to clean the stems, leaves and weeds entangled outside the threshing teeth;

[0007] The cleaning mechanism comprises an outer gear ring and a push ring sleeved outside the threshing teeth, and an annular blade is fixedly arranged on the push ring.

[0008] Preferably, a connecting bearing is sleeved on the outside of the rotating shaft, and an outer gear ring is fixed on the outside of the connecting bearing;

[0009] A reduction motor is fixedly arranged on the outside of the rotating shaft, and a driving wheel is fixedly arranged on the working end of the reduction motor.

[0010] Preferably, the outer portion of the outer gear ring is meshed with a gear, the outer portion of the gear is meshed with a rack, and the outer portion of the rack is respectively provided with a first circular plate and a second circular plate;

[0011] A supporting bearing is arranged on the side surface of the gear, a side ring is fixedly arranged on the outside of the rotating shaft, and a plurality of connecting frames are fixedly arranged on the outside of the side ring.

[0012] Preferably, a long strip is fixedly provided at the end of the rack, and a conductive slip ring is externally provided at one end of the rotating shaft.

[0013] Preferably, an auxiliary cutting assembly is provided on the top of the mounting frame for cutting off the stems, leaves and weeds that are cross-entangled between the multiple groups of threshing teeth;

[0014] The auxiliary cutting assembly includes a screw rod and a plurality of cutting blades evenly distributed along the length direction of the screw rod, and a support plate is fixedly arranged on the inner wall of the cutting blade;

[0015] Two groups of vertical screws are fixedly arranged on the cutting blade, the ends of the vertical screws pass through the interior of the support plate, and the exterior of the vertical screws is connected with locking nuts through threads.

[0016] Preferably, a plurality of groups of nut seats are arranged outside the screw rod, an extension plate is fixedly arranged on the surface of the nut seat, and a connecting ring frame is slidably arranged outside the extension plate.

[0017] Preferably, a long plate is fixedly provided on the outside of the connecting ring frame, support blocks are provided on the outside of both ends of the screw rod, and a pushing cylinder is fixedly provided on the top of the support block.

[0018] Preferably, a movable circular strip is fixedly arranged on the surface of the support block, a limiting plate is arranged inside the movable circular strip, and both ends of the limiting plate are fixedly connected to the support block;

[0019] A plurality of groups of limiting rings are sleeved and fixed on the outside of the screw rod, and a driving motor is fixedly arranged on the mounting frame.

[0020] Preferably, the long strip is provided with a cutting piece for cutting off the stems, leaves and weeds entangled on the long rod when the push ring moves;

[0021] The cutting piece comprises a plurality of mounting strips arranged on the long strip, the mounting strips are fixedly provided with oblique blades, and the surface of the mounting strips is fixedly provided with two sets of upper concave plates;

[0022] A plurality of groups of concave plates are fixedly arranged on the surface of the long strip, and T-shaped screw rods are arranged on the concave plates. The ends of the T-shaped screw rods are connected with fixing nuts through threads.

[0023] Preferably, a fixing frame is provided on one side of the mounting frame, the conductive slip ring is located inside the fixing frame, an arc-shaped screen is fixedly provided on the inner wall of the mounting frame, and a feeding spiral cone is fixedly provided on the other end of the rotating shaft.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The cleaning mechanism of the present invention is designed. When some stems and leaves of rice and weeds in the rice field are entangled on the threshing teeth during the threshing process, the push ring arranged on the threshing teeth moves synchronously to push the entangled stems and leaves and weeds outward, so that the stems and leaves and weeds are separated from the threshing teeth. In the process of pushing the stems and leaves and weeds outward, the push ring cuts them off with an annular blade, so that the entangled stems and leaves and weeds can be quickly separated from the threshing teeth, and the stems and leaves and impurities on the threshing teeth can be cleaned conveniently, thereby increasing the threshing effect and threshing quality of the threshing device for rice. In addition, the threshing can be automatically performed without stopping the machine, and the cleaning is convenient.

[0026] (2) The auxiliary cutting component designed in the present invention can drive the stems, leaves and weeds that are cross-entangled on the multiple groups of threshing teeth to be pushed outward when some stems, leaves and weeds are cross-entangled between the multiple groups of threshing teeth during use. During this period, the stems, leaves and weeds that are cross-entangled between the two groups of threshing teeth are auxiliary cut by the cutting blades. The multiple groups of cutting blades can be repeatedly moved in the left and right directions at the position between the two corresponding groups of threshing teeth, thereby further improving the cleaning effect of the entangled stems, leaves and weeds.

[0027] (3) The cutting piece designed in the present invention can drive the inclined blade to move outward to cut off the stems, leaves and weeds wrapped around the outer walls of the multiple groups of long rods through the movement of the long strips, thereby cutting off the stems, leaves and weeds wrapped around the outside of the long rods, and further reducing the influence of the stems, leaves and weeds on the separation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the disc and the outer gear ring of the present invention;

[0031] Figure 4 It is a left-side structural schematic diagram of the disc and the outer gear ring of the present invention;

[0032] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of the middle part A;

[0033] Figure 6 It is a schematic diagram of the threshing teeth and long rod structure of the present invention;

[0034] Figure 7 It is a schematic diagram of the long rod and the support bearing structure of the present invention;

[0035] Figure 8 It is a right view structural diagram of the long rod and the rack of the present invention;

[0036] Fig. 9 For the present invention Figure 8 The enlarged structural diagram of the middle B part;

[0037] Fig.10 It is a left-side structural schematic diagram of the outer gear ring of the present invention;

[0038] Fig.11 It is a right side structural schematic diagram of the outer gear ring of the present invention;

[0039] Fig.12 It is a schematic diagram of the structure of the auxiliary cutting component of the present invention;

[0040] Fig.13 It is a bottom view structural diagram of the support block and the screw rod of the present invention;

[0041] Fig.14 It is a schematic diagram of the mounting frame and the arc-shaped screen structure of the present invention;

[0042] In the figure: 100, fixed frame; 101, rotating shaft; 102, disc; 103, long rod; 104, threshing teeth; 105, feeding spiral cone; 106, mounting frame; 107, arc screen; 200, conductive slip ring; 201, outer gear ring; 202, reduction motor; 206, connecting frame; 207, side ring; 208, rack; 209, first circular plate; 210, gear; 211, second circular plate; 212, annular blade; 213, support bearing; 214, push ring; 216, connecting bearing; 217, drive Wheel; 300, screw rod; 301, limiting ring; 302, cutting blade; 303, support plate; 304, moving circular strip; 305, limiting plate; 306, nut seat; 307, connecting ring frame; 308, extension plate; 309, driving motor; 310, support block; 311, long plate; 312, pushing cylinder; 313, vertical screw; 314, locking nut; 400, oblique blade; 401, long strip; 402, fixing nut; 403, mounting strip; 404, upper concave plate; 405, T-shaped screw; 406, lower concave plate. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.10 and Fig.11 The present invention provides a technical solution: a threshing device for a rice harvester, comprising a mounting frame 106, a rotating shaft 101 and a plurality of discs 102 fixed to the outside of the rotating shaft 101, a plurality of long rods 103 fixedly arranged on the outside of the discs 102, threshing teeth 104 fixed on the long rods 103, a plurality of threshing teeth 104 fixedly arranged on the outside of the long rods 103, the threshing teeth 104 can beat rice grains off the rice, and also comprises a cleaning mechanism, the cleaning mechanism comprises an outer gear ring 201 and a push ring 214 sleeved on the outside of the threshing teeth 104, and an annular blade 212 is fixedly arranged on the push ring 214;

[0046] The outer sleeve of the rotating shaft 101 is provided with a connecting bearing 216, and the outer gear ring 201 can be supported by the connecting bearing 216. The outer gear ring 201 is fixed to the outside of the connecting bearing 216. The outer shaft 101 is fixedly provided with a reduction motor 202, and the reduction motor 202 can drive the outer gear ring 201 to rotate. The working end of the reduction motor 202 is fixedly provided with a driving wheel 217, and the outer wall of the driving wheel 217 is in contact with the outer wall of the outer gear ring 201.

[0047] The outer part of the outer gear ring 201 is meshed with a gear 210, which is meshed with the outer gear ring 201 and the rack 208 at the same time. The outer part of the gear 210 is meshed with a rack 208, and the rack 208 reciprocates in the first circular plate 209 and the second circular plate 211 when moving. The first circular plate 209 and the second circular plate 211 are slidably arranged on the outer part of the rack 208;

[0048] A support bearing 213 is provided on the side of the gear 210, a side ring 207 is fixedly provided on the outside of the rotating shaft 101, and multiple sets of connecting frames 206 are fixedly provided on the outside of the side ring 207. The first circular plate 209 and the support bearing 213 are fixed on the connecting frame 206, the second circular plate 211 is fixed on the long rod 103, the end of the rack 208 is fixedly provided with a long strip 401, and the push ring 214 is fixed on the long strip 401. A conductive slip ring 200 is provided on the outside of one end of the rotating shaft 101, and the conductive slip ring 200 can reduce the speed of the rotating shaft 101 in the rotating state. The speed reduction motor 202 can also be energized stably, thereby driving the outer gear ring 201 to rotate. A through groove is opened inside the rotating shaft 101. The conductive slip ring 200 is fixed on the fixed frame 100, and the conductive slip ring 200 is composed of an internal slip ring rotor and a slip ring stator outside the slip ring rotor. The slip ring stator is fixed on the fixed frame 100, and the slip ring rotor is fixed on the rotating shaft 101. The external wires are fixed on one side of the slip ring stator, and the wires on the other side of the slip ring rotor are fixedly connected to the speed reduction motor 202 through the through groove to supply power to the speed reduction motor 202.

[0049] The cleaning mechanism of the present invention is designed. When some stems and leaves of rice and weeds in the rice field are entangled on the threshing teeth 104 during the threshing process, the push ring 214 arranged on the threshing teeth 104 moves synchronously to push the entangled stems and leaves and weeds outward, so that the stems and leaves and weeds are separated from the threshing teeth 104. In addition, the push ring 214 cuts off the stems and leaves and weeds through the annular blade 212 during the process of pushing the stems and leaves and weeds outward, so that the entangled stems and leaves and weeds can be quickly separated from the threshing teeth 104, and the stems and leaves and impurities on the threshing teeth 104 can be cleaned conveniently, thereby increasing the threshing effect and threshing quality of the threshing device on rice. In addition, automatic cleaning can be performed without stopping the machine, and the cleaning is convenient.

[0050] When in use, when stems, leaves and weeds are entangled outside the threshing teeth 104, the reduction motor 202 is started, the working end drives the driving wheel 217 to rotate, the driving wheel 217 drives the outer gear ring 201 to rotate, and then the rack 208 is driven to move outward through the meshing action of the outer gear ring 201 and the gear 210, and then the long strip 401 fixed to the rack 208 is driven to move, and the long strip 401 drives the push ring 214 on the threshing teeth 104 to move outward, so that the stems, leaves and weeds entangled outside the threshing teeth 104 are removed. The stems, leaves and weeds on the teeth 104 are pushed outwards, and at the same time, the push ring 214 drives the annular blade 212 to move when moving outwards to cut off the stems, leaves and weeds wound around the threshing teeth 104. When the push ring 214 moves to the outer end of the threshing teeth 214, it stops, so that the wound stems, leaves and weeds can quickly break away from the threshing teeth 104, making it convenient to clean the stems, leaves and impurities on the threshing teeth 104, and then the reduction motor 202 is reversed to return the push ring 214 to its original position.

[0051] Embodiment 2

[0052] Based on Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.11 , Fig.12 and Fig.13 The top of the mounting frame 106 is provided with an auxiliary cutting assembly, which includes a screw rod 300 and a plurality of cutting blades 302 evenly distributed along the length direction of the screw rod 300. A support plate 303 is fixedly provided on the inner wall of the cutting blade 302. Two sets of vertical screws 313 are fixedly provided on the cutting blade 302. The ends of the vertical screws 313 pass through the interior of the support plate 303. The exterior of the vertical screws 313 is connected with a locking nut 314 by threads. The vertical screw 313 is fixed to the support plate 303 by the locking nut 314. When the cutting blade 302 is worn after being used for a long time, the locking nut 314 can be turned outward to unscrew it, and then the vertical screw 313 and the cutting blade 302 can be taken out. At this time, the vertical screw 313 and the cutting blade 302 can be replaced with new ones.

[0053] A plurality of nut seats 306 are arranged outside the screw rod 300, an extension plate 308 is fixedly arranged on the surface of the nut seat 306, a connecting ring frame 307 is slidingly arranged outside the extension plate 308, the connecting ring frame 307 can slide on the extension plate 308, and the end of the connecting ring frame 307 is fixedly connected to the support plate 303.

[0054] Embodiment 3

[0055] Based on Example 2, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.11 , Fig.12 and Fig.13 , a long plate 311 is fixedly provided on the outside of the connecting ring frame 307, and support blocks 310 are provided on the outside of both ends of the screw rod 300, and a pushing cylinder 312 is fixedly provided on the top of the support block 310. By pushing the cylinder 312, the support plate 303 and the cutting blade 302 can be moved in the direction close to the long rod 103, so that the cutting edge of the cutting blade 302 on the outside can contact the stems, leaves and weeds, and the working end of the pushing cylinder 312 is fixedly connected to the long plate 311, and the bottom of the support block 310 is fixedly connected to the top of the mounting frame 106. A movable paper strip 304 is also fixedly provided on the surface of the support block 310, and a limiting plate 305 is provided inside the movable paper strip 304. Both ends of the limiting plate 305 are fixedly connected to the support block 310. When the nut seat 306 moves in the palace, it will drive the movable paper strip 304 to slide on the limiting plate 305;

[0056] A plurality of limiting rings 301 are fixedly mounted on the outside of the screw rod 300, and the limiting rings 301 can enable the nut seat 306 to reciprocate between the two limiting rings 301, so that the cutting blade 302 will not accidentally touch the surface of the threshing tooth 104 when moving. A driving motor 309 is fixedly arranged on the mounting frame 106, and the working end of the driving motor 309 is fixedly connected to the end of the screw rod 300.

[0057] The auxiliary cutting component designed in the present invention can drive the stems, leaves and weeds cross-wound on the multiple groups of threshing teeth 104 to be pushed outwards when some stems, leaves and weeds are cross-wound between the multiple groups of threshing teeth 104 during use. During this period, the stems, leaves and weeds cross-wound between the two groups of threshing teeth 104 are auxiliary cut by the cutting blade 302. The multiple groups of cutting blades 302 can be repeatedly moved in the left and right directions at the position between the corresponding two groups of threshing teeth 104, thereby further improving the cleaning effect of the entangled stems, leaves and weeds.

[0058] When cleaning the stems, leaves and weeds wound around the threshing teeth 104, the two groups of pushing cylinders 312 are started to drive the long plate 311 to move in the direction close to the long rod 103, which can then drive the connecting ring frame 307 to move and slide on the extension plate 308, and the supporting plate 303 and the cutting blade 302 are driven to move in the direction close to the long rod 103 through the connecting ring frame 307. At the same time, the driving motor 309 is started to drive the screw rod 300 to rotate. At this time, the multiple groups of nut seats 306 located on the screw rod 300 move to the left, driving the cutting blade The blade 302 moves to the left side, and when it moves to the appropriate position on the left side, the driving motor 309 is reversed to move the nut seat 306 and the cutting blade 302 to the right side. When the long rod 103 and the threshing teeth 104 drive the entangled stems, leaves and weeds to rotate, the cross-entangled stems, leaves and weeds located between the two groups of threshing teeth 104 hit the cutting blade 302, and are cut off by the cutting blade 302. In this way, the stems, leaves and weeds entangled between the two groups of threshing teeth 104 can be cleaned.

[0059] Embodiment 4

[0060] Based on Example 3, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 and Fig.14, a cutting piece is provided on the long strip 401, and the cutting piece includes a plurality of mounting strips 403 provided on the long strip 401, an oblique blade 400 is fixedly provided on the mounting strip 403, and two sets of upper concave plates 404 are fixedly provided on the surface of the mounting strip 403;

[0061] A plurality of groups of lower concave plates 406 are fixedly provided on the surface of the long strip 401, on which T-shaped screws 405 are provided, and the ends of the T-shaped screws 405 pass through the interior of the lower concave plates 406 and the upper concave plates 404, and the ends of the T-shaped screws 405 are threadedly connected with fixing nuts 402, which fix the T-shaped screws 405 to the upper concave plates 404 and the lower concave plates 406.

[0062] The cutting piece designed in the present invention can drive the inclined blade 400 to move outward to cut off the stems, leaves and weeds wrapped around the outer wall of the multiple groups of long rods 103 through the movement of the long strip 401 when the outer wall of the multiple groups of long rods 103 is used, thereby cutting off the stems, leaves and weeds wrapped around the outside of the long rods 103, and further reducing the influence of the stems, leaves and weeds on the separation device.

[0063] During use, when the rack 208 moves outward, it will drive the long strip 401 to move, and then drive the mounting strip 403 and the bevel blade 400 to move. During the movement, the bevel blade 400 can contact the stems, leaves and weeds that are surrounded and entangled outside the multiple groups of long rods 103. When the bevel blade 400 is worn out after long-term use, it can be replaced. When replacing, the fixing nut 402 outside the T-shaped screw 405 is turned outward to loosen it, and then the mounting strip 403 is taken out to remove the bevel blade 400, and then the new mounting strip 403 and the bevel blade 400 can be replaced.

[0064] In this embodiment, a fixing frame 100 is provided on one side of the mounting frame 106. The fixing frame 100 and the mounting frame 106 are fixedly connected to the frame on the harvester. The conductive slip ring 200 is located inside the fixing frame 100. An arc-shaped screen 107 is fixedly provided on the inner wall of the mounting frame 106. The threshed rice grains can be screened through the arc-shaped screen 107. A feeding spiral cone 105 is fixedly provided on the other end of the rotating shaft 101. When the harvester is harvesting, the rice stems and leaves cut off from the outside will enter the threshing device through the feeding spiral cone 105.

[0065] The above embodiments are only used to illustrate the technical method 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 method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A threshing device for a rice harvester, comprising a mounting frame (106), a rotating shaft (101) and a plurality of discs (102) fixed to the outside of the rotating shaft (101), a plurality of long rods (103) fixedly arranged outside the discs (102), a plurality of threshing teeth (104) fixedly arranged outside the long rods (103), characterized in that: Also includes: A cleaning mechanism is arranged outside the rotating shaft (101) and is used to clean the stems, leaves and weeds wound around the outside of the threshing teeth (104); The cleaning mechanism comprises an outer gear ring (201) and a push ring (214) sleeved on the outside of the threshing teeth (104), and an annular blade (212) is fixedly arranged on the push ring (214).

2. A threshing device for a rice harvester according to claim 1, characterized in that: The outer sleeve of the rotating shaft (101) is provided with a connecting bearing (216), and the outer gear ring (201) is fixed to the outside of the connecting bearing (216); A reduction motor (202) is fixedly disposed on the outside of the rotating shaft (101), and a driving wheel (217) is fixedly disposed on the working end of the reduction motor (202).

3. A threshing device for a rice harvester according to claim 2, characterized in that: The outer portion of the outer gear ring (201) is meshed with a gear (210), the outer portion of the gear (210) is meshed with a rack (208), and the outer portion of the rack (208) is respectively provided with a first circular plate (209) and a second circular plate (211); A supporting bearing (213) is provided on the side of the gear (210), a side ring (207) is fixedly provided on the outside of the rotating shaft (101), and a plurality of connecting frames (206) are fixedly provided on the outside of the side ring (207).

4. A threshing device for a rice harvester according to claim 3, characterized in that: A long strip (401) is fixedly arranged at the end of the rack (208), and a conductive slip ring (200) is arranged outside one end of the rotating shaft (101).

5. The threshing device for a rice harvester according to claim 1, characterized in that: An auxiliary cutting assembly is provided on the top of the mounting frame (106) for cutting off the stems, leaves and weeds that are cross-entangled between the multiple groups of threshing teeth (104); The auxiliary cutting assembly comprises a screw rod (300) and a plurality of groups of cutting blades (302) evenly distributed along the length direction of the screw rod (300), wherein a support plate (303) is fixedly provided on the inner wall of the cutting blade (302); Two groups of vertical screws (313) are fixedly arranged on the cutting blade (302), the ends of the vertical screws (313) pass through the interior of the support plate (303), and the exterior of the vertical screws (313) is threadedly connected with a locking nut (314).

6. A threshing device for a rice harvester according to claim 5, characterized in that: A plurality of groups of nut seats (306) are arranged outside the screw rod (300), an extension plate (308) is fixedly arranged on the surface of the nut seat (306), and a connecting ring frame (307) is slidably arranged outside the extension plate (308).

7. A threshing device for a rice harvester according to claim 6, characterized in that: A long plate (311) is fixedly provided on the outside of the connecting ring frame (307), support blocks (310) are provided on the outside of both ends of the screw rod (300), and a pushing cylinder (312) is fixedly provided on the top of the support block (310).

8. The threshing device for a rice harvester according to claim 7, characterized in that: A movable circular strip (304) is fixedly arranged on the surface of the support block (310), a limiting plate (305) is arranged inside the movable circular strip (304), and both ends of the limiting plate (305) are fixedly connected to the support block (310); A plurality of sets of limiting rings (301) are sleeved and fixed on the outside of the screw rod (300), and a driving motor (309) is fixedly arranged on the mounting frame (106).

9. The threshing device for a rice harvester according to claim 4, characterized in that: The long strip (401) is provided with a cutting piece for cutting off the stems, leaves and weeds wound around the long rod (103) when the push ring (214) moves; The cutting piece comprises a plurality of groups of mounting strips (403) arranged on the long strip (401), the mounting strips (403) are fixedly provided with oblique blades (400), and the surface of the mounting strips (403) are fixedly provided with two groups of upper concave plates (404); A plurality of groups of concave plates (406) are fixedly arranged on the surface of the long strip (401), and a T-shaped screw rod (405) is arranged on the concave plate (406). The end of the T-shaped screw rod (405) is connected to a fixing nut (402) through a thread.

10. The threshing device for a rice harvester according to claim 4, characterized in that: A fixing frame (100) is arranged on one side of the mounting frame (106), the conductive slip ring (200) is located inside the fixing frame (100), an arc-shaped screen (107) is fixedly arranged on the inner wall of the mounting frame (106), and a feeding spiral cone (105) is fixedly arranged on the other end of the rotating shaft (101).

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