An electric threshing gap adjustment device based on convex gear

Abstract

The present invention relates to the technical field of threshing devices, and specifically to an electric threshing gap adjustment device based on a cam gear, comprising a main shaft, one end of the outer wall of the main shaft being fixedly connected to a threshing gap adjustment mechanism 1, the other end of the outer wall of the main shaft being fixedly connected to a threshing gap adjustment mechanism 2, one side of the threshing gap adjustment mechanism 1 being provided with a feeding screw, both ends of the main shaft being provided with a driving assembly, and a plurality of threshing components being connected between the threshing gap adjustment mechanism 1 and the threshing gap adjustment mechanism 2. In the present invention, by setting the threshing gap adjustment mechanism 1 and adjusting the gaps between the plurality of threshing components and the screen, threshing of different materials such as soybeans and corn can be conveniently completed, and the two cams are driven to rotate respectively by the driving assembly, thereby adjusting the gaps between the threshing components and the screen respectively, thereby constructing a conical threshing space, improving the threshing capacity, reducing the rate of unthreshed grains and the rate of broken grains, and improving the threshing quality.

Description

Technical Field

[0001] The invention relates to the technical field of threshing devices, and in particular to a threshing gap electric adjustment device based on a cam gear. Background Art

[0002] In the composite planting of soybean and corn, harvesting is the key link in soybean and corn production. Using traditional threshing equipment to thresh soybeans and corn, due to the large differences in the physical and mechanical properties of soybeans and corn, leads to high rates of unthreshed grains and breakage during threshing, poor threshing effect, and difficulty in ensuring threshing quality. Using soybean threshing equipment and corn threshing equipment separately for threshing requires high investment costs.

[0003] Adjusting the threshing gap is an effective way to achieve multifunctionality of the threshing device. Adjusting the threshing gap according to the material type and feed amount can effectively solve the problems of threshing device blockage and low threshing rate. The existing threshing device adjusts the threshing gap by adjusting the concave screen and adjusting the drum diameter. The method of adjusting the concave screen has the disadvantages of uneven threshing gap adjustment and small adjustment range. The method of adjusting the threshing gap by the drum, that is, drilling several adjustment holes on the width plate, manually loosening the bolts, and changing the installation position of the gear rod on the width plate to achieve threshing gap adjustment. This method cannot achieve stepless adjustment, the threshing gap adjustment is discontinuous, and 24 bolts need to be manually removed. The operation is complicated, time-consuming and labor-intensive. It is necessary to design an electric threshing gap adjustment device based on a cam gear. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide an electric threshing gap adjustment device based on a cam gear. By setting a threshing gap adjustment mechanism, by adjusting the gap between multiple threshing components and the screen, the threshing of different materials such as soybeans and corn can be conveniently completed. The two cams are driven to rotate by the driving assembly respectively, thereby adjusting the gap between the threshing components and the screen respectively, thereby constructing a conical threshing space, improving the threshing ability, reducing the unthreshed grain rate and breakage rate, improving the threshing quality, and realizing real-time adjustment of the threshing gap during the threshing process.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] 14. The electric threshing gap adjusting device according to claim 13, wherein the threshing gap adjusting mechanism is fixedly connected to one end of the outer wall of the main shaft, and the threshing gap adjusting mechanism is fixedly connected to the other end of the outer wall of the main shaft. A feeding screw is provided on one side of the threshing gap adjusting mechanism. Both ends of the main shaft are provided with a driving assembly. A plurality of threshing parts are connected between the threshing gap adjusting mechanism and the threshing gap adjusting mechanism, and the plurality of threshing parts are circularly and equidistantly distributed on the periphery of the threshing gap adjusting mechanism. The threshing gap adjusting mechanism and the threshing gap adjusting mechanism are used to drive the two ends of the threshing parts to move radially. The driving assembly is used to drive and adjust the threshing gap adjusting mechanism and the threshing gap adjusting mechanism. The threshing gap adjusting mechanism and the feeding screw are both fixedly connected to the main shaft. The threshing gap adjusting mechanism drives one end of the threshing part to move, and the threshing gap adjusting mechanism drives the other end of the threshing part to move, thereby adjusting the gap size between the threshing part and the screen.

[0007] The threshing gap adjustment mechanism further comprises a disc housing, which is fixedly sleeved on the main shaft, a disc is fixedly connected to one side of the disc housing, and the disc is fixedly sleeved on the main shaft. The inner wall of the disc housing is located on the outer side of the main shaft and is fixedly connected to three shafts at equal intervals in a ring shape. One end of the shaft is rotatably connected to a transmission gear, and an inner gear ring is provided on the outer sides of the three transmission gears. The inner gear ring is meshed with multiple transmission gears, and a cam is fixedly connected to the outer wall of the inner gear ring. The outer wall of the inner gear ring is slidably connected to multiple movable components in a ring shape at equal intervals. The movable components are slidably engaged with the cam, and the movable components are rotatably connected to the adjacent threshing components. The cam and the disc protect the internal transmission gear to prevent grain from entering the cam and getting stuck in the inner gear ring and the transmission gear.

[0008] Furthermore, the movable component includes a sliding rod, and the outer wall of the disc shell is embedded with a fixed limiting ring 1 corresponding to the positions of multiple threshing components. The sliding rod is slidably connected to the inner wall of the limiting ring 1 at the adjacent position. The top of the sliding rod is rotatably connected to one end of the adjacent threshing component. The bottom end of the sliding rod is fixedly connected to a fixed seat, and both ends of one side wall of the fixed seat are rotatably connected to clamping rods, and the two clamping rods are respectively located on both sides of the outer wall of the cam. The radial movement of the sliding rod is limited by the cam to prevent the sliding rod from moving radially outward under the centrifugal force of the threshing component, thereby facilitating the control of the gap size between the threshing component and the screen.

[0009] Furthermore, the other end of the threshing component is slidably sleeved with a rotating piece, the structure of the threshing gap adjusting mechanism 2 is the same as that of the threshing gap adjusting mechanism 1, and the rotating piece is rotatably connected to the top of the sliding rod adjacent to the threshing gap adjusting mechanism 2, so that the threshing component maintains an inclined posture, thereby making the multiple threshing components conical, so that the threshing gap is larger at the front and smaller at the back, adapting to the smaller size of the material in the threshing process, having a strong rubbing effect on the material, and improving the threshing quality.

[0010] Furthermore, the inner wall of the disc shell is fixedly connected to a limiting ring 1, and a side wall of the disc is fixedly connected to a limiting ring 2. One side of the limiting ring 1 and the limiting ring 2 are both in contact with the cam to limit the cam and prevent the cam from sliding left and right.

[0011] Furthermore, a cavity is provided at both ends of the main shaft, a center gear is provided between the three transmission gears, the center gear is rotatably sleeved with the main shaft, the center gear is meshed with multiple transmission gears, and the driving assembly is used to drive the center gear and the main shaft to rotate relative to each other. When the center gear and the main shaft rotate relative to each other, the center gear drives the cam to rotate relative to the main shaft through the transmission gear.

[0012] The cam is connected to the transmission gear of the said gear and the transmission gear of the said gear is connected with the transmission gear of the said gear.

[0013] Furthermore, the driving assembly also includes a linear motor, the other end of the ridge rod is fixedly sleeved with a moving wheel, the output end of the linear motor is fixedly connected with a clamping seat, the clamping seat is slidably connected to the moving wheel, and the linear motor does not participate in the rotation of the main shaft, so that the center of gravity of the main shaft, feeding screw, threshing gap adjustment mechanism 1, threshing gap adjustment mechanism 2 and multiple threshing components are located on the axis line of the main shaft, which facilitates rotation and reduces vibration generated during rotation.

[0014] Furthermore, a pulley is fixedly sleeved on the outer side wall of one end of the main shaft, and the pulley is used for transmission connection with an external power device.

[0015] Furthermore, the outer side wall of the cam is provided with a plurality of convex parts, and the plurality of convex parts correspond to the plurality of slide bars one by one, and when the cam rotates, the slide bars are driven to move radially by the convex parts.

[0016] Beneficial effects of the present invention:

[0017] 1. Through the setting of the threshing gap adjustment mechanism, the gap between multiple threshing components and the screen is adjusted to facilitate threshing of different materials such as soybeans and corn. The driving assembly drives two cams to rotate respectively, thereby adjusting the gap between the threshing components and the screen, thereby constructing a conical threshing space, improving the threshing capacity, reducing the rate of unthreshed grains and the rate of broken grains, and improving the threshing quality.

[0018] 2. Through the setting of the driving component, the external power device drives the main shaft to rotate through the pulley, and the main shaft drives the feeding screw, the threshing gap adjustment mechanism 1, the threshing gap adjustment mechanism 2 and multiple threshing components to rotate, so as to thresh the crops. When it is necessary to adjust the gap between multiple threshing components and the screen, the ring kit is driven to move along the main shaft through the extension and contraction of the output end of the linear motor, thereby driving the relative rotation between the central gear and the main shaft, and then the cam and the main shaft are rotated relative to each other, thereby adjusting the gap between one end of the threshing component and the screen, thereby realizing real-time adjustment of the threshing gap during the threshing process without stopping for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the threshing gap adjustment mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the middle disk shell of the present invention;

[0023] Figure 4 It is a cross-sectional structural diagram of the threshing gap adjustment mechanism in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the driving component in the present invention;

[0025] Figure 6 This is a schematic structural diagram of one end of the rib rod in the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the active components in the present invention;

[0027] Figure 8 It is a schematic structural diagram of the threshing component in the present invention.

[0028] In the figure: 100, main shaft; 110, pulley; 120, long groove; 200, feeding screw; 300, threshing gap adjustment mechanism 1; 310, disc housing; 311, limit ring 1; 320, disc; 321, limit ring 2; 330, cam; 340, inner gear ring; 350, transmission gear; 351, shaft; 352, center gear; 360, movable component; 361, slide rod; 362, fixed seat; 363, clamping rod; 400, threshing gap adjustment mechanism 2; 500, threshing component; 510, rotating member; 600, driving component; 610, ridge rod; 620, gear rod; 630, connecting rod; 640, ring kit; 641, inclined groove; 650, movable rod; 660, moving wheel; 670, linear motor; 671, clamping seat. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figure 1-8 As shown, a threshing gap electric adjustment device based on a cam gear includes a main shaft 100, a threshing gap adjustment mechanism 1 300 is fixedly connected to one end of the outer wall of the main shaft 100, a threshing gap adjustment mechanism 2 400 is fixedly connected to the other end of the outer wall of the main shaft 100, a feeding screw 200 is provided on one side of the threshing gap adjustment mechanism 1 300, a driving assembly 600 is provided at both ends of the main shaft 100, a plurality of threshing components 500 are connected between the threshing gap adjustment mechanism 1 300 and the threshing gap adjustment mechanism 2 400, and the plurality of threshing components 500 are circularly and equidistantly distributed on the threshing gap adjustment mechanism 1 300. On the periphery, the threshing gap adjusting mechanism 1 300 and the threshing gap adjusting mechanism 2 400 are used to drive the two ends of the threshing component 500 to move radially, and the driving assembly 600 is used to drive and adjust the threshing gap adjusting mechanism 1 300 and the threshing gap adjusting mechanism 2 400. The threshing gap adjusting mechanism 1 300 and the feeding screw 200 are both fixedly connected to the main shaft 100. The threshing gap adjusting mechanism 1 300 drives one end of the threshing component 500 to move, and the threshing gap adjusting mechanism 2 400 drives the other end of the threshing component 500 to move, thereby adjusting the gap size between the threshing component 500 and the screen.

[0031] The threshing gap adjustment mechanism 300 includes a disc housing 310, which is fixedly connected to the main shaft 100. A disc 320 is fixedly connected to one side of the disc housing 310, and the disc 320 is fixedly connected to the main shaft 100. The inner wall of the disc housing 310 is located on the outer side of the main shaft 100 and is fixedly connected to three shafts 351 at equal intervals in a ring shape. One end of the shaft 351 is rotatably connected to a transmission gear 350, and an inner gear ring 340 is provided on the outer side of the three transmission gears 350. The inner gear ring 340 is meshed with multiple transmission gears 350. A cam 330 is fixedly connected to the outer wall of the inner gear ring 340. The outer wall of the inner gear ring 340 is slidably connected to multiple movable components 360 in a ring shape at equal intervals. The movable components 360 are slidably engaged with the cam 330. The movable components 360 are rotatably connected to the adjacent threshing component 500. The cam 330 and the disc 320 are connected to the internal transmission The movable gear 350 is protected to prevent grain from entering the cam 330 and getting stuck in the inner gear ring 340 and the transmission gear 350. The movable assembly 360 includes a slide bar 361. The outer wall of the disc shell 310 is embedded in the fixed limit ring 311 corresponding to the positions of multiple threshing parts 500. The slide bar 361 is slidably sleeved with the inner wall of the limit ring 311 at the adjacent position. The top of the slide bar 361 is rotatably connected to one end of the adjacent threshing part 500. The bottom end of the slide bar 361 is fixedly connected to a fixed seat 362. Both ends of one side wall of the fixed seat 362 are rotatably connected to clamping rods 363, and the two clamping rods 363 are respectively located on both sides of the outer wall of the cam 330. The radial movement of the slide bar 361 is limited by the cam 330 to prevent the slide bar 361 from moving radially outward under the centrifugal force of the threshing part 500, so as to facilitate the control of the gap between the threshing part 500 and the screen.

[0032] The other end of the threshing component 500 is slidably sleeved with a rotating member 510. The structure of the threshing gap adjusting mechanism 2 400 is the same as that of the threshing gap adjusting mechanism 1 300. The rotating member 510 is rotatably connected to the top of the sliding rod 361 adjacent to the threshing gap adjusting mechanism 2 400, which is convenient for the threshing component 500 to maintain an inclined posture, so that the multiple threshing components 500 are conical, so that the threshing gap is larger at the front and smaller at the back, which adapts to the smaller size of the material in the threshing process, has a strong rubbing effect on the material, and improves the threshing quality. The inner wall of the disc shell 310 is fixedly connected to the limiting ring 1 311, and the side wall of the disc 320 is fixedly connected to the limiting ring 2 321. The limiting ring 1 One side of 311 and the limiting ring 2 321 are both in contact with the cam 330 to limit the cam 330 and prevent the cam 330 from sliding left and right. A cavity is provided at both ends of the main shaft 100. A center gear 352 is provided between the three transmission gears 350. The center gear 352 is rotatably connected to the main shaft 100. The center gear 352 is engaged with multiple transmission gears 350. The driving assembly 600 is used to drive the center gear 352 and the main shaft 100 to rotate relative to each other. When the center gear 352 and the main shaft 100 rotate relative to each other, the center gear 352 drives the cam 330 to rotate relative to the main shaft 100 through the transmission gear 350.

[0033] The driving assembly 600 includes a prism 610, which is slidably connected to the main shaft 100. The outer wall of the main shaft 100 is located at one end of the cavity and has two long grooves 120. One end of the prism 610 is detachably connected to a gear rod 620. Both ends of the gear rod 620 are detachably connected to a connecting rod 630. An annular kit 640 is fixed between one end of the two connecting rods 630. The gear rod 620 is slidably connected to the inner walls of the two long grooves 120. The annular kit 640 is movably connected to the main shaft 100. Both sides of the outer wall of the annular kit 640 are provided with There is an inclined groove 641, and movable rods 650 are fixed on both sides of the outer wall of one side of the center gear 352. One end of the movable rod 650 is slidingly connected to the inner wall of the adjacent inclined groove 641. When the ridge rod 610 moves axially, the ridge rod 610 drives the annular kit 640 to move outward through the gear rod 620 and the connecting rod 630. Since the center gear 352 is rotatably connected to the main shaft 100, the annular kit 640 moves outward through the inclined groove 641 and the movable rod 650, thereby causing the center gear 352 to rotate relative to the main shaft 100.

[0034] The driving assembly 600 also includes a linear motor 670. The other end of the ridge rod 610 is fixedly sleeved with a moving wheel 660. The output end of the linear motor 670 is fixedly connected with a clamping seat 671. The clamping seat 671 is slidingly connected to the moving wheel 660. The linear motor 670 does not participate in the rotation of the main shaft 100, so that the center of gravity of the main shaft 100, the feeding screw 200, the threshing gap adjustment mechanism 1 300, the threshing gap adjustment mechanism 2 400 and the multiple threshing components 500 are located on the axis of the main shaft 100, which is convenient for rotation and reduces the vibration generated during rotation. The outer wall of one end of the main shaft 100 is fixedly sleeved with a pulley 110, which is used for transmission connection with an external power device. The outer wall of the cam 330 is provided with multiple convex parts, and the multiple convex parts correspond one to one to the multiple slide bars 361. When the cam 330 rotates, the slide bars 361 are driven radially by the convex parts.

[0035] Working principle: When in use, the external power device drives the main shaft 100 to rotate through the pulley 110, and the main shaft 100 drives the feeding screw 200, the threshing gap adjustment mechanism 1 300, the threshing gap adjustment mechanism 2 400 and the multiple threshing components 500 to rotate, thereby threshing the crops. When it is necessary to adjust the gap between the multiple threshing components 500 and the screen, the output end of the linear motor 670 is controlled to retract, and the output end of the linear motor 670 drives the moving wheel 660 to move away from the feeding screw 200 through the clamping seat 671, so that the ridge rod 610 moves outward, and the ridge rod 610 drives the annular kit 640 to move outward through the gear rod 620 and the connecting rod 630. Since the central gear 352 is rotatably connected to the main shaft 100, the annular kit 640 moves outward through the inclined slot 641 and the movable rod 6 50 drives the central gear 352 to rotate, thereby making the central gear 352 and the main shaft 100 rotate relative to each other, and when the central gear 352 rotates, it drives the multiple transmission gears 350 to rotate in the opposite direction, thereby driving the cam 330 to rotate in the opposite direction, and the relative rotation of the cam 330 and the main shaft 100. When the cam 330 rotates relative to each other, the slide bar 361 is driven to move outward through the outer protrusion, thereby increasing the gap between one end of the threshing component 500 and the screen. Conversely, when the output end of the linear motor 670 extends outward, it drives the slide bar 361 to move into the disc housing 310, increasing the distance between one end of the threshing component 500 and the screen, thereby realizing the control and adjustment of the distance between the threshing component 500 and the screen as needed, and the threshing gap can be adjusted in real time during the threshing process according to the feeding amount to avoid material blockage;

[0036] By setting the threshing gap adjustment mechanism 2 400 and the shaft 351, the distance between the other end of the threshing component 500 and the screen is independently controlled by another driving assembly 600 and the threshing gap adjustment mechanism 2 400, so that the distances between the two ends of the threshing component 500 and the screen are different, so that the multiple threshing components 500 are set in a cone shape, so that the threshing gap is larger at the front and smaller at the back, which adapts to the smaller size of the material in the threshing process, has a strong rubbing effect on the material, and improves the threshing quality. In addition, the moving speed of the threshing component 500 is smaller at one end and larger at the other end, so that the inertial impact speed of the other end of the threshing component 500 on the material is higher, the threshing intensity is greater, the threshing ability is higher, and the threshing effect is good.

[0037] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A threshing gap electric adjustment device based on a cam gear, comprising a main shaft (100), characterized in that: One end of the outer wall of the main shaft (100) is fixedly connected to a threshing gap adjustment mechanism 1 (300), and the other end of the outer wall of the main shaft (100) is fixedly connected to a threshing gap adjustment mechanism 2 (400). A feeding screw (200) is provided on one side of the threshing gap adjustment mechanism 1 (300). Both ends of the main shaft (100) are provided with a driving assembly (600). A plurality of threshing components (500) are connected between the threshing gap adjustment mechanism 1 (300) and the threshing gap adjustment mechanism 2 (400), and A plurality of threshing components (500) are equidistantly distributed in a circular pattern around the periphery of the threshing gap adjustment mechanism (300), the threshing gap adjustment mechanism (300) and the threshing gap adjustment mechanism (400) are used to drive the two ends of the threshing component (500) to move radially, the driving assembly (600) is used to drive and adjust the threshing gap adjustment mechanism (300) and the threshing gap adjustment mechanism (400), and the threshing gap adjustment mechanism (300) and the feeding screw (200) are both fixedly connected to the main shaft (100); The threshing gap adjustment mechanism (300) includes a disc housing (310), the disc housing (310) is fixedly sleeved with the main shaft (100), a disc (320) is fixedly connected to one side of the disc housing (310), the disc (320) is fixedly sleeved with the main shaft (100), and the inner side wall of the disc housing (310) is located outside the main shaft (100) and is annularly and equidistantly fixed with three shafts (351), one end of which is rotatably connected to a transmission gear (350). , and an inner gear ring (340) is provided on the outer sides of the three transmission gears (350), the inner gear ring (340) is meshed with the plurality of transmission gears (350), the outer side wall of the inner gear ring (340) is fixedly connected with a cam (330), the outer side wall of the web housing (310) is annularly equidistantly slidably connected with a plurality of movable components (360), the movable components (360) are slidably engaged with the cam (330), and the movable components (360) are rotationally connected with the adjacent threshing component (500); The movable component (360) includes a slide rod (361), and the outer wall of the disc shell (310) is embedded with a fixed limit ring (311) corresponding to the positions of multiple threshing components (500). The slide rod (361) is slidably connected to the inner wall of the limit ring (311) at the adjacent position. The top end of the slide rod (361) is rotatably connected to one end of the adjacent threshing component (500). The bottom end of the slide rod (361) is fixedly connected to a fixed seat (362). Both ends of a side wall of the fixed seat (362) are rotatably connected to clamp rods (363), and the two clamp rods (363) are respectively located on both sides of the outer wall of the cam (330). The other end of the threshing component (500) is slidably sleeved with a rotating member (510), and the structure of the threshing gap adjustment mechanism 2 (400) is the same as that of the threshing gap adjustment mechanism 1 (300). The rotating member (510) is rotatably connected to the top end of the adjacent sliding rod (361) in the threshing gap adjustment mechanism 2 (400).

2. The threshing gap electric adjustment device based on the cam gear according to claim 1 is characterized in that: The inner wall of the disc housing (310) is fixedly connected to a first limiting ring (311), and a side wall of the disc (320) is fixedly connected to a second limiting ring (321). One side of each of the first limiting ring (311) and the second limiting ring (321) is in contact with the cam (330).

3. The threshing gap electric adjustment device based on the cam gear according to claim 1 is characterized in that: Both ends of the main shaft (100) are provided with cavities, a central gear (352) is provided between the three transmission gears (350), the central gear (352) is rotatably sleeved with the main shaft (100), the central gear (352) is meshed with the plurality of transmission gears (350), and the driving assembly (600) is used to drive the central gear (352) and the main shaft (100) to rotate relative to each other.

4. The threshing gap electric adjustment device based on the cam gear according to claim 3 is characterized in that: The driving assembly (600) includes a prism (610), the prism (610) is slidably connected to the main shaft (100), and the outer wall of the main shaft (100) is provided with two long grooves (120) at one end of the cavity. One end of the prism (610) is detachably connected to a shift rod (620), and both ends of the shift rod (620) are detachably connected to a connecting rod (630), and an annular kit (640) is fixed between one end of the two connecting rods (630). The shift rod (620) is slidably connected to the inner walls of the two long grooves (120), and the annular kit (640) is movably connected to the main shaft (100). Both sides of the outer wall of the annular kit (640) are provided with oblique grooves (641), and both sides of the outer wall of one side of the central gear (352) are fixedly connected to a movable rod (650), and one end of the movable rod (650) is slidably connected to the inner wall of the adjacent oblique groove (641).

5. The threshing gap electric adjustment device based on the cam gear according to claim 4 is characterized in that: The driving assembly (600) further comprises a linear motor (670); the other end of the prism (610) is fixedly sleeved with a moving wheel (660); the output end of the linear motor (670) is fixedly connected to a clamping seat (671); and the clamping seat (671) is slidably connected to the moving wheel (660).

6. The threshing gap electric adjustment device based on a cam gear according to claim 1 is characterized in that: A pulley (110) is fixedly sleeved on the outer side wall of one end of the main shaft (100), and the pulley (110) is used for transmission connection with an external power device.

7. The threshing gap electric adjustment device based on a cam gear according to claim 1 is characterized in that: The outer side wall of the cam (330) is provided with a plurality of external protrusions, and the plurality of external protrusions correspond one-to-one to the plurality of sliding rods (361).

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