Threshing gap adjustment device and harvester

Abstract

The utility model relates to the technical field of agricultural machinery, and discloses a threshing gap adjustment device and a harvester. The threshing gap adjustment device includes: a concave plate screen rotating arm shaft, which is rotatably arranged on the frame of the harvester; a first transmission mechanism, which is arranged between the concave plate screen rotating arm shaft and the concave plate screen, and drives the concave plate screen to approach or move away from the threshing drum; a driving mechanism, which is connected to the concave plate screen rotating arm shaft, and the driving mechanism drives the concave plate screen rotating arm shaft to rotate relative to the frame. The utility model drives the concave plate screen rotating arm shaft to rotate through the driving mechanism, and then drives the first transmission mechanism to drive the concave plate screen to approach or move away from the threshing drum, so as to adjust the size of the threshing gap, so that the harvester can adapt to different types of grains and harvesting conditions, and improve the threshing efficiency and grain quality. In addition, the utility model can realize the automatic adjustment of the threshing gap by using the driving mechanism and the first transmission mechanism, reduce the amount of manual participation, and improve the accuracy of the adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a threshing gap adjusting device and a harvester. Background Art

[0002] The threshing and separation device is one of the core working parts of the harvester, and its performance directly determines the harvesting effect and operating efficiency of the whole machine. In the relevant technology, the threshing and separation device is mainly composed of a concave plate screen and a threshing drum, and the coordinated work of the two is the key to achieving efficient threshing.

[0003] However, when harvesters are faced with grains of different types, yields, maturity and moisture content, there are significant differences in the physical state of the grains, so there are different requirements for the gap between the concave screen and the threshing drum (i.e., the "threshing gap"). If the threshing gap cannot be adjusted in time according to the characteristics of the grains, problems such as incomplete threshing or drum blockage may occur.

[0004] To solve the above problems, the adjustment of the threshing gap size in the related art usually requires manual adjustment by the user. However, this manual adjustment method is not only time-consuming and labor-intensive, but also may cause inaccurate adjustment due to human factors, affecting the harvesting effect. Utility Model Content

[0005] In view of this, the utility model provides a threshing gap adjustment device and a harvester to solve the problem that the threshing gap adjustment method in the related art is time-consuming and labor-intensive and has poor adjustment accuracy.

[0006] In a first aspect, the utility model provides a threshing gap adjustment device, wherein a threshing gap is formed between a threshing drum of a harvester and a concave plate screen of the harvester, comprising:

[0007] The concave plate screen rotating arm shaft is rotatably arranged on the frame of the harvester;

[0008] A first transmission mechanism is arranged between the concave plate screen rotating arm shaft and the concave plate screen, and is suitable for driving the concave plate screen to approach or move away from the threshing drum under the driving of the concave plate screen rotating arm shaft;

[0009] A driving mechanism is connected to the concave plate screen rotating arm shaft, and the driving mechanism is suitable for driving the concave plate screen rotating arm shaft to rotate relative to the frame.

[0010] Beneficial effects: The utility model drives the concave plate screen arm shaft to rotate through the driving mechanism, and then drives the first transmission mechanism to drive the concave plate screen to move closer to or away from the threshing drum, so as to realize stepless adjustment of the threshing gap size, so that the harvester can harvest different grains under different working conditions, thus not only improving the harvester's operating performance, threshing efficiency and grain quality, but also meeting the requirements of different users for harvesting quality. In addition, the utility model realizes automatic adjustment of the threshing gap size by using the driving mechanism and the first transmission mechanism, reduces the amount of manual participation, and improves the accuracy of adjustment.

[0011] In an optional embodiment, the first transmission mechanism includes a bushing, a connecting piece and a pair of ear plates, wherein the bushing is sleeved on the concave plate screen rotating arm shaft and has an interference fit with the concave plate screen rotating arm shaft; one end of the connecting piece is fixedly connected to the concave plate screen, and the other end is located between the pair of ear plates and hinged to the pair of ear plates; one end of a pair of ear plates away from the connecting piece is fixedly connected to the bushing.

[0012] Beneficial effects: The utility model provides an interference fit between the shaft sleeve and the concave plate screen arm shaft, which can prevent the shaft sleeve from being relatively displaced from the concave plate screen arm shaft during the rotation of the concave plate screen arm shaft, thereby ensuring the movement consistency of the shaft sleeve and the concave plate screen arm shaft. Furthermore, a pair of ear plates are fixedly connected to the shaft sleeve, which can, on the one hand, make the connection between the first transmission mechanism and the concave plate screen arm shaft more secure; on the other hand, it can reduce the force on a single ear plate and reduce the probability of damage to the first transmission mechanism. In addition, the ear plate is hinged to the connecting piece, so that the angle between the connecting piece and the ear plate can be changed within a certain range, that is, the threshing gap size can be flexibly adjusted, allowing the harvester to adapt to different needs under different operating conditions.

[0013] In an optional embodiment, a rotating portion is provided on one of the connecting member and the ear plate, and a mounting hole rotatably matched with the rotating portion is provided on the other one.

[0014] Beneficial effect: The utility model provides a rotating part and a mounting hole between the connecting plate and the ear plate, so that the connecting part and the ear plate can rotate freely within a certain range, thereby realizing flexible adjustment of the threshing gap size and allowing the harvester to adapt to different needs under different working conditions.

[0015] In an optional embodiment, there are multiple first transmission mechanisms, and the multiple first transmission mechanisms are arranged at intervals along the axial direction of the concave plate screen rotating arm shaft.

[0016] Beneficial effect: The utility model arranges a plurality of first transmission mechanisms at intervals between the concave plate screen rotating arm shaft and the concave plate screen, which not only allows the entire concave plate screen to move relative to the threshing drum, but also allows a part of the concave plate screen to move relative to the drum. In this way, the flexibility of adjusting the threshing gap is enhanced, and the adaptability and operating performance of the harvester to different grains are improved.

[0017] In an optional embodiment, one end of the concave plate screen rotating arm shaft extends out of the frame and is connected to the driving mechanism, and the driving mechanism is located on a side of the frame away from the concave plate screen.

[0018] Beneficial effects: The utility model arranges the driving mechanism on the side of the frame away from the concave plate screen, and is connected to the end of the concave plate screen rotating arm shaft extending out of the frame. On the one hand, it can provide sufficient installation space for the staff and improve the convenience of installing the driving mechanism; on the other hand, it can avoid interference between the driving mechanism and the structure on the harvester, such as the concave plate screen.

[0019] In an optional embodiment, the driving mechanism includes an electric motor arranged on the frame, and the electric motor is connected to the concave plate screen rotating arm shaft through a reducer; or the driving mechanism includes a reduction motor arranged on the frame, and the drive shaft of the reduction motor is connected to the concave plate screen rotating arm shaft.

[0020] Beneficial effect: Whether the combination of the electric motor and the reducer is set as the driving mechanism, or the reduction motor is set as the driving mechanism, both schemes can reduce the output speed of the driving mechanism to a preset specific speed, thereby ensuring the smoothness of power transmission between the driving mechanism and the concave plate screen arm shaft, that is, the concave plate screen arm shaft can continuously receive stable power input, thereby improving the accuracy of threshing gap adjustment.

[0021] In an optional embodiment, the threshing gap adjustment device also includes a second transmission mechanism, which includes a driving gear and a driven gear, wherein the driving gear is sleeved on the output shaft of the reducer, and the driven gear is sleeved on the concave plate screen rotating arm shaft and meshed with the driving gear; or the driving gear is sleeved on the drive shaft of the reduction motor, and the driven gear is sleeved on the concave plate screen rotating arm shaft and meshed with the driving gear.

[0022] Beneficial effects: The utility model sets the combination of the driving gear and the driven gear as the second transmission mechanism, which can improve the power transmission efficiency and reduce the loss in the power transmission process on the one hand; on the other hand, through the cooperation of the driving gear and the driven gear, it can provide a precise rotation speed for the concave plate screen arm shaft, that is, the first transmission mechanism can drive the concave plate screen to move at a constant speed, ensuring the accuracy and stability of the threshing gap adjustment.

[0023] In an optional implementation, the driven gear is a sector gear, and a weight-reducing through hole is provided on the driven gear.

[0024] Beneficial effects: The utility model sets the driven gear as a sector gear, which can not only reduce the manufacturing cost of the driven gear, but also reduce the installation space occupied by the driven gear on the harvester. In addition, by setting a weight-reducing through hole on the driven gear, on the one hand, the weight of the driven gear itself can be reduced, and on the other hand, the driving force required by the driven gear can be reduced.

[0025] In an optional embodiment, the threshing gap adjustment device further includes an adjustment panel and a controller electrically connected to the adjustment panel, and the controller is electrically connected to the driving mechanism.

[0026] Beneficial effect: The utility model electrically connects the controller with the adjustment panel and the driving mechanism, so that the user can adjust the threshing gap by operating the adjustment panel. Compared with manual adjustment, it reduces the time of stopping to adjust the threshing gap and improves the convenience of the adjustment operation.

[0027] In a second aspect, the utility model further provides a harvester, comprising:

[0028] frame;

[0029] A threshing drum, rotatably connected to the frame;

[0030] A concave plate screen is movably connected to the frame and forms a threshing gap with the threshing drum;

[0031] In the above-mentioned threshing gap adjusting device, the concave plate screen arm shaft is rotatably connected to the frame and the size of the threshing gap is adjusted through the first transmission mechanism.

[0032] Beneficial effect: The harvester of the utility model can realize stepless adjustment of the threshing gap by adopting the above-mentioned threshing gap adjustment device, reduce unnecessary downtime adjustment time, and improve the operation efficiency of the harvester. In addition, since the above-mentioned threshing gap adjustment device uses the driving mechanism and the first transmission mechanism to automatically adjust the threshing gap, it can reduce the amount of manual participation, improve the accuracy of adjustment, and make the threshing gap better adapted to the shedding needs of different crops, so as to achieve the best threshing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of a threshing gap adjustment device according to an embodiment of the utility model;

[0035] Figure 2 It is a structural schematic diagram of a threshing gap adjustment device from another perspective of an embodiment of the utility model;

[0036] Figure 3 It is a structural schematic diagram of a threshing gap adjustment device from another perspective of an embodiment of the utility model;

[0037] Figure 4 It is a structural schematic diagram of a threshing gap adjustment device from another perspective of an embodiment of the utility model;

[0038] Figure 5 This is a structural schematic diagram of a first transmission mechanism of an embodiment of the utility model;

[0039] Figure 6 A structural schematic diagram of a second transmission mechanism of an embodiment of the utility model from another perspective;

[0040] Figure 7 It is a structural schematic diagram of a second transmission mechanism of an embodiment of the utility model.

[0041] Description of reference numerals:

[0042] 1. Concave plate screen arm shaft; 2. First transmission mechanism; 201. Bushing; 202. Connector; 203. Ear plate; 3. Driving mechanism; 301. Motor; 302. Reducer; 4. Second transmission mechanism; 401. Driving gear; 402. Driven gear; 4021. Weight-reducing through hole; 5. Concave plate screen; 6. Frame; 7. Threshing drum. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] Aiming at the problem that the adjustment method of the threshing gap in the related art is time-consuming and labor-intensive and has poor adjustment accuracy, the utility model provides a threshing gap adjustment device and a harvester.

[0045] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.

[0046] According to an embodiment of the present utility model, on the one hand, as Figures 1 to 7 As shown, a threshing gap adjustment device is provided, wherein a threshing gap is formed between a threshing drum 7 of a harvester and a concave plate screen 5 of the harvester, and the device comprises: a concave plate screen rotating arm shaft 1, a first transmission mechanism 2 and a driving mechanism 3.

[0047] Specifically, the concave plate screen arm shaft 1 is rotatably arranged on the frame 6 of the harvester; the first transmission mechanism 2 is arranged between the concave plate screen arm shaft 1 and the concave plate screen 5, and is suitable for driving the lower concave plate screen 5 to move closer to or away from the threshing drum 7 at the concave plate screen arm shaft 1; the driving mechanism 3 is connected to the concave plate screen arm shaft 1, and the driving mechanism 3 is suitable for driving the concave plate screen arm shaft 1 to rotate relative to the frame 6.

[0048] The embodiment of the utility model drives the concave plate screen arm shaft 1 to rotate through the driving mechanism 3, and then drives the first transmission mechanism 2 to drive the concave plate screen 5 to approach or move away from the threshing drum 7, so as to realize stepless adjustment of the threshing gap size, so that the harvester can harvest different grains under different working conditions, so as to improve the operating performance of the harvester, improve the threshing efficiency and grain quality, and meet the requirements of different users for harvesting quality. In addition, the utility model realizes the automatic adjustment of the threshing gap size by using the driving mechanism 3 and the first transmission mechanism 2, reduces the amount of manual participation, and improves the accuracy of adjustment.

[0049] According to one embodiment of the utility model, Figure 5 and Figure 6As shown, the first transmission mechanism 2 includes a sleeve 201, a connector 202 and a pair of ear plates 203, the sleeve 201 is sleeved on the concave plate screen arm shaft 1 and has an interference fit with the concave plate screen arm shaft 1; one end of the connector 202 is fixedly connected to the concave plate screen 5, and the other end is located between a pair of ear plates 203 and is hinged to the pair of ear plates 203; one end of a pair of ear plates 203 away from the connector 202 is fixedly connected to the sleeve 201. In the embodiment of the utility model, the sleeve 201 is interference-fitted with the concave plate screen arm shaft 1, which can prevent the sleeve 201 from relative displacement with the concave plate screen arm shaft 1 during the rotation of the concave plate screen arm shaft 1, and ensure the movement consistency of the sleeve 201 and the concave plate screen arm shaft 1. Further, the pair of ear plates 203 are fixedly connected to the sleeve 201, which can make the connection between the first transmission mechanism 2 and the concave plate screen arm shaft 1 more firm on the one hand; on the other hand, it can reduce the force on a single ear plate 203 and reduce the probability of damage to the first transmission mechanism 2. In addition, by hingedly connecting the ear plate 203 to the connecting piece 202, the angle between the connecting piece 202 and the ear plate 203 can be changed within a certain range, that is, the size of the threshing gap can be flexibly adjusted, allowing the harvester to adapt to different requirements under different operating conditions.

[0050] According to an embodiment of the present invention, a rotating part is provided on one of the connecting member 202 and the ear plate 203, and a mounting hole that is rotatably matched with the rotating part is provided on the other. It can be understood that the embodiment of the present invention allows the connecting member 202 and the ear plate 203 to rotate freely within a certain range by providing the rotating part and the mounting hole between the connecting plate and the ear plate 203, thereby realizing flexible adjustment of the threshing gap size, allowing the harvester to adapt to different needs under different working conditions.

[0051] According to one embodiment of the utility model, Figure 6 As shown, there are multiple first transmission mechanisms 2, and multiple first transmission mechanisms 2 are arranged at intervals along the axial direction of the concave plate screen arm shaft 1. In the embodiment of the utility model, multiple first transmission mechanisms 2 are arranged at intervals between the concave plate screen arm shaft 1 and the concave plate screen 5, which can not only allow the entire concave plate screen 5 to move relative to the threshing drum 7, but also allow a partial area on the concave plate screen 5 to move relative to the drum. In this way, the flexibility of threshing gap adjustment is enhanced, and the adaptability and operating performance of the harvester to different grains are improved.

[0052] It should be noted that, since the ear plate 203 in the first transmission mechanism 2 can be arranged on the concave plate screen arm shaft 1 through the shaft sleeve 201, the position of the first transmission mechanism 2 between the concave plate screen arm shaft 1 and the concave plate screen 5 can be flexibly adjusted as needed. The following is an explanation in combination with some examples:

[0053] In one example, there are two first transmission mechanisms 2. Specifically, the two first transmission mechanisms 2 are respectively arranged at the end positions close to the concave plate screen rotating arm shaft 1. In this way, when the concave plate screen rotating arm shaft 1 rotates, the two first transmission mechanisms 2 can drive the entire concave plate screen 5 to approach or move away from the threshing drum 7, and the entire threshing gap will become smaller or larger.

[0054] In another example, there are two first transmission mechanisms 2. Specifically, the two first transmission mechanisms 2 are both arranged near one end of the concave plate screen arm shaft 1. In this way, when the concave plate screen arm shaft 1 rotates, the first transmission mechanism 2 will only drive a part of the concave plate screen 5 to move, that is, it will only change the gap size between the area and the threshing drum 7.

[0055] According to an embodiment of the utility model, one end of the concave plate screen arm shaft 1 extends out of the frame 6 and is connected to the drive mechanism 3, and the drive mechanism 3 is located on the side of the frame 6 away from the concave plate screen 5. It can be understood that the embodiment of the utility model arranges the drive mechanism 3 on the side of the frame 6 away from the concave plate screen 5 and is connected to the end of the concave plate screen arm shaft 1 extending out of the frame 6, which can provide sufficient installation space for the staff on the one hand and improve the convenience of installing the drive mechanism 3; on the other hand, it can avoid interference between the drive mechanism 3 and the structure on the harvester, such as the concave plate screen 5.

[0056] According to one embodiment of the utility model, Figures 1 to 4 As shown, the driving mechanism 3 includes a motor 301 arranged on the frame 6, and the motor 301 is connected to the concave plate screen arm shaft 1 through a reducer 302; or the driving mechanism 3 includes a reduction motor arranged on the frame 6, and the drive shaft of the reduction motor is connected to the concave plate screen arm shaft 1. It can be understood that whether the combination of the motor 301 and the reducer 302 is set as the driving mechanism 3, or the reduction motor is set as the driving mechanism 3, both schemes can reduce the output speed of the driving mechanism 3 to a preset specific speed, thereby ensuring the stability of power transmission between the driving mechanism 3 and the concave plate screen arm shaft 1, that is, the concave plate screen arm shaft 1 can continuously receive stable power input, thereby improving the accuracy of threshing gap adjustment.

[0057] It should be noted that, in order to improve space utilization and reduce the space occupied in the width direction of the harvester, the motor 301 or the reduction motor can be arranged along the height direction of the harvester. In addition, the utility model does not limit the fixing method of the motor 301, the reducer 302 and the reduction motor on the frame 6, as long as the motor 301, the reducer 302 and the reduction motor can be firmly installed on the frame 6. Exemplarily, the reduction motor is arranged on the frame 6 through a mounting seat and a fastener. In this way, the convenience of subsequent maintenance and replacement can be improved.

[0058] It should be noted that, in order to ensure that the power can be smoothly transmitted between the driving mechanism 3 and the concave plate screen arm shaft 1, in a specific embodiment, the reduction ratio of the motor 301 and the reducer 302 is (40-50): (1-1.5). It can be understood that the reduction ratio of the motor 301 and the reducer 302 in this embodiment can be 40:1, 42:1, 43:1, 44:1, 45:1, 46:1, 47:1, 48:1, 49:1, 50:1, 40:1.5, 42:1.5, 43:1.5, 44:1.5, 45:1.5, 46:1.5, 47:1.5, 48:1.5, 49:1.5 or 50:1.5. The reduction ratio of the motor 301 and the reducer 302 can also be selected in the range of (40-50): (1-1.5).

[0059] According to one embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the threshing gap adjustment device also includes a second transmission mechanism 4, which includes a driving gear 401 and a driven gear 402. The driving gear 401 is sleeved on the output shaft of the reducer 302, and the driven gear 402 is sleeved on the concave plate screen arm shaft 1 and meshed with the driving gear 401; or the driving gear 401 is sleeved on the drive shaft of the reduction motor, and the driven gear 402 is sleeved on the concave plate screen arm shaft 1 and meshed with the driving gear 401. In the embodiment of the utility model, the combination of the driving gear 401 and the driven gear 402 is set as the second transmission mechanism 4, which can improve the power transmission efficiency and reduce the loss in the power transmission process on the one hand; on the other hand, through the cooperation of the driving gear 401 and the driven gear 402, the concave plate screen arm shaft 1 can be provided with an accurate rotation speed, that is, the first transmission mechanism 2 can drive the concave plate screen 5 to move at a constant speed, ensuring the accuracy and stability of the threshing gap adjustment.

[0060] It should be noted that in order to ensure that the force can be smoothly transmitted to the concave plate screen arm shaft 1 through the second transmission mechanism 4, the number of teeth of the driven gear 402 can be greater than the number of teeth of the driving gear 401. In a specific embodiment, the reduction ratio of the driving gear 401 to the driven gear 402 is (50-55): (5-10). Setting the reduction ratio of the driving gear 401 to the driven gear 402 within the above range can, on the one hand, reduce the output speed of the motor 301 or the reduction motor to ensure the stability of the force transmission; on the other hand, it can also increase the rotational torque applied to the concave plate screen arm shaft 1, so that the concave plate screen arm shaft 1 can drive the first transmission mechanism 2 to drive the concave plate screen 5 to move.

[0061] It is understandable that the reduction ratio of the motor 301 and the reducer 302 in this embodiment can be 50:5, 51:5, 52:5, 53:5, 54:5, 55:5, 50:6, 51:6, 52:6, 53:6, 54:6, 55:6, 50:7, 51:7, 52:8, 53:9, 54:10 or 55:10. The reduction ratio of the driving gear 401 and the driven gear 402 can also be selected in the range of (50-55): (5-10).

[0062] According to one embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the driven gear 402 is a sector gear, and a weight-reducing through hole 4021 is provided on the driven gear 402. In the embodiment of the utility model, the driven gear 402 is set as a sector gear, which can not only reduce the manufacturing cost of the driven gear 402, but also reduce the installation space occupied by the driven gear 402 on the harvester. In addition, by providing the weight-reducing through hole 4021 on the driven gear 402, on the one hand, the weight of the driven gear 402 itself can be reduced, and on the other hand, the driving force required by the driven gear 402 can be reduced.

[0063] According to an embodiment of the utility model, the threshing gap adjustment device further includes an adjustment panel and a controller electrically connected to the adjustment panel, and the controller is electrically connected to the driving mechanism 3. In the embodiment of the utility model, the controller is electrically connected to the adjustment panel and the driving mechanism 3, so that the user can adjust the threshing gap by operating the adjustment panel. Compared with manual adjustment, the time of stopping the machine to adjust the threshing gap is reduced, and the convenience of the adjustment operation is improved.

[0064] According to an embodiment of the utility model, the adjustment panel includes a touch screen, or the adjustment panel includes a display screen and a physical button electrically connected to the display screen. It is understandable that if the adjustment panel includes a touch screen, the user can directly control the drive mechanism 3 to adjust the size of the threshing gap by touching the screen, providing the user with a rich interactive experience. In addition, if the adjustment panel includes a display screen and a physical button electrically connected to the display screen, on the one hand, the user can understand the adjustment of the threshing gap, the working status of the drive mechanism 3 and other information in real time through the display screen; on the other hand, compared with touch buttons, by using physical buttons, the structure of the adjustment panel can be made more reliable and the service life of the adjustment panel can be extended.

[0065] It should be noted that the electrical connection in this embodiment can be connected through a CAN signal line.

[0066] According to an embodiment of the utility model, on the other hand, a harvester is provided, comprising: a frame 6, a threshing drum 7, a concave plate screen 5 and the above-mentioned threshing gap adjustment device. Specifically, the threshing drum 7 is rotatably connected to the frame 6; the concave plate screen 5 is movably connected to the frame 6 and forms a threshing gap between the threshing drum 7; the concave plate screen rotating arm shaft 1 is rotatably connected to the frame 6 and adjusts the size of the threshing gap through the first transmission mechanism 2.

[0067] The harvester of the embodiment of the utility model can realize stepless adjustment of the threshing gap by adopting the above-mentioned threshing gap adjustment device, reduce unnecessary downtime adjustment time, and improve the operation efficiency of the harvester. In addition, since the above-mentioned threshing gap adjustment device uses the driving mechanism 3 and the first transmission mechanism 2 to automatically adjust the threshing gap, it can reduce the amount of manual participation, improve the accuracy of adjustment, and make the threshing gap better adapted to the shedding needs of different crops, so as to achieve the best threshing effect.

[0068] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A threshing gap adjustment device, wherein a threshing gap is formed between a threshing drum (7) of a harvester and a concave screen (5) of the harvester, characterized in that: include: A concave plate screen rotating arm shaft (1) is rotatably arranged on a frame (6) of the harvester; A first transmission mechanism (2) is arranged between the concave plate screen rotating arm shaft (1) and the concave plate screen (5), and is suitable for driving the concave plate screen (5) to move closer to or away from the threshing drum (7) under the drive of the concave plate screen rotating arm shaft (1); A driving mechanism (3) is connected to the concave plate screen rotating arm shaft (1), and the driving mechanism (3) is suitable for driving the concave plate screen rotating arm shaft (1) to rotate relative to the frame (6).

2. The threshing gap adjustment device according to claim 1, characterized in that: The first transmission mechanism (2) comprises a shaft sleeve (201), a connecting piece (202) and a pair of ear plates (203); the shaft sleeve (201) is sleeved on the concave plate screen rotating arm shaft (1) and is interference fit with the concave plate screen rotating arm shaft (1); one end of the connecting piece (202) is fixedly connected to the concave plate screen (5), and the other end is located between the pair of ear plates (203) and is hinged to the pair of ear plates (203); one end of the pair of ear plates (203) away from the connecting piece (202) is fixedly connected to the shaft sleeve (201).

3. The threshing gap adjustment device according to claim 2, characterized in that: One of the connecting piece (202) and the ear plate (203) is provided with a rotating portion, and the other is provided with a mounting hole that is rotatably matched with the rotating portion.

4. The threshing gap adjusting device according to any one of claims 1 to 3, characterized in that: The number of the first transmission mechanisms (2) is multiple, and the multiple first transmission mechanisms (2) are arranged at intervals along the axial direction of the concave plate screen rotating arm shaft (1).

5. The threshing gap adjusting device according to any one of claims 1 to 3, characterized in that: One end of the concave plate screen rotating arm shaft (1) extends out of the frame (6) and is connected to the driving mechanism (3); the driving mechanism (3) is located on a side of the frame (6) facing away from the concave plate screen (5).

6. The threshing gap adjusting device according to any one of claims 1 to 3, characterized in that: The driving mechanism (3) comprises an electric motor (301) arranged on the frame (6), and the electric motor (301) is connected to the concave plate screen rotating arm shaft (1) via a reducer (302); or the driving mechanism (3) comprises a reduction motor arranged on the frame (6), and a drive shaft of the reduction motor is connected to the concave plate screen rotating arm shaft (1).

7. The threshing gap adjustment device according to claim 6, characterized in that: The invention also comprises a second transmission mechanism (4), the second transmission mechanism (4) comprising a driving gear (401) and a driven gear (402), the driving gear (401) being sleeved on the output shaft of the reducer (302), the driven gear (402) being sleeved on the concave plate screen rotating arm shaft (1) and meshing with the driving gear (401); or the driving gear (401) being sleeved on the output shaft of the reduction motor, the driven gear (402) being sleeved on the concave plate screen rotating arm shaft (1) and meshing with the driving gear (401).

8. The threshing gap adjustment device according to claim 7, characterized in that: The driven gear (402) is a sector gear, and a weight-reducing through hole (4021) is provided on the driven gear (402).

9. The threshing gap adjusting device according to any one of claims 1 to 3, characterized in that: It also includes an adjustment panel and a controller electrically connected to the adjustment panel, and the controller is electrically connected to the driving mechanism (3).

10. A harvester, characterized in that: include: Rack (6); A threshing drum (7) is rotatably connected to the frame (6); A concave plate screen (5) is movably connected to the frame (6) and forms a threshing gap with the threshing drum (7); The threshing gap adjustment device according to any one of claims 1 to 9, wherein the concave plate screen arm shaft (1) is rotatably connected to the frame (6) and the size of the threshing gap is adjusted through a first transmission mechanism (2).

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