Threshing cylinder gap adjusting device and harvester

Abstract

The utility model provides a threshing cylinder clearance adjusting device and harvester, including concave plate, adjusting mechanism and control mechanism, adjusting mechanism is used for adjusting concave plate clearance, including adjusting lever and rocker arm, rocker arm one end is connected concave plate, adjusting lever rotates to drive rocker arm to adjust concave plate clearance; the control mechanism is connected with the adjusting rod and comprises a driving part for driving the adjusting rod to rotate and a gap value obtaining system for obtaining a gap value, the driving part comprises a connecting arm and an adjusting piece for driving the connecting arm to rotate, and the gap value obtaining system is connected with the adjusting mechanism and obtains the gap value of the lower concave plate; wherein the sensor is used for detecting and acquiring a first gap value of a concave plate gap and converting the first gap value into a first voltage value, and the controller is used for monitoring and judging the first gap value corresponding to the first voltage value. According to the threshing cylinder gap adjusting device and the harvester, operation is easy, the gap value of the lower concave plate can be monitored in real time, and the harvesting efficiency is improved.

Description

Technical Field

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

[0002] During the process of harvesting grains, in order to achieve a satisfactory threshing effect when the grain harvester harvests different crops and at different maturity stages, it is necessary to adjust the threshing concave plate. When cleaning the harvested grains, the following problems are often encountered: Most of the concave plate adjusting devices are manually adjusted, that is, the operator needs to turn off the engine of the whole vehicle and manually adjust the gap of the lower concave plate at the concave plate gap adjustment position on the vehicle body; or the driver operates the manual pull rod in the cab to adjust the concave plate gap. Using these two methods is time-consuming and laborious, affecting the operation efficiency.

[0003] Currently, the concave plate adjusting devices of the mainstream models on the market are all manually adjusted after the machine stops, and the specific value of the concave plate gap cannot be directly known. Therefore, during the process of harvesting grains with different maturities, the cleaning operation effect is not good, the operation efficiency is low, and the degree of digitalization and intelligentization of agricultural harvesting is low. Therefore, it is necessary to provide a threshing cylinder gap adjusting device with simple operation and visible concave plate gap size to overcome the defects existing above. Content of the Utility Model

[0004] The purpose of the utility model is to provide a threshing cylinder gap adjusting device and a harvester, which solve the problems of difficult adjustment of the lower concave plate gap and inability to display the lower concave plate gap during the cleaning process of the harvester.

[0005] To solve the above technical problems, the present utility model provides a threshing cylinder gap adjusting device, including: a lower concave plate, an adjusting mechanism, and a control mechanism. One end of the lower concave plate is hinged to the threshing cylinder; the adjusting mechanism is connected to the lower concave plate for adjusting the gap of the lower concave plate; wherein, the adjusting mechanism includes: an adjusting rod and a rocker arm. The adjusting rod is arranged along the direction of the axis of the threshing cylinder and is rotatable; one end of the rocker arm is connected to the lower concave plate, and when the adjusting rod rotates, the rocker arm is driven to adjust the gap of the lower concave plate; the control mechanism is connected to the adjusting rod for controlling and adjusting the gap of the lower concave plate; wherein, the control mechanism includes: a driving part and a gap value acquisition system; the driving part is connected to the adjusting rod to drive the adjusting rod to rotate; the driving part includes a connecting arm and an adjusting part for driving the connecting arm to rotate. The connecting arm connects the adjusting part and the adjusting rod; the gap value acquisition system is connected to the adjusting mechanism for acquiring the gap value of the lower concave plate; the gap value acquisition system includes: a sensor for detecting the gap of the lower concave plate, acquiring the first gap value of the lower concave plate gap, and converting the first gap value into a first voltage value; a controller for monitoring the first voltage value and judging the first gap value corresponding to the first voltage value; the sensor is connected to the controller, and the controller obtains the output voltage of the sensor to further obtain the gap value of the lower concave plate.

[0006] By setting up the gap value acquisition system, the sensor detects the gap value of the lower concave plate, converts the gap value into a voltage value and outputs it to the controller. The controller judges the real-time gap value of the lower concave plate according to the magnitude of the voltage value transmitted by the sensor, and further controls and adjusts the size of the gap of the lower concave plate, forming a real-time transmission and real-time feedback mode.

[0007] In this embodiment, the adjusting part includes an adjusting screw rod, a slider is arranged on the adjusting screw rod, the slider is connected to the connecting arm, and the slider slides on the adjusting screw rod, thereby driving the connecting arm to drive the adjusting rod to rotate, realizing the adjustment of the gap of the lower concave plate.

[0008] Preferably, the control mechanism includes a fixed seat sleeved on the adjusting screw rod for installing a driving part; the driving part drives the adjusting screw rod to move in the fixed seat, thereby driving the slider to move. By installing the driving part, the manpower for adjusting the gap of the lower concave plate can be saved, the process of adjusting the gap of the lower concave plate is simple, the adjustment time is saved, and the harvesting efficiency can be improved.

[0009] In this embodiment, the connecting arm includes a first connecting arm and a second connecting arm; the first connecting arm is connected to the slider, and the second connecting arm is connected to the adjusting rod.

[0010] In this embodiment, the rocker arm includes a first rocker arm and a second rocker arm disposed at both ends of the concave plate; the first rocker arm includes a first connecting rod connected to the adjusting mechanism and a second connecting rod connected to the concave plate; the second rocker arm includes a third connecting rod connected to the adjusting rod and a fourth connecting rod connected to the concave plate, and the third connecting rod and the fourth connecting rod are connected by bolts.

[0011] In this embodiment, the driving member includes a first driving gear sleeved on the adjusting screw rod.

[0012] In this embodiment, the sensor is disposed on the frame, and the sensor includes a first connecting arm; the first connecting arm is connected to the first connecting rod, and a sliding seat is arranged on the first connecting rod, and the first connecting arm slides in the sliding seat.

[0013] Further, the clearance value acquisition system includes a display connected to the controller for displaying the first clearance value. By setting the display, during the harvesting process, the size of the concave plate clearance value can be understood in real time, which is convenient for adjusting the concave plate clearance according to different harvested crops, making the harvesting operation digital and intelligent.

[0014] Further, the sensor is an angle sensor, and the measurement range of the angle sensor is 0° - 90°.

[0015] The present utility model also provides a harvester including the threshing cylinder clearance adjusting device described in any one of the above.

[0016] By setting the clearance value acquisition system, the threshing cylinder clearance value, that is, the concave plate clearance value, is updated in real time, which is convenient for adjusting the concave plate clearance in a timely manner according to different crops during the harvesting operation, further improving the production efficiency. At the same time, the clearance value acquisition system is connected to the adjusting mechanism, which can save manpower for adjusting the concave plate clearance of the threshing cylinder, further saving the manpower input during the harvesting process and meeting the construction requirements of digitalization and intelligence during the crop harvesting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model in detail with reference to the drawings and specific embodiments:

[0018] Figure 1 It is a schematic diagram of a threshing cylinder clearance adjusting device provided by an embodiment of the present utility model.

[0019] Figure 2 It is a structural schematic of a threshing cylinder clearance adjusting device provided by an embodiment of the present utility model Figure 1 .

[0020] Figure 3Structural schematic of a threshing cylinder gap adjustment device provided by an embodiment of the present utility model Figure 2 。

[0021] Figure 4 Structural schematic of a threshing cylinder gap adjustment device provided by an embodiment of the present utility model Figure 3 。

[0022] Figure 5 Schematic diagram of a gap value acquisition system provided by an embodiment of the present utility model.

[0023] Figure 6 Adjustment schematic of a threshing cylinder gap adjustment device provided by an embodiment of the present utility model.

[0024] Explanation of reference numerals in the drawings:

[0025] 100 - Threshing cylinder gap adjustment device; 2 - Lower concave plate; 3 - Adjusting mechanism; 31 - Adjusting rod; 32 - Rocker arm; 321 - First rocker arm; 3211 - First connecting rod; 3212 - Second connecting rod; 322 - Second rocker arm; 3221 - Third connecting rod; 3222 - Fourth connecting rod; 3223 - Bolt; 4 - Control mechanism; 41 - Driving part; 411 - Connecting arm; 4111 - First connecting arm; 4112 - Second connecting arm; 412 - Adjusting part; 4121 - Adjusting lead screw; 4122 - Slide block; 413 - Driving part; 414 - First driving gear; 42 - Fixed seat; 50 - Gap value acquisition system; 51 - Sensor; 511 - First connecting arm; 512 - Sliding seat; 52 - Controller; 53 - Display. Specific embodiments

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown as one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0028] It should also be further understood that the term "and / or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] In this context, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] To more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will describe the specific embodiments of the present utility model with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings and other embodiments can be obtained.

[0032] See Figures 1 to 6 As shown, the embodiment of the present utility model provides a harvester. The harvester provided by this embodiment is equipped with a threshing cylinder gap adjustment device, which can adjust the gap of the concave plate 2 for grains of different maturities, and the cleaning effect is better. At the same time, the gap value of the concave plate 2 can be monitored in real time, and the gap size of the concave plate 2 can be adjusted according to the gap value. The operation is simple, convenient and intuitive, and digital crop harvesting is realized at the same time.

[0033] See Figures 1 to 6As shown in the figure, an embodiment of the utility model provides a threshing cylinder gap adjusting device, which includes a lower concave plate 2, an adjusting mechanism 3, and a control mechanism 4. One end of the lower concave plate 2 is hinged to the threshing cylinder to adjust the gap. The adjusting mechanism 3 is connected to the lower concave plate 2, and the adjusting mechanism 3 is connected to the other end of the lower concave plate 2. By adjusting the other end of the lower concave plate 2, the gap of the lower concave plate 2 is adjusted. Among them, the adjusting mechanism 3 includes an adjusting rod 31 and a rocker arm 32. The adjusting rod 31 is arranged along the transverse axis direction of the threshing cylinder. One end of the rocker arm 32 is connected to the lower concave plate 2. The adjusting rod 31 is rotatable, and the rotation of the adjusting rod 31 drives the rocker arm 32 to move, so as to adjust the gap of the lower concave plate 2. In order to make the gap specifications at both ends of the lower concave plate 2 and the threshing cylinder consistent during the adjustment of the lower concave plate 2, therefore, rocker arms 32 are respectively arranged at both ends of the adjusting rod 31 to adjust the gap of the lower concave plate 2, so as to adjust the uniformity of the gaps on both sides of the lower concave plate 2.

[0034] The control mechanism 4 is connected to the adjusting rod 31 and is used to control the adjustment of the gap of the lower concave plate 2. The control mechanism 4 includes a driving part 41 and a gap value acquisition system 50. The driving part 41 is connected to the adjusting rod 31 and drives the adjusting rod 31 to rotate. The driving part 41 includes a connecting arm 411 and an adjusting part 412 that drives the connecting arm 411 to rotate. The connecting arm 411 is connected to the adjusting part 412 and the adjusting rod 31; the gap value acquisition system 50 is connected to the adjusting mechanism 3 and is used to acquire the gap value of the lower concave plate 2.

[0035] The gap value acquisition system 50 includes a sensor 51 and a controller 52. The sensor 51 is used to detect the size of the gap of the lower concave plate 2, acquire the first gap value of the gap of the lower concave plate 2, and convert the first gap value into a first voltage value; the controller 52 is used to monitor the first voltage value and judge the first gap value corresponding to the first voltage value; the sensor 51 is connected to the controller 52, and the controller 52 obtains the output voltage of the sensor 51 and then obtains the gap value of the lower concave plate 2. Specifically, after the sensor 51 acquires the first gap value of the threshing cylinder gap, it converts the first gap value into a first voltage value and transmits it to the controller 52. The gap value corresponding to the preset voltage value is preset in the controller 52. To know the size of the first gap value, the first voltage value is compared with the preset voltage value. According to the comparison result, the voltage value is compared with the first voltage value, and the matched gap value is the first gap value. At this time, the first gap value is the gap of the lower concave plate 2. It should be noted that the controller 52 is arranged in the main driver's cab and is connected to the main engine in the cab. The controller 52 can be a valve controller, an ECU (Electronic Control Unit), and the controller 52 can include any type of one or more micro control units, including but not limited to micro control units, microcontrollers, DSP (Digital Signal Processor), or any combination thereof.

[0036] Further, the sensor 51 here is an angle sensor 51. The angle sensor 51 obtains the angle change during the process of adjusting the gap of the concave plate 2, calculates the specific voltage value, and the magnitude of the voltage value is positively correlated with the angle of the sensor 51. The angle obtained by the angle sensor 51 is positively correlated with the gap size of the concave plate 2, that is, the larger the gap of the concave plate 2, the larger the voltage value converted by the angle sensor 51. In this embodiment, during the operation of the angle sensor 51, the voltage converted by the angle sensor 51 according to the detected gap value of the lower concave plate is the output voltage, and this output voltage is transmitted to the controller 52, and the controller 52 further matches to obtain the gap value of the concave plate 2. For example, in this embodiment, the range of the gap value corresponding to the gap of the concave plate 2 is 10 mm - 45 mm, the sensing angle range corresponding to the angle sensor 51 is 0 - 90 degrees, and the range of the voltage value of the corresponding sensor 51 obtained by the controller 52 is 0.5 V - 3.5 V. When the gap of the concave plate 2 is 10 mm, the angle obtained by the angle sensor 51 is 0 degrees, and at this time, the voltage value obtained by the controller 52 is 0.5 V; when the maximum gap of the concave plate 2 is 45 mm, the corresponding angle obtained by the angle sensor 51 is 90 degrees, and at this time, the voltage value of the corresponding sensor 51 obtained by the controller 52 is 3.5 V.

[0037] Through this form of analog-to-digital conversion, when detecting the gap of the concave plate 2 and converting the gap of the concave plate 2 into an electrical signal and outputting it to the harvester equipped with this embodiment, digital and intelligent agricultural harvesting is further realized.

[0038] The adjusting member 412 includes an adjusting screw rod 4121. A slider 4122 is arranged on the adjusting screw rod 4121. The slider 4122 is connected to the connecting arm 411. During the adjustment of the adjusting screw rod 4121, the slider 4122 is driven to move, and then the connecting arm 411 is driven to drive the adjusting rod 31 to rotate, so as to realize the adjustment of the gap of the concave plate 2. To realize the adjustment of the gap of the concave plate 2 driven by the adjusting rod 31, first, the rotation of the adjusting rod 31 needs to be realized. To achieve this purpose of rotating the adjusting rod 31, an adjusting screw rod 4121 is set and a slider 4122 is arranged on the adjusting screw rod 4121. During the process of driving the adjusting screw rod 4121 to move, the slider 4122 moves along with the adjusting screw rod 4121. The connecting arm 411 connected to the slider 4122 and the adjusting rod 31 rotates following the change of the position of the slider 4122 during the movement of the adjusting screw rod 4121, and then drives the adjusting rod 31 to rotate, so as to realize the adjustment of the gap of the concave plate 2. This kind of transmission structure is simple and flexible.

[0039] The control mechanism 4 includes a fixed seat 42 sleeved on the adjusting lead screw 4121 for mounting the driving member 413. The driving member 413 drives the adjusting lead screw 4121 to move within the fixed seat 42, thereby driving the slider 4122 to move. Here, the driving member 413 can be a motor, a starter, a hydraulic cylinder, etc. The driving member 413 is mounted on the fixed seat 42 and connected to the adjusting lead screw 4121. The driving member 413 drives the adjusting lead screw 4121 to rotate, driving the slider 4122 to move. Using the form of driving the adjusting lead screw 4121 to rotate by the driving member 413 is convenient and simple, can significantly improve the rotation efficiency of the adjusting lead screw 4121, and is easy to control.

[0040] Preferably, referring to Figure 6 , in this embodiment, the driving is realized by a motor, that is, the driving member 413 is a motor. The driving member 413 includes a first driving gear 414 sleeved on the adjusting lead screw 4121. A driving gear is provided on the motor. During the driving process, the first driving gear 414 meshes with the driving gear, thereby driving the adjusting lead screw 4121 to rotate. By selecting a motor, the forward and reverse rotations of the adjusting lead screw 4121 are realized through the forward and reverse rotations of the motor, and then the forward and reverse rotations of the adjusting rod 31 are realized, so as to realize the increase and decrease of the gap of the lower concave plate 2. It should be noted that in various implementation manners, the modes of using equipment such as a starter and a hydraulic cylinder to provide power to drive the adjusting lead screw 4121 to rotate will not be described one by one here. Specifically, the motor here is a DC motor. To realize the adjustment of the gap size of the lower concave plate 2, by controlling the rotation direction of the motor, the rotation directions of the adjusting lead screw 4121 and the adjusting rod 31 are changed, so as to achieve the purpose of adjusting the gap of the lower concave plate 2. When the controller 52 controls the voltage flowing into the motor to be a positive voltage, the motor rotates forward, driving the gap of the lower concave plate 2 to become larger; when the controller 52 controls the voltage flowing into the motor to be a negative voltage, the motor rotates in reverse, driving the gap of the lower concave plate 2 to become smaller. It should be noted that when the motor receives a positive voltage, the motor rotates forward and the gap of the lower concave plate 2 becomes larger, or it can also be set that when the motor receives a positive voltage, the motor rotates forward and the gap between the lower concave plates 2 becomes smaller, and vice versa.

[0041] Specifically, in this embodiment, the connecting arm 411 includes a first connecting arm 4111 and a second connecting arm 4112; the first connecting arm 4111 is connected to the slider 4122, the second connecting arm 4112 is connected to the adjusting rod 31, and the first connecting arm 4111 is connected to the second connecting arm 4112. During the movement of the slider 4122 following the adjusting screw rod 4121, the first connecting arm 4111 rotates following the movement of the slider 4122. At this time, the second connecting arm 4112 follows the movement of the first connecting arm 4111 and further drives the adjusting rod 31 to rotate. Optionally, the first connecting arm 4111 and the second connecting arm 4112 can be connected by fasteners, or the first connecting arm 4111 and the second connecting arm 4112 can be integrally formed. If the first connecting arm 4111 and the second connecting arm 4112 are integrally formed, the production cost can be reduced and the transmission efficiency can be improved.

[0042] In the adjusting mechanism 3, the swing arms 32 for uniformly adjusting the gap of the lower concave plate 2 are arranged on both sides of the adjusting rod 31, and include a first swing arm 321 and a second swing arm 322. Both the first swing arm 321 and the second swing arm 322 are arranged below the lower concave plate 2. The first swing arm 321 includes a first connecting rod 3211 connected to the adjusting mechanism 3 and a second connecting rod 3212 connected to the lower concave plate 2; the second swing arm 322 includes a third connecting rod 3221 connected to the adjusting rod 31 and a fourth connecting rod 3222 connected to the lower concave plate 2, and the third connecting rod 3221 and the fourth connecting rod 3222 are connected by a bolt 3223.

[0043] In this embodiment, the sensor 51 is arranged on the frame, and the sensor 51 includes a first connecting arm 511; the first connecting arm 511 is connected to the first connecting rod 3211, and a sliding seat 512 is arranged on the first connecting rod 3211, and the first connecting arm 511 slides in the sliding seat 512. Specifically, the sliding seat 512 arranged on the first connecting rod 3211 is connected to the first connecting arm 511 of the angle sensor 51. During the adjustment of the gap of the lower concave plate 2, the first connecting rod 3211 changes following the change of the angle of the lower concave plate 2. At this time, the first connecting arm 511 rotates to generate an angle following the change of the position of the sliding seat 512 arranged on the first connecting rod 3211, and the angle sensor 51 converts this angle change into a voltage value and further transmits it to the controller 52 for processing.

[0044] Preferably, referring to Figure 5 , a display 53 is further arranged in this embodiment. The display 53 is connected to the controller 52 and is used to display the first gap value. Specifically, the display 53 is connected to the controller 52 through the CAN bus in the cab of the harvester to display the gap value of the lower concave plate 2 in real time. By arranging the display 53, during the harvesting operation, the driver can monitor the first gap value in real time in the cab, which is convenient for timely adjustment during the harvesting operation.

[0045] In summary, the present utility model obtains the gap value through the gap value acquisition system 50, and obtains and updates the gap value of the concave plate 2 in real time, which is convenient for harvesting operations. By connecting the controller 52 to the adjustment mechanism 3, it saves manpower for adjusting the gap of the concave plate 2, further improves production efficiency, and promotes the intelligent and digital harvesting of the harvester.

[0046] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present utility model without departing from the spirit and scope of the present utility model. Therefore, it is intended that the present utility model cover modifications and variations of the present utility model falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A threshing drum gap adjustment device, characterized in that: include: A lower concave plate, one end of which is hinged to the threshing drum; An adjusting mechanism, the adjusting mechanism is connected to the lower concave plate and is used to adjust the clearance between the lower concave plates; The regulating mechanism comprises: An adjusting rod, the adjusting rod is arranged along the direction of the axis of the threshing drum, and the adjusting rod is rotatable; A rocker arm, one end of which is connected to the lower concave plate, and the adjusting rod rotates to drive the rocker arm to adjust the clearance of the lower concave plate; A control mechanism, the control mechanism is connected to the adjustment rod and is used to control and adjust the clearance of the lower concave plate; The control mechanism comprises: A driving part, the driving part is connected to the adjusting rod and drives the adjusting rod to rotate; the driving part includes a connecting arm and an adjusting member driving the connecting arm to rotate, the connecting arm connects the adjusting member and the adjusting rod; A gap value acquisition system, the gap value acquisition system is connected to the adjustment mechanism and is used to acquire the gap value of the lower concave plate; The gap value acquisition system comprises: A sensor, used for detecting the gap between the lower concave plates, obtaining a first gap value between the lower concave plates, and converting the first gap value into a first voltage value; a controller, configured to monitor the first voltage value and determine a first gap value corresponding to the first voltage value; The sensor is connected to the controller, and the controller obtains the output voltage of the sensor and then obtains the clearance value of the lower concave plate.

2. A threshing drum gap adjustment device as claimed in claim 1, characterized in that: The adjusting member comprises an adjusting screw rod, a slider is arranged on the adjusting screw rod, the slider is connected to the connecting arm, the slider slides on the adjusting screw rod, and then drives the connecting arm to drive the adjusting rod to rotate, so as to adjust the clearance of the lower concave plate.

3. A threshing drum gap adjustment device as claimed in claim 2, characterized in that: The control mechanism comprises a fixing seat, which is sleeved on the adjusting screw rod and used for installing a driving member; the driving member drives the adjusting screw rod to move in the fixing seat, thereby driving the sliding block to move.

4. A threshing drum gap adjustment device as claimed in claim 3, characterized in that: The connecting arm includes a first connecting arm and a second connecting arm; the first connecting arm is connected to the slider, and the second connecting arm is connected to the adjusting rod.

5. A threshing drum gap adjustment device as claimed in claim 4, characterized in that: The rocker arm includes a first rocker arm and a second rocker arm arranged at both ends of the lower concave plate; the first rocker arm includes a first connecting rod connected to the adjusting mechanism and a second connecting rod connected to the lower concave plate; the second rocker arm includes a third connecting rod connected to the adjusting rod and a fourth connecting rod connected to the lower concave plate, and the third connecting rod and the fourth connecting rod are connected by bolts.

6. A threshing drum gap adjustment device as claimed in claim 5, characterized in that: The driving member comprises a first driving gear, and the first driving gear is sleeved on the adjusting screw rod.

7. A threshing drum gap adjustment device as claimed in claim 6, characterized in that: The sensor is arranged on the frame, and the sensor comprises a first connecting arm; the first connecting arm is connected to the first connecting rod, the first connecting rod is provided with a sliding seat, and the first connecting arm slides in the sliding seat.

8. A threshing drum gap adjustment device as claimed in claim 7, characterized in that: The gap value acquisition system includes a display, which is connected to the controller and is used to display the first gap value.

9. A threshing drum gap adjustment device as claimed in claim 8, characterized in that: The sensor is an angle sensor, and the angle sensor has a measurement range of 0°-90°.

10. A harvester, characterized in that: The invention comprises the threshing drum gap adjustment device as described in any one of claims 1 to 9.

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