Rotating speed adjusting device for harvesting machine and harvesting machine

Abstract

The invention discloses a rotating speed adjusting device for a harvesting machine and the harvesting machine, the rotating speed adjusting device comprises a driving wheel train mechanism, a driven wheel train mechanism, a first conveying belt, an electric telescopic driving part and a controller, and a first annular groove with adjustable width is formed in the driving wheel train mechanism; a second annular groove is formed in the driven wheel train mechanism and is in transmission connection with a rotary connecting shaft of the harvesting machine; the two ends of the conveying belt are clamped in the first annular groove and the second annular groove, and the first conveying belt can be driven by the driving wheel train mechanism to rotate; the electric telescopic driving part is in driving connection with the driving wheel train mechanism; the controller is configured to determine that a rotation speed adjustment signal is received; and the electric telescopic driving part is controlled to execute telescopic operation according to the rotating speed adjusting signal, so that the rotating speed of the rotating connecting shaft is adjusted by adjusting the width of the first annular groove. The rotating speed adjusting device is simple in structure, the rotating speed of the cleaning fan can be conveniently adjusted without stopping the harvesting machine, and the cost is low.

Description

Technical Field

[0001] This application belongs to the field of harvesting machinery technology, specifically relating to a speed adjustment device for harvesting machinery and harvesting machinery. Background Technology

[0002] The cleaning blower in harvesting machinery is a key component that separates and cleans grains from stems, debris, and other contaminants by generating a cleaning airflow. When harvesting crops with different moisture contents or varieties, the speed of the cleaning blower needs to be adjusted to ensure cleaning effectiveness and minimize cleaning losses during harvesting. Most existing cleaning blower speed adjustment devices are mechanical or hydraulic. Mechanical adjustment devices cannot adjust the speed during operation; the rotation mechanism must be manually changed when the machine is stopped. Hydraulic adjustment devices require pumps, motors, and oil pipes, resulting in higher costs. Summary of the Invention

[0003] The purpose of this application is to provide a speed adjustment device for harvesting machinery and harvesting machinery. The speed adjustment device for harvesting machinery has a simple structure, can conveniently adjust the speed of the cleaning blower without stopping the harvesting machinery, and has a low cost.

[0004] To achieve the above objectives, a first aspect of this application provides a speed adjustment device for harvesting machinery, the speed adjustment device comprising: The driving gear train mechanism has a first annular groove with an adjustable width. A passive gear train mechanism, on which a second annular groove is formed and is connected to the rotating connecting shaft of the harvesting machinery via a transmission; The first conveyor belt has one end fitted onto the driving gear train mechanism and clamped in the first annular groove, and the other end fitted onto the driven gear train mechanism and clamped in the second annular groove. The first conveyor belt can rotate under the drive of the driving gear train mechanism. The electric telescopic drive component is connected to the active wheel system mechanism for driving. The controller, which is communicatively connected to the electric telescopic drive, is configured to: Confirmation that the speed adjustment signal has been received; The electric telescopic drive is controlled to perform telescopic operations based on the speed adjustment signal, so as to adjust... The width of the first annular groove is used to adjust the rotational speed of the rotating connecting shaft.

[0005] In embodiments of this application, the speed adjustment device further includes a first operating device and a speed detector, both communicatively connected to the controller. The first operating device is used to input the target speed, and the speed detector is used to detect the current speed of the rotating connecting shaft. The speed adjustment signal is the target speed sent by the first operating device. Controlling the electric telescopic drive to perform telescopic operation according to the speed adjustment signal includes: The speed detector controls the current speed of the rotating connecting shaft; Calculate the speed adjustment amount of the rotating connecting shaft based on the current speed and the target speed; The electric telescopic drive is controlled to perform telescopic operations based on the speed adjustment.

[0006] In the embodiments of this application, controlling the electric telescopic drive to perform telescopic operation according to the rotational speed adjustment includes: Obtain the first correspondence between the rotational speed adjustment amount and the target width of the first annular groove; The target width is determined based on the first correspondence and the speed adjustment amount; Obtain a second correspondence between the target width and the target extension length of the electric telescopic drive component; Determine the target extension length based on the target width and the second correspondence; The electric telescopic drive is controlled to perform the telescopic operation based on the target extension length.

[0007] In embodiments of this application, the speed adjustment device further includes a second operating device and a speed detector for detecting the current speed of the rotating connecting shaft. The second operating device is equipped with an operating button. Both the operating button and the speed detector are communicatively connected to the controller. The speed adjustment signal is a signal sent by the operating button indicating that the operating button is in a pressed state. Controlling the electric telescopic drive to perform telescopic operation according to the speed adjustment signal includes: Get the cumulative duration of a single press of an operation button; The cumulative duration of a single instance is determined to be greater than the first preset duration and less than the second preset duration; Confirm that the speed adjustment device is in jog speed regulation mode; Get the preset step size value; The speed detector controls the current speed of the rotating connecting shaft; Calculate the target rotational speed of the rotating connecting shaft based on the current rotational speed and the preset step size value; The electric telescopic drive is controlled to perform the telescopic operation based on the target rotation speed.

[0008] In the embodiments of this application, controlling the electric telescopic drive to perform the telescopic operation according to the target rotational speed includes: Calculate the speed adjustment amount of the rotating connecting shaft based on the current speed and the target speed; Obtain the first correspondence between the rotational speed adjustment amount and the target width of the first annular groove; The target width is determined based on the first correspondence and the speed adjustment amount; Obtain a second correspondence between the target width and the target extension length of the electric telescopic drive component; Determine the target extension length based on the target width and the second correspondence; The electric telescopic drive is controlled to perform the telescopic operation based on the target extension length.

[0009] In embodiments of this application, controlling the electric telescopic drive to perform telescopic operations based on the rotation speed adjustment signal further includes: If the cumulative duration of a single operation is determined to be greater than the second preset duration, the speed adjustment device is determined to be in long-press speed adjustment mode. The telescopic operation time of the electric telescopic drive component is determined based on the cumulative duration of a single operation. The electric telescopic drive is controlled to perform the telescopic operation based on the duration of the telescopic operation.

[0010] In embodiments of this application, the active gear train mechanism includes: First connecting shaft; The first fixed plate has an axial protrusion and a fixed plate portion. The axial protrusion is rotatably sleeved on the first connecting shaft, and the fixed plate portion is located on the outer periphery of the axial protrusion and connected to the axial protrusion. The first moving plate is movably sleeved on the axial protrusion and connected to the telescopic end of the electric telescopic drive component. The first moving plate and the fixed plate together form the first annular groove.

[0011] In embodiments of this application, the passive gear train mechanism includes: The second connecting shaft is rotatably disposed on one side of the first connecting shaft; The second fixing plate is fitted onto the second connecting shaft and connected to the second connecting shaft; The second moving plate is sleeved on the second connecting shaft and together with the second fixed plate forms the second annular groove; The conveyor belt pulley is sleeved on and connected to the second connecting shaft, and the conveyor belt pulley is connected to the rotating connecting shaft for transmission.

[0012] In the embodiments of this application, the second moving disc is movably sleeved on the second connecting shaft, and the passive gear train mechanism further includes an elastic pressing member sleeved on the second connecting shaft and whose two ends respectively abut against the second moving disc and the conveyor belt pulley.

[0013] A second aspect of this application provides a harvesting machine that includes the aforementioned speed adjustment device for harvesting machines.

[0014] As can be seen from the above technical solution, the speed adjustment device includes an active gear train mechanism, a passive gear train mechanism, a first conveyor belt, an electric telescopic drive component, and a controller. The active gear train mechanism has a first annular groove with an adjustable width; the passive gear train mechanism has a second annular groove and is drive-connected to the rotating shaft of the harvesting machinery; one end of the conveyor belt is fitted onto the active gear train mechanism and clamped in the first annular groove, and the other end of the conveyor belt is fitted onto the passive gear train mechanism and clamped in the second annular groove. The first conveyor belt can rotate under the drive of the active gear train mechanism; the electric telescopic drive component is drive-connected to the active gear train mechanism; the controller is communicatively connected to the electric telescopic drive component and configured to: determine if a speed adjustment signal has been received; and control the electric telescopic drive component to perform a telescopic operation based on the speed adjustment signal, so as to adjust the speed of the rotating shaft by adjusting the width of the first annular groove. This speed adjustment device has a simple structure. It is equipped with an electric telescopic drive component that is connected to the active wheel system and adjusts the width of the first annular groove. After the controller receives the speed adjustment signal, it controls the electric telescopic drive component to perform a telescopic operation. By adjusting the width of the first annular groove, the speed of the rotating connecting shaft can be adjusted. This allows the harvesting machinery to automatically and steplessly adjust the speed of the rotating connecting shaft without stopping the machine. It also has the advantages of high adjustment accuracy, rapid response, and low cost.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the active gear train mechanism in an embodiment of this application; Figure 2 This is a schematic diagram of the driven gear train mechanism in the embodiments of this application.

[0017] Explanation of reference numerals in the attached figures 1-Active gear train mechanism; 101-First annular groove; 102-First connecting shaft; 103-First fixed plate; 1031-Axial protrusion; 1032-Fixed plate portion; 104-First moving plate; 105-First bearing; 106-Protective sleeve; 2-Passive gear train mechanism; 201-Second annular groove; 202-Second connecting shaft; 203-Second fixed plate; 204-Second moving plate; 2041-First limiting groove; 205-Transmitter pulley; 2051-Second limiting groove; 206-Elastic pressing member; 3-Electric telescopic drive member. Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0019] Embodiments of this application provide a speed adjustment device for harvesting machinery, such as... Figures 1-2 As shown, the speed adjustment device includes: The active gear train mechanism 1 has a first annular groove 101 with an adjustable width. The passive gear train 2 has a second annular groove 201 formed on it and is connected to the rotating connecting shaft of the harvesting machinery for transmission. The first conveyor belt has one end fitted onto the active gear train mechanism 1 and clamped in the first annular groove 101, and the other end fitted onto the passive gear train mechanism 2 and clamped in the second annular groove 201. The first conveyor belt can rotate under the drive of the active gear train mechanism 1. The electric telescopic drive component 3 is driven and connected to the active wheel system mechanism 1; The controller, which is communicatively connected to the electric telescopic drive 3, is configured to perform the following steps: Step S101: Confirm that a speed adjustment signal has been received; Step S102: Control the electric telescopic drive component 3 to perform telescopic operation according to the speed adjustment signal. The rotational speed of the rotating connecting shaft can be adjusted by adjusting the width of the first annular groove 101.

[0020] Specifically, the harvesting equipment includes a rotary actuator, which includes a rotary actuator body and a rotary connecting shaft. In this embodiment, the harvesting equipment can be a cleaning fan, which includes a cleaning fan body (i.e., the rotary actuator body) and a rotary connecting shaft mounted on the cleaning fan body. The cleaning fan body can rotate with the rotation of the rotary connecting shaft and perform cleaning functions (e.g., separating grains from stems, impurities, etc.). The first conveyor belt is a V-belt, and the electric telescopic drive 3 can be an electric push rod. In this embodiment, the controller and the active wheel system 1 are communicatively connected.

[0021] The controller can control the active wheel train mechanism 1 to drive the first conveyor belt to rotate. The first conveyor belt then transmits power to the passive wheel train mechanism 2 and the rotating connecting shaft of the harvesting machinery in sequence to drive the rotation of the harvesting machinery, thereby enabling the harvesting machinery to perform corresponding harvesting functions (such as the cleaning blower performing the cleaning function). The speed adjustment device in this embodiment also includes an operating device (such as a touch screen or armrest box) connected to the control communication. If it is necessary to adjust the speed of the rotating connecting shaft, the operator can perform a speed adjustment operation on the operating device, and the operating device will then send a corresponding speed adjustment signal to the controller (in this embodiment, the speed adjustment signal can be the target speed set by the operator through the touch screen, or it can be the cumulative duration of a single press of a button on the armrest box). After receiving the speed adjustment signal, the controller controls the electric telescopic drive 3 to extend or retract according to the speed adjustment signal to adjust the width of the first annular groove 101, thereby realizing the speed adjustment of the rotating connecting shaft.

[0022] For example, if the rotational speed of the rotating connecting shaft of the harvesting machinery needs to be increased based on the speed adjustment signal, the controller controls the electric telescopic drive 3 to perform a retraction function, thereby reducing the width of the first annular groove 101. The groove walls on both sides of the first annular groove 101 "squeeze" the first conveyor belt outward. Since the circumference of the first conveyor belt is fixed, it can only be forced to move away from the bottom wall of the first annular groove 101. The contact point (i.e., the effective transmission diameter) between the first conveyor belt and the groove walls on both sides of the first annular groove 101 will increase. According to the transmission ratio formula, if the driven wheel diameter (D) 从动 The diameter of the component forming the second annular groove 201 on the passive gear train mechanism 2 remains unchanged, while the diameter of the driving gear (D) remains unchanged. 主动 If the diameter of the component forming the first annular groove 101 on the active gear train mechanism 1 increases, the transmission ratio will decrease. If the input speed of the active gear train mechanism 1 remains unchanged, the output speed of the passive gear train mechanism 2 will increase. The output speed of the passive gear train mechanism 2 is positively correlated with the speed of the rotating connecting shaft, thus increasing the speed of the rotating connecting shaft. Conversely, if the rotational speed of the harvesting machinery's rotating connecting shaft needs to be reduced based on the speed adjustment signal, the controller controls the electric telescopic drive 3 to extend, thereby increasing the width of the first annular groove 101. The first conveyor belt "falls" inward along the groove walls on both sides of the first annular groove 101. Since the circumference of the first conveyor belt is fixed, it can only be forced to move towards the bottom wall of the first annular groove 101. The contact point (i.e., the effective transmission diameter) between the first conveyor belt and the groove walls on both sides of the first annular groove 101 will become smaller. According to the transmission ratio formula, if the driven wheel diameter (D) 从动The diameter of the component forming the second annular groove 201 on the passive gear train mechanism 2 remains unchanged, while the diameter of the driving gear (D) remains unchanged. 主动 If the diameter of the component forming the first annular groove 101 on the active gear train mechanism 1 decreases, the transmission ratio will increase. If the input speed of the active gear train mechanism 1 remains unchanged, the output speed of the passive gear train mechanism 2 will decrease. The output speed of the passive gear train mechanism 2 is positively correlated with the speed of the rotating connecting shaft, thus causing the speed of the rotating connecting shaft to decrease as well.

[0023] In this embodiment, the speed adjustment device for the harvesting machinery has a simple structure. An electric telescopic drive 3 is connected to the active wheel mechanism 1 and adjusts the width of the first annular groove 101. After the controller receives the speed adjustment signal, it controls the electric telescopic drive 3 to perform a telescopic operation according to the speed adjustment signal. By adjusting the width of the first annular groove 101, the speed of the rotating connecting shaft is adjusted. This allows the harvesting machinery to automatically and steplessly adjust the speed of the rotating connecting shaft without stopping the machine. It also has the advantages of high adjustment accuracy, rapid response, and low cost.

[0024] In one embodiment of this application, the speed adjustment device further includes a first operating device and a speed detector, both of which are communicatively connected to the controller. The first operating device is used to input the target speed, and the speed detector is used to detect the current speed of the rotating connecting shaft. The speed adjustment signal is the target speed sent by the first operating device. Step S102, which controls the electric telescopic drive 3 to perform the telescopic operation according to the speed adjustment signal, includes the following steps: Step S201: Control the speed detector to detect the current speed of the rotating connecting shaft; Step S202: Calculate the speed adjustment amount of the rotating connecting shaft based on the current speed and the target speed.

[0025] Specifically, in this embodiment, the first operating device can be a touch screen display, and the speed detector can be a speed sensor. After the operator inputs the target speed (i.e., the speed adjustment signal) on the touch screen display, the touch screen display sends the target speed to the controller. After receiving the target speed, the controller controls the speed sensor to detect the current speed of the rotating connecting shaft. After the speed sensor completes the detection, it sends the obtained current speed to the controller. The controller then calculates the absolute value of the difference between the current speed and the target speed. This absolute value of the difference is the speed adjustment amount of the rotating connecting shaft.

[0026] Step S203: Control the electric telescopic drive 3 to perform telescopic operation according to the speed adjustment amount.

[0027] In one embodiment of this application, step S203, which controls the electric telescopic drive 3 to perform the telescopic operation according to the rotational speed adjustment, further includes steps S301-S305, wherein: Step S301: Obtain the first correspondence between the rotational speed adjustment amount and the target width of the first annular groove 101; Step S302: Determine the target width based on the first correspondence and the speed adjustment amount; Step S303: Obtain the second correspondence between the target width and the target extension length of the electric telescopic drive 3; Step S304: Determine the target extension length based on the target width and the second correspondence; Step S305: Control the electric telescopic drive 3 to perform the telescopic operation according to the target extension length.

[0028] Specifically, the controller pre-stores a first correspondence between the speed adjustment amount and the width of the first annular groove 101, which can be retrieved when needed. After obtaining the speed adjustment amount, the controller determines the target width to which the first annular groove 101 should be adjusted based on this speed adjustment amount and the aforementioned correspondence. The controller also pre-stores a second correspondence between the target width and the target extension length of the electric telescopic drive 3, which can be retrieved when needed. After obtaining the target width, the controller determines the target extension length of the electric telescopic drive 3 based on this target width and the aforementioned second correspondence. Then, the controller controls the electric telescopic drive 3 to adjust its extension length based on the aforementioned target extension length until the extension length of the electric telescopic drive 3 matches the target extension length. At this point, the current speed of the rotating connecting shaft matches the target speed, and the controller then controls the electric telescopic drive 3 to stop performing the telescopic operation. The above settings and controls are simple, further improving the automation and intelligence of the speed adjustment device, and reducing labor intensity and labor costs.

[0029] In another embodiment of this application, the speed adjustment device further includes a second operating device and a speed detector for detecting the current speed of the rotating connecting shaft. The second operating device is provided with an operating button. Both the operating button and the speed detector are communicatively connected to the controller. The speed adjustment signal is a signal sent by the operating button indicating that the operating button is in a pressed state. Step S102, which controls the electric telescopic drive 3 to perform telescopic operation according to the speed adjustment signal, includes the following steps: Step S401: Obtain the cumulative duration of a single press of an operation button; Step S402: Determine that the cumulative duration of a single instance is greater than the first preset duration and less than the second preset duration; Step S403: Determine that the speed adjustment device is in jog speed regulation mode; Step S404: Obtain the preset step size value; Step S405: Control the speed detector to detect the current speed of the rotating connecting shaft; Step S406: Calculate the target rotational speed of the rotating connecting shaft based on the current rotational speed and the preset step size value; Step S407: Control the electric telescopic drive 3 to perform the telescopic operation according to the target rotation speed.

[0030] Specifically, in this embodiment, the speed detector can be selected as a speed sensor, and the second operating device can be selected as an armrest box, which is equipped with operating buttons that communicate with the controller (such as CAN bus connection). After the operator presses the operation button, the button is in the pressed state and sends a corresponding signal to the controller (this signal is the speed adjustment signal). The timing module in the controller accumulates the duration of the single signal, that is, it accumulates the duration of the operation button being in the pressed state. The accumulated duration is the single accumulated duration of the operation button being in the pressed state. After obtaining the single accumulated duration, the controller compares it with the first preset duration and the second preset duration. If the controller determines that the accumulated duration is greater than the first preset duration (e.g., 100ms) and less than the second preset duration (e.g., 500ms), it can be determined that the speed adjustment device is in the jog speed regulation mode. The controller has a preset step value stored in it, which can be retrieved when needed. After determining that the speed adjustment device is in the jog speed regulation mode, the controller retrieves the preset step value and controls the speed detector to detect the current speed of the rotating connecting shaft. Then, it calculates the sum of the preset step value and the current speed. This sum is the target speed of the rotating connecting shaft.

[0031] In one embodiment of this application, step S407, which involves controlling the electric telescopic drive 3 to perform the telescopic operation according to the target rotation speed, further includes steps S501-S506, wherein: Step S501: Calculate the speed adjustment amount of the rotating connecting shaft based on the current speed and the target speed; Step S502: Obtain the first correspondence between the rotational speed adjustment amount and the target width of the first annular groove 101; Step S503: Determine the target width based on the first correspondence and the speed adjustment amount; Step S504: Obtain the second correspondence between the target width and the target extension length of the electric telescopic drive 3; Step S505: Determine the target extension length based on the target width and the second correspondence; Step S506: Control the electric telescopic drive 3 to perform the telescopic operation according to the target extension length.

[0032] Specifically, after obtaining the target rotational speed, the controller calculates the absolute value of the difference between the current rotational speed and the target rotational speed. This absolute value is the rotational speed adjustment amount of the rotating connecting shaft. The controller has a pre-stored first correspondence between the rotational speed adjustment amount and the width of the first annular groove 101, which can be retrieved when needed. After obtaining the rotational speed adjustment amount, the controller can determine the target width to which the first annular groove 101 should be adjusted based on the rotational speed adjustment amount and the above correspondence. The controller also has a pre-stored second correspondence between the target width and the target extension length of the electric telescopic drive 3, which can be retrieved when needed. After obtaining the target width, the controller can determine the target extension length of the electric telescopic drive 3 based on the target width and the above second correspondence. Then, the controller controls the electric telescopic drive 3 to adjust its extension length based on the target extension length until the extension length of the electric telescopic drive 3 is consistent with the target extension length. At this time, the current rotational speed of the rotating connecting shaft is consistent with the target rotational speed, and the controller then controls the electric telescopic drive 3 to stop performing the telescopic operation. The above-mentioned settings further enhance the way the rotational connecting shaft speed is adjusted, allowing operators to adjust the speed of the rotating connecting shaft by pressing a jog button. This simplifies operation and further enhances the practicality of the speed adjustment device.

[0033] Furthermore, if it is necessary to adjust the rotational speed of the rotating connecting shaft multiple times through the jog speed adjustment mode, the operator must press the operation button after completing step S506. If the operation button is pressed during the rotational speed adjustment of the rotating connecting shaft, the controller will not respond to the signal sent by the operation button.

[0034] In one embodiment of this application, step S102, which involves controlling the electric telescopic drive 3 to perform the telescopic operation based on the rotation speed adjustment signal, further includes the following steps: Step S601: If the cumulative duration of a single operation is determined to be greater than the second preset duration, determine that the speed adjustment device is in the long press speed adjustment mode; Step S602: Determine the extension and retraction operation time of the electric telescopic drive component 3 based on the cumulative duration of a single operation; Step S603: Control the electric telescopic drive 3 to perform the telescopic operation according to the telescopic operation duration.

[0035] Specifically, after step S401 is completed, the controller determines that the single cumulative duration is greater than the second preset duration (e.g., 500ms) based on the comparison between the single cumulative duration and the second preset duration, and then executes step S601. That is, the controller determines that the speed adjustment device is in the long-press speed adjustment mode. In the long-press speed adjustment mode, the controller controls the electric telescopic drive 3 to perform telescopic operation according to the telescopic operation duration. The telescopic operation duration of the electric telescopic drive 3 is the duration of the telescopic operation performed by the electric telescopic drive 3. This duration is consistent with the single cumulative duration. For example, if the single cumulative duration is 600ms, then the duration of the telescopic operation performed by the electric telescopic drive 3 is also 600ms. When the duration of the telescopic operation performed by the electric telescopic drive 3 reaches the telescopic operation duration (e.g., 600ms), the controller controls the electric telescopic drive 3 to stop performing the telescopic operation, so as to adjust the speed of the rotating connecting shaft by adjusting the width of the first annular groove 101. The above settings further enhance the adjustment of the rotational speed of the connecting shaft, allowing operators to adjust the speed of the connecting shaft by pressing and holding a button. This provides high flexibility and expands the applicable scenarios for the harvesting equipment.

[0036] In one embodiment of this application, the driving gear train mechanism 1 includes: First connecting shaft 102; The first fixed plate 103 has an axial protrusion 1031 and a fixed plate portion 1032. The axial protrusion 1031 is rotatably sleeved on the first connecting shaft 102, and the fixed plate portion 1032 is located on the outer periphery of the axial protrusion 1031 and is connected to the axial protrusion 1031. The first moving plate 104 is movably sleeved on the axial protrusion 1031 and connected to the telescopic end of the electric telescopic drive 3. The first moving plate 104 and the fixed plate 1032 together form the first annular groove 101.

[0037] Specifically, the first connecting shaft 102 is connected to the fixed end of the electric telescopic drive 3. A transmission section is also formed on the first fixed plate 103, and a conveyor belt groove is formed on the transmission section. The active gear train mechanism 1 also includes an active drive component assembly that is driven and communicates with the controller, connected to the first fixed plate 103. The active drive component assembly includes a fixed plate transmission belt, an active pulley, and an active drive component. One end of the fixed plate transmission belt is fitted into the conveyor belt groove, and the other end is fitted onto the active pulley. The active drive component and the active pulley are driven and connected. The controller can control the active drive component to drive the first fixed plate 103 to rotate on the first connecting shaft 102. The first fixed plate 103 transmits power to the first conveyor belt, which then transmits power to the passive gear train mechanism 2 and the rotating connecting shaft of the harvesting machinery to drive the harvesting machinery to perform the corresponding harvesting function.

[0038] In this embodiment, the telescopic end of the electric telescopic drive 3 is the telescopic rod of the electric push rod. The first connecting shaft 102 is connected to the telescopic rod by the first set screw. The active gear mechanism 1 also includes a first bearing 105 seat, a second bearing, and a nylon pad. The first bearing 105 seat is sleeved on the outside of the telescopic end of the electric telescopic drive 3. The second bearing is located between the telescopic end of the electric telescopic drive 3 and the first bearing 105 seat. The inner ring of the second bearing is tightly fitted with the second bearing, and the outer ring of the second bearing is tightly fitted with the inner peripheral wall of the first bearing 105 seat. The first moving plate 104 is located at the end of the first bearing 105 seat near the first moving plate 104 and is connected to the first bearing 105 seat. The nylon pad is disposed between the first bearing 105 seat and the first moving plate 104. The first moving plate 104, the first bearing 105 seat, and the electric telescopic drive 3 together form an annular sliding space. The axial protrusion 1031 is cylindrical and extends at least partially into the annular sliding space. When the electric telescopic drive 3 extends or retracts, the first fixed plate 103 does not move along the extension and retraction direction of the electric telescopic drive 3. The first moving plate 104 moves along with the extension and retraction of the electric telescopic drive 3 under the drive of the electric telescopic drive 3. That is, at this time, the first moving plate 104 moves relative to the first fixed plate 103 along the extension and retraction direction of the electric telescopic drive 3, thereby realizing the width adjustment of the first annular groove 101.

[0039] In one embodiment of this application, the active gear train mechanism 1 further includes a first bearing 105. The inner ring of the first bearing 105 is sleeved on the outer peripheral side of the first connecting shaft 102 and is tightly fitted to the outer peripheral wall of the first connecting shaft 102. The outer ring of the first bearing 105 is tightly fitted to the inner peripheral wall of the axial protrusion 1031. This arrangement can prevent the first fixed plate 103 from transmitting torque to the first connecting shaft 102 when it rotates, thereby avoiding motion interference to the electric telescopic drive member 3.

[0040] In one embodiment of this application, the drive gear train mechanism 1 further includes a protective sleeve 106 sleeved on the outer periphery of the axial protrusion 1031 and located inside the first drive disc 104.

[0041] Specifically, in this embodiment, the protective sleeve 106 is cylindrical and made of nylon. The protective sleeve 106 made of nylon has good wear resistance and can play a good protective role for the first fixed plate 103 and the first moving plate 104 when they move relative to each other, thus avoiding direct friction between the first fixed plate 103 and the first moving plate 104 and shortening their service life.

[0042] In one embodiment of this application, the passive gear train mechanism 2 includes: The second connecting shaft 202 is rotatably disposed on one side of the first connecting shaft 102; The second fixing plate 203 is sleeved on the second connecting shaft 202 and connected to the second connecting shaft 202; The second moving plate 204 is sleeved on the second connecting shaft 202 and together with the second fixed plate 203 forms the second annular groove 201; The conveyor pulley 205 is sleeved on the second connecting shaft 202 and connected to the second connecting shaft 202. The conveyor pulley 205 is connected to the rotating connecting shaft for transmission.

[0043] Specifically, the second connecting shaft 202 and the first connecting shaft 102 are distributed in parallel at intervals. The conveyor belt pulley 205 and the second moving disk 204 are distributed in parallel at intervals on the second connecting shaft 202. The second fixed disk 203 is on the side of the second moving disk 204 away from the conveyor belt pulley 205. The second fixed disk 203 is tightly connected to the second connecting shaft 202 by a fastening bolt assembly. The conveyor belt pulley 205 is tightly connected to the second connecting shaft 202 by screws. The passive gear train mechanism 2 also includes a third bearing and a second bearing seat sleeved on the second connecting shaft 202 and located on the side of the conveyor belt pulley 205 away from the second moving disk 204. The inner ring of the third bearing is tightly fitted with the second connecting shaft 202, and the outer ring of the third bearing is tightly fitted with the inner peripheral wall of the second bearing seat.

[0044] The speed adjustment device also includes a second conveyor belt and an intermediate transmission mechanism. One end of the second conveyor belt is fitted onto the conveyor pulley 205, and the other end is fitted onto the intermediate pulley of the intermediate transmission mechanism. The intermediate transmission mechanism is connected to the rotating connecting shaft of the harvesting machinery. After the first conveyor belt rotates, it transmits power to the second fixed plate 203. The second fixed plate 203 then transmits power sequentially to the second connecting shaft 202, the conveyor pulley 205, the second conveyor belt, the intermediate transmission mechanism, and the rotating connecting shaft of the harvesting machinery, thereby providing power to the rotating connecting shaft and enabling the harvesting machinery to perform the corresponding harvesting function.

[0045] In one embodiment of this application, the second moving disc 204 is movably sleeved on the second connecting shaft 202, and the passive gear train mechanism 2 further includes an elastic pressing member 206 sleeved on the second connecting shaft 202 and with its two ends respectively pressing against the second moving disc 204 and the conveyor belt pulley 205.

[0046] Specifically, a nylon sleeve is provided between the second moving disc 204 and the second connecting shaft 202. This nylon sleeve can prevent direct sliding friction between the second moving disc 204 and the second connecting shaft 202, protecting the second moving disc 204 and the second connecting shaft 202, and helping to further extend the service life of the speed adjustment device. The elastic pressing member 206 can apply a thrust towards the second fixed disc 203 to the second moving disc 204, so that the second moving disc 204 and the second fixed disc 203 are closer to each other. When the width of the first annular groove 101 is at its maximum width (the contact point between the first conveyor belt and the groove walls on both sides of the first annular groove 101 is minimum), the elastic pressing member 206 pushes the second moving disc 204 closest to the second fixed disc 203. At this time, the elastic pressing member 206 is in an extended state and the width of the second annular groove 201 is minimum (i.e., the width of the second annular groove 201 is adjustable in this embodiment), and the contact point between the first conveyor belt and the groove walls on both sides of the second annular groove 201 is maximum, thus facilitating transmission. When the input speed of the drive gear train mechanism 1 remains constant, the rotational speed of the rotating connecting shaft is at its minimum. Conversely, when the width of the first annular groove 101 is at its minimum (the contact point between the first conveyor belt and the groove walls on both sides of the first annular groove 101 is at its maximum), the second moving disc 204 overcomes the elastic force of the elastic pressing member 206 and is furthest from the second fixed disc 203. At this time, the elastic pressing member 206 is in a contracted state, the width of the second annular groove 201 is at its maximum, the contact point between the first conveyor belt and the groove walls on both sides of the second annular groove 201 is at its minimum, the transmission ratio is at its minimum, and the rotational speed of the rotating connecting shaft is at its maximum when the input speed of the drive gear train mechanism 1 remains constant. The above settings further expand the speed adjustment range of the rotating connecting shaft, which is beneficial for further expanding the practicality and application range of the speed adjustment device.

[0047] In one embodiment of this application, a first limiting groove 2041 with an opening facing the conveyor pulley 205 is formed on the second moving disk 204, and a second limiting groove 2051 with an opening facing the second moving disk 204 is formed on the conveyor pulley 205. One end of the elastic pressing member 206 extends into the first limiting groove 2041, and the other end of the elastic pressing member 206 extends into the second limiting groove 2051.

[0048] Specifically, in this embodiment, the elastic pressing member 206 can be selected as a spring. The first limiting groove 2041 and the second limiting groove 2051 are both annular. The spring is sleeved on the second connecting shaft 202 and its two ends press against the bottom wall of the first limiting groove 2041 and the bottom wall of the second limiting groove 2051, respectively. The above arrangement prevents the elastic pressing member 206 from moving and shifting, so that the elastic pressing member 206 can apply a horizontal thrust to the second moving plate 204, thereby making the second moving plate 204 uniformly stressed.

[0049] Another embodiment of this application provides a harvesting machine that includes the speed adjustment device for harvesting machines described in the above embodiments.

[0050] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A speed adjustment device for harvesting machinery, characterized in that, The speed adjustment device includes: An active gear train mechanism (1) has a first annular groove (101) with an adjustable width. A passive gear train mechanism (2) is provided, wherein a second annular groove (201) is formed on the passive gear train mechanism (2) and is connected to the rotating connecting shaft of the harvesting machinery via a transmission. The first conveyor belt has one end sleeved on the active gear train mechanism (1) and clamped in the first annular groove (101), and the other end sleeved on the passive gear train mechanism (2) and clamped in the second annular groove (201). The first conveyor belt can rotate under the drive of the active gear train mechanism (1). The electric telescopic drive component (3) is driven to connect with the active wheel system mechanism (1); The controller, which is communicatively connected to the electric telescopic drive (3) and configured to: Confirmation that the speed adjustment signal has been received; The electric telescopic drive (3) is controlled to perform telescopic operation according to the speed adjustment signal. The rotating connecting shaft is adjusted by adjusting the width of the first annular groove (101). The rotational speed.

2. The speed adjustment device for harvesting machinery according to claim 1, characterized in that, The speed adjustment device further includes a first operating device and a speed detector, both of which are communicatively connected to the controller. The first operating device is used to input the target speed, and the speed detector is used to detect the current speed of the rotating connecting shaft. The speed adjustment signal is the target speed sent by the first operating device. The step of controlling the electric telescopic drive (3) to perform telescopic operation according to the speed adjustment signal includes: The speed detector is controlled to detect the current speed of the rotating connecting shaft; The rotational speed adjustment amount of the rotating connecting shaft is calculated based on the current rotational speed and the target rotational speed; The electric telescopic drive (3) is controlled to perform the telescopic operation according to the speed adjustment amount.

3. The speed adjustment device for harvesting machinery according to claim 2, characterized in that, The step of controlling the electric telescopic drive (3) to perform the telescopic operation according to the speed adjustment amount includes: Obtain a first correspondence between the rotational speed adjustment amount and the target width of the first annular groove (101); The target width is determined based on the first correspondence and the rotational speed adjustment amount; Obtain a second correspondence between the target width and the target extension length of the electric telescopic drive (3); The target extension length is determined based on the target width and the second correspondence. The electric telescopic drive (3) is controlled to perform the telescopic operation according to the target extension length.

4. The speed adjustment device for harvesting machinery according to claim 1, characterized in that, The speed adjustment device further includes a second operating device and a speed detector for detecting the current speed of the rotating connecting shaft. The second operating device is provided with an operating button. Both the operating button and the speed detector are communicatively connected to the controller. The speed adjustment signal is a signal sent by the operating button indicating that the operating button is in a pressed state. Controlling the electric telescopic drive (3) to perform telescopic operation according to the speed adjustment signal includes: Obtain the cumulative duration of a single press of the operation button; It is determined that the single cumulative duration is greater than the first preset duration and less than the second preset duration; It is determined that the speed adjustment device is in jog speed regulation mode; Get the preset step size value; The speed detector is controlled to detect the current speed of the rotating connecting shaft; Calculate the target rotational speed of the rotating connecting shaft based on the current rotational speed and the preset step size value; The electric telescopic drive (3) is controlled to perform the telescopic operation according to the target rotation speed.

5. The speed adjustment device for harvesting machinery according to claim 4, characterized in that, The step of controlling the electric telescopic drive (3) to perform the telescopic operation according to the target rotation speed includes: The rotational speed adjustment amount of the rotating connecting shaft is calculated based on the current rotational speed and the target rotational speed; Obtain a first correspondence between the rotational speed adjustment amount and the target width of the first annular groove (101); The target width is determined based on the first correspondence and the rotational speed adjustment amount; Obtain a second correspondence between the target width and the target extension length of the electric telescopic drive (3); The target extension length is determined based on the target width and the second correspondence. The electric telescopic drive (3) is controlled to perform the telescopic operation according to the target extension length.

6. The speed adjustment device for harvesting machinery according to claim 4, characterized in that, The step of controlling the electric telescopic drive (3) to perform telescopic operation according to the speed adjustment signal further includes: If it is determined that the single cumulative duration is greater than the second preset duration, it is determined that the speed adjustment device is in the long press speed adjustment mode; The telescopic operation duration of the electric telescopic drive (3) is determined based on the single cumulative duration. The electric telescopic drive (3) is controlled to perform the telescopic operation according to the duration of the telescopic operation.

7. The speed adjustment device for harvesting machinery according to claim 1, characterized in that, The active gear train mechanism (1) includes: First connecting shaft (102); A first fixed plate (103) has an axial protrusion (1031) and a fixed plate portion (1032) formed thereon. The axial protrusion (1031) is rotatably sleeved on the first connecting shaft (102). The fixed plate portion (1032) is located on the outer periphery of the axial protrusion (1031) and is connected to the axial protrusion (1031). The first moving plate (104) is movably sleeved on the axial protrusion (1031) and connected to the telescopic end of the electric telescopic drive (3). The first moving plate (104) and the fixed plate (1032) together form the first annular groove (101).

8. The speed adjustment device for harvesting machinery according to claim 7, characterized in that, The passive gear train mechanism (2) includes: The second connecting shaft (202) is rotatably disposed on one side of the first connecting shaft (102); The second fixing plate (203) is sleeved on the second connecting shaft (202) and connected to the second connecting shaft (202); The second moving plate (204) is sleeved on the second connecting shaft (202) and together with the second fixed plate (203) forms the second annular groove (201). The conveyor pulley (205) is sleeved on the second connecting shaft (202) and connected to the second connecting shaft (202). The conveyor pulley (205) is connected to the rotating connecting shaft for transmission.

9. The speed adjustment device for harvesting machinery according to claim 8, characterized in that, The second moving disc (204) is movably mounted on the second connecting shaft (202). The passive wheel mechanism (2) also includes an elastic pressing member (206) mounted on the second connecting shaft (202) and with its two ends pressing against the second moving disc (204) and the conveyor belt wheel (205) respectively.

10. A harvesting machine, characterized in that, The harvesting machinery includes a speed adjustment device for harvesting machinery according to any one of claims 1-9.

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