Chinese cabbage harvester and secondary cutting device and method for roots of chinese cabbage

Abstract

A Chinese cabbage harvester and a Chinese cabbage root secondary cutting device and method thereof, the Chinese cabbage harvester comprising the Chinese cabbage root secondary cutting device, the device comprising: a support provided with a bottom plate at a top end, the bottom plate being provided with a root hole; a driving mechanism installed on the support and located below the bottom plate; a rotating holding mechanism comprising a driving holding blade and an auxiliary holding blade oppositely arranged, the driving holding blade and the auxiliary holding blade being respectively installed on the bottom plate through a first vertical shaft and a second vertical shaft and rotating around their own axes under the driving of the first vertical shaft and the second vertical shaft; the first vertical shaft and the second vertical shaft being respectively located on two sides of the root hole; the first vertical shaft being connected with the driving mechanism; a cutting knife being installed on the bottom plate corresponding to the rotating holding mechanism and being connected with the driving mechanism; and a control mechanism being connected with the driving mechanism and the rotating holding mechanism respectively to control the driving mechanism to drive the cutting knife to cooperate with the rotating holding mechanism to complete the secondary cutting of the Chinese cabbage root. The application also provides a Chinese cabbage root secondary cutting method.

Description

Technical Field

[0001] This invention relates to agricultural machinery technology, and in particular to a cabbage harvester and its secondary cutting device and method for cabbage roots. Background Technology

[0002] Chinese cabbage holds a crucial position in food consumption due to its excellent economic and nutritional value. Furthermore, its high yield per unit area, good storage and transportation properties, and long supply period have led to a steady increase in harvested area and yield year by year, maintaining a generally high level. However, Chinese cabbage cultivation is generally relatively scattered and small-scale, with a low overall level of mechanization and industrialization. Currently, harvesting still relies mainly on manual labor, resulting in low efficiency, high labor intensity, high operating costs, and difficulty in controlling the quality and efficiency of manual harvesting. Existing Chinese cabbage harvesters and related equipment suffer from low efficiency and high damage rates, significantly limiting the efficiency and profitability of Chinese cabbage production. Moreover, the root cutting requirements during harvesting are high, and existing harvesters suffer from inaccurate root cutting, high damage rates during mechanized harvesting, and low automation levels. Therefore, providing a secondary precision root cutting device for Chinese cabbage harvesters that can reduce damage rates and increase harvesting efficiency is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies of the prior art by providing a cabbage harvester and a secondary cutting device and method for the cabbage root.

[0004] To achieve the above objectives, the present invention provides a secondary cutting device for the root of Chinese cabbage, comprising:

[0005] The support has a base plate at the top, and the base plate has root holes for accommodating the roots of the cabbage.

[0006] A drive mechanism is mounted on the bracket and located below the base plate;

[0007] A rotating clamping mechanism for flexibly clamping cabbage includes an active clamping blade and an auxiliary clamping blade arranged opposite each other. The active clamping blade and the auxiliary clamping blade are respectively mounted on the base plate via a first vertical shaft and a second vertical shaft, and rotate around their own axes under the drive of the first vertical shaft and the second vertical shaft, respectively. The first vertical shaft and the second vertical shaft are respectively located on both sides of the root hole. The first vertical shaft is connected to the driving mechanism.

[0008] A cutting blade, mounted on the base plate corresponding to the rotating holding mechanism and connected to the drive mechanism, is used to cut the root of the clamped cabbage; and

[0009] A control mechanism is connected to the drive mechanism and the rotating holding mechanism respectively, so as to control the drive mechanism to drive the cutting blade to cooperate with the rotating holding mechanism to complete the secondary cutting of the cabbage root.

[0010] The aforementioned secondary cutting device for the root of cabbage includes a control mechanism comprising a controller, a data acquisition module, a rotary clamp speed sensor, a cutting blade speed sensor, and an electromagnetic clutch. The data acquisition module is connected to the controller, the rotary clamp speed sensor, and the cutting blade speed sensor, respectively. The rotary clamp speed sensor is mounted on the active clamp blade, and the cutting blade speed sensor is mounted on the cutting blade. The electromagnetic clutch is mounted on the first vertical shaft and connected to the controller for rapidly and smoothly braking the active clamp blade.

[0011] The aforementioned secondary cutting device for the root of cabbage includes a control mechanism that further comprises a rotation damper mounted on the second vertical shaft, used to adaptively adjust the clamping angle and clamping torque according to the size of the cabbage.

[0012] The aforementioned secondary cutting device for the roots of cabbage includes a control mechanism that further comprises a clamping and conveying sensor, which is installed on the rotating shaft of the clamping and conveying device of the cabbage harvester and connected to the controller, for real-time detection of the rotation speed and direction of the clamping and conveying device.

[0013] The aforementioned secondary cutting device for the root of cabbage, wherein the driving mechanism includes:

[0014] A drive motor is mounted on the bracket and located below the base plate;

[0015] A drive shaft, located below the base plate, has one end connected to the drive motor and the other end connected to the cutting blade; and

[0016] The sprocket drive mechanism is connected to the first vertical shaft and the drive shaft respectively.

[0017] In the aforementioned secondary cutting device for the roots of cabbage, the cutting blade is a serrated or star-shaped concave disc blade, which is mounted above the base plate via the drive shaft and located between the active clamping blade and the auxiliary clamping blade on the side near the root hole.

[0018] The aforementioned secondary cutting device for the root of cabbage includes an active clamping blade comprising a pair of arc-shaped blades arranged symmetrically at the center; and an auxiliary clamping blade comprising three blades with an angle of 120° between them, each blade having the same curvature.

[0019] In the aforementioned secondary cutting device for the root of cabbage, both the arc-shaped blade and the blade are made of flexible steel, and the inner surfaces of both the arc-shaped blade and the blade are provided with continuous textures.

[0020] To better achieve the above objectives, the present invention also provides a method for secondary cutting of the root of Chinese cabbage, comprising the following steps:

[0021] S100. Start the cabbage harvester and activate the secondary cutting device at the cabbage root.

[0022] S200. The cabbage harvester’s front end pulls up the cabbage with its roots and removes a portion of the roots, and then the cabbage is conveyed to the cabbage root secondary cutting device at the rear end via the clamping and conveying device.

[0023] S300: The controller controls the start and stop of the electromagnetic clutch and / or adjusts the speed of the drive motor according to the set conditions to complete the automatic control of the secondary flexible cutting of the cabbage root.

[0024] S400. When the root of the cabbage falls into the root hole of the bottom plate of the secondary cutting device for the cabbage root, the electromagnetic clutch is disengaged, the active clamping blade brakes quickly and smoothly, and the rotary damper adaptively adjusts the clamping angle and clamping torque of the active clamping blade and the auxiliary clamping blade according to the size of the cabbage. The active clamping blade and the auxiliary clamping blade cooperate to flexibly clamp the cabbage falling from the clamping and conveying device.

[0025] S500, the cutting blade rotates and cuts off the root of the cabbage, completing a secondary cut of the cabbage root; and

[0026] S600, the electromagnetic clutch engages, the active clamping blade continues to rotate, pushing the cabbage that has completed the secondary cutting of the root into the cabbage collection device.

[0027] To better achieve the above objectives, the present invention also provides a cabbage harvester, which includes the aforementioned secondary cutting device for cabbage roots.

[0028] The technical effects of this invention are as follows:

[0029] 1) The secondary cutting device for cabbage roots of the present invention can realize secondary flexible cutting of cabbage roots by rotating clamping. The active clamping blade cooperates with the auxiliary clamping blade to clamp the cabbage falling from the conveying mechanism from above. Both the active clamping blade and the auxiliary clamping blade have a certain curvature and the surface is provided with continuous and uninterrupted texture, which can better fit the surface of the cabbage and accurately cut the cabbage root with the cutting blade. The electromagnetic clutch installed on the first vertical shaft provides a large torque, so that it brakes quickly and smoothly. The clamping angle of the two sets of rotating blades is adaptively adjusted according to the different sizes of cabbage by the rotation damper installed on the second vertical shaft, providing a suitable clamping torque to realize the secondary cutting operation of cabbage roots and reduce the mechanical damage rate of cabbage harvesting.

[0030] 2) The rotating clamping type secondary flexible cutting method for cabbage roots of the present invention uses the front-end pulling and cutting device to pull up the cabbage along with its roots and remove part of the roots. The cabbage is then conveyed upward to the rear secondary cutting device through the clamping and conveying device. After the secondary flexible cutting is completed, the cabbage continues to rotate with the assistance of the active clamping leaves and finally falls into the cabbage collection device. This method can adapt to the harvesting operation of different varieties and different row spacings of cabbage and improve the cutting accuracy of the cabbage roots.

[0031] 3) This invention achieves real-time feedback on the root cutting speed of the cabbage harvester by detecting the rotation speed of the clamping and conveying device, the rotation speed of the rotating clamping blade, and the cutting blade. The controller can control the start and stop of the electromagnetic clutch and adjust the speed of the drive motor according to the set conditions, which improves the response speed and control accuracy of the cabbage root cutting control. Compared with the manual adjustment method of cabbage root cutting in the prior art, the level of automation is higher. It can adapt to the harvesting operation of different varieties and different row spacings of cabbage, improve the cutting accuracy of cabbage roots, reduce labor costs and the mechanical damage rate of cabbage, and further improve the harvesting efficiency of cabbage.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a cabbage harvester according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of a secondary cutting device for the root of cabbage according to an embodiment of the present invention;

[0035] Figure 3 This is a top view of a cabbage root secondary cutting device according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the working principle of the control mechanism according to an embodiment of the present invention;

[0037] Figure 5 This is a flowchart of a method for secondary cutting of the root of a Chinese cabbage according to an embodiment of the present invention.

[0038] Among them, the attached reference numerals

[0039] 1. Chassis

[0040] 2. Pull-out cutting device

[0041] 3 Clamping and conveying device

[0042] 4. Cabbage root secondary cutting device

[0043] 41 Bracket

[0044] 42 base plate

[0045] 421 root hole

[0046] 43 Rotating holding mechanism

[0047] 431 Active clamping blade

[0048] 432 Auxiliary clamping blade

[0049] 44 First Vertical Axis

[0050] 45 Second vertical axis

[0051] 46 Drive mechanism

[0052] 461 drive motor

[0053] 462 Drive shaft

[0054] 463 Chain drive mechanism

[0055] 47 Control mechanism

[0056] 471 Data Acquisition Module

[0057] 472 Controller

[0058] 473 Rotary clamp speed sensor

[0059] 474 Cutting blade speed sensor

[0060] 475 Clamping and Conveying Sensor

[0061] 476 Electromagnetic Clutch

[0062] 477 Rotary Damper

[0063] 48 Cutting blade

[0064] 5. Collection device

[0065] 6 racks

[0066] S100-S600 Steps Detailed Implementation

[0067] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0068] It should be understood in the description of this invention that the terms "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings. They are only for the convenience of describing the structure and operation of this invention, and do not indicate or imply that the part referred to must have a specific orientation or be operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] See Figure 1 , Figure 1 This is a schematic diagram of a cabbage harvester according to an embodiment of the present invention. The cabbage harvester of the present invention is a tracked self-propelled cabbage harvester, including a chassis 1 and a pulling and cutting device 2, a clamping and conveying device 3, a cabbage root secondary cutting device 4, and a collecting device 5 mounted on the chassis 1. The pulling and cutting device 2 is installed at the front end of the chassis 1 and is used to pull up the cabbage along with its roots and remove a portion of the roots before conveying it to the clamping and conveying device 3. The two ends of the clamping and conveying device 3 are respectively provided corresponding to the pulling and cutting device 2 and the cabbage root secondary cutting device 4, and are used to convey the cabbage with the roots partially removed by the pulling and cutting device 2 to the cabbage root secondary cutting device 4 at the rear end. The cabbage root secondary cutting device 4 is installed on the chassis 1 and located at the rear end of the clamping and conveying device 3. The collecting device 5 is located to the side and rear of the cabbage root secondary cutting device 4 and is used to collect the cabbage after the secondary root cutting operation is completed. Since the composition, structure, relative positions, connection relationships and functions of other parts of this invention are all mature existing technologies, they will not be described in detail here. The following is a detailed description of the cabbage root secondary cutting device 4 and method of this invention.

[0070] See Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the secondary cutting device 4 for the root of cabbage according to an embodiment of the present invention. Figure 3This is a top view of a secondary cabbage root cutting device 4 according to an embodiment of the present invention. The secondary cabbage root cutting device 4 of the present invention includes: a support 41, mounted on a horizontal frame 6 on a cabbage harvester chassis 1, with a base plate 42 at the top of the support 41, the base plate 42 having root holes 421 for accommodating cabbage roots; a drive mechanism 46, mounted on the support 41 and located below the base plate 42; and a rotating holding mechanism 43 for catching and flexibly clamping cabbage falling from the clamping and conveying mechanism, the rotating holding mechanism 43 including an active clamping blade 431 and an auxiliary clamping blade 432 arranged opposite to each other, the active clamping blade 431 and the auxiliary clamping blade 432 being mounted on the base plate 42 via a first vertical shaft 44 and a second vertical shaft 45 respectively, and rotating around their own axes under the drive of the first vertical shaft 44 and the second vertical shaft 45 respectively; the first vertical shaft 44 and the second vertical shaft 45 are... The first vertical shaft 44 and the second vertical shaft 45 are preferably symmetrically arranged about the center line of the root hole 421, and their axes are parallel to the center line of the root hole 421. The distance between the first vertical shaft 44 and the second vertical shaft 45 can be set according to the size of the cabbage. The first vertical shaft 44 is connected to the drive mechanism 46. The cutting blade 48, corresponding to the rotating holding mechanism 43, is mounted on the base plate 42 and connected to the drive mechanism 46. It is used to cut the root of the clamped cabbage. The control mechanism 47 is connected to the drive mechanism 46 and the rotating holding mechanism 43 respectively, so as to control the drive mechanism 46 to drive the cutting blade 48 to cooperate with the rotating holding mechanism 43 to complete the flexible secondary cutting operation of the cabbage root, thereby reducing the mechanical damage rate of the cabbage harvesting operation.

[0071] See Figure 4 , Figure 4 This is a schematic diagram illustrating the working principle of the control mechanism 47 according to an embodiment of the present invention. The control mechanism 47 in this embodiment includes a controller 472, a data acquisition module 471, a rotary clamp speed sensor 473, a cutting blade speed sensor 474, and an electromagnetic clutch 476. The data acquisition module 471 is connected to the controller 472, the rotary clamp speed sensor 473, and the cutting blade speed sensor 474, respectively. The rotary clamp speed sensor 473 is mounted on the active clamp blade 431, and the cutting blade speed sensor 474 is mounted on the cutting blade 48. The electromagnetic clutch 476 is disposed on the first vertical shaft 44 and connected to the controller 472, and is used to provide a large torque to quickly and smoothly brake the active clamp blade 431.

[0072] The control mechanism 47 may further include a rotary damper 477, mounted on the second vertical shaft 45, for adaptively adjusting the clamping angles of the active clamping blades 431 and the auxiliary clamping blades 432 according to the different sizes of the cabbage, and providing a suitable clamping torque to achieve secondary flexible cutting. The electromagnetic clutch 476 and the rotary damper 477 may be respectively clamped at the lower ends of the first vertical shaft 44 and the second vertical shaft 45, and are bolted to the base plate 42 for easy replacement after wear or failure.

[0073] In this embodiment, the control mechanism 47 further includes a clamping and conveying sensor 475, which is installed on the rotating shaft of the clamping and conveying device 3 of the cabbage harvester and connected to the controller 472 for real-time detection of the rotational speed and direction of the clamping and conveying device 3. The clamping and conveying sensor 475 is preferably a magnetoelectric sensor. The magnetoelectric sensor converts a magnetic field signal into an electrical signal using the magnetoelectric effect. When the clamping and conveying device 3 is in operation, the magnetic field acts on a conductor in the magnetic material, generating a potential difference across the conductor, which in turn generates an electrical signal. The frequency of the electrical signal is proportional to the rotational speed. The formula for measuring the rotational speed using the magnetoelectric sensor is as follows:

[0074] N = f × 60 / p;

[0075] Wherein, N represents the rotational speed of the clamping and conveying device 3, f represents the signal frequency converted by the magnetoelectric sensor, and p represents the number of magnetic poles.

[0076] In this embodiment, the driving mechanism 46 includes: a drive motor 461, which is mounted and fixed on the bracket 41 and located below the base plate 42. The drive motor 461 is preferably a right-angle motor; a transmission shaft 462, located below the base plate 42, with one end of the transmission shaft 462 connected to the drive motor 461 and the other end of the transmission shaft 462 connected to the cutting blade 48, so as to transfer the kinetic energy of the drive motor 461 to the cutting blade 48 and drive the cutting blade 48 to rotate; and a sprocket transmission mechanism 463, which is connected to the first vertical shaft 44 and the transmission shaft 462 respectively, and transfers the kinetic energy from the transmission shaft 462 to the first vertical shaft 44, so that the first vertical shaft 44 drives the active clamping blade 431 to rotate.

[0077] In this embodiment, the cutting blade 48 is a serrated or star-shaped concave disc blade to facilitate insertion of the cabbage root into the root hole 421 and to rotate the cabbage root during cutting. The cutting blade 48 is mounted above the base plate 42 via the drive shaft 462 and is located on the side near the root hole 421 between the active clamping blade 431 and the auxiliary clamping blade 432. The active clamping blade 431 comprises a pair of centrally symmetrically arranged arc-shaped blades; the auxiliary clamping blade 432 comprises three blades with an included angle of 120°, each blade having the same curvature. Both the arc-shaped blades and the auxiliary blades are preferably made of flexible steel, and their inner surfaces can be provided with continuous textures for better conformity to the cabbage surface.

[0078] During operation, feedback values ​​from each sensor are transmitted to the controller 472 via the data acquisition module 471. The controller 472 controls the start and stop of the electromagnetic clutch 476 and adjusts the speed of the drive motor 461 according to set conditions to complete the automatic control of the secondary flexible cutting of the cabbage root. These set conditions can be based on time, the transmission speed of the clamping conveyor 3 and the speed of the cutting blade 48, or the relative speed between the clamping conveyor 3 and the drive motor 461, etc. For example, the start and stop time of the electromagnetic clutch 476 can be set according to the rotation speed of the clamping and conveying device 3 to control the rotation or stop of the active clamping blade 431, and the rotation speed of the drive motor 461 can be adjusted to control the rotation speed of the cutting blade 48 to precisely control the cutting time; the feedback values ​​of each sensor can be compared with the preset values, and the target control quantity of the drive motor 461 and the start and stop of the electromagnetic clutch 476 can be dynamically adjusted according to the comparison value; or a limit switch, laser beam sensor, etc. can be set for the root hole 421 to collect and send corresponding signals to the controller 472. When the cabbage root enters or is cut off from the root hole 421, the controller 472 receives the corresponding signal collected and sent by the limit switch or laser beam sensor, and controls the start and stop of the electromagnetic clutch 476 and adjusts the rotation speed of the drive motor 461 according to the received signal. When the cabbage root enters the root hole 421, the controller 472 disengages the electromagnetic clutch 476, and the sprocket transmission mechanism 463 disconnects from the first vertical shaft 44, causing the active clamping blade 431 to quickly and smoothly stop rotating. This, in conjunction with the auxiliary clamping blade 432, completes a flexible clamping of the cabbage. The cutting blade 48 continues to rotate, performing a secondary flexible cut on the cabbage root. After the cutting blade 48 completes the cut, the controller 472 engages the electromagnetic clutch 476, and the sprocket transmission mechanism 463, via the first vertical shaft 44, quickly drives the active clamping blade 431 to continue rotating, pushing the cabbage into the collection device 5. This configuration is only required to achieve the above-mentioned operational control; no restrictions are imposed.

[0079] See Figure 5 , Figure 5 This is a flowchart illustrating a method for secondary cutting of cabbage roots according to an embodiment of the present invention. The method for secondary cutting of cabbage roots according to the present invention includes the following steps:

[0080] Step S100: Start the cabbage harvester and activate the secondary cutting device 4 for the cabbage roots;

[0081] Step S200: After the cabbage is pulled up by the front end of the cabbage harvester and a portion of the root is removed, the cabbage is transported to the secondary cabbage root cutting device 4 at the rear end by the clamping and conveying device 3.

[0082] In step S300, the controller 472 controls the start and stop of the electromagnetic clutch 476 and / or adjusts the speed of the drive motor 461 according to the set conditions to complete the automatic control of the secondary flexible cutting of the cabbage root.

[0083] Step S400: When the root of the cabbage falls into the root hole 421 of the base plate 42 of the secondary cabbage root cutting device 4, the electromagnetic clutch 476 is disengaged, the active clamping blade 431 brakes quickly and smoothly, and the rotary damper 477 adaptively adjusts the clamping angle and clamping torque of the active clamping blade 431 and the auxiliary clamping blade 432 according to the different sizes of the cabbage. The active clamping blade 431 and the auxiliary clamping blade 432 cooperate to flexibly clamp the cabbage falling from the clamping and conveying device 3.

[0084] Step S500: The cutting blade 48 continues to rotate and accurately cuts off the root of the cabbage, completing the secondary cutting of the cabbage root; and

[0085] In step S600, the electromagnetic clutch 476 engages, and the active clamping blade 431 continues to rotate, pushing the cabbage that has completed the secondary cutting of the root into the cabbage collecting device 5, thus realizing the harvesting of cabbage.

[0086] This invention can meet the requirements of root cutting accuracy and harvesting efficiency in mechanized cabbage harvesting, and reduce the damage rate during mechanized cabbage harvesting. The active clamping blade 431 of the secondary cabbage root cutting device 4, in conjunction with the auxiliary clamping blade 432, flexibly clamps the cabbage falling from the conveyor 3 from above, and accurately cuts the cabbage root with the cutting blade 48. A large torque is provided by the electromagnetic clutch 476 mounted on the first vertical shaft 44, enabling rapid and smooth braking. A rotational damper 477 mounted on the second vertical shaft 45 adaptively adjusts the clamping angles of the active clamping blade 431 and the auxiliary clamping blade 432 according to different cabbage sizes, providing a suitable clamping torque. This enables precise secondary cutting of the cabbage root, control of the cutting blade 48's rotation speed, start / stop control of the electromagnetic clutch 476, and detection of the rotation speed of the conveyor 3. It can adapt to different varieties and row spacings of cabbage harvesting, improving the cutting accuracy of the cabbage root, reducing labor costs and the mechanical damage rate of cabbage, and further enhancing the harvesting efficiency of cabbage.

[0087] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A device for secondary cutting of cabbage roots, characterized in that, include: The support has a base plate at the top, and the base plate has root holes for accommodating the roots of the cabbage. A drive mechanism is mounted on the bracket and located below the base plate; A rotating clamping mechanism for flexibly clamping cabbage includes an active clamping blade and an auxiliary clamping blade arranged opposite each other. The active clamping blade and the auxiliary clamping blade are respectively mounted on the base plate via a first vertical shaft and a second vertical shaft, and rotate around their own axes under the drive of the first vertical shaft and the second vertical shaft, respectively. The first vertical shaft and the second vertical shaft are respectively located on both sides of the root hole. The first vertical shaft is connected to the driving mechanism. A cutting blade, corresponding to the rotating holding mechanism, is mounted on the base plate and connected to the drive mechanism, and is used to cut the root of the clamped cabbage; as well as A control mechanism is connected to the drive mechanism and the rotating holding mechanism respectively, so as to control the drive mechanism to drive the cutting blade to cooperate with the rotating holding mechanism to complete the secondary cutting of the cabbage root; The control mechanism includes a controller, a data acquisition module, a rotary clamp speed sensor, a cutting blade speed sensor, and an electromagnetic clutch. The data acquisition module is connected to the controller, the rotary clamp speed sensor, and the cutting blade speed sensor, respectively. The rotary clamp speed sensor is mounted on the active clamp blade, and the cutting blade speed sensor is mounted on the cutting blade. The electromagnetic clutch is located on the first vertical shaft and connected to the controller, and is used to quickly and smoothly brake the active clamp blade.

2. The secondary cutting device for the root of cabbage as described in claim 1, characterized in that, The control mechanism also includes a rotation damper, which is mounted on the second vertical shaft and is used to adaptively adjust the clamping angle and clamping torque according to the size of the cabbage.

3. The secondary cutting device for the root of cabbage as described in claim 1, characterized in that, The control mechanism also includes a clamping and conveying sensor, which is installed on the rotating shaft of the clamping and conveying device of the cabbage harvester and connected to the controller, for real-time detection of the rotation speed and direction of the clamping and conveying device.

4. The secondary cutting device for the root of cabbage as described in claim 1, characterized in that, The drive mechanism includes: A drive motor is mounted on the bracket and located below the base plate; A drive shaft, located below the base plate, has one end connected to the drive motor and the other end connected to the cutting blade; and The sprocket drive mechanism is connected to the first vertical shaft and the drive shaft respectively.

5. The secondary cutting device for the root of cabbage as described in claim 4, characterized in that, The cutting blade is a concave disc blade with serrated or star-shaped teeth, which is mounted above the base plate via the drive shaft and located on the side of the active clamping blade and the auxiliary clamping blade near the root hole.

6. The secondary cutting device for the root of cabbage as described in claim 1, characterized in that, The active clamping blades include a pair of arc-shaped blades arranged symmetrically at the center; the auxiliary clamping blades include blades with an included angle of 120° between them. o The three blades, each having the same curvature.

7. The secondary cutting device for the root of cabbage as described in claim 6, characterized in that, Both the arc-shaped blade and the blade are made of flexible steel, and the inner surfaces of both the arc-shaped blade and the blade are provided with continuous textures.

8. A method for secondary cutting of the root of a Chinese cabbage, characterized in that, The cabbage root secondary cutting device according to any one of claims 1-7 comprises the following steps: S100. Start the cabbage harvester and activate the secondary cutting device at the cabbage root. S200. The cabbage harvester’s front end pulls up the cabbage with its roots and removes a portion of the roots, and then the cabbage is conveyed to the cabbage root secondary cutting device at the rear end via the clamping and conveying device. S300: The controller controls the start and stop of the electromagnetic clutch and / or adjusts the speed of the drive motor according to the set conditions to complete the automatic control of the secondary flexible cutting of the cabbage root. S400. When the root of the cabbage falls into the root hole of the bottom plate of the secondary cutting device for the cabbage root, the electromagnetic clutch is disengaged, the active clamping blade brakes quickly and smoothly, and the rotary damper adaptively adjusts the clamping angle and clamping torque of the active clamping blade and the auxiliary clamping blade according to the size of the cabbage. The active clamping blade and the auxiliary clamping blade cooperate to flexibly clamp the cabbage falling from the clamping and conveying device. S500: The cutting blade rotates and cuts off the root of the cabbage, completing the secondary cutting of the cabbage root; as well as S600, the electromagnetic clutch engages, the active clamping blade continues to rotate, pushing the cabbage that has completed the secondary cutting of the root into the cabbage collection device.

9. A cabbage harvester, characterized in that, The device includes the secondary cutting device for the root of cabbage as described in any one of claims 1-7.

Images