Stalk smashing device for corn harvester

Abstract

The utility model is suitable for the technical field of stalk crushing, and provides a stalk crushing device for a corn harvester, which comprises a mounting cover, the crushing shaft is rotationally mounted in the mounting cover; the rotating motor is fixedly mounted on the mounting cover, and an output shaft of the rotating motor is fixedly connected with the crushing shaft; the two rotating shafts are both rotationally mounted on the mounting cover; the number of the cutting knives is multiple, and the multiple cutting knives are arranged on the two rotating shafts in a sleeving mode correspondingly; the exhaust pipe is fixedly mounted on the mounting cover; and the number of the air injection pipes is multiple, and the multiple air injection pipes are all fixedly installed on the exhaust pipe. According to the stalk smashing device for the corn harvester, stalks can be prevented from being wound on the rotating shaft, meanwhile, the rotating shaft can be helped to be cooled, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of stalk crushing, and particularly relates to a stalk crushing device for a corn harvester. Background Art

[0002] The corn stalk refers to the main stem and side branches of the corn plant, also known as the corn straw. The corn stalk is a plant tissue rich in cellulose, usually having a relatively high fiber content and a relatively low moisture content. Therefore, returning straw to the field has profound environmental protection significance.

[0003] During the process of stalk crushing, due to the relatively long length, high fiber content and high moisture content of the stalks, when the stalks are wound into the crushing device for crushing, it is easy for the stalks to wind around the winding device, resulting in blockage during the stalk crushing process. At the same time, due to the too fast rotation of the rotating shaft during the crushing process, it is easy to cause too high a temperature, affecting the service life of the equipment. Content of the Utility Model

[0004] The utility model provides a stalk crushing device for a corn harvester, aiming to solve the problems in the above-mentioned background art that the currently used stalk crushing device is easy to wind the stalks around the rotating shaft, and at the same time, the rotating shaft lacks a cooling mechanism, which will cause too high a temperature and affect the service life of the equipment.

[0005] To solve the above problems, the utility model is realized as follows. A stalk crushing device for a corn harvester includes: a mounting cover; a crushing shaft rotatably mounted in the mounting cover; a rotating motor fixedly mounted on the mounting cover, and an output shaft of the rotating motor is fixedly connected to the crushing shaft; two rotating shafts both rotatably mounted on the mounting cover; a plurality of cutting knives sleeved on the two rotating shafts respectively; an exhaust pipe fixedly mounted on the mounting cover; a plurality of air injection pipes fixedly mounted on the exhaust pipe, and the plurality of air injection pipes are correspondingly arranged with the crushing shaft and the two rotating shafts; an air pump fixedly mounted on the mounting cover; a connecting pipe fixedly mounted at an output end of the air pump, and the connecting pipe is fixedly connected to the exhaust pipe; a driving mechanism arranged on the mounting cover for driving the rotating shafts and the cutting knives to rotate.

[0006] Preferably, the driving mechanism includes two gears, a transmission belt, a tensioning pulley and a driving motor. The two gears are respectively fixedly installed on the two rotating shafts. The transmission belt is sleeved on the two gears. The tensioning pulley is rotatably installed on the mounting cover. The tensioning pulley abuts against the transmission belt. The driving motor is fixedly installed on the mounting cover. The output shaft of the driving motor is fixedly connected to any one of the gears.

[0007] Preferably, a collecting device is provided on the mounting cover for collecting the crushed corn stalks. The collecting device includes a fan, a connecting pipe and a feeding port. The fan is fixedly installed on the mounting cover. The connecting pipe is fixedly installed inside the mounting cover. The connecting pipe is arranged corresponding to the fan. The feeding port is opened on the connecting pipe.

[0008] Preferably, a clamp is sleeved on the connecting pipe. A fastening bolt is provided on the clamp. A double-wing nut is threadedly installed on the fastening bolt.

[0009] Preferably, a connecting mechanism is provided on the mounting cover for connecting the mounting cover to the harvester. The connecting mechanism includes two fixing blocks, a movable block, a mounting frame and a sliding groove. The two fixing blocks are both fixedly installed on the mounting cover. The movable block is hinged between the two fixing blocks. The mounting frame is connected to the movable block. The sliding groove is opened on the mounting frame. The sliding groove is arranged corresponding to the movable block.

[0010] Preferably, a vertical plate is fixedly installed on the movable block. The vertical plate is in sliding contact with the mounting frame. A hydraulic rod is hinged on the mounting cover. The hydraulic rod is hinged to the vertical plate.

[0011] Preferably, a screw rod is rotatably installed on the mounting frame. The screw rod is threadedly connected to the movable block. A lifting motor is fixedly installed on the mounting frame. The output shaft of the lifting motor is fixedly connected to the screw rod. A connecting block is fixedly installed on the mounting frame for docking with the harvester.

[0012] Compared with the related art, the stalk crushing device for a corn harvester provided by the present utility model has the following beneficial effects:

[0013] Compared with the prior art, the stalk crushing device for a corn harvester provided by this solution combines a crushing shaft driven by a rotating motor and a rotating shaft and a cutting knife driven by a driving mechanism to achieve efficient crushing and cutting of corn stalks, improving the crushing efficiency and uniformity of the stalks. The design of the air jet pipe and the air pump effectively prevents the stalks from winding around the shaft during the crushing and cutting process, and reduces the heat generated by friction by spraying air flow, extending the service life of the equipment. The connecting mechanism realizes precise adjustment of the angle and position of the mounting cover through the cooperation of components such as hydraulic rods and screws to adapt to different models of harvesters and different operation requirements. The transmission mechanism using gears, transmission belts and tensioning wheels ensures the stable and synchronous rotation of the rotating shaft, improving the transmission efficiency and stability. The introduction of the lifting motor makes the adjustment of the connecting mechanism more intelligent and automated, improving work efficiency and reducing operation difficulty and error. The collection device composed of a fan, a connecting pipe and a feed inlet realizes effective collection and transmission of the crushed corn stalks, providing convenience for subsequent processing. The design of the connecting block ensures a stable and reliable connection between the stalk crushing device and the harvester, improving the safety and stability of the overall equipment. Description of the Drawings

[0014] Figure 1 is the front view structural schematic diagram of a stalk crushing device for a corn harvester provided by the present utility model;

[0015] Figure 2 is the front view sectional structural schematic diagram of a stalk crushing device for a corn harvester provided by the present utility model;

[0016] Figure 3 is the side view structural schematic diagram of the connecting pipe of a stalk crushing device for a corn harvester provided by the present utility model.

[0017] Reference Numerals: 1, mounting cover; 2, crushing shaft; 3, rotating motor; 4, rotating shaft; 5, cutting knife; 6, exhaust pipe; 7, air jet pipe; 8, air pump; 9, connecting pipe; 10, gear; 11, transmission belt; 12, tensioning wheel; 13, driving motor; 14, fan; 15, connecting pipe; 16, feed inlet; 17, clamp; 18, fastening bolt; 19, fixed block; 20, movable block; 21, mounting frame; 22, sliding groove; 23, hydraulic rod; 24, screw; 25, lifting motor; 26, connecting block. Detailed Embodiments

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used in the description of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order; the orientation or positional relationship indicated by the terms "inside", "outside", "left", "right" is based on the orientation or positional relationship shown in the drawings and is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on this utility model.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] An embodiment of the present utility model provides a stalk crushing device for a corn harvester, as Figures 1 - 3 shown. The stalk crushing device for a corn harvester includes: a mounting cover 1; a crushing shaft 2 rotatably mounted in the mounting cover 1; a rotating motor 3 fixedly mounted on the mounting cover 1, and the output shaft of the rotating motor 3 is fixedly connected to the crushing shaft 2; two rotating shafts 4, both of the two rotating shafts 4 are rotatably mounted on the mounting cover 1; a cutting knife 5, there are a plurality of the cutting knives 5, and the plurality of cutting knives 5 are respectively sleeved on the two rotating shafts 4; an exhaust pipe 6 fixedly mounted on the mounting cover 1; a plurality of jet pipes 7, the plurality of jet pipes 7 are all fixedly mounted on the exhaust pipe 6, and the plurality of jet pipes 7 are arranged corresponding to the crushing shaft 2 and the two rotating shafts 4; an air pump 8 fixedly mounted on the mounting cover 1; a connecting pipe 9 fixedly mounted on the output end of the air pump 8, and the connecting pipe 9 is fixedly connected to the exhaust pipe 6; a driving mechanism arranged on the mounting cover 1 for driving the rotating shaft 4 and the cutting knife 5 to rotate.

[0021] In this embodiment, the installation cover 1 serves as the housing of the entire stalk crushing device, used to accommodate and protect key components inside, such as the crushing shaft and the rotating shaft. It provides a closed environment to protect the internal components from the external environment and ensure operation safety. The crushing shaft 2 is driven by a rotating motor 3 and rotates inside the installation cover 1. It is the main executing component for stalk crushing. The high-speed rotating crushing shaft 2 can effectively break the stalks into small pieces for subsequent processing. The rotating motor 3 is fixedly installed on the installation cover 1 to provide power for the crushing shaft 2, ensuring the stable and efficient rotation of the crushing shaft 2 and improving the crushing efficiency of the stalks. The rotating shaft 4 is used in cooperation with the cutting knife 5 to enhance the cutting and dispersing effect of the stalks and prevent the stalks from winding. The cutting knife 5 is used to cut the stalks. Through the high-speed rotating cutting knife 5, the stalks can be quickly and effectively cut into small pieces. The exhaust pipe 6 is fixedly installed on the installation cover 1 and is used to convey air flow into the air spraying pipe 7, keeping the inside of the device clean, reducing the temperature, and prolonging the service life of the equipment. The air spraying pipe 7 is correspondingly arranged with the crushing shaft 2 and the two rotating shafts 4 and is used to spray air flow. The sprayed air flow helps prevent the stalks from winding around the crushing shaft and the rotating shaft and reduces the heat generated by friction. The air pump 8 provides air flow for the air spraying pipe 7 to ensure that the air spraying pipe 7 can continuously and stably provide air flow and enhance the dispersing effect of the stalks. The connecting pipe 9 can transfer the air flow generated by the air pump 8 into the exhaust pipe 6. The driving mechanism ensures the stable and efficient operation of the rotating shaft 4 and the cutting knife 5 and improves the cutting and dispersing efficiency of the stalks.

[0022] In a further preferred embodiment of the present utility model, the driving mechanism includes two gears 10, a transmission belt 11, a tensioning wheel 12, and a driving motor 13. The two gears 10 are respectively fixedly installed on the two rotating shafts 4. The transmission belt 11 is sleeved on the two gears 10. The tensioning wheel 12 is rotatably installed on the installation cover 1 and abuts against the transmission belt 11. The driving motor 13 is fixedly installed on the installation cover 1, and the output shaft of the driving motor 13 is fixedly connected to any one of the gears 10.

[0023] In this embodiment, two gears 10 are respectively fixedly installed on two rotating shafts 4, serving as key components of the transmission system. Through the meshing between the gears, it is ensured that the two rotating shafts 4 can rotate synchronously and stably, thereby driving the cutting knife 5 to cut and disperse the stalks. The transmission belt 11 is sleeved on the two gears 10 to form a transmission path. Through the transmission of the transmission belt 11, the power of the driving motor 13 is transmitted to the two gears 10, and then the rotation of the two rotating shafts 4 is driven. The design of the transmission belt makes the transmission smoother, reducing vibration and noise. The tensioning pulley 12 is used to adjust the tension of the transmission belt. By adjusting the position of the tensioning pulley 12, it can be ensured that the transmission belt 11 always maintains an appropriate tension, preventing the transmission belt from loosening or slipping, and ensuring the stability and reliability of the transmission. The driving motor 13 serves as the power source of the entire driving mechanism. The driving motor 13 provides a stable power output to ensure the reliable operation of the gears 10, the transmission belt 11, and the rotating shafts 4. At the same time, by controlling the rotation speed and direction of the driving motor 13, the cutting speed and direction of the stalks can be conveniently adjusted.

[0024] In a further preferred embodiment of the present utility model, a collection device is provided on the mounting cover 1 for collecting the crushed corn stalks. The collection device includes a fan 14, a connecting pipe 15, and a feeding port 16. The fan 14 is fixedly installed on the mounting cover 1. The connecting pipe 15 is fixedly installed inside the mounting cover 1. The connecting pipe 15 is arranged corresponding to the fan 14. The feeding port 16 is opened on the connecting pipe 15.

[0025] In this embodiment, the fan 14 is fixedly installed on the mounting cover 1, serving as the power source of the collection device. By the rotation of the fan 14, wind power is generated to form an air flow, which helps to suck out the crushed corn stalks from the inside of the mounting cover 1 and collect and transport them through the connecting pipe 15. The connecting pipe 15 is fixedly installed inside the mounting cover 1 and is arranged corresponding to the fan 14, and is used to guide and transmit the air flow and the corn stalks. The connecting pipe 15 serves as a channel for the air flow and the corn stalks, guiding the stalk fragments inside the mounting cover 1 to the collection point or subsequent processing equipment, ensuring the effective collection and transportation of the stalks. The feeding port 16 is opened on the connecting pipe 15 and serves as the entrance for the corn stalks to enter the collection device. Through the feeding port 16, the crushed corn stalks can smoothly enter the connecting pipe 15 and are then driven by the air flow generated by the fan 14 to complete the collection and transmission process.

[0026] In a further preferred embodiment of the present utility model, a clamp 17 is sleeved on the connecting pipe 15. A fastening bolt 18 is provided on the clamp 17, and a double-wing nut is threadedly installed on the fastening bolt 18.

[0027] In this embodiment, the clamp 17 is sleeved on the connecting pipe 15 and is used to fix a collection device such as a collection bag to the connecting pipe 15. The clamp 17 has a certain elasticity and can adapt to the sizes of the connecting ends of different collection devices, thereby maintaining its stability. The fastening bolt 18 passes through the clamp 17 and is connected to the corresponding holes on the mounting cover 1 or the connecting pipe 15, and the clamp 17 is fastened by rotating the bolt. The fastening bolt 18 provides a reliable fixing force for the clamp 17, ensuring a tight connection between the clamp 17 and the connecting pipe 15. By adjusting the tightening degree of the bolt, the tightness of the clamp 17 can be flexibly adjusted to adapt to different installation environments and requirements. The double-wing nut is used to prevent the bolt from loosening and falling off. The design of the double-wing nut increases the contact area with the bolt and improves the load-bearing capacity of the bolt. At the same time, its double-wing structure enables the nut to be automatically locked on the bolt after being tightened, effectively preventing the bolt from loosening and falling off. This design not only improves the fixing stability of the connecting pipe 15 but also reduces the maintenance cost and potential safety hazards.

[0028] In a further preferred embodiment of the present utility model, a connecting mechanism is provided on the mounting cover 1 for connecting the mounting cover 1 to the harvester. The connecting mechanism includes two fixing blocks 19, a movable block 20, a mounting frame 21, and a chute 22. The two fixing blocks 19 are both fixedly installed on the mounting cover 1. The movable block 20 is hinged between the two fixing blocks 19. The mounting frame 21 is connected to the movable block 20. The chute 22 is formed on the mounting frame 21 and is correspondingly arranged with the movable block 20.

[0029] In this embodiment, the two fixing blocks 19 are both fixedly installed on the mounting cover 1 and serve as the basic fixed points of the connecting mechanism. The fixing blocks 19 ensure the stability and reliability of the connecting mechanism and provide a firm support for the movable block 20 and the mounting frame 21. The movable block 20 is hinged between the two fixing blocks 19, allowing it to rotate and adjust within a certain range. Through the hinged design of the movable block 20, the angle and position of the mounting cover 1 can be conveniently adjusted to adapt to different models of harvesters or different installation requirements. This flexibility ensures that the stalk crushing device can be connected to the harvester more widely and stably. The mounting frame 21 is connected to the movable block 20 and is used to fix the stalk crushing device to the harvester. The mounting frame 21 serves as a bridge connecting the stalk crushing device and the harvester and bears the main connection force and impact force. Its design should ensure sufficient strength and stability to ensure the safety and stability of the stalk crushing device during the operation of the harvester. The chute 22 allows the mounting frame 21 to slide and adjust within a certain range. The design of the chute 22 further increases the flexibility of the connecting mechanism. By sliding the mounting frame 21, the relative position between the stalk crushing device and the harvester can be finely adjusted to ensure a tight connection and efficient cooperation between the two. This fine-tuning function helps to optimize the stalk crushing effect and improve the working efficiency.

[0030] In a further preferred embodiment of the present utility model, a vertical plate is fixedly installed on the movable block 20. The vertical plate is in sliding contact with the mounting frame 21. A hydraulic rod 23 is hinged on the mounting cover 1, and the hydraulic rod 23 is hinged to the vertical plate.

[0031] In this embodiment, the vertical plate provides a stable support surface for the movable block 20, and through the sliding contact with the mounting frame 21, it ensures the stability and guiding property of the movable block 20 during the adjustment process. This design enables the movable block 20 to move more smoothly between the two fixed blocks 19, thereby facilitating the adjustment of the angle and position of the mounting cover 1. The hydraulic rod 23 serves as a power source, and through its telescopic movement, it drives the vertical plate and the movable block 20 to move. This design makes the adjustment process simpler and faster, and the angle and position of the mounting cover 1 can be precisely controlled as needed. The introduction of the hydraulic rod 23 not only improves the flexibility and precision of the adjustment but also enhances the stability and reliability of the entire connection mechanism.

[0032] In a further preferred embodiment of the present utility model, a screw rod 24 is rotatably installed on the mounting frame 21. The screw rod 24 is threadedly connected to the movable block 20. A lifting motor 25 is fixedly installed on the mounting frame 21, and the output shaft of the lifting motor 25 is fixedly connected to the screw rod 24. A connecting block 26 is fixedly installed on the mounting frame 21 for docking with the harvester.

[0033] In this embodiment, through the threaded connection between the screw rod 24 and the movable block 20, precise control of the movable block 20 can be achieved. When the screw rod 24 rotates, the movable block 20 will perform corresponding lifting or rotational movements according to the direction of the thread and the rotation angle of the screw rod. This design provides a more refined adjustment ability, ensuring a tighter and more stable connection between the mounting cover 1 and the harvester. The lifting motor 25 serves as a power source, and by driving the rotation of the screw rod 24, automatic lifting control of the movable block 20 is realized. This electric adjustment method greatly improves the work efficiency, reduces the operation difficulty, and also reduces the error of manual operation. The introduction of the lifting motor 25 makes the adjustment of the connection mechanism more intelligent and automated. The connecting block 26, as the connection point between the mounting cover 1 and the harvester, should be designed to match the interface of the harvester to provide a stable and reliable connection. The connecting block 26 is usually made of wear-resistant and corrosion-resistant materials to ensure good connection performance during long-term use. At the same time, the connecting block 26 can also be customized according to actual needs to meet the connection requirements of different models of harvesters.

[0034] In summary, compared with the related technologies, the device realizes the efficient crushing and cutting of corn stalks through the combination of the crushing shaft driven by the rotating motor and the rotating shaft and cutting knife driven by the driving mechanism, improving the crushing efficiency and uniformity of the stalks. The design of the air injection pipe and the air pump effectively prevents the stalks from winding around the shaft during the crushing and cutting process, and reduces the heat generated by friction through the sprayed airflow, extending the service life of the equipment. The connecting mechanism realizes the precise adjustment of the angle and position of the installation cover through the cooperation of components such as hydraulic rods and screws to adapt to different models of harvesters and different operation requirements. The transmission mechanism using gears, transmission belts and tensioning wheels ensures the stable and synchronous rotation of the rotating shaft, improving the efficiency and stability of the transmission. The introduction of the lifting motor makes the adjustment of the connecting mechanism more intelligent and automated, improving the working efficiency and reducing the operation difficulty and error. The collection device composed of a fan, a connecting pipe and a feed inlet realizes the effective collection and transmission of the crushed corn stalks, providing convenience for subsequent processing. The design of the connecting block ensures the stable and reliable connection between the stalk crushing device and the harvester, improving the safety and stability of the overall equipment.

[0035] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present invention according to the situation without creative work, so as to obtain different technical solutions that are essentially not divorced from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A stalk crushing device for a corn harvester, characterized in that, Comprising: Installation cover; Crushing shaft, which is rotatably installed in the installation cover; Rotary motor, which is fixedly installed on the installation cover, and the output shaft of the rotary motor is fixedly connected to the crushing shaft; Two rotating shafts, both of which are rotatably installed on the installation cover; Cutting knives, there are multiple cutting knives, and multiple cutting knives are respectively sleeved on the two rotating shafts; Exhaust pipe, which is fixedly installed on the installation cover; Jet pipes, there are multiple jet pipes, and multiple jet pipes are all fixedly installed on the exhaust pipe, and multiple jet pipes are arranged corresponding to the crushing shaft and the two rotating shafts; Air pump, which is fixedly installed on the installation cover; Connecting pipe, which is fixedly installed at the output end of the air pump, and the connecting pipe is fixedly connected to the exhaust pipe; Driving mechanism, which is arranged on the installation cover for driving the rotating shaft and the cutting knife to rotate.

2. The stalk shredding device for a corn harvester according to claim 1, characterized in that, The driving mechanism includes two gears, a transmission belt, a tensioning pulley and a driving motor. Two gears are respectively fixedly installed on the two rotating shafts, the transmission belt is sleeved on the two gears, the tensioning pulley is rotatably installed on the installation cover, the tensioning pulley abuts against the transmission belt, the driving motor is fixedly installed on the installation cover, and the output shaft of the driving motor is fixedly connected to any one of the gears.

3. The stalk crushing device for a corn harvester according to claim 1, characterized in that, A collecting device is arranged on the installation cover for collecting the broken corn stalks. The collecting device includes a fan, a communicating pipe and a feeding port. The fan is fixedly installed on the installation cover, the communicating pipe is fixedly installed in the installation cover, the communicating pipe is arranged corresponding to the fan, and the feeding port is opened on the communicating pipe.

4. The stalk crushing device for a corn harvester according to claim 3, characterized in that, A clamp is sleeved on the communicating pipe, a fastening bolt is arranged on the clamp, and a double-wing nut is threadedly installed on the fastening bolt.

5. The stalk crushing device for a corn harvester according to claim 1, characterized in that, A connecting mechanism is arranged on the installation cover for connecting the installation cover with the harvester. The connecting mechanism includes two fixed blocks, a movable block, a mounting bracket and a sliding groove. Two fixed blocks are both fixedly installed on the installation cover, the movable block is hinged between the two fixed blocks, the mounting bracket is connected to the movable block, the sliding groove is opened on the mounting bracket, and the sliding groove is arranged corresponding to the movable block.

6. The stalk crushing device for a corn harvester according to claim 5, characterized in that, A vertical plate is fixedly installed on the movable block, the vertical plate is in sliding contact with the mounting bracket, a hydraulic rod is hinged on the installation cover, and the hydraulic rod is hinged to the vertical plate.

7. The stalk crushing device for a corn harvester according to claim 6, characterized in that, A screw rod is rotatably installed on the mounting bracket, the screw rod is threadedly connected to the movable block, a lifting motor is fixedly installed on the mounting bracket, the output shaft of the lifting motor is fixedly connected to the screw rod, and a connecting block is fixedly installed on the mounting bracket for docking with the harvester.

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