Lifting device and harvester

Abstract

The application provides a lifting device and a harvester. The lifting device comprises a driving member, a transmission mechanism and an adjusting assembly. The transmission mechanism is connected with the driving member and converts the rotary motion of the driving member into linear motion. The adjusting assembly comprises an adjusting member, a mounting member and an elastic member. The adjusting member is connected with the transmission mechanism and moves under the drive of the transmission mechanism. The mounting member is movably arranged on the adjusting member. The mounting member has a mounting surface for arranging a cutterhead assembly. The cutterhead assembly is located on the side of the adjusting member away from the mounting member. The elastic member is connected with the side of the mounting member away from the mounting surface. When the adjusting member moves in a first direction, the adjusting member drives the mounting member to move towards the elastic member, so that the elastic member is elastically deformed. When the adjusting member moves in a second direction, the elastic member restores the elastic deformation and drives the mounting member to move towards the second direction and abut against the adjusting member, so that the height of the cutterhead assembly is adjusted. The lifting device of the application can prevent the cutterhead assembly from being damaged when the cutterhead assembly is subjected to external force.

Description

TECHNICAL FIELD

[0001] The present application relates to a harvester, in particular to a lifting device and a harvester. BACKGROUND

[0002] With the increasing types of harvesters, the types of lifting devices in the harvesters are also increasing. The cutterhead assembly is mainly lifted by the lifting device. The existing cutterhead assembly and lifting device are mostly rigidly connected. How to prevent the cutterhead assembly from being damaged by external force becomes a technical problem to be solved. SUMMARY

[0003] The purpose of the present application is to provide a lifting device and a harvester to solve the technical problem of how to prevent the cutterhead assembly from being damaged by external force.

[0004] In a first aspect, the present application provides a lifting device, which comprises:

[0005] a driving member;

[0006] a transmission mechanism connected with the driving member, for converting the rotary motion of the driving member into linear motion;

[0007] an adjusting assembly, which comprises an adjusting member, a mounting member and an elastic member. The adjusting member is connected with the transmission mechanism and is moved under the driving of the transmission mechanism. The mounting member is movably arranged on the adjusting member. The mounting member has a mounting surface, which is used for arranging the cutterhead assembly. When the mounting member is provided with the cutterhead assembly, the cutterhead assembly is located on the side of the adjusting member away from the mounting member. The elastic member is connected to the side of the mounting member away from the mounting surface. When the adjusting member moves in a first direction, the adjusting member drives the mounting member to move towards the elastic member, so that the elastic member is elastically deformed. When the adjusting member moves in a second direction, the elastic member restores the elastic deformation and drives the mounting member to move towards the second direction and abuts against the adjusting member, thereby adjusting the height of the cutterhead assembly. The first direction is opposite to the second direction.

[0008] The mounting member has a mounting groove, and the adjusting member is movably arranged in the mounting groove. When the cutterhead assembly is arranged on the mounting member, the cutterhead assembly protrudes from the side of the mounting member away from the elastic member.

[0009] The lifting device further comprises a guide member, which is sleeved with the mounting member. The guide member extends in the first direction, so that the mounting member moves back and forth in the extension direction of the guide member.

[0010] The lifting device further comprises a base and a limiting piece, the base and the limiting piece are arranged in a spaced manner, and a containing space is enclosed between the base and the limiting piece, the containing space is used for arranging the driving piece, the transmission mechanism, the adjusting assembly and the guide piece, the base is used for mounting the driving piece, the transmission mechanism and the guide piece, the limiting piece is sleeved at one end of the guide piece away from the base, and is connected to one end of the elastic piece away from the mounting piece, and the limiting piece is used for limiting the moving distance of the mounting piece in the first direction.

[0011] The transmission mechanism comprises a first transmission assembly and a second transmission piece, the first transmission assembly is connected with the second transmission piece and the driving piece respectively, and the first transmission assembly drives the second transmission piece to rotate under the driving of the driving piece; the adjusting piece is threadedly connected with the second transmission piece.

[0012] The driving piece is a driving motor, the driving motor comprises a power output shaft, the first transmission assembly comprises a first sub-transmission piece and a second sub-transmission piece which are engaged with each other, the first sub-transmission piece is mounted on the power output shaft, and the second sub-transmission piece is used for mounting the second transmission piece; when the driving motor is turned on, the first sub-transmission piece rotates under the driving of the power output shaft, thereby driving the second sub-transmission piece and the second transmission piece to rotate, and further driving the adjusting piece to move towards or away from the second sub-transmission piece.

[0013] The lifting device further comprises a measuring mechanism, the measuring mechanism is used for measuring the moving distance of the adjusting piece, so as to obtain the height of the mounting piece and the cutter head assembly.

[0014] The measuring mechanism further comprises an encoder and a magnetic body, the magnetic body is arranged on the second transmission piece and rotates with the second transmission piece when the second transmission piece rotates, and the encoder is used for calculating the moving distance of the adjusting piece according to the number of rotations of the magnetic body;

[0015] The lifting device further comprises a controller, the controller is electrically connected with the encoder and the driving piece respectively, and is used for controlling the opening and closing of the encoder and the driving piece.

[0016] A through hole is arranged on the base corresponding to the position of the cutter head assembly, the through hole is used for allowing the cutter head assembly to extend out of one side of the base away from the adjusting piece; the lifting device further comprises a telescopic protective cover, opposite ends of the telescopic protective cover are connected with the adjusting frame and the base respectively, and cover the through hole.

[0017] In a second aspect, the application provides a harvester comprising the lifting device and a cutterhead assembly, the cutterhead assembly being mounted on the adjusting member, and the cutterhead assembly being used for harvesting.

[0018] In the lifting device provided by the application, the transmission mechanism converts the rotary motion of the driving member into linear motion and drives the adjusting member to move, the adjusting member drives the mounting member to move, thereby driving the cutterhead assembly on the mounting surface of the mounting member to move. When the adjusting member moves in the first direction, the adjusting member drives the mounting member to move towards the elastic member, so that the elastic member is elastically deformed; when the adjusting member moves in the second direction, the elastic member restores the elastic deformation and drives the mounting member to move towards the second direction and abut against the adjusting member. When the cutterhead assembly is subjected to an external force, the cutterhead assembly drives the mounting member to move towards the elastic member, the elastic member is elastically deformed to buffer the external force received by the cutterhead assembly, thereby preventing the cutterhead assembly from being damaged when subjected to the external force and improving the service life of the cutterhead assembly. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 is a schematic structural diagram of a harvester provided by an embodiment of the application;

[0021] Figure 2 is a schematic structural diagram of a lifting device and a cutterhead assembly provided by an embodiment of the application;

[0022] Figure 3 is a schematic sectional view of a lifting device and a cutterhead assembly provided by an embodiment of the application;

[0023] Figure 4 is a schematic partial structural view of a lifting device and a cutterhead assembly provided by an embodiment of the application

[0024] Figure 5 is a schematic structural diagram of a cutterhead assembly provided by an embodiment of the application;

[0025] Figure 6 is a schematic structural diagram of an adjusting frame provided by an embodiment of the application;

[0026] Figure 7a is a schematic structural diagram of a mounting member provided by an embodiment of the application Figure 1 ;

[0027] Figure 7bis a structural schematic diagram of a mounting provided by an embodiment of the present application Figure 2 ;

[0028] Figure 8 is a top view schematic diagram of a lifting device provided by an embodiment of the present application

[0029] Figure 9 is a bottom surface structural schematic diagram of a harvester provided by an embodiment of the present application

[0030] Figure 10 is a structural schematic diagram of a cutterhead provided by an embodiment of the present application

[0031] Label explanation: harvester-1000, lifting device-1, base-10, first bearing-11, second bearing-12, driving member-20, power output shaft-201, transmission mechanism-30, first transmission assembly-31, first sub-transmission member-311, second sub-transmission member-312, second transmission member-32, adjusting member-41, first mounting through hole-411, second mounting through hole-412, mounting groove-413, nut-42, adjusting bracket-43, mounting member-44, elastic member-45, measuring mechanism-50, magnetic body-51, encoder-52, guide member-60, limiting member-70, telescopic protective cover-80, sensor-90, cutterhead assembly-2, cutterhead motor-21, cutterhead-22, blade-221, cutterhead support-222. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0033] Reference to "an embodiment" or "the embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a particular embodiment that is preferred over other embodiments. It is explicitly and implicitly understood that the embodiments described herein can be combined with other embodiments.

[0034] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] With the increase of the types of harvesting machines, the types of lifting devices in the harvesting machines are also increasing. The cutterhead assembly is mainly lifted by the lifting device. The existing cutterhead assembly and lifting device are mostly rigidly connected. How to prevent the cutterhead assembly from being damaged by external force becomes a technical problem to be solved.

[0036] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a harvesting machine structure provided by the embodiment of the application (hereinafter, the harvesting machine 1000 mentioned in the application can refer to Figure 1 ), Figure 2 is a schematic diagram of the structure of a lifting device and a cutterhead assembly provided by the embodiment of the application. The harvesting machine 1000 provided by the application comprises the lifting device 1 and the cutterhead assembly 2. The cutterhead assembly 2 is installed on the lifting device 1, and the cutterhead assembly 2 is used for harvesting. Optionally, the cutterhead assembly 2 includes but is not limited to being used for mowing grass. The cutterhead assembly 2 can also be used for harvesting other plants, such as rice, wheat, etc.

[0037] Please refer to Figures 1 to 4 , Figure 3 is a schematic diagram of the cross section of a lifting device and a cutterhead assembly provided by the embodiment of the application, Figure 4 is a schematic diagram of part of the structure of a lifting device and a cutterhead assembly provided by the embodiment of the application. The lifting device 1 comprises a driving member 20, a transmission mechanism 30 connected with the driving member 20, used for converting the rotary motion of the driving member 20 into linear motion, an adjusting assembly comprising an adjusting member 41, a mounting member 44 and an elastic member 45. The adjusting member 41 is connected with the transmission mechanism 30 and is used for moving under the driving of the transmission mechanism 30. The mounting member 44 is movably arranged on the adjusting member 41. The mounting member 44 has a mounting surface used for arranging the cutterhead assembly 2. When the mounting member 44 is arranged with the cutterhead assembly 2, the cutterhead assembly 2 is located on the side of the adjusting member 41 away from the mounting member 44. The elastic member 45 is connected with the side of the mounting member 44 away from the mounting surface. When the adjusting member 41 moves along a first direction (as shown by an arrow A), the adjusting member 41 drives the mounting member 44 to move towards the elastic member 45, so that the elastic member 45 is elastically deformed. When the adjusting member 41 moves along a second direction (as shown by an arrow B), the elastic member 45 restores the elastic deformation and drives the mounting member 44 to move towards the second direction and abuts against the adjusting member 41, thereby achieving the adjustment of the height of the cutterhead assembly 2. The first direction is opposite to the second direction. Figure 3 Figure 3 When the adjusting member 41 moves along a first direction (as shown by an arrow A), the adjusting member 41 drives the mounting member 44 to move towards the elastic member 45, so that the elastic member 45 is elastically deformed. When the adjusting member 41 moves along a second direction (as shown by an arrow B), the elastic member 45 restores the elastic deformation and drives the mounting member 44 to move towards the second direction and abut against the adjusting member 41, thereby achieving the adjustment of the height of the cutterhead assembly 2. The first direction is opposite to the second direction. ​

[0038] The cutter assembly 2 of the lifting device 1 of the present application is mounted on the mounting member 44. When the cutter assembly 2 is subjected to external force (for example, the cutter assembly 2 touches hard objects such as stones during work), the cutter assembly 2 pushes the mounting member 44 to move towards the elastic member 45, and the elastic member 45 is elastically deformed to buffer the external force received by the cutter assembly 2. Until the cutter assembly 2 is not subjected to external force, the elastic member 45 restores the elastic deformation, and the elastic member 45 drives the mounting member 44 and the cutter assembly 2 to move towards the second direction, so that the cutter assembly 2 returns to the initial working position.

[0039] The mounting member 44 is movably arranged on the adjusting member 41, and the mounting member 44 is provided with the elastic member 45. The elastic member 45 can be elastically deformed to offset the external force when the cutter assembly 2 is subjected to external force. Compared with the rigid connection between the cutter assembly and the lifting device in the existing technology, the connection relationship between the lifting device 1 and the cutter assembly 2 in the present application can effectively prevent the cutter assembly 2 from being damaged when subjected to external force, and improve the service life of the cutter assembly 2.

[0040] Please refer to Figure 3 The transmission mechanism 30 includes a first transmission assembly 31 and a second transmission member 32. The first transmission assembly 31 is connected with the second transmission member 32 and the driving member 20 respectively. The first transmission assembly 31 drives the second transmission member 32 to rotate under the driving of the driving member 20. The adjusting member 41 is arranged in spaced relationship with the first transmission assembly 31 and is threadedly connected with the second transmission member 32. The mounting member 44 is used for mounting the cutter assembly 2, and the mounting member 44 abuts against the adjusting member 41. When the second transmission member 32 rotates, the adjusting member 41 moves towards or away from the first transmission assembly 31, thereby driving the mounting member 44 to move, so as to adjust the height of the cutter assembly 2.

[0041] The cutter assembly 2 of the lifting device 1 of the present application is mounted on the mounting member 44, and the mounting member 44 is abutted on the adjusting member 41. When it is needed to adjust the height of the cutter assembly 2 (for example, it is needed to raise or lower the cutter assembly 2, in other words, the cutter assembly 2 is moved towards the first direction or the second direction), only the driving member 20 is started to drive the first transmission assembly 31 to rotate the second transmission member 32, and the second transmission member 32 drives the adjusting member 41 and the mounting member 44 and the cutter assembly 2 mounted on the mounting member 44 to move relative to the first transmission assembly 31, for example, to move towards the first transmission assembly 31 or to move away from the first transmission assembly 31, so as to adjust the relative position relationship between the cutter assembly 2 and the first transmission assembly 31 and the driving member 20, and then the height adjustment of the cutter assembly 2 is realized. Optionally, the rotating direction of the second transmission member 32 can be clockwise rotation or counterclockwise rotation.

[0042] The adjusting member 41 is connected with the second transmission member 32 through threads, the cutter assembly 2 is mounted on the mounting member 44, and the mounting member 44 is abutted on the adjusting member 41. When it is needed to adjust the height of the cutter assembly 2, only the relative position relationship between the adjusting member 41 and the first transmission assembly 31 is adjusted, and then the height adjustment of the cutter assembly 2 is realized. The threads can make the adjusting member 41 move stably when the height is adjusted, so that the cutter assembly 2 can also move stably when the height is adjusted, and then the transmission mode of the lifting device 1 is more stable.

[0043] Optionally, one of the adjusting member 41 and the second transmission member 32 has a threaded groove, the inner wall of the threaded groove has a first thread, the other one of the adjusting member 41 and the second transmission member 32 has a second thread, and the first thread and the second thread are matched with each other to make the adjusting member 41 drive the cutter assembly 2 to move close to or away from the first transmission assembly 31 when the second transmission member 32 rotates relative to the adjusting member 41. Optionally, the first thread is an internal thread, and the second thread is an external thread. Through the thread cooperation between the first thread and the second thread, when the second transmission member 32 rotates, the adjusting member 41 is driven to move along a direction parallel to the rotating shaft of the second transmission member 32.

[0044] In some embodiments, the driving member 20 can be, but is not limited to, a driving motor, which includes a power output shaft 201. When the driving motor is turned on, the power output shaft 201 is driven to rotate, thereby achieving power output. In other embodiments, the driving member 20 can also be a manual driving member. The present application does not make specific limitations in this regard.

[0045] It can be explained that, optionally, when the power output shaft 201 of the driving motor rotates clockwise, the driving motor drives the mounting member 44 to move towards the first transmission assembly 31; when the power output shaft 201 of the driving motor rotates counterclockwise, the driving motor drives the mounting member 44 to move away from the first transmission assembly 31.

[0046] In some embodiments, the first transmission assembly 31 includes a first sub-transmission member 311 and a second sub-transmission member 312 that are engaged with each other. The first sub-transmission member 311 is installed on the power output shaft 201, and the second sub-transmission member 312 is used to install the second transmission member 32. When the driving motor is turned on, the first sub-transmission member 311 is driven to rotate by the power output shaft 201, thereby driving the second sub-transmission member 312 and the second transmission member 32 to rotate, and further driving the mounting member 44 to move towards or away from the second sub-transmission member 312.

[0047] Specifically, the first sub-transmission member 311 is installed on the power output shaft 201. It can be that the first sub-transmission member 311 is sleeved on the power output shaft 201, and the first sub-transmission member 311 is relatively fixed with the power output shaft 201. The power output shaft 201 is used to drive the first sub-transmission member 311 to rotate while rotating.

[0048] It can be explained that the specifications and sizes of the driving motor are relatively large, and the second transmission member 32 is arranged in the vertical direction. If the driving motor is directly connected with the second transmission member 32 and drives the second transmission member 32, the driving member 20 needs to be arranged at the upper end or the lower end of the second transmission member 32, which undoubtedly increases the size of the lifting device 1 in the vertical direction, thereby increasing the size of the harvester 1000. In the lifting device 1 and the harvester 1000 of the present application, the driving member 20 drives the second transmission member 32 to rotate through the first sub-transmission member 311 and the second sub-transmission member 312 in the first transmission assembly 31, and the sizes of the first sub-transmission member 311 and the second sub-transmission member 312 in the vertical direction are small, so the driving member 20 does not need to be arranged at the upper end or the lower end of the second transmission member 32, which reduces the size of the lifting device 1 in the vertical direction, thereby reducing the height and size of the harvester 1000. It is more convenient for the operator to operate and carry the harvester 1000, and the portability and practicality of the harvester 1000 are improved.

[0049] Optionally, the transmission modes of the first sub-transmission member 311 and the second sub-transmission member 312 include but are not limited to gear transmission, worm gear transmission, or other transmission modes, and the first sub-transmission member 311 and the second sub-transmission member 312 include but are not limited to cylindrical gears, bevel gears, non-circular gears, and the like.

[0050] Specifically, in an embodiment, the first sub-transmission member 311 and the second sub-transmission member 312 are gears. The first sub-transmission member 311 is a first gear, which is sleeved on the power output shaft 201, and the second sub-transmission member 312 is a second gear, which is engaged with the first gear. The second transmission member 32 is a lead screw, the second gear is sleeved on the lead screw, and the second gear is fixedly connected with the lead screw. Optionally, the fixed connection mode of the second gear with the lead screw includes but is not limited to threaded connection, buckle connection, riveting, and the like.

[0051] The driving motor drives the first gear to rotate through the power output shaft 201, the first gear drives the second gear to rotate, and the second gear drives the lead screw to rotate.

[0052] In an embodiment, the adjusting member 41 has an internal thread and is sleeved on the lead screw, and is threadedly connected with the lead screw.

[0053] Optionally, in other embodiments, the lead screw can be a sliding lead screw, a rolling lead screw (including a ball screw and a roller screw), a static pressure lead screw, or other types of lead screws.

[0054] When the driving motor is turned on, the first gear is rotated under the driving of the power output shaft 201, thereby driving the second gear and the lead screw to rotate coaxially, and further driving the mounting member 44 and the cutter head assembly 2 to move towards or away from the second gear. The lifting device 1 adopts the combination of gear transmission and lead screw transmission, so that the distance of the cutter head assembly 2 moved in the vertical direction can be controlled, thereby controlling the height of the cutter head assembly 2 in the vertical direction. The transmission structure of the lifting device 1 of the application is more stable, and is not easy to wear and cause the overall structure to loosen, and has a longer service life.

[0055] The second transmission member 32 is a lead screw, when the adjusting member 41 moves to a certain height, according to the self-locking principle of the lead screw, the adjusting member 41 will not fall due to gravity, the mounting member 44 is arranged above the adjusting member 41, so that the cutter head assembly 2 on the mounting member 44 can be fixed at any height.

[0056] Please refer to Figure 3 , the adjusting member 41 comprises an adjusting frame 43 and a nut 42, the nut 42 is mounted on the adjusting frame 43, the mounting member 44 is used for mounting the cutter head assembly 2, and the mounting member 44 is movably arranged on the adjusting frame 43.

[0057] In an embodiment, the elastic member 45 can comprise a connected elastic base and an elastic body, the elastic body is arranged on the elastic base, and the elastic base is arranged on the mounting member 44 and fixedly connected with the mounting member 44.

[0058] Optionally, the elastic member 45 can be but is not limited to a spring, an elastic sleeve (such as a silica gel sleeve, a rubber sleeve, etc.), an elastic block and the like which can be elastically deformed.

[0059] Please refer to Figure 5 、 Figure 6 、 Figure 7a and Figure 7b , Figure 5 is a structural schematic view of a cutter head assembly provided by the embodiment of the application, Figure 6 is a structural schematic view of an adjusting frame provided by the embodiment of the application, Figure 7a is a structural schematic view of a mounting member provided by the embodiment of the application Figure 1 , Figure 7b is a structural schematic view of a mounting member provided by the embodiment of the application Figure 2The adjusting frame 43 is provided with a first mounting through hole 411, and the nut 42 is fixedly installed in the first mounting through hole 411 of the adjusting frame 43. Optionally, the mounting mode of the nut 42 and the adjusting frame 43 includes but is not limited to gluing and the like. In another embodiment, the nut 42 and the adjusting frame 43 can also be integrally formed.

[0060] Please refer to Figure 5 The cutter head assembly 2 includes a cutter head motor 21 and a cutter head 22, and an output shaft of the cutter head motor 21 is connected to the cutter head 22 and drives the cutter head 22 to rotate.

[0061] Please refer to Figure 7a and Figure 7b The mounting piece 44 is provided with at least one mounting groove 413, and the mounting groove 413 is used for mounting and fixing the cutter head assembly 2.

[0062] Specifically, the mounting piece 44, which forms the bottom wall of the mounting groove 413, is provided with a second mounting through hole 412, the output shaft of the cutter head motor 21 extends out through the second mounting through hole 412 and is connected to the cutter head 22 located outside the mounting groove 413, the cutter head motor 21 is fixed on the bottom wall of the mounting groove 413, and the fixed connection mode of the cutter head motor 21 and the mounting piece 44 includes but is not limited to threaded connection, gluing connection and the like.

[0063] In an embodiment, the lifting device 1 is provided with two mounting pieces 44 and two mounting grooves 413, and the two mounting grooves 413 can be used for fixing and driving two cutter head assemblies 2 to lift. The harvesting range of the harvester 1000 can be increased, and the working efficiency of the harvester 1000 can be improved. Optionally, the number of the mounting piece 44 and the mounting groove 413 can also be three, four, five or even more, so as to drive more numbers of the cutter head assembly 2 to lift.

[0064] Please refer to Figure 3 The lifting device 1 further includes a measuring mechanism 50, and the measuring mechanism 50 is used for measuring the moving distance of the adjusting piece 41 and the mounting piece 44, so as to obtain the height of the cutter head assembly 2.

[0065] Specifically, in an embodiment, the lifting device 1 further includes a sensor 90, and the sensor 90 is fixedly arranged in the harvester 1000.

[0066] The harvesting machine 1000 starts working, the driving member 20 drives the adjusting member 41 to drive the mounting member 44 to move away from the first transmission assembly 31 to the corresponding position of the sensor 90, including but not limited to the position of the adjusting member 41 contacting the sensor 90 or the position of the sensor 90 sensing the adjusting member 41.

[0067] The height of the cutter head assembly 2 when the adjusting member 41 moves to the corresponding position of the sensor 90 is the first height. When the adjusting member 41 and the mounting member 44 drive the cutter head assembly 2 to move close to or away from the first transmission assembly 31, the measuring mechanism 50 measures the distance of the movement of the adjusting member 41 and determines that the distance of the movement of the adjusting member 41 is the first distance. The cutter head assembly 2 is fixed on the mounting member 44, and the mounting member 44 always abuts against the adjusting member 41, so the distance of the movement of the cutter head assembly 2 is also the first distance. The height of the cutter head assembly 2 after following the movement of the mounting member 44 is the second height, and the second height can be calculated from the first height and the first distance. For example, the second height can be obtained by subtracting the first distance from the first height.

[0068] Optionally, the sensor 90 includes but is not limited to a contact sensor, an infrared sensor, a photoelectric sensor or other types of sensors.

[0069] Please refer to Figure 2 and Figure 3 In the lifting device 1 provided by the present application, the transmission mechanism 30 includes the first transmission assembly 31 and the second transmission member 32. The first transmission assembly 31 drives the second transmission member 32 to rotate under the drive of the driving member 20. The adjusting member 41 and the mounting member 44 are threadedly connected with the second transmission member 32 and drive the cutter head assembly 2 to move towards or away from the first transmission assembly 31 when the second transmission member 32 rotates. The measuring mechanism 50 is used to measure the distance of the movement of the adjusting member 41, so as to obtain the height of the cutter head assembly 2. The lifting device 1 of the present application can accurately determine the height of the cutter head assembly 2.

[0070] Compared with the lifting devices of other existing harvesting machines, the transmission mode of the lifting device 1 of the present application is more stable, and the measuring mechanism 50 can calculate the specific height of the cutter head assembly 2. It is more convenient for the operator to accurately adjust and control the height of the cutter head assembly 2, so as to facilitate the harvesting machine 1000 to trim the grass or other plants to a specific height, and improve the diversity of the working function of the harvesting machine 1000.

[0071] Please refer to Figure 3The measuring mechanism 50 comprises a magnetic body 51, which can be a radial magnet or other magnetic material. The magnetic body 51 is arranged on the second transmission member 32 and fixedly connected with the second transmission member 32, and rotates with the second transmission member 32. The magnetic body 51 can be coaxially arranged with the second transmission member 32, or arranged at the top or bottom end of the second transmission member 32.

[0072] Referring again to Figure 3 The measuring mechanism 50 further comprises an encoder 52, which is arranged apart from the magnetic body 51. In an embodiment, the distance between the encoder 52 and the magnetic body 51 is 2 mm. The distance between the encoder 52 and the magnetic body 51 can be 0-10 mm, such as 1 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0073] The encoder 52 is used to calculate the distance moved by the adjusting member 41 and the mounting member 44 according to the number of rotations of the magnetic body 51. The encoder 52 can be coaxially arranged with the second transmission member 32 or the magnetic body 51.

[0074] Specifically, the encoder 52 comprises a detection chip, which is used to detect the change of magnetic field. When the magnetic body 51 is a radial magnet, the magnetic body 51 comprises a first end and a second end arranged oppositely, the first end is N-pole, and the second end is S-pole. The magnetic field near the first end is N-pole magnetic field, and the magnetic field near the second end is S-pole magnetic field. When the magnetic body 51 rotates with the second transmission member 32, the first end and the second end also rotate, so that the magnetic field near the magnetic body 51 changes.

[0075] The detection chip is used to detect the change of magnetic field caused by the rotation of the magnetic body 51, and the number of rotations of the second transmission member 32 is calculated and determined according to the number of changes of magnetic field. Since the adjusting member 41 is threadedly connected with the second transmission member 32, the second transmission member 32 rotates to drive the adjusting member 41 to move close to or away from the first transmission member. The encoder 52 calculates and determines the distance moved by the adjusting member 41 and the mounting member 44 according to the number of rotations of the second transmission member 32, so as to determine the distance moved by the cutterhead assembly 2.

[0076] The measuring mechanism 50 has the encoder 52 and the magnetic body 51 connected with the second transmission member 32, the encoder 52 can determine the rotation number of the magnetic body 51 and the rotation number of the second transmission member 32, and further determine the moving distance of the cutterhead assembly 2. The moving distance of the mounting member 44 and the cutterhead assembly 2 can be accurately calculated, so as to obtain the height information of the cutterhead assembly 2, and facilitate the harvester 1000 to accurately control the height of the cutterhead assembly 2.

[0077] The lifting device 1 further comprises a controller (not shown) electrically connected with the encoder 52 and the driving member 20 respectively, for controlling the opening and closing of the encoder 52 and the driving member 20.

[0078] Specifically, after the operator inputs the preset height that the cutterhead assembly 2 needs to reach into the harvester 1000, the controller controls the driving member 20 to rotate, so as to drive the adjusting member 41 and the mounting member 44 to move towards or away from the first transmission assembly 31. When the adjusting member 41 moves to the position corresponding to the sensor 90, the controller controls the driving member 20 to stop working, so as to control the adjusting member 41 to stop moving. The controller compares the input preset height with the first height of the cutterhead assembly 2, and controls the driving member 20 to drive the adjusting member 41 to move towards or away from the first transmission assembly 31, so as to drive the cutterhead assembly 2 to move towards or away from the first transmission assembly 31. The second distance moved by the cutterhead assembly 2 is determined by the measuring mechanism 50, and the controller controls the driving member 20 to stop working when the second distance is equal to the difference between the preset height and the first height,

[0079] For example, in an embodiment, when the sensor 90 is located at one end of the second transmission member 32 away from the first transmission assembly 31, the controller controls the driving member 20 to drive the adjusting member 41 to move away from the first transmission assembly 31. After the adjusting member 41 moves to the position corresponding to the sensor 90, the height of the cutterhead assembly 2 is the first height. After the controller identifies that the preset height is less than the first height, the controller controls the driving member 20 to drive the adjusting member 41 to move towards the first transmission assembly 31, so as to drive the cutterhead assembly 2 to move towards the first transmission assembly 31. The second distance moved by the cutterhead assembly 2 is determined by the measuring mechanism 50, and the controller controls the driving member 20 to stop working when the second distance is equal to the difference between the preset height and the first height.

[0080] The controller is used to control the opening and closing of the encoder 52 and the driving member 20, thereby controlling the height of the mounting member 44 and the cutterhead assembly 2, providing a basis and premise for the control of the harvester 1000 for the height of the cutterhead assembly 2.

[0081] Please refer again to Figure 2 and Figure 8 , Figure 8 is a top view schematic diagram of a lifting device provided by the embodiments of the present application. The lifting device 1 further comprises guide members 60. The guide members 60 are arranged along a first direction (vertical direction), and at least part of the guide members 60 movably sheath the adjusting member 41 or the mounting member 44, for moving the adjusting member 41 or the mounting member 44 in the extension direction of the guide members 60.

[0082] In an embodiment, the number of the guide members 60 is 6. Alternatively, the number of the guide members 60 can also be 1, 2, 4, 8, etc.

[0083] The mounting member 44 is respectively sheathed on the plurality of guide members 60, so as to prevent the mounting member 44 from rotating relative to the guide members 60. It should be noted that the adjusting member 41 is respectively sheathed on the plurality of guide members 60, so as to ensure that the adjusting member 41 is lifted in the extension direction of the guide members 60. In an embodiment, each of the mounting members 44 is respectively sheathed with two guide members 60, and the adjusting member 41 is sheathed with two guide members 60.

[0084] Specifically, when the cutterhead assembly 2 encounters a hard object such as a stone in the working state of the harvester 1000, the harvester 1000 will be subjected to an external force, and a first force is provided to the mounting member 44. The guide members 60 can be used to abut against the mounting member 44 and provide a second force to prevent the mounting member 44 from being displaced when subjected to the first force. When the harvester 1000 is in the working state, the guide members 60 can avoid the displacement of the parts inside the harvester 1000 caused by the external force on the cutterhead assembly 2, thereby improving the stability of the internal structure of the harvester 1000.

[0085] Please refer again to Figure 2 and Figure 8The lifting device 1 further comprises a base 10 and a limiting piece 70, the base 10 and the limiting piece 70 are arranged in a spaced manner, and a containing space is enclosed between the base 10 and the limiting piece 70, the containing space is used for arranging the driving piece 20, the transmission mechanism 30, the adjusting assembly and the guide piece 60, the base 10 is used for mounting the driving piece 20, the transmission mechanism 30 and the guide piece 60, the limiting piece 70 is sleeved on one end of the guide piece 60 away from the base 10, and is connected to one end of the elastic piece 45 away from the mounting piece 44, and the limiting piece 70 is used for limiting the moving distance of the adjusting piece 41 and the mounting piece 44 in the first direction.

[0086] A through hole is arranged on the base 10 corresponding to the position of the cutter head assembly 2, and the through hole is used for allowing the cutter head assembly 2 to extend out of one side of the base 10 away from the mounting piece 44. Specifically, the through hole is used for allowing the mounting piece 44 to extend out of one side of the base 10 away from the elastic piece 45, and the mounting piece 44 is used for driving the cutter head 22 and at least part of the cutter head motor 21 to extend out of one side of the base 10 away from the mounting piece 44.

[0087] Both ends of the guide piece 60 are fixedly connected to the base 10 and the limiting piece 70, and the fixed connection manner of the guide piece 60 to the base 10 and the limiting piece 70 includes but is not limited to threaded connection.

[0088] In an embodiment, the sensor 90 is fixed to the limiting piece 70.

[0089] Please refer again to Figure 3 The lifting device 1 further comprises a first bearing 11 and a second bearing 12, the first bearing 11 is mounted on the base 10, the second bearing 12 is arranged on the limiting piece 70, and opposite ends of the second transmission piece 32 are respectively inserted into the first bearing 11 and the second bearing 12 and can rotate relative to the first bearing 11 and the second bearing 12.

[0090] After the first bearing 11 and the second bearing 12 are connected to the second transmission piece 32, the friction of the second transmission piece 32 rotating in the first bearing 11 and the second bearing 12 is smaller, so that the rotation of the second transmission piece 32 is more smooth, which is beneficial to the normal operation of the lifting device 1.

[0091] Please refer again to Figure 2The lifting device 1 further comprises a telescopic protective cover 80, two opposite ends of the telescopic protective cover 80 are connected to the mounting member 44 and the base 10 respectively, and the telescopic protective cover 80 covers the through hole. In other words, the telescopic protective cover 80 is arranged corresponding to the position of the through hole, in other words, the normal projection of the telescopic protective cover 80 on the base 10 covers the through hole.

[0092] Two ends of the telescopic protective cover 80 are fixed on the bottom end of the mounting member 44 and the base 10 respectively, and can move with the mounting member 44 and the cutterhead assembly 2 and can be telescoped, so as to play a role of dustproof and waterproof inside the harvester 1000.

[0093] Please refer to Figure 2 , Figure 9 and Figure 10 , Figure 9 is a bottom surface structure schematic diagram of a harvester provided by the embodiment of the present application, Figure 10 is a structure schematic diagram of a cutterhead provided by the embodiment of the present application. The cutterhead 22 further comprises at least one blade 221 and a cutterhead support 222, and the blade 221 is arranged on the outer periphery of the side of the cutterhead support 222 away from the mounting member 44, and at least partially exposes the outer periphery of the cutterhead support 222.

[0094] The blade 221 is rotationally connected to the cutterhead support 222, and when the cutterhead support 222 rotates, the blade 221 is arranged radially under the action of centrifugal force. When the blade 221 touches a hard external object such as a stone during work, because the blade 221 is rotationally connected to the cutterhead support 222, the blade 221 can rotate to prevent the blade 221 from being damaged.

[0095] The above is part of the embodiments of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements also regarded as the protection scope of the present application.

Claims

1. A lifting device, characterized in that, The lifting device includes: Drive components; A transmission mechanism, connected to the driving member, for converting the rotational motion of the driving member into linear motion; and An adjustment assembly includes an adjusting member, a mounting member, and an elastic member. The adjusting member is connected to the transmission mechanism and is moved under the drive of the transmission mechanism. The mounting member is movably disposed on the adjusting member and has a mounting surface for mounting a cutter head assembly. When the cutter head assembly is mounted on the mounting member, the cutter head assembly is located on the side of the mounting member away from the adjusting member. The elastic member is connected to the side of the mounting member away from the mounting surface. When the adjusting member moves along a first direction, the adjusting member drives the mounting member to move towards the elastic member, causing the elastic member to undergo elastic deformation. When the adjusting member moves along a second direction, the elastic member restores its elastic deformation, driving the mounting member to move towards the second direction and abut against the adjusting member, thereby achieving adjustment of the height of the cutter head assembly. The first direction is opposite to the second direction.

2. The lifting device according to claim 1, characterized in that, The mounting member has a mounting groove, and the adjusting member is movably inserted through the mounting member so that when the cutter head assembly is installed on the mounting member, the cutter head assembly protrudes from the side of the mounting member away from the elastic member.

3. The lifting device according to claim 1, characterized in that, The lifting device further includes a guide member, on which the mounting member is sleeved. The guide member extends along the first direction to allow the mounting member to move back and forth in the direction of extension of the guide member.

4. The lifting device according to claim 3, characterized in that, The lifting device further includes a base and a limiting member. The base and the limiting member are spaced apart and form an accommodating space. The accommodating space is used to house the driving member, the transmission mechanism, the adjusting component, and the guide member. The base is used to install the driving member, the transmission mechanism, and the guide member. The limiting member is sleeved on the end of the guide member away from the base and connected to the end of the elastic member away from the mounting member. The limiting member is used to limit the distance the mounting member moves in the first direction.

5. The lifting device according to claim 1, characterized in that, The transmission mechanism includes a first transmission component and a second transmission member. The first transmission component is connected to the second transmission member and the driving member respectively. Under the drive of the driving member, the first transmission component drives the second transmission member to rotate. The adjusting member is threadedly connected to the second transmission member.

6. The lifting device according to claim 5, characterized in that, The driving component is a drive motor, which includes a power output shaft. The first transmission assembly includes a first sub-transmission component and a second sub-transmission component that mesh with each other. The first sub-transmission component is mounted on the power output shaft, and the second sub-transmission component is used to mount the second transmission component. When the drive motor is turned on, the first sub-transmission component rotates under the drive of the power output shaft, thereby driving the second sub-transmission component and the second transmission component to rotate, and then driving the adjusting component to move toward or away from the second sub-transmission component.

7. The lifting device according to claim 1, characterized in that, The lifting device also includes a measuring mechanism for measuring the distance the adjusting member moves, thereby obtaining the height of the mounting member and the cutter head assembly.

8. The lifting device according to claim 7, characterized in that, The measuring mechanism also includes an encoder and a magnetic body. The magnetic body is mounted on the second transmission member and rotates together with the second transmission member when the second transmission member rotates. The encoder is used to calculate the distance the adjusting member moves based on the number of rotations of the magnetic body. The lifting device also includes a controller, which is electrically connected to the encoder and the drive component respectively, and is used to control the opening and closing of the encoder and the drive component.

9. The lifting device according to claim 4, characterized in that, The base has a through hole corresponding to the position of the cutter head assembly. The through hole allows the cutter head assembly to extend out of the base to the side away from the adjusting member. The lifting device also includes a telescopic protective cover. The opposite ends of the telescopic protective cover are respectively connected to the mounting member and the base, and cover the through hole.

10. A harvester, characterized in that, include: The lifting device according to any one of claims 1-9; as well as A cutter head assembly, which is mounted on the adjusting member, is used for harvesting.

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