CN110741800A

CN110741800A - Agricultural grass mower

Info

Publication number: CN110741800A
Application number: CN201911175844.9A
Authority: CN
Inventors: 刘大明; 鲜鹏
Original assignee: Chongqing Hwasdan Machinery Manufacturing Co Ltd
Current assignee: Chongqing Hwasdan Machinery Manufacturing Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-02-04

Abstract

The invention discloses an agricultural grass mower which comprises a travelling mechanism, a driving mechanism, a handle, a transmission mechanism, a grass mowing disc and a grass mowing knife, wherein the driving mechanism is arranged on the travelling mechanism, the handle is arranged on the travelling mechanism or the driving mechanism, the transmission mechanism is connected with the driving mechanism, the transmission mechanism drives the grass mowing knife to rotate in the grass mowing disc, the grass mowing disc is arranged on the transmission mechanism, the agricultural grass mowing machine also comprises a roller adjusting mechanism, the roller adjusting mechanism comprises a roller, a connecting frame, an adjusting plate and a fixing frame, the fixing frame is fixedly arranged on the travelling mechanism, the adjusting plate is arranged on the fixing frame, a positioning hole group is formed in the adjusting plate, the connecting frame is hinged on the fixing frame, the rotatable roller is arranged at the front end of the connecting frame, the roller is positioned in front of the grass mowing disc, a positioning device is arranged at. Through gyro wheel adjustment mechanism, can normal use in the complex environment, its practicality is strong, can be applicable to straw cutting, orchard weeding and waster and useless farmland weeding.

Description

Agricultural grass mower

Technical Field

The invention relates to agricultural machinery, in particular to an agricultural grass trimmer.

Background

A grass trimmer is a commonly used garden machine. At present machine of beating grass commonly used includes the action bars usually, beat the grass head, battery and handle, beat the grass head and set up the front end at the action bars, and the battery provides electric power for beating the grass head, and the handle setting is on the action bars, and the user operates through holding the handle.

However, as the state forbids burning the straws, the straw smashing and returning to the field are encouraged vigorously, so that a grass mower for smashing the straws in the farmland is needed.

With the development of new agriculture, large-area orchards have appeared, weeds are contained in the orchards, farmers cannot use the herbicides to ensure the quality of fruits in the weed removing process, and the soil structure is damaged by weeding to cause partial water and soil loss, so that a grass trimmer is also needed to cut the weeds.

Furthermore, the main labor of the existing rural families is brought into city to deal with farming, so that a large amount of deserted farmlands are caused, weeds in the deserted farmlands are regenerated, and the deserted farmlands are difficult to recover to produce again.

The three situations all need a grass mower, but the grass mower for the existing garden can not crush straws, open the wasteland in the farmland and the like, and the existing garden can not be suitable for agriculture due to the factors of a plurality of straws, uneven ground of the orchard, complex condition of the wasteland and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the agricultural grass mower with strong applicability and good mowing effect.

The purpose of the invention is realized by the following technical scheme: an agricultural grass mower, including running gear, actuating mechanism, the handle, drive mechanism, grass mowing disc and grass cutter, actuating mechanism installs on running gear, the handle is installed on running gear or drive structure, drive mechanism is connected with actuating mechanism, and drive mechanism drive grass cutter is at grass mowing disc internal rotation, grass mowing disc installs on drive mechanism, still include gyro wheel regulation structure, gyro wheel regulation mechanism includes the gyro wheel, the link, regulating plate and mount, mount fixed mounting is on running gear, install the regulating plate on the mount, set a position punch combination has been seted up on the regulating plate, the link articulates on the mount, and the front end of link installs rotatable gyro wheel, the gyro wheel is located grass mowing disc the place ahead, positioner is installed to the rear end of link, and positioner passes through the location punch combination location.

Preferably, the fixing frame comprises two annular supports, the two supports are connected through a first support frame and a second support frame, the front end of the adjusting plate is installed on the first support frame, the rear end of the adjusting plate is installed on the second support frame, only a supporting block is installed on the first support frame, the supporting block, the first support frame and the adjusting plate form a U-shaped groove, and the connecting frame is hinged in the U-shaped groove.

Preferably, the connecting frame includes first connecting rod and the second connecting rod of each other angulation, has seted up the through-hole on the first connecting rod, and rotatable the installing of articulated shaft in the through-hole, the both ends of articulated shaft are installed respectively on the cell wall of U-shaped groove, and the front end of second connecting rod is provided with the goat's horn fork, and the rotatable installation of gyro wheel is in the goat's horn fork.

Preferably, the positioning device comprises a sleeve, a spring, a positioning pin, a rigid bent pipe, a bolt connector and a pull wire, the bolt connector is installed on the rigid bent pipe, the sleeve is fixedly installed at the rear end of the first connecting rod, one end of the sleeve is in threaded connection with the bolt connector, the positioning pin is sleeved at the other end of the sleeve, the spring is further installed in the sleeve between the positioning pin and the bolt connector, one end of the pull wire penetrates through the rigid bent pipe to be connected with the positioning pin, the other end of the pull wire is installed on the handle, and the positioning pin is fixed in the positioning hole group.

Preferably, the positioning hole group comprises a plurality of positioning holes, the positioning holes are located on the same circumference, the circle center of the circumference is located on the axis of the hinge shaft, the positioning pin is provided with a cylindrical portion and a conical portion, the cylindrical portion is sleeved in the sleeve, and the conical portion abuts against the corresponding positioning hole.

Preferably, the transmission mechanism comprises a first main shaft, a transmission belt, a second main shaft, a third main shaft, a bearing seat, a protective cover and a transmission case, the first main shaft is sleeved with a bearing and is positioned in the bearing seat, the power input end of the first main shaft is connected with the power output end of the driving mechanism, the power output end of the first main shaft is provided with a belt pulley, the second main shaft is positioned in the transmission case, the power input end of the second main shaft is also provided with a belt pulley, the transmission belt is wound between the two belt pulleys, the two belt pulleys and the transmission belt are both positioned in the protective cover, the power output end of the second main shaft is provided with a first bevel gear, the power input end of the third main shaft is provided with a second bevel gear meshed with the first bevel gear, the third main shaft is also positioned in the transmission case, the power output end of the third main shaft is provided with a, the grass mowing disc is arranged on the end cover, and the grass cutting knife is positioned in the grass mowing disc.

Preferably, the grass mowing disc comprises a shell, a U-shaped baffle is arranged at the outer edge of the shell, the shell is connected with an end cover through a bolt assembly, a feeding groove is formed in the opening end of the U-shaped baffle, a material discharging notch is formed in the U-shaped baffle, a material blocking plate is installed on the shell and located in the position of the material discharging notch, a material guide plate is installed between the material blocking plate and the U-shaped baffle, a curved grass blocking plate is further installed in the feeding groove, the top of the grass blocking plate is connected with the shell, and two ends of the grass blocking plate are connected with the U-shaped baffle.

Preferably, the height of the grass baffle is smaller than that of the U-shaped baffle, and the shell is provided with a plurality of reinforcing ribs.

Preferably, the grass cutter includes connecting portion, and the both ends of connecting portion all are provided with arc portion and horizontal part, and the horizontal part is connected with arc portion, and the horizontal part is located the outside of arc portion, and the grass face that faces of horizontal part and arc portion is provided with the cutting edge, and the back of the body grass face of horizontal part is provided with leads the slag trap, leads the slag trap and raises along the casing.

The invention has the following advantages:

1. the agricultural grass mower disclosed by the invention can be normally used in a complex environment through the roller adjusting mechanism, has strong practicability, and can be suitable for straw cutting, orchard weeding and weeding of waste farmlands;

2. through grass mowing disc and grass mowing knife, weeds can be cut quickly, and the weeds after cutting can be discharged in a concentrated mode, so that broken grass is prevented from flying and harm to operators caused by the broken grass is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a transmission mechanism, a fixing frame and a roller adjusting mechanism;

FIG. 3 is a first schematic structural diagram of a roller adjustment mechanism;

FIG. 4 is a second schematic structural view of the roller adjustment mechanism;

FIG. 5 is a schematic cross-sectional view of A-A in FIG. 4;

FIG. 6 is a schematic structural view of the transmission mechanism;

FIG. 7 is a schematic cross-sectional view of FIG. 6;

FIG. 8 is a schematic view of the construction of the grass mowing disc;

FIG. 9 is a schematic view of a mowing knife;

in the figure, 1-a walking mechanism, 2-a driving mechanism, 3-a handle, 4-a transmission mechanism, 5-a roller adjusting mechanism, 6-a grass mowing disc, 7-a grass cutter, 8-a fixed frame, 41-a first main shaft, 42-a transmission belt, 43-a second main shaft, 44-a third main shaft, 45-a bearing seat, 46-a protective cover, 47-a transmission box, 48-an end cover, 51-a roller, 52-a connecting frame, 53-an adjusting plate, 54-a first supporting frame, 55-a second supporting frame, 56-a sleeve, 57-a rigid bent pipe, 58-a positioning hole group, 59-a bolt connector, 510-a stay wire, 511-a positioning pin, 512-a supporting block, 521-a first connecting rod and 522-a second connecting rod, 523-claw fork, 61-feed chute, 62-grass baffle, 63-guide plate, 64-guide plate, 65-reinforcing rib, 66-U-shaped baffle, 67-discharge notch, 68-shell, 71-connecting part, 72-arc part, 73-horizontal part, 74-slag guide plate and 75-knife edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention conventionally lay out when in use, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the agricultural grass mower comprises a travelling mechanism 1, a driving mechanism 2, a handle 3, a transmission mechanism 4, a grass mowing disc 6 and a grass mowing knife 7, wherein the driving mechanism 2 is installed on the travelling mechanism 1, the handle 3 is installed on the travelling mechanism 1 or the driving mechanism, the transmission mechanism 4 is connected with the driving mechanism 2, the transmission mechanism 4 drives the grass mowing knife 7 to rotate in the grass mowing disc 6, and the grass mowing disc 6 is installed on the transmission mechanism 4.

In this embodiment, the traveling mechanism 1, the driving mechanism 2 and the handle 3 are all the existing structures, and it is only necessary to use the head of the commonly used agricultural machine, and the commonly used handle 3 has the parts of clutch, brake, etc. in this embodiment, the assembly for adjusting the brake can be applied to the adjusting pull wire 510, that is, the brake wire on the brake assembly is changed to the pull wire 510, so that the adjustment of the pull wire 510 can be realized by holding the handle for adjusting the pull wire 510.

In this embodiment, when the agricultural grass mower is used, the road surface condition is complicated, so the agricultural grass mower further comprises a roller 51 adjusting structure, the roller 51 adjusting mechanism 5 comprises a roller 51, a connecting frame 52, an adjusting plate 53 and a fixing frame 8, the fixing frame 8 is fixedly mounted on the traveling mechanism 1, the adjusting plate 53 is mounted on the fixing frame 8, a positioning hole group 58 is formed on the adjusting plate 53, the connecting frame 52 is hinged on the fixing frame 8, the rotatable roller 51 is mounted at the front end of the connecting frame 52, the roller 51 is positioned in front of the grass mowing disc 6, a positioning device is mounted at the rear end of the connecting frame 52 and positioned through the positioning hole group 58, further, the fixing frame 8 comprises two annular brackets which are connected through a first supporting frame 54 and a second supporting frame 55, the front end of the adjusting plate 53 is mounted on the first supporting frame 54, the rear end of the adjusting plate 53 is mounted on the second supporting frame 55, only the supporting block 512 is further installed on the first supporting frame 54, the supporting block 512, the first supporting frame 54 and the adjusting plate 53 form a U-shaped groove, the connecting frame 52 is hinged in the U-shaped groove, in this embodiment, the connecting frame 52 comprises a first connecting rod 521 and a second connecting rod 522 which form an angle with each other, a through hole is formed in the first connecting rod 521, a hinge shaft is rotatably installed in the through hole, two ends of the hinge shaft are respectively installed on the groove wall of the U-shaped groove, preferably, the hinge shaft is a bolt assembly, a through hole through which a bolt passes is formed in the groove wall of the U-shaped groove, that is, through holes are formed in the supporting block 512 and the adjusting plate 53, the bolt of the bolt assembly sequentially passes through the corresponding through hole and then is locked by a nut, the claw 523 is arranged at the front end of the.

In this embodiment, the positioning device includes a sleeve 56, a spring, a positioning pin 511, a rigid bent tube 57, a bolt connector 59 and a pull wire 510, the bolt connector 59 is mounted on the rigid bent tube 57, the sleeve 56 is fixedly mounted at the rear end of the first link 521, one end of the sleeve 56 is screwed on the bolt connector 59, the other end of the sleeve 56 is sleeved with the positioning pin 511, the spring is further mounted in the sleeve 56 between the positioning pin 511 and the bolt connector 59, one end of the pull wire 510 passes through the rigid bent tube 57 to be connected with the positioning pin 511, the other end of the pull wire 510 is mounted on the handle 3, the positioning pin 511 is fixed in the positioning hole group 58, further, after the positioning pin 511 is fixed, the spring is in a compressed state, so that the positioning pin 511 can abut against the positioning hole group 58 under the action of the spring force, thereby ensuring the stable stability of the connecting frame 52, preferably, the positioning hole group, the locating holes are located on the same circumference, the circle center of the circumference is located on the axis of the hinge shaft, when the connecting frame 52 rotates, the locating pin 511 can be ensured to smoothly enter all the locating holes, further, the locating pin 511 is provided with a cylindrical part and a conical part, the cylindrical part is sleeved in the sleeve 56, the conical part abuts against the corresponding locating hole, the diameter of the small end of the conical part is smaller than that of the locating hole, so that the conical part can smoothly enter the locating hole, and the diameter of the large end of the conical part is larger than that of the locating hole, so that the cylindrical part can be prevented from being ejected out of the sleeve 56 by the spring force of the spring; in the using process, when the roller 51 runs on uneven ground, the handle on the handle 3 can be held, so that the pull wire 510 is pulled, the positioning pin 511 is pulled out of the positioning hole, the machine head can be pressed or lifted according to actual conditions, the connecting frame 52 rotates around the fixing frame 8, the sleeve 56 rotates along with the fixing frame 8, therefore, the positioning pin 511 also rotates, after the position of the roller 51 is adjusted, the handle is released, the positioning pin 511 can be popped out under the action of the spring, along with the landing of the roller 51, the positioning pin 511 can automatically enter the positioning hole close to the positioning pin 511, so that the fixing of the connecting frame 52 is realized, thereby realizing the adjustment of the position of the roller 51, along with the rising and falling of the position of the roller 51, the whole machine head also rotates along with the rotating shaft of the running mechanism 1, therefore, the position of the grass mowing disc 6 is adjusted, the phenomena that the grass mowing disc 6 touches the ground and the grass cutter 7 touches the ground are avoided, and the service life of the grass cutter 7 is guaranteed.

In this embodiment, the transmission mechanism 4 includes a first main shaft 41, a transmission belt 42, a second main shaft 43, a third main shaft 44, a bearing seat 45, a protective cover 46 and a transmission case 47, the first main shaft 41 is sleeved with a bearing, the first main shaft 41 is located in the bearing seat 45, a power input end of the first main shaft 41 is connected with a power output end of the driving mechanism 2, a belt pulley is installed at the power output end of the first main shaft 41, the second main shaft 43 is located in the transmission case 47, a belt pulley is also installed at the power input end of the second main shaft 43, the transmission belt 42 is wound between the two belt pulleys, the two belt pulleys and the transmission belt 42 are both located in the protective cover 46, a first bevel gear is installed at the power output end of the second main shaft 43, a second bevel gear meshed with the first bevel gear is installed at the power input end of the third main shaft 44, the third main shaft 44 is also located in the transmission case 47, and, the power output end of the transmission case 47 is provided with an end cover 48, the grass mowing disc 6 is installed on the end cover 48, the grass cutting blade 7 is located in the grass mowing disc 6, when the grass cutting blade 7 cuts foreign matters, hard objects and winding occurs, the grass cutting blade 7 does not rotate at the moment, and the driving device continuously supplies power at the moment, so the transmission belt 42 slips, and the burning phenomenon caused by the increase of the power of the driving device due to the abnormity of the grass cutting blade 7 is avoided.

In this embodiment, the grass mowing disc 6 comprises a housing 68, a U-shaped baffle 66 is arranged on the outer edge of the housing 68, a plurality of reinforcing ribs 65 are arranged on the housing 68, so as to ensure the structural strength of the housing 68, further, the housing 68 is formed by stamping, the reinforcing ribs 65 form raised strips in the stamping process, the housing 68 is connected with the end cover 48 through bolt assemblies, in this embodiment, the open end of the U-shaped baffle 66 forms a feeding groove 61, a discharging notch 67 is formed on the U-shaped baffle 66, further, the feeding groove 61 is positioned at the front end of the grass mowing disc 6, the discharging notch 67 is positioned at the rear side of the grass mowing disc 6, in this embodiment, the roller 51 and the connecting frame 52 have the function of separating weeds in the traveling process, so that the separated weeds respectively enter from the left end and the right end of the feeding groove 61, and the feeding groove 61 has the function of pressing the weeds downwards, the weeds are bent, finally, the weeds entering the feeding chute 61 are cut under the action of the grass cutter 7 in the process of advancing the grass mowing disc 6, so that crushed grass is formed, further, a baffle plate 64 is arranged on the shell 68, the baffle plate 64 is positioned at the position of the discharge notch 67, a guide plate 63 is arranged between the baffle plate 64 and the U-shaped baffle plate 66, the cut crushed grass is discharged from the discharge notch 67 under the action of the guide plate 63, the baffle plate 64 is arc-shaped, the baffle plate 64 covers the upper end cover 48 of the discharge notch 67, so that the cut crushed grass is directly discharged from the lateral rear side of the U-shaped baffle plate 66 under the action of the baffle plate 64, the baffle plate 64 prevents the crushed grass from flying, the sight of an operator is guaranteed, and the flying crushed grass is prevented from being damaged by the flying crushed grass and discharged from the lateral rear side, also avoided the garrulous grass to pile up on the route that operating personnel walked, guaranteed that the garrulous grass does not cause the injury to operating personnel shank.

In this embodiment, curved fender grass 62 still installs in the feed chute 61, fender grass 62's top is connected with casing 68, fender grass 62's both ends all are connected with U-shaped baffle 66, fender grass 62 highly is less than U-shaped baffle 66's height, fender grass 62 can further press curved weeds, fender grass 62 can also avoid the big weeds after the cutting to throw away from the feed chute 61 direction, and curved fender grass 62 and baffle 66 then form similar volute structure, make garrulous grass remove along volute direction, throw away from row material department at last.

In this embodiment, the grass cutter includes a connecting portion 71, the connecting portion 71 is connected to the power output end of the third main shaft 44, both ends of the connecting portion 71 are provided with an arc-shaped portion 72 and a horizontal portion 73, the horizontal portion 73 is connected to the arc-shaped portion 72, and the horizontal part 73 is positioned at the outer side of the arc-shaped part 72, the grass-facing surfaces of the horizontal part 73 and the arc-shaped part 72 are provided with cutting edges 75, the area between the top of the arc-shaped part 72 and the horizontal part 73 forms a cutting space through the arc-shaped part 72 and the horizontal part 73, weeds can be directly cut into a plurality of segments in the cutting space, and the grass-back surface of the horizontal part 73 is provided with a slag guide plate 74, the slag guide plate 74 is raised along the housing 68, the chopped grass can move the grass-crushing housing 68 through the slag guide plate 74, thereby avoiding the most part of the broken grass to drop, and the broken grass can rotate along with the rotation of the slag guide plate 74 under the action of the slag guide plate 74 and is discharged through the discharging notch 67.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. Agricultural grass mower, including running gear, actuating mechanism, handle, drive mechanism, grass mowing dish and grass cutting knife, actuating mechanism installs running gear is last, the handle is installed running gear or drive are structural, drive mechanism with actuating mechanism connects, just the drive mechanism drive grass cutting knife is in grass mowing dish internal rotation, grass mowing dish installs drive mechanism is last, its characterized in that: still include gyro wheel regulation structure, gyro wheel regulation mechanism includes gyro wheel, link, regulating plate and mount, mount fixed mounting is in running gear is last, install the regulating plate on the mount, location punch combination has been seted up on the regulating plate, the link articulates on the mount, just it is rotatable to install the front end of link the gyro wheel, the gyro wheel is located beat grass dish the place ahead, positioner is installed to the rear end of link, just positioner passes through location punch combination location.

2. An agricultural lawnmower according to claim 1, wherein: the fixing frame comprises two annular supports, the two supports are connected through a first support frame and a second support frame, the front end of the adjusting plate is installed on the first support frame, the rear end of the adjusting plate is installed on the second support frame, only supporting blocks are further installed on the first support frame, the supporting blocks, the first support frame and the adjusting plate form a U-shaped groove, and the connecting frame is hinged in the U-shaped groove.

3. An agricultural lawnmower according to claim 2, wherein: the connecting frame comprises a first connecting rod and a second connecting rod which form an angle with each other, a through hole is formed in the first connecting rod, a hinged shaft is rotatably mounted in the through hole, two ends of the hinged shaft are respectively mounted on the groove wall of the U-shaped groove, a claw fork is arranged at the front end of the second connecting rod, and the roller is rotatably mounted in the claw fork.

4. An agricultural lawnmower according to claim 3, wherein: positioner includes sleeve, spring, locating pin, rigidity return bend, bolted connection head and acting as go-between, bolted connection head installs on the rigidity return bend, sleeve fixed mounting be in the rear end of first connecting rod, just telescopic one end threaded connection is in on the bolted connection head, telescopic other end cover is equipped with the locating pin, the locating pin with still install in the sleeve between the bolted connection head the spring, the one end of acting as go-between pass the rigidity return bend with the locating pin is connected, the other end of acting as go-between is installed on hand, the locating pin is fixed in the positioning hole group.

5. An agricultural lawnmower according to claim 4, wherein: the positioning hole group comprises a plurality of positioning holes, the positioning holes are positioned on the same circumference, the circle center of the circumference is positioned on the axis of the hinge shaft, the positioning pin is provided with a cylindrical part and a conical part, the cylindrical part is sleeved in the sleeve, and the conical part is abutted in the corresponding positioning hole.

6. An agricultural lawnmower according to claim 1 or claim 5, wherein: the transmission mechanism comprises a first main shaft, a transmission belt, a second main shaft, a third main shaft, a bearing seat, a protective cover and a transmission case, wherein the first main shaft is sleeved with a bearing and is positioned in the bearing seat, the power input end of the first main shaft is connected with the power output end of the driving mechanism, the power output end of the first main shaft is provided with a belt pulley, the second main shaft is positioned in the transmission case, the power input end of the second main shaft is also provided with a belt pulley, the transmission belt is wound between the two belt pulleys, the two belt pulleys and the transmission belt are both positioned in the protective cover, the power output end of the second main shaft is provided with a first bevel gear, the power input end of the third main shaft is provided with a second bevel gear meshed with the first bevel gear, and the third main shaft is also positioned in the transmission case, and the power output end of the third main shaft is provided with a mowing knife, the power output end of the transmission case is provided with an end cover, and the mowing disc is arranged on the end cover and enables the mowing knife to be positioned in the mowing disc.

7. An agricultural lawnmower according to claim 6, wherein: the grass mowing disc comprises a shell, wherein a U-shaped baffle is arranged at the outer edge of the shell, the shell is connected with an end cover through a bolt assembly, a feeding groove is formed in the open end of the U-shaped baffle, a material discharging notch is formed in the U-shaped baffle, a material blocking plate is installed on the shell and located in the material discharging notch, a material guide plate is installed between the material blocking plate and the U-shaped baffle, a curved grass blocking plate is further installed in the feeding groove, the top of the grass blocking plate is connected with the shell, and the two ends of the grass blocking plate are connected with the U-shaped baffle.

8. An agricultural lawnmower according to claim 7, wherein: the height of the grass baffle is smaller than that of the U-shaped baffle, and the shell is provided with a plurality of reinforcing ribs.

9. An agricultural lawnmower according to claim 8, wherein: the grass mowing knife comprises a connecting portion, both ends of the connecting portion are provided with an arc-shaped portion and a horizontal portion, the horizontal portion is connected with the arc-shaped portion, the horizontal portion is located on the outer side of the arc-shaped portion, a cutting edge is arranged on the grass facing surface of the arc-shaped portion, a slag guide plate is arranged on the grass facing surface of the horizontal portion, and the slag guide plate is arranged on the shell and is lifted upwards.