Mower grass-chopping mechanism

Abstract

The present utility model relates to the technical field of mowers, and specifically to a mower grass-chopping mechanism, comprising a mowing main unit, a mowing assembly, and a driving device mounted on the mowing main unit, wherein the mowing assembly is mounted at the bottom of the driving device, the mowing assembly comprises a cutter disc, a fan blade, and a cutter disc protection cover, the fan blade being arranged between the cutter disc and the cutter disc protection cover, and the cutter disc being provided with upper and lower layers of cutter blades for cutting grass; the driving device is used for driving the mowing assembly to cut grass; and a height adjusting mechanism for adjusting the height of the cutter disc is further provided on the cutter disc protection cover. The mower grass-chopping mechanism of the present utility model solves the technical problem of the necessity for manual secondary collection and cleaning due to a single layer of cutter blades having a poor mowing effect, leaving floating grass on the surface of a lawn or making the lawn uneven.

Description

A grass-chopping mechanism for a lawn mower Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a grass chopping mechanism of a lawn mower. Background Art

[0002] A lawn mower, also known as a weed cutter, lawn mower, or lawn trimmer, is a mechanical tool used to trim lawns and vegetation. It consists of a cutter disc, an engine, running wheels, a running mechanism, and blades. The cutter disc is mounted on the running wheels, the engine is mounted on the cutter disc, and the blades are mounted on the engine's output shaft. The blades utilize the high-speed rotation of the engine to significantly increase their speed, saving workers time and reducing a large amount of manpower.

[0003] However, the existing lawn mowers use single-layer blades for mowing, which only realizes the mowing function but not the grass chopping function. In addition, after mowing, the grass section is long, resulting in floating grass on the surface or uneven lawn, which requires secondary recycling and cleaning, which wastes manpower and is not environmentally friendly.

[0004] Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a grass chopping mechanism for a lawn mower, which solves the technical problem that single-layer blades have poor mowing effect, resulting in floating grass on the surface or uneven lawn, requiring manual secondary recovery and cleaning.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A lawn mower grass cutting mechanism includes a main mower body, a mowing assembly, and a driving device installed on the main mower body, the mowing assembly is installed at the bottom of the driving device, the mowing assembly includes a cutter disc, fan blades, and a cutter disc protective cover, the fan blades are arranged between the cutter disc and the cutter disc protective cover, the cutter disc is provided with upper and lower layers of blades for mowing grass, the driving device is used to drive the mowing assembly to cut grass, and the cutter disc protective cover is also provided with a height adjustment mechanism for adjusting the cutter disc height.

[0008] In the above structure, a plurality of evenly arranged baffles are provided on the side of the blade disc protective cover close to the forward direction, which are used to avoid hard objects when moving forward. A plurality of spaced-apart baffles are provided on the side of the blade disc protective cover away from the forward direction, which are used to comb the grass clumps fallen on the lawn. Ventilation holes are provided above the baffles for ventilation and blocking longer grass sections.

[0009] In the above structure, the driving device is a driving motor, and a cutter disc mounting seat is connected to the output shaft end of the driving motor. The fan blade is mounted on the cutter disc mounting seat and locked by screws, and the cutter disc is installed at the bottom of the cutter disc mounting seat and fixed by screws.

[0010] In the above structure, a first through hole is provided at the center of the cutter disc protective cover, and the cutter disc protective cover is sleeved on the head of the drive motor. The diameter of the first through hole is larger than the outer diameter of the head of the drive motor. The output shaft of the drive motor passes through the cutter disc protective cover, the fan blades and the cutter disc in sequence from top to bottom. The rotation of the output shaft of the drive motor drives the rotation of the fan blades and the cutter disc.

[0011] In the above structure, a guide block is provided on the main mower body, and the guide block is connected to the head of the drive motor through a connecting rod. One end of the connecting rod is rotatably connected to the head of the drive motor through a bearing, and the other end of the connecting rod is rotatably connected to the guide block through a bearing.

[0012] In the above structure, the guide block is provided with a spring for reducing the gravity of the mowing assembly.

[0013] In the above structure, the bottom of the cutter disc is provided with multiple evenly arranged blades, and the top of the cutter disc is provided with multiple blades corresponding to the blades at the bottom of the cutter disc, and the blades at the bottom of the cutter disc and the blades at the top of the cutter disc are connected by bolts.

[0014] In the above structure, two cutter disc protection strips are further provided at the bottom of the cutter disc protection cover. The cutter disc protection strips are provided with a plurality of through holes, and the through holes are used for grass cutting and air convection to prevent grass from being trapped or blocked.

[0015] In the above structure, the height adjustment mechanism includes a lifting motor, a support plate, a screw rod and a support plate. The lifting motor is installed above the support plate. The output shaft of the lifting motor is connected to the screw rod and drives the screw rod to rotate. A screw rod nut is sleeved on the screw rod. The rotation of the screw rod drives the screw rod nut to move up and down. Parallel pull rods are provided on both sides of the screw rod. One end of the pull rod is fixed to the support plate, and the other end of the pull rod is fixed to the support plate.

[0016] In the above structure, the main mower includes a frame, a front-drive wheel group, a rear-drive wheel group and a first motor. The front-drive wheel group includes two orthogonal wheels, and the rear-drive wheel group includes two hub motor drive wheels. The first motor is installed on the rear-drive wheel group to drive the rotation of the hub motor drive wheel.

[0017] The beneficial effects of the utility model are as follows: providing a grass-chopping mechanism of a lawn mower, which cuts the grass into multiple sections by arranging a double-layer blade, and through the fan blades and the blade protection cover arranged above the cutter disc, the cut grass sections stay in the cavity of the blade protection cover for a while with the help of wind force, and the upper blade of the cutter disc cuts the grass sections twice or multiple times, achieving the effect of crushing the grass, so that after the grass is discharged, there is no floating grass or unevenness on the surface of the lawn, reducing the problem of manual secondary recovery and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 is a cross-sectional view of the structure of the present invention;

[0020] FIG2 is a schematic structural diagram of the connection between the drive device and the mowing assembly of the utility model;

[0021] Figure 3 is a schematic structural diagram of the mowing assembly of the present invention;

[0022] FIG4 is a perspective view of the structure of the connection between the drive device and the mowing assembly of the utility model;

[0023] Figure 5 is a schematic structural diagram of the cutter head of the present invention;

[0024] Figure 6 is a schematic structural diagram of the connection between the drive device and the height adjustment mechanism of the utility model;

[0025] FIG7 is a schematic structural diagram of the present utility model.

[0026] Among them: 1-mowing mainframe, 2-mowing assembly, 3-cutter, 4-fan, 5-cutter protection cover, 6-blade, 7-bolt, 8-drive motor, 9-cutter protection strip, 11-guide block, 12-connecting rod, 13-spring, 14-frame, 15-front drive wheel group, 16-rear drive wheel group, 14-first motor, 111-lifting motor, 112-support plate, 113-screw, 114-support plate, 115-pull rod, 51-baffle, 52-bar, 53-vent, 81-cutter mounting seat, 82-screw, 83-screw, 91-through hole. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0028] A lawn mower grass cutting mechanism, as shown in the figure, includes a mowing main body 1, a mowing component 2 and a driving device installed on the mowing main body 1, the mowing component 2 is installed at the bottom of the driving device, the mowing component 2 includes a cutter disc 3, a fan blade 4 and a cutter disc protective cover 5, the fan blade 4 is arranged between the cutter disc 3 and the cutter disc protective cover 5, in this embodiment, the fan blade is a double-leaf blade or a three-leaf blade; the cutter disc 3 is provided with an upper and lower layer of blades 6 for mowing grass, in this embodiment, the blade 6 is a fling blade, and by loosely setting the blade 6, it is avoided that when hard objects enter the cutter disc protective cover 5, the blade 6 is directly hit, resulting in wear of the blade 6, affecting the service life and working efficiency of the blade; in the above structure, the bottom of the cutter disc 3 is provided with a plurality of evenly arranged blades 6, and the top of the cutter disc 3 is provided with a plurality of blades 6 corresponding to the blades at the bottom of the cutter disc 3, and the blades 6 at the bottom of the cutter disc 3 and the blades 6 at the top of the cutter disc 3 are connected by bolts 7. In this embodiment, three blades 6 are provided on the top and bottom of the cutter disc 3. The drive device is used to drive the mowing assembly 2 to cut the grass. In the above structure, the drive device is a drive motor 8. The output shaft of the drive motor 8 is connected to a cutterhead mounting seat 81. The blades 4 are mounted on the cutterhead mounting seat 81 and locked by screws 82. The cutterhead 3 is mounted on the bottom of the cutterhead mounting seat 81 and secured by screws 83. In the above structure, the cutterhead protective cover 5 has a first through-hole at its center. The cutterhead protective cover 5 is mounted on the head of the drive motor 8. The diameter of the first through-hole is larger than the outer diameter of the head of the drive motor 8. The output shaft of the drive motor 8 passes through the cutterhead protective cover 5, the blades 4, and the cutterhead 3 from top to bottom. The rotation of the output shaft of the drive motor 8 drives the blades 4 and the cutterhead 3 to rotate, thereby cutting the grass. In the above structure, two cutterhead protection strips 9 are also provided at the bottom of the cutterhead protective cover 5. Each of the blades 4 is provided with a plurality of through-holes 91. The through-holes 1 are used for grass cutting and air convection to prevent grass entrapment and blockage.

[0029] In the above structure, a plurality of evenly arranged baffles 51 are provided on the side of the blade protection cover 5 close to the forward direction, which are used to avoid hard objects when moving forward. A plurality of spaced baffles 52 are provided on the side of the blade protection cover 5 away from the forward direction. The baffles 52 can be used to block longer grass sections and can also be used as comb teeth to comb grass clumps that fall on the lawn, so that they settle on the soil and become fertilizer, thereby ensuring the cleanliness of the lawn surface and reducing secondary cleaning and manpower. A vent 53 is provided above the baffle 52. The vents 53 are used to block long grass sections and keep them in the cavity of the cutter disc protective cover 5 for a while, and the rotation of the cutter disc repeatedly cuts the grass; when the lawn mower is working, if it encounters hard objects such as stones or water pipes, it can bypass or go over the hard objects to prevent the hard objects from entering the cutter disc protective cover 5 and damaging the blades 6 under the high-speed rotation of the cutter disc 3, thereby increasing the service life of the blades 6; when the grass clippings are discharged, the tail end of the cutter disc protective cover 5 can effectively comb the discharged grass clippings, avoiding the accumulation of grass and the need for manual secondary cleaning, which is environmentally friendly and reduces human resources.

[0030] In the above structure, a guide block 11 is provided on the main mower 1, and the guide block 11 is connected to the head of the drive motor 8 through a connecting rod 12. One end of the connecting rod 12 is rotatably connected to the head of the drive motor 8 through a bearing, and the other end of the connecting rod 12 is rotatably connected to the guide block 11 through a bearing. In this embodiment, the connecting rod is a double connecting rod; in the above structure, a spring 13 for reducing the gravity of the mowing assembly is provided on the guide block 11. The blade protection cover 5 is also provided with a height adjustment mechanism for adjusting the blade height. In this embodiment, the height adjustment mechanism automatically adjusts the mowing height according to the seasonal recommended mowing suggestions to achieve healthy lawn maintenance; in the above structure, the height adjustment mechanism includes a lifting motor 111, a support plate 112, a screw rod 113 and a support plate 114. The lifting motor 111 is installed above the support plate 112. The output shaft of the lifting motor 111 is connected to the screw rod 113 and drives the screw rod 113 to rotate. A screw nut is sleeved on the screw rod 113. The rotation of the screw rod 113 drives the screw nut to move up and down. Parallel pull rods 115 are provided on both sides of the screw rod 113. One end of the pull rod 115 is fixed on the support plate 112, and the other end of the pull rod 115 is fixed on the support plate 114.

[0031] In the above structure, the main mower 1 includes a frame 14, a front-drive wheel group 15, a rear-drive wheel group 16 and a first motor 17. The front-drive wheel group 15 includes two orthogonal wheels, and the rear-drive wheel group 16 includes two hub motor drive wheels. The first motor 17 is installed on the rear-drive wheel group 16 to drive the rotation of the hub motor drive wheel. In this embodiment, the orthogonal wheel is a 30° inclined orthogonal wheel with a climbing angle of 40°. The narrow tread does little damage to the grass, the large wheel diameter has strong off-road capability, and the oblique arrangement is conducive to self-rotation on uneven ground; the hub motor drive wheel runs smoothly and has strong horsepower.

[0032] Working principle:

[0033] During operation, the drive motor is started through the cutter disc with double blades, and under the joint action of the set fan blades and the cutter disc protective cover, the output shaft of the drive motor rotates to drive the rotation of the fan blades and the cutter disc. The grass is sucked up by the rotation of the fan blades, and the rotation of the cutter disc causes the two layers of blades on the cutter disc to cut the grass at the same time, cutting the grass into multiple sections. The cut grass sections stay for a while in the cavity of the cutter disc protective cover with the help of wind force, and the upper blades of the cutter disc cut the grass sections twice or multiple times, achieving the effect of crushing the grass, and then the crushed grass is discharged onto the lawn through the air flow of the vent, and the accumulated crushed grass is combed by the baffle on the cutter disc protective cover, so that it settles on the soil and becomes fertilizer.

[0034] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A grass-chopping mechanism for a lawn mower, characterized in that: The utility model comprises a main mower body, a mower assembly and a driving device installed on the main mower body, wherein the mower assembly is installed at the bottom of the driving device, the mower assembly comprises a cutter disc, a fan blade and a cutter disc protective cover, the fan blade is arranged between the cutter disc and the cutter disc protective cover, the cutter disc is provided with an upper and lower layer of blades for mowing grass, the driving device is used to drive the mower assembly to cut grass, and the cutter disc protective cover is also provided with a height adjustment mechanism for adjusting the height of the cutter disc.

2. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: A plurality of evenly arranged baffles are provided on the side of the blade disc protection cover close to the forward direction, which are used to avoid hard objects when moving forward. A plurality of spaced-apart baffles are provided on the side of the blade disc protection cover away from the forward direction, which are used to comb out grass clippings that fall on the lawn. Ventilation holes for ventilation and blocking longer grass sections are provided above the baffles.

3. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: The driving device is a driving motor, and a cutter disc mounting seat is connected to the output shaft end of the driving motor. The fan blade is mounted on the cutter disc mounting seat and locked by screws. The cutter disc is mounted on the bottom of the cutter disc mounting seat and fixed by screws.

4. The grass-chopping mechanism of a lawn mower according to claim 3, characterized in that: A first through hole is provided at the center of the blade protection cover, and the blade protection cover is sleeved on the head of the drive motor. The diameter of the first through hole is larger than the outer diameter of the head of the drive motor. The output shaft of the drive motor passes through the blade protection cover, the fan blades and the blade disc in sequence from top to bottom. The rotation of the output shaft of the drive motor drives the rotation of the fan blades and the blade disc.

5. The grass-chopping mechanism of a lawn mower according to claim 3, characterized in that: The main mower body is provided with a guide block, which is connected to the head of the drive motor through a connecting rod, one end of the connecting rod is rotatably connected to the head of the drive motor through a bearing, and the other end of the connecting rod is rotatably connected to the guide block through a bearing.

6. The grass-chopping mechanism of a lawn mower according to claim 5, characterized in that: The guide block is provided with a spring for alleviating the gravity of the mowing assembly.

7. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: The bottom of the cutter disc is provided with a plurality of evenly arranged blades, and the top of the cutter disc is provided with a plurality of blades corresponding to the blades at the bottom of the cutter disc, and the blades at the bottom of the cutter disc and the blades at the top of the cutter disc are connected with each other by bolts.

8. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: Two blade disc protection strips are also provided at the bottom of the blade disc protection cover. A plurality of through holes are provided on the blade disc protection strips. The through holes are used for grass cutting and air convection to prevent grass from being trapped or blocked.

9. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: The height adjustment mechanism includes a lifting motor, a support plate, a screw and a pallet. The lifting motor is installed above the support plate. The output shaft of the lifting motor is connected to the screw and drives the screw to rotate. A screw nut is sleeved on the screw. The rotation of the screw drives the screw nut to move up and down. Parallel pull rods are provided on both sides of the screw. One end of the pull rod is fixed to the support plate, and the other end of the pull rod is fixed to the pallet.

10. The grass-chopping mechanism of a lawn mower according to claim 1, characterized in that: The main mower comprises a frame, a front-drive wheel set, a rear-drive wheel set and a first motor, wherein the front-drive wheel set comprises two orthogonal wheels, the rear-drive wheel set comprises two hub motor drive wheels, and the first motor is mounted on the rear-drive wheel set to drive the rotation of the hub motor drive wheels.

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