Walking type mower

Abstract

The invention discloses a walking type mower, relates to the field of mowers, and solves the problem that an existing walking type mower is difficult to weed deep gullies, the walking type mower comprises a protective shell and a holding rod mounted on the outer side of the protective shell, a mounting disc is mounted at the bottom of the protective shell, and a driving motor is mounted at the top of the mounting disc; a rope disc is arranged at the bottom of the mounting disc, and two grass trimming ropes are arranged on the outer side of the rope disc; the grass trimmer further comprises a rope pressing mechanism used for adjusting the length of the grass trimming rope, the rope pressing mechanism is installed on the outer side of the installation disc, the rope pressing mechanism comprises a pressing ring arranged on the outer side of the rope disc, and the pressing ring can press and contract the length of the grass trimming rope; by means of the rope pressing mechanism, an eccentric wheel can press a pressing ring downwards, the pressing ring abuts against the outer side of a grass trimming rope, the grass trimming rope swings downwards, the length of the grass trimming rope is adjusted, a rope disc can treat weeds in a gully through the grass trimming rope, and therefore the effect of gully weeding is achieved.

Description

Technical Field

[0001] The present invention relates to the field of lawn mowers, in particular to a walk-behind lawn mower. Background Art

[0002] A walk-behind lawn mower is a device that uses electricity to drive the cutting disc to rotate at high speed, thereby cutting lawn weeds. It is widely used in agriculture, gardening and forage harvesting machinery and has the characteristics of easy operation, strong adaptability and high efficiency.

[0003] At present, the cutting disc of the walk-behind lawn mower is mostly equipped with a weed rope. It is driven by the power of the gasoline engine, which drives the rope disc to rotate at high speed, causing the weed rope on the outside of the rope disc to rotate as well, generating a strong cutting force to cut the weeds. The weed rope is flexible and will bend when it hits hard objects, so it will not throw hard objects such as pebbles at high speed. However, when weeding narrow gullies, the weed rope is in a horizontal state while rotating, which will make the entire cutting surface larger and make it difficult to penetrate into the bottom of the gully for weeding. Summary of the Invention

[0004] The object of the present invention is to provide a walk-behind lawn mower to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A walk-behind lawn mower comprises: a protective shell and a grip fixedly mounted on the outside of the protective shell, a mounting plate fixedly mounted on the bottom of the protective shell, a drive motor located inside the protective shell fixedly mounted on the top of the mounting plate, a rope drum provided at the bottom of the mounting plate, the top of the rope drum fixedly connected to the output end of the drive motor, and two symmetrically distributed grass-cutting ropes provided on the outside of the rope drum; and further comprising: a rope-pressing mechanism for adjusting the length of the grass-cutting rope, the rope-pressing mechanism being mounted on the outside of the mounting plate, the rope-pressing mechanism comprising a pressure ring provided on the outside of the rope drum, the pressure ring The ring can press and shrink the length of the mowing rope; the distance adjusting mechanism is used to adjust the distance of the mowing rope when it is rotating, and the distance adjusting mechanism is installed on the top of the mounting plate. The distance adjusting mechanism includes two eccentric wheels symmetrically arranged on the outside of the protective shell, and the two eccentric wheels can adjust the height of the pressure ring; the fixed plate mechanism is used to provide shielding for the weed debris splashed by the mowing rope, and the fixed plate mechanism is installed on the outside of the grip, and the fixed plate mechanism includes a shield arranged on the outside of the grip, and the shield can shield the splashed weed debris, and the position of the shield can be adjusted and positioned.

[0007] Preferably, the rope pressing mechanism also includes a mounting ring fixedly mounted on the top of the pressure ring, a positioning ring fixedly mounted on the inner side of the mounting ring, a ring frame fixedly mounted on the outer side of the rope drum, the positioning ring slidably mounted on the outer side of the ring frame, a positioning shaft is rotatably mounted on the top of the mounting ring, a ring box is provided at the bottom of the mounting disk, the positioning shaft is installed on the inner side of the ring box, a plurality of mounting rods equidistantly distributed are fixedly mounted on the top of the ring box, the mounting rod slides through the mounting disk, a contact ring is provided on the top of the mounting disk, the bottom of the contact ring is fixedly connected to the end of the mounting rod away from the ring box, the top of the contact ring contacts the outer side of the eccentric wheel, and a plurality of first springs symmetrically distributed on the center are fixedly mounted between the contact ring and the mounting disk.

[0008] Preferably, the distance adjustment mechanism also includes two positioning rods symmetrically fixedly mounted on the outside of the protective shell, the two eccentric wheels are rotatably mounted on the outside of the positioning rods, a gear is fixedly mounted on the side of the eccentric wheel close to the protective shell, two symmetrically distributed rack plates are provided on the outside of the protective shell, the two rack plates are respectively meshed with the two gears, an L-shaped push rod is fixedly mounted on the end of the rack plate away from the gear, a first moving block is fixedly mounted between the two L-shaped push rods, the first moving block is slidably mounted on the inner side of the grip rod, and a first long groove for limiting the sliding of the L-shaped push rod is provided on the outer side of the grip rod, an adjusting rod is rotatably mounted on the inner side of the grip rod, a first external thread is provided on the outer side of the adjusting rod, the first moving block is threadedly assembled on the first external thread of the adjusting rod, and a first optical axis for limiting the sliding of the first moving block is fixedly mounted on the inner side of the grip rod.

[0009] Preferably, the fixed plate mechanism also includes a second moving block slidably mounted on the inner side of the grip rod, the outer side of the adjusting rod is provided with a second external thread, the second moving block is threadably assembled on the second external thread of the adjusting rod, and a second optical axis for limiting the sliding of the second moving block is fixedly mounted on the inner side of the grip rod, a mounting plate is fixedly mounted on the top of the baffle, a circular hole corresponding to the grip rod is provided on the outer side of the mounting plate, two symmetrically distributed pulling plates are slidably mounted on the inner side of the mounting plate, an inserting plate is fixedly mounted on the side of the pulling plate close to the adjusting rod, a sliding sleeve is slidably mounted on the outer side of the inserting plate, and the sliding sleeve is fixed The cam is installed on the inner side of the circular hole of the mounting plate, and the outer side of the grip rod is provided with a second long groove for the sliding sleeve to limit the sliding. The inner side of the grip rod and the outer side of the second moving block are both provided with a slot for the plug-in plate to limit the insertion. The pitch of the first external thread on the grip rod is smaller than the pitch of the second external thread, and the rotation direction of the first external thread on the grip rod is opposite to the rotation direction of the second external thread. A second spring and a baffle are fixedly installed on the side of the pull plate away from the plug-in plate, and one end of the second spring away from the pull plate is fixedly installed on the inner side of the mounting plate, and a sliding cavity for the baffle to limit the sliding is provided on the inner side of the mounting plate.

[0010] Preferably, two symmetrically distributed rings are fixedly installed on the outer side of the rope drum, and the two rings are slidably installed on the outer sides of the two mowing ropes respectively.

[0011] Preferably, a retaining cylinder is fixedly mounted on the outer side of the mounting plate, and the outer side of the annular box is in contact with the inner side of the retaining cylinder.

[0012] Preferably, two symmetrically distributed guide bars are provided on the outer side of the eccentric wheel, and the guide bars are fixedly mounted on the top of the contact ring.

[0013] Preferably, a sleeve plate is slidably mounted on the outer side of the L-shaped push rod, and the sleeve plate is fixedly mounted on the outer side of the protective shell.

[0014] Preferably, a sleeve frame is fixedly mounted on the top of the rack plate, a positioning block is slidably mounted on the inner side of the sleeve frame, and the positioning block is fixedly mounted on the outer side of the protective shell.

[0015] Preferably, a baffle box is fixedly mounted on the outer side of the protective shell, and the baffle box is located below the grip rod, and a movable plate is slidably mounted on the inner side of the baffle box, and one side of the movable plate is fixedly mounted on the outer side of the mounting plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses a rope pressing mechanism to enable the eccentric wheel to press the pressure ring downward. The pressure ring presses against the outside of the mowing rope, causing the mowing rope to swing downward, thereby adjusting the length of the mowing rope. The rope drum can use the mowing rope to process the weeds in the gully, and during the rotation of the rope drum, the pressure ring can rotate synchronously, thereby achieving the effect of weeding in the gully.

[0018] 2. The present invention uses a distance adjustment mechanism to make the rack plate tilt downward when the adjusting rod is rotated, thereby realizing the rotation of the gear, facilitating the rotation of the eccentric wheel to press the contact ring. During the rotation of the mowing rope, the length of the mowing rope can be adjusted accordingly, making it convenient for the staff to adjust the mowing rope in time according to the width of the gully, thereby improving the weeding efficiency and achieving the effect of rapid weeding.

[0019] 3. The present invention uses a fixed plate mechanism to enable the adjusting rod to drive the second movable block to move in the opposite direction of the first movable block during the process of adjusting the length of the mowing rope. The second movable block can move the shield away from the protective shell, making it easier for the staff to extend the rope drum into deeper ditches, thereby facilitating weeding in ditches of greater depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the grass rope and protective shell in the present invention;

[0022] Figure 3 Schematic diagram of the contact plate and pressure ring structure in the present invention;

[0023] Figure 4 Schematic diagram of the rack plate and eccentric wheel structure in the present invention;

[0024] Figure 5 Schematic diagram of the structure of the L-shaped push rod and the first moving block in the present invention;

[0025] Figure 6 Schematic diagram of the mounting plate and shield structure in the present invention;

[0026] Figure 7 This is a schematic diagram of the sliding frame and pull plate structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the baffle and plug-in plate structure in the present invention.

[0028] In the figure: 1. Protective shell; 2. Grip; 3. Mounting plate; 4. Drive motor; 5. Rope drum; 6. Mowing rope; 7. Pressure ring; 8. Eccentric wheel; 9. Baffle; 10. Mounting ring; 11. Positioning ring; 12. Ring frame; 13. Positioning shaft; 14. Ring box; 15. Mounting rod; 16. Contact ring; 17. Positioning rod; 18. Gear; 19. Rack plate; 20. L-shaped push rod; 21. First moving block; 22. Adjusting rod; 23. Second moving block; 24. Mounting plate; 25. Pull plate; 26. Insert plate; 27. Sliding sleeve; 28. First spring; 29. ​​Second spring; 30. Baffle; 31. Ring; 32. Baffle cylinder; 33. Guide strip; 34. Sleeve plate; 35. Sleeve frame; 36. Positioning block; 37. Baffle box; 38. Movable plate. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-8 The walk-behind lawn mower shown in the figure includes a protective shell 1 and a handle 2 fixedly mounted on the outside of the protective shell 1. A mounting plate 3 is fixedly mounted on the bottom of the protective shell 1. A driving motor 4 located inside the protective shell 1 is fixedly mounted on the top of the mounting plate 3. A rope drum 5 is provided at the bottom of the mounting plate 3. The top of the rope drum 5 is fixedly connected to the output end of the driving motor 4. Two symmetrically distributed grass cutting ropes 6 are provided on the outside of the rope drum 5. The driving motor 4 can drive the rope drum 5 to rotate at a high speed, so that the two grass cutting ropes 6 on the rope drum 5 rotate to cut weeds; it also includes: a rope pressing mechanism for adjusting the length of the grass cutting rope 6, and the rope pressing mechanism is installed on the mounting plate 3. On the outside, the rope pressing mechanism includes a pressing ring 7 arranged on the outside of the rope drum 5, and the pressing ring 7 can press and shrink the length of the grass-cutting rope 6; the distance adjusting mechanism is used to adjust the distance when the grass-cutting rope 6 is rotating. The distance adjusting mechanism is installed on the top of the mounting disk 3. The distance adjusting mechanism includes two eccentric wheels 8 symmetrically arranged on the outside of the protective shell 1, and the two eccentric wheels 8 can adjust the height of the pressing ring 7; the fixed plate mechanism is used to provide shielding for the weed debris splashed by the grass-cutting rope 6. The fixed plate mechanism is installed on the outside of the grip 2. The fixed plate mechanism includes a shield 9 arranged on the outside of the grip 2. The shield 9 can shield the splashed weed debris and can adjust and position the shield 9.

[0031] The rope pressing mechanism also includes a mounting ring 10 fixedly mounted on the top of the pressure ring 7, a positioning ring 11 is fixedly mounted on the inner side of the mounting ring 10, and an annular frame 12 is fixedly mounted on the outer side of the rope drum 5. The positioning ring 11 is slidably mounted on the outer side of the annular frame 12, and the rope drum 5 can drive the positioning ring 11 to rotate through the annular frame 12, so that the positioning ring 11 drives the pressure ring 7 to rotate synchronously through the mounting ring 10, and the pressure ring 7 and the grass rope 6 can be in a synchronously rotating state to prevent the grass rope 6 and the pressure ring 7 from wearing out. A positioning shaft 13 is rotatably mounted on the top of the mounting ring 10, and the mounting An annular box 14 is provided at the bottom of the disk 3, and the positioning shaft 13 is installed on the inner side of the annular box 14. A plurality of mounting rods 15 with equal spacing are fixedly installed on the top of the annular box 14. The mounting rods 15 slide through the mounting disk 3. A contact ring 16 is provided on the top of the mounting disk 3. The bottom of the contact ring 16 is fixedly connected to the end of the mounting rod 15 away from the annular box 14. The contact ring 16 can drive the positioning shaft 13 to move downward through the mounting rod 15, so that the positioning shaft 13 drives the mounting ring 10 to move synchronously, and the mounting ring 10 can drive the positioning ring 11 along the ring The outer side of the shaped frame 12 moves downward, and the mounting ring 10 can drive the pressure ring 7 to press the grass rope 6 to adjust the length of the grass rope 6, which is convenient for weeding the gully. The top of the contact ring 16 contacts the outer side of the eccentric wheel 8, so that when the eccentric wheel 8 rotates, it can press the contact ring 16 downward along with the rotation angle of the eccentric wheel 8 to adjust the height of the pressure ring 7. A plurality of first springs 28 with a central symmetrical distribution are fixedly installed between the contact ring 16 and the mounting disk 3 to facilitate the movement and reset of the contact ring 16. The outer side of the rope drum 5 is fixed Two symmetrically distributed rings 31 are installed, and the two rings 31 are slidably installed on the outside of the two mowing ropes 6, so that when the pressure ring 7 presses the mowing rope 6, the mowing rope 6 can bend downward with the ring 31 as the fulcrum, providing protection for the mowing rope 6. A blocking cylinder 32 is fixedly installed on the outside of the mounting plate 3, and the outer side of the annular box 14 contacts the inner side of the blocking cylinder 32, so that when the annular box 14 moves downward, it can drive the blocking cylinder 32 to move synchronously, so that the blocking cylinder 32 provides protection for the annular box 14 to prevent flying weed debris from entering the annular box 14.

[0032] Example 2: Please refer to Figure 2-Figure 6This embodiment further explains the first embodiment. The distance adjustment mechanism shown in the figure also includes two positioning rods 17 symmetrically fixedly installed on the outside of the protective shell 1. The two eccentric wheels 8 are respectively rotatably installed on the outside of the positioning rods 17, so that the positioning rods 17 provide positioning for the eccentric wheels 8. A gear 18 is fixedly installed on the side of the eccentric wheel 8 close to the protective shell 1. Two symmetrically distributed rack plates 19 are provided on the outside of the protective shell 1. The two rack plates 19 are respectively engaged with the two gears 18. When the rack plates 19 move, they can drive the eccentric wheels 8 through the gears 18. The rack plate 19 is fixedly mounted with an L-shaped push rod 20 at one end away from the gear 18, and a first moving block 21 is fixedly mounted between the two L-shaped push rods 20. The first moving block 21 is slidably mounted on the inner side of the grip 2, and a first long groove for limiting the sliding of the L-shaped push rod 20 is provided on the outer side of the grip 2. An adjusting rod 22 is rotatably mounted on the inner side of the grip 2, and a first external thread is provided on the outer side of the adjusting rod 22. The first moving block 21 is threadedly assembled on the first external thread of the adjusting rod 22, and a groove for limiting the sliding of the first moving block 21 is fixedly mounted on the inner side of the grip 2. The first optical axis, the adjusting rod 22 can drive the first moving block 21 to move along the outside of the first optical axis through the first external thread, so that the first moving block 21 pushes the two L-shaped push rods 20 to move along the first long groove on the grip 2, and the L-shaped push rods 20 can push the rack plate 19 to move. Two symmetrically distributed guide strips 33 are provided on the outside of the eccentric wheel 8. The guide strips 33 are fixedly installed on the top of the contact ring 16, so that the eccentric wheel 8 can rotate between the two guide strips 33, and the eccentric wheel 8 can smoothly push the contact ring 16 downward, and the L-shaped push rods 20 can push the rack plate 19 to move. 0 is slidably installed with a sleeve plate 34 on the outside of the protective shell 1, and the sleeve plate 34 is fixedly installed on the outside of the protective shell 1, so that the L-shaped push rod 20 can move along the outside of the sleeve plate 34, providing support and guidance for the movement of the L-shaped push rod 20, and a sleeve frame 35 is fixedly installed on the top of the rack plate 19, and a positioning block 36 is slidably installed on the inside of the sleeve frame 35, and the positioning block 36 is fixedly installed on the outside of the protective shell 1, so that the rack plate 19 can drive the sleeve frame 35 to move along the outside of the positioning block 36, thereby improving the stability of the movement of the rack plate 19 and ensuring the engagement of the rack plate 19 with the gear 18.

[0033] Example 3: Please refer to Figures 1-8, this embodiment is further explained for other embodiments. The fixed plate mechanism in the figure also includes a second moving block 23 slidably mounted on the inner side of the grip 2, and a second external thread is provided on the outer side of the adjusting rod 22. The second moving block 23 is threadedly assembled on the second external thread of the adjusting rod 22, and a second optical axis for limiting the sliding of the second moving block 23 is fixedly installed on the inner side of the grip 2. When the grip 2 is rotated, the second moving block 23 can be driven to move along the outer side of the second optical axis and the inner side of the grip 2 through the second external thread on the outer side thereof. A mounting plate 24 is fixedly mounted on the top of the blocking cover 9. A circular hole corresponding to the grip 2 is provided on the outer side of the mounting plate 24. Two symmetrically distributed pull plates 25 are slidably installed on the inner side of the handle 2, and an insert plate 26 is fixedly installed on the side of the pull plate 25 close to the adjusting rod 22. A sliding sleeve 27 is slidably installed on the outer side of the insert plate 26. The sliding sleeve 27 is fixedly installed on the inner side of the circular hole of the mounting plate 24, and a second long groove for the sliding sleeve 27 to limit the sliding of the mounting plate 24 is provided on the outer side of the handle 2. A slot for the insert plate 26 to limit the sliding of the sliding sleeve 27 is provided on the inner side of the handle 2 and the outer side of the second moving block 23. When the insert plate 26 is inserted into the slot of the second moving block 23, the second moving block 23 can drive the mounting plate 24 to move synchronously through the insert plate 26, and the mounting plate 24 can drive the shield 9 to move synchronously. The first outer screw on the handle 2 The pitch of the thread is smaller than the pitch of the second external thread, and the rotation direction of the first external thread on the grip 2 is opposite to the rotation direction of the second external thread, so that when the length of the mowing rope 6 is shortened, the shield 9 can be kept away from the protective shell 1, which is convenient for extending the mowing rope 6 into the ravine, and a second spring 29 and a baffle 30 are fixedly installed on the side of the pull plate 25 away from the plug plate 26. The end of the second spring 29 away from the pull plate 25 is fixedly installed on the inner side of the mounting plate 24. The elasticity of the second spring 29 can be used to make the pull plate 25 push the plug plate 26 to move, so that the plug plate 26 can be inserted into the slot of the second moving block 23, and the plug plate 26 can be inserted into the slot on the grip 2, so that The baffle 9 is directly away from the protective shell 1, which is convenient for inspecting the rope drum 5. A sliding cavity is provided on the inner side of the mounting plate 24 for limiting the sliding of the baffle 30, so that the baffle 30 can provide protection for the second spring 29. A baffle box 37 is fixedly installed on the outer side of the protective shell 1, and the baffle box 37 is located below the grip 2. A movable plate 38 is slidably installed on the inner side of the baffle box 37. One side of the movable plate 38 is fixedly installed on the outer side of the mounting plate 24, so that when the mounting plate 24 moves, it can drive the movable plate 38 to move along the inner side of the baffle box 37, so that the movable plate 38 and the baffle box 37 can provide protection for the first long groove of the grip 2 to prevent weed debris from entering the first long groove.

[0034] Working principle: First, the staff starts the driving motor 4, so that the driving motor 4 drives the rope drum 5 to rotate, and the rope drum 5 drives the two grass cutting ropes 6 to rotate. At the same time, the staff holds the handle 2, and aims the rope drum 5 at the weeds on the lawn, so that the grass cutting ropes 6 cut the straw. When the staff needs to deal with the weeds in the gully, the staff rotates the adjusting rod 22, so that the adjusting rod 22 drives the first moving block 21 to move along the outside of the first optical axis through the first external thread on the outer side of the adjusting rod 22, so that the first moving block 21 pushes the two L-shaped push rods 20 along the first external thread on the handle 2. As a long groove moves, the two L-shaped push rods 20 push the two rack plates 19 to move synchronously, so that the rack plate 19 drives the gear 18 to rotate, and the gear 18 drives the eccentric wheel 8 to rotate, so that the two eccentric wheels 8 synchronously press the contact ring 16 to move downward, and the contact ring 16 drives the annular box 14 to move downward through the mounting rod 15, so that the annular box 14 drives the mounting ring 10 to move synchronously through the positioning shaft 13, and the mounting ring 10 drives the pressure ring 7 to move downward, so that the pressure ring 7 presses the grass rope 6, and the grass rope 6 can swing downward with the ring 31 as the fulcrum, shortening the grass rope 6. The length of the grass cutting rope 6 is 0. At the same time, the mounting ring 10 drives the positioning ring 11 to move downward along the outer side of the annular frame 12. The rope drum 5 can drive the mounting ring 10 to rotate synchronously with the positioning ring 11 through the annular frame 12, so that the mounting ring 10 drives the pressure ring 7 to rotate, and the pressure ring 7 can rotate synchronously with the grass cutting rope 6, so that there will be no wear between the grass cutting rope 6 and the pressure ring 7. At the same time, the gripping rod 2 drives the second moving block 23 to move along the outer side of the second optical axis and the inner side of the gripping rod 2 through the second external thread on its outer side, so that the second moving block 23 pushes the inserting plate 26 to move synchronously through the slot on its outer side. The inserting plate 26 drives the sliding sleeve 27 to move along the second long groove on the gripping rod 2, and the sliding sleeve 27 and the inserting plate 26 can drive the mounting plate 24 to move along the outer side of the gripping rod 2, so that the mounting plate 24 drives the baffle 9 away from the protective shell 1. Finally, the staff extends the rope drum 5 into the gully, so that the shortened mowing rope 6 can process the weeds in the gully. In addition, the staff can adjust the length of the mowing rope 6 by adjusting the height of the pressure ring 7, so that the mowing rope 6 can process gullies of greater depth and width, thereby achieving the effect of weeding in the gully.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A walk-behind lawn mower, characterized in that: include: A protective shell (1) and a gripping rod (2) mounted on the outside of the protective shell (1); a mounting plate (3) is mounted on the bottom of the protective shell (1); a driving motor (4) is mounted on the top of the mounting plate (3); a rope drum (5) is provided at the bottom of the mounting plate (3); and two grass-cutting ropes (6) are provided on the outside of the rope drum (5); Also includes: A rope-pressing mechanism is used to adjust the length of the grass-cutting rope (6), the rope-pressing mechanism being installed on the outside of the installation disk (3), the rope-pressing mechanism comprising a pressing ring (7) arranged on the outside of the rope disk (5), the pressing ring (7) being capable of pressing and contracting the length of the grass-cutting rope (6); a distance adjustment mechanism for adjusting the distance of the mowing rope (6) when the mowing rope (6) is rotating, the distance adjustment mechanism being mounted on the top of the mounting plate (3), the distance adjustment mechanism comprising two eccentric wheels (8) symmetrically arranged on the outside of the protective housing (1), the two eccentric wheels (8) being capable of adjusting the height of the pressure ring (7); A fixed plate mechanism is used to shield weed debris splashed by the mowing rope (6), the fixed plate mechanism is installed on the outside of the gripping rod (2), and the fixed plate mechanism includes a shield (9) arranged on the outside of the gripping rod (2), the shield (9) can shield the splashed weed debris, and the position of the shield (9) can be adjusted and positioned.

2. A walk-behind lawn mower according to claim 1, characterized in that: The rope pressing mechanism further comprises a mounting ring (10) mounted on the top of the pressure ring (7), a positioning ring (11) being fixedly mounted on the inner side of the mounting ring (10), a ring frame (12) being fixedly mounted on the outer side of the rope drum (5), the positioning ring (11) being slidably mounted on the outer side of the ring frame (12), a positioning shaft (13) being rotatably mounted on the top of the mounting ring (10), a ring box (14) being provided at the bottom of the mounting disk (3), a plurality of mounting rods (15) being installed at the top of the ring box (14), the mounting rods (15) slidingly passing through the mounting disk (3), a contact ring (16) being provided at the top of the mounting disk (3), the bottom of the contact ring (16) being in contact with the mounting rod (15), the top of the contact ring (16) being in contact with the outer side of the eccentric wheel (8), and a plurality of first springs (28) being fixedly mounted between the contact ring (16) and the mounting disk (3).

3. The walk-behind lawn mower according to claim 2, characterized in that: The distance adjustment mechanism further comprises two positioning rods (17) symmetrically mounted on the outside of the protective shell (1), the two eccentric wheels (8) are rotatably mounted on the outside of the positioning rods (17), a gear (18) is fixedly mounted on one side of the eccentric wheel (8), two rack plates (19) are provided on the outside of the protective shell (1), an L-shaped push rod (20) is fixedly mounted on one end of the rack plate (19), a first moving block (21) is mounted between the two L-shaped push rods (20), the first moving block (21) is slidably mounted on the inside of the gripping rod (2), an adjusting rod (22) is rotatably mounted on the inside of the gripping rod (2), a first external thread is provided on the outside of the adjusting rod (22), the first moving block (21) is threadedly assembled on the first external thread of the adjusting rod (22), and a first optical axis for limiting the sliding of the first moving block (21) is fixedly mounted on the inside of the gripping rod (2).

4. The walk-behind lawn mower according to claim 3, characterized in that: The fixed plate mechanism also includes a second moving block (23) slidably mounted on the inner side of the gripping rod (2), a second external thread is provided on the outer side of the adjusting rod (22), the second moving block (23) is threadedly assembled on the second external thread of the adjusting rod (22), and a second optical axis for limiting the sliding of the second moving block (23) is fixedly mounted on the inner side of the gripping rod (2), a mounting plate (24) is mounted on the top of the blocking cover (9), a circular hole is provided on the outer side of the mounting plate (24), two pulling plates (25) are slidably mounted on the inner side of the mounting plate (24), and a plug plate (26) is fixedly mounted on one side of the pulling plate (25), A sleeve (27) is slidably mounted on the outer side of the inserting plate (26), and the sleeve (27) is fixedly mounted on the inner side of the circular hole of the mounting plate (24). A slot for limiting the insertion of the inserting plate (26) is provided on the inner side of the gripping rod (2) and the outer side of the second moving block (23). The pitch of the first external thread on the gripping rod (2) is smaller than the pitch of the second external thread, and the rotation direction of the first external thread on the gripping rod (2) is opposite to the rotation direction of the second external thread. A second spring (29) is fixedly mounted on one side of the pulling plate (25), and one end of the second spring (29) is fixedly mounted on the inner side of the mounting plate (24).

5. The walk-behind lawn mower according to claim 1, characterized in that: Two ferrules (31) are fixedly mounted on the outer side of the rope drum (5), and the two ferrules (31) are slidably mounted on the outer sides of the two mowing ropes (6).

6. The walk-behind lawn mower according to claim 2, characterized in that: A retaining cylinder (32) is installed on the outer side of the mounting plate (3), and the outer side of the annular box (14) is in contact with the inner side of the retaining cylinder (32).

7. The walk-behind lawn mower according to claim 3, characterized in that: Two guide bars (33) are provided on the outer side of the eccentric wheel (8), and the guide bars (33) are installed on the top of the contact ring (16).

8. The walk-behind lawn mower according to claim 3, characterized in that: A sleeve plate (34) is slidably mounted on the outer side of the L-shaped push rod (20), and the sleeve plate (34) is mounted on the outer side of the protective shell (1).

9. The walk-behind lawn mower according to claim 3, characterized in that: A sleeve frame (35) is installed on the top of the rack plate (19), a positioning block (36) is slidably installed on the inner side of the sleeve frame (35), and the positioning block (36) is installed on the outer side of the protective shell (1).

10. The walk-behind lawn mower according to claim 4, characterized in that: A baffle box (37) is fixedly mounted on the outer side of the protective shell (1), a movable plate (38) is slidably mounted on the inner side of the baffle box (37), and one side of the movable plate (38) is mounted on the outer side of the mounting plate (24).

Images