Hand-pushed lawn mower

Abstract

The invention relates to the technical field of lawn mowers, and discloses a hand-push lawn mower, comprising a lawn mower body, wherein a chassis is arranged on the lawn mower body, and a cutting mechanism is installed on the chassis through a mounting mechanism; the mounting mechanism comprises a cutter disc arranged at the bottom of the chassis, and the cutting mechanism comprises two cutter shafts symmetrically arranged on the cutter disc, and blades are arranged on the two cutter shafts; a driving mechanism and a first adjusting mechanism are also arranged on the lawn mower body, and when the lawn mower body moves along the ground, the driving mechanism drives the two blades to rotate to cut grass, and the first adjusting mechanism adjusts the relative distance between the two blades to avoid obstacles; the hand-push lawn mower adopts an adjustable double-blade mode to cut grass, can intelligently detect ground protrusions, and achieves a mowing range that covers the ground to the greatest extent while avoiding obstacles by adjusting the relative distance between the two blades and the angle of the cutter disc.

Description

Technical Field

[0001] The invention relates to the technical field of lawn mowers, in particular to a hand-push lawn mower. Background Art

[0002] A lawn mower is a mechanical device used for mowing grass, usually consisting of a cutter disc, an engine, a running wheel, a running mechanism, a blade, a handrail, and a control part. The cutter disc is mounted on the running wheel, the engine is mounted on the cutter disc, and the blade is mounted on the output shaft of the engine. The blade uses the high-speed rotation of the engine to mow the lawn.

[0003] When using a lawn mower, you need to pay attention to ground obstacles, including movable branches, stones and various debris placed on the ground, as well as terrain protrusions such as stones fixed on the ground. If these obstacles touch the blade, not only will the blade be damaged, the obstacle itself will also be thrown out and cause safety risks.

[0004] Therefore, when using a lawn mower, it is necessary to first clean the site and remove obstacles or avoid them during use, which is labor-intensive and reduces the efficiency of mowing. Even if obstacles are manually cleared in advance, there may still be some obstacles that are covered by grass and not checked or are fixed on the ground and cannot be cleared. Summary of the invention

[0005] The present invention provides a hand-push lawn mower, which has the function of mowing with an adjustable double-blade mode, can intelligently detect ground protrusions, and achieve the beneficial effect of maximally covering the ground mowing range while avoiding obstacles by adjusting the relative distance between the two blades and the angle of the cutter disc. This solves the problem mentioned in the above background technology that when using a lawn mower, it is necessary to first clean the site and remove obstacles or pay attention to avoid them during use, which is more labor-intensive and reduces the efficiency of mowing.

[0006] The present invention provides the following technical solution: a hand-push lawn mower, comprising a lawn mower body, the lawn mower body is provided with a chassis, and a cutting mechanism is installed on the chassis through a mounting mechanism;

[0007] The mounting mechanism comprises a knife disc arranged at the bottom of the chassis, and the cutting mechanism comprises two knife shafts symmetrically arranged on the knife disc, and blades are arranged on both knife shafts;

[0008] The lawn mower body is also provided with a driving mechanism and a first adjusting mechanism. When the lawn mower body moves along the ground, the driving mechanism drives the two blades to rotate to cut grass, and when the lawn mower body passes over a raised terrain, the first adjusting mechanism adjusts the relative distance between the two blades to avoid obstacles.

[0009] The first adjustment mechanism includes two first arc-shaped grooves symmetrically opened on the cutter disc, and a slide seat is arranged on each of the two cutter shafts. The two slide seats are respectively slidably connected in the two first arc-shaped grooves.

[0010] As an optional solution of the hand-push lawn mower of the present invention, wherein: a first cylinder is arranged on the cutter disc, the first cylinder is distributed along the perpendicular midline of the line segment connecting the midpoints of the two cutter shafts, and a first connecting shaft is arranged on the piston rod of the first cylinder;

[0011] The first adjustment mechanism also includes two connecting rods, one end of the two connecting rods are rotatably disposed on the first connecting shaft, and the other ends of the two connecting rods are rotatably disposed on the two knife shafts respectively.

[0012] As an optional solution of the hand-push lawn mower of the present invention, the driving mechanism includes an engine arranged on the lawn mower body, a rotating shaft is arranged on the output shaft of the engine, and the centers of the two first arc-shaped grooves are both located on the central axis of the rotating shaft;

[0013] Two first pulleys are arranged on the rotating shaft, and second pulleys are arranged on the two knife shafts. The two first pulleys are respectively connected to the two second pulleys through two belts.

[0014] As an optional solution of the hand-push lawn mower of the present invention, the mounting mechanism further comprises two slide bars symmetrically arranged on the blade disc, two second arc-shaped grooves are symmetrically provided on the chassis, the centers of the two second arc-shaped grooves are both located on the central axis of the rotating shaft, and the two slide bars are respectively slidably connected in the two second arc-shaped grooves;

[0015] The cutter disc is also provided with a connecting plate, and the connecting plate is rotatably connected to the rotating shaft.

[0016] As an optional solution of the hand-push lawn mower described in the present invention, the mounting mechanism further includes a discharge pipe and a guide plate arranged at the bottom of the blade disc, and the bottom ends of the discharge pipe and the guide plate are located lower than the blade.

[0017] As an optional solution of the hand-push lawn mower of the present invention, wherein: the lawn mower body is also provided with a second adjustment mechanism, and the second adjustment mechanism is used to adjust the angle of the two blades relative to the chassis;

[0018] The second adjusting mechanism comprises a second cylinder, and a second connecting shaft and a third connecting shaft are respectively provided at two ends of the second cylinder, the second connecting shaft is rotatably connected to the chassis, and the third connecting shaft is rotatably connected to the cutter disc.

[0019] As an optional solution of the hand-push lawn mower of the present invention, wherein: a plurality of detection mechanisms are arranged on the main body of the lawn mower, and the plurality of detection mechanisms are arranged linearly;

[0020] The detection mechanism comprises a slider arranged at the bottom of the chassis, a lifting rod is slidably arranged on the slider, a pulley is arranged on the lifting rod, and the slider is elastically connected to the lifting rod through a first spring;

[0021] During the movement of the lawn mower body, it is determined whether there is a raised terrain by detecting the rise and fall of the pulley.

[0022] As an optional solution of the hand-push lawn mower of the present invention, the detection mechanism further includes a horizontal groove opened on the chassis, the slider and the lifting rod are slidably connected to the horizontal groove, and the slider is elastically connected to the inner wall of the horizontal groove through a second spring;

[0023] The chassis is also provided with a vertical slot connected with the horizontal slot, the vertical slot is adapted to the lifting rod, and a sensor is arranged in the vertical slot.

[0024] As an optional solution of the hand-push lawn mower described in the present invention, two bearings are symmetrically arranged on the slide seat, and the knife shaft is connected to the inner rings of the two bearings.

[0025] As an optional solution of the hand-push lawn mower described in the present invention, a collecting bag and an armrest are also provided on the lawn mower body, and the collecting bag is located at the rear of the lawn mower body.

[0026] The present invention has the following beneficial effects:

[0027] 1. This push lawn mower uses a double-blade mode to cut the lawn, and has an intelligent obstacle avoidance function. The positions of the two blades on the blade disc are not fixed. When encountering obstacles such as stones fixed on the ground, the first adjustment mechanism can be used to adjust the two blades to form an arc based on the drive shaft, so that the relative distance between the two blades is expanded. When the main body of the lawn mower passes by, the obstacle does not intersect with the cutting range of the two blades, which plays a role in avoiding obstacles and preventing the blades from being damaged. It also simplifies the complex work procedure of manually cleaning the site before mowing.

[0028] 2. This push lawn mower also takes into account that if an obstacle exists near the edge of the cutting range in the direction of travel of the two blades, if the relative distance between the two blades is only increased, the larger area of ​​lawn in the middle will not be covered. Therefore, a second adjustment mechanism is also provided to adjust the angle of the blade disc. Two adjustment schemes are selected according to the distribution of specific obstacles, namely, rotation of the blade disc and combination of rotation of the blade disc and adjustment of the relative distance between the two blades, so as to achieve obstacle avoidance while covering a larger area of ​​lawn to the greatest extent.

[0029] 3. The push lawn mower is also equipped with a detection mechanism that can intelligently detect ground obstacles. There are multiple detection mechanisms arranged linearly, and the length, width and distribution position of the obstacles can be detected by pushing multiple pulleys through the obstacles. This provides data for the selection of obstacle avoidance solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 This is a first structural schematic diagram of the chassis in the present invention.

[0032] Figure 3 This is a second structural schematic diagram of the chassis in the present invention.

[0033] Figure 4 It is a first cross-sectional structural schematic diagram of the chassis in the present invention.

[0034] Figure 5 It is a second cross-sectional structural schematic diagram of the chassis in the present invention.

[0035] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0036] Figure 7 It is a second cross-sectional structural schematic diagram of the chassis in the present invention.

[0037] Figure 8 for Figure 7 A partial enlarged view of point B in the middle.

[0038] Fig. 9 It is a schematic diagram of the explosion structure of the cutter disc in the present invention.

[0039] Fig.10 It is a schematic diagram of the explosion structure of the driving mechanism in the present invention.

[0040] Fig.11 It is a schematic diagram of the working principle of the first adjustment mechanism in the present invention.

[0041] Fig.12It is a schematic diagram of the working principle of the second adjustment mechanism in the present invention.

[0042] In the figure: 100, lawn mower body; 110, collecting bag; 120, chassis; 130, handrail; 200, cutting mechanism; 210, knife shaft; 220, blade; 300, driving mechanism; 310, engine; 320, rotating shaft; 330, first pulley; 340, second pulley; 350, belt; 400, mounting mechanism; 410, knife disc; 420, slide bar; 430, second arc groove; 440, connecting plate; 450, discharge pipe; 460, guide plate; 500, The first adjusting mechanism; 510, the sliding seat; 520, the first arc groove; 530, the first cylinder; 540, the first connecting shaft; 550, the connecting rod; 560, the bearing; 600, the second adjusting mechanism; 610, the second cylinder; 620, the second connecting shaft; 630, the third connecting shaft; 700, the detecting mechanism; 710, the sliding block; 720, the lifting rod; 730, the pulley; 740, the first spring; 750, the horizontal groove; 760, the vertical groove; 770, the sensor; 780, the second spring. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0044] For example, see Figure 1-Figure 10 A hand-push lawn mower includes a lawn mower body 100, a chassis 120 is provided on the lawn mower body 100, and a cutting mechanism 200 is installed on the chassis 120 through a mounting mechanism 400;

[0045] The mounting mechanism 400 includes a knife disc 410 disposed at the bottom of the chassis 120, and the cutting mechanism 200 includes two knife shafts 210 symmetrically disposed on the knife disc 410, and blades 220 are disposed on both knife shafts 210;

[0046] The lawn mower body 100 is also provided with a driving mechanism 300 and a first adjusting mechanism 500. When the lawn mower body 100 moves along the ground, the driving mechanism 300 drives the two blades 220 to rotate to cut grass, and when the lawn mower body 100 passes over a raised terrain, the first adjusting mechanism 500 adjusts the relative distance between the two blades 220 to avoid obstacles.

[0047] The driving mechanism 300 includes an engine 310 disposed on the lawn mower body 100. A rotating shaft 320 is disposed on the output shaft of the engine 310. The centers of the two first arc-shaped grooves 520 are both located on the central axis of the rotating shaft 320.

[0048] Two first pulleys 330 are arranged on the rotating shaft 320, and second pulleys 340 are arranged on the two knife shafts 210. The two first pulleys 330 are respectively connected to the two second pulleys 340 through two belts 350.

[0049] The lawn mower body 100 is also provided with a collecting bag 110 and an armrest 130 . The collecting bag 110 is located at the rear of the lawn mower body 100 .

[0050] In this embodiment, the lawn mower body 100 can select various types of push lawn mowers, and set its travel direction as follows: Figure 1 As shown, the lawn mower moves horizontally from right to left. A chassis 120 is installed at the bottom of the lawn mower body 100, and a cutting mechanism 200 is installed on the chassis 120. The grass on the ground is cut by the cutting mechanism 200 while the lawn mower moves, and the cut grass enters the collection bag 110 located on the right side of the chassis 120. In addition, the handrail 130 is used to manually push the lawn mower body 100 to move forward. The lawn mower body 100 can also be self-propelled, but still needs to be pushed manually. In addition, the height of the lawn mower body 100 relative to its tires can usually be adjusted, and a control component for controlling the start of the lawn mower body 100, the engine gear, etc. is installed on the handrail 130. As conventional technical means, the specific structure and working principle of the lawn mower body 100 are not described in detail.

[0051] The cutting mechanism 200 selects a double-blade mode, and a fling blade can be selected to expand the mowing range compared to a single blade. The blades of a lawn mower generally include straight blades and fling blades. Generally, the blade 220 has a better effect on crushing brittle straw, but it is more easily damaged by hard objects than the straight blade.

[0052] Specifically, the blade disc 410 is installed at the bottom of the chassis 120, and the blade shaft 210 is connected to the blade disc 410. When the engine 310 installed in the lawn mower body 100 is started, the rotating shaft 320 and the two first pulleys 330 can be driven to rotate. The two first pulleys 330 then drive the two second pulleys 340 through the transmission of two belts 350, thereby driving the two blade shafts 210 and the two blades 220 to rotate, and the blades 220 rotate to cut the grass.

[0053] The cutting range of the two blades 220 is usually two close circles. When encountering ground obstacles such as raised terrain such as stones fixed on the ground, the relative distance between the two blades 220 can be adjusted by the first adjustment mechanism 500 to avoid the obstacles.

[0054] Embodiment 2: This embodiment is an improvement on Embodiment 1. For details, please refer to Figure 2-Figure 11 The first adjustment mechanism 500 includes two first arc-shaped grooves 520 symmetrically opened on the cutter disc 410, and a slide seat 510 is provided on each of the two cutter shafts 210, and the two slide seats 510 are respectively slidably connected in the two first arc-shaped grooves 520;

[0055] The cutter disc 410 is provided with a first cylinder 530, which is distributed along the perpendicular bisector of the line segment connected by the midpoints of the two cutter shafts 210, and a first connecting shaft 540 is provided on the piston rod of the first cylinder 530;

[0056] The first adjustment mechanism 500 further includes two connecting rods 550, one end of each of the two connecting rods 550 is rotatably disposed on the first connecting shaft 540, and the other ends of the two connecting rods 550 are rotatably disposed on the two knife shafts 210 respectively;

[0057] Two bearings 560 are symmetrically arranged on the slide seat 510 , and the knife shaft 210 is connected to the inner rings of the two bearings 560 .

[0058] In this embodiment: Fig.11 As shown, if the obstacle is in the traveling direction of the two blades 220 and is located in the middle of the cutting range of the two blades 220, the two blades 220 can be moved away from each other as shown in the figure, so that when passing the obstacle, the obstacle is not in the cutting range of the two blades 220, thereby avoiding the obstacle.

[0059] Specifically, when the central axis of the cutter disc 410 is in the horizontal direction, the two cutter shafts 210 are symmetrical based on the front and back of the cutter disc 410, and the first cylinder 530 installed on the cutter disc 410 is distributed along the perpendicular bisector of the line connecting the two cutter shafts 210, and the first connecting shaft 540 installed on its piston rod forms a "→" shape with the two connecting rods 550 and the two cutter shafts 210. When the piston rod controlling the first connecting shaft 540 moves to the left and shortens, since the lengths of the two connecting rods 550 are fixed, and the sliding seat 510 slides in the arc shape along the first arc groove 520 to have a limiting effect, the two sliding seats 510 will slide the two cutter shafts 210 to the left along the two first arc grooves 520 respectively. This will expand the relative distance between the two blades 220.

[0060] Furthermore, since the two first arc grooves 520 are arc-shaped based on the central axis of the rotating shaft 320 , after the positions of the two knife shafts 210 are changed, the length of the belt 350 remains unchanged, and the transmission of the two knife shafts 210 by the rotating shaft 320 is not affected.

[0061] Bearings 560 are installed on both the upper and lower sides of the slide seat 510 , and the knife shaft 210 is installed on the inner rings of the two bearings 560 to support the rotation of the knife shaft 210 .

[0062] Embodiment 3: This embodiment is an improvement on Embodiment 2. For details, please refer to Figure 2-Figure 12 The mounting mechanism 400 further includes two slide bars 420 symmetrically arranged on the blade disc 410, and two second arc grooves 430 are symmetrically opened on the chassis 120, the centers of the two second arc grooves 430 are both located on the central axis of the rotating shaft 320, and the two slide bars 420 are respectively slidably connected in the two second arc grooves 430;

[0063] The cutter head 410 is also provided with a connecting plate 440, which is rotatably connected to the rotating shaft 320;

[0064] The lawn mower body 100 is also provided with a second adjustment mechanism 600, which is used to adjust the angles of the two blades 220 relative to the chassis 120;

[0065] The second adjustment mechanism 600 includes a second cylinder 610 , and a second connecting shaft 620 and a third connecting shaft 630 are respectively provided at both ends of the second cylinder 610 . The second connecting shaft 620 is rotatably connected to the chassis 120 , and the third connecting shaft 630 is rotatably connected to the cutter disc 410 .

[0066] In this embodiment, the remaining situations of obstacle distribution are taken into consideration, that is, the obstacles are outside the cutting range of the two blades 220, such as Fig.12 If an obstacle exists in the middle or left edge of the cutting range of the left blade 220, if the relative distance between the two blades 220 is only increased to avoid the obstacle, the distance between the two blades 220 will be too large, and the range of grass that cannot be cut in the middle will be large, resulting in uneven mowing effect.

[0067] Therefore, in order to cover more ground area to the greatest extent and avoid obstacles to the minimum extent, there are two options according to the specific situation, such as Fig.12 In the embodiment, if the obstacle is close to the middle part of the cutting range of the left blade 220, the relative distance between the two blades 220 is enlarged, and the knife disc 410 is rotated clockwise by a certain angle as a whole, so that the two blades 220 are no longer horizontal, but are distributed in an oblique line.

[0068] If the obstacle is closer to the left edge of the cutting range of the left blade 220, the relative distance between the two blades 220 does not need to be increased. Instead, the blade disc 410 can be rotated counterclockwise by a certain angle as a whole to avoid the obstacle and cover the ground cutting range to the greatest extent.

[0069] Specifically, the cutter disc 410 itself is not fixed to the lower end of the chassis 120. Two slide bars 420 are symmetrically installed on the cutter disc 410, and slide in two second arc grooves 430 symmetrically opened at the lower end of the chassis 120. The two second arc grooves 430 are also arc grooves based on the central axis of the rotating shaft 320. After the cutter disc 410 rotates, the lengths of the two belts 350 remain unchanged, and the transmission of the rotating shaft 320 to the two cutter shafts 210 is not affected. A connecting plate 440 is also installed on the cutter disc 410, and the rotating shaft 320 is rotatably installed on the connecting plate 440, which can also play a role in limiting the rotation of the rotating shaft 320.

[0070] The second connecting shaft 620 is horizontally rotatably mounted at the lower end of the chassis 120, and the third connecting shaft 630 is also horizontally rotatably mounted on the side of the cutter head 410. By extending the piston rod of the second cylinder 610, the cutter head 410 can be pushed to rotate clockwise based on the rotating shaft 320, and by shortening the piston rod of the second cylinder 610, the cutter head 410 can be pushed to rotate counterclockwise based on the rotating shaft 320.

[0071] Embodiment 4: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 2-Figure 9 The mounting mechanism 400 further includes a discharge pipe 450 and a guide plate 460 disposed at the bottom of the blade disc 410 , and the bottom ends of the discharge pipe 450 and the guide plate 460 are located lower than the blade 220 .

[0072] In this embodiment, an inclined discharge pipe 450 and a guide plate 460 are installed on the left side of the blade disc 410. When encountering movable obstacles such as stones or branches on the ground, during the movement of the lawn mower body 100, some debris can be discharged through the guide plate 460 through the guidance of the discharge pipe 450, thereby playing a role in assisting obstacle avoidance.

[0073] Example 5: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 2-Figure 7 , a plurality of detection mechanisms 700 are provided on the lawn mower body 100, and the plurality of detection mechanisms 700 are arranged linearly;

[0074] The detection mechanism 700 includes a slider 710 disposed at the bottom of the chassis 120, a lifting rod 720 is slidably disposed on the slider 710, a pulley 730 is disposed on the lifting rod 720, and the slider 710 is elastically connected to the lifting rod 720 via a first spring 740;

[0075] When the lawn mower body 100 is moving, it is determined whether there is a raised terrain by detecting the rise and fall of the pulley 730;

[0076] The detection mechanism 700 further includes a horizontal slot 750 formed on the chassis 120, a slider 710 and a lifting rod 720 are slidably connected to the horizontal slot 750, and the slider 710 is elastically connected to the inner wall of the horizontal slot 750 via a second spring 780;

[0077] The chassis 120 is also provided with a vertical slot 760 that is connected to the horizontal slot 750 . The vertical slot 760 is adapted to the lifting rod 720 , and a sensor 770 is disposed in the vertical slot 760 .

[0078] In this embodiment, after the obstacle avoidance scheme is implemented, it is still necessary to detect obstacles. A row of detection mechanisms 700 is arranged on the left side of the chassis 120 along the front-rear direction. When the lawn mower body 100 moves to the left, the pulley 730 is close to the ground. When encountering obstacles such as stones, firstly, because the slider 710 is supported by the elastic force of the second spring 780 and is located at the left part of the horizontal groove 750, the lifting rod 720 is limited by the horizontal groove 750 and cannot be lifted or lowered.

[0079] The obstacle will first push the pulley 730, the lifting rod 720 and the slider 710 to move to the right. When the vertical slot 760 is reached, the lifting rod 720 is no longer limited by the horizontal slot 750, and the pulley 730 and the lifting rod 720 are pushed upward by the stone. At this time, the sensor 770 can be a contact sensor or a force sensor, which can detect the rise of the lifting rod 720 and determine the presence of an obstacle.

[0080] After the pulley 730 moves away from the obstacle, the lifting rod 720 will be reset and moved downward under the elastic action of the first spring 740, and then the slider 710 will be reset and moved to the left as a whole under the elastic action of the second spring 780.

[0081] The width of the obstacle in the front-to-back direction can be determined by how many pulleys 730 it touches and how many sensors 770 detect data. The length of the obstacle in the left-right direction can also be determined by how long the lifting rod 720 remains in the raised state after being pushed up by the obstacle.

[0082] By judging the width and length of the obstacle, the first adjustment mechanism 500 and the second adjustment mechanism 600 can be controlled to operate through a chip setting program built into the lawn mower body 100. As a conventional technical means, it will not be described in detail.

[0083] The height setting of the sensor 770 can be set at various positions within the upper and lower range of the vertical slot 760. If it is closer to the upper side, the lifting rod 720 will trigger the detection of the sensor 770 only when it encounters a sufficiently high obstacle. Therefore, the adjustment will not be triggered by some obstacles that will not touch the blade 220.

[0084] In addition, the lifting rod 720 does not rise directly due to the push of the obstacle, but moves horizontally first and then rises. The purpose is that the pulley 730 itself has a certain downward pressure. If the obstacle is a raised soil block, etc., before the lifting rod 720 reaches the vertical groove 760, the obstacle can be crushed and eliminated by the pulley 730, thereby eliminating the operation of the first adjustment mechanism 500 and the second adjustment mechanism 600.

[0085] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0086] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hand-push lawn mower, comprising a lawn mower body (100), characterized in that: The lawn mower body (100) is provided with a chassis (120), and a cutting mechanism (200) is mounted on the chassis (120) via a mounting mechanism (400); The mounting mechanism (400) comprises a knife disc (410) arranged at the bottom of the chassis (120), and the cutting mechanism (200) comprises two knife shafts (210) symmetrically arranged on the knife disc (410), and blades (220) are arranged on both knife shafts (210); The lawn mower body (100) is further provided with a driving mechanism (300) and a first adjusting mechanism (500); when the lawn mower body (100) moves along the ground, the driving mechanism (300) drives the two blades (220) to rotate to cut grass; and when the lawn mower body (100) passes over a raised terrain, the first adjusting mechanism (500) adjusts the relative distance between the two blades (220) to avoid obstacles; The first adjustment mechanism (500) comprises two first arc-shaped grooves (520) symmetrically arranged on the cutter disc (410), and a slide seat (510) is provided on each of the two cutter shafts (210), and the two slide seats (510) are respectively slidably connected in the two first arc-shaped grooves (520); A plurality of detection mechanisms (700) are arranged on the lawn mower body (100), and the plurality of detection mechanisms (700) are arranged in a linear manner; The detection mechanism (700) comprises a slider (710) arranged at the bottom of the chassis (120), a lifting rod (720) being slidably arranged on the slider (710), a pulley (730) being arranged on the lifting rod (720), and the slider (710) being elastically connected to the lifting rod (720) via a first spring (740); During the movement of the lawn mower body (100), determining whether there is a raised terrain by detecting the rise and fall of the pulley (730); The detection mechanism (700) further comprises a horizontal groove (750) formed on the chassis (120), the slider (710) and the lifting rod (720) being slidably connected to the horizontal groove (750), and the slider (710) being elastically connected to the inner wall of the horizontal groove (750) via a second spring (780); The chassis (120) is also provided with a vertical groove (760) which is in communication with the horizontal groove (750); the vertical groove (760) is adapted to the lifting rod (720); a sensor (770) is arranged in the vertical groove (760); the sensor (770) is used to detect the rise of the lifting rod (720).

2. A hand-push lawn mower according to claim 1, characterized in that: The cutter disc (410) is provided with a first cylinder (530), the first cylinder (530) is distributed along the perpendicular bisector of a line segment connecting the midpoints of the two cutter shafts (210), and a first connecting shaft (540) is provided on the piston rod of the first cylinder (530); The first adjustment mechanism (500) further comprises two connecting rods (550), one end of each of the two connecting rods (550) being rotatably disposed on the first connecting shaft (540), and the other ends of the two connecting rods (550) being rotatably disposed on the two knife shafts (210) respectively.

3. A push lawn mower according to claim 1, characterized in that: The driving mechanism (300) comprises an engine (310) arranged on the lawn mower body (100); a rotating shaft (320) is arranged on the output shaft of the engine (310); and the centers of the two first arc-shaped grooves (520) are both located on the central axis of the rotating shaft (320); Two first belt pulleys (330) are arranged on the rotating shaft (320), and second belt pulleys (340) are arranged on the two knife shafts (210). The two first belt pulleys (330) are respectively connected to the two second belt pulleys (340) through two belts (350).

4. A hand-push lawn mower according to claim 3, characterized in that: The mounting mechanism (400) further comprises two slide bars (420) symmetrically arranged on the blade disc (410); two second arc-shaped grooves (430) are symmetrically provided on the chassis (120); the centers of the two second arc-shaped grooves (430) are both located on the central axis of the rotating shaft (320); and the two slide bars (420) are respectively slidably connected in the two second arc-shaped grooves (430); The cutter disc (410) is also provided with a connecting plate (440), and the connecting plate (440) is rotatably connected to the rotating shaft (320).

5. A push lawn mower according to claim 1, characterized in that: The mounting mechanism (400) further comprises a discharge pipe (450) and a guide plate (460) arranged at the bottom of the blade disc (410); the bottom ends of the discharge pipe (450) and the guide plate (460) are located lower than the blade (220).

6. A push lawn mower according to claim 1, characterized in that: The lawn mower body (100) is also provided with a second adjustment mechanism (600), the second adjustment mechanism (600) being used to adjust the angle of the two blades (220) relative to the chassis (120); The second adjustment mechanism (600) comprises a second cylinder (610), and a second connecting shaft (620) and a third connecting shaft (630) are respectively provided at two ends of the second cylinder (610), the second connecting shaft (620) is rotatably connected to the chassis (120), and the third connecting shaft (630) is rotatably connected to the cutter disc (410).

7. A push lawn mower according to claim 1, characterized in that: Two bearings (560) are symmetrically arranged on the slide seat (510), and the knife shaft (210) is connected to the inner rings of the two bearings (560).

8. The hand-push lawn mower according to claim 1, characterized in that: The lawn mower body (100) is also provided with a collecting bag (110) and an armrest (130), and the collecting bag (110) is located at the rear of the lawn mower body (100).

Images