WO2020253794A1 - 自动割草机 - Google Patents

自动割草机 Download PDF

Info

Publication number
WO2020253794A1
WO2020253794A1 PCT/CN2020/096882 CN2020096882W WO2020253794A1 WO 2020253794 A1 WO2020253794 A1 WO 2020253794A1 CN 2020096882 W CN2020096882 W CN 2020096882W WO 2020253794 A1 WO2020253794 A1 WO 2020253794A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable
guard
lawn mower
cutting
protective wall
Prior art date
Application number
PCT/CN2020/096882
Other languages
English (en)
French (fr)
Inventor
赵凤丽
杜江
查霞红
王彪
周晓青
刘斌
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201921884636.1U external-priority patent/CN211531884U/zh
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to US17/621,169 priority Critical patent/US20220354050A1/en
Priority to EP20826655.1A priority patent/EP3987914A4/en
Publication of WO2020253794A1 publication Critical patent/WO2020253794A1/zh

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/006Control or measuring arrangements
    • A01D34/008Control or measuring arrangements for automated or remotely controlled operation
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/81Casings; Housings
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D75/00Accessories for harvesters or mowers
    • A01D75/20Devices for protecting men or animals

Definitions

  • the invention relates to an automatic lawn mower.
  • the automatic lawn mower automatically walks and cuts grass on the grass. It includes cutting elements for cutting. In order to prevent the cutting elements of the automatic lawn mower from accidentally injuring people’s fingers or arms, it is necessary to set up outside the cutting elements to block people’s fingers or arms.
  • the anti-protection piece meets the passability of the automatic lawn mower. The anti-protection piece cannot be set too low. Because the anti-protection piece is set too low from the ground, the passability of the automatic lawn mower will be poor; In the case of sex, the protective parts cannot prevent children's fingers and arms from reaching into the automatic lawn mower, which can easily cause children to be accidentally injured by the automatic lawn mower.
  • an automatic lawn mower which includes:
  • the moving module is arranged under the housing and used to drive the automatic lawn mower to move;
  • a cutting mechanism arranged in the housing to perform a cutting task with a predetermined cutting height, the cutting mechanism including a cutting element for cutting;
  • a control module for autonomously controlling the movement module to drive the automatic lawn mower to move, and autonomously controlling the cutting mechanism to perform cutting tasks
  • the automatic lawn mower further includes a protective assembly provided with a protective wall.
  • the protective wall is arranged on the outer side of the cutting mechanism, the protective assembly includes at least a movable protective member, and the protective wall is at least It includes a movable protection wall arranged on the movable protection piece and horizontally located outside of the cutting mechanism, the cutting mechanism is at any cutting height, and when the movable protection piece is in a position free from external force In the free state, the distance from the ground of the lower end of the movable protective wall is the initial distance, and the initial distance is always less than M, and 38mm ⁇ M ⁇ 40mm.
  • the movable guard can be compared with all under the action of external force.
  • the bottom shell moves in the up and down direction to change the distance of the lower end of the movable protective wall from the ground.
  • the cutting mechanism is at any cutting height, and the range of the initial distance is 15-35mm.
  • the cutting mechanism is at any cutting height, and the movable guard is under the action of external force, the movable guard can move upwards compared to the bottom shell, so that the movable guard wall When the external force is eliminated, the movable guard can move down compared to the bottom shell, so that the ground distance of the lower end of the movable guard wall returns to the Initial distance.
  • the cutting mechanism can move in the up and down direction compared to the movable guard.
  • the distance between the lower end of the movable protective wall and the ground always remains unchanged.
  • the resistance of the movable protection wall to the upward movement when the distance between the lower end of the movable protection wall and the ground is greater than a preset safe raising height of the grass, the resistance of the movable protection wall to the upward movement.
  • the resistance of the movable protection wall to move upward when the distance between the lower end of the movable protection wall and the ground is less than the preset grass safe lifting height, the resistance of the movable protection wall to move upward.
  • the movable protection wall includes a front movable protection wall arranged in front of the cutting mechanism, a rear movable protection wall arranged behind the cutting mechanism, and side edges arranged on both sides of the cutting mechanism At least one of the movable protective walls.
  • the range of the minimum distance X between the outermost edge of the movable protective wall and the cutting element is X ⁇ 58mm.
  • the movable protective wall includes a main movable portion, the main movable portion includes an obstacle passage area at its outermost edge, and the obstacle passage area includes an inclined surface extending downwardly from the outside to the inside.
  • the movable protective wall further includes a locking portion extending downwardly from the main movable portion, the locking portion includes a safety locking area located at its outermost edge, and the lower end of the safety locking area is at a distance from the ground. Less than M, the safety lock zone is located outside the downward extension line of the obstacle passage zone in the same radial direction.
  • the movable protective wall includes a plurality of blocking protrusions arranged at intervals in the circumferential direction at the bottom thereof, and the movable protective member is free from external force, and the lower end of the blocking protrusion is off the ground Greater than or equal to M/2.
  • the movable protective wall further includes an upper blocking portion connected above the blocking protrusion, the outermost edge of the blocking protrusion does not completely overlap the outer edge of the upper blocking portion, and the blocking protrusion The part that does not overlap with the outermost edge of the upper barrier is located inside the corresponding part of the outermost edge of the upper barrier.
  • the blocking protrusion includes a safety locking area located at the outermost edge thereof, the safety locking area includes an inclined surface and/or a vertical surface, when the safety locking area is an inclined slope extending downward from the outside to the inside.
  • the angle of inward inclination of the safety lock zone from the vertical plane where the outermost end of the safety lock zone is located is less than 15 degrees.
  • the range of the height h of the blocking protrusion is: 0mm ⁇ h ⁇ 80mm, or 3mm ⁇ h ⁇ 20mm; the range of the width M of the blocking protrusion is 0 ⁇ m ⁇ 40mm, or 0 ⁇ m ⁇ 20mm; the range of the distance S between two adjacent blocking protrusions is 0 ⁇ S ⁇ 40mm, or 3 ⁇ S ⁇ 25mm.
  • the movable protective wall further includes a connecting protrusion extending in the up and down direction connecting two adjacent blocking protrusions, and the connecting protrusion is partially recessed inward so that the connecting protrusion is connected to the two connecting protrusions.
  • the adjacent blocking protrusions jointly enclose an outer interval and a closed inner structure.
  • the range of the initial distance is always less than or equal to M/2.
  • the lower end of the blocking wall is always lower than the lowest point of the cutting element.
  • the protection assembly further includes a mechanism protection member that is fixed in a vertical direction compared with the cutting mechanism, and the mechanism protection member includes a horizontal direction located between the movable protection wall and the cutting mechanism.
  • the blocking wall further includes the mechanism protection wall, and the lower end of the mechanism protection wall is always lower than the lowest point of the cutting element.
  • the housing includes a high-position housing located outside the cutting mechanism in a horizontal direction, in a direction from the outside to the inside, and extending within a range of M in the direction perpendicular to the outside to the inside, the The distance between the high-mounted housing and the ground is always higher than M. In the horizontal direction, at least part of the mechanism protection wall is located between the high-mounted housing and the cutting mechanism.
  • the mechanism protection wall includes a front mechanism protection wall located in front of the cutting mechanism, side mechanism protection walls located on both sides of the cutting mechanism, and a rear mechanism protection wall located behind the cutting mechanism.
  • the front mechanism protection wall, the rear mechanism protection wall and the side mechanism protection wall jointly enclose the mechanism protection wall which is closed circumferentially.
  • the lowest point of the mechanism protection wall in the 360-degree circumferential direction is lower than the lowest point of the cutting element.
  • the minimum distance in the horizontal direction between the movable protective wall and the mechanism protective wall is 2-30 mm, or 2-8 mm.
  • the lower end of the movable protective wall is lower than the lowest point of the cutting element.
  • the lower end of the movable guard wall can move up and down compared to the cutting mechanism .
  • the automatic lawn mower further includes a limiting structure for limiting the relative movement of the movable guard and the cutting mechanism in the vertical direction.
  • the limiting mechanism includes a cutting limiting portion and a guard limiting portion capable of resisting and limiting each other, the cutting limiting portion and the cutting mechanism are relatively fixed in the up-down direction, and the protective limiting The position part and the movable guard are relatively fixed in the up-down direction, and when the cutting limit part and the guard abut against each other in position, the cutting limit part is located above the guard part.
  • the cutting mechanism when the cutting mechanism is subjected to an external force, the cutting mechanism can move up and down compared to the ground. At least one cutting height, when the movable guard In the process of upward movement by an external force, the movable guard first moves upward separately until it is mutually restricted with the cutting mechanism, and then moves upward together with the cutting mechanism.
  • the protection assembly further includes a cutting protection member that is fixed compared to the cutting mechanism in the vertical direction, and in the horizontal direction, the cutting protection member is arranged in the movable protection member, and the cutting protection The lower end of the piece is lower than the lowest point of the cutting element. In the non-elevating state, the cutting guard can move up and down compared with the bottom shell together with the cutting mechanism under the action of external force.
  • the cutting mechanism includes a cutter head for fixing the cutting element
  • the cutting guard includes a cutter head guard arranged below the cutter head and surrounding a middle cavity, the cutter head guard The lower end of the piece is lower than the lowest point of the cutting element.
  • the automatic lawn mower further includes a bendable flexible blocking member provided on the bottom side of the housing, and in the forward direction of the self-moving device, the blocking member is located on the front side of the moving module And/or on the rear side, the blocking member includes a shell end fixed to the bottom side of the shell, and a free end movable compared to the shell end under the action of an external force.
  • the moving modules are arranged at intervals, and the free ends can be in contact with the moving modules under the action of external force.
  • the automatic lawn mower further includes a cutter head for installing the cutting element, and the cutting element is arranged above the cutter head.
  • the distance between the lower end of the movable protective wall and the ground may be greater than or equal to M, Among them, 38mm ⁇ M ⁇ 40mm.
  • the range of the moving distance of the lower end of the movable protective wall in the up and down direction is 15-80 mm, or 20-40 mm.
  • the movable protective wall includes a grass pressing end surface located at the lower end thereof and continuously extending in the circumferential direction.
  • the movable protective wall includes a vertical protective wall extending in the up and down direction and a horizontal protective wall located below the vertical protective wall and extending in the horizontal direction.
  • the horizontal protective wall is at least one of the horizontal inner and outer directions. The side protrudes from the corresponding side of the vertical protective wall.
  • the automatic lawn mower further includes an upward guide mechanism for the protection piece for connecting the movable protection piece and the housing, and when the movable protection piece is subjected to a force from outside to inside, The protective member upward guiding mechanism allows the movable protective wall to move upward.
  • the upward guiding mechanism includes at least one of four connecting rods, two connecting rods, a single rod or a sliding groove.
  • the automatic lawn mower further includes a cutting upward guiding mechanism for connecting the cutting mechanism and the housing.
  • the movable guard includes an upper guard and a lower guard.
  • the lower guard When the lower guard is subjected to an external force, the lower guard can move in an up-and-down direction compared to the upper guard.
  • the movable guard is arranged outside the housing, and/or arranged between the cutting mechanism and the housing and/or connected to a part of the housing.
  • the movable protection wall includes a front movable protection wall arranged in front of the cutting mechanism, and the protection assembly further includes a rear movable protection piece provided with a rear movable protection wall, and the rear movable protection The wall is arranged behind the cutting mechanism, and when the rear movable guard is subjected to an external force, the lower end of the rear movable guard wall can produce a relative displacement in the up and down direction compared with the ground.
  • the movable guard and the rear movable guard can move relatively independently.
  • the rear movable guard includes a baffle with one end fixed to the housing, and the baffle includes a fixed end fixed to the housing and a movable end that can be rotated around the fixed end by an external force .
  • the front movable guard when the front movable guard receives a vertical upward force, the front movable guard can move up and down; and when the rear movable guard receives a vertical upward force At this time, the rear movable guard cannot move up and down.
  • the movable protection wall further includes side movable protection walls arranged on both sides of the automatic lawn mower, and the front movable protection wall and the side movable protection wall are connected to each other to make The side movable protective wall and the front movable protective wall can move in up and down directions synchronously when subjected to external force.
  • the beneficial effect of this solution is that by providing a protective component with a protective wall, the passability of the automatic lawn mower can be ensured while preventing children's fingers and arms from being accidentally injured.
  • Fig. 1 is a perspective view of an automatic lawn mower according to an embodiment of the present invention.
  • Fig. 2 is another angle view of the automatic lawn mower shown in Fig. 1.
  • Figure 3 is another angle view of the automatic lawn mower shown in Figure 1.
  • Fig. 4 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 5 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 7 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 8 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 9 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 10 is a schematic diagram of the cutting mechanism and the protective assembly of the automatic lawn mower in an embodiment of the present invention on one side.
  • Fig. 11 is a schematic diagram of a cutting mechanism and a movable guard of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 12 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 13 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 14 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 15 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 16 is a schematic diagram of a protective assembly of an automatic lawn mower in an embodiment of the present invention.
  • Figure 17 is a schematic diagram of a protective assembly of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 18 is a schematic diagram of a protective assembly of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 19 is a schematic diagram of a protective assembly of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 20 is a schematic diagram of a protective assembly of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 21 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 22 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 21.
  • Fig. 23 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 21.
  • Fig. 24 is a schematic diagram of a state of the protective assembly of the automatic lawn mower in an embodiment of the present invention.
  • Fig. 25 is another angle view shown in Fig. 24.
  • Fig. 26 is a schematic diagram of the outermost edge of the movable guard in an embodiment of the present invention.
  • Figure 27 is a schematic diagram of an automatic lawn mower according to an embodiment of the present invention.
  • Fig. 28 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 27.
  • Fig. 29 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 27.
  • Fig. 30 is a schematic diagram of an automatic lawn mower according to an embodiment of the present invention.
  • Fig. 31 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 30.
  • Fig. 32 is a schematic diagram of another state of the automatic lawn mower shown in Fig. 30;
  • Figure 33 is a schematic diagram of an automatic lawn mower according to an embodiment of the present invention.
  • Fig. 34 is a schematic view of the automatic lawn mower shown in Fig. 33 being raised.
  • Fig. 34 is a schematic view of the automatic lawn mower shown in Fig. 33 being raised.
  • Figure 35 is a schematic diagram of a movable guard in an embodiment of the present invention.
  • Figure 36 is a schematic diagram of an automatic lawn mower in an embodiment of the invention.
  • Fig. 37 is a schematic diagram of a state of the movable guard shown in Fig. 36.
  • Fig. 38 is a schematic bottom view of the automatic lawn mower shown in Fig. 36;
  • Fig. 39 is a schematic structural diagram of the movable guard in Fig. 36.
  • Fig. 40 is a schematic diagram of another structure of the movable guard in Fig. 36.
  • Fig. 41 is a schematic diagram of another arrangement of the movable guard shown in Fig. 36 in the automatic lawn mower.
  • Fig. 42 is a schematic diagram of another arrangement of the movable guard shown in Fig. 36 in the automatic lawn mower.
  • Fig. 43 is a schematic diagram of a movable guard and a mechanism guard in an embodiment of the present invention.
  • Fig. 44 is a schematic diagram of the force when the movable guard shown in Fig. 43 is subjected to an illegal external force.
  • FIG. 45 is a schematic diagram of the force when the movable guard shown in FIG. 43 is subjected to an illegal external force.
  • Figure 46 is a schematic diagram of a movable guard with blocking protrusions and a mechanism guard in an embodiment of the present invention.
  • Fig. 47 is a schematic diagram of the force exerted by the movable guard shown in Fig. 46 when subjected to an illegal external force.
  • Fig. 48 is a schematic diagram of the force exerted by the movable guard shown in Fig. 46 when subjected to an illegal external force.
  • Fig. 49 is a schematic diagram of the force of the movable guard shown in Fig. 46 when the distance from the ground to the ground is less than or equal to M/2, when it is subjected to an illegal external force.
  • Fig. 50 is a schematic diagram of the force of the movable guard shown in Fig. 46 when the distance from the ground is less than or equal to M/2 when it is subjected to an illegal external force.
  • Figure 51 is a schematic diagram of a movable guard with a connecting protrusion and a mechanism guard in an embodiment of the present invention.
  • 52 to 54 are schematic diagrams of the state of the grass when the movable guard shown in FIG. 51 encounters grass.
  • Fig. 55 is a partial enlarged view of Fig. 51.
  • Figure 56 is a schematic diagram of a movable guard with a connecting protrusion and a mechanism guard in another embodiment of the present invention.
  • Fig. 57 is a schematic diagram of a single-wheel crushing child arm of an automatic lawn mower in an embodiment of the present invention.
  • Fig. 58 is a schematic diagram of an automatic lawn mower having a blocking member in an embodiment of the present invention.
  • Fig. 59 is a schematic diagram of an automatic lawn mower with a cutter head guard under the cutter head in an embodiment of the present invention.
  • Fig. 60 is a schematic diagram of an automatic lawn mower in an embodiment of the invention.
  • Fig. 61 is a plan view of the automatic lawn mower shown in Fig. 60.
  • the present invention provides an automatic working system, which includes an automatic lawn mower 1 that moves and works autonomously and a charging station for charging the automatic lawn mower 1.
  • the automatic lawn mower 1 includes a housing 10 provided with a bottom shell 101, a moving module 20 arranged under the housing 10 and used to drive the automatic lawn mower 1 to move, and a cutting mechanism 3 for performing cutting tasks with a predetermined cutting height ,
  • the cutting mechanism 3 is rotatably fixed under the housing 10.
  • the cutting mechanism 3 includes a cutter head 31 rotatably fixed under the housing 10, a number of cutting elements 32 fixed on the cutter head 31, and fixing the cutting elements 32
  • the cutting mechanism 3 further includes a rotating part 36 rotatably fixed below the housing 10, and the cutter head 31 is fixed on the rotating part 36 and can rotate with the rotating part 36 .
  • the cutting element 32 is a cutting blade, and the cutting blade is evenly fixed on the circumference of the cutter head 31 to rotate together with the cutter head 31.
  • the cutting mechanism 3 includes three cutting blades. In other embodiments, the number of cutting blades may be determined according to actual conditions. For example, there are two or more cutting elements.
  • the automatic lawn mower 1 further includes a height adjustment structure 6 for adjusting the height of the cutting mechanism.
  • the height adjustment mechanism 6 is operated. Under the drive of the height adjustment structure 6, the cutting mechanism 3 can move up and down to adjust the height of the cutting mechanism 3 and adjust the cutting grass height. In the process of adjusting the cutting height from the lowest gear to the highest gear, the cutting mechanism 3 can move in the vertical direction compared with the movable guard.
  • the cutting mechanism 3 moves in the vertical direction compared with the housing 10, cutting
  • the mechanism 3 moves up and down compared to the ground, and the movable guard 41 does not move up and down compared to the ground, that is, the initial distance between the lower end of the movable protection wall and the ground remains unchanged.
  • the lowest state 411 of the movable guard 41 remains unchanged, so that the height adjustment does not affect the safety protection effect of the automatic lawn mower 1.
  • the initial distance between the lower end of the movable protective wall and the ground always remains unchanged; in other embodiments, part of the gear adjustment process is also possible In the middle, the initial distance between the lower end of the movable protective wall and the ground remains unchanged, while the initial distance between the lower end of the movable protective wall and the ground changes during the process of part of the gear adjustment.
  • the automatic lawn mower 1 can also adjust the distance between the cutting element 32 and the ground by reversely installing the cutter head 31 up and down or replacing the new cutter head 31 to achieve the purpose of adjusting the cutting height.
  • the movable guard 41 When adjusting the cutting height, the movable guard 41 is not changed, that is, the positional relationship between the movable guard 41 and the housing 10 remains unchanged, and the cutter head 31 is directly exchanged.
  • the height of the cutting mechanism 3 compared to the ground can also be fixed at all times, and cannot be adjusted.
  • the cutting mechanism 3 can be set to be fixed compared to the housing, or set to be movable compared to the housing.
  • the cutting mechanism 3 can move up and down compared to the housing.
  • an external force acts under the cutting mechanism 3
  • the cutting mechanism 3 Compared with the housing, it can move upwards to avoid obstacles, avoid obstacles to collide with the blade, and improve passability.
  • the automatic lawn mower 1 also includes a protective assembly 4 of a protective wall 40 for safety protection.
  • the protective wall is arranged on the outside of the cutting mechanism 3 to prevent people from moving from outside to inside.
  • the cutting mechanism 3 is accidentally touched to cause accidental injury to people.
  • the protection assembly 4 at least includes a movable protection piece 41 provided with a movable protection wall 414 for safety protection.
  • the protection wall includes at least a movable protection piece provided on the movable protection piece 41 and located outside the cutting mechanism 3 in the horizontal direction. ⁇ 414.
  • the distance between the lower end of the movable protective wall 414 and the ground in the vertical direction can be changed, so that when the automatic lawn mower 1 When encountering an obstacle 62, the movable protective wall 414 is subjected to sufficient external force, and the distance between the lower end 417 of the movable protective wall of the movable protective member 41 and the ground can be increased, so as to quickly pass the obstacle, thereby enhancing the automatic mowing The passability of machine 1.
  • the lower end of the movable protective wall 414 can also be referred to as the lower end 417 of the movable protective wall.
  • the maximum value M of the child’s arm diameter is preset, no matter what cutting height the cutting mechanism 3 is at, or in other words, the cutting mechanism 3 is at any cutting height, when the protection assembly 4 is in a free state without external force, the lower end of the protection assembly 4
  • the distance from the ground is the initial distance.
  • the initial distance is always less than M to prevent the child's arm from reaching the vicinity of the cutting mechanism 3 in the automatic lawn mower 1 through the bottom of the movable guard 4, which may cause the cutting mechanism 3 to be cut. Risk of accidental injury.
  • the maximum diameter of a child's arm M ranges from 38mm-40mm (including 38mm and 40mm), that is, 38mm ⁇ M ⁇ 40mm.
  • the distance between the lower end of the protective component 4 and the ground can be set to 15mm, 19m, 25mm, 35mm, 37mm, 39mm and so on.
  • the free state of the protective assembly 4 above means that no matter what cutting height the cutting mechanism 3 is at, the automatic lawn mower 1 is not affected by anything. The state of the protection component 4 when an external force acts.
  • the protective assembly 4 When the protective assembly 4 is in a free state, when an arm with a diameter greater than M tries to extend into the automatic lawn mower 1 from below the movable guard 41, it is blocked by the lower end of the protective assembly 4 and cannot extend the arm into the movable guard Within piece 41.
  • the distance between the lower end of the protective component 4 and the ground is within the range of 15 to 35 mm, so that the distance between the lower end of the protective component 4 and the ground can prevent children’s arms from reaching in, and prevent the protective component 4 from being too close to the ground. And affect its normal walking on the grass.
  • the distance between the lower end 417 of the movable protection wall of the movable protection piece 41 and the ground can be changed.
  • the movable protection piece 41 can move up and down compared to the bottom shell to change the height of the movable protection wall.
  • the ground distance is variable.
  • the distance between the lower end 417 of the movable protective wall and the ground can be generated by rotation or deformation.
  • the bottom shell of the housing 10 does not move in the up and down direction compared to the ground, and the movable guard 41 can pass through the bottom shell of the housing 10. Move up and down to achieve the up and down movement compared to the ground.
  • the movable guard 41 is provided between the housing 10 and the cutting mechanism 3, independently of the housing 10, or as shown in Figs. 16 to 17, movable The guard 41 is disposed outside the housing 10, and the movable guard 41 can move in the up and down direction compared to the bottom shell of the housing 10.
  • the movable guard 41 can be completely covered outside the housing 10 as shown in Figures 16 to 17 to form the upper cover of the automatic lawn mower 1, or the movable guard 41 can be arranged on the housing as shown in Figure 18 A part of the upper portion of 10 is, for example, provided at the front, rear, and side edges of the housing 10.
  • the movable guard 41 can be fixed compared to the housing, and the distance of the housing 10 from the ground can be changed. For example, the connection form between the mobile module and the housing 10 is changed, so that the housing 10 Compared to the ground distance change, etc.
  • the distance between the upper end of the movable guard 41 and the ground remains unchanged, and the movable guard 41 deforms when it touches an obstacle, to achieve The distance between the lower end 417 of the movable protective wall and the ground changes.
  • FIGS. 19 to 20 the distance between the upper end of the movable guard 41 and the ground remains unchanged, and the movable guard 41 deforms when it touches an obstacle, to achieve The distance between the lower end 417 of the movable protective wall and the ground changes.
  • the upper end of the movable guard 41 is at a constant distance from the ground, and the upper end of the movable guard 41 is fixed compared to the housing 10, and the movable guard 41 41 rotates around its upper end to realize that the distance between the lower end 417 of the movable protective wall and the ground changes.
  • the movable guard 41 can also adopt other methods to realize that the lower end 417 of the movable guard wall has a variable distance from the ground, which will not be listed in this application.
  • the cutting element 32 includes the lowest point 30 of the cutting element located at its lowest position in the up and down direction. Regardless of the cutting height of the cutting mechanism 3, when the automatic lawn mower 1 is moving, when it encounters a child's arm, such as the test arm 61 with a diameter of M in Figure 8, the test arm 61 is equivalent to The obstacle 62 exerts enough force on the movable protection wall 414 to move the movable protection wall 414 upward.
  • the movable protective wall 414 When the movable protective wall 414 receives an external force and its lower end moves upward, if the lower end of the protective component 4 can be greater than or equal to M from the ground, for example, the distance between the lower end 417 of the movable protective wall and the ground can be greater than or equal to M, and the protective component 4 When the lower end of the mower moves higher than the lowest point 30 of the cutting element, when the automatic lawn mower 1 encounters a child’s arm during the movement, it will be directly crushed, and the arm can directly enter the vicinity of the cutting mechanism 3 through the protective assembly 4, It is cut by the cutting element 32.
  • the lower end 417 of the movable protective wall can be restricted from the ground.
  • the distance between the lower end of the barrier wall 40 of the protective assembly 4 and the ground is always less than M.
  • the distance between the lower end 417 of the movable protective wall and the ground is always less than M to restrict the arm from being unable to move freely.
  • the cutting mechanism 3 extends below the protective assembly 4.
  • the test arm 61 can only be located under the cutting element 30.
  • the cutting height is higher than the diameter of the child's arm.
  • the height of the cutting mechanism 3 from the ground is greater than the diameter of the child's arm.
  • the cutting mechanism 3 also includes a cutter head guard 35 arranged at its lower end.
  • the lower end of the cutter head guard 35 is a smooth surface to ensure that when the child's arm reaches into the lower part of the cutting mechanism 3, it touches smoothly s surface. In particular, when the automatic lawn mower is tilted, the cutting element 32 is inclined accordingly, and the child's arm is blocked by the cutter head guard 35, so that the cutting element 32 can be avoided.
  • the cutting element 32 is arranged above the cutter head 31, and the cutting mechanism 3 further includes a fastener 33 for fixing the cutting element 32 to the cutter head 31.
  • the cutting element 32 is fixed above the cutter head 31 from top to bottom.
  • the cutting mechanism 3 includes a fixing member 34 for fixing the cutter head 31 to the rotating part 36 and a cutter head guard 35 assembled under the cutter head 31.
  • the lower end of the knife head guard 35 has a smooth surface.
  • the cutter head guard 35 and the knife There is a receiving space 37 between the disks 31 for accommodating the fixing member 34.
  • the fixing member 34 fixes the cutter head 31 on the rotating part 36 from bottom to top.
  • the fixing member 34 is accommodated in the receiving space 37 to prevent the fixing member 34 from being exposed to cutting.
  • the cutter head 31 includes a blade mounting portion 315 for mutual assembly with the cutting element 32, a rotary mounting portion 316 located in the middle of the blade mounting portion and for mutual assembly with the rotating portion 36, and for connecting the blade mounting
  • the part 315 is connected to the cutter head connecting part 317 of the rotating mounting part 316.
  • the height of the rotating mounting part 316 is higher than the height of the blade mounting part 315, and the rotating mounting part 316, the cutter head connecting part 317 and the cutter head guard 35 enclose a receiving space 37.
  • the cutter head 31 and the cutter head guard 35 are respectively provided with a fixed connection structure 312 fixedly connected to each other.
  • the fixed connection structure 312 includes a first buckle structure 313 and a second buckle structure 314 that buckle with each other.
  • the first buckle structure 313 The second buckle structure 314 and the cutter head connecting portion 317 are respectively disposed on the cutter head guard 35.
  • the lower end of the cutter head guard 35 and the lower end of the cutter head 31 may be on the same plane, so that the lower end of the cutting mechanism 3 is a complete plane, so that the bottom of the cutting mechanism 3 is smoother and the safety protection effect is better.
  • the cutter head guard 35 and the cutter head 31 may not be in the same plane, and only the cutter head guard 35 or the lower end of the cutter head 31 is used as the lower end of the cutting mechanism 3. As long as the cutter head guard 35 The lower end of the cutter head 31 has a smooth surface.
  • the cutting guard 305 is arranged in the movable guard in the horizontal direction of the automatic lawn mower, and the lower end of the cutting guard is lower than the cutting guard.
  • the lowest point of the component As shown in FIG. 57, the cutting guard 305 may be a mechanism guard 42 provided in the movable guard as shown in FIG. 57.
  • the cutting guard can also take other forms, such as:
  • the cutting guard 305 includes a cutter head guard 35 with a smooth bottom assembled under the cutting mechanism 3, and a receiving fastener 33 is provided between the knife head 31 and the cutting mechanism 3.
  • the cutting element 32 is partially received in the receiving cavity 39.
  • the cutter head guard 35 is assembled below the cutting mechanism 3 as an example.
  • the cutter head guard 35 and the cutting mechanism 3 may be partially integrally formed, for example, directly extending partially from the cutting mechanism 3. form.
  • the cutting guard 305 includes a cutter head guard 35 that is disposed on the cutter head 31 and protrudes downward from the surface of the cutter head 31.
  • the lower end of the cutter head guard 35 is lower than the lowest point of the cutting element 32.
  • the cutting element 32 can rotate around its own axis to form a self-rotating area.
  • the cutter head guard 35 The extension line of the connecting line between the lowest point and the lowest point of the higher driving wheel of the two driving wheels does not intersect the spin area where the cutting element rotates to any position relative to the axis of rotation; the predetermined angle is 30- Take a value within 60 degrees.
  • the predetermined angle is within the range of 30-60 degrees.
  • the cutter head 31 has a lower surface facing downward; the cutting element 32 is rotatably mounted on the lower surface and can extend beyond the outer edge of the cutter head 31; the cutter head guard 35 is provided on the lower surface of the cutter head 31 or from the cutter head 31
  • the lower surface of the cutting element is convex downward; the maximum outer diameter of the cutter head guard 35 is smaller than the maximum outer diameter of the cutting element 32.
  • the cutter head guard 35 is arranged around a middle cavity 350, and the middle cavity 350 forms an opening facing downward at the lower end of the cutter head guard 35.
  • the cutter head guard 35 can be a hollow ring structure arranged under the cutter head 31 as shown in FIG. 59.
  • the hollow ring can directly protrude downward from the lower surface of the cutter head 31, or it can be assembled with separate parts
  • the cut grass enters the middle cavity 350. Since the middle cavity 350 has an opening facing downwards, the grass will not be siltated in the protruding part to ensure smooth rotation of the cutter head.
  • the cutter head guard 35 and the cutter head 31 are coaxially arranged; the lower end surface of the cutter head guard 35 is a circular ring-shaped plane. Furthermore, regardless of whether the cutter head 31 is tilted toward any side, the cutter head guard 35 can separate the cutting element 321 from the child arm, thereby having a better cut prevention effect.
  • the cutter head guard 35 may also have other structures, for example, a plurality of arcs, columns, or other shapes arranged around the middle cavity 350 at intervals.
  • the height range of the cutter head guard 35 downward beyond the cutting element is 2-30 mm.
  • the cutter head guard 35 in the above embodiment can also be directly referred to as the cutting guard 305.
  • the child arm in order to further prevent the automatic lawn mower 1 from tilting, the child arm may extend into the cutting mechanism 3.
  • the cutting guard 305 and the cutting mechanism are fixed to each other in the vertical direction, and in the non-elevating state, the cutting Under the action of external force, the guard can move up and down with the cutting mechanism 3 compared to the bottom shell, so that as shown in FIG. 59, when the child arm extends into the movable guard 41, the cutting guard 305 is affected by children.
  • the force exerted by the arm drives the cutting mechanism 3 to move upward together to further prevent the child arm from touching the cutting element.
  • the cutting guard 305 and the cutting mechanism 3 can be lowered with a delay, for example, stay at the apex for a certain time, and then lower to Return to the original position to avoid falling too fast, and the cutting mechanism will fall before the automatic lawn mower has passed the child arm, causing accidental injury to the child arm.
  • the automatic lawn mower can be implemented by setting a delay mechanism for controlling the reset speed of the cutting mechanism 3, and the delay mechanism can be a damping device or an electromagnet.
  • the movable protection member 41 may be moved upward under force. The upward movement of the movable guard 41 is restricted, so that the lower end 417 of the movable guard wall is always located at the lowest point 30 of the cutting element.
  • the movable guard 41 and the cutting mechanism 3 can be synchronized and movable, so that the lower end 417 of the movable guard wall is at a constant distance from the lowest point 30 of the cutting element, so that the lower end 417 of the movable guard wall is always located at The lowest point of the cutting element 30.
  • the protection assembly 4 further includes a mechanism protection member 42 provided with a mechanism protection wall 424.
  • the mechanism protection wall 424 of the automatic lawn mower is arranged between the cutting mechanism 3 and the movable protection wall.
  • the protective wall 40 includes a movable protective wall and a mechanism protective wall 424.
  • the mechanism guard 42 is fixed compared to the cutting mechanism 3, wherein the cutting mechanism 3 can move or not move compared to the housing according to the situation. When the cutting structure 3 moves compared to the housing, the mechanism guard 42 moves together. When the cutting mechanism 2 does not move compared to the housing, the mechanism guard 42 also does not move.
  • the mechanism guard 42 is completely fixed compared to the cutting mechanism 3 and cannot move in any direction.
  • the mechanism guard 42 can also only be compared with the cutting mechanism in the up and down direction. 3 It is enough to be fixed, and the two can move relative to each other in directions other than the vertical direction.
  • the mechanism guard 42 includes a mechanism guard wall 424 for protection, and the cutting mechanism 3 includes the lowest point 30 of the cutting element at its lowest position in the vertical direction.
  • the mechanism guard 42 is fixed compared to the cutting mechanism 3, that is, in the up and down direction, the relative position of the mechanism guard 42 and the cutting mechanism 3 is unchanged.
  • the lower end of the mechanism protection wall 424 of the mechanism protection member 42 that is, the lower end 427 of the mechanism protection wall is always lower than the lowest point 30 of the cutting element, so as to ensure that the lower end of the protection wall 40 is always lower than the lowest point 30 of the cutting element to prevent children's arms from being Automatic lawn mower 1 rolling.
  • the mechanism guard 42 is located between the cutting mechanism 3 and the movable guard 41, and the minimum distance between the movable guard 41 and the mechanism guard 42 in the horizontal direction is 2 ⁇ 30mm, so that the movable guard 41 does not interfere with the mechanism guard 42 during the upward movement.
  • the minimum distance between the movable guard 41 and the mechanism guard 42 is 2-8mm.
  • the mechanism guard 42 includes a mechanism guard wall 424 and a fixed connection wall 425 for connecting the mechanism guard wall 424 and the housing 10. In the vertical direction, the mechanism guard wall 424 is fixed compared to the cutter head 31, that is, the mechanism guard wall The relative position of 424 and cutter head 31 in the up-down direction is unchanged.
  • the mechanism protection wall 424 includes a plurality of fixed protection teeth 4246, a plurality of fixed grass inlets 4247 located between two adjacent fixed protection teeth 4246, and a connecting portion 4248 for connecting the adjacent fixed protection teeth 4246.
  • the width of the fixed grass inlet 4247 is 1 ⁇ M
  • the width of the fixed protective teeth 4246 is 1 ⁇ 20mm.
  • the grass While the grass can enter, it prevents children’s arms from passing through the mechanism guard 41 through the fixed grass inlet 4247 and touching To the cutting mechanism 3. Because the fixed grass inlet 4247 is too wide, the effective length of the fixed protection tooth 4246 will be reduced. In one embodiment, the width of the fixed grass inlet 4247 is 10-25 mm, which ensures the effective length of the fixed protection tooth 4246. This prevents children’s arms from passing through the mechanism guard 42 through the fixed grass inlet 4247, so that when the automatic lawn mower 1 moves, the amount of grass entering the cutting mechanism 3 through the fixed grass inlet 4247 is appropriate to avoid The amount of grass entering is too small, resulting in low work efficiency or blocking grass.
  • the width of the fixed protection tooth 4146 is 4-10 mm, which improves the rigidity of the fixed protection tooth 4246 while avoiding the excessive width of the fixed protection tooth 4246, which may cause grass blocking.
  • the movable guard 41 also includes a plurality of movable guard teeth 4146, a plurality of fixed grass inlets 4147 located between two adjacent movable guard teeth 4146, and is used to connect adjacent movable guards.
  • the connecting part 4148 of the tooth 4146 is in the forward direction of the automatic lawn mower 1. Enter the grass entrance 4247 to avoid jams.
  • the fixed protection teeth 4246 and the movable protection teeth 4146 are respectively distributed on the outer side of the cutting mechanism 3 along the circumference to form a safety protection on the outer side of the cutting mechanism 3.
  • the mechanism protection wall 424 includes a front mechanism protection wall 4241 located in front of the cutting mechanism 3, side mechanism protection walls 4243 located on both sides of the cutting mechanism, and The rear mechanism protection wall 4242 is located behind the cutting mechanism.
  • the lower end 427 of the front mechanism protection wall 4241, the rear mechanism protection wall 4242, and the side mechanism protection wall 4243 are all lower than the lowest point 30 of the cutting element.
  • a mechanism protection wall can be arranged around the mechanism guard 42, that is, as shown in FIGS. 24 and 25, in the automatic In the forward direction of the lawn mower 1, the front mechanism protection wall 4241, the rear mechanism protection wall 4242, and the side mechanism protection wall 4243 jointly enclose a circumferentially closed mechanism protection wall.
  • the front mechanism protection wall 4241, the rear mechanism protection wall 4242 and The lower ends of the side mechanism protection wall 4243 are all lower than the lowest point 30 of the cutting element.
  • the bottom end of the mechanism protection wall in the 360-degree circumferential direction is lower than the lowest point 30 of the cutting element.
  • the bottom of the protective wall in the 360-degree circumferential direction may be at least partly higher than the lowest point of the cutting element, at least partly lower than the lowest point of the cutting element, and the part higher than the lowest point of the cutting element is in the circumference.
  • the length of the upward continuous extension is less than M to prevent the child's arm from reaching in.
  • the mechanism protection wall 424 includes at least one of a front mechanism protection wall 4241 located in front of the cutting mechanism 3, side mechanism protection walls 4243 located on both sides of the cutting mechanism, and a rear mechanism protection wall 4242 located behind the cutting mechanism. .
  • the mechanism protection wall 424 includes at least one of a front mechanism protection wall 4241 located in front of the cutting mechanism 3 and a side mechanism protection wall 4243 located on both sides of the cutting mechanism to prevent children from arms. Extending from the front or back into the vicinity of the cutting mechanism 3, and was cut.
  • the direction of the external force applied is the same as when the automatic lawn mower 1 moves forward, the obstacle 62 is compared with the movement direction of the automatic lawn mower 1 (From the inside to the outside) On the contrary, the force from the outside to the inside can be distinguished from the obstacle 62.
  • the rear of the automatic lawn mower 1 can restrict the movable protective wall 414 from the resistance when moving from the outside to the inside to prevent automatic cutting.
  • the lower end 417 of the movable protective wall behind the lawn mower 1 moves upward or prevents it from moving upward beyond the lowest point 30 of the cutting element to prevent injury to the child's arm. Since the direction of the force applied from outside to inside of the automatic lawn mower 1 is the same as that of the obstacle 62 compared to the movement of the automatic lawn mower 1, the direction of the force applied from outside to inside and outside on both sides is also compared with the obstacle 62 Since the direction of movement of the automatic lawn mower 1 is not completely opposite, the force from the outside to the inside cannot be distinguished from the obstacle 62. Therefore, in this embodiment, the front and both sides of the automatic lawn mower 1 can be equipped with front mechanism protective walls 4241 and/or side protection wall 4243.
  • the housing 10 includes a high-position housing 49 located outside the cutting mechanism 3 in the horizontal direction, in the direction from the outside to the inside (in the horizontal direction), and in the vertical direction from the outside to the inside.
  • the distance between the high housing 49 and the ground is always higher than M. Therefore, the child arm can pass under the high housing 49 to reach the vicinity of the cutting element 32 and be cut. Therefore, in the horizontal direction,
  • at least part of the mechanism protection wall 424 is located between the high-position housing 49 and the cutting mechanism 3 to prevent the child arm from reaching the vicinity of the cutting element 32 from below the high-position housing 49 and being cut. hurt.
  • different implementations can also be selected according to the movement mode of the movable guard 41 to realize that the lower end of the guard assembly 4 is always lower than the lowest point 30 of the cutting element.
  • the movable guard 41 can move up and down compared to the bottom shell of the housing 10 under the action of external force to change the ground distance of the lower end of the movable guard wall as an example for specific description.
  • the movable guard 41 includes a number of movable guard walls 414 for blocking the user's arms, fingers or other foreign objects, and movable connecting walls for connecting the movable guard wall and the housing 415 in.
  • the movable protective wall 414 includes a front movable protective wall 4141 arranged in front of the cutting mechanism 3, side movable protective walls 4142 arranged on both sides of the cutting mechanism 3, and a rear movable protective wall 4143 arranged behind the cutting mechanism 3 at least one.
  • the movable protection wall 414 includes a front movable protection wall 4141, a side movable protection wall 4142, and a rear movable protection wall 4143 as an example.
  • the front movable protective wall 4141, the side protective movable protective wall 4142, and the rear movable protective wall 4143 can be connected to each other in whole or in part, and then connected to the housing 10 through the movable connecting wall 415, and the front movable protection
  • the wall 4141, the side movable protective wall 4142 and the rear movable protective wall 4143 may not be connected to each other, but are connected to the housing 10 through the movable connecting wall 415, respectively.
  • the front movable protective wall 4141, the lateral movable protective wall 4142, and the rear movable protective wall 4143 may be formed by directly extending from the movable connecting wall 415, or may be formed separately and then assembled on the movable connecting wall 415.
  • the movable protection wall 414 includes a plurality of movable protection teeth 4146 and a plurality of movable grass inlets 4147 located between two adjacent movable protection teeth 4146. As shown in Figure 1, in one embodiment, only the front movable protective wall 4141 is provided with a number of movable protective teeth 4146 and a movable grass inlet 4147, so that when the automatic lawn mower 1 moves forward, the grass can It enters the cutting mechanism 3 through the movable grass inlet 4147 without being blocked by the movable protective teeth 4146. In other embodiments, the rear movable protective wall 4143 and the side movable protective wall 4142 can also be provided with a number of movable grass inlets 4147 correspondingly to prevent grass from pressing.
  • the width of the movable grass inlet 4147 is 1 ⁇ M, and the width of the movable protective teeth 4146 is 1 ⁇ 20mm. While the grass can be entered, children’s arms are prevented from passing through the movable guard 41 through the movable grass inlet 4147. , While touching the cutting mechanism 3. Because the movable grass inlet 4147 is too wide, the effective length of the movable protective tooth 4146 will be reduced. In one embodiment, the width of the movable grass inlet 4147 is 10-25mm, which ensures the length of the movable protective tooth 4146.
  • the width of the movable protection tooth 4146 is 4-10 mm, which improves the rigidity of the movable protection tooth 4146 and prevents the width of the movable protection tooth 4146 from being too large, which may cause grass blocking.
  • the movable guard 41 is movable compared to the bottom shell 101 of the housing 10, and the movable guard wall 414 is also movable compared to the bottom shell of the housing 10, so that when the automatic lawn mower 1 encounters When reaching an obstacle 62 within a certain range, the movable protection wall 414 of the movable protection member 41 can move upward to avoid the obstacle 62, thereby ensuring better passability of the automatic lawn mower.
  • the movable guard 41 can move upwards compared to the bottom shell 101 as a whole under the external force exerted by obstacles, etc., so that the ground distance of all points on the lower surface of the movable guard wall is increased.
  • the movable guard 41 has a lowest state 411 and a highest state 412 within the movable range.
  • the lowest state 411 means that the movable guard 41 is at the lowest position in the movable space in the vertical direction during the movement of the automatic lawn mower.
  • Position, the highest state 412 refers to the highest position in the movable space of the automatic lawn mower in the up and down direction during the movement.
  • both the lowest position and the highest position refer to the movable range of the movable guard 41 caused by the external force naturally encountered during the movement of the automatic lawn mower or the external force in the same direction as the external force applied by nature, for example .
  • the movable guard 41 is subjected to the external force exerted by the obstacle, or the buoyancy of the grass on it, etc.; it does not include the downward external force artificially applied to the movable guard 41, which promotes the downward movement of the movable guard wall Case.
  • FIG. 4 it is a schematic diagram of the lowest state 411 of the movable guard 41 within its movable range, and as shown in FIG.
  • FIG. 5 is a schematic diagram of the highest state 412 of the movable guard 41 within its movable range.
  • the movable guard 41 When the movable guard 41 is in its lowest state 411, the distance between the lower end 417 of the movable guard wall and the ground is H1, and when the movable guard 41 is in its highest state 412, the distance between the lower end 417 of the movable guard wall and the ground is H2 .
  • the automatic lawn mower 1 moves on a flat grass, or when it passes the grass where the height of the obstacle 62 is less than or equal to H1, the movable guard 41 is in the lowest state 411.
  • the movable guard 41 When the height of the passing obstacle 62 is greater than H1 and less than H2, the movable guard 41 is subjected to the force exerted by the obstacle 62 and moves upward to pass the obstacle 62 quickly.
  • the movable guard 41 includes a free state, and the free state refers to the state in which the movable guard 41 is located when the automatic lawn mower 1 is not subjected to external force at the corresponding cutting height.
  • the free state of the movable guard 41 can be the same, that is, adjusting the height of the cutting mechanism 3 does not affect the free state of the movable guard 41; of course, in other embodiments, the movable guard The free state of the piece 41 can also be affected by the height adjustment.
  • M is set to 38mm, that is, the initial distance between the lower end 417 of the movable protective wall and the ground is always less than 38mm.
  • M can also be between 38mm and 40mm (including 38mm and 40mm).
  • the distance between the lower end 417 of the movable protective wall and the ground only needs to be always less than M.
  • M is 40mm, it can be moved.
  • the distance between the lower end 417 of the protective wall and the ground is always less than 40 mm.
  • the initial distance between the lower end 417 of the movable protective wall and the ground is always less than 38 mm as an example.
  • the initial distance between the lower end 417 of the movable protective wall and the ground is within the range of 15mm-35mm, so that the distance from the bottom of the protective member 41 to the ground can prevent children’s arms from reaching in, and prevent the movable protective wall from reaching 414 is too close to the ground and affects its normal walking on the grass.
  • the ground clearance of the lower end 417 of the movable protective wall can also be further limited in the range of 19mm-30mm.
  • the ground clearance is limited to greater than 19mm, which increases the ground clearance of the lower end 417 of the movable protective wall to improve passability;
  • the ground clearance is limited to less than 30mm, so that the difference between the ground clearance and the diameter of the child’s arm is greater than a certain value, leaving a certain safety margin to ensure that the child’s fingers cannot be stretched under special conditions such as the tilt of the automatic lawn mower.
  • the distance of the lower end 417 of the movable protective wall from the ground can also be set to other ranges, such as the range of 15mm-25mm, and so on.
  • the initial distance between the lower end 417 of the movable protective wall and the ground is always less than 19 mm, that is, it is always smaller than the radius of the child's arm, so that the child's fingers cannot easily extend into the cutting mechanism 3 from the lower end 417 of the movable protective wall.
  • a safety distance value can be preset, the safety distance value is less than or equal to M, for example, the safety distance value is 40mm, 38mm, or 19mm, 15-35mm, or 19-30mm or 15-25mm, etc. No matter what cutting height the cutting mechanism 3 is at, or the cutting mechanism 3 is at any cutting height, the movable guard 41 is in a free state, and the initial distance H0 from the lower end of the movable guard wall 417 to the ground is always less than the safe distance value. .
  • the cutting mechanism 3 when the cutting height of the cutting mechanism 3 is adjusted, the cutting mechanism 3 can move compared to the movable guard 41 to realize that the movable guard 41 is in a free state and the lower end 417 of the movable guard wall
  • the initial distance H0 from the ground is always less than the safe distance value.
  • the distance H1 from the lower end 417 of the movable guard wall to the ground is less than M to prevent children's arms from extending into the cutting mechanism from the bottom of the movable guard 41 3 inside, and accidentally injured by the cutting mechanism 3.
  • the movable guard 41 when the movable guard 41 is in a free state, that is, when the automatic lawn mower 1 is not subject to external force, the movable guard 41 is in its lowest state 411; and no matter what the cutting mechanism 3 is in.
  • Cutting height when the movable guard 41 is in a free state, the movable guard 41 is always at its lowest state 411.
  • the distance H0 from the lower end of the movable guard wall 417 to the ground is the same as the distance H1 from the lower end of the movable guard 41 to the ground when the movable guard 41 is in its lowest state 411.
  • the movable guard 41 is in the lowest state 411. In the lowest state 411, the distance H1 between the lower end of the movable protective wall 417 and the ground is less than M.
  • the movable protective wall is 414 blocks, and cannot extend the arm into the movable guard 41.
  • the distance H1 between the lower end 417 of the movable protective wall and the ground is in the range of 15-25 mm, so that the distance H1 from the bottom of the movable protective member 41 to the ground can prevent children's arms from reaching in, and will not be affected by mobility.
  • the protective wall 414 is too close to the ground to affect its normal walking on the grass.
  • the distance between the lower end 417 of the movable protective wall and the ground is always less than 19 mm to prevent children's fingers from extending into the cutting mechanism 3 from below the lower end 417 of the movable protective wall.
  • the movable distance of the movable guard 41 in the up and down direction is not less than 15 mm by external force, and the specific upward movable distance can range from 15 to 80 mm, so that the movable guard 41 can avoid most obstacles 62.
  • its distance from the ground can be greater than M, so as to avoid restricting its passability in order to block the child's arm.
  • the automatic lawn mower 1 includes an upward guiding mechanism connecting the housing 10 and the movable guard 41, for example, a parallel four-bar structure, etc., when the movable guard When 41 receives the force from the outside to the inside, the upward guide mechanism is guided to allow the movable guard 41 to move in the up and down direction.
  • the upward guiding mechanism connected to the movable guard 41 may also be referred to as the guard upward guiding mechanism 45.
  • the movable guard 41 can move upwards compared to the bottom shell 101 under the action of an external force to increase the distance of the movable guard wall from the ground; when the external force is eliminated, The movable guard 41 can move downwards compared to the bottom case 101, so that the ground distance of the lower end of the movable guard wall returns to the initial distance.
  • the movable guard 41 can be automatically returned to its free state position by gravity, or it can be returned to its free state position by adding a restoring mechanism, such as a spring. Because the protective member upward guiding mechanism 45 is rotating, it can drive the movable protective member 41 to move up and down, and it can also drive the movable protective member 41 to move in the horizontal direction.
  • the upper and lower movable distance of the movable guard 41 is limited to 20. ⁇ 40mm, so that the guard member upward guiding mechanism 45 should be rotated around the horizontal direction as much as possible to reduce its moving range in the horizontal direction.
  • the movable guard 41 may also be connected to the housing 10 through other structures to realize its movement in the up and down direction, for example, through structures such as four-bar, two-bar, single-bar, and chute.
  • the preset grass safe lifting height when the movable protective wall 414 is moved upward by external force, when the distance from the lower end 417 of the movable protective wall to the ground is greater than the preset grass safe lifting height,
  • the resistance to the upward movement of the protective wall 414 is greater than the resistance of the movable protective wall 414 to move upward when the distance from the lower end 417 of the movable protective wall to the ground is not greater than the preset grass safe lifting height.
  • the grass lift force of the automatic lawn mower 1 is greater than when the distance between the lower end 417 of the movable protective wall and the ground is not greater than the preset safe raising height of the grass.
  • the resistance of the protective wall 414 moving upwards is less than the resistance of the movable protective wall 414 moving upwards when the distance from the lower end 417 of the movable protective wall to the ground is greater than the preset grass safe lifting height. Therefore, when the automatic lawn mower 1 is statically placed on the grass, the grass lifting force can only lift the lower end 417 of the movable protective wall to no more than the preset safe lifting height of the grass, and cannot be raised to the ground greater than the grass. Safely raise the height, so as to prevent the movable protective wall 414 from being raised by the grass to the safe raising height of the grass when the automatic lawn mower 1 is statically placed on the grass, causing the child arm to extend into the cutting mechanism from below the movable protective wall 414 3.
  • the preset grass raising height is less than 38mm to prevent the child's arms from reaching in. In one embodiment, the preset grass raising height is within the range of 15-25mm, so that the distance below the anti-protection member 41 is from the ground The distance can prevent the child's arms from reaching in, and the movable protective wall 414 is too close to the ground to affect normal walking on the grass.
  • the preset grass raising height can also be set to be less than 19mm to prevent children's fingers from reaching in.
  • the grass lifting force of the grass against the automatic lawn mower 1 is greater than that when the automatic lawn mower 1 is stationary, the grass against the upward grass of the movable protective wall 414 Lifting force.
  • the upward movement resistance of the movable protective wall 414 is not only greater than the upward movement of the grass against the movable protective wall 414 when the automatic lawn mower 1 is stationary.
  • the grass lifting force is also greater than the grass lifting force of the automatic lawn mower 1 when the automatic lawn mower 1 is moving.
  • the grass lifting force of the grass on the automatic lawn mower 1 is greater than when the distance between the lower end 417 of the movable protective wall and the ground is not greater than the preset safe lifting height of the grass.
  • the resistance of the protective wall 414 moving upwards is less than the resistance of the movable protective wall 414 moving upwards when the distance from the lower end 417 of the movable protective wall to the ground is greater than the preset grass safe lifting height. Therefore, when the automatic lawn mower 1 moves on the grass, the grass lifting force can only lift the lower end 417 of the movable protective wall to no more than the preset safe lifting height of the grass from the ground, and cannot be raised to the ground greater than the grass.
  • the safe lifting height prevents the movable protection wall 414 from being lifted by the grass to the grass safe lifting height when the automatic lawn mower 1 moves on the grass, and the child's arms extend into the cutting mechanism 3 from below the movable protection wall 414.
  • the preset grass lift height is less than M to prevent the child's arm with a diameter of M from extending in.
  • the preset grass lift height is within the range of 15-25 mm, so that the anti-protection member 41 The distance from the bottom to the ground can prevent the child's arms from reaching in, and will not affect the normal walking on the grass due to the movable protective wall 414 being too close to the ground.
  • the preset grass raising height can also be set to be less than 19mm to prevent children's fingers from reaching in.
  • the minimum distance X between the outermost edge of the movable protective wall 414 and the nearest part of the cutting mechanism 3 is greater than 58mm.
  • the outermost edge of the movable protective wall 414 is closest to the cutting mechanism 3
  • the minimum distance X of the part of is the minimum distance between the outermost edge of the movable protective wall 414 and the cutting element 30 when the cutter head drives the cutting element 30 to rotate.
  • the minimum distance X is 58-200mm. Because the diameter of the finger is small, it can still extend parallel from the bottom of the movable guard 41 to touch the cutting mechanism 3.
  • the movable guard wall The minimum distance X between the outermost edge of the 414 and the closest part of the cutting mechanism 3 to it is 58-200mm, because most children’s fingers are in the range of 58mm. This embodiment can effectively prevent most children’s fingers. It extends from the bottom of the movable guard 41 into the cutting mechanism 3, which causes accidental injury by the cutting mechanism 3.
  • the minimum distance X between the outermost edge of the movable protective wall 414 and the closest part of the cutting mechanism 3 to it is 63-75mm, so as to ensure that children’s fingers cannot touch the cutting mechanism 3 while limiting the
  • the horizontal distance between the movable guard 41 and the cutting mechanism 3 improves the compactness of the overall structure of the automatic lawn mower 1 and realizes the miniaturization and light weight of the automatic lawn mower 1.
  • the outermost edge 413 of the movable protective wall mentioned above refers to the outermost part of the movable protective wall 414 that can be touched by the user's arm or finger. As shown in FIG.
  • the outermost edge 413 of the movable protective wall includes a front The front outermost edge 4131 of the front edge of the movable protective wall 4141, the lateral outermost edge 4132 of the outer edge of the side movable protective wall 4142, and the rear outermost edge 4133 of the rear edge of the rear movable protective wall 4143 .
  • the outermost edge 413 of the movable protective wall may be a flat surface, a curved surface, an irregular surface, or the like.
  • the outermost edge of the movable protective wall 414 that is, the outermost edge 413 of the movable protective wall, includes an obstacle passage area 4135, and the obstacle passage area 4135 includes The oblique surface extends downward, and the obstacle passage area 4135 is high in the outside and low in the inside.
  • the obstacle 62 collides with the outermost edge 413 of the movable protective wall from the outside to the inside, the obstacle 62 generates a vertical to the movable protective member 41
  • the force of the outermost edge 4131 of the uppermost edge 4131 generates an oblique upward force, and the oblique upward force generates an upward component force, thereby causing the movable guard 41 to move upward to quickly pass the obstacle 62.
  • the outermost edge 4131 of the front end of the movable protective wall 414 includes the above-mentioned obstacle passage area 4135.
  • the obstacle passage area 4135 includes an inclined surface extending downward from the outside to the inside (from front to back), in the direction of the automatic lawn mower. On the upper side, the outermost edge of the inclined front end 4131 is high in the front and low in the back.
  • the force of the outermost edge 4131 of the front end of 41 that is, an oblique upward force is generated, and the oblique upward force generates an upward component force, thereby causing the movable guard 41 to move upward as shown in Fig. 5 to avoid obstacles
  • the object 62 further improves the passability of the automatic lawn mower 1 while preventing the child's fingers or arms from touching the cutting mechanism 3.
  • the outermost edge 4131 of the front end may be an inclined plane or curved surface.
  • the outermost edge 4133 of the rear end of the movable protective wall 414 extends from the outside to the inside (from the back to the front), and extends downward. In the forward direction of the automatic lawn mower 1, the outermost edge 4133 of the inclined rear end is low in the front and high in the back.
  • the automatic lawn mower 1 When the automatic lawn mower 1 retreats, if it collides with an obstacle 62, the obstacle 62 will produce a vertical to the movable guard
  • the force of the outermost edge 4133 of the rear end of 41 that is, an oblique upward force is generated, and the oblique upward force generates an upward component force, which in turn causes the movable guard 41 to move upward to avoid the obstacle 62, thereby achieving
  • the automatic lawn mower 1 can prevent the child's fingers or arms from touching the cutting mechanism 3, and at the same time improve the passability when retreating.
  • the outermost edge 4133 of the rear end may be an inclined plane or curved surface.
  • the outermost edge 4132 of the side of the movable protective wall 414 can also be set to tilt outward and extend upward, so that when the automatic lawn mower 1 is turning to both sides, it can quickly pass through obstacles and improve its turning speed. Passability.
  • the automatic lawn mower 1 includes a limit structure 418 and a reset structure 416.
  • the reset structure 416 is an elastic member for connecting the movable connecting wall 415 and the rear movable protective wall 4143, such as a torsion spring.
  • the structure 418 is the limiting portion 4181. In other embodiments, the limiting structure 418 and the resetting structure 416 may have other forms.
  • the rear movable protective wall 4143 After the rear movable protective wall 4143 rotates clockwise for a certain distance, it is reversed by the reset structure 416, for example, by the restoring force of the torsion spring, the rear movable protective wall 4143 returns counterclockwise to the position shown in FIG. 13 .
  • the rear movable protective wall 4143 is designed in a reversible form and assembled on the movable connecting wall 415.
  • the rear movable protective wall 4143 is turned down to avoid the obstacle 62, and the reduced
  • the movable protective wall 4143 can move upwards, and more space is reserved for the housing 10 above the rear movable protective wall 4143, making the overall structure of the automatic lawn mower 1 more compact.
  • F is the horizontal thrust of the child's arm
  • L1 is the length of the connecting rod
  • L2 is the allowable floating distance of the guard
  • G is the weight of the guard
  • b is the angle inwardly inclined from the vertical plane where the outermost end is located.
  • the movable guard 41 is 30 mm away from the ground, and it is allowed to move upward by 20 mm, that is, the lower end 417 of the movable guard is between 30 and 50 mm from the ground.
  • the length of the four-bar linkage is 110mm.
  • F is the test force of the child arm 5N
  • G 0.93N. That is, the weight of the movable protective part is greater than 93g, and the child's arm test force cannot lift the protective part.
  • the outermost edge 413 of the movable protective wall further includes a safety locking area 4136 for preventing the child's arm from lifting the movable protective wall 414.
  • the safety external force value F1 is preset, and the safety external force value is not less than the test force of the child arm 5N.
  • the safety lock area 4136 is provided in the area where the outermost edge 413 of the movable guard is in contact with the test arm 61 to prevent the lower end 417 of the movable guard from moving upward under the test force of the child's arm.
  • the distance from the lower end of the safety lock zone to the ground is less than M.
  • the safety lock zone 41 can also be provided at a distance between the movable protection wall 414 and the ground beyond M to prevent the child's arm from contacting the movable protection wall 414 obliquely.
  • the length of the safety lock zone 41 extending in the up and down direction is not less than 3 mm, for example, it can be 3-4 mm.
  • the safety lock zone 4136 is located outside of the downward extension line of the obstacle passage zone in the same radial direction.
  • the safety lock area 4136 includes an inclined surface and/or a vertical surface.
  • the safety lock area 4136 includes an inclined surface extending downwardly from the outside inward and/or a vertical surface and/or an inclined surface extending upwardly from the outside inward.
  • the above-mentioned inclined surface and vertical surface may be flat, curved, irregular, etc.
  • the angle of the inclined surface of the safety lock area 4136 from the vertical plane where the outermost end is located can be less than 15 degrees.
  • the inclination angle of the inclined surface of the safety lock zone 4136 from the vertical plane where the outermost end is located may be less than 3 degrees.
  • the safety lock area 4136 is an inclined surface extending downwards from the outside to the inside, the inclined surface of the safety lock area 4136 is inclined inward from the vertical plane where the outermost end is located, which is smaller than the inclined surface of the obstacle passage area 4135 The angle of inward inclination from the vertical plane where the outermost end is located. The smaller the angle of the inclined surface of the safety lock zone 4136 inward from the vertical plane where the outermost end is located, the less likely it is for the movable protective wall to move upward when the preset safety external force value acts on the safety lock zone 4136.
  • the safety lock area 4136 may be selected as a vertical surface, and only the mold-out angle may be retained.
  • the inclined surface of the obstacle passage area 4135 is inclined inward from the vertical plane where its outermost end is located, and the movable protective wall 414 is easily lifted when the obstacle 62 hits the movable protective wall 414. The easier it is to avoid obstacles.
  • the movable protective wall 414 in the vertical direction of the automatic lawn mower 1, includes a main movable portion 401 at the upper end thereof and a locking portion 402 formed by the autonomous movable portion 401 extending downward.
  • the outermost edge of the main movable portion 401 is provided with an obstacle passage area 4135, and the outermost edge of the locking portion 402 is provided with a safety lock area 4136.
  • the movable protection wall has both the obstacle passage area 4135 and the safety lock area 4136 as an example. In other embodiments, the movable protection wall may only have the obstacle passage area 4135 and the safety lock area 4136. one of.
  • the distance from the lower end of the locking portion 402 to the ground is preferably in the range of M/2 to M, where M is between 38mm-40mm.
  • the outermost edge of the locking portion 402 is a continuous surface or a section is a long continuous surface, when the test arm 61 is along
  • the test arm 61 is along
  • the illegal line hits the lower end of the movable protective wall 414 shown in FIG. 43
  • its force is shown in FIGS. 44 and 45.
  • the transition surface between the front end surface of the test arm 61 and the side surface of the test arm 61 resists the most of the locking portion 402.
  • the force-receiving surface is a transition surface, and as shown in Figure 45, the force-receiving point on the test arm 61 is located above the horizontal plane where the center line of the test arm is located.
  • the test wall 61 and the movable guard The wall 414 resists and generates a force F as shown in FIG. 45, which can be decomposed into a component F1 in the vertical direction and a component F2 in the horizontal direction, wherein the component F1 in the vertical direction pushes the
  • the floating protective wall moves upwards, causing the movable protective wall to increase the distance from the ground.
  • the test arm 61 can extend into the movable protective wall 414, and then into the cutting mechanism and be accidentally injured .
  • the transition part may not be provided if the distance between the highest point of the blocking protrusion 4021 and the ground is large enough.
  • the transition part may not be provided, that is, the blocking protrusion 4021 is formed by directly extending downward from the bottom of the main movable part 401.
  • the transition portion 4022 connected above the blocking protrusion 4021 can be called an upper blocking portion.
  • the main movable portion 401 is directly connected above the blocking protrusion 4021
  • the main movable part 401 can also be called an upper blocking part.
  • the force receiving surface is always the front end surface of the test arm 61, which only generates the force on the horizontal surface shown in Figure 48. F', no upward force is generated, which can prevent the movable protective wall 414 from moving upward when the test arm 61 is applied in the direction of the illegal line, causing the test arm 61 to extend into the cutting mechanism, thereby causing danger.
  • the force-bearing surface is the front end surface of the test arm 61, thereby avoiding the generation of upward force, one of any two adjacent blocking protrusions 4021
  • the distance S and the height h of the blocking protrusion 4021 must be greater than zero, but in order to prevent the test arm 61 from extending into the gap between two adjacent blocking protrusions 4021 along the normal direction, the distance S ⁇ the diameter of the test arm Since the diameter of the test arm is less than or equal to 40mm, in this embodiment, the range of S is limited to: 0 ⁇ S ⁇ 40mm; preferably, the range of S is: 3 ⁇ S ⁇ 25mm to avoid two adjacent blocking protrusions
  • the gap between 4021 is too small, causing the test arm to invade along the illegal line to generate upward force, or the gap is too large, and the test arm 61 can extend into the gap. At the same time, if the blocking protrusion 4021 is too large, it will
  • the width M of the blocking protrusion 4021 is limited to 0 ⁇ M ⁇ 40mm, preferably 0 ⁇ M ⁇ 20mm, the outermost edge of the blocking protrusion 4021 does not overlap with the outermost edge of the upper blocking portion, that is, the outermost edge of the blocking protrusion 4021 does not overlap with the outermost edge of the transition portion 4022, and the blocking protrusion 4021 does not overlap with the uppermost edge.
  • the overlapping portion of the outermost edge of the blocking portion is located inside the corresponding portion of the outermost edge of the upper blocking portion, that is, as shown in FIG.
  • the portion where the outermost edge of the blocking protrusion 4021 does not overlap the outermost edge of the transition portion 4022 It is located inside the corresponding part of the outermost edge of the transition portion 4022.
  • the curvature of the blocking protrusion 4021 and the curvature of the upper blocking portion at the corresponding position are large, that is, the transition portion at the corresponding position 4022 has a large curvature.
  • the radius of curvature R of the blocking protrusion 4021 may be set to 0 ⁇ R ⁇ 20mm, preferably 0 ⁇ R ⁇ 10mm.
  • the outermost edge of the blocking protrusion 4021 is a semi-circular arc surface.
  • the outermost edge of the blocking protrusion 4021 may also be another arc surface, or a straight surface with a relatively small width, etc. .
  • the ground distance of the lower end of the locking portion 402 that is, the lower end of the blocking protrusion 4021
  • the ground distance of the lower end of the locking portion 402 is 19mm- 40mm
  • the distance from the lower end of the locking portion 402 to the ground can also be restricted within the radius of the child's arm to avoid the generation of upward force when the child's arm collides with the locking portion 402 in an illegal direction.
  • the initial distance of the movable protective wall 41 from the ground is always less than or equal to M/2, that is, the initial distance of the lower end of the locking portion 402 from the ground is limited to less than or equal to M/2, For example, the distance from the lower end of the locking portion 402 to the ground is less than or equal to 19 mm.
  • the force point on the test arm 61 is always on the test wall 61 On the horizontal plane where the center line of ⁇ is located, only the force F′′ on the horizontal plane is generated at this time, and no upward component force is generated. Therefore, at this time, the child's arm can also be prevented from extending into the movable protective wall 414 along the illegal line.
  • the locking portion 402 at the lower end of the movable protective wall 41 further includes a blocking protrusion extending in the up and down direction for connecting at least two adjacent Starting from the connecting protrusion 4023 of 4021, the connecting protrusion 4023 is partially recessed inward so that the connecting protrusion 4023 and the two adjacent blocking protrusions 4021 connected to it together enclose an outer spaced and inner closed structure.
  • a grass pressing end surface 406 extending continuously in the circumferential direction can also be directly provided at the lower end of the movable protection wall or the lower end of the mechanism protection wall.
  • the grass pressing end surface 406 only needs to make the lower end of the movable protection wall free from the inner and outer directions.
  • the penetrating opening is sufficient, which can be zigzag as shown in Figure 51, can also be the structure shown in Figure 56, or the structure shown in Figure 43, the grass end surface 406 directly overwhelms the grass, thereby avoiding running resistance Large, even breaking or straining the grass.
  • the distance d between the outermost side of the blocking protrusion 4021 and the innermost side of the connecting protrusion 4023, The height h of the protrusion 4021, the distance S between two adjacent blocking protrusions 4021, and the width M of the blocking protrusion 4021 cannot be too large or too small; d is too large, or h is too large, or S is too large , The more the amount of stuffing into the gap between the two blocking protrusions or the approximately the distance the grass moves in the gap, the greater the running resistance, the easier it is to strain the grass; d is too small, or h is too small, or S is too small , Or if M is too large, the child's arms are easier to extend into the movable protective wall 414, which brings safety risks; M also cannot be too small, if M is too small, the strength of the blocking protrusion 4021 will also be reduced
  • 1mm ⁇ d ⁇ 100mm preferably 3mm ⁇ d ⁇ 20mm; 0mm ⁇ h ⁇ 80mm, preferably 3mm ⁇ h ⁇ 20mm; 0 ⁇ S ⁇ 40mm, preferably 3 ⁇ S ⁇ 25mm; 0 ⁇ m ⁇ 40mm, preferably 0 ⁇ m ⁇ 20mm, so as to improve the passability of the automatic lawnmower under the premise that the child's arm cannot be extended into the movable protective wall.
  • the connecting protrusion 4023 is a V-shaped structure connecting two adjacent blocking protrusions 4021, and the connecting protrusion 4023 and the blocking protrusion 4021 are connected in a zigzag shape.
  • Such a design can ensure that the adjacent The distance S between the two blocking protrusions 4021, the distance d between the outermost side of the blocking protrusion 4021 and the innermost side of the connecting protrusion 4023, the height h of the blocking protrusion 4021, and the width M of the blocking protrusion 4021 are all It is possible to reduce the volume of the groove formed by the connecting protrusion 4023 and the blocking protrusion 4021 and facing the outside of the automatic lawn mower, reduce the amount of grass inserted into the groove, reduce the running resistance, and reduce the grass strain risks of.
  • the connecting protrusion 4023 may also have an arc structure close to a V shape, and the connecting protrusion 4023 and the blocking protrusion 4021 may be connected in a wave shape, or as shown in FIG. 56,
  • the connecting protrusion 4023 may also have an N-shaped structure, and the connecting protrusion 4023 and the blocking protrusion 4021 are connected to form a continuous N-shaped structure, and so on.
  • the connecting protrusion 4023 and the blocking protrusion 4021 are connected to form a continuous N-shaped structure, and so on.
  • the lower end of the guard assembly 4 is always lower than the cutting element 30.
  • the lower end of the protective assembly 4 can always be lower than the lowest point 30 of the cutting element by adding the aforementioned mechanism guard 42. It can also be achieved by restricting the relative positional relationship between the movable guard 41 and the cutting mechanism 3 during the movement of the movable guard 41.
  • the movable guard 41 receives an external force, and the lower end 417 of the movable guard wall moves up and down. In the middle, the lower end 417 of the movable protective wall is always lower than the lowest point 30 of the cutting element.
  • the lower end of the guard assembly 4 can be always lower than the lowest point 30 of the cutting element by adding the aforementioned mechanism guard 42 as an example.
  • the protection assembly 4 includes a movable protection piece 41 and a mechanism protection piece 42, wherein the mechanism protection piece 42 is fixed compared to the cutting mechanism 3. For example, when the cutting structure 3 moves compared to the housing, the mechanism protection piece 42 moves together. When the cutting mechanism 2 does not move compared to the housing, the mechanism guard 42 also does not move. Wherein, in the non-elevating state, the cutting mechanism 3 can be set to be able to move compared to the housing, or it can be set to not move compared to the housing.
  • the test arm 61 Even if it passes over the movable guard 41, it will be blocked by the mechanism guard 42; even if the lower end of the mechanism guard 42 is higher than the test arm 61, the test arm 61 can only be located below the cutting element 30 and cannot touch the cutting element 30 . Therefore, the safety of children's arms can be guaranteed.
  • any of the aforementioned or later other embodiments with the mechanism guard 42 can be directly cited. In this embodiment, the structure will not be described in detail.
  • the lower end of the guard assembly 4 is always lower than the cutting element by restricting the relative positional relationship between the movable guard 41 and the cutting mechanism 3 during the movement of the movable guard 41 Take 30 as an example.
  • the lower end of the movable guard 41 is always lower than the lowest point 30 of the cutting element, so as to realize the movable guard during the whole movement
  • the lower end of 41 is always lower than the lowest point 30 of the cutting element.
  • the lower end 417 of the movable guard wall of the movable guard 41 is lower than the lowest point of the cutting element 30, so that no matter how the cutting height of the automatic lawn mower 2 is adjusted, when the movable guard 41 is in the lowest state, the lower end 417 of the movable guard wall of the movable guard 41 is always lower than the lowest point 30 of the cutting element to prevent children
  • the arm is crushed by the automatic lawn mower 1.
  • the distance between the lower end 417 of the movable protective wall and the lowest point 30 of the cutting element is 2-30 mm to ensure that children's fingers and arms cannot touch the cutting mechanism 3 around the protective member.
  • the cutting mechanism is at any cutting height.
  • the lower end 417 of the movable protective wall is lower than the lowest point 30 of the cutting element, so as to realize that when the movable protective member 41 receives a force from outside to inward, the lower end 417 of the movable protective wall of the movable protective member 41 is always lower than the lowest point of the cutting element 30.
  • the cutting mechanism 3 when the automatic lawn mower 1 is moving at at least one cutting height, when the movable guard 41 is moved in the up and down direction by an external force, the cutting mechanism 3 follows the movable guard 41 Synchronous movement in the up and down direction to ensure that the lower end 417 of the movable protective wall is always lower than the lowest point 30 of the cutting element.
  • the movable guard 41 and the cutting mechanism 3 are connected to each other. During the movement of the automatic lawn mower 1, when the movable guard 41 is forced to move upwards, the cutting mechanism 3 moves upwards together. When the movable guard 41 moves upwards When moving down, the cutting mechanism 3 also moves down together.
  • the cutting mechanism 3 and the movable guard 41 are connected to each other, so that when the movable guard 41 moves up and down, the cutting mechanism 3 can be driven to move up and down synchronously.
  • the cutting mechanism 3 follows the movable guard 41 to move up and down.
  • the cutting mechanism 3 can be fixed compared to the movable guard 41 and can also produce a certain relative movement.
  • the cutting mechanism 3 and the movable guard 41 are relatively fixed in the vertical direction, that is, the relative position of the two does not change in the vertical direction.
  • the cutting mechanism 3 can move together with the movable guard 41, the relative positions of the two in the vertical direction remain unchanged, as long as the movable guard 41 is in the lowest state, the lower end 417 of the movable guard wall is lower than the lowest point 30 of the cutting element, then During the entire movable process of the movable guard 41, the lower end 417 of the movable guard wall is lower than the lowest point 30 of the cutting element.
  • the cutting mechanism 3 in the vertical direction, while the cutting mechanism 3 moves with the movable guard 41, the cutting mechanism 3 can also move relative to the movable guard 41.
  • the automatic lawn mower 1 also includes a The movable adjustment mechanism (not shown) that adjusts the movement of the cutting mechanism 3 compared to the movable guard 41, for example, the movable adjustment mechanism is an adjustment mechanism that automatically adjusts the cutting mechanism 3 upwardly movable, for example, when movable The guard 41 is moved upwards by 20mm by external force, and the movable adjusting mechanism controls the cutting mechanism 3 to move upwards by 10mm compared with the movable guard 41. During the whole process, the movable guard 41 moves upwards by 20mm compared with the housing 10 , And the cutting mechanism 3 moves up 30mm compared to the housing 10.
  • the movable adjustment mechanism is an adjustment mechanism that automatically adjusts the cutting mechanism 3 upwardly movable, for example, when movable The guard 41 is moved upwards by 20mm by external force, and the movable adjusting mechanism controls the cutting mechanism 3 to move upwards by 10mm compared with the movable guard 41.
  • the movable guard 41 moves upwards by 20mm compared with the housing
  • the cutting mechanism 3 and the movable guard 41 can move relative to each other in the up and down direction, so that the lower end 417 of the movable guard wall will not increase indefinitely as the cutting mechanism 3 is adjusted. Ensure that the distance H0 between the lower end of the movable protective wall 417 and the ground is always less than the preset safe distance value, for example, is always less than 38mm.
  • the cutting mechanism 3 and the movable guard 41 are relatively movable in the up and down direction. In the process of adjusting the height of the cutting mechanism 3, the cutting mechanism 3 moves in the up and down direction compared to the ground. The guard 41 does not move in the vertical direction compared to the ground.
  • the cutting mechanism 3 and the movable guard 41 can both move up and down, but they do not move synchronously when they are raised.
  • the movable guard 41 moves less than the cutting mechanism 3. The distance moved etc.
  • the above-mentioned implementation of the safe raising height of the grass can also be used.
  • the safe raising height of the grass is preset.
  • the movable protective wall 414 When the movable protective wall 414 is moved upward by an external force, when the lower end 417 of the movable protective wall is When the ground distance is greater than the preset safe raising height of the grass, the resistance of the movable protective wall 414 upward moving is greater than when the distance from the lower end 417 of the movable protective wall to the ground is not greater than the preset safe raising height of the grass, the movable protective wall 414 moves upward Resistance to movement. To achieve this, when the automatic lawn mower 1 is placed on the grass statically, the grass lifting force can only lift the lower end 417 of the movable protective wall to no more than the preset grass safe lifting height from the ground, and cannot be raised to more than the ground.
  • the height of the grass is raised safely, so as to avoid that when the automatic lawn mower 1 is statically placed on the grass, the movable protective wall 414 is raised by the grass to the height of the grass safely raised, causing the child's arm to extend from below the movable protective wall 414 to cut Institution 3.
  • the details of this embodiment will not be repeated one by one.
  • the automatic lawn mower 1 includes a limit mechanism 9 used to limit the relative position of the movable guard 4 and the cutting mechanism 3, and the limit mechanism 9 is used to restrict the movable guard 4 and the cutting mechanism 3 up and down. The degree of relative movement in the direction.
  • the limiting mechanism 9 includes a cutting limiting portion 39 and a protective member limiting portion 419 that can resist and limit each other.
  • the cutting limiting portion 39 and the cutting mechanism 3 are relatively fixed in the vertical direction, and the protective member limiting portion 419 and the movable The guard 41 is relatively fixed in the up and down direction.
  • the cutting limit portion 39 and the movable guard 41 abut against each other, the cutting limit portion 39 is located above the guard limit portion 419.
  • the limiting mechanism 9 includes a protective member limiting portion 419 provided on the movable protective member 4 and a cutting limiting portion 39 provided on the cutting mechanism 3.
  • the cutting limit part 39 is located above the limit part 419 of the guard.
  • the movable guard wall 414 When the movable guard wall 414 is moved upward by an external force, the movable guard wall 414 can move up and down compared to the cutting mechanism 3, and the movable guard wall When 414 moves upwards, the guard stopper 419 follows the upward movement. When the guard stop 419 moves to resist the cutting stop 39, it is blocked by the cutting stop 39, and the movable guard 4 moves upwards. Due to the limitation of the cutting mechanism 3, the movable guard 4 can no longer continue to move upwards compared to the cutting mechanism 3, thereby limiting the range of upward movement of the movable guard 4 compared to the cutting mechanism 3, so that the movable guard 4 moves upwards During the process, the lower end 417 of the movable protective wall is always lower than the lowest point 30 of the cutting element.
  • the distance between the lower end 417 of the movable guard wall and the lowest point 3 of the cutting element is greater than the guard stop 419 and the cutting limit
  • the distance between the parts 39 is such that when the movable guard 4 moves to the highest state, the lower end 417 of the movable guard wall is still lower than the lowest point 3 of the cutting element, and during the entire movable process, the lower end of the movable guard wall 417 is always lower than the lowest point 3 of the cutting element.
  • the lower end 417 of the movable guard wall and the cutting element are the lowest The distance between the points 30 increases synchronously, so no matter how much the cutting mechanism 3 is raised, the lower end 417 of the movable protective wall is always lower than the lowest point 30 of the cutting element in the up and down direction.
  • other methods can also be used to realize that during the movable process of the movable guard 4, the lower end 417 of the movable guard wall is always lower than the lowest point 3 of the cutting element, which will not be described one by one in the present invention.
  • the above-mentioned implementation manner of presetting the grass safe lifting height can also be used to prevent the movable protective wall 414 from being lifted by the grass to the grass safe lifting height when the automatic lawn mower 1 is resting on the grass. As a result, the child's arms extend into the cutting mechanism 3 from below the movable protective wall 414. The details of this embodiment will not be repeated one by one.
  • the cutting mechanism 3 does not move in the vertical direction compared to the ground.
  • the cutting mechanism 3 cannot move upwards, therefore, The movable guard 4 can no longer move upward.
  • the cutting mechanism 3 can also move up and down compared to the ground, and the cutting mechanism 3 and the movable guard 41 can be relatively independent Move up and down.
  • the automatic lawn mower 1 includes a protective member upward guiding mechanism 45 for connecting the movable protective member 41 and the housing 10, and a cutting upward guiding mechanism 35 for connecting the cutting mechanism 3 and the housing 10, and the protective member upward guiding mechanism 45 Independent of the cutting upward guiding mechanism 315, so that the cutting mechanism 3 and the movable guard 41 can move in the vertical direction relatively independently.
  • the cutting mechanism in the non-elevating state, when the cutting mechanism is subjected to external force, the cutting mechanism can move up and down compared to the ground. At least one cutting height, when the protective wall 414 is movable In the process of moving in the up and down direction by an external force, the lower end of the movable protective wall 414 can move in the up and down direction compared to the cutting mechanism 3.
  • the movable protective wall 414 when the cutting mechanism is at any cutting height, can move up and down compared to the cutting mechanism as an example. In other embodiments, the two can move relative to each other in only partial gears.
  • the movable protective wall 414 first moves upwards separately until it is mutually restricted with the cutting mechanism 3, and then, as shown in FIGS. 28 to 29, the movable protective wall 414 and the cutting mechanism 3 move upward together.
  • the resistance of the movable protective wall 414 to move upward alone is less than the resistance of the movable protective wall 414 and the cutting mechanism 3 to move upward together after being restricted.
  • the movable protective wall 414 is affected by the upward grass lifting force of the grass, which is greater than the movable protective wall 414 alone upwards. Due to movement resistance, the movable protective wall 414 can move upward.
  • the grass lifting force is less than the resistance of the movable protective wall 414 and the cutting mechanism 3 to move upward together after being restricted. Therefore, when the movable protective wall 414 moves upward to the restriction with the cutting mechanism 3, the grass pair can move The grass lifting force of the protective wall 414 cannot lift the movable protective wall 414 upwards together with the cutting mechanism 3. At this time, the movable protective wall 414 is maintained in this state to perform the cutting task, so that the lower end of the movable protective wall can be cut during cutting.
  • the distance between 417 and the lowest point 30 of the cutting element is maintained within a certain range to avoid that the lower end 417 of the movable protective wall is too close to the ground and too far from the lowest point 30 of the cutting element. The grass cannot be cut.
  • the distance between the lower end 417 of the movable protective wall and the lowest point 30 of the cutting element is increased, and the possibility of pressing the grass is reduced. Even if the lower end 417 of the movable protective wall presses the grass, the distance between the lower end 417 and the lowest point 30 of the cutting element is reduced, the pressed grass can still be cut, thereby greatly improving the cutting quality.
  • the movable protection wall 414 when the movable protection wall 414 is subjected to an external force from the bottom to the top, the lower end of the movable protection wall 414 moves upward relative to the bottom shell.
  • the movable protective wall 414 receives the buoyancy from the bottom to the top exerted by the grass, the movable protective wall 414 can move upward, and the lower end of the movable protective wall 414 generates The upward displacement can reduce the movement resistance imposed by the dense grass and improve the passability of the dense grass.
  • the movable protective wall 414 is in the form of moving up and down compared to the bottom shell as a whole.
  • the movable protective wall 414 may also be shown in FIGS. 19 to 20, which is a movable protective wall.
  • the compression structure makes the lower end move upward when the lower end receives the force from the bottom to the top, so as to improve the passability of dense grass.
  • the movable guard can also be in other forms, and no more examples are given.
  • the above-mentioned implementation of the preset grass safe lifting height can also be combined to preset the grass safe lifting height.
  • the movable protective wall 414 When the movable protective wall 414 is moved upward by an external force, when the lower end 417 of the movable protective wall is When the ground distance is greater than the preset safe raising height of the grass, the resistance of the movable protective wall 414 upward moving is greater than when the distance from the lower end 417 of the movable protective wall to the ground is not greater than the preset safe raising height of the grass, the movable protective wall 414 moves upward Resistance to movement.
  • the lifting force of the grass on the movable protective wall 414 is greater than when the distance from the lower end 417 of the movable protective wall to the ground is greater than the preset grass safe lifting height, and the movable protective wall 414 has not When it is restricted with the cutting mechanism 3, the resistance of the movable protective wall 414 to move upward is smaller than the resistance of the movable protective wall 414 and the cutting mechanism 3 to move upward after being restricted. Therefore, when the automatic lawn mower 1 is moving, the grass can lift the movable protective wall 414 up to the limit of the cutting mechanism 3, thereby ensuring the distance between the lower end 417 of the movable protective wall and the lowest point 30 of the cutting element. To improve cutting quality.
  • the grass lifting force of the automatic lawn mower 1 is greater than when the distance between the lower end 417 of the movable protective wall and the ground is not greater than the preset grass safe lifting height.
  • the resistance of the movable protective wall 414 moving upwards is less than the resistance of the movable protective wall 414 moving upwards when the distance from the lower end 417 of the movable protective wall to the ground is greater than the preset grass safe lifting height. Therefore, when the automatic lawn mower 1 is statically placed on the grass, the grass lifting force can only lift the lower end 417 of the movable protective wall to no more than the preset safe lifting height of the grass, and cannot be raised to the ground greater than the grass.
  • the preset grass raising height is less than M to prevent the child's arms from extending in.
  • the preset grass raising height is within the range of 15-25 mm, so that the movable guard 41 is below the ground The distance between the two can prevent the child’s arm from reaching in, and the movable protective wall 414 is too close to the ground to affect its normal walking on the grass.
  • the preset grass raising height can also be set to be less than 19mm to prevent children's fingers from reaching in.
  • the movable guard 41 includes an upper guard 43 and a lower guard 44, which can be compared with the upper guard 43 through the lower guard 44 Move in the up and down direction to realize that the distance between the lower end of the lower guard 43 and the ground changes, and at the same time realize that the lower end of the lower guard 43 is movable in the up and down direction compared to the cutting mechanism 3.
  • the upper protective member 43 and the lower protective member 44 respectively include an upper protective wall 434 and a lower protective wall 444.
  • the upper protective wall 434 and the lower protective wall 444 jointly form a movable protective wall 414.
  • the lower end of the lower protective wall 444 is the lower end 417 of the movable protective wall.
  • the lowest state 411 of the movable guard 41 is that the lower guard 44 is in the lowest position in the space that can move in the up and down direction
  • the highest state 412 is that the lower guard 44 is in the space that is movable in the up and down direction.
  • the protective member limiting portion 419 on the movable protective member 41 is provided on the lower protective member 44
  • the cutting mechanism 3 is provided with a cutting limiting portion 39 for mutually limiting the protective member limiting portion 419.
  • the lower protective wall 444 and the cutting mechanism 3 can move up and down relative to achieve the lower end of the lower protective wall 444, that is, the distance between the lower end 417 of the movable protective wall and the ground is always less than M .
  • the upper protective wall 434 and the cutting mechanism 3 can move relative to each other in the up and down direction, while the lower protective wall 444 and the upper protective wall 434 do not move relative to each other in the up and down direction, so that the lower protective wall 444 and the cutting mechanism 3 can move in the vertical direction. Relative movement up and down.
  • the resistance of the lower protective wall 444 moving upwards alone is less than the resistance of the lower protective wall 444, the upper protective wall 434 and the cutting mechanism 3 moving upwards together after the lower protective member 44 and the cutting mechanism 3 are in position.
  • the lower guard 44 is subjected to the upward grass lifting force of the grass, and the grass lifting force is greater than the resistance of the lower guard 44 moving upward alone.
  • the lower protective wall 444 can move upward.
  • the grass lifting force is less than the resistance of the lower protective wall 444 and the cutting mechanism 3 to move upward together after being restricted.
  • the upper protective member 44 and the lower protective member 44 are maintained in this state to perform the cutting task, so that during cutting, The distance between the lower end 417 of the movable protective wall and the lowest point 30 of the cutting element is maintained within a certain range, that is, the distance between the lower end of the lower protective wall 444 and the lowest point 30 of the cutting element is maintained within a certain range to avoid the lower protective wall If the lower end of 444 is too close to the ground and too far from the lowest point 30 of the cutting element, the grass pressed by the lower end of the lower protective wall 444 cannot be cut.
  • the distance between the lower end of the lower protective wall 444 and the lowest point 30 of the cutting element is increased, and the possibility of grass pressing is reduced. Even if the lower end of the lower protective wall 444 presses the grass, the pressed grass can still be cut due to the reduced distance from the lowest point 30 of the cutting element, thereby greatly improving the cutting quality.
  • the cutting mechanism 3 and the movable guard 41 can be combined to move in the up and down directions relatively independently, and the cutting mechanism 3 and the movable guard 41 are provided with a mutual limit stop mechanism 9
  • the implementation of the preset grass safe lifting height is to preset the grass safe lifting height.
  • the resistance of the lower protective wall 444 moving upward is greater than the resistance of the lower protective wall 444 moving upward when the distance between the lower protective wall 444 and the ground is not greater than the preset grass safe lifting height.
  • the resistance of the lower protective wall 444 to move upward is greater than that of the lower protective wall.
  • the resistance of the lower protective wall 444 moving upwards it is smaller than the lower protective wall 444 and the upper protective wall The resistance of the wall 434 and the cutting mechanism 3 to move upward together after being restricted.
  • the lifting force of the grass against the lower protective wall 444 is greater than the distance between the current protective wall 444 and the ground is greater than the preset safe raising height of the grass, and the lower protective wall 444 has not been in contact with the cutting mechanism 3.
  • the resistance of the lower protective wall 444 moving upwards is less than the resistance of the lower protective wall 444 moving upwards together after the cutting mechanism 3 is restricted. Therefore, when the automatic lawn mower 1 is moving, the grass can lift the lower protective wall 444 upwards to the state shown in FIG. 32, which is restricted to the cutting mechanism 3, thereby ensuring that the lower end of the lower protective wall 444 and the cutting element are the lowest. The distance between points 30 to improve cutting quality.
  • the grass lifting force of the grass on the automatic lawn mower 1 is greater than the current distance between the lower end of the lower protective wall 444 and the ground and not greater than the preset grass safe lifting height.
  • the resistance of the upward movement of the lower protective wall 444 is smaller than the resistance of the lower protective wall 444 when the distance from the lower end of the lower protective wall 444 to the ground is greater than the preset grass safe lifting height. Therefore, when the automatic lawn mower 1 is statically placed on the grass, the grass lifting force can only lift the lower end of the lower protective wall 444 to no more than the preset grass safe lifting height from the ground, and cannot be raised to the ground greater than the grass safe.
  • the preset grass raising height is less than M to prevent the child's arms from extending in.
  • the preset grass raising height is within the range of 15-25 mm, so that the movable guard 41 is below the ground The distance between the two can prevent the child’s arm from reaching in, and the movable protective wall 414 is too close to the ground to affect its normal walking on the grass.
  • the preset grass raising height can also be set to be less than 19mm to prevent children's fingers from reaching in.
  • the movable guard 4 and the cutting mechanism 3 can also be automatically movable.
  • the automatic lawn mower 1 also includes a detection module for detecting whether the movable guard 4 and the cutting mechanism 3 need to be movable, and the automatic lawn mower 1 automatically controls the movable guard 4 and the cutting mechanism 3 according to the detection result of the detection module Movable movable control module.
  • the detection module can be a visual sensor, an ultrasonic sensor, an infrared sensor, etc. It can detect whether there is an obstacle in front and the size of the obstacle through vision, ultrasonic, infrared and other methods. When there is an obstacle that can be crossed, the control module can be activated.
  • the movable guard 4 and the cutting mechanism 3 automatically move to avoid obstacles, and adjust the movement distance of the movable guard 4 and the cutting mechanism 3 according to the size of the obstacle, and adjust the movement distance of the movable guard 4 and the cutting mechanism 3
  • the movable control module controls the movable guard 4 and the cutting mechanism 3 to return to the original state; there is an obstacle at the front, but the obstacle is too large, the movable control module controls the movable guard 4 and the cutting mechanism 3 not to move, and According to the actual situation, the automatic lawn mower 1 is controlled to stop or turn to avoid collision with obstacles.
  • the test arm 61 is flat on the ground, when the driving wheel 201 of the automatic lawn mower 1 climbs on the test arm 61, it will cause the automatic The lawn mower 1 is inclined. At this time, if the cutting mechanism 3 of the automatic lawn mower 1 has a low ground clearance, the test arm 61 may touch the cutting element 32, and there is a risk of injury to the child's arm.
  • the automatic lawn mower further includes a bendable and flexible blocking member provided on the bottom side of the housing.
  • the blocking member 19 In the forward direction of the mobile device, the blocking member 19 is located in front of the mobile module.
  • the blocking member On the side and/or rear side, the blocking member includes a shell end fixed on the bottom side of the shell, and a free end that can move compared to the shell end under the action of an external force. It can resist the mobile module under the action of external force to prevent the mobile module from moving forward and crushing the child arm.
  • the blocking member 19 is arranged in front of the driving wheel to prevent the driving wheel 201 from climbing forward on the child's arm.
  • the flexible blocking member 19 is located between the test arm 61 and the driving wheel 201 to prevent the driving wheel 201 from climbing up the test arm 61.
  • the driving wheel 201 can also be blocked from climbing on the child’s arm in other ways.
  • two driven wheels are arranged in front of the automatic lawn mower 1, and the diameter of the driven wheels is less than or equal to twice the diameter of the child’s arm.
  • the diameter of the driven wheel can be set to be less than or equal to 2M.
  • the diameter of the driven wheel can be set to 80mm so that the child's arm is not lower than the center line of the driven wheel, so as to avoid the driven wheel from crossing the arm, because the driven wheel is located in front of the automatic lawn mower.
  • the driven wheel cannot pass the arm, and the driving wheel cannot touch the arm.
  • the cutter head guard as shown in FIGS. 4 to 10 can also be provided under the cutting mechanism 3, so that even if the driving wheel 201 climbs on the child's arm, the child's arm can only touch the cutter head Protective parts without being able to touch the cutting element.
  • a number of water leakage holes 403 penetrating up and down can be respectively provided on the movable guard 41 and the mechanism guard 42 so that the rainwater can be discharged to the ground in time to avoid water on it.
  • water leakage holes 403 penetrating up and down can be respectively provided on the movable guard 41 and the mechanism guard 42 so that the rainwater can be discharged to the ground in time to avoid water on it.
  • the cutting mechanism 3 can be arranged near the central axis in the forward direction of the automatic lawn mower 1, or can be arranged on one side of the central axis to realize cutting to the edge, corresponding to the movable protection in the embodiment
  • the member 41 and/or the mechanism guard 42 are also arranged on one side of the central axis of the automatic lawn mower 1 in the forward direction, so as to prevent children's fingers or arms from extending into the cutting mechanism 3 while achieving cutting to the edge accidental injury.
  • the movable guard 41 and the cutting mechanism 3 are arranged on one side of the central axis as an example, because in this embodiment, the lower end 417 of the movable guard wall can move relative to the ground, as shown in FIG.
  • the movable protective member 41 also includes The movable protective wall 4149 below the element 1 prevents the user's fingers from extending into the vicinity of the cutting element 32 from below the movable shield 41.
  • the outer protective wall 14 is farther from the cutting element 32 than the movable protective wall 417.
  • the distance below the finger is less than the length of the finger. Therefore, the width of the lower movable guard wall 4149 in the direction in which the finger extends is less than the length of the finger.
  • the width of the lower movable protective wall 4149 in the direction of finger penetration that is, when the automatic lawn mower 1 is perpendicular to its forward direction In the horizontal direction, it can be set shorter, and there is even no need to set the movable protective wall 4149 below, so that the passability of the automatic lawn mower 1 is greatly improved under the premise of ensuring the safety of the user lifting the automatic lawn mower 1.
  • the movable protective wall includes a vertical protective wall extending in the up and down direction and a horizontal protective wall located below the vertical protective wall and extending in the horizontal direction. At least one side of the horizontal protective wall protrudes from the vertical protective wall. Corresponding to one side, when the movable protective wall receives the buoyancy of the grass, the force-bearing surface of the movable protective wall is larger, which can receive the lifting force of the larger grass, and enhance the passability.
  • the inner side of the horizontal protective wall protrudes from the inner side of the vertical protective wall, or the outer side of the horizontal protective wall protrudes from the outer side of the vertical protective wall, or both the inner and outer sides of the horizontal protective wall protrude from the vertical protective wall Inside and outside.
  • the width of the horizontal protective wall in the inner and outer directions is 5-50 mm.
  • the upper part of the movable protection wall 414 of the movable protection member 41 has a constant distance from the ground, and the fixed end 4111 of the movable protection wall is fixed compared to the housing 10, and the movable protection
  • the distance between the lower part of the wall 414 and the ground changes, so that the distance between the lower end 417 of the movable protective wall and the ground is variable, so as to improve the passability of the automatic lawn mower 1.
  • the distance between the lower end 417 of the movable guard wall and the ground is always less than M, so that the child's arm is blocked by the movable guard wall 414 The lower part cannot reach into the housing 10 to touch the cutting mechanism 3.
  • the movable protective wall 414 can be rotated around its upper end to achieve a change in the distance between its lower end and the ground; or as shown in Figure 35, the movable protective member 41 is a retractable , The upper end of the movable protective wall 414 is fixed compared to the housing 10, and the lower end of the movable protective wall 414 can be expanded and contracted to realize that the distance between the lower end and the ground changes.
  • the specific expansion method can be elastically deformed or sliding Groove and so on.
  • the movable guard 41 includes a baffle 46 provided on the housing 10, and the baffle 46 is provided at at least one of the front, the side, and the rear of the cutting mechanism.
  • the baffle When the baffle is set in front of the cutting mechanism, it can be called the front baffle; when the baffle is set behind the cutting mechanism, it can be called the back baffle; when the baffle is set on the side of the cutting mechanism, it can be called the side Bezel.
  • the baffle 46 includes a fixed end 4111 and a movable end 4112.
  • the fixed end 4111 is connected to the housing 10. Specifically, the fixed end is fixedly connected to the housing 10.
  • the lower end of the movable end 4112 can move compared to the bottom case 101, so that the distance between the lower end of the movable end 4112 and the ground can be changed.
  • the movable end 4112 can rotate around the fixed end 4111, so that the distance between the movable end and the ground is less than M.
  • the baffle 46 includes a movable protective wall 414 for protection, and the movable end 4112 of the baffle 46 may also be referred to as the lower end 417 of the movable floating wall.
  • the movable end 4112 in the free state, is in the initial position A, as shown in Figure 22, when the baffle 46 moves forward and encounters an obstacle, it is subjected to the direction opposite to the moving direction of the automatic lawn mower 1.
  • the external force of, the movable end 4112 rotates to the obstacle crossing limit position B.
  • the movable end 4112 of the baffle 46 can be changed at least between the initial position A and the obstacle crossing limit position B.
  • the distance between the obstacle crossing limit position B and the ground is greater than the distance between the initial position A and the ground, so that when the automatic lawn mower 1 moves forward, the baffle 46 of the movable guard 41 encounters an obstacle , It can be rotated to the obstacle crossing limit position B to increase the distance between the lower end 417 (movable end 4112) of the movable protective wall and the ground, so as to quickly pass the obstacle.
  • the rotation limit position C where the baffle 46 rotates from the outside to the inside is preset.
  • the preset safe external force value for example, an external force of 5N.
  • the rotation limit position C is the initial position A, that is, when the baffle 46 receives a force from the outside to the inside and the external force does not exceed the preset safe external force value, the baffle 46 cannot Turn inwards.
  • the rotation limit position C can also be a position where the initial position A is rotated inward by a certain angle, as long as the distance between the rotation limit position C and the ground is less than M, that is, the baffle 46 is subjected to forces from outside to inside and outside, and When the external force value does not exceed the preset safe external force value, the baffle 46 cannot reach the position where the movable end 4112 is greater than or equal to M from the ground when the baffle 46 rotates inward, so as to prevent the child's fingers from reaching in.
  • the protection limit position K for the baffle 46 to rotate from the outside to the inside is preset.
  • the protection limit position K is the rotation limit position C.
  • the protection limit position K may be different from the rotation limit position C.
  • the safe external force value and the external force threshold value are preset, and the resistance of the baffle 46 at the rotation limit position from back to front is greater than the preset safe external force value and less than the external force threshold value.
  • the baffle 46 When an external force less than the preset safe external force is applied to the baffle 46, the baffle 46 can be rotated to the rotation limit position C, and when a force greater than the external force threshold is applied to the baffle 46, the baffle 46 can cross the rotation limit Position C, reach the protection limit position K.
  • the movable end 4112 of the baffle 46 In the protection limit position K, the movable end 4112 of the baffle 46 is lower than the lowest point 30 of the cutting element, and/or the distance from the ground is less than M, so as to prevent the automatic lawn mower 1 from crushing the child arm as an obstacle. The arm was accidentally injured by the cutting element.
  • the automatic lawn mower 1 also includes a rotation limit structure 4113 for restricting the movement of the baffle from outside to inward without exceeding the rotation limit position.
  • the position of the baffle in the free state is different from the rotation limit position, and the baffle is rotating At the limit position, the resistance to rotation from outside to inward is greater than the resistance of the baffle to rotate from outside to in in the free state.
  • the distance between the lower end of the baffle and the ground is less than M.
  • the safety external force value and external force threshold value are preset, and the resistance of the baffle plate at the rotation limit position from outside to inward rotation is greater than the preset safety external force value and less than the external force threshold value so as to be greater than the external force threshold value
  • the baffle can pass the rotation limit position.
  • the baffle from the outside to the inside can pass the rotation limit position, but does not exceed the protection limit position.
  • the lower end of the baffle is always lower than The distance between the lowest point of the cutting element or the lower end of the front baffle and the ground is less than M, where 38mm ⁇ M ⁇ 40mm.
  • the automatic lawn mower also includes a mechanism guard arranged between the cutting mechanism and the baffle.
  • the mechanism guard includes a mechanism guard wall arranged between the baffle and the cutting mechanism in the horizontal direction. In the vertical direction, the mechanism guard wall The lower end is always lower than the lowest point of the cutting element.
  • the baffle 46 of the movable guard 41 is arranged behind the cutting mechanism 3.
  • the automatic lawn mower 1 includes a rear baffle arranged behind the cutting mechanism.
  • the rear baffle includes a fixed end 4111 and a movable end 4112.
  • the fixed end is connected to the housing.
  • the movable end 4112 can rotate around the fixed end to make the movable end distance The distance to the ground changes, and the automatic lawn mower also includes a rotation limit structure 4113 for restricting the rear baffle from rotating from back to front without exceeding the rotation limit position.
  • the distance between the lower end of the tailgate and the ground is less than M, where 38mm ⁇ M ⁇ 40mm.
  • the resistance of its rotation from front to back is less than the resistance of its rotation from back to front.
  • the resistance from backward to forward rotation is greater than or equal to the resistance of the rear baffle to rotate from back to forward in a free state.
  • the position of the tailgate in the free state is the same as the rotation limit position.
  • the position of the tailgate in the free state is different from the rotation limit position.
  • the resistance of the tailgate to rotate from back to forward is greater than that of the tailgate in the free state, which rotates from back to front.
  • the distance between the lower end of the rear baffle and the ground is less than M, where 38mm ⁇ M ⁇ 40mm.
  • the safe external force value and the external force threshold are preset, and the resistance of the rear baffle at the rotation limit position is greater than the preset safe external force value and less than the external force threshold.
  • the tailgate can be rotated from back to front to pass the rotation limit position, but does not exceed the protection limit position.
  • the lower end of the tailgate always lower than the lowest point of the cutting element or the distance between the lower end of the rear baffle and the ground is less than M, where 38mm ⁇ M ⁇ 40mm.
  • the automatic lawn mower 1 also includes a mechanism guard 42 arranged between the cutting mechanism 3 and the rear fence.
  • the mechanism guard includes a mechanism guard wall arranged between the rear fence and the cutting mechanism in the horizontal direction. The lower end of the protective wall of the mechanism is always lower than the lowest point of the cutting element.
  • the rotation limiting structure 4113 is at least partially disposed on the housing and/or the rear baffle.
  • the rotation limiting structure 4113 is at least partially disposed on one of the housing and the rear baffle, and when the rear baffle is in the rotation limiting position, the rotation limiting structure 4113 and the other of the housing and the rear baffle One at least partially resists, and when the two resist each other, the distance between the lower end of the tailgate and the ground is less than M, where 38mm ⁇ M ⁇ 40mm.
  • the automatic lawn mower 1 also includes a side baffle arranged on the side of the cutting mechanism 3, and the side baffle includes a side fixed end connected to the housing and a side movable end that can rotate around the side fixed end.
  • the machine also includes a side rotation limiting structure for limiting the degree of rotation of the side movable end of the side baffle from the outside to the inside.
  • the automatic lawn mower 1 also includes a front baffle arranged in front of the cutting mechanism 3.
  • the front baffle includes a front fixed end connected to the housing and a front movable end rotatable around the front fixed end.
  • the automatic lawn mower also includes The front rotation limit structure is used to limit the degree of rotation of the front movable end of the side baffle from the outside to the inside. In the horizontal direction, when the rear baffle is in a free state, the distance between the outermost edge of its movable end and the cutting element is greater than 58mm, or 63-75mm.
  • the baffle 46 receives a force from the outside to the inside.
  • the resistance of the baffle 46 to rotate from the inside to the outside is smaller than the resistance to rotate from the outside to the inside.
  • the lower end 417 (movable end 4112) of the movable protective wall is in the initial position A It is the rotation limit position C that rotates from the outside to the inside, and it is also the protection limit position K.
  • the baffle 46 can only rotate from the inside to the outside, and cannot rotate from the outside to the inside, and the distance between the initial position A and the ground is less than M, so When the child’s arm applies an external force to the movable protective wall 414 from the back, the movable protective wall 414 cannot rotate clockwise, so as to ensure that the movable protective wall 41 is subjected to an external force from outside to in in a free state.
  • the distance between the lower end 417 and the ground is always less than M, so that the child's arm cannot extend into the housing 10 under the block of the movable protective wall 414 of the baffle 46, so that the child's arm cannot touch the cutting mechanism 3.
  • the lower end 417 (movable end 4112) of the movable protection wall is a position lower than the lowest point 30 of the cutting element, when the child's arm extends into the housing 10 from back to front
  • the baffle 46 receives the force from the outside to the inside.
  • the movable end 4112 of the baffle 46 is lower than the lowest point 30 of the cutting element, so as to avoid the automatic lawn mower 1 When the child's arm was crushed as an obstacle, the child's arm was accidentally injured by the cutting element.
  • the automatic lawn mower 1 also includes a rotation limit structure 4113 for restricting the movable protective wall 414 of the baffle 46 from rotating from outside to inward to never exceed the rotation limit position C to limit the movable protection wall 414 of the baffle 46 Turn the scale.
  • the automatic lawn mower 1 includes a movable protection wall 414 for limiting the baffle 46 to rotate from the outside to the inside and never exceeds the rotation limit of the rotation limit position C.
  • the position structure 4113 and the movable protective wall 414 for restricting the baffle 46 to rotate from outside to inward never exceed the protective limit position K.
  • the movable protective wall 414 when the baffle 46 is in a free state, the movable protective wall 414 is in a vertical or approximately vertical state, so that the lower end 417 (movable end 4112) of the movable protective wall is in the process of rotating the movable protective wall 414 Therefore, when the movable protective wall 414 is subjected to the force of the obstacle in front, the distance between its rotated position and the ground is always greater than the distance between the initial position A and the ground, so as to ensure rapid passage after encountering the obstacle.
  • its rotation limit position C and protection limit position K can also be the same as the initial position A It can also be different, as long as the distance between the lower end of the baffle and the ground is less than M when the baffle is in the rotation limit position C, and the distance between the lower end and the ground is less than M when the baffle is in the protection limit position K, or the protection limit position K is always lower than The lowest point of the cutting element is 30.
  • the movable guard 41 in the moving direction of the automatic lawn mower 1, the movable guard 41 is arranged behind the cutting mechanism 3, so that the obstacle is compared with the moving direction of the automatic lawn mower 1 (from the front Backward) is opposite to the direction of the external force acting on the movable guard from the outside to the inside (from back to front), and controls the movable guard 41 to rotate in the direction in which the obstacle moves compared to the automatic lawn mower 1 to pass Obstacles, and restrict the rotation of the baffle 46 in the direction from outside to in (from back to front), so as to prevent the child's arm from passing through the baffle 46 to touch the cutting mechanism 3.
  • the moving module 20 of the automatic lawn mower 1 includes a driving wheel arranged behind the automatic lawn mower 1 and a driven wheel arranged in front of the automatic lawn mower 1.
  • the baffle 46 of the movable guard 41 behind the automatic lawn mower 1, that is, the baffle 46 is located behind the cutting mechanism 3 and is located near the rear driving wheel, which effectively prevents the driving wheel from being obstructed.
  • the driving wheel is overhead due to the padded objects, which cannot touch the ground and cannot provide driving force, which greatly improves the passability of the automatic lawn mower 1.
  • the above-mentioned baffle 46 may also be arranged in front of the cutting mechanism 3 in the advancing direction of the automatic lawn mower 1.
  • the baffle 46 receives an external force from the outside to the inside (from front to back) in the free state, the baffle 46 does not move beyond the preset moving range.
  • the distance between the lower end 417 of the movable protective wall and the ground is always less than M, so that the child’s arm cannot extend into the housing 10 under the block of the movable protective wall 414, and/or the lower end 417 of the movable protective wall is always lower than the lowest point 30 of the cutting element, so that the child’s arm cannot touch the cutting mechanism 3.
  • the lower end 417 (movable end 4112) of the movable guard wall is at the initial position A; when the automatic lawn mower 1 moves forward, it encounters an obstacle, When moved to the extreme position by the force of the obstacle, the lower end 417 of the movable protective wall (movable end 4112) is at the obstacle limit position B; when it is moved to the extreme position by the external force from the outside to the inside, the lower end of the movable protective wall 417 In the protection limit position K. Since the direction of the force acting on the movable protective wall 414 by the obstacle is the same as the direction in which the movable protective wall 414 receives the external force from the outside to the inside, the obstacle limit position B and the protection limit position K are the same.
  • the automatic lawn mower 1 also includes a restriction module (not shown) for restricting the movement range of the baffle 46 when it receives an external force from outside to inside in a free state.
  • the limit module restricts the range of movement of the movable guard 41 not to exceed the preset range of movement, so that the distance between the protection limit position K and the ground is always less than M, so that the child's arm cannot extend into the housing under the block of the movable guard wall 414 Within 10, and/or, in the up and down direction, the protection limit position K is always lower than the lowest point 30 of the cutting element, so that the child's arm cannot touch the cutting mechanism 3.
  • the above-mentioned restriction module can be a mechanical structure that directly restricts the rotation angle of the movable guard 41 to limit its moving range; it can also detect the rotation angle of the movable guard 41 electronically, when the movable guard 41 is in a free state.
  • the control module 50 controls the automatic lawn mower 1 to execute the corresponding predetermined protection instruction.
  • a protection instruction can be preset, and the protection instruction includes stopping the cutting mechanism 3, retreating the automatic lawn mower 1, stopping moving, or stopping.
  • the lower end 417 (movable end 4112) of the movable protective wall is located below the cutting mechanism 3. In the horizontal direction, the movable end 4112 is closer to the cutting element 32
  • the inside of the automatic lawn mower 1 is such that when living bodies, such as children’s fingers or small animals, extend into the cutting mechanism 3 from the movable end 4112, they are blocked by the movable protective wall 414 and cannot touch and cut from the bottom up. The element 32, thereby avoiding accidental injury by the cutting element 32.
  • a detection switch 60 for detecting the position change of the movable guard 41 is also installed on the housing 10.
  • the detection switch 60 can detect the position change of the movable guard 41 and send the detection data to the control module 50.
  • the control module 50 is used to control the automatic lawn mower 1 to execute corresponding protection instructions according to the detection information of the detection switch 60.
  • the movable guard 41 When the automatic lawn mower is running automatically, the movable guard 41 is closer to the outer wall of the housing 10 than the cutting mechanism 3.
  • the movable guard 41 is the baffle 46 as an example.
  • the movable guard 41 can also be of other types.
  • the movable guard 41 that is, the baffle 46, will first contact the grass, plants or obstacles to be cut, and then the movable guard 41 will move away from the grass relative to the housing 10 under the contact force. Moving in the direction of, the ground clearance at the bottom of the movable guard 41 will gradually increase. Therefore, the movable guard 41 can protect the cutting element 32 of the cutting mechanism 3.
  • the movable guard 41 and the housing 10 are relatively movably connected, which can be implemented in different ways.
  • the movable guard 41 and the housing 10 are connected in rotation through a rotating shaft, and can rotate relative to the housing 10 toward the cutting blade.
  • the movable guard 41 and the housing 10 may also be slidably connected, so as to be able to move up and down along the height direction of the housing 10 to move away from or close to the grass.
  • the detection switch 60 is used to detect the position information of the movable guard 41 and send the detection information to the control module 50.
  • the control module is electrically connected with the detection switch to receive detection information, and control the movement module and/or the cutting mechanism to work according to the detection information sent by the detection switch.
  • the detection switch 60 is set to not detect that the movable guard 41 reaches a predetermined limit position, and the control module 50 controls the moving module 20 to walk normally and the cutting mechanism 3 to rotate.
  • the detection switch 60 detects that the movable guard 41 reaches this At a predetermined limit position, the detection switch 60 is triggered, and the control module 50 controls the automatic lawn mower 1 to execute corresponding predetermined protection instructions, for example, the moving module 20 and/or the cutting mechanism 3 stop working, or the moving module 20 and/or the cutting mechanism are lowered 3, so as to implement cutting protection for the automatic lawn mower 1.
  • the inventor of the present invention has discovered through research that grass or plants are the cleaning objects of the automatic lawn mower 1, and the movable guard 41 needs to be able to cross the grass or plants. Grass or plants are relatively easy to fall down, so the angle at which the movable guard 41 rotates or the distance to move upward is limited. Therefore, when the movable guard 41 reaches a predetermined limit position (defined as the limit position through which vegetation passes), all objects that can pass the movable guard 41 can be regarded as grass or plants. If the rotation angle or the moving distance of the movable guard 41 is too large, it means that the movable guard 41 may have touched an obstacle and may damage the cutting blade 32. Therefore, by detecting the position of the movable guard 41, the contact object of the movable guard 41 can be known.
  • the above-mentioned predetermined limit position may be one position, and the detection switch 60 controls the automatic lawn mower 1 to execute a predetermined protection instruction through one detection; the above-mentioned predetermined limit position may also be at least two, and the detection switch 60 is based on the predetermined limit. Depending on the position, the automatic lawn mower 1 is controlled to execute different protection instructions.
  • the predetermined limit position includes a first predetermined position D and a second predetermined position E.
  • the movable guard 41 is configured to be switchable between an initial position A and a first predetermined position D relative to the housing 10.
  • the movable guard 41 In the initial position A and the first predetermined position D, the movable guard 41 has an initial ground clearance a and a first ground clearance d, respectively.
  • the initial ground clearance a and the first ground clearance d are both smaller than the clearance of the cutting element 32. Ground height, the first ground clearance d is greater than the initial ground clearance a.
  • the movable guard 41 first touches an object.
  • the movable guard 41 touches grass or plants, the movable guard 41 does not move to The first predetermined position D, so the detection switch 60 will not be triggered.
  • the movable guard 41 reaches the first predetermined position D under the action of the contact force, it means that the high probability that the movable guard 41 hits is an obstacle, but at this time the detection switch 60 has been triggered, and the control module 50 moves down.
  • the operating speed of the module 20 and/or the cutting mechanism 3. In this way, even if an obstacle hits the cutting element 32, the damage to the cutting element 32 is minimal, or even no damage, so as to achieve cutting protection.
  • the movable guard 41 can change its position relative to the housing 10, it is not necessary to reduce the ground clearance of the housing 10 while realizing cutting protection, which ensures that the automatic lawn mower has good passability.
  • the movable guard 41 may be perpendicular to the grass, and the movable guard 41 rotates when it rotates to the first predetermined position D.
  • the angle is 30 degrees. That is, it is defined as a critical point when the movable guard 41 rotates at an angle of 30 degrees. When the rotation angle reaches 30 degrees, cutting protection is implemented.
  • the initial position A may have a certain angle with the vertical direction, which is biased toward the outer wall of the housing 10.
  • the angle of rotation when the movable guard 41 rotates to the first predetermined position D is not necessarily 30 degrees, and depends on the denseness and hardness of the grass and plants on the work site.
  • the cutting protection includes reducing the operating speed of the moving module 20 and/or the cutting mechanism 3, which can be implemented alternatively or simultaneously.
  • the detection switch 60 is triggered, and the control module 50 can reduce the walking speed of the moving module 20 and at the same time reduce the rotation speed of the cutting mechanism 3.
  • the detection switch 60 can be a contact switch, such as a pressure sensor, a Hall switch, etc., and can adapt to the harsh operating environment under the housing 10. Specifically, the detection switch 60 may be disposed under the housing 10, and when the movable guard 41 rotates to the first predetermined position D, it touches the detection switch 60, thereby triggering the detection switch 60, and the detection switch 60 generates a trigger signal.
  • the detection switch 60 may also be a non-contact sensor, such as an ultrasonic sensor.
  • a detection switch 60 is added to detect the position change of the movable guard 41.
  • the control module 50 receives the detection data of the detection switch 60, it can change the input current of the mobile module 20 and the cutting mechanism 3 through the control circuit to achieve deceleration, and can realize the reverse movement of the mobile module 20 by changing the direction of the input current. .
  • the movable guard 41 is at the first predetermined position D, and when the detection switch 60 is triggered, the control module 50 controls the moving module 20 to decelerate to a predetermined speed, decelerate to zero and walk in reverse, or decelerate to zero; and / Or control the cutting mechanism 3 to decelerate to a predetermined speed greater than zero, or decelerate to zero.
  • the mobile module 20 may continue to advance after deceleration, or decelerate to zero and walk in the reverse direction, that is, move backward, or decelerate to zero, and then brake.
  • the cutting mechanism 3 can continue to rotate after deceleration, or simply brake to stop. In other words, both the moving module 20 and the cutting mechanism 3 are decelerated first, but the degree of deceleration can be flexibly set, and the retreat can be regarded as a special deceleration.
  • the movable guard 41 also has a second predetermined position E relative to the housing 10. At the second predetermined position E, the movable guard 41 has a second ground clearance e, The second ground clearance is greater than the first ground clearance. In other words, at the second predetermined position E, the height of the movable guard 41 from the ground is greater and farther from the grass.
  • the movable guard 41 In actual operations, if the movable guard 41 reaches the first predetermined position D, it is warned that the movable guard 41 may touch an obstacle, but there are also relatively hard vegetation. In this case, the movable guard 41 will pass the first predetermined position D and at least the automatic lawn mower 100 is not expected to stop at this time.
  • a second predetermined position E is also provided.
  • the detection switch 60 is triggered and a first trigger signal is generated, and the control module 50 controls the moving module to decelerate to a predetermined speed greater than zero to continue moving forward.
  • the detection switch 60 is triggered and a second trigger signal is generated, and the control module 50 controls the moving module 20 to decelerate to zero and then walk backwards, or brake the moving module 20. That is, when the detection switch 60 is triggered for the first time, the mobile module decelerates and advances.
  • the detection switch 60 is a contact switch arranged on the housing 10, and the movable guard 41 can trigger the detection switch when it reaches the first predetermined position D; the movable guard 41 reaches the second The detection switch 60 can be triggered again at the predetermined position E. That is, the movable guard 41 triggers the detection switch 60 only when it reaches the first predetermined position D or the second predetermined position E.
  • the detection switch 60 is a sliding resistance switch arranged on the housing 10, and the movable guard 41 is connected to a movable part of the sliding resistance switch. In this way, the detection switch 60 is always triggered, but the trigger signal is different when the movable guard 41 reaches the first predetermined position D and the second predetermined position E. For example, the value of the feedback current signal to the control module 50 is different. This allows the control module 50 to generate different control commands.
  • the housing 10 has a front end 110 and a rear end 120, the direction from the rear end 120 to the front end 110 is defined as the forward direction of the automatic lawn mower 100, and the direction from the front end 110 to the rear end 120 defines It is the backward direction of the automatic lawn mower 100.
  • the direction perpendicular to the forward or backward direction is defined as the left-right direction.
  • the movable guard 41 is at least partially located between the front end 110 and the cutting mechanism 3, or at least partially located between the rear end 120 and the cutting mechanism 3.
  • the movable guard 41 is arranged on the front side or the rear side of the cutting mechanism 3, and the automatic lawnmower 100 protects the cutting mechanism 3 when it moves forward or backward.
  • the movable guard 41 may also be at least partially arranged on the rear side of the cutting mechanism 3 to protect the cutting mechanism 3 when the automatic lawn mower 100 is retreating. It is also possible that the cutting mechanism 3 has movable guards 41 on the front and rear sides.
  • the movable guard 41 is located between the front end 10 and the cutting mechanism 3 as a whole.
  • the movable guard 41 may have a plate shape.
  • the movable guard 41 may be comb-shaped. Specifically, the bottom of the movable guard 41 close to the grass is provided with a plurality of grass inlet holes 510.
  • the gap of the movable grass inlet 4147 is set to 60-40mm, which only allows grass and plants to pass, but can block obstacles from passing.
  • the movable guard 41 is located on the left or right side of the cutting blade, or the cutting mechanism 3 has movable guards 41 on the left and right sides; and the movable guard 41 is movable
  • the guard 41 at least partially extends between the front end 110 and the cutting mechanism 3, or at least partially extends between the rear end 120 and the cutting mechanism 3.
  • FIG. 41 there are movable guards 41 on both sides of the cutting mechanism 3.
  • the movable guard 41 is substantially arc-shaped, so that the first of the two ends 410 extends between the front end 110 and the cutting mechanism 3, and the second of the two ends 410 extends to the rear end 120 and the cutting mechanism 3 between. In this way, when the automatic lawn mower 100 moves forward or backward, the end 410 of the movable guard 41 can contact the obstacle before the cutting mechanism 3, so that it can play a protective role.
  • movable guards 41 there are movable guards 41 around the cutting mechanism 3. Specifically, as shown in FIG. 41, one way is: multiple movable guards 41 are arranged at intervals around the circumference of the cutting mechanism 3. As shown in Figure 41, another way is: the movable guard 41 surrounds the cutting mechanism 3 for a week. At this time, the movable guard 41 can be an integral type, or a plurality of movable guards 41 can be spliced together. .
  • the movable guard 41 and the housing 10 may also be slidably connected so as to be able to move up and down along the height direction of the housing 10 to move away from or close to the grass.
  • the bottom of the movable guard 41 has a chamfer 430 on the side away from the cutting mechanism 3. In this way, the grass and plants will first touch the chamfer 430, and then fall more easily and then pass the movable guard 41. In this way, the movable guard 41 needs a small moving distance, and the space under the housing 10 that needs to be occupied is small, which is beneficial to the structure compact.
  • the surface of the movable guard 41 at the chamfer 430 is a convex arc surface, which makes it easier for grass and plants to pass the movable guard 41.
  • the automatic lawn mower 100 further includes a thermal infrared sensor 70 for detecting living organisms, and the thermal infrared sensor 70 is disposed on the movable guard 41 away from the cutting mechanism 3.
  • the control module 50 is used to receive the detection data of the thermal infrared sensor 70 to implement cutting protection for the automatic lawn mower. After the thermal infrared sensor 70 detects a living body, it implements cutting protection for the automatic lawn mower to avoid injury.
  • the cutting protection here can be implemented in multiple ways.
  • the cutting protection is to brake the cutting mechanism 3, and/or make the mobile module 20 drive the housing 10 to travel in reverse; and/or make the mobile module 20 drive the housing 10 to turn.
  • the thermal infrared sensor 70 detects a living body, one or more of the braking and cutting mechanism 3, and the automatic lawn mower 100 can be moved back or turned to implement cutting protection.
  • the above-mentioned embodiment in which only one end of the movable guard 41 is movable can also be combined with the embodiment of the mechanism guard 42.
  • the automatic lawn mower 1 further includes a baffle 46 arranged in the horizontal direction.
  • the mechanism guard 42 between the cutting mechanism 3 and the cutting mechanism 3 includes a mechanism guard wall 424 disposed between the baffle 46 and the cutting mechanism 3 in the horizontal direction. In the vertical direction, the lower end 417 of the mechanism guard wall Always lower than the lowest point of the cutting element.
  • the specific structure of the mechanism guard 42 can be referred to the above-mentioned embodiment with the mechanism guard 42, which will not be repeated here.
  • the movable guard 41 in the forward direction of the automatic lawn mower 1, includes at least two relatively independent movable guards.
  • the movable guard 41 includes a front movable guard 47 which is arranged at least in front of the automatic lawn mower 1 and is provided with a front movable guard wall 474, and is arranged at least at the rear of the automatic lawn mower 1 and is provided with rear movable guards.
  • the protective member 48 can be moved behind the protective wall 484.
  • the front movable guard 47 and the rear movable guard 48 can be called sub movable guards.
  • the front movable guard 47 and the rear movable guard 48 are arranged independently, and the front movable guard 47 and the rear movable guard 48 are not connected, so that the front movable guard 47 and the rear movable guard 48 are subjected to external force
  • the lower end 477 of the front movable protective wall (the lower end of the front movable protective wall 474) and the lower end 487 of the rear movable floating wall (the lower end of the rear movable protective wall 484) move independently from the ground. Due to the complicated internal structure of the automatic lawn mower 1, if an integral movable guard 48 is formed on the automatic lawn mower 1, some parts are difficult to design due to insufficient space.
  • the movable guard 41 is designed At least two independent sub-movable guards can be arranged according to the space on the automatic lawn mower 1, so that the overall structure of the automatic lawn mower 1 can be arranged more compactly.
  • the front movable guard 47 when the current movable guard 47 receives a vertical upward force, the front movable guard 47 can move in the up and down direction.
  • the rear movable guard 48 receives a vertical upward force, the rear movable guard 48 cannot move in the up and down direction.
  • the front movable guard 47 may be the aforementioned movable guard that moves upwards as a whole under the action of external force, or it may be a movable guard that realizes the movement of its movable end from bottom to top through expansion or contraction.
  • the front movable guard 47 also includes side movable guard walls 475 arranged on both sides of the automatic lawn mower 1.
  • the side movable guard walls 475 and the front movable guard walls 475 are connected to each other, so that the current movable guard 47 When subjected to an external force, the side movable protection wall 475 and the front movable protection wall 475 move in the up and down direction synchronously.
  • the automatic lawn mower 1 also includes a protective member upward guiding mechanism 45 for guiding the front movable guard 47 to move in the up and down direction compared to the housing. When the current movable guard 47 moves upward by an external force, the front movable guard 47 is movable
  • the protective wall 474 and the side movable protective wall 475 move upward as a whole.
  • the rear movable guard 48 includes a baffle 46 with one end fixed to the housing.
  • the baffle 46 includes a fixed end 4111 fixed to the housing and a movable end 4112 that can rotate around the fixed end 4111 by an external force.
  • the front movable guard 47 When the automatic lawn mower 1 moves on the grass, under the action of the bottom-up lifting force of the grass, the front movable guard 47 is forced to move from bottom to top to avoid pressing the grass or reducing the height of the grass. The distance between the small cutting element and the lower end 474 of the front movable guard improves the cutting quality. Since the cutting mechanism 3 of the automatic lawn mower 1 is in front of the rear movable guard 48, when the rear movable guard 48 moves above the grass, the grass has already been cut and does not cause the grass to be pressed.
  • the housing 10 also includes an outer protective wall 14 located outside the movable protective member 41.
  • the distance between the lower end of the outer protective wall 14 and the ground is less than 75 mm to prevent adult arms from extending into the cutting mechanism 3. In one embodiment, the distance between the lower end of the outer protective wall 14 and the ground is 35-55 mm. While preventing adult arms from extending into the cutting mechanism 3, it also restricts children's arms from extending upward into the housing 10 from below the outer protective wall 14 The angle of inclination when inside is used to reduce the risk of the child's arm tilting upward and touching the cutting mechanism 3.
  • the automatic lawn mower 1 includes at least two guards, an inner guard 91 with an inner guard wall 911 and an outer guard 92 with an outer guard wall 921, respectively.
  • the outer protective wall 921 is located outside the cutting mechanism 3
  • the inner protective wall 911 is located between the outer protective wall 921 and the cutting mechanism 3; at any cutting height, the outer protective member 92 is in a free state without external force
  • the distance from the lower end of the outer protective wall 921 to the ground is less than M, where 38mm ⁇ M ⁇ 40mm, to prevent children's fingers from extending into the cutting mechanism 3.
  • the lower end of the inner protective wall 911 is always lower than the lowest point of the cutting element, so as to prevent the dynamic child arm from touching the cutting element 32 when it extends in.
  • the inner guard 91 and the outer guard 92 can be movable guards or non-movable fixed parts, respectively.
  • the inner guard 91 and the outer guard 92 are both immovable fixed parts.
  • the outer guard 91 includes a fixed guard that is fixed in the up-down direction compared to the bottom case 101.
  • the outer guard wall 911 of the fixed guard may be a part of the housing.
  • the distance between the fixed guard and the ground is less than M and greater than M/2.
  • the inner guard 91 is a mechanism guard that is fixed in the up and down direction compared to the cutting mechanism.
  • the inner protective wall 911 includes a front inner protective wall 912 located in front of the cutting mechanism 3, inner protective walls 913 on both sides of the cutting mechanism, and inner protective walls 913 located on both sides of the cutting mechanism. At least one of the rear inner protective walls 914 at the rear.
  • the inner protective wall 911 includes a front inner protective wall 912 located in front of the cutting mechanism, two side inner protective walls 913 located on both sides of the cutting mechanism, and a rear inner protective wall 914 located behind the cutting mechanism 3.
  • the front inner protective wall and the rear inner protective wall jointly enclose a circumferentially closed inner protective wall 911, and the bottom of the inner protective wall 913 in the 360-degree circumferential direction is lower than the lowest point of the cutting element.
  • the lower end of the inner protective wall 911 is a continuous smooth surface.
  • the bottom of the inner protective wall in the 360-degree circumferential direction can also be at least partly higher than the lowest point of the cutting element, and partly lower than the lowest point of the cutting element, and the part higher than the lowest point of the cutting element is at
  • the continuously extending length in the circumferential direction is less than M, so that even if the child arm extends into the cutting mechanism, it cannot touch the cutting element.
  • the cutting mechanism 3 can be fixed in the vertical direction or can move relatively. Take the cutting mechanism 3 and the bottom case 101 being relatively fixed in the vertical direction as an example.
  • the cutting mechanism 3 and the bottom case 101 are relatively fixed in the upper and lower directions.
  • the automatic lawn mower 1 further includes a cutter head 31 for installing a cutting element 32, and the cutting element 32 is arranged above the cutter head 31.
  • the automatic lawn mower 1 also includes a bottom guard 95 arranged below the cutting mechanism 3.
  • the bottom of the bottom guard 95 is a smooth plane, and a cutting element 32 and a fastener 33 are provided between the bottom guard 95 and the cutting mechanism 3 ⁇ chamber 951.
  • the cutting element 32 is partially contained in the cavity 951.
  • the bottom guard 95 is assembled below the cutting mechanism 3 as an example.
  • the bottom guard 95 and the cutting mechanism 3 may be partially integrally formed, for example, directly extending from the cutting mechanism 3 partially.
  • the bottom guard 95 in this embodiment may have the structure of the cutter head guard 35 as shown in FIG. 10, of course, it may also have other structures.
  • the distance between the bottom guard 95 and the cutting element 32 is 0-30mm; in the left and right direction, the distance between the bottom guard 95 and the inner guard 91 is 10-30mm.
  • the inner guard 91 may be the embodiment shown in FIGS. 1 to 10, or in other embodiments above, the mechanism guard 42 is fixed compared to the cutting mechanism 3 in the vertical direction.
  • the cutting mechanism 3 can move up and down compared to the bottom shell 101 by an external force, under the action of the external force, the cutting mechanism 3 and the inner guard 91 can move up and down compared to the bottom shell together.
  • the inner protective member 91 may also be the embodiment shown in FIGS. 1 to 10, or the movable protective member 41 provided with a movable protective wall 414 in other embodiments above.
  • the movable guard 41 arranged inside the outer guard can also be referred to as an inner movable guard. Under the action of external force, the inner movable guard can move up and down compared to the cutting mechanism 3; and at any cutting height, under the action of external force, the lower end of the inner movable guard wall is always lower than The lowest point of the cutting element.
  • the automatic lawn mower 1 Under at least one cutting height, when the inner movable guard is moved up and down by external force, the lower end of the inner movable guard wall can move up and down compared to the cutting mechanism, and the automatic lawn mower 1 also It includes a limit mechanism for limiting the relative position of the cutting mechanism and the inner movable guard. Under the restriction of the limit mechanism, the lower end of the inner movable guard wall is always lower than the lowest point of the cutting element.
  • the specific structure of the movable guard 41 please refer to the other embodiments above, and will not be repeated.
  • the outer guard 92 may also be the embodiment shown in FIGS. 1 to 10, or the movable guard 41 in the other embodiments above.
  • the movable guard 41 arranged outside the inner guard can also be called an outer movable guard, and the movable guard wall on the outer movable guard can also be called an outer movable guard wall.
  • the outer guard includes an outer movable guard provided with an outer movable guard wall. Under the action of external force, the lower end of the outer movable protective wall can be displaced up and down compared to the bottom shell, and at any cutting height, the outer movable guard is in a free state, The distance between the lower end of the movable protective wall and the ground is less than M.
  • the outer guard 92 can also be of two-piece type. Specifically, the outer guard 92 includes a fixed guard 923 that is fixed in the up and down direction compared to the bottom shell 101 and a movable guard wall. The outer movable guard 924, under the action of external force, the lower end of the outer movable guard wall 9241 can move up and down compared to the bottom shell, and at any cutting height, the outer movable guard In the free state, the distance between the lower end of the outer movable protective wall 9241 and the ground is less than M.
  • the fixed guard 923 includes an outer guard wall 14 arranged on the housing, the outer guard wall 14 is arranged at least in front of the cutting mechanism, and the outer movable guard 924 includes a rear baffle arranged at least behind the cutting mechanism.
  • the distance between the outer guard and the ground can be 19-38mm.
  • the minimum distance range between the inner guard and the outer guard in the horizontal direction can be 2-30mm, or 2-8mm, to prevent the inner guard and the outer guard from interfering with each other during movement.
  • the automatic working system also includes a guide line.
  • the automatic lawn mower 1 also includes a guide line detection module (not shown).
  • the guide line detection module includes at least one guide line detection sensor for detecting the difference between the automatic lawn mower and the guide line. The positional relationship between.
  • the positional relationship between the automatic lawn mower and the guide line includes that the automatic lawn mower is located on one of the two sides of the guide line, or the distance between the automatic lawn mower and the guide line, and the like.
  • the guide line includes a boundary line, which defines the working area of the automatic lawn mower.
  • the guide wire may also be a wire arranged in the work area, which is drawn from the location of the docking station, and used to guide the automatic lawn mower to move to the docking station.
  • the guide line can also be a physical boundary formed by a fence or the like, or a physical boundary formed between a lawn and a non-turf.
  • the guide line detection sensor can be a camera, a capacitance sensor, and so on. In other embodiments, there may be no guide line.
  • the working area of the automatic lawn mower is directly controlled by a capacitive sensor or GPS positioning.
  • a threshold is preset.
  • the control module 50 controls the automatic lawn mower 1 to move along the boundary line to the docking station, so that the automatic lawn mower 1 returns to the charging station to supplement the energy module with electric energy.
  • 50 When controlling the automatic lawn mower 1 to move along the boundary line to the docking station, control the automatic lawn mower 1 by changing the distance between itself and the boundary line, and then control the automatic lawn mower 1 to move in a direction parallel to the boundary line At least the first preset distance, and repeat the above steps, so that the control module 50 controls the automatic lawn mower 1 to return to the charging station.
  • the automatic lawn mower 1 may also return to the charging station in other ways.
  • the automatic lawn mower 1 may also pass a preset time or other parameters. When the specified time or other parameters are reached, the control module 50 controls the automatic lawn mower 1 to automatically return to the charging station to supplement electric energy.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

一种自动割草机(1),其包括设有底壳(101)的壳体(10)、移动模块(20)、具有切割元件(32)的切割机构(3)及控制模块(50);所述自动割草机(1)还包括设有防护壁(40)的防护组件(4),在水平方向上,所述防护壁(40)设置于所述切割机构(3)的外侧,所述防护组件(4)至少包括可活动防护件(41),所述防护壁(40)至少包括设置于所述可活动防护件(41),且在水平方向上位于所述切割机构(3)的外侧的可活动防护壁(414),所述切割机构(3)处于任意切割高度下,当所述可活动防护件(41)处于不受外力的自由状态时,所述可活动防护壁(414)的下端的离地距离为初始距离,所述初始距离始终小于M,且38mm≤M≤40mm,所述可活动防护件(41)在外力作用下可相较于所述底壳(101)在上下方向上运动,以改变所述可活动防护壁(414)的下端的离地距离。

Description

自动割草机
本申请要求了申请日为2019年06月18日,申请号为201910523837.7和申请日为2020年04月17日,申请号为202010307394.0和申请日为2019年11月04日,申请号为201921884636.1的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种自动割草机。
背景技术
随着计算机技术和人工智能技术的不断进步,类似于智能机器人的自动割草机已经开始慢慢的走进人们的生活。自动割草机能够自动在用户的草坪中割草、充电,无需用户干涉。这种自动工作系统一次设置之后就无需再投入精力管理,将用户从清洁、草坪维护等枯燥且费时费力的家务工作中解放出来。
自动割草机自动在草地上行走和割草,其包括用于切割的切割元件,为了避免自动割草机的切割元件误伤人手指或手臂等,必须在切割元件外设置阻挡人手指或手臂的防防护件,可是满足自动割草机的通过性,其防防护件不能设置的过低,因为防防护件设置的距离地面过低,会导致自动割草机通过性很差;而为了满足通过性的情况下,防护件又无法阻挡儿童的手指和手臂伸入自动割草机内,很容易造成儿童被自动割草机误伤。
因此,有必要设计一种具有新的防护组件的自动割草机,以解决上述问题。
发明内容
为克服上述缺陷,本发明采用如下技术方案:一种自动割草机,其包括:
壳体,设有底壳;
移动模块,设置于所述壳体下方,用于带动所述自动割草机移动;
切割机构,设置于所述壳体以执行预定切割高度的切割任务,所述切割机构包括用于切割的切割元件;
控制模块,用于自主控制所述移动模块带动所述自动割草机移动,并自主控制所述切割机构执行切割任务;
所述自动割草机还包括设有防护壁的防护组件,在水平方向上,所述防护壁设置于所述切割机构的外侧,所述防护组件至少包括可活动防护件,所述防护壁至少包括设置于所述可活动防护件,且在水平方向上位于所述切割机构的外侧的可活动防护壁,所述切割机构处于任意切割高度下,当所述可活动防护件处于不受外力的自由状态时,所述可活动防护壁的下端的离地距离为初始距离,所述初始距离始终小于M,且38mm≤M≤40mm,所述可活动防护件在外力作用下可相较于所述底壳在上下方向上运动,以改变所述可活动防护壁的下端的离地距离。
进一步的,所述切割机构处于任意切割高度下,所述初始距离的范围为15-35mm。
进一步的,所述切割机构处于任意切割高度下,所述可活动防护件在受外力作用下,所述可活动防护件可相较于所述底壳向上运动,以使所述可活动防护壁的离地距离增大,当所述外力消除时,所述可活动防护件可相较于所述底壳向下运动,以使所述可活动防护壁的下端的离地距离回到所述初始距离。
进一步的,在将所述切割机构高度由最低档调节至最高档的过程中,所述切割机构可相较于所述可活动防护件在上下方向上运动。
进一步的,在调节所述切割机构高度过程中,所述可活动防护壁的下端距离地面的距离始终保持不变。
进一步的,在所述可活动防护壁受力向上运动过程中,当所述可活动防护壁的下端距地面距离大于一预设草安全抬起高度时,所述可活动防护壁向上运动的阻力大于,当所述可活动防护壁的下端距地面距离小于所述预设草安全抬起高度时,所述可活动防护壁向上运动的阻力。
进一步的,所述可活动防护壁包括设置于所述切割机构的前方的前可活动防护壁、设置于所述切割机构后方的后可活动防护壁以及设置于所述切割机构两侧的侧边可活动防护壁中的至少一个。
进一步的,在水平方向上,所述可活动防护壁的最外缘距所述切割元件 的最小距离X的范围为X≥58mm。
进一步的,所述可活动防护壁包括主活动部,所述主活动部包括位于其最外缘的障碍物通过区,所述障碍物通过区包括由外向内倾斜向下延伸的倾斜面。
进一步的,所述可活动防护壁还包括自所述主活动部向下延伸形成的锁定部,所述锁定部包括位于其最外缘的安全锁定区,所述安全锁定区的下端离地距离小于M,所述安全锁定区位于与其同一径向上的障碍物通过区向下的延长线的外侧。
进一步的,所述可活动防护壁包括设置于其底部的若干在周向上间隔设置的阻挡凸起,所述可活动防护件在不受外力的自由状态下,所述阻挡凸起的下端离地大于等于M/2。
进一步的,所述可活动防护壁还包括连接于所述阻挡凸起上方的上阻挡部,所述阻挡凸起的最外缘与所述上阻挡部的外边缘不完全重叠,所述阻挡凸起的不与所述上阻挡部最外缘重叠的部分位于所述上阻挡部的最外缘的对应部分的内侧。
进一步的,所述阻挡凸起包括位于其最外缘的安全锁定区,所述安全锁定区包括倾斜面和/或竖直面,当所述安全锁定区为由外向内倾斜向下延伸的倾斜面时,所述安全锁定区自所述安全锁定区的最外端所在的竖直平面向内倾斜的角度小于15度。
进一步的,所述阻挡凸起的高度h的范围为:0mm<h≤80mm,或3mm≤h≤20mm;所述阻挡凸起的宽度M的范围为0<m≤40mm,或0<m≤20mm;两相邻的所述阻挡凸起之间的距离S的范围为0<S≤40mm,或3≤S≤25mm。
进一步的,所述可活动防护壁还包括在上下方向上延伸的连接相邻两阻挡凸起的连接凸起,所述连接凸起局部向内凹陷以使所述连接凸起与其所连接的两相邻的所述阻挡凸起共同围成外侧间隔,且内侧封闭的结构。
进一步的,所述切割机构处于任意切割高度下,所述初始距离的范围始终小于等于M/2。
进一步的,所述可活动防护壁受外力向上运动到其可活动范围的最高点的过程中,所述阻挡壁的下端始终低于所述切割元件的最低点。
进一步的,所述防护组件还包括在上下方向上相较于所述切割机构固定的机构防护件,所述机构防护件包括在水平方向上,位于所述可活动防护壁 和所述切割机构之间的机构防护壁,所述阻挡壁还包括所述机构防护壁,所述机构防护壁的下端始终低于所述切割元件的最低点。
进一步的,所述壳体包括在水平方向上位于所述切割机构外部的高位壳体,在由外向内的方向上,且在垂直于所述由外向内的方向上延伸M范围内,所述高位壳体距地面的距离始终高于M,在水平方向上,至少部分所述机构防护壁位于所述高位壳体与所述切割机构之间。
进一步的,所述机构防护壁包括位于所述切割机构前方的前机构防护壁、位于所述切割机构两侧的侧边机构防护壁、及位于所述切割机构后方的后机构防护壁,所述前机构防护壁、后机构防护壁及侧边机构防护壁共同围成周向上封闭的所述机构防护壁。
进一步的,所述机构防护壁在360度的周向上的最底部均低于所述切割元件最低点。
进一步的,所述可活动防护壁与机构防护壁在水平方向上的最小距离范围为2~30mm,或2~8mm。
进一步的,所述切割机构处于任意切割高度下,所述可活动防护壁受外力向上运动到其可活动范围的最高点时,所述可活动防护壁的下端低于所述切割元件最低点。
进一步的,在至少一档切割高度下,当所述可活动防护件受外力在上下方向上运动的过程中,所述可活动防护壁的下端可相较于所述切割机构在上下方向上运动。
进一步的,所述自动割草机还包括用于限制所述可活动防护件与所述切割机构在上下方向上相对运动的程度的限位结构。
进一步的,所述限位机构包括可相互抵持限位的切割限位部与防护件限位部,所述切割限位部与所述切割机构在上下方向上相对固定,所述防护件限位部与所述可活动防护件在上下方向上相对固定,所述切割限位部与所述防护件相互抵持限位时,所述切割限位部位于所述防护件限位部上方。
进一步的,在非调高状态下,当所述切割机构受外力作用时,所述切割机构可相较于地面在上下方向上移动,在至少一档切割高度下,当所述可活动防护件受外力向上运动的过程中,所述可活动防护件先单独向上运动至其与所述切割机构相互限位,再与所述切割机构一起向上运动。
进一步的,所述防护组件还包括在上下方向上相较于所述切割机构固定 的切割防护件,在水平方向上,所述切割防护件设置于所述可活动防护件内,所述切割防护件的下端低于所述切割元件的最低点,在非调高状态下,所述切割防护件在外力作用下,可与切割机构一起相较于所述底壳在上下方向上运动。
进一步的,所述切割机构包括用于固定所述切割元件的刀盘,所述切割防护件包括设置于所述刀盘下方且围绕一中部空腔设置的刀盘防护件,所述刀盘防护件的下端低于所述切割元件的最低点。
进一步的,所述自动割草机还包括设置于所述壳体底侧的可弯折的柔性阻挡件,在所述自移动设备前进方向上,所述阻挡件位于所述移动模块的前侧和/或后侧,所述阻挡件包括固定于所述壳体底侧的壳体端,和受外力作用下可相较于所述壳体端运动的自由端,所述壳体端与所述移动模块间隔设置,所述自由端在外力作用下可与所述移动模块抵持接触。
进一步的,所述自动割草机还包括用于安装所述切割元件的刀盘,所述切割元件设置于所述刀盘的上方。
进一步的,在所述自动割草机移动的过程中,当所述可活动防护壁受由外向内的力作用时,所述可活动防护壁的下端相较于地面的距离可大于等于M,其中,38mm≤M≤40mm。
进一步的,所述可活动防护壁的下端在上下方向上移动的距离范围为15-80mm,或20-40mm。
进一步的,所述可活动防护壁包括位于其下端,且沿周向连续延伸的压草端面。
进一步的,所述可活动防护壁包括沿上下方向延伸的竖防护壁及位于所述竖防护壁下方且沿水平方向延伸的横防护壁,所述横防护壁在水平的内外方向上的至少一侧突出于所述竖防护壁的对应侧。
进一步的,所述自动割草机还包括用于连接所述可活动防护件与所述壳体的防护件向上引导机构,当所述可活动防护件受到由外向内的力的作用时,所述防护件向上引导机构允许所述可活动防护壁向上运动。
进一步的,所述向上引导机构包括四连杆、两连杆、单杆或滑槽中至少一个。
进一步的,所述自动割草机还包括用于连接所述切割机构与所述壳体的切割向上引导机构。
进一步的,所述可活动防护件包括上防护件和下防护件,当所述下防护件受到外力作用时,所述下防护件可相较于所述上防护件在上下方向上移动。
进一步的,所述可活动防护件设置于所述壳体外侧、和/或设置于所述切割机构与所述壳体之间和/或连接于所述壳体的局部。
进一步的,所述可活动防护壁包括设置于所述切割机构前方的前可活动防护壁,所述防护组件还包括设有后可活动防护壁的后可活动防护件,所述后可活动防护壁设置于所述切割机构的后方,当所述后可活动防护件受外力作用时,所述后可活动防护壁的下端相较于地面可产生上下方向上的相对位移。
进一步的,在外力作用下,所述可活动防护件与所述后可活动防护件可相对独立运动。
进一步的,所述后可活动防护件包括一端固定于所述壳体上的挡板,所述挡板包括固定于所述壳体的固定端及受外力可绕所述固定端转动的活动端。
进一步的,当所述前可活动防护件受到竖直向上的作用力时,所述前可活动防护件能够在上下方向上移动;而当所述后可活动防护件受到竖直向上的作用力时,所述后可活动防护件无法在上下方向上移动。
进一步的,所述可活动防护壁还包括设置于所述自动割草机两侧的侧边可活动防护壁,所述前可活动防护壁与所述侧边可活动防护壁相互连接,以使所述侧边可活动防护壁与所述前可活动防护壁受外力作用时可同步在上下方向上运动。
本方案的有益效果是:通过设置具有防护壁的防护组件,以在避免儿童的手指和手臂等被误伤的同时,保证自动割草机的通过性。
附图说明
图1是本发明一实施例自动割草机的立体图。
图2是图1所示自动割草机另一角度视图。
图3是图1所示自动割草机另一角度视图。
图4是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图5是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图6是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图7是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图8是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图9是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图10是本发明一实施例中自动割草机的切割机构及防护组件位于一侧的示意图。
图11是本发明一实施例中自动割草机的切割机构及可活动防护件的示意图。
图12是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图13是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图14是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图15是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图16是本发明一实施例中自动割草机的一种防护组件示意图。
图17是本发明一实施例中自动割草机的一种防护组件示意图。
图18是本发明一实施例中自动割草机的一种防护组件示意图。
图19是本发明一实施例中自动割草机的一种防护组件示意图。
图20是本发明一实施例中自动割草机的一种防护组件示意图。
图21是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图22是图21所示的自动割草机的另一状态示意图。
图23是图21所示的自动割草机的另一状态示意图。
图24是本发明一实施例中自动割草机的防护组件的一种状态示意图。
图25是图24所示的另一角度视图。
图26是本发明一实施例中可活动防护件最外缘示意图。
图27是本发明一实施例自动割草机示意图。
图28是图27所示自动割草机另一状态示意图。
图29是图27所示自动割草机另一状态示意图。
图30是本发明一实施例自动割草机示意图。
图31是图30所示自动割草机另一状态示意图。
图32是图30所示自动割草机另一状态示意图。
图33是本发明一实施例自动割草机示意图。
图34是图33所示自动割草机抬起示意图。
图34是图33所示自动割草机抬起示意图。
图35为本发明一实施例中一种可活动防护件的示意图。
图36为本发明一实施例中自动割草机的示意图。
图37为图36所示的可活动防护件的一种状态示意图。
图38为图36所示自动割草机的仰视示意图。
图39为图36中的可活动防护件的一种结构示意图。
图40为图36中的可活动防护件的另一种结构示意图。
图41为图36所示的可活动防护件在自动割草机中的另一种布置方式的示意图。
图42为图36所示的可活动防护件在自动割草机中的又一种布置方式的示意图。
图43为本发明一实施例中可活动防护件与机构防护件的示意图。
图44为图43所示的可活动防护件受到非法向外力时的受力示意图。
图45为图43所示的可活动防护件受到非法向外力时的受力示意图。
图46为本发明一实施例中具有阻挡凸起的可活动防护件与机构防护件的示意图。
图47为图46所示的可活动防护件受到非法向外力时的受力示意图。
图48为图46所示的可活动防护件受到非法向外力时的受力示意图。
图49为图46所示的可活动防护件距地面距离小于等于M/2时,其受到非法向外力时的受力示意图。
图50为图46所示的可活动防护件距地面距离小于等于M/2时,其受到非法向外力时的受力示意图。
图51为本发明一实施例中具有连接凸起的可活动防护件与机构防护件的示意图。
图52至图54为图51所示的可活动防护件遇到草时,草的状态的示意图。
图55为图51的局部放大图。
图56为本发明另一实施例中具有连接凸起的可活动防护件与机构防护件的示意图。
图57为本发明一实施例中自动割草机单轮碾压童臂的示意图。
图58为本发明一实施例中自动割草机具有阻挡件的示意图。
图59为本发明一实施例中自动割草机刀盘下方具有刀盘防护件的示意图。
图60为本发明一实施例中自动割草机的示意图。
图61为图60所示的自动割草机的俯视图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
如图1至图34所示,本发明提供了一种自动工作系统,其包括自主移动和工作的自动割草机1及用于给自动割草机1充电的充电站。自动割草机1包括设有底壳101的壳体10、设置于壳体10下方且用于带动自动割草机1移动的移动模块20,用于执行预定切割高度的切割任务的切割机构3,用于提供动力的动力模块,用于自动控制移动模块带动自动割草机1移动并且自主控制切割机构执行切割任务的控制模块,及用于提供能量的能源模块5。
切割机构3可旋转的固定于壳体10下方,切割机构3包括可旋转的固定于壳体10下方的刀盘31、固定于刀盘31上的若干切割元件32及用于将切割元件32固定于刀盘31的紧固件33,本实施例中,切割机构3还包括可旋转的固定于壳体10下方的旋转部36,刀盘31固定于旋转部36上,可跟随旋转部36旋转。切割元件32为切割刀片,切割刀片均匀的固定于刀盘31的圆周上,以跟随刀盘31一起旋转。在一实施例中,切割机构3包括3个切割刀片,在其他实施例中,切割刀片的数量可根据实际情况而定,例如,切割元件为2个或3个以上。
切割机构3相较于地面的高度可调节,以使自动割草机1割草时可完成不同高度的切割。具体的,调节切割机构3的高度的方式有多种,在一实施例中,自动割草机1还包括用于调节所述切割机构高度(调高)的调高结构6,当自动割草机1需要调节切割高度时,操作调高机构6,在所述调高结构6的带动下,切割机构3可上下移动,以实现切割机构3高度的调节,以实现切割草高的调节。在将切割高度由最低档调节至最高挡的过程中,切割机构3可相较于可活动防护件在上下方向上相对运动,例如,切割机构3相较于壳体10沿上下方向移动,切割机构3相较于地面在上下方向上运动,而可活动防护件41相较于地面在上下方向上不动,也即可活动防护壁的下端距离地面的初始距离保持不变。可活动防护件41的最低状态411保持不变,以使调高不影响自动割草机1的安全防护效果。本实施例中,在将切割高度由最低档调节至最高档的过程中,可活动防护壁的下端距离地面的初始距离始终 保持不变;在其他实施例中,也可部分档位调节的过程中,可活动防护壁下端距离地面的初始距离保持不变,而部分档位调节的过程中,可活动防护壁下端距离地面的初始距离发生变化。在另一实施例中,自动割草机1也可将刀盘31上下反装或者调换新的刀盘31等方式调节切割元件32距离地面的距离,以实现调节切割高度的目的,本实施例中,在调节切割高度的时候,不改变可活动防护件41,也即可活动防护件41与壳体10的位置关系不变,而直接调换刀盘31。当然,在一些实施例中,切割机构3相较于地面的高度也可始终固定,而无法调节。
在非调高状态时,切割机构3可设置为相较于壳体固定,也可设置为相较于壳体可运动。例如,切割机构3可相较于壳体在上下方向上运动,当外力作用于切割机构3下方时,例如,当切割机构3下方遇到障碍物对其施加的向上的外力时,切割机构3可相较于壳体向上运动,以避开障碍物,避免障碍物碰撞刀片,而且提升通过性。
如图2及图3所示,自动割草机1还包括用于安全防护的防护壁40的防护组件4,在水平方向上,防护壁设置于切割机构3的外侧,以防止人由外向内误碰切割机构3而对人造成意外伤害。防护组件4至少包括设有用于安全防护的可活动防护壁414的可活动防护件41,防护壁至少包括设置于可活动防护件41上,且在水平方向上位于切割机构3外侧的可活动防护壁414。在自动割草机1移动的过程中,可活动防护壁414受适当的外力作用时,可活动防护壁414的下端相较于地面在上下方向上的距离可变化,使得,当自动割草机1遇到障碍物62时,可活动防护壁414受到足够的外力作用,可活动防护件41的可活动防护壁下端417距离地面的距离能够变大,以快速通过障碍物,进而提升自动割草机1的通过性。上述可活动防护壁414的下端也可称为可活动防护壁下端417。
预设儿童手臂直径的最大值M,无论切割机构3处于何种切割高度,或者说,切割机构3处于任意切割高度下,当防护组件4处于不受外力的自由状态下,防护组件4的下端距离地面的距离为初始距离,该初始距离始终小于M,以防止儿童的手臂能够通过可活动防护件4的底部伸入自动割草机1内的切割机构3附近,而产生可能被切割机构3误伤的风险。一般情况下,儿童手臂直径最大值M范围为38mm-40mm(包含38mm和40mm),也即38mm≤M≤40mm。防护组件4的下端距离地面的距离则可对应设置为 15mm,19m,25mm,35mm,37mm,39mm等等。当然,在其他实施例中也可根据实际情况调整M的范围,例如为了防护更细的手臂,将M设得更小,又或者为了防护更粗的手臂,将M设得更大。以M=38mm为例,也即防护组件4的下端距离地面的距离始终小于38mm,上述防护组件4的自由状态是指,无论切割机构3处于何种切割高度,自动割草机1不受任何外力作用时,防护组件4的状态。当防护组件4处于自由状态下,当有直径大于M的手臂尝试从可活动防护件41下方伸入自动割草机1内时,被防护组件4下端阻挡,而无法将手臂伸入可活动防护件41内。在一实施例中,防护组件4下端距离地面的距离为15~35mm范围内,使得防护组件4下端距离地面的距离既可以避免儿童的手臂伸入,又不会因防护组件4距离地面太近而影响其在草地上的正常行走。
可活动防护件41的可活动防护壁下端417距离地面的距离可变化的方式有多种,例如,可活动防护件41可相较于底壳在上下方向上运动,以改变可活动防护壁的下端的离地距离;比如,可活动防护件41可整体相较于底壳在上下方向上运动,以使可活动防护壁整体相较于地面在上下方向上移动;或者,可活动防护件4仅局部相较于底壳在上下方向上运动,以使可活动防护壁局部距离地面距离可变等;又或者,可活动防护件4上端距离地面距离不变,而可活动防护壁下端417距离地面距离可变,例如,可活动防护壁下端417距离地面距离可通过转动或者形变等方式产生。
在一实施例中,如图1至图18所示,壳体10的底壳在上下方向上相较于地面不移动,而可活动防护件41可通过相较于壳体10的底壳在上下方向上移动,以实现其相较于地面在上下方向上移动。具体的,可如图1至图3所示,可活动防护件41设置于壳体10与切割机构3之间,独立于壳体10设置,也可如图16至图17所示,可活动防护件41设置于壳体10外,可活动防护件41可相较于壳体10的底壳在上下方向移动。可活动防护件41可如图16至图17所示,完全覆盖于壳体10外,以形成自动割草机1的上盖,也可如图18所示可活动防护件41设置于壳体10的局部上方,例如,设置于壳体10的前方、后方以及侧边等的边缘处。
在另一实施例中,也可可活动防护件41相较于壳体固定,壳体10相较于地面距离可变化,例如,移动模块与壳体10之间连接形式发生变化,而使得壳体10相较于地面距离变化等。在另一实施例中,也可如图19至图20 所示,可活动防护件41上端距离地面距离不变,而通过可活动防护件41在触碰障碍物时产生形变的方式,来实现可活动防护壁下端417距离地面的距离发生变化。在另一实施例中,也可如图21至23所示,可活动防护件41上端距离地面距离不变,且可活动防护件41上端相较于壳体10固定,而通过可活动防护件41绕其上端转动来实现可活动防护壁下端417相较于地面距离发生变化。在其他实施例中,可活动防护件41还可采用其他方式实现可活动防护壁下端417相较于地面距离可变,本申请中不再一一列举。
切割元件32包括在上下方向上位于其最低位置的切割元件最低点30。无论切割机构3处于何种切割高度,当自动割草机1在移动过程中,当遇到儿童的手臂,例如图8中直径为M的测试臂61时,因此时,测试臂61即相当于障碍物62,其对可活动防护壁414施加的力足以使可活动防护壁414向上移动。而当可活动防护壁414受外力,其下端向上移动时,若防护组件4的下端距地面能够大于等于M,例如,可活动防护壁下端417距地面的距离能够大于等于M,且防护组件4的下端移动至高于切割元件最低点30时,则,当自动割草机1移动过程中,遇到儿童的手臂时,会直接碾压,且手臂能够通过防护组件4直接进入切割机构3附近,被切割元件32割伤。本实施例中,如图8、图11及图23所示,可活动防护件41处于自由状态下,可活动防护壁下端417低于切割元件最低点,当可活动防护件41受到由外向内施加的力,向上运动到其可运动范围的最高点的过程中,防护组件4的阻挡壁40的下端始终低于切割元件最低点30,以使,自动割草机1在移动过程中,即使遇到儿童手臂(用测试臂61模拟),手臂即使能从防护组件4进入切割机构3附近,因防护组件4的防护壁40的下端始终低于切割元件最低点30,故测试臂61仅能位于切割元件30下方,而无法触碰到切割元件32,从而避免被割伤。当然,在其他实施例中,也可通过限制无论切割机构处于何种高度,或者说,切割机构3处于任意切割高度下,可活动防护件41受外力作用下,可活动防护壁下端417距地面距离无论如何变化,防护组件4的阻挡壁40的下端距地面的距离始终小于M,具体的,可通过限制可活动防护壁下端417距地面的距离始终小于M,来限制手臂无论如何都无法自防护组件4下方伸入切割机构3。
因防护组件4的阻挡壁40的下端始终低于切割元件最低点30,故测试臂61仅能位于切割元件30下方,如图8所示,为切割高度高于儿童手臂直 径示意图,此时,切割机构3距离地面的高度大于儿童手臂直径。为进一步保证安全,切割机构3还包括设置于其下端的刀盘防护件35,刀盘防护件35的下端为平滑表面,以保证儿童的手臂伸入切割机构3下部时,触碰的是光滑的表面。尤其是,当自动割草机倾斜时,切割元件32随之倾斜,儿童手臂受到刀盘防护件35的阻挡,可避免碰到切割元件32。
在一实施例中,如图9所示,切割元件32设置于刀盘31上方,切割机构3还包括用于将切割元件32固定于刀盘31上的紧固件33,紧固件33自上而下将切割元件32固定于刀盘31上方。切割机构3包括用于将刀盘31固定于旋转部36的固定件34及组装于刀盘31下方的刀盘防护件35,刀盘防护件35下端为光滑表面,刀盘防护件35与刀盘31之间具有收容固定件34的收容空间37,固定件34自下而上将刀盘31固定于旋转部36上,固定件34收容于收容空间37内,以防止固定件34暴露于切割机构3的下方,从而防止金属的固定件34随着旋转部36高速旋转时触碰儿童的手臂。如图9所示,刀盘31包括用于与切割元件32相互组装的刀片安装部315、位于刀片安装部中间且用于与旋转部36相互组装的旋转安装部316,及用于连接刀片安装部315与旋转安装部316的刀盘连接部317。其中,旋转安装部316的高度高于刀片安装部315的高度,旋转安装部316、刀盘连接部317及刀盘防护件35围成收容空间37。刀盘31与刀盘防护件35分别设有相互固定连接的固定连接结构312,固定连接结构312包括相互卡扣的第一卡扣结构313和第二卡扣结构314,第一卡扣结构313和第二卡扣结构314分别设置于刀盘连接部317和刀盘防护件35上。刀盘防护件35的下端与刀盘31的下端可在同一平面上,以使切割机构3的下端为完整的平面,从而使得切割机构3的底部更平滑,安全防护效果更好。当然,在其他实施例中,也可刀盘防护件35与刀盘31不在同一平面,而仅是刀盘防护件35或刀盘31的下端作为切割机构3的下端,只要刀盘防护件35与刀盘31的下端为平滑表面即可。
在另一实施例中,也可通过增设切割防护件305,在自动割草机的水平方向上的内外方向上,切割防护件305设置于可活动防护件内,切割防护件的下端低于切割元件最低点。如图57所示,切割防护件305可如图57所示为设置于可活动防护件内的机构防护件42。当然,切割防护件也可为其他形式,例如:
如图10所示,一实施例中,切割防护件305包括组装于切割机构3下方 的底部为光滑的刀盘防护件35,刀盘31与切割机构3之间具有收容紧固件33的收容腔39,切割元件32局部收容于收容腔39内。上述实施例中,以刀盘防护件35组装于切割机构3下方为例,在其他实施例中,也可刀盘防护件35与切割机构3局部一体成型,例如,直接从切割机构3局部延伸形成。
如图59所示,另一实施例中,切割防护件305包括设置于所述刀盘31并向下凸出所述刀盘31表面的刀盘防护件35。刀盘防护件35的下端低于切割元件32的最低点,切割元件32可围绕自身轴线转动形成自旋转区域,在刀盘的转动轴线偏离重力方向不超过预定角度时,刀盘防护件35的最低点和两个驱动轮中位置更高的驱动轮的最低点之间连线的延长线与切割元件相对于转动轴线转动到任意位置下的自旋转区域并不相交;该预定角度在30-60度范围内取值。在刀盘的转动轴线偏离重力方向不超过预定角度时,刀盘防护件35的最低点和两个驱动轮中位置更高的驱动轮的最低点之间连线的延长线与刀盘下表面并不相交;预定角度在30-60度范围内取值。
刀盘31具有朝向下方的下表面;切割元件32可转动地安装于下表面,并且能够伸出刀盘31的外边缘;刀盘防护件35设置于刀盘31的下表面或者从刀盘31的下表面向下凸起;刀盘防护件35的最大外径小于切割元件32的最大外径。刀盘防护件35围绕一中部空腔350设置,中部空腔350在刀盘防护件35的下端形成朝向下方的开口。刀盘防护件35可如图59所示,为设置于刀盘31下方的中空圆环结构,该中空圆环可直接从刀盘31下表面向下凸出形成,也可单独的零件组装于刀盘31下表面。切割后的草进入中部空腔350中,由于该中部空腔350具有朝向下方的开口,进而草不会淤积在凸出部中,保证刀盘的顺利转动。刀盘防护件35和刀盘31同轴设置;刀盘防护件35的下端面为圆环形状平面。进而,无论刀盘31朝向任意一侧侧倾,均可以通过刀盘防护件35将切割元件321与童臂相隔开,从而具有较佳的防割伤效果。在其他实施例中,刀盘防护件35也可为其他结构,例如,围设于中部空腔350周围的间隔设置的若干弧形、柱状、或其他形状等结构。刀盘防护件35向下超出切割元件的高度范围为2-30mm。
为了方便表述,上述实施例中的刀盘防护件35也可直接称为切割防护件305。
在上述实施例中,为了进一步防止自动割草机1倾斜时,童臂可能伸入切割机构3中,切割防护件305与切割机构在上下方向上相互固定,且在非 调高状态下,切割防护件在外力作用下,可与切割机构3一起相较于底壳在上下方向上运动,以使如图59所示,童臂伸入可活动防护件41内时,切割防护件305受到童臂施加的力,带动切割机构3一起向上运动,进一步避免童臂触碰切割元件。
在上述实施例中,为了进一步保证安全,当切割防护件305受力带动切割机构3向上运动时,切割防护件305与切割机构3可延时下降,例如,在顶点停留一定时间,再下降以回复原来位置,以避免下降太快,而导致自动割草机还未驶过童臂,切割机构便落下,而造成误伤童臂。具体的,自动割草机可通过设置用于控制切割机构3复位速度的延时机构来实现,改延时机构可为阻尼装置或者电磁铁等。
具体的,实现防护组件4的阻挡壁40的下端始终低于切割元件最低点30的方式有多种,例如,在一实施例中,可活动防护件41在受力向上移动的过程中,可活动防护件41向上移动受到限制,使可活动防护壁下端417始终位于切割元件最低点30。在另一实施例中,也可使可活动防护件41与切割机构3同步可活动,使得可活动防护壁下端417距离切割元件最低点30距离不变,从而实现可活动防护壁下端417始终位于切割元件最低点30。在另一实施例中,也可通过增设下端始终低于切割元件最低点30的机构防护件42,实现防护组件4的阻挡壁40的下端始终低于切割元件最低点30,等等。
以下,以增设下端始终低于切割元件最低点30的机构防护件42为例,具体说明。在本实施例中,防护组件4还包括设有机构防护壁424的机构防护件42,在水平方向上,自动割草机的机构防护壁424设置于切割机构3与可活动防护壁之间,防护壁40包括可活动防护壁和机构防护壁424。机构防护件42相较于切割机构3固定,其中,切割机构3可根据情况相较于壳体运动或不运动,当切割结构3相较于壳体运动时,机构防护件42跟随一起运动,当切割机构2相较于壳体不动时,机构防护件42也跟随一起不动。本实施例中,机构防护件42相较于切割机构3完全固定,无法在任何方向上相对运动,当然,在其他实施例中,机构防护件42也可仅在上下方向上相较于切割机构3固定即可,两者可在上下方向以外的方向上相对移动。机构防护件42包括用于防护的机构防护壁424,切割机构3包括在上下方向上位于其最低位置的切割元件最低点30。在上下方向上,机构防护件42相较于切割机构3固定,也即,在上下方向上,机构防护件42与切割机构3的相对位置不变。机构防 护件42的机构防护壁424的下端,也即机构防护壁下端427始终低于切割元件最低点30,从而保证防护壁40的下端始终低于切割元件最低点30,以防止儿童的手臂被自动割草机1碾压。
如图4及图6所示,在水平方上,机构防护件42位于切割机构3与可活动防护件41之间,可活动防护件41与机构防护件42在水平方向上的最小间距为2~30mm,以使得可活动防护件41在向上移动的过程中,不与机构防护件42相干涉。在一实施例中,可活动防护件41与机构防护件42之间的最小距离为2~8mm,在保证可活动防护件41移动的过程中,可活动防护件41与机构防护件42不相互干涉的同时,缩小可活动防护件41与机构防护件42之间的间距,使得自动割草机1整体结构更加紧凑。
机构防护件42包括机构防护壁424及用于连接机构防护壁424与壳体10的固定连接壁425,在上下方向上,机构防护壁424相较于刀盘31固定,也即,机构防护壁424与刀盘31在上下方向上的相对位置不变。机构防护壁424包括若干固定防护齿4246、若干位于两相邻的固定防护齿4246之间的固定进草口4247,及用于连接相邻的固定防护齿4246的连接部4248。固定进草口4247的宽度为1~M,固定防护齿4246的宽度为1~20mm,在能够进草的同时,避免儿童的手臂通过固定进草口4247穿过机构防护件41,而触碰到切割机构3。因固定进草口4247过宽,则会导致固定防护齿4246的有效长度降低,在一实施例中,固定进草口4247的宽度为10~25mm,在保证固定防护齿4246的有效长度的同时,避免儿童的手臂通过固定进草口4247穿过机构防护件42的同时,使得在自动割草机1移动的过程中,通过固定进草口4247进入切割机构3内的草的数量恰当,避免进入的草的数量过少,造成工作效率低或者堵草等现象。固定防护齿4146的宽度为4~10mm,在提升固定防护齿4246的刚性的同时,避免固定防护齿4246的宽度过大,造成堵草。在一实施例中,可活动防护件41也包括若干可活动防护齿4146、若干位于两相邻的可活动防护齿4146之间的固定进草口4147,及用于连接相邻的可活动防护齿4146的连接部4148,在自动割草机1前进的方向上,固定进草口4247与可活动进草口4147前后对应设置,以使草可以沿直线依次通过可活动进草口4147和固定进草口4247,从而避免卡草。固定防护齿4246与可活动防护齿4146分别沿圆周分布于切割机构3外侧,以在切割机构3外侧形成安全防护。
如图24及图25所示,在自动割草机1前进的方向上,机构防护壁424包括位于切割机构3前方的前机构防护壁4241、位于切割机构两侧的侧边机构防护壁4243及位于切割机构后方的后方机构防护壁4242。其中,前机构防护壁4241、后机构防护壁4242及侧边机构防护壁4243的下端427均低于切割元件最低点30。
本实施例中,为保证儿童手臂从任何方向伸入均无法触碰到切割元件30,可将机构防护件42的四周均设置机构防护壁,也即如图24及图25所示,在自动割草机1前进的方向上,前机构防护壁4241、后机构防护壁4242及侧边机构防护壁4243共同围成周向上封闭的机构防护壁,前机构防护壁4241、后机构防护壁4242及侧边机构防护壁4243的下端均低于切割元件最低点30,本实施例中,该机构防护壁在360度的周向上的最底部均低于切割元件最低点30。在另一实施例中,也可机构防护壁在360度周向上的最底部,至少部分高于切割元件最低点,至少部分低于切割元件最低点,且高于切割元件最低点的部分在周向上连续延伸的长度均小于M,以避免童臂伸入。在其他实施例中,机构防护壁424包括位于切割机构3前方的前机构防护壁4241、位于切割机构两侧的侧边机构防护壁4243以及位于切割机构后方的后方机构防护壁4242中的至少一个。
在一实施例中,如图1所示,机构防护壁424包括位于切割机构3前方的前机构防护壁4241及位于切割机构两侧的侧边机构防护壁4243中的至少一个,以阻止儿童手臂从前方或后方伸入切割机构3附近,而被割伤。而因自自动割草机1后方由外向内的力施加于可活动防护壁上时,外力施加的方向与自动割草机1前进时,障碍物62相较于自动割草机1运动的方向(由内向外)相反,可将由外向内的作用力与障碍物62区分开,例如,自动割草机1后方可通过限制可活动防护壁414受到由外向内向上移动时的阻力,阻自动割草机1后方的可活动防护壁下端417向上移动或阻止其向上移动超过切割元件最低点30来防止童臂受伤。而因自动割草机1前方由外向内的力施加的方向与障碍物62相较于自动割草机1运动的方向相同,其两侧由外向内外力施加的方向也与障碍物62相较于自动割草机1运动的方向不完全相反,无法将由外向内的作用力与障碍物62区分开,故,该实施例中,自动割草机1的前方及两侧可增加前机构防护壁4241和/或侧边机构防护壁4243。
如图1至图3所示,壳体10包括在水平方向上位于切割机构3外部的高 位壳体49,在(水平方向上的)由外向内的方向上,且在垂直于由外向内的方向上延伸M的范围内,高位壳体49距地面的距离始终高于M,因此时,童臂可通过高位壳体49下方到达切割元件32附近而被割伤,故,在水平方向上,或者说,在自动割草机的内外方向上,至少部分机构防护壁424位于于高位壳体49与切割机构3之间,以防止童臂自高位壳体49下方到达切割元件32附近而被割伤。
在其他实施例中,也可根据可活动防护件41的运动方式,选择不同的实施方式实现防护组件4下端始终低于切割元件最低点30。
以下,以可活动防护件41在外力作用下,可相较于壳体10的底壳在上下方向上运动,来改变可活动防护壁下端的离地距离为例,具体说明。
如图1至图3所示,可活动防护件41包括若干用于阻挡用户的手臂、手指或者其他外物的可活动防护壁414及用于连接可活动防护壁与壳体的可活动连接壁415中。可活动防护壁414包括设置于切割机构3前方的前可活动防护壁4141、设置于切割机构3两侧的侧边可活动防护壁4142及设置于切割机构3后方的后可活动防护壁4143中至少一个。本实施例中,以可活动防护壁414包括前可活动防护壁4141、侧边可活动防护壁4142及后可活动防护壁4143为例。其中,前可活动防护壁4141、侧边防护可活动防护壁4142及后可活动防护壁4143可全部或部分相互连接成一体,再通过可活动连接壁415与壳体10连接,前可活动防护壁4141、侧边可活动防护壁4142及后可活动防护壁4143也可彼此不相互连接,而分别通过可活动连接壁415与壳体10连接。前可活动防护壁4141、侧边可活动防护壁4142及后可活动防护壁4143可直接自可活动连接壁415延伸形成,也可单独成型,然后组装于可活动连接壁415上。可活动防护壁414包括若干可活动防护齿4146及若干位于两相邻的可活动防护齿4146之间的可活动进草口4147。如图1所示,在一实施例中,仅前可活动防护壁4141上设有若干可活动防护齿4146及可活动进草口4147,以使在自动割草机1前进的时候,草能不受到可活动防护齿4146的阻挡而通过可活动进草口4147进入切割机构3内。在其他实施例中,后可活动防护壁4143及侧边可活动防护壁4142也可对应设置若干可活动进草口4147,以防止压草。可活动进草口4147的宽度为1~M,可活动防护齿4146的宽度为1~20mm,在能够进草的同时,避免儿童的手臂通过可活动进草口4147穿过可活动防护件41,而触碰到切割机构3。因可活动进草口4147过 宽,则会导致可活动防护齿4146的有效长度降低,在一实施例中,可活动进草口4147的宽度为10~25mm,在保证可活动防护齿4146的有效长度的同时,避免儿童的手臂通过可活动进草口4147穿过可活动防护件41的同时,使得在自动割草机1移动的过程中,通过可活动进草口4147进入切割机构3内的草的数量恰当,避免进入的草的数量过少,造成工作效率低或者堵草等现象。可活动防护齿4146的宽度为4~10mm,在提升可活动防护齿4146的刚性的同时,避免可活动防护齿4146的宽度过大,造成堵草。
在上下方向上,可活动防护件41相较于壳体10的底壳101可移动,可活动防护壁414相较于壳体10的底壳也可移动,使得,当自动割草机1遇到一定范围内的障碍物62时,可活动防护件41的可活动防护壁414能够向上移动以避开障碍物62,进而保证自动割草机较好的通过性。本实施例中,可活动防护件41在障碍物等施加的外力作用下,可整体相较于底壳101向上运动,以使可活动防护壁的下表面上所有点的离地距离均增大,使得自动割草机整体可快速通过障碍物,大大提升自动割草机整体的通过性。可活动防护件41具有可移动范围内的最低状态411和最高状态412,最低状态411是指自动割草机移动过程中,可活动防护件41处于其在上下方向上可活动的空间内的最低位置,最高状态412是指自动割草机移动过程中,其在上下方向上可活动的空间内的最高位置。需要指出的是,最低位置与最高位置均是指自动割草机移动过程中,自然遇到的外力或者与该自然施加的外力同方向的外力所促使可活动防护件41可活动的范围,例如,可活动防护件41受到障碍物施加的外力,或者草对其的浮力等等;而不包含人为强行对可活动防护件41施加的向下的外力,所促使的可活动防护壁向下运动的情况。如图4所示,为可活动防护件41处于其可移动范围内的最低状态411示意图,如图5所示,为可活动防护件41处于到其可移动范围内的最高状态412示意图。当可活动防护件41处于其最低状态411时,可活动防护壁下端417距离地面的距离为H1,当可活动防护件41处于其最高状态412时,可活动防护壁下端417距离地面距离为H2。当自动割草机1在平坦的草地上移动,或者其经过障碍物62的高度小于等于H1的草地时,可活动防护件41处于最低状态411。当经过障碍物62高度大于H1且小于H2时,可活动防护件41受到障碍物62施加的力的作用,向上移动,以快速通过障碍物62。
本实施例中,可活动防护件41包括自由状态,该自由状态是指,在其对 应的切割高度下,自动割草机1不受外力作用时,可活动防护件41所处的状态。在不同的切割高度下,可活动防护件41的自由状态可相同,也即调节切割机构3的高度,不影响该可活动防护件41的自由状态;当然,在其他实施例中,可活动防护件41的自由状态也可受调高的影响。但是为了防止在自动割草机1静止的状态下,儿童的手臂从可活动防护件41下方伸入,必须保证,在任何切割高度下,可活动防护件41自由状态下,可活动防护壁下端417距地面的初始距离H0始终小于M。上述实施例中,设定M为38mm,也即可活动防护壁下端417距地面的初始距离始终小于38mm,当然,以上可活动防护壁下端417距地面的初始距离始终小于38mm为优选值,在其他实施例中,M也可在38mm到40mm之间(包含38mm和40mm),对应的,可活动防护壁下端417距地面距离只需始终小于M即可,例如,M为40mm时,可活动防护壁下端417距地面距离始终小于40mm,以下实施例中,均以可活动防护壁下端417距地面的初始距离始终小于38mm为例。
在一实施例中,可活动防护壁下端417距离地面的初始距离为15mm-35mm范围内,使得防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。可活动防护壁下端417离地距离也可进一步限缩在19mm-30mm范围内,一方面,限定离地距离大于19mm,增大可活动防护壁下端417的离地距离,提升通过性;另一方面,限定离地距离小于30mm,使离地距离与儿童手臂的直径的差值大于一定值,留有一定的安全余量,保证自动割草机倾斜等特殊工况下,儿童手指也无法伸入。当然,可活动防护壁下端417离地距离也可设置为其他范围,例如15mm-25mm范围内,等等。
在另一实施例中,可活动防护壁下端417距离地面的初始距离始终小于19mm,也即始终小于儿童手臂的半径,使得儿童手指不易从可活动防护壁下端417下方伸入切割机构3。
具体的,可预设一安全距离值,该安全距离值小于等于M,例如,该安全距离值为40mm,38mm,或19mm,15-35mm,或19-30mm或15~25mm等等。无论切割机构3处于何种切割高度,或者说,切割机构3处于任意切割高度下,可活动防护件41在自由状态下,可活动防护壁下端417距地面的初始距离H0始终小于该安全距离值。本实施例中,可通过在调节切割机构3的切割高度的时候,切割机构3可相较于可活动防护件41运动,来实现可活动防护 件41在自由状态下,可活动防护壁下端417距地面的初始距离H0始终小于该安全距离值。
如图4所示,当可活动防护件41处于其最低状态411时,可活动防护壁下端417距离地面的距离H1小于M,以防止儿童的手臂从可活动防护件41的底部伸入切割机构3内部,而导致被切割机构3误伤。如图4所示,可活动防护件41在自由状态下,也即自动割草机1不受外力作用的状态下,可活动防护件41处于其最低状态411;且无论切割机构3处于何种切割高度,可活动防护件41在自由状态下,可活动防护件41始终处于其最低状态411。也即,可活动防护件41在自由状态下,可活动防护壁下端417距地面的距离H0与可活动防护件41处于其最低状态411时,可活动防护壁下端417距离地面的距离H1相同。例如,当自动割草机1处于不移动的状态,或者在无阻力的草地上移动,或者其经过障碍物62的高度小于等于H1的草地时,可活动防护件41处于最低状态411。最低状态411下,可活动防护壁下端417距离地面的距离H1小于M,当有直径大于等于M的手臂尝试从可活动防护件41下方伸入自动割草机1内时,被可活动防护壁414阻挡,而无法将手臂伸入可活动防护件41内。在一实施例中,可活动防护壁下端417距离地面的距离H1为15~25mm范围内,使得可活动防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。在另一实施例中,可活动防护壁下端417距离地面的距离始终小于19mm,以防止儿童的手指从可活动防护壁下端417下方伸入切割机构3。
可活动防护件41在上下方向上,受外力向上运动的可运动距离不小于15mm,具体的可向上运动的距离范围可为15~80mm,使得可活动防护件41可避让大部分障碍物62。可活动防护壁的下端向上运动后,其相较于地面的距离可大于M,以避免为了阻挡童臂而限制了其通过性。在一实施例中,如图4至图6所示,自动割草机1包括连接壳体10与可活动防护件41的向上引导机构,例如,平行四连杆结构等,当可活动防护件41受到由外向内的力的作用时,向上引导机构引导,以允许可活动防护件41在上下方向上运动。该连接可活动防护件41的向上引导机构也可称为防护件向上引导机构45。切割机构3处于任意切割高度下,可活动防护件41在受外力作用下,其可相较于底壳101向上运动,以使可活动防护壁的离地距离增大;当外力消除时, 可活动防护件41可相较于底壳101向下运动,以使可活动防护壁的下端的离地距离回到初始距离。具体的,可通过重力实现可活动防护件41自动回到其自由状态下的位置,也可通过增设回复机构,例如,弹簧等使其回到其自由状态下的位置。因防护件向上引导机构45在转动的过程中,既可带动可活动防护件41在上下方向上移动,也会带动可活动防护件41在水平方向上移动,而水平方向上位移过大,则有可能与壳体10或水平方向上的其他部件相干涉,可能减小可活动防护件41在水平方向上的移动,本实施例中,可活动防护件41的上下可活动的距离限制为20~40mm,使得防护件向上引导机构45尽量选择在水平方向附近转动,以减小其水平方向上的移动范围。在其他实施例中,可活动防护件41也可通过其他结构与壳体10相连,以实现其上下方向上的移动,例如,通过四连杆、二连杆、单杆以及滑槽等结构。
在一实施例中,预设草安全抬起高度,当可活动防护壁414受外力向上移动的过程中,当可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。当自动割草机1静止的放在草地上时,草对自动割草机1的草抬升力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,小于可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。故,当自动割草机1静止的放在草地上时,草抬升力仅能将可活动防护壁下端417抬升至距地面不大于预设草安全抬起高度,而无法抬升至距地面大于草安全抬起高度,从而避免自动割草机1静止的放在草地上时,可活动防护壁414被草抬升至草安全抬起高度,而导致童臂从可活动防护壁414下方伸入切割机构3。本实施例中,预设草抬起高度小于38mm,以防止童臂伸入,在一实施例中,为预设草抬起高度为15~25mm范围内,使得防防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。当然,预设草抬起高度也可设定为小于19mm,以防止童指伸入。
在另一实施例中,自动割草机1移动的过程中,草对自动割草机1的草抬升力,大于自动割草机1静止的状态下,草对活动防护壁414的向上的草抬升力。可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可 活动防护壁414向上运动的阻力,不仅大于自动割草机1静止的状态下,草对活动防护壁414的向上的草抬升力,还大于自动割草机1移动的过程中,草对自动割草机1的草抬升力。也即,在自动割草机1移动的过程中,草对自动割草机1的草抬升力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,小于可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。故,当自动割草机1在草地上移动的过程中,草抬升力仅能将可活动防护壁下端417抬升至距地面不大于预设草安全抬起高度,而无法抬升至距地面大于草安全抬起高度,从而避免自动割草机1在草地移动时,可活动防护壁414被草抬升至草安全抬起高度,而导致童臂从可活动防护壁414下方伸入切割机构3。本实施例中,预设草抬起高度小于M,以防止直径为M的童臂伸入,在一实施例中,为预设草抬起高度为15~25mm范围内,使得防防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。当然,预设草抬起高度也可设定为小于19mm,以防止童指伸入。
在水平方向上,可活动防护壁414的最外缘与切割机构3距离其最近的部分的最小距离X大于58mm,一般情况下,可活动防护壁414的最外缘与切割机构3距离其最近的部分的最小距离X即为:在刀盘带动切割元件30旋转的过程中,可活动防护壁414的最外缘与切割元件30之间的最小距离。本实施例中,该最小距离X为58~200mm,因手指直径较小,依旧可平行从可活动防护件41底部伸入进而触碰切割机构3,本实施例中,通过将可活动防护壁414的最外缘与切割机构3距离其最近的部分之间的最小距离X为58~200mm,因大多数儿童的手指长度都在58mm范围内,本实施例,可有效阻止大多数儿童的手指从可活动防护件41的底部伸入切割机构3内部,而导致被切割机构3误伤。在一实施例中,可活动防护壁414最外缘与切割机构3距离其最近的部分之间的最小距离X为63~75mm,以在保证儿童手指无法触碰切割机构3的同时,限制可活动防护件41与切割机构3之间的水平距离,提升自动割草机1的整体结构的紧凑性,实现自动割草机1的小型化、轻量化。上述可活动防护壁最外缘413是指可活动防护壁414上用户的手臂或者手指所能触到的最靠外的部分,如图1所示,可活动防护壁最外缘413包括位于前可活动防护壁4141前边缘的前最外缘4131,位于侧边可活动防护壁4142 的外侧边缘的侧边最外缘4132及位于后可活动防护壁4143的后边缘的后端最外缘4133。可活动防护壁最外缘413可为平面、曲面或者不规则面等等。
如图1、图4、图6及图26所示,可活动防护壁414的最外缘,也即可活动防护壁最外缘413包括障碍物通过区4135,障碍物通过区4135包括由外向内倾斜向下延伸的倾斜面,障碍物通过区4135外高内低,当有障碍物62由外向内碰撞可活动防护壁最外缘413时,障碍物62产生一个垂直于可活动防护件41的最外缘4131的力,也即产生一个倾斜向上的力,该倾斜向上的力生成向上的分力,进而使得可活动防护件41向上运动,以快速通过障碍物62。
可活动防护壁414的前端最外缘4131包括上述障碍物通过区4135,障碍物通过区4135包括由外向内(由前向后)倾斜向下延伸的倾斜面,在自动割草机前进的方向上,倾斜的前端最外缘4131前高后低,当自动割草机1自动行走遇到障碍物62时,可活动防护件41碰撞障碍物62,障碍物62产生一个垂直于可活动防护件41的前端最外缘4131的力,也即产生一个倾斜向上的力,该倾斜向上的力生成向上的分力,进而使得可活动防护件41如图5所示,向上运动,以避开障碍物62,进而实现自动割草机1在避免儿童的手指或手臂触碰切割机构3的同时,提升其通过性。前端最外缘4131可为倾斜的平面或曲面等。
如图12所示,在一实施例中,可活动防护壁414的后端最外缘4133由外向内(由后向前),倾斜向下延伸。在自动割草机1前进的方向上,倾斜的后端最外缘4133前低后高,当自动割草机1后退时,如果碰撞障碍物62,障碍物62产生一个垂直于可活动防护件41的后端最外缘4133的力,也即产生一个倾斜向上的力,该倾斜向上的力生成向上的分力,进而使得可活动防护件41向上运动,以避开障碍物62,进而实现自动割草机1在避免儿童的手指或手臂触碰切割机构3的同时,提升其后退时的通过性。后端最外缘4133可为倾斜的平面或曲面等。同理,可活动防护壁414的侧边最外缘4132也可设置为倾斜向外且向上延伸,以使自动割草机1在向两侧转向时,快速通过障碍物,提升其转向时的通过性。
如图13所示,可活动防护壁414的后可活动防护壁4143组装于可活动连接壁415上。自动割草机1包括限位结构418及复位结构416,本实施例中,复位结构416为用于连接可活动连接壁415与后可活动防护壁4143的弹 性件,例如扭簧等,限位结构418为限位部4181,在其他实施例中,限位结构418及复位结构416可为其他形式。在自动割草机1正常移动的情况下,后可活动防护壁4143受到弹性件的弹力作用以及限位部4181的作用,使其维持在图13所示位置。如图13所示,当自动割草机1向后移动,后可活动防护壁4143的后最外缘4133碰撞障碍物62时,受到向上的力的作用,可活动防护壁4143向上移动至如图14所示位置,后可活动防护壁4143上方碰撞壳体10,后可活动防护壁4143受到向下的作用力,进而顺时针向下转动,如图15所示,将障碍物62推向前方,进而快速通过障碍物62,以继续向后移动。在后可活动防护壁4143在顺时针转动一定距离后,受到复位结构416的反向作用,例如,受到扭簧的回复力作用,后可活动防护壁4143逆时针返回如图13所示的位置。本实施例中,通过将后可活动防护壁4143设计为可翻转的形式,组装于可活动连接壁415上,通过后可活动防护壁4143向下翻转来避让障碍物62,而减小后可活动防护壁4143向上可活动的距离,在后可活动防护壁4143上方预留更多的空间给壳体10,使得自动割草机1整体结构更紧凑。
如图26所示展示了在一种实施例中,对其一连杆进行静力学分析得出:
F*L1*sin(a+b)=G*L1*cos(a)
得:F=G*cos(a)/sin(a+b)
其中:F为童臂水平推力,L1为连杆长度,L2为防护件允许上浮的距离,G为防护件的重力,b为自其最外端所在的竖直平面向内倾斜的角度。在该实施例中,可活动防护件41距离地面30mm,允许向上移动20mm,即可活动防护件下端417距离地面在30~50mm之间。该实例中,四连杆长度选取110mm。在可活动防护件41处于最高状态412时,四连杆运动保持水平状态。该实施例中,当F为童臂的测试力5N,G=0.93N。即可活动防护件重量大于93g,童臂测试力无法使防护件抬起。
通过以上计算可以发现,b越小,也即可活动防护件最外缘413与测试臂61接触的区域越接近竖直,四连杆越长,可活动防护件41越重,可活动防护壁下端417向上移动的距离越小,可活动防护件41越不易抬起。
本实施例中,如图26所示,可活动防护壁最外缘413还包括用于防止童臂抬起可活动防护壁414的安全锁定区4136。预设安全外力值F1,该安全外力值不小于童臂的测试力5N,当由外向内的作用力作用于安全锁定区时,可 活动防护壁414无法向上移动。安全锁定区4136设置于可活动防护件最外缘413与测试臂61接触的区域,以防止在童臂测试力的作用下,可活动防护件下端417向上运动。安全锁定区的下端离地距离小于M,即使可活动防护件受力向上运动,因安全锁定区下端离地小于M,在童臂可将可活动防护件顶起的最高位置处,必然有一段安全锁定区与童臂相抵持,以保证童臂无法伸入切割机构内。因可活动防护件最外缘413与测试臂61接触的区域一般在可活动防护壁414距地面距离为M范围内(包括M),所以至少在可活动防护壁414距地面距离为M范围内设置安全锁定区4136,当然,也可根据情况,在可活动防护壁414距地面距离超出M处,也设置上述安全锁定区41,以防止童臂倾斜接触上述可活动防护壁414。为了留有一定的安全余留,安全锁定区41在上下方向上延伸的长度不小于3mm,例如可为3-4mm。
如图26所示,安全锁定区4136位于其同一径向上的障碍物通过区向下的延长线的外侧。安全锁定区4136包括倾斜面和/或竖直面,具体的,安全锁定区4136包括由外向内倾斜向下延伸的倾斜面和/或竖直面和/或由外向内倾斜向上延伸的倾斜面,上述倾斜面及竖直面可为平面、曲面、不规则面等等。当安全锁定区4136为由外向内倾斜向下延伸的倾斜面时,安全锁定区4136的倾斜面自其最外端所在的竖直平面向内倾斜的角度可小于15度,一实施例中,安全锁定区4136的倾斜面自其最外端所在的竖直平面向内倾斜的角度可小于3度。当安全锁定区4136为由外向内倾斜向下延伸的倾斜面时,安全锁定区4136的倾斜面自其最外端所在的竖直平面向内倾斜的角度,小于障碍物通过区4135的倾斜面自其最外端所在的竖直平面向内倾斜的角度。安全锁定区4136的倾斜面自其最外端所在的竖直平面向内倾斜的角度越小,当预设安全外力值作用于安全锁定区4136时,可活动防护壁越不容易向上移动。一实施例中,可选择安全锁定区4136为竖直面,仅保留出模角度即可。而障碍物通过区4135的倾斜面自其最外端所在的竖直平面向内倾斜的角度越大,障碍物62碰到可活动防护壁414时,可活动防护壁414越容易被抬起,进而越容易避障。在一实施例中,如图43所示,在自动割草机1的上下方向上,可活动防护壁414包括位于其上端的主活动部401及自主活动部401向下延伸形成的锁定部402,主活动部401的最外缘设置有障碍物通过区4135,锁定部402的最外缘设置有安全锁定区4136。本实施例中,以可活动防护壁同时具有障碍物通过区4135和安全锁定区4136为例,在其他实施例中,可 活动防护壁也可仅具有障碍物通过区4135和安全锁定区4136中的一个。为了实现较佳的通过性,锁定部402下端离地距离优选为M/2至M范围内,其中M为38mm-40mm之间,例如,当锁定部402离地距离为19mm-40mm时,此时,锁定部402的下端离地距离大于测试臂61的半径,若如图43所示,锁定部402的最外缘为连续面或有一段为较长的连续面时,当测试臂61沿非法线方向撞击图43所示的可活动防护壁414的下端时,其受力如图44及图45所示,测试臂61的前端面与其侧面之间的过渡面抵持锁定部402的最外缘的连续面的下端,此时受力面为过渡面,且如图45所示,测试臂61上的受力点位于测试臂中心线所在的水平面的上方,测试壁61与可活动防护壁414抵持产生如图45所示的力F,该力F可分解为竖直方向上的分力F1和水平方向上的分力F2,其中,竖直方向上的分力F1会推动可浮动防护壁向上运动,而导致可活动防护壁离地距离增大,当距离大于测试臂61的直径时,测试臂61就可以伸入可活动防护壁414内部,进而伸入切割机构内被误伤。
为了避免测试臂61沿非法线方向撞击可活动防护壁414所带来的风险,一实施例中,如图46所示,可活动防护壁41的下端的锁定部402包括若干在周向上间隔设置于可活动防护壁414的底部的阻挡凸起4021及用于连接主活动部401与阻挡凸起4021的过渡壁4022,其中,阻挡凸起4021与过渡部4022的最外缘均设有安全锁定区4136,以防止童臂从锁定部402处伸入时,抬起可活动防护壁。在一些实施例中,如果阻挡凸起4021的最高点离地距离足够大,也可不设置过渡部,例如,因一般童臂直径不超过M,故,当阻挡凸起4021的最高点离地距离不小于M时,可不设置过渡部,即阻挡凸起4021直接从主活动部401底部向下延伸形成。如图46所示,连接于阻挡凸起4021上方的过渡部4022可称为上阻挡部,当阻挡凸起4021上方无过渡部4022,而直接是主活动部401连接于阻挡凸起4021上方时,该主活动部401也可称为上阻挡部。
如图46至48所示,在锁定部402下端离地距离为M/2至M范围内时,也即当阻挡凸起4021下端离地距离大于M/2时,例如当阻挡凸起4021离地距离为19-40mm时,或者说当锁定部402的下端离地距离大于测试臂61的半径时,当测试臂61沿非法线方向撞击图46所示的可活动防护壁414的下端时,测试臂61的前端面与阻挡凸起4021抵持,其受力如图47及图48所示,受力面始终为测试臂61的前端面,其仅产生图48所示的水平面上的力F’, 不会产生向上的力,可以避免可活动防护壁414受到测试臂61沿非法线方向施加的力时向上运动,而导致测试臂61伸入切割机构内部,进而造成危险。
为了使测试臂61沿任何法线方向撞击可活动防护壁414下端时,受力面均为测试臂61的前端面,进而避免产生向上的分力,任意两个相邻的阻挡凸起4021之间距离S及阻挡凸起4021的高度h必须大于零,但为避免测试臂61沿法线方向朝相邻两个阻挡凸起4021之间的间隙处伸入,因此,距离S≤测试臂直径,因测试臂直径小于等于40mm,故,本实施例中,S的范围限定为:0<S≤40mm;优选的,S范围为:3≤S≤25mm,以避免两相邻的阻挡凸起4021之间间隙过小,导致测试臂沿非法线方向侵入产生向上的力,或者间隙过大,测试臂61能伸入间隙内。同时,如果阻挡凸起4021过大,则会导致通过性不佳,因此,阻挡凸起4021的高度h限定为0<h≤80mm,优选,3≤h≤20mm。
同时,为避免测试臂61非法线方向撞击时,测试臂61的过渡面抵持阻挡凸起4021的最外缘,阻挡凸起4021的宽度M限定为0<M≤40mm,优选0<M≤20mm,阻挡凸起4021的最外缘与上阻挡部的最外缘不重叠,也即,阻挡凸起4021的最外缘与过渡部4022的最外缘不重叠,阻挡凸起4021不与上阻挡部最外缘重叠的部分,位于上阻挡部最外缘对应部分的内侧,也即,如图46所示,阻挡凸起4021的最外缘不与过渡部4022最外缘重叠的部分,位于过渡部4022的最外缘对应部分的内侧。例如当上阻挡部,也即过渡部4022与阻挡凸起4021的最外缘均为曲面时,阻挡凸起4021的曲率与其对应位置的上阻挡部的曲率大,也即与其对应位置的过渡部4022的曲率大。阻挡凸起4021的曲率半径R可设定为0<R≤20mm,优选0<R≤10mm。本实施例中,阻挡凸起4021的最外缘为半圆弧面,在其实施例中,阻挡凸起4021的最外缘也可为其他圆弧面,或者为宽度比较小的直面等等。
本实施例中,通过将锁定部402的下端,也即阻挡凸起4021的下端的离地距离设定为M/2至M范围内时,例如,锁定部402的下端离地距离为19mm-40mm,来增强自动割草机的通过性,并同时通过设置阻挡凸起4021来避免儿童手臂沿非法线方向进入可活动防护壁内,在提升通过性的同时,保证儿童安全。
在另一实施例中,也可通过将锁定部402下端离地距离限制在儿童手臂的半径范围内,来避免当儿童手臂沿非法向碰撞锁定部402时,产生向上的 分力。具体的,切割机构处于任意切割高度下,可活动防护壁41的离地的初始距离始终小于等于M/2,也即可将锁定部402下端离地的初始距离限制为小于等于M/2,例如,锁定部402下端离地距离小于等于19mm。此时,如图49所示,当测试臂61沿非法线方向撞击图43所示的可活动防护壁414下端时,如图50所示,测试臂61上的受力点始终在测试壁61的中心线所在的水平面上,此时仅产生水平面上的力F″,不会产生向上的分力,故,此时也可避免儿童手臂沿非法线方向伸入可活动防护壁414内。
具有如图46所示的锁定部402的自动割草机在遇到密草时,阻挡凸起4021会插入草内,因草是交叠在一起的,随着自动割草机的前进,阻挡凸起4021会把草拉断,而且交叠在一起的草会给自动割草机的前进带来阻力,降低自动割草机的通过性。
为了进一步提升密草的通过性,在一实施例中,如图51所示,可活动防护壁41的下端的锁定部402还包括在上下方向上延伸的用于连接至少两相邻的阻挡凸起4021的连接凸起4023,连接凸起4023局部向内凹陷以使连接凸起4023与其所连接的两相邻的阻挡凸起4021共同围成外侧间隔,且内侧封闭的结构。如图52至图54所示,当自动割草机前进时遇到草时,阻挡凸起4021插入草内,但随着自动割草机的前进,如图53所示,草被连接凸起4023压倒,随着自动割草机进一步前进,如图54所示,被压倒的草又立起来,进入到切割区域,进而被切割机构切割。本实施例中,通过设置连接凸起4023,有效避免阻挡凸起插入密草,而造成运行阻力增大,更甚至拉断、拉伤草。上述连接凸起与阻挡凸起共同形成的周向上连续的结构也可称为压草端面406。在其他实施例中,也可直接在可活动防护壁下端或者机构防护壁下端设置沿周向连续延伸的压草端面406,该压草端面406只要使得可活动防护壁的下端在内外方向上无贯穿的开口即可,其可如图51所示为锯齿状,也可为图56所示的结构,也可为图43所示的结构,压草端面406直接将草压倒,进而避免运行阻力大,更甚至拉断、拉伤草。
如图55所示,为了在保证安全防护的前提下,达到较佳的通过性,在由外向内的方向上,阻挡凸起4021最外侧与连接凸起4023最内侧之间的距离d、阻挡凸起4021的高度h、两相邻的阻挡凸起4021之间的距离S、阻挡凸起4021的宽度M,均不能过大或过小;d太大、或h太大、或S太大,塞入两阻挡凸起之间的间隙的量越多或草在间隙内的运动距离约达,运行阻力越 大,越容易拉伤草;d太小、或h太小、或S太小,或M太大,童臂都更容易伸入可活动防护壁414内,带来安全风险;M也不能太小,M太小,阻挡凸起4021的强度也会降低。鉴于上述原因,本实施例中,设定1mm≤d≤100mm,优选3mm≤d≤20mm;0mm<h≤80mm,优选3mm≤h≤20mm;0<S≤40mm,优选3≤S≤25mm;0<m≤40mm,优选0<m≤20mm,以在保证童臂无法伸入可活动防护壁的前提下,提升自动割草机的通过性。
如图51所示,本实施例中,连接凸起4023为连接相邻两阻挡凸起4021的V形结构,连接凸起4023与阻挡凸起4021连接成锯齿形,如此设计可以在保证相邻两阻挡凸起4021之间距离S,及阻挡凸起4021最外侧与连接凸起4023最内侧之间的距离d,阻挡凸起4021的高度h,及阻挡凸起4021的宽度M的同时,尽可能的减小连接凸起4023与阻挡凸起4021围成的、朝向自动割草机外侧的凹槽的体积,减小草塞入该凹槽的量,减小运行阻力,降低草被拉伤的风险。
当然,在其他实施例中,也可根据情况,连接凸起4023也可为接近V形的弧形结构,连接凸起4023与阻挡凸起4021连接成波浪形,又或者如图56所示,连接凸起4023也可为N形结构,连接凸起4023与阻挡凸起4021连接成连续的N形结构,等等。本实施例中,为了避免儿童的手臂被自动割草机1意外碾压时,被切割元件32割伤。需要保证在可活动防护件41可活动的过程中,也即,可活动防护壁下端417在上下方向上移动过程中,防护组件4的下端始终低于切割元件30。为实现上述目的,可通过增加上述机构防护件42的方式实现防护组件4的下端始终低于切割元件最低点30。也可通过限制可活动防护件41运动过程中,可活动防护件41与切割机构3的相对位置关系,来实现,可活动防护件41受外力,可活动防护壁下端417在上下方向上移动过程中,可活动防护壁下端417始终低于切割元件最低点30。
以在有可活动防护件41的情况下,可通过增加前述机构防护件42的方式实现防护组件4的下端始终低于切割元件最低点30为例。防护组件4包括可活动防护件41及机构防护件42,其中,机构防护件42相较于切割机构3固定,例如,当切割结构3相较于壳体运动时,机构防护件42跟随一起运动,当切割机构2相较于壳体不动时,机构防护件42也跟随一起不动。其中,在非调高状态下,切割机构3可设置为能够相较于壳体运动,也可设置为不能相较于壳体运动。不管切割机构2与可活动防护件41如何运动,或者如何相 对运动,因机构防护件42始终与切割机构2相对固定,且机构防护件42下端始终低于切割元件最低点30,故,测试臂61即使越过可活动防护件41,也会被机构防护件42挡住;即使机构防护件42下端高于测试臂61,测试臂61也仅能位于切割元件30下方,而无法触碰到切割元件30。因此,可保证儿童手臂安全。本实施例中,可直接引用前述或后述其他具有机构防护件42的任意实施例,在该实施例中,不再详述该结构。以下,在有可活动防护件41的情况下,以通过限制可活动防护件41运动过程中,可活动防护件41与切割机构3的相对位置关系来实现防护组件4的下端始终低于切割元件30为例。
例如,可通过限制可活动防护件41处于最低状态411和最高状态412这两个极限状态下,可活动防护件下端始终低于切割元件最低点30,来实现整个运动过程中,可活动防护件41的下端始终低于切割元件最低点30。
当自动割草机2的切割高度调至最低位置时,且可活动防护件41处于最低状态411时,在上下方向上,可活动防护件41的可活动防护壁下端417低于切割元件最低点30,以使自动割草机2无论切割高度如何调节,当可活动防护件41处于最低状态时,可活动防护件41的可活动防护壁下端417始终低于切割元件最低点30,以防止儿童的手臂被自动割草机1碾压。具体的,可活动防护壁下端417距离切割元件最低点30之间的距离为2~30mm,以保证儿童手指及手臂在防防护件四周都触碰不到切割机构3。
切割机构处于任意切割高度下,在自动割草机1移动的过程中,当可活动防护件41处于最高状态412时,也即可活动防护壁受外力向上运动到其可运动范围的最高点时,可活动防护壁下端417低于切割元件最低点30,以实现,可活动防护件41受到由外向内的力时,可活动防护件41的可活动防护壁下端417始终低于切割元件最低点30。为实现上述目的,可采用如下技术方案。
在一实施例中,在至少一档切割高度下,在自动割草机1移动的过程中,当可活动防护件41受外力作用在上下方向上运动时,切割机构3跟随可活动防护件41在上下方向上同步运动,以保证可活动防护壁下端417始终低于切割元件最低点30。可活动防护件41与切割机构3相互连接,在自动割草机1移动的过程中,当可活动防护件41受力向上移动时,切割机构3跟随一起向上移动,当可活动防护件41向下运动时,切割机构3也跟随一起向下运动。 本实施例中,通过切割机构3与可活动防护件41相互连接,实现可活动防护件41上下运动时,可带动切割机构3同步上下运动,在切割机构3跟随可活动防护件41上下运动的过程中,在上下方向上,切割机构3可相较于可活动防护件41固定,也可产生一定的相对运动。例如,在一实施例中,在自动割草机1运动的过程中,切割机构3与可活动防护件41在上下方向上相对固定,也即在上下方向上,两者的相对位置不变。因切割机构3跟随可活动防护件41一起可活动,两者上下方向上相对位置不变,只要可活动防护件41处于最低状态时,可活动防护壁下端417低于切割元件最低点30,则在可活动防护件41整个可活动的过程中,可活动防护壁下端417均低于切割元件最低点30。而在另一实施例中,在上下方向上,切割机构3在跟随可活动防护件41一起运动的同时,切割机构3还可相对于可活动防护件41运动,自动割草机1还包括用于调节切割机构3相较于可活动防护件41运动的可活动调节机构(未图示),例如,该可活动调节机构为自动调节切割机构3向上可活动的调节机构,比如,当可活动防护件41受到外力向上移动20mm,而可活动调节机构控制切割机构3相较于可活动防护件41向上可活动10mm,则整个过程中,可活动防护件41相较于壳体10向上移动20mm,而切割机构3相较于壳体10向上移动30mm。
而在调节切割机构3高度的过程中,切割机构3与可活动防护件41在上下方向上可相对运动,以使可活动防护壁下端417不会随切割机构3调高而无限的增高,进而保证可活动防护壁下端417距地面的距离H0始终小于预设安全距离值,例如,始终小于38mm。本实施例中,切割机构3与可活动防护件41在上下方向上可相对运动的方式为,在调节切割机构3高度的过程中,切割机构3相较于地面在上下方向上运动,可活动防护件41相较于地面在上下方向上不动。当然,在其他实施例中,也可通过切割机构3与可活动防护件41均在上下方向上移动,但两者调高时不同步移动,例如可活动防护件41移动的距离小于切割机构3移动的距离等。本实施例中,也可采用上述预设草安全抬起高度的实施方式,预设草安全抬起高度,当可活动防护壁414受外力向上移动的过程中,当可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。来实现,当自动割草机1静止的放在草地上时,草抬升力仅能 将可活动防护壁下端417抬升至距地面不大于预设草安全抬起高度,而无法抬升至距地面大于草安全抬起高度,从而避免自动割草机1静止的放在草地上时,可活动防护壁414被草抬升至草安全抬起高度,而导致童臂从可活动防护壁414下方伸入切割机构3。本实施例的细节,不再一一赘述。
在另一实施例中,在至少一档切割高度下,当可活动防护壁414受外力在上下方向上运动的过程中,可活动防护壁414的下端可相较于切割机构3在上下方向上运动。如图11所示,自动割草机1包括用于限制可活动防护件4与切割机构3相对位置的限位机构9,限位机构9用于限制可活动防护件4与切割机构3在上下方向上相对运动程度。限位机构9包括可相互抵持限位的切割限位部39与防护件限位部419,切割限位部39与切割机构3在上下方向上相对固定,防护件限位部419与可活动防护件41在上下方向上相对固定,切割限位部39与可活动防护件41相互抵持时,切割限位部39位于防护件限位部419的上方。具体的,限位机构9包括设置于可活动防护件4上的防护件限位部419及设置于切割机构3上的切割限位部39。切割限位部39位于防护件限位部419上方,当可活动防护壁414受外力向上移动的过程中,可活动防护壁414可相较于切割机构3在上下方向上运动,可活动防护壁414向上运动时,防护件限位部419跟随向上运动,当防护件限位部419运动到与切割限位部39相抵持时,被切割限位部39阻挡,可活动防护件4向上运动受到切割机构3的限制,可活动防护件4无法再相较于切割机构3继续向上运动,从而限制可活动防护件4相较于切割机构3向上运动的范围,使得可活动防护件4在向上运动的过程中,可活动防护壁下端417始终低于切割元件最低点30。可活动防护件4位于最低状态且切割机构3被调节至最低切割高度时,在上下方向上,可活动防护壁下端417距离切割元件最低点3的距离大于防护件限位部419与切割限位部39之间的距离,以使,当可活动防护件4运动到最高状态时,可活动防护壁下端417依旧低于切割元件最低点3,而且整个可活动的过程中,可活动防护壁下端417始终低于切割元件最低点3。当切割机构3向上调节时,随着切割机构3向上调节,防护件防护部419与机构防护部39之间的距离可活动防护件4处于最低状态时,可活动防护壁下端417与切割元件最低点30之间的距离同步增大,所以无论切割机构3调高多少,在上下方向上,可活动防护壁下端417始终低于切割元件最低点30。在其他实施例中,也可通过其他方式实现可活动防护件4可活动过程 中,可活动防护壁下端417始终低于切割元件最低点3,本发明中不再一一举例。本实施例中,也可采用上述预设草安全抬起高度的实施方式,来避免自动割草机1静止的放在草地上时,可活动防护壁414被草抬升至草安全抬起高度,而导致童臂从可活动防护壁414下方伸入切割机构3,本实施例的细节,不再一一赘述。
在本实施例的一种实施方式中,切割机构3相较于地面在上下方向上不动,当可活动防护件4向上运动受到切割机构3限制时,因切割机构3无法向上运动,故,可活动防护件4也无法再向上运动。
在本实施例的另一中实施方式中,如图27至29所示,切割机构3也可相较于地面在上下方向上移动,且切割机构3与可活动防护件41可相对独立的在上下方向上移动。自动割草机1包括用于连接可活动防护件41与壳体10的防护件向上引导机构45,及用于连接切割机构3与壳体10的切割向上引导机构35,防护件向上引导机构45独立于切割向上引导机构315,以使切割机构3与可活动防护件41可相对独立的在上下方向上移动。
如图27至28所示,在非调高状态下,当切割机构受外力作用时,切割机构可相较于地面在上下方向上移动,在至少一档切割高度下,当可活动防护壁414受外力在上下方向上运动的过程中,可活动防护壁414的下端可相较于切割机构3在上下方向上运动。本实施例以切割机构处于任意切割高度下,可活动防护壁414均可相较于切割机构在上下方向运动为例,其他实施例中,也可仅部分档位下,两者可相对运动。本实施例中,可活动防护壁414先单独向上运动至其与切割机构3相互限位,再如图28至29所示,可活动防护壁414与切割机构3一起向上运动。可活动防护壁414单独向上运动的阻力,小于可活动防护壁414和切割机构3相限位后一起向上运动的阻力。如图27至28所示,在自动割草机1向前移动的过程中,可活动防护壁414受到草对其向上的草抬升力的作用,该草抬升力大于可活动防护壁414单独向上运动的阻力,可活动防护壁414可向上移动。而该草抬升力小于可活动防护壁414与切割机构3相限位后一起向上运动的阻力,故,当可活动防护壁414向上运动至其与切割机构3相限位后,草对可活动防护壁414的草抬升力,无法将可活动防护壁414与切割机构3一起向上抬起,此时,可活动防护壁414维持在该状态执行切割任务,使得在切割时,可活动防护壁下端417与切割元件最低点30之间的距离维持在一定范围内,避免可活动防护壁 下端417距地面太近,又距切割元件最低点30太远的情况下,可活动防护壁417压住的草无法被切割。本实施例中,通过保证可活动防护壁下端417与切割元件最低点30之间的距离,一方面,提升了可活动防护壁下端417距地面的距离,降低压草的可能性,另一方面,即使可活动防护壁下端417压草,降低了其距切割元件最低点30之间的距离,被压住的草依旧可以被切割,从而大大提升切割质量。
如图28所示,当自动割草机1在移动过程中,遇到障碍物62时,障碍物62对可活动防护壁414施加的外力所产生的向上的障碍物抬升力,大于可活动防护壁414与切割机构3相限位后一起向上运动的阻力,故,当可活动防护壁414向上运动至其与切割机构3相限位后,在障碍物62的作用力下,如图29所示,可活动防护壁414与切割机构3一起向上运动,以通过障碍物62。
在上述实施例中,可活动防护壁414在受到由下自上的外力时,可活动防护壁414的下端相较于底壳向上运动。自动割草机在自动割草机在草地上移动时,可活动防护壁414受到草对其施加的由下自上的浮力,可活动防护壁414可向上运动,可活动防护壁414的下端产生向上的位移,以减小密草对其施加的运动阻力,提高密草通过性。上述实施例中,可活动防护壁414为整体相较于底壳在上下方向上运动的形式,在其他实施例中,可活动防护壁414也可如图19至图20所示,其为可压缩结构,使得其下端在受到由下向上的力时,下端可向上运动,以提升密草通过性。当然,在其他实施例中,可活动防护件也可为其他形式,不再一一举例。
本实施例中,也可结合上述预设草安全抬起高度的实施方式,预设草安全抬起高度,当可活动防护壁414受外力向上移动的过程中,当可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。而,当可活动防护壁下端417距地面距离大于预设草安全抬起高度、且可活动防护壁414还未与切割机构3相限位时,可活动防护壁414向上运动的阻力,既大于,可活动防护壁下端417距地面距离不大于预设草安全抬起高度、且可活动防护壁414还未与切割机构3相限位时,可活动防护壁414向上运动的阻力;又小于,可活动防护壁414和切割机构3相限位后一起向上运动的阻力。
当自动割草机1在移动过程中,草对可活动防护壁414的抬升力,大于当可活动防护壁下端417距地面距离大于预设草安全抬起高度、且可活动防护壁414还未与切割机构3相限位时,可活动防护壁414向上运动的阻力,小于可活动防护壁414与切割机构3相限位后一起向上运动的阻力。故,自动割草机1在移动过程中,草可将可活动防护壁414向上抬起至于切割机构3相限位,从而保证可活动防护壁下端417与切割元件最低点30之间的距离,以提升切割质量。
而当自动割草机1静止的放在草地上时,草对自动割草机1的草抬升力,大于当可活动防护壁下端417距地面距离不大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力,小于可活动防护壁下端417距地面距离大于预设草安全抬起高度时,可活动防护壁414向上运动的阻力。故,当自动割草机1静止的放在草地上时,草抬升力仅能将可活动防护壁下端417抬升至距地面不大于预设草安全抬起高度,而无法抬升至距地面大于草安全抬起高度,从而避免自动割草机1静止的放在草地上时,可活动防护壁414被草抬升至草安全抬起高度,而导致童臂从可活动防护壁414下方伸入切割机构3。本实施例中,预设草抬起高度小于M,以防止童臂伸入,在一实施例中,为预设草抬起高度为15~25mm范围内,使得可活动防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。当然,预设草抬起高度也可设定为小于19mm,以防止童指伸入。
在本实施例的另一种实施方式中,如图30至32所示,可活动防护件41包括上防护件43和下防护件44,其可通过下防护件44相较于上防护件43在上下方向上移动,来实现下防护件43的下端距离地面的距离发生变化,同时实现下防护件43的下端相较于切割机构3在上下方向上可移动。上防护件43与下防护件44分别包括上防护壁434及下防护壁444,上防护壁434与下防护壁444共同形成可活动防护壁414。下防护壁444的下端即为可活动防护壁下端417。该可活动防护件41的最低状态411即为下防护件44处于其在上下方向上可移动的空间内的最低位置,最高状态412即为下防护件44处于其在上下方向上可移动的空间内的最高位置。可活动防护件41上的防护件限位部419设置于下防护件44上,切割机构3上设有用于与防护件限位部419相互限位的切割限位部39。
在调节切割机构3的切割高度时,下防护壁444与切割机构3可在上下方向上相对运动,以实现下防护壁444的下端,也即可活动防护壁下端417距地面的距离始终小于M。例如,可通过,上防护壁434与切割机构3可在上下方向上相对运动,而下防护壁444与上防护壁434不在上下方向上相对运动,来实现下防护壁444与切割机构3可在上下方向上相对运动。而当可活动防护件41受外力向上运动的过程中,下防护壁444相较于地面向上运动时,其也相较于上防护壁434向上运动,先运动至其与切割机构3相限位,再同上防护壁434及切割机构3一起向上运动。
下防护壁444单独向上运动的阻力,小于下防护件44和切割机构3相限位后,下防护壁444、上防护壁434及切割机构3三者一起向上运动的阻力。如图31所示,在自动割草机1向前移动的过程中,下防护件44受到草对其向上的草抬升力的作用,该草抬升力大于下防护件44单独向上运动的阻力,下防护壁444可向上移动。而该草抬升力小于下防护壁444与切割机构3相限位后一起向上运动的阻力,故,当下防护壁444向上运动至其与切割机构3相限位后,草对下防护件44的草抬升力,无法将下防护壁444与切割机构3一起向上抬起,此时,如图31所示,上防护件44与下防护件44维持在该状态执行切割任务,使得在切割时,可活动防护壁下端417与切割元件最低点30之间的距离维持在一定范围内,也即下防护壁444的下端与切割元件最低点30之间的距离维持在一定范围内,避免下防护壁444的下端距地面太近,又距切割元件最低点30太远的情况下,下防护壁444的下端压住的草无法被切割。本实施例中,通过保证下防护壁444的下端与切割元件最低点30之间的距离,一方面,提升了下防护壁444的下端距地面的距离,降低压草的可能性,另一方面,即使下防护壁444的下端压草,因降低了其距切割元件最低点30之间的距离,被压住的草依旧可以被切割,从而大大提升切割质量。
如图31及图32所示,当自动割草机1在移动过程中,遇到障碍物62时,障碍物62对下防护壁444施加的外力所产生的向上的障碍物抬升力,大于下防护壁444、上防护壁434及切割机构3相限位后一起向上运动的阻力,故,当下防护壁444向上运动至其与上防护壁434及切割机构3相限位后,在障碍物62的作用力下,如图32所示,下防护壁444与与上防护壁434及切割机构3一起向上运动,以通过障碍物62。
本实施例中,也可结合上述切割机构3与可活动防护件41可相对独立的 在上下方向上移动,且切割机构3与可活动防护件41上设有相互限位的限位机构9的实施例中,预设草安全抬起高度的实施方式,通过预设草安全抬起高度,当下防护壁444受外力向上移动的过程中,当下防护壁444的下端距地面距离大于预设草安全抬起高度时,下防护壁444向上运动的阻力,大于当下防护壁444距地面距离不大于预设草安全抬起高度时,下防护壁444向上运动的阻力。而,当下防护壁444的下端距地面距离大于预设草安全抬起高度、且下防护壁444还未与切割机构3相限位时,下防护壁444向上运动的阻力,既大于,下防护壁444距地面距离不大于预设草安全抬起高度、且下防护壁444还未与切割机构3相限位时,下防护壁444向上运动的阻力;又小于,下防护壁444、上防护壁434和切割机构3相限位后一起向上运动的阻力。
当自动割草机1在移动过程中,草对下防护壁444的抬升力,大于当下防护壁444距地面距离大于预设草安全抬起高度、且下防护壁444还未与切割机构3相限位时,下防护壁444向上运动的阻力,小于下防护壁444与切割机构3相限位后一起向上运动的阻力。故,自动割草机1在移动过程中,草可将下防护壁444向上抬起至如图32所示,与切割机构3相限位的状态,从而保证下防护壁444下端与切割元件最低点30之间的距离,以提升切割质量。
而当自动割草机1静止的放在草地上时,草对自动割草机1的草抬升力,大于当下防护壁444下端距地面距离不大于预设草安全抬起高度时,下防护壁444向上运动的阻力,小于下防护壁444的下端距地面距离大于预设草安全抬起高度时,下防护壁444向上运动的阻力。故,当自动割草机1静止的放在草地上时,草抬升力仅能将下防护壁444下端抬升至距地面不大于预设草安全抬起高度,而无法抬升至距地面大于草安全抬起高度,从而避免自动割草机1静止的放在草地上时,下防护壁444的下端被草抬升至草安全抬起高度,而导致童臂从下防护壁444下方伸入切割机构3。本实施例中,预设草抬起高度小于M,以防止童臂伸入,在一实施例中,为预设草抬起高度为15~25mm范围内,使得可活动防护件41下方距离地面的距离既可以避免儿童的手臂伸入,又不会因可活动防护壁414距离地面太近而影响其在草地上的正常行走。当然,预设草抬起高度也可设定为小于19mm,以防止童指伸入。
在另一实施例中,可活动防护件4与切割机构3也可自动可活动。自动 割草机1还包括用于检测可活动防护件4及切割机构3是否需要可活动的检测模块以及根据检测模块的检测结果控制自动割草机1自动控制可活动防护件4以及切割机构3可活动的可活动控制模块。检测模块可以是视觉传感器、超声波传感器、红外传感器等等,通过视觉、超声波、红外等方式检测前方是否有障碍物以及障碍物的大小,当前方有可越过的障碍物时,可活动控制模块控制可活动防护件4及切割机构3自动移动以避开障碍物,并根据障碍物大小调节可活动防护件4以及切割机构3的运动距离,在调节可活动防护件4及切割机构3的运动距离时,可控制可活动防护件4可与切割机构3同步以移动相同的距离,也可控制可活动防护件4与切割机构3不同步以移动不同的距离;而当前方无障碍物时,则可活动控制模块控制可活动防护件4及切割机构3回到原始状态;当前方有障碍物,但是障碍物过大,则可活动控制模块控制可活动防护件4及切割机构3不移动,并根据实际情况控制自动割草机1停机或转向以避免碰撞障碍物。如图57所示,因自动割草机1有些轮子,例如驱动轮较大,若测试臂61平放在地面,当自动割草机1的驱动轮201爬上测试臂61时,会造成自动割草机1倾斜,此时,若自动割草机1的切割机构3离地高度较低,则测试臂61有可能碰到切割元件32,会有伤害儿童手臂的风险。
在一实施例中,如图58所示,自动割草机还包括设置于壳体底侧的可弯折的柔性的阻挡件,在自移动设备前进方向上,阻挡件19位于移动模块的前侧和/或后侧,阻挡件包括固定于壳体底侧的壳体端,和受外力作用下可相较于壳体端运动的自由端,壳体端与移动模块间隔设置,自由端在外力作用下可与移动模块抵持,以阻止移动模块向前移动碾压童臂。如图58所示,阻挡件19设置于驱动轮前方,以防止驱动轮201向前爬上儿童手臂。如图58所示,当驱动轮201遇到测试臂61时,柔性阻挡件19位于测试臂61与驱动轮201之间,阻挡驱动轮201爬上测试臂61。
在其他实施例中,也可通过其他方式阻挡驱动轮201爬上儿童手臂,例如,在自动割草机1前方设置两个从动轮,且从动轮的直径小于等于儿童手臂的直径的两倍,从动轮的直径可设置为小于等于2M,例如,从动轮的直径可设置为80mm,使得儿童手臂不低于从动轮的中线,从而避免从动轮越过手臂,因从动轮位于自动割草机前方,从动轮无法越过手臂,则驱动轮更无法接触手臂。
在另一实施例中,也可通过在切割机构3下方设置如图4至图10所示的刀盘防护件,以使得即使驱动轮201爬上儿童手臂,儿童手臂也仅能碰到刀盘防护件,而无法碰到切割元件。
在上述实施例中,为了避免雨水在防护组件4上聚集,可在可活动防护件41和机构防护件42上分别设置若干上下贯穿的漏水孔403,使雨水及时排到地面,避免水在上面聚集,用户将机器翻转过来的时候,水流到电子元器件内。
在上述实施例中,切割机构3可设置于自动割草机1的前进方向上的中轴线附近,也可设置于中轴线的一侧,以实现切割到边,对应实施例中的可活动防护件41和/或机构防护件42也设置于自动割草机1前进方向上的中轴线的一侧,以在实现切割到边的同时,防止儿童的手指或手臂等伸入切割机构3而造成误伤。如图33所示,以可活动防护件41与切割机构3设置于中轴线的一侧为例,因该实施例中,可活动防护壁下端417可相较于地面移动,如图34所示,当用户抬起自动割草机1时,其手握自动割草机1两侧时,手指对可活动防护件41施加向上的推力,使得可活动防护壁414向上移动,用户的手无法靠对可活动防护件41施加力来将自动割草机1抬起,而只能通过对壳体10的外侧防护壁14施加力来抬起自动割草机1。此时,虽然手无法直接握持可活动防护壁417,但是,握持外侧防护壁14时,手指依旧可伸入可活动防护件41的下方,故,可活动防护件41还包括设置于切割元件1下方的下方可活动防护壁4149,以防止用户的手指从可活动防护件41的下方伸入切割元件32附近。
因可活动防护壁417设置于外侧防护壁14与切割机构3之间,外侧防护壁14比可活动防护壁417距离切割元件32更远,当用户的手指从外侧防护壁14伸入切割机构3时,手指能够触碰到可活动防护件41的下方距离小于手指的长度,故,下方可活动防护壁4149在手指伸入的方向上的宽度小于手指的长度。而,随着外侧防护壁14与可活动防护壁417的间距的增大,下方可活动防护壁4149在在手指伸入的方向上的宽度,也即在自动割草机1垂直于其前进方向的水平方向上,可设置的更短,甚至无需设置下方可活动防护壁4149,从而在保证用户抬起自动割草机1安全的前提下,大大提升自动割草机1的通过性。
如图33及34所示,可活动防护壁包括沿上下方向延伸的竖防护壁及位于竖 防护壁下方且沿水平方向延伸的横防护壁,横防护壁的至少一侧突出于竖防护壁的对应一侧,使得可活动防护壁受到草的浮力时,其受力面较大,可受到较大的草的抬升力,增强通过性。可如图33所示,横防护壁的内侧凸出于竖防护壁的内侧,也可横防护壁的外侧凸出竖防护壁的外侧,也可横防护壁的内外侧均凸出竖防护壁的内外侧。具体的,横防护壁沿内外方向上的宽度为5-50mm。
在本发明的一种实施例中,可活动防护件41的可活动防护壁414的上部,距离地面距离不变,且可活动防护壁固定端4111相较于壳体10固定,而可活动防护壁414的下部,距离地面距离发生变化,从而实现可活动防护壁下端417距地面的距离可变,以提升自动割草机1的通过性。而且,可活动防护件41在自由状态受到由外向内(由前向后)的外力时,可活动防护壁下端417距离地面的距离始终小于M,使得儿童的手臂在可活动防护壁414的阻挡下无法伸入壳体10内触碰切割机构3。
如图21至图23所示,可通过可活动防护壁414绕其上端做转动运动实现其下端相较于地面距离发生变化;也可如图35所示,可活动防护件41为可伸缩式,可活动防护壁414的上端相较于壳体10固定,而可活动防护壁414的下端可通过伸缩实现其下端相较于地面的距离发生变化,具体的伸缩方式,可通过弹性变形或滑槽等实现。
如图21至图23所示,可活动防护件41包括设置于壳体10的挡板46,挡板46设置于切割机构前方、侧边、和后方中的至少一处。当挡板设置于切割机构前方时,可称为前挡板;当挡板设置于切割机构后方时,可称为后挡板;当挡板设置于切割机构侧边时,可称为侧边挡板。挡板46在自由状态下,其下端距离地面的距离小于M,挡板46包括固定端4111和活动端4112,固定端4111连接于壳体10上,具体的,固定端固定连接于壳体10上,在外力作用下,活动端4112的下端可相较于底壳101运动,以使活动端4112的下端距地面的距离可变化。本实施例中,其活动端4112可绕固定端4111转动,以使活动端距地面的距离小于M。挡板46包括用于防护的可活动防护壁414,挡板46的活动端4112也可称为可活动浮动壁下端417。
如图21所示,在自由状态下,活动端4112处于初始位置A,如图22所示,当挡板46向前移动遇到障碍物时,其受到与自动割草机1移动方向相反方向的外力作用,活动端4112转动至越障极限位置B。转动过程中,可挡板46的活动端4112可至少在初始位置A和越障极限位置B之间变换。在上 下方向上,越障极限位置B距离地面的距离大于初始位置A距离地面的距离,以使自动割草机1在向前移动时,可活动防护件41的挡板46遇到障碍物时,其能够转动至越障极限位置B,以增大可活动防护壁下端417(活动端4112)距离地面的距离,进而快速通过障碍物。
预设挡板46由外向内转动的转动限位位置C,在转动限位位置下,活动端4112距地面的距离小于M。预设安全外力值,例如,5N的外力,当由外向内的作用力作用于挡板46的可活动防护壁414,且由外向内的作用力不超过预设安全外力值时,活动端4112无法向内转动或向内转动不超过转动限位位置C,以防止儿童的手指自外向内伸入挡板46内。如图23所示,在一实施例中,转动限位位置C即为初始位置A,也即挡板46受到由外向内外力,且外力值不超过预设安全外力值时,挡板46无法向内转动。在其他实施例中,转动限位位置C也可为初始位置A向内转动一定角度的位置,只要满足转动限位位置C距地面距离小于M,也即挡板46受到由外向内外力,且外力值不超过预设安全外力值时,挡板46向内转动无法达到其活动端4112距地面距离大于或等于M的位置,以避免童指伸入。预设挡板46由外向内转动的防护极限位置K,当不管多大的由外向内的外力作用于挡板46时,挡板46由外向内转动始终不能超过防护极限位置K。本实施例中,防护极限位置K即为转动限位位置C。在其他实施例中,防护极限位置K也可于转动限位位置C不同。例如,预设安全外力值和外力阈值,挡板46在转动限位位置处,由后向前转动的阻力大于预设安全外力值,小于外力阈值。当小于预设安全外力值的外力作用到挡板46上时,挡板46可转动至转动限位位置C,而当大于外力阈值的力作用到挡板46时,挡板46可越过转动限位位置C,到达防护极限位置K。在防护极限位置K下,挡板46的活动端4112低于切割元件最低点30,和/或距地面的距离小于M,以避免自动割草机1将童臂当障碍物碾压时,儿童手臂被切割元件误伤。
自动割草机1还包括用于限制挡板由外向内运动不超过转动限位位置的转动限位结构4113,挡板在自由状态下所处的位置不同于转动限位位置,挡板在转动限位位置处,由外向内转动的阻力大于挡板在自由状态下,其由外向内转动的阻力,挡板处于转动限位位置时,挡板的下端距地面的距离小于M。
预设安全外力值和外力阈值,挡板在所述转动限位位置处,由外向内转 动的阻力大于所述预设安全外力值,小于所述外力阈值,以使大于所述外力阈值的作用于所述挡板时,所述挡板可越过所述转动限位位置。
当由外向内的作用力大于所述外力阈值时,挡板由外向内转动可越过转动限位位置,但不超过防护极限位置,当挡板位于防护极限位置时,挡板的下端始终低于所述切割元件最低点或前挡板的下端距地面的距离小于M,其中,38mm≤M≤40mm。
自动割草机还包括设置于切割机构与挡板之间的机构防护件,机构防护件包括在水平方向上设置于挡板与切割机构之间的机构防护壁,在上下方向上,机构防护壁的下端始终低于所述切割元件的最低点。
如图21至图23所示,在自动割草机1前进的方向上,可活动防护件41的挡板46设置于切割机构3的后方,当然,我们也可直接称该挡板为后挡板。自动割草机1包括设置于切割机构后方的后挡板,后挡板包括固定端4111和活动端4112,固定端连接于壳体上,活动端4112可绕固定端转动,以使活动端距地面的距离发生变化,自动割草机还包括用于限制后挡板由后向前转动不超过转动限位位置的转动限位结构4113。
当后挡板处于自由状态下时,后挡板的下端距地面的距离小于M,其中,38mm≤M≤40mm。后挡板在自由状态下受外力作用时,其由前向后转动的阻力小于其由后向前转动的阻力。后挡板在转动限位位置处,由后向前转动的阻力大于等于后挡板在自由状态下,其由后向前转动的阻力。后挡板在自由状态下所处的位置与转动限位位置相同。后挡板在自由状态下受外力作用时,只能由前向后转动,而无法由后向前转动。后挡板在自由状态下所处的位置不同于转动限位位置,后挡板在转动限位位置处,由后向前转动的阻力大于后挡板在自由状态下,其由后向前转动的阻力,当后挡板处于转动限位位置时,后挡板的下端距地面的距离小于M,其中,38mm≤M≤40mm。预设安全外力值和外力阈值,后挡板在转动限位位置处,由后向前转动的阻力大于预设安全外力值,小于外力阈值。当由后向前的作用力大于外力阈值时,后挡板由后向前转动可越过转动限位位置,但不超过防护极限位置,当后挡板位于防护极限位置时,后挡板的下端始终低于切割元件最低点或后挡板的下端距地面的距离小于M,其中,38mm≤M≤40mm。
自动割草机1还包括设置于切割机构3与后挡板之间的机构防护件42,机构防护件包括在水平方向上设置于后挡板与切割机构之间的机构防护壁, 在上下方向上,机构防护壁的下端始终低于切割元件的最低点。
一实施例中,转动限位结构4113至少部分设置于壳体和/或后挡板上。例如,转动限位结构4113至少部分设置于壳体和后挡板中的一个上,当后挡板处于所述转动限位位置时,转动限位结构4113与壳体和后挡板中的另一个的至少局部相抵持,且在两者相互抵持时,后挡板的下端距离地面的距离小于M,其中,38mm≤M≤40mm。
自动割草机1还包括设置于切割机构3侧边的侧挡板,侧挡板包括连接于所述壳体的侧固定端和可绕所述侧固定端转动的侧活动端,自动割草机还包括用于限制侧挡板的侧活动端由外向内转动的转动程度的侧转动限位结构。
自动割草机1还包括设置于切割机构3前方的前挡板,前挡板包括连接于所述壳体的前固定端和可绕前固定端转动的前活动端,自动割草机还包括用于限制侧挡板的前活动端由外向内转动的转动程度的前转动限位结构。在水平方向上,后挡板在自由状态下,其活动端的最外缘距所述切割元件的距离范围为大于58mm,或63~75mm。
如图23所示,当儿童的手臂自后向前伸入壳体10内时,被挡板46挡住,挡板46受到由外向内的力。挡板46在自由状态下,其由内向外转动的阻力小于其由外向内转动的阻力,本实施例中,在自由状态下,可活动防护壁下端417(活动端4112)处于的初始位置A即为其由外向内转动的转动限位位置C,同时也是防护极限位置K,挡板46只能由内向外转动,无法由外向内转动,且该初始位置A距地面的距离小于M,故,当儿童的手臂自后方向可活动防护壁414施加外力时,可活动防护壁414无法顺时针转动,从而保证可活动防护件41在自由状态受到由外向内的外力作用时,可活动防护壁下端417距离地面的距离始终小于M,使得儿童的手臂在挡板46的可活动防护壁414的阻挡下无法伸入壳体10内,使得儿童的手臂无法触碰切割机构3。在另一实施例中,在防护极限位置K下,可活动防护壁下端417(活动端4112)为低于切割元件最低点30的位置,当儿童的手臂自后向前伸入壳体10内时,被挡板46挡住,挡板46受到由外向内的力,其转动至转动限位位置C时,挡板46的活动端4112低于切割元件最低点30,以避免自动割草机1将童臂当障碍物碾压时,儿童手臂被切割元件误伤。自动割草机1还包括用于限制挡板46的可活动防护壁414由外向内转动始终不超过转动 限位位置C的转动限位结构4113,以限制挡板46的可活动防护壁414的转动尺度。当转动限位位置C与防护极限位置K为不同位置时,自动割草机1则包括用于限制挡板46的可活动防护壁414由外向内转动始终不超过转动限位位置C的转动限位结构4113,及用于限制挡板46的可活动防护壁414由外向内转动始终不超过防护极限位置K的防护限位机构。
本实施例中,挡板46在自由状态下,可活动防护壁414处于竖直或者近似竖直的状态,以使得可活动防护壁下端417(活动端4112)处于可活动防护壁414转动过程中的最低点,进而保证可活动防护壁414受到前方障碍物的作用力时,其转动后的位置距离地面的距离始终大于初始位置A距离地面的距离,以保证遇到障碍物后快速通过。
在上述实施例中,挡板46受到自动割草机1移动方向后方的作用力时,其受由外向内的外力作用转动到达的转动限位位置C和防护极限位置K与自由状态下的初始位置A相同。在另一实施例中,可活动防护件41受到自动割草机1移动方向后方的作用力(由外向内的力)时,其转动限位位置C和防护极限位置K也可与初始位置A也可不同,只要挡板在转动限位位置C时,其下端距地面距离小于M,且挡板在防护极限位置K时,其下端距地面的距离小于M,或防护极限位置K始终低于切割元件最低点30即可。
本实施例中,可活动防护件41的挡板46在受外力转动的过程中,可活动防护壁下端417可在初始位置A、越障极限位置B以及防护极限位置K之间变换。在上述实施例中,在自动割草机1移动方向上,通过将转动型的可活动防护件41设置于切割机构3后方,使得障碍物相较于自动割草机1移动的方向(由前向后)于由外向内作用于可活动防护件的外力方向(由后向前)相反,并控制可活动防护件41在障碍物相较于自动割草机1移动的方向上可转动以通过障碍物,而限制挡板46在由外向内(由后向前)方向上的转动,从而避免儿童的手臂通过挡板46而触碰切割机构3。不仅如此,自动割草机1的移动模块20包括设置于自动割草机1后方的驱动轮及设置于其前方的从动轮。本实施例中,通过将可活动防护件41的挡板46设置于自动割草机1后方,也即挡板46位于切割机构3的后方,位于后方驱动轮的附近,有效避免驱动轮被障碍物垫起,而导致的驱动轮架空,无法接触地面,无法提供驱动力的情况,大大提升自动割草机1的通过性。
在另一实施例中,如图36至图38所示,在自动割草机1前进的方向上, 上述挡板46也可设置于切割机构3的前方。挡板46在自由状态受到由外向内(由前向后)的外力时,挡板46移动不超过预设移动范围,在预设移动范围内,可活动防护壁下端417距离地面的距离始终小于M,使得儿童的手臂在可活动防护壁414的阻挡下无法伸入壳体10内,和/或可活动防护壁下端417始终低于切割元件最低点30,使得儿童的手臂无法触碰切割机构3。
如图36所示,可活动防护件41的挡板46处于自由状态下,可活动防护壁下端417(活动端4112)处于初始位置A;当自动割草机1前进时,碰到障碍物,受到障碍物作用力移动至极限位置时,可活动防护壁下端417(活动端4112)处于障碍物极限位置B;当其受到由外向内的外力作用移动至极限位置时,可活动防护壁下端417处于防护极限位置K。因障碍物作用于可活动防护壁414上的力的方向与可活动防护壁414受到由外向内的外力的方向相同,故,障碍物极限位置B与防护极限位置K为同一位置。
自动割草机1还包括用于限制挡板46在自由状态下受到由外向内的外力时其活动范围的限制模块(未图示)。通过限制模块限制可活动防护件41的活动范围不超过预设活动范围,使得防护极限位置K距离地面的距离始终小于M,使得儿童的手臂在可活动防护壁414的阻挡下无法伸入壳体10内,和/或,在上下方向上,防护极限位置K始终低于切割元件最低点30,使得儿童的手臂无法触碰切割机构3。上述限制模块可为机械结构,直接限制可活动防护件41的转动角度,以限制其移动范围;也可通过电子检测可活动防护件41的转动角度,当可活动防护件41在自由状态下受到由外向内的外力时,其活动范围超过预设活动范围时,控制模块50控制自动割草机1执行相应的预定防护指令。具体的,可通过预设一防护指令,该防护指令包括切割机构3停止工作、自动割草机1后退、停止移动或停机等。
在一实施例中,如图37所示,在上下方向上,可活动防护壁下端417(活动端4112)位于切割机构3下方,在水平方向上,活动端4112相较于切割元件32更靠近自动割草机1的内部,使得当有生命体,例如儿童的手指或小动物等从活动端4112伸入切割机构3内时,被可活动防护壁414阻挡,无法自下而上触碰切割元件32,进而避免被切割元件32误伤。
在另一实施例中,如图36及图38所示,壳体10上还安装有用以检测可活动防护件41的位置变化的检测开关60。检测开关60能够检测可活动防护件41的位置变化,并将检测数据发送给控制模块50,控制模块50用以根据 检测开关60的检测信息控制自动割草机1执行相应的防护指令。
当自动割草机自动行走时,可活动防护件41较切割机构3更靠近壳体10的外壁,本实施例中,以可活动防护件41为挡板46为例,当然,其他实施例中,可活动防护件41也可为其他类型。本实施例中,可活动防护件41,也即挡板46,会先接触到要切割的草、植物或障碍物,然后可活动防护件41在接触力的作用下相对壳体10沿远离草地的方向移动,使可活动防护件41的底部的离地间隙将逐渐增大。因此,可活动防护件41可以对切割机构3的切割元件32起到防护作用。
可活动防护件41与壳体10可相对移动地连接,可以利用不同的方式实现。例如图36所示,可活动防护件41与壳体10通过转轴实现转动连接,可相对于壳体10朝向切割刀片转动。如图35所示,可活动防护件41与壳体10也可以是滑动连接,以能够沿壳体10的高度方向上下移动,以远离或靠近草地。
本实施例中,利用检测开关60检测可活动防护件41的位置信息,并将检测信息发送给控制模块50。控制模块与检测开关电连接,以接收检测信息,并根据检测开关发送的检测信息控制移动模块和/或切割机构工作。
其中,检测开关60设置为未检测到可活动防护件41到达一预定极限位置时,控制模块50控制移动模块20正常行走及切割机构3转动,当检测开关60检测到可活动防护件41到达该预定极限位置时,检测开关60被触发,控制模块50控制自动割草机1执行相应的预定防护指令,例如移动模块20和/或切割机构3停止工作,或降低移动模块20和/或切割机构3的运行速度等,从而对自动割草机1实施切割保护。
具体的,本发明的发明人研究发现,草或植物是自动割草机1的清理对象,可活动防护件41需要能够越过草或植物。草或植物相对容易倒伏,因此需要可活动防护件41转动的角度或上移的距离有限。因此,可活动防护件41到达一预定极限位置(定义为草木通过的极限位置)时,能够越过可活动防护件41的物体均可以认为是草或植物。如果可活动防护件41的转动的角度或移动的距离过大,则说明可活动防护件41可能是触碰到了障碍物,可能损伤切割刀片32。因此,通过检测可活动防护件41的位置,可以获知可活动防护件41的触碰对象。
在一些实施例中,上述预定极限位置可以为一个位置,检测开关60通过 一次检测即控制自动割草机1执行预定防护指令;上述预定极限位置也可为至少两个,检测开关60根据预定极限位置的不同程度,控制自动割草机1执行不同程度的防护指令。预定极限位置包括第一预定位置D和第二预定位置E。
如图36所示,可活动防护件41设置为相对于壳体10可在初始位置A和第一预定位置D之间转换。在初始位置A和第一预定位置D,可活动防护件41分别具有初始离地高度a和第一离地高度d,初始离地高度a和第一离地高度d均小于切割元件32的离地高度,第一离地高度d大于初始离地高度a。
本实施例的自动割草机,割草作业中,可活动防护件41首先触碰到物体,当可活动防护件41触碰到的是草或植物时,可活动防护件41不会移动至第一预定位置D,因此检测开关60不会被触发。当可活动防护件41在接触力的作用下到达第一预定位置D时,说明可活动防护件41碰到的大概率是障碍物,但此时检测开关60已被触发,控制模块50降低移动模块20和/或切割机构3的运行速度。这样即使障碍物碰切割元件32,对切割元件32的损害也极小,甚至没有损害,从而实现切割保护。并且,由于可活动防护件41相对壳体10可以改变位置,因此实现切割保护的同时,不需要降低壳体10的离地高度,保证了自动割草机具有良好通过性。
例如,以图36中可活动防护件41相对于壳体10转动为例,初始位置A时,可活动防护件41可以是垂直于草地,可活动防护件41转动至第一预定位置D时转动角度为30度。即定义可活动防护件41转动角度30度时为一个临界点。转动角度达30度时,即实施切割保护。在其他的实施方式中,初始位置A时可以与上下方向存在一定夹角,偏向壳体10的外壁。可活动防护件41转动至第一预定位置D时转动角度也不一定是30度,取决于作业场地的草和植物的茂密程度和硬度。
本实施例中,切割保护包括降低移动模块20和/或切割机构3的运行速度,二者可以择一或同时实施。如当可活动防护件41移动至第一预定位置D时,检测开关60被触发,控制模块50可以降低移动模块20的行走速度,同时降低切割机构3的转速。
检测开关60可以是接触式开关,如压力传感器、霍尔开关等,可以适应壳体10下方的恶劣作业环境。具体的,检测开关60可以是设置在壳体10 下方,当可活动防护件41转动至第一预定位置D时触碰到检测开关60,从而触发检测开关60,检测开关60生成触发信号。检测开关60还可以是非接触式传感器,如超声波传感器。
本实施例中,增设检测开关60来检测可活动防护件41的位置变化。控制模块50接收到检测开关60的检测数据后,可以通过控制电路来改变移动模块20、切割机构3的输入电流的大小来实现减速,可以通过改变输入电流的方向实现移动模块20的反向行走。
一些实施例中,可活动防护件41处于第一预定位置D,检测开关60被触发时,控制模块50控制移动模块20减速至预定速度,减速为零并反向行走,或减速为零;和/或控制切割机构3减速至大于零的预定速度,或减速为零。具体的,移动模块20可以是减速后继续前进,也可以是减速为零并反向行走即后退,还可以是减速为零即制动。切割机构3可以是减速后继续转动,或干脆制动停转。也就是说,移动模块20和切割机构3都先进行减速,但减速的程度可以灵活设置,其中后退可以视为一个特殊的减速。
一些实施例中,如图36所示,可活动防护件41相对于壳体10还具有第二预定位置E,在第二预定位置E时,可活动防护件41具有第二离地高度e,所述第二离地高度大于第一离地高度。也就是说,第二预定位置E时,可活动防护件41的离地高度更大,更远离草地。
实际作业中,可活动防护件41若到达第一预定位置D,则预警可活动防护件41触碰到的可能是障碍物,但也有是相对坚硬的草木。此种情况下,可活动防护件41会越过第一预定位置D然后此时至少不希望自动割草机100停机。
为此,本实施例中,还设置了第二预定位置E。可活动防护件41处于第一预定位置D时,检测开关60被触发并生成第一触发信号,控制模块50控制移动模块减速至大于零的预定速度继续前进。当可活动防护件41处于第二预定位置E时,检测开关60被触发并生成第二触发信号,控制模块50控制移动模块20减速为零后反向行走,或制动移动模块20。即检测开关60被第一次触发时,移动模块减速前进,当可活动防护件41到达第二预定位置E时,由于检测开关60被第二次触发,则判定可活动防护件41触碰到的是障碍物,必须给予更严格的切割保护,因此移动模块20直接停止不动,或干脆后退。
一种可行的实施方式中,检测开关60为设置在壳体10上的接触式开关,可活动防护件41到达第一预定位置D时能触发所述检测开关;可活动防护件41到达第二预定位置E时能又一次触发检测开关60。即可活动防护件41仅在到达第一预定位置D或第二预定位置E时才触发检测开关60。
另一种可行的实施方式中,检测开关60为设置在壳体10上的滑动电阻开关,可活动防护件41与滑动电阻开关的可移动部分连接。这种方式下,检测开关60一直被触发,但在可活动防护件41到达第一预定位置D和第二预定位置E时触发信号不同,如给予控制模块50的反馈电流信号的值大小不同,使得控制模块50可以生成不同的控制指令。
一些实施例中,如图38所示,壳体10具有前端110和后端120,后端120至前端110的方向定义为自动割草机100的前进方向,前端110至后端120的方向定义为自动割草机100的后退方向。与前进方向或后退相垂直的方向定义为左右方向。可活动防护件41至少有部分位于前端110与切割机构3之间,或至少有部分位于后端120与切割机构3之间。换言之,可活动防护件41至少有部分结构是设置在切割机构3的前侧或后侧,自动割草机100前进或后退时防护切割机构3。可活动防护件41也可以是至少有部分结构设置在切割机构3的后侧,在自动割草机100后退时防护切割机构3。还可以是切割机构3的前侧和后侧均有可活动防护件41。
如图38所示的一种可活动防护件41的布置方式中,可活动防护件41整体位于前端10与切割机构3之间。如图39所示,可活动防护件41可以呈板状。如图40所示,可活动防护件41可以梳齿状。具体的,可活动防护件41的靠近草地的底部设有多个进草孔510。可活动进草口4147的间隙设置为60~40mm,只允许草和植物通过,但可阻挡障碍物通过。
在可活动防护件41的另一种布置方式中,可活动防护件41位于切割刀片的左侧或右侧,或切割机构3的左侧和右侧均有可活动防护件41;且可活动防护件41至少有部分延伸至前端110与切割机构3之间,或至少有部分延伸至后端120与切割机构3之间。
一具体的实施结构中,如图41所示,切割机构3的两侧均有可活动防护件41。可活动防护件41大致呈弧形,使得两端部410中的第一个延伸至前端110与切割机构3之间,两端部410中的第二个则延伸至后端120与切割机构3之间。这样自动割草机100前进或后退时,可活动防护件41的端部 410能够先于切割机构3接触到障碍物,从而能够发挥保护作用。
进一步地,切割机构3的四周均有可活动防护件41。具体的,如图41所示,一种方式为:环绕切割机构3的周向上间隔设置有多处的可活动防护件41。又如图41所示,另一种方式为:可活动防护件41环绕切割机构3一周,此时,可活动防护件41可以是整体式,也可以是多个可活动防护件41拼接在一起。
一些实施例中,如图35所示,可活动防护件41与壳体10也可以是滑动连接,以能够沿壳体10的高度方向上下移动,以远离或靠近草地。结合图2和图6所示,可活动防护件41的底部在远离切割机构3的一侧具有倒角430。这样,草、植物会先触碰到倒角430,更容易倒伏然后越过可活动防护件41,这样可活动防护件41需要的移动距离小,需要占用的壳体10的下方空间小,利于结构紧凑。进一步地,可活动防护件41在倒角430处的表面为外凸的弧面,使得草、植物更容易越过可活动防护件41。
一些实施例中,如图36和图37所示,自动割草机100还包括用以侦测生命体的热红外传感器70,热红外传感器70设置在可活动防护件41的远离切割机构3的一侧;控制模块50用以接收热红外传感器70的侦测数据,以对自动割草机实施切割保护。热红外传感器70侦测到生命体后,对自动割草机实施切割保护,从而避免伤害事件发生。
此处的切割保护可以有多种实现方式。例如,切割保护为制动切割机构3,和/或使移动模块20带动壳体10反向行走;和/或使移动模块20带动壳体10转向。热红外传感器70侦测到生命体后,可以采取制动切割机构3、使自动割草机100后退或者转向等方式中的一种或多种来实施切割保护。
在一些实施例中,还可将上述可活动防护件41仅一端活动的实施例,也可与机构防护件42的实施例结合,自动割草机1还包括在水平方向上设置于挡板46与切割机构3之间的机构防护件42,机构防护件42包括在水平方向上设置于挡板46与切割机构3之间的机构防护壁424,在上下方向上,所述机构防护壁下端417始终低于所述切割元件的最低点。机构防护件42的具体结构可参上述具有机构防护件42的实施例,在此不再赘述。
在一些实施例中,如图24及图25所示,在自动割草机1前进的方向上,可活动防护件41至少包括两个相对独立运动的子可活动防护件。可活动防护件41包括至少设置于自动割草机1的前方且设有前可活动防护壁474的前可 活动防护件47,及至少设置于自动割草机1的后方且设有后可活动防护壁484的后可活动防护件48。上述前可活动防护件47及后可活动防护件48可称为子可活动防护件。前可活动防护件47与后可活动防护件48独立设置,前可活动防护件47与后可活动防护件48不相连,以使前可活动防护件47与后可活动防护件48受外力作用时,前可活动防护壁下端477(前可活动防护壁474的下端)与后可活动浮动壁下端487(后可活动防护壁484的下端)分别相较于地面独立移动。因自动割草机1内部结构复杂,如果在自动割草机1上成型整体的可活动防护件48,有些部位因空间不够,很难设计,本实施例中,通过将可活动防护件41设计成独立的至少两个子可活动防护件,可以根据自动割草机1上的空间去布局子可活动防护件41的具体位置及个数,使得自动割草机1整体结构可以布置的更紧凑。
本实施例中,当前可活动防护件47受到竖直向上的作用力时,前可活动防护件47能够在上下方向上移动。而当后可活动防护件48受到竖直向上的作用力时,后可活动防护件48无法在上下方向上移动。其中,前可活动防护件47可为前述受外力作用整体往上运动的可活动防护件,也可为通过伸缩等实现其活动端由下往上运动的可活动防护件。前可活动防护件47还包括设置于自动割草机1两侧的侧边可活动防护壁475,侧边可活动防护壁475与前可活动防护壁475相互连接,使得当前可活动防护件47受到外力作用时,侧边可活动防护壁475与前可活动防护壁475同步在上下方向上移动。自动割草机1还包括用于引导前可活动防护件47相较于壳体在上下方向上移动的防护件向上导引机构45,当前可活动防护件47受外力向上移动时,前可活动防护壁474与侧边可活动防护壁475整体向上移动。后可活动防护件48包括一端固定于所述壳体上的挡板46,挡板46包括固定于所述壳体的固定端4111及受外力可绕所述固定端4111转动的活动端4112。
当自动割草机1在草地上移动时,在草由下而上的抬升力作用下,其前可活动防护件47受力由下向上移动,以避免压草或减小压草高度,减小切割元件与前可活动防护件下端474之间的距离,提升切割质量。而因自动割草机1的切割机构3在其后可活动防护件48前方,故,后可活动防护件48移动到草上方时,草已经被切割完成,不会造成压草。
壳体10还包括位于可活动防护件41外侧的外侧防护壁14,外侧防护壁14的下端距离地面的距离小于75mm,以防止成人手臂伸入切割机构3内部。 在一实施例中,外部防护壁14的下端距离地面的距离为35~55mm,在防止成人手臂伸入切割机构3的同时,还限制儿童手臂自外部防护壁14下方倾斜向上伸入壳体10内时的倾斜角度,以降低儿童手臂倾斜向上触碰切割机构3的风险。
在一实施例中,如图60所示,自动割草机1至少包括两个防护件,分别为设有内防护壁911的内防护件91和设有外防护壁921的外防护件92,在水平方向上,外防护壁921位于切割机构3外侧,内防护壁911位于外防护壁921与切割机构3之间;在任意切割高度下,所述外防护件92在不受外力的自由状态下,外防护壁921的下端离地距离小于M,其中,38mm≤M≤40mm,以防止童指伸入切割机构3内部。内防护壁911在外力作用下,其下端始终低于所述切割元件最低点,以防止动态的童臂伸入时,触碰到切割元件32。
内防护件91与外防护件92可分别可活动的防护件或不可活动的固定件。
一实施例中,可如图60至图61所示,内防护件91与外防护件92均为不可活动的固定件。外防护件91包括相较于底壳101在上下方向上固定的固定防护件,例如,该固定防护件的外防护壁911可为壳体的一部分。固定防护件离地距离小于M,且大于M/2。
内防护件91为相较于切割机构在上下方向上固定的机构防护件。如图60至61所示,内防护壁911包括位于所述切割机构3前方的前内防护壁912、位于所述切割机构两侧的两侧边内防护壁913、及位于所述切割机构的后方的后内防护壁914中的至少一个。
内防护壁911包括位于切割机构前方的前内防护壁912、位于切割机构两侧的两侧边内防护壁913及及位于切割机构3后方的后内防护壁914,前内防护壁、后内防护壁及侧边内防护壁共同围成周向上封闭的内防护壁911,内防护壁913在360度的周向上的最底部均低于所述切割元件最低点。内防护壁911的下端为连续延伸的平滑面。
当然,在另一实施例中,内防护壁在360度周向上的最底部,也可至少部分高于切割元件最低点,且部分低于切割元件最低点,高于切割元件最低点的部分在周向上连续延伸的长度均小于M,使得童臂即使伸入切割机构内,也无法触碰切割元件。
切割机构3可相较于底壳101在上下方向上固定或可相对运动。以切割机构3与底壳101在上下方向上相对固定为例。切割机构3与底壳101在上 下方向上相对固定,自动割草机1还包括用于安装切割元件32的刀盘31,切割元件32设置于刀盘31的上方。自动割草机1还包括设置于切割机构3下方的底部防护件95,底部防护件95的底部为光滑平面,底部防护件95与切割机构3之间设有收容切割元件32和紧固件33的腔体951。切割元件32局部收容于腔体951内。上述实施例中,以底部防护件95组装于切割机构3下方为例,在其他实施例中,也可底部防护件95与切割机构3局部一体成型,例如,直接从切割机构3局部延伸形成。具体的,本实施例中的底部防护件95可为如图10所示的刀盘防护件35的结构,当然,也可为其他结构。
如图60所示,在上下方向上,底部防护件95距离切割元件32的距离范围为0-30mm;在左右方向上,底部防护件95距离内防护件91的距离范围为10-30mm,以防止图60所示的极限情况下,童臂从自动割草机的前方或两侧进入切割机构内部,而触碰到切割元件。
具体的,内防护件91可为图1至图10所示的实施例,或者上文其他实施例中的,在上下方向上相较于切割机构3固定的机构防护件42。当切割机构3受外力相较于底壳101可在上下方向上运动时,在外力作用下,切割机构3与内防护件91可一起相较于底壳在上下方向上运动。
在其他实施例中,内防护件91也可为图1至图10所示的实施例,或者上文其他实施例中的,设有可活动防护壁414的可活动防护件41。该设置于外防护件内部的可活动防护件41也可称为内可活动防护件。内可活动防护件在外力作用下,可相较于切割机构3在上下方向上运动;且在任意切割高度下,内可活动防护件在外力作用下,内可活动防护壁的下端始终低于切割元件最低点。
在至少一档切割高度下,当内可活动防护件受外力在上下方向上运动的过程中,内可活动防护壁的下端可相较于切割机构在上下方向上运动,自动割草机1还包括用于限制切割机构与内可活动防护件相对位置的限位机构,内可活动防护件在限位机构的限制下,内可活动防护壁的下端始终低于所述切割元件的最低点。关于可活动防护件41的具体结构可参上文其他实施例,不再赘述。
当然,外防护件92也可为图1至图10所示的实施例,或者上文其他实施例中的可活动防护件41。该设置于内防护件外的可活动防护件41也可称为外可活动防护件,外可活动防护件上的可活动防护壁也可称为外可活动防 护壁。外防护件包括设有外可活动防护壁的外可活动防护件。外可活动防护件在外力作用下,外可活动防护壁的下端可相较于所述底壳产生上下方向上的位移,且在任意切割高度下,外可活动防护件在自由状态下,外可活动防护壁的下端离地距离小于M。
如图61所示,外防护件92也可为两件式,具体的,外防护件92包括相较于底壳101在上下方向上固定的固定防护件923及设有外可活动防护壁的外可活动防护件924,外可活动防护件924在外力作用下,外可活动防护壁9241的下端可相较于底壳产生上下方向上的位移,且在任意切割高度下,外可活动防护件在自由状态下,外可活动防护壁9241的下端离地距离小于M。
固定防护件923包括设置于壳体上的外侧防护壁14,外侧防护壁14至少设置于切割机构的前方,外可活动防护件924包括至少设置于切割机构后方的后挡板。在自由状态下,外防护件离地距离可为19-38mm。内防护件与外防护件在水平方向上的最小距离范围可为2~30mm,或2~8mm,以防止内防护件与外防护件在运动时相互干涉。自动工作系统还包括引导线,自动割草机1还包括引导线侦测模块(未图示),引导线侦测模块包括至少一个引导线检测传感器,用于检测自动割草机与引导线之间的位置关系。自动割草机与引导线之间的位置关系包括,自动割草机位于引导线的两侧中的一侧,或者自动割草机与引导线之间的距离等。本实施例中,引导线包括边界线,限定自动割草机的工作区域。在其他实施例中,引导线也可以是布置在工作区域中的导线,由停靠站所在位置引出,用于引导自动割草机向停靠站移动。当然,引导线也可以是篱笆等形成的物理边界,或者草坪与非草坪之间形成的物理边界等。相应的,引导线检测传感器可以是摄像头、电容传感器等等。在其他实施例中,也可以没有引导线,相应的,直接通过电容传感器、或GPS定位等方式控制自动割草机的工作区域。
预设一阈值,当能源模块中的电能低于阈值时,控制模块50控制自动割草机1沿边界线向停靠站移动,以实现自动割草机1回归充电站给能源模块补充电能,控制模块50控制自动割草机1沿边界线向停靠站移动的过程中,控制自动割草机1通过改变自身与边界线之间的距离,然后控制自动割草机1以与边界线平行的移动方向移动至少第一预设距离,并重复上述步骤,以实现控制模块50控制自动割草机1回归充电站。在其他实施例中,自动割草机1也可以通过其他方式回归充电站。在其他实施例中,自动割草机1也可 以通过预设时间或者其他参数,当到达规定时间或其他参数时,控制模块50控制自动割草机1自动返回充电站补充电能。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (45)

  1. 一种自动割草机,其包括:
    壳体,设有底壳;
    移动模块,设置于所述壳体下方,用于带动所述自动割草机移动;
    切割机构,设置于所述壳体以执行预定切割高度的切割任务,所述切割机构包括用于切割的切割元件;
    控制模块,用于自主控制所述移动模块带动所述自动割草机移动,并自主控制所述切割机构执行切割任务;其特征在于:
    所述自动割草机还包括设有防护壁的防护组件,在水平方向上,所述防护壁设置于所述切割机构的外侧,所述防护组件至少包括可活动防护件,所述防护壁至少包括设置于所述可活动防护件,且在水平方向上位于所述切割机构的外侧的可活动防护壁,所述切割机构处于任意切割高度下,当所述可活动防护件处于不受外力的自由状态时,所述可活动防护壁的下端的离地距离为初始距离,所述初始距离始终小于M,且38mm≤M≤40mm,所述可活动防护件在外力作用下可相较于所述底壳在上下方向上运动,以改变所述可活动防护壁的下端的离地距离。
  2. 如权利要求1所述的自动割草机,其特征在于:所述切割机构处于任意切割高度下,所述初始距离的范围为15-35mm。
  3. 如权利要求1所述的自动割草机,其特征在于:所述切割机构处于任意切割高度下,所述可活动防护件在受外力作用下,所述可活动防护件可相较于所述底壳向上运动,以使所述可活动防护壁的离地距离增大,当所述外力消除时,所述可活动防护件可相较于所述底壳向下运动,以使所述可活动防护壁的下端的离地距离回到所述初始距离。
  4. 如权利要求1所述的自动割草机,其特征在于:在将所述切割机构高度由最低档调节至最高档的过程中,所述切割机构可相较于所述可活动防护件在上下方向上运动。
  5. 如权利要求1或4所述的自动割草机,其特征在于:在调节所述切割机构高度过程中,所述可活动防护壁的下端距离地面的距离始终保持不变。
  6. 如权利要求2所述的自动割草机,其特征在于:在所述可活动防护壁受力向上运动过程中,当所述可活动防护壁的下端距地面距离大于一预设草安全抬起高度时,所述可活动防护壁向上运动的阻力大于,当所述可活动防护壁 的下端距地面距离小于所述预设草安全抬起高度时,所述可活动防护壁向上运动的阻力。
  7. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括设置于所述切割机构的前方的前可活动防护壁、设置于所述切割机构后方的后可活动防护壁以及设置于所述切割机构两侧的侧边可活动防护壁中的至少一个。
  8. 如权利要求1或7所述的自动割草机,其特征在于:在水平方向上,所述可活动防护壁的最外缘距所述切割元件的最小距离X的范围为X≥58mm。
  9. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括主活动部,所述主活动部包括位于其最外缘的障碍物通过区,所述障碍物通过区包括由外向内倾斜向下延伸的倾斜面。
  10. 如权利要求9所述的自动割草机,其特征在于:所述可活动防护壁还包括自所述主活动部向下延伸形成的锁定部,所述锁定部包括位于其最外缘的安全锁定区,所述安全锁定区的下端离地距离小于M,所述安全锁定区位于与其同一径向上的障碍物通过区向下的延长线的外侧。
  11. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括设置于其底部的若干在周向上间隔设置的阻挡凸起,所述可活动防护件在不受外力的自由状态下,所述阻挡凸起的下端离地大于等于M/2。
  12. 如权利要求11所述的自动割草机,其特征在于:所述可活动防护壁还包括连接于所述阻挡凸起上方的上阻挡部,所述阻挡凸起的最外缘与所述上阻挡部的外边缘不完全重叠,所述阻挡凸起的不与所述上阻挡部最外缘重叠的部分位于所述上阻挡部的最外缘的对应部分的内侧。
  13. 如权利要求11所述的自动割草机,其特征在于:所述阻挡凸起包括位于其最外缘的安全锁定区,所述安全锁定区包括倾斜面和/或竖直面,当所述安全锁定区为由外向内倾斜向下延伸的倾斜面时,所述安全锁定区自所述安全锁定区的最外端所在的竖直平面向内倾斜的角度小于15度。
  14. 如权利要求11所述的自动割草机,其特征在于:所述阻挡凸起的高度h的范围为:0mm<h≤80mm,或3mm≤h≤20mm;所述阻挡凸起的宽度M的范围为0<m≤40mm,或0<m≤20mm;两相邻的所述阻挡凸起之间的距离S的范围为0<S≤40mm,或3≤S≤25mm。
  15. 如权利要求11所述的自动割草机,其特征在于:所述可活动防护壁还包括在上下方向上延伸的连接相邻两阻挡凸起的连接凸起,所述连接凸起局部向内 凹陷以使所述连接凸起与其所连接的两相邻的所述阻挡凸起共同围成外侧间隔,且内侧封闭的结构。
  16. 如权利要求1所述的自动割草机,其特征在于:所述切割机构处于任意切割高度下,所述初始距离的范围始终小于等于M/2。
  17. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁受外力向上运动到其可活动范围的最高点的过程中,所述阻挡壁的下端始终低于所述切割元件的最低点。
  18. 如权利要求17所述的自动割草机,其特征在于:所述防护组件还包括在上下方向上相较于所述切割机构固定的机构防护件,所述机构防护件包括在水平方向上,位于所述可活动防护壁和所述切割机构之间的机构防护壁,所述阻挡壁还包括所述机构防护壁,所述机构防护壁的下端始终低于所述切割元件的最低点。
  19. 如权利要求18所述的自动割草机,其特征在于:所述壳体包括在水平方向上位于所述切割机构外部的高位壳体,在由外向内的方向上,且在垂直于所述由外向内的方向上延伸M范围内,所述高位壳体距地面的距离始终高于M,在水平方向上,至少部分所述机构防护壁位于所述高位壳体与所述切割机构之间。
  20. 如权利要求18所述的自动割草机,其特征在于:所述机构防护壁包括位于所述切割机构前方的前机构防护壁、位于所述切割机构两侧的侧边机构防护壁、及位于所述切割机构后方的后机构防护壁,所述前机构防护壁、后机构防护壁及侧边机构防护壁共同围成周向上封闭的所述机构防护壁。
  21. 如权利要求20所述的自动割草机,其特征在于:所述机构防护壁在360度的周向上的最底部均低于所述切割元件最低点。
  22. 如权利要求18所述的自动割草机,其特征在于:所述可活动防护壁与机构防护壁在水平方向上的最小距离范围为2~30mm,或2~8mm。
  23. 如权利要求17所述的自动割草机,其特征在于:所述切割机构处于任意切割高度下,所述可活动防护壁受外力向上运动到其可活动范围的最高点时,所述可活动防护壁的下端低于所述切割元件最低点。
  24. 如权利要求23所述的自动割草机,其特征在于:在至少一档切割高度下,当所述可活动防护件受外力在上下方向上运动的过程中,所述可活动防护壁的下端可相较于所述切割机构在上下方向上运动。
  25. 如权利要求24所述的自动割草机,其特征在于:所述自动割草机还包括用于限制所述可活动防护件与所述切割机构在上下方向上相对运动的程度的限位结构。
  26. 如权利要求25所述的自动割草机,其特征在于:所述限位机构包括可相互抵持限位的切割限位部与防护件限位部,所述切割限位部与所述切割机构在上下方向上相对固定,所述防护件限位部与所述可活动防护件在上下方向上相对固定,所述切割限位部与所述防护件相互抵持限位时,所述切割限位部位于所述防护件限位部上方。
  27. 如权利要求25所述的自动割草机,其特征在于:在非调高状态下,当所述切割机构受外力作用时,所述切割机构可相较于地面在上下方向上移动,在至少一档切割高度下,当所述可活动防护件受外力向上运动的过程中,所述可活动防护件先单独向上运动至其与所述切割机构相互限位,再与所述切割机构一起向上运动。
  28. 如权利要求1所述的自动割草机,其特征在于:所述防护组件还包括在上下方向上相较于所述切割机构固定的切割防护件,在水平方向上,所述切割防护件设置于所述可活动防护件内,所述切割防护件的下端低于所述切割元件的最低点,在非调高状态下,所述切割防护件在外力作用下,可与切割机构一起相较于所述底壳在上下方向上运动。
  29. 如权利要求28所述的自动割草机,其特征在于:所述切割机构包括用于固定所述切割元件的刀盘,所述切割防护件包括设置于所述刀盘下方且围绕一中部空腔设置的刀盘防护件,所述刀盘防护件的下端低于所述切割元件的最低点。
  30. 如权利要求1所述的自动割草机,其特征在于:所述自动割草机还包括设置于所述壳体底侧的可弯折的柔性阻挡件,在所述自移动设备前进方向上,所述阻挡件位于所述移动模块的前侧和/或后侧,所述阻挡件包括固定于所述壳体底侧的壳体端,和受外力作用下可相较于所述壳体端运动的自由端,所述壳体端与所述移动模块间隔设置,所述自由端在外力作用下可与所述移动模块抵持接触。
  31. 如权利要求1所述的自动割草机,其特征在于:所述自动割草机还包括用于安装所述切割元件的刀盘,所述切割元件设置于所述刀盘的上方。
  32. 如权利要求1所述的自动割草机,其特征在于:在所述自动割草机移动的过程中,当所述可活动防护壁受由外向内的力作用时,所述可活动防护壁的 下端相较于地面的距离可大于等于M,其中,38mm≤M≤40mm。
  33. 如权利要求1或32所述的自动割草机,其特征在于:所述可活动防护壁的下端在上下方向上移动的距离范围为15-80mm,或20-40mm。
  34. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括位于其下端,且沿周向连续延伸的压草端面。
  35. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括沿上下方向延伸的竖防护壁及位于所述竖防护壁下方且沿水平方向延伸的横防护壁,所述横防护壁在水平的内外方向上的至少一侧突出于所述竖防护壁的对应一侧。
  36. 如权利要求1所述的自动割草机,其特征在于:所述自动割草机还包括用于连接所述可活动防护件与所述壳体的防护件向上引导机构,当所述可活动防护件受到由外向内的力的作用时,所述防护件向上引导机构允许所述可活动防护壁向上运动。
  37. 如权利要求36所述的自动割草机,其特征在于:所述向上引导机构包括四连杆、两连杆、单杆或滑槽中至少一个。
  38. 如权利要求36所述的自动割草机,其特征在于:所述自动割草机还包括用于连接所述切割机构与所述壳体的切割向上引导机构。
  39. 如权利要求36所述的自动割草机,其特征在于:所述可活动防护件包括上防护件和下防护件,当所述下防护件受到外力作用时,所述下防护件可相较于所述上防护件在上下方向上移动。
  40. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护件设置于所述壳体外侧、和/或设置于所述切割机构与所述壳体之间和/或连接于所述壳体的局部。
  41. 如权利要求1所述的自动割草机,其特征在于:所述可活动防护壁包括设置于所述切割机构前方的前可活动防护壁,所述防护组件还包括设有后可活动防护壁的后可活动防护件,所述后可活动防护壁设置于所述切割机构的后方,当所述后可活动防护件受外力作用时,所述后可活动防护壁的下端相较于地面可产生上下方向上的相对位移。
  42. [根据细则91更正 28.07.2020] 
    如权利要求41所述的自动割草机,其特征在于:在外力作用下,所述可活动防护件与所述后可活动防护件可相对独立运动。
  43. [根据细则91更正 28.07.2020] 
    如权利要求40或41所述的自动割草机,其特征在于:所述后可活动防 护件包括一端固定于所述壳体上的挡板,所述挡板包括固定于所述壳体的固定端及受外力可绕所述固定端转动的活动端。
  44. [根据细则91更正 28.07.2020] 
    如权利要求40或41所述的自动割草机,其特征在于:当所述前可活动防护件受到竖直向上的作用力时,所述前可活动防护件能够在上下方向上移动;而当所述后可活动防护件受到竖直向上的作用力时,所述后可活动防护件无法在上下方向上移动。
  45. [根据细则91更正 28.07.2020] 
    如权利要求40或41所述的自动割草机,其特征在于:所述可活动防护壁还包括设置于所述自动割草机两侧的侧边可活动防护壁,所述前可活动防护壁与所述侧边可活动防护壁相互连接,以使所述侧边可活动防护壁与所述前可活动防护壁受外力作用时可同步在上下方向上运动。
PCT/CN2020/096882 2019-06-18 2020-06-18 自动割草机 WO2020253794A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/621,169 US20220354050A1 (en) 2019-06-18 2020-06-18 Autonomous lawn mower
EP20826655.1A EP3987914A4 (en) 2019-06-18 2020-06-18 AUTOMATIC LAWN MOWER

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201910523837 2019-06-18
CN201910523837.7 2019-06-18
CN201921884636.1 2019-11-04
CN201921884636.1U CN211531884U (zh) 2019-11-04 2019-11-04 自移动设备
CN202010307394 2020-04-17
CN202010307394.0 2020-04-17

Publications (1)

Publication Number Publication Date
WO2020253794A1 true WO2020253794A1 (zh) 2020-12-24

Family

ID=74036895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/096882 WO2020253794A1 (zh) 2019-06-18 2020-06-18 自动割草机

Country Status (4)

Country Link
US (1) US20220354050A1 (zh)
EP (1) EP3987914A4 (zh)
DE (1) DE202020005799U1 (zh)
WO (1) WO2020253794A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4140281A1 (en) * 2021-08-31 2023-03-01 Stiga S.p.A. in breve anche St. S.p.A. Mobile device with an articulation system effective between an operating body and a support frame and with an obstacle detector functionally connected to an actuator of the articulation system
EP4265096A1 (en) * 2022-03-18 2023-10-25 Techtronic Cordless GP Multi-directional blade guard

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4292417A1 (de) * 2022-06-13 2023-12-20 Andreas Stihl AG & Co. KG Verfahren und system zum betreiben eines autonomen mobilen grünflächenbearbeitungsroboters
DE202023106900U1 (de) 2023-04-19 2024-02-06 Makita Corporation Grasmäher und Grasmähführung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5703450A (en) * 1994-06-27 1997-12-30 Josephs; Harold Safety guard for pedestrian-operated machines having rotatable blades
US20070051086A1 (en) * 2005-09-06 2007-03-08 David Zeigler Flexible guard
EP2119337B1 (en) * 2008-05-13 2011-03-16 Honda Motor Co., Ltd. Riding lawn mower
CN103371033A (zh) * 2012-04-24 2013-10-30 罗伯特·博世有限公司 用于草坪修剪机的切割器保护装置
CN205179745U (zh) * 2015-10-13 2016-04-27 苏州宝时得电动工具有限公司 割草机
CN106561148A (zh) * 2015-10-13 2017-04-19 苏州宝时得电动工具有限公司 割草机
CN206413414U (zh) * 2017-01-19 2017-08-18 苏州科瓴精密机械科技有限公司 割草机器人

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104067768B (zh) * 2014-06-06 2016-08-17 浙江亚特电器有限公司 割草机防护装置及割草机
CN105875063B (zh) * 2015-02-17 2019-02-19 苏州宝时得电动工具有限公司 割草机
CN105875023B (zh) * 2015-02-17 2019-01-18 苏州宝时得电动工具有限公司 割草机
JP2016208950A (ja) * 2015-05-13 2016-12-15 シャープ株式会社 ガード機構及び芝刈機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5703450A (en) * 1994-06-27 1997-12-30 Josephs; Harold Safety guard for pedestrian-operated machines having rotatable blades
US20070051086A1 (en) * 2005-09-06 2007-03-08 David Zeigler Flexible guard
EP2119337B1 (en) * 2008-05-13 2011-03-16 Honda Motor Co., Ltd. Riding lawn mower
CN103371033A (zh) * 2012-04-24 2013-10-30 罗伯特·博世有限公司 用于草坪修剪机的切割器保护装置
CN205179745U (zh) * 2015-10-13 2016-04-27 苏州宝时得电动工具有限公司 割草机
CN106561148A (zh) * 2015-10-13 2017-04-19 苏州宝时得电动工具有限公司 割草机
CN206413414U (zh) * 2017-01-19 2017-08-18 苏州科瓴精密机械科技有限公司 割草机器人

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4140281A1 (en) * 2021-08-31 2023-03-01 Stiga S.p.A. in breve anche St. S.p.A. Mobile device with an articulation system effective between an operating body and a support frame and with an obstacle detector functionally connected to an actuator of the articulation system
EP4265096A1 (en) * 2022-03-18 2023-10-25 Techtronic Cordless GP Multi-directional blade guard

Also Published As

Publication number Publication date
US20220354050A1 (en) 2022-11-10
EP3987914A4 (en) 2023-01-04
DE202020005799U1 (de) 2022-08-30
EP3987914A1 (en) 2022-04-27

Similar Documents

Publication Publication Date Title
WO2020253794A1 (zh) 自动割草机
CN213907507U (zh) 自动割草机
WO2017198226A1 (zh) 自移动设备及其控制方法
CN106561148B (zh) 智能割草机
US10244678B2 (en) Blade guard for a robot lawnmower
WO2017063539A1 (zh) 割草机
CN108323310B (zh) 割草机器人
CN113940186A (zh) 一种智能割草机的控制方法
WO2016131399A1 (zh) 自动行走设备
WO2020098666A1 (zh) 割草机器人
CN113950935B (zh) 一种用于割草机器人的滑动式压力检测装置和割草机器人
CN114532052A (zh) 智能割草机
JP2000188919A (ja) 自走式草刈機およびその草刈方法
WO2021078220A1 (zh) 自动割草机及其控制方法
CN214757977U (zh) 一种活动挡边结构和自行走设备
CN212696652U (zh) 自动割草机
WO2021180123A1 (zh) 切割装置及智能割草机
CN118338776A (zh) 智能割草机
WO2023006110A1 (zh) 自动割草机
CN115669352A (zh) 自动行走设备
CN113303099A (zh) 一种活动挡边结构和自行走设备
WO2018133758A1 (zh) 割草机器人
CN111972117A (zh) 一种智能割草机

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20826655

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020826655

Country of ref document: EP

Effective date: 20220118