WO2020211374A1 - 一种割草机器人 - Google Patents

一种割草机器人 Download PDF

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Publication number
WO2020211374A1
WO2020211374A1 PCT/CN2019/119466 CN2019119466W WO2020211374A1 WO 2020211374 A1 WO2020211374 A1 WO 2020211374A1 CN 2019119466 W CN2019119466 W CN 2019119466W WO 2020211374 A1 WO2020211374 A1 WO 2020211374A1
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WO
WIPO (PCT)
Prior art keywords
protective plate
lawn mower
main body
mower robot
robot according
Prior art date
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PCT/CN2019/119466
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English (en)
French (fr)
Inventor
孔钊
高向阳
韩奎
Original Assignee
苏州科瓴精密机械科技有限公司
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Publication of WO2020211374A1 publication Critical patent/WO2020211374A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/20—Devices for protecting men or animals

Definitions

  • the invention relates to the technical field of forestry machinery, in particular to a lawn mower robot.
  • Lawn mower is a kind of mechanical tool used for mowing lawn and vegetation. It is composed of cutter head, engine, walking wheel, walking mechanism, blade, armrest and control part.
  • the cutter head is installed on the traveling wheel, the cutter head is equipped with an engine, and the output shaft of the engine is equipped with blades.
  • the blade is located at the bottom of the lawnmower. When the lawnmower is working, the blade uses the engine to rotate at a high speed to complete the weeding work. If children or operators accidentally extend their arms into the bottom of the mower at this time, it will be dangerous.
  • the general practice is to lower the machine chassis or add a fixed protective plate. Lowering the machine chassis can reduce the distance between the machine and the ground. The distance between the fixed protective plate and the ground is smaller than the width of the child’s arm, so the child’s arm Cannot reach into the lower part of the machine. But this will affect the machine's ability to walk and overcome obstacles, and it is easy to crash the chassis or the protective plate.
  • the purpose of the present invention is to provide a lawn mower robot to provide more comprehensive and safe protection without affecting the walking and obstacle crossing of the machine.
  • a lawn mower robot includes a main body and a cutting mechanism arranged at the bottom end of the main body.
  • a protective plate is arranged at the rear of the cutting mechanism along the advancing direction of the lawn mower robot. When the protective plate is in an initial working position The protective plate is configured to be able to rotate in only one direction toward the rear side, and the vertical distance between the bottom end of the protective plate and the ground plane is less than a set distance.
  • the set distance is 38mm.
  • the vertical distance between the bottom end of the protective plate and the ground plane is equal to 30 mm.
  • the protective plate and the main body are connected by a rotating shaft, and the front part of the protective plate on the main body is provided with a limit part for restricting the forward rotation of the protective plate.
  • a torsion spring is sleeved on the rotating shaft, and when the protective plate rotates to abut against the torsion spring, the torsion spring provides a forward elastic restoring force to the protective plate.
  • the main body has a housing, a notch is provided on the housing, the protective plate is rotatably arranged at the notch, and the limiting portion is a side wall of the notch.
  • the limiting portion is a baffle that can abut against the protective plate.
  • the protective plate includes a first part connected with the rotating shaft and a second part extending backward and downward from the first part, and at least part of the first part can abut against the limiting part .
  • the end of the first part is provided with a guide arc surface, and when the guard plate rotates backward, the guide arc surface is in sliding contact with the limiting part.
  • a reinforcing rib is provided between the first part and the second part.
  • a walking assembly is provided on the main body, the walking assembly includes a front wheel and a rear wheel, and the protective plate is located between the two rear wheels.
  • the protective plate can rotate backward in one direction.
  • the protective plate When the protective plate is in the initial position, the lawn mower robot moves forward, and obstacles and grass on the ground in front
  • the protective plate can be pushed open so that the protective plate rotates backwards without hindering the advancement of the lawn mower robot; when a foreign object acts on the protective plate from back to front at the rear of the protective plate, the protective plate is stationary, It cannot rotate to the front of the main body, thereby preventing the entry of foreign objects or children's arms, meeting safety requirements and providing more comprehensive and safe protection, without affecting the walking and obstacle crossing of the lawn mower robot.
  • the vertical distance between the bottom end of the protective plate and the ground plane is less than 38mm, which can prevent children from extending their arms under the main body at the rear of the cutting mechanism.
  • Fig. 1 is a schematic structural diagram of a lawn mower robot provided by an embodiment of the present invention
  • Figure 2 is a rear view of the lawn mower robot in Figure 1;
  • Figure 3 is a partial cross-sectional view of the lawn mower robot in Figure 1;
  • Figure 4 is an enlarged view of A in Figure 3;
  • Fig. 5 is a schematic diagram of the protective plate in Fig. 3 being rotated backward;
  • Fig. 6 is an enlarged view of B in Fig. 5.
  • connection should be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components.
  • connection may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components.
  • the "above” or “below” of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them.
  • “above”, “above” and “above” the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature.
  • the “below”, “below” and “below” the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • an embodiment of the present invention provides a lawn mowing robot, which can automatically walk on the ground and complete the mowing action.
  • the mowing robot includes a main body 1, a working module installed on the main body 1 for mowing the lawn, and a walking module.
  • the walking module generally includes four walking wheels for walking and turning.
  • the working module includes a cutting motor and a transmission connected to the cutting motor. Shaft and cutting mechanism mated with the drive shaft.
  • the lawn mower robot also includes a control module for coordinating the work module and the walking module. The control module can make the lawn mower robot walk and cut the lawn automatically without guarding.
  • the main body 1 includes a housing located on the upper part of the lawn mower robot and a machine chassis located at the lower part of the lawn mower robot, and the machine chassis is connected to the housing.
  • the cutting motor is preferably a cutting motor.
  • the cutting mechanism includes a blade holder and a blade installed on the blade holder.
  • the cutting mechanism is arranged at the bottom end of the main body 1 to facilitate cutting grass.
  • the cutting motor is fixed at the approximate center of the machine chassis, and the output shaft of the cutting motor extends downward to connect with the blade support.
  • the blade is located on the periphery of the blade support and rotates with the blade support.
  • a protective plate 2 is provided at the rear of the cutting mechanism, and the protective plate 2 is configured to be able to rotate in only one direction toward the rear side.
  • the protective plate 2 is allowed to rotate backward, and the protective plate 2 is restricted from rotating forward. That is to say, when the protective plate 2 is in the initial position, the protective plate 2 can rotate backward in one direction, but cannot rotate toward the front of the main body 1.
  • the protective plate 2 When the lawn mower robot is placed normally, the protective plate 2 is in the initial position; when a foreign object acts on the protective plate 2 from back to front at the rear of the protective plate 2, the protective plate 2 is still and cannot move toward the front of the main body 1. Rotate to prevent the entry of foreign objects.
  • the lawn mower robot When the lawn mower robot is moving forward, the obstacles and grass on the ground in front can push away the protective plate 2 so that the protective plate 2 rotates backward without hindering the progress of the lawn mower robot, thus realizing more comprehensive safety. At the same time, it does not affect the walking and obstacle crossing of the lawn mower robot. In other words, when a child or an operator tries to extend the arm under the main body 1 at the rear of the main body 1, the protective plate 2 cannot rotate to the front of the main body 1, thereby preventing the arm from extending.
  • the vertical distance between the bottom end of the protective plate 2 and the ground plane is less than the set distance.
  • the set distance is 38 mm, that is, the vertical distance between the bottom end of the protective plate 2 and the ground plane is less than 38 mm, so that The distance between the lowest point of the protective plate 2 and the ground should be less than the width of the child's arm, which can further prevent children from extending the arm under the main body 1 at the rear of the cutting mechanism.
  • the vertical distance between the bottom end of the protective plate 2 and the ground plane is equal to 30 mm, which ensures that the human arm cannot reach in to avoid personal injury.
  • the bottom end of the protective plate 2 is the line or plane with the shortest vertical distance from the ground plane when the protective plate 2 does not rotate.
  • the vertical distance between the bottom end of the protective plate 2 and the ground plane can also be equal to 28mm, 29mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, etc., as long as it is less than the set distance 38mm OK.
  • the four walking wheels include two front wheels and two rear wheels.
  • the protective plate 2 is located between the two rear wheels and does not affect the movement and steering of the walking wheels.
  • the protective plate 2 may be configured as a flat plate extending in one direction, or may be configured as an integrally arranged bent plate as shown in this embodiment.
  • the protective plate 2 includes a first part 21 connected with the rotating shaft 3 and a second part 22 extending backward and downward from the first part 21, and at least part of the first part 21 can abut against the limiting part 4.
  • the protective plate 2 includes a first part 21 and a second part 22 that are connected to each other.
  • the second part 22 extends backward and downward relative to the first part 21.
  • the first part 21 can serve as a limiter, and the second part 22 can increase
  • the protection space of the large protective plate 2 is convenient for obstacles on the ground to easily push the protective plate 2 away.
  • the first part 21 and the second part 22 are arranged at an obtuse angle.
  • a reinforcing rib 23 is provided between the first part 21 and the second part 22, and a plurality of reinforcing ribs 23 are arranged at intervals in parallel.
  • the first part 21, the second part 22 and the reinforcing rib 23 are integrally formed, which is convenient for processing and production.
  • the protective plate 2 and the main body 1 are connected by a rotating shaft 3, and the main body 1 is provided with a limit part 4 on the front of the protective plate 2.
  • the protective plate 2 When the protective plate 2 receives an external force toward the rear of the main body 1, the protective plate 2 will rotate around the rotating shaft 3, so that when the lawn mower robot moves forward, obstacles and grass on the ground in front of the protective plate 2 can be pushed away.
  • the protective plate 2 When the protective plate 2 receives an external force toward the front of the main body 1, the protective plate 2 is blocked by the stopper 4, so that when a child or an operator tries to extend his arm under the main body 1 at the back of the main body 1, The protective plate 2 cannot rotate to the front of the main body 1, preventing the arm from extending in.
  • the end of the first part 21 of the protective plate 2 away from the second part 22 is rotatably connected to the main body 1, and the end of the first part 21 is provided with a guiding arc surface 24.
  • the first part 21 abuts against the limiting part 4.
  • the protective plate 2 receives an external force toward the rear of the main body 1, the protective plate 2 rotates backwards and guides the arc surface 24 to the limiting part 4 Sliding contact, when the protective plate 2 rotates to the final position, the guiding arc surface 24 is separated from the limiting portion 4.
  • the setting of the guide arc surface 24 facilitates the smooth rotation of the protective plate 2 and prevents interference between the protective plate 2 and the limit part 4.
  • the limiting portion 4 may be a baffle that can abut against the protective plate 2, the baffle is located at the front of the protective plate 2, and the baffle extends in the vertical direction. In this embodiment, when the protective plate 2 is in the initial position, the limiting portion 21 extends in the vertical direction.
  • the limiting portion 4 can also be improved by using the existing structure of the main body 1.
  • the main body 1 has a housing, a notch is provided on the housing, the protective plate 2 is rotatably arranged at the notch, and the limiting portion 4 is a side wall of the notch.
  • the side wall of the notch is used as the limit part 4 to reduce the number of parts, make minor changes, and reduce costs.
  • a torsion spring 5 is sleeved on the rotating shaft 3.
  • the torsion spring 5 provides a forward elastic restoring force to the protective plate 2 to facilitate the automatic reset of the protective plate 2.
  • the protective plate 2 receives an external force toward the rear of the main body 1, the protective plate 2 will rotate around the axis 3, so that when the lawn mower robot moves forward, obstacles and grass on the ground in front of the protective plate 2 can be pushed aside. After the obstacle, the protective plate 2 is reset under the action of the torsion spring 5.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
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Abstract

一种割草机器人，包括主体（1）和设置于所述主体（1）的底端的切割机构，沿割草机器人的前进方向，在所述切割机构的后部设置防护板（2），当所述防护板（2）处于初始工作位置时，所述防护板（2）被配置为仅可朝后侧单向转动，所述防护板的最底端与地平面之间的垂直距离小于设定距离。割草机器人在前进时，前方的地面上的障碍物和草能够从前向后推开防护板（2），使得防护板（2）向后旋转，而不会对割草机器人的前进产生阻碍；当有异物在防护板（2）的后部从后向前作用于防护板（2）时，防护板（2）静止不动，无法向主体（1）的前部旋转，进而阻止异物或小孩手臂进入。

Description

一种割草机器人 技术领域
本发明涉及林业机械技术领域，尤其涉及一种割草机器人。
背景技术
割草机是一种用于修剪草坪和植被等的机械工具，它是由刀盘、发动机、行走轮、行走机构、刀片、扶手和控制部分组成。刀盘装在行走轮上，刀盘上装有发动机，发动机的输出轴上装有刀片。
刀片位于割草机底部，在割草机工作时，刀片利用发动机进行高速旋转完成除草工作。如果儿童或者操作人员此时不小心将手臂伸入割草机的底部，将会产生危险。
一般做法是，将机器底盘做低或者增加一个固定防护板，将机器底盘做低能够减小机器与地面之间的距离，固定防护板与地面之间的距离小于儿童手臂的宽度，从而儿童手臂无法伸入到机器下部。但是这样会影响机器的行走和越障能力，容易撞坏底盘或者防护板。
发明内容
本发明的目的在于提供一种割草机器人，以提供更加全面安全的防护，且不影响机器行走和越障。
如上构思，本发明所采用的技术方案是：
一种割草机器人，包括主体和设置于所述主体的底端的切割机构，沿割草机器人的前进方向，在所述切割机构的后部设置防护板，当所述防护板处于初始工作位置时，所述防护板被配置为仅可朝后侧单向转动，所述防护板的最底端与地平面之间的垂直距离小于设定距离。
其中，所述设定距离为38mm。
其中，所述防护板的最底端与地平面之间的垂直距离等于30mm。
其中，所述防护板与所述主体之间通过转轴连接，所述主体上于所述防护板的前部设置有用于限制所述防护板向前转动的限位部。
其中，所述转轴上套设有扭簧，当所述防护板转动至与所述扭簧抵接时，所述扭簧对防护板提供向前的弹性回复力。
其中，所述主体具有外壳，所述外壳上设置有槽口，所述防护板转动设置于所述槽口处，所述限位部为所述槽口的侧壁。
其中，所述限位部为能够与所述防护板抵接的挡板。
其中，所述防护板包括与所述转轴相连接的第一部和自所述第一部向后向下延伸的第二部，至少部分所述第一部可与所述限位部抵接。
其中，所述第一部的端部设置有导向弧面，在所述防护板朝后转动过程中，所述导向弧面与所述限位部滑动接触。
其中，所述第一部与所述第二部之间设置有加强筋。
其中，所述主体上设置有行走组件，所述行走组件包括前轮和后轮，所述防护板位于两个所述后轮之间。
本发明的有益效果：
本发明提出的割草机器人，通过在切割机构的后部设置防护板，防护板能够朝后单向旋转，在防护板处于初始位置时，割草机器人前进，前方的地面上的障碍物和草能够推开防护板，使得防护板向后旋转，而不会对割草机器人的前进产生阻碍；当有异物在防护板的后部从后向前作用于防护板时，防护板静止不动，无法向主体的前部旋转，进而阻止异物或儿童手臂的进入，满足安规的要求且在提供更加全面安全的防护的同时，不影响割草机器人行走和越障。 防护板的最底端与地平面之间的垂直距离小于38mm，能够防止有儿童在切割机构的后部将手臂伸入主体的下方。
附图说明
图1是本发明实施例提供的割草机器人的结构示意图；
图2是图1中的割草机器人的后视图；
图3是图1中的割草机器人的局部剖视图；
图4是图3中A处的放大图；
图5是图3中的防护板处于向后旋转状态的示意图；
图6是图5中B处的放大图。
图中：
1、主体；
2、防护板；21、第一部；22、第二部；23、加强筋；24、导向弧面；
3、转轴；
4、限位部；
5、扭簧。
具体实施方式
下面详细描述本发明的实施例，实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间 媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
参见图1和图2，本发明实施例提供一种割草机器人，割草机器人能够在地面上自动行走并完成割草动作。割草机器人包括主体1、安装于主体1上用于修剪草坪的工作模块以及行走模块，行走模块一般包括四个行走轮，用于行走和转向，工作模块包括切割马达、与切割马达连接的传动轴以及与传动轴配接的切割机构。当然，割草机器人还包括控制模块，用于协调工作模块和行走模块，控制模块能够使割草机器人在无人看守的情况下自动在草坪上行走并割草。
主体1包括位于割草机器人上部的机壳以及位于割草机器人下部的机器底盘，机器底盘连接于机壳。切割马达优选为切割电机，切割机构包括刀片支架以及安装在刀片支架上的刀片，切割机构设置在主体1的底端，便于对草进行切割。切割电机固定在机器底盘的大致中心位置，切割电机的输出轴向下延伸与刀片支架连接，刀片位于刀片支架的周边，随刀片支架旋转。
在实施例的附图中，仅示出割草机器人的部分结构。
沿割草机器人的前进方向，在所述切割机构的后部设置防护板2，所述防护板2被配置为仅可朝后侧单向转动。在防护板2处于初始位置时，防护板2被允许朝后转动，并且防护板2被限制朝前转动。也就是说，在防护板2处于初始位置时，防护板2能够朝后单向旋转，而不能朝向主体1的前部旋转。
割草机器人在正常放置时，防护板2处于初始位置；当有异物在防护板2的后部从后向前作用于防护板2时，防护板2静止不动，无法向主体1的前部旋转，进而阻止异物的进入。割草机器人在前进时，前方的地面上的障碍物和草能够推开防护板2，使得防护板2向后旋转，而不会对割草机器人的前进产生阻碍，从而实现在提供更加全面安全的防护的同时，不影响割草机器人行走和越障。也就是说，当有儿童或者操作人员在主体1的后部试图将手臂伸入主体1的下方时，防护板2无法向主体1的前部旋转，进而阻止手臂的伸入。
防护板2的最底端与地平面之间的垂直距离小于设定距离，本实施方式中设定距离为38mm，即防护板2的最底端与地平面之间的垂直距离小于38mm，使得防护板2最低点与地面的距离应小于儿童手臂的宽度，能够进一步防止有儿童在切割机构的后部将手臂伸入主体1的下方。
在本实施例中，防护板2的最底端与地平面之间的垂直距离等于30mm，确保人体手臂伸不进去避免人身伤害。防护板2的最底端即在防护板2不旋转的情况下，与地平面之间的垂直距离最短的那一条线或者一个平面。在其他不同实施例中，防护板2的最底端与地平面之间的垂直距离也可以等于28mm、29mm、31mm、32mm、33mm、34mm、35mm、36mm、37mm等，只要小于设定距离38mm即可。
四个行走轮包括两个前轮和两个后轮，防护板2位于两个后轮之间，不影响行走轮的移动和转向。
结合图3至图6，防护板2可以设置成沿一个方向延伸的平板，也可以设置成如本实施例中所示的一体设置的弯折板。具体地，防护板2包括与转轴3相连接的第一部21和自第一部21向后向下延伸的第二部22，至少部分第一部21可与限位部4抵接。
防护板2包括相互连接的第一部21和第二部22，第二部22相对于第一部21向后向下延伸，第一部21能够起到限位作用，第二部22能够增大防护板2的保护空间，且便于地面上的障碍物轻松推开防护板2。在本实施例中，第一部21与第二部22之间呈钝角设置。
为了保证结构强度，在第一部21与第二部22之间设置有加强筋23，多个加强筋23平行间隔设置。第一部21、第二部22和加强筋23一体成型，便于加工生产。
防护板2与主体1之间通过转轴3连接，主体1上于防护板2的前部设置有限位部4。防护板2在受到朝向主体1后部的外力时，防护板2会绕转轴3旋转，进而使得割草机器人在前进时，前方的地面上的障碍物和草能够推开防护板2。防护板2在受到朝向主体1前部的外力时，防护板2会被限位部4阻挡，进而使得当有儿童或者操作人员在主体1的后部试图将手臂伸入主体1的下方时，防护板2无法向主体1的前部旋转，阻止手臂的伸入。
具体地，防护板2的第一部21远离第二部22的一端与主体1转动连接，第一部21的端部设置有导向弧面24。当防护板2在初始位置时，第一部21与限位部4抵接，当防护板2受到朝向主体1后部的外力时，防护板2向后旋转，导向弧面24与限位部4滑动接触，当防护板2转动至最终位置，导向弧面24与限位部4脱离。导向弧面24的设置，便于防护板2顺畅进行旋转，防止防护板2与限位部4之间产生干涉。
限位部4可以是能够与防护板2抵接的挡板，挡板位于防护板2的前部，挡板沿竖直方向延伸。在本实施例中，当防护板2在初始位置时，限位部21沿竖直方向延伸。
限位部4还可以是借助主体1的现有结构进行改进。主体1具有外壳，外壳上设置有槽口，防护板2转动设置于槽口处，限位部4为槽口的侧壁。在此，借助槽口的侧壁作为限位部4，减少零部件数量，改动较小，降低成本。
转轴3上套设有扭簧5，当防护板2转动至与扭簧5抵接时，扭簧5对防护板2提供向前的弹性回复力，便于防护板2自动复位。防护板2在受到朝向主体1后部的外力时，防护板2会绕转轴3旋转，进而使得割草机器人在前进时，前方的地面上的障碍物和草能够推开防护板2，待越过障碍物之后，防护板2在扭簧5的作用下复位。
以上实施方式只是阐述了本发明的基本原理和特性，本发明不受上述实施方式限制，在不脱离本发明精神和范围的前提下，本发明还有各种变化和改变，这些变化和改变都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (11)

  1. 一种割草机器人，包括主体(1)和设置于所述主体(1)的底端的切割机构，其特征在于，沿割草机器人的前进方向，在所述切割机构的后部设置防护板(2)，当所述防护板(2)处于初始工作位置时，所述防护板(2)被配置为仅可朝后侧单向转动，所述防护板(2)的最底端与地平面之间的垂直距离小于设定距离。
  2. 根据权利要求1所述的割草机器人，其特征在于，所述设定距离为38mm。
  3. 根据权利要求2所述的割草机器人，其特征在于，所述防护板(2)的最底端与地平面之间的垂直距离等于30mm。
  4. 根据权利要求1所述的割草机器人，其特征在于，所述防护板(2)与所述主体(1)之间通过转轴(3)连接，所述主体(1)上于所述防护板(2)的前部设置有用于限制所述防护板(2)向前转动的限位部(4)。
  5. 根据权利要求4所述的割草机器人，其特征在于，所述转轴(3)上套设有扭簧(5)，当所述防护板(2)转动至与所述扭簧(5)抵接时，所述扭簧(5)对防护板(2)提供向前的弹性回复力。
  6. 根据权利要求4所述的割草机器人，其特征在于，所述主体(1)具有外壳，所述外壳上设置有槽口，所述防护板(2)转动设置于所述槽口处，所述限位部(4)为所述槽口的侧壁。
  7. 根据权利要求4所述的割草机器人，其特征在于，所述限位部(4)为能够与所述防护板(2)抵接的挡板。
  8. 根据权利要求4所述的割草机器人，其特征在于，所述防护板(2)包括与所述转轴(3)相连接的第一部(21)和自所述第一部(21)向后向下延伸的第二部(22)，至少部分所述第一部(21)可与所述限位部(4)抵接。
  9. 根据权利要求8所述的割草机器人，其特征在于，所述第一部(21)的 端部设置有导向弧面(24)，在所述防护板(2)朝后转动过程中，所述导向弧面(24)与所述限位部(4)滑动接触。
  10. 根据权利要求8所述的割草机器人，其特征在于，所述第一部(21)与所述第二部(22)之间设置有加强筋(23)。
  11. 根据权利要求1-10任一项所述的割草机器人，其特征在于，所述主体(1)上设置有行走组件，所述行走组件包括前轮和后轮，所述防护板(2)位于两个所述后轮之间。
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