WO2019153657A1 - 一种步行式割草机 - Google Patents

一种步行式割草机 Download PDF

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Publication number
WO2019153657A1
WO2019153657A1 PCT/CN2018/096601 CN2018096601W WO2019153657A1 WO 2019153657 A1 WO2019153657 A1 WO 2019153657A1 CN 2018096601 W CN2018096601 W CN 2018096601W WO 2019153657 A1 WO2019153657 A1 WO 2019153657A1
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WIPO (PCT)
Prior art keywords
lawn mower
grounding
cutting tool
holding member
rotation
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PCT/CN2018/096601
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English (en)
French (fr)
Inventor
栗原克己
久我敏德
Original Assignee
怡天技动力机械研发（临沂）有限公司
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Publication of WO2019153657A1 publication Critical patent/WO2019153657A1/zh

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Classifications

    • 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
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters

Definitions

  • the present application relates to a mowing device, and in particular to a walking lawn mower.
  • a hand-push lawn mower is used as a weeding machine for removing field growth
  • the lawn mower includes a rotary cutter for generating a rotary power engine or a motor, and a front end of the operation lever, and the lawn mower is mounted on a wheel and a handlebar.
  • the operator walks the handlebars and moves the mower along the ground to perform the required mowing operations.
  • Figures 6 and 7 are an example of the construction of such a lawn mower.
  • 1 is the rack, and the power source such as the engine and the motor is fixed on the frame 1.
  • the drive tube 3 connected to the power source 2 extends, and the inside of the drive tube 3 incorporates a rotating member that transmits power generated by the power source 2 to the outside.
  • the front end of the drive tube 3 is connected to a rotary cutter holding member 4, and a rotating member built in the drive tube 3 so as to be rotatable about the rotation axis X-X.
  • a rotary cutter from the central portion of the rotary cutter holding member 4, the nylon cord cutting blade 5 projects in a projected manner.
  • the frame 1 has a set of wheels 6 and 7 that are free to rotate relative to the frame to form a handle portion that forms part of the frame.
  • the operator uses the wheel 6 as a fulcrum to move the handle portion 7 up and down, rotates the lower portion of the tool holding member 4 to the ground state, and pushes the handle portion 7 by hand to move the lawn mower relative to the ground by the rotation of the wheel 6.
  • Weed cutting for example, the diameter of the nylon rope is 2.2 to 3 mm, the distance from the center of rotation to the front end is 180 mm, the rotation speed is 5000 to 8000 rpm, and the front end portion rotates at a high speed, and has sufficient kinetic energy when cutting soft weeds.
  • the prior art has the following disadvantages: 1. The portion of the nylon cutting tool that cuts the weeds from the center of the rotation, the cutting speed of the nylon rope is slow, and the grass is stalked; 2. The rotation in rotation The tool holding part will touch the ground, and there will be resistance between the ground and the ground, which will lose energy and prevent the hand of the mower from pushing forward. 3. When the rotating tool touches the ground, there is a danger of scattering of small stones and other debris.
  • the present application provides a walking lawn mower that separates a rotary cutter from a ground to avoid entanglement and can smoothly advance.
  • a walking lawn mower including a support frame, on which a cutting tool is mounted, and the cutting tool includes a rotation that is rotatable about a cutting tool mounting shaft.
  • a grounding member that is centered and rotatable relative to the holding member is provided with a guiding portion that is aligned with the traveling direction on the grounding side of the grounding member.
  • the guide portion includes at least one linear sled bar that is the same as the traveling direction.
  • the linear skid is asymmetric with respect to a plane passing through the center of rotation and at right angles to the linear direction of the linear skid.
  • the area of the grounding member is asymmetrical with respect to a plane passing through the center of rotation and at right angles to the traveling direction.
  • the outer edge portion of the grounding member is provided with an annular flange.
  • a grounding member that is freely rotatable with respect to the nylon cord holding member is provided on the ground side, and is grounded during operation so as to almost stop sliding on the ground, and the frictional resistance between the ground and the nylon cord holding member is reduced.
  • the position of cutting the weeds is limited to the outer circumference of the nylon rope to prevent entanglement.
  • a linear sled bar is provided, and when the hand mower advances, the frictional resistance between the grounding member and the ground is reduced.
  • the direction of the linear skid can be self-adjusting in order to move in the direction in which the forward resistance is minimized.
  • the present invention is advantageous in that the rotary cutter for a hand-held lawn mower and the lawn mower using the same according to the present invention have a grounding member that can be kept in a stationary state when it is in contact with the ground, and is grounded.
  • the sled bar provided on the material reduces the frictional resistance between the nylon cord holding member and the ground when the mowing is carried forward, and is easier to operate to advance in a desired direction.
  • FIG. 1 is a perspective view showing a three-dimensional structure of a rotary cutter for a hand-push lawn mower and a heavy portion of the lawn mower using the cutter;
  • FIG. 2 is a side view showing a schematic view of an important part of a rotary cutter for a hand-push lawn mower and a lawn mower using the same;
  • Figure 3 is a schematic plan view showing a schematic view of an important part of a rotary cutter for a hand-held lawn mower and a lawn mower using the same according to the present invention;
  • Figure 4 is a plan view showing the planar structure of a rotary cutter for a hand-push lawn mower according to the present invention
  • Figure 5 is a schematic cross-sectional view showing a rotary cutter for a hand-push lawn mower according to the present invention
  • Figure 6 is a schematic perspective view of a prior art hand-push lawn mower
  • Fig. 7 is a side view showing the structure of a prior art hand-push lawn mower.
  • FIG. 1 to FIG. 3 there is a lawn mower having a structure for transmitting rotational power generated by an engine and a motor to a rotary cutter provided on a front end of a lever, and the lawn mower is mounted on a frame having wheels and a handlebar. The operator pushes the handle on foot, moves the mower along the ground, and performs the required mowing work.
  • a power source 2 such as an engine or a motor is provided, and the driving member inserted in the driving tube 3 rotates to transmit power to the front end portion of the driving tube 3.
  • the upper frame of the frame 1 has wheels that are free to rotate relative to the frame. 6, 7 is a handle portion that forms part of the frame.
  • the rotational power of the engine is transmitted to the nylon cord holding member 4, and the nylon cord holding member 4 is rotated about the rotation axis X-X.
  • the nylon cord cutting blade 5 is radially extended from the outer wall of the nylon cord holding member 4, and the weeds are cut by the distal end portion of the nylon cord cutting tool 5.
  • the nylon cord holding member 4 is provided with a grounding member mounting shaft 8, the inner ring of the bearing 9 is fitted, and is fastened by the spacer 11 and the bolt 12, and the inner ring of the bearing 9 and the nylon cord holding member 4 are integrally rotated.
  • a grounding member mounting member 13 is fitted to the outer ring of the bearing 9, and the grounding member mounting member 13 and the grounding member 14 are fixed by bolts 14. Therefore, the grounding member 14 is relatively rotatable relative to the nylon cord holding member 4 around the rotation axis X-X.
  • the operator uses the wheel 6 as a fulcrum to move the handle portion 7 up and down, and the lower portion of the grounding member 14 is grounded, and the handle portion 7 is pushed by hand, and the mower is moved relative to the ground by the rotation of the wheel 6. Weeding weeds, etc. Further, when the lawn mower is grounded to the grounding member 14 during operation, since the relative rotation function with respect to the nylon cord holding member 4 is maintained, and the nylon cutting tool is held almost at a stationary state, the rotational friction between the ground and the holding member can be avoided. It can prevent small stones from scattering.
  • the portion of the nylon cutting tool 5 that cuts the weeds is limited to the outer side of the largest diameter of the grounding member, and it is possible to prevent the portion of the vicinity of the center of rotation of the nylon cutting tool from coming into contact with weeds to cause entanglement.
  • the outer edge portion of the grounding member 14 is provided with an annular flange 17, and in the embodiment of Fig. 5, the flange 17
  • the top surface provided on the opposite side to the ground contact surface of the guide member has a convex annular structure.
  • the rotational diameter L of the distal end portion of the nylon cord cutting blade 5 is larger than the axial width B of the wheel. Therefore, there will be no surplus when cutting forward.
  • the outer edge shape of the grounding member 14 is not limited to a standard circle centered on the rotation axis X-X.
  • the area on one side of the ground member is larger than the area on the other side with respect to the plane P-P including the rotation axis X-X.
  • the grounding surface of the grounding member is provided with a plurality of sled rods 16 symmetrically with respect to the plane P-P, and the length of the mast is longer with respect to the plane P-P on the side where the area of the grounding member is larger than the area where the area is smaller.
  • the grounding member having different grounding areas and the sled 16 having different lengths when the mower advances, has a resistance in a direction perpendicular to the advancing direction of the grounding member, and one side of the plane PP On the other side, the grounding member can rotate on its own. As shown in Figure 4, the forward direction F, the operator only needs to induce the wheel with a small resistance in the forward direction F.
  • the protruding length of the outer edge of the grounding member of the nylon cord cutting tool is large in the forward direction and small in the rear direction, so that even if there is some lodging of the weeds during the advancement, the cutting can be completed, thereby making the operation Can be carried out efficiently.

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

Abstract

一种步行式割草机，包括支撑用的机架（1），在机架（1）上安装有切断刀具，切断刀具包含以切断刀具安装轴为中心能旋转的保持部材（4），和被保持部材（4）保持的绳状切断刀具（5），保持部材（4）下方设有以安装轴为中心且相对于保持部材（4）能够旋转的接地部材（14），接地部材（14）接地侧设有与行进方向一致的导向部。

Description

一种步行式割草机 技术领域
[0001] 本申请涉及一种割草装置， 具体涉及一种步行式割草机。
背景技术
[0002] 手推式割草机作为除去田间生长的杂草机械， 割草机包括用于产生旋转 动力发动机或电机、操作杆前端上装备的旋转刀具， 割草机搭载在具有车轮以及 手把的机架上， 操作者步行着推着手把， 使割草机沿着地面移动， 进行所需的割 草作业。 图 6和图 7是该种割草机构造的一个例子。 其中， 1是机架， 发动机、 电机等动力源固定在机架 1上。动力源 2上连接的驱动管 3延伸， 驱动管 3的内 部内置有动力源 2产生的动力传达到外部的旋转部材。驱动管 3的前端连接有旋 转刀具保持部材 4,和内置在驱动管 3内的旋转部材，使其能围绕旋转轴 X-X旋 转。作为旋转刀具， 从旋转刀具保持部材 4的中心部分， 尼龙绳切断刀具 5呈放 射状伸出。机架 1上组有能相对于机架能自由旋转的车轮 6和 7为构成机架一部 分的手把部。
[0003] 操作者以车轮 6为支点， 使手把部 7上下移动， 旋转刀具保持部材 4的 下部接地状态， 用手推手把部 7, 通过车轮 6的旋转使割草机相对于地面移动， 进行杂草割除。 例如尼龙绳直径是 2.2〜 3mm的程度， 旋转中心到前端部的距离 是 180mm程度， 旋转速度达到 5000〜 8000rpm,前端部高速旋转， 在切断软质杂 草时具有充足的动能。
[0004] 而现有技术中有以下缺点： 1.尼龙绳切断刀具的切断杂草的部位离旋转中 心近的部位， 尼龙绳的切断速度慢， 会出现缠草现象； 2.旋转中的旋转刀具保持 部材会碰触接地，与地面之间会产生阻力，会损耗能量，妨碍割草机的手推前进; 3.旋转刀具触碰地面， 会有小石头等杂物飞散的危险。
发明内容
[0005] 本申请为了解决上述缺点， 本申请提供一种将旋转刀具与地面分隔， 避 免缠草， 且能够顺利推进的步行式割草机。
[0006] 本申请采用以下技术方案实现： 一种步行式割草机， 包括支撑用的机架， 在上述机架上安装有切断刀具，切断刀具包含以切断刀具安装轴为中心能旋转的 保持部材，和被该保持部材保持的绳状切断刀具， 以及具备以旋转轴为中心相对 于上述保持部材能够旋转的接地部材，并且上述割草机的机架后部安装有构成其 一端的手把部和位于机架下方能自由旋转的车轮，所述保持部材下方设有以安装 轴为中心且相对于保持部材能够旋转的接地部材，所述接地部材接地侧设有与行 进方向一致的导向部。。
[0007] 为实现接地部材直线推进， 降低阻力， 该导向部包括至少一条与行进方 向相同的直线状橇杆。
[0008] 为使接地部材在推进时具有导向性， 所述直线状橇杆相对于通过旋转中 心并且与直线状橇杆的直线方向成直角的平面是非对称的。
[0009] 为进一步提高导向性， 接地部材的面积相对于通过旋转中心并且与行进 方向成直角的平面是非对称的。
[0010] 为使割草覆盖行进的路径， 做到全面切割， 绳状切断刀具前端的旋转直 径 （L） 大于车轮的轴向宽度。
[0011] 为了具有更好的通过性和防护性， 接地部材的外缘部设置有环状的翻边。
[0012] 因此， 在地面侧设有相对于尼龙绳保持部材能自由旋转的接地部材， 操 作时使其接地，使其几乎停止在地面上滑动，减小地面和尼龙绳保持部材间的摩 擦阻力，使割草机的前进更容易的同时， 切割杂草的位置限定在只是尼龙绳的外 周部，来防止缠草。而接地部材的接地面上设有直线状橇杆，手推割草机前进时， 减小接地部材和地面间的摩擦阻力。
[0013] 此外， 通过接地部材， 被赋予了手推割草机前进时， 为了能在前进阻力 降到最小的方向上移动， 直线状橇杆的方向能自行调整的功能。
[0014] 本发明的有益之处在于， 本发明相关的手推式割草机用旋转刀具及使用 该刀具的割草机， 具备使其和地面接触时能保持静止状态的接地部材，通过接地 部材上设有的橇杆， 前进割草时减少尼龙绳保持部材和地面间的摩擦阻力， 且更 容易操作使其朝向希望的方向前进。
附图说明
[0015] 图 1 和本发明相关的手推式割草机用旋转刀具及使用该刀具的割草机重 要部位立体结构示意图；
图 2 和本发明相关的手推式割草机用旋转刀具及使用该刀具的割草机重要部位 侧视结构示意图； 图 3 和本发明相关的手推式割草机用旋转刀具及使用该刀具的割草机重要部位 俯视结构示意图；
图 4和本发明相关的手推式割草机用旋转刀具的平面结构示意图；
图 5 和本发明相关的手推式割草机用旋转刀具的剖面结构示意图；
图 6 现有技术手推式割草机的立体结构示意图；
图 7现有技术手推式割草机的侧视结构示意图。
具体实施方式
[0016] 下面结合附图中最优选的实施例对本发明做进一步的说明。
[0017] 实施例一
如图 1至图 3所示， 具有将发动机、 电机产生的旋转动力传达到操作杆前端上装 备的旋转刀具上的构造的割草机， 割草机搭载在具有车轮以及手把的机架上，操 作者步行着推着手把， 使割草机沿着地面移动， 进行所需的割草作业。 机架 1 的一端组有发动机、 电机等动力源 2, 驱动管 3内插有的驱动部材旋转将动力传 达到驱动管 3的前端部。 机架 1上组有相对于机架能自由旋转的车轮 6、 7是构 成机架一部分的手把部。
[0018] 而在驱动管 3的前端， 发动机的旋转动力被传到尼龙绳保持部材 4上， 尼龙绳保持部材 4围绕旋转轴 X-X旋转。尼龙绳切断刀具 5从尼龙绳保持部材 4 的外壁上呈放射状伸出，通过尼龙绳切断刀具 5的前端部切断杂草。在尼龙绳保 持部材 4装有接地部材安装轴 8， 轴承 9的内圈被嵌合， 并通过垫片 11和螺栓 12被紧固， 轴承 9的内圈和尼龙绳保持部材 4整体旋转。 轴承 9的外圈上嵌合 有接地部材安装件 13 , 接地部材安装件 13与接地部材 14通过螺栓 14固定。 因 此， 接地部材 14围绕旋转轴 X-X相对于尼龙绳保持部材 4能够相对旋转。
[0019] 操作者以车轮 6为支点， 使手把部 7上下移动， 使接地部材 14的下部处 于接地状态， 用手推手把部 7, 通过车轮 6的旋转使割草机相对于地面移动， 进 行杂草等的割除。 而且割草机在操作时使接地部材 14接地的话， 由于相对于尼 龙绳保持部材 4能相对旋转功能，以及使之相对尼龙绳切断刀具保持几乎静止状 态， 能避免地面和保持部材间的旋转摩擦， 能够防止小石块等飞散。而且尼龙绳 切断刀具 5的割除杂草的部位限定在接地部材最大直径的外侧，能够防止尼龙绳 切断刀具的旋转中心近的部位接触杂草引起缠草的现象。 [0020] 实施例二
为了减小割草机前进、割草时杂草和接地部材间的阻力， 防止杂草倒伏， 接地部 材 14的外缘部设置有环状的翻边 17， 图 5的实施例中翻边 17被设置成相对导 向部材接地面相反侧的顶面呈凸起的环状结构。
[0021] 如图 3所示，尼龙绳切断刀具 5的前端部的旋转直径 L， 比车轮的轴向宽 度 B大。 因此， 前进割草时割除不会有剩余。
[0022] 实施例三
本实施例中，接地部材 14的外缘形状并不限定于以旋转轴 X-X为中心的标准圆。 例如在图 4的实施例中， 相对于包含旋转轴 X-X的平面 P-P， 接地部材一侧的面 积比另一侧的面积大。 接地部材的接地面上相对于平面 P-P 对称设有多个橇杆 16， 而撬杆的长度相对于平面 P-P， 在接地部材的面积大的一侧， 比起面积小的 一侧要长。通过橇杆 16的设置， 割草机前进时， 接地盘和地面的接触面积边小， 前进阻力变小。
[0023] 此外， 相对于平面 P-P， 通过接地面积不同的接地部材和长度不同的橇杆 16, 割草机前进时， 相对于接地部材的前进方向呈直角方向的阻力， 平面 P-P的 一侧和另一侧不同， 使得接地部材能自行旋转。 如图 4所示前进方向 F， 操作者 只需要在前进方向 F上以很小的阻力给车轮以诱导。
[0024] 如图 4所示， 尼龙绳切断刀具的接地部材外缘的伸出长度在前进方向大， 在后部方向小， 所以前进时杂草即使有一些倒伏， 也能够完成割除， 使得作业能 有效率的进行。

Claims

权利要求书
[权利要求 1] 一种步行式割草机， 包括支撑用的机架 （i） ， 所述机架上安装有切 断刀具， 所述切断刀具包含以切断刀具的安装轴为中心能旋转的保持 部材 （4） 和被该保持部材保持的绳状切断刀具 （5） ， 机架安装有构 成其一端的手把部和能自由旋转的车轮， 其特征在于， 所述保持部材 下方设有以安装轴为中心且相对于保持部材能够旋转的接地部材 （14 ） ， 所述接地部材接地侧设有与行进方向一致的导向部。
[权利要求 2] 根据权利要求 1所述的步行式割草机， 其特征在于： 所述导向部包括 至少一条与行进方向相同的直线状橇杆 （16） 。
[权利要求 3] 根据权利要求 2所述的步行式割草机， 其特征在于： 所述直线状橇杆 相对于通过旋转中心（X-X） 并且与直线状橇杆的直线方向成直角的 平面 （P-P） 是非对称的。
[权利要求 4] 根据权利要求 1至 3任一所述的步行式割草机， 其特征在于： 所述接地 部材的面积相对于通过旋转中心（X-X） 并且与行进方向成直角的平 面 （P-P） 是非对称的。
[权利要求 5] 根据权利要求 4所述的步行式割草机， 其特征在于： 所述绳状切断刀 具前端的旋转直径 （L） 大于车轮的轴向宽度 （B） 。
[权利要求 6] 根据权利要求 4所述的步行式割草机， 其特征在于： 所述接地部材 （1
4） 的外缘部设置有环状的翻边 （17） 。
PCT/CN2018/096601 2018-02-06 2018-08-17 一种步行式割草机 WO2019153657A1 (zh)

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