WO2018059323A1 - 割草机及其刀片 - Google Patents

割草机及其刀片 Download PDF

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Publication number
WO2018059323A1
WO2018059323A1 PCT/CN2017/102949 CN2017102949W WO2018059323A1 WO 2018059323 A1 WO2018059323 A1 WO 2018059323A1 CN 2017102949 W CN2017102949 W CN 2017102949W WO 2018059323 A1 WO2018059323 A1 WO 2018059323A1
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WO
WIPO (PCT)
Prior art keywords
blade
cutting
cutting portion
lawn mower
thickness
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PCT/CN2017/102949
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English (en)
French (fr)
Inventor
焦石平
Original Assignee
苏州宝时得电动工具有限公司
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=58762479&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2018059323(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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 CN201780008819.4A priority Critical patent/CN109819646A/zh
Publication of WO2018059323A1 publication Critical patent/WO2018059323A1/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
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • 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
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus

Definitions

  • the present invention relates to a lawn mower and its blades, particularly a high speed cutting lawn mower and its blades.
  • Power tools typically include a blade mounted on a drive shaft, and the drive shaft drives the blade to rotate for cutting.
  • the blades to be mounted are subjected to a sharpening process, causing the blade portion to be too thin and aging to cause cracking, and the stress concentration of the blade portion is subjected to a large force and is easily damaged, so that it is used.
  • the short life span requires frequent replacement of the blade, which increases the user's purchase cost and causes great inconvenience to the user.
  • a blade for a lawn mower the blade including a cutting portion for cutting and a blade body connected to the cutting portion, the cutting portion being located at One side or opposite sides of the blade body, the edge of the cutting portion has no cutting edge.
  • the blade linear velocity ranges from 13.6 m/s to 51 m/s.
  • the blade linear velocity ranges from 19 m/s to 27 m/s.
  • the thickness of the cutting portion ranges from 0.2 mm to 1.2 mm.
  • the thickness of the cutting portion ranges from 0.3 mm to 0.6 mm.
  • the length of the cutting portion is not less than 0.3 mm.
  • the length of the cutting portion ranges from not less than 0.5 mm.
  • the blade body has a thickness ranging from 0.2 mm to 2 mm.
  • the thickness of the cutting portion is the same as the thickness of the blade body.
  • the cutting portion and the blade body have a thickness ranging from 0.2 mm to 1.2 mm.
  • the cutting portion and the blade body have a thickness ranging from 0.3 mm to 0.6 mm.
  • the cutting portion includes a cutting end surface for cutting and a connecting end surface connecting the cutting end surface and the blade body, and the blade body includes a side surface perpendicular to the cutting end surface.
  • the connecting end face extends smoothly.
  • the connecting end face is parallel to the side of the blade body.
  • the connecting end surface is formed to extend directly along a plane in which the side surface of the blade body is located.
  • the blade is rectangular.
  • the blade has a thickness of 0.3 mm.
  • the material of the blade is cemented carbide or stainless steel.
  • the blade body is provided with a mounting hole.
  • a lawn mower includes the blade as described above.
  • the lawn mower comprises a driving motor and a driving shaft connected to the driving motor, and the blade rotates under the driving of the driving shaft, and the driving motor has a rotation speed ranging from 2000 rpm to 7500 rpm.
  • the rotational speed of the drive motor ranges from 2800 rpm to 4000 rpm.
  • the lawn mower is a smart lawn mower, the smart lawn mower comprising a casing, a walking system, a cutting system, a detecting system and a control system, the cutting system comprising the cutter head and being fixed to the The blade on the cutter head.
  • the blade body is provided with a mounting hole
  • the lawn mower is further provided with a fixing member, and the fixing member fixes the blade to the cutter head through the mounting hole.
  • the lawn mower has at least two of the blades, and the blades are disposed on the cutter head.
  • the invention has the beneficial effects that by setting the edge of the blade cutting portion as a bladeless edge, the stress concentration is avoided, and the cutting portion is locally damaged by a large force, which is easy to be damaged, thereby improving the life of the blade.
  • Figure 1 is a front elevational view of a blade in accordance with a first embodiment of the present invention
  • Figure 2 is a cross-sectional view of the blade shown in Figure 1.
  • Figure 3 is a cross-sectional view of a blade in accordance with a second embodiment of the present invention.
  • Figure 4 is a cross-sectional view of a blade in accordance with a third embodiment of the present invention.
  • the length described in the present invention is a length in the longitudinal direction, wherein the longitudinal direction is the up-and-down direction in FIGS. 1 to 4; the thickness is the thickness in the thickness direction, wherein the thickness direction refers to the left-right direction in FIGS. 2 to 4. .
  • a blade 100 mounted on a lawn mower includes a cutting portion 40 for cutting and a blade body 20 connected to the cutting portion 40, the cutting portion 40 being located at the blade body
  • the edge of the cutting portion 40 has no edge, and the edge refers to the portion along the edge.
  • the edge of the cutting portion 40 refers to the cutting portion 40 away from the blade body 20. The outermost side. Since the edge of the cutting portion 40 is not subjected to the sharpening process, it is not easy to be aged and the edge is cracked, and has a long service life. The long-term use does not need to worry about the aging of the cutting portion 40, and the user does not need to frequently change the blade, thereby reducing the use cost. .
  • the thickness of the edge of the cutting portion 40 of the blade 100 is increased as compared with the blade thickness of the blade, and in the case where the blade linear velocity is the same, The thickness of the edge of the cutting portion 40 is increased, resulting in deterioration of the cutting quality.
  • the blade 100 performs the cutting task, when the thickness of the blade 100 is constant, the wire speed is larger within a certain range, and the cutting effect is better. Therefore, the lifting line speed can improve the cutting quality of the blade 100.
  • the overall thickness of the cutting portion 40 of the blade 100 is limited to a certain extent so that the linear velocity of the blade 100 reaches a suitable range. , the cutting quality of the blade 100 can be satisfied.
  • the linear velocity of the blade is constant, the thinner the thickness of the blade 100 is, the better the cutting effect is in a certain range.
  • the thickness of the blade 100 is too thin, and when it is rotated at a high speed, a rigid object may be easily broken or even splashed and wounded.
  • the optimum cutting effect is achieved by defining the linear velocity range of the blade 100, the cutting portion 40 of the blade 100, and the thickness range of the blade body 20.
  • the linear velocity of the blade 100 during rotational cutting ranges from 13.6 m/s to 51 m/s
  • the thickness of the cutting portion 40 of the blade 100 ranges from 0.2 mm to 1.2 mm
  • the thickness of the blade body 20 ranges from 0.2 mm to 2 mm.
  • the linear velocity of the blade 100 ranges from 19 m/s to 27 m/s
  • the thickness of the cut portion 40 of the blade 100 ranges from 0.3 to 0.6 mm to achieve a better cutting effect.
  • the material of the blade 100 is made of cemented carbide or stainless steel, so that the blade 100 can cut the workpiece while having sufficient strength to avoid reducing the lawn mower to which the blade 100 is mounted. Work efficiency.
  • the material of the blade 100 can also be other metallic materials or non-metallic materials.
  • the edge of the cutting portion 40 since the edge of the cutting portion 40 is not subjected to the sharpening process, the edge is not easily aged and the edge is cracked, and the blade has a long service life.
  • the long-term use does not require the problem of aging of the cutting portion 40, and the user does not need to frequently change the blade. Reduced the cost of use.
  • the thickness of the cutting portion 40 of the blade 100 and the thickness of the blade body 20 are respectively controlled within a certain range, and the linear velocity of the blade 100 is also controlled within a certain range to ensure control of energy consumption, control of cost, and control of kinetic energy to avoid the risk of accidental injury. Under the premise, achieve a good cutting effect.
  • the thickness of the cutting portion 40 of the blade 100 ranges from 0.2 mm to ⁇ 1.2 mm, preferably, the thickness of the cutting portion 40 of the blade 100 ranges from 0.3 to 0.6 mm, and the length of the cutting portion 40 of the blade 100 is not less than 0.3 mm, preferably not less than 0.5 mm, so that when the edge of the cutting portion 40 is worn, The remaining portion of the cutting portion 40 can still perform the cutting task, and the length of the cutting portion 40 of the blade 100 is not less than 0.3 mm, which means that the length of the cutting portion 40 in the longitudinal direction is not less than 0.3 mm, and the length direction refers to FIG. Up to the up and down direction shown in Figure 4.
  • the length of the cutting portion 40 of the blade 100 is 0.5 mm
  • the thickness of the cutting portion 40 is in the range of 0.3 to 0.6 mm
  • the cutting portion 40 of the blade 100 is worn from the edge inwardly within 0.1 mm, the cutting portion 40 remaining 0.4 mm, the remaining cutting portion 40 is still in the range of 0.3 to 0.6 mm, and the cutting task can still be performed.
  • the blade 100 since the length of the cutting portion 40 is not less than 0.3 mm, when the cutting portion 40 is partially worn, the blade 100 can still perform the cutting task, increasing the service life of the blade, and the user does not need to frequently change the blade, thereby reducing the use cost.
  • the edge of the cutting edge refers to the edge of the cutting edge
  • the effective life of the blade refers to the service life of ensuring that the cutting quality of the blade is not lowered; and in the present invention, the edge of the cutting portion 40 is designed as a bladeless portion, and the cutting portion
  • the length of 40 is not less than 0.3 mm, preferably not less than 0.5 mm.
  • the edge of the cutting portion 40 of the blade 100 has no edge, the stress concentration is small, the edge of the cutting portion 40 is less likely to be worn, and the edge of the cutting portion 40 is worn.
  • the time is much longer than the time when the edge of the blade of the conventional blade is worn.
  • the effective life of the blade is the time when the entire length of the cutting portion 40 is completely worn, and the effective life of the blade is much longer than that of the ordinary blade.
  • the blade body 20 has the same thickness as the cutting portion 40, and the blade 100 has no blade at its entirety.
  • the thickness of the blade body 20 and the cutting portion 40 ranges from 0.2 mm to 1.2 mm.
  • the thickness of the cutting portion 40 of the blade 100 ranges from 0.3 to 0.6 mm.
  • the blade 100 has an overall thickness of 0.3 mm, i.e., the thickness of the blade body 20 and the cutting portion 40 are both 0.3 mm.
  • the thickness of the cutting portion 40 is the same as the thickness of the blade main body 20, it is also considered that the blade main body 20 is also the cutting portion 40, that is, the blade 100 includes only the cutting portion 40.
  • the entire blade body 20 and the cutting portion 40 are The sum of the lengths of the sections is the effective cutting length, and the effective life of the blade 100 is the time during which the entire length of the blade 100 is worn.
  • the effective life of the conventional blade 100 is the time when the edge of the blade is worn. After the edge of the blade is worn, the cutting quality is seriously degraded. Even if the user does not consider the cutting quality, the blade is not replaced, and the blade is the latest.
  • the life of the blade is completely terminated and there is no cutting ability.
  • the blade 100 has no blade edge as a whole, and does not need to undergo a sharpening process, so that the blade is not easily aged and the blade is cracked.
  • the cutting quality is uniform within the entire length of the blade 100, and even if the edge of the blade 100 is continuously Wear, the cutting ability of the blade 100 is also maintained until the length of the entire blade 100 is worn out, and the life of the blade 100 is terminated.
  • the life of the blade 100 is tens of times or more than that of a conventional bladed blade, and in the present embodiment, the cutting quality of the blade 100 is always uniform, and the cutting quality of the conventional bladed blade is always degraded.
  • the blade 100 has a rectangular shape, and the blade 100 is provided with a plurality of (including one) mounting holes 22 for fixing the blade 100 to the lawn mower, specifically, in this embodiment.
  • the length of the blade 100 is 36 mm and the width is 18 mm.
  • the cutting portion 40 is located on the long side of the blade 100, the mounting holes 22 are two, and the two mounting holes 22 are spaced apart.
  • the diameter of the mounting hole 22 is 7 mm, and two The mounting holes 22 are spaced apart by 14 mm.
  • the blade 100 may have other shapes, and the shape of the mounting hole 22 is not limited thereto, and may be other numbers, for example, only one mounting hole 22 is provided.
  • the blade 100 has no blade edge as a whole, and the portion of the blade 100 except the mounting hole is the cutting portion 40.
  • the blade 100 does not need to undergo a sharpening process, so that the blade is not easily aged and the blade is cracked. For long-term use, there is no need to worry about the aging of the cutting portion 40.
  • the cutting quality is consistent throughout the use of the blade 100, has a long service life and maintains a high cutting quality, and the user does not need to frequently change the blade, thereby reducing the cost of use.
  • the thickness of the blade body 20 and the cutting portion 40 may also be different. Specifically, as shown in FIGS. 3 and 4, the second embodiment and the third embodiment of the present invention, the thickness of the edge of the blade body 20 is greater than The thickness of the edge of the cutting portion 40, the thickness of the cutting portion 40 of the blade 100 is in the range of 0.2 mm to 1.2 mm, and the thickness of the blade body 20 is in the range of 0.2 mm to 2 mm. Preferably, the thickness of the cutting portion 40 of the blade 100 is 0.3. ⁇ 0.6mm to achieve a good cutting effect.
  • the cutting portion 40 includes a cutting end surface 401 that is away from the blade body 20 and is used for cutting, and connects the cutting end surface 401 and the connecting end surface 402 of the blade body 20, and the connecting end surface 402 extends smoothly to avoid stress concentration.
  • the cutting portion 40 is locally subjected to a large force and is easily damaged.
  • the blade body 20 includes a side surface 202 that is perpendicular to the cutting end face 401.
  • the connecting end face 402 is parallel to the side face 202 of the blade body 20.
  • a chamfer is provided at the junction of the connecting end face 402 and the blade body 20. Excessive smoothing.
  • the attachment end face 402 extends linearly from the edge of the side 202 of the blade body 20 to the cutting end face 401; in other embodiments, the attachment end face 402 may also be from the side 202 of the blade body 20.
  • the edge extends smoothly along the curve to the cutting end face 401.
  • the connecting end face 402 can also be formed to extend directly along the plane of the side surface 202 of the blade body 20, as described in the second embodiment and the third embodiment.
  • the blade 100 does not require sharpening, it has sufficient strength and good anti-aging property while ensuring cutting efficiency, so that it is not necessary to worry about the aging of the cutting portion 40 in long-term use, and has a long service life. And the production process is reduced, and the production efficiency of the blade 100 is improved.
  • the present invention also provides a lawn mower comprising a cutter head and a blade 100 of the above embodiment fixed to the cutter head.
  • the blade body 20 is provided with a mounting hole 22, and the lawn mower is provided with a fixing member, and the fixing member is worn.
  • a mounting hole 22 is provided to secure the blade 100 to the cutter head.
  • the lawn mower of the present invention achieves mowing performance through the blade 100, and ensures mowing ability. After the blade 100 of the present invention adopts the above-mentioned blade 100, since the edge of the cutting portion 40 of the blade 100 has no edge, the service life of the blade 100 can be prolonged, the number of times the user frequently replaces the blade 100 is reduced, the accessory cost is reduced, and the user is convenient to use.
  • the specific shape and number of the blades may be determined according to actual conditions, and the number of blades may be several (including one), preferably at least two, and at least two blades are disposed on the cutter head.
  • the cutter head can be rotated, so that the other blades 100 on the cutter head cut the vegetation, so that the use time of the blade 100 is long, reducing the number of times the blade 100 is replaced, and reducing the number of times Attachment cost.
  • the lawn mower is a smart lawn mower for automatic walking and mowing on the ground, including a housing, a walking system, a cutting system, a detection system, and a control system.
  • the walking system includes a travel motor and wheels that are driven by a travel motor.
  • the cutting system includes a cutting motor, a drive shaft coupled to the cutting motor, and a cutting device coupled to the drive shaft.
  • the detection system is used to detect the position of the intelligent mower.
  • the control system is used to control the operation of the walking system, cutting system and detection system.
  • Cutting The blade 100 in the above embodiment including the cutter head and fixed to the cutter head is disposed.
  • the blade body 110 is provided with a mounting hole 22, and the smart lawn mower is provided with a fixing member, and the fixing member passes through the mounting hole 22 to fix the blade 100 to the cutter head.
  • the specific shape and number of the blades may be determined according to actual conditions.
  • the number of blades may be several (including one), preferably at least two, at least two blades are disposed on the cutter head, and two of the blades 100 are cut. After the portion 40 is worn, the cutter head can be rotated so that the other blades 100 on the cutter head cut the vegetation, making the blade 100 use for a long time.
  • the detection system may not detect or detect the delay or judge the error, resulting in an increase in the probability of the blade 100 colliding with the obstacle while working.
  • the blade is easily damaged.
  • the lawn mower can also be a hand-held lawn mower or a multi-function machine with a mowing function or the like.
  • the lawn mower includes a driving motor and a driving shaft connected to the driving motor, and the cutter disk is mounted on the driving shaft to rotate under the driving of the driving shaft, thereby driving the blade 100 to rotate.
  • the driving motor speed is too small, the kinetic energy is not enough, resulting in poor mowing quality or mowing, the driving motor speed can not be too large, the rotating speed is too large, the kinetic energy is too large, and the safety requirements are not met.
  • the rotational speed of the driving motor ranges from 2000 rpm to 7500 rpm.
  • the rotational speed of the driving motor ranges from 2800 rpm to 4000 rpm, so that the blade 100 can be driven at a high speed. Rotating to cut the workpiece is to ensure a certain cutting efficiency while ensuring the service life of the blade 100.
  • the above mower is equipped with the blade 100 to cut the workpiece, and the blade is frequently replaced without damage due to blade damage while ensuring a certain cutting efficiency, thereby facilitating the user and reducing the mower.
  • the cost is the cost.

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Abstract

一种用于割草机上的刀片，刀片（100）包括用于切割的切割（40）部及与切割部（40）相连接的刀片主体（20），切割部（40）位于刀片主体（20）的一侧或相对的两侧，切割部（40）的边缘无刃口。

Description

割草机及其刀片 技术领域
本发明涉及一种割草机及其刀片，尤其是高速切割的割草机及其刀片。
背景技术
随着科技水平的提高与社会的发展，越来越多的动力工具走进了人们的生活，代替人们完成了许多工作，从而减轻了人们的负担，为人们带来了极大便利。动力工具通常包括安装于驱动轴上的刀片，而通过驱动轴带动刀片旋转进行切割工作。
但目前，例如割草机等动力工具，其安装的刀片均经过磨刃工序，造成刀刃部分过薄而容易老化导致崩裂，且刀刃部应力集中使其受到较大作用力而容易损坏，因此使用寿命较短，需要频繁更换刀片而增加了使用者的购买成本，并为使用者带来了极大不便。
发明内容
为克服上述缺陷，本发明采用如下技术方案：一种用于割草机上的刀片，所述刀片包括用于切割的切割部及与所述切割部相连接的刀片主体，所述切割部位于所述刀片主体的一侧或相对的两侧，所述切割部的边缘无刃口。
优选的，所述刀片线速度范围为13.6m/s～51m/s。
优选的，所述刀片线速度范围为19m/s～27m/s。
优选的，所述切割部的厚度范围为0.2mm～1.2mm。
优选的，所述切割部的厚度范围为0.3mm～0.6mm。
优选的，所述切割部的长度范围不小于0.3mm。
优选的，所述切割部的长度范围不小于0.5mm。
优选的，所述刀片主体的厚度范围为0.2mm～2mm。
优选的，所述切割部的厚度与所述刀片主体的厚度相同。
优选的，所述切割部及所述刀片主体的厚度范围均为0.2mm～1.2mm。
优选的，所述切割部及所述刀片主体的厚度范围均为0.3mm～0.6mm。
优选的，所述切割部包括用于切割的切割端面及连接所述切割端面与所述刀片主体的连接端面，所述刀片主体包括与所述切割端面相垂直的侧面。
优选的，所述连接端面平滑延伸。
优选的，所述连接端面平行于所述刀片主体的侧面。
优选的，所述连接端面沿所述刀片主体的侧面所在的平面直接延伸形成。
优选的，所述刀片呈矩形。
优选的，所述刀片的厚度为0.3mm。
优选的，所述刀片的材料为硬质合金或不锈钢。
优选的，所述刀片主体开设有安装孔。
本发明还可采用如下技术方案：一种割草机包括如上所述的刀片。
优选的，所述割草机包括驱动电机及连接所述驱动电机的驱动轴，所述刀片在所述驱动轴的带动下转动，所述驱动电机的转速范围为2000rpm～7500rpm。
优选的，所述驱动电机的转速范围为2800rpm～4000rpm。
优选的，所述割草机为智能割草机，所述智能割草机包括外壳、行走系统、切割系统、侦测系统及控制系统，所述切割系统包括所述刀盘及固定于所述刀盘上的所述刀片。
优选的，所述刀片主体上设置有安装孔，所述割草机还设有固定件，所述固定件穿过所述安装孔将所述刀片固定于所述刀盘上。
优选的，所述割草机至少具有两个所述刀片，所述刀片围设于所述刀盘上。
本发明的有益效果是：通过将刀片切割部的边缘设置为无刃口，避免应力集中而使切割部局部受较大的作用力而容易损坏，提升刀片寿命。
附图说明
图1为本发明第一实施例的刀片的正视图；
图2为图1所示的刀片的剖视图。
图3为本发明第二实施例的刀片的剖视图。
图4为本发明第三实施例的刀片的剖视图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。 附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“安装于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的。本发明中所述的长度为长度方向上的长度，其中长度方向为图1至图4中的上下方向；厚度为厚度方向上的厚度，其中厚度方向是指图2至图4中的左右方向。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1至图4所示，一种安装于割草机上的刀片100，刀片100包括用于切割的切割部40及与所述切割部40相连接的刀片主体20，切割部40位于刀片主体20的一侧或相对的两侧，切割部40的边缘无刃口，边缘是指沿边的部分，例如，图1及图2中，切割部40的边缘是指切割部40远离刀片主体20的最外侧。由于切割部40的边缘未经过磨刃工序，从而不易老化而刃口崩裂，具有较长的使用寿命，长期使用无需担心切割部40老化的问题，使用者无需频繁更换刀片，从而降低了使用成本。
如图1至图4所示，由于刀片100的切割部40的边缘无刃口，导致切割部40的边缘厚度相较于有刃口的刀片厚度增加，在刀片线速度相同的情况下，由于切割部40的边缘厚度增加，导致切割质量变差。刀片100在执行切割任务时，当刀片100的厚度不变的情况下，在一定范围内，线速度越大，切割效果越好，因此，提升线速度可以提升刀片100的切割质量。但是刀片100在割草机上工作时，甚至在智能割草机上工作时，若要提升线速度，一 方面需要提升电流，提升能耗，提高电池包的容量，增加成本；另一方面，割草机在工作时，能耗太大，会增加操作失控时伤人或伤物的风险，尤其是智能割草机，处于无人看管的工作环境，若动能太大又无人看管，万一操作失控，极易造成误伤人或误伤物，或者工作中遇到障碍物，由于动能太大，将障碍物弹起，飞溅伤人或伤物等等。综合上述几种情况，本发明中，通过将刀片100的切割部40的边缘无刃口，但刀片100的切割部40的整体厚度做一定的限制，以使刀片100的线速度达到合适的范围，即可满足刀片100的切割质量。当刀片的线速度不变的情况下，在一定范围内，刀片100的厚度越薄，其切割效果越好。然而，刀片100厚度太薄，高速旋转时，遇到刚性物体会容易断裂，甚至飞溅伤人。本发明中，通过限定刀片100的线速度范围，刀片100的切割部40及刀片主体20的厚度范围，以实现最佳的切割效果。具体的，刀片100旋转切割时的线速度范围为13.6m/s～51m/s，刀片100的切割部40的厚度范围为0.2mm～1.2mm，刀片主体20的厚度范围为0.2mm～2mm，以实现较好的切割效果。在上述范围内，优选的，刀片100的线速度范围为19m/s～27m/s，刀片100的切割部40的厚度范围为0.3～0.6mm，以实现更佳的切割效果。在一具体实施例中，刀片100厚度为0.3mm时，刀片线速度为51m/s，刀片100的动能达到1.8J，刀片100动能不超过2J，运用到智能割草机上，还在安全范围之内。在另一具体实施例中，刀片100的材料为硬质合金或不锈钢，如此，该刀片100在具有足够强度的情况下可对被加工件进行切割，避免降低安装有该刀片100的割草机的工作效率。在其他实施例中，刀片100的材料也可为其他金属材料或非金属材料。上述刀片100，由于切割部40的边缘未经过磨刃工序，从而不易老化而刃口崩裂，具有较长的使用寿命，长期使用无需担心切割部40老化的问题，使用者无需频繁更换刀片，从而降低了使用成本。而且，刀片100的切割部40的厚度及刀片主体20的厚度分别控制在一定范围内，刀片100的线速度也控制在一定范围，以保证在控制能耗、控制成本、控制动能以避免误伤风险的前提下，实现良好的切割效果。
在另一具体实施例中，刀片100的切割部40的厚度范围为0.2mm～ 1.2mm，优选的，刀片100的切割部40的厚度范围为0.3～0.6mm，刀片100的切割部40的长度不小于0.3mm，优选不小于0.5mm，以便当切割部40边缘被磨损后，所述切割部40剩下的部分依旧可以执行切割任务，刀片100的切割部40的长度不小于0.3mm，是指切割部40在长度方向上的长度不小于0.3mm，长度方向是指图2至图4所示的上下方向。例如，刀片100的切割部40的长度为0.5mm，所述切割部40的厚度均在0.3～0.6mm范围内，当刀片100的切割部40自边缘向内0.1mm范围均被磨损，切割部40剩下的0.4mm，剩下的切割部40的厚度依旧在0.3～0.6mm范围内，依旧可以执行切割任务。上述刀片100，由于切割部40的长度不小于0.3mm，当切割部40局部被磨损后，刀片100依旧可以执行切割任务，增加刀片使用寿命，使用者无需频繁更换刀片，从而降低了使用成本。普通的有刃口刀片，在刀片刃口边缘被磨损之后，刀片切割质量严重下降，在保证切割质量的条件下，刀片的寿命即已经终止，刀片的有效寿命为刃口边缘被磨损的时间，上述刃口边缘是指刃口的最边缘处，刀片的有效寿命是指保证刀片切割质量不下降的使用寿命；而本发明中，通过将切割部40的边缘设计为无刃口，且切割部40的长度不小于0.3mm，优选不小于0.5mm，一方面，刀片100的切割部40边缘无刃口，应力集中小，切割部40的边缘更不容易被磨损，切割部40的边缘被磨损的时间远长于普通有刃口的刀片的刃口边缘被磨损的时间，另一方面，刀片的有效寿命为切割部40的整体长度完全被磨损的时间，刀片的有效寿命远长于普通有刃口刀片的有效寿命，且随着切割部40的长度的增大，刀片的有效寿命甚至可以为普通有刃口刀片的数倍甚至数十倍。
如图1及图2所示，为本发明第一实施例，刀片主体20与切割部40的厚度相同，刀片100整体无刃口。具体的，刀片主体20与切割部40的厚度范围为0.2mm～1.2mm，优选的，刀片100的切割部40的厚度范围为0.3～0.6mm。在一具体实施例中，刀片100整体厚度为0.3mm，即刀片主体20与切割部40的厚度均为0.3mm。在本实施例中，由于切割部40的厚度与刀片主体20的厚度相同，也可以认为刀片主体20也为切割部40，即刀片100仅包括切割部40。如图2所示，在本实施例中，刀片主体20与切割部40的全 部长度的总和均为有效的切割长度，刀片100的有效寿命为刀片100全部长度被磨损的时间。而普通的有刃口的刀片100的有效寿命为刃口边缘被磨损的时间，刃口边缘被磨损之后，切割质量会严重下降，即使此时用户不考虑切割质量不更换刀片，最迟到刃口完全被磨损之后，刀片的寿命也就完全终止了，再无切割能力。而本实施例中，刀片100整体无刃口，无需经过磨刃工序，从而不易老化而刃口崩裂，而且，刀片100的整体长度内，切割质量都是一致的，而且即使刀片100的边缘不断磨损，刀片100的切割能力也一直保持，直到整个刀片100的长度都被磨损完，刀片100的寿命才会终止。刀片100的寿命为普通有刃口刀片的数十倍甚至更多，而且本实施例中，刀片100的切割质量一直保持一致，而普通有刃口刀片的切割质量一直在下降。
在图1至图2所示的第一实施例中，刀片100呈矩形，刀片100上设有若干(包括一个)安装孔22以便将刀片100固定于割草机上，具体地，在本实施例中，该刀片100的长度为36mm，宽度为18mm，切割部40位于刀片100的长边，安装孔22为两个，且两个安装孔22间隔设置，安装孔22的直径为7mm，且两个安装孔22之间间隔14mm。在其他实施例中，刀片100也可为其他形状，安装孔22的形状不限于此，也可为其他数量，例如仅设置一个安装孔22。上述刀片100，整体无刃口，刀片100除安装孔外的部分均为切割部40，刀片100无需经过磨刃工序，从而不易老化而刃口崩裂，长期使用无需担心切割部40老化的问题，而且刀片100使用过程中，切割质量一直保持一致，具有较长的使用寿命且一直维持较高的切割质量，使用者无需频繁更换刀片，从而降低了使用成本。
在其他实施例中，刀片主体20与切割部40的厚度也可以不相同，具体如图3及图4所示的本发明第二实施例及第三实施例，刀片主体20的边缘的厚度大于切割部40的边缘的厚度，刀片100的切割部40的厚度范围为0.2mm～1.2mm，刀片主体20的厚度范围为0.2mm～2mm，优选的，刀片100的切割部40的厚度范围为0.3～0.6mm，以实现良好的切割效果。切割部40包括远离刀片主体20且用于切割的切割端面401，连接切割端面401与刀片主体20的连接端面402，连接端面402平滑延伸，从而避免产生应力集中而 使切割部40局部受到较大作用力而容易损坏。刀片主体20包括与切割端面401相垂直的侧面202。在图3所示的第二实施例中，连接端面402平行于刀片主体20的侧面202，在第二实施例中，优选的，在连接端面402与刀片主体20的连接处设置倒角使其过度平滑。在图4所示的第三实施例中，连接端面402自刀片主体20的侧面202的边缘沿直线延伸至切割端面401；在其他实施例中，连接端面402也可以自刀片主体20的侧面202的边缘沿曲线平滑延伸至切割端面401。在图2所示的第一实施例中，也可比照第二实施例与第三实施例的描述，连接端面402沿所述刀片主体20的侧面202所在平面直接延伸形成。
上述刀片100，由于无需磨刃，在保证切割效率的同时具有足够的强度及良好的抗老化性能，因此在长期使用中无需担心切割部40老化的问题，具有较长的使用寿命。并且减少了生产程序，提高了该刀片100的生产效率。
本发明还提供了一种割草机，包括刀盘及固定于刀盘上的上述实施例中的刀片100，刀片主体20上设置有安装孔22，割草机上设有固定件，固定件穿设安装孔22将刀片100固定于刀盘上。本发明的割草机通过刀片100实现割草性能，保证割草能力。本发明的割草机采用上述的刀片100后，由于刀片100的切割部40边缘无刃口，能够延长刀片100的使用寿命，减少用户频繁更换刀片100的次数，降低附件成本，便于用户使用。进一步地，刀片的具体形状及数量可依实际情况而定，刀片的数量可以为若干个(包括一个)，优选至少两个，至少两个刀片围设于刀盘上。这样，当其中一个刀片100的两个切割部40磨损后，可以旋转刀盘，使得刀盘上的其他刀片100对植被进行切割，使得刀片100的使用时间长，减少更换刀片100的次数，降低附件成本。
在一具体实施例中，割草机为智能割草机，用于地面上的自动行走和割草，其包括外壳、行走系统、切割系统、侦测系统及控制系统。行走系统包括行走马达和由行走马达驱动的轮子。切割系统包括切割马达、与切割马达连接的传动轴和与传动轴配接的切割装置。侦测系统用于侦测智能割草机的位置。控制系统用于控制行走系统、切割系统和侦测系统工作。其中切割装 置包括刀盘及固定于刀盘上的上述实施例中的刀片100。刀片主体110上设置有安装孔22，智能割草机设有固定件，固定件穿设安装孔22将刀片100固定于刀盘上。刀片的具体形状及数量可依实际情况而定，刀片的数量可以为若干个(包括一个)，优选至少两个，至少两个刀片围设于刀盘上，当其中一个刀片100的两个切割部40磨损后，可以旋转刀盘，使得刀盘上的其他刀片100对植被进行切割，使得刀片100的使用时间长。因智能割草机在草地上自动行走并割草，遇到障碍物时，侦测系统可能没有侦测到或者侦测迟缓或者判断错误，导致刀片100在工作时，碰撞到障碍物的几率增加，刀片很容易损坏。本发明中，通过在智能割草机上设置上述实施例中的刀片100，智能割草机采用上述的刀片100后，由于刀片100的耐磨性好，能够延长刀片100的使用寿命，减少用户频繁更换刀片100的次数，降低附件成本，便于用户使用。在其他实施例中，割草机也可以为手持割草机或者具有割草功能的多功能机等等。具体的，割草机包括驱动电机与连接于驱动电机的驱动轴，刀盘安装于驱动轴以在驱动轴的带动下转动，进而带动刀片100转动。驱动电机转速太小，动能又不够，导致割草质量差或无法割草，驱动电机转速也不能太大，转速太大，动能则太大，不满足安规要求。在本实施例中，为满足切割质量要求、控制能耗及控制动能等等，驱动电机的转速范围为2000rpm～7500rpm，优选的，驱动电机的转速范围为2800rpm～4000rpm，从而可驱动刀片100高速转动而对被加工件进行切割，在保证刀片100使用寿命的同时保证一定的切割效率。
上述割草机，安装有刀片100而对被加工件进行切割，在保证一定切割效率的情况下无需由于刀片损坏而频繁更换刀片，从而为使用者带来了便利，降低了该割草机的使用成本。
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 (25)

  1. 一种用于割草机上的刀片，所述刀片包括用于切割的切割部及与所述切割部相连接的刀片主体，其特征在于：所述切割部位于所述刀片主体的一侧或相对的两侧，所述切割部的边缘无刃口。
  2. 如权利要求1所述的刀片，其特征在于：所述刀片线速度范围为13.6m/s～51m/s。
  3. 如权利要求2所述的刀片，其特征在于：所述刀片线速度范围为19m/s～27m/s。
  4. 如权利要求1所述的刀片，其特征在于：所述切割部的厚度范围为0.2mm～1.2mm。
  5. 如权利要求4所述的刀片，其特征在于：所述切割部的厚度范围为0.3mm～0.6mm。
  6. 如权利要求4所述的刀片，其特征在于：所述切割部的长度范围不小于0.3mm。
  7. 如权利要求6所述的刀片，其特征在于：所述切割部的长度范围不小于0.5mm。
  8. 如权利要求4所述的刀片，其特征在于：所述刀片主体的厚度范围为0.2mm～2mm。
  9. 如权利要求1所述的刀片，其特征在于：所述切割部的厚度与所述刀片主体的厚度相同。
  10. 如权利要求9所述的刀片，其特征在于：所述切割部及所述刀片主体的厚度范围均为0.2mm～1.2mm。
  11. 如权利要求10所述的刀片，其特征在于：所述切割部及所述刀片主体的厚度范围均为0.3mm～0.6mm。
  12. 如权利要求1所述的刀片，其特征在于：所述切割部包括用于切割的切割端面及连接所述切割端面与所述刀片主体的连接端面，所述刀片主体包括与所述切割端面相垂直的侧面。
  13. 如权利要求12所述的刀片，其特征在于：所述连接端面平滑延伸。
  14. 如权利要求13所述的刀片，其特征在于：所述连接端面平行于所述刀片主体的侧面。
  15. 如权利要求13所述的刀片，其特征在于：所述连接端面沿所述刀片主体的侧面所在的平面直接延伸形成。
  16. 如权利要求1所述的刀片，其特征在于：所述刀片呈矩形。
  17. 如权利要求1所述的刀片，其特征在于：所述刀片的厚度为0.3mm。
  18. 如权利要求1所述的刀片，其特征在于：所述刀片的材料为硬质合金或不锈钢。
  19. 如权利要求1所述的刀片，其特征在于：所述刀片主体开设有安装孔。
  20. 一种割草机，其特征在于：所述割草机包括如权利要求1至19任意一项所述的刀片。
  21. 如权利要求20所述的割草机，其特征在于：所述割草机包括驱动电机及连接所述驱动电机的驱动轴，所述刀片在所述驱动轴的带动下转动，所述驱动电机的转速范围为2000rpm～7500rpm。
  22. 如权利要求21所述的割草机，其特征在于：所述驱动电机的转速范围为2800rpm～4000rpm。
  23. 如权利要求21所述的割草机，其特征在于：所述割草机为智能割草机，所述智能割草机包括外壳、行走系统、切割系统、侦测系统及控制系统，所述切割系统包括所述刀盘及固定于所述刀盘上的所述刀片。
  24. 如权利要求23所述的割草机，其特征在于：所述刀片主体上设置有安装孔，所述割草机还设有固定件，所述固定件穿过所述安装孔将所述刀片固定于所述刀盘上。
  25. 如权利要求23所述的割草机，其特征在于：所述割草机至少具有两个所述刀片，所述刀片围设于所述刀盘上。
PCT/CN2017/102949 2016-09-27 2017-09-22 割草机及其刀片 WO2018059323A1 (zh)

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CN206196349U (zh) * 2016-09-27 2017-05-31 苏州宝时得电动工具有限公司 无刃口刀片及设有该无刃口刀片的动力工具

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US6301868B1 (en) * 1999-08-26 2001-10-16 James D. Siplinger Vortex reducing mower blade
CN200980251Y (zh) * 2006-11-14 2007-11-28 卢俏洋 割草片
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CN103548478A (zh) * 2013-10-31 2014-02-05 苏州安必瑟斯机电技术有限公司 切割刀片
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