WO2021030963A1 - 用于角磨机的护罩组件和角磨机 - Google Patents

用于角磨机的护罩组件和角磨机 Download PDF

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Publication number
WO2021030963A1
WO2021030963A1 PCT/CN2019/101106 CN2019101106W WO2021030963A1 WO 2021030963 A1 WO2021030963 A1 WO 2021030963A1 CN 2019101106 W CN2019101106 W CN 2019101106W WO 2021030963 A1 WO2021030963 A1 WO 2021030963A1
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Prior art keywords
shield
wall
angle grinder
assembly according
side wall
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PCT/CN2019/101106
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English (en)
French (fr)
Inventor
陈锋
王佳
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博世电动工具（中国）有限公司
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Application filed by 博世电动工具（中国）有限公司 filed Critical 博世电动工具（中国）有限公司
Priority to PCT/CN2019/101106 priority Critical patent/WO2021030963A1/zh
Priority to CN201980099381.4A priority patent/CN114423564B/zh
Publication of WO2021030963A1 publication Critical patent/WO2021030963A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines

Definitions

  • the present application relates to the field of angle grinders, and more specifically, the present application relates to a guard assembly used for providing protection during cutting and grinding by an angle grinder and an angle grinder having the guard assembly.
  • Angle grinder is a common portable electric tool that can be used for cutting, grinding and other purposes. When angle grinders are used for cutting and grinding, different types of shields are needed to provide protection. It is common that an angle grinder is equipped with two shields for cutting and grinding. For users, it is cumbersome to replace the shields when switching applications.
  • a shield assembly for an angle grinder including:
  • a first shield including a mounting part for mounting to the angle grinder, a bottom wall connected to the mounting part, and a side wall extending from the outer periphery of the bottom wall to the front side; as well as
  • the second shield includes a rear wall, a front wall and a side wall connected between the rear wall and the front wall, and the second shield can rotate around the first shield Is sleeved on the first shield, wherein the rear wall of the second shield is engaged with the bottom wall of the first shield, and the front end of the side wall of the first shield is formed on the The guide feature on the inner side of the front wall of the second shield engages.
  • An angle grinder is also provided, the angle grinder including the shield assembly according to the embodiments of the application.
  • the shield assembly according to the embodiment of the present application has a simple structure and is easy to install, and it is possible to switch between the functions of the two shields without making complicated structural changes to the existing first shield.
  • Figure 1 shows a perspective view of a first shield according to an embodiment of the present application
  • Figure 2 shows a perspective view of a second shield according to an embodiment of the present application
  • Figure 3 shows a front view of the first shield and the second shield according to the embodiment of the present application when they start to be combined;
  • Figure 4 shows a perspective view of the first shield and the second shield according to the embodiment of the present application when the combination is completed
  • Figure 5 shows an enlarged view of the first end when the first shield and the second shield are combined according to the embodiment of the present application
  • Figure 6 shows an enlarged view of the second end of the first shield and the second shield according to the embodiment of the application when the combination is completed;
  • Figure 7 shows a front view of the first shield and the second shield according to the embodiment of the present application when the combination is completed.
  • Figure 8 shows a rear view of the first shield and the second shield according to the embodiment of the application when the combination is completed
  • the shield assembly can be used for cutting and grinding. It includes a first shield 1 as shown in FIG. 1.
  • the first shield 1 includes a mounting portion 11 for mounting to an angle grinder, and The bottom wall 12 to which the portion 11 is connected, and a side wall 13 extending from the outer periphery of the bottom wall 12 to the front side.
  • front refers to the side further away from the angle grinder after being installed on the main body of the angle grinder, and "rear” refers to the side closer to the angle grinder.
  • the shield assembly further includes: a second shield 2 as shown in FIG. 2.
  • the second shield 2 can be assembled with the first shield 1 to provide protection when the angle grinder is cutting.
  • the second shield 2 includes a rear wall 21, a front wall 22 and a side wall 23 connected between the rear wall 21 and the front wall 22.
  • the second shield 2 has a substantially "U" shape in a radial cross section.
  • the rear wall 21 and the front wall 22 of the second shield 2 are approximately parallel, and the distance therebetween is slightly larger than the thickness of the first shield 1, so that the second shield can be sheathed on the first shield by rotating around the first shield 1. Cover 1 on. Specifically, referring to FIG.
  • the second shield 2 is just sleeved on the first shield 1, and then the second shield 2 can be rotated clockwise, for example, to further combine with the first shield 1.
  • the rear wall 21 of the second shield is kept engaged with the bottom wall 12 of the first shield, and the front end 14 of the side wall 13 of the first shield is formed with The guide features 24 inside the front wall 22 of the second shield 2 engage.
  • the guide feature 24 is an inwardly extending protrusion along the outer periphery of the front wall 22 of the second shield 2, thereby connecting the first shield
  • the front end 14 of the side wall is limited between the side wall 23 of the second shield and the protrusion.
  • the protrusion plays a role of guiding and limiting during the rotation of the second shield 2 relative to the first shield 1, and plays a role of limiting after the second shield 2 and the first shield 1 are assembled.
  • the protrusions include three spaced apart protrusions distributed along the circumference.
  • the protrusions may also extend continuously along the inner periphery of the front wall of the second shield to form "Guide track" arrangement.
  • a protrusion may be provided at the second end 252 of the second shield 2 so as to limit and guide the second shield 2 and the first shield 1 when they are just assembled. Accurate assembly of the operator.
  • the second shield 2 may be made of a metal material, and the protrusions may be formed by partially punching and bending the outer periphery of the front wall 22 of the second shield inward. Therefore, the second shield 22 according to the embodiment of the present application, especially the protrusion, is easy to manufacture.
  • the guiding feature 24 may also take other forms, such as a hemispherical protrusion or groove on the inner side of the front wall of the second shield.
  • the first shield 1 has a first end 151 and a second end 152 in the circumferential direction, and correspondingly, the second shield 2 has a first end 251 and a second end 252 in the circumferential direction.
  • the first end and the second end of the second shield 2 are respectively provided with stoppers, which cooperate with the first end and the second end of the first shield 1, so that the second The shield 2 is fixed in the circumferential direction with respect to the first shield 1.
  • the first end of the second shield 2 has a stopper, for example, in the form of a rib 26, where the second shield 2 is opposite to the first shield When 1 is installed in place, the stopper at the first end of the second shield 2 engages with the first end 151 of the first shield 1.
  • the stopper adopts a rib 26 extending from the rear wall 21 of the second shield 2.
  • the rib 26 can be formed by bending a portion of the rear wall 21 of the second shield 2 , The rib 26 is engaged with the first end of the bottom wall of the first shield 1 to restrict the second shield 2 from further rotating after the second shield is rotated in place.
  • other types of stoppers such as stoppers or bumps, can be used, or the ribs can extend from the side walls of the second shield.
  • a stopper in the form of a nut and a bolt is provided at the second end 252 of the second shield. More specifically, there is a bolt hole 27 at the side wall of the second end of the second shield, and the second shield 2 is rotated relative to the first shield 1 until the rib of the second shield 2 and the first shield When the first end of the bottom wall of the cover 1 is joined, the bolt 28 can be tightened toward the second cover 2 into the bolt hole 27 of the second cover, so that the bolt head of the bolt 28 abuts against the second end of the first cover. ⁇ 152.
  • the second end 152 of the first shield is flush with the second end 252 of the second shield or slightly protrudes from the second end 252 of the second shield, so that the bolt head It can bear against the second end 152 of the first shield and prevent relative shaking of the first shield and the second shield in the circumferential direction.
  • the bolt hole at the second end of the second shield is arranged at the side wall at the second end of the second shield.
  • the bolt hole may also be arranged at the second shield At the back wall.
  • both the first end and the second end of the second shield may adopt stoppers in the form of bolts and nuts.
  • the side wall 23 of the second shield is attached to the side wall 13 of the first shield.
  • the side wall 23 of the second shield and the side wall 13 of the first shield may have a certain gap.
  • the rear wall 21 of the second shield has a smaller width in the radial direction than the front wall 22 thereof, so that the material of the second shield can be saved.
  • the rear wall 21 of the second shield is flush with the first shield at the first end and the second end, and the front wall 22 of the second shield is approximately formed in a partial circular ring shape. For example, it extends approximately 180 degrees.
  • the first shield 1 and the second shield 2 may be coaxial, with their axes aligned with the rotation axis of the angle grinder.
  • the shield assembly according to the embodiment of the present application has a simple structure, is convenient to manufacture and easy to assemble. There is no need to make complicated structural changes to the existing first shield, and the two shield functions can be switched. According to the embodiment of the present application, the second shield can be easily installed without removing the first shield from the angle grinder even when the first shield has been installed to the angle grinder. In addition, the existing shield can be easily modified to realize the structure of the present application.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

一种用于角磨机的护罩组件，包括：第一护罩（1），第一护罩（1）包括用于安装至角磨机的安装部（11），与安装部（11）连接的底壁（12），以及从底壁（12）外周向前侧延伸的侧壁（13）；第二护罩（2），第二护罩（2）包括后壁（21），前壁（22）以及连接在后壁（21）和前壁（22）之间的侧壁（23），第二护罩（2）能够通过绕第一护罩（1）旋转来套设在第一护罩（1）上，其中，第二护罩（2）的后壁（21）与第一护罩（1）的底壁（12）接合，并且第一护罩（1）的侧壁（13）的前端（14）与形成在第二护罩（2）的前壁（22）内侧的引导特征（24）接合。

Description

用于角磨机的护罩组件和角磨机 技术领域
本申请涉及角磨机领域，更具体地，本申请涉及一种用于角磨机切割和打磨时提供保护的护罩组件以及具有该护罩组件的角磨机。
背景技术
角磨机是一种常见的手提式电动工具，可用于切割，研磨等用途。在角磨机用于切割和研磨时，需要不同类型的护罩来提供保护。常见的是一台角磨机配备有分别用于切割和研磨两种用途的两个护罩，对于用户而言，在切换用途时需要更换护罩，这是繁琐的。
另外，存在组合式的护罩，然而现有的组合式护罩结构相对复杂，组装过程需经多个紧固步骤。
发明内容
本申请的目的在于解决或至少缓解现有技术中所存在的问题。
根据一些方面，提供了一种用于角磨机的护罩组件，包括：
第一护罩，所述第一护罩包括用于安装至所述角磨机的安装部，与所述安装部连接的底壁，以及从所述底壁外周向前侧延伸的侧壁；以及
第二护罩，所述第二护罩包括后壁，前壁以及连接在所述后壁和前壁之间的侧壁，所述第二护罩能够通过绕所述第一护罩旋转来套设在所述第一护罩上，其中，所述第二护罩的后壁与所述第一护罩的底壁接合，并且所述第一护罩的侧壁的前端与形成在所述第二护罩的前壁内侧的引导特征接合。
还提供了一种角磨机，所述角磨机包括根据申请的实施例所述的护罩组件。
根据本申请的实施例的护罩组件结构简单且易于安装，无需对现有第一护罩进行复杂的结构变更，即可实现两种护罩功能的切换。
附图说明
图1示出了根据本申请的实施例的第一护罩的立体图；
图2示出了根据本申请的实施例的第二护罩的立体图；
图3示出了根据本申请的实施例的第一护罩和第二护罩开始组合时的正视图；
图4示出了根据本申请的实施例的第一护罩和第二护罩组合完成时的立体图；
图5示出了根据本申请的实施例的第一护罩和第二护罩组合完成时的第一端放大图；
图6示出了根据本申请的实施例的第一护罩和第二护罩组合完成时的第二端放大图；
图7示出了根据本申请的实施例的第一护罩和第二护罩组合完成时的前视图；以及
图8示出了根据本申请的实施例的第一护罩和第二护罩组合完成时的后视图；
具体实施方式
参考附图1至图8来介绍根据本发明的一个实施例的用于角磨机的护罩组件，应当理解，附图示出的许多细节仅为示例性的而非限制性的。根据本申请的实施例的护罩组件可用于切割和研磨，其包括如图1所示的第一护罩1，第一护罩1包括用于安装至角磨机的安装部11，与安装部11连接的底壁12，以及从底壁12外周向前侧延伸的侧壁13。本文中“前”指的是在安装至角磨机主体后更远离角磨机的一侧，“后”则指更接近角磨机的一侧。图1中示出的第一护罩1可在角磨机研磨时使用。护罩组件还包括：如图2所示的第二护罩2。第二护罩2可与第一护罩1组装以便在角磨机切割时提供保护。第二护罩2包括后壁21，前壁22以及连接在后壁21和前壁22之间的侧壁23。尽管未示出，应当理解，第二护罩2在沿径向的截面中大致呈“U”型。第二护罩2的后壁21和前壁22大致平行，其间的间距稍大于第一护罩1的厚度，使得第二护罩能够通过绕第一护罩1旋转来套设在第一护罩1上。具体而言，可参考图3，第二护罩2刚套设至第一护罩1，随后可例如使第二护罩2沿顺时针旋转，以进一步与第一护罩1组合。如图4所示，在该旋转过程中和组装完毕时，第二护罩的后壁21与第一护罩的底壁12保持接合，并且第一护罩的侧壁13的前端14与形成在第二护罩2的前壁22内侧的引导特征24接合。
如图2和图5中更清楚地示出，在一些实施例中，引导特征24为沿第二 护罩2的前壁22的外周的向内延伸的凸起，由此将第一护罩的侧壁的前端14限制在第二护罩的侧壁23和所述凸起之间。凸起在第二护罩2相对于第一护罩1转动的过程中起到引导和限位的作用，在第二护罩2与第一护罩1组装完毕后起到限位的作用。在图示的实施例中，凸起包括沿圆周分布的三个间隔开的凸起，在备选实施例中，凸起也可沿第二护罩的前壁的外周内侧连续地延伸，形成“引导轨道”的布置。在一些实施例中，尽管未示出，可在第二护罩2的第二端252处设置凸起，以便在第二护罩2和第一护罩1刚组装时限位并引导，便于两者的准确组装。在一些实施例中，如图所示，第二护罩2可由金属材料制成，凸起则可通过第二护罩的前壁22的外周局部向内冲压弯折形成。因此，根据本申请的实施例的第二护罩22尤其是凸起是易于制造的。在其他实施例中，引导特征24也可采用其他形式，如第二护罩的前壁内侧的半球形凸起或凹槽等。
第一护罩1具有圆周方向上的第一端151和第二端152，对应地，第二护罩2具有圆周方向上的第一端251和第二端252。在组装完成后，在第二护罩2的第一端和第二端分别具有止挡件，所述止挡件与第一护罩1的第一端和第二端协作，以使得第二护罩2相对于第一护罩1在圆周方向上固定。在具体的实施例中，参考图4和图5，第二护罩2的第一端具有止挡件，例如，其采用挡边26的形式，在第二护罩2相对于第一护罩1安装就位时，第二护罩2的第一端处的止挡件与第一护罩1的第一端151接合。在图示的实施例中，止挡件采用从第二护罩2的后壁21延伸出的挡边26，该挡边26可通过使第二护罩2的后壁21的部分折弯形成，该挡边26与第一护罩1的底壁的第一端接合，以在第二护罩旋转就位后限制第二护罩2进一步旋转。在备选实施例中，可采用其他形式的止挡件，如挡块或凸块等，或者挡边可从第二护罩的侧壁延伸出。
在一些实施例中，参考图4和图6，第二护罩的第二端252处设置有采用螺母和螺栓形式的止挡件。更具体地，在第二护罩的第二端的侧壁处具有螺栓孔27，并且，在第二护罩2相对于第一护罩1旋转至第二护罩2的挡边与第一护罩1的底壁的第一端接合时，可通过将螺栓28朝第二护罩2拧紧至第二护罩的螺栓孔27中，使得螺栓28的螺栓头顶靠至第一护罩的第二端152。在一些实施例中，如图6所示，第一护罩的第二端152与第二护罩的第二端252齐平或稍突出于第二护罩的第二端252，使得螺栓头能够顶靠第一护罩的第二端152，并防止第一 护罩和第二护罩两者在圆周方向上的相对晃动。在所示的实施例中，第二护罩的第二端处的螺栓孔布置在第二护罩的第二端处的侧壁处，备选地，螺栓孔也可布置在第二护罩的后壁处。在另一些实施例中，第二护罩的第一端和第二端均可采用螺栓和螺母形式的止挡件。
如图6所示，第二护罩的侧壁23与第一护罩的侧壁13贴合。在备选实施例中，第二护罩的侧壁23和第一护罩的侧壁13可具有一定的间隙。参考图7和图8，第二护罩的后壁21具有比其前壁22在径向上更小的宽度，这样可节省第二护罩的材料。如图7和图8所示，第二护罩的后壁21在第一端和第二端处与第一护罩齐平，第二护罩的前壁22大致形成为部分圆环形，如大约延伸180度左右。第一护罩1和第二护罩2可为同轴的，其轴线与角磨机的转轴对齐。
根据本申请的实施例的护罩组件结构简单，制造方便且便于组装。无需对现有第一护罩进行复杂的结构变更，即可实现两种护罩功能的切换。根据本申请的实施例，在第一护罩已安装至角磨机的情况下仍然可容易地安装第二护罩，而无需从角磨机拆卸第一护罩。另外，还可容易地对现有护罩进行改造以实现本申请的结构。

Claims (10)

  1. 一种用于角磨机的护罩组件，其特征在于，包括：
    第一护罩(1)，所述第一护罩(1)包括用于安装至所述角磨机的安装部(11)，与所述安装部(11)连接的底壁(12)，以及从所述底壁(12)外周向前侧延伸的侧壁(13)；以及
    第二护罩(2)，所述第二护罩(2)包括后壁(21)，前壁(22)以及连接在所述后壁(21)和前壁(22)之间的侧壁(23)，所述第二护罩(2)能够通过绕所述第一护罩(1)旋转来套设在所述第一护罩(1)上，其中，所述第二护罩(2)的后壁(21)与所述第一护罩(1)的底壁(12)接合，并且所述第一护罩(1)的侧壁(13)的前端(14)与形成在所述第二护罩的前壁内侧的引导特征(24)接合。
  2. 根据权利要求1所述的护罩组件，其特征在于，所述引导特征(24)为沿所述第二护罩的前壁内侧的外周向内延伸的凸起，由此将所述第一护罩的侧壁的前端(14)限制在所述第二护罩的侧壁(23)和所述凸起之间。
  3. 根据权利要求2所述的护罩组件，其特征在于，所述凸起沿所述第二护罩的前壁内侧的外周向内连续延伸或间隔延伸。
  4. 根据权利要求2所述的护罩组件，其特征在于，所述凸起通过所述第二护罩的前壁的外周处局部向内弯折形成。
  5. 根据权利要求1所述的护罩组件，其特征在于，所述第二护罩的第一端(251)和第二端(252)均具有止挡件，以在所述第二护罩与所述第一护罩组装时限制两者的相对转动。
  6. 根据权利要求5所述的护罩组件，其特征在于，所述第二护罩的第一端处的止挡件为从所述第二护罩的第二端处的后壁(21)或侧壁(23)延伸出的向内的挡边(26),并且，所述第二护罩的第二端(252)处的止挡件包括螺栓孔(27)和螺栓(28)，在所述第二护罩(2)相对于所述第一护罩(1)安装就位时，所述第二护罩的第一端处的止挡件(26)与所述第一护罩的第一端(151)接合，而螺栓(28)朝所述第二护罩(2)拧紧至所述第二护罩的螺栓孔(27)中，使得所述螺栓(28)的螺栓头顶靠至所述第一护 罩的第二端(152)。
  7. 根据权利要求5所述的护罩组件，其特征在于，所述第二护罩的第二端处的螺栓孔(28)布置在所述第二护罩的第二端处的后壁(21)或侧壁(23)。
  8. 根据权利要求1所述的护罩组件，其特征在于，在组装时，所述第二护罩的侧壁(23)与所述第一护罩的侧壁(13)贴合。
  9. 根据权利要求1所述的护罩组件，其特征在于，所述第二护罩的所述后壁(21)具有比所述第二护罩的前壁(22)更小的沿径向的宽度。
  10. 一种角磨机，其特征在于，所述角磨机包括如权利要求1-9中任一项所述的护罩组件。
PCT/CN2019/101106 2019-08-16 2019-08-16 用于角磨机的护罩组件和角磨机 WO2021030963A1 (zh)

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