WO2021030953A1 - 角磨机及其防护罩组件 - Google Patents

角磨机及其防护罩组件 Download PDF

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Publication number
WO2021030953A1
WO2021030953A1 PCT/CN2019/101071 CN2019101071W WO2021030953A1 WO 2021030953 A1 WO2021030953 A1 WO 2021030953A1 CN 2019101071 W CN2019101071 W CN 2019101071W WO 2021030953 A1 WO2021030953 A1 WO 2021030953A1
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WIPO (PCT)
Prior art keywords
protective cover
wall
angle grinder
assembly
main
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PCT/CN2019/101071
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English (en)
French (fr)
Inventor
刘有平
洪嘉
Original Assignee
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/CN2019/101071 priority Critical patent/WO2021030953A1/zh
Priority to DE112019007373.7T priority patent/DE112019007373T5/de
Priority to CN201980099375.9A priority patent/CN114728395B/zh
Publication of WO2021030953A1 publication Critical patent/WO2021030953A1/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
    • 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
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided

Definitions

  • This application relates to electric tools, in particular to angle grinders and their protective cover components.
  • the angle grinder is a widely used electric tool. Its main purposes are grinding, polishing and cutting. Cutting requires the use of a closed guard, while grinding only needs to use a half guard. In actual use, it is often necessary to switch between these two working states. In view of this, it is necessary to replace the shield according to use requirements, and the replacement of the shield is often very cumbersome. Not only needs to prepare two sets of guards in advance, which increases the cost of the angle grinder and is not portable, but also requires a series of disassembly and installation operations with the help of a variety of tools to replace the guards, which can not be done in one step, which directly leads to the reduction of work efficiency. .
  • the main purpose of this application is to provide a protective cover assembly that facilitates the rapid switching of the two protective cover functions and an angle grinder with the protective cover assembly.
  • the present application provides a protective cover assembly for an angle grinder, including a main protective cover and an auxiliary cover detachably assembled to the main protective cover.
  • the main protective cover includes A fixed ring connected to the unit, a first wall surface connected to the fixed ring and arranged parallel to the rotating working plane of the angle grinder, and an annular peripheral wall formed generally perpendicular to the first wall surface, one end of the annular peripheral wall away from the first wall surface
  • the auxiliary cover has an inner folding edge
  • the auxiliary cover has a second wall surface opposite to the first wall surface and a fixing part buckled with the inner folding edge
  • the first wall surface, the annular peripheral wall and the second wall surface are jointly surrounded and formed Protective space with cutting function opening.
  • the present application also provides an angle grinder, which includes a machine neck, an output shaft, and an angle grinding plate assembled on the output shaft, the angle grinder further includes the protective cover assembly, and the fixed ring hoop At the neck of the machine, part of the angle grinders protrude from the cutting function opening.
  • the protective cover assembly uses the existing inner folding edge of the main protective cover to fix the auxiliary cover, and can realize the switching of the two protective cover functions without complicated structural changes to the existing main protective cover.
  • Figure 1 shows a schematic diagram of the three-dimensional structure of the angle grinder of the present application
  • Fig. 2 shows an exploded structure diagram of the main protective cover and the auxiliary cover of the protective cover assembly of the present application
  • FIG. 3 shows a schematic diagram of the assembly structure of the main protective cover and the auxiliary cover of the protective cover assembly of the present application
  • Fig. 4 shows a schematic structural diagram of a second specific embodiment of the auxiliary cover of the present application
  • Fig. 5 shows a schematic structural diagram of a third specific embodiment of the auxiliary cover of the present application.
  • Fig. 6 shows a schematic structural diagram of a fourth specific embodiment of the auxiliary cover of the present application.
  • the angle grinder 400 includes a machine neck 401, an output shaft 402, and an angle grinder (not shown) assembled on the output shaft 402.
  • a protective cover assembly 100 is at least partially Surround the angle grinding plate.
  • the protective cover assembly 100 includes a main protective cover 10 and an auxiliary cover 20 that is detachably assembled to the main protective cover 10, and the main protective cover 10 includes The fixed ring 101 of the machine neck 401, the first wall 102 connected to the fixed ring 101 and arranged parallel to the rotating working plane of the angle grinder, and the annular peripheral wall 103 formed by bending relative to the first wall 102, The end of the annular peripheral wall 103 away from the first wall surface 102 has an inner folding edge 104, and the auxiliary cover 20 has a second wall surface 201 opposite to the first wall surface 102 and a fixing part buckled with the inner folding edge 104 202.
  • the first wall surface 102, the annular peripheral wall 103 and the second wall surface 201 jointly enclose a protective space 30 with a cutting function opening 301.
  • a part of the angle grinder 403 is enclosed by the protective space 30, and another part extends out of the protective space 30 from the cutting function opening 301 for cutting work.
  • the protective cover assembly 100 uses the existing inner folding edge 104 of the main protective cover 10 to fix the auxiliary cover 20, and the switching of the two protective cover functions can be realized without complicated structural changes to the existing main protective cover 10.
  • the first wall surface 102 and the annular peripheral wall 103 of the main protective cover 10 cover a sector area of 150° to 180°, and the second wall surface 201 of the auxiliary cover 20 covers a sector area equivalent to the first wall surface 102.
  • the auxiliary cover 20 has a notch 204 that can give way to the end of the output shaft of the angle grinder.
  • the inner flange 104 of the main protective cover 10 is annular, and the fixing portion 202 of the auxiliary cover 20 is an entire annular recess 202' to achieve a more stable fixing.
  • the fixing portion of the auxiliary cover 20 may also be a set of distributed dot recesses 202", which are fixed to the inner flange of the main protective cover 10 through multi-point cooperation. 104.
  • the inner folding edge 104 and the fixing portion 202 are assembled into one body by rotating and fitting, and the auxiliary cover 20 has a protective edge 203 surrounding the outer surface of the annular peripheral wall 103.
  • the main protective cover 10 the auxiliary cover 20 and the output shaft 402 are coaxially arranged, so the rotation can be understood as the auxiliary cover 20 rotates around the output shaft 402 and is fitted with the main protective cover 10.
  • the annular recess 202' or the set of point recesses 202" has a circumferentially open fitting starting end 2021 and a circumferentially stopping fitting stop end 2022, so as to define the assembly direction and end point of the auxiliary cover 20 , To avoid operator confusion and over-spin operation errors.
  • the rotational fitting method has higher fastening force and stability, and can withstand higher vibration and external impact, but it is not the only way to realize the concept of the present invention.
  • the auxiliary cover 20 may also be positioned from the cutting function opening 301 with its second wall 201 parallel to the first wall 102 of the main protective cover.
  • the outer side is assembled to the main protective cover 10, that is, the auxiliary cover 20 is horizontally inserted into the main protective cover 10 along a direction parallel to the angle grinding plate, and the inner folding edge 104 and the fixing portion 202 are matched.
  • the protective edge 203 is canceled, and the inner folding edge 104 and the fixing portion 202 are cooperated to achieve holding independently.
  • this design does not have a circumferentially open fitting starting end design, instead two fitting stop ends 2022 are used to stop the auxiliary cover 20 after it is assembled.
  • two fitting stop ends 2022 are used to stop the auxiliary cover 20 after it is assembled.
  • it can still be selected to be deformed during the assembly process to cross the annular peripheral wall and reset to the outer wall surface of the annular peripheral wall to assist in fixing the auxiliary cover to the main protective cover.
  • the auxiliary cover 20 can also move in a direction approaching the first wall 102 with its second wall 201 parallel to the first wall 102 of the main protective cover 10 and be assembled to all
  • the auxiliary cover 20 has a fixing portion 202 that can be deformed during the assembly process to be assembled with the inner flange 104. That is, the auxiliary cover 20 is vertically inserted into the main protective cover 10 along the direction perpendicular to the angle grinding plate, and the inner folding edge 104 and the fixing portion 202 are matched.
  • the characteristic of this assembly method is that the rigid protective edge 203 can be retained, and the deformed part is located at the upper edge 205 of the recess 202. It also has quick assembly, and the protective edge can be used to buffer the external impact of the auxiliary cover 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

一种角磨机（400）用防护罩组件（100），包括主防护罩（10）和可拆卸地组装于主防护罩（10）的辅助罩（20），主防护罩（10）包括用以和角磨机（400）组接的固定环（101）、与固定环（101）连接且平行于角磨机旋转工作平面设置的第一壁面（102）以及总体垂直于第一壁面（102）形成的环形周壁（103），环形周壁（103）远离第一壁面（102）的一端具有内折缘（104），辅助罩（20）具有与第一壁面（102）相对的第二壁面（201）以及与内折缘（104）扣合的固定部（202）。

Description

角磨机及其防护罩组件 技术领域
本申请涉及电动工具，尤其涉及角磨机及其防护罩组件。
背景技术
角磨机是使用较为广泛的一种电动工具，其用途主要有磨削、抛光和切割等，切割需要使用封闭护罩，而磨削只要使用半护罩即可。在实际使用中经常需要在这两种工作状态之间进行切换，鉴于此，也就需要根据使用需求进行护罩的更换，而护罩的更换往往是非常繁琐的。不但需要事先准备好两套护罩，增加了角磨机的成本且不便携带，而且更换护罩还要借助多种工具进行一系列的拆卸和安装操作，不能一步到位，直接导致工作效率的降低。
因此，有必要改进以克服现有技术中存在的技术问题。
发明内容
本申请要解决的主要是提供一种便于两种护罩功能快速切换的防护罩组件及具有其的角磨机。
为解决上述技术问题，本申请提供了一种角磨机用防护罩组件，包括主防护罩和可拆卸地组装于所述主防护罩的辅助罩，所述主防护罩包括用以和角磨机组接的固定环、与所述固定环连接且平行于角磨机旋转工作平面设置的第一壁面以及总体垂直于所述第一壁面形成的环形周壁，所述环形周壁远离第一壁面的一端具有内折缘，所述辅助罩具有与所述第一壁面相对的第二壁面以及与所述内折缘扣合的固定部，所述第一壁面、环形周壁和第二壁面共同围设形成具有切割功能开口的防护空间。
本申请还提供了一种角磨机，包括机器颈部、输出轴以及组装于所述输出轴的角磨片，所述角磨机还包括所述的保护罩组件，所述固定环箍设于所述机器颈部，部分的所述角磨片从所述切割功能开口伸出。
根据本申请，所述防护罩组件利用主防护罩现有的内折缘对辅助罩进行固 定，无需对现有主防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
结合附图参阅以下具体实施方式的详细说明，将更加充分地理解本申请。其中：
图1显示本申请角磨机的立体结构示意图；
图2显示本申请防护罩组件的主防护罩和辅助罩的分解结构示意图；
图3显示本申请防护罩组件的主防护罩和辅助罩的组装结构示意图；
图4显示本申请辅助罩第二种具体实施方式的结构示意图；
图5显示本申请辅助罩第三种具体实施方式的结构示意图；
图6显示本申请辅助罩第四种具体实施方式的结构示意图。
具体实施方式
请参阅附图1至图6，所述角磨机400包括机器颈部401、输出轴402以及组装于所述输出轴402的角磨片(图未示)，一个保护罩组件100至少部分地包围所述角磨片。下面结合其他附图，详细描述本申请角磨机400及其防护罩组件100的具体实施方式。不同实施例之间主体结构类似，为便于理解和说明，相同结构采用相同标号，特此说明。
请重点结合图2和图3，所述防护罩组件100，包括主防护罩10和可拆卸地组装于所述主防护罩10的辅助罩20，所述主防护罩10包括用以箍设于所述机器颈部401的固定环101、与所述固定环101连接且平行于角磨机旋转工作平面设置的第一壁面102以及相对于所述第一壁面102弯折形成的环形周壁103，所述环形周壁103远离第一壁面102的一端具有内折缘104，所述辅助罩20具有与所述第一壁面102相对的第二壁面201以及与所述内折缘104扣合的固定部202，所述第一壁面102、环形周壁103和第二壁面201共同围设形成具有切割功能开口301的防护空间30。所述角磨片403的一部分被所述防护空间30围设，另一部分从所述切割功能开口301伸出所述防护空间30外，以供进行切割工作。所述防护罩组件100利用主防护罩10现有的内折缘104对辅助罩20进行固定，无需对现有主防护罩10进行复杂的结构变更，即可实现两种护罩功能的切换。
所述主防护罩10的第一壁面102和环形周壁103覆盖150°至180°的扇面区域，所述辅助罩20的第二壁面201覆盖与第一壁面102相当的扇面区域。 所述辅助罩20具有可让位角磨机输出轴末端的缺口204。所述主防护罩10的内折缘104呈环形，所述辅助罩20的固定部202为一整个环形凹部202’，以实现更稳定的固定。当然，请参阅图4，在其他一些实施例中，所述辅助罩20的固定部也可以是若干个分布的点凹部集合202”，通过多点的配合固定至主防护罩10的内折缘104。
请着重参阅图2至图4，所述内折缘104和固定部202通过旋转嵌合而装配成一体，所述辅助罩20具有围设于所述环形周壁103外壁面的护缘203。理想状态下，主防护罩10、辅助罩20与输出轴402系同轴设置,因而所述旋转可以理解为辅助罩20围绕输出轴402旋转并与所述主防护罩10嵌合。进一步地，所述环形凹部202’或者点凹部集合202”具有周向开口的嵌合起始端2021和周向止挡的嵌合挡止端2022，以对辅助罩20的装配方向和终点进行定义，避免操作者混淆和过旋等操作失误。
当然，所述旋转嵌合的方式具有更高的紧固力和稳定性，可以承受更高的振动和外力冲击，但并不是实现本发明构思的唯一方式。例如，请着重参阅图5所示的另一种实施例，所述辅助罩20也可以以其第二壁面201平行于所述主防护罩第一壁面102的姿态，从所述切割功能开口301外侧组装至所述主防护罩10，即，将所述辅助罩20沿着平行于角磨片的方向水平插入所述主防护罩10，完成内折缘104和固定部202的配合。此时，所述护缘203取消而独立依靠所述内折缘104和固定部202的配合实现固持。同时，由于不再是旋转装配，该设计没有了周向开口的嵌合起始端设计，取而代之的是两个嵌合挡止端2022实现对辅助罩20完成装入后的挡止。当然，在本发明构思的基础上，依然可以选用可在组装过程中形变以越过所述环形周壁并复位于所述环形周壁的外壁面以辅助将所述辅助罩固定于主防护罩。
而且，请参阅图6，所述辅助罩20还可以以其第二壁面201平行于所述主防护罩10第一壁面102的姿态，朝接近所述第一壁面102的方向运动并组装至所述主防护罩10，所述辅助罩20具有可在组装过程中形变以与所述内折缘104装配的固定部202。即，将所述辅助罩20沿着垂直于角磨片的方向竖直插入所述主防护罩10，完成内折缘104和固定部202的配合。这种装配方式的特点在于：刚性的护缘203可以保留,形变部分位于凹部202的上缘205。同样具有快速装配， 且可以利用护缘缓冲所述辅助罩20受到的外力冲击。
以上具体实施方式仅用于说明本申请，而并非对本申请的限制。综上，有关技术领域的普通技术人员，在不脱离本申请的范围的情况下，还可以做出各种变化和变型，因此所有等同的技术方案也属于本申请的范畴，本申请的专利保护范围应由权利要求限定。

Claims (9)

  1. 一种角磨机用防护罩组件(100)，包括主防护罩(10)和可拆卸地组装于所述主防护罩(10)的辅助罩(20)，其特征在于：所述主防护罩(10)包括用以和角磨机组接的固定环(101)、与所述固定环(101)连接且平行于角磨机旋转工作平面设置的第一壁面(102)以及相对于所述第一壁面(102)弯折形成的环形周壁(103)，所述环形周壁(103)远离第一壁面(102)的一端具有内折缘(104)，所述辅助罩(20)具有与所述第一壁面(102)相对的第二壁面(201)以及与所述内折缘(104)扣合的固定部(202)，所述第一壁面(102)、环形周壁(103)和第二壁面(201)共同围设形成具有切割功能开口(301)的防护空间(30)。
  2. 根据权利要求1所述的角磨机用防护罩组件(100)，其特征在于，所述主防护罩(10)的内折缘(104)呈环形，所述辅助罩(20)的固定部(202)为一整个环形凹部(202’)或者若干个分布的点凹部集合(202”)。
  3. 根据权利要求1所述的角磨机用防护罩组件(100)，其特征在于，所述内折缘(104)和固定部(202)通过旋转嵌合而装配成一体，所述辅助罩(20)具有围设于所述环形周壁(103)外壁面的护缘(203)。
  4. 根据权利要求2所述的角磨机用防护罩组件(100)，其特征在于，所述环形凹部(202’)或者点凹部集合(202”)具有周向开口的嵌合起始端(2021)和周向止挡的嵌合挡止端(2022)。
  5. 根据权利要求2所述的角磨机用防护罩组件(100)，其特征在于，所述辅助罩(20)以其第二壁面(201)平行于所述主防护罩(10)第一壁面(102)的姿态，从所述切割功能开口(301)外侧组装至所述主防护罩(10)。
  6. 根据权利要求2所述的角磨机用防护罩组件(100)，其特征在于，所述辅助罩(20)以其第二壁面(201)平行于所述主防护罩(10)第一壁面(102)的姿态，朝接近所述第一壁面(102)的方向运动并组装至所述主防护罩(10)，所述辅助罩(20)具有可在组装过程中形变以与所述内折缘(104)装配的固定部 (202)。
  7. 根据权利要求1-6中任一项所述的角磨机用防护罩组件(100)，其特征在于，所述辅助罩(20)具有可让位角磨机输出轴末端的缺口(204)。
  8. 根据权利要求1-6中任一项所述的角磨机用防护罩组件(100)，其特征在于，所述主防护罩(10)的第一壁面(102)和环形周壁(103)覆盖150°至180°的扇面区域，所述辅助罩(20)的第二壁面(201)覆盖与第一壁面(102)相当的扇面区域。
  9. 一种角磨机(400)，包括机器颈部(401)、输出轴(402)以及组装于所述输出轴(402)的角磨片(403)，其特征在于：所述角磨机(400)还包括如权利要求1-8所述的保护罩组件(100)，所述固定环(101)箍设于所述机器颈部(402)，部分的所述角磨片(403)从所述切割功能开口(301)伸出。
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