EP1162032A2 - Outil motorisé portatif, en particulier meuleuse pour béton - Google Patents

Outil motorisé portatif, en particulier meuleuse pour béton Download PDF

Info

Publication number
EP1162032A2
EP1162032A2 EP01111818A EP01111818A EP1162032A2 EP 1162032 A2 EP1162032 A2 EP 1162032A2 EP 01111818 A EP01111818 A EP 01111818A EP 01111818 A EP01111818 A EP 01111818A EP 1162032 A2 EP1162032 A2 EP 1162032A2
Authority
EP
European Patent Office
Prior art keywords
sealing element
tool according
protective hood
flexible
hand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01111818A
Other languages
German (de)
English (en)
Other versions
EP1162032A3 (fr
EP1162032B1 (fr
Inventor
Manfred Schuele
Guenter Schaal
Albert Kleider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1162032A2 publication Critical patent/EP1162032A2/fr
Publication of EP1162032A3 publication Critical patent/EP1162032A3/fr
Application granted granted Critical
Publication of EP1162032B1 publication Critical patent/EP1162032B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • 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

Definitions

  • the invention is based on a hand tool, in particular one Concrete grinder, the type defined in the preamble of claim 1.
  • a hand tool of this type is known (DE 195 03 201 A1), at of the sealing element in the form of a sealing brush at the bottom of a rigid protective hood is firmly attached in a U-profile retaining ring. At most, the bristles of the sealing brush are deformable within the scope of their Deformability.
  • DE 43 22 284 A1 is the protective cover made of rubber-like flexible material and designed with resilience. This makes the protective cover compared to one rigid, metallic protective hood susceptible to damage or destruction.
  • the hand tool according to the invention with the features of Claim 1 has the advantage that the protective cover itself as before can be made of metal and nevertheless due to the resilient Bracket of the sealing element created a flexibility in this area is.
  • the bristles of a sealing element designed as a sealing brush are thereby less stressed, resulting in the life of such a sealing element is increased.
  • Another advantage is that the sealing element quickly and easily without the need for special tools can be replaced. Because of the resilient holder is a possible tendency of the bristles to tilt Sealing element in the form of a sealing brush is reduced, making it easier to use the hand machine tool is reached.
  • An independent object of the invention is also one Protective hood designed according to the invention, for attachment to a Hand machine tool is intended.
  • Fig. 1 is a part of a hand tool 10 in the training as Angle grinder, and here in particular as a concrete grinder, shown the one Has motor housing 12 which is flanged to a gear housing 14.
  • the Motor housing 12 contains an electric motor, not specified.
  • the Gear housing 14 contains an angular gear 16 with a right angle to Motor housing 12 arranged work spindle 18, which has an upper Spindle bearing 19 and a lower spindle bearing 20 rotatably in the gear housing 14 is stored.
  • the lower spindle bearing 20 sits with its outer ring in a neck part 22 and grips the work spindle 18 with its inner ring.
  • On the outer ring of the Spindle bearing 20 is axially supported by a concavely curved away from the spindle bearing 20 Sealing washer 24 in the form of a plate spring on the work spindle 18 with this is held all around.
  • On the side facing away from the spindle bearing 20 the sealing washer 24 axially abuts an approximately hat-like cover washer 26 which also sits on the work spindle 18.
  • a small axial gap 28 formed, which is dimensioned so that the cover 26 at Tumbling movements of the lower region of the work spindle 18 and the neck part 22 not touched.
  • the work spindle 18 carries at its end a lower screw flange 32 which a tool 34, e.g. a grinding wheel, in particular a cup grinding wheel, clamps against an upper support flange 36.
  • a tool 34 e.g. a grinding wheel, in particular a cup grinding wheel
  • the neck portion 22 is encompassed by the flange 38 of a protective hood 40 which is attached to a shoulder 23 of the neck part 22 is axially fixed, e.g. by means of screws or the like Fasteners is attached.
  • the protective hood 40 has no further designated openings for generating a secondary air flow through which Excessive negative pressure or high pressure fluctuations can be prevented.
  • the protective hood 40 has a flexible at its lower edge region 39 Sealing element 42 with which the hand tool 10 at Processing in particular the surface of a not shown Workpiece sits on this surface.
  • the sealing element prevents this 42 an emergence of during the machining of the workpiece Particles, dust or the like under the lower edge of the sealing element 42 outward.
  • the sealing element 42 can be designed in a variety of ways. Both The exemplary embodiments shown are each the sealing element 42 as a sealing brush 43, which e.g. has a curved U-profile strip 45, between whose legs 47, 48 hold a series of bristles 46 in a clamped manner, whereby a brush is formed which is sufficiently stable that it can support the weight of the hand machine tool without being damaged or to be destroyed.
  • This resilient bracket results in this Sealing element 42 a low stress on the bristles 46 and a high one Lifespan.
  • the Spring behavior can be set so that the sealing element 42 is resilient is pressed against the surface to be processed, while lifting the Hand tool 10 from the workpiece, the sealing element 42 due the resilient return automatically to the starting position defers.
  • the sealing element 42 cannot because of the resilient holder spring only in the axial direction, but also at an angle to it. This allows the Handheld power tool 10 is also held somewhat obliquely, at least within limits without the all-round tight contact of the protective hood 40 the sealing element 42 on the workpiece surface suffers. Because of the resilient Bracket results in a lower tendency of the bristles 46 to tilt and thereby to make work easier when handling the handheld power tool 10. It is understood that the subject of the invention is not just one with such configured protective hood 40 is handheld power tool 10, but that the subject matter of the invention also just as well a protective hood 40 as an independent component.
  • the edge region 39 of the protective hood 40 has a lower, inward protruding holding edge 51.
  • This holding edge 51 delimits one on the underside approximately groove-like circumferential ring receptacle 52 of the edge region 39, which is on is located on the inside and is open on the inside.
  • the sealing element 42 is in the first embodiment as an open, circumferential strip part 62 formed in the inner edge region 39, in particular in the ring receptacle 52, the protective hood 40 loose and such is inserted that the ends of the strip part 62 that are not visible here bump into each other and / or are connected.
  • the strip part 62 can be inserted into the ring receptacle 52 with radial prestress.
  • the Sealing element 42 in the form of the strip part 62 has one on the outside protruding edge part 63, which e.g. integral part of the U-profile strip is 45.
  • the sealing element 42 is with this edge part 63 from above forth on the lower holding edge 51 of the protective hood 40, which Sealing element 42 in the form of the strip part 62 with the flexible element 50 the edge part 63 is pressed against the holding edge 51.
  • sealing element 42 there also shown in the form of a strip part 62 of the same type that this still has a towering web 64 on the inside. 1 to 3 Shown first embodiment of the sealing element 42 in the form of Strip part 62 can, in addition to the edge part 63, with one towering web 64 may be provided. The edge part 63 and possibly the Web 64 serve for the flexible element 50 to be supported thereon.
  • this is at least a flexible element 50 formed from an open, circumferential spring member 70, which is supported on the protective hood 40 and on the edge portion 63 of the Seals element 42 presses and this against the holding edge 51 of the protective hood 40th presses.
  • the spring member 70 is radially preloaded and such from the inside the protective hood 40, e.g. in the area of the ring seat 52, that the Not shown ends of the spring member 70 butt and / or are interconnected, which prevents the radial Preload drops.
  • the sealing element 42 in the form of the strip part 62 analog the third embodiment in Fig. 5 also with a towering Provided web 64, the spring member 70 in FIGS. 2 and 3 can also on one such a towering web 64.
  • the spring member 70 can also e.g. as a wave-shaped, meandering or the like shaped tension spring be trained.
  • the sealing element 42 in The shape of the sealing brush 43 can be as in the exemplary embodiment in FIGS. 2 and 3 be designed with or without laterally protruding edge part 63.
  • the least a flexible element 50 here consists of a rubber-like flexible element and is in particular designed as a carrier 80 made of rubber, which with the Sealing element 42 is provided.
  • the sealing element 42 is fixed in this carrier 80 or, if desired, also held interchangeably.
  • the carrier 80 in turn is at the edge area 39, e.g.
  • FIG. 5 is similar to the first embodiment in FIG. 1 to 3, but with the flexible element 50 in the form of the spring member 70 a rubber-like flexible circumferential strip part 71 is formed, which in the Ring receptacle 52 is inserted.
  • the strip part 71 fills the area of Ring receptacle 52 essentially, both on the outside protruding edge part 63 of the sealing element 42 as well as on the here provided, projecting web 64 rests and can be supported.
  • That rubbery flexible strip part 71 can be firmly connected to the sealing element 42, e.g. glued or clipped to it.
  • the strip part 71 in relation to the sealing element 42 can also be a loose, independent component.
  • the strip part 71 is also loose and inserted in such a way that the ends of the strip part 71 abut each other and / or with each other are connected.

Landscapes

  • 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)
EP20010111818 2000-06-07 2001-05-16 Outil motorisé portatif, en particulier meuleuse pour béton Expired - Lifetime EP1162032B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10028128 2000-06-07
DE2000128128 DE10028128A1 (de) 2000-06-07 2000-06-07 Handwerkzeugmaschine, insbesondere Betonschleifer

Publications (3)

Publication Number Publication Date
EP1162032A2 true EP1162032A2 (fr) 2001-12-12
EP1162032A3 EP1162032A3 (fr) 2003-10-22
EP1162032B1 EP1162032B1 (fr) 2007-10-24

Family

ID=7644953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010111818 Expired - Lifetime EP1162032B1 (fr) 2000-06-07 2001-05-16 Outil motorisé portatif, en particulier meuleuse pour béton

Country Status (3)

Country Link
EP (1) EP1162032B1 (fr)
JP (1) JP2002018693A (fr)
DE (2) DE10028128A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007013705U1 (de) * 2007-10-01 2009-02-19 Mafell Ag Bearbeitungswerkzeug
CN102717312A (zh) * 2012-07-19 2012-10-10 倪玉萍 一种适合在任意阴角处使用的新型无尘打磨机
US9505472B2 (en) 2013-06-13 2016-11-29 Dg-Diving Group Ltd. Apparatus and method for treating an underwater surface
US9649738B2 (en) 2012-11-29 2017-05-16 Oy Kwh Mirka Ab Arrangement and method for grinding spherical products
CN109689306A (zh) * 2016-09-28 2019-04-26 喜利得股份公司 用于研磨设备的防尘罩
CN112388468A (zh) * 2019-08-16 2021-02-23 博世电动工具（中国）有限公司 手持式工具机
GB2590684A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5998331B2 (ja) * 2012-07-31 2016-09-28 極東産機株式会社 内装施工用パテ研削工具
EP3812089A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1085064B (de) * 1959-03-23 1960-07-07 Gustav Albrecht Schutz- und Absaugehaube fuer Schleif- und Poliermaschinen
US4697389A (en) * 1986-05-13 1987-10-06 Romine Richard A Dust-confining vacuum sander
RU2011505C1 (ru) * 1990-04-09 1994-04-30 Олег Николаевич Антонов Ограждение торцевого обрабатывающего инструмента
US6027399A (en) * 1998-02-27 2000-02-22 Stewart; Kerry Clean grinding system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007013705U1 (de) * 2007-10-01 2009-02-19 Mafell Ag Bearbeitungswerkzeug
CN102717312A (zh) * 2012-07-19 2012-10-10 倪玉萍 一种适合在任意阴角处使用的新型无尘打磨机
US9649738B2 (en) 2012-11-29 2017-05-16 Oy Kwh Mirka Ab Arrangement and method for grinding spherical products
US9505472B2 (en) 2013-06-13 2016-11-29 Dg-Diving Group Ltd. Apparatus and method for treating an underwater surface
CN109689306A (zh) * 2016-09-28 2019-04-26 喜利得股份公司 用于研磨设备的防尘罩
CN109689306B (zh) * 2016-09-28 2022-05-13 喜利得股份公司 用于研磨设备的防尘罩
CN112388468A (zh) * 2019-08-16 2021-02-23 博世电动工具（中国）有限公司 手持式工具机
CN112388468B (zh) * 2019-08-16 2022-12-13 博世电动工具（中国）有限公司 手持式工具机
GB2590684A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

Also Published As

Publication number Publication date
DE10028128A1 (de) 2001-12-13
DE50113160D1 (de) 2007-12-06
EP1162032A3 (fr) 2003-10-22
JP2002018693A (ja) 2002-01-22
EP1162032B1 (fr) 2007-10-24

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