WO2013029063A1 - Meuleuse d'angle améliorée - Google Patents

Meuleuse d'angle améliorée Download PDF

Info

Publication number
WO2013029063A1
WO2013029063A1 PCT/ZA2012/000049 ZA2012000049W WO2013029063A1 WO 2013029063 A1 WO2013029063 A1 WO 2013029063A1 ZA 2012000049 W ZA2012000049 W ZA 2012000049W WO 2013029063 A1 WO2013029063 A1 WO 2013029063A1
Authority
WO
WIPO (PCT)
Prior art keywords
power tool
attachment
tool attachment
nose
shaft
Prior art date
Application number
PCT/ZA2012/000049
Other languages
English (en)
Inventor
Brett Michael MORRISON
Original Assignee
Morrison Brett Michael
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 Morrison Brett Michael filed Critical Morrison Brett Michael
Publication of WO2013029063A1 publication Critical patent/WO2013029063A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/048—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with a plurality of saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • B23D45/165—Hand-held sawing devices with circular saw blades with a plurality of saw blades or saw blades having plural cutting zones
    • 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation
    • B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting

Definitions

  • This invention relates to an improved angle grinder. BACKGROUND ART
  • An angle grinder is a hand held power tool having a rapidly rotating abrasive cutting or grinding disk, for use in cutting, grinding or polishing metal or masonry.
  • Angle grinders are widely used in metalworking and construction and may be used both for removing excess material from or simply cutting into a piece of masonry, or other materials.
  • the discs which come in a variety of hardnesses, grits, and materials, wear down with use and can be replaced as needed.
  • Angle grinders are commonly used in the construction industry for chasing grooves into walls or like surfaces, to allow for electrical cables, electrical conduit and plumbing pipes or any other product requiring concealment, to be concealed therein. However, in most instances at least 2 parallel grooves are required to be chased into a wall, and the central portion needs to be removed, in order to provide chasing which is sufficiently wide.
  • Chasing tools are known in the art and generally comprise an angle grinder having two parallel grinding blades located to one side of the nose of the grinder, within a single fixed guard.
  • the grinding blades of these tools are small by necessity to ensure that the tool remains balanced and as such are limited in the depth to which they can grind and the width of the groove that they are able to chase.
  • a power tool attachment for use in cutting grooves in masonry, the attachment comprising an elongated nose, securable to the body of a power tool, the nose including a rotatable shaft locatable through its front end and a pair of rotatable cutting discs removably securable onto the shaft.
  • cutting disks are further provided for the cutting disks to be securable onto the shaft either on the same or opposite sides of the nose.
  • the cutting disks are securable to opposite sides of the nose.
  • a rotating bevel gear or other means for rotating the shaft may be located in the main body of the power tool, the rotating bevel gear may engage with the shaft located in the nose to drive rotation of the shaft.
  • the bevel gear, and subsequently the rotation of the shaft may be driven by an electric motor housed either within or externally to the body of the power tool and powered by a standard power source, alternatively powered by a combustion engine.
  • the power tool attachment may additionally include means for limiting the depth of the grooves that the cutting discs may cut.
  • the limiting means may include a surface- engaging roller locatable on the nose. The location of the roller along the nose may be altered depending on the function that the attachment is required to perform.
  • the limiting means may additionally include a housing locatable around at least a portion of each cutting disk.
  • the housing may also act as a safety guard, for preventing unauthorised contact with the cutting discs.
  • the power tool attachment may further include means for adjusting the distance between the two discs, the adjustment means including removable spacers locatable on the shaft, adjacent the nose.
  • the means for removably securing the cutting discs on the shaft may include a threaded nut or clamping screw.
  • the two cutting discs are preferably the same size.
  • the body of the power tool may additionally include one or more handles by which the tool may be carried, and which may be used to guide the tool in use.
  • the attachment may be incorporated into the body of the power tool as a universal integral part.
  • the attachment and the body may be formed as a single moulded unit, and the attachment is not required to be bolted onto the body of the power tool.
  • the power tool is preferably an angle grinder.
  • Figure 1 is a representation of the power tool attachment
  • Figure 2 is a representation of a hand held power tool in which the attachment forms an integral part of the power tool
  • Figure 3 is an exploded view of the hand held power tool of the power tool of figure 3.
  • FIG. 1 illustrates an attachment 40 for an angle grinder 10.
  • the attachment 40 includes a nose 14, through which a shaft 16 is locatable, and a pair of cutting discs 18 securable on the shaft 16 to either side of the nose 14.
  • the cutting discs 18 are secured to the shaft 16 by a threaded nut, or clamping screw 19.
  • the cutting discs 18 are of equal diameter and size.
  • the attachment 40 is connectable to the body 12 of the angle grinder 10 by screws or bolts 42.
  • the nose 14 is adapted to receive a bevel gear 44, extending from the body 12 of the angle grinder 10.
  • the bevel gear 44 engages with the shaft 16, to rotate the shaft and subsequently the cutting disks 18.
  • a surface-engaging roller 20 is located at the front of the nose 14.
  • the roller 20 assists in guiding the angle grinder along the intended path, and also assists in limiting the depth to which the cutting discs may cut into the relevant surface.
  • a housing 22 surrounds at least a portion of each cutting disk 18, and acts as a safety guard, preventing accidental contact with the discs 18, as well as assisting in limiting the depth to which the discs 18 may cut. (It is envisaged the amount by which the discs 18 extend beyond the housing may be adjusted).
  • Spacers such as washers (not shown), may be located on the shaft 16, adjacent the nose 14, prior to the addition of the discs 18.
  • the spacers increase the distance between the two discs 18, and the width of the spacers will determine the width of the groove to be cut in the relevant surface. Where necessary, the spacers may be removed completely.
  • a handle 24, is located on the body 12 of the angle grinder 10, and may be used to guide the path of the grinder 10, as well as to carry the grinder.
  • the angle grinder will be driven by an electric motor, housed within the body 12 of the angle grinder, and powered by a standard electrical power source. Where a standard electrical power source is not available, a combustion engine may be employed to drive the grinder.
  • the angle grinder 10 includes the modified nose 14 as an integral part of the body 12.
  • the angle grinder is manufactured as a single unit, incorporating the nose 14. All other features of the angle grinder are the same as those referred to in Figure 1 , and are indicated by like numerals.
  • the cutting discs include diamond tipped cutting discs, commonly used for cutting into masonry. Other discs may be used where relevant.
  • the grinder 10 is brought into contact with a wall, or other surface in which it is desired to cut a set of parallel grooves.
  • the motor is activated, which in turns causes the discs 18 to rotate at high speed.
  • the grinder is pushed down into the wall surface, until the roller 20 makes contact with the wall.
  • the grinder is then pulled along the wall in the direction of the cut to be made, the discs 18 causing two parallel cuts to be made in the masonry surface. Once the required cut is made, the grinder 10 is turned off, and the material remaining between the two parallel cuts can be cleared using a chisel or other relevant tool.
  • the invention therefore provides an attachment for an angle grinder and a novel angle grinder for chasing parallel grooves in masonry and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

La présente invention concerne un accessoire (40) pour un outil électrique (10) destiné à être utilisé pour ménager des rainures dans de la maçonnerie, ledit accessoire (40) comportant un élément allongé (14) par la face avant duquel un arbre (16) peut être introduit, et une paire de disques de coupe rotatifs (18) pouvant être fixés sur l'axe (16). L'élément (14) peut être fixé sur le corps principal (12) de l'outil électrique (10) qui comporte des moyens permettant de faire tourner l'axe (16).
PCT/ZA2012/000049 2011-07-19 2012-07-18 Meuleuse d'angle améliorée WO2013029063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2011/05300 2011-07-19
ZA201105300 2011-07-19

Publications (1)

Publication Number Publication Date
WO2013029063A1 true WO2013029063A1 (fr) 2013-02-28

Family

ID=47746932

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2012/000049 WO2013029063A1 (fr) 2011-07-19 2012-07-18 Meuleuse d'angle améliorée

Country Status (1)

Country Link
WO (1) WO2013029063A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013101420U1 (de) * 2013-04-03 2014-07-04 Makita Corporation Trennschleifer
CN105252391A (zh) * 2015-11-06 2016-01-20 优利康达（天津）科技有限公司 一种玻璃纤维新型手持裁切机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848087C (de) * 1950-10-21 1952-09-01 Alfred Dr Fraas Mauerfraese
FR1292700A (fr) * 1961-06-21 1962-05-04 Appareil pour le creusage de saignées dans des murs ou cloisons
FR81596E (fr) * 1962-05-10 1963-10-11 Appareil pour le creusage de saignées dans des murs ou cloisons
US5020280A (en) * 1989-08-11 1991-06-04 Oreilly Gerard Grinding tool and spacer assembly for use therein
US6139477A (en) * 1997-08-18 2000-10-31 Bechem; Ulrich Process for producing slots, grooves, and planar excavations
US7143759B1 (en) * 2006-05-22 2006-12-05 Fu-Chun Wang Slotter provided with simultaneously two-way rotary saw blades

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848087C (de) * 1950-10-21 1952-09-01 Alfred Dr Fraas Mauerfraese
FR1292700A (fr) * 1961-06-21 1962-05-04 Appareil pour le creusage de saignées dans des murs ou cloisons
FR81596E (fr) * 1962-05-10 1963-10-11 Appareil pour le creusage de saignées dans des murs ou cloisons
US5020280A (en) * 1989-08-11 1991-06-04 Oreilly Gerard Grinding tool and spacer assembly for use therein
US6139477A (en) * 1997-08-18 2000-10-31 Bechem; Ulrich Process for producing slots, grooves, and planar excavations
US7143759B1 (en) * 2006-05-22 2006-12-05 Fu-Chun Wang Slotter provided with simultaneously two-way rotary saw blades

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013101420U1 (de) * 2013-04-03 2014-07-04 Makita Corporation Trennschleifer
US9227291B2 (en) 2013-04-03 2016-01-05 Makita Corporation Angle grinder
CN105252391A (zh) * 2015-11-06 2016-01-20 优利康达（天津）科技有限公司 一种玻璃纤维新型手持裁切机

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