US3849088A - Safety hood for grinding discs - Google Patents

Safety hood for grinding discs Download PDF

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Publication number
US3849088A
US3849088A US00332421A US33242173A US3849088A US 3849088 A US3849088 A US 3849088A US 00332421 A US00332421 A US 00332421A US 33242173 A US33242173 A US 33242173A US 3849088 A US3849088 A US 3849088A
Authority
US
United States
Prior art keywords
opening
grinding disc
grinding
safety hood
spindle nose
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.)
Expired - Lifetime
Application number
US00332421A
Other languages
English (en)
Inventor
B Johansson
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.)
Centro Maskin I Goteborg AB
Original Assignee
Centro Maskin I Goteborg AB
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 Centro Maskin I Goteborg AB filed Critical Centro Maskin I Goteborg AB
Application granted granted Critical
Publication of US3849088A publication Critical patent/US3849088A/en
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

Definitions

  • ABSTRACT A safety hood for grinding discs detachably mounted on a driver spindle including means detachably supporting said discs which means includes a projection which normally closes an opening in said hood through which said means and grinding wheel can be attached or detached from said. driver spindle and which hood is supported by a bearing box for said spindle.
  • the present invention relates to a safety hood for grinding discs.
  • safety hoods for grinding discs must fulfill the requirement of a sufficiently enclosed design, so that in case of an eventual bursting of the disc, pieces of the same cannot be flung in such directions that serious injuries are caused.
  • safety hoods for such discs which are intended to grind with their periphery, are permitted to be open at the periphery only at the side, where the grinding discs contacts the work piece, and any opening in axially sidewise direction is not permitted.
  • accessibility from the side is required in order to make it possible to release and remove the washer holding the grinding disc enabling the grinding disc to be pulled off from the spindle nose on which it is mounted.
  • Safety hood of said type therefore have been equipped with a lateral shutter which can be opened.
  • such a shutter means causes additional manufacturing cost and also a safety risk, if the shutter should not be carefully locked after being closed.
  • FIGURE of the drawing illustrates the device in a cross section extending in an axial plane.
  • a bearing box 1 with a rotatable shaft exhibiting a conical pivot 2 journalled therein is illustrated, said bearing box being mounted on a machine frame not shown.
  • a sleeve is attached, exhibiting a first guide 3 and a second guide 4 passing on into a flange 5.
  • a flange sleeve 6 with an inner guide 7 fits to the guide 3.
  • the flange sleeve 6 exhibits further an outer guide 8 of the same diameter as the guide 4, a flange 9 of a design similar to the flange 5, and a tubular projection 10 opposed to the guide 8 and departing from the flange 9.
  • the sleeve 3, 4, and the flange sleeve 6 can be tightly contracted by means of a annularly arranged set of screws 11.
  • the sleeve 3, 4, 5 is kept in place on the pivot 2 by means of a shaft nut 12.
  • a safety hood 13 is attached to the bearing box 1 and comprises two end pieces 14 and 15 and a cylindrical jacket 16.
  • the mantle piece 16 is bent in U-shape, its rounded upper portion having its centre in common with the centre of the shaft of the grinding disc, as is evident from the FlGURE.
  • the end laterals 14, 15 at their outer edges fit to this shape, while at their centre they exhibit openings, at the end lateral 14 an opening 17, which is adapted to the bearing box 1 and at its edge fastened thereto by means of a weld.
  • the grinding disc 19 is thread on the guides 4, 8 and is squeezed between the flanges 5 and 9 by tightening of the bolts 11. ll-lereby at the rotation of the sleeves together with the shaft 2 the grinding disc 19 by friction is also brought in rotation.
  • the grinding disc 19 is well enclosed by the bursting safeguard 13, which is open at the side only, in the drawing in downwards direction, where the work piece is positioned, which at this side serves the purpose of a kind of safeguard.
  • the lateral opening 18 of the end lateral 15 of the bursting safeguard 13 is covered by the projection 10 of the flange sleeve 6 in such a way that no pieces loosened by a burst can be flung out.
  • the bursting safeguard 13 has such a width that the grinding disc to be used can be introduced into the same outside of the spindle nose and up onto its provided guide.
  • the fastening devices for the grinding disc, the flange sleeve 6 and the bolts 11 are accessible and removable from the outside, and in spite of the bursting safeguard being provided with a sufficiently great opening for this purpose, this opening does not involve any risk of pieces loosened by the burst being flung out through the same, because of in mounted position of the grinding disc it is covered by the projection 10 on the flange sleeve 6.
  • the projection at the same time divides the portion of the lower opening of the bursting safeguard, which is outside the grinding disc and which must have at least the same width as this one in order to permit the mounting described, into two relatively small passages. Also this contributes to a lessening of the risk of bursted pieces being flung out.
  • the opening 18 does not necessarily have to extend until the edge of the wall 15, but it can be a round opening, straight through which the flange sleeve 6 is carried.
  • the opening 18 then must have a diameter corresponding the diameter of the flange 9 and also the projection 10 shall be designed with this diameter.
  • a grinding disc safety device comprising a grinding disc, which is intended for grinding with its peripherical part, a driven spindle nose, a flange piece being-detachpiece having a cylindrical projection, the outer diameter of which closely fits to the edges of said second opening, and the outer end of which closely fits to said side wall of said safety hood, said side wall being at a distance from the end of said spindle nose, which is at least as great as the width of said grinding disc, so that said grinding disc can be introduced into said safety hood through said first mentioned opening out side of said spindle nose in order to be mounted on the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US00332421A 1972-02-14 1973-02-14 Safety hood for grinding discs Expired - Lifetime US3849088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE01745/72A SE360590B (xx) 1972-02-14 1972-02-14

Publications (1)

Publication Number Publication Date
US3849088A true US3849088A (en) 1974-11-19

Family

ID=20258763

Family Applications (1)

Application Number Title Priority Date Filing Date
US00332421A Expired - Lifetime US3849088A (en) 1972-02-14 1973-02-14 Safety hood for grinding discs

Country Status (8)

Country Link
US (1) US3849088A (xx)
JP (1) JPS4889475A (xx)
CA (1) CA977153A (xx)
DE (1) DE2307074C3 (xx)
FR (1) FR2172698A5 (xx)
GB (1) GB1375804A (xx)
IT (1) IT979087B (xx)
SE (1) SE360590B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905424A (en) * 1986-10-22 1990-03-06 Kioritz Corporation Rotary tool cover
US5545082A (en) * 1994-05-02 1996-08-13 Courson; Michael W. Dust control system for rotary hand tools

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012106188B4 (de) * 2012-07-10 2021-05-20 Rhodius Schleifwerkzeuge Gmbh & Co. Kg Verfahren zum Demontieren und Verfahren zum Montieren eines Schneidwerkzeugs einer Werkzeuganordnung zum Herstellen von Wandschlitzen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247621A (en) * 1963-12-05 1966-04-26 Sheffield Corp Machine assembly
US3498004A (en) * 1965-07-22 1970-03-03 Carborundum Co Grinding machines
US3606707A (en) * 1968-01-18 1971-09-21 Husqvarna Vapenfabriks Ab Arrangement at an engine chain saw for mounting a circular cutting tool to the frame of chain saw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247621A (en) * 1963-12-05 1966-04-26 Sheffield Corp Machine assembly
US3498004A (en) * 1965-07-22 1970-03-03 Carborundum Co Grinding machines
US3606707A (en) * 1968-01-18 1971-09-21 Husqvarna Vapenfabriks Ab Arrangement at an engine chain saw for mounting a circular cutting tool to the frame of chain saw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905424A (en) * 1986-10-22 1990-03-06 Kioritz Corporation Rotary tool cover
US5545082A (en) * 1994-05-02 1996-08-13 Courson; Michael W. Dust control system for rotary hand tools

Also Published As

Publication number Publication date
GB1375804A (xx) 1974-11-27
JPS4889475A (xx) 1973-11-22
SE360590B (xx) 1973-10-01
DE2307074C3 (de) 1978-07-13
DE2307074B2 (de) 1977-11-17
IT979087B (it) 1974-09-30
FR2172698A5 (xx) 1973-09-28
DE2307074A1 (de) 1973-08-23
CA977153A (en) 1975-11-04

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