US20110086582A1 - Mounting device for disk-shaped rotating tool - Google Patents

Mounting device for disk-shaped rotating tool Download PDF

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Publication number
US20110086582A1
US20110086582A1 US12/797,677 US79767710A US2011086582A1 US 20110086582 A1 US20110086582 A1 US 20110086582A1 US 79767710 A US79767710 A US 79767710A US 2011086582 A1 US2011086582 A1 US 2011086582A1
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US
United States
Prior art keywords
disk
shaped rotating
rotating tool
holding member
annular retaining
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.)
Abandoned
Application number
US12/797,677
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English (en)
Inventor
Sokichi Takemura
Akihiko Nakagawa
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.)
Tenryu Seikyo KK
Original Assignee
Tenryu Seikyo KK
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 Tenryu Seikyo KK filed Critical Tenryu Seikyo KK
Assigned to TENRYU SEIKYO KABUSHIKI KAISHA reassignment TENRYU SEIKYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKAGAWA, AKIHIKO, TAKEMURA, SOKICHI
Publication of US20110086582A1 publication Critical patent/US20110086582A1/en
Abandoned 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
    • 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
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings
    • 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
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle

Definitions

  • the present invention relates to a device for mounting a disk-shaped rotating tool such as a grinding disk and a circular saw to an output shaft of an electric rotary machine in the condition that the tool is held from both sides thereof under elastic pressure.
  • a grinding disk mounted on an output shaft of an electric rotary machine is used for leveling of the plane surface of a concrete, building material, and stone material, etc. or for any other various operations such as chamfering, repairing of a building wall surface, and removing of a painted surface.
  • a large impact is applied to an operator.
  • such a large impact is directly transmitted to the operator, making the operations difficult and having a physically adverse effect on the operator due to vibrations.
  • Japanese Patent No. 3032530 has proposed a mounting structure such that a grinding disk is mounted through a shock absorbing ring having a cushion member to an output shaft of an electric rotary machine.
  • this mounting structure the vibrations of the grinding disk during the operation are reduced by the cushion member and transmitted to the electric rotary machine, so that the burden on the operator due to the vibrations can be reduced.
  • annular groove for retaining the cushion member is formed on the shock absorbing ring having a small diameter. Accordingly, the formation of the annular groove is difficult and the rigidity of the shock absorbing ring is reduced by the formation of the annular groove.
  • the disk-shaped rotating tool has a second annular retaining groove formed on another surface opposite to the surface opposed to the electric rotary machine; the device further including a second ring-like cushioning member fitted in the second annular retaining groove and pressed on the disk-shaped rotating tool by the first holding member.
  • the first and second annular retaining grooves are formed by corrugating the inner circumferential portion of the disk-shaped rotating tool.
  • the output shaft has a seating surface formed at the base end portion thereof and a screw shaft extending axially outside from the seating surface;
  • the first holding member has a cylindrical portion having an inner circumference formed with an internally threaded portion engaged with the screw shaft and an outer circumference formed with an externally threaded portion near one end surface abutting against the seating surface of the output shaft, the outer circumference of the cylindrical portion being integrally formed with an engaging projection for relatively nonrotatably engaging the inner circumferential portion of the disk-shaped rotating tool;
  • the second holding member has an inner circumference formed with an internally threaded portion engaged with the externally threaded portion of the cylindrical portion of the first holding member.
  • FIG. 1 is a vertical sectional view of a first preferred embodiment of the present invention
  • FIG. 2 is a cross section taken along the line II-II in FIG. 1 ;
  • FIG. 3 is a vertical sectional view of a second preferred embodiment of the present invention.
  • FIG. 4 is a vertical sectional view showing an essential part of a third preferred embodiment of the present invention.
  • FIG. 1 there is shown a first preferred embodiment of the present invention, wherein reference numeral 10 denotes a case of an electric rotary machine such as a disk grinder.
  • An output shaft 11 of the electric rotary machine projects from the case 10 .
  • the base end portion of the output shaft 11 is stepped to form a seating surface 11 a , and a small-diameter screw shaft 12 projects from the seating surface 11 a.
  • the present invention provides a device for mounting a disk-shaped rotating tool 15 such as a grinding disk through a pair of first and second holding members 21 and 28 to the output shaft 11 of the electric rotary machine.
  • the disk-shaped rotating tool 15 is provided by a grinding disk.
  • the grinding disk 15 is composed of a base plate 16 formed from a steel plate and super-hard abrasive grains fixed to the outer surface (right side surface) of the outer circumferential portion of the base plate 16 . This outer circumferential portion of the base plate 16 to which the abrasive grains are fixed is formed as a grinding surface 17 .
  • the inner circumferential portion of the base plate 16 is bent toward the inside (left side) of the electric rotary machine so as to form a trapezoidal cross section as shown in FIG. 1 .
  • the top surface of this trapezoidal inner circumferential portion of the base plate 16 is formed as an inner circumferential wall 16 a .
  • the inner circumferential wall 16 a is corrugated by a press to form a first annular retaining groove 18 a and a second annular retaining groove 18 b .
  • the first annular retaining groove 18 a has a depth such that a first ringlike cushioning member 30 a formed from an O ring is fitted in the groove 18 a so as to be exposed therefrom.
  • the second annular retaining groove 18 b has a depth such that a second ringlike cushioning member 30 b formed from an 0 ring is fitted in the groove 18 b so as to be exposed therefrom.
  • the inner circumferential portion of the base plate 16 is formed with a spline-shaped center hole 19 .
  • the inner circumferential wall 16 a of the base plate 16 is corrugated at one radial position.
  • FIG. 3 shows a second preferred embodiment of the present invention, wherein the inner circumferential wall 16 a of the base plate 16 is corrugated at two radial positions radially spaced a predetermined amount to form a first annular retaining groove 18 a having a large diameter on the left side surface of the inner circumferential wall 16 a and a second annular retaining groove 18 b having a small diameter on the right side surface of the inner circumferential wall 16 a.
  • Both of the first holding member 21 and the second holding member 28 are formed of metal such as stainless steel.
  • the first holding member 21 has a large-diameter flange portion 22 and a cylindrical portion 23 formed integrally with the flange portion 22 and projecting leftward therefrom.
  • the flange portion 22 has a diameter corresponding to the diameter of the outer side surface (right side surface) of the inner circumferential wall 16 a of the base plate 16 .
  • the outer side surface (right side surface) of the flange portion 22 is formed with four operation holes 22 a for engagement of an operation tool (not shown), wherein these four operation holes 22 a are spaced from each other in the circumferential direction of the flange portion 22 .
  • the outer circumference of the base portion (right portion) of the cylindrical portion 23 is formed with three engaging projections 24 as spline teeth adapted to engage the spline grooves of the center hole 19 of the grinding disk 15 .
  • the axial length of each engaging projection 24 is preferably set slightly larger than the axial width of the inner circumferential wall 16 a of the grinding disk 15 .
  • the outer circumference of the left portion of the cylindrical portion 23 is formed with an externally threaded portion 25 axially adjacent to the engaging projections 24 .
  • the second holding member 28 has a diameter corresponding to the diameter of the inner side surface (left side surface) of the inner circumferential wall 16 a of the base plate 16 .
  • the inner circumference of the second holding member 28 is formed with an internally threaded portion 28 a adapted to engage the externally threaded portion 25 of the cylindrical portion 23 of the first holding member 21 .
  • the end of the second holding member 28 is formed with a tool engaging portion 28 b having opposite flat surfaces for engaging a tool such as a wrench.
  • the operation of the mounting device according to the first preferred embodiment mentioned above will now be described.
  • the first ringlike cushioning member 30 a and the second ringlike cushioning member 30 b are respectively fitted into or opposed to the first annular retaining groove 18 a and the second annular retaining groove 18 b of the inner circumferential wall 16 a of the grinding disk 15 .
  • the cylindrical portion 23 of the first holding member 21 is inserted through the center hole 19 of the grinding disk 15 so that the engaging projections 24 of the cylindrical portion 23 come into engagement with the spline grooves of the center hole 19 .
  • the internally threaded portion 28 a of the second holding member 28 is engaged with the externally threaded portion 25 of the first holding member 21 until the right side surface (outer side surface) of the second holding member 28 comes into pressure contact with the left side surface of each engaging projection 24 .
  • the first ringlike cushioning member 30 a and the second ringlike cushioning member 30 b are respectively pressed against the left side surface and right side surface of the inner circumferential wall 16 a of the grinding disk 15 by the first holding member 21 and the second holding member 28 , and these cushioning members 30 a and 30 b are elastically deformed by a predetermined amount.
  • the grinding disk 15 and the first and second holding members 21 and 28 are assembled as a unit in the condition where the grinding disk 15 is sandwiched under pressure by the first and second ringlike cushioning members 30 a and 30 b .
  • the cylindrical portion 23 of the first holding member 21 is threadedly engaged with the output shaft 11 of the electric rotary machine until the left end surface of the cylindrical portion 23 comes into abutment against the seating surface 11 a of the output shaft 11 .
  • the grinding disk 15 can be mounted quickly and accurately to the output shaft 11 of the electric rotary machine.
  • FIG. 4 there is shown a vertical sectional view of an essential part showing a third preferred embodiment of the present invention.
  • an inner circumferential wall 16 a of a base plate 16 of a grinding disk 15 is held by a first holding member 21 and a second holding member 28 .
  • a part of the inner circumferential wall 16 a is annularly removed to form a first annular retaining groove 18 a on the left side surface of the inner circumferential wall 16 a of the base plate 16
  • a part of the flange portion 22 of the first holding member 21 is annularly removed to form a second annular retaining groove 22 b on the left side surface of the flange portion 22 .
  • a first ringlike cushioning member 30 a is engaged with the first annular retaining groove 18 a
  • a second ring-like cushioning member 30 b is engaged with the second annular retaining groove 22 b .
  • all of the first annular retaining groove 18 a , the second annular retaining groove 22 b , the first ring-like cushioning member 30 a , and the second ringlike cushioning member 30 b have the same diameter.
  • the first ringlike cushioning member 30 a is engaged into the first annular retaining groove 18 a of the inner circumferential wall 16 a of the grinding disk 15 so as to be partially exposed
  • the second ringlike cushioning member 30 b is engaged into the second annular retaining groove 22 b formed on the left side surface of the flange portion 22 of the first holding member 21 so as to be partially exposed.
  • the cylindrical portion 23 of the first holding member 21 is inserted through the center hole 19 of the grinding disk 15 so that the engaging projections 24 of the cylindrical portion 23 come into engagement with the spline grooves of the center hole 19 .
  • the internally threaded portion 28 a of the second holding member 28 is engaged with the externally threaded portion 25 of the first holding member 21 until the right side surface (outer side surface) of the second holding member 28 comes into pressure contact with the left side surface of each engaging projection 24 .
  • the grinding disk 15 and the first and second holding members 21 and 28 are assembled as a unit in the condition where the grinding disk 15 is sandwiched under pressure by the first and second ring-like cushioning members 30 a and 30 b . Thereafter, the cylindrical portion 23 of the first holding member 21 is threadedly engaged with the output shaft 11 of the electric rotary machine. In this manner, the grinding disk 15 can be mounted quickly and accurately to the output shaft of the electric rotary machine.
  • the first holding member 21 may be mounted to the grinding disk 15 so that the flange portion 22 is located on the left side of the grinding disk 15 and the cylindrical portion 23 is engaged into the center hole 19 from the left side of the grinding disk 15 .
  • the second holding member 28 may be provided on the right side of the grinding disk 15 so as to engage with the externally threaded portion 25 of the cylindrical portion 23 of the first holding member 21 .
  • the second ringlike cushioning member 30 b may be omitted to use only the first ring-like cushioning member 30 a.
US12/797,677 2009-10-09 2010-06-10 Mounting device for disk-shaped rotating tool Abandoned US20110086582A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009235550A JP2011079113A (ja) 2009-10-09 2009-10-09 円板状回転工具の取付け装置
JP2009-235550 2009-10-09

Publications (1)

Publication Number Publication Date
US20110086582A1 true US20110086582A1 (en) 2011-04-14

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US12/797,677 Abandoned US20110086582A1 (en) 2009-10-09 2010-06-10 Mounting device for disk-shaped rotating tool

Country Status (3)

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US (1) US20110086582A1 (ja)
JP (1) JP2011079113A (ja)
DE (1) DE102010031342A1 (ja)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2497616A1 (en) * 2011-03-10 2012-09-12 Black & Decker Inc. Oscillating power tool
US8915499B2 (en) 2010-11-09 2014-12-23 Black & Decker Inc. Universal accessories for oscillating power tools
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
US20160288288A1 (en) * 2013-08-01 2016-10-06 C. & E. Fein Gmbh Tool device
WO2017013259A1 (de) * 2015-07-22 2017-01-26 Lukas-Erzett Vereinigte Schleif- Und Fräswerkzeugfabriken Gmbh & Co. Kg Schleifscheibe mit einem vlies-stützteller
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10052695B2 (en) 2013-08-01 2018-08-21 C. & E. Fein Gmbh Power tool
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
US10144110B2 (en) 2012-02-03 2018-12-04 Makita Corporation Work tool
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
US10471518B2 (en) 2013-08-01 2019-11-12 C. & E. Fein Gmbh Machine tool with tool-accommodating device
US11045939B2 (en) 2018-03-28 2021-06-29 Makita Corporation Power tool
US11364545B2 (en) 2019-12-26 2022-06-21 Makita Corporation Power tool
US11590593B2 (en) 2019-11-28 2023-02-28 Makita Corporation Power tool
US11660690B2 (en) 2019-11-28 2023-05-30 Makita Corporation Power tool
US11772171B2 (en) 2020-02-13 2023-10-03 Makita Corporation Power tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017213669A1 (de) * 2016-08-22 2018-02-22 Robert Bosch Gmbh Werkzeugeinrichtung für eine Handwerkzeugmaschine

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Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10124461B2 (en) 2010-04-29 2018-11-13 Black & Decker Inc. Oscillating tool
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
US10040186B2 (en) 2010-04-29 2018-08-07 Black & Decker Inc. Universal accessories for oscillating power tools
US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US10207385B2 (en) 2010-04-29 2019-02-19 Black & Decker Inc. Accessories for oscillating power tools
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
US9242361B2 (en) 2010-04-29 2016-01-26 Black & Decker Inc. Universal accessories for oscillating power tools
US11097396B2 (en) 2010-04-29 2021-08-24 Black & Decker Inc. Accessories for oscillating power tools
US11498180B2 (en) 2010-04-29 2022-11-15 Black & Decker Inc. Oscillating tool
US11045919B2 (en) 2010-04-29 2021-06-29 Black & Decker Inc. Power tool
US9539647B2 (en) 2010-04-29 2017-01-10 Black & Decker Inc. Oscillating tool
US8915499B2 (en) 2010-11-09 2014-12-23 Black & Decker Inc. Universal accessories for oscillating power tools
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
EP2497616A1 (en) * 2011-03-10 2012-09-12 Black & Decker Inc. Oscillating power tool
US10144110B2 (en) 2012-02-03 2018-12-04 Makita Corporation Work tool
USD873099S1 (en) 2012-07-16 2020-01-21 Black & Decker Inc. Oscillating saw blade
US11235452B2 (en) 2012-07-16 2022-02-01 Black & Decker Inc. Accessories for oscillating power tools
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
US10792801B2 (en) 2012-07-16 2020-10-06 Black & Decker Inc. Oscillating power tools and accessories
US10245716B2 (en) 2012-07-16 2019-04-02 Black & Decker Inc. Universal accessories for oscillating power tools
USD884444S1 (en) 2012-07-16 2020-05-19 Black & Decker Inc. Oscillating saw blade
USD856766S1 (en) 2012-07-16 2019-08-20 Black & Decker Inc. Oscillating saw blade
US20160288288A1 (en) * 2013-08-01 2016-10-06 C. & E. Fein Gmbh Tool device
US10471518B2 (en) 2013-08-01 2019-11-12 C. & E. Fein Gmbh Machine tool with tool-accommodating device
US11590584B2 (en) 2013-08-01 2023-02-28 C. & E. Fein Gmbh Tool device
US10065248B2 (en) * 2013-08-01 2018-09-04 C. & E. Fein Gmbh Tool device
US10052695B2 (en) 2013-08-01 2018-08-21 C. & E. Fein Gmbh Power tool
US10807170B2 (en) 2013-08-01 2020-10-20 C. & E. Fein Gmbh Tool device
US10967435B2 (en) 2013-08-01 2021-04-06 C. & E. Fein Gmbh Power tool
WO2017013259A1 (de) * 2015-07-22 2017-01-26 Lukas-Erzett Vereinigte Schleif- Und Fräswerkzeugfabriken Gmbh & Co. Kg Schleifscheibe mit einem vlies-stützteller
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
USD924030S1 (en) 2017-01-16 2021-07-06 Black & Decker Inc. Blade for oscillating power tools
US10702927B2 (en) 2017-01-16 2020-07-07 Black & Decker Inc. Accessories for oscillating power tools
USD871185S1 (en) 2017-01-16 2019-12-31 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
US11045939B2 (en) 2018-03-28 2021-06-29 Makita Corporation Power tool
US11590593B2 (en) 2019-11-28 2023-02-28 Makita Corporation Power tool
US11660690B2 (en) 2019-11-28 2023-05-30 Makita Corporation Power tool
US11364545B2 (en) 2019-12-26 2022-06-21 Makita Corporation Power tool
US11772171B2 (en) 2020-02-13 2023-10-03 Makita Corporation Power tool

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Publication number Publication date
JP2011079113A (ja) 2011-04-21
DE102010031342A1 (de) 2011-04-14

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Owner name: TENRYU SEIKYO KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKEMURA, SOKICHI;NAKAGAWA, AKIHIKO;REEL/FRAME:024513/0954

Effective date: 20100601

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION