WO2010120322A1 - Outil électrique comprenant une fixation à vide - Google Patents

Outil électrique comprenant une fixation à vide Download PDF

Info

Publication number
WO2010120322A1
WO2010120322A1 PCT/US2009/052798 US2009052798W WO2010120322A1 WO 2010120322 A1 WO2010120322 A1 WO 2010120322A1 US 2009052798 W US2009052798 W US 2009052798W WO 2010120322 A1 WO2010120322 A1 WO 2010120322A1
Authority
WO
WIPO (PCT)
Prior art keywords
power tool
housing
vacuum attachment
output shaft
blade
Prior art date
Application number
PCT/US2009/052798
Other languages
English (en)
Inventor
David Elsea
David M. Smith
Ernest C. Bostic
James Morgan
Original Assignee
Techtronic Power Tools Technology Limited
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 Techtronic Power Tools Technology Limited filed Critical Techtronic Power Tools Technology Limited
Publication of WO2010120322A1 publication Critical patent/WO2010120322A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/0046—Devices for removing chips by sucking
    • 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
    • B24B55/06—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

  • the present invention relates to power tools, and more particularly to power tools including vacuum attachments.
  • Cast saws are power tools designed to cut through plaster, fiberglass, or plastic casts to remove the casts from an individual's body. Some cast saws incorporate a vacuum duct in the housing of the saw that is attached to an extraction system for removing dust or debris from the cast as it is being cut.
  • the present invention provides, in one aspect, a power tool including a housing defining a cavity, a motor supported by the housing in the cavity, an output shaft extending from the housing and operably coupled to the motor, and a vacuum attachment removably coupled to the housing.
  • the vacuum attachment includes an inlet positioned adjacent and in facing relationship with the output shaft, an outlet, and a passageway fluidly communicating the inlet and the outlet. The passageway is fluidly isolated from the cavity.
  • the present invention provides, in another aspect, a power tool assembly operable with a vacuum device.
  • the power tool assembly includes a power tool having a housing defining a cavity, a motor supported by the housing in the cavity, an output shaft extending from the housing and operably coupled to the motor, and a vacuum attachment removably coupled to the housing.
  • the vacuum attachment includes an inlet positioned adjacent and in facing relationship with the output shaft, an outlet, and a passageway fluidly communicating the inlet and the outlet.
  • the passageway is fluidly isolated from the cavity.
  • the power tool assembly also includes a hose having a first end coupled to the outlet of the vacuum attachment and a second end configured to be coupled to the vacuum device.
  • the power tool assembly further includes a power cord disposed alongside the hose and operable to transfer power from the vacuum device to the motor.
  • FIG. 1 is a front perspective view of a power tool assembly according to one embodiment of the invention, illustrating a power tool and a vacuum device.
  • FIG. 2 is a rear perspective view of the power tool assembly of FIG. 1.
  • FIG. 3 is an enlarged, partial cross-sectional view of the power tool of FIGS. 1 and 2, illustrating a vacuum attachment of the power tool.
  • FIG. 4 is an exploded, front perspective view of the power tool of FIGS. 1 and
  • FIG. 5 is a front perspective view of the power tool of FIGS. 1 and 2, illustrating the vacuum attachment shown in FIGS. 1-4, an alternative vacuum attachment, and a cover that may be interchangeably coupled to the power tool.
  • FIGS. 1 and 2 illustrate a power tool assembly 10 including a power tool 14, a suction or vacuum device 18, and a hose 22 interconnecting the power tool 14 and the vacuum device 18.
  • the illustrated power tool 14 is configured as a saw, and specifically as a saw designed for removing plaster, fiberglass, or plastic casts from an individual's body.
  • Such a "cast saw” includes a blade 26 that is driven in an oscillating manner about its axis 30 (FIG. 4).
  • the power tool 14 may be configured as a different type of saw, or may be configured as a different type of power tool altogether.
  • the power tool 14 includes a two-piece housing 34 defining a cavity 36, a motor 38 supported by the housing 34 in the cavity 36, and an output shaft 42 extending from the housing 34 and operably coupled to the motor 38.
  • the motor 38 is configured as a 12 volt DC can-style motor that may be electrically connected to a source of power (e.g., AC household line current) via a power cord 46 extending from the housing 34 and a power converter or AC adapter (not shown) that is connectable to the power cord 46.
  • the power tool 14 may include a battery with which to power the motor 38.
  • the motor 38 may also be configured to operate using a voltage greater or less than 12 volts.
  • the motor 38 may be configured as an AC electric motor and use power (e.g., AC household line current) directly without using a power converter or AC adapter.
  • the motor 38 may be configured as a fluid or pneumatic motor operable using compressed fluid or gas.
  • the power tool 14 also includes a switch 50 that is electrically connected between the motor 38 and the power cord 46.
  • the switch 50 is configured as a three-position switch, including respective positions for low-speed operation, high-speed operation, and an "off position.
  • the switch 50 may be configured in any of a number of different ways (e.g., a momentary switch, etc.).
  • the power tool 14 further includes a transmission 54 coupling the motor 38 and the output shaft 42.
  • the transmission 54 is configured to convert a continuous, rotational output of the motor 38 to an oscillating output of the output shaft 42 and the attached blade 26 about the axis 30 of the blade 26.
  • the transmission 54 converts the continuous, rotational output of the motor 38 to an oscillating output of the output shaft 42 and the attached blade 26 having an arc length of about 8 degrees (i.e., about 4 degrees side-to-side relative to a "home" or neutral position of the output shaft 42 and the blade 26).
  • the transmission 54 may also be configured to increase or decrease the rotational speed of the output shaft 42 relative to the speed of the rotational output of the motor 38.
  • the transmission 54 may be configured to convert the rotational output of the motor 38 to a continuous, rotational output of the output shaft 42 and the attached blade 26.
  • the power tool 14 also includes a coupling
  • the coupling 58 interconnecting an output shaft 62 of the motor 38 with an input shaft 66 of the transmission 54, such that the torque output by the output shaft 62 is directly transferred to the transmission input shaft 66.
  • the coupling 58 may be made of a solid material (e.g., metal), an elastomeric material (e.g., rubber), or a combination thereof.
  • the coupling 58 and the transmission input shaft 66 may be omitted, and the motor output shaft 62 may be directly input to the transmission 54 such that the motor output shaft 62 is shared by the motor 38 and the transmission 54.
  • the power tool 14 further includes a shaft housing 70 interconnecting the motor 38 and the transmission 54 to maintain the alignment of the motor output shaft 62, the coupling 58, and the transmission input shaft 66 and to substantially enclose the coupling 58 and the shafts 62, 66.
  • the coupling 58 is shown as a straight, single piece, the coupling 58 may alternatively be configured to compensate for slight misalignment of the motor output shaft 62 and the transmission input shaft 66 (e.g., by incorporating a universal joint or a flexible coupling).
  • the output shaft 42 includes an arbor 74
  • the blade 26 includes an aperture 78 through which the arbor 74 is inserted to position the blade 26 on the arbor 74.
  • the blade aperture 78 and the arbor 74 each include a similar non- circular cross-sectional shape (e.g., a hexagonal cross-sectional shape) to rotationally secure the blade 26 to the arbor 74.
  • Other non-circular cross-sectional shapes e.g., a polygon, an oval, etc.
  • features e.g., a key and keyway arrangement
  • the saw blade 26 is positioned adjacent a shoulder 82 on the arbor 74, and a chuck 86 is fastened to the arbor 74 (e.g., using a cap screw 90, etc.) to axially secure the blade 26 between the chuck 86 and shoulder 82.
  • the saw blade 26 may be axially secured to the output shaft 42 in any of a number of different ways.
  • a support sleeve 92 is inserted over the output shaft 42 and is positioned on the opposite side of the blade 26 as the chuck 86.
  • the support sleeve 92 is stationary with respect to the housing 34 and the transmission 54, and provides additional support to the rear of the blade 26 during oscillation of the blade 26.
  • the support sleeve 92 includes a plurality of axially-extending protrusions 93 defining therebetween respective grooves 95. As shown in FIG. 3, the protrusions 93 slidably engage the rear of the blade 26 to provide a seal between the blade 26 and the respective protrusions 93 during oscillation of the blade 26.
  • the power tool further includes a vacuum attachment 94 coupled to the housing 34.
  • the vacuum attachment 94 includes a head 98 containing an inlet 102 of the vacuum attachment 94 positioned adjacent and in facing relationship with the output shaft 42.
  • the vacuum attachment 94 also includes a connector 106 containing an outlet 110 of the vacuum attachment 94, and a hollow or tubular body 114 interconnecting the head 98 and the connector 106.
  • the body 114 includes a duct or passageway 118 fluidly communicating the inlet 102 and the outlet 110 of the vacuum attachment 94.
  • the passageway 118 is fluidly isolated from the cavity 36, and the passageway 118 is disposed entirely outside of the housing 34.
  • the vacuum attachment 94 also includes a guard 122 coupled to the head 98 and enclosing a portion of the saw blade 26.
  • the guard 122 is integrally formed as a single piece with a portion of the head 98, while the remainder of the head 98, the tubular body 114, and the connector 106 of the vacuum attachment 94 are initially formed as separate pieces that are joined together by an ultrasonic welding process.
  • the vacuum attachment 94 may be formed as a single piece including the guard 122, the head 98, the tubular body 114, and the connector 106.
  • the guard 122 may be a separate and distinct component from the vacuum attachment 94 and coupled to the vacuum attachment 94 in any of a number of different ways (e.g., by fastening, using adhesives, etc.).
  • a front wall 124 of the head 98 may be omitted, thereby combining the guard 122 and the head 98 of the vacuum attachment 94 in a single enclosure through which a vacuum may be drawn.
  • the vacuum attachment 94 also includes a plurality of apertures 126 in the head 98 (only one of which is shown) extending in a direction substantially parallel with the axis 30 of the output shaft 42.
  • the apertures 126 receive respective posts or projections 130 extending from the front of the power tool housing 34 (only one of which is shown in FIGS. 3 and 5) to locate the inlet 102 of the vacuum attachment 94 relative to the output shaft 42.
  • An interference or press-fit may be utilized to positively secure the projections 130 within the respective apertures 126, and therefore the head 98 of the vacuum attachment 94 to the power tool housing 34.
  • the inlet 102 of the vacuum attachment 94 is located within a relatively small running clearance (e.g., 2 mm in the illustrated construction) of the output shaft 42.
  • the rear of the vacuum attachment 94 is secured to the power tool housing 34 using a single fastener (e.g., a screw 134).
  • the screw 134 is threaded to an insert 138 within the power tool housing 34, thereby preventing the rear of the vacuum attachment 94 from being inadvertently removed from the power tool housing 34.
  • different structure may be utilized to interconnect the rear of the vacuum attachment 94 with the power tool housing 34 (e.g., quick-disconnect structure, etc.).
  • the power tool housing 34 includes a recess 142 having a depth sized to receive the tubular body 114 of the vacuum attachment 94 such that the tubular body 114 is sunken into the power tool housing 34 to fill the recess 142.
  • the passageway 118 is at least partially disposed in the recess 142, and the transition between the outer peripheral surfaces of the housing 34 and the tubular body 114 of the vacuum attachment 94, respectively, is substantially smooth.
  • the recess 142 may include a depth such that only a portion of the tubular body 114 is sunken into the power tool housing 34.
  • the recess 142 may be omitted and no portion of the vacuum attachment 94 may be sunken into the power tool housing 34.
  • a power cord 146 is incorporated with the hose 22 such that only a single line or tether interconnects the vacuum device 18 and the power tool 14. More particularly, the power cord 146 is incorporated within the wall of the hose 22 for most of the hose length, with the exception of ends of the power cord 146 that protrude from the hose 22 to interconnect with the power cord 46 of the tool 14 and an electrical outlet on the vacuum device 18, respectively.
  • the power cord 146 may be disposed entirely outside of the hose 22 and secured to the hose 22 (e.g., using clamps, tape, etc.) along the length of the hose 22 such that the hose 22 and the power cord 146 substantially simulate a single tether interconnecting the power tool 14 and the vacuum device 18.
  • the hose 22 includes a detent mechanism 150 that secures the hose 22 to the connector 106 of the vacuum attachment 94.
  • the detent mechanism 150 includes a detent 154 that is selectively received within an aperture 158 in the connector 106 and a biasing element (e.g., a compression spring 162) that biases the detent 154 into the aperture 158.
  • a biasing element e.g., a compression spring 162
  • the user of the power tool 14 would first depress the detent 154 against the bias of the spring 162, and then pull the hose 22 away from the connector 106 to disengage the hose 22 from the connector 106.
  • the user would depress the detent 154 against the bias of the spring 162, and then push the hose 22 onto the connector 106 until the detent 154 is aligned with the aperture 158, at which time the spring 162 is allowed to rebound or expand to push the detent 154 at least partially into the aperture 158 in the connector 106.
  • the detent mechanism 150 then prevents the hose 22 from being inadvertently removed from the connector 106 of the vacuum attachment 94.
  • the hose 22 may be secured to the connector 106 in any of a number of different ways (e.g., using interference or press-fit, using fasteners, etc.).
  • the user would first attach the vacuum attachment 94 to the power tool 14 (if it is not already attached) by inserting the projections 130 on the front of the power tool housing 34 within the respective apertures 126 in the head 98 and fastening the rear of the vacuum attachment 94 to the housing 34. Then, the user would attach the hose 22 using the detent mechanism 150 according to the procedure discussed above, and electrically connect the power cords 146, 46 incorporated within the hose 22 and extending from the power tool 14, respectively. Finally, the user would activate the vacuum device 18 to initiate suction through the hose 22 and the vacuum attachment 94.
  • the debris generated by the oscillating saw blade 26 is suctioned through a plurality of openings defined by the rear of the blade 26 and the grooves 95 in the support sleeve 92, around the output shaft 42, and into the inlet 102 of the vacuum attachment 94 (along flow path F). Such debris is subsequently drawn through the passageway 118, the outlet 110 of the vacuum attachment 94, and the hose 22 before being collected within the vacuum device 18.
  • the user of the power tool 14 may remove the vacuum attachment 94 for cleaning by removing the single screw 134, lifting the rear of the vacuum attachment 94 from the power tool housing 34, and then pushing the head 98 of the vacuum attachment 94 away from the front of the power tool housing 34 to remove the projections 130 from the respective apertures 126.
  • the detached vacuum attachment 94 may then be cleaned (e.g., using a fluid or a pressurized gas, etc.) to remove the obstruction and reattached to the power tool housing 34 using the procedure discussed above.
  • FIG. 5 also illustrates a cover 170 configured to attach to the power tool housing 34 in a similar manner as the vacuum attachments 94, 166 when the power tool 14 is utilized in applications not necessitating either of the vacuum attachments 94, 166 or the vacuum device 18.
  • the cover 170 takes up or occupies the recess 142 in the housing 34 such that the user of the power tool 14 is able to grasp the power tool housing 34 without noticing the recess 142.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

L'invention porte sur un outil électrique, qui comprend un boîtier définissant une cavité, un moteur supporté par le boîtier dans la cavité, un arbre de sortie s'étendant à partir du boîtier et couplé de façon fonctionnelle au moteur, et une fixation à vide couplée de façon amovible au boîtier. La fixation à vide comprend une entrée positionnée au voisinage de l'arbre de sortie et en relation de vis-à-vis avec celui-ci, une sortie, et un chemin de passage faisant communiquer fluidiquement l'entrée et la sortie. Le chemin de passage est isolé fluidiquement de la cavité.
PCT/US2009/052798 2009-04-14 2009-08-05 Outil électrique comprenant une fixation à vide WO2010120322A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16908409P 2009-04-14 2009-04-14
US61/169,084 2009-04-14

Publications (1)

Publication Number Publication Date
WO2010120322A1 true WO2010120322A1 (fr) 2010-10-21

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ID=42982766

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/052798 WO2010120322A1 (fr) 2009-04-14 2009-08-05 Outil électrique comprenant une fixation à vide

Country Status (1)

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WO (1) WO2010120322A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013006263A (ja) * 2011-05-23 2013-01-10 Makita Corp 防水シート及び防水シートを装着した注水式電動工具
CN106112814A (zh) * 2016-06-28 2016-11-16 安徽海龙建筑工业有限公司 一种移动修补的无扬尘工具
WO2017127814A1 (fr) * 2016-01-22 2017-07-27 RhinoX Tool, LLC Appareil de retrait de plâtre orthopédique
WO2018024523A1 (fr) * 2016-08-03 2018-02-08 Robert Bosch Gmbh Système de collecte de poussière pour outil électrique rotatif
WO2018180896A1 (fr) * 2017-03-31 2018-10-04 株式会社マキタ Outil électrique
US20200361047A1 (en) * 2017-09-08 2020-11-19 G. A. W. Inc. Vacuum Dust Extraction Apparatus for a Percussive Air Tool
GB2620109A (en) * 2022-06-13 2024-01-03 Cole Oliver Dust extraction hose

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951714A (en) * 1956-11-29 1960-09-06 Electrolux Ab Detachable coupling for a vacuum cleaner hose
US4361957A (en) * 1980-02-16 1982-12-07 Robert Bosch Gmbh Pneumatic hand tool with vacuum debris removal
US4421111A (en) * 1982-03-02 1983-12-20 Black & Decker Inc. Low-voltage surgical cast cutter with vacuum exhaust of debris
US4543718A (en) * 1984-02-01 1985-10-01 Twin City Surgical, Inc. Cast cutter apparatus
US5435066A (en) * 1993-02-18 1995-07-25 M-Pact Corporation Cutting device and assembly
US5878607A (en) * 1995-07-06 1999-03-09 Johnson & Johnson Professional, Inc. Surgical cast cutter
US20030140751A1 (en) * 2001-12-28 2003-07-31 Coe Newnes/Mcgehee Ulc Saw guide pad seal

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951714A (en) * 1956-11-29 1960-09-06 Electrolux Ab Detachable coupling for a vacuum cleaner hose
US4361957A (en) * 1980-02-16 1982-12-07 Robert Bosch Gmbh Pneumatic hand tool with vacuum debris removal
US4421111A (en) * 1982-03-02 1983-12-20 Black & Decker Inc. Low-voltage surgical cast cutter with vacuum exhaust of debris
US4543718A (en) * 1984-02-01 1985-10-01 Twin City Surgical, Inc. Cast cutter apparatus
US5435066A (en) * 1993-02-18 1995-07-25 M-Pact Corporation Cutting device and assembly
US5878607A (en) * 1995-07-06 1999-03-09 Johnson & Johnson Professional, Inc. Surgical cast cutter
US20030140751A1 (en) * 2001-12-28 2003-07-31 Coe Newnes/Mcgehee Ulc Saw guide pad seal

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013006263A (ja) * 2011-05-23 2013-01-10 Makita Corp 防水シート及び防水シートを装着した注水式電動工具
WO2017127814A1 (fr) * 2016-01-22 2017-07-27 RhinoX Tool, LLC Appareil de retrait de plâtre orthopédique
US10524967B2 (en) 2016-01-22 2020-01-07 RhinoX Tool, LLC Orthopedic cast removal apparatus
CN106112814A (zh) * 2016-06-28 2016-11-16 安徽海龙建筑工业有限公司 一种移动修补的无扬尘工具
WO2018024523A1 (fr) * 2016-08-03 2018-02-08 Robert Bosch Gmbh Système de collecte de poussière pour outil électrique rotatif
US20180036852A1 (en) * 2016-08-03 2018-02-08 Robert Bosch Tool Corporation Dust Collection System for a Rotary Power Tool
US10493579B2 (en) 2016-08-03 2019-12-03 Robert Bosch Tool Corporation Dust collection system for a rotary power tool
WO2018180896A1 (fr) * 2017-03-31 2018-10-04 株式会社マキタ Outil électrique
US20200361047A1 (en) * 2017-09-08 2020-11-19 G. A. W. Inc. Vacuum Dust Extraction Apparatus for a Percussive Air Tool
US11597046B2 (en) * 2017-09-08 2023-03-07 G.A.W. Inc Vacuum dust extraction apparatus for a percussive air tool
GB2620109A (en) * 2022-06-13 2024-01-03 Cole Oliver Dust extraction hose

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