EP0335032A1 - Impulsschrauber - Google Patents

Impulsschrauber Download PDF

Info

Publication number
EP0335032A1
EP0335032A1 EP88308152A EP88308152A EP0335032A1 EP 0335032 A1 EP0335032 A1 EP 0335032A1 EP 88308152 A EP88308152 A EP 88308152A EP 88308152 A EP88308152 A EP 88308152A EP 0335032 A1 EP0335032 A1 EP 0335032A1
Authority
EP
European Patent Office
Prior art keywords
striking
impact
hammer
clutch
collar
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.)
Withdrawn
Application number
EP88308152A
Other languages
English (en)
French (fr)
Inventor
Osamu Shinano Pneumatic Industries Inc. Izumisawa
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.)
SHINANO PNEUMATIC INDUSTRIES Inc
Shinano Pneumatic Ind Inc
Original Assignee
SHINANO PNEUMATIC INDUSTRIES Inc
Shinano Pneumatic Ind Inc
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 SHINANO PNEUMATIC INDUSTRIES Inc, Shinano Pneumatic Ind Inc filed Critical SHINANO PNEUMATIC INDUSTRIES Inc
Publication of EP0335032A1 publication Critical patent/EP0335032A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/026—Impact clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket

Definitions

  • This invention concerns an impact clutch which is used to tighten and fix bolts, nuts and other appropriate parts in the positions where they are to be fixed using a certain tightening force, and also in reverse, to loosen and remove such members previously tightened and fixed.
  • This invention solves the afore-mentioned problems, by providing an impact clutch which is more durable and less easily broken, through the positioning of the hammer in a stable position in the clutch case, thus making operation more reliable by ensuring that the hammer's striking surface strikes the striking collar across its whole contact surface.
  • reference numeral 1 denotes an air motor or electric motor, in this embodiment an air motor 1. Further, this air motor 1 is rotatable within the body 4 by the action of pressurized air which is introduced from an air inlet portion 3 through the operation of the opening/closing lever 2.
  • the main driving shaft 5 of the air motor 1 is connected and fixed to the clutch case 6.
  • This clutch case 6 is constructed internally of a receiving chamber 7 which has a cross-section C shape, and further the clutch case 6 is mounted rotatably within the casing 8 which is connected to the body 4.
  • An impact spindle 11 is provided in a central axial direction on the inside of the receiving chamber 7 via a bearing 10 which is designed to prevent the transmission of the rotation of the clutch case 6.
  • a bearing 10 which is designed to prevent the transmission of the rotation of the clutch case 6.
  • On one of the outer surfaces of this impact spindle 11 are projected, at right-­angles, two striking collars 12, while on another outer surface a spline 13 is constructed in an axial direction, so that the spline 13 engages slidably and axially with a cam 14.
  • the tapered cam surface 16 of the cam 14 is normally in contact with multiple rotatable balls 15 which are positioned against the outside surface of the bearing 10.
  • a hammer 17 is also positioned on the outside of this cam 14. As indicated in Figs.
  • this hammer 17 is divided into two parts, with each part constructed of a supporting part 20 which is rotatable in relation to the outside surface of the annular projection 18 of the cam 14, and a striking part 21 for striking the striking collar 12 of the impact spindle 11.
  • This striking part 21 is constructed of a greater thickness than the supporting part 20, and also part of the striking part 21 projects externally and axially from the supporting part 20.
  • This "projecting part” becomes a mating pin 23 which engages retractably with the grove 22 provided axially on the inner surface of the clutch case 6.
  • the striking surface 24 which strikes the striking collar 12 is constructed with a flat surface so that it strikes the striking collar 12 across its entire surface.
  • the bias face 25 at the opposite end of the hammer 17 from the striking collar 12 is pressed against the annular collar 26 of the cam 14 by the pressure of the bias spring 27, while the cam surface 16 of the cam 14 is normally pressed against the balls 15.
  • the fore-end face 28 of the impact spindle 11 which is struck and caused to rotate by the hammer 17 protrudes externally from the casing 28, and has connected to it other working parts (not shown in the drawings) such as a screw-driver or a wrench.
  • the working members attached to the fore-end part 28 of the impact spindle 11 are placed in contact with the bolts and nuts to be tightened.
  • the opening/closing lever 2 is operated to introduce pressurized air and start the air motor 1.
  • the clutch case 6 connected to the main driving shaft 5 will rotate with the shaft, thereby causing the bearing 10, the balls 15 and the hammer 17 to also rotate.
  • the balls 15 slide with respect to the cam surface 16 of the cam 14 which is not rotating, causing the cam 14 to slide axially in accordance with the spline 13 of the impact spindle 11, and at the same time the hammer 17, the mating pins 23 of which are retractably engaged in the groves 22 of the clutch case 6, is pressed against the cam 14, and while continuously rotating together with the clutch case 6, then slides towards the striking collar 12 in reaction to the recovery force of the bias spring 27.
  • the hammer 17, rotating slides towards the striking collar 12, and the ball 15 reaches the protruding end of the cam surface 16, the hammer 17 strikes the striking collar 12 of the impact spindle 11.
  • the hammer 17 immediately retracts from the striking surface 24 of the striking collar 12 after striking it, if external torque over and above the present torque value is applied to the impact spindle 11, the striking action is merely repeated; no shock is applied to the hand of the operator holding the body 4, and the device is not caused to rotate in the reverse direction.
  • the hammer 17 retracts into a state where the mating pin 23 is fitted into the grove 22 in the clutch case, and can be maintained in a stable position without failing; further, there is no chance of the device becoming inoperable, or of the striking collar 12 striking inaccurately.
  • the hammer 17 is constructed flat so that it strikes the striking surface 24 and the striking collar 12 across its contact surface, rather than in the previous construction using hammer pins in which the striking part 21 of the hammer 17 struck the striking collar 12 linearly.
  • This impact clutch when constructed as described above with a hammer which retracts into a grove in the clutch case, can normally maintain stable operation without failing and becoming inoperable, or inaccurately striking the striking collar. Further, because the hammer is constructed flat so that its striking surface can strike the striking collar along the whole surface, there is no danger of linear contact between the striking part of the hammer and the striking collar, thus providing a device with excellent shock resistance and durability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
EP88308152A 1988-03-26 1988-09-02 Impulsschrauber Withdrawn EP0335032A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP72931/88 1988-03-26
JP63072931A JPH0763938B2 (ja) 1988-03-26 1988-03-26 インパクトクラッチ

Publications (1)

Publication Number Publication Date
EP0335032A1 true EP0335032A1 (de) 1989-10-04

Family

ID=13503602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88308152A Withdrawn EP0335032A1 (de) 1988-03-26 1988-09-02 Impulsschrauber

Country Status (3)

Country Link
EP (1) EP0335032A1 (de)
JP (1) JPH0763938B2 (de)
KR (1) KR920009834B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237229A (en) * 1989-09-25 1991-05-01 Chicago Pheumatic Tool Company Impact wrench
EP0976501A2 (de) * 1998-07-28 2000-02-02 Rodcraft Pneumatic Tools GmbH & Co. KG Schlagschraubgerät mit ausschaltbarem Schlagmechanismus
WO2006133846A2 (de) 2005-06-17 2006-12-21 Bayer Materialscience Ag Optischer datenspeicher, dessen herstellung und verwendung
WO2012055700A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Handwerkzeugmaschine mit einem mechanischen schlagwerk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060266537A1 (en) * 2005-05-27 2006-11-30 Osamu Izumisawa Rotary impact tool having a ski-jump clutch mechanism
WO2016002539A1 (ja) * 2014-06-30 2016-01-07 日立工機株式会社 打撃工具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881884A (en) * 1955-01-12 1959-04-14 Chicago Pneumatic Tool Co Impact clutch
DE3007630A1 (de) * 1979-08-27 1981-03-12 Rodac Pneumatic Tools, Carson, Calif. Drehschlag-kupplung fuer einen drehschlagschrauber.
JPS62246480A (ja) * 1986-04-16 1987-10-27 信濃空圧工業株式会社 締め付け装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155373A (ja) * 1984-01-26 1985-08-15 多賀　羊太郎 カム式インパクトレンチにおけるアンビルピンの支持構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881884A (en) * 1955-01-12 1959-04-14 Chicago Pneumatic Tool Co Impact clutch
DE3007630A1 (de) * 1979-08-27 1981-03-12 Rodac Pneumatic Tools, Carson, Calif. Drehschlag-kupplung fuer einen drehschlagschrauber.
JPS62246480A (ja) * 1986-04-16 1987-10-27 信濃空圧工業株式会社 締め付け装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237229A (en) * 1989-09-25 1991-05-01 Chicago Pheumatic Tool Company Impact wrench
GB2237229B (en) * 1989-09-25 1993-08-18 Chicago Pneumatic Tool Co Powered impact wrench
EP0976501A2 (de) * 1998-07-28 2000-02-02 Rodcraft Pneumatic Tools GmbH & Co. KG Schlagschraubgerät mit ausschaltbarem Schlagmechanismus
EP0976501A3 (de) * 1998-07-28 2001-04-18 Rodcraft Pneumatic Tools GmbH & Co. KG Schlagschraubgerät mit ausschaltbarem Schlagmechanismus
WO2006133846A2 (de) 2005-06-17 2006-12-21 Bayer Materialscience Ag Optischer datenspeicher, dessen herstellung und verwendung
WO2012055700A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Handwerkzeugmaschine mit einem mechanischen schlagwerk
CN103167935A (zh) * 2010-10-29 2013-06-19 罗伯特·博世有限公司 具有机械式冲击机构的手持式工具机

Also Published As

Publication number Publication date
JPH01246080A (ja) 1989-10-02
JPH0763938B2 (ja) 1995-07-12
KR920009834B1 (ko) 1992-10-31
KR890014216A (ko) 1989-10-23

Similar Documents

Publication Publication Date Title
US4936701A (en) Universal joint with rotating holder sleeve
US5673758A (en) Low-noise impact screwdriver
US7654779B2 (en) Power tool
US4768405A (en) Locking socket wrench drive device
US4781085A (en) Locking socket wrench extension
US6370993B1 (en) Spring loaded self actuating impact driver
US20020020973A1 (en) Workpiece connector for a power tool
US5740892A (en) Power wrench torque transmission mechanism
US4184552A (en) Manually actuated impact tool
US5577425A (en) Angle type power nutrunner
CA1127432A (en) Rotary impact tool for applying a torque force
EP0335032A1 (de) Impulsschrauber
US5438891A (en) Collet type fastener removal tool
US4006608A (en) Torque release drive coupling
US5839518A (en) Centrifugal force-controlled coupling switch mechanism for an electric drill
WO1990002634A1 (en) Locking socket wrench drive device
US5850767A (en) Ratchet reversing mechanism
US4794830A (en) Tool for loosening fasteners
US4824280A (en) Locking adapter for interconnecting a drivable element to a drive tool
JPS5866671A (ja) 固着具固定用の圧縮空気で駆動される手持ち工具
EP0433284B1 (de) Einrastvorrichtung für den antrieb eines steckschrauben-schlüssels
EP0149874B1 (de) Schlagschrauber
US20020185286A1 (en) Impact tool with detachable drive end
WO2022204349A1 (en) Quick release socket
JP2935338B2 (ja) ネジ締め機のクラッチ機構

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890105

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19901211

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910622