US2702098A - Shaft locking arrangement - Google Patents

Shaft locking arrangement Download PDF

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Publication number
US2702098A
US2702098A US37742553A US2702098A US 2702098 A US2702098 A US 2702098A US 37742553 A US37742553 A US 37742553A US 2702098 A US2702098 A US 2702098A
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Grant
Patent type
Prior art keywords
shaft
button
end
housing
opening
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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
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Inventor
Julius H Staak
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General Electric Co
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General Electric Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q11/00Accessories 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
    • B23Q11/0078Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0092Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H02K7/145Hand-held machine tool
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/34Accessory or component
    • Y10T279/3431Chuck key

Description

Feb. 15,1955

J. H STAAK SHAFT LOCKING ARRANGEMENT Filed Aug. 31, 1953 T7M HAS Attorney SHAFT LOCKING ARRANGEMENT Julius H. Stank, Fort Wayne, Ind., asslgnor to General Electric Company, a corporation of New York Application August 31, 1953, Serial No. 377,425 Claims. '(Cl. 188-69 several different tools at the end of a motor-driven rotatable shaft. This is usually achieved by threading the end of the shaft, slipping a tool over the shaftagamst a collar in the housing, placing a stop collar against the tool, and then tightening a nut on the threaded portion of the shaft to hold the tool and the stop collar m place.

To change tools the nut is taken off, the tool and stop collar are removed, another tool and the sto collar are replaced on the shaft, and the nut is tightens again. To

rform this operation it is necessary that the shaft 5: prevented from rotation and, where the nut has been tightened at all excessively, that the shaper be held firmly; since an operator must use one hand to hold the shaper and the other hand to manipulate a tool to remove the nut it is desirable that there be some simple means of locking the shaft against rotation which mil require no attention from the operator.

An object of this invention is therefore to provide a lock for a shaft which will not require manual operation by the operator.

Another object of this invention ts to provide improved locking means for a shaft which will operate automatically when the device is placed on end on a hard surface with the motor at rest.

.at 11 to flange 8.

2,702,098 Patented Feb. 15, 1955 2 bearing 19 in recess 20 of housing 11 and threads 5 are provided on the end thereof. After the desired tool is slipped over threads 5 to rest against a collar 23, which pro ects very slightly beyond housing front 6 to permit .rotation without interference from the housing, a collar (not shown) is placed against the tool, and a nut (not shown) is tightened on the threads to maintain the tool and the collar securely in place. other extension 21 on the other side of motor 2. Shaft extension 21 is rotatably supported by a bearing 7 fixed to a stationary flange 8 which forms part of the end flange 9 of housing 17. A button-like member 10, preferably having a longitudinal axis coincident with the longitudinal axis of shaft extension 21, as shown, is keyed As is shown in Fig. 3 keyways may extend around the entire circumference of button 10, but fewer keyways will be equally advantageous.

The shaft extension 21 has one or more flat surfaces 12 formed thereon. An opening 13 inside button 10 is given the same form as shaft extension 21 with flat surface (or surfaces) 12. A spring 14, hearing against button 10 at one end, and against a flat member 15 held in recess 22 by bearing 7 at the other end, normally biases button 10 to its outward position; the outermost position of the button 10 is determined by flange 16 on the button.

Referring now to Fig. 2 the normal biased position of button 10 is shown in outline. .When pressure is applied to button 10, as by standing shaper on its end on a hard surface so that extension 18 of shaft 4 is uppermost, the button is depressed to the position shown, against the action of spring 14. Opening 13 then slides over shaft extension 21. Since button 13 cannot rotate I it to its outer position, the travel of button 10 being become apparent andthe invention will be better understood by reference to the following description and theaccompanying drawing. The features of novelty which characterize this invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.

The objects of m invention may be reallzed, m one embodiment, throu the provision of a member, pro ecting from the end of a hand shaper opposite from. the tool end, which may move axially of the shaft but which cannot rotate. This member is provided with a noncircular opening facing the shaft and the end of the shaft is given the same she as the opening. When the shaper is placed on end e member slides inwardly, the opening m the end of the member'shdes over the projectitg end of the shaft, and the shaft is thereby prevent from rotating. Removal of the shaper from its last mentioned position releases the pressure forcing the member inwardly. Biasmg means are prov1ded to cause the member to then return to its original pro ecting position and the shaft is again free to rotate since the formed end of the shaft no longer fits m the the member.

'In the drawing:

Fi l is a side view, partly m cross-section on the line l-l of Fig. 3, of a hand shaper embodying the novel locking means of this invention;

' Fig. 2 is a side view, partly in cross-section, of the novel lotgting means of this invention in operative position; an

a Fig. 3 is an end view of that end of the shaper at which the novel locking means of this invention is located.

Referring now to Fig. l of the drawing there s shown a hand shaper generally indicated at 1. An electric motor opemng-in i -on the part of the operator, and that limited by the location of flange l6. Shaft 4 is then free to be rotated again by motor 2.

It is now clear that this invention provides an improved shaft lockmg arrangement which will lock the shaft 4 of hand shaper 1 without any effort or attention this will occur with the shaper m a convenient position both for holding it and for manipulating a nut on threads 5. While the locking arrangement of this invention has been described in connection with a hand shaper, it may be used to equal advantage in any other comparable portable device where it is desirable for any reason to atiirmatively maintain station a normally rotatable shaft.

While the invention has been explained by describing a particular embodiment thereof it will be apparent that housing and a shaft rotatably mounted therein, improved 2 is mounted within shell 17 and. hasits rotor 3 mounted on a shaft 4 which has an extension 18 for mounting a means for locking said shaft against rotation comprising a member projecting through said housing and slidably keyed thereto, said member having a non-circular opening formed opposite an end of said shaft, said shaft end having a shape substantially similar to said opening, said member and said shaft being so arranged that an application of external force'on said member will force the same over said shaft end to cause said shaft end and said opening to mate whereby said shaft is prevented from rotating, and means biasing said member away from said shaft end. g p

2. A hand tool comprising a substantiallycylindrical housing, a motor mounted in said housing, a shaft extending from both sides of said motor and adapted to be rotated thereby, said shaft having an end extending outside one end of said housing, said shaft end being adapted to receive a tool, a button in said housing extending past the Shaft 4 also has an-.

. a 3 end thereof which isopposite to said tool receiving shaft end, said button being slid'ablykeyed to said housing to prevent rotation, said shaftand said button having a common longitudinal axis, said button having formed therein opposite the other end of said shaft a non-circular opening, said other shaft end having a shape substantially similar to said opening, said button and said other end of said shaft being arranged so that an application of force on said button from a source external to said housing will force said button over said other end of said shaft to cause the same and said opening to mate whereby said shaft is prevented from rotating, and spring means biasing said utton away from said other shaft end.- U

3. in combination with a device having a stationary housing and a shaft rotatably mounted therein, improved means for locking said shaft against rotation comprising an axially slidable button extending through said housing and having a longitudinal axis coincident with the longitudinal axis of said shaft, a flange on said housing surrounding said button, said button being keyed to said flange thereby to' prevent rotation of said button, said button having a non-circularopening formed opposite an end of said shaft, said shaft end havlng a shape substantially similar to said opening whereby an application of external force along the longitudinal axis of said button will force the same over said shaft end to cause said shaft end and said opening to mate whereby said shaft is prevented from rotgtllilg,ft and spring means biasing said button away from an a 4. In combination with a .device having a stationary housing and a shaft rotatably mounted therein, improved means for locking said shaft against rotation comprising an axially slidable button extending through said housing and having a longitudinal axis coincident with the longitudinal axis of said shaft, a flange on said housing surrounding said button, said button being keyed to said flange around its entire circumference thereby-to prevent rotation of said button, said button having a partly circular opening formed opposite an end of said shaft, said shaft end having a shape substantial] similar said button and saidshaft end being so arranged that an application of external force along the longitudinal axis of said button will/cause said button to slide toward said shaft to cause sa d shaft end and said opening to mate whereby said shaft is prevented from rotating, and coil spring means bias ng said member away from said shaft.

5 In comblnatlon with an electrically driven hand tool having astatronary housing and a shaft rotatably mounted therein, improved means for locking said shaft against rotatlon com rlslng an axially slidable button normally pro ectlng ugh and beyond the outside of said housing, a angc on said housing surrounding said button, said button belng keyed to said flange around its entire circumference thereby aflirmatively to prevent rotation of said button, said button having an opening whose cross-section comprises at least one flat surface opposite an end'of said shaft, sald shaft end having a shape substantially similar to said openlng, sald button and said shaft end being so arranged that an apphcatlon of external force along the longltudlnal axis of said button will cause said button to slide toward said shaft to cause said shaft end and said opening to mate whereby said shaft is affirmatively prevented from rotating, a bearing adjacent said shaft end rotatably supporting said shaft, a flat member secured to said bearing and facing said button, and a coil spring between said member and said button adapted to bias said button away from said shaft. 4

to said opening, 40

FOREIGN PATENTS 860,195 France Sept. 24, 1940

US2702098A 1953-08-31 1953-08-31 Shaft locking arrangement Expired - Lifetime US2702098A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872197A (en) * 1957-09-10 1959-02-03 Singer Mfg Co Portable tools with selective means for locking spindle
US2876369A (en) * 1955-04-28 1959-03-03 Dormeyer Corp Portable power drill
US2881866A (en) * 1953-12-10 1959-04-14 Perfect Circle Corp Brake means
US3044091A (en) * 1960-04-22 1962-07-17 Nishihama Archie Akira Tool attaching means for circular rubbing machines
US3334448A (en) * 1964-03-20 1967-08-08 Rockwell Mfg Co Spindle lock for a power tool
US3848522A (en) * 1972-07-10 1974-11-19 Mc Graw Edison Co Rotisserie spit mounting means
US4213622A (en) * 1978-02-17 1980-07-22 Roehm Guenter H Lockable chuck for hammer drill
WO1992011972A1 (en) * 1991-01-09 1992-07-23 Robert Bosch Gmbh Electric rotary hand tool, especially hand circular saw
US5191968A (en) * 1991-09-23 1993-03-09 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
US5346342A (en) * 1993-03-19 1994-09-13 Ryobi Motor Products Corp. Shaft lock arrangment for a power tool
US20070062715A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Switch for power tool
US20070062005A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Handle for power tool
US7547167B2 (en) 2005-09-16 2009-06-16 Robert Bosch Gmbh Storage drawer for hand-held power tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1040327A (en) * 1911-07-01 1912-10-08 Miles S Hollis Stop-cock.
US1384256A (en) * 1920-06-07 1921-07-12 Annie L Harrell Motor
US1805164A (en) * 1930-01-31 1931-05-12 Stanley Works Shaft holder for applying chucks
US2172440A (en) * 1936-11-18 1939-09-12 Honeywell Regulator Co Automatic brake for motor shafts
US2218168A (en) * 1939-02-27 1940-10-15 Duro Metal Prod Co Power tool
FR860195A (en) * 1939-06-14 1941-01-08 S Van Der Windt & Cie Electric drill
US2597785A (en) * 1948-08-03 1952-05-20 Gen Railway Signal Co Latching means for electric motor shafts

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1040327A (en) * 1911-07-01 1912-10-08 Miles S Hollis Stop-cock.
US1384256A (en) * 1920-06-07 1921-07-12 Annie L Harrell Motor
US1805164A (en) * 1930-01-31 1931-05-12 Stanley Works Shaft holder for applying chucks
US2172440A (en) * 1936-11-18 1939-09-12 Honeywell Regulator Co Automatic brake for motor shafts
US2218168A (en) * 1939-02-27 1940-10-15 Duro Metal Prod Co Power tool
FR860195A (en) * 1939-06-14 1941-01-08 S Van Der Windt & Cie Electric drill
US2597785A (en) * 1948-08-03 1952-05-20 Gen Railway Signal Co Latching means for electric motor shafts

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2881866A (en) * 1953-12-10 1959-04-14 Perfect Circle Corp Brake means
US2876369A (en) * 1955-04-28 1959-03-03 Dormeyer Corp Portable power drill
US2872197A (en) * 1957-09-10 1959-02-03 Singer Mfg Co Portable tools with selective means for locking spindle
US3044091A (en) * 1960-04-22 1962-07-17 Nishihama Archie Akira Tool attaching means for circular rubbing machines
US3334448A (en) * 1964-03-20 1967-08-08 Rockwell Mfg Co Spindle lock for a power tool
US3848522A (en) * 1972-07-10 1974-11-19 Mc Graw Edison Co Rotisserie spit mounting means
US4213622A (en) * 1978-02-17 1980-07-22 Roehm Guenter H Lockable chuck for hammer drill
US5430944A (en) * 1991-01-09 1995-07-11 Robert Bosch Gmbh Electric rotary hand tool, especially hand circular saw
WO1992011972A1 (en) * 1991-01-09 1992-07-23 Robert Bosch Gmbh Electric rotary hand tool, especially hand circular saw
WO1993006611A1 (en) * 1991-09-23 1993-04-01 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
US5191968A (en) * 1991-09-23 1993-03-09 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
US5346342A (en) * 1993-03-19 1994-09-13 Ryobi Motor Products Corp. Shaft lock arrangment for a power tool
US20070062715A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Switch for power tool
US20070062005A1 (en) * 2005-09-16 2007-03-22 Robert Bosch Gmbh Handle for power tool
US7261166B2 (en) 2005-09-16 2007-08-28 Robert Bosch Gmbh Switch for power tool
US7424768B2 (en) 2005-09-16 2008-09-16 Credo Technology Corporation Handle for power tool
US7547167B2 (en) 2005-09-16 2009-06-16 Robert Bosch Gmbh Storage drawer for hand-held power tool

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