EP0885690B1 - Lösbare Sperreinrichtung - Google Patents

Lösbare Sperreinrichtung Download PDF

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Publication number
EP0885690B1
EP0885690B1 EP98304734A EP98304734A EP0885690B1 EP 0885690 B1 EP0885690 B1 EP 0885690B1 EP 98304734 A EP98304734 A EP 98304734A EP 98304734 A EP98304734 A EP 98304734A EP 0885690 B1 EP0885690 B1 EP 0885690B1
Authority
EP
European Patent Office
Prior art keywords
members
detent means
locking mechanism
groove
releasable locking
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
EP98304734A
Other languages
English (en)
French (fr)
Other versions
EP0885690A2 (de
EP0885690A3 (de
Inventor
Daniel Bone
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.)
Black and Decker Inc
Original Assignee
Black and Decker 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 Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0885690A2 publication Critical patent/EP0885690A2/de
Publication of EP0885690A3 publication Critical patent/EP0885690A3/de
Application granted granted Critical
Publication of EP0885690B1 publication Critical patent/EP0885690B1/de
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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors

Definitions

  • the present invention relates to a releasable locking mechanism for a power tool configured to couple a first member of the tool to a second member of the tool and comprising: manually operable detent means mounted on one of the first and second members, at least one locking member arranged for co-operation with the detent means and mounted on the other of the first and second members; the first and second members, when coupled, being held rigidly to one another and arranged to be selectively coupled to one another in more than one orientation via the detent means and the at least one locking member, which detent means and the at least one locking member are permanently attached to their respective first or second members on which they are mounted, thereby to achieve coupling of the first and second members without the need for separate tools.
  • Locking mechanisms such as those described hereabove have been known, for example, from powered sanders such as that described in European Patent Application number EP 0 694 365.
  • the user of the sander may wish to utilise different platens for different sanding operations.
  • a random orbit sanding platen will be used by the do-it-yourself (DIY) or hobbyist.
  • DIY do-it-yourself
  • detail work This entails the fine, delicate finishing of the surface of the workpiece prior to varnishing or repainting.
  • the pure orbital platen is used for low volume removal, which is required for the detail work.
  • the means by which the platens of the known device are attached to the sander include pieces which are not permanently fixed or mounted to the platens and the sander. Thus there is always the potential for these pieces to become lost and hence completely preclude the possibility of changing over platens.
  • the method by which the platen is released involves a spring-biased latch.
  • the tension in the spring may vary over time and therefore does not provide a reliable means of holding a selected platen in place.
  • a releasable locking mechanism for a power tool as defined in the opening paragraph and a power tool including such a releasable locking mechanism, characterised by the detent means being rotatable to couple with the at least one locking member and including a cam mechanism for urging the detent means into closer coupling with the at least one locking member upon continued rotation of the detent means.
  • the detent means comprises a latch movably secured within a housing and having a groove of varying width formed therein.
  • the latch may be formed as an annulus and the groove of varying width is circumferentially formed around this annulus. This enables a high degree of manual control over the coupling.
  • the at least one locking member comprises a protrusion on the other of the first and second members.
  • the protrusion may comprise an elongate stem bearing an end cap, the end cap having a cross-sectional area larger than the cross-sectional area of the elongate stem. This arrangement provides a convenient way of achieving the coupling between the first and second members.
  • cross-sectional area of the elongate stem may fit within any portion of the groove of the latch, but the cross-sectional area of the end cap to be too large to fit within a portion of the groove.
  • coupling of the first and second members may be achieved by rotation of the latch around the at least one locking member.
  • the distance of the circumferential groove from the centre of the annulus may vary along the length of the groove.
  • the first member of the tool advantageously comprises a base plate and the second member advantageously comprises a platen arranged to be mounted around the base plate.
  • a first member in this example a base plate 2 for a powered sander.
  • the sander to which the base plate is permanently mounted imparts to the base plate 2 an orbital vibrating action.
  • the base plate 2 is mounted to the sander by way of mounting lugs 4.
  • the base plate 2 includes two housings, an open housing 6 and detent housing 8.
  • the open housing 6 has an underside which defines a hollow opening 10. The purpose of this hollow opening 10 will become clear hereafter.
  • the detent housing 8 serves to encapsulate a detent means which will also be described below.
  • the orbital oscillating motion imparted to the base plate 2 is imparted via the axis A-A as seen in Figure 1a.
  • this motion In order for this motion to be itself imparted to a second member of the tool, in this example a sanding platen 12 as shown by referring now also to Figures 3, there needs to be some method of coupling the base plate 2 to the sanding platen 12.
  • the sanding platen 12 has a generally smoothing-iron shaped outer profile 14. This is of well known shape and is used generally within the art of sanding. This will not be described any further herein.
  • the sanding platen 12 also has an inner peripheral shape defined by a recess 16. It will be seen by comparing the recess of Figures 3 with the outer profile of the base plate 2 of Figures 1 and 2, that the recess 16 is designed to mate with the base plate 2. Indeed the base plate 2 fits snugly within the recess 16.
  • the sanding platen 12 of Figures 3a to c it can be seen that within the recess 16 there is arranged at least one locking member, in this example two protrusions 18. It will be further appreciated that when the base plate 2 is snugly fitted within the recess 16 then one of the protrusions 18 will sit within the detent housing 8 and the other protrusion 18 will sit within the hollow opening 10.
  • the sanding platen 12 of Figures 3 a-c may be coupled to the base plate 2 in one of two orientations. That is to say either one of the protrusions 18 may, when the base plate 2 is snugly fitted within the recess 16, fit within either the detent housing 8 or the hollow opening 10.
  • FIG. 4 there is illustrated a detent means shown generally as 24 which, in this example comprises a latch formed as an annulus 26 having a groove 28 of varying width formed therein.
  • the varying width of the groove 28 may best be seen from Figure 4d.
  • the width of the groove 28 varies linearly so as to either reduce or increase along the circumference of the annulus 26.
  • the detent means 24 is permanently housed within the detent housing 8 so as to enable utility of the present invention. It can be seen more clearly from Figure 5 that the detent housing 8 has a collar 30 formed therein. Within this collar 30 the neck 32 of the detent means 24 is arranged to sit. It will be seen that the detent means 24 is rotatable about the neck 32 thereby to also rotate the annulus 26 and therefore the groove 28.
  • each protrusion 18 comprises an elongate stem 34 terminating in an end cap 36. It will also be appreciated that the cross sectional area of the elongate stem 34 is smaller than the cross sectional area of the end cap 36.
  • one end of the groove 28 must be of width larger than the cross sectional area of the elongate stem 34 and the other end of the circumferential groove 28 must be of width smaller than the cross sectional area either of the stem 34 or of the end cap 36.
  • the base plate 2 may be positioned into a snug fitting within the recess 16 of the platen 12.
  • the user may then rotate the detent means 24 so as to cause the groove 28 to catch in a position around the elongate stem 34 but below the end cap 36 and thereby on continued rotation of the detent means 24 cause either the stem 34 or the end cap 36 to be held within the groove 28.
  • a more secure coupling of the base plate 2 to the platen 12 may be achieved if, for example, the radial distance of the groove 28 from the centre of the annulus 26 varies along the length of the groove 28.
  • a cam mechanism may be achieved by which the end cap 36 may be pulled up toward the detent housing 8 as the latch 24 is rotated so as to cause a reduction of this distance.
  • Figure 8 shows a perspective view of a power tool, in this case a powered sander 40, including a releasable locking mechanism according to the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Mechanical Control Devices (AREA)
  • Clamps And Clips (AREA)
  • Lock And Its Accessories (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Seal Device For Vehicle (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Claims (12)

  1. Lösbarer Verriegelungsmechanismus für ein kraftgetriebenes Werkzeug, der konfiguriert ist, um ein erstes Bauteil (2) des Werkzeugs mit einem zweiten Bauteil (12) des Werkzeugs zu koppeln, und aufweist: eine manuell betätigbare Verriegelungseinrichtung (24), die an einem von dem ersten (2) und zweiten (12) Bauteil montiert ist, zumindest einem Verriegelungsbauteil (18), das zum Zusammenwirken mit der Verriegelungseinrichtung (24) ausgestaltet und an dem anderen von dem ersten (2) und zweiten (12) Bauteil montiert ist, wobei das erste (2) und das zweite (12) Bauteil, wenn miteinander gekoppelt, fest aneinander gehalten werden und dazu ausgestaltet sind, um mittels der Verriegelungseinrichtung (24) und des zumindest einen Verriegelungsbauteil (18) wahlweise in mehr als einer Ausrichtung miteinander gekoppelt zu werden, wobei die verriegelungseinrichtung (24) und das zumindest eine Verriegelungsbauteil (18) permanent an dem ersten (2) bzw. zweiten (12) Bauteil angebracht sind, an denen sie montiert sind, um dadurch das Koppeln des ersten (2) und zweiten (12) Bauteils ohne das Erfordernis separater Werkzeuge zu erreichen, wobei der Mechanismus dadurch gekennzeichnet ist, dass die Verriegelungseinrichtung (24) drehbar ist, um mit dem zumindest einen Verrieaelungsbauteil (18) gekoppelt zu werden, und einen Nockenmechanismus (26, 28) aufweist, um die Verriegelungseinrichtung (24) bei fortwährender Drehung' der Verriegelungseinrichtung (24) in engerer Kopplung mit dem zumindest einen Verriegelungsbauteil (18) zu koppeln.
  2. Lösbarer Verriegelungsmechanismus nach Anspruch 1, bei dem die Verriegelungseinrichtung (24) einen. Riegel (24) aufweist, der bewegbar in einem Gehäuse (8) befestigt ist und eine Nut (28) mit variierender Breite aufweist, die darin ausgebildet ist.
  3. Lösbarer Verriegelungsmechanismus nach Anspruch 2, bei dem der Riegel als ein Ring (126) ausgebildet ist und die Nut mit variierender Breite in Umfangsrichtung um diesen Ring (26) herum ausgebildet ist.
  4. Lösbarer Verriegelungsmechanismus nach einem der vorhergehenden Ansprüche, bei dem das zumindest eine Verriegelungsbauteil (18) einen Vorsprung an dem anderen von dem ersten und zweiten Bauteil aufweist.
  5. Lösbares Verriegelungsbauteil nach Anspruch 4, bei dem der Vorsprung einen länglichen Schaft (34) aufweist, der eine Endkappe (36) trägt, wobei die Endkappe einen Querschnittsbereich hat, das größer ist als der Querschnittsbereich von dem länglichen Schaft.
  6. Lösbare Verriegelungseinrichtung nach Anspruch 5, bei der der Querschnittsbereich von dem länglichen Schaft (34) in einen Bereich der Nut (28) des Riegels passt, aber der Querschnittsbereich der Endkappe (36) zu groß ist, um in einen Bereich der Nut zu passen.
  7. Lösbarer Verriegelungsmechanismus nach einem der vorhergehenden Ansprüche, bei dem eine Vielzahl von Verriegelungsbauteilen an dem anderen von dem ersten und dem zweiten Bauteil montiert ist.
  8. Lösbarer Verriegelungsmechanismus nach Anspruch 7, bei dem das erste und das zweite Bauteil in einer von zwei unterschiedlichen Ausrichtungen miteinander gekoppelt sind, wobei diese um 180° voneinander versetzt sind.
  9. Lösbarer Verriegelungsmechanismus nach Anspruch 8, bei dem der Abstand der Umfangsnut von der Mitte des Rings entlang der Länge der Nut variiert.
  10. Lösbarer Verriegelungsmechanismus nach einem der vorhergehenden Ansprüche, bei dem das erste Bauteil des Werkzeugs eine Basisplatte und das zweite Bauteil eine Auflageplatte umfasst, die dazu ausgestaltet ist, um um die Basisplatte herum montiert zu sein.
  11. Kraftgetriebenes Werkzeug mit einem lösbaren Verriegelungsmechanismus nach einem der Ansprüche 1 bis 10.
  12. Kraftgetriebenes Werkzeug nach Anspruch 11, bei dem das kraftgetriebene Werkzeug ein Schleifgerät umfasst.
EP98304734A 1997-06-21 1998-06-16 Lösbare Sperreinrichtung Expired - Lifetime EP0885690B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9713066 1997-06-21
GBGB9713066.0A GB9713066D0 (en) 1997-06-21 1997-06-21 Releasable locking mechanism

Publications (3)

Publication Number Publication Date
EP0885690A2 EP0885690A2 (de) 1998-12-23
EP0885690A3 EP0885690A3 (de) 2000-12-20
EP0885690B1 true EP0885690B1 (de) 2004-08-25

Family

ID=10814670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98304734A Expired - Lifetime EP0885690B1 (de) 1997-06-21 1998-06-16 Lösbare Sperreinrichtung

Country Status (4)

Country Link
EP (1) EP0885690B1 (de)
AT (1) ATE274397T1 (de)
DE (1) DE69825819T2 (de)
GB (1) GB9713066D0 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10046063B4 (de) * 2000-09-18 2008-11-20 Hilti Aktiengesellschaft Handschleifgerät mit Schleifschuh
DE10134296B4 (de) * 2001-07-14 2010-01-28 Hilti Aktiengesellschaft Handgeführte Schleifmaschine
US7101267B2 (en) * 2004-11-16 2006-09-05 Choon Nang Electrical Appliance Mfy., Ltd. Tool holder for power tool
CN107756202B (zh) * 2016-08-15 2023-12-08 苏州宝时得电动工具有限公司 砂光机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4869564A (en) * 1988-08-24 1989-09-26 Nova Office Furniture, Inc. Modular furniture
US5554066A (en) * 1995-02-09 1996-09-10 Proter-Cable Corporation In-line profile sander

Also Published As

Publication number Publication date
ATE274397T1 (de) 2004-09-15
DE69825819T2 (de) 2005-09-01
EP0885690A2 (de) 1998-12-23
GB9713066D0 (en) 1997-08-27
DE69825819D1 (de) 2004-09-30
EP0885690A3 (de) 2000-12-20

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