EP0719616A1 - Verbessertes oszillierendes Handwerkzeug - Google Patents
Verbessertes oszillierendes Handwerkzeug Download PDFInfo
- Publication number
- EP0719616A1 EP0719616A1 EP95308370A EP95308370A EP0719616A1 EP 0719616 A1 EP0719616 A1 EP 0719616A1 EP 95308370 A EP95308370 A EP 95308370A EP 95308370 A EP95308370 A EP 95308370A EP 0719616 A1 EP0719616 A1 EP 0719616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- shoe
- drive
- face
- location hole
- 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.)
- Granted
Links
Images
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
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
-
- 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
Definitions
- the present invention relates to a powered oscillating hand tool, in particular an orbital sander, comprising a drive unit having an electric motor with a drive shaft to which a working head, for example a sanding shoe can be attached.
- the drive system comprises an eccentric which is restrained so that the sander shoe cannot spin independently of the motor and it therefore describes a regular orbit.
- the shoes of such sanders are available in a range of shapes and such sanders are in general used for the removal of relatively small quantities of material, for example for detailed work or for finishing. By choice of a suitably shaped shoe, it is possible to access areas which are inaccessible with a random orbit sander.
- the restraining mechanism by which the eccentric is restrained so that the sander shoe cannot spin independently of the motor and therefore describes a regular orbit generally comprises a co-operating array of legs and spigots on the shoe and the sander body respectively.
- the location hole on the shoe, in which the drive shaft locates it is necessary for the location hole on the shoe, in which the drive shaft locates, to be centrally positioned on the shoe. This leads to difficulties in locating the location hole of the shoe on the second (eccentric) drive shaft at the same time as locating the corresponding legs and spigots.
- For the shaft to match the location hole on the shoe it is necessary to deform the legs during this location.
- sanders have hence been either of the orbital type as described above, with a fixed shoe or of the random orbit type in which a circular platen is driven by a drive system which comprises an eccentric bearing so that the platen can spin independently of the motor, and the platen describes a random orbit.
- the drive shaft to which the sander head is attachable, and the hole by which the head is mounted on the shaft are each of generally circular section, flatted on opposite faces to assist in retaining the head on the sander.
- This design is more expensive to manufacture than a circular section and has the further disadvantage that when the user locates the head on the shaft, it is necessary to align the opposed flats on the shaft and head correctly, in order to avoid damage to the head or the shaft.
- It is an object of the present invention to provide a powered oscillating hand tool comprising a drive unit having an electric motor with a drive shaft to which a sander head can be attached, in which the attachment means by which the sander head is attachable to the drive shaft is particularly convenient.
- the present invention therefore provides a powered oscillating hand tool comprising
- the attachment means according to the invention by which the sander head is attachable to the drive shaft is suitable for use in any powered oscillating hand tool which is provided with interchangeable heads and is particularly suitable for use in a dual function powered oscillating hand tool comprising
- the invention thus provides a powered oscillating power tool which can easily be fitted with an orbital sander shoe or with an alternative sander head, such as a differently shaped sanding shoe or a random orbit sander head without requiring deformation of the restraining legs.
- Figures 1 and 2 show a drive unit (2) including an electric motor (not shown) located in upper housing (4) and driving shaft (6).
- a fan (8) mounted on shaft (6) is arranged to draw air in from mouth (10) of lower housing (12) and direct it through extractor duct (14) to exhaust outlet (16).
- a screw (18) and washer (20) are used to secure a sanding shoe (22) to a second drive shaft (24) which is housed in the fan (8) by bearing (26) which is eccentrically located radially in respect to shaft (8).
- the second drive shaft (24) comprises a first section (28), a flange (30) and a drive spigot (32).
- a first end (34) of the first section (28) is adapted for mounting in the bearing (26) and the flange (30) is mounted on the first section (28) at the second end (36) of the first section.
- the second drive shaft (24) terminates in a drive spigot (32).
- Two pairs of spigots (40) are arranged in an array within the lower housing (12), around the mouth (10) of the housing (12).
- the sanding shoe (22) is provided with a location hole (42) for location of the drive spigot (32).
- Two pairs of hollow, tapering, flexible columns (44) made of rubber are arranged, in an array matching that of the housing spigots (40), on the backing face (46) of the shoe (22).
- a perforated sandpaper sheet may be attached to the outer face (50) of the shoe (22), for ex ample by the use of hook-and-loop fabric such as that sold as VELCRO (RTM) glued to face (50). Holes (52) passing through the shoe (22) facilitate the removal of dust etc, from the sanding face through the shoe (22) to exhaust outlet (16) via the duct (14). An extractor hose (not shown) may be attached to the exhaust outlet (16).
- the second drive shaft (24) comprises a first section (28), a flange (30) and a drive spigot (32).
- a first end (34) of the first section (28) is adapted for mounting in the bearing (26) and the flange (30) is mounted on the first section (28) at the second end (36) of the first section.
- the second drive shaft (24) terminates in the drive spigot (32).
- the drive spigot (32) tapers from a diameter d 1 at its face adjoining the flange (30) to a diameter d 2 at its free end.
- the location hole (42) of the shoe (22) has a diameter d 3 at the backing face (46) of the shoe (22), and a diameter d 4 at the outer face (50) of the shoe (22 .
- the motor axis A M is offset from the axis A B of the eccentric bearing (26) by a radial eccentricity e.
- the flexible columns (44) are located on the spigots (40) and the drive spigot (32) of the second drive shaft (24) is aligned sufficiently with the location hole (42) of the shoe (22) for the drive spigot (32) to be guided into the location hole (4) as the screw (18) is tightened and the shoe (22) secured to the second drive shaft (24).
- the powered oscillating hand tool according to the invention is particularly adapted for use with sanding heads such as orbital sanding shoes and random orbit sanding platens, it is of course within the scope of the invention to provide a tool to which further alternative oscillating heads can be attached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29521328U DE29521328U1 (de) | 1994-12-24 | 1995-11-22 | Verbessertes oszillierendes, handgeführtes Werkzeug |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9426259.9A GB9426259D0 (en) | 1994-12-24 | 1994-12-24 | Improved oscillating hand tool |
GB9426259 | 1994-12-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0719616A1 true EP0719616A1 (de) | 1996-07-03 |
EP0719616B1 EP0719616B1 (de) | 1997-12-29 |
Family
ID=10766622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950308370 Expired - Lifetime EP0719616B1 (de) | 1994-12-24 | 1995-11-22 | Verbessertes oszillierendes Handwerkzeug |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0719616B1 (de) |
DE (1) | DE69501313T2 (de) |
GB (1) | GB9426259D0 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000071296A1 (de) * | 1999-05-19 | 2000-11-30 | Vaassen, Eugen | Vibrationsvorrichtung |
EP1674202A1 (de) * | 2004-12-23 | 2006-06-28 | Black & Decker, Inc. | Modularer Aufbau eines Handschleifgerätgehäuses |
NL1030176C2 (nl) * | 2005-10-12 | 2007-04-17 | Bosch Gmbh Robert | Handgereedschap met verbeterde aandrijving. |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008012784A1 (de) | 2008-03-05 | 2009-09-10 | Kwm Entwicklungs-, Vertriebs- Und Service Gmbh | Verfahren zum Herstellen einer Arbeitsgerätschaft |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1194150A (en) | 1967-12-18 | 1970-06-10 | Gaf Corp | Stilbene Monoazo Dyestuffs |
FR2104073A5 (de) * | 1970-08-08 | 1972-04-14 | Bosch | |
DE3805926A1 (de) * | 1988-02-25 | 1989-09-07 | Bosch Gmbh Robert | Handaggregat mit oszillierender werkzeugbewegung |
EP0525328A1 (de) * | 1991-06-05 | 1993-02-03 | Robert Bosch Gmbh | Exzenterschleifer |
-
1994
- 1994-12-24 GB GBGB9426259.9A patent/GB9426259D0/en active Pending
-
1995
- 1995-11-22 EP EP19950308370 patent/EP0719616B1/de not_active Expired - Lifetime
- 1995-11-22 DE DE1995601313 patent/DE69501313T2/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1194150A (en) | 1967-12-18 | 1970-06-10 | Gaf Corp | Stilbene Monoazo Dyestuffs |
FR2104073A5 (de) * | 1970-08-08 | 1972-04-14 | Bosch | |
DE3805926A1 (de) * | 1988-02-25 | 1989-09-07 | Bosch Gmbh Robert | Handaggregat mit oszillierender werkzeugbewegung |
EP0525328A1 (de) * | 1991-06-05 | 1993-02-03 | Robert Bosch Gmbh | Exzenterschleifer |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000071296A1 (de) * | 1999-05-19 | 2000-11-30 | Vaassen, Eugen | Vibrationsvorrichtung |
EP1674202A1 (de) * | 2004-12-23 | 2006-06-28 | Black & Decker, Inc. | Modularer Aufbau eines Handschleifgerätgehäuses |
US7198559B2 (en) | 2004-12-23 | 2007-04-03 | Black & Decker, Inc. | Modular sander-casing architecture |
CN1792568B (zh) * | 2004-12-23 | 2012-04-25 | 布莱克和戴克公司 | 组合式打磨机外壳结构 |
NL1030176C2 (nl) * | 2005-10-12 | 2007-04-17 | Bosch Gmbh Robert | Handgereedschap met verbeterde aandrijving. |
WO2007043871A1 (en) * | 2005-10-12 | 2007-04-19 | Robert Bosch Gmbh | Hand tool with improved drive |
Also Published As
Publication number | Publication date |
---|---|
GB9426259D0 (en) | 1995-02-22 |
DE69501313D1 (de) | 1998-02-05 |
DE69501313T2 (de) | 1998-04-16 |
EP0719616B1 (de) | 1997-12-29 |
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