WO1993001027A1 - Bohrhammer - Google Patents
Bohrhammer Download PDFInfo
- Publication number
- WO1993001027A1 WO1993001027A1 PCT/DE1992/000559 DE9200559W WO9301027A1 WO 1993001027 A1 WO1993001027 A1 WO 1993001027A1 DE 9200559 W DE9200559 W DE 9200559W WO 9301027 A1 WO9301027 A1 WO 9301027A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide tube
- hammer
- tool holder
- ring
- drill according
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
- B25D17/084—Rotating chucks or sockets
- B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
-
- 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
- B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/06—Means for driving the impulse member
- B25D2211/061—Swash-plate actuated impulse-driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/003—Details relating to chucks with radially movable locking elements
- B25D2217/0038—Locking members of special shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/003—Details relating to chucks with radially movable locking elements
- B25D2217/0038—Locking members of special shape
- B25D2217/0042—Ball-shaped locking members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/003—Details relating to chucks with radially movable locking elements
- B25D2217/0053—Devices for securing the tool retainer to the machine part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/191—Ram catchers for stopping the ram when entering idling mode
Definitions
- the invention is based on a hammer according to the preamble of claim 1.
- a rotary hammer is known in which, contrary to the otherwise conventional design, the guide tube for the striking mechanism and the tool holder are in two parts. The two parts are connected by locking elements which engage as balls in recesses in both parts, which results in a high selective loading of the parts. For this reason, the guide tube, like the tool holder, had to be tempered or hardened. Otherwise, the construction requires a high level of construction.
- the hammer or hammer drill according to the invention with the characterizing features of claim 1 has the advantage that the high axial forces resulting from the striking mechanism are transmitted over a large area. This enables the use of an uncured guide tube, thereby avoiding delay in hardness and reworking on the guide tube. Last but not least, the lower weight of the components to be hardened is accompanied by a noticeable relief of the environment by omitting hardening steps.
- the use of a resilient profile ring and corresponding grooves, preferably adapted in shape, in the guide tube and in the tool holder avoid shear stresses of the connecting element, so that the profile ring is only subjected to pressure and does not punctually, but only on the components to be connected Surface pressures occur between "hard” and "soft” components.
- the grooves adapt exactly to the shape of the profile rings, so that they support with their entire surface.
- the axial connection according to the invention has the further advantage that the hammer sleeve is easy to manufacture in a plug-in assembly and that the tool holder runs smoothly.
- the contact surface In its inclined position with respect to the longitudinal axis, can be flat or also concavely curved in order to adapt to the external finish of the profile ring used.
- the profile ring can in particular have a circular or oval, rectangular or other cross section.
- a detent ring as a coupling part for a safety clutch, which is fastened by means of a plurality of rollers, which preferably lie linearly in three recesses. This makes the catch ring easily replaceable when worn. A good transmission of the torque between the catch ring and the guide sleeve is possible via the rollers with easy manufacturing possibilities.
- a round ring can advantageously also be attached in the guide tube, which is on a slope of the detent ring may be under tension. The entire construction makes it possible to use a seamlessly drawn or welded soft piece of pipe as the guide tube, which considerably reduces the production costs.
- the construction according to the invention has the further advantage that the connecting means between the guide tube and tool holder as well as the detent ring are very space-saving and enable a hammer sleeve which is also thin-walled in comparison to one-piece designs.
- the connections therefore do not require any additional space, in contrast to the solution according to DE 38 28309 C2.
- Figure 1 shows a longitudinal section through the front part of a rotary hammer
- Figure 2 shows an axial connection in an enlarged view
- Figure 3 shows a perspective view of a hammer sleeve.
- Figure 4 shows a second embodiment.
- a hammer drill has a housing 2 made of plastic, in which a motor, not shown, is housed, which drives an intermediate shaft 3.
- a striking mechanism 4 is accommodated in the housing 2, at the front end of which a tool holder 5 is arranged.
- the striking mechanism 4 lies within a three-part hammer sleeve 6, which consists of a guide tube 7, a tool holder 8 with a longitudinal axis 14 and a detent ring.
- the striking mechanism 4 is guided in the guide tube 7 > which is mounted in the housing 2 and which is designed as a seamlessly drawn or welded uncured tube piece.
- the tool holder 8 can rest against the guide tube 7 inside (as in FIG. 1) or outside.
- the detent ring 9, which serves as part of a safety snap-in coupling 10, also sits on the guide tube 7.
- the safety clutch 10 has rollers 11 as a driving body, which cooperate with locking troughs in the hardened locking ring 9 and with a gear wheel 12.
- the gear wheel 12 is rotatable relative to the guide tube 7 and engages in a toothing 13 of the intermediate shaft 3.
- the two parts 9 "UOd. 12 of the safety clutch 10 are pressed together by a compression spring 15, which determines the latching torque of the clutch.
- the compression spring 15 is secured in a known manner by means of a support disk 18 held in the guide tube 7 by round rings 16, 17.
- the striking mechanism 4 with a pot-shaped, reciprocally driven piston 20 and a striker 21 located therein.
- the energy of the striker 21 driven by the piston 20 is applied to a dropper 22 and from there to a striker (not shown) Transfer tool.
- the piston 20 is guided in the guide tube 7.
- Guide tube 7 and tool holder 8 overlap in a certain area and are connected to one another there by means of a press fit. Careful machining of the easily accessible contact surfaces of the press fit connection simultaneously ensures good concentricity of the tool holder.
- a slotted, resilient profile ring 24 is additionally inserted (see also FIG. 2). This is inserted under prestress into a mounting ring groove 25 in the tool holder 8, which can fully accommodate the profile ring 24.
- the mounting ring groove 25 ends on one side in a contact surface 27 which is inclined at 30 ° -60 °, preferably 45 °, to the longitudinal axis 14.
- the contact surface can also be rounded or concave, but in such a way that at least one part of the contact surface 27 that absorbs compressive forces is inclined approximately by the aforementioned angle to the longitudinal axis 14.
- the guide tube 7 has an annular groove 28 which is preferably adapted to the respective profile of the hardened profile ring 24.
- the profile ring 24 here has a circular cross section and the annular groove 28 has a semicircular cross section.
- the detent ring 9 is connected to the guide tube 7 via three elongated rollers 30.
- the rollers 30 lie in the guide tube 7 in three rectilinear notches 31 which run out at the ends and have a semicircular cross section (see FIG. 3, in which the rollers 30 have been omitted).
- the detent ring 9 has three straight cutouts 3.
- the rollers 30 are first inserted into the notches 31 and then the Rastenring 9 pushed over it.
- an elastic round ring 34 is inserted into a groove in the guide tube 7 from the opposite side, that is to say from the rear.
- the round ring 34 lies against a slope 35 of the detent ring 9.
- the detent ring 9 can be dismantled by removing the round ring 34 and, if necessary, exchanged.
- the hammer sleeve is in two parts and consists of a tool holder and a guide sleeve with an integrally formed detent ring for torque transmission.
- the structure in particular with regard to the axial connection, is the same as the exemplary embodiment shown in the drawing.
- a two-part design also has the advantage that a high-quality material only needs to be used for the tool holder and the guide tube does not have to be subjected to complete heat treatment. It also considerably simplifies and reduces the cost of manufacturing.
- a further advantage is that the components located in the area of the striker can be mounted either from the front or from the rear with a two-part as well as with a three-part hammer sleeve. This is not possible with a one-piece version.
- the profile ring 124 has a square cross section.
- the mounting ring groove 125 with contact surface 127 is unchanged from the first embodiment.
- the mounting position 126 of the profile ring 124 is shown in dashed lines.
- the annular groove 128 also has a similar, flat, inclined contact surface 129 lying obliquely opposite the contact surface 127.
- the annular groove 128 is so limited that it can not fully accommodate the profile ring 124, but only partially in an inclined position.
- the axial connection with the profile ring 24/124 can, in reverse of the arrangement in the exemplary embodiments shown, also be designed such that the mounting ring groove is located in the outer tube part. Then the profile ring is inserted under prestress in the form of a pre-expansion and contracts again after the pipe parts have been joined together.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59203993T DE59203993D1 (de) | 1991-07-08 | 1992-07-06 | Bohrhammer. |
US07/989,005 US5373905A (en) | 1991-07-08 | 1992-07-06 | Hammer drill |
EP92914235A EP0552328B1 (de) | 1991-07-08 | 1992-07-06 | Bohrhammer |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4122516.3 | 1991-07-08 | ||
DE4122516 | 1991-07-08 | ||
DE4215288A DE4215288A1 (de) | 1991-07-08 | 1992-05-09 | Bohrhammer |
DEP4215288.7 | 1992-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993001027A1 true WO1993001027A1 (de) | 1993-01-21 |
Family
ID=25905294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1992/000559 WO1993001027A1 (de) | 1991-07-08 | 1992-07-06 | Bohrhammer |
Country Status (4)
Country | Link |
---|---|
US (1) | US5373905A (de) |
EP (1) | EP0552328B1 (de) |
DE (2) | DE4215288A1 (de) |
WO (1) | WO1993001027A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6732815B2 (en) | 2001-03-07 | 2004-05-11 | Black & Decker, Inc. | Hammer |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19540396A1 (de) * | 1995-10-30 | 1997-05-07 | Hilti Ag | Bohr- und/oder Meisselgerät |
DE19634346A1 (de) * | 1996-08-26 | 1998-03-05 | Schaeffler Waelzlager Kg | Mit einem Luftpolsterschlagwerk versehenes Schlagwerkzeug |
DE19707588B4 (de) * | 1997-02-26 | 2005-08-18 | Robert Bosch Gmbh | Werkzeugmaschine, insbesondere Bohr- bzw. Schlagbohrmaschine oder Bohrhammer |
DE19717712A1 (de) * | 1997-04-18 | 1998-10-22 | Black & Decker Inc | Bohrhammer |
DE19955412A1 (de) * | 1999-11-18 | 2001-05-23 | Hilti Ag | Bohr- und Meisselgerät |
GB0008465D0 (en) | 2000-04-07 | 2000-05-24 | Black & Decker Inc | Rotary hammer mode change mechanism |
GB0105547D0 (en) | 2001-03-07 | 2001-04-25 | Black & Decker Inc | Tool holder for a rotary hammer or a chisel hammer |
DE10140319A1 (de) * | 2001-08-16 | 2003-03-13 | Bosch Gmbh Robert | Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer |
GB0121947D0 (en) | 2001-09-12 | 2001-10-31 | Black & Decker Inc | Tool holder for hammer |
US7021401B2 (en) * | 2001-10-26 | 2006-04-04 | Black & Decker Inc. | Hammer |
GB0213289D0 (en) * | 2002-06-11 | 2002-07-24 | Black & Decker Inc | Rotary hammer |
GB0214772D0 (en) * | 2002-06-26 | 2002-08-07 | Black & Decker Inc | Hammer |
GB2394516A (en) * | 2002-10-23 | 2004-04-28 | Black & Decker Inc | Power tool |
DE10253972A1 (de) * | 2002-11-20 | 2004-06-03 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere Bohr- oder Schlaghammer |
DE10253973A1 (de) * | 2002-11-20 | 2004-06-03 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere Bohr- oder Schlaghammer |
EP1468789A3 (de) | 2003-04-17 | 2008-06-04 | BLACK & DECKER INC. | Kupplung für rotierendes Kraftwerkzeug und rotierendes Kraftwerkzeug mit einer solchen Kupplung |
GB2401410A (en) * | 2003-05-03 | 2004-11-10 | Black & Decker Inc | An overload clutch having an elastomeric O-ring stop and tapered splines |
GB2401570B (en) * | 2003-05-12 | 2006-07-05 | Black & Decker Inc | Spindle assembly for hammer drill |
GB0311045D0 (en) * | 2003-05-14 | 2003-06-18 | Black & Decker Inc | Rotary hammer |
DE102004020177A1 (de) * | 2004-04-24 | 2005-11-17 | Robert Bosch Gmbh | Handwerkzeugmaschine mit einem drehenden und/oder schlagenden Antrieb |
GB2414701A (en) * | 2004-06-05 | 2005-12-07 | Black & Decker Inc | Rotary spindle for a power tool |
DE102004034268B3 (de) * | 2004-07-15 | 2005-12-29 | Wacker Construction Equipment Ag | Bohrhammer mit Sicherheitskupplung |
DE102004058686A1 (de) * | 2004-09-03 | 2006-03-09 | Robert Bosch Gmbh | Elektrowerkzeug mit einem zwischen den Betriebsarten Bohren, Schlagbohren, Meißeln umschaltbaren Antrieb |
EP1674207B1 (de) * | 2004-12-23 | 2008-12-10 | BLACK & DECKER INC. | Kraftwerkzeug |
GB2422569A (en) * | 2005-01-26 | 2006-08-02 | Black & Decker Inc | Rotary hammer |
US20080296034A1 (en) * | 2006-06-06 | 2008-12-04 | Willy Braun | Percussion Mechanism with a Striking Pin and an Associated Catching Mechanism |
CN101489731A (zh) * | 2006-07-10 | 2009-07-22 | 罗伯特·博世有限公司 | 手持式工具机 |
CA2555533A1 (en) * | 2006-08-08 | 2008-02-08 | Fern Beauchamp | Hammer drill bit chuck attachment |
DE102006061627A1 (de) * | 2006-12-27 | 2008-07-10 | Robert Bosch Gmbh | Schlagwerk einer Elektrohandwerkzeugmaschine |
DE102007001494B3 (de) * | 2007-01-10 | 2008-07-10 | Aeg Electric Tools Gmbh | Handgeführter Bohrhammer |
DE102007000255A1 (de) * | 2007-05-03 | 2008-11-06 | Hilti Aktiengesellschaft | Handwerkzeugmaschine mit geschmiertem Schlagwerk |
DE102007000365A1 (de) * | 2007-07-04 | 2009-01-08 | Hilti Aktiengesellschaft | Handwerkzeuggerät mit Rutschkupplung |
CN101444909B (zh) * | 2007-11-27 | 2013-03-27 | 希尔蒂股份公司 | 具有气动冲击装置的手持式工具机 |
JP5431000B2 (ja) * | 2009-04-01 | 2014-03-05 | 株式会社マキタ | ハンマードリル |
DE102010002672A1 (de) * | 2010-03-09 | 2011-09-15 | Robert Bosch Gmbh | Bohrhammervorrichtung |
DE102011007660A1 (de) * | 2011-04-19 | 2012-10-25 | Hilti Aktiengesellschaft | Handwerkzeugmaschine und Herstellungsverfahren |
JP2012254513A (ja) * | 2011-06-10 | 2012-12-27 | Makita Corp | 打撃工具 |
DE102011080800A1 (de) * | 2011-08-11 | 2013-02-14 | Hilti Aktiengesellschaft | Handwerkzeugmaschine |
DE102011081617A1 (de) * | 2011-08-26 | 2013-02-28 | Hilti Aktiengesellschaft | Handgehaltene Werkzeugmaschine |
WO2022246207A1 (en) * | 2021-05-21 | 2022-11-24 | Milwaukee Electric Tool Corporation | Chisel hammer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2171631A (en) * | 1985-02-26 | 1986-09-03 | Bosch Gmbh Robert | Hammer drill |
DE3828309A1 (de) * | 1988-08-20 | 1990-02-22 | Bosch Gmbh Robert | Bohrhammer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2242944B2 (de) * | 1972-08-31 | 1981-04-23 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrhammer |
DE2252951B2 (de) * | 1972-10-28 | 1981-09-10 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrhammer |
DE3429140A1 (de) * | 1984-08-08 | 1986-02-20 | Black & Decker Inc., Newark, Del. | Bohrhammer mit einem pneumatischen schlagwerk |
-
1992
- 1992-05-09 DE DE4215288A patent/DE4215288A1/de not_active Withdrawn
- 1992-07-06 WO PCT/DE1992/000559 patent/WO1993001027A1/de active IP Right Grant
- 1992-07-06 EP EP92914235A patent/EP0552328B1/de not_active Expired - Lifetime
- 1992-07-06 DE DE59203993T patent/DE59203993D1/de not_active Expired - Lifetime
- 1992-07-06 US US07/989,005 patent/US5373905A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2171631A (en) * | 1985-02-26 | 1986-09-03 | Bosch Gmbh Robert | Hammer drill |
DE3828309A1 (de) * | 1988-08-20 | 1990-02-22 | Bosch Gmbh Robert | Bohrhammer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6732815B2 (en) | 2001-03-07 | 2004-05-11 | Black & Decker, Inc. | Hammer |
US6948571B2 (en) | 2001-03-07 | 2005-09-27 | Black & Decker Inc. | Hammer |
Also Published As
Publication number | Publication date |
---|---|
DE4215288A1 (de) | 1993-01-14 |
DE59203993D1 (de) | 1995-11-16 |
US5373905A (en) | 1994-12-20 |
EP0552328B1 (de) | 1995-10-11 |
EP0552328A1 (de) | 1993-07-28 |
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