EP2129494A1 - Handwerkzeugmaschine - Google Patents
HandwerkzeugmaschineInfo
- Publication number
- EP2129494A1 EP2129494A1 EP08708625A EP08708625A EP2129494A1 EP 2129494 A1 EP2129494 A1 EP 2129494A1 EP 08708625 A EP08708625 A EP 08708625A EP 08708625 A EP08708625 A EP 08708625A EP 2129494 A1 EP2129494 A1 EP 2129494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hammer piston
- hammer
- axial distance
- piston
- hand tool
- 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
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
- B25D11/062—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
- B25D16/006—Mode changers; Mechanisms connected thereto
-
- 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
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/065—Details regarding assembling of the tool
Definitions
- the invention relates to a hand tool according to the preamble of claim 1.
- the handheld power tool comprises a transmission device which has a shift path length extending in the axial direction.
- the invention is based on a hand-held power tool with a percussion mechanism, which has a guided over a guide length racket and a hammer piston having a contact point and a Wirkbo- with an active bottom surface, and with a transmission device having a running in the axial direction Wegauer.
- a "contact point” is to be understood in particular a point which is provided for applying a drive bearing, in particular a wobble finger of the drive bearing, to the hammer piston and through which a pivot axis of a relative pivoting movement of the wobble finger with respect to the hammer piston "Wirkitz” should be a thug the percussion facing portion of the hammer piston are understood, which reciprocates to produce a shock pulse of the racket in a translational direction.
- guide length should be understood to mean, in particular, a length of a guide tube, such as a hammer tube or a pot piston, over which a guide surface joins Leadership of the racket extends.
- the percussion can be particularly simple and inexpensive in different hand tool machines with different transmission devices that have different Druckwegenburgn integrated.
- this can be achieved if the contact point and the active bottom surface have an axial distance which has at least the entire Wegensteinbone and / or at least 30% of the guide length of the racket.
- the axial distance at least twice the Wennwegenburg and / or at least 50% of the guide length of the racket, and more preferably at least the entire guide length of the racket.
- the hammer piston along the axial distance has a substantially constant diameter, whereby a particularly simple production of the hammer piston can be achieved.
- a substantially identical diameter is to be understood in particular as meaning that the diameter can only change along one edge region along the axial distance, Preferably, the edge region is at most 20% of the axial distance and particularly advantageously at most 10% of the axial distance.
- the hammer piston has a connecting web which extends at least partially along the axial distance, it is possible in this case to achieve an in particular a lightweight hammer piston with an advantageous material saving during manufacture.
- FIG. 1 shows a hand tool according to the invention in a side view
- FIG. 2 is a partial section of a hand tool with a percussion mechanism according to the invention in a schematic sectional view
- Fig. 3 shows a hammer piston in a side view
- Fig. 4 shows an alternative hammer piston in a side view
- Fig. 5 shows a further hammer piston in a side view
- Fig. 6 shows a further hammer piston in a side view.
- FIG. 1 shows a hand tool 10a formed by a hammer drill.
- the hand tool 10a comprises a housing 40a and in a front region a tool holder 42a for receiving a tool.
- the handheld power tool 10a comprises a main handle 44a for actuating the handheld power tool 10a and for transmitting force from an operator to the handheld power tool 10a.
- the hand tool 10a a drive unit 46a formed by an electric motor.
- the torque of the drive unit 46a formed by a drive torque is transmitted via a gear device 22a of the handheld power tool 10a to a pneumatic impact mechanism 12a and / or to a rotating output means formed by a hammer tube 48a (FIG. 2).
- the transmission device 22a has an intermediate shaft 50a, at the drive-side end of which a gear 52a is arranged, by means of which the drive torque of the drive unit 46a during operation of the
- Hand tool 10a is transmitted to the intermediate shaft 50a.
- the drive torque is transmitted to a drive bearing 56a and / or to a gear 72 of the gear device 22a via a driving toothing 54a pressed onto the intermediate shaft 50a to produce a rotation of the hammer tube 48a or of a tool located in the tool receptacle 42a.
- the hammer mechanism 12a comprises a hammer piston 14a, a beater 32a and an anvil 58a (FIG. 2).
- the hammer piston 14a which is formed by a pot piston 38a, has an active bottom 18a with an active bottom surface 20a and a coupling point 60a for coupling a wobble finger 62a of the drive bearing 56a (FIGS. 2 and 3).
- the coupling point 60a comprises a circular recess 64a.
- a contact point 16a is arranged which lies on a pivot axis 66a of the wobble finger 62a, the pivot axis 66a being arranged perpendicular to the plane of the drawing (FIG. 3).
- the active base 18a is arranged in a region of the hammer piston 14a facing the racket 32a and, during operation of the handheld power tool 10a, moves back and forth along an axial direction 24a to generate a striking pulse.
- the active bottom surface 20a is the surface of the active bottom 18a facing the racket 32a.
- a piston cylinder 68a of the hammer piston 14a is arranged, in which the racket 32a is guided.
- the transmission device 22a has two different gear stages to a transmission of two different drive speeds or rotational speeds to the hammer tube 48a or on a rotatably connected to the hammer tube 48a gear unit 70a.
- two toothed wheels 72a, 74a are mounted on the intermediate shaft 50a, the first toothed wheel 72a being rotatably connected to the intermediate shaft 50a and also being displaceably mounted on the intermediate shaft 50a along the axial direction 24a.
- the first gear 72a is displaced by one Heidelbergwegner 26a on the intermediate shaft 50a, wherein in a first switching position, the first gear 72a, the driving torque on the hammer tube 48a and the gear unit 70a and in a second switching position on the second gear 74a transmits. From the second gear 74a, the drive torque is further transmitted to the gear unit 70a.
- the gear unit 70a comprises two transmission stages, which correspond to a respective one of the two gear wheels 72a, 74a to a drive torque transmission ( Figure 2).
- Shifting between the different gear stages within the transmission device 22a requires a longer alignment of the gear unit 22a in the axial direction 24a by at least the shift path length 26a than a conventional one-gear transmission device 22a.
- the longer orientation of the transmission device 22a is accommodated within the striking mechanism 12a by means of the hammer piston 14a.
- An axial distance 28a between the active bottom surface 20a and the contact point 16a is greater than the Wegwegner 26a and equal to a guide length 30a of the racket 32a within the piston cylinder 68a.
- the racket 32a is guided inside the piston cylinder 68a, the guide length 30a being composed of a sum of a thickness 84a of the racket 32a and a difference between an end position 86a facing the active bottom area 20a and an end position 88a facing away from the active floor area 20a (FIG. FIGS. 2 and 3).
- the hammer piston 14a has a substantially equal diameter 36a.
- FIGS. 4 to 6 each show an alternative hammer piston 14 of a percussion mechanism to those of FIGS. 1 to 3.
- Substantially identical components, features and functions are basically additionally numbered with the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiments, the letters a to d are added. The following description is essentially limited to the differences from the exemplary embodiment in FIGS. 1 to 3, wherein reference can be made to the description of the exemplary embodiment in FIGS. 1 to 3 with regard to components, features and functions remaining the same.
- FIG. 4 shows a further hammer piston 14b with a piston cylinder 68b.
- the hammer piston 14b has a coupling point 60b, which is formed by a web-shaped recess 64b.
- the hammer piston 14b has a same diameter 36b.
- a diameter 76b of the hammer piston 14b is smaller than the diameter 36b along the axial distance 28b.
- the hammer piston 14b has a concave shape 78b on a radially outwardly directed surface 80b of the hammer piston 14b.
- FIG. 5 shows a further hammer piston 14c with a piston cylinder 68c.
- the hammer piston 14c has a coupling point 60c, which is formed by a web-shaped recess 64c.
- the web-shaped recess 64c extends along an axial distance 28c between an active bottom surface 20c and an abutment point 16c substantially along an entire active bottom 18c of the hammer piston 14c.
- the hammer piston 14c also has a same diameter 36c.
- FIG. 6 shows a further hammer piston 14d with a piston cylinder 68d.
- the hammer piston 14d has a coupling point 6Od, which is formed by a web-shaped recess 64d.
- the hammer piston 14d has a connecting web 34d which has a smaller diameter 82d than a diameter 36d in the region of the active bottom surface 20d and a diameter 76d in the region of the coupling point 6d.
- the hammer piston 14d has a concave formation 78d on a radially outwardly directed surface 8Od of the hammer piston 14d.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710010181 DE102007010181A1 (de) | 2007-03-02 | 2007-03-02 | Handwerkzeugmaschine |
PCT/EP2008/051321 WO2008107251A1 (de) | 2007-03-02 | 2008-02-04 | Handwerkzeugmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2129494A1 true EP2129494A1 (de) | 2009-12-09 |
EP2129494B1 EP2129494B1 (de) | 2016-04-13 |
Family
ID=39362853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08708625.2A Not-in-force EP2129494B1 (de) | 2007-03-02 | 2008-02-04 | Handwerkzeugmaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2129494B1 (de) |
CN (1) | CN101622103B (de) |
DE (1) | DE102007010181A1 (de) |
WO (1) | WO2008107251A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041889A1 (de) * | 2008-09-09 | 2010-03-11 | Robert Bosch Gmbh | Werkzeugmaschine und Herstellverfahren für eine Werkzeugmaschine |
CN117444906A (zh) * | 2017-09-30 | 2024-01-26 | 苏州宝时得电动工具有限公司 | 电锤 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3039631A1 (de) * | 1980-10-21 | 1982-05-27 | Robert Bosch Gmbh, 7000 Stuttgart | Bohrhammer |
EP0303651B2 (de) * | 1987-03-05 | 1999-12-01 | Robert Bosch Gmbh | Verfahren zum unterbrechen der antriebstätigkeit, insbesondere der schlag- und/oder drehantriebstätigkeit, einer handwerkzeugmaschine |
DE19540391A1 (de) * | 1995-10-30 | 1997-05-07 | Hilti Ag | Bohr- und Meisselgerät |
GB2394437A (en) * | 2002-10-23 | 2004-04-28 | Black & Decker Inc | Hammer including a piston with wear-reducing washers |
CN2685020Y (zh) * | 2004-03-05 | 2005-03-16 | 王晓冬 | 新型电锤 |
-
2007
- 2007-03-02 DE DE200710010181 patent/DE102007010181A1/de not_active Withdrawn
-
2008
- 2008-02-04 CN CN2008800069086A patent/CN101622103B/zh not_active Expired - Fee Related
- 2008-02-04 EP EP08708625.2A patent/EP2129494B1/de not_active Not-in-force
- 2008-02-04 WO PCT/EP2008/051321 patent/WO2008107251A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008107251A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101622103A (zh) | 2010-01-06 |
DE102007010181A1 (de) | 2008-09-04 |
EP2129494B1 (de) | 2016-04-13 |
WO2008107251A1 (de) | 2008-09-12 |
CN101622103B (zh) | 2012-07-18 |
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