EP2655018A1 - Portable power tool - Google Patents
Portable power toolInfo
- Publication number
- EP2655018A1 EP2655018A1 EP11805460.0A EP11805460A EP2655018A1 EP 2655018 A1 EP2655018 A1 EP 2655018A1 EP 11805460 A EP11805460 A EP 11805460A EP 2655018 A1 EP2655018 A1 EP 2655018A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- tolerance compensation
- compensation unit
- hand tool
- tool according
- 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.)
- Withdrawn
Links
- 230000008859 change Effects 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
-
- 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
- B25D2216/00—Details of 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
- B25D2216/0069—Locking means
-
- 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
- B25D2250/005—Adjustable tool components; Adjustable parameters
-
- 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
- B25D2250/045—Cams used in percussive tools
-
- 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
- B25D2250/331—Use of bearings
Definitions
- the invention relates to a hand tool, in particular a drill and / or chisel, with a pressure lever, which is intended to perform a switching operation.
- the handheld power tool has a tolerance compensation unit which is provided to effect a tolerance compensation via a change in position of at least one contact surface.
- a “pressure lever” is to be understood as meaning a lever which transmits a movement from one component to another component, in particular transversely to a direction of force, so that the pressure lever is subjected to bending during transmission and performs a switching operation
- Switchching process is to be understood in particular a process in which by the transmission of a movement a clutch is switched on and / or off, and / or a transmission ratio of a transmission device is changed.
- a pressure lever a lever that transmits a switching movement of a hammer tube of a striking mechanism of a hand tool on a drive bearing a drill and / or chisel hammer. This movement performs a switching operation of a coupling integrated in the drive bearing, which activates or deactivates the impact mechanism.
- a “tolerance compensation unit” is to be understood as a unit which is intended, in particular, to compensate for manufacturing and / or assembly-related tolerances of components transmits another component.
- the tolerance compensation unit is provided to effect a change in position of at least one contact surface of the pressure lever.
- This can advantageously be achieved that manufacturing and / or assembly tolerances of a hammer tube and / or a drive bearing and / or the Andschreibhebels can be compensated so that between the contact surface of the Andschreibhebels with the hammer tube and / or the contact surface of the Andschreibhebels with the drive bearing sets a desired game and a proper function is guaranteed.
- further transmission elements can be arranged, such as bearings, in particular needle bearings and / or bearing washers.
- the contact surface can thus be decoupled, for example, from a rotational movement.
- the pressure lever is mounted via a bearing axis, wherein the tolerance compensation unit has at least one bearing arrangement which is provided to support the bearing axis of the pressure lever in a plurality of defined positions.
- a “bearing axis” is to be understood as meaning an axis on which the pressure lever is rotatably mounted.
- “Store in a plurality of defined positions” is understood to mean that the bearing arrangement is intended to support the bearing axis at different positions Example that the bearing axis can be moved and / or rotated within a designated area and that a selected position can be determined by force and / or positive locking.
- the bearing unit may have a clamping device, which is intended to fix a position by force fit, and / or a locking device, wherein a locking element defines a position by snapping.
- the storage unit may have one or more receiving areas, which are designed so that the position of the bearing axis can be determined by repositioning.
- the position of a contact surface of the pressure lever can be determined by a change in position of the bearing axis of the pressure lever.
- the so set tolerance compensation unit can reliably comply with this setting and unwanted adjustment can be avoided.
- the bearing assembly is at least partially formed integrally with a power tool housing.
- integral is to be understood to mean, in particular, materially bonded, for example, by a welding process and / or adhesive process, etc., and particularly advantageously formed, such as by casting and / or die casting
- the bearing assembly may comprise a pin-shaped bolt on which the provided with a recess bearing axis can be inserted.
- the bearing arrangement can have a receiving region, which is formed as a recess and into which one end of the bearing axis can be inserted. This allows a particularly reliable attachment of the bearing assembly can be achieved on the power tool housing. It is a cost-effective production possible, and it can be saved components and assembly costs.
- the bearing axis is rotatably mounted.
- rotatably mounted is to be understood in particular that the bearing unit contains a rotatably mountednacbe-0 rich, which receives the bearing axis or the bearing axis in one
- Receiving area is rotatably mounted.
- an adjustment movement of the bearing axis can be realized, which is suitable for effecting a change in position of a contact surface of the pressure lever.
- the tolerance compensation unit has an eccentric.
- An "eccentric" is to be understood in particular as meaning a contour of a component whose symmetry axis is shifted relative to a symmetry of a main contour and / or an axis of rotation of this component of
- the bearing axis comprises the eccentric.
- the bearing axis has an eccentric 5 on at least one, preferably on both ends.
- the bearing axis has a cylindrical central part and o at least one end with a non-rotating contour.
- a "non-rotating contour” should be understood to mean a contour which prevents a rotational movement by means of a positive fit.
- Figure may in particular be formed as a polygon.
- the contour may be formed as a triangle, hexagon, but preferably as a quadrangle Aus-5 tion to be formed and trained on an outer contour
- the contour is formed as an outer contour
- the bearing assembly has a recess with a coordinated inner contour as a receiving area. Due to the cylindrical middle part, an advantageous, movable mounting of the pressure lever can be achieved.
- the bearing unit may be designed so that the bearing unit contains a rotatably mounted receiving area, in particular an eccentrically rotatably mounted receiving area, and the position change is performed by rotating the receiving area.
- the bearing unit is designed so that the receiving area is fixedly mounted and the bearing axis is moved by repositioning to a next position.
- the tolerance compensation unit has a fixing unit which is provided to fix a movably mounted adjustment means of the tolerance compensation unit in different positions.
- a "fixing unit” is to be understood as a unit which is intended to fix a position by form and / or frictional connection, for example by a clamping device and / or by a latching device in which a latching element fixes a position by latching
- the fixing unit can be designed so that it can be released by an operator, which advantageously allows the tolerance compensation unit to be readjusted simply in order to readjust a tolerance.
- the portable power tool housing has at least one service opening which is provided for adjusting the tolerance compensation unit from the outside.
- a “service opening” is to be understood as meaning an area of the handheld power tool housing which can be easily opened by the operator, for example a cover cap. Opening the operator can reach an adjustment of the tolerance compensation unit and perform an adjustment. This allows the operator to readjust a tolerance if necessary. As a result, the service life of the power tool can advantageously be increased and a service can be carried out easily. It can also be provided several service openings, in particular two service openings. The service openings are advantageously provided in each bearing assembly of the tolerance compensation unit, so that each bearing assembly can be adjusted by an operator.
- the bearing axis can be taken with ends in the bearing assembly, which have a rotatable contour. It can be advantageously achieved that the bearing assemblies can be adjusted individually.
- the tolerance compensation unit can also be designed so that the pressure lever is received directly from the bearing assemblies. It can be dispensed with a bearing axis and other components can be saved.
- FIG. 1 is a schematic representation of a hand tool with a tolerance compensation unit according to the invention
- FIG. 2 shows a detail of a schematic illustration of a hand-held power tool with the tolerance compensation unit according to the invention
- FIG. 3 is a schematic representation of a detail of a bearing assembly of the tolerance compensation unit according to the invention.
- FIG. 6 is a schematic representation of an eccentric of the bearing axis
- FIG. 7 shows a detail of a schematic illustration of the handheld power tool with a tolerance compensation unit according to the invention in a second exemplary embodiment
- FIG. 8 shows a schematic illustration of a bearing axle in a second exemplary embodiment.
- Figure 1 and Figure 2 show a hand tool, which is designed as a hammer drill, with a pressure lever 10a, which is intended to perform a switching operation, and with a tolerance compensation unit 12a, the is provided to cause a tolerance change over a change in position of a contact surface 14a.
- the hand tool machine has a hand tool housing 20a, which comprises two housing shells 68a.
- an electric motor 36a drives a bevel gear 40a via a pinion 38a.
- the bevel gear 40a drives, via an intermediate shaft 42a, a pinion 44a which drives a hammer tube 48a via a toothed wheel 46a.
- the expert transmission device for transmitting the rotational movement from the motor 36a provided on the intermediate shaft 42a.
- the hammer tube 48 a drill chuck 50 a is rotated.
- the hammer tube 48a is displaced in the direction of the bevel gear 40a by the pressure exerted during a drilling operation.
- a force is exerted on a drive bearing 52a via the pressure lever 10a.
- a clutch, not shown, in the interior of the drive bearing 52a establishes a force flow between the bevel gear 40a and a bearing sleeve 54a, so that a wobble finger 56a acts on a piston 58a of a percussion mechanism 60a and reciprocates it reciprocally.
- the hammer tube 48a moves in the opposite direction from the bevel gear 40a, so that the drive bearing 52a is relieved again, the clutch not shown in the drive bearing 52a see the power flow between bevel gear 40a and bearing sleeve 54a interrupts and the impact mode is turned off.
- the tolerance compensation unit 12a is provided to cause a change in position of the contact surfaces 14a of the Andrückhebels 10a.
- the pressure lever 10a is mounted via a bearing axis 16a.
- the tolerance compensation unit 12a has a bearing arrangement 18a, which is provided to support the bearing axis 16a of the pressure lever 10a in a plurality of defined positions.
- the bearing assembly 18a ( Figures 3, 4 and 5) is integrally formed with the power tool housing 20a.
- the tolerance compensation unit 12a has an eccentric 22a.
- the bearing shaft 16a comprises the Ex Center 22a.
- the bearing shaft 16a has a cylindrical central part 24a and two ends 26a with a non-rotating contour 28a.
- the cylindrical middle part 24a serves for the movable mounting of the pressing lever 10a.
- the two ends 26a are formed as external square 62a, which is arranged as an eccentric 22a eccentrically to a central axis 64a of the bearing axis 16a (FIG. 6).
- the bearing arrangement 18a has recesses in the form of a square socket 66a in the housing shells 68a of the hand-held power tool housing 20a.
- the outer square 62a of the bearing shaft 16a can be inserted in four different positions in the inner square 66a of the bearing assembly 18a. Each of these positions corresponds to a different position of the contact surfaces 14a through the eccentric 22a.
- the central axis 64a is shifted by -0.3, -0.1, 0.1 and 0.3 mm.
- the bearing shaft 16a is first inserted in a middle position in the Lageranordung 18a and then determines the game between the contact surfaces 14a, the drive bearing 52a and the hammer tube 48a.
- a mark 74a in the form of a triangle shows the orientation of the bearing axis 16a.
- a point, a dash or a notch or a chamfered surface may be attached as marking 74a to the bearing axis 16a.
- the bearing shaft 16a By the bearing shaft 16a is then inserted forward or backward rotated by 90 ° or 180 °, the game can be increased or decreased.
- the eccentrics 22a are mounted at both ends 26a with the same offset, so that the bearing shaft 16a can be used on both sides. If a stronger tolerance compensation is necessary, the bearing axle 16a can also be exchanged for another bearing axle with another eccentric.
- the changing over of the bearing axis 16a can be done without having to disassemble further components. In particular, an expansion of the intermediate shaft 42a can be avoided.
- a bearing arrangement 18b as adjustment means 32b has a bearing shell 70b, in which a inner square 66b, which receives an outer square 62b of the bearing shaft 16b, is mounted.
- the bearing shell 70b can be rotated in the bearing assembly 18b.
- the inner square 66b is arranged eccentrically with respect to a rotation axis 72b of the bearing shell 70b.
- Two ends 26b of the bearing shaft 16b are formed as external square 62b, which is arranged centrally to a central axis 64b of the bearing axis 16b ( Figure 8).
- a position of a cylindrical central part 24b of the bearing shaft 16b can be changed by turning the bearing shell 70b and a change in position of one of the contact surfaces 14b can be achieved.
- the tolerance compensation unit 12b has a fixing unit 30b, which is provided to fix the movably mounted adjustment means 32b of the tolerance compensation unit 12b in different positions.
- the fixing unit 30b is formed as a latching unit with a detent ball 80b, which is pressed by a spring, not shown, in locking recesses 82b of the bearing shell 70b.
- the locking unit is designed so that the bearing shell 70b snaps into one position in four turns.
- the latching unit can also be designed such that the fixing unit engages, for example, at six, eight or a different number of positions.
- a portable power tool housing 20b has a service opening 34b with a removable cover 76b, which is provided to adjust the tolerance compensation unit 12b from the outside.
- the cover 76b has a slot 78b for unscrewing it by an operator.
- the operator turns the bearing shell 70b to a next latching position of the latching unit until a desired tolerance compensation is achieved.
- the inner square 66b is designed so long that a tool with an external square for adjusting the bearing shell 70b can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010063621A DE102010063621A1 (en) | 2010-12-21 | 2010-12-21 | Hand tool |
PCT/EP2011/072850 WO2012084669A1 (en) | 2010-12-21 | 2011-12-15 | Portable power tool |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2655018A1 true EP2655018A1 (en) | 2013-10-30 |
Family
ID=45463558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11805460.0A Withdrawn EP2655018A1 (en) | 2010-12-21 | 2011-12-15 | Portable power tool |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140000923A1 (en) |
EP (1) | EP2655018A1 (en) |
CN (1) | CN103260829B (en) |
DE (1) | DE102010063621A1 (en) |
RU (1) | RU2013133716A (en) |
WO (1) | WO2012084669A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE537591C2 (en) | 2013-11-07 | 2015-07-07 | Bae Systems Bofors Ab | Ammunition management system and method for sorting mixed ammunition types in a magazine |
DE102015204231B4 (en) * | 2015-03-10 | 2021-03-18 | Robert Bosch Gmbh | Tool and method for treating a workpiece with a tool |
CN106737436B (en) * | 2016-12-21 | 2023-08-25 | 南京汤峰机电有限公司 | Impact function switching mechanism of impact drill |
CN110153919A (en) * | 2019-06-13 | 2019-08-23 | 中科宝航(上海)智能技术研究有限公司 | Electric locking ball device for positioning support |
US11318596B2 (en) * | 2019-10-21 | 2022-05-03 | Makita Corporation | Power tool having hammer mechanism |
WO2022062983A1 (en) * | 2020-09-25 | 2022-03-31 | 南京泉峰科技有限公司 | Electric hammer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3504650A1 (en) * | 1985-02-12 | 1986-08-14 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3626768A (en) * | 1969-09-02 | 1971-12-14 | Joseph J Dancsik | Tool drive assembly |
US3934688A (en) * | 1974-09-11 | 1976-01-27 | The Black And Decker Manufacturing Company | Shifter mechanism |
DE3506695A1 (en) * | 1985-02-26 | 1986-08-28 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
DE4231986A1 (en) * | 1992-09-24 | 1994-03-31 | Bosch Gmbh Robert | Hammer and / or percussion hammer |
CN2295559Y (en) * | 1997-04-04 | 1998-10-28 | 江天二 | Drill tip repairing device for hand drill and impact drill |
JP3976187B2 (en) * | 2002-11-20 | 2007-09-12 | 株式会社マキタ | Hammer drill |
DE102004050800A1 (en) * | 2004-10-19 | 2006-04-20 | Robert Bosch Gmbh | Eccentric gear with a balancing element |
EP1690640B1 (en) * | 2005-02-10 | 2013-03-06 | Black & Decker Inc. | Hand-held hammer machine |
GB0613181D0 (en) * | 2006-07-01 | 2006-08-09 | Black & Decker Inc | Pavement breaker |
AU2007202973A1 (en) * | 2006-07-01 | 2008-01-17 | Black & Decker, Inc. | A cylinder support structure for a hammer drill |
DE102007018928A1 (en) * | 2007-04-21 | 2008-10-23 | Schaeffler Kg | compensation device |
DE102007062260A1 (en) * | 2007-12-21 | 2009-06-25 | Robert Bosch Gmbh | Hand tool |
-
2010
- 2010-12-21 DE DE102010063621A patent/DE102010063621A1/en not_active Withdrawn
-
2011
- 2011-12-15 CN CN201180060990.2A patent/CN103260829B/en not_active Expired - Fee Related
- 2011-12-15 EP EP11805460.0A patent/EP2655018A1/en not_active Withdrawn
- 2011-12-15 RU RU2013133716/02A patent/RU2013133716A/en not_active Application Discontinuation
- 2011-12-15 WO PCT/EP2011/072850 patent/WO2012084669A1/en active Application Filing
- 2011-12-15 US US13/994,851 patent/US20140000923A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3504650A1 (en) * | 1985-02-12 | 1986-08-14 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
Also Published As
Publication number | Publication date |
---|---|
WO2012084669A1 (en) | 2012-06-28 |
DE102010063621A1 (en) | 2012-06-21 |
US20140000923A1 (en) | 2014-01-02 |
RU2013133716A (en) | 2015-01-27 |
CN103260829B (en) | 2016-09-07 |
CN103260829A (en) | 2013-08-21 |
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Legal Events
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Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20200710 |