EP2841237A2 - Machine tool that can be guided manually and having a housing - Google Patents
Machine tool that can be guided manually and having a housingInfo
- Publication number
- EP2841237A2 EP2841237A2 EP13721257.7A EP13721257A EP2841237A2 EP 2841237 A2 EP2841237 A2 EP 2841237A2 EP 13721257 A EP13721257 A EP 13721257A EP 2841237 A2 EP2841237 A2 EP 2841237A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer housing
- machine tool
- handleable
- tool according
- electric drive
- 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
- 238000013016 damping Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 15
- 230000003534 oscillatory effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 9
- 238000003754 machining Methods 0.000 description 9
- 230000035939 shock Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000010073 coating (rubber) 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
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/006—Vibration damping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Definitions
- a portable machine tool can also be a hand-operated oscillation machine tool.
- a hand-held machine tool has an outer housing extending substantially along a longitudinal axis with a gripping area provided for grasping and guiding the machine tool by a user's hand.
- an electric drive unit is accommodated, which rotatably drives a drive shaft of the machine tool.
- the axis of rotation of the drive shaft is aligned substantially parallel to a longitudinal axis of the outer housing or may coincide with this.
- a tool device is arranged, which is arranged in a first end region of the outer housing.
- the tool device is used to transmit the drive torque of the electric drive unit to a preferably arranged on the tool device tool.
- the tool device may have various elements such as gears, clutches and the like.
- both the electric drive unit and the tool unit can be designed in several parts.
- the machine tool preferably has a tool receptacle on the end of the tool device opposite the electric drive unit, the drive shaft of which also pivots at an angle relative to the drive axis of the electric drive element can be arranged.
- the tool holder can be arranged at an outer end of the drive axle, but it can also be arranged in a region spaced from the end of the tool device.
- the outer housing of the hand-held machine tool has a center of mass. This is arranged in relation to the length of the outer housing along the longitudinal axis in a section which extends substantially from the geometric center of the outer housing in a direction away from the first end region, ie preferably to the rear. Preferably, approximately in the region of the geometric center of the outer housing - also seen with respect to the longitudinal axis - a front portion of the handle portion in which the user engages around the hand-held machine tool and leads. Further preferably, a handle device is arranged on the outer housing in the section in which the grip area is located, which assists the user in grasping and guiding the machine tool, in particular a rubber coating and / or a grip recess. In this case, a gripping device can be arranged completely within the gripping region, but in particular, for ergonomic or aesthetic reasons, it can also be arranged only in a part of the gripping region and / or protrude out of it.
- the tool device can be arranged directly at a first end of the electric drive unit.
- the tool device is indirectly, for example, with the interposition of another device, such as a fan device with the electric drive unit is connected, which is preferably also substantially rigidly coupled to the electric drive unit.
- another device such as a fan device with the electric drive unit is connected, which is preferably also substantially rigidly coupled to the electric drive unit.
- rigidly coupled that these devices are mechanically coupled, whereby movements, including high-frequency nature, such as vibrations are transmitted regardless of their direction of action from one to the other element.
- a rigid connection or coupling can therefore also be embodied by means of an integral construction or the like.
- an article having a larger mass is less likely to vibrate or vibrate with the same excitation than an article having a lower mass.
- the impact of impacts on a rigid object of greater mass is less than on a rigid object of lesser mass. Therefore, in a preferred embodiment, the devices of the machine tool, which are preferably not coupled to perform their function mechanically with the drive means such as in particular the electric drive unit or the tool device, with respect to these movable, and thus mechanically decoupled arranged on the outer housing of the machine tool.
- the mass of the outer housing is increased by the mass of these devices and thus reduces the tendency of the outer housing to vibrate.
- these supply devices are arranged in a direction away from the first end region of the outer housing direction behind the electric drive device and are thus preferably in or from the geometric center of the outer housing from behind the handle portion of the outer housing.
- the mass of the outer housing is increased by the mass of these utilities and thus reduces both the tendency of the outer housing to vibrate and the center of gravity of the outer housing is displaced in a direction away from the first end region.
- an additional mass is arranged on the outer housing.
- the outer housing itself may be made heavier, d. H. have a larger mass.
- the outer housing of the hand-held machine tool has a defined inner contour.
- the electric drive unit and the preferably rigidly coupled thereto with this tool device has a preferably defined outer contour, wherein the tool device has at least as far as a defined outer contour, as far as it is arranged in the region of the outer housing. If further devices are arranged between the electric drive unit and the tool device, the outer contour of which extends between the electric drive unit and the tool device, these preferably also form part of the defined outer contour, without being explicitly mentioned below.
- the outer contour of these drive elements and the inner contour of the outer housing are preferably formed such that they are spaced apart from each other by a predetermined minimum distance.
- This minimum distance and the air layer thus lying between the outer contour and the inner contour leads to a mechanical decoupling of the electric drive device and the tool device from the outer housing and thus to an increased handling comfort.
- the minimum distance also results in a reduction in the heat transferred from the drive unit and the tool device to the housing, which also increases the handling comfort for the user.
- the inner contour and thus the outer housing and in particular the gripping region of the hand-held machine tool are kept at a distance from the outer contour and thus at a distance from the electric drive unit and the tool device.
- damping element is on the one hand elastically deformable, but on the other hand, the deformation contrary to a leading inner damping resistance to the damping.
- the supporting forces between the first and second support means of the intermediate force transmission elements are preferably transmitted predominantly by frictional connection. This results in a mechanical decoupling of the drive elements relative to the outer housing.
- a first support device preferably cooperates in conjunction with a damping element with a second support device and thereby an arrangement of first and second support means is formed.
- the outer housing is formed from at least two shell components.
- the dividing plane of at least two shell components of the outer housing preferably extends at least partially in a direction perpendicular to at least one effective axis of at least one, preferably two arrangements of first and second support means, so that forces which counteract the assembly of the outer housing are supported.
- the at least two shell components of the outer housing are preferably in a region in which at least one second support means is arranged in the direction of the drive axis with each other positively and / or non-positively connected, preferably by a screw connection.
- FIG. 2 shows the exemplary portable machine tool from FIG. 1 without the front outer housing half shell
- the center of gravity 27 of the outer housing 12 is located in a housing design, as shown by way of example in FIG. 1, approximately in the region of the marking of the center of mass 27a.
- an on / off switch 22 attached to the outer housing 12 and in the second end area of the machine tool 10, which lies opposite the tool device 15, a power regulator 23 attached to the outer housing 12 is arranged.
- the on / off switch 22 and the power controller 23 are fixedly connected to the outer housing 12 and thus increase the mass of the outer housing 12.
- the masses of the on / off switch 22 and the power controller 23 move the center of mass 27 of the outer housing 12 along the longitudinal axis.
- a second center of gravity 27b of the outer housing 12 is in the region of geometric center 29 of the outer housing 10, which is shown in Fig. 1 by the axis 29.
- the optimum center of gravity 27 of the outer housing 12 shown by way of example lies approximately in the middle in the grip area 21 of the machine tool 10 and is indicated by the illustrated center of gravity 27c.
- first support device 31 is arranged in the region in which it is accommodated in the outer housing 12.
- Another first support device 32 is arranged in the rear region of the electric drive unit 14. At the same position on the hidden, opposite side of the tool device 15 and the electric drive unit 14 also first support means 31 and 32 are arranged.
- two first support devices each 31 arranged, which serve for the transmission of the supporting forces of the tool device 15 to the outer housing 12.
- two first support means 32 are arranged on the side of the electric drive device 14, which is opposite to the tool device 15.
- two first supporting devices 32 are also arranged behind the grip region 21, which serve for transmitting the supporting forces from the electric drive device 14 to the outer housing 12.
- Second support means are respectively arranged on the two housing halves and cooperate with the first support means 31 and 32 to hold the outer contour and the inner contour at a distance a which corresponds at least to the minimum distance a from one another.
- a damping element 39 is arranged, whereby the transmission in particular of supporting forces and vibrations is mechanically decoupled in particular by internal friction forces of the damping element substantially.
- the supporting forces are supported by the first and second supporting devices relative to the outer housing 12, this being largely decoupled in connection with the minimum distance a from the electric drive unit 14 and the tool device 15, in particular with regard to vibrations and shocks of these devices.
- control device 24 is shown in Fig. 2, which is arranged in the rear region of the outer housing 12 of the machine tool 10.
- the control device 24 is mechanically decoupled from the electric drive device 14 and the tool device 15 and arranged on the outer housing 12 of the machine tool 10.
- the mass of the control device 24 thus increases the mass of the outer housing 12 and thus reduces the tendency of the outer housing 12 to vibrate
- Supply device 25 which is shown in the exemplary embodiment by the supply of a supply line, is mechanically decoupled from the drive elements 14, 15 of the machine tool 10 and fixedly connected to the outer housing 12 of the machine tool 10.
- FIG. 3 shows a vertical section through the machine tool 10 arranged perpendicular to the axis of rotation of the electric drive device 14 in the region of the support device 31 on the tool device 15.
- the outer housing 12 is thereby only engaged in the vertical middle region by the sectional plane.
- second support means 36 On the outer housing 12 are formed symmetrically to the longitudinal axis 11 second support means 36, which cooperate with first support means 31. Between the first 31 and second 36 support means, a damping element 39 is arranged in each case. Also in this figure, the distance a between the outer contour 19 on the tool device 15 and the inner contour 20 of the outer housing 12 is clearly visible.
- the main direction of action of the two arrangements of first and second support means 31 and 36 intersects the longitudinal axis 1 1 of the machine tool 10.
- FIG. 4 is an enlarged view of Details IV shows, described in more detail.
- the first support device 31 is designed in the form of a rotationally symmetrical recess, which has the shape of a hollow dome in its end region.
- the second support means 36 is formed in the form of a rotationally symmetrical pin, which is formed according to dome-shaped in its end region.
- the diameters D1 and D2 of recess and pin and the radii R1 and R2 of the dome and dome-shaped areas of recess and engaging pins in conjunction with the dimensions and material properties of the interposed damping element 39 are coordinated so that the damping element 39 in mounted state in any direction in which a support of forces F should take place, having a desired bias.
- the range of the effective directions of the forces F, which arranged the arrangement shown in Fig. 4 of the first and second support means 31 and 36 with therebetween Power transmission element 39 can be supported, is indicated in this illustration by the arrows "F".
- This exemplary embodiment uses to keep a predetermined minimum distance a between the outer contour 19 of the electric drive unit 14 and tool device 15 and the inner contour 20 of the outer housing 12, first and second support means 31, 32, 36 between which a damping element 39 is arranged. Due to the construction shown of the hand-held machine tool 10, the supporting forces are supported via the first and second support means 31, 32, 36 relative to the outer housing 12, wherein the outer housing 12 is substantially mechanically decoupled from the electric drive unit 14 and the tool device 15.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Percussive Tools And Related Accessories (AREA)
- Portable Power Tools In General (AREA)
- Harvester Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012103604A DE102012103604A1 (en) | 2012-04-24 | 2012-04-24 | Handleable machine tool with housing |
PCT/EP2013/001206 WO2013159903A2 (en) | 2012-04-24 | 2013-04-22 | Machine tool that can be guided manually and having a housing |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2841237A2 true EP2841237A2 (en) | 2015-03-04 |
EP2841237B1 EP2841237B1 (en) | 2021-01-06 |
EP2841237B2 EP2841237B2 (en) | 2024-07-10 |
Family
ID=48326233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13721257.7A Active EP2841237B2 (en) | 2012-04-24 | 2013-04-22 | Machine tool that can be guided manually and having a housing |
Country Status (6)
Country | Link |
---|---|
US (1) | US10160111B2 (en) |
EP (1) | EP2841237B2 (en) |
CN (1) | CN104245238B (en) |
DE (1) | DE102012103604A1 (en) |
DK (1) | DK2841237T3 (en) |
WO (1) | WO2013159903A2 (en) |
Families Citing this family (9)
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CN104139381B (en) | 2013-05-06 | 2017-01-11 | 米沃奇电动工具公司 | Power tool including a battery pack isolation system |
CN105835012B (en) | 2015-02-02 | 2020-08-21 | 株式会社牧田 | Working tool |
CN205497395U (en) | 2015-02-15 | 2016-08-24 | 苏州宝时得电动工具有限公司 | Power tool |
JP6795309B2 (en) * | 2016-02-19 | 2020-12-02 | 株式会社マキタ | Work tools |
JP6703417B2 (en) * | 2016-02-19 | 2020-06-03 | 株式会社マキタ | Work tools |
EP3357645B1 (en) * | 2016-02-19 | 2019-11-27 | Makita Corporation | Work tool |
US10220501B1 (en) * | 2016-06-15 | 2019-03-05 | George P. Davidson | Pocket door repair tool |
DE102019200317A1 (en) * | 2019-01-14 | 2020-07-16 | Robert Bosch Gmbh | Hand tool |
EP4119299A1 (en) * | 2021-07-12 | 2023-01-18 | Hilti Aktiengesellschaft | Handheld machine tool and use of a handheld machine tool |
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-
2012
- 2012-04-24 DE DE102012103604A patent/DE102012103604A1/en not_active Ceased
-
2013
- 2013-04-22 DK DK13721257.7T patent/DK2841237T3/en active
- 2013-04-22 US US14/394,180 patent/US10160111B2/en active Active
- 2013-04-22 CN CN201380021580.6A patent/CN104245238B/en active Active
- 2013-04-22 EP EP13721257.7A patent/EP2841237B2/en active Active
- 2013-04-22 WO PCT/EP2013/001206 patent/WO2013159903A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013159903A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP2841237B1 (en) | 2021-01-06 |
US10160111B2 (en) | 2018-12-25 |
WO2013159903A2 (en) | 2013-10-31 |
CN104245238A (en) | 2014-12-24 |
US20150144367A1 (en) | 2015-05-28 |
WO2013159903A3 (en) | 2014-06-05 |
DE102012103604A1 (en) | 2013-10-24 |
CN104245238B (en) | 2017-03-22 |
EP2841237B2 (en) | 2024-07-10 |
DK2841237T3 (en) | 2021-04-06 |
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