US20070193760A1 - Electric power tool - Google Patents
Electric power tool Download PDFInfo
- Publication number
- US20070193760A1 US20070193760A1 US11/497,895 US49789506A US2007193760A1 US 20070193760 A1 US20070193760 A1 US 20070193760A1 US 49789506 A US49789506 A US 49789506A US 2007193760 A1 US2007193760 A1 US 2007193760A1
- Authority
- US
- United States
- Prior art keywords
- electric power
- power tool
- shell
- extension
- housing
- 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.)
- Abandoned
Links
- 239000004519 grease Substances 0.000 claims description 16
- 238000005461 lubrication Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
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
- B25F5/001—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
- the present invention generally relates to electric power tools.
- Shell-type tools include a shell element of the housing, which in shell-type fashion surrounds corresponding functional units.
- the functional units of the electric power tool are located in a cup element of the housing.
- Electric power tools with a plurality of separable housing parts are also known, in which at least one shell element of the housing and one cup element of the housing that are separate from one another are embodied.
- one housing part of the cup element at least partly embraces one housing part of the shell element from the outside.
- two shell elements oriented toward one another surround the interior of the electric power tool in the corresponding housing part.
- the shell elements have a parting seam in the axial direction.
- a cup element conversely, has a separation perpendicular to the axial direction.
- the cup element is embodied with a larger circumference than the shell element, and as a result lubrication of the gear can be improved.
- the circumferential region in which the cup element embraces the shell element is embodied with double walls.
- a grease chamber located in the shell part is thus limited only to less space than in electric power tools in which the grease chamber is located as far as the one-walled housing part.
- the lubricant or grease thus favorably remains in the vicinity of the components to be supplied, for instance a gear, and as a result the lubrication can be improved, and in particular the gear can be prevented from running dry quickly. This advantageously also lengthens the service life of the components, such as gear wheels, without putting limits on the design.
- the region of the shell element embraced by the cup element as an extension of the shell element, plunges into the cup element, and the shell element and the cup element are axially in line with one another.
- the extension is favorably no longer visible from outside.
- the extension of the shell element advantageously now has to meet only the technical requirements, without having to take intended design features into account.
- an optimal amount of installation space is achieved.
- the electric power tool can meet ergonomic demands and still have a designer shape.
- a gear is preferably located in the shell element, and the extension defines a grease area, located in the gear, of the shell element.
- the extension can closely surround gear wheels of the gear.
- a closure for the grease area located in the extension can be located in the cup element, and the grease area is operatively connected to the extension. The operative connection is due to the fact that the grease stays in the immediate vicinity of the gear wheels, which has the favorable effects on the lubrication mentioned at the beginning of this section.
- the shell element and the cup element can be capable of being coupled together without tools, for instance by a connection on the order of a bayonet mount, a plug-type connection, or a lock, in which the housing parts of both the shell element and the cup element are secured against rotating relative to one another.
- FIGS. 1 a, b, c show a view of a shell part of one embodiment of an electric power tool in accordance with the present invention in a side view ( FIG. 1 a ), a front view ( FIG. 1 c ), and a perspective view laterally from above ( FIG. 1 b ); and
- FIGS. 2 a, b show a view of a cup part of the electric power tool in accordance with the present invention in the embodiment of FIG. 1 , in a side view ( FIG. 2 a ) and a front view ( FIG. 2 b ).
- FIGS. 1 a, b, c a shell element 10 of an electric power tool according to the invention is shown in various perspectives; located in the housing part 20 a of the electric power tool are a drive unit 16 , not visible in FIG. 1 , such as an electric motor, and a gear 13 .
- FIGS. 2 a, b each show a cup element 11 in various perspectives, whose housing part 20 b includes mounts and bearings for a drive shaft, not shown.
- the shell element 10 and the cup element 11 are axially in line with one another in the assembled state and can be coupled to one another by force- and/or form-locking; the assembly is preferably done without tools, for instance via a bayonet-mount-like closure, or requires only a simple assembly tool.
- the housing parts 20 a , 20 b In the assembled state, which is not shown in the drawings, the housing parts 20 a , 20 b have a substantially cylindrical cross section.
- a housing part 20 a of the cup element 11 at least partly embraces a housing part 20 b of the shell element 10 from the outside.
- the region of the shell element 10 embraced by the cup element 11 plunges, as an extension 12 of the shell element 10 , into the cup element 11 .
- the extension 12 is outlined with a dashed line in FIG. 1 a and is a part of the shell element 10 .
- the extension 12 in particular is embodied with a smaller circumference than the housing part 20 b of the cup element 11 that embraces the extension 12 .
- a protrusion 17 on the upper circumference of the housing part 20 a of the shell element 10 is located such that when the cup element 11 is slipped on, it fits over the cup element 11 in the region 18 . As a result, a secure connection is made between the shell element 10 and the cup element 11 .
- extension 12 in the assembled state, is not visible from outside, it need not meet any designer requirements, either. Instead, the embodiment of the extension 12 can be adapted to the technical requirements.
- the extension 12 in particular defines a grease area 14 of the shell element 10 , which region is located in the gear 13 .
- the extension 12 surrounds gear wheels 15 of the gear 13 as closely as possible.
- the cup element 11 thus forms a closure for the grease area 14 located in the extension 12 .
- the grease area 14 is thus smaller than in the known electric power tools. Because of this dimensioning of the grease area 14 , the grease remains in the vicinity of the gear wheels 15 , thus preventing the gear 13 from running dry quickly.
Abstract
An electric power tool has a plurality of separable housing parts including at least two shell elements oriented toward one another of a housing and one cup element of a housing, and the housing parts include one housing part of the cup element which at least partly embraces one housing part of the shell element from outside.
Description
- The invention described and claimed hereinbelow is also described in German Patent Application DE 102005037255.4 filed on Aug. 8, 2005. This German Patent Application, whose subject matter is incorporated here by reference, provides the basis for a claim of priority of invention under 35 U.S.C. 119(a)-(d).
- The present invention generally relates to electric power tools.
- In the prior art, electric power tools that are embodied either as shell-type tools or as cup-type tools are known. Shell-type tools include a shell element of the housing, which in shell-type fashion surrounds corresponding functional units. In a cup-type tool, the functional units of the electric power tool are located in a cup element of the housing. Electric power tools with a plurality of separable housing parts are also known, in which at least one shell element of the housing and one cup element of the housing that are separate from one another are embodied.
- It is therefore an object of the present invention to provide an electric power tool which is a further improvement of the existing electric power tools.
- In keeping with these objects and with others which will become apparent hereinafter, in the electric power tool of the invention, one housing part of the cup element at least partly embraces one housing part of the shell element from the outside. For instance, two shell elements oriented toward one another surround the interior of the electric power tool in the corresponding housing part. The shell elements have a parting seam in the axial direction.
- A cup element, conversely, has a separation perpendicular to the axial direction. Preferably, according to the invention, the cup element is embodied with a larger circumference than the shell element, and as a result lubrication of the gear can be improved. This is due to the fact that the circumferential region in which the cup element embraces the shell element is embodied with double walls. A grease chamber located in the shell part is thus limited only to less space than in electric power tools in which the grease chamber is located as far as the one-walled housing part.
- The lubricant or grease thus favorably remains in the vicinity of the components to be supplied, for instance a gear, and as a result the lubrication can be improved, and in particular the gear can be prevented from running dry quickly. This advantageously also lengthens the service life of the components, such as gear wheels, without putting limits on the design.
- Preferably, the region of the shell element embraced by the cup element, as an extension of the shell element, plunges into the cup element, and the shell element and the cup element are axially in line with one another. The extension is favorably no longer visible from outside. Thus the extension of the shell element advantageously now has to meet only the technical requirements, without having to take intended design features into account. In the interior, conversely, an optimal amount of installation space is achieved. In the visible part, conversely, or in other words in the cup element that can be seen from outside, the electric power tool can meet ergonomic demands and still have a designer shape.
- A gear is preferably located in the shell element, and the extension defines a grease area, located in the gear, of the shell element. In particular, the extension can closely surround gear wheels of the gear. In an especially preferred embodiment, a closure for the grease area located in the extension can be located in the cup element, and the grease area is operatively connected to the extension. The operative connection is due to the fact that the grease stays in the immediate vicinity of the gear wheels, which has the favorable effects on the lubrication mentioned at the beginning of this section.
- In an advantageous refinement, the shell element and the cup element can be capable of being coupled together without tools, for instance by a connection on the order of a bayonet mount, a plug-type connection, or a lock, in which the housing parts of both the shell element and the cup element are secured against rotating relative to one another.
- The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
-
FIGS. 1 a, b, c show a view of a shell part of one embodiment of an electric power tool in accordance with the present invention in a side view (FIG. 1 a), a front view (FIG. 1 c), and a perspective view laterally from above (FIG. 1 b); and -
FIGS. 2 a, b show a view of a cup part of the electric power tool in accordance with the present invention in the embodiment ofFIG. 1 , in a side view (FIG. 2 a) and a front view (FIG. 2 b). - In
FIGS. 1 a, b, c, ashell element 10 of an electric power tool according to the invention is shown in various perspectives; located in thehousing part 20 a of the electric power tool are adrive unit 16, not visible inFIG. 1 , such as an electric motor, and agear 13.FIGS. 2 a, b each show acup element 11 in various perspectives, whosehousing part 20 b includes mounts and bearings for a drive shaft, not shown. - The
shell element 10 and thecup element 11 are axially in line with one another in the assembled state and can be coupled to one another by force- and/or form-locking; the assembly is preferably done without tools, for instance via a bayonet-mount-like closure, or requires only a simple assembly tool. In the assembled state, which is not shown in the drawings, thehousing parts - According to the invention, a
housing part 20 a of thecup element 11 at least partly embraces ahousing part 20 b of theshell element 10 from the outside. The region of theshell element 10 embraced by thecup element 11 plunges, as anextension 12 of theshell element 10, into thecup element 11. Theextension 12 is outlined with a dashed line inFIG. 1 a and is a part of theshell element 10. - The
extension 12 in particular is embodied with a smaller circumference than thehousing part 20 b of thecup element 11 that embraces theextension 12. - A
protrusion 17 on the upper circumference of thehousing part 20 a of theshell element 10 is located such that when thecup element 11 is slipped on, it fits over thecup element 11 in theregion 18. As a result, a secure connection is made between theshell element 10 and thecup element 11. - Because the
extension 12, in the assembled state, is not visible from outside, it need not meet any designer requirements, either. Instead, the embodiment of theextension 12 can be adapted to the technical requirements. Theextension 12 in particular defines agrease area 14 of theshell element 10, which region is located in thegear 13. Theextension 12surrounds gear wheels 15 of thegear 13 as closely as possible. - The
cup element 11 thus forms a closure for thegrease area 14 located in theextension 12. Thegrease area 14 is thus smaller than in the known electric power tools. Because of this dimensioning of thegrease area 14, the grease remains in the vicinity of thegear wheels 15, thus preventing thegear 13 from running dry quickly. - It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
- While the invention has been illustrated and described as embodied in an electric power tool, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
- Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
Claims (8)
1. An electric power tool, comprising a plurality of separable housing parts including at least two shell elements oriented toward one another of a housing and one cup element of the housing, said housing parts including one housing part of said cup element which at least partly embraces one housing part of said shell element from outside.
2. An electric power tool as defined in claim 1 , wherein a region of said shell element which is embraced by said cup element plunges, as an extension of said shell element, into said cup element.
3. An electric power tool as defined in claim 2; and further comprising a gear that is located in said shell element.
4. An electric power tool as defined in claim 3 , wherein said extension defines a grease area of said shell element, said grease area being located in said gear.
5. An electric power tool as defined in claim 3 , wherein said gear has gear wheels, said extension closely surrounding said gear wheels.
6. An electric power tool as defined in claim 4 , wherein said cup element is configured so that it forms a closure for said grease area located in said extension.
7. An electric power tool as defined in claim 4 , wherein said grease area is located such that it is operatably connected to said extension.
8. An electric power tool as defined in claim 1 , wherein said shell element and said cup element are configured so that they are coupleable to one another without tools.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005037255A DE102005037255A1 (en) | 2005-08-08 | 2005-08-08 | Power tool |
DE102005037255.4 | 2005-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070193760A1 true US20070193760A1 (en) | 2007-08-23 |
Family
ID=37027344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/497,895 Abandoned US20070193760A1 (en) | 2005-08-08 | 2006-08-02 | Electric power tool |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070193760A1 (en) |
CN (1) | CN1911604B (en) |
DE (1) | DE102005037255A1 (en) |
GB (1) | GB2428992B (en) |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2346778A (en) * | 1942-10-16 | 1944-04-18 | Independent Pneumatic Tool Co | Portable hand held electric tool |
US2456571A (en) * | 1947-09-13 | 1948-12-14 | Singer Mfg Co | Portable electric tool |
US3908139A (en) * | 1974-06-10 | 1975-09-23 | Singer Co | Portable power tools |
US4730134A (en) * | 1987-05-28 | 1988-03-08 | The Singer Company | Portable power tool with combination bearing plate, nut plate and auxiliary handle mount |
US5640741A (en) * | 1994-10-13 | 1997-06-24 | Ryobi Limited | Structure for handle of power tool |
US6139359A (en) * | 1999-04-08 | 2000-10-31 | Snap-On Tools Company | Cordless screwdriver and multi-position battery pack therefor |
US6446734B1 (en) * | 1999-11-11 | 2002-09-10 | Black & Decker Inc. | Motor/handle housing and gear case mounting for portable power tool |
US20030117708A1 (en) * | 2001-12-21 | 2003-06-26 | Koninklijke Philips Electronics N.V. | Sealed enclosure for a wire-grid polarizer and subassembly for a display system |
US6725945B2 (en) * | 2001-11-15 | 2004-04-27 | Makita Corporation | Impact tool with improved operability |
US6729812B2 (en) * | 1999-12-06 | 2004-05-04 | Theodore G. Yaksich | Power driver having geared tool holder |
US6733414B2 (en) * | 2001-01-12 | 2004-05-11 | Milwaukee Electric Tool Corporation | Gear assembly for a power tool |
US7077218B2 (en) * | 2004-05-20 | 2006-07-18 | Black & Decker Inc. | Motor housing and assembly process for power tool |
US7090032B2 (en) * | 2004-02-23 | 2006-08-15 | Ryobi Ltd. | Electric power tool |
US7116232B2 (en) * | 2002-12-23 | 2006-10-03 | Hilti Aktiengesellscahft | Transponder holder |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4106768A1 (en) * | 1991-03-04 | 1992-09-10 | Licentia Gmbh | HAND-HELD ELECTRIC MACHINE TOOL WITH A SHELL PART MADE OF ELASTIC YELLOW MATERIAL ON THE HANDLE |
US6443239B1 (en) * | 2000-02-29 | 2002-09-03 | S.P. Air Kabusiki Kaisha | Pneumatic rotary tool |
DE10021356A1 (en) * | 2000-05-02 | 2001-11-08 | Hilti Ag | Rotating electric hand tool device with safety routine has revolution rate dependent coupling in force transfer path from electric motor to gearbox for transferring torque |
CN2420088Y (en) * | 2000-05-15 | 2001-02-21 | 铨宝工业股份有限公司 | Electric drill base casing structure with cladding clamp |
GB0105140D0 (en) * | 2001-03-02 | 2001-04-18 | Black & Decker Inc | Power tool body |
JP3963323B2 (en) * | 2003-02-07 | 2007-08-22 | 株式会社マキタ | Electric tool |
DE10341386A1 (en) * | 2003-09-05 | 2005-04-07 | Hilti Ag | Hand-held tool, e.g. nail/rivet setter has housing of two shells connected in working direction by sleeve-shaped housing part to reduce size |
US7191532B2 (en) * | 2004-08-17 | 2007-03-20 | Eastway Fair Company Limited | Modular tool assembly having a vacuum mounting arrangement |
DE102005008037A1 (en) * | 2005-02-22 | 2006-08-24 | Robert Bosch Gmbh | Housing, fastening device for a housing and hand tool with a housing |
-
2005
- 2005-08-08 DE DE102005037255A patent/DE102005037255A1/en active Pending
-
2006
- 2006-08-02 US US11/497,895 patent/US20070193760A1/en not_active Abandoned
- 2006-08-04 GB GB0615637A patent/GB2428992B/en active Active
- 2006-08-08 CN CN200610110704XA patent/CN1911604B/en active Active
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2346778A (en) * | 1942-10-16 | 1944-04-18 | Independent Pneumatic Tool Co | Portable hand held electric tool |
US2456571A (en) * | 1947-09-13 | 1948-12-14 | Singer Mfg Co | Portable electric tool |
US3908139A (en) * | 1974-06-10 | 1975-09-23 | Singer Co | Portable power tools |
US4730134A (en) * | 1987-05-28 | 1988-03-08 | The Singer Company | Portable power tool with combination bearing plate, nut plate and auxiliary handle mount |
US5640741A (en) * | 1994-10-13 | 1997-06-24 | Ryobi Limited | Structure for handle of power tool |
US6139359A (en) * | 1999-04-08 | 2000-10-31 | Snap-On Tools Company | Cordless screwdriver and multi-position battery pack therefor |
US6446734B1 (en) * | 1999-11-11 | 2002-09-10 | Black & Decker Inc. | Motor/handle housing and gear case mounting for portable power tool |
US6729812B2 (en) * | 1999-12-06 | 2004-05-04 | Theodore G. Yaksich | Power driver having geared tool holder |
US6733414B2 (en) * | 2001-01-12 | 2004-05-11 | Milwaukee Electric Tool Corporation | Gear assembly for a power tool |
US6725945B2 (en) * | 2001-11-15 | 2004-04-27 | Makita Corporation | Impact tool with improved operability |
US20030117708A1 (en) * | 2001-12-21 | 2003-06-26 | Koninklijke Philips Electronics N.V. | Sealed enclosure for a wire-grid polarizer and subassembly for a display system |
US7116232B2 (en) * | 2002-12-23 | 2006-10-03 | Hilti Aktiengesellscahft | Transponder holder |
US7090032B2 (en) * | 2004-02-23 | 2006-08-15 | Ryobi Ltd. | Electric power tool |
US7077218B2 (en) * | 2004-05-20 | 2006-07-18 | Black & Decker Inc. | Motor housing and assembly process for power tool |
Also Published As
Publication number | Publication date |
---|---|
GB0615637D0 (en) | 2006-09-13 |
GB2428992B (en) | 2007-11-21 |
CN1911604A (en) | 2007-02-14 |
GB2428992A (en) | 2007-02-14 |
CN1911604B (en) | 2012-05-09 |
DE102005037255A1 (en) | 2007-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SIMM, ROBERT;VAN DER SCHANS, CORNELIS;WEBER, MARKUS;REEL/FRAME:019256/0990;SIGNING DATES FROM 20060804 TO 20060820 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |