WO1999044778A1 - Drive mechanism with rotational speed reduction for a cutting device with two counter rotating cutting blades - Google Patents
Drive mechanism with rotational speed reduction for a cutting device with two counter rotating cutting blades Download PDFInfo
- Publication number
- WO1999044778A1 WO1999044778A1 PCT/EP1999/001370 EP9901370W WO9944778A1 WO 1999044778 A1 WO1999044778 A1 WO 1999044778A1 EP 9901370 W EP9901370 W EP 9901370W WO 9944778 A1 WO9944778 A1 WO 9944778A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- drive device
- output
- drive
- shafts
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
- B23D47/126—Angle drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/16—Hand-held sawing devices with circular saw blades
- B23D45/165—Hand-held sawing devices with circular saw blades with a plurality of saw blades or saw blades having plural cutting zones
Definitions
- the present invention relates to a drive device for a double separating device with two circular disk-shaped, parallel adjacent, coaxially counter-rotating separating elements, in particular circular saw blades, with a motor-driven drive shaft and two counter-rotating output shafts that can be connected to the separating elements.
- the known device As a separating element for making a separating cut, ie for cutting a workpiece, the known device has a double circular saw blade made of two parallel, partially rotating partial saw blades. This known device has proven itself essentially well, because due to the counter-rotating partial saw blades only very low reaction forces arise during use, so that the device can be easily guided by hand. Therefore, the device is also well suited for sawing metals such as aluminum. However, it has been shown that the 2 -
- the speed of the output shafts is so high that only circular saw blades with a relatively small diameter can be used, because otherwise the peripheral cutting speed would become too high and the relatively low torque would not be sufficient.
- a higher speed reduction between the speed of the drive shaft determined by the drive motor and the output shafts would thus actually be indicated, but cannot be easily achieved with a gear or bevel gear.
- the present invention is therefore based on the object of providing a drive device of the type mentioned, with which more favorable output speeds and moments can be achieved with a small and compact design.
- the drive shaft acts indirectly on the output shafts for speed reduction via an intermediate shaft arrangement.
- two reduction stages are provided, so that the speed which is particularly favorable for circular saw blades can be achieved.
- the drive device can be designed so that optimal circumferential cutting speeds can also be achieved with blades of larger diameter, especially since a higher torque is also available because of the reduced speed.
- intermediate shafts as a hollow shaft and inner shaft guided therein are arranged parallel to the output shafts between the latter and a drive pinion of the drive shaft.
- the intermediate shafts are expediently located in an elongated housing transverse to its longitudinal extent. Further details on this as well as on the further advantageous design features of the subclaims are contained in the following description.
- the single drawing figure shows an axial section of part of a double separator with a drive device according to the invention.
- a separating device 1 has a housing 2 and a drive device 4 accommodated therein for two circular disk-shaped, parallel adjacent, coaxially counter-rotating separating elements 6 and 8.
- the separating elements 6, 8 are, in particular, circular saw blades which are arranged reversely with respect to their cutting direction.
- the drive device 4 has a motor-driven drive shaft 10 and two counter-rotating output shafts 12 and 14 which can be connected to the separating elements 6, 8.
- this intermediate shaft arrangement 16 has a first intermediate shaft designed as a hollow shaft 18 and one as coaxial within the - 4th
- Hollow shaft 18 guided inner shaft 20 formed second intermediate shaft.
- These two intermediate shafts 18, 20 are each connected to one of two parallel, axially spaced-apart bevel gears 22 and 24, the drive shaft 10 being in engagement with both bevel gears 22, 24 on two diametrically opposite sides via a bevel pinion 26, so that via the Bevel gears 22, 24, the two intermediate shafts 18, 20 are driven in opposite directions.
- an angular deflection of 90 ° is achieved, i.e. the intermediate shafts 18, 20 run perpendicular to the drive shaft 10.
- the invention is not limited to this; rather, an embodiment without an angular deflection, that is to say deviating from the design of an angle grinder, would also be conceivable.
- one output shaft 12 is designed as a hollow shaft and the other output shaft 14 as an inner shaft that is coaxially guided therein.
- the intermediate shafts 18, 20 are arranged offset in parallel relative to the output shafts 12, 14, specifically in the area between the output shafts 12, 14 and the drive shaft 10 or the bevel pinion 26.
- the intermediate inner shaft 20 is also connected via a first gear pair 28 of the output hollow shaft 12, while the intermediate hollow shaft 18 is connected to the output inner shaft 14 via a second gear pair 30.
- the gear pairs 28, 30 are preferably formed by spur gears, wherein a pinion of each pair 28, 30 can be formed in one piece with the associated bevel gear 22, 24. With regard to the desired compact design, it is particularly advantageous if the one Gear pair 30 is positioned with respect to its plane of rotation in the area lying axially between the bevel gears 22, 24.
- the two gears of the pair 30 are in engagement with one another on the side of the intermediate shaft arrangement 16 diametrically opposite the drive pinion 26.
- part of the space between the bevel gears 22, 24 is optimally used.
- the one bevel gear wheel 22 is preferably positioned with respect to its plane of rotation in the area lying axially between the two gear wheel pairs 28, 30. Overall, the configuration described results in a very space-saving, compact design.
- the intermediate inner shaft 20 is mounted at both ends directly in the housing 2 via a respective pivot bearing 32, 34, in particular roller bearings.
- the intermediate hollow shaft 18 is mounted indirectly in the housing 2, specifically via the Inner shaft 20, for which purpose corresponding rotary bearings 36, for example roller or slide bearings, are arranged between the inner shaft 20 and the hollow shaft 18.
- the drive inner shaft 14 has one end, specifically on its side opposite the separating elements 6, 8, and is mounted directly in the housing 2 via a rotary bearing 38. At the other end, however, the inner shaft 14 is supported indirectly via a bearing arrangement 40 which sits between the housing 2 and the hollow shaft 12.
- the inner shaft 14 is supported in the hollow shaft 12 via a further rotary bearing 42.
- This bearing 40, 42 is designed such that the two output shafts 12, 14 are also supported against one another against lateral buckling forces. Specifically, this is achieved by an axial offset of the individual bearings 40, 42.
- the hollow output shaft 12 is releasably connected to a second holding flange 48 for the other separating element 8 with a first holding flange 44 for the one separating element 6 and the driven inner shaft 14 at its end 46 axially projecting the first holding flange 44 .
- the separating elements 6, 8 are releasably connected, in particular screwed, to the associated holding flange 44, 48. Connections in the manner of a bayonet connection are also conceivable.
- the separating elements 6, 8 are fastened on the mutually facing sides of the holding flange 44, 48, so that they are adjacent in parallel with only a small gap distance.
- the invention is not limited to the exemplary embodiments shown and described, but also encompasses all embodiments having the same effect in the sense of the invention. Furthermore, the invention has not yet been limited to the combination of features defined in claim 1, but it can also be defined by any other combination of certain features of all of the individual features disclosed. This means that in principle practically every single feature of claim 1 can be omitted or replaced by at least one single feature disclosed elsewhere in the application. In this respect, claim 1 is only to be understood as a first attempt at formulation for an invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Making Paper Articles (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Control Of Multiple Motors (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0902099A ATA902099A (en) | 1998-03-06 | 1999-03-03 | DRIVE DEVICE WITH SPEED REPLACEMENT FOR A SEPARATOR WITH TWO COMPENSATING ROTATING BLADES |
AU29319/99A AU2931999A (en) | 1998-03-06 | 1999-03-03 | Drive mechanism with rotational speed reduction for a cutting device with two counter rotating cutting blades |
DE19980335T DE19980335D2 (en) | 1998-03-06 | 1999-03-03 | Drive device with speed reduction for a cutting device with two counter-rotating blades |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29804002U DE29804002U1 (en) | 1998-03-06 | 1998-03-06 | Drive device for a double separator |
DE29804002.6 | 1998-03-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999044778A1 true WO1999044778A1 (en) | 1999-09-10 |
Family
ID=8053715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/001370 WO1999044778A1 (en) | 1998-03-06 | 1999-03-03 | Drive mechanism with rotational speed reduction for a cutting device with two counter rotating cutting blades |
Country Status (5)
Country | Link |
---|---|
AT (1) | ATA902099A (en) |
AU (1) | AU2931999A (en) |
CH (1) | CH694012A5 (en) |
DE (2) | DE29804002U1 (en) |
WO (1) | WO1999044778A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002045894A1 (en) * | 2000-12-09 | 2002-06-13 | Robert Bosch Gmbh | Hand-operated machine tool with two immediately axially adjacent cutting disks which rotate in opposite directions |
WO2002092296A2 (en) * | 2001-05-16 | 2002-11-21 | Nord Center I Kalmar Ab | Hub device |
WO2012071775A1 (en) * | 2010-11-30 | 2012-06-07 | 宁波黑松工具有限公司 | Dual-saw blade cutting machine |
CN103862102A (en) * | 2012-12-11 | 2014-06-18 | 苏州宝时得电动工具有限公司 | Double-saw blade electric circular saw |
CN113661830A (en) * | 2021-09-14 | 2021-11-19 | 中国农业大学 | Tip cutting device of sugarcane harvester |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009005972U1 (en) * | 2009-04-27 | 2009-07-30 | Elektrowerkzeuge Gmbh Eibenstock | Gearbox for devices with double rotary tool |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE235483C (en) * | ||||
DE644011C (en) * | 1935-03-30 | 1937-04-22 | Carl Sauer | Slot milling machine |
US2555428A (en) * | 1948-06-07 | 1951-06-05 | George A Tuttle | Power-driven pruning saw |
FR2192483A5 (en) * | 1972-07-07 | 1974-02-08 | Giraud Leone |
-
1998
- 1998-03-06 DE DE29804002U patent/DE29804002U1/en not_active Expired - Lifetime
-
1999
- 1999-03-03 WO PCT/EP1999/001370 patent/WO1999044778A1/en active Application Filing
- 1999-03-03 DE DE19980335T patent/DE19980335D2/en not_active Expired - Fee Related
- 1999-03-03 AU AU29319/99A patent/AU2931999A/en not_active Abandoned
- 1999-03-03 CH CH17222000A patent/CH694012A5/en not_active IP Right Cessation
- 1999-03-03 AT AT0902099A patent/ATA902099A/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE235483C (en) * | ||||
DE644011C (en) * | 1935-03-30 | 1937-04-22 | Carl Sauer | Slot milling machine |
US2555428A (en) * | 1948-06-07 | 1951-06-05 | George A Tuttle | Power-driven pruning saw |
FR2192483A5 (en) * | 1972-07-07 | 1974-02-08 | Giraud Leone |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002045894A1 (en) * | 2000-12-09 | 2002-06-13 | Robert Bosch Gmbh | Hand-operated machine tool with two immediately axially adjacent cutting disks which rotate in opposite directions |
WO2002092296A2 (en) * | 2001-05-16 | 2002-11-21 | Nord Center I Kalmar Ab | Hub device |
WO2002092296A3 (en) * | 2001-05-16 | 2007-11-22 | Nord Ct I Kalmar Ab | Hub device |
WO2012071775A1 (en) * | 2010-11-30 | 2012-06-07 | 宁波黑松工具有限公司 | Dual-saw blade cutting machine |
ES2408385A2 (en) * | 2010-11-30 | 2013-06-20 | Ningbo Blackpine Tools Co. Ltd | Dual-saw blade cutting machine |
ES2408385R1 (en) * | 2010-11-30 | 2013-11-06 | Ningbo Blackpine Tools Co Ltd | Cutter with double circular saw blades |
CN103862102A (en) * | 2012-12-11 | 2014-06-18 | 苏州宝时得电动工具有限公司 | Double-saw blade electric circular saw |
CN113661830A (en) * | 2021-09-14 | 2021-11-19 | 中国农业大学 | Tip cutting device of sugarcane harvester |
Also Published As
Publication number | Publication date |
---|---|
CH694012A5 (en) | 2004-06-15 |
DE29804002U1 (en) | 1999-07-08 |
AU2931999A (en) | 1999-09-20 |
ATA902099A (en) | 2005-08-15 |
DE19980335D2 (en) | 2001-05-17 |
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