WO2000067967A1 - Saw device and saw blade unit therefor - Google Patents
Saw device and saw blade unit therefor Download PDFInfo
- Publication number
- WO2000067967A1 WO2000067967A1 PCT/SE2000/000908 SE0000908W WO0067967A1 WO 2000067967 A1 WO2000067967 A1 WO 2000067967A1 SE 0000908 W SE0000908 W SE 0000908W WO 0067967 A1 WO0067967 A1 WO 0067967A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- saw
- driving shaft
- cone surface
- saw blade
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/29—Details; Component parts; Accessories
- B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
- B27B5/34—Devices for securing a plurality of circular saw blades on a single saw spindle; Equipment for adjusting the mutual distance
Definitions
- this invention relates to a saw device including a driving shaft that is rotatable around a geometrical central axis, said shaft having a plurality of inter-parallel saw blades, which are co-rotatively connected to a sleeve that is detachably located on a front, cantilever part of the driving shaft, which sleeve in turn is co-rotatively connected to the driving shaft and on which there are, on one hand, spacing elements between adjacent saw blades, and, on the other hand, means for holding the saw blades and the spacing elements at positions fixed axially along the sleeve, thereby forming an assembly that may be separately mounted on and demounted from said shaft part.
- EP 0 543 789 discloses an example of a saw device of the general type as presented in the introduction.
- a device having a sleeve being demountably arranged on a driving shaft and having a plurality of saw blades that are internally separated by means of spacing elements in the form of rings.
- a cutter On the outside of each outer saw blade is provided a cutter.
- the cutters and the blades are fastened by means of outer rings, the whole set of saw blades, cutters and rings being fixed between a stop flange at one end of the sleeve and a tightenable nut at the opposed end of the sleeve.
- the sleeve and the appurtenant details are fixed upon the cantilever part of the driving shaft by means of a screw that is tightened in an axial, threaded hole in the driving shaft per se .
- a drawback of the saw device that is schematically illustrated in EP 0 543 789 is that the blade- carrying sleeve quite simply has a cylindrical inner surface' that is intended to cooperate by a snug fit with a cylindrical envelope surface on the cantilever part of the driving shaft.
- the requirement of a snug fit involves difficulties on one hand in so far as the measure tolerances at manufacture not always become optimal, and on the other hand in so far as the mounting of the sleeve on the shaft as well as the demounting of the sleeve from the same become laborious and time-consuming.
- a primary object of the invention is to provide a saw device, whose blade-carrying sleeve is reliably centered relative to the geometrical axis of rotation of the driving shaft and fixed in a play-free condition upon the driving shaft without the operator having to take any complicated measures in connection with a resetting. It is also an object to provide a saw device whose sleeve and saw blades may be mounted and demounted in a simple, quick and smooth way. Morover, the invention aims at providing a device the blade-carrying sleeve of which may be mounted and demounted on several occasions without causing any wear damages on the driving shaft per se; all this in order to guarantee a good useful life thereof.
- the invention also aims at creating a saw blade unit and a saw blade of a new type.
- the features of these are given in claims 6 to 9.
- Fig. 1 is a machine in which are included two saw devices according to the invention, the one saw device being shown with a saw blade unit mounted on the appurtenant driving shaft, while the other one is shown with the saw blade unit being demounted from the driving shaft, Fig. 2 is an enlarged, partly cut exploded view showing on one hand a front part of the driving shaft, and on the other hand said saw blade unit being separated from the driving shaft, Fig. 3 is a longitudinal section showing the saw blade unit mounted on the driving shaft, Fig. 4 is a side view of an individual saw blade, and
- Fig. 5 is a cut exploded view showing different saw blades and spacing elements separated from a sleeve included in the saw blade unit.
- the machine shown in Fig. 1 comprises two driving shafts 1 which are separately rotatable around geometrical axes of rotation designated A, of which shafts one is visible and designated 1.
- the shafts are mounted in bearings in two bearing housings 2 mounted in a stand generally designated 3.
- the driving shafts 1 are rotatable by means of suitable driving sources 4, e.g., electric motors and suitable gears.
- On a front cantilever part of each shaft is mounted a detachable unit 5 which, besides a carrying sleeve 6 (see Fig. 2), comprises a set of circular saw blades 7, whose number according to the example amounts to five.
- One saw blade unit 5 is mounted above the other one, the two units moreover being displaced laterally (perpendicularly to the plane of the drawing) relative to each other, so that the lower peripherical portions on the upper blades may be located somewhat underneath the level of the upper peripherical portions of the lower blades. Furthermore, it should be pointed out that the blades are inter-parallel, cooperating pairs of blades in the upper and lower units being located in a common vertical plane. This involves that a saw ' object passing between the driving shafts (perpendicularly to the plane of the drawing), e.g., a trunk block, may be imparted with board-separating through saw cuts extending vertically.
- a saw ' object passing between the driving shafts perpendicularly to the plane of the drawing
- a trunk block may be imparted with board-separating through saw cuts extending vertically.
- the driving shaft 1 comprises on one hand a comparatively study rear part 8 that is mounted in bearings in the appurtenant bearing housing in the machine, and on the other hand a front cantilever part 9 that is more slender than the part 8.
- a tapering transition portion between the shaft parts 8, 9 is designated 10.
- the shaft part 9 is delimited by a rear cylindrical surface and a long, somewhat tapering surface which at its front transposes into a pronouncedly conical surface 11, which in turn transposes into a reduced section 12 of cylindrical shape.
- the reduced section 12 transposes via a transversal ringshaped shoulder surface into an outer end section 12' having a smallest diameter.
- a gable surface, being perpendicular relative to the axis of rotation, on the end section 12' is designated 13.
- the sleeve 6 has a cylindrical basic shape and has at its rear end an internal cone surface 14 that widens in a direction rearwardly.
- An analogous front cone surface 15 widens in a direction forwardly.
- This cone surface is provided on a thickened portion of the sleeve designated 16. More specifically, this thickened portion 16 is formed on the inside of the sleeve.
- this cone surface 15 transposes into a cylindrical surface 17, whose diameter substantially coincides with the outer diameter of the reduced section 12 of the shaft part 9.
- the cylinder surface 17 transposes into a generally rotation-symmetrical surface 18 that comprises on one hand a conical surface and on the other hand a cylindrical or possibly a slightly conical surface.
- the envelope surface 19 of the sleeve 6 has a cylindrical basic shape.
- the sleeve 6 has an outwardly directed flange 20 that carries a sealing ring 21.
- a number of threaded holes 22 are recessed for equally many screws 23, by means of which a clamping ring 24 may be fastened in a direction towards the end surface of the sleeve.
- the clamping ring 24 has the purpose of fixing the saw blades 7 and a number of rings 25 on the sleeve 6. Of these rings, four serve as spacing elements between the five saw blades, while the two rings on the outside of each outer saw blade mainly have the purpose of clamping each outer saw blade against the adjacent inner spacing ring.
- planar shoulder surface 26 of the clamping ring 24 is only borne against by a corresponding, planar bearing surface 26' on the front ring 25, i.e., without coming in contact with the sleeve 6 per se .
- a co- rotative connection between the sleeve 6 and the driving shaft 1 may be attended to in different ways. For instance, in the rear end of the sleeve may be provided a number of peripherically separated seats (not shown) for the accomodation of equally many male elements (not shown) on the driving shaft. It should also be mentioned that ring-shaped carriers having cutters (not shown) may be provided between the outside of the two outer saw blades and the outermost rings 25.
- Fig. 5 together form a separate unit that may be mounted on and separated from the shaft part 9. Then a variable number of saw blades may be applied on the sleeve at an internal distance that may be varied by the use of differently wide rings 25. In other words, the saw blades may be set on the sleeve in a separate operation, separated from the machine.
- reference numeral 27 designates a conical ring which has an external cone surface 28 which in a mounted state tapers off in a direction rearwards.
- This conical ring 27 cooperates with a nut 29 that has an internal thread (lacking a reference numeral) for the application on an external thread (lacking a reference numeral) on a central cylinder-shaped carrier body 30.
- this carrier body 30 there are a suitable number (e.g., four) of holes 31 for screws 32 (see Fig. 3), by means of which the carrier body may be fixed on the gable surface 13 of the shaft part 9, more precisely by tightening ' the screws in a corresponding number of axial threaded holes in the shaft part 9.
- the conical ring is slitted by a transversal slit, to be able to yield when being wedged up.
- a special slit-ring designated 33 is provided outside the external, thinnest end section 12' of the shaft part.
- a further ring 34 is provided in connection to the transition portion 10 of the driving shaft.
- This ring 34 bears against a transversal bearing surface 35 on the transition portion 10 and has a conical surface 36 that tapers off in a direction forwards.
- the cone surface 36 it is feasible to shape the cone surface 36 directly on the driving shaft as such, but it is preferred to use the special ring 34 that may be replaced after wearing out.
- the ring 34 constitutes a wear ring.
- the ring 34 may be slitted by a transversal slit.
- FIG. 3 shows the device according to the invention in an assembled and mounted state.
- the rear cone surface 14 of the sleeve 6 bears against the cone surface 36 of the ring 34.
- the cone surface 28 on the conical ring 27 is laid against the front cone surface 15 on the inside of the sleeve. Further, the cylindrical inner surface of the conical ring 27 bears against the outside of the slit-ring 33, which in turn is mounted snugly on the shaft section 12' .
- the sleeve 6 is slipped onto the shaft part and moved to a rear end position, in which the conical surface 14 is set against the cone surface 36.
- the conical ring 27 is inserted between the cone surface 15 and the slit-ring 33, whereafter the nut 29 is tightened on the external thread of the carrier body 30.
- the ring 27 is wedged up between the sleeve 6 and the driving shaft in order to jointly with the cooperating cone surfaces 14, 36 on one hand center the sleeve relative to the geometrical axis of rotation A, and on the other hand firmly fix the sleeve in a play-free condition.
- the rotation- symmetrical (conical and cylindrical) surface 18 that extends along the major part of the length of the sleeve has a diameter that throughout is at least somewhat larger than the diameter of the corresponding rotation-symmetrical surface on the shaft part 9.
- a ring-shaped gap 37 is formed between the inside of the sleeve and the outside of the shaft part 9.
- the demounting of the saw blade unit 5 from the driving shaft is realized by the simple measure of untightening the nut 29 and removing the conical ring 27, whereafter the unit may be pulled off from the driving shaft.
- the saw blade unit that is illustrated in Fig. 5 is characterized not only by the above-mentioned new features of the sleeve as such, but also by the new features of the individual saw blade 7 that is illustrated in Fig. 4.
- this saw blade has a center hole 38 and a peripherical rim of saw teeth 40.
- a plurality of inter-separated protrusions 39 are formed in connection with the hole 38, i.e., at the hole edge surface of the blade. These protrusions 39 cooperate with a number of tangentially separated grooves (not shown) extending axially on the outside of the sleeve 6.
- a further advantage of the invention besides the above-mentioned freedom from play and the centering possibility, is that the thread on the driving shaft required for the tightening nut 29, is provided on a carrier body 30 that is detachably connected with the driving shaft, more specifically via the screw joint 32.
- the carrier body 30 may be made either in a left-handed embodiment or in a right- handed embodiment, whereby the nut may be reliably secured on the driving shaft, independently of the direction of rotation of the latter, i.e., independently of whether the blade set unit is mounted on the upper or lower shaft in the machine according to Fig. 1.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU47933/00A AU4793300A (en) | 1999-05-10 | 2000-05-08 | Saw device and saw blade unit therefor |
DE60004056T DE60004056T2 (en) | 1999-05-10 | 2000-05-08 | SAWING DEVICE AND SAW BLADE THEREFOR |
AT00930040T ATE245514T1 (en) | 1999-05-10 | 2000-05-08 | SAWING DEVICE AND SAW BLADE THEREFOR |
EP00930040A EP1192025B1 (en) | 1999-05-10 | 2000-05-08 | Saw device and saw blade unit therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9901697-4 | 1999-05-10 | ||
SE9901697A SE514104C2 (en) | 1999-05-10 | 1999-05-10 | Sawing device and saw blade unit for this |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000067967A1 true WO2000067967A1 (en) | 2000-11-16 |
Family
ID=20415538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2000/000908 WO2000067967A1 (en) | 1999-05-10 | 2000-05-08 | Saw device and saw blade unit therefor |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1192025B1 (en) |
AT (1) | ATE245514T1 (en) |
AU (1) | AU4793300A (en) |
DE (1) | DE60004056T2 (en) |
SE (1) | SE514104C2 (en) |
WO (1) | WO2000067967A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020154752A3 (en) * | 2019-01-30 | 2020-11-12 | Haeupl Christian | Dual-spindle circular saw for sawing wood |
TWI736187B (en) | 2020-03-20 | 2021-08-11 | 張聰捷 | Woodworking saw blade locking structure |
CN113492443A (en) * | 2020-04-01 | 2021-10-12 | 张聪捷 | Locking structure for carpentry saw blade |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0543789A1 (en) * | 1991-11-18 | 1993-05-26 | Kauko Rautio | A fastening system for a rip-saw blade and a chipping edger |
-
1999
- 1999-05-10 SE SE9901697A patent/SE514104C2/en not_active IP Right Cessation
-
2000
- 2000-05-08 AT AT00930040T patent/ATE245514T1/en not_active IP Right Cessation
- 2000-05-08 DE DE60004056T patent/DE60004056T2/en not_active Expired - Fee Related
- 2000-05-08 WO PCT/SE2000/000908 patent/WO2000067967A1/en active IP Right Grant
- 2000-05-08 EP EP00930040A patent/EP1192025B1/en not_active Expired - Lifetime
- 2000-05-08 AU AU47933/00A patent/AU4793300A/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0543789A1 (en) * | 1991-11-18 | 1993-05-26 | Kauko Rautio | A fastening system for a rip-saw blade and a chipping edger |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020154752A3 (en) * | 2019-01-30 | 2020-11-12 | Haeupl Christian | Dual-spindle circular saw for sawing wood |
US20220176581A1 (en) * | 2019-01-30 | 2022-06-09 | Christian Häupl | Dual-spindle circular saw for sawing wood |
TWI736187B (en) | 2020-03-20 | 2021-08-11 | 張聰捷 | Woodworking saw blade locking structure |
CN113492443A (en) * | 2020-04-01 | 2021-10-12 | 张聪捷 | Locking structure for carpentry saw blade |
Also Published As
Publication number | Publication date |
---|---|
ATE245514T1 (en) | 2003-08-15 |
SE9901697L (en) | 2000-11-11 |
EP1192025A1 (en) | 2002-04-03 |
AU4793300A (en) | 2000-11-21 |
SE514104C2 (en) | 2001-01-08 |
EP1192025B1 (en) | 2003-07-23 |
SE9901697D0 (en) | 1999-05-10 |
DE60004056T2 (en) | 2004-06-03 |
DE60004056D1 (en) | 2003-08-28 |
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