CA2216922C - A saw axle and a saw blade which can be fitted onto the axle - Google Patents
A saw axle and a saw blade which can be fitted onto the axle Download PDFInfo
- Publication number
- CA2216922C CA2216922C CA002216922A CA2216922A CA2216922C CA 2216922 C CA2216922 C CA 2216922C CA 002216922 A CA002216922 A CA 002216922A CA 2216922 A CA2216922 A CA 2216922A CA 2216922 C CA2216922 C CA 2216922C
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- Prior art keywords
- axle
- saw
- blade
- sleeve
- blades
- Prior art date
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- Expired - Fee Related
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- 230000007704 transition Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000009418 renovation Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B27B5/32—Devices for securing circular saw blades to the saw spindle
-
- 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
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/02—Circular saw blades
- B23D61/025—Details of saw blade body
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Harvester Elements (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
A saw axle for floatingly supporting a plurality of saw blades which are dogged by the rotational movement of the axle as a result of form-locking between the outer contour of the axle (4) and corresponding holes in respective blades. The outer contour of the axle (4) and the contour of the blade-mounting hole each have three main sides for achieving statically determined three-point contact between axle and blade. The axle preferably comprises a core axle (1) and a sleeve (4) non-rotatably mounted thereon, wherein the outer contour of the sleeve presents the aforesaid three main surfaces. The invention also relates to a saw blade which can be fitted onto the axle.
Description
WO 96!31310 PCTISE96100447 A SAW AXLE AND A SAW BLADE WHICH CAN BE FITTED ONTO
THE AXLE
The present invention relates to a.saw axle for floatingly supporting a plurality of saw blades, which are caused to ~ 5 rotate with the axle by. virtue of a form-locking effect achieved between the outer contour of the axle and corre~-sponding holes in respective saw blades. The invention als«
relates to a saw blade for use with such an axle.
Circular saws that are used to saw logs and blocks into smaller dimensions include a plurality of axle-mounted saga blades. The saw blades are usually fitted floatingly on thc=
axle, i.e. are loosely displaceable thereon, therewith simplifying relative positional changes between the blades for adaptation to different blade settings, among other things. Each blade is guided by outer blade guides which coact with said blade and which can be moved between differ--ent blade positions along the axle.
The blades are dogged by the rotating axle through the medium of splines, the axle being provided with a plurality o:E
radially outwardly projecting splines which extend axially along the axle, wherein the blades are provided with corre-sponding recesses for coaction with the axle-mounted splines,:
see US-A-3,516,460, for instance.
One drawback with the use of splines is that the blades area liable to wear grooves in the splines at those regions wherEs the blades are in contact therewith. This can cause problems when wishing to move floatingly-mounted blades through a very short distance to a new blade setting, since the grooves tend to return the blades to their old setting and therewith make it difficult to finely adjust the blade settings.
Furthermore, when a plurality of splines are used the' attachment is not statically determined, since it is not.
THE AXLE
The present invention relates to a.saw axle for floatingly supporting a plurality of saw blades, which are caused to ~ 5 rotate with the axle by. virtue of a form-locking effect achieved between the outer contour of the axle and corre~-sponding holes in respective saw blades. The invention als«
relates to a saw blade for use with such an axle.
Circular saws that are used to saw logs and blocks into smaller dimensions include a plurality of axle-mounted saga blades. The saw blades are usually fitted floatingly on thc=
axle, i.e. are loosely displaceable thereon, therewith simplifying relative positional changes between the blades for adaptation to different blade settings, among other things. Each blade is guided by outer blade guides which coact with said blade and which can be moved between differ--ent blade positions along the axle.
The blades are dogged by the rotating axle through the medium of splines, the axle being provided with a plurality o:E
radially outwardly projecting splines which extend axially along the axle, wherein the blades are provided with corre-sponding recesses for coaction with the axle-mounted splines,:
see US-A-3,516,460, for instance.
One drawback with the use of splines is that the blades area liable to wear grooves in the splines at those regions wherEs the blades are in contact therewith. This can cause problems when wishing to move floatingly-mounted blades through a very short distance to a new blade setting, since the grooves tend to return the blades to their old setting and therewith make it difficult to finely adjust the blade settings.
Furthermore, when a plurality of splines are used the' attachment is not statically determined, since it is not.
known whether or not the blade has contact with all splines when a sawing operation is started.
A conventional splined axle is relatively expensive to renovate, since it is necessary to remove the entire axle and possibly send the axle to a workshop to be reground, which is an expensive exercise.
One object of the present invention is to provide an axle on which saw blades can be floatingly-mounted and which provides statically determined contact with respective saw blades.
Another object is to provide such an axle which can be manufactured at relatively low cost, which is easy to grind and whose surfaces can be readily treated, and which can be renovated in a cost-effective manner when so required.
Still another object of the invention is to provide a saw blade that can be mounted on an inventive axle.
Summary of the Invention In accordance with one aspect of the present invention there is provided a saw axle in combination with a plurality of saw blades, said saw axle floatingly supporting the plurality of saw blades, which are coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and matingly configured centre holes in respective saw blades, wherein: a) both the outer contour of the axle and a contour of the centre hole in each saw blade present, exclusively, three symmetrical arcuate main Bides of uniform 2a length for obtaining a statically determined three-point contact between axle and blades; b) the three sides have the shape of circular arcs having a same, constant radius of curvature; c) the centres of the arcs form respective corners of an equilateral triangle; d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blades is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blades without the use of any expandable fasteners.
In accordance with another aspect of the present invention there is provided a saw blade in combination with and floatingly fitted to a saw axle and coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and a matingly configured centre hole in the saw blade, wherein: a) said centre hole defines, exclusively, three symmetrical arcuate main sides of uniform length and arcuate transitions therebetween; b) the three sides have the shape of circular arcs having a same, constant radius of curvature; c) the centres of the arcs form respective corners of an equilateral triangle; d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blade is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blade without the use of any expandable fasteners.
In accordance with the invention, the first object is achieved with a saw axle of the kind defined in the introduction which is characterized in that both the outer contour of the axle and the contour of the blade-mounting . CA 02216922 2000-02-17 2b hole present three main sides for achieving statically determined three-point contact between axle and blade.
As a result of this three-point contact, the blades will be self-centred relative to their rotational axes while being easily adjusted to desired positions in the longitudinal direction of the axle. A three-sided axle constructed with the invention is relatively easy to produce and treat.
The three Bides of the axle are suitably arcuate in shape, e.g. circular-arcuate, with the centres of respective arcs lying at the corners of an equilateral triangle.
W O 96131310 PCTlSE96I00441 According to one preferred embodiment, the three arcuat:e sides merge together via arcuate parts whose radius of curvature is smaller than the radius of curvature of the main sides. Despite having three sides, an axle of this construe-tion will have high mechanical strength while requiring th.e r provision of only relatively small holes in the saw blade, meaning that the available useful saw radius of the blade will be relatively large.
In a particularly preferred embodiment, the axle comprises a core axle and a sleeve non-rotatably mounted thereon, wherein the outer contour of said sleeve presents said three main surfaces for coaction with corresponding main surfaces of respective blade-mounting holes.
When renovating an axle of this construction, all that is needed is to remove the sleeve from the axle and to send tha sleeve to a workshop for re-grinding, if necessary.
The core axle and the inner surface of the sleeve ar~~
preferably circular in shape, wherein the sleeve is held firmly to the axle with the aid of at least one clamping joint. The sleeve may be provided with passageways through which oil under pressure can be delivered to a space between the core axle and the sleeve for separating the same in an axial direction.
This thus facilitates fitting of the sleeve to the axle anc~
its removal therefrom, therewith also facilitating renovation of the sleeve, among other things.
Other features of an inventive saw axle and an inventive saw blade will be apparent from the following Claims.
The invention will now be described in more detail with.
reference to an exemplifying embodiment thereof and also with reference to the accompanying drawings, in which Fig. 1 is a partially sectioned view of one embodiment of an inventive axle comprised of a core axle and a surrounding sleeve; s Fig. 2 is an end view ofl.the axl.e_ shown in Fig. l, as seen in the direction of the arrows It-II; and Fig. 3 illustrates an inventive saw blade which can be fitted to the axle shown in Figs. 1 and 2.
Fig. 1 illustrates a core axle 1 having a conically tapering end-part or trunnion 2 which is intended to be supported in a bearing, not shown. The inner end 3 of the axle is rotat-ably mounted in a saw frame (not shown) and driven in a desired, conventional manner. The core axle is surrounded by an outer axle sleeve 4 provided with a through-penetrating bore for accommodating the core axle 1. The bore has a circular cross-section of different diameters over different parts in accordance with the different parts of the core axle Z, which also has a circular cross-sectional shape.
As will be seen from Fig. 2, the outer contour of the sleeve 4 comprises three main sides which in the case of the illustrated embodiment are comprised of circular-arcuate surfaces whose centres are located at the corners of an equilateral triangle located inwardly of the arcs. The arcuate main Bides merge with one another via circular arcuate parts of smaller radius of curvature, the centres of said parts also lying at the corners of the equilateral triangle.
One of the advantages afforded is that as a result of the outer configuration of the sleeve, the stress concentrations therein will be low and the fatigue strength of the sleeve commensurately high. The use of such an outer profile for a saw axle on which inventive saw blades 17 having a centre hole 18 adapted to the profile of the sleeve (see Fig. 3) are W O 96131310 PCTlSE96/00445' floatingly-mounted provides significant advantages. As tree axle and the mounting holes in the saw blades have three main sides, the positions of the blades will always be statical7.y determined as a result of said three-point contact. The saw y 5 blades are thus self-centering around the rotational axiss.
The arcuate abutment surfaces o~ the axle and the blade:-mounting hole respectively also results in successive contacts over a longer distance than that achieved with conventional splines. This results in a larger abutment and force-tran.-mission surface and therewith less risk of grooves being worn in the outer surface of the sleeve 4 among other things, such grooves otherwise making it difficult to finely adjust the settings of the blades, as mentioned above.
An axle according to the Fig. 1 embodiment also provides the advantage that in the event of any damage, it is only necessary to draw the sleeve 4 from the axle 1 and send the sleeve to a workshop for renovation. The sleeve 4 is secured to the core axle 1 to this end with the aid of a clamping joint 5, which may be of any convenient, known kind. In the illustrated case, the clamping joint includes two conical, flanged sleeves 6, 7 which are displaced relative to one another with the aid of tightening screws 8 which function to tighten the sleeve 4 on the axle 1. The reference numeral 9 identifies a spacing ring which functions to prevent undesirable movement between the various elements.
The sleeve 4 includes parts 10, 11 which have a centering function in coaction with the core axle 1, wherein a certain amount of clearance exists between the sleeve and the axle along the part 12 intermediate of said centering parts 10, 11. The space provided by this clearance is connected to oil inlet and oil outlet passageways 13 and 14 respectively, wherein oil is also delivered through said space to a circumferentially extending groove 15 via a passageway 1~
provided in the inner surface of the sleeve 4.
When wishing to remove the sleeve from the core axle 4, e.g.
for renovating purposes, a pressure oil source is connected to the passageway 13 and air is allowed to pass out through ' the passageway 14 at the same time. The pressure exerted by the oil will cause the sleeve 4 to be pushed from the core axle 1 to the right in Fig. 1.'The sleeve 4 can thus be removed easily from the axle 1 with the axle left mounted in the machine. Only the journal bearing coacting with the trunnion 2 need be swung to one side. When the sleeve has been renovated, the sleeve can be readily refitted to the axle 1 and clamped firmly thereto with the aid of the clamping joint 5. The invention thus simplifies renovation of the axle and substantially reduces the costs entailed thereby.
An axle that is constructed in accordance with the aforegoing is easier to manufacture than conventional splined axles.
Scratches and the like can also be ground or polished away and surface coatings applied more easily than in the case of conventional splined axles, due to the smooth and even surfaces of the inventive axle. The use of a three-sided axle having rounded or cut corners provides the advantages of static determined contact with the holes in the saw blades while retaining the largest possible "useful" blade radius to enable logs and blocks of large dimensions to be sawn. A
purely triangular shape would greatly reduce the maximum sawing measurement.
The invention has been described in the aforegoing with reference to a preferred embodiment thereof where the axle comprises a core axle and a sleeve surrounding the axle. It , lies within the purview of the invention, however, to provide a solid saw axle with the aforedescribed outer contour so as , to obtain the desired three-point contact and to dispense with the use of a surrounding sleeve.
WO 96131310 PCT/SE96/0044'1 It will be understood that the sides of the three-sided axle/sleeve may have a curvature other than a purely circular curvature, as may also the transitions between the main sides of the axle/sleeve. The use of rounded transitions between A 5 said Bides, however, is~~advantageous from the aspect of stress concentrations in comparison with abrupt transitions, although such transitions are nevertheless conceivable. It will also be understood that when a sleeve is used, the manner in which the sleeve is held firmly on the core axle and the forms of the coating parts may be varied as desired without departing from the scope of the inventive concept.
The blade toothing may also be varied in accordance with the use for which the blade is intended.
A conventional splined axle is relatively expensive to renovate, since it is necessary to remove the entire axle and possibly send the axle to a workshop to be reground, which is an expensive exercise.
One object of the present invention is to provide an axle on which saw blades can be floatingly-mounted and which provides statically determined contact with respective saw blades.
Another object is to provide such an axle which can be manufactured at relatively low cost, which is easy to grind and whose surfaces can be readily treated, and which can be renovated in a cost-effective manner when so required.
Still another object of the invention is to provide a saw blade that can be mounted on an inventive axle.
Summary of the Invention In accordance with one aspect of the present invention there is provided a saw axle in combination with a plurality of saw blades, said saw axle floatingly supporting the plurality of saw blades, which are coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and matingly configured centre holes in respective saw blades, wherein: a) both the outer contour of the axle and a contour of the centre hole in each saw blade present, exclusively, three symmetrical arcuate main Bides of uniform 2a length for obtaining a statically determined three-point contact between axle and blades; b) the three sides have the shape of circular arcs having a same, constant radius of curvature; c) the centres of the arcs form respective corners of an equilateral triangle; d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blades is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blades without the use of any expandable fasteners.
In accordance with another aspect of the present invention there is provided a saw blade in combination with and floatingly fitted to a saw axle and coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and a matingly configured centre hole in the saw blade, wherein: a) said centre hole defines, exclusively, three symmetrical arcuate main sides of uniform length and arcuate transitions therebetween; b) the three sides have the shape of circular arcs having a same, constant radius of curvature; c) the centres of the arcs form respective corners of an equilateral triangle; d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blade is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blade without the use of any expandable fasteners.
In accordance with the invention, the first object is achieved with a saw axle of the kind defined in the introduction which is characterized in that both the outer contour of the axle and the contour of the blade-mounting . CA 02216922 2000-02-17 2b hole present three main sides for achieving statically determined three-point contact between axle and blade.
As a result of this three-point contact, the blades will be self-centred relative to their rotational axes while being easily adjusted to desired positions in the longitudinal direction of the axle. A three-sided axle constructed with the invention is relatively easy to produce and treat.
The three Bides of the axle are suitably arcuate in shape, e.g. circular-arcuate, with the centres of respective arcs lying at the corners of an equilateral triangle.
W O 96131310 PCTlSE96I00441 According to one preferred embodiment, the three arcuat:e sides merge together via arcuate parts whose radius of curvature is smaller than the radius of curvature of the main sides. Despite having three sides, an axle of this construe-tion will have high mechanical strength while requiring th.e r provision of only relatively small holes in the saw blade, meaning that the available useful saw radius of the blade will be relatively large.
In a particularly preferred embodiment, the axle comprises a core axle and a sleeve non-rotatably mounted thereon, wherein the outer contour of said sleeve presents said three main surfaces for coaction with corresponding main surfaces of respective blade-mounting holes.
When renovating an axle of this construction, all that is needed is to remove the sleeve from the axle and to send tha sleeve to a workshop for re-grinding, if necessary.
The core axle and the inner surface of the sleeve ar~~
preferably circular in shape, wherein the sleeve is held firmly to the axle with the aid of at least one clamping joint. The sleeve may be provided with passageways through which oil under pressure can be delivered to a space between the core axle and the sleeve for separating the same in an axial direction.
This thus facilitates fitting of the sleeve to the axle anc~
its removal therefrom, therewith also facilitating renovation of the sleeve, among other things.
Other features of an inventive saw axle and an inventive saw blade will be apparent from the following Claims.
The invention will now be described in more detail with.
reference to an exemplifying embodiment thereof and also with reference to the accompanying drawings, in which Fig. 1 is a partially sectioned view of one embodiment of an inventive axle comprised of a core axle and a surrounding sleeve; s Fig. 2 is an end view ofl.the axl.e_ shown in Fig. l, as seen in the direction of the arrows It-II; and Fig. 3 illustrates an inventive saw blade which can be fitted to the axle shown in Figs. 1 and 2.
Fig. 1 illustrates a core axle 1 having a conically tapering end-part or trunnion 2 which is intended to be supported in a bearing, not shown. The inner end 3 of the axle is rotat-ably mounted in a saw frame (not shown) and driven in a desired, conventional manner. The core axle is surrounded by an outer axle sleeve 4 provided with a through-penetrating bore for accommodating the core axle 1. The bore has a circular cross-section of different diameters over different parts in accordance with the different parts of the core axle Z, which also has a circular cross-sectional shape.
As will be seen from Fig. 2, the outer contour of the sleeve 4 comprises three main sides which in the case of the illustrated embodiment are comprised of circular-arcuate surfaces whose centres are located at the corners of an equilateral triangle located inwardly of the arcs. The arcuate main Bides merge with one another via circular arcuate parts of smaller radius of curvature, the centres of said parts also lying at the corners of the equilateral triangle.
One of the advantages afforded is that as a result of the outer configuration of the sleeve, the stress concentrations therein will be low and the fatigue strength of the sleeve commensurately high. The use of such an outer profile for a saw axle on which inventive saw blades 17 having a centre hole 18 adapted to the profile of the sleeve (see Fig. 3) are W O 96131310 PCTlSE96/00445' floatingly-mounted provides significant advantages. As tree axle and the mounting holes in the saw blades have three main sides, the positions of the blades will always be statical7.y determined as a result of said three-point contact. The saw y 5 blades are thus self-centering around the rotational axiss.
The arcuate abutment surfaces o~ the axle and the blade:-mounting hole respectively also results in successive contacts over a longer distance than that achieved with conventional splines. This results in a larger abutment and force-tran.-mission surface and therewith less risk of grooves being worn in the outer surface of the sleeve 4 among other things, such grooves otherwise making it difficult to finely adjust the settings of the blades, as mentioned above.
An axle according to the Fig. 1 embodiment also provides the advantage that in the event of any damage, it is only necessary to draw the sleeve 4 from the axle 1 and send the sleeve to a workshop for renovation. The sleeve 4 is secured to the core axle 1 to this end with the aid of a clamping joint 5, which may be of any convenient, known kind. In the illustrated case, the clamping joint includes two conical, flanged sleeves 6, 7 which are displaced relative to one another with the aid of tightening screws 8 which function to tighten the sleeve 4 on the axle 1. The reference numeral 9 identifies a spacing ring which functions to prevent undesirable movement between the various elements.
The sleeve 4 includes parts 10, 11 which have a centering function in coaction with the core axle 1, wherein a certain amount of clearance exists between the sleeve and the axle along the part 12 intermediate of said centering parts 10, 11. The space provided by this clearance is connected to oil inlet and oil outlet passageways 13 and 14 respectively, wherein oil is also delivered through said space to a circumferentially extending groove 15 via a passageway 1~
provided in the inner surface of the sleeve 4.
When wishing to remove the sleeve from the core axle 4, e.g.
for renovating purposes, a pressure oil source is connected to the passageway 13 and air is allowed to pass out through ' the passageway 14 at the same time. The pressure exerted by the oil will cause the sleeve 4 to be pushed from the core axle 1 to the right in Fig. 1.'The sleeve 4 can thus be removed easily from the axle 1 with the axle left mounted in the machine. Only the journal bearing coacting with the trunnion 2 need be swung to one side. When the sleeve has been renovated, the sleeve can be readily refitted to the axle 1 and clamped firmly thereto with the aid of the clamping joint 5. The invention thus simplifies renovation of the axle and substantially reduces the costs entailed thereby.
An axle that is constructed in accordance with the aforegoing is easier to manufacture than conventional splined axles.
Scratches and the like can also be ground or polished away and surface coatings applied more easily than in the case of conventional splined axles, due to the smooth and even surfaces of the inventive axle. The use of a three-sided axle having rounded or cut corners provides the advantages of static determined contact with the holes in the saw blades while retaining the largest possible "useful" blade radius to enable logs and blocks of large dimensions to be sawn. A
purely triangular shape would greatly reduce the maximum sawing measurement.
The invention has been described in the aforegoing with reference to a preferred embodiment thereof where the axle comprises a core axle and a sleeve surrounding the axle. It , lies within the purview of the invention, however, to provide a solid saw axle with the aforedescribed outer contour so as , to obtain the desired three-point contact and to dispense with the use of a surrounding sleeve.
WO 96131310 PCT/SE96/0044'1 It will be understood that the sides of the three-sided axle/sleeve may have a curvature other than a purely circular curvature, as may also the transitions between the main sides of the axle/sleeve. The use of rounded transitions between A 5 said Bides, however, is~~advantageous from the aspect of stress concentrations in comparison with abrupt transitions, although such transitions are nevertheless conceivable. It will also be understood that when a sleeve is used, the manner in which the sleeve is held firmly on the core axle and the forms of the coating parts may be varied as desired without departing from the scope of the inventive concept.
The blade toothing may also be varied in accordance with the use for which the blade is intended.
Claims (7)
1. A saw axle in combination with a plurality of saw blades, said saw axle floatingly supporting the plurality of saw blades, which are coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and matingly configured centre holes in respective saw blades, wherein:
a) both the outer contour of the axle and a contour of the centre hole in each saw blade present, exclusively, three symmetrical arcuate main sides of uniform length for obtaining a statically determined three-point contact between axle and blades;
b) the three sides have the shape of circular arcs having a same, constant radius of curvature;
c) the centres of the arcs form respective corners of an equilateral triangle;
d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blades is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blades without the use of any expandable fasteners.
a) both the outer contour of the axle and a contour of the centre hole in each saw blade present, exclusively, three symmetrical arcuate main sides of uniform length for obtaining a statically determined three-point contact between axle and blades;
b) the three sides have the shape of circular arcs having a same, constant radius of curvature;
c) the centres of the arcs form respective corners of an equilateral triangle;
d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blades is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blades without the use of any expandable fasteners.
2. A saw axle and blade combination according to Claim 1, wherein the three arcuate sides merge with one another via circular-arcuate parts whose radius of curvature is smaller than the radius of curvature of the main sides.
3. A saw axle and blade combination according to Claim 2, wherein the arcuate parts of smaller curvature radius have their centres in respective corners of said equilateral triangle.
4. A saw axle and blade combination according to Claim 1, 2 or 3, wherein the axle includes a core axle and a sleeve non-rotatably fitted on said core axle; and outer contour of said sleeve defines said three sides.
5. A saw axle and blade combination according to Claim 4, wherein the core axle and an inner surface of the sleeve are circular; and the sleeve is clamped on the axle by at least one clamping joint.
6. A saw axle and blade combination according to Claim 5, wherein the sleeve is provided with passageways through which oil under pressure can be delivered to a space between the core axle and the sleeve for separating said axle and said sleeve in an axial direction.
7. A saw blade in combination with and floatingly fitted to a saw axle and coupled with the axle for rotation therewith by a form fit between an outer contour of the axle and a matingly configured centre hole in the saw blade, wherein:
a) said centre hole defines, exclusively, three symmetrical arcuate main sides of uniform length and arcuate transitions therebetween;
b) the three sides have the shape of circular arcs having a same, constant radius of curvature;
c) the centres of the arcs form respective corners of an equilateral triangle;
d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blade is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blade without the use of any expandable fasteners.
a) said centre hole defines, exclusively, three symmetrical arcuate main sides of uniform length and arcuate transitions therebetween;
b) the three sides have the shape of circular arcs having a same, constant radius of curvature;
c) the centres of the arcs form respective corners of an equilateral triangle;
d) a centre of said triangle is coincident with a centre axis of said axle; and e) the coupling between the axle and the blade is exclusively provided by the matingly configured outer contour of the axle and the centre hole of the blade without the use of any expandable fasteners.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE950126-3 | 1995-04-05 | ||
| SE9501261A SE506537C2 (en) | 1995-04-05 | 1995-04-05 | Saw shaft for liquid mounting of a number of saw blades as a result of mold locking and a saw blade to be mounted on shaft |
| PCT/SE1996/000447 WO1996031310A1 (en) | 1995-04-05 | 1996-04-04 | A saw axle and a saw blade which can be fitted onto the axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2216922A1 CA2216922A1 (en) | 1996-10-10 |
| CA2216922C true CA2216922C (en) | 2001-01-16 |
Family
ID=20397859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002216922A Expired - Fee Related CA2216922C (en) | 1995-04-05 | 1996-04-04 | A saw axle and a saw blade which can be fitted onto the axle |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU5294296A (en) |
| CA (1) | CA2216922C (en) |
| DE (1) | DE19681336T1 (en) |
| FI (1) | FI973874A (en) |
| SE (1) | SE506537C2 (en) |
| WO (1) | WO1996031310A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901629A (en) * | 1996-07-12 | 1999-05-11 | Precision Arbour Systems, Inc. | Saw arbor and guided circular saw |
| US6230600B1 (en) | 1996-07-12 | 2001-05-15 | Precision Arbor Systems, Inc. | Saw arbor and guided circular saw |
| USD417598S (en) | 1999-02-24 | 1999-12-14 | Black & Decker Inc. | Rotatable cutting tool |
| USD424076S (en) | 1999-02-24 | 2000-05-02 | Black & Decker Inc. | Mounting device for a cutting tool |
| PL1857237T3 (en) | 2006-05-15 | 2009-09-30 | Homag Holzbearbeitungssysteme Ag | Sawing device for moving workpieces |
| CH703182A1 (en) | 2010-05-26 | 2011-11-30 | Berner Fachhochschule Biel Architektur Holz Und Bau | Means for centering of circular saw blades and similar tools on the shaft. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3516460A (en) * | 1968-03-27 | 1970-06-23 | Masonite Corp | Mounting for guided circular saws |
| US5303688A (en) * | 1992-04-03 | 1994-04-19 | Chiuminatta Edward R | Mounting arbor for saw cutting blades |
-
1995
- 1995-04-05 SE SE9501261A patent/SE506537C2/en not_active IP Right Cessation
-
1996
- 1996-04-04 CA CA002216922A patent/CA2216922C/en not_active Expired - Fee Related
- 1996-04-04 AU AU52942/96A patent/AU5294296A/en not_active Abandoned
- 1996-04-04 DE DE19681336T patent/DE19681336T1/en not_active Withdrawn
- 1996-04-04 WO PCT/SE1996/000447 patent/WO1996031310A1/en active Application Filing
-
1997
- 1997-10-03 FI FI973874A patent/FI973874A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE9501261L (en) | 1996-10-06 |
| SE506537C2 (en) | 1998-01-12 |
| SE9501261D0 (en) | 1995-04-05 |
| AU5294296A (en) | 1996-10-23 |
| WO1996031310A1 (en) | 1996-10-10 |
| CA2216922A1 (en) | 1996-10-10 |
| DE19681336T1 (en) | 1998-05-07 |
| FI973874A0 (en) | 1997-10-03 |
| FI973874A (en) | 1997-10-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |