CA1127015A - Marine propeller and propeller shaft assembly - Google Patents
Marine propeller and propeller shaft assemblyInfo
- Publication number
- CA1127015A CA1127015A CA320,628A CA320628A CA1127015A CA 1127015 A CA1127015 A CA 1127015A CA 320628 A CA320628 A CA 320628A CA 1127015 A CA1127015 A CA 1127015A
- Authority
- CA
- Canada
- Prior art keywords
- propeller
- propeller shaft
- diameter portion
- hub
- mounting assembly
- 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.)
- Expired
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A marine propeller and propeller shaft assembly which includes a propeller having a hub with an internally flanged portion and a propeller shaft formed with an increased diameter portion, a reduced diameter portion and a threaded portion, which portions are contiguously disposed in the order mentioned toward a forward end of the propeller shaft, the internally flanged portion being rigidly secured to the increased diameter portion with a mechanical member, and a fastener nut member engageable with the threaded portion of the propeller shaft and adapted, when the propeller has been mounted in position on the propeller shaft, to be disposed substantially within the propeller hub. In a modified assembly, a sleeve is interposed between a circum-ferential wall of the reduced diameter portion of the propeller shaft and an internal circumferential wall of the internally flanged portion of the propeller hub.
A marine propeller and propeller shaft assembly which includes a propeller having a hub with an internally flanged portion and a propeller shaft formed with an increased diameter portion, a reduced diameter portion and a threaded portion, which portions are contiguously disposed in the order mentioned toward a forward end of the propeller shaft, the internally flanged portion being rigidly secured to the increased diameter portion with a mechanical member, and a fastener nut member engageable with the threaded portion of the propeller shaft and adapted, when the propeller has been mounted in position on the propeller shaft, to be disposed substantially within the propeller hub. In a modified assembly, a sleeve is interposed between a circum-ferential wall of the reduced diameter portion of the propeller shaft and an internal circumferential wall of the internally flanged portion of the propeller hub.
Description
. .
Field o.E the Invention This invention rela~es to a novel arrangemen-t for mounting a marine propeller on a propeller shaft, particular~y in a large-sized propulsion device~
BRIEF DESCRIPTION OF ~HE DRAWINGS
Various objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understocd from the following detailed description when considered in connection with the accompanying drawings, wherein like reference characters designate like or corresponding parts throughou~ the several views, and wherein:
FIGURE 1 is a schematic view showing a known taper-fitting arrangemen-t for mounting a propeller on a propeller shaft in torque and thrust transmitting connection therewith;
FIGURE 2 is a schematic view showing a known flange-coupling arrangement for mounting a propeller on a propeller shaft in a similar relationship to that shown in FIGURE l; and FIGURE 3(A) and FIGURE 3tB) each show a longitudinal sectional view of an embodiment of the propeller-mounting arrangement according to this invention (Figure 3(A) appears on the same page as Figure 1~; and FIGURE 4 is a perspective view showing an example o~
the sleeve employed in the embodiment illustrated in FIGURE 3(B).
Brief Description of the Prior Art Prior art arrangements for mounting marine propellers include taper-fitting arrangements and, in the case of a CPP
(Constant Pitch Prop.) and others, flange-coupling arrangements, although taper-fitting arrangements are the most cvmmon. -In 1 a typical taper-~it-tin~ arrangement as illustrated in Fig. 1, a tapered portlon la of a propeller shaft 1 is directly fi-tted to an interna~ly tapered portion oE a propeller hub 2 and the -two members are secured in a Eixed relative position ~ith locknuts 3 threadedly enga~eable wi-th the forward end of propeller shaft 1. Reference numeral 4 denotes a bonnet. Such taper~fitting arrangemen-ts, with or without keys, for the transmission of torque are insecure under certain conditions involving sharp tempera-ture variations. Thus, whereas propellers are generally made of copper alloys, propeller shafts are made oE steel, with the result that as the temperature increases, the fitting between the propeller and propeller shaft tends to become gradually loosened to the extent commensurate with the difference between the coefficients of expansion of the two materials, while at low temperatures, the flanged portion 2 of the propeller is sometimes subject to excess stress.
In the flange-coupling arrangement employed in a CPP
and others, as typically illustrated in ~ig. 2, the forward end of a propeller shaft 11 is formed with a flange portion ~la and a reduced-diameter portion llb and the propeller is secured to the rear end face of a propeller hub 12 with the aid of lockbolts 14 and dowel pins 15, for instance. ~eference numeral 13 denotes a bonnet and 16 denotes a flange cover. In this arrangement, the bolts 14 and dowel pins 15 which are to connect the propeller with the propeller hub must be fitted and set in position within a limited space as illustratea and, therefore, cannot have adequate dimensions. Consequently, when, for instance r an excess external force acts upon the propeller,-the force can hardly be evenly borne by several bolts and, in extreme cases, the bolts are destroyed one after another, thus jeopardizing safety of 1 operation. Especially when such an arrangement is adopted for the propeller of an iceboat which is subject to rugged operating conditions and rigorous environments, these drawbacks presen-t serious safety problems.
SUMM~RY OF THE INVENrr~ON
The object of this invention is to overcome the above-mentioned disadvantages of the prior art propeller-mountiny arrangements. The above object is accomplished by this invention which is generally dir~cted to a propeller and propeller shaft assembly for a marine propulsion device which includes a propeller having a hub with an internall~ flanged portion and a propeller shaft formed with an increased-diameter portion, a reduced-diameter por~ion and a threaded portion, such three portions being continuously disposed in the order mentioned toward a forward end of -the propeller shaft with the internall~ flanged portion being rigidly secured to the increased-diameter portion with a mechanical member, and a fastener nut member engageable with the threaded portion of the propeller shaft and adapted, when the propeller has been moun~ed in position on the propeller shaft, to be disposed sub.stantially within the propeller hub.
In a second aspect, this invention is directed to a propeller ancl propeller shaft assembly as generally described above, whèrein a sleeve is interposed between a circumferential wall of the reauced-diameter portion of the propeller shaft and an inner circumferential wall of the reduced-diameter portion of the propeller shaft and an inner circumferential wall of the flanged portion of the hub, the sleeve having an axially tapered inner or outer surface and defining a slit between ends thereof, such slit extending throughout the length of the sleeve. ~his sleeve is provided for easy alignment of the propeller hub with the propeller shaft~
~Z7;~
1 In another aspect, this invention is di.rected to a propeller and propeller shaft assembly as descxibed hereinbefore, wherein the Eorward end of the threaded portion of propeller shaft is rigidly secured to the nut with ~ locking member.
In still another aspectl this invention is d~rec-ted to a propeller and propeller shaft assembly as yenerally and specificall~ described above, wherein the nut is provided with a nut-loading ring.
In a further aspect, this invention is directed to a propeller and propeller shaft assembly as set forth hereinbefore, wherein the nut is provided with a loading ring for the sleeve.
In accordance with this invention, the ~langed portion of the propeller hub and the increased-diameter portion of the propeller shaft are disposed in abutting relation and the reduced-diameter portion of the shaft engages the internally flanged portion of the hub, with dowel pins or other mechanical fastener members being provided to set the increased-diameter portion of the propeller shaft and the flanged portion of the hub in a fixed relative portion. This built-up type construction provides a firmer fitting of the propeller hub with the propeller shaft within a reduced space. Furthermore, since the fas-te~ing nut is mounted on the threaded ~ortion of the propeller shaft, the local concentration of stress in the direction of thrust is effectively absorbed. The provision for the sleeve and the load- -in~ means therefore makes for easy alignment and installation of the propeller hub with respect to the propeller shaft.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the accompanying ~rawings, FIGURE 3(A) shows an embodiment of this invention where a sleeve to be described hereinafter is not present between the circumferential B
.~IZ7~S
1 wall of a reduced-diameter portion of a propeller shaft and an inner circumEerential wall of a propeller hub, while FIGURE 3(B) is another embodiment where such a sleeve is interposed, an example oE such sleeve being shown in FIGU~E 4.
In the embodiment illus-trated in FIGURE 3(A), a propeller shaft 31 is formed at its forward end with an increased-dia~eter por-tion 31a and, in contiguity therewith, a reduced-diameter portion 31b which, in turn, is contiguous with a threaded portion 31c which is most forwardly located. The diameters of 1~ the reduced-diameter portion 31b and threaded portion 31c are both less than the diameter of the propeller shaft 31. On the other hand, a propeller hub 32 is internally formed with a flange 32a complementary to said increased-diameter portion 31a, the internal flange 32a defining a central opening 32b adapted to accept the reduced-diameter portion 31b in such a manner that, as the reduced-diameter portion 31b is increased into the central opening 32b, the increased-diameter portion 31a abuts a rear wall o the internal flange 32a of propeller hub 32 and the threaded portion 31c of propeller shaft 31 extends forwardly beyond a forward face of flange 32a.
In the above-noted arrangement, a plurality of dowel pins 33 are driven through the increased-diameter ~ortion 31a into said flange 32a so as to connect the propeller with the propeller shaft in a torque transmitting relationship. The effective transmission of forward and backward thrust is ensured by means of a nut 34 which is threadedly engageable with the threaded portion 31c extending forwardly beyond the central opening 32b.
Thus assembled, the nut 34 is disposed substantially within the propeller hub 32 and abuts the forward wall of the Elange 32a of 3~ hub 32. Furthermore, a loading ring 34a is installed adjacent a 7~
1 leading face of the nut 34 which abuts the flange 32a so that, as the ring 34a is subjected to a hydraulic pressure, the increased-diameter portion 31a and flange 32a are forced ayainst each other to provide a firm fit-ting therebe-tween. In addition, a ~orward extension of the threaded por-tion 31c of propeller shaft 31 and the nut 34 are secured in fixed relative position with a locking member 35. In this embodiment, because the torque transmitting function and the thrus-t transmitting function are respectively discharged by independent parts, the maximum strength-wise safety is ensured while the limited available space is best utilized.
~ The embodiment illustrated in FIGURE 3(B~ includes a device permitting easy ali.gnment of the propeller hub 32 with the propeller shaft 31 in addition to the construction described hereinbefore with reference to FIGURE 3 (~) . Thus, in the arrange-ment described, the increased-diameter portion 31a and the reduced-diameter portion 31b of propeller shaft 31 would tend to compete with respect to the complementaxy internal surfaces of the propeller hub 32. This competition of deterence to alignment is avoided in this particular embodimen-t illustrated in FIGURE 3(B). Thus, there is provided a clearance 31d between a circumferential wall of the increased-diameter portion 31a of propeller shaft 31 and the corresponding inner circumferential wall of the propeller hub 32 as well as a sleeve 38 havi~g a longitudinally tapered inner or outer surface 38a (the inner surface being tapered in the drawing) and a slit 38b extending throu~hout its length being subsequently interposed between the inner circumferential wall of the flanged portion 32a of propeller hub 32 and the circumferential wall of the reduced-diameter portion 31b of propeller shaft 31 which is complementally _~;_ s 1 tapered. The sl~eve is hydraulically forced into the clearance~et~een the flange 32a and the reduced-diameter portion 31b by means of a loading ring 34b, which is also installed in the nu-t 34 but which is independent of the loading riny 34a mentioned hereinabove. This arrangement permits an easy alignment and fitting of the propeller hub 32 with the propeller shaft 31 without any undue friction therebetween, and is particularl~
beneficial in the mounting of a large-sized propeller. The other parts of this construction are similar to the corresponding parts Of the construction hereinbefore described with reference to FIGURE 3(A) and, therefore, will not be described. It will be a~parent that the above-described fitting structure of this invention is considerably superior to the prior art taper fitting arrangement and, also, to the prior art flange-coupling arran~e-ment.
Thus, because the propeller hub 32 is for~ed with the flange 32a, the propeller shaft 31 is formed with the increased-diameter portion 31a, and a reduced-diameter portion 31b and a threaded portion 31c are disposed in a contiguous stepwise
Field o.E the Invention This invention rela~es to a novel arrangemen-t for mounting a marine propeller on a propeller shaft, particular~y in a large-sized propulsion device~
BRIEF DESCRIPTION OF ~HE DRAWINGS
Various objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understocd from the following detailed description when considered in connection with the accompanying drawings, wherein like reference characters designate like or corresponding parts throughou~ the several views, and wherein:
FIGURE 1 is a schematic view showing a known taper-fitting arrangemen-t for mounting a propeller on a propeller shaft in torque and thrust transmitting connection therewith;
FIGURE 2 is a schematic view showing a known flange-coupling arrangement for mounting a propeller on a propeller shaft in a similar relationship to that shown in FIGURE l; and FIGURE 3(A) and FIGURE 3tB) each show a longitudinal sectional view of an embodiment of the propeller-mounting arrangement according to this invention (Figure 3(A) appears on the same page as Figure 1~; and FIGURE 4 is a perspective view showing an example o~
the sleeve employed in the embodiment illustrated in FIGURE 3(B).
Brief Description of the Prior Art Prior art arrangements for mounting marine propellers include taper-fitting arrangements and, in the case of a CPP
(Constant Pitch Prop.) and others, flange-coupling arrangements, although taper-fitting arrangements are the most cvmmon. -In 1 a typical taper-~it-tin~ arrangement as illustrated in Fig. 1, a tapered portlon la of a propeller shaft 1 is directly fi-tted to an interna~ly tapered portion oE a propeller hub 2 and the -two members are secured in a Eixed relative position ~ith locknuts 3 threadedly enga~eable wi-th the forward end of propeller shaft 1. Reference numeral 4 denotes a bonnet. Such taper~fitting arrangemen-ts, with or without keys, for the transmission of torque are insecure under certain conditions involving sharp tempera-ture variations. Thus, whereas propellers are generally made of copper alloys, propeller shafts are made oE steel, with the result that as the temperature increases, the fitting between the propeller and propeller shaft tends to become gradually loosened to the extent commensurate with the difference between the coefficients of expansion of the two materials, while at low temperatures, the flanged portion 2 of the propeller is sometimes subject to excess stress.
In the flange-coupling arrangement employed in a CPP
and others, as typically illustrated in ~ig. 2, the forward end of a propeller shaft 11 is formed with a flange portion ~la and a reduced-diameter portion llb and the propeller is secured to the rear end face of a propeller hub 12 with the aid of lockbolts 14 and dowel pins 15, for instance. ~eference numeral 13 denotes a bonnet and 16 denotes a flange cover. In this arrangement, the bolts 14 and dowel pins 15 which are to connect the propeller with the propeller hub must be fitted and set in position within a limited space as illustratea and, therefore, cannot have adequate dimensions. Consequently, when, for instance r an excess external force acts upon the propeller,-the force can hardly be evenly borne by several bolts and, in extreme cases, the bolts are destroyed one after another, thus jeopardizing safety of 1 operation. Especially when such an arrangement is adopted for the propeller of an iceboat which is subject to rugged operating conditions and rigorous environments, these drawbacks presen-t serious safety problems.
SUMM~RY OF THE INVENrr~ON
The object of this invention is to overcome the above-mentioned disadvantages of the prior art propeller-mountiny arrangements. The above object is accomplished by this invention which is generally dir~cted to a propeller and propeller shaft assembly for a marine propulsion device which includes a propeller having a hub with an internall~ flanged portion and a propeller shaft formed with an increased-diameter portion, a reduced-diameter por~ion and a threaded portion, such three portions being continuously disposed in the order mentioned toward a forward end of -the propeller shaft with the internall~ flanged portion being rigidly secured to the increased-diameter portion with a mechanical member, and a fastener nut member engageable with the threaded portion of the propeller shaft and adapted, when the propeller has been moun~ed in position on the propeller shaft, to be disposed sub.stantially within the propeller hub.
In a second aspect, this invention is directed to a propeller ancl propeller shaft assembly as generally described above, whèrein a sleeve is interposed between a circumferential wall of the reauced-diameter portion of the propeller shaft and an inner circumferential wall of the reduced-diameter portion of the propeller shaft and an inner circumferential wall of the flanged portion of the hub, the sleeve having an axially tapered inner or outer surface and defining a slit between ends thereof, such slit extending throughout the length of the sleeve. ~his sleeve is provided for easy alignment of the propeller hub with the propeller shaft~
~Z7;~
1 In another aspect, this invention is di.rected to a propeller and propeller shaft assembly as descxibed hereinbefore, wherein the Eorward end of the threaded portion of propeller shaft is rigidly secured to the nut with ~ locking member.
In still another aspectl this invention is d~rec-ted to a propeller and propeller shaft assembly as yenerally and specificall~ described above, wherein the nut is provided with a nut-loading ring.
In a further aspect, this invention is directed to a propeller and propeller shaft assembly as set forth hereinbefore, wherein the nut is provided with a loading ring for the sleeve.
In accordance with this invention, the ~langed portion of the propeller hub and the increased-diameter portion of the propeller shaft are disposed in abutting relation and the reduced-diameter portion of the shaft engages the internally flanged portion of the hub, with dowel pins or other mechanical fastener members being provided to set the increased-diameter portion of the propeller shaft and the flanged portion of the hub in a fixed relative portion. This built-up type construction provides a firmer fitting of the propeller hub with the propeller shaft within a reduced space. Furthermore, since the fas-te~ing nut is mounted on the threaded ~ortion of the propeller shaft, the local concentration of stress in the direction of thrust is effectively absorbed. The provision for the sleeve and the load- -in~ means therefore makes for easy alignment and installation of the propeller hub with respect to the propeller shaft.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the accompanying ~rawings, FIGURE 3(A) shows an embodiment of this invention where a sleeve to be described hereinafter is not present between the circumferential B
.~IZ7~S
1 wall of a reduced-diameter portion of a propeller shaft and an inner circumEerential wall of a propeller hub, while FIGURE 3(B) is another embodiment where such a sleeve is interposed, an example oE such sleeve being shown in FIGU~E 4.
In the embodiment illus-trated in FIGURE 3(A), a propeller shaft 31 is formed at its forward end with an increased-dia~eter por-tion 31a and, in contiguity therewith, a reduced-diameter portion 31b which, in turn, is contiguous with a threaded portion 31c which is most forwardly located. The diameters of 1~ the reduced-diameter portion 31b and threaded portion 31c are both less than the diameter of the propeller shaft 31. On the other hand, a propeller hub 32 is internally formed with a flange 32a complementary to said increased-diameter portion 31a, the internal flange 32a defining a central opening 32b adapted to accept the reduced-diameter portion 31b in such a manner that, as the reduced-diameter portion 31b is increased into the central opening 32b, the increased-diameter portion 31a abuts a rear wall o the internal flange 32a of propeller hub 32 and the threaded portion 31c of propeller shaft 31 extends forwardly beyond a forward face of flange 32a.
In the above-noted arrangement, a plurality of dowel pins 33 are driven through the increased-diameter ~ortion 31a into said flange 32a so as to connect the propeller with the propeller shaft in a torque transmitting relationship. The effective transmission of forward and backward thrust is ensured by means of a nut 34 which is threadedly engageable with the threaded portion 31c extending forwardly beyond the central opening 32b.
Thus assembled, the nut 34 is disposed substantially within the propeller hub 32 and abuts the forward wall of the Elange 32a of 3~ hub 32. Furthermore, a loading ring 34a is installed adjacent a 7~
1 leading face of the nut 34 which abuts the flange 32a so that, as the ring 34a is subjected to a hydraulic pressure, the increased-diameter portion 31a and flange 32a are forced ayainst each other to provide a firm fit-ting therebe-tween. In addition, a ~orward extension of the threaded por-tion 31c of propeller shaft 31 and the nut 34 are secured in fixed relative position with a locking member 35. In this embodiment, because the torque transmitting function and the thrus-t transmitting function are respectively discharged by independent parts, the maximum strength-wise safety is ensured while the limited available space is best utilized.
~ The embodiment illustrated in FIGURE 3(B~ includes a device permitting easy ali.gnment of the propeller hub 32 with the propeller shaft 31 in addition to the construction described hereinbefore with reference to FIGURE 3 (~) . Thus, in the arrange-ment described, the increased-diameter portion 31a and the reduced-diameter portion 31b of propeller shaft 31 would tend to compete with respect to the complementaxy internal surfaces of the propeller hub 32. This competition of deterence to alignment is avoided in this particular embodimen-t illustrated in FIGURE 3(B). Thus, there is provided a clearance 31d between a circumferential wall of the increased-diameter portion 31a of propeller shaft 31 and the corresponding inner circumferential wall of the propeller hub 32 as well as a sleeve 38 havi~g a longitudinally tapered inner or outer surface 38a (the inner surface being tapered in the drawing) and a slit 38b extending throu~hout its length being subsequently interposed between the inner circumferential wall of the flanged portion 32a of propeller hub 32 and the circumferential wall of the reduced-diameter portion 31b of propeller shaft 31 which is complementally _~;_ s 1 tapered. The sl~eve is hydraulically forced into the clearance~et~een the flange 32a and the reduced-diameter portion 31b by means of a loading ring 34b, which is also installed in the nu-t 34 but which is independent of the loading riny 34a mentioned hereinabove. This arrangement permits an easy alignment and fitting of the propeller hub 32 with the propeller shaft 31 without any undue friction therebetween, and is particularl~
beneficial in the mounting of a large-sized propeller. The other parts of this construction are similar to the corresponding parts Of the construction hereinbefore described with reference to FIGURE 3(A) and, therefore, will not be described. It will be a~parent that the above-described fitting structure of this invention is considerably superior to the prior art taper fitting arrangement and, also, to the prior art flange-coupling arran~e-ment.
Thus, because the propeller hub 32 is for~ed with the flange 32a, the propeller shaft 31 is formed with the increased-diameter portion 31a, and a reduced-diameter portion 31b and a threaded portion 31c are disposed in a contiguous stepwise
2~ arrangement, with the increased-diameter portion 31a and the flange 32a being abutted against each other to provide a built-up connection, a very firm coupling is easily accomplished within the l-imited axial dimension of the propeller hub 32, with assurance of a positive torque transmission. Furthermore, because the fastening nut 34 is threaded onto the propeller shaft, also as substantially built into the axial dimension of the propeller hub 32, the local stress concentration in the direction of thrust is effectively absorbed. The use of the loading ring 34 in combination with this arrangement ensures an extremely firm connection between the increased-diameter portion 31a of propeller .
shaft and the flange 32a of propeller hub, ~hich does no-t yield -to external forces. The provision for a locking mem~er 35 securing the EaStening nut 34 to the forward end of the propeller shaft 31 ensures a positive, firm and safe coùpling.
The use of the sleeve 38 makes for an easy and accurate alignment of the propeller hub 32 with the propeller shaf-t 32, thus facilitating the propeller mounting operation. While the above-mentioned advantages of the propeller mountin~ structure of this invention may be fully exploited in the installation of all types of propellers, these unique and novel features are best utilized in applications subject to rugged operating conditions or sharp temperature changes as in the case of iceboats.
It should be understood that the foregoin~ description is merely illustrative of this invention and that many changes and modifications may be easily made by those skilled in the art without departing from the spirit and scope of this invention as set forth in the appended claims.
shaft and the flange 32a of propeller hub, ~hich does no-t yield -to external forces. The provision for a locking mem~er 35 securing the EaStening nut 34 to the forward end of the propeller shaft 31 ensures a positive, firm and safe coùpling.
The use of the sleeve 38 makes for an easy and accurate alignment of the propeller hub 32 with the propeller shaf-t 32, thus facilitating the propeller mounting operation. While the above-mentioned advantages of the propeller mountin~ structure of this invention may be fully exploited in the installation of all types of propellers, these unique and novel features are best utilized in applications subject to rugged operating conditions or sharp temperature changes as in the case of iceboats.
It should be understood that the foregoin~ description is merely illustrative of this invention and that many changes and modifications may be easily made by those skilled in the art without departing from the spirit and scope of this invention as set forth in the appended claims.
Claims (8)
1. A propeller and propeller shaft mounting assembly for a marine propulsion device comprising:
a propeller hub which includes a first flanged portion disposed internally therein;
a propeller shaft which includes a second flanged portion, a reduced diameter portion, and a threaded portion; said first, second and third portions being contiguously disposed in the order listed along the forward end of said propeller shaft;
fastener means for joining said first flanged portion to said second flanged portion; and fastener nut means engageable with said threaded portion of said propeller shaft for securing said propeller hub to said propeller shaft.
a propeller hub which includes a first flanged portion disposed internally therein;
a propeller shaft which includes a second flanged portion, a reduced diameter portion, and a threaded portion; said first, second and third portions being contiguously disposed in the order listed along the forward end of said propeller shaft;
fastener means for joining said first flanged portion to said second flanged portion; and fastener nut means engageable with said threaded portion of said propeller shaft for securing said propeller hub to said propeller shaft.
2. The propeller and propeller shaft mounting assembly as set forth in Claim 1 further comprising:
a sleeve member interposed between an external circum-ferential wall of said reduced diameter portion of said propeller shaft and an internal circumferential wall of said first flanged portion.
a sleeve member interposed between an external circum-ferential wall of said reduced diameter portion of said propeller shaft and an internal circumferential wall of said first flanged portion.
3. The propeller and propeller shaft mounting assembly as set forth in Claim 1 or Claim 2 wherein said fastener nut means is disposed substantially within said propeller hub.
4. The propeller and propeller shaft mounting assembly as set forth in Claim 1 or Claim 2 further comprising:
means for locking said fastener nut means to said propeller shaft.
means for locking said fastener nut means to said propeller shaft.
The propeller and propeller shaft mounting assembly as set forth in Claim 1 or Claim 2 further comprising:
a first loading ring disposed within said fastener nut means, said first loading ring acting to force said first flanged portion against said second flanged portion.
a first loading ring disposed within said fastener nut means, said first loading ring acting to force said first flanged portion against said second flanged portion.
6. The propeller and propeller shaft mounting assembly as set forth in Claim 2 further comprising:
a second loading ring disposed within said fastener nut means, said second loading ring acting to force said sleeve means into positon between said external circumferential wall and said internal circumferential wall.
a second loading ring disposed within said fastener nut means, said second loading ring acting to force said sleeve means into positon between said external circumferential wall and said internal circumferential wall.
7. The propeller and propeller shaft mounting assembly as set forth in Claim 2 wherein said external circumferential wall of said reduced diameter portion of said propeller shaft is axially tapered and wherein the inner wall of said sleeve is tapered in complementary relation with the taper of said external circumferential wall.
8. The propeller and propeller shaft mounting assembly as set forth in Claim 2 wherein said internal circumferential wall of said first flanged portion is axially tapered and wherein the outer wall of said sleeve is tapered in complementary relation with the taper of said internal circumferential wall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10813/78 | 1978-01-31 | ||
| JP53010813A JPS5951477B2 (en) | 1978-01-31 | 1978-01-31 | Marine propeller mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1127015A true CA1127015A (en) | 1982-07-06 |
Family
ID=11760778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA320,628A Expired CA1127015A (en) | 1978-01-31 | 1979-01-31 | Marine propeller and propeller shaft assembly |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5951477B2 (en) |
| CA (1) | CA1127015A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1115457A (en) * | 1965-11-08 | 1968-05-29 | P & O Res & Dev Co | Improvements in propeller fastening |
| JPS4827490A (en) * | 1971-08-11 | 1973-04-11 |
-
1978
- 1978-01-31 JP JP53010813A patent/JPS5951477B2/en not_active Expired
-
1979
- 1979-01-31 CA CA320,628A patent/CA1127015A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54104197A (en) | 1979-08-16 |
| JPS5951477B2 (en) | 1984-12-14 |
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