CA1217390A - Shock absorbing propeller - Google Patents
Shock absorbing propellerInfo
- Publication number
- CA1217390A CA1217390A CA000463511A CA463511A CA1217390A CA 1217390 A CA1217390 A CA 1217390A CA 000463511 A CA000463511 A CA 000463511A CA 463511 A CA463511 A CA 463511A CA 1217390 A CA1217390 A CA 1217390A
- Authority
- CA
- Canada
- Prior art keywords
- propeller
- sleeve member
- channels
- hub
- mounting arrangement
- 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
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/34—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/64—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic elements arranged between substantially-radial walls of both coupling parts
- F16D3/68—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic elements arranged between substantially-radial walls of both coupling parts the elements being made of rubber or similar material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D2001/062—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end characterised by adaptors where hub bores being larger than the shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Dampers (AREA)
- Motor Power Transmission Devices (AREA)
- Vibration Prevention Devices (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Exhaust Silencers (AREA)
Abstract
SHOCK ABSORBING PROPELLER
ABSTRACT
A marine propeller mounting arrangement includes a sleeve member for mounting on a propeller shaft, a propeller having an inner hub which fits over the sleeve member and a cushion member fitting between the sleeve member and the propeller inner hub. The sleeve member includes radially extending projections registering with channels in the hub to positively drive the propeller, even in the event of failure of the cushion member. The propeller has an outer hub surrounding the inner hub to define an exhaust gas passageway through the propeller.
ABSTRACT
A marine propeller mounting arrangement includes a sleeve member for mounting on a propeller shaft, a propeller having an inner hub which fits over the sleeve member and a cushion member fitting between the sleeve member and the propeller inner hub. The sleeve member includes radially extending projections registering with channels in the hub to positively drive the propeller, even in the event of failure of the cushion member. The propeller has an outer hub surrounding the inner hub to define an exhaust gas passageway through the propeller.
Description
Shock Absorbing Propeller Technical Field This invention relates to arrangments for mounting a propeller on a propeller shaft of a marhne propulsion device and particularly to su~h an arrangement having a shock ab-sorbing structure.
Backqround Art Marine propeller mounting arrangements are known which use resilient hubs to protect the propeller and propeller drive train from the shock which can result from impact between the propeller and submerged obstacles or from shifting gears.
Among themt U.S. Patent No. 3,045,763 to Perrott, issued July 24, 1962, discloses a shock absorbing drive means for use on a propeller which is also protected by a shear pin. The Perrott device utilizes ribs on a drive sleeve engaging . corresponding grooves in the hub of a propeller to drive the propeller. The ribs are each covered with rubber to provide some shock absorbtion.
Disclosure of Invention In one broad aspect, the invention pertains to a propeller mounting arrangement which includes a sleeve member having just two radially outwardly extending projections positioned axially along the sleeve member and having an inner bore for drivingly engaging a propeller shaft, and a propeller having an outer hub, an inner hub, and a plurality of vanes connecting the inner hub with the outer hub to form an exhaust gas passageway between the inner and outer hubs. The inner hub has a central bore therethrough and just two channels in the wall of the central bore extending radially outward between the ~12~7390 -la-vanes with the projections on the sleeve extending radially outward beyond the central bore into the channels to loosely register with the channels. A cushion member encircles the sleeve, the cushion member fitting in telescoping relationship between the sleeve member and the propeller inner hub, and the cushion member engaging the walls of the channels and projections.
More particularly the invention as disclosed provides a propeller mounting arrangement including a sleeve member for mounting on a propeller shaft, a propeller having a hub which fits over the sleeve member, and a cushion member fitting between the sleeve member and the propeller hub and encircling the sleeve member. The sleeve member in-cludes radially outwardly extending projections positioned axially along the sleeve member and loosely registering with corresponding chnnels in the inner hub of the propeller.
The propeller has an outer hub surrounding the inner hub to define an exhaust gas passageway with a plurality of . vanes supporting the outer hub on the inner hub. The channels in the inner hub have walls defined by the vanes.
The cushion member engages the walls of both the projections from the sleeve member and the walls of the channels and includes void spaces 7;~
between the walls to increase the cushioning effect between the projections and walls of the channels.
The void spaces in the cushion member preferably are aligned with the axis of the sleeve member and are formed on the surface of 5 of the member to facilitate manufacture.
By providing the cushion member with thicker walls on one side of the sleeve member to provide the greatest cushioning effect when the prope~ler is driven in the forward direction, the space required by the cushioning system can be reduced. Limiting the number of 10 propeller driving ridges to two also tends to increase the space available for cushioning against impacts while maintaining the required area for the exhaust gas passageway.
Description of the Drawings Figure 1 is an exploded view of a shock absorbing propeller 15 assembly incorporating the invention.
Figure 2 is a longitudinal partial sectional view of the propeller assembly of Figure 1.
Figure 3 is a sectional view of the propeller of Figure 1.
Figure 4 is an end view of an alternate embodiment of the cush-20 ion member suitable for use in the assembly of Claim 1.
Figure 5 is an end view of a second alternate embodiment of thecushion member.
Best Modes For Carrying Out The Invention As shown in the drawings a marine propeller 10 is supported on 25 the propeller shaft 11 of an outboard propulsion unit 12. ` The - outboard propulsion unit 12, such as typically found on an outboard motor or stern drive, includes an exhaust gas passageway 13 for directing engine exhaust aft to be discharged through the hub of the propeller 10.
The propeller 10 is supported on the splined propeller shaft 11 by a sleeve member 14 having female splines 15 mating with those of the propeller shaft 11. A cushion member 16 fits in telescoping relationship between the sleeve men~ber 14 and the propeller inner hub 17 to provide a shock absorbing cushion bètween the propellcr lO
and the propeller. shaft 11. .A. for.ward thrust,.hub 18 ,is provided to carry the forward thrust from the propeller 10 to the propeller shaft 11 and assist in centering the forward portion of the propeller relative to the shaft 11. An-aft, splined washer. l9 has f~male splines 5 20 engaging the propeller shaft splines and a shoulder 21 which assists in centering the ,aft portion of the propeller 10. The . entire assembly is retained on the propeller shaft 11 by a nut 22 engaging the thread~,.23-at lthe .end Qf..the propelle,r~ shaft 11,, with the nut, 22 locked against rotation by a tab washer ~24 having tabs whiçh . engage lO the splined,washer 19 in a conventional manner.( . .
The sleeve member 14 has internal splines 15 engaging the splinés on the propeller shaft 11 and abuts against the thrust hub 18 which in turn abuts against a shoulder 25 on the propeller shaft.11.
The sleeve member 14 is formed of metal and includes two l 5 diametrically opposed ~i,ages 26 extending radially outward to trar~smi,t torque.-. 'rhe ridges 2~ are smoothly faired into the body of the sleeve member :14.:to avoid stress concentrations. The sleeve member ~ ~ has a ,2 taper from its forward end aft to facilitate both casting and ass,embly. At the aft end of the sleeve member 14 an annular 20 projection 27 is provided to support the propeller 10.
~ . The propeller 10 includes an inner hub 17 and an outer hub 28 with the outer hub 28 supported on the inner hub- 17 by ,vanes 29.
A propeller 10 having three blades 30 on the outer hub 28 is shown though any suitable number of blades could be used. The inner hub 25 17 is provided with two deep Ghannels 31 extending radially outward and having walls aeIïnea ~y the vanes ~9 to accommodate the ridges 26 on the sleeve member .14 and . the cushion member 16. Both the inner bore 32 of the inner hub 17 and the channels 31 have a 2 taper. At the forward end the inner diameter of the inner hub 17 is 30 sized - to mate with the thrust hub 18, with the reduced diumeter portion of the thrust hub 18 nesting closely inside the inner bore 32 to center the forward end of the propeller 10 on the propeller shaft 11. A.t the aft end of the propeller inner hub 17 the cup defined by the inner hub 17 and channels 31 is closed by a flange 33 e~ccept for 35 a central circular opening 34. The ~ircular opening 34 nests around the annular projection 27 at the aft end of the sieeve member and the ~17390 similar projection on the aft splined washer 19 to center the aft end of the propeller 10 on the propeller shaft 11. Thus the propeller 10 is held coaxial with the propeller shaft 11.
The cushion member 16 is formed of a shock absorbing 5 elastomer, natural rubber in the preferred embodiment, and fits between the tapered sleeve member I4 and the tapered inner bore 32 of the inner hub 17 of the propeller 10 to absorb shock between the sleeve member 14 and the propeller 10. The cushion member 16 may be in either a relaxed or slightly compressed state when the propeller lO 10 is held in place by the nut 22 and tab washer 24. To increase the cushioning effect provided by the cushion member 16, grooves 35 are formed in the cushion member 16 between the walls of the channels 31 and the ridges 26 on the sleeve member 14. The grooves 35 leave void spaces between the walls, thus allowing greater compression of l 5 the cushion member 16 when a shock loading is imposed on the cushion member 16, either by shifting gears or when the propeller 10 collides with an underwater object.
Several forms of the cushion member 16 are shown in Figures 3, 4, and 5, all formed of the same material. The embodiment shown in 20 Figure 3 positions the sleeve member 14 symmetrically in the propeller 10, ~hus providing equal cushioning against impacts from either direction while those shown in Figures 4 and 5 position the sleeve member ridges 26 to provide greater cushioning against impacts occuring when the propeller 10 is rotating in the clockwise direction, 25 as viewed in the figures. The cushion members 16 of Figure 4 and 5 thus allow the greatest shock absorbtion to be provided when the propeller 10 is rotating in a direction to drive it forward and will most frequently be operating at its highest speeds.
The grooves 35 in all of the cushion members 16 are formed on 30 the external surfaces of the members 16, thus allowing the members to be cast with relatively simple permanent die molds. While the grooves 3S are illustrated as axially aligned with the sleeve member 14, other orientations are possible and could even be formed as holes rather than grooves. Though the shape and orientation of the void 35 spaces in the cushion member 16 i~ not critical, the void sp~nces should be arranged to provide an initinl stiffness great enougll to ~Z17390 preven~ any substantial deformation. of the .cushion member 16 ~uring normal operation while allowing substantial deflection during shifting or upon impact.
In operation, the cushion member 16 is ~slightly compressed 5 between the walls of the channels 31 in the propeller 10 and the ridges 26 on the sleeve member 14 as the propeller 10 is driven by the propeller shaft 11. Because the cushion member 16 is loaded in compression. ~uring, ~normal ,operationj. ther,~ is. litt~e chance of ,its failing in operation. ~ Further even should .the cushion. member ,16, fail, l O the ridges 26 on the sleeve member 14 exten~. into the channels 31 and would continue to drive the propeller 10. Should the propeller 10 impact with an under water object, ~he voids in the cushion member 16 will allow some rotation of the propeller shaft 11 and sleeve member 14 relative to the propeller 10 to cushion the impact. The 15 ~voids in th.e cushion member 16 serye,to fur.the,r the cushion effect by increasing the. . relative rotation bet~een- the sleeve member 14 and the propeller 19 under impact loading.
Backqround Art Marine propeller mounting arrangements are known which use resilient hubs to protect the propeller and propeller drive train from the shock which can result from impact between the propeller and submerged obstacles or from shifting gears.
Among themt U.S. Patent No. 3,045,763 to Perrott, issued July 24, 1962, discloses a shock absorbing drive means for use on a propeller which is also protected by a shear pin. The Perrott device utilizes ribs on a drive sleeve engaging . corresponding grooves in the hub of a propeller to drive the propeller. The ribs are each covered with rubber to provide some shock absorbtion.
Disclosure of Invention In one broad aspect, the invention pertains to a propeller mounting arrangement which includes a sleeve member having just two radially outwardly extending projections positioned axially along the sleeve member and having an inner bore for drivingly engaging a propeller shaft, and a propeller having an outer hub, an inner hub, and a plurality of vanes connecting the inner hub with the outer hub to form an exhaust gas passageway between the inner and outer hubs. The inner hub has a central bore therethrough and just two channels in the wall of the central bore extending radially outward between the ~12~7390 -la-vanes with the projections on the sleeve extending radially outward beyond the central bore into the channels to loosely register with the channels. A cushion member encircles the sleeve, the cushion member fitting in telescoping relationship between the sleeve member and the propeller inner hub, and the cushion member engaging the walls of the channels and projections.
More particularly the invention as disclosed provides a propeller mounting arrangement including a sleeve member for mounting on a propeller shaft, a propeller having a hub which fits over the sleeve member, and a cushion member fitting between the sleeve member and the propeller hub and encircling the sleeve member. The sleeve member in-cludes radially outwardly extending projections positioned axially along the sleeve member and loosely registering with corresponding chnnels in the inner hub of the propeller.
The propeller has an outer hub surrounding the inner hub to define an exhaust gas passageway with a plurality of . vanes supporting the outer hub on the inner hub. The channels in the inner hub have walls defined by the vanes.
The cushion member engages the walls of both the projections from the sleeve member and the walls of the channels and includes void spaces 7;~
between the walls to increase the cushioning effect between the projections and walls of the channels.
The void spaces in the cushion member preferably are aligned with the axis of the sleeve member and are formed on the surface of 5 of the member to facilitate manufacture.
By providing the cushion member with thicker walls on one side of the sleeve member to provide the greatest cushioning effect when the prope~ler is driven in the forward direction, the space required by the cushioning system can be reduced. Limiting the number of 10 propeller driving ridges to two also tends to increase the space available for cushioning against impacts while maintaining the required area for the exhaust gas passageway.
Description of the Drawings Figure 1 is an exploded view of a shock absorbing propeller 15 assembly incorporating the invention.
Figure 2 is a longitudinal partial sectional view of the propeller assembly of Figure 1.
Figure 3 is a sectional view of the propeller of Figure 1.
Figure 4 is an end view of an alternate embodiment of the cush-20 ion member suitable for use in the assembly of Claim 1.
Figure 5 is an end view of a second alternate embodiment of thecushion member.
Best Modes For Carrying Out The Invention As shown in the drawings a marine propeller 10 is supported on 25 the propeller shaft 11 of an outboard propulsion unit 12. ` The - outboard propulsion unit 12, such as typically found on an outboard motor or stern drive, includes an exhaust gas passageway 13 for directing engine exhaust aft to be discharged through the hub of the propeller 10.
The propeller 10 is supported on the splined propeller shaft 11 by a sleeve member 14 having female splines 15 mating with those of the propeller shaft 11. A cushion member 16 fits in telescoping relationship between the sleeve men~ber 14 and the propeller inner hub 17 to provide a shock absorbing cushion bètween the propellcr lO
and the propeller. shaft 11. .A. for.ward thrust,.hub 18 ,is provided to carry the forward thrust from the propeller 10 to the propeller shaft 11 and assist in centering the forward portion of the propeller relative to the shaft 11. An-aft, splined washer. l9 has f~male splines 5 20 engaging the propeller shaft splines and a shoulder 21 which assists in centering the ,aft portion of the propeller 10. The . entire assembly is retained on the propeller shaft 11 by a nut 22 engaging the thread~,.23-at lthe .end Qf..the propelle,r~ shaft 11,, with the nut, 22 locked against rotation by a tab washer ~24 having tabs whiçh . engage lO the splined,washer 19 in a conventional manner.( . .
The sleeve member 14 has internal splines 15 engaging the splinés on the propeller shaft 11 and abuts against the thrust hub 18 which in turn abuts against a shoulder 25 on the propeller shaft.11.
The sleeve member 14 is formed of metal and includes two l 5 diametrically opposed ~i,ages 26 extending radially outward to trar~smi,t torque.-. 'rhe ridges 2~ are smoothly faired into the body of the sleeve member :14.:to avoid stress concentrations. The sleeve member ~ ~ has a ,2 taper from its forward end aft to facilitate both casting and ass,embly. At the aft end of the sleeve member 14 an annular 20 projection 27 is provided to support the propeller 10.
~ . The propeller 10 includes an inner hub 17 and an outer hub 28 with the outer hub 28 supported on the inner hub- 17 by ,vanes 29.
A propeller 10 having three blades 30 on the outer hub 28 is shown though any suitable number of blades could be used. The inner hub 25 17 is provided with two deep Ghannels 31 extending radially outward and having walls aeIïnea ~y the vanes ~9 to accommodate the ridges 26 on the sleeve member .14 and . the cushion member 16. Both the inner bore 32 of the inner hub 17 and the channels 31 have a 2 taper. At the forward end the inner diameter of the inner hub 17 is 30 sized - to mate with the thrust hub 18, with the reduced diumeter portion of the thrust hub 18 nesting closely inside the inner bore 32 to center the forward end of the propeller 10 on the propeller shaft 11. A.t the aft end of the propeller inner hub 17 the cup defined by the inner hub 17 and channels 31 is closed by a flange 33 e~ccept for 35 a central circular opening 34. The ~ircular opening 34 nests around the annular projection 27 at the aft end of the sieeve member and the ~17390 similar projection on the aft splined washer 19 to center the aft end of the propeller 10 on the propeller shaft 11. Thus the propeller 10 is held coaxial with the propeller shaft 11.
The cushion member 16 is formed of a shock absorbing 5 elastomer, natural rubber in the preferred embodiment, and fits between the tapered sleeve member I4 and the tapered inner bore 32 of the inner hub 17 of the propeller 10 to absorb shock between the sleeve member 14 and the propeller 10. The cushion member 16 may be in either a relaxed or slightly compressed state when the propeller lO 10 is held in place by the nut 22 and tab washer 24. To increase the cushioning effect provided by the cushion member 16, grooves 35 are formed in the cushion member 16 between the walls of the channels 31 and the ridges 26 on the sleeve member 14. The grooves 35 leave void spaces between the walls, thus allowing greater compression of l 5 the cushion member 16 when a shock loading is imposed on the cushion member 16, either by shifting gears or when the propeller 10 collides with an underwater object.
Several forms of the cushion member 16 are shown in Figures 3, 4, and 5, all formed of the same material. The embodiment shown in 20 Figure 3 positions the sleeve member 14 symmetrically in the propeller 10, ~hus providing equal cushioning against impacts from either direction while those shown in Figures 4 and 5 position the sleeve member ridges 26 to provide greater cushioning against impacts occuring when the propeller 10 is rotating in the clockwise direction, 25 as viewed in the figures. The cushion members 16 of Figure 4 and 5 thus allow the greatest shock absorbtion to be provided when the propeller 10 is rotating in a direction to drive it forward and will most frequently be operating at its highest speeds.
The grooves 35 in all of the cushion members 16 are formed on 30 the external surfaces of the members 16, thus allowing the members to be cast with relatively simple permanent die molds. While the grooves 3S are illustrated as axially aligned with the sleeve member 14, other orientations are possible and could even be formed as holes rather than grooves. Though the shape and orientation of the void 35 spaces in the cushion member 16 i~ not critical, the void sp~nces should be arranged to provide an initinl stiffness great enougll to ~Z17390 preven~ any substantial deformation. of the .cushion member 16 ~uring normal operation while allowing substantial deflection during shifting or upon impact.
In operation, the cushion member 16 is ~slightly compressed 5 between the walls of the channels 31 in the propeller 10 and the ridges 26 on the sleeve member 14 as the propeller 10 is driven by the propeller shaft 11. Because the cushion member 16 is loaded in compression. ~uring, ~normal ,operationj. ther,~ is. litt~e chance of ,its failing in operation. ~ Further even should .the cushion. member ,16, fail, l O the ridges 26 on the sleeve member 14 exten~. into the channels 31 and would continue to drive the propeller 10. Should the propeller 10 impact with an under water object, ~he voids in the cushion member 16 will allow some rotation of the propeller shaft 11 and sleeve member 14 relative to the propeller 10 to cushion the impact. The 15 ~voids in th.e cushion member 16 serye,to fur.the,r the cushion effect by increasing the. . relative rotation bet~een- the sleeve member 14 and the propeller 19 under impact loading.
Claims (24)
1. A propeller mounting arrangement comprising:
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B ) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member loosely registering with said channels and C) a cushion member encircling said sleeve member, and cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections and including void spaces between the walls of said grooves and projections.
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B ) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member loosely registering with said channels and C) a cushion member encircling said sleeve member, and cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections and including void spaces between the walls of said grooves and projections.
2. The propeller mounting arrangement defined in claim 1 wherein said void spaces extend axially in said cushion member.
3. The propeller mounting arrangement defined in claim 2 wherein said void spaces are formed on the surface of said cushion member.
4. The propeller mounting arrangement defined in claim 1 wherein at least one of said sleeve member, said cushion member, and said central bore is tapered along its axis.
5. The propeller mounting arrangement defined in claim 1 where in each of said sleeve member, said cushion member, and said central bore is tapered along its axis.
6. The propeller mounting arrangement defined in claim 1 wherein said cushion member is formed of an elastomeric material.
7. The propeller mounting arrangement defined in claim 1 wherein said cushion member has walls that are thicker on one side of said sleeve member projections than on the other side.
8. The propeller mounting arrangement defined in claim 1 wherein said plurality of projections consists of two diametrically opposed ridges and said plurality of channels consists of two diametrically opposed grooves.
9. A mounting arrangement for supporting a propeller on the propeller shaft of a marine propulsion device comprising:
A) a sleeve member having a plurality of radially outwardly projecting ridges extending axially along said sleeve member and having an inner bore in driving engagement with propeller shaft;
B) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said ridges on said sleeve member loosely meshing with said channels; and C) an elastomeric cushion member encircling said sleeve and fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said ridges and channels and partially filling the spaces between the walls of said ridges and channels.
A) a sleeve member having a plurality of radially outwardly projecting ridges extending axially along said sleeve member and having an inner bore in driving engagement with propeller shaft;
B) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said ridges on said sleeve member loosely meshing with said channels; and C) an elastomeric cushion member encircling said sleeve and fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said ridges and channels and partially filling the spaces between the walls of said ridges and channels.
10. The propeller mounting arrangement defined in claim 9 wherein said cushion member includes void spaces between said ridges and said channels to increase the cushion effect there between.
11. The propeller mounting arrangement defined in claim 10 wherein said void spaces extend axially along the surfaces of said cushion member.
12. The propeller mounting arrangement defined in claim 9 where in said cushion member has walls that are thicker on one side of said sleeve member ridges than on the other side.
13. The propeller mounting arrangement defined in claim 9 wherein said plurality of ridges consists of two diametrically opposed ridges and said plurality of channels consists of two diametrically opposed channels.
14. A propeller mounting arrangement comprising:
A) a sleeve member having just two radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and just two channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a cushion member encircling said sleeve, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections.
A) a sleeve member having just two radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a propeller having an outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and just two channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a cushion member encircling said sleeve, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections.
15. The propeller mounting arrangement defined in Claim 14 wherein at least one of said sleeve member, said cushion member, and said central bore is tapered along its axis.
16. The propeller mounting arrangement defined in Claim 14 wherein each of said sleeve member, said cushion member, and said central bore is tapered along its axis.
17. The propeller mounting arrangement defined in Claim 14 wherein said cushion member is formed of an elastomeric material.
18. The propeller mounting arrangement defined in Claim 14 wherein said cushion member has walls that are thicker on one side of said sleeve member projections than on the other side.
19. The propeller mounting arrangement defined in Claim 14 wherein said propeller includes more than two blades attached to said outer hub.
20. The propeller mounting arrangement defined in Claim 1 wherein said channels extend radially outward from said central bore to said outer hub and have their outer most portions defined by said outer hub.
21. The propeller mounting arrangement defined in Claim 14 wherein said channels extend radially outward from said central bore to said outer hub and have their outer most portions defined by said outer hub.
22. A propeller mounting arrangement for a marine outboard propulsion unit having an exhaust gas passage to dis-charge engine exhaust through a propeller hub, said propeller mounting arrangement comprising:
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore there-through and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a single unitary cushion member encircling said sleeve member, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections and including void spaces between the walls of said channels and projections, said void spaces radially located between the outer extremities of said projections and the periphery of said central bore, said cushion member having walls that are thicker on one side of said sleeve member projections than on the other side.
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore there-through and a plurality of channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a single unitary cushion member encircling said sleeve member, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections and including void spaces between the walls of said channels and projections, said void spaces radially located between the outer extremities of said projections and the periphery of said central bore, said cushion member having walls that are thicker on one side of said sleeve member projections than on the other side.
23. A propeller mounting arrangement for a marine outboard propulsion unit having an exhaust gas passage to discharge engine exhaust through a propeller hub, said propeller mounting arrangement comprising:
A) a sleeve member having just two radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and just two channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a single unitary cushion member encircling said sleeve, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections, said cushion member having walls that are thicker on one side of said sleeve member projections than on the other side.
24. A propeller mounting arrangement for a marine outboard propulsion unit having an exhaust gas passage to discharge engine exhaust through a propeller hub, said propeller mounting arrangement comprising:
A) a sleeve member having just two radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and just two channels in the wall of said central bore extending radially outward between said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels; and C) a single unitary cushion member encircling said sleeve, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections, said cushion member having walls that are thicker on one side of said sleeve member projections than on the other side.
24. A propeller mounting arrangement for a marine outboard propulsion unit having an exhaust gas passage to discharge engine exhaust through a propeller hub, said propeller mounting arrangement comprising:
Claim 24 - cont'd ...
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes and having walls defined by said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels whereby relative rotation between said sleeve member and said propeller is limited; and C) a single unitary cushion member encircling said sleeve member, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections.
A) a sleeve member having a plurality of radially outwardly extending projections positioned axially along said sleeve member and having an inner bore for drivingly engaging a propeller shaft;
B) a single unitary propeller having an outer hub, propeller blades attached to said outer hub, an inner hub, and a plurality of vanes connecting said inner hub with said outer hub to form an exhaust gas passageway between said inner and outer hubs, said inner hub having a central bore therethrough and a plurality of channels in the wall of said central bore extending radially outward between said vanes and having walls defined by said vanes, said projections on said sleeve member extending radially outward beyond said central bore into said channels to loosely register with said channels whereby relative rotation between said sleeve member and said propeller is limited; and C) a single unitary cushion member encircling said sleeve member, said cushion member fitting in telescoping relationship between said sleeve member and said propeller inner hub, said cushion member engaging the walls of said channels and projections.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56276483A | 1983-12-19 | 1983-12-19 | |
| US06-562,764 | 1983-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1217390A true CA1217390A (en) | 1987-02-03 |
Family
ID=24247674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000463511A Expired CA1217390A (en) | 1983-12-19 | 1984-09-18 | Shock absorbing propeller |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS60234098A (en) |
| CA (1) | CA1217390A (en) |
| DE (1) | DE3436600A1 (en) |
| GB (1) | GB2151713B (en) |
| SE (1) | SE452973B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5104292A (en) * | 1989-12-13 | 1992-04-14 | Brunswick Corporation | Marine propeller with performance pitch, including five blade version |
| US5236310A (en) * | 1989-12-13 | 1993-08-17 | Brunswick Corporation | Marine propeller with performance pitch, including five blade version |
| SE467222B (en) * | 1990-07-02 | 1992-06-15 | Volvo Penta Ab | LOADING NUTS PROVIDED WITH A TOOL PORTABLE LOADING T EX |
| DK164780C (en) * | 1990-07-18 | 1992-12-28 | Gori 1902 As | propeller hub |
| US5116202A (en) * | 1990-07-25 | 1992-05-26 | Lin Yeun Junn | Impeller |
| IT1296858B1 (en) * | 1997-12-11 | 1999-08-02 | Scaglia Spa | Shrinking device |
| WO2006002463A1 (en) * | 2004-06-30 | 2006-01-12 | Ringprop Trading Limited | Interchangeable propeller hub system |
| JP5979018B2 (en) | 2013-01-22 | 2016-08-24 | ヤマハ発動機株式会社 | Propeller unit and shock absorbing member for propeller unit |
| JP2018118644A (en) | 2017-01-26 | 2018-08-02 | スズキ株式会社 | Propeller unit for vessel propulsion device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045763A (en) * | 1959-10-26 | 1962-07-24 | Perrott William | Shock absorbing positive drive means for marine propellers |
| DE3244666A1 (en) * | 1982-12-02 | 1984-06-07 | Leemhuis Marinkonsult AB, 73400 Hallstahammar | Drive, in particular a marine drive |
-
1984
- 1984-09-18 CA CA000463511A patent/CA1217390A/en not_active Expired
- 1984-09-20 GB GB08423773A patent/GB2151713B/en not_active Expired
- 1984-10-05 DE DE19843436600 patent/DE3436600A1/en active Granted
- 1984-10-19 JP JP22032684A patent/JPS60234098A/en active Pending
- 1984-12-17 SE SE8406413A patent/SE452973B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3436600A1 (en) | 1985-06-27 |
| GB2151713B (en) | 1987-09-23 |
| GB8423773D0 (en) | 1984-10-24 |
| JPS60234098A (en) | 1985-11-20 |
| SE8406413D0 (en) | 1984-12-17 |
| GB2151713A (en) | 1985-07-24 |
| SE8406413L (en) | 1985-06-20 |
| SE452973B (en) | 1988-01-04 |
| DE3436600C2 (en) | 1987-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |