US3865068A - Stern drive engine mount - Google Patents

Stern drive engine mount Download PDF

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Publication number
US3865068A
US3865068A US325398A US32539873A US3865068A US 3865068 A US3865068 A US 3865068A US 325398 A US325398 A US 325398A US 32539873 A US32539873 A US 32539873A US 3865068 A US3865068 A US 3865068A
Authority
US
United States
Prior art keywords
engine
housing
annular
drive shaft
cylindrical
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 - Lifetime
Application number
US325398A
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English (en)
Inventor
William D Haasl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brunswick Corp
Original Assignee
Brunswick Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brunswick Corp filed Critical Brunswick Corp
Priority to US325398A priority Critical patent/US3865068A/en
Priority to GB170374A priority patent/GB1433430A/en
Priority to DE2402158A priority patent/DE2402158C3/de
Priority to FR7401759A priority patent/FR2214856B1/fr
Priority to AU64722/74A priority patent/AU478211B2/en
Priority to SE7400745A priority patent/SE395424B/sv
Priority to JP49009196A priority patent/JPS522199B2/ja
Application granted granted Critical
Publication of US3865068A publication Critical patent/US3865068A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/30—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes
    • B63H21/305—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes with passive vibration damping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/02—Mounting of propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/14—Transmission between propulsion power unit and propulsion element
    • B63H20/22—Transmission between propulsion power unit and propulsion element allowing movement of the propulsion element about at least a horizontal axis without disconnection of the drive, e.g. using universal joints

Definitions

  • ABSTRACT A three point mounting system for the engine of a marine inboard-outboard stern drive unit.
  • Bi-axially adjustable side mounts support the weight of the engine and an elastomeric sealing element around the drive shaft housing is radially expanded within a cylindrical passage through the transom to steady the engine in the region immediately adjacent the U-joint.
  • FIG. 11 illustrates an inboard-outboard marine pro- Inboard-outboard for stern drive marine propulsion 5 PulSion Unit ud ng n engine I and an outboard units generally of the type illustrated in FIG. 1 are well known to the art. These units employ a double cardan universal joint to couple the outboard drive shaft to the inboard engine drive shaft. This permits the outboard unit to be tilted upwardly about a horizontal axis through the U-joint assembly, and to be simultaneously turned about a vertical axis through the U-joint assembly.
  • the double U-joint assembly inherently produces two force pulses per revolution; which pulses increase in magnitude with the degree of angular displacement of the outboard drive assembly from the axis of the engine drive shaft.
  • moderate to severe vibrations can result when the unit is put into a hard turn at high power, which vibrations are both annoying and destructive.
  • the invention comprises a threepoint engine mounting system including bi-axially adjustable engine side mounts, a single point stern mount comprising a radially expandable elastomeric element positioned around a drive shaft housing and means associated with the drive shaft housing for expanding the elastomeric element radially into contact with the inner walls of a cylindrical passage through the transom plate.
  • a primary advantage of the invention is the simplicity and utility with which the aforementioned objectives are achieved.
  • Another advantage of the invention is that it provides for, and permits adjustment of, axial positioning of the engine.
  • a further advantage of the invention is that it provides positive radial alignment of the engine drive shaft at the point of the rear mounting.
  • FIG. 1 is a partially cut-away side elevation of an engine and associated stern drive unit as installed in a boat.
  • FIG. 2 is a cross-sectional view of a side engine mount taken along line 2-2 of FIG. 1.
  • FIG. 3 is a cut-away side view of the single point rear engine mount of the invention.
  • FIG. 4 is a rear end view of the single point engine mount of the invention taken along line 4-4 of FIG. 3.
  • stern drive 2 The engine is supported on each side by r a side engine mount 3, such as illustrated in FIG. 2, and at the rear by the annularly expanding mount of the invention' 4.
  • the outboard drive housing 5 is secured to the transom 6 of the boat by bolts such as 7 which extend through the transom and engage an inboard transom plate 3.
  • a drive shaft housing 9 extends rearwardly on the engine I into a cylindrical channel ll through the transom 6.
  • FIG. 2 illustrates a bi-axially adjustable engine mount of a type known to the art.
  • the base 15 of the mount is secured to appropriate structural members of the boat hull while the adjustable member 16 is bolted to the side of the engine 1.
  • the base units 15 are spaced laterally sufficiently to permit lateral alignment of the engine through the sliding of the adjustable element 16 upon a supporting cylinder 17 passing therethrough.
  • means are provided to lock element 16 in the selected position upon the supporting bar 17.
  • the engine may then be adjusted vertically by use of the retaining bolts 18 of the mounting units in a manner known to the art.
  • the novel mounting unit of the invention comprises a drive shaft housing 9 secured to the engine transmission cover 10 by bolts such as 12.
  • An annular step 23 in the outer wall 24 of the housing 9 provides a seat for an annular elastomeric mounting element 25.
  • An annular locking collar 26 attaches to the outer end of the housing 9 and functions as illustrated to retain a bearing 22 in an annular seat 20 cut into the inner wall 21 of the housing 9, and to axially compress the elastomeric mounting element 25 against its seat 23.
  • the housing 9 is retained in place by a series of nuts 27 which thread onto studs 28 seated in the housing 9.
  • Passage 11 may be provided by a structural element 31 of the stern drive housing 5 extending through the transom 6 of the boat.
  • the cylindrical passage ll could be provided by structure associated with the transom plate 8.
  • Element 31 includes a radial shoulder 32 which extends inwardly into the cylindrical passage 11 and serves to position the engine and drive shaft in fore and aft position for connection to the double U-joint.
  • the position of the drive shaft housing 9 may be locked by friction as described at any position within the channel 11- by merely tightening of the collar 26.
  • This feature of the invention provides an added dimension in engine alignment which may be utilized if desired; although it is anticipated that the engine will be positioned by the abutment of ring 26 against the shoulder 32 as described above.
  • the collar 26 may be retained by six nuts 27 equally spaced about its circumference, and should include a grease fitting and necessary channeling (not shown) through which the bearing 22 may be lubricated.
  • the driving shaft 19 of U-joint assembly is splined to the output shaft 39 of transmission and is normally a part of the outdrive assembly, which is installed after the engine has been mounted.
  • the engine is first positioned fore and aft as described, the side mounts 3 fastened to the stringers in the boat hull, and then the collar 26 is tightened.
  • the engine drive shaft may then be finally aligned as required by vertical and horizontal adjustments of the side mounts.
  • an improved engine mounting arrangement comprising:
  • said cylindrical housing having an annular step
  • said aft mount assembly including an annular elastomeric sealing and vibration absorbing element disposed around and upon said housing with one side abutting said step, and
  • transom plate assembly including a transom plate having a cylindrical passage therein, said passage having an end opening to the engine side of said transom plate, said cylindrical passage being adapted to axially receive therein through said open end said entire aft mount assembly, so that said entire mount assembly may be thrust into said passage through said open end and secured at various selected positions within said cylindrical passage.
  • step comprises an annular axially extending portion of said cylindrical housing having a reduced radius
  • said means for axially compressing said elastomeric element includes an annular member adapted to ride partially over said axial portion and means for urging said annular member against the after end of said housing and said elastomeric element.
  • transom plate member includes abutment means cooperating with said aft mount assembly for limiting the penetration of said housing and mount within said cylindrical passage and for axially positioning said engine for attachment to said outdrive unit.
  • the device of claim 3 further including bi-axially adjustable engine mounts attached at selected points on each side of the engine and adapted for attachment to the bottom hull structure of a boat.
  • the device of claim 2 further including a bearing for the system drive shaft assembly and means for mounting said bearing inside of said drive shaft housing, including annular abutment means inside said cylindrical housing adapted to seat one side of said bearing and wherein said annular compressing member comprises a movable seat for the other side of said

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Support Of The Bearing (AREA)
  • Vibration Prevention Devices (AREA)
US325398A 1973-01-22 1973-01-22 Stern drive engine mount Expired - Lifetime US3865068A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US325398A US3865068A (en) 1973-01-22 1973-01-22 Stern drive engine mount
GB170374A GB1433430A (en) 1973-01-22 1974-01-14 Inboard-outboard marine drive system
DE2402158A DE2402158C3 (de) 1973-01-22 1974-01-17 Innenbord-Außenbord-Bootsantrieb
FR7401759A FR2214856B1 (sv) 1973-01-22 1974-01-18
AU64722/74A AU478211B2 (en) 1973-01-22 1974-01-21 Stern drive engine mount
SE7400745A SE395424B (sv) 1973-01-22 1974-01-21 Motormonteringsarrangemang vid ett drivsystem for inombords - utombordsmotorer
JP49009196A JPS522199B2 (sv) 1973-01-22 1974-01-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US325398A US3865068A (en) 1973-01-22 1973-01-22 Stern drive engine mount

Publications (1)

Publication Number Publication Date
US3865068A true US3865068A (en) 1975-02-11

Family

ID=23267726

Family Applications (1)

Application Number Title Priority Date Filing Date
US325398A Expired - Lifetime US3865068A (en) 1973-01-22 1973-01-22 Stern drive engine mount

Country Status (6)

Country Link
US (1) US3865068A (sv)
JP (1) JPS522199B2 (sv)
DE (1) DE2402158C3 (sv)
FR (1) FR2214856B1 (sv)
GB (1) GB1433430A (sv)
SE (1) SE395424B (sv)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370138A (en) * 1977-07-02 1983-01-25 Bayerische Motoren Werke A.G. Installation for supporting a boat engine installed inboard at a transom plate
US4666412A (en) * 1985-05-30 1987-05-19 Outboard Marine Corporation Marine engine mounting apparatus
US4753619A (en) * 1985-04-11 1988-06-28 Sullivan Donald K Marine propulsion device bellows assembly
US4905956A (en) * 1988-05-26 1990-03-06 Brunswick Corporation Fluid mounting system for a marine engine
US4911666A (en) * 1987-06-15 1990-03-27 Us Marine Corporation Boat propulsion device with internal exhaust
US5397257A (en) * 1993-02-03 1995-03-14 Land & Sea, Inc. Drive extender for a stern drive unit and such a unit incorporating the extender
US5688152A (en) * 1995-09-25 1997-11-18 Ab Volvo Penta Marine drive unit with the primary shaft bearing mounted in the engine flywheel cover
US5979884A (en) * 1997-02-28 1999-11-09 Toyo Tire & Rubber Co., Ltd. Vibration isolating apparatus
US6287159B1 (en) 2000-10-23 2001-09-11 Brunswick Corporation Marine propulsion device with a compliant isolation mounting system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE449336B (sv) * 1982-02-03 1987-04-27 Volvo Penta Ab Anordning for montering av ett inudrev

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977923A (en) * 1959-03-24 1961-04-04 Penta Ab Marine inboard motor power unit
US3204598A (en) * 1963-05-01 1965-09-07 Dana Corp Resilient mount for marine drive units
US3259099A (en) * 1964-06-08 1966-07-05 Kiekhaefer Corp Aligned inboard engine suspension for inboard-outboard drives
US3529564A (en) * 1967-09-16 1970-09-22 Bayerische Motoren Werke Ag Boat drive

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654889A (en) * 1970-09-28 1972-04-11 Volvo Penta Ab Hydraulic system for a boat drive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977923A (en) * 1959-03-24 1961-04-04 Penta Ab Marine inboard motor power unit
US3204598A (en) * 1963-05-01 1965-09-07 Dana Corp Resilient mount for marine drive units
US3259099A (en) * 1964-06-08 1966-07-05 Kiekhaefer Corp Aligned inboard engine suspension for inboard-outboard drives
US3529564A (en) * 1967-09-16 1970-09-22 Bayerische Motoren Werke Ag Boat drive

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370138A (en) * 1977-07-02 1983-01-25 Bayerische Motoren Werke A.G. Installation for supporting a boat engine installed inboard at a transom plate
US4753619A (en) * 1985-04-11 1988-06-28 Sullivan Donald K Marine propulsion device bellows assembly
US4666412A (en) * 1985-05-30 1987-05-19 Outboard Marine Corporation Marine engine mounting apparatus
US4911666A (en) * 1987-06-15 1990-03-27 Us Marine Corporation Boat propulsion device with internal exhaust
US4905956A (en) * 1988-05-26 1990-03-06 Brunswick Corporation Fluid mounting system for a marine engine
US5397257A (en) * 1993-02-03 1995-03-14 Land & Sea, Inc. Drive extender for a stern drive unit and such a unit incorporating the extender
US5688152A (en) * 1995-09-25 1997-11-18 Ab Volvo Penta Marine drive unit with the primary shaft bearing mounted in the engine flywheel cover
US5979884A (en) * 1997-02-28 1999-11-09 Toyo Tire & Rubber Co., Ltd. Vibration isolating apparatus
US6287159B1 (en) 2000-10-23 2001-09-11 Brunswick Corporation Marine propulsion device with a compliant isolation mounting system

Also Published As

Publication number Publication date
JPS49103393A (sv) 1974-09-30
DE2402158A1 (de) 1974-08-22
FR2214856B1 (sv) 1977-08-26
DE2402158C3 (de) 1986-01-09
SE395424B (sv) 1977-08-15
FR2214856A1 (sv) 1974-08-19
GB1433430A (en) 1976-04-28
AU6472274A (en) 1975-07-24
JPS522199B2 (sv) 1977-01-20
DE2402158B2 (de) 1977-07-14

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