US2918986A - Marine drive lubricating system - Google Patents

Marine drive lubricating system Download PDF

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Publication number
US2918986A
US2918986A US730946A US73094658A US2918986A US 2918986 A US2918986 A US 2918986A US 730946 A US730946 A US 730946A US 73094658 A US73094658 A US 73094658A US 2918986 A US2918986 A US 2918986A
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Prior art keywords
gear housing
shaft
housing
lubricant
drive
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US730946A
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Leipert Edward
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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
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • 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
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
    • 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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
    • F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19023—Plural power paths to and/or from gearing
    • Y10T74/19074—Single drive plural driven
    • Y10T74/19079—Parallel
    • Y10T74/19088—Bevel

Definitions

  • a stabilized oil temperature will be brought about whereby all of the lubricant within the system will be at a temperature suitable for its purposes.
  • the lubricant carried Within the gear housing 12 will not be excessively hot and the lubricant Within the propeller housing 14 will be heated to permit greater efiiciency of operation of the gears and other moving parts within it.
  • the vertical propeller shaft 19 adjacent the discharge end of the pump 27 is provided with a beveled orifice 33. It will also be apparent that the vertical shaft 19 is secured by means of splines 21 to the horizontal bevel gear 22. A spline connection is also provided between the vertical shaft 19 and the bevel gear 23 located at the lower end of said shaft. As a result of the splined attachment of the vertical shaft between the gears 22 and 23, the shaft in effect floats freely Within limits in the propulsion device. In the event that the pump 27 builds up an excessive pressure of lubricant, due to the flow resistance of cold oil through the bore 20 the orifice 33 will be unable to receive it and the entire vertical shaft 19 will be moved upwardly and away from the outlet end 34 of said pump. The lubricant 16 will then escape laterally and fall back into the chamber 26 of the gear housing 14.
  • Figure 3 illustrates a second embodiment of the present invention in which the lubricant is led through the gear housing 12 by means of bores or ducts 35.
  • the lubricant is brought up through the central bore 20 of the vertical shaft 19 as has been previously described and then takes a path indicated in Figure 3 by the arrows 36.
  • the bores 35 are provided in the structure of the housing 12 and in the upper housing cover 37 to enable the lubricant to reach all of the moving parts Within the housing 12. As the oil flows down through the housing 12 and towards the bottom reservoir within the chamber 26 it is directed by the bores 35 into contact with all of the portions of the mechanism requiring lubrication.
  • An oil shield 38 is disposed within the bearing 39 and is provided with a small hole to permit only a small amount of the lubricant to enter the bearing 39 and to cause the major portion of the lubricant to follow the path indicated by the arrows through the bores and into contact with the remainder of the mechanism.
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a'lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear'housing.
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, an overflow pipe within the reservoir and disposed around the shaft to regulate the level of the lubricant in said reservoir and direct the overflow through the shaft housing to the propeller gear housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
  • a marine drive lubricating system comprising, an
  • a normally submerged propeller gear housing driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, bores within the housings to lead the lubricant from the top of the longitudinal bore through the drive means and into the propeller gear housing chamher, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, an overflow pipe within the reservoir and disposed around the shaft to regulate the level of the lubricant in said reservoir and direct the overflow through the shaft housing to the propeller gear housing, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear
  • a marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, bores within the housings to lead the lubricant from the top of the longitudinal bore through the drive means and into the propeller gear housing chamber, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Details Of Gearings (AREA)

Description

Dec. 29, 1959 E. LEIPERT MARINE DRIVE LUBRICATING SYSTEM Filed April 25. 1958 3 Sheets- Sheet 2 Fig. 5.
INVENTOR.
EDWARD LElP-ERT ATTORNEY Dec. 29, 1959 E. LEIPERT MARINE DRIVE LUBRICATING SYSTEM Filed April 25. 1958 3 Sheets-Sheet 3 Fig- E.
i v/iflllllm- \\\\\\\\L IIIIIIIIIII/ INVENTOR.
EDWARD LEIPERT ATTORNEY the chamber 26, lubricating the various elements'it en lationship between the oil or lubricant 16 Within this housing 14 and the surrounding water. The heat exchange effected will cool the lubricant contained therein. On the other hand, the rapidly churning bevel gears 17, located within the gear housing 12, together with the other rotating parts which create friction heat will tend to overheat the lubricant 16 within the reservoir 15. The hereindescribed device therefor Will operate to constantly vtransfer lubricant from the cooling chamber housing 14 to the portion of the propulsion device which tends to overheat the lubricant. After a period of running, a stabilized oil temperature will be brought about whereby all of the lubricant within the system will be at a temperature suitable for its purposes. The lubricant carried Within the gear housing 12 will not be excessively hot and the lubricant Within the propeller housing 14 will be heated to permit greater efiiciency of operation of the gears and other moving parts within it.
It will be noted that the vertical propeller shaft 19 adjacent the discharge end of the pump 27 is provided with a beveled orifice 33. It will also be apparent that the vertical shaft 19 is secured by means of splines 21 to the horizontal bevel gear 22. A spline connection is also provided between the vertical shaft 19 and the bevel gear 23 located at the lower end of said shaft. As a result of the splined attachment of the vertical shaft between the gears 22 and 23, the shaft in effect floats freely Within limits in the propulsion device. In the event that the pump 27 builds up an excessive pressure of lubricant, due to the flow resistance of cold oil through the bore 20 the orifice 33 will be unable to receive it and the entire vertical shaft 19 will be moved upwardly and away from the outlet end 34 of said pump. The lubricant 16 will then escape laterally and fall back into the chamber 26 of the gear housing 14.
Figure 3 illustrates a second embodiment of the present invention in which the lubricant is led through the gear housing 12 by means of bores or ducts 35. The lubricant is brought up through the central bore 20 of the vertical shaft 19 as has been previously described and then takes a path indicated in Figure 3 by the arrows 36. The bores 35 are provided in the structure of the housing 12 and in the upper housing cover 37 to enable the lubricant to reach all of the moving parts Within the housing 12. As the oil flows down through the housing 12 and towards the bottom reservoir within the chamber 26 it is directed by the bores 35 into contact with all of the portions of the mechanism requiring lubrication.
An oil shield 38 is disposed within the bearing 39 and is provided with a small hole to permit only a small amount of the lubricant to enter the bearing 39 and to cause the major portion of the lubricant to follow the path indicated by the arrows through the bores and into contact with the remainder of the mechanism.
It will be seen from the disclosure made in connection with Figure 3, that the lubricating system employed is a directed one rather than a splash type as illustrated in connection with Figure 1.
While the present disclosure has dealt with marine drive structures, it is within the purview of the present invention to employ the lubricating system herein described and illustrated in other forms of drive wherein the'lubricant passes from one chamber having a lower temperature to one or more other chambers having substantially higher temperatures by a circulation of said lubricant whereby a suitable and highly desirable lubricant temperature can be achieved at all times.
Having thus fully described the invention, What is claimed as new and desired to be secured by Letters Patent of the United States is:
l. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a'lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear'housing.
2. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
3. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, an overflow pipe within the reservoir and disposed around the shaft to regulate the level of the lubricant in said reservoir and direct the overflow through the shaft housing to the propeller gear housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
4. A marine drive lubricating system comprising, an
upper gear housing, drive means in said gear housing,
a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
5. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, a longitudinal bore in said shaft, bores within the housings to lead the lubricant from the top of the longitudinal bore through the drive means and into the propeller gear housing chamher, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
6. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving reservoir in the upper gear housing, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, an overflow pipe within the reservoir and disposed around the shaft to regulate the level of the lubricant in said reservoir and direct the overflow through the shaft housing to the propeller gear housing, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
7. A marine drive lubricating system comprising, an upper gear housing, drive means in said gear housing, a normally submerged propeller gear housing, driven means in the propeller gear housing and a drive shaft housing interconnecting the gear housings, a lubricant receiving and cooling chamber in the propeller gear housing, a vertically disposed shaft in the drive housing extending from the drive means to the driven means, means comprising splines on said shaft operatively engaging the drive means whereby the shaft can shift longitudinally within the drive housing, a longitudinal bore in said shaft, bores within the housings to lead the lubricant from the top of the longitudinal bore through the drive means and into the propeller gear housing chamber, and pump means within the propeller gear housing, an outlet passage on the pump, said pump being in abutting relationship with the bottom end of the shaft and having its outlet passage in register with the longitudinal bore to move the lubricant from the propeller gear housing chamber through the bore and into the upper gear housing.
References Cited in the file of this patent UNITED STATES PATENTS 1,822,573 Fitz Gerald et a1. Sept. 8, 1931 2,458,813 Wanzer Jan. 11, 1949 2,496,434 Bosma Feb. 7, 1950 2,724,448 Rossler et a1. Nov. 22, 1955
US730946A 1958-04-25 1958-04-25 Marine drive lubricating system Expired - Lifetime US2918986A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1581012B1 (en) * 1962-07-04 1970-10-08 Reiners U Wiggermann Lubrication and cooling system for steering propeller drives
US3647024A (en) * 1970-04-30 1972-03-07 Outboard Marine Corp Upper driveshaft bearing lubrication for marine propulsion unit
US3786901A (en) * 1971-06-03 1974-01-22 Weir Pumps Ltd Sealed lubricating system module
US3799291A (en) * 1971-03-05 1974-03-26 Schottel Werft Lubricating device for a z-drive for ships
US3848702A (en) * 1972-10-02 1974-11-19 Copeland Corp Lubricating system for vertical machine elements
US3877546A (en) * 1973-04-12 1975-04-15 Airco Inc Lubrication system for vertical spindle motor
US4719768A (en) * 1984-12-10 1988-01-19 Lonati S.P.A. Circular knitting machine, in particular for hose knitting, with continuous cycle lubrication
WO1988010395A1 (en) * 1987-06-17 1988-12-29 Brunswick Corporation Marine stern drive oil cooling and circulating as well as pumping system
US4993979A (en) * 1989-05-12 1991-02-19 Outboard Marine Corporation Marine propulsion device
US5035664A (en) * 1989-05-12 1991-07-30 Outboard Marine Corporation Marine propulsion device gear arrangement
US8746410B1 (en) * 2008-03-14 2014-06-10 Raymond P. Lekowicz Outdrive gear oil monitor
US20140318898A1 (en) * 2011-11-18 2014-10-30 Wartsila Finland Oy Method of arranging the lubrication of a steerable thruster of a marine vessel and a lubrication arrangement therefor
CN104691326A (en) * 2014-12-23 2015-06-10 中国北方车辆研究所 Transmission power take-off system for amphibious vehicle
EP3279079A1 (en) * 2016-08-04 2018-02-07 Caterpillar Propulsion Production AB Lubrication system for azimuth thruster

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1822573A (en) * 1930-08-07 1931-09-08 Fitz Gerald Outboard drive for motor boats
US2458813A (en) * 1943-02-13 1949-01-11 Murray & Tregurtha Inc Outboard propeller mechanism for barges, scows, and the like
US2496434A (en) * 1944-10-13 1950-02-07 Hart Carter Co Outboard motor lubricating system
US2724448A (en) * 1953-03-03 1955-11-22 Daimler Benz Ag Tractor-trailer coupling device with power transmission means therein

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1822573A (en) * 1930-08-07 1931-09-08 Fitz Gerald Outboard drive for motor boats
US2458813A (en) * 1943-02-13 1949-01-11 Murray & Tregurtha Inc Outboard propeller mechanism for barges, scows, and the like
US2496434A (en) * 1944-10-13 1950-02-07 Hart Carter Co Outboard motor lubricating system
US2724448A (en) * 1953-03-03 1955-11-22 Daimler Benz Ag Tractor-trailer coupling device with power transmission means therein

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1581012B1 (en) * 1962-07-04 1970-10-08 Reiners U Wiggermann Lubrication and cooling system for steering propeller drives
US3647024A (en) * 1970-04-30 1972-03-07 Outboard Marine Corp Upper driveshaft bearing lubrication for marine propulsion unit
US3799291A (en) * 1971-03-05 1974-03-26 Schottel Werft Lubricating device for a z-drive for ships
US3786901A (en) * 1971-06-03 1974-01-22 Weir Pumps Ltd Sealed lubricating system module
US3848702A (en) * 1972-10-02 1974-11-19 Copeland Corp Lubricating system for vertical machine elements
US3877546A (en) * 1973-04-12 1975-04-15 Airco Inc Lubrication system for vertical spindle motor
US4719768A (en) * 1984-12-10 1988-01-19 Lonati S.P.A. Circular knitting machine, in particular for hose knitting, with continuous cycle lubrication
WO1988010395A1 (en) * 1987-06-17 1988-12-29 Brunswick Corporation Marine stern drive oil cooling and circulating as well as pumping system
US4993979A (en) * 1989-05-12 1991-02-19 Outboard Marine Corporation Marine propulsion device
US5035664A (en) * 1989-05-12 1991-07-30 Outboard Marine Corporation Marine propulsion device gear arrangement
US8746410B1 (en) * 2008-03-14 2014-06-10 Raymond P. Lekowicz Outdrive gear oil monitor
US20140318898A1 (en) * 2011-11-18 2014-10-30 Wartsila Finland Oy Method of arranging the lubrication of a steerable thruster of a marine vessel and a lubrication arrangement therefor
US9630693B2 (en) * 2011-11-18 2017-04-25 Wartsila Finland Oy Method of arranging the lubrication of a steerable thruster of a marine vessel and a lubrication arrangement therefor
CN104691326A (en) * 2014-12-23 2015-06-10 中国北方车辆研究所 Transmission power take-off system for amphibious vehicle
CN104691326B (en) * 2014-12-23 2017-11-17 中国北方车辆研究所 A kind of amphibious vehicle is driven power taking system
EP3279079A1 (en) * 2016-08-04 2018-02-07 Caterpillar Propulsion Production AB Lubrication system for azimuth thruster

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