WO2008076061A1 - A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method - Google Patents

A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method Download PDF

Info

Publication number
WO2008076061A1
WO2008076061A1 PCT/SE2007/050954 SE2007050954W WO2008076061A1 WO 2008076061 A1 WO2008076061 A1 WO 2008076061A1 SE 2007050954 W SE2007050954 W SE 2007050954W WO 2008076061 A1 WO2008076061 A1 WO 2008076061A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
gearbox
sump
gear combinations
tank
Prior art date
Application number
PCT/SE2007/050954
Other languages
French (fr)
Inventor
Hilding Nilsson
Dieter Slapak
Original Assignee
Scania Cv Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39536565&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008076061(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Publication of WO2008076061A1 publication Critical patent/WO2008076061A1/en

Links

Classifications

    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0409—Features relating to lubrication or cooling or heating characterised by the problem to increase efficiency, e.g. by reducing splash losses
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0457—Splash lubrication
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0493—Gearings with spur or bevel gears
    • F16H57/0494—Gearings with spur or bevel gears with variable gear ratio or for reversing rotary motion

Definitions

  • the invention relates to a method for reducing the rotation resistance of gears in a gearbox for a motor vehicle, which gearbox comprises partly a plurality of pairs of mutually engaging gearwheels which constitute various gear combinations of the gearbox, and partly a direct drive between an input shaft and an output shaft of the gearbox, in which operating with gear combinations engaged involves maintaining in the gearbox an oil level such that a peripheral portion of lower gearwheels of the gear combinations is immersed in oil in an oil sump of the gearbox.
  • the invention also relates to a gearbox which makes it possible to reduce the rotation resistance to gears in the gearbox during direct-drive operation.
  • An object of the present invention is to propose a method of the kind mentioned in the introduction which makes it possible to avoid splash losses during direct-drive operation.
  • the method according to the invention in its broadest meaning is distinguished by the features indicated in the independent claim 1. Splash losses in the gearbox can be reduced by temporarily lowering the oil level in the oil sump when direct-drive operation commences to a level at which the lower gearwheels of the gear combinations rotate with substantially no contact with the oil.
  • the oil level lowering is effected by the lower gearwheels of the gear combinations being caused to propel oil from the surface region into an adjacent oil gathering tank, with momentary closure of the outlet leading back to the oil sump.
  • Another object of the present invention is to provide a gearbox which makes it possible to implement this method with regulation of the oil level in the sump in different operating situations.
  • the gearbox according to the invention is distinguished by the features indicated in the independent claim 4.
  • Fig. 1 is a schematic cross-sectional view through a gearbox according to the invention in a static position of rest;
  • Fig. 2 is a similar cross-sectional view in an operating state where direct drive has just been engaged
  • Fig. 3 depicts the gearbox in a subsequent operating state where the oil level in the oil sump has been lowered.
  • the gearbox 10 according to the invention depicted in schematic cross-section in Figs. 1-3 comprises a housing 12 in which two parallel shafts which bear gearwheels, viz. an upper mainshaft 14 and a lower countershaft 16, are supported for rotation.
  • the gearwheel pair 18, 20 depicted in the drawings thus constitutes one of a plurality of gear combinations of the gearbox 10.
  • the lower gearwheels 20 etc. are kept immersed a few centimetres deep in oil in an oil sump 22 in the bottom portion of the gearbox housing 12 in order, during operation, to lubricate and cool the gearwheels 18, 20 of all the gear combinations.
  • This immersion of the gearwheels causes splash losses when they rotate in the oil, which is also the case when direct drive is engaged in the gearbox, i.e. when power is transmitted directly between the input and output shafts at the transmission ratio 1 : 1 and there is therefore no load on the gearwheels of the gear combinations, which then do not need the lubrication and cooling which are required during operation with these gear combinations.
  • the present invention proposes that the normal level Ni (Fig.
  • a guide plate 30 may be suitably curved to facilitate the introduction of the oil into the tank 24.
  • an outlet 32 which leads back to the tank 24, is situated above the free oil surface in the sump and has arranged in it an electrically operable valve 34 which can be kept open or closed depending on the respective operating situation.
  • the outlet 32 may also be situated at a level below the free oil level in the sump 22 to lead oil accumulated in the tank 24 to the sump 22.
  • valve 34 in the outlet 32 of the tank 24 is kept open so that the oil sprayed into the tank 24 can be led directly back to the sump 22 in order to maintain a correct oil level Ni therein.
  • the valve 34 closes, whereupon the tank 24 begins to fill with the oil which the gearwheels 20 splash in via the inlet aperture 26 (see Fig. 2).
  • the volume of the tank 24 is with advantage adapted, in principle, to the amount of oil which has to be transferred from the sump 22 to the tank 24 in order to lower the oil level to the level N 2 at which the gearwheels 20 rotate with substantially no contact with the oil in the sump 22 (Fig. 3).
  • valve 34 When thereafter a gear is engaged via any of the gear combinations of the gearbox, the valve 34 opens immediately in order to quickly restore the oil level Ni in the sump 22. To this end the valve 32 has a large outlet cross-section. To ensure trouble-free movement of oil back from the tank 24 to the sump 22 in cases where the outlet 32 is situated above the oil level in the sump 22, a shielding element 36 is arranged between the outlet 32 of the tank 24 and the lower gearwheels 20 etc. of the gear combinations.
  • the proposed embodiment of the gearbox according to the invention thus makes it possible, without supplying energy to, for example, an external oil pump, to temporarily lower the oil level while running in direct drive and hence reduce the splash losses in the gearbox.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

A gearbox (10) in which the normal oil level (Nj) for operating with gear combinations of the gearbox is temporarily lowered during direct-drive operation to a level (N2) at which lower gearwheels (20) of the gear combinations rotate with substantially no contact with the oil in the oil sump (22). The oil level is raised back to the normal level (N1) upon engagement of gear combinations. To this end, an oil gathering tank (24) is connected to the gearbox housing (12) and has not only an upper oil inlet (26) in the region (28) of the housing (12) which during operation of gear combinations of the gearbox is exposed to oil splash from the lower gearwheels (20) immersed in the oil in the oil sump (22), but also a lower outlet (32) for leading oil accumulated in the tank (24) back to the oil sump (22). The outlet (32) is closable during direct-drive operation in order to lower the oil level in the oil sump (22).

Description

A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method
Background to the invention
1. Technical field
The invention relates to a method for reducing the rotation resistance of gears in a gearbox for a motor vehicle, which gearbox comprises partly a plurality of pairs of mutually engaging gearwheels which constitute various gear combinations of the gearbox, and partly a direct drive between an input shaft and an output shaft of the gearbox, in which operating with gear combinations engaged involves maintaining in the gearbox an oil level such that a peripheral portion of lower gearwheels of the gear combinations is immersed in oil in an oil sump of the gearbox. The invention also relates to a gearbox which makes it possible to reduce the rotation resistance to gears in the gearbox during direct-drive operation.
2. State of the art In gearboxes of conventional types the lower gearwheels of the various gear combinations in the gearbox normally rotate with their periphery immersed in the oil in the oil sump of the gearbox housing in order, during operation, to lubricate and cool the loaded gearwheels of the various gear combinations. During direct-drive operation, however, i.e. when the input and output shafts of the gearbox are connected together with the transmission ratio 1:1, the lower gearwheels of the gear combinations are not loaded and need no direct lubrication and cooling. Keeping these gearwheels immersed in the oil in the oil sump entails energy consumption through splash losses. Since more than 90% of all driving involves direct-drive operation, these losses due to rotation resistance become substantial in the long term.
One way of reducing such splash losses has been to use a "dry sump" whereby oil is pumped from an underlying accumulator tank and is caused to spray the active gearwheels, after which the oil dropping off can run back to the tank via bottomholes in the sump. This entails using an energy-consuming pump and special nozzles for spraying the gearwheels.
Summary of the invention
An object of the present invention is to propose a method of the kind mentioned in the introduction which makes it possible to avoid splash losses during direct-drive operation. To this end, the method according to the invention in its broadest meaning is distinguished by the features indicated in the independent claim 1. Splash losses in the gearbox can be reduced by temporarily lowering the oil level in the oil sump when direct-drive operation commences to a level at which the lower gearwheels of the gear combinations rotate with substantially no contact with the oil.
According to a preferred embodiment of the method according to the invention, the oil level lowering is effected by the lower gearwheels of the gear combinations being caused to propel oil from the surface region into an adjacent oil gathering tank, with momentary closure of the outlet leading back to the oil sump. This involves using the rotational energy of the lower gearwheels to move oil to a higher positional potential in a tank, with the possibility of the tank outlet being opened immediately upon reversion to operating with gear combinations, so that the oil can run spontaneously back to the sump and raise the oil level to the normal level for gear combinations.
Another object of the present invention is to provide a gearbox which makes it possible to implement this method with regulation of the oil level in the sump in different operating situations. To this end, the gearbox according to the invention is distinguished by the features indicated in the independent claim 4. When direct drive is engaged, using the rotating lower gearwheels of the gear combinations as conveying wheels for moving oil up from the sump to an inlet to an adjacent tank which has its outlet temporarily closed lowers the oil level in the sump so much that the lower gearwheels rotate with substantially no contact with the oil in the sump, thereby reducing splash losses without having to supply further energy for pumping oil back to the sump when any of the gear combinations are activated.
Further features of the method and the gearbox according to the invention are indicated by the detailed description set out below and the dependent claims with reference to the attached drawings.
Brief description of the drawings
Fig. 1 is a schematic cross-sectional view through a gearbox according to the invention in a static position of rest;
Fig. 2 is a similar cross-sectional view in an operating state where direct drive has just been engaged; and
Fig. 3 depicts the gearbox in a subsequent operating state where the oil level in the oil sump has been lowered.
Detailed description of a preferred embodiment of the invention
The gearbox 10 according to the invention depicted in schematic cross-section in Figs. 1-3 comprises a housing 12 in which two parallel shafts which bear gearwheels, viz. an upper mainshaft 14 and a lower countershaft 16, are supported for rotation. The mainshaft 14, which is connectable to undepicted input and output shafts at the ends of the gearbox, bears a plurality of gearwheels for different gear combinations of the gearbox 10, one of which gearwheels is designated 18 and engages with an associated pinion mounted on the countershaft 16 and designated 20. The gearwheel pair 18, 20 depicted in the drawings thus constitutes one of a plurality of gear combinations of the gearbox 10.
The lower gearwheels 20 etc. are kept immersed a few centimetres deep in oil in an oil sump 22 in the bottom portion of the gearbox housing 12 in order, during operation, to lubricate and cool the gearwheels 18, 20 of all the gear combinations. This immersion of the gearwheels causes splash losses when they rotate in the oil, which is also the case when direct drive is engaged in the gearbox, i.e. when power is transmitted directly between the input and output shafts at the transmission ratio 1 : 1 and there is therefore no load on the gearwheels of the gear combinations, which then do not need the lubrication and cooling which are required during operation with these gear combinations. In order to substantially reduce these splash losses when direct drive is engaged, the present invention proposes that the normal level Ni (Fig. 1) of the oil in the oil sump 22 be lowered to a level N2 (Fig. 3) which enables the lower pinions 20 etc. on the countershaft to rotate with, in principle, no contact with the oil in the sump 22, whereas the oil level is restored to the normal level Ni as soon as any of the gear combinations is engaged. To achieve this lowering of level advantageously from an energy point of view, it is proposed that when direct drive is engaged the lower gearwheels 20 etc. be used as conveying wheels to move oil up from the sump 22 to an adjacent tank 24 which has an inlet aperture 26 situated on the wall 28 of the housing 12 and exposed to oil splash during rotation of the gearwheels 20 in the direction illustrated in Fig. 2. To this end, a guide plate 30 may be suitably curved to facilitate the introduction of the oil into the tank 24. At the bottom of the tank 24 there is an outlet 32 which leads back to the tank 24, is situated above the free oil surface in the sump and has arranged in it an electrically operable valve 34 which can be kept open or closed depending on the respective operating situation. Alternatively, the outlet 32 may also be situated at a level below the free oil level in the sump 22 to lead oil accumulated in the tank 24 to the sump 22.
During operation with any of the gear combinations engaged in the gearbox 10, the valve 34 in the outlet 32 of the tank 24 is kept open so that the oil sprayed into the tank 24 can be led directly back to the sump 22 in order to maintain a correct oil level Ni therein. As soon as direct-drive operation is initiated, the valve 34 closes, whereupon the tank 24 begins to fill with the oil which the gearwheels 20 splash in via the inlet aperture 26 (see Fig. 2). The volume of the tank 24 is with advantage adapted, in principle, to the amount of oil which has to be transferred from the sump 22 to the tank 24 in order to lower the oil level to the level N2 at which the gearwheels 20 rotate with substantially no contact with the oil in the sump 22 (Fig. 3).
When thereafter a gear is engaged via any of the gear combinations of the gearbox, the valve 34 opens immediately in order to quickly restore the oil level Ni in the sump 22. To this end the valve 32 has a large outlet cross-section. To ensure trouble-free movement of oil back from the tank 24 to the sump 22 in cases where the outlet 32 is situated above the oil level in the sump 22, a shielding element 36 is arranged between the outlet 32 of the tank 24 and the lower gearwheels 20 etc. of the gear combinations.
The proposed embodiment of the gearbox according to the invention thus makes it possible, without supplying energy to, for example, an external oil pump, to temporarily lower the oil level while running in direct drive and hence reduce the splash losses in the gearbox.

Claims

Claims
1. A method for reducing the rotation resistance of gears (18, 20) in a gearbox (10) for a motor vehicle, which gearbox (10) comprises partly a plurality of pairs of mutually engaging gearwheels (18, 20) which constitute various gear combinations of the gearbox, and partly a direct drive between an input shaft and an output shaft of the gearbox, in which operating with gear combinations (18, 20) engaged entails maintaining in the gearbox (10) an oil level (N1) such that a peripheral portion of lower gearwheels (20) of the gear combinations is immersed in oil in an oil sump (22) of the gearbox, characterised in that when the direct drive is engaged the level (Ni) of the oil in the oil sump (22) is lowered to such an extent that the lower gearwheels (20) of the gear combinations will rotate with substantially no contact with the oil in the oil sump (22), and that upon resumption of operation with gear combinations the oil level is restored in the oil sump.
2. A method according to claim 1, characterised in that when the direct drive is engaged the oil level in the sump is lowered by the lower gearwheels (20) of the gear combinations being caused to propel oil into an adjacent oil gathering tank (24) with a closed outlet (32) leading back to the oil sump.
3. A method according to claim 2, characterised in that during operation with gear combinations engaged the outlet (32) of the tank (24) opens.
4. A gearbox comprising a housing (12) which supports partly a plurality of pairs of mutual engaging gearwheels (18, 20) which constitute various gear combinations of the gearbox (10), and partly a direct drive between an input shaft and an output shaft of the gearbox, with an oil sump (22) arranged in a lower portion of the housing (12), characterised in that the housing (12) has adjacent to it an oil gathering tank (24) which has not only an upper oil inlet (26) in the region (28) of the housing (12) which during operation of gear combinations of the gearbox is exposed to being splashed with oil by lower gearwheels (20) of gear combinations which are immersed in the oil sump (22), but also a lower outlet (32) for leading oil accumulated in the tank (24) back to the oil sump (22), which outlet (32) is closable during direct-drive operation in order to lower the oil level in the oil sump (22).
5. A gearbox according to claim 4, characterised in that the outlet (32) comprises a valve unit (34) controllable between an open and a closed state depending on the operating state of the gearbox.
6. A gearbox according to claim 4 or 5, characterised in that the outlet (32) leads into the oil sump (22) at a level above the normal oil level (N1) in the sump for gear-combination operation.
7. A gearbox according to any one of claims 4-6, characterised in that a guide plate (30) protruding into the gearbox housing (12) is adapted to guiding the oil splash from the lower gearwheels (20) of the gear combinations into the oil inlet (26) of the tank (24).
8. A gearbox according to claim 7, characterised in that the guide plate (30) has a curve reaching into the tank (24).
9. A gearbox according to any one of claims 6-8, characterised in that a shielding element (36) is arranged in the housing (12) between the tank outlet (32) and the lower gearwheels (20) of the gear combinations to ensure trouble-free feedback of oil from the tank (24) to the oil sump (22).
10. A gearbox according to any one of claims 4-9, characterised in that the tank (24) is configured as an integral part of the gearbox housing (12).
PCT/SE2007/050954 2006-12-18 2007-12-07 A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method WO2008076061A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602710-6 2006-12-18
SE0602710A SE530695C2 (en) 2006-12-18 2006-12-18 Method for reducing the rotational resistance of gears in a gearbox for motor vehicles, as well as gearbox for carrying out the method

Publications (1)

Publication Number Publication Date
WO2008076061A1 true WO2008076061A1 (en) 2008-06-26

Family

ID=39536565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/050954 WO2008076061A1 (en) 2006-12-18 2007-12-07 A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method

Country Status (2)

Country Link
SE (1) SE530695C2 (en)
WO (1) WO2008076061A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009034193A1 (en) * 2009-07-22 2011-02-03 Voith Patent Gmbh Turbo compound system for a drive device
WO2011126440A1 (en) * 2010-04-08 2011-10-13 Scania Cv Ab Lubrication system for a vehicle gearbox
CN102829168A (en) * 2011-06-16 2012-12-19 Zf腓德烈斯哈芬股份公司 Gear arrangement for rail vehicle
CN104251299A (en) * 2013-10-30 2014-12-31 莱州市盛乐机械有限公司 Liquid level adjusting oil tank for gearbox
DE102014107659A1 (en) 2014-05-30 2015-12-03 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Transmission for a motor vehicle
CN108474464A (en) * 2015-12-24 2018-08-31 爱信Ai株式会社 Oily receiver and method for manufacturing oily receiver
US10451170B2 (en) 2014-12-04 2019-10-22 Scania Cv Ab Lubrication system and a method for controlling the lubrication system
DE102019210966A1 (en) * 2019-07-24 2021-01-28 Zf Friedrichshafen Ag Device for cooling and lubricating a transmission for a vehicle
US20220003135A1 (en) * 2020-07-02 2022-01-06 Dana Italia S.R.L. Fluid sump for accommodating a lubricating fluid
DE102020210863A1 (en) 2020-08-28 2022-03-03 Zf Friedrichshafen Ag Oil supply system of a vehicle transmission
DE102021202522A1 (en) 2021-03-16 2022-09-22 Zf Friedrichshafen Ag Device for cooling and lubricating a transmission for a vehicle
EP4067145A1 (en) 2021-04-02 2022-10-05 Volvo Truck Corporation Electric powertrain for truck
FR3140412A1 (en) * 2022-10-04 2024-04-05 Psa Automobiles Sa MOTOR VEHICLE INCLUDING A LUBRICATED MECHANICAL REDUCTION SYSTEM
EP4375542A1 (en) * 2022-11-25 2024-05-29 Volvo Truck Corporation Control system for controlling an oil level in a gearbox of a vehicle, associated gearbox assembly and vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE534223C2 (en) 2009-10-29 2011-06-07 Scania Cv Ab transmission arrangement
CN105508583A (en) * 2016-03-01 2016-04-20 沃德传动（天津）股份有限公司 Speed reducer and bearing lubricating structure thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191120288A (en) * 1911-09-13 1912-06-27 Wolseley Tool And Motor Car Co Improved Means for use in the Lubrication of Change Speed Gear, and other Driving Mechanism, used with Automobiles.
US5411116A (en) * 1994-06-22 1995-05-02 United Technologies Corporation Self-scavenging, hybrid lubrication subsystem
US5505112A (en) * 1994-02-18 1996-04-09 Eaton Corporation Churning loss reduction means for gear type devices
JP2001220109A (en) * 2000-02-10 2001-08-14 Mitsubishi Gas Chem Co Inc Method of reducing carbon monoxide in hydrogen- containing gas and catalyst

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191120288A (en) * 1911-09-13 1912-06-27 Wolseley Tool And Motor Car Co Improved Means for use in the Lubrication of Change Speed Gear, and other Driving Mechanism, used with Automobiles.
US5505112A (en) * 1994-02-18 1996-04-09 Eaton Corporation Churning loss reduction means for gear type devices
US5411116A (en) * 1994-06-22 1995-05-02 United Technologies Corporation Self-scavenging, hybrid lubrication subsystem
JP2001220109A (en) * 2000-02-10 2001-08-14 Mitsubishi Gas Chem Co Inc Method of reducing carbon monoxide in hydrogen- containing gas and catalyst

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009034193A1 (en) * 2009-07-22 2011-02-03 Voith Patent Gmbh Turbo compound system for a drive device
WO2011126440A1 (en) * 2010-04-08 2011-10-13 Scania Cv Ab Lubrication system for a vehicle gearbox
CN102829168A (en) * 2011-06-16 2012-12-19 Zf腓德烈斯哈芬股份公司 Gear arrangement for rail vehicle
CN102829168B (en) * 2011-06-16 2016-08-10 Zf腓德烈斯哈芬股份公司 Actuator system for rail vehicle
CN104251299A (en) * 2013-10-30 2014-12-31 莱州市盛乐机械有限公司 Liquid level adjusting oil tank for gearbox
DE102014107659A1 (en) 2014-05-30 2015-12-03 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Transmission for a motor vehicle
EP2977647A2 (en) 2014-05-30 2016-01-27 GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG Transmission for a motor vehicle
US9739363B2 (en) 2014-05-30 2017-08-22 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Gearbox for a motor vehicle
US10451170B2 (en) 2014-12-04 2019-10-22 Scania Cv Ab Lubrication system and a method for controlling the lubrication system
CN108474464B (en) * 2015-12-24 2020-12-11 爱信艾达株式会社 Oil receptacle and method for producing an oil receptacle
CN108474464A (en) * 2015-12-24 2018-08-31 爱信Ai株式会社 Oily receiver and method for manufacturing oily receiver
DE102019210966A1 (en) * 2019-07-24 2021-01-28 Zf Friedrichshafen Ag Device for cooling and lubricating a transmission for a vehicle
US20220003135A1 (en) * 2020-07-02 2022-01-06 Dana Italia S.R.L. Fluid sump for accommodating a lubricating fluid
US11933205B2 (en) * 2020-07-02 2024-03-19 Dana Italia S.R.L. Fluid sump for accommodating a lubricating fluid
DE102020210863A1 (en) 2020-08-28 2022-03-03 Zf Friedrichshafen Ag Oil supply system of a vehicle transmission
DE102021202522A1 (en) 2021-03-16 2022-09-22 Zf Friedrichshafen Ag Device for cooling and lubricating a transmission for a vehicle
EP4067145A1 (en) 2021-04-02 2022-10-05 Volvo Truck Corporation Electric powertrain for truck
US11725722B2 (en) 2021-04-02 2023-08-15 Volvo Truck Corporation Electric powertrain for truck
FR3140412A1 (en) * 2022-10-04 2024-04-05 Psa Automobiles Sa MOTOR VEHICLE INCLUDING A LUBRICATED MECHANICAL REDUCTION SYSTEM
EP4375542A1 (en) * 2022-11-25 2024-05-29 Volvo Truck Corporation Control system for controlling an oil level in a gearbox of a vehicle, associated gearbox assembly and vehicle

Also Published As

Publication number Publication date
SE0602710L (en) 2008-06-19
SE530695C2 (en) 2008-08-19

Similar Documents

Publication Publication Date Title
WO2008076061A1 (en) A method to reduce the rotary resistance at gear wheels of a gear box at a motor vehicle, and a gear box to carry out the method
US10859152B2 (en) Pure electric vehicle transmission with novel lubrication structure
DE10051356B4 (en) Transmission for a reciprocating internal combustion engine
CN103133670B (en) For commercial Application or the actuating device of wind power plant
DE102005013657A1 (en) Gearwheel drive for motor vehicles has controlled oil supply by using transmission sensors for determining operating parameters for effective volume flow
US20110245009A1 (en) Power transmission device
CN107314100A (en) A kind of pure electric automobile speed changer with novel lubricating structure
CN207848373U (en) A kind of pure electric automobile speed changer with novel lubricating structure
JP2009108977A (en) Oil suction device
DE102007029469B4 (en) Wind turbine gearbox and method for its oil supply
CN108286603B (en) Upper transmission case of excavator
CN103953723A (en) Automatic oil supplying device for oil field speed reducer
CN110701287B (en) Marine gear box oil sump lubricating system
CN209511014U (en) A kind of Self-lubricating gear case
CN207906406U (en) Novel upper transmission box of excavator
CN109854679B (en) Self-lubricating gear box
CN113124141B (en) Gearbox lubrication method
JP2010071327A (en) Transmission
CN211175236U (en) High-rotating-speed transverse single-stage reduction gearbox with bearing lubricating structure
CN207880043U (en) Prevent being emptied structure in wind power speed-increasing gearbox mechanical pump lubrication system
CN203082160U (en) Large-power gear speed regulation device
CN203784258U (en) Automatic oil supply device of oilfield speed reducer
CN103115129A (en) High-power gear speed regulating device
US2723002A (en) Gear box lubricating means
CN205534169U (en) Take acceleration rate force -feed lubrication's speed reducer

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07852226

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07852226

Country of ref document: EP

Kind code of ref document: A1