CA1211384A - Oil-lubricating system for gearboxes - Google Patents
Oil-lubricating system for gearboxesInfo
- Publication number
- CA1211384A CA1211384A CA000435486A CA435486A CA1211384A CA 1211384 A CA1211384 A CA 1211384A CA 000435486 A CA000435486 A CA 000435486A CA 435486 A CA435486 A CA 435486A CA 1211384 A CA1211384 A CA 1211384A
- Authority
- CA
- Canada
- Prior art keywords
- oil
- pump
- gearbox shaft
- gearbox
- shaft
- 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
-
- 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
- F16H57/0427—Guidance of lubricant on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
-
- 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
- F16H57/0018—Shaft assemblies for gearings
- F16H57/0037—Special features of coaxial shafts, e.g. relative support thereof
-
- 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
- F16H57/042—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
- F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
-
- 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
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
-
- 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
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to an oil-lubricating system which is intended to provide a lubricating point in the in-terior of a rotating gearbox shaft with sufficient lubricat-ing oil. To this end a centrifugal pump is arranged upon the rotating gearbox shaft. Oil is supplied to the pump from an oil-collecting pocket located in the upper part of the gearbox and is passed, by an impeller, into a rotating oil ring. The pressure in the latter is transferred, through stationary guide channels in the housing, into an annular collecting groove in the peripheral surface of the gearbox shaft, whence the oil is forced, through a channel into the interior of the gearbox shaft.
The invention relates to an oil-lubricating system which is intended to provide a lubricating point in the in-terior of a rotating gearbox shaft with sufficient lubricat-ing oil. To this end a centrifugal pump is arranged upon the rotating gearbox shaft. Oil is supplied to the pump from an oil-collecting pocket located in the upper part of the gearbox and is passed, by an impeller, into a rotating oil ring. The pressure in the latter is transferred, through stationary guide channels in the housing, into an annular collecting groove in the peripheral surface of the gearbox shaft, whence the oil is forced, through a channel into the interior of the gearbox shaft.
Description
~ILZ~313~
The invention relates to an oil-lubricating system for gearboxes. More specifically, the invention relates to an oil-lubricating system which is intended to provide a lubricating point in the interior of a rotating gearbox shaft with sufficient lubri.cating oil.
By means of an oil-lubricating system of this kind, disclosed in German AS 27 33 294, specific points re~uiring lubrication,.for example, gears which are difficult to supply with sufficient oil, are to be uniformly lubricated even under extreme driving conditions.
Other locations which are difficult -to supply with lubricating oil are bearing supports in rotating gearbox shafts in which other shafts are mounted~ It is known to pass oil collected in pockets, through bores, directly in-to the interior of a shaft. However, this oil can flow into the interior only when the shaft is stationary since, when the shaft is rotating, the centrifugal force acting upon the oil is too largen Where the gearbox is in continuous operation, with only brief stops, adequate lubrication of the bearing supports is not assured.
It is the purpose of the invention to provide an oil-lubricating system for gearboxes which will provide ade~uate lubrication for bearing supports within rotating gearbox shaf-ts, without substantially increasing the size of the gearbox. The oil~lubricating system is also to be simple and ine~pensive in assembly and manufacture and to consume littl~ power.
In accordance with the invention there is provided an oil--lubricati.ng system for gearboxes, which system includes at least one oil-collecting pocket and an annular collecting groove open towards the peripheral surface of a rotating gear-box shaft for lubricant supplied by a pump arranged upon the $3~
~2~389L
!
gearbox sha~t. Radial channels are associated wi-th the pump.
The suction point communicates with the oil-collectiny pocket and at least one channel runs from the annular collecting groove in the interior o~ the gearbox to at least one point to be lubricated arranged in the interior of the gearbox shaft. In accordance with the invention, the pump is in the form of a centrifugal pump and contains a .substantially disc-shaped impeller provided with vanes and the radial channels are in the form of guide-channels, which run ~rom the pressurized oil-collecting area, and are arranged radially outwardly upon the centrifugal pump. In addition, the guide channels are integral with the housing, run radially inwardly, and communicate with the annular collecting groove.
The guide-channels in the housing make it possible to displace the point at which the oil is delivered fxom the outer periphery of the centrifugal pump to the outer periphery of the rotating shaft. In this way, the pressure produced by the centrifugal pump is sufficient to allow oil to enter the interior of the gearbox shaft against centri~ugal force.
The design of the centrifugal-pump impeller is disc-shaped, and the disc-shaped ~esign of the centrifugal-pump impeller provides a lubricating device of small axial dimen-sions. Axial openings in the impeller provide a component which is pressure-compensated in the axial direction. This eliminates the need for costly axial bearings ~or the impeller and also keeps the axial dimensions of the device small. The impeller is preferably made without machining, i.e. as a die-casting or a stamped sheet-metal part.
The invention is explained hereinafter in greater detail in conjunction with the exemplary embodiment illus-trated in the drawings attached hereto, wherein:
Figure 1 shows a cross-section through a gearbox comprising the oil-lubricating sys~em according ~o
The invention relates to an oil-lubricating system for gearboxes. More specifically, the invention relates to an oil-lubricating system which is intended to provide a lubricating point in the interior of a rotating gearbox shaft with sufficient lubri.cating oil.
By means of an oil-lubricating system of this kind, disclosed in German AS 27 33 294, specific points re~uiring lubrication,.for example, gears which are difficult to supply with sufficient oil, are to be uniformly lubricated even under extreme driving conditions.
Other locations which are difficult -to supply with lubricating oil are bearing supports in rotating gearbox shafts in which other shafts are mounted~ It is known to pass oil collected in pockets, through bores, directly in-to the interior of a shaft. However, this oil can flow into the interior only when the shaft is stationary since, when the shaft is rotating, the centrifugal force acting upon the oil is too largen Where the gearbox is in continuous operation, with only brief stops, adequate lubrication of the bearing supports is not assured.
It is the purpose of the invention to provide an oil-lubricating system for gearboxes which will provide ade~uate lubrication for bearing supports within rotating gearbox shaf-ts, without substantially increasing the size of the gearbox. The oil~lubricating system is also to be simple and ine~pensive in assembly and manufacture and to consume littl~ power.
In accordance with the invention there is provided an oil--lubricati.ng system for gearboxes, which system includes at least one oil-collecting pocket and an annular collecting groove open towards the peripheral surface of a rotating gear-box shaft for lubricant supplied by a pump arranged upon the $3~
~2~389L
!
gearbox sha~t. Radial channels are associated wi-th the pump.
The suction point communicates with the oil-collectiny pocket and at least one channel runs from the annular collecting groove in the interior o~ the gearbox to at least one point to be lubricated arranged in the interior of the gearbox shaft. In accordance with the invention, the pump is in the form of a centrifugal pump and contains a .substantially disc-shaped impeller provided with vanes and the radial channels are in the form of guide-channels, which run ~rom the pressurized oil-collecting area, and are arranged radially outwardly upon the centrifugal pump. In addition, the guide channels are integral with the housing, run radially inwardly, and communicate with the annular collecting groove.
The guide-channels in the housing make it possible to displace the point at which the oil is delivered fxom the outer periphery of the centrifugal pump to the outer periphery of the rotating shaft. In this way, the pressure produced by the centrifugal pump is sufficient to allow oil to enter the interior of the gearbox shaft against centri~ugal force.
The design of the centrifugal-pump impeller is disc-shaped, and the disc-shaped ~esign of the centrifugal-pump impeller provides a lubricating device of small axial dimen-sions. Axial openings in the impeller provide a component which is pressure-compensated in the axial direction. This eliminates the need for costly axial bearings ~or the impeller and also keeps the axial dimensions of the device small. The impeller is preferably made without machining, i.e. as a die-casting or a stamped sheet-metal part.
The invention is explained hereinafter in greater detail in conjunction with the exemplary embodiment illus-trated in the drawings attached hereto, wherein:
Figure 1 shows a cross-section through a gearbox comprising the oil-lubricating sys~em according ~o
- 2 -" ~Z1~38~
the invention, Figure 2 is a cross-sec-tion through II-II o~ the gearbox in Figure 1, and Figure 3 is a cross-section through III-III of the gearbox in Figure 1.
A gearbox shaft 1 is mounted rotatably in a gear~
box housing 2 by means of a bearing 3. Gears 4 and 5 are arranged on the said shaft.
Mounted within gearbox shaft 1, by means of a bear-ing 7, is a further gearbox shaft 6 carrying a gear 8..Shafts 1 and 6 are rotatable in relation to each other.
Bearing 7 comprises point 9 which is to be lubri-cated and which is located in the interior of rotating gear-box shaft 1. Such a point could heretofore be lubricated, only when the drive-shaft was stationary, except at great expense. In order to ensure adequate lubrication, a centrifu-gal pump 10 is arranged upon gearbox shaft 1. The centrifugal pump contains an impeller 11, a guide-member 12 and a cover-plate 13~ Impeller 11 is secured against rotation in rela-tion to gearbox shaft 1, while guide-member 12 and cover-plate 13 are secured to the gearbox housing.
Impeller 11 is of substantially disc-shaped design and carries vanes 14 on one side. The said impeller runs in a stationary ch~mber 15 which is defined axially, on the one hand by a smooth wall of gearbox housing 2 and, on the other hand, by substantially flat cover-plate 13. The impeller also comprises axial openings 16 at various locations~ In the case of an impeller in the form of a stamped sheet-metal part, each vane 14 has an opening 16. If a different produc-tion process is used, for example die-casting, the openings, which provide axial pressure-equalization for the impeller, may also be located elsewhere. The impeller is designed, in relation to chamber 15, in such a manner that it does not L38fl~
Axial openings 17 are provided at khe outer periphery of chamber 15 in cover-plate 13. The openings provide a con-nection between the pressurized-oil collecting chamber formed at this point in chamber 15 and the guide-channels 18 arranged in guide-member 12. Channels 18 run radially inwards and are preferably curved. Located at the radially inward ends of guide channels 18 is an annular collecting groove l9 which is open towards the peripheral surface of gearbox shaft 1 and com-municates through at least one channel 20 with an axi~l bore21 arranged in the interior of the said gearbox shaft. The said annular collecting ring may be located in the gearbox shaft or in the guide-member.
Located in what is normally the upper part of gear-box housing 3 is an oil-collecting pocket 22 which communi~
cates, through at least one collecting channel 23 arranged in guide-member 12, and an axial opening 24 in cover-plate 13, with a suction-point 25 of centrifugal pump lO, the said suction-point being arranged at a radially inner loca-tion in charnber 15.
The oil-lubrication system operates as follows: oil sprayed into gearbox housing 3 is collected in oil-collecting pocket 22 and is passed to centrifugal-pump suction-point 25. The oil is brought up to the rotational speed of the shaft by rotating impeller ll. The pressure achieved in the oil-ring rotating with the impeller is a function of the rotational speed of the shaft and the dimensions of the impeller. The oil-pressure is trans~erred to annular collect-ing ring l9 by guide~channels 18 arranged in guide~member 12.
This pressure forces the oil into the interior of gearbox shaft l against the centrifugal forceO
This arrangement of the oil-lubricating system ~ ~ ~ Al ~Z~L~8~
makes it possible to use a centrifugal pump having only three parts, all of which may be produced, without machining, in the foxm of sheet-metal st~npings ox die-castings. Since the p~np has no parts which come iIltO contact with each other as it rotates, there is no wear and no danger of fretting.
Although a particular embodiment has been described, this was for the purpose of illustrating, buk not limiting the invention. Various modifications which will come readily to the mind of one skilled in the art are within the scope of the invention as defined in the appended claims.
the invention, Figure 2 is a cross-sec-tion through II-II o~ the gearbox in Figure 1, and Figure 3 is a cross-section through III-III of the gearbox in Figure 1.
A gearbox shaft 1 is mounted rotatably in a gear~
box housing 2 by means of a bearing 3. Gears 4 and 5 are arranged on the said shaft.
Mounted within gearbox shaft 1, by means of a bear-ing 7, is a further gearbox shaft 6 carrying a gear 8..Shafts 1 and 6 are rotatable in relation to each other.
Bearing 7 comprises point 9 which is to be lubri-cated and which is located in the interior of rotating gear-box shaft 1. Such a point could heretofore be lubricated, only when the drive-shaft was stationary, except at great expense. In order to ensure adequate lubrication, a centrifu-gal pump 10 is arranged upon gearbox shaft 1. The centrifugal pump contains an impeller 11, a guide-member 12 and a cover-plate 13~ Impeller 11 is secured against rotation in rela-tion to gearbox shaft 1, while guide-member 12 and cover-plate 13 are secured to the gearbox housing.
Impeller 11 is of substantially disc-shaped design and carries vanes 14 on one side. The said impeller runs in a stationary ch~mber 15 which is defined axially, on the one hand by a smooth wall of gearbox housing 2 and, on the other hand, by substantially flat cover-plate 13. The impeller also comprises axial openings 16 at various locations~ In the case of an impeller in the form of a stamped sheet-metal part, each vane 14 has an opening 16. If a different produc-tion process is used, for example die-casting, the openings, which provide axial pressure-equalization for the impeller, may also be located elsewhere. The impeller is designed, in relation to chamber 15, in such a manner that it does not L38fl~
Axial openings 17 are provided at khe outer periphery of chamber 15 in cover-plate 13. The openings provide a con-nection between the pressurized-oil collecting chamber formed at this point in chamber 15 and the guide-channels 18 arranged in guide-member 12. Channels 18 run radially inwards and are preferably curved. Located at the radially inward ends of guide channels 18 is an annular collecting groove l9 which is open towards the peripheral surface of gearbox shaft 1 and com-municates through at least one channel 20 with an axi~l bore21 arranged in the interior of the said gearbox shaft. The said annular collecting ring may be located in the gearbox shaft or in the guide-member.
Located in what is normally the upper part of gear-box housing 3 is an oil-collecting pocket 22 which communi~
cates, through at least one collecting channel 23 arranged in guide-member 12, and an axial opening 24 in cover-plate 13, with a suction-point 25 of centrifugal pump lO, the said suction-point being arranged at a radially inner loca-tion in charnber 15.
The oil-lubrication system operates as follows: oil sprayed into gearbox housing 3 is collected in oil-collecting pocket 22 and is passed to centrifugal-pump suction-point 25. The oil is brought up to the rotational speed of the shaft by rotating impeller ll. The pressure achieved in the oil-ring rotating with the impeller is a function of the rotational speed of the shaft and the dimensions of the impeller. The oil-pressure is trans~erred to annular collect-ing ring l9 by guide~channels 18 arranged in guide~member 12.
This pressure forces the oil into the interior of gearbox shaft l against the centrifugal forceO
This arrangement of the oil-lubricating system ~ ~ ~ Al ~Z~L~8~
makes it possible to use a centrifugal pump having only three parts, all of which may be produced, without machining, in the foxm of sheet-metal st~npings ox die-castings. Since the p~np has no parts which come iIltO contact with each other as it rotates, there is no wear and no danger of fretting.
Although a particular embodiment has been described, this was for the purpose of illustrating, buk not limiting the invention. Various modifications which will come readily to the mind of one skilled in the art are within the scope of the invention as defined in the appended claims.
Claims (2)
1. An oil-lubricating system for gearboxes, said system comprising at least one oil-collecting pocket and an annular collecting groove, open towards the peripheral surface of a rotating gearbox shaft, for lubricant supplied by a pump arranged upon the gearbox shaft, radial channels being assoc-iated with said pump, the suction-point thereof communicating with said oil-collecting pocket, and at least one channel running from said annular collecting groove, in the interior of the gearbox shaft, to at least one point to be lubricated arranged in the interior of said gearbox shaft, characterized in that; the pump is in the form of a centrifugal pump and contains a substantially disc-shaped impeller provided with vanes; and the radial channels are in the form of guide-channels, which run from a pressurized oil-collecting area, are arranged radially outwardly upon the centrifugal pump, are integral with the housing, run radially inwardly, and communicate with said annular collecting groove.
2. An oil-lubricating system according to claim 1, characterized in that the impeller comprises axial openings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3238780.6-12 | 1982-10-20 | ||
| DE19823238780 DE3238780C1 (en) | 1982-10-20 | 1982-10-20 | Oil lubricating system for transmissions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1211384A true CA1211384A (en) | 1986-09-16 |
Family
ID=6176130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000435486A Expired CA1211384A (en) | 1982-10-20 | 1983-08-26 | Oil-lubricating system for gearboxes |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1211384A (en) |
| DE (1) | DE3238780C1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998600A (en) * | 1988-03-09 | 1991-03-12 | Zahnradfabrik Friedrichshafen Ag | Oil lubrication system for the bearing of a shaft journal |
| US7810404B2 (en) | 2006-07-03 | 2010-10-12 | Aichi Machine Industry Co., Ltd. | Synchronizing mechanism and transmission having the same |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3517042A1 (en) * | 1985-05-11 | 1986-11-13 | Mannesmann AG, 4000 Düsseldorf | GEAR FOR A GEARBOX |
| DE3907154A1 (en) * | 1988-03-09 | 1989-09-21 | Zahnradfabrik Friedrichshafen | Oil-lubricating system for the bearing arrangement of a shaft journal in a rotating shaft |
| DE4242762A1 (en) * | 1992-12-17 | 1994-06-23 | Orenstein & Koppel Ag | Work type transmission system for e.g. escalators |
| DE19501799C2 (en) * | 1995-01-21 | 2003-08-21 | Zahnradfabrik Friedrichshafen | Oil lubrication system for a transmission |
| DE19849237C2 (en) | 1998-10-26 | 2002-02-28 | Kone Corp | Sealing system for a drive unit consisting of motor and gear |
| DE19857221B4 (en) * | 1998-12-11 | 2010-02-11 | Zf Friedrichshafen Ag | Gear shift transmission |
| US6991574B2 (en) * | 2004-01-08 | 2006-01-31 | Arvinmeritor Technology, Llc | Dual level oil impeller for drive axle assembly |
| DE102004018226B4 (en) * | 2004-04-15 | 2011-07-28 | ZF Friedrichshafen AG, 88046 | Device for oil supply of shafts, which identify an axially extending bore or oil passage |
| DE102004031470A1 (en) * | 2004-06-30 | 2006-01-26 | Zf Friedrichshafen Ag | Oil supply |
| DE102004031471A1 (en) * | 2004-06-30 | 2006-01-26 | Zf Friedrichshafen Ag | Oil supply |
| DE102005059115A1 (en) * | 2005-12-10 | 2007-06-14 | Zf Friedrichshafen Ag | Oil lubricating system for e.g. dual clutch, has shaft sealing ring arranged between housing cover and drive hub, and collecting and guiding plate arranged in axial gap provided between housing cover and coupling cage |
| DE102006017386A1 (en) * | 2006-04-11 | 2007-10-18 | Fev Motorentechnik Gmbh | Internal combustion engine, has crank drive, at which oil collecting passage is arranged, and oil feed running from storage space to piston rod roller bearing and flowing into area of oil lubrication of bearing |
| DE102007004714A1 (en) | 2007-01-31 | 2008-08-07 | Schaeffler Kg | Bearing arrangement for e.g. planetary gear, has bearing flange with inner ring and outer ring, where each ring is formed as tracks for bearing, and rings arranged such that tracks run concentrically together |
| DE102007044518A1 (en) | 2007-09-18 | 2009-03-19 | Zf Friedrichshafen Ag | Rotary feedthrough for oil supply of an axially extending bore or oil passage having shaft of a transmission |
| CN109826942B (en) * | 2019-03-05 | 2021-01-15 | 凯博易控驱动(苏州)股份有限公司 | Planetary gear train bearing lubricating structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB952414A (en) * | 1962-01-08 | 1964-03-18 | Vauxhall Motors Ltd | Motor vehicle gearbox and pump |
| DD127107A1 (en) * | 1976-07-27 | 1977-09-07 |
-
1982
- 1982-10-20 DE DE19823238780 patent/DE3238780C1/en not_active Expired
-
1983
- 1983-08-26 CA CA000435486A patent/CA1211384A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998600A (en) * | 1988-03-09 | 1991-03-12 | Zahnradfabrik Friedrichshafen Ag | Oil lubrication system for the bearing of a shaft journal |
| US7810404B2 (en) | 2006-07-03 | 2010-10-12 | Aichi Machine Industry Co., Ltd. | Synchronizing mechanism and transmission having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3238780C1 (en) | 1984-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |