GB2506509A - Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct - Google Patents

Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct Download PDF

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Publication number
GB2506509A
GB2506509A GB1314150.2A GB201314150A GB2506509A GB 2506509 A GB2506509 A GB 2506509A GB 201314150 A GB201314150 A GB 201314150A GB 2506509 A GB2506509 A GB 2506509A
Authority
GB
United Kingdom
Prior art keywords
lubricant
filter
housing
gear
oil
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.)
Withdrawn
Application number
GB1314150.2A
Other versions
GB201314150D0 (en
Inventor
Mark L Dicea
Philip J Kowalske
Juergen Roth
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Priority to GB1314150.2A priority Critical patent/GB2506509A/en
Publication of GB201314150D0 publication Critical patent/GB201314150D0/en
Publication of GB2506509A publication Critical patent/GB2506509A/en
Withdrawn legal-status Critical Current

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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
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F16H57/0483—Axle or inter-axle differentials
    • 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
    • F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
    • F16H57/0404—Lubricant filters
    • 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
    • F16H57/0457—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
    • F16N—LUBRICATING
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration

Landscapes

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

Abstract

A lubricant filtration device 18 for a gear 10, preferably of a vehicle differential, the lubricant filtration device 18 comprising: at least one housing 12 of the gear 10; at least one catching element 20 attached inside the housing 12, the catching element 20 being capable of catching lubricant swirled up by the rotating gear (16, fig 8); at least one filter 30 for filtering the lubricant, the filter 30 being separate from the catching element 20 and arranged, preferably at least 130mm, vertically below the catching element 20 and preferably outside the housing; and at least one duct 42 for guiding the lubricant caught by the catching element 20 to the filter 30, the flow of the lubricant from the catching element 20 via the duct 42 to the filter 30 being effected by gravity. A second duct 46 may return the filtered lubricant to the housing 12.

Description

Lubricant Filtration Device for a Gear of a Vehicle The invention relates to a lubricant filtration device for a gear of a vehicle.
Lubricant filtration devices for gears of vehicles are well known from the general prior art.
Such a lubricant filtration device comprises, for example, at least one filter element for filtering a lubricant. For example, the lubricant is oil which serves for cooling and lubricating at least one gear element of the gear, the gear element being rotatable about a rotation axis. For example, the gear element can be a gear wheel or a shaft or the like.
For example, the gear comprises at least one housing element bounding a receiving space in which the gear element is arranged at least partly. The gear element is rotatable about the rotation axis in relation to the housing.
Conventionally, the lubricant filtration device also comprises at least one pump by means of which the lubricant (oil) is pumped or transported to the filter element. Additionally or alternatively, such a pump can be used to pump or transport the lubricant from the filter element back to the receiving space so that the lubricant filtered by the filter element can be used again for lubricating and cooling the gear element.
The use of a pump to transport the lubricant leads to a high weight and high cost of the lubricant filtration device.
From DE 102011 012 968 Al a gear, in particular, an axle gear or differential for a motor vehicle is known. The gear comprises a housing element bounding a receiving space at least partly. The gear comprises at least one gear element which is arranged in the receiving space, the gear element being rotatable about a rotation axis in relation to the housing element. The gear element is lubricated by a lubricant which can be received in the receiving space.
The gear also comprises a filter device for filtering the lubricant. The filter device comprises at least one catching container which is fixed in relation to the housing element and arranged in the receiving space at least partly. By means of the catching container lubricant swirled up by the rotating gear element can be caught and filtered via the filter opening. Gears, in particular, axle gears comprising lubricant filtration devices are also known from DE 696 11 872 T2 and DE 694 02 538 T2.
It is an object of the present invention to provide a lubricant filtration device which has a particularly low weight, can be manufactured in a particularly cost-efficient way and can filter lubricant very effectively.
This object is solved by a lubricant filtration device having the features of patent claim 1.
Advantageous embodiments with expedient and non-trivial developments of the invention are indicated in the other patent claims.
The lubricant filtration device for a gear of a vehicle according to the present invention comprises at least one housing element of the gear, the housing element bounding a receiving space for at least one gear element of the gear at least partly. The gear element can be arranged in the receiving space at least partly.
The lubricant filtration device also comprises at least one catching element attached to the housing inside the receiving space, the catching element being capable of catching lubricant swirled up by the rotating gear element. With regard to an assembled state of the gear and the lubricant filtration device, the gear element is rotatably arranged in the receiving space at least partly about a rotation axis. When the gear element rotates, the gear element swirls up lubricant, for example, in the form of oil, wherein the swirled up lubricant can be caught or captured by the catching element at least partly.
The lubricant filtration device also comprises at least one filter element for filtering the lubricant. The filter element is separate from the catching element. This means that the filter element is used additionally with regard to the catching element, wherein the filter element is arranged at a distance from the catching element. In other words, the catching element is a first component of the lubricant filtration device and the filter element is an additional second component of the lubricant filtration device, so that the catching element and the filter element are, for example, manufactured separately from each other. The filter element is arranged below the catching element in the vertical direction of the vehicle.
Moreover, the lubricant filtration device comprises at least one duct element for guiding the lubricant caught by the catching element to the filter element, the flow of the lubricant from the catching element via the duct element to the filter element being effected by gravity. Thereby, pumps for transporting the lubricant having lubricated the gear element are not necessary. Hence, the number of parts, the weight and the cost of the lubricant filtration system can be kept particularly low. Utilizing the lubricant filtration system results in a better lubricant quality for a longer period of time, longer bearing and seal life, fewer failures, and ultimately lower cost since impurities in the lubricant can be filtered very effectively by the filter element.
Further advantages, features, and details of the invention derive from the following description of preferred embodiments as well as from the drawing. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respective indicated combination but also in any other combination or taken alone without leaving the scope of the invention.
The drawing shows in: Fig. 1 part of a schematic and perspective view of a gear in the form of a axle gear of a vehicle, the axle gear comprising a first embodiment of a lubricant filtration system according to the present invention; Fig. 2 part of a schematic and perspective view of the axle gear comprising a second embodiment of the lubricant filtration device according to the present invention; Fig. 3 part of a schematic sectional view of a housing of the axle gear and the lubricant filtration system; Fig. 4 part of a further schematic sectional view of the housing; Fig. 5 a schematic top view of a mounting ring of the lubricant filtration system; Fig. 6 a schematic side view of the mounting ring; Fig. 7 a schematic perspective view of the mounting ring; Fig. 8 a schematic top view of the axle gear; Fig. 9 a schematic view of the axle gear form its bottom side; Fig. 10 a schematic sectional view of the axle gear; Fig. 11 a schematic front view of a catching element of the lubricant filtration device; Fig. 12 Fig. 12 a schematic side view of the catching element; Fig. 13 Fig. 13 a schematic top view of the catching element; Fig. 14 Fig. 14 a schematic top view of an oil filter housing of the lubricant filtration device; Fig. 15 Fig. 15 shows a schematic sectional view of the oil filter housing along cut line A-A shown in Fig. 14; and Fig. 16 Fig. 16 a further schematic sectional view of the oil filter housing along a cut line B-B shown in Fig. 14.
In the figures the same elements or elements having the same function are equipped with the same reference sign.
Fig. 1 shows a gear in the form of an axle gear 10 for a vehicle, in particular, a motor vehicle. As can be seen from an overall view of Figs. 1,3,4 and 8, the axle gear 10 comprises at least one housing element 12. The housing element 12 bounds a receiving space 14 at least partly. The axle gear 10 also comprises a gear element in the form of a ring gear 16. The ring gear 16 is arranged at least partly in the receiving space 14, wherein the ring gear 16 is held rotatably about a rotation axis so that the ring gear 16 can rotate about the rotation axis in relation to the housing element 12. For cooling and/or lubricating the ring gear 16 during operation, a lubricant in the form of oil is used. The lubricant can be received in the receiving space 14 so that a reservoir of the lubricant is received inside the receiving space 14. During operation, the ring gear 16 splashes in the lubricant reservoir so that it swirls up lubricant (oil).
The axle gear 10 also comprises a lubricant filtration device 18 for filtering the oil (lubricant). Fig. 1 shows the lubricant filtration device 18 according to a first embodiment.
Fig. 2 shows the lubricant filtration device 18 according to a second embodiment. For this purpose, the housing element 12 is a component of the lubricant filtration device. In other words, the lubricant filtration device 18 comprises the housing element 12. Moreover, the lubricant filtration device 18 further comprises at least one catching element in the form of an oil catcher 20 which is attached to the housing element 12 inside the receiving space 14. As can be seen from Figs. 3 and 4, the oil catcher 20 is attached to an inner surface 22 of the housing 12, the inner surface 22 bounding the receiving space 14 at least partly.
Advantageously, the oil catcher 20 is funnel-shaped. The oil catcher 20 is formed in one piece and made out of sheet metal and formed to catch the lubricant swirled up by the ring gear 16. An outer surface 23 of the housing element 12 can be seen, the outer surface 23 facing away from and opposite to the inner surface 22.
As can be seen from Fig. 4, the housing element 12 has at least one through opening 24 of the lubricant filtration device 18. As indicated by directional arrows in Fig. 4, the oil swirled up by the ring gear 16 and caught by the oil catcher 20 can flow through the through opening 24. The oil catcher 20 is formed to funnel the caught or captured oil to the through opening 24 which is an axle housing cover outlet.
For example, the through opening 24 is a drilled and tapped 1/-NPT hole (NPT -national pipe thread) in the housing element 12 and positioned in a proper location to best catch and/or capture the oil of the ring gear swirl. The location of the through opening 24 can also be seen from Figs. 8 and 9. The oil catcher 20 is, for example, welded on the inner surface 22 of the housing element 12 using the 1/4-NPT hole (through opening 24) as a locator so that the oil captured by the oil catcher 20 will funnel out of the through opening 24.
As can be seen from Figs. 1 and 2, the lubricant filtration device 18 further comprises a filter device 26 having a filter housing in the form of an oil filter housing 28 and a filter element in the form of an oil filter 30. According to the second embodiment, the filter device 26 also has a fastening element in the form of a mounting ring 32.
The oil catcher 20 and the oil filter 30 are designed as separately manufactured components, wherein the oil filter 30 is separate or arranged at a distance from the oil catcher 20. Moreover, the filter device 26, in particular, the oil filter 30 is arranged outside the receiving space 14 and outside the housing element 12, the filter device 26 being attached to the housing element 12. The design of the oil catcher 20 can be seen from Figs. 11 to 13. The position of the filter device 26 in relation to the oil catcher 20 can be seen in Fig. 10. The oil filter housing 28 can be made of aluminium so that it has a particularly low weight.
As can be seen from Figs 1, 2, 10 and 15, the oil filter housing 28 is a vertical design that uses standard automotive oil filters. The oil filter housing 28 has a special reservoir feature in the form of an oil filter housing reservoir 34 which is, for example, machined into the oil filter housing 28 and utilizes gravity to fill the oil filter 30 and create oil flow. As can be seen from Figs. 1, 2 and 10, the filter device 26, in particular, the oil filter housing 28 and the oil filter 30 are arranged below the oil catcher 20 in the vertical direction of the vehicle so that a flow of the oil from the through opening 24 to the oil filter 30 can be effected by gravity solely.
A through opening 36 which is formed as, for example, a drilled and tapped 1/4-NPT hole in the top of the oil filter housing 28 connects to the special reservoir feature (oil filter housing reservoir 34), the through opening 36 being an inlet for the oil filter housing 28 so that the oil can flow through the oil filter housing 28 to the oil filter 30. The oil filter housing 28 also has an outlet 39 which is formed as, for example, a drilled and tapped 1/4-NPT hole and located in the side of the oil filter housing 28. A through opening 38 of the oil filter 30 connects to the outlet 39 of the oil filter housing 28 so that the oil filtered by and flowing out of the oil filter 30 can flow through the through opening 38, through the outlet 39, and back into the receiving space 14.
The mounting ring 32 which can be seen from Figs. 5 to 7 is, for example, a machined steel ring which is mounted to the oil filter housing 28 with, for example, 1/4-20 cap head screws 40 (Fig. 2). The mounting ring 32 is attached to the housing element 12. For example, the mounting ring 32 is welded to the housing element 12. The mounting ring 32 is positioned at a proper height in the vertical direction of the vehicle so that the oil filter housing 28 and the oil filter 30 are positioned at such a height in the assembled state of the lubricant filtration device 18 and in the vertical direction of the vehicle that the flow of lubricant from the through opening 24 to the oil filter housing 28 and the oil filter 30 can be solely effected by gravity.
Fig. 10 shows a distance D between the through opening 24 (outlet hole) at the top of the housing element 12 and the top of the oil filter housing mounting ring 32, the distance D extending in the vertical direction of the vehicle. Advantageously, the distance D from the through opening 24 at the top of the housing element 12 to the top of the mounting ring 32 in the vertical direction of the vehicle is at least 130 mm. This creates enough gravity pressure to create a sufficient oil flow through the oil filter 30.
In order to guide the oil captured by the oil catcher 20 from the oil catcher 20 and the through opening 24 to the oil filter housing 28, a duct element 42 of the lubricant filtration device 18 is used. The duct element 42 can be designed as a flexible tube. As indicated by directional arrows in Figs. 1 and 2, the oil can flow through the duct element 42, wherein this flow of oil is solely effected by gravity. The duct element 42 is fluidically connected to the through opening 24 on the one side and fluidically connected to the through opening 36 on the other side.
As can be seen from Fig. 9, the housing element 12 has a through opening 44 which is arranged below the through opening 24 and the filter housing outlet 39 of the oil filter housing 28. For example, the through opening 44 is a drilled and tapped 1/4-NPT hole which is located on the low side of the housing element 12 to drain the filtered oil from the oil filter housing 28 back into the receiving space 14 and the housing element 12 respectively. In other words, the through opening 44 acts as an inlet through which the filtered oil can flow into the receiving space 14.
In order to guide the filtered oil from the oil filter housing 28 back into the receiving space 14, a duct element 46 is used. For example, the duct element 46 is designed as a flexible tube. The duct element 46 is fluidically connected to the filter housing outlet 39 on the one side and fluidically connected to the through opening 44 on the other side. As indicated by directional arrows in Fig. 1 and 2, the oil can flow through the duct element 46 from the oil filter housing 28 back into the housing element 12.
Since the through opening 44 is arranged below the filter housing outlet 39 in the vertical direction of the vehicle, the flow of filtered oil from the filter housing outlet 39 through the duct element 46 to the through opening 44 can be solely effected by gravity. For, example, the duct element 42 and/or the duct element 46 can be made of rubber. In order to connect the duct elements 42, 46 to the oil filter housing 28 and/or the housing element 12, brass fittings can be used.
Since the flow of oil from the receiving space 14 to the filter device 26 and back into the receiving space 14 is effected by the ring gear 16 swirling up the oil and gravity, pumps for pumping the oil can be avoided. Thus, the number of parts, the weight and the cost of the lubricant filtration system can be kept particularly low. Moreover, the oil can be filtered very effectively resulting in a better axle oil quality for a longer period of time, a longer bearing and seal life, fewer failures, and ultimately lower cost.
List of reference signs axle gear 12 housing element 14 receiving space 16 ring gear 18 lubricant filtration device oil catcher 22 inner surface 23 outer surface 24 through opening 26 filter device 28 oil filter housing oil filter 32 mounting ring 34 oil filter housing reservoir 36 through opening 36 through opening 39 filter housing outlet head screw 42 duct element 44 through opening 46 duct element D distance

Claims (5)

  1. Claims A lubricant filtration device (18) for a gear (10) of a vehicle, the lubricant filtration device (18) comprising: -at least one housing element (12) of the gear (10), the housing element (12) bounding a receiving space (14) for at least one gear element (16) of the gear (10) at least partly, -at least one catching element (20) attached to the housing element (12) inside the receiving space (14), the catching element (20) being capable of catching lubricant swirled up by the rotating gear element (16), -at least one filter element (30) for filtering the lubricant, the filter element (30) being separate from the catching element (20) and arranged below the catching element (20) in the vertical direction of the vehicle, and -at least one duct element (42) for guiding the lubricant caught by the catching element (20) to the filter element (30), the flow of the lubricant from the catching element (20) via the duct element (42) to the filter element (30) being effected by gravity.
  2. 2. The lubricant filtration device (18) according to claim 1, characterized in that the filter element (30) is attached to the housing element (12) outside the receiving space (14).
  3. 3. The lubricant filtration device (18) according to claim 2, characterized in that the duct element (42) is arranged outside the receiving space (14), wherein the housing element (12) has at least one through opening (24) through which the lubricant caught by the catching element (20) can flow from the catching element (20) to the duct element (42).
  4. 4. The lubricant filtration device (18) according claim 3, characterized in that the filter element (30) is arranged at least 130 millimeters below the through opening (24).
  5. 5. The lubricant filtration device (18) according to any one of claims 2 to 4, characterized in that the lubricant filtration device (18) comprises at least one second duct element (46) for guiding the lubricant filtered by the filter element (30) from the filter element (30) back into the receiving space (14), the flow of the lubricant from the filter element (30) via the second duct element (46) into the receiving space (14) being effected by gravity.
GB1314150.2A 2013-08-07 2013-08-07 Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct Withdrawn GB2506509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1314150.2A GB2506509A (en) 2013-08-07 2013-08-07 Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1314150.2A GB2506509A (en) 2013-08-07 2013-08-07 Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct

Publications (2)

Publication Number Publication Date
GB201314150D0 GB201314150D0 (en) 2013-09-18
GB2506509A true GB2506509A (en) 2014-04-02

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GB1314150.2A Withdrawn GB2506509A (en) 2013-08-07 2013-08-07 Vehicle gear lubrication filter having a separate catching element connected to the filter by a duct

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2535816A (en) * 2015-06-19 2016-08-31 Daimler Ag Housing element for a differential gear of a vehicle
GB2560721A (en) * 2017-03-21 2018-09-26 Bamford Excavators Ltd An oil filter assembly
US11378176B2 (en) * 2019-12-13 2022-07-05 Verlyn Ray Fast Devices, systems, and methods for differential lubrication
US11781638B2 (en) * 2021-04-12 2023-10-10 J. C. Bamford Excavators Limited Axle assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010236582A (en) * 2009-03-30 2010-10-21 Komatsu Ltd Oil introducing device and oil filter device
EP2275708A2 (en) * 2009-07-15 2011-01-19 JATCO Ltd Automatic transmission

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010236582A (en) * 2009-03-30 2010-10-21 Komatsu Ltd Oil introducing device and oil filter device
EP2275708A2 (en) * 2009-07-15 2011-01-19 JATCO Ltd Automatic transmission

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2535816A (en) * 2015-06-19 2016-08-31 Daimler Ag Housing element for a differential gear of a vehicle
GB2560721A (en) * 2017-03-21 2018-09-26 Bamford Excavators Ltd An oil filter assembly
GB2560721B (en) * 2017-03-21 2021-01-06 Bamford Excavators Ltd An oil filter assembly
US11199253B2 (en) 2017-03-21 2021-12-14 J. C. Bamford Excavators Limited Oil filter assembly
US11378176B2 (en) * 2019-12-13 2022-07-05 Verlyn Ray Fast Devices, systems, and methods for differential lubrication
US11781638B2 (en) * 2021-04-12 2023-10-10 J. C. Bamford Excavators Limited Axle assembly

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