WO2005052412A1 - Lubrification de boite de vitesses - Google Patents

Lubrification de boite de vitesses Download PDF

Info

Publication number
WO2005052412A1
WO2005052412A1 PCT/GB2004/004539 GB2004004539W WO2005052412A1 WO 2005052412 A1 WO2005052412 A1 WO 2005052412A1 GB 2004004539 W GB2004004539 W GB 2004004539W WO 2005052412 A1 WO2005052412 A1 WO 2005052412A1
Authority
WO
WIPO (PCT)
Prior art keywords
gearbox
oil
selected site
lubricant
arrangement according
Prior art date
Application number
PCT/GB2004/004539
Other languages
English (en)
Inventor
Anthony Kilshaw
Alan William Mawson
Original Assignee
Eaton Corporation
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 Eaton Corporation filed Critical Eaton Corporation
Publication of WO2005052412A1 publication Critical patent/WO2005052412A1/fr

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
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0471—Bearing
    • 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
    • F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
    • 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
    • F16H57/048—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 present invention relates to gearboxes particularly, though not exclusively, to gearboxes for automotive use and to the improvement of lubrication of bearings therein.
  • Gearboxes generally contain two principal shafts on which the gears are arrayed: the main shaft; and, the layshaft. Both the mainshaft and the layshaft are disposed within the gearbox casing with their axes parallel to each other and each are supported at least by bearings disposed adjacent the ends thereof. Most gearboxes also contain a reverse idler gear support shaft and an input shaft which usually provides bearing support for one end of the mainshaft.
  • the gearbox may be installed with the two shafts orientated either generally one above the other or in a generally side by side relationship.
  • the gearbox casing has a generally oval shape in cross section (orthogonal to the shaft axes) and the mainshaft and layshaft are generally disposed within the casing with the axes thereof orthogonal to and spaced apart along the major axis of the oval.
  • gearbox is installed in a vertical arrangement with the mainshaft and layshaft one above the other, there is frequently sufficient room within the top portion of the casing to provide features such as oil catching troughs and the like which may be used to duct or otherwise convey additional oil to parts of the gearbox, such as bearings, for example, which may be only marginally lubricated in the absence of such additional oil conveying means.
  • the layshaft which is generally the lower shaft, tends to be more deeply immersed in the oil in the gearbox sump and thus, tends to disperse more copious quantities of oil around the interior of the gearbox casing by the centrifugal action of the rotating gears .
  • US-A-5 699 877 describes a gearbox where oil is ducted to main bearings by a trough like oil-catching arrangement as described above.
  • DE-A-199 12 328 describes an arrangement for additional lubrication of gear-pairs by providing an overhead oil conduit having oil dispensing apertures which are blocked off until a particular gear-pair are selected in loaded engagement beneath an aperture which is then opened to provide a source of additional lubricating oil to the gear-pair under load.
  • an arrangement for providing specific lubrication of a selected site within a gearbox comprises a lubricant receiving reservoir adjacent a pair of gearwheels from which lubricant is extruded, in use, during operation of said gearbox and duct means to convey said lubricant to said selected site.
  • a method of providing specific lubrication to a selected site within a gearbox comprises the steps of: providing lubricant receiving reservoir means adjacent a pair of gearwheels from which lubricant is extruded, in use, during operation of said gearbox; and providing duct means to convey said lubricant from said reservoir to said selected site.
  • the selected site requiring additional oil supply to correct an otherwise marginal lubrication condition may be a gearbox shaft main bearing, for example, a mainshaft main bearing.
  • the oil collecting reservoir may be formed by a bearing cover member or bearing retaining ring member of the adjacent layshaft bearing or by a power take-off, for example.
  • the duct means may be formed by a single duct or by a plurality of intersecting or interconnecting duct portions or chambers formed in or on the gearbox casing.
  • the duct portions may be constituted by holes formed by drilling after casting or by cored holes produced during the casing casting process, for example, and which may be connected by chamber portions created between casing ribs, for example, by the provision of blanking plates to seal off an inter-rib portion to create a chamber.
  • the oil may be conveyed from the oil collecting reservoir means to the selected site by means of gravity. Consequently, the point of entry of the oil to the selected site must be lower under normal operating conditions than the exit point from the oil collecting reservoir means.
  • a gearbox having the arrangement of the first aspect and/or made by the method of the second aspect of the present invention.
  • Figure 1 shows a sectional view in plan of part of a gearbox rear main bearing region incorporating an arrangement according to the present invention
  • Figure 2 shows a part of the rear layshaft bearing of Figure 1 in more detail
  • Figure 3 shows an end view of the gearbox casing of Figures 1 and 2;
  • Figure 4 shows a more detailed cross sectional plan view of the duct means provided in the embodiment of Figures 1 to 3;
  • Figure 5 shows an end view of a section through the reverse idler/reverse gear and layshaft;
  • Figure 6 which shows a further clarifying partial end view of the gearbox showing the mainshaft and layshaft support bearing bores and other detail.
  • Figures 1 to 6 show partial cross sections and views through part of the output end of a gearbox 10.
  • the gearbox includes a mainshaft 12 having a reverse gear 14; a layshaft 16 having a reverse gear portion 18 'to cooperate with the reverse gear 14 of the mainshaft; and, a reverse gear idler 20.
  • a casing 22 contains all of the shafts and gears.
  • the mainshaft 12 having an axis of rotation 26 and the layshaft 16 having an axis of rotation 28 are disposed in a generally side-by-side relationship with the axes of rotation 26, 28 being parallel to each other.
  • the mainshaft 12 is supported at its output end by a rolling element bearing 30, in this case a taper roller bearing having a plurality of rollers 32; the mainshaft 12 also having a output flange 36 to transfer drive to an axle (not shown) .
  • the layshaft 16 is supported at the output end by a rolling element bearing 40 again in this case a taper roller bearing having a plurality of rollers 42.
  • the roller bearing 40 is mounted in the casing 22 in a bore 44 by means of the race 46, the bore 44 and bearing 40 being sealed from the ambient atmosphere by a layshaft bearing cover 50.
  • the layshaft bearing cover 50 closes and defines an internal volume 52 between the bearing 40 and the inner surface 54 of the bearing cover 50; this volume 52 constituting an oil receiving reservoir.
  • Lubricating oil 60 denoted by the large arrow 62 is directed into the oil receiving reservoir 52 by being extruded between the teeth of the mainshaft reverse gear 14 and the reverse idler gear 20 and is in the form of a jet (depicted by the arrow 62) having a directional component towards the layshaft bearing 40.
  • the layshaft bearing 40 has itself a pumping action which tends to pump oil in the reverse direction away from the cover member 50 and thus, the extruded oil produced by the squeezing action of the gear teeth is in the form of a jet and is sufficient to overcome the opposite pumping action of the layshaft bearing 40.
  • the volume 52 in the layshaft bearing cover 50 fills with oil up to a minimum level indicated by the root end 68 of arrow 70 shown in Figure 3, however, this is a minimum level and the level may be above this minimum depending upon shaft speed and inclination of the transmission, for example.
  • the oil in the oil receiving reservoir 52 is ducted to the space 74 which lies axially outwardly of the mainshaft bearing 30 and axially inwardly of a mainshaft oil seal 76 which seals against the rotating mainshaft by a lip 80.
  • the layshaft 16 and bearing 40 may be sealed with the cover 50 since the shaft 16 does not exit the casing 22, the mainshaft 12 must be provided with sealing means since it must exit the casing 22 to drive the flange 36 (the phrases "exit the casing” and “does not exit the casing” mean that at least the end of the relevant shaft is or is not exposed outside the casing to drive a shaft or a power take-off, for example) .
  • the oil seal 76 retains oil within the casing 22 the rubbing lip 80 also requires to be lubricated to prevent wear thereof and consequent failure.
  • the entry point 84 (depicted by the head of the arrow 70) of oil to the space 74 is at a level lower than the exit point from the reservoir 52.
  • a series of interconnected ducts and chambers are created to form the required duct path 70 (denoted in Figure 4 by three arrows 90, 92, 94).
  • a hole 100 is drilled from the oil receiving reservoir 52 (i.e. the cavity inside the layshaft bearing cover 50) at a height of approximately one third to one half of the diameter of the layshaft support bearing bore 44 from the bottom of the bore to an enclosure 102 on the inside of the gearbox casing casting 22 (see also Figures 3 and 6) .
  • the direction of oil flow through the hole 100 is indicated by arrow 90.
  • a second hole 104 is drilled from the cavity 102 to break into a third cross-hole 106 drilled from the outside of the casing 22; the direction of oil flow in these latter two holes being indicated by arrows 92, 94, respectively.
  • Third hole 106 breaks into the cavity 74 between the rear mainshaft taper roller bearing 30 and the oil seal 76 just above the bottom of the mainshaft bearing bore 110.
  • a blanking plate member 112 is fixed across the face of cavity 102 to thereby seal it and similarly, a blanking plug 114 is also provided to seal the end of hole 106 so as to provide a closed oil path 70 (see Fig.3) from the oil receiving reservoir 52 to the cavity 74 and also to prevent an oil leak to the exterior of casing 22.
  • the three cross drillings 100, 104, 106 together constitute the oil path 70 and provide a fall in height from the oil receiving reservoir 52 to the cavity 74 so as to promote oil flow.
  • the cavity 102 is formed between two stiffening ribs 120, 122 of the casing casting 22 and the lands 124, 126 surrounding the bearing receiving bores 44 and 110 (see Fig. 6) . It is not necessary for the blanking plate 112 to provide a complete seal to the cavity 102 as any oil leakage will be internally into the gearbox casing.
  • the fall in height from the layshaft bearing bore drilling 100 to the exit end of the drilling 106 is sufficient to allow for changes in normal driving attitude of the gearbox installed in a truck, for example, so that oil supply to the cavity 74 is continuous .
  • the above embodiment is merely one example of putting the present invention into effect and is thus not limiting. Many changes may be made to the detailed implementation of the invention without departing from the spirit and scope thereof.
  • the blanking plate member 112 could be replaced in alternative designs of gearbox by a conventional so-called core plug to blank off a hole produced by a removable core during the gearbox case casting process.
  • the embodiment described above depicts a layshaft which does not exit the casing
  • gearbox designs exist where a power take-off shaft driven by the end of the layshaft which does exit the casing.
  • the layshaft bearing cover 50 of the above embodiment may be replaced with a known power takeoff assembly where a cover and seal arrangement or some other alternative arrangement is substituted, the arrangement being provided with a space acting as the oil receiving reservoir 52; for example, much in the manner of the space 74 described above.
  • the oil path 70 is formed in the above described embodiment by three conduits 90, 92, 94 and a chamber 102, the conduits being in non-linear relationship to each other.
  • the arrangement described is a consequence of the particular gearbox casing design, but however, other gearbox casing designs may permit a straight conduit from the oil receiving reservoir to the selected site requiring additional lubrication.
  • a non-linear conduit from one to the other may be created but nevertheless a single conduit in the sense that it is formed in a single operation, for example, as a removable core during the case casting process.

Landscapes

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

Abstract

La présente invention concerne un procédé et un dispositif permettant de réaliser une lubrification spécifique d'un site désigné à l'intérieur d'une boîte de vitesse. Le dispositif comprend essentiellement un réservoir récepteur de lubrifiant adjacent à une paire de pignons à partir desquels, en fonctionnement, le lubrifiant est extrudé pendant le fonctionnement de ladite boîte de vitesses. Le dispositif comprend également un organe formant conduit pour amener ledit lubrifiant sur ce même site désigné.
PCT/GB2004/004539 2003-10-29 2004-10-28 Lubrification de boite de vitesses WO2005052412A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0325214A GB0325214D0 (en) 2003-10-29 2003-10-29 Gearbox lubrication
GB0325214.5 2003-10-29

Publications (1)

Publication Number Publication Date
WO2005052412A1 true WO2005052412A1 (fr) 2005-06-09

Family

ID=29725554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/004539 WO2005052412A1 (fr) 2003-10-29 2004-10-28 Lubrification de boite de vitesses

Country Status (2)

Country Link
GB (1) GB0325214D0 (fr)
WO (1) WO2005052412A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102654191A (zh) * 2011-03-01 2012-09-05 Zf腓德烈斯哈芬股份公司 油泵设施
CN103807417A (zh) * 2012-11-14 2014-05-21 本田技研工业株式会社 变速器的油排出结构
CN111795137A (zh) * 2020-07-17 2020-10-20 一汽解放汽车有限公司 一种变速器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834700A1 (de) * 1977-10-12 1979-04-19 Toyota Motor Co Ltd Kraftfahrzeuggetriebe
EP0237862A2 (fr) * 1986-03-04 1987-09-23 The Timken Company Lubrification d'un roulement interne d'une transmission d'automobile
DE3928739A1 (de) * 1988-09-06 1990-03-15 Brown David Corp Plc Getriebe
DE4131164A1 (de) * 1991-09-19 1993-03-25 Porsche Ag Vorrichtung zur lagerschmierung
DE19930804A1 (de) * 1999-07-03 2001-01-18 Zahnradfabrik Friedrichshafen Getriebe mit einer Schmiermittelversorgungseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834700A1 (de) * 1977-10-12 1979-04-19 Toyota Motor Co Ltd Kraftfahrzeuggetriebe
EP0237862A2 (fr) * 1986-03-04 1987-09-23 The Timken Company Lubrification d'un roulement interne d'une transmission d'automobile
DE3928739A1 (de) * 1988-09-06 1990-03-15 Brown David Corp Plc Getriebe
DE4131164A1 (de) * 1991-09-19 1993-03-25 Porsche Ag Vorrichtung zur lagerschmierung
DE19930804A1 (de) * 1999-07-03 2001-01-18 Zahnradfabrik Friedrichshafen Getriebe mit einer Schmiermittelversorgungseinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102654191A (zh) * 2011-03-01 2012-09-05 Zf腓德烈斯哈芬股份公司 油泵设施
CN103807417A (zh) * 2012-11-14 2014-05-21 本田技研工业株式会社 变速器的油排出结构
CN111795137A (zh) * 2020-07-17 2020-10-20 一汽解放汽车有限公司 一种变速器

Also Published As

Publication number Publication date
GB0325214D0 (en) 2003-12-03

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