WO1982001232A1 - Mecanisme planetaire ayant un deflecteur de fluide - Google Patents

Mecanisme planetaire ayant un deflecteur de fluide Download PDF

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Publication number
WO1982001232A1
WO1982001232A1 PCT/US1980/001284 US8001284W WO8201232A1 WO 1982001232 A1 WO1982001232 A1 WO 1982001232A1 US 8001284 W US8001284 W US 8001284W WO 8201232 A1 WO8201232 A1 WO 8201232A1
Authority
WO
WIPO (PCT)
Prior art keywords
baffle
planetary mechanism
gear element
ring gear
fluid
Prior art date
Application number
PCT/US1980/001284
Other languages
English (en)
Inventor
Tractor Co Caterpillar
Original Assignee
Daniel S
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 Daniel S filed Critical Daniel S
Priority to PCT/US1980/001284 priority Critical patent/WO1982001232A1/fr
Priority to JP81501533A priority patent/JPS57501442A/ja
Priority to IT24183/81A priority patent/IT1138652B/it
Publication of WO1982001232A1 publication Critical patent/WO1982001232A1/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
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2064—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes using at least one positive clutch, e.g. dog clutch

Definitions

  • This invention relates generally to a plane tary mechanism, and more particularly to a device for reducing the drag losses due to fluid churning by the elements of the planetary mechanism.
  • the present invention is directed to overcoming one or more of the problems as set forth above.
  • a baffle is connected to a support in generally encircling relationship to a planetary mechanism having the usual plurality of rotating elements, and the baffle advantageously includes means for wiping fluid from one of the elements in response to rotation thereof and for directing the fluid away from the planetary mechanism.
  • the present invention includes an economical sheet metal baffle of generally cylindrical construction that has an opening therein and a fluid wiping lip located at the opening. Upon rotation of one of the elements of the planetary mechanism located within the baffle fluid is urged upwardly toward the lip, whereupon the lip directs the fluid radially outwardly away from the planetary mechanism so that fluid drag losses and aeration problems are minimized.
  • Fig. 1 is a diagrammatic, elevational sectional view of a planetary mechanism as taken along the central axis thereof, the planetary mechanism having a fluid baffle and being constructed in accordance with the present invention.
  • Fig. 2 is a diagrammatic, transverse, sectional view of the planetary mechanism of Fig. 1 as taken along line II-II thereof.
  • Fig. 3 is a diagrammatic, perspective eleva tional view of the fluid baffle illustrated in Figs. 1 and 2.
  • a planetary mechanism 10 is shown in Fig. 1 as having first and second planetary sets 12 and 14 arranged along a common central axis 16.
  • the first planetary set 12 includes ring gear, sun gear and planet carrier elements 18,20 and 22 of the usual type wherein a plurality of planet gears 24 are rotatably mounted on the carrier element and are in intermeshing engagement with the ring gear and sun gear elements.
  • the second planetary set 14 includes ring gear, sun gear and planet carrier elements 26, 28 and 30, and a plurality of planet elements 32 rotatably mounted in spaced peripheral relationship on the carrier element.
  • the planetary mechanism 10 serves as a vehicle differential with the central axis 16 being disposed normal to the usual forward and reverse direction of vehicle travel.
  • a cross drive housing or stationary support means 34 seirves to contain and rotatably support the planetary mechanism, such that a first or left output member 36 and a second or right output member 38 are adaptable to drive the opposite wheels of the vehicle, not shown.
  • a driving input gear 40 is in meshing engagement with a driven input gear 42 for powering the mechanism.
  • the driven input gear 42 is integrally connected to the first ring gear element 18, and the common body thereof defines a cylindrical outer wall surface 44 of a preselected diameter.
  • the first planet carrier element 22 is releasably connected to the right output member 38
  • the second ring gear element 26 is releasably connected to the left output member 36
  • the first and second sun gear elements 20 and 28 are integrally connected by a common body or shaft 46.
  • the stationary support means 34 includes first and second main casing members 48 and 50 releasably connected together by a plurality of fasteners 52, and first and second tubular extension members 54 and 56 releasably connected to the main casing members 48 and 50 by fasteners 58 and 60 respectively.
  • the second planet carrier element 30 has piloting seat means or a cylindrical piloting seat 62 and is releasably connected to the first main casing member 48 by a plurality of fasteners 64. In essence, the second planet carrier element 30 serves as a stationary support for certain other rotating members of the planetary mechanism 10.
  • a bearing support member 66 is releasably connected to the second main casing member 50.
  • the bearing support member provides a mounting for first and second bearing assemblies 68 and 70 which rotatably support the first planet carrier element 22 and the first ring gear element 18 and integral input gear 42 respectively.
  • the bearing support member 66 defines seat means 72 including a cylindrical outer surface portion 73 and an inclined planar surface 74 intersectingly connected to the cylindrical surface portion 73 and oriented at a preselected angle of inclination.
  • a third bearing assembly 76 supported by the first casing member 48 and the first tubular extension member 54.
  • the second ring gear element 26 and left output member 36 are rotatably supported by the third bearing assembly.
  • a fluid baffle 78 of generally cylindrical construction is provided which extends between the stationary second planet carrier element 30 and the stationary bearing support member 66.
  • the baffle is loosely but relatively closely mounted on the piloting seat means 62 on the left side and is loosely but relatively closely mounted on the positioning seat means 72 on the right side.
  • an elastomeric edge seal 79 extends axially from each of the opposite peripheral edges of the baffle for sealing engagement with the respective piloting and positioning seat means .
  • the baffle 78 is preferably of thin sheet metal, for example 2 mm (0.079") thick, which is formed basically into a cylinder.
  • a passage 80 is defined in the baffle to permit the driving input gear 40 to extend therethrough and into engagement with the driven input gear 42, and first and second inwardly deformed positioning tangs 82 and 84 are formed in the baffle adjacent the passage.
  • the light-weight baffle 78 defines first and second generally diametrically opposed openings 86 and 88 and wiping means 90 for wiping fluid from one of the rotating elements of the planetary mechanism 10 and directing it radially outwardly and away therefrom.
  • Such wiping means includes first and second wiping lips 92 and 94 disposed adjacent the openings 86 and 88 respectively, and which lips are individually effective in a single direction of rotation of the first ring gear element 18.
  • the assembly of the planetary mechanism 10 and the baffle 78 is a relatively simple matter as may be recognized with reference to Fig. 1.
  • the second ring gear element 26 is initially inserted into the bearing assembly 76 and locked in place.
  • a subassembly, including the second planet carrier element 30 and the planet gears 32 is slipped into the ring gear element 26 and the second planet carrier element secured to the first casing member 48 by screw-threaded installation of the fasteners 64.
  • the sun gear elements 20,28 and connecting shaft 46 are dropped into position and a second subassembly including the first planet carrier element 22 and the planet gears 24 set in place.
  • a third subassembly including the first ring gear element 18, bearing support member 66 and the bearing assemblies 68 and 70 is slipped onto the planet gears 24 and onto the output end of the first planet carrier element 22 where it is locked in position.
  • the baffle 78 is subsequently axially installed upon the piloting seat means 62 and over the positioning seat means 72 such that the bent tabs or tangs 82,84 fit closely over the flat surface 74 thereof and nonrotatably support the baffle at the desired angular attitude.
  • the second casing member 50 and second tubular extension member 56 can be installed.
  • the baffle 78 effectively encircles the mid portion of the planetary mechanism 10 and defines with the fixed and opposite supporting members 30 and 66 an internal chamber 96. Outside of the baffle, and within the main casing members 48 and 50 is an external chamber 98. As is schematically illustrated, the operational relationship of the baffle and planetary mechanism is such as to maintain a preselected fluid level "A" within the internal chamber at a substantially lower elevation than the fluid level "B" in the external chamber as is indicated by the letters in the drawing.
  • the baffle 78 encircles the planetary mechanism 10, it minimizes fluid entry into the internal chamber 96 from above. Particularly, fluid splashes down upon the planetary mechanism from the associated portions of the power train, not illustrated.
  • the baffle is primarily used to remove lubricating fluid that enters the internal chamber 96 from within the baffle. Lubricating fluid is introduced through the stationary second planet carrier element 30 into a centrally located lubrication chamber 99 defined between the internested first and second planet carrier elements 22,30 and as is shown in Fig. 1. From the lubrication chamber the fluid is directed to the planet gear bearings and remaining portions of the planetary mechanism in the usual manner.
  • the lower fluid level "A" in the internal chamber 96 is achieved by the advantageous close radial relationship of the wiping means 90 of the baffle 78 and the rotating cylindrical surface 44 of the first ring gear element 18.
  • the preferred radial clearance is about 2 mm (0.079") thereat.
  • the right lip 94 is effective when the first ring gear element rotates in a counterclockwise direction.
  • the edge seals 79 need not extend fully around the peripheral edges of the baffle. However, the seals should extend around the edges through at least the lower half of the baffle up to the elevation of the openings 86,88 in order to minimize fluid leakage. If the driven input gear 42 were larger in diameter than the cylindrical outer wall surface 44 the fluid baffle could be closely radially spaced thereto. The teeth of the driven input gear would serve as paddle wheels and in association with the slightly axially repositioned lips 92,94 could be more effective.
  • the driven input gear 42 would still be acting as one element of the planetary mechanism 10 since it is connected for joint rotation with the planet carrier element 22.
  • the cylindrical outer wall surface 44 can be provided with a plurality of gear teeth or splines, not shown, for improved operational cooperation with the wiping lips 92,94.
  • a fluid baffle is provided for a planetary mechanism which is of lightweight and economical construction, can be easily assembled, and is effective to reduce the fluid drag losses due to fluid churning by certain ones of the rotating elements of the planetary mechanism and by lowering the fluid level in the region generally disposed within the baffle.

Landscapes

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

Abstract

Un deflecteur (78) encercle un mecanisme planetaire (10) ayant une couronne dentee (18), un engrenage principal (20), un element porteur planetaire (22) et une pluralite d'engrenages planetaires e (24) et il est connecte a un support stationnaire (30, 48, 50, 66). Le deflecteur (78) comprend des moyens d'essuyage (90) pour essuyer le fluide de l'un des elements (18, 20, 22, 24) en reponse a leurs rotations et diriger le fluide radialement en l'eloignant du mecanisme planetaire (10), eliminant ainsi les pertes radiales elevees.
PCT/US1980/001284 1980-09-29 1980-09-29 Mecanisme planetaire ayant un deflecteur de fluide WO1982001232A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/US1980/001284 WO1982001232A1 (fr) 1980-09-29 1980-09-29 Mecanisme planetaire ayant un deflecteur de fluide
JP81501533A JPS57501442A (fr) 1980-09-29 1980-09-29
IT24183/81A IT1138652B (it) 1980-09-29 1981-09-28 Meccanismo planetario avente uno schermo per fluido

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1980/001284 WO1982001232A1 (fr) 1980-09-29 1980-09-29 Mecanisme planetaire ayant un deflecteur de fluide
WOUS80/01284800929 1980-09-29

Publications (1)

Publication Number Publication Date
WO1982001232A1 true WO1982001232A1 (fr) 1982-04-15

Family

ID=22154568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/001284 WO1982001232A1 (fr) 1980-09-29 1980-09-29 Mecanisme planetaire ayant un deflecteur de fluide

Country Status (3)

Country Link
JP (1) JPS57501442A (fr)
IT (1) IT1138652B (fr)
WO (1) WO1982001232A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166658A1 (fr) * 1984-06-27 1986-01-02 BENDIX France Dispositif de lubrification d'un train d'engrenages
FR2566869A1 (fr) * 1984-06-27 1986-01-03 Dba Dispositif de lubrification d'un train d'engrenages
US11674590B2 (en) 2020-08-10 2023-06-13 Dana Automotive Systems Group, Llc Methods and systems for a gear box with multiple ratios

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554081A (en) * 1923-03-23 1925-09-15 Gen Electric Self-oiling gearing
US2968190A (en) * 1958-02-17 1961-01-17 Borg Warner Transmission mechanism
US3182527A (en) * 1964-02-28 1965-05-11 Pacific Car & Foundry Co Self-lubricating differential
US3407902A (en) * 1966-03-15 1968-10-29 United Shoe Machinery Corp Lubrication systems
US3529698A (en) * 1967-05-05 1970-09-22 Gen Electric Self-operating lubrication system for gear drive units
US3539035A (en) * 1967-09-19 1970-11-10 Wuelfel Eisenwerk Lubricating device for planetary gearing
US3618711A (en) * 1970-06-08 1971-11-09 Eaton Yale & Towne Lubrication system for a geared-drive mechanism
US3625310A (en) * 1970-01-20 1971-12-07 Dresser Ind Gearbox lubrication
US4227427A (en) * 1977-09-08 1980-10-14 Dana Corporation Drive unit assembly
US4231266A (en) * 1977-10-12 1980-11-04 Toyota Jidosha Kogyo Kabushiki Kaisha Lubricating device for power transmission unit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554081A (en) * 1923-03-23 1925-09-15 Gen Electric Self-oiling gearing
US2968190A (en) * 1958-02-17 1961-01-17 Borg Warner Transmission mechanism
US3182527A (en) * 1964-02-28 1965-05-11 Pacific Car & Foundry Co Self-lubricating differential
US3407902A (en) * 1966-03-15 1968-10-29 United Shoe Machinery Corp Lubrication systems
US3529698A (en) * 1967-05-05 1970-09-22 Gen Electric Self-operating lubrication system for gear drive units
US3539035A (en) * 1967-09-19 1970-11-10 Wuelfel Eisenwerk Lubricating device for planetary gearing
US3625310A (en) * 1970-01-20 1971-12-07 Dresser Ind Gearbox lubrication
US3618711A (en) * 1970-06-08 1971-11-09 Eaton Yale & Towne Lubrication system for a geared-drive mechanism
US4227427A (en) * 1977-09-08 1980-10-14 Dana Corporation Drive unit assembly
US4231266A (en) * 1977-10-12 1980-11-04 Toyota Jidosha Kogyo Kabushiki Kaisha Lubricating device for power transmission unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166658A1 (fr) * 1984-06-27 1986-01-02 BENDIX France Dispositif de lubrification d'un train d'engrenages
FR2566869A1 (fr) * 1984-06-27 1986-01-03 Dba Dispositif de lubrification d'un train d'engrenages
US4630711A (en) * 1984-06-27 1986-12-23 Societe Anonyme D.B.A. Device for lubricating a geartrain
US11674590B2 (en) 2020-08-10 2023-06-13 Dana Automotive Systems Group, Llc Methods and systems for a gear box with multiple ratios

Also Published As

Publication number Publication date
IT1138652B (it) 1986-09-17
JPS57501442A (fr) 1982-08-12
IT8124183A0 (it) 1981-09-28

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