EP0222785A1 - Embrayage dente a roue libre auto-enclenchable - Google Patents

Embrayage dente a roue libre auto-enclenchable

Info

Publication number
EP0222785A1
EP0222785A1 EP86902286A EP86902286A EP0222785A1 EP 0222785 A1 EP0222785 A1 EP 0222785A1 EP 86902286 A EP86902286 A EP 86902286A EP 86902286 A EP86902286 A EP 86902286A EP 0222785 A1 EP0222785 A1 EP 0222785A1
Authority
EP
European Patent Office
Prior art keywords
teeth
shaft
sliding gear
gear
sliding
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Withdrawn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
EP86902286A
Other languages
German (de)
English (en)
Inventor
Samuel Arthur Thomas Woodbridge
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0222785A1 publication Critical patent/EP0222785A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/10Arrangements for synchronisation, also for power-operated clutches automatically producing the engagement of the clutch when the clutch members are moving at the same speed; Indicating synchronisation

Definitions

  • This invention relates to transmission systemsfor vehicles.
  • the present invention resides in a transmission system for vehicles including: a substantially tubular body; a respective set of teeth provided circum- ferentially around the interior of the body at each end of the body; a shaft rotatably mounted in the body coaxially therewith; a sliding gear mounted on the shaft having a set of external gear teeth at each end of the sliding gear engageable with a respective set of teeth on the body; means to translationally move the sliding gear along the shaft; and means to operably drivingly connect the sliding gear to the shaft; so arranged that, on translational movement of the sliding gear along the shaft from a first position intermediate the length of the shaft where both sets of the external gear teeth on the driving gear are dis-engaged from both sets of teeth in the body to a second or third position where one set of external gear teeth is engaged with a respective set of teeth in the body, the external gear teeth and teeth in the body are at least partially meshed before the driving means conn ⁇ ects the sliding gear to the shaft.
  • the present invention resides in a transmission system for vehicles including: a shaf ; a sliding gear mounted on the shaft having a set of external .gear teeth at each end of the sliding gear; means to translationally move the sliding gear along the shaft; means to operably drivingly connect the sliding gear to the shaft; a body comprising a pair of body members rotatably mounted on the shaft coaxially therewith, each body member having a respective set of teeth provided around the inner faces of the body members engageable with a respective set of teeth on the sliding gear; and means to operably drivingly connect the pair of body members to rotate the body members in unison, so arranged that, on translational movement of the sliding gear along the shaft from a first position intermediate the length of the shaft where both sets of external gear teeth on the driving gear are dis-engaged from both sets of teeth in the body to a second or third position where one set of external gear teeth is engaged with a respective set of teeth in the body, the external gear teeth and teeth in the body are at least partially meshed before
  • the driving means connecting the sliding gear to the shaft is fully engaged before the teeth on the sliding gear and the body (or body members) are fully meshed.
  • the teeth in the body (or body members) are provided around the ends of the body (or body members) or on end plates fitted into the body, the shaft preferably being journalled in bearings or bushes in the end plates.
  • the means to translationally move .li ⁇ the sliding gear along the shaft includes a plurality of grooves or splines on the shaft, and balls, p ' egs or teeth on the sliding gear engaged with the grooves or splines.
  • the driving means include a pair of gears on the shaft, one at each end of the sliding gear and each having a set of teeth operably to engage a second set of external gear teeth on the sliding gear when the sliding gear moves to its second or third positions.
  • the gear may be fixed to the shaft by splines with a fewer number of splines than teeth on the gears to enable the relationship of the gear to the shaft to be changed.
  • an overrun sleeve may be provided on the sliding gear and arranged to lag relative to the sliding gear, the sleeve engaging the body (or body members).
  • a pair of fingers may be prov- ided to limit the movement along the shaft, a magnetic coupling operating a rocker arm to selectively move the fingers into, or out of, engagement with the sliding gear.
  • a further alternative is a solenoid operated finger to selectively engage the sliding gear.
  • FIG. 1 is a schematic view of a coupling between a transfer case and propellor shaft of a four wheel drive vehicle of the type shown in FIG. 1 of International Patent Application No. PCT/AU82/00170 incorporating one embodiment of the present invention
  • FIG. 2 is a sectional side view of the teeth on the sliding gear and the body;
  • FIG. 3 is a sectional end view of one of the balls in the sliding gear in its groove on the shaft;
  • FIG. 4 is a similar view as FIG. 1 of a second embodiment provided with the overrun sleeve on the sliding gear;
  • FIG. 5 is a front view of the overrun sleeve of FIG. 4;
  • FIG. 6 is a schematic sectional view of one half of a differential of the type disclosed in my
  • FIG. 7 is a sectional end view taken on line 7-7 on FIG. 6;
  • FIG. 8 is a schematic part sectional view of a coupling incorporating a solenoid-operated finger to limit overrun of the sliding gear.
  • the transmission system in the form of a coupling 10, has a drive shaft 11 jour ⁇ nalled in bushes 12 in the end plates 13 of a tubular body 14 connected to a propellor shaft of a four wheel drive vehicle (not shown).
  • a sliding gear 15 is provided on the shaft
  • a set of teeth 16 are provided circumferentially around the inner face of each end plate 13 to mesh with a corresponding set of external teeth 17 on the adjacent side face of the sliding gear 15.
  • the teeth 17 are formed with the angles 90° ⁇ ⁇ -* - ⁇ 120° and 90° - /3 .93° and with the nose of the teeth 16 relieved by the angle 0° ⁇ . & ⁇ 20 °• Wnen tne teeth 16, 17 are meshed, the sliding gear 15 operatively drives the body 14. However, should the body 14 rotate faster than the sliding gear 15, the teeth 16, 17 will freely become disengaged to break the driving engagement.
  • a ball 20 rolls in each groove and is received at the inner end of a respective radial bore 21 in the sliding gear.
  • Each ball 20 is pressed into the groove 18 by a spring-loaded plunger 22 where the spring 23 is supported by a removable plug 24.
  • a set of sawteeth 26 are provided at each end of the sliding gear 15 coaxial with the teeth 17.
  • Each tooth has a front face parallel with the axis of the shaft and a rear face at the angle thereto.
  • Corresponding teeth 25 are provided on an adjacent gear 25a which has its hub 27 fitted with splines which mesh with splines 28 on the drive shaft.
  • the number of splines 28 is less than the number of teeth 25 to enable the gears 25a to be rotated relative to the shaft to ensure optimum meshing of the teeth 16, 17.
  • a thrust plate 29 is provided between each gear 25a and the adjacent end plate 13 of the body. Spring loaded plungers 30 are received in longitudinal bores 31 in the sliding gear 15 urging the sliding gear to a position inter ⁇ mediate the gears 25a.
  • both teeth 16,17 and teeth 24, 25 will become fully engaged or meshed to provide an operative driving connection between the drive shaft 11 and the body 14.
  • the balls 20 enter, the end portion 19 at the grooves 18 and so no side forces are applied to them.
  • the balls 20 can ride up the side faces of the grooves 18, against the plunger 22, to relieve any large side forces on them.
  • the teeth 25, 26 are so designed to mesh after teeth 16, 17 as hereinbefore described. However, they are fully meshed at or before the teeth 16, 17 become fully meshed so that the sliding gear is fully connected to the shaft before it is fully connected to the body.
  • the balls 20 roll back along the grooves to disengage the sliding gear from the body and so break the driving connection between the drive shaft and the body.
  • the balls 20 may be replaced by legs (which may be spring loaded) in the sliding gear or short teeth in the sliding gear may engage helical splines on the drive shaft.
  • the coupling 10 may be used in all applications illustrated in my International applications where a coupling or control unit employs a sliding gear to provide a disengageable drive between a drive shaft and a body. Referring now to FIGS. 4 and 5, the coupling
  • FIG. 6 shows one half of a differential based on the differentials in my International Application No. PCT/AU85/00048.
  • each coupling 60 the tubular body (i.e. corresponding to tubular bodies 13 and 43 in FIGS. 1 and 4) is replaced by a pair of body members 61 each rotatably mounted on the shaft 62 and having teeth 63 which engage complimentary teeth 64 on the sliding gear 65.
  • the sliding gear 65 has internal splines 66 which engage complimentary splines 67 on the shaft 62, the splines 66, 67 being of opposite hand to the teeth 63, 64 to provide a releasable driving connection between the shaft 62 and body members 61 via the slid ⁇ ing gear 65 in the manner described in my International Application No. PCT/AU82/00170.
  • the body members 61 To enable the body members 61 to be driven in unison, they are provided with external teeth 68 which mesh with complimentary teeth 69 on respective pinion gear 70 fixed on a shaft 71.
  • the shaft 71 is journalled in bearings 72 in the differential housing (not shown) and is driven via a pinion 73 which meshes with a gear 74 driven by the crown wheel 75.
  • the differential housing contains suitable lubricant e.g. S.A.E. 90 hypoid oil or automatic trans ⁇ mission fluid (ATF), this will lubricate the couplings 60 and so an enclosed tubular body to contain the lubricant is not required.
  • suitable lubricant e.g. S.A.E. 90 hypoid oil or automatic trans ⁇ mission fluid (ATF)
  • a block 76 is rotatably mounted on the shaft 71 but is prevented from rotation therewith.
  • a brass collar 77 has a pair of rings 78 connected by a bridge 79.
  • Each ring 78 has a permanent horseshoe magnet 80 - which rubs against the adjacent pinion gear 70 to provide a lagging connection between the collar 77, which has limited rotational movement e.g. " t - 3 about a neutral position, and the pinion gear.
  • a rocker arm 81 is pivotally mounted on a pin 82 on the block 76 and is movable by a pin 83 on the bridge 79.
  • the pin 83 on the bridge 79 and a pin 84 on the rocker arm 81 alternately extend and retract a pair of fingers 85 slidably mounted on the block 76.
  • the fingers can selectively engage a peripheral flange 86 on the sliding gear 65.
  • the coupling 90 has a sliding gear 91 which is prevented from overrunning to the reverse position by a finger 92 which can releas- ably engage the peripheral flange 93 on the sliding gear.
  • the finger 92 is connected to the plunger 94 of a solenoid 95 mounted on the housing 96 of the coup ⁇ ling on the differential in which it is fitted.
  • the solenoid 95 is- connected to earth and to the reversing light switch (not shown) so that the finger 92 is only retracted, to allow the sliding gear to engage the body member 97 in the reverse position, when the vehicle transmission is in reverse.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Gear Transmission (AREA)

Abstract

Un accouplement (10) pour un arbre de propulsion ou dans un différentiel comprend un engrenage coulissant (15) qui connecte opérationnellement un arbre (11) à un corps (14) mais déconnecte la transmission lorsque le corps (14) est mis en rotation plus rapide que l'engrenage coulissant (15). Des billes (20) engagées dans des rainures (18) de l'arbre (11) déplacent l'engrenage coulisant (15) le long de l'arbre pour mettre en prise les dents (16, 17) de l'engrenage coulissant (15) et des plaques d'extrémité (13) du corps (14), avant que les dents (26, 25) de l'engrenage coulissant (15) n'enclenchent l'engrenage (25a) tourillonné sur l'arbre (11). Des plongeurs (30) sollicités par des ressorts et reçus dans des alésages (31) de l'engrenage coulissant (15) empêchent celui-ci de dépasser sa position neutre centrale lorsque le mouvement de rotation de l'arbre (11) s'arrête, en séparant l'engrenage coulissant (15) du corps (14).
EP86902286A 1985-05-15 1986-04-09 Embrayage dente a roue libre auto-enclenchable Withdrawn EP0222785A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU42509/85 1985-05-15
AU42509/85A AU570800B2 (en) 1985-05-15 1985-05-15 Transmission systems for vehicles

Publications (1)

Publication Number Publication Date
EP0222785A1 true EP0222785A1 (fr) 1987-05-27

Family

ID=3729725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902286A Withdrawn EP0222785A1 (fr) 1985-05-15 1986-04-09 Embrayage dente a roue libre auto-enclenchable

Country Status (5)

Country Link
EP (1) EP0222785A1 (fr)
JP (1) JPS62502906A (fr)
AU (1) AU570800B2 (fr)
WO (1) WO1986006804A1 (fr)
ZA (1) ZA863554B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573441B2 (en) * 1985-05-15 1988-06-09 Samuel Arthur Thomas Woodbridge Self engaging freewheel toothed clutch
AU607822B2 (en) * 1987-11-16 1991-03-14 Dean, Malcolm Leonard Stephen Spin-control differential
US5025902A (en) * 1990-01-04 1991-06-25 Aichi Kikai Kogyo Kabushiki Kaisha Bidirectional differential clutch
US5901817A (en) * 1997-04-18 1999-05-11 The Boeing Company Torque limiter with trip indicator
WO2003046398A1 (fr) * 2001-10-09 2003-06-05 Johannes Jacobus Naude Embrayage a commande synchronisee
CN104002921B (zh) * 2013-12-15 2016-05-25 广西科技大学 减少自行车滑行阻力的动力传递装置
CN112594109B (zh) * 2020-12-14 2022-05-10 重庆华洋单向器制造有限公司 一种单向器
CN114941664B (zh) * 2022-04-28 2024-02-06 浙江长宇新材料股份有限公司 辊轴离合机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB354711A (en) * 1930-05-06 1931-08-06 Norton Legge Improvements relating to overrunning devices for motor vehicles and the like
GB1428983A (en) * 1972-07-10 1976-03-24 Ssspatents Ltd Synchronous self-shifting toothed clutch
GB1476696A (en) * 1974-10-11 1977-06-16 Sss Patents Ltd Synchronous self-shifting toothed clutch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606804A1 *

Also Published As

Publication number Publication date
ZA863554B (en) 1986-12-30
JPS62502906A (ja) 1987-11-19
AU4250985A (en) 1986-11-20
WO1986006804A1 (fr) 1986-11-20
AU570800B2 (en) 1988-03-24

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