WO2018017512A1 - Ensemble embrayage - Google Patents

Ensemble embrayage Download PDF

Info

Publication number
WO2018017512A1
WO2018017512A1 PCT/US2017/042482 US2017042482W WO2018017512A1 WO 2018017512 A1 WO2018017512 A1 WO 2018017512A1 US 2017042482 W US2017042482 W US 2017042482W WO 2018017512 A1 WO2018017512 A1 WO 2018017512A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch assembly
outer member
recess
driving
coupler
Prior art date
Application number
PCT/US2017/042482
Other languages
English (en)
Inventor
Daniel Eugene SPERFSLAGE
Scott Jason ZANGL
Daryl James JAEGER
Original Assignee
Actuant 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 Actuant Corporation filed Critical Actuant Corporation
Publication of WO2018017512A1 publication Critical patent/WO2018017512A1/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
    • F16D43/202—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
    • F16D43/2028—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with at least one part moving radially between engagement and disengagement
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
    • F16D7/048—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with parts moving radially between engagement and disengagement

Definitions

  • This invention generally relates to a torque overload clutch assembly and, in particular, to a clutch assembly for a gearbox of a corn head row unit.
  • the clutch assembly may generally include an outer member; an inner member radially inward of the outer member and adapted to be received on the common drive shaft; at least one detent between the inner member and the outer member operable to maintain the members in rotational driving engagement with one another below a certain overload torque between the members, each detent including a driving member that slides radially in an opening in the inner member between an engaged position, in which the driving member is seated in a recess of the outer member in driving engagement with the recess, and a disengaged position, in which the driving member is retracted from the recess and the outer member is continuously rotatable relative to the inner member, the driving member being moved radially outwardly to engage in the recess by a spring that exerts an axial spring force that biases the driving member into the engaged position; a seal extending between the
  • the clutch may further include a plurality of impressions on the surface of the driving member (or other members engaging the driving member) to prevent fretting corrosion.
  • the outer member may have at least three recesses for engaging at least three detents and at least three projecting lobes on the coupler.
  • the at least three projecting lobes may allow the coupler to tilt with respect to the outer member to allow for axial misalignment between the gearbox and common drive shaft.
  • coupler may also have the at least three projecting lobes on a first end of the coupler, the coupler having a flanged connection on the opposite end of the coupler adapted to receive a shaft from the gearbox, the flanged connection having a threaded aperture for receiving a threaded fastener to connect the coupler to the shaft.
  • the seal may further include at least three lobes received within the at least three recesses of the outer member.
  • the seal can also have a
  • circumferentially extending lip that engages the outer member, a second lip engaging the inner member, and/or a circumferential rib extending from the seal in an axial direction which engages a mating circumferential recess on the inner housing.
  • the clutch may generally have an outer member; an inner member radially inward of the outer member; at least one detent between the inner member and the outer member operable to maintain the members in rotational driving engagement with one another below a certain overload torque between the members, each detent including a driving member that slides radially in an opening in the inner member between an engaged position, in which the driving member is seated in a recess of the outer member in driving engagement with the recess, and a disengaged position, in which the driving member is retracted from the recess and the outer member is continuously rotatable relative to the inner member, the driving member being moved radially outwardly to engage in the recess by a spring that exerts an axial spring force that biases the driving member into the engaged position; an actuator ring axially between the driving member and the spring, the spring biasing the actuator ring so as to cam the driving member on the actuator ring radially
  • a clutch assembly for selectively connecting a drive shaft of an agricultural implement to a gearbox.
  • the clutch assembly may generally include an outer member defining a recess; an inner member radially inward of the outer member and adapted to be received on the drive shaft, the inner member defining an opening; at least one detent between the inner member and the outer member operable to maintain the inner member and the outer member in rotational driving engagement below a torque threshold, each detent including a driving member operable to slide radially in the opening in the inner member between an engaged position, in which the driving member is seated in the recess of the outer member in driving engagement with the recess, and a disengaged position, in which the driving member is disengaged from the recess and the outer member is rotatable relative to the inner member; a spring operable to exert an axial spring force biasing the driving member radially outwardly toward the engaged position; a seal extending between the inner member and the outer member, the seal having a portion
  • a torque overload clutch assembly may generally include an outer member defining a recess; an inner member radially inward of the outer member and defining an opening; and a detent between the inner member and the outer member operable to maintain the inner member and the outer member in rotational driving engagement below a torque threshold, the detent including a driving member operable to slide radially in the opening in the inner member between an engaged position, in which the driving member is seated in the recess of the outer member in driving engagement with the recess, and a disengaged position, in which the driving member is disengaged from the recess and the outer member is rotatable relative to the inner member, the driving member having a first surface engageable with the inner member and a second surface engageable with the outer member, at least one of the first surface and the second surface being interrupted.
  • FIG. 1 is a perspective view of an overload clutch assembly connecting a main power shaft of an implement to a gearbox of a corn head row unit.
  • FIG. 2 is a perspective view of the clutch assembly of FIG. 1 with the housing being shown as translucent to illustrate components within the housing.
  • FIG. 3 is an exploded view of the coupler shown in FIG. 2 adjacent a driven shaft of the gearbox of FIG. 1.
  • FIG. 4 is a cross-sectional view of the clutch assembly of FIG. 2.
  • FIG. 5 is a perspective view of the clutch assembly of FIG. 4 with some internal components not illustrated to better illustrate the internal hub and pawls.
  • FIG. 6 is an end view of the clutch assembly as shown in FIG. 5.
  • FIG. 7 is a perspective view of the coupler shown in FIG. 2.
  • FIG. 8 is an end view of the coupler shown in FIG. 7.
  • FIG. 9 is a side view of the coupler shown in FIG. 2.
  • FIG. 10 is a partial cross-sectional view of the clutch assembly housing, inner hub, and seal.
  • FIG. 11 is a partial cross-sectional perspective view of the clutch assembly housing, inner hub, and seal of FIG. 10.
  • FIG.12 is a first end view of the seal of FIGS. 4 and 10-11.
  • FIG. 13 is an opposite end view of the seal of FIG. 12.
  • FIG. 14 is a perspective view of a pawl embodying independent aspects of the present invention.
  • FIG. 15 is a side view of the pawl of FIG. 14.
  • FIG. 16 is another side view of the pawl of FIG. 14. DETAILED DESCRIPTION
  • FIG. 1 illustrates one independent embodiment of a torque overload clutch assembly 10 coupled to main power shaft 12 of an implement, such as a com row unit.
  • the clutch assembly 10 has an outer housing 14 and an inner hub 16.
  • the inner hub 16 is rotatable relative to the housing 14 and has its inner end 18 contained within the housing 14.
  • the inner hub 16 has an aperture with a mating shape to the main power shaft 12.
  • a series of elements are positioned between the inner hub 16 and the housing 14 to selectively transmit rotational movement from the inner hub 16 to the housing 14.
  • typical clutch components can be utilized.
  • the clutch configuration of U. S. Patent No. 7,794,329 the entire contents of which is hereby incorporated by reference, can be utilized.
  • detent arrangements are provided by each of three pawls 20 received in a corresponding radially extending slot 22 in the inner end 18 to transmit torque between the hub 16 and housing 14.
  • the illustrated slots 22 are open at their rear ends.
  • Each pawl 20 is a driving member having a ramped surface 24 that cams on a mating ramped surface 26 of an actuator ring 28.
  • the actuator ring 28 is biased axially toward the pawls 20 by a spring assembly including, in the illustrated construction, multiple disc springs 30 having a regressive spring rate as described in U. S. Patent No. 6,447,397, the entire contents of which is hereby incorporated by reference.
  • the pawls 20 are provided with an interrupted surface having a plurality of impressions, such as dimples, other recesses or projections, series of cuts or grooves, etc. Such impressions may help prevent fretting corrosion, which can be common between a pawl and the hub 16. The impressions on the surface may help to maintain a lubricant between the pawl 20 and the hub 16, which prevents fretting corrosion.
  • all surfaces of the pawl 20 having contact with another metal surface of the clutch assembly 10 have such impressions.
  • the surfaces of the clutch assembly 10 engaging the pawl 20 can be interrupted (e.g., provided with impressions).
  • a ring shaped thrust bearing 32 is positioned inside the housing 14, outside of the actuator ring 28 and between the outer ends of the pawls 20 and the axially inner side of a split retainer ring 34 snapped into an internal groove 36 in the housing 14.
  • the thrust bearing 32 bears on the adjacent axially facing surface of end 18 on its left side, as viewed in FIG. 4, and on the ring 34 on its right side if the inner member 16 is attempted to be pulled out of the outer member 14.
  • the retainer 34 captures the end 18 and the pawls 20 inside of the housing 14 and reacts against any excessive thrust loads the hub 16 exerts on the housing 14, that tend to pull the hub 16 axially out of the housing 14.
  • each pawl 20 has a steeply ramped outer corner engaged with a mating steeply ramped surface 50 formed in the interior surface of the housing 14. If a torque is exerted on the hub 16, the torque is exerted from the hub 16, through the pawls 20 bearing on the surfaces 50 to the housing 14.
  • the pawls 20 cam on the surfaces 50 and are pushed radially inwardly. In doing so, the pawls 20 cam on the ramped surface 26 of the ring 28, which urges the ring 28 axially away from the pawls 20 against the bias of the disc springs 30, permitting relative rotation of the hub 16 and housing 14 when the pawls 20 disengage from the surfaces 50.
  • the clutch assembly 10 drives a coupler 52 which is utilized, in a preferred embodiment, to drive the gearbox 54 of a corn head row unit.
  • the coupler 52 engages a driven shaft 56 of the gearbox 54. Rotation of the coupler 52 causes rotation of the driven shaft 56 and transmits power to the gearbox 54.
  • the coupler 52 is best shown in FIGS. 2, 4, and 7-9.
  • the illustrated coupler 52 is particularly adapted to work with the illustrated housing 14.
  • the housing 14 has three slots 22 for receiving and housing the pawls 20.
  • the coupler 52 has three lobes 58 sized and configured to be received within the slots 22 adjacent the inner end 18 of the inner hub 16.
  • These lobes 58 are particularly useful for an application with a corn head row unit. On a single implement, radial and angular misalignment can occur due to a continuous shaft 12 running through multiple clutch assemblies 10 associated with multiple individually mounted gearboxes 54 (associated with each corn head row unit).
  • the lobes 58 within the slots 22 allow for some angular and/or radial misalignment while still providing a driving engagement between the housing 14 and the gearbox 54.
  • the coupler 52 can tilt or pivot via the engagement between the three lobes 58 and the three slots 22 to allow for such misalignment.
  • the lobes 58 have an arced portion 60 (or are provided with a curved profile) in the axial direction to allow for such tilting, pivoting, and/or misalignment.
  • the lobed end of the coupler 52 is located within a portion of the housing 14 that is axially longer than the lobed end of the coupler 52 to allow for the tilting and pivoting (best shown in FIG. 4).
  • the lobed end of the coupler 52 is retained within the housing 14 by a split retainer ring 64 received within an internal groove 66 in the housing 14.
  • the coupler 52 has an axial ridge 68 sized and configured to be received between the two ends of the split retainer ring 64. This ridge 68 prevents the split retainer ring 64 from rotating within the housing 14.
  • the illustrated coupler 52 has a one piece design, which provides simplicity.
  • the coupler 52 has a bore 62 extending therethrough in axial direction of the drive shaft 12. This bore 62 is sized and dimensioned to allow the drive shaft 12 to easily pass through without contact, even with some degree of misalignment between the housing 14 and the gearbox 54.
  • the opposite end of the coupler 52 has a bore sized and configured to receive the driven shaft 56 of the gearbox 54, as best shown in FIG. 3.
  • This end has two flanges 70 adapted to receive two threaded fasteners 72.
  • one of the flanged ends is provided with a bore sized to receive the threaded fastener 72.
  • the other flanged end is tapped to threadingly receive the threaded fasteners 72.
  • the two flanges 70 are separated by a cutout 74 which allows the flanged ends to deform and grip the driven shaft 56 upon fastening of the threaded fasteners 72.
  • the driven shaft 56 can also include slots 76 particularly adapted for receiving a portion of the threaded fasteners 72.
  • the clutch assembly 10 also includes a seal 80 to protect the clutch components from environmental contamination.
  • the seal 80 also functions to retain lubricant among the clutch components so as to not require separate grease fittings to provide lubrication.
  • the seal 80 is generally disc-shaped with a central aperture 82 and three radially projecting lobes 84 sized and configured to fit tightly within the slots 22 of the housing 14.
  • the outer diameter of the seal 80 is sized and configured to form a friction fit or interference fit with the housing 14.
  • the seal 80 is provided with a generally radially extending flexible lip 86 to snugly engage the housing 14 and allow tolerance variation while maintaining a sealed engagement with the housing 14.
  • the seal 80 further axially seals the clutch components from the environment via engagement with the end 18 of the inner hub 16. As illustrated, the seal 80 abuts the face of the end 18. Furthermore, the seal 80 includes an axially-extending projection 88
  • the seal 80 includes a radially extending flexible lip 92 that extends about the inner circumference of the seal 80 and engages the face of the end 18. This engagement of the lip 92 and the projection 88 of the seal 80 against the face of the end 18 forms a labyrinth design to inhibit or prevent ingress of environmental materials into the clutch components along the interface between the seal 80 and the end 18.
  • the seal 80 is retained within the housing 14 by a split retainer ring 94 received within an internal groove 96 in the housing 14.
  • the engagement between the split retainer ring 94 and the groove 96 is positioned to hold the seal 80 in engagement with the face of the end 18 of the inner hub 16.
  • the seal 80 is further provided with an axially-extending projection 98 to at least partially define a circumferential slot 100 housing the split retainer ring 94.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

Ensemble embrayage destiné à relier sélectivement un arbre d'entraînement d'un outil agricole à une boîte de vitesses d'une unité de rangée individuelle sur l'outil. L'ensemble embrayage peut comprendre un élément intérieur pour liaison à l'arbre d'entraînement, un élément extérieur sélectivement alimenté par l'élément intérieur par l'intermédiaire de composants d'embrayage, et un organe d'accouplement reliant l'élément extérieur à la boîte de vitesses. L'organe d'accouplement peut être conçu pour être relié à l'élément extérieur de manière à permettre un désalignement axial et/ou radial entre l'élément extérieur et la boîte de vitesses.
PCT/US2017/042482 2016-07-19 2017-07-18 Ensemble embrayage WO2018017512A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662363990P 2016-07-19 2016-07-19
US62/363,990 2016-07-19

Publications (1)

Publication Number Publication Date
WO2018017512A1 true WO2018017512A1 (fr) 2018-01-25

Family

ID=59416831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2017/042482 WO2018017512A1 (fr) 2016-07-19 2017-07-18 Ensemble embrayage

Country Status (1)

Country Link
WO (1) WO2018017512A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6447397B1 (en) 2000-10-13 2002-09-10 Weasler Engineering, Inc. Detent torque overload clutch
US20050103592A1 (en) * 2003-10-13 2005-05-19 Klaus Kampf Coupling used for torque limiting purposes
EP2136095A1 (fr) * 2008-06-20 2009-12-23 GKN Walterscheid GmbH Couplage destiné à la limitation du couple
EP2221495A1 (fr) * 2004-05-03 2010-08-25 Weasler Engineering, Inc. Embrayage de surcharge de couple amélioré
EP2436944A2 (fr) * 2010-09-29 2012-04-04 Actuant Corporation Embrayage de surcharge de couple automatique
JP2014035074A (ja) * 2012-08-10 2014-02-24 Matsui Mfg Co 駆動軸組立体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6447397B1 (en) 2000-10-13 2002-09-10 Weasler Engineering, Inc. Detent torque overload clutch
US20050103592A1 (en) * 2003-10-13 2005-05-19 Klaus Kampf Coupling used for torque limiting purposes
EP2221495A1 (fr) * 2004-05-03 2010-08-25 Weasler Engineering, Inc. Embrayage de surcharge de couple amélioré
US7794329B2 (en) 2004-05-03 2010-09-14 Weasler Engineering, Inc. Torque overload clutch
EP2136095A1 (fr) * 2008-06-20 2009-12-23 GKN Walterscheid GmbH Couplage destiné à la limitation du couple
EP2436944A2 (fr) * 2010-09-29 2012-04-04 Actuant Corporation Embrayage de surcharge de couple automatique
JP2014035074A (ja) * 2012-08-10 2014-02-24 Matsui Mfg Co 駆動軸組立体

Similar Documents

Publication Publication Date Title
EP2585729B1 (fr) Perfectionnements apportés à des accouplements anti-marche arrière ou s'y rapportant
US7607526B2 (en) Anti-reverse input clutch
CA2754096C (fr) Limiteur de couple automatique
US9772030B2 (en) Split gear assembly with one-way roller clutch for controlling backlash in opposed-piston engines
EP2221495B1 (fr) Embrayage de surcharge de couple amélioré
CN109278035B (zh) 舵机及机器人
US7878316B2 (en) High torque one way clutch
GB2424046A (en) One-way clutch with reaction surfaces
EP1197671B1 (fr) Mécanisme de détente radiale pour couple d'embrayage à surcharge
US3513712A (en) Power take-off assembly
US7198144B2 (en) Manually adjustable clutch assembly
US4269294A (en) Automatic clutch
WO2018017512A1 (fr) Ensemble embrayage
US6745882B2 (en) Locking clutch
US6076429A (en) Clutch for a differential
JPH08247173A (ja) ローラクラッチ
JPS5810034Y2 (ja) 無段変速プ−リ
US20200400203A1 (en) One-way clutch
CN111801508B (zh) 单向离合器
US5799764A (en) Cage having a bearing for use in a one-way clutch
CN113187830A (zh) 超越离合器及具有其的工程机械
US20030121747A1 (en) Locking clutch
GB2608317A (en) A device
JP2021067286A (ja) 逆入力防止クラッチ
US20030121746A1 (en) Locking clutch

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17745596

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17745596

Country of ref document: EP

Kind code of ref document: A1