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WO2009001191A2 - Embrayage a griffes - Google Patents

Embrayage a griffes Download PDF

Info

Publication number
WO2009001191A2
WO2009001191A2 PCT/IB2008/001619 IB2008001619W WO2009001191A2 WO 2009001191 A2 WO2009001191 A2 WO 2009001191A2 IB 2008001619 W IB2008001619 W IB 2008001619W WO 2009001191 A2 WO2009001191 A2 WO 2009001191A2
Authority
WO
WIPO (PCT)
Prior art keywords
engagement member
teeth
dog clutch
state
line
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.)
Ceased
Application number
PCT/IB2008/001619
Other languages
English (en)
Other versions
WO2009001191A3 (fr
Inventor
Hiroaki Ebuchi
Hidetoshi Aoki
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of WO2009001191A2 publication Critical patent/WO2009001191A2/fr
Publication of WO2009001191A3 publication Critical patent/WO2009001191A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F16D27/118—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with interengaging jaws or gear teeth
    • 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
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D2011/006—Locking or detent means, i.e. means to keep the clutch in engaged condition
    • 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
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D2011/008—Clutches in which the members have interengaging parts characterised by the form of the teeth forming the inter-engaging parts; Details of shape or structure of these teeth
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/10462—Dog-type clutch
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3022—Current
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/501—Relating the actuator
    • 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
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/70418—Current

Definitions

  • the invention relates to a dog clutch in which a teeth line provided in one of a pair of engagement members meshes with a teeth line provided in the other of the pair of the engagement members, when the dog clutch is in an engaged state.
  • JP-A-8-4789 describes an electromagnetic clutch that includes an armature with internal teeth, a clutch gear with external teeth, and a spring that presses the armature so that the armature is disengaged from the clutch gear.
  • an electric current is supplied to an electromagnet to move the armature resisting the force of the spring, the armature is engaged with the clutch gear.
  • the invention provides a dog clutch that reduces energy consumed after the state of the dog clutch is changed to an engage state.
  • An aspect of the invention relates to a dog clutch that includes a first engagement member and a second engagement member.
  • a plurality of teeth are formed on an entire outer periphery of the first engagement member to form a teeth line.
  • the first engagement member is rotated around an axis.
  • the second engagement member is disposed coaxially with the first engagement member.
  • a plurality of teeth are formed on an entire inner periphery of the second engagement member to form a teeth line that meshes with the teeth line of the first engagement member.
  • the state of the dog clutch is changed between an engaged state in which the teeth line of the first engagement member meshes with the teeth line of the second engagement member, and a disengaged state in which the first engagement member and the second engagement member are away from each other, by moving at least one of the first engagement member and the second engagement member in a direction of the axis.
  • a protruding portion which protrudes in a circumferential direction, is provided in at least one tooth among the teeth of the second engagement member so that a recessed portion is formed in the protruding portion.
  • At least a portion of the tooth of the first engagement member is housed in the recessed portion of the at least one tooth among the teeth of the second engagement member so that at least the portion of the tooth of the first engagement member overlaps with the at least one tooth among the teeth of the second engagement member, when the teeth line of the first engagement member meshes with the teeth line of the second engagement member.
  • the recessed portion is formed in the at least one tooth among the teeth provided in the second engagement member. Therefore, when the dog clutch is in the engaged state, at least the portion of the tooth of the first engagement member is housed in the recessed portion of the at least one tooth among the teeth of the second engagement member so that at least the portion of the tooth of the first engagement member overlaps with the at least one tooth among the teeth of the second engagement member.
  • one of the first engagement member and the second engagement member restricts the movement of the other of the first engagement member and the second engagement member away from the one of the first engagement member and the second engagement member. Therefore, it is possible to reduce energy consumed to engage the first engagement member with the second engagement member.
  • the protruding portion may be provided in each of a plurality of teeth that are a part of all the teeth of the second engagement member. Further, the protruding portions, which are provided in the teeth of the second engagement member, may be disposed at constant intervals in the circumferential direction. Also, the protruding portion may be provided in each of all the teeth of the second engagement member.
  • the dog clutch may include an electromagnetic device that includes a coil portion, and that moves at least one of the first engagement member and the second engagement member in the direction of the axis using a magnetic power generated in the coil portion, thereby changing the state of the dog clutch from the disengaged state to the engaged state; and a control device that controls the electric current supplied to the coil portion so that the electric current supplied to the coil portion during a period after the teeth line of the first engagement member meshes with the teeth line of the second engagement member is smaller than the electric current supplied to the coil portion during a period in which at least one of the first engagement member and the second engagement member is moved in the direction of the axis until each of the teeth of the second engagement member is inserted between a corresponding pair of the adjacent teeth of the first engagement member, when the state of the dog clutch is changed from the disengaged state to the engaged state.
  • one of the first engagement member and the second engagement member restricts the movement of the other of the first engagement member and the second engagement member away from the one of the first engagement member and the second engagement member, This reduces the electric current supplied to the coil portion. Therefore, it is possible to reduce the energy consumed to change the state of the dog clutch to the engaged state, and to reduce the energy consumed after the state of the dog clutch is changed to the engaged state.
  • the control device may stop supply of the electric current to the coil portion after the teeth line of the first engagement member completely meshes with the teeth line of the second engagement member. By stopping supply of the electric current, it is possible to further reduce the energy consumed after the state of the dog clutch is changed to the engaged state.
  • one of the first engagement member and the second engagement member restricts the movement of the other of the first engagement member and the second engagement member away from the one of the first engagement member and the second engagement member. Therefore, it is possible to reduce the energy consumed after the state of the dog clutch is changed to the engaged state.
  • FIG. 1 is a diagram showing a main portion of a transmission in which a dog clutch according to a first embodiment of the invention is provided;
  • FIG. 2 is a diagram showing the dog clutch in an engaged state, seen from a left side in FIG. 1;
  • FIG. 3 is a diagram showing an enlarged portion of the dog clutch in FIG. 2;
  • FIG. 4 is a flowchart showing a clutch control routine executed by an ECU in FIG. 1;
  • FIG. 5 is a diagram schematically showing a dog clutch according to a second embodiment of the invention.
  • FIG. 6 is a diagram showing a cross section of the dog clutch taken along the line VI-VI in FIG. 5.
  • FIG. 1 shows a main portion of a transmission 100 in which a dog clutch 1OA is provided.
  • the transmission 100 is a known transmission that is generally provided in a vehicle, and therefore, the detailed description of the transmission 100 will be omitted.
  • FIG, 2 is a diagram showing the dog clutch IOA seen from the left side in FIG. 1.
  • the dog clutch 1OA includes a gear piece 20 that functions as the first engagement member; a sleeve 30 that functions as the second engagement member; and a drive device 40 that drives the sleeve 30 in the direction of an axis CL.
  • the gear piece 20 is rotatable around the axis CL.
  • a plurality of teeth 22 are formed on an entire outer periphery of the gear piece 20 to form a teeth line 21.
  • the sleeve 30 is disposed around the axis CL, as well as the gear piece 20. That is, the sleeve 30 is disposed coaxially with the gear piece 20.
  • a plurality of teeth 32 are formed on an entire inner periphery of the sleeve 30 to form a teeth line 31 that meshes with the teeth line 21 of the gear piece 20.
  • each of the teeth 32 of the sleeve 30 has a larger width than that of each of the teeth 22 of the gear piece 20.
  • a teeth line 33 is formed on an entire outer periphery of the sleeve 30. As shown in FIG. 2, the teeth line 33 meshes with another gear.
  • FIG. 3 is a diagram showing an enlarged region A in FIG. 2.
  • a protruding portion 34 which protrudes in a circumferential direction, is provided in each of teeth 32a that are a part of the teeth 32 of the sleeve 30.
  • the protruding portion 34 is formed so that a recessed portion 35 is formed in each tooth 32a.
  • the protruding portion 34 is provided in one side of each tooth 32a in a width direction so that the portion of the tooth 22 of the gear piece 20 is inserted in the recessed portion 35, that is, the protruding portion 34 is provided in a left end of each tooth 32a in FIG 3.
  • the portion of the tooth 22 is fitted in the recessed portion 35 of each tooth 32a of the sleeve 30, and therefore, the tooth 22 partially overlaps with the tooth 32a.
  • the protruding portion 34 in which the recessed portion 35 is formed should be provided in each of a plurality of teeth 32a that are a part of the teeth 32 of the sleeve 30. Further, the protruding portion 34 may be provided in each of all the teeth 32. Also, it is preferable that the protruding portions 34, which are provided in the teeth 32a that are a part of the teeth 32, should be uniformly disposed, that is, at constant intervals.
  • the drive device 40 includes a plunger 41, an electromagnet 42, and a return spring 43.
  • the plunger 41 is fitted to the sleeve 30 so that the plunger 41 moves integrally with the sleeve 30 in the direction of the axis CL.
  • the electromagnet 42 drives the plunger 41 so that the sleeve 30 moves leftward in FIG. 1, that is, the sleeve 30 moves to be engaged with the gear piece 20.
  • the return spring 43 presses the plunger 41 so that the sleeve 30 moves rightward in FIG. 1, that is, the sleeve 30 moves away from the gear piece 20.
  • the electromagnet 42 includes a coil portion 42a that generates a magnetic force when an electric current is supplied to the coil portion 42a.
  • Operation of the electromagnet 42 is controlled by an engine control unit (ECU) 50 that functions as the control device.
  • the ECU 50 is configured as a computer that includes a microprocessor, and peripheral devices such as a RAM and a ROM, which are required for the operation of the microprocessor.
  • the ECU 50 is a known computer unit that controls the operating state of an engine (not shown), based on signals output from sensors provided in the engine provided in the vehicle.
  • the ECU 50 is connected to, for example, an accelerator pedal operation amount sensor 51 that outputs a signal corresponding to an accelerator pedal operation amount.
  • the ECU 50 is connected to the other sensors (not shown).
  • FIG. 4 shows a clutch control routine executed to change the state of the dog clutch IOA from a disengaged state to the engaged state.
  • the clutch control routine is executed at predetermined time intervals during the operation of the dog clutch 1OA.
  • the control routine in FIG 4 is executed in parallel with other control routines executed by the ECU 50.
  • step SIl the ECU 50 determines whether a clutch engagement condition for changing the state of the dog clutch 1OA to the engaged state is satisfied. This determination is performed based on, for example, a traveling state of the vehicle and torque requested by a driver, in a known manner. When it is determined that the clutch engagement condition is unsatisfied, the current control routine ends. When it is determined that the clutch engagement condition is satisfied, the routine proceeds to step S 12. In step S 12, the ECU 50 executes an engagement preparation process for changing the state of the dog clutch 1OA to the engaged state.
  • step S 13 operation of a resolver 101 provided in the transmission 100 is controlled to adjust the phases of the sleeve 30 and the gear piece 20 so that each tooth 22 of the gear piece 20 can be inserted between a corresponding pair of the adjacent teeth 32 of the sleeve 30.
  • step S 13 the ECU 50 supplies the electric current to the electromagnet 42 so that the sleeve 30 moves leftward in HG. 1 along the axis CL.
  • step S 14 the ECU 50 determines whether the sleeve 30 has been engaged with the gear piece 20, that is, the state of the dog clutch 1OA has been changed to the engaged state as shown in FIG. 2.
  • the routine returns to step S 13.
  • the processes in step S 13 and step S 14 are repeatedly executed until the state of the dog clutch 1OA is changed to the engaged state.
  • the routine proceeds to step S15.
  • step S15 the ECU 50 stops supply of electric power to the electromagnet 42. Then, the current control routine ends.
  • the protruding portion 34 is provided in each of teeth 32a that are a part of the teeth 32 provided in the sleeve 30, and the recessed portion 35 is formed in the protruding portion 34. Therefore, when the dog clutch 1OA is in the engaged state, the portion of the tooth 22 of the gear piece 20 is fitted in the recessed portion 35. In this case, when the sleeve 30 is about to move rightward in FIG. I 5 the gear piece 20 prevents the rightward movement of the sleeve 30. Because the movement of the sleeve 30 away from the gear piece 20 is restricted in this manner, the supply of electric power to the electromagnet 42 is stopped.
  • the supply of electric power to the electromagnet 42 may not be stopped.
  • the electric current may continued to be supplied to the electromagnet 42 in a manner such that the electric current supplied to the electromagnet 42 after the state of the dog clutch 1OA is changed to the engaged state is smaller than the electric current supplied to the electromagnet 42 when the state of the dog clutch 1OA is changed from the disengaged state to the engaged state. In this case, it is possible to reliably keep the sleeve 30 engaged with the gear piece 20, while reducing the energy consumed after the state of the dog clutch 1OA is changed to the engaged state.
  • FIG. 5 shows a dog clutch 1OB according to the second embodiment.
  • FIG. 6 shows a cross section of the dog clutch 1OB taken along the line VI-VI in FIG. 5.
  • the same and corresponding portions as in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
  • the drive device 40 is provided in the dog clutch 1OB in the second embodiment, and the drive device 40 drives the sleeve 30 in the direction of the axis CL.
  • the protruding portions 34 are provided in each of all the teeth 32 of the sleeve 30.
  • the protrusion portion 34 is formed in each of a right side and a left side of the tooth 32.
  • the recessed portion 35 is formed in each of the right side and the left side of the tooth 32.
  • the invention is not limited to the above-described embodiments.
  • the invention may be realized in various embodiments.
  • the device in which the dog clutch according to the invention is provided is not limited to the transmission.
  • the dog clutch according to the invention may be provided in any device, as long as power is transmitted from an input shaft to an output shaft of the device.
  • the device driven by the drive device is not limited to the sleeve.
  • the drive device may drive the gear piece in the axial direction, or may drive both of the sleeve and the gear piece in the axial direction.

Landscapes

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

Abstract

L'invention concerne un embrayage à griffes (10A) comprenant : une pièce d'engrenage (20) pourvue d'une pluralité de dents (22) formées sur un périmètre externe pour constituer une ligne de dents (21); et un manchon (30) pourvu d'une pluralité de dents (32) formées sur un périmètre interne pour former une ligne de dents (31) s'engrenant avec la ligne de dents (21) de la pièce d'engrenage (20). La position de l'embrayage à griffes (10A) est changée entre une position enclenchée et une position désenclenchée, par le déplacement du manchon (30) dans le sens d'un axe (CL). Une partie saillante (34) faisant saillie dans un sens circonférentiel est formée sur au moins une dent (32a) du manchon (30) de sorte qu'une partie renfoncée (35) soit formée sur ladite partie saillante (34). Au moins une partie de la dent (22) de la pièce d'engrenage (20) est accueillie dans la partie renfoncée (35) de sorte qu'au moins ladite partie de la dent (22) de la pièce d'engrenage (20) chevauche sur ladite dent au moins (32a) du manchon (30) lorsque les lignes de dents (21, 31) s'engrènent.
PCT/IB2008/001619 2007-06-22 2008-06-20 Embrayage a griffes Ceased WO2009001191A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007164843A JP2009002450A (ja) 2007-06-22 2007-06-22 噛み合い式クラッチ
JP2007-164843 2007-06-22

Publications (2)

Publication Number Publication Date
WO2009001191A2 true WO2009001191A2 (fr) 2008-12-31
WO2009001191A3 WO2009001191A3 (fr) 2009-02-19

Family

ID=40020264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/001619 Ceased WO2009001191A2 (fr) 2007-06-22 2008-06-20 Embrayage a griffes

Country Status (2)

Country Link
JP (1) JP2009002450A (fr)
WO (1) WO2009001191A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022253402A1 (fr) * 2021-05-31 2022-12-08 Gkn Automotive Ltd. Procédé de commande d'un groupe motopropulseur et groupe motopropulseur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6681321B2 (ja) * 2016-12-07 2020-04-15 ジヤトコ株式会社 噛合式係合装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0321824D0 (en) * 2003-09-18 2003-10-15 Zeroshift Ltd Electromagnetic engagement mechanism
DE102005027772B4 (de) * 2005-06-15 2016-08-25 Volkswagen Ag Wechselgetriebe für ein Fahrzeug, insbesondere für ein Kraftfahrzeug
US7992698B1 (en) * 2005-11-11 2011-08-09 Volvo Lastvagnar Ab System for preventing gear hopout in a tooth clutch in a vehicle transmission
BRPI0605265A (pt) * 2005-12-09 2007-10-09 Omfb S P A Hydraulic Component dispositivo de engate para tomadas de potência, tomada de potência, método para operar conjunto de engate de tomada de potência
US7599778B2 (en) * 2006-04-22 2009-10-06 Juan Zak Transmission with intelligent gear synchronization and shifting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022253402A1 (fr) * 2021-05-31 2022-12-08 Gkn Automotive Ltd. Procédé de commande d'un groupe motopropulseur et groupe motopropulseur
US12173762B2 (en) 2021-05-31 2024-12-24 Gkn Automotive Limited Powertrain method and apparatus

Also Published As

Publication number Publication date
JP2009002450A (ja) 2009-01-08
WO2009001191A3 (fr) 2009-02-19

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