WO2019107874A1 - Actionneur d'embrayage à structure de décélération de glissière de came - Google Patents

Actionneur d'embrayage à structure de décélération de glissière de came Download PDF

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Publication number
WO2019107874A1
WO2019107874A1 PCT/KR2018/014714 KR2018014714W WO2019107874A1 WO 2019107874 A1 WO2019107874 A1 WO 2019107874A1 KR 2018014714 W KR2018014714 W KR 2018014714W WO 2019107874 A1 WO2019107874 A1 WO 2019107874A1
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WO
WIPO (PCT)
Prior art keywords
slider
cam slider
clutch actuator
contact
nut
Prior art date
Application number
PCT/KR2018/014714
Other languages
English (en)
Inventor
Hee Rak Lee
Ju Hyung Na
Original Assignee
Pyong Hwa Valeo Co., Ltd.
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 Pyong Hwa Valeo Co., Ltd. filed Critical Pyong Hwa Valeo Co., Ltd.
Publication of WO2019107874A1 publication Critical patent/WO2019107874A1/fr

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    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms

Definitions

  • the present disclosure relates to an actuator that provides an operating force to a clutch for power intermittence, and more particularly, to a clutch actuator with cam slider deceleration structure, capable of obtaining a constant reduction ratio or variably controlling a reduction ratio according to the setting of a profile of a contact surface of a cam slider in contact with a nut slider.
  • an automatic manual transmission developed as a middle concept between a manual transmission and an automatic transmission may automatically realize power intermittence for shifting through the operation control of an actuator while having a gear train similar to that of the existing manual transmission.
  • Examples of the automatic manual transmission may include an automated manual transmission (AMT), a double clutch transmission (DCT), and the like.
  • the above automatic manual transmission necessarily requires an actuator capable of performing displacement adjustment in a rectilinear direction for power intermittence, and most actuators are configured to realize stroke adjustment in a rectilinear direction through the forward/reverse drive control of a motor.
  • the hydraulic clutch actuator disclosed in Korean Patent No. 10-1489500 includes a piston that generates a hydraulic pressure in the fluid introduced into a master cylinder, a feed nut that is movably integrated with the piston, a feed guide that guides the rectilinear movement of the feed nut while supporting the axial rotation thereof, a feed screw that reciprocates the feed nut, and a drive motor that axially rotates the feed screw.
  • the output stroke of the feed nut relative to the input stroke of the feed screw by the drive motor is always constant under the condition that the rotational speed of the drive motor is the same. Therefore, the operating force provided to the piston for generating the hydraulic pressure is always the same, and any gain cannot be expected at all in generating the force for generating the hydraulic pressure.
  • a clutch actuator with cam slider deceleration structure which includes a lead screw rotated by a drive motor, a nut slider engaged to the lead screw and movably installed in a rectilinear direction relative to a housing, a cam slider movably installed in a direction of operation of a hydraulic cylinder by interlocking through contact with the nut slider, a roller unit installed to the nut slider to come into rolling contact with a contact surface of the cam slider, a guide unit for guiding the movement of the cam slider in the direction of operation of the hydraulic cylinder, and a push rod installed to the cam slider to press a piston of the hydraulic cylinder.
  • the nut slider may include an idle roller for rolling contact in the housing.
  • the housing may include a first guide for guiding rectilinear movement of the nut slider, and a first plate member inserted into a first slit groove of the first guide for rolling contact with the idle roller.
  • the contact surface of the cam slider may be of an inclined structure for interlocking with the nut slider.
  • the contact surface may have a rectilinear or curved profile.
  • the guide unit may include first and second idle rollers axially coupled to the cam slider and spaced apart from each other, and the first and second idle rollers may be arranged to set their contact portions with the housing to mutually opposite positions.
  • the housing may include a second guide for guiding rectilinear movement of the first and second idle rollers, and second plate members inserted into respective second slit grooves of the second guide for individual rolling contact with the first and second idle rollers, and the second slit grooves and the second plate members may be in contact with the first and second idle rollers at mutually opposite positions.
  • the hydraulic cylinder may include a return spring installed to provide a repulsive force toward the push rod to the piston.
  • a clutch actuator with cam slider deceleration structure can maintain a reduction ratio at a constant level or variably control the reduction ratio according to which the profile of the inclined contact surface of a cam slider in contact with a nut slider is set in a rectilinear or curved shape.
  • the present disclosure can significantly reduce noise involved during the operation of the clutch actuator through the rolling contact between friction portions by the idle rollers included in the respective nut slider and cam slider, it is possible to ensure the quiet operation of components.
  • the present disclosure can guide the movement of the cam slider by the guide unit in a direction accurately coinciding with the direction of operation of a hydraulic cylinder, it is possible to more stably ensure the operating performance of the clutch actuator.
  • Fig. 1 is a perspective view illustrating a clutch actuator with cam slider deceleration structure according to an embodiment of the present disclosure.
  • Fig. 2 is a perspective view illustrating an internal configuration of the clutch actuator of Fig. 1, from which a drive motor and a hydraulic cylinder are removed together with a partial housing.
  • Fig. 3 is a cross-sectional view illustrating the clutch actuator with cam slider deceleration structure according to the embodiment of the present disclosure.
  • Fig. 4 is a perspective view illustrating main components separated from the clutch actuator of Fig. 2.
  • Fig. 5 is a perspective view illustrating main components separated from the clutch actuator of Fig. 4 in a different direction.
  • Fig. 6 is an exploded perspective view illustrating the main components of the clutch actuator of Fig. 4.
  • a clutch actuator according to an embodiment of the present disclosure is installed between the output side of a drive motor 100 and an input side of a hydraulic cylinder 200 and transmits the operating force generated from the drive motor 100 to the hydraulic cylinder 200 to realize power intermittence operation by a clutch.
  • both of the drive motor 100 and the hydraulic cylinder 200 are fixedly installed to a housing 10, and the housing 10 is of an openable split structure.
  • the clutch actuator according to the embodiment of the present disclosure includes a lead screw 300 and a nut slider 400, a cam slider 500, a guide unit 600, and roller units 700.
  • the lead screw 300 is coupled to the rotary shaft of the drive motor 100 and is rotatably installed in the housing 10.
  • the nut slider 400 is engaged on the outer peripheral surface of the lead screw 300 and is movably installed in a rectilinear direction in the housing 10.
  • the nut slider 400 includes a plurality of idle rollers 410 at the bottom thereof for rectilinear movement in the housing 10, and the idle rollers 410 are installed so as to idle through axial coupling with the nut slider 400.
  • the housing 10 includes a first guide 12 having a separate divided space therein for smoothly guiding the rectilinear movement of the nut slider 400.
  • the idle rollers 410 are configured to minimize noise caused during operation by coming into rolling contact with a first plate member 12b, which is made of a shock absorbing material and is detachably assembled to a first slit groove 12a of the first guide 12.
  • the nut slider 400 includes the roller units 700 on both sides thereof for interlocking through contact with the cam slider 500.
  • the cam slider 500 is movably installed in a rectilinear direction by interlocking through contact with the nut slider 400, and consists of a pair of members spaced at an appropriate distance to avoid interference with the nut slider 400.
  • the cam slider 500 is illustrated as being movably installed in a rectilinear direction crossing the direction of movement of the nut slider 400 in the embodiment of the present disclosure, the present disclosure is not limited thereto.
  • the cam slider 500 may consist of a single member so long as it can avoid interference with the nut slider 400.
  • the cam slider 500 has an inclined contact surface 510 that directly comes into rolling contact with the roller units 700 for interlocking through the movement of the nut slider 400.
  • the cam slider 500 can maintain a reduction ratio to the movement stroke of a push rod 800 resulting from the operation of the drive motor 100 at a constant level or can variably control the reduction ratio according to the setting of the profile of the inclined contact surface 510.
  • the reduction ratio can be maintained at a constant level regardless of the change of the movement stroke of the nut slider 400.
  • the reduction ratio can be variably controlled depending on the change of the movement stroke of the nut slider 400, in which case the reduction ratio is determined according to the (inwardly curved or outwardly curved) geometrical feature of the profile of the contact surface 510.
  • the cam slider 500 is connected through a plurality of support shafts 520 to avoid interference with the nut slider 400.
  • the support shafts 520 also contribute to providing a space for mounting the guide unit 600 and the push rod 800 on the cam slider 500.
  • the cam slider 500 has first through-holes 530 formed for axial coupling with the support shafts 520.
  • the guide unit 600 serves to guide the movement of the cam slider 500 in a rectilinear direction coinciding with the direction of operation of the hydraulic cylinder 200 in the housing 10.
  • the guide unit 600 consists of an idle roller installed so as to idle through axial coupling to the cam slider 500.
  • the guide unit 600 includes first and second idle rollers 610 and 620 that are axially coupled to the cam slider 500 at positions spaced at a predetermined distance in the direction of movement of the cam slider 500 in the housing 10.
  • the first and second idle rollers 610 and 620 are arranged to set the contact portions with the housing 10 to mutually opposite positions.
  • the housing 10 includes a second guide 14 having a separate divided space therein for smoothly guiding the rectilinear movement of the guide unit 600.
  • the second guide 14 has a plurality of second slit grooves 14a formed at mutually opposite positions to accurately guide the direction of movement of the cam slider 500 according to the direction of operation of the hydraulic cylinder 200.
  • Second plate members 14b which are made of a shock absorbing material and are individually in contact with the first and second idle rollers 610 and 620, are detachably assembled to the respective second slit grooves 14a.
  • the second slit grooves 14a and the second plate members 14b are arranged at positions where they may be individually in contact with the first and second idle rollers 610 and 620 in consideration of the movement stroke of the cam slider 500. Accordingly, the first and second idle rollers 610 and 620 can minimize noise caused during the operation of the cam slider 500 by coming into rolling contact with the second plate members 12b which are individually installed to the second slit grooves 14a of the second guide 14.
  • the cam slider 500 has second through-holes 540 formed for axial coupling with the respective first and second idle rollers 610 and 620.
  • the roller units 700 are rotatably installed to the nut slider 400, and are disposed at positions opposite to the contact surface 510 of the cam slider 500 at both sides of the nut slider 400.
  • the roller units 700 are fixed through axial coupling to the nut slider 400 so as to idle.
  • the roller units 700 are illustrated as being individually installed to both sides of the nut slider 400 in the embodiment of the present disclosure, the present disclosure is not limited thereto.
  • the push rod 800 is coupled to interlock with the cam slider 500 to transmit a pressing force to the piston 210 of the hydraulic cylinder 200.
  • the push rod 800 since the push rod 800 is axially coupled to the cam slider 500 through a support shaft 810, the push rod 800 may rectilinearly move by interlocking with the movement of the cam slider 500.
  • the cam slider 500 has a third through-hole 550 formed for axial coupling with the support shaft 810.
  • the hydraulic cylinder 200 includes a return spring 220 installed to provide a repulsive force to the push rod 800 at a position opposite to the contact portion with the push rod 800.
  • the return spring 220 serves to enable the rolling contact between the contact surface 510 of the cam slider 500 and the roller units 700 installed to the nut slider 400 to be always realized by providing a moving force to the cam slider 500 through the push rod 800.
  • the nut slider 400 moves rectilinearly in the axial direction of the lead screw 300, and the contact surface 510 of the cam slider 500 is dependently displaced by the pressing force provided through the contact with the roller units 700.
  • the push rod 800 applies an acting force to the piston 210 of the hydraulic cylinder 200 while moving forward by the movement of the cam slider 500 so that a predetermined hydraulic pressure is generated in the pressure chamber of the hydraulic cylinder 200, thereby enabling the clutch actuator to be operated by the generated hydraulic pressure.
  • the present disclosure can variable control a reduction ratio of the output stroke of the push rod 800 by the movement of the cam slider 500 to the input stroke of the nut slider 400 by the rotation of the drive motor 100 according to the shape of the profile of the contact surface 510 of the cam slider 500. That is, the cam slider 500 can maintain a reduction ratio to the output stroke of the push rod 800 to the input stroke transmitted to the nut slider 400 by the drive motor 100 at a constant level or can variably control the reduction ratio according to the shape of the profile of the inclined contact surface 510. For example, when the profile of the contact surface 510 is rectilinear, the reduction ratio can be maintained at a constant level regardless of the change of the movement stroke of the nut slider 400. On the other hand, when the profile of the contact surface 510 is curved such as being curved inward or outward, the reduction ratio can be variably controlled depending on the change of the movement stroke of the nut slider 400.
  • the guide unit 600 may guide the movement of the cam slider 500 in a rectilinear direction accurately coinciding with the direction of operation of the hydraulic cylinder 200, which is because the first and second idle rollers 610 and 620 may accurately guide the movement of the cam slider 500 in a rectilinear direction throughout the movement stroke thereof by rolling contact with the second plate members 14b.
  • the idle roller 410 included in the nut slider 400 and the first and second idle rollers 610 and 620 included in the cam slider 500 are individually in rolling contact with the first plate member 12b and the second plate members 14b, it is possible to minimize noise caused during the operation of the clutch actuator.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un actionneur d'embrayage à structure de décélération de glissière de came. Ledit actionneur comprend : une vis mère entraînée en rotation par un moteur d'entraînement ; un écrou mobile mis en prise avec la vis mère et installé de façon mobile dans une direction rectiligne par rapport à un logement ; une glissière de came installée de façon mobile dans une direction de fonctionnement d'un vérin hydraulique au moyen d'un verrouillage par l'intermédiaire d'un contact avec l'écrou mobile ; une unité de rouleau installée sur l'écrou mobile de façon à venir en contact par roulement avec une surface de contact de la glissière de came ; une unité de guidage conçue pour guider le déplacement de la glissière de came dans la direction de fonctionnement du vérin hydraulique ; et une tige de poussée installée sur la glissière de came de façon à appuyer sur un piston du vérin hydraulique. Ainsi est-il possible d'obtenir un rapport de réduction constant ou de commander un rapport de réduction de manière variable en fonction du réglage d'un profil de la surface de contact de la glissière de came en contact avec l'écrou mobile.
PCT/KR2018/014714 2017-11-30 2018-11-27 Actionneur d'embrayage à structure de décélération de glissière de came WO2019107874A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0163187 2017-11-30
KR1020170163187A KR102006078B1 (ko) 2017-11-30 2017-11-30 캠 슬라이더 감속 구조를 갖는 클러치 액츄에이터

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WO2019107874A1 true WO2019107874A1 (fr) 2019-06-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020126748A1 (fr) * 2018-12-19 2020-06-25 Valeo Embrayages Actionneur d'embrayage
FR3090771A1 (fr) * 2018-12-19 2020-06-26 Valeo Embrayages Actionneur d’embrayage
FR3090770A1 (fr) * 2018-12-19 2020-06-26 Valeo Embrayages Actionneur d’embrayage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102209980B1 (ko) 2019-07-31 2021-02-03 주식회사평화발레오 자동차의 클러치 액츄에이터

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970045986A (ko) * 1995-12-27 1997-07-26 김옥수 자동차의 풋클러치 자동제어장치
KR20070037193A (ko) * 2005-09-30 2007-04-04 현대자동차주식회사 전기모터식 클러치 액추에이터 구조
EP2336587B1 (fr) * 2009-12-21 2013-01-23 Valeo Embrayages Dispositif d'actionnement à came pour un système d'embrayage à friction
KR101489498B1 (ko) * 2013-09-30 2015-02-06 주식회사평화발레오 클러치 액츄에이터
KR101526789B1 (ko) * 2014-02-26 2015-06-12 주식회사평화발레오 클러치 액추에이터

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101489500B1 (ko) 2013-08-30 2015-02-05 주식회사평화발레오 유압식 클러치 액츄에이터

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970045986A (ko) * 1995-12-27 1997-07-26 김옥수 자동차의 풋클러치 자동제어장치
KR20070037193A (ko) * 2005-09-30 2007-04-04 현대자동차주식회사 전기모터식 클러치 액추에이터 구조
EP2336587B1 (fr) * 2009-12-21 2013-01-23 Valeo Embrayages Dispositif d'actionnement à came pour un système d'embrayage à friction
KR101489498B1 (ko) * 2013-09-30 2015-02-06 주식회사평화발레오 클러치 액츄에이터
KR101526789B1 (ko) * 2014-02-26 2015-06-12 주식회사평화발레오 클러치 액추에이터

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020126748A1 (fr) * 2018-12-19 2020-06-25 Valeo Embrayages Actionneur d'embrayage
FR3090771A1 (fr) * 2018-12-19 2020-06-26 Valeo Embrayages Actionneur d’embrayage
FR3090770A1 (fr) * 2018-12-19 2020-06-26 Valeo Embrayages Actionneur d’embrayage

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Publication number Publication date
KR102006078B1 (ko) 2019-07-31
KR20190063977A (ko) 2019-06-10

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