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WO2019210510A1 - Déphaseur d'arbre à cames - Google Patents

Déphaseur d'arbre à cames Download PDF

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Publication number
WO2019210510A1
WO2019210510A1 PCT/CN2018/085613 CN2018085613W WO2019210510A1 WO 2019210510 A1 WO2019210510 A1 WO 2019210510A1 CN 2018085613 W CN2018085613 W CN 2018085613W WO 2019210510 A1 WO2019210510 A1 WO 2019210510A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
stator
elastic member
mounting hole
camshaft phaser
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/CN2018/085613
Other languages
English (en)
Chinese (zh)
Inventor
全婷
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to CN201880088952.XA priority Critical patent/CN111699303B/zh
Priority to PCT/CN2018/085613 priority patent/WO2019210510A1/fr
Publication of WO2019210510A1 publication Critical patent/WO2019210510A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear

Definitions

  • the invention relates to a camshaft phaser.
  • variable valve timing system is an important component to ensure engine performance, which can adjust the opening and closing of the engine's valves as needed, so that the engine obtains the desired power output.
  • the variable valve timing system mainly includes a camshaft phaser and a camshaft connected to the camshaft phaser, and the camshaft is connected to the valve of the engine through a link mechanism.
  • the camshaft phaser is formed by a plurality of oil chambers inside the camshaft phaser by the end cover, the rotor and the stator (the stator and the end cover are relatively fixed), and hydraulic oil of different pressure can be input to the plurality of oil chambers to make
  • the rotor rotates relative to the stator and the end cover, thereby driving the camshaft through the rotor to adjust the opening and closing of the valve. Since the rotor is not required to rotate relative to the stator when the variable valve timing system is not required to function, a locking assembly is typically employed to lock the relative rotation of the stator and rotor.
  • the rotor 20 is formed with a mounting hole 20h extending along the axial direction A
  • the end cap 30 is formed with a lock extending along the axial direction A.
  • the hole 30h, the lock hole 30h and the mounting hole 20h are opposed to each other in the axial direction A.
  • the support member 101, the coil spring 102, and the lock pin 103 of the lock assembly 10 are mounted in the mounting hole 20h of the rotor 20, and the lock sleeve 104 of the lock assembly 10 is mounted in the lock hole 30h of the end cover 30.
  • the support member 101 is entirely located in the mounting hole 20h of the rotor 20, the coil spring 102 is fitted radially outward of the guide post of the support member 101, and one end (the right end in the figure) of the coil spring 102 abuts The lock pin 103 and the other end abut against the base of the support member 101, and the lock pin 103 is fitted to the coil spring 102.
  • the lock assembly 10 is in the locked state, one end (right end in the drawing) of the lock pin 103 extends into the lock sleeve 104 in the lock hole 30h of the end cover 30 along the axial direction A, so that The rotor 20 cannot rotate relative to the end cap 30, that is, the rotor 20 cannot rotate relative to the stator 40.
  • the stator 40 is formed with a mounting hole 40h extending in the radial direction R
  • the rotor 20 is formed with a lock extending in the radial direction R.
  • the hole 20h1, the lock hole 20h1 and the mounting hole 40h are opposed to each other in the radial direction R.
  • the support member 101, the coil spring 102, and the lock pin 103 of the lock assembly 10 are mounted in the mounting hole 40h of the stator 40.
  • one end (radially inner end) of the lock pin 103 projects into the lock hole 20h1 of the rotor 20 in the radial direction R, so that the rotor 20 cannot rotate relative to the stator 40.
  • the rotor 20 and the stator 40 need to be separately formed to form the locking hole 20h1 and the mounting hole 40h, the locking hole 20h1 and the mounting hole 40h.
  • the design of the portion for the components corresponding to the locking assembly 10 greatly increases the processing difficulty of the rotor 20 and the stator 40, increasing the cost.
  • the oil-only dedicated oil circuit is 20h2.
  • the oil passage 20h2 is too complicated due to the inclusion of the radial portion extending along the radial direction R and the axial portion extending along the axial direction A.
  • the present invention has been made based on the above-described drawbacks of the prior art. SUMMARY OF THE INVENTION It is an object of the present invention to provide a camshaft phaser such that the structure associated with the locking assembly of the camshaft phaser is simple and the locking clearance of the locking assembly does not require assembly adjustment.
  • the present invention adopts the following technical solutions.
  • the present invention provides a camshaft phaser including a rotor, a stator and a lock assembly, the rotor being rotatable relative to the stator, the lock assembly being mounted to the rotor Capable of locking relative rotation between the rotor and the stator, the locking assembly comprising: an elastic member mounted in a mounting hole of the rotor, the central axis of the elastic member substantially along The radial extension of the rotor enables the resilient member to compress and elongate in a radial direction of the rotor, and a radially inner end of the resilient member is pressed against the rotor; and a locking pin, the lock a locking pin is mounted in the mounting hole of the rotor, and a radially outer end of the elastic member is pressed against the locking pin, so that the locking pin can face the diameter under the elastic force of the elastic member Moving to the outside to engage with the stator for locking.
  • the mounting hole is a blind hole, and the bottom of the mounting hole is formed with at least one through hole, the at least one through hole making the mounting hole communicate with the outside of the rotor.
  • the at least one through hole extends in the axial direction of the rotor.
  • the rotor includes a cylindrical rotor body and a plurality of rotor blades projecting radially outward from the rotor body, the mounting holes being formed in one of the plurality of rotor blades, the mounting A bore extends in a radial direction of the rotor and the mounting bore opens in a radially outer side of the one rotor blade.
  • a wall surface of the one rotor blade for forming the mounting hole is formed with a step portion protruding toward a radially inner side of the mounting hole itself, and a radially inner end of the elastic member is pressed against the wall portion In the step portion, a part of the lock pin is inserted into the elastic member such that the elastic member is located between the lock pin and the wall surface.
  • the lock assembly further includes a support member mounted to the mounting hole, the support member including a base and a guide post protruding from the base, the diameter of the elastic member Pressing to the inner end of the connection point of the base connected to the guide post and the elastic member is sleeved radially outward of the guide post itself, the lock pin at least partially surrounding the elasticity
  • the member and the guide post are disposed on a radially outer side of the elastic member itself such that the elastic member is located between the guide post and the lock pin.
  • the stator includes a stator body and a plurality of stator blades projecting radially inward from the stator body, the stator body being opposite to the mounting hole in the locked state of the lock assembly
  • the portion is formed with a locking portion that is recessed toward the radially outer side, and the locking pin projects into the locking portion by the elastic force of the elastic member when the locking assembly is in the locked state.
  • a portion of the radially outer bottom portion of the locking portion is formed with an oil guiding groove recessed toward the radially outer side such that the locking pin and the oil guiding groove are in a locked state when the locking assembly is in a locked state Face each other.
  • the oil guiding groove extends along the axial direction over the entire axial dimension of the stator.
  • stator and/or the rotor are formed by powder metallurgy forming.
  • the present invention provides a novel camshaft phaser, the locking assembly of the camshaft phaser is mounted on the rotor in a radial direction and can be directly engaged with the stator to achieve locking, thereby
  • the structure of the camshaft phaser associated with the locking assembly is simple and the locking gap of the locking assembly does not require assembly adjustment.
  • FIG. 1a is a schematic axial cross-sectional view of a prior art camshaft phaser; and FIG. 1b is a schematic view showing the structure of the camshaft phaser of FIG. 1a as viewed from the axial side.
  • FIG. 2a is a schematic axial cross-sectional view of another camshaft phaser of the prior art
  • FIG. 2b is a schematic radial cross-sectional view of the camshaft phaser of FIG. 2a, showing the camshaft phaser of FIG. 2a Internal structure.
  • Figure 3a is a schematic axial cross-sectional view of a camshaft phaser in accordance with a first embodiment of the present invention
  • Figure 3b is a radial cross-sectional view of the camshaft phaser of Figure 3a, showing the cam of Figure 3a
  • 3c is a perspective view of a partial structure of a stator of the camshaft phaser of FIG. 3a
  • FIG. 3d is a schematic view of the rotor of the camshaft phaser of FIG. 3a, wherein the locking assembly is mounted The state of the rotor.
  • FIG. 4a is a schematic axial cross-sectional view of a camshaft phaser in accordance with a second embodiment of the present invention
  • FIG. 4b is a radial cross-sectional view of the camshaft phaser of FIG. 4a, showing the cam of FIG. 4a
  • the internal structure of the shaft phaser is a schematic axial cross-sectional view of a camshaft phaser in accordance with a second embodiment of the present invention.
  • FIG. 4b is a radial cross-sectional view of the camshaft phaser of FIG. 4a, showing the cam of FIG. 4a The internal structure of the shaft phaser.
  • the camshaft phaser according to the present invention has a substantially cylindrical shape as a whole, and the axial, radial and circumferential directions of the present invention refer to the axial, radial and circumferential directions of the camshaft phaser (stator and rotor), respectively, unless otherwise specified. to.
  • the camshaft phaser As shown in FIGS. 3a to 3b, the camshaft phaser according to the first embodiment of the present invention has a substantially cylindrical shape as a whole.
  • the camshaft phaser includes a lock assembly 1, a rotor 2, and a stator 3.
  • the rotor 2 is disposed radially inward of the stator 3 and is rotatable relative to the stator 3.
  • the stator 3 includes a cylindrical stator main body 32 and a plurality of stator blades 31 projecting radially inward from the stator main body 32.
  • the rotor 2 includes a cylindrical rotor main body 22 and a plurality of rotor blades 21 projecting radially outward from the rotor main body 22.
  • the plurality of stator blades 31 and the plurality of rotor blades 21 are alternately arranged in the circumferential direction C such that each of the rotor blades 21 is located between the adjacent two stator blades 31.
  • the space between the adjacent two stator blades 31 is divided into two mutually independent oil chambers by the rotor blades 21 located between the two stator blades 31.
  • the camshaft phaser shown in Figures 3a and 3b four groups of oil chambers distributed along the circumferential direction C are formed, each group of oil chambers comprising two oil chambers, respectively, which are formed in the rotor
  • An independent oil passage in the main body 22 is in communication with the oil supply device.
  • one of the four rotor blades 21 is formed with a mounting hole 21h1 for mounting the lock assembly 1, the mounting hole 21h1 of the one rotor blade 21
  • the radially outer side opening is open toward the radially outer side.
  • the mounting hole 21h1 is a blind hole
  • the bottom of the mounting hole 21h1 is formed with two through holes 21h2 extending in the axial direction A, the two through holes 21h2 making the mounting hole 21h1 communicate with the outside of the rotor 2, thereby making Air and hydraulic oil remaining in the mounting hole 21h1 can be discharged through the two through holes 21h2.
  • the lock assembly 1 is mounted in the mounting hole 21h1 of the one rotor blade 21 described above to be able to lock the relative rotation between the rotor 2 and the stator 3.
  • the lock assembly 1 includes a coil spring 12 and a lock pin 13.
  • the coil spring 12 as the elastic member preferably employs a cylindrical coil spring 12.
  • the coil spring 12 is mounted in the mounting hole 21h1 of the one rotor blade 21 described above such that the central axis of the coil spring 12 extends substantially in the radial direction R, so that the coil spring 12 can be compressed and elongated in the radial direction R.
  • the wall surface of the rotor blade 21 for forming the mounting hole 21h1 is formed with a step portion 21s which protrudes toward the radially inner side of the mounting hole 21h1 itself along the circumferential direction of the mounting hole 21h1, and the radial direction of the coil spring 12 The inner end is pressed against the step portion 21s.
  • the lock pin 13 is also mounted to the mounting hole 21h1 of the one rotor blade 21, and the radially outer end of the coil spring 12 is pressed against the lock pin step 131 of the lock pin 13, so that the lock pin 13 is at the coil spring 12.
  • the spring force can move in the radial direction R. More specifically, the coil spring 12 is fitted over the radially inner portion 132 of the lock pin 13 such that the coil spring 12 is located between the radially inner portion 132 of the lock pin 13 and the wall surface of the rotor blade 2 for forming the mounting hole 21h1 .
  • the portion of the stator main body 32 that faces the mounting hole 21h1 when the lock assembly 1 is in the locked state is formed with a locking portion 321 that is recessed toward the radially outer side.
  • the locking pin 13 projects into the locking portion 321 by the spring force of the coil spring 12 to engage with the stator 3 to achieve locking.
  • the lock gap 13h between the lock pin 13 and the wall surface of the stator main body 32 for forming the lock portion 321 can be ensured only by the dimensional tolerance of the rotor 2 and the stator 3 without assembly adjustment.
  • a portion of the radially outer bottom portion of the locking portion 321 is formed with an oil guiding groove 322 that is recessed toward the radially outer side so that the locking pin is locked when the locking assembly 1 is in the locked state. 13 is opposite to the oil guiding groove 322.
  • hydraulic oil can flow between the stator main body 32 and the lock pin 13 through the oil guide groove 322, so that the lock pin 13 can be moved toward the radially inner side against the spring force of the coil spring 12 to complete the unlocking.
  • the oil guiding groove 322 extends in the axial direction A over the entire axial dimension of the stator 3.
  • the basic structure of the camshaft phaser according to the second embodiment of the present invention is substantially the same as the basic structure of the camshaft phaser according to the first embodiment of the present invention, between the two The difference is that in the present embodiment, the lock assembly 1 further includes a support member 11 to which the coil spring 12 and the lock pin 13 are both mounted.
  • the support member 11 includes a base 111 that matches the bottom shape of the mounting hole 21h1 of the rotor 2, and a guide post 112 that protrudes from the base 111 toward the radially outer side.
  • the support member 11 is mounted in the mounting hole 21h1 of the rotor 2 and the coil spring 12 is fitted on the radially outer side of the guide post 112 itself.
  • the radially inner end of the coil spring 12 abuts on the joint portion of the base 111 connected to the guide post 112.
  • the lock pin 13 is fitted radially outward of the coil spring 12 itself and partially surrounds the coil spring 12 and the guide post 112 such that the coil spring 12 is located between the guide post 112 and the lock pin 13.
  • the operation principle of the lock assembly 1 is the same as that of the lock assembly of the camshaft phaser according to the first embodiment of the present invention, and will not be described herein.
  • the present embodiment can achieve the same effects as the first embodiment, and since the lock assembly 1 further includes the support member 11 in the present embodiment, the operation of the lock assembly is made more stable.
  • the radially outer side surface of the lock pin 13 may be formed with a recess 133 that is recessed toward the radially inner side, and the recess 133 is used for the oil guide groove 322 when the lock assembly 1 is in the locked state. Face each other. Thus, a sufficient space is formed between the recess 133 and the oil guiding groove 322 for the inflow of the hydraulic oil, thereby further ensuring that the locking pin 13 moves toward the radially inner side under the pressure of the hydraulic oil to realize the locking assembly 1 Unlocked.
  • the number of through holes 21h2 formed at the bottom of the mounting hole 21h1 of the rotor 2 is not limited to the number described in the above embodiment, and for example, only one through hole 21h2 may be formed.
  • annular groove is formed at a portion where the base 111 of the support member 11 is connected to the guide post 112 such that the radially inner end of the coil spring 12 abuts in the annular groove.
  • both the stator 3 and the rotor 2 are formed by powder metallurgy molding.
  • oil guiding groove 322 extends along the axial direction A over the entire axial dimension of the stator 3, the present invention is not limited thereto.
  • the oil guiding groove 322 may also extend over a portion of the axial dimension of the stator 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'invention concerne un déphaseur d'arbre à cames qui comprend un rotor (2), un stator (3) et un ensemble de verrouillage (1). Le rotor (2) peut tourner par rapport au stator (3). L'ensemble de verrouillage (1) est monté sur le rotor (2) de façon à verrouiller une rotation relative entre le rotor (2) et le stator (3). L'ensemble de verrouillage comprend : un élément élastique monté à l'intérieur d'un trou de montage (21h1) du rotor, l'axe central de l'élément élastique s'étendant sensiblement le long de la direction radiale du rotor (2) de telle sorte que l'élément élastique peut être comprimé et étendu le long de la direction radiale du rotor (2) et l'extrémité radialement interne de l'élément élastique s'appuie contre le rotor (2); et une broche de verrouillage (13) montée dans le trou de montage (21h1) du rotor (2), l'extrémité radialement externe de l'élément élastique s'appuyant contre la broche de verrouillage (13), de telle sorte que la broche de verrouillage (13) peut se déplacer vers le côté radialement externe sous l'action de la force élastique de l'élément élastique de façon à venir en prise avec le stator (3) pour effectuer le verrouillage. L'ensemble de verrouillage (1) du déphaseur d'arbre à cames est de structure simple, et le jeu de verrouillage de l'ensemble de verrouillage (1) n'a pas besoin d'être installé et ajusté.
PCT/CN2018/085613 2018-05-04 2018-05-04 Déphaseur d'arbre à cames Ceased WO2019210510A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880088952.XA CN111699303B (zh) 2018-05-04 2018-05-04 凸轮轴相位器
PCT/CN2018/085613 WO2019210510A1 (fr) 2018-05-04 2018-05-04 Déphaseur d'arbre à cames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/085613 WO2019210510A1 (fr) 2018-05-04 2018-05-04 Déphaseur d'arbre à cames

Publications (1)

Publication Number Publication Date
WO2019210510A1 true WO2019210510A1 (fr) 2019-11-07

Family

ID=68386220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/085613 Ceased WO2019210510A1 (fr) 2018-05-04 2018-05-04 Déphaseur d'arbre à cames

Country Status (2)

Country Link
CN (1) CN111699303B (fr)
WO (1) WO2019210510A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1621662A (zh) * 2003-11-27 2005-06-01 三菱电机株式会社 阀定时调整装置及其组装装置
US20060266318A1 (en) * 2005-05-24 2006-11-30 Hitachi, Ltd. Valve timing control apparatus and internal combustion engine
CN101137820A (zh) * 2005-03-09 2008-03-05 爱信精机株式会社 阀开闭时机控制装置
EP2824295A1 (fr) * 2012-03-08 2015-01-14 Nissan Motor Co., Ltd Dispositif de commande de synchronisation de soupape variable pour moteur à combustion interne
EP3032050A1 (fr) * 2013-08-08 2016-06-15 Aisin Seiki Kabushiki Kaisha Dispositif de commande du calage d'ouverture/fermeture de soupapes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311655B1 (en) * 2000-01-21 2001-11-06 Borgwarner Inc. Multi-position variable cam timing system having a vane-mounted locking-piston device
US6647936B2 (en) * 2002-04-22 2003-11-18 Borgwarner Inc. VCT lock pin having a tortuous path providing a hydraulic delay
JP2005155373A (ja) * 2003-11-21 2005-06-16 Mitsubishi Electric Corp バルブタイミング調整装置
JP2008057397A (ja) * 2006-08-30 2008-03-13 Aisin Seiki Co Ltd 弁開閉時期制御装置
JP2014034914A (ja) * 2012-08-08 2014-02-24 Aisin Seiki Co Ltd 弁開閉時期制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1621662A (zh) * 2003-11-27 2005-06-01 三菱电机株式会社 阀定时调整装置及其组装装置
CN101137820A (zh) * 2005-03-09 2008-03-05 爱信精机株式会社 阀开闭时机控制装置
US20060266318A1 (en) * 2005-05-24 2006-11-30 Hitachi, Ltd. Valve timing control apparatus and internal combustion engine
EP2824295A1 (fr) * 2012-03-08 2015-01-14 Nissan Motor Co., Ltd Dispositif de commande de synchronisation de soupape variable pour moteur à combustion interne
EP3032050A1 (fr) * 2013-08-08 2016-06-15 Aisin Seiki Kabushiki Kaisha Dispositif de commande du calage d'ouverture/fermeture de soupapes

Also Published As

Publication number Publication date
CN111699303A (zh) 2020-09-22
CN111699303B (zh) 2022-09-09

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