WO2020061739A1 - 凸轮轴相位器用插入件及凸轮轴相位器 - Google Patents

凸轮轴相位器用插入件及凸轮轴相位器 Download PDF

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Publication number
WO2020061739A1
WO2020061739A1 PCT/CN2018/107304 CN2018107304W WO2020061739A1 WO 2020061739 A1 WO2020061739 A1 WO 2020061739A1 CN 2018107304 W CN2018107304 W CN 2018107304W WO 2020061739 A1 WO2020061739 A1 WO 2020061739A1
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WO
WIPO (PCT)
Prior art keywords
camshaft phaser
cylindrical portion
rotor
insert
cylindrical
Prior art date
Application number
PCT/CN2018/107304
Other languages
English (en)
French (fr)
Inventor
刘晓娜
Original Assignee
舍弗勒技术股份两合公司
刘晓娜
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 舍弗勒技术股份两合公司, 刘晓娜 filed Critical 舍弗勒技术股份两合公司
Priority to DE112018008008.0T priority Critical patent/DE112018008008T5/de
Priority to CN201880095471.1A priority patent/CN112513431B/zh
Priority to US17/275,829 priority patent/US11542843B2/en
Priority to PCT/CN2018/107304 priority patent/WO2020061739A1/zh
Publication of WO2020061739A1 publication Critical patent/WO2020061739A1/zh

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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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control valves
    • 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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34469—Lock movement parallel to camshaft axis
    • 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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34483—Phaser return springs
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/02—Camshaft drives characterised by their transmission means the camshaft being driven by chains

Definitions

  • the present invention relates to an insert for a camshaft phaser and a camshaft phaser.
  • variable valve timing system is an important part to ensure the performance of the engine. It can adjust the opening and closing of the valve of the engine as required, so that the engine can obtain the desired power output and other performance.
  • the variable valve timing system includes Camshaft phaser together.
  • a camshaft phaser includes a stator (not shown), a rotor 10, an end cover 20, a spring cover 30, a coil spring 40, a fixing pin 50, and an outer cover 60.
  • the stator includes a cylindrical stator body and a plurality of stator protrusions protruding radially inward from the stator body.
  • the rotor 10 is disposed radially inward of the stator and is rotatable relative to the stator.
  • the rotor 10 includes a cylindrical rotor body 101 and a plurality of rotor blades 102 protruding radially outward from the rotor body 101.
  • the plurality of rotor blades 102 and the plurality of stator protrusions are alternately arranged in the circumferential direction, so that each rotor blade 102 is located between two adjacent stator protrusions. In this way, the space between two adjacent stator protrusions is divided into two independent oil chambers by the rotor blades 102 located between the two stator protrusions.
  • the rotor body 101 is also formed with a central hole 101h for mounting a central valve and a camshaft.
  • the central hole 101h penetrates the rotor body 101 along the axial direction A.
  • the central hole 101h has a first hole wall portion. Step structures 101h1, second hole wall portion 101h2, third hole wall portion 101h3, and fourth hole wall portion 101h4. As shown in FIG. 1b and FIG.
  • the first hole wall portion 101h1 and the second hole wall portion 101h2 of the center hole 101h having the same inner diameter are formed by turning a green body, and the center hole 101h is relatively
  • the third and second hole wall portions 101h1 and 101h2 protruding toward the radially inner side and the fourth and second hole wall portions 101h1 and 101h2 recessed toward the radially outer side.
  • the part 101h4 is processed by hard turning.
  • the end cover 20 and the spring cover 30 are fixed to the stator from both sides in the axial direction by fixing members, so that the end cover 20 and the spring cover 30 surround the stator and the rotor 10 to form the above-mentioned oil cavity.
  • the coil spring 40 is fixed to the end cover 20 and one end of the coil spring 40 is fixed to the end cover 20.
  • the other end of the coil spring 40 is fixed to a fixing pin 50 mounted on the rotor body 101.
  • the outer cover 60 is sleeved on the stator from one axial side and is used to cooperate with the central valve.
  • the fixing pin 50 is mounted (fixed) to the rotor body 101 so that the other end of the coil spring 40 is fixed to the fixing pin 50, but the fixing pin 50 projects farther toward the axial side than the rotor body 101 and has a head Therefore, the fixing pin 50 requires a large space for installation, and may also cause the fixing pin 50 to interfere with other components; and
  • An object of the present invention is to provide an insert for a camshaft phaser, which can make the center hole of the rotor not need to undergo the above two processes to form a stepped structure, and the insert can replace the prior art camshaft phaser Fixing pin, which simplifies the structure of the rotor and reduces costs.
  • the present invention adopts the following technical solutions.
  • the invention provides an insert for a camshaft phaser, the insert for a camshaft phaser is partially inserted and installed in a center hole of a rotor of the camshaft phaser, and the insert for the camshaft phaser is integral It has a stepped cylindrical shape and includes a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion that are connected to each other and are coaxially arranged, the first cylindrical portion extends in the axial direction, and the second cylindrical portion is located in the The first cylindrical portion extends axially on one side and in the axial direction, the third cylindrical portion extends axially on one side of the second cylindrical portion, and the third cylindrical portion is formed with The engaging portion of the coil spring of the camshaft phaser is fixed, and an outer diameter of the first cylindrical portion is smaller than an outer diameter of the second cylindrical portion, and an outer diameter of the second cylindrical portion is smaller than the third cylindrical portion.
  • the outer diameter of the tube is fixed, and an outer diameter of the first cylindrical portion is smaller than an outer diameter of the second cylindrical
  • the camshaft phaser insert further includes a first connection portion and a second connection portion, and the first connection portion extends radially outward from an end edge on an axial side of the first cylindrical portion, The radially outer end edge of the first connecting portion is connected to the second cylindrical portion, and the second connecting portion extends from the axial side end edge of the second cylindrical portion toward the radially outer side, so A radially outer end edge of the second connecting portion is connected to the third cylindrical portion.
  • each cylinder portion and the connection portion of the camshaft phaser insert are integrally formed.
  • the third cylindrical portion extends on a part of the circumference along the circumferential direction, and the engaging portion is formed at a circumferential end portion of the third cylindrical portion.
  • the length of the third cylindrical portion extending in the circumferential direction is half or more.
  • the engaging portion includes a notch formed at a circumferential end portion of the third cylindrical portion and a hook portion folded back from a bottom edge forming the notch toward a radially inner side.
  • the second cylindrical portion is formed with a plurality of through holes that penetrate the second cylindrical portion in the radial direction and are distributed in the circumferential direction.
  • the present invention also provides a camshaft phaser comprising: a stator and a rotor located radially inward of the stator and capable of rotating relative to the stator, the rotor being formed in an axial direction Through the center hole of the rotor; and the camshaft phaser insert according to any one of the above technical schemes, the camshaft phaser insert is fixed to the rotor, and the camshaft phaser insert The first cylindrical portion, the first connecting portion, and the second cylindrical portion are inserted into the center hole, and the second connecting portion abuts an end surface on an axial side of the rotor.
  • an outer diameter of the second cylindrical portion is larger than a diameter of the central hole, so that the second cylindrical portion is installed in the central hole in an interference fit manner with the rotor.
  • the inside of the camshaft phaser insert is used for inserting and installing a central valve
  • the central valve has a cylindrical shape as a whole and includes a central valve barrel portion extending in the axial direction and a central valve barrel portion extending from the central valve barrel portion.
  • a flange portion extending toward the radially outer side, the central valve barrel portion is inserted into the first barrel portion and is fitted with the first barrel portion, and the flange portion abuts against the second connecting portion Axial side surface.
  • the camshaft phaser further includes a spring cover and a coil spring
  • the spring cover is fixed to the stator from one side in the axial direction
  • the third cylindrical portion is located radially inward of the spring cover
  • the coil spring is mounted on an axial end face of the spring cover, and the coil spring is supported from the radially inner side by the third cylindrical portion, and one end of the coil spring is fixed to the spring cover and the coil The other end of the spring is fixed to the engaging portion of the camshaft phaser insert.
  • a plurality of groups of oil chambers distributed along the circumferential direction are formed between the rotor and the stator, and each group of oil chambers includes a first oil chamber and a second oil chamber adjacent to each other, and the interior of the rotor is formed There are a first oil passage communicating with the first oil cavity and a second oil passage communicating with the second oil cavity, respectively.
  • Each of the first oil passages has a first opening at a center hole of the rotor.
  • the second openings of the second oil passages at the center hole of the rotor do not overlap in the axial direction, and the through holes formed in the second cylindrical portion are opposed to the second openings, respectively.
  • the first cylindrical portion is located between the first opening and the second opening in the axial direction.
  • the present invention provides an insert for a camshaft phaser and a camshaft phaser including the same.
  • the camshaft phaser insert is installed in the center hole of the rotor and has a stepped cylindrical shape as a whole.
  • the central valve and the camshaft can be installed in the insert, so that the center hole of the rotor does not need to be formed into a stepped structure through two processes;
  • the camshaft phaser insert is provided with a locking portion for fixing the coil spring, so that the insert can replace the fixing pin of the camshaft phaser of the prior art.
  • the camshaft phaser according to the present invention has a simpler structure and lower cost than the prior art camshaft phaser.
  • Fig. 1a is a schematic perspective view of a camshaft phaser of the prior art
  • Fig. 1b is a perspective view of a camshaft phaser of Fig. 1a
  • Fig. 2a is a schematic perspective view of a three-dimensional structure of an insert for a camshaft phaser according to the present invention
  • Fig. 2b is a schematic cross-sectional view of a camshaft phaser including the insert of Fig. 2a; Schematic diagram of the three-dimensional structure.
  • the axial, radial, and circumferential directions of the present invention refer to the axial, radial, and circumferential directions of a camshaft phaser (an insert for a camshaft phaser, respectively).
  • the "axial side” refers to the right side in Fig. 2b, and the “axial other side” refers to the left side in Fig. 2b.
  • An insert for a camshaft phaser according to the present invention is used to partially insert into a center hole of a rotor of a camshaft phaser and is mounted to the rotor.
  • the outer peripheral wall of the camshaft phaser insert 1 is repeatedly bent so that the insert 1 has a stepped cylindrical shape as a whole, and the insert 1 includes a first cylindrical portion 11 connected in sequence.
  • the first tube portion 11 extends continuously over the entire circumference in the circumferential direction and a predetermined length in the axial direction A.
  • the first connecting portion 12 extends from the axially-side end edge of the first cylindrical portion 11 toward the radially outer side along the radial direction R, so that the radially inner end edge of the first connecting portion 12 and the first cylindrical portion 11 The end edges on one axial side are connected.
  • the second cylindrical portion 13 is connected to the radially outer end edge of the first connecting portion 12 and extends along the axial direction A by a predetermined length toward one axial side, so that the other axial end edge of the second cylindrical portion 13 and The radially outer end edges of the first connection portion 12 are connected.
  • the outer diameter of the second cylindrical portion 13 is larger than the outer diameter of the first cylindrical portion 11.
  • the second cylindrical portion 13 also extends continuously over the entire circumference in the circumferential direction.
  • the second cylindrical portion 13 is formed with a plurality of through holes 13 h that penetrate the second cylindrical portion 13 in the radial direction R and are distributed in the circumferential direction.
  • the plurality of through holes 13h are used to correspond to openings of the oil passage formed in the rotor 2 of the camshaft phaser at the center hole 2h, which will be further explained in the following.
  • the second connecting portion 14 extends from the axially-side end edge of the second cylindrical portion 13 in the radial direction R toward the radially outer side, so that the radially inner end edge of the second connecting portion 14 and the second cylindrical portion 13 The end edges on one axial side are connected.
  • the third cylindrical portion 15 is connected to the radially outer end edge of the second connecting portion 14 and extends along the axial direction A by a predetermined length toward one axial side, so that the other axial end edge of the third cylindrical portion 15 and A radially outer end edge of the second connection portion 14 is connected.
  • the outer diameter of the third cylindrical portion 15 is larger than the outer diameter of the second cylindrical portion 13.
  • the third cylindrical portion 15 extends along a part of the circumference in the circumferential direction, and the length of the third cylindrical portion 15 in the circumferential direction is a half circle (that is, the center corresponding to the circumferential length of the third cylindrical portion 15). The angle is equal to 180 degrees). In this way, the third tube portion 15 has a length sufficient to support the coil spring 5 from the radially inner side without interfering with other components.
  • the third tube portion 15 is formed with a catching portion for fixing an end portion of the coil spring 5 of the camshaft phaser.
  • the engaging portion is formed at a circumferential end portion of the third cylindrical portion 15.
  • the engaging portion includes a notch 151 formed at the circumferential end of the third cylindrical portion 15 and a hook portion 152 folded back radially inward from a bottom edge forming the notch 151. .
  • each of the barrel portions 11, 13, and 15 and the connecting portions 12, 14 of the camshaft phaser insert may be integrally formed by a single molding process.
  • camshaft phaser insert 1 The structure of the camshaft phaser insert 1 according to the present invention has been described above. The structure of the camshaft phaser including the insert 1 will be described in detail below with reference to the accompanying drawings.
  • the camshaft phaser includes a stator (not shown), a camshaft phaser insert 1, a rotor 2, an end cover 3, a spring cover 4, and a coil spring 5.
  • the stator includes a cylindrical stator body and a plurality of stator protrusions protruding radially inward from the stator body.
  • the rotor 2 is provided on the radially inner side of the stator and is rotatable relative to the stator.
  • the rotor 2 includes a cylindrical rotor main body and a plurality of rotor blades protruding from the rotor main body toward the radially outer side.
  • the plurality of rotor blades and the plurality of stator protrusions are alternately arranged in the circumferential direction so that each rotor blade is located between two adjacent stator protrusions.
  • a plurality of groups of oil chambers are formed in the circumferential direction, and each group of oil chambers includes two adjacent two stator protrusions and two independent ones separated by the rotor blades located between the two stator protrusions. Oil chamber (first oil chamber and second oil chamber).
  • the rotor body is formed with a central hole 2h penetrating the rotor body in the axial direction A.
  • the central axis of the central hole 2h coincides with the central axis of the rotor body and the diameter of the central hole 2h is equal over the entire axial length.
  • a first oil passage communicating with the first oil chamber and a second oil passage communicating with the second oil chamber are formed inside the rotor body.
  • the first opening of each first oil passage at the center hole 2h of the rotor body does not overlap in the axial direction A with the second opening of each second oil passage at the center hole 2h of the rotor 2.
  • the first opening is located at the first The other axial side of the two openings.
  • the first cylindrical portion 11, the first connecting portion 12, and the second cylindrical portion 13 of the camshaft phaser insert 1 according to the present invention are inserted into the center hole 2 h and the second connecting portion 14 abuts on the axial side of the rotor 2.
  • the outer diameter of the second cylinder portion 13 of the camshaft phaser insert 1 is larger than the diameter of the center hole 2h of the rotor body, so that the second cylinder portion 13 is installed in the center of the rotor body in an interference fit with the rotor body.
  • the camshaft phaser insert 1 is fixed to the rotor 2.
  • the first opening and the second opening formed at the center hole 2h of the rotor main body are located in the axial direction of the first cylinder portion 11, respectively.
  • Side, that is, the first cylinder portion 11 is located between the first opening and the second opening in the axial direction A, so that the first opening and the second opening can be matched with the central valve 6 by the first cylinder portion 11 and the first connecting portion 12 Divided.
  • the center valve 6 is inserted and installed inside the camshaft phaser insert 1.
  • the central valve 6 has a cylindrical shape as a whole and includes a central valve barrel portion 61 extending in the axial direction and a flange portion 62 extending from the central valve barrel portion 61 toward the radially outer side.
  • the central valve cylinder portion 61 is inserted into the first cylinder portion 11 and the flange portion 62 abuts on the surface on the axial side of the second connection portion 14.
  • the outer diameter of the central valve barrel portion 61 is smaller than the inner diameter of the first barrel portion 11 of the insert 1, so that a clearance fit is formed between the central valve barrel portion 61 and the insert 1.
  • the outer peripheral wall of the central valve cylinder portion 61 is formed with two sets of central valve through holes (the central valve first through hole 61h1 and the central valve second through hole 61h2) penetrating the central valve cylinder portion 61 in the radial direction R.
  • the valve through holes are spaced from each other in the axial direction A.
  • the central valve first through hole 61h1 corresponds to the first opening formed at the central hole 2h of the rotor body
  • the central valve second through hole 61h2 corresponds to the second opening formed at the central hole 2h of the rotor body.
  • central valve cylinder portion 61 is fixed to the camshaft by being screwed, for example.
  • the spring cover 4 is fixed to the stator from one side in the axial direction, and the end cover 3 is fixed to the stator from the other side in the axial direction.
  • the third cylindrical portion 15 of the camshaft phaser insert 1 is located radially inward of the spring cover 4.
  • the coil spring 5 is mounted on the axial end surface of the spring cover 4 and the coil spring 5 is supported from the radially inner side by the third cylinder portion 15 (as shown in FIG. 2c).
  • One end of the coil spring 5 is fixed to the spring cover 4.
  • the other end of the protruding and coil spring 5 is fixed to the notch 151 of the engaging portion of the camshaft phaser insert 1. In this way, compared with the conventional camshaft phaser, the fixing pin fixed to the rotor 2 is omitted, and the coil spring 5 can be prevented from falling off from the spring cover 4 as well.
  • the length of the third cylindrical portion 15 extending in the circumferential direction is a half circle
  • the present invention is not limited thereto.
  • the length of the third cylindrical portion 15 extending in the circumferential direction may be greater than half the circumference, that is, the center angle corresponding to the circumferential length of the third cylindrical portion 15 may be greater than 180 degrees.
  • first connecting portion 12 and the second connecting portion 13 both extend in the radial direction R
  • present invention is not limited thereto.
  • the first connection portion 12 and the second connection portion 13 may extend obliquely with respect to the radial direction R.
  • camshaft phaser according to the present invention may also have the same outer cover as the outer cover 60 of the camshaft phaser of the prior art.
  • camshaft phaser insert and the camshaft phaser according to the present invention can also have the following advantages.
  • the camshaft phaser insert 1 is an integral part and is preferably formed by one-time processing. Therefore, the coaxial tolerance of each cylinder portion of the insert 1 is very small, which facilitates the assembly of the central valve 6.
  • camshaft phaser insert 1 is used instead of the fixing pin 50 of the prior art camshaft phaser in FIG. 1a, space is saved and costs are reduced, and the rotor does not need to be formed for mounting and fixing.
  • the fixing pin mounting hole of the pin 50 reduces the cost.
  • the rotor 2 can have a smaller axial width, so the axial width of the entire camshaft phaser can be reduced, and the weight is correspondingly reduced.

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

Abstract

一种凸轮轴相位器用插入件及凸轮轴相位器。该插入件（1）用于部分地插入并安装于凸轮轴相位器的转子的中心孔，该插入件（1）整体具有阶梯筒状并且包括彼此相连且同轴地配置的第一筒部（11）、第二筒部（13）和第三筒部（15）。第一筒部（11）沿着轴向延伸，第二筒部（13）位于第一筒部（11）的轴向一侧且沿着轴向延伸，第三筒部（15）位于第二筒部（13）的轴向一侧且沿着轴向延伸，第三筒部（15）形成有用于固定凸轮轴相位器的卷簧（5）的卡接部。第一筒部（11）的外径小于第二筒部（13）的外径，第二筒部（13）的外径小于第三筒部（15）的外径。这样，中央阀和凸轮轴能够安装于该插入件（1），使得转子的中心孔不必形成台阶结构；该插入件能够代替现有技术的凸轮轴相位器的固定销，使得本发明的凸轮轴相位器的结构更加简单且成本更低。

Description

凸轮轴相位器用插入件及凸轮轴相位器 技术领域
本发明涉及凸轮轴相位器用插入件及凸轮轴相位器。
背景技术
可变气门正时系统是保证发动机性能的重要组成部分，其能够根据需要调节发动机的气门的开闭，从而使得发动机获得期望的动力输出等性能，可变气门正时系统包括与凸轮轴组装在一起的凸轮轴相位器。
如图1a所示，根据现有技术的凸轮轴相位器包括定子(未示出)、转子10、端盖20、弹簧盖30、卷簧40、固定销50和外盖60。
具体地，定子包括圆筒状的定子主体以及从定子主体朝向径向内侧突出的多个定子凸起。
如图1b所示，转子10设置于定子的径向内侧并且能够相对于定子转动。转子10包括圆筒状的转子主体101以及从转子主体101朝向径向外侧突出的多个转子叶片102。多个转子叶片102与多个定子凸起在周向上交替地布置，使得每个转子叶片102均位于相邻的两个定子凸起之间。这样，在相邻的两个定子凸起之间的空间被位于这两个定子凸起之间的转子叶片102分隔成两个彼此独立的油腔。
转子主体101还形成有用于安装中央阀和凸轮轴的中心孔101h，该中心孔101h沿着轴向A贯通转子主体101，并且如图1c所示，该中心孔101h具有由第一孔壁部101h1、第二孔壁部101h2、第三孔壁部101h3和第四孔壁部101h4形成的台阶结构。如图1b和图1c所示，该中心孔101h的具有相同内径的第一孔壁部101h1和第二孔壁部101h2通过生坯车旋加工而成，而该中心孔101h的相对于第一孔壁部101h1和第二孔壁部101h2朝向径向内侧凸出的第三孔壁 部101h3和相对于第一孔壁部101h1和第二孔壁部101h2朝向径向外侧凹陷的第四孔壁部101h4通过硬车加工而成。
端盖20和弹簧盖30通过固定件从轴向两侧固定于定子，使得端盖20和弹簧盖30与定子和转子10一起包围形成上述油腔。卷簧40固定于端盖20并且卷簧40的一端固定于该端盖20，卷簧40的另一端则固定于安装在转子主体101的固定销50。外盖60从轴向一侧套装于定子并且用于与中央阀配合。
经过发明人研究发现，具有上述结构的凸轮轴相位器具有下述问题：
1.由于转子10的转子主体101的中心孔101h的台阶结构需要生坯车旋和硬车两种加工来形成，使得转子10的成本高，而且由于该中心孔101h用于直接组装中央阀和凸轮轴，因此转子10的轴向宽度大；
2.固定销50安装(固定)于转子主体101，使得卷簧40的另一端固定于该固定销50，但是该固定销50比转子主体101朝向轴向一侧突出得多并且带有头部，因此该固定销50需要较大的空间来安装，而且还可能导致固定销50与其它部件发生干涉；以及
3.使用该固定销50来固定弹簧，导致了转子10的结构复杂且成本较高。
发明内容
基于上述现有技术的缺陷而做出了本发明。本发明的一个发明目的在于提供一种凸轮轴相位器用插入件，该插入件能够使得转子的中心孔不必经由上述两种加工来形成台阶结构并且该插入件能够代替现有技术的凸轮轴相位器的固定销，从而简化转子的结构并降低成本。
本发明的另一个发明目的在于提供一种包括上述凸轮轴相位器用插入件的凸轮轴相位器。
为了实现上述发明目的，本发明采用如下的技术方案。
本发明提供了一种如下的凸轮轴相位器用插入件，所述凸轮轴相位器用 插入件用于部分地插入并安装于凸轮轴相位器的转子的中心孔，所述凸轮轴相位器用插入件整体具有阶梯筒状并且包括彼此相连且同轴地配置的第一筒部、第二筒部和第三筒部，所述第一筒部沿着轴向延伸，所述第二筒部位于所述第一筒部的轴向一侧且沿着轴向延伸，所述第三筒部位于所述第二筒部的轴向一侧且沿着轴向延伸，所述第三筒部形成有用于固定所述凸轮轴相位器的卷簧的卡接部，并且所述第一筒部的外径小于所述第二筒部的外径，所述第二筒部的外径小于所述第三筒部的外径。
优选地，所述凸轮轴相位器用插入件还包括第一连接部和第二连接部，所述第一连接部从所述第一筒部的轴向一侧的端缘朝向径向外侧延伸，所述第一连接部的径向外侧的端缘与所述第二筒部相连，所述第二连接部从所述第二筒部的轴向一侧的端缘朝向径向外侧延伸，所述第二连接部的径向外侧的端缘与所述第三筒部相连。
优选地，所述凸轮轴相位器用插入件的各筒部和连接部一体地形成。
优选地，所述第三筒部沿着周向在部分圆周上延伸，所述卡接部形成于所述第三筒部的周向端部。
优选地，所述第三筒部沿着周向延伸的长度为半周或大于半周。
更优选地，所述卡接部包括在所述第三筒部的周向端部形成的缺口以及从形成该缺口的底边朝向径向内侧折回的钩部。
优选地，所述第二筒部形成有沿着径向贯通所述第二筒部且在周向上分布的多个通孔。
本发明还提供了一种如下的凸轮轴相位器，所述凸轮轴相位器包括：定子和位于定子的径向内侧且能够相对于所述定子转动的转子，所述转子形成有在轴向上贯通所述转子的中心孔；以及以上技术方案中任意一项技术方案所述的凸轮轴相位器用插入件，所述凸轮轴相位器用插入件固定于所述转子，所述凸轮轴相位器用插入件的所述第一筒部、所述第一连接部和所述第二筒 部插入所述中心孔内且所述第二连接部抵接于所述转子的轴向一侧的端面。
优选地，所述第二筒部的外径大于所述中心孔的直径，使得所述第二筒部以与所述转子过盈配合的方式安装于所述中心孔内。
优选地，所述凸轮轴相位器用插入件的内部用于供中央阀插入安装，所述中央阀整体具有圆筒形状并且包括沿着轴向延伸的中央阀筒部和从所述中央阀筒部朝向径向外侧延伸的凸缘部，所述中央阀筒部插入所述第一筒部并且与所述第一筒部间隙配合，并且所述凸缘部抵接于所述第二连接部的轴向一侧的表面。
优选地，所述凸轮轴相位器还包括弹簧盖和卷簧，所述弹簧盖从轴向一侧固定于所述定子且所述第三筒部位于所述弹簧盖的径向内侧，并且所述卷簧安装于所述弹簧盖的轴向一侧的端面且所述卷簧由所述第三筒部从径向内侧支撑，所述卷簧的一端固定于所述弹簧盖且所述卷簧的另一端固定于所述凸轮轴相位器用插入件的卡接部。
优选地，所述转子和所述定子之间形成沿着周向分布的多组油腔，各组油腔均包括彼此相邻的第一油腔和第二油腔，所述转子的内部形成有分别与所述第一油腔连通的第一油路和分别与所述第二油腔连通的第二油路，各所述第一油路在所述转子的中心孔处的第一开口与各所述第二油路在所述转子的中心孔处的第二开口在轴向上不重叠，并且形成于所述第二筒部的通孔分别与所述第二开口相对。优选地所述第一筒部在轴向上位于所述第一开口和所述第二开口之间。
通过采用上述技术方案，本发明提供了一种凸轮轴相位器用插入件及包括该凸轮轴相位器用插入件的凸轮轴相位器。一方面，该凸轮轴相位器用插入件安装于转子的中心孔并且整体具有阶梯筒状，中央阀和凸轮轴能够安装于该插入件，使得转子的中心孔不必通过两种加工形成台阶结构；另一方面，该凸轮轴相位器用插入件设置有固定卷簧的卡接部，使得该插入件能够代替 现有技术的凸轮轴相位器的固定销。这样，根据本发明的凸轮轴相位器相比现有技术的凸轮轴相位器的结构更加简单且成本更低。
附图说明
图1a是现有技术的凸轮轴相位器的立体结构示意图；图1b是图1a中的凸轮轴相位器的转子的立体结构示意图；图1c是图1b中的转子的沿着轴向截取的局部结构的剖视示意图。
图2a是根据本发明的凸轮轴相位器用插入件的立体结构示意图；图2b是包括图2a中的插入件的凸轮轴相位器的剖视示意图；图2c是图2b中的凸轮轴相位器的立体结构示意图。
附图标记说明
10转子 101转子主体 101h中心孔 101h1第一孔壁部 101h2第二孔壁部 101h3第三孔壁部 101h4第四孔壁部 102转子叶片 20端盖 30弹簧盖 40卷簧 50固定销 60外盖
1凸轮轴相位器用插入件(插入件)11第一筒部 12第一连接部13第二筒部 13h通孔 14第二连接部 15第三筒部 151缺口 152钩部 2转子 2h中心孔 3端盖 4弹簧盖 5卷簧 6中央阀 61中央阀筒部 62凸缘部 61h1中央阀第一通孔 61h2中央阀第二通孔
A轴向 R径向
具体实施方式
以下将结合说明书附图对本发明的具体实施方式进行说明。在本发明中，如无特殊说明，本发明的轴向、径向和周向分别是指凸轮轴相位器(凸轮轴相位器用插入件)的轴向、径向和周向。“轴向一侧”是指图2b中的右侧，“轴向另一侧”是指图2b中的左侧。
以下将结合说明书附图详细说明根据本发明的凸轮轴相位器用插入件的结构。
(根据本发明的凸轮轴相位器用插入件的结构)
根据本发明的凸轮轴相位器用插入件用于部分地插入凸轮轴相位器的转子的中心孔并安装于该转子。
如图2a和图2b所示，该凸轮轴相位器用插入件1的外周壁进行多次弯折使得该插入件1整体形成阶梯筒状，该插入件1包括顺次相连的第一筒部11、第一连接部12、第二筒部13、第二连接部14和第三筒部15，其中第一筒部11、第二筒部13和第三筒部15同轴地配置。
具体地，第一筒部11沿着周向在整周上连续地延伸且沿着轴向A延伸预定长度。
第一连接部12从第一筒部11的轴向一侧的端缘沿着径向R朝向径向外侧延伸，使得第一连接部12的径向内侧的端缘与第一筒部11的轴向一侧的端缘相连。
第二筒部13与第一连接部12的径向外侧的端缘相连且朝向轴向一侧沿着轴向A延伸预定长度，使得第二筒部13的轴向另一侧的端缘与第一连接部12的径向外侧的端缘相连。这样，第二筒部13的外径大于第一筒部11的外径。该第二筒部13也沿着周向在整周上连续地延伸。
另外，在本实施方式中，第二筒部13形成有沿着径向R贯通第二筒部13且在周向上分布的多个通孔13h。该多个通孔13h用于与在凸轮轴相位器的转子2内形成的油路在中心孔2h处的开口对应，这将在如下的内容中进一步说明。
第二连接部14从第二筒部13的轴向一侧的端缘沿着径向R朝向径向外侧延伸，使得第二连接部14的径向内侧的端缘与第二筒部13的轴向一侧的端缘相连。
第三筒部15与第二连接部14的径向外侧的端缘连接且朝向轴向一侧沿着轴向A延伸预定长度，使得第三筒部15的轴向另一侧的端缘与第二连接部14的径向外侧的端缘相连。这样，第三筒部15的外径大于第二筒部13的外径。
在本实施方式中，第三筒部15沿着周向在部分圆周上延伸，第三筒部15沿着周向延伸的长度为半周(即该第三筒部15的周向长度对应的中心角等于180度)。这样，第三筒部15具有足以从径向内侧支撑卷簧5的长度且不会与其它部件发生干涉。
进一步地，第三筒部15还形成有用于固定凸轮轴相位器的卷簧5的端部的卡接部。该卡接部形成于第三筒部15的周向端部，卡接部包括在第三筒部15的周向端部形成的缺口151以及从形成该缺口151的底边朝向径向内侧折回的钩部152。
优选地，凸轮轴相位器用插入件的各筒部11、13、15和连接部12、14可以通过一次成型加工而一体地形成。
以上说明了根据本发明的凸轮轴相位器用插入件1的结构，以下将结合说明书附图详细说明包括该插入件1的凸轮轴相位器的结构。
(根据本发明的凸轮轴相位器的结构)
如图2b和图2c所示，根据本发明的凸轮轴相位器包括定子(未示出)、凸轮轴相位器用插入件1、转子2、端盖3、弹簧盖4和卷簧5。
具体地，定子包括圆筒状的定子主体以及从定子主体朝向径向内侧突出的多个定子凸起。
转子2设置于定子的径向内侧并且能够相对于定子转动。转子2包括圆筒状的转子主体以及从转子主体朝向径向外侧突出的多个转子叶片。多个转子叶片与多个定子凸起在周向上交替地布置，使得每个转子叶片均位于相邻的两个定子凸起之间。这样，在周向上形成了多组油腔，各组油腔包括在相邻的两个定子凸起之间且被位于这两个定子凸起之间的转子叶片分隔开的两 个彼此独立的油腔(第一油腔和第二油腔)。
转子主体形成有在轴向A上贯通转子主体的中心孔2h，该中心孔2h的中心轴线与转子主体的中心轴线一致并且该中心孔2h的直径在整个轴向长度上相等。转子主体的内部形成有分别与第一油腔连通的第一油路和分别与第二油腔连通的第二油路。各第一油路在转子主体的中心孔2h处的第一开口在轴向A上与各第二油路在转子2的中心孔2h处的第二开口不重叠，具体地第一开口位于第二开口的轴向另一侧。当凸轮轴相位器用插入件1插入安装于上述中心孔2h的情况下，第二开口与上述的形成于第二筒部13的通孔13h分别相对。
根据本发明的凸轮轴相位器用插入件1的第一筒部11、第一连接部12和第二筒部13插入中心孔2h内且第二连接部14抵接于转子2的轴向一侧的端面。进一步地，凸轮轴相位器用插入件1的第二筒部13的外径大于转子主体的中心孔2h的直径，这样第二筒部13以与转子主体过盈配合的方式安装于转子主体的中心孔2h内，从而使得凸轮轴相位器用插入件1固定于转子2。
当凸轮轴相位器用插入件1插入安装于上述转子主体的中心孔2h的情况下，形成于转子主体的中心孔2h处的第一开口和第二开口分别位于第一筒部11的轴向两侧，即第一筒部11在轴向A上位于第一开口和第二开口之间，使得通过第一筒部11和第一连接部12配合中央阀6能够将第一开口和第二开口分隔开。
如图2b所示，中央阀6插入安装于凸轮轴相位器用插入件1的内部。中央阀6整体具有圆筒形状并且包括沿着轴向延伸的中央阀筒部61和从中央阀筒部61朝向径向外侧延伸的凸缘部62。中央阀筒部61插入第一筒部11并且凸缘部62抵接于第二连接部14的轴向一侧的表面。中央阀筒部61的外径小于该插入件1的第一筒部11的内径，使得中央阀筒部61与插入件1之间形成间隙配合。
中央阀筒部61的外周壁形成有沿着径向R贯通中央阀筒部61的两组中央 阀通孔(中央阀第一通孔61h1和中央阀第二通孔61h2)，这两组中央阀通孔在轴向A上彼此间隔开。其中中央阀第一通孔61h1与形成于转子主体的中心孔2h处的第一开口对应，中央阀第二通孔61h2与形成于转子主体的中心孔2h处的第二开口对应。
另外，中央阀筒部61例如通过螺纹连接的方式安装固定于凸轮轴。
弹簧盖4从轴向一侧固定于定子，端盖3从轴向另一侧固定于定子。凸轮轴相位器用插入件1的第三筒部15位于弹簧盖4的径向内侧。卷簧5安装于弹簧盖4的轴向一侧的端面且卷簧5由第三筒部15从径向内侧支撑(如图2c所示)，卷簧5的一端固定于弹簧盖4上形成的凸起且卷簧5的另一端固定于凸轮轴相位器用插入件1的卡接部的缺口151处。这样，相比现有技术的凸轮轴相位器省略了固定于转子2的固定销，并且同样能够防止卷簧5从弹簧盖4脱落。
虽然在以上的具体实施方式中对本发明的技术方案进行了详细地阐述，但是还需要说明的是：
1.虽然在以上的具体实施方式中说明了第三筒部15沿着周向延伸的长度为半周，但是本发明不限于此。在本发明中，第三筒部15沿着周向延伸的长度可以大于半周，即第三筒部15的周向长度对应的中心角可以大于180度。
2.虽然在以上的具体实施方式中说明了第一连接部12和第二连接部13均沿着径向R延伸，但是本发明不限于此。第一连接部12和第二连接部13可以相对于径向R倾斜地延伸。
3.虽然在以上的具体实施方式中没有说明，但是根据本发明的凸轮轴相位器也可以具有与现有技术的凸轮轴相位器的外盖60相同的外盖。
4.另外，根据本发明的凸轮轴相位器用插入件和凸轮轴相位器还可以具有如下的优点。
该凸轮轴相位器用插入件1是一体件且优选通过一次加工成型，因此该插入件1的各筒部的同轴公差非常小，使得方便了中央阀6的装配。
由于采用根据本发明的凸轮轴相位器用插入件1代替了图1a中的现有技术的凸轮轴相位器的固定销50，因此节省了空间并且降低了成本，另外转子也无需形成用于安装固定销50的固定销安装孔，使得成本降低。
由于采用根据本发明的凸轮轴相位器用插入件1，转子2可以具有较小的轴向宽度，因此能够减小整个凸轮轴相位器的轴向宽度，重量也相应地降低了。

Claims (10)

  1. 一种凸轮轴相位器用插入件，所述凸轮轴相位器用插入件用于部分地插入并安装于凸轮轴相位器的转子的中心孔，所述凸轮轴相位器用插入件整体具有阶梯筒状并且包括彼此相连且同轴地配置的第一筒部、第二筒部和第三筒部，
    所述第一筒部沿着轴向延伸，所述第二筒部位于所述第一筒部的轴向一侧且沿着轴向延伸，所述第三筒部位于所述第二筒部的轴向一侧且沿着轴向延伸，所述第三筒部形成有用于固定所述凸轮轴相位器的卷簧的卡接部，并且
    所述第一筒部的外径小于所述第二筒部的外径，所述第二筒部的外径小于所述第三筒部的外径。
  2. 根据权利要求1所述的凸轮轴相位器用插入件，其特征在于，所述凸轮轴相位器用插入件还包括第一连接部和第二连接部，所述第一连接部从所述第一筒部的轴向一侧的端缘朝向径向外侧延伸，所述第一连接部的径向外侧的端缘与所述第二筒部相连，所述第二连接部从所述第二筒部的轴向一侧的端缘朝向径向外侧延伸，所述第二连接部的径向外侧的端缘与所述第三筒部相连，
    优选地，所述凸轮轴相位器用插入件的各筒部和连接部一体地形成。
  3. 根据权利要求1或2所述的凸轮轴相位器用插入件，其特征在于，
    所述第三筒部沿着周向在部分圆周上延伸，所述卡接部形成于所述第三筒部的周向端部，
    优选地，所述第三筒部沿着周向延伸的长度为半周或大于半周。
  4. 根据权利要求3所述的凸轮轴相位器用插入件，其特征在于，所述卡接部包括在所述第三筒部的周向端部形成的缺口以及从形成该缺口的底边朝向径向内侧折回的钩部。
  5. 根据权利要求1至4中任一项所述的凸轮轴相位器用插入件，其特征在 于，所述第二筒部形成有沿着径向贯通所述第二筒部且在周向上分布的多个通孔。
  6. 一种凸轮轴相位器，所述凸轮轴相位器包括：
    定子和位于定子的径向内侧且能够相对于所述定子转动的转子，所述转子形成有在轴向上贯通所述转子的中心孔；以及
    权利要求1至5中任一项所述的凸轮轴相位器用插入件，所述凸轮轴相位器用插入件固定于所述转子，所述凸轮轴相位器用插入件的所述第一筒部、所述第一连接部和所述第二筒部插入所述中心孔内且所述第二连接部抵接于所述转子的轴向一侧的端面。
  7. 根据权利要求6所述的凸轮轴相位器，其特征在于，所述第二筒部的外径大于所述中心孔的直径，使得所述第二筒部以与所述转子过盈配合的方式安装于所述中心孔内。
  8. 根据权利要求6或7所述的凸轮轴相位器，其特征在于，所述凸轮轴相位器用插入件的内部用于供中央阀插入安装，所述中央阀整体具有圆筒形状并且包括沿着轴向延伸的中央阀筒部和从所述中央阀筒部朝向径向外侧延伸的凸缘部，所述中央阀筒部插入所述第一筒部并且与所述第一筒部间隙配合，并且所述凸缘部抵接于所述第二连接部的轴向一侧的表面。
  9. 根据权利要求6至8中任一项所述的凸轮轴相位器，其特征在于，所述凸轮轴相位器还包括弹簧盖和卷簧，
    所述弹簧盖从轴向一侧固定于所述定子且所述第三筒部位于所述弹簧盖的径向内侧，并且
    所述卷簧安装于所述弹簧盖的轴向一侧的端面且所述卷簧由所述第三筒部从径向内侧支撑，所述卷簧的一端固定于所述弹簧盖且所述卷簧的另一端固定于所述凸轮轴相位器用插入件的卡接部。
  10. 根据权利要求6至9中任一项所述的凸轮轴相位器，其特征在于，所 述转子和所述定子之间形成沿着周向分布的多组油腔，各组油腔均包括彼此相邻的第一油腔和第二油腔，所述转子的内部形成有分别与所述第一油腔连通的第一油路和分别与所述第二油腔连通的第二油路，各所述第一油路在所述转子的中心孔处的第一开口与各所述第二油路在所述转子的中心孔处的第二开口在轴向上不重叠，并且
    形成于所述第二筒部的通孔分别与所述第二开口相对，并且优选地所述第一筒部在轴向上位于所述第一开口和所述第二开口之间。
PCT/CN2018/107304 2018-09-25 2018-09-25 凸轮轴相位器用插入件及凸轮轴相位器 WO2020061739A1 (zh)

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US17/275,829 US11542843B2 (en) 2018-09-25 2018-09-25 Insertion piece for camshaft phaser and camshaft phaser
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