WO2019113826A1 - 凸轮轴相位器 - Google Patents

凸轮轴相位器 Download PDF

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Publication number
WO2019113826A1
WO2019113826A1 PCT/CN2017/115894 CN2017115894W WO2019113826A1 WO 2019113826 A1 WO2019113826 A1 WO 2019113826A1 CN 2017115894 W CN2017115894 W CN 2017115894W WO 2019113826 A1 WO2019113826 A1 WO 2019113826A1
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WO
WIPO (PCT)
Prior art keywords
cover
camshaft phaser
spring cover
stator
spring
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Application number
PCT/CN2017/115894
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English (en)
French (fr)
Inventor
全婷
Original Assignee
舍弗勒技术股份两合公司
全婷
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Application filed by 舍弗勒技术股份两合公司, 全婷 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2017/115894 priority Critical patent/WO2019113826A1/zh
Publication of WO2019113826A1 publication Critical patent/WO2019113826A1/zh

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    • 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.
  • the camshaft phaser includes a lock cover 10 and a seal cover 20 at axially opposite ends, respectively, and the lock cover 10 and the seal cover 20 function as a camshaft phaser.
  • the end caps are spaced apart from one another on the shaft.
  • the stator 30 and the rotor 60 of the camshaft phaser are both mounted between the seal cap 20 and the lock cover 10, the stator 30 is located radially outward of the rotor 60, and the rotor 60 is rotatable relative to the stator 30.
  • the stator 30 is fixed to the lock cover 10 and the seal cover 20 by a fixing bolt 50.
  • a pulley 40 is also mounted on the radially outer side of the stator 30 for transmitting the driving force to the camshaft phaser.
  • the sealing effect can be ensured to a certain extent by adopting the above means, the cost of the resin infiltration treatment is high and the quality is unstable, so that the cost of the prior art camshaft phaser is too high and the sealing performance cannot be ensured, and The structure used for sealing in the camshaft phaser is complicated. Further, the camshaft phaser having the above configuration cannot be used in combination with a center-mounted solenoid valve as a hydraulic oil supply control valve.
  • 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 it provides a more good sealing effect than a prior art camshaft phaser sealing structure.
  • the present invention adopts the following technical solutions.
  • the present invention provides a camshaft phaser comprising: a spring cover and a sealing cover, the spring cover and the sealing cover forming an outer casing of the camshaft phaser and being covered by the spring
  • the sealing cover encloses an installation space; a stator, the stator is mounted in the installation space and the stator is fixed with the sealing cover; and a rotor, the rotor is installed in the installation space and located at the a radially inner side of the stator, and the rotor is rotatable relative to the stator, a plurality of oil chambers are formed between the rotor and the stator, wherein the spring cover and the sealing cover are in contact with each other
  • the portions are fixed to each other in a liquid-tight manner and the portions in contact with each other are located radially outward of the stator.
  • the spring cover and the sealing cover are fixed together at the portions contacting each other by a first connecting member, at which a sealing ring is disposed between the spring cover and the sealing cover.
  • the seal ring is located radially inward of the first connecting member.
  • the spring cover is in a rotating structure having a central axis and includes: a first radial portion of the spring cover extending in a radial direction; a first axial portion of the spring cover from the first radial direction of the spring cover a portion of the radially outer end extending axially toward the other side of the axial direction; and a second radial portion of the spring cover from the axially other side end of the first axial portion of the spring cover along the diameter Extending radially outward, a portion of the spring cover that is in contact with the sealing cover is located at a second radial portion of the spring cover.
  • the spring cover further includes a second axial portion of the spring cover, the second axial portion of the spring cover being axially oriented from the radially inner end of the first radial portion of the spring cover toward the axial direction
  • the side extends such that a first passage for the center-mounted solenoid valve to extend into the installation space is formed in the second axial portion of the spring cover.
  • the sealing cover is in a rotating structure having a central axis and includes: a sealing cover radial portion extending in a radial direction and including a radially outer portion, the portion of the sealing cover contacting the spring cover being located a radially outer portion; and a sealing cover axial portion extending from a radially inner end of the radial portion of the sealing cover along an axial direction toward the other axial side such that the axial portion of the sealing cover A second passage is formed for the camshaft to extend into the installation space.
  • a portion of the sealing cover that is in contact with the spring cover is formed with a groove for mounting the sealing ring, the sealing ring extending over the entire circumference in the circumferential direction.
  • the camshaft phaser further includes a driving wheel that transmits a driving force to the camshaft phaser, the driving wheel being fixed to the spring cover and the sealing cover by the first connecting member.
  • the camshaft phaser further includes a lock cover mounted in the installation space, the lock cover is located on an axial side of the stator, and the lock cover passes through the second connecting member The stator and the sealing cover are fixed together.
  • stator and the rotor are each formed by sintering.
  • the camshaft phaser is a dry belt camshaft phaser.
  • the present invention provides a novel camshaft phaser which fixes a spring cover and a sealing cover which are mutually contacting as a casing and provides a sealing ring only between the spring cover and the sealing cover, thereby The effect of the oil chamber of the camshaft phaser relative to the outer seal is achieved.
  • the new camshaft phaser has no need for resin impregnation treatment of the stator compared with the sealing structure of the prior art camshaft phaser, and the structure is simpler and provides a better sealing effect and greatly reduces the sealing effect. cost.
  • Figure 1a is a cross-sectional view of a prior art camshaft phaser
  • Figure 1b is a side view of the camshaft phaser of Figure 1a as viewed from the axial side
  • Figure 1c is a view from the other side of the axial direction Side view of the camshaft phaser in 1a.
  • FIG. 2a is a schematic cross-sectional view of a camshaft phaser in accordance with an embodiment of the present invention
  • FIG. 2b is a partially enlarged schematic view of the camshaft phaser of FIG. 2a, showing the camshaft phaser of FIG. 2a
  • Figure 2c is another schematic cross-sectional view of the camshaft phaser of Figure 2a
  • Figure 2d is a side view of the camshaft phaser of Figure 2a as viewed from the axial side
  • Figure 2e is from the axial direction Side view of the camshaft phaser in Figure 2a as viewed on one side.
  • Figure 3 is a perspective view of the spring cover of the camshaft phaser of Figure 2a.
  • FIG. 4a is a perspective view of the sealing cover of the camshaft phaser of FIG. 2a; and FIG. 4b is another perspective view of the sealing cover of the camshaft phaser of FIG. 2a.
  • lock cover 20 seal cover 30 stator 301, 302 seal ring 40 pulley 50 fixing bolt 60 rotor
  • 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, respectively.
  • “Axial side” refers to the left side in Figures 2a to 2c; “axial side” refers to the right side in Figures 2a to 2c.
  • the camshaft phaser As shown in FIGS. 2a to 2e, the camshaft phaser according to an embodiment of the present invention has a substantially cylindrical shape as a whole.
  • the camshaft phaser includes a spring cover 1, a sealing cover 2, a drive wheel 3, a first connecting member 4, a stator 5, a rotor 6, a lock cover 7, a return coil spring 8, and a second connecting member 9.
  • both the spring cover 1 and the seal cover 2 constitute the outer casing of the camshaft phaser and enclose an installation space S therebetween.
  • the stator 5, the rotor 6, the lock cover 7, and the return coil spring 8 are all mounted in the installation space S.
  • the spring cover 1 has a rotating structure having a central axis, and the spring cover 1 has a shape as follows: two cylinders are connected to each other and have an outer diameter The other axial side end of the larger cylinder is formed with a flange (corresponding to the spring cover second radial portion 13 of the spring cover, that is, the radially outer portion of the spring cover 1).
  • the spring cover 1 is formed, for example, by bending a plurality of times.
  • the spring cover 1 includes a spring cover first radial portion 11, a spring cover first axial portion 12, a spring cover second radial portion 13 and a spring cover second axial portion 14.
  • the spring cover first radial portion 11 extends in the radial direction R.
  • the spring cover first axial portion 12 extends from the radially outer end of the first radial portion 11 of the spring cover along the axial direction A toward the other side of the axial direction.
  • the spring cover second radial portion 13 as the radially outer portion of the spring cover 1 extends from the axially other side end of the first axial portion 12 of the spring cover toward the radially outer side in the radial direction R, and the spring cover is second The radial portion 13 is in contact with a radially outer portion 221 of the seal cover 2 which will be described later from the axial side.
  • the spring cover second axial portion 14 extends from the radially inner end of the first radial portion 11 of the spring cover toward the axial one side along the axial direction A such that it is formed in the second axial portion 14 of the spring cover for centering
  • a solenoid valve projects into the first passage S1 of the installation space S.
  • the first radial portion 11 of the spring cover and the first axial portion 12 of the spring cover and the sealing cover 2 form a sufficiently large installation space S; at the radially outer portion of the second radial portion 13 of the spring cover and the sealing cover 2
  • the second radial portion 13 of the spring cover is fixedly connected to the sealing cover 2 by the first connecting member 4 in the case of contact 221, so that the sealing effect can be improved;
  • the first passage S1 is formed by the second axial portion 14 of the spring cover, so that
  • the camshaft phaser of the present invention can be used with a center-mounted solenoid valve, and the second axial portion 14 of the spring cover cooperates with other configurations of the engine to provide a sealing action for the center-mounted solenoid valve.
  • the sealing cover 2 has a rotating structure having a central axis, and a cam shaft (not shown) is formed at the center of the sealing cover 2. Extending into the second passage S2 of the installation space S, the cam shaft can be fixed to the rotor 6 through the second passage S2.
  • the sealing cover 2 includes a sealing cover radial portion 22 and a sealing cover axial portion 23 and is formed, for example, by one bending.
  • the sealing cover radial portion 22 extends along the radial direction R and includes a radially outer portion 221 of the sealing cover 2 for fixed connection with the spring cover second radial portion 13 and a radial direction at the radially outer portion The radially inner side portion 222 of the inner side.
  • the radially outer portion 221 of the seal cover 2 is a portion of the seal cover radial portion 22 that overlaps the second cover portion 13 of the spring cover in the radial direction R.
  • the sealing cap axial portion 23 extends from the radially inner end of the sealing cover radial portion 22 along the axial direction toward the other axial side such that a second passage S2 is formed in the sealing cap axial portion 23.
  • the radially outer portion 221 of the seal cover 2 is formed with a through hole 223 through which the first connecting member 4 passes, and a groove 24 for mounting the seal ring 21 is formed on one axial side of the radially outer portion 221, the recess The groove 24 is located radially inward of the through hole 223.
  • the second radial portion 13 of the spring cover can be sealed (the radially outer portion of the spring cover 1)
  • the gap between the radially outer portion 221 of the sealing cover 2 further ensures the sealing effect (liquid-tight effect) of the oil chamber inside the camshaft phaser with respect to the outside.
  • the seal ring 21 extends over the entire circumference in the circumferential direction C.
  • the drive wheel 3 is used to transmit the driving force from the engine to the camshaft phaser. As shown in Figures 2a to 2c, the drive wheel 3 includes a drive wheel axial portion 31 and a drive wheel radial portion 32 that are coupled to each other.
  • the drive wheel axial portion 31 is located radially outward of both the second radial portion 13 of the spring cover (the radially outer portion of the spring cover 1) and the radially outer portion 221 of the seal cover 2 and extends along the axial direction A to drive
  • the outer peripheral surface of the wheel axial portion 31 forms a plurality of teeth along the circumferential direction C.
  • the drive wheel radial portion 32 extends radially inward from the other axial end of the drive wheel axial portion 31, the drive wheel radial portion 32 from the other axial side and the radially outer portion of the seal cover 2
  • the 221 contacts and serves to be fixed together with the radially outer portion 221 of the sealing cover 2 by the first connecting member 4.
  • the spring cover second radial portion 13 (the radially outer portion of the spring cover 1), the radially outer portion 221 of the seal cover 2, and the drive wheel radial portion 32 are shown.
  • first connecting members 4 each of the first connecting members 4 passing through the spring cover second radial portion 13 (the radially outer portion of the spring cover 1) along the axial direction A, the sealing cover 2
  • the radially outer portion 221 and the drive wheel radial portion 32 secure the spring cover 1, the sealing cover 2 and the drive wheel 3 together.
  • four first connecting members 4 are uniformly disposed along the circumferential direction C to ensure a firm fixing effect.
  • the first connector 4 is preferably a bolt or a screw.
  • the stator 5 is located radially inward of the first axial portion 12 of the spring cover, and the stator 5 is connected to the radially inner portion 222 of the sealing cover 2 via the second connecting member 9.
  • the rotor 6 is located radially inward of the stator 5 and is rotatable relative to the stator 5, and a plurality of oil chambers are formed between the rotor 6 and the stator 5.
  • the lock cover 7 is located radially inward of the first axial portion 12 of the spring cover and on the axial side of the stator 5, and the lock cover 7 passes through the second joint member 9 and the radially inner portion 222 of the stator 5 and the seal cover 2 Fixed together.
  • the second connecting member 9 is preferably a bolt, and the bolt passes through the sealing cover 2 and the stator 5 from the other side in the axial direction A and is fixed to the locking cover. 7 and the bolt head of the bolt is pressed against the sealing cover 2 by the sealing gasket 91, thus ensuring the seal at the joint between the bolt as the second connecting member 9 and the sealing cover 2.
  • four second connecting members 9 are uniformly disposed along the circumferential direction C to ensure a firm fixing effect.
  • the return coil spring 8 is disposed on one axial side of the lock cover 7, one end of the return coil spring 8 is fixed to the lock cover 7, and the other end of the return coil spring 8 is fixed to the rotor 6, the return position
  • the action of the coil spring 8 is the same as that of the return spring of the prior art camshaft phaser and the axial dimension is significantly reduced, which facilitates the compact construction of the camshaft phaser of the present invention.
  • the drive wheel 3 of the camshaft phaser according to the invention is preferably a pulley.
  • the camshaft phaser according to the present invention is preferably a dry camshaft phaser, and the dry camshaft phaser seals the inner oil chamber with respect to the outside.
  • the camshaft phaser according to the invention is preferably suitable for dry camshaft phasers.
  • first connecting member 4 may also be a bolt.
  • number of the first connecting member 4 and the second connecting member 9 is not limited to the number explained in the above embodiment, but may be any number as needed.
  • the number of the seal rings 21 is not limited to the one described in the above embodiment, but a plurality of seal rings 21 may be disposed concentrically to improve the sealing effect.
  • the present invention is not limited thereto.
  • the spring cover 1, the seal cover 2, and the drive wheel 3 can be fixed together by welding, so that the seal ring 21 can be omitted between the spring cover 1 and the seal cover 2.
  • stator 5 and the rotor 6 of the camshaft phaser of the present invention are preferably formed by sintering to sufficiently ensure, for example, the strength of the stator 5 and the rotor 6, etc. Mechanical properties.
  • liquid-tight means a sealed state in which a liquid (for example, oil) does not leak from a gap between the spring cover 1 and the seal cover 2 which are fixed to each other.
  • the camshaft phaser of the present invention described in the above embodiments can be improved based on the existing camshaft phaser (the drive wheel is a pulley camshaft phaser), so that the existing The structure of the camshaft phaser can be obtained without a large change, and a good sealing effect can be obtained, and the cost is reduced by at least 20%, which is advantageous for large-scale industrial production.

Abstract

一种凸轮轴相位器包括：弹簧盖（1）和密封盖（2），弹簧盖（1）和密封盖（2）构成凸轮轴相位器的外壳并且在两者之间围成安装空间（S）；定子（5），其安装于安装空间（S）内且定子（5）与密封盖（2）固定在一起；以及转子（6），其安装于安装空间（S）内且位于定子（5）的径向内侧，并且转子（6）能够相对于定子（5）转动，转子（6）与定子（5）之间形成多个油腔；其中弹簧盖（1）和密封盖（2）以在彼此接触的部位处液密的方式彼此固定在一起并且该部位位于定子（5）的径向外侧。这样的凸轮轴相位器结构简单，并且提供了良好的密封效果而且降低了成本。

Description

凸轮轴相位器 技术领域
本发明涉及凸轮轴相位器。
背景技术
在现有技术中，如图1a至图1c所示，凸轮轴相位器包括分别位于轴向两侧端的锁止盖10和密封盖20，锁止盖10和密封盖20用作凸轮轴相位器的端盖且在轴上彼此间隔开。凸轮轴相位器的定子30和转子60均安装于密封盖20和锁止盖10之间，定子30位于转子60的径向外侧，并且转子60能够相对于定子30转动。定子30通过固定螺栓50与锁止盖10和密封盖20相对固定。在定子30的径向外侧面还固定有带轮40，该带轮40用于将驱动力传递到凸轮轴相位器。
在具有如图1a至图1c所示的结构的现有技术的凸轮轴相位器中，为了保证凸轮轴相位器的正常工作，要求在定子30和转子60之间形成的油腔相对于凸轮轴相位器的外部具有非常好的密封效果。在现有技术中，为了实现上述良好的密封效果，一方面，需要对定子30进行树脂浸渗处理，以尽可能消除定子30表面的凹凸；另一方面，需要在定子30与锁止盖10以及定子30与密封盖20之间分别设置密封圈301、302。
通过采用上述手段虽然能够在一定程度上保证密封效果，但是由于树脂浸渗处理的成本高且品质不稳定，导致现有技术的凸轮轴相位器的成本过高且密封性能不能得到保证，同时该凸轮轴相位器中用于密封的结构复杂。另外，具有上述结构的凸轮轴相位器还不能与作为液压油供给控制阀的中置式电磁阀配套使用。
发明内容
基于上述现有技术的缺陷而做出了本发明。本发明的目的在于提供一种凸轮轴相位器，使得其与现有技术的凸轮轴相位器的密封结构相比在结构简单的同时提供了更加良好的密封效果。
为此，本发明采用如下的技术方案。
本发明提供了一种凸轮轴相位器，所述凸轮轴相位器包括：弹簧盖和密封盖，所述弹簧盖和所述密封盖构成所述凸轮轴相位器的外壳并且由所述弹簧盖和所述密封盖围成安装空间；定子，所述定子安装于所述安装空间内且所述定子与所述密封盖固定在一起；以及转子，所述转子安装于所述安装空间内且位于所述定子的径向内侧，并且所述转子能够相对于所述定子转动，所述转子与所述定子之间形成多个油腔，其中，所述弹簧盖和所述密封盖以在彼此接触的部位处液密的方式彼此固定在一起并且所述彼此接触的部位位于所述定子的径向外侧。
优选地，所述弹簧盖和所述密封盖在所述彼此接触的部位处通过第一连接件固定在一起，在该部位处所述弹簧盖和所述密封盖之间设置有密封圈，所述密封圈位于所述第一连接件的径向内侧。
优选地，所述弹簧盖呈具有中心轴线的旋转结构且包括：弹簧盖第一径向部分，其沿着径向延伸；弹簧盖第一轴向部分，其从所述弹簧盖第一径向部分的径向外侧端沿着轴向朝向轴向另一侧延伸；以及弹簧盖第二径向部分，其从所述弹簧盖第一轴向部分的轴向另一侧端沿着所述径向朝向径向外侧延伸，所述弹簧盖的与所述密封盖接触的部位位于所述弹簧盖第二径向部分。
更优选地，所述弹簧盖还包括弹簧盖第二轴向部分，所述弹簧盖第二轴向部分从所述弹簧盖第一径向部分的径向内侧端沿着轴向朝向轴向一侧延伸，使得在所述弹簧盖第二轴向部分内形成用于供中置式电磁阀伸入所述安 装空间的第一通道。
优选地，所述密封盖呈具有中心轴线的旋转结构且包括：密封盖径向部分，其沿着径向延伸且包括径向外侧部，所述密封盖的与所述弹簧盖接触的部位位于所述径向外侧部；以及密封盖轴向部分，其从所述密封盖径向部分的径向内侧端沿着轴向朝向轴向另一侧延伸，使得在所述密封盖轴向部分内形成用于供凸轮轴伸入所述安装空间的第二通道。
更优选地，所述密封盖的与所述弹簧盖接触的部位形成有用于安装所述密封圈的凹槽，所述密封圈沿着周向在整周上延伸。
优选地，所述凸轮轴相位器还包括向所述凸轮轴相位器传递驱动力的驱动轮，所述驱动轮与所述弹簧盖和所述密封盖通过所述第一连接件固定在一起。
优选地，所述凸轮轴相位器还包括安装于所述安装空间内的锁止盖，所述锁止盖位于所述定子的轴向一侧，所述锁止盖通过第二连接件与所述定子和所述密封盖固定在一起。
优选地，所述定子和所述转子均通过烧结形成。
优选地，所述凸轮轴相位器为干式皮带凸轮轴相位器。
通过采用上述技术方案，本发明提供了一种新型的凸轮轴相位器，其将作为外壳的互相接触的弹簧盖和密封盖固定在一起并且仅在弹簧盖和密封盖之间设置密封圈，从而实现凸轮轴相位器的油腔相对于外部密封的效果。这样，该新型的凸轮轴相位器与现有技术的凸轮轴相位器的密封结构相比，无需对定子进行树脂浸渗处理，结构更加简单的同时提供了更加良好的密封效果并极大地降低了成本。
附图说明
图1a是现有技术的凸轮轴相位器的剖视示意图；图1b是从轴向一侧观察 的图1a中的凸轮轴相位器的侧视图；图1c是从轴向另一侧观察的图1a中的凸轮轴相位器的侧视图。
图2a是根据本发明的一实施方式的凸轮轴相位器的剖视示意图；图2b是图2a中的凸轮轴相位器的局部放大示意图，其示出了图2a中的凸轮轴相位器的上半部分；图2c是图2a中的凸轮轴相位器的另一剖视示意图；图2d是从轴向一侧观察的图2a中的凸轮轴相位器的侧视图；图2e是从轴向另一侧观察的图2a中的凸轮轴相位器的侧视图。
图3是图2a中的凸轮轴相位器的弹簧盖的立体示意图。
图4a是图2a中的凸轮轴相位器的密封盖的立体示意图；图4b是图2a中的凸轮轴相位器的密封盖的另一立体示意图。
附图标记说明
10锁止盖 20密封盖 30定子 301、302密封圈 40带轮 50固定螺栓 60转子
1弹簧盖 11弹簧盖第一径向部分 12弹簧盖第一轴向部分 13弹簧盖第二径向部分 14弹簧盖第二轴向部分 2密封盖 21密封圈 22密封盖径向部分 221径向外侧部 222径向内侧部 223通孔 23密封盖轴向部分 24凹槽 3驱动轮 31驱动轮轴向部分 32驱动轮径向部分 4第一连接件 5定子 6转子 7锁止盖 71锁止组件 8回位盘簧 9第二连接件 91密封垫圈
S安装空间 S1第一通道 S2第二通道 A轴向 R径向 C周向
具体实施方式
以下将结合说明书附图对本发明的技术方案进行说明。根据本发明的凸轮轴相位器整体具有大致圆柱形状，本发明的轴向、径向和周向分别是指凸 轮轴相位器的轴向、径向和周向。“轴向一侧”是指图2a至图2c中的左侧；“轴向另一侧”是指图2a至图2c中的右侧。
如图2a至图2e所示，根据本发明的一实施方式的凸轮轴相位器整体为大致圆柱形状。该凸轮轴相位器包括弹簧盖1、密封盖2、驱动轮3、第一连接件4、定子5、转子6、锁止盖7、回位盘簧8和第二连接件9。
在本实施方式中，如图2a至图2c所示，弹簧盖1和密封盖2两者构成凸轮轴相位器的外壳并且在两者之间围成安装空间S。定子5、转子6、锁止盖7和回位盘簧8均安装于该安装空间S内。
在本实施方式中，如图2a、图2b、图2c和图3所示，弹簧盖1呈具有中心轴线的旋转结构，该弹簧盖1整体呈如下形状：两个圆筒彼此相连且在外径较大的圆筒的轴向另一侧端形成有凸缘(对应于下述的弹簧盖第二径向部分13，也即弹簧盖1的径向外侧部)。该弹簧盖1例如通过多次弯折形成。
更具体地，在本实施方式中，弹簧盖1包括弹簧盖第一径向部分11、弹簧盖第一轴向部分12、弹簧盖第二径向部分13和弹簧盖第二轴向部分14。弹簧盖第一径向部分11沿着径向R延伸。弹簧盖第一轴向部分12从弹簧盖第一径向部分11的径向外侧端沿着轴向A朝向轴向另一侧延伸。作为弹簧盖1的径向外侧部的弹簧盖第二径向部分13从弹簧盖第一轴向部分12的轴向另一侧端沿着径向R朝向径向外侧延伸，并且弹簧盖第二径向部分13从轴向一侧与密封盖2的后述的径向外侧部221接触。弹簧盖第二轴向部分14从弹簧盖第一径向部分11的径向内侧端沿着轴向A朝向轴向一侧延伸，使得在弹簧盖第二轴向部分14内形成可以供中置式电磁阀(未示出)伸入安装空间S的第一通道S1。
这样，通过弹簧盖第一径向部分11和弹簧盖第一轴向部分12与密封盖2形成足够大的安装空间S；在弹簧盖第二径向部分13与密封盖2的径向外侧部221接触的情况下通过第一连接件4使弹簧盖第二径向部分13与密封盖2固定 连接，使得能够提高密封效果；通过弹簧盖第二轴向部分14形成第一通道S1，使得根据本发明的凸轮轴相位器能够与中置式电磁阀配套使用，并且弹簧盖第二轴向部分14与发动机的其它结构配合还能够起到对中置式电磁阀的密封作用。
在本实施方式中，如图2a、图2b、图2c、图4a和图4b所示，密封盖2呈具有中心轴线的旋转结构，在密封盖2的中央形成供凸轮轴(未示出)伸入安装空间S的第二通道S2，凸轮轴能够穿过第二通道S2与转子6固定在一起。密封盖2包括密封盖径向部分22和密封盖轴向部分23并且例如通过一次弯折形成。
具体地，密封盖径向部分22沿着径向R延伸且包括用于与弹簧盖第二径向部分13固定连接的密封盖2的径向外侧部221和位于该径向外侧部的径向内侧的径向内侧部222。在本实施方式中，密封盖2的径向外侧部221为密封盖径向部分22的在径向R上与弹簧盖第二径向部分13重叠的部分。密封盖轴向部分23从密封盖径向部分22的径向内侧端沿着轴向朝向轴向另一侧延伸，使得在密封盖轴向部分23内形成第二通道S2。
密封盖2的径向外侧部221形成有供第一连接件4穿过的通孔223并且在该径向外侧部221的轴向一侧面形成有供密封圈21安装的凹槽24，该凹槽24位于通孔223的径向内侧。这样，通过在该凹槽24内安装密封圈21并使得该密封圈21压抵于弹簧盖第二径向部分13，能够密封弹簧盖第二径向部分13(弹簧盖1的径向外侧部)和密封盖2的径向外侧部221两者之间的间隙，进一步保证了凸轮轴相位器的内部的油腔相对于外部的密封效果(液密效果)。在本实施方式中，密封圈21沿着周向C在整周上延伸。
在本实施方式中，驱动轮3用于将来自发动机的驱动力传递到凸轮轴相位器。如图2a至图2c所示，驱动轮3包括彼此相连的驱动轮轴向部分31和驱动轮径向部分32。
驱动轮轴向部分31位于弹簧盖第二径向部分13(弹簧盖1的径向外侧部)和密封盖2的径向外侧部221两者的径向外侧且沿着轴向A延伸，在驱动轮轴向部分31的外周面沿着周向C形成多个轮齿。驱动轮径向部分32从驱动轮轴向部分31的轴向另一侧端沿着径向朝向径向内侧延伸，驱动轮径向部分32从轴向另一侧与密封盖2的径向外侧部221接触并且用于与密封盖2的径向外侧部221通过第一连接件4固定在一起。
在本实施方式中，如图2a至图2c所示，弹簧盖第二径向部分13(弹簧盖1的径向外侧部)、密封盖2的径向外侧部221以及驱动轮径向部分32彼此接触且通过多个第一连接件4固定在一起，各第一连接件4沿着轴向A穿过弹簧盖第二径向部分13(弹簧盖1的径向外侧部)、密封盖2的径向外侧部221和驱动轮径向部分32以将弹簧盖1、密封盖2和驱动轮3固定在一起。如图2d所示，沿着周向C均匀地设置四个第一连接件4，以保证牢固的固定效果。第一连接件4优选为螺栓或螺钉。
在本实施方式中，如图2a至图2c所示，定子5位于弹簧盖第一轴向部分12的径向内侧，定子5通过第二连接件9与密封盖2的径向内侧部222连接，并且转子6位于定子5的径向内侧并且能够相对于定子5转动，转子6与定子5之间形成多个油腔。锁止盖7位于弹簧盖第一轴向部分12的径向内侧且位于定子5的轴向一侧，锁止盖7通过第二连接件9与定子5和密封盖2的径向内侧部222固定在一起。
在本实施方式中，如图2a至图2c所示，第二连接件9优选为螺栓，螺栓从轴向另一侧沿着轴向A穿过密封盖2和定子5并固定于锁止盖7且螺栓的螺栓头通过密封垫圈91压抵于密封盖2，这样保证了作为第二连接件9的螺栓与密封盖2之间的连接部位处的密封。如图2e所示，沿着周向C均匀地设置四个第二连接件9，以保证牢固的固定效果。
进一步地，回位盘簧8设置于锁止盖7的轴向一侧，回位盘簧8的一端固 定于锁止盖7，回位盘簧8的另一端固定于转子6，该回位盘簧8的作用与现有技术的凸轮轴相位器的回位弹簧的作用相同且轴向尺寸明显减小，这样有利于本发明的凸轮轴相位器的结构紧凑。
与现有技术的凸轮轴相位器的工作过程类似地，当根据本发明的凸轮轴相位器处于未起调相作用的初始状态时，转子6处于初始位置，转子6通过锁止组件71(如图2c所示)与锁止盖7相对固定，从而锁止转子6与定子5的相对转动；当根据本发明的凸轮轴相位器需要进入起调相作用的工作状态时，需要转子6从初始位置相对于定子5转动，这时通过例如中置式电磁阀向油腔内供给的液压油解除锁止组件71对转子6相对于锁止盖7的锁止，使得转子6能够相对于定子5转动；当根据本发明的凸轮轴相位器需要从工作状态返回初始状态时，通过回位盘簧8使转子6回位到初始位置并通过锁止组件71再次锁止转子6与定子5的相对转动。
虽然以上的具体实施方式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.根据本发明的凸轮轴相位器的驱动轮3优选为带轮。
2.虽然在以上的具体实施方式中没有明确说明，但是根据本发明的凸轮轴相位器优选为干式凸轮轴相位器，干式凸轮轴相位器对其内部的油腔相对于外部的密封效果要求更高，因此根据本发明的凸轮轴相位器优选适用于干式凸轮轴相位器。
3.虽然在以上的具体实施方式中没有明确说明，但是应当理解第一连接件4也可以是螺栓。进一步地，第一连接件4和第二连接件9的数量不限于上述实施方式中说明的数量，而是可以根据需要采用任意数量。另外，密封圈21的数量不限于上述具体实施方式中说明的一条，而是可以同心地设置多条密封圈21来提高密封效果。
4.虽然在以上的具体实施方式中说明了弹簧盖1、密封盖2和驱动轮3通 过第一连接件4进行固定连接，但是本发明不限于此。例如可以使弹簧盖1、密封盖2和驱动轮3三者通过焊接固定在一起，这样在弹簧盖1和密封盖2之间可以省略密封圈21。
5.虽然在以上的具体实施方式中没有明确说明，但是应当理解本发明的凸轮轴相位器的定子5和转子6均优选地通过烧结形成，以充分地保证定子5和转子6的例如强度等的机械性能。
6.在本发明中，“液密”是指液体(例如油)不会从彼此固定的弹簧盖1和密封盖2之间的间隙泄漏的密封状态。
7.以上具体实施方式中说明的本发明的凸轮轴相位器可以基于现有的凸轮轴相位器(驱动轮为带轮的凸轮轴相位器)的基础上进行改进获得，这样在对现有的凸轮轴相位器的结构不进行大幅改变的基础上可以获得良好的密封效果，并降低至少20％的成本，有利于大规模的工业生产。

Claims (10)

  1. 一种凸轮轴相位器，其特征在于，所述凸轮轴相位器包括：
    弹簧盖和密封盖，所述弹簧盖和所述密封盖构成所述凸轮轴相位器的外壳并且由所述弹簧盖和所述密封盖围成安装空间；
    定子，所述定子安装于所述安装空间内且所述定子与所述密封盖固定在一起；以及
    转子，所述转子安装于所述安装空间内且位于所述定子的径向内侧，并且所述转子能够相对于所述定子转动，所述转子与所述定子之间形成多个油腔，
    其中，所述弹簧盖和所述密封盖以在彼此接触的部位处液密的方式彼此固定在一起并且所述彼此接触的部位位于所述定子的径向外侧。
  2. 根据权利要求1所述的凸轮轴相位器，其特征在于，所述弹簧盖和所述密封盖在所述彼此接触的部位处通过第一连接件固定在一起，在该部位处所述弹簧盖和所述密封盖之间设置有密封圈，所述密封圈位于所述第一连接件的径向内侧。
  3. 根据权利要求1或2所述的凸轮轴相位器，其特征在于，所述弹簧盖呈具有中心轴线的旋转结构且包括：
    弹簧盖第一径向部分，其沿着径向延伸；
    弹簧盖第一轴向部分，其从所述弹簧盖第一径向部分的径向外侧端沿着轴向朝向轴向另一侧延伸；以及
    弹簧盖第二径向部分，其从所述弹簧盖第一轴向部分的轴向另一侧端沿着所述径向朝向径向外侧延伸，所述弹簧盖的与所述密封盖接触的部位位于所述弹簧盖第二径向部分。
  4. 根据权利要求3所述的凸轮轴相位器，其特征在于，所述弹簧盖还包括弹簧盖第二轴向部分，所述弹簧盖第二轴向部分从所述弹簧盖第一径向部分的径向内侧端沿着轴向朝向轴向一侧延伸，使得在所述弹簧盖第二轴向部 分内形成用于供中置式电磁阀伸入所述安装空间的第一通道。
  5. 根据权利要求1至4中任一项所述的凸轮轴相位器，其特征在于，所述密封盖呈具有中心轴线的旋转结构且包括：
    密封盖径向部分，其沿着径向延伸且包括径向外侧部，所述密封盖的与所述弹簧盖接触的部位位于所述径向外侧部；以及
    密封盖轴向部分，其从所述密封盖径向部分的径向内侧端沿着轴向朝向轴向另一侧延伸，使得在所述密封盖轴向部分内形成用于供凸轮轴伸入所述安装空间的第二通道。
  6. 根据权利要求2至5中任一项所述的凸轮轴相位器，其特征在于，所述密封盖的与所述弹簧盖接触的部位形成有用于安装所述密封圈的凹槽，所述密封圈沿着周向在整周上延伸。
  7. 根据权利要求2至6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向所述凸轮轴相位器传递驱动力的驱动轮，所述驱动轮与所述弹簧盖和所述密封盖通过所述第一连接件固定在一起。
  8. 根据权利要求1至7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安装于所述安装空间内的锁止盖，所述锁止盖位于所述定子的轴向一侧，所述锁止盖通过第二连接件与所述定子和所述密封盖固定在一起。
  9. 根据权利要求1至8中任一项所述的凸轮轴相位器，其特征在于，所述定子和所述转子均通过烧结形成。
  10. 根据权利要求1至9中任一项所述的凸轮轴相位器，其特征在于，所述凸轮轴相位器为干式皮带凸轮轴相位器。
PCT/CN2017/115894 2017-12-13 2017-12-13 凸轮轴相位器 WO2019113826A1 (zh)

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Publication number Priority date Publication date Assignee Title
US6276321B1 (en) * 2000-01-11 2001-08-21 Delphi Technologies, Inc. Cam phaser having a torsional bias spring to offset retarding force of camshaft friction
CN1619113A (zh) * 2003-11-17 2005-05-25 博格华纳公司 凸轮扭矩致动相位器
CN103291399A (zh) * 2012-02-02 2013-09-11 谢夫勒科技股份两合公司 容积存储器在凸轮轴调节器中的布置方案
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