WO2023077527A1 - 用于凸轮轴的相位调节器 - Google Patents

用于凸轮轴的相位调节器 Download PDF

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Publication number
WO2023077527A1
WO2023077527A1 PCT/CN2021/129397 CN2021129397W WO2023077527A1 WO 2023077527 A1 WO2023077527 A1 WO 2023077527A1 CN 2021129397 W CN2021129397 W CN 2021129397W WO 2023077527 A1 WO2023077527 A1 WO 2023077527A1
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WIPO (PCT)
Prior art keywords
rotor
piston
camshaft
phase adjuster
filter
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PCT/CN2021/129397
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English (en)
French (fr)
Inventor
盛慧芳
全婷
Original Assignee
舍弗勒技术股份两合公司
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Application filed by 舍弗勒技术股份两合公司 filed Critical 舍弗勒技术股份两合公司
Priority to CN202180101731.3A priority Critical patent/CN117940657A/zh
Priority to PCT/CN2021/129397 priority patent/WO2023077527A1/zh
Publication of WO2023077527A1 publication Critical patent/WO2023077527A1/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
    • 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 present application relates to the technical field of variable valve timing systems. More specifically, the present application relates to a phaser for a camshaft.
  • the engine's variable valve timing system includes a phase adjuster for adjusting the rotational phase of the camshaft relative to the crankshaft.
  • Figure 1 shows a possible phase regulator.
  • the phase regulator includes a stator 1', a rotor 2' and a control valve 3'.
  • the control valve 3' is installed in the rotor 2', one end of the control valve 3' is pressed against the end face of the rotor 2', and the other end is connected with the camshaft 4' through threads.
  • the various working parts of the control valve 3' are contained inside the housing 32' of the control valve 3'.
  • the oil inlet of the control valve 3' is equipped with a woven filter screen and a cast assembly 5' of a one-way valve to realize the functions of filtering impurities and one-way oil inlet.
  • the exterior of the control valve 3' is assembled with a housing 32'.
  • an overmolded sleeve 33' is used in the middle of the control valve 3'.
  • a casting assembly 5' of a woven filter screen and a one-way valve is used.
  • the workmanship of the housing 32', the sleeve 33' together with the screen and check valve assembly 5' is cumbersome and expensive.
  • the rotor 2' needs to support the camshaft 4', and the manufacturability of the rotor 2' is poor and the cost is high.
  • the object of the present application is to provide a cost-reduced phase adjuster for a camshaft.
  • the application provides a phase adjuster for a camshaft, which includes: a stator, which is in an annular structure; a rotor, which is accommodated in the stator and forms a first pressure chamber and a second pressure chamber with the stator, and the rotor has an inlet
  • the channel, the first pressure chamber and the second pressure chamber can be loaded with pressure fluid from the introduction channel to be able to adjust the rotor about the axis of rotation relative to the stator; the one-way valve; and the filter, wherein the one-way valve and the filter are interposed between the rotor and the camshaft.
  • the one-way valve has a sheet shape and includes: a fixed part having an opening provided corresponding to the introduction channel, and a movable part connected to the fixed part and provided corresponding to the opening, The movable part can be moved to a closed position and an open position, wherein in the closed position, the movable part is located in the opening so as to close the opening, and in the open position, the movable part faces away from the camshaft from the plane of the fixed part Tilt so that the opening opens.
  • the movable part is V-shaped.
  • the filter is sheet-shaped and includes an annular filtering area, and the filtering area is arranged corresponding to the movable part.
  • the filter area is configured as a mesh structure formed by an etching process.
  • the rotor, the one-way valve, the filter and the camshaft are connected by bolts, and one end of the bolt passes through the rotor, the one-way valve and the filter and enters the camshaft.
  • the phase adjuster further includes an adapter, which is interposed between the rotor and the camshaft, and the rotor, the adapter, and the camshaft are connected in an anti-rotational manner.
  • the rotor has a central hole penetrating in the direction of the rotation axis
  • the phase adjuster further includes a control valve, which is used to control the flow of pressurized fluid and includes: a piston sleeved in the central hole and capable of reciprocating movement in the central hole along the direction of the rotation axis; and an elastic member interposed between the piston and the adapter and capable of being extended or shortened with the reciprocating movement of the piston.
  • the peripheral wall of the piston is in direct contact with the inner wall of the central bore.
  • the piston is configured in a cylindrical shape, and the end of the piston facing the adapter has an inlet, and the peripheral wall of the piston is provided with an outlet, and the outlet is used to guide the pressure fluid out of the control valve, and the outer peripheral wall of the piston
  • a conduction groove surrounding the piston in the circumferential direction is formed radially inwardly, and when the piston moves to the first position relative to the rotor, the introduction channel communicates with the first pressure chamber through the conduction groove, and the second pressure The chamber communicates with the outlet through the inlet; and when the piston moves to the second position relative to the rotor, the inlet passage communicates with the second pressure chamber through the conduction groove, and the first pressure chamber communicates with the outlet. Pass.
  • the one-way valve and the filter are sandwiched between the rotor and the adapter without additional fixing methods, which simplifies the assembly of the one-way valve and the filter, thereby reducing production costs.
  • Figure 1 is a cross-sectional view of a possible phase adjuster.
  • FIGS. 2a and 2b are cross-sectional views of a phase adjuster according to an embodiment of the present application, respectively.
  • FIG. 3 is a partial cross-sectional view of a phaser according to an embodiment of the present application.
  • 4a and 4b are respectively exploded views of a phase adjuster according to an embodiment of the present application.
  • Fig. 5a is a perspective view of a rotor according to an embodiment of the present application
  • Fig. 5b and Fig. 5c are plan views of the rotor of Fig. 5a respectively
  • Fig. 5d is a cross-sectional view of the rotor of Fig. 5a.
  • Fig. 6a and Fig. 6b are respectively plan views of an adapter according to an embodiment of the present application.
  • 7a to 7c are respectively a perspective view, a plan view and a cross-sectional view of a one-way valve according to an embodiment of the present application.
  • Figure 8 is a plan view of a filter according to one embodiment of the present application.
  • 9a to 9c are cross-sectional views of a phase adjuster at a first position, a second position and a third position, respectively, according to an embodiment of the present application.
  • the phaser is mounted on the axial end of the camshaft of the engine.
  • Fig. 2 a and Fig. 2 b are respectively the sectional view of the phase adjuster according to one embodiment of the present application
  • Fig. 3 is the partial sectional view of the phase device according to one embodiment of the present application
  • Fig. 4 a and Fig. 4 b are respectively according to the sectional view of the present application
  • the phase adjuster includes a stator 1 , a rotor 2 and an adapter 3 .
  • the stator 1 can be connected to the crankshaft of the engine, has an annular structure and includes an inner space for receiving the rotor 2 .
  • the rotor 2 is accommodated in the stator 1, and is capable of reciprocating rotation relative to the stator 1 around the rotation axis X at a certain rotation angle, so as to be able to adjust the phase angle of the camshaft 4 relative to the crankshaft.
  • Fig. 5a is a perspective view of a rotor according to an embodiment of the present application
  • Fig. 5b and Fig. 5c are plan views of the rotor of Fig. 5a respectively
  • Fig. 5d is a cross-sectional view of the rotor of Fig. 5a.
  • the rotor 2 includes a cylindrical body 21 and blades 22 , and the blades 22 protrude radially outward from the outer peripheral wall of the body 21 .
  • a plurality of first pressure chambers and a plurality of second pressure chambers are formed between the stator 1 and the rotor 2 .
  • the center of the rotor 2 has a central hole 24 for receiving a control valve 9 (described below).
  • the rotor 2 also includes an introduction channel 23 through which pressurized fluid can enter a central bore 24 of the rotor 2 .
  • the introduction channel 23 includes a first channel 231 and a second channel 232 that intersect.
  • the first passage 231 extends inwardly in the direction of the rotation axis X from the end of the rotor 2 facing the camshaft 4
  • the second passage 232 extends radially inwardly.
  • the number of the introduction passages 23 is four, and are evenly spaced along the circumferential direction of the rotor 2 .
  • the first pressure chamber and the second pressure chamber can be supplied with pressurized fluid in order to be able to adjust the rotor 2 about the axis of rotation X relative to the stator 1 .
  • the body 21 of the rotor 2 also includes a first opening 25 and a second opening 26 penetrating radially.
  • the pressure fluid in the central hole 24 can flow into the first pressure chamber through the first opening 25, and the pressure fluid in the central hole 24 can flow into the first pressure chamber. It flows into the second pressure chamber via the second opening 26 .
  • the phase adjuster includes a check valve 7 and a filter 8 , and the check valve 7 and the filter 8 are interposed between the rotor 2 and the camshaft 4 .
  • the one-way valve and the filter are sandwiched between the rotor and the camshaft without additional fixing means, which simplifies the assembly of the one-way valve and the filter, thereby reducing production costs.
  • the adapter piece 3 is interposed between the rotor 2 and the camshaft 4, and the rotor 2, the adapter piece 3 and the camshaft 4 are connected in an anti-rotational manner.
  • the one-way valve 7 and the filter 8 can be interposed between the rotor 2 and the adapter 3 .
  • the one-way valve 7 and the filter 8 may be interposed between the adapter 3 and the camshaft 4 .
  • the rotor 2, the one-way valve 7, the filter 8, the adapter 3 and the camshaft 4 are arranged in sequence.
  • the rotor supports the camshaft, however the manufacturability of the rotor is poor.
  • an adapter is used between the rotor and the camshaft, and the manufacturing difficulty of the adapter is small, so the cost is reduced.
  • Fig. 6a and Fig. 6b are respectively plan views of an adapter according to an embodiment of the present application.
  • the adapter 3 includes a main body 30 and an annular flange 31 extending from the main body 30 toward the direction of the camshaft 4, and the first end of the camshaft 4 extends into the main body 30 and In the space defined by the annular flange 31, the inner side surface of the annular flange 31 abuts against the outer peripheral surface of the first end portion of the camshaft 4 radially inward, and the end surface of the first end portion of the annular flange 31 abuts against against the main body portion 30 to limit the movement of the camshaft 44 in the radial direction.
  • the main body portion 30 has a plate shape.
  • the adapter 3 includes a protrusion 32 protruding from the main body 30 in the direction of the rotation axis X toward the direction of the camshaft 4 and protruding into the interior of the camshaft 4 .
  • the protruding portion 32 has a cylindrical shape.
  • the main body defines an oil inlet 33 , and the oil inlet 33 is adjacent to the protrusion 32 .
  • the adapter 3 includes a plurality (for example, four) of oil inlets 33 , and the plurality of oil inlets 33 are arranged at intervals along the circumferential direction of the adapter 3 .
  • the bolt 5 is used to connect the rotor 2 , the adapter 3 and the camshaft 4 . Specifically, the threaded end of the bolt 5 passes through the rotor 2 and the adapter 3 and enters the camshaft 4 , and the head of the bolt 5 is pressed against the axial end surface of the rotor 2 .
  • the number of bolts 5 is four, and they are evenly spaced along the circumferential direction of the rotor 2 .
  • the phase adjuster also includes a first end cover 10 on the side facing the camshaft 4 and a second end cover 20 on the side facing away from the camshaft 4, and is used to interpose the rotor 2 and the adapter 3 therebetween.
  • a scroll spring is provided on the outer side of the first end cover 10 , and the scroll spring contracts when the rotor 2 rotates relative to the stator 1 in one direction. After the rotor 2 rotates to the set angle to achieve the optimal gas distribution phase, under the restoring force of the scroll spring, the rotor 2 can rotate in the opposite direction relative to the stator 1, so as to realize the reset.
  • the rotor 2 and the adapter 3 are also connected by pins 6 , and the pins 6 are interference fit with the rotor 2 and the adapter 3 respectively, so as to prevent the relative rotation of the rotor 2 and the adapter 3 .
  • the rotor 2 and the adapter 3 are fixed by pins 6 , the assembly method is simple, and no extra cost is incurred.
  • the number of pins 6 is two, and the two pins 6 are respectively arranged at opposite ends of the rotor 2 along the same radial direction.
  • One of the pins 6 (referred to as a support pin) passes through the rotor 2 and the first end cover 10 for supporting the scroll spring.
  • the one-way valve 7 is in the shape of a flat sheet and includes a fixed part 71 and a movable part 72 .
  • the fixing part 71 has an opening 711 provided corresponding to the introduction channel 23 .
  • the fixed portion 71 also has a first central hole 73 for a piston 91 (described below) of the control valve 9 to pass through.
  • the movable part 72 is connected to the fixed part 71 and arranged corresponding to the opening 711 .
  • the movable portion 72 is movable to a closed position and an open position.
  • the movable part 72 In the closed position, the movable part 72 is located in the opening 711 to close the opening 711 . In this position, pressurized fluid cannot flow into the rotor 2 through the opening 711 .
  • the movable part 72 In the open position, the movable part 72 tilts away from the plane of the fixed part 71 in a direction away from the camshaft 4 , so that pressure fluid can flow into the introduction channel 23 through the opening 711 .
  • the one-way valve 7 has a first side facing the camshaft 4, and the filter 8 abuts against the one-way valve 7 on the first side, so that the movable part 72 is restricted from tilting toward the direction of the camshaft 4, so that the one-way valve 7 realizes The function of one-way transmission of pressurized fluid.
  • the contour of the movable part 72 matches the shape of the opening 711 .
  • the shape of the movable part 72 is set to be substantially V-shaped.
  • the V-shaped shape not only maximizes the use of space, but also ensures that the oil can be opened and fed under a very small pressure.
  • the number of openings 711 and movable parts 72 matches the number of introduction channels 23 , for example, they are four.
  • the V-shaped movable part 72 includes a first extension part 721 and a second extension part 722 connected to each other, and an acute angle is formed between the two extension parts.
  • the free end of the first extension part 721 is connected with the fixing part 71
  • the second extension part 722 is arranged adjacent to the second central hole 82 and conforms to the contour of the second central hole 82 .
  • the introduction channel 23 of the rotor 2 is designed to adapt to the shape of the movable portion 72 , so that the movable portion 72 of the one-way valve 7 moves toward and away from the cam without hindrance.
  • the direction of axis 4 is tilted.
  • Figure 8 is a plan view of a filter according to one embodiment of the present application.
  • the filter 8 is in the shape of a flat sheet and includes an annular filter area 81, the oil inlet 33 of the adapter 3, the filter area 81, and the movable part 72 of the one-way valve 7 correspond to each other. set up.
  • the filter region 81 is configured as a mesh structure formed by an etching process.
  • the filter 8 is made of metal such as steel sheet.
  • the thickness of the one-way valve 7 and the filter 8 can be less than 0.5mm, which hardly occupies any space in the axial direction.
  • the filter 8 only needs to etch the filter holes in the filter area 81, which has high process flexibility and low cost.
  • the filter 8 is constructed as a complete metal, and its service life is better than that of the woven filter screen of the prior art.
  • the design of the annular structure is simple, and the corrosion area is as small as possible under the condition of ensuring the oil inlet, which saves the manufacturing cost.
  • the filter 8 has a second central hole 82 through which a piston 91 of the control valve 9 (described below) passes.
  • the rotor 2 has a central hole 24 penetrating in the direction of the axis X of rotation.
  • the phase adjuster also includes a control valve 9 for controlling the flow of pressurized fluid, and includes a piston 91 and an elastic member 92 .
  • the piston 91 is sheathed in the central hole 24 and can reciprocate along the direction of the rotation axis X in the central hole 24 .
  • the elastic member 92 is interposed between the piston 91 and the adapter 3 , and can be extended or shortened as the piston 91 reciprocates.
  • the elastic member 92 is a coil spring.
  • An electromagnet or other force-applying mechanism is provided on the side of the piston 91 away from the elastic member 92 , and the electromagnet can generate an axial magnetic force on the piston 91 .
  • the piston 91 can reciprocate under the joint action of the elastic force of the elastic member 92 and the magnetic force of the electromagnet.
  • a side of the adapter member 3 facing the elastic member 92 is recessed to form an annular receiving portion for accommodating the end of the elastic member 92 therein.
  • the outer peripheral wall of the piston 91 is in direct contact with the inner wall of the central hole 24 .
  • the control valve of the present application omits the casing and the sleeve, so the structure of the phase regulator is simple and the cost is reduced.
  • the piston 91 has a cylindrical design, and the end of the piston 91 facing the adapter part 3 has an inlet opening 911 .
  • An outlet 912 is provided on the peripheral wall of the piston 91 , and the outlet 912 is used to guide the pressure fluid out of the control valve 9 .
  • the outer peripheral wall of the piston 91 is partially recessed radially inward to form a conduction groove 913 surrounding the piston 91 in the circumferential direction.
  • FIGS 9a to 9c are cross-sectional views of a phase adjuster at a first position, a second position and a third position, respectively, according to an embodiment of the present application.
  • the introduction passage 23 communicates with the first pressure chamber through the conduction groove 913 and through the first opening 25, and the second The two pressure chambers communicate with the outlet port 912 through the inlet port 911 , so that the pressure fluid enters the first pressure chamber and the pressure fluid in the second pressure chamber flows out.
  • the introduction passage 23 communicates with the second pressure chamber through the conduction groove 913 and the second opening 26, and the first pressure chamber communicates with the outlet 912. , so that the pressure fluid enters the second pressure chamber, and the pressure fluid in the first pressure chamber flows out.
  • the introduction channel 23 is not connected to any one of the first pressure chamber and the second pressure chamber. In this case, the pressures in the first pressure chamber and in the second pressure chamber are equal.
  • the control valve 9 further includes a snap ring 93, which is arranged at the end of the piston 91 away from the elastic member 92, and acts as a limiter for limiting the reciprocating movement of the piston 91 along the direction of the rotation axis X.
  • Second channel 232 Second channel 232

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

Abstract

一种用于凸轮轴的相位调节器，其包括：定子，其呈环状结构；转子，其容纳在定子内并且与定子形成第一压力腔和第二压力腔，转子具有导入通道，第一压力腔和第二压力腔能够被加载来自导入通道的压力流体，以能够围绕旋转轴线相对于定子调节转子；单向阀和过滤器，其中，单向阀和过滤器夹设在转子与凸轮轴之间。单向阀和过滤器夹设在转子与转接件之间，不需要额外的固定方式，简化了单向阀和过滤器的装配，因此降低生产成本。

Description

用于凸轮轴的相位调节器 技术领域
本申请涉及可变气门正时系统的技术领域。更具体地，本申请涉及一种用于凸轮轴的相位调节器。
背景技术
发动机的可变气门正时系统包括相位调节器，相位调节器用于调节凸轮轴相对于曲轴的转动相位。图1示出了一种可能的相位调节器。如图1所示，相位调节器包括定子1'、转子2'和控制阀3'。控制阀3'装入到转子2'内，控制阀3'的一端压在转子2'的端面，并且另一端通过螺纹与凸轮轴4'连接。控制阀3'的各个工作零件包含在控制阀3'的壳体32'的内部。通过控制阀3'的活塞31'的行程，实现三位四通阀的作用。在控制阀3'的进油口安装有编织滤网和单向阀的浇铸组合件5'，实现过滤杂质和单向进油的作用。
为了与凸轮轴4'紧固连接，并且把零散的零件装配在一起，控制阀3'的外部用壳体32'装配。为了实现侧向分油，控制阀3'的中间使用了包覆成型的套筒33'。为了实现过滤杂质和单向进油，使用编织滤网和单向阀的浇铸组合件5'。然而，壳体32'、套筒33'连同滤网和单向阀的组合件5'的工艺繁琐并且价格昂贵。另外，需要转子2'支撑凸轮轴4'，转子2'的可制造性差，成本高。
发明内容
本申请的目的在于提供成本降低的用于凸轮轴的相位调节器。
本申请提供了一种用于凸轮轴的相位调节器，其包括：定子，其呈环状结构；转子，其容纳在定子内并且与定子形成第一压力腔和第二压力腔，转子具有导入通道，第一压力腔和第二压力腔能够被加载来自导入通 道的压力流体，以能够围绕旋转轴线相对于定子调节转子；单向阀；和过滤器，其中，单向阀和过滤器夹设在转子与凸轮轴之间。
根据本申请的实施例，单向阀呈片状并且包括：固定部，其具有开口，开口与导入通道相对应地设置，和可动部，其连接至固定部并且与开口相对应地设置，可动部能够移动到关闭位置和打开位置，其中，在关闭位置，可动部位于开口内，以使开口封闭，并且在打开位置，可动部从固定部所在的平面朝远离凸轮轴的方向翘起，以使开口打开。
根据本申请的实施例，可动部呈V形。
根据本申请的实施例，过滤器呈片状并且包括环形的过滤区域，过滤区域与可动部相对应地设置。
根据本申请的实施例，过滤区域构造为通过蚀刻工艺形成的网状结构。
根据本申请的实施例，转子、单向阀、过滤器与凸轮轴通过螺栓连接，螺栓的一端穿过转子、单向阀和过滤器并且进入凸轮轴中。
根据本申请的实施例，相位调节器还包括转接件，其夹设在转子与凸轮轴之间并且转子、转接件和凸轮轴三者之间抗相对转动地连接。
根据本申请的实施例，转子具有在旋转轴线的方向上贯穿的中央孔，相位调节器还包括控制阀，控制阀用于控制压力流体的流动并且包括：活塞，其套设于中央孔内并且能够在中央孔内沿旋转轴线的方向往复移动；和弹性件，其夹设在活塞与转接件之间并且能够随活塞的往复移动而伸长或缩短。
根据本申请的实施例，活塞的外周壁与中央孔的内壁直接接触。
根据本申请的实施例，活塞构造为筒状，活塞的面向转接件的端部具有导入口，活塞的周壁上设有导出口，导出口用于将压力流体导出控制阀，活塞的外周壁向径向内侧凹陷地形成在周向上环绕活塞的导通槽，在活塞相对于转子运动至第一位置的情况下，导入通道通过导通槽而与第一压力腔导通，并且第二压力腔通过导入口而与导出口导通；并且在活塞相对于转子运动到第二位置的情况下，导入通道通过导通槽而与第二压力腔导通，并且第一压力腔与导出口导通。
在相位调节器中，单向阀和过滤器夹设在转子与转接件之间，不需要额外的固定方式，简化了单向阀和过滤器的装配，因此降低生产成本。
附图说明
图1是一种可能的相位调节器的剖视图。
图2a和图2b分别是根据本申请的一个实施例的相位调节器的剖视图。
图3是根据本申请的一个实施例的相位器的局部剖视图。
图4a和图4b分别是根据本申请的一个实施例的相位调节器的分解图。
图5a是根据本申请的一个实施例的转子的立体图，图5b和图5c分别是图5a的转子的平面图，并且图5d是图5a的转子的剖视图。
图6a和图6b分别是根据本申请的一个实施例的转接件的平面图。
图7a至图7c分别是根据本申请的一个实施例的单向阀的立体图、平面图和剖视图。
图8是根据本申请的一个实施例的过滤器的平面图。
图9a至图9c分别是根据本申请的一个实施例的相位调节器处于第一位置、第二位置和第三位置处的剖视图。
具体实施方式
以下将结合附图描述根据本申请的具体实施方式。下面的详细描述和附图用于示例性地说明本申请的原理，本申请不限于所描述的优选实施例，本申请的保护范围由权利要求书限定。
相位调节器安装在发动机的凸轮轴的轴向端部上。图2a和图2b分别是根据本申请的一个实施例的相位调节器的剖视图，图3是根据本申请的一个实施例的相位器的局部剖视图，并且图4a和图4b分别是根据本申请的一个实施例的相位调节器的分解图。如图2a至图4b所示，相位调节器包括定子1、转子2和转接件3。定子1可以连接到发动机的曲轴，呈环状结构并且包括用于接收转子2的内部空间。转子2容纳在定子1内，并 且能够相对于定子1绕旋转轴线X以一定的旋转角度往复旋转，以能够调节凸轮轴4相对于曲轴的相位角。
图5a是根据本申请的一个实施例的转子的立体图，图5b和图5c分别是图5a的转子的平面图，并且图5d是图5a的转子的剖视图。如图5a至图5d所示，转子2包括筒状的本体21和叶片22，叶片22从本体21的外周壁向径向外侧突出。定子1与转子2之间形成多个第一压力腔和多个第二压力腔。转子2的中心具有中央孔24，以用于容纳控制阀9(如下所述)。转子2还包括导入通道23，压力流体能够通过导入通道23进入到转子2的中央孔24内。在一个示例中，导入通道23包括相交的第一通道231与第二通道232。第一通道231从转子2的面向凸轮轴4的端部处沿旋转轴线X的方向向内延伸，第二通道232沿径向方向向内侧延伸。在一个示例中，导入通道23的数量为四个，并且沿转子2的周向方向均匀地间隔设置。第一压力腔和第二压力腔能够被加载压力流体，以能够围绕旋转轴线X相对于定子1调节转子2。转子2的本体21还包括沿径向贯穿的第一开口25和第二开口26，中央孔24内的压力流体能够经由第一开口25流入第一压力腔，并且中央孔24内的压力流体能够经由第二开口26流入第二压力腔。
相位调节器包括单向阀7和过滤器8，并且单向阀7和过滤器8夹设在转子2与凸轮轴4之间。在本申请中，单向阀和过滤器夹设在转子与凸轮轴之间，不需要额外的固定方式，简化了单向阀和过滤器的装配，因此降低生产成本。
转接件3夹设在转子2与凸轮轴4之间，并且转子2、转接件3和凸轮轴4三者之间抗相对转动地连接。单向阀7和过滤器8可以夹设在转子2与转接件3之间。替代地，单向阀7和过滤器8可以夹设在转接件3与凸轮轴4之间。在一个示例中，转子2、单向阀7、过滤器8、转接件3和凸轮轴4依次布置。在现有技术中，转子支撑凸轮轴，然而转子的可制造性差。在本申请中，转子与凸轮轴之间使用了转接件，转接件的制造难度小，因此成本降低。
图6a和图6b分别是根据本申请的一个实施例的转接件的平面图。如 图6a和图6b所示，转接件3包括主体部30和从主体部30朝凸轮轴4所在的方向延伸的环形凸缘31，凸轮轴4的第一端部伸入主体部30和环形凸缘31界定的空间内，使得环形凸缘31的内侧表面沿径向向内抵靠凸轮轴4的第一端部的外周表面，并且环形凸缘31的第一端部的端表面抵靠主体部30，以限制凸轮轴44在径向方向上移动。例如，主体部30呈板状。转接件3包括突出部32，突出部32沿旋转轴线X的方向从主体部30朝凸轮轴4所在的方向突起并且伸入凸轮轴4的内部。例如，突出部32为圆柱状。主体部开设有进油口33，进油口33邻接突出部32。在一个示例中，转接件3包括多个(例如，四个)进油口33，多个进油口33沿转接件3的周向方向间隔布置。
在一个实施例中，螺栓5用于将转子2、转接件3和凸轮轴4三者相连接。具体而言，螺栓5的带有螺纹的一端穿过转子2和转接件3并且进入凸轮轴4中，并且螺栓5的头部压靠转子2的轴向端面。在一个示例中，螺栓5的数量为四个，并且沿转子2的周向方向均匀地间隔布置。
相位调节器还包括朝向凸轮轴4一侧上的第一端盖10和背离凸轮轴4一侧的第二端盖20，并且用于将转子2和转接件3夹设在其之间。第一端盖10的外侧设置有涡卷弹簧，涡卷弹簧在转子2相对于定子1沿一个方向旋转时收缩。当转子2旋转至设定角度实现最佳配气相位之后，在涡卷弹簧的回复力作用下，转子2能够相对于定子1沿反方向旋转，从而实现复位。
返回参照图4b，转子2和转接件3之间还通过销钉6连接，销钉6分别与转子2和转接件3过盈配合，以防止转子2和转接件3相对转动。转子2和转接件3之间通过销钉6固定，装配方式简单，不产生额外的成本。在一个示例中，销钉6的数量为两个，并且两个销钉6分别设置在转子2的沿同一径向方向的相对两端。其中一个销钉6(被称为支撑销)穿过转子2和第一端盖10，以用于支撑涡卷弹簧。
图7a至图7c分别是根据本申请的一个实施例的单向阀的立体图、平面图和剖视图。如图7a至图7c所示，单向阀7呈扁平的片状，并且包括固定部71和可动部72。固定部71具有开口711，开口711与导入通道23 相对应地设置。固定部71还具有第一中心孔73，以供控制阀9的活塞91(如下所述)穿过。可动部72连接至固定部71，并且与开口711相对应的设置。可动部72能够移动到关闭位置和打开位置。在关闭位置，可动部72位于开口711内，以封闭开口711。在该位置处，压力流体无法通过开口711流入到转子2内。在打开位置，可动部72从固定部71所在的平面朝背离凸轮轴4的方向翘起，使得压力流体能够通过开口711流入导入通道23。单向阀7具有面向凸轮轴4的第一侧，过滤器8在第一侧贴靠单向阀7，使得限制可动部72朝凸轮轴4所在的方向翘起，从而单向阀7实现单向传递压力流体的功能。可动部72的轮廓与开口711的形状相匹配。
在一个示例中，可动部72的形状设置为大致V形。V形的形状不仅最大化利用了空间，而且可以保证在极小的压力下就进行开启进油。开口711和可动部72的数量与导入通道23的数量相匹配，例如均为四个。V形可动部72包括彼此连接的第一延伸部721和第二延伸部722，两个延伸部之间呈锐角。第一延伸部721的自由端与固定部71相连接，并且第二延伸部722邻近第二中心孔82布置并且适应第二中心孔82的轮廓。
返回参照图3，在面向单向阀7的一侧，转子2的导入通道23设计为与可动部72的形状相适应，使得单向阀7的可动部72不受阻碍地朝背离凸轮轴4的方向翘起。
图8是根据本申请的一个实施例的过滤器的平面图。如图8所示，过滤器8呈扁平的片状并且包括环形的过滤区域81，转接件3的进油口33、过滤区域81、单向阀7的可动部72三者相对应地设置。过滤区域81构造为通过蚀刻工艺形成的网状结构。例如，过滤器8由金属(例如钢片)制成。单向阀7和过滤器8的厚度可以为0.5mm以下，几乎不占用轴向空间。过滤器8只需要在过滤区域81蚀刻滤孔即可，工艺灵活性大，成本低。过滤器8构造为完整的金属，寿命优于现有技术的编织滤网。环形结构设计简单，在保证进油的情况下，腐蚀区域尽量小，节省制造成本。过滤器8具有第二中心孔82，以供控制阀9的活塞91(如下所述)穿过。
返回参照图3，转子2具有在旋转轴线X的方向上贯穿的中央孔24。相位调节器还包括控制阀9，控制阀9用于控制压力流体的流动，并且包括活塞91和弹性件92。活塞91套设于中央孔24内，并且能够在中央孔24内沿旋转轴线X的方向往复移动。弹性件92夹设在活塞91与转接件3之间，并且能够随活塞91的往复移动而伸长或缩短。例如，弹性件92为螺旋弹簧。在活塞91的背离弹性件92的一侧设置有电磁铁或其他施力机构，电磁铁可以对活塞91产生轴向的磁力。活塞91可以在弹性件92的弹性力和电磁铁的磁力的共同作用下往复移动。转接件3的面向弹性件92的一侧凹陷地形成环形的容纳部，以将弹性件92的端部容纳在其中。
活塞91的外周壁与中央孔24的内壁直接接触。与现有技术相比，本申请的控制阀省略了壳体和套筒，因此相位调节器的结构简单，并且成本降低。
活塞91构造为筒状，并且活塞91的面向转接件3的端部具有导入口911。活塞91的周壁上设有导出口912，导出口912用于将压力流体导出控制阀9。活塞91的外周壁向径向内侧部分凹陷地形成在周向上环绕活塞91的导通槽913。
图9a至图9c分别是根据本申请的一个实施例的相位调节器处于第一位置、第二位置和第三位置处的剖视图。如图9a至图9c所示，在活塞91相对于转子2运动至第一位置的情况下，导入通道23通过导通槽913并且经由第一开口25而与第一压力腔导通，并且第二压力腔通过导入口911而与导出口912导通，使得压力流体进入第一压力腔，并且第二压力腔中的压力流体流出。在活塞91相对于转子2运动到第二位置的情况下，导入通道23通过导通槽913并且经由第二开口26而与第二压力腔导通，并且第一压力腔与导出口912导通，使得压力流体进入第二压力腔，并且第一压力腔中的压力流体流出。在活塞91相对于转子2运动到第三位置的情况下，导入通道23与第一压力腔和第二压力腔的任一者均不导通。在这种情况下，第一压力腔和第二压力腔中的压力相等。
控制阀9还包括卡簧93，卡簧93设置在活塞91的背离弹性件92的端部处，并且起到限位作用，用于限制活塞91沿旋转轴线X的方向的往 复移动。
如前所述，尽管说明中已经参考附图对本申请的示例性实施例进行了说明，但是本申请不限于上述具体实施方式，本申请的保护范围应当由权利要求书及其等同含义来限定。
附图标记列表
定子       1、1'
转子       2、2'
控制阀     9、3'
活塞       91、31'
壳体       32'
套筒       33'
凸轮轴     4、4'
组合件     5'
第一端盖   10
第二端盖   20
本体       21
叶片       22
导入通道   23
第一通道   231
第二通道   232
中央孔     24
第一开口   25
第二开口   26
旋转轴线   X
转接件     3
环形凸缘   31
突出部     32
进油口     33
螺栓       5
销钉       6
单向阀     7
固定部     71
开口       711
可动部     72
第一延伸部 721
第二延伸部 722
第一中心孔 73
过滤器     8
过滤区域   81
第二中心孔 82
导入口     911
导出口     912
导通槽     913
弹性件     92
卡簧       93

Claims (10)

  1. 一种用于凸轮轴(4)的相位调节器，其包括：
    定子(1)，其呈环状结构；
    转子(2)，其容纳在所述定子(1)内并且与所述定子(1)形成第一压力腔和第二压力腔，所述转子(2)具有导入通道(23)，所述第一压力腔和所述第二压力腔能够被加载来自所述导入通道(23)的压力流体，以能够围绕旋转轴线(X)相对于所述定子(1)调节所述转子(2)；
    单向阀(7)；和
    过滤器(8)，其中，所述单向阀(7)和所述过滤器(8)夹设在所述转子(2)与所述凸轮轴(4)之间。
  2. 根据权利要求1所述的相位调节器，其中，所述单向阀(7)呈片状并且包括：
    固定部(71)，其具有开口(711)，所述开口(711)与所述导入通道(23)相对应地设置，和
    可动部(72)，其连接至所述固定部(71)并且与所述开口(711)相对应地设置，所述可动部(72)能够移动到关闭位置和打开位置，其中，
    在所述关闭位置，所述可动部(72)位于所述开口(711)内，以使所述开口(711)封闭，并且在所述打开位置，所述可动部(72)从所述固定部(71)所在的平面朝远离所述凸轮轴(4)的方向翘起，以使所述开口(711)打开。
  3. 根据权利要求2所述的相位调节器，其中，
    所述可动部(72)呈V形。
  4. 根据权利要求1所述的相位调节器，其中，
    所述过滤器(8)呈片状并且包括环形的过滤区域(81)，所述过滤区域(81)与所述可动部(72)相对应地设置。
  5. 根据权利要求4所述的相位调节器，其中，
    所述过滤区域(81)构造为通过蚀刻工艺形成的网状结构。
  6. 根据权利要求1所述的相位调节器，其中，
    所述转子(2)、所述单向阀(7)、所述过滤器(8)与所述凸轮轴(4)通过螺栓(5)连接，所述螺栓(5)的一端穿过所述转子(2)、所述单向阀(7)和所述过滤器(8)并且进入所述凸轮轴(4)中。
  7. 根据权利要求1所述的相位调节器，还包括：
    转接件(3)，其夹设在所述转子(2)与所述凸轮轴(4)之间并且所述转子(2)、所述转接件(3)和所述凸轮轴(4)三者之间抗相对转动地连接。
  8. 根据权利要求7所述的相位调节器，其中，
    所述转子(2)具有在所述旋转轴线(X)的方向上贯穿的中央孔(24)，所述相位调节器还包括控制阀(9)，所述控制阀(9)用于控制所述压力流体的流动并且包括：
    活塞(91)，其套设于所述中央孔(24)内并且能够在所述中央孔(24)内沿所述旋转轴线(X)的方向往复移动；和
    弹性件(92)，其夹设在所述活塞(91)与所述转接件(3)之间并且能够随所述活塞(91)的往复移动而伸长或缩短。
  9. 根据权利要求8所述的相位调节器，其中，
    所述活塞(91)的外周壁与所述中央孔(24)的内壁直接接触。
  10. 根据权利要求8所述的相位调节器，其中，
    所述活塞(91)构造为筒状，所述活塞(91)的面向所述转接件(3)的端部具有导入口(911)，所述活塞(91)的周壁上设有导出口(912)，所述导出口(912)用于将所述压力流体导出所述控制阀(9)，所述活塞(91)的外周壁向径向内侧凹陷地形成在周向上环绕所述活塞(91)的导通槽(913)，
    在所述活塞(91)相对于所述转子(2)运动至第一位置的情况下，所述导入通道(23)通过所述导通槽(913)而与所述第一压力腔导通，并且所述第二压力腔通过所述导入口(911)而与所述导出口(912)导通；并且
    在所述活塞(91)相对于所述转子(2)运动到第二位置的情况下，所述导入通道(23)通过所述导通槽(913)而与所述第二压力腔导通，并且所述第一压力腔与所述导出口(912)导通。
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