WO2023019459A1 - 用于电桥驱动系统的通气阀、通气阀组件和电桥驱动系统 - Google Patents

用于电桥驱动系统的通气阀、通气阀组件和电桥驱动系统 Download PDF

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Publication number
WO2023019459A1
WO2023019459A1 PCT/CN2021/113190 CN2021113190W WO2023019459A1 WO 2023019459 A1 WO2023019459 A1 WO 2023019459A1 CN 2021113190 W CN2021113190 W CN 2021113190W WO 2023019459 A1 WO2023019459 A1 WO 2023019459A1
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Prior art keywords
chamber
opening
valve
section
channel
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PCT/CN2021/113190
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English (en)
French (fr)
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杜敏华
刘磊
徐君杰
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舍弗勒技术股份两合公司
杜敏华
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Application filed by 舍弗勒技术股份两合公司, 杜敏华 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2021/113190 priority Critical patent/WO2023019459A1/zh
Publication of WO2023019459A1 publication Critical patent/WO2023019459A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks

Definitions

  • the present application relates to the field of valve bodies, and in particular to a vent valve for a bridge drive system, a vent valve assembly and a bridge drive system including the vent valve assembly.
  • Fig. 1 and Fig. 2 show a possible eAxle driving system.
  • the bridge drive system includes a housing H, a first valve B1 and a second valve B2.
  • the housing H includes a first housing H1 for accommodating the transmission and a second housing H2 for accommodating the motor E.
  • the first housing H1 and the second housing H2 are separated by an inner wall Hw to form a first chamber C1 and a second chamber C1.
  • the upper part of the first housing H1 is provided with a first valve B1 communicating with the outside world and the first chamber C1
  • the upper part of the second housing H2 is provided with a second valve B2 communicating with the outside world and the second chamber C2.
  • the motor shaft S extends from the first chamber C1 to the second chamber C2, and an annular sealing device r is provided between the motor shaft S and the inner wall Hw.
  • the motor shaft S may be a motor output shaft connected to a rotor of the motor E, which may be a hollow shaft. Liquid such as engine oil L is contained in the first chamber C1, and this part of engine oil L is not expected to enter the second chamber C2.
  • the sealing device r can prevent the engine oil L from flowing from the first chamber C1 into the second chamber C2.
  • the air pressure in the second chamber C2 When the air pressure in the second chamber C2 is greater than the air pressure in the first chamber C1 (for example, when the motor speed changes rapidly, or when the motor temperature is high, the second chamber C2 air pressure will rise), the air will squeeze the radial inner lip of the sealing device r along the direction from the second chamber C2 to the first chamber C1, and from the radial inner to the radial outer, thereby destroying Sealing of the lip of the sealing device r. This causes the risk of oil L leaking from the first chamber C1 to the second chamber C2.
  • the first valve B1 and the second valve B2 can adjust the air pressure in the first chamber C1 and the second chamber C2, so as to keep the air pressure in the first chamber C1 and the second chamber C2 as equal as possible.
  • the second valve B2 can only be arranged at the end of the second housing H2 away from the sealing device r, which will make the second valve B2 have a greater impact on the second housing H2.
  • the air pressure adjustment in the second chamber C2 is not timely enough, especially the air pressure adjustment near the sealing device r is not timely enough.
  • the second valve B2 communicates with the outside of the housing H, which also increases the risk of external water and dust entering the second chamber C2. The entry of water and dust will have a bad effect on the motor E.
  • the purpose of the present application is to overcome or at least alleviate the shortcomings of the above-mentioned prior art, and to provide a breather valve for a bridge drive system, a breather valve assembly and a bridge drive system.
  • vent valve for an bridge drive system having a first chamber for housing a transmission and a second chamber for housing an electric motor, the vent valve for controlling fluid flow in the The conduction between the first chamber and the second chamber, wherein,
  • the ventilation valve includes a valve body, a channel for communicating with the first chamber and the second chamber is formed inside the valve body, and the two ends of the channel are respectively formed as a first opening and a second opening , the first opening is used to connect with the first chamber, the second opening is used to connect with the second chamber,
  • the channel includes a reduced diameter region formed as a tapered taper toward the first opening.
  • the diameter reducing area includes a first section and a second section adjacent in the flow direction of the channel, and the first section is closer to the channel than the second section.
  • the area of the cross section of the first section perpendicular to the flow direction increases by less than the An increase in the area of the cross-section of the second section perpendicular to the flow direction.
  • the first opening is located at one end of the first section.
  • the channel further includes a straight zone, and in the flow direction of the channel, the area of the cross section of the straight zone perpendicular to the flow direction remains constant,
  • the straight zone is connected to the end of the variable diameter zone facing the second opening.
  • the valve body includes a main body and a connecting portion, the outer diameter of the connecting portion is smaller than the outer diameter of the main body, and the connecting portion is used for inserting into a tubular mounting seat to fix the ventilation valve ,
  • the diameter reducing area is formed on the main body.
  • the ventilation valve further includes a filter membrane, the filter membrane is arranged in the channel, and the filter membrane is a waterproof and gas-permeable membrane.
  • the ventilation valve further includes a filter membrane, and the filter membrane is arranged in the channel,
  • the filter membrane includes a first face and a second face, the first face faces the first opening, the second face faces the second opening,
  • the filter membrane allows air to flow from the side of the first surface to the side of the second surface, and also allows air to flow from the side of the second surface to the side of the first surface,
  • the filter membrane allows liquid to flow from the side where the second surface is located to the side where the first surface is located, and can prevent liquid from flowing from the side where the first surface is located to the side where the second surface is located.
  • breather valve assembly for an electric bridge drive system comprising a mount and a breather valve according to the present application
  • the mounting base is tubular and includes a first port and a second port, and the second opening of the ventilation valve is connected to the first port.
  • the mount includes a first part and a second part, and the axis of the first part is not collinear with the axis of the second part.
  • bridge drive system which includes a housing and a breather valve assembly according to the present application,
  • the housing is formed with the first chamber and the second chamber
  • the installation position of the breather valve assembly in the housing is above the liquid level of the second chamber
  • the first opening of the vent valve of the vent valve assembly opens to the first chamber
  • a second port of the mount of the vent valve assembly is open to the second chamber.
  • the vent valve is housed within the second chamber.
  • the first chamber and the second chamber are separated by an inner wall of the housing, and the mount passes through or is mounted to the inner wall.
  • the first opening is arranged vertically downward.
  • the first chamber is used to accommodate the transmission
  • the second chamber is used to accommodate the motor
  • the electric bridge drive system further includes a shaft member disposed through the inner wall, a sealing device is disposed between the shaft member and the inner wall, and the breather valve assembly is disposed above the sealing device.
  • the bridge drive system further includes an external valve mounted to the housing, the external valve allowing air to enter or exit the second chamber.
  • the ventilation valve according to the present application is simple in structure and can control the flow of gas and liquid on both sides of the valve.
  • the breather valve assembly according to the present application is simple in structure.
  • the vent valve assembly is easily disassembled for maintenance.
  • the air pressure in the bridge driving system according to the present application can be adjusted in time, and the reliability of the bridge driving system is high.
  • FIG. 1 is a schematic diagram of a partial structure of a possible bridge drive system.
  • FIG. 2 is a schematic diagram showing in particular the sealing device in FIG. 1 .
  • Fig. 3 is a schematic diagram of an application to a bridge driving system according to an embodiment of the present application.
  • FIG. 4 is a partially enlarged schematic diagram of FIG. 3 .
  • FIG. 5 is a schematic diagram of a vent valve according to an embodiment of the present application.
  • H shell H1 first shell; H2 second shell; Hw inner wall; H0 opening;
  • valve body 100 channel; 100a first opening; 100b second opening; 11 main body; 12 connecting part; 101 first section; 102 second section; 103 third section; Section; 20 filter membrane; 20a first side; 20b second side;
  • A represents the axial direction of the bridge drive system, and the axial direction A is consistent with the axial direction of the motor E in the bridge drive system;
  • R represents the radial direction of the bridge drive system, and the radial direction R It is consistent with the radial direction of the motor E in the bridge drive system.
  • the bridge drive system includes a housing H, a breather valve assembly, a motor shaft S and a sealing device r.
  • the housing H includes a first shell H1 and a second shell H2 between which an inner wall Hw is formed to define a first chamber C1 and a second chamber C2 . It should be understood that the first shell H1 and the second shell H2 can be made separately or integrally.
  • the first chamber C1 is used to accommodate the transmission, and the second chamber C2 is used to accommodate the electric motor E. Liquid such as engine oil L is accommodated in the first chamber C1.
  • the motor shaft S extends from the second chamber C2 to the first chamber C1, and an annular sealing device r is provided between the motor shaft S and the inner wall Hw.
  • the breather valve assembly is arranged above the sealing device r and fixed to the inner wall Hw.
  • the breather valve assembly includes the breather valve B and the mounting seat T.
  • An opening H0 communicating with the first chamber C1 and the second chamber C2 is formed on the inner wall Hw.
  • the mount T has a tubular shape and includes a first port Ta and a second port Tb.
  • the second port Tb is connected to the opening H0, and the first port Ta is connected to the vent valve B.
  • a portion of the mounting seat T close to the second port Tb is inserted into the opening H0.
  • the installation seat T can also be formed as a part of the housing H. As shown in FIG.
  • the mount T includes a first part T1 and a second part T2, the first port Ta is located at the end of the first part T1, and the second port Tb is located at the end of the second part T2.
  • the axis of the first portion T1 is not collinear with the axis of the second portion T2.
  • the axis of the first part T1 extends substantially along the vertical direction
  • the axis of the second part T2 extends substantially along the horizontal direction, so that the first port Ta is substantially vertically downwardly opened, and the second port Tb is substantially laterally open.
  • the breather valve B includes a valve body 10 and a filter membrane 20 .
  • a channel 100 is formed inside the valve body 10 for fluid to pass through. Both ends of the channel 100 are formed as a first opening 100a and a second opening 100b.
  • the first opening 100a is open to the first chamber C1, and the second opening 100b is connected to the first port Ta.
  • the valve body 10 includes a main body 11 and a connecting portion 12 , the outer diameter of the connecting portion 12 is smaller than the outer diameter of the main body 11 .
  • the connecting portion 12 protrudes into the first portion T1 of the mount T through the first port Ta.
  • the connecting portion 12 is in interference fit with the mounting seat T. As shown in FIG. 1
  • the end of the connecting portion 12 close to the second opening 100b is formed into a substantially tapered shape, the closer to the second opening 100b, the smaller the outer diameter of the end of the connecting portion 12, which makes the connecting portion 12 easy to be inserted
  • the mounting seat T is not easy to fall off from the mounting seat T.
  • the axis of the first part T1 extends substantially in the vertical direction, and the valve body 10 is partially nested in the first part T1
  • the axis of the passage 100 extends substantially in the vertical direction, which makes it difficult for engine oil L or other foreign matter to flow from the passage.
  • the lower end (first opening 100a) of 100 enters the channel 100, and even if engine oil L or other foreign matter enters the channel 100, it is easy to leave the channel 100 from the first opening 100a under the force of gravity.
  • the filter membrane 20 is arranged in the channel 100, and the filter membrane 20 allows air to flow through in two directions, but only allows liquid to flow through in one direction.
  • the first surface 20a of the filter membrane 20 faces the first opening 100a
  • the second surface 20b of the filter membrane 20 faces the second opening 100b.
  • the dotted line arrow in Fig. 4 has shown the direction that the air flows through the filter membrane 20, that is, the air can flow from the side where the first surface 20a is located to the side where the second surface 20b is located, and can also flow from the side where the second surface 20b is located to the first surface.
  • FIG 4 shows the direction in which the liquid (such as engine oil L) flows through the filter membrane 20, that is, the liquid can flow from the side where the second surface 20b is located to the side where the first surface 20a is located, but cannot flow from the side where the second surface 20b is located.
  • the side where one side 20a is located flows to the side where the second side 20b is located.
  • Gore Gore
  • the air pressure in the first chamber C1 and the second chamber C2 is different, the air can be adjusted spontaneously between the first chamber C1 and the second chamber C2, so that the first chamber C1 and the second chamber C2 The air pressures in chamber C2 are approximately equalized.
  • the engine oil L does not pass through the filter membrane 20 from the first chamber C1 and finally flows to the second chamber C2.
  • the channel 100 in the flow direction of fluid flowing through the channel 100 (sometimes referred to simply as the flow direction of the channel 100), from the first opening 100a to the second opening 100b, the channel 100 includes first sections in turn 101 , the second section 102 , the third section 103 and the fourth section 104 .
  • the first section 101 and the second section 102 are connected to form a diameter reducing area.
  • the first section 101 , the second section 102 or the diameter reduction area may be formed in a tapered shape that tapers toward the first opening 100a.
  • the closer to the first opening 100 a the smaller the cross-sectional area of the variable diameter region perpendicular to the flow direction.
  • this makes the liquid entering the variable diameter area flow back to the liquid storage area of the first chamber C1 along the wall of the variable diameter area under the action of gravity; on the other hand, this can prevent the liquid from being sucked up into the channel 100.
  • the steepness of the inner wall of the first section 101 is greater than the steepness of the inner wall of the second section 102, or in other words, along the flow direction of the channel 100, from the first opening 100a to the second opening 100b, every Moving a unit length, the increase of the area of the cross section of the first section 101 perpendicular to the flow direction is smaller than the increase of the area of the cross section of the second section 102 perpendicular to the flow direction. This prevents liquid from being sucked up into the channel 100, and liquid that accidentally enters the second section 102 also tends to flow back into the first section 101 and eventually back into the reservoir.
  • the third section 103 is a straight zone, that is, along the flow direction of the channel 100 , the cross-sectional area of the third section 103 perpendicular to the flow direction remains unchanged.
  • the filter membrane 20 is arranged in the third section 103 .
  • the fourth section 104 is another straight section.
  • the fourth section 104 is generally located within the connecting portion 12 .
  • the area of the cross section of the fourth section 104 is smaller than the area of the cross section of the third section 103 .
  • the bridge drive system further includes an external valve Bg disposed on the second housing H2.
  • the external valve Bg communicates the first chamber C1 and the external space of the housing H.
  • the external valve Bg can allow air to pass bidirectionally, that is, when the air pressure in the first chamber C1 is too high, the air can flow from the first chamber C1 to the outside of the housing H through the external valve Bg; in the first chamber C1 When the internal air pressure is too low, air can flow into the first chamber C1 from the outside through the external valve Bg.
  • the external valve Bg does not allow liquid to pass through.
  • vent valve B and the external valve Bg enables the air pressure in the first chamber C1 and the second chamber C2 to be balanced quickly
  • Vent valve B is set above the sealing device r, with a short distance from the sealing device r, and can adjust the pressure difference between the first chamber C1 and the second chamber C2 in time, especially near the sealing device r The pressure difference prevents leakage of the sealing device r due to pressure imbalance on both sides, and prevents engine oil from entering the second chamber C2 where the motor E is located.
  • vent valve B is detachably connected to the installation seat T, which facilitates the maintenance, maintenance and replacement of the vent valve B.
  • the axis of the first part T1 and the axis of the second part T2 of the mounting base T may not be perpendicular to each other, for example, the axis of the first part T1 may also form a certain angle with the vertical direction.
  • the channel 100 is not limited to include four parts: the first section 101 , the second section 102 , the third section 103 and the fourth section 104 .
  • the ventilation valve B and the installation seat T are formed as a split structure to simplify the manufacturing process and facilitate the maintenance of the ventilation valve B, the ventilation valve B and the installation seat T can also be formed as one body, or a part of the ventilation valve B The structure may be integrally formed with the mount T.
  • the sealing device r is not limited to be installed between the inner wall Hw and the motor shaft S, the motor shaft S may be a shaft member of other forms or uses, and the shaft member may have one or more of the following functions, for example : The torque of the motor is transmitted to the transmission, the torque of the transmission is transmitted to the motor, the torque of the transmission is output, and the torque is input to the transmission.
  • the filter membrane 20 is not limited to the cases described above, and the filter membrane 20 may also be a waterproof and gas-permeable membrane.
  • the waterproof and breathable film may include, but is not limited to, PU (polyurethane) film, TPU (thermoplastic polyurethane elastomer) film, EPTFE (polytetrafluoroethylene) film.
  • the waterproof and breathable membrane can be a composite membrane made of multi-layer materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

一种用于电桥驱动系统的通气阀，所述通气阀用于控制流体在第一腔室(C1)和第二腔室(C2)之间的导通。所述通气阀包括阀身(10)，所述阀身(10)的内部形成有用于连通所述第一腔室(C1)和所述第二腔室(C2)的通道(100)，所述通道(100)的两端分别形成为第一开口(100a)和第二开口(100b)，所述第一开口(100a)用于与所述第一腔室(C1)连接，所述第二开口(100b)用于与所述第二腔室(C2)连接，所述通道(100)包括变径区，所述变径区形成为朝向所述第一开口(100a)渐缩的锥形。还提供一种用于电桥驱动系统的通气阀组件和电桥驱动系统。

Description

用于电桥驱动系统的通气阀、通气阀组件和电桥驱动系统 技术领域
本申请涉及阀体领域，且特别地涉及一种用于电桥驱动系统的通气阀、通气阀组件和包括该通气阀组件的电桥驱动系统。
背景技术
以电动车辆的电桥(eAxle)驱动系统为例，图1和图2示出了一种可能的电桥驱动系统。该电桥驱动系统包括壳体H、第一阀B1和第二阀B2。
壳体H包括用于容纳变速器的第一壳H1和用于容纳电机E的第二壳H2，第一壳H1和第二壳H2之间由内壁Hw间隔开而形成第一腔室C1和第二腔室C2。第一壳H1的上部设有连通外界和第一腔室C1的第一阀B1，第二壳H2的上部设有连通外界和第二腔室C2的第二阀B2。
电机轴S从第一腔室C1延伸到第二腔室C2，在电机轴S和内壁Hw之间设有环形的密封装置r。这里，示意性地，电机轴S可以是连接到电机E的转子的电机输出轴，该电机输出轴可以是空心轴。第一腔室C1内容纳有例如机油L的液体，而这部分机油L是不期望进入第二腔室C2的。在第一腔室C1和第二腔室C2内的气压大致相等的情况下，密封装置r能避免机油L从第一腔室C1流入第二腔室C2。
在第一腔室C1内的气压大于第二腔室C2内的气压的情况下，空气有从第一腔室C1向第二腔室C2流动的趋势，在图2所示的密封装置构型中，这会使密封装置r在径向内侧将电机轴S压紧，而不容易发生机油的泄漏。
在第二腔室C2内的气压大于第一腔室C1内的气压的情况下(例如，在电机转速变化较快的情况下，或在电机温度较高的情况下，第二腔室C2的气压会升高)，空气会将密封装置r的径向内侧的唇部沿着从第二腔室C2指向第 一腔室C1、并从径向内侧指向径向外侧的方向挤压，从而破坏密封装置r的唇部的密封。这导致机油L有从第一腔室C1向第二腔室C2泄漏的隐患。
第一阀B1和第二阀B2能调节第一腔室C1和第二腔室C2内的气压，使第一腔室C1和第二腔室C2内的气压尽量保持相等。
然而，由于第二壳H2的上部设有功率集成单元P(例如，PEU)，第二阀B2只能设置在第二壳H2的远离密封装置r的一端，这会使得第二阀B2对第二腔室C2内的气压调节不够及时，特别是对密封装置r附近的气压调节不够及时。此外，第二阀B2与壳体H的外部连通，也增加了外部的例如水和灰尘等进入第二腔室C2的风险，水和灰尘等的进入会对电机E产生不良影响。
发明内容
本申请的目的在于克服或至少减轻上述现有技术存在的不足，提供一种用于电桥驱动系统的通气阀、通气阀组件和电桥驱动系统。
提供一种用于电桥驱动系统的通气阀，所述电桥驱动系统具有用于容纳变速器的第一腔室和用于容纳电机的第二腔室，所述通气阀用于控制流体在所述第一腔室和所述第二腔室之间的导通，其中，
所述通气阀包括阀身，所述阀身的内部形成有用于连通所述第一腔室和所述第二腔室的通道，所述通道的两端分别形成为第一开口和第二开口，所述第一开口用于与所述第一腔室连接，所述第二开口用于与所述第二腔室连接，
所述通道包括变径区，所述变径区形成为朝向所述第一开口渐缩的锥形。
在至少一个实施方式中，所述变径区包括在所述通道的流通方向上相邻的第一区段和第二区段，所述第一区段比所述第二区段更靠近所述第一开 口，
沿着所述通道的流通方向，从所述第一开口向所述第二开口每移动单位长度，所述第一区段的垂直于所述流通方向的横截面的面积的增大量小于所述第二区段的垂直于所述流通方向的横截面的面积的增大量。
在至少一个实施方式中，所述第一开口位于所述第一区段的一个端部。
在至少一个实施方式中，所述通道还包括直筒区，在所述通道的流通方向上，所述直筒区的垂直于所述流通方向的横截面的面积保持不变，
所述直筒区与所述变径区的朝向所述第二开口的端部相连。
在至少一个实施方式中，所述阀身包括主体和连接部，所述连接部的外径小于所述主体的外径，所述连接部用于嵌入管状的安装座内而固定所述通气阀，
所述变径区形成于所述主体。
在至少一个实施方式中，所述通气阀还包括过滤膜，所述过滤膜设置在所述通道内，所述过滤膜是防水透气膜。
在至少一个实施方式中，所述通气阀还包括过滤膜，所述过滤膜设置在所述通道内，
所述过滤膜包括第一面和第二面，所述第一面朝向所述第一开口，所述第二面朝向所述第二开口，
所述过滤膜允许空气从所述第一面所在侧流向所述第二面所在侧，也允许空气从所述第二面所在侧流向所述第一面所在侧，
所述过滤膜允许液体从所述第二面所在侧流向所述第一面所在侧，且能阻止液体从所述第一面所在侧流向所述第二面所在侧。
还提供一种用于电桥驱动系统的通气阀组件，其包括安装座和根据本申请的通气阀，
所述安装座呈管状并包括第一端口和第二端口，所述通气阀的所述第二开口与所述第一端口相连。
在至少一个实施方式中，所述安装座包括第一部分和第二部分，所述第一部分的轴线与所述第二部分的轴线不共线。
再提供一种电桥驱动系统，其包括壳体和根据本申请的通气阀组件，
所述壳体形成有所述第一腔室和所述第二腔室，
所述通气阀组件在所述壳体内的安装位置位于所述第二腔室的液面的上方，
所述通气阀组件的所述通气阀的所述第一开口向所述第一腔室开放，
所述通气阀组件的所述安装座的第二端口向所述第二腔室开放。
在至少一个实施方式中，所述通气阀被容纳于所述第二腔室内。
在至少一个实施方式中，所述第一腔室和所述第二腔室由所述壳体的内壁间隔开，所述安装座穿过或安装到所述内壁。
在至少一个实施方式中，所述第一开口竖直向下地设置。
在至少一个实施方式中，所述第一腔室用于容纳变速器，所述第二腔室用于容纳电机，
所述电桥驱动系统还包括穿过所述内壁设置的轴构件，在所述轴构件与所述内壁之间设置有密封装置，所述通气阀组件设置在所述密封装置的上方。
在至少一个实施方式中，所述电桥驱动系统还包括安装于所述壳体的外部阀，所述外部阀允许空气进入或流出所述第二腔室。
根据本申请的通气阀结构简单且能控制气体和液体在阀两侧的流动。根据本申请的通气阀组件结构简单。
在至少一些实施方式中，通气阀组件便于拆装维护。
在至少一些实施方式中，根据本申请的电桥驱动系统内的气压能及时被调整，电桥驱动系统的可靠性高。
附图说明
图1是一种可能的电桥驱动系统的部分结构的示意图。
图2是将图1中的密封装置特别示出的示意图。
图3是根据本申请的一个实施方式的应用于电桥驱动系统的示意图。
图4是图3的局部放大的示意图。
图5是根据本申请的一个实施方式的通气阀的示意图。
附图标记说明
H壳体；H1第一壳；H2第二壳；Hw内壁；H0开口；
C1第一腔室；C2第二腔室；S电机轴；B1第一阀；B2第二阀；Bg外部阀；P功率集成单元；
r密封装置；T安装座；T1第一部分；T2第二部分；
B通气阀；10阀身；100通道；100a第一开口；100b第二开口；11主体；12连接部；101第一区段；102第二区段；103第三区段；104第四区段；20过滤膜；20a第一面；20b第二面；
A轴向；R径向。
具体实施方式
下面参照附图描述本申请的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本申请，而不用于穷举本申请的所有可行的方式，也不用于限制本申请的范围。
除非特别说明，参照图3，A表示电桥驱动系统的轴向，该轴向A与电桥驱动系统中的电机E的轴向一致；R表示电桥驱动系统的径向，该径向R与电 桥驱动系统中的电机E的径向一致。
参照图3至图5，以在电桥驱动系统中的应用为例，介绍根据本申请的通气阀、通气阀组件和电桥驱动系统。
根据本申请的电桥驱动系统包括壳体H、通气阀组件、电机轴S和密封装置r。
参照图3，壳体H包括第一壳H1和第二壳H2，第一壳H1和第二壳H2之间形成有内壁Hw，从而限定出第一腔室C1和第二腔室C2。应当理解，第一壳H1和第二壳H2可以分体制作也可以一体地制作。
第一腔室C1用于容纳变速器，第二腔室C2用于容纳电机E。第一腔室C1内容纳有例如机油L的液体。
电机轴S从第二腔室C2伸至第一腔室C1，在电机轴S和内壁Hw之间设有环形的密封装置r。
通气阀组件设置在密封装置r的上方，并固定于内壁Hw。通气阀组件包括通气阀B和安装座T。
内壁Hw上形成有连通第一腔室C1和第二腔室C2的开口H0。
参照图4，安装座T呈管状并包括第一端口Ta和第二端口Tb。第二端口Tb与开口H0相连，第一端口Ta与通气阀B相连。
可选地，安装座T的靠近第二端口Tb的部分插入开口H0内。
可选地，在其它可能的实施方式中，安装座T也可以形成为壳体H的一部分。
可选地，安装座T包括第一部分T1和第二部分T2，第一端口Ta位于第一部分T1的端部，第二端口Tb位于第二部分T2的端部。第一部分T1的轴线与第二部分T2的轴线不共线。可选地，第一部分T1的轴线大致沿竖直方向延伸，第二部分T2的轴线大致沿水平方向延伸，使得第一端口Ta大致竖直向下开放、第二端口Tb大致向侧方开放。
通气阀B包括阀身10和过滤膜20。
阀身10的内部形成有供流体通过的通道100。通道100的两端形成为第一开口100a和第二开口100b。第一开口100a向第一腔室C1开放，第二开口100b与第一端口Ta相连。
可选地，阀身10包括主体11和连接部12，连接部12的外径小于主体11的外径。连接部12经由第一端口Ta伸入安装座T的第一部分T1内。
可选地，连接部12与安装座T过盈配合。
可选地，连接部12的靠近第二开口100b的端部形成为大致锥形，越靠近第二开口100b，连接部12的该端部的外径越小，这使得连接部12容易被插入安装座T、且不容易从安装座T脱落。
应当理解，虽然这里使用了“外径”的表述，但是主体11和连接部12整体上不必须为圆筒形。
由于第一部分T1的轴线大致沿竖直方向延伸，而阀身10部分地嵌套于第一部分T1内，因此通道100的轴线大致沿竖直方向延伸，这使得机油L或其它异物不容易从通道100的下端(第一开口100a)进入通道100，且即使机油L或其它异物进入通道100，也容易在重力作用下从第一开口100a离开通道100。
过滤膜20设置在通道100内，过滤膜20能使空气双向地流过，但只允许液体单向地流过。过滤膜20的第一面20a朝向第一开口100a，过滤膜20的第二面20b朝向第二开口100b。图4中的点划线箭头示出了空气流过过滤膜20的方向，即空气能从第一面20a所在侧流向第二面20b所在侧，也能从第二面20b所在侧流向第一面20a所在侧；图4中的虚线箭头示出了液体(例如机油L)流过过滤膜20的方向，即液体能从第二面20b所在侧流向第一面20a所在侧，但不能从第一面20a所在侧流向第二面20b所在侧。例如，可以使用戈尔 (GORE)公司的相关技术实现上述流通功能，本申请对此不作赘述。
于是，当第一腔室C1和第二腔室C2内的气压形成差异时，空气能在第一腔室C1和第二腔室C2之间自发地调节，使第一腔室C1和第二腔室C2内的气压达到大致相等。在这个过程中，机油L不会从第一腔室C1穿过过滤膜20并最终流至第二腔室C2。
参照图5，可选地，在流体流过通道100的流通方向(有时，简称为通道100的流通方向)上，从第一开口100a向第二开口100b去，通道100依次包括第一区段101、第二区段102、第三区段103和第四区段104。
第一区段101和第二区段102相连并形成为变径区。第一区段101、第二区段102或变径区可以形成为朝向第一开口100a渐缩的锥形。换言之，在通道100的流通方向上，越靠近第一开口100a、变径区的垂直于所述流通方向的横截面的面积越小。一方面，这使得进入变径区的液体会在重力的作用下顺着变径区的壁流回第一腔室C1的储液区；另一方面，这可以防止液体往上倒吸进入通道100。
可选地，第一区段101的内壁的陡峭程度大于第二区段102的内壁的陡峭程度，或者说，沿着通道100的流通方向，从第一开口100a向第二开口100b去，每移动单位长度，第一区段101的垂直于流通方向的横截面的面积的增大量小于第二区段102的垂直于流通方向的横截面的面积的增大量。这可以防止液体往上倒吸进入通道100，并且，意外进入第二区段102的液体还容易流回第一区段101并最终流回储液区。
可选地，第三区段103为直筒区，即沿着通道100的流通方向，第三区段103的垂直于流通方向的横截面的面积保持不变。过滤膜20设置在第三区段103内。
可选地，第四区段104为另一个直筒区。第四区段104大致位于连接部12 内。第四区段104的横截面的面积小于第三区段103的横截面的面积。
回到图3，可选地，电桥驱动系统还包括设置在第二壳H2的外部阀Bg。外部阀Bg连通第一腔室C1和壳体H的外部空间。外部阀Bg能够使空气双向地通过，即，在第一腔室C1内气压过大时，空气能从第一腔室C1经过外部阀Bg流至壳体H的外部；在第一腔室C1内气压过小时，空气能从外部经过外部阀Bg流入第一腔室C1。可选地，外部阀Bg不允许液体通过。
通气阀B和外部阀Bg的配合使用，使得第一腔室C1和第二腔室C2内的气压能较快地平衡
下面简单说明本申请的上述实施方式的部分有益效果。
(i)通气阀B设置在密封装置r的上方，与密封装置r间隔的距离短，能及时调整第一腔室C1和第二腔室C2之间的压力差，特别是密封装置r附近的压力差，避免密封装置r由于两侧的压力不平衡而发生泄漏、避免机油进入电机E所在的第二腔室C2。
(ii)通气阀B的竖直安装姿态和内部的多段变径结构，使得液体不容易从下端被吸入通气阀B内，且意外进入通气阀B内的液体也容易从通气阀B中排出，液体不容易通过通气阀B从第一腔室C1进入第二腔室C2。
(iii)可选地，通气阀B与安装座T能拆装地连接，方便通气阀B的维护、保养和更换。
应当理解，上述实施方式仅是示例性的，不用于限制本申请。本领域技术人员可以在本申请的教导下对上述实施方式做出各种变型和改变，而不脱离本申请的范围。例如，
(i)安装座T的第一部分T1的轴线和第二部分T2的轴线可以不是彼此垂直的，例如，第一部分T1的轴线也可以与竖直方向形成一定的夹角。
(ii)通道100可以不限于是包括第一区段101、第二区段102、第三区段 103和第四区段104四个部分。
(iii)虽然通气阀B和安装座T形成为分体结构能简化制作工艺，并且方便通气阀B的维护保养，但通气阀B与安装座T也可以形成为一体，或者通气阀B的部分结构可以和安装座T一体地形成。
(iv)可以理解，密封装置r不限于安装于内壁Hw和电机轴S之间，电机轴S可以是其它形式或用途的轴构件，该轴构件可以例如具有以下功能中的一种或多种：将电机的扭矩传递到变速器，将变速器的扭矩传递到电机，将变速器的扭矩输出，将扭矩输入到变速器。
(v)过滤膜20不限于上面描述的情况，过滤膜20还可以是防水透气膜。防水透气膜可以但不限于包括PU(聚氨酯)膜、TPU(热塑性聚氨酯弹性体)膜、EPTFE(聚四氟乙烯)膜。防水透气膜可以是多层材料构成的复合膜。

Claims (15)

  1. 一种用于电桥驱动系统的通气阀，所述电桥驱动系统具有用于容纳变速器的第一腔室(C1)和用于容纳电机(E)的第二腔室(C2)，所述通气阀用于控制流体在所述第一腔室(C1)和所述第二腔室(C2)之间的导通，其中，
    所述通气阀包括阀身(10)，所述阀身(10)的内部形成有用于连通所述第一腔室(C1)和所述第二腔室(C2)的通道(100)，所述通道(100)的两端分别形成为第一开口(100a)和第二开口(100b)，所述第一开口(100a)用于与所述第一腔室(C1)连接，所述第二开口(100b)用于与所述第二腔室(C2)连接，
    所述通道(100)包括变径区，所述变径区形成为朝向所述第一开口(100a)渐缩的锥形。
  2. 根据权利要求1所述的通气阀，其特征在于，所述变径区包括在所述通道(100)的流通方向上相邻的第一区段(101)和第二区段(102)，所述第一区段(101)比所述第二区段(102)更靠近所述第一开口(100a)，
    沿着所述通道(100)的流通方向，从所述第一开口(100a)向所述第二开口(100b)每移动单位长度，所述第一区段(101)的垂直于所述流通方向的横截面的面积的增大量小于所述第二区段(102)的垂直于所述流通方向的横截面的面积的增大量。
  3. 根据权利要求2所述的通气阀，其特征在于，所述第一开口(100a)位于所述第一区段(101)的一个端部。
  4. 根据权利要求1所述的通气阀，其特征在于，所述通道(100)还包括直筒区，在所述通道(100)的流通方向上，所述直筒区的垂直于所述流通方向的横截面的面积保持不变，
    所述直筒区与所述变径区的朝向所述第二开口(100b)的端部相连。
  5. 根据权利要求1所述的通气阀，其特征在于，所述阀身(10)包括主体(11)和连接部(12)，所述连接部(12)的外径小于所述主体(11)的外径，所述连接部(12)用于嵌入管状的安装座(T)内而固定所述通气阀，
    所述变径区形成于所述主体(11)。
  6. 根据权利要求1至5中任一项所述的通气阀，其特征在于，所述通气阀还包括过滤膜(20)，所述过滤膜(20)设置在所述通道(100)内，所述过滤膜(20)是防水透气膜。
  7. 根据权利要求1至5中任一项所述的通气阀，其特征在于，所述通气阀还包括过滤膜(20)，所述过滤膜(20)设置在所述通道(100)内，
    所述过滤膜(20)包括第一面(20a)和第二面(20b)，所述第一面(20a)朝向所述第一开口(100a)，所述第二面(20b)朝向所述第二开口(100b)，
    所述过滤膜(20)允许空气从所述第一面(20a)所在侧流向所述第二面(20b)所在侧，也允许空气从所述第二面(20b)所在侧流向所述第一面(20a)所在侧，
    所述过滤膜(20)允许液体从所述第二面(20b)所在侧流向所述第一面(20a)所在侧，且能阻止液体从所述第一面(20a)所在侧流向所述第二面(20b)所在侧。
  8. 一种用于电桥驱动系统的通气阀组件，其特征在于，包括安装座(T)和根据权利要求1至6中任一项所述的通气阀(B)，
    所述安装座(T)呈管状并包括第一端口(Ta)和第二端口(Tb)，所述通气阀(B)的所述第二开口(100b)与所述第一端口(Ta)相连。
  9. 根据权利要求8所述的通气阀组件，其特征在于，所述安装座(T)包括第一部分(T1)和第二部分(T2)，所述第一部分(T1)的轴线与所述第二部分(T2)的轴线不共线。
  10. 一种电桥驱动系统，其特征在于，包括壳体(H)和根据权利要求8或9所述的通气阀组件，
    所述壳体(H)形成有所述第一腔室(C1)和所述第二腔室(C2)，
    所述通气阀组件在所述壳体(H)内的安装位置位于所述第二腔室(C2)的液面的上方，
    所述通气阀组件的所述通气阀(B)的所述第一开口(100a)向所述第一腔室(C1)开放，
    所述通气阀组件的所述安装座(T)的第二端口(Tb)向所述第二腔室(C2)开放。
  11. 根据权利要求10所述的电桥驱动系统，其特征在于，所述通气阀(B)被容纳于所述第二腔室(C2)内。
  12. 根据权利要求10所述的电桥驱动系统，其特征在于，所述第一腔室(C1)和所述第二腔室(C2)由所述壳体(H)的内壁(Hw)间隔开，所述安装座(T)穿过或安装到所述内壁(Hw)。
  13. 根据权利要求10至12中任一项所述的电桥驱动系统，其特征在于，所述第一开口(100a)竖直向下地设置。
  14. 根据权利要求12所述的电桥驱动系统，其特征在于，所述第一腔室(C1)用于容纳变速器，所述第二腔室(C2)用于容纳电机(E)，
    所述电桥驱动系统还包括穿过所述内壁(Hw)设置的轴构件，在所述轴构件与所述内壁(Hw)之间设置有密封装置(r)，所述通气阀组件设置在所述密封装置(r)的上方。
  15. 根据权利要求14所述的电桥驱动系统，其特征在于，所述电桥驱动系统还包括安装于所述壳体(H)的外部阀(Bg)，所述外部阀(Bg)允许空气进入或流出所述第二腔室(C2)。
PCT/CN2021/113190 2021-08-18 2021-08-18 用于电桥驱动系统的通气阀、通气阀组件和电桥驱动系统 WO2023019459A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046788A (en) * 1990-07-19 1991-09-10 Allied-Signal Inc. Pressure piloted release valve
CN208190393U (zh) * 2018-02-12 2018-12-04 比亚迪股份有限公司 电动总成和具有其的车辆
CN209488336U (zh) * 2019-03-15 2019-10-11 浙江方正电机股份有限公司 一种集成式驱动电桥的壳体
CN110385983A (zh) * 2018-04-18 2019-10-29 舍弗勒技术股份两合公司 电桥驱动系统和车辆
JP2021028183A (ja) * 2019-08-09 2021-02-25 三菱自動車工業株式会社 車両の駆動装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046788A (en) * 1990-07-19 1991-09-10 Allied-Signal Inc. Pressure piloted release valve
CN208190393U (zh) * 2018-02-12 2018-12-04 比亚迪股份有限公司 电动总成和具有其的车辆
CN110385983A (zh) * 2018-04-18 2019-10-29 舍弗勒技术股份两合公司 电桥驱动系统和车辆
CN209488336U (zh) * 2019-03-15 2019-10-11 浙江方正电机股份有限公司 一种集成式驱动电桥的壳体
JP2021028183A (ja) * 2019-08-09 2021-02-25 三菱自動車工業株式会社 車両の駆動装置

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