WO2025199728A1 - 电动油泵 - Google Patents

电动油泵

Info

Publication number
WO2025199728A1
WO2025199728A1 PCT/CN2024/083738 CN2024083738W WO2025199728A1 WO 2025199728 A1 WO2025199728 A1 WO 2025199728A1 CN 2024083738 W CN2024083738 W CN 2024083738W WO 2025199728 A1 WO2025199728 A1 WO 2025199728A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial
hole
heat conducting
main body
oil pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/083738
Other languages
English (en)
French (fr)
Inventor
袁利军
葛智
邓德兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to PCT/CN2024/083738 priority Critical patent/WO2025199728A1/zh
Publication of WO2025199728A1 publication Critical patent/WO2025199728A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring

Definitions

  • the present invention relates to the technical field of oil pumps, and in particular to an electric oil pump with a temperature sensor.
  • An electric oil pump is a device used to drive fluid flow and generate fluid pressure in a mechanical system.
  • electric oil pumps are commonly used in current motor vehicles to drive working fluid for cooling and lubrication.
  • An electric oil pump generally includes components such as a drive motor, a pump rotor assembly, and a controller mounted in a housing. The drive motor and the controller are mounted in different chambers in the housing. In the motor cavity where the drive motor is mounted, there is engine oil for cooling and lubrication.
  • a temperature sensor is required to measure the temperature of the engine oil in the motor cavity in order to monitor the operating status of the drive motor. The temperature sensor needs to be connected to the controller to provide the controller with a measured temperature signal.
  • temperature sensors can be installed at different locations in an electric oil pump.
  • the installation location of the temperature sensor has a significant impact on the accuracy of temperature measurement.
  • the temperature sensor is installed in a groove on the side of the partition facing the controller.
  • the temperature sensor is installed in an insert-type manner, which is easily damaged during installation, has high installation costs, and is difficult to implement through automated procedures.
  • the leads of the temperature sensor are exposed in the installation groove and may accidentally contact the surrounding metal materials, causing the risk of leakage.
  • the technical problem to be solved by the present invention is to provide an electric oil pump with an improved temperature sensing method.
  • the electric oil pump includes a drive motor, a pump rotor assembly, a controller, a temperature sensor and a housing.
  • the controller controls to drive the pump rotor assembly.
  • the housing includes a partition plate, a motor cavity for installing the drive motor, and a control cavity for installing the controller.
  • the motor cavity and the control cavity are arranged adjacent to each other in the axial direction and separated by the partition plate.
  • the temperature sensor is fixed to the side surface of the controller facing the motor cavity.
  • the partition plate includes a main body and a heat-conducting plate made of heat-conducting material.
  • the main body includes an axial perforation formed in an area corresponding to the temperature sensor.
  • the heat-conducting plate is fixed to the main body at the axial perforation to close the axial perforation, so that the oil in the motor cavity can flow directly to the heat-conducting plate through the axial perforation.
  • the drive motor may include an axially extending motor shaft.
  • the motor shaft may include an oil inlet hole extending axially therethrough for introducing oil into the motor cavity via the oil inlet hole in a direction toward the partition plate, with the axial through-hole aligned with the oil inlet hole. Because the oil inlet hole is aligned with the axial through-hole, oil introduced into the motor cavity via the oil inlet hole can flow directly into the axial through-hole and contact the heat conducting plate. This enhances oil fluidity in the area contacted by the heat conducting plate, thereby improving temperature sensing accuracy.
  • the motor shaft can extend axially into the axial through-hole without contacting the axial through-hole or the heat conducting plate. This reduces the distance between the outlet of the oil inlet and the heat conducting plate, allowing the heat conducting plate to more fully contact the engine oil.
  • the heat conducting plate may include a central portion extending in a plane perpendicular to the axial direction and an edge portion surrounding the central portion.
  • the heat conducting plate may close the axial perforation via the central portion and be fixedly connected to the main body via the edge portion.
  • the edge portion may be fixed to the main body, for example, by press-fitting or embedding.
  • the main body can be made of injection molding material
  • the edge portion can be made of injection molding material.
  • the edge portion can be offset relative to the main body portion in a direction away from the control chamber and can be encapsulated in the material of the main body portion, thereby achieving a secure connection between the edge portion and the main body portion in a simple manner.
  • an axial gap may exist between the temperature sensor and the heat conducting plate, and the electric oil pump may further include a thermally conductive filling material to fill the axial gap.
  • the thermally conductive filling material can further improve the heat conduction between the heat conducting plate and the temperature sensor.
  • the thermally conductive filling material may be a thermally conductive adhesive. This allows the thermally conductive filling material to be simply filled between the temperature sensor and the heat conducting plate.
  • the heat conducting plate can be made of steel material.
  • the heat conducting plate made of steel material has sufficient strength and good thermal conductivity, and can be thinner, thereby further improving the thermal conductivity effect.
  • FIG1 shows a cross-sectional view of an electric oil pump according to an exemplary embodiment of the present invention
  • FIG2 shows a partial enlarged view of the electric oil pump shown in FIG1 ;
  • FIG3 shows a perspective view of the heat conducting plate of the electric oil pump shown in FIG1 ;
  • FIG. 4 illustrates a cross-sectional view of an electric oil pump according to another exemplary embodiment of the present invention.
  • an electric oil pump for driving a working fluid and generating fluid pressure.
  • the accompanying drawings illustrate exemplary embodiments of the electric oil pump according to the present invention. The specific structure of the electric oil pump will be described below with reference to the accompanying drawings.
  • FIG1 shows a longitudinal cross-sectional view of an electric oil pump according to an exemplary embodiment.
  • the electric oil pump mainly includes a drive motor 10, a pump rotor assembly 20, a controller 30, a temperature sensor 40, and a housing 50.
  • the drive motor 10 includes a stator 11, a rotor 12, and a motor shaft 13.
  • the stator 11 is fixed within the housing 50.
  • the rotor 12 is coaxially mounted radially inwardly of the stator 11 and is rotatable relative to the stator 11 about a central axis parallel to the axial direction.
  • the motor shaft 13 protrudes axially beyond the drive motor 10 to be drivingly connected to the pump rotor assembly 20.
  • the motor shaft 13 transmits the drive torque generated by the drive motor 10 to the pump rotor assembly 20, thereby driving the pump rotor assembly 20 to rotate and generate pump suction.
  • the operation of the drive motor 10 is controlled by a controller 30.
  • the controller 30 is also fixedly mounted within the housing 50 and is axially located outside the end of the drive motor 10 that is distal to the pump rotor assembly 20.
  • the housing 50 is formed with two different chambers for mounting the drive motor 10 and the controller 30, respectively.
  • the chamber where the drive motor 10 is mounted is called the motor chamber C1
  • the control chamber C2 is arranged adjacent to each other in the axial direction.
  • a portion of the housing 50 is axially located between the drive motor 10 and the controller 30, thereby separating the motor chamber C1 from the control chamber C2.
  • This portion of the housing 50 can be referred to as a partition plate.
  • the partition plate can extend generally perpendicular to the axial direction, with the drive motor 10 and the controller 30 located axially on either side of the partition plate. Engine oil filled in the motor chamber C1 cannot pass through the partition plate and enter the control chamber C2 where the controller 30 is mounted.
  • FIG 2 shows a partial enlarged view of the electric oil pump shown in Figure 1 at the partition plate.
  • the controller 30 can be a plate-like component extending substantially perpendicular to the axial direction of the drive motor, such as a printed circuit board.
  • the controller 30 has two axially opposite side surfaces, one of which is axially facing the motor cavity C1 and the partition plate.
  • the temperature sensor 40 for measuring the oil temperature in the motor cavity C1 is directly fixedly mounted to the side surface of the controller 30 facing the motor cavity C1.
  • the temperature sensor 40 can be fixed to the controller 30 by surface mounting technology (SMT).
  • SMT surface mounting technology
  • the temperature sensor 40 is communicatively connected to the controller 30 so as to be able to provide a measured temperature signal to the controller 30.
  • the partition plate of the housing 50 is not an integrally formed component, but includes a main body 51 and a heat conducting plate 52 mounted together.
  • the main body 51 includes an axial through hole 51a formed in a region corresponding to the temperature sensor 40.
  • the region corresponding to the temperature sensor 40 is referred to as the temperature sensor 40.
  • the orthographic projections of the temperature sensor 40 and the axial through-hole 51a in the axial direction at least partially overlap.
  • the orthographic projection of the temperature sensor 40 in the axial direction preferably completely falls within the cross-sectional area of the axial through-hole 51a.
  • the axial through-hole 51a can be a straight through-hole extending in the axial direction, that is, the orthographic projections of the cross-sections at different positions in the axial direction completely overlap.
  • the cross-sectional shape can be, for example, circular or polygonal.
  • the heat conducting plate 52 is made of a heat conducting material, in particular a metal material, preferably a steel material.
  • the materials of the heat conducting plate 52 and the main body 51 are usually different.
  • the main body 51 can usually be made of an injection molding material (such as various plastic materials) or a lightweight metal material such as an aluminum alloy.
  • the thermal conductivity of the injection molding material is not as good as that of the metal material, and the aluminum alloy cannot be made into a partition plate with a smaller thickness due to its porosity. Therefore, the heat conducting plate 52 made of a heat conducting material has a better heat conducting effect than the main body 51 due to its higher thermal conductivity and/or ability to be processed into a thinner plate.
  • the motor shaft 13 may include an axially penetrating oil inlet hole 13a.
  • the oil inlet hole 13a can introduce the oil from one end of the pump rotor assembly 20 into the motor cavity C1 in the direction toward the partition plate. Therefore, the oil entering the motor cavity C1 through the oil inlet hole 13a will first reach the space between the end of the motor shaft 13 facing the partition plate and the partition plate.
  • the heat conducting plate 52 may preferably have a thickness less than that of the main body 51, at least in the portion coinciding with the axial projection of the axial through-hole 51a.
  • the heat conducting plate 52 may be formed from a plate having a substantially uniform thickness, with the plate having an overall relatively small thickness, particularly substantially less than that of the main body 51.
  • the portion of the heat conducting plate 52 coinciding with the axial projection of the axial through-hole 51a may preferably be arranged flush with the side surface of the main body 51 facing the control chamber C2. This arrangement not only brings the heat conducting plate 52 closer to the temperature sensor 40, but also allows the engine oil flowing into the axial through-hole 51a to be closer to the temperature sensor 40.
  • FIG3 shows a perspective view of the heat conducting plate 52.
  • the heat conducting plate 52 may include a central portion 52a extending in a plane perpendicular to the axial direction and an edge portion 52b surrounding the central portion 52a.
  • the edge portion 52b may be an annular folded portion formed integrally with the central portion 52a.
  • the central portion 52a covers the cross section of the axial through-hole 51a, thereby closing the axial through-hole 51a, and on the other hand, the edge portion 52b is fixedly connected to the main body 51, thereby mounting the heat conducting plate 52 to the main body 51.
  • the fixed connection between the edge portion 52b and the main body 51 can be achieved in different ways.
  • the embodiment shown in Figure 2 adopts a preferred connection method.
  • the main body 51 is made of injection molding material (for example, various plastic materials)
  • the edge portion 52b is offset relative to the main body 51 in a direction away from the control chamber C2 and is coated into the material of the main body 51 during the injection molding process, thereby achieving the fixed connection between the edge portion 52b and the main body 51.
  • the edge portion 52b can be firmly fixed to the main body 51 and has a good sealing effect.
  • the center portion 52a can preferably be arranged flush with the side surface of the main body 51 facing the control chamber C2.
  • the edge portion 52b also can be fixed to the inner surface of the axial perforation 51a by the mode of tight fit or press fit.
  • the edge portion 52b can be formed as a roughly cylindrical shape.
  • a sealing ring can also be additionally provided to improve the sealing effect.
  • the electric oil pump may also include a thermally conductive filling material 60 to fill the axial gap.
  • the thermally conductive filling material 60 may be a thermally conductive adhesive. The thermally conductive filling material 60 connects the heat conducting plate 52 to the temperature sensor 40, allowing heat to be directly transferred from the heat conducting plate 52 to the temperature sensor 40, further improving measurement accuracy.
  • the heat conduction plate improves heat conduction between the motor cavity and the temperature sensor, reducing the direct distance between the temperature sensor and the oil in the motor cavity, thereby improving temperature measurement accuracy. Furthermore, the temperature sensor can be directly mounted to the controller, facilitating assembly, which helps reduce production costs and adapts to mass production.
  • Reference Signs 10. Drive motor 11 stator 12 rotors 13 Motor shaft 13a Oil inlet hole 20 Pump rotor assembly 30 Controller 40 Temperature Sensor 50 shell 51 Main body 51a Axial perforation 52 heat conducting plate 52a Center 52b Edge 60 Thermal conductive filling material C1 motor cavity C2 control chamber

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

一种电动油泵。该电动油泵包括驱动电机（10）、泵转子组件（20）、控制器（30）、温度传感器（40）和壳体（50），驱动电机（10）由控制器（30）控制来驱动泵转子组件（20），壳体（50）包括分隔板、安装驱动电机（10）的电机腔（C1）以及安装控制器（30）的控制腔（C2），电机腔（C1）和控制腔（C2）沿轴向相邻布置并且由分隔板分隔开。温度传感器（40）固定到控制器（30）的朝向电机腔（C1）的侧表面，分隔板包括主体部（51）以及由导热材料制成的导热板（52），主体部（51）包括形成在对应于温度传感器（40）的区域中的轴向穿孔（51a），导热板（52）在轴向穿孔（51a）处固定到主体部（51）以封闭轴向穿孔（51a），使得电机腔（C1）中的机油能够经由轴向穿孔（51a）直接流动至导热板（52）。该电动油泵具有改进的温度感测方式。

Description

电动油泵 技术领域
本发明涉及油泵技术领域。具体地，本发明涉及一种具有温度传感器的电动油泵。
背景技术
电动油泵是用于在机械系统中驱动流体流动和产生流体压力的装置。例如，在当前的机动车辆中通常使用电动油泵来驱动用于冷却和润滑的工作流体。电动油泵通常包括安装在壳体中的驱动电机、泵转子组件和控制器等部件。驱动电机和控制器安装在壳体中的不同腔室中。在安装驱动电机的电机腔中存在用于冷却和润滑的机油。需要通过温度传感器来测量电机腔中机油的温度，以便监控驱动电机的运行状态。温度传感器需要与控制器连接以向控制器提供测量的温度信号。
在现有技术中，温度传感器可以安装在电动油泵中不同的位置处。温度传感器的安装位置对温度测量的精度具有显著影响。例如，在CN 218325063 U所公开的电动油泵中，温度传感器安装在位于隔板的朝向控制器的一侧上的凹槽中。在这种设计中，温度传感器采用插入式安装，在安装过程中容易受损，安装成本高，并且难以通过自动化程序实现。此外，温度传感器的引线暴露在安装槽中，可能意外接触周围的金属材料而引发漏电风险。
发明内容
因此，本发明需要解决的技术问题是，提供一种具有改进的温度感测方式的电动油泵。
上述技术问题通过根据本发明的一种电动油泵而得到解决。该电动油泵包括驱动电机、泵转子组件、控制器、温度传感器和壳体，驱动电机由 控制器控制来驱动泵转子组件，壳体包括分隔板、安装驱动电机的电机腔以及安装控制器的控制腔，电机腔和控制腔沿轴向相邻布置并且由分隔板分隔开。其中，温度传感器固定到控制器的朝向电机腔的侧表面，分隔板包括主体部以及由导热材料制成的导热板，主体部包括形成在对应于温度传感器的区域中的轴向穿孔，导热板在轴向穿孔处固定到主体部以封闭轴向穿孔，使得电机腔中的机油能够经由轴向穿孔直接流动至导热板。通过在分隔板的对应于温度传感器的区域中设置导热板，改善了电机腔与温度传感器之间的导热效果，由此提高了对电机腔中机油温度的感测效果。同时，温度传感器的安装方式更加简单。
根据本发明的一个优选实施例，驱动电机可以包括轴向延伸的电机轴，电机轴可以包括轴向贯穿的进油孔，用于将机油经由进油孔沿朝向分隔板的方向引入电机腔中，轴向穿孔与进油孔对准。由于进油孔与轴向穿孔对准，经由进油孔引入电机腔中的机油可以直接流动到轴向穿孔中并且接触导热板，这使得导热板所接触的区域中的机油流动性增强，由此提高温度感测的精度。
根据本发明的另一优选实施例，电机轴可以沿轴向延伸到轴向穿孔内并且不接触轴向穿孔和导热板。这使得进油孔的出口与导热板之间的距离更小，导热板能够更充分地接触机油。
根据本发明的另一优选实施例，导热板可以至少在与轴向穿孔的轴向投影重合的部分中具有小于主体部的厚度，由此可以减小机油与温度传感器之间的距离，并且提高导热板的导热效果。
根据本发明的另一优选实施例，导热板的与轴向穿孔的轴向投影重合的部分可以与主体部的朝向控制腔的侧表面齐平布置。这使得导热板更加靠近温度传感器，从而提高温度感测效果。
根据本发明的另一优选实施例，导热板可以包括在垂直于轴向的平面中延伸的中心部以及环绕中心部的边缘部，导热板可以通过中心部封闭轴向穿孔并且通过边缘部与主体部固定连接。边缘部例如可以通过压装或嵌入等方式固定到主体部。
根据本发明的另一优选实施例，主体部可以由注塑材料制成，边缘部 可以相对于主体部朝向远离控制腔的方向偏移并且包覆到主体部的材料中。由此以简单的方式实现了边缘部与主体部之间的牢固连接。
根据本发明的另一优选实施例，温度传感器与导热板之间可以存在轴向间隙，电动油泵还可以包括填充轴向间隙的导热填充材料。导热填充材料可以进一步提高导热板与温度传感器之间的导热效果。优选地，导热填充材料可以是导热粘合剂。由此可以通过简单的方式在温度传感器与导热板之间填充导热填充材料。
根据本发明的另一优选实施例，导热板可以由钢材料制成。钢材料制成的导热板具有足够的强度和良好的导热性能，同时可以具有更薄的厚度，从而进一步提高导热效果。
附图说明
以下结合附图进一步描述本发明。图中以相同的附图标记来代表功能相同的元件。其中：
图1示出根据本发明的一个示例性实施例的电动油泵的剖视图；
图2示出图1所示的电动油泵的局部放大图；
图3示出图1所示的电动油泵的导热板的立体图；和
图4示出根据本发明的另一示例性实施例的电动油泵的剖视图。
具体实施方式
以下将结合附图描述根据本发明的电动油泵的具体实施方式。下面的详细描述和附图用于示例性地说明本发明的原理，本发明不限于所描述的优选实施例，本发明的保护范围由权利要求书限定。
根据本发明的实施例，提供了一种用于驱动工作流体和产生流体压力的电动油泵。附图示出了根据本发明的电动油泵的示例性实施例。下面结合附图来说明这种电动油泵的具体结构。
图1示出了根据示例性实施例的电动油泵的纵向剖视图。如图1所示，这种电动油泵主要包括驱动电机10、泵转子组件20、控制器30、温度传感器40和壳体50。驱动电机10包括定子11、转子12和电机轴13。定子 11固定在壳体50内，转子12同轴地安装在定子11的径向内侧并且能够围绕平行于轴向方向的中心轴线相对于定子11转动。大致沿轴向延伸的电机轴13同轴地固定在转子12的径向内侧，从而能够随着转子12围绕共同的中心轴线相对于定子11及壳体40转动。电机轴13沿轴向突出到驱动电机10之外以与泵转子组件20传动连接。电机轴13将驱动电机10产生的驱动扭矩传递到泵转子组件20，从而驱动泵转子组件20转动来产生泵吸力。驱动电机10的运行由控制器30来控制。控制器30也固定安装到壳体50中，并且在轴向上位于驱动电机10的远离泵转子组件20的端部外侧。
当驱动电机10运行时，转子12高速转动，并且定子11中的线圈绕组会产生大量热量，因此在安装驱动电机10的空间中需要填充一定量的液体(通常为机油)来对驱动电机10进行冷却和润滑。为了防止机油侵入控制器30中，壳体50形成有分别用于安装驱动电机10和控制器30的两个不同的腔室。安装驱动电机10的腔室称为电机腔C1，而安装控制器30的腔室称为控制腔C2。电机腔C1和控制腔C2沿轴向相邻布置。壳体50的一部分在轴向上位于驱动电机10与控制器30之间，从而将电机腔C1与控制腔C2分隔开。壳体50的该部分可以称为分隔板。如图1所示，分隔板可以大致沿垂直于轴向的方向延伸，驱动电机10和控制器30在轴向上位于分隔板的两侧。电机腔C1中填充的机油不能越过分隔板进入安装控制器30的控制腔C2。
图2示出了图1所示的电动油泵在分隔板处的局部放大图。如图2所示，控制器30可以是基本垂直于驱动电机的轴向方向延伸的板状部件，例如印刷电路板。控制器30具有两个沿轴向相对的侧表面，其中一个侧表面沿轴向朝向电机腔C1和分隔板。用于测量电机腔C1中的机油温度的温度传感器40直接固定安装到控制器30的朝向电机腔C1的侧表面。例如，温度传感器40可以通过表面组装技术(SMT)固定到控制器30。温度传感器40与控制器30通信连接，从而能够向控制器30提供测得的温度信号。
如图2所示，壳体50的分隔板并非一体形成的部件，而是包括安装在一起的主体部51和导热板52。主体部51包括形成在对应于温度传感器40的区域中的轴向穿孔51a。对应于温度传感器40的区域指的是温度传感器 40和轴向穿孔51a两者在轴向方向上的正投影至少部分地重叠，特别是温度传感器40在轴向方向上的正投影优选地完全落入轴向穿孔51a的横截面的范围之内。优选地，轴向穿孔51a可以是沿轴向方向延伸的直通孔，即轴向方向上不同位置处的横截面沿轴向方向的正投影完全重合，其横截面的形状例如可以为圆形或多边形。
导热板52由导热材料制成，特别是金属材料，优选为钢材料。导热板52和主体部51的材料通常是不同的。主体部51通常可以由注塑材料(例如各种塑料材料)或者铝合金等轻质金属材料制成。注塑材料的导热性能不如金属材料，而铝合金由于多孔性而不能制成厚度较小的分隔板材。因此，由导热材料制成的导热板52由于具有更高的导热率和/或能够加工成更薄的板材而具有比主体部51更好的导热效果。
导热板52在轴向穿孔51a处固定到主体部51从而封闭轴向穿孔51a。因此，主体部51和导热板52共同将电机腔C1与控制腔C2分隔开，使得电机腔C1中的机油不能越过分隔板进入控制腔C2。同时，电机腔C1中的机油能够经由轴向穿孔51a直接流动至导热板52，这使得电机腔C1中的机油能够接触导热板52并且将热量传导至导热板52。由于导热板52的与轴向穿孔51a对应的部分也同样对应于温度传感器40，因此可以将电机腔C1中机油的热量传导至温度传感器40，使得温度传感器40能够精确地感测机油的温度。
优选地，如图1和图2所示，电机轴13可以包括轴向贯穿的进油孔13a。进油孔13a可以将来自泵转子组件20的一端的机油沿朝向分隔板的方向引入电机腔C1中。因此，经由进油孔13a进入电机腔C1中的机油将会首先到达电机轴13的朝向分隔板的端部与分隔板之间的空间中。轴向穿孔51a可以优选地与进油孔13a对准，即轴向穿孔51a和进油孔13a两者沿轴向方向的正投影至少部分地重叠，特别是进油孔13a在轴向方向上的正投影优选地完全落入轴向穿孔51a的横截面的范围之内。这使得轴向穿孔51a和导热板52所接触的机油具有较高的流动性，从而提高温度感测的精度。在这种情况下，电机轴13可以优选地沿轴向延伸到轴向穿孔51a内，但不接触轴向穿孔51a和导热板52。这既可以减小进油孔13a的出口与导 热板52的间距，又避免分隔板干扰电机轴13的转动。
如前所述，为了提高导热板52的导热率，导热板52可以优选地至少在与轴向穿孔51a的轴向投影重合的部分中具有小于主体部51的厚度。特别是，导热板52可以由基本厚度均匀的板材制成，该板材整体具有较小的厚度，特别是远小于主体部51的厚度。为了使导热板52更加靠近温度传感器40，导热板52的与轴向穿孔51a的轴向投影重合的部分可以优选地与主体部51的朝向控制腔C2的侧表面齐平布置。通过这种布置方式，一方面导热板52更加靠近温度传感器40，另一方面流入轴向穿孔51a中的机油也能够更加靠近温度传感器40。
图3示出了导热板52的立体图。如图3所示，在优选的实施例中，导热板52可以包括基恩在垂直于轴向的平面中延伸的中心部52a以及环绕中心部52a的边缘部52b。边缘部52b可以是与中心部52a一体形成的环形折边部分。如图2所示，当导热板52安装到主体部51时，一方面，中心部52a覆盖轴向穿孔51a的横截面从而封闭轴向穿孔51a，另一方面，边缘部52b与主体部51固定连接，从而将导热板52安装到主体部51。
边缘部52b与主体部51固定连接可以通过不同的方式来实现。图2所示的实施例采用了一种优选的连接方式。具体而言，在图2所示的实施例中，主体部51由注塑材料(例如，各种塑料材料)制成，边缘部52b相对于主体部51朝向远离控制腔C2的方向偏移并且在注塑成型工艺期间包覆到主体部51的材料中，由此实现了边缘部52b与主体部51固定连接。这使得边缘部52b能够牢固地固定到主体部51，并且具有良好的密封效果。如前所述，在这种情况下，中心部52a可以优选地与主体部51的朝向控制腔C2的侧表面齐平布置。
替代地，边缘部52b也可以通过紧配合或压入配合的方式固定到轴向穿孔51a的内表面上。在这种情况下，边缘部52b可以形成为大致圆筒状。此外，在这种情况下，还可以附加地设置密封圈来提高密封效果。
如图2所示，为了便于装配，在安装就位时，温度传感器40与导热板52之间通常可以存在轴向间隙，使得温度传感器40不直接接触分隔板。这种间隙有可能影响导热效果。为此，图4示出了一种改进的实施例。如 图4所示，电动油泵还可以附加地包括填充这种轴向间隙的导热填充材料60。例如，导热填充材料60可以是导热粘合剂。导热填充材料60将导热板52与温度传感器40连接起来，可以将热量从导热板52直接传递至温度传感器40，从而进一步提高测量精度。
在根据本发明的电动油泵中，通过导热板改善了电机腔与温度传感器之间的导热效果，降低了温度传感器与电机腔中机油的直接距离，由此提高了温度测量的精度。同时，温度传感器可以直接安装到控制器，便于组装，这有助于降低生产成本和适应批量化生产。
虽然在上述说明中示例性地描述了可能的实施例，但是应当理解到，仍然通过所有已知的和此外技术人员容易想到的技术特征和实施方式的组合存在大量实施例的变化。此外还应该理解到，示例性的实施方式仅仅作为一个例子，这种实施例绝不以任何形式限制本发明的保护范围、应用和构造。通过前述说明更多地是向技术人员提供一种用于转化至少一个示例性实施方式的技术指导，其中，只要不脱离权利要求书的保护范围，便可以进行各种改变，尤其是关于所述部件的功能和结构方面的改变。
附图标记表
10 驱动电机
11 定子
12 转子
13 电机轴
13a 进油孔
20 泵转子组件
30 控制器
40 温度传感器
50 壳体
51 主体部
51a 轴向穿孔
52 导热板
52a 中心部
52b 边缘部
60 导热填充材料
C1 电机腔
C2 控制腔

Claims (10)

  1. 一种电动油泵，包括驱动电机(10)、泵转子组件(20)、控制器(30)、温度传感器(40)和壳体(50)，所述驱动电机(10)由所述控制器(30)控制来驱动所述泵转子组件(20)，所述壳体(50)包括分隔板、安装所述驱动电机(10)的电机腔(C1)以及安装所述控制器(30)的控制腔(C2)，所述电机腔(C1)和所述控制腔(C2)沿轴向相邻布置并且由所述分隔板分隔开，
    其特征在于，
    所述温度传感器(40)固定到所述控制器(30)的朝向所述电机腔(C1)的侧表面，所述分隔板包括主体部(51)以及由导热材料制成的导热板(52)，所述主体部(51)包括形成在对应于所述温度传感器(40)的区域中的轴向穿孔(51a)，所述导热板(52)在所述轴向穿孔(51a)处固定到所述主体部(51)以封闭所述轴向穿孔(51a)，使得所述电机腔(C1)中的机油能够经由所述轴向穿孔(51a)直接流动至所述导热板(52)。
  2. 根据权利要求1所述的电动油泵，其特征在于，所述驱动电机(10)包括轴向延伸的电机轴(13)，所述电机轴(13)包括轴向贯穿的进油孔(13a)，用于将机油经由所述进油孔(13a)沿朝向所述分隔板的方向引入所述电机腔(C1)中，所述轴向穿孔(51a)与所述进油孔(13a)对准。
  3. 根据权利要求2所述的电动油泵，其特征在于，所述电机轴(13)沿轴向延伸到所述轴向穿孔(51a)内并且不接触所述轴向穿孔(51a)和所述导热板(52)。
  4. 根据权利要求1所述的电动油泵，其特征在于，所述导热板(52)至少在与所述轴向穿孔(51a)的轴向投影重合的部分中具有小于所述主体部(51)的厚度。
  5. 根据权利要求4所述的电动油泵，其特征在于，所述导热板(52)的与所述轴向穿孔(51a)的轴向投影重合的部分与所述主体部(51)的朝向所述控制腔(C2)的侧表面齐平布置。
  6. 根据权利要求4所述的电动油泵，其特征在于，所述导热板(52)包括在垂直于轴向的平面中延伸的中心部(52a)以及环绕所述中心部(52a)的边缘部(52b)，所述导热板(52)通过所述中心部(52a)封闭所述轴向穿孔(51a)并且通过所述边缘部(52b)与所述主体部(51)固定连接。
  7. 根据权利要求6所述的电动油泵，其特征在于，所述主体部(51)由注塑材料制成，所述边缘部(52b)相对于所述主体部(51)朝向远离所述控制腔(C2)的方向偏移并且包覆到所述主体部(51)的材料中。
  8. 根据权利要求1所述的电动油泵，其特征在于，所述温度传感器(40)与所述导热板(52)之间存在轴向间隙，所述电动油泵还包括填充所述轴向间隙的导热填充材料(60)。
  9. 根据权利要求8所述的电动油泵，其特征在于，所述导热填充材料(60)是导热粘合剂。
  10. 根据权利要求1至9中任一项所述的电动油泵，其特征在于，所述导热板(52)由钢材料制成。
PCT/CN2024/083738 2024-03-26 2024-03-26 电动油泵 Pending WO2025199728A1 (zh)

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JP2012038769A (ja) * 2010-08-03 2012-02-23 Jtekt Corp 多層回路基板、基板装置、および多層回路基板の異常判定方法
US20170082104A1 (en) * 2015-09-18 2017-03-23 Aisin Seiki Kabushiki Kaisha Electric pump
CN114183339A (zh) * 2020-09-15 2022-03-15 浙江三花汽车零部件有限公司 电子油泵
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