Electric oil pump and electric device

Abstract

The present invention relates to an electric oil pump and, more specifically, to an electric oil pump and an electric device which can measure the temperature of oil by including a temperature sensor unit on a suction flow path connecting an oil suction port and a pump chamber provided in a housing, can implement stable support with respect to a shaft, use winding coils connected for each phase winding coil in a three-phase motor, and minimize a connection route between a controller and a final end of the winding coils to simplify the structure and contribute to cost reduction. The present invention provides an electric oil pump comprising: an oil suction port provided in a housing; a pump chamber provided in the housing; a suction flow path connecting the pump chamber and the suction port; a temperature sensor unit disposed on the suction port or the suction flow path to measure the temperature of oil before flowing into the pump chamber; and a control module including a double journal bearing, a motor connected to a shaft connected to the pump, and a substrate, wherein the motor comprises a rotor and a stator, the stator includes three-phase windings of U-phase, V-phase, and W-phase, the windings of each phase are provided in plurality, the windings of the same phase are connected in series to each other, and a final line of each winding connected in series is connected to the control module, one for each phase.

Description

Electric oil pump and transmission

[0001] The present invention relates to an electric oil pump, and more particularly, to an electric oil pump and an electric device capable of measuring the temperature of oil by including a temperature sensor unit in a suction path connecting an oil suction port provided in a housing and a pump chamber, capable of implementing stable support for a shaft, using winding coils connected to each phase of a three-phase motor, and minimizing the connection route between a controller and the final stage of the winding coils, thereby simplifying the structure and contributing to cost reduction.

[0002] Electric oil pumps are essential components of automobiles and industrial machinery, circulating engine oil and other lubricants to reduce friction between components and facilitate power transmission and cooling.

[0003] It is important for these oil pumps to accurately monitor oil temperature, as improper oil temperature can impair lubrication and cooling functions.

[0004] Therefore, a sensor that measures oil temperature is essential, and its accuracy and placement within the oil passage are crucial. Conventional electric oil pumps struggle with optimizing the temperature sensor's location and ensuring accurate temperature detection.

[0005] Against this backdrop, a method is required to improve the control and performance of a pump by accurately measuring the oil temperature before it flows into the pump chamber.

[0006] In addition, these oil pumps are provided with a pump, a motor, and a shaft connecting the motor and the rotor, and one end of the shaft is supported on the pump cover, and the other end is supported on the bottom of the motor chamber.

[0007] In this case, there was a problem that the length of the shaft had to be longer, so the length of the oil pump itself had to be increased.

[0008] Or, there was a problem that the eccentricity of the shaft occurred when it was supported by a journal bearing between the pump and the motor, resulting in noise, wear, and pumping inefficiency.

[0009] Meanwhile, BLDC motors used in conventional electric oil pumps have several technical limitations in the connection between the stator coils and the control module. Typically, each coil in a three-phase motor consists of multiple coil ends, either in parallel or through a specific wiring method. These coil ends are then typically connected to the control module via separate connecting elements, such as busbars.

[0010] This method of connecting using busbars caused the following problems:

[0011] The first complex connection structure involved multiple winding coils for each phase, each connected to a busbar and then to the controller via a multi-step connection route. This complicated the overall connection between the motor and the controller. This increased the complexity of the assembly process and potentially led to connection failures.

[0012] Second, installation is inconvenient and costs increase.

[0013] The busbar is a component that must be manufactured and installed separately between the coil end of the stator and the board of the control module. This incurs manufacturing costs for the busbar itself, and an additional process is required to assemble it to the motor, which reduces the overall installation convenience and acts as a factor in increasing manufacturing costs.

[0014] This problem is further exacerbated when busbars are manufactured with complex shapes, such as those with specific gaps or slopes relative to the stator's outer surface. Furthermore, since multiple busbars must be spaced at specific intervals along the circumferential or axial direction, there is room for improvement in space efficiency.

[0015] The present invention provides an electric oil pump that has an oil intake port and a pump chamber in a housing, and can measure the temperature of oil flowing in through a suction passage arranged between the two. The purpose of this is to accurately measure the temperature of the oil before it flows into the pump chamber, thereby optimizing the operating status of the pump and maintaining oil performance.

[0016] In addition, the purpose is to provide an electric oil pump and a power unit having a double journal bearing that can achieve compact size while implementing stable support for a shaft.

[0017] The purpose is to provide an electric oil pump that uses winding coils connected to each phase of a three-phase motor and minimizes the connection route between the controller and the final stage of the winding coils, thereby simplifying the structure and contributing to cost reduction.

[0018] The present invention provides an electric oil pump characterized by including an oil suction port provided in a housing; a pump chamber provided in the housing; a suction passage connecting the pump chamber and the suction port; and a temperature sensor unit disposed on the suction port or the suction passage to measure the temperature of oil before it flows into the pump chamber.

[0019] The present invention further comprises a control housing disposed on one side of the housing and accommodating a control board, wherein the control housing is provided with a temperature sensor unit installation portion in which a temperature sensor unit is installed, and the temperature sensor unit installed in the temperature sensor unit installation portion includes: a sensor portion exposed on an intake port or an intake passage; and a connecting leg connecting the sensor portion to the control board.

[0020] In the present invention, the temperature sensor unit installation part is characterized in that a sealing unit is provided that surrounds at least a part of the connection leg of the temperature sensor unit and seals the space.

[0021] In addition, the present invention provides an electric oil pump characterized in that it further includes a motor chamber in which a motor is placed; a partition wall that partitions the pump chamber and the motor chamber; a first journal bearing that extends from one side of the partition wall and supports a shaft; and a second journal bearing that extends from the other side of the partition wall and in a direction opposite to the first journal bearing and supports a shaft.

[0022] In the present invention, the first journal bearing is characterized in that it is provided in a stepped form including a large-diameter portion and a small-diameter portion extending from the large-diameter portion, and an inner diameter space formed inwardly so that the small-diameter portion is inserted and supported at the lower center of the pump rotor.

[0023] In the present invention, the pump chamber is characterized by including a bottom channel formed on the bottom of the pump chamber; and a guide channel formed on a portion of the surface of the first journal bearing and connected to the bottom channel, and guiding oil into the journal bearing.

[0024] In the present invention, the guide passage is characterized by including a first guide passage formed along the vertical longitudinal direction on the outer surface of the first journal bearing and communicating with the bottom passage; a second guide passage formed on the upper portion of the first journal bearing and connected to the first guide passage; and a third guide passage formed along the vertical longitudinal direction on the inner surface of the first journal bearing and communicating with the second guide passage.

[0025] The present invention further includes a pump cover covering a pump chamber, and includes a first space portion and a second space portion that are arranged to face each other based on the center of the pump cover, wherein the first space portion is arranged above a suction area of ​​the pump, and the second space portion is arranged above a discharge area of ​​the pump.

[0026] The present invention provides an electric oil pump comprising: a pump; a motor connected to a shaft connected to the pump; and a control module including a substrate, wherein the motor is composed of a rotor; and a stator, and the stator includes three-phase windings of U phase, V phase, and W phase, and wherein the windings of each phase are provided in multiple numbers, wherein the windings of each same phase are connected in series with each other, and the final line of each series-connected winding is connected to the control module one for each phase.

[0027] In the present invention, the connecting lines for connecting the windings of the same phase in series are arranged inside and outside of the insulator constituting the stator, and are characterized in that they are provided in a form that surrounds at least a portion of the insulator.

[0028] The present invention is characterized in that it includes a terminal provided in a control module and a connecting portion coupled to the terminal, and the final line of each series-connected winding is respectively connected to the connecting portion.

[0029] In the present invention, an electric oil pump is provided, characterized in that the connecting part includes a first connecting part to which a terminal is connected; a second connecting part to which a final line of a connecting line of a coil winding is connected; and an intermediate part provided between the first connecting part and the second connecting part, wherein the first connecting part includes two first connecting branches spaced apart from each other and a first slit provided between the first connecting branches into which a terminal is inserted, and the second connecting part includes a second connecting branch that is provided closely so as to face each other or forms a second slit narrower than the first slit and elastically deforms according to the insertion of the final line of the winding to hold the final line of the winding.

[0030] In addition, the present invention provides a power transmission device having a double journal bearing, characterized in that it includes a rotating chamber in which a rotating body is placed; a rotating chamber in which a motor is placed; a partition wall that partitions the rotating body chamber and the motor chamber; a first journal bearing that extends from one side of the partition wall and supports a shaft; and a second journal bearing that extends from the other side of the partition wall and in a direction opposite to the first journal bearing and supports a shaft.

[0031] In the present invention, the first journal bearing is characterized in that it is provided in a stepped form including a large-diameter portion and a small-diameter portion extending from the large-diameter portion, and an inner diameter space formed inwardly so that the small-diameter portion is inserted and supported at the lower center of the rotating body.

[0032] In the present invention, it is characterized by including a bottom channel formed on the bottom of a rotating chamber; and a guide channel formed on a portion of the surface of a first journal bearing and connected to the bottom channel, and guiding oil into the inside of the journal bearing.

[0033] In the present invention, the guide passage is characterized by including a first guide passage formed along the vertical longitudinal direction on the outer surface of the first journal bearing and communicating with the bottom passage; a second guide passage formed on the upper portion of the first journal bearing and connected to the first guide passage; and a third guide passage formed along the vertical longitudinal direction on the inner surface of the first journal bearing and communicating with the second guide passage.

[0034] In the present invention, the second guide path is characterized in that it is formed diagonally from the upper portion of the first journal bearing.

[0035] According to the present invention, comprehensively, the present invention provides an electric oil pump that can measure the temperature of oil before it flows into the pump chamber through a temperature sensor unit and control the efficient operation of the pump by utilizing the temperature.

[0036] That is, not only can the temperature information of the oil passing through the drive motor or reducer of an electric vehicle be accurately identified, but the oil flow rate required for optimal cooling or lubrication of the drive motor or reducer can also be controlled.

[0037] Specifically, the present invention provides an electric oil pump that has an oil intake port and a pump chamber in a housing and can measure the temperature of oil flowing in through a intake passage arranged therebetween, thereby accurately measuring the temperature of oil before flowing into the pump chamber, thereby optimizing the operating state of the pump and maintaining the performance of the oil.

[0038] The placement of the suction duct and the temperature sensor unit allows for real-time oil temperature measurement, enabling quicker and more accurate assessment of the oil's thermal status. This facilitates pump performance and oil management. Furthermore, the integrated structure of the control board, control board cover, and housing cover simplifies connection between the temperature sensor unit and the control board, contributing to optimized motor control and pump performance.

[0039] The present invention efficiently configures a control board of a pump and a housing that protects the same, and provides a communication unit that can transmit temperature information and the operating status of the pump to an external ECU, thereby providing an electric oil pump that integrates motor control and oil temperature measurement functions.

[0040] This integrated structure of the motor and terminal module ensures a more robust electrical connection, and the communication unit enables effective information exchange with an external ECU. This allows for real-time transmission of oil temperature and pump operating status information, enabling smooth control unit command execution based on this information.

[0041] This configuration allows for increased pump efficiency and real-time monitoring of oil temperature changes to enable appropriate control.

[0042] Therefore, the present invention has the effect of maximizing the performance and reliability of an electric oil pump and performing oil temperature control and pump operation control more efficiently.

[0043] It features a dual journal bearing structure, including a first journal bearing and a second journal bearing, which support the shaft centered on a partition wall that separates the pump chamber and the motor chamber. This dual journal bearing configuration stably supports both ends of the shaft, effectively suppressing shaft eccentricity and tilting. This resolves the shaft instability problem that occurs with conventional methods that support only one end or only between the pump and motor, thereby reducing noise and wear and improving pumping efficiency. Consequently, it can enhance the overall performance and durability of the oil pump system and contribute to compactness.

[0044] In addition, the present invention is characterized in that the first journal bearing is provided in a stepped form including a large-diameter portion and a small-diameter portion, and an inner diameter space is provided so that the small-diameter portion is inserted and supported at the lower center of the pump rotor. The combination of the stepped first journal bearing and the inner diameter space of the pump rotor stably seats and supports the pump rotor on the first journal bearing, thereby minimizing unnecessary movement of the pump rotor. This further reduces the tilting amount of the shaft, thereby reducing leakage of the oil pump and increasing the flow rate, and can reduce the rotor and stator gap fluctuation, thereby minimizing compensation control, thereby reducing current consumption.

[0045] In addition, the present invention is characterized by including a bottom channel formed on the bottom of the pump chamber, and a guide channel formed on the surface of the first journal bearing and connected to the bottom channel, which guides oil into the journal bearing. The presence of this guide channel effectively assists in lubricating the bearing by allowing oil to smoothly flow into the shaft support. This reduces bearing friction, prevents wear, extends bearing life, and contributes to improving the efficiency of the entire system.

[0046] In addition, the present invention is characterized in that the guide passage includes a first guide passage, a second guide passage, and a third guide passage, which are formed in the vertical longitudinal direction on the outer surface, upper surface, and inner surface of the first journal bearing, respectively, and are connected to each other. This complex guide passage structure induces oil to move efficiently and sequentially from the bottom passage to the inside of the first journal bearing, and then to the upper hollow region of the shaft. This optimizes the circulation of lubricant inside the bearing, thereby suppressing the generation of frictional heat, ensuring stable operation of the bearing, and helping the shaft rotate smoothly.

[0047] Furthermore, the present invention features a second guide channel formed diagonally above the first journal bearing. This diagonal second guide channel optimizes the oil flow path to facilitate smoother oil flow along the rotational direction of the pump rotor. This reduces oil flow resistance, maximizing lubrication efficiency and further enhancing stable bearing operation.

[0048] Furthermore, the present invention features a pump cover comprising a first chamber and a second chamber, which are positioned above the suction and discharge areas of the pump. These chambers function as oil pockets, containing a portion of the oil therein, thereby facilitating the smooth rotation of the pump rotor, preventing wear, and improving pressure pulsation. This contributes to enhancing the operational stability and durability of the pump and reducing noise.

[0049] In addition, the present invention is characterized in that the first and second spaces are formed so that their widths increase from one side to the other, and an inwardly protruding protrusion is provided at the end of the wide area of ​​the first space, thereby dividing the end. This shape helps to evenly distribute and efficiently compress oil according to the shape of the suction port at the bottom of the pump chamber. Consequently, pumping efficiency is increased and pressure pulsation is effectively reduced, thereby optimizing the overall performance of the pump.

[0050] Furthermore, the present invention is characterized by having a hollow upper portion of the shaft, while the middle and lower portions are solid. The hollow upper portion of the shaft allows oil to flow along the guide path and be filled, and this filled oil moves to the central hole of the pump cover, where it acts as a buffer or damper. This facilitates smooth rotation of the shaft, improves lubrication, and enhances system stability.

[0051] In addition, the present invention is characterized in that a suction passage is provided in the housing, and a temperature sensor unit is positioned outside the pump chamber to measure the temperature of the oil before it flows into the pump chamber, either on the suction port or on the suction passage. By detecting and monitoring the oil temperature in real time through this temperature sensor unit, the operating conditions of the oil pump system can be accurately analyzed and managed. This optimizes the performance of the oil pump in systems sensitive to oil temperature changes and prevents damage due to potential overheating or temperature fluctuations, thereby enabling stable operation of the system.

[0052] In addition, the present invention is characterized in that a temperature sensor unit installation portion is provided in the control housing, in which a temperature sensor unit is installed, and the temperature sensor unit includes a sensor portion exposed on the suction port or suction passage and a connecting leg connecting the sensor portion to the control board. This configuration quickly and accurately transmits oil temperature information to the control board through direct connection between the sensor portion and the control board. This allows the control board to efficiently manage the operating status of the motor and continuously monitor the oil temperature to ensure stable operation of the system, and optimizes the operating conditions of the motor portion based on the collected temperature data, thereby improving the performance and durability of the oil pump.

[0053] In addition, the present invention is characterized in that a sealing unit is provided in the temperature sensor unit installation portion to seal the space surrounding at least a portion of the connection leg of the temperature sensor unit. This sealing unit effectively prevents oil in the oil path from penetrating toward the control board, thereby preventing damage to the control board due to oil leakage and foreign matter intrusion. This contributes to ensuring the reliability of electronic components and the long-term stability of the system.

[0054] In addition, in the present invention, one side of the control housing further includes a protrusion facing toward the motor chamber, the protrusion is inserted into the housing, and a sealing member is provided between the protrusion and the housing to provide airtightness, thereby preventing the inflow of foreign substances or external leakage of oil.

[0055] In addition, the present invention is characterized by including a gasket installed inside a control housing and a control housing cover, wherein a fixed damper is provided to pressurize and fix the circuit board while contacting or partially covering the control board with the gasket. This fixed damper functions to firmly fix the control board in place by directly pressing the edge of the control board. This protects the control board from external shocks or vibrations, ensuring stable operation of the system and providing ease of assembly.

[0056] Furthermore, the present invention features a bend section at the corner of the gasket, and a fixed damper provided in a fan- or arc-shaped shape inside the bend section. The specific shape of this bend section and the fixed damper facilitates installation of the control board without significantly increasing the volume of the gasket, and minimizes interference with other components. Furthermore, it reduces material costs and provides ample space for elastic deformation of the fixed damper, thereby enhancing its effective fixing function.

[0057] Furthermore, the present invention relates to a power transmission device having a double journal bearing, including a first journal bearing and a second journal bearing, which support a rotating body centered on a partition wall that divides a rotating body chamber and a motor chamber. This presents a generalized effect that can be applied not only to an electric oil pump but also to various electric devices utilizing a shaft (e.g., pumps, actuators). By stably supporting the shaft, eccentricity and tilting of the rotating body can be prevented, thereby improving the overall performance and durability of the power transmission device.

[0058] In addition, the present invention is characterized in that the first journal bearing is provided in a stepped form including a large-diameter portion and a small-diameter portion, and an inner diameter space is provided so that the small-diameter portion is inserted and supported at the lower center of the rotating body. This enables stable support of the rotating body not only for electric oil pumps but also for general electric devices including rotating bodies, thereby improving noise, wear, and efficiency issues of the rotating device and providing the effect of extending its lifespan.

[0059] In addition, the present invention is characterized by including a bottom channel formed on the bottom of the rotating chamber, and a guide channel formed on the surface of the first journal bearing and connected to the bottom channel, which guides oil into the journal bearing. This configuration facilitates lubrication of the bearings within the transmission device, thereby reducing friction of rotating parts and suppressing heat generation. This contributes to increasing the efficiency of the transmission device and extending its operating life.

[0060] Furthermore, the present invention features a first guide channel, a second guide channel, and a third guide channel, each formed longitudinally along the outer, upper, and inner surfaces of the first journal bearing and interconnected with one another. This optimizes the circulation of lubricant within the bearing within the transmission device, thereby reducing bearing wear and ensuring stable operation. In particular, it enhances the reliability of the entire system by efficiently allowing oil to reach the complex structure of the bearing.

[0061] Furthermore, the present invention features a second guide channel formed diagonally above the first journal bearing. This diagonal channel configuration facilitates the flow of oil in line with the rotational direction of the rotor, maximizing lubrication efficiency. This extends the bearing life of the transmission device and reduces unnecessary energy loss, thereby improving overall operating efficiency.

[0062] According to the present invention, an electric oil pump including a pump, a motor, and a control module, wherein the stator of the motor includes three windings of U, V, and W phases, the windings of each phase being connected in series with each other, and the final line of each winding connected in series is connected to the control module one for each phase. This simplifies the existing complex wiring structure, thereby simplifying the manufacturing process, and minimizes the use of additional components such as busbars, thereby contributing to overall cost reduction.

[0063] Additionally, the connecting wires connecting the winding coils of each phase in series are arranged inside and outside the insulator that constitutes the stator, and are arranged in a form that surrounds at least a portion of the insulator. This enables miniaturization of the motor by efficiently utilizing the connecting wire layout space, and also enhances stability by reducing external exposure.

[0064] It includes a terminal provided in the controller and a connection part coupled to the terminal, and the final line of each series-connected winding is connected to the connection part. This increases assembly efficiency by making the connection between the final line of the winding and the control module more direct and simple.

[0065] The connecting portion includes a first connecting portion to which the terminal is connected, a second connecting portion to which the final line of the winding coil connecting wire is connected, and an intermediate portion provided between them. The first connecting portion includes a first slit for inserting the terminal, and the second connecting portion includes a second connecting branch that elastically deforms according to the insertion of the final line of the winding coil connecting wire and holds the final line. This structure enables a strong electrical and mechanical connection between the final line of the winding coil connecting wire and the terminal, thereby improving connection reliability.

[0066] When the final line of the winding coil connection wire is inserted into the second slot, the coating or covering provided on the final line is stripped or removed by the end of the second connection branch. This automatically establishes a continuity state without a separate covering removal process, thereby simplifying the manufacturing process and increasing productivity.

[0067] A groove is formed adjacent to the second slit in the main body and into which the final line of the winding coil connection wire is secured or positioned adjacent to the final line. This groove facilitates stable insertion and fixation of the final line, further enhancing assembly convenience and connection stability.

[0068] The stator comprises 12 slots, and the rotor comprises a rotor core and 10 magnets mounted on the rotor core, resulting in a 10-pole, 12-slot design. This optimizes the efficiency and performance of the BLDC motor through a specific combination of poles and slots, thereby enhancing the driving force of the electric oil pump.

[0069] The connectors can be configured with three or four connectors. Flexibly adjusting the number of connectors increases product design freedom and allows for the selection of an efficient connection method based on the specifications and requirements of the applicable motor.

[0070] When there are four connections, the final and common lines of the U-phase, V-phase, and W-phase windings are connected to each connection. This clearly distinguishes the connections for each phase from the common line, ensuring ease of wiring and system stability.

[0071] When three connections are present, one of the three connections is configured as a double connection, while the remaining two are single connections. The double connection connects two of the final leads of the U, V, and W phase windings, while the remaining single connections connect the common line and the final leads of the remaining phases not connected to the double connection. This double connection configuration effectively prevents wiring errors with the common line and increases space efficiency, reducing overall wiring density.

[0072]

[0073]

[0074] Figure 1 is a perspective view of the present invention.

[0075] Figure 2 is a rear perspective view of the present invention.

[0076] Figure 3 is an exploded perspective view of the present invention.

[0077] Figures 4 to 8 are flow diagrams of oil introduced and discharged in the present invention.

[0078] Figure 9(a) is a perspective view of the control housing of the present invention.

[0079] Figure 9(b) is a perspective view of the control housing of the present invention.

[0080] Figure 10 is an enlarged perspective view showing the arrangement of the temperature sensor unit of the present invention.

[0081] Figure 11 is a cross-sectional view showing the arrangement of the temperature sensor unit of the present invention.

[0082] Figure 12 is an exploded perspective view of the combination of the control housing, control board, and control housing cover of the present invention.

[0083] Figure 13 is an exploded perspective view of the control housing and control board of the present invention.

[0084] Figure 14 is a perspective view of the combination of the control board and gasket of the present invention.

[0085] Figure 15 is a front view and a perspective view of the gasket of the present invention.

[0086] Figure 16 is a cross-sectional view of the combined state of the gasket and control housing, control board, and housing of the present invention.

[0087] Figure 17 is an exploded perspective view and a bottom perspective view of the pump cover of the present invention.

[0088] Figure 18 is a cross-sectional view of the present invention.

[0089] Figure 19 is an enlarged cross-sectional view of the double journal bearing of the present invention.

[0090] Figure 20 is an enlarged perspective view of the inside of the pump chamber and the pump rotor of the present invention.

[0091] Figure 21 is a perspective view of the inside of the pump chamber of the present invention.

[0092] Figure 22(a) is a perspective view of the inside of the pump chamber of the present invention.

[0093] Figure 22(b) is a perspective view of the inside of the motor chamber of the present invention.

[0094] Figure 23 is a perspective view showing the combined state of the motor and control housing of the present invention.

[0095] Figure 24 is an exploded perspective view of the motor of the present invention.

[0096] Figure 25(a) is a diagram showing the arrangement of coil windings for each phase in the stator of the present invention.

[0097] Figure 25(b) is a connection diagram of the coil windings of each phase using a busbar.

[0098] Figure 25(c) is a connection diagram of coil windings for each phase in the stator of the present invention.

[0099] Figure 26 illustrates a state in which a connection part is connected to the final end of the connection line of each phase coil winding of the motor in the present invention.

[0100] Figure 27(a) is a front view of a single connecting part in the present invention.

[0101] Figure 27(b) is a front view showing a state in which the final end and second terminal of the coil winding connection line are connected to a single connection part in the present invention.

[0102] Figure 27(c) is a front view of a double connection part in the present invention.

[0103] Figure 28 is a perspective view showing a state in which a control housing and a motor are connected using a connecting portion in the present invention, and an enlarged perspective view of the connecting portion.

[0104] The present invention can have various modifications and embodiments, and specific embodiments are illustrated and described in the drawings.

[0105] However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0106] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms.

[0107] The above terms are used solely to distinguish one component from another.

[0108] For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

[0109] The term and / or includes any combination of a plurality of related described items or any one of a plurality of related described items.

[0110] When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0111] On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0112] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the present invention.

[0113] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0114] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0115] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or corresponding components are given the same reference numbers, and redundant descriptions thereof will be omitted.

[0116] Figure 1 is a front perspective view of an electric oil pump (1) according to the present invention. However, the present invention is not limited to an electric oil pump, and can be applied to any electric device that includes a motor, a rotating body (rotor), and a shaft connecting them.

[0117] As shown in Fig. 1, a housing (100) including a wall (2) forms the exterior, a pump chamber (110) for accommodating a pump is provided on the upper part of the housing (100), and a pump cover (120) is coupled to the upper part of the pump chamber (110).

[0118] A fastening member (120a) is provided at a plurality of points on the outer surface of the pump cover (120) to connect the pump cover (120) to the pump chamber (110).

[0119] A motor chamber (130) is provided below the pump chamber (110) to accommodate the motor unit (M), and a lower chamber (140) is provided below the motor chamber (130).

[0120] That is, the housing (100) roughly includes a pump chamber (110), a motor chamber (130), a lower chamber (140), and a wall (2).

[0121] A control housing (150) is provided in the lower chamber (140) to accommodate a control board (not shown), a control housing cover (170) is installed on one side of the control housing (150), a first terminal (not shown) is extended and arranged on one side of the control housing (150), and the first terminal (not shown) is arranged inside a terminal housing (160) connected to the control housing (150).

[0122] Figure 2 is a rear perspective view of the present invention.

[0123] An oil suction port (10a) and an oil discharge port (20a) are provided on the wall (2) of the housing (100). A suction path is provided between the oil suction port (10a) and the pump chamber (110).

[0124] An opening sealing member (10c) is provided on the pump housing wall (2) to block an opening (10b) that occurs when machining the suction path.

[0125] The opening sealing member (10c) is positioned above the oil suction port (10a). In addition, a number of installation holes are formed in the wall (2) for mounting it to other parts.

[0126] A gasket (20b) is placed in the oil discharge port (20a) of the pump housing wall (2).

[0127] Figure 3 is an exploded perspective view of an electric oil pump (1) according to the present invention.

[0128] The pump chamber (or rotating chamber) (110) of the housing (100) includes a pump rotor (or rotating body) (310) that is implemented in a gear shape and rotates in combination with a shaft (330), and a pump ring (320) that surrounds the pump rotor (310) and has internal teeth corresponding to the external teeth of the pump rotor (310) and forms a pumping space together with the pump rotor (310).

[0129] The pump cover (120) is placed over the pump chamber (110), and a sealing ring (129) is provided at the bottom thereof.

[0130] The shaft (300) is pressed into the pump rotor (or rotating body) (310) and is arranged in the vertical direction.

[0131] A motor unit (400) is coupled to the lower part of the shaft (300), and in particular, it is coupled to the rotor (410) of the motor unit (400), and a stator (420) is provided around the rotor (410) of the motor unit.

[0132] The connecting line (winding final stage) provided in the motor section (400) is connected to the control board (180) by a connecting section (not shown) as described later. The connection structure will be described in detail later.

[0133] A control housing (150) is provided at the bottom of the motor section (400), a control board (180) is provided at the bottom of the control board housing (150), and a control housing cover (170) is provided at the bottom of the control board (180).

[0134] A protrusion (152) that protrudes upward is provided on the upper part of the control housing (150), and a sealing member (153) is provided on the outer edge of the protrusion (152). It is preferable that the sealing member (153) is provided on the outer surface of the protrusion (152) and the inner surface of the housing (100).

[0135] Therefore, when the protrusion (152) is inserted into and joined to the housing (particularly the lower housing (140)) (100), the sealing member (153) maintains airtightness, preventing oil leakage and foreign substances from entering.

[0136] In particular, some of the pumped oil flows into the motor chamber (400) to cool the motor (400), and the sealing member (153) prevents the oil from leaking out.

[0137] Meanwhile, a temperature sensor unit (600) is provided in the control housing (150).

[0138] The temperature sensor unit (600) includes a sensor unit (610) and a pin-shaped connecting leg (620) connected to the lower end of the sensor unit (610). The connecting leg (620) transmits the temperature information of the oil recognized by the sensor unit (610) to the control board (180). The temperature information of the oil can be transmitted from the control board (180) to the ECU (not shown), and accordingly, control information of the motor (400) can be received from the ECU.

[0139] A tube-shaped temperature sensor unit installation part (151) is provided in the control housing (150), a sensor terminal (620) is inserted therein, and a sensor element (610) is installed so as to be exposed to the outside of the temperature sensor unit installation part (151), thereby enabling measurement of the temperature of oil on the suction port or suction path.

[0140] As illustrated in FIGS. 5 to 8, the suction path (10) includes a first suction path (11) connected to the suction port (10a) and arranged in a first direction, a second suction path (12) connected to the first suction path (11) and arranged in a second direction, and a third suction path (13) connected to the second suction path (12), connected to the pump chamber, and arranged in a third direction.

[0141] In Figures 5 to 8, the dotted arrows indicate the flow of oil being sucked from the oil suction port (10a) to the suction port (111) provided in the pump chamber (110).

[0142] And, the solid arrow in Fig. 8 shows the flow of oil flowing out from the discharge port (112) of the pump chamber (110) to the oil discharge port (20a).

[0143] Part of the temperature sensor unit (600) is preferably positioned on the first suction path (11) or the second suction path (12), and is preferably located in a space communicating with the suction port (10a). However, the location is not limited thereto, and it may be installed anywhere on the suction path (10) before it is introduced into the pump chamber (110).

[0144] One of the main features of the present invention is that a temperature sensor unit (600) for measuring the temperature of oil is placed on the suction path (10) or suction port (10a) to measure the temperature of the oil before it flows into the pump chamber (110).

[0145] Accordingly, it is designed to detect the temperature of the oil flowing into the pump chamber (110) in real time and control the flow rate of the oil so as to maintain a constant temperature or control the temperature as needed.

[0146] This structure greatly helps to optimize the performance of the oil pump in systems sensitive to oil temperature changes and provides long-term stability.

[0147] In particular, since the temperature data of the oil is continuously monitored through the temperature sensor unit (600), the working conditions of the oil pump system can be accurately analyzed and managed.

[0148] The arrangement of these temperature sensor units (600) increases the operating efficiency of the system and enables continuous safe operation of the system by preventing damage due to potential overheating or temperature fluctuations.

[0149] As described above, the suction passage (10) is directly connected to the suction port (10a) as a whole and includes a first suction passage (11) arranged in a first direction, a second suction passage (12) arranged in a second direction while being connected to the first suction passage (11), and a third suction passage (13) arranged in a third direction while being connected to the second suction passage (12) and coupled to the pump chamber (110).

[0150] At least a portion of the temperature sensor unit (600) is positioned on the second suction passage (12) and faces the outlet of the first suction passage (11). This feature is designed to efficiently detect the temperature of the oil flow. This configuration contributes to optimizing the performance of the oil pump and enhancing the stability of the system.

[0151] The second suction passage (12) is formed to be long in the vertical direction, the first suction passage (11) is connected next to the lower region of the second suction passage (12), the third suction passage (13) is connected to a suitable portion (e.g., the upper portion) of the third suction passage (13), and the third suction passage (13) is connected to the suction port (111) of the pump chamber (110).

[0152] A temperature sensor unit installation part (151) is installed at the lower end of the second suction duct (12), and a temperature sensor unit (600) is installed therein, and in particular, the sensor part (610) is exposed above it.

[0153] As illustrated in FIGS. 10 and 11, the temperature sensor unit (600) has the following components. The sensor section (610) is exposed above the temperature sensor unit installation section (151), and the connection leg (620) extends downward and is connected to the control board (180).

[0154] Meanwhile, in a state where the sensor unit (610) is installed in the temperature sensor unit installation unit (151), a sealing unit (642) is installed inside the temperature sensor unit installation unit (151) to prevent oil from the oil path from penetrating toward the control board. For example, the sealing process can be performed using silicone potting, etc.

[0155] Accordingly, the sealing unit (62) can fill the inside of the temperature sensor unit installation part (151) while the part formed in the shape of the letter “Y” of the connecting leg (620) and the lower part of the sensor part (610) are accommodated inside the sealing unit (642).

[0156] Meanwhile, a sealing member (641) is provided on the outer surface of the temperature sensor unit installation part (151) to prevent oil leakage or foreign matter from entering.

[0157] As illustrated in FIGS. 12 and 13, the terminal includes a first terminal (510) formed integrally with the terminal housing (160) and bent in a 'ㄷ' shape, and a second terminal (520) formed integrally with the control housing (150) and arranged in an 'I' shape.

[0158] The first terminal (510) connects an external device and the control board (180), and the second terminal (520) connects the motor (400) and the control board (180). To this end, a first connection hole (181) is provided on one side of the control board (180), into which the end of the first terminal (510) is inserted and connected (by fitting or soldering, etc.).

[0159] Additionally, a second connection hole (182) is provided on the other side of the control board (180), into which the end of the second terminal (520) is inserted and connected (fitting or soldering, etc.).

[0160] Meanwhile, a third connection hole (183) is also provided in the control board (180) into which a connection leg (620) of a temperature sensor unit (600) can be inserted and connected (by fitting or soldering, etc.).

[0161] The control board (180) controls the motor unit (400) and further provides a function for measuring the temperature of the oil on the pump suction side. Through this, the control board (180) efficiently manages the operating status of the motor and continuously monitors the temperature of the oil, thereby ensuring stable operation of the system.

[0162] In particular, the performance and durability of the oil pump (1) are improved by optimizing the operating conditions of the motor unit (400) based on temperature data collected through the temperature sensor unit (600). This enables integrated control and monitoring of the entire system, enabling stable and efficient operation of the oil pump even under various environmental conditions.

[0163] To this end, a control unit and a communication unit, which are specifically provided in the form of elements, are provided on the control board (180). The communication unit is responsible for transmitting oil temperature information and pump operation status information to an external engine control unit (ECU), and the control unit executes a command transmitted from the ECU, i.e., a command issued based on oil temperature information and pump operation status.

[0164] This optimizes the performance of the electric oil pump by controlling the motor's rotational speed and the resulting pump operation. This enhances pump efficiency through appropriate oil temperature management and allows the ECU to monitor and control the pump's operating status as needed.

[0165] The interaction between the communication unit and the control unit allows the present invention to control the operation of the electric oil pump more precisely and quickly.

[0166] Figures 13 to 16 illustrate the sealing state by the gasket (190) when the gasket (190) is installed around the control board (180).

[0167] As illustrated in Fig. 15, a gasket (190) is placed around the edge of the control board (180), and a gasket (190) is placed between the control housing cover (170) and the control housing (150).

[0168] The gasket (190) is designed primarily to prevent fluid or foreign matter from entering the control housing (150) and secondarily to press the edge of the control board (180) to secure the control board (180) in place.

[0169] A through hole (155) is provided in the corner portion of the control housing (150) through which a fastening member (175) such as a screw passes, and a through hole support member (155a) that supports the through hole (155) is provided in the shape of a flesh around the through hole (155).

[0170] The gasket (190) is provided in a closed curve shape and is arranged on the inside of each side of the control housing (150) and the inside of the through-hole support (115), and the control board (180) is arranged inside the gasket (190). A bend (193) is provided at the corner of the gasket (190), and a fixed damper (192) is provided at the bend (193).

[0171] The bending portion (193) is formed to correspond to the shape of the inner peripheral edge of the through-hole support portion (155a). Accordingly, the bending portion (193) is formed concavely from the outside to the inside of the gasket (190), and it is preferable that the bending portion (193) be formed in a fan-like or arc-like shape on the inside, but the shape is not limited thereto.

[0172] The fixed damper (192) serves to fix the control board (180) by covering the corner edge of the control board (180) from below. To this end, one side of the body (edge) of the gasket (190) and one side of the fixed damper (192) are arranged on the same plane, and the other side of the body (edge) of the gasket and the other side of the fixed damper (192) are provided in a stepped form.

[0173] The corner of the control board (180) is positioned at the same height as the step and is supported by being covered or pressed by the fixed damper (192).

[0174] The thin fixed damper (192) allows for easy installation of the control board (180) during assembly without significantly increasing the volume of the gasket (190) and prevents interference with other components of the control housing (150).

[0175] At least one of the front or rear surfaces of the fixed damper (192) is provided with a concave area (192a), which can serve to reduce material costs while providing a spatial margin for deformation when the fixed damper (192) is in close contact with the circuit board and elastically deforms.

[0176] A plurality of fixing protrusions (191a) are provided on either the inner or outer surface of the gasket (190) to press against the inner wall surface of the control housing (150) or the outer wall surface of the control board (180) and fix the position of the gasket. A plurality of fixing protrusions (191a) are arranged spaced apart from each other along the outer or inner wall surface of the gasket (190).

[0177] A fixed damper (192) is provided at a corner or edge portion of the control board (180), and the corner or edge of the circuit board is placed in the step area by the fixed damper (192) of the gasket (190).

[0178] In this state, when the control housing cover (170) is covered, the gasket (190) is subjected to pressure by the pressure of the control housing cover (170), and the gasket (190) is compressed while being elastically deformed by this pressure.

[0179] In particular, the position of the PCB can be fixed because the fixed damper (192) is elastically deformed and the portion of the fixed damper (192) that is in close contact with the control board (180) presses the control board (180).

[0180] Furthermore, since the fixed projection (191a) provided on the gasket (190) is subject to frictional contact and elastic deformation, a structure can be implemented in which the inner wall surface of the control housing (150) and the outer wall surface of the control board (180) are connected to each other through the fixed projection (191a) of the gasket.

[0181] As illustrated in Fig. 17, a pump chamber (110) of a housing (100) is provided with a pump rotor (310) that is implemented in a gear shape and rotates in combination with a shaft (300), and a pump ring (320) that surrounds the pump rotor (310) and has internal teeth corresponding to the external teeth of the pump rotor (310) and forms a pumping space together with the pump rotor (310).

[0182] And, a pump cover (120) is provided on the upper part of the pump chamber (110).

[0183] The pump cover (120) includes a cover center hole (121) provided at the center of the pump cover (120) into which the end of the shaft (330) is inserted, a first space portion (122) in the shape of an arc or a folded shape and a second space portion (123) arranged to face each other with the cover center hole (121) as the center.

[0184] Here, the cover insertion hole (121) acts as a buffer or damper space, and by partially filling this part with oil, it can help the smooth rotational movement of the shaft (330).

[0185] The first space (122) is positioned above the suction area of ​​the pump, and the second space (123) is positioned above the discharge area of ​​the pump. The first and second spaces (122, 123) serve as oil pockets, and by accommodating a portion of oil therein, they assist in the smooth rotation of the pump rotor (310), prevent wear, and also have the effect of improving pressure pulsation.

[0186] The first space (122) and the second space (123) are formed so that their widths increase from one side to the other, but an inwardly protruding projection (122a) is provided at the end of the first space (122) that becomes the wide area, thereby dividing the end of the wide area.

[0187] This is formed to match the shape of the suction port (113) at the bottom of the pump chamber (110), and by forming this divided shape, uniform distribution and efficient compression of oil in the oil compression space (the space between the outer teeth of the rotor and the inner teeth of the pump ring) and reduction of pulsation can be achieved.

[0188] As illustrated in FIGS. 18 to 23, a partition wall (103) is provided to partition a pump chamber (110) and a motor chamber (130). In addition, a first journal bearing (101) extending from one side (upper side in FIG. 18) of the partition wall (103) and supporting a shaft (330), and a second journal bearing (102) extending from the other side (lower side in FIG. 18) of the partition wall (103) and extending in the opposite direction to the first journal bearing (101) and supporting a shaft (330) are further provided.

[0189] The first journal bearing (101) is provided in a stepped form including a large diameter portion (101a) and a small diameter portion (101b) extending from the large diameter portion (101a), and as shown in Fig. 19, an inner diameter space (311) is provided inwardly so that the small diameter portion (101b) is inserted and supported at the lower center of the pump rotor (or rotating body) (310).

[0190] Accordingly, when the inner diameter space (311) of the pump pump rotor (310) is placed on the small diameter portion (101b), the small diameter portion (101b) is inserted therein, and the lower surface of the pump pump rotor (310) can be placed on the bottom surface (or upper surface) of the large diameter portion (101a) and supported.

[0191] A bottom passage (106) is formed on the bottom of the pump chamber (110). In addition, a guide passage (1010) is formed on a portion of the surface of the first journal bearing (101), particularly the small diameter portion (101a), and is connected to the bottom passage (106) to guide oil into the journal bearings (101, 102).

[0192] The guide passage (1010) includes a first guide passage (1011) formed along the vertical longitudinal direction on the outer surface of the small diameter portion (101a) of the first journal bearing (101) and communicating with the bottom passage (106), a second guide passage (1012) formed on the upper portion of the small diameter portion (101a) of the first journal bearing (101) and connected to the first guide passage (1011), and a third guide passage (1013) formed along the vertical longitudinal direction on the inner surface of the small diameter portion (101a) of the first journal bearing (101) and communicating with the second guide passage (1012).

[0193] In particular, the second guide passage (1012) is formed diagonally at the upper portion of the small diameter portion (101a) of the first journal bearing (101), and this is arranged along the rotational direction of the pump rotor (310) so that when the pump rotor (310) rotates, the oil can smoothly move in the order of bottom passage (106) -> first guide passage (1011) -> second guide passage (1012) -> third guide passage (1013).

[0194] Meanwhile, the upper region (330a) of the shaft (330) is positioned in the pump chamber (110) and is provided in a hollow shape, the middle region (330b) of the shaft (330) is positioned in the journal bearing (101, 102) and is provided in a solid shape, and the lower region of the shaft (330) is positioned in the motor chamber (130) and is provided in a solid shape.

[0195] By providing the upper region (330a) of the shaft (330) in a hollow shape, oil can move along the guide path (1010) to that part to be filled with oil, and the filled oil can move to the cover center hole (121) at the center of the pump cover (120).

[0196] The cover center hole (121) acts as a buffer or damper space due to the moved oil, and by partially filling this part with oil, it can help the smooth rotational movement of the shaft (330).

[0197] As illustrated in Fig. 19, the overall height of the journal bearing by the first journal bearing (101), the second journal bearing (102), and the partition wall (103) is indicated by H. The small diameter portion (101b) of the first journal bearing (101) rises further, thereby increasing the height of the journal bearing, and thereby increasing the area supporting the shaft (330), so that the shaft can stably maintain a vertical state without becoming eccentric or tilted.

[0198] Reducing the amount of shaft tilt improves the overall efficiency of the oil pump because it reduces pump leakage, which allows for increased flow rate, and also reduces rotor and stator gap variation, which minimizes compensation control and reduces current consumption.

[0199] The journal bearing of the present invention can be widely applied not only to electric oil pumps but also to electric components (e.g., pumps, actuators) that utilize a rotating shaft.

[0200] Figure 23 illustrates a state in which a motor (400) and a control housing (150) according to the present invention are combined, and Figure 24 is an exploded perspective view. The control housing (150) comprises a controller including a control board (180) housed therein.

[0201] The motor (400) is implemented as a BLCD motor.

[0202] The motor (400) includes a rotor (410) and a stator (420). The rotor (410) includes a rotor core (411) having a shaft hole formed in the center, and a plurality of magnets (412) arranged along the outer periphery of the rotor core (411). Each magnet is arranged alternately with a different pole. In the present invention, 10 magnets are used as an example, but the present invention is not limited thereto.

[0203] The stator (420) includes a stator core (4200), a first insulator (4210) and a second insulator (4220) that are coupled from above and below the stator core (4200), a plurality of windings (4240) wound on the outer surface of the first and second insulators (4210, 4220) arranged on the tooth shape of the stator core (4200), and a connecting line (4250) that connects the plurality of windings (4240) in series for each phase (U phase, V phase, W phase).

[0204] The stator core (4200) is provided with a plurality of teeth (4201) arranged in a T shape on the inside, and slots (4202) are provided between the teeth. In addition, a yoke (4203) is provided in a circular shape at the back of the teeth to form a magnetic circuit.

[0205] The first and second insulators (4210, 4220) are provided with tooth-shaped receiving portions (4211, 4221), and a yoke receiving portion (4212, 4222) is provided on the outside thereof.

[0206] In the present invention, winding coils of the same phase (U: U1 to U4, V: V1 to V4, W: W1 to W4) are connected in series with each other, and the final line of each winding coil connected in series is connected to a control module, one for each phase.

[0207] BLDC motors are typically connected in a Y or delta configuration. In the present invention, each phase is connected in series, ultimately resulting in three phase lines and a common line, which is a variation of the Y configuration (star connection).

[0208] In the case of a Y connection, one end of the three phases (U, V, W) comes together at a common point (neutral point), and the other ends come out as individual phase lines. Connecting multiple U, V, and W phases in series means that each phase consists of multiple coils, which are connected in series. This is implemented with three phase lines and one common line.

[0209] The connecting wires (4250) that connect the windings of the same phase in series are arranged inside and outside the second insulator (4212) that constitutes the stator (420) and are provided in a form that surrounds at least a part of the second insulator (4212).

[0210] In the present invention, 12 winding coils (4240) are arranged in a stator (420) as shown in Fig. 25(a), and each phase is arranged in order, and the order is repeated.

[0211] Here, the short dotted rectangle indicates phase U (4240U), the long dotted rectangle indicates phase V (4240V), and the solid rectangle indicates phase W (4240U).

[0212] In the case of the prior art, as shown in Fig. 25(b), a structure was provided in which coils of the same phase for each slot are connected to each other using a busbar and a winding coil wire, seven connectors (C) connected to the coils are provided, and after the seven connectors (C) are connected to the busbars (B1, B2, B3), the terminals of the busbars are connected to the controller.

[0213] However, in the case of the present invention, as shown in Fig. 25(c), the busbar is omitted, and the three final lines of each phase winding coil (1 U phase, 1 V phase, 1 W phase; 4250U, 4250V, 4250W) and one common line are connected to the controller.

[0214] Each of the three final lines and one common line of each winding coil is connected to the second terminal (520) by four connecting parts (500).

[0215] Looking at the specific arrangement structure, four second terminals (see Fig. 13, 520) are arranged in an arc shape at an angle of, for example, 120 degrees in the control housing (150), and the lower end thereof protrudes and is connected to the second connection hole (182) of the control board (170).

[0216] In addition, the second terminal (520) is positioned to protrude upward from the control housing (150) (see Fig. 9(b)). The second terminal (520) protruding upward provides a separate, easy-to-assemble, small-sized connection part (5000) rather than a busbar form for connecting the final end of the connection line of each phase's winding coil and the common line.

[0217] As illustrated in FIGS. 26 and 28, the connecting portion (5000) includes a first connecting portion (5100) to which a second terminal (520) is connected, a second connecting portion (5200) to which a final line (4250: 4250U, 4250V, 4250W) or a common line (COM) of a winding coil is connected, and an intermediate portion (5300) provided between the first connecting portion (5100) and the second connecting portion (5200).

[0218] The first connecting portion (5100) includes two first connecting branches (5110) spaced apart from each other and a first slit (5120) provided between the first connecting branches (5110) into which a first terminal (520) is inserted.

[0219] The first slit (5210) has a shape in which its width becomes narrower from the bottom to the top and then widens again. Meanwhile, an I-shaped groove (5111) is formed to provide elasticity for easy deformation (opening) of the first connection branch (5110) and the first slit (5210) and to improve adhesion when the first terminal (520) is inserted.

[0220] The second connecting portion (5200) is provided so as to face each other closely or forms a second slit (5220) that is narrower than the first slit (5120), and includes a second connecting branch (5210) that elastically deforms according to the insertion of the final line (4250) of the winding and holds the final line (4250) of the winding.

[0221] The gap between the second connecting branches (5210) facing each other becomes narrower from top to bottom, and the narrowest part is either facing each other or is slightly spaced apart.

[0222] Meanwhile, a diagonal groove (5211) is provided on both sides of the second connecting branch (5210). This groove (5211) is provided to provide a gap so that the second connecting branch (5210) can be opened to both sides when the final line (4250) of the winding is inserted.

[0223] The edge of the second connecting branch (5210) is formed sharply so that when the final line (4250) of the winding is inserted into the second slot (5220), the coating or covering provided on the final line (4250) of the winding is peeled off or removed by the end of the second connecting branch (5210), thereby enabling current to flow.

[0224] Meanwhile, in the middle part (53000), a groove (5310) is formed adjacent to the second slit (5220) and in which the final line (4250) of the winding is settled or is arranged adjacent to the final line (4250) of the winding.

[0225] The number of winding coils (4240) of the present invention is the same as the number of slots (4203) of the stator, and the slots (4203) refer to the entire recessed portion in which the winding coils (4240) are inserted in the stator core (4200), beyond simply the space in which the winding coils (4240) are wound, and mean the space in which the winding coils (4211) can be placed within the stator core (400).

[0226] By this structure, the stator (420) of the present invention includes 12 slots, and the rotor (410) includes a rotor core (411) and 10 magnets (412) installed in the rotor core (411), so that 10 poles and 12 slots can be implemented.

[0227] Meanwhile, although the present invention has been described as having four connecting parts (5000), the connecting parts may be implemented with three.

[0228] In the case of four connections (5000), the final line of the U-phase winding (4250U), the final line of the V-phase winding (4250V), the final line of the W-phase winding (4250W), and the common line (COM) are connected to each connection.

[0229] In the case of three connections, one of the three connections is configured as a double connection (5000') and the remaining two are connected as single connections (5000).

[0230] A double connection (5000') is a form in which two single connections (5000) are connected by a bridge (5500).

[0231] The double connection (5000') is connected to one of the final line (4250U) of the U-phase winding, the final line (4250V) of the V-phase winding, and the final line (4250W) of the W-phase winding, as well as the common line (COM). In addition, the final lines of the remaining phases that are not connected to the double connection are connected to the remaining two single connections (5000).

[0232] For example, the reason why the common line (COM) and U-phase line are installed in the double connection and the remaining two phase lines (phase lines of V and W) are respectively connected to the two single connection lines is as follows.

[0233] The common line (COM) must always be connected with other common lines. By placing the common line in a double connector (5000'), two lines can be conveniently connected with a single connector (5000').

[0234] There is also the advantage of preventing wiring errors. If only two phases (e.g., U, V) are connected to a dual connection (5000') and the common line (COM) is connected to a separate single connection (5000), there is a risk of the motor malfunctioning or being damaged when the common line (COM) is not connected. The common line (COM) is important because it is the reference point that supplies power to all phases of the motor.

[0235] Additionally, space efficiency can be improved by bundling two core lines (common line and one phase line) into one double connection (5000') instead of four lines into three connectors, thereby reducing overall wiring density.

[0236] In addition, it has the advantage of simplifying assembly between the controller and the motor by providing a connection part that can easily connect wiring or terminals, and easily connecting the controller with the second terminal installed while the connection part is connected to the motor.

[0237] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is only for the purpose of explaining the invention, and a person having ordinary skill in the art to which the present invention pertains will be able to understand that various modifications or equivalent embodiments are possible from the detailed description of the invention.

[0238] Therefore, the true scope of the present invention should be determined by the technical idea of ​​the patent claims.

Claims

1. An oil suction port provided in the housing; A pump chamber provided in the housing; A suction path connecting the pump chamber and the suction port; An electric oil pump characterized by including a temperature sensor unit disposed on a suction port or suction passage to measure the temperature of oil before it flows into the pump chamber.

2. In paragraph 1, A control housing is further provided on one side of the housing, and includes a control housing in which a control board is accommodated. The control housing is provided with a temperature sensor unit installation portion in which a temperature sensor unit is installed, and the temperature sensor unit installed in the temperature sensor unit installation portion; An electric oil pump characterized by comprising a sensor portion exposed on a suction port or suction duct; and a connecting leg connecting the sensor portion to a control board.

3. In paragraph 2, An electric oil pump characterized in that a sealing unit is provided in a temperature sensor unit installation section that surrounds at least a portion of the connection leg of the temperature sensor unit and seals the space.

4. In paragraph 1, A housing in which a pump chamber and a motor chamber are provided, A control housing is disposed on one side of the housing and includes a control housing in which a control board is accommodated. One side of the control housing further includes a protrusion arranged to face the motor chamber, An electric oil pump characterized in that a protrusion is inserted into a housing and a sealing member is provided between the protrusion and the housing to provide airtight performance.

5. In paragraph 1, A housing in which a pump chamber and a motor chamber are provided, A control housing which is arranged on one side of the housing and houses the control board, A gasket surrounding the circuit board and installed inside the control housing; Including a control housing cover that pressurizes the gasket while covering the opening of the control housing, An electric oil pump characterized in that the gasket is provided with a fixed damper that pressurizes and fixes the circuit board while making contact with or covering at least a portion of the control board.

6. In paragraph 5, A bend is provided at the corner of the above gasket, An electric oil pump characterized in that the above fixed damper is provided in a fan-shaped or arc-shaped shape on the inside of the bending portion.

7. In paragraph 1, A motor chamber in which the motor is placed; A partition wall dividing the pump chamber and the motor chamber; A first journal bearing extending from one side of the partition wall and supporting the shaft; An electric oil pump characterized in that it further includes a second journal bearing extending from the other side of the partition wall and extending in a direction opposite to the first journal bearing and supporting the shaft.

8. In paragraph 7, The first journal bearing; It is provided in a stepped form, including a large diameter and a small diameter extending from the large diameter. An electric oil pump characterized in that an inner diameter space is formed inwardly so that a small diameter part is inserted and supported at the lower center of the pump rotor.

9. In paragraph 7, A bottom channel formed at the bottom of the pump chamber; An electric oil pump characterized by including a guide passage formed on a portion of the surface of a first journal bearing, connected to a bottom passage, and guiding oil into the inside of the journal bearing.

10. In paragraph 9, The guide passage is formed along the vertical longitudinal direction on the outer surface of the first journal bearing and is connected to the bottom passage; A second guide passage connected to the first guide passage and formed on the upper part of the first journal bearing; An electric oil pump characterized by including a third guide passage formed along the vertical longitudinal direction on the inner surface of a first journal bearing and communicating with a second guide passage.

11. In paragraph 10, In the fourth paragraph, An electric oil pump characterized in that the second guide euro is formed in a diagonal shape at the upper portion of the first journal bearing.

12. In paragraph 7, Further comprising a pump cover covering the pump chamber, Including a first space portion and a second space portion which are arranged to face each other based on the center of the pump cover, The first space section is placed above the suction area of ​​the pump, An electric oil pump characterized in that the second space is arranged above the discharge area of ​​the pump.

13. In paragraph 12, The first space and the second space are formed so that their width increases from one side to the other. An electric oil pump characterized in that the end portion of the first space section having a wide area is divided by providing a protrusion protruding inwardly.

14. In paragraph 7, The upper area of ​​the shaft is located in the pump chamber, but is provided in a hollow form, The middle area of ​​the shaft is located in the journal bearing, but is provided in a solid form. An electric oil pump characterized in that the lower region of the shaft is located in the motor chamber and is provided in a solid form.

15. In paragraph 1, Pump and; A motor connected to a shaft connected to a pump, A control module including a substrate, wherein the motor is composed of a rotor and a stator; An electric oil pump characterized in that the stator includes three-phase windings of U phase, V phase, and W phase, and the windings of each phase are provided in multiple numbers, but the windings of each same phase are connected in series with each other, and the final line of each series-connected winding is connected to a control module, one for each phase.

16. In paragraph 15, An electric oil pump characterized in that the connecting wires connecting the windings of the same phase in series are arranged inside and outside the insulator constituting the stator and are provided in a form that surrounds at least a portion of the insulator.

17. In paragraph 15, An electric oil pump comprising a terminal provided in a control module and a connection part coupled to the terminal, wherein the final line of each series-connected winding is respectively connected to the connection part.

18. In paragraph 17, The above connecting part is a first connecting part to which a terminal is connected; A second connecting part to which the final line of the connecting line of the coil winding is connected, Including an intermediate portion provided between the first connecting portion and the second connecting portion, The first connecting portion includes two first connecting branches spaced apart from each other and a first slit provided between the first connecting branches into which a terminal is inserted, An electric oil pump characterized in that the second connecting portion is provided so as to face each other closely or forms a second slit narrower than the first slit, and includes a second connecting branch that holds the final line of the winding while being elastically deformed according to the insertion of the final line of the winding.

19. In paragraph 18, An electric oil pump characterized in that when the final line of the winding is inserted into the second slot, the coating or covering provided on the final line of the winding is peeled off or removed by the end of the second connecting branch.

20. In paragraph 18, An electric oil pump characterized in that a groove is formed in the middle part adjacent to the second silt and in which the final line of the winding is settled or is arranged adjacent to the final line of the winding.

21. In paragraph 18, The stator contains 12 slots, The rotor comprises a rotor core and ten magnets installed in the rotor core. An electric oil pump characterized by the implementation of 10 poles and 12 slots.

22. In paragraph 21, An electric oil pump characterized in that the above connecting parts are composed of three or four.

23. In paragraph 22, An electric oil pump characterized in that, when there are four connections, the final line of the U-phase winding, the final line of the V-phase winding, the final line of the W-phase winding, and the common line are each connected to each connection.

24. In paragraph 22, If there are three connections, one of the three connections is configured as a double connection and the other two are connected as single connections. An electric oil pump characterized in that two of the final lines of the U-phase winding, the final line of the V-phase winding, and the final line of the W-phase winding are connected to the double connection, and the common line and the final lines of the remaining phases that are not connected to the double connection are connected to the remaining single connection.

25. A rotating chamber in which a rotating body is placed; A rotating chamber in which a motor is placed; A partition wall dividing the rotating chamber and the motor chamber; A first journal bearing extending from one side of the partition wall and supporting the shaft; A power transmission device characterized by including a second journal bearing extending from the other side of the partition wall and extending opposite the first journal bearing and supporting the shaft.

26. In paragraph 25, The first journal bearing; It is provided in a stepped form, including a large diameter and a small diameter extending from the large diameter. A power transmission device characterized in that an inner diameter space is formed inwardly so that a small diameter part is inserted and supported at the lower center of the rotating body.

27. In paragraph 25, A bottom channel formed on the bottom of the rotating chamber; A power transmission device characterized by including a guide passage formed on a portion of the surface of a first journal bearing, connected to a bottom passage, and guiding oil into the inside of the journal bearing.

28. In paragraph 27, The guide passage is formed along the vertical longitudinal direction on the outer surface of the first journal bearing and is connected to the bottom passage; A second guide passage connected to the first guide passage and formed on the upper part of the first journal bearing; A power transmission device characterized in that it includes a third guide passage formed along the vertical longitudinal direction on the inner surface of the first journal bearing and communicating with the second guide passage.

29. In Article 28, A power transmission device characterized in that the second guide euro is formed diagonally from the upper portion of the first journal bearing.

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