Motor

Abstract

The present disclosure relates to a motor comprising: a stator; the coil is wound on the stator; a housing member provided so as to surround the periphery of the stator and having a cooling medium injection part into which a cooling medium is injected; a guide flow path defined between the housing member and the stator, and configured to communicate with the cooling medium injection portion and guide the cooling medium; and a guide member provided at an end portion of the housing member and configured to guide the cooling medium discharged from the guide flow path to an end turn portion of the coil exposed to an end portion of the stator, thereby obtaining an advantageous effect of improving cooling performance, stability, and reliability.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a motor, and more particularly, to a motor capable of improving cooling performance, safety, and reliability. BACKGROUND

[0002] A hybrid vehicle or an electric vehicle, which is called an environmentally friendly vehicle, generates a driving force using an electric motor (hereinafter, referred to as a "drive motor") that obtains a rotational force from electric energy.

[0003] Generally, the drive motor includes a stator coupled to a housing and a rotor rotatably disposed in the stator with a predetermined air gap from the stator.

[0004] The stator includes a core made by stacking an electrical steel sheet and having a plurality of coil winding portions, and a stator coil wound on the core.

[0005] Meanwhile, due to eddy currents generated in the stator, high-temperature heat is generated in the motor. When the temperature of the motor increases to a predetermined temperature, the efficiency and the life of the motor can be deteriorated. Therefore, it is necessary to substantially cool the motor to prevent damage caused by heat and to consistently achieve stable operability.

[0006] However, in the related art, it is difficult to effectively cool the end turn portion of the coil that is exposed (protrudes) at the end portion of the stator. For this reason, it is difficult to secure sufficient performance in cooling of the motor.

[0007] Recently, various studies have been made to improve the performance of cooling the motor, but the research results are still insufficient. Therefore, there is a need to develop a technology to improve the performance of cooling the motor. SUMMARY

[0008] The disclosure is directed to providing a motor for an electric vehicle capable of improving cooling performance, stability, and reliability.

[0009] In particular, the disclosure is directed to effectively securing efficiency and performance of cooling the end turn portion of the coil.

[0010] The disclosure is also directed to simplifying the structure and reducing costs.

[0011] The disclosure is also directed to minimizing power consumption and improving energy efficiency.

[0012] The objectives to be achieved by the embodiments are not limited to the above-described objectives, but also include objectives or effects that can be understood from the solutions or embodiments described below.

[0013] To achieve the above object, an example embodiment of the present disclosure provides a motor including: a stator; a coil wound on the stator; a housing member provided to surround a periphery of the stator and having a cooling medium injection portion into which a cooling medium is injected; a guide flow path defined between the housing member and the stator and configured to communicate with the cooling medium injection portion and guide the cooling medium; and a guide member provided at an end portion of the housing member and configured to direct the cooling medium discharged from the guide flow path toward an end turn portion of the coil exposed to an end portion of the stator.

[0014] This is to improve the performance of cooling the motor, improve stability and reliability.

[0015] That is, due to eddy currents generated in the stator, high-temperature heat is generated in the motor. When the temperature of the motor increases to a predetermined temperature, the efficiency and lifespan of the motor can be degraded. Therefore, it is necessary to substantially cool the motor to prevent damage caused by heat and consistently achieve stable operability.

[0016] However, in the related art, it is difficult to effectively cool the end turn portion of the coil exposed (projected) at an end portion of the stator. For this reason, it is difficult to secure sufficient performance in cooling of the motor.

[0017] In contrast, in an embodiment of the present disclosure, the cooling medium discharged along the guide flow path is directed toward the end turn portion of the coil by the guide member. Therefore, an advantageous effect of improving the stability, reliability, and performance of cooling the motor can be obtained.

[0018] In an embodiment of the present disclosure, the cooling medium injected into the cooling medium injection portion not only cools the core portion (or the stator) of the coil while moving along the guide flow path, but also is concentrated into the end turn portion of the coil in which a relatively large amount of heat is generated by means of the guide member. Therefore, an advantageous effect of minimizing a temperature deviation (cooling performance deviation) between the core portion and the end turn portion of the coil and more effectively eliminating heat generated by the stator and the coil can be obtained.

[0019] The guide member can have various structures capable of guiding the cooling medium discharged from the guide flow path to the end turn portion of the coil.

[0020] According to an example embodiment of the present disclosure, the guide member can include: a connection portion connected to the end portion of the housing member; and a guide portion provided at an end portion of the connection portion and configured to direct the cooling medium discharged from the guide flow path toward the end turn portion.

[0021] According to an exemplary embodiment of the present disclosure, the guide portion can be disposed to be inclined with respect to the connection portion and to guide the end turn portion.

[0022] As described above, in the embodiment of the present disclosure, the guide portion is disposed to be inclined with respect to the connection portion. Thus, an advantageous effect can be obtained in which a case in which the cooling medium discharged from the guide flow path is scattered backward in a random direction upon contact with the guide portion is minimized. In addition, an advantageous effect can be obtained in which the injection direction of the cooling medium can be more accurately controlled to be in a direction toward the end turn portion of the coil.

[0023] According to an exemplary embodiment of the present disclosure, the motor can include an inclined guide portion disposed integrally with the end portion of the housing member and configured to guide the cooling medium discharged from the guide flow path toward the end turn portion.

[0024] As described above, in the embodiment of the present disclosure, the inclined guide portion is disposed at the end portion of the housing member. Thus, an advantageous effect can be obtained in which the injection direction of the cooling medium discharged from the guide flow path can be more accurately controlled to be in a direction toward the end turn portion of the coil.

[0025] According to an exemplary embodiment of the present disclosure, the motor can include a guide baffle disposed on an inner circumferential surface of the guide portion and protruding in a longitudinal direction of the housing member.

[0026] As described above, in the embodiment of the present disclosure, the guide baffle is disposed on the inner circumferential surface of the guide portion so that the cooling medium discharged from the guide flow path can be guided toward the end turn portion of the coil without stagnating on the inner circumferential surface of the guide portion or flowing downward along the circumferential direction of the guide portion to a lower end of the guide portion. Thus, an advantageous effect can be obtained in which the supply direction of the cooling medium can be more accurately controlled to be in a direction toward the end turn portion of the coil.

[0027] According to an exemplary embodiment of the present disclosure, the motor can include a guide groove disposed in an outer surface of the stator in a longitudinal direction of the stator, wherein the guide flow path is defined along the guide groove.

[0028] According to an exemplary embodiment of the present disclosure, the motor can include a guide protrusion disposed at an end portion of the guide groove and configured to define an exit flow path having a smaller cross-sectional area than the guide flow path.

[0029] As described above, in the embodiments of the present disclosure, the outlet flow path through which the cooling medium eventually discharged by the guide flow path has a smaller cross-sectional area than the guide flow path, so that the discharge velocity of the cooling medium discharged along the outlet flow path can be increased based on the Bernoulli principle, and the cooling medium can be injected to the end turn portion of the coil. Accordingly, an advantageous effect of further improving the cooling efficiency and cooling performance of the end turn portion of the coil can be obtained.

[0030] According to an exemplary embodiment of the present disclosure, the motor can include a guide clip disposed at an end portion of the guide groove and configured to guide the cooling medium to the end turn portion.

[0031] The guide clip can have various structures capable of guiding the cooling medium discharged from the guide flow path to the end turn portion of the coil.

[0032] According to an exemplary embodiment of the present disclosure, the guide clip can include a head portion disposed at an end portion of the guide groove, a first leg portion connected to one end of the head portion and supported on a first inner wall surface of the guide groove, a second leg portion connected to the other end of the head portion and supported on a second inner wall surface of the guide groove facing the first inner wall surface, an outlet flow path defined between the first leg portion and the second leg portion and configured to guide the cooling medium moving along the guide flow path to an inner surface of the head portion, and an inclined portion disposed on the inner surface of the head portion and configured to guide the cooling medium to the end turn portion.

[0033] The outlet flow path can have various structures capable of guiding the cooling medium moving along the guide flow path to the inner surface of the head portion.

[0034] According to an exemplary embodiment of the present disclosure, the outlet flow path can be defined to have a cross-sectional area gradually decreasing from an inlet adjacent to the central portion of the stator toward an outlet.

[0035] As described above, in the embodiments of the present disclosure, the outlet flow path has a cross-sectional area gradually decreasing from the inlet toward the outlet, so that the discharge velocity of the cooling medium discharged through the outlet of the outlet flow path can be increased based on the Bernoulli principle, and the cooling medium can be injected to the inner surface (inclined portion) of the head portion. Accordingly, an advantageous effect of further improving the cooling efficiency and cooling performance of the end turn portion of the coil can be obtained.

[0036] According to the above-described embodiments of the present disclosure, an advantageous effect of improving the cooling performance, stability, and reliability can be obtained.

[0037] In particular, according to the embodiment of the present disclosure, an advantageous effect of effectively ensuring the efficiency and performance of the end turn portion of the cooling coil can be obtained.

[0038] In addition, according to the embodiment of the present disclosure, an advantageous effect of simplifying the structure and reducing the cost can be obtained.

[0039] In addition, according to the embodiment of the present disclosure, an advantageous effect of minimizing power consumption and improving energy efficiency can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a view for explaining a motor according to an embodiment of the present disclosure.

[0041] Figure 2 is a view for explaining a guide member of a motor according to an embodiment of the present disclosure.

[0042] Figure 3 is a view for explaining a guide protrusion of a motor according to an embodiment of the present disclosure.

[0043] Figure 4 and Figure 5 is a view for explaining a modified example of a guide member of a motor according to an embodiment of the present disclosure.

[0044] Figures 6 to 8 is a view for explaining a guide clip of a motor according to an embodiment of the present disclosure.

[0045] REFERENCE NUMERALS OF ELEMENTS IN DRAWINGS

[0046] 10: Motor

[0047] 110: Stator

[0048] 112: Guide groove

[0049] 114: Guide protrusion

[0050] 114a: Outlet flow path

[0051] 116: Restriction groove

[0052] 120: Housing member

[0053] 122: Cooling medium injection portion

[0054] 124: Inclined guide portion

[0055] 130: Coil

[0056] 132: End turn portion

[0057] 140: Guide flow path

[0058] 150, 150': guide member

[0059] 152, 152': connecting portion

[0060] 154, 154': guide portion

[0061] 156: guide baffle

[0062] 160: guide clip

[0063] 161: head portion

[0064] 162: inclined portion

[0065] 163: first leg portion

[0066] 164: second leg portion

[0067] 165: discharge flow path

[0068] 166: stop protrusion

[0069] 167: restraint protrusion DETAILED DESCRIPTION

[0070] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0071] However, the technical spirit of the present disclosure is not limited to some embodiments described herein, but can be implemented in various different forms. Within the scope of the technical spirit of the present disclosure, one or more constituent elements in the embodiments can be selectively combined and substituted to be used.

[0072] In addition, unless specifically and explicitly defined and stated otherwise, the terms used in the embodiments of the present disclosure, including technical terms and scientific terms, can be interpreted as meanings commonly understood by those having ordinary knowledge in the art to which the present disclosure pertains. The meanings of commonly used terms such as those defined in a dictionary can be interpreted in consideration of the contextual meanings in the related art.

[0073] In addition, the terms used in the embodiments of the present disclosure are for the purpose of explaining the embodiments, not for limiting the present disclosure.

[0074] In the present specification, the singular form can include the plural form unless specifically and explicitly stated otherwise. The expression "at least one of A, B, and C" can include one or more of all combinations of A, B, and C.

[0075] In addition, terms such as first, second, A, B, (a), and (b) can be used to describe the constituent elements of the embodiments of the present disclosure.

[0076] These terms are used only for the purpose of distinguishing one constituent element from another constituent element and do not have any limitation on the nature, sequence or order of constituent elements.

[0077] In addition, when one constituent element is described as being "connected", "coupled" or "attached" to another constituent element, one constituent element can be directly connected, coupled or attached to the other constituent element, or can be connected, coupled or attached to the other constituent element through another constituent element interposed therebetween.

[0078] In addition, the expression "one constituent element is disposed or arranged above (on) or below (under) another constituent element" includes not only a case where the two constituent elements are in direct contact with each other, but also a case where one or more other constituent elements are disposed or arranged between the two constituent elements. The expressions "above (on) or below (under)" can mean a downward direction and an upward direction based on one constituent element.

[0079] Referring to Figures 1 to 8 , the motor 10 according to the embodiment of the disclosure includes a stator 110, a coil 130 wound on the stator 110, a housing member 120 configured to surround a periphery of the stator 110 and having a cooling medium injection portion 122 through which a cooling medium is injected, a guide flow path 140 defined between the housing member 120 and the stator 110 and configured to communicate with the cooling medium injection portion 122 and guide the cooling medium, and a guide member 150 provided at an end portion of the housing member 120 and configured to guide the cooling medium discharged from the guide flow path 140 toward an end turn portion 132 of the coil 130 exposed to an end portion of the stator 110.

[0080] For reference, the motor 10 according to the embodiment of the disclosure can be applied to various objects according to required conditions and design specifications. The disclosure is not restricted or limited by the kind and nature of the object to which the motor 10 is applied.

[0081] For example, the motor 10 according to the embodiment of the disclosure can be used as a driving motor of a hybrid vehicle or an electric vehicle.

[0082] Referring to Figures 1 to 3 , the stator 110 is configured to cause electrical interaction in common with a rotor (not shown).

[0083] More specifically, the stator 110 can be accommodated in the housing member 120, and the coil 130 can be wound on the stator 110 and configured to cause electrical interaction between the stator and the rotor.

[0084] More specifically, the stator 110 can include a stator core (not shown) disposed to have a hollow cylindrical shape.

[0085] The stator core can have various structures in which multiple teeth (not shown) are arranged along its inner circumferential surface and spaced apart from each other, and slots (not shown) are defined between the teeth. This disclosure is not limited or constrained by the structure and dimensions (standards) of the stator core.

[0086] For example, the stator core can be made by stacking multiple electrical steel plates in the axial direction of the stator 110. According to another embodiment of this disclosure, the stator core can be made using multiple segmented cores that commonly define an annular shape.

[0087] The coil 130 may be made of a typical metallic material (e.g., copper) capable of defining a magnetic circuit. This disclosure is not limited or constrained by the material and shape of the coil 130.

[0088] For example, a ring coil 130 with a circular cross-section can be used as coil 130. According to another embodiment of this disclosure, a flat coil (also called a angular copper wire or hairpin) with an angular cross-section (e.g., a quadrilateral cross-section) can be used as coil.

[0089] With coil 130 set (wound) in stator 110, coil 130 is exposed to the outside of stator 110 (based on...). Figure 1 The end turns 132 of the stator (left and right ends in the axial direction) can be twisted in a predetermined posture and then welded. For example, the end turns 132 of the coil 130 exposed to the outside of the stator 110 can be configured to define a generally annular shape.

[0090] The rotor rotates through the electrical interaction between the rotor and the stator 110 and is configured to provide driving force to the object.

[0091] The rotor can have various structures that enable it to rotate through electrical interaction between the rotor and the stator 110. This disclosure is not limited or constrained by the type and structure of the rotor.

[0092] For example, the rotor may include a rotor core (not shown) and a magnet (not shown). The rotor core may have a structure made by stacking multiple circular plates, each circular plate being arranged in the form of a thin steel plate or in the form of a box.

[0093] A shaft hole (not shown) can be located at the center of the rotor, and a shaft can be connected to the shaft hole.

[0094] A protrusion (not shown) may protrude from the outer peripheral surface of the rotor core and guide the magnet. The magnet may be attached to the outer peripheral surface of the rotor core and spaced apart from each other at predetermined intervals in the circumferential direction of the rotor core.

[0095] Additionally, the rotor may include a can assembly (not shown) configured to surround the magnet and prevent the magnet from separating.

[0096] The housing member 120 is disposed to surround the periphery of the stator 110. The cooling medium injection portion 122 is provided in the housing member 120, through which the cooling medium is injected.

[0097] The housing member 120 can have various structures capable of surrounding the periphery of the stator 110. The present disclosure is not bound or limited by the structure and shape of the housing member 120.

[0098] In particular, the housing member 120 can be disposed in a substantially cylindrical shape to continuously surround the periphery of the coil 130.

[0099] For reference, in the embodiment of the present disclosure shown and described above, an example in which the housing member 120 is disposed in a cylindrical shape to continuously surround the periphery of the stator 110 has been described. However, according to another embodiment of the present disclosure, the housing member can be configured to partially surround a portion of the periphery of the stator (for example, have a circular arc shape).

[0100] Referring to Figure 1 and Figure 2 the cooling medium injection portion 122 is formed through the wall surface of the housing member 120 so as to inject the cooling medium into the housing member 120.

[0101] For reference, in the embodiment of the present disclosure, the cooling medium can be defined as a refrigerant (cooling medium) for cooling the coil 130 (or the stator). The present disclosure is not bound or limited by the type and nature of the cooling medium. Hereinafter, an example in which oil having a lower temperature than the coil 130 is used as the cooling medium is described.

[0102] The cooling medium injection portion 122 can have various structures capable of injecting the cooling medium. The present disclosure is not bound or limited by the structure and shape of the cooling medium injection portion 122.

[0103] For example, the cooling medium injection portion 122 can have a substantially circular hole shape and be formed to pass through the wall surface of the housing member 120.

[0104] In particular, the cooling medium injection portion 122 can be disposed in the substantially central portion of the housing member 120 based on the longitudinal direction (axial direction of the stator) of the housing member 120.

[0105] As described above, the cooling medium injection portion 122 is disposed in the substantially central portion of the housing member 120 based on the axial direction of the stator 110, and thus, an advantageous effect can be obtained in which the cooling medium injected through the cooling medium injection portion 122 can be supplied to the end turn portions 132 of the opposite sides of the coil 130 in uniform conditions (for example, uniform temperature, uniform flow rate).

[0106] Referring to Figures 2 to 3 The guide flow path 140 is defined between the housing member 120 and the stator 110, and is configured to communicate with the cooling medium injection portion 122 and guide the cooling medium injected through the cooling medium injection portion 122 toward the end portion (end turn portion of the coil) of the stator 110.

[0107] In the embodiment of the disclosure, the configuration in which the guide flow path 140 is defined between the housing member 120 and the stator 110 is defined to include a configuration in which the guide flow path 140 is formed in the inner surface of the housing member 120 or the outer surface of the stator 110, and a configuration in which the guide flow path 140 is formed in the inner surface of the housing member 120 and the outer surface of the stator 110, respectively.

[0108] For example, the motor 10 can include a guide groove 112 provided in the outer surface of the stator 110 in the longitudinal direction of the stator 110, and the guide flow path 140 can be defined along the guide groove 112.

[0109] In particular, the guide flow path 140 can have a shape straight in the longitudinal direction of the stator 110. According to another embodiment of the disclosure, the guide flow path can be formed to be inclined with respect to the longitudinal direction of the stator, or the guide flow path can be formed in a curved shape.

[0110] With the above-described structure, the cooling medium injected through the cooling medium injection portion 122 can move along the guide flow path 140 to the end turn portion 132 of the coil 130 exposed to the end portion of the stator 110. When the cooling medium moves along the guide flow path 140, both the core portion of the coil 130 (or the stator) and the end turn portion 132 of the coil 130 can be cooled.

[0111] Referring to Figure 3 According to an exemplary embodiment of the disclosure, the motor 10 can include a guide protrusion 114 provided at the end portion of the guide groove 112 and configured to define an outlet flow path 114a, each outlet flow path 114a having a smaller cross-sectional area than the guide flow path 140.

[0112] For example, the guide protrusion 114 can be provided on two opposite inner wall surfaces (a first inner wall surface and a second inner wall surface) of the end portion of the guide groove 112, respectively. The outlet flow path 114a having a smaller cross-sectional area than the guide flow path 140 can be defined between the guide protrusions 114 facing each other. According to another embodiment of the disclosure, the guide protrusion can be provided on only one of the two opposite inner wall surfaces of the end portion of the guide groove.

[0113] As described above, in the embodiment of the present disclosure, the outlet flow path 114a through which the cooling medium supplied along the guide flow path 140 is eventually discharged has a smaller cross-sectional area than the guide flow path 140, so that the discharge velocity of the cooling medium discharged along the outlet flow path 114a can be increased based on the Bernoulli principle, and the cooling medium can be injected to the end turn portion 132 of the coil 130. Accordingly, an advantageous effect of further improving the cooling efficiency and cooling performance of the end turn portion 132 of the coil 130 can be obtained.

[0114] Referring to Figure 1 and Figure 2 , the guide member 150 is provided to give directionality to the cooling medium discharged from the guide flow path 140 so as to guide the cooling medium to the end turn portion 132 of the coil 130. In other words, the guide member 150 is provided to allow the cooling medium discharged from the guide flow path 140 to be supplied to the end turn portion 132 of the coil 130 in concentration.

[0115] The guide member 150 can have various structures capable of guiding the cooling medium discharged from the guide flow path 140 to the end turn portion 132 of the coil 130. The present disclosure is not bound or limited by the structure of the guide member 150.

[0116] According to an exemplary embodiment of the present disclosure, the guide member 150 can include a connection portion 152 connected to an end portion of the housing member 120, and a guide portion 154 provided at an end portion of the connection portion 152 and configured to guide the cooling medium discharged from the guide flow path 140 to the end turn portion 132.

[0117] For example, the connection portion 152 can have a substantially hollow ring shape and be connected to the end portion of the housing member 120 (e.g., by fastening a bolt). The guide portion 154 can be bent while facing the outlet of the guide flow path 140 and integrated with the end portion of the connection portion 152.

[0118] As described above, in the embodiment of the present disclosure, the cooling medium discharged from the guide flow path 140 comes into contact with the guide portion 154 and is then guided to the end turn portion 132 of the coil 130, so that the cooling medium can be supplied to the end turn portion 132 of the coil 130 in concentration. Accordingly, an advantageous effect of being able to further improve the cooling efficiency of the end turn portion 132 of the coil 130 can be obtained.

[0119] According to an exemplary embodiment of the present disclosure, the guide portion 154 can be inclined with respect to the connection portion 152 so that the guide portion 154 guides the end turn portion 132.

[0120] In this case, the configuration in which the guide portion 154 is disposed to be inclined with respect to the connection portion 152 can be understood as a configuration in which the guide portion 154 is disposed to be inclined at a predetermined angle with respect to the radial direction of the stator 110.

[0121] The angle of the guide portion 154 with respect to the connection portion 152 can be variously changed according to the structure and specifications of the end turn portion 132 of the coil 130. The present disclosure is not bound or limited by the angle of the guide portion 154 with respect to the connection portion 152.

[0122] As described above, in the embodiment of the present disclosure, the guide portion 154 is disposed to be inclined with respect to the connection portion 152. Accordingly, the following advantageous effects can be obtained: the case in which the cooling medium discharged from the guide flow path 140 is scattered backward in a random direction when the cooling medium comes into contact with the guide portion 154 is minimized. In addition, the advantageous effect that the injection direction of the cooling medium can be more accurately controlled to be a direction toward the end turn portion 132 of the coil 130 can be obtained.

[0123] In addition, with reference to Figure 2 , according to the exemplary embodiment of the present disclosure, the motor 10 can include an inclined guide portion 124 that is disposed integrally with an end portion of the housing member 120 and is configured to guide the cooling medium discharged from the guide flow path 140 toward the end turn portion 132.

[0124] For example, the above-described guide member 150 can be disposed at one end (the left end based on Figure 6 ) of the housing member 120, and the inclined guide portion 124 can be integrated with the other end (the right end based on Figure 6 ) of the housing member 120.

[0125] For example, the inclined guide portion 124 and the housing member 120 can be formed as a single-piece structure by partially processing the end portion of the housing member 120.

[0126] The angle of the inclined guide portion 124 can be variously changed according to the structure and specifications of the end turn portion 132 of the coil 130. The present disclosure is not bound or limited by the angle of the inclined guide portion 124.

[0127] As described above, in the embodiment of the present disclosure, the inclined guide portion 124 is disposed at the end portion of the housing member 120. Accordingly, the advantageous effect that the injection direction of the cooling medium discharged from the guide flow path 140 can be more accurately controlled to be a direction toward the end turn portion 132 of the coil 130 can be obtained.

[0128] In the above-described embodiment of the present disclosure, an example in which the guide portion 154 is disposed to be inclined with respect to the connection portion 152 has been described. However, according to another embodiment of the present disclosure, the guide portion can extend in the radial direction of the connection portion.

[0129] That is, with reference to Figure 4 and Figure 5 , the guide member 150 can include a connection portion 152' connected to an end portion of the stator 110, and a guide portion 154' provided at an end portion of the connection portion 152' and configured to guide the cooling medium discharged from the guide flow path 140 toward the end turn portion 132. The guide portion 154' can extend in a radial direction of the connection portion 152' (a radial direction of the stator), and be disposed to cover an outlet of the guide flow path 140.

[0130] In addition, with reference to Figure 4 , according to an exemplary embodiment of the present disclosure, the motor 10 can include a guide baffle 156 provided on an inner circumferential surface of the guide portion 154' and protruding in a longitudinal direction of the housing member 120.

[0131] The guide baffle 156 can be disposed to be inclined at a predetermined angle with respect to a radial direction of the guide member 150. The present disclosure is not bound or limited by the arrangement angle of the guide baffle 156.

[0132] Specifically, the guide baffle 156 can be provided as a plurality of guide baffles 156 disposed to be spaced apart from each other in a circumferential direction of the guide member 150.

[0133] As described above, in the embodiment of the present disclosure, the guide baffle 156 is provided on the inner circumferential surface of the guide portion 154' so that the cooling medium discharged from the guide flow path 140 can be guided toward the end turn portion 132 of the coil 130 without stagnating on the inner circumferential surface of the guide portion 154' or flowing down in a circumferential direction of the guide portion 154' to a lower end (a lower end based on a direction of gravity) of the guide portion 154'. Accordingly, an advantageous effect of more accurately controlling a supply direction of the cooling medium to be a direction toward the end turn portion 132 of the coil 130 can be obtained.

[0134] With reference to Figures 6 to 8 , according to an exemplary embodiment of the present disclosure, the motor 10 can include a guide clip 160 provided at an end portion of the guide groove 112 and configured to guide the cooling medium toward the end turn portion 132.

[0135] The guide clip 160 is disposed to give directionality to the cooling medium discharged from the guide flow path 140 to guide the cooling medium toward the end turn portion 132 of the coil 130. In other words, the guide member 150 is disposed to allow the cooling medium discharged from the guide flow path 140 to be supplied to the end turn portion 132 of the coil 130 in concentration.

[0136] Hereinafter, an example in which the guide clips 160 are respectively provided at both opposite end portions of the guide flow path 140 will be described.

[0137] The guide clip 160 can have various structures capable of guiding the cooling medium discharged from the guide flow path 140 to the end turn portion 132 of the coil 130. The present disclosure is not bound or limited by the structure of the guide clip 160.

[0138] According to an embodiment of the present disclosure, the guide clip 160 can include a head portion 161 provided at an end portion of the guide groove 112, a first leg portion 163 connected to one end of the head portion 161 and supported on a first inner wall surface of the guide groove 112, a second leg portion 164 connected to the other end of the head portion 161 and supported on a second inner wall surface of the guide groove 112 facing the first inner wall surface, a discharge flow path 165 defined between the first leg portion 163 and the second leg portion 164 and configured to guide the cooling medium moving along the guide flow path 140 to an inner surface of the head portion 161, and an inclined portion 162 provided on the inner surface of the head portion 161 and configured to guide the cooling medium to the end turn portion 132.

[0139] For example, the head portion 161, the first leg portion 163, and the second leg portion 164 can be connected to collectively define an approximate "U" shape.

[0140] For example, the head portion 161, the first leg portion 163, and the second leg portion 164 can each be made of a typical plastic material. The first leg portion 163 and the second leg portion 164 can be supported by the head portion 161 and configured to be elastically movable in a direction in which the first leg portion 163 and the second leg portion 164 move toward and away from each other with respect to the head portion 161.

[0141] The discharge flow path 165 can have various structures capable of guiding the cooling medium moving along the guide flow path 140 to the inner surface of the head portion 161. The present disclosure is not bound or limited by the structure and shape of the discharge flow path 165.

[0142] In particular, the discharge flow path 165 can be defined to have a cross-sectional area that gradually decreases in a direction from an inlet (based on the right side of the stator 110) adjacent to the central portion of the stator 110 toward an outlet (based on the left side of the stator 110). Figure 7 Figure 7

[0143] ​​As described above, in the embodiment of the present disclosure, the discharge flow path 165 has a cross-sectional area that gradually decreases from the inlet toward the outlet, so that the discharge speed of the cooling medium discharged through the outlet of the outlet flow path 114a can be increased based on the Bernoulli principle, and the cooling medium can be injected to the inner surface (inclined portion) of the head portion 161. Thus, a favorable effect of further improving the cooling efficiency and cooling performance of the end turn portion 132 of the coil 130 can be obtained.

[0144] The inclined portion 162 is disposed to guide the cooling medium passing through the discharge flow path 165 toward the end turn portion 132 of the coil 130 (for example, the inclined portion 162 is disposed to guide the cooling medium in a direction inclined downward with respect to the outlet of the discharge flow path 165).

[0145] The angle of the inclined portion 162 can be variously changed according to the structure and specifications of the end turn portion 132 of the coil 130. The present disclosure is not constrained or limited by the angle of the inclined portion 162.

[0146] For example, the inclined portion 162 can have a curved shape. Alternatively, the inclined portion can have a planar shape or other shapes.

[0147] As described above, in the embodiment of the present disclosure, the inclined portion 162 is disposed on the inner surface of the head portion 161. Thus, a favorable effect of more accurately controlling the injection direction of the cooling medium discharged from the discharge flow path 165 to be in the direction toward the end turn portion 132 of the coil 130 can be obtained.

[0148] According to the exemplary embodiment of the present disclosure, the motor 10 can include a stop protrusion 166 protruding from the side surface of the head portion 161.

[0149] The stop protrusion 166 is disposed to prevent the guide clip 160 from excessively entering the guide groove 112 when the guide clip 160 enters the guide groove 112.

[0150] The stop protrusion 166 can have various structures capable of being restrained by the end portion of the stator 110 in the longitudinal direction of the stator 110. The present disclosure is not constrained or limited by the structure and shape of the stop protrusion 166.

[0151] For example, the stop protrusions 166 can be symmetrically disposed on both opposite surfaces of the head portion 161, and each stop protrusion 166 has a protrusion shape of approximately a quadrilateral.

[0152] In addition, according to the exemplary embodiment of the present disclosure, the motor 10 can include a restraint groove 116a disposed in at least any one of the first inner wall surface and the second inner wall surface, and a restraint protrusion 167 disposed on at least any one of the first leg portion 163 and the second leg portion 164 and configured to be restrained by the restraint groove 116a.

[0153] Hereinafter, an example in which the restraint protrusions 167 are provided on the first leg portion 163 and the second leg portion 164, respectively, and the restraint grooves 116a accommodating the restraint protrusions 167 are provided in the first inner wall surface and the second inner wall surface, respectively, will be described.

[0154] The restraint grooves 116a and the restraint protrusions 167 are provided to suppress disengagement of the guide clip 160 while ensuring a state in which the guide clip 160 is disposed in the guide groove 112. The present disclosure is not bound or limited by the structure and shape of the restraint grooves 116a and the restraint protrusions 167.

[0155] For example, the restraint grooves 116a can have a slot shape that is approximately quadrangular, and the restraint protrusions 167 can have a shape that is approximately triangular.

[0156] The restraint protrusions 167 can move along the first inner wall surface and the second inner wall surface, and then be restrained by the restraint grooves 116a in a snap-fit fastening manner through elastic movement of the first leg portion 163 and the second leg portion 164 with respect to the head portion 161.

[0157] Although the embodiments have been described above, the embodiments are merely illustrative and are not intended to limit the present disclosure. It will be understood by those skilled in the art that various modifications and applications not described above can be made to the embodiments without departing from the inherent characteristics of the embodiments. For example, each of the constituent elements specifically described in the embodiments can be modified and then implemented. Furthermore, it should be interpreted that differences related to the modifications and applications are included in the scope of the present disclosure.

[0158] Cross Reference to Related Applications

[0159] This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0024466, filed on February 20, 2024, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.

Claims

1. A motor characterized by, The motor includes: a stator; a coil wound around the stator; a housing member provided around a periphery of the stator and including a cooling medium injection portion for injecting a cooling medium; a guide flow path defined between the housing member and the stator and configured to communicate with the cooling medium injection portion and guide the cooling medium; and a guide member provided at an end portion of the housing member and configured to direct the cooling medium discharged from the guide flow path toward an end turn portion of the coil exposed to an end portion of the stator.

2. The motor of claim 1, wherein The guide member includes: a connection portion connected to the end portion of the housing member; and a guide portion provided at an end portion of the connection portion and configured to direct the cooling medium discharged from the guide flow path toward the end turn portion of the coil.

3. The motor of claim 2, wherein The guide portion is provided inclined with respect to the connection portion and directed toward the end turn portion of the coil.

4. The motor of claim 2, wherein The motor includes: a guide baffle provided on an inner peripheral surface of the guide portion and protruding in a longitudinal direction of the housing member.

5. The motor of claim 1, wherein The motor includes: an inclined guide portion provided integrally with the end portion of the housing member and configured to direct the cooling medium discharged from the guide flow path toward the end turn portion of the coil.

6. The motor of claim 1, wherein The motor includes: a guide groove provided in an outer surface of the stator along a longitudinal direction of the stator, wherein the guide flow path is defined along the guide groove.

7. The motor of claim 6, wherein The motor includes: a guide protrusion provided at an end portion of the guide groove and configured to define an outlet flow path having a smaller cross-sectional area than the guide flow path.

8. The motor of claim 6, wherein The motor includes: a guide clip provided at an end portion of the guide groove and configured to direct the cooling medium toward the end turn portion of the coil.

9. The motor of claim 8, wherein, The guide clip includes: a head portion provided at the end portion of the guide groove; a first leg portion connected to one end of the head portion and supported on a first inner wall surface of the guide groove; a second leg portion connected to the other end of the head portion and supported on a second inner wall surface of the guide groove facing the first inner wall surface; a discharge flow path defined between the first leg portion and the second leg portion and configured to direct the cooling medium moving along the guide flow path toward an inner surface of the head portion; and an inclined portion provided on the inner surface of the head portion and configured to direct the cooling medium toward the end turn portion of the coil.

10. The motor of claim 9, wherein, The discharge flow path is defined to have a cross-sectional area gradually decreasing from an inlet toward an outlet.

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