Motor

Abstract

Engine comprehensive: a stator; a coil wound around the stator; a housing member provided to surround 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 arranged to communicate with the cooling medium injection portion and guide the cooling medium; and a guide member provided at one end of the housing member and configured to guide the cooling medium discharged from the guide flow path toward an end turn portion of the coil exposed to one end of the stator.

Description

Cross-reference to related application

[0001] 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 hereby incorporated by reference. Technical field

[0002] The present disclosure relates to an engine and, more particularly, to an engine capable of improving cooling performance, safety, and reliability. Technical background

[0003] A hybrid vehicle or electric vehicle, referred to as an environmentally friendly vehicle, generates driving force using an electric motor (hereinafter referred to as a “driving motor”) that generates rotating force from electrical energy.

[0004] In general, the drive motor comprises a stator coupled to a housing and a rotor rotatably disposed in the stator with a predetermined air gap from the stator.

[0005] The stator includes a core made by stacking electrical steel sheets and having a plurality of coil winding portions, and a stator coil wound around the core.

[0006] However, high-temperature heat is generated in the motor due to the eddy currents generated in the stator. If the motor temperature rises to a certain temperature, the efficiency and service life of the motor may deteriorate. Therefore, it is necessary to significantly cool the motor to prevent heat-induced damage and ensure consistently stable operation.

[0007] However, in the prior art, it is difficult to effectively cool a coil winding end portion exposed (protruding) to one end of the stator. Therefore, it is difficult to ensure sufficient cooling performance of the motor.

[0008] Recently, various studies have been conducted to improve engine cooling performance, but the results are still insufficient. Therefore, there is a need to develop technology to improve engine cooling performance. Summary

[0009] The present disclosure has been made in an effort to provide a motor for an electric vehicle that can improve cooling performance, stability, and reliability.

[0010] In particular, the present disclosure has been made in an effort to effectively ensure efficiency and performance in cooling an end turn portion of a coil.

[0011] The present disclosure was also made in an effort to simplify structure and reduce costs.

[0012] The present disclosure was also made in an effort to minimize power consumption and improve energy efficiency.

[0013] The objectives to be achieved by the embodiments are not limited to the objectives mentioned above, but also include objectives or effects that are apparent from the solutions or embodiments described below.

[0014] To achieve the above-mentioned objects, an exemplary embodiment of the present disclosure provides a motor comprising: a stator; a coil wound around the stator; a casing member provided to surround a periphery of the stator and including a cooling medium injection portion through which a cooling medium is injected; a guide flow path defined between the casing 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 one end of the casing member and configured to guide the cooling medium discharged from the guide flow path toward an end turn portion of the coil exposed to one end of the stator.

[0015] This serves to increase the cooling performance of the engine and improve stability and reliability.

[0016] This means that high-temperature heat is generated in the motor due to eddy currents generated in the stator. If the motor temperature rises to a predetermined temperature, the efficiency and service life of the motor may deteriorate. Therefore, it is necessary to significantly cool the motor to prevent heat-induced damage and ensure consistently stable operation.

[0017] However, in the prior art, it is difficult to effectively cool a coil winding end portion exposed (protruding) to one end of the stator. Therefore, it is difficult to ensure sufficient cooling performance of the motor.

[0018] In contrast, in the embodiment of the present disclosure, the cooling medium discharged along the guide flow path is guided to the end turn portion of the coil by means of the guide member. Therefore, it is possible to achieve a beneficial effect of improving stability, reliability, and performance in cooling the motor.

[0019] Among other things, in the embodiment of the present disclosure, the cooling medium injected into the cooling medium injection portion not only cools the core portion of the coil (or the stator) while moving along the guide flow paths, but is also concentratedly sprayed by the guide member onto the end turn portions of the coil, which generate a relatively large amount of heat. Therefore, it is possible to achieve a beneficial effect by minimizing temperature deviation (cooling performance deviation) between the core portion of the coil and the end turn portion, and more effectively removing the heat generated by the stator and the coil.

[0020] The guide member may have various structures capable of guiding the cooling medium discharged from the guide flow path to the end turn portion of the coil.

[0021] According to the exemplary embodiment of the present disclosure, the guide member may include: a connecting portion connected to the end of the housing member; and a guide portion provided at one end of the connecting portion and configured to guide the cooling medium discharged from the guide flow path toward the end turn portion.

[0022] According to the exemplary embodiment of the present disclosure, the guide portion may be provided to be inclined with respect to the connecting portion and directed toward the end turn portion.

[0023] As described above, in the embodiment of the present disclosure, the guide portion is provided to be inclined with respect to the connecting portion. Therefore, it is possible to achieve an advantageous effect by minimizing a situation where the cooling medium discharged from the guide flow path scatters backward in random directions when the cooling medium comes into contact with the guide portion. Furthermore, it is possible to achieve an advantageous effect by more accurately controlling a spray direction of the cooling medium toward the end turn portion of the coil.

[0024] According to the exemplary embodiment of the present disclosure, the motor may include: an inclined guide portion provided integrally with the end of the housing member and configured to guide the cooling medium discharged from the guide flow path toward the end turn portion of the coil.

[0025] As described above, in the embodiment of the present disclosure, the inclined guide portion is provided at the end of the housing member. Therefore, it is possible to achieve an advantageous effect by more accurately controlling the spray direction of the cooling medium discharged from the guide flow path toward the end turn portion of the coil.

[0026] According to the exemplary embodiment of the present disclosure, the motor may include: a guide panel provided on an inner peripheral surface of the guide portion and protruding in a longitudinal direction of the housing member.

[0027] As described above, in the embodiment of the present disclosure, the guide orifices are provided on the inner peripheral surface of the guide portion, so that the cooling medium discharged from the guide flow path can be guided to the end turn portion of the coil without stagnating on the inner peripheral surface of the guide portion or flowing downward in a circumferential direction of the guide portion toward a lower end of the guide portion. Therefore, it is possible to achieve an advantageous effect by more accurately controlling the supply direction of the cooling medium toward the end turn portion of the coil.

[0028] According to the exemplary embodiment of the present disclosure, the motor may include: a guide groove provided 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.

[0029] According to the exemplary embodiment of the present disclosure, the motor may include: a guide protrusion provided at one end of the guide groove and configured to define an exhaust flow path having a smaller cross-sectional area than the guide flow path.

[0030] As described above, in the embodiment of the present disclosure, the outlet flow path through which the cooling medium supplied along the guide flow path is finally discharged has a smaller cross-sectional area than the guide flow path, so that a discharge velocity of the cooling medium to be discharged along the outlet flow path can be increased based on the Bernoulli principle, and the cooling medium can be sprayed onto the end turn portions of the coil. Therefore, it is possible to achieve a beneficial effect of further improving the efficiency and performance of cooling the end turn portions of the coil.

[0031] According to the exemplary embodiment of the present disclosure, the motor may include: a guide bracket provided at one end of the guide groove and configured to guide the cooling medium toward the end turn portion of the coil.

[0032] The guide clamp may have various structures capable of guiding the cooling medium discharged from the guide flow path to the end turn portion of the coil.

[0033] According to the exemplary embodiment of the present disclosure, the guide bracket may include: a head portion provided at the end 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 another 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 guide the cooling medium moving along the guide flow path to an inner surface of the head portion; and an inclined portion provided on the inner surface of the head portion and configured to guide the cooling medium toward the end turn portion of the coil.

[0034] The discharge flow path may have various structures capable of guiding the cooling medium moving along the guide flow path to the inner surface of the head portion.

[0035] According to the exemplary embodiment of the present disclosure, the discharge flow path may be defined to have a cross-sectional area that gradually decreases from an inlet adjacent to a central portion of the stator to an outlet.

[0036] As described above, in the embodiment of the present disclosure, the discharge flow path has a cross-sectional area that gradually decreases from the inlet to the outlet, so that a discharge velocity of the cooling medium to be discharged through the outlet of the discharge flow path can be increased based on the Bernoulli principle, and the cooling medium can be sprayed onto the inner surface (inclined portion) of the head portion. Therefore, it is possible to achieve a beneficial effect of further improving the efficiency and performance of cooling the end turn portion of the coil.

[0037] According to the above-described embodiment of the present disclosure, it is possible to achieve an advantageous effect of improving cooling performance, stability, and reliability.

[0038] In particular, according to the embodiment of the present disclosure, it is possible to achieve an advantageous effect that effectively ensures the efficiency and performance of cooling the end turn portion of the coil.

[0039] Moreover, according to the embodiment of the present disclosure, it is possible to achieve an advantageous effect of simplifying the structure and reducing the cost.

[0040] Moreover, according to the embodiment of the present disclosure, it is possible to achieve an advantageous effect of minimizing power consumption and improving energy efficiency. Short description of the drawings Fig. 1 is a view for explaining a motor according to an embodiment of the present disclosure. Fig. 2 is a view for explaining a guide member of the motor according to the embodiment of the present disclosure. Fig. 3 is a view for explaining guide projections of the motor according to the embodiment of the present disclosure. Fig. 4 and Fig. 5 are views for explaining a modified example of the guide member of the motor according to the embodiment of the present disclosure. Fig. 6 to 8 are views for explaining a guide bracket of the motor according to the embodiment of the present disclosure. Detailed description

[0041] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0042] However, the technical spirit of the present disclosure is not limited to some embodiments described herein, but may be implemented in various other forms. One or more of the components of the embodiments may be optionally combined and replaced for use within the scope of the technical spirit of the present disclosure.

[0043] Furthermore, unless otherwise specifically and explicitly defined and stated, the terms used in the embodiments of the present disclosure (including technical and scientific terms) may be interpreted in the meaning commonly understood by a person skilled in the art to which this disclosure relates. The meanings of commonly used terms, such as those defined in dictionaries, may be interpreted taking into account the contextual meanings of the related technology.

[0044] Furthermore, the terms used in the embodiments of the present disclosure are for the purpose of explaining the embodiments and not for the purpose of limiting the present disclosure.

[0045] In this specification, unless expressly stated otherwise, a singular form may also include a plural form. The phrase "at least one (or one or more) of A, B, and C" may include one or more of all combinations that can be formed by combining A, B, and C.

[0046] In addition, terms such as “first,” “second,” “A,” “B,” “a,” and “b” may be used to describe components of the embodiments of the present disclosure.

[0047] These terms are used solely for the purpose of distinguishing one component from another. They do not limit the nature, sequence, or order of the components.

[0048] Furthermore, when a component is described as being “connected,” “coupled,” or “attached” to another component, a component may be directly connected, coupled, or attached to another component or may be connected, coupled, or attached to another component by means of another component element interposed therebetween.

[0049] Furthermore, the expression "a component is provided or arranged above (on) or below (under) another component" includes not only a case where the two component elements are in direct contact with each other, but also a case where one or more other component elements are provided or arranged between the two component elements. The expression "above (on) or below (under)" can mean both a downward direction and an upward direction based on a component element.

[0050] With reference to Fig. 1 to 8, a motor 10 according to an embodiment of the present disclosure includes a stator 110, a coil 130 wound around the stator 110, a housing member 120 configured to surround a periphery of the stator 110 and have a cooling medium injection portion 122 through which a cooling medium is injected, guide flow paths 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 one end of the housing member 120 and configured to guide the cooling medium discharged from the guide flow path 140 toward end turn portions 132 of the coil 130 exposed to one end of the stator 110.

[0051] For reference, the motor 10 according to the embodiment of the present disclosure can be applied to various objects according to required conditions and design specifications. The present disclosure is not restricted or limited by the type and characteristics of the object to which the motor 10 is applied.

[0052] For example, the motor 10 according to the embodiment of the present disclosure may be used as a drive motor for a hybrid vehicle or an electric vehicle.

[0053] With reference to Fig. 1 to 3, the stator 110 is arranged to produce an electrical interaction with a rotor (not shown).

[0054] More specifically, the stator 110 may be housed in the housing member 120, and the coil 130 may be wound around the stator 110 and configured to cause electrical interaction between the stator and the rotor.

[0055] More specifically, the stator 110 may include a stator core (not shown) provided with a hollow cylindrical shape.

[0056] The stator core may have various structures in which a plurality of teeth (not shown) are provided along an inner peripheral surface thereof and spaced apart from each other, and slots (not shown) are defined between the teeth. The present disclosure is not restricted or limited by the structure and size (standard) of the stator core.

[0057] For example, the stator core may be manufactured by stacking a plurality of electrical steel sheets in an axial direction of the stator 110. According to another embodiment of the present disclosure, the stator core may be manufactured by using a plurality of split cores that collectively define a ring shape.

[0058] Coil 130 may be made of a typical metal material (e.g., copper) that can define a magnetic path. The present disclosure is not limited or restricted by the material and shape of coil 130.

[0059] For example, a ring-shaped coil 130 having a circular cross-section may be used as the coil 130. According to another embodiment of the present disclosure, a flat coil (also referred to as a square copper wire or a hairpin) having a square cross-section (e.g., a square cross-section) may be used as the coil.

[0060] In the state where the coil 130 is arranged (wound) in the stator 110, the end turn portions 132 of the coil 130 exposed to the outside of the stator 110 (left and right ends of the stator based on an axial direction based on Fig. 1), twisted into a predetermined posture and then welded. For example, end turn portions 132 of the coil 130 exposed to the outside of the stator 110 may be arranged to define an approximately annular shape.

[0061] The rotor is rotated by an electrical interaction between the rotor and the stator 110 and is configured to provide a driving force to the object.

[0062] The rotor may have various structures that can be rotated by the electrical interaction between the rotor and the stator 110. The present disclosure is not restricted or limited by the type and structure of the rotor.

[0063] For example, the rotor may include a rotor core (not shown) and magnets (not shown). The rotor core may have a structure formed by stacking a plurality of circular plates, each of which is in the form of a thin steel sheet or in the form of a container.

[0064] A shaft hole (not shown) may be provided in the center of the rotor, and a shaft may be coupled to the shaft hole.

[0065] Projections (not shown) may protrude from an outer peripheral surface of the rotor core and guide the magnets. The magnets may be attached to the outer peripheral surface of the rotor core and spaced apart from each other at predetermined intervals in a circumferential direction of the rotor core.

[0066] In addition, the rotor may include a container member (not shown) that surrounds the magnets and prevents separation of the magnets.

[0067] The housing member 120 is provided to surround the periphery of the stator 110. The cooling medium injection portion 122 through which the cooling medium is injected is provided in the housing member 120.

[0068] The housing member 120 may include various structures that may surround the periphery of the stator 110. The present disclosure is not restricted or limited by the structure and shape of the housing member 120.

[0069] In particular, the housing member 120 may be provided in an approximately circular cylindrical shape that continuously surrounds a circumference of the coil 130.

[0070] For reference, in the embodiment of the present disclosure illustrated and described above, the example in which the housing member 120 is provided in a cylindrical shape continuously surrounding the periphery of the stator 110 was described. However, according to another embodiment of the present disclosure, the housing member may be configured to partially surround a portion of the periphery of the stator (e.g., have a circular arc shape).

[0071] With reference to the Fig. 1 and Fig. 2, the cooling medium injection portion 122 is formed through a wall surface of the housing member 120 so that the cooling medium is injected into the housing member 120.

[0072] 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 restricted or limited by the type and properties of the cooling medium. The following describes an example in which oil having a lower temperature than the coil 130 is used as the cooling medium.

[0073] The cooling medium injection portion 122 may have various structures capable of injecting the cooling medium. The present disclosure is not restricted or limited by the structure and shape of the cooling medium injection portion 122.

[0074] For example, the cooling medium injection portion 122 may have an approximately circular hole shape and be formed through the wall surface of the housing member 120.

[0075] In particular, the coolant injection section 122 can be provided in an approximately central section of the housing element 120 based on the longitudinal direction of the housing element 120 (the axial direction of the stator).

[0076] As described above, it is possible to achieve an advantageous effect of supplying the coolant, which is injected through the coolant injection section 122, to the end winding sections 132 on two opposite sides of the coil 130 under uniform conditions (e.g., at a uniform temperature and a uniform flow rate), since the coolant injection section 122 is provided in an approximately central section of the housing element 120 based on the axial direction of the stator 110.

[0077] With reference to Fig. 2 to 3, the guide flow paths 140 are defined between the housing member 120 and the stator 110 and arranged to communicate with the cooling medium injection portion 122 and guide the cooling medium injected by the cooling medium injection portion 122 to the end of the stator 110 (the end turn portions of the coil).

[0078] In the embodiment of the present disclosure, the configuration in which the guide flow paths 140 are defined between the housing member 120 and the stator 110 is defined to include both a configuration in which the guide flow paths 140 are formed in an inner surface of the housing member 120 or an outer surface of the stator 110 and a configuration in which the guide flow paths 140 are formed in the inner surface of the housing member 120 and the outer surface of the stator 110, respectively.

[0079] For example, the motor 10 may include guide grooves 112 provided in the outer surface of the stator 110 in a longitudinal direction of the stator 110, and the guide flow paths 140 may be defined along the guide grooves 112.

[0080] In particular, the guide flow path 140 may have a straight shape in the longitudinal direction of the stator 110. According to another embodiment of the present disclosure, the guide flow path may be formed to be inclined with respect to the longitudinal direction of the stator, or the guide flow path may have a curved shape.

[0081] With the above-mentioned structure, the cooling medium injected by the cooling medium injection portion 122 can move along the guide flow paths 140 to the end turn portions 132 of the coil 130 exposed to the end of the stator 110. As the cooling medium moves along the guide flow paths 140, an entire core portion of the coil 130 (or the stator) and the end turn portions 132 of the coil 130 can be cooled.

[0082] With reference to Fig. 3, the engine 10 according to the exemplary embodiment of the present disclosure may include guide protrusions 114 provided at ends of the guide grooves 112 and configured to define outlet flow paths 114a each having a smaller cross-sectional area than the guide flow path 140.

[0083] For example, the guide protrusions 114 may each be provided on two opposite inner wall surfaces (a first inner wall surface and a second inner wall surface) of the end of the guide groove 112. The outlet flow path 114a, which has a smaller cross-section than the guide flow path 140, may be defined between the facing guide protrusions 114. According to another embodiment of the present disclosure, the guide protrusion may be provided on only one of the two opposite inner wall surfaces of the end of the guide groove.

[0084] 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 finally discharged has a smaller cross-sectional area than the guide flow path 140, so that a discharge velocity of the cooling medium to be discharged along the outlet flow path 114a can be increased based on the Bernoulli principle, and the cooling medium can be sprayed onto the end turn portions 132 of the coil 130. Therefore, it is possible to achieve a beneficial effect of further improving the efficiency and performance of cooling the end turn portions 132 of the coil 130.

[0085] With reference to the Fig. 1 and Fig. 2, the guide element 150 is provided to enable the cooling medium discharged from the guide flow path 140 to have a directionality such that the cooling medium is guided toward the end winding portion 132 of the coil 130. In other words, the guide element 150 is provided to enable the cooling medium discharged from the guide flow path 140 to be supplied in a concentrated manner to the end winding portion 132 of the coil 130.

[0086] The guide member 150 may have various structures that can guide 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 restricted or limited by the structure of the guide member 150.

[0087] According to the exemplary embodiment of the present disclosure, the guide member 150 may include a connecting portion 152 connected to the end of the housing member 120 and a guide portion 154 provided at one end of the connecting portion 152 and configured to guide the cooling medium discharged from the guide flow path 140 toward the end turn portion 132.

[0088] For example, the connecting portion 152 may have an approximately hollow annular shape and be connected to the end of the housing member 120 (e.g., secured by a fastening screw). The guide portion 154 may be bent and integrated with the end of the connecting portion 152 while facing the outlet of the guide flow path 140.

[0089] 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 portions 132 of the coil 130, so that the cooling medium can be concentratedly supplied to the end turn portions 132 of the coil 130. Therefore, it is possible to achieve a beneficial effect of further improving the efficiency of cooling the end turn portions 132 of the coil 130.

[0090] According to the exemplary embodiment of the present disclosure, the guide portion 154 may be provided to be inclined with respect to the connecting portion 152 such that the guide portion 154 is directed toward the end turn portion 132.

[0091] In this case, the configuration in which the guide portion 154 is provided to be inclined with respect to the connecting portion 152 can be understood as a configuration in which the guide portion 154 is arranged to be inclined at a predetermined angle with respect to a radial direction of the stator 110.

[0092] An angle of the guide portion 154 with respect to the connecting 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 restricted or limited by the angle of the guide portion 154 with respect to the connecting portion 152.

[0093] As described above, in the embodiment of the present disclosure, the guide portion 154 is provided to be inclined with respect to the connecting portion 152. Therefore, it is possible to achieve an advantageous effect by minimizing a situation where the cooling medium discharged from the guide flow path 140 scatters backward in random directions when the cooling medium comes into contact with the guide portion 154. Furthermore, it is possible to achieve an advantageous effect by more accurately controlling a spray direction of the cooling medium toward the end turn portion 132 of the coil 130.

[0094] Furthermore, the engine 10 according to the exemplary embodiment of the present disclosure may be configured with reference to Fig. 2, comprise an inclined guide portion 124 provided integrally with the end of the housing member 120 and configured to guide the cooling medium discharged from the guide flow path 140 toward the end turn portions 132.

[0095] For example, the above-mentioned guide member 150 may be provided at one end (the left end based on Fig. 6) of the housing member 120 and the inclined guide portion 124 may be connected to the other end (the right end based on Fig. 6) of the housing element 120.

[0096] For example, the inclined guide portion 124 and the housing member 120 may be formed as a unitary one-piece structure by partially machining the end of the housing member 120.

[0097] An angle of the inclined guide portion 124 can be changed variously depending on the structure and specifications of the end turn portion 132 of the coil 130. The present disclosure is not restricted or limited by the angle of the inclined guide portion 124.

[0098] As described above, in the embodiment of the present disclosure, the inclined guide portion 124 is provided at the end of the housing member 120. Therefore, it is possible to achieve an advantageous effect by more accurately controlling the spray direction of the cooling medium discharged from the guide flow path 140 toward the end turn portion 132 of the coil 130.

[0099] In the embodiment of the present disclosure illustrated and described above, the example in which the guide portion 154 is provided so as to be inclined with respect to the connecting portion 152 has been described. However, according to another embodiment of the present disclosure, the guide portion may extend in a radial direction of the connecting portion.

[0100] This means that the guide element 150, with reference to the Fig. 4 and Fig. 5, a connecting portion 152' connected to the end of the stator 110, and a guide portion 154' provided at one end of the connecting portion 152' and configured to guide the cooling medium discharged from the guide flow path 140 to the end winding portion 132. The guide portion 154' may extend in a radial direction of the connecting portion 152' (the radial direction of the stator) and be arranged to cover the outlet of the guide flow path 140.

[0101] Furthermore, the engine 10, with reference to Fig. 4, according to the exemplary embodiment of the present disclosure, may include guide apertures 156 provided on an inner peripheral surface of the guide portion 154' and protruding in the longitudinal direction of the housing member 120.

[0102] The guide aperture 156 may be provided to be inclined at a predetermined angle with respect to a radial direction of the guide member 150. The present disclosure is not restricted or limited by the arrangement angle of the guide aperture 156.

[0103] In particular, the guide apertures 156 may be provided as a plurality of guide apertures 156 which are spaced apart from one another in the circumferential direction of the guide element 150.

[0104] As described above, in the embodiment of the present disclosure, the guide orifices 156 are provided on the inner peripheral surface of the guide portion 154', so that the cooling medium discharged from the guide flow path 140 can be guided to the end turn portion 132 of the coil 130 without stagnating on the inner peripheral surface of the guide portion 154' or flowing downward in a circumferential direction of the guide portion 154' toward a lower end (a lower end based on a gravity direction) of the guide portion 154'. Therefore, it is possible to achieve an advantageous effect by more accurately controlling the supply direction of the cooling medium toward the direction toward the end turn portion 132 of the coil 130.

[0105] With reference to Fig. 6 to 8, the motor 10 according to the exemplary embodiment of the present disclosure may include guide brackets 160 provided at the ends of the guide grooves 112 and configured to guide the cooling medium toward the end winding portions 132.

[0106] The guide bracket 160 is provided to enable the cooling medium discharged from the guide flow path 140 to have a directionality such that the cooling medium is guided toward the end winding sections 132 of the coil 130. In other words, the guide element 150 is provided to enable a concentrated supply of the cooling medium discharged from the guide flow path 140 to the end winding sections 132 of the coil 130.

[0107] An example is described below in which the guide clamps 160 are each provided at two opposite ends of the guide flow path 140.

[0108] The guide bracket 160 may have various structures that can guide 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 restricted or limited by the structure of the guide bracket 160.

[0109] According to the exemplary embodiment of the present disclosure, the guide bracket 160 may include a head portion 161 provided at one end of the guide groove 112, a first leg portion 163 connected to one end of the head portion 161 and supported on the 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 the 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 toto guide the cooling medium towards the end winding section 132.,

[0110] For example, the head portion 161, the first leg portion 163, and the second leg portion 164 may be connected to form an approximately “U” shape.

[0111] For example, the head portion 161, the first leg portion 163, and the second leg portion 164 may each be made of a typical plastic material. The first leg portion 163 and the second leg portion 164 may be supported by the head portion 161 and configured to be elastically movable in directions in which the first leg portion 163 and the second leg portion 164 move toward and away from each other relative to the head portion 161.

[0112] The discharge flow path 165 may have various structures that can guide the cooling medium moving along the guide flow path 140 to the inner surface of the head portion 161. The present disclosure is not restricted or limited by the structure and shape of the discharge flow path 165.

[0113] In particular, the discharge flow path 165 may be defined to have a cross-sectional area extending in a direction from an inlet (a right side based on Fig. 7) adjacent to a central portion of the stator 110, to an outlet (a left side based on Fig. 7) gradually decreases.

[0114] 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 to the outlet, so that a discharge velocity of the cooling medium to be discharged through the outlet of the discharge flow path 114a can be increased based on the Bernoulli principle, and the cooling medium can be sprayed onto the inner surface (inclined portion) of the head portion 161. Therefore, it is possible to achieve a beneficial effect of further improving the efficiency and performance of cooling the end turn portion 132 of the coil 130.

[0115] The inclined portion 162 is provided to guide the cooling medium that has flowed through the discharge flow path 165 toward the end turn portion 132 of the coil 130 (e.g., the inclined portion 162 is provided to guide the cooling medium in a direction that is inclined downward with respect to the outlet of the discharge flow path 165).

[0116] An 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 restricted or limited by the angle of the inclined portion 162.

[0117] For example, the inclined portion 162 may have a curved shape. Alternatively, the inclined portion may have a flat shape or other shapes.

[0118] As described above, in the embodiment of the present disclosure, the inclined portion 162 is provided on the inner surface of the head portion 161. Therefore, it is possible to achieve an advantageous effect by more accurately controlling the spray direction of the cooling medium discharged from the discharge flow path 165 toward the end turn portion 132 of the coil 130.

[0119] According to the exemplary embodiment of the present disclosure, the motor 10 may include stopper projections 166 protruding from side surfaces of the head portion 161.

[0120] The stop projections 166 are provided to prevent the guide bracket 160 from excessively penetrating the guide groove 112 when the guide bracket 160 penetrates the guide groove 112.

[0121] The stop protrusion 166 may have various structures capable of being retained by the end of the stator 110 in the longitudinal direction of the stator 110. The present disclosure is not restricted or limited by the structure and shape of the stop protrusion 166.

[0122] For example, the stop projections 166 may be provided symmetrically on two opposite surfaces of the head portion 161 and each have an approximately square projection shape.

[0123] Furthermore, the motor 10 according to the exemplary embodiment of the present disclosure may include retaining grooves 116a provided in at least one of the first inner wall surfaces and the second inner wall surfaces, and retaining projections 167 provided on at least one of the first leg portion 163 and the second leg portion 164 and configured to be retained by the retaining grooves 116a.

[0124] An example will be described below in which the retaining projections 167 are provided on the first leg portion 163 and the second leg portion 164, respectively, and the retaining grooves 116a receiving the retaining projections 167 are provided in the first inner wall surface and the second inner wall surface, respectively.

[0125] The retaining grooves 116a and the retaining projections 167 are provided to prevent the separation of the guide bracket 160 while ensuring the state in which the guide bracket 160 is disposed in the guide groove 112. The present disclosure is not restricted or limited by the structures and shapes of the retaining groove 116a and the retaining projection 167.

[0126] For example, the retaining groove 116a may have an approximately square groove shape and the retaining projection 167 may have an approximately triangular shape.

[0127] The retaining projections 167 can be moved along the first inner wall surface and the second inner wall surface and then retained by the retaining grooves 116a in a snap-fit ​​manner by the elastic movements of the first and second leg portions 163 and 164 relative to the head portion 161.

[0128] Although the embodiments have been described above, the embodiments are for illustrative purposes only and are not intended to limit the present disclosure. It will be apparent to those skilled in the art that various modifications and applications not described above can be made to the present embodiment without departing from the essential features of the present embodiment. For example, the respective components specifically described in the embodiments can be modified and then implemented. Furthermore, it should be understood that the differences in the modifications and applications are included within the scope of the present disclosure, which is defined by the appended claims. Reference numerals for each of the elements in the figures 10 Engine 110 Stator 112 guide groove 114 Leading edge 114a Outlet flow path 116 Retaining groove 120 housing element 122 Cooling medium injection section 124 inclined guide section 130 coil 132 End turn section 140 Guide flow path 150, 150' guide element 152, 152' connecting section 154, 154' guide section 156 guide panel 160 guide clamp 161 head section 162 inclined section 163 first leg section 164 second leg section 165 Discharge flow path 166 stop projection 167 Retaining projection QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2024-0024466

[0001]

Claims

[1] Engine comprising: a stator; a coil wound around the stator; a housing member provided to surround 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 arranged to communicate with the cooling medium injection portion and guide the cooling medium; and a guide member provided at one end of the housing member and configured to guide the cooling medium discharged from the guide flow path toward an end turn portion of the coil exposed to one end of the stator. [2] The motor of claim 1, wherein the guide member comprises: a connecting portion connected to the end of the housing member; and a guide portion provided at one end of the connecting portion and configured to guide the cooling medium discharged from the guide flow path toward the end turn portion of the coil. [3] A motor according to claim 2, wherein the guide portion is provided to be inclined with respect to the connecting portion and directed toward the end turn portion of the coil. [4] Engine according to claim 2 or 3, comprising: a guide aperture provided on an inner peripheral surface of the guide portion and projecting in a longitudinal direction of the housing member. [5] Engine according to one of claims 1 to 4, comprising: an inclined guide portion provided integrally with the end of the housing member and configured to guide the cooling medium discharged from the guide flow path toward the end turn portion of the coil. [6] Engine according to one of claims 1 to 5, comprising: a guide groove provided 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. [7] Engine according to claim 6, comprising: a guide projection provided at one end of the guide groove and configured to define an outlet flow path having a smaller cross-sectional area than the guide flow path. [8] Engine according to claim 6 or 7, comprising: a guide bracket provided at one end of the guide groove and configured to guide the cooling medium toward the end turn portion of the coil. [9] The motor of claim 8, wherein the guide bracket comprises: a head portion provided at the end 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 another 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 guide the cooling medium moving along the guide flow path to an inner surface of the head portion; and an inclined portion provided on the inner surface of the head portion and configured to guide the cooling medium toward the end turn portion of the coil. [10] An engine according to claim 9, wherein the discharge flow path is defined to have a cross-sectional area that gradually decreases from an inlet to an outlet.

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