Motor cooling components

Abstract

A motor cooling component is provided, which can achieve equalization of the amount of oil sprayed from a plurality of spray ports. The motor cooling component comprises: an oil supply port (31) for supplying oil; a plurality of spray ports (60) for spraying oil toward the motor; a main oil passage (80) connected to the oil supply port (31); and a plurality of derived oil passages (90) branched from the main oil passage (80) in a manner corresponding to the plurality of spray ports (60), the plurality of derived oil passages (90) being formed to connect the main oil passage (80) and the spray ports (60) and being formed to have mutually different shapes.

Description

Technical Field

[0001] The present invention relates to a technology for a cooling member of a motor capable of supplying oil to the motor for cooling. Background Art

[0002] Conventionally, there is known a technique related to a structure for cooling a motor by supplying oil to the motor. For example, Patent Document 1 describes the following.

[0003] Patent document 1 describes an oil cooling structure of a motor that cools a coil by spraying oil toward the coil of the motor. Specifically, a circular ring-shaped circumferential oil passage extending along the circumference of the motor is formed on the inner side surface of the housing of the motor described in patent document 1. In addition, a plurality of injection holes for spraying the oil circulating in the circumferential oil passage toward the coil are formed on a component (oil passage cover) covering the circumferential oil passage. In the oil cooling structure described in patent document 1, the coil is cooled by spraying the oil circulating in the circumferential oil passage toward the coil from the plurality of injection holes.

[0004] However, in the technology described in Patent Document 1, the oil supplied from the oil inlet connected to a part of the circumferential oil passage circulates in the circumferential oil passage. The pressure loss of the oil increases as it circulates in the circumferential oil passage. Therefore, the farther the injection hole is from the oil inlet, the lower the injection pressure of the oil, and the lower the oil ejection amount. In this way, generally speaking, the oil ejection amount changes according to the oil circulation path, so a technology for arbitrarily adjusting the ejection amount is required.

[0005] Patent Document 1: Japanese Patent No. 5347380 Summary of the invention

[0006] The present invention has been made in view of the above-mentioned situation, and an object of the present invention is to provide a cooling member for a motor capable of arbitrarily adjusting the amount of oil ejected from a plurality of ejection ports.

[0007] The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below.

[0008] The cooling component of the motor of the present invention comprises: an oil supply port, which supplies oil; a plurality of ejection ports, which eject oil toward the motor; a main oil circuit, which is connected to the oil supply port; and a plurality of derivative oil circuits, which are branched from the main oil circuit in a manner corresponding to the plurality of ejection ports, respectively, and the plurality of derivative oil circuits are formed to connect the main oil circuit and the ejection ports and are formed in shapes different from each other.

[0009] In the motor cooling member of the present invention, the plurality of branch oil passages are formed in such a shape that the pressure loss of the flowing oil increases as the distance from the oil supply port increases.

[0010] In the motor cooling member of the present invention, the plurality of derived oil passages are different in at least one of length in the oil circulation direction, number of bent portions, or cross-sectional shape perpendicular to the oil circulation direction.

[0011] In the cooling member for a motor of the present invention, the plurality of discharge ports are arranged so as to face an axial end surface of the motor and are arranged at positions different from each other in a radial direction of the motor.

[0012] In the cooling member for a motor according to the present invention, the plurality of discharge ports are arranged to face a radially outer side surface of the motor.

[0013] The present invention has the following effects.

[0014] In the motor cooling member of the present invention, the amount of oil ejected from the plurality of ejection ports can be arbitrarily adjusted.

[0015] In the motor cooling member of the present invention, it is possible to equalize the amount of oil ejected from the plurality of ejection ports.

[0016] In the cooling member for a motor according to the present invention, it is possible to provide differences in the pressure losses of the plurality of derivative oil passages.

[0017] In the cooling member for a motor of the present invention, any position of the motor can be cooled.

[0018] In the cooling member for a motor of the present invention, the motor can be cooled from the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic side cross-sectional view of a motor having the cooling member according to the first embodiment.

[0020] Figure 2 It is a front view showing the cooling member.

[0021] Figure 3 (a) is a side exploded view showing a cooling component. Figure 3 (b) is a rear view showing the cooling component.

[0022] Figure 4 This is a front view showing an oil passage formed in the second plate portion and the flow of oil flowing in the oil passage.

[0023] Figure 5 It is an enlarged front view showing the first derived oil passage.

[0024] Figure 6 It is an enlarged front view showing the second derived oil passage and the third derived oil passage.

[0025] Figure 7It is a rear view showing a cooling member according to the second embodiment.

[0026] Figure 8 This is a front view showing the relative positional relationship of the discharge port with respect to the coil.

[0027] Fig. 9 It is a schematic side cross-sectional view of a motor having a cooling member according to a third embodiment.

[0028] Description of symbols

[0029] 1: Motor; 4: Coil; 4a: Coil end; 10: Cooling component; 31: Oil supply port; 60: Spray port; 80: Main oil circuit; 90: Derived oil circuit. DETAILED DESCRIPTION

[0030] In the following, the directions indicated by arrows U, D, F, B, L, and R in the drawings are defined as upward, downward, forward, backward, left, and right directions, respectively.

[0031] First, use Figure 1 The outline of the structure of the motor 1 including the cooling member 10 according to the first embodiment of the present invention will be described.

[0032] The motor 1 of this embodiment is used for a driving device of an automobile (hybrid vehicle (HV) or electric vehicle (EV) etc.) The motor 1 mainly includes a housing 2 , a stator 3 , a coil 4 , a rotor 5 , a rotating shaft 6 , and a cooling member 10 .

[0033] The housing 2 accommodates other components (such as the stator 3) constituting the motor 1. The stator 3 is fixed to the inner side of the housing 2. The stator 3 is formed in a roughly cylindrical shape. The stator 3 is arranged in a manner with its axis facing the front-to-back direction. A coil 4 is formed on the stator 3 by winding a conductive wire. The coil 4 is formed in a cylindrical shape concentric with the stator 3. The front and rear ends of the coil 4 (hereinafter referred to as "coil ends 4a") are arranged in a manner protruding from the front and rear ends of the stator 3, respectively.

[0034] The rotor 5 is formed in a substantially cylindrical shape. The rotor 5 is arranged inside the stator 3. The rotor 5 is arranged in such a way that the axis thereof faces the front-rear direction. The rotating shaft 6 is arranged in such a way that the axis thereof faces the front-rear direction and passes through the center of the rotor 5. The rotating shaft 6 is rotatably arranged in the housing 2 via a bearing. The rotor 5 and the rotating shaft 6 are arranged on the same axis (concentrically) as the stator 3 and the coil 4.

[0035] The cooling component 10 cools the coil 4 by supplying oil to the motor 1 (the coil 4 in this embodiment). The cooling component 10 is formed in a roughly annular plate shape. The cooling component 10 is arranged in a manner roughly perpendicular to the axis of the motor 1. Thus, the cooling component 10 is arranged so that the plate surface is along a roughly vertical direction (the plate surface is oriented in a roughly horizontal direction). The cooling component 10 is arranged in a manner opposite to the axial end surface of the coil 4. Specifically, the cooling component 10 is arranged just in front of (in front of) the coil end 4a on the front side.

[0036] In the motor 1 configured as above, when the coil 4 is energized, a magnetic field is generated on the stator 3. When the magnetic field is generated on the stator 3, a rotational force is generated on the rotor 5 by the magnetic field, and the rotor 5 and the rotating shaft 6 rotate.

[0037] When the coil 4 is energized, the coil 4 generates heat due to internal resistance. In the present embodiment, the coil 4 is cooled by supplying oil from the cooling member 10 to the coil 4, thereby suppressing the occurrence of malfunctions (such as a decrease in efficiency).

[0038] Below, use Figures 2 to 6 The structure of the cooling member 10 will be described in detail.

[0039] The cooling member 10 is used to supply oil to the coil 4. The cooling member 10 is formed by fixing the first plate portion 20 and the second plate portion 40 to each other. Hereinafter, the first plate portion 20 and the second plate portion 40 will be described in detail.

[0040] Figure 2 and Figure 3 The first plate portion 20 shown is a member forming the front side portion of the cooling member 10. The first plate portion 20 is formed in a substantially annular plate shape with the plate surface facing the front-rear direction. The first plate portion 20 is mainly formed with a protrusion 30.

[0041] The protrusion 30 is a portion protruding forward from the first plate portion 20. The protrusion 30 is formed at the upper end of the first plate portion 20. The protrusion 30 is formed in a substantially cylindrical shape with its axis facing the front-rear direction. The protrusion 30 is formed with an oil supply port 31.

[0042] The oil supply port 31 is a portion for receiving the supplied oil into the cooling member 10. The oil supply port 31 is formed to penetrate the center of the protruding portion 30 in the front-rear direction.

[0043] Figure 3The second plate portion 40 shown is a component that forms the rear portion of the cooling component 10. The second plate portion 40 is formed into a roughly annular plate shape with the plate surface facing the front-to-back direction. The outer shape of the second plate portion 40 when viewed from the front (viewed from the rear) is formed to be roughly the same as the first plate portion 20. The second plate portion 40 is mainly provided with a fixing portion 50, a spray port 60, a connecting oil passage 70, a main oil passage 80, and a derived oil passage 90. In addition, the circumferential direction of the second plate portion 40 is sometimes referred to as the "circumferential direction" and the radial direction of the second plate portion 40 is sometimes referred to as the "radial direction".

[0044] The fixing portion 50 is a portion for fixing the second plate portion 40 to the housing 2. The fixing portion 50 is formed to protrude from the second plate portion 40 toward the rear. Three fixing portions 50 are formed at equal intervals (every 120 degrees when viewed from the front (rear)) on the outer periphery of the second plate portion 40. The fixing portion 50 is formed in a plate shape that is bent in a substantially L-shape.

[0045] The jet port 60 is a portion that sprays the oil provided via the oil path (connecting oil path 70, etc.) described later toward the coil end 4a. The jet port 60 is formed to penetrate the second plate portion 40 from front to back. A plurality of jet ports 60 are formed at equal intervals on the same circumference (on an imaginary circle C whose center coincides with the second plate portion 40) along the circumference of the second plate portion 40. In the present embodiment, eight jet ports 60 are formed at intervals of 45 degrees along the circumference of the second plate portion 40. A plurality of jet ports 60 are formed at approximately the center of the radial width of the second plate portion 40 (approximately in the middle of the outer periphery and the inner periphery of the second plate portion 40). A plurality of jet ports 60 are arranged in a left-right symmetrical manner across the connecting oil path 70 described later.

[0046] In the present embodiment, for the sake of convenience of explanation, the left and right pair of nozzles 60 arranged at the top among the multiple nozzles 60 is called the first nozzle 61, the left and right pair of nozzles 60 arranged below the first nozzle 61 is called the second nozzle 62, the left and right pair of nozzles 60 arranged below the second nozzle 62 is called the third nozzle 63, and the left and right pair of nozzles 60 arranged at the bottom is called the fourth nozzle 64.

[0047] The position of the ejection port 60 formed on the right side of the second plate portion 40 is described in more detail. The first ejection port 61 is formed at a position displaced 22.5 degrees in the clockwise direction when viewed from the front with reference to the vertical upper side of the second plate portion 40. The second ejection port 62 is formed at a position displaced 45 degrees in the clockwise direction when viewed from the front from the first ejection port 61. The third ejection port 63 is formed at a position displaced 45 degrees in the clockwise direction when viewed from the front from the second ejection port 62. The fourth ejection port 64 is formed at a position displaced 45 degrees in the clockwise direction when viewed from the front from the third ejection port 63.

[0048] Figure 4 The connecting oil passage 70, the main oil passage 80, and the derived oil passage 90 shown are oil passages for guiding the oil supplied from the oil supply port 31 of the first plate portion 20 to the ejection port 60. The connecting oil passage 70, the main oil passage 80, and the derived oil passage 90 are formed by recessing the front surface of the second plate portion 40. In the present embodiment, the connecting oil passage 70, the main oil passage 80, and the derived oil passage 90 are formed to have substantially the same width and depth (same cross-sectional shape). The following will describe each oil passage in detail.

[0049] The communication oil passage 70 is an oil passage connecting the oil supply port 31 of the first plate portion 20 and the main oil passage 80. The communication oil passage 70 is formed to extend vertically linearly from the upper end portion of the second plate portion 40 (a position opposite to the oil supply port 31) toward the inner periphery of the second plate portion 40.

[0050] Figure 4 and Figure 5 The main oil circuit 80 shown is an oil circuit that guides the oil provided from the connecting oil circuit 70 along the circumferential direction of the second plate portion 40. The main oil circuit 80 is formed to branch to the left and right from the lower end of the connecting oil circuit 70. The main oil circuit 80 is formed in a roughly circular arc shape along the circumferential direction of the second plate portion 40. The main oil circuit 80 is formed to pass through the inner side of the first nozzle 61, the second nozzle 62, and the third nozzle 63. In addition, the left and right lower ends of the main oil circuit 80 are formed to be connected to the left and right fourth nozzles 64, respectively. The left and right lower ends of the main oil circuit 80 are formed not to be connected to each other. As a result, the main oil circuit 80 is formed in a roughly C-shape when viewed from the front that opens downward. The main oil circuit 80 is formed in a shape that is symmetrical on both sides of the connecting oil circuit 70 (refer to Figure 2 and Figure 3 ).

[0051] The derived oil passage 90 is formed to branch from the main oil passage 80 and connect the main oil passage 80 and the ejection port 60. A plurality of derived oil passages 90 are formed corresponding to the plurality of ejection ports 60. In the present embodiment, six derived oil passages 90 are formed corresponding to the first ejection port 61, the second ejection port 62, and the third ejection port 63 (see FIG. Figure 2 and Figure 3 ).

[0052] In the present embodiment, for the sake of convenience, the pair of left and right derived oil passages 90 connected to the first ejection port 61 is referred to as the first derived oil passage 91, the pair of left and right derived oil passages 90 connected to the second ejection port 62 is referred to as the second derived oil passage 92, and the pair of left and right derived oil passages 90 connected to the third ejection port 63 is referred to as the third derived oil passage 93. Hereinafter, each derived oil passage 90 will be described in detail.

[0053] The pair of left and right derived oil passages 90 are formed in a left-right symmetrical shape across the communication oil passage 70. Therefore, the right derived oil passage 90 will be specifically described below, and the description of the left derived oil passage 90 will be appropriately omitted.

[0054] Figure 4 and Figure 5 The first derived oil passage 91 shown connects the main oil passage 80 and the first ejection port 61. The first derived oil passage 91 is described below by being divided into a plurality of parts (introduction portion 91a, first arcuate portion 91b, second arcuate portion 91c, curved portion 91d, third arcuate portion 91e, and connecting portion 91f).

[0055] The introduction portion 91a is a portion extending linearly from the main oil passage 80 toward the radially outer side. One end (the radially inner end) of the introduction portion 91a is connected to the upper right portion (circumferentially between the first ejection port 61 and the second ejection port 62) of the main oil passage 80. The other end side (the radially outer side) of the introduction portion 91a is extended to the approximate center of the radial width of the second plate portion 40.

[0056] The first arc-shaped portion 91b is a portion extending in an arc shape from the introduction portion 91a. One end of the first arc-shaped portion 91b is connected to the other end (radially outer end) of the introduction portion 91a. The other end side of the first arc-shaped portion 91b extends toward the side opposite to the first ejection port 61 (clockwise side when viewed from the front). The first arc-shaped portion 91b is formed along the circumferential direction of the second plate portion 40.

[0057] The second arc-shaped portion 91c is a portion extending in an arc shape outside the first arc-shaped portion 91b. One end of the second arc-shaped portion 91c is connected to the other end of the first arc-shaped portion 91b (the end on the clockwise side when viewed from the front) in a folded manner. The other end side of the second arc-shaped portion 91c extends in the counterclockwise direction when viewed from the front. The second arc-shaped portion 91c is formed along the circumferential direction of the second plate portion 40.

[0058] The curved portion 91d is formed to be bent into an appropriate shape. The curved portion 91d is formed to be bent into a substantially U-shape opening radially outward when viewed from the front. One end of the curved portion 91d is connected to the other end of the second arc-shaped portion 91c (the end on the counterclockwise side when viewed from the front).

[0059] The third arc-shaped portion 91e is a portion extending in an arc shape from the curved portion 91d. One end of the third arc-shaped portion 91e is connected to the other end of the curved portion 91d. The other end side of the third arc-shaped portion 91e extends in the counterclockwise direction when viewed from the front. The third arc-shaped portion 91e is formed along the circumferential direction of the second plate portion 40.

[0060] The communicating portion 91f is a portion communicating with the first discharge port 61. One end of the communicating portion 91f is connected to the other end of the third arc-shaped portion 91e. The other end of the communicating portion 91f extends linearly toward the first discharge port 61 and is connected to the first discharge port 61.

[0061] The first derived oil passage 91 has a bent portion (bent portion) formed in a portion where the respective portions (the introduction portion 91 a and the like) are connected to each other. That is, the first derived oil passage 91 has bent portions formed at a plurality of locations.

[0062] Figure 4 and Figure 6 The second derived oil passage 92 shown is connected to the main oil passage 80 and the second discharge port 62. Hereinafter, the second derived oil passage 92 will be described by being divided into a plurality of parts (an introduction part 92a and an arc-shaped part 92b).

[0063] The introduction portion 92a is a portion extending linearly from the main oil passage 80 toward the radially outer side. One end (the radially inner end) of the introduction portion 92a is connected to the lower right portion (circumferentially between the second ejection port 62 and the third ejection port 63) of the main oil passage 80. The other end side (the radially outer side) of the introduction portion 92a is extended to the approximate center of the radial width of the second plate portion 40.

[0064] The arc-shaped portion 92b is a portion extending in an arc shape from the introduction portion 92a. One end of the arc-shaped portion 92b is connected to the other end (radially outer end) of the introduction portion 92a. The other end of the arc-shaped portion 92b is connected to the second ejection port 62. The arc-shaped portion 92b is formed along the circumferential direction of the second plate portion 40.

[0065] The second derived oil passage 92 has a bent portion formed in a portion where the respective portions (the introduction portion 92a and the arc-shaped portion 92b) are connected to each other. That is, the second derived oil passage 92 has a bent portion formed at one location.

[0066] The third derived oil passage 93 connects the main oil passage 80 and the third discharge port 63. Hereinafter, the third derived oil passage 93 will be described by being divided into a plurality of parts (an introduction portion 93a and an arc-shaped portion 93b).

[0067] The introduction portion 93a is a portion extending linearly from the main oil passage 80 toward the radially outer side. One end (the radially inner end) of the introduction portion 93a is connected to the lower right portion (the position closer to the clockwise side than the third ejection port 63 in the circumferential direction) of the main oil passage 80. The other end side (the radially outer side) of the introduction portion 93a is extended to the approximate center of the radial width of the second plate portion 40.

[0068] The arc-shaped portion 93b is a portion extending in an arc shape from the introduction portion 93a. One end of the arc-shaped portion 93b is connected to the other end (radially outer end) of the introduction portion 93a. The other end of the arc-shaped portion 93b is connected to the third ejection port 63. The arc-shaped portion 93b is formed along the circumferential direction of the second plate portion 40. The arc-shaped portion 93b of the third derived oil passage 93 is formed shorter than the arc-shaped portion 92b of the second derived oil passage 92.

[0069] The third derived oil passage 93 has a bent portion formed in a portion where the respective portions (the introduction portion 93a and the arc-shaped portion 93b) are connected to each other. That is, the third derived oil passage 93 has a bent portion formed at one location.

[0070] As described above, the first derived oil passage 91 , the second derived oil passage 92 , and the third derived oil passage 93 are formed in shapes different from each other.

[0071] like Figure 2 and Figure 3 As shown, the cooling member 10 is formed by fixing the back surface of the first plate portion 20 and the front surface of the second plate portion 40 to each other. As a result, the oil passages (the connecting oil passage 70, the main oil passage 80, and the derived oil passage 90) formed on the front surface of the second plate portion 40 are covered by the first plate portion 20 from the front.

[0072] Next, a case where the coil 4 is cooled using the above-mentioned cooling member 10 will be described.

[0073] like Figure 1 As shown, the cooling member 10 is arranged in a vertically upright state on the front side of the coil 4 (the coil end 4a on the front side). The cooling member 10 is arranged on the same axis as the coil 4. By arranging the cooling member 10 in this way, the ejection port 60 formed in the cooling member 10 is arranged to be opposite to the coil end 4a in front and back.

[0074] Oil is supplied to the oil supply port 31 of the cooling member 10 by an oil pump (not shown). Figure 4 As shown, the oil is guided to the upper end of the main oil circuit 80 via the connecting oil circuit 70, and flows along the main oil circuit 80 by branching to the left and right. The oil flowing in the main oil circuit 80 branches to a plurality of derivative oil circuits 90 (a first derivative oil circuit 91, a second derivative oil circuit 92, and a third derivative oil circuit 93) connected to the main oil circuit 80 and flows. In this way, the oil is guided to the first ejection port 61, the second ejection port 62, and the third ejection port 63 via a plurality of derivative oil circuits 90. In addition, the oil flowing to the downstream end (lower end) of the main oil circuit 80 is guided to the fourth ejection port 64. The oil guided to each ejection port 60 is ejected toward the rear via the ejection port 60. Thus, oil can be provided to the coil end 4a arranged at the rear of the cooling component 10, so that the coil 4 can be cooled by the oil (refer to Figure 1 ).

[0075] Here, generally speaking, the longer the circulation distance is, the greater the pressure loss of the oil circulating in the oil circuit is. For example, as in Patent Document 1, when a plurality of ejection ports (injection holes) are formed along the circumferential oil circuit, since the distances from the oil inlet to each ejection port are different, the closer the ejection port is to the oil inlet, the higher the ejection pressure of the oil, and the farther the ejection port is from the oil inlet, the lower the ejection pressure of the oil. In this way, if the ejection pressures of the ejection ports are different, the ejection amount of the oil from the ejection ports is also different, and therefore the coil end 4a may not be cooled as desired.

[0076] Therefore, the cooling member 10 of the present embodiment forms a plurality of branch oil passages 90 having different shapes, thereby arbitrarily adjusting the amount of oil ejected from each ejection port 60 .

[0077] Specifically, the first derived oil passage 91 connected to the most upstream side (the portion closest to the oil supply port 31) of the main oil passage 80 among the derived oil passages 90 is formed to bend multiple times and has the longest total length compared to the other derived oil passages 90 (the second derived oil passage 92 and the third derived oil passage 93). With such a configuration, the pressure loss of the oil flowing in the first derived oil passage 91 is greater than the pressure loss of the oil flowing in the other derived oil passages 90.

[0078] In addition, in the trunk oil passage 80, the second derived oil passage 92 connected to the downstream side of the first derived oil passage 91 is formed in a shape similar to the third derived oil passage 93 connected to the downstream side, but is formed to have a longer overall length than the third derived oil passage 93. With such a configuration, the pressure loss of the oil flowing through the second derived oil passage 92 is greater than the pressure loss of the oil flowing through the third derived oil passage 93.

[0079] Furthermore, oil is directly supplied from the main oil passage 80 to the fourth discharge port 64 without passing through the above-mentioned derived oil passage 90. That is, the derived oil passage 90 which increases the pressure loss of oil supplied to the fourth discharge port 64 farthest from the oil supply port 31 is not provided.

[0080] Thus, in the present embodiment, the pressure loss of the oil supplied to each ejection port 60 is made different by using the derived oil passages 90 with different shapes, thereby arbitrarily adjusting the amount of oil ejected from each ejection port 60. Specifically, the derived oil passage 90 is shaped so as to cause a greater pressure loss to the oil flowing inside as it is closer to the oil supply port 31, thereby achieving equalization of the ejection pressure of the oil at each ejection port 60. Thus, the amount of oil ejected from each ejection port 60 can be equalized.

[0081] As described above, the cooling member 10 of the motor 1 of this embodiment has:

[0082] an oil supply port 31 for supplying oil;

[0083] a plurality of spray ports 60 that spray oil toward the motor 1 (more specifically, the coil 4 of the motor 1);

[0084] a main oil passage 80 connected to the oil supply port 31; and

[0085] A plurality of derived oil passages 90 are branched from the main oil passage 80 so as to correspond to the plurality of ejection ports 60 , respectively, and are formed to connect the main oil passage 80 and the ejection ports 60 , and are formed to have mutually different shapes.

[0086] By configuring in this way, the amount of oil ejected from the plurality of ejection ports 60 can be adjusted arbitrarily. That is, by using the derived oil passages 90 of different shapes, the pressure loss of the oil supplied to each ejection port 60 can be adjusted. For example, by appropriately determining the shape of the derived oil passages 90 according to the positions of the ejection ports 60 and each oil passage, the amount of oil ejected from the ejection ports 60 (ejection amount) can be made equal.

[0087] Furthermore, the plurality of branch oil passages 90 are formed in such a shape that the pressure loss of the oil flowing therethrough increases as the distance from the oil supply port 31 increases.

[0088] By configuring in this way, it is possible to achieve equalization of the amount of oil ejected from the plurality of ejection ports 60. That is, generally speaking, the closer the distance from the oil supply port 31 to the ejection port 60 is, the smaller the pressure loss is, and the greater the amount of oil ejected from the ejection port 60 is. Therefore, by forming the derived oil passage 90 in a shape in which the pressure loss is greater as it is closer to the oil supply port 31, it is possible to achieve equalization of the pressure loss, and further, it is possible to achieve equalization of the amount of oil ejected.

[0089] Furthermore, the plurality of derived oil passages 90 are different in at least one of the length in the oil circulation direction, the number of bent portions, or the cross-sectional shape perpendicular to the oil circulation direction.

[0090] With this configuration, it is possible to provide differences in the pressure losses of the plurality of derived oil passages 90 .

[0091] Next, use Figure 7 and Figure 8 The cooling member 110 according to the second embodiment will be described.

[0092] The cooling member 110 of the second embodiment is mainly different from the cooling member 10 of the first embodiment in the arrangement of the discharge ports 60. Therefore, the arrangement of the discharge ports 60 of the cooling member 110 of the second embodiment will be described in detail below.

[0093] like Figure 7As shown, the respective ejection ports 60 of the cooling member 110 are arranged at positions different from each other in the radial direction.

[0094] Specifically, the first discharge port 61 is disposed on an imaginary circle C1 of radius R1 whose center coincides with the second plate portion 40. The second discharge port 62 is disposed on an imaginary circle C2 of radius R2 whose center coincides with the second plate portion 40. The radius R2 of the imaginary circle C2 is smaller than the radius R1 of the imaginary circle C1.

[0095] In addition, the third ejection port 63 is arranged on an imaginary circle C3 of radius R3 whose center coincides with the second plate portion 40. The radius R3 of the imaginary circle C3 is smaller than the radius R2 of the imaginary circle C2. In addition, the fourth ejection port 64 is arranged on an imaginary circle C4 of radius R4 whose center coincides with the second plate portion 40. The radius R4 of the imaginary circle C4 is smaller than the radius R3 of the imaginary circle C3.

[0096] In this way, the discharge port 60 of the cooling member 110 is arranged so as to be located further inward in the radial direction of the second plate portion 40 as it is located downward.

[0097] Next, a case where the coil 4 is cooled using the above-mentioned cooling member 110 will be described.

[0098] Figure 8 The relative positional relationship between the axial end face of the coil 4 (coil end 4a) and each ejection port 60 of the cooling member 110 opposite to the end face is shown. As described above, the ejection port 60 is arranged so that the lower it is, the more radially inward it is of the second plate portion 40. Therefore, the ejection port 60 is also arranged so that the lower it is relative to the end face of the coil 4, the more radially inward it is of the second plate portion 40.

[0099] For example, the first jet port 61 is arranged in the upper part of the coil 4 so as to be located radially outside the coil 4. Therefore, the oil ejected from the first jet port 61 is provided near the outer periphery of the coil 4, and then flows downward (i.e., the inner periphery) along the end surface of the coil 4 based on gravity. In this way, the oil ejected from the first jet port 61 is provided in a large range from the outer periphery of the end surface of the coil 4 to the inner periphery. Thus, the coil 4 can be effectively cooled.

[0100] In addition, the fourth jet port 64 is arranged at the lower part of the coil 4 so as to be located radially inward of the coil 4. Therefore, the oil ejected from the fourth jet port 64 is provided near the inner periphery of the coil 4, and then flows downward (i.e., the outer periphery) along the end surface of the coil 4 based on gravity. In this way, the oil ejected from the fourth jet port 64 is provided in a large range from near the inner periphery of the end surface of the coil 4 to near the outer periphery. Thus, the coil 4 can be effectively cooled.

[0101] In this way, by adjusting the radial position of each ejection port 60 in consideration of the direction of gravity, oil can be supplied to a larger range of the end surface of the coil 4. That is, by respectively arranging the ejection port 60 opposed to the upper half of the coil 4 to be located near the outer periphery of the coil 4 and the ejection port 60 opposed to the lower half of the coil 4 to be located near the inner periphery of the coil 4, oil can be supplied to a larger range of the end surface of the coil 4.

[0102] As described above, in the cooling member 110 of the present embodiment,

[0103] The plurality of discharge ports 60 are disposed so as to face the axial end surface of the motor 1 (more specifically, the coil 4 of the motor 1 ), and are disposed at positions different from each other in the radial direction of the motor 1 .

[0104] With this configuration, any position of the motor 1 (coil 4) can be cooled. That is, the coil 4 can be cooled arbitrarily by arbitrarily adjusting the radial positions of the plurality of discharge ports 60 according to the purpose (desired cooling position, etc.).

[0105] Next, use Fig. 9 A cooling member 210 according to the third embodiment will be described.

[0106] The cooling member 210 of the third embodiment is different from the cooling member 10 of the first embodiment in that the oil is ejected not toward the axial end surface of the coil 4 but toward the side surface (the side surface on the radial outer side).

[0107] Specifically, the cooling member 210 is formed into a cylindrical shape that surrounds the coil 4 (coil end 4a) from the outside. A spray port 60 is provided on the inner peripheral surface of the cooling member 210. With such a configuration, oil is sprayed toward the inside of the cooling member 210 through the spray port 60. The oil sprayed from the cooling member 210 is provided to the side of the coil 4, so that the coil 4 can be cooled.

[0108] In addition, similar to the cooling member 10 of the first embodiment, the cooling member 210 is also formed with a main oil passage 80 and a derived oil passage 90 for guiding the oil to the ejection port 60. By forming the derived oil passage 90 in a shape that generates a greater pressure loss as it approaches the oil supply port 31, the amount of oil ejected from each ejection port 60 can be equalized.

[0109] As described above, in the cooling member 210 of the present embodiment,

[0110] The plurality of discharge ports 60 are disposed so as to face the radially outer side surface of the motor 1 (more specifically, the coil 4 of the motor 1 ).

[0111] With this configuration, the motor 1 (coil 4 ) can be cooled from the side.

[0112] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said structure, Various changes are possible within the scope of the invention described in a claim.

[0113] For example, in the above-mentioned embodiment, the cooling member 10 is arranged in front of the coil 4 to cool the front coil end 4a, but the cooling member 10 may be arranged behind the coil 4 to cool the rear coil end 4a. In addition, the cooling member 10 may be arranged in front of and behind the coil 4 to cool both the front and rear coil ends 4a.

[0114] In addition, the shapes of the main oil passage 80 and the derived oil passage 90 are not limited to the above-mentioned embodiment, and can be any shape. In addition, in the above-mentioned embodiment, each derived oil passage 90 is formed to have a different length (total length) and the number of bent parts, but it is not limited to this. For example, by forming the cross-sectional shape perpendicular to the oil flow direction to be different, the pressure loss of the circulating oil can also be adjusted.

[0115] In addition, the number and positions of the discharge ports 60 and the derived oil passages 90 are not limited to those in the above-described embodiment, and can be arbitrarily changed.

[0116] In addition, in the above embodiment, the housing 2 of the motor 1 and the cooling member 10 are separately provided, but the present invention is not limited thereto. For example, the cooling member 10 may be formed integrally with the housing 2 of the motor 1. Specifically, an oil path (main oil path 80, derived oil path 90, etc.) and a discharge port (discharge port 60) for guiding oil may also be formed on the housing 2.

[0117] In addition, in the above-mentioned embodiment, the coil 4 is arranged in a state where the axis is oriented in the front-back direction, but the present invention is not limited to this. That is, the arrangement direction of the coil 4 can also be changed arbitrarily. In addition, in the above-mentioned embodiment, the plate surface of the cooling member 10 is arranged along a substantially vertical direction, but the present invention is not limited to this. That is, the cooling member 10 can be arranged in any direction according to the direction of the coil 4, etc.

[0118] In addition, the cooling member 10 (see Figure 1 ) and the cooling member 210 of the third embodiment (refer to Fig. 9 ), oil is supplied from multiple directions to the coil 4. In this case, the cooling member 10 and the cooling member 210 may be formed by one member.

[0119] In addition, in the above embodiment, an example is shown in which the motor 1 (coil 4) is cooled by supplying oil to the coil 4 of the motor 1, but the present invention is not limited to this. That is, the present invention only needs to be able to cool the motor 1, and the destination of supplying oil is not limited to the coil 4. For example, oil may be supplied to components other than the coil 4 constituting the motor 1 for cooling.

[0120] Furthermore, in the above-described embodiment, the motor 1 is used in a driving device for an automobile, but the present invention is not limited thereto and can be used for any purpose.

Claims

1. A cooling component of a motor, which is in the shape of a circular ring plate and has: an oil supply port, which supplies oil; a plurality of spray ports for spraying oil toward the motor along the axial direction of the cooling component; a main oil passage formed in an arc shape along the circumference of the cooling member and connected to the oil supply port; and a plurality of derivative oil passages branched from the main oil passage in a manner corresponding to the plurality of ejection ports, the plurality of derivative oil passages being formed to connect the main oil passage and the ejection ports and having shapes different from each other, The plurality of derived oil passages are formed such that the closer the distance to the oil supply port is, the longer the length of the derived oil passage in the oil flow direction is. The multiple derivative oil circuits respectively include: an upstream oil circuit portion, which extends radially outward from the main oil circuit; and a downstream oil circuit portion, which connects the radially outer end of the upstream oil circuit portion and the corresponding ejection port, and extends in the direction of the main oil circuit as a whole.

2. The motor cooling component according to claim 1, wherein: The plurality of derivative oil passages are different in at least one of the number of bent portions and the cross-sectional shape perpendicular to the oil flow direction.

3. The cooling component of the motor according to claim 1 or 2, wherein: The plurality of discharge ports are arranged to face an axial end surface of the motor and are arranged at positions different from each other in a radial direction of the motor.

4. The cooling component of the motor according to claim 1 or 2, wherein: The plurality of discharge ports are arranged to face a radially outer side surface of the motor.

5. The cooling component of the motor according to claim 3, wherein: The plurality of discharge ports are arranged to face an axial end surface of the motor and are arranged at positions different from each other in a radial direction of the motor.

6. The cooling component of the motor according to claim 3, wherein: The plurality of discharge ports are arranged to face a radially outer side surface of the motor.

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