Oil ring assembly and motor

Abstract

The oil ring assembly comprises a ring body, a first sealing ring and a second sealing ring, and a liquid dropping hole is formed in the ring body in a penetrating mode in the direction forming an included angle with the thickness direction of the ring body; the first sealing ring is arranged on the peripheral side of the ring body; the second sealing ring is axially exposed out of one end of the ring body, and the liquid dropping hole is obliquely formed in the direction away from the second sealing ring. According to the scheme of the utility model, oblique oil dripping of the oil ring assembly on the stator winding is realized, so that large-range oil dripping cooling of the stator winding is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an oil ring component and a motor. Background Art

[0002] The operation process of the motor is actually a process of mutual conversion between electrical energy and mechanical energy. In this process, some energy loss will inevitably occur. Most of this energy loss will be converted into heat, which will cause the operating temperature of the stator, rotor and other components to increase. Therefore, the stator, rotor and other components need to be cooled to ensure the normal operation of the motor.

[0003] In the related art, the motor includes a housing, a stator core, a stator winding and an oil ring. The stator winding is axially protruded at the end of the stator core, and the oil ring is disposed around the stator winding. The oil ring is provided with an oil dripping hole in the thickness direction. By feeding oil into the oil dripping hole, the coolant dripping from the oil dripping hole falls on the stator winding, thereby cooling the stator winding. However, the dripping hole of the oil ring is a straight oil hole, so it can only drip straightly, but not obliquely, which makes it difficult to meet the requirements of large-scale dripping cooling of the stator winding. Utility Model Content

[0004] The utility model aims to provide an oil ring assembly, aiming to realize the oblique oil dripping of the oil ring assembly to the stator winding, so as to realize the large-scale oil drip cooling of the stator winding.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes an oil ring assembly, which includes a ring body, a first sealing ring and a second sealing ring, and the ring body is penetrated by a drip hole in a direction that is at an angle to its thickness direction; the first sealing ring is arranged on the outer peripheral side of the ring body; the second sealing ring is axially exposed at one end of the ring body, and the drip hole is inclined in a direction away from the second sealing ring.

[0006] Optionally, an angle between a depth direction of the drip hole and a thickness direction of the ring body ranges from 60° to 70°.

[0007] Optionally, the diameter of the drip hole is gradually reduced along the direction from the outer surface to the inner surface of the ring body.

[0008] Optionally, there are a plurality of the drip holes, and the plurality of the drip holes are spaced apart along the circumference of the ring body.

[0009] Optionally, a plurality of the drip holes are arranged at intervals along the axial direction of the ring body.

[0010] Optionally, two circumferentially adjacent drip holes are staggered along the axial direction of the ring body.

[0011] Optionally, a first mounting groove is provided on the circumference of the ring body, and the first sealing ring is partially embedded in the first mounting groove.

[0012] Optionally, a second mounting groove is axially recessed at one end of the ring body, and the second sealing ring is partially embedded in the second mounting groove.

[0013] The utility model also proposes a motor, the motor comprising a housing, a stator and an oil ring assembly as described above, the housing being provided with a storage cavity, the cavity wall of the storage cavity being penetrated by a liquid inlet hole, the liquid inlet hole being used to introduce a coolant; the stator comprising a stator core and a stator winding, the stator core being provided in the storage cavity, a cooling channel being provided on the outer surface of the stator core, the liquid inlet of the cooling channel being connected to the liquid inlet hole, the stator winding being axially penetrated in the stator core and at least partially exposed at the end of the stator core; the ring The body ring is arranged on the stator winding, the first sealing ring is arranged on the outer peripheral side of the ring body and radially abuts against the cavity wall of the storage cavity, the second sealing ring is axially exposed at one end of the ring body and axially abuts against the end face of the stator core, the ring body, the first sealing ring, the second sealing ring, the casing and the stator core form a liquid storage chamber, the liquid inlet of the liquid storage chamber is connected with the liquid outlet of the cooling channel, the liquid inlet of the drip hole is connected with the liquid outlet of the liquid storage chamber, and the liquid outlet of the drip hole is arranged toward the stator winding.

[0014] Optionally, the stator winding is axially exposed at both ends of the stator core, the number of the oil ring assemblies is two, the two oil ring assemblies are arranged at intervals along the axial direction of the stator core, and the ring body, the first sealing ring, the second sealing ring, the casing and the stator core form a liquid storage chamber.

[0015] Compared with the existing motor, the oil ring installed in the storage cavity is a straight oil hole, so it can only drip straightly, but not obliquely, which makes it difficult to meet the requirements of large-scale drip oil cooling of the stator winding. In the technical solution of the utility model, the first sealing ring is used to achieve the circumferential sealing of the ring body, and the second sealing ring is used to achieve the axial sealing of the ring body, so that the oil ring assembly can be enclosed with the housing and the stator core to form a liquid storage chamber. By filling the liquid storage chamber with oil, the coolant in the liquid storage chamber drips out through the drip hole of the oil ring assembly, and the oblique drip oil of the stator winding is achieved, which is conducive to large-scale drip oil cooling of the stator winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a cross-sectional schematic diagram of the motor of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the stator core;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the oil ring assembly;

[0021] Figure 5 for Figure 1 A cross-sectional diagram of the oil ring assembly;

[0022] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0023] Description of Figure Numbers:

[0024] Label name Label name 10 Motor 313 Axial tank 1 chassis 33 Stator winding 11 Storage cavity 5 Oil ring assembly 13 Liquid storage chamber 51 Ring 15 Liquid inlet hole 511 Drip hole 17 Liquid inlet pipe 513 First installation slot 3 stator 515 Second mounting slot 31 Stator core 53 First sealing ring 311 Circumferential liquid groove 55 Second sealing ring 3111 Main tank 71 Rotor 3113 Secondary tank 73 Motor shaft

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] The operation process of the motor is actually a process of mutual conversion between electrical energy and mechanical energy. In this process, some energy loss will inevitably occur. Most of this energy loss will be converted into heat, which will cause the operating temperature of the stator, rotor and other components to increase. Therefore, the stator, rotor and other components need to be cooled to ensure the normal operation of the motor.

[0031] In the related art, the motor includes a housing, a stator core, a stator winding and an oil ring. The stator winding is axially protruded at the end of the stator core, and the oil ring is disposed around the stator winding. The oil ring is provided with an oil dripping hole in the thickness direction. By feeding oil into the oil dripping hole, the coolant dripping from the oil dripping hole falls on the stator winding, thereby cooling the stator winding. However, the dripping hole of the oil ring is a straight oil hole, so it can only drip straightly, but not obliquely, which makes it difficult to meet the requirements of large-scale dripping cooling of the stator winding.

[0032] In order to solve the above problems, the utility model proposes a motor 10, which aims to realize the oblique oil dripping of the oil ring assembly 5 on the stator winding 33, so as to realize a large-scale oil drip cooling of the stator winding 33, while reducing the volume of the oil ring assembly 5.

[0033] Reference Figures 1 to 6In one embodiment of the utility model, the oil ring assembly 5 includes a ring body 51, a first sealing ring 53 and a second sealing ring 55. The ring body 51 is penetrated by a drip hole 511 in a direction that is angled with its thickness direction; the first sealing ring 53 is arranged on the outer peripheral side of the ring body 51; the second sealing ring 55 is axially exposed at one end of the ring body 51, and the drip hole 511 is inclined in a direction away from the second sealing ring 55.

[0034] The first sealing ring 53 can be an O-ring to seal the outer peripheral side of the ring body 51, and the second sealing ring 55 can be an H-ring to seal the axial direction of the ring body 51. If the coolant is oil, the ring body 51 is made of a material with good oil resistance, such as PPS material, and the first sealing ring 53 and the second sealing ring 55 are made of a material with good oil resistance, such as FKM material.

[0035] Compared with the existing motor, the oil ring of the installation storage cavity is a straight oil hole, so it can only drip straightly, but not obliquely, which makes it difficult to meet the requirements of large-scale drip oil cooling of the stator winding 33. In the technical solution of the utility model, the first sealing ring 53 is used to achieve the circumferential sealing of the ring body 51, and the second sealing ring 55 is used to achieve the axial sealing of the ring body 51, so that the oil ring assembly 5 can be enclosed with the housing 1 and the stator core 31 to form a liquid storage chamber 13. By filling the liquid storage chamber 13 with oil, the coolant in the liquid storage chamber 13 drips out through the drip hole 511 of the oil ring assembly 5, and oblique oil dripping of the stator winding 33 is achieved, which is conducive to large-scale drip oil cooling of the stator winding 33.

[0036] In addition, compared with the straight oil dripping at a certain axial position of the oil ring assembly 5, the oblique oil dripping method of the utility model can realize oil dripping along other axial positions of the oil ring assembly 5 by setting the inclination angle of the dripping hole 511 relative to the thickness direction, thereby reducing the axial size of the oil ring assembly 5, which is beneficial to reducing the volume of the oil ring assembly 5.

[0037] Reference Figures 4 to 6 In one embodiment of the present invention, the angle between the depth direction of the drip hole 511 and the thickness direction of the ring body 51 is in the range of 60° to 70°.

[0038] In this embodiment, on the basis of ensuring that the drip hole 511 drips oil normally, the angle range between the hole depth direction of the drip hole 511 and the thickness direction of the ring body 51 is set to 60° to 70°, which is conducive to achieving the drip hole 511 of the oil ring assembly 5 dripping oil to other axial positions as much as possible, so as to further reduce the axial size and volume of the oil ring assembly 5, and accurately drip the coolant onto the stator winding 33 for cooling.

[0039] Optionally, the angle between the depth direction of the drip hole 511 and the thickness direction of the ring body 51 is set to 65°.

[0040] Reference Figures 4 to 6 In one embodiment of the present invention, the diameter of the drip hole 511 is gradually reduced along the direction from the outer surface to the inner surface of the ring body 51.

[0041] In this embodiment, the aperture of the drip hole 511 is set to be tapered, which is conducive to the hydraulic circulation of the coolant from the inner surface to the outer surface of the ring body 51, ensuring that the coolant drips normally onto the stator winding 33 for cooling.

[0042] Reference Figures 4 to 6 In one embodiment of the present invention, there are multiple drip holes 511 , and the multiple drip holes 511 are arranged at intervals along the circumference of the ring body 51 .

[0043] In this embodiment, a plurality of drip holes 511 are arranged at intervals in the circumferential direction of the ring body 51, so that oil dripping can be performed at multiple locations in the circumferential direction of the ring body 51, thereby improving the oil dripping rate and oil dripping range of the oil ring assembly 5, thereby improving the cooling effect of the oil ring assembly 5 on the stator winding 33.

[0044] Reference Figures 4 to 6 In one embodiment of the present invention, a plurality of the drip holes 511 are arranged at intervals along the axial direction of the ring body 51 .

[0045] In this embodiment, a plurality of drip holes 511 are arranged at intervals in the axial direction of the ring body 51, so that oil can be dripped at multiple locations in the axial direction of the ring body 51, thereby improving the oil dripping rate and oil dripping range of the oil ring assembly 5, and further improving the cooling effect of the oil ring assembly 5 on the stator winding 33.

[0046] Reference Figures 4 to 6 In one embodiment of the present invention, two circumferentially adjacent drip holes 511 are staggered along the axial direction of the ring body 51 .

[0047] In this embodiment, two circumferentially adjacent drip holes 511 are staggered along the axial direction of the ring body 51. This is beneficial to further improve the axial oil dripping range of the oil ring assembly 5 without increasing the number of axial drip holes 511, so as to enhance the cooling effect of the oil ring assembly 5 on the stator winding 33.

[0048] Reference Figures 4 to 6 In one embodiment of the present invention, a first mounting groove 513 is circumferentially provided on the ring body 51 , and a portion of the first sealing ring 53 is embedded in the first mounting groove 513 .

[0049] In this embodiment, the first sealing ring 53 is installed in the first installation groove 513 of the ring body 51 by embedding. Compared with the method in which the first sealing ring is directly sleeved on the outer circumference of the ring body, this solution is conducive to reducing the overall volume of the oil ring assembly 5.

[0050] Reference Figures 4 to 6 In one embodiment of the present utility model, a second mounting groove 515 is axially recessed at one end of the ring body 51 , and the second sealing ring 55 is partially embedded in the second mounting groove 515 .

[0051] In this embodiment, the second sealing ring 55 is installed in the second installation groove 515 of the ring body 51 by embedding. Compared with the method in which the second sealing ring is directly protruded from one axial end of the ring body, this solution is conducive to reducing the overall volume of the oil ring assembly 5.

[0052] Reference Figures 1 to 3 The utility model also proposes a motor 10, which includes a housing 1, a stator 3 and the oil ring assembly 5 as described above, wherein the housing 1 is provided with a storage chamber 11, and a liquid inlet hole 15 is provided through the wall of the storage chamber 11, and the liquid inlet hole 15 is used to pass the coolant; the stator 3 includes a stator core 31 and a stator winding 33, the stator core 31 is provided in the storage chamber 11, and a cooling channel is provided on the outer surface of the stator core 31, and the liquid inlet of the cooling channel is connected with the liquid inlet hole 15, and the stator winding 33 is axially penetrated in the stator core 31 and at least partially exposed at the end of the stator core 31; the ring body 51 The ring is arranged on the stator winding 33, the first sealing ring 53 is arranged on the outer peripheral side of the ring body 51, and radially abuts against the cavity wall of the storage cavity 11, the second sealing ring 55 is axially exposed at one end of the ring body 51, and axially abuts against the end face of the stator core 31, the ring body 51, the first sealing ring 53, the second sealing ring 55, the casing 1 and the stator core 31 enclose a liquid storage chamber 13, the liquid inlet of the liquid storage chamber 13 is connected with the liquid outlet of the cooling channel, the liquid inlet of the drip hole 511 is connected with the liquid outlet of the liquid storage chamber 13, and the liquid outlet of the drip hole 511 is arranged toward the stator winding 33.

[0053] The specific structure of the oil ring assembly 5 refers to the above embodiments. Since the oil ring assembly 5 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0054] Among them, the coolant conducts heat on the surface of the component through liquid circulation to achieve the purpose of cooling the component. The present application does not limit the specific type of coolant. For example, the coolant is selected as coolant, which has good specific heat capacity and high boiling point, which is conducive to the recycling of the coolant.

[0055] In order to facilitate the introduction of coolant into the liquid inlet hole 15 of the housing 1, a liquid inlet pipe 17 is inserted at the opening of the liquid inlet hole 15, and the coolant can be initially introduced into the storage cavity 11 by the liquid inlet pipe 17. In addition, the motor 10 also includes a rotor 71, which drives the motor shaft 73 to rotate.

[0056] In the technical solution of the utility model, the coolant is introduced into the storage cavity 11 of the casing 1 through the liquid inlet hole 15, and then flows into the cooling channel on the surface of the stator core 31. Since the oil ring assembly 5, the casing 1 and the stator core 31 form a liquid storage chamber 13, the coolant in the cooling channel further flows into the liquid storage chamber 13, and the coolant in the liquid storage chamber 13 is finally sprayed onto the stator winding 33 through the drip hole 511 of the oil ring assembly 5.

[0057] Compared with the existing motors, the oil holes designed inside the stator core increase the outer diameter of the stator core, which increases the overall volume of the motor and increases the production cost of the motor. The motor 10 of the utility model is provided with a cooling channel on the outer surface of the stator core 31. By inputting coolant into the cooling channel, the stator core 31 can be cooled. In addition, the liquid storage chamber 13 is connected to the cooling channel, and the coolant is sprayed onto the stator winding 33 through the drip hole 511 of the oil ring assembly 5, so the stator winding 33 can also be cooled. Therefore, the motor 10 of the utility model can cool the stator core 31 and the stator winding 33 at the same time, and the overall volume is small, which reduces the production cost of the motor 10.

[0058] Reference Figure 1 As shown in FIG. 3 , in one embodiment of the utility model, the stator winding 33 is axially exposed at both ends of the stator core 31, the oil ring assemblies 5 are provided with two, and the two oil ring assemblies 5 are arranged axially at intervals along the stator core 31, and the ring body 51, the first sealing ring 53, the second sealing ring 55, the housing 1 and the stator core 31 enclose a liquid storage chamber 13.

[0059] In this embodiment, two oil ring assemblies 5 are respectively provided at the axial ends of the stator core 31. The two oil ring assemblies 5 are respectively enclosed with the casing 1 and the stator core 31 to form two liquid storage chambers 13. The two liquid storage chambers 13 respectively drip oil to the two ends of the stator winding 33 through the drip holes 511 to achieve cooling of the two ends of the stator winding 33, which is beneficial to improving the cooling effect of the stator winding 33.

[0060] Reference Figure 2 and Figure 3 In one embodiment of the utility model, the cooling channel includes a circumferential liquid groove 311 and an axial liquid groove 313. The circumferential liquid groove 311 is extended circumferentially along the outer surface of the stator core 31. The circumferential liquid groove 311 is connected to the liquid inlet hole 15. The groove walls on both sides of the circumferential liquid groove 311 are respectively open to form the axial liquid groove 313. The axial liquid groove 313 is connected to the liquid storage chamber 13.

[0061] In this embodiment, the external coolant flows into the circumferential liquid groove 311 on the outer surface of the stator core 31 through the liquid inlet hole 15. The axial liquid grooves 313 that penetrate on both sides of the circumferential liquid groove 311 can play a role in axially diverting the coolant, thereby achieving axial cooling of the outer surface of the stator core 31. The axial liquid groove 313 is penetrated on both sides, which can further divert the coolant, which is beneficial to increase the cooling area of ​​the coolant. Therefore, this solution simultaneously achieves circumferential cooling and axial cooling of the outer surface of the stator core 31, which is beneficial to improving the cooling effect of the stator core 31.

[0062] Reference Figure 2 and Figure 3 In one embodiment of the utility model, the circumferential liquid groove 311 includes a main liquid groove 3111 and a secondary liquid groove 3113. The main liquid groove 3111 is connected to the liquid inlet hole 15. The secondary liquid groove 3113 and the main liquid groove 3111 are arranged at intervals along the axial direction of the stator core 31 and are connected through the axial liquid groove 313. The groove diameter of the secondary liquid groove 3113 is smaller than that of the main liquid groove 3111.

[0063] In this embodiment, the liquid inlet 15 is located in the middle of the housing 1 facing the stator core 31, and the main liquid tank 3111 is located at the center of the stator core 31 to receive the coolant introduced by the liquid inlet 15. After the coolant passes through the main liquid tank 3111, it is diverted to the secondary liquid tanks 3113 on the left and right sides through the connection of the axial liquid tank 313. The groove diameter of the secondary liquid tank 3113 is set smaller than that of the main liquid tank 3111, which is conducive to ensuring the normal circulation of the coolant through the effect of hydraulic throttling. In addition, the main liquid tank 3111 and the secondary liquid tank 3113 are respectively provided with axial spacing, which can further cool the stator core 31 in each circumferential direction in the axial direction to enhance the cooling effect on the stator core 31.

[0064] Reference Figure 2 and Figure 3 In one embodiment of the present invention, there are multiple secondary liquid tanks 3113 , and the multiple secondary liquid tanks 3113 are distributed on both sides of the main liquid tank 3111 and are arranged at intervals along the axial direction of the stator core 31 .

[0065] In this embodiment, a plurality of secondary liquid grooves 3113 are distributed on both sides of the main liquid groove 3111 . By providing a plurality of secondary liquid grooves 3113 , circumferential cooling of various positions in the axial direction of the stator core 31 is achieved to improve the cooling effect of the stator core 31 .

[0066] Reference Figure 2 and Figure 3 In one embodiment of the present invention, the diameter of the secondary liquid groove 3113 decreases gradually from the direction close to the main liquid groove 3111 to the direction away from the main liquid groove 3111.

[0067] Reference Figure 2 and Figure 3 In one embodiment of the present invention, the diameter of the secondary liquid groove 3113 decreases gradually from the direction close to the main liquid groove 3111 to the direction away from the main liquid groove 3111.

[0068] In this embodiment, the groove diameter of each secondary liquid groove 3113 decreases successively in the direction from close to the main liquid groove 3111 to away from the main liquid groove 3111, which can play a role of step-by-step throttling and conduction, which is beneficial to ensure the normal circulation of the coolant and is distributed on each stage of the secondary liquid groove 3113, thereby increasing the heat dissipation area and improving the cooling effect on the stator core 31.

[0069] Reference Figure 2 and Figure 3 In one embodiment of the present invention, there are multiple axial liquid grooves 313 , and the multiple axial liquid grooves 313 are arranged at intervals along the circumferential direction of the stator core 31 .

[0070] In this embodiment, along the circumferential direction of the stator core 31, a plurality of axial liquid grooves 313 are distributed and penetrated on the groove wall of the circumferential liquid groove 311, so that the coolant in the circumferential liquid groove 311 can be diverted out from the axial sides of the stator core 31 more quickly, thereby promoting the axial interconnection of the circumferential liquid grooves 311 and increasing the axial cooling area of ​​the stator core 31, so as to improve the cooling effect on the stator core 31.

[0071] Reference Figure 2 and Figure 3 In one embodiment of the present invention, the two axially adjacent axial liquid grooves 313 are arranged along the same axial direction.

[0072] In this embodiment, two axially adjacent axial liquid grooves 313 are arranged along the same axial direction, so that the axially adjacent axial liquid grooves 313 can be directly axially connected, reducing the cooling path of the coolant and increasing the circulation rate of the coolant, thereby improving the cooling effect on the stator core 31.

[0073] Reference Figure 2 and Figure 3 In one embodiment of the present invention, the circumferential liquid groove 311 is in a spiral shape.

[0074] In this embodiment, the shape of the circumferential liquid groove 311 is configured to be spiral, so that the coolant has better fluidity and increases the cooling area of ​​the outer surface of the stator core 31 , which is beneficial to improving the cooling effect on the stator core 31 .

[0075] Optionally, the main liquid tank 3111 and the secondary liquid tank 3113 are both configured in a spiral shape and are spaced apart from each other, which is beneficial for further cooling the stator core 31 .

[0076] In summary, the oil ring assembly 5 proposed in the embodiment of the utility model is suitable for the technical solution of oil circuit cooling of the motor 10. The oil ring assembly 5 includes a ring body 51 and two sealing elements, an O-ring and an H-ring. The ring body 51 is designed with an O-ring groove and an H-ring groove to support and fix the O-ring and the H-ring. The ring body 51 is circumferentially designed with 15 oblique drip holes 511 with a draft feature diameter of 1.2 mm and an inclination of 65° to achieve oblique dripping of the stator winding 33, so that the oil is accurately sprayed to the appropriate position of the stator winding 33, reducing the volume of the oil ring assembly 5, reducing the material used, and greatly reducing the product cost. The utility model solution also proposes similar solutions with different numbers, different inclinations and different diameters of drip holes 511 to meet the heat dissipation and cooling requirements of the stator winding 33.

[0077] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An oil ring assembly, characterized in that: The oil ring assembly comprises: A ring body, wherein the ring body is provided with a drip hole in a direction forming an angle with the thickness direction of the ring body; A first sealing ring, the first sealing ring being arranged on the outer peripheral side of the ring body; and The second sealing ring is axially exposed at one end of the ring body, and the drip hole is inclined in a direction away from the second sealing ring.

2. The oil ring assembly according to claim 1, characterized in that: The angle between the depth direction of the drip hole and the thickness direction of the ring body ranges from 60° to 70°.

3. The oil ring assembly according to claim 2, characterized in that: Along the direction from the outer surface to the inner surface of the ring body, the aperture of the drip hole is gradually reduced.

4. The oil ring assembly according to any one of claims 1 to 3, characterized in that: There are a plurality of the drip holes, and the plurality of the drip holes are arranged at intervals along the circumference of the ring body.

5. The oil ring assembly according to claim 4, characterized in that: The plurality of drip holes are arranged at intervals along the axial direction of the ring body.

6. The oil ring assembly according to claim 4, characterized in that: Two circumferentially adjacent drop holes are staggered along the axial direction of the ring body.

7. The oil ring assembly according to any one of claims 1 to 3, characterized in that: The ring body is provided with a first installation groove in the circumferential direction, and the first sealing ring is partially embedded in the first installation groove.

8. The oil ring assembly according to any one of claims 1 to 3, characterized in that: A second mounting groove is axially recessed at one end of the ring body, and the second sealing ring is partially embedded in the second mounting groove.

9. A motor, characterized in that: The motor comprises: A housing, wherein the housing is provided with a storage cavity, a cavity wall of the storage cavity is penetrated by a liquid inlet hole, and the liquid inlet hole is used to pass a coolant; A stator, the stator comprising a stator core and a stator winding, the stator core being arranged in the receiving cavity, a cooling channel being arranged on the outer surface of the stator core, a liquid inlet of the cooling channel being connected to the liquid inlet hole, the stator winding being axially arranged in the stator core and at least partially exposed at an end of the stator core; and According to the oil ring assembly as described in any one of claims 1 to 8, the ring body is arranged on the stator winding, the first sealing ring is arranged on the outer peripheral side of the ring body and radially abuts against the cavity wall of the storage cavity, the second sealing ring is axially exposed at one end of the ring body and axially abuts against the end face of the stator core, the ring body, the first sealing ring, the second sealing ring, the housing and the stator core form a liquid storage chamber, the liquid inlet of the liquid storage chamber is connected to the liquid outlet of the cooling channel, the liquid inlet of the drip hole is connected to the liquid outlet of the liquid storage chamber, and the liquid outlet of the drip hole is arranged toward the stator winding.

10. The motor according to claim 9, characterized in that The stator winding is axially exposed at both ends of the stator core. There are two oil ring assemblies, which are spaced apart along the axial direction of the stator core. The ring body, the first sealing ring, the second sealing ring, the housing and the stator core form a liquid storage chamber.

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