Oil spray ring and electric motor

Abstract

Provided in the present invention are an oil spray ring and an electric motor. The oil spray ring comprises: a ring body, wherein the ring body is provided with a plurality of oil spray hole groups, which are arranged in the circumferential direction of the ring body, and at least one end of the ring body is provided with at least one rib. Each oil spray hole group comprises at least two oil spray holes, said oil spray holes diagonally penetrating the ring body, and oil spray holes in the same group facing the same direction. The present invention can provide a reliable seal with no sealing member or only a few sealing members, and also simplifies the structure and reduces the cost, and can reduce the risk of oil ring cracking due to pressure; during injection molding using a mold, the number of required slider pulling holes can be reduced, so that the mold design is optimized, reducing the cost whilst improving the product quality; the uniformity of oil spray is improved, ensuring the uniformity of oil spray by the oil ring mounted at any angle; and, when faced with different axial tolerances, the oil ring can fit tightly against a stator core, thus providing a reliable seal for this side.

Description

Oil injection ring and motor Technical Field

[0001] The invention belongs to the technical field of motors, and particularly relates to an oil injection ring and a motor. Background Art

[0002] The oil spray ring, also known as the oil ring or oil distribution ring, is a component used in oil-cooled motors to form the stator cooling oil circuit and spray coolant on the stator end. Existing oil spray rings consist of an oil ring body, two sealing rings, and oil spray holes in the body. One end of the oil spray ring contacts the stator core, with an end seal sealing this mating surface. The other side of the oil spray ring contacts the housing radially or on the end surface, with another radial seal or end seal sealing this mating surface. These two large-diameter seals create a complex design and high cost. Furthermore, the oil ring body is surrounded by a circle of oil holes with a variety of orientations. Consequently, a large number of slide holes are required during injection molding, resulting in complex mold design and high costs.

[0003] Summary of the Invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an oil injection ring and a motor to improve the problems of the existing oil injection ring having complex design and high cost, as well as the large number of slider holes required during mold injection, resulting in complex mold design and high cost.

[0005] To achieve the above and other related purposes, the present invention provides an oil injection ring, comprising:

[0006] a ring body, wherein a plurality of groups of oil injection holes are provided on the ring body, the plurality of groups of oil injection holes are arranged along the circumference of the ring body, and at least one end of the ring body is provided with at least one rib;

[0007] Each group of the oil injection holes includes at least two oil injection holes, and the oil injection holes obliquely penetrate the ring body, and the directions of the oil injection holes in the same group are the same.

[0008] In one embodiment of the present invention, the ring body is provided with at least one circle of the oil injection holes, and each circle of the oil injection holes includes a plurality of groups of the oil injection holes.

[0009] In one embodiment of the present invention, the arc length between two adjacent fuel injection holes in two adjacent groups is greater than the arc length between two adjacent fuel injection holes in the same group.

[0010] In one embodiment of the present invention, the plurality of oil injection holes in the same group are symmetrically arranged on the ring body about a midpoint of an arc between two of the oil injection holes that are farthest apart from each other.

[0011] In one embodiment of the present invention, the arc distance between two adjacent oil injection holes in the same group gradually decreases along the edge toward the middle.

[0012] In one embodiment of the present invention, the shape of the convex rib includes square, trapezoidal, circular, triangular or wavy.

[0013] In one embodiment of the present invention, a plurality of fixing lugs are provided at one end of the ring body, and the plurality of fixing lugs are arranged along the circumference of the ring body.

[0014] The present invention further provides a motor, comprising:

[0015] a housing, one end of which is provided with a stator oil inlet;

[0016] a stator mounted in the housing;

[0017] A first oil spray ring and a second oil spray ring, which are respectively mounted at both ends of the stator, and the first oil spray ring is located at an end close to the stator oil inlet;

[0018] Wherein, the first oil spray ring and the second oil spray ring are the oil spray rings as described in any one of the above embodiments.

[0019] In one embodiment of the present invention, the axes of the oil injection holes on the first oil injection ring and the second oil injection ring are inclined in a radial direction from outside to inside toward a direction away from the stator core.

[0020] In one embodiment of the present invention, the ring body width of the second oil injection ring is greater than the width of the installation position, and the second oil injection ring is fixed by extrusion between the housing and the stator core.

[0021] In one embodiment of the present invention, at least one rib is provided at both ends of the ring body of the second oil injection ring.

[0022] In one embodiment of the present invention, the ring body of the first oil injection ring includes a first section and a second section, an end surface of the first section contacts the stator core, and an axial surface of the second section partially contacts the housing.

[0023] In one embodiment of the present invention, at least one rib is provided on the end surface of the first section that contacts the stator core, and a plurality of fixing lugs are provided along the circumference of the end of the second section away from the first section, and the first oil injection ring is fixedly connected to the housing through the fixing lugs.

[0024] In one embodiment of the present invention, a rubber pad is further included, and at least one rubber pad is provided between the fixing lug and the housing.

[0025] In one embodiment of the present invention, at least one circle of ribs is provided on the portion of the second section that contacts the shell, and an interference fit is formed between the second section and the shell.

[0026] In one embodiment of the present invention, two circles of ribs are provided on the portion of the second section that contacts the shell. The ribs located close to the stator core are in an overfitting relationship with the shell, while the ribs located away from the stator core are in an interference fit with the shell.

[0027] In one embodiment of the present invention, a sealing ring is provided on the end surface of the first section in contact with the stator core and / or the contact point of the second section with the housing.

[0028] The present invention proposes an oil injection ring and a motor, which are designed with ribs on the end face of the oil injection ring. The ribs cooperate with the housing and the stator core to achieve sealing, so as to achieve reliable sealing without or with fewer seals, while simplifying the structure and reducing costs. At the same time, the oil injection ring can be better deformed during the interference compression process, thereby reducing the possibility of fracturing of the oil injection ring.

[0029] The present invention proposes an oil injection ring and a motor, wherein the oil injection holes on the ring body of the oil injection ring adopt a symmetrical design, so that the number of slide hole extraction holes required during mold injection can be reduced, thereby optimizing the mold design, improving product quality and reducing costs.

[0030] The present invention provides an oil injection ring and a motor, which improves oil injection uniformity by rationally designing the arc length distance between each oil injection hole on the ring body of the oil injection ring, thereby ensuring oil injection uniformity when the oil injection ring is installed at any angle.

[0031] The present invention proposes an oil injection ring and a motor. By designing a fixing lug and reasonably placing a number of rubber pads between the fixing lug and the housing, the left and right positions of the oil injection ring can be adjusted, so that the oil injection ring can be well pressed and fitted with the stator core under different axial tolerances, thereby achieving reliable sealing on this side. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] FIG1 is a schematic structural diagram of an oil injection ring in one embodiment of the present invention.

[0034] FIG2 is a schematic diagram of the partial cross-sectional structure of the fuel injection ring in FIG1 .

[0035] FIG3 is a schematic structural diagram of an oil injection ring in another embodiment of the present invention.

[0036] FIG4 is a schematic diagram of the arrangement structure of the oil injection holes in the oil injection ring in one embodiment of the present invention.

[0037] FIG5 is a partial schematic diagram of the oil injection ring in FIG4 .

[0038] FIG6 is a schematic cross-sectional view of a motor according to an embodiment of the present invention.

[0039] FIG7 is a schematic diagram of a partial cross-sectional structure of the oil injection ring in FIG3 .

[0040] FIG8 is a schematic diagram of the sealing of the oil injection ring of the motor in one embodiment of the present invention.

[0041] FIG9 is a sealing diagram of an oil injection ring of a motor in another embodiment of the present invention.

[0042] FIG10 is a sealing diagram of an oil injection ring of a motor in another embodiment of the present invention.

[0043] Description of labels:

[0044] 10. Oil injection ring; 11. Ring body; 12. Oil injection hole; 111. Raised rib; 112. Fixing lug; 100. Motor; 20. Housing; 30. Stator; 41. First oil injection ring; 42. Second oil injection ring; 201. Stator oil inlet; 31. Stator core; 32. Stator winding; 202. Oil cavity; 311. Stator core oil channel; 113. Rubber pad; 411. First section; 412. Second section; 114. Sealing ring. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0047] Please refer to Figures 1 to 10. The present invention proposes an oil spray ring and a motor to improve the problems of the existing oil spray ring having a complex design and high cost, and a large number of slide hole extraction holes required during mold injection, which results in a complex mold design and high cost. Specifically, the oil spray ring 10 includes a ring body 11 and a plurality of oil spray hole groups arranged on the ring body 11, and the plurality of oil spray hole groups are arranged along the circumference of the ring body 11, wherein each group of the oil spray hole groups includes at least two oil spray holes 12, and the oil spray holes 12 obliquely penetrate the ring body, and the directions of the oil spray holes 12 in the same group are the same, and the oil spray holes 12 are arranged at a certain angle to the radial direction of the ring body 11, so that the sprayed oil can better flow to both sides after contacting the winding, thereby increasing the cooling area of ​​the oil and making the cooling more balanced.

[0048] Please refer to FIG. 1 to FIG. 5 , for example, a case where j groups of oil injection holes are provided on the ring body 11 and each group of oil injection holes includes n oil injection holes 12 is used as an example for description:

[0049] The oil injection hole groups of group j are evenly arranged along the axial direction of the ring body 11, wherein the oil injection holes 12 of each oil injection hole group are arranged in a clockwise direction with the oil injection holes 1 j , 2 j ,…,n j Indicates that the plurality of injection holes 12 in the same group are symmetrically arranged on the ring body 11 about the midpoint of the arc between the two injection holes 12 that are farthest from each other. That is, when n is an odd number, the plurality of injection holes 12 in the same group are symmetrically arranged on the ring body 11 about the middle injection hole 12 in the plurality of injection holes 12. When n is an even number, the plurality of injection holes 12 in the same group are symmetrically arranged on the ring body 11 about the midpoint of the arc between the two injection holes 12 in the middle. For example, when n is 3, the injection hole 1 j and fuel injection hole 3 j Symmetrically arranged at the injection hole 2 j On both sides, take n as 4 as an example, the injection hole 1 j 、Injection hole 2 j 、Injection hole 3 j and fuel injection hole 4 j Symmetrically arranged at the injection hole 2 j and fuel injection hole 3 j On both sides of the midpoint of the arc between the two sides, the oil injection holes on the ring body of the oil injection ring are designed symmetrically, so that when the mold is injected, the number of slide holes required can be reduced, thereby optimizing the mold design, improving product quality and reducing costs.

[0050] Referring to Figures 1 to 5 , in this embodiment, the arc length between two adjacent fuel injection holes 12 in two adjacent groups is greater than the arc length between two adjacent fuel injection holes 12 within the same group. For example, fuel injection holes 11, 21, ..., n1 and fuel injection holes 12, 22, ..., n2 constitute two adjacent fuel injection hole groups, wherein fuel injection hole n1 and fuel injection hole 12 constitute two adjacent fuel injection holes 12 in the two adjacent groups. That is, the arc length between fuel injection hole n1 and fuel injection hole 12 is greater than the arc length between fuel injection holes 11 and fuel injection hole 21, and the arc length between fuel injection hole 12 and fuel injection hole 22. For example, taking n as 3, the length of arc C between injection hole 31 and injection hole 12 is greater than the length of arc D between injection holes 21 and injection hole 31, and the length of arc E between injection holes 12 and injection holes 22. By rationally designing the arc length distance between each injection hole 12 on the ring body 11 of the injection ring 10, the uniformity of injection is improved, ensuring the uniformity of injection when the injection ring 10 is installed at any angle.

[0051] Please refer to Figures 1 to 5. In this embodiment, the arc distance between two adjacent oil injection holes 12 in the same group gradually decreases along the edge toward the middle. For example, when n is 5, the oil injection hole 1 j 、Injection hole 2 j The arc distance between the nozzle and the nozzle 5 j , fuel injection hole 4 j The arc distances between them are respectively smaller than the injection holes 2 j 、Injection hole 3 j The arc distance between the nozzle and the nozzle 4 j 、Injection hole 3 j The arc distance between them is shown in the following example, when n is 6, the injection hole 1 j and fuel injection hole 2 j The arc distance between the injection hole 2 j and fuel injection hole 3 j The arc distance between the nozzles 3 j and fuel injection hole 4 j The arc distance between them gradually decreases, and the injection hole 6 j and fuel injection hole 5 j The arc distance between the nozzles 5 j and fuel injection hole 4 j The arc distance between the injection holes 4 j and fuel injection hole 3 j The arc distance between the injection holes gradually decreases. The arc distance between the injection holes on the injection ring body is reasonably designed to improve the injection uniformity and ensure the injection uniformity when the injection ring is installed at any angle.

[0052] It should be noted that the arc line, arc line length and arc distance between the oil injection holes described in the above embodiments all refer to the arc line on the outer diameter circle of the winding where the contact point of the oil injection hole to the end winding of the motor stator is located.

[0053] Referring to Figures 1 to 5 , in this embodiment, at least one end of the ring body 11 is provided with at least one rib 111. This rib 111 can be square, trapezoidal, circular, triangular, or wavy in shape to facilitate deformation of the injection ring 10 during interference fit, thereby reducing stress and the possibility of fracturing the injection ring 10. Of course, in other embodiments, at least one rib 111 can be provided on both ends of the ring body 11. Alternatively, two, three, or another number of ribs 111 can be provided.

[0054] Referring to Figures 3 and 7, in this embodiment, a plurality of fixing lugs 112 can be further provided at one end of the ring body 11. The plurality of fixing lugs 112 are arranged along the circumference of the ring body 11. When the fuel injection ring 10 is installed, it can be fixedly connected to the housing of the motor through the fixing lugs 112, and at least one rib 111 is provided at the other end for cooperating with the stator core of the motor to achieve sealing, or a sealing ring is provided at the other end to achieve sealing.

[0055] Referring to Figures 1 to 5 , in this embodiment, the ring body 11 is provided with at least one circle of oil injection holes 12, and each circle of oil injection holes includes multiple groups of oil injection holes. For example, two circles of oil injection holes 12 may be provided, arranged axially along the ring body 11. The number of oil injection holes 12 in different circles may be the same or different, and the oil injection holes in different circles may be staggered along their circumferential direction. Of course, the oil injection holes 12 in the same circle of the ring body 11 may be slightly staggered along its axial direction, while their spraying directions still need to be consistent.

[0056] 1 to 6 , the present invention further provides a motor, wherein the motor 100 includes a housing 20, a stator 30, a first oil spray ring 41, and a second oil spray ring 42. A stator oil inlet 201 is provided at one end of the housing 20, wherein the first oil spray ring 41 and the second oil spray ring 42 have the same or similar structures as the oil spray ring 12 described in the above embodiment. The stator 30 is mounted in the housing 20, wherein the stator 30 includes a stator core 31 and a stator winding 32. The first oil spray ring 41 and the second oil spray ring 42 are located at both ends of the stator 30, with the first oil spray ring 41 being located at one end close to the stator oil inlet 201. Oil chambers 202 are formed between the first oil spray ring 41 and the second oil spray ring 42 and the housing 20, respectively. The oil chambers 202 formed between the first oil spray ring 41 and the second oil spray ring 42 and the housing 20 are connected via a stator core oil passage 311. It should be noted that the second oil spray ring 42 is mounted outside the winding at end A of the motor stator and is positioned and fixed by the housing 20 and stator core 31. One end of the first oil spray ring 41 is provided with a fixing lug 112. It is mounted outside the winding at end B of the motor stator and is positioned in conjunction with the stator core 31 and housing 20. Four screws penetrate the fixing lug 112 to secure it to the housing 20. Cooling oil flows through the stator oil inlet 201 on the housing 20 into the oil chamber 202 formed by the first oil spray ring 41 and the housing 20. A portion of the oil flows through the stator core oil passage 311 to the oil chamber 202 formed by the second oil spray ring 42 and the housing 20, cooling the stator core 31 in the process. The cooling oil in the first and second oil spray rings 41, 42 flows through the oil spray holes 12 in their ring bodies 11 and is sprayed onto the stator windings 32 at ends A and B of the stator for cooling.

[0057] It should be noted that the oil injection rings 12 on the first oil injection ring 41 and the second oil injection ring 42 are arranged radially from the outside to the inside and tilted away from the stator core 31 to ensure uniform oil injection to the stator winding 32 .

[0058] As shown in Figures 1 to 6 , the second oil injection ring 42's end faces mate with the housing 20 and stator core 31, respectively, achieving position and fixation through compression between the housing 20 and stator core 31. Consequently, the width of the ring body 11 of the second oil injection ring 42 is greater than the width of its installation location, placing the second oil injection ring 42 in an interference fit and forming a seal. Furthermore, to ensure better fixation and sealing, at least one rib 111 is provided at each end of the ring body 11 of the second oil injection ring 42. The width of the rib 111 is less than the thickness of the end face of the ring body 11. This allows for better deformation of the oil injection ring during interference fit, thereby reducing the possibility of stress fracture and achieving a better seal. Of course, two or another number of ribs 111 may also be provided. It should be noted that, since the flow distribution is adjusted by rationally designing the arc length between the various injection holes 12 on the injection ring 10, even if the installation angle of the second injection ring 42 changes, the flow distribution at each circumferential position will not change much, and good uniformity can still be ensured.

[0059] Referring to Figures 1 to 7 , in this embodiment, due to varying installation environments, the tolerances on the first oil injection ring 41 accumulate with the tolerances of the motor stator. Consequently, the first oil injection ring 41 must absorb a relatively large axial tolerance. Relying solely on interference fit to absorb this tolerance would create a significant risk of fracture. Therefore, multiple fixing lugs 112 are provided on the end face of the ring body 11 of the first oil injection ring 41 facing away from the stator core 31. Fixing bolts pass through these fixing lugs 112 and securely connect to the housing 20 to secure the first oil injection ring 41. In this embodiment, for example, four fixing lugs 112 are evenly distributed along the circumference of the ring body 11 of the first oil injection ring 41. This ensures that the direction and position of the spray holes in the first oil injection ring 41 remain unchanged during installation, allowing installation in any desired position.

[0060] Referring to Figures 1 to 7 , in this embodiment, at least one rubber pad 113 may be disposed between the fixing lug 112 and the housing 20. The rubber pad 113 is used to adjust the left and right position of the first oil injection ring 41, ensuring that the left side of the first oil injection ring 41 is tightly pressed against the stator core 31 under varying axial tolerances, thereby achieving reliable sealing on that side. Of course, the number of fixing lugs and rubber pads 113 may be expanded to other quantities.

[0061] Referring to Figures 6 and 7 , in this embodiment, the ring body 11 of the first oil spray ring 41 includes a first section 411 and a second section 412. One end surface of the first section 411 contacts the stator core 31, and the other end is connected to the second section 412. The axial surface of the second section 412 partially contacts the housing 20. The fixing lug 112 is provided on the end of the second section 412 distal from the first section 411. The first oil spray ring 41 is fixedly connected to the housing 20 via the fixing lug 112. In this embodiment, at least one rib 111 is provided on the end surface of the first section 411 that contacts the stator core 31. This rib 111 has the same or similar structure as the rib 111 described in the previous embodiment, ensuring a reliable seal between the first oil spray ring 41 and the stator core 31.

[0062] Referring to Figures 6 and 7 , in this embodiment, at least one circle of ribs 111 is provided on the portion of the second section 412 that contacts the housing 20. The ribs 111 are interference-fitted with the housing 20 to achieve a reliable seal between the first oil injection ring 41 and the housing 20. Of course, the ribs 111 may also be provided in other numbers. For example, two circles of ribs 111 are provided on the portion of the second section 412 that contacts the housing 20. The ribs 111 located near the stator core 31 form an interference fit with the housing 20, while the ribs 111 located away from the stator core 31 form an interference fit with the housing 20. This ensures a seal while also improving installation.

[0063] Referring to Figures 8, 9, and 10, in this embodiment, a sealing ring 114 may also be provided at the end surface where the first segment 411 contacts the stator core 31 and / or at the point where the second segment 412 contacts the housing 20. For example, the end of the first oil injection ring 41 proximal to the stator core 31 may be sealed with a sealing ring. This sealing ring can effectively absorb axial tolerances while also ensuring sealing. In this case, the rubber pad 113 between the fixing lug 112 of the first oil injection ring 41 and the housing 20 may be eliminated. Alternatively, the end of the first oil injection ring 41 proximal to the stator core 31 may be sealed with a sealing ring, while the contact area between the second segment 412 and the housing 20 may also be sealed with a sealing ring to further ensure the sealing performance of the first oil injection ring 41. Of course, it is also possible to only seal the contact area between the second segment 412 and the housing 20 with a sealing ring, in which case the rubber pad 113 between the fixing lug 112 of the first oil injection ring 41 and the housing 20 may be retained to accommodate tolerance adjustments. It should be noted that the sealing ring 114 can be rectangular, circular or in other shapes, as long as its sealing performance is guaranteed.

[0064] The present invention proposes an oil injection ring and a motor, which are designed with ribs on the end face of the oil injection ring. The ribs cooperate with the housing and the stator core to achieve sealing, so as to achieve reliable sealing without or with fewer seals, while simplifying the structure and reducing costs. At the same time, the oil injection ring can be better deformed during the interference compression process, thereby reducing the possibility of fracturing of the oil injection ring.

[0065] The present invention proposes an oil injection ring and a motor, wherein the oil injection holes on the ring body of the oil injection ring adopt a symmetrical design, so that the number of slide hole extraction holes required during mold injection can be reduced, thereby optimizing the mold design, improving product quality and reducing costs.

[0066] The present invention provides an oil injection ring and a motor, which improves oil injection uniformity by rationally designing the arc length distance between each oil injection hole on the ring body of the oil injection ring, thereby ensuring oil injection uniformity when the oil injection ring is installed at any angle.

[0067] The present invention proposes an oil injection ring and a motor. By designing a fixing lug and reasonably placing a number of rubber pads between the fixing lug and the housing, the left and right positions of the oil injection ring can be adjusted, so that the oil injection ring can be well pressed and fitted with the stator core under different axial tolerances, thereby achieving reliable sealing on this side.

[0068] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

[0069] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A fuel injection ring, characterized in that: include: A ring body, wherein a plurality of groups of oil injection holes are arranged on the ring body, the plurality of groups of oil injection holes are arranged along the circumference of the ring body, and at least one end of the ring body is provided with at least one convex rib; Each group of the oil injection holes includes at least two oil injection holes, and the oil injection holes obliquely penetrate the ring body, and the directions of the oil injection holes in the same group are the same.

2. The oil spray ring according to claim 1, characterized in that: The ring body is provided with at least one circle of the oil injection holes, and each circle of the oil injection holes includes a plurality of groups of the oil injection holes.

3. The oil spray ring according to claim 1, characterized in that: The arc length between two adjacent fuel injection holes in two adjacent groups is greater than the arc length between two adjacent fuel injection holes in the same group.

4. The oil spray ring according to claim 1, characterized in that: The plurality of fuel injection holes in the same group are symmetrically arranged on the ring body about a midpoint of an arc line between two of the fuel injection holes that are farthest from each other.

5. The oil spray ring according to claim 1, characterized in that: The arc distance between two adjacent oil injection holes in the same group gradually decreases along the edge toward the middle.

6. The oil spray ring according to claim 1, characterized in that: The shape of the convex rib includes square, trapezoid, circle, triangle or wave.

7. The oil spray ring according to claim 1, characterized in that: One end of the ring body is provided with a plurality of fixing lugs, and the plurality of fixing lugs are arranged along the circumference of the ring body.

8. A motor, characterized in that: include: A housing, one end of which is provided with a stator oil inlet; a stator mounted in the housing; The first oil injection ring and the second oil injection ring are respectively mounted at both ends of the stator, and the first oil injection ring The oil ring is located at one end close to the stator oil inlet; Wherein, the first oil injection ring and the second oil injection ring are the oil injection rings as described in any one of claims 1 to 6.

9. The motor according to claim 8, characterized in that The axes of the oil injection holes on the first oil injection ring and the second oil injection ring are inclined from the outside to the inside in a radial direction away from the stator core.

10. The motor according to claim 8, characterized in that The ring body width of the second oil injection ring is greater than the width of its installation position, and the second oil injection ring is fixed by extrusion between the housing and the stator core.

11. The motor according to claim 8, characterized in that At least one convex rib is disposed at both ends of the ring body of the second oil injection ring.

12. The motor according to claim 8, characterized in that The ring body of the first oil injection ring includes a first section and a second section. An end surface of the first section contacts the stator core, and an axial surface of the second section partially contacts the housing.

13. The motor according to claim 12, characterized in that The end surface of the first section that contacts the stator core is provided with at least one rib, and the end of the second section away from the first section is provided with a plurality of fixing lugs along its circumference, and the first oil injection ring is fixedly connected to the housing via the fixing lugs.

14. The motor according to claim 13, characterized in that It also includes a rubber pad, and at least one rubber pad is arranged between the fixing lug and the shell.

15. The motor according to claim 13, characterized in that At least one circle of convex ribs is arranged on the part of the second section that contacts the shell, and an interference fit is formed between the second section and the shell.

16. The motor according to claim 13, characterized in that Two circles of convex ribs are arranged on the part of the second section that contacts the shell. The convex ribs located close to the stator core and the shell are in an overfitting relationship, while the convex ribs located far from the stator core and the shell are in an interference fit.

17. The motor according to claim 13, characterized in that A sealing ring is provided at the end surface of the first section in contact with the stator core and / or at the contact point of the second section with the housing.

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