CN113410939B

CN113410939B - Motor and electric equipment

Info

Publication number: CN113410939B
Application number: CN202110600568.7A
Authority: CN
Inventors: 彭小明; 付强; 易四明; 刘福刚
Original assignee: Shenzhen Fengfa Science And Technology Development Co ltd; Shandong Wind Amperex Technology Ltd
Current assignee: Shenzhen Fengfa Science And Technology Development Co ltd; Shandong Wind Amperex Technology Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2023-03-14
Anticipated expiration: 2041-05-31
Also published as: CN113410939A

Abstract

The application provides a motor and electric equipment. The slinger belongs to this motor, and the slinger includes: the oil baffle ring body is provided with an annular oil groove, the annular oil groove is provided with a flow guide part, and the flow guide part is used for guiding the grease in the annular oil groove to a bearing raceway of the motor; the oil slinger is driven by a rotor of the motor to rotate relative to the oil baffle ring body, and grease thrown out in the rotating process of the oil slinger enters the oil ring groove. The motor of this design can realize transferring the rotatory splash lubricating grease of oil slinger and motor rotor to keeping off the oil ring body, keeps off in the oil ring body circulation retrieves the lubricating oil water conservancy diversion of splash back with lubricating oil to the bearing raceway in, solves the problem that bearing lubricating oil runs off, improves bearing lubrication's stability.

Description

Motor and electric equipment

Technical Field

The application relates to the field of motors, in particular to an oil scraper ring, a motor and electric equipment.

Background

When the rotor of the motor rotates at a high speed, lubricating grease in the bearing can splash to cause the loss of the lubricating grease, so that the lack of lubricating stability of the bearing is reduced when the motor runs for a long time.

Disclosure of Invention

An object of the application is to provide an oil slinger, thereby aim at guaranteeing the stability of bearing better to the high-efficient oil return of bearing.

In order to solve the technical problem, the following technical scheme is adopted in the application:

the application provides a slinger for a motor, the slinger includes:

the oil retaining ring body is provided with an annular oil groove, the annular oil groove is provided with a flow guide part, and the flow guide part can guide the grease in the annular oil groove to a bearing raceway of the motor;

the oil slinger is driven by a rotor of the motor to rotate relative to the oil baffle ring body, and grease thrown out in the rotating process of the oil slinger enters the oil surrounding groove.

According to an embodiment of the application, water conservancy diversion portion includes first inclined plane, first inclined plane is at least partly lateral wall face of ring oil groove, the one end on first inclined plane be used for with the bearing raceway sets up relatively.

According to an embodiment of the present application, the annular oil groove is provided in a bell-mouth shape with an opening gradually increasing.

According to an embodiment of the application, the oil slinger is nested and distributed on the inner side of the oil baffle ring body, the oil slinger and the oil baffle ring body are arranged at an interval, so that a gap is formed between the oil slinger and the oil baffle ring body, wherein at least one part of the gap is configured to be in a zigzag extending shape.

According to an embodiment of the application, be equipped with concave-convex structure on the relative surface of oil slinger with oil baffle ring body respectively, the oil slinger the concave-convex structure with oil baffle ring body between distribute with concave and protruding corresponding form to enclose into the tortuous gap that extends.

According to one embodiment of the application, one of the oil slinger and the oil retainer ring body is provided with an arc-shaped concave part, and the other one is provided with an angular convex part corresponding to the arc-shaped concave part; or one of the oil slinger and the oil baffle ring body is provided with an angular concave part, and the other one is provided with an arc convex part, and the angular concave part corresponds to the arc convex part.

According to an embodiment of the application, the oil baffle ring body is provided with a first protruding part protruding relative to the inner bottom of the oil ring groove, and the oil throwing ring is provided with a second protruding part protruding relative to the inner bottom of the oil ring groove; at least a portion of the gap is formed between the first boss and the second boss, the gap having an opening between an end of the first boss and an end of the second boss.

According to an embodiment of the present application, the oil ring groove is located at a side portion of the first protrusion, the flow guide portion is configured by a side surface of the first protrusion, and the side surface of the first protrusion is disposed obliquely with respect to a surface of an end portion of the first protrusion.

According to an embodiment of the application, the protruding heights of the first protruding part and the second protruding part relative to the inner bottom of the annular oil groove are less than or equal to the depth of the annular oil groove; the oil slinger is provided with a second inclined surface which extends to the end of the second boss.

According to an embodiment of the present application, a slope of the second inclined surface is equal to or less than a slope of a side surface of the first projecting portion.

According to another aspect of the present application, there is also provided an electric machine including:

a rotor;

a bearing cap;

a bearing having a bearing raceway;

in the oil slinger according to any one of the embodiments above, the oil slinger body of the oil slinger is disposed between the bearing and the bearing cover, the oil ring groove of the oil slinger body corresponds to and communicates with the bearing raceway, and the oil slinger of the oil slinger is in transmission connection with the rotor and rotates with the rotor.

According to an embodiment of the present application, the oil baffle ring body is connected with the bearing cap.

According to another aspect of the present application, there is also provided an electromotive device including:

the electric machine of any of the above embodiments;

and the actuating component is in transmission connection with the rotor of the motor, so that the actuating component can move under the driving of the rotor.

In this application, the oil slinger includes the oil slinger and is provided with the oil slinger body that has the ring oil groove, the oil slinger is used for rotating under motor rotor's drive, and in rotating the in-process with grease (specifically for example including the lubricating grease that plays the lubrication action) throw into the ring oil groove, wherein, the ring oil groove is provided with water conservancy diversion portion, and via the grease guide bearing raceway of water conservancy diversion portion in with the ring oil groove, can effectively prevent bearing grease from splashing everywhere, and realize accurate to the bearing, the closed loop is retrieved the grease high-efficiently, the problem of the bearing oil deficiency stability reduction when having solved the motor and moving for a long time, guarantee the stability of bearing when the long-time operation better.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic structural diagram illustrating an electric machine according to an embodiment.

Fig. 2 isbase:Sub>A schematic structural view ofbase:Sub>A sectionbase:Sub>A-base:Sub>A in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B shown in fig. 2.

Fig. 4 is a schematic view of an oil retainer ring according to an embodiment.

Fig. 5 is a schematic structural view of the section C-C in fig. 4.

Fig. 6 is an enlarged structural view of the D portion shown in fig. 5.

Fig. 7 is a schematic structural view of an oil slinger according to an embodiment.

Fig. 8 is a schematic structural view of a section E-E in fig. 7.

Fig. 9 is an enlarged structural view of the F portion shown in fig. 8.

The reference numerals are explained below:

a motor 100; a stator 110; a rotor 120; a motor shaft 121; a bearing 130; an outer ring 131; an inner ring 132; the bearing race 133; a bearing cap 140; a slinger 150; an oil retainer ring body 151; an oil ring groove 1511; a flow guide 1512; a first boss 1513; a arcuate recess 1514; a angular protrusion 1515; a containment region 1516; an oil slinger 152; the second inclined surface 1521; a second boss 1522; b an arc-shaped recess 1523; b a prismatic projection 1524; a slit 153; the opening 1531 of the slot.

Detailed Description

While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.

Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

The preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the present specification.

Referring to fig. 1 and 2, fig. 1 and 2 are schematic structural diagrams of a motor 100 according to an embodiment of the present disclosure.

The motor 100 of the present embodiment includes a stator 110, a rotor 120, a bearing 130, a slinger 150, a bearing cap 140, a motor shaft 121, and other components. More specifically, as shown in fig. 2, the stator 110 is located inside the motor 100, and the rotor 120 is disposed in association with the stator 110 such that the rotor 120 rotates relative to the stator 110 in response to operation of the motor 100. The motor shaft 121 is drivingly connected to the rotor 120, and when the rotor 120 rotates, the motor shaft 121 is driven to rotate.

As shown in fig. 3, the bearing 130 has an inner race 132, an outer race 131, and a bearing raceway 133 between the inner race 132 and the outer race 131. The inner race 132 is connected to the motor shaft 121 and rotates with the motor shaft 121. The slinger 150 is located at a position between the bearing cover 140 and the bearing 130 in the axial direction. The purpose is to efficiently and accurately recover grease for lubrication from the bearing 130 by using the slinger 150, and to avoid the problem of reduced oil shortage stability of the bearing 130 when the motor 100 works for a long time, so that the motor 100 runs more reliably and durably.

It can be understood that, as shown in fig. 2, the oil slinger 150 and the bearing cover 140 may be disposed on the same bearing 130 on the side axially far from the rotor 120, so as to recover grease for lubrication from the axially outer side of the bearing 130, and reliably solve the problem of oil shortage of the bearing 130. Of course, the slinger 150 and the bearing cap 140 may be disposed on both axial sides of the bearing 130 as required, so as to recover grease for lubrication on both axial sides of the bearing 130.

Further, as shown in fig. 2, two bearings 130 are disposed on the motor shaft 121, and the two bearings 130 are disposed on two sides of the rotor 120 in the axial direction. For the two bearings 130, slingers 150 may be provided to recover grease for lubrication, respectively. Of course, one of the bearings 130 may be provided with the slinger 150 to recover grease for lubrication, as required.

It is understood that the motor 100 is used in an electrically powered device, and the motor 100 is particularly useful for driving an actuator of an electrically powered device. In more detail, for example, the motor shaft 121 of the motor 100 is driven by the rotor 120 to rotate, and the motor shaft 121 of the motor 100 and the actuator may be directly connected, or a transmission mechanism may be used to transmit power between the motor shaft 121 of the motor 100 and the actuator, so as to realize the transmission connection between the motor 100 and the actuator, and thus, the motor 100 drives the actuator.

For example, the electrically powered device may be an electric vehicle, and accordingly, the actuating component of the electric vehicle may be embodied as a wheel. As another example, the electrically powered device may be an aircraft (e.g., a drone), and accordingly, the implement component of the aircraft may be embodied as a blade. For another example, the electric device may be an electric tool, such as an electric saw or a stirrer, and the actuating element may be a stirring blade or a stirring paddle. Alternatively, the motor 100 may be embodied as a switched reluctance motor, and the electric device may be a machine using the switched reluctance motor as a driving member.

It is understood that the specific type of the electric device is not limited to the specific form listed above, and those skilled in the art can understand the specific form of the electric device in combination with the applicable scenario of the electric motor 100, and it is not exhaustive here, but all that fall within the protection scope of the present exemplary embodiment without departing from the design concept of the slinger 150 or the electric motor 100.

In the following embodiments, examples of the slinger 150 of the present application will be explained.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a motor 100 provided with the slinger 150 according to an embodiment.

In one embodiment, slinger 150 includes a slinger body 151 and a slinger 152. The oil slinger 152 and the oil baffle ring body 151 can rotate relatively.

Specifically, for example, the oil slinger 152 is adapted to be drivingly connected to the rotor 120 and rotate with the rotor 120. More specifically, the oil slinger 152 is adapted to be connected to the motor shaft 121 and is rotatable with the motor shaft 121. The rotor 120 drives the oil slinger 152 to rotate by driving the motor shaft 121.

The oil retainer 151 is disposed between the bearing cap 140 and the bearing 130. Referring to fig. 4, fig. 4 is a schematic structural diagram of a slinger 150 according to an embodiment. The oil slinger body 151 is annular such that an accommodation area 1516 is formed therein. The oil slinger body 151 is nested and distributed outside the oil slinger 152 in a manner of accommodating the oil slinger 152 by utilizing the accommodating area 1516, and is arranged at a distance from the oil slinger 152 so as to realize relative rotation between the two.

The oil slinger 152 is adapted to rotate relative to the oil slinger body 151 upon actuation of the rotor 120 of the motor 100. Specifically, for example, the oil slinger 152 is adapted to be coupled to the motor shaft 121 and rotate with the motor shaft 121. More specifically, for example, the oil slinger 152 is thermally sleeved on the motor shaft 121 to be connected with the motor shaft 121 and rotate with the motor shaft 121.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view of a slinger 150 according to an embodiment. The oil trap ring body 151 is provided with a ring oil groove 1511, and in the motor 100, the ring oil groove 1511 is disposed corresponding to the bearing raceway 133 of the bearing 130 and communicates with the bearing raceway 133. The oil ring groove 1511 and the oil slinger 152 are disposed so that the grease thrown out during rotation of the oil slinger 152 enters the oil ring groove 1511. As shown in fig. 3 and 5, the ring oil groove 1511 is provided with a flow guide portion 1512, and the flow guide portion 1512 is used for guiding grease in the ring oil groove 1511 to the bearing raceway 133 of the motor 100.

Thus, in the working process of the motor 100 provided with the oil slinger 150 of the embodiment, the motor shaft 121 rotates to drive the oil slinger 152 to rotate, in the rotating process of the oil slinger 152, grease is thrown out due to centrifugal force, the oil slinger 152 and the grease splashed by the rotation of the rotor 120 are transferred into the ring oil groove 1511, the grease in the ring oil groove 1511 is guided by the guide part 1512 and is discharged into the bearing raceway 133, so that the grease in the bearing 130 forms a closed loop by throwing and guiding backflow, and the whole flow path is clearly identified by the driving of the oil slinger 152 and the guiding of the guide part 1512, so that the oil return is efficient and accurate, the grease of the bearing 130 can be effectively prevented from splashing around, meanwhile, the problem of reduction of the oil shortage stability of the bearing 130 during long-time operation of the motor 100 is better solved, and the stability of the bearing 130 during long-time operation is better ensured.

In one example, the oil ring groove 1511 may be a ring-shaped structure disposed continuously along the circumference of the oil baffle ring body 151, so that a good grease collecting effect may be formed at each position around the oil baffle ring body 151.

In an example, it is further preferable that the flow guiding portion 1512 may be an annular structure continuously disposed along the circumferential direction of the oil blocking ring body 151, so that oil return at different positions in the circumferential direction of the bearing 130 is more uniform, a situation of partial oil shortage of the bearing 130 is avoided, and an effect of improving the oil shortage of the bearing 130 is better.

Of course, in other embodiments, the annular oil groove 1511 may be designed to have a circumferentially discontinuous structure, or the flow guide portion 1512 may be designed to have a circumferentially discontinuous structure.

In one embodiment, it is preferable for the motor 100 to provide an oil trap ring body 151 coupled to the bearing cap 140. Specifically, for example, the oil retainer ring 151 and the bearing cap 140 are coupled together by screws, so that the oil retainer ring 151 and the bearing cap 140 are fixed as a single body.

In one example, as shown in fig. 3 and 5, the flow guide portion 1512 includes a first inclined surface that is at least a portion of a sidewall surface of the oil ring groove 1511, and one end of the first inclined surface is configured to be disposed opposite to the bearing raceway 133. Like this, the grease in the ring oil groove 1511 can flow to the bearing raceway 133 in high-efficient, accurately via the first inclined plane water conservancy diversion, when realizing high-efficient, accurate water conservancy diversion, dependable performance, have simple structure, easily batch manufacturing, sturdy structure, economical and practical's advantage.

For example, as shown in fig. 3, an arc-shaped dashed arrow in fig. 3 roughly illustrates a flow guiding direction of the first inclined surface facing the grease, and one end of the first inclined surface (specifically, it can be understood that the end of the first inclined surface close to the bearing raceway 133 in the illustration) is arranged opposite to the bearing raceway 133, so that the bearing raceway 133 is located at an end position of the first inclined surface in the flow guiding direction, and the grease can directly enter the bearing raceway 133 due to flow inertia after leaving the first inclined surface, and the guiding performance is good and the performance is reliable.

In one example, as shown in fig. 3 and 5, the oil ring groove 1511 is provided in a bell mouth shape with an opening gradually increasing. On the one hand, the bell-mouth-shaped oil ring groove 1511 has better processability, can better ensure the product precision, reduce the processing and manufacturing cost, and realize the economic and practical purposes. On the other hand, the ring oil groove 1511 of horn mouth shape has bigger opening area, like this, ring oil groove 1511 is bigger to the grease collection scope, the grease runs off still less, the grease recovery effect is better, solve bearing 130 starvation problem better, and correspondingly, the tank bottom position volume of ring oil groove 1511 of horn mouth shape is less relatively, is favorable to promoting like this that the grease in the ring oil groove 1511 leads backward flow to bearing 130 through water conservancy diversion portion 1512, the grease accumulation volume in the ring oil groove 1511 is few, it is also more efficient to return oil.

In one example, as shown in fig. 3, it is further preferable that the ring oil groove 1511 has two side wall surfaces, one of which is a first inclined surface, and the other of which is a groove side wall, and the groove side wall is distributed substantially in a splay shape with the first inclined surface, so that the bell mouth-shaped ring oil groove 1511 is configured. Wherein, the groove sidewall is located the radial outside of ring oil groove 1511, and the first inclined plane is located the radial inboard of ring oil groove 1511, and the opening of ring oil groove 1511 is towards bearing raceway 133 and communicates with it. One end of the side wall of the groove far away from the bottom in the ring oil groove 1511 extends to the outer ring 131 of the bearing 130, so that a part of the opening of the ring oil groove 1511 is shielded by the outer ring 131 of the bearing 130, and the design realizes that the ring oil groove 1511 can collect grease flowing out from the bearing 130 to the maximum extent, thereby further reducing the grease loss.

In an example, as shown in fig. 3 and 5, the ring oil groove 1511 has an inner bottom surface, and the inner bottom surface connects the groove sidewall and the first inclined surface of the transition ring oil groove 1511, so that the cross section of the space in the ring oil groove 1511 is trapezoidal, and by such a structural design, the amount of residual grease at the bottom in the ring oil groove 1511 is small, accordingly, the amount of oil discharged from the ring oil groove 1511 to the bearing raceway 133 via the diversion part 1512 is large, the oil return effect of the bearing 130 is better, the oil shortage of the bearing 130 is better improved, and the grease is not easily remained or accumulated in the ring oil groove 1511, so that the risk of deterioration of the residual grease is reduced, and the product reliability is higher.

Further, as shown in fig. 3 and 5, the first inclined surface of the ring oil groove 1511 is provided obliquely with respect to the inner bottom surface of the ring oil groove 1511.

In one example, as shown in fig. 6, it is further preferable that the slope λ 1 of the first inclined surface of the oil ring groove 1511 is in a range of 45 ° to 75 °. Still further preferably, the slope λ 1 of the first inclined surface of the oil ring groove 1511 has a value range of 60 °. The design can ensure that the first inclined plane has higher water conservancy diversion efficiency.

The slope of the first inclined surface of the oil groove 1511 may be specifically understood as an inclination angle of the first inclined surface with respect to the inner bottom surface of the oil groove 1511 (or the radial direction of the oil baffle ring body 151).

In one example, as shown in fig. 3, the oil slinger 152 is nested inside the oil slinger body 151, and the oil slinger 152 and the oil slinger body 151 are spaced apart from each other such that a gap 153 is formed between the oil slinger 152 and the oil slinger body 151. The gap 153 allows waste oil in the bearing 130 to be discharged outward along the gap 153.

Wherein at least a part of the slits 153 are configured in a zigzag extending shape. By utilizing the zigzag extending gap 153, the misdischarge of grease in the oil return process of the bearing 130 can be reduced, so that the grease loss of the bearing 130 is further reduced, and the stability of the bearing 130 is better ensured. And the shape of the zigzag extending gap 153 has a larger assembly fault tolerance rate, the requirement on the assembly precision between the oil slinger 152 and the oil baffle ring body 151 is correspondingly lower, and the yield of products can be improved.

In more detail, as shown in fig. 3, the gap 153 is configured to be a labyrinth shape like a zigzag, so that the misdischarge of the grease during the oil return process of the bearing 130 can be better reduced. Of course, in other embodiments, the slit 153 may be configured in other meandering shapes, such as an S-shaped meandering shape.

More specifically, as shown in fig. 3, the oil slinger 152 and the oil baffle ring body 151 are respectively provided with a concave-convex structure on the opposite surfaces thereof, and the concave-convex structure of the oil slinger 152 and the concave-convex structure of the oil baffle ring body 151 are distributed in a concave-convex corresponding manner to each other so as to form a gap 153 extending in a zigzag manner.

In a specific example, as shown in fig. 4 and 5, the oil deflector ring body 151 is provided with an a-arc concave portion 1514 and an a-angular convex portion 1515. Referring to fig. 7, fig. 7 is a schematic structural diagram of an oil slinger 152 according to an embodiment. As will be understood from fig. 8 and 9, the oil slinger 152 is provided with a b-arc recess 1523 and a b-angular protrusion 1524. As shown in fig. 3, the a-arc recess 1514 and the b-arc protrusion 1524 are arranged in a radial direction, the a-arc protrusion 1515 and the b-arc recess 1523 are arranged in a radial direction, so as to form a zigzag extending gap 153, and the gap 153 forms a structure with an arc shape on one side and an edge angle on the other side at the corner, which has a larger fault tolerance rate, so that the product quality is more reliable. And such structure is also difficult to be stopped up, more does benefit to the functional reliability of guarantee oil extraction.

Of course, it is understood that the structures of the above specific examples may be replaced by other structures, specifically, the arc-shaped convex part is disposed corresponding to the angular concave part.

In a specific example, more preferably, as shown in fig. 3, the concave-convex structure on the oil baffle ring body 151 and the concave-convex structure on the oil slinger 152 are arranged in a 180 ° rotational symmetry manner, the fault tolerance between the structures is higher, and the product quality is more reliable.

In one example, more preferably, as shown in fig. 5 and 6, the oil deflector ring body 151 is provided with a first protrusion 1513 disposed in the R direction (or in the axial direction of the oil deflector ring body 151) with respect to the inner bottom protrusion of the ring oil groove 1511. As shown in fig. 8 and 9, the oil slinger 152 is provided with a second boss 1522 provided so as to be convex in the R direction (or in the axial direction of the oil slinger 152) with respect to the inner bottom of the ring oil groove 1511. As shown in fig. 3, at least a portion of the slit 153 is formed between the first protrusion 1513 and the second protrusion 1522, the slit 153 has an opening, and the opening 1531 of the slit 153 is located between the end of the first protrusion 1513 and the end of the second protrusion 1522. Through the structural design, the position of the opening 1531 of the gap 153 can have a certain protruding height relative to the inner bottom of the ring oil groove 1511, so that the probability of mistakenly discharging the grease thrown out by the oil slinger 152 along the gap 153 in the oil return process is reduced, and the grease thrown out by the oil slinger 152 can be collected or reflowed to the bearing 130 by the ring oil groove 1511 to a large extent, so that the oil shortage of the bearing 130 is better improved, and the stability of the bearing 130 is further improved.

In one example, more preferably, as shown in fig. 6, the oil ring groove 1511 is located at a side of the first protrusion 1513, and a flow guide 1512 is configured by a side surface of the first protrusion 1513, that is, the side surface of the first protrusion 1513 is formed as a first inclined surface for guiding flow. Thus, the oil deflector ring 151 has high integration level and compact structure, which simplifies the structure and shape of the oil deflector ring 151 to a certain extent, and is beneficial to reducing the cost of the product, and meanwhile, is also beneficial to the application of the oil deflector ring 150 in the structure of the small motor 100.

Here, it is further preferable that, as shown in fig. 3 and 6, a side surface of the first protrusion 1513 is disposed obliquely with respect to a surface of an end portion of the first protrusion 1513. Therefore, grease can enter the bearing raceway 133 at the end position of the first protrusion 1513 in favor of the fluid inertia after being separated from the first protrusion 1513, the flow guiding effect of the flow guiding portion 1512 is better guaranteed, the oil return effect of the bearing 130 is further improved, and the problem of oil shortage of the bearing 130 is better solved.

More preferably, as shown in fig. 6, the surface of the end of the first protrusion 1513 is a flat surface and forms a corner transition with the first inclined surface. In this way, the flow effect of grease escaping from the first boss 1513 by fluid inertia to be guided into the bearing race 133 is better.

In one example, as shown in fig. 3, the protrusion heights of the first protrusion 1513 and the second protrusion 1522 relative to the inner bottom of the oil ring groove 1511 are each less than or equal to the depth of the oil ring groove 1511.

As shown in fig. 8 and 9, the oil slinger 152 is provided with a second inclined surface 1521, and the second inclined surface 1521 extends to the end of the second boss 1522. Thus, grease thrown out by the oil slinger 152 can enter the ring oil groove 1511 more easily, so that the splashing of the grease is reduced, the oil return of the bearing 130 is realized more efficiently, and the problem of oil shortage of the bearing 130 is solved better.

In one example, the slope λ 2 of the second inclined surface 1521 is equal to or less than the slope λ 1 of the side surface of the first protrusion 1513. In this way, the grease thrown by the oil slinger 152 enters the ring oil groove 1511, and the flow process resistance of the grease in the ring oil groove 1511 guided into the bearing raceway 133 by the guide portion 1512 is smaller, and the flow is more efficient, so that the oil return effect of the bearing 130 is improved.

In one example, as shown in fig. 9, it is further preferable that the slope λ 2 of the second inclined surface 1521 is in a range of 10 ° to 45 °. Still more preferably, the slope λ 2 of the second inclined surface 1521 is in the range of 30 °. The design can guarantee the oil slinger 152 to the oil slinger efficiency in the ring oil groove 1511 and the bearing raceway 133.

The slope of the second inclined surface 1521 may be specifically understood as an inclination angle of the second inclined surface 1521 with respect to the inner bottom surface of the ring oil groove 1511 (or the radial direction of the oil slinger 152).

As described above, in the slinger 150, the motor 100 having the slinger 150 and the electric device having the motor 100 according to the present embodiment, the slinger 150 includes the slinger 151 and the slinger 152, the slinger 151 and the bearing cap 140 are fixed integrally, the slinger 151 is provided with the ring oil groove 1511 for recovering the splashed lubricating oil, and the slinger 152 and the rotor 120 of the motor 100 are fixed integrally. Through the design, lubricating grease splashed by the rotation of the oil slinger 152 and the rotor 120 of the motor 100 can be transferred to the oil baffle ring body 151, and the splashed lubricating oil is recycled by the oil baffle ring body 151 and then is guided into the bearing roller path 133, so that the problem of lubricating oil loss of the bearing 130 is solved, and the lubricating stability of the bearing 130 is improved. And through the oil scraper ring 150 structure that this embodiment provided, synthesize, still have dependable performance, solid structure, economical and practical's advantage when realizing the oil return purpose.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An electric motor comprising a rotor, a bearing cap, a bearing having a bearing raceway, a slinger comprising:

the oil retaining ring body is arranged between the bearing and the bearing cover, the oil retaining ring body is provided with an oil ring groove, the oil ring groove corresponds to and is communicated with the bearing raceway, the oil ring groove is provided with a flow guide part, and the flow guide part is used for guiding grease in the oil ring groove to the bearing raceway of the motor;

the oil slinger is in transmission connection with the rotor and rotates along with the rotor, the oil slinger is nested and distributed on the inner side of the oil baffle ring body, the oil slinger and the oil baffle ring body are arranged at intervals, so that a gap is formed between the oil slinger and the oil baffle ring body, the oil slinger is used for rotating relative to the oil baffle ring body under the driving of the rotor of the motor, and grease thrown out in the rotating process of the oil slinger enters the oil ring groove;

the guide part comprises a first inclined surface, the circular oil groove is provided with two side wall surfaces, one side wall surface is the first inclined surface, the other side wall surface is a groove side wall, the groove side wall is positioned on the radial outer side of the circular oil groove, the first inclined surface is positioned on the radial inner side of the circular oil groove, an opening of the circular oil groove faces the bearing raceway and is communicated with the bearing raceway, and one end of the first inclined surface is opposite to the bearing raceway;

the oil baffle ring body is provided with a first bulge which is convexly arranged relative to the inner bottom of the oil ring groove, the oil ring groove is positioned on the side part of the first bulge, the side surface of the first bulge is formed into a first inclined surface for guiding flow, and the side surface of the first bulge is obliquely arranged relative to the surface of the end part of the first bulge;

the oil throwing ring is provided with a second protruding part protruding relative to the inner bottom of the oil ring groove; at least a portion of the gap is formed between the first boss and the second boss, the gap having an opening between an end of the first boss and an end of the second boss;

the protruding heights of the first protruding part and the second protruding part relative to the inner bottom of the annular oil groove are less than or equal to the depth of the annular oil groove; the oil slinger is provided with a second inclined surface which extends to the end of the second boss.

2. The electric machine of claim 1,

the annular oil groove is provided in a bell mouth shape with an opening gradually increasing.

3. The machine according to claim 1 or 2,

at least a portion of the slits are configured in a meandering shape.

4. The electric machine of claim 3,

concave-convex structures are respectively arranged on the opposite surfaces of the oil slinger and the oil baffle ring body, and the concave-convex structures of the oil slinger and the concave-convex structures of the oil baffle ring body are distributed in a concave-convex corresponding mode so as to form a zigzag extending gap.

5. The electric machine of claim 4,

one of the oil slinger and the oil baffle ring body is provided with an arc-shaped concave part, and the other one is provided with an angular convex part which corresponds to the arc-shaped concave part; or

One of the oil slinger and the oil baffle ring body is provided with an angular concave part, and the other one is provided with an arc convex part, and the angular concave part corresponds to the arc convex part.

6. The electric machine of claim 1,

the slope of the second inclined surface is equal to or less than the slope of the side surface of the first boss.

7. The machine according to claim 1 or 2,

the oil blocking ring body is connected with the bearing cover.

8. An electrically powered device, comprising:

the electric machine of any one of claims 1 to 7;