CN221428683U - Motor - Google Patents

Abstract

The utility model relates to a motor, comprising a stator, a rotor and a motor shell, wherein the motor shell comprises: a housing peripheral wall having an annular shape and defining an axis; a housing side wall located at one end of the housing peripheral wall in the axial direction, the housing side wall being provided with: the bearing mounting part is used for mounting a bearing, the bearing is used for supporting the rotor, and a first runner inlet and a first runner outlet are formed in the bearing mounting part; the oil blocking rib is located between the peripheral wall of the shell and the bearing mounting part in the radial direction and extends towards the stator along the axial direction, and the oil blocking rib is arranged so that oil enters the first flow passage inlet under the action of gravity. The utility model adopts an open bearing, utilizes oil for cooling the motor, and realizes lubrication of the bearing by processing an oil inlet and outlet path on a bearing mounting part and leading out the oil from the cooling path and utilizing the action of gravity. The design does not need to split the shell, and reduces the manufacturing cost.

Description

Motor

Technical Field

The utility model relates to the technical field of motors, in particular to a motor.

Background

In the early development stage of new energy automobiles, most of motors adopt a water cooling scheme, and bearings supporting the motor rotor generally adopt closed bearings and are lubricated by grease media enclosed in the bearings. The motor can meet the requirements of cooling and lubrication under the conditions of low motor rotating speed and low service life requirement. However, with the high-speed development of new energy automobile technology and the increasing requirements of the market on the power density and the rotating speed of the motor of the new energy automobile, the scheme of adopting a water cooling mode to cool the motor and combining grease to lubricate the bearing has hardly met the market needs.

Disclosure of utility model

Therefore, the utility model provides the following technical scheme.

An electric machine comprising a stator, a rotor, and a machine housing, the machine housing comprising:

a housing peripheral wall that is annular and defines an axis;

the casing lateral wall, the casing lateral wall is located in the axis direction the one end of casing perisporium, be provided with on the casing lateral wall:

The bearing installation part is used for installing a bearing, the bearing is used for supporting the rotor, and the bearing installation part is provided with a first runner inlet and a first runner outlet;

The oil blocking rib is located between the peripheral wall of the shell and the bearing mounting part in the radial direction and extends towards the stator along the axial direction, and the oil blocking rib is arranged so that oil enters the first flow passage inlet under the action of gravity.

According to one aspect of the utility model, the housing side wall further has a sleeve disposed between the bearing mounting portion and the bearing.

According to one aspect of the utility model, the shaft sleeve is provided with a second flow passage inlet and a second flow passage outlet, the second flow passage inlet is at least partially overlapped with the first flow passage inlet in the radial direction, and the second flow passage outlet is at least partially overlapped with the first flow passage outlet in the radial direction.

According to one aspect of the utility model, the sleeve comprises an annular sleeve peripheral wall and a sleeve side wall located on one side of the sleeve peripheral wall, and sleeve oil inlet flow passages and sleeve oil outlet flow passages are arranged in the sleeve peripheral wall and the sleeve side wall, wherein the sleeve oil inlet flow passages are in fluid communication with the second flow passage inlet, and the sleeve oil outlet flow passages are in fluid communication with the second flow passage outlet.

According to an aspect of the present utility model, in a use state of the motor, a straight line passing through the first flow passage inlet and intersecting the axis is not coincident with a gravitational direction, as viewed in the axial direction.

According to one aspect of the utility model, the number of the oil baffle ribs is one, and the included angle between the oil baffle ribs and the horizontal direction is smaller than the included angle between the straight line and the horizontal direction.

According to one aspect of the utility model, when the motor is in use, a straight line passing through the first flow passage inlet and intersecting the axis coincides with the gravity direction, the number of the oil baffle ribs is two, and the first flow passage inlet is located between the two oil baffle ribs in the circumferential direction.

According to an aspect of the present utility model, a straight line passing through the first flow passage outlet and intersecting the axis is not coincident with the gravitational direction as viewed in the axial direction in the use state of the motor.

According to an aspect of the present utility model, an oil feed passage and an oil discharge passage are formed in the housing peripheral wall.

According to one aspect of the utility model, the device further comprises an oil guiding device having an oil injection runner in fluid communication with the oil feed passage via an oil passage on the stator.

The utility model adopts an open bearing, utilizes the oil liquid for cooling the motor, processes the oil inlet and outlet channels on the bearing mounting part, and leads the oil liquid out of the cooling channels, and utilizes the action of gravity to lubricate the bearing. The design does not need to split the shell, and reduces the manufacturing cost.

Drawings

The features and advantages of the present utility model will be apparent from the detailed description provided hereinafter with reference to the accompanying drawings. It is to be understood that the following drawings are merely schematic and are not necessarily drawn to scale, and are not to be construed as limiting the utility model, in which:

fig. 1 shows a perspective view of an electric machine according to an exemplary embodiment of the utility model.

Fig. 2 shows an exploded view of an electric machine according to an exemplary embodiment of the utility model.

Fig. 3 shows a front view of an electric machine according to an exemplary embodiment of the utility model.

Fig. 4 shows a cross-sectional view along line A-A in fig. 3.

Fig. 5 shows a cross-sectional view along line B-B in fig. 3.

Fig. 6 shows an enlarged view at C in fig. 5.

Detailed Description

Embodiments of the present utility model are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding and enabling description of the utility model to one skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, any combination of the features and elements described below is contemplated to implement the utility model, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered features or limitations of the claims except where explicitly set out in a claim.

Description of orientations such as "upper", "lower", "inner", "outer", "radial", "axial", etc. which may be used in the following description are for convenience of description only and are not intended to limit the inventive arrangements in any way unless explicitly stated. Furthermore, terms such as "first," "second," and the like, are used hereinafter to describe elements of the present utility model, and are merely used for distinguishing between the elements and not intended to limit the nature, sequence, order, or number of such elements.

Fig. 1 shows a perspective view of an electric machine according to an exemplary embodiment of the utility model. As can be seen from fig. 1, the motor comprises a motor housing 1, the motor housing 1 defining a cavity radially inside thereof, in which cavity a stator (not shown) and a rotor (not shown) arranged radially inside the stator are fixed. The motor housing 1 includes a housing peripheral wall 12 having a ring shape so as to define an axial direction, and a housing side wall 13 connected to the housing peripheral wall 12 and located at one end of the housing peripheral wall 12 in the axial direction, so that the motor housing 1 has a semi-closed structure having an opening at one end. The housing peripheral wall 12 and the housing side wall 13 are preferably integrally formed, for example, by casting. The open side of the motor housing 1 may be connected to the reduction gear or it may be closed by a separate end cap, for example by bolting or the like.

A bearing mounting portion 11 extending in the axial direction of the motor housing 1 and having a ring shape is provided in the middle of the housing side wall 13, a bearing 2 is provided in a cavity formed by the bearing mounting portion 11, and the rotor is rotatably supported by the bearing 2. Preferably, a sleeve 3 is provided between the bearing 2 and the bearing mounting 11, the sleeve 3 being made of a wear resistant material such as stainless steel. The machining accuracy of the bearing mounting portion 11 can be relaxed by the sleeve 3, and axial play between the bearing 2 and the bearing mounting portion 11 can be overcome.

In order to accommodate the higher rotational speeds of the motor and provide better cooling performance, the motor of the present utility model employs liquid cooling. In addition, the bearing 2 is an open bearing and is lubricated with oil that cools the motor. Accordingly, it is necessary to provide a flow path for the oil for lubricating the bearing 2 in the bearing mounting portion 11 of the housing side wall 13. In order to avoid the disassembly of the shell and also avoid the too long processing path to increase the processing cost, the utility model proposes the following improvement.

As is clear from fig. 1 and 3, an oil feed passage 123 and an oil discharge passage 121 are opened inside the body of the housing peripheral wall 12, and an oil pump (not shown) is used to circulate oil between the oil feed passage 123 and the oil discharge passage 121 and the associated oil passages, thereby forming a circulation circuit in which the bearing 2 is lubricated by the oil flowing therein. The motor may be part of an electric drive system including the motor and the speed reducer, and the lubrication circuit of the motor and the speed reducer may be in communication. Thus, the circulation oil path includes an oil path in the decelerator, and the electric drive system may be provided with only one oil pump.

As can be seen in connection with fig. 1 and 2, the motor further comprises an oil guiding device 4, a first fluid passage inlet 111 provided in the bearing mounting portion 11 and a second fluid passage inlet 31 provided in the sleeve 3. The oil guiding device 4 is connected to the casing peripheral wall 12 and is provided with an oil injection flow passage 41, and by the arrangement of the oil guiding device 4, the increase of cost caused by the direct processing of an oil passage on the motor casing 1 can be avoided.

Further referring to fig. 4 to 6, the oil injection flow passage 41 may extend obliquely in a direction at an angle to the axial direction, specifically, from a side near the middle of the casing peripheral wall 12 to a side near the casing side wall 13, the inlet of the oil injection flow passage 41 is disposed on the body of the oil guiding device 4, and the outlet faces the casing side wall 13 of the motor casing 1. The oil flowing out from the outlet of the oil injection flow passage 41 may flow to the first flow passage inlet 111 by gravity. The second flow path inlet 31 corresponds to the first flow path inlet 111, and the first flow path inlet 111 and the second flow path inlet 31 may be completely overlapped. As an alternative embodiment, the first and second flow inlets 111 and 31 may be staggered by a certain angle, but not completely staggered. After entering the inner cavity of the motor housing 1 through the outlet of the oil injection flow passage 41, the oil can sequentially flow through the first flow passage inlet 111 and the second flow passage inlet 31, so as to lubricate the bearing 2.

In this embodiment, the length of the first flow passage inlet 111 in the axial direction is smaller than the length of the bearing mounting portion 11 in the axial direction. Likewise, the length of the second flow path inlet 31 in the axial direction is smaller than the length of the sleeve 3 in the axial direction. That is, when viewed in the radial direction, the two inlets are "匚" shaped, and the open ends thereof are respectively provided at the bearing mounting portion 11 and the side of the sleeve 3 away from the housing side wall 13 of the motor housing 1, so that it is possible to process by a processing tool such as a milling cutter, etc., entering the inside of the motor housing 1 in the axial direction of the motor housing 1 during processing, avoiding the need to disassemble the motor housing 1 for processing the oil flow passage.

After the motor is in place, the oil outlet passage 121 is preferably located lowermost. This is provided to facilitate the convergence of oil under the force of gravity to the oil outlet passage 121. A straight line passing through the first flow path inlet 111 and/or the second flow path inlet 31 and intersecting the axis may coincide with the direction of gravity, i.e. the straight line also passes through the oil outlet passage 121, as seen in the axial direction. The straight line may not coincide with the direction of gravity, but may form a certain angle with the direction of gravity. The acute angle formed by the straight line and the direction of gravity may be an angle of not more than 45 ° or not more than 30 °.

Referring to fig. 6, depending on the operating conditions, oil may flow from the injection passage 41 at different speeds. In order to enhance the lubrication effect, referring to fig. 1, the motor housing is further provided with a bead 5 for guiding the oil flowing out of the oil injection flow passage 41 to the first flow passage inlet 111, the bead 5 extending in the radial direction between the housing peripheral wall 12 and the bearing mounting portion 11 from the housing side wall 13 in the axial direction and not exceeding the bearing mounting portion 11.

Thus, the oil that has entered the inner chamber of the motor housing 1 through the oil injection passage 41 can flow into the first passage inlet 111 by the action of the oil deflector 5. That is, by providing the oil deflector 5, an oil collecting chamber can be formed such that oil flowing out from the oil injection flow passage 41 is accumulated in the oil collecting chamber, flows into the first flow passage inlet 111 and the second flow passage inlet 31 by gravity, and then lubricates the bearing, thereby enabling better lubrication of the bearing. When the straight line passing through the first and/or second flow path inlets 111, 31 and intersecting the axis forms an angle with the gravitational direction exceeding a certain angle, for example 5 °, or 8 °, as seen in the axial direction, a oil deflector may be provided only on one side of the first and/or second flow path inlets 111, 31, as oil may fall on the oil deflector under the influence of gravity. If the included angle is smaller than a certain angle, for example, 5 degrees or 8 degrees, an oil blocking rib can be respectively arranged on two sides of the oil injection flow passage 41, so that the oil can be conveniently gathered. The side of the oil deflector 5 remote from the housing side wall 13 can be as flush as possible with the end of the bearing mount 11 remote from the housing side wall 13.

According to an exemplary embodiment of the bearing mounting portion 11 and the sleeve 3, as shown in fig. 1 and 3, a first flow passage outlet 112 is provided at a position of the lower half of the bearing mounting portion 11. The first flow channel inlet 111 and the first flow channel outlet 112 may be positioned on the same line or may not be positioned on the same line. Likewise, a second flow passage outlet 32 is provided at a position of the lower half of the sleeve 3. The second flow inlet 31 and the second flow outlet 32 may be positioned on the same line or different from the same line. The second flow channel outlet 32 corresponds to the first flow channel outlet 112, and the first flow channel outlet 112 and the second flow channel outlet 32 are opposite to each other, or the first flow channel outlet 112 and the second flow channel outlet 32 are staggered at a certain angle but not completely staggered, so that oil can flow through the first flow channel outlet 112 and the second flow channel outlet 32 in sequence and then flow into the bottom of the inner cavity of the motor shell 1. Preferably, the first flow passage outlet 112 and the second flow passage outlet 32 are not located at the lowest positions of the bearing mounting portion 11 and the sleeve 3, but are located at a distance from the lowest positions, so that the oil can remain in part at the bottom of the bearing 2 to continue to perform lubrication.

In a further embodiment of the sleeve 3, as shown in fig. 2 and 4, the sleeve 3 includes a sleeve peripheral wall 33 and a sleeve side wall 34 connected to one side of the sleeve peripheral wall 33. The sleeve peripheral wall 33 is cylindrical, and the sleeve side wall 34 extends radially inward from one side of the sleeve peripheral wall 33, so that one side of the bearing 2 can be restrained.

With further reference to fig. 5 and 6, the sleeve peripheral wall 33 extends toward the sleeve side wall 34 and is provided with a sleeve oil inlet passage 35 and a sleeve oil outlet passage 36. The sleeve oil feed passage 35 is formed in the sleeve peripheral wall 33 and the sleeve side wall 34 and serves to communicate one side of the bearing 2 near the sleeve side wall 34 with the second passage inlet 31, so that a part of the oil can enter the bearing 2 along the sleeve oil feed passage 35 from one end of the bearing 2 near the sleeve side wall 34 after entering the second passage inlet 31. The sleeve oil outlet flow passage 36 is formed in the sleeve peripheral wall 33 and the sleeve side wall 34, and is used for communicating one side of the bearing 2 near the sleeve side wall 34 with the second flow passage outlet 32, so that a part of the oil having a lubrication effect can flow out from one end of the bearing 2 near the sleeve side wall 34 via the sleeve oil outlet flow passage 36 and the second flow passage outlet 32.

In order to limit the relative positions of the bearing 2 and the sleeve 3 in the axial direction, a collar 6 is also provided on the side of the bearing 2 remote from the sleeve sidewall 34, with reference to fig. 1 and 2, the outer periphery of the collar 6 being fitted into a groove provided on the sleeve peripheral wall 33 of the sleeve 3.

With continued reference to fig. 1 and 2, the bearing mounting portion 11 is provided with a plurality of first half holes 113 circumferentially equally spaced therealong and the sleeve 3 is provided with a plurality of second half holes 331 circumferentially equally spaced therealong. The first half hole 113 and the second half hole 331 together form a hole for mounting the fixing member, and by inserting the fixing member 7 into the hole, the sleeve 3 and the bearing mounting portion 11 can be prevented from being relatively rotated in the circumferential direction. Furthermore, the fastening element 7 can also play a certain stopping role in the axial direction. As an alternative, the sleeve 3 can also be integrally formed on the motor housing in a cast manner.

As shown in fig. 4, the housing peripheral wall 12 is provided with a housing outlet 122 at a position corresponding to the lower position of the second flow passage outlet 32, and the inner chamber of the motor housing 1 is communicated with the oil outlet passage 121 through the housing outlet 122. The housing outlet 122 may be disposed at the bottom of the housing peripheral wall 12 of the motor housing 1 in the gravity direction, and the oil may enter the housing outlet 122 after flowing out of the second flow path outlet 32, and be discharged through the oil outlet passage 121 by the oil pump, so that the oil may flow in the circulation loop.

According to a specific exemplary embodiment of the oil guide 4, as shown in fig. 2 and 6, the oil guide 4 may include an annular body 42 and a protrusion 43 extending axially along the body 42. The body 42 is disposed coaxially with the housing peripheral wall 12 and connected to the housing peripheral wall 12, and in some specific embodiments, a plurality of through holes may be disposed at equal intervals in the circumferential direction of the oil ring 42, and the through holes may be penetrated by bolts and then abutted against the housing peripheral wall 12 for fixation. The projection 43 is provided on the upper half of the body 42 and extends from the body 42 toward the side close to the housing side wall 13. The oil injection flow passage 41 extends from the outer peripheral wall of the oil ring 42 to a side wall of the bulge portion 43 near the side wall 13 of the housing, so as to flow toward the inlet of the oil injection flow passage 41 along the oil flow passage on the stator after the oil flows out of the outlet of the oil feed passage 123.

On the basis of a liquid cooling motor, the utility model changes a supporting bearing of a motor rotor from a closed bearing to an open bearing. On the basis, compared with the thought that oil is guided to the rotor bearing by using an oil guide pipe and/or an oil guide oil way, the utility model adopts the solution that the oil inlet and outlet oil way is processed on the bearing mounting part, the oil is led out from the cooling oil way, and lubrication of the bearing is realized by utilizing the action of gravity, the oil guide pipe with complex design, manufacture and installation is not needed, and the mould cost caused by manufacturing the detachable motor shell is avoided, thereby reducing the processing cost, reducing the processing content and improving the production efficiency.

The motor of the present utility model may be applied to various types of electrically driven vehicles. For example, it may be applied to a pure electric vehicle that is supplied with electric power only from a battery, and it may also be applied to a hybrid vehicle provided with a power source of other types than an electric motor, such as a fossil fuel engine, a hydrogen engine, or the like.

The structure of the present utility model has been described in detail above. Those skilled in the art will recognize that many of the details described are exemplary only and not limiting. That is, it is only necessary to achieve the corresponding functions, and it is not necessary to employ the specific shape, structure, and the like described above.

While the present utility model has been described with respect to the above exemplary embodiments, it will be apparent to those skilled in the art that various other embodiments can be devised by modifying the disclosed embodiments without departing from the spirit and scope of the utility model. Such embodiments should be understood to fall within the scope of the utility model as determined based on the claims and any equivalents thereof.

Claims (10)

1. An electric machine comprising a stator, a rotor and a machine housing, wherein the machine housing comprises:

a housing peripheral wall that is annular and defines an axis;

the casing lateral wall, the casing lateral wall is located in the axis direction the one end of casing perisporium, be provided with on the casing lateral wall:

The bearing installation part is used for installing a bearing, the bearing is used for supporting the rotor, and the bearing installation part is provided with a first runner inlet and a first runner outlet;

The oil blocking rib is located between the peripheral wall of the shell and the bearing mounting part in the radial direction and extends towards the stator along the axial direction, and the oil blocking rib is arranged so that oil enters the first flow passage inlet under the action of gravity.

2. An electric machine according to claim 1, characterized in that,

The side wall of the shell is also provided with a shaft sleeve, and the shaft sleeve is arranged between the bearing mounting part and the bearing.

3. An electric machine according to claim 2, characterized in that,

The shaft sleeve is provided with a second flow passage inlet and a second flow passage outlet, the second flow passage inlet and the first flow passage inlet are arranged at least partially in superposition in the radial direction, and the second flow passage outlet and the first flow passage outlet are arranged at least partially in superposition in the radial direction.

4. The motor of claim 3, wherein the motor is configured to control the motor,

The shaft sleeve comprises an annular shaft sleeve peripheral wall and a shaft sleeve side wall positioned on one side of the shaft sleeve peripheral wall, a shaft sleeve oil inlet flow passage and a shaft sleeve oil outlet flow passage are arranged in the shaft sleeve peripheral wall and the shaft sleeve side wall, the shaft sleeve oil inlet flow passage is in fluid communication with the second flow passage inlet, and the shaft sleeve oil outlet flow passage is in fluid communication with the second flow passage outlet.

5. An electric machine according to any one of claims 1-4, characterized in that,

In the use state of the motor, a straight line passing through the first flow passage inlet and intersecting the axis is not coincident with the gravity direction when viewed in the axis direction.

6. The motor of claim 5, wherein the motor is configured to control the motor,

The number of the oil blocking ribs is one, and the included angle between the oil blocking ribs and the horizontal direction is smaller than the included angle between the straight line and the horizontal direction.

7. An electric machine according to any one of claims 1-4, characterized in that,

When the motor is in a use state, the straight line passing through the first flow passage inlet and intersecting with the axis coincides with the gravity direction, the number of the oil blocking ribs is two, and the first flow passage inlet is positioned between the two oil blocking ribs in the circumferential direction.

8. An electric machine according to any one of claims 1-3, characterized in that,

In the use state of the motor, a straight line passing through the first flow passage outlet and intersecting the axis is not coincident with the gravity direction when viewed along the axis direction.

9. An electric machine according to any one of claims 1-3, characterized in that,

An oil feed passage and an oil discharge passage are formed in the peripheral wall of the housing.

10. The motor of claim 9, wherein the motor is configured to control the motor to drive the motor,

The device also comprises an oil guiding device, wherein the oil guiding device is provided with an oil injection flow passage, and the oil injection flow passage is in fluid communication with the oil delivery passage through an oil way on the stator.