CN219999171U - Balance plate, motor, automobile driving assembly and automobile - Google Patents

Abstract

The utility model provides a balance plate, a motor, an automobile driving assembly and an automobile, and relates to the technical field of automobile parts. When the balance plate body rotates at a high speed along with the rotor, cooling oil in the rotor core can be thrown to the inner side of the stator coil through the through hole, so that the inner side of the stator coil is cooled, and the motor performance is improved.

Description

Balance plate, motor, automobile driving assembly and automobile

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a balance plate, a motor, an automobile driving assembly and an automobile.

Background

In the running process of the driving motor for the vehicle, the temperature rise of the motor determines the motor performance, so the design of a heat dissipation system is important. The common cooling and heat dissipation modes in the current market are as follows: 1. the air cooling is mainly realized by integrating fans on the inner rotor or taking away the heat of the motor by wind in nature, the cooling effect is limited, and the motor performance is greatly limited. 2. The heat on the casing is taken away to the water-cooling, mainly through the circulation cooling water in the casing, and the heat of stator coil and the heat on the stator core need to transmit to the casing earlier, and propagation path is longer, and the cooling effect is better than the forced air cooling, but the heat dispersion still is still not high, can't cool off the rotor moreover. 3. For cooling of the rotor, cooling oil enters an oil passage inside the rotor core from the inside of the rotating shaft, so that for cooling of the rotor, the cooling oil is usually sprayed on the outer side of the stator coil in an oil-spraying, oil-spraying and shell oil-spraying mode, but the inner side of the stator coil is difficult to quickly cool, and the cooling effect still needs to be enhanced.

Disclosure of Invention

The utility model aims to solve the problem of poor cooling effect when the stator coil is cooled by the existing cooling mode.

In order to solve the problems, the utility model provides a balance plate, which comprises a balance plate body, wherein a through hole is formed in the balance plate body and is used for being communicated with an oil duct in a rotor core, the inner wall of the through hole comprises a first circumferential inner wall and an inclined inner wall which are adjacent, the first circumferential inner wall is parallel to the radial direction of the balance plate body, the inclined inner wall is a side wall of the through hole, which is far away from the central axis of the balance plate body, the two ends of the inclined inner wall in the inclined direction of the inclined inner wall are respectively provided with a radial first end and a radial second end, the radial first end is connected with one end surface of the balance plate body, which is far away from the rotor core, and the distance from the radial second end to the central axis of the balance plate body is smaller than the distance from the radial first end to the central axis of the balance plate body.

Compared with the prior art, the balance plate provided by the utility model has the following technical effects:

the balance plate is characterized in that a through hole is further formed in the balance plate body on the basis of the basic function of the traditional balance plate, the through hole can be communicated with an oil duct in a rotor core, the through hole is provided with a first circumferential inner wall which is radially parallel to the balance plate body, the through hole is further provided with an inclined inner wall which is arranged at an obtuse angle with the outer end face (one end face far away from the rotor core) of the balance plate, particularly, the distance from the radial second end of the inclined inner wall to the central axis of the balance plate body is smaller than the distance from the radial first end to the central axis of the balance plate body, and then a bevel edge is formed between the inclined inner wall and the first circumferential inner wall under the condition that the inclined inner wall is adjacent to the central axis of the balance plate body, and the bevel edge extends towards the direction of the inner side face of a stator coil at the end of the stator core.

Further, an end face, far away from the rotor core, of the balance plate body is a first plate end face, an end face, close to the rotor core, of the balance plate body is a second plate end face, and a transition inner wall is formed between the radial second end and the second plate end face.

Further, the transition inner wall is perpendicular to the radial direction of the balance plate body.

Further, the inner wall of the through hole further comprises a first radial inner wall close to the central axis of the balance plate body, the first radial inner wall is arranged opposite to the transition inner wall, the first radial inner wall is perpendicular to the radial direction of the balance plate body, and the first radial inner wall and the transition inner wall are arc surfaces respectively.

Further, an end face, away from the rotor core, of the balance plate body is a first plate end face, and a concave area is formed in the center of the first plate end face.

Further, the inner wall of the through hole further comprises a second circumferential inner wall adjacent to the inclined inner wall, and the second circumferential inner wall is arranged opposite to the first circumferential inner wall.

Further, a plurality of through holes are formed, and the through holes are arranged on the balance plate body in an annular array.

The utility model also provides a motor comprising the balance plate.

Since technical improvements and technical effects of the motor are the same as those of the balance plate, a description of the motor will not be repeated.

The utility model also provides an automobile driving assembly comprising the motor.

Because the technical improvement and the technical effect of the automobile driving assembly are the same as those of the motor, the automobile driving assembly is not repeated.

The utility model also provides an automobile comprising the automobile driving assembly.

Since technical improvements and technical effects of the automobile are the same as those of the automobile driving assembly, a detailed description of the automobile is omitted.

Drawings

FIG. 1 is a schematic structural view of a balance plate according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a balance plate and stator assembly according to an embodiment of the present utility model;

fig. 3 is an enlarged view at a in fig. 2.

Reference numerals illustrate:

1. a balance plate body; 11. a through hole; 111. a first circumferential inner wall; 112. a second circumferential inner wall; 113. an inclined inner wall; 114. a transitional inner wall; 115. a first radially inner wall; 116. a beveled edge; 12. a recessed region; 2. a stator core; 3. and a stator coil.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Also, in the drawings, the X-axis indicates the longitudinal direction, that is, the front-rear direction, and the positive direction of the X-axis indicates the front, and the negative direction of the X-axis indicates the rear. It should also be noted that the foregoing X-axis is provided merely for the purpose of describing the present utility model and for simplicity of description, and is not intended to indicate or imply that the devices or elements referred to must be in a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Referring to fig. 1-3, a balance plate according to an embodiment of the present utility model includes a balance plate body 1, a through hole 11 is provided on the balance plate body 1, the through hole 11 is configured to communicate with an oil duct inside a rotor core (not shown in the drawing, and may be considered as being located inside a stator core 2 in fig. 2), an inner wall of the through hole 11 includes a first circumferential inner wall 111 and an inclined inner wall 113 adjacent to each other, the first circumferential inner wall 111 is parallel to a radial direction of the balance plate body 1, the inclined inner wall 113 is a side wall of the through hole 11 away from a central axis of the balance plate body 1, two ends of the inclined inner wall 113 in an inclined direction thereof are respectively provided with a radial first end and a radial second end, and a distance from the radial first end to the central axis of the balance plate body 1 is smaller than a distance from the radial first end to the central axis of the balance plate body 1.

After the motor is assembled, as shown in fig. 2, the balance plate body 1 is located inside the stator coil, and the balance plate body 1 does not extend beyond the longitudinally outermost end of the stator coil in the longitudinal direction.

In this embodiment, the balance plate body 1 is further provided with a through hole 11 on the basis of having the basic function of the conventional balance plate, the through hole 11 can be communicated with the oil channel in the rotor core, and the through hole 11 is provided with a first circumferential inner wall 111 perpendicular to the circumferential direction of the balance plate body 1 (that is, the first circumferential inner wall 111 is parallel to the radial direction of the balance plate body 1), and an inclined inner wall 113 arranged at an obtuse angle with the outer end surface (one end surface far away from the rotor core) of the balance plate, specifically, the distance from the radial second end of the inclined inner wall 113 to the central axis of the balance plate body 1 is smaller than the distance from the radial first end to the central axis of the balance plate body 1, then a bevel 116 can be formed between the inclined inner wall 113 and the first circumferential inner wall 111 under the condition that the inclined inner wall 113 is adjacent to the central axis of the balance plate body 1, and the bevel 116 extends towards the inner side of the stator coil 3 at the end of the stator core 2.

In addition, since the through hole 11 is formed in the balance plate body 1, the weight of the balance plate body 1 can be reduced, and the lightweight design of the electric automobile can be attached.

In this embodiment, through a lot of experiments, when the first circumferential inner wall 111 is parallel to the axial direction of the balance plate body 1, the oil throwing effect is best, and of course, the first circumferential inner wall 111 may also be disposed at a small angle with the axial direction of the balance plate body 1, and the oil throwing effect is hardly affected. From the viewpoint of ease of processing, the first circumferential inner wall 111 is preferably radially parallel to the balance plate body 1.

It will be appreciated that the through holes 11 should be located close to the edge of the balance plate body 1, so that it is closer to the stator coil 3, and it is easier to throw cooling oil through the through holes 11 to the inner side of the stator coil 3.

Referring to fig. 1, optionally, the inner wall of the through hole 11 further includes a second circumferential inner wall 112 adjacent to the inclined inner wall 113, and the second circumferential inner wall 112 is disposed opposite to the first circumferential inner wall 111.

In this embodiment, two circumferential inner walls are provided, one is the first circumferential inner wall 111, and the other is the second circumferential inner wall 112 in this embodiment, the second circumferential inner wall 112 is opposite to the first circumferential inner wall, and accordingly, a bevel is formed between the second circumferential inner wall 112 and the inclined inner wall 113. When the balance plate body 1 rotates clockwise with the rotor, the cooling oil is thrown out along the inclined edge 116 between the first circumferential inner wall 111 and the inclined inner wall 113, and when the balance plate body 1 rotates counterclockwise with the rotor, the cooling oil is thrown out along the inclined edge between the second circumferential inner wall 112 and the inclined inner wall 113.

Referring to fig. 1 and 3, alternatively, an end surface of the balance plate body 1 away from the rotor core is a first plate end surface, an end surface of the balance plate body 1 close to the rotor core is a second plate end surface, a transition inner wall 114 is formed between an end of the inclined inner wall 113 away from the first plate end surface and the second plate end surface, that is, a transition inner wall 114 is formed between a radial second end of the inclined inner wall 113 and the second plate end surface.

Wherein, a terminal surface that balance plate body 1 kept away from rotor core is first board terminal surface, is the preceding terminal surface of balance plate body 1 promptly, and a terminal surface that balance plate body 1 is close to rotor core is the second board terminal surface, is the rear end face promptly.

In this embodiment, the end of the inclined inner wall 113 far away from the first plate end surface does not extend to the second plate end surface, but is connected with the second plate end surface through the transition inner wall 114, so that smooth transition of cooling oil from the oil passage of the rotor core into the through hole 11 can be ensured, and, because the balance plate body 1 is an aluminum plate, the arrangement of the transition inner wall 114 can also prevent the structural strength of the balance plate body 1 at the inclined inner wall 113 from being too weak.

Optionally, the transition inner wall 114 is perpendicular to the radial direction of the balance plate body 1.

In this embodiment, the transition inner wall 114 may be an arc surface perpendicular to the radial direction of the balance plate body 1, which is convenient for processing and shaping, and the included angle between the transition inner wall 114 and the inclined wall is an obtuse angle, rather than an acute angle with weaker strength, and the included angle between the transition inner wall 114 and the second plate end face is a right angle, rather than an acute angle with weaker strength. If the transition inner wall 114 is an arc surface perpendicular to the radial direction of the balance plate body 1, the cooling oil not only conveniently enters the through hole 11 from the oil passage of the rotor core, but also conveniently transits to the inclined edge 116 along the straight edge between the transition inner wall 114 and the first circumferential inner wall 111 or the second circumferential inner wall 112, and finally is thrown out to the inner side of the stator coil along the inclined edge 116.

Referring to fig. 1, optionally, the inner wall of the through hole 11 further includes a first radial inner wall 115 near the center of the balance plate body 1, where the first radial inner wall 115 is opposite to the transition inner wall 114, and the first radial inner wall 115 is perpendicular to the radial direction of the balance plate body 1.

In this embodiment, the optimum shape of the through hole 11 is a fan-shaped hole, that is, the first circumferential inner wall 111 and the second circumferential inner wall 112 are respectively perpendicular to the circumferential direction of the balance plate body 1, the transition inner wall 114 (may also be referred to as a second radial inner wall) is an arc surface perpendicular to the radial direction of the balance plate body 1, and the first radial inner wall 115 is also an arc surface perpendicular to the radial direction of the balance plate, so that the through hole 11 in the fan-shaped hole shape can be formed by one-step processing, and can ensure excellent oil throwing effect.

Referring to fig. 1, alternatively, an end surface of the balance plate body 1 away from the rotor core is a first plate end surface, and a concave region 12 is disposed in the center of the first plate end surface.

In this embodiment, the weight of the balance plate can be reduced by arranging the concave region 12, and secondly, the concave region 12 and the through hole 11 can be integrally formed along the negative direction of the X axis.

Note that, the edge of the recess 12 may have a region overlapping the through hole 11 (fig. 1 shows a region overlapping the through hole 11), or may have no region overlapping the through hole 11.

Referring to fig. 1 and 2, optionally, a plurality of through holes 11 are provided, and a plurality of through holes 11 are arranged in an annular array on the balance plate body 1.

In this embodiment, by arranging a plurality of through holes 11, the cooling efficiency of the inner side of the stator coil 3 can be improved, each through hole 11 can be a fan-shaped hole, all the first radial inner walls 115 serving as arc surfaces are all on a circle, and all the transitional inner walls 114 serving as arc surfaces are also on a circle, so that all the through holes 11 can be formed simultaneously at one time.

A motor according to another embodiment of the present utility model includes a balance plate as described above.

Since technical improvements and technical effects of the motor are the same as those of the balance plate, a description of the motor will not be repeated.

A further embodiment of the present utility model is an automotive drive assembly comprising an electric motor as described above.

Because the technical improvement and the technical effect of the automobile driving assembly are the same as those of the motor, the automobile driving assembly is not repeated.

An automobile in accordance with yet another embodiment of the present utility model includes an automobile drive assembly as previously described.

Since technical improvements and technical effects of the automobile are the same as those of the automobile driving assembly, a detailed description of the automobile is omitted.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include at least one such feature.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a balance plate, its characterized in that, includes balance plate body (1), be provided with through-hole (11) on balance plate body (1), through-hole (11) are used for with the inside oil duct intercommunication of rotor core, the inner wall of through-hole (11) includes adjacent first circumference inner wall (111) and slope inner wall (113), first circumference inner wall (111) are on a parallel with the radial setting of balance plate body (1), slope inner wall (113) are for through-hole (11) are kept away from a lateral wall of balance plate body (1) axis, slope inner wall (113) have radial first end and radial second end respectively at its incline direction's both ends, radial first end with balance plate body (1) are kept away from one end face of rotor core meets, radial second end to the distance of balance plate body (1) axis is less than radial first end to the distance of balance plate body (1) axis.

2. The balancing plate according to claim 1, characterized in that an end face of the balancing plate body (1) facing away from the rotor core is a first plate end face, an end face of the balancing plate body (1) facing towards the rotor core is a second plate end face, wherein a transitional inner wall (114) is formed between the radial second end and the second plate end face.

3. Balance plate according to claim 2, characterized in that the transition inner wall (114) is perpendicular to the radial direction of the balance plate body (1).

4. A balance plate according to claim 3, characterized in that the inner wall of the through hole (11) further comprises a first radial inner wall (115) close to the central axis of the balance plate body (1), said first radial inner wall (115) being arranged opposite to the transition inner wall (114).

5. Balance plate according to claim 1, characterized in that the balance plate body (1) is provided with a recess (12) in the centre of an end face remote from the rotor core.

6. Balance plate according to claim 1, characterized in that the inner wall of the through hole (11) further comprises a second circumferential inner wall (112) adjacent to the inclined inner wall (113), and in that the second circumferential inner wall (112) is arranged opposite to the first circumferential inner wall (111).

7. Balance plate according to claim 1, characterized in that a plurality of through holes (11) are provided, a plurality of said through holes (11) being arranged in an annular array on the balance plate body (1).

8. An electric machine comprising a balancing plate according to any one of claims 1-7.

9. An automotive drive assembly comprising the electric machine of claim 8.

10. An automobile comprising the automobile drive assembly of claim 9.