WO2018121726A1 - Motor housing and motor - Google Patents

Abstract

A motor housing, comprising a body (220) and an end cover (210). The body (220) comprises: a flange (221), provided at one end of the body (220) and having a plurality of bolt holes (221a); a rear end face (223), located at the other end of the body (220); a side face (222), extending between the flange (221) and the rear end face (223), with a stepped opening (221b) being provided on the inner periphery of the side face (222) close to the flange (221) and a plurality of heat dissipation fins (222a) being provided on the outer surface of the side face (222); a cavity (220a), surrounded by the side face (222) and the rear end face (223), the inner diameter of the stepped opening (221b) being greater than the inner diameter of the cavity (220a). The end cover (210) comprises: an installation portion (212), configured to fit into the stepped opening (221b) and being provided with a groove (212a) on the periphery thereof; and a seal ring (250), mounted in the groove (212a) and matching with the stepped opening (221b) so as to seal the cavity (220a). The invention also relates to a motor comprising said motor housing. The motor housing is simple in structure, easy to manufacture, and convenient to install, and can reduce motor manufacturing processes, reduce manufacturing costs and improve reliability while providing good heat dissipation performance to the motor.

Description

Motor housing and motor Technical field

This invention relates to motor mechanical structures and, more particularly, to a motor housing having an integral heat dissipation structure. The invention also relates to a motor comprising the above described motor housing.

Background technique

It is known that motors on vehicles such as motorcycles and scooters often have the configuration shown in FIG. Wherein, the motor 100 includes an end cap 110 and a body 120. The body 120 is typically attached to the end cap 110 by a plurality of bolts 140. A stator and a rotor (not shown) of the motor are disposed within the body 120, and the rotating shaft 130 is supported on the end cap 110. Further, a plurality of electrodes 111 are provided on the side of the end cap 110.

FIG. 2 shows a cross-sectional structure of the body 120. Wherein, the main body 120 includes a flange 121 disposed at one end of the main body 120 and having a plurality of bolt holes 121a; a rear end surface 123 located at the other end of the main body 120; a side surface 122 at the flange 121 and The rear end faces 123 extend between and have a relatively smooth outer surface; and a cavity 120a formed by the side faces 122 and the rear end faces 123 for receiving the stator and the rotor.

However, in the existing motor design, the main body 120 is usually made of cast iron, and in order to ensure the heat dissipation performance of the motor, it is also necessary to install an aluminum heat sink outside the main body 120. The heat sink usually has an annular structure or is composed of two or more arcuate halves, and the outer circumference of the heat sink has a protruding annular structure to facilitate heat dissipation of the motor. The heat sink typically needs to be secured to the body 120, such as by a plurality of bolts 140, and attached to the body structure or other structure. During this process, scratches may occur between the heat sink and the sides, and additional fixing operations increase manufacturing costs. In addition, the bolts pose a risk of loosening.

Accordingly, it is desirable to provide a motor housing and an electric machine including the same that solves at least one of the above problems.

Summary of the invention

It is an object of the present invention to provide a motor housing with an integrally formed heat dissipation structure. Another object of the present invention is to provide a motor including the above motor housing.

The object of the present invention is achieved by the following technical solutions:

A motor housing includes:

The subject, which includes:

a flange disposed at one end of the body and having a plurality of bolt holes;

a rear end face located at the other end of the body;

a side surface extending between the flange and the rear end surface, wherein the stepped opening is disposed at an inner circumference of the side surface near the flange, and the plurality of heat dissipation fins are disposed on the outer surface of the side surface;

a cavity formed by the side surface and the rear end surface, wherein the inner diameter of the stepped opening is larger than the inner diameter of the cavity;

End caps, which include:

a mounting portion configured to fit into the stepped opening and having a groove provided on a periphery thereof;

A seal ring is mounted in the recess and cooperates with the stepped opening to seal the cavity.

Optionally, the inner diameter of the stepped opening is greater than the outer diameter of the side.

Optionally, the stepped opening is disposed on one of the plurality of heat dissipation fins.

Optionally, the outer surface of the side surface is provided with a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged in parallel with each other and cover at least a portion of the outer surface of the side surface.

Optionally, the plurality of annular projections are configured to extend perpendicular to the outer surface of the side.

Optionally, the body is configured to be made by casting.

A motor comprising:

The above motor housing;

a stator and a rotor, which are disposed within the cavity;

The rotating shaft has one end supported on the end cover and the other end supported on the rear end surface, wherein the rotor is mounted on the rotating shaft.

Optionally, a bearing housing for supporting the rotating shaft is disposed on the rear end surface.

Optionally, the bearing housing is configured to protrude into the interior of the cavity.

Optionally, the rear end face and the side face are configured to be integrally formed.

The motor housing of the present invention has the advantages of simple structure, easy manufacture, convenient installation, and the like, and can reduce the manufacturing process of the motor, reduce the manufacturing cost, and improve the reliability while providing good heat dissipation performance to the motor.

DRAWINGS

The invention will be further described in detail below with reference to the drawings and the preferred embodiments, but those skilled in the art will understand that the drawings are only for the purpose of explaining the preferred embodiments, and therefore should not be Limitations of the scope of the invention. In addition, the drawings are only intended to be illustrative of the composition or construction of the described objects and may include exaggerated representations, and the drawings are not necessarily to scale.

1 is a perspective view of a prior art motor.

2 is a partial cross-sectional view of a prior art motor.

Figure 3 is a partial perspective view of one embodiment of the body of the motor housing of the present invention.

Figure 4 is a cross-sectional view of the embodiment of Figure 3.

Figure 5 is a perspective view of one embodiment of an end cap of the present invention.

Figure 6 is a perspective view of one embodiment of a seal ring of the present invention.

Figure 7 is a perspective view of one embodiment of the motor of the present invention.

detailed description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is only illustrative, exemplary, and should not be construed as limiting the scope of the invention.

First, it should be noted that the terms top, bottom, upward, downward, etc. mentioned herein are defined with respect to the directions in the respective drawings, they are relative concepts, and thus can be based on them. It varies in different locations and in different practical states. Therefore, these or other orientation terms should not be construed as limiting terms.

In addition, it should be noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the drawings, can still be Combinations continue between the materials to obtain other embodiments of the invention that are not directly mentioned herein.

It should be noted that in the different drawings, the same reference numerals refer to the same or substantially the same components.

Figure 3 is a partial perspective view of one embodiment of the body of the motor housing of the present invention, and Figure 4 is a cross-sectional view of the embodiment of Figure 3. Wherein, the main body 220 includes a flange 221 disposed at one end of the main body 220 and having a plurality of bolt holes 221a; a rear end surface 223 located at the other end of the main body 220; a side surface 222 at the flange 221 and The rear end faces 223 extend between the outer surfaces of the side faces 222 with a plurality of heat radiating fins 222a, and a cavity 220a formed by the side faces 222 and the rear end faces 223 for accommodating the stator and the rotor.

Wherein, a stepped opening 221b is provided at an inner circumference of the side surface 222 near the flange 221, and wherein the flange 221, the rear end surface 223 and the side surface 222 are configured to be integrally formed.

Optionally, the inner diameter of the stepped opening 221b is greater than the inner diameter of the cavity 220a.

Optionally, the inner diameter of the stepped opening 221b is greater than the outer diameter of the side surface 222.

Optionally, the stepped opening 221b is disposed on one of the plurality of heat dissipation fins 222a

Alternatively, the body 220 may be made of aluminum.

Alternatively, the body 220 can be made by casting.

Alternatively, a bearing seat 223a is formed on the side of the rear end surface 223 facing the cavity 220a for supporting one end of a rotating shaft not shown and its bearing.

Optionally, the flange 221 is provided with six bolt holes 221a.

Optionally, the body 220 has a diameter of approximately 129 mm.

Optionally, the side surface 222 is formed integrally with the heat dissipation fins 222a.

Optionally, the plurality of heat dissipation fins 222a are arranged in parallel with each other and cover at least a portion of the outer surface of the side surface 222. In the illustrated embodiment, the plurality of heat dissipation fins 222a extend from the flange 221 to the rear end surface 223, and the plurality of heat dissipation fins 222a are configured to be substantially perpendicular to the outer surface of the side surface 222.

Figure 5 is a perspective view of one embodiment of an end cap of the present invention. Wherein, the end cover 210 includes a mounting portion 212 configured to fit into the stepped opening 221b and having a groove 212a at the periphery thereof. Wherein, the end cap 210 is attached to the flange 221 by a plurality of first bolts 240.

Figure 6 is a perspective view of one embodiment of a seal ring of the present invention. Wherein, the seal ring 250 is configured to be mounted in the recess 212a and cooperate with the stepped opening 221b to achieve a sealed connection between the stepped opening 221b and the end cap 210.

Figure 7 is a perspective view of one embodiment of the motor of the present invention. Wherein, the motor 200 includes: a main body 220 according to the above; a stator and a rotor (not shown) disposed in the cavity 220a of the main body 220; and a rotating shaft 230 having one end supported on the end cover 210 and the other end Supported on the rear end surface 223, wherein the rotor is mounted on the rotating shaft 230.

Optionally, a plurality of side-by-side electrodes 211 are disposed on a side of the end cap 210.

Alternatively, as shown, the end cap 210 is attached to the flange 221 by two first bolts 240, and the motor 200 is attached to the vehicle structure or other structure by four second bolts 240a.

Optionally, a bearing seat 223a for supporting the rotating shaft 230 is disposed on the rear end surface 223.

Alternatively, the bearing housing 223a is configured to protrude toward the interior of the cavity 220a.

Optionally, the rear end surface 223 and the side surface 222 are configured to be integrally formed.

At the time of installation, the stator, rotor, core, bearings and other motor components of the motor are first placed into the cavity 220a through the opening. The end cap 210 is then attached to the flange 221 with a plurality of bolts 240 and the shaft 230 is extended from the aperture in the end cap 210. In the mounting of the motor of the present invention, the step of fixing the heat sink ring to the motor housing is omitted.

The motor housing and the motor of the invention have an integrated heat dissipation structure, which not only facilitates heat dissipation during operation of the motor, but also requires no additional installation process, thereby reducing cost and improving efficiency. In addition, the integrated heat dissipation structure does not require bolts to secure, reducing the risk of bolts falling out.

Further, by employing the motor casing of the present invention, it is not necessary to separately manufacture the heat radiation ring, thereby reducing the manufacturing process of the motor and reducing the cost.

Alternatively, the motor housing and motor of the present invention may be cooled by air cooling.

The motor housing and the motor of the present invention can be used for electric bicycles, electric vehicles, electric skating vehicles, etc., and can also be applied to other products.

The present invention is disclosed with reference to the drawings, and also to enable those skilled in the art to practice the invention, including making and using any device or system, selecting suitable materials, and using any combination. The scope of the invention is defined by the claimed embodiments and includes other examples that are apparent to those skilled in the art. Such other examples as long as such other examples include structural elements that are not different from the technical language of the claimed technical solution, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solution. It should be considered within the scope of protection as determined by the technical solution claimed by the present invention.

Claims (10)

A motor housing, characterized in that it comprises: a body (220) comprising: a flange (221) disposed at one end of the body (220) and having a plurality of bolt holes (221a); a rear end surface (223) located at the other end of the body (220); a side surface (222) extending between the flange (221) and the rear end surface (223), wherein a stepped opening (221b) is disposed at an inner circumference of the side surface (222) adjacent to the flange (221) And a plurality of heat dissipation fins (222a) are disposed on an outer surface of the side surface (222); a cavity (220a) formed by the side surface (222) and the rear end surface (223), wherein an inner diameter of the stepped opening (221b) is larger than an inner diameter of the cavity (220a); An end cap (210) comprising: a mounting portion (212) configured to fit into the stepped opening (221b) and having a groove (212a) disposed on a periphery thereof; A seal ring (250) is mounted in the recess (212a) and cooperates with the stepped opening (221b) to seal the cavity (220a). The motor housing according to claim 1, wherein an inner diameter of the stepped opening (221b) is larger than an outer diameter of the side surface (222). The motor housing according to claim 2, wherein the stepped opening (221b) is disposed on one of the plurality of heat dissipation fins (222a). The motor housing according to claim 3, wherein the outer surface of the side surface (222) is provided with a plurality of heat dissipation fins (222a), and the plurality of heat dissipation fins (222a) are parallel to each other. Arranged and covering at least a portion of the outer surface of the side surface (222). The motor housing of claim 4 wherein said plurality of annular projections (222a) are configured to extend perpendicular to an outer surface of said side surface (222). A motor housing according to any one of claims 1 to 5, wherein the body is configured to be made by casting. A motor (200), characterized in that it comprises: A motor housing according to any one of claims 1 to 6; a stator and a rotor disposed within the cavity (220a); A rotating shaft (230) has one end supported on the end cover (210) and the other end supported on the rear end surface (223), wherein the rotor is mounted on the rotating shaft (230). The electric machine (200) according to claim 7, characterized in that the rear end surface (223) is provided with a bearing housing (223a) for supporting the rotating shaft (230). The electric machine (200) according to claim 8, wherein the bearing housing (223a) is configured to protrude toward the inside of the cavity (220a). The electric machine (200) according to claim 9, wherein the rear end surface (223) and the side surface (222) are configured to be integrally formed.

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