CN214755847U

CN214755847U - Motor, electric automobile and motor end cover

Info

Publication number: CN214755847U
Application number: CN202121237029.3U
Authority: CN
Inventors: 孔庆波
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-11-16
Anticipated expiration: 2031-06-02

Abstract

The utility model discloses a motor, electric automobile and motor end cover, this motor include the casing, and the inside cavity vacuole formation of casing is equipped with the holding tank on the inside wall of casing, and holding tank and cavity intercommunication are equipped with the breather valve on the casing, and the part of breather valve exposes outside the casing, and the part stretches into in the holding tank, is used for setting up the piece that absorbs moisture in the holding tank. In the motor, the electric automobile and the motor end cover provided by the embodiment of the utility model, because the moisture absorption part can be arranged in the holding tank, when the motor is heated, the pressure in the cavity is increased, the internal air pressure of the motor can be reduced, and when the motor is cooled, the moisture can be absorbed by the moisture absorption part outside the motor, and the moisture can be intercepted in the holding tank and the moisture absorption part, so that the moisture in the motor can be greatly reduced, the generation of condensation can be reduced, and the motor insulation can be damaged due to the accumulation of liquid water in the motor; meanwhile, the wet air is prevented from directly entering the motor through the gap after passing through the ventilation valve, and the moisture absorption effect is prevented from being influenced.

Description

Motor, electric automobile and motor end cover

Technical Field

The utility model relates to a motor technical field especially relates to a motor, electric automobile and motor end cover.

Background

When the automobile driving motor operates, the air pressure in the cavity of the driving motor can rise along with the rise of the temperature, so that the air tightness of the motor fails, the protection level of the motor is influenced, and the motor breaks down after long-term operation. In order to solve the problem, a ventilation valve device is usually added on the periphery of a heating motor part, so that the problem of temperature rise inside a cavity caused by high temperature is solved, and the air tightness and the service life of the motor are effectively improved. However, because the vent valve has two-way air permeability, when the motor is relatively cold in the cooling process and at night (particularly obvious in a high-humidity environment), condensation can be formed inside the motor cavity, and the condensation can be gradually increased after long-term storage, so that liquid water is in the motor cavity, the insulation performance of the motor is damaged, the service life of the motor is shortened or short circuit is burnt, the consequence is very serious, and the phenomenon is more obvious along with the increase of the power torque of the driving motor of the electric automobile.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor, electric automobile and motor end cover can reduce the inside atmospheric pressure of motor in good time, and can reduce the production of the inside condensation problem of motor to strengthen the motor life-span, reduce the motor insulation problem.

The utility model provides a motor, which comprises a housin, the inside cavity vacuole formation of casing, be equipped with the holding tank on the inside wall of casing, the holding tank with the cavity intercommunication, be equipped with the breather valve on the casing, the part of breather valve expose in the casing is outside, and the part stretches into in the holding tank, be used for setting up the piece that absorbs moisture in the holding tank.

In one embodiment, the moisture absorbing member covers one end of the ventilation valve.

In one embodiment, a box-shaped protrusion is formed on the inner side wall of the shell towards the cavity, and the box-shaped protrusion is hollow to form the accommodating groove;

wherein an opening is formed at the top of the box-shaped protrusion, and the opening communicates the cavity with the accommodating groove; or, a plurality of small holes are formed in the box-shaped bulges and communicate the accommodating groove with the cavity.

In one embodiment, when the box-shaped protrusion is provided with the opening, the vent valve extends into the accommodating groove from a side of the box-shaped protrusion adjacent to the side provided with the opening.

In one embodiment, when the box-shaped protrusion is provided with the opening, the opening is formed at the top of the box-shaped protrusion.

In one embodiment, the box-shaped protrusion includes a bottom wall, a side wall and a top wall, the bottom wall is formed by extending from the inner side wall of the housing toward the cavity, the side wall is connected to the bottom wall, the top wall is connected to the side wall, and the bottom wall, the side wall, the top wall and the inner side wall of the housing are enclosed into the accommodating groove.

In one embodiment, the box-shaped protrusion is integrally formed with the housing; or the box-shaped bulge is connected to the inner side wall of the shell through a connecting structure.

In one embodiment, a mounting hole is formed in the side wall of the shell, and the outer wall of the ventilation valve is matched with the inner side wall of the mounting hole of the shell.

The utility model also provides an electric automobile, including above-mentioned motor.

The utility model also provides a motor end cover, including first side and with the second side that first side is back to back, motor end cover first side is formed with the holding tank, still be equipped with the breather valve on the motor end cover, the part of breather valve expose in the motor end cover the second side, and part stretch into in the holding tank, the holding tank is used for setting up the piece that absorbs moisture.

In the motor, the electric automobile and the motor end cover provided by the embodiment of the utility model, as the moisture absorption part is arranged in the containing groove, when the motor is heated, the pressure in the cavity is increased, the temperature is increased, the moisture in the moisture absorption part is heated, the moisture in the moisture absorption part is evaporated and is discharged to the outside of the motor through the ventilation valve, and the air pressure in the motor is reduced; when the motor is cooled, external wet air enters the motor through the ventilation valve, and the moisture absorption part absorbs water vapor and intercepts the water vapor in the accommodating groove and the moisture absorption part, so that the moisture in the motor is greatly reduced, and the generation of condensation is reduced, so that the phenomenon that liquid water is accumulated in the motor to damage the motor insulation is avoided; simultaneously, because the breather valve part stretches into in the holding tank, can make the one end cladding of breather valve of the piece that absorbs moisture in the holding tank, like this, the humid air that gets into from the external world must be in proper order through breather valve and the piece that absorbs moisture, and steam can be held back completely in holding tank and the piece that absorbs moisture, avoids humid air to directly get into in the cavity through the gap behind the breather valve, influences the moisture absorption effect.

Drawings

Fig. 1 is a schematic cross-sectional view of a motor according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a motor according to another embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a motor according to another embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a motor end cover according to an embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional view of a motor according to an embodiment of the present invention. In the present embodiment, the motor includes a housing 10 and a motor main body 20, the housing 10 is hollow to form a cavity 102, and the motor main body 20 is disposed in the cavity 102. The motor body 20 can be rotated in the cavity 102 when energized to drive other components, such as an axle of an electric vehicle, to rotate. Specifically, the motor main body 20 may include a main shaft 202 extending outside the housing 10 to connect the main shaft 202 to other components to output power. A receiving groove 104 is formed on an inner side wall of the housing 10, and the receiving groove 104 communicates with the cavity 102. The casing 10 is provided with the vent valve 30, and a part of the vent valve 30 is exposed outside the casing 10 and a part of the vent valve extends into the accommodating groove 104. The accommodating groove 104 is provided therein with a moisture absorbing member 40 for absorbing moisture.

In the motor of the embodiment, as the moisture absorption piece is arranged in the accommodating groove of the shell, when the motor is heated, the pressure in the cavity is increased, the temperature is increased, the moisture absorption piece is heated, the moisture in the moisture absorption piece is evaporated and is discharged to the outside of the motor through the ventilation valve, and the air pressure in the motor is reduced; when the motor is cooled (for example, in a shutdown state), external wet air enters the motor through the ventilation valve, and the moisture absorption part absorbs water vapor and intercepts the water vapor in the accommodating groove and the moisture absorption part, so that the moisture in the motor is greatly reduced, and the generation of condensation is reduced, so that the phenomenon that liquid water is accumulated in the motor to damage the motor insulation is avoided; simultaneously, because the breather valve part stretches into in the holding tank, can make the one end cladding of breather valve of the piece that absorbs moisture in the holding tank, like this, the humid air that gets into from the external world must be in proper order through breather valve and the piece that absorbs moisture, and steam can be held back completely in holding tank and the piece that absorbs moisture, avoids humid air to directly get into in the cavity through the gap behind the breather valve, influences the moisture absorption effect.

In this embodiment, a box-shaped protrusion 106 is formed on the inner side wall of the housing 10 toward the cavity 102, the box-shaped protrusion 106 is hollow to form the receiving groove 104, and an opening 108 is formed at the top of the box-shaped protrusion 106, and the opening 108 connects the cavity 102 and the receiving groove 104. Specifically, the opening 108 is a semi-opening, so that the cavity 102 can be communicated with the accommodating groove 104, and the moisture absorbing member 40 can be prevented from falling out of the accommodating groove 104 to some extent. More specifically, the breather valve 30 extends into the receiving groove 104 from a side of the box-shaped protrusion 106 adjacent to the side where the opening 108 is formed, so that the air is required to turn in the receiving groove 104, the path of the air is increased, and the moisture absorption effect is better.

Specifically, the box-shaped protrusion 106 includes a bottom wall 1062, a side wall 1064 and a top wall 1066, the bottom wall 1062 is formed by extending from the inner side wall of the housing 10 toward the cavity 102, the side wall 1064 is connected to the bottom wall 1062, the top wall 1066 is connected to the side wall 1064, and the bottom wall 1062, the side wall 1064, the top wall 1066 and the inner side wall of the housing 10 are enclosed to form the receiving groove 104. Of course, the box-like projection 106 may also have any other shape. In this embodiment, the box-like projection 106 is formed integrally with the housing 10, and thus, a separate container for accommodating the absorbent member 40 is not required, which results in a low manufacturing cost.

It should be understood that referring to fig. 2, in another embodiment, the box-shaped protrusion 106 may also be provided with a plurality of small holes 109, and the small holes 109 communicate the receiving cavity 104 and the cavity 102. The small hole 109 may be opened in either side wall of the box-like projection 106. The size of the apertures 109 can generally be smaller than the size of the particles of the absorbent member 40, and the use of the apertures 109 can further reduce the likelihood that the absorbent member 40 will fall out of the containment tank 104.

In this embodiment, the housing 10 includes a body 11 and a motor end cover 12, wherein one end of the body 11 is open, and the end cover 12 covers the opening of the body 11. The main shaft 202 of the motor main body 20 extends out of the housing 10 from the opposite end of the housing 10 from the end where the motor end cover 12 is provided. Specifically, the breather valve 30 is provided on the motor end cover 12. It is understood that the purge valve 30 may be disposed at other positions of the housing 10 than the motor end cover, and is not limited thereto.

In this embodiment, the air permeable valve 30 may comprise materials with different bidirectional conductivity, so that air permeable and water permeable molecules can be passed from the cavity 102 to the outside of the housing 10, and only gas molecules can be passed from the outside of the housing 10 to the inside of the cavity 102, so as to minimize the liquid water vapor from entering the inside of the motor. Of course, the air-permeable valve 30 may be made of a material that is permeable to air and water molecules in both directions.

In this embodiment, a mounting hole is formed in a side wall of the housing 10, and an outer wall of the breather valve 30 is engaged with an inner side wall of the mounting hole of the housing 10. The vent valve 30 is directly installed on the shell 10, and only one part of the vent valve 30 is matched with the shell 10 when the vent valve 30 is installed, so that excessive gaps caused by multiple parts of matching are avoided.

In the present embodiment, the absorbent member 40 may be a desiccant, but is not limited thereto, as long as the absorbent member 40 is configured to absorb moisture at a low temperature and evaporate the moisture after heating. The desiccant can be chemical desiccant or physical desiccant, the chemical desiccant can be calcium sulfate, calcium chloride, etc., and is dried by combining with water to generate hydrate, and the physical desiccant can be silica gel, active alumina, etc., and is dried by physically adsorbing water. It is understood that the absorbent member 40 may also be a sponge. Typically, the desiccant is in the form of a granular or powder, and therefore requires a container to hold it, in this embodiment by the box-like protrusion 106. The desiccant may be placed in the receiving groove 104 during manufacture of the housing 10 and not removed, i.e., configured in a permanent, non-replaceable configuration, or the desiccant may be placed after manufacture of the housing 10 and subsequently removed, i.e., configured in a replaceable configuration.

In another embodiment, referring to fig. 3, the box-shaped protrusion 106 can be a separate component, which can be connected to the inner sidewall of the housing 10 by a connection structure such as a bolt or a snap. More specifically, the box-like projection 106 may be detachably attached to the housing 10. The box-shaped protrusions 106 are detachably connected to the housing 10, so that the moisture absorbing member 40 can be replaced more conveniently, and the moisture absorbing member 40 can be replaced at a proper time to ensure that the moisture absorbing member 40 has a better using effect.

The utility model also provides an electric automobile, it includes above-mentioned motor.

The utility model provides a motor end cover, please refer to fig. 4, the motor end cover of an embodiment includes first side 122 and the second side 124 that faces away from with first side 122, and the first side 122 of motor end cover is formed with holding tank 104, still is equipped with breather valve 30 on the motor end cover, and the part of breather valve 30 exposes in the second side of motor end cover, and the part stretches into in the holding tank 104. The accommodating groove 104 is provided therein with a moisture absorbing member 40 for absorbing moisture.

In the motor end cover of the embodiment, as the moisture absorption piece is arranged in the accommodating groove, when the motor is heated, the pressure in the cavity is increased, the temperature is increased, the moisture absorption piece is heated, the moisture in the moisture absorption piece is evaporated and is discharged to the outside of the motor through the ventilation valve, and the air pressure in the motor is reduced; when the motor is cooled (for example, in a shutdown state), external wet air enters the motor through the ventilation valve, and the moisture absorption part absorbs water vapor and intercepts the water vapor in the accommodating groove and the moisture absorption part, so that the moisture in the motor is greatly reduced, and the generation of condensation is reduced, so that the phenomenon that liquid water is accumulated in the motor to damage the motor insulation is avoided; simultaneously, because the breather valve part stretches into in the holding tank, can make the one end cladding of breather valve of the piece that absorbs moisture in the holding tank, like this, the humid air that gets into from the external world must be in proper order through breather valve and the piece that absorbs moisture, and steam can be held back completely in holding tank and the piece that absorbs moisture, avoids humid air to directly get into in the cavity through the gap behind the breather valve, influences the moisture absorption effect.

In this embodiment, the first side 122 of the motor end cover forms a box-shaped protrusion 106, the box-shaped protrusion 106 is hollow to form the receiving groove 104, the top of the box-shaped protrusion 106 forms an opening 108, and the opening 108 communicates the outside of the first side 122 with the receiving groove 104. Specifically, the opening 108 is a half-opening, so that the cavity 102 of the housing of the motor can be communicated with the accommodating groove 104, and the moisture absorbing member 40 in the cavity can be prevented from falling out of the accommodating groove 104 to some extent. More specifically, the breather valve 30 extends into the receiving groove 104 from a side of the box-shaped protrusion 106 adjacent to the side where the opening 108 is formed, so that the air is required to turn in the receiving groove 104, the path of the air is increased, and the moisture absorption effect is better.

Specifically, the box-shaped protrusion 106 includes a bottom wall 1062, a side wall 1064 and a top wall 1066, the bottom wall 1062 is formed to extend from the first side 122 of the motor end cover toward the direction away from the second side 124, the side wall 1064 is connected to the bottom wall 1062, the top wall 1066 is connected to the side wall 1064, and the bottom wall 1062, the side wall 1064, the top wall 1066 and the first side 122 of the motor end cover are enclosed to form the receiving slot 104. Of course, the box-like projection 106 may also have any other shape. In this embodiment, the box-like projection 106 is formed integrally with the motor end cap, and therefore, a separate container for accommodating the absorbent member 40 is not required, and the manufacturing cost is low.

It is understood that in another embodiment, the box-shaped protrusion 106 may be provided with a plurality of small holes 109, and the small holes 109 communicate the receiving groove 104 with the first side 122. The small hole 109 may be opened in either side wall of the box-like projection 106. The size of the apertures 109 can generally be smaller than the size of the particles of the absorbent member 40, and the use of the apertures 109 can further reduce the likelihood that the absorbent member 40 will fall out of the containment tank 104.

In this embodiment, a mounting hole is opened on the motor end cover, and the outer wall of the ventilation valve 30 is matched with the inner side wall of the mounting hole of the motor end cover. The vent valve 30 is directly installed on the end cover of the motor, and the installation of the vent valve 30 only needs one part of cooperation between the vent valve 30 and the end cover of the motor, so that excessive gaps caused by cooperation of multiple parts are avoided.

In yet another embodiment, the box-like projection 106 may be a separate component that is attached to the first side 122 of the motor end cap by a bolt or snap-fit connection. More specifically, the box-like projection 106 may be removably attached to the motor end cap. Connect box-like arch 106 detachably in the motor end cover, can make things convenient for the change of moisture-absorbing member 40 more, change moisture-absorbing member 40 in good time can guarantee that moisture-absorbing member 40 has better result of use.

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the above preferred embodiments, but the present invention is not limited to the above embodiments, and any skilled person in the art can make some changes or modifications to equivalent embodiments without departing from the technical scope of the present invention, but all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the technical scope of the present invention.

Claims

1. The motor comprises a shell (10), and is characterized in that a hollow cavity (102) is formed in the shell (10), an accommodating groove (104) is formed in the inner side wall of the shell (10), the accommodating groove (104) is communicated with the hollow cavity (102), a vent valve (30) is arranged on the shell (10), part of the vent valve (30) is exposed out of the shell (10), part of the vent valve extends into the accommodating groove (104), and a moisture absorption piece (40) is arranged in the accommodating groove (104).

2. An electric motor according to claim 1, wherein the moisture absorbing member (40) covers one end of the breather valve (30).

3. The electric motor according to claim 1, characterized in that a box-like projection (106) is provided on the inner side wall of the housing (10) facing the cavity (102), the box-like projection (106) being hollow inside to form the receiving groove (104);

wherein the top of the box-shaped protrusion (106) forms an opening (108), the opening (108) communicating the cavity (102) and the receiving groove (104); or, a plurality of small holes (109) are formed in the box-shaped protrusion (106), and the small holes (109) are used for communicating the accommodating groove (104) with the cavity (102).

4. An electric motor according to claim 3, wherein, when said opening (108) is made in said box-like projection (106), said breather valve (30) protrudes into said housing groove (104) from a side of said box-like projection (106) adjacent to the side where said opening (108) is made.

5. An electric motor according to claim 3, characterized in that the opening (108) opens at the top of the box-like projection (106) when the opening (108) opens at the box-like projection (106).

6. The motor according to claim 3, wherein said box-like projection (106) comprises a bottom wall (1062), a side wall (1064) and a top wall (1066), said bottom wall (1062) being formed by extending from an inner side wall of said housing (10) towards said cavity (102), said side wall (1064) being connected to said bottom wall (1062), said top wall (1066) being connected to said side wall (1064), said bottom wall (1062), said side wall (1064), said top wall (1066) and said inner side wall of said housing (10) enclosing said receiving slot (104).

7. An electric motor according to claim 3, wherein the box-like projection (106) is integrally formed with the housing (10); or the box-shaped bulge (106) is connected to the inner side wall of the shell (10) through a connecting structure.

8. The motor according to claim 1, characterized in that the housing (10) has a mounting hole cut in its side wall, and the outer wall of the breather valve (30) is fitted to the inner side wall of the mounting hole of the housing (10).

9. An electric vehicle comprising the motor according to any one of claims 1 to 8.

10. The motor end cover is characterized by comprising a first side (122) and a second side (124) opposite to the first side (122), wherein a containing groove (104) is formed in the first side (122) of the motor end cover, a vent valve (30) is further arranged on the motor end cover, part of the vent valve (30) is exposed out of the second side (124) of the motor end cover and partially extends into the containing groove (104), and the containing groove (104) is used for arranging a moisture absorption piece (40).