CN217388424U - Oil-cooled motor and automobile - Google Patents

Abstract

The utility model relates to an oil-cooled motor and car, including motor shaft, motor terminal box and motor casing, the motor terminal box switches on with motor casing, motor casing ground connection, the tip of motor shaft stretches into the inside of motor terminal box still includes the conduction portion, the conduction portion is located inside the motor terminal box, just the conduction portion with the tip of motor shaft and the lateral wall of motor terminal box all switch on, the impedance of conduction portion is less than the impedance of the bearing of oil-cooled motor. The utility model discloses a bypass current's scheme can lead to motor casing through the conduction portion with motor shaft electric current because of conduction portion impedance is less than the bearing impedance, avoids the axle current to lead to the fact the damage to the bearing through the bearing. The utility model discloses can effectively solve the motor bearing electroerosion problem, its simple structure, dependable performance, applicable and the cold structure motor of oil.

Description

Oil-cooled motor and automobile

Technical Field

The utility model relates to a new energy automobile technical field, concretely relates to new energy automobile's motor technology.

Background

The new energy automobile is widely popularized, the problem of electric corrosion of a motor bearing begins to be highlighted along with the increase of the use mileage of a motor, current can flow to the bearing through a motor shaft, the electric corrosion of the bearing can gradually form washboard grains on a bearing raceway, the abnormal sound of the bearing is caused, and the service life of the bearing is shortened.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide an oil-cooled motor to solve the problem of easy generation of electric corrosion; the second purpose provides an automobile.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

the utility model provides an oil-cooled motor, includes motor shaft, motor terminal box and motor casing, the motor terminal box switches on with motor casing, motor casing ground connection, the tip of motor shaft stretches into the inside of motor terminal box still includes the portion of switching on, the portion of switching on is located inside the motor terminal box, just the portion of switching on with the tip of motor shaft and the lateral wall of motor terminal box all switch on, the impedance of the portion of switching on is less than the impedance of the bearing of oil-cooled motor.

According to the technical means, because the impedance of the conduction part is smaller than that of the bearing of the oil-cooled motor, the current does not pass through the bearing but flows to the conduction part through the motor shaft, then flows to the motor shell through the conduction part and the motor junction box, and the motor shell is grounded, so that the overall safety is ensured, the electric corrosion of the bearing is avoided, and the service life of the bearing is prolonged.

Further, the conduction part is fixed on an oil seal, the oil seal is installed inside the motor junction box, and the oil seal blocks a gap between the motor shaft and the motor junction box.

According to the technical means, the cooling oil can be prevented from entering the inside of the motor junction box, the motor cooling oil is prevented from entering the corrosion conduction part, and the oil is prevented from entering the cavity to form an oil film between the conduction part and the motor shaft to influence the conductivity.

Furthermore, the inside of motor terminal box is equipped with the mounting groove, the oil blanket is fixed in the mounting groove with mounting groove interference fit's mode.

Further, the motor shaft passes through the center of the oil seal.

Further, the conduction part is bonded to the oil seal.

Further, the conduction part is a conductive non-woven fabric.

An automobile comprises an automobile body, wherein the oil-cooled motor is arranged in the automobile body.

The utility model has the advantages that:

the utility model discloses a bypass current's scheme can lead to motor casing through the conduction portion with motor shaft electric current because of conduction portion impedance is less than the bearing impedance, avoids the axle current to lead to the fact the damage to the bearing through the bearing. The utility model discloses can effectively solve the motor bearing electroerosion problem, its simple structure, dependable performance, applicable and the cold structure motor of oil.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the current flowing direction of the present invention, wherein the arrow direction is the current flowing direction.

Wherein, 1-a conducting part; 2-oil sealing; 3-a junction box cover; 4-motor shaft.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings and preferred embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure in the specification. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are presented for purposes of illustration only and are not intended to limit the scope of the present disclosure.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

The present embodiment proposes an oil-cooled motor, as shown in fig. 1 and 2, including a motor shaft 4, a motor terminal box cover 3 and a motor housing, where the motor terminal box cover 3 is conducted with the motor housing, and the motor housing is grounded.

The tip of motor shaft 4 stretches into the inside of motor junction box cover 3, still be equipped with conduction portion 1 in motor junction box cover 3, conduction portion 1 all switches on with the inner wall of motor shaft 4 and motor junction box cover 3, the impedance of conduction portion 2 is less than the impedance of the bearing of oil-cooled motor, make the electric current through motor shaft 4 can flow to the outer wall of motor junction box cover 3 through conduction portion 2, and then flow to motor housing, finally flow to ground, avoid the electric current to pass through the bearing, the electric erosion of electric current to the bearing has been reduced.

In this embodiment, oil blanket 2 arranges the inside at motor junction box lid 3, and the gap between shutoff motor shaft 4 and the motor junction box lid 3, conduction part 1 bonds on oil blanket 2, and then make and form a airtight cavity between oil blanket 2 and motor junction box lid 3 and the motor shaft 4, with the protection of conduction part 1 in the cavity, prevent that motor cooling oil from getting into the electrically conductive non-woven fabrics of corruption, also prevent that oil from getting into the cavity and forming the oil film between conduction part 1 and motor shaft 4 and influence electric conductive property, oil blanket 2 also can prevent the electrically conductive powder that conduction part 1 produced because of long-term wearing and tearing from getting into the inside motor that influences of motor stator.

In this embodiment, conduction portion 1 is electrically conductive non-woven fabrics, and motor shaft 4 passes oil blanket 2, and is equipped with the mounting groove in motor wire box cover 3 inside, and the inside at motor wire box cover 3 is fixed with mounting groove interference fit's mode to oil blanket 2.

This embodiment has still provided an automobile, including the automobile body, the automobile body is equipped with above-mentioned oil-cooled motor.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitution or transformation made by the technical personnel in the technical field on the basis of the utility model is within the protection scope of the utility model.

Claims (7)

1. The utility model provides an oil-cooled motor, includes motor shaft, motor terminal box and motor casing, the motor terminal box switches on with motor casing, motor casing ground connection, its characterized in that: the end part of the motor shaft extends into the motor junction box, the oil-cooled motor further comprises a conduction part, the conduction part is located inside the motor junction box, the conduction part is conducted with the end part of the motor shaft and the side wall of the motor junction box, and the impedance of the conduction part is smaller than that of a bearing of the oil-cooled motor.

2. The oil-cooled motor of claim 1, wherein: the conduction part is fixed on an oil seal, the oil seal is installed inside the motor junction box, and the oil seal blocks a gap between the motor shaft and the motor junction box.

3. The oil-cooled motor of claim 2, wherein: the inside of motor terminal box is equipped with the mounting groove, the oil blanket is fixed in the mounting groove with mounting groove interference fit's mode.

4. The oil-cooled motor of claim 3, wherein: the motor shaft penetrates through the center of the oil seal.

5. The oil-cooled motor of claim 4, wherein: the conduction part is bonded on the oil seal.

6. The oil-cooled motor of claim 4, wherein: the conduction part is made of conductive non-woven fabric.

7. An automobile comprising a body, characterized in that: an oil-cooled motor according to any one of claims 1 to 6 is provided in the vehicle body.

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