CN219611546U - Motor - Google Patents

Abstract

The utility model relates to a motor, which comprises a stator, a motor and a motor, wherein the stator is provided with a stator core and a stator winding; a rotor disposed radially inside the stator; a rotor shaft located radially inside the rotor and provided with a first gear; at least one second gear which is meshed with the first gear, and which is connected with an air flow generating device, and the air flow generating device is located between the stator and the second gear in a direction parallel to an axis of the rotor shaft. According to the scheme provided by the utility model, the rotor drives the first gear and then drives at least one second gear, so that air flow is generated when the second gear rotates, the air quantity is increased, the cooling performance is improved, the air flow generating device is driven simultaneously when the motor works, and a separate power supply is not required to be arranged.

Description

Motor

Technical Field

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

Background

The motor has a stator and a rotor. In permanent magnet motors, stator windings are provided in the stator and permanent magnets are provided in the rotor. When the motor works, current is introduced into the stator winding, so that a magnetic field is generated, and the rotor is driven to operate, so that power is generated. Heat is generated in the stator windings due to the thermal effect of the current. In addition, heat is generated at the core of the motor or the like due to hysteresis loss, eddy current loss, or the like.

Accordingly, there is a continuing need in the art of electric machines for improvements in cooling technology for electric machines.

Disclosure of Invention

In combination with research and improvement of motor technology by the applicant, the utility model provides the following technical scheme for further improving the cooling performance of the motor.

An electric machine, comprising:

a stator having a stator core and a stator winding;

a rotor disposed radially inside the stator;

a rotor shaft located radially inside the rotor and provided with a first gear;

and the second gear is meshed with the first gear, the second gear is fixedly connected with the airflow generating device, and the airflow generating device is positioned between the stator and the second gear in a direction parallel to the axis of the rotor shaft.

According to the scheme provided by the utility model, the rotor drives the first gear and then drives at least one second gear, so that air flow is generated when the second gear rotates, the air quantity is increased, the cooling performance is improved, the air flow generating device is driven simultaneously when the motor works, and a separate power supply is not required to be arranged.

According to one aspect of the utility model, the air flow generating means is at least one vane provided on a side of the second gear facing the stator. In this way, the blades are directly arranged on the gears, so that after the second gear is installed, the blades are positioned, independent installation of the blades is not needed, and the installation flow is saved.

According to one aspect of the utility model, the airflow generating device is a fan. In this way, the existing gear and the existing fan can be used, and only the existing gear and the existing fan are fixedly connected.

According to an aspect of the present utility model, the number of the second gears is three, four, five or six, and a plurality of the second gears are uniformly distributed in the circumferential direction. The number of the second gears may be set according to the heat dissipation requirement, the rotation speed, etc. of the motor. Through setting it to evenly distributed in circumference, both can make whole cooling device load balance, the steady operation during rotation also can make its produced amount of wind even to the realization is to the effective cooling of motor.

According to one aspect of the utility model, the motor further comprises a gear mount, the second gear being disposed on the gear mount.

According to one aspect of the utility model, the gear mounting frame has a body, on one side of which there are provided the same number of mounting posts as the number of second gears, the second gears being provided on the mounting posts.

According to one aspect of the utility model, the gear mounting bracket is provided with a plurality of lightening holes. By providing the lightening holes, weight can be reduced and materials can be saved.

According to an aspect of the present utility model, a mounting hole is provided at a central position of the body of the gear mounting bracket, and the gear mounting bracket can be connected with the fixing member of the motor via the mounting hole.

According to one aspect of the utility model, the second gear is rotatably arranged on the mounting post via a bearing

According to one aspect of the utility model, the motor is a permanent magnet synchronous motor.

Other features and advantages of the present utility model will be described in the following detailed description of the utility model, taken in conjunction with the accompanying drawings.

Drawings

Exemplary embodiments of the present utility model are described with reference to the accompanying drawings, in which:

fig. 1 shows a perspective view of the motor of the present utility model.

Fig. 2 shows a perspective view of the part of the motor of the utility model after removal of the housing and stator.

Fig. 3 shows a schematic view of the installation of the cooling device according to the utility model on a rotor shaft of an electric machine.

Fig. 4 shows a plan view of the individual gears of the cooling device of the utility model.

Fig. 5 shows a perspective view of the gear mount of the cooling device of the utility model.

All the figures are schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, the other parts being omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.

In the drawings, identical and/or functionally identical technical features are provided with the same or similar reference signs.

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 the motor of the present utility model. As shown in fig. 1, the motor 100 includes a housing 101, a rotor accommodated inside the housing 101, a rotor shaft 102 fixedly connected to the rotor, and a stator 103. One end of the rotor shaft 102 is supported on the housing 101 by a bearing. Also shown on one side of the motor in fig. 1 is a cooling device 200 for cooling the stator 103 of the motor. To illustrate the stator 103 and the like, only a portion of the housing 101 in fig. 1 is shown.

Fig. 2 shows a perspective view of the part of the motor of the utility model after removal of the housing and stator. From fig. 2, it can be seen that the rotor 104 of the electric machine is housed radially inside the stator 103. The stator 103 includes a stator core and stator windings. The stator core may be formed of a stack of a plurality of silicon steel sheets, on which a plurality of stator teeth and stator slots between the stator teeth are formed, and the stator windings are wound around the stator teeth and thus accommodated within the stator slots. When current is applied, the stator windings may generate a magnetic field. Accordingly, a magnet, which may be a permanent magnet, for example, is provided in the rotor 104. When the motor works, the magnet in the rotor 104 rotates under the action of the magnetic field generated by the stator 103, and then drives the rotor shaft 102 fixedly connected with the rotor 104 to rotate, so that torque is output.

According to a preferred embodiment of the present utility model, the motor 100 may be a permanent magnet synchronous motor, having a plurality of permanent magnets disposed radially inward of its rotor 104. Because the permanent magnet synchronous motor does not have a mechanical reversing device and does not need an excitation circuit, the permanent magnet synchronous motor has higher power density and energy conversion efficiency.

The motor 100 is preferably used as a belt-driven power generation unit, and may be particularly suitable for use on a hybrid vehicle, such as a 48V battery. When the motor 100 is installed on a hybrid vehicle as a 48V belt-start power generation integrated machine, the motor can be connected with an engine through a belt, can work as a start motor of the engine, can also work as a start power failure work of the vehicle, and can also work together with the engine as a motor output torque when higher power is required in the running process of the vehicle. In addition, the motor 100 may also operate as a generator during deceleration of the vehicle to convert kinetic energy of the vehicle into electrical energy for energy recovery.

When the motor is operated, since a current is applied to the windings of the stator 103, heat is generated, and heat dissipation from the stator 103 is required. For this purpose, a cooling device 200 is also provided on the electric machine 100. Fig. 3 shows a schematic view of the installation of the cooling device according to the utility model on the rotor shaft of an electric motor, and fig. 4 shows a plan view of the individual gears of the cooling device according to the utility model. As can be seen in fig. 3 and 4, the cooling device 200 comprises a gear mount 201 and a plurality of second gears 202. A first gear 105 is provided on the rotor shaft 102 as a drive gear of the cooling device, and the first gear 105 is engaged with a plurality of second gears 202, respectively.

As a preferred embodiment, the plurality of second gears 202 are uniformly distributed on the radially outer side of the first gear 105 in the circumferential direction. By arranging the cooling devices to be uniformly distributed in the circumferential direction, the cooling device can not only balance the load of the whole cooling device and stably run during rotation, but also uniformly cool the motor by the air quantity generated after the cooling device is connected with an air flow generating device which will be described below.

Further, although 5 second gears 202 are shown in fig. 4, the second gears 202 may be provided in other numbers. For example, it may be set to 3, or 4. The number of the second gears 202 may be set according to the heat dissipation requirement of the motor, the rotation speed, etc.

As can be seen from fig. 4, a plurality of blades 203 as air flow generating means are provided on each of the second gears 202, and the blades 203 are provided on the side of the second gears 202 facing the stator 103. Whereby the vanes 203 on each second gear 202 are able to generate an air flow when the second gears 202 are rotated, thereby achieving cooling of the stator.

Instead of providing the blade 203 on the second gear 202 such that the second gear 202 itself also rotates as a fan, other ways may be used. For example, a separate fan may be provided as the air flow generating means, and fixedly coupled to the second gear 202, so that the separate fan can be rotated when the second gear 202 is rotated.

Fig. 5 shows a perspective view of the gear mount of the cooling device of the utility model. The gear mount 201 has a disk-shaped body 2011, and a plurality of mounting posts 2012 are provided on one side surface of the body 2011 for mounting the second gears 202, the number of the mounting posts 2012 being the same as the number of the second gears 202. Since the second gear 202 needs to rotate on the mounting post 2012, in order to reduce friction therebetween, the second gear 202 is mounted on the mounting post 2012 by a bearing or the like.

As a preferred embodiment, a plurality of holes 2013 are also provided on the body 2011 to reduce weight and save material.

The gear mount 201 is connected to a fixed member. For example, in order to fix the gear mount 201, a fixing hole 2014 may be opened at a central position of the body 2011, and the gear mount 201 may be fixed to a fixing member of the motor, such as a housing or the like, via the fixing hole 2014.

The structure of the motor of the present utility model is described in detail above. As can be seen from the above, when the motor is operated, the first gear 105 on the rotor shaft 102 rotates together with the rotation of the rotor shaft 102, so as to drive the plurality of second gears 202 on the gear mounting frame 201 to rotate, and the plurality of blades on the second gears 202 generate air flow when rotating with the second gears 202, so as to cool the stator 103. In this way, the stator windings are cooled, the temperature of the stator can be in a normal range without additional control of an inverter, and a separate driving device and power supply are not required for the fan.

Compared with the scheme that only one fan is arranged on the rotor shaft of the motor or two fans are arranged on two sides of the shaft, the scheme of the utility model drives the first gear and then drives a plurality of second gears through the rotor, so that air flow is generated when the second gears rotate, the air quantity is increased, the cooling performance is improved, and the defect that the cooling performance of the stator winding and the inverter is insufficient due to limited air quantity of one fan or two fans is overcome.

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 having a stator core and a stator winding;

a rotor disposed radially inside the stator;

a rotor shaft located radially inside the rotor and provided with a first gear;

and the second gear is meshed with the first gear, the second gear is fixedly connected with the airflow generating device, and the airflow generating device is positioned between the stator and the second gear in a direction parallel to the axis of the rotor shaft.

2. The electric machine according to claim 1, characterized in that the air flow generating means are at least one blade provided on the side of the second gear facing the stator.

3. The electric machine of claim 1, wherein the airflow generating device is a fan.

4. A motor according to any one of claims 1-3, wherein the number of the second gears is three, four, five or six, and a plurality of the second gears are uniformly distributed in the circumferential direction.

5. A motor as claimed in any one of claims 1 to 3, further comprising a gear mount, the second gear being disposed on the gear mount.

6. The motor of claim 5, wherein the gear mount has a body on one side of which there are provided the same number of mounting posts as the number of second gears rotatably provided on the mounting posts.

7. The motor of claim 6, wherein the gear mount body is provided with a plurality of lightening holes.

8. The motor of claim 6, wherein a mounting hole is provided at a center position of the body of the gear mount, the gear mount being connectable with a fixing member of the motor via the mounting hole.

9. The motor of claim 6, wherein the second gear is rotatably disposed on the mounting post via a bearing.

10. A motor according to any one of claims 1-3, characterized in that the motor is a permanent magnet synchronous motor.