CN219394598U

CN219394598U - Disc motor of integrated brake

Info

Publication number: CN219394598U
Application number: CN202320307449.7U
Authority: CN
Inventors: 杨子谋
Original assignee: Xiamen Tungsten Co Ltd
Current assignee: Xiamen Tungsten Co Ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-07-21
Anticipated expiration: 2033-02-24

Abstract

The utility model provides a disc motor integrated with a brake, which is characterized in that a stator, a rotor, the brake, a bearing assembly, an end cover, an output shaft, a through hole and other structural members are arranged, and an extended through hole is arranged to form an installation space of the bearing assembly; the bearing assembly achieves the function of absorbing axial load and radial load, so that the large repulsive force of the disc motor stator to the rotor is reduced, the influence of an air gap between the stator and the rotor on the motor output is avoided, other mechanical structures are protected, the service life of the motor is prolonged, the axial size is also saved, and convenience is brought to motor installation in a narrow space; the relative positions of the stator and the rotor are converted, the rotor is arranged in front, and the axial space is saved so that the brake has enough space to be installed; the motor has the advantages of simple structure, good braking effect, low failure rate, long service life and good application prospect.

Description

Disc motor of integrated brake

Technical Field

The utility model belongs to the technical field of disc motors, and particularly relates to a disc motor integrated with a brake.

Background

Disc motors are generally referred to as axial permanent magnet motors, which are also referred to as disc permanent magnet motors, and are getting more attention due to their compact structure, high efficiency, high power density, etc. The disc motor is particularly suitable for applications requiring high torque density and compact space, such as electric vehicles, renewable energy systems, gear energy storage systems, industrial equipment, and the like. Besides the application in the fields of electric vehicles, flywheel energy storage and wind power generation, axial permanent magnet motors are widely used in the fields of aerospace, household appliances, ship propulsion and the like where high torque density and compact space are required.

The existing disc motor is braked in a way that an electromagnetic brake is arranged at the tail part of the motor, when the motor is electrified, the motor is electrified and attracted, at the moment, the two friction surfaces of the tail part are separated by the attraction force generated by direct current, and the motor rotates freely and is not braked; on the contrary, the motor is braked by the restoring force of the spring, namely, the motor is powered off when the motor is powered off, and the mode that the spring pushes the rotor after power failure against the inner surface of the shell is adopted, so that the motor is braked by the brake under the action of the spring. For the permanent magnetic disk motor, the braking mode can cause the magnetic steel to fall off and lose efficacy or even cause the damage of the rotor due to the impact between the rotor and the shell after the spring is reset.

Disclosure of Invention

The utility model provides a disc motor integrated with a brake, which can effectively solve the problems.

The utility model is realized in the following way:

a disc motor integrated with a brake comprises a shell, an output shaft, an end cover, a stator, a rotor, a bearing assembly and the brake; the end cover is arranged at the front end of the shell and a containing cavity is formed between the end cover and the shell; the middle part of the end cover is provided with a through hole extending towards the direction of the accommodating cavity _， To house all bearing assemblies; the output shaft penetrates through the through hole; the stator is arranged at the rear end of the accommodating cavity; the rotor is arranged at the front end of the accommodating cavity, is opposite to the stator, and is in interference fit with the output shaft; the bearing assembly is sleeved on the output shaft and embedded in the through hole and is used for absorbing axial load between the stator and the rotor; the brake is arranged in the inner cavity of the stator, is in interference fit with the output shaft and is connected with the rear end of the shell to control the rotor to brake.

As a further refinement, in other embodiments, the bearing assembly includes at least one thrust ball bearing and a deep groove ball bearing.

As a further refinement, in other embodiments, the bearing assembly includes one thrust ball bearing and two deep groove ball bearings mounted on the same side of the thrust ball bearing. As a further improvement, in other embodiments, the rotor is provided with a boss-like structure with a through hole corresponding to the through hole and a middle portion recessed toward the brake, so as to form an avoidance groove for avoiding the through hole and the bearing assembly.

As a further improvement, in other embodiments, the rear end of the casing is provided with a receiving groove protruding outwards and adapted to the brake.

As a further improvement, in other embodiments, an oil seal ring is disposed between the seal through hole of the end cap and the bearing assembly.

As a further improvement, in other embodiments, the brake comprises a brake electromagnet, a brake rotor, a first brake pad and a second brake pad which are positioned at two sides of the brake rotor, and the brake rotor is in interference fit with the output shaft; when the brake is powered on, the brake electromagnet attracts the second brake pad so as to enable the second brake pad to be far away from the first brake pad and release the brake rotor; when the brake is powered off, the brake electromagnet repels the second brake pad so that the second brake pad and the first brake pad jointly press the brake rotor to brake.

As a further improvement, in other embodiments, the shaft diameters of the corresponding deep groove ball bearings, the thrust ball bearings, the corresponding mounting positions of the rotor and the brake rotor are gradually decreased.

The beneficial effects of the utility model are as follows: the disc motor is provided with structural members such as a stator, a rotor, a brake, a bearing assembly, an end cover, an output shaft, a through hole and the like, and is provided with an extended through hole to form an installation space of the bearing assembly; the bearing assembly achieves the function of absorbing axial load and radial load, so that the large repulsive force of the disc motor stator to the rotor is reduced, the influence of an air gap between the stator and the rotor on the motor output is avoided, other mechanical structures are protected, the service life of the motor is prolonged, the axial size is also saved, and convenience is brought to motor installation in a narrow space; the relative positions of the stator and the rotor are converted, the rotor is arranged in front, and the axial space is saved so that the brake has enough space to be installed; the rear-mounted brake is more beneficial to the arrangement of other structures, and the whole volume and the mass of the motor are reduced; the motor has the advantages of simple structure, good braking effect, low failure rate, long service life and good application prospect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the construction of a disc motor incorporating a brake according to the present utility model;

FIG. 2 is a schematic illustration of a brake configuration of a disc motor incorporating a brake according to the present utility model;

FIG. 3 is a schematic diagram of a rotor construction of a disc brake-integrated motor of the present utility model;

fig. 4 is a schematic diagram of an end cover structure of a disc motor of an integrated brake according to the present utility model.

Reference numerals:

1-a shell; 11-a receiving cavity; 12-a containing groove; 2-an output shaft; 3-end caps; 31-through holes; 32-an oil seal ring; a 4-bearing assembly; 41-thrust ball bearings; 42-deep groove ball bearings; 5-stator; 6-rotor; 61-avoiding grooves; 7-a brake; 71-braking an electromagnet; 72-a first brake pad; 73-braking the rotor; 74-second brake pad.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

In the description of the present utility model, the terms "first," "second," and the like 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" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, the positional or positional relationship indicated by the terms such as "between," "middle," "inner," "outer," "inner," "one side," "middle," "surface," "upper," and the like are based on the positional or positional relationship shown in the drawings, and 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 configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-4, a disc motor for an integrated brake includes a housing 1, an output shaft 2, an end cover 3, a bearing assembly 4, a stator 5, a rotor 6, and a brake 7.

The end cover 3 is arranged at the front end of the shell 1 and forms an accommodating cavity 11 with the shell 1; the middle part of the end cover 3 is provided with a through hole 31 extending towards the direction of the accommodating cavity 11 so as to accommodate all the bearing assemblies 4; the output shaft 2 penetrates through the through hole 31; the shaft diameters of the deep groove ball bearings 42, the thrust ball bearings 41, the rotor 6 and the brake rotor 73 corresponding to the output shaft 2 are gradually decreased toward the rear end of the casing 1. On one hand, the occupied internal space of the output shaft 2 can be reduced, more space is provided for the installation of other components, and therefore the volume and the quality of the whole motor are reduced; on the other hand, through the step arrangement, each structure is installed in a partition mode, the running mutual interference or movement is reduced, and the stability and the orientation are improved. And an oil seal ring 32 is arranged between the sealing through hole 31 of the end cover 3 and the bearing assembly 4. For preventing the leakage of the lubricating oil of the bearing assembly 4.

The stator 5 is arranged at the rear end of the accommodating cavity 11; the stator 5 mainly comprises three parts, namely a stator core (not shown in the figure), a stator winding (not shown in the figure) and a stand (not shown in the figure), and the stator 5 is not described in detail in the prior art.

The rotor 6 is arranged at the front end of the accommodating cavity 11, is opposite to the stator 5 and is in interference fit with the output shaft 2; the rotor 6 is provided with a boss-shaped structure with a through hole 31 corresponding to the through hole 31 and a concave middle part towards the brake direction, so as to form an avoidance groove 61 for avoiding the through hole 31 and the bearing assembly 4. The overall length space of the housing 1 occupied by the end cover 3 and the bearing assembly 4 is reduced while ensuring the functional strength of the rotor 6, thereby saving the axial dimension and facilitating the installation of the motor in a narrow space.

The bearing assembly 4 is sleeved on the output shaft 2 and embedded in the through hole 31, and is used for absorbing axial load between the stator 5 and the rotor 6; the bearing assembly 4 comprises at least 1 thrust ball bearing 41 and a deep groove ball bearing 42. The thrust ball bearing 41 is designed to withstand thrust loads during high speed operation and is formed of a washer-like race with ball rolling raceway grooves, and is capable of withstanding axial loads but not radial loads. The deep groove ball bearing 42 is one of the most widely used rolling bearings, and is characterized by low frictional resistance and high rotational speed, and is mainly used for bearing radial loads. The combined use of the thrust ball bearings 41 and the deep groove ball bearings 42 with different numbers can be selected according to different scene requirements of the motor so as to achieve the effect of absorbing the generated axial load and radial load. As in the case where the mounting can be ensured, 2 or more deep groove ball bearings 42 are provided for controlling the radial force deflection, and for controlling the axial load, thrust ball bearings 41 may be provided at one or both ends, and in the case where the mounting can be performed, thrust ball bearings 41 may be provided at other positions. Preferably, 1 thrust ball bearing 41 is provided, 2 deep groove ball bearings 42 are provided, and the thrust ball bearings 41 are provided at the front end or the rear end of the through hole 31, namely, one thrust ball bearing 41 and two deep groove ball bearings 42 provided on the same side of the thrust ball bearings 41. Since the normal movement of the output shaft 2 is rotation, in order to be able to ensure the balance of the rotation of the output shaft 2, two deep groove ball bearings 42 are provided. Since the thrust ball bearing 41 is composed of two bearing caps and one ball ring, and is loose, it is difficult to install or impossible to install the thrust ball bearing at the middle position, and therefore, the thrust ball bearing is preferably arranged at the inner side ends of the through holes 31 at the two end positions. The cooperation of the two bearings can absorb the axial load and the radial load, thereby avoiding the damage of the motor caused by the impact between the rotor 6 and the casing 1 due to the spring reset.

The brake 7 is arranged in the inner cavity of the stator 5, is in interference fit with the output shaft 2 and is connected with the rear end of the shell 1 so as to control the rotor 6 to brake. The brake 7 comprises a brake electromagnet 71, a first brake pad 72, a brake rotor 73 and a second brake pad 74, wherein the brake electromagnet 71 is fixedly arranged in the accommodating groove 12 of the casing 1, the first brake pad 72 is arranged on the side, close to the output shaft 2, of the brake electromagnet 71, the brake rotor 73 is in interference fit with the output shaft 2 and is opposite to the first brake pad 72, and the second brake pad 72 is arranged on the brake rotor 73 and opposite to the first brake pad 74. The brake 7 is prior art and will not be described here again, only with corresponding changes in the connection of the components according to the present application. The basic working principle is that when the brake 7 is powered on, the first brake pad 72 is attracted by the brake electromagnet 71 at the rear of the brake pad and moves in a direction away from the second brake pad 74, and at the moment, the brake rotor 73 is not clamped by the two brake pads, so that the brake rotor can rotate and further drive the output shaft 2 to rotate; when the brake 7 is powered off, the first brake pad 72 moves towards the second brake pad 74, at the moment, the two brake pads clamp the brake rotor 73, and the brake rotor 73 is under the action of friction force, so that deceleration braking is realized, and synchronous braking is realized with the output shaft 2 in interference fit with the brake rotor 73. In the present application, two brake pads are used to clamp the brake rotor 73 to complete braking, so that on one hand, braking can be achieved more quickly and stably, and on the other hand, braking is achieved in a clamping mode, so that protection of the brake rotor 73 is facilitated. In some cases of meeting the braking requirement, the same braking effect can be achieved by directly contacting the first brake pad 72 with the brake rotor 73; the brake is realized by the action of the brake pad and the brake rotor in the two modes.

In addition, the rear end of the casing 1 is provided with an accommodating groove 12 protruding outwards and adapted to the brake 7. The accommodating groove 12 is provided with the brake 7, so that the internal structure of the casing 1 is more compact, and the material of the casing 1 is saved.

The motor is provided with a containing cavity 11 for assembling the stator 5, the rotor 6 and the brake 7, and a through hole 31 extending towards the containing cavity 11 for installing the bearing assembly 4; the stator 5 and the rotor 6 drive the output shaft 2 to rotate, the relative positions of the stator and the rotor are converted, the rotor is arranged in front, and the axial space is saved so that the brake 7 has enough space to be installed; the brake 7 controls braking of the rotor 6.

For better understanding of the structure of the present application, one embodiment of the present application will be specifically described, and a disc motor with integrated brake includes a casing 1, an output shaft 2, an end cover 3, a bearing assembly 4, a stator 5, a rotor 6, and a brake 7, where the end cover 3 is mounted at the front end of the casing 1 and a receiving cavity 11 is formed between the end cover and the casing 1; the middle part of the end cover 3 is provided with a through hole 31 extending towards the direction of the accommodating cavity 11 so as to accommodate all the bearing assemblies 4; the bearing assembly 4 comprises a thrust ball bearing 41 and two deep groove ball bearings 42 arranged on the same side of the thrust ball bearing 41; the output shaft 2 penetrates through the through hole 31; the rotor 6 is arranged at the front end of the accommodating cavity 11, is opposite to the stator 5 and is in interference fit with the output shaft 2; the rotor 6 is provided with a boss-shaped structure with a through hole 31 corresponding to the rotor, and the middle part of the boss-shaped structure is recessed towards the direction of the brake 7, so that avoiding grooves 61 avoiding the through hole 31 and the bearing assembly 4 are formed. The brake 7 is arranged in the inner cavity of the stator 5 and connected with the rear end of the shell 1, and is used for being in interference fit with the output shaft 2 and controlling the rotor 6 to brake. The brake 7 comprises a brake electromagnet 71, a brake rotor 73, and a first brake pad 72 and a second brake pad 74 positioned on two sides of the brake rotor 73; the brake rotor 73 is in interference fit with the output shaft 2; wherein, when the brake 7 is powered on, the brake electromagnet 71 attracts the second brake pad 74 to move the second brake pad 74 away from the first brake pad 72 and release the brake rotor 73; when the brake 7 is powered off, the brake electromagnet 71 repels the second brake pad 74 so that the second brake pad 74 and the first brake pad 72 jointly press the brake rotor 73 to brake. The rear end of the casing 1 is provided with an accommodation groove 12 protruding outwards. The accommodating groove 12 is provided with the brake 4. The shaft diameters of the corresponding deep groove ball bearings 42, thrust ball bearings 41, rotors 6 and corresponding mounting positions of the brake rotor 73 of the output shaft 2 are decreased stepwise. An oil seal ring 32 is arranged between the sealing through hole 31 of the end cover 3 and the bearing assembly 4.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A disc motor of integrated brake, includes casing and output shaft, its characterized in that still includes:

the end cover is arranged at the front end of the shell and forms a containing cavity with the shell; the middle part of the end cover is provided with a through hole extending towards the direction of the accommodating cavity; the output shaft penetrates through the through hole;

the stator is arranged at the rear end of the accommodating cavity;

the rotor is arranged at the front end of the accommodating cavity, is opposite to the stator, and is in interference fit with the output shaft;

the bearing assembly is sleeved on the output shaft and embedded in the through hole and is used for absorbing axial load between the stator and the rotor;

and the brake is arranged in the inner cavity of the stator, is in interference fit with the output shaft and is connected with the rear end of the shell so as to control the rotor to brake.

2. The brake-integrated disc motor of claim 1, wherein the bearing assembly comprises at least one thrust ball bearing and a deep groove ball bearing.

3. A disc brake motor according to claim 2, wherein the bearing assembly comprises a thrust ball bearing and two deep groove ball bearings mounted on the same side of the thrust ball bearing.

4. The disc motor of claim 1, wherein the rotor is provided with a boss-like structure with a central portion recessed toward the brake, corresponding to the through hole, so as to form a recess for avoiding the through hole and the bearing assembly.

5. The disc motor of claim 1, wherein the rear end of the housing is provided with an accommodating groove protruding outwards and adapted to the brake.

6. A disc brake integrated motor according to claim 1, wherein an oil seal ring is provided between the through hole and the bearing assembly.

7. The disc brake-integrated motor of claim 5, wherein the brake includes a brake electromagnet, a brake rotor, and first and second brake pads on opposite sides of the brake rotor; the brake rotor is in interference fit with the output shaft; when the brake is powered on, the brake electromagnet attracts the second brake pad so as to enable the second brake pad to be far away from the first brake pad and release the brake rotor; when the brake is powered off, the brake electromagnet repels the second brake pad so that the second brake pad and the first brake pad jointly press the brake rotor to brake.

8. The disc motor of claim 2, wherein the shaft diameters of the output shaft corresponding to the deep groove ball bearing, the thrust ball bearing, the rotor and the mounting position corresponding to the brake rotor are stepwise decreased toward the rear end of the housing.