CN219643690U

CN219643690U - Brushless DC motor with slotless hollow cup structure

Info

Publication number: CN219643690U
Application number: CN202223438476.2U
Authority: CN
Inventors: 牛俊; 孙策; 乔春雨
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-09-05
Anticipated expiration: 2032-12-21

Abstract

The utility model belongs to the technical field of brushless motors, and in particular relates to a brushless direct current motor with a slotless hollow cup structure, which comprises a shell, a stator iron core, a hollow cup winding and a circuit board assembly, wherein the stator iron core is arranged on the shell; the stator core is cylindrical and fixedly sleeved on the inner surface of the shell; the hollow cup winding adopts a diamond winding which is cylindrical and is fixedly sleeved on the inner surface of the iron core; the circuit board assembly is arranged in the shell and is electrically connected with the hollow cup winding; the hollow cup winding adopts the diamond winding, and can eliminate a relatively thick circular ring protrusion on the opening side of the cup-shaped armature winding, so that the structure of the motor is more compact, and the copper consumption and resistance loss of the winding are reduced.

Description

Brushless DC motor with slotless hollow cup structure

Technical Field

The utility model belongs to the technical field of brushless motors, and particularly relates to a brushless direct current motor with a slotless hollow cup structure.

Background

In the present stage, the acquisition channels of motors with excellent performance are narrower and narrower, and in order to solve the problems, the prior motor technology in China is urgently needed to be improved. In particular, in the aspect of national defense, the motor is mostly used for energy conversion in important equipment, so that the motor is required to have good functional characteristics and miniaturization, and the domestic motor demand is increasing, therefore, the motor cannot be limited to the traditional brushless direct current motor, and the development of the brushless direct current motor with a new structure is particularly important.

Disclosure of Invention

In view of this, the present utility model provides a brushless dc motor having a slotless hollow cup structure, in which the hollow cup winding is a diamond winding, and a relatively thick annular protrusion on the open side of the cup-shaped armature winding can be eliminated, so that the structure of the motor is more compact, and the copper consumption and resistance loss of the winding are reduced.

In order to achieve the technical purpose, the utility model adopts the following specific technical scheme:

a brushless dc motor of a slotless hollow cup construction comprising:

the shell assembly comprises a shell, a stator iron core, a hollow cup winding and a circuit board assembly; the stator iron core is cylindrical and is fixedly sleeved on the inner surface of the shell; the hollow cup winding is cylindrical and is fixedly sleeved on the inner surface of the iron core; the circuit board assembly is arranged in the shell and is electrically connected with the hollow cup winding;

a rotor mounted in an inner ring of the cup winding;

and a sensor assembly mounted in the housing for measuring a rotational characteristic of the rotor.

Further, the hollow cup winding is arranged in an insulating manner with the stator core.

Furthermore, the enameled wire outgoing lines of the hollow cup winding are connected in a star-shaped mode.

Further, the brushless direct current motor further comprises a cup-shaped shell front cover and a cup-shaped shell rear cover which are buckled and installed at two ends of the shell.

Further, the circuit board assembly is arranged perpendicular to the axial direction of the coreless winding; the common end of the hollow cup winding passes through the circuit board assembly in a straight line and is electrically connected with one end of the circuit board assembly far away from the hollow cup winding.

Further, the sensor component is a Hall element, the measuring direction of the Hall element faces to the rear cover of the shell, and the rotor is fixedly connected with the induction block in the rear cover of the shell; the Hall element is a paste type Hall element.

Further, the motor further comprises a distance adjustment assembly; the distance adjusting assembly comprises elastic check rings for holes sleeved on the rotor and adjusting gaskets which are contacted with each other; the number and thickness of the adjusting gaskets are used for enabling the stator core, the circuit board assembly and the sensor assembly to be tightly installed in the buckled shell and the shell rear cover.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of the overall structure of a brushless DC motor with a hollow cup structure in a tank according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the structural principle of the coreless winding in the embodiment of the utility model;

FIG. 3 is a schematic view of a stator according to an embodiment of the present utility model;

fig. 4 is a schematic diagram showing connection between an enamel wire and a circuit board assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a sensor assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the structure of the front cover of the housing according to the embodiment of the utility model;

wherein: 1. a rotor assembly; 2. a housing front cover; 3. a bearing; 4. a first slotted countersunk head screw; 5. a housing assembly; 6. a bearing; 7. adjusting the gasket; 8. circlips for holes; 9. a housing rear cover; 10. a circuit board assembly; 11. a sensor rear cover; 12. a second slotted countersunk head screw; 13. a sensor rotor; 14. a sensor upper pad; 15. a hexagonal thin nut; 16. a Hall element; 17. a stator core; 18. hollow cup windings.

Detailed Description

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the disclosure by way of illustration, and only the components related to the disclosure are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

In one embodiment of the present utility model, a brushless dc motor of a slotless hollow cup structure is provided, as shown in fig. 1, comprising:

a housing assembly 5 comprising a housing, a stator core 17, a coreless winding 18, and a circuit board assembly 10; the stator core 17 is cylindrical and fixedly sleeved on the inner surface of the shell; as shown in fig. 2, the coreless winding 18 is a diamond-shaped winding, is cylindrical, and is fixedly sleeved on the cylindrical inner surface of the iron core; the circuit board assembly 10 is mounted within the housing in electrical connection with the cup winding 18;

a rotor mounted in the inner ring of the cup winding 18;

and a sensor assembly installed in the housing for measuring a rotation characteristic of the rotor.

The present embodiment does not limit the structure of undescribed necessary components of the brushless dc motor.

In the present embodiment, the cup winding 18 is provided with insulation from the stator core 17.

In this embodiment, the wire leads of the coreless winding 18 are star-connected.

In this embodiment, the brushless dc motor further includes a cup-shaped housing front cover 2 and a cup-shaped housing rear cover 9 which are snap-fitted to both ends of the housing.

In this embodiment, the circuit board assembly 10 is disposed perpendicularly to the axial direction of the coreless winding 18; the common end of the cup winding 18 is electrically connected through the circuit board assembly 10 straight through the end of the circuit board assembly 10 remote from the cup winding 18.

In the embodiment, the sensor component is a Hall element 16, the measuring direction of the Hall element 16 faces the shell back cover 9, and the rotor is fixedly connected with the induction block in the position close to the shell back cover 9; the hall element 16 is a patch-type hall element 16.

In this embodiment, the motor further includes a distance adjustment assembly; the distance adjusting assembly comprises elastic check rings 8 for holes sleeved on the rotor and adjusting gaskets 7 which are contacted with each other; the spacers 7 are provided in an amount and thickness for tightly fitting the stator core 17, the circuit board assembly 10 and the sensor assembly in the snap-fit housing and the housing back cover 9.

Referring to fig. 1, the structure of the brushless dc motor of the slotless hollow cup structure of the present embodiment includes: rotor assembly 1, housing front cover 2, bearing 63, first slotted countersunk head screw 4, second slotted countersunk head screw 12, housing assembly 5, bearing 63, adjustment washer 7, circlip for hole 8, housing rear cover 9, circuit board assembly 10, sensor rear cover 11, sensor rotor 13, sensor upper washer 14, hexagonal thin nut 15. The housing assembly 5 is comprised of a stator comprising a stator core 17 and a cup winding 18, a housing and a circuit board assembly 10. Referring to fig. 2, the coreless winding 18 employs diamond windings which eliminate a relatively thick annular protrusion on the open side of the cup-shaped armature winding, thereby making the motor more compact and reducing the copper consumption and resistive losses of the winding.

Referring to fig. 3, the stator includes a stator core 17 and a cup winding 18, and when the cup winding 18 is mounted on the stator core 17, a polytetrafluoroethylene film is insulated between the winding and the core to prevent conduction between the winding and the core. In the process of electrifying and rotating the motor, the force is mutually applied, and the rotation of the rotor drives the coreless winding 18 to rotate, so that epoxy glue is sprayed on the winding end part to fix the coreless winding 18.

Referring to fig. 4, the lead wires of the enameled wire of the hollow cup winding 18 are connected in a star shape, and in order to prevent the end parts of the enameled wire from rubbing against the rotor, the common ends are short-circuited through the circuit board assembly 10. The welding hole of the circuit board assembly 10 is arranged at the outermost side of the circuit board assembly 10, the enameled wire is straightened when passing through the welding hole, and the enameled wire is prevented from rubbing the rotor in the rotating process of the motor. The housing has a mounting block left therein and the circuit board assembly 10 is secured to the mounting block by means of a J206 glue.

Referring to fig. 5, the hall element 16 of the circuit board assembly 10 is a surface-mounted hall element 16, the hall element 16 is attached to the circuit board assembly 10, the hall element 16 senses the magnetic field of the sensor rotor 13, and the surface-mounted hall element 16 reduces the size of the motor, thereby miniaturizing the motor.

Referring to fig. 6, the stator is put into the housing from the front end of the motor, mounting holes are provided in the front cover 2 of the housing for convenience in disassembly, and the stator can be taken out by opening the front cover if the stator is to be taken out for replacement during the motor assembly.

All the threaded connection parts of the brushless direct current motor are coated with the thread locking glue, so that the connection reliability during the operation of the motor can be ensured.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the disclosure are intended to be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A brushless dc motor of a slotless hollow cup construction comprising:

a rotor mounted in an inner ring of the cup winding;

2. The brushless dc motor of claim 1 wherein the coreless winding is insulated from the stator core.

3. The brushless dc motor of slotless coreless construction of claim 2 wherein the wire leads of the coreless winding are star connected.

4. A brushless dc motor having a slotless hollow cup structure according to claim 3 further comprising a cup-shaped housing front cover and a cup-shaped housing rear cover snap-fitted over both ends of the housing.

5. The brushless dc motor of slotless coreless construction of claim 4 wherein the circuit board assembly is disposed perpendicularly to the axial direction of the coreless winding; the common end of the hollow cup winding passes through the circuit board assembly in a straight line and is electrically connected with one end of the circuit board assembly far away from the hollow cup winding.

6. The brushless dc motor of claim 5, wherein the sensor assembly is a hall element, the measuring direction of the hall element is toward the housing back cover, and the rotor is fixedly connected with an induction block in the vicinity of the housing back cover; the Hall element is a paste type Hall element.

7. The brushless dc motor of claim 6, further comprising a distance adjustment assembly; the distance adjusting assembly comprises elastic check rings for holes sleeved on the rotor and adjusting gaskets which are contacted with each other; the number and thickness of the adjusting gaskets are used for enabling the stator core, the circuit board assembly and the sensor assembly to be tightly installed in the buckled shell and the shell rear cover.