CN113315268B

CN113315268B - Stator assembly and motor

Info

Publication number: CN113315268B
Application number: CN202110566222.XA
Authority: CN
Inventors: 秦宗仁; 孙伟力; 唐林; 肖胜宇; 李振华; 吴金梁
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2022-07-26
Anticipated expiration: 2041-05-24
Also published as: CN113315268A

Abstract

The application provides a stator assembly and a motor. The stator assembly comprises a bridging piece (1) and at least two stator elements, each stator element comprises a core (2) and a framework (3), the frameworks (3) are at least partially wrapped outside the core (2), the frameworks (3) of the two adjacent stator elements are connected through the bridging piece (1), and the bridging piece (1) is formed separately and is fixedly connected with the frameworks (3) in an inserting fit mode. According to the stator assembly, the situation that the bridging piece is fixed by slotting on the stator iron core can be avoided, a magnetic circuit cannot be influenced, and the performance of the motor is effectively improved.

Description

Stator assembly and motor

Technical Field

The application relates to the technical field of motors, in particular to a stator assembly and a motor.

Background

A stator for a four-pole motor may include two C-shaped cores disposed on opposite sides of a rotor. The use of a C-shaped core allows for more fill for the stator and is easier to wind relative to a conventional single full round core.

Disclosed in the related art is a stator of an electric motor, the stator including a plurality of stator elements each including a C-shaped core having two poles, each pole of each stator element being fixed to a pole of an adjacent stator element by a bridge formed of a non-magnetic material and molded to the pole. In the motor stator, because the bridging piece is fixed on the stator magnetic pole, a groove or a bulge is correspondingly required to be formed on the iron core punching sheet close to the tooth boot part for fixing, so that the magnetic circuit is influenced, and the performance of the motor is further influenced.

Disclosure of Invention

Therefore, an object of the present invention is to provide a stator assembly and a motor, which can avoid slotting on a stator core to fix a bridging element, and can effectively improve the performance of the motor without affecting a magnetic circuit.

In order to solve the above problems, the present application provides a stator assembly, which includes a bridge and at least two stator elements, each stator element includes a core and a frame, the frame at least partially wraps the core, the frames of two adjacent stator elements are connected by the bridge, and the bridge is separately formed and fixedly connected with the frame in an insertion fit manner.

Preferably, the bridging piece and the framework are in mortise and tenon fit.

Preferably, the bridge and the framework are in clearance fit and are adhesively secured.

Preferably, a slot is arranged on the end face of the connecting end of the framework facing the bridging element, a guide rail is arranged on the end face of the connecting end of the bridging element facing the framework, and the guide rail is inserted into the slot.

Preferably, the slot extends along the length direction of the connecting end face of the framework and penetrates through the framework along the extending direction.

Preferably, the slot extends along the length direction of the connecting end face of the framework, a stopping step is arranged at the tail end of the slot, and the tail end of the guide rail is stopped on the stopping step.

Preferably, the height of the stop step in the direction of extension of the insertion slot is less than half the height of the framework in this direction.

Preferably, the slot extends along the length direction of the connecting end face of the framework, the end part of the inserting end of the slot is provided with a stopping groove, the guide rail is provided with a stopping block, and after the guide rail is inserted into the slot, the stopping block stops in the stopping groove.

Preferably, the cross-sectional opening of the slot is constricted in a direction away from the slot bottom.

Preferably, a protrusion or a recess is provided on an inner wall of the slot.

Preferably, the bridge is provided with a mounting groove, and the hall sensor is mounted in the mounting groove.

Preferably, the bridge is made of a non-magnetic material.

Preferably, the core is a C-shaped core.

According to another aspect of the present application, there is provided an electric machine including a stator assembly and a rotor assembly, the stator assembly being the stator assembly described above.

The stator assembly comprises a bridging piece and at least two stator elements, wherein each stator element comprises a core part and a framework, the frameworks are at least partially wrapped outside the core part, the frameworks of the two adjacent stator elements are connected through the bridging piece, and the bridging piece is formed separately and is fixedly connected with the frameworks in an inserting fit mode. Stator module in this application links together the piecemeal iron core through the grafting cooperation of bridgeware and skeleton, can reduce stator rotor to the heart installation degree of difficulty, guarantees the air gap precision, and stator module adopts bridgeware and skeleton grafting complex mode to realize the fixed connection between the piecemeal iron core, need not to slot on the core, consequently can not influence the motor magnetic circuit, can effectively improve the motor performance. The bridging piece is formed independently, and is fixedly spliced with the framework after being formed without adopting a secondary injection molding process, so that the process difficulty can be reduced, and the process requirement is lower.

Drawings

Fig. 1 is a schematic structural view of a stator assembly according to an embodiment of the present application;

fig. 2 is a perspective view of a stator assembly according to an embodiment of the present application;

FIG. 3 is a schematic view of a stator element configuration of a stator assembly of an embodiment of the present application;

FIG. 4 is a perspective view of a stator element of a stator assembly according to one embodiment of the present application;

FIG. 5 is a structural schematic view of a bridge of a stator assembly of an embodiment of the present application;

FIG. 6 is a schematic structural view of a stator element of a stator assembly of an embodiment of the present application;

FIG. 7 is a structural schematic view of a bridge of a stator assembly of an embodiment of the present application;

FIG. 8 is a schematic structural view of a stator element of a stator assembly of an embodiment of the present application;

fig. 9 is a structural schematic view of a bridge of a stator assembly of an embodiment of the present application.

The reference numerals are represented as:

1. a bridge member; 2. a core; 3. a framework; 4. inserting slots; 5. a guide rail; 6. mounting grooves; 7. a Hall sensor; 8. a rotor assembly; 9. a winding; 10. a stopping step; 11. a stopper groove; 12. and a stop block.

Detailed Description

Referring to fig. 1 to 9 in combination, according to an embodiment of the present application, a stator assembly includes a bridge 1 and at least two stator elements, each stator element includes a core 2 and a frame 3, the frame 3 at least partially wraps the core 2, the frames 3 of two adjacent stator elements are connected by the bridge 1, and the bridge 1 is separately formed and is fixedly connected with the frames 3 in a plug-fit manner.

Stator module in this application links together the piecemeal iron core through the grafting cooperation of bridgeware 1 with skeleton 3, can reduce stator rotor to the installation degree of difficulty to the heart, guarantees the air gap precision, and single phase motor needs special air gap design to guarantee that the motor can be from starting, and stator rotor to the heart accuracy can guarantee that the motor obtains more stable ability from starting.

Stator module adopts

bridle

1 and 3 modes of pegging graft of skeleton to cooperate of realization piecemeal iron core between fixed connection, need not to slot on core 2, can not change the iron core tooth width, consequently can not influence the motor magnetic circuit, can effectively improve the motor performance.

The bridge part 1 is formed separately and fixedly connected with the framework 3 through plug-in fit after being formed, and a secondary injection molding process is not needed, so that the process difficulty can be reduced, and the process requirement is low.

The number of the stator elements and the bridges 1 in the present application is multiple, wherein two adjacent cores 2 of different stator elements are fixedly connected through one bridge 1, so that the stator elements can be fixedly connected together through the bridge 1 to form an integral structure.

The core 2 comprises a lamination of a plurality of sheets of magnetic material, such as silicon steel sheets, in the present embodiment, the core 2 is a C-shaped core, and comprises a yoke portion and two tooth portions extending from opposite end surfaces of the yoke portion, each tooth portion extends towards a rotating shaft hole in the middle of the stator assembly, and the end of each tooth portion is called a tooth shoe portion. By adopting the C-shaped core, the size of the stator assembly can be reduced, the weight of the stator assembly is reduced, and the winding difficulty is reduced.

Each framework 3 is wrapped outside the teeth of the core 2, a winding 9 is wound outside each framework 3, a pair of windings 9 on each stator element are connected in parallel, and then the windings 9 on other stator elements are connected in parallel to form a whole single-phase winding.

In the present embodiment, there are two stator elements and two bridges 1, and the two stator elements are arranged so that the tooth shoes are disposed opposite to each other and are connected and fixed together by the two bridges 1. More specifically, the first bridge secures the backbone wrapped over the first tooth of the first stator element to the backbone wrapped over the first tooth of the second stator element, and the second bridge secures the backbone wrapped over the second tooth of the first stator element to the backbone wrapped over the second tooth of the second stator element. Each bridge 1 thus bridges between two stator elements.

In one embodiment, the mortise and tenon matching is adopted between the bridging element 1 and the framework 3, so that the stable and reliable connection structure between the bridging element 1 and the framework 3 can be ensured, and the falling-off is not easy to occur. In order to further ensure the connection strength between the bridge member 1 and the framework 3, glue can be filled between the bridge member and the framework to enhance the connection performance.

In one embodiment, the bridge 1 and the framework 3 are a clearance fit and adhesively secured. In the embodiment, glue or the like can be filled in the gap between the bridge piece 1 and the framework 3, so that after the bridge piece 1 is inserted into the framework 3, stable connection can be formed by using the gluing effect of the glue, and the stability and the reliability of the connection structure are ensured. Because the bridge part 1 is in clearance fit with the framework 3, the difficulty of mounting the bridge part 1 on the framework 3 can be reduced, and the mounting efficiency is improved.

In one embodiment, a slot 4 is disposed on the end surface of the connecting end of the framework 3 facing the bridge member 1, a guide rail 5 is disposed on the end surface of the connecting end of the bridge member 1 facing the framework 3, the guide rail 5 is inserted into the slot 4, the slot 4 is a closed structure, and a cross-sectional opening of the slot 4 is contracted in a direction away from the bottom of the slot 4. In this embodiment, after the guide rail 5 is inserted into the slot 4, since the slot 4 is a closed structure, and the shape of the guide rail 5 is adapted to the shape of the slot 4, the guide rail 5 can be limited in the slot 4 by using the closed structure of the slot 4, so as to prevent the guide rail 5 from coming off from the slot 4 along the opening direction of the end face of the connecting end, and improve the stability of the connecting structure between the framework 3 and the bridge member 1.

The cross section of the slot 4 is in a dovetail shape, a trapezoid shape, a major arc shape and the like, and can limit the guide rail inserted into the slot 4 and prevent the guide rail from coming off from the opening of the slot 4, so that the bridge piece 1 and the framework 3 are limited in combination, relative displacement between the bridge piece 1 and the framework in the opening direction of the slot 4 is avoided, and assembly stability is guaranteed.

In one embodiment, the slot 4 extends along the length direction of the connecting end face of the frame 3 and penetrates the frame 3 along the extending direction. In order to prevent the bridge 1 from being pulled out along the extension direction of the slot 4 after being installed in the slot 4 of the framework 3, the guide rail 5 and the slot 4 may be in an interference fit or may be fixed by gluing.

In one embodiment, the slot 4 extends along the length direction of the connecting end face of the framework 3, a stopping step 10 is arranged at the tail end of the slot 4, and the tail end of the guide rail 5 is stopped on the stopping step 10. The backstop step 10 at the tail end of the slot 4 can form backstop positioning for installation of the guide rail 5, the guide rail 5 can be installed in the slot 4 in place, and meanwhile, the guide rail 5 is prevented from further sliding relative to the slot 4, so that the guide rail 5 is kept in the slot 4, the guide rail 5 is effectively prevented from being separated from the slot 4, and the stability of a connecting structure between the framework 3 and the bridging piece 1 is improved.

As a preferred embodiment, the height of the stopping step 10 along the extending direction of the slot 4 is less than half of the height of the framework 3 in the extending direction, so that while the stopping step 10 ensures the insertion depth of the guide rail 5 of the bridge 1, a sufficient matching length is provided between the bridge 1 and the framework 3, a sufficient force strength of the guide rail 5 is ensured, and the reliability of the connection structure of the two is improved.

In one embodiment, the slot 4 extends along the length direction of the connecting end face of the framework 3, the insertion end of the slot 4 is provided with a stop groove 11, the rail 5 is provided with a stop block 12, and after the rail 5 is inserted into the slot 4, the stop block 12 stops in the stop groove 11. In the present embodiment, the stop block 12 at the end of the guide rail 5 can limit and stop the installation depth of the guide rail 5 in the slot 4, and prevent the guide rail 5 from coming out of the slot 4 directly along the extending direction of the slot 4, thereby ensuring the stability and reliability of the connection structure between the framework 3 and the bridge 1.

As a preferred embodiment, the height of the stop block 12 along the extending direction of the slot 4 is less than half of the height of the bridge 1 in the extending direction, so that while the stop block 12 ensures the insertion depth of the guide rail 5 of the bridge 1, the bridge 1 and the framework 3 have sufficient matching length, the guide rail 5 has sufficient stress strength, and the reliability of the connection structure of the two is improved.

In the present embodiment, the length direction of the end face of the connecting end is also the axial direction of the rotating shaft hole, and since the frame 3 is a square frame structure, what is used to connect with the bridge 1 here is a frame of the frame 3 located at a side far from the rotating shaft hole.

In one embodiment, the connecting ends of the bridge 1 may be provided with the slots 4, and the connecting ends of the framework 3 are provided with the guide rails 5, so that the splicing and fixing fit between the bridge 1 and the framework 3 can be realized.

In one embodiment, the inner wall of the slot 4 is provided with a protrusion or a depression. The positions corresponding to the bulges or the depressions on the surface of the guide rail 5 are provided with the depressions or the bulges matched with the bulges or the depressions, so that when the guide rail 5 is inserted into the slot 4, the bulges or the depressions on the inner wall of the slot 4 are matched with the depressions or the bulges on the guide rail 5, a limit position is formed in the sliding direction of the guide rail 5 and the slot 4, and the bridge piece 1 is prevented from being separated from the framework 3. The protrusions are, for example, a plurality of bumps or bumps, and the recesses are, for example, bar-shaped grooves or spherical grooves.

In one embodiment, a mounting slot 6 is provided on the bridge 1, and a hall sensor 7 is mounted in the mounting slot 6. The mounting groove 6 is opened along the axial direction of the rotating shaft hole and is used for mounting the Hall sensor 7, and the Hall sensor 7 is positioned and arranged in the mounting groove 6 of one bridging piece 1.

The slot position of the mounting groove 6 on the bridge member 1 can more accurately fix the position of the Hall sensor 7 through design, the Hall sensor 7 has an optimal position in the motor to ensure the accurate synchronization of excitation and rotor position, the stable operation of the control motor is ensured, and the position of the Hall sensor can be more accurately positioned through the slot position limitation of the Hall element bracket and the mounting groove 6.

In one embodiment, the bridge 1 is made of a non-magnetic material, thereby avoiding the bridge 1 from affecting the magnetic circuit of the motor and ensuring the performance of the motor.

In one embodiment, each of the frames 3 is provided with two holes for fixing a connection terminal, the connection terminal is made of a conductive non-magnetic metal material, the holes and the size of the terminal are selected by transition fit, and the gap is filled with an adhesive and further fixed.

The assembly process of the stator assembly is as follows:

the stator is manufactured by assembling each stator element by molding the bobbin 3 on the teeth of the core 2 to form a stator element without the winding 9, fixing the connection terminals on the upper portion thereof as shown in fig. 3, and then winding the winding 9 on the bobbin 3 and fixing the wire ends on the connection terminals.

After the whole stator assembly is completed, as shown in fig. 2, the motor can be assembled more easily, the position of the stator assembly can be accurately positioned through the matching of the yoke slot of the stator element and the corresponding slot on the motor shell, and the stator assembly is further fixed through an adhesive. Meanwhile, the rotor is fixed through the casing, so that the centering and the air gap of the stator and the rotor can be ensured to be accurate only by ensuring the precision of the casing and the fixed part of the stator and the rotor, and more tolerance is avoided.

According to an embodiment of the present application, the electric machine comprises a stator assembly, which is the stator assembly described above, and a rotor assembly 8. The rotor assembly 8 includes a rotating shaft and permanent magnets fixed outside the rotating shaft.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present application is intended to cover various modifications, equivalent arrangements, and adaptations of the present application without departing from the spirit and scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A stator assembly, characterized by comprising a bridge (1) and at least two stator elements, wherein the stator elements comprise a core (2) and skeletons (3), the skeletons (3) are at least partially wrapped outside the core (2), the skeletons (3) of two adjacent stator elements are connected through the bridge (1), and the bridge (1) is separately formed and is fixedly connected with the skeletons (3) in a plug-fit manner; a slot (4) is formed in the end face, facing the bridge piece (1), of the connecting end of the framework (3), a guide rail (5) is arranged on the end face, facing the bridge piece (1), of the connecting end of the bridge piece (3), the guide rail (5) is inserted into the slot (4), the slot (4) is of a closing-up structure, and a section opening of the slot (4) shrinks along the direction far away from the bottom of the slot (4); the slot (4) extends along the length direction of the end face of the connecting end of the framework (3), a stopping step (10) is arranged at the tail end of the slot (4), and the tail end of the guide rail (5) is stopped on the stopping step (10);

the insertion groove (4) extends along the length direction of the end face of the connecting end of the framework (3), a stopping groove (11) is formed in the end portion of the insertion end of the insertion groove (4), a stopping block (12) is arranged on the guide rail (5), and after the guide rail (5) is inserted into the insertion groove (4), the stopping block (12) stops in the stopping groove (11); the core (2) is a C-shaped core.

2. A stator assembly according to claim 1, characterized in that the bridge (1) is in mortise and tenon engagement with the frame (3).

3. Stator assembly according to claim 1, characterized in that the bridge (1) is clearance fitted to the frame (3) and adhesively fixed.

4. The stator assembly according to claim 1, characterized in that the slots (4) extend in the length direction of the connection end face of the backbone (3) and extend through the backbone (3) in the extension direction.

5. Stator assembly according to claim 1, characterized in that the height of the stop step (10) in the direction of extension of the slot (4) is less than half the height of the backbone (3) in this direction.

6. Stator assembly according to claim 1, characterized in that the inner wall of the slot (4) is provided with a protrusion or a depression.

7. A stator assembly according to claim 1, characterized in that the bridge (1) is provided with a mounting slot (6), and a hall sensor (7) is mounted in the mounting slot (6).

8. A stator assembly according to claim 1, characterized in that the bridges (1) are made of a non-magnetic material.

9. An electrical machine comprising a stator assembly and a rotor assembly (8), characterized in that the stator assembly is a stator assembly according to any one of claims 1-8.