CN117639335A - Magnetic shoe holder, rotor, outer rotor motor and compressor - Google Patents

Abstract

The application belongs to the technical field of motors and provides a magnetic shoe retainer, a rotor, an outer rotor motor and a compressor. The magnetic shoe holder comprises an elastic piece, the elastic piece is pressed between two adjacent magnetic shoes, the elastic piece comprises an elastic body, a first pressing strip and a second pressing strip, the elastic body extends along the axial direction of the rotor, the elastic body is provided with a first elastic side and a second elastic side which are oppositely arranged, the first pressing strip is connected to the first elastic side, the second pressing strip is connected to the second elastic side, and the distance between the first pressing strip and the second pressing strip is gradually increased from one end of the elastic body to the direction of the other end of the elastic body. The utility model provides a magnetic shoe holder is through designing into the interval of first layering and second layering from the one end of elastomer towards the direction of the other end of elastomer increase gradually for the opposite both sides of elastic component have the draft angle respectively, can insert the elastic component between two adjacent magnetic shoes more easily like this, thereby effectively improved the assembly efficiency of external rotor motor.

Description

Magnetic shoe holder, rotor, outer rotor motor and compressor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a magnetic shoe retainer, a rotor, an outer rotor motor and a compressor.

Background

The compressor is used as a core component of refrigeration equipment, and the motor technology of the compressor has important influence on the working performance of the compressor, especially in the aspects of energy efficiency, noise, low-voltage starting, production cost and the like of the compressor. The external rotor motor has the outstanding advantages of strong starting capability, high energy efficiency, low material cost and the like due to the adoption of an external rotor structure, so that the external rotor motor is paid attention to by more and more compressor manufacturers.

The rotor of a conventional external rotor motor generally includes a yoke ring, a plurality of magnetic shoes, which are sequentially spaced apart along an inner circumferential wall of the yoke ring, and a plurality of magnetic shoe holders, which are pressed between two adjacent magnetic shoes to fix the respective magnetic shoes on the inner circumferential wall of the yoke ring. However, since the opposite elastic sides of the magnetic shoe holder are generally arranged in parallel, it is difficult for the magnetic shoe holder to be inserted between the adjacent two magnetic shoes, thereby increasing the difficulty of assembling the rotor and resulting in a decrease in the assembly efficiency of the outer rotor motor.

Disclosure of Invention

An aim of the embodiment of the application is to provide a magnetic shoe holder, a rotor, an outer rotor motor and a compressor, so as to solve the technical problem that in the prior art, the magnetic shoe holder is difficult to insert between two adjacent magnetic shoes due to parallel arrangement of two opposite elastic sides of the magnetic shoe holder, and then the assembly efficiency of the outer rotor motor is reduced.

In order to achieve the above purpose, the technical scheme adopted in the embodiment of the application is as follows: there is provided a magnetic shoe holder for fixing a magnetic shoe of a rotor, the magnetic shoe holder including an elastic member which is pressed against between two adjacent magnetic shoes, the elastic member including an elastic body which extends in an axial direction of the rotor, a first bead and a second bead, and the elastic body having a first elastic side and a second elastic side which are oppositely disposed, the first bead being connected to the first elastic side, and the first bead being for pressing against one of the magnetic shoes, the second bead being connected to the second elastic side, and the second bead being for pressing against the other magnetic shoe, a distance between the first bead and the second bead gradually increasing from one end of the elastic body toward the other end of the elastic body.

Optionally, the first pressing strip is provided with a first clamping groove for being clamped with the magnetic shoe, and the first clamping groove extends along the length direction of the first pressing strip; the second pressing strip is provided with a second clamping groove used for being clamped with the magnetic shoe, and the second clamping groove extends along the length direction of the second pressing strip.

Optionally, the magnetic shoe holder further includes a hook, where the hook is connected to the elastic element, and the hook is fastened to the yoke ring of the rotor.

Optionally, the magnetic shoe holder further comprises a limiting piece, and the limiting piece is used for propping against one side, away from the chassis of the rotor, of two adjacent magnetic shoes.

Optionally, the cross section of the elastomer is in an arc-shaped structure.

The magnetic shoe retainer provided by the application has the following beneficial effects: compared with the prior art, the magnetic shoe retainer of the application is designed to gradually increase from one end of the elastic body to the direction of the other end of the elastic body through the distance between the first pressing strip and the second pressing strip, so that the opposite sides of the elastic piece are respectively provided with the draft angles, when the rotor is assembled, the inserting end of the elastic piece is firstly inserted between two adjacent magnetic shoes, then the elastic piece is continuously inserted between the two adjacent magnetic shoes along the draft angles of the opposite sides of the elastic piece until the elastic piece is completely pressed between the two adjacent magnetic shoes, and therefore the elastic piece can be inserted between the two adjacent magnetic shoes more easily, the assembly difficulty of the rotor is effectively reduced, and the assembly efficiency of the outer rotor motor is effectively improved.

The application still provides a rotor, including yoke ring and a plurality of magnetic shoe, the rotor still includes a plurality of above-mentioned arbitrary embodiment the magnetic shoe holder, each the magnetic shoe is followed the interior circumferencial direction of yoke ring separates the setting in proper order, the elastic component is pressed and is leaned on between two adjacent magnetic shoes.

The rotor of the application can be inserted between two adjacent magnetic shoes more easily due to the adoption of the magnetic shoe retainer in any embodiment, so that the assembly difficulty of the rotor is effectively reduced, and the assembly efficiency of the outer rotor motor is effectively improved.

Optionally, the rotor further comprises a chassis, the chassis comprises a disc body and a shaft sleeve, the yoke ring is connected to the disc body, a first through hole is formed in the middle of the disc body, the shaft sleeve penetrates through the first through hole, and the shaft sleeve is fixedly connected with the disc body.

Optionally, the shaft sleeve comprises a sleeve and a flange plate connected to one end of the sleeve, the sleeve penetrates through the first through hole, and the flange plate is fixedly connected with the plate body.

Optionally, the tray body is provided with a sinking table, and the flange plate is arranged in the sinking table.

The application also provides an external rotor motor, comprising the rotor of any one of the embodiments.

The rotor of any one embodiment of the outer rotor motor is adopted, so that the assembly efficiency of the outer rotor motor is effectively improved.

The application also provides a compressor, which comprises the outer rotor motor.

The compressor of the application adopts the outer rotor motor in any embodiment, so that the assembly efficiency of the compressor is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an exploded construction of a compressor provided in an embodiment of the present application;

FIG. 2 is a schematic view of an exploded construction of a rotor in the compressor shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the magnetic shoe holder in the rotor shown in FIG. 2;

FIG. 4 is a schematic diagram of a front view of the magnetic shoe holder of FIG. 3;

fig. 5 is a schematic cross-sectional structure perpendicular to the axial direction of the rotor of the elastic member of the magnetic shoe holder shown in fig. 3.

Wherein, each reference sign in the figure:

100. an outer rotor motor;

110. a rotor;

111. a magnetic shoe holder; 1111. an elastic member; 11111. an elastomer; 11112. a first batten; 11113. a second pressing bar; 11114. a first elastic side; 11115. a second elastic side; 11116. an insertion end; 11117. a first clamping groove; 11118. a second clamping groove; 1112. a clamping hook; 1113. a limiting piece;

112. a magnetic shoe;

113. a yoke ring;

114. a chassis; 1141. a tray body; 11411. a first through hole; 11412. a second through hole; 1142. a shaft sleeve; 11421. a sleeve; 11422. a flange plate;

120. a stator;

200. a crankcase;

300. and (3) a crankshaft.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a 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 application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

A first aspect of the present application provides a magnetic shoe holder 111 for fixing magnetic shoes 112 of a rotor 110 to an inner peripheral wall of a yoke ring 113 of the rotor 110, and the magnetic shoe holder 111 provided in the embodiment of the present application will now be described with reference to the accompanying drawings.

Referring to fig. 1 to 4, the magnetic shoe holder 111 includes an elastic member 1111, the elastic member 1111 is pressed between two adjacent magnetic shoes 112, the elastic member 1111 includes an elastic member 11111, a first pressing bar 11112 and a second pressing bar 11113, the elastic member 11111 extends along an axial direction of the rotor 110 (an extending direction of a dashed line in fig. 4 is an axial direction of the rotor 110), the elastic member 11111 has a first elastic side 11114 and a second elastic side 11115 which are opposite to each other, the first pressing bar 11112 is connected to the first elastic side 11114, the first pressing bar 11112 is used for pressing against one magnetic shoe 112, the second pressing bar 11113 is connected to the second elastic side 11115, and the second pressing bar 11113 is used for pressing against the other magnetic shoe 112, a distance between the first pressing bar 11112 and the second pressing bar 11113 increases gradually from one end of the elastic member 11111 toward the other end of the elastic member 11111.

In use, the magnetic shoes 112 of the rotor 110 are sequentially spaced apart along the inner circumferential direction of the yoke ring 113 of the rotor 110, i.e. a gap is formed between two adjacent magnetic shoes 112, and the elastic members 1111 of each magnetic shoe holder 111 are inserted into the respective gaps one by one, so that the first pressing bar 11112 presses against one of the two adjacent magnetic shoes 112, and the second pressing bar 11113 presses against the other of the two adjacent magnetic shoes 112, so that the elastic members 1111 are compressed to generate elastic force, and the two adjacent magnetic shoes 112 are subjected to the elastic force of the elastic members 1111, thereby pressing each magnetic shoe 112 against the inner circumferential wall of the yoke ring 113 to fix each magnetic shoe 112 in the yoke ring 113.

Compared with the prior art, the magnetic shoe holder 111 provided by the application is designed to gradually increase the distance between the first pressing strip 11112 and the second pressing strip 11113 from one end of the elastic body 11111 towards the direction of the other end of the elastic body 11111, so that the opposite sides of the elastic piece 1111 are respectively provided with the draft angle, when the rotor 110 is assembled, the end with the smallest distance between the first pressing strip 11112 and the second pressing strip 11113 of the elastic piece 1111 is taken as the inserting end 11116, the inserting end 11116 of the elastic piece 1111 is firstly inserted between the two adjacent magnetic shoes 112, and then the elastic piece 1111 is continuously inserted between the two adjacent magnetic shoes 112 along the draft angle of the opposite sides of the elastic piece 1111 until the elastic piece 1111 is completely pressed between the two adjacent magnetic shoes 112, so that the elastic piece 1111 can be more easily inserted between the two adjacent magnetic shoes 112, thereby effectively reducing the assembling difficulty of the rotor 110 and effectively improving the assembling efficiency of the outer rotor motor 100. Meanwhile, the distance between the first pressing strip 11112 and the second pressing strip 11113 gradually increases from one end of the elastic body 11111 towards the other end of the elastic body 11111, so that the elastic force of one end, far away from the insertion end 11116, of the elastic member 1111, acting on the magnetic shoe 112 is larger than the elastic force of the insertion end 11116, acting on the magnetic shoe 112, and therefore the magnetic shoe 112 is effectively prevented from moving outwards along the axial direction of the rotor 110, and the use reliability of the magnetic shoe retainer 111 is effectively improved.

In one embodiment of the present application, referring to fig. 5, the first pressing bar 11112 has a first clamping groove 11117 for clamping with the magnetic shoe 112, and the first clamping groove 11117 extends along the length direction of the first pressing bar 11112; the second presser bar 11113 has a second engagement groove 11118 for engaging with the magnetic shoe 112, and the second engagement groove 11118 extends along the length direction of the second presser bar 11113. After the elastic member 1111 is inserted between two adjacent magnetic shoes 112, the side edge of one magnetic shoe 112 is clamped into the first clamping groove 11117, and the side edge of the other magnetic shoe 112 is clamped into the second clamping groove 11118, so that the radial position between the magnetic shoe holder 111 and the two adjacent magnetic shoes 112 is effectively limited, the magnetic shoe holder 111 is effectively prevented from being separated from the position between the two adjacent magnetic shoes 112 along the radial direction of the rotor 110, and the use reliability of the magnetic shoe holder 111 is effectively improved.

In an embodiment of the present application, referring to fig. 1 to 3 together, the magnetic shoe holder 111 further includes a hook 1112, the hook 1112 is connected to the elastic member 1111, and the hook 1112 is fastened to the yoke 113 of the rotor 110, it will be appreciated that the hook 1112 may be fastened to any portion of the yoke 113, such as an outer peripheral wall of the yoke 113, an end edge of the yoke 113, and so on. After the magnetic shoe holder 111 is pressed between two adjacent magnetic shoes 112, the clamping hooks 1112 are buckled on the yoke ring 113 of the rotor 110 to fixedly connect the magnetic shoe holder 111 with the yoke ring 113, and simultaneously the magnetic shoes 112 and the elastic members 1111 are abutted against each other under the elastic force of the elastic members 1111, so that the radial movement of the magnetic shoes 112 along the rotor 110 is effectively limited, the axial movement of the magnetic shoes 112 along the rotor 110 is also effectively limited, and the use reliability of the magnetic shoe holder 111 is effectively improved.

In the above embodiment, the hook portion of the hook 1112 is inclined toward the direction approaching the elastic member 1111, so that when the hook 1112 is fastened to the yoke ring 113, the hook portion of the hook 1112 can be pressed against the yoke ring 113, thereby effectively ensuring the connection stability of the magnetic shoe holder 111 and the yoke ring 113.

Specifically, the yoke ring 113 is provided with a plurality of bayonets (not shown in the figure), and the hook portions of the hooks 1112 are clamped in the bayonets, so that the connection stability of the magnetic shoe holder 111 and the yoke ring 113 is further improved.

In an embodiment of the present application, referring to fig. 1 to 3, the magnetic shoe holder 111 further includes a limiting member 1113, where the limiting member 1113 is used to abut against a side of two adjacent magnetic shoes 112 facing away from the chassis 114 of the rotor 110, so that the limiting member 1113 can effectively limit the magnetic shoes 112 to move along the axial direction of the rotor 110, thereby effectively improving the reliability of use of the magnetic shoe holder 111.

In an embodiment of the present application, referring to fig. 1 to 3, the magnetic shoe holder 111 further includes a hook 1112 and a limiting member 1113, the hook 1112 is connected to the elastic member 1111, the hook 1112 is fastened to the yoke 113 of the rotor 110, the limiting member 1113 is disposed on the hook 1112 or the elastic member 1111, and the limiting member 1113 is used to abut against one side of the two adjacent magnetic shoes 112 facing away from the chassis 114 of the rotor 110. After the magnetic shoe holder 111 is pressed between two adjacent magnetic shoes 112, the clamping hooks 1112 are buckled on the yoke ring 113 of the rotor 110 to fixedly connect the magnetic shoe holder 111 with the yoke ring 113, and simultaneously under the elastic force of the elastic piece 1111 and the limiting effect of the limiting piece 1113, the radial movement of the magnetic shoe 112 along the rotor 110 is effectively limited, and the axial movement of the magnetic shoe 112 along the rotor 110 is also effectively limited, so that the use reliability of the magnetic shoe holder 111 is effectively improved.

In one embodiment of the present application, referring to FIG. 5, the cross section of the elastomer 11111 is arcuate. After the elastic member 1111 is inserted between the adjacent two magnetic shoes 112, the elastic member 1111 is compressed such that the width of the arc structure becomes small, thereby causing the elastic member 1111 to generate elastic force acting on the magnetic shoes 112 to press each magnetic shoe 112 against the inner peripheral wall of the yoke ring 113 of the rotor 110.

In other embodiments, the cross-section of the elastic body 11111 is in a zigzag structure.

Referring to fig. 2, a second aspect of the present application provides a rotor 110 including a yoke ring 113, a plurality of magnetic shoes 112, and a plurality of the magnetic shoe holders 111 of any of the above embodiments, each of the magnetic shoes 112 being disposed at a spacing in order along an inner circumferential direction of the yoke ring 113, and an elastic member 1111 being pressed between the adjacent two of the magnetic shoes 112.

The rotor 110 of the present application, due to the adoption of the magnetic shoe holder 111 of any one of the embodiments, can more easily insert the magnetic shoe holder 111 between two adjacent magnetic shoes 112, and effectively reduces the assembly difficulty of the rotor 110, thereby effectively improving the assembly efficiency of the outer rotor motor 100.

In one embodiment of the present application, referring to fig. 2, the rotor 110 further includes a chassis 114, the chassis 114 includes a disc 1141 and a sleeve 1142, the yoke ring 113 is connected to the disc 1141, a first through hole 11411 is formed in a middle portion of the disc 1141, the sleeve 1142 is disposed through the first through hole 11411, and the sleeve 1142 is fixedly connected to the disc 1141. The chassis 114 of the conventional rotor 110 is generally designed integrally, and the shaft hole of the chassis 114 is generally a hole flanging, but because the protruding height of the hole flange of the hole flanging is smaller, after the shaft is in interference fit with the hole wall of the shaft hole, the contact area between the shaft and the hole wall of the shaft hole is smaller, so that the connection strength between the shaft and the chassis 114 is smaller, in order to increase the connection strength between the shaft and the chassis 114, the interference between the shaft and the hole wall of the shaft hole is often required to be increased, but the shaft hole is deformed, thereby greatly reducing the operation stability of the outer rotor motor 100. Compared with the prior art, the rotor 110 of the application is divided into the disc body 1141 and the shaft sleeve 1142 through the chassis 114, and the shaft sleeves 1142 with different specifications can be selected according to the assembly strength requirement of the rotating shaft, so that the length of the shaft sleeve 1142 can be matched with the assembly strength requirement of the rotating shaft, the contact area between the rotating shaft and the shaft sleeve 1142 is effectively increased, the connection strength between the rotating shaft and the chassis 114 is effectively improved, and the running stability of the outer rotor motor 100 is effectively improved.

In the above embodiment, referring to fig. 2, the sleeve 1142 includes a sleeve 11421 and a flange 11422 connected to one end of the sleeve 11421, the sleeve 11421 is penetrated through the first through hole 11411, the flange 11422 is fixedly connected with the disk body 1141, and is fixedly connected with the disk body 1141 through the flange 11422, so that the connection strength between the sleeve 1142 and the disk body 1141 is effectively improved, and the operation stability of the external rotor motor 100 is further improved.

It should be noted that the connection manner of the flange 11422 and the disk 1141 includes various manners, such as welding, fastening, and the like, which are not limited herein.

Specifically, the plate 1141 is provided with a sinking table (not shown), and the flange 11422 is disposed in the sinking table. It will be appreciated that the outer perimeter of flange 11422 is adapted to the inner perimeter of the sink deck, and that positioning flange 11422 on the sink deck effectively limits the position of flange 11422, thereby facilitating the connection of flange 11422 to plate 1141.

In an embodiment of the present application, referring to fig. 2, the disc 1141 is further provided with a plurality of second through holes 11412, and each of the second through holes 11412 is uniformly distributed along the circumferential direction of the disc 1141. When the external rotor motor 100 adopting the rotor 110 provided by the application is applied to a compressor, since the cooling oil in the compressor continuously circulates, during the rotation process of the rotor 110, the cooling oil can be discharged out of the rotor 110 through each second through hole 11412 under the centrifugal force effect, and meanwhile, the air flow can be discharged out of the rotor 110 through the second through holes 11412, so as to realize heat dissipation of the rotor 110.

Referring to fig. 1, a third aspect of the present application further provides an external rotor motor 100, including a rotor 110 according to any one of the above embodiments.

The outer rotor motor 100 of the present application adopts the rotor 110 of any one of the embodiments described above, so that the assembly efficiency of the outer rotor motor 100 is effectively improved.

Referring to fig. 1, a fourth aspect of the present application further provides a compressor including the above-mentioned external rotor motor 100.

The compressor of the present application adopts the outer rotor motor 100 of any one of the above embodiments, thereby effectively improving the assembly efficiency of the compressor.

Specifically, referring to fig. 1, the compressor further includes a crankcase 200 and a crankshaft 300, the external rotor motor 100 further includes a stator 120, the stator 120 is fixedly mounted on the crankcase 200, one end of the crankshaft 300 is rotatably mounted on the crankcase 200, and the other end of the crankshaft 300 passes through the stator 120 and is interference fit in a sleeve 1142 of the rotor 110.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (11)

1. A magnetic shoe holder for fixing a magnetic shoe of a rotor, characterized by: the magnetic shoe holder comprises an elastic piece, the elastic piece is pressed between two adjacent magnetic shoes, the elastic piece comprises an elastic body, a first pressing strip and a second pressing strip, the elastic body extends along the axial direction of the rotor, the elastic body is provided with a first elastic side and a second elastic side which are oppositely arranged, the first pressing strip is connected with the first elastic side and is used for pressing against one magnetic shoe, the second pressing strip is connected with the second elastic side and is used for pressing against the other magnetic shoe, and the distance between the first pressing strip and the second pressing strip is gradually increased from one end of the elastic body to the direction of the other end of the elastic body.

2. The magnetic shoe holder of claim 1, wherein: the first pressing strip is provided with a first clamping groove for clamping with the magnetic shoe, and the first clamping groove extends along the length direction of the first pressing strip; the second pressing strip is provided with a second clamping groove used for being clamped with the magnetic shoe, and the second clamping groove extends along the length direction of the second pressing strip.

3. The magnetic shoe holder of claim 1, wherein: the magnetic shoe retainer further comprises a clamping hook which is connected to the elastic piece, and the clamping hook is buckled on the yoke ring of the rotor.

4. The magnetic shoe holder of claim 1, wherein: the magnetic shoe retainer further comprises a limiting piece, wherein the limiting piece is used for propping against one side, away from the chassis of the rotor, of each two adjacent magnetic shoes.

5. A magnetic shoe holder as claimed in any one of claims 1 to 4 wherein: the cross section of the elastic body is of an arc-shaped structure.

6. A rotor comprising a yoke ring and a plurality of magnetic shoes, characterized in that: the rotor further comprises a plurality of the magnetic shoe holders according to any one of claims 1 to 5, each of the magnetic shoes being disposed at a spacing in order along an inner circumferential direction of the yoke ring, the elastic member being pressed between two adjacent magnetic shoes.

7. A rotor as defined in claim 6, wherein: the rotor further comprises a chassis, the chassis comprises a disc body and a shaft sleeve, the yoke ring is connected to the disc body, a first through hole is formed in the middle of the disc body, the shaft sleeve penetrates through the first through hole, and the shaft sleeve is fixedly connected with the disc body.

8. A rotor as claimed in claim 7, wherein: the shaft sleeve comprises a sleeve and a flange plate connected to one end of the sleeve, the sleeve penetrates through the first through hole, and the flange plate is fixedly connected with the plate body.

9. A rotor as claimed in claim 8, wherein: the disk body is equipped with the platform that sinks, the ring flange set up in sink the bench.

10. An external rotor motor, characterized in that: the external rotor motor comprising a rotor according to any one of claims 6-9.

11. A compressor, characterized in that: the compressor comprising the outer rotor motor of claim 10.