CN111313592B

CN111313592B - Electric machine

Info

Publication number: CN111313592B
Application number: CN202010142338.6A
Authority: CN
Inventors: 梁斌; 文俊书; 韦岩; 曾文锋
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2021-09-24
Anticipated expiration: 2040-03-03
Also published as: CN111313592A

Abstract

The present invention provides a motor, comprising: the shell comprises a spigot and an end cover for closing the spigot; the first fixing assembly comprises a first part and a second part which are respectively positioned on the end cover and the shell and are matched with each other, the first part and the second part are mutually abutted, so that the first part and the second part are relatively static in a first direction, the first direction is parallel to the central axis of the shell, and the first direction is directed to the end cover from the shell; and the second fixing component comprises a first split body and a second split body which are respectively positioned on the end cover and the shell and are matched with each other, the first split body and the second split body are mutually abutted, so that the first split body and the second split body are relatively static in a second direction, and the second direction is parallel to the rotating direction of the rotor in the shell. Even if an interference fit assembly mode is not adopted, the stability of the fit of the shell and the end cover in the running process of the motor can be ensured. Further eliminating the problem that the disassembly is easy to damage due to interference fit.

Description

Electric machine

Technical Field

The invention relates to the technical field of motor structures, in particular to a motor.

Background

The plastic package motor is a motor which integrally packages a stator core, a winding and the like of the motor by engineering plastics by adopting a plastic package technology.

The plastic package motor comprises a shell, wherein one end of the shell and a stator inside the shell form a whole in a plastic injection molding mode through a plastic package material, so that the shell, the stator and one end of the plastic package are integrated. The other end of the housing is a spigot, typically closed by an end cap.

Because the motor can shake in the course of working, in order to guarantee the end cap keeps the closed condition. Therefore, the binding force between the end cover and the shell needs to meet certain requirements, and the end cover is prevented from loosening caused by vibration in the working process of the motor.

Therefore, the end cover is assembled at the spigot end of the shell through two working procedures of prepressing and riveting by an oil press, the end cover and the shell can be aligned through the prepressing, and the end cover can be extruded on the outer side wall of the shell through the riveting working procedure. Usually in order to realize the stable connection of end cover, need adopt end cover interference fit's mode, foretell operating method is comparatively loaded down with trivial details, simultaneously because adopt interference fit's mode, often can only violently disassemble when the end cover is dismantled to needs, very easily causes the damage of end cover.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the assembly process of the end cover of the plastic package motor is complex and the end cover is easy to damage after being disassembled in the prior art, thereby providing the motor.

An electric machine comprising:

the shell comprises a spigot and an end cover for closing the spigot;

a first securing assembly including first and second cooperating portions on the end cap and the housing, respectively, the first and second portions interfering with each other such that the first and second portions are relatively stationary in a first direction, the first direction being parallel to a central axis of the housing and the first direction being directed from the housing toward the end cap;

the second fixing assembly comprises a first split body and a second split body which are respectively positioned on the end cover and the shell and are matched with each other, the first split body and the second split body are mutually abutted, so that the first split body and the second split body are relatively static in a second direction, and the second direction is parallel to the rotating direction of the rotor in the shell.

The first part comprises an anti-locking protrusion arranged on a flange of the end cover, the anti-locking protrusion protrudes away from the flange, and the second part comprises an anti-locking groove arranged on the spigot.

The first portion further comprises:

the guide groove is arranged on the outer peripheral surface of the spigot, and the anti-locking groove is arranged in the guide groove.

The guide groove includes:

the guide projection is convexly arranged in the guide groove and comprises a first guide surface, and the first guide surface inclines towards the opening direction of the anti-locking groove from the opening of the guide groove.

The guide projection further includes:

and the second guide surface inclines from the opening of the anti-locking groove to the peripheral surface direction of the spigot.

The anti-lock slot includes:

the inclined plane is close to the guide convex block is arranged, one end of the inclined plane is connected with the bottom of the reverse lock groove, and the other end of the inclined plane inclines towards the second guide surface.

The counter-lock slot is located downstream of the guide lug in a second direction.

The first sub-body comprises a buckle arranged on the end cover, the buckle extends towards the direction of the shell, and the second sub-body comprises a clamping groove arranged on the peripheral surface of the shell.

When the first part and the second part are mutually butted, the buckle is just clamped and embedded in the clamping groove.

The buckle includes:

and the rotation stopping protrusion is protruded on the buckle along the direction vertical to the first direction.

The draw-in groove includes the locking step face, the protruding conflict of splining the locking step face, the locking step face is located splining bellied first direction.

The buckle has elasticity.

The technical scheme of the invention has the following advantages:

1. the present invention provides a motor, comprising: the shell comprises a spigot and an end cover for closing the spigot; a first securing assembly including first and second cooperating portions on the end cap and the housing, respectively, the first and second portions interfering with each other such that the first and second portions are relatively stationary in a first direction, the first direction being parallel to a central axis of the housing and the first direction being directed from the housing toward the end cap; the second fixing assembly comprises a first split body and a second split body which are respectively positioned on the end cover and the shell and are matched with each other, the first split body and the second split body are mutually abutted, so that the first split body and the second split body are relatively static in a second direction, and the second direction is parallel to the rotating direction of the rotor in the shell.

During operation of the motor, the end cap has a tendency to rotate in the direction of rotation of the rotor, i.e., the second direction, due to the continued rotation of the inner rotor. In the scheme, the first split body and the second split body are matched with each other to prevent the first split body and the second split body from being separated from each other in the second direction, so that the end cover and the shell are prevented from rotating and loosening due to the influence of the rotation of the rotor. On the other hand, because the first and second components are mutually abutted in the second direction, the first and second components do not move relatively in the second direction, and can be kept in a tightly abutted state under the influence of the rotation of the rotor in the working process of the motor. The first part and the second part are matched and abutted to prevent the end cover from moving away from the shell, so that the end cover is prevented from loosening in the central shaft direction of the shell. Therefore, this scheme prevents to take place to rotate in the end cover working process not hard up and prevent that end cover and casing from taking place not hard up that breaks away from each other through the two sets of structures of the fixed subassembly of first fixed subassembly and second cooperate jointly, even do not adopt interference fit's among the prior art assembly method, also can guarantee casing and end cover at the cooperation stability of motor operation in-process. Further eliminating the problem that the disassembly is easy to damage due to interference fit.

2. According to the motor provided by the invention, the first part comprises the anti-locking protrusion arranged on the flange of the end cover, the anti-locking protrusion protrudes away from the flange, and the second part comprises the anti-locking groove arranged on the spigot.

The anti-locking groove is mutually matched with the anti-locking protrusion, and the inner wall of the anti-locking groove on the first direction is in conflict with the anti-locking protrusion, so that the end cover is prevented from being opened along the first direction.

3. The invention provides a motor, the first part further comprises: the guide groove is arranged on the outer peripheral surface of the spigot, and the anti-locking groove is arranged in the guide groove.

The guide way is advanced into to the back-locking protrusion, and then gets into the back-locking groove by the guide way guide, makes things convenient for the faster location gomphosis in back-locking protrusion and back-locking groove to further accelerate the faster location assembly of casing and end cover.

4. The invention provides a motor, wherein the guide groove comprises: the guide projection is convexly arranged in the guide groove and comprises a first guide surface, and the first guide surface inclines towards the opening direction of the anti-locking groove from the opening of the guide groove.

The first guide surface supports and guides the locking projection to slide into the locking groove for positioning.

5. The invention provides a motor, the guide projection further comprises: and the second guide surface inclines from the opening of the anti-locking groove to the peripheral surface direction of the spigot.

When the motor needs to be dismantled, with the end cover along the antiport of second direction, rotate the in-process and lock the arch along second spigot roll-off guide way, contact with the tang peripheral face, make first portion and second portion alternate segregation, make the end cover can open along first direction.

6. The invention provides a motor, wherein the anti-locking groove comprises: the inclined plane is close to the guide convex block is arranged, one end of the inclined plane is connected with the bottom of the reverse lock groove, and the other end of the inclined plane inclines towards the second guide surface.

The inclined surface is used for guiding the counter locking protrusion to quickly disengage from the counter locking groove and enter the second guide surface when the counter locking protrusion rotates along the second direction in the reverse direction.

7. According to the motor provided by the invention, the anti-locking groove is positioned at the downstream of the guide lug in the second direction.

When the end cover needs to be opened, the end cover is rotated in the reverse direction of the second direction, so that the counter locking protrusion slides out along the inclined surface and the second guide surface in sequence.

8. According to the motor provided by the invention, the first split body comprises a buckle arranged on the end cover, the buckle extends towards the direction of the shell, and the second split body comprises a clamping groove arranged on the peripheral surface of the shell.

When the end cover is buckled on the spigot, the buckle is mutually matched with the clamping groove on the peripheral surface of the shell from the outer side direction of the shell, so that the end cover and the shell are prevented from rotating relatively.

9. According to the motor provided by the invention, when the first part and the second part are mutually abutted, the buckle is just clamped and embedded in the clamping groove.

When the anti-protruding entering guide way that just gets into of locking, the buckle is just to the casing outer peripheral face, and when the anti-protruding emergence of locking was slided by first spigot guide effect, take place relative rotation between end cover and the tang, the buckle that is located on the end cover also takes place to rotate thereupon, and the draw-in groove is located the direction of rotation of buckle, therefore when the anti-protruding and anti-draw-in groove of locking mutually supports, the buckle just realizes mutually supporting with the draw-in groove.

10. The invention provides a motor, wherein the buckle comprises: and the rotation stopping protrusion is protruded on the buckle along the direction vertical to the first direction.

The inner wall of the clamping groove is attached to the side wall in the width direction of the buckle, and the buckle is prevented from rotating along the positive rotation or the reverse rotation direction of the end cover. The mechanical strength of buckle can be increased to the arch of splining, improves the stability of the two cooperation structures of draw-in groove and buckle.

11. According to the motor provided by the invention, the clamping groove comprises a stop step surface, the rotation stopping protrusion abuts against the stop step surface, and the stop step surface is positioned in the first direction of the rotation stopping protrusion.

The rotation stopping protrusion can be matched with the stopping step surface to prevent the end cover and the shell from moving in a separating mode in the first direction, and the bonding strength of the second fixing component is further enhanced.

12. According to the motor provided by the invention, the buckle has elasticity.

When the end cover is detached and opened, the buckle is warped out of the clamping groove through external force, and meanwhile, the end cover rotates reversely along the second direction. And continuing to rotate the end cover to enable the locking protrusions and the locking grooves to be separated from each other, so that the end cover is detached.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the housing structure of the present invention;

FIG. 2 is a schematic view of the end cap construction of the present invention;

FIG. 3 is a schematic view of a slot structure on the outer peripheral surface of the housing according to the present invention;

FIG. 4 is a schematic view showing the structure of a guide groove formed on the outer peripheral surface of the spigot of the present invention;

FIG. 5 is a schematic view of the inside locking protrusion structure of the end cap of the present invention.

Description of reference numerals:

1. a housing; 11. a housing peripheral surface; 12. a card slot; 13. a stop step surface; 2. stopping the opening; 21. a spigot peripheral surface; 22. an anti-lock slot; 23. an inclined surface; 3. a guide groove; 31. a first guide surface; 32. a second guide surface; 4. an end cap; 41. a back locking protrusion; 5. buckling; 51. and a rotation stopping protrusion.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a motor, as shown in fig. 1 and 2, including: the shell body 1 comprises a spigot 2 and an end cover 4 for closing the spigot 2; a first fixing assembly comprising a first part and a second part which are respectively arranged on the end cover 4 and the shell 1 and are mutually matched, wherein the first part and the second part are mutually interfered, so that the first part and the second part are relatively static in a first direction, the first direction is parallel to the central axis of the shell 1, and the first direction is directed to the end cover 4 from the shell 1; the second fixing assembly comprises a first split body and a second split body which are respectively positioned on the end cover 4 and the shell 1 and are matched with each other, the first split body and the second split body are mutually abutted, so that the first split body and the second split body are relatively static in a second direction, and the second direction is parallel to the rotating direction of the rotor in the shell 1. During operation of the motor, the end cap 4 has a tendency to rotate in the direction of rotation of the rotor, i.e. the second direction, due to the continuous rotation of the inner rotor. In the scheme, the first split body and the second split body are matched with each other to prevent the first split body and the second split body from being separated from each other in the second direction, so that the end cover 4 and the shell 1 are prevented from being rotationally loosened due to the influence of the rotation of the rotor. On the other hand, because the first and second components are mutually abutted in the second direction, the first and second components do not move relatively in the second direction, and can be kept in a tightly abutted state under the influence of the rotation of the rotor in the working process of the motor. The first and second parts are in interference fit to prevent the end cap 4 from moving away from the housing 1, thereby preventing the end cap 4 from loosening in the direction of the central axis of the housing 1. Therefore, this scheme prevents to rotate in the 4 course of operation of end cover not hard up and prevent that end cover 4 and casing 1 from taking place not hard up that breaks away from each other through the two sets of structures of the fixed subassembly of first fixed subassembly and second cooperate jointly, even do not adopt interference fit's assembly method, also can guarantee casing 1 and end cover 4 at the cooperation stability of motor operation in-process. Further eliminating the problem that the disassembly is easy to damage due to interference fit.

As shown in fig. 1, one end of the housing 1 is closed, and the other end is opened to form a spigot 2, and the inner surface of the spigot 2 facing the inside of the housing 1 and the inner wall of the housing 1 are located on the same circumferential surface. The spigot 2 further comprises a spigot outer peripheral surface 21, and since the outer peripheral radius of the spigot 2 is smaller than the outer peripheral radius of the cross section of the housing 1, a step surface is formed between the spigot outer peripheral surface 21 and the housing outer peripheral surface 11. Alternatively, the outer peripheral surface 21 of the spigot is on the same peripheral surface as the outer peripheral surface 11 of the housing, and the distance from the inner wall of the structure surrounded by the spigot 2 to the central axis of the housing 1 is greater than the distance from the inner wall of the housing 1 to the central axis of the housing 1, so that a step surface is formed between the inner wall of the spigot 2 and the inner wall of the housing 1. The step surface is now located inside the housing 1.

Referring to fig. 2, the end cap 4 has a flange corresponding to the step surface of the housing 1, and when the end cap 4 is assembled to the housing 1, the flange of the end cap 4 includes the spigot 2, and the flange of the end cap 4 corresponds to the space between the spigot peripheral surface 21 and the housing peripheral surface 11. As an alternative embodiment, the step surface is located inside the housing 1 and the flange of the end cap 4 is wrapped by the spigot 2.

The structure of the end cover 4 is not particularly limited, and in the present embodiment, as shown in fig. 2, the first portion includes an anti-lock projection 41 provided on the flange of the end cover 4, the anti-lock projection 41 projects toward the center of the end cover 4, the second portion includes an anti-lock groove 22 provided on the spigot 2, and a side wall of the anti-lock groove 22 is disposed in front of the movement path of the end cover 4 in the first direction. The side wall acts on the front of the first path to avoid the end cap 4 from falling out, and at this time, 41 may act on the bottom wall of 22, or may be spaced from the bottom wall of 22 by a certain distance, and the length of 41 itself is only required to ensure that it acts below the side wall of the groove 22. As an alternative embodiment, the step surface is located inside the housing 1, the locking projections 41 project outside the range enclosed by the flanges, and the locking grooves 22 are located inside the spigot 2 and are matched with the locking projections 41.

Wherein, in the embodiment, the protrusion 41 is disposed on the housing 4, the slot 3 is disposed on the housing, and the first portion is the protrusion, and the second portion is the slot 2, the side wall of the slot will act on the front of the protrusion to limit the movement of the protrusion 41. The projection 41 is provided on the housing and the slot 3 is provided on the end cap 4, in which case the first part is the projection and the second part is the slot 2, the projection acting in front of the side wall of the slot 2 to restrict the movement of the slot 2.

As shown in fig. 1 and 4, the first portion further includes: the guide groove 3 is arranged on the outer peripheral surface 21 of the spigot, and the anti-locking groove 22 is arranged in the guide groove 3. The locking protrusion 41 firstly enters the guide groove 3 and then enters the locking groove 22 under the guidance of the guide groove 3, so that the locking protrusion 41 and the locking groove 22 can be conveniently positioned and embedded, and the positioning and assembling of the shell 1 and the end cover 4 can be further accelerated. As an alternative, the groove 3 itself may also be a groove parallel to the first direction, in which case the end cap need not be rotated during installation, but only in the axial direction of the housing.

In this embodiment, referring to fig. 1 and 4, the guide groove 3 includes: the guide projection is convexly arranged in the guide groove 3 and comprises a first guide surface 31, and the first guide surface 31 inclines from the opening of the guide groove 3 to the opening direction of the anti-locking groove 22. The first guide surface 31 supports and guides the locking projection 41 to slide into the locking groove 22 for positioning. Wherein the size of the opening may gradually decrease, as shown in fig. 1, or may gradually increase. When progressively decreasing, the end cap 4 itself undergoes a clockwise rotation, and when progressively increasing, the end cap 4 undergoes a counter-clockwise rotation.

As shown in fig. 4, the guide protrusion further includes: and a second guide surface 32 inclined from the opening of the lock groove 22 toward the spigot outer peripheral surface 21. When the motor needs to be disassembled, the end cover 4 is rotated along the reverse direction of the second direction, the locking protrusion 41 slides out of the guide groove 3 along the second guide surface 32 in the rotating process and contacts with the outer peripheral surface 21 of the spigot, so that the first part and the second part are separated from each other, and the end cover 4 can be opened along the first direction.

The structure of the back locking groove 22 is not particularly limited, and in the present embodiment, as shown in fig. 4, the back locking groove 22 includes: and the inclined surface 23 is arranged close to the guide projection, one end of the inclined surface 23 is connected with the bottom of the anti-locking groove 22, and the other end of the inclined surface inclines towards the second guide surface 32. The inclined surface 23 serves to guide the counter lock protrusion 41 to be more quickly separated from the counter lock groove 22 into the second guide surface 32 when the counter lock protrusion is rotated in the reverse direction of the second direction. As an alternative embodiment, the side wall of the counter lock groove 22 on the side close to the guide projection is perpendicular to the groove bottom of the counter lock groove 22. The inclination angle of the inclined surface 23 is not particularly limited, and in the present embodiment, the angle between the inclined surface 23 and the bottom of the counter lock groove 22 is in the range of (0 °, 90 °).

In this embodiment, as shown in fig. 1 and 4, the anti-lock groove 22 is located downstream of the guide projection in the second direction. When it is desired to open the end cap 4, the end cap 4 is rotated in the second direction to slide the locking projections 41 out along the inclined surfaces 23 and the second guide surfaces 32 in sequence.

With reference to fig. 3 and 5, the first sub-body includes a buckle 5 disposed on the end cap 4, the buckle 5 extends toward the housing 1, and the second sub-body includes a slot 12 disposed on the outer peripheral surface 11 of the housing. When the end cap 4 is buckled on the spigot 2, the buckle 5 is matched with the clamping groove 12 on the outer peripheral surface 11 of the shell from the outer side direction of the shell 1, so that the end cap 4 and the shell 1 are prevented from rotating relatively.

The position relationship between the first fixing component and the second fixing component is not particularly limited, and in this embodiment, as shown in fig. 1, 3, and 4, when the first portion and the second portion are abutted against each other, the buckle 5 is just inserted into the slot 12. When the reverse locking protrusion 41 just enters the guide groove 3, the buckle 5 is just opposite to the outer peripheral surface 11 of the shell, when the reverse locking protrusion 41 slides under the guiding action of the first guide surface 31, the end cover 4 and the spigot 2 rotate relatively, the buckle 5 on the end cover 4 also rotates accordingly, and the clamping groove 12 is located in the rotating direction of the buckle 5, so that when the reverse locking protrusion 41 and the reverse locking groove 22 are mutually matched, the buckle 5 is just matched with the clamping groove 12. As an alternative embodiment, the second assembly may be replaced by a bolt assembly, after the positioning of the first and second parts is completed, the end cap 4 and the housing 1 are further positioned with bolts in a direction perpendicular to the first direction.

Wherein, as shown in fig. 2 and 3, the buckle 5 includes: and a rotation stop protrusion 51 protruding on the catch 5 in a direction perpendicular to the first direction. The inner wall of the clamping groove 12 is attached to the side wall of the buckle 5 in the width direction, and the buckle 5 is prevented from rotating in the forward rotation direction or the reverse rotation direction of the end cover 4. The rotation stopping protrusion 51 can increase the mechanical strength of the buckle 5 and improve the stability of the matching structure of the clamping groove 12 and the buckle 5.

In this embodiment, as shown in fig. 1 and 3, the card slot 12 includes a stop step surface 13, the rotation stop protrusion 51 abuts against the stop step surface 13, and the stop step surface 13 is located in the first direction of the rotation stop protrusion 51. The rotation stop protrusion 51 can also cooperate with the stop step surface 13 to prevent the end cap 4 from moving away from the housing 1 in the first direction, thereby further enhancing the bonding strength of the second fixing member.

In this embodiment, as shown in fig. 2, the clip 5 has elasticity. When the end cover 4 is opened in needs dismantlement, at first perk buckle 5 card groove 12 through external force to simultaneously along the antiport end cover 4 of second direction, because buckle 5 has elasticity, consequently at the in-process with 5 perk of buckle draw-in grooves 12, buckle 5 takes place elastic deformation and can not the fracture. The end cap 4 is removed by continuing to rotate the end cap 4 to disengage the lock-back protrusions 41 from the lock-back grooves 22.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An electric machine, comprising:

a housing (1) comprising a spigot (2) and an end cap (4) for closing the spigot (2);

-a first fixing assembly comprising a first and a second cooperating part on the end cap (4) and the housing (1), respectively, one of which acts in front of the path of movement of the other towards a first direction parallel to the central axis of the housing (1) and directed from the housing (1) towards the end cap (4);

the first part comprises an anti-locking protrusion (41) arranged on a flange of the end cover (4), the anti-locking protrusion (41) protrudes towards the center direction of the end cover (4), the second part comprises an anti-locking groove (22) arranged on the spigot (2), and the side wall of the anti-locking groove (22) is arranged in front of the movement path of the end cover (4) along the first direction;

the first portion further comprises: the guide groove (3) is arranged on the outer peripheral surface (21) of the spigot, and the anti-locking groove (22) is arranged in the guide groove (3) and is positioned in front of the extension direction of the guide groove;

the guide groove (3) includes:

the guide convex block is convexly arranged in the guide groove (3) and comprises a first guide surface (31), the first guide surface (31) inclines towards the opening direction of the anti-locking groove (22) from the opening of the guide groove (3), and the end cover (4) is suitable for rotating along the first guide surface (31) in a second direction parallel to the rotating direction of the rotor in the shell (1) and enters the anti-locking groove (22);

the guide projection further includes:

a second guide surface (32) inclined from the opening of the lock groove (22) toward the spigot outer peripheral surface (21);

the second fixing assembly comprises a first split body and a second split body which are respectively positioned on the end cover (4) and the shell (1) and are matched with each other, and the first split body and the second split body are mutually abutted to enable the first split body and the second split body to be relatively static in the circumferential direction of the shell (1).

2. The electric machine according to claim 1, characterized in that the anti-lock slot (22) comprises:

inclined plane (23), be close to the guide projection setting, inclined plane (23) one end is connected anti-locked groove (22) bottom, the other end to second spigot surface (32) direction slope, anti-locked groove (22) are located the rear position of second direction.

3. The machine according to claim 2, characterized in that the first part comprises a catch (5) provided on the end cap (4), the catch (5) being resilient and extending in the direction of the housing (1), and the second part comprises a catch (12) provided on the outer circumferential surface (11) of the housing.

4. A machine as claimed in claim 3, characterized in that, when said first and second portions interfere with each other, the side walls of said catch (5) abut against the side walls of said slot (12).

5. The electric machine according to claim 4, characterized in that the catch (5) comprises:

a rotation stop protrusion (51) protruding on the catch (5) in a direction perpendicular to the first direction.

6. The electric machine according to claim 5, wherein the catch (12) comprises a stop step surface (13), the rotation stop protrusion (51) abutting against the stop step surface (13), the stop step surface (13) being located in a first direction of the rotation stop protrusion (51).