CN218678637U

CN218678637U - End cover, motor and electric equipment

Info

Publication number: CN218678637U
Application number: CN202223315668.4U
Authority: CN
Inventors: 刘也; 郭丙春
Original assignee: Foshan Welling Washer Motor Manufacturing Co Ltd; Huaian Welling Motor Manufacturing Co Ltd
Current assignee: Foshan Welling Washer Motor Manufacturing Co Ltd; Huaian Welling Motor Manufacturing Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-21
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses an end cover, motor and electric equipment, wherein the end cover, including the casing, the casing is the panel beating finished piece, and the casing is including diapire and lateral wall, and the lateral wall encircles the diapire setting, and the diapire is provided with the bearing frame, and the terminal surface that the lateral wall deviates from the diapire is provided with a plurality of installation departments and a plurality of fretwork portion, and a plurality of installation departments and a plurality of fretwork portion all set up along the circumference interval of lateral wallThe projection of the hollow part on the axial section of the side wall is a curve; wherein, along the axial of bearing frame, the minimum distance between interior bottom surface and the fretwork portion of bearing frame is H1, and the distance between interior bottom surface and the installation department of bearing frame is H2, along the radial of bearing frame, the minimum internal diameter of lateral wall is D1, and the biggest external diameter that a plurality of installation departments formed is D2, satisfies:

the utility model discloses an end cover can reduce the cutting size, improves the utilization ratio of material, reduces manufacturing cost.

Description

End cover, motor and electric equipment

Technical Field

The utility model relates to the technical field of electrical apparatus, in particular to end cover, motor and electrical equipment.

Background

The motor comprises a stator, a rotor and an end cover, wherein the stator and the rotor are arranged in the end cover, the existing end cover is mainly manufactured through a sheet metal process, the material spreading of the end cover is usually irregular in shape, but the end cover can be cut into a regular shape when being cut, and then redundant parts are cut off, so that the size of the cut material of the end cover is larger, the utilization rate of the material is reduced, and the manufacturing cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an end cover can reduce the size of cutting the material, improves the utilization ratio of material, reduces manufacturing cost.

The utility model discloses provide a motor with above-mentioned end cover simultaneously.

The utility model discloses still provide an electrical equipment who has above-mentioned motor simultaneously.

The end cover comprises a shell, the shell is a sheet metal part, the shell comprises a bottom wall and a side wall, the side wall is arranged around the bottom wall, the bottom wall is provided with a bearing seat, the end face, away from the bottom wall, of the side wall is provided with a plurality of installation parts and a plurality of hollow parts, the installation parts and the hollow parts are arranged at intervals along the circumferential direction of the side wall, and the projection of the hollow parts on the axial section of the side wall is a curve; wherein, follow the axial of bearing frame, the interior bottom surface of bearing frame with the minimum distance between the fretwork portion is H1, the interior bottom surface of bearing frame with the distance between the installation department is H2, follows the bearingThe radial of seat, the minimum internal diameter of lateral wall is D1, and is a plurality of the biggest external diameter that the installation department formed is D2, satisfies:

according to the utility model discloses end cover of first aspect embodiment has following beneficial effect at least: the lateral wall encircles and sets up on the diapire, the diapire is provided with the bearing frame, the bearing frame is used for installing the bearing, the terminal surface that the lateral wall deviates from the diapire is provided with a plurality of installation departments and a plurality of fretwork portions, wherein, according to minimum diameter D1 of lateral wall, the minimum distance H1 of interior bottom surface to fretwork portion of bearing frame and the distance H2 of bearing frame to installation department set for the maximum diameter D2 that a plurality of installation departments formed, the maximum diameter D2 that makes a plurality of installation departments form satisfies

The maximum diameter D2 that can avoid a plurality of installation departments to form is too big, makes the cutting size that can reduce the casing, reduces the cutting volume of panel, improves the utilization ratio of material, reduces the manufacturing cost of end cover.

According to some embodiments of the first aspect of the present invention, the projection of the hollowed-out portion on the axial section of the side wall is a parabola.

According to some embodiments of the first aspect of the present invention, the installation department with the quantity of fretwork portion all is provided with 4, follows the circumference of lateral wall, the installation department with the fretwork portion sets up in a staggered way.

According to the utility model discloses motor of second aspect embodiment, including stator part, rotor part and two the utility model discloses the end cover of first aspect embodiment, two end cover fixed connection is in stator part's axial both ends, stator part centers on the rotor part, the rotor part is including the pivot, the pivot is passed through the bearing and is connected the bearing frame.

According to the utility model discloses motor of second aspect embodiment has following beneficial effect at least: two end covers fixed connection are at the axial both ends of stator part, and the pivot passes through the bearing to be connected at the bearing frame, and the messenger can make things convenient for the assembly of motor, reduces the equipment degree of difficulty of motor, reduces the manufacturing cost of motor.

According to some embodiments of the second aspect of the present invention, the side wall deviates from the one end inner wall of the bottom wall is provided with a plurality of bearing portions, a plurality of the bearing portions are along the circumferential interval of the side wall is arranged, the stator component is arranged in a plurality of the bearing portions.

According to some embodiments of the second aspect of the present invention, the radial profile projection of the side wall of the contact surface of the stator component with the bearing portion is a circular arc line.

According to some embodiments of the second aspect of the present invention, the distance between the inner bottom surface of the bearing seat and the stator part is H3, satisfying: h2 > H3.

According to the utility model discloses some embodiments of second aspect, a plurality of first through-holes have been seted up to the diapire, and is a plurality of first through-hole encircles the bearing frame interval sets up.

According to the utility model discloses some embodiments of second aspect, a plurality of second through-holes have been seted up to the lateral wall, and is a plurality of second through-hole interval sets up.

According to the utility model discloses electric equipment of third aspect embodiment, include the utility model discloses motor of second aspect embodiment, electric equipment has the utility model discloses all beneficial effects of second aspect embodiment motor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of an end cap according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an end cap according to an embodiment of the first aspect of the present invention;

fig. 3 is a top view of an end cap according to an embodiment of the present invention;

fig. 4 is an isometric view of an end cap according to an embodiment of the first aspect of the present invention;

fig. 5 is a schematic view of a material spreading of an end cap according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electric machine according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6;

fig. 8 is an exploded schematic view of a motor according to an embodiment of the present invention.

The reference numbers are as follows:

the bearing comprises a shell 100, a bottom wall 110, a bearing seat 111, a first through hole 112, a convex rib 113, a side wall 120, an installation part 121, a hollow part 122, a bearing part 123 and a second through hole 124;

stator part 210, rotor part 220, rotating shaft 221, fastener 230.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The existing motor mainly comprises a stator, a rotor and an end cover, wherein the rotor is rotatably arranged in the stator, the end cover is mainly used for forming a containing cavity for containing the stator and the rotor, namely the end cover needs to meet the functions of installation, connection and the like of all parts, so that the structure of the end cover needs to adapt to the installation size of the parts, the appearance structure of the end cover is relatively complex, the existing end cover is mainly manufactured through a sheet metal process, the materials spread out of the end cover are usually irregular in shape, but the materials spread out of the end cover are mainly formed by cutting a plate into a regular shape through a shearing machine and then cutting the plate into the shape of the materials spread out and needed by the end cover, the redundant part of the plate needs to be cut out in the processing mode so as to be convenient for processing and manufacturing the end cover, but the cut-out part of the plate is difficult to reuse, the utilization rate of the plate is reduced, and the manufacturing cost of the end cover is increased.

Based on this, the utility model discloses the embodiment of the first aspect provides an end cover, can improve the utilization ratio of material, reduces the size of cutting the material, reduces the manufacturing cost of end cover.

The following description is made with reference to the accompanying drawings:

referring to fig. 1 to 4, an embodiment of the first aspect of the present invention provides an end cap, including a housing 100, the housing 100 is a sheet metal part, the housing 100 includes a bottom wall 110 and a side wall 120, the side wall 120 is disposed around the bottom wall 110, the bottom wall 110 is provided with a bearing seat 111, an end surface of the side wall 120, which is away from the bottom wall 110, is provided with a plurality of mounting portions 121 and a plurality of hollow portions 122, the mounting portions 121 and the hollow portions 122 are disposed at intervals along a circumferential direction of the side wall 120, and a projection of the hollow portions 122 on an axial section of the side wall 120 is a curve; wherein, along the axial of bearing frame 111, the minimum distance between the interior bottom surface of bearing frame 111 and fretwork portion 122 is H1, and the distance between the interior bottom surface of bearing frame 111 and installation department 121 is H2, and along the radial of bearing frame 111, the minimum internal diameter of lateral wall 120 is D1, and the biggest external diameter that a plurality of installation departments 121 formed is D2, satisfies:

casing 100 is including diapire 110 and lateral wall 120, lateral wall 120 encircles and sets up on diapire 110, diapire 110 is provided with bearing frame 111, bearing frame 111 is used for the installation bearing, lateral wall 120 deviates from the terminal surface of diapire 110 and is provided with a plurality of installations 121 and a plurality of fretwork portion 122, a plurality of installations 121 set up along the circumference interval of lateral wall 120, installation 121 is used for wearing to establish the fastener, so that connect two casings 100 through a plurality of installations 121, a plurality of fretwork portions 122 set up along the circumference interval of lateral wall 120, the axial section projection of fretwork portion 122 at lateral wall 120 is the curve, wherein, along the axial of bearing frame 111, the minimum distance between the inner bottom surface of bearing frame 111 and fretwork portion 122 is H1, the distance between the inner bottom surface of bearing frame 111 and installation 121 is H2, along the radial of bearing frame 111, the minimum internal diameter of lateral wall 120 is D1, the maximum external diameter that a plurality of installations 121 formed is D2, satisfy:

the maximum diameter D2 formed by the installation parts 121 is set according to the minimum diameter D1 of the side wall 120, the minimum distance H1 from the inner bottom surface of the bearing seat 111 to the hollow part 122 and the distance H2 from the bearing seat 111 to the installation parts 121, so that the maximum diameter D2 formed by the installation parts 121 is prevented from being too large, the cutting size of the shell 100 can be reduced, the cutting amount of plates is reduced, the utilization rate of materials is improved, and the manufacturing cost of the end cover is reduced.

H2 is a distance between an inner bottom surface of the bearing seat 111 and an end surface of the mounting portion 121 facing away from the bearing seat 111.

Note that, referring to fig. 2 and 5, the distance from the expanded sheet material at the end caps D2 and H1 to the center is R1, that is, the distance from the mounting portion 121 to the center of the expanded material is R1; the distance to the center after panel expansion of end cover D1 and H2 department is R2, and the distance of fretwork portion 122 to exhibition material center is R2 promptly, satisfies simultaneously:

that is, the sum of the area of the circle formed by the plurality of mounting portions 121 and the area of the side wall 120 is equal to π R1 ² (ii) a The sum of the area of the bottom wall 110 and the area of the side wall 120 below the hollow part 122 is equal to pi R2 ² And when:

when it is ready to satisfy

In the process, the cutting size of the shell 100 can be reduced, the utilization rate of the plate is improved, and the cutting area of the plate is reduced.

When R2 is less than or equal to R1, the radial size of the shell 100 can be increased, and the shell 100 can be conveniently formed in a deep drawing mode, the mounting part 121 can be integrally formed on the side wall 120, so that the mounting size of the shell 100 is ensured, the situation that the cutting size of the shell 100 is too small is avoided, the forming efficiency of the shell 100 is improved, the manufacturing difficulty of the shell 100 is reduced, and the production cost of the shell 100 is reduced;

when in use

In the process, the problem that the cutting size of the shell 100 is too large can be avoided, so that the cutting size of the shell 100 can meet the deep drawing forming of the end cover, the cutting part of a plate is reduced, the utilization rate of the material is improved, and the production cost of the end cover is reduced.

By setting up

The size of the shell 100 can be reduced while the installation size of the shell 100 is ensured, the cut part of the plate is reduced, and the manufacturing cost of the end cover is reduced.

The corner parts of the spread material of the end cover are formed into mounting parts 121 after drawing forming, hollow parts 122 are formed between every two adjacent mounting parts 121, and the central part of the spread material is drawn to form a bearing seat 111.

In addition, the hollow part 122 is arranged on the side wall 120, so that the side wall 120 can form a hollow structure, air flow can conveniently pass through, heat emitted out of the shell 100 can be accelerated, heat is prevented from accumulating in the shell 100, and the service life of the motor is prolonged.

Referring to fig. 2, it can be understood that the hollow portion 122 projects as a parabola on the axial section of the sidewall 120. The axial section of the side wall 120 is parabolic by the arrangement of the hollow-out portion 122, so that the cutting size of the shell 100 can be reduced, the shell 100 can be conveniently arranged in a manner of improving the arrangement density of plates during cutting, the cutting part of the end cover plate is reduced, the utilization rate of the materials is improved, and the processing cost of the end cover is reduced.

Referring to fig. 2 and 5, by providing the sidewall 120 of the hollow portion 122 with a parabolic axial cross section, the shape of the shell 100 can be simplified when the end cap is cut, the cutting efficiency of the end cap can be improved, and the waste of material can be reduced. The shape of the hollow portion 122 is a straight line in the material spreading schematic diagram of the shell 100, so that the material spreading shape of the shell 100 is close to a polygon, the material spreading shape of the shell 100 is a regular polygon, the material spreading of the end cover is facilitated, the material spreading density of the plate is improved, the cutting of the material is reduced, and the manufacturing cost of the end cover is reduced. When the plate of the shell 100 is formed by deep drawing, the outer contour of the material can be recessed inwards along the axial direction of the side wall 120, so that the hollow part 122 can be integrally formed on the side wall 120, the cutting on the side wall 120 is not needed, the forming process of the end cover is simplified, the end surface of the side wall 120, which is away from the bottom wall 110, can be in smooth transition, the concentration of stress is reduced, and the service life of the end cover is prolonged.

Referring to fig. 1 and 4, it can be understood that the number of the mounting portions 121 and the hollowed-out portions 122 is 4, and the mounting portions 121 and the hollowed-out portions 122 are arranged in a staggered manner along the circumferential direction of the side wall 120. Through set up 4 installation departments 121 and 4 fretwork portions 122 at the terminal surface that lateral wall 120 deviates from diapire 110, make the both ends of fretwork portion 122 can be connected with two adjacent installation departments 121, be convenient for connect two casings 100 through installation department 121, improve the assembly efficiency of end cover. In addition, the number of the hollow parts 122 is 4, so that the cutting shape of the end cover can be simplified, the cutting time of the end cover is shortened, and the utilization rate of materials is improved.

It should be noted that, referring to fig. 3 and 5, when the number of the installation portions 121 and the number of the hollow portions 122 are 4, the material spreading shape of the casing 100 is close to a square, so that the material cutting shape of the casing 100 is the square of fig. 4, which facilitates the material cutting of the casing 100, improves the arrangement density of the material cutting of the casing 100, reduces the cutting portions of the plate material, and reduces the processing cost of the end cover.

Referring to fig. 6 and 8, an embodiment of the second aspect of the present invention provides an electric machine, including a stator component 210, a rotor component 220 and two end caps according to an embodiment of the first aspect of the present invention, the two end caps are fixedly connected to both axial ends of the stator component 210, the stator component 210 surrounds the rotor component 220, the rotor component 220 includes a rotating shaft 221, and the rotating shaft 221 connects the bearing seat 111 through a bearing.

The installation department 121 of two end covers wears to be equipped with fastener 230, can connect two end covers at the axial both ends of stator part 210 through fastener 230, the messenger can conveniently fix stator part 210 on two end covers, the assembly efficiency of motor is improved, stator part 210 sets up around rotor part 220, rotor part 220 is including pivot 221, pivot 221 passes through the bearing and connects at bearing frame 111, make pivot 221 can smoothly rotate at bearing frame 111, reduce the position of pivot 221 and rock, the motion stability of improvement rotor part 220, the reliability of promotion motor.

Referring to fig. 4, 6 and 7, it can be understood that a plurality of supporting portions 123 are disposed on an inner wall of an end of the side wall 120 facing away from the bottom wall 110, the plurality of supporting portions 123 are spaced along a circumferential direction of the side wall 120, and the stator component 210 is mounted on the plurality of supporting portions 123. Rotor part 220 rotates and sets up in stator part 210, the terminal surface that lateral wall 120 deviates from diapire 110 is provided with a plurality of bearing portions 123, a plurality of bearing portions 123 set up along the circumference interval of lateral wall 120, can hold stator part 210 in lateral wall 120 through a plurality of bearing portions 123, and can conveniently fix a position stator part 210's position, improve stator part 210 at the position precision of end cover, reduce stator part 210's position and rock, make things convenient for stator part 210's assembly, reduce the assemble duration of motor, reduce the manufacturing cost of motor.

It should be noted that, the supporting portion 123 is disposed on the inner side of the side wall 120, and the side wall 120 may be punched first and then the side wall 120 may be turned, so that the supporting portion 123 can be quickly formed on the side wall 120, thereby improving the processing efficiency of the end cover.

Referring to fig. 4, 6 and 7, it can be understood that the contact surface of the stator part 210 and the bearing part 123 is projected as a circular arc line on the radial cross section of the side wall 120. The stator component 210 is arranged in the bearing part 123, and the projection of the contact surface of the stator component 210 and the bearing part 123 on the radial section of the side wall 120 is an arc line, so that the stator component 210 can be conveniently positioned in the bearing part 123, the stator component 210 can be conveniently arranged in the bearing part 123, the contact area of the stator component 210 and an end cover can be increased, the attachment degree of the stator component 210 and the bearing part 123 is improved, the position stability of the stator component 210 is improved, the shaking of the stator component 210 is reduced, and the service performance of the motor is improved.

The bearing portion 123 has a bottom surface and a side surface, the stator component 210 is disposed on the bottom surface of the bearing portion 123 and abuts against the side surface of the bearing portion 123, the side surface of the bearing portion 123 is an arc surface, and the side surfaces of the stator component 210 and the bearing portion 123 are projected as an arc line on the radial cross section of the side wall 120, so that the contact area between the stator component 210 and the bearing portion 123 is increased, and the positional stability of the stator component 210 is improved. Referring to fig. 2 and 6, it can be understood that the distance between the inner bottom surface of the bearing housing 111 and the stator part 210 is H3, which satisfies: h2 > H3. Along the axial of bearing frame 111, distance H2 between the interior bottom surface through setting up bearing frame 111 and installation department 121 is greater than the interior bottom surface of bearing frame 111 and stator part 210's distance H3, make the position of installation department 121 be higher than the position of bearing portion 123, make lateral wall 120 extend and form installation department 121, make things convenient for installation department 121 integrated into one piece on casing 100, improve the structural strength of installation department 121, reduce the risk of installation department 121 fracture inefficacy, the life of extension end cover. In addition, the installation part 121 is higher than the bearing part 123, so that the forming process of the end covers can be simplified, the two end covers can be conveniently buckled together, the assembly efficiency of the motor is improved, and the production cost of the motor is reduced.

Referring to fig. 3 and 6, it can be understood that the bottom wall 110 is opened with a plurality of first through holes 112, and the plurality of first through holes 112 are disposed around the bearing seat 111 at intervals. The bottom wall 110 is provided with a plurality of first through holes 112, and the plurality of first through holes 112 are arranged around the bearing seat 111, so that the air flow can enter the housing 100 from the plurality of first through holes 112 conveniently, the heat of the stator part 210 and the rotor part 220 can be absorbed through the air flow conveniently, the running temperature of the motor can be reduced, the service life of the motor can be prolonged, and the reliability of the motor can be improved.

It should be noted that, in order to improve the heat dissipation effect of the motor, the first through holes 112 are uniformly spaced around the bearing seat 111, so that the motion stability of the airflow can be improved, the turbulent flow generated in the housing 100 is avoided, the rotation resistance of the rotor component 220 is reduced, and the reliability of the motor is improved.

Referring to fig. 6, it can be understood that the sidewall 120 is opened with a plurality of second through holes 124, and the plurality of second through holes 124 are disposed at intervals. The side wall 120 is provided with a plurality of second through holes 124, and the plurality of second through holes 124 can facilitate the airflow to enter the housing 100, so that the heat of the stator part 210 and the rotor part 220 can be absorbed by the airflow, the operating temperature of the motor can be reduced, the heat is prevented from accumulating in the housing 100, the service life of the motor is prolonged, and the reliability of the motor is improved.

It should be noted that, through the cooperation of the first through hole 112 and the second through hole 124, the air flow can smoothly pass through the casing 100, the motion stability of the air flow is improved, the heat dissipation effect of the motor is improved, and the service life of the motor is prolonged.

Referring to fig. 1, 3 and 6, it can be understood that the bottom wall 110 is provided with a rib 113, the rib 113 is protruded in a direction away from the side wall 120 in an axial direction of the bearing housing 111, the rib 113 is annular in shape, and the rib 113 is coaxially arranged with the bearing housing 111. The ribs 113 are disposed on the bottom wall 110, and the ribs 113 can improve the structural strength of the housing 100, reduce the possibility of deformation of the end cap, improve the structural rigidity of the end cap, reduce the possibility of excessive deformation and failure of the end cap, and improve the reliability of the end cap. The shape through setting up protruding muscle 113 is the annular, makes the structural strength that can further improve the end cover to through setting up protruding muscle 113 and bearing frame 111 coaxial, make the structural rigidity that can improve bearing frame 111, improve the structural stability of bearing frame 111, reduce the possibility that bearing frame 111 warp, make things convenient for pivot 221 to stabilize in bearing frame 111, improve the reliability of motor.

The rib 113 may be provided to protrude toward the mounting portion 121; in addition, a plurality of ribs 113 may be provided, and the plurality of ribs 113 are provided at intervals in the radial direction of the bearing seat 111, so that the structural strength of the end cover can be enhanced, and the reliability of the end cover can be improved.

Referring to fig. 1, it can be understood that the junction of the bottom wall 110 and the side wall 120 is rounded. Through the smooth transition of the junction that sets up diapire 110 and lateral wall 120, make the structural strength that can improve the end cover, reduce the stress concentration of end cover, reduce the risk that the junction of the terminal surface of the lateral wall 120 of end cover and end cover produced the crackle, make the lateral wall 120 of end cover and the junction wall thickness of terminal surface even, the life of extension end cover improves the reliability of motor.

It should be noted that, by arranging the smooth transition at the joint of the bottom wall 110 and the side wall 120, the end cover can be conveniently drawn and formed, failure at the joint of the bottom wall 110 and the side wall 120 is reduced, the yield of the end cover is improved, and the production cost of the end cover is reduced.

Referring to fig. 6, an embodiment of the third aspect of the present invention provides an electric device, including an embodiment of the second aspect of the present invention, which has all technical features of an embodiment of the second aspect of the present invention, and therefore has the beneficial effects of all the embodiments described above, and is not described herein again.

In the related art, the electric equipment comprises a washing machine, a fan, a compressor and the like, and by arranging the motor in the embodiment, the manufacturing cost of the electric equipment can be reduced, and the production benefit of the electric equipment is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims

1. An end cap, comprising:

the shell is a sheet metal part and comprises a bottom wall and a side wall, the side wall surrounds the bottom wall, a bearing seat is arranged on the bottom wall, a plurality of installation parts and a plurality of hollow parts are arranged on the end face, away from the bottom wall, of the side wall, the installation parts and the hollow parts are arranged at intervals along the circumferential direction of the side wall, and the projection of the hollow parts on the axial section of the side wall is a curve;

wherein, follow the axial of bearing frame, the interior bottom surface of bearing frame with minimum distance between the fretwork portion is H1, the interior bottom surface of bearing frame with distance between the installation department is H2, follows the radial of bearing frame, the minimum internal diameter of lateral wall is D1, and is a plurality of the biggest external diameter that the installation department formed is D2, satisfies:

2. the end closure of claim 1, wherein said cutout projects in a parabolic manner in an axial cross-section of said sidewall.

3. The end cover according to claim 1 or 2, wherein the number of the mounting portions and the hollowed-out portions is 4, and the mounting portions and the hollowed-out portions are arranged in a staggered manner along the circumferential direction of the side wall.

4. An electrical machine comprising a stator part, a rotor part and two end caps according to any one of claims 1 to 3, the two end caps being fixedly attached to axial ends of the stator part, the stator part surrounding the rotor part, the rotor part including a shaft, the shaft being connected to the bearing housing by a bearing.

5. The motor of claim 4, wherein a plurality of bearing portions are arranged on an inner wall of one end of the side wall, which is away from the bottom wall, the plurality of bearing portions are arranged at intervals along the circumferential direction of the side wall, and the stator component is arranged on the plurality of bearing portions.

6. The electric machine of claim 5, wherein the contact surface of the stator component with the bearing portion projects as a circular arc line in a radial cross-section of the sidewall.

7. The electric machine of claim 4, wherein the inner bottom surface of the bearing housing is at a distance H3 from the stator component, satisfying: h2 > H3.

8. The motor of claim 4, wherein the bottom wall defines a plurality of first through holes, the plurality of first through holes being spaced around the bearing housing.

9. The motor according to claim 4 or 8, wherein the side wall is provided with a plurality of second through holes, and the plurality of second through holes are arranged at intervals.

10. An electrically powered device, characterized in that it comprises an electric machine according to any one of claims 4 to 9.