End cover assembly and plastic-sealed motor having the same

Abstract

The present invention provides an end cover assembly and a plastic-sealed motor having the same, wherein the end cover assembly comprises a first end cover, an elastic member and a second end cover; a protrusion is formed on the top of the first end cover, and a first mounting hole is formed on the top wall of the protrusion; a bearing chamber and a limiting portion are formed on the second end cover; the elastic member comprises an elastic member body, a first clamping portion and a clamping groove; a side wall of the bearing chamber is embedded in the second mounting hole, the first clamping portion is arranged between the limiting portion and the top wall of the protrusion, and the top wall of the protrusion is embedded in the clamping groove; a mounting foot is formed on the end cover body, and a third mounting hole is formed on the tangential portion of the mounting foot, thereby reducing the structure and installation size of the motor; the structure is simple, the molding quality is high, and the vibration reduction effect is obvious; when the above-mentioned end cover assembly is applied to the plastic-sealed motor, the limiting groove of the stator assembly cooperates with the limiting buckle of the end cover body to realize the connection between the stator assembly and the end cover body, and one end of the rotating shaft is arranged in the bearing chamber; the connection is reliable, the performance of the motor is stable, and the vibration noise of the motor is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to an end cover assembly and a plastic-encapsulated motor having the same. Background Art

[0002] The plastic-encapsulated motor includes a stator assembly, a rotor assembly and an end cover; the end cover is formed with a bearing cavity, the rotor assembly is installed inside the stator assembly, the end cover is arranged at the end of the stator assembly, and one end of the rotating shaft is arranged in the bearing cavity; during the operation and transportation of the motor, the up and down vibration of the rotor assembly will generate noise and affect the performance of the motor; the existing technology mainly uses elastic wave pads to adjust the virtual size and vibration reduction, but the end cover body and the bearing cavity are integrally formed, and the vibration reduction effect of the elastic wave pad is limited, and the vibration between the rotor assembly and the end cover cannot be well isolated, and then the stator assembly also generates a large amplitude of vibration, which greatly affects the performance of the motor; Summary of the invention

[0003] In view of this, the present invention provides an end cover assembly and a plastic-encapsulated motor having the same, so as to solve the problems in the prior art such as complex end cover structure, unreasonable setting position of elastic wave pad, small vibration reduction effect and limited size range of virtual position adjustment.

[0004] The present invention provides an end cover assembly, the end cover assembly comprising a first end cover, a second end cover and an elastic member arranged between the first end cover and the second end cover; the first end cover comprises an end cover body, the end cover body is formed with a first mounting hole; the second end cover is formed with a bearing chamber with one end open and the other end closed; the elastic member comprises an elastic member body, the elastic member body is formed with a second mounting hole;

[0005] The elastic member body is embedded in the first mounting hole, and the side wall of the bearing chamber is embedded in the second mounting hole.

[0006] Further optionally, a protrusion protruding upward from the end cover body is formed on the top of the end cover body, and the top wall of the protrusion forms the first mounting hole; when the side wall of the bearing chamber is embedded in the second mounting hole, the axial extension direction of the protrusion is opposite to the axial extension direction of the bearing chamber, and the bearing chamber is open to the top of the end cover body.

[0007] Further optionally, the second end cover forms a limiting portion at the open end of the bearing chamber, and the limiting portion is arranged around the outer circumference of the bearing chamber; when the side wall of the bearing chamber is embedded in the second mounting hole, the limiting portion cooperates with the top wall of the protrusion.

[0008] Further optionally, a first clamping portion and a second clamping portion are respectively formed at both ends of the elastic member body;

[0009] A clamping groove is formed between the first clamping portion and the second clamping portion; the elastic member body is embedded in the first mounting hole, the first clamping portion is arranged between the limiting portion and the top wall of the protrusion, and the top wall of the protrusion is embedded in the clamping groove.

[0010] Further optionally, the outer diameter of the elastic member body is equal to the hole diameter of the first mounting hole, and the outer diameters of the first clamping portion and the second clamping portion are both larger than the outer diameter of the elastic member body.

[0011] Further optionally, the first clamping portion and the second clamping portion are both arranged on the outer circumference of the elastic member body, the longitudinal section of the first clamping member is cylindrical, and the longitudinal section of the second clamping member is truncated cone.

[0012] Further optionally, a plurality of diamond-shaped holes are formed on the side surface of the first clamping member.

[0013] Further optionally, a mounting foot is formed at the bottom of the end cover body, and the mounting foot includes an axial portion extending along the axial direction of the end cover body and a radial portion extending along the radial direction of the end cover body; both ends of the axial portion are respectively connected to the end cover body and the radial portion.

[0014] Further optionally, the radial portion is formed with a tangential portion extending along the tangential direction of the end cover body, and the tangential portion is formed with a third mounting hole.

[0015] Further optionally, a limiting buckle extending upward from the end cover body is formed on the outer peripheral side of the end cover body; and an annular groove is formed on the end cover body between the limiting buckle and the protrusion.

[0016] Further optionally, the limit buckle includes an axial arm and a circumferential arm connected to the axial arm, the axial arm extends from the outer peripheral side of the end cover body along the axial direction of the end cover body, and the circumferential arm extends from the axial arm along the circumferential direction of the end cover body to both sides of the axial arm respectively.

[0017] The present invention further provides a plastic-encapsulated motor, comprising a stator assembly, a rotor assembly and an end cover assembly as described in any one of the above items; the first end cover, the elastic member and the second end cover are sequentially arranged from bottom to top and arranged on one side of the stator assembly;

[0018] The stator assembly includes a shell, and a limiting groove is formed on the side of the shell; the bottom of the shell is embedded in the annular groove, and the limiting groove and the limiting buckle cooperate to realize the connection between the stator assembly and the first end cover; the end cover body is formed with a wire outlet hole on the raised side wall, and the power line of the plastic-sealed motor is led out through the stator assembly and the wire outlet hole;

[0019] The rotor assembly is arranged in the stator assembly; the rotor assembly includes a rotating shaft, one end of which is provided with a first bearing, and the first bearing is arranged in the bearing chamber.

[0020] The present invention provides an end cover assembly, the end cover assembly comprises a first end cover, an elastic member and a second end cover which are arranged in sequence; the first end cover comprises an end cover body, a protrusion is formed on the top of the end cover body, and a first mounting hole is formed on the top wall of the protrusion; a bearing chamber and a limiting portion are formed on the second end cover; the elastic member comprises an elastic member body, a first clamping portion and a second clamping portion; the side wall of the bearing chamber is embedded in the second mounting hole, the first clamping portion is arranged between the limiting portion and the top wall of the protrusion, and the top wall of the protrusion is embedded in the clamping groove between the first clamping portion and the second clamping portion; a mounting foot is formed on the bottom of the end cover body, the mounting foot comprises an axial portion, a radial portion and a tangential portion, and the tangential portion is formed with a third mounting hole. The mounting hole reduces the structure and installation size of the motor; the end cover assembly has a simple structure and high molding quality, the elastic member can achieve axial and radial vibration reduction at the same time, the vibration reduction effect is obvious, and the size range of the virtual position adjustment is large; when the above-mentioned end cover assembly is applied to the plastic-sealed motor, the shell of the stator assembly forms a limiting groove, the outer peripheral side of the end cover body forms a limiting buckle, the limiting groove and the limiting buckle cooperate to achieve the connection between the stator assembly and the end cover body, and a first bearing is provided at one end of the rotating shaft and is arranged in the bearing chamber; the movement of the rotor assembly during operation is prevented, the connection is reliable, and the performance of the motor is stable; the problem of cracks in the elastic wave pad is avoided, the vibration noise of the motor is effectively improved, and the heat dissipation performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0023] Figure 1a and Figure 1b A schematic structural diagram of a first end cover embodiment provided by the present invention;

[0024] Figure 2a and Figure 2bA schematic structural diagram of a second end cover embodiment provided by the present invention;

[0025] Figure 3a A schematic diagram of the axial structure of an embodiment of an elastic member provided by the present invention;

[0026] Figure 3b A schematic diagram of a top view of an elastic member embodiment provided by the present invention;

[0027] Figure 3c for Figure 3b Schematic diagram of the cross-sectional structure of AA;

[0028] Figure 4a , Figure 4b and Figure 4c A schematic diagram of the structure of an embodiment of an end cover assembly provided by the present invention;

[0029] Figure 5a and Figure 5b A schematic diagram of the structure of a plastic-encapsulated motor embodiment provided by the present invention;

[0030] In the figure:

[0031] 1-first end cover; 11-end cover body; 111-wire outlet hole; 12-protrusion; 121-first mounting hole; 122-protrusion top wall; 123-protrusion side wall; 13-mounting foot; 131-axial part; 132-radial part; 133-tangential part; 1331-third mounting hole; 14-limiting buckle; 141-axial arm; 142-circumferential arm; 15-annular groove;

[0032] 2-second end cover; 21-bearing chamber; 22-limiting part;

[0033] 3-elastic member; 31-elastic member body; 311-second mounting hole; 32-first clamping portion; 321-diamond hole; 33-clamping groove; 34-second clamping portion;

[0034] 4-plastic-encapsulated motor; 41-stator assembly; 411-housing; 412-limiting groove; 42-rotor assembly; 421-rotating shaft; 431-first bearing; 432-second bearing. DETAILED DESCRIPTION

[0035] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0037] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0039] In the existing motor, the bearing cavity and the end cover body are integrally formed, which makes the structure of the end cover complicated and the molding quality poor; at the same time, the virtual position size is adjusted by the elastic wave pad, but due to the unreasonable setting position, the adjustment range is limited, and only radial vibration can be weakened, and the vibration reduction effect is small. The present invention creatively provides an end cover assembly, which includes a first end cover, an elastic member and a second end cover arranged in sequence; the first end cover includes an end cover body, and the end cover body is formed with a first mounting hole; the second end cover is formed with a bearing chamber; the elastic member includes an elastic member body, and the elastic member body is formed with a second mounting hole; the elastic member body is embedded in the first mounting hole, and the side wall of the bearing chamber is embedded in the second mounting hole; the second end cover and the first end cover are separately formed, which simplifies the structure of the end cover assembly and improves the strength of the end cover assembly; the elastic member body is arranged between the side wall of the bearing chamber and the first mounting hole, and the other part of the elastic member is arranged between the axial matching surfaces of the first end cover and the second end cover, which increases the adjustment range of the virtual position size, can simultaneously achieve radial and axial vibration reduction, has obvious vibration reduction effect, low noise, and makes the connection and operation of each component reliable.

[0040] <End cap assembly>

[0041] like Figure 1a , Figure 1b , Figure 2a , Figure 2b , Figure 3a , Figure 3b , Figure 4a and Figure 4b As shown, this embodiment provides an end cover assembly, which includes a first end cover 1, a second end cover 2 and an elastic member 3 arranged between the first end cover 1 and the second end cover 2; the first end cover 1 includes an end cover body 11, and the end cover body 11 is formed with a first mounting hole 121; the second end cover 2 is formed with a bearing chamber 21 with one end open and the other end closed; the elastic member 3 includes an elastic member body 31, and the elastic member body 31 is formed with a second mounting hole 311; the elastic member body 31 is embedded in the first mounting hole 121, and the side wall of the bearing chamber 21 is embedded in the second mounting hole 311, and the first end cover 1 and the second end cover 2 are formed separately , high molding quality, simplified the structure of the end cover assembly, and improved the strength of the end cover assembly; the elastic member body 31 is arranged between the side wall of the bearing chamber 21 and the first mounting hole 121 to reduce the radial vibration between the first end cover 1 and the second end cover 2; the other part of the elastic member 3 is arranged between the axial matching surfaces of the first end cover 1 and the second end cover 2 to reduce the axial vibration between the first end cover 1 and the second end cover 2; the elastic member 3 fully isolates the vibration between the first end cover 1 and the second end cover 2, the vibration reduction effect is obvious, the adjustment range of the virtual position size is improved, the noise is small, and the service life of each component and the reliability of the connection are guaranteed.

[0042] Further, if Figure 1a and Figure 4c As shown, a protrusion 12 protruding toward the top of the end cover body 11 is formed on the top of the end cover body 11, and the top wall of the protrusion 122 forms the first mounting hole 121; when the side wall of the bearing chamber 21 is embedded in the second mounting hole 311, the axial extension direction of the protrusion 12 is opposite to the axial extension direction of the bearing chamber 21, and the bearing chamber 21 is open to the top of the end cover body 11; preferably, the protrusion 12 is a cylindrical protrusion, and the bearing chamber 21 is in the shape of a hollow cup; the axis of the first mounting hole 121 coincides with the axis of the protrusion 12 and the axis of the end cover body 11, and the aperture of the first mounting hole 121 is adapted to the outer diameter of the bearing chamber 21, so as to facilitate the installation of the elastic member 3 and reduce radial vibration.

[0043] like Figure 2b As shown, in order to limit the elastic member 3 between the first end cover 1 and the second end cover 2 and realize the effective cooperation between the first end cover 1 and the second end cover 2, the second end cover 2 forms a limiting portion 22 at the open end of the bearing chamber 21, and the limiting portion 22 is arranged in a ring on the outer peripheral side of the bearing chamber 21; when the side wall of the bearing chamber 21 is embedded in the second mounting hole 311, the limiting portion 22 cooperates with the raised top wall 122; specifically, the limiting portion 22 is annular in structure, extending radially outward from the side wall of the bearing chamber 21 along the radial direction of the bearing chamber 21, and along the axial direction of the end cover body 11, the radial size of the limiting portion 22 satisfies that the elastic member 3 can be well limited between the first end cover 1 and the second end cover 2, and has a good vibration reduction effect on the vibration between the first end cover 1 and the second end cover 2.

[0044] like Figure 3c As shown, in order to improve the vibration reduction effect between the first end cover 1 and the second end cover 2, the first clamping portion 32 and the second clamping portion 34 are respectively formed at both ends of the elastic member body 31; a clamping groove 33 is formed between the first clamping portion 32 and the second clamping portion 34; the elastic member body 31 is embedded in the first mounting hole 121, the first clamping portion 32 is arranged between the limiting portion 22 and the raised top wall 122, and the raised top wall 122 is embedded in the clamping groove 33; specifically, the first clamping portion 32 and the second clamping portion 34 are respectively formed at the top of the elastic member body 31 , bottom, when the elastic member body 31 is embedded in the first mounting hole 121, the first clamping portion 32 and the second clamping portion 34 are respectively arranged on both sides of the raised top wall 122, so that when the second end cover 2 vibrates axially toward the upper side of the second end cover 2, the first clamping portion 32 can slow down the vibration of the second end cover 2, so that when the second end cover 2 vibrates axially toward the lower side of the second end cover 2, the second clamping portion 34 can slow down the vibration of the second end cover 2; the raised top wall 122 is embedded in the clamping groove 33, which can slow down the radial vibration of the second end cover 2 relative to the first end cover 1. The outer diameter of the elastic member body 31 is equal to the aperture of the first mounting hole 121, and the outer diameters of the first clamping portion 32 and the second clamping portion 34 are greater than the outer diameter of the elastic member body 31.

[0045] Preferably, the first clamping portion 32 and the second clamping portion 34 are both arranged on the outer peripheral side of the elastic member body 31, and along the cross section of the elastic member 3, the first clamping portion 32 and the second clamping portion 34 are both annular structures; along the longitudinal section of the elastic member 3, the first clamping portion 32 is cylindrical, and the second clamping portion 34 is a frustum of cones; specifically, the top of the frustum points to the top of the elastic member 3, which is conducive to the raised top wall 122 being smoothly inserted into the clamping groove 33 and reducing the amount of material used, which is conducive to the adjustment of the motor virtual size and the improvement of the motor vibration noise.

[0046] Further, if Figure 3a As shown, in order to improve the axial vibration reduction effect of the first clamping member 32 along the elastic member 3, a plurality of diamond holes 321 are opened on the side of the first clamping member 32; preferably, the plurality of diamond holes 321 are distributed along the circumferential direction and the axial direction of the first clamping member 32; when the second end cover 2 vibrates, the elastic member 3 is deformed, and the diamond holes 321 can effectively absorb the deformation of the first clamping member 32, thereby achieving a significant vibration reduction effect and effectively improving vibration noise.

[0047] In order to reduce the structure and installation size of the motor, such as Figure 1a , Figure 1b and Figure 4cAs shown, a mounting foot 13 is formed at the bottom of the end cover body 11, and the mounting foot 13 includes an axial portion 131 extending along the axial direction of the end cover body 11 and a radial portion 132 extending along the radial direction of the end cover body 11; both ends of the axial portion 131 are respectively connected to the end cover body 11 and the radial portion 132; specifically, the axial portion 131 extends from the bottom of the end cover body 11 to the bottom of the end cover body 11, so that a certain installation space is formed below the end cover body 11, which is convenient for fixing the first end cover 1 and plays a connecting and supporting role; the radial portion 132 extends from the axial portion 131 to the center line direction of the end cover body 11, which is convenient for connecting the mounting foot 13 with other components.

[0048] Furthermore, the radial portion 132 is formed with a tangential portion 133 extending tangentially along the end cover body 11, and the tangential portion 133 is formed with a third mounting hole 1331, so that there is a certain operating space when the mounting foot 13 is connected to other components; a plurality of mounting feet 13 are arranged at the bottom of the end cover body 11, and the plurality of mounting feet 13 are distributed along the circumference of the end cover body 11; in this embodiment, four mounting feet 13 are arranged at the bottom of the end cover body 11.

[0049] In order to realize the connection between the first end cover 1 and the components located above the first end cover 1, a limit buckle 14 extending upward from the end cover body 11 is formed on the outer peripheral side of the end cover body 11; an annular groove 15 is formed between the limit buckle 14 and the protrusion 12 of the end cover body 11; the annular groove 15 is open to the top of the end cover body 11; specifically, the limit buckle 14 is a T-shaped structure, which is used to limit the axial and circumferential movement of the first end cover 1 relative to the motor; the limit buckle 14 includes an axial arm 141 and a circumferential arm 142 connected to the axial arm 141, and the axial The axial arm 141 extends from the outer peripheral side of the end cover body 11 along the axial direction of the end cover body 11 toward the top of the end cover body 11, and the circumferential arm 142 extends from the axial arm 141 along the circumferential direction of the end cover body 11 to both sides of the axial arm 141 respectively; preferably, the cross-section of the axial arm 141 is frustum-shaped and the vertex of the frustum points to the center line of the end cover body 11; the end cover body 11 is provided with a plurality of limit buckles 14, and the plurality of limit buckles 14 are distributed along the circumference of the end cover body 11; in this embodiment, the end cover body 11 is provided with four limit buckles 14.

[0050] The end cover body 11 is formed with a wire outlet hole 111 on the raised side wall 123 for leading out the power line of the motor.

[0051] Preferably, the first end cover 1 is formed by stretching through a mold machine tool.

[0052] <Plastic-encapsulated motor>

[0053] like Figure 5a and Figure 5bAs shown, this embodiment also provides a plastic-encapsulated motor, comprising a stator assembly 41, a rotor assembly 42 and an end cover assembly as described in any one of the above items; in the end cover assembly, the first end cover 1, the elastic member 3 and the second end cover 2 are coaxially arranged in sequence from bottom to top and are arranged below the stator assembly 41;

[0054] The stator assembly 41 includes a shell 411 that is surrounded by the outside of the stator assembly 41, and a limiting groove 412 is formed on the side of the shell 411. The structure of the limiting groove 412 is compatible with the structure of the circumferential arm 142 of the limiting buckle 14; specifically, the cross-section of the limiting groove 412 is a conical groove and the vertex of the conical groove points to the center line of the shell; along the axial direction of the shell 411, the top of the limiting groove 412 is open, which is convenient for the limiting buckle 14 to be clamped in the limiting groove 412, and the bottom of the limiting groove 412 is closed, and the limiting groove 412 has axial and circumferential limiting effects on the limiting buckle 14.

[0055] The bottom of the housing 411 is embedded in the annular groove 15, and the limiting groove 412 and the limiting buckle 14 cooperate to realize the connection between the stator assembly 41 and the first end cover 1; the end cover body 11 is provided with four limiting buckles 14, and the housing 411 is correspondingly provided with four limiting grooves 412; the power line of the plastic-encapsulated motor 4 is led out through the stator assembly 41 and the outlet hole 111;

[0056] The stator assembly 41 forms an accommodating cavity, and the rotor assembly 42 is arranged in the accommodating cavity; the rotor assembly 42 includes a rotating shaft 421, and a first bearing 431 is provided at one end of the rotating shaft 421, and the first bearing 431 is arranged in the bearing chamber 21. The outer ring of the first bearing 431 is interference-connected with the bearing chamber 21, which plays a role in supporting and fixing the bearing; a second bearing 432 is provided at the other end of the rotating shaft 421, and the second bearing 432 is arranged at the top of the shell 411; in addition to adjusting the virtual size of the plastic-encapsulated motor 4, the end cover assembly can also improve the vibration noise of the plastic-encapsulated motor 4.

[0057] The assembly method of the plastic-encapsulated motor 4 is as follows:

[0058] ① Install the first bearing 431 and the second bearing 432 at both ends of the rotating shaft 421 respectively;

[0059] ② The rotor assembly 42 is arranged in the accommodation cavity of the stator assembly 41;

[0060] ③ The elastic member body 31 of the elastic member 3 is arranged in the first mounting hole 121 of the first end cover 1, and the side wall of the bearing chamber 21 of the second end cover 2 is embedded in the second mounting hole 311, so that the first end cover 1, the elastic member 3 and the second end cover 2 form an end cover assembly;

[0061] ④ Make the annular groove 15 of the end cover body 11 correspond to the bottom of the housing of the stator assembly 41, the bearing chamber 21 corresponds to the first bearing 431, and the power line of the plastic-sealed motor 4 is led out from the stator assembly 41 and the outlet hole 111;

[0062] ⑤ Press the bottom of the housing 411 into the annular groove 15, and press the first bearing 431 into the bearing chamber 21;

[0063] ⑥ Press the limit buckle 14 so that the limit buckle 14 is locked in the limit groove 412, so that the end cover assembly is fixedly connected to the stator assembly 41.

[0064] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. An end cap assembly, It is characterized in that The end cover assembly comprises a first end cover, a second end cover and an elastic member disposed between the first end cover and the second end cover; The first end cover comprises an end cover body, a protrusion protruding upward from the end cover body is formed on the top of the end cover body, and a first mounting hole is formed on the top wall of the protrusion; The second end cover forms a bearing chamber with one end open and the other end closed, and the second end cover forms a limiting portion at the open end of the bearing chamber; the limiting portion extends outward from the side wall of the bearing chamber along the radial direction of the bearing chamber, and the limiting portion is arranged around the outer circumference of the bearing chamber; The elastic member comprises an elastic member body, the elastic member body is embedded in the first mounting hole, and the elastic member body is formed with a second mounting hole; the two ends of the elastic member body are respectively formed with a first clamping portion and a second clamping portion, and a clamping groove is formed between the first clamping portion and the second clamping portion; The side wall of the bearing chamber is embedded in the second mounting hole, and the limiting portion cooperates with the top wall of the protrusion; the first clamping portion is arranged between the limiting portion and the top wall of the protrusion, and the top wall of the protrusion is embedded in the clamping groove.

2. The end cap assembly according to claim 1, It is characterized in that When the side wall of the bearing chamber is embedded in the second mounting hole, the axial extension direction of the protrusion is opposite to the axial extension direction of the bearing chamber, and the bearing chamber is open to the top of the end cover body.

3. The end cap assembly according to claim 2, It is characterized in that The outer diameter of the elastic member body is equal to the hole diameter of the first mounting hole, and the outer diameters of the first clamping portion and the second clamping portion are both larger than the outer diameter of the elastic member body.

4. The end cap assembly according to claim 3, It is characterized in that The first clamping portion and the second clamping portion are both arranged on the outer circumference of the elastic member body. The longitudinal section of the first clamping portion is cylindrical, and the longitudinal section of the second clamping portion is truncated cone.

5. The end cap assembly according to claim 4, It is characterized in that A plurality of diamond-shaped holes are formed on the side surface of the first clamping portion.

6. The end cap assembly according to claim 1, It is characterized in that A mounting foot is formed at the bottom of the end cover body, and the mounting foot includes an axial portion extending along the axial direction of the end cover body and a radial portion extending along the radial direction of the end cover body; two ends of the axial portion are respectively connected to the end cover body and the radial portion.

7. The end cap assembly according to claim 6, It is characterized in that The radial portion is formed with a tangential portion extending along a tangential direction of the end cover body, and the tangential portion is formed with a third mounting hole.

8. The end cap assembly according to claim 2, It is characterized in that A limiting buckle extending upward from the end cover body is formed on the outer peripheral side of the end cover body; an annular groove is formed between the limiting buckle and the protrusion on the end cover body.

9. The end cap assembly according to claim 8, It is characterized in that The limiting buckle includes an axial arm and a circumferential arm connected to the axial arm, the axial arm extends from the outer peripheral side of the end cover body along the axial direction of the end cover body, and the circumferential arm extends from the axial arm along the circumferential direction of the end cover body to both sides of the axial arm respectively.

10. A plastic-encapsulated motor, It is characterized in that It comprises a stator assembly, a rotor assembly and the end cover assembly according to any one of claims 1 to 9; the first end cover, the elastic member and the second end cover are sequentially arranged on one side of the stator assembly from bottom to top; The stator assembly includes a shell, and a limiting groove is formed on the side of the shell; the bottom of the shell is embedded in the annular groove, and the limiting groove and the limiting buckle cooperate to realize the connection between the stator assembly and the first end cover; the end cover body is formed with a wire outlet hole on the raised side wall, and the power line of the plastic-sealed motor is led out through the stator assembly and the wire outlet hole; The rotor assembly is arranged in the stator assembly; the rotor assembly includes a rotating shaft, one end of which is provided with a first bearing, and the first bearing is arranged in the bearing chamber.

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