Internal and external dual shockproof plastic package motor

Abstract

The utility model discloses an internal and external dual shockproof plastic package motor, the periphery of a stator plastic package body is provided with a plurality of installation lugs, and the installation lugs are provided with installation holes parallel to the axis direction of the stator plastic package body; the mounting hole comprises a hole body and an extension hole which are communicated in parallel, and the extension hole extends to the outer edge of the mounting lug from the hole body; a shockproof piece with an elastic solid structure is detachably arranged at the mounting hole; the anti-vibration piece is dumbbell-shaped and is provided with an axial penetrating fastener hole, a second annular body of the anti-vibration piece enters a hole body, and a first annular body and a third annular body are closely located on the two sides of the mounting lug; the rotor plastic package body comprises a rigid plastic package part and an elastic plastic package part, and the elastic plastic package part is made of a rubber material; the inner annular protrusion and the outer annular protrusion are arranged at the upper end and the lower end of the rotor plastic package body respectively, the inner annular protrusion is a part of the elastic plastic package part, the vibration reduction performance of the rotor is enhanced, the stator makes flexible contact with the motor frame through the anti-vibration piece, multi-dimensional flexible contact is achieved, and the anti-vibration capacity of the motor is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a plastic-encapsulated motor with double internal and external shock absorption. Background Art

[0002] The plastic-encapsulated motor comprises a plastic-encapsulated stator, a plastic-encapsulated rotor and an end cover. The rotor of the plastic-encapsulated motor is a special motor rotor structure. By arranging a plastic-encapsulated body on the rotor core and arranging annular protrusions at the upper and lower ends of the plastic-encapsulated body, the overall structural stability of the rotor is improved and the service life is prolonged. The dynamic balance of the rotor with this structure is convenient to adjust, the adjustment efficiency is high, and the overall structure is stable.

[0003] Patent CN109286256A discloses a plastic-encapsulated motor rotor structure and a preparation method thereof, which includes a rotating shaft (1). A rotor core (2) is sleeved outside the rotating shaft (1). A group of annularly distributed magnetic steels (3) are arranged inside the rotor core (2). A plastic-encapsulated body (4) is further arranged on the rotor core (2). Annular protrusions (5) are respectively arranged at the upper and lower ends of the plastic-encapsulated body (4)

[0004] In order to ensure the dimensional stability of the rotor and meet the specified strength, the plastic-encapsulated material usually adopts PP material and glass fiber. This material meets the requirements of rigidity, wear resistance and insulation.

[0005] When the plastic-encapsulated rotor is installed in the plastic-encapsulated motor, it has rotating bearings and end covers at both ends. The end face of the plastic-encapsulated rotor will contact with the bearings and the end cover. Although the self-vibration of the rotor is minimized as much as possible, due to the existence of the assembly gap, the intermittent pressure contact between the components is inevitable, and this intermittent pressure contact will cause damage to the motor and generate large noise. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a plastic-encapsulated motor with double internal and external shock absorption. By improving the structures of the plastic-encapsulated stator and the plastic-encapsulated rotor, the flexible contact between components is realized, and the shock resistance is improved.

[0007] The technical solution adopted by the utility model to solve the above technical problem is as follows: a plastic-encapsulated motor with double internal and external shock absorption, which includes a plastic-encapsulated stator and a plastic-encapsulated rotor;

[0008] The plastic-encapsulated stator has a cylindrical structure and includes a stator winding, a stator core and a stator plastic-encapsulated body;

[0009] A plurality of mounting ears are arranged on the outer periphery of the stator plastic-encapsulated body, and mounting holes parallel to the axial direction of the stator plastic-encapsulated body are arranged on the mounting ears;

[0010] The installation hole includes a hole body and an extension hole that are connected in parallel. The extension hole extends from the hole body to the outer edge of the installation ear; the width of the extension hole is smaller than the diameter of the hole body and larger than the radius of the hole body;

[0011] A shock-proof member with an elastic solid structure is detachably provided at the installation hole; the shock-proof member is in a dumbbell shape and is provided with a fastening hole axially penetrating through it. The shock-proof member includes a first annular body, a second annular body, and a third annular body;

[0012] The second annular body enters the hole body from the extension hole, and the first annular body and the third annular body are located on both sides of the installation ear and are in close contact with the surface of the installation ear;

[0013] The plastic-encapsulated rotor includes a rotating shaft, a rotor core, annularly distributed permanent magnets, and a rotor plastic encapsulation body;

[0014] The rotor plastic encapsulation body includes a rigid plastic encapsulation part and an elastic plastic encapsulation part, and the elastic plastic encapsulation part is made of rubber material;

[0015] Inner annular protrusions and outer annular protrusions are respectively provided at the upper and lower ends of the rotor plastic encapsulation body, and the inner annular protrusion is a part of the elastic plastic encapsulation part.

[0016] The preferred technical solution adopted by the present utility model to solve the above technical problems is that upper bearings and lower bearings are respectively provided at the upper and lower ends of the plastic-encapsulated rotor, and the outer diameters of the upper bearings and the lower bearings are smaller than the outer diameter of the inner annular protrusion.

[0017] The preferred technical solution adopted by the present utility model to solve the above technical problems is that the outer diameter of the second annular body is larger than the width of the extension hole and smaller than the diameter of the hole body;

[0018] The outer diameters of the first annular body and the third annular body are smaller than the second annular body and larger than the diameter of the hole body.

[0019] The preferred technical solution adopted by the present utility model to solve the above technical problems is that it includes an upper end cover and a lower end cover; an upper shock-proof washer is provided between the upper bearing and the upper end cover, and a lower shock-proof washer is provided between the lower bearing and the lower end cover.

[0020] The preferred technical solution adopted by the present utility model to solve the above technical problems is that the lower surface of the upper end cover from the rotating shaft through-hole to the annular outer peripheral wall includes a first annular depression, a first annular protrusion, a second annular depression, a second annular protrusion, and a third annular depression from the inside to the outside;

[0021] The upper bearing is located in the first annular depression, the first annular protrusion extends into the space between the upper bearing and the corresponding outer annular protrusion, and the lower surface of the first annular protrusion is close to the upper surface of the inner annular protrusion.

[0022] The preferred technical solution adopted by the present utility model to solve the above technical problems is as follows: the second annular protrusion is embedded in the inner hole of the stator plastic sealing body, a ring-shaped flange is provided at the upper edge of the inner hole of the stator plastic sealing body, and the ring-shaped flange is embedded into the third annular recess.

[0023] The preferred technical solution adopted by the present utility model to solve the above technical problems is as follows: the upper surface of the mounting ear slopes from the inside to the outside and from top to bottom to form an inclined surface, a groove is provided at the inclined surface, and the mounting hole is located in the groove.

[0024] The preferred technical solution adopted by the present utility model to solve the above technical problems is as follows: the inner groove surface of the groove is an arc surface matching the outer diameter of the first annular body.

[0025] The preferred technical solution adopted by the present utility model to solve the above technical problems is as follows: a plurality of balance holes are provided on the outer annular protrusion.

[0026] The preferred technical solution adopted by the present utility model to solve the above technical problems is as follows: a through hole is provided at the bottom of the inner hole of the stator plastic sealing body, a ring-shaped resting portion is provided at the edge of the through hole, the lower end cover includes a cap portion and a flange portion, the cap portion passes through the through hole, and the flange portion is located in the inner hole of the stator plastic sealing body and is in close contact with the ring-shaped resting portion.

[0027] Compared with the prior art, the advantages of the present utility model are as follows: both the plastic-sealed stator and the plastic-sealed rotor of the plastic-sealed motor have shock-proof designs, thus forming an internal and external double shock-proof structure; the fastener is in flexible longitudinal contact with the plastic-sealed motor through the shock-proof member, the fastener is in flexible circumferential contact with the mounting earring through the shock-proof member, and the plastic-sealed motor is in flexible contact with the motor frame through the shock-proof member, so that the components are in flexible contact in multiple dimensions of longitudinal, horizontal, and circumferential directions, effectively improving the seismic resistance of the motor.

[0028] The rotor plastic sealing body is designed to include a rigid plastic sealing portion and an elastic plastic sealing portion, wherein the elastic plastic sealing portion is made of rubber material and thus has a buffer and seismic resistance function. Inner annular protrusions and outer annular protrusions are respectively provided at the upper and lower ends of the rotor plastic sealing body. The inner annular protrusion, as a part of the elastic plastic sealing portion, further enhances the shock absorption performance of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present utility model will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0030] Figure 1 Schematic diagram of a plastic-encased motor with double-layer shock protection inside and outside

[0031] Figure 2 Exploded view of a plastic-encased motor with double-layer shock protection inside and outside

[0032] Figure 3 Schematic of the plastic-encased rotor of a plastic-encased motor with double-layer shock protection inside and outside Figure 1 ;

[0033] Figure 4 Exploded schematic diagram of the plastic housing rotor of a plastic-encased motor with double-layer shock protection inside and outside

[0034] Figure 5 Schematic of the plastic-encased rotor of a plastic-encased motor with double-layer shock protection inside and outside Figure 2 ;

[0035] Figure 6 Schematic of the plastic-encased stator of a plastic-encased motor with double-layer shock protection inside and outside Figure 1 ;

[0036] Figure 7 Schematic of the plastic-encased stator of a plastic-encased motor with double-layer shock protection inside and outside Figure 2 ;

[0037] Figure 8 Schematic of the plastic-encased stator of a plastic-encased motor with double-layer shock protection inside and outside Figure 3 ;

[0038] Figure 9 Schematic diagram of the shock protection component of a plastic-encased motor with double-layer shock protection inside and outside

[0039] Figure 10 Schematic diagram of the upper end cover of a plastic-encased motor with double-layer shock protection inside and outside

[0040] Figure 11 Schematic diagram of the lower end cover of a plastic-encased motor with double-layer shock protection inside and outside Detailed implementation manner

[0041] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present utility model.

[0042] It should be noted that: Similar reference numerals denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it will not be further defined and explained in subsequent drawings.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. The terms "first" and "second" are only for the convenience of description and have no other directional meaning, and cannot be used as a limitation to the present utility model.

[0044] As Figures 1-8 shown, the encapsulated motor in this embodiment includes an encapsulated stator 1 and an encapsulated rotor 2. The encapsulated stator 1 has a cylindrical structure and is composed of a stator winding, a stator core, and a stator encapsulation body 11. The encapsulated rotor 2 includes a rotating shaft 9, a rotor core, annularly distributed permanent magnets, and a rotor encapsulation body 21.

[0045] Both the encapsulated stator 1 and the encapsulated rotor 2 of the encapsulated motor have a shock-proof design, thus forming a double-layer shock-proof structure inside and outside.

[0046] As Figures 1-2 , shown in FIGS. 6-8, the encapsulated stator 1 is provided with a first-layer shock-proof structure. Specifically, a plurality of mounting ears 10 are provided on the outer periphery of the encapsulated stator 1, and mounting holes S parallel to the axis direction of the stator encapsulation body 11 are provided on each mounting ear 10. These mounting holes S are specially designed to include a hole body a and an extension hole b, where the width of the extension hole b is smaller than the diameter of the hole body a and larger than the radius of the hole body a. Such a design allows the installation of the shock-proof member 5 while maintaining the structural stability.

[0047] As Figure 9 shown, a dumbbell-shaped elastic solid structure shock-proof member 5 is detachably provided at the mounting hole S. The shock-proof member 5 includes three annular bodies, namely a first annular body 51, a second annular body 52, and a third annular body 53 from top to bottom. A fastener hole K penetrating both ends is provided at the center of the first annular body 51, the second annular body 52, and the third annular body 53.

[0048] As Figures 1-2 , shown in FIGS. 8-9, preferably, the first annular body 51, the second annular body 52, and the third annular body 53 are coaxial cylindrical structures, and the first annular body 51 and the third annular body 53 have the same diameter. The fastener hole K is a straight through hole.

[0049] Among them, the second annular body 52 enters the hole body a from the extension hole b, the first annular body 51 and the third annular body 53 are located on both sides of the mounting ear 10, and the surfaces of the first annular body 51 and the third annular body 53 opposite to the mounting ear 10 are in close contact with the surface of the mounting ear 10.

[0050] Further preferably, the outer diameter of the second annular body 52 is greater than the width of the extending hole b and less than the diameter of the hole body a; the outer diameters of the first annular body 51 and the third annular body 53 are less than that of the second annular body 52 and greater than the diameter of the hole body a. Thereby, it not only ensures the installation of the shock-proof member 5, but also avoids the detachment of the shock-proof member 5.

[0051] With this design, when the plastic-encapsulated motor is installed on the motor bracket, the fastener passes through the shock-proof member 5 and the threaded hole of the motor bracket, and realizes a fastening connection. It should be noted that due to the longitudinal and circumferential extrusion of the fastener on the shock-proof member 5, the second annular body 52 is tightened in the hole body a.

[0052] At this time, the limiting head of the fastener presses on the first annular body 51, the third annular body 53 is squeezed between the mounting ear 10 and the motor bracket, the fastener is in longitudinal flexible contact with the plastic-encapsulated motor through the shock-proof member 5, the fastener is in circumferential flexible contact with the mounting ear 10 through the shock-proof member 5, and the plastic-encapsulated motor is in flexible contact with the motor bracket through the shock-proof member 5, so that the components are in multi-dimensional flexible contact longitudinally, horizontally and circumferentially, effectively improving the seismic resistance of the motor.

[0053] The plastic-encapsulated rotor 2 is provided with a second-level shock-proof structure, as Figure 3 shown. Specifically, the rotor plastic-encapsulated body 21 is designed to include a rigid plastic-encapsulated part n and an elastic plastic-encapsulated part m. The elastic plastic-encapsulated part is made of rubber material and thus has a buffer and seismic resistance function. Inner annular protrusions 21 and outer annular protrusions 22 are respectively provided at the upper and lower ends of the rotor plastic-encapsulated body 21. The inner annular protrusion 21, as a part of the elastic plastic-encapsulated part, further enhances the shock absorption performance of the rotor. The outer annular protrusion 22 is a part of the rigid plastic-encapsulated part.

[0054] As Figures 2-5 shown, upper bearings 6 and lower bearings 7 are respectively provided at the upper and lower ends of the plastic-encapsulated rotor 2. The outer diameter of the bearings is less than the outer diameter of the inner annular protrusion 21, ensuring that the relative surfaces of the bearing end faces and the rotor plastic-encapsulated body 21 are in flexible contact, improving the seismic resistance performance. At the same time, an upper shock-proof washer V1 is provided between the upper bearing 6 and the upper end cover 3, and a lower shock-proof washer V2 is provided between the lower bearing 7 and the lower end cover 4. These washers further absorb vibrations and reduce noise.

[0055] The synergistic effect of the elastic plastic-encapsulated part and the shock-proof washer improves the shock-proof performance of the plastic-encapsulated rotor 2.

[0056] As Figure 10 shown, the lower surface of the upper end cover 3 is designed with a plurality of annular structures, including annular depressions and protrusions. These structures work together with the elastic plastic-encapsulated part and the shock-proof washer to form a shock-absorbing layer.

[0057] Specifically, as Figure 7 、 10As shown in the figure, the lower surface of the upper end cover 3 from the shaft through hole to the annular outer peripheral wall includes a first annular depression 31, a first annular protrusion 32, a second annular depression 33, a second annular protrusion 34, and a third annular depression 35 from the inside to the outside. The upper bearing 6 is located in the first annular depression 31. The first annular protrusion 32 extends into the space between the upper bearing 6 and the corresponding outer annular protrusion 22, and the lower surface of the first annular protrusion 32 is close to the upper surface of the inner annular protrusion 21. The second annular protrusion 34 is embedded in the inner hole of the stator plastic package 11. There is a ring-shaped flange H at the upper edge of the inner hole of the stator plastic package 11, and the ring-shaped flange H is embedded in the third annular depression 35. The concave-convex design of the upper end cover 3 improves the impact resistance of the end cover. At the same time, the end cover is combined with the plastic-encapsulated rotor 2 and the plastic-encapsulated stator 1 through the concave-convex structure, which also improves the connection stability and firmness and enhances the shock absorption effect.

[0058] The first annular protrusion 32 extends into the space between the upper bearing 6 and the corresponding outer annular protrusion 22, which not only plays a role in supporting and guiding the plastic-encapsulated rotor 2, but also realizes the flexible contact between structures, further improving the shock absorption effect.

[0059] As Figures 6-8 shown in the figure, the upper surface of the mounting ear 10 is designed as an inclined slope D. There is a groove Y on the slope D, and the mounting hole S is located in the groove Y. The inner groove surface of the groove Y is an arc surface u that matches the outer diameter of the first annular body 51. This design not only facilitates the installation and disassembly of the shock-proof part 5, but also enhances the cooperation between the shock-proof part 5 and the mounting ear 10, improving the overall shock absorption effect. The lower surfaces of all mounting ears are flat and at the same height for stable installation.

[0060] As Figure 7 、 11 shown in the figure, there are a plurality of balance holes j on the outer annular protrusion 22, which helps to reduce the unbalance of the rotor and reduce vibration. The edge of the through hole at the bottom of the inner hole of the stator plastic package 11 has an annular resting part g. The cap part 41 of the lower end cover 4 passes through the through hole, and the edge part 42 is in close contact with the annular resting part g. This design enhances the connection stability between the end cover and the stator and provides an additional shock absorption path at the same time.

[0061] A plastic-encapsulated motor with double internal and external shock protection provided by the present invention is introduced. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A plastic-encapsulated motor with double internal and external shockproof, characterized in that Including plastic-encapsulated stator and plastic-encapsulated rotor; The plastic-sealed stator is a cylindrical structure, comprising a stator winding, a stator core and a stator plastic-sealed body; A plurality of mounting ears are arranged on the outer periphery of the stator plastic package body, and the mounting ears are provided with mounting holes parallel to the axial direction of the stator plastic package body; The mounting hole comprises a hole body and an extension hole connected in parallel, wherein the extension hole extends from the hole body to the outer edge of the mounting ear; the width of the extension hole is smaller than the diameter of the hole body and larger than the radius of the hole body; The mounting hole is detachably provided with a shockproof member of an elastic solid structure; the shockproof member is dumbbell-shaped and is provided with an axially penetrating fastener hole, and the shockproof member includes a first annular body, a second annular body and a third annular body; The second annular body enters the hole body from the extension hole, and the first annular body and the third annular body are located on both sides of the mounting ear and are in close contact with the surface of the mounting ear; The plastic-encapsulated rotor comprises a rotating shaft, a rotor core, annularly distributed magnetic steel and a rotor plastic-encapsulated body; The rotor plastic sealing body comprises a rigid plastic sealing part and an elastic plastic sealing part, and the elastic plastic sealing part is made of rubber material; An inner annular protrusion and an outer annular protrusion are respectively provided at the upper and lower ends of the rotor plastic sealing body, and the inner annular protrusion is a part of the elastic plastic sealing part.

2. The plastic-encapsulated motor with double internal and external shock protection according to claim 1 is characterized in that An upper bearing and a lower bearing are respectively disposed at the upper and lower ends of the plastic-sealed rotor, and the outer diameters of the upper bearing and the lower bearing are smaller than the outer diameter of the inner annular protrusion.

3. The plastic-encapsulated motor with double internal and external shock protection according to claim 1 is characterized in that The outer diameter of the second annular body is larger than the width of the extension hole and smaller than the diameter of the hole body; The outer diameters of the first annular body and the third annular body are smaller than the diameter of the second annular body and larger than the diameter of the hole body.

4. The plastic-encapsulated motor with double internal and external shock protection according to claim 2 is characterized in that It comprises an upper end cover and a lower end cover; an upper shockproof washer is arranged between the upper bearing and the upper end cover, and a lower shockproof washer is arranged between the lower bearing and the lower end cover.

5. The plastic-encapsulated motor with double internal and external shock protection according to claim 4 is characterized in that The lower surface of the upper end cover includes, from the rotation shaft through hole to the annular outer peripheral wall, a first annular recess, a first annular protrusion, a second annular recess, a second annular protrusion and a third annular recess from the inside to the outside; The upper bearing is located in the first annular recess, the first annular protrusion extends between the upper bearing and the corresponding outer annular protrusion, and the lower surface of the first annular protrusion is close to the upper surface of the inner annular protrusion.

6. The plastic-encapsulated motor with double internal and external shock protection according to claim 5, characterized in that The second annular protrusion is embedded in the inner hole of the stator plastic-sealed body. An annular flange is provided on the upper edge of the inner hole of the stator plastic-sealed body. The annular flange is embedded in the third annular recess.

7. The plastic-encapsulated motor with double internal and external shock protection according to claim 1 is characterized in that The upper surface of the mounting ear is inclined from inside to outside and from top to bottom to form an inclined surface, and a groove is provided on the inclined surface, and the mounting hole is located in the groove.

8. The plastic-encapsulated motor with double internal and external shock protection according to claim 7, characterized in that The inner groove surface of the groove is an arc surface matching the outer diameter of the first annular body.

9. The plastic-encapsulated motor with double internal and external shock protection according to claim 1, characterized in that The outer annular protrusion is provided with a plurality of balancing holes.

10. The plastic-encapsulated motor with double internal and external shock protection according to claim 4, characterized in that A through hole is provided at the bottom of the inner hole of the stator plastic package body, and an annular shelf portion is provided at the edge of the through hole. The lower end cover includes a cap portion and an edge portion, the cap portion passes through the through hole, and the edge portion is located in the inner hole of the stator plastic package body and is tightly attached to the annular shelf portion.

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