CN220087055U - Motor with a motor housing - Google Patents

Abstract

The utility model provides a motor, which comprises a shell, a rotating shaft and a supporting component. The casing is provided with a cavity. The stator and rotor assembly is arranged in the cavity. The rotating shaft is matched with the stator and rotor assembly, and part of the rotating shaft protrudes out of the cavity. The support assembly includes a bearing and a compression plate. The bearing is arranged on the shell and is in running fit with the rotating shaft in a sleeved mode. One end of the pressing sheet is connected with the shell, the other end of the pressing sheet is propped against the outer ring of the bearing, the bearing is positioned with the shell along the axial direction and the radial direction of the rotating shaft, and the part between the two ends of the pressing sheet extends along a bending path. The motor extends along the bending path between the two ends of the pressing sheet, so that the elastic deformation capacity between the two ends of the pressing sheet is improved, when the motor rotates at a high speed with load, vibration of the rotating shaft such as the vibration of the rotating shaft in the axial direction and the radial direction is absorbed through deformation of the pressing sheet, rigid collision with the casing or the rotating shaft when the vibration of the bearing is large is avoided, the damping effect of the pressing sheet is improved, and the overall service life of the bearing and the motor is prolonged.

Description

Motor with a motor housing

Technical Field

The embodiment of the utility model relates to the field of electric driving, in particular to a motor.

Background

When the motor rotates at a high speed under load, rigid collision is easy to generate when vibration at the bearing is large, and the service life of the motor is influenced.

Disclosure of Invention

In view of the above, the present utility model provides a motor that absorbs bearing vibration to improve the life of the motor.

The utility model provides a motor. The motor comprises a shell, a rotating shaft and a supporting component. The casing is provided with a cavity. The stator and rotor assembly is arranged in the cavity. The rotating shaft is matched with the stator and rotor assembly, and part of the rotating shaft protrudes out of the cavity. The support assembly includes a bearing and a compression plate. The bearing is installed in the casing, and the bearing housing is located the pivot. One end of the pressing sheet is connected with the shell, the other end of the pressing sheet is propped against the outer ring of the bearing, the bearing is positioned with the shell along the axial direction and the radial direction of the rotating shaft, and the part between the two ends of the pressing sheet extends along a bending path.

The motor extends along the bending path between the two ends of the pressing sheet, so that the elastic deformation capacity between the two ends of the pressing sheet is improved, when the motor rotates at a high speed with load, vibration of the rotating shaft such as the vibration of the rotating shaft in the axial direction and the radial direction is absorbed through deformation of the pressing sheet, rigid collision with the casing or the rotating shaft when the vibration of the bearing is large is avoided, the damping effect of the pressing sheet is improved, and the overall service life of the bearing and the motor is prolonged.

In one possible embodiment, the compression sheet comprises a connecting portion and an abutment portion. The connecting part is connected with the shell. The supporting part is arranged on the connecting part and extends along the bending path. One end of the abutting part far away from the connecting part abuts against the outer ring of the bearing. Obviously, in the above embodiment, the motor extends along the bending path at one side of the connecting portion through the abutting portion of the pressing sheet, and the bent abutting portion abuts against the bearing, so that the elastic deformation capacity of the pressing sheet is further improved, the vibration absorbing effect of the pressing sheet is further improved, and when the motor rotates at a high speed with load, the vibration of the rotating shaft is easier to be absorbed.

In one possible embodiment, the pressing piece is in an annular structure, the connecting portion is located at the outer periphery of the abutting portion, and the abutting portion extends along the bending path in the radial direction of the pressing piece.

Obviously, in the above embodiment, the pressing sheet is of an annular structure, so that the pressing sheet is propped against the outer ring of the bearing for a circle, the propping area is increased, and the stability of the support bearing is improved.

In one possible embodiment, the housing includes a housing and a cover coupled to the housing and enclosing a cavity. The connecting part of the pressing piece is connected with the cover body or the shell, and the bearing is clamped by the abutting part of the pressing piece and the cover body or the shell.

Obviously, in the above embodiment, the bearing is clamped between the supporting portion and the cover or the housing, so that the bearing is stably located in the cavity and supports the rotating shaft.

In one possible embodiment, the number of the supporting components is two, namely a first supporting component and a second supporting component, wherein the connecting part of the pressing piece is connected with the cover body, and the bearing is clamped between the supporting part of the pressing piece and the cover body. In the second support assembly, the connecting part of the pressing sheet is connected to the shell, and the bearing is clamped between the supporting part of the pressing sheet and the shell.

Obviously, in the above embodiment, the two supporting components support the bearing and the rotating shaft at intervals, and the supporting parts of the pressing sheets deform to absorb the vibration of the rotating shaft and the bearing at the two intervals of the rotating shaft, so that the vibration of the bearing is reduced, and the running stability of the rotating shaft is improved.

In one possible embodiment, the casing is further provided with an oil chamber, which communicates with the cavity and is located on the circumferential side of the bearing.

Obviously, in the above embodiment, the oil supplementing member may be placed in the oil chamber, and the oil supplementing member may be a structure for providing lubricating oil for the bearing, such as a felt or grease. The oil supplementing piece in the oil cavity can provide lubricating oil for the bearing, so that the problem of dry grinding of the bearing and the rotating shaft is avoided, and the service life of the bearing is prolonged.

In one possible embodiment, a space is provided between the housing and the bearing, and the outer peripheral walls of the compression plate, the housing and the bearing are provided with oil cavities.

Obviously, in the above embodiment, the casing provides space for the oil cavity, and the pressing sheet, the casing and the bearing enclose to form the oil cavity, so that a cavity is not required to be separately arranged, and the structure is simple.

In one possible embodiment, the motor further comprises an insulating paper disposed on a side of the support assembly facing away from the oil chamber.

Obviously, in the above embodiment, the insulating paper is disposed on the side of the support component facing away from the oil cavity, so that the lubricating oil provided by the oil supplementing piece can be further prevented from flowing to the stator and rotor components.

In one possible embodiment, the connection portion includes opposite first and second sides, the first side of the connection portion being connected to the housing. The tablet further comprises a switching part, one end of the switching part is connected to the connecting part, and the other end of the switching part extends to the second side of the connecting part. One end of the supporting part is connected to one side of the switching part, which is away from the connecting part, and the other end extends to the first side of the connecting part.

Obviously, in the above embodiment, one end of the abutting portion is connected to one side of the adapting portion, which is away from the connecting portion, and the other end extends to the first side of the connecting portion, so that the cross section of the pressing sheet along the radial direction is approximately wavy, and the elastic deformation capability of the abutting portion is improved.

In one possible embodiment, the housing comprises a first and a second connected and intersecting chamber wall, the first chamber wall facing the bearing and being located on the outer circumferential side of the bearing. The connecting portion is connected to the second cavity wall, and two opposite sides of the supporting portion are respectively abutted to the first cavity wall and the bearing.

Obviously, in the above embodiment, the first cavity wall provides support for the supporting portion, so that the strength of the supporting portion for supporting the bearing is improved, and the running stability of the bearing and the rotating shaft is improved.

In one possible embodiment, the contour of the outer peripheral wall of the bearing along the radial section is arc-shaped, and the casing includes an arc-shaped cavity wall, and the arc-shaped cavity wall and the abutting portion abut against the bearing in opposite directions.

Obviously, in the above embodiment, the arc-shaped cavity wall and the abutting part are abutted against the bearing in opposite directions, so that the arc-shaped cavity wall and the abutting part can provide clamping force for the bearing along the axial direction and the radial direction, and the bearing is positioned.

In one possible embodiment, the abutment is in surface contact with the bearing.

Obviously, in the above embodiment, the abutting portion of the pressing piece is in surface contact with the bearing, so as to increase the area of the casing and the pressing piece for respectively pressing the bearing, so as to improve the stability of the bearing, and reduce the pressure of the bearing in unit area, so as to improve the service life of the bearing.

In one possible embodiment, the contour of the peripheral wall of the bearing along the radial section is a straight line, the abutting portion comprises a first contact surface and a second contact surface which are connected, the casing comprises a third cavity wall and a fourth cavity wall, the first contact surface and the third cavity wall abut against the peripheral wall of the bearing respectively, and the second contact surface and the fourth cavity wall abut against opposite sides of the bearing respectively.

Obviously, in the above embodiment, when the contour of the outer peripheral wall of the bearing along the radial section is a straight line, the first contact surface and the second contact surface of the abutting portion respectively cooperate with the third cavity wall and the fourth cavity wall of the casing to abut against the bearing, so that the bearing is positioned along the axial direction and the radial direction.

Drawings

Fig. 1 is a schematic diagram of an electric motor according to an embodiment of the present utility model.

Fig. 2 is an exploded, cross-sectional schematic view of the motor shown in fig. 1.

Fig. 3 is an assembled schematic view of the cover, support assembly and oil refill of the motor of fig. 2.

Fig. 4 is a schematic assembly view of the housing, support assembly and oil refill of the motor of fig. 2.

Fig. 5 and 6 are schematic views illustrating assembly of the housing and the compression sheet in the motor of fig. 1, respectively, in other embodiments.

Description of the main reference signs

Electric machine 100

Case 10

Housing 11

Cover 13

Cavity 101

Oil chamber 103

First chamber wall 1011

Second chamber wall 1013

Arc cavity wall 1015

Third cavity wall 1017

Fourth chamber wall 1019

Stator and rotor assembly 20

Stator assembly 21

Rotor assembly 23

Rotating shaft 30

First support assembly 40

Second support assembly 40a

Bearings 41, 41a

Tabletting 43

Connection portion 431

First side 4311

Second side 4313

Adapter 433

Abutment 435

First contact surface 4351

Second contact surface 4353

Carbon brush assembly 50

Oil replenishing piece 60

Insulating paper 70

The utility model will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

In order to further illustrate the technical means and effects adopted by the present utility model to achieve the purpose of the predetermined application, the following description is made with reference to the accompanying drawings and the implementation, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The utility model provides a motor. The motor comprises a shell, a rotating shaft and a supporting component. The casing is provided with a cavity. The stator and rotor assembly is arranged in the cavity. The rotating shaft is matched with the stator and rotor assembly, and part of the rotating shaft protrudes out of the cavity. The support assembly includes a bearing and a compression plate. The bearing is installed in the casing, and the bearing housing is located the pivot. One end of the pressing sheet is connected with the shell, the other end of the pressing sheet is propped against the outer ring of the bearing, the bearing is positioned with the shell along the axial direction and the radial direction of the rotating shaft, and the part between the two ends of the pressing sheet extends along a bending path.

The bending path is a path excluding a path extending along a straight line and a plane, for example, the bending path is a path extending along a curve, a path extending along a folding line, a path extending along a combination of a curve and a straight line, or the like. In some embodiments of the present utility model, the cross-sectional profile of the compression sheet is configured in a "W" shape or a "V" shape or a wavy line shape, so that the compression sheet can be extended to a certain extent when receiving pressure from the bearing, and the more the compression sheet is bent, the higher the elastic damping effect thereof is.

The motor extends along the bending path between the two ends of the pressing sheet, so that the elastic deformation capacity between the two ends of the pressing sheet is improved, when the motor rotates at a high speed with load, vibration of the rotating shaft such as the vibration of the rotating shaft in the axial direction and the radial direction is absorbed through deformation of the pressing sheet, rigid collision with the casing or the rotating shaft when the vibration of the bearing is large is avoided, the damping effect of the pressing sheet is improved, and the overall service life of the bearing and the motor is prolonged.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a motor 100. The motor 100 includes a housing 10, a stator-rotor assembly 20, a rotating shaft 30, and a support assembly. The housing 10 is provided with a cavity 101. The support assembly and the positioning rotor assembly 23 are respectively disposed in the cavity 101. The support assembly serves to support and position the rotating shaft 30 in the axial and radial directions of the rotating shaft 30. Part of the rotating shaft 30 is rotatably arranged in the cavity 101 and is matched with the stator-rotor assembly 20, and the rotating shaft 30 is driven to rotate by electrifying the stator-rotor assembly 20. The other part of the rotation shaft 30 protrudes outside the casing 10 for connecting a structure (e.g., an external shaft, not shown) driven to rotate by the motor 100.

The support assembly includes a bearing 41 and a compression plate 43. The presser 43 is attached to the casing 10. The bearing 41 is mounted to the housing 10 to position the bearing 41 within the cavity 101. One end of the pressing piece 43 is connected to the casing 10, and the other end abuts against the bearing 41. The portion between the two ends of the pressing piece 43 extends along a bending path. The portion of the folded presser 43 increases the elastic deformability. The pressing piece 43 is matched with the casing 10 to support the bearing 41, so that the bearing 41 is positioned along the axial direction and the radial direction of the rotating shaft 30.

When the motor 100 rotates at a high speed with load, vibration of the rotating shaft 30, such as vibration of the rotating shaft in the axial direction and the radial direction, is absorbed through deformation of the pressing piece 43, so that rigid collision with the casing 10 or the rotating shaft 30 when the vibration of the bearing 41 is large is avoided, the damping effect of the pressing piece 43 is improved, and the overall service life of the bearing 41 and the motor 100 is further prolonged.

The presser 43 includes a connection portion 431 and a holding portion 435. The connecting portion 431 is located at one end of the pressing piece 43, and one end of the abutting portion 435 facing away from the connecting portion 431 abuts against the bearing 41. The connection portion 431 is connected to the casing 10, and for example, the connection portion 431 may be fixedly connected to the casing 10 by welding or riveting. One end of the supporting portion 435 is connected to the connecting portion 431, and the other end extends along a curved line or a fold line. In one embodiment, the abutment 435 extends along a U-shaped curved path, but is not limited thereto. For example, in other embodiments, the abutment 435 may extend along other curved paths such as S-shaped and oval, or along a zigzag path such as V-shaped and M-shaped. The abutment 435 abuts against the outer peripheral wall of the bearing 41 to provide an abutment force with the cavity wall of the housing 10 to the bearing 41 along the axial direction and the radial direction of the rotating shaft 30, so that the bearing 41 is clamped between the pressing piece 43 and the housing 10, and the bearing 41 is positioned in the cavity 101.

The presser 43 is elastically deformable. In one embodiment, the pressing sheet 43 is made of stainless steel, but is not limited thereto. For example, in other embodiments, the pressing piece 43 may be made of other metals such as spring steel.

The motor 100 extends along curved or broken lines and other bending paths at one side of the connecting part 431 through the abutting part 435 of the pressing piece 43, so that the elastic deformation capability of the pressing piece 43 is further improved, when the motor 100 rotates at a high speed with load, vibration of the rotating shaft 30, such as vibration of the rotating shaft 30 in the axial direction and the radial direction, is absorbed through deformation of the abutting part 435, rigid collision with the casing 10 or the rotating shaft 30 when the vibration of the bearing 41 is large is avoided, the damping effect of the pressing piece 43 is improved, and the overall service lives of the bearing 41 and the motor 100 are further prolonged.

The casing 10 includes a housing 11 and a cover 13. The cover 13 is sealed at one side of the housing 11, and forms a cavity 101 with the housing 11. The stator-rotor assembly 20 includes a stator assembly 21 and a rotor assembly 23. The stator assembly 21 is disposed in the housing 11, and the rotor assembly 23 is connected to the rotating shaft 30 and is disposed inside the stator assembly 21. The rotor assembly 23 cooperates with the stator assembly 21 to achieve synchronous rotation of the drive shaft 30 and the rotor assembly 23 using electromagnetic induction.

In one embodiment, the number of support members is two. The two support members support the rotation shaft 30 at intervals. The two support assemblies include a first support assembly 40 and a second support assembly 40a. The first support assembly 40 is located between the positioning rotor assembly 23 and the cover 13, and the second support assembly 40a is located between the stator rotor assembly 20 and the housing 11. As shown in fig. 3, in the first support assembly 40, the connection portion 431 of the pressing piece 43 is connected to the cover 13, and the bearing 41 is sandwiched between the holding portion 435 of the pressing piece 43 and the cover 13. As shown in fig. 4, in the second support assembly 40a, the connection portion 431 of the pressing piece 43 is connected to the housing 11, and the bearing 41 is sandwiched between the holding portion 435 of the pressing piece 43 and the housing 11.

Referring to fig. 3 and 4, in one embodiment, the outline of the outer peripheral wall of the radial cross section of the outer peripheral wall of the bearing 41 is arc-shaped. The cover 13 and the housing 11 each include an arcuate cavity wall 1015. The arc-shaped cavity wall 1015 and the abutting portion 435 abut against the bearing 41 in opposite directions. In the first support assembly 40, the arc-shaped cavity wall 1015 of the cover 13 is located at one side of the bearing 41 away from the stator-rotor assembly 20, the direction of the axial supporting force provided by the arc-shaped cavity wall 1015 of the cover 13 and the supporting portion 435 of the pressing piece 43 is opposite, and the radial supporting force of the bearing 41 is provided by the arc-shaped cavity wall 1015 of the cover 13 and the supporting portion 435 of the pressing piece 43 along the circumferential direction. In the second support assembly 40a, the arcuate cavity wall 1015 of the housing 11 is located on the side of the bearing 41 facing away from the positioning rotor assembly 23. The arc-shaped cavity wall 1015 of the housing 11 and the abutting portion 435 of the pressing piece 43 respectively provide axial abutting force of the bearing 41 in opposite directions, and the arc-shaped cavity wall 1015 of the housing 11 and the abutting portion 435 of the pressing piece 43 respectively provide radial abutting force of the bearing 41 in circumferential directions.

The arc chamber walls 1015 of the housing 11 and the cover 13 are respectively in surface contact with the bearing 41 to increase the area of the housing 10 and the pressing piece 43 respectively pressing the bearing 41 to improve the stability of the bearing 41, and reduce the pressure per unit area born by the bearing 41 to improve the service life of the bearing 41.

It will be appreciated that in other embodiments, the abutment 435 may also be in line contact with the bearing 41, i.e. the abutment 435 is tangential to the peripheral wall of the bearing 41.

It will be appreciated that in other embodiments, the outline of the outer peripheral wall of the cross section of the bearing 41aa in the radial direction is a straight line, for example, as shown in fig. 5, the abutment 435 of the pressing piece 43 includes a first contact surface 4351 and a second contact surface 4353. The cover 13 and the housing 11 of the casing 10 include a third cavity wall 1017 and a fourth cavity wall 1019, respectively. The third cavity wall 1017 of the cover 13 and the first contact surface 4351 of the first support assembly 40 respectively abut against the outer peripheral wall of the bearing 41a, the fourth cavity wall 1019 of the cover 13 and the second contact surface 4353 of the first support assembly 40 respectively abut against opposite sides of the bearing 41a, and the pressing piece 43 of the cover 13 and the first support assembly 40 provide axial and radial abutting force of the bearing 41a so as to position the bearing 41 a. The first contact surface 4351 of the housing 11 and the first contact surface 4351 of the second support assembly 40a respectively abut against the outer peripheral wall of the bearing 41a, the fourth cavity wall 1019 of the housing 11 and the second contact surface 4353 of the second support assembly 40a respectively abut against opposite sides of the bearing 41a, and the pressing pieces 43 of the housing 11 and the second support assembly 40a provide axial and radial abutting forces of the bearing 41a to position the bearing 41 a.

Referring to fig. 3 and 4, the connection portion 431 includes a first side 4311 and a second side 4313 opposite to each other. The first side 4311 of the connecting portion 431 of the first supporting component 40 is connected to the cover 13. The first side 4311 of the connector in the second support assembly 40a is coupled to the housing 11. The compression sheet 43 also includes a transition 433. The adapter 433 is connected between the connection 431 and the abutment 435. One end of the adapter 433 is connected to the connection portion 431, and the other end extends to the second end of the connection portion 431. One end of the abutting part 435 is connected to one side of the switching part 433 away from the connecting part 431, and the other end extends to the first side 4311 of the connecting part 431, so that the cross section of the pressing piece 43 along the radial direction is approximately wavy, and the elastic deformation capability of the abutting part 435 is improved. It should be understood that in other embodiments, the transferring portion 433 may be omitted, the supporting portion 435 is directly disposed at one end of the connecting portion 431 and extends along a curved or broken line path, and the supporting portion 435 is elastically deformed under force to counteract the vibration of the bearing 41.

The housing 10 includes intersecting first and second chamber walls 1011 and 1013, respectively. For example, as shown in fig. 3, the cover 13 includes a first cavity wall 1011 and a second cavity wall 1013 intersecting; as shown in fig. 4, the housing 11 includes a first chamber wall 1011 and a second chamber wall 1013 that intersect. The first cavity wall 1011 faces the bearing 41, and is located on the outer peripheral side of the bearing 41. In one embodiment, the first chamber wall 1011 is perpendicular to the second chamber wall 1013, but is not limited thereto. The connection portion 431 is connected to the second cavity wall 1013, and the supporting portion 435 is supported on the second cavity wall 1013, that is, opposite sides of the supporting portion 435 are respectively supported on the first cavity wall 1011 and the bearing 41, the first cavity wall 1011 provides a supporting force for the supporting portion 435, so that the force of the pressing piece 43 against the bearing 41 is improved, and further the strength of the supporting portion 435 supporting the bearing 41 is improved, so as to improve the operation stability of the bearing 41 and the rotating shaft 30.

The connection portion 431 is disposed on the first cavity wall 1011, and the abutting portion 435 is located on a side of the second cavity wall 1013 facing the bearing 41, so that the connection portion 431 is prevented from occupying a space between the second cavity wall 1013 and the bearing 41, and further, an occupied space of an extension path of the abutting portion 435 is increased, so that an elastic deformation capability of the abutting portion 435 is improved, and further, a damping effect of the compression sheet 43 is improved.

It is understood that in other embodiments, the connection portion 431 may be disposed on the first cavity wall 1011 to increase the space between the first cavity wall 1011 and the bearing 41, so as to increase the occupied space of the extending path of the abutment portion 435.

It is understood that in other embodiments, the included angle between the first chamber wall 1011 and the second chamber wall 1013 may be other angles such as 60 °, 120 °.

It will be appreciated that in other embodiments, the abutment 435 may not contact the first chamber wall 1011, as shown in FIG. 6.

Referring to fig. 2, in an embodiment, the motor 100 is a dc brush motor 100, and the motor 100 further includes a carbon brush assembly 50. The carbon brush assembly 50 is disposed on a side of the stator-rotor assembly 20 facing the cover 13.

It can be appreciated that in other embodiments, the motor 100 may be a brushless dc motor 100, an ac motor 100, or the like, and the motor 100 provided by the present utility model can deform to counteract the vibration amount of the rotating shaft 30 and the bearing 41 when the supporting portion 435 of the pressing sheet 43 extends along a curved or broken line path, so as to avoid the bearing 41 from being subjected to rigid impact, and further improve the service life of the bearing 41.

Referring to fig. 3 and 4, the lubricant loss of the bearing 41 is large, when the lubricant is not supplied sufficiently, the spindle 30 and the bearing 41 are dry-ground, causing noise and even abrasion of the bearing 41, and in order to solve this problem, the casing 10 of the present utility model is provided with the oil chamber 103, the oil chamber 103 communicates with the chamber 101, and the oil chamber 103 is located at the peripheral side of the bearing 41. The oil chamber 103 houses an oil replenishing member 60, and the oil replenishing member 60 may be a structure for supplying lubricating oil to the bearing 41 by felt, grease, or the like. The oil supplementing member 60 in the oil cavity 103 can provide lubricating oil for the bearing 41, so that the problem of dry grinding of the bearing 41 and the rotating shaft 30 is avoided, and the service life of the bearing 41 is prolonged.

Specifically, a space is provided between the cover 13 and the bearing 41 of the first support assembly 40, and an oil cavity 103 is formed by the cover 13, the pressing piece 43 of the first support assembly 40 and the outer peripheral wall of the bearing 41, as shown in fig. 3. The housing 11 and the outer peripheral wall of the bearing 41 have a space therebetween, and the housing 11 and the outer peripheral wall of the bearing 41 and the presser 43 of the second support member 40a form another oil chamber 103, as shown in fig. 4.

It will be appreciated that in other embodiments, the contact portion between the pressing piece 43 and the abutment portion 435 may be divided into a plurality of portions along the circumferential direction of the bearing 41, so as to increase the deformability of the abutment portion 435, and an oil blocking structure (not shown) may be disposed on the side of the bearing 41 and the pressing piece 43 facing away from the oil cavity 103.

The preforming 43 supports and holds in the periphery wall of bearing 41, can separate oil pocket 103 and cavity 101, and preforming 43 is located the one side that the piece 60 deviates from lid 13, can prevent the lubricating oil that the piece 60 provided to the preforming 43 to deviate from the one side of piece 60, and then prevents lubricating oil to flow to carbon brush subassembly 50, stator rotor subassembly 20.

Referring to fig. 2, the motor 100 further includes two insulating papers 70. The insulating paper 70 is disposed on a side of the support assembly facing away from the oil cavity 103, so as to further prevent the lubricating oil provided by the oil supplementing member 60 from flowing to the carbon brush assembly 50 and the stator-rotor assembly 20. One of the insulating papers 70 is disposed between the first support assembly 40 and the carbon brush assembly 50, and the other insulating paper 70 is disposed between the second support assembly 40a and the stator-rotor assembly 20.

The motor 100 extends along a curve or a fold line through the supporting part 435 of the pressing sheet 43, so that the elastic deformation capability of the supporting part 435 is improved, when the motor 100 rotates at a high speed with load, the vibration of the rotating shaft 30 is absorbed through the deformation of the supporting part 435, the rigid collision with the casing 10 or the rotating shaft 30 when the vibration of the bearing 41 is larger is avoided, the damping effect of the pressing sheet 43 is improved, and the overall service life of the bearing 41 and the motor 100 is further prolonged.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and substance of the technical solution of the present utility model.

Claims (11)

1. An electric machine, comprising:

a housing provided with a cavity;

the stator and rotor assembly is arranged in the cavity;

the rotating shaft is matched with the stator and rotor assembly, and part of the rotating shaft protrudes out of the cavity;

the support assembly comprises a bearing and a pressing sheet, the bearing is arranged on the shell, and the bearing is sleeved on the rotating shaft;

the method is characterized in that: one end of the pressing sheet is connected with the shell, the other end of the pressing sheet is propped against the outer ring of the bearing, the pressing sheet and the shell are used for positioning the bearing along the axial direction and the radial direction of the rotating shaft, and the part between the two ends of the pressing sheet extends along a bending path;

the pressing piece comprises a connecting part and a supporting part; the connecting part is connected with the shell; the supporting part is arranged on the connecting part and extends along the bending path; one end of the abutting part far away from the connecting part abuts against the outer ring of the bearing;

the casing comprises a first cavity wall and a second cavity wall which are connected and intersected, wherein the first cavity wall faces the bearing and is positioned on the outer periphery side of the bearing;

the connecting part is connected with the second cavity wall, and two opposite sides of the abutting part are respectively abutted with the first cavity wall and the bearing.

2. An electric machine as claimed in claim 1, characterized in that: the pressing piece is of an annular structure, the connecting portion is located on the periphery of the abutting portion, and the abutting portion extends along a bending path in the radial direction of the pressing piece.

3. An electric machine as claimed in claim 1, characterized in that: the shell comprises a shell body and a cover body, wherein the cover body is connected with the shell body and encloses the cavity;

the connecting part of the pressing piece is connected with the cover body or the shell, and the bearing is clamped by the abutting part of the pressing piece and the cover body or the shell.

4. A motor as claimed in claim 3, characterized in that: the number of the support assemblies is two, namely a first support assembly and a second support assembly, wherein in the first support assembly, the connecting part of the pressing sheet is connected with the cover body, and the bearing is clamped by the abutting part of the pressing sheet and the cover body; in the second supporting component, the connecting part of the pressing piece is connected to the shell, and the supporting part of the pressing piece and the shell clamp the bearing.

5. An electric machine as claimed in any one of claims 1 to 4, characterized in that: the shell is also provided with an oil cavity which is communicated with the cavity and is positioned on the periphery of the bearing.

6. An electric machine as claimed in claim 5, characterized in that: the shell and the bearing are provided with a space, and the periphery walls of the pressing sheet, the shell and the bearing are provided with the oil cavity.

7. An electric machine as claimed in claim 5, characterized in that: the motor further comprises insulating paper, and the insulating paper is arranged on one side, deviating from the oil cavity, of the supporting component.

8. An electric machine as claimed in any one of claims 2 to 4, characterized in that: the connecting part comprises a first side and a second side which are opposite, and the first side of the connecting part is connected with the shell;

the pressing piece further comprises a switching part, one end of the switching part is connected to the connecting part, and the other end of the switching part extends to the second side of the connecting part;

one end of the supporting part is connected to one side of the switching part, which is away from the connecting part, and the other end extends to the first side of the connecting part.

9. An electric machine as claimed in any one of claims 2 to 4, characterized in that: the contour of the peripheral wall of the radial section of the bearing is arc-shaped, the shell comprises an arc-shaped cavity wall, and the arc-shaped cavity wall and the abutting part are abutted against the bearing in opposite directions.

10. An electric machine as claimed in any one of claims 2 to 4, characterized in that: the abutting part is in surface contact with the bearing.

11. An electric machine as claimed in any one of claims 2 to 4, characterized in that: the contour of the peripheral wall of the radial section of the bearing is a straight line, the supporting part comprises a first contact surface and a second contact surface which are connected, the casing comprises a third cavity wall and a fourth cavity wall, the first contact surface and the third cavity wall are respectively supported on the peripheral wall of the bearing, and the second contact surface and the fourth cavity wall are respectively supported on two opposite sides of the bearing.