Bearing positioning ventilation structure and motor

Abstract

The invention discloses a bearing positioning ventilation structure and a motor, and the bearing positioning ventilation structure comprises a through hole which is formed by connecting a first contour, a second contour and a third contour of which the diameters are sequentially decreased from the interior of a housing to the exterior of the housing, a first groove, a second groove and a third groove are concavely formed in the inner sides of the first contour, the second contour and the third contour respectively, and the three grooves are sequentially communicated to form a ventilation channel for communicating the inside and the outside of the shell; the periphery of the bearing baffle ring is fixedly matched with the inner side of the first outline; and the periphery of the outer ring of the first bearing is in contact fit with the inner side of the second outline and is propped against and limited between a step surface formed between the second outline and the third outline and the bearing baffle ring. The motor ventilation structure can communicate the inside and the outside of the motor to realize ventilation of the motor, so that axial movement of the bearing is prevented, and normal work of the motor is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more specifically to a bearing positioning and ventilation structure and a motor. Background Art

[0002] The core components of the motor are the stator and the rotor. When the stator winding is energized, it generates electromagnetic force to drive the rotor to rotate, making the motor run. During the operation of the motor, the stator winding generates heat. If the pressure difference between the inside and outside of the motor is too large, a large pressure difference will be generated between the inner and outer rings of the bearing on the shaft in the axial direction, causing the bearing to move axially, thus affecting the normal use of the motor.

[0003] In summary, how to connect the inside and outside of the motor to achieve ventilation of the motor, thereby preventing the bearing from axial movement, is a problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a bearing positioning and ventilation structure and a motor, wherein the bearing positioning and ventilation structure can connect the inside and outside of the motor to achieve ventilation of the motor, thereby preventing axial movement of the bearing and ensuring normal operation of the motor.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A bearing positioning and ventilation structure, used to be arranged inside a housing, the bearing positioning and ventilation structure comprising:

[0007] A through hole is formed by connecting a first contour, a second contour and a third contour whose diameters decrease in sequence from the inside of the housing to the outside thereof, wherein the first contour, the second contour and the third contour are respectively provided with a first groove, a second groove and a third groove on their inner sides, wherein the first groove communicates with the inside of the housing, the second groove communicates with the first groove and the third groove, and the third groove communicates with the outside of the housing;

[0008] A bearing retaining ring, the outer periphery of which is fixedly matched with the inner side of the first contour;

[0009] A first bearing, wherein the outer periphery of the outer ring of the first bearing contacts and fits with the inner side of the second contour, and abuts between a step surface formed between the second contour and the third contour and the bearing retaining ring.

[0010] Preferably, any two or all of the first groove, the second groove and the third groove are staggeredly arranged around the circumference of the housing.

[0011] Preferably, the first groove and the second groove are staggered around the circumference of the housing, and the first groove and the second groove are connected through a first intermediate channel.

[0012] Preferably, the first intermediate channel is arranged on a step surface formed between the first contour and the second contour.

[0013] Preferably, an end face of the first bearing adjacent to the bearing retaining ring extends into the first contour and abuts against the bearing retaining ring, and the step surface formed between the first contour and the second contour, the outer periphery of the outer ring of the first bearing, the end face of the bearing retaining ring adjacent to the first bearing and the inner side of the first contour form the first intermediate channel.

[0014] Preferably, the second groove and the third groove are staggered around the circumference of the housing, and a second intermediate channel connecting the second groove and the third groove is provided on the step surface formed between the second contour and the third contour.

[0015] Preferably, the first groove penetrates the first contour along the axial direction of the housing, and the second groove penetrates the second contour along the axial direction of the housing.

[0016] Preferably, the third groove penetrates the third contour along the axial direction of the housing, or one end of the third groove is connected to the second groove and the other end extends along the radial direction of the housing to penetrate the inner side of the third contour.

[0017] Preferably, the bearing retaining ring is provided with a plurality of mounting holes for inserting a jig for tightening and assembling, and the mounting holes may or may not penetrate the bearing retaining ring in the axial direction.

[0018] A motor comprises the bearing positioning and ventilation structure described in any one of the above items, and also comprises a casing, a rotating shaft, a rotor and a stator, wherein the rotating shaft is passed through the first bearing and is loosely matched with the first bearing, the rotor is sleeved on the rotating shaft, and the stator is arranged on the casing around the outer circumference of the rotor and is loosely matched with the rotor.

[0019] The bearing positioning and ventilation structure provided by the present invention has a first groove, a second groove and a third groove respectively formed on the inner sides of the first contour, the second contour and the third contour. The interior of the casing, the first groove, the second groove and the third groove are connected with the exterior of the casing in sequence to form a ventilation channel connecting the inside and outside of the casing, so as to achieve ventilation of the motor and balance the pressure inside and outside the motor, thereby preventing the bearing from axial movement and affecting the normal operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the appearance structure of the first motor with a bearing positioning and ventilation structure provided by the present invention;

[0022] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0023] Figure 3 for Figure 1 A schematic diagram of a ventilation channel in a housing;

[0024] Figure 4 A cross-sectional view of a second motor with a bearing positioning and ventilation structure provided by the present invention;

[0025] Figure 5 for Figure 4 A schematic diagram of a ventilation channel in a housing;

[0026] Figure 6 A schematic diagram of the external structure of a third motor with a bearing positioning and ventilation structure provided by the present invention;

[0027] Figure 7 for Figure 6 A partial enlarged view of the air permeable channel;

[0028] Figure 8 A schematic diagram of the outer structure of the casing;

[0029] Fig. 9 A schematic diagram of the appearance structure of a first bearing retaining ring provided by the present invention;

[0030] Fig.10 A schematic diagram of the appearance structure of a second bearing retaining ring provided by the present invention;

[0031] Fig.11 A schematic diagram of the appearance structure of a third bearing retaining ring provided by the present invention;

[0032] Fig.12 A schematic diagram of the appearance structure of a fourth bearing retaining ring provided by the present invention;

[0033] Fig.13 A schematic diagram of the appearance structure of the rotating shaft provided by the present invention;

[0034] Fig.14 for Fig.13 Sectional view at the middle BB;

[0035] Fig.15 A schematic diagram of the appearance structure of the end cover provided by the present invention;

[0036] Fig.16 for Fig.15 Cross-sectional view at CC.

[0037] Reference numerals:

[0038] 1-housing; 11-through hole; 111-first profile; 112-second profile; 113-third profile; 1111-first groove; 1121-second groove; 1131-third groove; 12-fourth profile; 121-fourth step structure; 13-first middle channel; 14-second middle channel; I-air permeable channel;

[0039] 2- stator;

[0040] 3-Rotor;

[0041] 4-rotating shaft; 41-a profile; 42-b profile; 43-c profile; 44-first step structure; 45-second step structure;

[0042] 5-bearing retaining ring; 51-mounting hole;

[0043] 6- first bearing;

[0044] 7- second bearing;

[0045] 8-end cover; 81-d profile; 82-e profile; 83-third step structure;

[0046] 9- elastic member;

[0047] 10- Ribs. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0049] The core of the present invention is to provide a bearing positioning and ventilation structure and a motor. The bearing positioning and ventilation structure can connect the inside and outside of the motor to achieve ventilation of the motor, thereby preventing the bearing from axial movement and ensuring the normal operation of the motor.

[0050] Please refer to Figures 1 to 3In a specific embodiment, the bearing positioning and ventilation structure provided in the present application is used to be arranged inside the casing 1, and includes a through hole 11, a bearing retaining ring 5 and a first bearing 6.

[0051] The through hole 11 is formed by connecting a first contour 111, a second contour 112 and a third contour 113, the diameters of which decrease in sequence from the inside of the housing 1 to the outside thereof. Preferably, the first contour 111, the second contour 112 and the third contour 113 are all cylindrical. The inner sides of the first contour 111, the second contour 112 and the third contour 113 are respectively concavely provided with a first groove 1111, a second groove 1121 and a third groove 1131. The first groove 1111 is connected to the inside of the housing 1, the second groove 1121 is connected to the first groove 1111 and the third groove 1131, and the third groove 1131 is connected to the outside of the housing 1.

[0052] The outer periphery of the bearing retaining ring 5 is fixedly fitted with the inner side of the first profile 111 , and the outer periphery of the outer ring of the first bearing 6 is in contact with the inner side of the second profile 112 , and abuts against the step surface formed between the second profile 112 and the third profile 113 and the bearing retaining ring 5 .

[0053] It can be understood that the first bearing 6 is generally sleeved on the rotating shaft 4, that is, the inner circumference of the inner ring of the first bearing 6 contacts and cooperates with the outer circumference of the rotating shaft 4, and combined with the outer circumference of the outer ring of the first bearing 6 and the inner side of the second profile 112, the radial movement of the first bearing 6 can be effectively limited. Since the diameter of the third profile 113 is smaller than the diameter of the second profile 112, the junction where the second profile 112 and the third profile 113 are connected has a step surface, and the two opposite end surfaces of the first bearing 6 and the bearing retaining ring 5 abut against each other, and the end surface of the first bearing 6 away from the bearing retaining ring 5 abuts against this step surface, which can effectively limit the axial movement of the first bearing 6. In this way, the bearing retaining ring 5 axially limits the first bearing 6 in the through hole 11, so that the first bearing 6 firmly supports the rotating shaft 4 inside the housing 1.

[0054] In the bearing positioning and ventilation structure in the above embodiment, the inner sides of the first contour 111, the second contour 112 and the third contour 113 are respectively concavely provided with a first groove 1111, a second groove 1121 and a third groove 1131, and the interior of the casing 1, the first groove 1111, the second groove 1121, the third groove 1131 and the exterior of the casing 1 are connected in sequence to form a ventilation channel I connecting the inside and outside of the casing 1, so as to realize ventilation of the motor and balance the internal and external pressures of the motor, thereby preventing the bearing from axial movement and affecting the normal operation of the motor.

[0055] In addition, the first groove 1111, the second groove 1121 and the third groove 1131 are concavely arranged on the inner side of the first contour 111, the inner side of the second contour 112 and the inner side of the third contour 113. On the one hand, the air permeable channel I is arranged along the distribution path of the bearing retaining ring 5 and the first bearing 6, which can quickly discharge the hot air flow accumulated on the bearing side inside the housing 1, so that the air pressure at the position near the bearing inside the housing 1 is quickly reduced, thereby better avoiding the phenomenon of axial movement of the bearing caused by the different pressure difference between the inside and outside of the bearing; on the other hand, compared with the conventional air permeable channel I with a circular radial cross-section, each groove is processed through the inner side of the die-casting contour, and each groove has a notch and is not a closed structure. Therefore, when disassembling, replacing or repairing the first bearing 6 and the bearing retaining ring 5, it is convenient to clean the air permeable channel I to avoid the accumulation of external impurities in the air permeable channel I and affecting the ventilation function of the motor.

[0056] On the basis of the above embodiment, any two or all of the first groove 1111 , the second groove 1121 and the third groove 1131 are staggeredly arranged around the circumference of the housing 1 .

[0057] That is to say, the first groove 1111, the second groove 1121 and the third groove 1131 are arranged in sequence from the inside to the outside of the casing 1, and any two or all of them are staggered around the circumference of the casing 1. Therefore, the inside of the casing 1, the first groove 1111, the second groove 1121, the third groove 1131 are connected to the outside of the casing 1 to form a tortuous air permeable passage I, thereby effectively preventing foreign matter from entering the inside of the motor through the air permeable passage I, further ensuring the normal operation of the motor.

[0058] Optionally, the housing 1 is in a bottomless bowl shape, and the through hole 11 is arranged at the bottom of the housing 1. Of course, the housing 1 can also be of other types of structures, as long as there is space for accommodating the bearing positioning and ventilation structure.

[0059] In order to enhance the structural strength of the through hole 11, in this embodiment, please refer to Figure 3 A plurality of ribs 10 are provided between the outer periphery of the through hole 11 and the inner peripheral wall of the housing 1 , and the plurality of ribs 10 are evenly arranged around the through hole 11 to enhance the structural strength of the through hole 11 .

[0060] Regarding the specific implementation of the tortuous ventilation channel I, in this embodiment, please refer to Figure 3 and Figure 5 The first groove 1111 and the second groove 1121 are staggered around the circumference of the housing 1 , and the first groove 1111 and the second groove 1121 are connected through the first intermediate channel 13 .

[0061] Specifically, one notch of the first groove 1111 is communicated with the interior of the housing 1, and the other notch is communicated with the inlet of the first intermediate channel 13. The outlet of the first intermediate channel 13 is communicated with one notch of the second groove 1121, and the other notch of the second groove 1121 is communicated with the third groove 1131. At this time, the second groove 1121 and the third groove 1131 have two arrangement modes, one is that the second groove 1121 and the third groove 1131 are not staggered around the circumference of the housing 1, that is, the second groove 1121 and the third groove 1131 are arranged along the same horizontal line in the radial direction of the housing 1, and the other is that the second groove 1121 and the third groove 1131 are also staggered around the circumference of the housing 1.

[0062] Based on the above-mentioned first groove 1111 and second groove 1121 being staggered around the circumference of the housing 1, one implementation method is, please refer to Figure 2 and Figure 3 , the second groove 1121 and the third groove 1131 are not staggered around the circumference of the housing 1. Specifically, one notch of the second groove 1121 is connected to the first groove 1111 through the first intermediate channel 13, another notch of the second groove 1121 is directly connected to one notch of the third groove 1131, and another notch of the third groove 1131 penetrates the third profile 113 in the axial direction or penetrates the third profile 113 in the radial direction. Thus, the tortuosity of the air permeable channel I is increased to prevent large foreign particles from entering the motor through the air permeable channel I.

[0063] Based on the above-mentioned staggered arrangement of the first groove 1111 and the second groove 1121 around the circumference of the housing 1, another implementation method is, please refer to Figure 4 and Figure 5 The second groove 1121 and the third groove 1131 are staggered around the circumference of the housing 1 , and a second intermediate channel 14 connecting the second groove 1121 and the third groove 1131 is provided on the step surface formed between the second contour 112 and the third contour 113 .

[0064] Specifically, the first groove 1111, the second groove 1121 and the third groove 1131 are staggered around the circumference of the housing 1, that is, the three are not arranged along the same horizontal line in the radial direction of the housing 1, wherein a notch of the second groove 1121 is connected to the first groove 1111 through the first intermediate channel 13, another notch of the second groove 1121 is connected to the second intermediate channel 14 arranged on the step surface formed between the second profile 112 and the third profile 113 and a notch of the third groove 1131, and another notch of the third groove 1131 penetrates the third profile 113 in the axial direction or penetrates the third profile 113 in the radial direction. Thus, the tortuosity of the air permeable channel I is further increased to prevent large foreign particles from entering the motor through the air permeable channel I.

[0065] If the first groove 1111 and the second groove 1121 are not staggered around the circumference of the housing 1, in order to ensure the tortuosity of the air permeable channel I, the second groove 1121 and the third groove 1131 need to be staggered around the circumference of the housing 1. Among them, one notch of the first groove 1111 is connected to the inside of the housing 1, the other notch of the first groove 1111 is directly connected to one notch of the second groove 1121, and the other notch of the second groove 1121 is connected to the third groove 1131 through the second intermediate channel 14, thereby, the tortuosity of the air permeable channel I can also be increased to prevent large foreign particles from entering the motor through the air permeable channel I.

[0066] For an implementation of the first intermediate channel 13, please refer to Figure 3 The first intermediate channel 13 is arranged on the step surface formed between the first contour 111 and the second contour 112 .

[0067] It can be understood that, since the diameter of the second profile 112 is smaller than the diameter of the first profile 111, a step surface can be formed between the first profile 111 and the second profile 112, and an annular first intermediate channel 13 is arranged around the circumference of the housing 1 on the step surface, or an arc-shaped first intermediate channel 13 located at the first groove 1111 and the second groove 1121 is arranged around the circumference of the housing 1. In this way, the first groove 1111 and the second groove 1121 arranged in a staggered manner can be connected through the first intermediate channel 13.

[0068] For another embodiment of the first intermediate channel 13, please refer to Figure 2 or Figure 4 One end face of the first bearing 6 adjacent to the bearing retaining ring 5 extends into the first bearing 6 and abuts against the bearing retaining ring 5, which can ensure that the bearing retaining ring 5 fully presses the first bearing 6 in the axial direction, and the outer periphery of the outer ring of the extending part of the first bearing 6 and the step surface formed between the first contour 111 and the second contour 112, the end face of the bearing retaining ring 5 adjacent to the first bearing 6, and the inner side of the first contour 111 form a first intermediate channel 13 to fully utilize the extending part of the first bearing 6, thereby ensuring that the bearing does not produce axial movement while realizing the connection between the first groove 1111 and the second groove 1121.

[0069] It should be noted that if the motor working environment is good, with only a small amount or even no external impurities, the ventilation channel I may not be set in a zigzag shape. Figure 6 and Figure 7, the first groove 1111, the second groove 1121, and the third groove 1131 are sequentially arranged along the same horizontal line in the radial direction of the housing 1 and are sequentially connected to form the air permeable channel I. That is, the first groove 1111, the second groove 1121, and the third groove 1131 are not staggered around the circumference of the housing 1. In this way, the air permeable channel I formed by the first groove 1111, the second groove 1121, and the third groove 1131 being sequentially connected can reduce the resistance of the gas flow inside and outside the housing, thereby improving the air permeability efficiency of the motor.

[0070] In order to allow the gas to pass smoothly through the tortuous air permeable channel I and save space, in this embodiment, please refer to Figure 3 or Figure 5 The first groove 1111 penetrates the first contour 111 along the axial direction of the housing 1 , and the second groove 1121 penetrates the second contour 112 along the axial direction of the housing 1 .

[0071] It is understandable that the gas is connected by a straight line segment, which can reduce the gas flow resistance. In this way, the first groove 1111 and the second groove 1121 are both extended along the axial direction of the housing 1 to form a straight line segment, which, on the one hand, reduces the resistance of the gas in each groove, thereby ensuring that the gas passes smoothly through the tortuous air permeable channel I formed by each groove; on the other hand, it saves the space occupied by the groove in the housing 1.

[0072] Further, the third groove 1131 penetrates the third profile 113 along the axial direction of the housing 1, or one end of the third groove 1131 is connected to the second groove 1121, and the other end extends along the radial direction of the housing 1 to penetrate the inner side of the third profile 113. The third groove 1131 is set as a straight line segment in the above two ways, which can reduce the resistance of the gas in the third groove 1131, ensure the smooth flow of gas, and save the space occupied by the groove in the housing 1.

[0073] In order to improve the ventilation efficiency and effect of the motor, on the basis of the above embodiment, bearing positioning ventilation structures are provided at both ends of the housing 1. Generally, bearings are provided at both ends of the motor shaft 4. In this way, bearing positioning ventilation structures are provided at both ends of the housing 1. The bearings in the two bearing positioning ventilation structures can be used to jointly and firmly support the rotation of the shaft 4. The ventilation channels I in the two bearing positioning ventilation structures can also be used to achieve common ventilation of the two ends of the motor, thereby improving the ventilation efficiency and effect of the motor, and further improving the reliability of the motor operation. Of course, the other end of the housing 1 can also be set as an open end, and the second bearing 7 is fixed to the open end through the end cover 8.

[0074] To facilitate the installation of the bearing retaining ring 5, based on any of the above embodiments, please refer to Figure 9-11The bearing retaining ring 5 is provided with a plurality of mounting holes 51 for inserting a jig for tightening and assembling, and the mounting holes 51 do not penetrate the bearing retaining ring 5 in the axial direction. The shape and size of the mounting holes 51 are not unique as long as they can meet the requirement of being able to insert the jig.

[0075] In another embodiment, please refer to Fig.11 The mounting hole 51 penetrates the bearing retaining ring 5 in the axial direction, and a fixture can be easily inserted for tightening operation.

[0076] In addition, in this embodiment, please refer to Figure 7 The maximum distance a from the mounting hole 51 to the center line of the rotating shaft 4 is smaller than the minimum distance b from the outer periphery of the outer ring of one end of the first bearing 6 adjacent to the bearing retaining ring 5 to the center line of the rotating shaft 4 .

[0077] Further explanation, generally, there is a fillet on the outer peripheral edge of the outer ring of the bearing, and b is the distance from the intersection of the outer peripheral surface of the outer ring of the bearing and the fillet to the center line of the rotating shaft 4. If b>a, it means that the deepest end of the mounting hole 51 in the radial direction that is set on the bearing retaining ring 5 is located on the end face of the bearing and does not produce a gap with the outer periphery of the outer ring of the bearing. Therefore, the bearing retaining ring 5 and the first bearing 6 can be tightly abutted without gaps, which can increase the pressure of the bearing retaining ring 5 on the first bearing 6. Compared with the pressure ring in a motor and electrical product disclosed in patent 202210614523.X (corresponding to the bearing retaining ring 5 of the present invention), when the outer dimensions of the bearing retaining ring 5 are consistent, the radial depth of the mounting hole 51 on the bearing retaining ring 5 is shallower, and the bearing strength is higher, thereby improving the reliability of the bearing retaining ring 5 in axial positioning of the bearing, thereby better preventing the bearing from axial movement.

[0078] Optionally, the mounting hole 51 is concavely arranged on the outer circumference, inner circumference or any end surface of the bearing retaining ring 5, which is not only convenient for processing and manufacturing, but also more convenient for inserting a fixture for tightening operation.

[0079] The present application also provides a motor, comprising any of the above-mentioned bearing positioning and ventilation structures, and also comprising a rotating shaft 4, a rotor 3 and a stator 2, wherein the rotating shaft 4 is passed through the first bearing 6 and is loosely fitted therewith, the rotor 3 is sleeved on the rotating shaft 4, and the stator 2 is arranged on the casing 1 around the outer circumference of the rotor 3 and is loosely fitted therewith.

[0080] Specifically, the rotating shaft 4 is passed through the first bearing 6, and the first bearing 6 supports the rotating shaft 4 in rotation inside the housing 1. The rotor 3 is located inside the housing 1 and is sleeved on the outer peripheral wall of the rotating shaft 4. The stator 2 is fixed on the inner peripheral wall of the housing 1 around the circumference of the rotating shaft 4 and is in clearance fit with the rotor 3. As a result, the stator 2 is energized to generate a magnetic field, and interacts with the magnetic field of the rotor 3 to generate an electromagnetic force to drive the rotor 3 to rotate, thereby driving the rotating shaft 4 to rotate. It should be noted that the rotor 3 includes a plurality of magnetic steels and a rotor core through which the magnetic steels are passed, and the stator 2 includes a stator core and a stator winding wound on the stator core. The specific arrangement between the rotor 3 and the components in the stator 2 can refer to the prior art, which is not the focus of protection of this application, so it will not be described in detail herein.

[0081] Regarding the specific implementation of the rotating shaft 4, in this embodiment, please refer to Fig.13 and Fig.14 The rotating shaft 4 is composed of an a profile 41, a b profile 42 and a c profile 43 which are all cylindrical and are sequentially connected along the direction from the outside to the inside of the housing 1. The inner periphery of the inner ring of the first bearing 6 is clearance-matched with the outer periphery of the a profile 41, and one end of the inner ring of the first bearing 6 adjacent to the bearing retaining ring 5 abuts against the first step structure 44 between the a profile 41 and the b profile 42.

[0082] It can be understood that the outer periphery of the a profile 41 and the inner side of the second profile 112 cooperate with each other to effectively limit the radial movement of the first bearing 6. The outer ring surface of one end of the first bearing 6 adjacent to the bearing retaining ring 5 abuts against the bearing retaining ring 5, and the inner ring surface of one end of the first bearing 6 adjacent to the bearing retaining ring 5 abuts against the first step structure 44 between the a profile 41 and the b profile 42, which can effectively limit the movement of the first bearing 6 toward the inside of the housing 1.

[0083] In this embodiment, please refer to Figure 2 The present application also includes a second bearing 7 and an end cover 8. The first bearing 6 is sleeved on one side of the rotating shaft 4, and the second bearing 7 is sleeved on the other side of the rotating shaft 4. The inner circumference of the inner ring of the second bearing 7 is clearance-matched with the outer circumference of the c profile 43 on the rotating shaft 4, and the outer circumference of the outer ring is fixed to the inner circumferential wall of the housing through the end cover 8 to limit the radial movement of the second bearing 7. The inner ring surface of one end of the first bearing 6 adjacent to the b profile 42 on the rotating shaft 4 abuts against the second step structure 45 between the c profile 43 and the b profile 42 to limit the movement of the second bearing 7 toward the inside of the housing.

[0084] Regarding the specific installation method of the end cover 8 in the housing 1, in this embodiment, please refer to Figure 3 , Fig.15 and Fig.16The top of the housing 1 is open, and a fourth profile 12 is provided on the top of the housing 1. The end cover 8 is composed of a d profile 81 and an e profile 82, both of which are cylindrical and sequentially connected along the direction from the inside of the housing 1 to the outside thereof. The outer periphery of the outer ring of the second bearing 7 is matched with the inner periphery of the d profile 81, so that the d profile 81 and the c profile 43 on the rotating shaft 4 cooperate with each other, which can effectively limit the radial movement of the second bearing 7. A third step structure 83 is provided on the inner periphery of the d profile 81, and the third step structure 83 abuts against the inner ring surface of the end of the second bearing 7 away from the second step structure 45. Therefore, the third step structure 83 and the second step structure 45 cooperate with each other to effectively limit the axial movement of the second bearing 7. In addition, the outer periphery of the e profile 82 of the end cover 8 is fixed to the inner side of the fourth profile 12, and the fixing method can be welding or other connection methods. The fourth profile 12 is provided with a fourth step structure 121 on the side facing the interior of the casing 1, and a fifth step structure abutting against the fourth step structure 121 is also provided between the outer peripheries of the e profile 82 and the d profile 81 of the end cover 8, thereby effectively limiting the movement of the end cover 8 toward the interior of the casing 1.

[0085] In order to ensure that the first bearing 6 and the second bearing 7 have sufficient preload in the axial direction, in this embodiment, please refer to Figure 2 An elastic member 9 is provided between the first bearing 6 and the first stepped structure 44 and / or an elastic member 9 is provided between the second bearing 7 and the second stepped structure 45 .

[0086] It is understandable that the elastic member 9 can be placed in the compact gap between the bearing and the stepped structure, and the elastic member 9 accurately matches the preload range required by the bearing through its elastic characteristics, so that the first bearing 6 and the second bearing 7 have sufficient preload in the axial direction, thereby effectively preventing the first bearing 6 and the second bearing 7 from axial movement. Among them, the elastic member 9 can be a wave spring, which can save axial space and output a greater spring stiffness under the same conditions, thereby providing a preload that meets the requirements in a smaller axial space.

[0087] Regarding the fixing method of the bearing retaining ring 5 and the housing 1, in the present embodiment, the outer periphery of the outer ring of the bearing retaining ring 5 is connected to the inner peripheral wall of the housing 1 by threaded cooperation, and a plurality of riveting points are formed between the outer peripheral edge of the outer ring of the bearing retaining ring 5 away from the first bearing 6 and the inner peripheral wall of the housing 1.

[0088] Specifically, the outer circumference of the outer ring of the bearing retaining ring 5 is provided with an internal thread, and the inner side of the first profile 111 is provided with an external thread, so that the bearing retaining ring 5 and the first profile 111 are fastened by the cooperation of the internal and external threads, and a plurality of riveting points are formed between the outer circumference of the outer ring of the end of the bearing retaining ring 5 away from the first bearing 6 and the inner side of the first profile 111. In this way, in addition to the cooperation of the threads, the bearing retaining ring 5 and the first profile 111 also have riveting points, so that the connection between the bearing retaining ring 5 and the first profile 111 is more stable and reliable, that is, the bearing retaining ring 5 is firmly installed in the housing 1. Of course, the outer circumference of the bearing retaining ring 5 and the first profile 111, that is, the inner circumferential wall of the housing 1, can also be fixedly connected by other means, such as clamping.

[0089] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above is a detailed introduction to the bearing positioning and ventilation structure and the motor provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A bearing positioning and ventilation structure, used to be arranged inside a housing (1), characterized in that: The bearing positioning and ventilation structure comprises: A through hole (11) formed by connecting a first contour (111), a second contour (112) and a third contour (113) whose diameters decrease in sequence from the inside of the housing (1) to the outside thereof; the first contour (111), the second contour (112) and the third contour (113) are respectively provided with a first groove (1111), a second groove (1121) and a third groove (1131) on their inner sides; the first groove (1111) is connected to the inside of the housing (1); the second groove (1121) is connected to the first groove (1111) and the third groove (1131); and the third groove (1131) is connected to the outside of the housing (1); A bearing retaining ring (5), the outer periphery of the bearing retaining ring (5) being fixedly matched with the inner side of the first contour (111); A first bearing (6), wherein the outer circumference of the outer ring of the first bearing (6) contacts and fits with the inner side of the second profile (112), and abuts between a step surface formed between the second profile (112) and the third profile (113) and the bearing retaining ring (5).

2. The bearing positioning and ventilation structure according to claim 1, characterized in that: Any two or all of the first groove (1111), the second groove (1121) and the third groove (1131) are arranged in a staggered manner around the circumference of the housing (1).

3. The bearing positioning and ventilation structure according to claim 2, characterized in that: The first groove (1111) and the second groove (1121) are staggeredly arranged around the circumference of the housing (1), and the first groove (1111) and the second groove (1121) are connected via a first intermediate channel (13).

4. The bearing positioning and ventilation structure according to claim 3, characterized in that: The first intermediate channel (13) is arranged on a step surface formed between the first contour (111) and the second contour (112).

5. The bearing positioning and ventilation structure according to claim 3, characterized in that: An end face of the first bearing (6) adjacent to the bearing retaining ring (5) extends into the first profile (111) and abuts against the bearing retaining ring (5); a step surface formed between the first profile (111) and the second profile (112), an outer circumference of the outer ring of the first bearing (6), an end face of the bearing retaining ring (5) adjacent to the first bearing (6), and an inner side of the first profile (111) form the first intermediate channel (13).

6. The bearing positioning and ventilation structure according to claim 1, characterized in that: The second groove (1121) and the third groove (1131) are staggered around the circumference of the housing (1), and a second intermediate channel (14) connecting the second groove (1121) and the third groove (1131) is provided on the step surface formed between the second contour (112) and the third contour (113).

7. The bearing positioning and ventilation structure according to claim 1, characterized in that: The first groove (1111) penetrates the first contour (111) along the axial direction of the housing (1), and the second groove (1121) penetrates the second contour (112) along the axial direction of the housing (1).

8. The bearing positioning and ventilation structure according to claim 7, characterized in that: The third groove (1131) penetrates the third contour (113) along the axial direction of the housing (1), or one end of the third groove (1131) is connected to the second groove (1121), and the other end extends along the radial direction of the housing (1) to penetrate the inner side of the third contour (113).

9. The bearing positioning and ventilation structure according to any one of claims 1 to 8, characterized in that: The bearing retaining ring (5) is provided with a plurality of mounting holes (51) for inserting a jig for tightening and assembling, and the mounting holes (51) may or may not penetrate the bearing retaining ring (5) in the axial direction.

10. A motor, characterized in that: The invention comprises a bearing positioning and ventilation structure as claimed in any one of claims 1 to 9, and further comprises a housing (1), a rotating shaft (4), a rotor (3) and a stator (2), wherein the rotating shaft (4) is passed through the first bearing (6) and is loosely matched therewith, the rotor (3) is sleeved on the rotating shaft (4), and the stator (2) is arranged on the housing (1) around the outer circumference of the rotor (3) and is loosely matched with the rotor (3).

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