Motor

Abstract

The utility model discloses a motor. The motor comprises a housing; the stator is arranged in the shell; the rotor is arranged on the inner side of the stator; the rotating shaft is arranged in the rotor in a penetrating manner; the pressure applying ring is located in the machine shell, the periphery of the pressure applying ring is fixedly connected with the inner circumferential wall of the machine shell, a plurality of notches are formed in the pressure applying ring, and the notches penetrate through the pressure applying ring in the axial direction; the first bearing is arranged on one side of the rotating shaft in a sleeving mode and limited between the pressure applying ring and the inner end wall of the machine shell, and the periphery of the outer ring of the first bearing is in contact fit with the inner circumferential wall of the machine shell; the minimum distance between the periphery of the outer ring of the end, close to the pressure applying ring, of the first bearing and the center line of the rotating shaft is larger than the maximum distance between the notch and the center line of the rotating shaft, a ventilation channel is formed in the machine shell, one end of the ventilation channel communicates with the interior of the machine shell, and the other end of the ventilation channel communicates with the exterior of the machine shell along the distribution path of the pressure applying ring and the first bearing. According to the motor, ventilation of the motor can be realized, and axial movement of the bearing can be better prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a motor. Background Art

[0002] During the operation of the motor, heat is generated in the stator winding. Since the interior of the motor is a closed space, it is necessary to connect the inside and outside of the motor to balance the pressure inside and outside the motor and avoid pressure difference between the inside and outside of the bearing.

[0003] Patent 202210614523.X discloses a motor and electrical appliance product, in which a notch penetrates the pressure ring in the axial direction, and a through hole is formed between the notch and the housing to allow the motor to ventilate and avoid a pressure difference between the inside and outside of the bearing. However, at least a portion of the notch in this patent is located radially outside the bearing, so that there is a gap between the pressure ring and the bearing, and the gap is connected to the gap and the gap left between the outer ring of the bearing and the inner wall of the housing to form a breathable through hole. This patent has the following disadvantages: First, the radial depth of the notch is larger, which weakens the strength of the pressure ring, and the pressure ring is prone to loosening, causing the bearing to move axially; second, the gap between the pressure ring and the bearing will reduce the pressure of the pressure ring on the bearing, making the bearing prone to axial movement.

[0004] In summary, how to achieve ventilation of the motor while better preventing the bearing from axial movement is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a motor that can achieve motor ventilation and better prevent axial movement of the bearing, thereby ensuring the normal operation of the motor.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A motor, comprising:

[0008] chassis;

[0009] a stator, disposed in the housing;

[0010] a rotor, disposed on the inner side of the stator;

[0011] a rotating shaft, passing through the rotor;

[0012] a pressure ring located in the housing, wherein the outer periphery of the pressure ring is fixedly connected to the inner peripheral wall of the housing, and the pressure ring is provided with a plurality of notches, wherein the notches penetrate the pressure ring in the axial direction;

[0013] a first bearing, sleeved on one side of the rotating shaft and confined between the pressure ring and the inner end wall of the housing, with the outer periphery of the outer ring of the first bearing in contact with the inner circumferential wall of the housing;

[0014] The minimum distance between the outer periphery of the outer ring of one end of the first bearing adjacent to the pressure ring and the center line of the rotating shaft is greater than the maximum distance between the notch and the center line of the rotating shaft, and an air passage is provided on the housing, one end of the air passage is connected to the interior of the housing, and the other end is connected to the outside of the housing along the distribution path of the pressure ring and the first bearing.

[0015] Preferably, the inner circumferential wall of the casing is concavely provided with a first groove at a position corresponding to the outer circumference of the pressure ring, the inner circumferential wall of the casing is provided with a radial protrusion for accommodating the first bearing, the radial protrusion is concavely provided with a second groove at a position corresponding to the outer circumference of the outer ring of the first bearing, and the inner end wall of the casing is penetrated by a third groove, and the first groove, the second groove and the third groove are connected in sequence along the axial direction of the casing to form the air permeable channel.

[0016] Preferably, the outer circumference of the outer ring of the pressure ring is connected to the inner circumferential wall of the housing through threaded fitting, and a plurality of riveting points are formed between the outer circumference of the outer ring of the end of the pressure ring away from the first bearing and the inner circumferential wall of the housing.

[0017] Preferably, the rotating shaft is composed of a first profile, a second profile and a third profile, all of which are cylindrical and connected in sequence along the direction from the outside to the inside of the housing. The inner periphery of the inner ring of the first bearing is clearance-fitted with the outer periphery of the first profile, and one end of the inner ring of the first bearing adjacent to the pressure ring is against the first step structure between the first profile and the second profile.

[0018] Preferably, it also includes a second bearing and an end cover, the inner periphery of the inner ring of the second bearing is clearance-fitted with the outer periphery of the third profile, the outer periphery of the outer ring is fixed to the inner circumferential wall of the casing through the end cover, and one end of the inner ring of the second bearing adjacent to the second profile is against the second step structure between the third profile and the second profile.

[0019] Preferably, the end cover is composed of a fourth profile and a fifth profile connected in sequence along the direction from the inside to the outside of the casing, the outer periphery of the outer ring of the second bearing is clearance-fitted with the inner periphery of the fourth profile, and the end of the inner ring of the second bearing away from the second step structure is lower than the third step structure on the inner periphery of the fourth profile, and the outer periphery of the fifth profile is fixedly connected to the inner circumferential wall of the casing.

[0020] Preferably, an elastic member is provided between the first bearing and the first stepped structure and / or an elastic member is provided between the second bearing and the second stepped structure.

[0021] Preferably, the notch is concavely arranged on the inner circumferential surface of the pressure ring.

[0022] In the motor provided by the present invention, although the notch passes through the pressure ring in the axial direction, the minimum distance b between the outer periphery of the outer ring of one end of the first bearing adjacent to the pressure ring and the centerline of the rotating shaft is greater than the maximum distance a between the notch and the centerline of the rotating shaft, that is, b>a. Compared with the existing patents described above, the pressure ring and the first bearing can be tightly abutted without any gap, thereby increasing the pressure of the pressure ring on the bearing. Moreover, when the outer dimensions of the pressure ring are consistent, the radial depth of the notch on the pressure ring is shallower, and the bearing strength is higher, thereby improving the reliability of the pressure ring's axial positioning of the bearing, thereby better preventing the bearing from axial movement. In addition, the air vent is arranged along the distribution path of the pressure ring and the first bearing, connecting the inside and outside of the housing, thereby achieving ventilation of the motor.

[0023] Therefore, the present application can achieve ventilation of the motor and better prevent axial movement of the bearing, thereby ensuring the normal operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the external structure of a motor provided in this application;

[0026] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0027] Figure 3 for Figure 1 A partial enlarged view of the ventilation channel;

[0028] Figure 4 for Figure 1 A schematic diagram of the outer structure of the housing from a perspective of one;

[0029] Figure 5 for Figure 4 Cross-sectional view at the middle BB;

[0030] Figure 6 for Figure 1 A schematic diagram of the outer structure of the housing from the perspective of FIG.

[0031] Figure 7 A cross-sectional view of the second motor provided in this application;

[0032] Figure 8 for Figure 7 A schematic diagram of the ventilation channel in the casing;

[0033] Figure 9 A cross-sectional view of a third motor provided in this application;

[0034] Figure 10 for Figure 9 A schematic diagram of the ventilation channel in the casing;

[0035] Figure 11 A schematic diagram of the appearance and structure of the first pressure ring provided in this application;

[0036] Figure 12 A schematic diagram of the external structure of the rotating shaft provided in this application;

[0037] Figure 13 for Figure 12 Cross-sectional view at CC;

[0038] Figure 14 A schematic diagram of the external structure of the end cap provided in this application;

[0039] Figure 15 for Figure 14 Cross-sectional view at DD in the middle.

[0040] Reference numerals:

[0041] 1-housing; 11-through hole; 111-a outline; 112-b outline; 113-c outline; 1111-first groove; 1121-second groove; 1131-third groove; I-ventilation channel; 12-d outline; 121-fourth step structure; 13-first intermediate channel; 14-second intermediate channel;

[0042] 2- stator;

[0043] 3- rotor;

[0044] 4-rotating axis; 41-first profile; 42-second profile; 43-third profile; 44-first step structure; 45-second step structure;

[0045] 5-pressure ring; 51-notch;

[0046] 6-first bearing;

[0047] 7- second bearing;

[0048] 8-end cover; 81-fourth profile; 82-fifth profile; 83-third step structure.

[0049] 9- elastic member;

[0050] 10- Ribs. DETAILED DESCRIPTION

[0051] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0052] The core of the utility model is to provide a motor, which can achieve motor ventilation and better prevent axial movement of the bearing, thereby ensuring the normal operation of the motor.

[0053] Please refer to Figure 1 and 2 In a specific embodiment, the motor provided in the present application includes a housing 1, a stator 2, a rotor 3, a rotating shaft 4, a pressure ring 5 and a first bearing 6.

[0054] The inner circumferential wall of the housing 1 near the end is fixedly connected to the outer circumference of the pressure ring 5. A first bearing 6 is disposed between the inner end wall of the housing 1 and one end face of the pressure ring 5 near the open end. This ensures that one end face of the first bearing 6 near the open end contacts and mates with the inner end wall of the housing 1, while the other end face of the first bearing 6 near the pressure ring 5 contacts and mates with one end face of the pressure ring 5 to axially limit the first bearing 6. The outer circumference of the outer ring of the first bearing 6 contacts and mates with the inner circumferential wall of the housing 1 to radially limit the first bearing 6.

[0055] 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 to the inner peripheral wall of the housing 1 around the circumference of the rotating shaft 4 and is loosely matched with the rotor 3. As a result, the stator 2 is energized to generate a magnetic field, and the interaction with the magnetic field of the rotor 3 generates 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 magnets and a rotor core through which the magnets 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 stator 2 components can be referred to the prior art. It is not the focus of protection of this application, so it will not be described in detail herein.

[0056] The pressure ring 5 is provided with a plurality of notches 51, each of which passes through the pressure ring 5 in the axial direction, so as to facilitate the insertion of a jig to tighten the pressure ring 5. Figure 11 And the maximum distance a between the notch 51 and the center line of the shaft 4 is less than the minimum distance b between the outer periphery of the outer ring of the first bearing 6 adjacent to the pressure ring 5 and the center line of the shaft 4, as shown in FIG. Figure 3 As shown in the figure, it is understood that the outer ring of a general bearing has a rounded corner on its outer periphery. b is the distance from the intersection of the outer periphery of the outer ring of the bearing and the rounded corner to the centerline of the rotating shaft 4. If b>a, it means that the deepest end of the notch 51 provided through the pressure ring 5 in the radial direction is located on the end face of the bearing and does not form a gap with the outer periphery of the bearing outer ring.

[0057] The housing 1 is provided with a ventilation channel I, one end of which is connected to the interior of the housing 1, and the other end is connected to the outside of the housing 1 along the distribution path of the pressure ring 5 and the first bearing 6. Figure 3 As shown, it is understandable that the air vent I runs through the open end of the housing 1 to achieve ventilation between the inside and outside of the housing 1, and the air vent I is arranged along the distribution path of the pressure ring 5 and the first bearing 6, which can quickly discharge the hot air accumulated on the bearing side inside the housing 1, so that the air pressure 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 differences between the inside and outside of the bearing.

[0058] In the motor of the above embodiment, although the notch 51 passes through the pressure ring 5 in the axial direction, the minimum distance b between the outer periphery of the outer ring of one end of the first bearing 6 adjacent to the pressure ring 5 and the center line of the rotating shaft 4 is greater than the maximum distance a between the notch 51 and the center line of the rotating shaft 4, that is, b>a. Compared with the existing patents described above, the pressure ring 5 and the first bearing 6 can be tightly abutted without gaps, thereby increasing the pressure of the pressure ring 5 on the bearing. Moreover, when the outer dimensions of the pressure ring 5 are consistent, the radial depth of the notch 51 on the pressure ring 5 is shallower, and the bearing strength is higher, thereby improving the reliability of the pressure ring 5 in axial positioning of the bearing, thereby better preventing the bearing from axial movement. In addition, the air vent I is arranged along the distribution path of the pressure ring 5 and the first bearing 6 to connect the inside and outside of the housing 1, thereby achieving motor ventilation.

[0059] Therefore, the present application can achieve ventilation of the motor and better prevent axial movement of the bearing, thereby ensuring the normal operation of the motor.

[0060] In an alternative embodiment of the housing 1, please refer to Figure 4-6 The casing 1 is in the shape of a bottomless bowl, and a through hole 11 is provided at the bottom of the casing 1. The through hole 11 is connected by an a profile 111, a b profile 112 and a c profile 113, all of which are cylindrical and have diameters that decrease successively from the inside of the casing 1 to the outside.

[0061] Among them, the outer periphery of the pressure ring 5 is fixedly matched with the inside of the a profile 111, and the outer periphery of the outer ring of the first bearing 6 is in contact with the inner side of the b profile 112. Even if the b profile 112 limits the radial movement of the first bearing 6, the first bearing 6 is abutted between the step surface formed between the b profile 112 and the c profile 113 and the pressure ring 5. Even if the step surface formed between the b profile 112 and the c profile 113 limits the first bearing 6 from moving away from one end face of the inner ring of the pressure ring 5 to limit the first bearing 6 from moving toward the outside of the housing 1, the end face of the pressure ring 5 adjacent to the first bearing 6 is abutted against the end face of the first bearing 6 adjacent to the pressure ring 5 to limit the first bearing 6 from moving toward the inside of the housing 1, so that the first bearing 6 and the pressure ring 5 are stably installed in the through hole 11 of the housing 1.

[0062] Optional, such as Figure 6 As shown, 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 . The plurality of ribs 10 are evenly arranged around the through hole 11 to enhance the structural strength of the through hole 11 .

[0063] Regarding the specific implementation of the ventilation channel I, in this embodiment, please refer to Figure 5 and 6 The inner circumferential wall of the casing 1 is concavely provided with a first groove 1111 at a position corresponding to the outer circumference of the pressure ring 5, the inner circumferential wall of the casing 1 is provided with a radial protrusion for accommodating the first bearing 6, and the radial protrusion is concavely provided with a second groove 1121 at a position corresponding to the outer circumference of the outer ring of the first bearing 6, and the inner end wall of the casing 1 is penetrated by a third groove 1131. The first groove 1111, the second groove 1121, and the third groove 1131 are arranged in sequence along the same horizontal line in the radial direction of the casing 1 and are connected in sequence to form an air vent I.

[0064] Specifically, a first groove 1111 is provided inwardly on the inner side of the a profile 111, a second groove 1121 is provided inwardly on the inner side of the b profile 112, and a third groove 1131 is provided inwardly on the inner side of the c profile 113. The first groove 1111, the second groove 1121 and the third groove 1131 are arranged in sequence along the same horizontal line in the radial direction of the casing 1, that is, the first groove 1111, the second groove 1121 and the third groove 1131 are not misaligned around the circumference of the casing 1. In this way, the air permeability channel I formed by the first groove 1111, the second groove 1121 and the third groove 1131 connected in sequence can reduce the resistance to gas circulation inside and outside the casing 1, thereby improving the ventilation efficiency of the motor. In addition, the first groove 1111, the second groove 1121 and the third groove 1131 are all set inwardly within their respective corresponding contours. On the one hand, they do not affect the contact and fit between the outer periphery of the pressure ring 5 and the inner side of the a contour 111, and do not affect the contact and fit between the outer periphery of the outer ring of the first bearing 6 and the inner side of the b contour 112, thereby better limiting the radial movement of the pressure ring 5 and the first bearing 6, which is conducive to the reliable and stable operation of the motor; on the other hand, compared with the air vent directly opened on the casing 1, the present application facilitates the cleaning of the air vent I when disassembling, replacing or repairing the first bearing 6 and the pressure ring 5, so as to avoid the accumulation of external impurities in the air vent I and affecting the ventilation function of the motor.

[0065] It should be noted that if Figure 3 As shown, the first groove 1111 penetrates the a profile 111, the second groove 1121 penetrates the b profile 112, and the third groove 1131 penetrates the c profile 113, so that the ventilation channel I formed by the three can connect the inside and the outside of the casing 1.

[0066] In order to further optimize the air permeable channel I to prevent external impurities from entering the interior of the motor through the air permeable channel I, in other embodiments of the air permeable channel I, 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 casing 1.

[0067] If the first groove 1111 and the second groove 1121 are staggered around the circumference of the housing 1, the first groove 1111 and the second groove 1121 are connected through the first intermediate channel 13. Figure 8 shown.

[0068] Specifically, one notch of the first groove 1111 communicates with the interior of the housing 1, and the other notch communicates with the inlet of the first intermediate channel 13 provided on the stepped surface formed between the a-profile 111 and the b-profile 112. The outlet of the first intermediate channel 13 communicates with one notch of the second groove 1121, and the other notch of the second groove 1121 communicates with the third groove 1131. There are two possible arrangements for the second groove 1121 and the third groove 1131: one in which 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; the other in which the second groove 1121 and the third groove 1131 are also staggered around the circumference of the housing 1.

[0069] Among them, please refer to Figure 7 There are other ways to set the first intermediate channel 13. Specifically, one end face of the first bearing 6 adjacent to the pressure ring 5 extends into the a profile 111 and abuts against the pressure ring 5, which can ensure that the pressure 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 a profile 111 and the b profile 112, the end face of the pressure ring 5 adjacent to the first bearing 6, and the inner side of the a profile 111 form the first intermediate channel 13, so as to make full use of the extending part of the first bearing 6, thereby ensuring that the first groove 1111 is connected with the second groove 1121 while ensuring that the bearing does not produce axial movement.

[0070] Based on the above-mentioned staggered arrangement of the first groove 1111 and the second groove 1121 around the circumference of the housing 1, an implementation method is provided. Figure 7 and Figure 8 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 communicates with the first groove 1111 via the first intermediate channel 13, while the other notch of the second groove 1121 directly communicates with a notch of the third groove 1131. The other notch of the third groove 1131 axially penetrates the C-profile 113 or radially penetrates the C-profile 113. This increases the tortuosity of the air passage 1, preventing large foreign particles from entering the motor through the air passage 1.

[0071] 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 embodiment, please refer to Figure 9 and Figure 10 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 b profile 112 and the c profile 113.

[0072] 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 grooves are not arranged along the same horizontal line in the radial direction of the housing 1. One notch of the second groove 1121 communicates with the first groove 1111 through the first intermediate channel 13. Another notch of the second groove 1121 communicates with the second intermediate channel 14 provided on the stepped surface formed between the b-profile 112 and the c-profile 113, and with one notch of the third groove 1131. The other notch of the third groove 1131 axially or radially penetrates the c-profile 113. This further increases the tortuosity of the air passage I, preventing large foreign matter from entering the motor interior through the air passage I.

[0073] 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 .

[0074] Regarding the fixing method of the pressure ring 5 and the casing 1, in this embodiment, the outer periphery of the outer ring of the pressure ring 5 is connected to the inner peripheral wall of the casing 1 through threaded fitting, and multiple riveting points are formed between the outer peripheral edge of the outer ring of the pressure ring 5 away from the first bearing 6 and the inner peripheral wall of the casing 1.

[0075] Specifically, the outer circumference of the outer ring of the pressure ring 5 is provided with internal threads, and the inner side of the a-profile 111 is provided with external threads. This allows the pressure ring 5 and the a-profile 111 to be fastened together through the internal and external threads. Multiple rivet points are formed between the outer circumference of the outer ring of the pressure ring 5 at the end away from the first bearing 6 and the inner side of the a-profile 111. In this way, in addition to the threaded fit, the rivet points also form between the pressure ring 5 and the a-profile 111, making the connection between the pressure ring 5 and the a-profile 111 more stable and reliable, thus ensuring that the pressure ring 5 is securely installed in the housing 1. Of course, the outer circumference of the pressure ring 5 and the a-profile 111, i.e., the inner circumferential wall of the housing 1, can also be fixedly connected through other means, such as snap-fitting.

[0076] Regarding the specific structure of the notch 51, please refer to Figure 6 、 Figure 8 、 Figure 10 and Figure 11 The notch 51 is concavely arranged on the inner circumference of the pressure ring 5, which is not only convenient for processing and manufacturing, but also more convenient for inserting a jig for tightening. The notch 51 is rectangular or arc-shaped, and the shape and size are not limited. The notch 51 only needs to pass through the pressure ring 5 in the axial direction.

[0077] In addition, in another optional embodiment, the notch 51 does not penetrate the pressure ring 5 in the axial direction. The notch 51 is arranged on the outer periphery of the pressure ring 5 or on the end face away from the first bearing 6. Its shape and size do not necessarily meet the requirement of being able to insert the jig.

[0078] Regarding the specific implementation of the rotating shaft 4, in this embodiment, please refer to Figure 12 and Figure 13 The rotating shaft 4 is composed of a first profile 41, a second profile 42 and a third profile 43, all of which are cylindrical and connected in sequence from the outside to the inside of the housing 1. The inner periphery of the inner ring of the first bearing 6 is clearance-fitted with the outer periphery of the first profile 41, and one end of the inner ring of the first bearing 6 adjacent to the pressure ring 5 abuts against the first step structure 44 between the first profile 41 and the second profile 42.

[0079] It is understood that the outer periphery of the first profile 41 and the inner side of the b-profile 112 cooperate to effectively restrict radial movement of the first bearing 6. The outer ring surface of the end of the first bearing 6 adjacent to the pressure ring 5 abuts against the pressure ring 5, and the inner ring surface of the end of the first bearing 6 adjacent to the pressure ring 5 abuts against the first step structure 44 between the first profile 41 and the second profile 42, effectively restricting the first bearing 6 from moving toward the interior of the housing 1.

[0080] In this embodiment, please refer to Figure 14 and Figure 15 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 third 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 1 via 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 second profile 42 on the rotating shaft 4 abuts against the second step structure 45 between the third profile 43 and the second profile 42, thereby limiting the movement of the second bearing 7 toward the interior of the housing 1.

[0081] Regarding the specific installation method of the end cover 8 in the housing 1, in this embodiment, the top of the housing 1 is open and is provided with a d-profile 12. The end cover 8 is composed of a fourth profile 81 and a fifth profile 82, both cylindrical and connected in sequence from the interior to the exterior of the housing 1. The outer periphery of the outer ring of the second bearing 7 is clearance-matched with the inner periphery of the fourth profile 81, so that the fourth profile 81 cooperates with the third profile 43 on the rotating shaft 4, effectively limiting radial movement of the second bearing 7. Furthermore, a third stepped structure 83 is provided on the inner periphery of the fourth profile 81, which abuts against the inner ring surface of the second bearing 7 at the end away from the second stepped structure 45. As a result, the third stepped structure 83 and the second stepped structure 45 cooperate to effectively limit axial movement of the second bearing 7. In addition, the outer periphery of the fifth profile 82 of the end cover 8 is fixed to the inner side of the d profile 12, and the fixing method can be welding or other connection methods. The side of the d profile 12 facing the interior of the casing 1 is provided with a fourth step structure 121, and the outer periphery of the fifth profile 82 of the end cover 8 and the outer periphery of the fourth profile 81 also have a fifth step structure that abuts against the fourth step structure 121, thereby effectively limiting the movement of the end cover 8 toward the interior of the casing 1.

[0082] 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 .

[0083] It is understood that the elastic member 9 can be placed in the compact gap between the bearing and the stepped structure. The elastic member 9 precisely matches the required preload range of the bearing through its elastic properties, ensuring sufficient axial preload on the first and second bearings 6 and 7, thereby effectively preventing axial movement of the first and second bearings 6 and 7. The elastic member 9 can be a wave spring, which saves axial space and, under the same conditions, provides a higher spring stiffness, thereby providing the required preload within a smaller axial space.

[0084] 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.

[0085] 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.

[0086] The above describes the motor provided by the present invention in detail. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A motor, characterized in that: include: Housing (1); A stator (2) is disposed in the housing (1); A rotor (3) is provided on the inner side of the stator (2); A rotating shaft (4) is inserted into the rotor (3); A pressure ring (5) is located in the housing (1), the outer periphery of the pressure ring (5) is fixedly connected to the inner peripheral wall of the housing (1), and a plurality of notches (51) are provided on the pressure ring (5), and the notches (51) penetrate the pressure ring (5) in the axial direction; A first bearing (6) is sleeved on one side of the rotating shaft (4) and is limited between the pressure ring (5) and the inner end wall of the housing (1), and the outer periphery of the outer ring of the first bearing (6) is in contact with the inner peripheral wall of the housing (1); The minimum distance between the outer circumference of the outer ring of one end of the first bearing (6) adjacent to the pressure ring (5) and the center line of the rotating shaft (4) is greater than the maximum distance between the notch (51) and the center line of the rotating shaft (4), and the housing (1) is provided with an air vent (I), one end of the air vent (I) is connected to the interior of the housing (1), and the other end is connected to the outside of the housing (1) along the distribution path of the pressure ring (5) and the first bearing (6).

2. The motor according to claim 1, characterized in that The inner circumferential wall of the housing (1) is provided with a first groove (1111) at a position corresponding to the outer circumference of the pressure ring (5), the inner circumferential wall of the housing (1) is provided with a radial protrusion for accommodating the first bearing (6), and the radial protrusion is provided with a second groove (1121) at a position corresponding to the outer circumference of the outer ring of the first bearing (6), and the inner end wall of the housing (1) is provided with a third groove (1131) running through it, and the first groove (1111), the second groove (1121) and the third groove (1131) are connected in sequence along the axial direction of the housing (1) to form the air vent (I).

3. The motor according to claim 1, characterized in that The outer circumference of the outer ring of the pressure ring (5) is connected to the inner circumferential wall of the housing (1) through threaded engagement, and a plurality of riveting points are formed between the outer circumference of the outer ring of the end of the pressure ring (5) away from the first bearing (6) and the inner circumferential wall of the housing (1).

4. The motor according to claim 1, characterized in that The rotating shaft (4) is composed of a first profile (41), a second profile (42) and a third profile (43) which are connected in sequence along a 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 first profile (41); and one end of the inner ring of the first bearing (6) adjacent to the pressure ring (5) abuts against a first step structure (44) between the first profile (41) and the second profile (42).

5. The motor according to claim 4, characterized in that The machine body further comprises a second bearing (7) and an end cover (8), wherein the inner circumference of the inner ring of the second bearing (7) is loosely matched with the outer circumference of the third profile (43), the outer circumference of the outer ring is fixed to the inner circumferential wall of the housing (1) through the end cover (8), and one end of the inner ring of the second bearing (7) adjacent to the second profile (42) abuts against the second step structure (45) between the third profile (43) and the second profile (42).

6. The motor according to claim 5, characterized in that The end cover (8) is composed of a fourth profile (81) and a fifth profile (82) both of which are cylindrical and are sequentially connected in a direction from the inside to the outside of the housing (1); the outer periphery of the outer ring of the second bearing (7) is clearance-matched with the inner periphery of the fourth profile (81); and one end of the inner ring of the second bearing (7) away from the second stepped structure (45) is lower than the third stepped structure (83) of the inner periphery of the fourth profile (81); and the outer periphery of the fifth profile (82) is fixedly connected to the inner peripheral wall of the housing (1).

7. The motor according to claim 5, characterized in that 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).

8. The motor according to any one of claims 1 to 7, characterized in that The notch (51) is concavely arranged on the inner circumferential surface of the pressure ring (5).

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