Bearing chamber structure, motor, motor assembling method and automobile

Abstract

The invention provides a bearing chamber structure, a motor, a motor assembling method and an automobile, the bearing chamber structure comprises a first bearing chamber and a bearing pulling plate, the bearing pulling plate is used for applying force to a first bearing installed in the first bearing chamber so as to enable the first bearing to abut against the bottom surface of the first bearing chamber; an opening is formed in one end of the first bearing chamber, the bearing pulling plate covers the opening, and a first via hole is formed in the bearing pulling plate; when the bearing chamber structure is applied to the motor, the bearing pulling plate can be arranged on a rotating shaft of the motor in a sleeving mode through the first via hole and is in sealing fit with the rotating shaft so as to separate the first bearing chamber from a motor cavity of the motor. The bearing pulling plate can effectively prevent air in the motor cavity from moving into the first bearing chamber, the phenomenon that condensation is formed in the first bearing chamber due to cold and hot crossing is avoided, and therefore the condensation phenomenon in the first bearing chamber can be reduced, and accumulated water in the first bearing chamber is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a bearing chamber structure, a motor, a motor assembly method and a car. Background Art

[0002] In recent years, with the deepening of my country's energy crisis, the enhancement of people's environmental awareness, and the stimulation of government policy subsidies, the new energy vehicle industry has developed rapidly, and pure electric vehicle technology has gradually matured. As an important member of the three-electric system of new energy vehicles and the power source of new energy vehicles, the reliability of the drive motor directly affects driving safety.

[0003] Among them, the working environment faced by the drive motor is very complex, such as high temperature when the motor is running, or extreme cold in winter in the north. When the drive motor is in operation, the motor winding will generate a lot of heat, which will increase the air temperature inside the motor cavity. The bearing chamber is far away from the heat source, so the temperature inside the bearing chamber is lower than that of the motor chamber, which provides the conditions for the generation of condensed water. Condensed water easily accumulates in the small gap of the bearing chamber. Because the bearing in the bearing chamber is a rotating part, there must be a small gap inside it, so the inside or surface of the bearing is easily corroded by water. After a long period of accumulation, it is easy to cause the bearing to rust and affect the performance of the motor. Summary of the invention

[0004] Therefore, the present invention provides a bearing chamber structure, a motor, a motor assembly method and a car, which can solve the technical problem in the prior art that condensation and water accumulation easily occur in the bearing chamber.

[0005] In order to solve the above problems, the present invention provides a bearing chamber structure, which includes a first bearing chamber and a bearing pull plate, wherein the bearing pull plate is used to apply a force to a first bearing installed in the first bearing chamber so as to press the first bearing against the bottom surface of the first bearing chamber;

[0006] Among them, one end of the first bearing chamber has an opening, the bearing pull plate covers the opening, and the bearing pull plate is provided with a first through hole; when the bearing chamber structure is applied to a motor, the bearing pull plate can be sleeved on the rotating shaft of the motor through the first through hole, and cooperate with the rotating shaft seal to separate the first bearing chamber and the motor cavity of the motor.

[0007] In some embodiments, the bearing pull plate and the first bearing chamber remain relatively fixed; wherein the circumferential side wall of the first through hole and the rotating shaft can be plugged together, and the two are rotated and sealed at the plug-in point to seal between the rotating shaft and the bearing pull plate.

[0008] In some embodiments, the first through hole has a first section along the axial direction of the rotating shaft, the rotating shaft is provided with an annular groove, and the circumferential side wall of the first through hole is inserted into the annular groove through the first section to achieve plug-in cooperation with the rotating shaft; wherein,

[0009] The rotating shaft has a pull plate fitting section in the axial direction, the outer diameter of the pull plate fitting section is d, the annular groove is arranged on the pull plate fitting section, the depth of the annular groove is h=d / a, and the first section is in rotational sealing cooperation with the bottom surface and the side surface of the annular groove, wherein a=24-26;

[0010] And / or, the first through hole also has a second section along the axial direction of the rotating shaft, the second section is a flared section relative to the first section, a step is formed between the first section and the second section, and the second section is rotationally sealed with the outer wall of the pull plate mating section.

[0011] In some embodiments, the bearing pull plate is a two-half structure, and is respectively a first half bearing pull plate and a second half bearing pull plate; the first via hole is divided into two halves, half of the first via hole is located on the first half bearing pull plate, and the other half is located on the second half bearing pull plate.

[0012] In some embodiments, the bearing pull plate covers the opening by abutting against an end surface of the opening.

[0013] In some embodiments, the bearing chamber structure also includes a first end cover, and the first bearing chamber is arranged on the first end cover; the bearing pull plate is fixed to the first end cover by a fastener; wherein the bearing pull plate is provided with a first hole for cooperating with the fastener, and the first end cover is provided with a second hole for cooperating with the fastener.

[0014] The present invention also provides a motor, comprising the bearing chamber structure described in any one of the above.

[0015] In some embodiments, the motor is a horizontal motor, comprising a housing, a second bearing chamber and a motor assembly; the motor assembly comprises a rotor sleeved on the rotating shaft; the motor assembly is installed in the housing, and a first chamber and a second chamber are formed inside the housing on both sides of the axial direction of the motor assembly; the first bearing chamber is arranged in the first chamber, and the first bearing chamber is provided with a first drainage channel communicating with the first chamber; the second bearing chamber is arranged in the second chamber, and the second bearing chamber is provided with a second drainage channel communicating with the second chamber;

[0016] In which, a liquid equalizing channel connecting the first chamber and the second chamber is provided inside the casing below the rotor; when one of the first chamber and the second chamber is a high water level chamber with a water level higher than the liquid equalizing channel, and the other is a low water level chamber with a water level lower than the liquid equalizing channel, the water in the high water level chamber can flow into the low water level chamber through the liquid equalizing channel.

[0017] In some embodiments, the motor assembly also has a stator for driving the rotor to rotate, the stator has a stator core, the liquid equalizing channel includes a water groove arranged at the bottom of the stator core, the water groove passes through the axial ends of the stator core, and the liquid equalizing channel connects the first chamber and the second chamber through the water groove.

[0018] In some embodiments, a first drain hole that can be opened and closed is provided at the bottom of the first chamber; and / or a second drain hole that can be opened and closed is provided at the bottom of the second chamber.

[0019] In some embodiments, the motor further comprises a second end cover, an oil seal, an oil seal baffle and a dust cover, the second end cover is provided with a second through hole, the rotating shaft passes through the second through hole, and the oil seal is arranged at the second through hole;

[0020] The oil seal baffle is sleeved on the outer side of the rotating shaft and covers the oil seal; a first annular protrusion extending along the axial direction of the rotating shaft is provided on the side of the oil seal baffle away from the oil seal; the dust cover is sleeved on the outer side of the rotating shaft and covers the side of the oil seal baffle away from the oil seal; the dust cover has a second annular protrusion extending toward the side where the oil seal is located, and the second annular protrusion is sleeved on the outer periphery of the first annular protrusion;

[0021] Wherein, an annular convex hump extending in the circumferential direction is provided on the inner peripheral wall of the first annular protrusion.

[0022] In some embodiments, an end of the first annular protrusion facing away from the oil seal has an outer flange, and the outer flange is located on the inner side of the second annular protrusion.

[0023] The present invention further provides an assembly method for the motor described in any one of the above items, when the bearing chamber structure further includes a first end cover, the first bearing chamber is arranged on the first end cover; the bearing pull plate is fixed to the first end cover by a fastener; and the bearing pull plate is provided with a first hole for cooperating with the fastener, and the first end cover is provided with a second hole for cooperating with the fastener,

[0024] The assembly method includes: first assembling the bearing pull plate onto the rotating shaft, then passing the guide tool through the first hole and the second hole in sequence, and then moving the bearing pull plate to the opening under the guidance of the guide tool; then pulling out the guide tool; and then assembling the fastener into the first hole and the second hole.

[0025] The present invention also provides a car, comprising any one of the motors described above.

[0026] A bearing chamber structure, a motor, a motor assembly method and a vehicle provided by the present invention have the following beneficial effects:

[0027] 1. The bearing pull plate of the present invention can effectively prevent the air inside the motor cavity from moving to the inside of the first bearing chamber, avoiding the formation of condensation inside the first bearing chamber due to the crossover of cold and hot. This can reduce the condensation phenomenon in the first bearing chamber, reduce the water accumulation in the first bearing chamber, and increase the service life of the first bearing.

[0028] 2. By providing a liquid equalizing channel connecting the first chamber and the second chamber, a communicating vessel effect can be formed, thereby reducing the risk of water in the first chamber and the second chamber submerging the rotor.

[0029] 3. The combination of the oil seal baffle and the dust cover can reduce the risk of water immersion at the oil seal, thereby extending the service life of the oil seal and avoiding damage and leakage of the oil seal, thereby improving the reliability of the motor.

[0030] 4. From the perspective of the entire system, the present invention has made a unified design for the problems of motor condensation, water leakage, etc. from the outside to the inside, which can greatly improve the sealing reliability of the entire machine and reduce the possibility of corrosion of motor parts due to protection failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0032] Figure 1 is a structural schematic diagram of a motor provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of assembling a bearing pull plate and a rotating shaft provided by one embodiment of the present invention;

[0034] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0035] Figure 4 It is a schematic diagram of the two halves of the bearing pull plate when separated;

[0036] Figure 5 is a structural schematic diagram of a stator core provided by an embodiment of the present invention;

[0037] Figure 6 It is a schematic diagram reflecting the assembly of the oil seal, oil seal baffle and dust cover;

[0038] Figure 7 It is a schematic diagram of assembling the bearing pull plate to the opening of the first bearing chamber.

[0039] The accompanying drawings are marked as follows:

[0040] 1. First end cover; 2. First bearing; 3. Bearing pull plate; 4. Rotating shaft; 5. Rotor pressure plate; 6. Rotor; 7. Stator; 8. Stator winding; 9. First drain hole; 10. First bolt; 11. Second end cover; 12. Oil seal; 13. Oil seal baffle; 14. Dust cover; 15. Flange; 161. First drain channel; 162. Second drain channel; 17. Casing; 18. Second bearing; 19. First bearing chamber; 20. Second bearing chamber; 21. Second drain hole; 22. Second bolt; 23. First chamber ; 24, second chamber; 25, liquid equalizing channel; 26, rotary transformer chamber; 27, rotor assembly; 28, guide fixture; 30, first hole; 31, through hole; 32, step; 41, annular groove; 42, pull plate fitting section; 71, stator core; 100, motor cavity; 101, second hole; 130, discharge hole; 131, first annular protrusion; 132, outer flange; 133, annular convex hull; 141, second annular protrusion; 191, opening; 311, first section; 312, second section; 701, water trough. DETAILED DESCRIPTION

[0041] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] See also Figure 1-4 As shown, according to an embodiment of the present invention, a bearing chamber structure is provided, which includes a first bearing chamber 19 and a bearing pull plate 3. The bearing pull plate 3 is used to apply force to the first bearing 2 installed in the first bearing chamber 19 to press the first bearing 2 against the bottom surface 192 of the first bearing chamber. Among them, one end of the first bearing chamber 19 has an opening 191, the bearing pull plate 3 covers the opening 191, and a first through hole 31 is provided on the bearing pull plate. When the bearing chamber structure of the present invention is applied to a motor, the bearing pull plate 3 can be sleeved on the rotating shaft 4 of the motor through the first through hole 31, and is sealed with the rotating shaft 4 to separate the first bearing chamber 19 and the motor cavity 100 of the motor.

[0046] In the above example, the bearing pull plate 3 has a dual function. On the one hand, the bearing pull plate 3 can cooperate with the bottom surface 192 of the first bearing chamber to axially position the first bearing 2 to prevent the first bearing 2 from axially moving; on the other hand, the bearing pull plate 3 also covers the opening 191 of the first bearing chamber to separate the first bearing chamber 19 and the motor chamber 100, thereby effectively preventing the air inside the motor chamber 100 from moving into the first bearing chamber 19, avoiding the formation of condensation inside the first bearing chamber 19 due to the cross-over of cold and hot, thereby reducing the condensation phenomenon in the first bearing chamber 19, reducing the water accumulation in the first bearing chamber 19, and increasing the service life of the first bearing 2.

[0047] It should be noted here that: Figure 1 As shown, when the motor includes a resolver chamber 26, the resolver chamber 26 is used to install a resolver, and the resolver is used to detect the position of the rotating shaft 4. The resolver chamber 26 is located on the side of the first bearing chamber 19 away from the motor cavity 100, and the resolver chamber 26 is connected to the first bearing chamber 19. The bearing pull plate 3 covers the opening 191 of the first bearing chamber, which can reduce the condensation effect in the first bearing chamber 19 and the resolver chamber 26.

[0048] A drainage structure may also be provided on the above-mentioned resolver chamber 26 . For example, a drainage hole may be provided at the bottom of the resolver chamber 26 to assist the resolver chamber 26 in draining water and avoid water accumulation in the resolver chamber 26 .

[0049] In some embodiments, Figure 1 As shown, the aforementioned bearing chamber structure may include a first end cover 1, and the aforementioned first bearing chamber 19 is arranged on the first end cover 1. The aforementioned bearing pull plate 3 may be fixed to the first end cover 1 by a fastener. The bearing pull plate 3 is provided with a first hole 30 for cooperating with the fastener, and the first end cover 1 is provided with a second hole 101 for cooperating with the fastener.

[0050] In some embodiments, when the fastener is a screw, one of the first hole 30 and the second hole 101 is a screw through hole, and the other is a threaded hole, and the screw is used to pass through the screw through hole and be threaded in the threaded hole.

[0051] In order to seal the rotating shaft 4 and the bearing plate 3, in some embodiments, as Figure 2As shown, the bearing plate 3 and the first bearing chamber 19 are relatively fixed, for example, the bearing plate 3 can be fixed to the first bearing chamber 19 by screws or the like. The circumferential side wall of the first through hole 31 and the rotating shaft 4 can be plugged in and matched, and the two rotate and seal at the plug-in position to seal the rotating shaft 4 and the bearing plate 3. The plug-in fit between the circumferential side wall of the first through hole 31 and the rotating shaft 4 can be specifically as follows: 1. An annular groove 41 (such as Figure 3 As shown), part or all of the shaft segment of the circumferential side wall of the first through hole 31 is inserted into the annular groove 41; 2. Another annular groove is designed on the circumferential side wall of the first through hole 31, and an annular protrusion is designed on the rotating shaft 4, which is inserted into the other annular groove.

[0052] In the above example, the structure in which the circumferential side wall of the first through hole 31 is plugged into the rotating shaft 4 can form a labyrinth structure, which can hinder the flow of air, thereby achieving sealing between the rotating shaft 4 and the bearing pull plate 3.

[0053] In some embodiments, Figure 3 As shown, the aforementioned first through hole 31 has a first section 311 along the axial direction of the rotating shaft 4, and the aforementioned rotating shaft 4 is provided with an annular groove 41. The circumferential side wall of the first through hole 31 is inserted into the annular groove 41 through the first section 311 to achieve plug-in matching with the rotating shaft 4. Among them, the rotating shaft 4 has a pull plate matching section 42 in the axial direction, and the outer diameter of the pull plate matching section 42 is d. The aforementioned annular groove 41 is arranged on the pull plate matching section 42, and the depth of the annular groove 41 is h=d / a, and the first section 311 is rotationally sealed with the bottom and side surfaces of the annular groove 41. Among them, a=24~26.

[0054] In the above example, by limiting the depth of the annular groove 41 to h=d / a and making the first section 311 rotate and seal with the bottom and side surfaces of the annular groove 41, the leakage of gas at the joint between the first section 311 and the annular groove 41 can be reduced, and the stability of the operation of the rotating shaft 4 can be ensured.

[0055] In some embodiments, the first through hole 31 further has a second section 312 along the axial direction of the rotating shaft 4. The second section 312 is a flared section relative to the first section 311, a step (32) is formed between the first section (311) and the second section (312), and the second section (312) is rotatably sealed with the outer wall of the pull plate matching section 42.

[0056] In the above example, since the first section 311 and the second section 312 are both designed in a stepped shape, a high-pressure circulation can be generated near the rotating shaft 4 with a high rotation speed, blocking the flow of hot air from the motor cavity 100 to the first bearing chamber 19 .

[0057] It should be noted here that the assembly clearance between the first section 311 and the annular groove 41 is larger than 0.2 mm on one side, which is completely larger than the machining accuracy level of the parts. There is no need to worry about machining deviations causing friction between the bearing pull plate 3 and the rotating shaft 4.

[0058] In some embodiments, the aforementioned bearing plate 3 is a two-half structure, and is respectively a first half bearing plate 301 and a second half bearing plate 302. The first half bearing plate 301 and the second half bearing plate 302 are detachably connected. The aforementioned first through hole 31 is also divided into two halves, one half of the first through hole 31 is located on the first half bearing plate 301, and the other half of the first through hole 31 is located on the second half bearing plate 302.

[0059] In the above example, by dividing the bearing pull plate 3 into two halves from the first through hole 31 , it is beneficial to achieve the effect of plug-fitting between the circumferential side wall of the first through hole 31 and the rotating shaft 4 .

[0060] In some embodiments, the aforementioned bearing pull plate 3 can cover the opening 191 by abutting against the end surface of the opening 191. Among them, sealing by surface-to-surface matching can simplify the sealing structure.

[0061] The present invention also provides a motor, which may include any one of the above-mentioned bearing chamber structures. Among them, because the motor adopts the above-mentioned bearing chamber structure, the bearing pull plate 3 has a dual role. On the one hand, the bearing pull plate 3 can cooperate with the bottom surface 192 of the first bearing chamber to axially position the first bearing 2 to prevent the first bearing 2 from axially moving; on the other hand, the bearing pull plate 3 also covers the opening 191 of the first bearing chamber to separate the first bearing chamber 19 and the motor chamber 100, thereby effectively preventing the air inside the motor chamber 100 from moving into the first bearing chamber 19, avoiding the formation of condensation inside the first bearing chamber 19 due to the crossover of cold and heat, thereby reducing the condensation phenomenon in the first bearing chamber 19, reducing the water accumulation in the first bearing chamber 19, and increasing the service life of the first bearing 2.

[0062] In some embodiments, Figure 1 As shown, the motor of the present invention is a horizontal motor. The motor also includes a housing 17, a second bearing chamber 20 and a motor assembly. The motor assembly includes a rotor 6 and a stator 7 for driving the rotor 6 to rotate. The rotor 6 is sleeved on the rotating shaft 4. The motor assembly is installed in the housing 17, and a first chamber 23 is formed inside the housing 17 on one side of the axial direction of the motor assembly, and a second chamber 24 is formed inside the housing 17 on the other side of the axial direction of the motor assembly. The aforementioned first bearing chamber 19 is arranged in the first chamber 23, and the second bearing chamber 20 is arranged in the second chamber 24. The second bearing chamber 20 is used to install the second bearing 18 that provides support for the rotating shaft 4.

[0063] The first bearing chamber 19 is provided with a first drainage channel 161 in communication with the first chamber 23. The first drainage channel 161 can be arranged at the bottom of the first bearing chamber 19 to facilitate the drainage of the accumulated water in the first bearing chamber 19 and prevent the first bearing 2 and the rotary transformer from failing. The second bearing chamber 20 is provided with a second drainage channel 162 in communication with the second chamber 24. The second drainage channel 162 can be arranged at the bottom of the second bearing chamber 20 to facilitate the drainage of the accumulated water in the second bearing chamber 20 and prevent the oil seal 12 outside the second bearing chamber 20 from failing.

[0064] A liquid equalizing passage 25 connecting the first chamber 23 and the second chamber 24 is provided inside the housing 17 below the rotor 6. When one of the first chamber 23 and the second chamber 24 is a high water level chamber with a water level higher than the liquid equalizing passage 25, and the other is a low water level chamber with a water level lower than the liquid equalizing passage 25, the water in the high water level chamber can flow into the low water level chamber through the liquid equalizing passage 25.

[0065] In the above example, when condensed water is generated in the first bearing chamber 19 and the second bearing chamber 20, the condensed water in the first bearing chamber 19 can flow into the first chamber 23 along the first drainage channel 161, and the condensed water in the second bearing chamber 20 can flow into the second chamber 24 along the second drainage channel 162. As the condensed water gradually accumulates and increases, there is a risk that the condensed water level inside the motor will submerge the rotor 6. If there is no equalizing liquid channel 25 connecting the first chamber 23 and the second chamber 24, when there is more water accumulation at the single-side bearing inside the motor and less water accumulation on the other side, it is more likely to cause the risk of water accumulation in the single-side chamber to submerge the motor rotor 6. If the motor is in operation at this time, it is easy to cause the accumulated water to splash, which is more likely to cause the risk of corrosion and leakage. The present invention can form a communicating vessel effect by setting a equalizing liquid channel 25 connecting the first chamber 23 and the second chamber 24 below the rotor 6, reducing the risk, so that the water in the high water level chamber can quickly flow into the low water level chamber through the equalizing liquid channel 25, so as to avoid the accumulated water submerging the rotor 6 and affecting the performance of the motor.

[0066] In order to realize the function of the aforementioned liquid equalization channel 25, in some embodiments, as Figure 1 As shown, the aforementioned stator 7 comprises a stator core 71 and a stator winding 8, and the stator winding 8 is wound on the stator core 71. Figure 5 As shown, the aforementioned liquid equalizing channel 25 includes a water groove 701 arranged at the bottom of the stator core 71, and the water groove 701 passes through the axial ends of the stator core 71. The liquid equalizing channel 25 is connected to the aforementioned first chamber 23 and the second chamber 24 through the water groove 701.

[0067] In the above example, by setting the water passage 701 at the bottom of the stator core 71 , it is helpful to prevent the accumulated water from submerging the rotor 6 .

[0068] In some embodiments, the stator core 71 may be interference fit with the inner wall of the housing 17 to achieve the function of keeping the stator 7 and the housing 17 relatively fixed.

[0069] In some embodiments, Figure 1 As shown, the bottom of the first chamber 23 may be provided with a first drain hole 9 that can be opened and closed, and the first drain hole 9 may be opened periodically to drain the first chamber 23. In a specific application example, the first drain hole 9 may be threadedly connected with a first bolt 10, and the first drain hole 9 may be opened by unscrewing the first bolt 10, or the first drain hole 9 may be closed by screwing the first bolt 10 in.

[0070] Similarly, if Figure 1 As shown, a second drain hole 21 that can be opened and closed may be provided at the bottom of the second chamber 24. The second drain hole 21 may be opened periodically to drain the second chamber 24. In a specific application example, a second bolt 22 may be threadedly connected to the second drain hole 21, and the second drain hole 21 may be opened by unscrewing the second bolt 22, or the second drain hole 21 may be closed by screwing the second bolt 22 in.

[0071] like Figure 1 As shown, the motor of the present invention further includes a rotor pressure plate 5 , and the number of the rotor pressure plates 5 is two and they are distributed on both axial sides of the rotor 6 to position the rotor 6 .

[0072] In some embodiments, Figure 1 and Figure 6 As shown, the motor of the present invention may also include a second end cover 11, an oil seal 12, an oil seal baffle 13 and a dust cover 14. The second end cover 11 is provided with a second through hole, and the aforementioned rotating shaft 4 passes through the second end cover 11 through the second through hole. The oil seal 12 is arranged at the second through hole. The oil seal baffle 13 is sleeved on the outer side of the rotating shaft 4 and covers the oil seal 12. A first annular protrusion 131 extending along the axial direction of the rotating shaft 4 is provided on the side of the oil seal baffle 13 away from the oil seal 12. The dust cover 14 is sleeved on the outer side of the rotating shaft 4, and the dust cover 14 covers the side of the oil seal baffle 13 away from the oil seal 12. The dust cover 14 has a second annular protrusion 141 extending toward the side where the oil seal 12 is located, and the second annular protrusion 141 is sleeved on the outer periphery of the first annular protrusion 131. Among them, an annular convex hull 133 extending in the circumferential direction is provided on the inner peripheral wall of the first annular protrusion 131.

[0073] In the above example, the oil seal baffle 13 is located outside the oil seal 12 to form the first layer of protection, and the dust cover 14 is located outside the oil seal baffle 13 to form the second layer of protection. When the motor is working, the dust cover 14 rotates with the rotating shaft 4, and a small gap is left between the dust cover 14 and the oil seal baffle 13. The dust cover 14 can prevent large volumes of mud and sand from flying into the oil seal 12 under harsh working conditions. Among them, the first annular protrusion 131 on the oil seal baffle 13 and the second annular protrusion 141 on the dust cover 14 cooperate to form a maze structure, which can prevent small-volume particulate impurities from entering the motor.

[0074] The annular convex bump 133 on the inner peripheral wall of the first annular protrusion 131 can further block the debris entering and flowing into the oil seal baffle 13, thereby reducing the inflow of the debris into the motor.

[0075] The above-mentioned oil seal baffle 13 and dust cover 14 cooperate to reduce the risk of water immersion at the oil seal 12, thereby extending the service life of the oil seal 12 and preventing the oil seal 12 from being damaged and leaking, thereby improving the reliability of the motor. In addition, the cost increase problem caused by the need to frequently replace the oil seal 12 is also solved.

[0076] In some embodiments, Figure 6 As shown, the bottom of the first annular protrusion 131 may have a discharge hole 130 , and the discharge hole 130 is used to drain the water entering the oil seal baffle 13 .

[0077] In some embodiments, Figure 6 As shown, the number of the annular convex bumps 133 may be more than two, and they are arranged in sequence along the axial direction of the motor.

[0078] In some embodiments, Figure 1 As shown, the aforementioned oil seal baffle 13 can be fixed on the second end cover 11, for example, the oil seal baffle 13 can be fixed on the second end cover 11 by screws, etc. A flange 15 can be fixed on the aforementioned rotating shaft 4, and the dust cover 14 can be fixed on the flange 15 to be fixedly connected to the rotating shaft 4 through the flange 15.

[0079] In some embodiments, Figure 6 As shown, the end of the first annular protrusion 131 facing away from the oil seal 12 may have an outer flange 132 , and the outer flange 132 is located on the inner side of the second annular protrusion 141 .

[0080] In the above example, by providing the outer flange 132, the flow channel between the outside and the inside of the oil seal baffle 13 can be extended to increase the flow resistance, which is beneficial to further reduce the inflow of debris into the inside of the motor.

[0081] Among them, the motor protection level is a key condition to measure the quality of a motor. At present, the working conditions of automotive motors are poor, and they are often in high-humidity and high-temperature environments such as sand, mud and water, which brings great challenges to the protection of the motors. In addition, the working environment of automotive motors changes with day and night, and the alternating temperature difference is very likely to cause condensation in a high-humidity environment. The accumulation of condensation over time causes water accumulation inside the motor, which is more likely to cause protection failure, causing great erosion to the internal parts of the motor. In severe cases, it may even cause the entire machine to be scrapped, bringing great safety hazards to the automotive working conditions. Based on the many tests brought by the above automotive working conditions, the present invention starts from the perspective of the entire machine system and uniformly designs the problems of motor condensation, water leakage, etc. from the outside to the inside, which can greatly improve the sealing reliability of the entire machine and reduce the possibility of erosion of motor parts due to protection failure. Among them, the bearing pull plate 3 of the present invention, the first drainage channel 161 on the first bearing chamber 19, the second drainage channel 162 on the second bearing chamber 20, the water groove 701 at the bottom of the stator core 71, the oil seal baffle 13 and the dust cover 14 cooperate to systematically and comprehensively solve the condensation problem inside the motor before and after condensation occurs. The solution of the present invention can reduce the probability of condensation formation in all types of IP67 and above motors.

[0082] Specifically, when the motor generates heat during operation, the aforementioned bearing pull plate 3 is a dynamic anti-condensation baffle, which can prevent the hot air inside the motor cavity 100 from immediately entering the first bearing chamber 19 over a large area. In this way, the condensation phenomenon can be guided to the motor cavity 100 where the harm is less (because the surface of the iron core and copper wire inside the motor are soaked in insulating paint and are not easily exposed to water, the impact is relatively small), thereby greatly reducing the probability of affecting the insulation of the motor, and setting a drainage structure (i.e., the aforementioned first drainage channel 161 and second drainage channel 162) inside the first bearing chamber 19 and the second bearing chamber 20 where condensation may occur, to further guide the condensed water to the motor cavity 100, and finally set a water storage space at the bottom of the first chamber 23 and the second chamber 24 to complete the drainage operation at a regular interval, thereby solving the problem of poor anti-condensation effect in the prior art.

[0083] like Figure 7 As shown, the present invention also provides an assembly method for a motor, when the aforementioned bearing chamber structure also includes a first end cover 1, and the first bearing chamber 19 is arranged on the first end cover 1; the bearing pull plate 3 is fixed to the first end cover 1 by a fastener; and the bearing pull plate 3 is provided with a first hole 30 for cooperating with the fastener, and the first end cover 1 is provided with a second hole 101 for cooperating with the fastener, the above-mentioned assembly method includes: first assembling the bearing pull plate 3 onto the rotating shaft 4, and then passing the guide tool 28 through the first hole 30 and the second hole 101 in sequence, and then moving the bearing pull plate 3 to the aforementioned opening 191 under the guidance of the guide tool 28; then pulling out the guide tool 28; and then assembling the fastener into the first hole 30 and the second hole 101.

[0084] In the above example, the first hole 30 and the second hole 101 have dual functions. On the one hand, they serve as guide holes for guiding the installation of the bearing pull plate 3, and on the other hand, they serve as fastening holes to cooperate with fasteners to fix the first end cover 1 and the bearing pull plate 3.

[0085] It should be noted here that: when the assembly work of the motor reaches the stage of hoisting, the rotor assembly 27 can be hoisted using the hoisting holes, and when the bearing pull plate 3 is a two-half structure, the two halves of the bearing pull plate 3 are assembled to the correct positions on the rotating shaft 4, and the two halves of the bearing pull plate 3 are fixed; then the guiding tool 28 is used to pass through any first hole 30 and the corresponding second hole 101 on the bearing pull plate 3 to ensure that the installation position of the bearing pull plate 3 in all directions is correct and the assembly is completed. This design requires the guiding tool 28 to guide the bearing pull plate 3 to ensure that the first hole 30 and the second hole 101 on both the bearing pull plate 3 and the first end cover 1 are aligned.

[0086] The present invention also provides a car, comprising any one of the motors described above. Since the car adopts the motor, the air inside the motor cavity 100 can be effectively prevented from moving into the first bearing chamber 19, thereby avoiding the formation of condensation inside the first bearing chamber 19 due to the crossover of cold and hot, thereby reducing the condensation inside the first bearing chamber 19 and reducing the accumulation of water inside the first bearing chamber 19.

[0087] In some embodiments, the above-mentioned automobile may be a new energy automobile.

[0088] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A bearing chamber structure, characterized in that: It comprises a first bearing chamber (19) and a bearing pull plate (3), wherein the bearing pull plate (3) is used to apply force to a first bearing (2) installed in the first bearing chamber (19) so as to press the first bearing (2) against the bottom surface (192) of the first bearing chamber; One end of the first bearing chamber (19) has an opening (191), the bearing pull plate (3) covers the opening (191), and the bearing pull plate is provided with a first through hole (31); when the bearing chamber structure is applied to a motor, the bearing pull plate (3) can be sleeved on the rotating shaft (4) of the motor through the first through hole (31), and sealably cooperate with the rotating shaft (4) to separate the first bearing chamber (19) and the motor cavity (100) of the motor.

2. The bearing chamber structure according to claim 1, characterized in that: The bearing pull plate (3) and the first bearing chamber (19) remain relatively fixed; wherein the circumferential side wall of the first through hole (31) and the rotating shaft (4) can be plugged together, and the two are rotated and sealed at the plug-in point to seal between the rotating shaft (4) and the bearing pull plate (3).

3. The bearing chamber structure according to claim 2, characterized in that: The first through hole (31) has a first section (311) along the axial direction of the rotating shaft (4), and the rotating shaft (4) is provided with an annular groove (41), and the circumferential side wall of the first through hole (31) is inserted into the annular groove (41) through the first section (311) to achieve plug-in fit with the rotating shaft (4); wherein, The rotating shaft (4) has a pull plate fitting section (42) in the axial direction, the outer diameter of the pull plate fitting section (42) is d, the annular groove (41) is arranged on the pull plate fitting section (42), the depth of the annular groove (41) is h=d / a, and the first section (311) is rotationally sealed with the bottom surface and the side surface of the annular groove (41), wherein a=24-26; And / or, the first through hole (31) also has a second section (312) along the axial direction of the rotating shaft (4), the second section (312) is a flared section relative to the first section (311), a step (32) is formed between the first section (311) and the second section (312), and the second section (312) is rotationally sealed with the outer wall of the pull plate mating section (42).

4. The bearing chamber structure according to claim 2 or 3, characterized in that: The bearing pull plate (3) is a two-half structure, and is respectively a first half bearing pull plate (301) and a second half bearing pull plate (302); the first through hole (31) is divided into two halves, one half of the first through hole (31) is located on the first half bearing pull plate (301), and the other half is located on the second half bearing pull plate (302).

5. The bearing chamber structure according to any one of claims 1 to 3, characterized in that: The bearing pull plate (3) covers the opening (191) by abutting against the end surface of the opening (191).

6. The bearing chamber structure according to any one of claims 1 to 3, characterized in that: It also includes a first end cover (1), the first bearing chamber (19) is arranged on the first end cover (1); the bearing pull plate (3) is fixed to the first end cover (1) by a fastener; wherein the bearing pull plate (3) is provided with a first hole (30) for cooperating with the fastener, and the first end cover (1) is provided with a second hole (101) for cooperating with the fastener.

7. A motor, characterized in that: The invention comprises the bearing chamber structure according to any one of claims 1 to 6.

8. The motor according to claim 7, characterized in that: The motor is a horizontal motor, comprising a housing (17), a second bearing chamber (20) and a motor assembly; the motor assembly comprises a rotor (6) sleeved on the rotating shaft (4); the motor assembly is installed in the housing (17), and a first chamber (23) and a second chamber (24) are formed inside the housing (17) on both sides of the axial direction of the motor assembly; the first bearing chamber (19) is arranged in the first chamber (23), and the first bearing chamber (19) is provided with a first drainage channel (161) communicating with the first chamber (23); the second bearing chamber (20) is arranged in the second chamber (24), and the second bearing chamber (20) is provided with a second drainage channel (162) communicating with the second chamber (24); A liquid equalizing channel (25) connecting the first chamber (23) and the second chamber (24) is provided inside the casing (17) below the rotor (6); when one of the first chamber (23) and the second chamber (24) is a high water level chamber with a water level higher than the liquid equalizing channel (25), and the other is a low water level chamber with a water level lower than the liquid equalizing channel (25), water in the high water level chamber can flow into the low water level chamber through the liquid equalizing channel (25).

9. The motor according to claim 8, characterized in that: The motor assembly also has a stator (7) for driving the rotor (6) to rotate, the stator (7) having a stator core (71), the liquid balancing channel (25) comprising a water trough (701) arranged at the bottom of the stator core (71), the water trough (701) passing through the axial ends of the stator core (71), and the liquid balancing channel (25) is connected to the first chamber (23) and the second chamber (24) through the water trough (701).

10. The motor according to claim 8 or 9, characterized in that: The bottom of the first chamber (23) is provided with a first drainage hole (9) that can be opened and closed; and / or the bottom of the second chamber (24) is provided with a second drainage hole (21) that can be opened and closed.

11. The motor according to any one of claims 7 to 9, characterized in that: It also includes a second end cover (11), an oil seal (12), an oil seal baffle (13) and a dust cover (14); the second end cover (11) is provided with a second through hole, the rotating shaft (4) passes through the second through hole, and the oil seal (12) is arranged at the second through hole; The oil seal baffle (13) is sleeved on the outer side of the rotating shaft (4) and covers the oil seal (12); a first annular protrusion (131) extending along the axial direction of the rotating shaft (4) is provided on the side of the oil seal baffle (13) away from the oil seal (12); the dust cover (14) is sleeved on the outer side of the rotating shaft (4) and covers the side of the oil seal baffle (13) away from the oil seal (12); the dust cover (14) has a second annular protrusion (141) extending toward the side where the oil seal (12) is located; the second annular protrusion (141) is sleeved on the outer periphery of the first annular protrusion (131); Wherein, an annular convex hump (133) extending in the circumferential direction is provided on the inner peripheral wall of the first annular protrusion (131).

12. The motor according to claim 11, characterized in that: An end of the first annular protrusion (131) facing away from the oil seal (12) has an outer flange (132), and the outer flange (132) is located on the inner side of the second annular protrusion (141).

13. A method for assembling a motor according to any one of claims 7 to 12, characterized in that: When the bearing chamber structure further comprises a first end cover (1), the first bearing chamber (19) is arranged on the first end cover (1); the bearing plate (3) is fixed to the first end cover (1) by a fastener; and the bearing plate (3) is provided with a first hole (30) for cooperating with the fastener, and the first end cover (1) is provided with a second hole (101) for cooperating with the fastener, The assembly method comprises: first assembling the bearing pull plate (3) onto the rotating shaft (4), then passing the guide tool (28) through the first hole (30) and the second hole (101) in sequence, and then moving the bearing pull plate (3) to the opening (191) under the guidance of the guide tool (28); then pulling out the guide tool (28); and then assembling the fastener into the first hole (30) and the second hole (101).

14. A car, characterized in that: A motor comprising any one of claims 7-12.

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