Motor shell assembly and motor

Abstract

The utility model discloses a motor housing assembly and a motor, and the motor housing assembly comprises a housing which defines an installation cavity with an opening, and the inner wall of the installation cavity is provided with a first step of which the diameter is increased towards one side close to the opening; the rear cover is arranged in the installation cavity and is in interference fit with the machine shell, the matching face of the rear cover and the machine shell is located on the inner side of the first step face of the first step, on the outer side of the first step face, the peripheral wall of the rear cover and the inner wall of the installation cavity are arranged at intervals and define a sealed space with an opening, and the sealing piece is arranged in the sealed space; according to the motor shell assembly, the assembling cost of the rear cover is low, the axial length of the motor is shortened, miniaturization and light weight of the motor are achieved, the assembling difficulty of the sealing piece is low, the sealing cost is reduced, and the sealing effect is better.

Description

Technical Field

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

[0002] The rear cover of the traditional motor housing assembly is provided with a boss structure protruding from the end of the housing. The boss structure extends from the installation cavity to the outside of the installation cavity. Through the screw through holes opened on the boss structure, the rear cover and the housing can be fixedly connected by screws, and the rear cover is assembled and fixed by screws. The assembly process is complex, and a large number of parts are used in the assembly process. The complex installation structure also affects the overall axial length of the motor, resulting in a large volume of the motor, which is not conducive to the miniaturization and light weight of the motor. For the sealing of the motor, it is necessary to block the leakage channels between the rear cover and the housing and between the mounting plate and the rear cover, that is, it is necessary to set sealing structures between the rear cover and the housing and between the fan mounting plate and the rear cover. Multiple sets of sealing structures need to be set, there are many leakage channels, the sealing effect is poor, and the sealing reliability is low, so there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the above technical problems in the prior art to a certain extent. For this purpose, the utility model provides a motor housing assembly, the assembly cost of the rear cover of the motor housing assembly is low, the axial length of the motor is shortened, the miniaturization and light weight of the motor are realized, the assembly difficulty of the sealing member is low, the sealing cost is also reduced, and the sealing effect is better.

[0004] The utility model also provides a motor with the above motor housing assembly.

[0005] According to the motor housing assembly of the first aspect embodiment of the utility model, it includes: a housing, the housing defines an installation cavity with an opening, and a first step with a diameter increasing towards the side close to the opening is formed on the inner wall of the installation cavity;

[0006] A rear cover, the rear cover is arranged in the installation cavity and is in interference fit with the housing. The mating surface of the rear cover and the housing is located inside the first step surface of the first step. On the outside of the first step surface, the outer peripheral wall of the rear cover and the inner wall of the installation cavity are spaced apart and define a sealing space with an open end, and a sealing member is arranged in the sealing space;

[0007] A mounting plate, the mounting plate cooperates with the outer end surface of the rear cover and closes the open end.

[0008] According to the motor housing assembly of the embodiment of the utility model, the assembly cost of the rear cover of the motor housing assembly is low, the axial length of the motor is shortened, the miniaturization and light weight of the motor are realized, the assembly difficulty of the sealing member is low, the sealing cost is also reduced, and the sealing effect is better.

[0009] In addition, the motor housing assembly according to the embodiments of the utility model may further have the following additional technical features:

[0010] According to some embodiments of the present utility model, a first connection portion is provided on the rear cover, a first mating portion is provided on the mounting plate, and the first connection portion is in mating connection with the first mating portion.

[0011] According to some embodiments of the present utility model, the first connection portion includes a first connection hole, the mating portion includes a first mating hole, the rear cover and the mounting plate are connected by a first fastener, and the first fastener passes through the first connection hole and the first mating hole.

[0012] According to some embodiments of the present utility model, the outer end face of the rear cover is flush with the outer end face of the housing, the mounting plate is in mating connection with both the outer end face of the rear cover and the outer end face of the housing, a second connection hole is provided on the housing, a second mating hole is provided on the mounting plate, and the housing and the mounting plate are connected by a second fastener, and the second fastener passes through the second connection hole and the second mating hole.

[0013] According to some embodiments of the present utility model, the motor housing assembly further includes: a limiting member, the outer end face of the mounting plate is flush with the outer end face of the housing, the limiting member is connected to the housing, and the limiting member is in limiting mating connection with the outer end face of the mounting plate.

[0014] According to some embodiments of the present utility model, a second step with a diameter decreasing towards the side close to the opening is formed on the outer peripheral wall of the rear cover, the second step surface of the second step is flush with the first step surface, and the sealing member is in mating connection with both the first step surface and the second step surface.

[0015] According to some embodiments of the present utility model, the sealing member includes: sealant and / or sealing ring.

[0016] According to some embodiments of the present utility model, at least a part of the outer end face of the housing and / or the rear cover close to the mating surface is inclined in a direction away from the opening in the direction close to the mating surface, forming a guiding surface.

[0017] The motor according to the second aspect embodiment of the present utility model includes the motor housing assembly described in the above embodiments.

[0018] According to some embodiments of the present utility model, the motor further includes: a bearing, a resolver stator assembly, and a cooling fan, the bearing and the resolver stator assembly are supported on the rear cover, and the cooling fan is provided on the mounting plate. Description of the Drawings

[0019] Figure 1 is a partial cross-sectional view of a motor according to an embodiment of the present utility model;

[0020] Figure 2 is a partial cross-sectional view of a motor according to an embodiment of the present utility model;

[0021] Figure 3 is a partial cross-sectional view of a motor according to another embodiment of the present utility model;

[0022] Figure 4 is a partial cross-sectional view of a motor according to still another embodiment of the present utility model;

[0023] Figure 5 is Figure 4 a partial enlarged view at A;

[0024] Figure 6 is a partial cross-sectional view of the connection between the mounting plate and the housing of a motor according to an embodiment of the present utility model;

[0025] Figure 7 is a partial cross-sectional view of the connection between the mounting plate and the rear cover of a motor according to an embodiment of the present utility model.

[0026] Reference numerals:

[0027] Housing 1, mounting cavity 11, opening 111, first step surface 12, limiting member 13, rear cover 2, second step surface 21, connection hole 22, mounting plate 3, mating hole 31, sealing space 4, open end 41, seal 5, cooling fan 6, guiding surface 7, fastener 8, bearing 91, wave washer 92, resolver stator assembly 93, heat dissipation plate 94. Detailed Description of the Embodiment

[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] Reference is made below to Figures 1-7 describe the motor housing assembly according to an embodiment of the present utility model.

[0031] The motor housing assembly according to an embodiment of the present utility model may include: a housing 1, a rear cover 2 and a mounting plate 3.

[0032] Wherein, the mounting plate 3 is the mounting plate 3 for the cooling fan 6, the mounting plate 3 of the cooling fan 6 is provided at the end of the rear cover 2, and the rear cover 2 is mainly used for supporting a bearing 91, a wave washer 92, a resolver stator assembly 93, etc. The housing 1 defines a mounting cavity 11 with an opening 111, and the bearing 91, the wave washer 92, the resolver stator assembly 93, etc. are all arranged in the mounting cavity 11. The rear cover 2 is arranged on the side of the opening 111 of the housing 1 and jointly closes the opening 111 of the mounting cavity 11 with the mounting plate 3, so as to form a closed space in the mounting cavity 11 and prevent liquid or foreign matters outside the mounting cavity 11 from entering the mounting cavity 11.

[0033] For the rear cover of the traditional motor housing assembly, there is a boss structure protruding from the end of the housing. The boss structure extends from inside the mounting cavity to outside the mounting cavity. Through the screw through holes formed on the boss structure, the rear cover and the housing can be fixedly connected by screws, and the assembly and fixation of the rear cover are realized by screws. The assembly process is complex, and a relatively large number of parts are used in the assembly process. The complex installation structure also affects the overall axial length of the motor, resulting in a large volume of the motor, which is not conducive to the miniaturization and light weight of the motor. For the sealing of the motor, it is necessary to block the leakage channels between the rear cover and the housing and between the mounting plate and the rear cover, that is, it is necessary to provide sealing structures between the rear cover and the housing and between the fan mounting plate and the rear cover. Multiple groups of sealing structures need to be provided, there are many leakage channels, the sealing effect is poor, and the sealing reliability is low.

[0034] To this end, the embodiment of the present utility model designs a motor housing assembly in which a rear cover 2 is disposed inside a housing 1 through interference fit, and a seal 5 provided in a sealing space 4 is used to seal two different leakage channels. Thus, during the assembly process of the rear cover 2, no fasteners 8 are required, and no boss structure for the assembly of the fasteners 8 needs to be designed, reducing the assembly cost of the rear cover 2. The rear cover 2 is disposed in an installation cavity 11 and does not protrude from the housing 1, so the overall axial length of the motor is shorter, achieving miniaturization and light weight of the motor. At the same time, the sealing cost is reduced while ensuring the sealing effect, and the assembly difficulty of the seal 5 is also reduced.

[0035] Specifically, there are two leakage channels that need to be sealed on the motor housing assembly, including the leakage channel formed between the rear cover 2 and the housing 1 and the leakage channel formed between the mounting plate 3 and the rear cover 2. In the prior art, usually, a first sealing groove with an opening facing the housing and a second sealing groove with an opening facing the mounting plate are formed on the rear cover, and seals are respectively arranged in the first sealing groove and the second sealing groove to seal the two leakage channels. Multiple sets of sealing structures need to be set, there are many leakage channels, the sealing effect is poor, and the sealing reliability is low.

[0036] To this end, the motor housing assembly of the embodiment of the present utility model is provided with a sealing space 4 that simultaneously communicates with the two leakage channels that need to be sealed. By arranging a seal 5 in the sealing space 4 and sealing the sealing space 4, the sealing of the two leakage channels can be achieved.

[0037] Specifically, at the end of the mating surface between the rear cover 2 and the housing 1 and at the edge of the mating surface between the rear cover 2 and the mounting plate 3, there is a sealing space 4. The seal 5 arranged in the sealing space 4 can simultaneously seal the leakage channel formed between the rear cover 2 and the housing 1 and the leakage channel formed between the mounting plate 3 and the rear cover 2, reducing the sealing cost while ensuring the sealing effect and reducing the assembly difficulty.

[0038] As Figure 1 shown, the rear cover 2 is disposed in the installation cavity 11 and is in interference fit with the housing 1. The rear cover 2 is disposed inside the housing 1 through interference fit. Thus, during the assembly process of the rear cover 2, no fasteners 8 are required, and no boss structure for the assembly of the fasteners 8 needs to be designed, reducing the assembly cost of the rear cover 2. The rear cover 2 is disposed in the installation cavity 11 and does not protrude from the housing 1, so the overall axial length of the motor is shorter, achieving miniaturization and light weight of the motor.

[0039] Furthermore, the mounting plate 3 is fitted to the outer end face of the rear cover 2. For the sealing of the leakage channels formed between the rear cover 2 and the housing 1 and between the mounting plate 3 and the rear cover 2, at one end of the mating surface of the rear cover 2 and the housing 1 in the axial direction towards the opening 111 and at the end of the mating surface of the mounting plate 3 and the rear cover 2 in the radial direction, a sealing space 4 is provided which communicates with both the leakage channel formed between the rear cover 2 and the housing 1 and the leakage channel formed between the mounting plate 3 and the rear cover 2. The seal 5 provided in the sealing space 4 can simultaneously seal the leakage channel formed between the rear cover 2 and the housing 1 and the leakage channel formed between the mounting plate 3 and the rear cover 2.

[0040] Specifically, a first step with a diameter increasing towards the side closer to the opening 111 is formed on the inner wall of the mounting cavity 11. The mating surface of the rear cover 2 and the housing 1 is located inside the first step surface 12 of the first step. Outside the first step surface 12, the outer peripheral wall of the rear cover 2 is spaced from the inner wall of the mounting cavity 11 and defines a sealing space 4 with an opening 41. Herein, the inner side of the mounting cavity 11 is the side far from the opening 111 inside the mounting cavity 11, and the outer side of the mounting cavity 11 is the side close to the opening 111 inside the mounting cavity 11.

[0041] Since the mating surface of the rear cover 2 and the housing 1 is located inside the first step surface 12 of the first step, therefore, outside the first step surface 12, the sealing space 4 defined by the spaced outer peripheral wall of the rear cover 2 and the inner wall of the mounting cavity 11 can seal the leakage channel formed by the mating surface of the rear cover 2 and the housing 1 located inside the first step surface 12.

[0042] The seal 5 is provided in the sealing space 4. The mounting plate 3 is fitted to the outer end face of the rear cover 2 and closes the opening 41. That is to say, a closed sealing space 4 is defined among the mounting plate 3, the rear cover 2 and the housing 1. The sealing space 4 communicates with both the leakage channel formed by the mating surface of the mounting plate 3 and the rear cover 2 and the leakage channel formed by the mating surface of the rear cover 2 and the housing 1. The seal 5 provided in the sealing space 4 can close both the leakage channel formed by the mating surface of the mounting plate 3 and the rear cover 2 and the leakage channel formed by the mating surface of the rear cover 2 and the housing 1 while closing the sealing space 4, simplifying the sealing structure of the motor, reducing the sealing cost of the motor, and having a better sealing effect.

[0043] During the process of the mounting plate 3 being fitted to the outer end face of the rear cover 2 and closing the opening 41, the seal 5 provided in the sealing space 4 is compressed by the mounting plate 3 during the installation of the mounting plate 3. The seal 5 can be fully filled and sealed in the sealing space 4 under force. The pressure between the seal 5 and the wall surface of the sealing space 4 is greater, and the sealing effect is stronger and better.

[0044] According to the motor housing assembly of the embodiments of the present utility model, the assembly cost of the rear cover 2 of the motor housing assembly is low, the axial length of the motor is shortened, miniaturization and light weight of the motor are achieved, the assembly difficulty of the seal 5 is low, the sealing cost is also reduced, and the sealing effect is better.

[0045] Since the mounting plate 3 needs to close the opening 41 of the sealing space 4 defined by the rear cover 2 and the housing 1, therefore, the assembly position of the mounting plate 3 can be that the mounting plate 3 is arranged in the mounting cavity 11, and the outer peripheral wall of the mounting plate 3 cooperates with the inner wall of the housing 1, or the mounting plate 3 is arranged outside the mounting cavity 11, and the mounting plate 3 cooperates with the outer end face of the housing 1.

[0046] As Figure 7 shown, when the mounting plate 3 is arranged in the mounting cavity 11 or outside the mounting cavity 11, the mounting plate 3 can be assembled by connecting with the rear cover 2.

[0047] In some embodiments, a first connecting portion is provided on the rear cover 2, and a first mating portion is provided on the mounting plate 3. The first connecting portion and the first mating portion are connected in a mating manner. Through the cooperation of the first connecting portion and the first mating portion, the mounting plate 3 can be fixedly connected to the rear cover 2, thereby realizing the assembly of the mounting plate 3.

[0048] In some embodiments, the mounting plate 3 can be assembled by connecting with the rear cover 2 through a fastener 8. Specifically, the first connecting portion includes a first connecting hole 22, the mating portion includes a first mating hole 31, the rear cover 2 and the mounting plate 3 are connected by a first fastener 8, the first fastener 8 passes through the first connecting hole 22 and the first mating hole 31, and the first fastener 8 extends axially and passes through the first connecting hole 22 and the first mating hole 31. Through the connection and cooperation of the first connecting hole 22 and the first mating hole 31, the connection between the rear cover 2 and the mounting plate 3 can be realized.

[0049] Moreover, during the process of assembling the mounting plate 3 on the rear cover 2 by the fastener 8, the mounting plate 3 can be closely attached to the outer end face of the rear cover 2 under the action of the fastener 8. When the seal 5 is an O-ring, under the fastening action of the fastener 8, the mounting plate 3 can close the opening 41 of the sealing space 4 and compress the O-ring in the sealing space 4. The mounting plate 3 gives an extrusion force to the O-ring between the first step surface 12 of the housing 1. The O-ring is compressed and deformed until the mounting plate 3 is assembled in place. During this process, the O-ring is compressed. After the mounting plate 3 is assembled, the O-ring can apply a greater force to the wall surface of the sealing space 4, so that the sealing surface formed between the O-ring and the wall surface of the sealing space 4 has a better sealing effect.

[0050] The sealing ring is compressed within the sealing space 4. The sealing ring cooperates with the mounting plate 3 and the first stepped surface 12. The leakage channels formed between the mounting plate 3 and the rear cover 2 and between the rear cover 2 and the housing 1 are both located inside the sealing surfaces formed by the cooperation of the sealing ring with the first stepped surface 12 of the housing 1 and the sealing surface formed by the cooperation of the sealing ring with the mounting plate 3; while the leakage channel formed between the mounting plate 3 and the housing 1 is located outside the sealing surfaces formed by the cooperation of the sealing ring with the first stepped surface 12 of the housing 1 and the sealing surface formed by the cooperation of the sealing ring with the mounting plate 3.

[0051] The sealing surfaces formed by the cooperation of the sealing ring with the first stepped surface 12 of the housing 1 and the sealing surface formed by the cooperation of the sealing ring with the mounting plate 3 isolate the first leakage channel formed between the rear cover 2 and the housing 1, the second leakage channel formed between the mounting plate 3 and the rear cover 2, and the third leakage channel formed between the mounting plate 3 and the housing 1. Thus, after the liquid or foreign matter outside the installation cavity 11 enters the sealing space 4 through the third leakage channel, under the isolation of the sealing surfaces formed by the cooperation of the sealing ring with the first stepped surface 12 of the housing 1 and the sealing surface formed by the cooperation of the sealing ring with the mounting plate 3, the liquid or foreign matter outside the installation cavity 11 will no longer enter the installation cavity 11 through the first leakage channel and the second leakage channel.

[0052] Thus, it is ensured that the leakage channels formed between the mounting plate 3 and the rear cover 2 and between the rear cover 2 and the housing 1 can be stably sealed.

[0053] During the process of assembling the mounting plate 3 to the rear cover 2 by the fastener 8, the mounting plate 3 can be closely attached to the outer end surface of the rear cover 2 under the action of the fastener 8. When the seal 5 is sealant, before the mounting plate 3 is installed, the sealant is in a full overflow state within the sealing space. The installer is suitable to install the mounting plate when the sealant has not solidified. Under the tightening action of the fastener 8, the mounting plate 3 can close the opening 41 of the sealing space 4 and squeeze part of the sealant between the rear cover 2 and the mounting plate 3. While the mounting plate 3 closes the opening 41 of the sealing space 4, it ensures that the sealant will not flow out of the sealing space and avoids environmental pollution of the sealant by the outside. Moreover, part of the sealant is squeezed between the rear cover 2 and the mounting plate, which can seal the tiny gaps between the rear cover and the mounting plate, enabling the sealant to better seal the leakage channels between the rear cover 2 and the mounting plate 3.

[0054] In some cases, the mounting plate 3 can also be assembled by connecting to the housing 1. Specifically, when the outer end surface of the rear cover 2 is flush with the outer end surface of the housing 1, the mounting plate 3 can cooperate with the outer end surfaces of both the rear cover 2 and the housing 1 at the same time. At this time, the mounting plate 3 is arranged outside the installation cavity 11, and the mounting plate 3 can be assembled by choosing to be assembled and connected to the rear cover 2 or to the housing 1.

[0055] When the mounting plate 3 is assembled with the housing 1 to achieve connection, the mounting plate 3 can be connected to the housing 1 through the fastener 8 for assembly. Specifically, the housing 1 is provided with a second connection hole 22, and the mounting plate 3 is provided with a second mating hole 31. The housing 1 and the mounting plate 3 are connected by the second fastener 8, and the second fastener 8 passes through the second connection hole 22 and the second mating hole 31. The second fastener 8 extends along the axial direction and passes through the second connection hole 22 and the second mating hole 31. Through the connection and cooperation of the second connection hole 22 and the second mating hole 31, the connection between the housing 1 and the mounting plate 3 can be achieved.

[0056] Moreover, during the process of assembling the mounting plate 3 onto the housing 1 by the second fastener 8, the mounting plate 3 can be closely attached to the outer end face of the rear cover 2 under the action of the fastener 8. Under the fastening action of the fastener 8, the mounting plate 3 can close the opening 41 of the sealed space 4 and compress the seal 5 in the sealed space 4. During the compression process of the seal 5, a greater force can be exerted on the wall surface of the sealed space 4, so that the sealing surface formed between the seal 5 and the wall surface of the sealed space 4 has a better sealing effect.

[0057] In some embodiments, the motor housing assembly further includes: a limiting member 13. The mounting plate 3 can also be assembled to the outer end of the rear cover 2 through the limiting action of the limiting member 13. Specifically, when the outer end face of the mounting plate 3 is flush with the outer end face of the housing 1, the limiting member 13 can cooperate with both the outer end face of the mounting plate 3 and the outer end face of the housing 1 at the same time. At this time, the limiting member 13 can be assembled and connected to the housing 1 and limit the mounting plate 3 outside the mounting plate 3, and the limiting member 13 is in limiting cooperation with the outer end face of the mounting plate 3.

[0058] Wherein, the limiting member 13 includes a fixing portion and an extending portion. The fixing portion is fixedly connected to the housing 1, and the extending portion extends along the radial direction of the motor and extends to the outside of the mounting plate 3, and is in limiting cooperation with the outer end face of the mounting plate 3.

[0059] Refer to Figure 6 As shown, the limiting member 13 is a screw. The screw includes a screw head and a screw post. The screw post is screwed and fixed to the housing 1, and a part of the screw head extends to the outside of the mounting plate 3 and is in limiting cooperation with the outer end face of the mounting plate 3.

[0060] Refer to Figure 4 and Figure 5, a second step with a diameter decreasing towards the side closer to the opening 111 is formed on the outer peripheral wall of the rear cover 2. The second step surface 21 of the second step is flush with the first step surface 12. The seal 5 cooperates with both the first step surface 12 and the second step surface 21 simultaneously. At this time, the sealed space 4 is defined by the first step surface 12, the second step surface 21, the rear cover 2, the housing 1, and the mounting plate 3. Since the first step surface 12 is flush with the second step surface 21, the seal 5 provided in the sealed space 4 is not restricted by the angle and can cooperate more closely with the joint between the first step surface 12 and the second step surface 21 and seal it. The seal 5 has a larger sealing area in cooperation with the first step surface 12 and the second step surface 21, and the sealing effect is better.

[0061] Moreover, the formation of the second step surface 21 can increase the cooperation area between the seal 5 and the rear cover 2, thereby increasing the sealing area between the seal 5 and the rear cover 2, ensuring the sealing effect of the seal 5.

[0062] In some embodiments, the seal 5 includes a sealing ring. The sealing ring is provided in the sealed space 4. The sealing ring can include an O-ring, a rectangular ring, a star-shaped ring, etc.

[0063] In other embodiments, the seal 5 includes a sealant. That is to say, during the assembly process, sealant can be filled into the sealed space 4. The permeability of the sealant in the liquid state is used to fill the gaps in the sealed space 4 and the leakage channels, ensuring the sealing effect of the motor housing assembly. Since the open end 41 of the sealed space 4 is closed by the mounting plate 3, it is ensured that the sealant is not contaminated.

[0064] In some embodiments, both sealant and a sealing ring are provided in the sealed space 4. The sealant can be filled at the joint between the rear cover 2 and the housing 1. Due to the fluidity of the sealant, it can penetrate into the tiny gaps formed between the rear cover 2 and the housing 1 and fill the tiny gaps, enabling better sealing of the leakage channels between the rear cover 2 and the housing 1. Further, the sealing ring is then provided in the sealed space 4 to achieve further sealing of the leakage channels between the rear cover 2 and the housing 1 and the sealing of the leakage channels between the mounting plate 3 and the rear cover 2, ensuring the sealing effect.

[0065] Referring to Figures 2-5 , at least a part of the outer end surface of the housing 1 and / or the rear cover 2 close to the mating surface between the rear cover 2 and the housing 1 is inclined in the direction away from the opening 111 in the direction close to the mating surface between the rear cover 2 and the housing 1, forming a guiding surface 7.

[0066] In some embodiments, the seal 5 includes sealant. During the assembly process, the assembler can apply the sealant to the motor with the opening 111 facing upward. The assembler applies the sealant at the guiding surface 7. The sealant has fluidity. Under the action of gravity and the guiding effect of the guiding surface 7, the sealant flows to the mating surface and penetrates into the interior of the mating surface, fully filling the gap between the rear cover 2 and the housing 1. Moreover, part of the glue will gather in the glue groove formed between the guiding surface 7 and the guiding surface 7 or between the guiding surface 7 and the rear cover 2 and solidify in the glue groove. The solidified sealant fills and seals the glue groove formed between the guiding surface 7 and the guiding surface 7 or between the guiding surface 7 and the rear cover 2, thereby achieving the sealing of the leakage channel formed at the mating part between the housing 1 and the rear cover 2, realizing the sealing of the mating part between the housing 1 and the rear cover 2 with less glue and ensuring the sealing effect.

[0067] The motor according to the second aspect embodiment of the present invention includes the motor housing assembly of the above embodiment.

[0068] According to some embodiments of the present invention, the motor further includes: a bearing 91, a resolver stator assembly 93, and a cooling fan 6. The bearing 91 and the resolver stator assembly 93 are supported on the rear cover 2, and the cooling fan 6 is arranged on the mounting plate 3.

[0069] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0070] For other structures of the motor, they are all prior art and well-known to those skilled in the art. Therefore, other structures of the motor will not be described in detail here.

[0071] A specific embodiment of the motor will be described below with reference to the drawings.

[0072] As Figure 1 shown, the motor includes: a motor housing assembly, a bearing 91, a resolver stator assembly 93, and a cooling fan 6. The motor further includes a heat dissipation plate 94, and the heat dissipation plate 94 is sleeved outside the housing 1.

[0073] The motor housing assembly includes: a housing 1, a rear cover 2, and a mounting plate 3.

[0074] Among them, the mounting plate 3 is the mounting plate 3 of the cooling fan 6, and the mounting plate 3 of the cooling fan 6 is arranged at the end of the rear cover 2, and the rear cover 2 is mainly used to support the bearing 91, the corrugated gasket 92, the resolver stator assembly 93, etc. The housing 1 defines a mounting cavity 11 with an opening 111, and the bearing 91, the corrugated gasket 92, the resolver stator assembly 93, etc. are all arranged in the mounting cavity 11, and the rear cover 2 and the mounting plate 3 are arranged at the opening 111 of the housing 1, and the housing 1 and the mounting plate 3 jointly close the opening 111 of the mounting cavity 11, so that a closed space is formed in the mounting cavity 11, and liquid or foreign matter outside the mounting cavity 11 is prevented from entering the mounting cavity 11.

[0075] Since the rear cover 2 is arranged in the installation cavity 11, the distance between the rear cover 2 and the motor stator is shortened, and the mounting plate 3 of the cooling fan 6 is arranged at the end of the rear cover 2. The distance between the mounting plate 3 and the cooling fan 6 arranged on the mounting plate 3 and the motor stator is shortened accordingly. The distance between the cooling fan 6 arranged on the mounting plate 3 and the motor stator is shortened, so that the cooling effect of the cooling fan 6 on the motor stator is better.

[0076] The rear cover 2 is arranged in the installation cavity 11 and has an interference fit with the housing 1. The rear cover 2 is arranged inside the housing 1 through an interference fit. Therefore, the fastener 8 is not required in the assembly process of the rear cover 2, and there is no need to design a boss structure for assembling the fastener 8, which reduces the assembly cost of the rear cover 2. The rear cover 2 is arranged in the installation cavity 11 and does not protrude from the housing 1. The overall axial length of the motor is shorter, and the miniaturization and lightness of the motor are achieved. In addition, the concentricity between the interference-fit rear cover 2 and the housing 1 is better.

[0077] A first step is formed on the inner wall of the installation cavity 11, and the diameter becomes larger toward the side close to the opening 111. A second step is formed on the outer wall of the back cover 2, and the diameter becomes smaller toward the side close to the opening 111. The second step surface 21 of the second step is flush with the first step surface 12. The mating surface between the back cover 2 and the casing 1 is located on the inner side of the first step surface 12 and the second step surface 21 of the first step. On the outer side of the first step surface 12 and the second step surface 21, the outer wall of the back cover 2 is spaced apart from the inner wall of the installation cavity 11 and defines a sealed space 4 with an opening 41. The sealing member 5 is arranged in the sealed space 4. The mounting plate 3 cooperates with the outer end surface of the back cover 2 and closes the opening 41.

[0078] The seal 5 cooperates with the first step surface 12 and the second step surface 21 at the same time. At this time, the sealing space 4 is defined by the first step surface 12, the second step surface 21, the back cover 2, the casing 1 and the mounting plate 3. Since the first step surface 12 is flush with the second step surface 21, the seal 5 arranged in the sealing space 4 will not be limited by the angle, and will cooperate more closely with the joint between the first step surface 12 and the second step surface 21 to seal it. The sealing area of the seal 5 with the first step surface 12 and the second step surface 21 is larger, and the sealing effect is better.

[0079] A closed sealing space 4 is defined between the mounting plate 3, the rear cover 2 and the housing 1. The sealing space 4 is simultaneously communicated with the leakage channels formed by the mating surfaces of the mounting plate 3 and the rear cover 2 and the leakage channels formed by the mating surfaces of the rear cover 2 and the housing 1. The seal 5 provided in the sealing space 4 can close the leakage channels formed by the mating surfaces of the mounting plate 3 and the rear cover 2 and the leakage channels formed by the mating surfaces of the rear cover 2 and the housing 1 while closing the sealing space 4, which simplifies the sealing structure of the motor, reduces the sealing cost of the motor, and has a better sealing effect.

[0080] During the process of the outer end surfaces of the mounting plate 3 and the rear cover 2 being mated and closing the opening 41, the seal 5 provided in the sealing space 4 is compressed by the mounting plate 3 during the installation process of the mounting plate 3. The seal 5 can be forced to fully fill and seal the sealing space 4. The pressure between the seal 5 and the wall surface of the sealing space 4 is greater, and the sealing effect is stronger and better.

[0081] The seal 5 is compressed in the sealing space 4. The seal 5 cooperates with the mounting plate 3 to seal the leakage channel between the mounting plate 3 and the rear cover 2. The seal 5 cooperates with the rear cover 2 to seal the leakage channel between the mounting plate 3 and the rear cover 2 and the leakage channel between the rear cover 2 and the housing 1. The seal 5 cooperates with the housing 1 to seal the leakage channel between the rear cover 2 and the housing 1.

[0082] A first guiding surface 7 is formed at one end of the first step surface 12 facing the rear cover 2 and is inclined in a direction away from the opening 111 in the direction approaching the rear cover 2. A second guiding surface 7 is formed at one end of the second step surface 21 facing the housing 1 and is inclined in a direction away from the opening 111 in the direction approaching the housing 1. A glue groove is defined between the first guiding surface 7 and the second guiding surface 7.

[0083] During the assembly process, the assembler can apply the sealing glue to the motor with the opening 111 facing upward. The assembler applies the sealing glue at the glue groove. The sealing glue has fluidity. Under the action of gravity and the guiding action of the guiding surface 7, the sealing glue flows to the mating surface of the housing 1 and the rear cover 2 and penetrates into the mating surface, fully filling the gap between the rear cover 2 and the housing 1.

[0084] Moreover, part of the glue will collect in the glue groove and solidify in the glue groove. By filling and sealing the glue groove with the solidified sealing glue, the sealing of the leakage channel formed at the mating part between the housing 1 and the rear cover 2 can be achieved, so as to seal the mating part between the housing 1 and the rear cover 2 with less glue and ensure the sealing effect.

[0085] Further, the sealing ring is further disposed in the sealing space 4 to further seal the leakage channels between the rear cover 2 and the housing 1 and the leakage channels between the mounting plate 3 and the rear cover 2, ensuring the sealing effect.

[0086] Further, the sealing ring is disposed in the sealing space to further seal the leakage channels between the rear cover and the housing and the leakage channels between the mounting plate and the rear cover, ensuring the sealing effect.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A motor housing assembly, characterized in that, Comprising: A housing, the housing defining an installation cavity with an opening, and a first step with a gradually increasing diameter towards the side close to the opening being formed on the inner wall of the installation cavity; A rear cover, the rear cover being disposed in the installation cavity and in interference fit with the housing, the mating surface between the rear cover and the housing being located inside the first step surface of the first step. Outside the first step surface, the outer peripheral wall of the rear cover is spaced from the inner wall of the installation cavity and defines a sealed space with an open end, and a sealing member is disposed in the sealed space; A mounting plate, the mounting plate being in cooperation with the outer end face of the rear cover and closing the open end.

2. The motor housing assembly according to claim 1, wherein, A first connecting portion is provided on the rear cover, and a first mating portion is provided on the mounting plate, and the first connecting portion is in mating connection with the first mating portion.

3. The motor housing assembly according to claim 2, characterized in that, The first connecting portion includes a first connecting hole, the mating portion includes a first mating hole, and the rear cover and the mounting plate are connected by a first fastening member, and the first fastening member passes through the first connecting hole and the first mating hole.

4. The motor housing assembly according to claim 1, characterized in that, The outer end face of the rear cover is flush with the outer end face of the housing, the mounting plate is in cooperation with both the outer end face of the rear cover and the outer end face of the housing, a second connecting hole is provided on the housing, a second mating hole is provided on the mounting plate, and the housing and the mounting plate are connected by a second fastening member, and the second fastening member passes through the second connecting hole and the second mating hole.

5. The motor housing assembly according to claim 1, wherein, Further comprising: a limiting member, the outer end face of the mounting plate is flush with the outer end face of the housing, the limiting member is connected to the housing, and the limiting member is in limiting cooperation with the outer end face of the mounting plate.

6. The motor housing assembly according to claim 1, characterized in that, A second step with a gradually decreasing diameter towards the side close to the opening is formed on the outer peripheral wall of the rear cover, the second step surface of the second step is flush with the first step surface, and the sealing member is in cooperation with both the first step surface and the second step surface.

7. The motor housing assembly according to any one of claims 1-6, characterized in that, The sealing member includes: sealant and / or sealing ring.

8. The motor housing assembly according to any one of claims 1-6, characterized in that At least a part of the outer end face of the housing and / or the rear cover close to the mating surface is inclined in a direction away from the opening in the direction close to the mating surface, forming a guiding surface.

9. A motor, characterized in that, Including the motor housing assembly according to any one of claims 1-8.

10. The motor according to claim 9, characterized in that, Further comprising: a bearing, a resolver stator assembly and a cooling fan, the bearing and the resolver stator assembly being supported on the rear cover, and the cooling fan being disposed on the mounting plate.

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