Brushless motor end cover sealing structure and motor

Abstract

The utility model relates to the technical field of motors, in particular to a brushless motor end cover sealing structure and a motor, the brushless motor end cover sealing structure comprises a motor shell, a base, an end cover and a sealing element, the base is rotatably connected with the motor shell, the end cover comprises an outer diameter connecting part and an inner diameter connecting part, the outer diameter connecting part is connected with the motor shell, and the inner diameter connecting part is connected with the motor shell. The inner diameter connecting part is provided with a first sealing connecting part, the base is provided with a second sealing connecting part, the first sealing connecting part is opposite to the second sealing connecting part to form a sealing groove, and the sealing piece is installed in the sealing groove. According to the utility model, the problem of insufficient sealing performance of the existing motor structure is solved, the sealing element is used for sealing, and the sealing performance and reliability of the structure are ensured. While the sealing performance is ensured, the rotation of the end cover along with the motor shell is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a brushless motor end cover sealing structure and a motor. Background Art

[0002] Brushless Motor is a type of motor, also known as brushless DC motor or electronic speed control motor. Compared with traditional brushed DC motor, brushless motor does not need brushes and collector rings for commutation, so it has higher efficiency, longer life and lower maintenance requirements. The working principle of brushless motor is to use electronic controller to realize timely switching of current to drive the motor rotor to rotate. It usually consists of stator and rotor. The stator contains several coils, which generate a rotating magnetic field by switching current. Permanent magnets or magnets are installed on the rotor, which rotate under the action of the rotating magnetic field.

[0003] When the existing motor is in use, there will be a gap between the motor end cover and the base, and some debris will easily enter the gap, causing damage or failure of the internal structure, so it is necessary to further improve the existing motor. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a brushless motor end cover sealing structure and a motor that solves the problem of insufficient sealing of the existing motor structure, adopts a sealing member for sealing, and ensures the sealing and reliability of the structure. While ensuring the sealing, the end cover does not affect the rotation of the motor housing.

[0005] The technical solution adopted by the utility model is: a brushless motor end cover sealing structure, including a motor housing, a base, an end cover and a sealing member; the base is rotatably connected to the motor housing; the end cover includes an outer diameter connecting portion and an inner diameter connecting portion, and the outer diameter connecting portion is connected to the motor housing; the inner diameter connecting portion is provided with a first sealing connecting portion, and the base is provided with a second sealing connecting portion, and the first sealing connecting portion is opposite to the second sealing connecting portion to form a sealing groove; the sealing member is installed in the sealing groove, the sealing member is elastic and deformable, and is used to seal between the first sealing connecting portion and the second sealing connecting portion.

[0006] A further improvement to the above solution is that the sealing member includes a sealing outer lip and a sealing inner lip, one side of the sealing outer lip is in sealing contact with the first sealing connection portion, and the sealing inner lip is in sealing contact with the second sealing connection portion.

[0007] A further improvement to the above solution is that a mounting cavity is provided in the sealing outer lip, and a sealing frame is provided in the mounting cavity.

[0008] A further improvement to the above solution is that an air pressure cavity is arranged inside the sealing outer lip, and the air pressure cavity is arranged in an annular shape.

[0009] A further improvement to the above solution is that the sealing member has an expansion groove, and the expansion groove is located between the sealing outer lip and the sealing inner lip; the sealing inner lip is inclined toward the second sealing connection portion.

[0010] A further improvement to the above scheme is that a yoke portion is provided on the outer periphery of the motor housing, a connecting platform is provided on the top of the yoke portion, a connecting ring is provided on the outer diameter connecting portion, and the inner diameter of the connecting platform fits the outer diameter of the connecting ring.

[0011] A further improvement to the above solution is that after the connecting platform is connected to the connecting ring, a placement cavity is formed in the motor housing, and the sealing member is arranged in the sealing groove to seal the placement cavity.

[0012] A further improvement to the above solution is that the first sealing connection portion includes a sealing ring provided on the end cover and protruding outward, and a sealing positioning step provided on the inner diameter of the sealing ring, wherein the sealing positioning step faces the second sealing connection portion.

[0013] A further improvement to the above solution is that the second sealing connection portion includes a sealing abutment platform, and the sealing abutment platform is opposite to the sealing positioning step to form a sealing groove.

[0014] A motor comprises the brushless motor end cover sealing structure.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the existing motor end cover, the utility model sets a seal between the end cover and the base. Specifically, a first sealing connection part is set at the inner diameter connection part of the end cover, and a second sealing connection part is set at the base to form a sealing groove. The seal is installed in the sealing groove to form a seal between the base and the end cover, thereby protecting the structure inside the motor housing and preventing external debris from entering the interior. The problem of insufficient sealing of the existing motor structure is solved, and a seal is used for sealing to ensure the sealing and reliability of the structure. While ensuring the sealing, it does not affect the rotation of the end cover following the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the sealing structure of the end cover of the brushless motor of the utility model;

[0018] Figure 2 for Figure 1 A top view of the sealing structure of the brushless motor end cover;

[0019] Figure 3 for Figure 2Sectional view of AA in the middle;

[0020] Figure 4 for Figure 3 A is an enlarged schematic diagram;

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the seal in the brushless motor end cover sealing structure.

[0022] Explanation of the accompanying drawings: motor housing 1, yoke part 11, connecting platform 12, placement cavity 121, base 2, second sealing connecting part 21, sealing abutment platform 211, shaft assembly 22, mounting platform 23, end cover 3, outer diameter connecting part 31, connecting ring 311, inner diameter connecting part 32, first sealing connecting part 33, sealing ring 331, sealing positioning step 332, seal 4, sealing outer lip 41, sealing frame 411, sealing inner lip 42, expansion groove 421, air pressure cavity 43. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] like Figure 1 to Figure 5As shown, in one embodiment of the utility model, a brushless motor end cover sealing structure is involved, including a motor housing 1, a base 2, an end cover 3 and a seal 4, the base 2 is rotatably connected to the motor housing 1, the end cover 3 includes an outer diameter connection part 31 and an inner diameter connection part 32, the outer diameter connection part 31 is connected to the motor housing 1, the inner diameter connection part 32 is provided with a first sealing connection part 33, the base 2 is provided with a second sealing connection part 21, the first sealing connection part 33 is opposite to the second sealing connection part 21 to form a sealing groove, and the seal 4 is installed in the sealing groove. In this embodiment, a seal 4 is provided between the end cover 3 and the base 2, specifically, a first sealing connection part 33 is provided on the inner diameter connection part 32 of the end cover 3, the base 2 is provided with a second sealing connection part 21, a sealing groove is formed between the first sealing connection part 33 and the second sealing connection part 21, and the seal 4 is installed in the sealing groove to form a seal between the base 2 and the end cover 3, thereby protecting the structure inside the motor housing 1 and preventing external debris from entering the interior. The problem of insufficient sealing of the existing motor structure is solved, and the sealing member 4 is used for sealing to ensure the sealing and reliability of the structure. While ensuring the sealing, the end cover 3 is not affected to rotate with the motor housing 1.

[0027] In the above embodiment, a sealing groove is formed by connecting the outer diameter connection part 31 with the motor housing 1 and the first sealing connection part 33 on the inner diameter connection part 32 with the second sealing connection part 21 on the base 2, and a sealing member 4 is installed therein. This design can effectively prevent liquid, dust and other impurities from entering the interior of the motor, and achieves efficient sealing performance.

[0028] In the above embodiments, the internal components of the brushless motor can be effectively protected from erosion and damage by the external environment, and the influence of fine particles, moisture, etc. on the motor can be prevented, thereby improving the reliability and stability of the motor.

[0029] In the above embodiment, the seal 4 in the sealing groove can effectively reduce the friction and wear of the internal and external environments, extend the service life of the motor, and reduce the maintenance and replacement costs.

[0030] In the above embodiment, the connection between the outer diameter connection part 31 and the motor housing 1 and the docking between the first sealing connection part 33 on the inner diameter connection part 32 and the second sealing connection part 21 on the base 2 can achieve precise positioning and alignment, ensure the accurate position of the end cover 3, and improve the efficiency and accuracy of assembly.

[0031] A yoke portion 11 is disposed on the outer periphery of the motor housing 1, a connecting platform 12 is disposed on the top of the yoke portion 11, a connecting ring 311 is disposed on the outer diameter connecting portion 31, and the inner diameter of the connecting platform 12 is fitted with the outer diameter of the connecting ring 311. In this embodiment, the connection ring 311 and the connecting platform 12 cooperate to provide sealing protection for the inside of the motor, further ensuring the sealing of the motor structure.

[0032] After the connection platform 12 is connected to the connection ring 311, a placement cavity 121 is formed in the motor housing 1, and the seal 4 is arranged in the sealing groove to seal the placement cavity 121. In this embodiment, the placement cavity 121 is used to install components inside the motor, such as the stator and rotor. Under the combination of the seal 4 and the sealing groove, the placement cavity 121 is sealed to ensure the sealing protection of the stator, rotor and other structures.

[0033] The base 2 is provided with a rotating shaft assembly 22, and the base 2 is rotatably connected to the motor housing 1 through the rotating shaft assembly 22. In this embodiment, the rotating shaft assembly 22 includes a rotating shaft and a bearing, and the rotating shaft is rotatably installed in the base 2 through the bearing, and one end of the rotating shaft is fixedly connected to the motor housing 1, so that the motor housing 1 can rotate under the action of the rotating shaft to form an outer rotor motor.

[0034] The base 2 is provided with a mounting platform 23 on one side of the second sealing connection portion 21, and the mounting platform 23 is provided with a mounting hole 231. In this embodiment, the mounting platform 23 is used to connect a fixed structure, such as a joint part of a robot or a fixed structure of a smart home, and then the joint structure or tire is put on the motor housing 1, and it can be used as a driving component.

[0035] The first sealing connection part 33 includes a sealing ring 331 which is arranged on the end cover 3 and protrudes outward, and a sealing positioning step 332 which is arranged on the inner diameter of the sealing ring 331, and the sealing positioning step 332 faces the second sealing connection part 21. Specifically, the second sealing connection part 21 includes a sealing abutment platform 211, and the sealing abutment platform 211 is opposite to the sealing positioning step 332 to form a sealing groove. In this embodiment, the sealing ring 331 and the sealing positioning step 332 in the first sealing connection part 33 form a sealing groove with the sealing abutment platform 211 in the second sealing connection part 21. This design can effectively prevent liquid, dust and other impurities from entering the interior of the motor, achieve efficient sealing performance, and protect the internal components of the motor from pollution and damage. The sealing positioning step 332 of the first sealing connection part 33 and the sealing abutment platform 211 of the second sealing connection part 21 are arranged relative to each other, achieving precise positioning and alignment. Such a design ensures the accurate position and connection of the end cover 3, and improves the efficiency and accuracy of assembly. The design of the sealing positioning step 332 and the sealing abutment platform 211 can provide a good sealing effect and have a certain pressure resistance. When the motor is running, due to the difference in internal and external pressures, the sealing part of the end cover 3 may be subjected to a certain pressure. This structure can effectively resist the pressure and ensure the reliability of the seal.

[0036] The seal 4 includes a sealing outer lip 41 and a sealing inner lip 42, one side of the sealing outer lip 41 is in sealing contact with the first sealing connection part 33, and the sealing inner lip 42 is in sealing contact with the second sealing connection part 21. In this embodiment, double sealing protection is achieved by the sealing contact between the sealing outer lip 41 and the first sealing connection part 33, and the sealing inner lip 42 and the second sealing connection part 21. This design can prevent liquid, gas and impurities from entering the interior of the motor from two different directions, providing more reliable sealing performance. Due to the sealing contact between the sealing outer lip 41 and the sealing inner lip 42 and the first sealing connection part 33 and the second sealing connection part 21, the penetration of liquid, gas and other media can be effectively prevented, ensuring the sealing inside the motor.

[0037] A telescopic groove 421 is provided on one side of the sealing inner lip 42, and the sealing inner lip 42 is inclined toward the second sealing connection portion 21. In this embodiment, by providing the telescopic groove 421 on one side of the sealing inner lip 42, the flexibility and scalability of the sealing inner lip 42 can be increased. The telescopic groove 421 can allow the sealing inner lip 42 to undergo a certain degree of telescopic deformation when subjected to external pressure or thermal expansion and other factors to adapt to different working environments and conditions. The sealing inner lip 42 is inclined toward the second sealing connection portion 21, and this inclined design can increase the fit between the sealing inner lip 42 and the second sealing connection portion 21. When the two are sealed and abutted, the inclined design can increase the contact area, improve the sealing effect, and reduce the possibility of leakage.

[0038] The seal 4 is provided with an air pressure chamber 43, which can increase the contact force between the sealing outer lip 41 and the first sealing connection part 33. By applying appropriate air pressure in the air pressure chamber 43, the sealing outer lip 41 and the sealing connection part can be more closely fitted, thereby improving the sealing effect and preventing leakage. The double sealing design and the use of the air pressure chamber 43 improve the fit and sealing performance between the seal 4 and the sealing connection part, and increase the reliability of the overall seal.

[0039] The sealing outer lip 41 is provided with an installation cavity, and the installation cavity is provided with a sealing frame 411. In this embodiment, the sealing frame 411 plays a role in strengthening and shaping the structure of the sealing member. The sealing frame 411 adopts a structural member with high hardness, which can be a metal member or a structural member with similar strength.

[0040] A motor includes the brushless motor end cover 3 sealing structure. A stator and a rotor are arranged inside the motor housing 1, the stator is inside the base 2, and the rotor is on the inner wall of the motor housing 1, so that the stator and the rotor are combined to form a motor drive function.

[0041] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A brushless motor end cover sealing structure, characterized in that: It includes a motor housing, a base, an end cover and a seal; the base is rotatably connected to the motor housing; the end cover includes an outer diameter connection part and an inner diameter connection part, the outer diameter connection part is connected to the motor housing; the inner diameter connection part is provided with a first sealing connection part, the base is provided with a second sealing connection part, the first sealing connection part is opposite to the second sealing connection part to form a sealing groove; the seal is installed in the sealing groove, the seal is elastic and deformable, and is used to seal between the first sealing connection part and the second sealing connection part.

2. The brushless motor end cover sealing structure according to claim 1, characterized in that: The sealing member comprises a sealing outer lip and a sealing inner lip, one side of the sealing outer lip is in sealing contact with the first sealing connection portion, and the sealing inner lip is in sealing contact with the second sealing connection portion.

3. The brushless motor end cover sealing structure according to claim 2, characterized in that: A mounting cavity is arranged in the sealing outer lip, and a sealing frame is arranged in the mounting cavity.

4. The brushless motor end cover sealing structure according to claim 2, characterized in that: An air pressure cavity is arranged in the sealing outer lip, and the air pressure cavity is arranged in an annular shape.

5. The brushless motor end cover sealing structure according to claim 2, characterized in that: The sealing member expansion groove is located between the sealing outer lip and the sealing inner lip; the sealing inner lip is inclined toward the second sealing connection portion.

6. The brushless motor end cover sealing structure according to claim 1, characterized in that: A yoke portion is disposed on the outer periphery of the motor housing, a connecting platform is disposed on the top of the yoke portion, a connecting ring is disposed on the outer diameter connecting portion, and the inner diameter of the connecting platform is fitted with the outer diameter of the connecting ring.

7. The brushless motor end cover sealing structure according to claim 6, characterized in that: After the connecting platform is connected to the connecting ring, a placement cavity is formed in the motor housing, and the sealing member is arranged in the sealing groove to seal the placement cavity.

8. The brushless motor end cover sealing structure according to claim 1, characterized in that: The first sealing connection portion comprises a sealing ring which is arranged on the end cover and protrudes outwards, and a sealing positioning step which is arranged on the inner diameter of the sealing ring, and the sealing positioning step faces the second sealing connection portion.

9. The brushless motor end cover sealing structure according to claim 8, characterized in that: The second sealing connection portion includes a sealing abutment platform, and the sealing abutment platform is opposite to the sealing positioning step to form a sealing groove.

10. A motor, characterized in that: The invention comprises the brushless motor end cover sealing structure as claimed in any one of claims 1 to 9.

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