Motor sealing structure and motor

Abstract

The utility model discloses a motor sealing structure and a motor in the technical field of motor sealing, and aims to solve the problems of insufficient sealing performance between an output rotating shaft and an end cover of a conventional motor, short service life of a rubber sealing ring and poor heat dissipation of the motor. The motor sealing structure comprises a front end cover, a shaft rod and a sealing assembly, wherein the shaft rod is connected with the front end cover through a bearing; the sealing assembly is composed of an installation ring, a rubber sealing ring, a sealing soft piece, a spring and a heat conduction rod, the rubber sealing ring is arranged in the installation ring, the rubber sealing ring is tightly attached to the shaft rod through the spring, the sealing performance is improved, and the service life is prolonged; the design of the heat conduction rod enhances the heat dissipation effect of the motor and prevents the motor from being overheated. Through the sealing structure, the motor effectively prevents dust and moisture from invading, reduces maintenance requirements, protects the main shaft of the motor, adapts to severe environments, can effectively conduct heat generated inside the motor to the outside, enhances heat dissipation effect, and has high practical value.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor sealing technical field, concretely is a motor sealing structure and motor. BACKGROUND

[0002] In the motor technical field, especially in the motor used in outdoor or severe environment, such as the bus main drive motor, the protection grade requirement is higher to ensure that the motor can run stably for a long time. According to the national standard, the protection grade of this kind of motor usually needs to reach IP67 or more to cope with severe outdoor conditions.

[0003] However, the output rotating shaft and end cover of the existing motor are generally connected through a bearing to ensure the stable rotation of the rotating shaft, but this structure lacks sealing, which can easily lead to dust entering and affect the service life of the motor. In order to solve this problem, a rubber sealing ring is usually added for sealing. However, the rubber sealing ring has a short service life and will soon be worn out, resulting in a gap between the sealing ring and the rotating shaft, affecting the sealing effect and being unable to guarantee the effective heat dissipation of the motor. In addition, the sealing element of the existing motor sealing structure is easily affected by the environment, the service life of the sealing element is shortened, and the motor main shaft is easily worn out, so the motor needs to be maintained frequently and cannot meet the use requirements. In addition, if the front end bearing of the motor is not properly protected, the bearing is easily damaged, which can further cause motor failure.

[0004] In view of the above problems, the present application provides a motor sealing structure and a motor. SUMMARY

[0005] The utility model discloses the purpose at: for solving the problem raised in the background art, the utility model provides a motor sealing structure and motor.

[0006] The utility model discloses the following technical scheme in order to realize the above-mentioned purpose specifically adopts:

[0007] A motor sealing structure, comprising a front end cover, a shaft rod and a sealing assembly, wherein:

[0008] The inner wall of one end of the through hole of the front end cover is fixed with a bearing;

[0009] The shaft rod penetrates the through hole and is fixed on the inner wall of the bearing;

[0010] The sealing assembly comprises a mounting ring inserted on the other end of the through hole, the outer diameter of the mounting ring is the same as the inner diameter of the through hole, one end of the mounting ring is fixed with a connecting plate, the connecting plate is fixed with one side of the front end cover through screws, a rubber sealing ring is movably arranged in the mounting ring, the inner diameter of the rubber sealing ring is the same as the diameter of the shaft rod, a sealing soft film is connected between the inner walls of the two ends of the mounting ring and the outer walls of the two ends of the rubber sealing ring, and a plurality of uniformly distributed springs are connected between the outer circumferential side of the rubber sealing ring and the inner circumferential side of the mounting ring.

[0011] Further, a plurality of threaded grooves are arranged in an array on the outer circumferential side of the mounting ring, the number of the threaded grooves is the same as and one-to-one corresponds to the number of the springs, the diameter of the threaded grooves is greater than the diameter of the springs, the springs are movably inserted in the corresponding threaded grooves, the threaded grooves are threadedly provided with limiting blocks, and the two ends of the springs are respectively in contact with the limiting blocks and the outer side wall of the rubber sealing ring.

[0012] Further, a cross-shaped insertion groove is formed on the end of the limiting block away from the spring.

[0013] Further, a plurality of limiting columns I are formed on the outer side wall of the rubber sealing ring, a plurality of the limiting columns I one-to-one correspond to a plurality of the springs, and one end of the spring is sleeved on the outside of the corresponding limiting column I.

[0014] Further, a limiting column II is formed on the end of the limiting block away from the cross-shaped insertion groove, and the other end of the spring is sleeved on the limiting column II.

[0015] Further, one end of the same side of a plurality of the heat-conducting rods is connected with an integral heat-conducting ring, and the other end of a plurality of the heat-conducting rods is connected with an integral heat-dissipating ring.

[0016] Further, a plurality of uniformly distributed heat-dissipating wing plates are formed on the side of the heat-dissipating ring away from the heat-conducting rods.

[0017] Further, a plurality of uniformly distributed oil infiltration holes are formed in the rubber sealing ring.

[0018] A motor comprises a shell, a stator, a rotor and the motor sealing structure, the front end cover in the motor sealing structure is connected with the shell

[0019] Compared with the prior art, the motor sealing structure has the advantages that:

[0020] This solution involves setting a rubber sealing ring in the sealing assembly and connecting several evenly distributed springs between the outer circumference of the rubber sealing ring and the inner circumference of the mounting ring. By utilizing the elasticity of the springs, the inner wall of the rubber sealing ring can tightly fit the rotating shaft, effectively preventing the intrusion of dust and moisture and improving the sealing performance of the motor.

[0021] This solution involves inserting several evenly distributed heat-conducting rods through both ends of the mounting ring. One end of each heat-conducting rod is connected to an integral heat-conducting ring, and the other end is connected to an integral heat-dissipating ring. The side of the heat-dissipating ring opposite to the heat-conducting rods has several evenly distributed heat-dissipating fins. This structural design can effectively conduct the heat generated inside the motor to the outside, enhance the heat dissipation effect, and prevent the motor from overheating.

[0022] This solution utilizes several evenly distributed oil seepage holes constructed through the rubber sealing ring to lubricate the shaft, reduce friction, protect the shaft, and extend the service life of the motor.

[0023] The motor sealing structure design of this solution takes into account the usage requirements in harsh environments. By improving sealing performance and heat dissipation, the motor can operate stably under harsh conditions such as dust and mud, thus enhancing the motor's environmental adaptability. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the motor sealing structure in this utility model;

[0025] Figure 2 This utility model Figure 1 A three-dimensional sectional view;

[0026] Figure 3 This utility model Figure 2 An enlarged view of structure A in the middle;

[0027] Figure 4 This utility model Figure 1 A partial 3D structural diagram of another state;

[0028] Figure 5 This utility model Figure 1 A three-dimensional structural diagram of the central sealing assembly;

[0029] Figure 6 This utility model Figure 5 A three-dimensional sectional view;

[0030] Figure 7 This is a schematic diagram of the motor sealing structure and the three-dimensional structure of the motor according to the present invention.

[0031] In the figure: 1, front end cover; 11, through port; 12, bearing; 2, shaft rod; 3, sealing assembly; 31, mounting ring; 311, threaded groove; 312, limiting block; 313, cross-shaped slot; 314, limiting column two; 32, connecting plate; 33, screw; 34, rubber sealing ring; 341, limiting column one; 342, oil seepage hole; 35, sealing soft film; 36, spring; 37, heat conduction rod; 371, heat conduction ring; 372, heat dissipation ring; 373, heat dissipation wing plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0033] The application provides a motor sealing structure and a motor, which are mainly used to solve the problem that the output rotating shaft and the end cover of the existing motor are generally connected through a bearing to ensure stable rotation of the rotating shaft, but such a structure lacks sealing performance and is easy to cause dust to enter, affecting the service life of the motor. In order to solve this problem, a rubber sealing ring is usually added for sealing. However, the rubber sealing ring has a short service life and is quickly worn out, resulting in a gap between the sealing ring and the rotating shaft, affecting the sealing effect and being unable to ensure effective heat dissipation of the motor. In addition, the sealing element of the existing motor sealing structure is easy to be affected by the environment, the service life of the sealing element is shortened, and the motor main shaft is easy to wear out. Therefore, the motor needs to be frequently maintained, which cannot meet the use requirement. In addition, if the front end bearing of the motor is not properly protected, the bearing is easy to be damaged, thereby causing the motor to malfunction. The application provides the following technical scheme, and the following will be described in detail in combination with Figures 1-7 Detailed description: Embodiment one

[0034] In one specific embodiment of the utility model, a motor sealing structure is described, which is finely designed to improve the sealing performance and heat dissipation efficiency of the motor, prolong the service life of key components, and mainly comprises a front end cover 1, a shaft rod 2 and a sealing assembly 3, wherein:

[0035] A through port 11 is formed in the middle of the front end cover 1, the through port 11 penetrates from one side of the front end cover 1 to the other side, an inner wall at one end of the through port 11 is fixed with a bearing 12 for supporting and reducing friction of the shaft rod 2 in the rotating process, the shaft rod 2 penetrates through the through port 11 and is fixed on the inner wall of the bearing 12 to ensure stable rotation of the shaft rod 2;

[0036] The sealing assembly 3 is carefully designed to ensure the sealing performance and heat dissipation efficiency of the motor, and the sealing assembly 3 comprises a mounting ring 31 inserted into the other end of the through hole 11, the outer diameter of the mounting ring 31 matches the inner diameter of the through hole 11, so that the mounting ring 31 is tightly matched with the front end cover 1, and one end of the mounting ring 31 is fixedly connected with a connecting plate 32, and the connecting plate 32 is fixedly connected with one side of the front end cover 1 through a screw 33, so that a stable connection is formed;

[0037] The inner part of the mounting ring 31 is movably provided with a rubber sealing ring 34, the inner diameter of the rubber sealing ring 34 is the same as the diameter of the shaft 2, so that the sealing effect is achieved, the inner walls of the two ends of the mounting ring 31 are connected with the outer walls of the two ends of the rubber sealing ring 34 through a sealing soft film 35, and the sealing effect is further enhanced, and the outer circumferential side of the rubber sealing ring 34 is connected with the inner circumferential side of the mounting ring 31 through a plurality of uniformly distributed springs 36, the springs 36 provide necessary elastic force, so that the rubber sealing ring 34 can be tightly matched with the shaft 2, thereby improving the sealing performance and prolonging the service life of the rubber sealing ring 34;

[0038] In addition, a plurality of uniformly distributed heat conducting rods 37 are inserted through the two ends of the mounting ring 31, and the design of the heat conducting rods 37 helps to conduct the heat generated in the motor to the outside, thereby improving the heat dissipation efficiency of the motor and avoiding the performance degradation or damage of the motor due to overheating.

[0039] Through the design, the motor sealing structure of the utility model not only improves the sealing performance of the motor and prevents the invasion of dust and moisture, but also enhances the heat dissipation effect of the motor through the design of the heat conducting rods 37, reduces the maintenance requirement of the motor, protects the shaft 2, enables the motor to stably operate in a harsh environment, and significantly improves the reliability and service life of the motor.

[0040] In the specific embodiment of the utility model, the structure design of the mounting ring 31 is further refined to enhance the stability and durability of the motor sealing structure, and specifically, please refer to Figure 3 and Figure 6 A plurality of threaded grooves 311 arranged in an array are formed through the outer circumferential side of the mounting ring 31, the number of the threaded grooves 311 is the same as and corresponds to the number of the springs 36, and the diameter of the threaded grooves 311 is greater than the diameter of the springs 36, so that the springs 36 can be flexibly inserted into the threaded grooves 311, thereby providing appropriate elastic space during installation and operation;

[0041] The inner thread of the thread groove 311 is inserted with a limiting block 312, and the two ends of the spring 36 respectively abut against the limiting block 312 and the outer side wall of the rubber sealing ring 34, which ensures the stability of the spring 36 during compression and expansion, prevents the spring 36 from moving or falling off inside the thread groove 311, and also ensures that the spring 36 can uniformly apply pressure to the rubber sealing ring 34, maintain the sealing effect between the rubber sealing ring 34 and the shaft 2, and simplify the installation process;

[0042] Through this fine design, the mounting ring 31 not only can stably fix the spring 36, but also can ensure that the spring 36 maintains its elastic function in long-term operation, thereby prolonging the service life of the rubber sealing ring 34 and improving the reliability of the entire motor sealing structure. The design of this structure takes into account the stability and durability of the motor under various working conditions, so that the motor can maintain high-efficiency and stable operation in harsh environments.

[0043] A cross-shaped insertion slot 313 is formed on the end of the limiting block 312 away from the spring 36, which provides a clear guide for the relevant installation tools or components to accurately engage with the limiting block 312. This design not only simplifies the installation process, reduces the installation time, but also improves the installation accuracy, ensures the correct position of the limiting block 312 in the mounting ring 31. The existence of the cross-shaped insertion slot 313 also makes the limiting block 312 more stable when bearing the thrust of the spring 36, reducing the potential failure risk caused by the vibration or displacement of the spring 36.

[0044] In the specific embodiments of the present application, the cooperation structure of the rubber sealing ring 34 and the spring 36 is further optimized to ensure the stability and long-term reliability of the motor sealing structure. Specifically, please refer to Figure 3 and Figure 6 A plurality of limiting columns one 341 are formed on the outer side wall of the rubber sealing ring 34, and the plurality of limiting columns one 341 correspond one-to-one with the plurality of springs 36, ensuring that each spring 36 can be accurately positioned and fixed. One end of the spring 36 is sleeved outside the corresponding limiting column one 341. This structure not only provides a fixed point for the spring 36, but also limits the movement of the spring 36 in the radial direction, preventing the spring 36 from moving or falling off during operation;

[0045] Further, the end of the limiting block 312 away from the cross-shaped slot 313 is configured with a limiting post two 314, the other end of the spring 36 is sleeved on the limiting post two 314, the limiting post two 314 is also designed to fix and limit the spring 36, and cooperates with the limiting post one 341 to form a bidirectional limiting structure of the spring 36, so that the stability of the spring 36 in compression and stretching is ensured, displacement of the spring 36 in the mounting ring 31 is prevented, and the spring 36 can uniformly apply pressure to the rubber sealing ring 34, so that the sealing effect between the spring 36 and the shaft rod 2 is maintained.

[0046] In the specific embodiment of the utility model, the structure of the heat conduction rod 37 is innovatively designed to optimize the heat dissipation performance of the motor, and specifically, please refer to Figure 2 、 Figure 4 、 Figure 5 and Figure 6 , one end of the same side of the plurality of heat conduction rods 37 is connected with an integrated heat conduction ring 371, this design enables the heat conduction rod 37 to effectively conduct the heat generated inside the motor to the heat conduction ring 371, thereby realizing rapid heat transfer, and the heat conduction ring 371 as a centralized heat exchange area helps to improve the heat conduction efficiency, so that the heat inside the motor can be more uniformly and quickly conducted to the external environment;

[0047] the other end of the plurality of heat conduction rods 37 is connected with an integrated heat dissipation ring 372, the heat dissipation ring 372 as a connecting point of the other end of the heat conduction rod 37 not only plays a fixing role in structure, but also increases the heat dissipation area;

[0048] the side of the heat dissipation ring 372 away from the heat conduction rod 37 is configured with a plurality of uniformly distributed heat dissipation wing plates 373, the design of these heat dissipation wing plates 373 increases the contact area of the heat dissipation ring 372 with the external environment, improves the heat dissipation efficiency, and the uniform distribution of the heat dissipation wing plates 373 ensures that the heat can be uniformly dispersed from the heat dissipation ring 372 to the surrounding environment, avoiding the problem of local overheating;

[0049] Through this design, the heat conduction rod 37 can not only effectively conduct the heat generated inside the motor to the outside, but also the structure of the heat dissipation ring 372 and the heat dissipation wing plate 373 can improve the heat dissipation efficiency, so that the motor can still maintain good heat dissipation performance under the condition of long-time operation or high-load work, avoiding performance degradation or damage due to overheating.

[0050] Furthermore, in the specific embodiment, the lubrication system of the motor sealing structure is further optimized to reduce friction and prolong the service life of the key components, please refer to Figure 5 and Figure 6A plurality of evenly distributed oil permeation holes 342 are formed through the rubber sealing ring 34, and the design of the oil permeation holes 342 allows the lubricating oil to be evenly distributed during the operation of the motor, thereby effectively lubricating the contact surface between the rubber sealing ring 34 and the shaft 2.

[0051] Through the threaded groove 311, lubricating oil can be poured in advance between the installation ring 31, the rubber sealing ring 34 and the two sealing soft films 35 during installation, and this pre-lubrication measure ensures that a layer of lubricating oil film is formed between the rubber sealing ring 34 and the shaft 2 at the initial stage of motor start, reducing friction and wear during start-up.

[0052] When the shaft 2 rotates, the lubricating oil enters between the rubber sealing ring 34 and the shaft 2 through the oil permeation holes 342 due to the centrifugal force and pressure difference, forming a stable oil film for continuous lubrication. This design not only reduces the friction between the rubber sealing ring 34 and the shaft 2, but also reduces wear, and helps to dissipate heat and prevent overheating due to long-term operation.

[0053] Through this delicate design, the rubber sealing ring 34 not only provides good sealing effect, but also realizes effective self-lubrication, reducing the dependence on external lubrication system and simplifying the maintenance work of the motor. This structure design reflects that the application not only improves the sealing performance of the motor, but also pays attention to reducing friction and wear, improving the operating efficiency and reliability of the motor, so that the motor can maintain high efficiency and stable operation under various working conditions. Embodiment two:

[0054] In another specific embodiment of the present application, a motor integrated with the aforementioned motor sealing structure is described, specifically referring to Figure 7 A motor includes a housing, a stator, a rotor and a motor sealing structure. The front end cover 1 in the motor sealing structure is connected with the housing, forming the front end part of the motor, ensuring the overall sealing performance and structural stability of the motor.

[0055] The following are the installation and use steps of the motor sealing structure:

[0056] First, the bearing 12 is fixed on the inner wall of one end of the through hole 11, which is used to support the shaft 2 and reduce the friction during rotation. The shaft 2 is inserted through the through hole 11 and fixed on the inner wall of the bearing 12 to ensure stable rotation of the shaft 2.

[0057] Then, the installation ring 31 is inserted into the other end of the through hole 11, and the outer diameter of the installation ring 31 matches the inner diameter of the through hole 11, ensuring the close fit between the installation ring 31 and the front end cover 1. One end of the installation ring 31 is fixed with a connecting plate 32, which is fixed with one side of the front end cover 1 through a screw 33, forming a stable connection.

[0058] The spring 36 can ensure that the rubber sealing ring 34 is tightly attached to the shaft 2, and the heat conducting rod 37 conducts the heat generated inside the motor to the outside, improving the heat dissipation efficiency of the motor;

[0059] Through the threaded groove 311, lubricating oil can be poured in advance between the installation ring 31, the rubber sealing ring 34 and the two sealing soft films 35 during installation, ensuring that a layer of lubricating oil film is formed between the rubber sealing ring 34 and the shaft 2 at the initial stage of motor starting, reducing friction and wear during starting;

[0060] When the shaft 2 rotates, the lubricating oil enters between the rubber sealing ring 34 and the shaft 2 through the oil infiltration hole 342, forming a stable oil film, continuously lubricating, reducing friction and wear, and helping to dissipate heat.

[0061] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A motor seal structure comprising a front end cover (1), a shaft (2) and a seal assembly (3), characterized in that, Wherein: The middle part of the front end cover (1) is provided with a through hole (11), and the inner wall of one end of the through hole (11) is fixedly provided with a bearing (12); The shaft rod (2) penetrates the through hole (11) and is fixed to the inner wall of the bearing (12); The sealing assembly (3) comprises a mounting ring (31) inserted into the other end of the through hole (11), the outer diameter of the mounting ring (31) is the same as the inner diameter of the through hole (11), one end of the mounting ring (31) is fixedly provided with a connecting plate (32), the connecting plate (32) is fixed to one side of the front end cover (1) through a screw (33), a rubber sealing ring (34) is movably arranged in the mounting ring (31), the inner diameter of the rubber sealing ring (34) is the same as the diameter of the shaft rod (2), the inner walls of the two ends of the mounting ring (31) and the outer walls of the two ends of the rubber sealing ring (34) are connected with a sealing soft film (35), the outer circumferential side of the rubber sealing ring (34) and the inner circumferential side of the mounting ring (31) are connected with a plurality of uniformly distributed springs (36), and a plurality of uniformly distributed heat conducting rods (37) are inserted into the two ends of the mounting ring (31).

2. A motor seal structure according to claim 1, wherein: A plurality of threaded grooves (311) are arranged in an array on the outer circumferential side of the mounting ring (31), the number of the threaded grooves (311) is the same as and corresponds to the number of the springs (36), the diameter of the threaded grooves (311) is greater than the diameter of the springs (36), the springs (36) are movably inserted into the corresponding threaded grooves (311), and a limiting block (312) is screw-inserted into the threaded groove (311).

3. A motor seal structure according to claim 2, wherein: A cross-shaped insertion groove (313) is arranged on one end of the limiting block (312) away from the spring (36).

4. A motor seal structure according to claim 3, wherein: A plurality of limiting columns (341) are arranged on the outer side wall of the rubber sealing ring (34), the plurality of limiting columns (341) correspond to the plurality of springs (36), and one end of the spring (36) is sleeved on the outside of the corresponding limiting column (341).

5. A motor seal structure according to claim 4, wherein: The other end of the spring (36) is sleeved on the limiting column (314) away from the cross-shaped insertion groove (313).

6. A motor seal as claimed in claim 1, wherein: One end of the same side of the plurality of heat conducting rods (37) is connected with an integral heat conducting ring (371), and the other end of the plurality of heat conducting rods (37) is connected with an integral heat dissipation ring (372).

7. A motor seal structure according to claim 6, wherein: A plurality of uniformly distributed heat dissipation wing plates (373) are arranged on the side of the heat dissipation ring (372) away from the heat conducting rod (37).

8. A motor seal as claimed in claim 1, wherein: A plurality of uniformly distributed oil infiltration holes (342) are arranged on the rubber sealing ring (34).

9. An electric machine characterized by The motor sealing structure comprises a shell, a stator, a rotor and the motor sealing structure of any one of claims 1-8, and the front end cover (1) of the motor sealing structure is connected with the shell.

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