A multi-layer sealed motor end cover structure

Abstract

This utility model relates to the field of motor end cover technology and discloses a multi-layer sealed motor end cover structure, including a rear end cover body, an outer bushing, and an inner bushing. A bearing and a sealing sleeve are fixedly installed on the inner edge of the outer bushing, and a groove 1 and a groove 2 are formed on the outer edge of the rear end cover body. This multi-layer sealed motor end cover structure, through the large-diameter design of the sealing ring extending beyond the outer edge of the extension sleeve, allows the sealing ring to cover the connection edge of the two components when the extension sleeve is mated with an adjacent component, preventing liquid and dust from entering from the edge gap. Furthermore, the rubber material has good elastic recovery, adapting to minor irregularities in the edge under pressure and filling tiny gaps. The mounting groove on the rear end cover body positions the sealing gasket, ensuring it covers the connection gap between the rear end cover and the motor housing, while preventing displacement of the sealing gasket during installation, thus achieving multiple seals and demonstrating strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of motor end cover technology, specifically a multi-layer sealed motor end cover structure. Background Technology

[0002] An electric motor is a core power device that converts electrical energy into mechanical energy based on the law of electromagnetic induction. It is widely used in industries, transportation, and home appliances. Its core components include a stator, a rotor, and supporting and protective parts. Among them, the rear end cover is a key component at the non-output end of the motor and its function is crucial. It fixes the rear end bearing through the internal bearing chamber, provides stable support for the rotor to ensure the coaxiality of the stator and rotor, and avoids operational failures. At the same time, it can be tightly connected to the housing to isolate external pollutants such as dust and moisture, protect the internal windings and rotor, and can also be used to fix the motor to external equipment through the mounting holes.

[0003] The motor end cap is a core component of the motor housing, covering both ends of the motor. The inner side is directly attached to core precision components such as bearings, windings, and rotors, while the outer side is exposed to the complex operating environment. Sealing it essentially creates a two-way protective barrier that prevents harmful external substances from entering the motor and also prevents the loss of critical internal media, ultimately ensuring the normal operation, reliability, and service life of the motor.

[0004] Chinese Utility Model Patent Publication No. CN222827060U discloses a multi-layer sealed vibratory motor end cover structure. The specification of this multi-layer sealed vibratory motor end cover structure reveals that, through the double-layer annular wall design of the protective cover, different materials can be selected for the inner and outer layers based on their usage conditions to achieve better protection. Furthermore, when either the inner or outer layer is worn or corroded individually, it can be replaced separately, reducing maintenance costs. It can also provide customized layered protection against dust, high temperatures, and corrosion. However, this multi-layer sealed vibratory motor end cover structure, relying solely on the double-layer annular wall design for sealing, is prone to gaps at the connection between the end cover and the motor, leading to leakage and affecting the normal operation of the motor, thus hindering its widespread adoption. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a multi-layer sealed motor end cover structure, which can effectively solve the problem in the prior art that only a double-layer ring wall design is used for sealing, which easily leads to gaps at the connection between the end cover and the motor, resulting in leakage and affecting the normal use of the motor, and is not convenient for widespread use.

[0006] The technical solution adopted by this utility model is: a multi-layer sealed motor end cover structure, including a rear end cover body, an outer bushing and an inner bushing. A bearing and a sealing sleeve I are fixedly installed on the inner edge of the outer bushing. A groove I and a groove II are opened on the outer edge of the rear end cover body. A sealing gasket is fixedly installed on the end of the rear end cover body near the groove II. An extension sleeve is fixedly installed on the end of the rear end cover body away from the outer bushing. A sealing sleeve III is fixedly installed on the inner edge of the extension sleeve.

[0007] Preferably, a limiting groove is formed at the inner edge of the outer bushing, and a first sealing sleeve and a second sealing sleeve are engaged at the inner edge of the limiting groove. The first sealing sleeve is made of nitrile rubber, and the second sealing sleeve is made of difluororubber.

[0008] Through the above technical solution, the contour of the limiting groove is adapted to the sealing sleeve one and sealing sleeve two. The radial and axial sliding of sealing sleeve one and sealing sleeve two is restricted by the snap-fit ​​structure, which avoids the sealing sleeve one and sealing sleeve two from being separated due to vibration. In addition, sealing sleeve one mainly prevents the bearing grease from leaking outward, while sealing sleeve two can further prevent external dust and moisture from entering the bearing through the gap between the outer shaft sleeve and the rotating shaft. The two work together to form a double protection against leakage and invasion.

[0009] Preferably, there are multiple identical limiting grooves, sealing sleeve one, and sealing sleeve two, and the multiple limiting grooves correspond one-to-one with sealing sleeve one and sealing sleeve two.

[0010] The above technical solution forms a multi-seal structure by having multiple limiting grooves corresponding one-to-one with sealing sleeve one and sealing sleeve two, which improves the overall sealing reliability. Even if a single seal fails, the remaining sealing sleeves can still maintain the protective effect, which is suitable for the long-term continuous operation of the motor.

[0011] Preferably, a fixing cover is fixedly installed at one end of the rear end cover body near the outer bushing, and a reinforcing sleeve is fixedly installed at one end of the rear end cover body near the inner bushing.

[0012] The above technical solution strengthens the connection between the outer bushing and the rear cover body by fixing the cover, and enhances the rigidity of the rear cover body near the inner bushing by reinforcing the cover, thus preventing the end cover from deforming and damaging the sealing gap. It provides stable structural support for the multi-layer sealing structure and is suitable for the high-speed and high-load operating conditions of the motor.

[0013] Preferably, the end of the rear cover body near the sealing gasket has a through-hole for installation groove, and the installation groove corresponds one-to-one with the sealing gasket.

[0014] The above technical solution allows the sealing gasket to be positioned by the mounting groove of the rear cover body, ensuring that the sealing gasket covers the connection gap between the rear cover and the motor housing, while preventing the sealing gasket from shifting during installation.

[0015] Preferably, a sealing ring is fixedly installed at the end of the rear cover body away from the outer bushing. The diameter of the sealing ring is larger than the diameter of the extension sleeve, and the sealing ring is a rubber sealing ring.

[0016] Through the above technical solution, the large diameter design of the sealing ring extends beyond the outer edge of the extension sleeve. When the extension sleeve is connected to an adjacent component, the sealing ring can cover the connection edge of the two, preventing liquid and dust from entering from the edge gap. In addition, the rubber material has good elastic recovery, which can adapt to the slight irregularities of the edge when under pressure, fill the small gaps, and the rubber's aging resistance and temperature resistance are adapted to the temperature changes during motor operation.

[0017] Preferably, there are four identical sealing sleeves, and the four sealing sleeves are distributed at equal intervals about the axis of the extension sleeve.

[0018] Through the above technical solution, the four equally spaced sealing sleeves on the inner edge of the extension sleeve form a uniform circumferential seal between the inner bushing and the extension sleeve, ensuring consistent sealing pressure around the inner bushing, avoiding leakage caused by excessive local gaps, and adapting to the rotation and vibration conditions of the inner bushing.

[0019] Compared with the prior art, the present invention provides a multi-layer sealed motor end cover structure, which has the following advantages:

[0020] 1. The multi-layer sealed motor end cover structure, through the design of sealing sleeve one and sealing sleeve two, can play a double sealing role when the end cover is connected to the bearing. Through multiple limiting grooves corresponding one-to-one with sealing sleeve one and sealing sleeve two, a multi-seal structure is formed, which improves the overall sealing reliability. Even if a single seal fails, the remaining sealing sleeves can still maintain the protective effect, which is suitable for the needs of long-term continuous operation of motor.

[0021] 2. This multi-layer sealed motor end cover structure, through the large diameter design of the sealing ring extending beyond the outer edge of the extension sleeve, allows the sealing ring to cover the connection edge of the two components when the extension sleeve is mated with the adjacent components, preventing liquid and dust from entering from the edge gap. Furthermore, the rubber material has good elastic recovery, adapting to minor irregularities of the edge under pressure and filling tiny gaps. The mounting groove of the rear end cover body can position the sealing gasket, allowing it to cover the connection gap between the rear end cover and the motor housing, while preventing the sealing gasket from shifting during installation, thus achieving multiple seals. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0025] Figure 4 This is a schematic diagram of the explosive structure of this utility model. Figure 2 ;

[0026] Figure 5 This is a schematic cross-sectional view of the present invention.

[0027] Figure 6 This is a schematic diagram of the disassembled structure of this utility model.

[0028] The components are: 1. rear end cover body; 2. fixed cover; 3. outer bushing; 4. bearing; 5. sealing sleeve one; 6. groove one; 7. groove two; 8. sealing gasket; 9. mounting groove; 10. inner bushing; 11. reinforcing sleeve; 12. sealing sleeve two; 13. sealing ring; 14. extension sleeve; 15. sealing sleeve three; 16. limiting groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1: As Figure 1-6 As shown, the present invention provides a multi-layer sealed motor end cover structure, including a rear end cover body 1, an outer bushing 3 and an inner bushing 10. A bearing 4 and a sealing sleeve 5 are fixedly installed on the inner edge of the outer bushing 3. A groove 6 and a groove 7 are provided on the outer edge of the rear end cover body 1. A sealing gasket 8 is fixedly installed on the end of the rear end cover body 1 near the groove 7. An extension sleeve 14 is fixedly installed on the end of the rear end cover body 1 away from the outer bushing 3. A sealing sleeve 3 15 is fixedly installed on the inner edge of the extension sleeve 14.

[0031] Specifically, a limiting groove 16 is provided on the inner edge of the outer bushing 3. A sealing sleeve 5 and a sealing sleeve 12 are snapped into the inner edge of the limiting groove 16. The sealing sleeve 5 is made of nitrile rubber, and the sealing sleeve 12 is made of fluororubber. The advantage is that the contour of the limiting groove 16 is adapted to the sealing sleeve 5 and the sealing sleeve 12. The snap-fit ​​structure restricts the radial and axial sliding of the sealing sleeve 5 and the sealing sleeve 12, preventing vibration from causing the sealing sleeve 5 and the sealing sleeve 12 to separate. In addition, the sealing sleeve 5 mainly prevents the grease of the bearing 4 from leaking outward, while the sealing sleeve 12 can further prevent external dust and moisture from entering the bearing 4 through the gap between the outer bushing 3 and the rotating shaft. The two work together to form a double protection against leakage and intrusion.

[0032] Specifically, multiple limit grooves 16, sealing sleeve 5, and sealing sleeve 2 12 are provided. Multiple limit grooves 16 correspond one-to-one with sealing sleeve 5 and sealing sleeve 2 12. The advantage is that by having multiple limit grooves 16 correspond one-to-one with sealing sleeve 5 and sealing sleeve 2 12, a multi-seal structure is formed, which improves the overall sealing reliability. Even if a single seal fails, the remaining sealing sleeves can still maintain the protective effect, which is suitable for the long-term continuous operation of the motor.

[0033] Specifically, a fixing cover 2 is fixedly installed at one end of the rear end cover body 1 near the outer bushing 3, and a reinforcing sleeve 11 is fixedly installed at one end of the rear end cover body 1 near the inner bushing 10. The advantage is that the fixing cover 2 strengthens the connection between the outer bushing 3 and the rear end cover body 1, and the reinforcing sleeve 11 enhances the rigidity of the rear end cover body 1 near the inner bushing 10, preventing the end cover from deforming and damaging the sealing gap, providing stable structural support for the multi-layer sealing structure, and adapting to the high speed and high load operating conditions of the motor.

[0034] Example 2: Figure 2-6 As shown, this is an improvement on the previous embodiment.

[0035] Specifically, an installation groove 9 is provided through one end of the rear cover body 1 near the sealing gasket 8. The installation groove 9 corresponds one-to-one with the sealing gasket 8. The advantage is that the installation groove 9 of the rear cover body 1 can position the sealing gasket 8, so that the sealing gasket 8 can cover the connection gap between the rear cover and the motor housing, and at the same time prevent the sealing gasket 8 from shifting during installation.

[0036] Specifically, a sealing ring 13 is fixedly installed at the end of the rear cover body 1 away from the outer bushing 3. The diameter of the sealing ring 13 is larger than the diameter of the extension sleeve 14. The sealing ring 13 is a rubber sealing ring. The advantage is that the large diameter design of the sealing ring 13 extends beyond the outer edge of the extension sleeve 14. When the extension sleeve 14 is connected with an adjacent component, the sealing ring 13 can cover the connection edge of the two, preventing liquid and dust from entering from the edge gap. In addition, the rubber material has good elastic recovery and can adapt to the slight irregularities of the edge when under pressure, filling the small gaps. Furthermore, the rubber's aging resistance and temperature resistance are adapted to the temperature changes during motor operation.

[0037] Specifically, there are four identical sealing sleeves 3 15, which are evenly distributed about the axis of the extension sleeve 14. The advantage is that the four equally spaced sealing sleeves 3 15 along the inner edge of the extension sleeve 14 form a uniform circumferential seal between the inner bushing 10 and the extension sleeve 14, ensuring that the sealing pressure around the inner bushing 10 is consistent, avoiding leakage caused by excessive local gaps, and adapting to the rotation and vibration conditions of the inner bushing 10.

[0038] Working principle: During use, the contour of the limiting groove 16 is adapted to the sealing sleeve 5 and the sealing sleeve 12. The snap-fit ​​structure restricts the radial and axial sliding of the sealing sleeve 5 and the sealing sleeve 12, preventing vibration from causing the sealing sleeve 5 and the sealing sleeve 12 to detach. The sealing sleeve 5 mainly prevents the grease of the bearing 4 from leaking outward, while the sealing sleeve 12 can further prevent external dust and moisture from entering the bearing 4 through the gap between the outer shaft sleeve 3 and the rotating shaft. The two work together to form a double protection against leakage and intrusion. The multiple limiting grooves 16 correspond one-to-one with the sealing sleeves 5 and 12 to form a multi-seal structure, improving the overall sealing reliability. Even if a single seal fails, the remaining sealing sleeves can still maintain the protective effect, which is suitable for the long-term continuous operation of the motor. The connection between the outer shaft sleeve 3 and the rear end cover body 1 is reinforced by the fixing cover 2, and the reinforcing sleeve 11 enhances the rigidity of the rear end cover body 1 near the inner shaft sleeve 10, preventing the end cover from deforming and damaging the sealing gap. This is a multi-layer sealing structure. It provides stable structural support and is suitable for high-speed and high-load operation of the motor. The mounting groove 9 of the rear cover body 1 can position the sealing gasket 8, allowing the sealing gasket 8 to cover the connection gap between the rear cover and the motor housing, while preventing the sealing gasket 8 from shifting during installation. The large diameter design of the sealing ring 13 extends beyond the outer edge of the extension sleeve 14. When the extension sleeve 14 is connected to an adjacent component, the sealing ring 13 can cover the connection edge of the two, preventing liquid and dust from entering from the edge gap. The rubber material has good elastic recovery and can adapt to the slight irregularities of the edge when under pressure, filling the small gaps. The rubber's aging resistance and temperature resistance are suitable for the temperature changes during motor operation. The four equally spaced sealing sleeves 15 on the inner edge of the extension sleeve 14 form a uniform circumferential seal between the inner bushing 10 and the extension sleeve 14, ensuring consistent sealing pressure around the inner bushing 10 and avoiding leakage caused by excessive local gaps. It is suitable for the rotation and vibration conditions of the inner bushing 10.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer sealed motor end cover structure, comprising a rear end cover body (1), an outer bushing (3), and an inner bushing (10), characterized in that: A bearing (4) and a sealing sleeve (5) are fixedly installed on the inner edge of the outer bushing (3). A groove (6) and a groove (7) are provided on the outer edge of the rear end cover body (1). A sealing gasket (8) is fixedly installed on the end of the rear end cover body (1) near the groove (7). An extension sleeve (14) is fixedly installed on the end of the rear end cover body (1) away from the outer bushing (3). A sealing sleeve (15) is fixedly installed on the inner edge of the extension sleeve (14).

2. The multi-layer sealed motor end cover structure according to claim 1, characterized in that: A limiting groove (16) is provided at the inner edge of the outer bushing (3), and a sealing sleeve one (5) and a sealing sleeve two (12) are engaged at the inner edge of the limiting groove (16).

3. The multi-layer sealed motor end cover structure according to claim 2, characterized in that: The limiting groove (16), sealing sleeve one (5) and sealing sleeve two (12) are provided in multiple identical quantities, and the multiple limiting grooves (16) correspond one-to-one with sealing sleeve one (5) and sealing sleeve two (12).

4. The multi-layer sealed motor end cover structure according to claim 1, characterized in that: A fixing cover (2) is fixedly installed at one end of the rear end cover body (1) near the outer bushing (3), and a reinforcing sleeve (11) is fixedly installed at one end of the rear end cover body (1) near the inner bushing (10).

5. The multi-layer sealed motor end cover structure according to claim 1, characterized in that: The end of the rear cover body (1) near the sealing gasket (8) is provided with a through-hole mounting groove (9), and the mounting groove (9) corresponds one-to-one with the sealing gasket (8).

6. The multi-layer sealed motor end cover structure according to claim 1, characterized in that: A sealing ring (13) is fixedly installed at the end of the rear cover body (1) away from the outer bushing (3). The diameter of the sealing ring (13) is larger than the diameter of the extension sleeve (14). The sealing ring (13) is a rubber sealing ring.

7. The multi-layer sealed motor end cover structure according to claim 1, characterized in that: There are four identical sealing sleeves (15), and the four sealing sleeves (15) are distributed at equal intervals about the axis of the extension sleeve (14).

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