Motor sealing ring

Abstract

The utility model relates to the field of sealing rings. The motor sealing ring comprises a sealing ring body formed through integrated injection molding and an elastomer O-shaped ring detachably connected to the outer ring side of the sealing ring body, an embedding groove is formed in the outer ring side of the sealing ring body in the circumferential direction of the sealing ring body, and the O-shaped ring is embedded into the embedding groove. A flow guide groove is formed in the end of the sealing ring body, and the two ends of the flow guide groove communicate with the inner ring side of the sealing ring body and the caulking groove correspondingly. The motor has the effects of reducing leakage of fluid in the motor and improving the sealing performance of the motor.

Description

Technical Field

[0001] The present application relates to the field of sealing rings, and in particular to a sealing ring for a motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Its main function is to generate driving torque and serve as a power source for electrical appliances or various machines. When the output shaft of the motor rotates, there is a gap between the output shaft and the housing, and dust and water droplets in the air can easily enter the motor through the gap and affect the motor's operation.

[0003] The prior art adds a rubber seal ring at the connection between the output shaft and the housing to seal and prevent dust. The housing has a groove, and during assembly, the rubber seal ring is placed in the groove, and the output shaft of the motor is passed through the rubber seal ring. At this time, the rubber seal ring is deformed by force and fills the entire groove, thereby achieving a sealing effect.

[0004] The existing rubber sealing ring and the motor output shaft are usually set to have line contact. When the lubricating fluid in the motor accumulates too much at the contact point between the rubber sealing ring and the motor output shaft, the fluid will exert a greater pressure on the sealing ring, and then leak out from the contact point between the sealing ring and the motor output shaft, affecting the sealing performance. Utility Model Content

[0005] In order to reduce the leakage of fluid inside the motor and improve the sealing of the motor, the present application provides a motor sealing ring.

[0006] The present application provides a motor sealing ring adopting the following technical solution:

[0007] A motor seal ring comprises an integrally injection-molded seal ring body and an elastomeric O-ring detachably connected to the outer ring side of the seal ring body, wherein the outer ring side of the seal ring body is provided with an embedding groove around its circumferential direction, and the O-ring is embedded in the embedding groove, and the end of the seal ring body is provided with a guide groove, and the two ends of the guide groove are respectively connected to the inner ring side of the seal ring body and the embedding groove.

[0008] By adopting the above technical solution, the O-ring made of elastic material can apply pressure to the sealing ring body toward the output shaft, thereby making the sealing ring body and the output shaft fit more closely and increasing the sealing between the sealing ring body and the output shaft; the setting of the guide groove can divert the fluid accumulated between the inner ring side of the sealing ring body and the output shaft, and divert the fluid to the gap between the embedded groove and the O-ring, thereby reducing the pressure on the contact point between the sealing ring body and the output shaft. At the same time, the diverted liquid can be diverted and filled into the gap between the outer ring side of the sealing ring body and the groove to enhance the sealing force.

[0009] Optionally, the guide groove is opened along the width direction of the sealing ring body, and the diameter length of the O-ring is set to be greater than the height of the embedding groove.

[0010] By adopting the above technical solution, the guide groove is opened along the width direction of the sealing ring body, so that the guide groove can simultaneously connect the inner ring side and the outer ring side of the sealing ring body, and the diameter length of the O-ring is set to be greater than the height of the embedded groove, so that the outer ring side of the sealing ring body does not contact the bottom wall of the groove, and only the part of the O-ring protruding from the bottom wall contacts the bottom wall of the groove, thereby forming a gap connecting the embedded groove between the outer ring side of the sealing ring body and the groove, realizing the connection between the guide groove and the embedded groove, so that the fluid can enter the gap formed between the outer ring side of the sealing ring body and the groove and the gap between the O-ring and the embedded groove along the guide groove. At the same time, during the rotation of the output shaft, the O-ring replaces the sealing ring body to bear part of the friction between the groove, thereby extending the service life of the sealing ring body.

[0011] Optionally, a sealing lip is integrally formed on the inner ring side of the sealing ring body along its circumferential direction, and the sealing lip is in linear contact with the output shaft.

[0012] By adopting the above technical solution, when the contact area between the inner ring side of the motor and the output shaft is too large, the friction generated by the rotation of the output shaft and the motor is also greater, which not only affects the operating speed of the motor output shaft, but also causes losses to both the sealing ring body and the motor output shaft. The line contact between the sealing lip and the output shaft can reduce the friction between the inner ring side of the sealing ring body and the output shaft while ensuring the sealing of the sealing ring body and the output shaft, thereby reducing the influence of the sealing ring body on the rotation of the motor output shaft.

[0013] Optionally, an oil storage tank is provided on the sealing lip.

[0014] By adopting the above technical solution, the setting of the oil storage tank can, on the one hand, provide a certain storage space for the fluid overflowing between the sealing lip and the output shaft, so that the fluid first enters the oil storage tank when it is about to overflow the connection between the sealing lip and the output shaft, thereby reducing fluid leakage; on the other hand, the fluid entering the oil storage tank can fully contact the outer wall of the output shaft, which has a certain lubrication effect on the rotation of the output shaft, thereby reducing the friction between the sealing lip and the output shaft; at the same time, the fluid in the oil storage tank will fill the gap between the sealing lip and the output shaft, thereby having a certain blocking effect on the fluid inside the motor that is about to overflow between the sealing lip and the output shaft, thereby enhancing the sealing performance of the sealing ring body to a certain extent.

[0015] Optionally, the oil storage groove is opened along the circumferential direction of the sealing lip.

[0016] By adopting the above technical solution, the oil storage tank is opened along the circumferential direction of the sealing lip. On the one hand, it ensures that the fluid that penetrates into the connection between the sealing lip and the output shaft can enter the oil storage tank from all directions. On the other hand, it also increases the space for fluid storage and provides a larger contact area between the fluid and the output shaft.

[0017] Optionally, the diameter height of the outer ring side of the sealing ring body is greater than the diameter length of the groove.

[0018] By adopting the above technical solution, after the sealing ring body is operated to be embedded in the groove, since the diameter height of the outer ring side of the sealing ring body is greater than the diameter length of the groove, the outer ring side of the sealing ring body will be tightly abutted against the inner wall of the groove, thereby increasing the friction between the sealing ring body and the groove, thereby reducing the probability of the sealing ring body rotating with the motor output shaft.

[0019] Optionally, the diameter height of the sealing ring body gradually decreases from an end close to its outer ring side toward an end close to its inner ring side.

[0020] By adopting the above technical solution, the thickness diameter of the outer ring side of the sealing ring is set to be larger than the thickness diameter of the inner ring side of the sealing ring, which reduces the difficulty of the sealing ring body entering the groove on the one hand, and provides more storage space for the fluid on the other hand.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The setting of the guide groove can guide part of the fluid that is about to overflow from the motor to the gap between the sealing ring body and the groove and the gap between the O-ring and the embedded groove, thereby playing a certain role in diverting the fluid accumulated at the connection between the sealing lip and the motor output shaft, reducing the pressure at this place, thereby reducing the probability of fluid overflow;

[0023] 2. The setting of the oil storage tank can provide a certain storage space for the fluid that penetrates into the connection between the sealing lip and the motor output shaft, so that the fluid will first enter the oil storage tank when it is about to overflow, and at the same time, the fluid can fill the gap between the sealing lip and the motor output shaft, further increasing the sealing performance of the sealing lip;

[0024] 3. By making the diameter height of the outer ring side of the sealing ring body larger than the diameter length of the groove, after the sealing ring body enters the groove, the side wall of the outer ring side of the sealing ring body can apply pressure to the inner wall of the groove and tightly abut against the groove, thereby increasing the friction between the sealing ring body and the groove, making the sealing ring body more firmly connected in the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the overall structure of this application.

[0026] Figure 2 It is a schematic diagram to illustrate the structure and position relationship between the motor output shaft and the casing.

[0027] Figure 3 yes Figure 2 Schematic diagram of a partial cross-section of the overall structure.

[0028] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0029] Explanation of the reference numerals: 1. sealing ring body; 11. embedding groove; 12. sealing lip; 121. oil storage tank; 13. guide groove; 2. O-ring; 3. output shaft; 4. housing; 41. groove. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The present application embodiment discloses a motor sealing ring, which is sleeved on the output shaft 3 of the motor and embedded in the groove 41 of the housing 4, and is used to seal the connection between the motor output shaft 3 and the housing 4. Figure 1 , Figure 2 and Figure 3 The motor seal ring includes an annular seal ring body 1 formed by integral injection molding and an elastic body O-ring 2 detachably connected to the outside of the seal ring body 1. The inner ring side of the seal ring body 1 is integrally injection molded with a sealing lip 12 along its circumferential direction, and the outer ring side of the seal ring body 1 is provided with an embedding groove 11 for embedding the O-ring 2 along its circumferential direction, and the height of the embedding groove 11 is less than the diameter length of the O-ring 2. When in use, the seal ring body 1 together with the O-ring 2 is embedded in the groove 41 of the housing 4, and the part of the O-ring 2 protruding from the embedding groove 11 will abut against the bottom wall of the groove 41, and the output shaft 3 of the motor is passed through the inner ring side of the seal ring body 1 and abuts against the sealing lip 12, and the width of the sealing lip 12 is set so that it is in line contact with the motor output shaft 3, thereby ensuring that the friction between the sealing lip 12 and the motor output shaft 3 is reduced while sealing.

[0032] Reference Figure 1 , Figure 3 and Figure 4It can be understood that, in order to reduce the friction between the sealing lip 12 and the output shaft 3, the sealing lip 12 is set to be thinner and in line contact with the output shaft 3. As the thickness of the sealing lip 12 decreases, the probability of the fluid impacting the sealing lip 12 and leaking out also increases. Therefore, an oil storage groove 121 is also provided on the sealing lip 12, and the oil storage groove 121 is provided along the length direction of the sealing lip 12. When in use, the fluid that penetrates into the connection between the sealing lip 12 and the output shaft 3 will enter the oil storage groove 121, and the fluid in the oil storage groove 121 can contact the output shaft 3 to lubricate it, and at the same time can seal the connection between the sealing lip 12 and the output shaft 3 to prevent the fluid inside the motor from leaking out.

[0033] Since the storage capacity of the oil storage tank 121 is limited, in order to seal the connection between the motor output shaft 3 and the housing 4 to a greater extent and reduce fluid leakage, refer to Figure 1 and Figure 4 , a guide groove 13 is also provided at the end of the sealing ring body 1. The guide groove 13 is provided along the width direction of the sealing ring body 1, and the guide groove 13 runs through the sealing ring body 1 and the two ends are connected to the inner ring side and the outer ring side of the sealing ring body 1 respectively. When in use, a part of the fluid in the motor penetrates into the connection between the sealing lip 12 and the output shaft 3 and enters the oil storage tank 121, and the other part flows along the guide groove 13 into the gap between the outer ring side and the groove 41 and the gap between the O-ring 2 and the embedded groove 11. The fluid entering the embedded groove 11 will fill the gap between the O-ring 2 and the embedded groove 11, thereby enhancing the sealing between the O-ring 2 and the groove 41.

[0034] It can be understood that a plurality of guide grooves 13 can be provided at intervals along the circumference direction of the sealing ring body 1 as needed. The more guide grooves 13 are provided, the faster the fluid is guided into the embedded groove 11. Figure 1 In the embodiment of the present application, four guide grooves 13 are provided at intervals along the circumference direction of the sealing ring body 1 as an example for explanation.

[0035] Reference Figure 4 The diameter height of the outer ring side of the sealing ring body 1 is processed to be greater than the diameter length of the groove 41. When in use, after the sealing ring body 1 is embedded in the groove 41, it will recover its deformation under the action of its own elastic force, and the sealing ring body 1 will expand toward the wall of the groove 41, so as to more closely abut against the wall of the groove 41 and enhance the sealing performance.

[0036] Reference Figure 4In order to cooperate with the embedded connection between the sealing ring body 1 and the groove 41 and reduce the difficulty of the sealing ring body 1 entering the groove 41, the diameter height of the sealing ring body 1 is processed to gradually decrease from the end close to the outer ring side to the end close to the outer inner ring side, so that the vertical cross-section of the sealing ring body 1 is in the shape of a bell mouth. When in use, the sealing ring body 1 can form an inclined slope from the outer ring side to the inner ring side, so that the sealing ring body 1 can slide into the groove 41 more easily along the slope.

[0037] The implementation principle of the motor seal ring of the embodiment of the present application is as follows: when in use, the seal ring body 1 together with the O-ring 2 are embedded in the groove 41 on the housing 4, the outer wall of the seal ring body 1 is tightly abutted against the inner wall of the groove 41, and the side of the O-ring 2 away from the embedding groove 11 is abutted against the bottom wall of the groove 41. The output shaft 3 of the motor is arranged inside the seal ring body 1 and is in line contact with the sealing lip 12.

[0038] As the motor is used, the fluid in the motor will seep into the connection between the housing 4 and the output shaft 3. A portion of the fluid that has seeped into this connection will first enter the oil storage tank 121 after breaking the sealing lip 12. The fluid that has entered the oil storage tank 121 will continue to accumulate until the entire oil storage tank 121 is filled. When the oil storage tank 121 is full, the fluid in the oil storage tank 121 can also fully contact the output shaft 3 of the motor. At this time, the output shaft 3 of the motor can be fully lubricated during the rotation process. At the same time, it is difficult for the fluid in the motor to break through the fluid layer in the oil storage tank 121 and flow to the outside. In the process of the fluid flowing into the oil storage tank 121, a part of the fluid will flow into the gap between the outer ring side of the sealing ring and the groove 41 along the four guide grooves 13, and enter the gap between the embedded groove 11 and the O-ring 2 along the gap, thereby reducing the accumulation of fluid at the connection between the sealing lip 12 and the output shaft 3, so as to reduce the pressure on the sealing lip 12, and at the same time, the fluid entering the embedded groove 11 will continue to accumulate until it fills the gap between the embedded groove 11 and the O-ring 2, and then form a fluid layer between the O-ring 2 and the groove 41, so as to reduce the probability of the fluid in the motor breaking through the O-ring 2 and flowing to the outside. Through a motor sealing ring, especially the setting of the guide groove 13 and the oil storage tank 121, the fluid in the motor can be stored or diverted in time when the fluid is about to overflow the connection between the sealing ring body 1 and the motor output shaft 3, thereby reducing the leakage of the fluid, and forming a fluid layer on the inside and outside of the sealing ring body 1 to prevent further leakage of the fluid inside the motor, thereby enhancing the sealing performance of the sealing ring body 1.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A motor sealing ring, characterized in that: The invention comprises an integrally injection-molded sealing ring body (1) and an elastomeric O-ring (2) detachably connected to the outer ring side of the sealing ring body (1); the outer ring side of the sealing ring body (1) is provided with an embedding groove (11) around its circumferential direction, and the O-ring (2) is embedded in the embedding groove (11); the end of the sealing ring body (1) is provided with a guide groove (13), and the two ends of the guide groove (13) are respectively connected to the inner ring side of the sealing ring body (1) and the embedding groove (11).

2. The motor sealing ring according to claim 1, characterized in that: The guide groove (13) is opened along the width direction of the sealing ring body (1), and the diameter length of the O-ring (2) is set to be greater than the height of the embedding groove (11).

3. The motor sealing ring according to claim 1, characterized in that: A sealing lip (12) is integrally formed on the inner ring side of the sealing ring body (1) along its circumferential direction, and the sealing lip (12) is in linear contact with the output shaft (3).

4. The motor sealing ring according to claim 3, characterized in that: An oil storage groove (121) is provided on the sealing lip (12).

5. The motor sealing ring according to claim 4, characterized in that: The oil storage groove (121) is opened along the circumferential direction of the sealing lip (12).

6. The motor sealing ring according to claim 1, characterized in that: The diameter height of the outer ring side of the sealing ring body (1) is greater than the diameter length of the groove (41).

7. The motor sealing ring according to claim 1, characterized in that: The diameter height of the sealing ring body (1) gradually decreases from an end close to its outer ring side toward an end close to its inner ring side.

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