Dynamic sealing structure, hub motor, wheel and vehicle

Abstract

The utility model relates to a dynamic sealing structure, a hub motor, a wheel and a vehicle, the dynamic sealing structure is used for being circumferentially arranged between a rotor and a stator of the motor, and the dynamic sealing structure comprises a first sealing assembly, a second sealing assembly and a third sealing assembly, the other opposite side of the stator is used for being in interference fit with the other one of the rotor or the stator; and the second sealing assembly is used for being installed on one of the rotor and the stator, the second sealing assembly comprises a blocking piece, and the blocking piece is arranged on the outer side of the first sealing assembly. The first sealing assembly is installed on one of the rotor and the stator in a sealing mode and is in interference fit with the other one of the rotor and the stator to form first sealing, the second sealing assembly comprises a blocking piece, and the blocking piece is arranged on the outer side of the first sealing assembly to form second sealing. And a multi-sealing mode is adopted, so that the sealing effect of the dynamic sealing structure is better.

Description

Technical Field

[0001] The present disclosure relates to the technical field of dynamic seals, and in particular to a dynamic seal structure, a hub motor, a wheel and a vehicle. Background Art

[0002] Since the hub motor is arranged inside the wheel, it is subjected to long-term vibration and impact, and is exposed under the chassis. It faces mud, water, dust and a harsh working environment, so the sealing requirements are stringent. The related technology simply uses a single layer of sealing, and the sealing effect is poor. Utility Model Content

[0003] The purpose of the present disclosure is to provide a dynamic sealing structure, a hub motor, a wheel and a vehicle, which can solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a dynamic sealing structure for being circumferentially arranged between the rotor and the stator of an electric motor, the dynamic sealing structure comprising: a first sealing assembly, one side of which is used for sealing installation on one of the rotor or the stator, and the other side thereof is used for interference fit with the other of the rotor or the stator; and a second sealing assembly for being installed on one of the rotor or the stator, the second sealing assembly comprising a blocking member, and the blocking member is arranged on the outside of the first sealing assembly.

[0005] Optionally, the rotor is rotatably connected to the outside of the stator, the first sealing assembly is mounted on the rotor and is used for interference fit with the axial surface of the stator, and the second sealing assembly is mounted on the stator.

[0006] Optionally, the first sealing assembly includes a support member and a first elastic sealing member, and the first elastic sealing member is connected to the support member by vulcanization.

[0007] Optionally, the first elastic seal comprises a first sealing portion, the cross section of the first sealing portion is configured to be conical, and the apex of the cone is used for interference fit with the axial surface of the stator.

[0008] Optionally, a gap is provided between the blocking member and the rotor to avoid friction between the blocking member and the rotor.

[0009] Optionally, the first elastic sealing member further includes a second sealing portion, one end of the second sealing portion extends toward the blocking member and is interference fit with the blocking member, and the second sealing portion is tilted toward the direction of the rotor.

[0010] Optionally, the dynamic sealing structure further comprises a flexible sealing member, which is arranged at the gap, one end of which is connected to the blocking member, and the other end of which is used for interference fit with the rotor.

[0011] Optionally, the first sealing assembly is configured to be interference fit with the rotor and to rotate synchronously with the rotor.

[0012] Optionally, one end of the support member close to the rotor extends along the axial direction of the stator to form a first assembly surface, and the first elastic seal also includes a third sealing portion, which extends to a side of the first assembly surface close to the rotor to seal the first sealing assembly to the rotor.

[0013] Optionally, the second sealing assembly is interference fit with the stator.

[0014] Optionally, the second sealing assembly also includes a second assembly surface and a second elastic seal, the second assembly surface is arranged at an end of the blocking member close to the stator and extends along the axial direction of the stator, and the second elastic seal is connected to the side of the second assembly surface close to the stator through vulcanization, so that the second sealing assembly is sealed and connected to the stator.

[0015] Optionally, the second assembly surface is disposed between the first sealing assembly and an axial surface of the stator and is connected to the blocking member so that the first sealing assembly is interference fit with the second assembly surface.

[0016] Optionally, two first sealing parts are provided at intervals along the axial direction of the stator, and a sealing cavity is formed between the two first sealing parts for filling with grease.

[0017] Optionally, the first elastic sealing member has a connecting edge for connecting the two first sealing portions, and the dynamic sealing structure further includes a fixing ring, which is sleeved on the connecting edge.

[0018] A second object of the present disclosure is to provide a hub motor, comprising: the above-mentioned dynamic sealing structure.

[0019] The third object of the present disclosure is to provide a wheel, comprising: the above-mentioned hub motor.

[0020] A fourth object of the present disclosure is to provide a vehicle, comprising: the above-mentioned wheel.

[0021] Through the above technical solution, the dynamic sealing structure provided by the present invention is used to seal the gap between the rotor and the stator. The first sealing component is sealingly installed on one of the rotor or the stator and is interference fit with the other of the two to form a first seal. The second sealing component includes a blocking member, which is arranged on the outer side of the first sealing component to form a second seal. The use of multiple sealing methods makes the sealing effect of the dynamic sealing structure better.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0024] Figure 1 is a cross-sectional view of the wheel hub motor in the present disclosure;

[0025] Figure 2 yes Figure 1 A partial enlarged view of one of the embodiments;

[0026] Figure 3 yes Figure 1 A partial enlarged view of another embodiment of the present invention;

[0027] Figure 4 is a cross-sectional view of the dynamic sealing structure in the present disclosure.

[0028] Description of Reference Numerals

[0029] 1. First sealing component; 11. Support member; 111. First assembly surface; 12. First elastic sealing member; 121. First sealing portion; 122. Second sealing portion; 123. Third sealing portion; 124. Connecting edge; 2. Second sealing component; 21. Blocking member; 22. Second assembly surface; 23. Second elastic sealing member; 3. Rotor; 4. Stator; 5. Flexible sealing member; 6. Fixing ring; 7. Gap. DETAILED DESCRIPTION

[0030] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0031] In the present disclosure, unless otherwise stated, the directional words used, such as "inside" and "outside", refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first, second, third", etc., are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0032] The present disclosure provides a dynamic sealing structure, which is used to be circumferentially arranged between the rotor 3 and the stator 4 of the motor. The dynamic sealing structure includes: a first sealing component 1, one side of which is used for sealing installation on one of the rotor 3 or the stator 4, and the other side is used for interference fit with the other of the rotor 3 or the stator 4; and a second sealing component 2, which is used to be installed on one of the rotor 3 or the stator 4, and the second sealing component 2 includes a blocking member 21, which is arranged on the outside of the first sealing component 1.

[0033] Through the above technical scheme, the dynamic sealing structure provided by the present invention is used to seal the gap between the rotor 3 and the stator 4. The dynamic sealing structure is arranged circumferentially, that is, the dynamic sealing structure is arranged in a ring shape. The first sealing component 1 is sealingly installed on one of the rotor 3 or the stator 4 and has an interference fit with the other of the two to form a first seal. The second sealing component 2 includes a blocking member 21, and the blocking member 21 is arranged on the outer side of the first sealing component 1, that is, the direction in which dust enters, to form a second seal. The use of multiple sealing methods makes the sealing effect of the dynamic sealing structure better.

[0034] As an optional implementation, Figure 1-3 As shown, the rotor 3 is rotatably connected to the outside of the stator 4, the first sealing assembly 1 is mounted on the rotor 3 and is used for interference fit with the axial surface of the stator 4, the second sealing assembly 2 is mounted on the stator 4, the first sealing assembly 1 is mounted on the rotor 3 and is used for interference fit with the axial surface of the stator 4, the axial surface is the surface extending along the axial direction of the stator 4, that is, the extension direction of the first sealing assembly 1 is in the same direction as the direction of the centrifugal force generated when the rotor 3 rotates. Since the rotor 3 is arranged on the outside of the stator 4, the axial surface pressing force between the first sealing assembly 1 and the stator 4 is reduced under the action of the centrifugal force, which can reduce the wear of the first sealing assembly 1 and increase the service life. In other embodiments, the first sealing assembly 1 can also be mounted on the stator 4, and the second sealing assembly 2 is mounted on the rotor 3, and the first sealing assembly 1 is interference fit with the radial surface of the rotor 3. Of course, the first sealing assembly 1 and the second sealing assembly 2 can also be installed on the same side, for example, both are mounted on the rotor 3 or both are mounted on the stator 4.

[0035] As an optional implementation, Figure 2-4As shown, the first sealing component 1 includes a support member 11 and a first elastic seal member 12. The first elastic seal member 12 is connected to the support member 11 by vulcanization. The support member 11 is a rigid member, which serves as a supporting skeleton. The first elastic seal member 12 utilizes elasticity to achieve sealing by interference fit with the stator 4. For example, the first elastic seal member 12 is made of rubber, which may be nitrile rubber, acrylic rubber, polyurethane rubber, silicone rubber, fluororubber, polytetrafluoroethylene resin, etc.

[0036] Alternatively, if Figure 4 As shown, the first elastic seal 12 includes a first sealing portion 121. The cross-section of the first sealing portion 121 is constructed as a cone, and the apex of the cone is used for interference fit with the axial surface of the stator 4. The first sealing portion 121 is constructed as a cone, which can reduce the contact area with the stator 4, thereby reducing friction and reducing the wear of the first sealing portion 121 and the stator 4.

[0037] Alternatively, if Figure 4 As shown, two first sealing parts 121 are arranged at intervals along the axial direction of the stator 4, and a sealing cavity is formed between the two first sealing parts 121 for filling with grease. The grease can be filled between the two first sealing parts 121 to lubricate and cool the moving parts, reduce seal wear, and increase service life. The grease is in paste form and can be applied between the two first sealing parts 121 before installing the first sealing assembly 1.

[0038] Optionally, the first elastic seal 12 has a connecting edge 124 for connecting the two first sealing parts 121, and the dynamic sealing structure also includes a fixing ring 6, which is sleeved on the connecting edge 124. For example, two fixing rings 6 are provided because two first sealing parts 121 are provided, and the connecting edge 124 is an elastic part. In order to make the first sealing part 121 and the stator 4 have an interference fit, the fixing ring 6 is used to press them, thereby increasing the pressing force between the first sealing part 121 and the stator 4.

[0039] Alternatively, if Figure 2 As shown, there is a gap 7 between the blocking member 21 and the rotor 3 to avoid friction between the blocking member 21 and the rotor 3. If the blocking member 21 is in direct contact with the rotor 3, the blocking member 21 and the rotor 3 will be worn. Therefore, the gap 7 is set between the blocking member 21 and the rotor 3. Due to the existence of the gap 7, a small amount of water, dust and other foreign matter will enter. Therefore, the width of the gap 7 is set to be smaller. For example, the width of the gap 7 is 0.5mm-1mm. Even if a small amount of foreign matter enters, when the motor rotates at high speed, the water, dust and other foreign matter can also be thrown out from the gap 7 by the action of centrifugal force.

[0040] Alternatively, if Figure 4As shown, the first elastic seal 12 also includes a second sealing portion 122, one end of the second sealing portion 122 extends toward the blocking member 21 and is interference fit with the blocking member 21, the second sealing portion 122 is interference fit with the blocking member 21 to form a third seal, which can block dust entering through the gap 7 and prevent the dust from contacting the first sealing portion 121, thereby reducing the wear of the first sealing portion 121; and the second sealing portion 122 is tilted toward the direction of the rotor 3, so that under the centrifugal force of the rotor 3, the clamping force between the second sealing portion 122 and the blocking member 21 is reduced to reduce the wear of the second sealing portion 122.

[0041] In addition, if Figure 3 As shown, the dynamic sealing structure further includes a flexible plugging member 5, which is arranged at the gap 7, one end of which is connected to the blocking member 21, and the other end is used for interference fit with the rotor 3. The gap 7 is blocked by the flexible plugging member 5 to prevent dust from entering from the gap 7. At this time, the number of second sealing parts 122 can be reduced, or even no second sealing part 122 is provided, for example, the flexible plugging member 5 is felt. The use of the flexible plugging member 5 can not only achieve the blocking of the gap 7, but also will not affect the rotation of the rotor 3 by utilizing its flexible characteristics.

[0042] In the first embodiment, the flexible blocking member 5 is provided, and the second sealing portion 122 is not provided, and the gap 7 is blocked by the flexible blocking member 5;

[0043] In the second embodiment, a flexible sealing member 5 and a second sealing portion 122 are provided. In this case, the number of the second sealing portions 122 can be reduced. For example, normally two second sealing portions 122 are provided, but in this case, only one can be provided.

[0044] As an optional implementation, Figure 2-3 As shown, the first sealing assembly 1 is used to have an interference fit with the rotor 3 and rotate synchronously with the rotor 3, that is, the first sealing assembly 1 is detachably mounted on the motor, which is convenient for maintenance and replacement; the first sealing assembly 1 is interference fit with the rotor 3 through the tension of the support member 11, and since the support member 11 in contact with the rotor 3 is a rigid member, and the first elastic sealing member 12 in contact with the stator 4 is an elastic member, the pressure between the first sealing assembly 1 and the rotor 3 is greater than the pressure between the first sealing assembly 1 and the stator 4, so the first sealing assembly 1 can rotate synchronously with the rotor 3.

[0045] Alternatively, if Figure 2-4As shown, one end of the support member 11 close to the rotor 3 extends along the axial direction of the stator 4 to form a first assembly surface 111, and the first elastic seal 12 also includes a third sealing portion 123, and the third sealing portion 123 extends to the side of the first assembly surface 111 close to the rotor 3 so that the first sealing assembly 1 is sealed and connected to the rotor 3. The support member 11 has a first assembly surface 111, and the third sealing portion 123 is arranged on the first assembly surface 111, which increases the contact area with the rotor 3, thereby increasing the sealing effect with the rotor 3, and utilizing the interference fit of the support member 11 and the elasticity of the third sealing portion 123 to achieve an interference fit with the rotor 3, while also increasing the friction with the rotor 3, thereby preventing the first sealing assembly 1 from slipping when the rotor 3 rotates.

[0046] As an optional implementation, Figure 2-4 As shown, the second sealing assembly 2 is interference-fitted with the stator 4, and the second sealing assembly 2 is detachably mounted on the motor for easy maintenance and replacement.

[0047] Alternatively, if Figure 4 As shown, the second sealing component 2 also includes a second assembly surface 22 and a second elastic seal 23. The second assembly surface 22 is arranged at one end of the blocking member 21 close to the stator 4 and extends along the axial direction of the stator 4. The second elastic seal 23 is connected to the side of the second assembly surface 22 close to the stator 4 through vulcanization, so that the second sealing component 2 is sealed and connected to the stator 4. The second sealing component 2 includes a second assembly surface 22, and the second elastic seal 23 is arranged on the second assembly surface 22, which increases the contact area with the stator 4, thereby increasing the sealing effect with the stator 4. The interference fit with the stator 4 is achieved by utilizing the interference amount of the blocking member 21 and the second assembly surface 22 and the elasticity of the second elastic seal 23, while also increasing the friction with the stator 4 to prevent the second sealing component 2 from rotating.

[0048] Alternatively, if Figure 2-3 As shown, the second assembly surface 22 is arranged between the first sealing component 1 and the axial surface of the stator 4 and is connected to the blocking member 21, so that the first sealing component 1 and the second assembly surface 22 are interference fit. The second assembly surface 22 also serves as the friction surface of the first sealing component 1. When the rotor 3 rotates, the first sealing component 1 and the second assembly surface 22 rub against each other. This can avoid direct friction between the first sealing component 1 and the stator 4, causing wear to the stator 4. It is only necessary to replace the second sealing component 2 regularly without replacing the entire stator 4.

[0049] like Figure 1 As shown, the second purpose of the present disclosure is to provide a hub motor, including: the above-mentioned dynamic sealing structure, which is used to seal the gap between the stator 4 and the rotor 3 of the hub motor, and adopts a multiple sealing method to make the sealing effect of the dynamic sealing structure better.

[0050] The third object of the present disclosure is to provide a wheel, comprising: the above-mentioned hub motor, which is installed in the hub of the wheel to enhance the sealing effect of the wheel.

[0051] The fourth object of the present disclosure is to provide a vehicle, comprising: the above-mentioned wheels, to ensure the normal operation of the vehicle and reduce the number of vehicle maintenance times.

[0052] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0054] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A dynamic sealing structure, used for being circumferentially arranged between the rotor and the stator of a motor, characterized in that: The dynamic sealing structure includes: A first sealing assembly, one side of which is used for sealing installation on one of the rotor or the stator, and the other side of which is used for interference fit with the other of the rotor or the stator; and The second sealing assembly is used for being installed on one of the rotor or the stator. The second sealing assembly comprises a blocking member, and the blocking member is arranged on the outside of the first sealing assembly.

2. The dynamic sealing structure according to claim 1, characterized in that: The rotor is rotatably connected to the outer side of the stator. The first sealing assembly is mounted on the rotor and is used for interference fit with the axial surface of the stator. The second sealing assembly is mounted on the stator.

3. The dynamic sealing structure according to claim 2, characterized in that: The first sealing component includes a support member and a first elastic sealing member, and the first elastic sealing member is connected to the support member by vulcanization.

4. The dynamic sealing structure according to claim 3, characterized in that: The first elastic seal comprises a first sealing portion, the cross section of which is configured to be conical, and the apex of the cone is used for interference fit with the axial surface of the stator.

5. The dynamic sealing structure according to claim 3, characterized in that: A gap is provided between the blocking member and the rotor to prevent friction between the blocking member and the rotor.

6. The dynamic sealing structure according to claim 5, characterized in that: The first elastic sealing member further comprises a second sealing portion, one end of which extends toward the blocking member and is interference-fitted with the blocking member, and the second sealing portion is tilted toward the direction of the rotor.

7. The dynamic sealing structure according to claim 5 or 6, characterized in that: The dynamic sealing structure further comprises a flexible sealing member, which is arranged at the gap, one end of which is connected to the blocking member, and the other end of which is used for interference fit with the rotor.

8. The dynamic sealing structure according to claim 3, characterized in that: The first sealing assembly is used for interference fit with the rotor and synchronous rotation with the rotor.

9. The dynamic sealing structure according to claim 8, characterized in that: One end of the support member close to the rotor extends along the axial direction of the stator to form a first assembly surface, and the first elastic seal also includes a third sealing portion, which extends to a side of the first assembly surface close to the rotor to enable the first sealing assembly to be sealed and connected to the rotor.

10. The dynamic sealing structure according to claim 2, characterized in that: The second sealing assembly is interference fit with the stator.

11. The dynamic sealing structure according to claim 10, characterized in that: The second sealing assembly also includes a second assembly surface and a second elastic seal. The second assembly surface is arranged at an end of the blocking member close to the stator and extends along the axial direction of the stator. The second elastic seal is connected to the side of the second assembly surface close to the stator through vulcanization to ensure that the second sealing assembly is sealed and connected to the stator.

12. The dynamic sealing structure according to claim 11, characterized in that: The second assembly surface is disposed between the first sealing component and an axial surface of the stator and is connected to the blocking member so that the first sealing component is interference-fitted with the second assembly surface.

13. The dynamic sealing structure according to claim 4, characterized in that: Two first sealing parts are arranged at intervals along the axial direction of the stator, and a sealing cavity is formed between the two first sealing parts for filling with grease.

14. The dynamic sealing structure according to claim 13, characterized in that: The first elastic sealing member has a connecting edge for connecting the two first sealing parts, and the dynamic sealing structure further comprises a fixing ring, which is sleeved on the connecting edge.

15. A hub motor, characterized in that: include: The dynamic sealing structure according to any one of claims 1 to 14.

16. A wheel, characterized in that: include: The hub motor as claimed in claim 15.

17. A vehicle, characterized in that: include: The wheel of claim 16.

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