CN222351444U - Dynamic seal structure, in-wheel motor, wheel and vehicle - Google Patents

Abstract

The present disclosure relates to a dynamic seal structure for circumferentially disposing between a rotor and a stator of an electric machine, a hub electric machine, a wheel, and a vehicle, including a first seal assembly having one side for sealing mounting on one of the rotor or the stator and the opposite side for interference fit with the other of the rotor or the stator, and a second seal assembly for mounting on one of the rotor or the stator, the second seal assembly including a blocking member disposed outside of the first seal assembly. The first seal assembly of this disclosure is sealed to be installed on one of rotor or stator and with another of the two interference fit, forms first heavy seal, and the second seal assembly includes the barrier, and the barrier sets up in the outside of first seal assembly, forms the second heavy seal, adopts the mode of multiple seal to make this dynamic seal structure's sealed effect better.

Description

Dynamic seal structure, in-wheel motor, wheel and vehicle

Technical Field

The disclosure relates to the technical field of dynamic sealing, in particular to a dynamic sealing structure, a hub motor, a wheel and a vehicle.

Background

Because the hub motor is arranged in the wheel, is subjected to vibration impact for a long time and is exposed below the chassis, and faces to muddy water dust environment and severe working environment, the sealing requirement is severe, and the sealing effect is poor due to the fact that the related technology simply uses a heavy seal.

Disclosure of utility model

An object of the present disclosure is to provide a dynamic seal structure, an in-wheel motor, a wheel, and a vehicle, which can solve the above technical problems.

In order to achieve the above object, the present disclosure provides a dynamic seal structure for being circumferentially disposed between a rotor and a stator of an electric machine, the dynamic seal structure including a first seal assembly having one side for being sealingly mounted on one of the rotor or the stator and the opposite side for interference fit with the other of the rotor or the stator, and a second seal assembly for being mounted on one of the rotor or the stator, the second seal assembly including a blocking member disposed outside the first seal assembly.

Optionally, the rotor is rotatably connected to the outer side of the stator, the first seal assembly is mounted on the rotor and is used for interference fit with the axial surface of the stator, and the second seal assembly is mounted on the stator.

Optionally, the first seal assembly comprises a support and a first resilient seal connected to the support by vulcanization.

Optionally, the first resilient seal comprises a first seal portion having a cross-sectional configuration of a cone, the apex of which is for an interference fit with the axial face of the stator.

Optionally, a gap is provided between the barrier and the rotor to avoid friction between the barrier and the rotor.

Optionally, the first elastic sealing element further comprises a second sealing portion, one end of the second sealing portion extends towards the blocking element and is in interference fit with the blocking element, and the second sealing portion is obliquely arranged towards the direction of the rotor.

Optionally, the dynamic sealing structure further comprises a flexible blocking piece, the flexible blocking piece is arranged at the gap, one end of the flexible blocking piece is connected with the blocking piece, and the other end of the flexible blocking piece is in interference fit with the rotor.

Optionally, the first seal assembly is configured to be in an interference fit with the rotor and to rotate synchronously with the rotor.

Optionally, an end of the support member adjacent to the rotor extends in an axial direction of the stator to form a first fitting surface, and the first resilient seal further includes a third seal portion extending to a side of the first fitting surface adjacent to the rotor to sealingly connect the first seal assembly with the rotor.

Optionally, the second seal assembly is an interference fit with the stator.

Optionally, the second sealing component further includes a second assembling surface and a second elastic sealing element, the second assembling surface is disposed at one end of the blocking element, which is close to the stator, and extends along the axial direction of the stator, and the second elastic sealing element is connected with one side of the second assembling surface, which is close to the stator, through vulcanization, so that the second sealing component is in sealing connection with the stator.

Optionally, the second fitting surface is disposed between the first seal assembly and an axial surface of the stator and is connected to the barrier such that the first seal assembly is interference fit with the second fitting surface.

Optionally, 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 lubricating grease.

Optionally, the first elastic sealing element has a connecting edge for connecting the two first sealing parts, and the dynamic sealing structure further includes a fixing ring, and the fixing ring is sleeved on the connecting edge.

A second object of the present disclosure is to provide an in-wheel motor, including the above dynamic seal structure.

A third object of the present disclosure is to provide a wheel comprising the above-mentioned in-wheel motor.

A fourth object of the present disclosure is to provide a vehicle comprising a wheel as described above.

Through above-mentioned technical scheme, the dynamic seal structure that this disclosure provided is used for sealing the clearance between rotor and the stator, and first seal assembly seal installation is on one of rotor or stator two and with another one of the two interference fit, forms first heavy seal, and second seal assembly includes the barrier, and the barrier sets up in the outside of first seal assembly, forms the second heavy seal, adopts the mode of multiple seal to make this dynamic seal structure's sealed effect better.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a cross-sectional view of a hub motor of the present disclosure;

FIG. 2 is an enlarged view of a portion of one embodiment of FIG. 1;

FIG. 3 is an enlarged view of a portion of another embodiment of FIG. 1;

Fig. 4 is a cross-sectional view of a dynamic seal structure in the present disclosure.

Description of the reference numerals

1. The sealing device comprises a first sealing component, 11, a supporting piece, 111, a first assembling surface, 12, a first elastic sealing piece, 121, a first sealing part, 122, a second sealing part, 123, a third sealing part, 124, a connecting edge, 2, a second sealing component, 21, a blocking piece, 22, a second assembling surface, 23, a second elastic sealing piece, 3, a rotor, 4, a stator, 5, a flexible blocking piece, 6, a fixing ring, 7 and a gap.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, terms of orientation such as "inner and outer" are used to refer to inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first, second, third" and the like are used to distinguish one element from another element without order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

The present disclosure provides a dynamic seal structure for circumferential disposition between a rotor 3 and a stator 4 of an electric machine, the dynamic seal structure comprising a first seal assembly 1 having one side for sealing mounting on one of the rotor 3 or the stator 4 and the opposite side for interference fit with the other of the rotor 3 or the stator 4, and a second seal assembly 2 for mounting on one of the rotor 3 or the stator 4, the second seal assembly 2 comprising a barrier 21, the barrier 21 being disposed outside the first seal assembly 1.

Through above-mentioned technical scheme, the dynamic seal structure that this disclosure provided is used for sealing the clearance between rotor 3 and the stator 4, and dynamic seal structure circumference sets up, and dynamic seal structure sets up to the annular, and first seal assembly 1 seal mounting is on one of rotor 3 or stator 4 and with another interference fit in the two, forms first heavy seal, and second seal assembly 2 includes barrier 21, and barrier 21 sets up in the outside of first seal assembly 1, that is the direction that the dust got into, forms the second heavy seal, adopts the mode of multiple seal to make this dynamic seal structure's sealed effect better.

As an alternative embodiment, as shown in fig. 1-3, the rotor 3 is rotatably connected to the outer side 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 extending direction of the first sealing assembly 1 is the same as the direction of the centrifugal force generated when the rotor 3 rotates, and since the rotor 3 is arranged on the outer side of the stator 4, the pressing force of the axial surface of the first sealing assembly 1 and the axial surface of the stator 4 is reduced under the action of the centrifugal force, so that the abrasion of the first sealing assembly 1 can be reduced, and the service life can be prolonged. In other embodiments, the first seal assembly 1 may also be mounted on the stator 4, the second seal assembly 2 mounted on the rotor 3, and the first seal assembly 1 is in interference fit with the radial surface of the rotor 3. Of course, the first seal assembly 1 and the second seal assembly 2 may also be mounted on the same side, for example both on the rotor 3 or both on the stator 4.

As an alternative embodiment, as shown in fig. 2-4, the first sealing assembly 1 includes a support 11 and a first elastic sealing member 12, where the first elastic sealing member 12 is connected to the support 11 through vulcanization, the support 11 is a rigid member, and as a support skeleton, the first elastic sealing member 12 is made of rubber, for example, nitrile rubber, acrylate rubber, polyurethane rubber, silicone rubber, fluororubber, polytetrafluoroethylene resin, etc., and is sealed by using elasticity to form an interference fit with the stator 4.

Alternatively, as shown in fig. 4, the first elastic sealing member 12 includes a first sealing portion 121, a cross section of the first sealing portion 121 is configured as a cone, and an apex of the cone is used for interference fit with an axial surface of the stator 4, and the first sealing portion 121 is configured as a cone, so that a contact area with the stator 4 can be reduced, thereby reducing friction force to reduce wear of the first sealing portion 121 and the stator 4.

Optionally, as shown in fig. 4, two first sealing parts 121 are arranged at intervals along the axial direction of the stator 4, a sealing cavity is formed between the two first sealing parts 121 for filling grease, the grease can be filled between the two first sealing parts 121, the moving parts can be lubricated and cooled, the sealing abrasion is reduced, the service life is prolonged, the grease is pasty, and the grease can be smeared between the two first sealing parts 121 before the first sealing assembly 1 is installed.

Optionally, the first elastic sealing member 12 has a connecting edge 124 for connecting the two first sealing portions 121, the dynamic sealing structure further includes a fixing ring 6, and the fixing ring 6 is sleeved on the connecting edge 124, for example, the fixing ring 6 is provided with two, because the first sealing portions 121 are provided with two, and the connecting edge 124 is an elastic member, in order to make the first sealing portions 121 and the stator 4 in interference fit, the fixing ring 6 is used for compressing, so as to increase the compressing force between the first sealing portions 121 and the stator 4.

Optionally, as shown in fig. 2, a gap 7 is formed 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 and the rotor 3 are in direct contact with each other, the blocking member 21 and the rotor 3 will wear, so that the gap 7 is disposed between the blocking member 21 and the rotor 3, and since there is a gap 7, a small amount of foreign matters such as water and dust will enter, the width of the gap 7 is set smaller, for example, the width of the gap 7 is 0.5mm-1mm, and even if a small amount of foreign matters enter, the foreign matters such as water and dust can be thrown out from the gap 7 due to the centrifugal force when the motor rotates at high speed.

Optionally, as shown in fig. 4, the first elastic sealing member 12 further includes a second sealing portion 122, one end of the second sealing portion 122 extends toward the blocking member 21 and is in interference fit with the blocking member 21, the second sealing portion 122 is in interference fit with the blocking member 21 to form a third triple seal, dust entering from the gap 7 can be blocked, contact between the dust and the first sealing portion 121 is avoided, and abrasion of the first sealing portion 121 is reduced, and the second sealing portion 122 is inclined toward the rotor 3, so that a pressing force between the second sealing portion 122 and the blocking member 21 is reduced under the centrifugal force of the rotor 3, so that abrasion of the second sealing portion 122 is reduced.

In addition, as shown in fig. 3, the dynamic sealing structure further includes a flexible blocking member 5, the flexible blocking member 5 is disposed at the gap 7, one end of the flexible blocking member 5 is connected with the blocking member 21, and the other end is used for interference fit with the rotor 3, and the gap 7 is blocked by the flexible blocking member 5, so that dust can be prevented from entering from the gap 7, and at this time, the number of the second sealing portions 122 can be reduced, even the second sealing portions 122 are not disposed, for example, the flexible blocking member 5 is a felt. The flexible blocking piece 5 can be used for blocking the gap 7, and the rotation of the rotor 3 is not influenced by the flexible property of the flexible blocking piece.

In the first embodiment, the flexible sealing member 5 is provided, the second sealing portion 122 is not provided, and the slit 7 is sealed by the flexible sealing member 5;

In the second embodiment, the flexible blocking member 5 and the second sealing portion 122 are provided, and the number of the second sealing portions 122 can be reduced, for example, two second sealing portions 122 may be provided in normal cases, and one second sealing portion may be provided.

As an alternative embodiment, as shown in fig. 2-3, the first sealing assembly 1 is used for being in interference fit with the rotor 3 and synchronously rotating with the rotor 3, that is, the first sealing assembly 1 is detachably mounted on the motor, so that maintenance and replacement are convenient, the first sealing assembly 1 is in interference fit with the rotor 3 through the tension of the supporting piece 11, and the supporting piece 11 contacted with the rotor 3 is a rigid piece, and the first elastic sealing piece 12 contacted with the stator 4 is an elastic piece, so that the pressure between the first sealing assembly 1 and the rotor 3 is larger than the pressure between the first sealing assembly 1 and the stator 4, and therefore the first sealing assembly 1 can synchronously rotate with the rotor 3.

Alternatively, as shown in fig. 2 to 4, the end of the support 11 near the rotor 3 extends in the axial direction of the stator 4 to form the first fitting surface 111, the first elastic sealing member 12 further includes a third sealing portion 123, the third sealing portion 123 extends to a side of the first fitting surface 111 near the rotor 3 to sealingly connect the first sealing assembly 1 with the rotor 3, the support 11 has the first fitting surface 111, and the third sealing portion 123 is provided on the first fitting surface 111 to increase the contact area with the rotor 3, thereby increasing the sealing effect with the rotor 3, and at the same time, increasing friction with the rotor 3 by the interference of the support 11 and the elasticity of the third sealing portion 123 to prevent the first sealing assembly 1 from slipping off when rotating with the rotor 3.

As an alternative embodiment, as shown in fig. 2-4, the second sealing assembly 2 is in interference fit with the stator 4, and the second sealing assembly 2 is detachably mounted on the motor, so that maintenance and replacement are facilitated.

Optionally, as shown in fig. 4, the second sealing assembly 2 further includes a second assembling surface 22 and a second elastic sealing member 23, the second assembling surface 22 is disposed at an end of the blocking member 21 near the stator 4 and extends along an axial direction of the stator 4, the second elastic sealing member 23 is connected with a side of the second assembling surface 22 near the stator 4 through vulcanization, so that the second sealing assembly 2 is in sealing connection with the stator 4, the second sealing assembly 2 includes the second assembling surface 22, and the second elastic sealing member 23 is disposed on the second assembling surface 22, so that a contact area with the stator 4 is increased, thereby increasing a sealing effect with the stator 4, and an interference fit with the stator 4 is realized by using interference amounts of the blocking member 21 and the second assembling surface 22 and elasticity of the second elastic sealing member 23, and friction with the stator 4 is also increased, so that the second sealing assembly 2 is prevented from rotating.

Alternatively, as shown in fig. 2-3, the second assembling surface 22 is disposed between the axial surfaces of the first sealing component 1 and the stator 4 and is connected with the blocking member 21, so that the first sealing component 1 is in interference fit with the second assembling surface 22, the second assembling surface 22 also serves as a friction surface of the first sealing component 1, and when the rotor 3 rotates, the first sealing component 1 rubs against the second assembling surface 22, so that the first sealing component 1 can be prevented from directly rubbing against the stator 4, abrasion is caused to the stator 4, and only the second sealing component 2 needs to be replaced periodically, and the whole stator 4 does not need to be replaced.

As shown in fig. 1, a second object of the present disclosure is to provide an in-wheel motor, which includes the above dynamic sealing structure, where the dynamic sealing structure is used to seal a gap between a stator 4 and a rotor 3 of the in-wheel motor, and a multiple sealing manner is adopted to make the sealing effect of the dynamic sealing structure better.

A third object of the present disclosure is to provide a wheel, including the above-mentioned in-wheel motor, in which the in-wheel motor is installed in a hub of the wheel, so as to enhance a sealing effect of the wheel.

The fourth object of the present disclosure is to provide a vehicle, including the above wheel, to ensure the normal operation of the vehicle and to reduce the maintenance times of the vehicle.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (17)

1. A dynamic seal structure for circumferentially setting up between the rotor and the stator of motor, its characterized in that, dynamic seal structure includes:

A first seal assembly having one side for sealing mounting to one of the rotor or the stator and an opposite side for interference fit with the other of the rotor or the stator, and

A second seal assembly for mounting on one of the rotor or the stator, the second seal assembly comprising a barrier disposed outboard of the first seal assembly.

2. The dynamic seal structure of claim 1, wherein said rotor is rotatably coupled to an outer side of said stator, said first seal assembly being mounted on said rotor for interference engagement with an axial face of said stator, and said second seal assembly being mounted on said stator.

3. The dynamic seal structure of claim 2, wherein said first seal assembly includes a support and a first elastomeric seal, said first elastomeric seal being joined to said support by vulcanization.

4. A dynamic seal structure as claimed in claim 3, wherein said first resilient seal member includes a first seal portion having a cross-sectional configuration of a taper with an apex for interference fit with an axial face of said stator.

5. A dynamic seal structure as claimed in claim 3, wherein a gap is provided between said barrier and said rotor to avoid friction between said barrier and said rotor.

6. The dynamic seal structure of claim 5, wherein said first elastic seal further comprises a second seal portion, one end of said second seal portion extends toward and is interference fit with said blocking member, and said second seal portion is disposed obliquely toward said rotor.

7. The dynamic seal structure of claim 5 or 6, further comprising a flexible blocking member disposed at the gap, one end of the flexible blocking member being connected to the blocking member, the other end being adapted for interference fit with the rotor.

8. A dynamic seal structure as claimed in claim 3, wherein said first seal assembly is adapted for interference fit with and synchronous rotation with said rotor.

9. The dynamic seal structure of claim 8, wherein an end of said support member adjacent said rotor extends in an axial direction of said stator to form a first mating surface, said first resilient seal further comprising a third seal portion extending to a side of said first mating surface adjacent said rotor to sealingly connect said first seal assembly with said rotor.

10. The dynamic seal structure of claim 2, wherein said second seal assembly is an interference fit with said stator.

11. The dynamic seal structure of claim 10, wherein said second seal assembly further comprises a second fitting surface provided at an end of said barrier adjacent said stator and extending in an axial direction of said stator, and a second elastic seal member connected to a side of said second fitting surface adjacent said stator by vulcanization to sealingly connect said second seal assembly to said stator.

12. The dynamic seal structure of claim 11, wherein said second mating surface is disposed between said first seal assembly and an axial face of said stator and is coupled to said barrier such that said first seal assembly is interference fit with said second mating surface.

13. The dynamic seal structure according to claim 4, wherein two first seal portions are provided at intervals in an axial direction of the stator, and a seal cavity is formed between the two first seal portions for filling grease.

14. The dynamic seal structure of claim 13, wherein said first elastic seal member has a connecting edge for connecting two of said first seal portions, said dynamic seal structure further comprising a securing ring that is sleeved on said connecting edge.

15. An in-wheel motor comprising the dynamic seal structure according to any one of claims 1 to 14.

16. A wheel comprising the hub motor of claim 15.

17. A vehicle comprising a wheel according to claim 16.