WO2024103301A1 - 密封装置和内轮马达总成 - Google Patents

密封装置和内轮马达总成 Download PDF

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Publication number
WO2024103301A1
WO2024103301A1 PCT/CN2022/132322 CN2022132322W WO2024103301A1 WO 2024103301 A1 WO2024103301 A1 WO 2024103301A1 CN 2022132322 W CN2022132322 W CN 2022132322W WO 2024103301 A1 WO2024103301 A1 WO 2024103301A1
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Prior art keywords
sealing
sealing lip
radial
extension portion
sealing device
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PCT/CN2022/132322
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English (en)
French (fr)
Inventor
刘鑫
李定
蔡向阳
胡俊
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舍弗勒技术股份两合公司
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Priority to PCT/CN2022/132322 priority Critical patent/WO2024103301A1/zh
Publication of WO2024103301A1 publication Critical patent/WO2024103301A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports

Definitions

  • the present invention relates to the technical field of sealing, and in particular to a sealing device and an inner wheel motor assembly for dynamic sealing.
  • the inner wheel motor assembly for electric vehicles includes three systems: a reducer system, a motor system, and a brake system, with a wheel bearing disposed between the shaft and the reducer system.
  • the inner wheel motor assembly integrates the three systems into each wheel to save space.
  • the brake system is an external system and will come into contact with external dust or muddy water. If the splashing dust or muddy water enters the reducer system or wheel bearing, it will contaminate the grease and the gearbox reducer oil. Therefore, the reducer system and the brake system also need to be sealed.
  • the space of the inner wheel motor assembly that integrates multiple systems is very limited, so it is necessary to design a multifunctional sealing device with good sealing performance and space saving.
  • the present invention provides a sealing device and an inner wheel motor assembly.
  • An embodiment of the present invention provides a sealing device including: a rigid annular member, an annular elastic sealing body and an oil deflector ring.
  • the rigid annular member and the oil deflector ring are arranged opposite to each other in the radial direction, and the rigid annular member is located on the radial outer side of the oil deflector ring, and the elastic sealing body is arranged on the rigid annular member and extends radially inward.
  • the elastic sealing body includes a base, a first sealing lip and a second sealing lip; the base is arranged on the rigid annular member; the first sealing lip extends from the base toward the oil deflector ring and contacts the oil deflector ring; the second sealing lip extends from the base toward the radial inner side and exceeds the oil deflector ring.
  • the rigid annular member has a first axial extension portion extending in the axial direction and a first radial extension portion extending from one end of the first axial extension portion toward the radial inside
  • the oil retaining ring has a second axial extension portion extending in the axial direction and a second radial extension portion extending from one end of the second axial extension portion away from the first radial extension portion toward the radial outside.
  • the first sealing lip extends toward the second axial extension portion and contacts the second axial extension portion; the first sealing lip also includes a sub-sealing lip, which extends toward the second radial extension portion and contacts the second radial extension portion.
  • the sealing device further comprises an annular spring, which is arranged radially outside the first sealing lip and presses the first sealing lip radially inside.
  • the elastic sealing body further comprises a dustproof sealing lip, wherein the dustproof sealing lip extends from the base toward the radial inside and exceeds the oil deflector ring.
  • a plurality of dustproof sealing lips are provided.
  • a sealing paint layer is coated on a surface of the oil deflector ring facing away from the elastic sealing body.
  • the end portion of the first sealing lip in contact with the oil thrower ring is provided with a wear-resistant coating.
  • the elastic sealing body is made of rubber material.
  • the base, the first sealing lip and the second sealing lip are an integrally formed structure.
  • the present invention also provides an inner wheel motor assembly, comprising: a shaft, an outer ring, a wheel bearing, a reducer system, a motor system, a brake system and the sealing device as described above.
  • the outer ring and the wheel bearing are sleeved on the radial outer side of the shaft, and the reducer system, the motor system and the brake system are arranged on the outer ring.
  • the sealing device is arranged between the shaft, the outer ring and the wheel bearing; wherein the rigid annular member is fixed to the radial inner side of the outer ring, the oil retaining ring is fixed to the wheel bearing, and the second sealing lip of the elastic sealing body extends toward the radial inner side and contacts the radial outer side surface of the shaft, so that the sealing device forms a seal between the wheel bearing, the reducer system and the brake system.
  • the sealing device and inner wheel motor assembly provided by the embodiment of the present invention, by providing a first sealing lip for contact sealing with the oil retaining ring and a second sealing lip for contact sealing with the shaft on the elastic sealing body, multifunctional sealing of three or more areas can be achieved.
  • the first sealing lip further includes a sub-sealing lip for contact sealing with the first radial extension portion, which can further seal and block impurities such as oil or metal chips from the reducer system; a spring is provided on the radial outer side of the first sealing lip, so that the first sealing lip can further press the first radial extension portion and/or the first axial extension portion, thereby further improving the sealing effect.
  • the elastic sealing body is also provided with a plurality of dustproof sealing lips for contact sealing with the shaft, which can perform multiple sealing and blocking of external impurities such as dust and muddy water from the brake system.
  • the sealing device of the present invention is an integrated design that can achieve multi-zone sealing, saves space and cost for the inner wheel motor assembly, has stronger sealing performance, and can increase service life.
  • FIG1 shows a partial cross-sectional view of a sealing device according to an embodiment of the present invention
  • FIG2 shows a partial cross-sectional view of a sealing device according to yet another embodiment of the present invention.
  • FIG. 3 is a partial schematic diagram of an inner wheel motor assembly according to an embodiment of the present invention.
  • a sealing device is provided.
  • the sealing device is used to seal between various rotating parts that need to be sealed, for example, it can be installed between the outer ring and the inner ring of a bearing, and in particular, it is installed in an equipment system (such as an inner wheel motor assembly) that needs to perform multi-functional sealing for multiple areas.
  • the sealing device can seal lubricating oil, etc. inside, and block pollutants, such as muddy water, etc. outside.
  • FIG1 shows a partial cross-sectional view of a sealing device according to an embodiment of the present invention.
  • the sealing device 3 is annular and is installed in an annular space surrounded by two rotating parts and a bearing between the two rotating parts.
  • the two rotating parts are a shaft 1 and an outer ring 2.
  • the shaft 1, the outer ring 2 and the bearing are basically arranged around a common rotation axis and can rotate relative to each other around the rotation axis, wherein the outer ring 2 and the bearing are arranged radially outside the shaft 1.
  • the sealing device 3 comprises: a rigid annular member 31, an annular elastic sealing body 32 and an oil retaining ring 33.
  • the rigid annular member 31 is fixedly arranged on the outer ring 2, the rigid annular member 31 and the oil retaining ring 33 are arranged opposite to each other in the radial direction, and the rigid annular member 31 is located radially outside the oil retaining ring 33, and the elastic sealing body 32 is arranged on the rigid annular member 31 and extends radially inward.
  • the elastic sealing body 32 includes a base 321, a first sealing lip 322 and a second sealing lip 323.
  • the elastic sealing body 32 is made of an elastic material, such as a rubber material.
  • the base 321, the first sealing lip 322 and the second sealing lip 323 can be an integrally formed structure.
  • the base 321 is arranged on the rigid annular member 31; the first sealing lip 322 extends from the base 321 toward the oil retaining ring 33 and contacts and seals with the oil retaining ring 33; the second sealing lip 323 extends from the base 321 toward the radial inside and exceeds the oil retaining ring 33, and contacts and seals with the shaft 1.
  • the sealing device 3 is separated from the shaft 1 and the outer ring 2 by three spatial regions: a first region S1 formed between the outer side of the oil retaining ring 33 of the sealing device 3 and the shaft 1, a second region S2 formed between one side of the sealing device 3 and the outer ring 2, and a third region S3 formed between the other side of the sealing device 3 and the shaft 1 and the outer ring 2.
  • the first region S1 can accommodate, for example, a bearing, and the lubricating oil from the bearing can be sealed by the first sealing lip 322 that is in contact and sealed with the oil retaining ring 33 and the second sealing lip 323 that is in contact and sealed with the shaft 1;
  • the second region S2 can accommodate, for example, a reducer system, and the oil from the reducer system can be sealed by the first sealing lip 322 that is in contact and sealed with the oil retaining ring 33;
  • the third region S3 can accommodate, for example, a brake system, and dust or muddy water from outside the brake system can be blocked by the second sealing lip 323 that is in contact and sealed with the shaft 1.
  • the sealing device 3 as described above can realize multifunctional sealing of the three regions.
  • the rigid annular member 31 can be made of metal or other plastic material with sufficient rigidity, so that the rigid annular member 31 can meet the rigidity requirements and provide structural support for the elastic sealing body 32.
  • the rigid annular member 31 can be conveniently formed into various required shapes by injection molding.
  • the rigid annular member 31 can be rigidly connected to the outer ring 2 by, for example, interference fit.
  • the rigid annular member 31 has a first axial extension portion 311 extending in the axial direction and a first radial extension portion 312 extending from one end of the first axial extension portion 311 toward the radial inside
  • the oil retaining ring 33 has a second axial extension portion 331 extending in the axial direction and a second radial extension portion 332 extending from one end of the second axial extension portion 331 away from the first radial extension portion 312 toward the radial outside.
  • the first axial extension portion 311 and the second axial extension portion 331 are arranged opposite to each other in the radial direction, and the first radial extension portion 312 and the second radial extension portion 332 are arranged opposite to each other in the axial direction, so that the rigid annular member 31 and the oil retaining ring 33 generally enclose an annular internal space.
  • the first sealing lip 322 is located in the internal space, and the second sealing lip 323 is located outside the internal space and contacts the shaft 1 further inside.
  • Fig. 2 shows a partial cross-sectional view of a sealing device according to another embodiment of the present invention.
  • the first sealing lip 322 extends toward the second axial extension portion 331 and contacts the second axial extension portion 331.
  • the first sealing lip 322 also includes a sub-sealing lip 3221, which extends toward the second radial extension portion 332 and contacts the second radial extension portion 332.
  • the sub-sealing lip 3221 may extend from any part of the first sealing lip 322 and contact the second radial extension portion 332.
  • the sub-sealing lip 3221 may extend from one end of the first sealing lip 322 contacting the second axial extension portion 331 toward the second radial extension portion 332 and contact the second radial extension portion 332, so as to provide a spring for the first sealing lip 322.
  • the sealing device 3 further includes an annular spring 34, which is arranged on the radially outer side of the first sealing lip 322 and presses the first sealing lip 322 radially inward.
  • the spring 34 is located at the turning point of the main body of the first sealing lip 322 to the sub-sealing lip 3221, so that the spring 34 can simultaneously press the part of the first sealing lip 322 in contact with the second axial extension portion 331 and the part of the sub-sealing lip 3221 in contact with the second radial extension portion 332, thereby improving the sealing effect.
  • the elastic sealing body 32 further includes a dustproof sealing lip 324.
  • the dustproof sealing lip 324 extends from the base 321 toward the radial inside and exceeds the oil retaining ring 33.
  • the dustproof sealing lip 324 is in sealing contact with the shaft 1.
  • the dustproof sealing lip 324 can further block and seal dust or muddy water from the third area S3, and prevent impurities from entering the first area S1 and the second area S2 from the third area S3.
  • the dustproof sealing lip 324 can be provided in plurality. For example, as shown in Figures 1 and 2, the dustproof sealing lip 324 is provided with three, which can block impurities from the third area S3 in multiple ways.
  • the oil deflector 33 is connected to the bearing.
  • the surface of the oil deflector 33 in contact with the bearing that is, the surface of the oil deflector 33 facing away from the elastic sealing body 32, is coated with a sealing paint layer 333.
  • the end of the first sealing lip 322 in contact with the oil retaining ring 33 is provided with a wear-resistant coating 3222.
  • the wear-resistant coating 3222 is made of polytetrafluoroethylene (PTFE). PTFE has good wear resistance, can reduce the friction coefficient and friction torque on the surface of the first sealing lip 322, and improve the sealing performance of the sealing device.
  • FIG3 shows a partial schematic diagram of an inner wheel motor assembly according to an embodiment of the present invention.
  • the inner wheel motor assembly includes a shaft 1, an outer ring 2, a wheel bearing 4, a reducer system 5, a motor system 6, a brake system 7 and a sealing device 3 according to any one of the above embodiments.
  • the outer ring 2 and the wheel bearing 4 are sleeved on the radial outer side of the shaft 1, and the reducer system 5, the motor system 6 and the brake system 7 are arranged on the outer ring 2.
  • the sealing device 3 is arranged in the annular space between the shaft 1, the outer ring 2 and the wheel bearing 4.
  • the rigid annular member 31 is fixed to the radial inner side of the outer ring 2, the oil retaining ring 33 is fixed to the wheel bearing 4, and the second sealing lip 323 of the elastic sealing body 32 extends toward the radial inner side and contacts the radial outer side surface of the shaft 1.
  • the wheel bearing 4 is located in the first area S1
  • the reducer system 5 is located in the second area S2
  • the brake system 7 is located in the third area S3, so that the sealing device 3 forms a seal between the wheel bearing 4, the reducer system 5 and the brake system 7.
  • the present invention aims to improve the structure of the sealing device, so the technical solution of the present invention can be applied to various devices or systems that require sealing, and is not limited to the inner wheel motor assembly shown in the embodiment.
  • the number, shape and arrangement of the first sealing lip, the second sealing lip and the dustproof sealing lip are not limited to the limitations in the above description.
  • the present invention can also be applied to other non-annular structures for dynamic sealing devices.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)

Abstract

一种密封装置和内轮马达总成，其中，密封装置包括刚性环形件（31）、环形的弹性密封体（32）和挡油环（33）；其中，刚性环形件（31）与挡油环（33）在径向方向上相对设置，且刚性环形件（31）位于挡油环（33）的径向外侧，弹性密封体（32）设置在刚性环形件（31）上并且朝向径向内侧延伸；弹性密封体（32）包括基部（321）、第一密封唇（322）和第二密封唇（323）；其中，基部（321）设置在刚性环形件（31）上；第一密封唇（322）由基部（321）朝向挡油环（33）延伸，并与挡油环（33）接触；第二密封唇（323）由基部（321）朝向径向内侧延伸并超过挡油环（33）。采用该密封装置可对三个或更多区域进行多功能密封，为内轮马达总成节省空间和成本，密封性能更强，并能增加使用寿命。

Description

密封装置和内轮马达总成 技术领域
本发明涉及密封技术领域。具体地，本发明涉及一种用于动态密封的密封装置和内轮马达总成。
背景技术
在汽车密封技术领域中，用于电动汽车的内轮马达总成包括3个***：减速器***、电机***和制动***，轴和减速器***之间设置有轮轴承。内轮马达总成为节省空间，将3个***集成到每个车轮中。
在轮轴承内部有密封圈来密封轮轴承内部的润滑脂。而制动***为外接***，会与外部的尘土或泥水接触，如果飞溅的尘土或泥水进入减速器***或轮轴承，会污染润滑脂和变速箱减速器机油。因此还需要对减速器***和制动***进行密封处理。但是集成有多个***的内轮马达总成的空间非常有限，因此需要设计一种密封性能良好，而又能节省空间的多功能密封装置。
发明内容
为解决以上技术问题，本发明提供一种密封装置和内轮马达总成。
本发明的实施例提供了一种密封装置包括：刚性环形件、环形的弹性密封体和挡油环。其中，所述刚性环形件与挡油环在径向方向上相对设置，且所述刚性环形件位于所述挡油环的径向外侧，所述弹性密封体设置在所述刚性环形件上并且朝向径向内侧延伸。所述弹性密封体包括基部、第一密封唇和第二密封唇；其中，所述基部设置在所述刚性环形件上；所述第一密封唇由所述基部朝向所述挡油环延伸，并与所述挡油环接触；所述第二密封唇由所述基部朝向径向内侧延伸并超过所述挡油环。
根据本发明的一个实施例，所述刚性环形件具有沿轴向方向延伸的第 一轴向延伸部以及从所述第一轴向延伸部一端朝向径向内侧延伸的第一径向延伸部，所述挡油环具有沿轴向方向延伸的第二轴向延伸部以及从所述第二轴向延伸部远离所述第一径向延伸部的一端朝向径向外侧延伸的第二径向延伸部。所述第一密封唇朝向所述第二轴向延伸部延伸，并与所述第二轴向延伸部接触；所述第一密封唇还包括子密封唇，所述子密封唇朝向所述第二径向延伸部延伸，并与所述第二径向延伸部接触。
根据本发明的一个实施例，所述密封装置还包括环形的弹簧，所述弹簧设置在所述第一密封唇的径向外侧并且向径向内侧挤压所述第一密封唇。
根据本发明的一个实施例，所述弹性密封体还包括防尘密封唇，所述防尘密封唇由所述基部朝向径向内侧延伸并超过所述挡油环。
根据本发明的一个实施例，所述防尘密封唇设置有多个。
根据本发明的一个实施例，所述挡油环背向所述弹性密封体一侧的表面涂覆有密封漆层。
根据本发明的一个实施例，所述第一密封唇的与所述挡油环接触的端部设置有耐磨涂层。
根据本发明的一个实施例，所述弹性密封体由橡胶材料制成。
根据本发明的一个实施例，所述基部、所述第一密封唇和所述第二密封唇为一体成型结构。
本发明还提供一种内轮马达总成，包括：轴、外圈、轮轴承、减速器***、电机***、制动***和如上所述的密封装置。所述外圈和所述轮轴承套设于所述轴的径向外侧，所述减速器***、电机***和制动***设置在所述外圈上。所述密封装置设置在所述轴、所述外圈和所述轮轴承之间；其中，所述刚性环形件固定于所述外圈的径向内侧，所述挡油环固定于所述轮轴承上，所述弹性密封体的第二密封唇朝向径向内侧延伸，并与所述轴的径向外侧表面接触，以使所述密封装置对所述轮轴承、所述减速器***和所述制动***各部分之间形成密封。
根据本发明的实施例提供的密封装置及内轮马达总成，通过在所述弹性密封体上设置与挡油环接触密封的第一密封唇和与轴接触密封的第二密封唇，能够实现对三个或更多区域进行多功能密封。并且，第一密封唇还进一步包括与第一径向延伸部接触密封的子密封唇，能够进一步密封阻挡来自减速器***的机油或金属屑等杂质；第一密封唇的径向外侧设置有弹簧，使得第一密封唇能够进一步朝向压紧第一径向延伸部和/或第一轴向延伸部，从而使密封效果得到进一步提高。此外，所述弹性密封体还设置了与轴接触密封的多个防尘密封唇，能够对来自制动***的尘土和泥水等外界杂质进行多重的密封和阻挡。本发明的密封装置是能够实现多区域密封的一体化设计，为内轮马达总成节省空间和成本，密封性能更强，并且能够增加使用寿命。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出根据本发明的实施例的密封装置的局部剖视图；
图2示出根据本发明的又一实施例的密封装置的局部剖视图；以及
图3示出根据本发明的实施例的内轮马达总成的局部示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。
根据本发明的实施例，提供了一种密封装置。所述密封装置用于在各种需要密封的转动部件之间进行密封，例如可以安装在轴承的外圈与内圈 之间，特别是安装在需要针对多区域进行多功能密封的设备***(例如内轮马达总成)中。所述密封装置能够将例如润滑油等密封在内部，并将污染物例如泥水等阻挡在外部。
图1示出根据本发明的实施例的密封装置的局部剖视图。如图1所示，所述密封装置3为环形，所述密封装置3安装在两个转动部件以及所述两个转动部件之间的轴承所围成的环形空间中。在一些实施例中，所述两个转动部件为轴1与外圈2。所述轴1、外圈2以及轴承基本围绕共同的转动轴线设置并且可以围绕转动轴线相对转动，其中，所述外圈2和轴承套设与轴1的径向外侧。
具体地，所述密封装置3包括：刚性环形件31、环形的弹性密封体32和挡油环33。其中，所述刚性环形件31固定设置在所述外圈2上，所述刚性环形件31与挡油环33在径向方向上相对设置，且所述刚性环形件31位于所述挡油环33的径向外侧，所述弹性密封体32设置在所述刚性环形件31上并且朝向径向内侧延伸。
进一步地，所述弹性密封体32包括基部321、第一密封唇322和第二密封唇323。所述弹性密封体32由弹性材料，例如橡胶材料制成。所述基部321、所述第一密封唇322和所述第二密封唇323可以为一体成型结构。所述基部321设置在所述刚性环形件31上；所述第一密封唇322由所述基部321朝向所述挡油环33延伸，并与所述挡油环33接触密封；所述第二密封唇323由所述基部321朝向径向内侧延伸并超过所述挡油环33，并与所述轴1接触密封。
所述密封装置3与所述轴1和外圈2分隔出3个空间区域：所述密封装置3的挡油环33的外侧与所述轴1之间形成的第一区域S1、所述密封装置3的一侧与外圈2之间形成的第二区域S2以及所述密封装置3的另一侧与所述轴1和外圈2之间形成的第三区域S3。其中，所述第一区域S1能够容纳例如轴承，则来自轴承的润滑油能够由与述挡油环33接触密封的第一密封唇322以及与所述轴1接触密封的第二密封唇323密封；所述第二区域S2能够容纳例如减速器***，则来自减速器***的机油能够由与述挡油环33接触密封的第一密封唇322密封；所述第三区域S3能够容 纳例如制动***，则来自制动***之外的灰尘或泥水能够由与所述轴1接触密封的第二密封唇323阻挡。根据如上所述的密封装置3能够实现对三个区域进行多功能密封。
所述刚性环形件31可以由金属或其他具有足够刚度的塑料材料制成，以使所述刚性环形件31能够满足刚度的需求，可以为弹性密封体32提供结构支撑。所述刚性环形件31可以通过注塑成型来方便地形成各种需要的形状。所述刚性环形件31可以通过例如过盈配合的方式与外圈2刚性连接。
在一些可选地实施例中，所述刚性环形件31具有沿轴向方向延伸的第一轴向延伸部311以及从所述第一轴向延伸部311一端朝向径向内侧延伸的第一径向延伸部312，所述挡油环33具有沿轴向方向延伸的第二轴向延伸部331以及从所述第二轴向延伸部331远离所述第一径向延伸部312的一端朝向径向外侧延伸的第二径向延伸部332。
如图1所示，所述第一轴向延伸部311与所述第二轴向延伸部331在径向方向上相对设置，所述第一径向延伸部312与第二径向延伸部332在轴向方向上相对设置，这样，所述刚性环形件31和挡油环33大体合围出一个环形的内部空间。所述第一密封唇322位于所述内部空间中，而第二密封唇323位于所述内部空间之外与更加内侧的轴1接触。
进一步地，图2示出根据本发明的又一实施例的密封装置的局部剖视图。如图2所示，所述第一密封唇322朝向所述第二轴向延伸部331延伸，并与所述第二轴向延伸部331接触。所述第一密封唇322还包括子密封唇3221，所述子密封唇3221朝向所述第二径向延伸部332延伸，并与所述第二径向延伸部332接触。
可选地，所述子密封唇3221可以由第一密封唇322的任意部位延伸出并与所述第二径向延伸部332接触。优选地，如图2所示，所述子密封唇3221可以由第一密封唇322的与第二轴向延伸部331接触的一端转而朝向第二径向延伸部332延伸并与所述第二径向延伸部332接触，以便于对所述第一密封唇322设置弹簧。
具体地，如图1和2所示，所述密封装置3还包括环形的弹簧34，所 述弹簧34设置在所述第一密封唇322的径向外侧并且向径向内侧挤压所述第一密封唇322。特别如图2所示，所述弹簧34位于所述第一密封唇322的主体部分向所述子密封唇3221的转弯处，使得所述弹簧34能够同时将所述第一密封唇322与第二轴向延伸部331接触的部分以及子密封唇3221与所述第二径向延伸部332接触的部分压紧，从而提高密封效果。
在一些可选地实施例中，所述弹性密封体32还包括防尘密封唇324。所述防尘密封唇324由所述基部321朝向径向内侧延伸并超过所述挡油环33。所述防尘密封唇324与所述轴1密封接触。所述防尘密封唇324能够进一步对来自于第三区域S3的尘土或泥水等进行阻挡密封，避免杂质从第三区域S3进入第一区域S1和第二区域S2。为了进一步提升密封装置3的密封效果，所述防尘密封唇324可以设置有多个，例如图1和2中所示，所述防尘密封唇324设置有3个，能够多重阻挡来自第三区域S3的杂质。
在一些可选地实施例中，所述挡油环33连接于轴承。为避免来自第二区域S2的机油等杂质从挡油环33与轴承之间的缝隙进入第一区域S1，即进入轴承中，或避免来自第一区域S1的润滑油等杂质从挡油环33与轴承之间的缝隙进入第一区域S1，例如进入减速器***中，因此需要对轴承与挡油环33之间进行密封。所述挡油环33与所述轴承接触的表面，即所述挡油环33背向所述弹性密封体32一侧的表面涂覆有密封漆层333。
参见图1和图2所示，所述第一密封唇322的与所述挡油环33接触的端部设置有耐磨涂层3222。所述耐磨涂层3222由聚四氟乙烯(PTFE)材料制成。PTFE具有良好的耐磨性，能够降低所述第一密封唇322表面的摩擦系数和摩擦力矩，提高密封装置的密封性能。
根据本发明的实施例，还提供了一种内轮马达总成。图3示出根据本发明的实施例的内轮马达总成的局部示意图。如图3所示，所述内轮马达总成包括轴1、外圈2、轮轴承4、减速器***5、电机***6、制动***7和如上所述实施例中任一项所述的密封装置3。所述外圈2和所述轮轴承4套设于所述轴1的径向外侧，所述减速器***5、电机***6和制动***7设置在所述外圈2上。
所述密封装置3设置在所述轴1、所述外圈2和所述轮轴承4之间的环形空间内。所述刚性环形件31固定于所述外圈2的径向内侧，所述挡油环33固定于所述轮轴承4上，所述弹性密封体32的第二密封唇323朝向径向内侧延伸，并与所述轴1的径向外侧表面接触。这样，所述轮轴承4位于第一区域S1内，所述减速器***5位于第二区域S2内，所述制动***7位于第三区域S3内，进而使所述密封装置3对所述轮轴承4、所述减速器***5和所述制动***7各部分之间形成密封。
需要注意的是，本发明旨在对密封装置的结构进行改进，因此本发明的技术方案可以适用于各种需要密封的装置或***中，而不限于实施例中示出的内轮马达总成。对于第一密封唇、第二密封唇、防尘密封唇的数量、形状以及布置方式，可以不限于上述描述中的限定。此外，本发明也可以适用于其他非环形结构的用于动态密封的装置。
虽然在上述说明中示例性地描述了可能的实施例，但是应当理解到，仍然通过所有已知的和此外技术人员容易想到的技术特征和实施方式的组合存在大量实施例的变化。此外还应该理解到，示例性的实施方式仅仅作为一个例子，这种实施例绝不以任何形式限制本发明的保护范围、应用和构造。通过前述说明更多地是向技术人员提供一种用于转化至少一个示例性实施方式的技术指导，其中，只要不脱离权利要求书的保护范围，便可以进行各种改变，尤其是关于所述部件的功能和结构方面的改变。
附图标记表
1.轴；
2.外圈；
3.密封装置；31.第一径向延伸部；311.第一轴向延伸部；312.第一径向延伸部；32.弹性密封体；321.基部；322.第一密封唇；3221.子密封唇；3222.耐磨涂层；323.第二密封唇；324.防尘密封唇；33.；331.第二轴向延伸部；332.第二径向延伸部；333.挡油环；34.弹簧；
4.轮轴承；
5.减速器***；
6.电机***；
7.制动***；
S1.第一区域；S2.第二区域；S3.第三区域。

Claims (10)

  1. 一种密封装置，包括刚性环形件(31)、环形的弹性密封体(32)和挡油环(33)；其中，所述刚性环形件(31)与挡油环(33)在径向方向上相对设置，且所述刚性环形件(31)位于所述挡油环(33)的径向外侧，所述弹性密封体(32)设置在所述刚性环形件(31)上并且朝向径向内侧延伸；
    其特征在于
    所述弹性密封体(32)包括基部(321)、第一密封唇(322)和第二密封唇(323)；其中，所述基部(321)设置在所述刚性环形件(31)上；所述第一密封唇(322)由所述基部(321)朝向所述挡油环(33)延伸，并与所述挡油环(33)接触；所述第二密封唇(323)由所述基部(321)朝向径向内侧延伸并超过所述挡油环(33)。
  2. 根据权利要求1所述的密封装置，其特征在于，
    所述刚性环形件(31)具有沿轴向方向延伸的第一轴向延伸部(311)以及从所述第一轴向延伸部(311)一端朝向径向内侧延伸的第一径向延伸部(312)，所述挡油环(33)具有沿轴向方向延伸的第二轴向延伸部(331)以及从所述第二轴向延伸部(331)远离所述第一径向延伸部(312)的一端朝向径向外侧延伸的第二径向延伸部(332)；
    所述第一密封唇(322)朝向所述第二轴向延伸部(331)延伸，并与所述第二轴向延伸部(331)接触；所述第一密封唇(322)还包括子密封唇(3221)，所述子密封唇(3221)朝向所述第二径向延伸部(332)延伸，并与所述第二径向延伸部(332)接触。
  3. 根据权利要求1所述的密封装置，其特征在于，所述密封装置(3)还包括环形的弹簧(34)，所述弹簧(34)设置在所述第一密封唇(322)的径向外侧并且向径向内侧挤压所述第一密封唇(322)。
  4. 根据权利要求1所述的密封装置，其特征在于，所述弹性密封体(32)还包括防尘密封唇(324)，所述防尘密封唇(324)由所述基部(321)朝向径向内侧延伸并超过所述挡油环(33)。
  5. 根据权利要求4所述的密封装置，其特征在于，所述防尘密封唇(324)设置有多个。
  6. 根据权利要求1所述的密封装置，其特征在于，所述挡油环(33)背向所述弹性密封体(32)一侧的表面涂覆有密封漆层(333)。
  7. 根据权利要求1所述的密封装置，其特征在于，所述第一密封唇(322)的与所述挡油环(33)接触的端部设置有耐磨涂层(3222)。
  8. 根据权利要求1所述的密封装置，其特征在于，所述弹性密封体(32)由橡胶材料制成。
  9. 根据权利要求1所述的密封装置，其特征在于，所述基部(321)、所述第一密封唇(322)和所述第二密封唇(323)为一体成型结构。
  10. 一种内轮马达总成，包括轴(1)、外圈(2)、轮轴承(4)、减速器***(5)、电机***(6)、制动***(7)和如权利要求1-9中任一项所述的密封装置(3)；
    其中，所述外圈(2)和所述轮轴承(4)套设于所述轴(1)的径向外侧，所述减速器***(5)、电机***(6)和制动***(7)设置在所述外圈(2)上，
    所述密封装置(3)设置在所述轴(1)、所述外圈(2)和所述轮轴承(4)之间；其中，所述刚性环形件(31)固定于所述外圈(2)的径向内侧，所述挡油环(33)固定于所述轮轴承(4)上，所述弹性密封体 (32)的第二密封唇(323)朝向径向内侧延伸，并与所述轴(1)的径向外侧表面接触，以使所述密封装置(3)对所述轮轴承(4)、所述减速器***(5)和所述制动***(7)各部分之间形成密封。
PCT/CN2022/132322 2022-11-16 2022-11-16 密封装置和内轮马达总成 WO2024103301A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398942A (en) * 1992-09-02 1995-03-21 Dana Corporation Annular lubricant seal assembly
CN102939207A (zh) * 2010-03-30 2013-02-20 Ntn株式会社 结合有轮内马达的车轮轴承装置
CN104220768A (zh) * 2012-04-13 2014-12-17 Ntn株式会社 车轮轴承用密封装置
CN107923540A (zh) * 2015-09-01 2018-04-17 Nok株式会社 密封装置
CN113606341A (zh) * 2021-07-28 2021-11-05 舍弗勒技术股份两合公司 密封装置
CN113653801A (zh) * 2021-08-12 2021-11-16 舍弗勒技术股份两合公司 密封装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398942A (en) * 1992-09-02 1995-03-21 Dana Corporation Annular lubricant seal assembly
CN102939207A (zh) * 2010-03-30 2013-02-20 Ntn株式会社 结合有轮内马达的车轮轴承装置
CN104220768A (zh) * 2012-04-13 2014-12-17 Ntn株式会社 车轮轴承用密封装置
CN107923540A (zh) * 2015-09-01 2018-04-17 Nok株式会社 密封装置
CN113606341A (zh) * 2021-07-28 2021-11-05 舍弗勒技术股份两合公司 密封装置
CN113653801A (zh) * 2021-08-12 2021-11-16 舍弗勒技术股份两合公司 密封装置

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