WO2020073886A1 - 用于马达的轴承室结构 - Google Patents

用于马达的轴承室结构 Download PDF

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Publication number
WO2020073886A1
WO2020073886A1 PCT/CN2019/109937 CN2019109937W WO2020073886A1 WO 2020073886 A1 WO2020073886 A1 WO 2020073886A1 CN 2019109937 W CN2019109937 W CN 2019109937W WO 2020073886 A1 WO2020073886 A1 WO 2020073886A1
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Prior art keywords
bearing
motor
chamber structure
rotor shaft
output gear
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PCT/CN2019/109937
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English (en)
French (fr)
Inventor
龚红宇
冯臣
朱建强
陈家辉
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广东肇庆爱龙威机电有限公司
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Application filed by 广东肇庆爱龙威机电有限公司 filed Critical 广东肇庆爱龙威机电有限公司
Priority to EP19870538.6A priority Critical patent/EP3866311A4/en
Publication of WO2020073886A1 publication Critical patent/WO2020073886A1/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/40—Shaping by deformation without removing material
    • F16C2220/42—Shaping by deformation without removing material by working of thin-walled material such as sheet or tube
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • F16C2380/27—Motor coupled with a gear, e.g. worm gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports

Definitions

  • the utility model relates to the field of motors, and more particularly relates to a bearing chamber structure of a motor especially used in an impact environment.
  • the housing or end cover structure of these motors includes a bearing chamber structure for accommodating the bearings of the rotor shaft.
  • the bearing housing of the bearing chamber structure is usually formed integrally with the motor housing.
  • the bearing chamber structure in the prior art includes a bearing housing that defines a chamber that houses a bearing for a rotor shaft, and the bearing housing is provided with an opening through which one end of the rotor shaft passes. The end is coupled to the output gear outside the chamber to transmit power.
  • the output gear coupled to one end of the rotor shaft often has an axial movement, which generates a large impact force in the axial direction, and this axial
  • the impact force (especially the impact force in the direction of the motor components) is mainly borne by the bearing in the prior art bearing chamber structure design, but the pull-out force due to the bearing press fitting in the bearing chamber is far from meeting the axial impact of the gear Force, it is very easy to eventually damage the motor.
  • the motor housing, the output gear and the bearing are usually made of metal materials, so during the rotation of the output gear, when there is the above-mentioned axial movement and axial impact force, the output gear and the bearing or Contact and collision will occur between the output gear and the housing, resulting in greater noise from the motor during operation, causing discomfort to motor users.
  • the utility model is proposed based on such a background, and its purpose is to provide a new type of bearing chamber structure for the motor, so that the motor housing can withstand greater axial forces in the axial direction, thereby making the output gear Can withstand greater axial impact forces, reduce potential risks, improve the pass rate of the motor, and at the same time reduce the operating noise of the motor as much as possible.
  • the bearing chamber structure for a motor includes a bearing shell integrally formed with a motor housing, the bearing shell defines a cavity for accommodating a bearing mounted on the rotor shaft against the shoulder of the rotor shaft And received in the chamber, one end of the rotor shaft protrudes outward through the central opening of the bearing shell and is coupled with an output gear to output power, wherein the bearing shell includes The flange portion between the gear and the bearing.
  • the bearing shell and the motor housing are integrally stamped and formed, and the flange portion is formed by stamping in a direction opposite to the molding direction of the bearing shell.
  • the flange portion sinks relative to the axially outermost edge of the bearing shell to define a cavity.
  • a first washer and a second washer are stacked between the output gear and the flange portion.
  • the first washer is tightly fitted with the rotor shaft
  • the second washer is tightly fitted with the radially inner wall of the bearing housing that defines the cavity.
  • the first gasket and the second gasket are made of plastic material.
  • the use of the bearing chamber structure for the motor according to the present invention greatly improves the axial impact force that the motor can withstand, improves the operation stability of the motor, and reduces noise during operation.
  • FIG. 1 shows a structure of a bearing chamber for a motor in the prior art in a cross-sectional view
  • FIG. 2 shows an exemplary bearing chamber structure for a motor according to the present invention in a cross-sectional view
  • Fig. 3 shows, in a cross-sectional view, an exemplary bearing chamber structure for a motor according to the new model of the present invention assembled with bearings, a rotor shaft, and an output gear.
  • FIG. 1 In view of the shortcomings of the structure of the bearing chamber for the motor in the prior art as shown in FIG. 1 mentioned in the background section, a new type, which can be better adapted to, for example, the closing of the door and the tail door of the car Motor housing structure for lifting and other environments.
  • 2 and 3 respectively show, in a cross-sectional view, a bearing chamber structure for a motor according to an embodiment of the present invention and the bearing chamber structure assembled with bearings, a rotor shaft, and an output gear.
  • the impact resistance of the motor is required to be high.
  • the output gear is prone to oscillate in the axial direction during rotation and generates a great axial impact force.
  • This impact force is mainly caused by the rotor shaft in the known motor housing design.
  • the bearing bears, however, the bearing often fails to resist such an axial impact force, so that the force is finally transmitted to the components of the motor, and eventually the motor is damaged.
  • the bearing chamber structure 1 includes a bearing shell integrally formed with the motor housing 9, especially an integral stamping, the bearing shell defines a cavity 3 for accommodating the bearing 2, which bears against the rotor
  • the shoulder 5 of the shaft 4 is mounted on the rotor shaft 4 and received in the chamber 3, one end of the rotor shaft 4 protrudes outward through the central opening 6 of the bearing shell and is coupled with the output gear 7 to output power .
  • the bearing chamber structure 1 advantageously includes an additional load-bearing structure provided between the output gear 7 and the bearing 2, which is preferably integrally formed on the motor housing 9 so that it can be effectively To bear the axial impact force from the output gear.
  • the load-bearing structure includes a flange portion 8 punched out in a direction opposite to the forming direction of the bearing shell, and the flange portion 8 is sandwiched between the output gear 7 and the bearing 2 It can be used as the above additional load-bearing structure.
  • the output gear 7 is located above the flange portion 8, so that it helps the motor housing 9 to withstand as much axial impact force from the output gear 7 as possible by the flange portion 8, thereby avoiding the bearing 2 from being able to withstand the impact force Eventually cause damage to the motor components.
  • other forms of load-bearing structures capable of achieving the above-mentioned functions and purposes are also possible.
  • the flange portion 8 sinks relative to the axially outermost edge 13 of the bearing shell to define the cavity 10.
  • two gaskets 11 and 12 preferably made of plastic material.
  • a larger number of gasket-like structures can also be arranged.
  • the first washer 11 and the rotor shaft 4 are provided in tight fit, so that the first washer 11 can rotate together with the rotor shaft 4 and the output gear 7.
  • the second gasket 12 is tightly fitted with the radial inner wall of the bearing shell defining the cavity 10, so that the output gear 7 rotates only between the first gasket 11 and the second gasket 12 made of plastic material Friction or collision occurs between them, so as to avoid direct contact between the output gear 7 made of metal material and the motor housing 9, thereby greatly reducing the noise of the motor during operation.
  • the motor housing 9 is usually formed in one piece with the bearing housing. According to a specific embodiment, a part of the motor housing is stamped into the bearing chamber structure 1 for the rotor shaft 4 by means of a stamping die upward in the axial direction (ie in a direction away from the housing cavity housing the motor components). Then, the stamping die is reused and punched downward in the axial direction by means of a punch, that is, in the reverse direction, so that the sunken flange portion 8 is formed to serve as an additional bearing structure between the output gear 7 and the bearing 2 And a cavity 10 for arranging plastic gaskets is provided.
  • the output gear is usually press-fitted after the two plastic gaskets stacked one above the other are installed. By replacing the direct contact between the output gear and the metal housing by means of the contact between the two plastic gaskets, The purpose of noise reduction.
  • the axial impact force of the gear that the motor can withstand can be greatly increased without adopting other additional process costs.
  • the structure of the housing bearing chamber formed by reverse stamping is easy to process, can be adapted to a variety of different size motors, and has good structural stability.
  • the motor described herein may be a DC motor used in an automobile electric tailgate lifting system or an automatic door closing system.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

本实用新型涉及一种用于马达的轴承室结构，其包括与马达外壳一体成型的轴承壳，该轴承壳限定用于容纳轴承的腔室，该轴承抵靠转子轴的轴肩安装在转子轴上并接纳在所述腔室中，所述转子轴的一端部经所述轴承壳的中央开口向外突出并与输出齿轮联接以输出动力，其特征在于，所述轴承壳包括适于夹在所述输出齿轮与所述轴承之间的凸缘部。采用根据本实用新型的用于马达的轴承室结构，极大地提高了马达所能够承受的轴向冲击力，提高了运行稳定性，并且降低了运行过程中的噪音。

Description

用于马达的轴承室结构 技术领域
本实用新型涉及马达领域，更具体地涉及特别是用在冲击环境下的马达的轴承室结构。
背景技术
在汽车领域中，常常在各种汽车电动尾门升降系统中或车门自动关闭系统中应用有电动马达以实现尾门的升降或车门的关闭。现有技术中，这些马达的外壳或端盖结构中包括用于容纳转子轴的轴承的轴承室结构。该轴承室结构的轴承壳通常与马达外壳一体形成。
如图1所示，现有技术中的轴承室结构包括限定容纳用于转子轴的轴承的腔室的轴承壳，该轴承壳设置有供转子轴的一端部穿过的开口，转子轴的该端部在腔室外与输出齿轮联接以传输动力。然而，当马达在存在较大冲击的环境下使用时，联接在转子轴一端处的输出齿轮常常会存在轴向窜动，这会在轴向上产生较大的冲击力，而这种轴向冲击力(尤其是朝向马达部件方向的冲击力)在现有技术的轴承室结构设计中主要由轴承承受，但是由于轴承压装在轴承腔室中的拉脱力远远不能满足齿轮的轴向冲击力，因此极易最终对马达造成损害。
此外，本领域中，马达外壳、输出齿轮以及轴承通常由金属材料制成，因而在输出齿轮的旋转过程中，当存在上述轴向窜动和轴向冲击力时，输出齿轮与轴承之间或者输出齿轮与外壳之间会发生接触和碰撞，从而导致马达在运行过程中的噪音较大，造成马达使用者的不适。
因此，需要提出一种新型的用于马达的轴承室结构，使得能够克服上述一个或多个问题和/或现有技术中存在的其它缺陷。
实用新型内容
本实用新型是基于这样的背景而提出的，且其目的在于提供一种新型 的用于马达的轴承室结构，使得马达外壳能够在轴向方向上承受更大的轴向力，从而使得输出齿轮能够承受更大的轴向冲击力，减少潜在的风险，提升马达的合格率，同时还尽可能地降低马达的运行噪音。
根据本实用新型的用于马达的轴承室结构，其包括与马达外壳一体成型的轴承壳，该轴承壳限定用于容纳轴承的腔室，该轴承抵靠转子轴的轴肩安装在转子轴上并接纳在所述腔室中，所述转子轴的一端部经所述轴承壳的中央开口向外突出并与输出齿轮联接以输出动力，其中，所述轴承壳包括适于夹在所述输出齿轮与所述轴承之间的凸缘部。
有利地，所述轴承壳与所述马达外壳一体冲压成型，所述凸缘部通过沿与所述轴承壳的成型方向相反的方向冲压而成。
有利地，所述凸缘部相对于所述轴承壳的轴向最外边缘下沉以限定一凹腔。
有利地，在所述凹腔内，在所述输出齿轮与所述凸缘部之间叠置有第一垫片和第二垫片。
有利地，所述第一垫片与所述转子轴紧配合，所述第二垫片与所述轴承壳的限定所述凹腔的径向内壁紧配合。
有利地，所述第一垫片和第二垫片由塑料材料制成。
采用根据本实用新型的用于马达的轴承室结构，极大地提高了马达所能够承受的轴向冲击力，提高了马达的运行稳定性，并且降低了运行过程中的噪音。
附图说明
通过以下参照附图的描述，本实用新型的上述和其他特征和优点将变得更加容易理解，附图中：
图1在剖视图中示出现有技术中用于马达的轴承室结构；
图2在剖视图中示出根据本实用新型的示例性的用于马达的轴承室结构；以及
图3在剖视图中示出组装有轴承、转子轴和输出齿轮的根据本实用新 型的示例性的用于马达的轴承室结构。
具体实施方式
下面结合附图和具体实施例进一步详细地说明本实用新型。在以下描述中可能使用的关于方位的说明，比如“上”、“下”、“内”、“外”、“径向”、“轴向”等，除非具有明确说明，仅为了方便描述，而无欲对实用新型技术方案形成任何限定。
针对在背景技术部分提及的如图1中所示的现有技术中的用于马达的轴承室结构的不足，提出了一种新型的、能够更好地适应于如车门关闭、汽车尾门升降等环境的马达外壳结构。图2和图3在剖视图中分别示出了根据本实用新型的实施例的用于马达的轴承室结构和组装有轴承、转子轴和输出齿轮的该轴承室结构。
应理解的是，特别是在汽车电动尾门升降系统或车门自动关闭系统这样的存在较大冲击的环境中，对于马达的抗冲击能力要求较高。常常由于存在较大的冲击，输出齿轮在旋转过程中在轴向上极易发生窜动而产生极大的轴向冲击力，这种冲击力在已知的马达外壳设计中主要由转子轴的轴承承受，然而该轴承常常由于无法抵抗这种轴向冲击力而使得最终将力传递至马达各部件中，最终使得损坏马达。
图2和图3中所示出的根据本实用新型的实施例的用于马达的轴承室结构在现有设计的基础上进行了改进。与现有设计类似的是，该轴承室结构1包括与马达外壳9一体成型、尤其是一体冲压成型的轴承壳，该轴承壳限定有用于容纳轴承2的腔室3，该轴承2抵靠转子轴4的轴肩5安装在转子轴4上并接纳在所述腔室3中，所述转子轴4的一端经所述轴承壳的中央开口6向外突出并与输出齿轮7联接以输出动力。与现有技术不同的是，轴承室结构1有利地包括设置在输出齿轮7与轴承2之间的附加的承力结构，该承力结构优选地一体形成在马达外壳9上，以使得可以有效地承担来自输出齿轮的轴向冲击力。
如图2所示的具体实施例中，该承力结构包括沿与轴承壳的成型方向 相反的方向冲压而成的凸缘部8，该凸缘部8夹在输出齿轮7与轴承2之间以用作上述附加的承力结构。输出齿轮7位于凸缘部8上方，如此有助于借助该凸缘部8使马达外壳9尽可能多地承受来自输出齿轮7的轴向冲击力，从而避免因轴承2无法承受该冲击力而最终引起对马达部件的损坏。然而，应理解的是，其它能够实现上述功能和目的的其它形式的承力结构也是可以的。
参见图2和3，凸缘部8相对于轴承壳的轴向最外边缘13下沉以限定凹腔10。在所述凹腔10内且在所述凸缘部8与所述输出齿轮7之间叠置有优选由塑料材料制成的两个垫片11和12。当然，根据特定的需求，也可以布置更多数量的垫片类结构。
如图3中所示，第一垫片11与转子轴4设置成紧配合，使得该第一垫片11与该转子轴4以及输出齿轮7能够一同旋转。第二垫片12与轴承壳的限定所述凹腔10的径向内壁紧配合，如此使得输出齿轮7在旋转时仅在由塑料材料制成的第一垫片11和第二垫片12之间发生摩擦或碰撞，从而避免通常在由金属材料制成的输出齿轮7与马达外壳9之间发生直接接触，从而极大地降低马达在运行过程中的噪音。
马达外壳9通常与轴承壳形成为一体件。根据一具体实施例，借助于冲压模具沿轴向方向向上地(即沿远离容纳马达部件的外壳腔室的方向)将一部分马达外壳冲压成用于转子轴4的轴承室结构1。然后，再利用冲压模具并借助于冲头沿轴向方向向下地，即反向地冲压，使得形成下沉的凸缘部8以用作输出齿轮7与轴承2之间的附加的承力结构并且提供用于布置塑料垫片的凹腔10。在组装马达时，通常在安装完上下叠置的两个塑料垫片后再压装输出齿轮，通过借助于两个塑料垫片之间的接触代替输出齿轮与金属外壳之间的直接接触，达到减噪的目的。
根据本实用新型的用于马达的轴承室结构，在未采取其它额外工艺成本的情况下，能够极大增加马达可承受的齿轮的轴向冲击力。另外，通过反向冲压形成的外壳轴承室结构加工方便，可适应多种不同尺寸的马达，且结构稳定性好。
优选地，本文中所述的马达可为用于汽车电动尾门升降系统或者车门自动关闭系统中的直流马达。
应当指出，上面说明的实施例仅应被视为示例性的，本实用新型不限于这些实施例。通过考虑本说明书的内容，本领域技术人员可在不偏离本实用新型的范围或精神的情况下做出多种改变和变型。本实用新型的真实范围由所附权利要求以及等同方案限定。

Claims (6)

  1. 一种用于马达的轴承室结构，其包括与马达外壳一体成型的轴承壳，该轴承壳限定用于容纳轴承的腔室，该轴承抵靠转子轴的轴肩安装在转子轴上并接纳在所述腔室中，所述转子轴的一端部经所述轴承壳的中央开口向外突出并与输出齿轮联接以输出动力，其特征在于，所述轴承壳包括适于夹在所述输出齿轮与所述轴承之间的凸缘部。
  2. 根据权利要求1所述的轴承室结构，其特征在于，所述轴承壳与所述马达外壳一体冲压成型，所述凸缘部通过沿与所述轴承壳的成型方向相反的方向冲压而成。
  3. 根据权利要求2所述的轴承室结构，其特征在于，所述凸缘部相对于所述轴承壳的轴向最外边缘下沉以限定一凹腔。
  4. 根据权利要求3所述的轴承室结构，其特征在于，在所述凹腔内，在所述输出齿轮与所述凸缘部之间叠置有第一垫片和第二垫片。
  5. 根据权利要求4所述的轴承室结构，其特征在于，所述第一垫片与所述转子轴紧配合，所述第二垫片与所述轴承壳的限定所述凹腔的径向内壁紧配合。
  6. 根据权利要求4或5所述的轴承室结构，其特征在于，所述第一垫片和第二垫片由塑料材料制成。
PCT/CN2019/109937 2018-10-08 2019-10-08 用于马达的轴承室结构 WO2020073886A1 (zh)

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