WO2023130641A1 - 一种阶梯孔定位的电驱动变速箱总成 - Google Patents

一种阶梯孔定位的电驱动变速箱总成 Download PDF

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Publication number
WO2023130641A1
WO2023130641A1 PCT/CN2022/093019 CN2022093019W WO2023130641A1 WO 2023130641 A1 WO2023130641 A1 WO 2023130641A1 CN 2022093019 W CN2022093019 W CN 2022093019W WO 2023130641 A1 WO2023130641 A1 WO 2023130641A1
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WIPO (PCT)
Prior art keywords
housing
positioning
hole
bearing
electric drive
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PCT/CN2022/093019
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English (en)
French (fr)
Inventor
李建文
杨旭东
李家琪
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精进电动科技股份有限公司
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Publication of WO2023130641A1 publication Critical patent/WO2023130641A1/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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02021—Gearboxes; Mounting gearing therein with means for adjusting alignment

Definitions

  • the invention belongs to the technical field of electric drive assemblies, in particular to an electric drive gearbox assembly with stepped hole positioning.
  • the power assembly In order to make the axial size of the power assembly more compact, the power assembly mostly adopts an integrated shaft structure supported by multiple bearings. .
  • the housings of the power assembly are usually positioned and connected through positioning pins and positioning holes.
  • the bearing roller and the inner ring of the bearing are squeezed against each other during the assembly process, causing scratches on the surface of the bearing raceway, which in turn affects the bearing and the inner ring. Performance and longevity of the entire powertrain.
  • the existing patent "Electric drive power transmission system box assembly and its installation method for step pin positioning" (application number: 202110202229.3) proposes to prevent the inner ring of the bearing from being squeezed by the bearing roller by setting the step pin. Occurrence of scratches on the bearing raceway surface.
  • the two ends of the stepped pins have different structures, when the first shell and the intermediate shell are mass-assembled through the stepped pins, the end of the stepped pins is likely to be reversed, resulting in invalid assembly and affecting assembly efficiency.
  • the present invention discloses an electric drive gearbox assembly with stepped hole positioning, so as to overcome the above problems or at least partly solve the above problems.
  • the present invention provides an electric drive gearbox assembly with step hole positioning, and the electric drive gearbox assembly includes a first housing, a second housing and positioning pins;
  • a first positioning hole is provided on the connecting surface of the first housing, a second positioning hole corresponding to the first positioning hole is provided on the second housing, and the first housing and the first positioning hole The two housings are positioned and connected through the first positioning hole, the second positioning hole and the positioning pin;
  • the first positioning hole and/or the second positioning hole is a stepped hole, and the stepped hole includes a guiding section close to the hole and a matching section away from the hole, and the diameter of the guiding section is larger than that of the matching section
  • the hole diameter, the guide section is used to guide the positioning pin to enter the matching section.
  • the aperture size of the fitting section in the stepped hole is consistent with the diameter of the positioning pin;
  • the matching section is interference fit with the positioning pin.
  • the outer surface of the positioning pin is provided with an axially arranged ventilation groove.
  • first casing and/or the second casing is provided with a ventilation hole, and the ventilation hole communicates with the matching section.
  • the end of the positioning pin is provided with a guiding slope or a guiding arc.
  • the stepped hole further includes a guide section disposed between the guide section and the matching section, and the guide section is used for guiding the positioning pin from the guide section into the matching section.
  • the electric drive gearbox assembly also includes a power shaft, one end of the power shaft is supported and connected to the first housing through a first bearing, and the middle position of the power shaft is connected to the first housing through a second bearing.
  • the second housing supports the connection.
  • the inner ring of the first bearing is fixedly connected with the power shaft, and the outer ring of the first bearing is fixedly connected with the first housing.
  • the gap between the guide section and the positioning pin satisfies: when more than half of the axial part of the roller of the first bearing enters the raceway of the inner ring of the first bearing During the assembly process, radial spaces are maintained among the inner ring of the first bearing, the outer ring of the first bearing and the rollers of the first bearing.
  • the axial lengths of the guide section and the matching section are determined according to the axial dimensions of the first bearing, the first housing and the power shaft.
  • the guide section of the stepped hole and the positioning pin By setting the first positioning hole on the first housing and/or the second positioning hole on the second housing as a stepped hole, the guide section of the stepped hole and the positioning pin
  • the radial gap between the first housing and the second housing can be pre-positioned, and the first housing can be adjusted radially relative to the second housing during the pre-positioning, which is convenient for the first housing and the second housing
  • the second housing is positioned and assembled; in addition, since the two ends of the positioning pin can be matched with the first positioning hole and the second positioning hole, the positioning pin does not need to be matched with the first positioning hole and the second positioning hole for positioning. There will be invalid assembly, which promotes the automatic and mass assembly of the electric drive assembly.
  • Fig. 1 is an axial sectional view of the electric drive gearbox assembly in Embodiment 1 of the present invention
  • FIG. 2 is a sectional view of the initial position of the first bearing assembly process of the electric drive gearbox assembly in Embodiment 1 of the present invention
  • Fig. 3 is a cross-sectional view of the fitting section where the positioning pin begins to enter the first positioning hole during the assembly process of the first bearing of the electric drive gearbox assembly in Embodiment 1 of the present invention
  • Fig. 4 is a cross-sectional view of the roller of the first bearing completely entering the raceway of the inner ring during the assembly process of the first bearing of the electric drive gearbox assembly in Embodiment 1 of the present invention
  • Fig. 5 is an axial sectional view of the electric drive gearbox assembly in Embodiment 2 of the present invention.
  • Fig. 6 is a cross-sectional view of the matching section where the positioning pin starts to enter the first positioning hole during the assembly process of the first bearing of the electric drive gearbox assembly in Embodiment 2 of the present invention.
  • the electric drive gearbox assembly includes a first housing 1 , a second housing 2 and a positioning pin 3 .
  • the radial cross-section of the positioning pin 3 may be a circle, a regular polygon, or other shapes.
  • first positioning holes 4 are provided on the connecting surface of the first housing 1 and the second housing 2, and the specific number and positions of the first positioning holes 4 can be adjusted as required.
  • the body 2 is provided with a second positioning hole 5 corresponding to the first positioning hole 4, and the first housing 1 and the second housing 2 are positioned and connected through the first positioning hole 4, the second positioning hole 5 and the positioning pin 3, namely Both ends of the positioning pin 3 are inserted into the first positioning hole 4 and the second positioning hole 5 respectively, so as to realize the relative fixing of the first housing 1 and the second housing 2 .
  • the first positioning hole 4 is a stepped hole, which specifically includes a guide section 4-1 close to the orifice and a matching section 4-2 away from the orifice. Section 4-1 is used to guide positioning pin 3 into mating section 4-2. Moreover, the interference fit between the second positioning hole 5 and the positioning pin 3 is preferable. In this way, when the first housing 1 and the second housing 2 are assembled through the positioning pin 3, one end of the positioning pin 3 is first inserted into the second positioning hole 5, and then the other end of the positioning pin 3 is inserted into the first positioning hole.
  • the positioning pin 3 and the first positioning hole 4 realize the pre-positioning, that is, the first housing 1 and the second housing 2 realize the pre-positioning, at this time, because the positioning pin 3 and the guiding section 4 There is a radial gap between -1, so that the first housing 1 can be radially adjusted relative to the second housing 2; when the end of the positioning pin 3 enters the When the segment 4-2 is matched, the radial positioning of the first shell 1 and the second shell 2 is realized.
  • the second positioning hole may also be set as a stepped hole and the first positioning hole may be a straight hole, or both the first positioning hole and the second positioning hole may be set as stepped holes.
  • the guidance of the stepped hole can be utilized.
  • the radial gap between the segment and the positioning pin can realize the pre-positioning of the first shell and the second shell, and the first shell can be adjusted radially relative to the second shell during the pre-positioning, which is convenient for the second shell.
  • the first housing and the second housing are positioned and assembled; in addition, since both ends of the positioning pin can be matched with the first positioning hole and the second positioning hole, the positioning pin is assembled with the first positioning hole and the second positioning hole. Ineffective assembly will not occur during positioning, which improves assembly efficiency and promotes automatic and batch assembly of electric drive assemblies.
  • the aperture size of the fitting section in the stepped hole is consistent with the diameter of the positioning pin.
  • the accuracy of the assembly of the first shell and the second shell can be improved, which can effectively prevent the electric drive gearbox from The overall cause is structural looseness or abnormal noise caused by long-term vibration.
  • an interference fit may also be used between the matching section and the positioning pin, so as to achieve a firm and fixed connection between the first housing and the second housing.
  • the outer surface of the locating pin is provided with an axially arranged ventilation groove.
  • the first positioning hole further includes a guide section arranged between the guide section and the matching section, and the guide section is used for guiding the positioning pin from the guide section into the matching section, so that the end of the positioning pin is more spaced from the guide section. Easy and precise access to the mating section, thereby improving assembly efficiency.
  • the electric drive gearbox assembly also includes a power shaft 6, one end of the power shaft 6 is supported and connected to the first housing 1 through a first bearing 7, and the power shaft 6 The middle position is supported and connected with the second housing 2 through the second bearing 8 .
  • the inner ring 7-1 of the first bearing is fixedly connected to the power shaft 6, the outer ring 7-2 of the first bearing is fixedly connected to the first housing 1, and the roller 7-3 of the first bearing is fixed to the first bearing on the outer ring 7-2.
  • the gap between the guide section and the positioning pin satisfies: during the assembly process of inserting more than half of the axial part of the roller in the first bearing into the raceway of the inner ring of the first bearing, the first bearing A radial space is maintained among the inner ring, the outer ring of the first bearing and the rollers of the first bearing.
  • the axial lengths of the guiding section and the matching section are determined according to the axial dimensions of the first bearing, the first housing and the power shaft.
  • the axial length of the guide section can make the end of the positioning pin inserted into the initial or middle section of the guide section, the outer ring of the first bearing, the rollers of the first bearing and the inner ring of the first bearing are in the initial assembly position
  • the position is such that when the end of the positioning pin is inserted into the end of the guide section, at least half of the rollers of the first bearing enter the slideway of the inner ring of the first bearing.
  • the axial length of the mating section is such that when the end of the locating pin is fully inserted into the mating section, the remaining part of the roller of the first bearing completely enters the raceway of the inner ring of the first bearing.
  • the first housing 1 and the second housing 2 are assembled, as shown in Figure 2, when the end of the positioning pin 3 is inserted into the guide section 4-1, the first bearing 7 is in the assembly Because there is a radial gap between the positioning pin 3 and the guide section 4-1, the first housing 1 can be radially adjusted relative to the second housing 2, so that the inner ring 7-1 of the first bearing and the second housing 2 There is enough radial space between the rollers 7-3 of the first bearing, which is convenient for radial adjustment of the two, and can prevent the inner ring 7-1 of the first bearing and the roller 7-3 of the first bearing from scratching each other.
  • the step fit between the positioning pin and the stepped hole can be realized, which can prevent the inner ring of the first bearing from colliding with the roller of the first bearing during the assembly of the first housing and the second housing. Extrusion causes the raceway surface of the inner ring of the first bearing to be scratched, thereby improving the service life of the first bearing and the electric drive gearbox assembly.
  • Embodiment 1 The difference from Embodiment 1 is that, as shown in Figures 5 to 6, the inner ring 7-1 of the first bearing is fixedly connected to the power shaft 6, and the outer ring 7-2 of the first bearing is connected to the first housing 1 fixed connection, the roller 7-3 of the first bearing is fixed on the inner ring 7-1 of the first bearing.
  • the first bearing can be a split cylindrical roller bearing.
  • Embodiment 1 omits the design of the ventilation groove.
  • the first housing and the second housing are provided with vent holes, and the vent holes communicate with the mating section.
  • the vent hole can discharge the gas between the positioning pin and the matching section, so that the positioning pin can smoothly enter the matching section.
  • the ventilation hole is arranged on the first casing; when only the second positioning hole is a stepped hole, the ventilation hole is arranged on the second casing.
  • the end of the positioning pin is provided with a guide slope or a guiding arc, which facilitates the positioning pin from the guide section to the mating section and reduces the difficulty of assembly.

Abstract

一种阶梯孔定位的电驱动变速箱总成，具体包括第一壳体（1）、第二壳体（2）和定位销（3）；第一壳体的连接面上设有第一定位孔（4），第二壳体上设有与第一定位孔对应的第二定位孔（5），第一壳体和第二壳体通过第一定位孔、第二定位孔和定位销定位连接；第一定位孔和/或第二定位孔为阶梯孔，阶梯孔包括靠近孔口的引导段（4-1）和远离孔口的配合段（4-2），引导段的孔径大于配合段的孔径，引导段用于引导定位销进入配合段。该电驱动变速箱总成中，第一壳体在与第二壳体进行装配时可进行预定位，且在预定位时第一壳体可相对于第二壳体进行径向调整，便于第一壳体与第二壳体定位装配，促使电驱动总成实现自动化、批量化组装。

Description

一种阶梯孔定位的电驱动变速箱总成
相关申请的交叉引用
本申请要求于2022年01月04日提交中国专利局，申请号为202210002945.1，申请名称为“一种阶梯孔定位的电驱动变速箱总成”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于电驱动总成技术领域，特别涉及一种阶梯孔定位的电驱动变速箱总成。
背景技术
随着汽车行业的不断发展，人们对变速箱及整个汽车动力系统结构设置的要求越来越高，为了使动力总成的轴向尺寸更加紧凑，动力总成大多采用多轴承支撑的一体轴结构。并且，动力总成的壳体间通常通过定位销和定位孔实现定位连接，在将安装有轴承外圈及轴承滚子的一个壳体总成装配到安装有轴承内圈的另一个壳体总成的过程中，由于定位销与定位孔之间无足够的偏移空间，导致轴承滚子与轴承内圈在装配过程中相互挤压，使轴承滚道的表面出现刮痕，进而影响轴承及整个动力系统的性能和寿命。
对此，现有专利“阶梯销定位的电驱动动力传动系统箱体总成及其安装方法”(申请号：202110202229.3)中提出通过设置阶梯销来防止轴承内圈与轴承滚子挤压导致的轴承滚道表面刮伤现象的发生。但是，由于阶梯销的两端结构并不相同，在第一壳体与中间壳体通过阶梯销进行批量装配时，容易出现阶梯销端部装反的情况，导致无效装配，进而影响装配效率。
申请内容
针对上述问题，本发明公开了一种阶梯孔定位的电驱动变速箱总成，以克服上述问题或者至少部分地解决上述问题。
为了实现上述目的，本发明采用以下技术方案：
本发明提供一种阶梯孔定位的电驱动变速箱总成，所述电驱动变速箱总成包括 第一壳体、第二壳体和定位销；
所述第一壳体的连接面上设有第一定位孔，所述第二壳体上设有与所述第一定位孔对应的第二定位孔，所述第一壳体和所述第二壳体通过所述第一定位孔、所述第二定位孔和所述定位销定位连接；
所述第一定位孔和/或所述第二定位孔为阶梯孔，所述阶梯孔包括靠近孔口的引导段和远离孔口的配合段，所述引导段的孔径大于所述配合段的孔径，所述引导段用于引导所述定位销进入所述配合段。
进一步地，所述阶梯孔中所述配合段的孔径大小与所述定位销的直径大小一致；或者，
所述配合段与所述定位销过盈配合。
进一步地，所述定位销的外表面上设有轴向设置的通气槽。
进一步地，所述第一壳体和/或所述第二壳体上设有通气孔，所述通气孔与所述配合段连通。
进一步地，所述定位销的端部设有导向斜面或导向弧面。
进一步地，所述阶梯孔还包括设置于所述引导段和所述配合段之间的导向段，所述导向段用于所述定位销由所述引导段进入所述配合段的导向。
进一步地，所述电驱动变速箱总成还包括动力轴，所述动力轴的一端通过第一轴承与所述第一壳体支撑连接，所述动力轴的中间位置通过第二轴承与所述第二壳体支撑连接。
进一步地，所述第一轴承的内圈与所述动力轴固定连接，所述第一轴承的外圈与所述第一壳体固定连接。
进一步地，所述阶梯孔中，所述引导段与所述定位销间的间隙满足：在所述第一轴承的滚子轴向一半以上的部分进入所述第一轴承的内圈滚道的装配过程中，使所述第一轴承的内圈、所述第一轴承的外圈和所述第一轴承的滚子三者之间的均保持有径向空间。
进一步地，所述阶梯孔中，所述引导段和所述配合段的轴向长度根据所述第一轴承、所述第一壳体和所述动力轴的轴向尺寸确定。
本发明的优点及有益效果是：
本发明的电驱动变速箱总成中，通过将第一壳体上的第一定位孔和/或第二壳体上的第二定位孔设置为阶梯孔，利用阶梯孔的引导段与定位销之间存在的径向间 隙，可实现第一壳体与第二壳体的预定位，并且在预定位时第一壳体可相对于第二壳体进行径向调整，便于第一壳体与第二壳体定位装配；另外，由于定位销的两端均可与第一定位孔和第二定位孔进行配合，因此定位销在与第一定位孔和第二定位孔进行转配定位时不会发生无效装配的情况，促使了电驱动总成实现自动化、批量化组装。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本发明实施例1中电驱动变速箱总成的轴向截面图；
图2为本发明实施例1中电驱动变速箱总成的第一轴承装配过程的初始位置截面图；
图3为本发明实施例1中电驱动变速箱总成的第一轴承装配过程中定位销开始进入第一定位孔的配合段的截面图；
图4为本发明实施例1中电驱动变速箱总成的第一轴承装配过程中第一轴承的滚子完全进入内圈滚道的截面图；
图5为本发明实施例2中电驱动变速箱总成的轴向截面图；
图6为本发明实施例2中电驱动变速箱总成的第一轴承装配过程中定位销开始进入第一定位孔的配合段的截面图。
图中：1、第一壳体；2、第二壳体；3、定位销；4、第一定位孔；4-1、引导段；4-2、配合段；5、第二定位孔；6、动力轴；7、第一轴承；7-1、第一轴承的内圈；7-2、第一轴承的外圈；7-3、第一轴承的滚子；8、第二轴承。
具体实施例
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请 保护的范围。
以下结合附图，详细说明本发明各实施例提供的技术方案。
实施例1
本实施例提供一种阶梯孔定位的电驱动变速箱总成，如图1～图4所示，该电驱动变速箱总成包括第一壳体1、第二壳体2和定位销3。其中，定位销3的径向截面可以是圆形或正多边形，亦或者其他形状。
具体地，在第一壳体1中与第二壳体2形成连接的连接面上设有第一定位孔4，第一定位孔4的具体设置数量和位置可根据需要进行调整，第二壳体2上设有与第一定位孔4对应的第二定位孔5，第一壳体1和第二壳体2通过第一定位孔4、第二定位孔5和定位销3定位连接，即定位销3的两端分别插入到第一定位孔4和第二定位孔5中，实现第一壳体1和第二壳体2的相对固定。
其中，第一定位孔4为阶梯孔，具体包括靠近孔口的引导段4-1和远离孔口的配合段4-2，引导段4-1的孔径大于配合段4-2的孔径，引导段4-1用于引导定位销3进入配合段4-2。并且，第二定位孔5与定位销3之间优选为过盈配合。这样，在第一壳体1和第二壳体2通过定位销3进行装配时，定位销3的一端先插入第二定位孔5中，再将定位销3的另一端插入到第一定位孔4中的引导段4-1时，定位销3与第一定位孔4实现预定位，即第一壳体1与第二壳体2实现预定位，此时，由于定位销3与引导段4-1之间存在径向的间隙，使第一壳体1可相对第二壳体2进行径向调整；当定位销3的端部由第一定位孔4中的引导段4-1进入到配合段4-2时，第一壳体1和第二壳体2实现径向定位。
当然，在其他实施例中，也可以将第二定位孔设置为阶梯孔而第一定位孔采用直孔，或者设置第一定位孔和第二定位孔为均为阶梯孔。
综上，本实施例的电驱动变速箱总成中，通过将第一壳体上的第一定位孔和/或第二壳体上的第二定位孔设置为阶梯孔，利用阶梯孔的引导段与定位销之间存在的径向间隙，可实现第一壳体与第二壳体的预定位，并且在预定位时第一壳体可相对于第二壳体进行径向调整，便于第一壳体与第二壳体定位装配；另外，由于定位销的两端均可与第一定位孔和第二定位孔进行配合，因此定位销在与第一定位孔和第二定位孔进行装配定位时不会发生无效装配的情况，提高了装配效率，促使电驱动总成实现自动化、批量化组装。
在本实施例中，阶梯孔中配合段的孔径大小与定位销的直径大小一致，通过大小一致的设置可以提高第一壳体与第二壳体装配后的精度，可以有效防止电驱动变速箱总成因在长期振动过程中导致的结构松动或者产生异响。当然，在其他实施例中，配合段与定位销之间也可以采用过盈配合，进而实现第一壳体与第二壳体的牢固固定连接。
进一步地，定位销的外表面上设有轴向设置的通气槽，当定位销的端部由引导段进入到配合段时，通过通气槽排出定位销与配合段之间的气体，使定位销能顺利进入到配合段中。
在本实施例中，第一定位孔还包括设置于引导段和配合段之间的导向段，导向段用于定位销由引导段进入配合段的导向，使定位销的端部由引导段更容易精确进入到配合段中，进而提高装配效率。
在本实施例中，如图1～图4所示，电驱动变速箱总成还包括动力轴6，动力轴6的一端通过第一轴承7与第一壳体1支撑连接，动力轴6的中间位置通过第二轴承8与第二壳体2支撑连接。
其中，第一轴承的内圈7-1与动力轴6固定连接，第一轴承的外圈7-2与第一壳体1固定连接，第一轴承的滚子7-3固定于第一轴承的外圈7-2上。
并且，第一定位孔中，引导段与定位销间的间隙满足：在将第一轴承中滚子轴向一半以上的部分进入第一轴承内圈滚道的装配过程中，使第一轴承的内圈、第一轴承的外圈和第一轴承的滚子三者之间的均保持有径向空间。
另外，第一定位孔中，引导段和配合段的轴向长度根据第一轴承、第一壳体和动力轴的轴向尺寸确定。具体地，引导段的轴向长度可使定位销的端部插入到引导段的初段或中段位置时，第一轴承的外圈、第一轴承的滚子和第一轴承的内圈处于开始装配的位置，使定位销的端部插入到引导段的末端时，第一轴承的滚子至少一半进入第一轴承的内圈滑道。配合段的轴向长度可使定位销的端部完全插入到配合段时，第一轴承的滚子的剩余部分完全进入到第一轴承的内圈滚道中。
在本实施例中，在第一壳体1与第二壳体2进行装配时，如图2所示，当定位销3的端部插入到引导段4-1时，第一轴承7处于装配位置，由于定位销3与引导段4-1之间存在径向空隙，使第一壳体1可相对第二壳体2进行径向调整，进而使第一轴承的内圈7-1和第一轴承的滚子7-3之间存在足够的径向空间，便于两者进行径向调整，可防止第一轴承的内圈7-1和第一轴承的滚子7-3相互剐蹭导致的刮 伤；如图3所示，当第一轴承的滚子7-3轴向至少一半以上的部分进入第一轴承的内圈滚道时，定位销3的端部开始进入配合段4-2；当定位销3的端部插入到配合段4-2时，如图4所示，此时第一轴承的滚子7-3完全进入到第一轴承内圈滚道中，即第一轴承7完成装配。
通过将第一定位孔设置成阶梯孔，实现定位销与阶梯孔的阶梯配合，可防止在装配第一壳体和第二壳体过程中，第一轴承的内圈与第一轴承的滚子挤压，导致的第一轴承的内圈滚道表面被刮伤的情况发生，进而提高了第一轴承和电驱动变速箱总成的使用寿命。
实施例2
与实施例1不同之处在于，如图5～图6所示，其中，第一轴承的内圈7-1与动力轴6固定连接，第一轴承的外圈7-2与第一壳体1固定连接，第一轴承的滚子7-3固定于第一轴承的内圈7-1上。此时，第一轴承可选用分体式圆柱滚子轴承。
实施例3
与实施例1不同之处在于，本实施例省去了通气槽的设计。另外，当第一定位孔和第二定位孔均为阶梯孔时，第一壳体和第二壳体上均设有通气孔，通气孔与配合段连通，在定位销进入到配合段时，通气孔可以排出定位销与配合段之间的气体，使定位销能顺利进入到配合段中。当只有第一定位孔为阶梯孔时，通气孔设置在第一壳体上；当只有第二定位孔为阶梯孔时，通气孔设置在第二壳体上。
实施例4
与实施例1不同之处在于，本实施例中，定位销的端部设有导向斜面或导向弧面，便于定位销由引导段进入到配合段，降低装配难度。
以上所述，仅为本申请的具体实施方式，在本申请的上述教导下，本领域技术人员可以在上述实施例的基础上进行其他的改进或变形。本领域技术人员应该明白，上述的具体描述只是更好的解释本申请的目的，本申请的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种阶梯孔定位的电驱动变速箱总成，其特征在于，所述电驱动变速箱总成包括第一壳体、第二壳体和定位销；
    所述第一壳体的连接面上设有第一定位孔，所述第二壳体上设有与所述第一定位孔对应的第二定位孔，所述第一壳体和所述第二壳体通过所述第一定位孔、所述第二定位孔和所述定位销定位连接；
    所述第一定位孔和/或所述第二定位孔为阶梯孔，所述阶梯孔包括靠近孔口的引导段和远离孔口的配合段，所述引导段的孔径大于所述配合段的孔径，所述引导段用于引导所述定位销进入所述配合段。
  2. 根据权利要求1所述的电驱动变速箱总成，其特征在于，所述阶梯孔中所述配合段的孔径大小与所述定位销的直径大小一致；或者，
    所述配合段与所述定位销过盈配合。
  3. 根据权利要求2所述的电驱动变速箱总成，其特征在于，所述定位销的外表面上设有轴向设置的通气槽。
  4. 根据权利要求2所述的电驱动变速箱总成，其特征在于，所述第一壳体和/或所述第二壳体上设有通气孔，所述通气孔与所述配合段连通。
  5. 根据权利要求1所述的电驱动变速箱总成，其特征在于，所述定位销的端部设有导向斜面或导向弧面。
  6. 根据权利要求1所述的电驱动变速箱总成，其特征在于，所述阶梯孔还包括设置于所述引导段和所述配合段之间的导向段，所述导向段用于所述定位销由所述引导段进入所述配合段的导向。
  7. 根据权利要求1-6任一项所述的电驱动变速箱总成，其特征在于，所述电驱动变速箱总成还包括动力轴，所述动力轴的一端通过第一轴承与所述第一壳体支撑连接，所述动力轴的中间位置通过第二轴承与所述第二壳体支撑连接。
  8. 根据权利要求7所述的电驱动变速箱总成，其特征在于，所述第一轴承的内圈与所述动力轴固定连接，所述第一轴承的外圈与所述第一壳体固定连接。
  9. 根据权利要求8所述的电驱动变速箱总成，其特征在于，所述阶梯孔中，所述引导段与所述定位销间的间隙满足：在所述第一轴承的滚子轴向一半以上的部分进入所述第一轴承的内圈滚道的装配过程中，使所述第一轴承的内圈、所述第一轴 承的外圈和所述第一轴承的滚子三者之间的均保持有径向空间。
  10. 根据权利要求8所述的电驱动变速箱总成，其特征在于，所述阶梯孔中，所述引导段和所述配合段的轴向长度根据所述第一轴承、所述第一壳体和所述动力轴的轴向尺寸确定。
PCT/CN2022/093019 2022-01-04 2022-05-16 一种阶梯孔定位的电驱动变速箱总成 WO2023130641A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426639A1 (de) * 2002-12-05 2004-06-09 Ab Skf Verfahren zur Montage eines zweireihigen Kegelrollenlagers mit geteilten Lagerringen in einer Windkraftanlage
JP2009008243A (ja) * 2007-06-28 2009-01-15 Fuji Hensokuki Co Ltd ギャードモータの据付構造
CN108194621A (zh) * 2018-01-02 2018-06-22 延锋安道拓座椅机械部件有限公司 一种带自定位功能的齿轮箱
CN108674179A (zh) * 2018-06-12 2018-10-19 精进电动科技股份有限公司 一种一体化电驱动动力总成
CN214171273U (zh) * 2020-10-20 2021-09-10 浙江万里扬股份有限公司 壳组件和变速箱
CN214788944U (zh) * 2021-02-23 2021-11-19 精进电动科技股份有限公司 阶梯销定位的电驱动动力传动系统箱体总成
CN114483921A (zh) * 2022-01-04 2022-05-13 精进电动科技股份有限公司 一种阶梯孔定位的电驱动变速箱总成

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426639A1 (de) * 2002-12-05 2004-06-09 Ab Skf Verfahren zur Montage eines zweireihigen Kegelrollenlagers mit geteilten Lagerringen in einer Windkraftanlage
JP2009008243A (ja) * 2007-06-28 2009-01-15 Fuji Hensokuki Co Ltd ギャードモータの据付構造
CN108194621A (zh) * 2018-01-02 2018-06-22 延锋安道拓座椅机械部件有限公司 一种带自定位功能的齿轮箱
CN108674179A (zh) * 2018-06-12 2018-10-19 精进电动科技股份有限公司 一种一体化电驱动动力总成
CN214171273U (zh) * 2020-10-20 2021-09-10 浙江万里扬股份有限公司 壳组件和变速箱
CN214788944U (zh) * 2021-02-23 2021-11-19 精进电动科技股份有限公司 阶梯销定位的电驱动动力传动系统箱体总成
CN114483921A (zh) * 2022-01-04 2022-05-13 精进电动科技股份有限公司 一种阶梯孔定位的电驱动变速箱总成

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