CN115143228A - 悬架装置 - Google Patents
悬架装置 Download PDFInfo
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- CN115143228A CN115143228A CN202210117552.5A CN202210117552A CN115143228A CN 115143228 A CN115143228 A CN 115143228A CN 202210117552 A CN202210117552 A CN 202210117552A CN 115143228 A CN115143228 A CN 115143228A
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- ball screw
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- nut
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- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
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- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
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- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
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Abstract
本发明提供一种悬架装置,其抑制了基于滚珠丝杠的轴错位的部件劣化。悬架装置具备阻尼器(20),阻尼器(20)具备:外筒(31);滚珠丝杠(32),其收纳于外筒(31)中;紧固部件(33),其对滚珠丝杠(32)以使该滚珠丝杠(32)贯插于内侧的状态进行支承,该紧固部件(33)被安装于外筒(31)的端部;以及固定部件(70),其安装于滚珠丝杠(32)的端部,将滚珠丝杠(32)固定于紧固部件(33),在滚珠丝杠(32)贯插于紧固部件(33)中的贯插部(E)处,设置有滚珠丝杠(32)与紧固部件(33)相嵌合的嵌合部(F),嵌合部(F)为花键嵌合构造。
Description
技术领域
本发明涉及一种悬架装置。
背景技术
悬架装置例如应用于车辆,使施加于车辆的振动、冲击衰减而提高乘坐舒适性。近年来,作为这种悬架装置,开发了具备与螺纹轴部螺合的螺母、通过马达的电磁作用产生衰减力的悬架装置(例如,参照专利文献1)。专利文献1所公开的悬架装置中,在螺母从外部受到负荷而进行直进运动时,螺纹轴部会旋转。马达通过从螺纹轴部传递旋转而产生抑制旋转运动的旋转转矩。由此,螺母的直进运动被抑制,使施加于悬架装置的负荷衰减。
现有技术文献
专利文献1:日本特开2016-17535号公报
发明内容
发明要解决的课题
然而,在具备螺纹轴部(以下,滚珠丝杠)和与滚珠丝杠螺合的螺母的悬架装置中,存在将固定部件紧固于滚珠丝杠的端部、将滚珠丝杠固定于筒部的内侧的结构。该情况下,产生如下问题:基于滚珠丝杠的旋转的转矩传递至固定部件,使得固定部件的固定松动,由此,滚珠丝杠的轴错位,基于该轴偏移会施加负荷。
本发明是鉴于上述情况而完成的,其目的在于提供一种抑制了基于滚珠丝杠的轴错位的负荷的悬架装置。
用于解决课题的手段
为了达成上述目的,本发明的特征在于,具备阻尼器,所述阻尼器具备:筒部;滚珠丝杠,其收纳于所述筒部中;紧固部件,其对所述滚珠丝杠以使该滚珠丝杠贯插于内侧的状态进行支承,该紧固部件被安装于所述筒部的端部;以及固定部件,其安装于所述滚珠丝杠的端部,将所述滚珠丝杠固定于所述紧固部件,在所述滚珠丝杠贯插于所述紧固部件的贯插部处,设置有所述滚珠丝杠与所述紧固部件相嵌合的嵌合部,所述嵌合部为花键嵌合构造。
发明效果
根据本发明,能够抑制基于滚珠丝杠的旋转的转矩传递至固定部件而使得固定部件的固定松动,能够抑制滚珠丝杠的轴错位。因此,能够抑制基于滚珠丝杠的轴错位而施加负荷。
附图说明
图1是表示本发明的实施方式的悬架装置相对车辆的搭载例的图。
图2是表示悬架装置的整体像的轴向概略剖视图。
图3是轴支承有螺母ASSY的部位的放大图。
图4是用于对滚珠丝杠的倾斜进行说明的图。
图5是用于对螺母ASSY相对于轴向倾斜的状态进行说明的图。
图6是用于对螺母ASSY的支承部的刚性进行说明的图,(a)是表示未搭载滚珠丝杠撬动缓和构造时的图,(b)是表示搭载滚珠丝杠撬动缓和构造时的图。
图7是支承有滚珠丝杠的部位的放大图。
图8是滚珠丝杠贯插于紧固部件的部位的放大图。
图9是用于对转矩传递路径进行说明的图,(a)是表示不具备花键嵌合构造的情况的图,(b)是表示具备花键嵌合构造的情况的图。
标号说明
1:车轮;
2:车体;
10:悬架装置;
11:一端部;
12:另一端部;
13:弹簧;
14:第一弹簧支承部;
15:第二弹簧支承部;
20:阻尼器;
30:筒单元;
31:外筒(筒部);
32:滚珠丝杠;
33:紧固部件;
33a:侧壁部;
33b:底部;
40:壳体单元;
41:壳体;
42:第一壳体;
42a:第一壁部;
43:第二壳体;
44:内筒;
45:第二壁部;
46:金属部件;
47:轴承;
48a:第一保持架;
48b:第二保持架;
49:弹性体;
50:马达;
60:螺母ASSY(螺母单元);
61:滚珠丝杠螺母;
62:螺母支承部;
70:固定部件;
71:弹性部件;
α:空间;
β:间隙;
E:贯插部;
F:嵌合部;
G:抵接部。
具体实施方式
以下,列举优选的实施方式,参照附图对本发明的悬架装置进行详细说明。
图1是表示本实施方式的悬架装置10相对车辆的搭载例的图。
悬架装置10构成为车辆的外力缓和装置。悬架装置10设置于车体2与车轮1之间,缓和来自路面的凹凸等的外力(振动或冲击等),并且将车轮1按压向路面,由此,提高乘坐舒适性、操纵稳定性等。此外,悬架装置10的设置对象并不限定于车辆,例如能够作为抑制振动的减振装置而应用于任意的部位。
图2是悬架装置10的轴向概略剖视图。
悬架装置10为利用电磁而产生衰减力的构造。悬架装置10的一端部11(车体侧端部)被安装于车体2的悬架部位(例如,车体框架、车体的悬架部),悬架装置10的另一端部12(车轮侧端部)被安装于向车轮1传递旋转驱动力的驱动传递部(例如,从动齿轮、轴)。
悬架装置10具备弹簧13和阻尼器(减震器)20。阻尼器20形成为长圆筒状,具备壳体单元40和筒单元30。
悬架装置10具备第一弹簧支承部14和第二弹簧支承部15,在第一弹簧支承部14与第二弹簧支承部15之间配置有弹簧13。第一弹簧支承部14设置于壳体单元40侧,第二弹簧支承部15设置于筒单元30侧。
伴随弹簧13的伸缩,筒单元30能够相对于壳体单元40相对地移动。阻尼器20的伸缩通过壳体单元40与筒单元30的相对移动来实现。
筒单元30具备外筒31、滚珠丝杠32以及紧固部件33。外筒31形成为圆筒状,在其内侧配置有棒状的滚珠丝杠32。关于滚珠丝杠32与紧固部件33的嵌合将在后面进行叙述。
壳体单元40具备壳体41、马达50以及螺母ASSY60(螺母单元)。壳体41具备:第一壳体42,其形成为能够在内侧收纳螺母ASSY60的一部分;以及第二壳体43,其形成为能够在内侧收纳马达50。第一壳体42与第二壳体43通过螺纹紧固等而连结。第一壳体42中的靠车轮侧(轮胎侧)的部分为形成为直径比外筒31小的内筒44,该内筒44的一部分收纳于外筒31的内侧。壳体41和外筒31由金属形成。
螺母ASSY60在第一壳体42的内部被轴支承为能够选择。螺母ASSY60具备滚珠丝杠螺母61和螺母支承部62。螺母支承部62为在轴向上较长的圆筒状,在靠车轮侧部分的内周面设置有滚珠丝杠螺母61。滚珠丝杠螺母61具有在轴向上贯通的孔,成为在内侧贯插滚珠丝杠32的中空部件。滚珠丝杠螺母61与滚珠丝杠32螺合。
滚珠丝杠螺母61(螺母ASSY60)伴随着固定于外筒31的滚珠丝杠32在轴向上的移动而绕轴旋转。该螺母ASSY60的旋转被传递至马达50,在马达50内产生感应电动势。马达50与控制部(未图示)连接,控制部根据感应电动势产生使马达50在反方向上旋转的旋转转矩。控制部产生与感应电动势成比例的旋转转矩。螺母ASSY60从马达50接受该旋转转矩而在反方向上旋转。由此,滚珠丝杠32在轴向上的移动(直进运动)衰减,悬架装置10的装置整体的振动(上下运动)得以抑制。
在滚珠丝杠螺母61的内周面设置有滚珠保持部件(未图示)。滚珠保持部件形成为圆筒状,滚珠保持部件的内径与滚珠丝杠32的外径大致相同。在滚珠保持部件的内周面以能够滚动且不能脱落的方式保持有多个滚珠(滚动体)。滚珠使滚珠丝杠螺母61与滚珠丝杠32稍微分离,使滚珠丝杠螺母61相对于滚珠丝杠32移位。
在滚珠丝杠32的外周面呈螺旋状地设置有螺纹槽(未图示)。螺纹槽例如形成为截面呈圆弧状,槽宽比较宽。保持于滚珠丝杠螺母61的多个滚珠进入滚珠丝杠32的螺纹槽中。多个滚珠沿着螺纹槽斜着滚动,由此,滚珠丝杠螺母61相对于滚珠丝杠32相对地旋转。螺母ASSY60通过被传递马达50的旋转转矩而绕轴旋转,产生抑制滚珠丝杠32的直进运动的衰减力。
在第二壳体43中收纳有马达50。作为马达50,使用中空马达。马达50的旋转转矩被传递至螺母ASSY60。
图3是图2中的轴支承有螺母ASSY60的部位的放大图。在第一壳体42的内侧配置有将螺母ASSY60轴支承为旋转自如的多个轴承47。在本实施方式中,2个轴承47沿轴向排列地配置。轴承47、47支承螺母ASSY60的基端侧。此外,在图3中,使用球轴承作为轴承47、47,但轴承例如也可以是滚子轴承、滑动轴承、磁轴承等。
在第一壳体42中收纳有从轴向两侧夹着轴承47、47的保持架(第一保持架48a以及第二保持架48b)。第一保持架48a配置于车轮侧,第二保持架48b配置于车体侧。第一保持架48a和第二保持架48b沿轴向观察时呈环状,且轴向截面(单侧)呈L字状。
在此,将第一壳体42中的车轮侧的壁部中的、与轴向正交的壁部作为第一壁部42a。另外,在壳体41设置有将第一壳体42与第二壳体43(图2)之间的一部分隔开且与轴向正交的第二壁部45。在轴向上,在第二壁部45(壳体)与第二保持架48b(轴承47)之间,绕轴遍及整周地形成有规定的间隙(设为空间α),在该间隙中配置有弹性体49(橡胶体)。另外,在轴向上,在第一壁部42a(壳体)与第一保持架48a(轴承47)之间,绕轴遍及整周地形成有规定的间隙(设为空间α),在该间隙中配置有弹性体49。弹性体49在沿轴向观察时呈环状,在径向以及轴向上具有规定的厚度(宽度)。弹性体49由橡胶等能够发生弹性变形的部件形成。
在径向(与轴正交的方向)上,在轴承47、47的外周面与圆筒状的第一壳体42的内周面42b之间遍及整周地形成有规定的间隙(设为间隙β)。在第一壳体42的内周面42b遍及整周地设置有朝向径向内侧突出规定的长度的限制部42c(承插部)。该限制部42c的末端部与轴承47、47的外周面的一部分接触。限制部42c被设置在与2个轴承47的边界部对应的位置,限制部42c的轴向长度为使得限制部42c与2个轴承47各自的外周面的一部分接触的长度。
在比配置有弹性体49的位置靠径向内侧且处于第二壁部45与第二保持架48b之间的位置设置有板状的金属部件46。在本实施方式中,金属部件46被固定于第二保持架48b,但也可以固定于第二壁部45。另外,在比配置有弹性体49的位置靠径向内侧且处于第一壁部42a与第一保持架48a之间的位置设置有板状的金属部件46。在本实施方式中,金属部件46被固定于第一保持架48a,但也可以固定于第一壁部42a。金属部件46具有规定的厚度,以板面与轴向正交的方式配置。金属部件46也可以称为机械紧固部、或金属连结部位。也可以在金属部件46与壳体41(第二壁部45或第一壁部42a)之间形成有微小的间隙。
图4是用于对滚珠丝杠32的倾斜进行说明的图。如图4所示,有时因组装时的精度等,滚珠丝杠32的轴与螺母ASSY60(滚珠丝杠螺母61)的轴错开。该情况下,在产生滚珠丝杠32扭动滚珠丝杠螺母61的力(撬动力)时,该反作用力可能施加于滚珠丝杠32而产生问题。
本实施方式的悬架装置10具备形成为圆筒状的阻尼器20,阻尼器20具备:滚珠丝杠32;滚珠丝杠螺母61,其与滚珠丝杠32螺合;轴承47,其将设置有滚珠丝杠螺母61的螺母单元(螺母ASSY60)支承为能够旋转;以及壳体41,其在内侧收纳轴承47,在壳体41与轴承47的轴向之间设置有弹性体49。由此,作为支承螺母ASSY60的螺母ASSY支承部的轴承47被弹性体49从轴向两侧夹住,因此,螺母ASSY支承部的支承刚性(针对撬动的刚性)降低。因此,即使是滚珠丝杠32相对于轴向倾斜、施加了撬动滚珠丝杠螺母61的力的情况下,弹性体49也会弹性变形而成为螺母ASSY60相对于轴向倾斜的姿态。因此,施加于滚珠丝杠32与滚珠丝杠螺母61的螺合部的负荷得以降低。
图5是用于对螺母ASSY60相对于轴向倾斜的状态进行说明的图,螺母ASSY60能够成为以轴承47侧为支点倾斜的姿态。也可以将其称为螺母ASSY60挠曲、螺母ASSY60弯曲等。由此,即使是滚珠丝杠螺母61的轴与滚珠丝杠32的轴错开的情况下,也通过螺母ASSY60倾斜来吸收撬动。
另外,螺母ASSY60的支承部的刚性降低,螺母ASSY60能够沿着轴向(滚珠丝杠32的直进方向)稍微移动。因此,在弹簧13伸长的方向和弹簧13收缩的方向中的任一方向上都能够缓和冲击力。
另外,通过设置作为缓和撬动的构造的弹性体49,由此,吸收并阻断了高频的振动,因此,能够降低工作噪音,并且能够提高车辆的乘坐舒适性。
另外,通过设置弹性体49,能够降低螺母ASSY60的支承部的刚性。在此,图6的(a)是表示未搭载滚珠丝杠撬动缓和构造时的图,图6的(b)是表示搭载滚珠丝杠撬动缓和构造时的图。通过设置滚珠丝杠撬动缓和构造,能够降低螺母ASSY60的支承部的刚性,能够降低成为工作噪音的主要原因的固有振动频率。由此,能够降低工作噪音。
另外,根据本实施方式,在壳体41与轴承47的径向之间设置有间隙β(图3)。
由此,能够防止弹性体49变形而螺母ASSY60倾斜时轴承47与壳体41的内周面42b接触。即,能够防止轴承47与内周面42b接触而妨碍螺母ASSY60的倾斜。由此,螺母ASSY60顺畅地倾斜而吸收撬动。
另外,根据本实施方式,在壳体41的内侧设置有与轴承47的外周面的一部分接触的限制部42c(图3)。
由此,在组装悬架装置10时,通过限制部42c对轴承47确定中心,因此,能够使轴承47的轴与壳体41的轴高精度地一致。换言之,能够实现轴承47的定心。由此,能够抑制轴错位的产生,从而提高产品的品质。
另外,根据本实施方式,在比配置有弹性体49的位置靠径向内侧且处于壳体41(第一壁部42a或第二壁部45)与轴承47之间的位置,设置有板状的金属部件46。
由此,通过在弹性体49与比弹性体49靠径向内侧且绕轴旋转的螺母ASSY60之间设置板状的金属部件46,从而能够防止螺母ASSY60咬入弹性体49。由此,能够防止因该咬入而产生不良情况。
另外,在将弹性体49被压缩而无法进一步变形的状态设为最大压缩状态时,在施加了在轴向上压缩弹性体49的力的情况下,在弹性体49成为最大压缩状态之前,金属部件46与壳体41(第一壁部42a或者第二壁部45)会接触。因此,当在轴向上施加了较大的力时,在弹性体49崩溃之前,金属部件彼此(金属部件46与壳体41)接触。由此,能够防止弹性体49的变形。
接下来,对筒单元30中的车轮侧(轮胎侧)的部分进行说明。图7是图2中的支承有滚珠丝杠32的部位的放大图。在外筒31(筒部)的车轮侧端部安装有金属制的紧固部件33(带轮)。紧固部件33是有底圆筒状的金属制部件,具备侧壁部33a和底部33b。紧固部件33的轴向截面呈コ字状。
侧壁部33a形成为沿着圆形形状的底部33b的外周呈环状设置并沿轴向延伸。侧壁部33a的外径比外筒31的内径小,侧壁部33a被插入到外筒31的内侧。
在底部33b设置有在轴向上贯通的贯通孔,滚珠丝杠32贯插于该贯通孔中。紧固部件33在使滚珠丝杠32贯插于其内侧的状态下安装于外筒31的车轮侧端部。
在滚珠丝杠32的车轮侧端部紧固有固定部件70。作为固定部件70而使用螺母。滚珠丝杠32的端部通过用固定部件70紧固而固定于紧固部件33。换言之,固定部件70将滚珠丝杠32固定于紧固部件33。被紧固的固定部件70与紧固部件33接触。
在外筒31的车轮侧内部收纳有弹性部件71(衬套)。弹性部件71的外径比外筒31的内径小,且比紧固部件33的侧壁部33a的内径小。弹性部件71具有在轴向上贯通的孔,成为在内侧贯插滚珠丝杠32的中空部件。弹性部件71由橡胶等形成为能够弹性变形,在外筒31向轴向车体侧移动使得弹性部件71与内筒44(图2)的端部接触时,弹性部件71发生弹性变形。通过该弹性部件71的弹性变形来吸收冲击。
弹性部件71被收纳于紧固部件33的侧壁部33a的内侧。换言之,侧壁部33a支承着贯插有滚珠丝杠32的弹性部件71。
图8是图7中的滚珠丝杠32贯插于紧固部件33中的部位的放大图。在此,将滚珠丝杠32贯插于紧固部件33的部位作为贯插部E。贯插部E也可以说是滚珠丝杠32贯通紧固部件33的部位。
在贯插部E设置有滚珠丝杠32与紧固部件33相嵌合的嵌合部F。在本实施方式中,嵌合部F为花键嵌合构造。虽然省略图示,但在嵌合部F中,在滚珠丝杠32的外周面,在周向上每隔规定的间隔形成有沿着轴向延伸规定的长度的齿(外花键)。齿朝向径向外侧突出。另外,虽然省略图示,但在嵌合部F中,在紧固部件33的内周面,在周向上每隔规定的间隔形成有沿轴向延伸规定的长度的槽(内花键)。作为外花键以及内花键的形状,例如有截面呈梯形的形状、截面呈三角形的形状,外花键与内花键相互啮合。换言之,在嵌合部F中,滚珠丝杠32的齿与紧固部件33的槽成为啮合的状态。由此,成为滚珠丝杠32的旋转被紧固部件33限制的状态。
在贯插部E处,设置有滚珠丝杠32的外周面与紧固部件33的内周面进行面接触的抵接部G。抵接部G设置在比嵌合部F靠车轮侧的位置。在抵接部G中,滚珠丝杠32的外周面在轴向上以随着靠向车轮侧而处于径向内侧的方式倾斜。另外,在抵接部G中,紧固部件33的内周面在轴向上以随着靠向车轮侧而处于径向内侧的方式倾斜。换言之,在抵接部G中,滚珠丝杠32的外周面(座面)与紧固部件33的内周面(座面)均为锥形。在抵接部G中,滚珠丝杠32的外周面与紧固部件33的内周面进行面接触,接触面相对于轴向倾斜。具体而言,接触面以越是沿轴向从车体侧靠向车轮侧(设置有固定部件70的一侧)越是处于径向内侧的方式倾斜。
如以上说明那样,本实施方式的悬架装置10具备形成为圆筒状的阻尼器20,阻尼器20具备:筒部(外筒31);滚珠丝杠32,其收纳于筒部(外筒31)中;紧固部件33,其对滚珠丝杠32以使滚珠丝杠32贯插于内侧的状态进行支承,该紧固部件33被安装于筒部(外筒31)的端部;以及固定部件70,其安装于滚珠丝杠32的端部,将滚珠丝杠32固定于紧固部件33,在滚珠丝杠32贯插于紧固部件33中的贯插部E处,设置有滚珠丝杠32与紧固部件33相嵌合的嵌合部F,嵌合部F为花键嵌合构造。
由此,通过设置嵌合部F,将嵌合部F形成为花键嵌合构造,基于滚珠丝杠32的旋转的转矩传递至紧固部件33,能够防止该转矩传递至固定部件70。由此,能够抑制基于滚珠丝杠32的旋转的转矩传递至固定部件70而使固定部件70的固定松动,能够抑制滚珠丝杠32的轴错位。因此,能够抑制基于滚珠丝杠32的轴错位而施加负荷,抑制部件劣化。换言之,能够提供抑制了滚珠丝杠32的轴错位导致的部件劣化的悬架装置。
图9中的(a)示出了不具备作为花键嵌合构造的嵌合部F的情况,图9中的(b)示出了具备作为花键嵌合构造的嵌合部F的情况。图中的粗线表示转矩传递路径T。如图9的(a)所示,在不具备嵌合部F的情况下,基于滚珠丝杠32的旋转的转矩施加于固定部件70。换言之,基于滚珠丝杠32的旋转的转矩会经过固定部件70。因此,产生固定部件70的固定松动、滚珠丝杠32的轴错位这样的问题。
另一方面,如图9的(b)所示,在具备嵌合部F的情况下,基于滚珠丝杠32的旋转的转矩直接传递至作为滚珠丝杠32的嵌合对象的紧固部件33,该转矩不会经过固定部件70。因此,能够抑制固定部件70的固定松动,从而抑制滚珠丝杠32的轴错位。
另外,根据本实施方式,在贯插部E处设置有滚珠丝杠32的外周面与紧固部件33的内周面进行面接触的抵接部G,抵接部G的接触面以越是沿着轴向靠向设置有固定部件70的一侧越是处于径向内侧的方式倾斜。
由此,当在组装时将滚珠丝杠32插入到紧固部件33的内侧时,滚珠丝杠32被引导,能够使滚珠丝杠32的轴与紧固部件33的轴高精度地一致。换言之,能够实现滚珠丝杠32的定心。由此,使滚珠丝杠32与紧固部件33进行花键嵌合时的组装性稳定,能够提高生产率。另外,抵接部G也作为在轴向上施加力时受力的承受面发挥功能,通过由抵接部G受力,由此,能够降低施加于其他部位的负荷。
另外,根据本实施方式,紧固部件33具备在轴向上延伸且插入到筒部(外筒31)的内侧的环状的侧壁部33a,侧壁部33a支承着贯插有滚珠丝杠32的弹性部件71。
由此,即使是滚珠丝杠32产生了撬动弹性部件71的力的情况下,由于设置有侧壁部33a,因此也能够抑制撬动。即,抑制滚珠丝杠32倾斜。因此,能够抑制滚珠丝杠32倾斜而使基于滚珠丝杠32的旋转的转矩传递向不希望的方向。例如,能够抑制该转矩传递到固定部件70而使固定部件70的固定松动。因此,能够抑制因固定部件70的固定松动而使滚珠丝杠32的轴错位,能够抑制对部件施加负荷而造成部件劣化。
以上,根据实施方式对本发明进行了说明,但本发明并不限定于本实施方式。只不过例示了针对下述所示的本发明的实施方式,因此,能够在不脱离本发明的主旨的范围内任意地进行变更以及应用。
此外,本发明如下所述。
(结构1)一种悬架装置,其具备阻尼器,其特征在于,所述阻尼器具备:筒部;滚珠丝杠,其收纳于所述筒部中;紧固部件,其对所述滚珠丝杠以使该滚珠丝杠贯插于内侧的状态进行支承,该紧固部件被安装于所述筒部的端部;以及固定部件,其安装于所述滚珠丝杠的端部,将所述滚珠丝杠固定于所述紧固部件,在所述滚珠丝杠贯插于所述紧固部件的贯插部处,设有所述滚珠丝杠与所述紧固部件相嵌合的嵌合部,所述嵌合部为花键嵌合构造。
根据该结构,能够抑制基于滚珠丝杠的旋转的转矩传递至固定部件而使固定部件的固定松动,能够滚珠丝杠的轴错位。因此,能够抑制基于滚珠丝杠的轴错位而施加负荷,能够抑制部件劣化。换言之,能够提供抑制了基于滚珠丝杠的轴错位的部件劣化的悬架装置。
(结构2)根据结构1所述的悬架装置,其特征在于,在所述贯插部处设置有所述滚珠丝杠的外周面与所述紧固部件的内周面进行面接触的抵接部,所述抵接部的接触面以沿着轴向越是靠向设置有所述固定部件的一侧越是处于径向内侧的方式倾斜。
根据该结构,能够使滚珠丝杠的轴与紧固部件的轴高精度地一致。由此,将滚珠丝杠与紧固部件进行花键嵌合时的组装性稳定,能够提高生产率。
(结构3)根据结构1或结构2所述的悬架装置,其特征在于,所述紧固部件具备在轴向上延伸且被插入于所述筒部的内侧的环状的侧壁部,所述侧壁部支承着贯插有所述滚珠丝杠的弹性部件。
根据该结构,通过侧壁部抑制滚珠丝杠倾斜,能够抑制因滚珠丝杠倾斜而使基于滚珠丝杠的旋转的转矩传递向不希望的方向。例如能够抑制该转矩传递至固定部件而使固定部件的固定松动。因此,能够抑制因固定部件的固定松动而使滚珠丝杠的轴错位,能够抑制对部件施加负荷而造成部件劣化。
Claims (3)
1.一种悬架装置,其具备阻尼器,其特征在于,
所述阻尼器具备:筒部;滚珠丝杠,其收纳于所述筒部中;紧固部件,其对所述滚珠丝杠以使该滚珠丝杠贯插于内侧的状态进行支承,该紧固部件被安装于所述筒部的端部;以及固定部件,其安装于所述滚珠丝杠的端部,将所述滚珠丝杠固定于所述紧固部件,
在所述滚珠丝杠贯插于所述紧固部件的贯插部处,设有所述滚珠丝杠与所述紧固部件嵌合的嵌合部,所述嵌合部为花键嵌合构造。
2.根据权利要求1所述的悬架装置,其特征在于,
在所述贯插部设置有所述滚珠丝杠的外周面与所述紧固部件的内周面进行面接触的抵接部,
所述抵接部的接触面以沿着轴向越是靠向设置有所述固定部件的一侧越是处于径向内侧的方式倾斜。
3.根据权利要求1或2所述的悬架装置,其特征在于,
所述紧固部件具备在轴向上延伸且被插入于所述筒部的内侧的环状的侧壁部,
所述侧壁部支承着贯插有所述滚珠丝杠的弹性部件。
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