CN211009576U - Ball Spline - Google Patents

Ball Spline Download PDF

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CN211009576U
CN211009576U CN201921838143.4U CN201921838143U CN211009576U CN 211009576 U CN211009576 U CN 211009576U CN 201921838143 U CN201921838143 U CN 201921838143U CN 211009576 U CN211009576 U CN 211009576U
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distance
retainer
bosses
spline shaft
rolling
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蔡宗宪
陈明峰
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Hiwin Technologies Corp
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Hiwin Technologies Corp
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Abstract

A ball spline comprises a spline shaft and a nut, wherein the nut protrudes from a first boss on the inner ring surface of the spline shaft. The retainer is sleeved on the spline shaft and provided with second bosses, and the second bosses and the first bosses are arranged in a staggered mode and protrude out of the first bosses. And rolling members circulating between the nut, the spline shaft and the retainer. And the dustproof sheet is sleeved on the spline shaft and positioned at two sides of the retainer. The dustproof sheet protrudes out of the positioning parts, and the positioning parts are respectively arranged between the second bosses. Therefore, the positioning parts are respectively arranged between the second bosses, so that the rotation of the dustproof sheet relative to the spline shaft can be limited, the deviation of the dustproof sheet is reduced, and the assembly efficiency of the dustproof sheet is improved.

Description

滚珠花键Ball Spline

技术领域technical field

本实用新型涉及线性传动装置,尤其涉及一种滚珠花键。The utility model relates to a linear transmission device, in particular to a ball spline.

背景技术Background technique

一般的滚珠花键,如中国台湾第M558856号专利,包含一花键轴、一螺帽、一保持器、多个滚珠、两个防尘元件和两个限位环。螺帽套设在花键轴,保持器设置在花键轴和螺帽之间配合螺帽滚珠槽让滚珠在内循环。在螺帽内,保持器两侧分别盖设防尘元件,并通过限位环将防尘元件限制在螺帽内。A general ball spline, such as Taiwan Patent No. M558856, includes a spline shaft, a nut, a retainer, a plurality of balls, two dust-proof elements and two limit rings. The nut is sleeved on the spline shaft, and the retainer is arranged between the spline shaft and the nut to cooperate with the ball groove of the nut to circulate the balls inside. In the nut, the two sides of the retainer are respectively covered with dust-proof elements, and the dust-proof elements are limited in the nut by a limit ring.

然而,前述设计中的防尘元件仍具有需要改善的地方。其一,防尘片的防尘凸部伸入花键轴的滚珠槽,在防尘元件的安装过程中若是防尘凸部偏位,会使得防尘凸部在滚珠槽内与花键轴摩擦并施力于花键轴,对花键轴产生异常的阻力,具有不易安装的缺点。此外,该防尘元件的防尘凸部在轴向突出于贴合面,如此一来,须采用无设置扣耳的限位环才能闪躲过防尘凸部外围而嵌入螺帽,然而此种扣环无论在装设或拆卸都相当不便,使得防尘元件组装效率降低。However, the dustproof elements in the aforementioned designs still have room for improvement. First, the dust-proof convex part of the dust-proof sheet extends into the ball groove of the spline shaft. If the dust-proof convex part is deviated during the installation of the dust-proof element, the dust-proof convex part will be in contact with the spline shaft in the ball groove. It rubs and exerts force on the spline shaft, which produces abnormal resistance to the spline shaft, and has the disadvantage of being difficult to install. In addition, the dust-proof protrusion of the dust-proof element protrudes from the contact surface in the axial direction. As a result, a limit ring without buckle ears can be used to avoid the periphery of the dust-proof protrusion and insert the nut. However, such a The retaining ring is quite inconvenient to assemble or disassemble, which reduces the assembly efficiency of the dustproof element.

实用新型内容Utility model content

本实用新型的主要目的在于提供一种滚珠花键,其可提升防尘元件的组装效率及防止防尘元件组装后防尘凸部偏位的情形。The main purpose of the present invention is to provide a ball spline, which can improve the assembly efficiency of the dust-proof element and prevent the dust-proof convex portion from being displaced after the dust-proof element is assembled.

依据本实用新型所提供的一种滚珠花键,包含:一花键轴;一螺帽,套设在该花键轴,该螺帽具有一内环面,该螺帽在该内环面突出多个第一凸台;一保持器,套设在该花键轴且位于该花键轴和该螺帽之间,该保持器具有多个第二凸台,各该第二凸台与各该第一凸台交错设置且突出各该第一凸台;多个滚动件,在该螺帽、该花键轴及该保持器之间循环流动;多个防尘片,各该防尘片套设在该花键轴且位于该保持器两侧;其特征在于:该防尘片突出多个定位部,各该定位部分别设于各该第二凸台之间。A ball spline provided according to the present utility model comprises: a spline shaft; a nut sleeved on the spline shaft, the nut has an inner annular surface, and the nut protrudes from the inner annular surface a plurality of first bosses; a retainer sleeved on the spline shaft and located between the spline shaft and the nut, the retainer has a plurality of second bosses, each of the second bosses and each The first bosses are staggered and protrude from each of the first bosses; a plurality of rolling elements circulate among the nut, the spline shaft and the retainer; a plurality of dustproof sheets, each of the dustproof sheets The utility model is sleeved on the spline shaft and located on both sides of the retainer; it is characterized in that: the dustproof sheet protrudes a plurality of positioning parts, and each positioning part is respectively arranged between each of the second bosses.

借此,各该定位部分别设于各该第二凸台之间能够限制该防尘片相对该花键轴转动减少防尘片唇部偏位,且通过各该定位部可以提升防尘片的组装效率。Thereby, the positioning portions are respectively arranged between the second bosses to limit the rotation of the dust-proof sheet relative to the spline shaft to reduce the deviation of the lips of the dust-proof sheet, and the dust-proof sheet can be lifted through the positioning portions assembly efficiency.

值得一提的是,还可以让各该定位部分别顶抵各该第二凸台。借此增强该防尘片的定位稳定性。It is worth mentioning that, each of the positioning portions can also be pressed against each of the second bosses, respectively. Thereby, the positioning stability of the dustproof sheet is enhanced.

此外,若让该防尘片具有一外环体和一内环体,该外环体设于该滚珠保持器,该内环体叠设于该外环体,各该定位部形成于该外环体,各该唇部形成于该内环体。该内环体于各该唇部的相对侧朝内形成相连的一第一凹部、一第二凹部和一第三凹部。该第一凹部和该轴心的最短距离为一第一距离;该第二凹部和该轴心的最短距离为一第二距离;该第三凹部和该轴心的最短距离为一第三距离;该滚珠花键还包含多个C型扣环,该螺帽两端各形成一环沟,各该C型扣环分别卡掣在该螺帽的各该环沟内,各该C型扣环嵌入该螺帽的各该环沟时内圆周的最小直径为一扣环内径;该第二距离小于该扣环内径的一半;该第一距离和该第三距离小于该扣环内径的一半且大于该第二距离。组装C型扣环时,通过该第一凹部、该第二凹部和该第三凹部的设置,躲过C型扣环的扣耳,进而避免C型扣环干涉防尘片,且如此设计可以采用具有扣耳的C型扣环,组装时可以采用扣环钳,增进组装效率。In addition, if the dust-proof sheet has an outer ring body and an inner ring body, the outer ring body is arranged on the ball cage, the inner ring body is stacked on the outer ring body, and the positioning portions are formed on the outer ring body. a ring body, each of the lips is formed on the inner ring body. The inner ring body forms a first concave portion, a second concave portion and a third concave portion connected inwardly on opposite sides of the lip portions. The shortest distance between the first recess and the axis is a first distance; the shortest distance between the second recess and the axis is a second distance; the shortest distance between the third recess and the axis is a third distance ; The ball spline also includes a plurality of C-shaped retaining rings, each of which forms a ring groove at both ends of the nut, and each of the C-shaped retaining rings is clamped in each of the ring grooves of the nut, and each of the C-shaped buckles The minimum diameter of the inner circumference when the ring is inserted into each of the ring grooves of the nut is an inner diameter of a retaining ring; the second distance is less than half of the inner diameter of the retaining ring; the first distance and the third distance are less than half of the inner diameter of the retaining ring and greater than the second distance. When assembling the C-shaped retaining ring, through the arrangement of the first recess, the second recess and the third recess, the ears of the C-shaped retaining ring are avoided, thereby preventing the C-shaped retaining ring from interfering with the dustproof sheet. The C-shaped buckle with buckle ears is adopted, and the buckle pliers can be used during assembly to improve the assembly efficiency.

值得一提的是,该第一凹部、该第二凹部或该第三凹部的底部呈平面,使得加工较为有效率。It is worth mentioning that the bottom of the first concave portion, the second concave portion or the third concave portion is flat, so that the processing is more efficient.

还须说明的是,沿着该内环体各该唇部彼此相邻一长间距和一短间距,该第二凹部位于各该短间距之间,或者使得该第二凹部位于各该长间距之间。上述设计,都能够达成躲过C型扣环的扣耳,进而避免C型扣环干涉防尘片的效果。It should also be noted that, along the inner ring body, the lips are adjacent to each other by a long distance and a short distance, and the second recess is located between the short distances, or the second recess is located at the long distances. between. All of the above designs can avoid the buckle ears of the C-shaped buckle, thereby avoiding the effect of the C-shaped buckle interfering with the dustproof sheet.

较佳地,该花键轴具有多个沿着一轴心延伸的第一滚动槽,各该第一凸台具有多个第二滚动槽,该保持器于各该第二凸台之间具有多个第三滚动槽,各该第三滚动槽穿透该保持器,且各该第三滚动槽分别与该第一滚动槽和该第二滚动槽形成一负荷路径,该保持器在各该第二凸台具有多个回流槽,各该回流槽分别连通各该第三滚动槽,该负荷路径及该些回流槽形成一循环路径供各该滚动件循环流动,各该防尘片突出多个唇部,各该唇部分别伸入各该第一滚动槽。Preferably, the spline shaft has a plurality of first rolling grooves extending along an axis, each of the first bosses has a plurality of second rolling grooves, and the retainer has a plurality of second rolling grooves between each of the second bosses. a plurality of third rolling grooves, each of the third rolling grooves penetrates the retainer, and each of the third rolling grooves forms a load path with the first rolling groove and the second rolling groove respectively, the retainer is in each of the The second boss has a plurality of return grooves, and each of the return grooves is connected to each of the third rolling grooves. The load path and the return grooves form a circulation path for each of the rolling elements to circulate, and each of the dustproof sheets protrudes more. and each of the lips respectively extends into each of the first rolling grooves.

附图说明Description of drawings

图1为本实用新型较佳实施例的立体图;1 is a perspective view of a preferred embodiment of the present utility model;

图2为本实用新型较佳实施例的立体分解图;2 is an exploded perspective view of a preferred embodiment of the present utility model;

图3为本实用新型较佳实施例的部分立体图,显示无花键轴的情况;Figure 3 is a partial perspective view of the preferred embodiment of the present invention, showing the situation without the spline shaft;

图4为本实用新型较佳实施例的部分侧视图,显示螺帽和保持器;Figure 4 is a partial side view of the preferred embodiment of the present invention, showing the nut and retainer;

图5为本实用新型较佳实施例的剖视图,显示螺帽内结构;5 is a cross-sectional view of a preferred embodiment of the present invention, showing the inner structure of the nut;

图6为本实用新型较佳实施例的部分侧视图,显示防尘片和C型扣环搭配;6 is a partial side view of the preferred embodiment of the present invention, showing the matching of the dust-proof sheet and the C-shaped buckle;

图7为本实用新型较佳实施例的部分立体图,显示第二凹部位于各长间距之间;FIG. 7 is a partial perspective view of the preferred embodiment of the present invention, showing that the second concave portion is located between the long intervals;

图8为本实用新型较佳实施例的部分立体图,显示第二凹部位于各短间距之间。FIG. 8 is a partial perspective view of the preferred embodiment of the present invention, showing that the second concave portion is located between the short distances.

【附图标记说明】[Description of reference numerals]

10 滚珠花键10 Ball Splines

11 花键轴 111 第一滚动槽11 Spline shaft 111 First rolling groove

12 螺帽 121 内环面12 Nut 121 Inner ring

122 第一凸台 123 第二滚动槽122 The first boss 123 The second rolling groove

124 环沟 13 保持器124 Ring groove 13 Retainer

131 第二凸台 132 第三滚动槽131 Second boss 132 Third rolling groove

133 回流槽 134 导引部133 Reflow tank 134 Guide

15 防尘片 15a 外环体15 Dust-proof sheet 15a Outer ring body

15b 内环体 151 唇部15b Inner ring 151 Lip

152 定位部 153 第一凹部152 Positioning part 153 First recessed part

154 第二凹部 155 第三凹部154 Second recess 155 Third recess

16C 型扣环 161 扣耳16C Buckle 161 Buckle

A 轴心 L 长间距A Axis L Long Pitch

S 短间距 P 负荷路径S Short Pitch P Load Path

D1 第一距离 D2 第二距离D1 first distance D2 second distance

D3 第三距离 D4 扣环内径D3 Third distance D4 Ring inner diameter

具体实施方式Detailed ways

为了详细说明本实用新型的技术特点所在,现列举以下的较佳实施例并配合附图说明如下,其中:In order to illustrate the technical features of the present utility model in detail, the following preferred embodiments are now listed and described in conjunction with the accompanying drawings as follows, wherein:

如图1-8所示,本实用新型一较佳实施例所提供的一种滚珠花键10,包含一花键轴11、一螺帽12、一保持器13、多个滚动件(图中未显示)、多个防尘片15、多个C型扣环16。As shown in Figures 1-8, a ball spline 10 provided by a preferred embodiment of the present utility model includes a spline shaft 11, a nut 12, a retainer 13, and a plurality of rolling elements (in the figure (not shown), a plurality of dustproof sheets 15, and a plurality of C-shaped retaining rings 16.

该花键轴11,具有多个沿着一轴心A延伸的第一滚动槽111。The spline shaft 11 has a plurality of first rolling grooves 111 extending along an axis A.

该螺帽12,套设在该花键轴11,该螺帽12具有一内环面121,该螺帽12在该内环面121突出多个第一凸台122,各该第一凸台122具有多个第二滚动槽123,该螺帽12两端各形成一环沟124。The nut 12 is sleeved on the spline shaft 11 , the nut 12 has an inner annular surface 121 , and a plurality of first bosses 122 protrude from the inner annular surface 121 of the nut 12 . The nut 122 has a plurality of second rolling grooves 123 , and a ring groove 124 is formed at both ends of the nut 12 .

请参阅图2、3和4。该保持器13,套设在该花键轴11且位于该花键轴11和该螺帽12之间,该保持器13具有多个第二凸台131,各该第二凸台131与各该第一凸台122交错设置且突出各该第一凸台122。该保持器13在各该第二凸台131之间具有多个第三滚动槽132,各该第三滚动槽132穿透该保持器13,且各该第三滚动槽132分别与该第一滚动槽111和该第二滚动槽123形成一负荷路径P。该保持器13在各该第二凸台131具有多个回流槽133,各该回流槽133分别连通各该第三滚动槽132。该保持器13在各该回流槽133和各该第三滚动槽132交界处朝内突出一导引部134,各该导引部134分别伸入该花键轴11的第一滚动槽111,用来导引滚动件的运作方向。See Figures 2, 3 and 4. The retainer 13 is sleeved on the spline shaft 11 and located between the spline shaft 11 and the nut 12 , the retainer 13 has a plurality of second bosses 131 , and each of the second bosses 131 is connected to each of the second bosses 131 . The first bosses 122 are staggered and protrude from the first bosses 122 . The retainer 13 has a plurality of third rolling grooves 132 between each of the second bosses 131 , each of the third rolling grooves 132 penetrates the retainer 13 , and each of the third rolling grooves 132 is connected to the first The rolling groove 111 and the second rolling groove 123 form a load path P. The retainer 13 has a plurality of recirculation grooves 133 on each of the second bosses 131 , and each of the recirculation grooves 133 communicates with each of the third rolling grooves 132 respectively. The retainer 13 protrudes inwardly with a guide portion 134 at the junction of each of the return grooves 133 and each of the third rolling grooves 132 , and each of the guide portions 134 respectively extends into the first rolling groove 111 of the spline shaft 11 , Used to guide the running direction of the rolling element.

各该滚动件(图中未显示),设置在该第三滚动槽132和该回流槽133内,且该负荷路径及该些回流槽133形成一循环路径供各该滚动件循环流动。Each of the rolling elements (not shown in the figure) is disposed in the third rolling groove 132 and the return groove 133 , and the load path and the return grooves 133 form a circulation path for the rolling elements to circulate.

请参阅图1,各该防尘片15,套设在该花键轴11且位于该保持器13两侧,各该防尘片15突出多个唇部151,各该唇部151分别伸入各该第一滚动槽111,用来阻挡粉尘或异物进入该螺帽12和该保持器13。Please refer to FIG. 1 , each of the dustproof sheets 15 is sleeved on the spline shaft 11 and located on both sides of the retainer 13 , each of the dustproof sheets 15 protrudes from a plurality of lips 151 , and each of the lips 151 respectively protrudes into Each of the first rolling grooves 111 is used to prevent dust or foreign matter from entering the nut 12 and the retainer 13 .

各该C型扣环16两端分别具有一扣耳161,分别卡掣在该螺帽12的各该环沟124内,防止该保持器13和各该防尘片15脱出该螺帽12。The two ends of each C-shaped retaining ring 16 are respectively provided with a retaining ear 161 , which are respectively clamped in each of the grooves 124 of the nut 12 to prevent the retainer 13 and each of the dustproof sheets 15 from coming out of the nut 12 .

本实施例的特征在于:该防尘片15突出多个定位部152,各该定位部152分别设于各该第二凸台131之间。The feature of this embodiment is that the dustproof sheet 15 protrudes from a plurality of positioning portions 152 , and the positioning portions 152 are respectively disposed between the second bosses 131 .

通过各该定位部152分别设于各该第二凸台131之间,能够限制该防尘片15相对该花键轴11转动减少防尘片15唇部151偏位,进而避免各该唇部151在该第一滚动槽111内施力于该花键轴11,对该花键轴11产生推力阻碍运作,且通过各该定位部可以提升防尘片的组装效率。Since the positioning portions 152 are respectively disposed between the second bosses 131, the rotation of the dustproof sheet 15 relative to the spline shaft 11 can be restricted to reduce the deviation of the lips 151 of the dustproof sheet 15, thereby preventing the lip portions The 151 exerts force on the spline shaft 11 in the first rolling groove 111 , which generates thrust on the spline shaft 11 to hinder the operation, and the assembling efficiency of the dustproof sheet can be improved through the positioning portions.

除此之外,还可以让各该定位部152分别顶抵各该第二凸台131,通过分别对各该第二凸台131施力增强该防尘片15的定位稳定性。In addition, each of the positioning portions 152 can be pressed against each of the second bosses 131 respectively, and the positioning stability of the dustproof sheet 15 can be enhanced by applying force to each of the second bosses 131 respectively.

还须说明的是,在本实施例中,该防尘片15具有一外环体15a和一内环体15b,该外环体15a设于该保持器13,该内环体15b叠设于该外环体15a,各该定位部152形成于该外环体15a,各该唇部151形成于该内环体15b。It should also be noted that, in this embodiment, the dustproof sheet 15 has an outer ring body 15a and an inner ring body 15b, the outer ring body 15a is arranged on the holder 13, and the inner ring body 15b is stacked on the holder 13. The outer ring body 15a, the positioning portions 152 are formed on the outer ring body 15a, and the lip portions 151 are formed on the inner ring body 15b.

请参阅图6-8。该内环体15b在各该唇部151的相对侧具有一第一凹部153、一第二凹部154和一第三凹部155。该第一凹部153和该轴心A的最短距离为一第一距离D1。该第二凹部154和该轴心A的最短距离为一第二距离D2。该第三凹部155和该轴心A的最短距离为一第三距离D3。须说明的是,当该C型扣环16嵌入该螺帽12时内圆周的最小直径为一扣环内径D4。该第二距离D2小于该扣环内径D4的一半。该第一距离D1和该第三距离D3则小于该扣环内径D4的一半且大于该第二距离D2。另须说明的是,在本实施例中,该第一凹部153、该第二凹部154或该第三凹部155的底部呈平面,使得加工较为有效率。See Figure 6-8. The inner ring body 15b has a first recess 153 , a second recess 154 and a third recess 155 on opposite sides of the lips 151 . The shortest distance between the first recess 153 and the axis A is a first distance D1. The shortest distance between the second recess 154 and the axis A is a second distance D2. The shortest distance between the third recess 155 and the axis A is a third distance D3. It should be noted that when the C-shaped retaining ring 16 is inserted into the nut 12, the minimum diameter of the inner circumference is a retaining ring inner diameter D4. The second distance D2 is less than half of the inner diameter D4 of the retaining ring. The first distance D1 and the third distance D3 are less than half of the inner diameter D4 of the retaining ring and greater than the second distance D2. It should be noted that, in this embodiment, the bottoms of the first concave portion 153 , the second concave portion 154 or the third concave portion 155 are flat, so that the processing is more efficient.

在组装C型扣环16时,通过该第一凹部153、该第二凹部154和该第三凹部155的设置,躲过C型扣环16的扣耳161,进而避免组装后C型扣环16干涉该防尘片15,因此相较先前技术,使用者可以操作扣环钳来组装C型扣环,增进组装效率。When assembling the C-shaped retaining ring 16, the first concave portion 153, the second concave portion 154 and the third concave portion 155 are arranged to avoid the buckle ears 161 of the C-shaped retaining ring 16, thereby avoiding the assembled C-shaped retaining ring. 16 interferes with the dust-proof sheet 15, so compared with the prior art, the user can operate the clasp pliers to assemble the C-shaped clasp, which improves the assembly efficiency.

还请参阅图7、8。沿着该内环体15b各该唇部151彼此相邻一长间距L和一短间距S,该第二凹部154位于各该短间距S之间,或者使得该第二凹部154位于各该长间距L之间。上述设计,都能够达成躲过C型扣环16的扣耳161,进而减少组装后C型扣环16干涉防尘片15的效果。See also Figures 7 and 8. Along the inner ring body 15b, the lips 151 are adjacent to each other by a long distance L and a short distance S, the second concave part 154 is located between the short distance S, or the second concave part 154 is located between the long distance S between the distances L. All of the above designs can avoid the buckle ears 161 of the C-shaped retaining ring 16 , thereby reducing the effect of the C-shaped retaining ring 16 interfering with the dustproof sheet 15 after assembly.

以上所述的具体实施例,对本实用新型的目的、技术方案和有益效果进行了进一步详细说明,应理解的是,以上所述仅为本实用新型的具体实施例而已,并不用于限制本实用新型,凡在本实用新型的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本实用新型的保护范围之内。The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims (7)

1. A ball spline comprises a spline shaft; the nut is sleeved on the spline shaft and provided with an inner ring surface, and a plurality of first bosses protrude from the inner ring surface; the retainer is sleeved on the spline shaft and positioned between the spline shaft and the nut, the retainer is provided with a plurality of second bosses, and the second bosses and the first bosses are arranged in a staggered manner; a plurality of rolling members that circulate among the nut, the spline shaft, and the retainer; the dustproof sheets are sleeved on the spline shaft and positioned on two sides of the retainer; the method is characterized in that:
the dustproof sheet protrudes out of a plurality of positioning parts, and each positioning part is respectively arranged between the second bosses.
2. The ball spline of claim 1, wherein: each positioning part is respectively propped against each second boss.
3. The ball spline of claim 1, wherein: the dustproof sheet is provided with an outer ring body and an inner ring body, the outer ring body is arranged on the ball retainer, the inner ring body is overlapped on the outer ring body, each positioning part is formed on the outer ring body, and each lip part is formed on the inner ring body; the inner ring body is provided with a first concave part, a second concave part and a third concave part which are connected at the opposite sides of each lip part; the shortest distance between the first concave part and the axle center is a first distance; the shortest distance between the second concave part and the axis is a second distance; the shortest distance between the third concave part and the axle center is a third distance; the ball spline also comprises a plurality of C-shaped retaining rings, two ends of the screw cap respectively form a ring groove, each C-shaped retaining ring is clamped in each ring groove of the screw cap respectively, and the minimum diameter of the inner circumference when each C-shaped retaining ring is embedded into each ring groove of the screw cap is the inner diameter of the retaining ring; the second distance is less than half of the inner diameter of the retaining ring; the first distance and the third distance are less than half of the inner diameter of the retaining ring and greater than the second distance.
4. The ball spline of claim 3, wherein: the bottom of the first concave part, the second concave part or the third concave part is a plane.
5. The ball spline of claim 3, wherein: the lips are adjacent to each other along the inner ring at a long distance and a short distance, and the second recess is located between the short distances.
6. The ball spline of claim 3, wherein: the lips are adjacent to each other along the inner ring at a long distance and a short distance, and the second recess is located between the long distances.
7. The ball spline of claim 1, wherein: the spline shaft is provided with a plurality of first rolling grooves extending along a shaft center, each first boss is provided with a plurality of second rolling grooves, the retainer is provided with a plurality of third rolling grooves between the second bosses, each third rolling groove penetrates through the retainer, each third rolling groove and the first rolling groove and the second rolling groove form a load path, the retainer is provided with a plurality of backflow grooves at each second boss, each backflow groove is communicated with each third rolling groove, the load path and the backflow grooves form a circulating path for each rolling element to circularly flow, each dustproof sheet protrudes out of a plurality of lips, and each lip extends into each first rolling groove.
CN201921838143.4U 2019-10-29 2019-10-29 Ball Spline Active CN211009576U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201921838143.4U CN211009576U (en) 2019-10-29 2019-10-29 Ball Spline

Publications (1)

Publication Number Publication Date
CN211009576U true CN211009576U (en) 2020-07-14

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Country Link
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