WO2015100944A1 - 一种滚珠花键副 - Google Patents

一种滚珠花键副 Download PDF

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Publication number
WO2015100944A1
WO2015100944A1 PCT/CN2014/079285 CN2014079285W WO2015100944A1 WO 2015100944 A1 WO2015100944 A1 WO 2015100944A1 CN 2014079285 W CN2014079285 W CN 2014079285W WO 2015100944 A1 WO2015100944 A1 WO 2015100944A1
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WO
WIPO (PCT)
Prior art keywords
spline
cavity
cylindrical
sleeve
ball
Prior art date
Application number
PCT/CN2014/079285
Other languages
English (en)
French (fr)
Inventor
汤秀清
Original Assignee
广州市昊志机电股份有限公司
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Filing date
Publication date
Application filed by 广州市昊志机电股份有限公司 filed Critical 广州市昊志机电股份有限公司
Publication of WO2015100944A1 publication Critical patent/WO2015100944A1/zh

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Classifications

    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0692—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque
    • F16C29/0695—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque with balls

Definitions

  • the present invention relates to a ball spline pair.
  • ball spline pairs are often used in automation systems and other systems with high sensitivity and high reliability for linear motion and torque transfer.
  • the authorization bulletin number CN2856565Y discloses an end cap type returning scroll spline pair, which is composed of a spline shaft, a spline sleeve and a steel ball.
  • the spline is sleeved on the spline shaft, and is located on the spline shaft and located in the flower.
  • the return sleeve is respectively provided on the two sides of the key sleeve, the return hole is arranged on the spline sleeve, the groove is arranged on the inner wall of the spline sleeve, and the groove is arranged on the spline shaft, and the spline sleeve is arranged
  • the grooves and the grooves on the spline shaft are superposed on each other to form a raceway, and a returning raceway is provided on a surface of the two returning devices opposite to the spline sleeve, the returning hole, the raceway and the returning roller
  • the roads are connected and the steel balls are placed in the return holes, raceways and return raceways.
  • the groove of the spline sleeve needs to meet the conditions such as smooth rolling of the ball, the processing precision of the groove is high, and the processing technology is complicated, and the longer the length of the groove, the more difficult it is to process and the longer it takes.
  • the processing precision of the groove is high, and the processing technology is complicated, and the longer the length of the groove, the more difficult it is to process and the longer it takes.
  • the diameter of the spline sleeve generally needs to be matched with the external equipment, and cannot be adjusted.
  • the length to diameter ratio of the spline sleeve can only be increased by lengthening the length of the spline sleeve, but the raceway needs to be returned to the opposite side.
  • the mate can form a loop of the ball. Therefore, the length of the groove needs to be equal to the length of the spline sleeve.
  • the length of the groove of the spline sleeve needs to be lengthened accordingly, thereby correspondingly Increased the difficulty of processing.
  • the processing difficulty and the manufacturing cost limit the maximum processing length of the spline sleeve suitable for mass production, so that the maximum length to diameter ratio of the spline sleeve suitable for mass production is small, and the industrial demand cannot be satisfied.
  • a ball spline pair comprising a spline sleeve and a spline shaft; wherein the spline sleeve is formed with an inserting cavity through which the spline shaft is inserted, and the retainer sleeve is installed in the front and rear ends of the spline sleeve
  • Two retainer sleeves are respectively disposed on two sides of the insertion cavity; at least two annular rails are arranged on the circumference of the retainer sleeve, and the inner wall of the spline sleeve is formed with a plurality of walking corresponding to each circular orbit a plurality of rolling bodies arranged along the extending path of the circular track and capable of rolling along the extending track;
  • the circular track comprises a load guiding channel, and the corresponding ball bearing position is sandwiched between the circular track and the corresponding ball bearing position;
  • An extension trajectory of the load guide is parallel to the axis of the spline sleeve;
  • the circular orbital track further includes a first transition guideway, a first return bead approach channel, a main approach channel, a second bead guide channel, and a second transition approach channel;
  • the load approach channel is located at the first transition approach channel And the second transition approach;
  • the bead position includes a first truncated stop face opposite the first transition approach, a first cylindrical limit face opposite the first bead approach, and a main lead a main raceway opposite the track, a second cylindrical limit face opposite the second ball turn path, a second turn limit face opposite the second transition guide, and a guide race opposite the load guide.
  • the first circular table limiting face is connected with the first cylindrical limiting face
  • second The circular table limiting face is connected with the second cylindrical limiting face
  • the main raceway is located between the first cylindrical limiting face and the second cylindrical limiting face
  • the guiding raceway is located at the first circular table limiting face and the second round table Limit between the faces.
  • the spline sleeve includes a spline nut, and both ends of the spline nut are mounted with an end cap, the inner end of the end cap is inserted into the spline nut; the first cylindrical limiting face is formed on the inner end of the end cap And the first round table limit face, the main raceway, the second cylindrical limit face, the second round table limit face, and the guide track are all formed on the spline mother.
  • the distance between the first transition channel and the inner wall of the cage sleeve is gradually increased; from the end close to the load channel to the second time At the other end of the bead channel, the distance between the second transition channel and the inner wall of the cage sleeve is gradually increased.
  • a mounting cavity for inserting the retainer sleeve is formed in the end of the spline sleeve, the mounting cavity includes a main cylindrical cavity extending axially along the spline sleeve; both ends of the main cylindrical cavity are connected to the limited position through the truncated cone cavity a cylindrical cavity; the main cylindrical cavity, the circular cavity, and the limiting cylindrical cavity are coaxially arranged; the small end of the two circular cavity is connected with the main cylindrical cavity, and the inner diameter of the small end of the circular cavity is equal to the inner diameter of the main cylindrical cavity, The inner diameter of the large end of the circular cavity is equal to the inner diameter of the cylindrical cavity; the first cylindrical limiting surface and the second cylindrical limiting surface located in the same ball position are respectively formed in the two cylindrical cavities of the same mounting cavity. On the cylindrical surface, the first circular table limiting surface and the second circular table limiting surface located in the same ball position are respectively formed on the circular table surfaces of the two circular table cavities of the same mounting cavity.
  • the ball bearing position is formed only on the inner wall of the mounting cavity; the guiding raceway is formed on the inner wall of the main cylindrical cavity, and both ends of the guiding raceway extend outward and extend to the inner edge of the corresponding circular table cavity a main table is formed on the inner wall of the main cylindrical cavity, and both ends of the main race extend outwardly and extend to the inner edge of the corresponding cylindrical cavity Or the corresponding cylindrical surface of the cylindrical cavity.
  • the outer wall of the spline sleeve is formed with a plurality of beading holes corresponding to the respective bead positions, the beading The hole runs radially through the corresponding ball position, and the plug hole is installed with a plug.
  • the bead hole is opposite to the main approach channel.
  • the rolling elements are steel balls or rollers.
  • the cage sleeve is installed in the end portion of the spline sleeve, and the rolling element is cyclically rolled by using the annular rail of the cage sleeve and the ball position in the spline sleeve, and in the production process, if the flower is lengthened
  • the length of the key sleeve can be lengthened by correspondingly lengthening the length of the insertion cavity, and the bead position needs to be slightly lengthened or even lengthened, so that the processing difficulty and the production of the present invention are compared with the existing ball spline pair.
  • the cost can be greatly reduced, and the maximum processing length of the spline sleeve suitable for mass production can be increased, thereby increasing the maximum length to diameter ratio of the spline sleeve suitable for mass production; and, the annular rail is integrally formed on the cage sleeve, The smoothness of the rolling of the balls is improved, and the friction is reduced; the structure of the invention is simple, the assembly is convenient, and the promotion is facilitated.
  • Figure 1 is a half cross-sectional view of the present invention, wherein the arrow indicates the direction of the bending moment;
  • Figure 2 is a half-sectional perspective view of the spline sleeve of the present invention;
  • Figure 3 is a schematic view showing the structure of a spline nut in the present invention.
  • Figure 4 is a schematic structural view of a retainer sleeve in the present invention.
  • Figure 5 is a cross-sectional view of the spline shaft of the present invention.
  • the structure diagram of a ball spline pair of the present invention includes a spline sleeve 2 and a spline shaft 1;
  • the spline sleeve 2 is formed with a spline shaft 1 inserted into the insertion cavity 29, the front and rear ends of the spline sleeve 2 are respectively mounted with a retainer sleeve 5, the two retainer sleeves 5 are placed on both sides of the insertion cavity 29;
  • the cage cover 5 Arranging at least two annular tracks on the upper circumference, the inner wall of the spline sleeve 2 is formed with a plurality of ball-points corresponding to the respective circular tracks, the ball-points are opposite to the corresponding ring-shaped tracks, and the Between the annular track and the corresponding ball position, a plurality of rolling bodies 4 are arranged along the extending path of the circular track and can roll along the extending track; the circular track includes a load guide 51, and the load
  • the annular tracks on the two cage sleeves 5 are corresponding in the circumferential direction so that the two load guides 51 on the two cage sleeves 5 correspond to each other.
  • the same load raceway 11 of the spline shaft 1 can be commonly associated (that is, the rolling bodies 4 of the two load guides 51 are all extended to the same load raceway 11) to effectively reduce the load on the spline shaft 1.
  • each of the cage sleeves 5 is provided with two annular tracks, and the spline shaft 1 is provided with two load races 11 , and the corresponding two load guides 51 on the two cage sleeves 5 are common. Corresponding to a load roll Road 11, to reduce the cost of labor.
  • the rolling bodies 4 in the load channel 51 project into the corresponding load races 11, the rolling bodies 4 can be rolled in the load.
  • the belt action of the track 11 is rolled down along the extended trajectory of the circular track. Due to the cooperation of the rolling bodies 4 in the load approach 51 and the load race 11, the spline shaft 1 can be restricted from rotating relative to the spline sleeve 2, so that the spline sleeve 2 can be oriented to the spline shaft 1 (or the spline shaft) 1 can transmit a certain rotational torque to the spline sleeve 2).
  • the retainer sleeve 5 is mounted in the end portion of the spline sleeve 2, and the rolling track 4 is cyclically rolled by the annular rail of the retainer sleeve 5 and the ball bearing position in the spline sleeve 2, so that the present invention passes Reasonably adjusting the circulation loop structure of the rolling element 4 can reduce the influence of the lengthening of the spline sleeve 2 on the ball-feeding position and the circular orbit, and in the production process, if the length of the spline sleeve 2 is lengthened, the length can be lengthened by correspondingly The length of the cavity 29 is only slightly lengthened, even without lengthening, and since the insertion cavity 29 only needs to pass through the spline shaft 1, the processing requirements and the processing process are relatively simple, and therefore, with the existing Compared with the ball spline pair, the processing difficulty and the manufacturing cost of the invention can be greatly reduced, and the maximum processing length of the spline
  • the rolling resistance of the rolling body 4 can be reduced, and the rolling of the rolling body 4 can be improved, and at the same time, the retaining sleeve 5 can be held.
  • the structure is not complicated, and can be realized by various processing methods such as milling or injection molding, and the processing cost is low; in addition, the bending rigidity of the spline shaft 1 can be greatly improved, and the movement is more flexible.
  • the circular orbit includes a first transition channel 55, a first ball return channel 53, a main approach channel 52, a second ball return channel 54, and a second transition.
  • the approach path 56 is located between the first transition guide 55 and the second transition guide 56;
  • the ball position includes a first truncated stop face 23 opposite to the first transition guide 55 a first cylindrical limiting surface portion 24 opposite to the first ball return path 53 , a main raceway 25 opposite to the main approach channel 52 , and a second cylindrical limiting surface opposite to the second ball return channel 54
  • the portion 26 has a second truncated portion 27 opposite to the second transition channel 56 and a guide race 28 opposed to the load channel 51.
  • the first cylindrical limiting surface portion 24 and the second cylindrical limiting surface portion 26 are all cylindrical surfaces
  • the first circular table limiting surface portion 23 and the second circular table limiting surface portion 27 are all rounded surfaces.
  • the present invention can avoid the rolling element 4 from being detached from the circular orbit by utilizing the restriction of the rolling element 4 by the ball position, and the structure of the bead position can be appropriately set, and the circular track can be integrally formed.
  • the rolling body 4 can be made into a circular pure rolling along the extending path of the annular approach channel under the guiding action and restraint of the circular orbiting position, and the rolling is flexible and the friction is small.
  • only the cooperation of the spline sleeve 2 and the retainer sleeve 5 is required to form a loop structure for the rolling body 4 to circulate, the structure is relatively simple, and the working performance is reliable.
  • each bead position is the same, and a single bead position is further described in detail as follows: In the same bead position, the first truncated limit face 23 and the first cylindrical limit face 24 is connected, the second circular table limiting surface portion 27 is connected with the second cylindrical limiting surface portion 26; the main raceway 25 is located between the first cylindrical limiting surface portion 24 and the second cylindrical limiting surface portion 26, and the guiding raceway 28 is located at the A circular table limiting face 23 and a second circular table limiting face 27 are provided.
  • the first truncated limiting surface portion 23 and the first cylindrical limiting surface portion 24 may be integrally formed on the spline sleeve 2 to achieve the connection therebetween.
  • the spline sleeve 2 may also be With two separate parts, the first truncated limiting surface portion 23 and the first cylindrical limiting surface portion 24 can be separately formed on the two parts to achieve the connection by using the joining.
  • the second circular table limiting surface portion 27 and the second cylindrical limiting surface portion 26 can also be connected by integral molding or engagement.
  • the distance between the first transition channel 55 and the inner wall of the cage cover 5 is gradually increased from one end near the load channel 51 to the other end near the first ball return channel 53. So that the rolling element 4 can smoothly roll from the load guide 51 to the first ball return path 53 (or from the first ball return path 53 to the load approach path 51); from one end close to the load approach path 51 to near the first The other end of the second bead channel 54, the second The distance between the transition guide 56 and the inner wall of the retainer sleeve 5 is gradually increased to move the rolling body 4 from the load guide 51 to the second return bead 54 (or from the second return bead 54 to the load guide 51). ) Smooth scrolling. At this time, the structure of the first circular table limiting surface portion 23 and the second circular table limiting surface portion 27 is matched.
  • the extended trajectory of the main approach 52 is parallel to the axis of the spline sleeve 2.
  • the first ball return path 53, the main approach path 52, and the second return bead path 54 are all IHJ slots formed on the outer wall of the retainer sleeve 5, and the main raceway 25 and the guide raceway 28 are both A groove formed on the inner wall of the spline sleeve 2.
  • the rolling body 4 when the rolling body 4 rolls to the load guide 51, the rolling body 4 is in contact with the guide race 28; when the rolling body 4 rolls to the first transition guide 55, the rolling body 4 and the first round table The limiting face 23 is in contact; when the rolling body 4 rolls to the first ball returning path 53, the rolling body 4 is in contact with the first cylindrical limiting face 24; when the rolling body 4 rolls to the main approaching path 52, the rolling body 4 in contact with the main raceway 25; when the rolling body 4 rolls to the second ball return path 54, the rolling body 4 is in contact with the second cylindrical limit face portion 26; when the rolling body 4 rolls to the second transition guideway 56 At this time, the rolling elements 4 are in contact with the second turntable limit surface portion 27.
  • a mounting cavity for inserting the retainer sleeve 5 is formed in the end of the spline sleeve 2, the mounting cavity includes a main cylindrical cavity extending axially along the spline sleeve 2; both ends of the main cylindrical cavity pass through the truncated cone cavity Connecting a finite cylindrical cavity; the small end of the two circular cavity is connected with the main cylindrical cavity, and the inner diameter of the small end of the circular cavity is equal to the inner diameter of the main cylindrical cavity, and the inner diameter of the large end of the circular cavity is equal to the inner diameter of the limiting cylindrical cavity;
  • the first cylindrical limiting surface portion 24 and the second cylindrical limiting surface portion 26 located in the same ball position are respectively formed on the cylindrical surface of the two limiting cylindrical cavities of the same mounting cavity (that is, the first cylindrical limit position)
  • the face portion 24 is formed on a cylindrical surface of one of the limiting cylindrical cavities of the mounting cavity, and the second cylindrical limiting face portion 26 located in the same ball position as the first cylindrical limiting face portion 24
  • the first circular table limiting surface portion 23 and the second circular table limiting surface portion 27 located in the same ball position are respectively formed on the round table surfaces of the two circular table cavities of the same mounting cavity.
  • Upper that is, the first truncated limit face 23 Into the mounting cavity
  • the second truncated cone limiting surface portion 27 located in the same ball position as the first truncated cone limiting surface portion 23 is formed on the round table surface of the other circular table cavity of the mounting cavity
  • the first cylindrical limiting surface portion 24 located in each of the ball-receiving positions of the same mounting cavity is formed on a cylindrical surface of a limiting cylindrical cavity of the mounting cavity, and the second in each ball-shaped position of the same mounting cavity
  • the cylindrical limiting surface portion 26 is formed on the cylindrical surface of the other limiting cylindrical cavity of the mounting cavity, and the first circular table limiting surface portion 23 located in each ball bearing position of the same mounting cavity is formed in a circle of the mounting cavity.
  • the second circular table limiting surface portion 27 located in each of the ball-receiving positions of the same mounting cavity is formed on the circular table surface of the other circular table cavity of the mounting cavity, and therefore, regardless of the number of the bead positions More or less, as long as two circular table cavities and two limit cylindrical cavities are used in the installation cavity, the first cylindrical limit surface portion 24, the second cylindrical limit surface portion 26, and the first circular limit are satisfied.
  • the demand for the number of the face portion 23 and the second turntable limit face portion 27 can reduce the processing time and improve the processing efficiency.
  • the main cylindrical cavity, the circular cavity, and the limiting cylindrical cavity are coaxially arranged, the ball position is formed only on the inner wall of the mounting cavity;
  • the guiding race 28 is formed on the inner wall of the main cylindrical cavity, and the Both ends of the guiding race 28 extend outwardly and extend to the inner edge of the corresponding circular table cavity or the corresponding circular table surface of the circular table cavity;
  • the main race 25 is formed on the inner wall of the main cylindrical cavity, and the Both ends of the main raceway 25 extend outwardly and extend to the inner side edge of the corresponding limiting cylindrical cavity or the cylindrical surface of the corresponding limiting cylindrical cavity.
  • the retainer sleeve 5 has a cylindrical shape with both ends open, and the inner side wall of the mounting cavity and the dustproof cover 3 attached to the end of the spline sleeve 2 can be utilized. Positioning, specifically, the two ends of the retainer sleeve 5 abut against the inner side wall of the mounting cavity and the dust cover 3, respectively, thereby preventing the retainer sleeve 5 from moving axially.
  • the retainer cover 5 can be mounted on the spline sleeve 2 by other structures. For example, two cards can be used in the spline sleeve 2 The strip positions the retainer sleeve 5 on the spline sleeve 2.
  • the spline sleeve 2 includes a spline nut 22, and both ends of the spline nut 22 are mounted with an end cap 21, The inner end of the end cap 21 is inserted into the spline nut 22; the first cylindrical limiting surface portion 24 is formed on the inner end of the end cap 21, and the first truncated limiting surface portion 23, the main raceway 25, and the second cylinder
  • the limiting surface portion 26, the second circular table limiting surface portion 27, and the guiding raceway 28 are all formed on the spline nut 22, that is, one of the limiting cylindrical cavities of the mounting cavity is formed on the end cap 21, and the mounting cavity is The other cavities are formed on the spline nut 22.
  • one end of the main race 25 extends to the inner edge of the limit cylindrical cavity on the end cover 21 to facilitate the integral formation of the main race 25 on the spline nut 22.
  • the first circular table limiting surface portion 23 and the first cylindrical limiting surface portion 24 are connected by means of engagement, and the second circular table limiting surface portion 27 and the second cylindrical limiting surface portion 26 are realized by integral molding. The connection between the two.
  • the spline nut 22 is provided in a cylindrical shape with both ends open.
  • a mating cavity is formed on the spline nut 22, and an inner end of the end cap 21 is inserted into the mating cavity and fixed by an interference fit or a glue.
  • the rolling elements 4 may be made of steel balls, rollers or the like.
  • the assembly process of the present invention is as follows:
  • the rolling body 4 is filled into the annular track of the retainer sleeve 5 at the mating cavity end of the spline nut 22; d. Finally, the end cap 21 is mounted on the spline nut 22.
  • the structure of the second embodiment of the ball spline pair of the present invention differs from that of Fig. 1 only in the structure of the spline sleeve 2.
  • the spline sleeve 2 is integrally formed, and the outer wall of the spline sleeve 2 is formed with a plurality of beading holes corresponding to the respective bead positions, and the beading holes are radially penetrated correspondingly.
  • the bead position is installed, and the plug hole is installed in the bead hole.
  • the beading hole can radially penetrate any part of the corresponding ball position, That is, the beading hole can be opposed to any section of the circular orbit.
  • the cage sleeve 5 can be directly positioned and installed in the spline sleeve 2, and then the rolling body 4 is filled into the annular rail through the beading hole. After the filling of the rolling body 4 is completed, the bead hole is filled by the plug.
  • the sealing can also facilitate the installation of the rolling elements 4 and improve the installation efficiency of the rolling elements 4.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

一种滚珠花键副，包括花键套（2）、花键轴（1）；该花键套（2）的前后两端内均安装有保持架套（5）；所述保持架套（5）上圆周排列有至少两个环形轨道，所述花键套（2）的内壁上形成有走珠位，所述环形轨道与对应的走珠位之间夹装有多个滚动体（4）；所述环形轨道包括负载引道（51）；该负载引道（51）上形成有开口；所述花键轴（1）可轴向移动地穿插在该两保持架套（5）内，且该花键轴（1）的外壁上圆周排列有沿花键套（2）轴向延伸的负载滚道（11），各负载引道（51）内的滚动体（4）通过开口伸出至对应的负载滚道（11）上。与现有的滚珠花键副相比，该滚珠花键副的加工难度和制作成本能够大大降低，可增大花键套适于批量生产的最大加工长度，从而增大花键套适于批量生产的最大长度直径比。

Description

一种滚珠花键畐''
技术领域
本发明涉及一种滚珠花键副。
背景技术
在机械领域内， 滚珠花键副常用于自动化设备和其他具有高灵敏度高可靠 性的直线运动并传递扭矩的系统中。
授权公告号为 CN2856565Y公开了一种端盖式返向滚动花键副， 由花键轴、 花键套和钢球组成， 花键套设在花键轴上， 在花键轴上且位于花键套的两侧分 别套设有返向器， 在花键套上设有回程孔， 在花键套的内壁上设有沟槽， 在花 键轴上设有沟槽， 花键套上的沟槽和花键轴上的沟槽相互叠合组成滚道， 在两 个返向器的与花键套相对的表面上设有返向滚道， 所述回程孔、 滚道和返向滚 道相通， 并且钢球被置于回程孔、 滚道和返向滚道中。 而由于花键套的沟槽需 要满足滚珠顺畅滚动等条件， 因而， 沟槽的加工精度较高， 加工工艺较复杂， 而沟槽的长度越长， 其加工难度越大， 耗费时间越长。 在滚动花键副的实际生 产过程中， 为了增大整个滚动花键副可提供的弯曲力矩， 常需要依据实际使用 情况增大花键套的长度直径比。 而花键套的直径一般需要与外界设备配合， 不 能进行调整， 只能通过加长花键套的长度来增大花键套的长度直径比， 但由于 滚道需与位于两侧的返向滚道配合才能形成滚珠的循环回路， 因而， 沟槽的长 度需与花键套的长度相等， 在加长花键套的长度时， 也需要相应地加长花键套 的沟槽的长度， 从而相应地增大了其加工难度。 而且， 随着花键套的长度的加 长， 滚珠的数量也需要相应地增多， 装配时间也相应地增长， 导致制作成本也 大幅度升高。 因此， 其加工难度和制作成本， 限制了该花键套适于批量生产的 最大加工长度， 从而造成花键套适于批量生产的最大长度直径比值较小， 无法 满足工业需求。
发明内容
为了克服现有技术的不足， 本发明的目的在于提供一种滚珠花键副， 其与 现有的滚珠花键副相比， 可增大花键套适于批量生产的最大加工长度。
为解决上述问题， 本发明所釆用的技术方案如下：
一种滚珠花键副， 包括花键套、 花键轴； 所述花键套内形成有供花键轴穿 插的插装腔， 该花键套的前后两端内均安装有保持架套， 该两保持架套分置于 插装腔的两侧； 所述保持架套上圓周排列有至少两个环形轨道， 所述花键套的 内壁上形成有与各环形轨道——对应的若干个走珠位， 所述环形轨道与对应的 走珠位之间夹装有沿该环形轨道延伸轨迹依次排列并可沿着该延伸轨迹滚动的 多个滚动体； 所述环形轨道包括负载引道， 所述负载引道的延伸轨迹与花键套 的轴线平行； 该负载引道上形成有贯穿保持架套内壁的开口； 所述花键轴可轴 向移动地穿插在该两保持架套内， 且该花键轴的外壁上圓周排列有沿花键套轴 向延伸的负载滚道， 各负载引道内的滚动体通过开口伸出至对应的负载滚道上。
所述环形轨道还包括依次连接的第一过渡引道， 第一回珠引道、 主引道、 第二回珠引道、 第二过渡引道； 所述负载引道位于第一过渡引道和第二过渡引 道之间； 所述走珠位包括与第一过渡引道相对的第一圓台限位面部、 与第一回 珠引道相对的第一圓柱限位面部、 与主引道相对的主滚道、 与第二回珠引道相 对的第二圓柱限位面部、 与第二过渡引道相对的第二圓台限位面部、 与负载引 道相对的导向滚道。
在同一走珠位内， 所述第一圓台限位面部与第一圓柱限位面部连接， 第二 圓台限位面部与第二圓柱限位面部连接； 主滚道位于第一圓柱限位面部与第二 圓柱限位面部之间， 导向滚道位于第一圓台限位面部与第二圓台限位面部之间。
所述花键套包括花键母， 花键母的两端均安装有端盖， 所述端盖的内侧端 插装在花键母内； 第一圓柱限位面部形成在端盖内侧端上， 而第一圓台限位面 部、 主滚道、 第二圓柱限位面部、 第二圓台限位面部、 导向滚道均形成在花键 母上。
从靠近负载引道的一端至靠近第一回珠引道的另一端， 所述第一过渡引道 与保持架套的内壁的距离逐渐增大； 从靠近负载引道的一端至靠近第二回珠引 道的另一端， 所述第二过渡引道与保持架套的内壁的距离逐渐增大。
花键套的端部内形成有供保持架套穿插的安装腔， 所述安装腔包括沿花键 套轴向延伸的主圓柱腔； 所述主圓柱腔的两端均通过圓台腔连接有限位圓柱腔； 所述主圓柱腔、 圓台腔、 限位圓柱腔共轴设置； 该两圓台腔的小端与主圓柱腔 连接， 且圓台腔小端的内径与主圓柱腔的内径相等， 圓台腔大端的内径与限位 圓柱腔的内径相等； 位于同一走珠位内的第一圓柱限位面部、 第二圓柱限位面 部分别对应地形成在同一安装腔的两限位圓柱腔的圓柱面上， 位于同一走珠位 内的第一圓台限位面部、 第二圓台限位面部分别对应地形成在同一安装腔的两 圓台腔的圓台面上。
所述走珠位仅形成在安装腔的内壁上； 导向滚道成型在主圓柱腔的内壁上， 且该导向滚道的两端均朝外延伸， 并延伸至对应的圓台腔的内侧边缘处或对应 的圓台腔的圓台面上； 主滚道成型在主圓柱腔的内壁上， 且该主滚道的两端均 朝外延伸， 并延伸至对应的限位圓柱腔的内侧边缘处或对应的限位圓柱腔的圓 柱面上。
所述花键套的外壁上形成有与各走珠位一一对应的若干个填珠孔， 该填珠 孔径向贯穿对应的走珠位， 所述填珠孔内安装有堵头。
所述填珠孔与主引道相对。
所述滚动体为钢珠， 或者滚柱。
相比现有技术， 本发明的有益效果在于：
本发明通过在花键套的端部内安装有保持架套， 并通过利用保持架套的环 形轨道和花键套内的走珠位配合， 供滚动体循环滚动， 而在生产过程中， 若加 长花键套的长度， 可通过相应地加长插装腔的长度， 而对走珠位只需稍微加长， 甚至无需加长， 因此， 与现有的滚珠花键副相比， 本发明的加工难度和制作成 本能够大大降低， 可增大花键套适于批量生产的最大加工长度， 从而增大花键 套适于批量生产的最大长度直径比； 而且， 将环形轨道一体成型在保持架套上， 能提高滚珠滚动的顺畅性， 减小摩擦； 本发明的结构简单， 装配方便， 有利于 推广。
附图说明
图 1为本发明的半剖示意图， 其中， 箭头示意出弯曲力矩的方向； 图 2为本发明中的花键套的半剖立体图；
图 3为本发明中的花键母的结构示意图；
图 4为本发明中的保持架套的结构示意图；
图 5为本发明中的花键轴的剖视图；
其中， 1、 花键轴； 11、 负载滚道； 2、 花键套； 21、 端盖； 11、 花键母； 23、 第一圓台限位面部； 24、 第一圓柱限位面部； 25、 主滚道； 26、 第二圓柱 限位面部； 27、 第二圓台限位面部； 28、 导向滚道； 29、 插装腔； 3、 防尘盖； 4、 滚动体； 5、 保持架套； 51、 负载引道； 52、 主引道； 53、 第一回珠引道； 54、 第二回珠引道； 55、 第一过渡引道； 56、 第二过渡引道。
具体实施方式
下面， 结合附图以及具体实施方式， 对本发明做进一步描述， 以便于更清 楚的理解本发明所要求保护的技术思路。
实施例一
如图 1、 2、 3、 4、 5所示， 为本发明一种滚珠花键副的结构示意图， 包括花 键套 2、 花键轴 1 ; 所述花键套 2内形成有供花键轴 1穿插的插装腔 29 , 该花键套 2 的前后两端内均安装有保持架套 5 , 该两保持架套 5分置于插装腔 2 9的两侧； 所 述保持架套 5上圓周排列有至少两个环形轨道， 所述花键套 2的内壁上形成有与 各环形轨道——对应的若干个走珠位， 所述走珠位与对应的环形轨道相对， 且 所述环形轨道与对应的走珠位之间夹装有沿该环形轨道延伸轨迹依次排列并可 沿着该延伸轨迹滚动的多个滚动体 4 ; 所述环形轨道包括负载引道 51 , 所述负载 引道 51的延伸轨迹与花键套 2的轴线平行； 该负载引道 51上形成有贯穿保持架套 5内壁的开口； 其中， 该开口可从负载引道 51的一端延伸至另一端， 也可只设置 在负载引道 51的中部或其他位置； 所述花键轴 1可轴向移动地穿插在该两保持架 套 5内， 且该花键轴 1的外壁上圓周排列有沿花键套 2轴向延伸的负载滚道 11 , 各 负载引道 51内的滚动体 4通过开口伸出至对应的负载滚道 1 1上。
其中， 为了减少加工时间， 有效控制加工成本， 该两个保持架套 5上的各环 形轨道在圓周方向上——对应， 以使得两个保持架套 5上相对应的两个负载引道 51可共同对应于花键轴 1的同一负载滚道 11 (也就是， 该两负载引道 51的滚动体 4均伸出至同一负载滚道 11上） ， 以有效减少花键轴 1上的负载滚道 11的加工数 量。 优选的， 每个保持架套 5上均设置有两个环形轨道， 而花键轴 1上设置有两 个负载滚道 11 , 而两个保持架套 5上对应的两个负载引道 51共同对应于一负载滚 道 11 , 以减少力 p工成本。
在使用时， 当花键轴 1相对于花键套 2做轴向运动时， 由于负载引道 51内的 滚动体 4伸出至对应的负载滚道 11内， 该滚动体 4可在负载滚道 11的带动作用下 沿环形轨道的延伸轨迹滚动。 而由于负载引道 51内的滚动体 4与负载滚道 11的配 合作用， 可限制花键轴 1相对花键套 2转动， 因此， 花键套 2可向花键轴 1 (或者 花键轴 1可向花键套 2 )传递一定的旋转力矩。
本发明通过在花键套 2端部内安装有保持架套 5 , 并利用保持架套 5的环形轨 道和花键套 2内的走珠位配合， 供滚动体 4循环滚动， 因此， 本发明通过合理调 节滚动体 4的循环回路结构， 可减少花键套 2的加长对走珠位、 环形轨道造成的 影响， 而在生产过程中， 若加长花键套 2的长度， 可通过相应地加长插装腔 29的 长度， 而对走珠位只需稍微加长， 甚至无需加长， 而由于插装腔 29只需供花键 轴 1穿过， 其加工要求和加工工艺比较简单， 因此， 与现有的滚珠花键副相比， 本发明的加工难度和制作成本能够大大降低， 可增大花键套 2适于批量生产的最 大加工长度， 从而增大花键套 2适于批量生产的最大长度直径比； 而且， 通过将 环形轨道一体集成在保持架套 5上， 可减少滚动体 4滚动阻力， 提高滚动体 4滚动 的顺畅性， 同时， 保持架套 5的结构并不复杂， 可以通过铣或注塑等多种加工方 式实现， 加工成本较低； 此外， 花键轴 1的弯曲刚度也可以得到较大的提高， 运 动更加灵活。
优选的， 如图 2、 4所示， 所述环形轨道包括依次连接的第一过渡引道 55 , 第一回珠引道 53、 主引道 52、 第二回珠引道 54、 第二过渡引道 56; 所述负载引 道 51位于第一过渡引道 55和第二过渡引道 56之间； 所述走珠位包括与第一过渡 引道 55相对的第一圓台限位面部 23、 与第一回珠引道 53相对的第一圓柱限位面 部 24、 与主引道 52相对的主滚道 25、 与第二回珠引道 54相对的第二圓柱限位面 部 26、 与第二过渡引道 56相对的第二圓台限位面部 27、 与负载引道 51相对的导 向滚道 28。 而顾名思义， 第一圓柱限位面部 24、 第二圓柱限位面部 26均为圓柱 面， 第一圓台限位面部 23、 第二圓台限位面部 27均为圓台面。 当滚动体 4在环形 轨道上滚动时， 本发明通过利用走珠位对滚动体 4的限制， 可避免滚动体 4脱离 环形轨道， 而通过合理设置走珠位的结构， 以及将环形轨道一体成型在保持架 套 5上， 可使滚动体 4在环形轨道和走珠位的导向作用和约束作用下， 沿着环形 引道的延伸轨迹做循环纯滚动， 滚动灵活， 且摩擦较小。 而且， 只需要花键套 2 和保持架套 5的配合， 即可构成供滚动体 4循环滚动的回路结构， 结构比较简单， 且工作性能可靠。
其中， 每个走珠位的结构均相同， 现对单个走珠位做进一步详细介绍， 具 体如下： 在同一走珠位内， 所述第一圓台限位面部 23与第一圓柱限位面部 24连 接， 第二圓台限位面部 27与第二圓柱限位面部 26连接； 主滚道 25位于第一圓柱 限位面部 24与第二圓柱限位面部 26之间， 导向滚道 28位于第一圓台限位面部 23 与第二圓台限位面部 27之间。 其中， 所述第一圓台限位面部 23与第一圓柱限位 面部 24可一体成型在花键套 2上， 以此来实现两者的连接； 当然， 所述花键套 2 还可以釆用两个分体的零件， 所述第一圓台限位面部 23、 第一圓柱限位面部 24 可分别成型在两个零件上， 以通过利用衔接的方式来实现两者的连接。 而与此 相类似的， 所述第二圓台限位面部 27、 第二圓柱限位面部 26也可以通过一体成 型或衔接等方式来实现两者之间的连接。
具体的， 如图 1所示， 从靠近负载引道 51的一端至靠近第一回珠引道 53的另 一端， 所述第一过渡引道 55与保持架套 5的内壁的距离逐渐增大， 以使滚动体 4 从负载引道 51至第一回珠引道 53 (或从第一回珠引道 53至负载引道 51 ) 能够顺 畅滚动； 从靠近负载引道 51的一端至靠近第二回珠引道 54的另一端， 所述第二 过渡引道 56与保持架套 5的内壁的距离逐渐增大， 以使滚动体 4从负载引道 51至 第二回珠引道 54 (或从第二回珠引道 54至负载引道 51 )能够顺畅滚动。 而此时， 第一圓台限位面部 23与第二圓台限位面部 27的结构则与之相配合。
具体的，主引道 52的延伸轨迹与花键套 2的轴线平行。所述第一回珠引道 53、 主引道 52、 第二回珠引道 54均为形成在保持架套 5的外壁上的 IHJ槽， 所述主滚道 25、 导向滚道 28均为形成在花键套 2的内壁上的凹槽。 通过釆用上述结构， 可方 便于加工， 并确保其性能。
在使用时， 当滚动体 4滚动至负载引道 51时， 该滚动体 4与导向滚道 28相接 触； 当滚动体 4滚动至第一过渡引道 55时， 滚动体 4与第一圓台限位面部 23相接 触； 当滚动体 4滚动至第一回珠引道 53时， 滚动体 4与第一圓柱限位面部 24相接 触； 当滚动体 4滚动至主引道 52时， 滚动体 4与主滚道 25相接触； 当滚动体 4滚动 至第二回珠引道 54时， 滚动体 4与第二圓柱限位面部 26相接触； 当滚动体 4滚动 至第二过渡引道 56时， 滚动体 4与第二圓台限位面部 27相接触。
花键套 2的端部内形成有供保持架套 5穿插的安装腔， 所述安装腔包括沿花 键套 2轴向延伸的主圓柱腔； 所述主圓柱腔的两端均通过圓台腔连接有限位圓柱 腔； 该两圓台腔的小端与主圓柱腔连接， 且圓台腔小端的内径与主圓柱腔的内 径相等， 圓台腔大端的内径与限位圓柱腔的内径相等； 位于同一走珠位内的第 一圓柱限位面部 24、 第二圓柱限位面部 26分别对应地形成在同一安装腔的两限 位圓柱腔的圓柱面上（也就是说， 第一圓柱限位面部 24形成在安装腔的其中一 限位圓柱腔的圓柱面上， 则与该第一圓柱限位面部 24位于同一走珠位内的第二 圓柱限位面部 26形成在该安装腔的另一限位圓柱腔的圓柱面上） ， 位于同一走 珠位内的第一圓台限位面部 23、 第二圓台限位面部 27分别对应地形成在同一安 装腔的两圓台腔的圓台面上（也就是说， 第一圓台限位面部 23形成在安装腔的 其中一圓台腔的圓台面上， 则与该第一圓台限位面部 23位于同一走珠位内的第 二圓台限位面部 27形成在该安装腔的另一圓台腔的圓台面上） 。 由于位于同一 安装腔的各走珠位内的第一圓柱限位面部 24均形成在该安装腔的一限位圓柱腔 的圓柱面上， 而位于同一安装腔的各走珠位内的第二圓柱限位面部 26均形成在 该安装腔的另一限位圓柱腔的圓柱面上， 位于同一安装腔的各走珠位内的第一 圓台限位面部 23均形成在该安装腔的一圓台腔的圓台面上， 位于同一安装腔的 各走珠位内的第二圓台限位面部 27均形成在该安装腔的另一圓台腔的圓台面 上， 因此， 无论走珠位的数量设置为多或少， 只要在安装腔内釆用两个圓台腔 和两个限位圓柱腔， 便可满足第一圓柱限位面部 24、 第二圓柱限位面部 26、 第 一圓台限位面部 23、 第二圓台限位面部 27的数量的需求， 能够减少加工时间， 提高加工效率。
优选的， 所述主圓柱腔、 圓台腔、 限位圓柱腔共轴设置， 所述走珠位仅形 成在安装腔的内壁上； 导向滚道 28成型在主圓柱腔的内壁上， 且该导向滚道 28 的两端均朝外延伸， 并延伸至对应的圓台腔的内侧边缘处或对应的圓台腔的圓 台面上； 主滚道 25成型在主圓柱腔的内壁上， 且该主滚道 25的两端均朝外延 伸， 并延伸至对应的限位圓柱腔的内侧边缘处或对应的限位圓柱腔的圓柱面上。
其中， 如图 1、 4所示， 所述保持架套 5呈两端开口的圓筒状， 其可利用安装 腔的内侧壁、 以及卡装在花键套 2端部上的防尘盖 3进行定位， 具体的， 保持架 套 5的两端分别抵靠在安装腔的内侧壁和防尘盖 3上， 从而防止保持架套 5轴向移 动。 当然， 除了利用防尘盖 3和安装腔的内侧壁外， 还可以利用其他结构将保持 架套 5安装在花键套 2上， 例如， 还可以利用两卡装在花键套 2内的卡条将保持架 套 5定位在花键套 2上。
优选的， 所述花键套 2包括花键母 22 , 花键母 22的两端均安装有端盖 21 , 所 述端盖 21的内侧端插装在花键母 22内； 第一圓柱限位面部 24形成在端盖 21内侧 端上， 而第一圓台限位面部 23、 主滚道 25、 第二圓柱限位面部 26、 第二圓台限 位面部 27、 导向滚道 28均形成在花键母 22上， 也就是， 安装腔的其中一限位圓 柱腔成型在端盖 21上， 而安装腔内的其他腔则成型在花键母 22上。 通过釆用花 键母 22和端盖 21的结合设计， 可方便于滚动体 4的装配， 提高滚动体 4的装配效 率。 而此时， 主滚道 25的一端延伸至位于端盖 21上的限位圓柱腔的内侧边缘处， 以方便于主滚道 25在花键母 22上一体成型。 第一圓台限位面部 23、 第一圓柱限 位面部 24釆用衔接的方式来实现两者的连接， 第二圓台限位面部 27、 第二圓柱 限位面部 26通过一体成型方式来实现两者之间的连接。
具体的， 所述花键母 22设置为两端开口的圓筒状。 所述花键母 22上还成型 有配合腔， 所述端盖 21的内侧端插装在配合腔内， 并通过过盈配合的方式或胶 粘的方式固定。
所述滚动体 4可釆用钢珠、 滚柱等。
本发明的装配过程如下：
a.在端盖 21内安装防尘盖 3;
b.将保持架套 5装入花键母 22内；
c在花键母 22的配合腔端向保持架套 5的环形轨道内填充滚动体 4； d.最后将端盖 21安装在花键母 22上。
实施例二
本发明的滚珠花键副的第二种实施方式的结构与图 1的区别仅在于： 花键套 2的结构。 在实施例二中， 所述花键套 2—体成型， 所述花键套 2的外壁上形成有 与各走珠位——对应的若干个填珠孔， 该填珠孔径向贯穿对应的走珠位， 该填 珠孔内安装有堵头。 其中， 该填珠孔可径向贯穿对应的走珠位的任一部位， 也 就是， 该填珠孔可与环形轨道的任一路段相对。 优选的， 所述填珠孔与主引道
52相对。 在装配时， 可先将保持架套 5直接定位安装在花键套 2内， 然后通过填 珠孔往环形轨道内填充滚动体 4 , 待滚动体 4填充完成后， 利用堵头将填珠孔封 堵， 同样可便于滚动体 4的安装， 提高滚动体 4的安装效率。
上述实施方式仅为本发明的优选实施方式， 不能以此来限定本发明保护的 范围， 本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换 均属于本发明所要求保护的范围。

Claims

权 利 要 求 书
1.一种滚珠花键副， 包括花键套、 花键轴； 其特征在于： 所述花键套内形 成有供花键轴穿插的插装腔， 该花键套的前后两端内均安装有保持架套， 该两 保持架套分置于插装腔的两侧； 所述保持架套上圓周排列有至少两个环形轨道， 所述花键套的内壁上形成有与各环形轨道——对应的若干个走珠位， 所述环形 轨道与对应的走珠位之间夹装有沿该环形轨道延伸轨迹依次排列并可沿着该延 伸轨迹滚动的多个滚动体； 所述环形轨道包括负载引道， 所述负载引道的延伸 轨迹与花键套的轴线平行； 该负载引道上形成有贯穿保持架套内壁的开口； 所 述花键轴可轴向移动地穿插在该两保持架套内， 且该花键轴的外壁上圓周排列 有沿花键套轴向延伸的负载滚道， 各负载引道内的滚动体通过开口伸出至对应 的负载滚道上。
2.如权利要求 1 所述的滚珠花键副， 其特征在于： 所述环形轨道还包括依 次连接的第一过渡引道， 第一回珠引道、 主引道、 第二回珠引道、 第二过渡引 道； 所述负载引道位于第一过渡引道和第二过渡引道之间； 所述走珠位包括与 第一过渡引道相对的第一圓台限位面部、 与第一回珠引道相对的第一圓柱限位 面部、 与主引道相对的主滚道、 与第二回珠引道相对的第二圓柱限位面部、 与 第二过渡引道相对的第二圓台限位面部、 与负载引道相对的导向滚道。
3.如权利要求 2 所述的滚珠花键副， 其特征在于： 在同一走珠位内， 所述 第一圓台限位面部与第一圓柱限位面部连接， 第二圓台限位面部与第二圓柱限 位面部连接； 主滚道位于第一圓柱限位面部与第二圓柱限位面部之间， 导向滚 道位于第一圓台限位面部与第二圓台限位面部之间。
4.如权利要求 2所述的滚珠花键副， 其特征在于： 所述花键套包括花键母， 花键母的两端均安装有端盖， 所述端盖的内侧端插装在花键母内； 第一圓柱限 位面部形成在端盖内侧端上， 而第一圓台限位面部、 主滚道、 第二圓柱限位面 部、 第二圓台限位面部、 导向滚道均形成在花键母上。
5.如权利要求 1 所述的滚珠花键副， 其特征在于： 从靠近负载引道的一端 至靠近第一回珠引道的另一端， 所述第一过渡引道与保持架套的内壁的距离逐 渐增大； 从靠近负载引道的一端至靠近第二回珠引道的另一端， 所述第二过渡 弓 I道与保持架套的内壁的距离逐渐增大。
6.如权利要求 2 所述的滚珠花键副， 其特征在于： 花键套的端部内形成有 供保持架套穿插的安装腔， 所述安装腔包括沿花键套轴向延伸的主圓柱腔； 所 述主圓柱腔的两端均通过圓台腔连接有限位圓柱腔； 所述主圓柱腔、 圓台腔、 限位圓柱腔共轴设置； 该两圓台腔的小端与主圓柱腔连接， 且圓台腔小端的内 径与主圓柱腔的内径相等， 圓台腔大端的内径与限位圓柱腔的内径相等； 位于 同一走珠位内的第一圓柱限位面部、 第二圓柱限位面部分别对应地形成在同一 安装腔的两限位圓柱腔的圓柱面上， 位于同一走珠位内的第一圓台限位面部、 第二圓台限位面部分别对应地形成在同一安装腔的两圓台腔的圓台面上。
7.如权利要求 6 所述的滚珠花键副， 其特征在于： 所述走珠位仅形成在安 装腔的内壁上； 导向滚道成型在主圓柱腔的内壁上， 且该导向滚道的两端均朝 外延伸， 并延伸至对应的圓台腔的内侧边缘处或对应的圓台腔的圓台面上； 主 滚道成型在主圓柱腔的内壁上， 且该主滚道的两端均朝外延伸， 并延伸至对应 的限位圓柱腔的内侧边缘处或对应的限位圓柱腔的圓柱面上。
8.如权利要求 2 所述的滚珠花键副， 其特征在于： 所述花键套的外壁上形 成有与各走珠位——对应的若干个填珠孔， 该填珠孔径向贯穿对应的走珠位， 所述填珠孔内安装有堵头。
9.如权利要求 8 所述的滚珠花键副， 其特征在于： 所述填珠孔与主引道相 对。
10.如权利要求 1所述的滚珠花键副， 其特征在于： 所述滚动体为钢珠， 或 者滚柱。
PCT/CN2014/079285 2013-12-31 2014-06-05 一种滚珠花键副 WO2015100944A1 (zh)

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CN103742532B (zh) * 2013-12-31 2016-08-17 广州市昊志机电股份有限公司 一种滚珠花键副
CN109333352A (zh) * 2018-11-21 2019-02-15 华辰精密装备（昆山）股份有限公司 磨床尾架花键套筒结构
CN110345217A (zh) * 2019-07-14 2019-10-18 上海保良精密传动设备有限公司 一种内循环四沟道滚珠花键副及加工工艺

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