TW201248031A - Two-stage cross roller bearing - Google Patents

Two-stage cross roller bearing Download PDF

Info

Publication number
TW201248031A
TW201248031A TW100124455A TW100124455A TW201248031A TW 201248031 A TW201248031 A TW 201248031A TW 100124455 A TW100124455 A TW 100124455A TW 100124455 A TW100124455 A TW 100124455A TW 201248031 A TW201248031 A TW 201248031A
Authority
TW
Taiwan
Prior art keywords
roller
ring
track
center
roller bearing
Prior art date
Application number
TW100124455A
Other languages
Chinese (zh)
Other versions
TWI545272B (en
Inventor
Akihiro Yokoyama
Masashi Horiuchi
Naomi Shirasawa
Original Assignee
Harmonic Drive Systems
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harmonic Drive Systems filed Critical Harmonic Drive Systems
Publication of TW201248031A publication Critical patent/TW201248031A/en
Application granted granted Critical
Publication of TWI545272B publication Critical patent/TWI545272B/en

Links

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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/361—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers
    • F16C19/362—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers the rollers being crossed within the single row
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/55—Systems consisting of a plurality of bearings with rolling friction with intermediate floating or independently-driven rings rotating at reduced speed or with other differential ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

In a two-stage cross roller bearing (1), an outer ring (11), a middle ring (12), and an inner ring (13) are concentrically arranged, and the size of an outer roller (15), which is inserted in an outer raceway (14) between the outer ring (11) and the middle ring (12), is smaller than the size of an inner roller (17), which is inserted in an inner raceway (16) between the middle ring (12) and the inner ring (13). The center (L2) of the inner roller (17) is offset in the direction of a central axis (1a) with respect to the center (L1) of the outer roller (15). The thickness t (12) of the middle ring (12) in the radial direction is at least twice the thickness t (11) of the outer ring (11) in the radial direction. The preload deformation of the middle ring (12) can be minimized, and a two-stage cross roller bearing capable of ensuring the smooth rotation of the inner and outer rollers (15, 17), can be achieved.

Description

201248031 六、發明說明： 【發明所屬之技術領域】 本發明係有關兩組之十字滾子軸承爲同心狀配置之構 造的小型且緊緻的兩段式十字滾子軸承。 【先前技術】 十字滾子軸承，是在內環及外環之間所形成之矩形剖 面的圓環狀軌道以中心軸線爲交互正交狀態插入滾子，大 多用於受到徑向力及推力雙方的作用之軸承部分。 本案申請人於專利文獻1中，提案可取出同心雙軸之 旋轉的支承剛性高之扁平形多段十字滾子軸承。此多段十 字滾子軸承係具有第1十字滾子軸承與第2十字滾子軸承 ，於第1十字滾子軸承之內側同心狀地配置有第2十字滾 子軸承，第1十字滾子軸承之內環與第2十字滾子軸承之 外環係由單一之圓環狀構件的中間環所形成。於此中間環 之圓形外周面形成有第1十字滾子軸承的內環側軌道槽， 於該圓環狀構件之圓形內周面形成有第2十字滾子軸承之 外環側軌道槽。另外，於專利文獻2係提案同心狀地多段 配置著滾珠軸承的多段滾珠軸承° [先行技術文獻] [專利文獻1] WO 2003/050428號文件 [專利文獻2]日本特開2000-27857號公報 201248031 【發明內容】 [發明所欲解決的課題] 在將十字滾子軸承被同心狀配置的 承中，較大之預壓作用於中間環（作爲 承的內環及內側之十字滾子軸承的外環 此，造成中間環發生預壓變形，而無法 子軸承能夠平順旋轉的問題。 本發明之課題在於有鑑此點而提供 (作爲內環及外環）之預壓變形而確保 平順旋轉的兩段式十字滾子軸承。 [用以解決課題之手段] 爲解決上記課題，本發明之兩段式 徵係具備：外環；中間環，係同心狀地 側；內環’係同心狀地配置在該中間環 ，係矩形剖面之圓環狀且形成在前述外 間；複數之外側滾子，係轉動自如的狀 道內；內側軌道，係矩形剖面之圓環狀 環及前述內環之間；以及複數之內側滾 狀態下插入該內側軌道內，且前述內側 於前述外側滾子的滾子尺寸，前述內側 相對於前述外側滾子的滾子中心，位於 向呈偏置的位置。 因此’前述內側滾子之滾子中心相 兩段式十字滾子軸 外側之十字滾子軸 而發揮作用）。因 確保各段之十字滾 :能夠抑制中間環 各十字滾子軸承之 十字滾子軸承其特 配置在該外環之內 之內側；外側軌道 環及前述中間環之 態下插入該外側軌 且形成在前述中間 子，係轉動自如的 滾子的滾子尺寸小 滾子的滾子中心係 沿著前述軸線之方 對於前述外側滾子 -6- 201248031 之滾子中心的偏置量，可設爲從前述內側軌道之軌道寬度 的1/2，至該軌道寬度與前述外側軌道之軌道寬度的合計 値1/2爲止的範圍內之値。若偏置量小於此範圍內之値， 則無法充分地抑制中間環之預壓變形，而有無法確保內側 、外側十字滾子軸承進行平順旋轉之虞。此外，即使將偏 置量大於此範圍內之値，亦無法得到藉由偏置而達到中間 環的預壓變形抑制効果之進一步改善，使兩段式十字滾子 軸承之中心軸線方向的寬度尺寸變大，對兩段式十字滾子 軸承之扁平化反而不利。 爲了在有效抑制中間環之預壓變形的同時，使兩段式 十字滾子軸承扁平化，較佳爲將偏置量設爲前述外側軌道 之軌道寬度的1/2。 接著爲確實防止中間環之預壓變形，較佳爲該中間環 中從圓形內周面至圓形外周面爲止的半徑方向之厚度，至 少是從前述外環之圓形內周面至圓形外周面爲止的半徑方 向之厚度的2倍。 一方，爲提昇兩段式十字滾子軸承之組裝性，將前述 外側軌道及前述內側軌道，形成在前述外環、前述中間環 及前述內環當中，靠近該等其中一方之端面的位置，於前 述中間環及前述內環當中的前述端面，分別形成有滾子插 入用之插入孔。 [發明之效果] 本發明之兩段式十字滾子軸承係藉由外環、中間環、 201248031 外側軌道、及外側滾子構成大徑的外側十字滾子軸承，藉 由中間環、內環、內側軌道、及內側滾子構成小徑的內側 十字滾子軸承。位於外側之大徑的外側十字滾子軸承之滾 子尺寸較大，位於內側之小徑的內側十字滾子軸承之滾子 尺寸較小。所以，能夠在組裝兩段式十字滾子軸承之狀態 中，達到從內側及外側作用在中間環（屬於內外的十字滾 子軸承之共通零件）之預壓應力的均衡化。 此外，將外側十字滾子軸承之滾子中心與內側十字滾 子軸承之滾子中心，於該等中心軸線之方向上設置於偏置 的位置，故相較於此等在半徑方向位於同一平面狀態之場 合，能夠減少產生於中間環的預壓變形。此結果，能夠抑 制組裝兩段式十字滾子軸承之狀態下中間環的預壓變形， 且確保內側、外側之十字滾子軸承能夠平順地進行旋轉。 【實施方式】 參照圖面說明適用本發明之兩段式十字滾子軸承的實 施形態。如第1圖所示般，兩段式十字滾子軸承1係具備 :外環1 1 ;中間環1 2，係同心狀地配置在該外環1 1之內 側；內環1 3，係同心狀地配置在該中間環1 2之內側。於 外環1 1與中間環1 2之間係形成有矩形剖面之圓環狀的外 側軌道1 4，於該外側軌道1 4，以中心軸線交互正交之狀 態且以轉動自如的狀態插入有複數個外側滾子1 5。於中 間環1 2與內環1 3之間，亦形成有矩形剖面之圓環狀的內 側軌道1 6，於該內側軌道1 6，以中心軸線相互正交之狀 -8 - 201248031 態插入有複數個內側滾子17。 於中間環12中之其中一方的圓環狀端面12a，形成 有用於將外側滾子1 5插入外側軌道1 4內的插入孔1 2f， 此插入孔1 2 f係藉由栓1 8加以封鎖。同樣地，於內環1 3 中同一側之圓環狀端面1 3 a，形成有用於將內側滾子1 7 插入內側軌道1 6的插入孔1 3 f，此插入孔1 3 f則藉由栓 1 9加以封鎖。 於外環1 1兩側的圓環狀端面1 1 a、1 1 b，分別朝向圓 周方向’以一定之角度間隔形成有螺絲孔21、22。此等 螺絲孔係沿軸承中心軸線1 a之方向延伸即定深度的螺絲 孔。中間環1 2兩側的圓環狀端面1 2a、1 2b，亦朝向圓周 方向以即定之角度間隔形成有複數根的螺絲孔23、24。 此等螺絲孔23、24係沿軸承中心軸線1 a之方向延伸即定 深度的螺絲孔。同樣地，於內環1 3兩側之圓環狀端面 13a、13b亦朝向圓周方向以即定之角度間隔形成有複數 根的螺絲孔25、26。另外，在內環1 3形成有中心貫通孔 1 3 g，從此圓形內周面以一定寬度向內側突出的圓環狀凸 緣1 3 h ’係沿圓周方向以即定之角度間隔形成有螺絲插入 孔27。使用此等螺絲孔2 1〜26、螺絲插入孔27，可將其 他構件（未圖示）連結固定在外環1 1、中間環1 2、內環 1 3之兩側端面。 在此，內側滾子1 7之滾子尺寸係小於外側滾子1 5之 滾子尺寸，使外側十字滾子軸承之軸承負荷容量較大。此 外，內側滾子1 7的滾子中心L2係相對於外側滾子1 5的 -9 - 201248031 滾子中心L 1，位於沿著軸承中心軸線〗a之方向呈偏置的 位置。 於本例中，爲了在有效抑制中間環12之預壓變形的 同時’使兩段式十字滾子軸承1扁平化，令偏置量△爲外 側軌道14之軌道寬度w ( Μ )的1/2，滾子中心L2相對 於滾子中心L1爲偏置於圓環狀端面iia~i3a側的位置。 偏置量△係較佳爲從內側軌道16之軌道寬度w(16)的 1/2’至該軌道寬度w(16)與外側軌道14之軌道寬度w (I4)的合計値1/2爲止之範圍內的値。· w (16) / 2< Δ < {w (16) +w (14))/2 另外，爲確實地防止中間環12之預壓變形，從該中 間環12之圓形內周面1 2d至圓形外周面12e爲止之半徑 方向的厚度t(12)，係設定爲從外環11之圓形內周面 lid至圓形外周面lie爲止間之半徑方向的厚度t(ll) 的2倍以上。 而且，外環1 1、中間環12及內環13中同一側之圓 環狀端面1 1 a、1 2 a、1 3 a大致位於同一面上，外側軌道 1 4係位於比圓環狀端面1 1 b、1 2b靠近圓環狀端面1 1 a、 1 2a側的位置。另外’內側軌道1 6亦位於比圓環狀端面 12b、13b靠近圓環狀端面12a ' 13a側的位置。如前述般 ，於圓環狀端面12a、13a形成有插入孔12f、13f。如此 般，使外側軌道1 4、內側軌道1 ό ’於該等之軸承中心軸 線la之方向上’位於靠近滾子插入側之圓環狀端面l2a 、1 3 a側的位置。所以’能夠將兩段式十字滾子軸承1之 -10- 201248031 組裝性、滾子之插入作業的作業性加以提昇。 【圖式簡單說明】 第1圖係適用本發明之兩段式十字滾+子軸承的端面圖 及縱剖面圖。 【主要元件符號說明】 1:兩段式十字滾子軸承 I a :軸承中心軸線 II :外環 11a、lib:圓環狀端面 1 1 d :圓形內周面 1 1 e :圓形外周面 1 2 :中間環 lh、1讪：圓環狀端面 12d:圓形內周面 1 2 e :圓形外周面 1 2 f :插入孔 1 3 :內環 13a、13b:圓環狀端面 1 3 f :插入孔 1 3 g :中心貫通孔 13h. Η環狀凸緣 1 4 :外側軌道 -11 - 201248031 1 5 :外側滾子 1 6 :內側軌道 1 7 :內側滾子 1 8、1 9 :栓 21、 22、 23、 24、 25、 26:螺絲孔 2 7 :螺絲插入孔 L 1 :外側滾子1 5之滾子中心 L2 :內側滾子17之滾子中心 △ •偏置量 -12-201248031 VI. Description of the Invention: [Technical Field] The present invention relates to a small and compact two-stage cross roller bearing in which two sets of cross roller bearings are constructed in a concentric configuration. [Prior Art] A cross-roller bearing is a circular cross-section of an annular track formed between an inner ring and an outer ring. The central axis is inserted into the roller in an orthogonal state, and is mostly used for both radial force and thrust. The bearing part of the role. In the patent document 1, the applicant of the present invention proposed to take out a flat multi-section cross roller bearing having a high rigidity and supporting a rotation of a concentric biaxial rotation. The multi-stage cross roller bearing has a first cross roller bearing and a second cross roller bearing, and a second cross roller bearing is disposed concentrically inside the first cross roller bearing, and the first cross roller bearing is The outer ring of the inner ring and the second cross roller bearing is formed by an intermediate ring of a single annular member. An inner ring side track groove of the first cross roller bearing is formed on the circular outer peripheral surface of the intermediate ring, and a second cross roller bearing outer ring side track groove is formed on the circular inner peripheral surface of the annular member. . In addition, in the case of the patent document 2, a multi-stage ball bearing in which a ball bearing is arranged in a plurality of stages is proposed in a concentric manner. [Prior Art Document] [Patent Document 1] WO 2003/050428 [Patent Document 2] JP-A-2000-27857 201248031 [Description of the Invention] [Problems to be Solved by the Invention] In a bearing in which a cross roller bearing is concentrically arranged, a large preload is applied to the intermediate ring (as the inner ring and the inner cross roller bearing) The outer ring causes the intermediate ring to undergo pre-compression deformation, and the sub-bearing can not smoothly rotate. The object of the present invention is to provide pre-compression deformation (as the inner ring and the outer ring) to ensure smooth rotation. Two-stage cross roller bearing. [Means for Solving the Problem] In order to solve the above problem, the two-stage levy of the present invention has: an outer ring; an intermediate ring, which is concentric; the inner ring is concentrically The intermediate ring is disposed in an annular shape and has an annular shape formed on the outer portion; the plurality of outer side rollers are in a freely rotatable manner; the inner rail is a circular ring having a rectangular cross section and the inner portion And a plurality of rollers inserted into the inner rail in an inner rolling state, and the inner side of the outer roller has a roller size, and the inner side is located at an offset position with respect to a roller center of the outer roller. Therefore, the roller center of the inner roller functions as a cross roller shaft on the outer side of the two-stage cross roller shaft. By ensuring the cross roll of each segment: the cross roller bearing capable of suppressing the cross roller bearings of the intermediate ring is specially disposed inside the outer ring; the outer track ring and the intermediate ring are inserted into the outer rail and formed In the above-mentioned intermediate, the roller center of the roller that is rotatable is small, and the roller center of the small roller along the aforementioned axis is offset from the roller center of the outer roller-6-201248031. 1/2 of the track width of the inner track is within a range from the total width 该 1/2 of the track width to the track width of the outer track. If the offset amount is less than the range within this range, the pre-compression deformation of the intermediate ring cannot be sufficiently suppressed, and the inner and outer cross roller bearings cannot be smoothly rotated. Further, even if the offset amount is larger than the range within the range, the further improvement of the pre-compression deformation suppressing effect of the intermediate ring by the offset cannot be obtained, and the width dimension of the two-stage cross roller bearing in the central axis direction is obtained. Larger, it is not good for the flattening of the two-stage cross roller bearing. In order to flatten the two-stage cross roller bearing while effectively suppressing the pre-pressure deformation of the intermediate ring, it is preferable to set the offset amount to 1/2 of the track width of the outer track. Next, in order to surely prevent the pre-compression deformation of the intermediate ring, it is preferable that the thickness of the intermediate ring from the circular inner peripheral surface to the circular outer peripheral surface is at least from the circular inner peripheral surface of the outer ring to the circle. The thickness of the outer peripheral surface is twice as large as the thickness in the radial direction. In order to improve the assemblability of the two-stage cross roller bearing, the outer rail and the inner rail are formed in the outer ring, the intermediate ring, and the inner ring, and are located close to one of the end faces. An insertion hole for inserting a roller is formed in each of the intermediate ring and the end surface of the inner ring. [Effects of the Invention] The two-stage cross roller bearing of the present invention comprises a large-diameter outer cross roller bearing by an outer ring, an intermediate ring, a 201248031 outer rail, and an outer roller, with an intermediate ring, an inner ring, The inner rail and the inner roller form a small inner roller roller bearing. The outer cross roller bearing of the large diameter on the outer side has a large roller size, and the inner cross roller bearing on the inner side has a small roller size. Therefore, in the state in which the two-staged cross roller bearing is assembled, the pre-stressing stress which acts on the intermediate ring (the common part of the inner and outer cross roller bearings) from the inner side and the outer side can be equalized. In addition, the center of the roller of the outer cross roller bearing and the center of the roller of the inner cross roller bearing are disposed at the offset position in the direction of the central axes, so that they are in the same plane in the radial direction. In the case of the state, the pre-compression deformation occurring in the intermediate ring can be reduced. As a result, it is possible to suppress the pre-compression deformation of the intermediate ring in the state in which the two-stage cross roller bearing is assembled, and to ensure that the inner and outer cross roller bearings can smoothly rotate. [Embodiment] An embodiment of a two-stage type cross roller bearing to which the present invention is applied will be described with reference to the drawings. As shown in Fig. 1, the two-stage cross roller bearing 1 includes an outer ring 1 1 and an intermediate ring 12 which is concentrically arranged inside the outer ring 1 1 and an inner ring 13 which is concentric. It is disposed inside the intermediate ring 12 . An annular outer rail 14 having a rectangular cross section is formed between the outer ring 1 1 and the intermediate ring 1 2, and the outer rail 14 is inserted in a state in which the central axes are alternately orthogonal and rotatably inserted. A plurality of outer rollers 1 5 . Between the intermediate ring 12 and the inner ring 13 , an annular inner rail 1 6 having a rectangular cross section is also formed, and the inner rail 16 is inserted in a state in which the central axes are orthogonal to each other -8 - 201248031. A plurality of inner rollers 17 are provided. An annular end surface 12a of one of the intermediate rings 12 is formed with an insertion hole 1 2f for inserting the outer roller 15 into the outer rail 1 4, and the insertion hole 1 2 f is blocked by the plug 18 . Similarly, an annular end face 13 3 a on the same side of the inner ring 13 is formed with an insertion hole 1 3 f for inserting the inner roller 17 into the inner rail 16 , and the insertion hole 1 3 f is formed by Plug 1 9 to block. The annular end faces 1 1 a and 1 1 b on both sides of the outer ring 1 are respectively formed with screw holes 21 and 22 at regular angular intervals toward the circumferential direction. These screw holes extend in the direction of the bearing center axis 1 a, that is, the screw holes of a predetermined depth. The annular end faces 1 2a, 1 2b on both sides of the intermediate ring 12 are also formed with a plurality of screw holes 23, 24 at a predetermined angular interval in the circumferential direction. These screw holes 23, 24 are screw holes extending in a direction of the bearing center axis 1a, that is, a predetermined depth. Similarly, the annular end faces 13a, 13b on both sides of the inner ring 13 are also formed with a plurality of screw holes 25, 26 at a predetermined angular interval in the circumferential direction. Further, a center through hole 1 3 g is formed in the inner ring 13 , and an annular flange 1 3 h ' projecting inward from the circular inner peripheral surface with a constant width is formed with screws at a predetermined angular interval in the circumferential direction. Insert the hole 27. By using these screw holes 2 1 to 26 and the screw insertion hole 27, other members (not shown) can be coupled and fixed to the end faces of the outer ring 1 1 , the intermediate ring 1 2 , and the inner ring 13 . Here, the roller size of the inner roller 17 is smaller than the roller size of the outer roller 15, so that the bearing capacity of the outer cross roller bearing is large. Further, the roller center L2 of the inner roller 17 is located at a position offset from the center axis A of the bearing with respect to the roller center L1 of the outer roller 15 of -9 - 201248031. In the present example, in order to flatten the two-stage cross roller bearing 1 while effectively suppressing the pre-pressure deformation of the intermediate ring 12, the offset amount Δ is 1/ of the track width w ( Μ ) of the outer rail 14 2. The roller center L2 is offset from the roller center L1 at a position offset from the annular end faces iia to i3a. The offset amount Δ is preferably from 1/2' of the track width w (16) of the inner track 16 to the total 値 1/2 of the track width w (16) of the outer track 14 and the track width w (I4) of the outer track 14. Within the scope of the 値. w (16) / 2 < Δ < {w (16) + w (14)) / 2 In addition, in order to surely prevent the pre-compression deformation of the intermediate ring 12, the circular inner peripheral surface 1 of the intermediate ring 12 The thickness t (12) in the radial direction from 2d to the circular outer peripheral surface 12e is set to a thickness t (ll) in the radial direction from the circular inner peripheral surface lid of the outer ring 11 to the circular outer peripheral surface lie. More than 2 times. Further, the annular end faces 1 1 a, 1 2 a, and 1 3 a on the same side of the outer ring 1 1 , the intermediate ring 12 , and the inner ring 13 are substantially on the same plane, and the outer rail 14 is located on the annular end surface. 1 1 b and 1 2b are close to the positions of the annular end faces 1 1 a and 1 2a. Further, the inner rail 16 is located closer to the annular end surface 12a ' 13a than the annular end surfaces 12b and 13b. As described above, the insertion holes 12f and 13f are formed in the annular end faces 12a and 13a. In this manner, the outer rail 14 and the inner rail 1 ό ' are positioned in the direction of the bearing center axis la in the vicinity of the annular end faces l2a and 1 3 a on the roller insertion side. Therefore, it is possible to improve the workability of the assembly of the two-stage cross roller bearing 1 -10- 201248031 and the insertion work of the roller. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an end view and a longitudinal sectional view of a two-stage cross roll + sub-bearing to which the present invention is applied. [Description of main component symbols] 1: Two-stage cross roller bearing I a : Bearing center axis II: Outer ring 11a, lib: Annular end face 1 1 d : Round inner peripheral surface 1 1 e : Round outer peripheral surface 1 2 : intermediate ring lh, 1 讪: annular end face 12d: circular inner peripheral surface 1 2 e : circular outer peripheral surface 1 2 f : insertion hole 1 3 : inner ring 13a, 13b: annular end face 1 3 f : insertion hole 1 3 g : center through hole 13h. Η annular flange 1 4 : outer rail 11 - 201248031 1 5 : outer roller 1 6 : inner rail 1 7 : inner roller 1 8 , 1 9 : Bolt 21, 22, 23, 24, 25, 26: Screw hole 2 7 : Screw insertion hole L 1 : Roller center L2 of outer roller 1 5: Roller center of inner roller 17 △ • Offset amount -12 -

Claims (1)

201248031 七、申請專利範圍： 1.—種兩段式十字滾子軸承（1)，其特徵係具備： 外環（11 ); 中間環（1 2 ) ’係同心狀地配置在該外環（1 1 )之內 側； 內環（1 3 ) ’係同心狀地配置在該中間環（1 2 )之內 側； 外側軌道（1 4 )，係呈矩形剖面之圓環狀且形成在前 述外環（1 1 )及前述中間環（1 2 )之間； 複數之外側滾子（1 5 )，係以轉動自如的狀態下插入 該外側軌道（1 4 )內； 內側軌道（1 6 )’係呈矩形剖面之圓環狀且形成在前 述中間環（12 )及前述內環（」3 )之間；以及 複數之內側滾子（1 7 )，係轉動自如的狀態下插入該 內側軌道（1 6 )內， 且前述內側滾子（1 7 )的滾子尺寸小於前述外側滾子 (1 5 )的滾子尺寸，前述內側滾子（】7 )的滾子中心（L2 )係相對於前述外側滾子（1 5 )的滾子中心（L 1 )，位於 沿著軸承中心軸線（1 a )之方向呈偏置的位置。 2 ·如申請專利範圍第1項所述之兩段式十字滾子軸 承（1 )，其中， 前述內側滾子（1 7 )之滾子中心（L2 )相對於前述外 側滾子（1 5 )之滾子中心（L丨）的偏置量（△)，係從前 述內側軌道（16)的軌道寬度之〗/2，至該軌道寬度與前 -13- 201248031 述外側軌道（14)的軌道寬度之合計値的1/2爲止的範圍 內之値。 3 .如申請專利範圍第1項所述之兩段式十字滾子軸 承（1 )，其中， 前述內側滾子（1 7 )之滾子中心（L2 )相對於前述外 側滾子（1 5 )之滾子中心（L1 )的偏置量（Δ )係前述外 側軌道（1 4 )之軌道寬度的1 /2。 4.如申請專利範圍第1項所述之兩段式十字滾子軸 承（1 )，其中， 從前述中間環（12)之圓形內周面至圓形外周面爲止 的半徑方向之厚度，至少是從前述外環（11)之圓形內周 面至圓形外周面爲止的半徑方向之厚度的2倍。 5 .如申請專利範圍第1〜4項中任一項所述之兩段式 十字滾子軸承（1)，其中， 前述外側軌道（1 4 )及前述內側軌道（1 6 )，係在前 述外環（11)、前述中間環（12)及前述內環（13)中， 形成於其等之一端面附近的位置，於前述中間環（12)及 前述內環（13)中的前述端面，分別形成有滾子插入用之 插入孔（12f、13f)，且此等插入孔藉由栓（1 8、19 )加 以封鎖。 -14-201248031 VII. Patent application scope: 1. A two-stage cross-roller bearing (1), characterized by: an outer ring (11); an intermediate ring (1 2 ) ' is concentrically arranged in the outer ring ( 1 1 ) inner side; inner ring (1 3 ) ' is concentrically disposed inside the intermediate ring (1 2 ); outer track (14) is annular in shape and formed in the outer ring (1 1 ) and the intermediate ring (1 2 ); the plurality of outer side rollers (15) are inserted into the outer rail (1 4 ) in a freely rotatable state; the inner rail (16) a circular cross section is formed between the intermediate ring (12) and the inner ring ("3); and a plurality of inner rollers (17) are inserted into the inner track in a freely rotatable state (1) 6), wherein the roller size of the inner roller (17) is smaller than the roller size of the outer roller (15), and the roller center (L2) of the inner roller (7) is relative to the foregoing The roller center (L 1 ) of the outer roller (15) is located offset from the bearing center axis (1 a )2. The two-stage cross roller bearing (1) according to claim 1, wherein the roller center (L2) of the inner roller (17) is opposite to the outer roller (15) The offset amount (Δ) of the roller center (L丨) is from the track width of the inner track (16) to /2, to the track width and the track of the outer track (14) of the front-13-201248031.値 within the range of 1/2 of the total width. 3. The two-stage cross roller bearing (1) according to claim 1, wherein the roller center (L2) of the inner roller (17) is opposite to the outer roller (15) The offset amount (Δ) of the roller center (L1) is 1 /2 of the track width of the outer track (14). 4. The two-stage cross roller bearing (1) according to the first aspect of the invention, wherein a thickness in a radial direction from a circular inner circumferential surface of the intermediate ring (12) to a circular outer circumferential surface, At least twice the thickness in the radial direction from the circular inner circumferential surface of the outer ring (11) to the circular outer circumferential surface. The two-stage cross-roller bearing (1) according to any one of claims 1 to 4, wherein the outer rail (14) and the inner rail (16) are in the foregoing The outer ring (11), the intermediate ring (12), and the inner ring (13) are formed at positions near one end surface of the inner ring (11), and the end faces of the intermediate ring (12) and the inner ring (13). Insertion holes (12f, 13f) for roller insertion are respectively formed, and these insertion holes are blocked by the plugs (18, 19). -14-
TW100124455A 2011-05-16 2011-07-11 Two-stage cross roller bearing TWI545272B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/002719 WO2012157021A1 (en) 2011-05-16 2011-05-16 Two-stage cross roller bearing

Publications (2)

Publication Number Publication Date
TW201248031A true TW201248031A (en) 2012-12-01
TWI545272B TWI545272B (en) 2016-08-11

Family

ID=47176392

Family Applications (1)

Application Number Title Priority Date Filing Date
TW100124455A TWI545272B (en) 2011-05-16 2011-07-11 Two-stage cross roller bearing

Country Status (5)

Country Link
JP (1) JPWO2012157021A1 (en)
KR (1) KR20140024008A (en)
CN (1) CN103534495B (en)
TW (1) TWI545272B (en)
WO (1) WO2012157021A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3022310B1 (en) * 2014-06-11 2017-03-17 Ntn-Snr Roulements BEARING WITH TWO CONCENTRIC ROWS OF ROLLING BODIES AND METHOD OF MANUFACTURING A BEARING.
WO2017109826A1 (en) * 2015-12-21 2017-06-29 株式会社ハーモニック・ドライブ・システムズ Crossed roller bearing
JP6899279B2 (en) * 2017-08-23 2021-07-07 日本トムソン株式会社 Cross roller bearing
CN107676388A (en) * 2017-11-24 2018-02-09 北京明正维元电机技术有限公司 A kind of double raceway circle bodies of high speed compound roller bearing
KR102703625B1 (en) * 2022-02-22 2024-09-06 김종복 Different diameter Bearing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3698855B2 (en) * 1996-07-31 2005-09-21 ナブテスコ株式会社 Rotating motion transmission device
JP2001116040A (en) * 1999-10-20 2001-04-27 Harmonic Drive Syst Ind Co Ltd Cross roller bearing
TW550350B (en) * 2001-12-11 2003-09-01 Harmonic Drive Systems Multistage cross roller bearing
DE102005047270B4 (en) * 2005-10-01 2016-03-10 Schaeffler Technologies AG & Co. KG roller bearing
JP4920238B2 (en) * 2005-10-25 2012-04-18 Ｎｔｎ株式会社 Tapered roller bearing
JP5438297B2 (en) * 2008-10-10 2014-03-12 ナブテスコ株式会社 Eccentric oscillating gear unit

Also Published As

Publication number Publication date
WO2012157021A1 (en) 2012-11-22
TWI545272B (en) 2016-08-11
JPWO2012157021A1 (en) 2014-07-31
CN103534495A (en) 2014-01-22
KR20140024008A (en) 2014-02-27
CN103534495B (en) 2016-04-20

Similar Documents

Publication Publication Date Title
TW201248031A (en) Two-stage cross roller bearing
JP4476286B2 (en) Compound rolling bearing
TW201031831A (en) Cross roller bearing, angular roller bearing, and method of manufacturing cross roller bearing and angular roller
WO2008119597A3 (en) Axial angular contact ball bearing arranged in four rows, comprising spherical rollers, particularly for mounting a rotary table on machine tools
JP2006200677A (en) Thrust ball bearing
JP5433789B2 (en) A method of axially positioning the bearing on the shaft journal.
TWI703275B (en) Double row cylindrical roller bearing
JP2014137097A (en) Rolling bearing, and bearing unit
US8950943B2 (en) Roller bearing
JP2012193859A (en) Bearing
JPWO2006112378A1 (en) Cylindrical roller bearing
JP2008185051A5 (en)
JP2008261458A (en) Tapered roller bearing
JP2021063573A5 (en)
TWI716538B (en) Combined cylindrical roller bearing
CN203717633U (en) Ball bearing unit for turbocharger
JP2013053716A (en) Self-aligning roller bearing and turning wheel support structure
CN202790077U (en) Combined angular contact ball bearing
JP6303262B2 (en) Rolling bearing
JP2004332844A (en) Rolling bearing
JP5793217B2 (en) Double row slewing bearing
KR101585798B1 (en) A Low Torque Hybrid Bearing
JP2014240672A (en) Bearing device
TWM626475U (en) Roller cage for cycloid reducer
JP2004028139A (en) Double-row tapered roller bearing with aligning ring