WO2012157021A1 - 2段クロスローラベアリング - Google Patents
2段クロスローラベアリング Download PDFInfo
- Publication number
- WO2012157021A1 WO2012157021A1 PCT/JP2011/002719 JP2011002719W WO2012157021A1 WO 2012157021 A1 WO2012157021 A1 WO 2012157021A1 JP 2011002719 W JP2011002719 W JP 2011002719W WO 2012157021 A1 WO2012157021 A1 WO 2012157021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- ring
- roller bearing
- center
- raceway
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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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
- 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
Definitions
- the present invention relates to a compact and compact two-stage cross roller bearing having a structure in which two sets of cross roller bearings are arranged concentrically.
- a cross roller bearing is a bearing portion in which a roller is inserted in an annular raceway having a rectangular cross section formed between an inner ring and an outer ring in a state where center axes are alternately orthogonal, and both radial force and thrust force act. Is often used.
- the present applicant has proposed a flat multi-stage cross roller bearing with high support rigidity capable of taking out the rotation of two concentric axes in Patent Document 1.
- the multi-stage cross roller bearing has a first cross roller bearing and a second cross roller bearing, and the second cross roller bearing is disposed concentrically inside the first cross roller bearing, and the first cross roller bearing
- the inner ring of the roller bearing and the outer ring of the second cross roller bearing are formed from an intermediate ring which is a single annular member.
- the inner ring side raceway groove of the first cross roller bearing is formed on the circular outer peripheral surface of the intermediate ring, and the outer ring side raceway groove of the second cross roller bearing is formed on the circular inner peripheral surface of the annular member.
- Patent Document 2 proposes a multistage ball bearing in which ball bearings are arranged in multiple stages concentrically.
- an object of the present invention is to propose a two-stage cross roller bearing capable of suppressing the preload deformation of the intermediate wheel functioning as an inner ring and an outer ring and ensuring smooth rotation of each cross roller bearing.
- the two-stage cross roller bearing of the present invention is: An outer ring, an intermediate ring arranged concentrically inside the outer ring, an inner ring arranged concentrically inside the intermediate ring, an annular ring having a rectangular cross section formed between the outer ring and the intermediate ring
- a plurality of inner rollers inserted in a freely rolling manner in the track
- the roller size of the inner roller is smaller than the roller size of the outer roller
- the roller center of the inner roller is at a position offset in the direction along the axis with respect to the roller center of the outer roller.
- the offset amount of the roller center of the inner roller with respect to the roller center of the outer roller is from 1/2 of the track width of the inner track to 1 / of the added value of the track width and the track width of the outer track. It can be a value in the range up to 2. If the offset amount is less than the value within this range, the preload deformation of the intermediate wheel cannot be sufficiently suppressed, and there is a risk that smooth rotation of the inner and outer cross roller bearings cannot be ensured.
- the offset amount be 1 ⁇ 2 of the track width of the outer track.
- the radial thickness between the circular inner peripheral surface and the circular outer peripheral surface of the intermediate wheel is set at least from the circular inner peripheral surface of the outer ring. It is desirable that the thickness in the radial direction between the circular outer peripheral surface is doubled.
- the outer race and the inner race are formed at positions close to one end face of the outer race, the intermediate race and the inner race, and the intermediate race It is desirable that an insertion hole for inserting a roller is formed in each of the end surfaces of the ring and the inner ring.
- a large-diameter outer cross roller bearing is constituted by the outer ring, the intermediate ring, the outer raceway, and the outer roller
- a small-diameter inner cross roller is constituted by the intermediate ring, the inner race, the inner raceway, and the inner roller.
- a bearing is constructed.
- a large-diameter outer cross roller bearing located on the outside has a large roller size
- a small-diameter inner cross-roller bearing located on the inside has a small roller size. Therefore, in a state where the two-stage cross roller bearing is assembled, it is possible to balance the preload stress acting from the inside and the outside on the intermediate wheel which is a common part of the inner and outer cross roller bearings.
- roller center of the outer cross roller bearing and the roller center of the inner cross roller bearing are offset from each other in the direction of the center axis, compared to the case where they are positioned in the same plane in the radial direction, Preload deformation that occurs in the intermediate wheel can be reduced. As a result, the preload deformation of the intermediate wheel in a state where the two-stage cross roller bearing is assembled can be suppressed, and smooth rotation of the inner and outer cross roller bearings can be ensured.
- the two-stage cross roller bearing 1 includes an outer ring 11, an intermediate ring 12 arranged concentrically inside the outer ring 11, and an inner ring 13 arranged concentrically inside the intermediate ring 12. It has.
- An annular outer raceway 14 having a rectangular cross section is formed between the outer race 11 and the intermediate race 12, and a plurality of outer rollers 15 roll on the outer raceway 14 in a state where the central axes are alternately orthogonal to each other. It is inserted freely.
- An annular inner raceway 16 having a rectangular cross section is also formed between the intermediate ring 12 and the inner race 13, and a plurality of inner rollers 17 are inserted into the inner raceway 16 with the central axes alternately orthogonal to each other. Has been.
- An insertion hole 12f for inserting the outer roller 15 into the outer track 14 is formed in one annular end surface 12a of the intermediate ring 12, and this insertion hole 12f is sealed by a stopper 18.
- an insertion hole 13 f for inserting the inner roller 17 into the inner track 16 is formed in the annular end surface 13 a on the same side of the inner ring 13, and the insertion hole 13 f is sealed by a plug 19.
- Screw holes 21 and 22 are formed in the annular end surfaces 11a and 11b on both sides of the outer ring 11 at regular angular intervals in the circumferential direction, respectively. These are screw holes of a predetermined depth extending in the direction of the bearing center axis 1a.
- a plurality of screw holes 23 and 24 are also formed in the annular end faces 12a and 12b on both sides of the intermediate ring 12 at predetermined angular intervals in the circumferential direction. These screw holes 23 and 24 are also screw holes having a predetermined depth extending in the direction of the bearing center axis 1a.
- a plurality of screw holes 25 and 26 are formed at predetermined angular intervals in the circumferential direction on the annular end faces 13a and 13b on both sides of the inner ring 13 as well.
- a central through hole 13g is formed in the inner ring 13
- a screw insertion hole 27 is provided at a predetermined angular interval in the circumferential direction in an annular flange 13h protruding inward from the circular inner peripheral surface with a constant width. Is formed.
- another member (not shown) can be connected and fixed to the end faces on both sides of the outer ring 11, the intermediate ring 12 and the inner ring 13.
- the roller size of the inner roller 17 is smaller than the roller size of the outer roller 15, and the outer cross roller bearing has a larger bearing load capacity.
- the roller center L2 of the inner roller 17 is offset from the roller center L1 of the outer roller 15 in the direction along the bearing center axis 1a.
- the offset amount ⁇ is 1 ⁇ 2 of the track width w (14) of the outer track 14.
- the roller center L2 is offset from the roller center L1 toward the annular end faces 11a to 13a.
- the offset amount ⁇ is in the range from 1/2 of the track width w (16) of the inner track 16 to 1/2 of the sum of the track width w (16) and the track width w (14) of the outer track 14. It is desirable to set the value of. w (16) / 2 ⁇ ⁇ w (16) + w (14) ⁇ / 2
- the thickness t (12) in the radial direction between the circular inner peripheral surface 12d and the circular outer peripheral surface 12e of the intermediate ring 12 has a circular shape of the outer ring 11.
- the radial thickness t (11) between the inner peripheral surface 11d and the circular outer peripheral surface 11e is set to be twice or more.
- annular end surfaces 11a, 12a, 13a on the same side of the outer ring 11, the intermediate ring 12, and the inner ring 13 are located on substantially the same plane, and the outer race 14 is more annular end surface than the annular end surfaces 11b, 12b. It is in a position close to the side of 11a, 12a.
- the inner track 16 is located closer to the annular end surfaces 12a and 13a than the annular end surfaces 12b and 13b.
- the insertion holes 12f and 13f are formed in the annular end faces 12a and 13a. In this way, the outer track 14 and the inner track 16 are brought close to the annular end surfaces 12a and 13a on the roller insertion side in the direction of the bearing center axis 1a. Therefore, the assemblability of the two-stage cross roller bearing 1 and the workability of the roller insertion work can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
外輪と、当該外輪の内側に同心状態に配置した中間輪と、当該中間輪の内側に同心状態に配置した内輪と、前記外輪および前記中間輪の間に形成されている矩形断面の円環状の外側軌道と、当該外側軌道内に転動自在の状態で挿入されている複数の外側ローラと、前記中間輪および前記内輪の間に形成されている矩形断面の円環状の内側軌道と、当該内側軌道内に転動自在の状態で挿入されている複数の内側ローラとを備えており、
前記内側ローラのローラサイズは、前記外側ローラのローラサイズよりも小さく、
前記内側ローラのローラ中心は、前記外側ローラのローラ中心に対して、前記軸線に沿った方向にオフセットした位置にあることを特徴としている。
w(16)/2< Δ <{w(16)+w(14)}/2
Claims (5)
- 外輪(11)と、
当該外輪(11)の内側に同心状態に配置した中間輪(12)と、
当該中間輪(12)の内側に同心状態に配置した内輪(13)と、
前記外輪(11)および前記中間輪(12)の間に形成されている矩形断面の円環状の外側軌道(14)と、
当該外側軌道(14)内に転動自在の状態で挿入されている複数の外側ローラ(15)と、
前記中間輪(12)および前記内輪(13)の間に形成されている矩形断面の円環状の内側軌道(16)と、
当該内側軌道(16)内に転動自在の状態で挿入されている複数の内側ローラ(17)とを備えており、
前記内側ローラ(17)のローラサイズは、前記外側ローラ(15)のローラサイズよりも小さく、
前記内側ローラ(17)のローラ中心(L2)は、前記外側ローラ(15)のローラ中心(L1)に対して、ベアリング中心軸線(1a)に沿った方向にオフセットした位置にあることを特徴とする2段クロスローラベアリング(1)。 - 請求項1において、
前記内側ローラ(17)のローラ中心(L2)の前記外側ローラ(15)のローラ中心(L1)に対するオフセット量(Δ)は、前記内側軌道(16)の軌道幅の1/2から、当該軌道幅と前記外側軌道(14)の軌道幅との加算値の1/2までの範囲内の値であることを特徴とする2段クロスローラベアリング(1)。 - 請求項1において、
前記内側ローラ(17)のローラ中心(L2)の前記外側ローラ(15)のローラ中心(L1)に対するオフセット量(Δ)は、前記外側軌道(14)の軌道幅の1/2であることを特徴とする2段クロスローラベアリング(1)。 - 請求項1において、
前記中間輪(12)における円形内周面から円形外周面までの間の半径方向の厚さは、少なくとも、前記外輪(11)の円形内周面から円形外周面までの間の半径方向の厚さの2倍であることを特徴とする2段クロスローラベアリング(1)。 - 請求項1ないし4のうちのいずれかの項において、
前記外側軌道(14)および前記内側軌道(16)は、前記外輪(11)、前記中間輪(12)および前記内輪(13)において、それらの一方の端面に近い位置に形成されており、
前記中間輪(12)および前記内輪(13)における前記端面に、それぞれ、ローラ挿入用の挿入孔(12f、13f)が形成され、これらの挿入孔が栓(18、19)によって封鎖されていることを特徴とする2段クロスローラベアリング(1)。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201180070879.1A CN103534495B (zh) | 2011-05-16 | 2011-05-16 | 两级交叉滚子轴承 |
| KR1020137031334A KR20140024008A (ko) | 2011-05-16 | 2011-05-16 | 2단 크로스롤러 베어링 |
| PCT/JP2011/002719 WO2012157021A1 (ja) | 2011-05-16 | 2011-05-16 | 2段クロスローラベアリング |
| JP2013514851A JPWO2012157021A1 (ja) | 2011-05-16 | 2011-05-16 | 2段クロスローラベアリング |
| TW100124455A TWI545272B (zh) | 2011-05-16 | 2011-07-11 | 兩段式十字滾子軸承 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/002719 WO2012157021A1 (ja) | 2011-05-16 | 2011-05-16 | 2段クロスローラベアリング |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012157021A1 true WO2012157021A1 (ja) | 2012-11-22 |
Family
ID=47176392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/002719 Ceased WO2012157021A1 (ja) | 2011-05-16 | 2011-05-16 | 2段クロスローラベアリング |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPWO2012157021A1 (ja) |
| KR (1) | KR20140024008A (ja) |
| CN (1) | CN103534495B (ja) |
| TW (1) | TWI545272B (ja) |
| WO (1) | WO2012157021A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2955403A1 (fr) | 2014-06-11 | 2015-12-16 | NTN-SNR Roulements | Roulement à deux rangées concentriques de corps roulants |
| CN107676388A (zh) * | 2017-11-24 | 2018-02-09 | 北京明正维元电机技术有限公司 | 一种高速复合滚子轴承双滚道圈体 |
| CN108368876A (zh) * | 2015-12-21 | 2018-08-03 | 谐波传动系统有限公司 | 交叉滚子轴承 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6899279B2 (ja) * | 2017-08-23 | 2021-07-07 | 日本トムソン株式会社 | クロスローラ軸受 |
| KR102703625B1 (ko) * | 2022-02-22 | 2024-09-06 | 김종복 | 이경베어링 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001116040A (ja) * | 1999-10-20 | 2001-04-27 | Harmonic Drive Syst Ind Co Ltd | クロスローラベアリング |
| WO2003050428A1 (en) * | 2001-12-11 | 2003-06-19 | Harmonic Drive Systems Inc. | Multi-stage cross roller bearing |
| JP2010091073A (ja) * | 2008-10-10 | 2010-04-22 | Nabtesco Corp | 偏心揺動型歯車装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3698855B2 (ja) * | 1996-07-31 | 2005-09-21 | ナブテスコ株式会社 | 回転運動伝動装置 |
| DE102005047270B4 (de) * | 2005-10-01 | 2016-03-10 | Schaeffler Technologies AG & Co. KG | Wälzlager |
| JP4920238B2 (ja) * | 2005-10-25 | 2012-04-18 | Ntn株式会社 | 円すいころ軸受 |
-
2011
- 2011-05-16 CN CN201180070879.1A patent/CN103534495B/zh active Active
- 2011-05-16 JP JP2013514851A patent/JPWO2012157021A1/ja active Pending
- 2011-05-16 WO PCT/JP2011/002719 patent/WO2012157021A1/ja not_active Ceased
- 2011-05-16 KR KR1020137031334A patent/KR20140024008A/ko not_active Ceased
- 2011-07-11 TW TW100124455A patent/TWI545272B/zh active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001116040A (ja) * | 1999-10-20 | 2001-04-27 | Harmonic Drive Syst Ind Co Ltd | クロスローラベアリング |
| WO2003050428A1 (en) * | 2001-12-11 | 2003-06-19 | Harmonic Drive Systems Inc. | Multi-stage cross roller bearing |
| JP2010091073A (ja) * | 2008-10-10 | 2010-04-22 | Nabtesco Corp | 偏心揺動型歯車装置 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2955403A1 (fr) | 2014-06-11 | 2015-12-16 | NTN-SNR Roulements | Roulement à deux rangées concentriques de corps roulants |
| FR3022310A1 (fr) * | 2014-06-11 | 2015-12-18 | Ntn Snr Roulements | Roulement a deux rangees concentriques de corps roulants et procede de fabrication d'un roulement. |
| CN108368876A (zh) * | 2015-12-21 | 2018-08-03 | 谐波传动系统有限公司 | 交叉滚子轴承 |
| US10309453B2 (en) * | 2015-12-21 | 2019-06-04 | Harmonic Drive Systems Inc. | Crossed roller bearing |
| EP3396184A4 (en) * | 2015-12-21 | 2019-07-24 | Harmonic Drive Systems Inc. | Crossed roller bearing |
| CN108368876B (zh) * | 2015-12-21 | 2019-07-30 | 谐波传动系统有限公司 | 交叉滚子轴承 |
| TWI697631B (zh) * | 2015-12-21 | 2020-07-01 | 日商和諧驅動系統股份有限公司 | 交叉滾柱軸承 |
| CN107676388A (zh) * | 2017-11-24 | 2018-02-09 | 北京明正维元电机技术有限公司 | 一种高速复合滚子轴承双滚道圈体 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103534495A (zh) | 2014-01-22 |
| TWI545272B (zh) | 2016-08-11 |
| CN103534495B (zh) | 2016-04-20 |
| JPWO2012157021A1 (ja) | 2014-07-31 |
| TW201248031A (en) | 2012-12-01 |
| KR20140024008A (ko) | 2014-02-27 |
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