JP2010096196A - Rocking bearing - Google Patents

Rocking bearing Download PDF

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Publication number
JP2010096196A
JP2010096196A JP2008265100A JP2008265100A JP2010096196A JP 2010096196 A JP2010096196 A JP 2010096196A JP 2008265100 A JP2008265100 A JP 2008265100A JP 2008265100 A JP2008265100 A JP 2008265100A JP 2010096196 A JP2010096196 A JP 2010096196A
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Prior art keywords
cage
rocking
raceway
notch
circumferential direction
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JP2008265100A
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JP5161026B2 (en
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Shinichiro Miki
慎一郎 三木
Sadatsune Kazama
貞経 風間
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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    • 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
    • F16C19/50—Other types of ball or roller bearings
    • F16C19/502—Other types of ball or roller bearings with rolling elements in rows not forming a full circle
    • 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
    • F16C33/46—Cages for rollers or 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
    • 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
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/20—Application independent of particular apparatuses related to type of movement
    • F16C2300/28—Reciprocating movement

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-assemble rocking bearing using an easy-to-machine rocking restricting mechanism for restricting the peripheral rocking of a cage. <P>SOLUTION: Flanges 21 are provided at both cross ends of a circular rolling surface 13 of a bearing ring 10 while extending in the peripheral direction, and cutout portions 22 are formed in the flanges 21. Protruded portions 23 are provided on the side faces of the circular cage 11 which holds rollers 12 capable of rolling along the rolling surface 13 of the bearing ring 10. The protruded portions 23 are arranged in the cutout portions 22. The protruded portions 23 abut on both peripheral ends of the cutout portions to restrict the rocking of the cage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、斜板式の可変容量型プランジャポンプや斜板式の油圧モータに組込まれたスワッシュプレート等の揺動部品を揺動自在に支持する揺動軸受に関するものである。   The present invention relates to a rocking bearing that swingably supports a rocking component such as a swash plate type variable displacement plunger pump or a swash plate incorporated in a swash plate type hydraulic motor.

一般に、斜板式のプランジャポンプにおいては、図７に示すように、ハウジング１に形成された凹形の円弧状面２とスワッシュプレート３に形成された凸形の円弧状面４間に揺動軸受Ｂ１を組込んでスワッシュプレート３を揺動自在に支持し、そのスワッシュプレート３の揺動により平坦なプランジャ案内面５の傾きを調整することにより、シリンダバレル６のシリンダ７内に挿入されたプランジャ８のストローク量を調整して、吐出量の調整を行うようにしている。 In general, in a swash plate type plunger pump, as shown in FIG. 7, a rocking bearing is provided between a concave arcuate surface 2 formed on the housing 1 and a convex arcuate surface 4 formed on the swash plate 3. The swash plate 3 is swingably supported by incorporating B 1, and the inclination of the flat plunger guide surface 5 is adjusted by swinging the swash plate 3, thereby inserting the swash plate 3 into the cylinder 7 of the cylinder barrel 6. The amount of discharge is adjusted by adjusting the stroke amount of the plunger 8.

ここで、揺動軸受Ｂ１として、ハウジング１の円弧状面２に対向配置された円弧状の軌道輪４０と、その軌道輪４０の内側に組込まれた円弧状の保持器４１と、その保持器４１に形成されたポケット４２内に収容されて軌道輪４０の内周に形成された円弧状の転走面４３に沿って転動可能なローラ４４とからなるものが用いられる。 Here, as the oscillating bearing B 1 , an arc-shaped bearing ring 40 disposed opposite to the arc-shaped surface 2 of the housing 1, an arc-shaped cage 41 incorporated inside the bearing ring 40, and its holding What consists of the roller 44 which is accommodated in the pocket 42 formed in the container 41, and can roll along the circular arc-shaped rolling surface 43 formed in the inner periphery of the track ring 40 is used.

ところで、上記揺動軸受Ｂ１をハウジング１の円弧状面２とスワッシュプレート３の円弧状面４間に単に組込むと、プランジャ案内面５の傾き調整やプランジャポンプの作動時の振動等によって揺動軸受Ｂ１の全体、あるいは、保持器４１が周方向にずれ動いてスワッシュプレート３を安定よく支持することができなくなり、ときには、周方向に抜け出してスワッシュプレート３を支持することができなくなる。 Incidentally, swing by the the rocking bearing B 1 simply incorporated between arcuate surfaces 4 of the arcuate surface 2 and the swash plate 3 of the housing 1, the vibration or the like during operation of the tilt adjustment and a plunger pump plunger guide surface 5 The entire bearing B 1 or the retainer 41 is displaced in the circumferential direction and cannot stably support the swash plate 3. In some cases, the swash plate 3 cannot be supported by slipping out in the circumferential direction.

そのような不都合を解消するため、特許文献１に記載された揺動軸受においては、同図で示すように、軌道輪４０の周方向両端部に一対のＬ形の位置決め片４５を外向きに設け、その位置決め片４５をハウジング１の平坦面９に形成された位置決め孔４６に係合して軌道輪４０を周方向に位置決めしている。   In order to eliminate such inconvenience, in the rocking bearing described in Patent Document 1, as shown in the figure, a pair of L-shaped positioning pieces 45 are provided outward at both circumferential ends of the race ring 40. The positioning piece 45 is engaged with a positioning hole 46 formed in the flat surface 9 of the housing 1 to position the track ring 40 in the circumferential direction.

また、軌道輪４０の周方向両端部に一対のＬ形の抜止め片４７を内向きに設け、その抜止め片４７によって保持器４１が軌道輪４０とスワッシュプレート３の対向部間から周方向に抜け落ちるのを防止している。   In addition, a pair of L-shaped retaining pieces 47 are provided inwardly at both circumferential ends of the bearing ring 40, and the retaining pieces 47 allow the retainer 41 to circumferentially extend from between the facing portions of the bearing ring 40 and the swash plate 3. To prevent falling out.

特開２００２-２８６０４１号公報JP 2002-286041 A

ところで、上記従来の揺動軸受Ｂ１のように、軌道輪４０の周方向両端部に形成した一対のＬ形の抜止め片４７により保持器４１を抜止めする構成であると、軌道輪４０が削り出しからなる場合に、削り出しのみでは抜止め片４７を形成することはできず、切削加工後に切断加工や曲げ加工を行なって抜止め片４７を形成する必要が生じ、加工工程が多くなって加工コストが高くつくという問題が生じる。 By the way, as in the conventional rocking bearing B 1 , when the cage 41 is secured by a pair of L-shaped retaining pieces 47 formed at both ends in the circumferential direction of the bearing ring 40, the bearing ring 40. , The retaining piece 47 cannot be formed only by machining, and it is necessary to form the retaining piece 47 by cutting or bending after the cutting process. This causes a problem that the processing cost is high.

このため、軌道輪４０が削り出しの揺動軸受においては、専ら、特許文献１の図５に示すように、ハウジングの側面とスワッシュプレートの側面間に振れ止めアームを設け、その振れ止めアームの一部を保持器の一側部に形成された切欠部に挿入して保持器の周方向へのずれ動き量を規制するようにしている。この場合、部品点数が多くなって組付けに手間がかかるという問題がある。   For this reason, in a rocking bearing in which the race ring 40 is machined, as shown in FIG. 5 of Patent Document 1, a steady arm is provided between the side surface of the housing and the side surface of the swash plate. A part of the cage is inserted into a notch formed on one side of the cage to regulate the amount of movement of the cage in the circumferential direction. In this case, there is a problem that the number of parts increases and it takes time to assemble.

この発明の課題は、加工の容易な揺動量制限機構でもって保持器の周方向の揺動量を規制することができるようにした組付けの容易な揺動軸受を提供することである。   An object of the present invention is to provide a rocking bearing that can be easily assembled so that the rocking amount in the circumferential direction of the cage can be regulated by a rocking amount limiting mechanism that is easy to process.

上記の課題を解決するため、第１の発明においては、支持部材に形成された凹形の円弧状面と揺動部材に設けられた凸形の円弧状面の対向面間に組込まれる円弧状の軌道輪と、その軌道輪の内周に形成された円弧状の転走面に対向配置された円弧状の保持器と、その保持器のポケットに収容されて前記揺動部材を揺動自在に支持するローラとからなり、前記軌道輪と保持器の相互間に、その保持器の周方向への揺動量を規制する揺動量制限機構を設けた揺動軸受において、前記揺動量制限機構が、前記軌道輪における転走面の幅方向の少なくとも一端部に周方向に延びるフランジを設け、そのフランジに切欠部を形成し、前記保持器には前記フランジと対向する側面に前記切欠部内に配置され、前記切欠部の周方向両端に対する当接によって保持器の揺動量を制限する突出部を設けた構成を採用したのである。   In order to solve the above problems, in the first aspect of the invention, an arcuate shape incorporated between opposing surfaces of a concave arcuate surface formed on the support member and a convex arcuate surface provided on the swing member. Bearing ring, an arc-shaped cage disposed opposite to the arc-shaped rolling surface formed on the inner periphery of the race ring, and the swing member accommodated in the pocket of the cage can swing freely. The swing amount limiting mechanism includes a swing amount limiting mechanism that restricts the swing amount of the retainer in the circumferential direction between the raceway ring and the retainer. A flange extending in the circumferential direction is provided at least at one end of the raceway in the width direction of the raceway, a notch is formed in the flange, and the cage is disposed in the notch on the side facing the flange. By contact with both circumferential ends of the notch Than is adopted the structure in which a projecting portion that limits the amount of swing lifting device.

ここで、切欠部を有するフランジは、軌道輪における転走面の幅方向一端部のみに設けてもよく、あるいは、上記転走面の幅方向両端部に設けるようにしてもよい。転走面の幅方向両端部に一対のフランジを設けると、揺動部材の傾き調整による保持器の周方向への移動時に、その一対のフランジによって保持器の周方向への移動を案内することができるため、保持器が周方向に傾いてローラがスキューするという不都合の発生はなく、揺動部材をスムーズに傾き調整することができる。   Here, the flanges having the notches may be provided only at one end in the width direction of the rolling surface of the race, or may be provided at both ends in the width direction of the rolling surface. If a pair of flanges are provided at both ends in the width direction of the rolling surface, the pair of flanges guide the movement of the cage in the circumferential direction when the cage is moved in the circumferential direction by adjusting the inclination of the swinging member. Therefore, there is no inconvenience that the cage is inclined in the circumferential direction and the roller is skewed, and the swinging member can be smoothly adjusted in inclination.

転走面の幅方向一端部にのみフランジを設ける場合においても、上記転走面の幅方向他端部と保持器の他側面間に、保持器の周方向への揺動を案内する案内手段を設けることにより、その案内手段による保持器他側面の案内とフランジによる保持器一側面の案内とにより、保持器が周方向に傾くのを防止することができる。このため、ローラがスキューするようなことはなく、揺動部材をスムーズに傾き調整することができる。   Even when a flange is provided only at one end in the width direction of the rolling surface, guide means for guiding the circumferential swing of the cage between the other end in the width direction of the rolling surface and the other side surface of the cage. By providing the guide, it is possible to prevent the cage from being inclined in the circumferential direction by the guidance of the other side of the cage by the guide means and the guidance of one side of the cage by the flange. For this reason, the roller is not skewed, and the swinging member can be smoothly adjusted for inclination.

案内手段として、軌道輪の他側面に、その他側面に平行な案内面を内周に有する角形の切欠きを設け、上記保持器の他側面には上記切欠き内に配置されて案内面により接触案内される案内突起を設けた構成からなるものを採用することができる。   As a guide means, a rectangular notch having an inner circumference with a guide surface parallel to the other side surface is provided on the other side surface of the race, and the other side surface of the cage is disposed in the notch and is in contact with the guide surface. It is possible to employ a configuration having a guide projection to be guided.

上記の課題を解決するため、第２の発明においては、保持器の揺動量を制限する揺動量制限機構として、軌道輪における転走面の幅方向の少なくとも一端部と上記保持器の少なくとも一方の側面とのいずれか一方に一対の突起を周方向に間隔をおいて設け、他方にその一対の突起間に配置される突出部を形成し、上記一対の突起に対する突出部の周方向両端の当接によって保持器の揺動量を制限する構成からなるものを採用したのである。   In order to solve the above problems, in the second invention, as a swing amount limiting mechanism for limiting the swing amount of the cage, at least one end portion of the raceway in the width direction of the raceway and at least one of the cage A pair of protrusions is provided on one of the side surfaces with a gap in the circumferential direction, and the other is formed with a protrusion disposed between the pair of protrusions. A structure that limits the swinging amount of the cage by contact is adopted.

上記のように、第１の発明においては、軌道輪における転走面の幅方向の少なくとも一端部にフランジを形成し、そのフランジに切欠部を設け、保持器にはその切欠部内に余裕を持って配置される突出部を形成したので、上記切欠部の周方向両端に対する突出部の当接により、保持器の揺動量を制限することができる。   As described above, in the first invention, a flange is formed on at least one end of the raceway in the width direction of the raceway, a notch is provided in the flange, and the cage has a margin in the notch. Therefore, the amount of rocking of the cage can be limited by the contact of the protrusions with the circumferential ends of the cutouts.

また、フランジや切欠部は切削により形成することができるため、削り出しからなる軌道輪の場合でも、揺動量制限機構を簡単に付加することができ、しかも、フランジの加工を行なう際に切欠部も同時に加工することができるため、加工工数が増えることがなく、コストの安い軌道輪を得ることができる。   In addition, since the flange and the notch can be formed by cutting, a swing amount limiting mechanism can be easily added even in the case of a raceway ring that is cut out, and the notch is used when processing the flange. Can be processed at the same time, so that the number of processing steps is not increased, and a low-cost bearing ring can be obtained.

さらに、軌道輪の転走面に保持器を対向し、その保持器を上記転走面に重ね合わせることにより、突出部が切欠部に嵌り込むため、揺動軸受を簡単に組立てることができる。   Furthermore, since the protrusion is fitted into the notch portion by facing the cage to the rolling surface of the bearing ring and superimposing the cage on the rolling surface, the rocking bearing can be easily assembled.

第２の発明においては、軌道輪の転走面と保持器の側面における一方に一対の突起を設け、他方にその一対の突起間に余裕を持って配置される突出部を設けたことにより、一対の突起に対する突出部の周方向両端の当接により保持器の揺動量を制限することができる。   In the second invention, by providing a pair of protrusions on one of the rolling surface of the raceway and the side surface of the cage, and providing a protrusion on the other side with a margin between the pair of protrusions, The amount of rocking of the cage can be limited by the contact of both ends in the circumferential direction of the protrusion with respect to the pair of protrusions.

また、一対の突起や突出部は切削により形成することができるため、削り出しからなる軌道輪の場合でも、揺動量制限機構を簡単に付加することができ、しかも、転走面の切削加工の際に突起あるいは突出部を加工することができるため、加工工数が増えることがなく、コストの安い軌道輪を得ることができる。   In addition, since the pair of protrusions and protrusions can be formed by cutting, a swing amount limiting mechanism can be easily added even in the case of a raceway formed by cutting, and the rolling surface can be cut. At this time, since the protrusions or protrusions can be processed, the number of processing steps is not increased, and a low-cost bearing ring can be obtained.

さらに、軌道輪の転走面に保持器を対向し、その保持器を上記転走面に重ね合わせることにより、一対の突起間に突出部が嵌り込むため、揺動軸受を簡単に組立てることができる。   Furthermore, since the protrusion is fitted between the pair of protrusions by facing the cage to the rolling surface of the raceway and superimposing the cage on the rolling surface, the swing bearing can be easily assembled. it can.

以下、この発明の実施の形態を図１乃至図６に基づいて説明する。図１は、図７に示す斜板式プランジャポンプの支持部材としてのハウジング１に形成された凹形の円弧状面２と揺動部材としてのスワッシュプレート３に形成された凸形の円弧状面４間にこの発明に係る揺動軸受Ｂ０を組込んで、スワッシュプレート３を揺動自在に支持した例を示す。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a concave arcuate surface 2 formed on a housing 1 as a support member of the swash plate plunger pump shown in FIG. 7 and a convex arcuate surface 4 formed on a swash plate 3 as a swing member. incorporate rocking bearing B 0 according to the present invention between, an example that supports the swash plate 3 swingably.

図１乃至図３に示すように、揺動軸受Ｂ０は、軌道輪１０、保持器１１およびローラ１２からなる。ここで、軌道輪１０は削り出しよって形成されたものであってもよく、ＳＣＭやＳＰＣＣ等を素材とする鋼板のプレス成形品からなるものであってもよい。実施の形態では、削り出しにより形成された軌道輪１０が示されている。 As shown in FIGS. 1 to 3, the rocking bearing B 0 includes a raceway ring 10, a cage 11 and a roller 12. Here, the race 10 may be formed by cutting, or may be a press-formed product of a steel plate made of SCM, SPCC or the like. In the embodiment, a race 10 formed by cutting is shown.

上記軌道輪１０は、ハウジング１の円弧状面２に沿う円弧状とされ、その内周には円弧状の転走面１３が形成されている。この軌道輪１０は、その外周面に設けられたピン１４とハウジング１の円弧状面２に形成されたピン孔１５の係合による手段等を介してハウジング１に対して周方向に位置決めされる。   The track ring 10 has an arc shape along the arc-shaped surface 2 of the housing 1, and an arc-shaped rolling surface 13 is formed on the inner periphery thereof. The race 10 is positioned in the circumferential direction with respect to the housing 1 by means of engagement between a pin 14 provided on the outer peripheral surface of the race 10 and a pin hole 15 formed in the arcuate surface 2 of the housing 1. .

保持器１１は、軌道輪１０の円弧状の転走面１３に沿う円弧状とされている。この保持器１１は周方向に間隔をおいて形成された複数のポケット１６を有し、各ポケット１６内にローラ１２が収容されている。   The cage 11 has an arc shape along the arc-shaped rolling surface 13 of the race 10. The cage 11 has a plurality of pockets 16 formed at intervals in the circumferential direction, and a roller 12 is accommodated in each pocket 16.

軌道輪１０と保持器１１の相互間には、保持器１１の揺動量を制限する揺動量制限機構２０が設けられている。図１および図３に示すように、揺動量制限機構２０は、軌道輪１０における転走面１３の幅方向の両端部に周方向に延びる一対のフランジ２１を形成し、その各フランジ２１に切欠部２２を設け、一方、保持器１１の幅方向両端の両側面には上記切欠部２２のそれぞれ内部に余裕をもって配置される突出部２３を形成した構成としている。   A swing amount limiting mechanism 20 that limits the swing amount of the cage 11 is provided between the raceway ring 10 and the cage 11. As shown in FIGS. 1 and 3, the swing amount limiting mechanism 20 forms a pair of flanges 21 extending in the circumferential direction at both ends in the width direction of the rolling surface 13 of the raceway ring 10, and notches are formed in the flanges 21. On the other hand, the both sides of the cage 11 in the width direction are provided with protruding portions 23 that are arranged with a margin inside each of the cutout portions 22.

上記のように、軌道輪１０の転走面１３の両端部に一対のフランジ２１を形成し、各フランジ２１に切欠部２２を設け、保持器１１には切欠部２２のそれぞれ内部に余裕を持って配置される突出部２３を形成することにより、上記切欠部２２の周方向両端に対する突出部２３の周方向両端の端面の当接によって保持器１１の揺動量を制限することができる。   As described above, a pair of flanges 21 are formed at both ends of the rolling surface 13 of the race 10, the notches 22 are provided in each flange 21, and the retainer 11 has a margin inside each notch 22. By forming the protrusions 23 arranged in this manner, the swing amount of the retainer 11 can be limited by the contact of the end faces of the protrusions 23 with respect to the circumferential ends of the notch 22.

ここで、フランジ２１や切欠部２２は切削により形成することができるため、削り出しからなる軌道輪１0に対して揺動量制限機構２０を簡単に付加することができ、しかも、フランジ２１の加工を行なう際に切欠部２２も同時に加工することができるため、加工工数が増えることがなく、コストの安い軌道輪１０を得ることができる。   Here, since the flange 21 and the notch portion 22 can be formed by cutting, the swing amount limiting mechanism 20 can be easily added to the raceway ring 10 formed by cutting, and the processing of the flange 21 can be performed. Since the notch 22 can be processed at the same time, the number of processing steps is not increased, and the low-cost track ring 10 can be obtained.

また、軌道輪１０の転走面１３に保持器１１を対向し、その保持器１１を上記転走面１３に重ね合わせることにより、突出部２３が切欠部２２に嵌り込み、揺動軸受Ｂ０を簡単に組立てることができる。 Further, the retainer 11 is opposed to the rolling surface 13 of the race 10 and the retainer 11 is overlapped with the rolling surface 13 so that the protruding portion 23 fits into the notch portion 22 and the swing bearing B 0. Can be assembled easily.

保持器１１の揺動時、その保持器１１の両側面は一対のフランジ２１の内側面に接触案内される。このため、保持器１１が周方向に傾いてローラ１２がスキューするのを防止することができる。   When the cage 11 swings, both side surfaces of the cage 11 are contacted and guided to the inner surfaces of the pair of flanges 21. For this reason, it is possible to prevent the cage 11 from being inclined in the circumferential direction and the roller 12 from being skewed.

ここで、保持器１１の両側面の内周部に軌道輪１０の一対のフランジ２１のそれぞれと径方向で対向する薄肉の円弧状壁１７を一体に設け、その円弧状壁１７の外周面と保持器１１の側面とに跨るようにして突出部２３を設けることにより、突出部２３の強度を高めることができ、突出部２３の破損防止に効果を挙げることができる。   Here, a thin arc-shaped wall 17 that is radially opposed to each of the pair of flanges 21 of the bearing ring 10 is integrally provided on the inner peripheral portion of both side surfaces of the cage 11, and the outer peripheral surface of the arc-shaped wall 17 is By providing the protrusion 23 so as to straddle the side surface of the cage 11, the strength of the protrusion 23 can be increased, and an effect can be obtained in preventing the protrusion 23 from being damaged.

図１および図３においては、軌道輪１０の転走面１３の幅方向両端に形成した一対のフランジ２１の周方向長さの中央部に切欠部２２を設けたが、図４（Ｉ）および（II）に示すように、一対のフランジ２１の周方向長さの両端部に切欠部２２を形成し、保持器１１の側面には複数の切欠部２２のそれぞれ内部に配置される突出部２３を設けるようにしてもよい。   1 and 3, the notch 22 is provided at the center of the circumferential length of the pair of flanges 21 formed at both ends in the width direction of the rolling surface 13 of the raceway ring 10. As shown in (II), the notches 22 are formed at both ends of the circumferential length of the pair of flanges 21, and the protrusions 23 disposed inside the plurality of notches 22 on the side surfaces of the retainer 11. May be provided.

上記のように、切欠部２２および突出部２３を複数とすることにより、切欠部２２の端面に対する突出部２３の当接時の衝突力を分散させることができるため、突出部２３の破損防止に効果を挙げることができる。   As described above, by providing a plurality of notches 22 and protrusions 23, it is possible to disperse the collision force when the protrusions 23 come into contact with the end surfaces of the notches 22, thereby preventing damage to the protrusions 23. An effect can be given.

また、図１および図３においては、軌道輪１０の転走面１３の幅方向両端に一対のフランジ２１を設けたが、図５（Ｉ）および（II）に示すように、上記転走面１３の幅方向の一端部にフランジ２１を設けるようにしてもよい。   In FIGS. 1 and 3, a pair of flanges 21 are provided at both ends in the width direction of the rolling surface 13 of the bearing ring 10, but as shown in FIGS. 5 (I) and (II), the rolling surface described above is provided. You may make it provide the flange 21 in the one end part of 13 width directions.

この場合、上記転走面１３の幅方向他端部と保持器１１の他側部面間に、保持器１１の周方向への揺動を案内する案内手段３０を設け、その案内手段３０による保持器１１の他側面の案内とフランジ２１による保持器１１の一側面の案内とにより、保持器１１が周方向にスムーズに揺動し得るようにするのがよい。   In this case, a guide means 30 for guiding the swinging of the cage 11 in the circumferential direction is provided between the other widthwise end of the rolling surface 13 and the other side surface of the cage 11. It is preferable that the retainer 11 can swing smoothly in the circumferential direction by guiding the other side of the retainer 11 and guiding the one side of the retainer 11 by the flange 21.

案内手段３０として、ここでは、軌道輪１０の他側面に、その他側面に平行する案内面３２を内周に有する角形の切欠き３１を設け、保持器１１の他側面には上記切欠き３１内に配置されて案内面３２に接触案内される案内突起３３を設けている。   Here, as the guide means 30, a rectangular notch 31 having a guide surface 32 parallel to the other side surface on the inner periphery is provided on the other side surface of the race ring 10, and the other side surface of the cage 11 is provided in the notch 31. The guide projection 33 is provided so as to contact and guide the guide surface 32.

上記のように、転走面１３の幅方向他端部と保持器１１の他側部面間に案内手段３０を設けることにより、その案内手段３０とフランジ２１とで保持器１１の両側部を案内することができるため、保持器１１の揺動時に、その保持器１１が周方向に傾いてローラ１２がスキューするのを防止することができるため、スワッシュプレート３をスムーズに傾き調整することができる。   As described above, the guide means 30 is provided between the other widthwise end of the rolling surface 13 and the other side surface of the cage 11, so that both sides of the cage 11 are connected by the guide means 30 and the flange 21. Since the guide can be guided and the cage 11 can be prevented from tilting in the circumferential direction and the roller 12 being skewed when the cage 11 is swung, the swash plate 3 can be smoothly tilted. it can.

図６（Ｉ）および（II）は、揺動量制限機構２０の他の例を示す。この例においては、保持器１１の両側面に一対の突起２５を設け、軌道輪１０の転走面１３には、その一対の突起２５間に余裕を持って配置される突出部２６を設け、上記一対の突起２５に対する突出部２６の周方向両端の当接により保持器１１の揺動量を制限するようにしている。   6 (I) and (II) show another example of the swing amount limiting mechanism 20. In this example, a pair of protrusions 25 are provided on both side surfaces of the cage 11, and the rolling surface 13 of the bearing ring 10 is provided with a protruding portion 26 disposed with a margin between the pair of protrusions 25, The amount of swinging of the cage 11 is limited by the contact of both ends in the circumferential direction of the protrusion 26 with the pair of protrusions 25.

なお、軌道輪１０の転走面１３に一対の突起を設け、保持器１１に突出部を形成するようにしてもよい。   In addition, a pair of protrusions may be provided on the rolling surface 13 of the race 10, and a protrusion may be formed on the cage 11.

上記の構成からなる揺動量制限機構２０においても、一対の突起２５や突出部２６は切削により形成することができるため、削り出しからなる軌道輪１０の場合でも、揺動量制限機構２０を簡単に付加することができる。しかも、転走面１３の切削加工の際に突起２５あるいは突出部２６を加工することができるため、加工工数が増えることがなく、コストの安い軌道輪１０を得ることができる。   Even in the rocking amount limiting mechanism 20 having the above-described configuration, the pair of protrusions 25 and the protruding portions 26 can be formed by cutting. Therefore, even in the case of the raceway ring 10 formed by cutting, the rocking amount limiting mechanism 20 can be easily used. Can be added. In addition, since the protrusion 25 or the protruding portion 26 can be processed when the rolling surface 13 is cut, the number of processing steps does not increase and the low-cost bearing ring 10 can be obtained.

また、軌道輪１０の転走面１３に保持器１１を対向し、その保持器１１を上記転走面１３に重ね合わせることにより、一対の突起２５間に突出部２６が嵌り込むため、揺動軸受Ｂ０を簡単に組立てることができる。 Further, since the retainer 11 is opposed to the rolling surface 13 of the bearing ring 10 and the retainer 11 is overlapped with the rolling surface 13, the protruding portion 26 is fitted between the pair of protrusions 25. it can be assembled bearing B 0 easy.

この発明に係る揺動軸受をプランジャポンプに組込んだ状態の断面図Sectional drawing of the state which built the rocking bearing which concerns on this invention in the plunger pump 図１のII−II線に沿った断面図Sectional view along the line II-II in FIG. 軌道輪と保持器とを示す分解斜視図Exploded perspective view showing bearing ring and cage （Ｉ）は、揺動量制限機構の他の例を示す断面図、（II）は、（Ｉ）に示す軌道輪と保持器の分解斜視図(I) is sectional drawing which shows the other example of a rocking | fluctuation amount restriction | limiting mechanism, (II) is an exploded perspective view of the bearing ring and cage shown in (I) （Ｉ）は、この発明に係る揺動軸受の他の例を示す断面図、（II）は、（Ｉ）に示す軌道輪と保持器の分解斜視図(I) is sectional drawing which shows the other example of the rocking | fluctuation bearing which concerns on this invention, (II) is an exploded perspective view of the bearing ring and cage shown in (I) （Ｉ）は、揺動量制限機構の他の例を示す断面図、（II）は、（Ｉ）に示す軌道輪と保持器の分解斜視図(I) is sectional drawing which shows the other example of a rocking | fluctuation amount restriction | limiting mechanism, (II) is an exploded perspective view of the bearing ring and cage shown in (I) 従来の揺動軸受が組込まれた斜板式プランジャポンプを示す断面図Sectional view showing a swash plate plunger pump incorporating a conventional rocking bearing

符号の説明Explanation of symbols

１ ハウジング（支持部材）
２ 円弧状面
３ スワッシュプレート（揺動部材）
４ 円弧状面
１０ 軌道輪
１１ 保持器
１２ ローラ
１３ 転走面
１６ ポケット
２０ 揺動量制限機構
２１ フランジ
２２ 切欠部
２３ 突出部
２５ 突起
２６ 突出部
３０ 案内手段
３１ 切欠き
３２ 案内面
３３ 案内突起 1 Housing (supporting member)
2 Arc surface 3 Swash plate (oscillating member)
4 Arc-shaped surface 10 Track ring 11 Cage 12 Roller 13 Rolling surface 16 Pocket 20 Oscillation amount limiting mechanism 21 Flange 22 Notch 23 Projection 25 Projection 26 Projection 30 Guide means 31 Notch 32 Guide surface 33 Guide projection

Claims (5)

支持部材に形成された凹形の円弧状面と揺動部材に設けられた凸形の円弧状面の対向面間に組込まれる円弧状の軌道輪と、その軌道輪の内周に形成された円弧状の転走面に対向配置された円弧状の保持器と、その保持器のポケットに収容されて前記揺動部材を揺動自在に支持するローラとからなり、前記軌道輪と保持器の相互間に、その保持器の周方向への揺動量を規制する揺動量制限機構を設けた揺動軸受において、
前記揺動量制限機構が、前記軌道輪における転走面の幅方向の少なくとも一端部に周方向に延びるフランジを設け、そのフランジに切欠部を形成し、前記保持器には前記フランジと対向する側面に前記切欠部内に配置される突出部を設け、前記切欠部の周方向両端に対する突出部の当接によって保持器の揺動量を制限する構成からなることを特徴とする揺動軸受。 An arc-shaped raceway that is built between the concave arcuate surface formed on the support member and the convex arcuate surface provided on the rocking member, and an inner periphery of the raceway. An arc-shaped cage disposed opposite to the arc-shaped rolling surface, and a roller that is accommodated in a pocket of the cage and supports the rocking member in a swingable manner. In a rocking bearing provided with a rocking amount limiting mechanism for regulating the rocking amount in the circumferential direction of the cage between them,
The swing amount limiting mechanism is provided with a flange extending in the circumferential direction at least at one end in the width direction of the rolling surface of the raceway, a notch is formed in the flange, and a side surface of the cage facing the flange A swing bearing having a structure in which a protrusion disposed in the notch is provided, and the swing amount of the cage is limited by contact of the protrusion with both ends of the notch in the circumferential direction. 前記軌道輪における転走面の幅方向両端部に周方向に延びる一対のフランジを設け、各フランジに切欠部を形成し、前記保持器には前記フランジのそれぞれと対向する両側面のそれぞれに前記各切欠部のそれぞれ内部に配置される突出部を設けた請求項１に記載の揺動軸受。   A pair of flanges extending in the circumferential direction are provided at both ends of the raceway in the width direction of the raceway, a notch is formed in each flange, and the cage is provided with each of both side surfaces facing each of the flanges. The rocking bearing according to claim 1, wherein a protrusion is provided inside each notch. 前記軌道輪における転走面の幅方向一端部に周方向に延びるフランジを設け、そのフランジに切欠部を形成し、前記保持器には前記フランジと対向する一側面に前記切欠部に挿入される突出部を設け、前記転走面の幅方向他端部と保持器の他側面間に、保持器の周方向への揺動を案内する案内手段を設けた請求項１に記載の揺動軸受。   A flange extending in the circumferential direction is provided at one end of the raceway in the width direction of the raceway, a notch is formed in the flange, and the cage is inserted into the notch on one side facing the flange. 2. A rocking bearing according to claim 1, wherein a protrusion is provided, and a guide means for guiding rocking of the cage in the circumferential direction is provided between the other end in the width direction of the rolling surface and the other side of the cage. . 前記案内手段が、前記軌道輪の他側面に、その他側面に平行する案内面を内周に有する角形の切欠きを設け、前記保持器の他側面には前記切欠き内に配置されて前記案内面に案内される案内突起を設けた構成からなる請求項３に記載の揺動軸受。   The guide means is provided on the other side of the raceway with a rectangular notch having a guide surface parallel to the other side on the inner periphery, and the guide is disposed on the other side of the cage in the notch. The rocking bearing according to claim 3, comprising a guide protrusion that is guided by the surface. 支持部材に形成された凹形の円弧状面と揺動部材に設けられた凸形の円弧状面の対向面間に組込まれる円弧状の軌道輪と、その軌道輪の内周に形成された円弧状の転走面に対向配置された円弧状の保持器と、その保持器のポケットに収容されて前記揺動部材を揺動自在に支持するローラとからなり、前記軌道輪と保持器の相互間に、その保持器の周方向への揺動量を規制する揺動量制限機構を設けた揺動軸受において、
前記揺動量制限機構が、前記軌道輪における転走面の幅方向の少なくとも一端部と前記保持器の少なくとも一方の側面とのいずれか一方に一対の突起を周方向に間隔をおいて設け、他方にその一対の突起間に配置される突出部を形成し、前記一対の突起に対する突出部の周方向両端の当接によって保持器の揺動量を制限する構成からなることを特徴とする揺動軸受。 An arc-shaped raceway that is built between the concave arcuate surface formed on the support member and the convex arcuate surface provided on the rocking member, and an inner periphery of the raceway. An arc-shaped cage disposed opposite to the arc-shaped rolling surface, and a roller that is accommodated in a pocket of the cage and supports the rocking member in a swingable manner. In a rocking bearing provided with a rocking amount limiting mechanism for regulating the rocking amount in the circumferential direction of the cage between them,
The swing amount limiting mechanism is provided with a pair of protrusions spaced apart in the circumferential direction on at least one end of the raceway in the width direction of the rolling surface and at least one side of the cage, and the other A swing bearing having a configuration in which a protrusion disposed between the pair of protrusions is formed, and the swing amount of the cage is limited by contact of both ends of the protrusion with respect to the pair of protrusions in the circumferential direction. .
JP2008265100A 2008-10-14 2008-10-14 Swing bearing Expired - Fee Related JP5161026B2 (en)

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DE102012103017A1 (en) * 2012-04-05 2013-10-10 Bpw Bergische Achsen Kg Bearing a part cylindrical outer surface having rotary lever against a pressure piece
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