JPH06221276A - Pump integrated bearing - Google Patents

Pump integrated bearing

Info

Publication number
JPH06221276A
JPH06221276A JP3432093A JP3432093A JPH06221276A JP H06221276 A JPH06221276 A JP H06221276A JP 3432093 A JP3432093 A JP 3432093A JP 3432093 A JP3432093 A JP 3432093A JP H06221276 A JPH06221276 A JP H06221276A
Authority
JP
Japan
Prior art keywords
bearing
retainer
pump
annular space
pump housing
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.)
Granted
Application number
JP3432093A
Other languages
Japanese (ja)
Other versions
JP3272087B2 (en
Inventor
Teiji Katogi
貞次 加藤木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
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 NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP03432093A priority Critical patent/JP3272087B2/en
Publication of JPH06221276A publication Critical patent/JPH06221276A/en
Application granted granted Critical
Publication of JP3272087B2 publication Critical patent/JP3272087B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PURPOSE:To reduce the total length and weight of a bearing and make the bearing in a compact size by integrating a pump element with a bearing element. CONSTITUTION:A pump housing 6 is assembled to an outer ring 2 of a roller bearing 1. A pump housing 6 rotatably supports a retainer 5 round the eccentric position P to the shaft center O of inner and outer rings 1, 2 by integrally formed annular projections 11. An annular space 13 is formed in such a manner that the radial width is gradually decreased toward the eccentric side of the retainer 5 among both side annular projections 11, 11 of the pump housing, the inner periphery of an outer ring 2 and the outer periphery of the retainer 5. An intake port 8 and a discharge port 9 opened to the annular space 13 are provided on the pump housing. The retainer 5 retains the respective rolling elements 4, and plural vanes 16 are supported thereon in such a manner as to freely move in the radial direction. The retainer 5 rotates with the rotation of the inner ring 2, and functions as a rotor for rotating the vanes 16, so that the partitioned spaces between the vanes 16 in the annular space 13 change in capacity to produce pump action.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、トランスミッション
やエンジンの潤滑用および制御用オイルポンプ、あるい
は一般産業用オイルポンプ等として使用されるポンプ一
体化ベアリングに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump-integrated bearing used as an oil pump for lubricating and controlling a transmission or an engine, or an oil pump for general industry.

【0002】[0002]

【従来の技術】従来、オートマチックトランスミッショ
ンでは、図4に示すように主軸51の端部近傍をケース
52の軸受53で支持し、軸端をオイルポンプ54に接
続している。オイルポンプ54は、トランスミッション
の潤滑油供給や、制御用油圧の供給に利用されるもので
あり、ギヤポンプ、トロコイドポンプ、あるいはベーン
ポンプ形式のものが使用される。軸受53には円筒ころ
軸受、ニードル軸受、玉軸受、滑り軸受等が使用され
る。一般産業用ポンプにおいても、前記と同様に主軸の
端部近傍を軸受で支え、軸端にポンプを接続する構造が
採られる。
2. Description of the Related Art Conventionally, in an automatic transmission, as shown in FIG. 4, the vicinity of an end of a main shaft 51 is supported by a bearing 53 of a case 52, and the shaft end is connected to an oil pump 54. The oil pump 54 is used for supplying lubricating oil for the transmission and supplying hydraulic pressure for control, and a gear pump, a trochoid pump, or a vane pump type is used. As the bearing 53, a cylindrical roller bearing, a needle bearing, a ball bearing, a slide bearing or the like is used. Also in the general industrial pump, similarly to the above, the structure in which the vicinity of the end of the main shaft is supported by the bearing and the pump is connected to the shaft end is adopted.

【0003】[0003]

【発明が解決しようとする課題】しかし、いずれも軸受
53とポンプ54との2つの独立した要素部品が必要で
あり、また軸受53とポンプ54とが主軸51の軸方向
に直列に配置されるため、全長が長くなってしまうとい
う問題点がある。
However, both require two independent component parts of the bearing 53 and the pump 54, and the bearing 53 and the pump 54 are arranged in series in the axial direction of the main shaft 51. Therefore, there is a problem that the total length becomes long.

【0004】この発明の目的は、ポンプ要素と軸受要素
とが一体化できて、全長の短縮化、コンパクト化、およ
び軽量化が図れるポンプ一体化ベアリングを提供するこ
とである。
An object of the present invention is to provide a pump-integrated bearing in which the pump element and the bearing element can be integrated, and the overall length can be shortened, compacted, and lightened.

【0005】[0005]

【課題を解決するための手段】この発明のポンプ一体化
ベアリングは、転がり軸受の外輪にポンプハウジングを
組付けて構成される。ポンプハウジングは、保持器を内
外輪の軸心に対する偏心位置回りに回転自在に支持する
と共に、外輪と保持器との間に所定軸方向幅の環状空間
を形成する。このポンプハウジングに前記環状空間に開
通する吸入口および吐出口を設ける。保持器の周方向複
数箇所には、前記環状空間を周方向に仕切るベーンを半
径方向移動自在に設ける。
The pump-integrated bearing of the present invention is constructed by assembling the pump housing to the outer ring of the rolling bearing. The pump housing rotatably supports the retainer about an eccentric position with respect to the axial center of the inner and outer races, and forms an annular space having a predetermined axial width between the outer race and the retainer. The pump housing is provided with a suction port and a discharge port which open to the annular space. Vanes for partitioning the annular space in the circumferential direction are provided at a plurality of circumferential positions of the cage so as to be movable in the radial direction.

【0006】[0006]

【作用】この構成によると、いわゆる非平衡型ベーンポ
ンプのロータとして転がり軸受の保持器が機能し、ポン
プ作用が得られる。すなわち、内輪が回転すると、保持
器はころを介して伝わる回転力により、内輪と静止状態
の外輪との中間速度で回転する。保持器は、回転角度に
かかわらず、内外輪の軸心に対して偏心した位置にあ
り、保持器外周と外輪内周との間の環状空間は径方向幅
が円周方向に沿って次第に変化した楔状空間となってい
る。また、保持器に設けられた各ベーンは、保持器の回
転に伴う遠心力で常に外輪の内径面に押し当てられた状
態となり、前記環状空間を周方向に仕切る。そのため、
内輪の回転に伴う保持器の回転により、環状空間の各ベ
ーンで仕切られた空間が容積変化し、流体を吸入口から
環状空間に吸入して吐出口から吐出するポンプ作用を生
じる。また、このポンプ一体化ベアリングは、内外輪が
同軸で、両者の間の転動体も同軸で公転するため、転が
り軸受としての機能も得られる。
According to this structure, the cage of the rolling bearing functions as the rotor of the so-called non-equilibrium vane pump, and the pump action is obtained. That is, when the inner ring rotates, the cage rotates at an intermediate speed between the inner ring and the stationary outer ring due to the rotational force transmitted through the rollers. The cage is eccentric to the axis of the inner and outer rings regardless of the rotation angle, and the radial width of the annular space between the outer circumference of the cage and the inner circumference of the outer ring gradually changes along the circumferential direction. It is a wedge-shaped space. Further, each vane provided in the retainer is in a state of being constantly pressed against the inner diameter surface of the outer ring by the centrifugal force generated by the rotation of the retainer, and partitions the annular space in the circumferential direction. for that reason,
Due to the rotation of the cage due to the rotation of the inner ring, the volume of the space partitioned by the vanes of the annular space changes, and a pump action is generated to suck the fluid into the annular space from the suction port and discharge the fluid from the discharge port. In addition, the pump-integrated bearing has a function as a rolling bearing because the inner and outer rings are coaxial and the rolling elements between them are also revolving coaxially.

【0007】[0007]

【実施例】この発明の一実施例を図1ないし図3に基づ
いて説明する。このポンプ一体化ベアリングは、転がり
軸受1にポンプハウジング6を組付けて構成される。転
がり軸受1は深溝玉軸受からなり、内輪2と外輪3との
間に、転動体4を保持した保持器5が介在している。シ
ャフト7は内輪2に嵌合し、スプラインまたはキー等
(図示せず)で回転方向に係止される。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. This pump-integrated bearing is constructed by assembling the pump housing 6 to the rolling bearing 1. The rolling bearing 1 is a deep groove ball bearing, and a cage 5 holding a rolling element 4 is interposed between an inner ring 2 and an outer ring 3. The shaft 7 is fitted to the inner ring 2 and is locked in the rotational direction by a spline, a key or the like (not shown).

【0008】保持器5は、周方向複数箇所に転動体4を
収容するポケット12を形成すると共に、各ポケット1
2間にベーン16を半径方向移動自在に嵌合するベーン
ガイド孔17を設けたリング状のものであり、断面形状
は内径側部分が幅広となったT字形に形成されている。
保持器5は、図2に示すように軸方向に垂直な分割面b
で2分割し、両分割保持器5A,5Bは、周方向複数箇
所に一体形成した圧入突部18を結合溝19に圧入させ
て互いに結合してある。突部18および溝19の代わり
に、ボルト・ナットで結合しても良い。保持器5を2分
割したのは軸受の組み立て上の理由からである。なお、
図2は保持器5の斜視図であるが、ポケット12および
ベーンガイド孔17は各々1個のみを示し、他のポケッ
ト等は図示を省略してある。保持器5の幅狭部分5aの
幅Wは、ベーン16の幅と略一致させてある。各ベーン
16は、転動体4の直径よりも若干幅広とし、その先端
形状は外輪3の転走溝3aの断面形状に一致させてあ
る。転動体4は、図1(B)に示した例では5個とした
が、軸受能力に合う本数とする。
The cage 5 has pockets 12 for accommodating the rolling elements 4 formed at a plurality of circumferential positions, and each pocket 1
It is a ring-shaped member having a vane guide hole 17 into which a vane 16 is movably fitted in a radial direction, and has a T-shaped cross section with a widened inner diameter side portion.
As shown in FIG. 2, the cage 5 has a split surface b perpendicular to the axial direction.
The two divided cages 5A and 5B are joined together by press-fitting the press-fitting projections 18 integrally formed at a plurality of circumferential positions in the coupling groove 19. Instead of the protrusion 18 and the groove 19, bolts and nuts may be used for connection. The reason why the cage 5 is divided into two is for the reason of assembling the bearing. In addition,
Although FIG. 2 is a perspective view of the cage 5, only one pocket 12 and one vane guide hole 17 are shown, and other pockets and the like are omitted. The width W of the narrow portion 5a of the cage 5 is set to be substantially equal to the width of the vane 16. Each vane 16 is made slightly wider than the diameter of the rolling element 4, and its tip shape is made to match the cross-sectional shape of the rolling groove 3 a of the outer ring 3. Although the number of rolling elements 4 is five in the example shown in FIG. 1B, the number of rolling elements 4 is set to match the bearing capacity.

【0009】図1(A)において、ポンプハウジング6
は、軸方向に垂直な分割面aで2個の分割ハウジング6
A,6Bに分割され、互いにボルト・ナット等の締付け
具、圧入突部と溝との係合、または接着剤、溶接等によ
り接合される。外輪3は、片方の分割ハウジング6Aに
設けられた外周壁部分10に、圧入状態または隙間を介
して嵌合している。各分割ハウジング6A,6Bは、外
輪1の内周面の両側縁に嵌合する環状突部11を有し、
これら環状突部11,11の内径面に保持器5の両側の
幅広部分5bの外面が回転自在に嵌合している。環状突
部11は、内径面の中心P(図1(B))が内輪2およ
び外輪3の軸心である軸受中心Oに対して所定の偏心量
eだけ偏心しており、したがって保持器5は前記の偏心
した中心Pの回りに回転自在となっている。
In FIG. 1A, the pump housing 6
Is the two split housings 6 on the split surface a perpendicular to the axial direction.
It is divided into A and 6B, and they are joined to each other by a fastening tool such as a bolt and a nut, engagement of a press-fitting protrusion and a groove, or an adhesive or welding. The outer ring 3 is fitted in the outer peripheral wall portion 10 provided on one of the split housings 6A in a press-fitted state or with a gap. Each of the split housings 6A and 6B has an annular protrusion 11 that is fitted to both side edges of the inner peripheral surface of the outer ring 1,
The outer surfaces of the wide portions 5b on both sides of the cage 5 are rotatably fitted to the inner diameter surfaces of the annular projections 11, 11. The annular protrusion 11 has a center P (FIG. 1 (B)) of the inner diameter surface eccentric with respect to a bearing center O, which is the axis of the inner ring 2 and the outer ring 3, by a predetermined eccentric amount e, and thus the cage 5 is It is rotatable about the eccentric center P.

【0010】両分割ハウジング6A,6Bの環状突部1
1の高さは、先端面が保持器5の幅狭部分5aの側面お
よびベーン16の端面に略接する高さに形成され、両分
割ハウジング6A,6Bの取付調整により、ベーン16
と環状突部11との間の軸方向隙間が適量に調整され
る。したがって、両側の環状突部11,11と、外輪2
の内径面と、保持器5の幅狭部分5aの外径面との間
に、閉鎖状態の環状空間13(図1(B))が形成され
る。
Annular projection 1 of both split housings 6A, 6B
The height of the vane 16 is such that the tip end surface is substantially in contact with the side surface of the narrow portion 5a of the cage 5 and the end surface of the vane 16.
The axial gap between the ring-shaped protrusion 11 and the annular protrusion 11 is adjusted to an appropriate amount. Therefore, the annular projections 11 on both sides and the outer ring 2
A closed annular space 13 (FIG. 1 (B)) is formed between the inner diameter surface of the outer peripheral surface of the retainer 5 and the outer diameter surface of the narrow portion 5a of the retainer 5.

【0011】環状空間13は、保持器5の偏心により、
円周方向に漸次狭まった楔状の空間となり、かつ各ベー
ン16で円周方向に仕切られている。この環状空間13
に対して吸入口8と吐出口9とが、片方の分割ハウジン
グ6Aに環状突部11を貫通して形成されている。吸入
口8と吐出口9とは、各々環状突部11の略半周にわた
る円弧状のスリットに形成され(図3)、かつスリット
幅が環状突部11の内径面の偏心側に漸次狭くなるよう
に形成されている。
Due to the eccentricity of the cage 5, the annular space 13 is
It becomes a wedge-shaped space that is gradually narrowed in the circumferential direction, and is partitioned in the circumferential direction by each vane 16. This annular space 13
On the other hand, the suction port 8 and the discharge port 9 are formed in one of the split housings 6A so as to penetrate the annular projection 11. The suction port 8 and the discharge port 9 are each formed in an arcuate slit extending over substantially a half circumference of the annular projection 11 (FIG. 3), and the slit width is gradually narrowed toward the eccentric side of the inner diameter surface of the annular projection 11. Is formed in.

【0012】この構成によると、次のように非平衡型の
ベーンポンプとして動作する。すなわち、シャフト7が
回転し、シャフト7と一体の内輪2が回転すると、保持
器5は転動体4を介して伝わる回転力により、内輪2と
静止状態の外輪3との中間速度で回転する。保持器5
は、回転角度にかかわらず、内外輪2,3の軸心Oに対
して偏心した位置にあり、保持器5と外輪2との間の環
状空間13は径方向幅が円周方向に次第に変化する楔状
空間となっている。また、保持器5に設けられた各ベー
ン16は、保持器5の回転に伴う遠心力で常に外輪3の
内径面に押し当てられた状態となり、環状空間13を周
方向に仕切る。そのため、内輪2の回転に伴う保持器5
の回転により、環状空間13の各ベーンで仕切られた空
間が容積変化し、ポンプ作用を生じる。すなわち、吸入
口8から吸入されたオイル等の流体が環状空間13を経
て吐出口9から吐出される。
According to this structure, it operates as a non-equilibrium vane pump as follows. That is, when the shaft 7 rotates and the inner ring 2 integral with the shaft 7 rotates, the cage 5 rotates at an intermediate speed between the inner ring 2 and the stationary outer ring 3 by the rotational force transmitted through the rolling elements 4. Cage 5
Is eccentric with respect to the axis O of the inner and outer races 2 and 3 regardless of the rotation angle, and the annular space 13 between the cage 5 and the outer race 2 has a radial width that gradually changes in the circumferential direction. It is a wedge-shaped space. Further, each vane 16 provided in the retainer 5 is always pressed against the inner diameter surface of the outer ring 3 by the centrifugal force caused by the rotation of the retainer 5, and partitions the annular space 13 in the circumferential direction. Therefore, the cage 5 accompanying the rotation of the inner ring 2
Due to the rotation, the volume of the space partitioned by each vane of the annular space 13 changes, and a pumping action occurs. That is, the fluid such as oil sucked from the suction port 8 is discharged from the discharge port 9 through the annular space 13.

【0013】吐出量は次式のようになる。 D=4πRbe−ntbe−n′Ve ここで、D;1回転当たりの吐出量 R;外輪の転走溝平均深さにおける半径 b;ベーン軸方向幅 e;偏心量 n;ベーン数 t;ベーン厚さ n′;転動体数 V;転動体容積The discharge amount is given by the following equation. D = 4πRbe-ntbe-n'Ve Here, D: discharge amount per revolution R; radius at outer groove rolling groove average depth b; vane axial width e; eccentricity n; vane number t; vane thickness N ': number of rolling elements V: rolling element volume

【0014】また、このポンプ一体化ベアリングは、内
外輪2,3が同軸であり、両者の間の転動体4も同軸で
公転するため、通常の転がり軸受としても機能する。こ
のポンプ一体化ベアリングは、このようにポンプ機能お
よび軸受機能が得られ、これをトランスミッションや、
エンジンのポンプ、あるいは一般用ポンプとして使う場
合に、軸受とポンプとの一体化により、全長が短縮化さ
れる。また、ポンプハウジング6が軸受のハウジングを
兼用し、かつ保持器5がベーン16を回転させるロータ
を兼用することになり、全体がコンパクト化されて軽量
化される。
In this pump-integrated bearing, the inner and outer rings 2 and 3 are coaxial, and the rolling element 4 between them also revolves coaxially, so that it also functions as a normal rolling bearing. In this pump integrated bearing, the pump function and the bearing function are obtained in this way,
When used as an engine pump or a general-purpose pump, the total length is shortened by integrating the bearing and the pump. Further, the pump housing 6 also serves as a bearing housing, and the retainer 5 also serves as a rotor for rotating the vanes 16, so that the whole is made compact and lightweight.

【0015】なお、前記実施例は転がり軸受1が深溝玉
軸受である場合につき説明したが、転がり軸受1には円
筒ころ軸受や円すいころ軸受等、各種の転がり軸受が使
用できる。円筒ころ軸受を使用する場合は、ベーン16
の外径端は外輪の内径面に沿う直線形状のものとでき
る。
In the above embodiment, the rolling bearing 1 is a deep groove ball bearing, but various rolling bearings such as a cylindrical roller bearing and a tapered roller bearing can be used as the rolling bearing 1. If using cylindrical roller bearings, vane 16
The outer diameter end of can be a linear shape along the inner diameter surface of the outer ring.

【0016】[0016]

【発明の効果】この発明のポンプ一体化ベアリングは、
転がり軸受の外輪にポンプハウジングを組付け、このポ
ンプハウジングにより保持器を偏心位置で回転自在に支
持して外輪と保持器との間に半径方向幅が次第に変化す
る環状空間を形成し、かつ前記保持器にベーンを取付け
たものであるため、内輪の回転に伴う保持器の回転でベ
ーンが公転し、ポンプ作用が得られる。そのため、ポン
プ要素と軸受要素とが一体化された装置となり、軸受お
よびポンプを独立して設けたものに比べて、全長が短
く、コンパクトな構成で、軽量化が可能なものとなる。
The pump integrated bearing of the present invention is
A pump housing is attached to the outer ring of the rolling bearing, the pump housing rotatably supports the retainer at an eccentric position to form an annular space between the outer ring and the retainer, the radial width of which gradually changes, and Since the cage is provided with the vane, the vane revolves when the cage rotates due to the rotation of the inner ring, and a pump action is obtained. Therefore, the device has a pump element and a bearing element integrated with each other, and has a shorter overall length, a compact structure, and a lighter weight as compared with a device in which a bearing and a pump are provided independently.

【図面の簡単な説明】[Brief description of drawings]

【図1】(A)はこの発明の一実施例の破断側面図、
(B)は同図(A)のB−B線断面図である。
FIG. 1A is a cutaway side view of an embodiment of the present invention,
(B) is a sectional view taken along the line BB of FIG.

【図2】保持器の概略斜視図である。FIG. 2 is a schematic perspective view of a cage.

【図3】図1(A)のC−C線断面において、環状突部
のみを示した断面図である。
FIG. 3 is a cross-sectional view showing only an annular protrusion in a cross section taken along the line CC of FIG.

【図4】従来例の破断側面図である。FIG. 4 is a cutaway side view of a conventional example.

【符号の説明】[Explanation of symbols]

1…転がり軸受、2…内輪、3…外輪、4…転動体、5
…保持器、6…ポンプハウジング、6A,6B…分割ハ
ウジング、7…シャフト、8…吸入口、9…吐出口、1
3…環状空間、16…ベーン
1 ... Rolling bearing, 2 ... Inner ring, 3 ... Outer ring, 4 ... Rolling element, 5
... Retainer, 6 ... Pump housing, 6A, 6B ... Split housing, 7 ... Shaft, 8 ... Suction port, 9 ... Discharge port, 1
3 ... annular space, 16 ... vane

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 転がり軸受の外輪に組付けられて保持器
を内外輪の軸心に対する偏心位置回りに回転自在に支持
すると共に、外輪と保持器との間に所定軸方向幅の環状
空間を形成するポンプハウジングを設け、このポンプハ
ウジングに前記環状空間に開通する吸入口および吐出口
を設け、前記保持器の周方向複数箇所に、前記環状空間
を周方向に仕切るベーンを半径方向移動自在に設けたポ
ンプ一体化ベアリング。
1. A rolling bearing mounted on an outer ring of the rolling bearing to rotatably support a retainer around an eccentric position with respect to an axial center of the inner and outer rings, and an annular space having a predetermined axial width between the outer ring and the retainer. A pump housing to be formed is provided, and an intake port and a discharge port that open to the annular space are provided in the pump housing, and vanes that partition the annular space in the circumferential direction are radially movable at a plurality of circumferential positions of the cage. Built-in pump bearing.
JP03432093A 1993-01-29 1993-01-29 Pump integrated bearing Expired - Fee Related JP3272087B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03432093A JP3272087B2 (en) 1993-01-29 1993-01-29 Pump integrated bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03432093A JP3272087B2 (en) 1993-01-29 1993-01-29 Pump integrated bearing

Publications (2)

Publication Number Publication Date
JPH06221276A true JPH06221276A (en) 1994-08-09
JP3272087B2 JP3272087B2 (en) 2002-04-08

Family

ID=12410876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03432093A Expired - Fee Related JP3272087B2 (en) 1993-01-29 1993-01-29 Pump integrated bearing

Country Status (1)

Country Link
JP (1) JP3272087B2 (en)

Also Published As

Publication number Publication date
JP3272087B2 (en) 2002-04-08

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