JPH1113640A - Oil pump structure - Google Patents

Oil pump structure

Info

Publication number
JPH1113640A
JPH1113640A JP16242097A JP16242097A JPH1113640A JP H1113640 A JPH1113640 A JP H1113640A JP 16242097 A JP16242097 A JP 16242097A JP 16242097 A JP16242097 A JP 16242097A JP H1113640 A JPH1113640 A JP H1113640A
Authority
JP
Japan
Prior art keywords
oil pump
internal
rotation
pump structure
inner rotor
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.)
Pending
Application number
JP16242097A
Other languages
Japanese (ja)
Inventor
Takao Koyama
隆夫 小山
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP16242097A priority Critical patent/JPH1113640A/en
Publication of JPH1113640A publication Critical patent/JPH1113640A/en
Pending legal-status Critical Current

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  • Rotary Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To decrease the generation of a moment due to offset in the axial direction of a contact point between the internal part rotary member of an oil pump and the rotation drive member thereof and improve durability of an internal rotation member and a bush for the internal rotation member. SOLUTION: An oil pump structure is formed such that a protrusion part 2a formed in the peripheral symmetrical position of the sleeve 2 of the torque converter is inserted in a key groove formed in the peripheral direction- symmetrical position of the inner rotor of an oil pump. In this case, a circular arc is formed in the two end faces in the rotation direction of the protrusion part 2a of the sleeve 2 and offset in the axial direction of a contact point between two members occurring during decentering of the central axes of an inner rotor and the sleeve.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、自動変速機のオイ
ルポンプの内部回転部材と回転駆動部材とを駆動結合し
て成るオイルポンプ構造に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump structure in which an internal rotary member and a rotary drive member of an oil pump of an automatic transmission are drive-coupled.

【0002】[0002]

【従来の技術】オイルポンプの内部回転部材と流体伝動
装置の回転駆動部材とを駆動結合して成るオイルポンプ
構造の従来例(以下、第1従来例という。特開平1−1
82660号参照)としては、例えば、オイルポンプの
内部回転部材であるインナーロータの周方向対称位置に
一対の突出部を形成し、これら突出部をトルクコンバー
タの回転駆動部材であるスリーブの周方向対称位置に形
成した一対のキー溝に夫々挿入し、スリーブの内周部に
ブッシュを嵌合して成るものがある。この第1従来例の
オイルポンプ構造は、1つの兼用ブッシュでトルクコン
バータの圧力およびオイルポンプのインナーロータの圧
力を受ける構造になっているため、比較的低圧のオイル
ポンプを用いる自動変速機ユニットに適用することがで
きる。
2. Description of the Related Art A conventional example of an oil pump structure in which an internal rotating member of an oil pump and a rotary driving member of a fluid transmission device are drive-coupled (hereinafter referred to as a first conventional example).
No. 82660), for example, a pair of protrusions are formed at circumferentially symmetric positions of an inner rotor which is an internal rotating member of an oil pump, and these protrusions are circumferentially symmetrical of a sleeve which is a rotation driving member of the torque converter. There is a type in which a bush is fitted into a pair of key grooves formed at respective positions, and a bush is fitted to the inner peripheral portion of the sleeve. The oil pump structure of the first conventional example has a structure in which the pressure of the torque converter and the pressure of the inner rotor of the oil pump are received by one shared bush, so that the automatic transmission unit using a relatively low-pressure oil pump can be used. Can be applied.

【0003】ところで、この第1従来例では、比較的高
圧のオイルポンプを用いる自動変速機ユニット(CVT
等)に適用しようとすると、オイルポンプのインナーロ
ータの圧力が大きくなるためインナーロータ側にもブッ
シュを圧入せざるを得ず、必然的に2つの専用ブッシュ
を用いることになるが、上記構造では突出部を有するイ
ンナーロータ内周部にブッシュを圧入することは困難で
ある。
In this first conventional example, an automatic transmission unit (CVT) using a relatively high-pressure oil pump is used.
And so on), the pressure of the inner rotor of the oil pump increases, so the bush must be pressed into the inner rotor side, and two dedicated bushes are inevitably used. It is difficult to press-fit the bush into the inner peripheral portion of the inner rotor having the protrusion.

【0004】そこで、比較的高圧のオイルポンプを用い
る自動変速機ユニットに適用する場合には、例えば、イ
ンナーロータの周方向対称位置に一対のキー溝を形成
し、これらキー溝内に、トルクコンバータのスリーブの
周方向対称位置に形成した一対の突出部を夫々挿入し、
スリーブを外周部のブッシュにより支持するとともに、
インナーロータの内周部にブッシュを圧入して成るオイ
ルポンプ構造(以下、第2従来例という)が用いられ
る。この第2従来例のオイルポンプ構造は、2つの専用
ブッシュでトルクコンバータの圧力およびインナーロー
タの圧力を夫々独立して受ける構造であるため、CVT
等の比較的高圧のオイルポンプを用いる自動変速機ユニ
ットに適用することができる。
Therefore, when applied to an automatic transmission unit using a relatively high-pressure oil pump, for example, a pair of key grooves are formed at circumferentially symmetric positions of an inner rotor, and a torque converter is formed in these key grooves. Insert a pair of protrusions formed at circumferentially symmetric positions of the sleeve of
While supporting the sleeve with the bush on the outer periphery,
An oil pump structure (hereinafter, referred to as a second conventional example) formed by press-fitting a bush into the inner peripheral portion of the inner rotor is used. The oil pump structure of the second conventional example is a structure in which the pressure of the torque converter and the pressure of the inner rotor are independently received by the two dedicated bushes.
For example, an automatic transmission unit using a relatively high-pressure oil pump.

【0005】[0005]

【発明が解決しようとする課題】上述した第2従来例の
オイルポンプ構造では、インナーロータ中心軸およびス
リーブ中心軸のなす角度が0°の場合には、インナーロ
ータのキー溝およびスリーブの突出部は線接触するが、
後述する図5(b)に示すように、取付誤差や自動変速
機ユニットの変形等によって前記中心軸同士が角度θを
なすように偏心した場合には、キー溝および突出部は2
点で点接触することになる。このとき、接触点のインナ
ーロータ中心軸線方向のオフセット量と、インナーロー
タに加わる半径方向荷重の積で表わされるモーメントが
発生する。
In the oil pump structure of the second conventional example described above, when the angle between the center axis of the inner rotor and the center axis of the sleeve is 0 °, the key groove of the inner rotor and the protrusion of the sleeve are provided. Makes line contact,
As shown in FIG. 5B described later, when the center axes are eccentric so as to form an angle θ due to a mounting error, deformation of the automatic transmission unit, or the like, the keyway and the protruding portion become two.
Point-to-point contact will occur. At this time, a moment represented by the product of the offset amount of the contact point in the center axis direction of the inner rotor and the radial load applied to the inner rotor is generated.

【0006】このモーメントは、インナーギヤブッシュ
に偏荷重が発生し易くなるように作用して、中心軸非偏
心時よりもクサビ圧を減少させてしまう。このクサビ圧
の減少に伴い、クサビ圧とブッシュ面積との積により定
まるインナーギヤブッシュの軸受け耐力が低下するた
め、ブッシュの寿命が低下するとともにインナーロータ
のキー溝内周面の摩耗が増加してしまう。なお、上記第
1従来例のオイルポンプ構造の場合には、第2従来例ほ
ど顕著ではないが、上記不具合は同様に発生する。
This moment acts so that an eccentric load is easily generated in the inner gear bush, and reduces the wedge pressure as compared with the case where the center shaft is not eccentric. As the wedge pressure decreases, the bearing resistance of the inner gear bush, which is determined by the product of the wedge pressure and the bush area, decreases, so that the life of the bush decreases and the inner peripheral surface of the inner groove of the inner rotor increases in wear. I will. In the case of the oil pump structure of the first conventional example, the above-described problem occurs similarly, though not so remarkably as in the second conventional example.

【0007】本発明は、オイルポンプの内部回転部材お
よび回転駆動部材の接触点の軸方向のオフセットに起因
するモーメントを減少させるように構成することによ
り、内部回転部材および内部回転部材用ブッシュの耐久
性を向上させることを目的とする。
[0007] The present invention is designed to reduce the moment caused by the axial offset of the contact point between the internal rotary member and the rotary drive member of the oil pump, thereby improving the durability of the internal rotary member and the bush for the internal rotary member. The purpose is to improve the performance.

【0008】[0008]

【課題を解決するための手段】上記目的のため、本発明
の請求項1の構成は、オイルポンプの内部回転部材と回
転駆動部材とを駆動結合して成るオイルポンプ構造であ
って、前記内部回転部材の周方向対称位置に形成したキ
ー溝に、前記回転駆動部材の周方向対称位置に形成した
突出部を挿入して成るオイルポンプ構造において、前記
回転駆動部材の突出部の回転方向の両端面に円弧を形成
したことを特徴とするものである。
According to the first aspect of the present invention, there is provided an oil pump structure in which an internal rotating member and a rotary driving member of an oil pump are drivingly connected to each other. In an oil pump structure in which a protrusion formed at a circumferentially symmetric position of the rotary drive member is inserted into a key groove formed at a circumferentially symmetric position of the rotary member, both ends in the rotation direction of the protrusion of the rotary drive member An arc is formed on the surface.

【0009】本発明の請求項1においては、オイルポン
プの内部回転部材に駆動結合される回転駆動部材の、周
方向対称位置に形成した突出部の回転方向の両端面に円
弧を形成したため、前記内部回転部材および前記回転駆
動部材の中心軸の偏心時に生じる両部材の接触点の軸方
向のオフセットが減少する。
In the first aspect of the present invention, the circular arc is formed on both end surfaces in the rotational direction of the projecting portions formed at circumferentially symmetric positions of the rotary driving member which is drivingly connected to the internal rotary member of the oil pump. The axial offset of the contact point between the internal rotating member and the rotational drive member, which occurs when the central axes of the rotary driving member are eccentric, is reduced.

【0010】上記目的のため、本発明の請求項2の構成
は、オイルポンプの内部回転部材と回転駆動部材とを駆
動結合して成るオイルポンプ構造であって、前記内部回
転部材の周方向対称位置に形成したキー溝に、前記回転
駆動部材の周方向対称位置に形成した突出部を挿入して
成るオイルポンプ構造において、前記内部回転部材のキ
ー溝の回転方向の両端面に円弧を形成したことを特徴と
するものである。
To achieve the above object, a second aspect of the present invention is an oil pump structure in which an internal rotating member and a rotary driving member of an oil pump are drive-coupled, wherein the internal rotating member has a circumferential symmetry. In the oil pump structure in which the protrusion formed at the circumferentially symmetric position of the rotary driving member is inserted into the key groove formed at the position, arcs are formed at both end surfaces in the rotation direction of the key groove of the internal rotation member. It is characterized by the following.

【0011】本発明の請求項2においては、回転駆動部
材に駆動結合されるオイルポンプの内部回転部材の、周
方向対称位置に形成したキー溝の回転方向の両端面に円
弧を形成したため、前記内部回転部材および前記回転駆
動部材の中心軸の偏心時に生じる両部材の接触点の軸方
向のオフセットが減少する。
According to a second aspect of the present invention, since the inner rotating member of the oil pump which is drivingly coupled to the rotating driving member has circular arcs formed on both end surfaces in the rotating direction of the key grooves formed at circumferentially symmetric positions, the arc is formed. The axial offset of the contact point between the internal rotating member and the rotational drive member, which occurs when the central axes of the rotary driving member are eccentric, is reduced.

【0012】上記目的のため、本発明の請求項3の構成
は、オイルポンプの内部回転部材と回転駆動部材とを駆
動結合して成るオイルポンプ構造であって、前記内部回
転部材の周方向対称位置に形成した突出部を、前記回転
駆動部材の周方向対称位置に形成したキー溝に挿入して
成るオイルポンプ構造において、前記内部回転部材の突
出部の回転方向の両端面に円弧を形成したことを特徴と
するものである。
To achieve the above object, a third aspect of the present invention is an oil pump structure in which an internal rotating member and a rotary driving member of an oil pump are drivingly connected to each other, wherein the internal rotating member is circumferentially symmetric. In the oil pump structure in which the protrusion formed at the position is inserted into the key groove formed at the circumferentially symmetric position of the rotary drive member, arcs are formed at both end surfaces in the rotation direction of the protrusion of the internal rotation member. It is characterized by the following.

【0013】本発明の請求項3においては、回転駆動部
材に駆動結合されるオイルポンプの内部回転部材の、周
方向対称位置に形成した突出部の回転方向の両端面に円
弧を形成したため、前記内部回転部材および前記回転駆
動部材の中心軸の偏心時に生じる両部材の接触点の軸方
向のオフセットが減少する。
According to the third aspect of the present invention, since the internal rotating member of the oil pump which is drivingly connected to the rotary driving member has circular arcs formed on both end surfaces in the rotation direction of the protrusions formed at circumferentially symmetric positions. The axial offset of the contact point between the internal rotating member and the rotational drive member, which occurs when the central axes of the rotary driving member are eccentric, is reduced.

【0014】上記目的のため、本発明の請求項4の構成
は、オイルポンプの内部回転部材と回転駆動部材とを駆
動結合して成るオイルポンプ構造であって、前記内部回
転部材の周方向対称位置に形成した突出部を、前記回転
駆動部材の周方向対称位置に形成したキー溝に挿入して
成るオイルポンプ構造において、前記回転駆動部材のキ
ー溝の回転方向の両端面に円弧を形成したことを特徴と
するものである。
To achieve the above object, a fourth aspect of the present invention is an oil pump structure in which an internal rotating member and a rotary driving member of an oil pump are drivingly connected to each other. In the oil pump structure in which the protrusion formed at the position is inserted into the key groove formed at the circumferentially symmetric position of the rotary drive member, arcs are formed at both end surfaces in the rotation direction of the key groove of the rotary drive member. It is characterized by the following.

【0015】本発明の請求項4においては、オイルポン
プの内部回転部材に駆動結合される回転駆動部材の、周
方向対称位置に形成したキー溝の回転方向の両端面に円
弧を形成したため、前記内部回転部材および前記回転駆
動部材の中心軸の偏心時に生じる両部材の接触点の軸方
向のオフセットが減少する。
According to a fourth aspect of the present invention, a circular arc is formed on both end surfaces in the rotational direction of the key groove formed at circumferentially symmetric positions of the rotary driving member which is drivingly connected to the internal rotary member of the oil pump. The axial offset of the contact point between the internal rotating member and the rotational drive member, which occurs when the central axes of the rotary driving member are eccentric, is reduced.

【0016】[0016]

【発明の効果】本発明の請求項1によれば、回転駆動部
材の突出部の回転方向の両端面に円弧を形成することに
より前記内部回転部材および前記回転駆動部材の接触点
の軸方向のオフセットを減少させたため、該オフセット
に起因するモーメントが減少し、上述したクサビ圧の低
下が抑制される。これにより、オイルポンプの内部回転
部材のブッシュの軸受け耐力が向上し、内部回転部材お
よび内部回転部材用ブッシュの耐久性が向上する。
According to the first aspect of the present invention, by forming circular arcs on both end surfaces in the rotation direction of the protruding portion of the rotary driving member, the contact point between the internal rotary member and the rotary driving member in the axial direction is formed. Since the offset is reduced, the moment due to the offset is reduced, and the above-described decrease in the wedge pressure is suppressed. Thereby, the bearing strength of the bush of the internal rotating member of the oil pump is improved, and the durability of the internal rotating member and the bush for the internal rotating member is improved.

【0017】本発明の請求項2によれば、オイルポンプ
の内部回転部材のキー溝の回転方向の両端面に円弧を形
成することにより前記内部回転部材および前記回転駆動
部材の接触点の軸方向のオフセットを減少させたため、
該オフセットに起因するモーメントが減少し、上述した
クサビ圧の低下が抑制される。これにより、オイルポン
プの内部回転部材のブッシュの軸受け耐力が向上し、内
部回転部材および内部回転部材用ブッシュの耐久性が向
上する。
According to the second aspect of the present invention, an arc is formed on both end surfaces in the rotation direction of the key groove of the internal rotation member of the oil pump, so that the contact point between the internal rotation member and the rotation drive member is formed in the axial direction. Reduced the offset of
The moment due to the offset is reduced, and the above-described decrease in the wedge pressure is suppressed. Thereby, the bearing strength of the bush of the internal rotating member of the oil pump is improved, and the durability of the internal rotating member and the bush for the internal rotating member is improved.

【0018】本発明の請求項3によれば、オイルポンプ
の内部回転部材の突出部の回転方向の両端面に円弧を形
成することにより前記内部回転部材および前記回転駆動
部材の接触点の軸方向のオフセットを減少させたため、
該オフセットに起因するモーメントが減少し、上述した
クサビ圧の低下が抑制される。これにより、オイルポン
プの内部回転部材のブッシュの軸受け耐力が向上し、内
部回転部材および内部回転部材用ブッシュの耐久性が向
上する。
According to the third aspect of the present invention, an arc is formed on both end surfaces in the rotation direction of the projecting portion of the internal rotation member of the oil pump, so that the contact point between the internal rotation member and the rotation drive member is formed in the axial direction. Reduced the offset of
The moment due to the offset is reduced, and the above-described decrease in the wedge pressure is suppressed. Thereby, the bearing strength of the bush of the internal rotating member of the oil pump is improved, and the durability of the internal rotating member and the bush for the internal rotating member is improved.

【0019】本発明の請求項4によれば、回転駆動部材
のキー溝の回転方向の両端面に円弧を形成することによ
り前記内部回転部材および前記回転駆動部材の接触点の
軸方向のオフセットを減少させたため、該オフセットに
起因するモーメントが減少し、上述したクサビ圧の低下
が抑制される。これにより、オイルポンプの内部回転部
材のブッシュの軸受け耐力が向上し、内部回転部材およ
び内部回転部材用ブッシュの耐久性が向上する。
According to the fourth aspect of the present invention, an arc is formed on both end surfaces of the key groove of the rotary drive member in the rotation direction, thereby offsetting the contact point between the internal rotary member and the rotary drive member in the axial direction. Due to the reduction, the moment due to the offset is reduced, and the above-described decrease in the wedge pressure is suppressed. Thereby, the bearing strength of the bush of the internal rotating member of the oil pump is improved, and the durability of the internal rotating member and the bush for the internal rotating member is improved.

【0020】[0020]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき詳細に説明する。図1(a)は本発明の第1実
施形態のオイルポンプ構造を概略的に示す断面図であ
り、図1(b)は(a)のA−A断面図である。本実施
形態のオイルポンプ構造は、図1(a)に示すように、
オイルポンプの内部回転部材であるインナーロータ1の
周方向対称位置に一対のキー溝1aを形成し、これらキ
ー溝1a内に、トルクコンバータの回転駆動部材である
スリーブ2の周方向対称位置に形成した一対の突出部2
aを夫々挿入し、インナーロータ1の内周部にブッシュ
3を圧入するとともに、スリーブ2は外周部のブッシュ
4により支持されている。本実施形態のオイルポンプ構
造は、2つの専用ブッシュ3,4でオイルポンプのイン
ナーギヤの圧力およびトルクコンバータの圧力を夫々独
立して受ける構造であるため、CVT等の比較的高圧の
オイルポンプを用いる自動変速機ユニットに適用するこ
とができる。なお、本実施形態のインナーロータ1の上
記一対のキー溝1aとは90°回転した周方向対称位置
には、一対のアプライ圧油路(図示せず)が形成されて
いる。また、上記インナーロータ1は、本実施形態のオ
イルポンプの全体図である図2に示すように、アウタロ
ータ5を介してオイルポンプハウジング6に支持されて
おり、インナーロータ1、アウタロータ5およびオイル
ポンプハウジング6の図示左端面にはオイルポンプカバ
ー7が装着されている。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a sectional view schematically showing an oil pump structure according to a first embodiment of the present invention, and FIG. 1B is an AA sectional view of FIG. As shown in FIG. 1A, the oil pump structure of the present embodiment
A pair of key grooves 1a are formed at circumferentially symmetric positions of an inner rotor 1, which is an internal rotating member of an oil pump, and are formed in these key grooves 1a at circumferentially symmetric positions of a sleeve 2, which is a rotary drive member of a torque converter. Pair of protrusions 2
The bush 3 is pressed into the inner peripheral portion of the inner rotor 1 while the sleeve 2 is supported by the bush 4 on the outer peripheral portion. The oil pump structure of the present embodiment is a structure in which the two dedicated bushes 3 and 4 independently receive the pressure of the inner gear of the oil pump and the pressure of the torque converter, so that a relatively high-pressure oil pump such as a CVT is used. It can be applied to the automatic transmission unit used. Note that a pair of apply pressure oil passages (not shown) are formed in the inner rotor 1 of the present embodiment at circumferentially symmetric positions rotated by 90 ° with respect to the pair of key grooves 1a. The inner rotor 1 is supported by an oil pump housing 6 via an outer rotor 5, as shown in FIG. 2, which is an overall view of the oil pump of the present embodiment. The inner rotor 1, the outer rotor 5, and the oil pump An oil pump cover 7 is mounted on the left end face of the housing 6 in the figure.

【0021】本実施形態においては、図3の斜視図に示
すように、スリーブ2の周方向対称位置に形成した一対
の突出部2aの回転方向の両端面には、円弧が形成され
ている。この円弧は、図4(a)の詳細図に示すよう
に、所定の曲率Rの円弧を突出部2aの端面の全体に亘
って形成するか、あるいは、図4(b)の詳細図に示す
ように、所定の曲率Rの円弧を突出部2aの端面の両端
部に形成し、円弧同士を直線的に連結して構成する。な
お、図4(a),(b)に示す突出部2aの先端部には
所定のテーパ(例えばC1の面取り)が形成されている
が、このテーパは組付性を向上させるためのものであ
り、本実施形態の円弧とは目的が相違するものである。
In this embodiment, as shown in the perspective view of FIG. 3, a pair of protrusions 2a formed at circumferentially symmetric positions of the sleeve 2 have circular arcs formed on both end surfaces in the rotation direction. As shown in the detailed view of FIG. 4 (a), this circular arc forms an arc of a predetermined curvature R over the entire end face of the protruding portion 2a, or is shown in the detailed view of FIG. 4 (b). As described above, arcs having a predetermined curvature R are formed at both ends of the end face of the protruding portion 2a, and the arcs are linearly connected to each other. A predetermined taper (for example, a chamfer of C1) is formed at the tip of the protruding portion 2a shown in FIGS. 4A and 4B, and this taper is for improving the assemblability. The purpose is different from the arc of the present embodiment.

【0022】次に、本実施形態の作用を従来例の作用と
比較しながら説明する。上述した第2従来例において
は、図10に示すように、インナーロータ51の中心軸
およびスリーブ52の中心軸のなす角度が0°の場合に
は、インナーロータ51のキー溝51aおよびスリーブ
52の突出部52aは図示の如く線接触するが、取付誤
差や自動変速機ユニットの変形等によって図5(b)に
示すように、前記中心軸同士が角度θをなすように偏心
した場合には、キー溝51aおよび突出部52aは2点
(2つの突出部52aの夫々の1点ずつ)で点接触する
ことになる。このときの接触点のインナーロータ中心軸
線方向のオフセット量をL1とし、インナーロータに加
わる半径方向荷重をFとすると、M1 =FL1 で表わさ
れるモーメントM1 が発生する。
Next, the operation of the present embodiment will be described in comparison with the operation of the conventional example. In the above-described second conventional example, as shown in FIG. 10, when the angle between the central axis of the inner rotor 51 and the central axis of the sleeve 52 is 0 °, the keyway 51a of the inner rotor 51 and the sleeve 52 are The protruding portion 52a makes line contact as shown in the figure, but if the center axes are eccentric so as to form an angle θ as shown in FIG. 5 (b) due to a mounting error or deformation of the automatic transmission unit, etc. The key groove 51a and the protrusion 52a come into point contact with each other at two points (each one of the two protrusions 52a). The offset of the inner rotor center axis direction of the contact point of the time as a L 1, when the radial load applied to the inner rotor and F, a moment M 1 is generated represented by M 1 = FL 1.

【0023】このモーメントM1は、インナーギヤブッ
シュに偏荷重が発生し易くなるように作用して、中心軸
非偏心時に発生する図6(a)に示すような所望のクサ
ビ圧を、例えば同図(b)に示すように減少させてしま
う。このクサビ圧の低下に伴い、クサビ圧とブッシュ面
積との積により定まるインナーギヤブッシュの軸受け耐
力がF1 からF2 に低下するため、ブッシュの寿命が低
下するとともにインナーロータの内周面の摩耗が増加し
てしまう。
This moment M 1 acts so that an eccentric load is easily generated in the inner gear bush, and reduces a desired wedge pressure generated when the center shaft is not eccentric as shown in FIG. It is reduced as shown in FIG. With the lowering of the wedge pressure, since the bearing strength of the inner gear bush defined by the product of the wedge pressure and the bushing area is reduced from F 1 to F 2, the wear of the inner peripheral surface of the inner rotor with the life of the bushing is reduced Will increase.

【0024】一方、本実施形態においては、スリーブ2
の突出部2aの回転方向の両端面に円弧を形成したた
め、図5(a)に示すように、インナーロータ1の中心
軸およびスリーブ2の中心軸が角度θををなすように偏
心してキー溝1aおよび突出部2aが2点(2つの突出
部2aの夫々の1点ずつ)で点接触する場合の接触点の
インナーロータ中心軸線方向のオフセット量L2 は上記
第2従来例のL1 よりも小さい値となる。
On the other hand, in this embodiment, the sleeve 2
Since the projections 2a have circular arcs formed at both end surfaces in the rotation direction, the keyway is eccentric so that the center axis of the inner rotor 1 and the center axis of the sleeve 2 form an angle θ as shown in FIG. offset L 2 of the inner rotor center axis direction of the contact point when 1a and the protruding portion 2a is in point contact at two points (one point for each of the two projections 2a) than L 1 of the second conventional example Is also a small value.

【0025】上記のようにオフセット量が減少すると、
発生するモーメントM2 はM2 =FL2 となり、上記第
2従来例のM1 よりも減少する。このモーメントの減少
に伴い、図6(b)の状態に減少していたクサビ圧を、
図6(a)の状態に近付ける方向に回復させることがで
きる。したがって、クサビ圧とブッシュ面積との積によ
り定まるインナーギヤブッシュの軸受け耐力がF1 に近
付く方向に改善されるため、ブッシュの寿命が向上する
とともに、インナーロータ1のキー溝1aの偏当たりが
抑制されてインナーロータキー溝1aの内周面の耐摩耗
性を向上させることができる。
When the offset amount decreases as described above,
Generating moments M 2 to the M 2 = FL 2 becomes reduced than M 1 of the second conventional example. The wedge pressure, which has been reduced to the state shown in FIG.
It can be restored in a direction approaching the state of FIG. Therefore, since the bearing strength of the inner gear bush defined by the product of the wedge pressure and bushing area can be improved toward the F 1, with the life of the bush is increased, the per-polarized keyways 1a of the inner rotor 1 inhibition As a result, the wear resistance of the inner peripheral surface of the inner rotor keyway 1a can be improved.

【0026】図7は本発明の第2実施形態のオイルポン
プ構造を概略的に示す断面図である。本実施形態におい
ては、回転駆動部材であるスリーブ2の突出部2aの回
転方向の両端面に円弧を形成する代わりに、オイルポン
プの内部回転部材であるインナーロータ1のキー溝1a
の回転方向の両端面に円弧を形成するようにしている。
本実施形態は上記第1実施形態の作用効果を得ることが
できる。
FIG. 7 is a sectional view schematically showing an oil pump structure according to a second embodiment of the present invention. In the present embodiment, instead of forming circular arcs on both end surfaces in the rotation direction of the protrusion 2a of the sleeve 2 as the rotary drive member, the key groove 1a of the inner rotor 1 as the internal rotary member of the oil pump is used.
An arc is formed on both end faces in the rotation direction.
This embodiment can obtain the operation and effect of the first embodiment.

【0027】図8(a)は本発明の第3実施形態のオイ
ルポンプ構造を概略的に示す分解斜視図であり、図8
(b),(c),(d)は夫々、オイルポンプの内部回
転部材の詳細図である。本実施形態のオイルポンプ構造
は、図8(a)に示すように、オイルポンプの内部回転
部材11の周方向対称位置に一対の突出部11aを形成
し、これら突出部11aを、トルクコンバータの回転駆
動部材であるスリーブ12の周方向対称位置に形成した
一対のキー溝12aに夫々挿入し、スリーブ12の内周
部に図示しないブッシュを嵌合して成る。本実施形態の
オイルポンプ構造は、1つの兼用ブッシュでトルクコン
バータの圧力およびオイルポンプのインナーロータの圧
力を受ける構造になっているため、比較的低圧のオイル
ポンプを用いる自動変速機ユニットに適用することがで
きる。
FIG. 8A is an exploded perspective view schematically showing an oil pump structure according to a third embodiment of the present invention.
(B), (c), (d) is a detailed view of the internal rotating member of the oil pump, respectively. In the oil pump structure of the present embodiment, as shown in FIG. 8A, a pair of protrusions 11a are formed at circumferentially symmetric positions of the internal rotating member 11 of the oil pump, and these protrusions 11a are connected to the torque converter. The sleeve 12 is inserted into a pair of key grooves 12 a formed at symmetric positions in the circumferential direction of the sleeve 12, which is a rotation driving member, and a bush (not shown) is fitted to an inner peripheral portion of the sleeve 12. The oil pump structure of the present embodiment is configured to receive the pressure of the torque converter and the pressure of the inner rotor of the oil pump with one shared bush, so that it is applied to an automatic transmission unit using a relatively low-pressure oil pump. be able to.

【0028】上記において、オイルポンプの内部回転部
材11は、ベーンポンプに適用する場合には図8(b)
に示すようにインナーロータ11−1として構成し、ギ
アポンプに適用する場合には図8(c)に示すようにイ
ンナーギア11−2として構成し、ピストンポンプに適
用する場合には図8(d)に示すようにカム11−3と
して構成するものとする。
In the above description, when the internal rotating member 11 of the oil pump is applied to a vane pump, FIG.
As shown in FIG. 8 (c), the inner rotor 11-1 is configured as an inner rotor 11-1. When applied to a gear pump, the inner rotor 11-1 is configured as an inner gear 11-2. ), It is configured as a cam 11-3.

【0029】本実施形態においては、図8(a)に示す
ように、内部回転部材11の周方向対称位置に形成した
一対の突出部11aには、回転方向の両端面に円弧が形
成されており、この円弧は、上記第1実施形態と同様
に、図4(a)または図4(b)の詳細図に示すように
構成する。
In the present embodiment, as shown in FIG. 8 (a), a pair of protrusions 11a formed at circumferentially symmetric positions of the internal rotating member 11 have circular arcs formed at both end surfaces in the rotation direction. The arc is configured as shown in the detailed view of FIG. 4A or 4B, as in the first embodiment.

【0030】本実施形態によれば、内部回転部材11の
周方向対称位置に形成した一対の突出部11aの挿入方
向の両端面に円弧を形成することにより、上記第1実施
形態と同様の作用効果が得られる。
According to the present embodiment, arcs are formed at both end surfaces in the insertion direction of the pair of protrusions 11a formed at circumferentially symmetric positions of the internal rotating member 11, thereby providing the same operation as the first embodiment. The effect is obtained.

【0031】図9は本発明の第4実施形態のオイルポン
プ構造を概略的に示す断面図である。本実施形態におい
ては、内部回転部材11の突出部11aの回転方向の両
端面に円弧を形成する代わりに、トルクコンバータの回
転駆動部材であるスリーブ12のキー溝12aの挿入方
向の両端面に円弧を形成するようにしている。本実施形
態は上記第3実施形態の作用効果を得ることができる。
FIG. 9 is a sectional view schematically showing an oil pump structure according to a fourth embodiment of the present invention. In the present embodiment, instead of forming arcs on both end surfaces in the rotation direction of the protrusion 11a of the internal rotation member 11, arcs are formed on both end surfaces in the insertion direction of the key groove 12a of the sleeve 12, which is a rotation drive member of the torque converter. Is formed. This embodiment can obtain the operation and effect of the third embodiment.

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

【図1】(a)は本発明の第1実施形態のオイルポンプ
構造を概略的に示す断面図であり、(b)は(a)のA
−A断面図である。
FIG. 1A is a sectional view schematically showing an oil pump structure according to a first embodiment of the present invention, and FIG. 1B is a sectional view of A in FIG.
It is -A sectional drawing.

【図2】第1実施形態のオイルポンプの全体図である。FIG. 2 is an overall view of an oil pump according to the first embodiment.

【図3】第1実施形態のトルクコンバータのスリーブの
斜視図である。
FIG. 3 is a perspective view of a sleeve of the torque converter according to the first embodiment.

【図4】(a)、(b)は夫々、第1実施形態のスリー
ブの突出部に形成する円弧の詳細図である。
FIGS. 4A and 4B are detailed views of a circular arc formed on a protrusion of the sleeve of the first embodiment, respectively.

【図5】(a)は本発明の第1実施形態における中心軸
偏心時のキー溝および突出部の接触点のインナーロータ
中心軸線方向のオフセット量を示す図であり、(b)は
従来例における中心軸偏心時のキー溝および突出部の接
触点のインナーロータ中心軸線方向のオフセット量を示
す図である。
FIG. 5A is a diagram showing an offset amount of a contact point between a keyway and a protrusion in the center axis direction of the inner rotor when the center axis is eccentric according to the first embodiment of the present invention, and FIG. FIG. 9 is a diagram showing an offset amount of a contact point between a keyway and a protrusion in the center axis direction of the inner rotor when the center axis is decentered in FIG.

【図6】(a)は本発明の第1実施形態の作用を説明す
るためのクサビ圧特性図であり、(b)は従来例の作用
を説明するためのクサビ圧特性図である。
FIG. 6A is a wedge pressure characteristic diagram for explaining an operation of the first embodiment of the present invention, and FIG. 6B is a wedge pressure characteristic diagram for explaining an operation of a conventional example.

【図7】本発明の第2実施形態のオイルポンプ構造を概
略的に示す断面図である。
FIG. 7 is a sectional view schematically showing an oil pump structure according to a second embodiment of the present invention.

【図8】(a)は本発明の第3実施形態のオイルポンプ
構造を概略的に示す分解斜視図であり、(b),
(c),(d)は夫々、オイルポンプの内部回転部材の
詳細図である。
FIG. 8A is an exploded perspective view schematically showing an oil pump structure according to a third embodiment of the present invention.
(C), (d) is a detailed view of the internal rotating member of the oil pump, respectively.

【図9】本発明の第4実施形態のオイルポンプ構造を概
略的に示す断面図である。
FIG. 9 is a sectional view schematically showing an oil pump structure according to a fourth embodiment of the present invention.

【図10】従来例の作用を説明するための図である。FIG. 10 is a diagram for explaining the operation of the conventional example.

【符号の説明】[Explanation of symbols]

1 内部回転部材(インナーロータ) 1a キー溝 2 回転駆動部材(スリーブ) 2a 突出部 11 内部回転部材 11a 突出部 12 回転駆動部材(スリーブ) 12a キー溝 DESCRIPTION OF SYMBOLS 1 Internal rotation member (inner rotor) 1a Keyway 2 Rotation drive member (sleeve) 2a Projection 11 Internal rotation member 11a Projection 12 Rotation drive member (sleeve) 12a Keyway

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 オイルポンプの内部回転部材と回転駆動
部材とを駆動結合して成るオイルポンプ構造であって、
前記内部回転部材の周方向対称位置に形成したキー溝
に、前記回転駆動部材の周方向対称位置に形成した突出
部を挿入して成るオイルポンプ構造において、 前記回転駆動部材の突出部の回転方向の両端面に円弧を
形成したことを特徴とするオイルポンプ構造。
1. An oil pump structure comprising a drive connection between an internal rotation member and a rotation drive member of an oil pump,
In an oil pump structure, a protrusion formed at a circumferentially symmetric position of the rotary drive member is inserted into a key groove formed at a circumferentially symmetric position of the internal rotary member. An oil pump structure wherein arcs are formed on both end faces of the oil pump.
【請求項2】 オイルポンプの内部回転部材と回転駆動
部材とを駆動結合して成るオイルポンプ構造であって、
前記内部回転部材の周方向対称位置に形成したキー溝
に、前記回転駆動部材の周方向対称位置に形成した突出
部を挿入して成るオイルポンプ構造において、 前記内部回転部材のキー溝の回転方向の両端面に円弧を
形成したことを特徴とするオイルポンプ構造。
2. An oil pump structure in which an internal rotation member and a rotation drive member of an oil pump are drive-coupled,
In an oil pump structure, a protrusion formed at a circumferentially symmetric position of the rotation driving member is inserted into a key groove formed at a circumferentially symmetric position of the internal rotation member. An oil pump structure wherein arcs are formed on both end faces of the oil pump.
【請求項3】 オイルポンプの内部回転部材と回転駆動
部材とを駆動結合して成るオイルポンプ構造であって、
前記内部回転部材の周方向対称位置に形成した突出部
を、前記回転駆動部材の周方向対称位置に形成したキー
溝に挿入して成るオイルポンプ構造において、 前記内部回転部材の突出部の回転方向の両端面に円弧を
形成したことを特徴とするオイルポンプ構造。
3. An oil pump structure in which an internal rotation member and a rotation drive member of an oil pump are drive-coupled,
In an oil pump structure, a protrusion formed at a circumferentially symmetric position of the internal rotating member is inserted into a key groove formed at a circumferentially symmetric position of the rotation driving member. An oil pump structure wherein arcs are formed on both end faces of the oil pump.
【請求項4】 オイルポンプの内部回転部材と回転駆動
部材とを駆動結合して成るオイルポンプ構造であって、
前記内部回転部材の周方向対称位置に形成した突出部
を、前記回転駆動部材の周方向対称位置に形成したキー
溝に挿入して成るオイルポンプ構造において、 前記回転駆動部材のキー溝の回転方向の両端面に円弧を
形成したことを特徴とするオイルポンプ構造。
4. An oil pump structure in which an internal rotation member and a rotation drive member of an oil pump are drive-coupled,
In an oil pump structure, a protrusion formed at a circumferentially symmetric position of the internal rotation member is inserted into a key groove formed at a circumferentially symmetric position of the rotation drive member, wherein the rotation direction of the key groove of the rotation drive member is An oil pump structure wherein arcs are formed on both end faces of the oil pump.
JP16242097A 1997-06-19 1997-06-19 Oil pump structure Pending JPH1113640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16242097A JPH1113640A (en) 1997-06-19 1997-06-19 Oil pump structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16242097A JPH1113640A (en) 1997-06-19 1997-06-19 Oil pump structure

Publications (1)

Publication Number Publication Date
JPH1113640A true JPH1113640A (en) 1999-01-19

Family

ID=15754269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16242097A Pending JPH1113640A (en) 1997-06-19 1997-06-19 Oil pump structure

Country Status (1)

Country Link
JP (1) JPH1113640A (en)

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* Cited by examiner, † Cited by third party
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US10883499B2 (en) 2015-01-27 2021-01-05 Denso Corporation Fuel pump including a protruding portion and connecting an inner gear and a rotary shaft
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US20180010606A1 (en) * 2015-01-27 2018-01-11 Denso Corporation Fuel pump
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JP2016200126A (en) * 2015-04-14 2016-12-01 株式会社デンソー Fuel pump
JP2016200129A (en) * 2015-04-14 2016-12-01 株式会社デンソー Fuel pump
KR101876071B1 (en) * 2016-10-31 2018-07-06 현대 파워텍 주식회사 Connecting structure of torque convertor hub and oil pump gear for an automatic transmission
EP4265910A1 (en) * 2022-04-12 2023-10-25 Delphi Technologies IP Limited Fluid pump with thrust bearing driver
US12018680B2 (en) 2022-04-12 2024-06-25 Phinia Delphi Luxembourg Sarl Fluid pump with thrust bearing driver

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