JP2008196643A

JP2008196643A - Solenoid valve

Info

Publication number: JP2008196643A
Application number: JP2007034279A
Authority: JP
Inventors: Kentaro Kumakura; 健太郎熊倉
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2007-02-15
Filing date: 2007-02-15
Publication date: 2008-08-28

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize sliding resistance between a shaft 9 and a bearing member 10, in a solenoid valve 1. <P>SOLUTION: The bearing member 10 slidably holds the shaft 9 in the axial direction by a projecting part 19 formed on the inside surface 18, and a contact surface 21 of the projecting part 19 to a circumferential surface 20 is formed into a projecting curved surface-like shape. Thereby, since the shaft 9 is supported by the projecting curved surface-like contact surface 21, the contact state between the circumferential surface 20 and the contact surface 21 does not change even if the shaft 9 tilts. Thereby, the sliding resistance between the shaft 9 and the bearing member 10 can be stabilized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電磁弁に関する。 The present invention relates to a solenoid valve.

従来より、ソレノイドコイルへの通電により軸方向に変位するプランジャと、プランジャと一体的かつ同軸的に設けられるシャフトとを備え、プランジャ及びシャフトの変位によって、弁体を軸方向に変位させる電磁弁が公知である。 2. Description of the Related Art Conventionally, an electromagnetic valve that includes a plunger that is displaced in the axial direction by energization of a solenoid coil and a shaft that is provided integrally and coaxially with the plunger, and that displaces the valve body in the axial direction by the displacement of the plunger and the shaft. It is known.

従来の電磁弁１００には、例えば、図３に示すように、シャフト１０１が軸受部材１０２により摺動自在に保持されるものがある。このように、シャフト１０１を軸受部材１０２で保持する電磁弁１００には、軸受部材１０２がステータをなすものや（特許文献１参照）、軸受部材１０２がステータと別体に設けられ、ステータに圧入されているものがある（特許文献２参照）。 Some conventional solenoid valves 100 include a shaft 101 slidably held by a bearing member 102 as shown in FIG. Thus, in the solenoid valve 100 that holds the shaft 101 with the bearing member 102, the bearing member 102 forms a stator (see Patent Document 1), or the bearing member 102 is provided separately from the stator, and is press-fitted into the stator. (See Patent Document 2).

ところで、従来の電磁弁１００では、軸受部材１０２の内周面１０３は、軸方向の両端でエッジ１０４を形成しているため（図３（ａ）参照）、シャフト１０１の傾きに応じて、シャフト１０１の外周面１０５とエッジ１０４との接触状態が変動し、シャフト１０１と軸受部材１０２との間の摺動抵抗がばらつく。そこで、エッジ１０４をＲ形状に加工することにより外周面１０５とエッジ１０４との接触を回避する技術が提案されている（図３（ｂ）参照）。しかし、この技術でも、Ｒ形状の部分とストレート形状の部分との境界点が外周面１０５に接触するため、シャフト１０１と軸受部材１０２との間の摺動抵抗が安定しない。
特許第２８４１８９１号公報特開平０９−１６６２３８号公報 By the way, in the conventional solenoid valve 100, since the inner peripheral surface 103 of the bearing member 102 forms edges 104 at both ends in the axial direction (see FIG. 3A), the shaft depends on the inclination of the shaft 101. The contact state between the outer peripheral surface 105 of the 101 and the edge 104 varies, and the sliding resistance between the shaft 101 and the bearing member 102 varies. Therefore, a technique for avoiding contact between the outer peripheral surface 105 and the edge 104 by processing the edge 104 into an R shape has been proposed (see FIG. 3B). However, even in this technique, since the boundary point between the R-shaped portion and the straight-shaped portion contacts the outer peripheral surface 105, the sliding resistance between the shaft 101 and the bearing member 102 is not stable.
Japanese Patent No. 2841891 JP 09-166238 A

本発明は上記の問題点を解決するためになされたものであり、その目的は、電磁弁において、シャフトと軸受部材との間の摺動抵抗を安定させることにある。 The present invention has been made to solve the above-described problems, and an object thereof is to stabilize sliding resistance between a shaft and a bearing member in an electromagnetic valve.

〔請求項１の手段〕
請求項１に記載の電磁弁は、ソレノイドコイルへの通電により軸方向に変位するプランジャと、このプランジャと一体的かつ同軸的に設けられるシャフトと、このシャフトを軸方向に摺動自在に保持する軸受部材とを備え、軸受部材は、内径側に突出する突出部によりシャフトを軸方向に摺動自在に保持する。そして、シャフトの外周面に対する突出部の当接面が凸曲面状に設けられている。 [Means of Claim 1]
The solenoid valve according to claim 1 is a plunger that is displaced in the axial direction by energization of the solenoid coil, a shaft that is provided integrally and coaxially with the plunger, and that holds the shaft slidably in the axial direction. A bearing member, and the bearing member holds the shaft slidable in the axial direction by a projecting portion projecting toward the inner diameter side. And the contact surface of the protrusion part with respect to the outer peripheral surface of a shaft is provided in the convex curve shape.

これにより、凸曲面状の当接面によりシャフトが支持されるので、シャフトが傾いてもシャフトの外周面と軸受部材の当接面との接触状態は変動しない。このため、シャフトと軸受部材との間の摺動抵抗を安定させることができる。 Thus, the shaft is supported by the convex curved contact surface, so that the contact state between the outer peripheral surface of the shaft and the contact surface of the bearing member does not change even if the shaft is inclined. For this reason, the sliding resistance between the shaft and the bearing member can be stabilized.

〔請求項２の手段〕
請求項２に記載の電磁弁によれば、軸受部材は、突出部の反プランジャ側の内周面に凹部を有する。
これにより、潤滑油を凹部に溜めることができるので、シャフトの外周面と軸受部材の内周面との間の潤滑状態を良好に維持することができる。 [Means of claim 2]
According to the electromagnetic valve of the second aspect, the bearing member has the concave portion on the inner peripheral surface of the protruding portion on the side opposite to the plunger.
Thereby, since lubricating oil can be stored in a recessed part, the lubrication state between the outer peripheral surface of a shaft and the inner peripheral surface of a bearing member can be maintained favorable.

〔請求項３の手段〕
請求項３に記載の電磁弁によれば、軸受部材は、プランジャと軸方向に対向配置されるステータである。
これにより、軸受部材とステータとを一体化して、部品点数を削減することができる。 [Means of claim 3]
According to the electromagnetic valve of the third aspect, the bearing member is a stator that is disposed to face the plunger in the axial direction.
Thereby, a bearing member and a stator can be integrated and a number of parts can be reduced.

最良の形態１の電磁弁は、ソレノイドコイルへの通電により軸方向に変位するプランジャと、このプランジャと一体的かつ同軸的に設けられるシャフトと、このシャフトを軸方向に摺動自在に保持する軸受部材とを備え、軸受部材は、内径側に突出する突出部によりシャフトを軸方向に摺動自在に保持する。また、シャフトの外周面に対する突出部の当接面が凸曲面状に設けられている。
また、軸受部材は、突出部の反プランジャ側の内周面に凹部を有する。
また、軸受部材は、プランジャと軸方向に対向配置されるステータである。 The electromagnetic valve of the best mode 1 includes a plunger that is displaced in the axial direction by energization of a solenoid coil, a shaft that is integrally and coaxially provided with the plunger, and a bearing that holds the shaft slidably in the axial direction. The bearing member holds the shaft so as to be slidable in the axial direction by a protruding portion protruding toward the inner diameter side. Further, the contact surface of the protruding portion with respect to the outer peripheral surface of the shaft is provided in a convex curved surface shape.
Further, the bearing member has a concave portion on the inner peripheral surface of the protruding portion on the side opposite to the plunger.
The bearing member is a stator that is arranged to face the plunger in the axial direction.

〔実施例１の構成〕
実施例１の電磁弁１の構成を、図１及び図２を用いて説明する。
電磁弁１は、スリーブ２の内部に、弁体として機能するスプール３を摺動自在に支持し、電磁ソレノイド部４によりスプール３を駆動して、流路の開閉調節等を行うものであり、オートマチックトランスミッションにおける供給油圧を操作するために用いられる。 [Configuration of Example 1]
A configuration of the solenoid valve 1 of the first embodiment will be described with reference to FIGS. 1 and 2.
The electromagnetic valve 1 slidably supports a spool 3 functioning as a valve element inside a sleeve 2 and drives the spool 3 by an electromagnetic solenoid unit 4 to adjust opening and closing of the flow path. Used to operate supply hydraulic pressure in automatic transmission.

また、電磁ソレノイド部４は、ソレノイドコイル７への通電により軸方向に変位するプランジャ８と、プランジャ８と一体的かつ同軸的に設けられるシャフト９と、シャフト９を軸方向に摺動自在に保持する軸受部材１０とを備える。
なお、軸受部材１０は、プランジャ８の一端側に対向配置されるステータとしても機能する。 The electromagnetic solenoid unit 4 also includes a plunger 8 that is displaced in the axial direction by energization of the solenoid coil 7, a shaft 9 that is provided integrally and coaxially with the plunger 8, and a shaft 9 that is slidable in the axial direction. The bearing member 10 is provided.
The bearing member 10 also functions as a stator that is disposed opposite to one end of the plunger 8.

そして、ソレノイドコイル７が通電を受けると、プランジャ８は、ステータとして機能する軸受部材１０、ヨーク１３及び他端側の磁性部材１４と共に磁気回路を形成し、一端側に変位する。そして、シャフト９がプランジャ８と一体的に変位し、シャフト９に当接されるスプール３が一端側に変位する。
また、ソレノイドコイル７への通電が停止されると、スプリング１５の付勢力により、スプール３、シャフト９及びプランジャ８が他端側に変位する。 When the solenoid coil 7 is energized, the plunger 8 forms a magnetic circuit together with the bearing member 10 functioning as a stator, the yoke 13 and the magnetic member 14 on the other end side, and is displaced to one end side. Then, the shaft 9 is displaced integrally with the plunger 8, and the spool 3 that is in contact with the shaft 9 is displaced to one end side.
When the energization of the solenoid coil 7 is stopped, the spool 3, the shaft 9 and the plunger 8 are displaced to the other end side by the biasing force of the spring 15.

次に、軸受部材１０について詳述する。
軸受部材１０は、他端側の内周面１８に、内径側に突出する突出部１９が環状に形成されており、突出部１９によりシャフト９を軸方向に摺動自在に保持する。また、シャフト９の外周面２０に対する突出部１９の当接面２１は、凸曲面状に設けられている。また、内周面１８には、突出部１９の一端側（つまり、反プランジャ側）に外周側に窪む凹部２２が環状に形成されている。 Next, the bearing member 10 will be described in detail.
In the bearing member 10, a projecting portion 19 projecting toward the inner diameter side is formed in an annular shape on the inner peripheral surface 18 on the other end side, and the projecting portion 19 holds the shaft 9 slidably in the axial direction. Moreover, the contact surface 21 of the protrusion part 19 with respect to the outer peripheral surface 20 of the shaft 9 is provided in the convex curve shape. Further, the inner peripheral surface 18 is formed with an annular recess 22 that is recessed on the outer peripheral side on one end side (that is, on the side opposite to the plunger) of the protruding portion 19.

〔実施例１の効果〕
実施例１の電磁弁１によれば、軸受部材１０は、内周面１８に形成された突出部１９によりシャフト９を軸方向に摺動自在に保持し、外周面２０に対する突出部１９の当接面２１は、凸曲面状に設けられている。
これにより、凸曲面状の当接面２１によりシャフト９が支持されるので、シャフト９が傾いても外周面２０と当接面２１との接触状態は変動しない。このため、シャフト９と軸受部材１０との間の摺動抵抗を安定させることができる。 [Effect of Example 1]
According to the solenoid valve 1 of the first embodiment, the bearing member 10 holds the shaft 9 slidably in the axial direction by the projecting portion 19 formed on the inner peripheral surface 18, and the projecting portion 19 against the outer peripheral surface 20 is contacted. The contact surface 21 is provided in a convex curved surface shape.
Thereby, since the shaft 9 is supported by the convex curved contact surface 21, the contact state between the outer peripheral surface 20 and the contact surface 21 does not change even if the shaft 9 is inclined. For this reason, the sliding resistance between the shaft 9 and the bearing member 10 can be stabilized.

また、内周面１８には、突出部１９の一端側に外周側に窪む凹部２２が環状に形成されている。これにより、潤滑油を凹部２２に溜めることができるので、外周面２０と内周面１８との間の潤滑状態を良好に維持することができる。
また、実施例１の軸受部材１０は、プランジャ８と共に磁気回路を形成するステータとしても機能するため、軸受部材１０とステータとを一体化して、部品点数を削減することができる。 Further, the inner peripheral surface 18 is formed with an annular recess 22 that is recessed toward the outer peripheral side on one end side of the protruding portion 19. Thereby, since lubricating oil can be stored in the recessed part 22, the lubrication state between the outer peripheral surface 20 and the inner peripheral surface 18 can be maintained favorable.
Moreover, since the bearing member 10 of Example 1 functions also as a stator which forms a magnetic circuit with the plunger 8, it can integrate the bearing member 10 and a stator, and can reduce a number of parts.

〔変形例〕
実施例１によれば、軸受部材１０はステータとしても機能するものであったが、軸受部材１０をステータと別体に設け、ステータに圧入させてもよい。 [Modification]
According to the first embodiment, the bearing member 10 also functions as a stator. However, the bearing member 10 may be provided separately from the stator and press-fitted into the stator.

電磁弁の全体構成図である（実施例１）。1 is an overall configuration diagram of a solenoid valve (Example 1). FIG. 軸受部材によるシャフトの支持状態を示す説明図である（実施例１）。It is explanatory drawing which shows the support state of the shaft by a bearing member (Example 1). 軸受部材によるシャフトの支持状態を示す説明図である（従来例）。It is explanatory drawing which shows the support state of the shaft by a bearing member (conventional example).

Explanation of symbols

１電磁弁
４電磁ソレノイド部
７ソレノイドコイル
８プランジャ
９シャフト
１０軸受部材
１８内周面
１９突出部
２０外周面
２１当接面
２２凹部 DESCRIPTION OF SYMBOLS 1 Solenoid valve 4 Electromagnetic solenoid part 7 Solenoid coil 8 Plunger 9 Shaft 10 Bearing member 18 Inner peripheral surface 19 Protrusion part 20 Outer peripheral surface 21 Contact surface 22 Recessed part

Claims

A plunger that is displaced in the axial direction by energizing the solenoid coil;
A shaft provided integrally and coaxially with the plunger;
In a solenoid valve comprising a bearing member that holds the shaft slidably in the axial direction,
The bearing member holds the shaft slidably in the axial direction by a projecting portion projecting to the inner diameter side,
The electromagnetic valve according to claim 1, wherein a contact surface of the protruding portion with respect to an outer peripheral surface of the shaft is provided in a convex curved surface shape.

The solenoid valve according to claim 1,
The solenoid valve according to claim 1, wherein the bearing member has a recess on an inner peripheral surface of the protrusion on the side opposite to the plunger.

In the solenoid valve according to claim 1 or 2,
The electromagnetic valve according to claim 1, wherein the bearing member is a stator that is arranged to face the plunger in the axial direction.