JP2007126974A - Electromagnetic pump - Google Patents

Electromagnetic pump Download PDF

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JP2007126974A
JP2007126974A JP2005317938A JP2005317938A JP2007126974A JP 2007126974 A JP2007126974 A JP 2007126974A JP 2005317938 A JP2005317938 A JP 2005317938A JP 2005317938 A JP2005317938 A JP 2005317938A JP 2007126974 A JP2007126974 A JP 2007126974A
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pump
electromagnetic
discharge
pump chamber
suction
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Yukihiro Shoji
幸広 庄司
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Nachi Fujikoshi Corp
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Nachi Fujikoshi Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic pump simplified in structure by forming an electromagnetic valve integrally with a pump mechanism and capable of discharging a low-pressure large flow and a high-pressure small flow by one electromagnetic pump. <P>SOLUTION: This electromagnetic pump 60 comprises the electromagnetic valve 61 and a pump part 62 engaged with the electromagnetic valve 61. In the pump part 62, a body 78 is engaged with a stopper 68 by a screw mechanism, and the rod 73 of the stopper 68 is connected to one end of a stepped piston 81 slidably inserted into the body 78 with a retainer disposed therebetween. The other end of the stepped piston 81 is pressed by a spring member 85 engaged with a piston shaft 86a fitted to the body 78. A suction passage 88 and a discharge passage 89 communicate with the large diameter hole part 79a of a stepped hole part 79, and a suction check valve 91 is installed in the suction passage 88 and a discharge check valve 90 is installed in the discharge passage 89 to form the pump mechanism 92. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電磁ポンプに関し、さらに詳細には電磁弁の操作により液体を低圧大流量と高圧小流量に吐出をすることができる電磁ポンプに関する。   The present invention relates to an electromagnetic pump, and more particularly to an electromagnetic pump capable of discharging a liquid into a low pressure high flow rate and a high pressure small flow rate by operating an electromagnetic valve.

従来、工作機などにおいてチャッキングやクランプ等に使用する油圧装置では、可変ポンプを使用しているが、クランプ時や待機状態も常にポンプ（電動機）が定常回転しているため、損失が大きい。更なる省エネを行うため、電動機にインバータを付け、電動機の回転数制御を行い、無駄な流量を吐出させず、吐出流量が不要なときは電動機の回転数を下げ、省エネを図っている（例えば、特許文献１参照）。
特開２００１−２８０２５７号公報 Conventionally, a hydraulic device used for chucking or clamping in a machine tool or the like uses a variable pump. However, since the pump (electric motor) always rotates at the time of clamping and in a standby state, the loss is large. In order to further save energy, an inverter is attached to the motor, the motor speed is controlled, and no unnecessary flow rate is discharged. When the discharge flow rate is unnecessary, the motor speed is reduced to save energy (for example, , See Patent Document 1).
JP 2001-280257 A

しかしながら、特許文献１ではインバータにより電動機の回転数を制御し省エネを図っているが、クランプ中、電動機は低回転でありながら回転しているため損失は発生している。また、小さいシリンダによるクランプでもインバータやコントローラ、ドライバーが必要であり、コストを抑制することができない。
本発明は、上記の不具合を解決するためになされたもので、電磁コイルと流体を吸入・吐出するポンプ機構を有するポンプ本体とを一体にし、１台の電磁ポンプで低圧大流量と高圧小流量を吐出することにより、回転構造の電動機・ポンプを使用することなく、クランプ等の油圧源に電磁ポンプを作動させることにより、小型化、省エネを図ることができる電磁ポンプを提供することを目的とする。 However, in Patent Document 1, the number of revolutions of the electric motor is controlled by an inverter to save energy. However, a loss occurs because the electric motor is rotating at a low speed during clamping. Even with a small cylinder clamp, an inverter, controller, and driver are required, and the cost cannot be reduced.
The present invention has been made to solve the above-described problems. The electromagnetic coil and a pump body having a pump mechanism for sucking and discharging fluid are integrated, and a low pressure high flow rate and a high pressure small flow rate are provided by a single electromagnetic pump. The purpose is to provide an electromagnetic pump that can be reduced in size and save energy by operating the electromagnetic pump to a hydraulic source such as a clamp without using a rotating structure electric motor / pump. To do.

上記の課題を達成するために請求項１記載の発明は、
電磁弁部材と、
前記電磁弁部材に液密に係合されたポンプ部材と、
を備えた電磁ポンプにおいて、
前記ポンプ部材は、
ポンプ本体に設けられた段差形状のポンプ室と、
前記ポンプ本体に設けられ前記ポンプ室に連通するポンプ機構と、
を有し、
前記電磁弁部材の励磁、非励磁の作動により前記ポンプ室を稼動させて前記ポンプ機構により吸入路から吐出路に流れる液体の流量を制御することができる。 In order to achieve the above object, the invention described in claim 1
A solenoid valve member;
A pump member liquid-tightly engaged with the electromagnetic valve member;
In an electromagnetic pump with
The pump member is
A step-shaped pump chamber provided in the pump body;
A pump mechanism provided in the pump body and communicating with the pump chamber;
Have
The pump chamber can be operated by the excitation or non-excitation operation of the electromagnetic valve member, and the flow rate of the liquid flowing from the suction path to the discharge path can be controlled by the pump mechanism.

請求項２記載の発明では、前記ポンプ機構は、前記ポンプ本体に設けられた前記吸入路と、
前記ポンプ本体に設けられた前記吐出路と、前記吐出路の途中に設けられた吸入逆止弁と、を備えるので、構造が簡素化されコンパクト化を図ることができるのでよい。
請求項３記載の発明では、前記ポンプ室は、前記ポンプ本体に形成され前記吸入路及び前記吐出路に連通する段付孔部と、前記段付孔部に摺動自在に嵌挿されたピストン部材と、を備え、前記ポンプ室は前記ピストン部材の小径部のポンプ室と大径部と小径部の段差部により形成されると、前記ポンプ部材は段付ピストンにより構造が簡単で、２種類の流量が得られるのでよい。 In the invention of claim 2, the pump mechanism includes the suction passage provided in the pump body,
Since the discharge passage provided in the pump body and the suction check valve provided in the middle of the discharge passage are provided, the structure can be simplified and the size can be reduced.
According to a third aspect of the present invention, the pump chamber includes a stepped hole portion formed in the pump body and communicating with the suction passage and the discharge passage, and a piston slidably fitted in the stepped hole portion. The pump chamber is formed by a pump chamber of a small diameter portion of the piston member and a step portion of the large diameter portion and the small diameter portion, and the pump member has a simple structure by a stepped piston and is of two types The flow rate of

請求項４記載の発明では、前記小径部のポンプ室の吐出口と大径部と小径部の段差部に形成されたポンプ室の吐出口を各吐出逆止弁の後部で接続されると、段付き部の流量と小径部の流量が合流されるので、大きな流量が得られるのでよい。
請求項５記載の発明では、前記小径部のポンプ室に低圧の安全弁が形成されると、吐出側の圧力が上がると小径部の大流量は小径部の吐出路に設けられた安全弁から吸入部へ戻され、段差部のポンプ室のみが吐出され、高圧の圧力が得られるのでよい。
請求項６記載の発明では、前記電磁ポンプの電圧を調整することにより吐出圧を変えると、電磁ポンプに入れる電圧を調整することによりコイルの吸引力が上がるため、吐出圧の調整が可能となり、従来の油圧回路で必要な圧力調整弁なしで圧力の調整が可能になるのでよい。 In the invention of claim 4, when the discharge port of the pump chamber of the small diameter portion and the discharge port of the pump chamber formed in the step portion of the large diameter portion and the small diameter portion are connected at the rear of each discharge check valve, Since the flow rate of the stepped portion and the flow rate of the small diameter portion are merged, a large flow rate may be obtained.
In a fifth aspect of the present invention, when a low-pressure safety valve is formed in the small-diameter pump chamber, when the pressure on the discharge side rises, a large flow rate of the small-diameter portion is increased from a safety valve provided in the discharge passage of the small-diameter portion. It is sufficient that only the pump chamber of the stepped portion is discharged and a high pressure is obtained.
In the invention of claim 6, if the discharge pressure is changed by adjusting the voltage of the electromagnetic pump, the suction force of the coil is increased by adjusting the voltage to be put into the electromagnetic pump, so that the discharge pressure can be adjusted. This is because the pressure can be adjusted without the pressure adjusting valve required in the conventional hydraulic circuit.

本発明は、油圧クランプなどの油圧回路に従来の電動機、回転型のポンプを必要とせず、電磁ポンプ１台で高低圧ポンプの機能を有するため、シリンダの早送りとクランプが他のバルブを必要とせず、小さい電磁ポンプ１台ですることができる。また、クランプ時は電磁ポンプの通電を止めることにより、省エネになる。   The present invention does not require a conventional electric motor or rotary pump in a hydraulic circuit such as a hydraulic clamp, and has one high-low pressure pump function with one electromagnetic pump. It can be done with one small electromagnetic pump. In addition, energy is saved by stopping energization of the electromagnetic pump during clamping.

本発明の実施の形態に係る電磁ポンプについて図面により詳細に説明する。図１は、本発明の第一の実施の形態に係る電磁ポンプ６０の概略構造を示す縦断面図である。
図１に示すように、電磁ポンプ６０は、基本的には吸引力を発生する電磁弁６１と、ポンプ部６２とから構成されている。 An electromagnetic pump according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a schematic structure of an electromagnetic pump 60 according to the first embodiment of the present invention.
As shown in FIG. 1, the electromagnetic pump 60 basically includes an electromagnetic valve 61 that generates a suction force and a pump unit 62.

前記電磁弁６１は、磁界を発生させる電磁コイル６４と、外部磁路となるコイルボビン６５、リング６６、６７とを備えるコイル本体６３と、磁界が付与されると固定鉄心であるストッパ６８に吸引される可動鉄心の機能を有するプランジャ６９と、前記プランジャ６９を支持し、かつ該プランジャ６９に磁界を付与するためのガイド７０と、該ガイド７０からストッパ６８にプランジャ６９を介して磁界が流れるように溶接した非磁性体７１とを備えるスリーブ本体７２から形成される。この場合、電磁コイル６４はコイルボビン６５に装着され、かつリング６６、６７と共にコイルボビン６５に嵌挿された状態で、金型（図示しない）にインサートされて射出成形機によりコイル本体６３が成形される。   The electromagnetic valve 61 is attracted by a coil body 63 including an electromagnetic coil 64 that generates a magnetic field, a coil bobbin 65 and rings 66 and 67 that are external magnetic paths, and a stopper 68 that is a fixed iron core when a magnetic field is applied. A plunger 69 having the function of a movable iron core, a guide 70 for supporting the plunger 69 and applying a magnetic field to the plunger 69, and a magnetic field flows from the guide 70 to the stopper 68 via the plunger 69. It is formed from the sleeve main body 72 provided with the welded nonmagnetic material 71. In this case, the electromagnetic coil 64 is mounted on the coil bobbin 65 and is inserted into the coil bobbin 65 together with the rings 66 and 67, and is inserted into a mold (not shown), and the coil body 63 is molded by an injection molding machine. .

前記ストッパ６８には、その軸心部に前記プランジャ６９と一体的に形成されるロッド７３が変位自在に嵌挿され、該プランジャ６９の一端部が後述するリテーナ８２ａを介して段付ピストン（ピストン部材）８１に接続されている。
なお、コイル本体６３とスリーブ本体７２とを組付けるときは、コイル本体６３の孔６３ａにスリーブ７４を挿入し、該スリーブ７４のボス部７５に形成されたねじ部７５ａに固定ナット７６が螺着されている。さらに、ストッパ６８に一端部に形成される突出部７７は、ポンプ部６２の本体（ポンプ本体）７８の穴部８３ａに形成するねじ部８４ａに接合される。 A rod 73 formed integrally with the plunger 69 is inserted into the stopper 68 so as to be displaceable at an axial center thereof, and one end of the plunger 69 is inserted into a stepped piston (piston) via a retainer 82a described later. Member) 81.
When the coil main body 63 and the sleeve main body 72 are assembled, the sleeve 74 is inserted into the hole 63a of the coil main body 63, and the fixing nut 76 is screwed to the screw portion 75a formed in the boss portion 75 of the sleeve 74. Has been. Further, the protruding portion 77 formed at one end of the stopper 68 is joined to a screw portion 84 a formed in the hole 83 a of the main body (pump main body) 78 of the pump portion 62.

前記本体の７８の段付孔部７９に摺動自在に嵌挿された前記段付ピストン８１は、大径軸部８１ａが段付孔部７９の大径孔部７９ａに嵌挿され、小径軸部８１ｂが段付孔部７９の小径孔部７９ｂに係合されており、かつ該段付ピストン８１は一端部がリテーナ８２ａによりストッパ６８に係合され、他端部がリテーナ８２ｂによりばね部材８５を介してピストン軸８６ａに接合されている。なお、小径軸部８１ｂは軸心方向に大径孔部７９ａに延伸しており、段付孔部７９と段付ピストン８１とによりポンプ室８０が形成されている。
また、小径軸部８１ｂは本体７８の穴部８３ｂとによりポンプ室１００が形成されている。
前記ピストン軸８６ａは、本体７８の端面に開口した穴部８３ｂにねじ部８４ｂに螺着したボス部８７にねじ機構に進退自在に設けられたねじ軸８６ｂに係合している。ねじ軸８６ｂを軸心方向に変位させると、ピストン軸８６ａの移動によりばね部材８５の弾発力が調整される。よって、前記ばね部材８５の弾発力の調整により段付ピストン８１に作用する電磁弁６１の励磁による吸引力が制御されると共に、該電磁弁６１の非励磁時における段付ピストン８１の復帰力が調整される。 The stepped piston 81 slidably fitted in the stepped hole 79 of the main body 78 has a large diameter shaft portion 81a fitted in the large diameter hole 79a of the stepped hole portion 79, and a small diameter shaft. The portion 81b is engaged with the small diameter hole 79b of the stepped hole 79, and one end of the stepped piston 81 is engaged with the stopper 68 by the retainer 82a, and the other end is engaged by the spring 82 with the retainer 82b. Is joined to the piston shaft 86a. The small diameter shaft portion 81b extends in the axial direction to the large diameter hole portion 79a, and the stepped hole portion 79 and the stepped piston 81 form a pump chamber 80.
The small-diameter shaft portion 81 b forms a pump chamber 100 with the hole portion 83 b of the main body 78.
The piston shaft 86a is engaged with a screw shaft 86b provided in a boss portion 87 screwed to a screw portion 84b in a hole portion 83b opened in the end surface of the main body 78 so as to be able to advance and retreat in a screw mechanism. When the screw shaft 86b is displaced in the axial direction, the elastic force of the spring member 85 is adjusted by the movement of the piston shaft 86a. Therefore, the attraction force by the excitation of the electromagnetic valve 61 acting on the stepped piston 81 is controlled by adjusting the elastic force of the spring member 85, and the restoring force of the stepped piston 81 when the electromagnetic valve 61 is not excited. Is adjusted.

一方、ポンプ室８０の大径孔部７９ａには、本体７８に穿設され該大径孔部７９ａの軸心方向に略直交して吸入路８８、吐出路８９が連通している。前記吸入路８８は液体を収納するタンク装置（図示しない）に連通しており、前記吐出路８９は液体の供給先であるシリンダ、バルブ（図示しない）に接続されている。さらに、吐出路８９の途中には、吐出逆止弁９０が設けられている。前記吐出逆止弁９０は、液体が吸込路８８から吐出路８９に流れる際に開口し、液体が逆流方向である吐出路８９から吸入路８８に流れるときに閉塞する。また、吸入路８８の途中には吸入逆止弁９１が設けられている。前記吸入逆止弁９１は、液体が吸入路８８から流れるときは開口し、液体が逆方向である吐出路８９から吸入路８８に流れるときは閉塞する。ここで、吸入路８８、吸入逆止弁９１、吐出路８９、吐出吸入弁９０によりポンプ機構９２が形成される。   On the other hand, a suction passage 88 and a discharge passage 89 communicate with the large-diameter hole 79a of the pump chamber 80 so as to be formed in the main body 78 and substantially perpendicular to the axial direction of the large-diameter hole 79a. The suction path 88 communicates with a tank device (not shown) that stores liquid, and the discharge path 89 is connected to a cylinder and a valve (not shown) that are liquid supply destinations. Further, a discharge check valve 90 is provided in the middle of the discharge path 89. The discharge check valve 90 opens when the liquid flows from the suction path 88 to the discharge path 89 and closes when the liquid flows from the discharge path 89 in the reverse flow direction to the suction path 88. A suction check valve 91 is provided in the suction path 88. The suction check valve 91 is opened when the liquid flows from the suction path 88 and is closed when the liquid flows from the discharge path 89 in the reverse direction to the suction path 88. Here, a pump mechanism 92 is formed by the suction path 88, the suction check valve 91, the discharge path 89, and the discharge suction valve 90.

穴部８３ｂの一側には、軸方向に略直交する流路９３が設けられ、該流路９３は穴部８３ａ及び吸入路８８に連通する連通路９４に接続している。流路９３とポンプ室１００との途中には吸入逆止弁１０１が設けられている。穴部８３ｂの他側には、流路９５が設けられ、該流路９５が吐出路８９に連通する連通路９６に接続しており、前記連通路９６の途中には吐出逆止弁１０２が設けられている。
ここで、連通路９４，吸入逆止弁１０１，流路９５、吐出逆止弁１０２によりポンプ機構９３が形成される。また、連通路９４及び９６に接続する配管１０４、１０６の途中にはポンプ機構１０３の安全機能を有する安全弁１０５が設けられている。
なお、前記連通路９４は、段付ピストン８１が矢印ＸまたはＹ方向に変位した際、穴部８３ａに収納された液体を穴部８３ｂに流し、穴部８３ａの液体の圧力を下げる機能を有する。 A channel 93 that is substantially orthogonal to the axial direction is provided on one side of the hole 83 b, and the channel 93 is connected to a communication channel 94 that communicates with the hole 83 a and the suction channel 88. A suction check valve 101 is provided midway between the flow path 93 and the pump chamber 100. A flow path 95 is provided on the other side of the hole 83 b, and the flow path 95 is connected to a communication path 96 communicating with the discharge path 89, and a discharge check valve 102 is disposed in the middle of the communication path 96. Is provided.
Here, a pump mechanism 93 is formed by the communication path 94, the suction check valve 101, the flow path 95, and the discharge check valve 102. A safety valve 105 having a safety function of the pump mechanism 103 is provided in the middle of the pipes 104 and 106 connected to the communication passages 94 and 96.
The communication path 94 has a function of flowing the liquid stored in the hole 83a to the hole 83b and reducing the pressure of the liquid in the hole 83a when the stepped piston 81 is displaced in the direction of the arrow X or Y. .

本発明の第一の実施の形態に係わる電磁ポンプ６０は基本的には以上のように構成されるものであり、図２により電磁ポンプ６０の動作について説明する。
図２（Ａ）は、電磁コイル６４が非励磁（ＯＦＦ）の保持状態を示している。この状態では、ばね部材８５の弾発力により段付ピストン８１がリテーナ８２ｂ、８２ａを介して矢印Ｘ方向に変位する。よって、ロッド７３がプランジャ６９と共に矢印Ｘ方向に変位する。そのとき、ポンプ室８０は、段付ピストン８１が矢印Ｘ方向に移動して引き込まれるので負圧の状態に保持される。よって、液体が吸入路８８から吸入逆止弁９１を開いてポンプ室８０に吸い込まれ、該ポンプ室８０に充填される。また、ポンプ室１００も段付ピストン８１が矢印Ｘ方向に移動して引き込まれるので負圧の状態に保持され、液体が吸入路８８、連通路９４から吸入逆止弁１０１を開いてポンプ室１００に吸い込まれ、該ポンプ室１００に充填される。 The electromagnetic pump 60 according to the first embodiment of the present invention is basically configured as described above, and the operation of the electromagnetic pump 60 will be described with reference to FIG.
FIG. 2A shows a holding state in which the electromagnetic coil 64 is not excited (OFF). In this state, the stepped piston 81 is displaced in the direction of the arrow X via the retainers 82b and 82a by the elastic force of the spring member 85. Therefore, the rod 73 is displaced together with the plunger 69 in the arrow X direction. At that time, the pump chamber 80 is held in a negative pressure state because the stepped piston 81 moves in the arrow X direction and is pulled. Accordingly, the liquid opens the suction check valve 91 from the suction path 88 and is sucked into the pump chamber 80 and filled in the pump chamber 80. Further, the pump chamber 100 is also held in a negative pressure state because the stepped piston 81 moves in the direction of the arrow X and is pulled in, so that the liquid opens the suction check valve 101 from the suction passage 88 and the communication passage 94 and pumps 100. The pump chamber 100 is filled.

図２（Ｂ）に示すように、電磁コイル６４を励磁（ＯＮ）にすると、プランジャ６９は、ストッパ６８に吸着されるため矢印Ｙ方向に変位する。よって、段付ピストン８１はリテーナ８２ａを介してロッド７３により押圧され、ばね部材８５がリテーナ８２ｂにより矢印Ｙ方向に撓む。これにより、ポンプ室８０は、段付ピストン８１が移動し吸入逆止弁９１が閉じポンプ室８０内の液体が加圧され、該液体によって吐出逆止弁９０が開くので液体が吐出逆止弁９０、吐出路８９より吐出される。また、ポンプ室１００は段付ピストン８１が移動し吸入逆止弁１０１が閉じポンプ室１００内の液体が加圧され、該液体によって吐出逆止弁１０２が開くので液体が該吐出逆止弁１０２、連通路９６より吐出路８９に合流する。
この場合、ポンプ室８０の体積は段付ピストン８１が矢印Ｙ方向に変位すると共に、減少し、液体がポンプ室８０より吐出逆止弁９０を介して吐出路８９に吐出される際、大径軸部８１ａと小径軸部８１ｂとの断面積差により流量が調整される。よって、電磁コイル６４の電磁力、すなわちプランジャ６９を吸引するストッパ６８に付勢される吸引力を制御することによりポンプ室８０から吐出路８９に供給される液体の圧力を調整することができる。 As shown in FIG. 2B, when the electromagnetic coil 64 is energized (ON), the plunger 69 is adsorbed by the stopper 68 and is displaced in the arrow Y direction. Therefore, the stepped piston 81 is pressed by the rod 73 via the retainer 82a, and the spring member 85 is bent in the arrow Y direction by the retainer 82b. Thereby, in the pump chamber 80, the stepped piston 81 is moved, the suction check valve 91 is closed, the liquid in the pump chamber 80 is pressurized, and the discharge check valve 90 is opened by the liquid, so that the liquid is discharged. 90, discharged from the discharge path 89. Further, in the pump chamber 100, the stepped piston 81 moves, the suction check valve 101 is closed, the liquid in the pump chamber 100 is pressurized, and the discharge check valve 102 is opened by the liquid, so that the liquid is discharged to the discharge check valve 102. Then, the discharge passage 89 merges from the communication passage 96.
In this case, the volume of the pump chamber 80 decreases as the stepped piston 81 is displaced in the direction of the arrow Y, and when the liquid is discharged from the pump chamber 80 through the discharge check valve 90 to the discharge passage 89, the diameter of the pump chamber 80 increases. The flow rate is adjusted by the difference in cross-sectional area between the shaft portion 81a and the small diameter shaft portion 81b. Therefore, the pressure of the liquid supplied from the pump chamber 80 to the discharge path 89 can be adjusted by controlling the electromagnetic force of the electromagnetic coil 64, that is, the suction force biased by the stopper 68 that sucks the plunger 69.

図２（Ｃ）は、電磁コイル６４の励磁完了状態を示している。この状態では、プランジャ６９がストッパ６８に吸引され、ロッド７３が段付ピストン８１を介してばね部材８５を矢印Ｙ方向に撓み、電磁コイル６４の吸引力とばね部材８５の弾発力とが平衡に確保されている。
図２（Ｄ）に示すように、電磁コイル６４を非励磁にすると、電磁コイル６４の吸引力は無くなり、よって、段付ピストン８１はばね部材８５の弾発力によりロッド７３と協動し、プランジャ６９が矢印Ｘ方向に移動する。これにより、ポンプ室８０は負圧になり、該ポンプ室８０は吸入路８８に設けられた吸入逆止弁９１を開き、ポンプ室８０は該吸入路８８からポンプ室８０に液体が充填される。また、ポンプ室１００も負圧になり、該ポンプ室１００は連通路９４に設けられた吸入逆止弁１０１を開き、ポンプ室１００には吸入路８８、該連通路９４から液体が充填される。 FIG. 2C shows the excitation completion state of the electromagnetic coil 64. In this state, the plunger 69 is attracted by the stopper 68, and the rod 73 deflects the spring member 85 in the arrow Y direction via the stepped piston 81, so that the attracting force of the electromagnetic coil 64 and the elastic force of the spring member 85 are balanced. Is secured.
As shown in FIG. 2 (D), when the electromagnetic coil 64 is de-excited, the attractive force of the electromagnetic coil 64 disappears. The plunger 69 moves in the arrow X direction. As a result, the pump chamber 80 becomes negative pressure, the pump chamber 80 opens the suction check valve 91 provided in the suction passage 88, and the pump chamber 80 is filled with liquid from the suction passage 88. . The pump chamber 100 also has a negative pressure, and the pump chamber 100 opens the suction check valve 101 provided in the communication path 94, and the pump chamber 100 is filled with liquid from the suction path 88 and the communication path 94. .

電磁コイル６４への励磁、非励磁を繰り返し、吐出路８９から配管された図示していないシリンダなどへの液体が充満し、圧力が上がると図３のようにポンプ室１００の液体は流路９５、連通路９６、配管１０６より安全弁１０５を開き、ポンプ室１００の液体は配管１０４を通り、連通路９４より吸入路８８に戻される。
ポンプ室８０の液体は段付ピストン８１の断面積が小さいため、更に圧力を上げることができ、図示していないシリンダの押付力が大きくすることができる。
図４で説明すると、低圧時はポンプ室８０から吐出されるＱ１の流量とポンプ室１００から吐出される流量（Ｏ２−Ｑ１）との合成された流量Ｑ２が吐出され、圧力がＰ１を超えると安全弁１０５から流量（Ｑ２−Ｑ１）が流れ、Ｑ１流量が吐出される。
また、電磁コイルの吸引力は電圧により大きくなるので、電圧を変えることによりシリンダの押付力が調整可能になる。 Excitation and de-excitation of the electromagnetic coil 64 is repeated, and liquid in a cylinder (not shown) or the like piped from the discharge path 89 is filled and when the pressure rises, the liquid in the pump chamber 100 flows into the flow path 95 as shown in FIG. The safety valve 105 is opened from the communication path 96 and the pipe 106, and the liquid in the pump chamber 100 passes through the pipe 104 and is returned to the suction path 88 through the communication path 94.
Since the liquid in the pump chamber 80 has a small sectional area of the stepped piston 81, the pressure can be further increased and the pressing force of a cylinder (not shown) can be increased.
Referring to FIG. 4, when a low pressure is applied, a combined flow rate Q2 of a flow rate of Q1 discharged from the pump chamber 80 and a flow rate (O2-Q1) discharged from the pump chamber 100 is discharged, and the pressure exceeds P1. A flow rate (Q2-Q1) flows from the safety valve 105, and a Q1 flow rate is discharged.
Moreover, since the attractive force of the electromagnetic coil increases with voltage, the pressing force of the cylinder can be adjusted by changing the voltage.

図５は、本発明の第二の実施の形態に係わる電磁ポンプ１１０の概略構造を示す縦断面図である。図５中、図１の構成要素と同一の構成要素については同一符号を付して詳細な説明を省略する。   FIG. 5 is a longitudinal sectional view showing a schematic structure of the electromagnetic pump 110 according to the second embodiment of the present invention. In FIG. 5, the same components as those of FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

本発明の第一の実施の形態に係わる電磁ポンプの概略構造を示す縦断面図である。It is a longitudinal section showing a schematic structure of an electromagnetic pump concerning a first embodiment of the present invention. 図１の電磁ポンプの動作説明図である。It is operation | movement explanatory drawing of the electromagnetic pump of FIG. 図１の安全弁が開いた状態を示す説明図である。It is explanatory drawing which shows the state which the safety valve of FIG. 1 opened. 本発明の電磁ポンプと圧力、流量特性線図である。It is an electromagnetic pump of this invention, a pressure, and a flow rate characteristic diagram. 本発明の第二の実施の形態に係わる電磁ポンプの概略構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of the electromagnetic pump concerning 2nd embodiment of this invention.

符号の説明Explanation of symbols

６０、１１０ 電磁ポンプ ６１ 電磁弁
６２ ポンプ部 ６３ コイル部
６４ 電磁コイル ６８ ストッパ
６９ プランジャ ７３ ロッド
７８ 本体 ７９ 段付孔部
８０ ポンプ室 ８１ 段付ピストン
８８ 吸入路 ８９ 吐出路
９０、１０２ 吐出逆止弁 ９１、１０１ 吸入逆止弁
９２、１０３ ポンプ機構 ９３、９５ 流路
９４、９６ 連通路 １０５ 安全弁

60, 110 Electromagnetic pump 61 Electromagnetic valve 62 Pump part 63 Coil part 64 Electromagnetic coil 68 Stopper 69 Plunger 73 Rod 78 Body 79 Stepped hole part 80 Pump chamber 81 Stepped piston 88 Suction path 89 Discharge path 90, 102 Discharge check valve 91, 101 Suction check valve 92, 103 Pump mechanism 93, 95 Flow path 94, 96 Communication path 105 Safety valve

Claims (6)

電磁弁部材と、
前記電磁弁部材に液密に係合されたポンプ部材と、
を備えた電磁ポンプにおいて、
前記ポンプ部材は、
ポンプ本体に設けられた段差形状のポンプ室と、
前記ポンプ本体に設けられ前記ポンプ室に連通するポンプ機構と、
を有し、
前記電磁弁部材の励磁、非励磁の作動により前記ポンプ室を稼動させて前記ポンプ機構により吸入路から吐出路に流れる液体の流量を調整することを特徴とする電磁ポンプ。 A solenoid valve member;
A pump member liquid-tightly engaged with the electromagnetic valve member;
In an electromagnetic pump with
The pump member is
A step-shaped pump chamber provided in the pump body;
A pump mechanism provided in the pump body and communicating with the pump chamber;
Have
An electromagnetic pump characterized by adjusting the flow rate of the liquid flowing from the suction path to the discharge path by the pump mechanism by operating the pump chamber by excitation and non-excitation of the electromagnetic valve member. 請求項１記載の電磁ポンプにおいて、前記ポンプ機構は、
前記ポンプ本体に設けられた前記吸入路と、
前記ポンプ本体に設けられた前記吐出路と、
前記吐出路の途中に設けられた吸入逆止弁と、
を備えることを特徴とする電磁ポンプ。 The electromagnetic pump according to claim 1, wherein the pump mechanism is
The suction passage provided in the pump body;
The discharge passage provided in the pump body;
A suction check valve provided in the middle of the discharge path;
An electromagnetic pump comprising: 請求項１または２記載の電磁ポンプにおいて、前記ポンプ室は、
前記ポンプ本体に形成され前記吸入路及び前記吐出路に連通する段付孔部と、
前記段付孔部に摺動自在に嵌挿されたピストン部材と、
を備え、
前記ポンプ室は前記ピストン部材の小径部のポンプ室と大径部と小径部の段差部により形成されたことを特徴とする電磁ポンプ。 The electromagnetic pump according to claim 1 or 2, wherein the pump chamber is
A stepped hole formed in the pump body and communicating with the suction passage and the discharge passage;
A piston member slidably inserted into the stepped hole,
With
2. The electromagnetic pump according to claim 1, wherein the pump chamber is formed by a pump chamber of a small diameter portion of the piston member, a large diameter portion, and a step portion of the small diameter portion. 請求項１乃至３のいずれか１に記載の電磁ポンプにおいて、前記小径部のポンプ室の吐出口と大径部と小径部の段差部に形成されたポンプ室の吐出口を各吐出逆止弁の後部で接続されたことを特徴とする電磁ポンプ。   4. The electromagnetic pump according to claim 1, wherein the discharge port of the pump chamber of the small-diameter portion, the discharge port of the pump chamber formed at the step portion of the large-diameter portion, and the small-diameter portion are connected to each discharge check valve. An electromagnetic pump characterized by being connected at the rear part. 請求項４記載の電磁ポンプにおいて、前記小径部のポンプ室に低圧の安全弁が形成されたことを特徴とする電磁ポンプ。   5. The electromagnetic pump according to claim 4, wherein a low-pressure safety valve is formed in the pump chamber of the small diameter portion. 請求項１乃至５のいずれか１に記載の電磁ポンプにおいて、前記電磁ポンプの電圧を調整することにより吐出圧を変えることを特徴とする電磁ポンプ。
6. The electromagnetic pump according to claim 1, wherein the discharge pressure is changed by adjusting a voltage of the electromagnetic pump.
JP2005317938A 2005-11-01 2005-11-01 Electromagnetic pump Pending JP2007126974A (en)

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