JP2014214789A - Electromagnetic valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic valve capable of preventing malfunction caused by engagement of a foreign matter and having high operation stability at a low cost.SOLUTION: An electromagnetic valve 1 includes: a valve main body 40 having a valve chamber 45; a valve body 64 arranged in the valve chamber 45 so as to be moved in a horizontal direction and allowed to be in contact/separated with/from a valve seat formed in the valve chamber 45 by excitation/non-excitation of an electromagnetic coil 21; and a plurality of rib-like guide projections formed integrally with the valve main body 40 in the vicinity of the valve seat to guide horizontal movement of the valve body 64. Two outlet ports 10a, 42a are communicated to the valve chamber 45 and the valve seat may be formed on either one of the outlet ports 10a, 42a. Even when the electromagnetic valve 1 is laterally arranged, the electromagnetic valve 1 can perform stable operation.

Description

  The present invention relates to a solenoid valve used for switching a flow path of a washer fluid in a window washer device installed in an automobile.

  As an electromagnetic valve used for the above-mentioned application, Patent Document 1 discloses that a valve element guide member made up of a plurality of pins as a guide member is concentrically arranged in a valve chamber of a valve housing formed in a lower part of an electromagnetic coil. A solenoid valve that realizes expansion of the flow path in the valve chamber and smooth operation of the valve element by slidably guiding the disk-shaped valve element made of a magnetic material in a point contact state. It is disclosed.

Japanese Utility Model Publication No. 3-24947

  However, in the solenoid valve described in Patent Document 1, the position of the valve body, etc., depends on the tolerance of the hole position of the valve chamber into which a plurality of pins are inserted, the outer diameter tolerance of the pins, the inclination of the pins at the time of insertion, and the like. There is a problem that malfunction occurs due to variation and biting of foreign matter, and the sealing performance between the valve seat and the valve body deteriorates. Moreover, since it is necessary to assemble a plurality of pins into the valve chamber with high accuracy, it takes time and leads to an increase in manufacturing cost.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic valve with high operational stability at a low cost, which prevents malfunction due to biting of foreign matter.

  In order to achieve the above object, an electromagnetic valve according to the present invention is disposed in a valve body having a valve chamber and is movable in the horizontal direction in the valve chamber, and is in contact with a valve seat in the valve chamber by excitation and non-excitation of an electromagnetic coil. And a plurality of rib-shaped guide protrusions which are integrally formed with the valve body in the vicinity of the valve seat and guide the movement of the valve body in the horizontal direction.

  According to the solenoid valve of the present invention having a rib-shaped guide projection, malfunction due to foreign object biting is prevented, the sliding stability of the plunger is increased, the operational stability is improved, and the manufacturing cost is also reduced. it can.

  Since a plurality of rib-shaped guide protrusions are provided in the vicinity of the valve seat, even when the solenoid valve is placed horizontally, that is, even when the solenoid valve is arranged so that the valve body moves in the horizontal direction, the valve seat and the valve body And a good seal can be maintained between the valve seat and the valve body.

  Two outlet ports communicate with the valve chamber and can be selectively opened and closed by the valve body.

  As described above, according to the solenoid valve of the present invention having the rib-shaped guide protrusion, the malfunction due to the biting of foreign matter is prevented, the sliding stability of the plunger is increased, the operation stability is improved, and the valve seat is improved. The seal between the valve body and the valve body can be maintained well, and the manufacturing cost can be reduced.

It is sectional drawing which shows one Embodiment of the solenoid valve which concerns on this invention. It is an expanded sectional view which shows the valve body of the solenoid valve of FIG. 1, and its vicinity. It is AA sectional view taken on the line of FIG. 2A. It is sectional drawing for demonstrating operation | movement of the solenoid valve of FIG. 1, Comprising: The state which excited the electromagnetic coil is shown. It is sectional drawing for demonstrating operation | movement of the solenoid valve of FIG. 1, Comprising: The state which made the electromagnetic coil non-excited is shown.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of a solenoid valve according to the present invention. The electromagnetic valve 1 is mounted on a vehicle and switches a flow path of a liquid such as a cleaning liquid or other fluid, and a valve body 40 having a valve chamber 45 communicating with each of an inlet port 41a and a first outlet port 42a. A valve body 64 disposed in the valve chamber 45, a valve holder 60 that holds the valve body 64, a coil spring 66 that presses the valve holder 60 in the direction of the first outlet port 42a, and a valve chamber 45 It has the 2nd exit port 10a which communicates. Further, the pipe member 10 extending rightward from the valve chamber 45, the attractor 50 surrounding the pipe member 10, the electromagnetic coil 21 surrounding the attractor 50, the coil bobbin 20 around which the electromagnetic coil 21 is wound, and the entire coil bobbin 20 A surrounding mold cover 30 is provided.

  The resin valve body 40 has an inflow pipe 41 extending downward from the peripheral wall and an outflow pipe 42 extending leftward from the left end surface. An inlet port 41 a is formed in the inflow pipe 41, and a first outlet port 42 a is formed in the outflow pipe 42. In the valve chamber 45, the inlet port 41a and the first outlet port 42a communicate with each other in an L-shaped cross section. An annular welded joint wall 44 that protrudes toward the mold cover 30 is provided around the right opening of the valve body 40.

  The right end side of the outflow pipe 42 of the valve body 40 protrudes into the valve chamber 45. Further, the opening of the inlet port 41 a of the inflow pipe 41 communicates with the valve chamber 45 and is configured to guide the washer liquid into the valve chamber 45.

  As shown in FIGS. 2A and 2B, the valve body 40 has a horizontal movement of the valve body 64 in the vicinity of the valve seat 42 b of the outflow pipe 42 (the horizontal direction of the valve body holding part 62 that holds the valve body 64). A plurality of rib-shaped guide protrusions 40a for guiding the movement). A flow path 40 c is formed between the adjacent guide protrusion 40 a and the inner peripheral surface 40 b of the valve body 40.

  As shown in FIG. 1, the resin-made pipe member 10 has a disk-shaped weld projection 11 extending in the vertical direction at an intermediate portion, and the second outlet port 10 a communicates with the valve chamber 45.

  The resin-made coil bobbin 20 includes a body 22 around which the electromagnetic coil 21 is wound, and a pair of flange portions 23 and 24 that restrict variation of the winding of the electromagnetic coil 21 at both ends thereof.

  The attractor 50 is formed in a cylindrical shape from a magnetic metal, and is disposed between the inner peripheral surface of the body 22 of the coil bobbin 20 and the outer peripheral surface of the pipe member 10.

  The mold cover 30 is made of resin, and is integrally formed on the pipe member 10 coaxially so as to cover the coil bobbin 20. The electromagnetic coil 21 and the attractor 50 are covered with a housing 70 made of a magnetic material outside the mold cover 30.

  A connector part 35 is formed integrally with the mold cover 30, and an external terminal 36 for energizing the electromagnetic coil 21 protrudes inside the connector part 35.

  Between the outer peripheral surface of the pipe member 10 and the body 22 of the coil bobbin 20, an attractor 50 is located on the right side with respect to the disc-shaped welding projection 11, and a cylindrical valve holder made of a magnetic material is located on the left side. 60 is positioned so as to be movable in the horizontal direction along the outer peripheral surface of the pipe member 10.

  The valve holder 60 is slidably disposed between the inner periphery of the coil bobbin 20 and the outer periphery of the pipe member 10, and as shown in FIGS. 2A and 2B, a cylindrical body positioned between the pipe member 10 and the coil bobbin 20. 61 and a valve body holding portion 62 that holds the valve body 64 at the tip of the cylinder body 61. One or a plurality of liquid insertion holes (fluid insertion holes) 63 are opened in the intermediate portion of the valve holder 60, and the valve body holding portion 62 has elasticity such as rubber having the same diameter as the inner diameter of the valve body holding portion 62. A valve body 64 formed of the material having the material is fixed by an appropriate method.

  In the present embodiment, this fixing is performed by a recess (holding) in which a plurality of protrusions or annular protrusions provided on the outer periphery of the valve body 64 are formed inside the valve body holding portion 62 using the elasticity of the valve body 64. However, the valve body 64 may be fixed using means such as caulking or bonding.

  A spring insertion groove 65 having one end closed and the other end opened is formed on the inner peripheral surface of the cylindrical body 61, and a coil spring 66 that constantly presses the valve holder 60 toward the valve seat 42 b of the outflow pipe 42 is formed in the spring insertion groove 65. Has been inserted.

  Next, the operation of the solenoid valve 1 having the above configuration will be described with reference to FIGS. 1, 3A and 3B.

  When the electromagnetic coil 21 is not energized, as shown in FIG. 3B, the valve body 64 is moved to the left by the valve holder 60 pressed to the left by the coil spring 66, and the left surface of the valve body 64 is the valve of the outflow pipe 42. It contacts the seat 42b and closes the first outlet port 42a. Therefore, the liquid (for example, washer fluid) that has flowed into the valve chamber 45 from the inlet port 41a of the inflow pipe 41 is not guided to the first outlet port 42a, but the liquid insertion hole of the valve holder 60 through the valve chamber 45. From 63, it guides to the left end opening of the 2nd exit port 10a of the pipe member 10, flows out from the right end opening of the said 2nd exit port 10a, for example, is injected to the windshield of a front or a rear.

  On the other hand, when the electromagnetic coil 21 is energized from the external terminal 36, the electromagnetic coil 21 is excited, the magnetic field generated by the electromagnetic coil 21 acts on the attractor 50, and the valve holder 60 is moved to the right in the attractor 50. Force is generated. As a result, the suction element 50 moves the valve holder 60 to the right against the leftward spring force of the coil spring 66, and the right surface of the valve body 64 faces the valve seat 10 b of the pipe member 10 as shown in FIG. 3A. Abuts and closes the second outlet port 10a. Therefore, the washer fluid that has flowed into the valve chamber 45 from the inlet port 41a is guided to the right end opening of the first outlet port 42a through the valve chamber 45 without being guided to the second outlet port 10a. 1 flows out from the left end opening of the outlet port 42a and is ejected to, for example, a rear camera.

  That is, the valve body 64 always contacts the valve seat 42b of the outflow pipe 42, closes the first outlet port 42a, opens the second outlet port 10a, and attracts the attractor 50 by the magnetic force of the energized electromagnetic coil 21. As a result, the valve body 64 moves to contact the valve seat 10b of the pipe member 10, closes the second outlet port 10a, and opens the first outlet port 42a. In this way, the flow path is switched in the valve chamber 45.

  When the valve body 64 is moved in the horizontal direction, the cylindrical body 61 of the valve holder 60 is guided in the horizontal direction between the inner peripheral surface of the body 22 of the coil bobbin 20 and the outer periphery of the coil spring 66. The valve body holder 62 is guided in the horizontal direction by coming into contact with a plurality of rib-like guide protrusions 40a protruding from the inner peripheral surface 40b located in the vicinity of the valve seat 42b of the valve body 40. Therefore, even in an environment where the pipe member 10 and the valve holder 60 are arranged in the horizontal direction and the valve body 64 is easily moved downward, the position of the valve body 64 does not vary, and the valve body 64 and the outflow pipe 42. It is possible to ensure good sealing performance between the valve seat 42b and between the valve body 64 and the valve seat 10b of the pipe member 10.

  In the above description, the electromagnetic valve 1 is mounted on a vehicle and the flow path of liquid such as cleaning liquid or other fluid is switched. However, the present invention is not limited to this.

DESCRIPTION OF SYMBOLS 1 Electromagnetic valve 10 Pipe member 10a 2nd outlet port 10b Valve seat 11 Disc-shaped welding projection part 20 Coil bobbin 21 Electromagnetic coil 22 Body 23, 24 Collar part 30 Mold cover 35 Connector part 36 External terminal 40 Valve main body 40a Guide protrusion 40b Inner peripheral surface 40c Flow path 41 Inflow pipe 41a Inlet port 42 Outflow pipe 42a First outlet port 42b Valve seat 44 Annular weld joint wall 45 Valve chamber 50 Suction element 60 Valve holder 61 Cylindrical body 62 Valve body holding part 63 Liquid insertion hole (Fluid insertion hole)
64 Valve body 65 Spring insertion groove 66 Coil spring 70 Housing

Claims (2)

A valve body having a valve chamber;
A valve body that is movably disposed in the valve chamber in a horizontal direction, and that contacts and separates from the valve seat in the valve chamber by excitation and non-excitation of an electromagnetic coil;
An electromagnetic valve comprising: a plurality of rib-shaped guide protrusions that are integrally formed with the valve body in the vicinity of the valve seat and guide the movement of the valve body in the horizontal direction. Two outlet ports communicate with the valve chamber,
The electromagnetic valve according to claim 1, wherein opening and closing are selectively switched by the valve body.