JPH04105680U - Solenoid proportional control valve - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce manufacturing costs and the labor required for assembly. [Structure] An intermediate member 6 is disposed between the spool 2 and the armature 3. The intermediate member 6 is entirely made of resin and includes a shaft portion 6a and a membrane portion 6b. Both ends of the shaft portion 6a abut against the armature 3 and the spool 2, respectively, and transmit movement of the armature 3 to the spool 2. The outer peripheral portion of the membrane portion 6b is fitted into the annular recess 1a of the housing 1. [Effect] In addition to being able to achieve the objective, there is an effect that the magnetic force of the solenoid for moving the armature 3 can be effectively used.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on an electromagnetic ratio that provides hydraulic output proportional to the amount of current applied to the solenoid. An example concerns a control valve.

0002

[Conventional technology]

Generally, the electromagnetic proportional control valve is mounted on one end side inside the housing 1, as shown in FIG. A spool 2 is slidably provided, and a solenoid (not shown) is provided at the other end. ) and the armature 3 that moves by the magnetic force of the spool 2 and the armature. 3 and transmits the movement of armature 3 to spool 2 (transmission spring). component) 4, and a hydraulic output proportional to the amount of current applied to the solenoid can be obtained. (Refer to Japanese Patent Laid-Open No. 2-142983).

0003 By the way, in the electromagnetic proportional control valve, the access point is - When hydraulic oil flows into the other end where mature 3 is installed, dirt contained in the hydraulic oil etc., the smooth movement of the armature 3 may be hindered. So, in part A film-like shielding member 5 made of resin is provided between the side and the other end. This shielding The member 5 usually has its outer circumference fitted into the annular recess 1a of the housing 1, and its inner circumference. is fitted into the annular recess 2a of the spool 2.

0004

[Problem that the idea aims to solve]

In the electromagnetic proportional control valve with the above configuration, small parts such as the spring 4 and the shielding member 5 are Since there are many parts, manufacturing costs increase and assembly is time-consuming. It was. In particular, when installing the shielding member 5, the outer periphery of the shielding member 5 should be attached to the housing 1. At the same time as fitting into the annular recess 1a of the spool 2, its inner circumference is fitted into the annular recess 2a of the spool 2. There was a problem in that it required a lot of effort and effort.

[0005] This idea was made to solve the above problem and reduce the number of parts. By doing so, manufacturing costs can be reduced, and the labor required for assembly can be reduced. The purpose of the present invention is to provide an electromagnetic proportional control valve that can

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this device has a spool that automatically slides inside one end. There is an arc inside the other end that is moved by the magnetic force of the solenoid. An armature is provided between these spools and the armature. A transmission member is provided for transmitting the motion to the spool, and further includes a transmission member for transmitting the motion from one end to the other end. An electromagnetic proportional control equipped with a film-like shielding member to prevent hydraulic fluid from flowing in. In the control valve, the transmission member and the shielding member are integrally formed of resin. It is characterized by the following.

[0007]

[Effect]

By integrally forming the transmission member and shielding member, the number of parts can be reduced. At the same time, the labor required for assembly can be reduced.

[0008]

【Example】

An embodiment of this invention will be described below with reference to FIG. In this embodiment, the movement is performed by spool 2 and a solenoid (not shown). An intermediate member 6 is arranged between the closed armature 3 and the armature 3 . This intermediate member 6 is made entirely of resin, and is composed of a shaft portion 6a and a membrane portion 6b. Ru. The shaft portion 6a and the membrane portion 6b are integrally molded.

[0009] The shaft portion 6a is for transmitting movement of the armature 3 to the spool 2. , one end surface abuts the spool 2 and the other end abuts the armature 3. . As is clear from this, the shaft portion 6a replaces the spring of the conventional electromagnetic proportional control valve. It is something. Therefore, when determining the material, dimensions, etc. of the shaft portion 6a, In this case, it should have a spring constant equivalent to that of a spring.

0010 On the other hand, the membrane portion 6b replaces the shielding member of the conventional electromagnetic proportional control valve. By fitting the outer peripheral part of the spool 2 into the annular recess 1a of the housing 1, the spool 2 The one end side where the armature 3 is provided is cut off from the other end side where the armature 3 is provided. . In addition, the membrane portion 6b allows the shaft portion 6a, the spool 2, and the armature 3 to move smoothly. The middle part in the diametrical direction is thin so as not to impede movement. It is formed to have sufficient flexibility.

[0011] Note that the configuration other than the above is the same as that of a conventional electromagnetic proportional control valve. The explanation will be omitted.

0012 In the electromagnetic proportional control valve with the above configuration, the conventional electromagnetic proportional control valve is a separate part. Instead of the spring (transmission member) and shielding member that were formed by Since the intermediate member 6 in which the portion 6a and the membrane portion 6b are integrally formed is used, the number of parts can be reduced. This reduces manufacturing costs and reduces assembly costs. The effort required for attachment can be reduced. In particular, regarding the membrane portion 6b, All you have to do is fit the peripheral part into the recess 1a of the housing 1, and then insert the inner peripheral part into the spool 2 etc. There is no need to fit it into other parts. Therefore, the assembly effort is further reduced. can be done.

[0013] Furthermore, this electromagnetic proportional control valve efficiently utilizes the magnetic force of the solenoid. can be done. In other words, in conventional electromagnetic proportional control valves, the transmission member is Because a steel spring was used, the magnetic force of the solenoid leaked through the spring. It was difficult to use magnetic force effectively. In this respect, the electromagnetic proportional control valve of this invention In this case, since the intermediate member 6 is made of resin, leakage of magnetic force can be prevented. I can do it. Therefore, the magnetic force of the solenoid can be used efficiently. child In other words, the solenoid can be made smaller; This allows the electromagnetic proportional control valve to be made smaller.

[0014] In the above embodiment, the shaft portion 6a and the membrane portion 6b are made of the same resin. However, they may be made of different resins. In that case, the shaft 6a is made of a relatively hard resin, and the membrane part 6b is made of a relatively soft resin. is desirable.

[0015]

[Effect of the idea]

As explained above, according to the electromagnetic proportional control valve of this invention, the conventional electromagnetic proportional control valve In the control valve, the transmission member and the shielding member, which were separate from each other, are integrated with resin. Since it is formed on the body, it is possible to reduce the number of parts and reduce manufacturing costs. The magnetic force of the solenoid This makes it possible to make the electromagnetic proportional control valve more compact. You can achieve effects such as:

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the invention.

FIG. 2 is a sectional view showing the main parts of a conventional electromagnetic proportional control valve.

[Explanation of symbols]

1 Housing 2 spool 3 Armature 6 Intermediate member 6a Shaft part 6b Membrane part

Claims (1)

[Scope of utility model registration request] Claim 1: A spool is slidably provided inside one end, and an armature that is moved by the magnetic force of a solenoid is provided inside the other end. In the electromagnetic proportional control valve, the electromagnetic proportional control valve is provided with a transmission member that transmits transmission to the spool, and further provided with a film-like shielding member for preventing hydraulic oil from flowing from one end side to the other end side. An electromagnetic proportional control valve characterized in that a shielding member and a shielding member are integrally formed of resin.