JPH0643449U - solenoid valve - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The position of the guide member can be fixed without crimping, the filter mounting area is reduced and the cost is reduced, and the position of the guide member is fixed and the filter is mounted. The number of steps can be reduced and the assembling efficiency can be improved in one step. With a guide member 5 of a pin 32 integrated with an armature 31 provided in an armature assembly 3 housed in a sleeve 21, a valve portion 33 provided at the tip of the pin and a seat hole 25 of a valve seat 34 are misaligned. And the position of the guide member is fixed by the filter 6 for purifying the pressure fluid. The guide member is provided with a guide hole having a diameter larger than the pin diameter, the guide portion penetrating the vicinity of the valve portion of the pin into the guide hole, the flange portion having a diameter smaller than the bottom diameter of the inner hole of the body 22, and the guide portion and the flange portion. And a flow port for the pressure fluid opened between the and. The filter presses the flange portion at its bottom to fix the guide member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid valve that opens and closes a flow path of pressure fluid.

[0002]

[Prior art]

 Electromagnetic valves are incorporated in the brake pressure control system in the anti-lock braking system that avoids slip during sudden braking and the traction control system that avoids slippage of the drive wheels. As shown in FIGS. 4 and 5, this solenoid valve has a valve portion c provided at the tip of a pin b integral with an axially moving armature a, and a valve seat f provided at the bottom of an inner hole e of a body-d. The valve mechanism is configured by being seated in the sheet hole g (1) (valve closed state). At this time, as a member for preventing the misalignment of the pin b, a guide member j having a guide hole h and a pressure fluid flow port i as shown in FIG. 5 is used. As shown in FIG. 4, the guide member j is set in the body-inner hole e by penetrating the vicinity of the valve portion c of the pin b into the guide hole h, and the pressing ring k is inserted into the upper portion of the guide member j to swage it. By doing so, the position is fixed. Further, a filter 1 is used to filter the contaminants in the pressure fluid, and this filter 1 is attached to the outer periphery of the pressure fluid inflow passage m of the body-d as shown in FIG. ing.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional solenoid valve device has the following problems. <a> Since the presser ring k is fixed by crimping, a complicated caulking work in the small-diameter body-inner hole e is required, and a crimping jig and equipment are required, which is uneconomical.

<B> Since the filter 1 is mounted on the outer periphery of the body-inflow path m, the mounting area is large and the cost is increased.

<C> Since the work of mounting the presser ring k and the work of mounting the filter 1 are separate operations, the number of processes increases and the assembly efficiency decreases.

[0006]

[Purpose of the present invention]

 The present invention has been made to solve the above problems, and an object thereof is to provide the following solenoid valve. <a> An electromagnetic valve that can fix the position of the guide member without performing the conventional caulking work.

<B> A solenoid valve capable of reducing the mounting area of the filter and reducing the cost.

<C> A solenoid valve capable of fixing the position of the guide member and mounting the filter at the same time, reducing the number of steps, and improving the assembly efficiency.

[0009]

[Means for solving problems]

 The present invention comprises a core assembly which houses an armature assembly in a sleeve, and a coil assembly which is armored to the core assembly.The armature assembly comprises an armature movable in the axial direction and a pin integrated with the armature. In the solenoid valve constituting the valve mechanism, the valve portion provided at the tip of the seat is seated in the seat hole of the valve seat provided at the bottom of the inner hole of the body forming the lower part of the core assembly. The guide member prevents the misalignment between the valve portion and the sheet hole, and the position of the guide member is fixed by a filter for purifying the pressure fluid. The guide member is slightly larger than the pin diameter. Smaller than the diameter of the bottom part of the body-inner hole that is provided at the lower end of the guide part and the guide part that has a guide hole with a diameter that penetrates the vicinity of the valve part of the pin. Consists of a flange part installed on the bottom of this inner hole and a flow port for pressure fluid opened between the guide part and the flange part. It is a solenoid valve that is a cylindrical body arranged around and configured to press the flange portion of the guide member by its bottom to fix the position of the guide member.

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. <B> Overall Configuration FIG. 1 shows an electromagnetic valve set in a housing hole 11 in the housing 1. This solenoid valve includes a core assembly 2 that houses an armature assembly 3 in a sleeve 21, and a coil assembly 4 that is mounted on the core assembly 2. The armature assembly 3 includes an armature 31 that is axially movable, and an armature 31. A valve portion 33, which is formed of a pin 32 integral with 31 and is provided at the tip of this pin 32, is provided with a seat hole 25 of a valve seat 24 provided at the bottom of the inner hole 23 of the body 22 which constitutes the lower part of the core assembly 2. The valve mechanism is configured by being seated on. A pressure chamber 26 is formed in the body-internal hole 23, and an inflow passage 12 and an outflow passage 13 for the pressure fluid communicate with the pressure chamber 26. According to the present invention, in the solenoid valve having the above structure, the guide member 5 of the pin 32 holds the misalignment between the valve portion 33 and the seat hole 25, and the guide member 5 is fixed in position by the filter 6 for purifying the pressure fluid. It is characterized by doing.

<B> Guide Member As shown in FIGS. 2 and 3, the guide member 5 includes a tubular guide portion 52 having a guide hole 51 having a diameter slightly larger than the diameter of the pin 32, and a guide portion. A flange portion 53, which is provided at the lower end of 52, has a diameter smaller than the diameter of the bottom portion of the body-inner hole 23. A pressure fluid passage 54 is provided between the guide portion 52 and the flange portion 53.

<C> Filter The filter 6 is a cylindrical body having an outer diameter substantially equal to the diameter of the body-inner hole 23. For example, as shown in FIG. 2, a through hole 61 for penetrating the pin 32 is provided in the shaft center portion, and the outer diameter is formed in order from the top to the large diameter portion 62, the small diameter portion 63, and the medium diameter portion 64 so as to have a diameter difference. Use a hollow cylinder. The small-diameter portion 63 is provided with a flow port 65 for the pressure fluid, and a filter member 66 for purifying the mixed matter is stretched over the flow port 65. When the outer diameter of the filter 6 is changed as described above, the body-inner hole 23 is also provided with a difference in diameter, as shown in FIG. That is, the large diameter portion 27, the medium diameter portion 28, and the small diameter portion 29 are provided in this order from the top of the body-inner hole 23, and the medium diameter portion 27 and the filter large diameter portion 62, and the small diameter portion 29 and the filter medium diameter portion 64 are provided. Crimping is performed to fix the filter 6 by crimping.

[0013]

[Assembly method]

 Next, a method of assembling the solenoid valve will be described. First, as shown in FIG. 3, the guide member 5 is placed in a free state by mounting the flange portion 53 on the bottom surface of the body-inner hole 23. Next, with the central axis of the pin 32 substantially aligned with the central axis of the inner hole 23, the pin 32 is penetrated into the guide hole 51 of the guide member 5 from above, and the valve portion 33 is seated on the valve seat 24. The seat 25 is pressed and seated. By thus centering the pin 32, the free guide member 5 is automatically aligned. Then, in this state, the filter 6 is pressed into the body-inner hole 23 by passing the pin 32 through the through hole 61 of the filter 6. As a result, the peripheral surface of the filter 6 is pressure-bonded and fixed to the side surface of the inner hole 23, and at the same time, the upper surface of the flange portion 53 of the guide member 5 is pressed by the filter bottom surface 67, so that the guide member 5 is pressure-bonded and fixed. can do.

[0014]

[Effect of device]

 Since the present invention is as described above, the following effects can be obtained. <A> The guide member can be fixed at a predetermined position only by pressing the filter into the body-inner hole. Therefore, complicated caulking work as in the past is not necessary, and the efficiency of the assembling work of the solenoid valve can be improved.

<B> Since the means for pressing the guide member also serves as the filter, the filter can be housed in the pressure chamber. Therefore, compared with the conventional filter provided around the outer circumference of the pressure chamber, the mounting area can be reduced and the cost can be reduced.

<C> Since the structure in which the means for pressing the guide member is also used as the filter, the number of parts can be reduced, and at the same time, the position of the guide member can be fixed and the filter can be mounted at the same time. Therefore, the number of steps can be reduced and the assembling efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of the solenoid valve device of the present invention.

FIG. 2 is an enlarged perspective view of a guide member and a filter.

FIG. 3 is an enlarged sectional view of a valve mechanism section.

FIG. 4 is an explanatory diagram of a conventional technique.

FIG. 5 is an explanatory diagram of a conventional technique.

Claims (1)

[Scope of utility model registration request] 1. A core assembly having an armature assembly housed in a sleeve, and a coil assembly mounted on the core assembly, wherein the armature assembly comprises an axially movable armature and a pin integral with the armature. In a solenoid valve which constitutes a valve mechanism by seating a valve portion provided at a tip of a pin in a seat hole of a valve seat provided at a bottom portion of an inner hole of a body which constitutes a lower portion of a core assembly, the guide of the pin is provided. A member is used to prevent misalignment between the valve portion and the sheet hole, and the position of the guide member is fixed by a filter for purifying the pressure fluid, the guide member having a diameter slightly larger than the pin diameter. It has a guide hole and a guide part that penetrates the vicinity of the valve part of the pin through this guide hole, and a diameter smaller than the diameter of the bottom of the body-inner hole provided at the lower end of the guide part. In addition, it consists of a flange part installed on the bottom of this inner hole and a flow port for pressure fluid opened between the guide part and the flange part. An electromagnetic valve, which is a cylindrical body arranged in a position such that the bottom portion of the cylindrical body presses the flange portion of the guide member to fix the position of the guide member.