JPH0679106U - Bobbin for solenoid valve - Google Patents

Abstract

(57) [Summary] [Object] To provide a bobbin for a solenoid valve in which one end side and the other end side are press-fitted into another member and a reliable liquid-tight seal can be made at the fitting portion. [Structure] A fitting hole surface 11 for press-fitting the stator 2 is provided on one end side. Further, on the other end side, a cylindrical protruding portion 14 that is press-fitted into the end frame 3 is integrally provided. This bobbin 10 has a thick fitting portion with the stator 2,
3. Since the reinforcing effect of the coil 6 wound around the winding drum 12 is also obtained, the one end side does not open and deform during press-fitting of the stator, and the close contact with the stator is improved and the liquid sealing performance is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bobbin for a solenoid valve that controls a pressure fluid.

[0002]

[Prior art]

 Among solenoid valves used in a brake fluid pressure control unit of an automobile anti-lock brake system (so-called ABS), there is a solenoid valve as shown in FIG. In the figure, 1 is a top frame, 2 is a stator, 3 is an end frame, 4 is a bobbin, 5 is a guide ring (sleeve), and 6 is a coil.

In this solenoid valve, one end of the guide ring 5 is press-fitted into the outer circumference of the stator 2 and the other end is press-fitted into the inner circumference of the small-diameter portion of the end frame 3, and both press-fitting points are used as liquid sealing parts to brake fluid into the bobbin storage chamber. It is designed to prevent leaks.

[0004]

[Problems to be solved by the device]

 When the guide ring 5 is press-fitted onto the outer circumference of the stator 2, the guide ring 5 is deformed into a trumpet shape (the press-fitting end side opens the mouth) during press fitting due to the interference between the two existing in the design, and the design is in close contact. There was a gap between the stator and the guide ring, which should be present, and the brake fluid inside leaked into the bobbin storage chamber through the gap.

An object of the present invention is to provide a bobbin for a solenoid valve which is a solution to this liquid leakage.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the bobbin of the present invention has a hole surface for press-fitting and fitting a stator of a solenoid valve in a liquid-tight manner at one end and a cylindrical shape integrally formed with a winding cylinder and a collar at the other end. The structure is such that it has a protruding portion, and the end frame of the solenoid valve is press-fitted into the outer periphery of the cylindrical protruding portion in a liquid-tight manner.

[0007]

[Action]

 The bobbin of the present invention has an integrated form with a conventional guide ring. In the conventional guide ring, the thickness cannot be sufficiently secured due to the design restriction, and therefore the deformation due to press fitting becomes large.However, in the structure of the present invention, the stator fitting part has a bobbin with a guide ring thickness. The bobbin collar and the wound coil have the effect of reinforcing the bobbin collar and the winding coil thickness, which minimizes the amount of deformation of the mating part when the stator is press-fitted, and ensures tight contact with the stator. The property is improved and the liquid sealing performance is improved.

[0008]

【Example】

 FIG. 1 shows a specific example of the bobbin of the present invention. As shown in the figure, the bobbin 10 has a fitting hole surface 11 into which the stator 2 is press-fitted on one end side. Further, it has a cylindrical projecting portion 14 integrally formed with the winding drum 12 and the collar 13 on the other end side, and the coil 6 is wound on the winding drum 12 between the pair of opposing collars 13, 13. . The coil 6 is wound before press-fitting the bobbin 10 onto the outer circumference of the stator 2. Therefore, the coil 6 also acts to receive the expanding force applied during press-fitting of the stator, and helps prevent deformation.

The cylindrical protrusion 14 is press-fitted into the small-diameter portion of the end frame 3 as in the conventional case, so that both sides of the bobbin are liquid-sealed over a wide area to prevent leakage of liquid toward the bobbin storage chamber. Is prevented.

The material of the bobbin 10 must be a non-magnetic material, but it is possible to appropriately select and use a metal material such as stainless steel or plastic according to the application of the solenoid valve and the operating pressure. Is.

[0011]

[Effect of device]

 As described above, the bobbin of the present invention is configured so that the bobbin itself is press-fitted to the outer circumference of the stator and the small diameter portion of the end frame, and deformation due to press-fitting of the stator-side fitting portion is suppressed. It improves and the liquid sealing property improves. Therefore, when it is said that the thickness of the guide ring cannot be easily increased despite being exposed to high pressure like the ABS solenoid valve, the bobbin of the present invention can be used to prevent liquid leakage. It can be expected to have a particularly great effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a bobbin of the present invention in a used state.

FIG. 2 is a cross-sectional view showing a usage state of a conventional bobbin that is liquid-sealed using a guide ring.

[Explanation of symbols]

 1 Top Frame 2 Stator 3 End Frame 6 Coil 10 Bobbin 11 Fitting Hole Face 12 Winding Body 13 Collar 14 Cylindrical Projection

Claims (1)

[Scope of utility model registration request] 1. A cylindrical surface is formed on one end side for press-fitting and fitting a stator of a solenoid valve in a liquid-tight manner, and on the other end side is formed a cylindrical projecting portion integrally formed with a winding cylinder and a collar. A solenoid valve bobbin with a structure in which the end frame of the solenoid valve is press-fitted into the outer periphery of the protrusion in a liquid-tight manner.