JP3214780B2 - Solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid having a bottomed cylindrical housing containing a coil, a fixed core and a movable core, and a flange which is fitted into an opening of the housing and which is crimped and connected. A valve body having a valve body integrally formed with a mounting arm extending radially outward from an outer peripheral surface of the housing. And a solenoid valve comprising:

[0002]

2. Description of the Related Art Such a solenoid valve is disclosed in, for example,
It is already known, as disclosed in Japanese Patent Application Laid-Open No. 4-1189.

FIG. 10 shows a coupling structure of a housing 02 of a solenoid portion S and a valve body 015 of a valve portion V in a conventional solenoid valve. That is, a flange 029 is connected to one end of the valve body 015 via a neck portion 28 having a circular cross section.
The flange 029 is connected to the housing 0
After the fitting of the housing 02 and the valve body 015 is performed, the opening edge of the housing 02 and the valve body 015 are joined together by caulking the entire edge of the opening with a cylindrical crimping tool T. The inward pressing portion Ta of T can enter the space A formed by the neck portion 028 between the housing 02 and the mounting arm 026 of the valve body 015,
It enables caulking all around.

[0004]

However, in the conventional solenoid valve, the neck portion 028 of the valve body 015 is
Since the whole has a circular cross section having a smaller diameter than the flange 029, stress is easily concentrated and disadvantageous in strength. In addition, the neck portion 028 is relatively small to avoid interference between the swaging tool T and the valve body 15. Since the length of the solenoid valve is inevitably increased, the total length of the solenoid valve is increased by the neck portion 028, thereby preventing the solenoid valve from being made compact.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a solenoid valve capable of caulking a housing and a valve body while solving the above-mentioned conventional problems.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method of caulking an opening edge of an opening of a housing by avoiding a mounting arm of a valve body.
The non-caulking part is used as the part facing the mounting arm ,
In the opening, the part not facing the mounting arm,
The first feature is that the tightening portion is formed .

[0007] In addition to the above-mentioned features, the present invention provides, in addition to the above-mentioned features, the length of the long side of the mounting arm of the valve body extending in the extending direction is substantially equal to the diameter of the flange, and the length of the short side is larger than the diameter of the flange. A flange is connected to the valve body through a small, substantially rectangular cross-section neck, and the boundary between the caulked portion and the non-caulked portion at the opening of the housing is engaged with the long side surface of the neck. This is a second feature.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment of the present invention shown in FIGS.
To explain the embodiment, in FIG. 1, a solenoid valve 1 for hydraulic control used in an automatic transmission of an automobile includes a linear solenoid unit S and a valve unit V. The solenoid part S is formed by a cylindrical housing 2 having a bottom and opened at one end by a magnetic material, and a bobbin 3 and a cover 4 made of synthetic resin.
Coil 5 mounted on housing 2 with its outer peripheral surface covered
And a fixed core 6 and a movable core 7 disposed in the hollow portion of the bobbin 3. The housing 2 is provided on the outer periphery of the fixed core 6.
A flange-shaped yoke 8 fitted into the open end of the fixed core 6 is integrally connected. A bearing 9 is provided at the center of the fixed core 6, and an operating rod 10 slidably supported by the bearing 9 is provided. It is caulked to the movable core 7.

At one end of the cover 4, a female coupler 12 projecting radially outward from a notch 11 provided at the open end of the housing 2 is integrally connected, and a coupler terminal 13 connected to the coil 5 is provided therein. Be buried.

The female coupler 12 is provided with a male coupler (not shown) constituting a coupler together with the female coupler 12 in a detachable manner. When the coil 5 is energized through these, an electromagnetic proportional to the current value is provided. Thrust can be generated in the movable core 7.

On the other hand, the valve body 15 of the valve portion V is connected to the housing 2 by a connecting structure C described later. A valve hole 16 of the valve body 15 is formed coaxially with the bearing 9, and a spool-type valve body 17 abutting on the operating rod 10 is fitted into the valve hole 16. The valve body 17 is urged by a valve spring 18 in the direction of contact with the operating rod 10, and an adjusting screw 19 for adjusting the set load of the valve spring 18 is screwed to the valve body 15.

The valve body 15 has first to sixth ports P _{1 to} P ₆ in order from the solenoid portion S side. The first port P ₁ is formed so as to accommodate the abutment of the operating rod 10 and the valve body 17, it is opened to the oil reservoir, as indicated by × marks. The second to the fifth port P ₂ to P ₅ are formed so as to surround the outer periphery of the respective valve body 17. And the fourth port P ₄ is connected to a high-pressure oil passage 21 connected to the hydraulic pressure source 20,
The third port P ₃ is connected to the control oil passage 2
3 and the second and fifth ports P ₂ and P ₅ are opened to the oil sump as shown by X. The sixth port P ₆ is formed so as to communicate with a reaction force chamber 24 facing the outer end of the valve element 17, and connects the orifice 25 to the middle of the control oil passage 23.

[0014] In Thus, the valve body 17, the third port P ₃ of the second and fourth port P _2, P in FIG from the neutral position with either not communicated to ₄ when displaced to the left third port P ₃ communicated with the fourth port P _4, so that the communicating the third port P ₃ when displaced to the right in the second port P _2.
Therefore, when the solenoid S is energized, the movable core 7
When the valve body 17 is displaced to the left against the repulsive force of the valve spring 18 due to the electromagnetic thrust acting on the operating rod 10 from the second direction, the second and third
With interrupting the connection between port P _2, P _3, third and fourth port P _3, is conduction between P _4, the hydraulic pressure is supplied to the control oil passage 23 from the high-pressure oil passage 21. The hydraulic pressure is immediately supplied to the hydraulic operating portion 22 and is also transmitted to the reaction force chamber 24 through the orifice 25. The pressing force of the hydraulic pressure and the repulsive force of the valve spring 18 serve as a reactive force to the valve body 17 as a reactive force. And presses it toward the operating rod 10. As a result, the valve element 17 moves left and right so as to balance the electromagnetic thrust of the operating rod 10 and the above-mentioned reaction force, and supplies the hydraulic operating section 22 with a hydraulic pressure proportional to the current value flowing through the solenoid section S. be able to.

The coupling structure C between the housing 2 of the solenoid portion S and the valve body 15 of the valve portion V will be described with reference to FIGS.

A pair of mounting arms 26, 26 are formed on both sides of the valve body 15 sandwiching the valve hole 16, and extend in opposite directions and outwardly from the outer peripheral surface of the housing 2. The arm 26 has a plurality of bosses 26a, 26 for bolting it to a transmission case 27 of the transmission.
a is provided.

As shown in FIGS. 4 and 5, one end of the valve body 15 facing the housing 2 is provided with a neck 2.
The flanges 29 are integrally provided via the joints 8. The flange 29 has the same diameter as the yoke 8. The neck 28 has a substantially rectangular cross section, and its long side is set to be substantially equal to the diameter of the flange 29.
6, the short side of which is set substantially equal to the thickness of the mounting arm 26.

On the other hand, the opening of the housing 2 is constituted by a thin-walled cylindrical portion 30, and an annular step 31 (see FIG. 1) extending radially inward from the inner end of the cylindrical portion 30 is formed by the bobbin 3 and the cover 4. To one end face. This annular step 31
The yoke 8 and the flange 29 are sequentially fitted into the thin-walled cylindrical portion 30 so as to abut against. The thin cylindrical portion 30 is formed to be longer than the total thickness of the yoke 8 and the flange 29 overlapping each other by a predetermined caulking allowance k.
It is formed slightly longer than the swaging margin k. Therefore, when the flange 29 is fitted into the thin cylindrical portion 30, interference between the thin cylindrical portion 30 and the mounting arm 26 can be avoided.

As shown in FIGS. 2 and 5, the opening edge of the thin-walled cylindrical portion 30 is opposed to the mounting arms 26, 26 of the valve body 15 by using a caulking tool T. By crimping inward in the radial direction except for the part b, the three members of the housing 2, the yoke 8, and the flange 29 are connected.

The caulking tool T used at this time includes:
In order to avoid interference with the mounting arms 26, 26, a notch 32 is provided in the inward pressing portion Ta.

As described above, the opening edge of the thin cylindrical portion 30 of the housing 2 is swaged around the mounting arms 26, 26 of the valve body 15 so that the mounting arm of the cylindrical portion 30 is secured.
The non-caulked portion b is formed at the portion facing the first and second
At the non-opposite portion of the cylindrical portion 30 with the mounting arms 26, 26,
The housing 2 and the valve body 15 are connected so that the swaged portion a with the flange 29 is formed .
There is no problem of interference between the swaging tool T and the mounting arms 26, 26, and therefore, the neck 28 of the flange 29 is attached to the thin cylindrical portion 3
It is possible to form the minimum length substantially equal to the swaging margin k of 0, which can greatly contribute to shortening the axial length of the solenoid valve 1. Moreover, the neck 28 has a long side with a flange 2.
Since it has a large cross section of a substantially rectangular shape that is approximately equal to the diameter of 9,
Stress concentration hardly occurs.

[0022] In the thin cylindrical portion 30, becomes the boundary portion c between the lend <br/> Me portion a said a non-crimping portion b is engaged with the long side face of the neck 28, which Thus, the housing 2 and the valve body 15 can be prevented from rotating each other.

FIG. 6 shows a second embodiment of the present invention.
The valve body 15 has the same configuration as the previous embodiment except that the neck 28 is formed so that the short side thereof is larger than the thickness of the mounting arm 26. Parts are given the same reference numerals.

According to this embodiment, in the thin cylindrical portion 30 of the housing 2, the boundary portion c between the caulked portion a and the non-caulked portion b is moved away from the valve body 15 in the lateral direction. While reliably preventing interference between the tool T and the valve body 15, the housing 2 and the valve body 15 can be prevented from rotating with each other by the engagement between the boundary c and the neck 28.

FIG. 7 shows a third embodiment of the present invention.
A thin cylindrical portion 30 of the housing 2 is provided with a pair of notches 33, 33 in which the two arms 26, 26 of the valve body 15 are fitted, while a flange 29 without a neck is provided in the valve body 15. For example, the configuration is the same as that of the first embodiment.
In the figure, parts corresponding to those of the first embodiment are denoted by the same reference numerals.

According to this embodiment, the axial length of the entire solenoid valve 1 is further reduced by the amount of removal of the neck from the flange 29.

FIGS. 8 and 9 show a third embodiment of the present invention. In the third embodiment, the opening edge of the thin cylindrical portion 30 of the housing 2 is formed at a plurality of positions excluding the portions facing the mounting arms 26, 26.
The configuration is the same as that of the first embodiment except that it is caulked so that a V-shaped concave portion 34 that cuts into the flange 29 is formed. In FIG. Assign a sign.

According to this embodiment, the caulked portion (ie, V-shaped portion )
Since the concave portion 34) is spot-like, the coupling between the housing 2 and the valve body 15 and the rotation stop can be achieved with a relatively small caulking force.

In each of the above embodiments, various design changes can be made without departing from the gist of the present invention. For example, the solenoid valve 1 can be configured to be an open / close type.
Further, the female coupler 12 may be provided at the end of the housing 2 on the side opposite to the valve section.

[0030]

As described above, according to the first aspect of the present invention, the opening edge of the opening of the housing is connected to the mounting of the valve body.
By caulking around the arm, the portion of the opening facing the mounting arm is made non-caulked, and the front of the opening is
Form a swaged part with a flange at the part not facing the mounting arm.
Because, without the neck of the flange, or even which was extremely short, One avoiding interference with the attachment arm swaging tool and the valve bodyゝhousing and can perform caulking between the valve body, the solenoid This can contribute to shortening the overall length of the valve.

According to a second feature of the present invention, the length of the long side of the mounting arm of the valve body in the extension direction is substantially equal to the diameter of the flange, and the length of the short side is larger than the diameter of the flange. The flange is connected to the valve body via the neck, which has a substantially rectangular cross section, and the boundary between the caulked portion and the non-caulked portion at the opening of the housing engages the long side of the neck. As a result, the flange is connected to the valve body via the neck, but the neck is less susceptible to stress concentration due to the increase in cross-sectional area. Since the rotation is stopped, the connection between the two can be further strengthened.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a solenoid valve according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1;

FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1;

FIG. 5 is an exploded perspective view of a coupling portion between a housing and a valve body in the solenoid valve.

FIG. 6 is a perspective view similar to FIG. 5, showing a second embodiment of the present invention;

FIG. 7 is a perspective view similar to FIG. 5, showing a third embodiment of the present invention;

FIG. 8 is a plan view of a main part of a solenoid valve according to a third embodiment of the present invention.

9 is a view taken in the direction of arrow 9 in FIG. 8;

FIG. 10 is a plan view of a conventional solenoid.

[Explanation of symbols]

a caulking part b non-caulking part c boundary part C coupling structure S solenoid part V valve part 1 solenoid valve 2 housing 5 coil 6 fixed core 7 movable core 15 valve body 26 mounting arm 28 neck part 29 flange 30 thin cylinder part (opening part) ) 34 V-shaped concave part (caulking part)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 27/00-27/12 F16K 31/06-31/11

Claims (2)

(57) [Claims] 1. A solenoid (S) comprising a coil (5), a fixed core (6) and a movable core (7) in a bottomed cylindrical housing (2), and an opening in the housing (2). A valve body (17) operated by the movable core (7) is housed in a valve body (15) having a flange (29) at one end fitted and caulked to the part (30), and the valve body is provided. (15) A solenoid valve including a valve part (V) integrally formed with a mounting arm (26) extending radially outward from the outer peripheral surface of the housing (2). Caulking the opening edge of the opening (30) avoiding the mounting arm (26) of the valve body (15).
Therefore, the portion of the opening (30) facing the mounting arm (26) is a non-caulked portion (b), and the opening (3)
0), a flange is provided at a portion not facing the mounting arm (26).
(29) A solenoid valve, wherein a swaged portion (a, 34) is formed . 2. A valve body according to claim 1, wherein the length of the long side of the mounting arm of the valve body extending in the extending direction is substantially equal to the diameter of the flange. Flange (29) via neck (28) having a substantially rectangular cross section whose length is smaller than the diameter of flange (29)
Is connected to the valve body (5), and the boundary (c) between the caulked portion (a) of the opening (30) of the housing (2) and the flange (29) and the non-caulked portion (b) is attached to the neck. (2
8) A solenoid valve engaged with the long side surface.