CN109882637B

CN109882637B - Electromagnetic valve, automobile seat with same and automobile door

Info

Publication number: CN109882637B
Application number: CN201711319018.8A
Authority: CN
Inventors: 龚红宇; 冯臣; 陈家辉; 陈静
Original assignee: Guangdong Zhaoqing L&V Co Ltd
Current assignee: Guangdong Zhaoqing L&V Co Ltd
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2020-10-09
Anticipated expiration: 2037-12-12
Also published as: CN109882637A; WO2019114557A1

Abstract

The invention discloses a solenoid valve, which comprises a shell, wherein the shell is provided with: a coil that generates a magnetic field when energized; a stationary core fixedly mounted relative to the coil and within the magnetic field; the movable iron core moves relative to the coil under the action of the magnetic field and is attracted with the static iron core; one of the static iron core and the movable iron core is provided with a convex part, and the other one of the static iron core and the movable iron core is provided with a groove matched with the convex part; and the convex part is positioned in the groove in at least partial stroke of the moving iron core moving process to the static iron core. The invention also relates to a vehicle seat and a vehicle door having the solenoid valve. Compared with the prior art, the invention has a plurality of beneficial effects, such as providing greater electromagnetic driving force efficiency.

Description

Electromagnetic valve, automobile seat with same and automobile door

Technical Field

The invention relates to the field of electric control, in particular to an electromagnetic valve and an automobile seat using the electromagnetic valve to implement specific control.

Background

In the prior art, solenoid valves are generally provided with a housing in which a coil is arranged for generating a magnetic field when energized. Fig. 10 and 11 of the present specification illustrate schematic diagrams of a typical solenoid valve in the prior art, wherein coil windings are not shown for the sake of simplicity, and are only illustrated by a coil bobbin. The coil has a through shaft hole in which a movable iron core is disposed to be movable therein. In addition, a static iron core is fixedly installed at one end of the shell. In a normal case, the movable core is ejected out of the housing by a spring arranged at one of the ends of the housing, so that the movable core is spaced apart from the stationary core by a certain distance, see fig. 10. After the coil is electrified, electromagnetic attraction can be generated between the movable iron core and the static iron core to drive the movable iron core to overcome the acting force of the spring. When the movable iron core finally moves to be jointed with the static iron core under the action of the magnetic field and the static iron core, the movable iron core and the static iron core have the maximum adsorption force and are tightly adsorbed together, and the movable iron core and the static iron core are shown in figure 11.

Such solenoid valves are often used in the automotive field for electrically controlling vehicle components, such as electric seat controls, electric door controls, etc. In this case, the solenoid valve is used as a power mechanism, and the movable core thereof is connected to the control actuator, so that the operating position, state, and the like of the seat or the door can be finally controlled by controlling the on/off of the current.

Disclosure of Invention

The object of the present invention is to provide an improved solenoid valve in view of the above prior art, which is capable of providing a larger driving force with the same volume or power consumption.

To this end, the solenoid valve according to the invention comprises a housing on which are arranged: a coil that generates a magnetic field when energized; a stationary core fixedly mounted relative to the housing and within the magnetic field; the movable iron core is arranged to move under the attraction of the static iron core in the magnetic field and attract the static iron core; one of the static iron core and the movable iron core is provided with a convex part, and the other one of the static iron core and the movable iron core is provided with a groove matched with the convex part; and the convex part is positioned in the groove in at least partial stroke of the moving iron core moving process to the static iron core.

Compared with the prior art, the movable iron core has larger electromagnetic driving force. Therefore, the electromagnetic valve can be driven by smaller current, and serious heating of the electromagnetic valve is avoided. Alternatively, the coil and other solenoid valve mechanisms may be designed to be smaller to provide the same driving force, improving the driving efficiency of the solenoid valve.

Preferably, at the beginning of the moving process of the movable iron core towards the stationary iron core, the end surface of the convex part and the opening of the groove are at the same stroke position. When the end face of the static iron core convex part and the opening of the movable iron core groove are located on the same plane, the static iron core convex part has the largest suction force to the movable iron core, so that the driving force of the electromagnetic valve during starting is effectively increased.

Preferably, the convex portion extends on the stationary core along an axis.

Preferably, the groove extends on the plunger along an axis.

Preferably, the static iron core and the movable iron core are coaxially arranged.

Preferably, the convex part is a column body with a constant section.

Preferably, the convex part of the static iron core and the concave groove of the movable iron core have the same cross-sectional dimension.

Preferably, the convex portion includes a first section and a second section extending from the first section, and the cross-sectional area of the first section is larger than that of the second section.

In another aspect, the invention also relates to an automobile seat, which comprises a pneumatic massage system, wherein an air charging and discharging switch of the pneumatic massage system comprises the electromagnetic valve.

In another aspect, the invention also relates to a vehicle seat comprising a seat folding system, the folding switch of which comprises the above-described solenoid valve according to the invention.

In a further aspect, the invention also relates to a vehicle door comprising a door lock system comprising the above-described solenoid valve according to the invention.

Drawings

Further details and advantages of the present invention will become apparent from the detailed description provided hereinafter. The following detailed description will be made with reference to the accompanying drawings, in which:

FIG. 1 illustrates a perspective view of an exemplary solenoid valve according to the present disclosure;

FIG. 2 is an exploded perspective view of the solenoid valve shown in FIG. 1;

FIG. 3 is a perspective view of the solenoid valve of FIG. 1 when not energized;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic perspective view of the solenoid valve of FIG. 1 when energized closed;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a schematic perspective view of a stationary core of the solenoid valve of FIG. 1;

FIG. 8 is an alternative embodiment of the stationary core shown in FIG. 7;

FIG. 9 is another alternative embodiment of the stationary core shown in FIG. 7;

FIG. 10 shows a schematic cross-sectional view of a typical solenoid valve of the prior art, in an unenergized state;

FIG. 11 is a schematic cross-sectional view of the solenoid valve of FIG. 10 when energized closed;

fig. 12 is a graph comparing the electromagnetic force test of the solenoid valve according to the present invention and the solenoid valve of the prior art shown in fig. 10 and 11.

The drawings described above are for illustration and example only and are not necessarily to scale, nor are they intended to depict all of the components or details relevant to the particular environment of use. Those skilled in the art will appreciate that the conception and specific use of the disclosure may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention.

Detailed Description

The terms "first," "second," and the like, as may be used in the following description, are not intended to limit any order, but merely distinguish between various separate components, features, structures, elements, and the like, which may be the same, similar, or different. Meanwhile, descriptions about orientations, such as "upper", "lower", "inner", "outer", "left", "right", "radial", "axial", and the like, which may be used in the following description, are only for convenience of description unless explicitly stated, and are not intended to form any limitation on the technical solution of the present invention.

Fig. 1 and 2 show in perspective view an assembled view and an exploded view, respectively, of a particular solenoid valve according to the invention. The solenoid valve comprises a housing 10, within which housing 10 a coil 20 is arranged for generating a magnetic field when energized. The coil 20 has a shaft hole therethrough. In order to make the view content more concise and clear, the complex coil winding is not drawn in the figure, and is only illustrated by the coil framework. The coil 20 has a circular cross-section and the housing 10 is correspondingly generally cylindrical to cooperate to form a more compact structure, although coils and housings having other configurations are contemplated in certain circumstances.

The coil 20 is provided with a plunger 40 at a first end portion above the orientation shown in the drawing. The plunger 40 includes a generally circular rod-shaped body and a flange 41 at one end of the body. The rod body is inserted into the coil axial bore from the first end of the coil 20. The rod body of the plunger 40 has a sectional size matched with the coil shaft hole to be movable therein. Furthermore, a spring 50 is sleeved on the rod body of the movable iron core 40, one end of the spring 50 abuts against the first end part of the coil 20, and the other end abuts against the movable iron core flange. It will be appreciated that the flange may also have a different configuration than that shown in the figures and may be provided at a non-end position of the plunger rod body.

The coil 20 has a stationary core 30 fixedly disposed on a second end portion opposite to the first end portion. The stationary core 30 includes a disk body having a substantially disk shape, and a protrusion 60 extends from the disk surface of the disk body facing the movable core rod. The projection 60 extends into the axial hole of the coil 20 and opposes the rod body of the plunger 40 which also extends into the axial hole. In cooperation with the protrusion 60, the rod body of the plunger 40 is provided with a groove 70 on an end surface facing the protrusion 60. During operation of the solenoid valve, the plunger 40 moves toward the stationary core 30, and the protrusion 60 is received in the recess 70. Alternatively, the protrusion 60 may be provided on the movable core 40, and the recess 70 may be provided on the stationary core 30.

Fig. 3-6 show the de-energized and energized states of the solenoid valve according to the present invention. As shown in fig. 3 and 4, when the coil is not energized, the spring 50 applies pressure to the flange of the movable core 40, so that the lower end surface of the rod body of the movable core 40 is spaced apart from the upper end surface of the disk body of the stationary core 30 by a certain distance. With continued reference to fig. 5 and 6, after the coil is energized, the plunger 40 moves along the coil axis hole toward the stationary core 30 against the pressure of the spring 50 under the driving of the electromagnetic field generated by the coil 20. During the movement of the movable core 40 toward the stationary core 30 within the coil axial bore, the protrusion 60 of the stationary core 30 is received in the recess 70 of the movable core 40. Finally, when the movable core 40 finally moves to abut against the stationary core 30 by the dual action of the coil magnetic force and the stationary core magnetic force, the two have the maximum attraction force and are tightly attracted together.

In the process of moving the movable core 40 toward the stationary core 30, the stationary core suction force applied to the movable core 40 includes the suction force of the convex portion 60 on the stationary core plate in addition to the suction force of the stationary core 30 plate. In particular, it can be seen from fig. 4 that at the beginning of the movement of the plunger 40 towards the stationary core 30, i.e. at the start of the solenoid valve, the end face 61 of the protrusion 60 of the stationary core 30 is located at the same stroke position, i.e. in the same plane, as the opening 71 of the recess 70. At this time, the convex portion 60 and the plunger 40 have a larger suction force therebetween, thereby effectively increasing the driving force of the solenoid valve at the time of start-up. It will be understood that, in addition to the preferred embodiment shown in the figures, the length of the protrusion 60 may be set longer or shorter, so that the end surface 61 of the protrusion 60 of the stationary core 30 and the opening 71 of the recess 70 are not located at the same stroke position at the beginning of the moving process of the movable core 40 toward the stationary core 30. Correspondingly, the depth of the recess 70 in the plunger 40 must be sufficient to accommodate the protrusion 60 to allow the plunger 40 to eventually engage the stationary core 30 and be tightly held together with maximum attraction.

Fig. 7 is a perspective view of the stationary core of fig. 1, from which it can be seen that the projection 60 is generally cylindrical and extends axially from the plate of the stationary core 30. For this purpose, the recess 70 on the plunger 40 is correspondingly arranged to extend axially on said plunger 40. The convex portion may be provided in other forms than that shown in fig. 7, such as a prism shape shown in fig. 8, and may be provided in a step shape as shown in fig. 9, including a first section 62 and a second section 63 extending from the first section 62, and the cross-sectional area of the first section 62 is larger than that of the second section 63.

The significant advantages of the solenoid valve of the present invention over the prior art shown in fig. 10-11 will be further explained below by the electromagnetic force test chart of fig. 12. Fig. 12 separately performs an electromagnetic force test for a particular solenoid valve according to the present invention and a prior art solenoid valve according to fig. 10-11. For carrying out the test, all set up 5mm with the operating stroke of the moving iron core of solenoid valve, also move until moving iron core and quiet iron core actuation from coil circular telegram drive moving iron core towards quiet iron core, move the iron core and need remove 5mm, in other words, set up the relative terminal surface distance of moving the iron core body of rod and quiet iron core disk body to 5 mm. Further, in the present invention, both the length of the convex portion of the stationary core and the depth of the groove of the movable core are set to 3 mm. The coils of the two solenoid valves are energized, the movable iron core moves toward the stationary iron core in the coil axial hole, and the electromagnetic force applied to the movable iron core in the total 5mm stroke is measured, and the electromagnetic force test chart is drawn as shown in fig. 12.

As can be seen from fig. 12, the plunger of the solenoid valve according to the present invention has a greater electromagnetic force than the prior art during most of the entire stroke. In particular, when the stroke position of the plunger is 3mm, that is, the end surface 61 of the protrusion 60 of the stationary core 30 and the opening 71 of the recess 70 of the plunger 40 are located at the same stroke position, that is, on the same plane, in the present invention, the electromagnetic force applied to the plunger 40 of the solenoid valve according to the present invention is significantly greater than that of the prior art. For this reason, the solenoid valve may be configured such that when it is activated, the end surface 61 of the convex portion 60 of the stationary core 30 is located at the same stroke position, i.e., on the same plane, as the opening 71 of the recess 70 of the movable core 40, so that the solenoid valve has a larger driving force when it is activated.

The solenoid valve according to the invention can be used in a variety of applications, such as in a car seat. In particular, the solenoid valve according to the present invention may be used in a pneumatic massage system of an automobile seat, and an air charge and discharge switch of the pneumatic massage system may be driven by the solenoid valve. Alternatively, the solenoid valve may be used for a seat folding system of an automobile, and a folding switch of the seat folding system may be driven by the solenoid valve. In various applications, the movable iron core of the solenoid valve is usually connected to an actuator such as an electric seat or a door, and the operating position or state of the seat or the door can be finally controlled by controlling the on/off of the current of the solenoid valve.

The foregoing description is only exemplary of the principles and spirit of the invention. It will be appreciated by those skilled in the art that changes may be made in the described examples without departing from the principles and spirit thereof, and that such changes are contemplated by the inventors and are within the scope of the invention as defined in the appended claims.

Claims

1. A solenoid valve comprising a housing (10), the housing (10) having disposed thereon:

a coil (20), the coil (20) generating a magnetic field when energized;

a stationary core (30), the stationary core (30) being fixedly mounted relative to the coil (20) and being within the magnetic field; and

the movable iron core (40) moves relative to the coil (20) under the action of the magnetic field and is attracted with the static iron core (30);

the method is characterized in that:

one of the static iron core (30) and the movable iron core (40) is provided with a convex part (60), and the other one is provided with a groove (70) matched with the convex part (60); and is

The convex part (60) is positioned in the groove (70) in at least part of the stroke of the movable iron core (40) moving towards the static iron core (30);

the static iron core and the movable iron core are arranged in such a way that when the electromagnetic valve is started, the end surface (61) of the convex part (60) of the static iron core (30) and the opening (71) of the groove (70) of the movable iron core (40) are positioned on the same plane.

2. The solenoid valve according to claim 1, wherein: the convex portion (60) extends on the stationary core (30) along an axis.

3. The solenoid valve according to claim 1, wherein: the groove (70) extends axially on the plunger (40).

4. A solenoid valve according to claim 2 or 3, wherein: the static iron core (30) and the movable iron core (40) are coaxially arranged.

5. The solenoid valve according to claim 1, wherein: the convex part (60) is a column body with a uniform cross section.

6. The solenoid valve according to claim 1, wherein: the convex portion (60) includes a first section (62) and a second section (63) protruding from the first section (62), and the cross-sectional area of the first section (62) is larger than the cross-sectional area of the second section (63).

7. An automobile seat comprising a pneumatic massage system, characterized in that the charge and discharge switches of the pneumatic massage system comprise a solenoid valve according to any one of claims 1 to 6.

8. A car seat comprising a seat folding system, characterized in that a folding switch of the seat folding system comprises a solenoid valve according to any one of claims 1-6.

9. A vehicle door comprising a door lock system, characterized in that the door lock system comprises a solenoid valve according to any one of claims 1-6.