CN215172639U

CN215172639U - Electromagnetic valve

Info

Publication number: CN215172639U
Application number: CN202120606662.9U
Authority: CN
Inventors: 汪国军; 孙广瑞; 唐润秋
Original assignee: Vitesco Automotive Wuhu Co Ltd
Current assignee: Vitesco Automotive Wuhu Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-14
Anticipated expiration: 2031-03-25

Abstract

The utility model relates to a solenoid valve, it includes shell and electromagnetic actuator unit, the electromagnetic actuator unit includes: a coil assembly disposed within the housing, the coil assembly including a bobbin and a coil wound on an outer circumferential surface of the bobbin; a stator disposed radially inward of the bobbin and adjacent to one end of the coil assembly; an armature assembly axially movably disposed within the housing; and a yoke arranged in the housing to partially enclose the coil assembly, the yoke comprising a first side wall and a second side wall spaced apart from each other and arranged side by side and a bottom wall connecting the two symmetrical side walls, such that the cross section of the yoke is U-shaped, wherein the first side wall and the second side wall are mirror-symmetrical with respect to a plane centrally perpendicular to the bottom wall, wherein the yoke is arranged in the solenoid valve such that an opening of the U-shape is directed radially outward of the coil, transverse to the axial direction.

Description

Electromagnetic valve

Technical Field

The present invention relates to a valve, in particular a valve for closing and opening a flow path, which can be actuated by means of an electromagnetic actuator unit.

Background

There has been a core part in an electromagnetic actuator unit of an electromagnetic valve constructed in such a manner that it is composed of a yoke of a hollow cylindrical shape made by a rolling process and upper and lower two-part stators in which a magnetic circuit is formed to achieve a suction function of the electromagnetic valve after energization, wherein the upper stator has a flange part to be assembled with the yoke.

However, the core part constructed in this way has the disadvantages of large number of parts, high requirement for fitting size, complex processing technique and high cost of parts, thereby resulting in high selling price of the whole product and low product competitiveness.

The utility model discloses aim at solving at least one of above technical problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a modified solenoid valve, this solenoid valve have structure and processing technology simple, the cooperation requires at least one of characteristics such as lower and price/performance ratio height.

For this purpose, the utility model provides a solenoid valve, solenoid valve includes shell and electromagnetic actuator unit, the electromagnetic actuator unit includes: a coil assembly disposed within the housing, the coil assembly including a bobbin and a coil wound on an outer circumferential surface of the bobbin; a stator disposed radially inward of the bobbin and adjacent to one end of the coil assembly; an armature assembly axially movably disposed within the housing; and a yoke arranged in the housing to partially enclose the coil assembly, the yoke comprising a first side wall and a second side wall spaced apart from each other and arranged side by side and a bottom wall connecting the two symmetrical side walls, such that the cross section of the yoke is U-shaped, wherein the first side wall and the second side wall are mirror-symmetrical with respect to a plane centrally perpendicular to the bottom wall, wherein the yoke is arranged in the solenoid valve such that an opening of the U-shape is directed radially outward of the coil, transverse to the axial direction.

Optionally, the first side wall of the yoke is provided with an aperture, and the stator is a cylindrical member having a closed first end coupled with the yoke via the first aperture and an open second end for receiving one end of the armature assembly.

Optionally, the diameter of the first end portion is smaller than the diameter of a body portion of the stator adjacent to the first end portion, thereby forming a shoulder portion adjacent to the first end portion on the stator, wherein the shoulder portion abuts against an inner surface of the bottom wall of the yoke to fit the stator and the yoke together.

Optionally, the second side wall of the yoke is provided with a notch for receiving the armature assembly.

Optionally, the armature assembly comprises a rod and an armature fixed to the rod, the rod being accommodated at one end in the stator and fixedly connected at the other end to the piston for closing and opening the flow path.

Optionally, the solenoid valve is a canister solenoid valve, a turbocharged solenoid pressure relief valve, or an exhaust gas recirculation solenoid valve.

The utility model provides a modified solenoid valve design from this for the flange part of original last stator or thin slice part and yoke are integrated to be one-piece structure, and use the yoke of the configuration of bending, utilize a wall portion of bending of yoke to replace original lower stator simultaneously, make part quantity reduce, and processing technology simplifies greatly, and the man-hour of processing obviously reduces, and the degree of difficulty and the required precision of parts machining are showing and are reducing, thereby can realize lower spare part cost relatively.

Drawings

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 schematically shows a solenoid valve according to an embodiment of the invention in a longitudinal sectional view.

Fig. 2 is a schematic perspective view of a stator according to an embodiment of the present invention.

Fig. 3 is a schematic perspective view of a magnetic yoke according to an embodiment of the present invention.

Detailed Description

The solenoid valve according to the present invention is described below with reference to the accompanying drawings and specific embodiments, which are intended to schematically illustrate and describe the technical solutions of the present invention, and do not constitute limitations of the present invention.

Fig. 1 shows a solenoid valve 100, which is illustrated in fig. 1 in a longitudinal section (i.e., a view parallel to the longitudinal axis of the solenoid valve). According to the utility model discloses a solenoid valve 100 can be used as carbon tank solenoid valve, turbo boost electromagnetism relief valve or exhaust gas recirculation solenoid valve.

The solenoid valve 100 comprises a housing 1. The housing 1 can have an integrally formed flange, by means of which the housing 1 can be connected to a further device, not shown, for example a turbocharger. In the housing 1 there is arranged an electromagnetic actuator unit comprising a coil assembly 2 and an axially movable armature assembly 5.

The coil block 2 includes a bobbin 21 and a coil 22 wound around an outer peripheral surface of the bobbin 21. The armature assembly 5 comprises a rod 51 and an armature 52 fixed to the rod. The rod 51, which may be made of metal, is axially movably supported in the housing 1 by means of an upper bearing 53 and a lower bearing 54 and is fixedly connected to the piston 8. The armature 52 is made of a magnetic material, such as a ferromagnetic material (e.g., iron).

When the electromagnetic actuator unit is energized, the coil 22 generates a magnetic field and magnetizes the stator 3, so that the stator 3 generates a magnetic attraction force, under the action of which the armature 52 moves axially in the direction of the housing 1 (i.e. upwards in fig. 1) and carries the rod 51 and thus also the piston 8 in the direction of the housing 1.

The spring 7 serves to urge the piston 8 axially in the direction of a valve seat, not shown, i.e. away from the housing 1 (i.e. downwards in fig. 1).

The electromagnetic actuator unit further comprises a stator 3. One end of the stator 3 adjacent to the coil block 2 is disposed radially inside the bobbin 21. The stator 3 is made of a magnetic material, such as a ferromagnetic material (e.g., iron).

A yoke 6 is also provided in the housing, partially enclosing the coil assembly 2. The yoke 6 includes a first side wall 61a and a second side wall 61b spaced apart from each other and juxtaposed, and a bottom wall 62 connecting the first side wall 61a and the second side wall 61b, and the first side wall 61a and the second side wall 61b may be mirror-symmetrical with respect to a plane centrally perpendicular to the bottom wall such that the yoke has a U-shaped cross section (see fig. 3). Further, as shown in fig. 3, the first side wall 61a of the yoke 6 may be provided with an opening 63, and the second side wall 61b is provided with a notch 64 for receiving the armature assembly 5. In the non-energized state of the electromagnetic actuator unit, the armature 52, which is fixedly connected to the lever 51, can be located in this recess 64. The yoke 6 is made of a magnetic material, such as a ferromagnetic material (e.g., iron).

As shown in fig. 1, the yoke 6 is arranged in the solenoid valve such that the U-shaped opening is directed radially outward of the coil 22 transversely to the axial direction.

As shown in fig. 2, the stator 3 may be a cylindrical member having a closed first end 31 and an open second end 32. The first end 31 may be coupled with the yoke 6 via the opening 63, e.g. pressed or snap-fitted into the opening 63. The second end 32 is adapted to receive an end of the armature assembly 5. A stepped bore 35 is provided in the second end 32, and when the electromagnetic actuator unit is energized, the armature 52 and the rod 51 together with the piston 8 move with the armature 52 in the direction of the housing 1, whereby a portion of the armature 52 enters the stepped bore 35.

As shown in fig. 1 and 2, the diameter of the first end portion 31 is smaller than the diameter of the main body portion 33 of the stator 3 adjacent to the first end portion, so that a shoulder portion 34 adjacent to the first end portion 31 is formed on the stator 3. The shoulder portion 45 abuts against the inner surface of the bottom wall 62 of the yoke 6 to facilitate the assembly of the stator 3 with the yoke 6.

In summary, the non-limiting embodiment shown in fig. 1 to 3 uses a U-shaped yoke in combination with a cylindrical stator having a closed bottom end to form an electromagnetic circuit, and one component, namely, a lower stator, is omitted. Therefore, according to the utility model discloses a solenoid valve compares in traditional solenoid valve including the fashioned hollow cylinder yoke of edge rolling, and technology is simpler, and is lower to the machining precision of part and complex requirement, and processing is less during with, does not need complicated edge rolling equipment and machining equipment to simplified technology, reduced man-hour, and reduced part cost.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited thereto. Various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is to be determined by the appended claims.

List of reference numerals:

100 solenoid valve

1 outer cover

2 coil component

21 coil rack

22 coil

3 stator

31 first end part

32 second end portion

33 main body part

34 shoulder part

35 stepped bore

5 armature assembly

51 rod

52 armature

53 Upper bearing

54 lower bearing

6 magnetic yoke

61a first side wall

61b second side wall

62 bottom wall

63 open pores

64 gap

7 spring

8 piston

Claims

1. A solenoid valve (100) comprising a housing (1) and an electromagnetic actuator unit, the electromagnetic actuator unit comprising:

a coil assembly (2) disposed within the housing, the coil assembly including a bobbin (21) and a coil (22) wound on an outer peripheral surface of the bobbin;

a stator (3) disposed radially inward of the bobbin and adjacent to one end of the coil assembly;

an armature assembly (5) axially movably arranged within the housing; and

a yoke (6) arranged within the housing to partially enclose the coil assembly, the yoke comprising a first side wall (61a) and a second side wall (61b) spaced apart from each other and arranged side by side, and a bottom wall (62) connecting the first side wall and the second side wall, such that the yoke has a U-shaped cross-section, wherein the first side wall and the second side wall are mirror-symmetrical with respect to a plane centrally perpendicular to the bottom wall,

wherein the yoke is arranged in the solenoid valve such that the opening of the U is directed radially outside the coil transversely to the axial direction.

2. The solenoid valve according to claim 1, characterized in that the first side wall (61a) of the yoke (6) is provided with an opening (63), the stator (3) being a cylindrical member having a closed first end (31) and an open second end (32), wherein the first end (31) is coupled to the yoke via the first opening, the second end (32) being intended to receive one end of the armature assembly (5).

3. The solenoid valve according to claim 2, characterized in that the diameter of the first end (31) is smaller than the diameter of the body portion (33) of the stator (3) adjacent to it, so as to form on the stator a shoulder (34) adjacent to the first end, which abuts against the inner surface of the bottom wall (62) of the yoke (6) to fit the stator and the yoke together.

4. A solenoid valve according to claim 1, characterised in that the second side wall (61b) of the yoke (6) is provided with a notch (64) for receiving the armature assembly (5).

5. A solenoid valve according to any one of claims 1 to 4, characterised in that the armature assembly (5) comprises a rod (51) and an armature (52) fixed to the rod, the rod being housed in the stator (3) at one end and being fixedly connected to the piston (8) for closing and opening the flow path at the other end.

6. The solenoid valve according to any one of claims 1 to 4, characterized in that it is a canister solenoid valve, a turbo-charged solenoid relief valve or a gas recirculation solenoid valve.