Plastic package stator and electromagnetic valve using same

Abstract

The utility model relates to a plastic package stator with a waterproof sleeve formed by injection molding by taking a stator assembly part as an insert. The stator assembly part comprises a coil framework, a coil, a magnetic conductive inner sleeve, a magnet yoke and a plastic package shell wrapping the coil and the magnet yoke, the waterproof sleeve comprises a waterproof sleeve body wrapping the inner hole wall of the magnetic conductive inner sleeve and a waterproof sleeve base extending outwards. The magnet yoke is provided with an upper end plate facing the upper flange and provided with a first through hole, the upper flange is provided with a groove with the end face tightly attached to the upper end plate, the plastic package shell is provided with an upper end part wrapping and attaching the upper end plate and provided with a second through hole, and the waterproof sleeve base wraps and attaches the upper end part; the groove, the first through hole and the second through hole are at least partially overlapped along the axial projection of the sleeve and are communicated to form a cavity; the surface of the groove, which is close to the lower side contour projection line of the upper end plate, at least partially exceeds the surface of the first through hole, which is enclosed by the lower end surface contour projection line of the upper end plate; the plastic filling cavity which forms the waterproof sleeve through injection molding forms an inverted buckle which is integrated with the waterproof sleeve base, and the waterproof sleeve base is firmly riveted with the upper end part and the upper end plate and is not easy to peel off.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic package stator, especially an electromagnetic valve applying the plastic package stator, and the IPC classification belongs to F16K31 / 06. BACKGROUND

[0002] The structure of the existing stator applied to the electromagnetic valve, as shown in patent publication No. CN111928007B and CN218818494U, comprises a stator assembly part with a magnetic guide inner sleeve, in order to improve the magnetic performance of the electromagnetic valve, a water isolation sleeve with a relatively thin wall thickness is usually injection molded on the inner wall of the magnetic guide inner sleeve of the stator assembly part. When the existing stator assembly part injection molds the water isolation sleeve with an integrated water isolation sleeve base structure, there is a slight peeling problem between the water isolation sleeve base and the plastic package shell (plastic package layer) of the coil winding, which further causes water vapor to penetrate into the coil, affecting the use reliability of the electromagnetic valve. Therefore, there is a need for improvement.

[0003] For relevant terms and knowledge, refer to "Low Voltage Electrical Apparatus Design Manual" (Mechanical Industry Press 1992 1st edition), "Valve Manual - Selection" (Chemical Industry Press 2013 1st edition), "IEC Electrical and Electronic Standard Terminology Dictionary" (China Standard Press 1992 1st edition), "Electrical Appliance Manufacturing Technology" (Mechanical Industry Press 1982 1st edition), "Mechanical Engineering Manual" and "Electrical Engineering Manual" (Mechanical Industry Press 1978 1st edition and 1997 2nd edition), GB14536.9 "Special Requirements (Including Mechanical Requirements) for Household and Similar Use Electric Automatic Controller Electric Water Valve", GB / T21465-2008 "Valve Terminology", QB / T 1291 "Water Inlet Electromagnetic Valve for Automatic Washing Machine". UTILITY MODEL CONTENT

[0004] The utility model aims at providing a plastic package stator, through the water isolation sleeve base one-piece forming reverse buckle for riveting the magnetic yoke end plate and the plastic package shell, solve the technical problem that the water isolation sleeve base and the coil winding plastic package shell slightly peel apart.

[0005] The technical scheme of the utility model is a plastic package stator with a stator assembly part as an insert injection molding to form a water isolation sleeve, the stator assembly part comprises a coil skeleton with a sleeve and upper and lower flanges, a coil winding surrounding the sleeve and limited to the upper and lower flanges at both ends, a magnetic guide inner sleeve sleeved in the hollow hole of the sleeve, a magnetic yoke installed on the outer periphery of the coil skeleton and connected with the magnetic guide inner sleeve, and a plastic package shell formed by injection molding covering the outer periphery of the coil winding and the magnetic yoke.

[0006] The plastic sealing stator further comprises a water-proof sleeve formed by insert injection molding of the stator assembly, the water-proof sleeve comprises a water-proof sleeve pipe body wrapped on the inner hole wall of the magnetic conductive inner sleeve and a water-proof sleeve base radially extended out of the opening end of the water-proof sleeve pipe body; the magnetic yoke has an upper end plate meeting the upper side of the upper flange, the upper end plate is provided with a first through hole, the upper side of the upper flange is provided with a groove with an end face abutting the lower end face of the upper end plate, the plastic sealing shell has an upper end part wrapped on the upper end face of the upper end plate, the upper end part is provided with a second through hole, and the water-proof sleeve base is wrapped on the upper surface of the upper end part;

[0007] The groove, the first through hole and the second through hole at least partially overlap along the axial projection of the sleeve and are penetrated through;

[0008] Along the axial projection of the sleeve, the projection line of the profile of the lower side of the upper end plate is enclosed by the face of the groove, and the face of the first through hole at the profile of the lower end face of the upper end plate is at least partially exceeded;

[0009] When the water-proof sleeve is injection molded, the cavity penetrated through by the groove, the first through hole and the second through hole is filled with plastic to form a reverse buckle integrated with the water-proof sleeve base.

[0010] The reverse buckle formed in this way is integrally formed with the water-proof sleeve base and the water-proof sleeve pipe body, and the reverse buckle is firmly buckled with the upper end part of the plastic sealing shell and the upper end plate of the magnetic yoke and is not easy to be peeled off, so that water vapor is prevented from penetrating into the coil.

[0011] Further, the groove is a circular blind hole, the first through hole is a circular through hole, the axes of the groove and the first through hole are collinear, and the reverse buckle is in the shape of a rivet, so that the manufacturing process is simple and the cost is low.

[0012] Further, the groove is square and the first through hole is square, so that the volume, strength and firmness of the formed reverse buckle can be increased.

[0013] Further, the axial sectional view of the first through hole of the magnetic yoke is in the shape of a taper with the upper part being narrow and the lower part being wide, so that the reverse buckle connecting part formed by injection molding of the first through hole also has a certain anti-falling-off effect, and the buckling firmness is further improved.

[0014] Further, the upper side of the upper flange is provided with a platform abutting the upper end plate, and the groove is arranged in the platform, so that the depth of the groove can be deepened, and the volume, strength and firmness of the reverse buckle can be increased.

[0015] The utility model discloses still disclose a kind of solenoid valve: including opening and closing piece, valve body with valve seat and above any one plastic sealing stator, the water-proof sleeve is sealedly connected with valve body and is formed with valve body Pressure chamber.

[0016] The solenoid valve of the utility model, by improving the structure of plastic sealing stator, its coil sealing performance is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the plastic package stator of the utility model;

[0018] Figure 2 is Figure 1 the main sectional view of the plastic package stator;

[0019] Figure 3 is Figure 1 the top view of the plastic package stator;

[0020] Figure 4 is Figure 1 the coil former perspective view of the plastic package stator;

[0021] Figure 5 is Figure 1 the magnetic yoke perspective view of the plastic package stator;

[0022] Figure 6 is Figure 1 the main sectional view of the stator assembly in the plastic package stator;

[0023] Figure 7 is Figure 1 the top view of the stator assembly in the plastic package stator;

[0024] Figure 8 is Figure 7 the contour of the recess close to the lower side of the upper end plate and the contour of the first through hole on the lower end surface of the upper end plate along the axial projection of the sleeve are projected in a projection relationship;

[0025] Figure 8a is Figure 7 the contour of the recess close to the lower side of the upper end plate and the contour of the first through hole on the lower end surface of the upper end plate along the axial projection of the sleeve are projected in another projection relationship;

[0026] Figure 9 is the main sectional view of the electromagnetic valve of the utility model.

[0027] Reference signs:

[0028] Plastic package stator 100;

[0029] Coil former 110, upper flange 111, blind hole (recess) 1111, platform 1112, lower flange 112, sleeve 113, hollow hole 114;

[0030] Coil winding 120;

[0031] Magnetic yoke 130, upper end plate 131, first through hole 1311, lower end plate 132;

[0032] Magnetic conducting inner sleeve 140;

[0033] Plastic seal 150, upper end 151, second through hole 1511, lower end 152;

[0034] Stator assembly 101, first cavity 1, second cavity 2;

[0035] Waterproof sleeve 160, waterproof sleeve base 161, inverted buckle 1611, inverted buckle connecting part 1612, waterproof sleeve body 162;

[0036] Valve body 20, valve seat 21, valve cavity 11, spring 30, opening and closing element 40, movable iron core 41, pilot hole rubber plug 42, valve plug 43, valve plug rubber 44. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.

[0038] This utility model improves the existing plastic-encapsulated stator structure of solenoid valves, mainly by integrally forming the water-proof sleeve base with an inverted snap-fit ​​for riveting the magnetic yoke end plate and the end of the plastic-encapsulated shell. The basic structure and working principle of solenoid valves are common knowledge in the field and have been described in Chinese patent documents CN220505949U and CN215059850U. This utility model inherits the relevant structure and working principle therein, and will not be repeated in this specification.

[0039] The terms "center," "inner," "outer," "upper," and "lower" used in the text are based on Figure 2 and Figure 6 The indicated orientation or positional relationship Figure 2 and Figure 6 The centerline is the central axis of the coil frame sleeve 113, i.e., the center. "Upper" and "lower" can be interchanged. The term "through hole" refers to a hole that passes through the end of a part or end plate. The terminology used is the coil frame, sleeve, and flange from the "Low Voltage Electrical Appliance Design Manual", as well as the water-proof sleeve, water-proof sleeve body, water-proof sleeve base, and magnetic inner sleeve from Chinese patent document CN218818494U. The plastic sealing layer described in CN218818494U and CN111928007B is equivalent to the plastic sealing shell described in the embodiment of this utility model.

[0040] Example

[0041] like Figures 1-8aAs shown, the utility model discloses a kind of plastic package stator 100 with stator assembly 101 as insert injection molding formation water jacket 160, stator assembly 101 includes coil skeleton 110, coil winding 120, magnetic yoke 130, 2 piece magnetic conductive inner sleeve 140, plastic package shell 150, wherein, sleeve 113 in the center of coil skeleton 110 is cylindrical, two end flanges are upper flange 111 and lower flange 112, coil winding 120 is limited to around the outer periphery of sleeve 113 by two end flanges 111 / 112, 2 piece magnetic conductive inner sleeve 140 is limited to the hollow hole 114 in the middle section of sleeve 113 with two ends in the hollow hole 114 with sleeve;Magnetic yoke 130 is installed on the outer periphery of coil skeleton 110 and is provided with upper end plate 131 and lower end plate 132 respectively with the upper side of upper flange 111 and the lower side of lower flange 112 meet, the two end plates 131 / 132 are respectively opened in the center and are closely connected with the outer periphery of two end magnetic conductive inner sleeve 140;Along the axial direction of sleeve 113, upper flange 111 upper side convex platform 1112 is closely attached to the lower end surface of upper end plate 131, blind hole 1111 is provided in platform 1112, the upper end plate 131 of magnetic yoke is provided with the first through hole 1311 coaxial with blind hole 1111, and the hole diameter is less than blind hole 1111, and the first cavity 1 of inverted counterbore shape (or round head rivet shape) of upper layer wide, lower layer narrow is formed by the through.

[0042] By injection molding the outer periphery of coil winding 120 and magnetic yoke 130 to form plastic package shell 150 to make stator assembly 101, plastic package shell 150 includes upper end 151 and lower end 152 respectively closely adhering to cover upper end surface of upper end plate 131 and lower end surface of lower end plate 132, when injection molding, first through hole 1311 is inserted by mold protruding portion to prevent high pressure molten plastic overflow into first cavity 1, and second through hole 1511 is formed through upper end 151 by the mold protruding portion, the mold protruding portion is cylindrical with the same diameter as first through hole 1311, so that the second through hole 1511 and first through hole 1311 center line are collinear, and the diameter is same, blind hole 1111, first through hole 1311, second through hole 1511 at least partially overlap along sleeve axial projection and form second cavity 2 of inverted counterbore shape (or round head rivet shape) of lower layer wide, middle layer narrow, upper layer and middle layer wide narrow same along sleeve axial through.

[0043] The stator assembly 101 is put into the mold as an insert, and the plastic is injected to form the waterproof sleeve 160 to make the plastic-sealed stator 100. The waterproof sleeve 160 includes a waterproof sleeve body 162 wrapped on the inner hole wall of the magnetically conductive inner sleeve 140, and a waterproof sleeve base 161 formed by wrapping the upper end part 151 of the plastic-sealed shell and closely adhering to the upper surface shape of the upper end part 151 radially outward from the opening end of the waterproof sleeve body 162. When the molten plastic enters the second cavity 2 during injection molding, a round head rivet-shaped undercut 1611 is formed from the waterproof sleeve base 161 to the upper end plate 131 of the rivet yoke, which is integrally formed with the waterproof sleeve base 161, the waterproof sleeve body 162, and the upper end plate 131 of the rivet yoke. The waterproof sleeve base 161 is riveted firmly to the upper end part 151 of the plastic-sealed shell and the upper end plate 131 of the rivet yoke, and is not easily peeled off, thereby avoiding water vapor from entering the coil.

[0044] When the thickness of the upper flange 111 is sufficient, the platform 1112 can not be provided, and the blind hole 1111 can be directly formed on the upper flange 111.

[0045] The blind hole 1111 can also be replaced by a groove 1111 in the form of a square, a cross, or a five-pointed star, and the like. Figure 8a As shown in the axial projection along the coil framework sleeve 113, as long as the face enclosed by the projection line of the groove 1111 close to the lower side contour of the upper end plate 131 at least partially exceeds the face enclosed by the projection line of the first through hole 1311 on the lower end surface contour of the upper end plate 131, the undercut 1611 can be formed to rivet the waterproof sleeve base 161 to the upper end part 151 of the plastic-sealed shell and the upper end plate 131 of the rivet yoke firmly and not peeled off. It should be noted that the gap of the groove 1111 close to the lower end surface of the upper end plate 131 is preferably not overflowed into the first cavity 1 when the plastic-sealed shell 150 is formed by injection molding, so as to avoid overflowed plastic occupying the cavity.

[0046] The second through hole 1511 with the same diameter as the first through hole 1311 and the same center line can be replaced by through holes that are not collinear and have different inner diameters. The circular shape can be replaced by a square, an oval, and various special shapes. As long as the groove 1111, the first through hole 1311, and the second through hole 1511 at least partially overlap axially, the plastic can be injected to form the undercut 1611 during injection molding.

[0047] The first through hole 1311 on the upper end plate 131 of the rivet yoke is designed as a tapered shape with a narrow upper part and a wide lower part in the axial cross-sectional view, and the undercut connecting part 1612 formed by injection molding in the first through hole further enhances the fastening firmness of the undercut 1611.

[0048] The utility model discloses still disclose a kind of electromagnetic valves, the electromagnetic valve includes the above-mentioned plastic package stator 100, valve body 20 with valve seat 21, water jacket base 161 is connected with valve body 20 and constitutes the valve cavity 11 including pressure cavity, still include reset spring 30 and movable core 41 installed in water jacket pipe body 162, set in the pilot hole rubber plug 42 of movable core 41 axial one end, valve plug 43, and valve seat 21 tightly adhere valve plug rubber 44 etc.

[0049] Shut open 40 is replaced with the movable core and the circular plate valve plug of the relative embedding setting shown in the figure 47.2-51 of the 47-68 pages of the 1st edition of "Electrical Machinery Engineering Handbook Volume 8" of Mechanical Industry Press 1982, or be replaced with the linkage setting core and flow channel sealing element described in CN215059850U, the plastic package stator 100 of above-mentioned can be applied to direct-acting electromagnetic stop valve.

[0050] The utility model discloses an electromagnetic valve, by improving the structure of plastic package stator, forms to buckle with plastic package shell end, magnet yoke end plate rivet firm and does not peel off, so that its coil winding sealing performance is promoted.

[0051] Although the specific embodiments of the utility model have been shown and described, those skilled in the art can understand that: without departing from the principles and purposes of the utility model, various changes, modifications, replacements and superimpositions can be carried out to the described embodiments, and the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A plastic-encapsulated stator, comprising a stator assembly (101), the stator assembly (101) comprising a coil bobbin (110) having a sleeve (113) and an upper flange (111) and a lower flange (112), a coil winding (120) surrounding the sleeve (113) and confined at both ends to the upper flange (111) and the lower flange (112), a magnetically conductive inner sleeve (140) fitted into a hollow hole (114) of the sleeve (113), and a magnetically conductive inner sleeve (140) mounted on the outer periphery of the coil bobbin (110) and connected to the magnetically conductive inner sleeve. The magnetic inner sleeve (140) is connected to a magnetic yoke (130), and a plastic encapsulation shell (150) is injection molded and formed on the outer periphery of the coil winding (120) and the magnetic yoke (130); it also includes a water-proof sleeve (160) injection molded with the stator assembly (101) as an insert, the water-proof sleeve (160) including a water-proof sleeve tube body (162) covering the inner wall of the magnetic inner sleeve (140) and a water-proof sleeve base (161) extending radially outward from the open end of the water-proof sleeve tube body (162); characterized in that: —The magnetic yoke (130) has an upper end plate (131) facing the upper side of the upper flange (111), the upper end plate (131) is provided with a first through hole (1311), and the upper side of the upper flange (111) is provided with a groove (1111) whose end face is closely attached to the lower end face of the upper end plate (131); the plastic seal (150) has an upper end part (151) that covers and fits the upper end face of the upper end plate (131), the upper end part (151) is provided with a second through hole (1511), and the water-proof sleeve base (161) covers and fits the upper surface of the upper end part (151); —The groove (1111), the first through hole (1311), and the second through hole (1511) are projected along the axial direction of the sleeve (113) and at least partially overlap and penetrate each other; the surface enclosed by the projection line of the groove (1111) near the lower contour of the upper end plate (131) at least partially exceeds the surface enclosed by the projection line of the first through hole (1311) on the lower end face contour of the upper end plate (131); —When the water-proof sleeve (160) is formed by injection molding, the plastic fills the cavity of the groove (1111), the first through hole (1311), and the second through hole (1511) to form an inverted buckle (1611) integral with the water-proof sleeve base (161).

2. The encapsulated stator according to claim 1, characterized in that: The groove (1111) is a circular blind hole, the first through hole (1311) is a circular through hole, the axes of the groove and the first through hole (1311) are collinear, and the buckle (1611) is shaped like a rivet.

3. The encapsulated stator according to claim 1, characterized in that: The groove (1111) is square, and the first through hole (1311) is square.

4. The encapsulated stator according to claim 1, characterized in that: The first through hole (1311) has an axial cross-sectional shape that is tapered, narrow at the top and wide at the bottom.

5. The encapsulated stator according to claim 1, characterized in that: The upper flange (111) has a platform (1112) protruding from its upper side and attached to the upper end plate (131), and the platform has the groove (1111) inside.

6. A solenoid valve, comprising an opening / closing element and a valve body (20), characterized in that: It also includes the encapsulated stator according to any one of claims 1-5, wherein the water-proof sleeve (160) is sealed to the valve body (20).

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