Overflow valve coil with sealing function and high-pressure oil pump assembly
By designing an overflow valve coil with a sealing function, the problem of easy corrosion of the overflow valve core shell was solved, thus protecting the overflow valve core shell, preventing fuel leakage, and improving the safety of the high-pressure oil pump assembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-04-07
AI Technical Summary
The overflow valve core housing of the high-pressure oil pump assembly is susceptible to corrosion from steam and water, which can lead to rust penetration and fuel leakage, posing a safety hazard.
Design an overflow valve coil with sealing function. The coil is completely covered by the overflow valve core shell by plastic encapsulation. Combined with the coil bushing and coil winding, a magnetic circuit is formed to protect the overflow valve core shell from corrosion. The demolding problem is also solved by optimizing the injection molding process.
It effectively prevents steam and water from contacting the overflow valve core housing, avoids corrosion, reduces the risk of fuel leakage, and improves vehicle driving safety.
Smart Images
Figure CN224096525U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to high pressure oil pump assembly technical field relates to a kind of overflow valve coil and high pressure oil pump assembly with sealing function. BACKGROUND
[0002] High pressure oil pump assembly is installed on engine cylinder cover, is exposed in engine cabin, and working condition is bad. Steam in cabin and water that car front wheel is rolled up when passing through accumulated water or muddy road are prone to cause rust on the surface of high pressure oil pump assembly. Especially in the position of overflow valve spool shell, since overflow valve spool shell is thin, perforation is prone to after rust, to cause fuel leakage and produce safety hazard.
[0003] Specifically, overflow valve spool shell is exposed on surface, steam or water can enter the cavity between bottom coil shell body and overflow valve spool shell through the gap between overflow valve coil plastic package and overflow valve spool shell, and is prone to accumulate in cavity area to cause overflow valve spool shell to be corroded, and seriously, to cause overflow valve spool shell to rust and cause fuel leakage. SUMMARY
[0004] The utility model discloses a kind of overflow valve coil and high pressure oil pump assembly with sealing function to overcome at least one of the defects of the above prior art, the utility model is used to protect overflow valve spool shell, prevent steam or water from contacting overflow valve spool shell.
[0005] The purpose of the utility model can be realized by the following technical solutions:
[0006] One of the technical solutions of the utility model is to provide an overflow valve coil with sealing function, which is covered and arranged outside the overflow valve spool shell, the overflow valve coil includes a coil plastic package and a coil shell body, the coil shell body is clamped in the coil plastic package, the combination of the coil plastic package and the coil shell body is arranged outside the overflow valve spool shell, the coil plastic package completely covers one end of the overflow valve spool shell, prevents steam or water from contacting the overflow valve spool shell, and thus protects the overflow valve spool shell from corrosion.
[0007] Further, a first cavity is left between the coil plastic package and the overflow valve spool shell in the radial direction, a coil bushing is arranged in the first cavity, the coil bushing is arranged in the coil plastic package and embedded outside the overflow valve spool shell, the axial height of the coil bushing is equal to the first cavity, the part of the first cavity located in the diameter projection of the coil bushing is limited by the diameter of the coil bushing and the movement direction of the mold core, and cannot be smoothly demolded during injection molding, and since there is a draft angle in the injection molding process mold core, the hole diameter of the bottom end of the first cavity is small, and the embedded coil bushing can perfectly solve the problems of injection molding demolding and draft angle.
[0008] Further, the coil shell body is internally provided with a coil winding, which is arranged between the coil plastic package and the coil shell body in the radial direction, and the coil winding is sleeved outside the overflow valve spool shell.
[0009] Further, the coil shell body is internally provided with a coil gasket, which is arranged between the coil plastic package and the coil winding in the radial direction, and the coil gasket is sleeved outside the overflow valve spool shell, and when the coil winding is powered on, the coil shell body, the coil gasket, the overflow valve magnetic pole piece and the coil armature form a magnetic circuit.
[0010] One of the technical solutions of the utility model provides a high-pressure oil pump assembly with sealing function, the high-pressure oil pump assembly is internally provided with the overflow valve coil and the overflow valve spool shell.
[0011] Further, the overflow valve spool shell is internally provided with an overflow valve magnetic pole piece, and the outer diameter of the overflow valve magnetic pole piece is in interference fit with the inner diameter of the overflow valve spool shell, so that the overflow valve magnetic pole piece is fixed on the overflow valve spool shell.
[0012] Further, the overflow valve spool shell is internally provided with a coil armature, and the outer diameter of the coil armature is in clearance fit with the inner diameter of the overflow valve spool shell, and the coil armature can move up and down in the overflow valve spool shell, when the coil winding is powered on, the coil winding generates a magnetic field to magnetize the overflow valve magnetic pole piece and the coil armature, and the magnetic force between the two can overcome the spring force of the overflow valve return spring to make the coil armature move towards the overflow valve magnetic pole piece until the end face of the coil armature is attached to the end face of the overflow valve magnetic pole piece.
[0013] Further, the overflow valve magnetic pole piece is connected with the coil armature through the overflow valve return spring, and when the coil winding is powered off, the coil armature moves downward under the spring force of the overflow valve return spring.
[0014] Further, the overflow valve magnetic pole piece is internally provided with a second cavity, the coil armature is internally provided with a third cavity, and the overflow valve return spring is arranged in the cavity formed by the communication of the second cavity and the third cavity.
[0015] Further, one end of the overflow valve return spring is connected with the wall surface of the second cavity, and the other end is connected with the wall surface of the third cavity.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] (1) By improving the coil structure, this utility model completely encloses the overflow valve core shell inside the overflow valve coil plastic seal, preventing steam or water outside the overflow valve coil from contacting the overflow valve core shell, thereby completely eliminating fuel leakage caused by corrosion of the overflow valve core shell and reducing vehicle driving safety risks.
[0018] (2) In order to meet the manufacturability of the coil, the present invention pre-embeds a coil bushing on the overflow valve core shell during injection molding. The cavity between the coil encapsulation and the overflow valve core shell is located within the diameter projection of the coil bushing. Due to the limitation of the diameter of the coil bushing and the direction of movement of the mold core, it cannot be successfully demolded during injection molding. Furthermore, due to the draft angle of the mold core in the injection molding process, the bottom diameter of the cavity will be too small. The pre-embedded coil bushing can perfectly solve the problems of injection molding demolding and draft angle. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the high-pressure oil pump assembly with sealing function in the embodiment of this utility model.
[0020] Explanation of markings in the diagram:
[0021] 1—Coil encapsulation, 2—Coil bushing, 3—Coil washer, 4—Coil winding, 5—Coil housing, 6—Relief valve core housing, 7—Relief valve magnetic pole piece, 8—Relief valve return spring, 9—Coil armature. Detailed Implementation
[0022] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and are not intended to imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example:
[0026] An overflow valve coil with sealing function, such as Figure 1 As shown, the overflow valve coil is encased in a plastic sleeve outside the overflow valve core housing 6. The overflow valve coil includes a coil encapsulation 1 and a coil housing body 5. The coil housing body 5 is fitted inside the coil encapsulation 1. The combination formed by the coil encapsulation 1 and the coil housing body 5 is sleeved outside the overflow valve core housing 6. The coil encapsulation 1 completely covers one end of the overflow valve core housing 6, preventing steam or water from contacting the overflow valve core housing 6, thereby protecting the overflow valve core housing 6 from corrosion.
[0027] A first cavity is provided radially between the coil encapsulation 1 and the overflow valve core housing 6. A coil bushing 2 is provided in the first cavity. The coil bushing 2 is sleeved inside the coil encapsulation 1 and embedded outside the overflow valve core housing 6. The axial height of the coil bushing 2 is equal to that of the first cavity. The portion of the first cavity located within the diameter projection of the coil bushing 2 is restricted by the diameter of the coil bushing 2 and the direction of movement of the mold core, and cannot be easily demolded during injection molding. Furthermore, due to the draft angle of the mold core in the injection molding process, the bottom diameter of the first cavity will be too small. The embedded coil bushing 2 can perfectly solve the problems of injection molding demolding and draft angle.
[0028] A coil winding 4 is provided inside the coil housing body 5. The coil winding 4 is arranged radially between the coil plastic seal 1 and the coil housing body 5. The coil winding 4 is sleeved on the outside of the overflow valve core housing 6.
[0029] A coil washer 3 is provided inside the coil housing body 5. The coil washer 3 is located radially between the coil plastic seal 1 and the coil winding 4. The coil washer 3 is sleeved on the outside of the overflow valve core housing 6. When the coil winding 4 is energized, the coil housing body 5, the coil washer 3, the overflow valve magnetic pole piece 7, and the coil armature 9 form a magnetic circuit.
[0030] A high-pressure oil pump assembly with sealing function, wherein the high-pressure oil pump assembly is provided with the above-mentioned overflow valve coil and overflow valve core housing 6;
[0031] An overflow valve magnetic pole piece 7 is provided inside the overflow valve core housing 6. The outer diameter of the overflow valve magnetic pole piece 7 and the inner diameter of the overflow valve core housing 6 form an interference fit, thereby fixing the overflow valve magnetic pole piece 7 to the overflow valve core housing 6.
[0032] A coil armature 9 is provided inside the overflow valve core housing 6. The outer diameter of the coil armature 9 and the inner diameter of the overflow valve core housing 6 form a clearance fit. The coil armature 9 can move up and down inside the overflow valve core housing 6. When the coil winding 4 is energized, the coil winding 4 generates a magnetic field that magnetizes the overflow valve magnetic pole piece 7 and the coil armature 9. The magnetic force between the two overcomes the spring force of the overflow valve reset spring 8 and causes the coil armature 9 to move toward the overflow valve magnetic pole piece 7 until the end face of the coil armature 9 is in contact with the end face of the overflow valve magnetic pole piece 7.
[0033] The overflow valve magnetic pole piece 7 is connected to the coil armature 9 through the overflow valve reset spring 8. When the coil winding 4 is de-energized, the coil armature 9 moves downward under the spring force of the overflow valve reset spring 8.
[0034] The overflow valve magnetic pole piece 7 has a second cavity, the coil armature 9 has a third cavity, and the overflow valve reset spring 8 is installed in the cavity that connects the second cavity and the third cavity.
[0035] One end of the overflow valve reset spring 8 is connected to the wall of the second cavity, and the other end is connected to the wall of the third cavity.
[0036] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.
Claims
1. A relief valve coil with sealing function, characterized in that, The overflow valve coil is wrapped around the overflow valve core housing (6). The overflow valve coil includes a coil encapsulation (1) and a coil housing body (5). The coil housing body (5) is fitted inside the coil encapsulation (1). The combination formed by the coil encapsulation (1) and the coil housing body (5) is wrapped around the overflow valve core housing (6). The coil encapsulation (1) completely covers one end of the overflow valve core housing (6).
2. The overflow valve coil with sealing function according to claim 1, characterized in that, A first cavity is provided radially between the coil encapsulation (1) and the overflow valve core housing (6). A coil bushing (2) is provided in the first cavity. The coil bushing (2) is fitted inside the coil encapsulation (1) and pre-embedded outside the overflow valve core housing (6). The axial height of the coil bushing (2) is equal to that of the first cavity.
3. The overflow valve coil with sealing function according to claim 1, characterized in that, The coil housing body (5) is provided with a coil winding (4), which is located radially between the coil plastic seal (1) and the coil housing body (5). The coil winding (4) is sleeved on the outside of the overflow valve core housing (6).
4. The overflow valve coil with sealing function according to claim 3, characterized in that, A coil washer (3) is provided inside the coil housing body (5). The coil washer (3) is located radially between the coil encapsulation (1) and the coil winding (4). The coil washer (3) is fitted outside the overflow valve core housing (6).
5. A high-pressure oil pump assembly with sealing function, characterized in that, The high-pressure oil pump assembly is provided with an overflow valve coil as described in any one of claims 1 to 4, and an overflow valve core housing (6).
6. A high-pressure oil pump assembly with sealing function according to claim 5, characterized in that, The overflow valve core housing (6) is provided with an overflow valve magnetic pole piece (7), and the outer diameter of the overflow valve magnetic pole piece (7) and the inner diameter of the overflow valve core housing (6) form an interference fit.
7. A high-pressure oil pump assembly with sealing function according to claim 6, characterized in that, The overflow valve core housing (6) is provided with a coil armature (9), and the outer diameter of the coil armature (9) and the inner diameter of the overflow valve core housing (6) form a clearance fit.
8. A high-pressure oil pump assembly with sealing function according to claim 7, characterized in that, The overflow valve magnetic pole piece (7) is connected to the coil armature (9) through the overflow valve reset spring (8).
9. A high-pressure oil pump assembly with sealing function according to claim 8, characterized in that, The overflow valve magnetic pole piece (7) has a second cavity, and the coil armature (9) has a third cavity. The overflow valve reset spring (8) is installed in the cavity that connects the second cavity and the third cavity.
10. A high-pressure oil pump assembly with sealing function according to claim 9, characterized in that, One end of the overflow valve reset spring (8) is connected to the wall of the second cavity, and the other end is connected to the wall of the third cavity.