An anti-stuck valve baffle

Abstract

The present invention relates to the technical field of solenoid valves, and discloses an anti-stuck valve baffle. The middle part of the anti-stuck valve baffle bulges upward to form an arc-shaped convex part. A plurality of claws are formed by bending on the edge of the anti-stuck valve baffle, and the plurality of claws are evenly distributed around the arc-shaped convex part. The bending direction of the claws is opposite to the convex direction of the arc-shaped convex part. An inner hole is formed in the anti-stuck valve baffle, and the distance from the inner hole to the arc-shaped convex part is less than the distance from the claws to the arc-shaped convex part. By the above method, the present invention can effectively reduce the risk of particle shedding between the anti-stuck valve baffle and the armature when assembled with the armature, thereby solving the problem of solenoid valve jamming and improving the reliability of the solenoid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and particularly to an anti-stuck valve retaining plate. Background Art

[0002] Solenoid valves are widely used in the automotive field, especially in automotive transmissions and engines. As a switching device for controlling the oil circuit, the performance and reliability of solenoid valves directly relate to the function realization of the automotive power system and determine the dynamics, safety, and reliability of the vehicle.

[0003] The problems of solenoid valve stalling, slow response, and reliability are common problems in automotive solenoid valves. An important cause of this problem is the metal particles peeling off inside the solenoid head. To solve the problem of the cleanliness inside the solenoid head, various manufacturers have also taken extensive measures. For example, each internal part of the solenoid head is strictly cleaned and inspected before assembly, and the environmental quality at the assembly site is strictly controlled. However, there has been no good control method for the cleanliness particles generated during the assembly itself.

[0004] Among them, an important source of particles inside the solenoid valve is the metal particles generated when the retaining plate is press-fitted with the armature. Due to functional requirements, an interference connection is required between the retaining plate and the armature. During interference press-fitting, metal peeling occurs on the inner wall of the armature hole or the outer wall of the retaining plate, generating metal particles that remain inside the solenoid head, causing solenoid valve stalling and reliability problems.

[0005] In existing solenoid valves, the solenoid valve retaining plate generally presses a disc-shaped retaining plate into the middle hole of the armature. As shown in Figure 1 When the disc-shaped retaining plate is pressed into the armature, due to the insufficient shrinkage of the disc-shaped retaining plate itself, material peeling occurs on the outer wall of the disc-shaped retaining plate during press-fitting or on the inner wall of the armature, generating metal particles that remain inside the solenoid head, causing solenoid valve stalling and reliability problems.

[0006] The existing disc-shaped retaining plate has the following disadvantages:

[0007] Due to the relatively large stiffness of the disc-shaped retaining plate, when it is press-fitted into the armature with interference, a large interference amount is adopted to ensure the connection tightness and reliability of the two parts. This will cause material peeling of the armature or the retaining plate when the retaining plate is pressed into the armature. The peeled material falls into the solenoid head, causing the phenomenon of valve jamming during the movement of the armature. When the valve jamming is slight, it leads to an increase in solenoid valve hysteresis and a decrease in solenoid valve performance.

[0008] The particles peeling off during the installation of the disc-shaped retaining plate will exist inside the solenoid head. Since the armature is constantly reciprocating, the peeling particles will cause the outer diameter of the armature and the diode mating with the outer diameter of the armature to wear faster, resulting in an increasing gap between the armature and the diode, and ultimately reducing the solenoid valve performance and greatly shortening the service life of the solenoid valve.

[0009] Particles that fall off during the installation of the disc-shaped shim can cause serious valve jamming. In extreme cases, the armature of the solenoid valve cannot move, and the solenoid valve fails completely. Summary of the Invention

[0010] The main technical problem to be solved by the present invention is to provide an anti-valve-jamming shim that can effectively reduce the risk of particle shedding between the anti-valve-jamming shim and the armature when assembled with the armature, thereby solving the problem of solenoid valve jamming and improving the reliability of the solenoid valve.

[0011] To solve the above technical problem, one technical solution adopted by the present invention is: to provide an anti-valve-jamming shim, the middle part of the anti-valve-jamming shim bulges upward to form an arc-shaped convex part, and multiple claws are formed by bending on the edge of the anti-valve-jamming shim. The multiple claws are evenly distributed around the arc-shaped convex part, and the bending direction of the claws is opposite to the convex direction of the arc-shaped convex part; an inner hole is provided on the anti-valve-jamming shim, and the distance from the inner hole to the arc-shaped convex part is less than the distance from the claws to the arc-shaped convex part.

[0012] Preferably, there are multiple inner holes, and the multiple inner holes are evenly distributed around the arc-shaped convex part.

[0013] Preferably, there are two inner holes and two claws, and the connection line of the two inner holes is perpendicular to the connection line of the two claws.

[0014] Preferably, the claws are perpendicular to the anti-valve-jamming shim.

[0015] Preferably, the included angle between the outer surface of the claws and the anti-valve-jamming shim is an obtuse angle; the end of the claws can play a guiding role when press-fitted with the armature, and as the pressing depth of the claws increases, the connection strength between the anti-valve-jamming shim and the armature will gradually increase.

[0016] Preferably, the middle part of the claws bulges outward, and the claws are overall in a C shape; the end of the claws can achieve guiding, and the middle part of the claws can be closely fitted with the inner side wall of the circular groove on the armature, making the connection more firm.

[0017] Preferably, the width of the end of the claws is greater than the width of the root of the claws to improve the connection strength between the anti-valve-jamming shim and the armature.

[0018] Preferably, the width of the claws gradually decreases from its end to its root, that is, the included angle between the side wall of the claws and the anti-valve-jamming shim is an acute angle.

[0019] Preferably, the hardness of the anti-valve-jamming shim is less than the hardness of the armature inside the solenoid valve, which will not cause the shedding of the armature material and eliminate the valve jamming phenomenon caused by the shedding of the armature material.

[0020] Preferably, the anti - jamming valve baffle is of an integral structure, with better overall structural integrity, higher strength, and simple processing.

[0021] The beneficial effects of the present invention are as follows: When the present invention is assembled with the armature, it can effectively reduce the risk of particle shedding between the anti - jamming valve baffle and the armature, thus solving the problem of solenoid valve jamming and improving the reliability of the solenoid valve. When the anti - jamming valve baffle is pressed into the circular groove of the armature, the claws can contract inward, increasing the elastic deformation amount of the anti - jamming valve baffle, thereby solving the cleanliness problem during the press - fitting of the anti - jamming valve baffle and the armature. In addition, after the anti - jamming valve baffle is pressed into the circular groove of the armature, due to the elastic deformation of the claws, the outer surface of the claws is in close contact with the inner side wall of the circular groove of the armature, which is beneficial to improving the bonding force between the anti - jamming valve baffle and the armature and ensuring high connection strength of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic perspective view of a disc baffle in the prior art;

[0023] Figure 2 is a schematic structural view of an anti - jamming valve baffle of the present invention installed in a solenoid valve;

[0024] Figure 3 is a schematic perspective view of Embodiment 1 of an anti - jamming valve baffle of the present invention;

[0025] Figure 4 is a schematic perspective view of Embodiment 1 of an anti - jamming valve baffle of the present invention from another angle;

[0026] Figure 5 is a schematic cross - sectional view of Embodiment 1 of an anti - jamming valve baffle of the present invention;

[0027] Figure 6 is a schematic assembly structure view of an anti - jamming valve baffle and an armature of the present invention;

[0028] Figure 7 is a schematic cross - sectional view of an anti - jamming valve baffle in Embodiment 2 of the present invention;

[0029] Figure 8 is a schematic cross - sectional view of an anti - jamming valve baffle in Embodiment 3 of the present invention;

[0030] Figure 9 is a schematic cross - sectional view of an anti - jamming valve baffle in Embodiment 4 of the present invention.

[0031] The labels of each component in the drawings are as follows: 10, anti - jamming valve baffle; 11, inner hole; 12, arc - shaped convex part; 13, claws; 20, armature; 30, magnetic conductive sleeve; 40, valve core; 50, return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0033] Please refer to Figures 2 to 9 , the embodiments of the present invention include:

[0034] Embodiment 1

[0035] An anti-jamming valve flap 10 is installed in the solenoid valve. The structure of the solenoid valve is as Figure 2 shown. The solenoid valve includes an anti-jamming valve flap 10, an armature 20, a magnetic guide sleeve 30, a valve core 40, and a return spring 50; the armature 20 is slidably arranged in the inner hole of the magnetic guide sleeve 30, and under the combined action of electromagnetic force and spring force, the armature 20 can slide back and forth in the inner hole of the magnetic guide sleeve 30; the anti-jamming valve flap 10 is fixedly pressed on the armature 20; one end of the valve core 40 is pressed on the return spring 50, and the other end is pressed on the anti-jamming valve flap 10; when the solenoid valve is powered on, the armature 20 moves under the action of electromagnetic force, and pushes the valve core 40 through the anti-jamming valve flap 10, compressing the return spring 50; when powered off, the valve core 40 pushes the armature 20 through the anti-jamming valve flap 10 under the action of the return spring 50, and finally the armature 20 is pressed against the bottom of the inner hole of the magnetic guide sleeve 30.

[0036] As Figures 3 to 5As shown, the anti - jamming valve baffle 10 is disc - shaped and is of an integral structure. The middle part of the anti - jamming valve baffle 10 bulges upward to form an arc - shaped convex part 12; the axis of the arc - shaped convex part 12 coincides with the axis of the anti - jamming valve baffle 10. Two claws 13 are formed by bending downward on the edge of the anti - jamming valve baffle 10, and the two claws 13 are symmetric about the arc - shaped convex part 12; the bending angle A of the claws 13 is 90 degrees, that is, the claws 13 are perpendicular to the anti - jamming valve baffle 10. When the anti - jamming valve baffle 10 is assembled with the armature 20, the claws 13 can contract, reducing the contact stress between the claws 13 and the armature 20, thereby reducing the risk that the materials of the anti - jamming valve baffle 10 or the armature 20 are squeezed off, reducing or eliminating the installation particles between the anti - jamming valve baffle 10 and the armature 20, improving the internal cleanliness of the electromagnetic head, and thus eliminating or reducing the phenomenon of solenoid valve jamming. The claws 13 are formed by bending a part of the structure on the anti - jamming valve baffle 10, which can endow the claws 13 with certain elasticity, and this bending part can be understood as an elastic structure on the anti - jamming valve baffle 10. Two inner holes 11 are symmetrically arranged on the anti - jamming valve baffle 10, the two inner holes 11 are symmetric about the arc - shaped convex part 12, and the connection line of the two inner holes 11 is perpendicular to the connection line of the two claws 13; the distance from the inner hole 11 to the arc - shaped convex part 12 is less than the distance from the claws 13 to the arc - shaped convex part 12. The design of the inner holes 11 can be conducive to improving the stress distribution of the anti - jamming valve baffle 10 when it is pressed into the armature 20, facilitating the inward contraction of the claws 13, and thus reducing the risk that the material on the outer wall of the anti - jamming valve baffle 10 is pressed and peeled off by the armature 20.

[0037] The hardness of the anti - jamming valve baffle 10 is less than that of the armature 20; the anti - jamming valve baffle 10 is made of an alloy material with relatively low stiffness in terms of material. In this way, when installing the anti - jamming valve baffle 10 and the armature 20, since the armature material is harder, it will not cause the armature material to fall off, thus preventing the cleanliness problem inside the electromagnetic head caused by the falling off of the armature material and eliminating the valve jamming phenomenon caused by the falling off of the armature material.

[0038] The assembly of the anti - jamming valve baffle 10 and the armature 20 is as Figure 6 shown. The outer side wall of the claws 13 is in interference fit with the inner side wall of the circular groove on the armature 20, and the lower surface of the anti - jamming valve baffle 10 is completely in contact with the end face of the armature 20; there is a circular groove on the armature 20 that matches the outer diameter of the claws 13, the circular groove communicates with the inner hole of the armature 20, the depth of the circular groove is greater than the height of the claws 13, and after the claws 13 are pressed into the circular groove, there is a certain gap between the end of the claws 13 and the bottom surface of the circular groove; after press - fitting, the inner hole 11 communicates with the circular groove of the armature 20.

[0039] Example 2

[0040] A valve anti - jamming shim 10, as Figure 7 shown, the difference from Embodiment 1 is only that: the bending angle A of the claw 13 is an obtuse angle, that is, the included angle A between the outer surface of the claw 13 and the lower surface of the valve anti - jamming shim 10 is an obtuse angle. When A is an obtuse angle, the distance width between the roots (bottoms) of the two claws 13 is less than the distance width between the ends (tops) of the two claws 13, so that a guiding effect can be achieved when press - fitting with the armature 20, and as the pressing depth of the claws increases, the connection strength between the valve anti - jamming shim 10 and the armature 20 will gradually increase, and the required crimping strength of the product can be achieved. The structural design of the claw 13 at this part can be understood as the design of a guiding structure.

[0041] Embodiment 3

[0042] A valve anti - jamming shim 10, as Figure 8 shown, the difference from Embodiment 1 is only that: the middle part of the claw 13 bulges outwards (i.e., to the other side of the side where the axis of the valve anti - jamming shim 10 is located), and the claw 13 is generally in a C - shaped state. The advantage of this structure is that when the claw 13 is pressed into the armature 20, the end of the claw 13 can achieve guiding, and the middle part of the claw 13 can be closely fitted with the inner side wall of the circular groove on the armature 20, making the connection more firm; and because the claw 13 is restricted by the circular groove on the armature 20 and will contract inwards, the risk of the particles of the valve anti - jamming shim 10 being pressed and peeled off can be reduced, improving the cleanliness and reliability inside the electromagnetic head. The structural design of the claw 13 at this part can be understood as the design of a guiding structure.

[0043] Embodiment 4

[0044] A valve anti - jamming shim 10, as Figure 9 shown, the difference from Embodiment 1 is only that: the width of the end of the claw 13 is greater than the width of the root of the claw 13, and the width of the claw 13 gradually becomes smaller from its end to its root, that is, the included angle B between the side wall of the claw 13 and the lower surface of the valve anti - jamming shim 10 is an acute angle. This structural design can improve the connection strength between the valve anti - jamming shim 10 and the armature 20.

[0045] When the anti-jamming valve baffle 10 of the present invention is press-fitted with the armature 20, first, through the guiding structure of the claws 13, the claws 13 can be inserted into the circular groove of the armature 20 to achieve automatic centering. Then, under the action of the press, the pressing depth of the claws 13 gradually increases. The elastic structure on the anti-jamming valve baffle 10 can ensure that the claws 13 gradually contract under the restriction of the inner side wall of the circular groove of the armature 20, thus ensuring the connection strength of the two parts. In addition, due to the inward contraction deformation of the claws 13 under the action of the inner side wall of the circular groove of the armature 20, the contact stress between the outer surface of the claws 13 and the inner side wall of the circular groove can be controlled within a certain range, thereby reducing or eliminating the crimping and peeling of the materials of the anti-jamming valve baffle 10 and the armature 20, and ultimately solving the problems of the internal cleanliness of the solenoid valve and the jamming of the solenoid valve, and improving the reliability of the solenoid valve. The claws in the present invention are not limited to two claws; the number of claws can be selected and designed according to the actual size and material of the armature of the solenoid valve product during product development, so as to effectively solve the problem of material particle shedding during press-fitting installation and ultimately solve the jamming problem of the solenoid valve.

[0046] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An anti-stuck valve baffle, characterized by: The middle part of the anti-stuck valve baffle is raised upward to form an arc convex portion, and the edge of the anti-stuck valve baffle is bent to form a plurality of claws, and the plurality of claws are evenly distributed around the arc convex portion, and the bending direction of the claws is opposite to the convex direction of the arc convex portion; the anti-stuck valve baffle is provided with an inner hole, and there are multiple inner holes, and the multiple inner holes are evenly distributed around the arc convex portion, and the distance from the inner hole to the arc convex portion is smaller than the distance from the claw to the arc convex portion. The included angle between the outer surface of the claw and the anti-stuck valve baffle is an obtuse angle, or the middle portion of the claw bulges outward, and the claw is in a C-shape as a whole; The hardness of the anti-stuck valve baffle is less than the hardness of the armature in the electromagnetic valve.

2. The anti-stuck valve baffle according to claim 1, characterized in that: There are two inner holes and two claws, and the line connecting the two inner holes is perpendicular to the line connecting the two claws.

3. The anti-stuck valve baffle according to claim 1, characterized in that: The anti-stuck valve baffle is an integrated structure.

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