Electromagnetic valve sleeve and shock absorber

Abstract

The electromagnetic valve sleeve is provided with an inner cavity, the inner cavity is used for containing an armature of an electromagnetic valve and can be in sliding fit with the armature, a strip-shaped groove is formed in the inner wall of the inner cavity, and the strip-shaped groove is matched with the outer side wall of the armature to form a damping channel; the damping channel is used for guiding the fluid medium from one axial end of the inner cavity to the other axial end of the inner cavity. According to the electromagnetic valve sleeve and the shock absorber, the technical problems that the machining difficulty is high and the cost is high can be solved.

Description

Technical Field

[0001] The invention relates to a solenoid valve sleeve and a shock absorber. Background Art

[0002] The shock absorber is an important part of the vehicle chassis system, which can effectively buffer the vibration of the vehicle chassis. The shock absorber includes a damper, a solenoid valve and a control unit, among which the solenoid valve is the key device for controlling the damping force of the shock absorber. Figure 1 , Figure 1 It is a solenoid valve in the prior art, comprising an armature 11' and a push rod 12'. When the solenoid valve is energized, the armature 11' is displaced under the action of the magnetic field force, so that the armature 11' drives the push rod 12' to displace.

[0003] In the prior art, the push rod 12' is provided with a center hole 121', and the armature 11' is provided with a through hole 111', so as to realize the circulation of the fluid medium in different chambers of the shock absorber. However, in the prior art, the center hole 121' of the push rod 12' is a long and narrow hole, and holes need to be drilled and connected at both ends of the push rod 12' during processing, resulting in high processing difficulty and cost of the solenoid valve. Moreover, processing the through hole 111' on the armature 11' will also cause high processing difficulty and cost of the solenoid valve. Summary of the invention

[0004] The object of the present invention is to provide a solenoid valve sleeve and a shock absorber, which can solve the technical problems of high processing difficulty and high cost.

[0005] The first aspect of the present invention provides a solenoid valve sleeve, which is used for a solenoid valve of a shock absorber. The solenoid valve sleeve is provided with an inner cavity, which is used to accommodate the armature of the solenoid valve and can form a sliding fit with the armature. The inner wall of the inner cavity is provided with a strip groove, and the strip groove cooperates with the outer wall of the armature to form a damping channel. The damping channel is used to guide the fluid medium from one axial end of the inner cavity to the other axial end.

[0006] According to an embodiment of the present invention, at least one strip-shaped groove is provided and is evenly distributed along the circumference of the inner cavity with the axis of the inner cavity as the center.

[0007] According to an embodiment of the present invention, the solenoid valve sleeve is formed by an integral molding process, and the strip-shaped groove is formed by the integral molding process.

[0008] According to an embodiment of the present invention, the solenoid valve sleeve is formed by a powder metallurgy process.

[0009] According to an embodiment of the present invention, the inner cavity has a step surface, the armature has a shoulder, and the step surface is used to cooperate with the shoulder.

[0010] According to an embodiment of the present invention, the solenoid valve sleeve is configured as a cylindrical structure.

[0011] A second aspect of the present invention provides a shock absorber, comprising a solenoid valve, wherein the solenoid valve is provided with a solenoid valve sleeve as described in any one of the above items, wherein an armature of the solenoid valve is sleeved in an inner cavity of the solenoid valve sleeve, and the armature can slide along the axial direction of the solenoid valve sleeve.

[0012] The solenoid valve sleeve and shock absorber provided by the present invention are characterized in that the inner cavity of the solenoid valve sleeve is provided with a strip groove. After the armature is installed in the inner cavity of the solenoid valve sleeve, the armature and the strip groove cooperate to form a damping channel for the flow of fluid medium. That is, the outer wall of the armature and the groove wall of the strip groove together form a damping channel. The damping channel replaces the functions of the push rod center hole and the armature through hole in the prior art. The above-mentioned damping channel can allow fluid medium (liquid and gas) to circulate, and when the fluid medium flows through the damping channel, it can form a certain damping effect on the fluid medium due to the cross-sectional size of the damping channel. With such an arrangement, the solenoid valve sleeve and shock absorber provided by the present invention do not need to process the push rod center hole and the armature through hole, thereby solving the technical problems of high processing difficulty and high production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram showing the partial structure of a solenoid valve in the prior art.

[0014] Figure 2 1 is a schematic diagram showing a partial structure of a shock absorber according to an embodiment of the present invention.

[0015] Figure 3 Schematic diagram of the structure of a solenoid valve sleeve according to an embodiment of the present invention.

[0016] Figure 4 The figure is a schematic diagram showing the end surface structure of the solenoid valve sleeve and the armature according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following detailed description and drawings are used to illustrate the principle of the present invention. The present invention is not limited to the preferred embodiments described. The protection scope of the present invention is defined by the claims.

[0018] It should be noted that the orientations or positional relationships indicated in this specification are based on the orientations or positional relationships described in the accompanying drawings and are only for the convenience and simplification of description, and do not indicate or imply that the device referred to must have a specific orientation or be constructed in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0019] Figure 2is a schematic diagram showing a partial structure of a shock absorber according to an embodiment of the present invention, Figure 3 1 is a schematic diagram showing the structure of a solenoid valve sleeve according to an embodiment of the present invention. Figure 4 is a schematic diagram showing the end surface structure of the solenoid valve sleeve and the armature according to an embodiment of the present invention. Figure 2-Figure 4 The solenoid valve sleeve 13 is used for the solenoid valve of the shock absorber. The solenoid valve sleeve 13 is provided with an inner cavity 132, in which the armature 11 of the solenoid valve is provided, and the outer wall of the armature 11 is slidably matched with the inner wall of the inner cavity 132.

[0020] In one embodiment, the armature 11 can be configured as a columnar structure with a center line, such as a cylindrical structure, a polygonal cylindrical structure, etc. Correspondingly, the shape of the inner cavity 132 matches the shape of the armature 11. The inner cavity 132 and the armature 11 form a sliding fit, and the sliding direction is consistent with the center line direction of the armature 11. The outer contour shape of the solenoid valve sleeve 13 can also be correspondingly configured as a columnar structure with a center line, such as a cylindrical structure, a polygonal cylindrical structure, etc., and the center line of the solenoid valve sleeve 13 coincides with the center line of the armature 11.

[0021] In some embodiments, when the solenoid valve sleeve 13 is installed on the shock absorber, the center line of the solenoid valve sleeve 13 is parallel to the axis of the shock absorber, that is, the axial direction of the solenoid valve sleeve 13 is consistent with the axial direction of the shock absorber.

[0022] like Figure 3 As shown, the inner wall of the inner cavity 132 of the solenoid valve sleeve 13 is provided with a strip groove 131. In some embodiments, the extension direction of the strip groove 131 can be consistent with the axial direction of the solenoid valve sleeve 13, and the strip groove 131 extends from one axial end of the inner cavity 132 to the other end.

[0023] like Figure 4 As shown, the strip groove 131 cooperates with the outer side wall of the armature 11 to form a damping channel 14, and the damping channel 14 is used to guide the fluid medium from one axial end of the inner cavity 132 to the other axial end. That is, the outer side wall of the armature 11 and the groove wall of the strip groove 131 together enclose the damping channel 14. The damping channel 14 replaces the function of the central hole of the push rod 12 and the through hole of the armature 11 in the prior art, and the damping channel 14 can allow fluid medium (liquid and gas) to circulate. When the fluid medium flows through the damping channel 14, it can form a certain damping effect on the fluid medium due to the cross-sectional size of the damping channel 14. Therefore, the fluid damping force can be set by setting the cross-sectional size of the damping channel 14.

[0024] With such a configuration, the solenoid valve sleeve 13 in the embodiment of the present invention only needs to be provided with a strip groove 131 on the inner wall of the inner cavity 132 of the solenoid valve sleeve 13, and the damping channel 14 formed by the strip groove 131 and the outer wall of the armature 11 can replace the center hole of the push rod 12 and the through hole of the armature 11. When the solenoid valve is processed, it is not necessary to process the center hole of the push rod 12 and the through hole of the armature 11, which effectively solves the technical problems of high processing difficulty and high production cost of the solenoid valve in the prior art.

[0025] When the fluid medium flows through the damping channel 14, the fluid medium contacts the outer wall of the armature 11, and the pressure of the fluid medium acts on the outer wall of the armature 11 in the radial direction of the armature 11. When the armature 11 moves axially, the radial pressure of the fluid medium will cause certain disturbances to the armature 11.

[0026] In order to reduce the disturbance of the fluid medium to the armature 11, in a further embodiment, at least one strip groove 131 is provided, and the strip grooves 131 are evenly distributed along the circumference of the inner cavity 132 with the axis of the inner cavity 132 as the center. For example, in some embodiments, three strip grooves 131 are provided, and the three strip grooves 131 are evenly distributed along the circumference on the inner wall of the inner cavity 132 with the axis of the inner cavity 132 as the center. Of course, in other embodiments, the strip grooves 131 are provided as two, four, five, etc.

[0027] With such arrangement, when the fluid medium flows through the damping channel 14, the radial pressures exerted on the armature 11 by the fluid medium in each damping channel 14 can offset each other. That is, the resultant force of the radial pressures exerted by the fluid medium on the armature 11 is zero, and such arrangement avoids disturbance to the armature 11.

[0028] In some embodiments, in order to facilitate the processing of the solenoid valve sleeve 13, the solenoid valve sleeve 13 can be formed by an integrated molding process, and the strip groove 131 is formed by the integrated molding process. During the molding process of the solenoid valve sleeve 13, the strip groove 131 is formed at the same time, and there is no need to form the strip groove 131 by other processes. The processing process is simple and the cost is low. For example, the solenoid valve sleeve 13 can be constructed as an integrated molding structure by a powder metallurgy process.

[0029] Alternatively or additionally, the armature 11 may be provided with a damping channel, and may be configured to form the damping channel by an integral molding process. During the molding process of the armature 11, the damping channel is simultaneously formed, and no additional processing of the damping channel is required. For example, the armature 11 may be configured as an integral molding structure by a powder metallurgy process. The armature 11 may be cylindrical.

[0030] In one embodiment, the inner cavity 132 has a step surface, and the armature 11 has a shoulder, and the step surface is used to cooperate with the shoulder. The solenoid valve sleeve 13 can be set to a cylindrical structure. When the cross section of the armature 11 is circular, the cross section of the inner cavity 132 is correspondingly circular. The inner cavity 132 and the armature 11 can both include a large diameter portion and a small diameter portion along their axial direction, and the large diameter portion 1322 and the small diameter portion 1321 of the inner cavity 132 correspond to the large diameter portion and the small diameter portion of the armature 11, respectively. In this way, the junction position of the large diameter portion 1322 and the small diameter portion 1321 of the inner cavity 132 forms a step surface, which can provide a larger suction area for the armature 11, thereby providing a larger electromagnetic force.

[0031] The embodiment of the present invention further provides a shock absorber, including a solenoid valve, the solenoid valve is provided with a solenoid valve sleeve 13 as described in any of the above embodiments, the armature 11 of the solenoid valve is sleeved in the inner cavity 132 of the solenoid valve sleeve 13, and the armature 11 can slide along the axial direction of the solenoid valve sleeve 13. With such a configuration, the shock absorber provided in this embodiment is easy to process and has a low cost. The derivation process of this beneficial effect is generally similar to the derivation process of the beneficial effect brought by the above-mentioned solenoid valve sleeve 13, and will not be repeated here.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0033] Reference numerals list

[0034] 11, 11' armature

[0035] 111' through hole

[0036] 12, 12' putter

[0037] 121' center hole

[0038] 13 Solenoid valve sleeve

[0039] 131 Strip groove

[0040] 132 Lumen

[0041] 1321 Trail

[0042] 1322 Large diameter part

[0043] 14 Damping channel.

Claims

1. A solenoid valve sleeve (13), which is used for a solenoid valve of a shock absorber, wherein the solenoid valve sleeve (13) is provided with an inner cavity (132), wherein the inner cavity (132) is used to accommodate an armature (11) of the solenoid valve and can form a sliding fit with the armature (11), wherein the inner wall of the inner cavity (132) is provided with a strip groove (131), wherein the strip groove (131) cooperates with the outer wall of the armature (11) to form a damping channel (14), wherein the damping channel (14) is used to guide a fluid medium from one axial end of the inner cavity (132) to the other axial end.

2. The solenoid valve sleeve (13) according to claim 1, wherein: The strip-shaped groove (131) is provided in a number of at least one and is evenly distributed along the circumference of the inner cavity (132) with the axis of the inner cavity (132) as the center.

3. The solenoid valve sleeve (13) according to claim 1, wherein: The solenoid valve sleeve (13) is formed by an integral molding process, and the strip-shaped groove (131) is formed by the integral molding process.

4. The solenoid valve sleeve (13) according to claim 3, wherein: The solenoid valve sleeve (13) is formed by a powder metallurgy process.

5. The solenoid valve sleeve (13) according to claim 1, wherein: The inner cavity (132) has a step surface, the armature (11) has a shoulder, and the step surface is used to cooperate with the shoulder.

6. The solenoid valve sleeve (13) according to any one of claims 1 to 5, wherein: The solenoid valve sleeve (13) is configured as a cylindrical structure.

7. A shock absorber, comprising a solenoid valve, wherein the solenoid valve is provided with a solenoid valve sleeve (13) as described in any one of claims 1 to 6, the armature (11) of the solenoid valve is sleeved in an inner cavity (132) of the solenoid valve sleeve (13), and the armature (11) can slide along the axial direction of the solenoid valve sleeve (13).

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