Shell, electromagnetic damping valve and shock absorber

Abstract

The invention provides a shell which is of an integrated structure, a containing cavity and a pilot oil outlet channel are formed in the shell, and the containing cavity comprises a first cavity and a second cavity; the first cavity is used for containing a main valve assembly of the electromagnetic damping valve, a plurality of main valve oil outlets distributed at intervals in the circumferential direction are formed in the side wall of the first cavity, and oil entering the first cavity from a main valve seat of the main valve assembly can be discharged out of the shell through the main valve oil outlets. The second cavity is used for containing an armature assembly of the electromagnetic damping valve and a pilot valve element in a pilot valve assembly and communicates with a pilot oil outlet channel formed in the shell, and oil flowing through the pilot valve element can be discharged out of the shell through the pilot oil outlet channel. The invention further provides an electromagnetic damping valve and a shock absorber. The main valve shell used for containing the main valve assembly and the electromagnetic shell used for containing the armature assembly are integrally connected, so that the problems of product precision and machining difficulty caused by matching of different parts are solved, and meanwhile the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of variable damping vibration damper technology, specifically to a housing, an electromagnetic damping valve, and a vibration damper. Background Technology

[0002] In motor vehicles, the chassis is connected to the axle via the suspension system. To buffer the impact transmitted to the chassis from uneven road surfaces during vehicle travel, the suspension system typically includes shock absorbers. The shock absorbers use hydraulic fluid as a damping medium to absorb vibrations and impacts, and electromagnetic damping valves are used to control the flow of hydraulic fluid.

[0003] Existing electromagnetic damping valves, as described in Chinese invention patent application CN202310742470.4 entitled "Valve Assembly, Valve Device, Vibration Damper and Method for Regulating Oil Flow Pressure," include a valve housing and an armature. The valve housing is inserted into the passage of the armature, achieving coupling between the two. Oil entering the valve housing can flow to the outside of the valve housing through an oil flow opening or through the gap between the valve housing and the armature. Typically, the valve housing and armature are connected together using one or more methods, such as interference fit, threaded connection, welding, or riveting. This connection, on the one hand, requires high precision in the manufacturing of individual parts to ensure dimensional tolerances after assembly, increasing the complexity of the production process; on the other hand, the large number of parts increases production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a housing that is an integral structure that can simultaneously accommodate the main valve assembly, pilot valve assembly, and armature assembly of an electromagnetic damping valve, while meeting the operational requirements of the electromagnetic damping valve.

[0005] This invention provides a housing, which is an integral structure, comprising a receiving cavity and a pilot oil outlet channel. The receiving cavity extends axially along the housing and includes a first chamber and a second chamber that are interconnected. The first chamber is used to house the main valve assembly of an electromagnetic damping valve, and its side wall has a plurality of main valve oil outlets spaced circumferentially. Oil entering the first chamber from the main valve seat of the main valve assembly can be discharged to the outside of the housing through the main valve oil outlets. The second chamber is used to house the armature assembly of the electromagnetic damping valve and the pilot valve core of the pilot valve assembly, and is connected to the pilot oil outlet channel. Oil flowing through the pilot valve core can be discharged to the outside of the housing through the pilot oil outlet channel.

[0006] Preferably, a first countersunk hole is provided at one end of the first chamber away from the second chamber, and the first countersunk hole is used to install the main valve seat of the main valve assembly.

[0007] Preferably, a second countersunk hole is provided at one end of the first chamber near the second chamber, and the second countersunk hole is used to install the guide sleeve of the pilot valve assembly.

[0008] The present invention also provides an electromagnetic damping valve, including a coil, the aforementioned housing, and a main valve assembly, a pilot valve assembly, and an armature assembly disposed in the housing; the main valve assembly includes a main valve seat, a main valve piston, and a main valve spring disposed in the first chamber, the main valve seat being fixed in position and having a main valve inlet therein; the main valve piston is slidably disposed in the first chamber; the pilot valve assembly includes a connecting rod, a pilot spring, and a pilot valve core, the pilot spring and the pilot valve core being disposed in the second chamber, the connecting rod being used to connect the first chamber and the second chamber; the pilot spring is disposed between the connecting rod and the pilot valve core, and the main valve... A spring is disposed between the connecting rod and the main valve piston; the pilot valve core has a pilot valve core oil hole; the armature assembly includes a moving armature, a stationary armature, and a push rod disposed in the second chamber, the stationary armature is fixed in position, and has an axial channel and a stationary armature oil hole connected to the axial channel, the pilot oil channel is used to connect the stationary armature oil hole and the outside of the housing; one end of the push rod passes through the axial channel, and the other end is connected to the moving armature; the pilot valve core abuts against the stationary armature under the elastic action of the pilot spring; the coil is disposed outside the second chamber and is used to drive the push rod to move along the axial channel.

[0009] Preferably, one end of the pilot valve core is provided with a pressing protrusion, which is inserted into the end of the axial channel.

[0010] Preferably, an oil passage gap is provided between the axial channel and the push rod.

[0011] Preferably, the pilot valve assembly further includes a guide sleeve disposed in the first chamber, the guide sleeve being sleeved on the outside of the flow rod, and respectively abutting against the main valve spring and the pilot spring.

[0012] The present invention also provides a vibration damper, including the aforementioned electromagnetic damping valve.

[0013] The present invention integrates the main valve housing for accommodating the main valve assembly and the electromagnetic housing for accommodating the armature assembly into a single unit. By using a single unit housing, the armature assembly, pilot valve assembly and main valve assembly can be sequentially installed into the single unit housing. This avoids the product precision and processing difficulty problems caused by the matching of different parts, while reducing the number of parts and lowering production costs. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the housing of the present invention; Figure 2 This is a cross-sectional view of the electromagnetic damping valve of the present invention; Figure 3 This is a schematic diagram of the oil circuit when the electromagnetic damping valve of the present invention is energized.

[0015] Component designation explanation: 1. Shell 11. Receiving cavity 111. First Chamber 111a, First countersunk hole 111b, Second Countersunk Hole 112. Second Chamber 12. Main valve oil outlet 13. First, drain the oil channel. 2. Main valve seat 21. Main valve inlet 3. Main valve piston 4. Main valve spring 5. Guide sleeve 6. Connecting rod 61. Linkage Channel 62. Connecting rod side passage 7. Pilot valve core 71. Pilot valve core oil hole 8. Push rod 91. Moving armature 92. Static armature 921. Static armature oil hole Detailed Implementation

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0017] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, 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 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 invention according to the specific circumstances.

[0019] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] Figure 1 The image shown is a cross-sectional view of the housing of the present invention. In the following description, it will be referred to as... Figure 1 The accompanying diagram serves as a reference for orientation. Upward along the view paper is the upward direction, downward along the view paper is the downward direction, rightward along the view paper is the right direction, and leftward along the view paper is the left direction.

[0021] The present invention provides a housing, an electromagnetic damping valve assembled with the housing, and a vibration damper assembled with the electromagnetic damping valve.

[0022] like Figure 1 and Figure 2 As shown, the housing 1 provided by the present invention is an integral structure, which includes a receiving cavity 11 and a pilot oil outlet channel 13. The receiving cavity 11 extends along the axial direction (i.e., vertical direction) of the housing 1, and includes a first chamber 111 and a second chamber 112 arranged sequentially from bottom to top and interconnected with each other. The first chamber 111 is used to house the main valve assembly of the electromagnetic damping valve. The side wall of the first chamber 111 is provided with a plurality of main valve oil outlets 12 distributed circumferentially. The main valve oil outlets 12 are used to connect the first chamber 111 and the outside of the housing 1, and the oil entering the first chamber 111 from the main valve seat 2 of the main valve assembly can be discharged to the outside of the housing 1 through the main valve oil outlets 12. The second chamber 112 is used to house the armature assembly of the electromagnetic damping valve and the pilot valve core 7 and pilot spring in the pilot valve assembly. At the same time, the second chamber 112 is connected to the pilot oil outlet channel 13, and the oil flowing through the pilot valve core 7 can be discharged to the outside of the housing 1 through the pilot oil outlet channel 13.

[0023] Compared to the separate housings used in existing electromagnetic damping valves, this invention integrates the main valve housing (for housing the main valve assembly) and the electromagnetic housing (for housing the armature assembly) into a single integrated housing. The armature assembly, pilot valve assembly, and main valve assembly can be sequentially installed within this integrated housing. This avoids the issues of product precision and manufacturing difficulty arising from the assembly of different parts, while also reducing the number of parts and lowering production costs. The main valve outlet on the housing serves as the main valve passage, and the pilot oil outlet passage serves as the pressure relief passage for the pilot oil circuit, effectively meeting the operational requirements of the electromagnetic damping valve.

[0024] The specific structure of shell 1 is as follows: Figure 1 and Figure 2 As shown, the first chamber 111 has a first countersunk hole 111a at the end away from the second chamber 112, which is used to install the main valve seat 2 of the main valve assembly; the first chamber 111 has a second countersunk hole 111b at the end near the second chamber 112, which is used to install the guide sleeve 5 of the pilot valve assembly. The inner diameters of the first countersunk hole 111a, the middle of the first chamber 111, the second countersunk hole 111b, and the second chamber 112 decrease sequentially.

[0025] Preferably, the oil outlet channel 13 is inclined, with the end closer to the second chamber 112 being higher than the end farther from the second chamber 112. This arrangement is more conducive to the smooth discharge of oil.

[0026] like Figure 1 and Figure 2 As shown, the electromagnetic damping valve provided by the present invention includes a coil, the aforementioned housing 1, and a main valve assembly, a pilot valve assembly, and an armature assembly disposed in the housing 1.

[0027] The main valve assembly includes a main valve seat 2, a main valve piston 3, and a main valve spring 4, arranged sequentially from bottom to top in the first chamber 111. The main valve seat 2 is interference-fitted into the first chamber 111, its position is fixed, and it is limited by the first countersunk hole 111a. The main valve seat 2 has a through-hole 21 for the main valve. The main valve piston 3 is slidably disposed in the first chamber 111, and has an overflow hole at its center, which is connected to the main valve inlet 21. The main valve spring 4 is disposed between the pilot valve assembly and the main valve piston 3. The spring force of the main valve spring 4 presses the main valve piston 3 against the main valve seat 2, so that the main valve outlet 12 is closed or has a very small opening. The main valve piston 3 slides up and down along the first chamber 111 according to the change in oil pressure in the chamber, thereby changing the opening of the main valve outlet 12.

[0028] A pilot valve assembly is mounted above the main valve assembly and is used to control the opening and closing degree of the main valve assembly. The pilot valve assembly includes a connecting rod 6, a pilot spring, and a pilot valve core 7. The pilot spring and pilot valve core 7 are disposed in the second chamber 112. The connecting rod 6 connects the first chamber 111 and the second chamber 112, and includes an overflow hole connecting the main valve piston 3 to the connecting rod channel 61 connecting the second chamber 112, and a connecting rod side channel 62 connecting the connecting rod channel 61 and the first chamber 111. The pilot spring is disposed between the connecting rod 6 and the pilot valve core 7, and its elastic force can press the pilot valve core 7 tightly against the armature assembly. The main valve spring 4 is disposed between the connecting rod 6 and the main valve piston 3. The pilot valve core 7 is clearance-fitted with the side wall of the second chamber 112 and is slidably disposed within the second chamber 112, which also includes a vertically penetrating pilot valve core oil hole 71. The pilot valve assembly separates the first chamber 111 and the second chamber 112, and the flow of oil from the first chamber 111 to the second chamber 112 can only be achieved through the pilot valve assembly.

[0029] Preferably, the pilot valve assembly further includes a guide sleeve 5, the guide sleeve 5 having a T-shaped vertical cross-section, which is interference-fitted into the first chamber 111 and limits its fit with the second countersunk hole 111b. The guide sleeve 5 is sleeved on the outside of the flow rod 6, its lower surface abutting against the upper end of the main valve spring 4, and its upper surface abutting against the lower end of the pilot spring. Simultaneously, the guide sleeve 5 is also provided with a side flow hole for connecting the connecting rod side channel 62 and the first chamber 111. A back pressure chamber for the main valve piston 3 is formed between the guide sleeve 5 and the main valve piston 3, and the oil entering the connecting rod channel 61 can enter the back pressure chamber through the connecting rod side channel 62 and the side flow hole.

[0030] The armature assembly includes a moving armature 91, a stationary armature 92, and a push rod 8 disposed in the second chamber 112. The stationary armature 92 is press-fitted into the second chamber 112 and its position is fixed. It has an axial channel running vertically through the chamber and a stationary armature oil hole 921 connected to the axial channel. A pilot oil outlet channel 13 connects the stationary armature oil hole 921 to the outside of the housing 1. The lower end of the push rod 8 passes through the axial channel, and its upper end is connected to the moving armature 91. The pilot valve core 7 abuts against the stationary armature 92 under the elastic force of a pilot spring. Preferably, the upper end of the pilot valve core 7 has a pressing protrusion, which is inserted into the lower end of the axial channel to ensure the sealing at the connection between the pilot valve core 7 and the stationary armature 92. An oil passage gap is also provided between the axial channel and the push rod 8, through which oil can enter the stationary armature oil hole 921 and flow to the pilot oil outlet channel 13.

[0031] The coil is sleeved on the housing 1 and located outside the second chamber 112, and is used to drive the push rod 8 to move up and down along the axial channel.

[0032] The electromagnetic damping valve provided by this invention has the following two operating conditions: When the electromagnetic damping valve is de-energized, the oil enters the first chamber 111 from the main valve inlet 21 of the main valve seat 2, and then has two flow paths: the first is through the main valve outlet 12 to the outside of the housing 1; the second is through the overflow hole in the center of the main valve piston 3, with some oil entering the second chamber 112 through the connecting rod channel 61 of the connecting rod 6, and some oil entering the back pressure chamber through the connecting rod side channel 62 and the side flow hole. Because the pilot valve core 7 is in contact with the stationary armature 92 under the elastic force of the pilot spring, the oil cannot enter the oil passage gap. Therefore, the pressure relief channel of the pilot oil circuit is blocked, and the back pressure chamber is filled with high-pressure oil that cannot be relieved. The resulting hydraulic pressure will work together with the main valve spring 4 to press the main valve piston 3 tightly against the main valve seat 2, and the main valve outlet 12 is closed or has a very small opening. At this time, the damping force of the shock absorber is at its maximum.

[0033] like Figure 3 As shown, when the electromagnetic damping valve is energized, the moving armature 91 drives the push rod 8 to push the pilot valve core 7 downward, increasing the distance between the pilot valve core 7 and the stationary armature 92, and they no longer seal against each other. After the oil enters the first chamber 111 from the main valve inlet 21 of the main valve seat 2, there are two flow paths: the first is through the main valve outlet 12 to the outside of the housing 1; the second is through the overflow hole in the center of the main valve piston 3, and part of the oil enters the second chamber 112 through the connecting rod channel 61 of the connecting rod 6, and flows to the outside of the housing 1 through the pilot valve body oil hole 71, the oil passage gap, the stationary armature oil hole 921, and the pilot outlet oil channel 13. Part of the oil enters the back pressure chamber through the connecting rod side channel 62 and the side flow hole. Because the pressure relief channel of the pilot oil circuit is unobstructed, the high-pressure oil entering the back pressure chamber can be released through the pilot valve assembly. The pressure in the back pressure chamber decreases, and the oil inlet pressure at the main valve inlet 21 can overcome the hydraulic pressure in the back pressure chamber and the elastic force of the main valve spring 4, pushing the main valve piston 3 away from the main valve seat 2. This increases the opening of the main valve outlet 12, reducing the damping force of the shock absorber. When different currents are applied to the electromagnetic damping valve, the distance between the pilot valve core 7 and the stationary armature 92 changes with the change of electromagnetic force, and the opening of the main valve outlet 12 changes accordingly, thereby achieving the function of adjusting the damping of the shock absorber.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A housing characterized by, The shell (1) is an integral structure, wherein a containing cavity (11) and a pilot oil outlet channel (13) are arranged, the containing cavity (11) extends along the axial direction of the shell (1) and comprises a first cavity (111) and a second cavity (112) which are communicated with each other; The first cavity (111) is used for containing a main valve assembly of the electromagnetic damping valve, a plurality of main valve oil outlets (12) are arranged on the side wall of the first cavity (111) in a circumferential direction, and the oil liquid entering the first cavity (111) from a main valve seat (2) of the main valve assembly can be discharged to the outside of the shell (1) through the main valve oil outlets (12); The second cavity (112) is used for containing an armature assembly and a pilot valve core (7) in a pilot valve assembly of the electromagnetic damping valve, and the second cavity (112) is communicated with the pilot oil outlet channel (13), and the oil liquid flowing through the pilot valve core (7) can be discharged to the outside of the shell (1) through the pilot oil outlet channel (13).

2. The housing of claim 1, wherein A first counterbore (111a) is arranged at one end of the first cavity (111) away from the second cavity (112), and the first counterbore (111a) is used for mounting the main valve seat (2) of the main valve assembly.

3. The case according to claim 1, characterized by A second counterbore (111b) is arranged at one end of the first cavity (111) close to the second cavity (112), and the second counterbore (111b) is used for mounting a guide sleeve (5) of the pilot valve assembly.

4. An electromagnetic damping valve, characterized by The shell (1) is an integral structure, wherein a containing cavity (11) and a pilot oil outlet channel (13) are arranged, the containing cavity (11) extends along the axial direction of the shell (1) and comprises a first cavity (111) and a second cavity (112) which are communicated with each other; The main valve assembly comprises a main valve seat (2), a main valve piston (3) and a main valve spring (4) arranged in the first cavity (111), the position of the main valve seat (2) is fixed, and a main valve oil inlet (21) is arranged in the main valve seat (2); the main valve piston (3) is slidably arranged in the first cavity (111); The pilot valve assembly comprises a communication rod (6), a pilot spring and a pilot valve core (7), the pilot spring and the pilot valve core (7) are arranged in the second cavity (112), the communication rod (6) is used for communicating the first cavity (111) and the second cavity (112); the pilot spring is arranged between the communication rod (6) and the pilot valve core (7), the main valve spring (4) is arranged between the communication rod (6) and the main valve piston (3); the pilot valve core (7) is provided with a pilot valve core oil hole (71); The armature assembly comprises a moving armature (91), a static armature (92) and a push rod (8) arranged in the second cavity (112), the position of the static armature (92) is fixed, an axial channel and a static armature oil hole (921) communicated with the axial channel are arranged in the static armature (92), the pilot oil outlet channel (13) is used for communicating the static armature oil hole (921) and the outside of the shell (1); one end of the push rod (8) penetrates through the axial channel, and the other end is connected with the moving armature (91); the pilot valve core (7) abuts against the static armature (92) under the elastic action of the pilot spring; The coil is arranged outside the second chamber (112) for driving the push rod (8) to move along the axial channel.

5. An electromagnetic damping valve according to claim 4, characterized in that One end of the pilot valve core (7) is provided with a pressing protrusion which is inserted into the end of the axial channel.

6. An electromagnetic damping valve according to claim 4, characterized in that An oil passing gap is arranged between the axial channel and the push rod (8).

7. An electromagnetic damping valve according to claim 4, characterized in that The pilot valve assembly further comprises a guide sleeve (5) arranged in the first chamber (111), the guide sleeve (5) is sleeved outside the flow passing rod (6) and is in limiting abutment with the main valve spring (4) and the pilot spring respectively.

8. A damper characterized by An electromagnetic damping valve comprising any one of claims 4-7.

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