Damping force variable valve assembly and damping force variable shock absorber including same

Abstract

The invention provides a damping force variable valve assembly and a damping force variable shock absorber including the same. The damping force variable valve assembly includes: an integrated soft valve port having one end connected to a shock absorber, a connection passage through which a working fluid from the shock absorber flows, and a valve disk disposed on a bottom surface of the integrated soft valve port to be in close contact with the bottom surface of the integrated soft valve port; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of a front end of the valve housing being coupled to an outer circumferential surface of the integrated soft valve port; and a main valve portion disposed in the valve housing below the integrated soft valve port.

Description

Technical Field

[0001] The present disclosure relates to a damping force variable valve assembly and a damping force variable shock absorber including the damping force variable valve assembly, and more particularly, to a damping force variable valve assembly that is easy to assemble and can reduce the overall size and a damping force variable shock absorber including the damping force variable valve assembly. Background Art

[0002] Generally speaking, shock absorbers are installed on vehicles such as cars, and improve ride comfort by absorbing and damping vibrations or impacts transmitted from the road during driving.

[0003] Each shock absorber includes a piston rod installed in a cylinder to achieve compression and rebound strokes, and a piston valve coupled to the piston rod and located in the cylinder to generate a damping force.

[0004] When the damping force is set low, the shock absorbers can improve ride comfort by absorbing vibrations caused by road irregularities.

[0005] Recently, a damping force variable shock absorber capable of setting different damping force characteristics according to the purpose of use of the vehicle is applied to a vehicle.

[0006] The variable damping force shock absorber further includes a variable damping force valve assembly for adjusting the damping force, and the variable damping force shock absorber can switch the damping force between a hard mode and a soft mode, in which the valve core of the solenoid valve closes the auxiliary channel to generate a high damping force, and in which the valve core opens the auxiliary channel to generate a low damping force.

[0007] Figure 1 2 is a view showing a damping force variable shock absorber according to a related art.

[0008] The damping force variable shock absorber according to the related art includes a cylinder 10 having an outer cylinder 11 and an inner cylinder 12 , a piston rod 13 , a piston valve 14 , a reservoir chamber 15 , a partition pipe 16 , and a damping force variable valve assembly 100 .

[0009] The damping force variable valve assembly 100 is installed at the outer side of the outer cylinder 11 , and the inner cylinder 12 is installed at the inner side of the outer cylinder 11 at a predetermined interval.

[0010] In addition, a reservoir chamber 15 is formed between the outer cylinder 11 and the inner cylinder 12 to form a low pressure chamber PL and a high pressure chamber PH.

[0011] By having one end coupled to a piston valve 14 located inside the inner cylinder 12, the piston rod 13 reciprocates in the compression and rebound stroke directions.

[0012] When the piston valve 14 is connected to one end of the piston rod 13, the inner cylinder 12 is divided into a compression chamber 12a and a rebound chamber 12b in the longitudinal direction, and in this state, when the piston rod 13 reciprocates in the compression and rebound stroke directions, a damping force is generated due to the resistance of the fluid.

[0013] The reservoir chamber 15 is provided in a space between the outer cylinder 11 and the inner cylinder 12 .

[0014] The partition pipe 16 is disposed between the outer cylinder 11 and the inner cylinder 12, specifically, is disposed on the outer surface of the inner cylinder 12 to form an inner high-pressure chamber PH and an outer low-pressure chamber PL.

[0015] That is, the partition pipe 16 divides the interior of the reservoir chamber 15 into a low-pressure chamber PL and a high-pressure chamber PH.

[0016] A body valve 17 is installed at the bottom of the inner cylinder 12 and controls the flow of working fluid between the reservoir chamber 15 and the compression chamber 12 a to generate a damping force.

[0017] On the other hand, the high-pressure chamber PH is connected to the rebound chamber 12b through the inner hole 12c provided in the inner cylinder 12, while the low-pressure chamber PL is connected to the compression chamber 12a through the lower passage formed between the body valve 17 and the outer cylinder 11 and the passage (not shown) formed in the body valve 17.

[0018] Figure 2 It is shown in Figure 1 A view of the structure of a variable damping force valve assembly used in a variable damping force shock absorber, Figure 3 yes Figure 2 A magnified view of the port and soft valve section in the Figure 4 It is shown from Figure 3 View of the state with the valve mounting removed.

[0019] The damping force variable valve assembly 100 according to the related art includes a port 110 , a valve housing 120 , a soft valve portion 130 , a main valve portion 140 , a safety valve portion 150 , and a solenoid valve portion 160 .

[0020] The front end of the port 110 is connected to the high pressure chamber PH through the outer cylinder 11 and the partition pipe 16, and a connection passage 111 is formed to pass through the port 110 in the front-rear direction so that the working fluid from the high pressure chamber PH can flow into the variable valve assembly.

[0021] That is, the inlet of the connection passage 111 is connected to the high pressure chamber PH, and the outlet of the connection passage 111 is connected to the guide chamber 123 and the valve seat chamber 125 of the valve housing 120 .

[0022] A gasket 113 for fixing may be provided on the outside of the port 110 .

[0023] In addition, a protrusion horizontally protruding from each of both lower sides of the port 110 is formed on the bottom surface of the support portion 115 , and the protrusion contacts the upper surface of the soft valve body 131 .

[0024] Such a protrusion seals the area between the port 110 and the soft valve body 131 .

[0025] The valve housing 120 is made of a cylindrical metal material, and the soft valve portion 130 , the main valve portion 140 , and the safety valve portion 150 may be sequentially assembled in an inner hollow space of the valve housing 120 .

[0026] The hollow inner space of the valve housing 120 may be partitioned by a plate-shaped valve seat 121 .

[0027] The valve housing 120 has a guide chamber 123 disposed above the valve base 121 , and has a valve seat chamber 125 disposed below the valve base 121 , and the two chambers 123 and 125 may communicate with each other through a base hole 122 disposed on the valve base 121 .

[0028] The guide chamber 123 forms a relatively wider space than the valve seat chamber 125 .

[0029] The guide chamber 123 forms a plurality of steps on the inner surface of the hollow in the longitudinal direction, and the soft valve portion 130 and the main valve portion 140 are sequentially disposed on each of the plurality of steps starting from the inlet of the port.

[0030] At the middle height of the valve housing 120 where the main valve portion 140 is located, a plurality of channel holes 126 for forming a main channel are provided along a circumferential direction so that the inside and the outside of the valve housing 120 can communicate with each other.

[0031] The volume of the valve seat chamber 125 is smaller than the volume of the pilot chamber 123 , and the safety valve portion 150 is located inside the valve seat chamber 125 .

[0032] The soft valve portion 130 communicates with the connection passage 111 of the port 110 so that the fluid passing through the port 110 first passes through the valve housing 120 .

[0033] The soft valve portion 130 includes a soft valve body 131 , a valve disc 133 , and a valve mounting member 135 .

[0034] The soft valve body 131 is provided in a cylindrical shape, the valve mounting member 135 passes through the center of the soft valve body 131 , and at least one soft passage 132 passes through the soft valve body 131 in a circumferential direction.

[0035] The valve disc 133 is provided in a plate shape, and is provided at the bottom surface of the soft valve body 131 , for example, at the opposite side of the port 110 to be in close contact with the soft valve body 131 .

[0036] The valve disc 133 may be installed as a stack of multiple valve discs.

[0037] The valve mounting member 135 is coupled to the soft valve body 131 , thereby supporting the valve disc 133 to keep the soft passage 132 in a normally closed state.

[0038] The valve mounting member 135 may be provided as a rivet or a pin and coupled to the soft valve body 131 .

[0039] The soft valve portion 130 is coupled to an inlet-side end of the valve housing 120 to selectively allow communication between the port 110 and the guide chamber 123 .

[0040] In particular, since the soft valve portion 130 is configured as a single independent component, the degree of freedom of debugging can be greatly improved, for example, in a soft mode for adjusting the damping force at a low speed, the damping force of the main valve portion required by personalized design can be minimized.

[0041] The main valve portion 140 is accommodated in the guide chamber 123 of the valve housing 120 , and may include a valve seat 141 , a valve body 143 , and a valve spring 145 .

[0042] The valve seat 141 is arranged in an annular shape.

[0043] In addition, the valve seat 141 may be supported on the locking claw 127 provided in the inner surface of the valve housing 120 using the step provided at the outer side of the valve seat 141 .

[0044] The lower end of the valve seat 141 selectively contacts the upper end of the valve body 143 , and communicates with a main passage between the guide chamber 123 and the valve housing 120 .

[0045] The valve body 143 is coupled to the guide chamber 123 such that the valve body 132 is vertically movable.

[0046] The valve body 143 includes a disc-shaped valve body disc 143 a , and an upper edge 143 b and a lower edge 143 c extending upward and downward from the valve body disc 143 a , respectively.

[0047] The valve body disc 143a has a valve body hole 144 at the center for communicating the front and rear of the valve body disc 143a.

[0048] The upper end of the upper edge 143 b selectively contacts or separates from the lower end of the valve seat 141 , and the lower end of the lower edge 143 c is elastically supported toward the port side via the valve spring 145 .

[0049] The valve spring 145 may be provided in a coil spring shape.

[0050] The safety valve portion 150 is disposed in the valve seat chamber 125 , and the safety valve portion 150 is disposed between the valve housing 120 and the solenoid valve portion 160 .

[0051] The solenoid valve portion 160 is driven by current transmitted from the outside, and the solenoid valve portion 160 moves the protruding rod 162 forward and backward using an electromagnetic force generated by coil excitation when current is supplied.

[0052] In addition, a bypass passage 170 is provided between the valve housing 120 and the solenoid valve portion 160 .

[0053] The bypass passage 170 connects the inside of the valve seat chamber 125 and the reservoir chamber 15 .

[0054] Specifically, the bypass channel 170 has an inlet connected to the inner side of the valve seat chamber 125 and an outlet connected to the low pressure chamber PL of the reservoir chamber 15, so that the working fluid of the valve seat chamber 125 moves to the low pressure chamber PL in hard mode, soft mode and fail mode.

[0055] However, in the conventional damping force variable valve assembly configured as described above, the port 110 and the soft valve portion 130 are separately provided, and thus sealing is required between the port 110 and the soft valve body 131 .

[0056] This therefore results in an increased number of parts, a complicated assembly process, and an increased size of the valve assembly. Summary of the invention

[0057] The present disclosure is made to solve the above-mentioned various problems of the related art, and particularly, provides a damping force variable valve assembly that is easy to assemble and capable of reducing the overall size, and a damping force variable shock absorber including the same.

[0058] In order to achieve the above-mentioned objectives, the present disclosure can provide a variable damping force valve assembly, comprising: an integrated soft valve port having one end connected to a shock absorber, a connecting channel for a working fluid from the shock absorber to flow through, and a valve disc arranged at the bottom surface of the integrated soft valve port to be in close contact with the bottom surface of the integrated soft valve port; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of the front end of the valve housing is connected to an outer circumferential surface of the integrated soft valve port; and a main valve portion arranged in the valve housing below the integrated soft valve port.

[0059] A fitting hole may be formed at the center of the integrated soft valve port and passing through the center, and a valve mounting member for fixing the valve disc may be fitted into the fitting hole.

[0060] The valve disc may be provided in the form of a stack of multiple discs.

[0061] When the connecting passage is in a normally closed state, the valve disc is coupled to the bottom surface of the integrated soft valve port.

[0062] The connecting channel may be formed in plural.

[0063] The integrated soft valve port may include: a main body, formed in a disc shape with a predetermined thickness, the main body having an assembly hole and a connecting channel, the assembly hole being formed in the center of the main body to pass through the center and allow a valve mounting member for fixing the valve disc to be assembled in the assembly hole, the connecting channel being formed on the outside of the assembly hole; and a split body, having a predetermined thickness, the split body extending horizontally along the circumference of the lower end of the main body, and having a protrusion formed in the bottom surface of the split body to contact the upper surface of the valve disc.

[0064] The split body may include: a first split body extending horizontally along a circumference of a lower end of the main body and protruding downward along a lower surface edge; and a second split body extending downward along a bottom surface edge of the first split body.

[0065] The bottom surface of the main body and the bottom surface of the first split body may be located on the same plane.

[0066] The valve disc may be located in a mounting groove formed between an inner circumferential surface of the second split body and bottom surfaces of the main body and the first split body.

[0067] Support portions protruding horizontally at predetermined intervals in a circumferential direction may be formed at an outer circumferential surface of the second split body.

[0068] Preferably, the supporting portions are provided as three supporting portions and are arranged at intervals of 120° in the circumferential direction.

[0069] The outer circumferential surface of the support portion may contact the inner circumferential surface of the valve housing, and the bottom surface of the support portion may contact the upper surface of the main valve portion, so that the integrated soft valve port maintains a stable state in the valve housing.

[0070] The connection passage formed in the body may be formed in plural numbers at the outer side of the fitting hole in the circumferential direction.

[0071] The valve mounting may be provided in the form of a rivet or a pin.

[0072] In another aspect, the present disclosure may provide a variable damping force valve assembly, comprising: an integrated soft valve port having one end connected to a shock absorber, a valve disc arranged at the bottom surface of the integrated soft valve port and arranged to be stacked, an assembly hole for assembling a valve mounting member for fixing the valve disc, and a connecting channel formed in a circumferential direction on the outer side of the assembly hole so that a working fluid from the shock absorber is introduced; a valve housing having a hollow cylindrical shape, an inner circumferential surface of the front end of the valve housing being connected to the outer circumferential surface of the integrated soft valve port; and a main valve portion arranged in the valve housing below the integrated soft valve port.

[0073] When the connecting passage is in a normally closed state, the valve disc is coupled to the bottom surface of the integrated soft valve port.

[0074] The integrated soft valve port may include: a main body, formed in a disc shape with a predetermined thickness, the main body having an assembly hole and a connecting channel, the assembly hole being formed in the center of the main body to pass through the center and allow a valve mounting member for fixing the valve disc and to be assembled into the assembly hole, the connecting channel being formed on the outside of the assembly hole; and a split body, having a predetermined thickness, split and extending horizontally along the circumference of the lower end of the main body, and having a protrusion formed in the bottom surface of the split body so as to contact the upper surface of the valve disc.

[0075] The split body may include: a first split body extending horizontally along a circumference of a lower end of the main body and protruding downward along a lower surface edge; and a second split body extending downward along a bottom surface edge of the first split body.

[0076] The bottom surface of the main body and the bottom surface of the first sub-body may be located on the same plane, and the valve disc may be located in a mounting groove formed between the inner circumferential surface of the second sub-body and the bottom surfaces of the main body and the first sub-body.

[0077] Support portions protruding horizontally at predetermined intervals in the circumferential direction may be formed on the outer circumferential surface of the second split body.

[0078] Preferably, the supporting portions are provided as three supporting portions, and are arranged at intervals of 120° along the circumferential direction.

[0079] An outer circumferential surface of the support portion may contact an inner circumferential surface of the valve housing, and a bottom surface of the support portion may contact an upper surface of the main valve portion, so that the integrated soft valve port maintains a stable state within the valve housing.

[0080] The connection passage formed in the body may be formed in plural in the outer side of the fitting hole in the circumferential direction.

[0081] The valve mounting may be provided in the form of a rivet or a pin.

[0082] In another aspect, the present disclosure may provide a variable damping force valve assembly, comprising: an integrated soft valve port having one end connected to a shock absorber, a valve disc arranged on the bottom surface of the integrated soft valve port and arranged as a plurality of stacked discs, an assembly hole for assembling a valve mounting member for fixing the valve disc, and a connecting channel formed along a circumferential direction on the outer side of the assembly hole to allow fluid to be introduced from the shock absorber; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of the front end being connected to the outer circumferential surface of the integrated soft valve port; and a main valve portion arranged below the integrated soft valve port in the valve housing.

[0083] When the connecting passage is in a normally closed state, the valve disc is coupled to the bottom surface of the integrated soft valve port.

[0084] The integrated soft valve port may include: a main body, formed in a disc shape with a predetermined thickness, having an assembly hole formed in the center of the main body to pass through the center and allow assembly of a valve mounting member for fixing the valve disc, and a connecting channel formed on the outside of the assembly hole; and a split body, having a predetermined thickness, extending horizontally along the circumference of the lower end of the main body, and having a protrusion formed in the bottom surface of the split body so as to contact the upper surface of the valve disc.

[0085] The split body may include: a first split body extending horizontally along a circumference of a lower end of the main body and protruding downward along a lower surface edge; and a second split body extending downward along a bottom surface edge of the first split body.

[0086] The bottom surface of the main body and the bottom surface of the first sub-body may be located on the same plane, and the valve disc may be located in a mounting groove formed between the inner circumferential surface of the second sub-body and the bottom surfaces of the main body and the first sub-body.

[0087] In another aspect, the present disclosure provides a variable damping force shock absorber including the variable damping force valve assembly.

[0088] Detailed descriptions of other examples are included in the "Detailed Description" and "Drawings".

[0089] The advantages and / or technical features of the present disclosure and methods for obtaining the advantages and / or technical features will become more apparent by referring to the accompanying embodiments.

[0090] However, the present disclosure is not limited to the construction of the embodiments described below, but may be embodied in various other forms. Each embodiment disclosed in this specification is intended to be illustrative only, and it will be understood by those skilled in the art that various changes may be made to the form and details thereof without departing from the spirit and scope of the present disclosure as defined in the claims.

[0091] According to the above, the present disclosure has the following effects.

[0092] The present disclosure has the following effects: by providing an integrated soft valve port in which a conventional valve port and a conventional soft valve portion are integrally formed, assembling of a valve assembly is facilitated and the overall size of the valve assembly is reduced.

[0093] As a result, the following demands of the automotive industry can be met: to simplify not only the suspension system but also the structure of the steering and driving systems; to reduce the size of the damper to improve ride comfort; and to adjust stability and ensure interior space. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] Figure 1 is a view showing a damping force variable shock absorber according to the related art.

[0095] Figure 2It is shown in Figure 1 A view of the structure of a variable damping force valve assembly used in a variable damping force shock absorber.

[0096] Figure 3 yes Figure 2 Magnified view of the port and soft valve section.

[0097] Figure 4 It is shown Figure 3 View of the state with the valve mounting removed.

[0098] Figure 5 is a view showing a damping force variable shock absorber according to the present disclosure.

[0099] Figure 6 It is shown in Figure 5 A view of the structure of a variable damping force valve assembly used in a variable damping force shock absorber.

[0100] Figure 7 yes Figure 6 Magnified view of the integrated soft valve port in the .

[0101] Figure 8 It is shown Figure 7 View of the state with the valve mounting removed.

[0102] Fig. 9 It is shown from Figure 8 A view of the integrated soft valve port with the valve disc removed.

[0103] Description of Reference Numerals

[0104] 10: Cylinder

[0105] 11: Outer cylinder

[0106] 12: Inner cylinder

[0107] 13: Piston rod

[0108] 14: Piston valve

[0109] 15: Reservoir

[0110] 16: Separator tube

[0111] 17: Body valve

[0112] 200: Variable damping force valve assembly

[0113] 210: Integral soft valve port

[0114] 211: Main body

[0115] 213: Split

[0116] 215: Support

[0117] 217: Valve disc

[0118] 219: Valve mounting

[0119] 220: Valve housing

[0120] 230: Main valve

[0121] 240: Solenoid valve DETAILED DESCRIPTION

[0122] Hereinafter, preferred embodiments of the damping force variable valve assembly and the damping force variable shock absorber including the damping force variable valve assembly according to the present disclosure will be described in detail based on the accompanying drawings. For reference, the terms and words used in the present disclosure and the claims of the present disclosure should not be understood as being limited to the meaning of the words, but should be understood as appropriate concepts proposed by the inventor based on the fact that he can define the terms to describe his disclosure in the best way for others to understand. In addition, the embodiments and drawings described in the present disclosure are merely the most preferred embodiments and do not represent all the technical spirits of the present disclosure, and it is understood that various modifications and equivalent schemes may be made to replace the embodiments when submitting this application.

[0123] Figure 5 is a view showing a damping force variable shock absorber according to the present disclosure.

[0124] The damping force variable shock absorber according to the present disclosure includes a cylinder 10 having an outer cylinder 11 and an inner cylinder 12 , a piston rod 13 , a piston valve 14 , a reservoir chamber 15 , a separation pipe 16 , and a damping force variable valve assembly 200 .

[0125] The damping force variable valve assembly 200 is installed at the outer side of the outer cylinder 11 , and the inner cylinder 12 is installed at the inner side of the outer cylinder 11 at a predetermined interval.

[0126] In addition, a reservoir chamber 15 is formed between the outer cylinder 11 and the inner cylinder 12 to form a low pressure chamber PL and a high pressure chamber PH.

[0127] By having one end coupled to a piston valve 14 located inside the inner cylinder 12, the piston rod 13 reciprocates in the compression and rebound stroke directions.

[0128] When the piston valve 14 is connected to one end of the piston rod 13, the inner cylinder 12 is divided into a compression chamber 12a and a rebound chamber 12b in the longitudinal direction, and when the piston rod 13 reciprocates in the compression and rebound stroke directions, a damping force is generated due to the resistance of the fluid.

[0129] The reservoir chamber 15 is provided in the space between the outer cylinder 11 and the inner cylinder 12 .

[0130] The partition pipe 16 is disposed between the outer cylinder 11 and the inner cylinder 12, specifically, is disposed on the outer surface of the inner cylinder 12 to form an inner high-pressure chamber PH and an outer low-pressure chamber PL.

[0131] That is, the partition pipe 16 divides the interior of the reservoir chamber 15 into a low-pressure chamber PL and a high-pressure chamber PH.

[0132] The body valve 17 is installed at the bottom of the inner cylinder 12, and controls the flow of the working fluid between the reservoir chamber 15 and the compression chamber 12a to generate a damping force.

[0133] On the other hand, the high-pressure chamber PH is connected to the rebound chamber 12b through the inner hole 12c provided in the inner cylinder 12, and the low-pressure chamber PL is connected to the compression chamber 12a through the lower passage formed between the body valve 17 and the outer cylinder 11 and the passage (not shown) formed in the body valve 17.

[0134] Figure 6 It is shown Figure 5 A view of the structure of a variable damping force valve assembly used in a variable damping force shock absorber.

[0135] The damping force variable valve assembly 200 according to the present disclosure may include an integrated soft valve port 210 , a valve housing 220 , a main valve portion 230 , and a solenoid valve portion 240 .

[0136] One end of the integrated soft valve port 210 is connected to the shock absorber, the connecting channel 211b passes through the integrated soft valve port 210 so that the working fluid flows out of the shock absorber, and the valve disc 217 is set on the bottom surface of the integrated soft valve port 210 and is in close contact with the bottom surface of the integrated soft valve port 210.

[0137] A fitting hole 211 a may be formed in the center of the integrated soft valve port 210 and pass through the center thereof, and a valve mounting member 219 in the form of a rivet or a pin may be fitted in the fitting hole 211 a to fix the valve disc 217 .

[0138] In addition, when the connection channel 211 b formed in the integrated soft valve port 210 is in a normally closed state, the valve disc 217 may be coupled to the bottom surface of the integrated soft valve port 210 .

[0139] In addition, the connection channel 211 b of the integrated soft valve port 210 may be formed in plural.

[0140] The valve housing 220 has a hollow cylindrical shape, and an inner circumferential surface of a front end of the valve housing 220 is coupled to an outer circumferential surface of the integrated soft valve port 210 .

[0141] The main valve portion 230 is disposed below the integrated soft valve port 210 in the valve housing 220 .

[0142] The integrated soft valve port 210 of the damping force variable valve assembly 200 according to the present disclosure is a port in which a port and a soft valve portion in a conventional variable damping valve assembly are formed integrally, thereby facilitating assembly of the valve assembly 200 and reducing the overall size of the valve assembly 200 .

[0143] In the damping force variable valve assembly 200 according to the present disclosure, except for the integrated soft valve port 210, the remaining components such as the valve housing 220, the main valve part 230 and the solenoid valve part 240 are the same as the components in the related art, so the description of these components will be omitted herein.

[0144] Figure 7 yes Figure 6 Enlarged view of the integrated soft valve port, Figure 8 It is shown from Figure 7 a view of the valve mounting being removed, and Fig. 9 It is shown from Figure 8 View of the soft valve port with the valve disc removed.

[0145] The integrated soft valve port 210 may include a main body 211 , a split body 213 , a support portion 215 , a valve disc 217 and a valve mounting member 219 .

[0146] The main body 211 is formed into a disc shape with a predetermined thickness, and an assembly hole 211a is formed at the center of the main body 211 and passes through the center. A valve mounting member 219 in the form of a pin or rivet for fixing the valve disc 217 is assembled in the assembly hole 211a, and a connecting channel 211b is formed on the outside of the assembly hole 211a.

[0147] In this case, a plurality of connection channels 211 b formed in the body 211 may be disposed outside the fitting hole 211 a in a circumferential direction.

[0148] The split body 213 has a predetermined thickness and extends horizontally in a circumferential direction of a lower end of the main body 211 , and a protrusion 213 b is formed on a bottom surface of the split body 213 to contact an upper surface of the valve disc 217 .

[0149] The split body 213 may include a first split body 213a extending horizontally along the circumference of the lower end of the main body 211 and having a protrusion 213b protruding downward along the bottom surface edge; and a second split body 213c extending downward along the bottom surface edge of the first split body 213a.

[0150] In this case, it is preferred that the bottom surface of the main body 211 and the bottom surface of the first split body 213 a are located on the same plane.

[0151] In addition, in the mounting groove 213d formed between the inner circumferential surface of the second split body 213c and the bottom surfaces of the main body 211 and the first split body 213a, a plurality of valve discs 217 each having a plate form may be in a stacked state.

[0152] In addition, support parts 215 protruding horizontally at predetermined intervals in the circumferential direction may be formed in the outer circumferential surface of the second split body 213 c .

[0153] Preferably, the support portions 215 are provided in three portions and are arranged at intervals of 120° along the circumferential direction.

[0154] In this case, the outer circumferential surface of the support portion 215 contacts the inner circumferential surface of the valve housing 220 , and the bottom surface of the support portion 215 contacts the upper surface of the main valve portion 230 , so that the integrated soft valve port 210 maintains a stable state in the valve housing 220 .

[0155] When the minimum number of support parts 215 is provided as described above, the manufacturing cost including the molding cost can be reduced while maintaining durability.

[0156] The valve disc 217 may be provided in the form of a plurality of stacked plate-like discs.

[0157] A through hole (not shown) is formed at a central position of the valve disc 217 so that a valve mounting member 219 in the form of a pin or a rivet can be fitted into the through hole.

[0158] The valve mount 219 may be fitted into a fitting hole 211 a formed on the body 211 and a through hole (not shown) formed on the valve disc 217 .

[0159] As described above, the present disclosure provides an integrated soft valve port 210 in which a conventional port and a conventional soft valve portion are integrally formed, and thus, it is possible to facilitate assembly of the valve assembly 200 and reduce the overall size of the valve assembly 200 .

[0160] As a result, the following demands of the automotive industry can be met: requirements for simplifying not only the suspension system but also the steering and driving system structures; reducing the size of the damper to improve ride comfort; and adjusting stability and ensuring interior space.

[0161] The above-mentioned present disclosure is not limited to the embodiments and drawings, and it is obvious to those skilled in the art that various substitutions, modifications and changes can be made within the technical concept scope of the present disclosure without departing from the scope of the present disclosure.

Claims

1. A variable damping force valve assembly, include: an integrated soft valve port having one end connected to the shock absorber, a connection passage through which a working fluid from the shock absorber flows, and a valve disc disposed at a bottom surface of the integrated soft valve port to be in close contact with the bottom surface of the integrated soft valve port; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of a front end of the valve housing being coupled to an outer circumferential surface of the integrated soft valve port; as well as The main valve portion is arranged in the valve housing below the integrated soft valve port.

2. The variable damping force valve assembly according to claim 1, in, A fitting hole is formed at the center of the integrated soft valve port passing through the center, and a valve mounting member for fixing the valve disc is fitted into the fitting hole.

3. The variable damping force valve assembly according to claim 2, in, The valve disc is provided in the form of a stack of multiple discs.

4. The variable damping force valve assembly according to claim 3, in, The valve disc is coupled to the bottom surface of the integrated soft valve port when the connecting passage is in a normally closed state.

5. The variable damping force valve assembly according to claim 1, in, The connecting channel is formed in plurality.

6. The variable damping force valve assembly according to claim 1, in, The integrated soft valve port comprises: a body formed in a disc shape having a predetermined thickness, the body having a fitting hole formed at a center of the body to pass through the center and allow a valve mounting member for fixing the valve disc to be fitted into the fitting hole, and a connection passage formed outside the fitting hole; and A split body having a predetermined thickness horizontally extends along a circumference of a lower end of the main body and has a protrusion formed in a bottom surface of the split body to contact an upper surface of the valve disc.

7. The variable damping force valve assembly according to claim 6, in, The split body comprises: a first split body extending horizontally along the circumference of the lower end of the main body and protruding downward along the edge of the lower surface; and The second split body extends downward along an edge of a bottom surface of the first split body.

8. The variable damping force valve assembly according to claim 7, in, The bottom surface of the main body and the bottom surface of the first split body are located on the same plane.

9. The variable damping force valve assembly according to claim 7, in, The valve disc is located in a mounting groove formed between an inner circumferential surface of the second split body and bottom surfaces of the main body and the first split body.

10. The variable damping force valve assembly according to claim 7, in, Support portions are formed on the outer circumferential surface of the second split body so as to protrude horizontally at predetermined intervals in the circumferential direction.

11. The variable damping force valve assembly according to claim 10, in, The supporting portions are provided as three supporting portions and are arranged at intervals of 120° along the circumferential direction.

12. The variable damping force valve assembly according to claim 11, in, An outer circumferential surface of the support portion contacts an inner circumferential surface of the valve housing, and a bottom surface of the support portion contacts an upper surface of the main valve portion, so that the integrated soft valve port maintains a stable state within the valve housing.

13. The variable damping force valve assembly according to claim 6, in, The connection passage formed in the body is formed in plurality at an outer side of the fitting hole along the circumferential direction.

14. The variable damping force valve assembly according to claim 6, in, The valve mounting is provided in the form of a rivet or a pin.

15. A variable damping force valve assembly, include: an integrated soft valve port having one end connected to a shock absorber, a valve disc provided on a bottom surface of the integrated soft valve port and provided as a stacked plurality of discs, a fitting hole for fitting a valve mounting member for fixing the valve disc, and a connecting passage formed in a circumferential direction outside the fitting hole so that a working fluid from the shock absorber is introduced; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of a front end of the valve housing being coupled to an outer circumferential surface of the integrated soft valve port; as well as The main valve portion is arranged in the valve housing below the integrated soft valve port.

16. The variable damping force valve assembly according to claim 15, in, The valve disc is coupled to a bottom surface of the integrated soft valve port when the connecting passage is in a normally closed state.

17. The variable damping force valve assembly according to claim 15, in, The integrated soft valve port comprises: a body formed in a disc shape having a predetermined thickness, the body having a fitting hole formed at a center of the body to pass through the center and allow a valve mounting member for fixing the valve disc to be fitted into the fitting hole, and a connection passage formed at an outer side of the fitting hole; and A split body having a predetermined thickness horizontally extends along a circumference of a lower end of the main body and has a protrusion formed in a bottom surface of the split body to contact an upper surface of the valve disc.

18. The variable damping force valve assembly according to claim 17, in, The split body comprises: a first split body extending horizontally along the circumference of the lower end of the main body and protruding downward along the edge of the lower surface; and The second split body extends downward along an edge of a bottom surface of the first split body.

19. The variable damping force valve assembly according to claim 18, in: The bottom surface of the main body and the bottom surface of the first split body are located on the same plane; The valve disc is located in a mounting groove formed between an inner circumferential surface of the second split body and bottom surfaces of the main body and the first split body.

20. A variable damping force shock absorber comprising a variable damping force valve assembly, in, The variable damping force valve assembly comprises: an integrated soft valve port having one end connected to the shock absorber, a connection passage formed in the integrated soft valve port to allow a working fluid from the shock absorber to flow therethrough, and a valve disc disposed at a bottom surface of the integrated soft valve port to be in close contact with the bottom surface of the integrated soft valve port; a valve housing having a hollow cylindrical shape, and an inner circumferential surface of a front end of the valve housing being coupled to an outer circumferential surface of the integrated soft valve port; and a main valve portion, disposed in the valve housing below the integrated soft valve port, The integrated soft valve port comprises: a body formed in a disc shape of a predetermined thickness, the body having a fitting hole formed at the center of the body to pass through the center and allow a valve mounting member for fixing the valve disc to be fitted into the fitting hole, and a connection passage formed at an outer side of the fitting hole; and A split body having a predetermined thickness horizontally extends along a circumference of a lower end of the main body and has a protrusion formed in a bottom surface of the split body to contact an upper surface of the valve disc.

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