WO2014119388A1 - 緩衝器 - Google Patents
緩衝器 Download PDFInfo
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- WO2014119388A1 WO2014119388A1 PCT/JP2014/050788 JP2014050788W WO2014119388A1 WO 2014119388 A1 WO2014119388 A1 WO 2014119388A1 JP 2014050788 W JP2014050788 W JP 2014050788W WO 2014119388 A1 WO2014119388 A1 WO 2014119388A1
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- WIPO (PCT)
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- valve
- piston
- leaf
- shock absorber
- rib
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
- F16F9/3484—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features of the annular discs per se, singularly or in combination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
Definitions
- the present invention relates to improvements in shock absorbers.
- the shock absorber is used for vehicles, devices, structures and the like.
- a shock absorber has a cylinder in which the working fluid is enclosed, a piston slidingly contacting the inner circumferential surface of the cylinder and partitioning the cylinder into two chambers, and one end connected to the piston
- the other end side includes a piston rod extending out of the cylinder, a flow passage communicating the two chambers, and damping force generation means for giving resistance to the working fluid passing through the flow passage.
- a cylinder is connected to one of a vehicle body side to be damped and a wheel side that is a vibration input unit, and a piston rod is connected to the other of the vehicle body side and the wheel side. It is connected.
- the input of vibration causes the piston to move in the cylinder, and the working fluid of one chamber pressurized by the piston moves to the other chamber through the flow path. Therefore, the shock absorber can generate a damping force due to the resistance of the damping force generating means to suppress the vibration.
- the shock absorber disclosed in JP 04-97133 U includes a piston which is a valve disc which divides two chambers, a flow path which is formed in the piston and which communicates the two rooms, and a window which is formed in the piston and which the flow path is connected
- a valve seat formed on the piston and surrounding the outer periphery of the window, a plurality of ring-plate-shaped leaf valves stacked on the piston, and an inner leaf valve and an outer leaf valve disposed approximately in the middle of the leaf valves; Is equipped.
- the leaf valve, the inner leaf valve and the outer leaf valve are damping force generating means for providing resistance to the working fluid passing through the flow path.
- the outer leaf valve is disposed on the outer periphery of the inner leaf valve and is formed thicker than the inner leaf valve. Therefore, in the shock absorber disclosed in JP 04-97133 U, the leaf valve stacked on the side opposite to the piston from the outer leaf valve is given initial deflection to set the valve opening pressure of the leaf valve high and the piston speed is medium. When in the high speed region, a large damping force can be generated.
- the shock absorber can generate a damping force due to the resistance of the orifice.
- An object of the present invention is to provide a shock absorber capable of providing an initial deflection to a leaf valve and forming an orifice with a simple structure.
- a shock absorber comprising a valve disc for dividing two chambers, a flow path formed on the valve disc and communicating the two rooms, and a window formed on the valve disc and connected to the flow path. And a valve seat formed on the valve disc and surrounding the outer periphery of the window, and a plurality of ring-plate shaped leaf valves stacked on the valve disc, and the first leaf valve stacked on the valve disc is The outer peripheral portion is provided so as to be able to be seated on and detached from the valve seat, and at a position facing the valve seat, the valve disc side is recessed and a rib projecting toward the opposite valve disc side is provided.
- FIG. 1 is a longitudinal cross-sectional view showing a piston portion in a shock absorber according to an embodiment of the present invention, and shows a cross section taken along line Y1-Y1 in FIG.
- FIG. 2 is a view on arrow X1-X1 in FIG.
- FIG. 3A is a plan view of the first extension leaf valve in the shock absorber according to the embodiment of the present invention.
- FIG. 3B is an end view taken along line Z1-Z1 of FIG. 3A.
- FIG. 4 is a sectional view taken along line Y2-Y2 in FIG. 5, and shows a piston portion in a shock absorber according to another embodiment of the present invention.
- FIG. 5 is a view on arrow X2-X2 in FIG. FIG.
- FIG. 6A is a plan view of a first extension leaf valve in a shock absorber according to another embodiment of the present invention.
- 6B is an end view taken along line Z2-Z2 of FIG. 6A.
- FIG. 7A is a plan view showing a modification of the first extending leaf valve according to the embodiment of the present invention.
- FIG. 7B is an end view taken along line Z3-Z3 of FIG. 7A.
- FIG. 8A is a plan view showing a first modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 8B is an end view taken along line Z4-Z4 of FIG. 8A.
- FIG. 9A is a plan view showing a second modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 9A is a plan view showing a second modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 9B is an end view taken along line Z5-Z5 of FIG. 9A.
- FIG. 10A is a plan view showing a third modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 10B shows an example of an end face of the Z6-Z6 line cutting portion of FIG. 10A.
- FIG. 10C shows another example of the end face of the Z6-Z6 line cutting portion of FIG. 10A.
- FIG. 11A is a plan view showing a fourth modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 11B shows an example of the end face of the Z7-Z7 line cutting portion in FIG. 11A.
- FIG. 11C shows another example of the end face of the Z7-Z7 line cutting portion in FIG. 11A.
- FIG. 11A is a plan view showing a third modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 10B shows an example of an end face of the Z6
- FIG. 12A is a plan view showing a fifth modification of the first extending leaf valve according to the other embodiment of the present invention.
- FIG. 12B shows an example of the end face of the Z8-Z8 line cutting portion of FIG. 12A.
- FIG. 12C shows another example of the end face of the Z8-Z8 line cutting portion of FIG. 12A.
- a shock absorber S1 includes a piston (valve disc) 1 that divides an expansion chamber L1 and a compression chamber L2 (two chambers), and an expansion chamber formed in the piston 1
- a valve seat 12 and a plurality of annular plate-like extended side leaf valves (leaf valves) 2a to 2c stacked on the piston 1 are provided.
- the first extension leaf valve 2 a is a rib that is recessed on the piston side (valve disc side) at a position facing the valve seat 12 and protrudes on the opposite side of the piston (opposite piston side (anti-valve disc side)) It has 3A.
- the shock absorber S1 is an upright single cylinder type hydraulic shock absorber interposed between a car body and a wheel of an automobile, and a liquid such as oil, water, an aqueous solution or the like as a working fluid. Accommodate.
- the cylinder 4 connected to the wheel side, the piston 1 slidingly contacting the inner circumferential surface of the cylinder 4, and one end of the piston 1 with a nut N
- the piston rod 5 is connected and the other end side extends outside the cylinder 4 and is connected to the vehicle body side, an annular rod guide (not shown) fixed to the vehicle body side open end of the cylinder 4, and It has a free piston (not shown) in sliding contact with the inner circumferential surface on the piston rod side, and a bottom cap (not shown) for closing the wheel side opening of the cylinder 4.
- the piston rod 5 passes through the axial center of the rod guide and is axially movably supported by the rod guide.
- An annular seal in sliding contact with the outer peripheral surface of the piston rod 5 is fixed to the inner periphery of the rod guide. The seal seals the space between the rod guide and the cylinder 4.
- a working fluid is accommodated between the rod guide and the free piston to form a fluid chamber L.
- a gas is enclosed between the free piston and the bottom cap to form an air chamber (not shown).
- the fluid chamber L is divided into two chambers by the piston 1. Of the two chambers, the chamber on the piston rod side (upper side in FIG. 1) is the expansion side chamber L1, and the chamber on the opposite side of the piston rod (lower side in FIG. 1) opposite to the piston rod is the pressure side chamber L2.
- the in-cylinder volume change corresponding to the volume of the piston rod that appears in the cylinder at the time of expansion and contraction of the shock absorber S1 is compensated by an air chamber (not shown).
- the piston 1 in sliding contact with the inner circumferential surface of the cylinder 4 is a valve disc that divides the expansion side chamber L1 and the pressure side chamber L2, which are two chambers.
- the piston 1 is formed with extension side and pressure side flow paths 10, 14 that communicate the extension side chamber L1 and the pressure side chamber L2.
- the piston 1 surrounds the outer periphery of the window 15 with the opening window 13 in which the starting end of the flow passage 10 on the expansion side is continuous, the window 15 in which the end of the flow channel 14 on the compression side is continuous,
- a valve seat 16 is formed to separate the window 15 and the opening window 13.
- the piston 1 encloses an opening window 17 in which the starting end of the pressure-side flow passage 14 is continuous with the pressure-side chamber side (lower side in FIG. 1), a window 11 in which the end of the expansion side flow passage 10 is continuous, and the outer periphery of the window 11
- the valve seat 12 which divides the window 11 and the opening window 17 is formed.
- the extension window side opening window 13 connected to the extension channel 10 is opened to the extension chamber L1, and always keeps the extension chamber L1 in communication with the extension channel 10.
- the pressure-side chamber side opening window 17 connected to the pressure-side flow passage 14 is opened to the pressure-side chamber L2, and the pressure-side chamber L2 and the pressure-side flow passage 14 are always communicated.
- a plurality of valve seats 12 surrounding the pressure side chamber side window 11 connected to the extension side flow path 10 are arranged in a petal shape along the circumferential direction of the piston 1.
- Each of the valve seats 12 is fan-shaped to individually define the outlets of the plurality of extension side flow paths 10.
- Each valve seat 12 is formed by connecting a pair of radial seat surfaces 12a and 12b extending outward from the center side of the piston 1 (a direction away from the center of the piston 1) and the outer ends of the radial seat surfaces 12a and 12b. And an outer sheet surface 12c formed in an arc shape on the outer peripheral side.
- the valve seat 16 surrounding the window 15 on the expansion side connected to the pressure side flow path 14 is also configured similarly to the valve seat 12.
- FIG. 1 shows a state in which the extension side leaf valves 2a to 2c and the pressure side leaf valves 7a to 7c are provided three by three, the number of laminated leaf valves can be changed as appropriate. .
- the first leaf valve 2a, 7a positioned closest to the piston among the expansion side and the pressure side leaf valves 2a through 2c, 7a through 7c has its outer peripheral portion seated on the valve seats 12, 16 It shows the state of In this state, the expansion side leaf valves 2a to 2c close the outlet of the expansion side channel 10, and the pressure side leaf valves 7a to 7c close the outlet of the pressure side channel 14.
- the pressure in the expansion chamber L1 exceeds the pressure in the compression chamber L2 and the differential pressure between the two chambers reaches the valve opening pressure
- the outer peripheral portions of the expansion side leaf valves 2a to 2c are bent to the opposite side and the first expansion
- the side leaf valve 2 a separates from the valve seat 12 and opens the flow path 10 on the expansion side.
- the first leaf valve 2a is formed with an annular rib 3A which is recessed on the piston side and protrudes on the opposite side as shown in FIG.
- initial deflection according to the height of the rib 3A is given to the second and subsequent extension-side leaf valves 2b and 2c.
- the rib 3A is set to intersect the radial direction sheet surfaces 12a and 12b of the valve seat 12 on the pressure side chamber side. That is, in the first leaf valve 2a, as shown in FIG. 2, when the leaf valve 2a stacked on the piston 1 is viewed from the axial direction, the rib 3A is in the radial direction of the valve seat 12 on the pressure side chamber side.
- the rib 3A forms an orifice between the radial seat surfaces 12a and 12b of the valve seat 12 in a state where the outer peripheral portion of the first extension leaf valve 2a is seated on the valve seat 12.
- the rib 3A always communicates the expansion side chamber L1 with the pressure side chamber L2 through the orifice.
- the rib 3A is formed by sandwiching a material between a pair of tools, such as pressing, and plastically deforming the material into a tool shape. Therefore, at the same time as the piston side is lowered, the opposite side of this portion can be easily protruded to the opposite side, and the rib 3A can be easily formed on the leaf valve 2a. As long as the piston side of the leaf valve 2a can be recessed and the opposite side of this portion can be protruded to the opposite side, the method of forming the rib is not limited to the above, and can be selected appropriately. .
- the shock absorber S1 generates an expansion-side low-speed damping force due to the resistance of the orifice formed by the rib 3A.
- the shock absorber S1 when the piston speed is in the middle and high speed region, the shock absorber S1 generates the expansion middle high speed damping force resulting from the resistance by the expansion side leaf valves 2a to 2c. Since the initial deflection is given to the second and subsequent extension-side leaf valves 2b and 2c by the rib 3A, it is possible to increase the high-speed damping force during the extension.
- the threshold value of each region can be set arbitrarily.
- the shock absorber S1 is a piston (valve disc) 1 that divides the expansion side chamber L1 and the pressure side chamber L2 (two chambers), and an expansion side flow path formed in the piston 1 and communicating the expansion side chamber L1 and the pressure side chamber L2.
- a (flow passage) 10 a window 11 formed in the piston 1 and having an extension-side flow passage 10 connected, a valve seat 12 formed in the piston 1 and surrounding the outer periphery of the window 11, and a plurality of layers stacked on the piston 1
- An annular plate-like extended side leaf valve (leaf valve) 2a to 2c is provided.
- the first extension leaf valve 2 a is provided so as to be able to be seated on the valve seat 12.
- the first extension leaf valve 2 a is provided with a rib 3 A at a position facing the valve seat 12, in which the piston side (valve disc side) is recessed and which protrudes in the opposite piston side (anti valve disc side).
- valve seat 12 includes radial seat surfaces 12 a and 12 b extending outward (in a direction away from the piston) from the center side of the piston (valve disc) 1.
- the rib 3A has an annular shape and is formed so as to axially overlap with the radial sheet surfaces 12a and 12b.
- the rib 3A can be disposed at a position facing the valve seat 12.
- shock absorber S2 according to another embodiment of the present invention will be described.
- differences from the above embodiment will be mainly described, and the same components as those of the shock absorber S1 of the above embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.
- the shock absorber S2 according to another embodiment differs from the shock absorber S1 only in the shape of the piston and the rib, and the other configuration and the operation of the shock absorber S2 are similar.
- the piston 6 is a valve disc that divides the expansion side chamber L1 and the pressure side chamber L2, which are two chambers.
- the piston 6 is formed with extension side and pressure side flow passages 60, 64 for communicating the extension side chamber L1 and the pressure side chamber L2.
- the piston 6 surrounds the outer periphery of the window 65 by the opening window 63 in which the start end of the flow passage 60 on the expansion side is continuous, the window 65 in which the end of the flow passage 64 on the compression side is continuous
- a valve seat 66 defining the window 65 and the opening window 63 is formed.
- the piston 6 surrounds an opening window 67 in which the starting end of the pressure side flow path 64 is connected to the pressure side chamber side (lower side in FIG. 4), a window 61 in which the end of the expansion side flow path 60 is continuous, and the outer periphery of the window 61
- a valve seat 62 is formed which separates the window 61 and the opening window 67.
- the extension window side opening window 63 connected to the extension channel 60 is opened to the extension chamber L1, and always keeps the extension chamber L1 in communication with the extension channel 60.
- the pressure-side chamber side opening window 67 connected to the pressure-side flow passage 64 is opened to the pressure-side chamber L2, and the pressure-side chamber L2 and the pressure-side flow passage 64 are always communicated.
- valve seat 62 surrounding the pressure side chamber side window 61 connected to the extension side flow passage 60 is formed in an annular shape, and the outlets of all the plurality of extension side flow passages 60 are integrated.
- valve seat 66 surrounding the window 65 on the expansion side connected to the flow path 64 on the pressure side is also configured in the same manner as the valve seat 62 described above.
- the rib 3B is the first extension side of the plurality of annular plate-shaped extension-side leaf valves 2a to 2c stacked on the pressure-side chamber side of the piston 6 located closest to the piston Is formed on the leaf valve 2a.
- the rib 3B is formed so as to be recessed on the piston side and to protrude on the opposite side of the piston. For this reason, as shown in FIG. 4, initial deflection corresponding to the height of the rib 3B is given to the second and subsequent extension-side leaf valves 2b and 2c, similarly to the shock absorber S1.
- the rib 3B is formed in an elliptical ring shape, and the upper and lower portions 30, 31 in FIG. 6 are disposed on the center side of the first extending leaf valve 2a. , 33 extend outward (in a direction away from the center of the piston 6).
- the rib 3B is set to intersect with the seat surface of the valve seat 62 on the pressure side chamber side as shown in FIG. That is, when the leaf valve 2a stacked on the piston 1 is viewed from the axial direction, the rib 3B is formed so as to overlap the seat surface of the valve seat 62 on the pressure side chamber side.
- the shock absorber S2 is formed by a piston (valve disc) 6 that divides the expansion side chamber L1 and the pressure side chamber L2 (two chambers), and the piston 6 to form the expansion side chamber L1 and the pressure side chamber L2.
- a flow path (flow path) 60 on the communicating side a window 61 formed in the piston 6 and connected with the flow path 60 on the extending side, a valve seat 62 formed on the piston 6 and surrounding the outer periphery of the window 61, the piston And a plurality of annular plate-like extended side leaf valves (leaf valves) 2a to 2c stacked on one another.
- the first extension leaf valve 2 a stacked on the piston 6 is provided so as to be able to be seated on the valve seat 62.
- the first extending leaf valve 2 a is provided with a rib 3 B at a position facing the valve seat 62, in which the piston side (valve disc side) is recessed and which protrudes in the opposite piston side (anti valve disc side).
- the shock absorber S2 As described above, by forming the ribs 3B on the first extension side leaf valve 2a and providing the initial deflection to the extension side leaf valves 2b and 2c and forming an orifice, it is possible to form the shock absorber S2 It is possible to simplify the structure.
- the valve seat 62 is formed in an annular shape.
- the rib 3B is set to extend outward from the center side of the first extending leaf valve 2a (a direction away from the center of the leaf valve 2a) and to intersect the valve seat 62.
- shock absorbers S1 and S2 are shock absorbers for automobiles in the above-described embodiments, they may be shock absorbers for other vehicles or shock absorbers for vehicles other than vehicles. .
- the shock absorbers S1 and S2 are upright single cylinder type liquid pressure shock absorbers, and the in-cylinder volume change corresponding to the volume of the piston rod which appears in the cylinder in the air chamber not shown The working fluid volume change due to the change can be compensated.
- the shock absorbers S1 and S2 include a reservoir that contains the working fluid and the gas, and a base member that defines the reservoir and the pressure side chamber L2, and the reservoir internal volume change and the working fluid volume change It may be compensated.
- the leaf valves in which the ribs 3A and 3B are formed are the expansion side leaf valves 2a, and are stacked on the pistons 1 and 6 of the shock absorbers S1 and S2.
- the shock absorbers S1 and S2 include a base member
- the base member may be a valve disc
- leaf valves having ribs 3A and 3B formed on the base member may be stacked.
- shock absorbers S1 and S2 may be double-tube type shock absorbers including an outer cylinder disposed outside the cylinder 4 and forming a reservoir between the outer cylinder and the cylinder 4 as a working fluid It may be an air pressure shock absorber utilizing the above, or an inverted shock absorber.
- the shapes of the ribs 3A and 3B formed on the first extending leaf valve 2a and the shapes of the valve seats 12 and 62 on which the outer peripheral portion of the leaf valve 2a is seated are not limited to those described above, and may be appropriately selected. It is possible.
- the annular rib 3A formed on the first extending leaf valve 2a in the shock absorber S1 may be formed to be double or triple in the radial direction. In this case, it is possible to increase the cracking point by adding the rib.
- a petaloid rib 3 ⁇ / b> C may be provided inside the annular rib 3 ⁇ / b> A in the first expanded leaf valve 2 a. In this case, it is possible to easily increase the rigidity of the first leaf valve 2a and to further increase the valve opening pressure of the extension side leaf valves 2a to 2c.
- the shape of the rib 3B formed on the first extending leaf valve 2a in the shock absorber S2 of the other embodiment may be changed as shown in FIGS.
- the rib 3D shown in FIG. 8 is formed in a triangular shape, and the vertex portions 34, 35, 36 extend in a direction (outside) away from the center of the first extending leaf valve 2a.
- the ribs 3E shown in FIG. 9 are formed in a petal shape, and have a plurality of foot portions 37 extending radially outward from the center side of the first extending leaf valve 2a (in a direction away from the center of the leaf valve 2a). Is equipped.
- a plurality of ribs 3F shown in FIG. 10A are formed in an elliptical shape, and a plurality of ribs 3F are provided in the circumferential direction of the first extending leaf valve 2a.
- Each rib 3F is provided to extend in the radial direction of the first extending leaf valve 2a by being formed into an elliptical shape.
- each rib 3F may be formed as a rib in which only the outer portion of the ellipse is recessed toward the piston side and the opposite side protrudes, as shown in FIG. 10C. And may be formed as a rib projecting to the opposite side of the piston.
- a plurality of ribs 3G shown in FIG. 11A are formed in a triangular shape, and provided in plurality along the circumferential direction of the first extending leaf valve 2a.
- Each rib 3G is provided to extend in the radial direction of the first extending leaf valve 2a by being formed in a triangular shape.
- the cut surface of the rib 3G may be formed as a rib in which only the outer portion is recessed in the piston side as shown in FIG. 11B and the opposite side protrudes, or the inner side is also recessed in the piston side as shown in FIG. You may form as a rib which protrudes on the piston side.
- a plurality of ribs 3H shown in FIG. 12A are formed in a line shape (U-shape), and provided in plurality along the circumferential direction of the first extension-side leaf valve 2a.
- Each rib 3H is provided to extend in the radial direction of the first extending leaf valve 2a by being U-shaped.
- the cut surface of the rib 3H may be formed as a rib in which only the outer portion is recessed in the piston side and the opposite side protrudes as shown in FIG. 12B, or the inner side is also recessed in the piston side as shown in FIG. You may form as a rib which protrudes to the side.
- all of the ribs 3D to 3H shown in FIGS. 8 to 12 are recessed on the piston side and protruded on the opposite side as in the rib 3B. Therefore, an orifice can be formed between itself and the valve seat 62, and an initial deflection corresponding to the height of the ribs 3D to 3H can be given to the second and subsequent extension side leaf valves 2b and 2c. Also, like the rib 3B, the ribs 3D to 3H extend from the center side of the first extending leaf valve 2a to the outside (direction away from the center of the leaf valve 2a) and intersect the annular valve seat 62 Is set as.
- the rib 3B can be disposed at a position facing the valve seat 62 without aligning the piston 6 with the first extension leaf valve 2a.
- valve seat shapes to be combined with the ribs 3A to 3H can be arbitrarily set as long as the ribs 3A to 3H and the valve seat always face each other and can be set to form an orifice. Further, combinations of the ribs 3A to 3H are also free, and these may be arbitrarily combined.
- first extending leaf valve 2a is provided with the ribs 3A to 3H, and an orifice is formed between the first and second valve seats 12 and 62. Initial deflection is given to the leaf valves 2b and 2c.
- the ribs 3A to 3H are provided on the first pressure side leaf valve 7a, and an orifice is formed between the valve seats 16 and 66, the second and subsequent pressure side leaf valves 7b and 7c are provided initially. You may give deflection.
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Abstract
Description
Claims (3)
- 緩衝器であって、
二つの部屋を区画するバルブディスクと、
前記バルブディスクに形成され前記二つの部屋を連通する流路と、
前記バルブディスクに形成され前記流路に連なる窓と、
前記バルブディスクに形成され前記窓の外周を囲う弁座と、
前記バルブディスクに積層される複数の環板状のリーフバルブと、を備え、
前記バルブディスクに積層される一枚目の前記リーフバルブは、
外周部が前記弁座に離着座可能に設けられ、
前記弁座と対向する位置には、バルブディスク側が窪むとともに反バルブディスク側に突出するリブを備える緩衝器。 - 請求項1に記載の緩衝器であって、
前記弁座は、前記バルブディスクの中心側から外側に延びる径方向シート面を備え、
前記リブは、前記径方向シート面と軸方向に重なるように円環状に形成される緩衝器。 - 請求項1に記載の緩衝器であって、
前記弁座は、円環状に形成され、
前記リブは、一枚目の前記リーフバルブの中心側から外側に延びて前記弁座と軸方向に重なるように形成される緩衝器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/762,307 US9879747B2 (en) | 2013-01-31 | 2014-01-17 | Shock absorber |
DE112014000635.1T DE112014000635T5 (de) | 2013-01-31 | 2014-01-17 | Stoßdämpfer |
CN201480003959.9A CN104903610B (zh) | 2013-01-31 | 2014-01-17 | 缓冲器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2013-016880 | 2013-01-31 | ||
JP2013016880A JP5997070B2 (ja) | 2013-01-31 | 2013-01-31 | 緩衝器 |
Publications (1)
Publication Number | Publication Date |
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WO2014119388A1 true WO2014119388A1 (ja) | 2014-08-07 |
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PCT/JP2014/050788 WO2014119388A1 (ja) | 2013-01-31 | 2014-01-17 | 緩衝器 |
Country Status (5)
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US (1) | US9879747B2 (ja) |
JP (1) | JP5997070B2 (ja) |
CN (1) | CN104903610B (ja) |
DE (1) | DE112014000635T5 (ja) |
WO (1) | WO2014119388A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2015086093A1 (de) * | 2013-12-13 | 2015-06-18 | Kesseböhmer Produktions GmbH & Co. KG | Sicherheitsbremse für teleskopierbare möbelsäule |
KR101716831B1 (ko) * | 2015-01-29 | 2017-03-15 | 주식회사 만도 | 쇽업소버의 피스톤 밸브 어셈블리 |
JP7002395B2 (ja) * | 2018-04-06 | 2022-01-20 | Kyb株式会社 | バルブ及び緩衝器 |
US10787052B2 (en) * | 2018-07-18 | 2020-09-29 | Ford Global Technologies, Llc | Vehicle tow hook |
KR102475574B1 (ko) * | 2020-11-19 | 2022-12-09 | 에이치엘만도 주식회사 | 일체형 프리로드 디스크 및 이를 포함하는 댐퍼 |
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JP2006183775A (ja) * | 2004-12-27 | 2006-07-13 | Hitachi Ltd | 油圧緩衝器 |
JP2009204147A (ja) * | 2008-02-29 | 2009-09-10 | Hitachi Ltd | 油圧緩衝器 |
JP2009222124A (ja) * | 2008-03-14 | 2009-10-01 | Hitachi Ltd | 流体圧緩衝器 |
JP2011094779A (ja) * | 2009-11-02 | 2011-05-12 | Kyb Co Ltd | バルブ |
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JPH0497133U (ja) | 1991-01-21 | 1992-08-21 | ||
JPH0893830A (ja) * | 1994-09-28 | 1996-04-12 | Unisia Jecs Corp | 液圧緩衝器 |
DE19842840A1 (de) * | 1998-09-18 | 2000-03-23 | Zahnradfabrik Friedrichshafen | Dämpfungsventil |
JP4987283B2 (ja) * | 2005-11-09 | 2012-07-25 | カヤバ工業株式会社 | 緩衝器のバルブ構造および緩衝器 |
-
2013
- 2013-01-31 JP JP2013016880A patent/JP5997070B2/ja active Active
-
2014
- 2014-01-17 US US14/762,307 patent/US9879747B2/en active Active
- 2014-01-17 DE DE112014000635.1T patent/DE112014000635T5/de not_active Withdrawn
- 2014-01-17 WO PCT/JP2014/050788 patent/WO2014119388A1/ja active Application Filing
- 2014-01-17 CN CN201480003959.9A patent/CN104903610B/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006183775A (ja) * | 2004-12-27 | 2006-07-13 | Hitachi Ltd | 油圧緩衝器 |
JP2009204147A (ja) * | 2008-02-29 | 2009-09-10 | Hitachi Ltd | 油圧緩衝器 |
JP2009222124A (ja) * | 2008-03-14 | 2009-10-01 | Hitachi Ltd | 流体圧緩衝器 |
JP2011094779A (ja) * | 2009-11-02 | 2011-05-12 | Kyb Co Ltd | バルブ |
Also Published As
Publication number | Publication date |
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CN104903610A (zh) | 2015-09-09 |
DE112014000635T5 (de) | 2015-11-19 |
JP5997070B2 (ja) | 2016-09-21 |
JP2014149004A (ja) | 2014-08-21 |
US20150354656A1 (en) | 2015-12-10 |
CN104903610B (zh) | 2016-09-07 |
US9879747B2 (en) | 2018-01-30 |
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