A shock absorber valve system

Abstract

The present invention relates to a shock absorber valve system, including a restoring valve system fixed at one end of a piston rod and a compression valve system fixed at the bottom of an oil storage cylinder, wherein the restoring valve system includes a support pad, a spring sheet, a first circulation valve sheet, a first throttle valve sheet, a first compression valve seat, a first adjustment gasket, a first valve sheet assembly, a second adjustment gasket, a positioning sleeve, a restoring valve spring seat, a restoring valve spring and a restoring valve nut, and the compression valve system includes a screw, a second valve sheet assembly, a second throttle valve sheet, a second compression valve seat, a second circulation valve sheet, a first compression valve spring, a second compression valve spring and a compression valve nut. For damping adjustment, the shock absorber valve system of the present invention can obtain a higher curvature in the early low-speed section, but at the high-speed end, due to the intervention of the spring, the damping force is difficult to increase significantly, and the slope of the damping curve will decrease, which is close to zero; but this characteristic is also obvious for the protection of the shock absorber.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, in particular to a shock absorber valve system. Background Art

[0002] The existing shock absorber valve system has the characteristics of large adjustable range, good reliability, not too high strength requirements for valve plates, small slope of high-speed characteristic curve, etc. The torque of the restoring valve nut directly affects the preload of the spring and valve plate. The spring-valve-plate composite piston valve has one or more valve plates superimposed at the valve port of the lower part of the piston to form a restoring valve spring group together with the restoring valve spring. The large preload of the coil spring and the high stiffness of the valve plate are fully utilized to combine a wide-coverage spring characteristic to meet the needs of different shock absorber external characteristics. The existing shock absorber valve system has many parts and is complicated to assemble. Summary of the invention

[0003] The object of the present invention is to provide a shock absorber valve system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A shock absorber valve system, comprising a restoring valve system fixed at one end of a piston rod and a compression valve system fixed at the bottom of an oil storage cylinder, wherein the restoring valve system comprises a support pad, a spring sheet, a first flow valve sheet, a first throttle valve sheet, a first compression valve seat, a first adjusting gasket, a first valve sheet assembly, a second adjusting gasket, a positioning sleeve, a restoring valve spring seat, a restoring valve spring and a restoring valve nut, wherein the first adjusting gasket, the first valve sheet assembly, the second adjusting gasket, the positioning sleeve, the restoring valve spring seat and the restoring valve spring are all located inside the first compression valve seat, and the first adjusting gasket, the first valve sheet assembly, the second adjusting gasket, the positioning sleeve, the restoring valve spring seat and the restoring valve spring sleeve connected to the outer periphery of the restoring valve nut, the restoring valve nut penetrates the first compression valve seat and is connected to the piston rod, the restoring valve spring is located between the restoring valve spring seat and the restoring valve nut, the positioning sleeve is located inside the restoring valve spring and is sleeved on the outer periphery of the piston shaft, the second adjusting gasket is located between the restoring valve nut and the positioning sleeve, the first valve plate assembly and the first adjusting gasket are located between the restoring valve spring seat and the first compression valve seat, the first circulation valve plate, the first throttle valve plate, the spring plate and the support pad are located on the side of the first compression valve seat away from the restoring valve nut, and the first circulation valve plate, the first throttle valve plate, the spring plate and the support pad are sleeved on the outer periphery of the piston rod;

[0006] The compression valve system includes a screw rod, a second valve plate assembly, a second throttle valve plate, a second compression valve seat, a second circulation valve plate, a first compression valve spring, a second compression valve spring and a compression valve nut. The second valve plate assembly, the second throttle valve plate and the second circulation valve plate are located inside the second compression valve seat, and the second valve plate assembly, the second throttle valve plate and the second circulation valve plate are sleeved on the outer periphery of the screw rod. The first compression valve spring and the second compression valve spring are both sleeved on the outer periphery of the screw rod. The screw rod passes through the second compression valve seat and is connected to the compression valve nut. The second compression valve seat is fixed inside the oil storage cylinder.

[0007] Preferably, the first valve sheet assembly is composed of multiple valve sheets.

[0008] Preferably, the second valve sheet assembly is composed of a plurality of valve sheets.

[0009] Preferably, the first adjustment gasket is provided with a plurality of first throttling grooves in the circumferential direction.

[0010] Preferably, a plurality of second throttling grooves are provided on the circumference of the second throttling valve plate.

[0011] Preferably, the number of the second throttling grooves is smaller than the number of the first throttling grooves.

[0012] Preferably, the first compression valve seat is provided with a plurality of first through holes, the second compression valve seat is provided with a plurality of second through holes, and the number of the first through holes is greater than the number of the second through holes.

[0013] Preferably, a plurality of shielding portions are provided on the inner periphery of the first compression valve spring.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the shock absorber valve system of the present invention can obtain a higher curvature in the early low-speed section for damping adjustment, but at the high-speed end, due to the intervention of the spring, the damping force is difficult to increase significantly, and the slope of the damping curve will decrease, almost to zero; but this characteristic is also obvious in protecting the shock absorber.

[0015] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the restoring valve in the shock absorber valve system of the present invention;

[0017] Figure 2 An exploded view of a restoring valve in a shock absorber valve system according to the present invention;

[0018] Figure 3 It is a structural schematic diagram of a compression valve in the shock absorber valve system of the present invention;

[0019] Figure 4 It is an exploded view of the compression valve in the shock absorber valve system of the present invention.

[0020] In the figure: 1. Restoration valve system; 101. Support pad; 102. Spring sheet; 103. First circulation valve sheet; 104. First throttle valve sheet; 105. First compression valve seat; 106. First adjustment gasket; 107. First valve sheet assembly; 108. Restoration valve spring seat; 109. Positioning sleeve; 110. Second adjustment gasket; 111. Restoration valve spring; 112. Restoration valve nut; 113. First throttling groove; 114. First through hole; 2. Compression valve system; 201. Screw; 202. Second valve sheet assembly; 203. Second throttling valve sheet; 204. Second compression valve seat; 205. Second circulation valve sheet; 206. First compression valve spring; 207. Second compression valve spring; 208. Compression valve nut; 209. Second throttling groove; 210. Second through hole; 211. Shielding portion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 4In an embodiment of the present invention, a shock absorber valve system includes a restoring valve system 1 fixed at one end of a piston rod (not shown) and a compression valve system 2 fixed at the bottom of an oil storage cylinder (not shown), wherein the restoring valve system 1 includes a support pad 101, a spring plate 102, a first flow valve plate 103, a first throttle valve plate 104, a first compression valve seat 105, a first adjusting gasket 106, a first valve plate assembly 107, a second adjusting gasket 110, a positioning sleeve 109, a restoring valve spring seat 108, a restoring valve spring 111 and a restoring valve nut 112, wherein the first adjusting gasket 106, the first valve plate assembly 107, the second adjusting gasket 110, the positioning sleeve 109, the restoring valve spring seat 108 and the restoring valve spring 111 are all located inside the first compression valve seat 105, and the first adjusting gasket 106, the first valve plate assembly 107, the second adjusting gasket 110, the positioning sleeve 109, the restoring valve spring seat 108 and the restoring valve spring 111 are all located inside the first compression valve seat 105, and the first adjusting gasket 106, the first valve plate assembly 107, the second adjusting gasket 110, the positioning sleeve 109, the restoring valve spring seat 108 and the restoring valve spring 111 are sleeved on the outer periphery of the restoring valve nut 112, the restoring valve nut 112 passes through the first compression valve seat 105 and is connected to the piston rod, the restoring valve spring 111 is located between the restoring valve spring seat 108 and the restoring valve nut 112, the positioning sleeve 109 is located inside the restoring valve spring 111 and is sleeved on the outer periphery of the piston shaft, the second adjusting gasket is located between the restoring valve nut 112 and the positioning sleeve 109, the first valve plate assembly 107 and the first adjusting gasket 106 are located between the restoring valve spring seat 108 and the first compression valve seat 105, the first circulation valve plate 103, the first throttle valve plate 104, the spring plate 102 and the support pad 101 are located on the side of the first compression valve seat 105 away from the restoring valve nut 112, and the first circulation valve plate 103, the first throttle valve plate 104, the spring plate 102 and the support pad 101 are sleeved on the outer periphery of the piston rod.

[0023] The compression valve system 2 includes a screw rod 201, a second valve plate assembly 202, a second throttle valve plate 203, a second compression valve seat 204, a second circulation valve plate 205, a first compression valve spring 206, a second compression valve spring 207 and a compression valve nut 208. The second valve plate assembly 202, the second throttle valve plate 203 and the second circulation valve plate 205 are located inside the second compression valve seat 204, and the second valve plate assembly 202, the second throttle valve plate 203 and the second circulation valve plate 205 are sleeved on the outer periphery of the screw rod 201. The first compression valve spring 206 and the second compression valve spring 207 are both sleeved on the outer periphery of the screw rod 201. The screw rod 201 passes through the second compression valve seat 204 and is connected to the compression valve nut 208. The second compression valve seat 204 is fixed inside the oil storage cylinder.

[0024] The first valve plate assembly 107 is composed of a plurality of valve plates. The second valve plate assembly 202 is composed of a plurality of valve plates. The first adjustment gasket 106 is provided with a plurality of first throttle grooves 113 in the circumferential direction. The second throttle valve plate 203 is provided with a plurality of second throttle grooves 209 in the circumferential direction. The number of the second throttle grooves 209 is less than the number of the first throttle grooves 113. The first compression valve seat 105 is provided with a plurality of first through holes 114, and the second compression valve seat 204 is provided with a plurality of second through holes 210, and the number of the first through holes 114 is greater than the number of the second through holes 210. The inner circumference of the first compression valve spring 206 is provided with a plurality of shielding portions 211.

[0025] When in use, the characteristic curve of the shock absorber valve system is controlled in three levels:

[0026] Restoration valve system control:

[0027] Level 1 control: Rely on design to control the size parameters of the first throttle groove (such as the thickness of the first adjustment gasket and the width, number of grooves, i.e., the slot area of ​​the first throttle groove);

[0028] Level 2 control: Rely on design to control the stiffness of the restoring valve spring, the stiffness of the first valve plate assembly, and the preload of the first valve plate assembly;

[0029] Level 3 control: depends on the channel opening on the designed valve system (such as the aperture and number of holes on the piston and the first compression valve seat, i.e. the flow hole area).

[0030] Compression valve control:

[0031] Level 1 control: Rely on design to control the size parameters of the second throttle groove (the thickness and groove width of the second throttle valve plate, the number of grooves, i.e. the total groove area; the second throttle groove can also be engraved on the oil line of the piston or valve seat); the smaller the total area of ​​the normally through hole, the greater the damping force generated by the level 1 control; conversely, the larger the total area, the smaller the damping force generated by the level 1 control.

[0032] 2-level control: relying on the design to control the stiffness of the second compression valve spring or the stiffness of the first compression valve spring, and the preload of the second flow valve plate;

[0033] The greater the stiffness of the first compression valve spring and the second compression valve spring or the valve plate stiffness and the preload of the valve plate, the greater the damping force generated by the two-stage control; conversely, the smaller the stiffness, the smaller the damping force generated by the two-stage control;

[0034] The greater the compression amount of the first compression valve spring and the second compression valve spring, the greater the damping force generated, and vice versa.

[0035] Level 3 control: depends on the channel opening of the designed valve system (such as the aperture and number of holes on the piston and compression valve seat, i.e. the flow hole area). The larger the flow hole area, the smaller the damping force generated, and vice versa.

[0036] With regard to damping adjustment, the shock absorber valve system of the present invention can obtain a higher curvature in the early low-speed section, but at the high-speed end, due to the intervention of the spring, the damping force is difficult to increase significantly, and the slope of the damping curve will decrease, almost to zero; but this characteristic is also obvious in protecting the shock absorber.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A shock absorber valve system, comprising a restoring valve system fixed to one end of a piston rod and a compression valve system fixed to the bottom of an oil storage cylinder, characterized in that: The reset valve system includes a support pad, a spring plate, a first flow valve plate, a first throttle valve plate, a first compression valve seat, a first adjusting gasket, a first valve plate assembly, a second adjusting gasket, a positioning sleeve, a reset valve spring seat, a reset valve spring and a reset valve nut. The first adjusting gasket, the first valve plate assembly, the second adjusting gasket, the positioning sleeve, the reset valve spring seat and the reset valve spring are all located inside the first compression valve seat, and the first adjusting gasket, the first valve plate assembly, the second adjusting gasket, the positioning sleeve, the reset valve spring seat and the reset valve spring are sleeved on the outer periphery of the reset valve nut. The reset valve nut penetrates The first compression valve seat is connected to the piston rod, the restoring valve spring is located between the restoring valve spring seat and the restoring valve nut, the positioning sleeve is located inside the restoring valve spring and is sleeved on the outer periphery of the piston shaft, the second adjusting gasket is located between the restoring valve nut and the positioning sleeve, the first valve plate assembly and the first adjusting gasket are located between the restoring valve spring seat and the first compression valve seat, the first circulation valve plate, the first throttle valve plate, the spring plate and the support pad are located on the side of the first compression valve seat away from the restoring valve nut, and the first circulation valve plate, the first throttle valve plate, the spring plate and the support pad are sleeved on the outer periphery of the piston rod; The compression valve system includes a screw rod, a second valve plate assembly, a second throttle valve plate, a second compression valve seat, a second circulation valve plate, a first compression valve spring, a second compression valve spring and a compression valve nut. The second valve plate assembly, the second throttle valve plate and the second circulation valve plate are located inside the second compression valve seat, and the second valve plate assembly, the second throttle valve plate and the second circulation valve plate are sleeved on the outer periphery of the screw rod. The first compression valve spring and the second compression valve spring are both sleeved on the outer periphery of the screw rod. The screw rod passes through the second compression valve seat and is connected to the compression valve nut. The second compression valve seat is fixed inside the oil storage cylinder. The first valve sheet assembly is composed of a plurality of valve sheets; The second valve sheet assembly is composed of a plurality of valve sheets; The first adjusting gasket is provided with a plurality of first throttling grooves in the circumferential direction; The second throttle valve plate is provided with a plurality of second throttle grooves on the circumference thereof; The number of the second throttling grooves is less than the number of the first throttling grooves; The first compression valve seat is provided with a plurality of first through holes, and the second compression valve seat is provided with a plurality of second through holes, and the number of the first through holes is greater than the number of the second through holes; A plurality of shielding parts are arranged on the inner periphery of the first compression valve spring.

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