Shock absorber with hydraulic load regulation simultaneously depending on speed and frequency
The present disclosure relates to a shock absorber with hydraulic load regulation with a rod ending in a pin, which incorporates a longitudinal channel such that the shock absorber includes a frequency amplifier which, in turn, includes a housing, a floating piston which slides along the inside of the housing achieving a seal, and a pressure control valve, wherein the pressure control valve is configured to open when the amplifier chamber reaches a certain pressure level, enabling the outlet of fluid from the amplifier chamber such that the pressure of the amplifier chamber acts on the floating piston, which moves to regulate the flow of fluid through the piston by means of an elastic element acting on valves.
1. A shock absorber with hydraulic load regulation simultaneously depending on speed and frequency comprising a rod with an end ending in a pin of the rod, to which a piston, separating a traction chamber from a compression chamber inside the shock absorber, is joined and comprising a through hole which enables communication between the traction chamber and the compression chamber, wherein the pin of the rod comprises a longitudinal channel and wherein the shock absorber comprises: a channel
a primary valve,
a secondary valve,
a guide bushing fixed to the pin of the rod, embracing a portion of the channel and enabling fluid to pass through the channel between the two ends of the guide bushing,
an elastic element embracing the guide bushing, and
a frequency amplifier, comprising:
a housing, fixed to the pin of the rod, configured by a base and a concentric wall with respect to the pin of the rod,
a floating piston capable of sliding between the guide bushing and the wall of the housing, achieving a seal during the sliding, comprising a stepped base that, along with the guide bushing and the housing, configures an amplifier chamber, and
a pressure control valve
wherein:
the primary valve is located in contact with the piston,
the secondary valve is located in contact with the primary valve by means of a spacer, and with the elastic element,
the elastic element is in contact with the floating piston,
the guide bushing is joined to the housing at one end, enabling hydraulic communication between the channel and the amplifier chamber, and
the pressure control valve incorporates a permanent opening that enables an outlet of fluid from the amplifier chamber and is configured to open when the amplifier chamber reaches a certain pressure level, enabling an outlet of fluid from the amplifier chamber with a higher flow rate,
such that the pressure of the amplifier chamber acts on the floating piston, which moves to press the elastic element, which in turn acts on the secondary valve and regulates the opening of the primary valve up to a certain pressure level, controlled by the pressure control valve, in a form selected between a pressure-limiting valve and a pressure-regulating valve.
2. The shock absorber according to claim 1 , wherein the primary valve and the secondary valve are to be selected between being embedded between the piston and the guide bushing and embracing the guide bushing.
3. The shock absorber according to claim 2 , wherein deformation of the primary valve is defined by the configuration of an element to be selected between:
the elastic element,
the secondary valve,
the spacer located between the primary and the secondary valves,
the location of a stop limiter along a length of the guide bushing,
an activation value of the pressure-regulating valve, and
a combination of the above.
4. The shock absorber according to claim 3 , wherein attachment of the guide bushing to the housing is carried out by means of a configuration to be selected between the incorporation of a relief disc and a castellated finish of the end of the guide bushing, wherein at least one narrow duct is provided.
5. The shock absorber according to claim 3 , wherein the elastic element is an assembly of disc springs that can be configured in terms of elasticity, outer diameter and number.
6. The shock absorber according to claim 3 , wherein the spacer can be configured in terms of outer diameter and thickness.
7. The shock absorber according to claim 1 , wherein the housing comprises a passageway partially closed by the pressure-regulating valve since there is a second permanent opening, and which opens when a certain pressure is reached in the amplifier chamber.
8. The shock absorber according to claim 7 , wherein the secondary valve can be configured in terms of elasticity and size.
9. The shock absorber according to claim 7 , wherein an outer diameter of the secondary valve is configured according to a pressure that is desired to be exerted on the primary valve.
10. The shock absorber according to claim 1 , wherein:
a diameter of the guide bushing decreases in an intermediate zone of a length thereof to configure a stop limiter, in the form of a step, the end that comes into contact with the housing having the smaller diameter, and
the floating piston comprises a leakage channel that crosses through it, closed by the pressure-limiting valve that leaves a first permanent opening, and a protrusion, in the form of a step, which is complementary to the stop limiter of the guide bushing,
such that:
movement of the floating piston and the pressure on the elastic element are mechanically limited, and
the pressure in the amplifier chamber is limited to a working pressure of the pressure-limiting valve.
11. The shock absorber according to claim 1 , wherein the frequency amplifier is located in a position to be selected between the traction chamber, the compression chamber, and in both.
12. The shock absorber according to claim 1 , wherein the frequency amplifier is located in a valve holder in direct contact with a reserve chamber.