Variable load control system in a hydraulic device
A hydraulic device includes a tubular housing, inside of which a rod is jointly attached to a piston separating upper and lower areas which hold hydraulic fluid so that, as the piston and rod move, the piston and the rod move together relatively and axially inside the tubular housing, displacing the hydraulic fluid inside the tubular housing, flowing from one of the upper and lower areas to the other of the upper and lower areas, and thus changing the respective volumes inside the upper and lower areas. The hydraulic device further includes a modular mechanism located inside the lower area that regulates shock absorption at a maximum level of compression of the hydraulic device, as well as in other relative positions.
1. A variable load control system in a hydraulic device, wherein the hydraulic device comprises a tubular housing, wherein a rod is attached to a piston separating upper and lower areas filled with hydraulic fluid so that, as the piston and the rod move, the rod and the piston travel together relative to an axis inside the tubular housing, displace the hydraulic fluid inside the tubular housing from one of the upper area and the lower area to the other of the upper area and the lower area, and thus change respective volumes inside the upper area and the lower area; wherein the piston is configured to move in the hydraulic device towards a position of maximum compression such that the volume of the lower area is progressively reduced, wherein the hydraulic device adopts a rest position when the hydraulic device is at maximum extension; and
wherein:
the variable load control system comprises a modular mechanism located inside the lower area of the tubular housing, and sealed with a lid at a bottom thereof;
the upper and lower areas are directly connected through a series of through perforations in the piston;
the modular mechanism comprises an upper tubular head with a lower tube directly fitted and guided so as to be capable of sliding, with an annular support fitted on a bottom end thereof, within the upper tubular head and having axial mobility when the upper tubular head travels down towards the position of maximum compression in the hydraulic device, and when the upper tubular head travels up in an opposite direction towards a position of maximum extension of the hydraulic device;
the upper tubular head has a series of through slots on walls thereof that connect an inner chamber, that is enclosed by inner sides of the lower tube and the upper tubular head, with an outer annular chamber that is defined by the inner side of the tubular housing and outer sides of the upper tubular head and the lower tube;
the annular support has a series of through holes that connect the inner chamber to the outer annular chamber;
the through holes of the annular support face a frontal disc attached to the lid; and
a combination of the through holes of the annular support and the frontal disc defines a valve device that regulates passage of hydraulic fluid in and out of the through holes of the annular support when a lower side of the annular support approaches the lid to contact the frontal disc and moves away from the lid to separate from the frontal disc.
2. The variable load control system in a hydraulic device, according to claim 1 , wherein the through holes of the annular support face the lid; and wherein a combination of the through holes of the annular support and the lid defines a valve device that regulates passage of hydraulic fluid in and out of the through holes of the annular support when a lower side of the annular support contacts the lid.
3. The variable load control system in a hydraulic device, according to claim 1 , wherein the annular support fits, so as to be capable of sliding, against the inner side of the tubular housing.
4. The variable load control system in a hydraulic device, according to claim 3 , wherein one of lower sides of the annular support comprises a lower recess where the through holes lead into.
5. The variable load control system in a hydraulic device, according to claim 3 , wherein one of upper sides of the annular support comprises an upper recess where a bottom end of the lower tube is fitted.
6. The variable load control system in a hydraulic device, according to claim 1 , wherein the through slots of the upper tubular head comprise a series of through slots that extend to a lower rim of the upper tubular head.
7. The variable load control system in a hydraulic device, according to claim 6 , wherein the upper tubular head of the modular mechanism is attached to the piston.
8. The variable load control system in a hydraulic device, according to claim 6 , wherein the upper tubular head of the modular mechanism and the piston are two independent and separate components.
9. The variable load control system in a hydraulic device, according to claim 6 , wherein the modular mechanism further comprises a compression coaxial spring connected on both ends to the annular support and to a series of radial extensions on the upper tubular head, the radial extensions fitting against the inner side of the tubular housing, so that the upper tubular head axially moves both against a resistance of the compression coaxial spring when the upper tubular head travels down to the position of maximum compression of the hydraulic device, as well as when the upper tubular head travels up in the opposite direction towards the position of maximum extension of the hydraulic device when the compression coaxial spring tends to move the upper tubular head up along the axis, with the compression coaxial spring being located inside the outer annular chamber.
10. The variable load control system in a hydraulic device, according to claim 9 , wherein the rod integrates a lower extension that reaches below the piston where, in some positions of the shock absorber device, the lower extension fits loosely inside the lower tube, the loose fitting defining an annular passage of hydraulic fluid.
11. The variable load control system in a hydraulic device, according to claim 1 , wherein the rod integrates a lower extension that reaches below the piston where, in some positions of the shock absorber device, the lower extension fits loosely inside the lower tube, the loose fitting defining an annular passage of hydraulic fluid.
12. The variable load control system in a hydraulic device, according to claim 10 , wherein the upper tubular head has a tapered upper mouth.
13. The variable load control system in a hydraulic device, according to claim 8 , wherein the upper tubular head of the modular mechanism includes an area with lower superficial hardness than an area of the piston that the upper tubular head is connected to, such that initial contact between part of the piston and the upper tubular head when the piston and the upper tubular head approach each other is cushioned by the area with lower superficial hardness.
14. The variable load control system in a hydraulic device, according to claim 8 , wherein the area with lower superficial hardness is defined by an annular component attached to an upper rim of the upper tubular head.
15. The variable load control system in a hydraulic device, according to claim 7 , wherein an assembly of the lower tube and the annular support is connected to the tubular housing by interference fit such that the annular support is fixed to the tubular housing.