TAPERED HYDRAULIC HOSE, METHODS OF MAKING, AND APPLICATIONS THEREOF IN ROBOT SYSTEMS
A robot has a body, a hydraulic control system physically coupled to the body, and a hydraulically-actuated component physically coupled to the body. The hydraulically-actuated component is hydraulically coupled to the hydraulic control system by a hydraulic hose. The hydraulic hose has a length, at least a portion of which extends from a first end to a second end, and a diameter, wherein the diameter of the hydraulic hose at both the first end and the second end is a first diameter, and wherein the at least a portion of the length includes a tapered section in which the diameter of the hydraulic hose decreases, continuously and monotonically, to a second diameter, the second diameter being less than the first diameter. The body includes a restricted region through which the hydraulic hose passes in traversing a path between the hydraulic control system and the hydraulically-actuated component.
1 . A method of adding at least one tapered section to a hydraulic hose, the method comprising:
affixing a first end of at least a portion of the hydraulic hose to a first suspension point;
hanging a first weight from a second end of the at least a portion of the hydraulic hose;
applying heat to a first region of the at least a portion of the hydraulic hose;
monitoring a displacement of the first weight; and
removing heat from the first region of the at least a portion of the hydraulic hose when the displacement of the first weight meets or exceeds a predetermined threshold.
2 . The method of claim 1 , wherein the applying heat to a first region of the at least a portion of the hydraulic hose includes applying heat by an external heat source to the first region of the at least a portion of the hydraulic hose.
3 . The method of claim 2 , wherein the applying heat by an external source to the first region of the at least a portion of the hydraulic hose includes applying heat by an electric heater.
4 . The method of claim 1 , further comprising:
hanging a second weight from the second end of the at least a portion of the hydraulic hose;
applying heat to a second region of the at least a portion of the hydraulic hose;
monitoring a displacement of the second weight; and
removing heat from the second region of the at least a portion of the hydraulic hose when the displacement of the second weight meets or exceeds a predetermined threshold.
5 . The method of claim 1 , wherein the removing heat from the first region of the at least a portion of the first hydraulic hose when the displacement of the first weight meets or exceeds a predetermined threshold causes the at least one tapered section to include a predetermined taper.
6 . The method of claim 1 , wherein the affixing a first end of at least a portion of the hydraulic hose to a first suspension point includes affixing a first end of at least a portion of a thermoplastic hose.
7 . A method of adding at least one respective tapered section to each of a first and a second hydraulic hose, the method comprising:
affixing a first end of at least a portion of the first hydraulic hose to a first suspension point;
hanging a first weight from a second end of the at least a portion of the first hydraulic hose;
applying heat to a first region of the at least a portion of the first hydraulic hose;
monitoring a displacement of the first weight; and
removing heat from the first region of the at least a portion of the first hydraulic hose when the displacement of the first weight meets or exceeds a predetermined threshold.
8 . The method of claim 7 , wherein the adding at least one tapered section to the second hydraulic hose includes:
affixing a third end of at least a portion of the second hydraulic hose to a second suspension point;
hanging a second weight from a fourth end of the at least a portion of the second hydraulic hose;
applying heat to a first region of the at least a portion of the second hydraulic hose;
monitoring a displacement of the second weight; and
removing heat from the first region of the at least a portion of the second hydraulic hose when the displacement of the second weight meets or exceeds a predetermined threshold.
9 . The method of claim 8 , wherein the hanging a first weight from a second end of the at least a portion of the first hydraulic hose and the hanging a second weight from a fourth end of the at least a portion of the second hydraulic hose includes hanging a common weight from the second end of the at least a portion of the first hydraulic hose and the fourth end of the at least a portion of the second hydraulic hose.
10 . The method of claim 8 , wherein the applying heat to a first region of the at least a portion of the first and the second hydraulic hose includes applying heat from a common external heating source.
11 . The method of claim 7 , further comprising applying heat to a second region of the at least a portion of the first and the second hydraulic hose.
12 . The method of claim 7 , wherein the removing heat from the first region of the at least a portion of the first hydraulic hose when the displacement of the first weight meets or exceeds a predetermined threshold causes the at least one tapered section to include a predetermined taper.
13 . The method of claim 7 , wherein the affixing a first end of at least a portion of the first hydraulic hose to a first suspension point includes affixing a first end of at least a portion of a thermoplastic hose.