Coil spring modeling apparatus and method utilizing a torsion detection to control an actuator unit
First Claim
1. A coil spring modeling apparatus provided on a strut comprising a lower spring seat and an upper spring seat, the coil spring modeling apparatus comprising:
- a first attachment member disposed on the lower spring seat;
a second attachment member disposed on the upper spring seat;
an actuator unit which is arranged between the first attachment member and the second attachment member, and which is extendible and retractable;
a torsion detection mechanism comprising a displacement gauge configured to detect a relative displacement including a torsional angle formed between the first attachment member and the second attachment member; and
a controller configured to control the actuator unit and to correct a force line position based on an amount of the displacement when the displacement is detected by the displacement gauge of the torsion detection mechanism.
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Accused Products
Abstract
A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a hydraulic pressure supply device, a torsion detection mechanism, and a controller. The torsion detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. The displacement gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. The controller calculates a relative torsional angle between the first attachment member and the second attachment member based on the detected displacement.
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Citations
8 Claims
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1. A coil spring modeling apparatus provided on a strut comprising a lower spring seat and an upper spring seat, the coil spring modeling apparatus comprising:
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a first attachment member disposed on the lower spring seat; a second attachment member disposed on the upper spring seat; an actuator unit which is arranged between the first attachment member and the second attachment member, and which is extendible and retractable; a torsion detection mechanism comprising a displacement gauge configured to detect a relative displacement including a torsional angle formed between the first attachment member and the second attachment member; and a controller configured to control the actuator unit and to correct a force line position based on an amount of the displacement when the displacement is detected by the displacement gauge of the torsion detection mechanism. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of controlling a coil spring modeling apparatus, which comprises:
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an actuator unit including hydraulic cylinders arranged between a first attachment member disposed on a lower spring seat and a second attachment member disposed on an upper spring seat; and a hydraulic pressure supply device which supplies fluid pressure to the hydraulic cylinders, the method comprising; applying a torque about a kingpin axis to the first attachment member relative to the second attachment member; detecting a torsional angle formed between the first attachment member and the second attachment member; and correcting a force line position or controlling the hydraulic cylinders based on the detected torsional angle.
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8. A coil spring modeling apparatus provided on a strut comprising a lower spring seat and an upper spring seat, the coil spring modeling apparatus comprising:
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a first attachment member disposed on the lower spring seat; a second attachment member disposed on the upper spring seat; an actuator unit which is arranged between the first attachment member and the second attachment member, and which is extendible and retractable; a controller configured to control the actuator unit; and a torsion detection mechanism configured to detect a torsional angle formed between the first attachment member and the second attachment member; wherein the controller controls the actuator unit such that the torsional angle becomes zero when the torsional angle is detected by the torsion detection mechanism.
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Specification