The spiral swing oil cylinder realizes the shaft output rotation through the internal spiral of the casing and the external spiral of the spline sleeve, the internal spiral of the spline sleeve and the external spiral of the output shaft. The rotary seal divides the cylinder body into two cavities. There are two oil ports on the cylinder body, and each oil port corresponds to one cavity. In applications with limited installation space, the spiral swing cylinder can be implemented in the following two ways: I. Fixing of the cylinder shell: the four feet and the structural parts are fixed by bolts. Assuming that the oil inlet of one port will push the spline sleeve to rotate toward the other port, thereby driving the shaft to rotate. The rotation of the output flange is realized. Second, the output flange of the oil cylinder is fixed: that is, when the output flange is fixed to the structural member by a circle of bolts, the principle is the same, and the rotation of the housing can be achieved to drive the structural member connected to the four feet to swing. The spiral helix oil cylinder has a large helical rise angle. The compact structure achieves high torque output, high load capacity, impact resistance, zero leakage, and flexible installation. It is suitable for structural applications with limited installation space to realize swinging of the actuator.
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