Damper and washing machine having the damper
First Claim
Patent Images
1. A damper comprising:
- a cylinder;
a piston rod disposed to be movable linearly in the cylinder;
a friction unit disposed to be movable in a radial direction inside the cylinder and generating a damping force by rubbing on an inner circumferential surface of the cylinder; and
a damping force control unit mounted at the piston rod and controlling a damping force by moving the friction unit in the radial direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A damper includes a cylinder; a piston rod disposed to be movable linearly in the cylinder; a friction unit disposed to be movable in a radial direction inside the cylinder and generating a damping force by rubbing on an inner circumferential surface of the cylinder; and a damping force control unit mounted at the piston rod and controlling a damping force by moving the friction unit in the radial direction. A desired damping force is generated at a desired point such that a strong damping force can be generated at an interval where excessive vibration is generated and zero or a weak damping force can be generated at a normal interval, to thereby reduce vibration and noise of a washing machine.
21 Citations
20 Claims
-
1. A damper comprising:
-
a cylinder;
a piston rod disposed to be movable linearly in the cylinder;
a friction unit disposed to be movable in a radial direction inside the cylinder and generating a damping force by rubbing on an inner circumferential surface of the cylinder; and
a damping force control unit mounted at the piston rod and controlling a damping force by moving the friction unit in the radial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A washing machine comprising:
-
a cabinet;
a tub installed in the cabinet and storing washing water;
a drum rotatably disposed inside the tub and washing and dewatering the laundry;
a plurality of support springs mounted between an upper portion of the tub and an upper inner wall of the cabinet; and
a plurality of dampers installed between a lower portion of the tub and a lower inner wall of the cabinet, wherein the damper comprises;
a cylinder connected with one of the tub and the cabinet;
a piston rod disposed to be movable linearly in the cylinder and connected with the other of the tub and cabinet;
a friction unit disposed to be movable in a radial direction inside the cylinder and generating a damping force by rubbing on an inner circumferential surface of the cylinder; and
a damping force control unit mounted at the piston rod and controlling a damping force by moving the friction unit in the radial direction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification