Abstract: A magnetostriction-based vibration suppression apparatus for a steel pipe of a power transmission tower includes a lantern ring, four spoiler cups, and two control boxes; the lantern ring is fixedly sleeved on the steel pipe; mouths of the spoiler cups face outwards, and bottoms thereof are hinged on the lantern ring; the four spoiler cups are squarely distributed; and the two control boxes are symmetrically and fixedly mounted on the lantern ring; the control boxes are arranged as follows: the spoiler cups are arranged in pairs as a group, and each control box is arranged between two spoiler cups; each control box is provided therein with two groups of inerter units corresponding one-to-one to the spoiler cups. The vortex is avoided using a structure such as a spoiler cup, and the vibration kinetic energy of the steel pipe is consumed, thereby achieving an effective vibration reduction effect.

Abstract: The present application relates to a synchronously driven brake, belonging to the field of vehicle brake devices. The synchronously driven brake includes a balancing frame configured to be connected with a brake cable and driven by the brake cable, wherein a pull cable is connected to the balancing frame and connected with two cable locking members, and configured to apply a same force to the two cable locking members; braking portions driven by the cable locking member to move and press against a wheel rim to decelerate the wheel rim are respectively connected to the cable locking members; and the synchronously driven brake further includes restoring portions applying to the braking portions a force enabling the braking portions to move away from the wheel rim.

Abstract: A shock absorber includes: a first passage through which a working fluid flows from a chamber inside a cylinder; a second passage which communicates with the chamber; a damping force generation mechanism which is provided in the first passage, a communication hole which is provided with at least a part of a passage of the second passage and is formed in a piston rod communicating with at least the chamber; a housing which has a passage of least a part of the second passage; a free piston which is movably provided inside the housing and defines the second passage into an upstream side and a downstream side of a flow of the working fluid when the piston moves in one direction, and an elastic body which is provided between the free piston and the housing. The free piston is formed of a resin material.

Abstract: A drum brake apparatus includes: a housing; a main braking part installed on one side of the housing, and driven by hydraulic pressure so as to press a shoe during main braking; and a parking braking part installed on another side of the housing, and driven by an electromotive force of an actuator so as to press the shoe during parking braking. The housing includes: a housing part; a piston housing part formed on the housing part, having a hollow portion formed therein, and having the main braking part installed therein; and a rod housing part formed on the housing part, having a hollow portion formed therein, and having the parking braking part installed therein. The rod housing part is disposed at a location farther from a rotation center of the shoe than the piston housing part.

Abstract: A braking system for slideway guided amusement vehicles providing both manual and automatic braking for the slideway guided amusement vehicles is provided. The braking system includes at least one brake handle, a first shaft fixed to the at least one brake handle, a first gear concentrically positioned on and free to spin independently of the first shaft, an actuator fixed to the first shaft for providing a linear motion to a stop pin, an inlet opening on the first gear for receiving the stop pin, a second gear coupled to the first gear, concentrically fixed on a second shaft for mounting spinnably and extending horizontally to a chassis of a vehicle, at least one friction member attached to the second shaft, a tensioning means, and a control unit adapted to remove the stop pin from the inlet opening via the actuator.

Abstract: A hydraulic vibration damper may include inner and outer tubes filled with damping liquid, a piston rod projecting axially out of the inner tube and movable in rebound and compression directions, a sealing and guide pack that sealingly closes an end of the outer tube and guides piston rod movement, a working piston for producing damping forces that is fastened to the piston rod and is guided on an inner lateral surface of the inner tube and subdivides the interior of the inner tube into a piston rod-side and piston rod-remote working spaces. The vibration damper has rebound and compression stops. In the piston rod-remote working space, a compression stop, starting from a predetermined retraction travel of the piston rod, may produce a travel- and speed-dependent compression stop force.

Abstract: There is provided a damper device including: a cylinder; a piston; and a seal ring. The piston includes: a column portion wound around the seal ring; and a first restricting portion and a second restricting portion that are configured to restrict movement of the seal ring in a axial direction. The column portion has a protruding portion protruding outward in a radial direction. The first restricting portion has a cutout portion. The seal ring is capable of taking a deformed state where the seal ring is deformed so as to partially enter the cutout portion by movement of the piston. In a case where the seal ring is in the deformed state, and in a normal state where the seal ring does not enter the cutout portion, the seal ring is pressed against an inner peripheral surface of the cylinder by the protruding portion.

Abstract: A piston cylinder device (1) comprising a cylinder (2) with a first and a second end and a guide (6), such that a pressure chamber (8) is formed in the cylinder. A piston (12) is moveable in the pressure chamber (8). The guide (6) is fixedly secured to the cylinder (2) by a lock ring (7). A sealing means (9) is arranged to seal between the guide (6) and an inner wall of a tubular wall (3) of the cylinder (2) to prevent fluid leakage from the pressure chamber (8) to the surroundings. The piston cylinder device (1) is provided with a material weakening zone (13) arranged in the inner wall of the tubular wall (3) of the cylinder (2) axially between the lock ring (7) and the second end (20) of the cylinder (2), the material weakening zone (13) being arranged to be deformed or sheared against the lock ring (7) at a predetermined level of impact of the piston (12) against the guide (6).

Abstract: A hydraulic damper assembly comprises a housing extending between a first end and a second end. A main piston is slidably disposed in the fluid chamber dividing the fluid chamber into a first chamber and a second chamber. A piston rod extends along a center axis and attaches to the main piston. An additional piston is coupled to the piston rod and axially spaced from the main piston. The additional piston includes a main body defining a compression channel and a rebound channel that allow fluid to flow through the additional piston. A securing member secures the additional piston to the piston rod and defines an outer groove. A piston ring is located in the outer groove between the additional piston and the securing member. The piston ring is radially spaced from the securing member to allow the piston ring to be in engagement with the housing.

Abstract: The present invention of damping segmental ring structure for subway tunnels built in grim environments of deformable ground can mitigate the stress-concentration of the tunnel lining structures. The deformable ground can be caused by differential settlement or high-intensity earthquakes. Embodiments of the invention have self-adjustment features and forms for deformation and rotation, which comprise one adapter in the middle, two transitional grooved segmental structures, and an internal steel tube. All three forms comprised 3 or 4 pieces with the same features so they can be easily installed, transported and erected on sites and bolts are used to bolt them together to form an integrity structure with damping characteristics. The damper placed in the middle comprises two loading plates that form the shell of the damper, the internal core of the damper which includes interbedded installed rubber pads and steel plates within the loading plates and spring systems that compress the internal core.

Abstract: A brake pad retraction spring that includes a coil, first and second biasing arms, and first and second biasing tips. The first and second biasing arms may extend from the center coil. The first and second biasing tips may extend from ends of the first and second biasing arms, respectively.

Abstract: A method for manufacturing a hollow spring member having a hollow steel spring rod having terminal sealed portions at both ends thereof. Each terminal sealed portion has a rotationally symmetric shape in which an axis passing through a center of the spring rod is an axis of symmetry. Each terminal sealed portion has an end wall portion including an end face; an arc-shaped smoothly curved surface between an outer peripheral surface of the spring rod and the end face, and a hermetically closed distal-end-center closure portion on the axis passing through the center of the spring rod. The method includes forming each of the end portions of the spring rod by forming a chamfered portion on an inner or outer peripheral side of the end portion of a hollow wire, the end portion having an opening portion at a distal end, heating the end portion of the hollow wire having the chamfered portion, and spinning the heated end portion to be gathered toward the axis from the outer peripheral side by a jig.

Abstract: Disclosed is a damper structure in contact with a connection unit for coupling a first coupling structure part and a second coupling structure part, including a damper part formed of an elastic material and at least one fixing part coupled to at least one surface of the damper part and protruding outward, and coming into contact with the connection unit and moving toward the damper part by pressure applied by the connection unit when the connection unit is separated or fastened.

Abstract: A frictional damper is designed with a tubular housing having a longitudinal axis, with a tappet, which is displaceable in the housing along the longitudinal axis and is led out at an open end of the housing, with a frictional element lying against the tappet and with a cap attached to the open end of the housing with axial prestressing relative to the longitudinal axis.

Abstract: A vibration damping device which is able to damp vibration of a rotating body in a high-speed range and to certainly accelerate the rotating body to the high-speed range is provided. A vibration damping device 1 damping vibration of a rotating body 100 includes an automatic balancer 2 which is configured to cancel out imbalance of the rotating body 100 when the rotating body rotates 100; a liquid damper 4 which is coaxially rotatable with the rotating body 100 and includes a collision member 23 provided in a casing 20 in which liquid 22 is sealed, the liquid colliding with the collision member 23 when the liquid 22 moves in a circumferential direction; and a relative rotation unit 5 which is configured to cause the liquid damper 4 to rotate relative to the rotating body 100.

Abstract: A resilient unit suitable for providing comfort, convenience, support or protection is described. The unit typically takes the form of a pad comprising a plurality of pocketed coil springs arranged in an array, each spring being substantially encased in an individual pocket, and the unit being compressible in the axial direction of the springs, wherein each spring comprises a number of coils, and in respect of at least some springs the coils at opposed ends are of different diameter.

Abstract: A drive assembly for a vehicle drive train includes a base assembly including a base hub configured for non-rotatably connecting to an outer circumferential surface of a transmission input shaft. The base assembly includes a torsional damper fixed to the base hub. The torsional damper includes an input section and an output section drivingly connected by springs. The springs allow relative rotation between the input section and the output section. The output section of the torsional damper is non-rotatably fixed to the base hub. The drive assembly also includes a raw hub extension configured for non-rotatably connecting to an engine crankshaft. The raw hub extension is non-rotatably fixed to the input part of the torsional damper at an engine side of the torsional damper. The torsional damper allows relative rotation between the raw hub extension and the base hub.

Abstract: A manufacturing method for a cylinder device which includes a cylinder, a piston, a piston rod, a seal member, and an installing member, the method includes: a welding step for fixing the installing member to the cylinder through electrical resistance welding; a demagnetizing step for demagnetizing at least an opening portion of the cylinder; and an assembling step for assembling the piston, the piston rod, and the seal member in the cylinder through the opening portion.

Abstract: A vibration isolator includes a first conical disc spring member having a first end and a second end. A first-end spacer in contact with the first spring member first end, and a second-end spacer in contact with the first spring member second end. A second conical disc spring member has a first end and a second end. The second spring member first end is in contact with the first-end spacer. Another second-end spacer is in contact with the second spring member second end. A flexible housing of the isolator defines an interior. The housing is in contact with and extends between the second-end spacer and the other second-end spacer so that the first-end spacer and the first and second spring members are received in the housing interior. The housing includes a plurality of spaced-apart through holes formed therealong between the second-end spacer and the other second-end spacer.

Abstract: The present disclosure relates to a brake device for a vehicle, and a main object of the present disclosure is to provide a brake device for a vehicle which can stably perform an electric parking braking cooperative control process for dynamic parking braking in a state in which the brake device enters a backup mode due to an abnormality or a malfunction generated in a device related to an electric booster in a vehicle equipped the electric booster. In order to achieve the above object, a brake device including a fallback valve which is provided on a hydraulic pressure supply line connected to a wheel brake of a wheel on which an electronic parking brake is installed, and which is configured to selectively shut off brake liquid pressure supplied to the wheel brake, and a method for controlling the same are disclosed.