Abstract:
The invention relates to a driving device which is composed of a rotary drive assembly and a spindle drive assembly which are both removed from a modular system which comprises at least two rotary drive assemblies and at least two spindle drive assemblies which are formed with coupling elements which are compatible with one another. The invention also relates to a driving device, of which the rotary drive is received in a housing tube which is closed at its end remote from the spindle drive by a base piece, wherein the base piece and the housing tube are manufactured from plastics material and are connected to one another by cohesive bonding. Finally, the invention also relates to a modular system from which the rotary drive assembly and a spindle drive assembly are removed.
Abstract:
A piston/cylinder unit has a closed cylinder with a piston axially displaceably guided therein. The piston divides the cylinder interior into first and a second working spaces which are both filled with a fluid. A piston rod extends through the cylinder interior and is guided on its end side to the outside in a sealed manner through a closing wall of the cylinder. Furthermore, a first nonreturn valve is arranged in the piston having a closing element of which is force-loaded in the closing direction. At least a portion of the first nonreturn valve is exposed to pressure in the first working space. When an opening pressure in the first working space exceeds an opening pressure, the first nonreturn valve is opened connecting the first working space to the second working space. A second nonreturn valve is also arranged in the piston and also has a closing element of which is force-loaded in the closing direction. The second nonreturn valve is opened when pressure in the second working space exceeds an opening pressure for connecting the second working space to the first working space. The surface of the closing element of the first and/or second nonreturn valve acted upon by the pressure of the respective working spaces can be enlarged during the opening stroke of said nonreturn valve.
Abstract:
The invention relates to an adjusting element having a cylinder 1, the interior space 8 of which contains a pressurized medium. A piston is arranged displaceably in the cylinder 1, said piston having a piston rod 4 which protrudes out of the cylinder 1 at one end of the cylinder 1. The piston rod 4 is surrounded by an annular seal 5 which, with its inner, radially encircling circumference, bears in a sealing manner against the piston rod 4 and, with its outer, radially encircling circumference, bears in a sealing manner against the inner wall of the cylinder 1, is acted upon, on the side facing the interior space 8, by the pressure of the medium and, with its side facing away from the interior space 8, is supported on a supporting element 10. The supporting element, in turn, with its end facing away from the annular seal 5, is supported on part of the cylinder 1, it being possible for the supporting element 10, when a defined bearing force of the annular seal 5 against the supporting element 10 is exceeded, to be deformed somewhat telescopically, reducing its axial length in the cylinder 1, from a normal position into an overload position, as a result of which a passage opening 19 from the interior space 8 of the cylinder 1 to the surroundings can be produced. The supporting element 10 has a first part 11 which is arranged in the cylinder 1 and a second part 13 which is connected to the first part, can be moved from the normal position toward the first part 11 into the overload position and against which the annular seal 5 bears, it being possible for one end of a stop to be supported on the first part 11, said stop, in the normal position, protruding through the second part 13 axially in order to extend the cylinder 1 at least until close to the annular seal 5.
Abstract:
An actuating system includes a driving device fixed to a base part and operatively connected to a movable part. A sensor detects the rotational speed of the movable part at a reference measuring location, and a control system forms a differential of the rotational speed with respect to the time. The formed differential is compared in a comparison unit with a stored differential value which corresponds to a measuring point on a route of movement of the movable part. An obstacle is recognized when there is a difference above a threshold value between the formed differential and the associated stored value.
Abstract:
A damping system is provided including at least one fluid damper including a damping volume containing a damping fluid, and a fluid reservoir including a reservoir piston partitioning an inner volume of the fluid reservoir into a damping chamber containing the damping fluid and a recoil chamber containing a recoil fluid. The damping volume of the at least one fluid damper is connected to the damping chamber of the fluid reservoir in a fluid-conducting manner. The reservoir piston is movable in a compression direction increasing a volume of the damping chamber and decreasing a volume of the recoil chamber. The reservoir piston is movable in a dilatation direction decreasing the volume of the damping chamber and increasing the volume of the recoil chamber. The reservoir piston includes a damping chamber surface facing the damping chamber and a recoil chamber surface facing the recoil chamber.
Abstract:
A damping apparatus can be self-centering and include one or more pre-compressed and preloaded mechanical springs. A solar tracking apparatus can include a solar panel mounted on a rotating shaft, and a self-centering damping apparatus operatively connected to the rotating shaft to compensate for torque created when the solar panel is rotated at an angle to horizontal. A steering assembly for a zero-turn riding lawn mower can include a pair of steering levers and a self-centering damping apparatus operatively connected to the steering levers.
Abstract:
The invention relates to a linear drive (100) for moving a closure element of a motor vehicle relative to a body of the motor vehicle. The linear drive (100) comprises an outer tube (110), an inner element (120) arranged in the outer tube (110), wherein the inner element (120) is telescopically extendable along a drive axis (A) of the linear drive (100) from an outlet end of the outer tube (110), and wherein an inner connecting element (128) for connecting the linear drive (100) to the closure element or to the body is fixed to the end of the inner element (120) which is extendable from the outer tube (110), a screw spring (130) arranged radially to the drive axis (A) between the inner element (120) and the outer tube (110), an inner support element (122) fixed to the inner element (120) axially to the drive axis (A), and an outer support element (111) fixed to the outer tube (110) axially to the drive axis (A), wherein the screw spring (130) is clamped axially to the drive axis (A) between the inner support element (122) and the outer support element (111). The linear drive (100) comprises a securing element (150) arranged between the screw spring (130) and the inner connecting element (128) and extending around the inner element (120) for securing the screw spring (130) against escaping from the linear drive (100), wherein, radially to the drive axis (A), an outer diameter of the securing element (150) is larger than an inner diameter of the screw spring (130), and an of the securing element (150) is smaller than an outer diameter of the inner connecting element (128), and wherein the inner element (120) is displaceable relative to the securing element (150) along the drive axis (A).
Abstract:
An actuator includes a spindle drive, a first gear which causes a translational displacement of a first connection unit connected to the spindle drive, and a second gear which engages with the first gear and is connected to a second connection unit. The relative rotation of the two gears causes an actuation of the spindle drive and a rotation of the spindle drive about the rotational axis of the second gear.
Abstract:
An electric side door drive assembly for a vehicle having a length-adjustable electric actuator to bring about opening and closing of the side door, and a door movement sensor unit designed to detect stopping and a current position of the side door during opening or closing of the side door. In the event of stopping of the side door detected by the door movement sensor unit, a controller determines, on the basis of side door position data provided by the door movement sensor unit, a necessary current strength which is to be supplied to the electric motor to hold the side door in its current position, and to deliver the necessary current strength to the motor of the actuator for a holding operation.
Abstract:
Actuating device for a vehicle part movable relative to a body of a vehicle, and in particular a vehicle door or a vehicle hatch, including a drive assembly having a drive unit and a drive element driven by the drive unit, and an actuating element which can be displaced relative to the drive assembly along a displacement axis by means of the drive unit, where the actuating element is connected to a carriage assembly which is in threaded engagement with a spindle, where the spindle can be driven rotationally about an axis of rotation by the drive unit, and where in that a central axis of the drive element is oriented at an angle to a plane which is defined by the displacement axis and the axis of rotation of the spindle.