A multiple-antenna positioning system with a single drive element, providing reduced weight and complexity over systems that have a drive element for each antenna. In certain examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with a pair of link arms. By driving a single drive spindle, each of the antenna spindles in the system can be rotated by the associated pair of link arms. The link arms can have an adjustable length, such as through a turnbuckle mechanism, to reduce backlash in the system, and in some examples can apply a preload to the system. By reducing backlash, the multiple antenna positioning system can have improved responsiveness to a rotation of the single drive element, as well as improved stability of the positioning of each antenna when the drive element is held in a fixed position.

A gearless drive comprising a reference crankshaft, a high-speed crankshaft, one or more linkages, and a low-speed member with linear slides is disclosed. The present invention provides a 2:1 reduction ratio without any gears, belts, chains, friction couplings, or other engaging members. Certain embodiments are balanced and may operate at high speed with little vibration. Pre-loaded rolling or self-lubricated joints may be used to eliminate backlash and the need for a lubrication system altogether. It is co-axial, does not slip, and may be produced using inexpensive materials, components, and manufacturing processes in both large and small form factors, due to the absence of any high-precision components. These advantages are well suited to applications which require high input speeds, low ratios, high efficiency, low complexity, high reliability and low cost.

In order to solve low strength and labor-saving of transmission mechanism of conventional crank assembly for a bicycle, this invention provides a crank device. The crank device of this invention includes: a housing (3) to be connected to a frame of the bicycle; a transmission member (4) accommodated in the housing (3) in a loose-fit manner; a supporting shaft (5) partially accommodated in the transmission member (4) in a loose-fit manner; and two driving assemblies (8, 9). Each of the driving assemblies (8, 9) includes: a driving member (82, 92) secured to transmission member (4) and to be connected to a sprocket of the bicycle, wherein one end of the supporting shaft (5) passes through the transmission member (4) and the driving member (82, 92) in a loose-fit manner; and a force arm (81, 91) including an ear (811) secured to the driving member (82, 92) and a bump (812) pivoted to the one end of the supporting shaft (5). This invention allows the crank device to transmit a large force and enhance labor-saving effect.

In order to solve low strength and labor-saving of transmission mechanism of conventional crank assembly for a bicycle, this invention provides a crank device. The crank device of this invention includes: a housing (3) to be connected to a frame of the bicycle; a transmission member (4) accommodated in the housing (3) in a loose-fit manner; a supporting shaft (5) partially accommodated in the transmission member (4) in a loose-fit manner; and two driving assemblies (8, 9). Each of the driving assemblies (8, 9) includes: a driving member (82, 92) secured to transmission member (4) and to be connected to a sprocket of the bicycle, wherein one end of the supporting shaft (5) passes through the transmission member (4) and the driving member (82, 92) in a loose-fit manner; and a force arm (81, 91) including an ear (811) secured to the driving member (82, 92) and a bump (812) pivoted to the one end of the supporting shaft (5). This invention allows the crank device to transmit a large force and enhance labor-saving effect.

A device for power transmission includes a drive plate, a support plate, an output plate, a first main slide rail, a first drive train element, a first counterforce element, a first power transmission element, and a first output element, wherein the drive plate, support plate, and output plate are disposed above one another. The counterforce element generates a counterforce such that the total force from the driving force and the counterforce acting on the first main slide rail leads to a rotational movement of the support plate. The first power transmission element causes a rotational power transmission during rotational movement of the support plate and the first output element is connected to the output plate such that during the rotational movement of the support plate, an output power transmission connection exists from the moving part of the first main slide rail to the first output element.

A device for power transmission includes a drive plate, a support plate, an output plate, a first main slide rail, a first drive train element, a first counterforce element, a first power transmission element, and a first output element, wherein the drive plate, support plate, and output plate are disposed above one another. The counterforce element generates a counterforce such that the total force from the driving force and the counterforce acting on the first main slide rail leads to a rotational movement of the support plate. The first power transmission element causes a rotational power transmission during rotational movement of the support plate and the first output element is connected to the output plate such that during the rotational movement of the support plate, an output power transmission connection exists from the moving part of the first main slide rail to the first output element.

A drive system as disclosed includes an input shaft, an output shaft, and at least two coupling elements respectively coupled to the input shaft and the output shaft. In order to absorb assembly and manufacturing tolerances with respect to the shafts, the coupling elements and their attachment to the shafts and thereby prevent jamming of the drive system, at least one coupling element has an elastically deformable section, the elastically deformable section having a different material or a different cross-section than an adjacent section of the coupling element.

A device comprising a main support an equipment support having a first position and a second position adjustable relative to the height of the main support. A first crank lever is mounted to the first bearing and rotatable about a first rotational axis via a first shaft. A connecting rod is connected to the first crank lever via a first joint and to the equipment support via a second joint. A guide is arranged such that the equipment support is displaceable while guided to remain parallel to the main support. The equipment support passes an upper dead center position when moving from a first to a second position by rotation of the first crank lever and, upon further rotation a stop element contacts a stop.

A device comprising a main support an equipment support having a first position and a second position adjustable relative to the height of the main support. A first crank lever is mounted to the first bearing and rotatable about a first rotational axis via a first shaft. A connecting rod is connected to the first crank lever via a first joint and to the equipment support via a second joint. A guide is arranged such that the equipment support is displaceable while guided to remain parallel to the main support. The equipment support passes an upper dead center position when moving from a first to a second position by rotation of the first crank lever and, upon further rotation a stop element contacts a stop.

An eccentric adjusting unit is disclosed, for example, for adjusting a connection point for a control arm of a wheel suspension. The unit may include an electric motor and an eccentric gear section. The eccentric gear section may have an input shaft and an output shaft, wherein the input shaft is configured to be driven by the electric motor and the output shaft rotates eccentrically with respect to an output axis of rotation and can be in operative connection with the connection point or forms this connection point. The eccentric gear section may have a star wheel gear stage.