478results about How to "Large rotation angle" patented technology

A system for providing attitude and antenna steering for a spacecraft is disclosed. The spacecraft has a number of reaction wheels and a number of antennas. The system includes control logic configured to: determine a beta angle, the beta angle being the angle between a sun vector and an orbit plane of the spacecraft, and alternately engage either a first mode or a second mode to provide attitude and antenna steering based on the beta angle.

An adjustable stand for carrying an electronic device and adjusting a position on a desk is provided to include a clamp and a supporting element. The clamp has a positioning element that comprises two axial portions each having a through hole, a clamping element that comprises an adjusting portion with a plurality of notches, and an elastic element positioned between the positioning element and the clamping element for restoring the position. The supporting element has two terminal rods that are axially fixed to the axial portions of the positioning element, and a supporting rod formed between the two terminal rods for lodging into one of the notches of the clamping element.

The invention discloses a multifunctional micropile drilling machine, comprising a base plate, a platform which is fixed on the base plate, a covering element and an amplitude variation mechanism which are arranged on the platform, and a drilling and lifting device which is connected with the amplitude variation mechanism, wherein a hydraulic system and a main control system are arranged in the covering element; the amplitude variation mechanism comprises a turning pair A and a turning pair B; the turning pair A drives the amplitude variation mechanism and the drilling and lifting device to rotate relatively to the platform by + / - 90 degrees; and the turning pair B drives the drilling and lifting device to rotate relatively to the amplitude variation mechanism by 360 degrees. The turning pair A of the multifunctional micropile drilling machine does not turn along with the platform and just drives the amplitude variation mechanism and the drilling and lifting device to turn, so that the turning moment is reduced and turning becomes quite steady; the turning pairs employed also are lower than the turning pair employed to drive the whole platform in power so that the cost is saved; the turning pair B is capable of rotating by 360 degrees; and in contrast with the similar drilling machine employing an oil cylinder for rotation, the multifunctional micropile drilling machine has the advantages that the rotation angle is large and positioning of drilling is also quite accurate.

A rotary mechanism includes a base, a supporting component, a bridging component, a guiding component and a shaft. The base includes a guiding structure. The guiding structure includes a first area, a curvature of the first area is increased from a front end to a rear end of the first area. The bridging component includes a pivot hole and a guiding slot. The guiding component passes through the base and is movably disposed inside the guiding structure. Two ends of the guiding component are respectively disposed on the supporting component and the pivot hole, and the supporting component can rotate relative to the bridging component via the guiding component. The shaft passes through the base and is movably disposed inside the guiding slot. The guiding component moves along the guiding structure, and the supporting component can rotate relative to the base via the bridging component and the shaft.

The invention relates to a six-degree of freedom parallel mechanism based on different radii. The six-degree of freedom parallel mechanism comprises a static platform, a movable platform, six support frames, six upper spherical hinges, six lower spherical hinges, six direct-current motors, six branched chains and an operating rod, wherein the six support frames are fixedly connected with the static platform at the preset position; the six direct-current motors penetrate through holes in the support frames respectively and are connected with lower connecting rods of the six branched chains; upper connecting rods of the six branched chains are connected with the movable platform by the six upper spherical hinges; the upper and lower connecting rods of the six branched chains are connected with each other by the six lower spherical hinges; and the operating rod is connected with a through hole of the movable platform. According to the six-degree of freedom parallel mechanism, each branched chain can determine the spatial position of each spherical hinge on the movable platform, so that six degrees of freedom of motion of the platform can be realized by the six spherical hinges which are non-collinear; and three-dimensional force and three-dimensional moment are outputted on the movable platform, so that an interactive feeling that the three-dimensional force and the three-dimensional moment are the same as virtual force and virtual moment in virtual environment is provided for people. The six-degree of freedom parallel mechanism is force sense interactive equipment which is novel in configuration, simple in structure and high in performance.

The package of the present invention is a package comprising a metal container having a mouth and a metal container cap with a liner mounted on the mouth, the liner (17) of the container cap has an outer shell descending downward from the peripheral end. The ring (20) and the inner ring (21) descending downward inside the outer ring (20), the inner surface of the outer ring (20) is a surface extending straight in the vertical direction, and in the state of being inserted into the opening end of the mouth of the container, While pressing the container cap from above, the corners transitioning from the top wall to the side edges are extruded so that the inner surface of the outer ring is in close contact with the outer surface of the side wall portion formed on the open end of the container mouth , and an inward protruding part is formed on the lower end of the inner surface of the outer ring, and the inner protruding part is close to the outer part of the lower curling part of the mouth of the container. While effectively preventing seal damage before the connecting pieces connected to the anti-theft ring are broken, this package also has excellent reclosing performance.

An adequate rotation angle is ensured and any member is not damaged due to fluid resistance even with use of highly viscous fluid. A rotating shaft (2) is provided inside a casing (1) having first divider walls (5) provided on its inner periphery and in direct or indirect contact with the rotating shaft. Second divider walls (4) are provided on an outer periphery of the rotating shaft and in either direct or indirect contact with the casing. A flow passage (4a) is provided in the second divider wall for fluid communication between the pressure chambers. A check valve mechanism has curving portions (6a) moving on and along the periphery of the rotating shaft and valving portions (6b) each joining to the curving portion. The curving portion is supported between the rotating shaft and the first divider wall. The flow passage is opened / closed depending upon a direction of fluid flow.

An actuator 100 of the type employing a two-degree-of-freedom vibration system includes: a pair of first mass portions 1, 11; a second mass portion 2 provided between the pair of first mass portions 1, 11; a pair of supporting portions 3, 3 for supporting the pair of first mass portions 1, 11 and the second mass portion 2; at least a pair of first elastic connecting portions 4, 4 which respectively connect the first mass portions 1, 11 to the supporting portions 3, 3 so that each of the first mass portions 1, 11 can rotate with respect to the supporting portions 3, 3; and at least a pair of second elastic connecting portions 5, 5 which respectively connect the second mass portion 2 to the first mass portions 1, 11 so that the second mass portion 2 can rotate with respect to the first mass portions 1, 11. Each of the first mass portions 1, 11 is driven by the application of an alternating voltage, causing the second mass portion 2 to rotate.

A rotary mechanism includes a base, a supporting component, a bridging component, a guiding component and a shaft. The base includes a guiding structure. The guiding structure includes a first area, a curvature of the first area is increased from a front end to a rear end of the first area. The bridging component includes a pivot hole and a guiding slot. The guiding component passes through the base and is movably disposed inside the guiding structure. Two ends of the guiding component are respectively disposed on the supporting component and the pivot hole, and the supporting component can rotate relative to the bridging component via the guiding component. The shaft passes through the base and is movably disposed inside the guiding slot. The guiding component moves along the guiding structure, and the supporting component can rotate relative to the base via the bridging component and the shaft.

A door edge protection device for a motor vehicle door which comprises a door edge protection member guided movably with respect to the door at at least two points lying one behind the other in a longitudinal direction of the door. The door edge protection member is driven via an eccentric lever mounted rotatably in the door.

The outlet switch device includes a fixed unit, an outlet switch mechanism, an inlet switch mechanism and a driving mechanism. The outlet function switch is realized through the relative rotation between the outlet switch mechanism and the fixed unit; the fixed unit includes a control cavity and an inlet waterway connected to the external water resource; the outlet switch mechanism includes a switch plate, which is movable connected inside the control cavity and divides the control cavity into an upper cavity and a lower cavity; the inlet switch mechanism controls the inlet waterway to control the water turning into the upper cavity or the lower cavity, making the switch plate move up and down with the effect of the water; the driving mechanism is disposed between the switch plate and the fixed unit to transform the action up and down to rotation.

The invention relates to an active headrest device for an automobile seat. The active headrest device for the automobile seat comprises a backrest framework (1), a triggering plate (2) arranged on the backrest framework (1), and a bracket structure fixedly connected with the triggering plate (2) for supporting a headrest. The backrest framework (1) is fixedly provided with a guide plate (4) with a through groove (3). The triggering plate (2) is in sliding connection on the guide plate (4) through a sliding part in slide match with the through groove (3). An elastic device for providing an elastic restoring force to the triggering plate (2) is arranged between the guide plate (4) and the sliding part. The direction of the elastic restoring force provided by the elastic device to the triggering plate (2) and the sliding direction of the sliding part are on a same straight line. With the adoption of the technical scheme provided by the invention, the direction of the elastic restoring force provided by the elastic device to the triggering plate and the sliding direction of the sliding part are on a same straight line so that the triggering plate triggered can restore rapidly.

A device for elastic guidance in rotation for a timepiece mechanism allowing rotation of one element relative to another element about an axis of rotation Z defining an axial direction, including construction blades, each construction blade includes an assembly fixing part including a body and a functional part extending from the body as far as one end, the assembly fixing part and the functional part being separated by at least one slot in at least two extensions which are elastically connected and extend in a radial direction transverse to the axial direction, and anchorage zones which are disposed at opposite axial ends of the flexible guidance device, and configured to be fixed to the elements.