122results about How to "Reduced torsional stiffness" patented technology

An elastic space-deployable boom of carbon fiber reinforced plastic or other resilient material having an open substantially triangular cross-section when deployed and stowed with a flattened cross-section about a circular hub.

A lubricant supported electric motor includes a static member and a movable member movably disposed within the static member to define a gap therebetween. The static member may be configured as a stator and the movable member may be configured as a rotor. The movable member may also be configured to move relative to the static member. The static member and movable member are configured to exert an electromagnetic force therebetween and convert electrical energy into mechanical energy and move the movable member. A lubricant is disposed in the gap between the static member and the movable member to support the movable member relative to the static member.

Splitboard boot bindings for backcountry splitboarding. Each of a pair of soft-boot bindings is provided with an integral boot binding lower that conjoins the two halves of a splitboard without the additional weight or height of an adaptor mounting plate, upper binding baseplate or “tray”, and extra fasteners of the prior art. The boot binding lower is formed as a box girder and provides improved torsional stiffness for splitboard riding. When subjected to a torque applied by the rider, the bottom mediolateral edges of the box girders are configured to contactingly engage the top face of the splitboard, thereby dynamically coupling the rider's boot sole and the board via a single rigid structure. In a preferred embodiment, the web or “spacer” members of the box girder are characterized by an aspect ratio or contour height that is varied from heel to toe.

Improved splitboard boot bindings for backcountry splitboarding are disclosed. Each of a pair of soft-boot bindings is provided with an integral boot binding lower that conjoins the two halves of a splitboard without the additional weight or height of an adaptor mounting plate, upper binding baseplate or “tray”, and extra fasteners of the prior art. The boot binding lower is formed as a modified sandwich box girder or modified monolithic box girder and provides improved torsional stiffness for splitboard riding. When subjected to a torque applied by the rider, the bottom mediolateral flanges of the box girders are configured to contactingly engage the top face of the splitboard, thereby dynamically coupling the rider's boot sole and the board via a single rigid structure. In a preferred embodiment, the web or “spacer” members are characterized by an aspect ratio or contour height that is varied from heel to toe.

The invention relates to a jib-type axle box positioning device for a bogie. The jib-type axle box positioning device is characterized by comprising a positioning jib, an axle box body, a framework positioning jib seat, an axle box spring, an axle box rubber pad assembly, a unidirectional axle box oil damper and a framework, wherein one end of the positioning jib is fixed on a bearing seat of the axle box body through bolts, and the other end of the positioning jib is connected with the framework positioning jib seat through elastic nodes, so as to form an articulated jib; the axle box spring is arranged between the top of the axle box body and the framework, and the axle box rubber pad assembly is additionally arranged between the axle box body and the axle box spring; and the end part of the positioning jib and that of the framework are connected through the unidirectional axle box oil damper. The jib-type axle box positioning device can favorably serve an elastic positioning function, has stable properties, avoids abrasiveness, ensures the security and the stationarity of the vehicle running at a high speed, effectively prevents the bogie from snaking movement, and can be extensively applied to various wagons.

The invention discloses a bogie frame which comprises two lateral beams and at least one beam. The beam is connected with the lateral beams through rubber joints so as to buffer vertical force borne by a connecting point when a railway vehicle passes through a curve. Torsional moment generated by the vertical force on the bogie frame is reduced, torsional rigidity of the bogie frame is reduced, rate of wheel load reduction and derailing coefficient are reduced, and train operation safety is improved.

An aircraft comprising a fuselage, thin supersonic wings on the fuselage, there being trailing edge flaps carried by the wings, the flaps configured to provide flap deflection to simultaneously control wing twist and to reduce drag, when the aircraft is operated at subsonic flight conditions.

The invention discloses a bogie with internally-arranged axle boxes for a broad-gauge subway vehicle. The internally-arranged axle box structures are adopted; first hanging devices adopt quasi-rotary-arm-type positioning, spiral steel spring sets and rotary arm positioning rubber joints are symmetrically arranged on the two sides of axle box bodies, and stiffness matching is conducted through therotary arm positioning rubber joints; second hanging devices comprise air springs, vertical vibration reducers, horizontal vibration reducers, side-rolling prevention torsion bars and the like, thus vibration and impact are reduced, and taking comfort is improved; basic braking devices comprise axle-mounted disc-type braking units and are arranged on the outer sides of wheels; a traction motor isfully suspended, and gear transmission is two-stage decelerating transmission; and adapters are mounted at the axle ends for providing mounting interfaces for speed sensors. The problem that a bogie cannot be provided with a current collector due to the 1676 mm wide gauge of an Indian subway and the excessively-small distance between a third rail and a running rail is solved; the torsion stiffnessof the bogie and the horizontal span of the first hanging devices on the left and right sides are reduced, and the curve negotiating property is improved; and the structure is compact, the function is complete, and safe operation of the vehicle can be ensured.

The invention belongs to a vehicle transmission, and provides a vehicle hybrid power system achieving multi-power-source coupling. The problems that as for an existing hybrid power system, a motor isexcessively large in torque and excessively low in rotating sped, and thus the system is large in size, large in weight and high in cost are solved. The vehicle hybrid power system comprises an engine, a first motor, a second motor, a speed reducer and an output flange disc; the speed reducer comprises a speed reducer box, an input shaft and an output shaft, and further comprises a one-way clutch,a planetary gear train, a first motor gear pair and a second motor gear pair which are arranged in the speed reducer box; the planetary gear train comprises a sun gear, a planetary frame, a gear ringand planetary gears; one end of the input shaft is arranged on the speed reducer box and connected with engine output, and the other end of the input shaft is arranged on the gear ring; one end of the output shaft is fixedly connected with the gear ring, the other end of the output shaft is fixedly connected with the output flange disc, and outer teeth of each planetary gear are engaged with inner teeth of the gear ring and outer teeth of the sun gear correspondingly; and a first motor passive gear is arranged on the outer side face of the gear ring, and a second motor passive gear is coaxially and fixedly connected with the sun gear.

The invention relates to the technical field of micro electro mechanical systems, in particular to a double-layer comb tooth driving MEMS scanning mirror for a laser radar and a preparation method. The MEMS scanning mirror comprises a transparent glass cap, a rotary scanning mirror body and a silicon substrate. The rotary scanning mirror body comprises a square micro mirror, a first S-shaped torsion beam, a second S-shaped torsion beam, a rectangular inner-layer frame and a rectangular outer-layer frame; the outer-layer frame is coaxially arranged outside the inner-layer frame in a sleeving mode, and the two ends of the inner-layer frame are connected with the outer-layer frame through first S-shaped torsion beams respectively; the two ends of the micro mirror are correspondingly connectedwith the inner-layer frame through a straight connecting beam and a second S-shaped torsion beam in sequence, so that the micro mirror is movably mounted in the middle of the inner-layer frame; and driving voltage is applied to the comb tooth electrode layer, the upper electrode and the lower electrode, so that the micro mirror can rotate in the movable cavity. According to the preparation method, the bulk silicon processing technology and the SOI-based silicon-glass bonding technology are adopted to complete manufacturing and packaging of the MEMS scanning mirror, the processing efficiency is high, and the repeatability is high.

The invention discloses a low-frequency vibration isolation metamaterial shaft structure. The low-frequency vibration isolation metamaterial shaft structure comprises unit cell units arranged in a series connection manner. Each unit cell unit comprises a shaft base body, an elastic ring arranged on the outer circumference of the shaft base body in a sleeving manner, and a mass ring arranged on the outer circumference of the elastic ring in a sleeving manner. Each elastic ring is evenly provided with buffering grooves in the axial direction of the elastic ring. The low-frequency vibration isolation metamaterial shaft structure is used for replacing a traditional mechanical device shaft system and has the outstanding beneficial effect that the low-frequency vibration isolation capacity is high, a forbidden band can be formed within 0-100 Hz, and spreading of torsional vibration is inhibited; and meanwhile, the low-frequency vibration isolation metamaterial shaft structure has small reduction on torsinal rigidity of the shaft system, the transmission efficiency of the shaft system is not affected, the structure is simple, and basis materials in use are all conventional materials, and batched machining and production are easy. The low-frequency vibration isolation metamaterial shaft structure can be used for lowering, isolation and control of low-frequency torsional vibration and low-frequency noise in automobiles, trains, vessels, airplanes and other devices.

An air spring assembly for a motor vehicle, including an air spring, a rolling piston, a tubular rolling air spring bellows arranged concentrically about a central longitudinal axis of the air spring, and an air spring cover. A first partial air spring bellows has a first embedded textile reinforcement and a second partial air spring bellows has a second embedded textile reinforcement The first textile reinforcement has first reinforcing threads, the preferred axis of which extends parallel or nearly parallel to the axis of the central longitudinal axis of the air spring The second textile reinforcement has second reinforcing threads, the first preferred axis of which extends obliquely to the longitudinal axis of the air spring and the second preferred axis of which extends obliquely to the longitudinal axis of the air spring, wherein the first and the second preferred axis are at an angle to each other.

A longitudinal-drive bogie with built-in axle boxes comprises a frame (3) and axle boxes (12); the frame is formed by connecting two side beams (20) and first and second cross beams (23 and 26), boththe frame and the axle boxes are arranged within wheels (1), the two side beams are a traction motor (13) is mounted on each side beam through a motor hanger (21), output shafts of the two traction motors are perpendicular to axles (2), output shafts of the two traction motors are connected with the axles through couplings (16) and gearboxes (17), and the two traction motors are positioned betweenthe first and second cross beams (23 and 26); only one flange brake disc (18) is arranged on one axle and is fitted to a brake caliper (9) on the frame; a traction block (22) is arranged on the firstcross beam, the first cross beam is fixedly connected with one end of a traction pull bar through the traction block (22), and the other end of the traction pull bar is fixed to a vehicle body.

The invention discloses a maglev train and a running gear thereof, wherein the running gear comprises two suspending frames which are arranged in the driving direction at intervals and connected through a longitudinal beam. Slots which reduce the torsional rigidity of the longitudinal beam are formed in the circumferential wall of the longitudinal beam, the torsional rigidity of traditional longitudinal beams can be reduced, the coupled effect between the two suspending frames which are connected through the longitudinal beam can be relieved and then difficulty and energy consumption of suspension control are greatly reduced; the suspending frames are connected with a train body through air springs which have large displacement in lateral and vertical directions respectively, not only is flexible supporting to the train body realized, but also traditional secondary suspension structures can be substantially simplified, and the weight of the running gear is reduced; a vertical shock absorber and a lateral shock absorber with proper damping values are arranged between the suspending frames and the train body to attenuate vibration of the train body and improve stability and comfort level during the train travelling. In addition, a lateral stopper and a vertical stopper are arranged between the suspending frames and the train body and can stop the train from over lateral moving, rollover and overturn in the operational process.

The invention discloses a compact bogie with built-in axle boxes for high-cold subway vehicles and belongs to the field of bogie devices for railway vehicles. The compact bogie with the built-in axleboxes for high-cold subway vehicles comprises two drive devices, two brake devices, two wheel set devices, a compact casting structure, a compact secondary suspension system and two wheel set built-inaxle box devices, wherein each wheel set device comprises an axle and wheels arranged at two ends of the axle symmetrically, each drive device comprises a traction motor and a gearbox, and each brakedevice comprises two wheel set brakes. The compact bogie with the built-in axle boxes for high-cold subway vehicles has the advantages that a bogie fixed wheel base is reduced substantially while structural strength is ensured, and yaw angle stiffness of wheel sets and distorsion stiffness of the bogie are both reduced effectively, so that a rotation radius of the bogie is decreased, the curve passage capacity thereof is improved to meet the anti-collision requirements of horizontal damping and curve bends completely, and the space occupied by a retainer of a previous horizontal buffer is saved; by the aid of a snow plow device and three-rail ice-snow scraper devices, the compact bogie is applicable to high-latitude extremely-cold regions.

An object of the present invention is to provide improved torsional rigidity of an elastic coupling for use in a marine engine which couples an engine to a reversing gear. The elastic coupling comprises at least one low-rigidity element providing torsional rigidity during transmission of a predetermined low torque; and at least one high-rigidity element providing, during transmission of a predetermined high torque, torsional rigidity higher than that provided by the low-rigidity element.

A walkway installation includes a walkway assembly which includes at least one tread module supported by a pair of spaced apart elongate supports which extend in the direction of the length of the walkway installation, the walkway installation additionally including a handrail assembly including a handrail which extends in the direction of the length of the walkway assembly and a plurality of spaced apart posts which each secure the handrail relative to the walkway assembly, the handrail assembly additionally including a first connector which secures a post to one side of the walkway assembly and the first connector having secured thereto a substantially inflexible transverse link which extends across the walkway assembly in a direction perpendicular to the length of the walkway installation, the transverse link extending to a second connector secured to the other side of the walkway.

The invention discloses a compact type bogie with internally-arranged axle boxes for a subway vehicle and belongs to the field of bogies for subway vehicles. The compact type bogie comprises two driving devices, two braking devices, two wheel pair devices, a compact type cast framework, a compact type secondary suspension system and two wheel pair internally-arranged type axle box devices. The wheel pair devices comprise axles and wheels symmetrically arranged at the two ends of the axles, the driving devices comprise traction motors and gear boxes, and each braking device comprises two wheelpair brakes. The fixed axle distance of the bogie is reduced substantially while structural strength is guaranteed, the yaw angle rigidity of wheel pairs and the warping rigidity of the bogie are reduced effectively, accordingly the gyration radius of the bogie is decreased, the small-radius curve passing capacity of the bogie is improved, the transverse damping requirement and the anti-collisionrequirement on a curve bend can be met completely, and the occupied space of an original transverse buffer stopping seat is saved.

A twist element for a bearingless rotor is made mostly of composite fiber material and has a cross section with a substantially symmetric, flattened shape that has approximately the contour of a horizontal, central section of a double cone. In addition, a bearingless rotor having at least one such twist element. and a rotorcraft, particularly a helicopter, having at least one rotor with at least one such twist element are provided.

The invention discloses a torsion shock absorber, a transmission shaft and a vehicle. The torsion shock absorber comprises a tubular skeleton and a damping shaft core arranged in the tubular skeletonand further comprises a plurality of elastic parts connected between the tubular skeleton and the damping shaft core. The elastic parts are arranged along the outer surface of the damping shaft core at intervals. The elastic part axial projections located at the end of the torsion shock absorber are distributed and arranged in the circumferential direction at intervals. In this way, normal twisting of the damping shaft core relative to the tubular skeleton can be ensured, friction between the elastic parts and the tubular skeleton and the damping shaft core is reduced, and heat effect on the elastic parts is weakened; and in addition, gaps between the elastic parts provide deformation spaces of the elastic parts, the fact that the elastic parts are forced to be plastic-deformed or damageddue to no deforming spaces is prevented, the durability of the elastic parts is improved, and the service life of the torsion shock absorber is prolonged.

The invention provides a pneumatic anti-effect wing comprising a flexible wing which comprises a plurality of wing sections arranged in parallel and a flexible wing beam threaded through the plurality of wing sections. The invention also provides a pneumatic anti-effect generator comprising a support device and the flexible wing which is rotationally coupled with the support device. The pneumatic anti-effect wing can conveniently generate the distinct manipulated anti-effect phenomenon. Wherein, the singly threaded wing beam and the wing sections lead the torsional rigidity and rigidity center of the wing to be manipulated easily; an opening beam is adopted as the singly threaded wing beam to lead the wing to get a smaller torsional rigidity and an enough flexible rigidity so as to lead the generator to generate the manipulated anti-effect phenomenon under a lower wind speed; sub wings with the different symmetrical deflection can be adopted so as to demonstrate that the anti-effect speed of the manipulated anti-effect is not impacted by the deflection of the sub wings; and a chuck-style body leads the generator to be characterized in that the wings can be conveniently demounted and displaced.

The twist axle assembly includes a pair of spaced apart trailing arms and a twist beam of which extends in a first direction between the trailing arms. The twist beam includes a pair of end portions and a middle portion. The twist beam further has a pair of side walls and at least one additional wall that extends between the side walls. The side walls in the middle portion are generally parallel with the side walls of the end portions. The twist beam is generally hour-glass shaped with the middle portion having a first width and the end portions have a greater second width. The twist beam also tapers from the first width of the middle portion to the second widths of the end portions for gradually increasing a torsional stiffness from the middle portion to the end portions.

A connecting strut for a chassis of a vehicle comprises an elongated carrier which has at least two carrier elements spaced apart from each other. The carrier elements are connected with each other at their ends by means of a respective connecting element. The carrier has a low torsional stiffness and a high bending stiffness with respect to its longitudinal axis.

Bearing for a motor vehicle, with an inner part 1 with an outer surface 7 having a first undulated contour 10 extending in a longitudinal direction L, an outer sleeve 2 surrounding the inner part 1 and having an inner surface 11 with a second undulated contour 14 extending in the longitudinal direction L, an undulated elastomer body 6 disposed between the two corrugated contours 10, 14 and extending in the longitudinal direction L. The elastomer body 6 connects the inner part 1 with the outer sleeve 2. The two undulated contours 10, 14 do not run equidistant relative to each other.