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131results about How to "Reduce deceleration" patented technology

Milling method of high-precision suspended web

The invention discloses a milling method of a high-precision suspended web. The milling method is used for efficient and stable milling of a large-size suspended web structure and comprises the stepsthat the glossy face of a part is subjected to rough milling, and the technical allowance is reserved; a frame face is subjected to rough milling, the technical allowance is reserved, and a pluralityof false bosses are reserved according to the structural characteristics, so that the structural rigidity of the part is improved; the frame face is pressed in an unstressed mode, a positioning datumface is corrected, and thus the situation that the machining error is caused by part deformation is prevented; a glossy face web is subjected to semi-fine milling, and the small allowance is reserved;and the glossy face web is subjected to finish machining in place in modes of a small-diameter tool in small cutting quantity and back-and-forth feed, and thus the situations that cutter back-off deformation is caused by the large cutting quantity, and the surface quality of a part becomes poor due to trajectory change and acceleration and deceleration of a machine tool are prevented. The millingstability of the large-size suspended web structure is effectively improved, the part machining efficiency and the surface quality integrity are improved, and reworking polishing of a bench worker isreduced.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Aircraft wheel and landing-assisting method

The invention discloses an aircraft wheel and a landing-assisting method. The aircraft wheel comprises a tire, an outer hub and a core part, wherein the tire is arranged on the outer hub in a sleeving manner; the core part is arranged in a cavity of the outer hub; a plurality of pieces of permanent magnet steel are arranged on the inner surface of the outer hub; the core part comprises a plurality of coil groups, a brake resistor, a controller and a wheel shaft; the plurality of coil groups are distributed in the outer edge area of the core part and correspond to the plurality of pieces of permanent magnet steel; the controller is electrically connected with the plurality of coil groups and the brake resistor respectively; the wheel shaft is located on the central axis of the core part; the outer hub is arranged on the wheel shaft in a sleeving manner; the core part further comprises a stator iron core and a fixed frame, the stator iron core is arranged on the fixed frame in a sleeving manner, the plurality of coil groups are arranged on the stator iron core, and the wheel shaft is arranged at the center of the fixed frame. The aircraft wheel is capable of effectively reducing the slide friction force and the deflection torque stressed by contacting to earth when an aircraft lands, thus greatly improving the safety.
Owner:GUANGZHOU INST OF RAILWAY TECH

Precision instrument device buffering shock absorbing transport semitrailer

The invention relates to a precision instrument device buffering and shock absorbing transport semitrailer.Through mutual cooperation and complement of three layers of buffering and shock absorbing, buffering and shockabsorbing of a precision instrument device are completed from different angles taking into account particular emphasis, a first layer of bufferingand shock absorbingpasses through a gooseneck, vertical vibration between a tractor and a gooseneck connection part of a load trailer is reduced, and the vibration in the travelingdirection between the tractor and the load trailer is also reduced; according to a second layer ofbuffering and shock absorbing, through a double shock absorbing suspension system cooperating a suspension lifting cylinder and a torsion bar spring, swaying and impact of the loadtrailer when encountering uneven road surface are retarded, and it can be ensured that the vibrationduring emergency braking is significantly reduced; and according to a thirdlayer of buffering and shock absorbing,through an active buffering mechanismof a device transportation platform, impact and vibration on the precision instrument device in the driving direction during braking of the semitrailer are reduced. The threelayers of buffering and shock absorbing protect the precision instrument device in all directions layer upon layer, and the transportation safety of precision instrument deviceiseffectively protected.
Owner:LIANGSHAN FEICHI TRAILER MFG

Novel anti-climbing energy absorbing device

Provided is a novel anti-climbing energy absorbing device. The novel anti-climbing energy absorbing device comprises an anti-climber module, a middle composite structure energy absorbing unit module, a two-sides energy absorbing unit module, an end beam module, a coupler mounting support seat and a pin connecting module; the anti-climber module and the end beam module are welded together, and are fixed by an inclined support beam; one end of the middle composite structure energy absorbing unit module is fixed on the anti-climber module, the other end of the middle composite structure energy absorbing unit module is fixed on the end beam module; one end of the two-side energy absorbing unit module is fixed with the anti-climber module, and the other end is fixed on the end beam module; an upper cover plate and a lower cover plate are connected with the anti-climber module and the end beam module respectively; the coupler mounting support seat is welded with the anti-climber module. In the novel anti-climbing energy absorbing device, the energy absorption capacity is no less than 1.22MJ, the impact force is no greater than 4450kN, vertical compression force of 1424kN can be withstood, and vertical force of 1224kN and lifting force from perpendicular direction of plus or minus 356kN can be withstood at the same time. When a collision accident occurs to a vehicle, the vehicle is prevented from climbing vertically, and the anti-climbing energy absorbing device is involved in absorbing kinetic energy of the collision, the structure of the vehicle body is kept intact, the deceleration passing to passengers is reduced, and passenger casualty is prevented.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD

Method for absorbing a vehicle impact using kinetic friction force and rolling force produced by the dragging of a surface of rolled tube, and vehicle impact absorbing apparatus using same

A method for absorbing vehicle's impact includes primarily absorbing impact energy of the vehicle by dragging action of a front barrier and a first dragging kinetic frictional rolling force inducing member that are sequentially inserted and installed in a front end portion of a rolled tube made of a soft material, so that a maximum deceleration of the vehicle slows to 20 g or less. The method further includes dragging a second dragging kinetic frictional rolling force inducing member having a kinetic friction coefficient larger than that of the first dragging kinetic frictional rolling force inducing member and installed at an intermediate portion of the rolled tube to secondarily absorb and reduce kinetic energy. The method further includes drag a rear barrier and a third dragging kinetic frictional rolling force inducing member that are installed along a stopper distance, so that a kinetic frictional force of the vehicle becomes a maximum stop frictional force in a state in which kinetic friction coefficients of the first dragging kinetic frictional rolling force inducing member and the second and third dragging kinetic frictional rolling force inducing members and are added.
Owner:IMPACT BLACK HOLE

Small-sized single-rotor unmanned helicopter speed change system

The invention provides a small-sized single-rotor unmanned helicopter speed change system, which comprises an engine, a gearbox and a tailing box, wherein the gearbox comprises a box base and a box upper cover; the box upper cover is arranged on the box base in a sealed way; an inner cavity is formed between the box upper cover and the box base; and the small-sized single-rotor unmanned helicopter speed change system also comprises a one-stage transmission mechanism, a tail rotor mechanism and a propeller mechanism. The small-sized single-rotor unmanned helicopter speed change system has the advantages that a transmission system only has two-stage transmission; and a tail rotor and a propeller obtain power from two-stage transmission. Compared with the three-stage transmission of the existing small-sized single-rotor unmanned helicopter speed change system, the small-sized single-rotor unmanned helicopter speed change system has the advantages that the transmission stages are reduced; the transmission noise is reduced; the transmission efficiency is improved; components are reduced; the weight is reduced; the load on the engine during the flight is reduced; the gearbox part only comprises one-stage transmission; during the operation, the vibration is reduced, so that the interference of the vibration on electronic equipment is reduced; and the flight safety and the flight reliability are guaranteed.
Owner:衡阳云雁航空科技有限公司
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