141 results about "Vertical stiffness" patented technology

A bracket includes a rigid member that can be fastened to a fixture such as a wall, and flexible elements depend downwardly from the rigid member and are engaged with a tubular motor assembly of a window covering, awning, projector screen, or the like, to couple the motor assembly to the fixture while attenuating the propagation of vibrations from the tubular motor assembly to the fixture. This reduces noise in the room. The flexible elements may be flexible strings, elastic strings, or coil springs and have horizontal stiffness coefficients much lower than the vertical stiffness coefficient.

A sole structure for an article of footwear is provided. The sole structure extends longitudinally from a back edge to a front edge of the article of footwear and transversely from a medial side to a lateral side of the article of footwear. The sole structure includes an outsole having a ground-contacting layer. A first rib projects upward from the ground-contacting layer. The rib has side walls and an end wall. A channel is defined by the side walls and end wall. The channel opens downward through the ground-contacting layer and has a depth extending above the ground-contacting layer. The rib may have a multi-stage vertical stiffness profile. The sole structure may include a midsole attached to the outsole. An article of footwear having the sole structure attached to an upper is also provided.

The invention described herein provides a non-pneumatic deformable structure having a variable stiffness spoke assembly that provides a method of adjusting the vertical stiffness. The structure comprises an outer annular band having a predetermined stiffness, a set of spoke elements having an outer end and an inner end, where the outer end is connected to the outer band, with the spoke element extending inward and having its inner end connected to a hub, the hub being configured to attach the structure to a vehicle axle or other apparatus capable of rotation about an axis. Each of the spoke elements has a curvilinear length greater than the length of a straight line segment extending from a point of connection of the outer end of the spoke element with the outer annular band to a point of connection of the inner end of the spoke element to the hub. The outer end of said spoke element is tangent to the straight line segment, and the inner end of said spoke element is tangent to the straight line segment.

The integrated lead suspension assembly comprises several improvements. An oversized terminating pad for the electrical traces and a smaller adjacent insulation layer on the flexure assembly enable laser solder ball bonding of the pads to the read / write terminal contacts on the slider without clamping operation. Consequently, the tip of the load beam can be made narrow for a structure that provides for head loading and unloading functions, which improves the dynamic performance of the suspension assembly. The flexure assembly is configured such that it requires no permanent bending in its forming process, and any permanent bending required is done to the load beam. The limiter that limits the travel of the flexure assembly is formed on the load beam and it is bent to the functional position only after attachment of the flexure assembly to the load beam. The limiter is configured and positioned at the leading edge side of the slider to optimize the unloading process and to minimize the possibility of disengagement of the limiter and the flexure assembly during high shock environment. Asymmetric backing branches are provided for the read and write traces in the flexure assembly located at the hinge area of the load beam, the widths of which are sized to optimize the dynamic signal performance of the read and write traces without impact on the vertical stiffness of the suspension. Low profile flanges at 30°–60° that bend from the plane of the load beam are provided along the edges of the load beam to optimize bending stiffness and flow induced vibration. Dimples are provided along the load beam to facilitate insertion of a plastic head separation tool.

A device (96) includes a microelectromechanical (MEMS) sensor (40). The sensor (40) includes a movable element (42) adapted for motion in a direction (44) and an anchor (46) coupled to a substrate (48). The MEMS sensor (40) further includes spring members (50) interconnected between the movable element (42) and the anchor (46). Each of the spring members (50) includes beams (56, 58, 60) arranged in substantially parallel alignment, with the beam (60) positioned between the other beams (56, 58). Each of the beams (56, 58) is coupled to the anchor (46) and the beam (60) is coupled to the movable element (42). Each of the spring members (50) further includes a support structure (64) joined with the beams (56, 58) to provide vertical stiffness to the beams (56, 58) of the spring member (50).

The invention relates to a design method and a device of an anti-impact vibration isolation type magnetorheological pier bearing-damper system. According to the method, magnetorheological elastomers which are large in vertical stiffness, high in structural strength and adjustable in elasticity modulus are used as bearing bodies, and impact resistance and vibration isolation of a pier-beam structure under the action of large load are realized by adjustment of pier stiffness; a magnetorheological damper capable of providing large damping without medium settlement is used as a damping device, three-dimensional rotation capacity of the damper is improved by using a ball-and-socket joint mode at two ends thereof, and pier-beam displacement is restrained by damping adjustment for further vibration reduction and energy dissipation; magnetorheological elastomer bearings, the magnetorheological damper and a controller jointly form an anti-impact vibration-isolation pier bearing device, the controller intelligently adjusts stiffness and damping of the bearing-damper system by detecting the impact vibration of a bridge, structural strength of the pier-beam structure is improved while damping ratio thereof is increased, and when the bridge is under large-load impact vibration, impact transmission is slowed down or isolated and pier-bean displacement is restrained so as to guarantee structural safety of the bridge.

The invention provides a novel three-dimensional seismic isolation device which comprises a horizontal seismic isolation component, a transition steel structural platform and a vertical seismic isolation component. The horizontal seismic isolation component is fixedly connected with the vertical seismic isolation component by the transition steel structural platform; and the vertical seismic isolation component comprises an upper sleeve, a lower sleeve, a lower bottom plate, a belleville spring, a middle guide rod and viscous damping fluid. The novel three-dimensional seismic isolation device is simple and convenient to manufacture and is convenient to construct, install and maintain; horizontal damping and vertical damping are decoupled mutually and are not involved mutually. Due to adoption of the belleville steel plate spring, the novel three-dimensional seismic isolation device has low vertical stiffness when vertically moving, so that the vertical period of an upper structure is prolonged and the earthquake action is reduced; and meanwhile, a good viscous hole is formed by a gap between the belleville spring and the lower sleeve for the viscous damping fluid in the lower sleeve and a butterfly steel plate takes an effect of a piston in a viscous damper, so that the vertical earthquake action is further reduced by energy dissipation and safety of the upper structure is ensured.

The invention discloses a building structure foundation module having three-dimensional shock isolation and vibration attenuation functions. The building structure foundation module mainly comprises asteel structure small platform, a sliding support, a variable vertical stiffness combination laminated special rubber / steel plate support having a vertical self-regulating deformation capability, andviscoelastic damping energy absorption shock absorbers, wherein the centers of the viscoelastic damping energy absorption shock absorbers are connected in parallel; the sliding support uses an oily self-lubricating liquid phase-solid phase material, the coefficient of sliding friction is relatively low, the horizontal seismic component is effectively stopped from transferring to an upper structure, the shock absorber and a liquid / solid special rubber support having a damping characteristic are connected together in parallel and have a vibration attenuation effect, so that the effects of three-dimensional shock isolation, vibration attenuation and protection are achieved. The technical scheme has more sensitive and efficient actions on the earthquake.

The invention discloses a tire stiffness testing device used for measuring the vertical stiffness, the longitudinal stiffness and the lateral stiffness of a tire and completing measurement of coupling stiffness. The tire stiffness testing device comprises a vertical loading device, a lateral loading device, a longitudinal loading device, a base, a rack, a roll axis, a connecting piece, expansion connecting sleeves, a first plane connected with the base through a longitudinal steel rail, and a second plane connected with the first plane through a transverse guide rail; the connecting piece, the first plane and the second plane are each provided with a linear displacement sensor; the roll axis is connected with the connecting piece through the two expansion connecting sleeves; the connecting piece is provided with a six-component-force sensor; through holes matched with two guide rails of the rack are formed in the connecting piece. The tire stiffness testing device is simple in structure, reasonable in design and capable of measuring acting force in all directions of the tire, linear displacement sensors of the loafing devices can measure displacement of the tire in all the directions, and the stiffness, in all the directions, of the tire and the coupling stiffness of the tire can be obtained through calculation.

A railway vehicle including a plurality of bogies is provided. Each bogie includes a chassis, two front wheels and two rear wheels. For each front wheel and each rear wheel, a guidance device is provided for guiding the wheel in rotation and a primary suspension device of the chassis is provided on the guidance device. At least the primary suspension devices associated with the front and rear wheels are arranged on the same first lateral side of the bogie. The primary suspension devices each include two longitudinal connecting rods, each connected by a first connection point to the chassis and by a second connection point to the corresponding guidance device and at least one resilient component inserted between the two connecting rods to define at least the vertical stiffness of the primary suspension device, the two connecting rods being offset longitudinally relative to one another. Each of the bogies also includes a pivot connection device for connecting the bogie to the railway vehicle.

The invention provides a vibration isolation device for combining high and low frequency vibration. The vibration isolation device is composed of a base, a concave support table, a fixed bottom plate, a frame, a vertical stiffness-damping mechanism, a locking clamp, a horizontal stiffness-damping mechanism, a movable hinging chain seat, a guide rod and a straight line bearing. A realization device of nonlinear stiffness and nonlinear damping is provided based on special vibration isolation performances of the nonlinear stiffness and the nonlinear damping. A stiffness-damping mechanism comprised by the realization device has low dynamic stiffness to enlarge vibration isolation band and has high static stiffness to ensure that static deformation is small and does not lose stability; and the realization device also uses nonlinear damping to together suppresses the height of formant, and while reducing the height of the formant, the formant is moved left to broaden the vibration isolation frequency band and to suppress the transmission rate at high frequencies.

The invention belongs to the aircraft strength test technology, and relates to a chuck-type wing loading device, which includes a pulling plate bolt, a pulling plate, a loading chuck, a loading wood block, a square rubber pad, a chuck compression bolt, a chuck connecting bolt, a bush, a spring washer, a rear spar, a wing profile, a rear spar actuator cylinder, a front spar and a front spar actuator cylinder. The invention is solid in mounting, the test load is accurately applied, the front spar load applying and the rear spar load applying are not influenced by each other, the device weight is accurately deducted, and the device does not increase the vertical stiffness of the wing profile.

A fabricated energy dissipation frame shear wall is composed of beam steel channels, column steel channels, a steel plate wall, joint pin shafts, joint bolts, frame bolts, interior doubler plates, reinforced bolts and steel channel reinforcing ribs. A frame beam is composed of two beam steel channels. A frame column is composed of two column steel channels and two interior doubler plates. Flanges of the beam steel channels are cut off at the joints of beam columns. The beam steel channels are inserted into the positions, corresponding to the interior doubler plates, of the interior of the frame column. The steel plate wall is sandwiched by beam column webs from the two sides correspondingly and fixed through the frame bolts on a frame, the joint pin shafts and the joint bolts, and the joint pin shafts and the joint bolts are located at the joints of the beam columns. The steel channel reinforcing ribs are fixed to the steel plate wall through the reinforced bolts. The fabricated energy dissipation frame shear wall has large horizontal stiffness and vertical stiffness, the anti-seismic performance of the steel plate shear wall is improved, the steel plate shear wall and energy dissipators are integrated, mass production is facilitated, and the fabricated energy dissipation frame shear wall can be widely applied to anti-seismic energy dissipation of fabricated structures.

The invention relates to a high-speed train set body elastic mode vibration control method. The method comprises the following steps: S1, a train set body entity model is acquired, elastic mode vibration energy distribution is acquired, and a train set body vibration control target mode is determined; S2, mounting positions of multiple bottom suspension devices are determined, and an equivalent modal mass of the train set body vibration control target mode located at each bottom suspension device mounting position is determined; S3, natural frequency and a damping ratio of a vibration reduction system for each bottom suspension device are determined; and S4, transverse stiffness, vertical stiffness and a damping coefficient of the vibration reduction system for each bottom suspension device are determined. Compared with the prior art, the method of the invention does not need to change the original light-weight train set body structure but realizes control on multi-order elastic modal vibration of the train set body, the train set operation stability is enhanced, the train set riding comfort is improved, the principle is clear, the execution is convenient, the cost is low, and the method is applied to control on the high-speed train set body elastic mode vibration.

A coil car has a pair of deep side sills and a trough structure mounted to, and suspended between, the deep side sills for carrying coils. The side sills extend between the rail car trucks and act as a pair of deep side beams for carrying vertical loads. The deep side sills are arranged to extend above and below the center sill of the coil car to give vertical stiffness to the coil car. The top chord members of the side sills are outwardly splayed relative to the bottom chord members of the side sills. Cross-bearers extend outwardly and away from the center sill to attach to the side sills. The trough structure has three parallel, longitudinally extending troughs—a central trough lying between two laterally outboard outer troughs. Each trough is shaped to cradle steel coils, or other similar loads, between its inwardly and downwardly sloping shoulder plates. The shoulder plates are lined with cushioning to buffer coils during loading or travel. The outboard troughs are mounted above longitudinally extending stringers and are carried at a greater height relative to top of rail than the central trough. The car has coil stops to discourage longitudinal shifting of loaded coils. The coil stops have rollers to facilitate repositioning during loading, and a mid-span step and hand grabs to facilitate climbing over the coil stop by personnel walking along the trough structure.

The invention discloses a freight car bogie axle box positioning device. The freight car bogie axle box positioning device comprises an axle box body, a wheel set bearing arranged inside the cavity of the axle box body, an axle box end cover arranged at the external end of the cavity of the axle box body, an axle box elastic suspension system arranged between the top bearing platform of the rotating end of a positioning rotary arm and the front end of a frame, and a vertical hydraulic shock absorber arranged between the end portion of the frame on one side of the axle box body and the end portion of the rotating end of the positioning rotary arm; the fixed end of the positioning rotary arm is connected with a rotary arm seat at the bottom of the frame through an elastic positioning node combination; the axle box elastic suspension system comprises a rubber buffer pad, an internal steel spring, an external steel spring a first system rubber spring, wherein the top of the first system rubber spring is arranged on the upper end surface of the internal steel spring and the external steel spring. The freight car bogie axle box positioning device effectively reduce high-frequency impact during car high-speed running, and by means of the first system rubber spring with bearing and shock absorbing functions, the first system vertical stiffness of a loaded car working condition structural bogie can be increased, and stiffness variation of the axle box body of the structure bogie can be achieved.

The invention described herein provides a non-pneumatic deformable structure having a variable stiffness spoke assembly that provides a method of adjusting the vertical stiffness. The structure comprises an outer annular band having a predetermined stiffness, a set of spoke elements having an outer end and an inner end, where the outer end is connected to the outer band, with the spoke element extending inward and having its inner end connected to a hub, the hub being configured to attach the structure to a vehicle axle or other apparatus capable of rotation about an axis. Each of the spoke elements has a curvilinear length greater than the length of a straight line segment extending from a point of connection of the outer end of the spoke element with the outer annular band to a point of connection of the inner end of the spoke element to the hub. The outer end of said spoke element is tangent to the straight line segment, and the inner end of said spoke element is tangent to the straight line segment.

The invention provides an integrated tension cable-diaphragm structure of back cable open type and a construction method thereof. The tension cable-diaphragm structure comprises a dorsal chord, a vale cable, an interior cable composed of loop cables, and a dorsal cord set composed of an exterior spinal cord, a lateral spinal cord, and an inhaul cable and the like cable components arranged on the outer ring, tension modus holding stiffness is formed by the dorsal cord set, a connection point is provided for the dorsal chord by a mast, elevation difference is generated by the dorsal chord and the vale cable, vertical stiffness is generated by the overall structure and load capacity is provided. By the arrangement of the mast and the dorsal system, a radial cable and an outer ring steel structure are auto-balanced with an upper cable rod structure, the steel capacity of an annular girder is saved, the upper system is auto balanced in a circle direction, at the same time the former great moment at the top section of a lower strut structure is deducted, and the issue of big steel capacity of the exterior steel structure of a sports field with the indent tension cable-diaphragm structure is resolved. By the construction method of the integrated tension cable-diaphragm structure, a sub-step elevated integral tension construction method of the cable- diaphragm structure is adopted, the requirements of the shape of the programming structure after the completion of the reality outspread construction are met as pledged, and the whole construction process is manageable and efficient.

The invention relates to a tire testing machine which comprises a fixing device and a testing device, wherein the testing device is in contact with a tire on the fixing device through a loading device. The tire testing machine has the technical effects that (1) the tire is fixed on the fixing device, the testing device is in contact with the tire through servo system loading, and tire puncture, impression, vertical stiffness and other tests can be realized; (2) the loading device and the testing device are positioned in a foundation pit, so that high loading force can be provided for the testing device; (3) the tire is provided with a protective fence at the exposed part of the back of the testing device, so that potential risk of the test is avoided; (4) an isolated warning fence is arranged at the periphery of the foundation pit, so that an operator is prevented from dropping into the foundation pit due to slip.

The invention relates to a rail fastener used in rail transit. The rail fastener is used for solving the problem that existing rail fasteners large in rail position adjustment amount and good in damping performance are complicated in structure and high in price. According to the rail fastener, the parts of the rail fastener are manufactured through the combination of section steel rolling and machining. According to the structure of the rail fastener, the lower portion of an embedded base is embedded in a sub-rail foundation, the embedded base enables an elastic strip to generate fastening force together with a lock nut, the fastening force is applied to the sub-rail foundation through a gauge block, a rail, a rubber pad, a height-adjusting cushion plate and a shock pad to fix the rail in the vertical direction, the rail is fixed in the horizontal direction by the embedded base and the gauge block, the maximum adjustment amount of the rail height and the maximum adjustment amount of the gauge reach over 30 mm and 24 mm respectively, and vertical stiffness can be set to be low to increase the elasticity of the rail. The rail fastener has the advantages of being free of casting, free of plastic, high in strength, high in elasticity, large in adjustment amount, capable of guarding against theft, small in number of parts, low in manufacturing cost and the like and can be applied to ballast tracks, ballastless tracks and other types of tracks in rail transit and urban mass transit.

The invention discloses a combined vibration isolation mounting for subways. The combined vibration isolation mounting comprises an upper connecting plate and a lower connecting plate, wherein the upper connecting plate is located at the upper part, and the lower connecting plate is located at the lower part. The vibration isolation mounting also comprises a vibration isolation mechanism located between the upper connecting plate and the lower connecting plate. The vibration isolation mechanism is respectively and mutually connected with the upper connecting plate and the lower connecting plate to form an integral structure. The vibration isolation mechanism can be used for realizing a function of isolating subway vibrations. According to the combined vibration isolation mounting disclosed by the invention, vertical stiffness, horizontal stiffness and vertical damping can be adjusted. The function of isolating the subway vibrations is realized by the vibration isolation mechanism. The vibration isolation mounting can be applied to a subway floating slab system.

The invention discloses a cable-stayed flexible photovoltaic bracket unit and a photovoltaic bracket. The bracket unit comprises two oppositely arranged upright posts, a stabilization cable and a plurality of main diagonal cables are arranged between the two upright posts, and the two ends of the stabilization cable are respectively connected to the lower parts of the upright posts on the corresponding ends; all main diagonal cables are divided into two groups, each group at least comprises one main diagonal cable, the upper ends of all main diagonal cables of each group are connected to the upper parts of the upright posts on the corresponding ends, the lower ends of the two groups of main diagonal cables are connected with a cross beam, and connection points are uniformly arranged alongthe length direction of the cross beam, and the cross beam is horizontally arranged; and a plurality of slings are equidistantly arranged between the cross beam and the stabilization cable along the vertical direction, the upper ends of all slings are connected with the cross beam, and the lower ends of all slings are connected with the stabilization cable. By adoption of an optimized self-balancing prestressed cable system, the vertical stiffness of the structure is improved, and the vibration problem under the wind load is solved, thereby significantly improving the spanning capability of the photovoltaic bracket, further reducing the floor space, and having relatively high adaptability on complex terrain areas.

The invention discloses a vertical vibration-damping anti-seismic supporting and hanging frame based on disc springs. The vertical vibration-damping anti-seismic supporting and hanging frame comprisesa first horizontal rod, a second horizontal rod, a first diagonal bracing rod, a second diagonal bracing rod, a first vertical rod and a second vertical rod, wherein the first horizontal rod is arranged above the second horizontal rod as well as positioned between the first vertical rod and the second vertical rod; vibration-damping assemblies are arranged between the first horizontal rod and thesecond horizontal rod; two ends of the first horizontal rod are correspondingly arranged in guiding sliding grooves on the inner sides of the first vertical rod and the second vertical rod; and the first horizontal rod is capable of moving up and down along the interiors of the guiding sliding grooves. The vertical vibration-damping anti-seismic supporting and hanging frame has the beneficial effects that the vertical stiffness of the two vertical rods is controlled by the disc springs, that is, the stiffness of the first vertical rod and that of the second vertical rod can be quickly adjusted by increasing or decreasing the quantity of the disc springs according to the specific conditions of the vertical vibration-damping anti-seismic supporting and hanging frame; a flexible vibration-damping and anti-seismic mechanism is provided for the vertical vibration-damping anti-seismic supporting and hanging frame; and the vertical vibration-damping anti-seismic supporting and hanging framehas the characteristics of being high in durability, short in stroke, heavy in load, small in occupied space, and flexible to dismount and mount.

The invention provides a three-dimensional vibration-insulation supporting seat of fiber magnetorheological fluid particles. The three-dimensional vibration-insulation supporting seat comprises an upper connecting plate, a horizontal vibration-insulation supporting seat body, a middle connecting plate and a vertical vibration-insulation supporting seat body; and the vertical vibration-insulation supporting seat body comprises a silicone oil storage chamber, a fiber magnetorheological fluid fine particle layer, a wire ring, a fiber magnetorheological fluid coarse particle layer, a lower connecting plate, a magnetic conductive guiding rod, a permanent magnet and a steel sleeve. The three-dimensional vibration-insulation supporting seat is constituted through series connection of the vertical vibration-insulation supporting seat body on the lower portion of the three-dimensional vibration-insulation supporting seat and the middle connecting plate and has a function that vertical stiffness can be adjusted; by adding fiberglass or carbon fibers in magnetorheological fluid, the compression-resisting strength of the magnetorheological fluid particles can be effectively improved; by installing the magnetorheological fluid fiber particle layers with two particle sizes, the resonance effect possibly caused by vertical stimulation can be avoided; and by exerting electric current in different directions and with different sizes, the a magnetic field generated by the permanent magnet can be strengthened or weakened, and further the adjustable range of stiffness of the magnetorheological fluid particles and the width of the vertical stimulation vibration-insulation frequency are enlarged.