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81 results about "Adjustable stiffness" patented technology
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Rigidity and energy dissipation adjustable composite energy dissipation bearing device
PendingCN121915859AProtective buildings/sheltersShock proofingStress concentrationAdjustable stiffness
The invention relates to the technical field of constructional engineering equipment, in particular to a rigidity and energy dissipation adjustable composite energy dissipation bearing device which comprises a first connecting plate, a second connecting plate, a first damping part and a second damping part. The first damping piece is arranged on the first connecting plate on the column body in a friction sliding mode, and the second damping piece is connected between the beam body and the first damping piece in an included angle mode, so that the flexural rigidity of the beam-column joint can be effectively improved under the action of frequent earthquakes, and the initial rigidity and lateral displacement resistance of the structure are enhanced; the rigid response performance of the structure under the action of small earthquakes is improved; the second damping piece can adjust the energy dissipation path through the change of the included angle between the length direction of the second damping piece and the axis of the column body in the earthquake action process, the friction sliding mechanism of the first damping piece is matched, the energy dissipation capacity of the joint under the earthquake action is effectively improved, and therefore structural stress concentration is reduced, and structural damage is delayed. The structure is light in weight, convenient to install and wide in application range.
Owner:CHINA CONSTR SCI & IND CORP LTD +1
Hardness-adjustable spring structure and spring bag
PendingCN121080775AStuffed mattressesSprings/dampers functional characteristicsAdjustable stiffnessMechanical engineering
The invention provides a hardness-adjustable spring structure which comprises a spring, an adjusting part and a wrapping part, the wrapping part is used for packaging the spring, and the adjusting part is used for adjusting the pre-tightening force of the spring; the adjusting piece is arranged at one end of the spring and extrudes the end of the spring; the adjusting piece comprises a rotating piece, a moving piece and a supporting piece, the moving piece is movably installed on the supporting piece, and the rotating piece is in linkage connection with the supporting piece; the rotating piece is rotated to drive the supporting piece to rotate, and the moving piece moves up and down along the supporting piece under the rotation of the supporting piece and extrudes the spring; the spring structure solves the problems that according to an existing spring structure, the pre-tightening force of a spring cannot be adjusted at will, the hardness cannot be adjusted during use, and the function is single.
Owner:NEW TEC INTEGRATION (XIAMEN) CO LTD
Passive-active adjustable stiffness heave compensation system based on underwater electro-hydraulic actuators
ActiveCN121206042BFluid-pressure actuator safetyFluid-pressure actuator testingMarine engineeringAdjustable stiffness
The application discloses a kind of active and passive adjustable stiffness heave compensation systems based on underwater electro-hydraulic actuator, including motion sensing control system, passive compensation hydraulic module, electro-hydraulic actuator active compensation hydraulic module, electro-hydraulic actuator rigidity module, sensor module.The application absorbs and releases energy by passive compensation hydraulic module under low frequency / large heave, maintains stable load, and the residual displacement after passive chain compensation is corrected in real time by electro-hydraulic actuator active compensation hydraulic module, and the compensation stiffness is set before operation or gap by electro-hydraulic actuator rigidity module, so that the system can obtain better dynamic performance and energy efficiency under different sea conditions.
Owner:ZHEJIANG UNIV
An electromagnetic quasi-zero stiffness vibration isolation device with adjustable stiffness
This invention provides an electromagnetic quasi-zero stiffness vibration isolation device with adjustable stiffness. It utilizes an electromagnetic coil to provide variable nonlinear negative stiffness, achieving quasi-zero stiffness characteristics. The invention includes a lower housing of a support, a lower end cover, a lower coil, a lower annular permanent magnet, a top block, an upper coil, an upper housing of the support, an upper end cover, a guide rod, an upper outer spring, an upper housing of the permanent magnet, an upper inner spring, an upper permanent magnet, an intermediate permanent magnet, a lower housing of the permanent magnet, a lower inner spring, and a lower outer spring. The permanent magnet and the electromagnetic coil provide variable nonlinear negative stiffness, achieving variable quasi-zero stiffness characteristics. This invention is particularly suitable for applications requiring isolation of wide-frequency excitations, including low-frequency ones.
Owner:FUZHOU UNIV
Rigidity-adjustable tensegrity floating type photovoltaic system based on air bag type pressure regulation and control method
PendingCN121990123AAdjustable structural stiffnessSuitable for long-term servicePhotovoltaic supportsPhotovoltaic energy generationAdjustable stiffnessNew energy
The invention belongs to the field of offshore new energy and space structure engineering, and particularly discloses a rigidity-adjustable tension integral floating type photovoltaic system based on air bag type pressure regulation and a control method, the photovoltaic system comprises a tension bearing structure, and the tension bearing structure comprises a plurality of hinge rod assemblies and cable components connected with the hinge rod assemblies; the floating body is arranged at the bottom of the tension bearing structure; the photovoltaic module suspension unit is matched with the tension bearing structure and is used for bearing a photovoltaic module; the air bag type constant-tension assembly is connected with the cable component and comprises an air bag, and the tension level of the cable component can be changed by adjusting the internal pressure of the air bag, so that the equivalent stiffness of the hinge rod assembly is adjusted. According to the invention, the equivalent stiffness of the whole structure can be adjusted, so that the adaptability of the floating photovoltaic structure to the marine environment load and the structural safety are improved.
Owner:NINGBO ORIENTAL UNIVERSITY OF TECHNOLOGY
Vibration isolation pad with adjustable rigidity
The utility model discloses a vibration isolator with adjustable rigidity, which relates to the field of vibration isolators and comprises a main support column, an outer mounting ring is horizontally welded on the outer side edge of the main support column, fixing through holes are uniformly formed in the top surface of the outer mounting ring, and a discharge side groove is horizontally formed in the outer side edge of the main support column. A placing channel is vertically formed in the top end of the main supporting column, a sealing cover plate is fixedly connected to the inner side edge of the placing channel through a horizontal bolt, a rotating top block is clamped to the top end of the main supporting column, a penetrating channel is horizontally formed in the outer side edge of the main supporting column, and a rotating disc is horizontally clamped to the inner side edge of the penetrating channel. Clamping through grooves are symmetrically formed in the top face of the rotating disc, main shock insulation pads are horizontally connected to the inner side edges of the clamping through grooves in a clamped mode, a modular replacement structure is adopted, so that the device is more convenient to adjust and replace, and meanwhile, the existing replacement and connection requirements are met through rotating type replacement operation.
Owner:YUNNAN TUMBLER SEISMIC REDUCTION & ISOLATION TECHNOLOGY SERVICE CO LTD
A robot polishing and finishing terminal three-degree-of-freedom series-parallel hybrid electromagnetic variable stiffness actuator
The application belongs to the technical field of mechanical transmission devices, and discloses a robot polishing and grinding terminal three-degree-of-freedom series-parallel hybrid electromagnetic variable stiffness actuator, which is a series-parallel hybrid variable stiffness structure, a single-degree-of-freedom electromagnetic direct-drive variable stiffness module, a two-degree-of-freedom parallel electromagnetic direct-drive variable stiffness module, and a carefully designed structural member and peripheral sensor system. The application realizes three-degree-of-freedom stiffness independent adjustment and driving force decoupling control. Through the series-parallel hybrid variable stiffness structure design, the Z-direction unit and the X-Y plane parallel system are separated in the structure level, and through the parallel configuration of the electromagnetic spring unit and the voice coil direct-drive motor unit, the equivalent stiffness adjustment and the active driving force output in each direction are independent of each other, so that the stiffness coupling problem in the traditional parallel mechanism is avoided, and the continuous adjustable stiffness and high-precision force control output in the three-degree-of-freedom directions are realized.
Owner:HUAZHONG UNIV OF SCI & TECH
An integrated variable stiffness grading variable-diameter anchor cable system and method
An integrated, graded, adjustable stiffness variable-diameter anchor cable system and method belongs to the field of mining and underground engineering support technology. The system comprises a hollow anchor cable body consisting of a first equal-diameter section, a variable-diameter section, a second equal-diameter section, and an exposed tensioning section, arranged from left to right. The diameter of the variable-diameter section gradually decreases from the large-diameter end to the small-diameter end in a continuous manner, with its large and small-diameter ends coaxially connected to the first and second equal-diameter sections, respectively. A grout outlet is provided on the right side of the variable-diameter section. A grout stop plug is fitted onto the left end of the second equal-diameter section. A sliding tray is fitted onto the outside of the exposed tensioning section. A locking device is fitted onto the outside of the exposed tensioning section and located on the right side of the tray. Resin anchoring agent is bonded to the outside of the first equal-diameter section. The method includes: drilling and anchoring; anchor cable installation and initial pre-tightening; surrounding rock deformation monitoring and stiffness requirement decision-making; controllable grouting based on stiffness adaptation; and stable support based on graded stiffness. This invention enables graded adjustment of support stiffness according to the stage of surrounding rock deformation.
Owner:CHINA UNIV OF MINING & TECH
An adhesive robot capable of stable compliant landing
The application discloses an adhering robot capable of stable and compliant landing, comprising a fuselage, a plurality of three-degree-of-freedom single legs arranged on the bottom side of the fuselage, an adhering foot sole arranged at the end of the three-degree-of-freedom single leg, and a single leg sub-controller, a main controller and a power battery arranged on the fuselage respectively, the three-degree-of-freedom single leg corresponding to the adhering foot sole and the single leg sub-controller one by one; the power battery is electrically connected with the three-degree-of-freedom single leg, the adhering foot sole, the single leg sub-controller and the main controller respectively; the single leg sub-controller is communicatively connected with the main controller and the corresponding three-degree-of-freedom single leg respectively; the single leg sub-controller makes the three-degree-of-freedom single leg and the adhering foot sole move according to the instruction of the main controller, so as to realize the walking and buffer landing of the robot. The adhering foot sole is used as a primary buffer mechanism, and the three-degree-of-freedom single leg is used as a secondary buffer mechanism with adjustable stiffness and damping, the adhering foot sole and the three-degree-of-freedom single leg jointly work to improve the success rate and stability of the robot and the target spacecraft adhesion, and effectively reduce the disturbance to the target spacecraft.
Owner:SICHUAN UNIV
A horizontal vibration isolation device with adjustable stiffness
This invention discloses a horizontal vibration isolation device with adjustable stiffness, comprising: a base plate; a middle plate, which is horizontally positioned above the base plate and forms a first vibration isolation layer with the base plate; an upper plate, which is horizontally positioned above the middle plate and forms a second vibration isolation layer with the middle plate; sliding tracks, a first set of sliding tracks symmetrically arranged on the left and right sides of the first vibration isolation layer, the upper and lower ends of the first set of sliding tracks being connected to the middle plate and the base plate respectively, a second set of sliding tracks symmetrically arranged on the front and rear sides of the second vibration isolation layer, the upper and lower ends of the second set of sliding tracks being fixedly connected to the upper plate and the middle plate respectively; spring fixing members, two sets of spring fixing members symmetrically arranged on the left and right sides of the upper surface of the base plate, and two sets of spring fixing members symmetrically arranged on the front and rear sides of the upper surface of the middle plate; and two spring connecting members, one of which is fixed to the middle plate and the other is fixed to the upper plate, with a supporting spring connecting each spring connecting member to each spring fixing member.
Owner:CHINA AVIATION PLANNING AND DESIGN INSTITUTE (GROUP) CO LTD
Rigidity-adjustable composite air spring
The utility model relates to a rigidity-adjustable composite air spring, which belongs to the technical field of air springs, and comprises a sealing ring, a sealing bearing, an anti-collision rubber pad, an upper electrified coil, a support piston rod, a cylinder barrel, an annular permanent magnet, a locking nut, a lower electrified coil and a membrane type air spring, and the annular permanent magnet is mounted at the support piston rod through the locking nut. According to the air spring, the characteristic that the rigidity of the electromagnetic spring can be changed to be positive and negative is utilized, so that the total rigidity of the air spring which is connected in parallel is reduced to be nearly zero under low frequency and small displacement, the effect of filtering low frequency vibration is achieved, the total rigidity is further improved under large displacement, the effect of improving the bearing capacity is achieved, and the service life of the air spring is prolonged. And compared with an existing electromagnetic composite air spring, the movable magnet does not penetrate through the interior of the static magnet, it is guaranteed that the size of the movable magnet can be as large as possible, and therefore the rigidity of the electromagnetic spring has a larger adjusting range.
Owner:XIAN HANSIKOTE AIR SUSPENSION SYSTEM CO LTD
Segmented stiffness adjustable shape memory alloy driven actuator and control method thereof
ActiveCN122008171BProgramme-controlled manipulatorMachines/enginesAdjustable stiffnessShape-memory alloy
This invention belongs to the field of intelligent actuators and flexible actuators, and relates to a segmented shape memory alloy driven actuator with adjustable stiffness and its control method. The actuator includes a flexible shell, an isolation element, a shape memory alloy driving element, and a phase change stiffness control material. The isolation element divides the flexible shell into multiple axially arranged cavity structures. The phase change stiffness control material fills each cavity, and the phase change temperatures are not completely identical. Each temperature parameter and driving force satisfies a preset matching relationship. The control method involves controlling the heating temperature of the shape memory alloy driving element to sequentially unlock the equivalent stiffness of the cavities through phase changes of the phase change stiffness control material. This allows for multi-segment controllable equivalent stiffness adjustment under a single driving source. The actuator of this invention has a simple structure and programmable response, making it suitable for soft robots, deformable support structures, and intelligent execution systems.
Owner:DONGHUA UNIV +1
A helical spring suspension with adjustable stiffness variation
The application relates to a stiffness-adjustable and transformable helical spring suspension, and relates to the technical field of vehicle machinery, which comprises two suspension devices arranged on the two sides of a vehicle body and connected with wheel shafts on the two sides of the vehicle body and a connecting mechanism for connecting the two suspension devices, wherein each suspension device comprises a rotating rod, a mounting frame, a pull rod, a buffer sleeve, a buffer spring and a fixing assembly. The mounting frame is driven to move by the wheel shaft of the vehicle body, the rotating rod and the pull rod are driven to move by the movement of the mounting frame, the damping sheet is driven to move by the movement of the pull rod, the buffer spring is extruded by the movement of the damping sheet, and the impact force generated by the movement of the wheel shaft is damped and buffered by the buffer spring.
Owner:ZHEJIANG FUCHUN SPRING CO LTD
Grabbing integrated continuum mechanical arm
The invention relates to the technical field of robots, in particular to a grabbing and taking integrated continuum mechanical arm. The mechanical arm comprises a driving mechanism, a coupling mechanical arm body and a grabbing mechanism which are connected in sequence; the coupling mechanical arm body is provided with driving ropes distributed in the circumferential direction and comprises a flexible rod and a plurality of spherical friction bodies arranged on the flexible rod in a sleeving mode, the spherical friction bodies are sequentially connected end to end, and serpentine springs distributed in the circumferential direction are arranged between the adjacent spherical friction bodies. An electromagnetic rigidity adjusting assembly is arranged at the bottom of the coupling mechanical arm body and used for adjusting friction force of the spherical friction bodies to achieve adjustment of the rigidity of the coupling mechanical arm body. According to the integrated continuum mechanical arm for grabbing, the continuum joints formed by coupling the serpentine springs and the spherical friction bodies are adopted, the rigidity is adjustable, and the load capacity is improved under the condition that the flexibility is guaranteed.
Owner:HEFEI UNIV OF TECH
Three-degree-of-freedom parallel electromagnetic variable stiffness actuator as an end effector for robotic grinding and polishing
ActiveUS20260021576A1Programme-controlled manipulatorGripping headsAdjustable stiffnessThree degrees of freedom
A three-degree-of-freedom parallel electromagnetic variable stiffness actuator as an end effector for robotic grinding and polishing, comprising: non-stiffness electromagnetic drive branches, an electromagnetic spring drive branch, structural components, and peripheral sensor systems. There are three non-stiffness electromagnetic drive branches; three-degree-of-freedom motion can be generated through these three non-stiffness electromagnetic drive branches. For the electromagnetic spring drive branch, its driving component is an electromagnetic spring, which is responsible for providing adjustable stiffness. The actuator achieves a high-precision, high-flexibility control of the grinding and polishing end through a unique three-degree-of-freedom parallel structure.
Owner:HUAZHONG UNIV OF SCI & TECH
Periodic vibration damping structure and method of mounting same
The present application is suitable for the field of structural engineering, and provides a periodic damping structure and a mounting method thereof, the periodic damping structure comprising a lattice framework and a vibrator unit, the stiffness of the vibrator unit being adjustable; the vibrator unit is detachably connected with the lattice framework, and the included angle between the vibrator unit and any side surface of the lattice framework is adjustable; the lattice framework is spliced, and then the vibrator unit is mounted in the lattice framework, and the stiffness of the vibrator unit is adjusted according to different frequency excitations; through the detachable connection between the vibrator unit and the lattice framework, and under the action of the vibrator unit with adjustable stiffness, the mounting mode and quantity between the vibrator unit and the lattice framework are changed, so that the change of the band gap characteristics in the structure under different frequency excitations is realized, and then the optimal vibration isolation effect can be obtained in different frequency ranges, and the present application can be widely applied to various use environments.
Owner:WUHAN HAIYI HIGH END EQUIP STRUCTURE DESIGN CO LTD +1
Pile foundation structure, construction method thereof and method for adjusting pile-soil load sharing proportion
The invention belongs to the technical field of constructional engineering, and discloses a pile foundation structure, a construction method thereof and a pile-soil load sharing proportion adjusting method. The pile foundation structure comprises a pile, a bearing platform located at the top of the pile, a cushion layer located below the bearing platform and a material layer located at the bottom of the cushion layer, the pile is embedded into foundation soil, and the top of the pile penetrates through the material layer and the cushion layer to penetrate into the bearing platform to be connected with the cushion layer and the bearing platform. The material layer is of a multi-layer composite structure and comprises a low-rigidity material layer and a high-rigidity material layer. Materials with different rigidities are adopted to form the rigidity-adjustable material layer, the rigidity of the material layer can be adjusted by adjusting parameters of the material layer, and then the load sharing proportion of the pile foundation and the soil body can be adjusted.
Owner:BEIJING JINGCHENG HUAYU ARCHITECTURAL DESIGN & RES INST CO LTD +1
A multi-stable variable stiffness restorable angular lock mechanism
A multi-stable variable stiffness recoverable angle locking mechanism belongs to the technical field of mechanical structure design, comprising a main branch arm, a secondary branch arm, a cantilever, an elastic key and a hinge shaft; the root of the main branch arm and the root of the secondary branch arm are hinged through the hinge shaft; the end of the main branch arm and the end of the secondary branch arm are both provided with an external hinge hole; the main branch arm is provided with an elastic key accommodation groove; the elastic key is located in the elastic key accommodation groove; one end of the cantilever is fixedly connected to the secondary branch arm, and the other end of the cantilever is a free end; the cantilever is provided with a locking tooth groove, and the locking tooth groove is engaged with the elastic key. The multi-stable variable stiffness recoverable angle locking mechanism realizes the integration of multi-stable state shape retention, continuous adjustable stiffness and quick self-recovery locking, only needs mechanical force to drive to realize action, only needs to rely on the cooperation of elasticity and geometric constraint to realize angle locking, and has the characteristics of simple and compact structure, rapid response, high recovery precision, multiple cyclic use, and strong environmental adaptability.
Owner:NORTHEASTERN UNIV CHINA
Aeroelastic model wind tunnel test device and method with continuously adjustable rigidity and damping
The invention discloses an aeroelastic model wind tunnel test device and method with continuously adjustable rigidity and damping, and belongs to the technical field of wind tunnel tests.The aeroelastic model wind tunnel test device comprises a wind tunnel test section, a test model and a test unit, and test holes are symmetrically formed in side plates of the wind tunnel test section; the test model is installed in the test hole in a penetrating manner and extends to the outside of the wind tunnel test section; the two sides of the test model are connected with test units through rigid extension rods. According to the aeroelastic model wind tunnel test device and method with continuously adjustable rigidity and damping, the equivalent rigidity and damping characteristics of the model can be adjusted continuously and independently by adjusting electric signals in the wind tunnel test process, so that the dynamic response of an actual flexible or elastic structure is simulated more truly, and the test efficiency is improved. And the accuracy, flexibility and test efficiency of wind effect evaluation are remarkably improved.
Owner:YANGTZE UNIVERSITY
A Real-Time Bending and Shaping Method for Virtual Plants Based on Adjustable Stiffness Weights
ActiveCN121145285Bhighlight substantive featuresSignificant progressGeometric CADVirtual/augmented realityAlgorithmAdjustable stiffness
This invention provides a real-time bending and shaping method for virtual plants based on adjustable stiffness weights. The method involves configuring virtual plant parameter information and generating a parameterized plant model. The parameter information includes at least plant parameter information, plant control parameter information, and environmental parameter information. When the interactive mode is activated and the plant end is dragged, the end of the plant model is acquired and fixed at the target dragged position. Based on the target dragged position, the dragged virtual plant structure undergoes weighted inverse dynamic bending processing and interpolation. Based on the updated dragged virtual plant structure, other branch structures of the virtual plant are updated synchronously. The overall updated virtual plant structure is subdivided and subjected to Catmull-Rom curve interpolation. The interactive mode is then terminated, and the currently updated virtual plant structure is solidified. This invention uses gradual stiffness, mass curves, and weak bending moment constraints to make the bending shape of the virtual plant highly similar to the stress on real branches.
Owner:HENAN WEIDA ELECTRONIC TECH CO LTD
Balancing rod capable of adjusting rigidity and installation distance and control method thereof
Owner:TAIZHOU JIAHE AUTO STAMPING PARTS CO LTD
Shock absorber with adjustable rigidity
The invention relates to the technical field of hydraulic transmission, in particular to a rigidity-adjustable shock absorber which specifically comprises a barrel and a first spring, and one end of the first spring is fixed outside the barrel; the other end of the first spring is fixed outside the electro-hydraulic actuator, the electro-hydraulic actuator comprises a connecting part and an actuating part, and the connecting part is arranged at one end of the actuating part; the piston rod is arranged in the cylinder in a sliding mode in the axial direction, one end of the piston rod extends out of the cylinder to be connected with the connecting part, the other end of the piston rod is provided with a piston valve plate part and a magnetostriction part, and a second spring is arranged between the magnetostriction part and the piston valve plate part and abuts against the magnetostriction part and the piston valve plate part; when the magnetostriction part generates axial telescopic deformation due to the change of a magnetic field, the pre-tightening force of the second spring is changed, and when the actuating part axially moves in the electro-hydraulic actuator, the connecting part drives the piston rod to move, and then the pre-tightening force of the first spring is adjusted. The rigidity of the main spring and the rigidity of the valve plate of the shock absorber are continuously adjusted.
Owner:ZHEJIANG LVJIAYI INTELLIGENT SUSPENSION CO LTD
Air spring shock absorber with adjustable rigidity and height
The utility model discloses an air spring shock absorber with adjustable rigidity and height, which comprises a connecting fork arm, an oil storage cylinder connected with the end part of the connecting fork arm, a U-shaped seat arranged on the outer wall of the oil storage cylinder, an oil cylinder base arranged at the end part of the oil storage cylinder, a guider arranged on the inner side of the bottom of the oil storage cylinder, and a working cylinder arranged on the inner side of the oil storage cylinder, a piston rod is arranged on the inner side of the working cylinder in a sliding mode, the piston rod is in sliding fit with the working cylinder through a first piston, the piston rod penetrates through the guider and is in sliding fit with the guider, an end is arranged on the outer side of the lower portion of the piston rod, and a cushion pad is arranged at the lower end of the end and on the outer side of the piston rod. A second O-shaped ring is arranged between the cushion pad and the piston rod, a plane bearing is arranged on the outer side of the cushion pad, a mounting plate is arranged on the outer side of the plane bearing, and the functions that the damping effect is improved, the weight is light, and the elastic rigidity and the height are adjustable are achieved.
Owner:LINYI TIANYI ELECTRONICS CO LTD
Adjustable stiffness flexible drive mechanism and method of use
The present application relates to the technical field of precision machining, and provides a flexible driving mechanism with adjustable rigidity and a use method, which has one or more driving units, the driving unit comprises a flexible wire body and one or two functional bodies, one end of the flexible wire body is connected with a functional body or two ends of the flexible wire body are respectively connected with two functional bodies; a workpiece to be machined is provided with a through hole, the flexible wire body penetrates through the through hole, the end of the flexible wire body can be twisted and wound under the driving of the functional body, so that the flexible wire body is changed in diameter, and under the driving of the functional body, the flexible wire body can have displacement in the axial direction, wherein the workpiece to be machined is synchronously moved with the flexible wire body or relatively moved with the flexible wire body. The flexible driving mechanism in the present application can realize flexible and smooth machining of a hole wall, solves the problem of precision and smooth machining of a complex hole wall, and has simple driving structure, convenient operation and low equipment cost.
Owner:NANJING LINGJI YIDONG DRIVING TECH CO LTD
Adjustable surface stiffness treadmill
PendingUS20260091261A1Movement coordination devicesCardiovascular exercising devicesPhysical medicine and rehabilitationAdjustable stiffness
A treadmill with adjustable vertical surface stiffness is disclosed. The treadmill is used to study gait adaptation and develop interventions for gait rehabilitation for conditions such as stroke. The surface stiffness is set by controlling the length of a cantilever beam which acts as an adjustable stiffness spring suspension underneath the treadmill. The treadmill also contains an additional novel mechanism to reduce the amount by which it is allowed to sag under its own weight as the stiffness decreases.
Owner:UNIV OF MASSACHUSETTS
Shock absorption suspension with adjustable shock absorption hardness for motor home
The utility model discloses a shock-absorbing suspension with adjustable shock-absorbing hardness for a motor home, and particularly relates to the technical field of automobile shock-absorbing suspensions, the shock-absorbing suspension comprises a mounting seat, a bearing beam is arranged below the mounting seat, the bottom of the bearing beam is fixedly connected with a mounting frame, an adjusting assembly is arranged below the mounting seat, a replacing assembly is arranged above the bearing beam, and the replacing assembly is fixedly connected with the mounting frame. The adjusting assembly comprises two connecting plates. According to the shock-absorbing and hardness-adjustable shock-absorbing suspension for the motor home, the adjusting assembly is arranged, specifically, the two rotating blocks are rotated clockwise to drive the rotating blocks to rotate on the outer surfaces of the corresponding round rods, and the shock-absorbing hardness of the device can be adjusted by changing the extrusion degree of the springs in the normal state; according to the motor home, the small shaking of a vehicle body can be reduced when the motor home runs, a driver and passengers can feel more stable and comfortable, and the overall service life of the motor home can be prolonged according to the actual road condition and the running state through the adjustable shock absorption suspension with the shock absorption hardness.
Owner:JIANGSU CHUANGTE SPECIAL VEHICLE TECHNOLOGY RESEARCH INSTITUTE CO LTD
A porous structure having a wide range of adjustable stiffness in situ
This application relates to the field of variable stiffness structural design, providing a porous structure with a wide range of in-situ adjustable stiffness, including a pressure-bearing component and a supporting component. The pressure-bearing component has symmetrical elastic ribs on both sides of its transverse direction, with at least two openwork structures on each side of the elastic rib. The supporting component includes a prismatic member that slides between the elastic ribs on both sides when nested. The ratio of the inner and outer diameters of the pressure-bearing component is defined as α = d / D, and the ratio of the height of the prismatic member to the pressure-bearing component is defined as β = h / H, where both α and β are positively correlated with the structural stiffness. The supporting component slides with the pressure-bearing component, and stiffness adjustment is achieved by changing the overlap area between the prismatic member and the elastic ribs through longitudinal adjustment of the supporting component's position. This structure achieves the beneficial effects of simple structure, wide stiffness control range, and multi-dimensional adjustability through the coordinated cooperation of dimensional ratio parameters and the adjustment of the supporting component's position.
Owner:HUAQIAO UNIVERSITY
Active-passive rigidity-adjustable heave compensation system based on underwater electro-hydraulic actuator
ActiveCN121206042AFluid-pressure actuator safetyFluid-pressure actuator testingMarine engineeringAdjustable stiffness
The invention discloses an active and passive rigidity-adjustable heave compensation system based on an underwater electro-hydraulic actuator. The system comprises a motion sensing control system, a passive compensation hydraulic module, an electro-hydraulic actuator active compensation hydraulic module, an electro-hydraulic actuator rigidity adjusting module and a sensor module. According to the invention, the passive compensation hydraulic module absorbs and releases energy under low-frequency / large-amplitude heaving to maintain the stability of a load, the electro-hydraulic actuator active compensation hydraulic module corrects the residual displacement after passive chain compensation in real time, and the electro-hydraulic actuator rigidity adjusting module sets the compensation rigidity before operation or at an interval, so that the stability of the load is ensured. And the system can obtain better dynamic performance and energy efficiency under different sea conditions.
Owner:ZHEJIANG UNIV
Prestressed cable reinforced one-way sliding structure with adjustable rigidity and energy dissipation effect
The invention discloses a prestressed cable reinforced one-way sliding structure with adjustable rigidity and an energy dissipation effect. The structure consists of N (N is greater than or equal to 2) rigid columnar units which are annularly and uniformly distributed and a continuous rope. The adjacent columnar units are connected through prism pairs only allowing axial one-way sliding. One end of the rope is fixed to the upper node of any starting unit, and the other end of the rope sequentially penetrates through the upper nodes of the other units in the clockwise direction and is finally fixed to the lower node of the starting unit. And at each node in the middle, the rope can slide relative to the node. By applying pretension to the ropes, the structure can achieve a stable geometric self-balancing state, the overall axial compression rigidity is mainly provided by the pretension of the ropes, and the rigidity can be dynamically adjusted by adjusting the pretension of a single rope under the condition that the geometric shape of the structure is not changed. Under the action of an axial load, the deformation of the structure is mainly caused by sliding friction between the rope and the node, and a good energy dissipation effect is achieved.
Owner:BEIJING UNIV OF TECH