42results about "Friction dampers" patented technology

A power wheelchair includes a frame, a powertrain including a motor, gearbox, and powertrain suspension coupled to a drive wheel. The powertrain suspension includes a powertrain mount connected to the motor. The mount is pivotally connected to and resiliently supported by an upper link and a lower link for movement of the drive wheel relative to the frame. The power wheelchair further includes a base suspension connected between the frame and the caster support arms. The base suspension is dynamically controllable to vary caster suspension movements in response to sensor outputs to reduce pitching motions.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

This invention relates to a kind of displacement amplification self-centering friction damper. The device uses gears to convert the axial deformation into the rotation of the friction-disc, and the friction device engages in friction at the edge of the friction-disc, then the displacement can be amplified and therefore it can reduce the frictional force and prolong the service life of friction components. At the same time, through gear transmission, the friction force provided by the friction device can increase with the increase of relative displacement, then it can provide suitable energy dissipation capability under different working conditions. Additionally, the device can automatically return to its initial state by disc-spring, and also provides self-centering capability for the structure simultaneously, advantageous in reducing residual deformation of the structure under severe earthquake. Compared with existing technologies, this invention has a better energy dissipation effect and is suitable for vibration control in engineering structures.

The application belongs to the technical field of structural vibration control devices, and discloses a high-stability multidirectional vibration isolator. The vibration isolator comprises horizontally arranged upper and lower steel plates, a spiral spring fixed between the upper and lower steel plates, a threaded sleeve and a viscoelastic damping block. The threaded sleeve is rigidly connected to the upper and lower steel plates and located outside the spiral spring. The viscoelastic damping block is arranged in the spiral spring and fixed below the upper steel plate and above the lower steel plate. The viscoelastic damping block is a curved surface. The application improves the vertical vibration isolation effect and displacement control capacity of the spring vibration isolator, makes up for the horizontal vibration isolation defects caused by the insufficient lateral stability of the spring vibration isolator, increases the application scenarios of the spring vibration isolator, and does not excessively increase the implementation complexity, thereby facilitating application.

The invention relates to a damping device (1) for an assembly (3) suspended in a motor vehicle (2), comprising at least the following components: - at least one modulating element (4,5) with at least two support tracks (6,7); - a bearing side (8) which can be fixed relative to a frame (9) and which has at least one bearing-side counter-support surface (10); - an aggregate side (11) which can be fixed relative to an aggregate (3) and which has at least one aggregate-side counter-support track (12); - at least two roles (13,14); and - an energy storage device (15) for exerting a preload force (16), wherein complementary track pairs (18) are formed by the counter-support tracks (12) with each other of the support tracks (7), wherein the rollers (13,14) are mounted to roll in the track pairs (17,18), the track pairs (17,18) are arranged such that a displacement between the aggregate side (11) relative to the bearing side (8) is translated into a displacement of at least one of the rollers (13,14) in its track pair (17,18) and thus, by means of the modulating element (4,5), into a changed preload force (16) of the energy storage device (15). The damper device (1) is characterized in particular by the fact that it further includes a friction device (19) and at least one friction partner (22,23) which is carried along with at least one of the modulating elements (4,5). The damping device is particularly durable and has very good damping properties.

This delivery robot may comprise: a lower plate configured to be fixed to the delivery robot; an upper plate configured to support items placed thereon; a damper spring fixed to the lower plate; and an adjusting plate coupled to an end of the damper spring and configured to adjust the damping of the damper spring. The adjusting plate is formed as an inclined surface, and thus the distance between the center of the damper spring and the adjusting plate can be made different at a center point and an end point. The upper plate can move at a different inclination angle relative to the lower plate according to the distance between the center of the damper spring and the adjusting plate.

The invention relates to a workpiece table (1) for a machine tool, comprising a base support (11) having a machine interface (15, 16) designed for coupling with a machine frame of a machine tool, and having a support receptacle (19) for coupling with a workpiece carrier (51), and a workpiece carrier (51) comprising a support body (52), an auxiliary mass (53) and a pull piece (54), wherein the support body (52) is provided on a top surface (71) with a workpiece receptacle (56) for clamping a workpiece and on a bottom surface has a coupling section (59) for coupling with the support receptacle (19), wherein the auxiliary mass (53) is mounted linearly movable on a contact surface (61) of the support body (52) and wherein the pull piece (54) is designed for normal force transmission between the support body (52) and the auxiliary mass (53), wherein the auxiliary mass (53) has a variable-size contact area (62;74) with the contact surface (61) such that the auxiliary mass (53) and the contact surface (61) form an auxiliary mass damper with adjustable damping effect.;

A shock absorber includes a cylinder and a movable piston rod inserted into the cylinder to be movable to generate a damping force and having one end which extends to the outside of the cylinder. A seal member is fixed to the cylinder to be in sliding contact with the piston rod, and a friction member generates a frictional force with respect to relative movement between the cylinder and the piston rod. The friction member includes first and second friction parts, respectively fixed to one of the cylinder and the piston rod to be in sliding contact with the other of the cylinder and the piston rod. The second friction part is configured to start to slide with respect to relative movement of the cylinder and the piston rod at a timing different from that of the first friction part and generate an adjustable frictional force.

The invention relates to a friction shock absorber for washing machines, consisting of a shell and a piston that slides within it, both equipped with connecting rings for attachment to the drum and frame. Inside the shell, a cap and a friction ring are provided, the latter being housed within an internally knurled ring. The knurled inner surface of this ring prevents the friction ring from sliding axially, while its outer surface features uniformly distributed projections that slide along the inner wall of the shell to ensure proper centering of the piston during movement. The friction ring extends axially beyond both sides of the knurled ring and is made of a softer plastic material, allowing the knurling to penetrate it. The shell and the cap respectively include inclined stop surfaces, which ensure progressive engagement when axial movement exceeds the free stroke.

To make proper damping force function according to a relative displacement.SOLUTION: Three-dimensional fabrics 31,32 are provided in one of a first member 10 and a second member 20 provided relatively movably so that a clearance C between itself and the other in a direction orthogonal to a movement direction partially varies along the movement direction. Therefore, by a relative position of the first member 10 and the second member 20, a compression amount of the three-dimensional fabrics 31,32 by compression members 51,52 is varied, and accordingly, sliding resistance force applied to both of them varies. Thus, by adjustment of the clearance C between the three-dimensional fabrics 31,32 and the first member 10 or the second member 20, damping force generated when the first member 10 and the second member 20 relatively move can be set to various characteristics.SELECTED DRAWING: Figure 1

The application discloses a self-tuning vibration absorption device and belongs to the technical field of heavy forging and pressing equipment. The device comprises a base, a central supporting shaft, a main counterweight and a secondary sliding mass. The base is used for connecting a device to be absorbed. The base is provided with the central supporting shaft. The base and the central supporting shaft vibrate with the vibration of the device to be absorbed. The main counterweight is rotationally connected to the central supporting shaft. The main counterweight is provided with a guide rail. The secondary sliding mass linearly slides on the guide rail. The mass center sliding track of the secondary sliding mass is on a first straight line. The first straight line is perpendicular to the axis of the central supporting shaft. The first straight line, the axis of the central supporting shaft and the mass center of the main counterweight are located on a first plane. The application can absorb energy through the deflection of the main counterweight. The secondary sliding mass on the main counterweight is radially moved outward by centrifugal force, thereby gradually reducing the natural frequency of the deflection energy absorption component, so as to ensure the vibration absorption effect.

An apparatus is provided. The apparatus includes an equipment support structure configured to support a semiconductor fabrication component. The apparatus includes a damper assembly configured to resist a lateral force induced by a seismic event to the equipment support structure. The damper assembly includes a gear rack coupled to the equipment support structure. The damper assembly includes a first flywheel assembly including a first mass damper flywheel and a first gear meshed with the gear rack and selectively engaged with the first mass damper flywheel.

This utility model relates to the field of engineering vibration reduction technology, specifically a full-frequency vibration damping control device based on metamaterial particle vibration reduction and noise reduction. It includes several symmetrically distributed dynamic vibration absorption modules, each consisting of a mass unit and elastic bodies covering the mass unit, forming a linear vibration absorption unit that absorbs low frequencies. The particle damping module is filled with discrete particles of different sizes. The dynamic vibration absorption module and the particle damping module are integrated and stacked within a main housing. This utility model overcomes the deficiency of insufficient low-frequency excitation in traditional particle dampers by using the dynamic vibration absorption module to target and absorb vibration energy in the target low-frequency range through the anti-resonance principle of the mass-elastic body. In the high-frequency range, the particle damping module takes the lead. The integrated and collaborative operation of the dynamic vibration absorption module and the particle damping module achieves a seamless full-frequency vibration suppression effect from low to high frequencies.

A piston-cylinder unit (1) comprises a tubular housing (2) which is unpressurized and has a central longitudinal axis (3), a closed end end (4) and an open end end (5), a piston rod (7) displaceable along the central longitudinal axis (3) which extends out of the housing (2) at a first end (8) at the open end end (5), a fastening element (6, 9) arranged at the closed end end (4) and at the first end (8) of the piston rod (7), a spring element (15) arranged in the housing (2) for applying an extension force to the piston rod (7), and a guide element (17) axially held on the housing (2) for guiding the piston rod (7) along the central longitudinal axis (3).a damping element (20) for damping the axial displacement of the piston rod (7) and an insertable axial stop element (21) for preventing the fastening element (9) arranged on the piston rod (7) from striking the housing (2).

The application relates to an interlocking friction energy consumption anti-impact structure based on a bionic hexagon structure and belongs to the field of anti-impact protective equipment. The application mainly comprises a hexagon thin-wall structure and an elliptical interlocking structure. The hexagon thin-wall structure is determined based on bionic design of a beetle ala cross section; the elliptical interlocking structure is a bionic interlocking unit with a convex and a concave elliptical arc matched with each other, is designed based on the elliptical interlocking interface characteristics of a cassida beetle ala, and is tangent at the connecting parts of the convex and the concave; the elliptical interlocking structure is distributed at the point positions of the hexagon thin-wall structure and is determined through strain analysis of the hexagon thin-wall structure. The interlocking interface friction energy consumption mechanism of the beetle ala and the compression resistance characteristics of the hexagon structure are combined, the hexagon thin-wall structure and the elliptical interlocking structure are cooperatively acted, the interlocking interface friction energy consumption, layered sliding and structural deformation are realized when impact is borne, hierarchical energy consumption is realized, and a composite protection system with high anti-impact performance is formed.

Embodiments relate to dynamic stroking seats for vertical take-off and landing (VTOL) aircraft. Seat ballast tanks are attached to aircraft seats. The seats are sprung by a fixed or variable load energy absorption system. The weight of a user is determined and assigned to a corresponding seat of the user. Based on the weight of the user, the fluid level in the ballast tank is monitored and adjusted to achieve a target weight range.

Device (10) with (a) a vibrating component (20) and (b) a particle damper (30) comprising a base body (32) with a cavity (34) which is at least partially filled with particles (52), (c) wherein the particle damper (30) comprises an acoustic black hole element, ASL element, (40), (i) comprising at least one ASL section (42) in which the thickness of the ASL element (40) in a plane of vibration decreases substantially according to a power function or substantially according to an exponential function from an inlet end (44) of the ASL section (42) to a tapered end (46) of the ASL section (42) in a plane of vibration from an inlet end (44) of the ASL section (42) (ii) wherein the ASL section (42) interacts with the particles (52), (iii) wherein at least part of the ASL element (40) forms at least part of the boundary of the cavity (34) of the particle damper (30) and / or extends at least partially into the cavity (34) of the particle damper (30).

This invention relates to the field of vibration suppression technology and discloses a particle damper with power generation function, comprising: a container with an internal cavity; one or more longitudinal partitions disposed within the cavity, dividing the cavity into multiple sub-cavities, each sub-cavity having a conductive electrode assembly on its bottom surface, the conductive electrode assembly including a first electrode and a second electrode, the first and second electrode being spaced apart; and one or more transverse partitions disposed within the cavity, the transverse partitions intersecting the longitudinal partitions, the transverse partitions dividing each sub-cavity into multiple grid spaces, each grid space containing multiple damping particles placed on the conductive electrode assembly; when the container vibrates, the relative motion between the damping particles and the corresponding conductive electrode assembly generates an electric current. This invention can effectively suppress the vibration of the main structure at different vibration frequencies and can also collect and utilize dissipated vibration energy.

The invention relates to a magnetorheological brake (1), comprising a rotor (3) which is provided such that it can rotate about an axis (18), a mechanical interface (6) which is provided such that it can rotate about the axis (18), and a damping device (20) with a pair of sliding surfaces, wherein the damping device (20) has a damping element (20.1), which forms a surface of the pair of sliding surfaces, wherein the rotor (3) is designed to receive a braking effect, and the damping device (20) is designed to damp the braking effect before transmission to the mechanical interface (6). The invention also relates to a force feedback actuator (50), a steering device (100), and a damping element (20.1).

The invention relates to a vibration adjusting part and a vibration adjusting device. The vibration adjusting part comprises a body, wherein a cavity is defined in the body; the vibration adjusting material is contained in the cavity, and the vibration adjusting material comprises a plurality of particles with set attributes; the body and the particles are formed by an additive manufacturing process and from an additive manufacturing material. According to the vibration adjusting part, the cavity and the particles are formed through the additive manufacturing process, the complex cavity structure and particle attributes which cannot be achieved through a traditional machining method can be achieved, the vibration adjusting effect can be improved, an opening used for externally adding particles or powder does not need to be formed in the cavity, the sealing procedure of related technologies is avoided, and the production efficiency is improved. The manufacturing efficiency of the vibration adjusting part can be improved.

The application relates to a damping support and a vehicle. The damping support comprises a support assembly and a plurality of damping particles. The support assembly comprises a connecting arm provided with a damping cavity and a damping piece, the damping cavity is divided into adjacent first and second sub-cavities by a partition plate provided with a communication hole, and is filled with the damping particles, and the communication hole is provided with a chamfered curved surface part with a gradually decreasing cross-sectional size from outside to inside. The vibration energy is converted into kinetic energy consumption through the damping piece and the collision and friction of the damping particles, and efficient damping is realized. Meanwhile, the structure of the partition plate and the communication hole limits the large-scale movement of the particles, and avoids the secondary vibration caused by the large displacement of the center of mass. In addition, the chamfered curved surface part not only plays a guiding role, but also uses its geometric shape to induce destructive interference of sound waves, thereby further attenuating noise on the basis of mechanical damping. This makes the damping support play an excellent damping and noise reduction role in a wide frequency range between the vibration element and the mounting carrier.

The application discloses a quasi-zero stiffness vibration isolator with pre-pressing adjustment, and belongs to the technical field of mechanical vibration control. In view of the defects of the existing vibration isolation device, such as poor low-frequency vibration isolation effect, insufficient flexibility of stiffness adjustment, single damping characteristic, insufficient operation reliability and the like, the application adopts a main bearing mechanism to cooperate with umbrella-shaped auxiliary spring units arranged in a circumferential symmetry to construct a quasi-zero stiffness system, integrates a pre-pressing adjustment mechanism to realize multi-stage accurate adjustment of stiffness, and is matched with multiple damping energy dissipation components to strengthen vibration attenuation capacity. The application can significantly improve low-frequency vibration isolation performance, widen the working condition adaptation range, greatly improve vibration energy dissipation efficiency, and at the same time, has high structural modularization degree, is convenient for processing, assembly and maintenance, has low manufacturing cost, and can be widely applied to micro-vibration control scenes of various high-end precision equipment.

The application relates to the technical field of bamboo materials, and discloses modified bamboo materials, a preparation method and application thereof, the preparation method of the modified bamboo material comprises the following steps: (1) mixing tetraethyl orthosilicate, a silane coupling agent and anhydrous ethanol, and then adjusting to acidity to obtain a silicon precursor solution; (2) immersing bamboo materials in the silicon precursor solution, and then taking out and drying to obtain mineralized bamboo materials; and (3) carrying out densification treatment on the mineralized bamboo materials to obtain modified bamboo materials. The bamboo materials are subjected to mineralization and densification treatment to improve the rigidity and density of the bamboo materials, reduce vibration response, effectively inhibit vibration, and when the bamboo materials are applied to musical instruments, sound box equipment and the like, sound transmission loss can be more effectively reduced, and acoustic stability can be improved.

The application is a hydraulic friction damper, which comprises a cylindrical outer cavity shell, a plurality of pairs of cavities are arranged on the inner wall of the outer cavity shell at both ends of the outer cavity shell, a piston is arranged between each pair of cavities, the piston penetrates into the corresponding cavity at both ends, an arc-shaped partition plate is arranged in the cavity and divides the cavity into a first hydraulic chamber and a second hydraulic chamber, a plurality of communication pipes for connecting the first hydraulic chamber and the second hydraulic chamber are arranged on the outer wall of the outer cavity shell, a hydraulic valve is arranged on the communication pipe, an inner telescopic sleeve is connected to both ends of the piston, an outer telescopic sleeve is arranged on the outer side of the inner telescopic sleeve, a spring is connected between the inner telescopic sleeve and the outer telescopic sleeve, a through hole is arranged in the center of the arc-shaped partition plate, and an arc-shaped plug head matched with the arc-shaped partition plate is connected to the outer telescopic sleeve after penetrating out of the through hole. Compared with the traditional friction damper, the application has stronger energy consumption capacity, the friction force can be increased with the increase of the relative displacement of the pull rod, and the pressure reset can be realized by adjusting the hydraulic valve.

Shock absorbers (11, 11A), comprising: a cylinder (12) filled with a working fluid, an outer tube (14) which is provided on an outer circumferential side of the cylinder (12), a reservoir chamber (13) which is formed between the outer tube (14) and the cylinder (12), a piston (18) which comes into sliding contact with a surface side of the cylinder (12) and divides the inside of this cylinder (12) into a one-side chamber (16) and an opposite-side chamber (17), a piston rod (15) to which the piston (18) is fixed at one end and an opposite end extends from the cylinder (12), a sealing component (21) that comes into sliding contact with the piston rod (15) and prevents the working fluid from leaking out of the cylinder (12), a rod guide (20) which is provided at a position on a side defined by the sealing component (21) of the cylinder (12) and guides the piston rod (15), a friction generating component (22, 22A) which is provided at a position on a side defined by the sealing component (21) of the cylinder (12) and comes into sliding contact with the piston rod (15), an oil storage chamber (85A) which is connected to the reservoir chamber (13), an inner chamber (261) which is connected to the oil storage chamber (85A) and the reservoir chamber (13), and a chamber (151A) which is connected to the inner chamber (261), wherein the friction generating component (22, 22A) has an annular elastic rubber area (91, 91A) which comes into contact with the piston rod (15), and a base area (92, 92A) to which this elastic rubber area (91, 91A) is firmly attached, characterized by the fact that the elastic rubber area (91, 91A) is formed such that the elastic rubber area (91, 91A) is located away from an outer circumferential surface of the piston rod (15) and that an upstream side and a downstream side of the elastic rubber area (91, 91A) are able to communicate with each other when a differential pressure between the single-sided chamber (16), the chamber (151A) of the cylinder (12), the inner chamber (261), the oil storage chamber (85A) and the reservoir chamber (13) decreases and the differential pressure reaches a predetermined pressure, wherein a cross-sectional area of ​​a communication path (152, 252) formed in the base region (92, 92A) is smaller than a cross-sectional area of ​​a communication path (64) between the piston rod (15) and the rod guide (20), and wherein the upstream side and the downstream side communicate with each other via the communication path (64) between the piston rod (15) and the rod guide (20), and the communication path (152, 252) formed in the base area (92, 92A).