13results about How to "Improve static stiffness" patented technology

The vibration isolation device comprises a top plate and a bottom plate, a first upper connecting rod and a second upper connecting rod are hinged to the lower side of the top plate through first cylindrical pins, and a first lower connecting rod and a second lower connecting rod are hinged to the upper side of the bottom plate through second cylindrical pins. The first lower connecting rod is hinged to the first upper connecting rod through a third cylindrical pin, the second lower connecting rod is hinged to the second upper connecting rod through a third cylindrical pin, the nonlinear vibration isolation effect of high static rigidity and low dynamic rigidity can be achieved, positive rigidity is provided by the torsion spring, negative rigidity is provided by the spiral spring, and vibration isolation is achieved. The spiral spring obtains pre-tightening force by rotating the force adjusting piece, and vertical adjustment in the platform period is achieved.

The vibration isolator comprises a top plate, a main air chamber and a base, the main air chamber is installed in the middle of the top of the base, a first piston is installed in the main air chamber, a first swing rod is vertically installed in the first piston, arc-shaped air chambers are installed on the periphery of the main air chamber, and a second swing rod is vertically installed in the first swing rod. A second piston is installed in the arc-shaped air chamber, a second swing rod is vertically installed in the second piston, an air spring is connected to the bottom of the arc-shaped air chamber, a supporting plate is further installed between the air spring and the arc-shaped air chamber, first transverse air chambers are vertically installed on the periphery of the main air chamber, and third pistons are installed in the first transverse air chambers. The third piston is vertically connected with a first guide rod, a rolling wheel is installed on the top of the first guide rod, and the rolling wheel is in rolling connection with the arc-shaped air chamber. The device is high in positioning precision, has the bearing capacity and rigidity adjusting capacity, can adapt to precise instruments of different models, and is wide in application range and high in universality.

The utility model relates to the technical field of air conditioners, in particular to a silencer and an air conditioner, the silencer comprises a silencing body, a silencing pipe and a connecting assembly, the silencing body is provided with a silencing cavity, one end of the silencing pipe is connected with one end of the silencing body, and at least part of one end of the silencing pipe extends into the silencing cavity; the connecting assembly comprises a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is connected with the other end of the silencing pipe, the other end of the first connecting pipe is suitable for being connected with an exhaust port of the compressor so as to communicate the silencing pipe with the exhaust port of the compressor, and one end of the second connecting pipe is directly connected with the other end of the silencing body. And the other end of the second connecting pipe is suitable for being connected with an indoor side heat exchanger so as to communicate the silencing cavity with the indoor side heat exchanger, the silencer can adapt to a narrow space in a compressor cavity, and the reliability of the connecting pipes is improved.

The invention discloses an intelligent self-powered variable-inerter tuned mass damper, and relates to the field of structural vibration control. According to the invention, effective control of multi-mode vortex-induced vibration of a long-span bridge is realized, dependence of a semi-active TMDI on a power supply system is avoided, and installation convenience is improved. The variable inerter is introduced into the conventional TMD commonly used for vortex vibration control to form the TMDI, so that the TMDI has the characteristics of high static rigidity and low dynamic rigidity. And frequency adjustment and damping adjustment of the TMDI are respectively realized through the variable inerter and the direct current motor system. The large-span bridge multi-order modal vortex vibration control system can effectively control large-span bridge multi-order modal vortex vibration, meanwhile, the self-powered system of the large-span bridge multi-order modal vortex vibration control system can provide power for the control system, and remarkable installation convenience is achieved.

The invention provides a negative stiffness adjustable vertical vibration isolation device based on quasi-zero stiffness characteristics, and relates to the technical field of vibration isolation devices. Comprising a bottom plate, a positive stiffness unit and a negative stiffness unit, and the positive stiffness unit comprises a positive stiffness spring and a positive stiffness spring cover plate; the negative stiffness unit comprises a first pressed spring piece, a second pressed spring piece, a third pressed spring piece and a fourth pressed spring piece; a first center plate is arranged between the first pressed spring piece and the second pressed spring piece; a second center plate is arranged between the third pressed spring piece and the fourth pressed spring piece; the first pressed spring piece, the second pressed spring piece, the third pressed spring piece, the fourth pressed spring piece, the first center plate, the second center plate and the positive stiffness spring cover plate are stacked in the vertical direction. Vibration transmission between an object and the base can be effectively reduced, the size of the device is reduced, the vibration isolation performance is not affected, compact design is achieved, and the requirements of some special vibration reduction systems are met.

This disclosure relates to a rear subframe and a vehicle. The rear subframe includes longitudinal beams, a rear crossbeam, and a rear stabilizer bar bracket. The rear crossbeam is connected to the longitudinal beams. The rear stabilizer bar bracket is connected to both the longitudinal beams and the rear crossbeam, forming a cavity together with the longitudinal beams and the rear crossbeam. The rear stabilizer bar bracket is an integrally molded structural component, suitable for mounting a rear stabilizer bar. Through the above technical solution, the rear subframe provided by this disclosure can provide more reliable support for the rear stabilizer bar bracket, helping to improve the static stiffness, strength, and durability of the rear stabilizer bar bracket. Furthermore, connecting the rear stabilizer bar bracket to both the longitudinal beams and the rear crossbeam enhances the connection reliability between the longitudinal beams and the rear crossbeam, enabling the rear subframe to better withstand various impact loads and vibrations generated during vehicle operation. This ensures that the overall structure of the rear subframe has high structural strength and durability, contributing to improved overall vehicle performance.

The present invention provides a variable stiffness three-degree-of-freedom quasi-zero stiffness vibration isolator, comprising a top plate, an outer shell, an air spring and an additional air chamber, wherein an air spring is connected to the middle of the top of the additional air chamber, a swing rod is installed on the top of the air spring, the top of the swing rod is vertically connected to the middle of the bottom of the top plate, a support plate A is installed between the additional air chamber and the air spring, an iron pipe A is sleeved on the top of the support plate A and the periphery of the air spring, a coil A is wound around the outside of the iron pipe A, a permanent magnet A is installed above the iron pipe A and the lower part of the swing rod, a support plate A is installed on the top of the permanent magnet A and the swing rod, a support plate B is installed above the support plate A and the inner side of the outer shell, an iron pipe B is sleeved on the top of the support plate B and the periphery of the swing rod, a coil B is wound around the outside of the iron pipe B, and a permanent magnet B is installed above the iron pipe B and on the swing rod. The present invention has the ability to adjust the bearing capacity and stiffness, a wide vibration isolation band, a wide range of application, and strong versatility.

The utility model provides a mounting support and a vehicle, the mounting support is used for mounting a central control display screen of the vehicle on a main cross beam of an instrument panel, and comprises a first plate body, a second plate body and a third plate body, the first plate body is used for being connected with the central control display screen, and the second plate body is used for being connected with the central control display screen; the second plate body and the third plate body are used for being connected with an instrument board main cross beam, and weakening parts are arranged on the first plate body and the connecting portion of the first plate body and the second plate body. The installation support is integrally formed, simple in structure, convenient to machine and capable of improving stability and reliability of fixation of the central control display screen, so that static rigidity and modality of the installation support are guaranteed, NVH performance is effectively improved, the arranged weakening portion can deform due to the fact that the central control display screen is subjected to external impact force, and therefore the central control display screen is prevented from being damaged. Therefore, the safety of passengers in the automobile is ensured.

The utility model relates to the technical field of unmanned plane, concretely provides unmanned plane vibration suppression method and structure based on local area resonance metamaterial, including main body arch frame and shallow arch curved beam, the curved inside of shallow arch curved beam with the curved inside of main body arch frame opposite setting, the both ends of shallow arch curved beam with the curved inside of main body arch frame fixed connection and form the quasi zero stiffness single oscillator with integrated structure, the end face of main body arch frame both ends is in the same plane, the position of end face of main body arch frame both ends close to the center still is provided with screw hole, through setting up curved beam combination oscillator with shallow arch curved beam, solved the problem that unmanned plane traditional oscillator is difficult to realize low inherent frequency vibration isolation and poor spatial adaptability.

This invention discloses a geometrically nonlinear, high-load, high-isolation and vibration-damping robot wheel-leg mechanism, including a thigh, a lower leg, a wheel, a crank, a connecting rod, an elastic device, a damping device, a first joint motor, and a second joint motor. The first and second joint motors are located inside a housing. The first joint motor is connected to the upper end of the robot's thigh and drives its rotation. The lower leg is rotatably connected to the lower end of the thigh, and the wheel is connected to the lower end of the lower leg. The upper end of the crank is connected to the second joint motor, and the lower end of the crank is rotatably connected to the upper end of the connecting rod. The lower end of the connecting rod is rotatably connected to the upper end of the lower leg. The damping device and the elastic device connect the lower leg and the connecting rod to achieve vibration isolation and reduction. This invention improves the robot's vibration isolation and reduction performance when traversing bumpy roads or walking on legs, making the robot body more stable and reducing the impact on the motors.

The application discloses a magnetic nonlinear stiffness large-damping high-isolation and damping robot wheel-leg mechanism, which comprises a thigh, a shank, a wheel, a crank rod, a connecting rod, a magnetic device one, a magnetic device two, a damping device, a first joint motor and a second joint motor. The first joint motor and the second joint motor are located in a box body, the first joint motor is connected with the upper end of the thigh of the robot and drives the rotation of the thigh, the shank connecting point is rotationally connected with the lower end of the thigh, and the wheel is connected with the lower end of the shank. The upper end of the crank rod of the crank rod is connected with the second joint motor, the lower end of the crank rod is rotationally connected with the upper end of the connecting rod of the connecting rod, and the lower end of the connecting rod is rotationally connected with the upper end of the shank. The damping device, the magnetic device one and the magnetic device two are connected with the shank and the connecting rod respectively, and isolation and damping are realized. When the robot passes through a bumpy road surface or walks in a foot mode, the isolation and damping performance of the robot is improved, the fuselage is more stable, and the impact on the motor is reduced.

The utility model discloses a stabilizer bar bushing based on a special-shaped framework, which comprises a first rubber sleeve and a second rubber sleeve arranged side by side with the first rubber sleeve, and a hole channel for a stabilizer bar to pass through is formed between the first rubber sleeve and the second rubber sleeve; the at least two honeycomb framework bodies are respectively arranged on the inner sides of the first rubber sleeve and the second rubber sleeve; the honeycomb rib part is integrally formed on the outer surface of the honeycomb framework body; through the honeycomb framework body and the honeycomb rib part, the contact area with an external stabilizer bar and an external clamp is conveniently increased, local large stress concentration is reduced, the rigidity requirement is met, and compared with a conventional stabilizer bar bushing, under the same performance requirement, the bushing has the smaller size through the unique special-shaped honeycomb framework design, and the service life of the bushing is prolonged. The plastic stabilizer bar can be conveniently applied and installed on stabilizer bars of various vehicle types in small spaces, the strength of the plastic can be effectively enhanced through the framework of the honeycomb structure, the static rigidity in the main direction is improved, and the torsional rigidity is reduced.

The application relates to the technical field of ultra-precision machining equipment, in particular to a gas bearing assembly and a gas-floating motorized spindle with the same, which comprises an outer shell and a radial gas bearing arranged in the outer shell, a ring-shaped air inlet groove is arranged on the inner wall of the outer shell and corresponds to the position of the radial gas bearing, a closed air inlet cavity is formed between the ring-shaped air inlet groove and the outer cylindrical surface of the radial gas bearing, a plurality of air inlet holes which are in communication with the air inlet cavity are circumferentially distributed on the outer cylindrical surface of the radial gas bearing, a throttling hole which is in communication with the air inlet hole is arranged on the inner cylindrical surface of the radial gas bearing, and a composite pressure equalizing structure which is in communication with the throttling hole; the composite pressure equalizing structure comprises at least one circumferential pressure equalizing groove and at least one axial pressure equalizing groove, and the circumferential pressure equalizing groove is a discontinuous structure which is discontinuous along the circumferential direction. The radial gas bearing is designed as a two-section type and an intermediate air outlet structure, the composite pressure equalizing groove which is combined with the circumferential discontinuous structure and the axial communication structure optimizes the pressure field distribution, suppresses the radial runout of the spindle rotor, and thus the supporting stiffness and the machining precision are improved.