44results about How to "Stable cushioning" patented technology

A landing mechanism-based legged mechanical cushioning device comprises an upper end cover, a direct current lead screw motor, a disc spring, a damping baffle, a force sensor, an expansion ring, a piston push rod, a conical ring push rod, a cushioning cavity housing, a motor lead screw guide ring, a foam metal filling block filler, a flexible porous material, a bottom end cover and a pressure spring; and has two-stage cushioning energy absorption structures. The first stage is a mechanical cushioning structure designed on the basis of thin-wall metal pipe plastic deformation cushioning, and foam metal and flexible porous material plastic deformation energy absorption; and the second stage is an autonomous cushioning energy absorption structure designed on the basis of servo motor feedback control, foam metal plastic deformation energy absorption and elastic element energy storage and release. The inventive cushioning device is a composite cushioning device with simple structure, obvious energy absorption effects and stable performance.

The invention relates to a door hinge with a buffering function. The door hinge is characterized by comprising a shell, a first rotary shaft, a second rotary shaft, a U-shaped rotary shaft, a hinge cup, a linkage part, a torsional spring, a connection part and a damper; the inner wall of the shell is provided with a locating block; the locating block and the shell are matched with each other to form two sliding grooves; the linkage part is provided with a push structure, is arranged in the shell through the first rotary shaft and is connected with the hinge cup through one shaft body of the U-shaped rotary shaft; the connection part is arranged in the shell through the second rotary shaft and is connected with the hinge cup through the other shaft body of the U-shaped rotary shaft; the second rotary shaft is sleeved with the torsional spring; the two ends of the torsional spring are arranged on the U-shaped rotary shaft and the first rotary shaft correspondingly; the damper is provided with an inverted-L-shaped locating sliding block and a stop block; the inverted-L-shaped locating sliding block comprises a transverse sliding block body and a longitudinal locating block body; the transverse sliding block body is inserted in the sliding grooves; the longitudinal locating block body can abuts against the locating block body; and the push structure can push the stop block. The door hinge has the advantages of being compact in structure, convenient to assemble, stable in buffering force, long in service life and convenient to maintain.

The invention discloses a throttling orifice hydraulic buffer. It includes buffer body, inner and outer back springs, throttling wall, supercharge sliding sleeve, buffering contact. The cylindrical surface of the buffering contact and the throttling wall is set two grooves set throttling orifice to block oil moving. The invention has impact velocity automatic adaptability, can keep shock absorbing capacity stable by adapting the variety of the hydraulic oil viscosity under major temperature variety.

The invention discloses a buffer device which comprises a piston cylinder. The piston cylinder comprises a cylinder body (1), a piston (2) arranged in the cylinder body (1) and a piston rod (3) fixed on the piston (2); the piston (2) divides the space in the cylinder body (1) into a rod-free cavity (11) and a rod cavity (2); and within the travel range of the piston rod (3), the rod-free cavity (11) and the rod cavity (12) form a closed loop through a connecting pipeline, and a damping part is arranged on the connecting pipeline. The invention also discloses a boom reward tilting prevention device; the boom (100) is hinged on a support (200); and the reward tilting prevention device comprises the buffer device; and the piston cylinder is installed between the boom (100) and the support (200). According to the buffer device with a closed system, untimely oil absorption can not be caused, components can not be damaged easily, the noise is low, the vibration is small and stable the buffering performance is stable.

The invention relates to a buffering device and an automobile comprising the buffering device. The buffering device comprises a torsion beam assembly, a buffering assembly, a spring and a damper assembly. The spring and the damper assembly are fixed to the torsion beam assembly respectively. The buffering assembly comprises a buffering block and a limiting block, wherein the limiting block is fixed to the spring and located inside the spring, and the buffering block is arranged inside the damper assembly. Further provided is the automobile comprising the buffering device. The buffering device has the advantages that the load borne by the buffering assembly is borne by the buffering block and the limiting block together, stiffness requirements for the buffering block and the limiting block are effectively lowered, cracks caused by fatigue of the buffering block and the limiting block are avoided, the length of the damper assembly and the length of the spring can be reduced, buffering performance is stable, a buffering function and a limiting function can be achieved at the same time, and both the requirement for comfort and the requirement for limiting are well met.

The invention provides a reusable energy absorbing structure for collision preventing of rail vehicles. The structure comprises an impact rod, an outer pipe, a damping structure, a restoring structureand an end base. The damping structure comprises a damping plug, a guide tube, a damping elastic element and an end small base. The restoring structure comprises a restoring piston and a restoring elastic element. The outer tube is of a tubular structure, and the inside of the outer tube is divided into a front cavity and a rear cavity by a partition plate. The partition plate is provided with adamping hole so that the damping fluid can flow between the front and the rear cavities. At least a part of that length of the damping plug is arranged in the damping hole when the damping plug is inthe initial position, and the damping plug can move forward and backward when the damping plug is impinged, a gap is between the thickest part of the radial direction of the damping plug and the damping hole for the damping fluid to flow between the front and rear cavities, and a conductive hole is arranged on the guide tube for the damping fluid to flow in the front and rear cavities. The energy-absorbing structure has good energy-absorbing effect, can reduce the damage to occupants in the secondary collision, and can be reused so as to significantly reduce the cost of the energy-absorbing structure.

The invention relates to a buffering mechanism and an automobile comprising the buffering mechanism. The buffering mechanism comprises a torsion beam assembly, a buffering assembly, a spring and a damper assembly. The spring and the damper assembly are fixed to the torsion beam assembly respectively. The buffering assembly comprises a buffering block and a limiting block, wherein the buffering block is fixed to the spring and located inside the spring, and the limiting block is arranged inside the damper assembly. Further provided is the automobile comprising the buffering mechanism. The buffering mechanism has the advantages that the load borne by the buffering assembly is borne by the buffering block and the limiting block together, stiffness requirements for the buffering block and the limiting block are effectively lowered, cracks caused by fatigue of the buffering block and the limiting block are avoided, the length of the damper assembly and the length of the spring can be reduced, buffering performance is stable, a buffering function and a limiting function can be achieved at the same time, and both the requirement for comfort and the requirement for limiting are well met.

The invention discloses a roadway tunneling blasting drilling automatic positioning device and a using method thereof, and relates to the technical field of rock tunneling, the roadway tunneling blasting drilling automatic positioning device comprises a drilling frame and drilling equipment, a moving frame is arranged on the drilling frame, a device frame is arranged on the front side of the moving frame, and a mounting frame is arranged on the device frame; and the drilling equipment is fixedly mounted on the front side of the mounting frame. The position of blasting drilling is detected and determined through the positioning probe installed on the drilling frame, the position is transmitted to the external control device through the signal receiving and transmitting device, the control device analyzes received signals and then transmits instructions to the driving device on the equipment, and then the position aligned with a drill bit on the drilling equipment is adjusted and determined. The automatic positioning function is achieved, the stabilizing frame of the left-right structure can provide left-right stable buffering force when the drilling equipment works, and therefore when the drilling equipment works, the precision of drilling blast holes is more stably improved, and favorable guarantee is provided for follow-up roadway tunneling and blasting work.

The invention discloses a parallel type self-resetting efficient buffering brake device which comprises a connecting rod and two identical buffering brake mechanisms, wherein the two buffering brake mechanisms are symmetrical; one ends of the two buffering brake mechanisms are connected through the connecting rod; and each of the buffering brake mechanisms comprises a brake outer cylinder, a brakeinner cylinder, an annular sealing element of a brake inner cylinder end cover sealing ring, a first frictional plate, two limiting bolts, a plurality of disk springs and two second frictional plates. The first frictional plate and the two second frictional plates are fastened together through bolts; efficient energy dissipation is realized through metal yield, generation of heat by friction andviscous damping; the brake inner cylinder is embedded in the brake outer cylinder to be filled with liquid, and a liquid flowing hole formed by the interval between the brake inner cylinder and the brake outer cylinder plays a hydraulic brake effect during the braking process; and the disk springs provide resilience for the device through the elastic deformation of the material. The parallel typeself-resetting efficient buffering brake device is used for buffering huge impact load and realizes resetting and has the advantages of being excellent in parallelism, smooth in buffering and counter-recoil, steady in brake force, light in weight, high in buffering performance and large in energy dissipation.

A buffering performance mechanism for an oil needle type buffer comprises a buffer outer barrel, a fork ear shaped support, a joint bearing, a bolt connecting assembly, a plunger piston, a piston, a piston rod, a sealing device, a locking nut and an oil needle rod, wherein the plunger piston is connected to the buffer outer barrel through a spherical surface of the joint bearing, the bolt connecting assembly and the fork ear shaped support; the joint bearing is connected to the fork ear shaped support through the bolt connecting assembly; the fork ear shaped support is in threaded connection with the buffer outer barrel and enables the plunger piston to freely rotate around the buffer outer barrel; the piston is arranged between the buffer outer barrel and the piston rod; the sealing device is arranged between the buffer outer barrel and the piston rod and is locked through the locking nut; the oil needle rod is positioned into a hole in the plunger piston, and one end of the oil needle rod is fixed to the bottom end of the inner hole of the piston rod. According to the mechanism, the change of an oil running ring is reduced, so that the stable and high-efficiency buffering performance is realized; and meanwhile, the abrasion caused by contract between the plunger piston and the oil needle rod is avoided, and thus the service life of the oil needle rod is prolonged.

An overload protection device for a towbarless aircraft tow tractor comprises a buffering device and a control system; the buffering device comprises buffering hydraulic cylinders, a slide block, a slide block track and four connecting rods; the control system comprises a speed sensor, a hydraulic pressure sensor, an acceleration sensor, a position sensor, a controller, a power supply, an alarm system, a display system and an electric control regulating valve. The overload protection device for the towbarless aircraft tow tractor has the advantages that variable traction load under a special situation can be buffered by using the buffering hydraulic cylinders to protect an aircraft and the tractor against being destroyed, prevent overload and prevent the fatigue life of an aircraft landinggear structural part from being shortened; and therefore, the operation cost of an airline company is reduced; by using the four buffering hydraulic cylinders, the buffering force is stable, and comforts of a tractor driver and aircraft occupants can be improved; as the four buffering hydraulic cylinders are distributed in parallel, the operation performance of the tractor cannot be destroyed; and as the buffering forces of the four buffering hydraulic cylinders are large, the overload protection device for the towbarless aircraft tow tractor is especially suitable for objects with large masses such as the aircraft.