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 discloses a recyclable paperboard material lock catch structure for kitchen household appliance sets. The structure comprises an electric stewing pot buffer module, a soybean milk machine body buffering module, a stirring cup fixing module, a stirring cup seat buffering and fixing module and an outer box, wherein the electric stewing pot buffering module, the soybean milk machine body buffering module, the stirring cup fixing module, the stirring cup seat buffering and fixing module and the outer box are all provided with paperboard profiling self-locking structures correspondingto the outer shape of a machine body, and the electric stewing pot buffering module, the soybean milk machine body buffering module, the stirring cup fixing module and the stirring cup seat bufferingand fixing module are sequentially connected and combined and then are matched with the outer box. The structure is simple, novel and fine in structure, the operation is convenient and efficient, combined switching is carried out according to the actual use requirements, the buffering protection performance is better, the adjustment performance is high, the energy is saved, the environment is protected, the use cost of a terminal user is reduced, the packaging buffer safety performance of ceramic and glass fragile products is improved, the user experience is indirectly improved, and the transportation safety is effectively ensured.

The invention discloses a combined energy absorption structure, and relates to an energy absorption structure. The invention aims to solve the problem that the overall energy absorption capacity of the filling structure is reduced due to invasion of a thin-walled tube into a honeycomb when the existing honeycomb filling thin-walled tube structure is compressed. The energy absorption structure comprises a buffer energy absorption block (1) and a porous thin-walled tube (2), the buffer energy absorption block (1) is a variable-thickness energy absorption block, the porous thin-walled tube (2) isa variable-thickness thin-walled tube, and the porous thin-walled tube (2) is filled with the buffer energy absorption block (1) to form an energy absorption structure (3). The buffer energy absorption block (1) is a honeycomb block, a foam block or a rubber block. The strength of the buffer energy absorption block (1) is equal or variable. The porous thin-walled tube (2) comprises an inner thin-walled tube (4), an outer thin-walled tube (5) and a stiffened plate (6), the inner thin-walled tube (4) is embedded into the outer thin-walled tube (5), and the stiffened plate (6) is arranged between the inner thin-walled tube (4) and the outer thin-walled tube (5). The combined energy absorption structure is applied to the fields of automobiles, aerospace and the like with buffer systems.

The invention discloses a leg-type combined buffer for a recoverable rocket landing mechanism, and relates to the field of aerospace. The leg-type combined buffer for the recoverable rocket landing mechanism solves the problem that an existing landing buffer mechanism only adopts a metal honeycomb structure as buffer material resulting in relatively low impact energy absorbed per unit volume and non-satisfaction of the requirements of rocket landing recovery. In the leg-type combined buffer for the recoverable rocket landing mechanism, a buffer outer case is of a hollow cylindrical structure;a buffer cavity and a base are sequentially arranged in the buffer outer case from top to bottom; the base is fixed at the bottom of the buffer outer case; the buffer cavity is fixed on the base; thebuffer cavity is of a hollow cylindrical structure; a first piston push rod, a low-density metal honeycomb, a second piston push rod and a high-density metal honeycomb are sequentially arranged in thebuffer cavity from top to bottom; and the stiffness of the low-density metal honeycomb is less than the stiffness of the high-density metal honeycomb. The leg-type combined buffer for the recoverablerocket landing mechanism improves the buffer energy-absorption performance, thereby satisfying the requirements of rocket landing recovery.

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 wheel damping device and a wheel damping system, and relates to the field of mechanical design. According to the specific embodiment of the method, the device comprises a first elastic assembly and a second elastic assembly having one end fixed to a vehicle body portion and the other end elastically movable, a guide assembly fixedly connected to the movable ends of the first elastic assembly and the second elastic assembly, a first support assembly rotatably connected between the movable end of the first elastic assembly and a wheel portion, and a second support assembly rotatably connected between the movable end of the second elastic assembly and the wheel portion and opposite to the first support assembly. The first elastic assembly and the second elastic assembly are oppositely arranged, and the elastic moving directions of the movable ends of the first elastic assembly and the second elastic assembly are opposite and parallel to the bottom surface of a vehicle body. By means of the embodiment, stable buffering force can be provided by means of the elastic assemblies arranged in the horizontal direction and the related assemblies, so that the stabilityof wheels during running or turning is guaranteed.

The invention relates to a buffering landing leg of a reusable launch vehicle and a buffering method of the buffering landing leg, and belongs to the technical field of landing legs. The buffering landing leg comprises an outer sleeve (5), an inner lining cylinder (3), a concave type cylinder (7), a rotating motor (1), a pushing rod (4), a floating piston (8), a piston cylinder (12), a gasket (10), a honeycomb-like buffering material (11), a spherical hinge (13), a foot pad (14) and an end cover (9). The buffering landing leg is characterized by combining three buffering modes which are the oil buffering mode, the damping rubber buffering mode and the honeycomb-like buffering mode, and multi-level buffering can be conducted. The buffering landing leg can adapt to different initial landing situations and can be retracted and released automatically, and manual ground operation is not needed.

The invention provides a rope hook recovery damping system based on a brushless motor. The rope hook recovery damping system comprises a recovery motor, a recovery rope, a rope wheel, a system supportand a recovery motor support, wherein the recovery rope is used for transmitting buffering force of an unmanned aerial vehicle and providing a small amount of elasticity and damping; the rope wheel is used for transmitting torque output by the recovery motor to the recovery rope; the recovery motor is used for bidirectional conversion between electric energy and mechanical energy; and the brushless motor is used as a power source, the system response speed is high, the recovery force can be rapidly adjusted through an electric control system, recovery damping is self-adaptive, safety and reliability are achieved, and the designability is high.

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.

A hydraulic control system comprises an oil tank, an oil pump, a filter, an overflow valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a one-way valve, a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder. The oil tank, the filter, the oil pump and the one-way valve are sequentiallyconnected to form an oil delivery way. A first oil way and a second oil way are arranged at the downstream position of the one-way valve, the first electromagnetic valve is arranged on the first oilway, the second electromagnetic valve is arranged on the second oil way, the first oil way is connected with one ends of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder, and the second oil way is connected to the other ends of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder. The first oil way is connected with a first oil return way, and the second oil way is connected with a second oil return way.

The invention discloses a universal buffer for multi-freedom posture adjustment, and belongs to the field of configuration for buffer and posture adjustment for a used aircraft or other effective loads. The universal buffer mainly comprises a support structure consisting of a universal joint cross (6), a connecting frame (2), a lower support frame (1) and an upper support frame (2); the universalbuffer also comprises a bottom inclined energy buffer and inclined posture adjustment mechanism consisting of a brake disc arranged on the universal joint cross (6) and an inclined posture adjustmentgear; and the universal buffer also comprises a vertical energy buffer and vertical posture adjustment mechanism consisting of a cylindrical piston rod (9), a double-layer outer cylinder (11) and a corresponding coil in the middle of the universal buffer. The universal buffer overcomes the defects of the conventional buffer, and realizes controllability of a buffer process and adjustability of a buffer post posture.

The invention discloses a two-way sliding door centre adjustment buffer which comprises a shell mechanism, a buffer mechanism and a poking piece. The shell mechanism comprises a shell and a lower iron part, two grooves are formed in the shell and respectively provided with a bent bayonet, the buffer mechanism comprises a primary sliding body, two release claws, two pull rods, two secondary sliding bodies, two groups of buffer parts and two elastic parts, the two release claws are mounted on the primary sliding body, each release claw is provided with a release rod, the release rods are matched with the grooves, each secondary sliding body is respectively connected with one group of buffer parts and one elastic part, pull grooves are formed in the secondary sliding bodies, one end of each pull rod is connected with the primary sliding body, the other end of the pull rod is matched with the corresponding secondary sliding body, the poking piece is provided with a poking portion, and the poking portion and a poking space formed by the two release claws are separably clamped and abutted. The two-way sliding door centre adjustment buffer can achieve two-way centre adjustment buffer functions and is more stable in buffer performance, more ideal in buffer effect and low in noise.

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, an installation cover plate and a damper; the top of the shell is provided with an installation hole; the linkage part is provided with a push structure; the left part of the linkage part is arranged in the shell through the first rotary shaft, and the right part of the linkage part is connected with the hinge cup through one shaft body of the U-shaped rotary shaft; the left part of the connection part is arranged in the shell through the second rotary shaft, and the right part of the connection part 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 installation cover plate is embedded in the installation hole and is provided with a dovetail groove; the top of the damper is provided with an insertion-connection structure inserted in the dovetail groove; the damper is provided with a stop block; 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 present invention relates to the field of law enforcement equipment, specifically a high-sensitivity video and audio recorder for single police law enforcement with anti-drop function, including a recorder device and a wearing storage mechanism. The recorder device is located inside the wearing storage mechanism. The recorder device includes a recorder body and a handle, and the bottom of the recorder body is fixedly connected with the handle. By setting up the wearing storage mechanism and using the storage slot formed by the storage frame and the storage slot, the recorder device can be given a safe and effective storage space. By wrapping the recorder device for protection, people can wear the recorder device on the The front of the chest can be effectively protected, avoiding the damage of the recorder device caused by other objects or personnel touching the recorder device due to external emergencies, and achieving the advantage of safety protection for the recorder device.

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.

The invention discloses a parallel self-resetting high-efficiency buffer braking machine, which comprises a connecting rod and two completely identical buffer braking mechanisms. The two buffer braking mechanisms are arranged symmetrically, and one end is connected through a connecting rod. The buffer brake mechanism includes the brake outer cylinder, the brake inner cylinder, the brake inner cylinder end cover seal ring ring seal, the first friction plate, two limit bolts, several disc springs and two second friction plates, etc. . The first friction plate and the two second friction plates are bolted together to achieve efficient energy dissipation through metal yielding, frictional heat generation, and viscous damping. The retreating inner cylinder and the retreating outer cylinder are nested together and filled with liquid, and the liquid flow hole formed by the gap plays the effect of hydraulic braking during retreating. Belleville springs provide restoring force to the device through elastic deformation of the material. The invention can be used to buffer huge impact loads and realize self-resetting, and has the advantages of good parallelism, smooth buffering and re-entry, stable retreating force, light weight, high buffering performance and large energy consumption.

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.

The invention provides a reusable collision and energy absorption device for a rail vehicle. The reusable collision and energy absorption device comprises an impacted rod, an outer pipe, a damping structure, a resetting structure and an end part base, wherein the damping structure comprises a damping plug, a guide pipe and a damping elastic element; the resetting structure comprises a resetting piston and a resetting elastic element; the outer pipe is of a tubular structure and the inner part of the outer pipe is separated into a front cavity and a rear cavity through a separation plate; the separation plate is provided with a damping hole with a through hole shape, so that damping fluid can circulate between the front cavity and the rear cavity; at least part of length of the damping plugis arranged in the damping hole when the damping plug is located at an initial position; the damping plug can move along a frontward-backward direction of the device when being impacted; a gap is formed between the radial thickest part of the damping plug and the damping hole and supplies the damping fluid to circulate between the front cavity and the rear cavity. The device provided by the invention has a good energy absorption effect and can be used for reducing injuries to passengers in secondary collision; the device can be repeatedly used so that the cost of the energy absorption devicecan be remarkably reduced.

A combined energy-absorbing structure relates to an energy-absorbing structure. The present invention aims to solve the problem that the overall energy absorption of the filled structure is reduced due to the thin-walled tubes intruding into the honeycomb when the existing honeycomb filled thin-walled tube structure is compressed. The invention comprises a buffer energy-absorbing block (1) and a porous thin-walled tube (2), the buffering energy-absorbing block (1) is a variable-thickness energy-absorbing block, the porous thin-walled tube (2) is a variable-thickness thin-walled tube, and the buffering energy-absorbing The block (1) is filled into the porous thin-walled tube (2) to form an energy-absorbing structure (3). The buffer energy-absorbing block (1) is a honeycomb block, a foam block or a rubber block. The strength of the buffer energy-absorbing block (1) is equal strength or variable strength. The porous thin-walled pipe (2) includes an inner thin-walled pipe (4), an outer thin-walled pipe (5) and a stiffened plate (6), the inner thin-walled pipe (4) is embedded in the outer thin-walled pipe (5), A stiffened plate (6) is provided between the inner thin-walled pipe (4) and the outer thin-walled pipe (5). The invention is used in fields with buffer systems such as automobiles and aerospace.

The invention relates to a large-angle door hinge. The large-angle door hinge is characterized by comprising a main body, outer rocking and inner rocking arms, a first pin shaft to a ninth pin shaft, a damper, a connecting arm, a crank, a spring base, a spring, a swing arm and a hinge cup; the outer rocking arm is connected with the main body and the connecting arm through the first and second pin shafts; a positioning convex block is arranged on the outer rocking arm; a chute is formed in the connecting arm; a slide block and an arc recess are arranged on the damper; the slide block is arranged in the chute; a piston rod of the damper is arranged on the connecting arm; the positioning convex block is positioned in the arc recess; the crank is connected with the main body through the fourth pin shaft; the crank is connected with the connecting arm and the spring base through the third pin shaft; the spring is arranged in the spring base; the spring base is connected with the crank through the fifth pin shaft; the swing arm is connected with the crank and the inner rocking arm through the sixth pin shaft; the inner rocking arm is connected with the swing arm through the seventh pin shaft; the inner rocking arm is connected with the hinge cup through the ninth pin shaft; and the hinge cup is connected with the connecting arm through the eighty pin shaft. The large-angle door hinge has the advantages of compact structure, stable buffer force and high precision.