48results about How to "Increase buffer stroke" patented technology

The invention provides an external electric folding soft landing mechanism. The external electric folding soft landing mechanism comprises at least three groups of the same supporting mechanisms arranged on a vehicle body, each of the supporting mechanism groups comprises a damping post and a landing leg, wherein the damping post comprises an electric transmission mechanism and a hydraulic damping device; the electric transmission mechanism comprises a motor, a bearing, a lead screw and a plurality of stage transmission sleeves which are sequentially nested; the hydraulic damping device comprises a spiral fastening device, a piston rod, a piston head, a buffer outer cylinder and a sealing device. The landing mechanism disclosed by the invention is suitable for repeated use in perpendicular ascending and descending, and is stuck to the outer surface of the vehicle under a folding state, so that the aerodynamic influence on the vehicle is reduced, and the folding rigidity is good; when the landing mechanism disclosed by the invention is under an unfolding state, the supporting area is large, and the bearing capacity is strong; the landing mechanism disclosed by the invention has the characteristics of light in weight, simple in preparation technology, smooth in buffering process, free from rebounding during processes, and high in buffering efficiency, and can be repeatedly utilized; a protrusion structure of a mechanism casing can also achieve the effect that a rocket empennage is aerodynamically stabilized.

The invention relates to a shockproof protective shell of a portable electric appliance. The shockproof protective shell of the portable electric appliance comprises a protective housing which is additionally arranged on the surface of the portable electric appliance and adapts to the shape of the portable electric appliance. The shockproof protective shell is characterized in that a cushioning body which is raised to the exterior of the protective housing is arranged at the corner part or / and in the vicinity of the corner part of the protective housing. The shockproof protective shell disclosed by the invention can overcome the defect that the cushioning provided by the protective housing in the prior art is limited by the thickness in a very limited manner, and the cushioning body is arranged at the corner part and in the vicinity of the corner part of the housing, so that the cushioning stroke is greatly improved, the shock force of the portable electric appliance when the portable electric appliance falls to the ground accidentally is reduced, the shockproof performance of the local part is improved and the corner part of the housing of the electric appliance can be effectively protected from being damaged when bearing the external shock; and the shockproof protective shell has the advantages of simple structure, various forms, vivid and interesting properties and strong practicability, and can be widely applied to mobile phones, Walkmans, electronic dictionaries, ipads, digital cameras, mobile hard disks, GPS (global positioning system) navigation systems, notebook computers, calculators and other portable electric appliances so as to have very broad market application prospects.

The invention relates to a rubber buffering and vibration isolating elastomer structure which comprises an upper metal part, a rubber part and a lower metal part. An internal cavity structure is adopted by the rubber body of the invention to increase the buffering stroke of the rubber body, and the buffering deformation of the rubber body can reach 100%; and if the space along the axial direction of the elastomer structure is large enough, the buffering deformation can reach about 150%. The design of the cavity structure greatly increases the buffering deformation stroke of the rubber part by 2-4 times of the traditional rubber isolator, thereby greatly improving the buffering effect. The structure of the invention adopts the design of a gas channel; on the one hand, by the design of the gas channel, when the elastomer bears the impact load, because the action time of the load is short, the gas in the cavity is quickly discharged outwards through the gas channel, and the friction action of the gas and the channel increases the damping of the elastomer structure, thereby increasing the buffering effect of the elastomer structure; and on the other hand, by the design of the gas channel, the gas in the cavity can be smoothly discharged under the action of the load to avoid the uneven deformation of the rubber part caused by sealing of the cavity, thereby ensuring the rigidity stability of the elastomer structure in the deformation process.

The invention discloses a stroke varying type double-cylinder active magneto-rheological shock absorber based on a shearing mode. The stroke varying type double-cylinder active magneto-rheological shock absorber based on the shearing mode is composed of a bottom cover, an outer cylinder barrel, an inner cylinder barrel, an electromagnetic valve, a piston rod, a floating piston, a piston surroundedby a coil, metal rubber, a fuzzy controller, a sensor and the like, the electromagnetic piston is located in the inner cylinder barrel, the piston rod is connected with the electromagnetic piston, the inner cylinder barrel and the outer cylinder barrel are fixed on the same base, the inner cylinder barrel and the outer cylinder barrel are connected through a through hole in the side wall of the inner cylinder barrel, the electromagnetic valve is arranged on the portion, corresponding to the through hole of the side wall of the inner cylinder barrel, of the side wall of the outer cylinder barrel, the metal rubber and the floating piston structure are arranged on the inner side of the outer cylinder barrel. When the vibration absorber works, a central controller of a vibration damping system can control the current on the electromagnetic coil and opening of the electromagnetic valve so as to control the output force of the shock absorber according to an acceleration signal transmitted by an acceleration sensor installed on the shock absorber; and the central control system of the shock absorber can control the opening and closing degree of the electromagnetic valve according to thesize of the road excitation, and the buffer stroke is controlled.

The invention discloses an anti-collision buffering device special for a light-weight automobile. For the light-weight automobile with light weight, the anti-collision buffering device special for thelight-weight automobile can ensure that the impact force of a collision is reduced when a dangerous accident occurs. The anti-collision buffering device special for the light-weight automobile is provided with multi-layer shock-absorbing buffering assemblies, and the buffering effect is improved. When the impact is received, an axial force sensor can sense the impact situation and judge whether asecondary shock-absorbing buffering assembly needs to be started according to the detection value. When the impact force of an outer slide plate on an axial force sensor mounting seat is greater thana certain value, the axial force sensor mounting seat breaks away from a blind hole arm of the mounting seat, the secondary shock-absorbing buffering assembly moves, and a limiting seat, used for limiting the outer slide plate, on the mounting seat can break off under the impact of the outer slide plate, so that the secondary shock-absorbing buffering assembly can eject the outer slide plate to increase the buffering stroke, and the anti-collision buffering effect is improved. The anti-collision buffering device special for the light-weight automobile is very suitable for a safety anti-collision structure of the lightweight automobile, and particularly has a better anti-collision effect on a high-grade automobile.

The invention provides a single-piston-rod double-cylinder-barrel hydro-pneumatic spring. Equivalently, two hydro-pneumatic spring cylinder bodies share a piston rod. Two independent cylinder barrels are arranged at the two ends respectively and each assembled into an independent hydro-pneumatic spring cylinder body. The hydro-pneumatic spring cylinder body at one end is inflated with high-pressure nitrogen, and the hydro-pneumatic spring cylinder body at the other end is inflated with low-pressure nitrogen. Equivalently, two springs unequal in rigidity are overlapped, when the load is low, the hydro-pneumatic spring cylinder body (at the low air pressure end) inflated with the low-pressure nitrogen works, and after the load reaches a certain value, the two hydro-pneumatic spring cylinder bodies are connected in series to work together, the requirement for the large-range change of the effective rigidity is met, and the appropriate buffering stroke is achieved at the no load and the full load.

The invention discloses a double-resistance type expressway protection buffer device which comprises a stand column, a connecting arm, a sliding sleeve, a spring and a guardrail, and the sliding sleeve comprises a first sliding sleeve body and a second sliding sleeve body. The stand columns are vertically installed in the middle of an isolation belt of an expressway or on the two sides of the expressway. A clamping ring, a first sliding sleeve, a second sliding sleeve and a blocking piece are sequentially arranged on the stand column from bottom to top, the clamping ring and the blocking pieceare fixedly connected with the stand column, and the first sliding sleeve and the second sliding sleeve are connected in a relative sliding mode in the axial direction of the stand column. A spring is arranged between the clamping ring and the first sliding sleeve, and the two ends of the spring are connected with the clamping ring and the first sliding sleeve; a spring is arranged between the second sliding sleeve and the blocking piece, and the two ends of the spring are connected with the second sliding sleeve and the blocking piece. By means of the structural design, the buffering distance of a vehicle when the vehicle collides with the guardrails is increased, the guardrails shrink to drive the opposite guardrails to get close to the middle portion, the breaking strength is improvedthrough superposition of the two layers of guardrails, and a great positive effect is achieved for reducing the accident level.

The invention provides a buffer mechanism of an automatic transmission, and belongs to the technical field of speed change devices. The buffer mechanism solves the problem that an existing buffer mechanism is short in buffer stroke and insufficient in buffer effect. The buffer mechanism comprises a buffer shell which is fixed on a main shaft in the circumferential direction and abuts against an input component, the face, facing the input component, of the buffer shell is provided with an annular cavity, and the annular cavity is internally provided with an annular first elastic buffer component with the head and tail ends. When the input component rotates, the head end of the first elastic buffer component can be driven to move along the annular cavity, the annular cavity includes an innerring groove and an outer ring groove which are independent of each other, the first elastic buffer component is arranged in the outer ring groove, an annular second elastic buffer component with thehead and tail ends is arranged in the inner ring groove, the head end of the second elastic buffer component is fixedly connected with the tail end of the first elastic buffer component, and the tailend of the second elastic buffer component is fixedly connected with the buffer shell. The buffer mechanism has the advantages of being long in buffer stroke, good in buffer effect, low in cost and the like.

The invention discloses a rocker arm type unmanned aerial vehicle ski buffering device. The rocker arm type unmanned aerial vehicle ski buffering device is composed an upper vehicle body connector, adamper, a ski bar and a rocker arm, wherein the upper vehicle body connector is arranged under a vehicle body and connected with the upper end of the damper through a damper-vehicle body connecting pin; a ski bar front connector is arranged in front of the vehicle body and connected with the ski bar through a ski bar-vehicle body connecting pin; the lower end of the damper is connected with the rocker arm through a damper-rocker arm connecting pin. During parachute landing, when the ski bar touches down, a ski bar support arm module can rotate around the ski bar front connector and a rocker arm-vehicle body connector under the action of support reaction force of the ground; during rotation, the ski bar support module can compress the damper, which then absorbs the sinking kinetic energy ofthe vehicle body to achieve buffering and damping effects; the ski is in a rocker arm type structure to achieve a long buffer stroke and reduce recovery overloading, and by means of high sideslip andground fiction, can absorb more impact energy to effectively protect safety of the vehicle body and equipment.

The invention discloses a regression buffering structure which comprises a shell body mechanism, a sliding mechanism, a stirring piece, an elastic piece and a buffering mechanism. The sliding mechanism is arranged in the shell body mechanism in a sliding mode. The stirring piece is provided with a stirring part which abuts against the sliding mechanism in a separable mode in a clamping mode. The elastic piece is arranged in the shell body mechanism. The buffering mechanism is arranged in the shell body mechanism. The buffering mechanism comprises a hollow outer pipe, a first pushing rod and a second pushing rod. One end of the first pushing rod is arranged in the hollow outer pipe in a sliding-sleeved mode from a first end. One end of the second pushing rod is arranged in the hollow outer pipe in a sliding-sleeved mode from a second end. The buffering mechanism comprises the hollow outer pipe and the two pushing rods, compared with a commonly-used oil pressure damping device of a regression buffering device, a longer buffering stroke is provided so that the time of buffering damping effect can be prolonged, and then the effects of effective buffering improving and noise lowering can be achieved.

The invention relates to a rubber buffering and vibration isolating elastomer structure which comprises an upper metal part, a rubber part and a lower metal part. An internal cavity structure is adopted by the rubber body of the invention to increase the buffering stroke of the rubber body, and the buffering deformation of the rubber body can reach 100%; and if the space along the axial directionof the elastomer structure is large enough, the buffering deformation can reach about 150%. The design of the cavity structure greatly increases the buffering deformation stroke of the rubber part by2-4 times of the traditional rubber isolator, thereby greatly improving the buffering effect. The structure of the invention adopts the design of a gas channel; on the one hand, by the design of the gas channel, when the elastomer bears the impact load, because the action time of the load is short, the gas in the cavity is quickly discharged outwards through the gas channel, and the friction action of the gas and the channel increases the damping of the elastomer structure, thereby increasing the buffering effect of the elastomer structure; and on the other hand, by the design of the gas channel, the gas in the cavity can be smoothly discharged under the action of the load to avoid the uneven deformation of the rubber part caused by sealing of the cavity, thereby ensuring the rigidity stability of the elastomer structure in the deformation process.

The invention relates to the technical field of ocean engineering equipment and discloses an ocean buoy which comprises a floating body, wherein an instrument rack is arranged on the top surface of the floating body; a support rack is arranged on the bottom surface of the floating body; a support plate is arranged on side surfaces of the support rack; channel steel is arranged on the bottom surface of the support plate; an adaptor is arranged on the bottom surface of the channel steel; the top end of the adaptor extends into the channel steel and is connected with a limiting part. Due to adoption of an arch-shaped anti-collision strip, the anti-collision strip is bent and deformed by stress preferably in the process that a ship is collided to the floating body, and cushioning stroke is increased; due to adoption of a variable cross section of the anti-collision strip, the stress to the floating body is slowly increased, the instantaneous impact force caused when the floating body collides to the ship is effectively reduced, the floating body is not deformed in the collision process, has a gravity center kept unchanged, is uniformly stressed when floating on the ocean surface, and is not overturned in sea waves, marine hydrology water quality meteorological data of ocean are normally collected after the ocean buoy is collided, and security of related operators and facilities canbe ensured.

The invention relates to the related field of dampers, and discloses a damping device capable of automatically adjusting damping stroke according to vibration intensity. The damping device comprises a main box body, a primary damping cavity is arranged in the main box body, a damping column sliding cavity with an upward opening is arranged on the upper side of the primary damping cavity, a secondary damping cavity communicates with the lower side of the primary damping cavity, and the left side and the right side of the secondary damping cavity communicate with magnetic sliding plate cavities which are symmetrical left and right with the secondary damping cavity as the center. The elastic force borne by a damping column push plate can be automatically adjusted according to the pressure borne by a damping column and the downward moving speed of the damping column, and therefore when the pressure borne by the damping column is small, the enough long buffering stroke can be guaranteed; and accordingly it is guaranteed that the damping column can be sufficiently buffered; when the damping column bears large pressure, it can also be guaranteed that the downward moving distance of the damping column is not too large, and the situation that a primary damping spring is damaged due to too large deformation is avoided; and meanwhile, the sensitivity of damping stroke adjustment can be changed, and the device can meet the damping requirements in different operation environments.

A friction clutch type draft gear assembly (10) includes a housing (18) having an open front end (22) and a closed rear end forming a ledge (21) for enabling a longer buff and draft travel while fitting into a 24.625 inch draft gear pocket. A friction clutch mechanism (20) includes a pair of outer stationary plate members (12), a pair of movable plate members (38), a pair of inner stationary plate members (44) having an inner surface (48) which is tapered at an angle of approximately 4.5 DEG , a pair of wedge shoe members (54) having an upper surface (58) which is tapered relative to a longitudinal axis of the friction clutch mechanism (20), and a center wedge member (66) which includes a pair of correspondingly tapered surfaces (68). The tapered upper surface (58) of the pair of wedge shoe members (54) is tapered at an angle of approximately 49.0 DEG -50.0 DEG . The pair of tapered surfaces (68) of the center wedge (66) is tapered at an angle of about 49.5 DEG.

The invention provides a double-air chamber piston type energy accumulator for an oil gas suspension, and belongs to the technical field of oil gas suspensions. The double-air chamber piston type energy accumulator for the oil gas suspension comprises an upper cylinder body and a lower cylinder body, the inner cross sectional area of the upper cylinder body is not equal to the inner cross sectional area of the lower cylinder body, the lower end of the upper cylinder body and the upper end of the lower cylinder body are in sealed connection to enable the upper cylinder body and the lower cylinder body to communicate with each other, an upper floating piston is arranged in the upper cylinder body, a lower floating piston is arranged in the lower cylinder body, a limiting block is arranged atthe position, between the upper floating piston and the lower floating piston, of the upper cylinder body or the lower cylinder body, an up-and-down through oil hole is formed in the middle portion of the limiting block, an oil nozzle is connected to the position, between the upper floating piston and the lower floating piston, of the upper cylinder body or the lower cylinder body, the upper cylinder body is connected with an upper gas injecting nozzle through an air way, and the lower cylinder body is connected to a lower as injecting nozzle through an air way. The double-air chamber pistontype energy accumulator has the beneficial effects that the effective working areas of two air chambers are different, the damping thrusts of the two air chambers are different, buffer damping provided by the oil gas suspension can be guaranteed, and meanwhile, the requirement of a vehicle during non-load or full-load states is met.

The invention relates to a furniture hinge (4) comprising a hinge arm (6) having a longitudinal axis (X), a hinge cup (5) that is connected to the hinge arm (6) and is mounted such as to be pivotable relative to the hinge arm (6) between a closed position and an open position, and further comprising a linear damper (7) having a linear damping stroke (Y) for damping a movement of the furniture hinge (4), wherein the linear damper (7) is arranged at the hinge cup (5) and, jointly therewith, can be arranged within a bore of a furniture item (3) in the installed position, wherein in the open position of the furniture hinge (4) in a plan view, the direction of the linear damping stroke (Y) of the linear damper (7) runs at an acute angle (alpha) relative to the longitudinal axis (X) of the hinge arm (6), the acute angle (alpha) being between 3° and 20°.

The invention discloses a clamp slot cut-off anti-disturbance shock isolation platform, belongs to the technical field of anti-shock, and particularly relates to a clamp slot cut-off anti-disturbanceshock isolation platform for protecting precision instruments and equipment of ships. The clamp slot cut-off anti-disturbance shock isolation platform is based on a six-bar parallel mechanism, and hasthe capability to isolate shock in multiple directions. The clamp slot cut-off anti-disturbance shock isolation platform includes a platform board used for placing equipment, a base connected with aship, and six shock isolators. The platform board, the base and the shock isolators are connected by hook joints. The cylinder bodies of the shock isolators are elastic, and are internally provided with clamp slots. The clamp slots are matched with pistons to provide a limit cut-off force to meet the anti-disturbance requirement of inertial navigation, radar and other ship-borne measurement and detection equipment during normal work and the cushioning protection requirement under strong impact. The isolation platform is all-metal, and has the advantages of high environmental adaptability, simple mechanism, high reliability, long service life and easy maintenance.

The invention provides a bellow-type mixed medium vibration isolating and absorbing unit comprising a bellow. Both ends of the bellow are fixedly connected to an upper end plate and a lower end plate to form a bellow container; the bellow container is arranged in a pilot sleeve; the bottom of the bellow container is fixedly connected with the pilot sleeve; a gap is reserved between the side wall of the bellow and the side wall of the pilot sleeve; the bellow container is provided with an opening; a liquid-solid mixed medium which consists of elastic unit bodies and liquid is filled in the bellow container; the top of the pilot sleeve is fixedly connected with a limit disc for preventing the upper end plate from slipping; an upper connecting rod is connected with the upper end plate after passing through the limit disc; and a lower connecting rod is connected with the bottom of the pilot sleeve. By the scheme of the invention, the leakage problem of liquid and gas is thoroughly avoided. The mixed medium vibration isolating and absorbing unit has the advantages that the carrying capacity is high, the natural frequency is low, the structure is simple, the use and the maintenance are convenient and the vibration isolating and absorbing performance can be flexibly regulated by increasing and decreasing the number of the elastic unit bodies.

The invention discloses a hinge structure for an automobile trunk lid and an automobile. The hinge structure comprises a hinge fixing seat, a hinge arm, a connecting plate and a damping element, the hinge fixing seat is used for being connected with a trunk body of an automobile trunk, one end of the hinge arm is hinged to the hinge fixing seat, and the other end of the hinge arm is used for being connected with the trunk lid of the automobile trunk; and one end of the connecting plate is hinged to the hinge arm, the other end of the connecting plate is used for being connected with a torsion spring, a slideway is formed in the hinge fixing seat, one end of the damping element is hinged to the hinge arm, and the other end of the damping element is arranged in the slideway and can slide along the slideway along with movement of the hinge arm. In the opening or closing process of the trunk lid, after the other end of the damping element slides to one end of the slideway, the trunk lid continues a stroke of opening or closing under the action of the torsional spring, and the damping element is stressed to be compressed or stretched to achieve the speed reduction and buffering effects. The damping force generated when the trunk lid is opened to the high position is increased, so that the opening speed is reduced, and meanwhile the problem that the closing force is large is solved.

The invention provides a vibration reduction block for a vacuum pump and a vacuum pump assembly. The vacuum pump comprises a mounting lug, the mounting lug comprises a mounting lug body and a mounting lug end part, the vibration reduction block comprises a vibration reduction block body, a mounting hole corresponding to the mounting lug body is formed in the vibration reduction block body, the mounting lug body is mounted in the mounting hole, and an extension part is arranged on the vibration reduction block body. The extension part is formed by extending in the radial direction from the end, away from the vacuum pump, of the vibration reduction block body. By optimizing the structure of the vibration reduction block, the vacuum pump body is in full contact with the vibration reduction block, the buffering stroke is increased, the impact force of the pump body on a fixing support is reduced, and the vacuum pump and the fixing support are fully protected. Meanwhile, the vacuum pump assembly using the vibration reduction block has excellent anti-vibration performance, the normal function of a brake module can be ensured in the running process of the vehicle, and the noise of the vehicle is reduced.

The invention discloses a special anti-collision buffer device for lightweight automobiles. For lightweight automobiles with light weight, the invention can ensure that the impact force of the collision is reduced when the automobile has a dangerous accident. The invention is provided with multi-layer shock absorption The cushioning component can improve the cushioning effect. When an impact is received, the axial force sensor can sense the impact and judge whether it is necessary to open the secondary shock-absorbing buffer component according to the detected value. When the impact force is greater than a certain value, the axial force sensor mounting seat breaks off from the blind hole arm of the mounting seat, and the action of the secondary shock-absorbing buffer assembly, the limit seat on the mounting seat that limits the outer slide plate is impacted by the outer slide plate The bottom can be broken, so that the secondary shock-absorbing and buffering assembly ejects the outer slide plate to increase the buffering stroke and improve the buffering effect of anti-collision. The invention is very suitable for the safety anti-collision structure of lightweight automobiles, and especially has better anti-collision effects for high-end automobiles.

The invention relates to the technical field of storage tools for travelling and in particular relates to a wheel diameter adjusting structure for a travelling trolley case. According to the wheel diameter adjusting structure for the travelling trolley case, provided by the invention, an outer-side transverse rod of a connection supporting rod is axially connected with a bottom rolling wheel composed of a shaft barrel, a lateral inner thread connection pipe, an arc-shaped supporting plate, an inner guide pipe, an inner adjusting screw rod and an extrusion spring; the distance between the arc-shaped supporting plate and the shaft barrel is adjusted through a thread by utilizing the inner adjusting screw rod, so that changing the external diameter of rolling wheel freely according to the requirements to make the structure of the rolling wheel adjustable, and the adjustment is realized conveniently through only rotating the inner adjusting screw rod, the operation is simple and convenientand an applicable range is wider; the extrusion spring is matched so that the arc-shaped supporting plate and the shaft barrel are elastically connected and the vibration absorption performance is greatly improved; when the structure is used on a jolted road surface, a buffering stroke is lifted through expanding a wheel diameter so as to effectively reduce the jolt of the case and the stabilityis improved.

A suspension type elevator buffer is provided with a car, wherein the car is square; a buffer body is arranged on the bottom of the car; and a base of the buffer body is connected with the plane of the bottom of the car through screws. When the car of an elevator drops due to stall and the buffer body is collided with the ground, vibration and impact force which are generated due to collision are transmitted to the car of the elevator after being reduced by the buffer body. The suspension type elevator buffer is simple in structure. By using the suspension type elevator buffer, modification of old elevators and arrangement of new elevators are facilitated.

The invention discloses a gear shifting connecting rod mechanism. The mechanism comprises a gear shifting connecting rod assembly and a ball bowl used for being connected with a gear shifting rocker arm, and the gear shifting connecting rod assembly comprises a connecting piece, a gear shifting connecting rod, a first elastic piece and a second elastic piece; one end of the connecting piece is connected with the ball bowl, a first through hole is formed in the other end of the connecting piece, a cavity is formed in the connecting piece, one end of the gear shifting connecting rod is movably arranged in the cavity, and the other end of the gear shifting connecting rod penetrates through the first through hole; a limiting part is arranged on the gear shifting connecting rod, the first elastic piece is arranged at one end of the gear shifting connecting rod in a sleeving mode, the first elastic piece abuts against one end of the limiting part, and the first elastic piece is supported atthe end, far away from the first through hole, of the cavity; and the second elastic piece is arranged at the other end of the gear shifting connecting rod in a sleeving mode, the second elastic pieceabuts against the other end of the limiting part, and the second elastic piece is supported on the first through hole. According to the gear shifting connecting rod mechanism, the buffer damping effect of the gear shifting connecting rod mechanism can be effectively improved, and therefore a transmission is prevented from being damaged.

The invention provides an anti-rebound and anti-off door stop and belongs to the technical field of door stops. Through the anti-rebound and anti-off door stop, the technical problem that an existingdoor stop structure is likely to rebound a door body when impact force of the door body is large is solved. The anti-rebound and anti-off door stop comprises a base and a collision head. The base is internally provided with a travel cavity. The inner end of the collision head is in sliding fit with the interior of the travel cavity. A damping part is arranged between the inner end of the collisionhead and the base. The collision head is provided with friction pieces abutting against the inner sidewall of the travel cavity. When the collision head slides to the exterior of the base, pressing force of the friction pieces acting on the inner sidewall of the travel cavity gradually increases. When the collision head slides to the interior of the base, pressing force of the friction pieces acting on the inner sidewall of the travel cavity gradually decreases. The anti-rebound and anti-off door stop provided by the invention can effectively prevent the door body from being rebounded and getting away from the door stop.

The invention discloses a comfortable damping anti-bottoming shock absorber and a three-wheeled motorcycle, which include an inner cylinder, an outer cylinder and a main shock-absorbing spring. The main damping spring is a sudden change pitch spring composed of a long pitch section and a short pitch section, and also includes an anti-bottoming damping member installed on the inner bottom of the outer cylinder facing the inner cylinder, and the inner cylinder goes down and is covered with an anti-bottoming When the damper is used, there is a gap in the lateral direction with the anti-bottoming damper; the inner cylinder is sleeved on the outer cylinder through the piston, and the inner cylinder is located above the piston. It is filled with oil, and the space is connected to the inner cylinder; the present invention adopts abrupt pitch springs and anti-bottoming damping parts, and the damping force formed by the anti-bottoming damping parts works together with the sudden pitch springs to avoid When driving, the shock absorber bottoms out, improving driving comfort and ensuring controllability.

The invention discloses a linear self-locking retractable tail buffer device, which is composed of an electric actuator, a slideway assembly, a shock absorber and a tail rocker arm; connect. The slideway assembly is arranged at the body tail, and the shock absorber sliding pin slides along the slideway in the slideway assembly. The tail rocker ear piece is connected with the body tail. There is a connecting hole on the tail rocker arm to connect with the shock absorber through the shock absorber connecting pin. When the UAV is launched, the electric actuator pulls the tail of the shock absorber to slide along the slideway, and drives the tail rocker to rotate upwards to reduce the aerodynamic resistance during flight. When the UAV enters the recovery route, the electric actuator pushes the shock absorber to slide backward along the slideway, and the shock absorber drives the tail rocker to rotate downward. When the angle between the axis of the shock absorber and the axis of the chute in the slideway assembly is greater than At 90°, the shock absorber and the rear rocker are in a self-locking state. When landing, the tail rocker arm rotates upwards to compress the shock absorber to realize the function of shock absorption and buffering.

The invention provides an energy absorbing and rebounding disengagement preventing door stop, and belongs to the technical field of door stops. The technical problem that an existing door stop structure is probably subjected to rebounding disengagement when impact force of a door body is large is solved. The energy absorbing and rebounding disengagement preventing door stop comprises a seat body and a collision head. A travel cavity is formed in the seat body, the inner end of the collision head slidingly cooperates in the travel cavity, the travel cavity communicates with the exterior, a damping part is arranged between the inner end of the collision head and the seat body, the periphery of the collision head is sleeved with a sealing ring, when the collision head slides towards the exterior of the seat body, the sealing ring abuts against the portion between the collision head and the inner side wall of the travel cavity in a sealing manner, when the collision head slides towards theinterior of the seat body, an air pass channel can be formed between the sealing ring and the collision head or the inner side wall of the travel cavity, and cavities, on the two sides of the sealingring, of the travel cavity communicate with each other. According to the energy absorbing and rebounding disengagement preventing door stop, the door body can be effectively prevented from being subjected to rebounding disengagement.