59results about How to "To achieve the effect of cushioning and shock absorption" patented technology

The invention discloses a passive energy-storage ankle joint and foot mechanism for power-assisted exoskeletons of lower limbs. The passive energy-storage ankle joint and foot mechanism comprises an ankle joint unit, a foot-side panel unit and a foot pad unit, wherein the ankle joint unit comprises a crus rod and a compression spring and an ankle-joint guide rod; the compression spring and the ankle-joint guide rod are arranged in the crus rod; the foot-side panel unit comprises a foot-side panel, a foot pad and a wavy spring body; the foot-side panel comprises a side plate and a bottom plate; the foot pad and the wavy spring body are arranged at the lower end of the bottom plate; an arc-shaped surface is arranged on the side plate; the lower end of the crus rod is hinged on the side plate; and the lower end of the ankle-joint guide rod is contacted with the arc-shaped surface under the action of the compression spring and moves along the arc-shaped top surface. The passive energy-storage ankle joint and foot mechanism disclosed by the invention has the advantages that the foot structure of a human body, the human body and the mass and the inertial action of the exoskeletons are fully utilized, the passive energy storage of the ankle joint and the bottom-touching energy storage of the bow-shaped sole in the traveling process are realized, the wearing is comfortable, the energy storage is low and the practicability is strong.

The invention discloses a knitting mechanical device. The knitting mechanical device comprises a machine case and a knitting machine; the bottom of the knitting machine penetrates through machine caseand extends into an inner cavity of the machine case; sliding ways are disposed on the two sides of the inner cavity of the machine case correspondingly; a first supporting plate is fixedly connectedto the bottom of the knitting machine; and supporting rods are fixedly connected to the two sides of the first supporting plate correspondingly. By arranging the first supporting plate, the effect ofsupporting the knitting machine is achieved; by arranging dampers, the buffering and damping effects on the knitting machine are achieved, and meanwhile the effect of stably supporting the knitting machine is achieved; by arranging an arc-shaped plate, a first spring and second springs, the damping effect on the knitting machine is achieved, meanwhile the effect of stably supporting the knittingmachine is achieved, the precision of knitted products is guaranteed, the service life of the knitting machine is prolonged, and the problems that the precision of the knitted products is affected dueto large vibration when the knitting machine works, and the service life of the knitting machine is shortened are solved.

The invention relates to the technical field of new energy vehicles and particularly relates to new energy vehicle distribution box with stable installation. The new energy vehicle distribution box comprises a lifting platform, motors, four screws 1, a support plate, two fixed plates, a clamping plate, a fixed table, a screw 2, a shock absorbing mechanism and a bottom plate. The bottom end of theleft side of the lifting platform is provided with a control switch, the motors are arranged at four corners of the bottom end of the lifting platform. The bottom end of each of the four screws 1 is fixedly connected to a motor power output end, the top end of each of the four screws 1 is threadingly connected to a corner of the support plate to extend to the outside, the two fixed plates are front and back symmetrically arranged at the top end of the support plate, an outer wall of the front fixed plate is provided with a fan and a controller, and an inner wall of the front fixed plate is provided with a temperature sensor. The new energy vehicle distribution box is provided with the shock absorbing mechanism, the damage to the distribution box due to a bumpy road in driving is reduced, the clamping plate for clamping is set, at the same time, a component group can be lifted, the maintenance and debugging by the staff are facilitated, and the working efficiency is improved.

The invention discloses a drilling device for home decoration, which comprises an operation table, the four corners of the lower end of the operation table are provided with shock absorbing devices, the upper end of the operation table is fixed with a storage box, and the storage box is equipped with a second A cavity, and both ends of the first cavity are connected through, a second driving device is fixed on one side of the storage box, the output shaft of the second driving device passes through the side wall of the first cavity and extends to In the first cavity, the end of the output shaft of the second driving device is fixed with a second screw, one end of the second screw is rotatably connected to the side wall of the first cavity, and the two ends of the first cavity are Two second screw rods are jointly fixed on the side wall. The invention solves the problem of inconvenient movement and inconvenient adjustment of the punching device through the transformation of the punching device for home decoration. At the same time, the position of the board can be adjusted, and the board can be flexibly clamped, which is convenient to use. Suitable for promotion.

The invention relates to a damping and supporting device of a concrete pump pipe, and belongs to the technical field of building construction. According to the damping and supporting device of the concrete pump pipe, a V-shaped rolling supporting assembly, a buffer spring assembly, side connecting rods and an underframe are arranged, downward acting force of the pump pipe is upwards acted on a buffer spring through a buffer shaft of the buffer spring assembly, mechanical energy of vibration of the pump pipe is effectively consumed through the buffer spring, a template and bottom binding rebarsare protected, construction quality is guaranteed, and noise generated by vibration is reduced; upper pressing plates are arranged, so that the pump pipe is effectively restrained from moving upwards; side spring rods are arranged, so that the damping and supporting device of the concrete pump pipe has better damping and anti-noise effects; and bottom plates and rubber plates are arranged, so that acting force from column bases is dispersed, and acting force from shock pulse of the pump pipe is further consumed.

The invention discloses a wear-resistant non-toxic modified plastic production method. The method comprises S1, preparation: weighing 40 to 45 parts of polypropylene, 30 to 35 parts of polyvinyl chloride, 25 to 30 parts of glass fibers, 15 to 20 parts of carbon fibers, 1 to 1.5 parts of a coupling agent, 10 to 15 parts of Teflon, 0.5 to 1 part of a lubricant and 5 to 7 parts of low density polyethylene, S2, blending: adding the weighed materials into a mixer and carrying out full mixing and grinding, S3, extrusion: putting the fully mixed materials into a twin-screw extruder and carrying out extrusion, S4, cooling: putting the molded plastic into a cooling room and carrying out cooling, S5, dry air drying: carrying out dry air drying and cooling on the product obtained by the step S4 through a dry air machine, S6, grain-sized dicing: putting the product obtained by the step S5 into a pelletizer and carrying out grain-sized dicing, and S7, vulcanization: carrying out vulcanization on the particles in a press vulcanizer. Through filling modification of polypropylene and polyvinyl chloride, the wear resistance of the modified plastic is greatly improved, good thermal performances areobtained, environmental friendliness is obtained and toxicity is avoided.

The invention discloses a pipe cutting and processing device. The pipe cutting and processing device comprises a base, wherein scales are arranged at the top of a workbench, a fixing tooth is fixedlyconnected to the top of the workbench, a sliding tooth is fixedly connected to the working end of a first electric telescopic rod, a movable rod penetrates through the top of a shock absorption frame,a movable plate is fixedly connected to one end, located in the shock absorption frame, of the movable rod, a first spring is fixedly connected between the bottom of the movable plate and the bottomof the inner wall of a damping frame, a top frame sleeves the top end of the movable rod, the movable plate is fixedly connected to one end, located in the top frame, of the movable rod, a second spring is fixedly connected between the top of the movable plate and the top of the inner wall of the top frame, and a spring steel plate is fixedly connected to the bottom of the outer frame. The invention relates to the technical field of cutting. According to the pipe cutting and processing device, the effects of accurate cutting and buffering and damping are achieved, the structure is simple, theuse is convenient, the manual labor is reduced, and the cutting quality and efficiency are improved.

The invention discloses multiple damping protection type medium adsorption type decoration engineering material crushing equipment. The equipment comprises a top anti-ejection type crushing assembly, an embedded damping shock absorption screening assembly, an impact type medium adsorption type dust suppression and collection assembly and a lifting and conveying assembly. The invention belongs to the technical field of building material decoration, and particularly relates to multiple damping protection type medium adsorption type decoration engineering material crushing equipment which is high in reliability, environmentally friendly and wide in application range. The buffering and damping effects of the buffering movable plate are improved through repulsive force between the first permanent magnet and the second permanent magnet, flexible blocking of splashing fragments is achieved in the brittle decoration material crushing process under the condition that no driving unit or sensor exists, the materials are rapidly crushed, meanwhile, the splashing fragments are prevented from damaging equipment, and the service life of the equipment is prolonged. And workers are accidentally injured.

The invention discloses a LDPE (low-density polyethylene) foaming heteromorphic material and a preparation method thereof. The LDPE foaming heteromorphic material comprises the following components in parts by mass: 90-100 parts of LDPE, 3-6 parts of a nucleator, 1-2 parts of a foaming agent, 0.1-0.5 part of an antisbrinking agent, 2-6 parts of polyethylene wax, 0.1-1 part of zinc oxide, 0.01-0.05 part of color master batches, 0.01-0.05 part of an antistatic agent, 0.01-0.05 part of an antiager and 0.01-0.05 part of a flame-retardant agent. The LDPE foaming heteromorphic material disclosed by the invention is light, elastic and soundproof; the LDPE foaming heteromorphic material has the functions of favorable water resistance, favorable dampness resistance, favorable flame retardancy, favorable static electricity resistance and favorable stretch resistance, and the LDPE foaming heteromorphic material can disperse external impact force so as to achieve the effects of buffering and shock absorption.

A fixing device for cable laying disclosed by the present invention comprises a mounting base, fixing holes and wire clamping devices, the fixing holes are formed in the two corresponding sides of the bottom edge of the surface of the mounting base, and the wire clamping devices are arranged at the top of the mounting base and are uniformly distributed at the top of the mounting base. The bottom of a limiting device is fixedly connected with the top of the mounting base, the bottom end of a connecting stud is fixedly connected with the position, close to the end, in the limiting device, a pressing device is connected to the top of the limiting device in a matched manner, and the pressing device and the connecting stud are connected in a matched manner and are fixed through a nut. The invention relates to the technical field of power construction devices. According to the fixing device for cable laying, the anti-vibration effect is achieved, the cable can be flexibly fixed and is not prone to being affected by a current magnetic effect, the vibration amplitude is effectively reduced, abrasion to a cable is reduced, the service life is prolonged, and the use performance is improved.

The invention discloses a corn straw pulverizer having damping effect and dedusting effect. The corn straw pulverizer comprises a base, a damping device is fixedly connected on each of two sides of the bottom of the base, a cabinet is fixedly connected at the top of the base, a feeding port is arranged on one side of the top of the cabinet, a partition is arranged inside the cabinet, an exhaust fan and a motor are fixedly connected sequentially on one side of the inner wall of the cabinet from top to bottom, and an air incoming pipe of the exhaust fan penetrates the partition and extends to one side of the same while an air outgoing pipe of the same penetrates the cabinet and extends to the outer side of the same. By arranging the damping devices and adopting structural design of a dampingshell, an extensible rod, a supporting plate, a supporting column, a transverse plate, a supporting seat, a support, a roller, a resetting spring and a buffering spring, buffering and damping effectis realized when the pulverizer works, pulverizing effect is improved, and influence of violent shaking on a pulverizer body is avoided.

The invention relates to the technical field of power generators, and discloses a power generator good in noise reduction performance. The power generator comprises a bottom plate fixedly installed onan automobile cylinder body, and a moving plate fixedly connected to the upper surface of the bottom plate; two installation frames are fixedly connected to the upper surface of the moving plate andfixedly connected with the same power generator main body through bolts; the upper surface of the bottom plate is fixedly connected with the lower surface of the moving plate through a plurality of buffering devices which are the same in structure; each buffering device comprises a buffering barrel fixedly connected to the upper surface of the bottom plate, the outer wall of the buffering barrel is movably sleeved with a sleeve fixedly connected with the lower surface of the moving plate, the upper surface of the buffering barrel is provided with a first through hole, and a moving rod fixedlyconnected with the moving plate is movably connected into the first through hole in a sleeved mode. According to the power generator good in noise reduction performance, shock and noise reduction canbe efficiently achieved, the driving comfort level of a person in an automobile is improved, the orientation of the power generator main body can be conveniently adjusted, and power generator main body installing is facilitated.

The invention discloses a power cable laying device. The power cable laying device comprises a base, an adjusting mechanism is arranged above the base, the adjusting mechanism comprises a mounting block and a balance plate rotationally connected to the mounting block, the bottom of the balance plate is conical, and a V-shaped closed sliding groove is further formed in the balance plate. Two firstelectrode plates which are not in contact with each other are arranged at the two ends of the sliding groove separately, two second electrode plates which are not in contact with each other are arranged at the bottom of the sliding groove, and a metal ball capable of freely rolling in the sliding groove is further arranged in the sliding groove. Electric telescopic rods corresponding to the firstelectrode plates on the side are arranged on the two sides of the bottom of the balance plate. A locking mechanism is arranged at the joint of the balance plate and the mounting block. Compared with atraditional device, the power cable laying device is higher in stability.

The invention relates to the technical field of lithium-ion power battery life testing, and specifically relates to a lithium-ion power battery life testing device. The device comprises battery life testing equipment and a bottom plate, wherein the upper end face of the bottom plate is equipped with support blocks, the lower side of the bottom plate is provided with shock-absorbing seats and shock-absorbing inner rods, the shock-absorbing inner rods are connected to the lower end face of the bottom plate, each shock-absorbing inner rod passes through the top wall of the corresponding shock-absorbing seat and is slidably connected with the shock-absorbing seat, the bottom end of each shock-absorbing inner rod is connected with a sliding plate, the sliding plate is located in the shock-absorbing seat, the sliding plate is slidably connected with the inner wall of the shock-absorbing seat, the lower side of the sliding plate is provided with a second spring, one end of the second spring is connected to the sliding plate, and the other end is connected to the bottom wall of the shock-absorbing seat. The lithium-ion power battery life testing device achieves an effect of buffering and absorbing the shock by using the up-and-down movement of the shock-absorbing inner rods and the sliding plates and the buffer of the second springs through the cooperation of the shock-absorbing innerrods, the shock-absorbing seats, the sliding plates and the second springs when the lithium-ion power battery life testing device is used.

The invention provides a cooling and damping sneaker which comprises a shoe sole and an upper. Antiskid blocks are arranged at the bottom of the shoe sole. The sneaker further comprises a damping mechanism. An air cavity is formed in the shoe sole. The damping mechanism is arranged in the air cavity. The lower end of the damping mechanism is fixed to the upper surface of the bottom layer of the shoe sole. The upper end of the damping mechanism abuts against the lower surface of the top layer of the shoe sole. A plurality of cooling air holes are formed in the top layer and make the air cavitycommunicated with a shoe inner cavity. The cooling air holes include the large air inlets and the small air inlets. Air flow in the air cavity can sequentially pass through the large air inlets and the small air inlets to enter the shoe inner cavity. An air inlet check valve is arranged on a heel part of the shoe sole and can make the air cavity communicated with a space outside the shoe, and airin the space outside the shoe flows from the space outside the shoe into the air cavity in one direction. The cooling and damping sneaker can effectively lower the environment temperature of the shoeinner cavity in the walking process and meanwhile has a good buffering and damping effect.

The invention discloses an elastically-contractible pet guy rope which comprises a pull ring, a metal lock hook and an elastic traction tube rope made of a PU material. The elastically-contractible pet guy rope is reasonable in structure and ingenious in design, is connected with a neck strap of a pet through the metal lock hook in a buckled mode and is convenient and firm to connect. In addition, the elastic traction tube rope has good elasticity and made of the PU material, so that a certain elastic pull space is reserved when pulling exists between the pet and a user, stress is slowly increased or decreased to achieve buffering-damping effect, the elastically-contractible pet guy rope is good in safety, the pet can be well controlled and only with slight strength and is not injured, and convenience is brought to people keeping the pet. In addition, the elastically-contractible pet guy rope is simple in whole structure, low in cost and easy to achieve.

The invention provides a damping device for a liquid storing tank. The damping device comprises a damping cylinder with the hollow interior. The first end of the damping cylinder is an opening end. The second end of the damping cylinder is a closed end. The first end of the damping cylinder can communicate with the interior of the liquid storing tank through a through hole in the tank wall of theliquid storing tank. A damping piston capable of sliding in the axial direction of the damping cylinder in a reciprocating manner is arranged in the damping cylinder. The periphery face of the dampingpiston is attached to the inner wall of the damping cylinder in a sealed manner. An elastic element capable of telescoping in the axial direction of the damping cylinder is arranged between the innerside end face of the second end of the damping cylinder and the damping piston. The two ends of the elastic element are connected with the inner side end face of the second end of the damping cylinder and the damping piston correspondingly. According to the damping device for the liquid storing tank, in the using process, the damping device communicates with the interior of the liquid storing tank through the through hole in the bottom of the liquid storing tank, by means of reciprocating vibration of the elastic element of the damping piston arranged in the damping cylinder, impact on the tank wall of the liquid storing tank by liquid can be effectively dissipated, the buffering and damping effects are achieved, and the safety and the service life of the liquid storing tank are ensured.

The invention discloses a household carpet with a reverse vibration-preventing function. The household carpet with the reverse vibration-preventing function comprises a body; a soft cushion layer, a damping layer and a ground contact layer which are arranged in the body sequentially from top to bottom; a damping clamping base is arranged in the damping layer; a vibrating ball matched with the damping clamping base is arranged in the damping clamping base; the vibrating ball comprises a ball body; a compression spring is arranged at the bottom of an inner cavity of the ball body; buffer springsare arranged on the two sides of the inner wall of the ball body; a bearing block is arranged at the top of each buffer spring; and the top of the bearing block is movably connected with two moving plates. The household carpet with the reverse vibration-preventing function achieves the buffering and damping effects, reduces damage to the carpet, saves the maintenance cost after the carpet is broken, reduces the economic burden of people and guarantees the beautiful appearance of the carpet and brings convenience for people's life; and the household carpet with the reverse vibration-preventingfunction is compact in structure, reasonable in design, high in applicability and convenient to popularize and use.

The invention discloses an elastic coupling for a spline shaft. The elastic coupling comprises a flange plate and a spline sleeve; a counter bore is formed in the flange plate; the spline sleeve consists of a plurality of annular metal sheets laminated together; the spline sleeve is tightly pressed in a sinking part of the counter bore by a pressing part, and is coaxial with the counter bore; and spline grooves are peripherally distributed in the inner wall of the spline sleeve. The elastic coupling has the technical effects of reduction of spline wear and capability of guaranteeing lower concentricity.

The invention discloses a metallic foil film processing device with a hot pressing function and relates to the technical field of plastic processing. The metallic foil film processing device with the hot pressing function comprises a base, wherein a controller is fixedly mounted on the right side of the top of the base; two brackets are fixedly mounted at the top of the base and located on the left side of the controller; a cross rod is fixedly mounted at the tops of the brackets; a vertical rod is fixedly mounted at the bottom of the cross rod and located between the two brackets; the bottom of the vertical rod is movably connected with a pulley through a rotating shaft. According to the metallic foil film processing device with the hot pressing function, a metallic foil film is extruded by improving a box body, so that the metallic foil film processing is convenient, convenience is brought to a user, the processing time of the metallic foil film is saved, and meanwhile, the processing quality of the metallic foil film is improved.

The invention relates to the technical field of digital electronics, and discloses a Bluetooth earphone capable of reminding in time when falling off in the using process. The earphone comprises a shell, buffer pads are evenly distributed on the outer side of the shell, ejector rods are movably installed in the buffer pads, the upper ends of the ejector rods are movably installed in an alarm device, a pressing plate is movably installed in the alarm device, the lower side of the pressing plate is fixedly installed at the upper ends of the ejector rods, and an air bag is arranged on the upper side of the pressing plate. Under gravity action, the buffer pad is compressed inwards, pushing the ejector rod to move. The ejector rod pushes the pressing plate. When the pressing plate moves towardsthe inner side, the rack in the tooth groove is driven to move towards the inner side, the gear engaged with the rack rotates synchronously, and the L-shaped connecting rod is driven to move in the rotating process of the gear, so that the electric induction head arranged at the upper end of the L-shaped connecting rod is in contact with the copper sheet, and the effect of timely alarming and reminding when the earphone falls onto the ground is achieved.

The invention discloses a steel fiber automatic feeding device comprising a base, an installing seat, a vibration absorption assembly, support legs, first longitudinal beams, a swing arm, a second longitudinal beam, a vibration frame and a sliding plate. The installing seat is arranged on the base and is connected with the base through the vibration absorption assembly. The support legs are arranged on the installing seat side by side. The second longitudinal beam is fixedly installed at the tops of the inner sides of the support legs. A transverse rod is arranged between the first longitudinal beams. The output end of a vibration motor is connected with a rotary disc. The top end of a connecting rod is rotationally connected with the transverse rod. The bottom face of a support plate is connected with the base through an elastic part. A sliding rod is sleeved with a first spring. The bottom end of the first spring is connected with the base. The top end of the first spring is connected with the installing seat. The inner walls of the left and right sides of the base are provided with cylinder bodies. Third springs are arranged in the cylinder bodies. The other ends of the third springs are connected with a movable plate. The top end of the connecting rod is movably connected with the support plate. The bottom end of the connecting rod is connected with the movable plate. The steel fiber automatic feeding device has the advantages that automatic feeding is achieved, the weight of feeding of each time can be controlled, and filtration and purification can be conducted.

The invention discloses a mobile electric energy simulator which comprises a simulator body, and a balance mechanism is arranged at the bottom of the simulator body. The balance mechanism comprises a balance plate used for placing the simulator main body and a V-shaped groove formed in the balance plate, a metal ball capable of freely moving in the V-shaped groove is arranged in the V-shaped groove, and two first electrode plates which are not in contact with each other are arranged on the circular end faces of the two ends of the V-shaped groove; the bottom of the V-shaped groove is provided with two second electrode plates, the two second electrode plates are arranged on the upper side and the lower side of the V-shaped groove along the central axis of the balance plate, and the two sides of the balance plate are provided with electric telescopic rods corresponding to the first electrode plates located on the two sides of the V-shaped groove. Compared with a traditional electric energy simulator, the position of the simulator body is kept vertically upward through the balance mechanism, and therefore the stability of the device in the movement process is guaranteed.

The invention discloses a pair of high-safety anti-static shoes. Each shoe comprises a shoe body, a sole, an insulating sole, an insulating layer, a spring, a conductive metal block, a copper wire anda metal sheet, traditional anti-static shoes are common in anti-static capacity and cannot effectively prevent generation of static electricity, and the soles are provided with conductive metal blocks, so that the soles are hard, the wearing comfort is not high, an operator is promoted to walk difficultly, and the shoes are very inconvenient to use. The pair of high-safety anti-static shoes are safe, comfortable, simple, practical and easy to apply and popularize.

The invention discloses a connecting part for a new energy automobile, and relates to the technical field of connecting parts for new energy automobiles, the connecting part for the new energy automobile comprises an anti-collision beam, an energy absorption box and a longitudinal beam connected to the energy absorption box through a connecting device, the connecting device comprises a shell, and a movable groove is formed in the shell; a first connecting block and a second connecting block are connected in the movable groove in a relative sliding mode, the first connecting block is used for connecting the energy absorption box and the shell, and a buckle part is arranged on the first connecting block. According to the device, the first check blocks are used for blocking the buckle parts through the spring force of the second telescopic columns so as to achieve the buffering and damping effect, the four buckle parts are arranged on the outer surfaces of the first connecting blocks correspondingly, and the four buckle parts are stressed to unload force to the four force unloading devices correspondingly; the force unloading devices can disperse impact force borne by the energy absorption box to the periphery, and a good buffering effect can be achieved.

The invention discloses a small intelligent cultivator. The small intelligent cultivator comprises a base, wherein wheels, a driving assembly, a braking assembly and a steering assembly are arranged at the bottom of the base, the steering assembly and the braking assembly are located on one side of the driving assembly correspondingly, a compartment is installed on the outer wall of the top of the base, and a control assembly is arranged on the outer wall of the top of the compartment; a supporting frame and a fixing block are welded to the outer wall of the top of the base correspondingly, a supporting plate is fixedly installed on the outer wall of the top of the supporting frame, and a plough rod is connected to the outer wall of the top of the fixing block through a bearing. Information is obtained through an industrial personal computer, an ultrasonic radar, a millimeter-wave radar, a laser radar, a binocular vision sensor and navigation positioning equipment which are arranged; through processing and calculation, a decision is made, an instruction is sent to a CAN line, the driving assembly, the steering assembly, the braking assembly, a lifting assembly and a swinging assembly, instruction information is obtained from the CAN line, and corresponding actions are executed, so that unmanned intelligent ploughing is achieved, labor is saved, and agricultural development is promoted.

The invention discloses a stamping device with a buffer structure. The stamping device comprises a machine tool, a supporting frame is connected to the left side of the machine tool, an electric control box is connected to the left side of the supporting frame, a fixing base is connected to the top of the right side wall of the supporting frame, an air cylinder is connected to the bottom of the fixing base, the bottom of the air cylinder is connected with an upper die base, and a pressing column is connected to the bottom of the upper die base; the top of the machine tool is connected with a workbench, the top of the workbench is connected with a lower die base, and the lower die base is located under the upper die base. The stamping device with the buffer structure is reasonable in structural design and easy to operate, a workpiece can be continuously punched, a pressing block descends along a buffering cavity to extrude buffering liquid, a concave part on an inner pipe is extruded outwards to slightly deform, meanwhile, a protruding part of a reinforcing hoop deforms due to outward abutting and pressing of the inner pipe, inward tightening force is generated, the tightening force can counteract part of liquid pressure, a good buffering effect can be achieved, damage to stamping equipment and a die is avoided, and the service life of the device can be prolonged.