107results about How to "The structure is easy to disassemble" patented technology

An integrated internally supported hub motor electric wheel is disclosed, and includes tyres, hubs, hub motor, -a honeycomb structure inn support body, a brake and a vibration damping mechanism-, wherein the hub motor comprises an outer rotor shell integrating a hub and a brake connecting disk, an outer rotor composed of a rotor yoke and a permanent magnet, an inner stator and a stator support frame, wherein the rotor yoke and the permanent magnet are attached to the inner side of the rim, and the brake connecting disk and the rim are fixedly connected by bolts; The hollow inner stator is connected with a suspension sleeve through a stator support frame, and the suspension sleeve is respectively connected with a knuckle arm and a wheel support shaft through an elastic element; The inner support is a sectional arc honeycomb structure, which plays a supporting and cushioning role under low pressure or zero pressure driving conditions. compared with that prior art, The invention has the advantages of simple and compact structure, high transmission efficiency, easy arrangement and installation, and the like, reduces the unsprung load mass, effectively improves the dynamic characteristics of the electric vehicle wheel, and embeds the inner support body, effectively avoids the influence of the road excitation on the performance of the hub motor under the low-pressure or zero-pressuredriving condition, and ensures the safe continuation of the deflated wheel.

The invention discloses a radial rotary sealing device for magnetic liquid and belongs to the field of mechanical engineering sealing. By means of the radial rotary sealing device for the magnetic liquid, the problems that when an existing sealing device is in use, it is difficult to add or replace magnetic liquid, and machining accuracy and assembly accuracy are too high due to the fact that the axial length is large are solved. According to the sealing device for the magnetic liquid, radial sealing is adopted, the axial dimension is reduced by increasing the radial dimension, a first magnetic disc is connected with a shell through screws, and detachment is convenient. Moreover, the invention provides a novel mode for designing the rotary sealing device for the magnetic liquid.

The invention discloses a reflector adjusting device. The reflector adjusting device comprises a reflector, a reflector carrier, multiple adjusting clips, an optical engine lower shell, multiple adjusting springs and multiple adjusting screws, wherein the reflector is fixed to the front side of the reflector carrier, multiple screw columns are arranged on the back side of the reflector carrier, one end of each adjusting clip is clamped and connected to the reflector carrier, the other end of each adjusting clip is fixed to the optical engine lower shell, multiple adjusting screw holes corresponding to the screw columns are formed in the optical engine lower shell, multiple spring grooves surrounding the adjusting screw holes are formed in the back side of the optical engine lower shell, the adjusting screws penetrate through the adjusting screw holes and are connected with the screw columns of the reflector carrier, the adjusting springs surround screw rods of the adjusting screws, one end of each adjusting spring abuts against the corresponding spring groove of the optical engine lower shell, and the other end of each adjusting spring abuts against a screw cap of the corresponding adjusting screw. By the adoption of the reflector adjusting device, the position and / or angle of the reflector can be adjusted conveniently.

The invention discloses a simulation test system and a test method for coal stratum gas dynamic permeability improvement seepage and displacement, which comprise a fluid injection system, a model sealing loading system and a data acquisition, processing and control system. The simulation test system and the test method for coal stratum gas dynamic permeability improvement seepage and displacementcan achieve the function of injecting fluid (gas, steam and liquid) into large-scale coal and rock bodies under different loads, can be used for simulating permeability improvement measures such as coal seam hydraulic fracturing, hydraulic cutting, blasting cracking and the like, can be used for simulating coal seam gas increasing measures such as gas injection, heat injection and the like, can monitor physical quantities such as fluid flow, pressure, solid stress, strain, temperature and the like in the coal and rock bodies in real time, and can find out multi-field coupling evolution rules such as a gas pressure field, a stress field, a deformation, a temperature field and the like in the fluid seepage process under the conditions of pressure bearing and pressure relief. The whole systemhas the advantages of simple structure, clear division of labor and convenient disassembly and assembly, can provide test parameters for permeability improvement and production improvement technologies such as hydraulic fracturing, hydraulic cutting, blasting cracking, gas injection, heat injection and the like, and can provide a verification platform for theoretical research.

The invention provides a transverse sealing mechanism used on a pillow type packaging machine and the pillow type packaging machine, belongs to the technical field of packaging machines, and solves the problems that the existing packaging machine is low in packaging speed and inconvenient to dismantle and maintain. The transverse sealing mechanism comprises a bracket, a transverse sealing upper shaft, a transverse sealing lower shaft, two support plates and a drive mechanism, wherein each of the support plates comprises a floating plate and a fixed plate; an upper sealing wheel provided with upper sealing knife structures and a lower sealing wheel are fixedly arranged on each of the transverse sealing upper shaft and a transverse sealing lower shaft in a sleeving manner; the transverse sealing upper shaft and the transverse sealing lower shaft are connected with the drive mechanism through a transmission mechanism; and a hinge block structure and an adjusting block are arranged between the floating plate and the fixed plate of each of the support plates. The transverse sealing mechanism has the advantages of high convenience in dismantling and maintaining and high packaging speed.

The invention discloses a throwing type two-wheel reconnaissance robot. The throwing type two-wheel reconnaissance robot adopts a split structure, and the gravity center deviates to one side. The throwing type two-wheel reconnaissance robot comprises elastic wheels, a shell assembly, a lower sealing cover, a balance tail, infrared lamps, a pickup, a camera, motor gears, wheel shafts, shaft gears, end covers, motors, a main control board, a power supply, a data radio and an image radio. The throwing type two-wheel reconnaissance robot has the following beneficial effects: the throwing type two-wheel reconnaissance robot adopts the split structure, so that the structure disassembly and installation are convenient; all devices inside can be inspected only by dismounting of the shell; and the gravity center of a whole vehicle body deviates to the second shell side, when the robot performs an overturning action, quick overturning can be realized by full use of self inertia.

Disclosed in the invention is a mounting bracket of a network base station antenna. The mounting bracket comprises a pole; and a connection sleeve is connected to the pole in a rotation manner and is fixed connected to the pole by a positioning bolt. A substrate is installed on the connection sleeve; a first connecting rod is connected to the top of the substrate in a sliding manner; one end of the first connecting rod is hinged to a second connecting rod; the other end of the second connecting rod is hinged to a third connecting rod; an upper connection base is installed at the end portion of the third connecting rod; a fourth connecting rod is connected to the bottom of the substrate in a sliding manner; a fifth connecting rod is hinged to the end portion of the fourth connecting rod; and a lower connection base is installed at the end portion of the fifth connecting rod. The mounting bracket has a novel structure; the angle of the mounting structure can be adjusted and the height of the bracket can be adjusted slightly up and down; and thus the mounting bracket is suitable for mounting antennas with different sizes with high adaptability. The connection sleeve is connected to the pole in a rotating manner, so that rotation becomes convenient and the angle is adjusted conveniently; and after adjustment completion, the bracket is fixed by the positioning bolt. Moreover, the mounting bracket is mounted or dismounted conveniently and the practicability is high.

The invention discloses a lead type thermocouple piston surface temperature measurement connecting rod lead structure. The structure includes a first connecting block connected with a large head end of an engine connecting rod, the first connecting block is connected with a second hinge block, the second hinge block is hinged to a third hinge block, and the third hinge block is connected with a fourth hinge block through a first connecting rod; the fourth hinge block is hinged to a fifth hinge block, and the fifth hinge block is connected with a sixth hinge block through a second connecting rod; and the sixth hinge block is hinged to a seventh hinge block, and the seventh hinge block is fixedly connected to a rack through an eighth connecting block. The lead type thermocouple piston surface temperature measurement connecting rod lead structure has the beneficial effects that up-and-down motion of a thermocouple wire is changed into swing, and the structure is convenient to assemble and disassemble; a change of piston temperature can be measured, and the measured piston temperature is high in accuracy; the cost is low; and the structure can operate at a high speed.

The invention relates to a freely suspended adjustable locking device for a dial of a computer seamless underwear knitting machine, which belongs to the technical field of underwear machines. The device comprises a machine head aluminum seat, a synchronous belt pulley, a Huff dial, a Huff dial fixing seat and a Huff-pin triangular fixing dial, wherein the synchronous belt pulley, a Huff dial driving shaft, the Huff dial fixing seat and the Huff dial are connected integrally and are freely suspended on the machine head aluminum seat; an installing hole of the machine head aluminum seat is provided with a tension assembly for positioning the synchronous belt pulley in an axial direction; an adjustment positioning shaft sleeve is sleeved on the lower end of a needle roller bearing seat; the barrel body of the adjustment positioning shaft sleeve is provided with two limiting blocks; the machine head aluminum seat is provided with an upper adjusting bolt and a lower adjusting bolt; and the Huff-pin triangular fixing dial is connected with the Huff dial seat through a small plane bearing. The device meets the requirements on convenient adjustment of up and down movement of the Huff dial and the knitting aiming at different textiles at the same time, and can realize further fine adjustment; and the Huff dial is convenient to install, adjust and maintain because of the adoption of a freely suspended mode with a locking function.

The invention provides a door frame structure with a detachable doorsill. The door frame structure comprises a door frame, the doorsill, inserting holes, inserting pieces and set screws. The doorsill and the inserting pieces can be dismounted from the door frame or mounted on the door frame, the inserting holes which are completely the same as the cross section of a cavity in the doorsill in size and specification are formed in the doorsill positions of the bottom ends on the left side and the right side of the door frame, the inserting pieces are rightly inserted into the inserting holes, the doorsill is mounted on the inserting pieces and is clamped, and the doorsill can be locked by the set screws. The door frame structure with the detachable doorsill has the advantages that the doorsill of the structure can be quickly dismounted and mounted according to needs, and is convenient, practical and particularly suitable for public places such as offices, laboratories, classrooms and the like. At ordinary times, the doorsill is in a mounting state and achieves a normal safety and reinforcing effect. When a floor is cleaned, a cart is used for conveying heavy objects and other special demands need to be met, the doorsill can be dismounted to enable the floors in a room and outside the room to be communicated without obstacles, cleaned objects are directly cleaned out of the room, or the heavy objects can be stably pushed into the room by the cart.

The invention discloses a high-speed gearbox thrust disc structure. The high-speed gearbox thrust disc structure comprises a high-speed gear shaft and a driving gear. The high-speed gear shaft comprises a gear part engaged with the driving gear, and shaft shoulder parts located on the two sides of the gear part. An annular clamping groove is formed between the gear part and each shaft shoulder part. A check ring is sleeved with each annular clamping groove. Each check ring is sleeved with a thrust disc. The driving gear makes fact contact with one side of each thrust disc so that a thrust facecan be formed. The radial and axial size of the thrust disc structure is small, the structure is compact, and stable rotation of a high-speed shaft is facilitated; and when vibration is measured at the shaft neck position of the high-speed gear and the rotation speed reaches 30,000 r / min, the axial vibration is smaller than or equal to 0.015. According to the thrust disc structure, the componentstructure is simple, the manufacturing cost is low, the gear axial gap can be reliably guaranteed, and playing during work is avoided.

The invention provides a stirring device for barreled water barrel production. The stirring device comprises a barrel body and a barrel cover, wherein a hopper is arranged on the barrel cover; the bottom of the barrel body is downwards projected to form a blanking groove; the lower inclined end of the blanking groove is opened to form a discharging opening; a plugging structure is arranged at theouter side of the discharging opening; a first spiral stirring shaft is arranged in the blanking groove; a vertically arranged electric heating stirring structure is arranged in the barrel body, and comprises a rotating pipe; the bottom side wall of the rotating pipe communicates with at least two branch pipes; the top of one end, far away from the rotating pipe, of each branch pipe is provided with a vertically arranged heat conduction pipe; an electric connection seat is arranged in a communicating position of the heat conduction pipe and the branch pipe; an electric heating pipe is arrangedinside the heat conduction pipe; the bottom end of the electric heating pipe is electrically connected with the electric connection seat; the electric connection seat is electrically connected with the outside; the rotating pipe and the first spiral stirring shaft are driven by a driving motor. The stirring device can be used as a feeding device of an extruding machine; the feeding is accelerated; the blockage is effectively prevented; in addition, plastic particles can be preheated; the subsequent melting is convenient; and the production efficiency is improved.

The invention discloses a thermal safety control battery module structure, which comprises a battery module shell and at least two single batteries located in the battery module shell, wherein a partition plate of a honeycomb structure and a fireproof plastic net are arranged between every two adjacent single batteries, the battery module shell comprises an upper cover plate, a bottom plate, two first side plates and two second side plates, and heat dissipation grooves are formed in the inner sides of the bottom plate, the upper cover plate and the first side plates. According to the invention, six degrees of freedom of the whole single battery group in space are limited, the tensioning is effective, and the structure is compact; due to the arrangement of the partition plates with the honeycomb structure, the transmission of heat between the single batteries is isolated, and an efficient heat dissipation effect is achieved; according to an indentation structure of the upper cover plate, directional explosion spraying during thermal runaway of the battery module can be realized by setting indentation opening pressure, so that rapid pressure relief is realized, and the hazard of explosion is effectively reduced.

The invention relates to a bearing installation machine and belongs to the technical field of mechanical tools. The bearing installation machine comprises a sliding groove seat, a supporting seat, a fixing plate, a triangular rack, a baffle, a supporting stand, a lifting table, a hydraulic sliding block, an abutting block, a lead screw, an electric nut post and a bearing. According to the size of the bearing and the distance between the center of a bearing hole of the bearing and the bottom face, the height of the lifting table is accurately adjusted through a laser ranging device and the electric nut post firstly. According to the bearing installation machine, the overall structure is simple, the center position of the bearing can be well located through an arc-shaped abutting head of the abutting block and the laser ranging device, the bearing can be stably placed on a bearing seat through the bearing abutting head, and the installation precision is guaranteed; a lifting device is suitable for bearing seats of various sizes, and adjustment is accurate and convenient; and the whole structure is convenient to assemble and disassemble and easy to manufacture.

The invention discloses a fixing device of an assembly type precast plate. When fixing the precast plate, firstly a first plate and a second plate are inserted and matched through an inserting connection assembly, and then a fixed seat is fixed to the first plate and the second plate through fastening bolts, a first connecting rod and a second connecting rod are installed on the fixed seat in a cross mode, the fixed connection of the first plate and the second plate is realized by using the inserting connecting assembly and a fixed assembly. The height from the upper end surface of a locking nut to the first plate and the second plate is a first height, the lowest height from the first connecting rod and the second connecting rod to the first plate and the second plate is a second height,the lowest height from a nut to the first plate and the second plate is a third height, and the order of size of the three heights is the first height, the second height and the third height in sequence. According to the fixing device of the assembly type precast plate, when the nut is loose, the locking nut can further limit the nut to prevent the nut from falling, and the stability of the connection is further ensured.

The invention relates to a multi-layer support bent frame system parking lot. The parking lot comprises bent frame columns, internal slope lanes and parking units, wherein parking floors are formed by superposing the parking units floor by floor from top to bottom and arranged side by side; the parking units among adjacent parking floors are arranged in a staggered mode in the height direction; each parking unit comprises a composite beam; the upper surface of a floor plate of the composite beam is provided with parking spaces and running lanes; the bent frame columns are transversely arranged in rows at intervals; two rows of bent frame columns are hinged with steel beams at two ends of the composite beam; the internal slope lanes are arranged among adjacent parking floors; the low side of each internal slope lane is positioned on the parking unit of the parking floor on one side, and the high side of each internal slope lane is positioned on the parking unit which is adjacent to andhigher than the parking unit of the parking floor on one side; and the parking unit on the bottommost layer is provided with an entrance and exit. The parking lot is flexibly configured, low in construction cost, long in service life, convenient to expand and high in secondary utilization rate.

The invention discloses a steel rolling workpiece cooling device, and belongs to the technical field of steel rolling cooling equipment. The steel rolling workpiece cooling device is used for coolinga steel rolling workpiece, according to the technical scheme, a base is arranged below a steel rolling conveying belt, two side protecting plates are located on the two sides of the steel rolling conveying belt respectively, the lower ends of the two side protection plates are vertically connected with the base, the upper ends of the two side protection plates are connected with the bottom of thewater tank, a plurality of drainage grooves which are arranged in parallel and are discharged downwards are formed in the steel rolling conveying belt between the two side protection plates, the innerwall of the base is fixedly connected with a flow guide tank, the upper end of the flow guide tank is opposite to a drainage groove in the steel rolling conveyor belt, the bottom of the flow guide tank is fixedly connected with the upper end of the water storage tank, the bottom of the water storage tank is connected with the water pump, the water pump is connected with the water tank through a water delivery pipe, a plurality of cooling pipes are arranged on the bottom surface of the water tank, and a plurality of high-pressure atomizing nozzles are respectively arranged on the cooling pipes. So that the quality of the product is ensured, the cooling water can be recycled, so that the utilization rate of the cooling water is improved.

A household multifunctional integrated machine comprises a power device, a function device, a power shaft connector and fixing connectors. The power device is connected with the function device by the fixing connectors. The power shaft connector comprises an output shaft, a pressing device, a disc and an extending shaft. The output shaft is arranged on the power device of the multifunctional integrated machine, the extending shaft is arranged on the function device, the power device is transmitted to the function device through the power shaft connector, the function device comprises a power shaft conversion device and a function head, the extending shaft is connected with the power shaft conversion device, and the power shaft conversion device is connected with the function head. The household multifunctional integrated machine is simple in structure and convenient to demount and mount, replacement of different function heads can be completed without professional knowledge, and use is facilitated.

The invention discloses a processing device for extracting traditional Chinese medicine components and an operation method thereof.The processing device comprises two lifting structures, an extracting and processing structure is movably connected between the two lifting structures, and the two sides of the extracting and processing structure are fixed to the two lifting structures through rotating structures; wherein an operation panel is fixedly installed on the outer side of one lifting structure, power boxes are fixedly installed on the outer sides of the two lifting structures, and the two sides of the two lifting structures are fixed through supporting bases. Through cooperation of the rotating structure and the extracting and processing structure, a lower tank body can be overturned and supported, so that after the device finishes stirring and extracting, the lower tank body can be inclined, liquid is poured out, material pouring and collecting are more convenient, the material taking-out time is saved, the operation steps are reduced, meanwhile, manual interference operation is avoided, and the whole device is more convenient to operate.

The invention discloses a rapidly assembled and disassembled drone undercarriage structure. The rapidly assembled and disassembled drone undercarriage structure is composed of a main undercarriage, afront undercarriage, a first quick release pin and a second quick release pin; a drone body connector is fixedly connected with a drone body, and a main undercarriage connector is fixed at the upper end of the main undercarriage; a front undercarriage-drone body support column is connected with the drone body, one end of a front undercarriage support rod is connected with the front undercarriage,and the other end of the front undercarriage support rod is embedded inside the front carriage-drone body support column and connected through a quick release pin. When a drone is expanded, a main undercarriage connector is inserted into the lug of the drone connector and connected with the drone body connector through a quick release pin; after the front undercarriage support rod is inserted intothe front undercarriage-drone body support column. When the drone is withdrawn, the first quick release pin and the second quick release pin are pulled up to achieve separation of the front undercarriage and the main undercarriage from the drone body. The rapidly assembled and disassembled drone undercarriage structure is convenient to assemble and disassemble, and by designing modular parts, achieves simple operation and greatly reduces the time for flight preparation and withdrawal.

The invention discloses a visual filter capable of automatically blowing gas and a filtering method thereof. The filter comprises a filtering diaphragm, a filtration chamber and a sample gas chamber, wherein the filtering diaphragm is installed in a main cavity, the filtration chamber and the sample gas chamber are separated on the two sides of the filtering diaphragm; the edge of the filtering diaphragm is provided with a seal ring; one end of the main cavity is an opening; the middle of a bottom plate on the other end is inserted with an outlet nozzle communicated with the sample gas chamber; a branch block, the filtering diaphragm, an inner cover, a glass window and a junk ring are successively installed from the bottom plate of the main cavity to the opening in the main cavity; the sample gas chamber is surrounded by one side of the filtering diaphragm, the bottom plate of the main cavity and the branch block; and the filtration chamber is sounded by the other side of the filtering diaphragm, the inner cover and the glass window. The invention is suitable for the rear end of sample gas processing; and sample gas is used before entering an on-line analyzer to obtain the purposes of dedusting and dehydrating, and the sample gas obtains high quality approaching to that of the standard gas.

The invention discloses a shell structure for a liquid-flow single battery system. The shell structure for the liquid-flow single battery system comprises a positive electrode frame, a negative electrode frame, a membrane frame, a positive electrode plate, a negative electrode plate and two O-type seal rings, wherein the axes of the positive electrode frame, the negative electrode frame, the membrane frame, the positive electrode plate, the negative electrode plate and the O-type seal rings are located on a same horizontal straight line, the positive electrode frame, the negative electrode frame, the membrane frame, the positive electrode plate and the negative electrode plate are sequentially overlapped in the specified direction, the positive electrode plate is fixed inside the positiveelectrode frame, and the negative electrode plate is fixed inside the negative electrode frame; one O-type seal ring is arranged between the positive electrode plate and the membrane frame, and the other O-type seal ring is installed between the negative electrode plate and the membrane frame; the positive electrode frame and the negative electrode frame are fixed to the membrane frame in an extruded-sealed manner through the two O-type seal rings. The shell structure for the liquid-flow single battery system has good sealing performance, the energy density of the single battery system is effectively improved, the whole structure is simple and easy to disassemble, and the shell structure is suitable for liquid-flow battery performance research.

The invention relates to a vertical drilling assistor for a wind tunnel test model. The vertical drilling assistor is used for assisting an electric drill to drill a to-be-drilled object; the vertical drilling assistor comprises a base, a fixture and a plurality of telescopic rods arranged in parallel; one end of each of the plurality of telescopic rods is vertically and detachably connected to one side of the base, and the other end of each of the plurality of telescopic rods is detachably connected to the fixture; the fixture is used for clamping the electric drill, and a drill bit of the electric drill extends towards a direction close to the base and is parallel to the telescopic rods; and the other side of the base is pressed on the to-be-drilled object, and a through hole allowing the drill bit to move back and forth to drill the to-be-drilled object is formed in the base. Due to the arrangement of the detachably-connected telescopic rods, the requirements of drill bits with different lengths can be met by regulating the heights of the telescopic rods as required; and the vertical drilling assistor is convenient to dismount and mount, convenient to carry and capable of vertically and downwards drilling the to-be-drilled object.

The invention discloses a suspension type car anti-impact seat. The suspension type car anti-impact seat comprises a vertical stand column fixed to a bottom plate of a compartment, a horizontal supporting rod fixed to the stand column, a seat body with a backrest being hinged to the end of the supporting rod, a pair of top pulleys fixed to the inner top wall of the compartment, bottom pulleys fixed to the bottom plate of the compartment, a hoisting rope and a tensioning rope. One end of the hoisting rope is fixed to one end of the top of the backrest of the seat body and sequentially winds across the pulleys, the other end of the hoisting rope is fixed to the other end of the top of the backrest of the seat body, and the hoisting rope is tensioned. The bottom of the tensioning rope is connected with the bottom plate of the compartment, and the top of the tensioning rope is fixed to a cushion of the seat body and tensions the cushion of the seat body downwards. The hoisting rope sequentially winds across one top pulley, the bottom pulleys and the other top pulley. The suspension type car anti-impact seat can effectively relieve injury to the bodies of passengers in the compartment when a car is impacted in a landmine explosion accident.

The invention belongs to the technical field of a brake, and particularly relates to a hydraulic braking system used for a storage battery car, a motorcycle and a bicycle with relatively high speed. The hydraulic braking system comprises a braking plate, a braking mechanism and a driving mechanism, wherein the driving mechanism comprises a pull rope, a driving rocker arm and a pressure oil cylinder; the upper end of the driving rocker arm is connected with the pull rope, and one side of the lower end of the driving rocker arm is abutted against a pressure piston of a pressure oil cylinder; the braking mechanism comprises a braking clamp body fixedly arranged on a car frame, a friction sheet arranged on the braking clamp body, a braking oil cylinder arranged inside the braking clamp body and used for driving the friction sheet, an electromagnet used for controlling the braking piston inside the braking oil cylinder to do reciprocating motion, and a triggering device used for controlling the electromagnet to be switched on and off; the pressure oil cylinder is communicated with an oil cavity of the braking oil cylinder through an oil pipe. The hydraulic braking system provided by the invention can be used for repeatedly clamping and releasing for multiple times by pulling the pull rope again and again, so that the braking distance is reduced, and the driving security is improved on the premise of reducing the labor intensity of operators.

A double-headed arrow type negative poisson ratio structural body relates to the structural body field of space lattice structures, and includes a double-headed arrow type negative poisson ratio structural unit, wherein the double-headed arrow type negative poisson ratio structural unit includes an upper cross beam, a lower cross beam, a first upper diagonal bar, a second upper diagonal bar, a first lower diagonal bar, a second lower diagonal bar, a first middle diagonal bar and a second middle diagonal bar; a first upper connecting base, a second upper connecting base, a first lower connecting base and a second lower connecting base are respectively arranged at the lower ends of the first upper diagonal bar, the second upper diagonal bar, the first lower diagonal bar and the second lowerdiagonal bar, so as to form the double-headed arrow type negative poisson ratio structural unit; in space, the double-headed arrow type negative poisson ratio structural unit adopt the first upper connecting base, the second upper connecting base, the first lower connecting base, the second lower connecting base, the upper cross beam and the lower cross beam as connecting pieces for combined connection to form the double-headed arrow type negative poisson ratio structural body with the stereostructure. The double-headed arrow type negative poisson ratio structural body has the advantages of simple structure, high stability, light weight in unit space, high compression resistance, high impact resistance, and the like.