37results about How to "Adjustable compression" patented technology

The invention discloses an embossing apparatus for a garment material. The embossing apparatus comprises a feeding mechanism, an embossing mechanism, a material recovering mechanism and a drying mechanism, wherein the feeding mechanism comprises a feeding rack, a feeding roll, a feeding cylinder, a storage bin, a pressing and conveying assembly and a conveying roll; the embossing mechanism comprises an embossing frame, an embossing shaft, an embossing motor, an end plate, a station plate, a first embossing roll, a second embossing roll, a third embossing roll, a fourth embossing roll, a lower embossing roller, a conveying roller, a shell cover and a hot steam nozzle; the lower embossing roller is provided with concave patterns respectively matching with a first convex pattern, a second convex pattern, a third convex pattern and a fourth convex pattern; and the drying mechanism comprises a drying rack, a cold-air drier, a drying roller and an auxiliary roll. The embossing apparatus provided by the invention is simple to operate, high in an automation degree, capable of pressing complex and changeable patterns on fabrics, good in embossing quality and high in embossing efficiency.

The invention particularly relates to a combined mechanical seal device which comprises a moving ring, a static ring assembly, a static ring housing, a floating ring assembly and an O-shaped rubber ring. The static ring assembly is arranged in the static ring housing and comprises an end face block assembly, a rotation-preventing pin, a spring and a damping belt. The end face block assembly comprises a static ring, a static ring seat, a film box assembly and a rear ring which are arranged in sequence. The damping belt is located in an annular groove of the inner surface of the static ring housing. The floating ring assembly comprises a floating ring, a cover plate and a floating ring housing, wherein the floating ring penetrates through a rotor to be arranged in the floating ring housing, and a cover plate penetrates through a rotor to be fixedly arranged on two sides of the floating ring housing respectively. A cooling backflow channel comprises a bearing axial gap, a gap between the moving ring and a pressing ring, a static ring seat balance hole gap, a radial gap between a static ring seat and the static ring housing, a backflow channel I, an accumulated liquid cavity and a backflow channel II which are communicated in sequence. The combined mechanical seal device achieves long-service-life, low-friction and zero-leakage work of a mechanical seal under the working conditions of high temperature and high pressure.

The invention discloses an adjustable balance cylinder, which comprises a cylinder body, a front end cover plate, a cylinder shaft seat barrel, a balance cylinder shaft, a flexible assembly baffle, aflexible assemblies, a connector, a bearing connecting rod, a flange adjusting shaft and an adjusting connector, wherein the front end cover plate fixedly covers on the front end of the cylinder body; the cylinder shaft seat barrel is fixed on the front end cover plate; the balance cylinder shaft is located in the cylinder shaft seat barrel and can slide in the cylinder shaft seat barrel; the flexible assembly baffle is connected to one end of the balance cylinder shaft; the flexible assemblies surround the balance cylinder shaft; the connector is connected to the other end of the balance cylinder shaft; the bearing connecting rod is connected with the front end cover plate and the rear end of the cylinder body; the flange adjusting shaft is fixed to the rear end of the cylinder body; the adjusting connector is connected with the flange adjusting shaft and is used for adjusting the pre-compressed amount of the flexible assemblies. According to the adjustable balance cylinder, the pre-compressed amount of the flexible assembly in the cylinder body is adjustable, the work load of a robot is variable, the balanced load acts on the bearing connecting rod, and the service life of the cylinder body is prolonged.

The invention relates to a watchcase positioning carrier. A carrier base plate is installed on the right side of the upper portion of a carrier installation plate. A carrier sliding rail is transversely installed on the left side of the upper portion of the carrier installation plate. A fixed block is installed on the right side of the upper portion of the carrier base plate. A movable block is installed on the carrier sliding rail through a carrier sliding block. Four spring guide shafts are installed on the lower portion of the carrier installation plate. Each spring guide shaft is sleeved with a spring b and a spring heightening ring. A suction cup floating plate is installed on the spring heightening rings. The two spring guide shafts on the front side and the two spring guide shafts on the rear side are each provided with a spring adjusting block. A spring adjusting screw is installed between the carrier installation plate and each spring adjusting block. The suction cup floating plate is provided with a suction cup stand column. The upper end of the suction cup stand column is provided with a suction cup, and the lower end of the suction cup stand column is provided with a gas pipe connector. The lower portion of the gas pipe connector is provided with a gas pipe connector sealing plate. A wedge-shaped block is installed at the left end of the movable block. The lower end of the wedge-shaped block penetrates through the carrier installation plate. The watchcase positioning carrier can position a watchcase, and meanwhile can pressurize a display screen attached to the watchcase to make attaching firm.

The invention relates to a three-dimensional printing technology, and particularly relates to a printing head of a three-dimensional printer. The printing head comprises a heating head and a wire feeding mechanism, and is characterized in that the heating head comprises more than two sub heating heads, a connecting plate, a front fixed baffle plate, a rear fixed baffle plate, a left fixed baffle plate and a right fixed baffle plate, the sub heating heads are arranged on the connecting plate according to a matrix, and a feeding hole of each sub heating head is connected with a discharging hole of the wire feeding mechanism at the far end through a sleeve. The printing head of the three-dimensional printer is capable of completing multicolor printing and capable of effectively improving the printing precision and increasing the printing speed. Compared with the prior art, the printing head has the advantages of compact structure, small size, light weight, small working load, adjustable compaction degree of a wire rod, and the like.

The invention provides a culture communication advertisement display rack, which comprises a display portion and a supporting portion, wherein the supporting portion is connected to the back of the display portion; the display portion comprises a display plate, a transparent cover, a first hinge and an adhesion device; one end of the first hinge is connected to one side of the display plate, and the other end of the first hinge is connected to one side of the transparent cover; the transparent cover can turn along the plane of the display plate around the first hinge; the transparent cover isas wide as the display plate; the adhesion device adheres to the upper surface of the display plate; a pair of locking plates are arranged at the other side of the transparent cover; and plate eyeletsare formed in the locking plates. The display rack provided by the invention can replace advertising pages conveniently, without destructive demolition, so that the advertising pages can be repeatedly used; therefore, resource waste and property loss as well as the generation of a great amount of waste can be prevented, and environmental pollution can be relieved; and the display rack is quite convenient to move and transport, so that efficiency is improved.

The invention discloses a compound material grating sandwich flange forming mold and forming method, and belongs to the field of flange production. Winding forming of a compound material grating sandwich flange can be achieved, the compound material grating sandwich flange component production efficiency is improved, and the manual cost is reduced. The compound material grating sandwich flange forming mold comprises a rotating shaft, a silicon rubber block, a plastic foam block and a compaction board; the rotating shaft is located on an axis of the mold, the silicon rubber block and plastic foam are located on the upper and lower surfaces of the rotating shaft, and the compaction board is located on the periphery of the silicon rubber block and the plastic foam block. In a flange forming process, firstly, an inner skin of a formed structure is wound around the rotating shaft; then a formed grating sandwich is wound around the silicon rubber block; finally, the silicon rubber block is removed, and a formed outer skin is wound around the plastic foam block; in forming processes of the inner skin, the outer skin and the grating sandwich, flange end sockets are formed at the same time,after a structure is subjected to winding forming, the compaction board is used for compacting the periphery of a component, and after the structure is subjected to curing forming, the compaction board is detached.

The invention discloses a magnetic rubber strip production line with a magnetic rubber strip protection function. The magnetic rubber strip production line comprises an extrusion molding device, a cooling device, a magnetizing device, a traction device and a reeling device, wherein the cooling device comprises a water tank; hinging frames are arranged at the middle part of the upper end surface ofthe water tank; a U-shaped frame is hinged onto each hinging frame; one hinging shaft of the U-shaped frame extends out to reach the outer side of the hinging frame; a first gear is arranged at the outer end of the hinging shaft; a potentiometer is arranged on the hinging frame; a second gear is arranged on a rotating shaft of the potentiometer; the second gear and the first gear are engaged witheach other; the traction device comprises a traction motor; the traction motor is connected with a traction frequency converter; and the traction frequency converter is connected with the potentiometer. The potentiometer is driven to rotate through the movement of the rubber strip per se; when the potentiometer rotates, the rotating speed of the traction motor is regulated by regulating the frequency of the traction frequency converter, so that the traction speed and the extrusion speed maintains dynamic balance; and the tensile failure of the rubber strip due to too high traction speed is prevented.

The invention discloses a full-wave-band adjustable highly-integrated femtosecond pulse compressor part which comprises a liquid crystal box, a quarter of a wave plate and a linear polarization converter. The quarter of the wave plate is arranged on one side of an incident light direction of the liquid crystal box and the linear polarization converter is arranged on one side of an emitting light direction of the liquid crystal box. The liquid crystal box comprises a box which is composed of two parallel pieces of glass or two parallel pieces of quartz and spiral liquid crystals arranged in the box. Revolving shafts of the spiral liquid crystals are vertical to the box and crystals contacted with the box have parallel orientation. The central wavelength of the quarter of the wave plate is arranged on one of rims of band gaps which are formed by the spiral liquid crystals. The bandwidth of the quarter of the wave plate is wide enough to cover a wavelength range of the band edge. The linear polarization converter is an optical element which can convert circularly polarized light into linearly polarized light. The impulse compression technology is small, effective and free of loss, devices adopting the impulse compression technology in an optical network are realized, integration level of pulse lasers of the full-wave-band adjustable highly-integrated femtosecond pulse compressor part is improved and work performances based on impulse laser elements are improved.

The invention relates to a manufacturing and detecting technology of hydrogen storage and transportation equipment, and aims to provide a method for testing the performance of a non-metal sealing element in a high-pressure hydrogen environment. The test method comprises the following steps: forming a test cavity by a base and a gland, wherein an O-shaped ring sample clamping frame, a reducer pipe and a check ring are arranged in the test cavity; a tested O-shaped ring sample is embedded in grooves in the side edge and the upper surface of the O-shaped ring sample clamping frame respectively, and a static load exposure test, a circulating pressure fatigue test and a sealing performance test are carried out. The test cavity is small in size and low in gas consumption; the test condition can meet the actual service condition of the non-metal rubber sealing element; sample specification parameters can be expanded only by changing the size of the internal sample holder, the safety of the device is guaranteed, the test cost is reduced, the test efficiency is improved, and the problem that an existing nonmetal sealing material performance testing device is single in function is solved.

The invention discloses a nuclear-power-unit main steam isolating valve chest pressure releasing plate. The nuclear-power-unit main steam isolating valve chest pressure releasing plate comprises a pressure releasing plate body. The pressure releasing plate body comprises a panel frame assembly and a lifting assembly used for opening the pressure releasing plate body, inclined face shroud plates are installed on the two sides of the panel frame assembly correspondingly, and a side face shroud plate is installed on the front face; one side of the bottom of the panel frame assembly is movably connected with a bottom frame through hinges, the pressure releasing plate body achieves opening and closing through hinges, and the lifting assembly comprises a jack and a plurality of pressure reducing plug pins; and a jack sliding rail is arranged on one side, away from the hinge, of the bottom frame, the jack is connected with the bottom frame through the jack sliding rail, and the multiple pressure reducing plug pins are fixedly installed on the outer portion of one side, away from the hinge, of the bottom frame at equal intervals. According to the nuclear-power-unit main steam isolating valve chest pressure releasing plate, the structure is simple, using is convenient and effective, and the pressure releasing plate can be automatically opened to achieve a pressure releasing function when pressure is high.

The invention discloses a wire drawing processing device for the outer surfaces of stainless steel pipes. The wire drawing processing device comprises a base. A sliding chute is formed in the upper end of the base. A threaded rod and a first limiting rod are arranged in parallel in the sliding chute. A first motor is fixedly arranged on the inner wall of the sliding chute, and one end of the threaded rod is fixedly connected with an output rod of the first motor. The threaded rod and the first limiting rod are provided with a sliding plate in a penetrating mode. A plurality of placing groovesare formed in the upper surface of the sliding plate at equal intervals. A limiting adjusting mechanism matched with the plurality of stainless steel pipes during use is arranged on the surface of thesliding plate. Two supporting columns are symmetrically and fixedly connected to the two ends of the upper surface of the base. By means of the wire drawing processing device, the plurality of stainless steel pipes can be subjected to wire drawing processing at the same time, so that the working efficiency is high; the positions of all the stainless steel pipes can be adjusted conveniently at thesame time, so that all-round wire drawing processing of round surfaces of the stainless steel round pipes can be carried out; and the rotation deviation of stainless steel round pipes can be effectively prevented during wire drawing processing of the stainless steel round pipes, so that the processing effect is better.

The invention relates to a full-automatic alignment and assembly machine which comprises a base plate, a manipulator mechanism, a feeding mechanism, a photographing and capturing mechanism, a jacking mechanism, a carrier mechanism and a finished product moving-out mechanism. Firstly, a worker puts an adhesive-dispensed watch case and film-stripped watch glass in a feeding carrier of the feeding mechanism. A clamping jaw of the photographing and capturing mechanism grabs the watch case and puts the watch case in a carrier of the carrier mechanism to be positioned, meanwhile a manipulator sucks the watch glass, a CCD on the photographing and capturing mechanism photographs the position of the watch case, the manipulator moves the watch glass to the position under the CCD, and the approximate position of the watch glass is photographed. The watch glass is obliquely inserted into the watch case, the CCD accurately positions the watch glass, multiple-time alignment is performed till the circle centers and angles of the watch case and the watch glass coincide, and the watch glass is attached to the watch case. A pressure maintaining suction disc ascends to suck the watch case, a watch glass profiling suction disc leaves, and the pressure maintaining suction disc descends under the effect of a spring to perform pressure maintaining. The manipulator grabs a product, puts the product onto the finished product moving-out mechanism and delivers the finished product to a standard position. The full-automatic alignment and assembly machine can achieve automatic alignment and is high in assembly accuracy.

The invention relates to a spring assistance device and an automatic sliding door. The spring assistance device is used in the automatic sliding door and comprises a pipe type shell and a spring; the spring is located in the shell and arranged along the length direction of the shell; one end of the shell is provided with a jackscrew; the other end of the shell is provided with a push rod; one end of the spring abuts against the jackscrew; the other end of the spring is compressed by the push rod towards the direction of the jackscrew when the automatic sliding door is closed; the shell is also provided with installation brackets; and the installation brackets are fixedly connected with a track of the automatic sliding door. According to the spring assistance device and the automatic sliding door provided by the invention, the defects of high cost and complicated structure of the existing automatic sliding door of which a door body is heavier or the door body is required to sink are overcome; and therefore, the spring assistance device which can enable the automatic sliding door to save energy and be simple in structure is provided.

The invention discloses a nuclear-power-unit main steam isolating valve chest pressure releasing plate. The nuclear-power-unit main steam isolating valve chest pressure releasing plate comprises a pressure releasing plate body. The pressure releasing plate body comprises a panel frame assembly and a lifting assembly used for opening the pressure releasing plate body, inclined face shroud plates are installed on the two sides of the panel frame assembly correspondingly, and a side face shroud plate is installed on the front face; one side of the bottom of the panel frame assembly is movably connected with a bottom frame through hinges, the pressure releasing plate body achieves opening and closing through hinges, and the lifting assembly comprises a jack and a plurality of pressure reducing plug pins; and a jack sliding rail is arranged on one side, away from the hinge, of the bottom frame, the jack is connected with the bottom frame through the jack sliding rail, and the multiple pressure reducing plug pins are fixedly installed on the outer portion of one side, away from the hinge, of the bottom frame at equal intervals. According to the nuclear-power-unit main steam isolating valve chest pressure releasing plate, the structure is simple, using is convenient and effective, and the pressure releasing plate can be automatically opened to achieve a pressure releasing function when pressure is high.

The invention discloses an embossing apparatus for a garment material. The embossing apparatus comprises a feeding mechanism, an embossing mechanism, a material recovering mechanism and a drying mechanism, wherein the feeding mechanism comprises a feeding rack, a feeding roll, a feeding cylinder, a storage bin, a pressing and conveying assembly and a conveying roll; the embossing mechanism comprises an embossing frame, an embossing shaft, an embossing motor, an end plate, a station plate, a first embossing roll, a second embossing roll, a third embossing roll, a fourth embossing roll, a lower embossing roller, a conveying roller, a shell cover and a hot steam nozzle; the lower embossing roller is provided with concave patterns respectively matching with a first convex pattern, a second convex pattern, a third convex pattern and a fourth convex pattern; and the drying mechanism comprises a drying rack, a cold-air drier, a drying roller and an auxiliary roll. The embossing apparatus provided by the invention is simple to operate, high in an automation degree, capable of pressing complex and changeable patterns on fabrics, good in embossing quality and high in embossing efficiency.

The invention discloses a sweet potato seedling throwing, soil covering and pressing device and a sweet potato planter; the sweet potato seedling throwing, soil covering and pressing device comprisesa rack, wherein a ditching and seedling throwing assembly, a soil covering assembly and a pressing assembly are sequentially arranged on the rack from front to back; a sweet potato seedling throwing mechanism and a furrow opener are arranged above and below the ditching and throwing assembly; a seedling falling groove is formed in the middle of the furrow opener, and the throwing end of the potatoseedling throwing mechanism directly faces the seedling falling groove; and the heights of the soil covering assembly and the pressing assembly relative to the rack are adjustable. The furrow opener,the sweet potato seedling throwing mechanism, the soil covering assembly and the pressing assembly are arranged, so that ditching, potato seedling throwing into ditches in a set posture, soil covering and soil pressing can be continuously executed, step-by-step operation is not needed, and the mechanization degree is high; the heights of the soil covering assembly and the pressing assembly relative to the rack can be adjusted, so that the soil covering depth and the soil pressing degree can be adjusted according to needs, and the device is suitable for transplanting and planting different types of sweet potatoes in different soils.

The invention discloses a testing mechanism. Wherein, the test mechanism includes a mounting base and at least one floating pressing device, and the mounting base is provided with at least one first positioning hole; each floating pressing device includes a pressing block, a connector and a buffer assembly, and the pressing block is provided with a first positioning hole. The second positioning hole connected to the hole, the pressure block is used to seal the sound hole of the test piece; one end of the connecting piece is rotated in the first positioning hole and the second positioning hole, and the pressure block can move along the axial direction of the connecting piece, The other end of the connecting piece is provided with an external thread; the buffer assembly includes an elastic piece and an adjusting piece, the adjusting piece is provided with an internal thread matched with the external thread, and the adjusting piece is threadedly connected with the connecting piece; the two ends of the elastic piece are respectively connected with the pressure block and the The adjustment piece is connected; wherein, the rotation of the connection piece drives the adjustment piece to approach or move away from the pressure block. The invention can adjust the size of the pressure on the test piece. At the same time, the elastic member can also play a buffering role, reducing the impact of the vibration of the testing mechanism on the test piece.

The invention discloses a detection and control device and method for the powder adding height of a powder charging pipe of a gas generator and belongs to the technical field of detection and control of the powder adding height of the powder charging pipe of the gas generator. According to the device, the compaction degree between gas generating powder pieces in the powder charging pipe can be adjusted, the clearances between the gas generating powder pieces are uniform, and the powder adding height can be detected. The device comprises a support, a powder input unit, a first motor, a second motor, a tumbler, a lifting rope, a pull frame with an opening formed in the lower end, a vertical pipe and a controller. The vertical pipe shakes under rotation of the tumbler, the vertical pipe rolls under rotation of the second motor, and the vertical pipe sieves under sieving of a sieving generator; and the compaction degree between the gas generating powder pieces in the powder charging pipe is adjusted, the clearances between the gas generating powder pieces are uniform, and the powder adding height can be detected in a shaking manner, a rolling manner and a sieving manner. The detection and control device and method are mainly used for the gas generating powder piece adding technology of the powder charging pipe of the gas generator.

The invention provides a powder feeder with adjustable friction force of the powder plate. By setting a lifting mechanism between the spring and the motor, the adjustment and control of the lifting mechanism realizes that the compression amount of the spring can be adjusted, and the compression amount of the spring can be adjusted. Reactive pressure, so as to achieve the purpose of controlling the friction between the powder basin and the powder outlet. When the friction coefficient becomes larger, the friction force can be reduced by increasing the spring space and reducing the reaction pressure. At the same time, the pressure of the powder outlet can be taken into account to avoid the pressure being too small to achieve the sealing effect; and because the pressure can be adjusted linearly , at the same time, there is no need to replace the spring, which improves the convenience of debugging during use, and does not need to consider the consideration of spring selection under various conditions, which enhances the applicability; in actual use, because the pressure can be adjusted to reduce friction, It can also prevent the powder pan from stalling when the friction force is greater than the motor torque, resulting in equipment downtime.

The invention discloses a compensation moving dolly for a continuous casting steel moving machine, comprising a frame, a joist fixed on the frame and four wheels installed at two ends of the frame. The lower parts of two ends of the frame are fixedly provided with two guide boxes; each guide box is internally provided with a disc spring group, a guide rod and a guide plate; the disc spring groups and the guide plate are connected in series by the guide rod; the top end of the guide rod extends out of the guide boxes and is connected with a rope ring; the end part of the guide box is provided with a pressure plate which supports the guide rod; and the frame is fixedly provided with an upper heat prevention plate and a lower heat prevention plate. The invention is a compensation moving dolly for a continuous casting steel moving machine, which is novel in structure and symmetrically arranged, and has good performances such as heat radiation prevention, adjustable steel cable tensile force, disc spring buffering, large length compensation of steel cable close ring and the like.

The invention discloses a testing mechanism, wherein the testing mechanism comprises a mounting seat and at least one floating pressing device, and the mounting seat is provided with at least one first positioning hole; each floating pressing device comprises a pressing block, a connecting piece and a buffer assembly, the pressing block is provided with a second positioning hole communicated with the first positioning hole, and the pressing block is used for sealing a sound hole of the to-be-tested piece; one end of the connecting piece is rotationally arranged in the first positioning hole and the second positioning hole, the pressing block can move in the axial direction of the connecting piece, and the other end of the connecting piece is provided with an external thread; the buffer assembly comprises an elastic piece and an adjusting piece, the adjusting piece is provided with an internal thread in threaded fit with the external thread, and the adjusting piece is in threaded connection with the connecting piece; two ends of the elastic piece are respectively connected with the pressing block and the adjusting piece; and the connecting piece rotates to drive the adjusting piece to be close to or away from the pressing block. According to the invention, the pressure applied to the to-be-tested piece can be adjusted. Meanwhile, the elastic piece can also play a buffering role, so that the influence of the vibration of the testing mechanism on the piece to be tested is reduced.

The invention provides an internal combustion wave rotor with a movable end cover and a sealing method, and belongs to the technical field of aero-engine combustion chamber sealing. An internal combustion wave rotor movable end cover sealing device mainly comprises the wave rotor, a fixed end cover, the movable end cover and other structures. The fixed end cover and a positioning assembly arranged on the fixed end cover achieve a function of limiting the stroke of the movable end cover. Under the action of a spring on the positioning assembly, the movable end cover always makes contact with a friction piece on a wave rotor channel, and radial and circumferential sealing of the internal combustion wave rotor is achieved. Movement of the movable end cover can contain system heat expansion, and the effect that the rotor is not stuck is ensured. By adopting the internal combustion wave rotor movable end cover sealing device, the performance loss and the working instability caused by leakage in the working process of the internal combustion wave rotor can be greatly reduced; and meanwhile, the sealing method can be used for sealing of other rotating systems in the aviation field.

The invention discloses a full-wave-band adjustable highly-integrated femtosecond pulse compressor part which comprises a liquid crystal box, a quarter of a wave plate and a linear polarization converter. The quarter of the wave plate is arranged on one side of an incident light direction of the liquid crystal box and the linear polarization converter is arranged on one side of an emitting light direction of the liquid crystal box. The liquid crystal box comprises a box which is composed of two parallel pieces of glass or two parallel pieces of quartz and spiral liquid crystals arranged in the box. Revolving shafts of the spiral liquid crystals are vertical to the box and crystals contacted with the box have parallel orientation. The central wavelength of the quarter of the wave plate is arranged on one of rims of band gaps which are formed by the spiral liquid crystals. The bandwidth of the quarter of the wave plate is wide enough to cover a wavelength range of the band edge. The linear polarization converter is an optical element which can convert circularly polarized light into linearly polarized light. The impulse compression technology is small, effective and free of loss, devices adopting the impulse compression technology in an optical network are realized, integration level of pulse lasers of the full-wave-band adjustable highly-integrated femtosecond pulse compressor part is improved and work performances based on impulse laser elements are improved.

The invention belongs to the technical field of bearing dynamic testing, and particularly relates to a flexible bearing testing device which comprises a testing rack and further comprises a core shaft rotationally installed on the testing rack, one end of the core shaft is arranged in an overhanging mode and fixedly provided with an elliptical shaft, the elliptical shaft and the core shaft are coaxially arranged, and the elliptical shaft and the core shaft are coaxially arranged. The elliptical shaft is used for penetrating into an inner ring of the flexible bearing to be tested and is fixedly assembled with the inner ring; the test rack is further provided with an installation support arranged around the oval shaft, at least four jacking blocks are evenly distributed on the installation support in the circumferential direction of the mandrel at intervals, elastic pieces are arranged between the jacking blocks and the installation support, and the elastic pieces are used for driving the jacking blocks to abut against the outer ring of the flexible bearing in the radial direction.

The invention relates to a sealing testing device which is used for conducting tests of different compression amount on a sealing ring of a lamp. The sealing testing device comprises a sealing body and a sealing cover. One end of the sealing body is closed, the other end of the sealing body is open, and the sealing body is provided with a sealing groove for containing the sealing ring and a limiting step along the periphery of the sealing body upwards. One end of the sealing cover is sealed, the other end of the sealing cover is open, the open end of the sealing cover is provided with a locating step matched with the limiting step, and sealing faces with different inner diameters are arranged on the periphery of an inner wall of the sealing cover. By arranging the limiting step of different heights on the sealing body, and by matching with the locating step on the sealing cover and the sealing face, compression amount is adjustable, sealing performance testing is conducted for the sealing ring with certain hardness and line diameter by selecting different sealing faces, the sealing faces with different inner diameters correspond to different compression amount, the optimal compression amount of the sealing ring can be determined conveniently, repeated designing of a sealing strip can be reduced in a testing process, and design parameters of the sealing ring can be determined conveniently through one time.

The invention relates to a passive grounding knee joint exoskeleton robot and a power assisting method thereof, and the robot comprises the following components: a thigh mechanism which comprises a thigh rod; the knee joint energy storage mechanism comprises a knee joint assembly, an elastic rod and a foot assembly, the upper end of the elastic rod is connected with the knee joint assembly, the lower end of the elastic rod is connected with the foot assembly, and the knee joint assembly is connected with the lower end of the thigh rod; the knee joint energy storage mechanism is used for storing and releasing gravitational potential energy of the human body in the walking process; the shank mechanism comprises a shank rod, and the upper end and the lower end of the shank rod are connected with the knee joint assembly and the foot assembly respectively. The device is simple in structure, light in size, convenient to wear, stable, reliable, reasonable in working principle and obvious in assistance.

The invention relates to three-dimensional printing technology, in particular to a printing head of a three-dimensional printer. It includes a heating head and a wire feeding mechanism, and is characterized in that the heating head includes more than two sub-heating heads, connecting plates, front and rear fixed baffles, and left and right fixed baffles, and the sub-heating heads are arranged in a matrix on the On the connecting plate, the feed port of the sub-heating head is connected to the feed port of the wire feeding mechanism at the far end through a sleeve. Its purpose is to design a print head of a three-dimensional printer that can complete multi-color printing and can effectively improve printing accuracy and speed. Compared with the prior art, it has the advantages of compact structure, small volume, light weight, small working load, and adjustable wire compression degree.