106results about How to "Guaranteed mechanical stability" patented technology

The invention belongs to the field of magnetic circuit parts of motors, and discloses a protective box type amorphous, microcrystal or nano-crystal alloy stator core for a motor and a preparation method thereof. The method comprises the following steps of: stamping a coiled alloy strip (3) to form a plurality of same annular stamped sheets, wherein the tooth ends of inner teeth (1) of the stampedsheets are positioned on the same circumference and the outer side of each stamped sheet is provided with at least one positioning groove (2); stacking the plurality of annular stamped sheets in a protective box with open upper end, putting the stamped sheets and the protective box into insulated coating solution together and performing insulated dip-coating treatment; taking out the stamped sheets and the protective box together, performing compactness treatment on the annular stamped sheets, fixing an upper end panel of the protective box and the inner center surface together, and forming the stator core; and performing integral annealing treatment on the stator core of the sealed protective box. By the method, the process problems that the stator core is easily damaged to drop residue and cracks among layers, the performance declines because the adhesive stress cannot be eliminated and the like are solved, and the performance of the stator core is greatly improved.

An automatic milking plant is provided with a short milk hose, which, due to spaced-apart elevations in its center piece, has sufficient mechanical stability vis-a-vis pressure differences as well as a high flexibility. The use of the short milk hose according to the present invention leads to a reduction of the mechanical strain on the udder and thus also reduces irritations of the animal to be milked.

The invention discloses a terahertz time-domain spectroscopy complete polarization electromagnetic scattering measurement system and acquisition method. According to the method, HH transceiving polarization, HV transceiving polarization, VH transceiving polarization and VV transceiving polarization are achieved by the aid of a terahertz time-domain spectroscopy complete polarization target electromagnetic scattering measurement system. The system mainly comprises a femtosecond laser source, a terahertz transmitting source, a terahertz wave beam collimation system, a target turntable system, aterahertz wave polarization control system, a terahertz wave detection system and a data acquisition and control system, a transceiving polarization mode is determined by adjusting rotating directionsof a hertz polarizer and a femtosecond laser half-wave plate, so that a turntable and a time delay line are controlled, and target polarization terahertz time-domain spectroscopy scattering signals under different postures are acquired in a scanned manner. According to the system, scattering characteristic measurement of target complete polarization RCS and 3D (three-dimensional) ISAR and the like within a terahertz high-frequency point and large-spectrum width range can be achieved, and the mechanical stability of the system is further ensured.

The invention discloses an electromagnetic repulsive force edge pressing method and device based on inertial confinement. The method comprises the steps that an edge pressing coil is discharged; the edge pressing coil is arranged on the upper portion of an edge pressing copper ring; the edge pressing copper ring is arranged on the upper portion of the edge of a workpiece; the workpiece is arranged on the upper portion of a female die; the to-be-deformed workpiece is molded through the female die, a pulsed magnet field is generated in the discharging process of the edge pressing coil, induced eddy current correspondingly generated in the edge pressing copper ring and the pulsed magnet field interact, and thus electromagnetic repulsive force is generated between the edge pressing coil and the edge pressing copper ring; and edge pressing force to the edge of the workpiece is provided by the electromagnetic repulsive force between the edge pressing coil and the edge pressing copper ring so that the edge positions of the workpiece can be kept stable in the molding process, meanwhile, workpiece material flowing is controlled, and the workpiece is prevented from being wrinkled and broken in the molding process. Through the electromagnetic repulsive force between two edge pressing coils of between the edge pressing coil and the edge pressing copper ring, the edge pressing force can be flexibly controlled, the device manufacturing cost is reduced, the space size is reduced, and the power source energy of a system can be effectively reduced.

The invention discloses a cantilever type end face coupler. The cantilever type end face coupler comprises a silicon substrate, a buried oxide layer, a silicon waveguide and a silicon nitride waveguide; a groove having the first pre-set height is etched on the silicon substrate; the buried oxide layer is formed on the upper surface of the silicon substrate; the buried oxide layer comprises a flatplate layer and a ridge type layer; the flat plate layer is formed on the upper surface of the silicon substrate; the ridge type layer is formed on the upper surface of the flat plate layer, and horizontally extends out of the flat plate layer; the silicon waveguide is formed in the buried oxide layer, and positioned over the ridge type layer; and the silicon nitride waveguide is formed in the buried oxide layer, and positioned over the silicon waveguide. The cantilever type end face coupler in the invention has the benefits that: the ridge type buried oxide layer is adopted; the end face coupler matched with the light-field speckle of a single-mode optical fibre is realized; the flat plate layer is used as the support structure of the cantilever type end face coupler; the mechanical stability is ensured; the flat plate layer serves as the index-matching fluid; the dependence of the cantilever type end face coupler on the index-matching fluid is reduced; the silicon nitride waveguide is used as the intermediate transition layer; and thus, the light field of the single-mode optical fibre can enter the silicon waveguide with the relatively high coupling efficiency.

This invention provides an accurate quick leveling device including a leveling platform, an installing base, multiple sets of parallel reeds between the leveling platform and the base, on-line position measurement sensor components, eccentric / cam components, pre-strain springs and an executing wheel component, all of which are set on the base corresponding to each other in a same included angle.

The invention discloses a vacuum squeezed state light field generation device and method. The device comprises a laser, an optical parametric oscillator, a frequency shifting device, a temperature control device, a lock cavity device, a half wave plate, a first polarized light beam splitter, a second polarized light beam splitter and a dichroic mirror. Due to the frequency shifting device, rapid frequency shifting of continuous single-frequency laser can be achieved, fill-in light is obtained, and the broadcasting direction of the laser cannot be changed; fill-in light passes through the optical parametric oscillator to obtain fill-in light with cavity information, the lock cavity device can generate a lock cavity signal according to the fill-in light with the cavity information and perform cavity length locking on the optical parametric oscillator, the temperature control device can achieve precise temperature control over crystals, and the optical parametric oscillator works in the degenerate state. By adopting the device or method, the problem that seed light is injected or a triply resonant optical parametric oscillator must be adopted can be avoided, the mechanical stability of the optical parametric oscillator is maintained, and therefore the stably-output vacuum squeezed state light field is obtained.

The invention relates to a pigment with high brightness, color purity and covering effects. The pigment comprises a core material and an outer covering layer, wherein the core material is of a 1-20 layer structure and comprises an air layer and / or one of the following three layers: a dielectric layer, a reflection layer and a multi-layer structure consisting of the dielectric layer and the reflection layer; the total thickness of the core material is 20-1000nm; the thickness of a single layer of the dielectric layer is 50-300nm; the thickness of a single layer of the reflection layer is 20-100nm; the deviation of the total thickness of the core material and the thickness of the single layer of the dielectric layer or the reflection layer is not greater than 1% or 5nm of the average value of the total thickness and corresponding layer thicknesses; the outer covering layer consists of 1-6 layers; the total thickness of the outer covering layer is 20-1000nm; the thickness of each coveringlayer is 10-300nm. The pigment provided by the invention can be applied to coatings, ink, cosmetics and makeup products.

The present invention relates to a guide-bar(1)for a warp knitting machine and a method of making the same, wherein the guide-bar(1)for a warp knitting machine has a bracket(2)made of a first material and an accessorial part(10)which is made of a second material and holds a knitting implements(9). The accessorial part(10)is fixed on the bracket(2)by a clamping surface(19). The space precision is anticipant to be kept regardless of temperature as much as possible. Thus the accessorial part(10)has a slot(16)extending along sloping line in the clamping surface(19).

The invention relates to a preparation method of a crosslinking-type anion selective membrane. The method includes the steps of dissolving polybromomethyl-2,6-dimethyl-1,4-phenylate in an organic solvent, then adding unsaturated tertiary amine the molecular structure of which contains a carbon-carbon double bond, and making unsaturated tertiary amine subjected to a primary amination reaction withpartial bromomethyl; adding saturated tertiary amine to be subjected to a secondary amination reaction with remaining bromomethyl, and obtaining a reactant liquid after the reaction is completed; adding an oil-soluble initiator into the reactant liquid to obtain a membrane liquid; coating a base material with the membrane liquid, and heating and drying the base material to obtain a base membrane;placing and fully soaking the base membrane in a water solution in which a water-soluble oxidation-reduction initiator is dissolved, taking out the base membrane and cleaning the base membrane with water after soaking, and correspondingly obtaining the crosslinking-type anion selective membrane. The anion selective membrane prepared according to the method has the advantages that the production cost is low and the crosslinking degree can be adjusted according to demands, the crosslinking structure is lyophobic, and the membrane is high in mechanical and thermal stability and applicable to an application process of electrodialysis and diffusion dialysis.

The invention relates to a preparation method of an ion exchange membrane and an application thereof, belongs to the technical field of ion exchange membrane preparation process, and mainly solves thetechnical problems of low ion conductivity, poor mechanical stability and the like existing in the present ion exchange membrane. The technical scheme of the invention is as follows: the preparationmethod of the ion exchange membrane comprises the following steps: 1) dissolving a perfluorosulfonic acid resin in a high boiling point polar solvent to prepare a perfluorosulfonic acid resin solution; 2) coating the perfluorosulfonic acid resin solution on a clean polytetrafluoroethylene porous mesh cloth through casting, dipping or scraper to prepare a mesh cloth supported perfluorosulfonic acidmembrane; and 3) soaking the mesh cloth supported perfluorosulfonic acid membrane in the nitrogen-containing heterocyclic polymer resin solution, then thoroughly drying the membrane, rinsing with water for many times and drying the membrane so as to obtain the ion exchange membrane. The preparation method has the advantages of high ion selectivity, high mechanical and chemical stability and the like.

The invention relates to an adhesive delivering ink-jet ticket printer, which comprises a rack, a front group of driving wheels, a rear group of driving wheels and a printing medium supporting plate, wherein the front group of driving wheels and the rear group of driving wheels are installed on the rack, the printing medium supporting plate is installed on the rack and located between the two groups of driving wheels, each group of driving wheels comprises an upper driving wheel and a lower driving wheel, and the lower driving wheel of each group of driving wheels is connected with a driving motor and then connected with the lower driving wheel of the other group through a driving belt; and the supporting plate is provided with ink-jet printing heads thereon, and a drying device is installed at paper outlet ends of the ink-jet printing heads. The adhesive delivering ink-jet ticket printer is fast in printing speed, low in maintenance cost, good in printing quality and capable of delivering non-continuous tickets conveniently.

The invention discloses a preparation method of a self-humidifying ordered polymer membrane electrode, belonging to the technical field of membrane electrode preparation. An ordered ion exchange polymer nanotube array prepared through the method is fused together with a polymer membrane and is provided with highly ordered ion, electron and gas mass transfer channels, and electrochemical three-phase reaction interfaces are distributed in the outer surfaces of polymer nanotubes with water storage functions, so that a high-efficiency energy conversion process can be carried out in a self-humidifying manner. A catalyst in a nanoparticle or microparticle state is bonded on the surface of the ion exchange polymer nanotube array to form a catalysis layer and is relatively high in specific surface area and catalytic activity, so that the three-phase reaction interfaces of the membrane electrode are greatly added, the electrochemical polarization, the ohmic polarization and the concentration polarization of the electrode are reduced, the energy conversion efficiency is improved, and the reaction speed is increased. According to the preparation method, a membrane electrochemical reactor system is expected to be remarkably simplified, the energy conversion efficiency and the stability are improved, and the operation life is prolonged.

The invention discloses a turning method for a duplex stainless steel P-type block, and belongs to the technical field of ship building. The method comprises the following steps that firstly, turningmain hooks, turning auxiliary hooks and translation main hooks are arranged on the P-type block; secondly, lifting hooks of a first crane are connected with the turning main hooks, lifting hooks of asecond crane are connected with the turning auxiliary hooks, and the lifting hooks of the first crane and the lifting hooks of the second crane rise; thirdly, when the rising height of the P-type block is two times the height of the P-type block, the lifting hooks of the first crane and the lifting hooks of the second crane stop rising, and the lifting hooks of the second crane fall; and fourthly,when the stress of the lifting hooks of the second crane is zero, connection between the lifting hooks of the second crane and the turning auxiliary hooks is relieved, the lifting hooks of the secondcrane are connected with the translation main hooks and rise, and turning of the P-type block is achieved. According to the method, by reasonably arranging lifting rings, direct contact between the lifting rings and a stainless steel material is avoided, and it is guaranteed that the performance of duplex stainless steel is not influenced.

The present invention discloses a light emitting diode and a preparation method thereof, and an application thereof. The light emitting diode comprises an anode, a cathode and a light emitting unit combined between the anode and the cathode, the anode comprises a first metallic oxide layer, a graphene layer and a second metallic oxide layer combined in a stack mode in order, and the first metallicoxide layer or the second metallic oxide layer and the light emitting unit are combined in a stack mode. The anode included in the light emitting diode is a composite sandwich construction to achieveimprovement of the light take-out efficiency of the light emitting diode to increase the photoelectric efficiency and the electrical stability and the mechanical stability of the anode and ensure thelife stability of the light emitting diode. The preparation method of the light emitting diode ensures the electrical stability and the mechanical stability of the prepared light emitting diode, andthe application of the light emitting diode comprises application in a display screen or solid state illumination lamps and lanterns.

The invention discloses a structure of a self-supporting supercapacitor electrode material and a preparation method. A flexible substrate material with high conductivity is taken as a conductive bracket; a layer of active material nanosheets which are vertically arranged, are of a cross-linked structure and have pseudocapacitive performance grows on the surface of the flexible substrate material;and a layer of conductive polymers uniformly coats the surfaces of the active material nanosheets. The prepared electrode material has high capacity and relatively high electrochemical stability, is successfully applied to a supercapacitor electrode and has excellent performance.

The invention belongs to the technical field of sensors, and provides a static and dynamic three-dimensional microcrack propagation sensor preparation method, a sensor and equipment. The preparation method comprises the following steps: preparing a piezoresistive / piezoelectric sensing functional material dispersion material, and attaching the piezoresistive / piezoelectric sensing functional material dispersion material to the surface of a fiber cloth matrix to obtain piezoresistive / piezoelectric sensing fiber cloth; performing pre-stretching treatment on the piezoresistive / piezoelectric sensing fiber cloth to obtain piezoresistive / piezoelectric sensing three-dimensional microcrack fiber cloth; carrying out microwave ablation on the piezoresistive / piezoelectric sensing three-dimensional microcrack fiber cloth, and removing a fiber cloth matrix to obtain a piezoresistive / piezoelectric sensing three-dimensional microcrack functional skeleton; the two faces of the piezoresistive / piezoelectric sensing three-dimensional microcrack functional framework are coated with conducting layers correspondingly, and then electrodes are formed; carrying out polarization treatment on the piezoresistive / piezoelectric sensing three-dimensional microcrack functional skeleton with the electrode formed on the surface; and packaging the piezoresistive / piezoelectric sensing three-dimensional microcrack functional framework to obtain the static and dynamic three-dimensional microcrack propagation sensor.

The invention relates to an MXene / nitrogen-doped carbon foam composite material with a 3D porous neuron-like structure and a preparation method thereof. The composite material takes porous nitrogen-doped carbon foam as a skeleton, pores of the porous nitrogen-doped carbon foam are of a neuron-like structure, and MXene nanosheets are uniformly deposited on the surface of the skeleton and dispersedamong the pores of the porous nitrogen-doped carbon foam. According to the MXene / nitrogen-doped carbon foam composite material provided by the invention, stacking and aggregation of the MXene nanosheets are effectively prevented, the composite material as an electrode material can provide more contact sites, the permeation of electrolyte is promoted, an effective channel is provided for the transmission of ions in electrodes, the ion transfer is accelerated, the capacitance and the rate performance can be significantly improved, and the assembled all-solid-state supercapacitor device has highcompressibility and excellent cycle stability, and has a good application prospect.

The invention relates to an organic acid modified Si / TiO2 / rGO@C lithium ion battery negative electrode material as well as a preparation method thereof. The preparation method comprises the followingsteps: S1: adding powder of nano titanium dioxide and silicon into a dispersed medium, performing the ultrasonic dispersion treatment, and ball milling; S2: adding dispersion liquid of graphene oxideinto a mixture obtained in step S1, and ball milling; S3: adding an organic carbon source into the mixture obtained in step S2, stirring, and ball milling; S4: centrifuging and drying the mixture obtained in step S3 to obtain a Si / TiO2 / GO / C composite; S5: in an inert atmosphere, calcining the Si / TiO2 / GO / C composite obtained in step S4 at 350 to 450 DEG C to obtain the negative electrode material.The invention also relates to application of the negative electrode material in a lithium ion battery negative plate. The preparation method has the advantages of simplicity and convenience in operation, low cost, easy industrialized production and the like; and the obtained negative electrode material is excellent in comprehensive performance, high in capacity retention rate and stable charging-discharging circulation performance.

The invention relates to a floatable adaptor. The length of the floatable adaptor can be adjusted to realize the installation of two panels with equal distance change. The adaptor in the invention comprises an adaptor main body, wherein the left end of the adaptor is a shape memory alloy (SMA) female head which is connected with the panel through a flange, and the right end of the adaptor main body is a butyl methacrylate (BMA) male head which is connected with the panel through a nut and an elastic gasket; a shell I and a shell II are in interference fit; the shell I is provided with an inner conductor I and an inner conductor II, and the inner conductor I is inserted into the inner conductor II; and a shell III is arranged on one side of the shell II, a contact head is arranged on one side of the shell III, and a spring is arranged between the shell I and the shell III.

A multi-spindle machining center for the chip forming processing of workpieces comprises a spindle group having at least two spindles arranged in a spindle row adjacent to each other to mount a chip forming tool, and a workpiece support, on which at least two workpiece holders, correlated with the geometrical arrangement of the spindles, for holding workpieces for a simultaneous processing by means of the spindles, are arranged, the workpiece support having a beam-like longitudinal support member bearing the workpiece supports, and the spindles are guided for a movement toward the workpiece support in a first axial direction on a spindle linear guide arrangement. In the multi-spindle machining center there is a provision such that for positioning the workpieces in relation to the spindles workpiece support is guided on a workpiece support linear guide arrangement in a second axial direction running athwart the first axial direction and wherein the workpiece support is able to be shifted on the workpiece support linear guide arrangement in a servicing area arranged above or below the a working region of the spindles.

The invention provides a sealing element for a sensor element of a sensor and a manufacturing method thereof. The sensor is used for sensing the characteristic of measuring gas in a measuring gas chamber. The sealing element is constructed for sealing the sensor element in a longitudinal hole of a housing of the sensor. The sealing element has at least one layer structure, wherein the layer structure comprises the components of at least one first layer, wherein the first layer comprises at least one ceramic material, the ceramic material at least comprises boron nitride and borone oxide, wherein the content of the borone oxide relative to the ceramic material is 2.0wt%-6.0wt% or 6.0wt%-10.0wt%; at least one another first layer and at least one another second layer, wherein the another first layer and the another second layer respectively comprise at least one oxide ceramic material, wherein the first layer is disposed between the another first layer and the another second layer, wherein the layers of the layer structure are squeezed to each other.

The invention discloses an elevator mechanism of an electronic ward round cart, which is mainly and additionally provided with an air spring, two slide rails, a control pull rod and an elevating pin on the basis of a mobile base, a case, an inner bracket, an outer bracket, an inner stand column, an outer stand column and an upper seat; because commercial slide rails which have guaranteed mechanical strength and stability are adopted as the slide rails and the air spring is matched, the elevator mechanism has the advantages of free sliding, flexible and convenient elevation, good stability, high mechanical strength, convenient operation and use, attractive and beautiful appearance and the like and is about to be liked by users. The invention is most suitable for being installed between the mobile base of the electronic ward round cart and the case as well as a workbench.

An ink jet type label printer comprises a rack, two sets of driving wheels and a printing media supporting plate, wherein the two sets of driving wheels are installed front and back on the rack, and the printing media supporting plate is installed at the part, between the two sets of driving wheels, of the rack. Each set of driving wheels comprise the upper driving wheel and the lower driving wheel. The lower driving wheel of each set of driving wheels is connected with a drive motor and then connected with the lower driving wheel of the other set of driving wheels through a driving belt. Ink jet printing heads are installed above the supporting plate, and a drying device is installed at the paper outlet ends of the ink jet printing heads. The ink jet type label printer is high in printing speed, low in maintaining cost and good in printing quality.

The invention provides a temperature control device for a laser resonant cavity. The temperature control device comprises a furnace body placed in the variable frequency laser resonant cavity and a base; a crystal carrier is arranged at the top of the furnace body; nonlinear crystal is pressed by arranging a wedge-shaped sliding block on the side of the crystal carrier and arranging an elastic pressing plate at the top of the crystal carrier, so that the mechanical stability of the crystal is ensured; and the overall structure is a sandwich structure, the furnace body is in the center, a heat insulation material is filled on four sides, and the exposed portion of the furnace body is only a light transmission portion, so that heat exchange between the furnace body and the outside is reduced, and the thermal balance of the crystal is ensured. By adopting a low-power heating fuse, the heating speed is slowed down, temperature oscillation caused by temperature oversaturation is avoided, and the size of the furnace body is reduced; and the front area of the furnace body is matched with the crystal surface, so that most of the heat is transferred to the crystal. The temperature of the crystal can be accurate to 0.05 DEG C upon test. The heat insulation layer is subjected to light transmission treatment, so that the device is prevented from shading light in the folded resonant cavity, and the device is applicable to multiple laser resonant cavities.

The invention relates to an ultraviolet-induced gradient distribution POSS microsphere / polyarylether sulfuryl composite proton exchange membrane and a preparation method thereof. Pure polysulfone withhigh sulfonation degree is used as a matrix, the surface of the matrix is scrape-coated with an otca-MAPOSS (octamethylacryloyloxypropyl POSS) / sulfonated polyether sulphone composite coating, the particle sizes of the POSS nano microspheres in the coating are distributed in a gradient manner along with the thickness, so that the composite proton exchange membrane with good interfacial compatibility and a sandwich structure is prepared, and the swelling rate of a high-sulfonation-degree sulfonated polyarylether matrix under high-temperature and high-humidity conditions is favorably reduced. The preparation method is simple, the time period is short, an existing commercial membrane can be subjected to post-treatment modification, and large-scale commercial production is facilitated.

The invention relates to a solar battery frame. The solar battery frame comprises corner keys and four U-shaped panels in head-to-tail connection; the adjacent U-shaped panels are fixedly connected through the corner keys; each corner key comprises a corner key body; each corner key body comprises a first plug board and a second plug board which are hollow structures; each first plug board and the corresponding second plug board are fixedly connected with each other so that a cross section of the corresponding corner key body is L-shaped; two surfaces of each of the first plug boards and the second plug boards are provided with saw-toothed barbs; a coating is coated on the surface of each U-shaped panel; a support plate is arranged in the opening of each U-shaped panel; a cavity is formed between each support plate and the corresponding U-shaped panel; and each first plug board and the corresponding second plug board are respectively inserted into the cavities of the corresponding adjacent U-shaped panels and tightly mated with the corresponding U-shaped panels. The solar battery frame provided by the invention is convenient for installing, capable of saving cost, and improved in connection tightness and mechanical strength.

The invention provides a super-hydrophobic metal / ceramic composite coating with the antibacterial property and a preparation method thereof. The preparation method of the super-hydrophobic metal / ceramic composite coating with the antibacterial property comprises the step: the metal / ceramic composite coating of a micro-nano composite structure is formed on the surface of a Ti-6Al-4V alloy workpiecethrough a double-cathode plasma sputtering deposition technology, wherein process parameters of double-cathode plasma sputtering deposition include that the voltage of a target material is 900-950 V,the voltage of a workpiece is 300-350 V, the space between electrodes is 8-10 mm, the working air pressure is 30-35 Pa, the deposition temperature is 650-800 DEG C, the deposition time is 3.0-3.5 h,a mixed Fe2O3-Al-Cr-Co-Ni-Cu target is adopted as the target material, and the mixed Fe2O3-Al-Cr-Co-Ni-Cu target is prepared from the components: 23.49% of Fe2O3, 7.93% of Al, 15.27% of Cr, 17.33% ofCo, 17.33% of Ni and 18.65% of Cu. According to the super-hydrophobic metal / ceramic composite coating, the surface appearance of the micro-nano composite structure can be formed, and the efficient bactericidal ability is achieved while the super-hydrophobic characteristic is achieved.

The invention provides a high-precision fast leveling device, which includes an adjusting platform, a mounting base, multiple sets of parallel reeds arranged between the adjusting platform and the mounting base, an online position measuring sensor assembly, an eccentric wheel / cam assembly, a preset Tension spring, executive wheel assembly, wherein, the multiple groups of parallel reeds, online position measurement sensor assembly, eccentric wheel / cam assembly, pre-tension tension spring, and executive wheel assembly are all arranged at the same angle and corresponding to each other in the installation on the base. The invention adopts the parallel reed structure to meet the distribution requirements of large lateral stiffness and low vertical stiffness of the adjustment platform. At the same time, the stiffness of the pre-tightened spring body can be optimized to obtain the motor drive torque, which is directly installed on the adjustment platform for measurement. The sensor assembly can effectively eliminate the gap between the transmission mechanisms and improve the precision of the leveling device.

A door impact beam (10) for a door (100) of a motor vehicle includes a first fastening portion (112) configured to be fastened to a first fastening intersection (12) of the door and a second fastening portion (114) configured to be fastened to a second fastening intersection of the door. A profiled portion (20) extends between the first fastening portion and the second fastening portion. The profiled portion is designed at least in sections as a hollow profile (30) with two side walls (32) disposed opposite to each other and two connecting walls (34) disposed opposite to each other which connect the side walls to each other. The connecting walls have an outwardly directed convex curvature.