36results about How to "Improve sliding performance" patented technology

The invention provides an urethane(meth)acrylate which can form a curing film having self-restortaion property, excellent anti-abrasion property, and low curing telescoping property, and anti-flexibility. The urethane(meth)acrylate mixture (C) is obtained through the reaction of a (A) polymeric polyoxyethylene derivative mixture and a (B) polyisocyanate compound expressed in formula (2), the (A) polymeric polyoxyethylene derivative mixture is composed of (A1) 85-95 mass% of polymeric polyoxyethylene derivative expressed in formula (1) and (A2) 5-15 mass% of (meth)hydroxyethyl acrylate. In the formula, R1 expresses hydrogen atom or methyl, n is an average addition mole number and n=3-9. In the formula, R3 respectively expresses alkylene with a carbon number in the range of 1-10.

The invention discloses a fabricated combined bridge deck structure provided with a grid type connector and a construction method thereof. The combined bridge deck structure is formed by assembling at least two steel plate-fiber concrete combined type components. Each steel plate-fiber concrete combined type component comprises a steel bridge deck slab located on the lower portion and prefabricated fiber concrete pieces poured on the steel bridge deck slab. One grid type connector is arranged in the butt joint area of every two adjacent steel plate-fiber concrete combined type components. The grid type connector comprises cast-in-place fiber concrete pieces and grid reinforcement components fixedly connected to the corresponding steel bridge deck. The grid reinforcement components is completely covered with the prefabricated fiber concrete pieces located on the two sides of the butt joint area and the cast-in-place fiber concrete pieces located in the butt joint area. The prefabricated fiber concrete pieces and the cast-in-place fiber concrete pieces are connected through the grid reinforcement components, so that an integrated fiber concrete layer is formed. The two adjacent steel bridge deck slabs are fixedly connected to form an integrated steel bridge deck slab layer.

The invention discloses a composite bulletproof material and a preparation method thereof. The composite bulletproof material comprises a face layer, a middle layer and a base layer, wherein the facelayer adopts light metal armor pieces or ceramic composite armor pieces, the middle layer is a flexible high-performance fiber fabric layer, fabric comprises aramid fiber or ultra-high-molecular-weight polyethylene fiber fabric, and the base layer is high-performance fiber fabric impregnated with a shear thickening fluid. The soft and hard composite bulletproof material has good impact resistanceand high bullet shear energy, the flexible high-performance fiber fabric layer as the middle layer has the characteristics of high strength and high flexibility and has high tensile strength and slipperformance in a high-speed bullet condition, the base layer is the high-performance fiber fabric composite impregnated with the shear thickening fluid, friction performance of yarn is improved, and more energy is absorbed. Absorbed energy of the composite bulletproof material at the bullet speed of 500 m/s is 94.85 J.

The invention discloses a two-degree-of-freedom sliding-type temporary supporting device and a working method thereof. The two-degree-of-freedom sliding-type temporary supporting device comprises a first supporting device, a second supporting device, a frame moving driving device and a frame moving auxiliary device. The first supporting device and the second supporting device are connected throughthe frame moving driving device and the frame moving auxiliary device. Under the joint effect of a bottom lifting device arranged at the bottom of the first supporting device and facilitating slidingand forward moving, the frame moving driving device and the frame moving auxiliary device, the sliding-type temporary supporting device automatically slides and moves forwards to the designated working position. The first supporting device and the second supporting device adopt two sets of structures which are connected and combined by three linear driving devices and hinges, so that a jacking support has two degrees of freedom. The problem that when the ground and the top face of a roadway are not parallel, the device is prone to overall skewing is solved, meanwhile, auxiliary equipment is not needed during frame moving, the pushing step pitch is large, supporting is safer and more reliable, and the two-degree-of-freedom sliding-type temporary supporting device and the working method thereof have the advantages that the work efficiency is high, the automation degree is high, and adaptability to the top face of the roadway is good.

A tread (11) of a tire (10) is provided with a plurality of blocks (12) to (15). The blocks (12) to (15) are provided symmetrically about an equator plane (E). Each of the blocks (12) to (15) is provided regularly in a circumferential direction. Each of the blocks (12) to (15) is formed to take a solid shape specified by a long side dimension (W), a short side dimension (L) and a high side dimension (H). The blocks (12) to (15) include recesses (21), (24), (27) and (28) respectively. Each of the recesses (21), (24), (27) and (28) is specified by a long side dimension (WR), a short side dimension (LR) and a deep side dimension (HR). The dimensions have a relationship of WR/W=0.33 to 0.87, LR/L=0.2 to 0.8 and HR/H=0.15 to 0.85. A ratio of a block volume (BT) to a recess volume (RT) is set to be RT/BT=0.08 to 0.25.

Embodiments relate to a polymer film for a display that maintains a clean appearance and transparency and is excellent in antiblocking properties by securing a certain range of optical slip index (OS), a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and a filler and has an optical slip index (0.5) of less than 0.5.

The invention relates to a cerium phosphate modified silicon carbide fiber reinforced silicon carbide composite material and a preparation method thereof. The method comprises the steps: (1) alternatively preparing a cerium phosphate interface layer and a silicon carbide interface layer on the surface of silicon carbide fiber preforms until the predetermined thickness or the predetermined number of layers is reached, and thus preparing modified silicon carbide fiber preforms; (2) impregnating the modified silicon carbide fiber preforms with a carbon precursor solution, and then solidifying andsplitting the impregnated modified silicon carbide fiber preforms in turn; (3) repeating the step (2) at least once, and thus preparing porous silicon carbide fiber preforms; and (4) carrying out liquid silicon melt-infiltration reaction of the prepared porous silicon carbide fiber preforms, and thus preparing the cerium phosphate modified silicon carbide fiber reinforced silicon carbide composite material. The prepared cerium phosphate modified silicon carbide fiber reinforced silicon carbide composite material has the advantages of excellent oxidation resistance, temperature resistance andthermal shock resistance, excellent comprehensive performance at high temperature and long service life.

The invention discloses a rubber seal with low temperature resistance, which relates to the technical field of seals and is made of the following components: EPDM rubber, natural rubber, calcium carbonate, paraffin, zinc oxide, ultrasonically modified starch, micron grade perlite, plasticizer, carbon black; the invention provides a rubber seal with low temperature resistance, which not only has good low temperature resistance, but also has good oil resistance and tear resistance.

The invention relates to a ratchet spanner for ensuring switching of a control part smoother, which adopts the following technical scheme that a first edge of a control slot is contacted with the outer periphery of a guide part of a reversing switch; and an included angle between a tangent line formed when the first edge is tangential to the guide part and a second reference line of the reversing switch is not more than 45 degrees. Therefore, if a user wants to shift the control part to a second position from a first position, most of the shifting force applied by the user to the control part can be used for pushing the guide part of the reversing switch and ensuring the reversing switch to rotate relative to a pivot slot and cannot cause the problem that the control part and the reversing switch are clamped or are not shifted to rotate smoothly. Therefore, the user can easily shift a shifting part of the control part so that the control slot drives the reversing switch to move.

The invention discloses a special flexible cable for a shield tunneling machine. The special flexible cable comprises a cabling wire core, thin non-woven fabric surrounding the cabling wire core, a reinforcing layer surrounding the thin non-woven fabric, and an outer sheath surrounding the reinforcing layer, wherein the cabling wire core comprises a saddle-shaped positioning pad core arranged at the center, three power wire cores which are tightly attached to the arc-shaped surface of the saddle-shaped positioning pad core and evenly distributed in the circumferential direction, and three grounding wire cores which are arranged in three external gaps formed by the three power wire cores. The thin non-woven fabric is arranged around the three power wire cores and the three grounding wire cores. The invention further provides a manufacturing method of the special flexible cable for the shield tunneling machine. The cable has excellent tensile strength, bending resistance, extrusion resistance, wear resistance, moving torsion resistance and repeated bending and winding performance, and is long in service life.

The invention relates to an electric cabinet and in particular to a drawer sliding mechanism of an electric cabinet. The drawer sliding mechanism comprises a drawer, a panel, an electric cabinet box body and an insertion cavity, wherein the panel is positioned at the front side of the drawer, the insertion cavity is formed on the electric cabinet box body, and the drawer is positioned in the insertion cavity and is matched with the insertion cavity to slide. The drawer sliding mechanism is characterized in that the mechanism further comprises supports positioned at two sides of the insertion cavity; the supports form a sealing surface with the panel at the front side of the drawer; tracks are arranged on side faces, opposite to the drawer, of the insertion cavity; and balls are arranged in the tracks. Compared with the prior art, the drawer sliding mechanism enables the sliding performance of the drawer to be improved, can avoid the phenomenon that the drawer cannot be closed after long-time use and enables the service life of the drawer to be prolonged.

The invention discloses a teeth part strengthening structure of a spiral bevel gear. The strengthening structure is a circle transition structure which is formed by tangency of a circular arc arranged between two adjacent tooth faces and the tooth faces at the two sides. The strengthening structure is characterized in that the midpoint of a circular arc line is tangent to a root circle, and the semidiameter R value of the circular arc is determined by three common tangency points; and the circle transition structure is designed at the tooth root position and has good mechanical property, thereby promoting strengths of bending resistance and cracking resistance of the tooth root and obviously reducing the stress concentration degree. According to the strengthening structure provided by the invention, a strengthening measure can be further implemented from the other two aspects besides the technology effect: firstly, the circle transition structure at the tooth root position provides convenience for adoption of a refined forging shaping process when forging and pressing are carried out, metal fibres are continuously distributed along the height direction of a tooth form, and the tooth part is of a longitudinal metal fibre structure, thereby effectively improving the gliding property of the tooth face and the shock resistance of the tooth part; and secondly, the circle transition structure at the tooth root position has no dead angles so as to conveniently carry out the shot peening strengthening on the tooth part. The strengthening structure provided by the invention has the advantages of reasonable structure and high strength, and is particularly suitable for being matched with a main reduction gear in a heavy vehicle driving axle.

This plastic container is characterized in that: at least an outer surface layer is formed of a transparent resin layer that is formed from a transparent resin or a colored resin layer that is obtained by blending a coloring agent in the transparent resin; and a protective film that contains 100 parts by mass of a silicone oil and 50-5,000 parts by mass of a surfactant is formed on the outer surface layer. This plastic container exhibits excellent scratch resistance and antifouling properties without being covered with a label such as a shrink film.

The invention discloses a die and a covered edge press fit mechanism thereof. The covered edge press fit mechanism comprises a covered edge driving cylinder installed on a fixed plate through a cylinder barrel of the covered edge driving cylinder, a telescopic rod of the covered edge driving cylinder penetrates a cylinder rod through hole in the fixed plate, the tail end of the telescopic rod is fixedly connected to an installing plate, and the installing plate is fixedly connected to a covered edge knife block. The fixed plate is installed on an installing base, and the lateral end face of the installing base is rotatably connected with a telescopic rod of a switchover cylinder through a driving shaft. The bottom end face of the installing base is rotatably connected with an installing support through a rotating shaft, the installing support is fixedly connected to a die body, and the rotating shaft is parallel to the driving shaft. A first control valve for controlling the covered edge driving cylinder to extend and a second control valve for controlling the switchover cylinder to extend are installed on the die body. The covered edge press fit mechanism is simple in structure and high in stability.

The invention relates to a sealing arrangement (30) for sealing a corner region (31) of a window (18) against a body part (16) of a motor vehicle (10). The sealing arrangement (30) defines a sealing plane (29) and a first sealing axis (24) and a second sealing axis (28) extending transversely to the first sealing axis. The sealing arrangement has a fastening section (36) for fastening to the bodypart (16) and a sealing section (34), which has a sealing lip (40) which can be elastically deflected transversely to the sealing plane (29) when the corner region (31) of the window (18) comes to bear against the sealing lip (40) and which extends in an arcuate manner from the first sealing axis (24) to the second sealing axis (28). The sealing lip (40) is in the form of a cast sealing lip (40) over the entire arcuate extension thereof.

The invention discloses a bridge support which comprises a lower support plate, a steel liner plate and an upper support plate. A protruding part is arranged in the middle of a lower spherical surface. A first spherical crown protruding upwards is arranged at the top end of the protruding part, the steel liner plate is a second spherical crown with the upper surface being a cut plane, a central blind hole is formed in the middle of the crown part of the second spherical crown, the hole type of the central blind hole is a spherical hole and the central blind hole is provided with an upper spherical surface. The spherical surface of the crown part of the second spherical crown is matched with the lower spherical surface to form a first spherical surface friction structure. The upper spherical surface is matched with the first spherical crown to form a second spherical surface friction structure. The lower surface of the upper support plate is matched with the cut plane. The bridge support is strong in slipping capacity and high in stability.

The invention belongs to the technical field of a measuring device and relates to a hydraulic pendulum bob force measuring mechanism used for detecting pressure strength of a cement test block. The force measuring mechanism comprises an upper box body, wherein a pendulum rod shaft is rotatably arranged on the upper box body, a front end of the pendulum rod shaft penetrates through an outer side of the upper box body, a shaft diameter is fixed with a pendulum rod flange seat, a pendulum rod is fixed on the pendulum rod flange seat through a fastening bolt, the pendulum rod shaft is arranged on a shaft in the upper box body and is fixedly connected with a pendulum rod shaft seat through a taper bolt, two ends of a connection rod shaft are rotatably arranged on the pendulum rod shaft seat through a bearing respectively, two ends of an outer side of the connection rod shaft corresponding to the pendulum rod shaft seat are respectively provided with a pull board, each pull board is respectively arranged along a length direction of the upper box body and penetrates through the outer side of the upper box body, and end portions of the pull boards which penetrate through the outer side of the upper box body are fixed with the pendulum rod shaft seat. Through the force measuring mechanism, a largest force is enabled to change according to weight change of a pendulum bob, the force measuring mechanism is converted to a load indication mechanism through calculation to acquire a measurement result, and an upper limit of measurement can reach above kilotons.