56results about How to "Withstand shock" patented technology

The present invention provides compositions, including die attach adhesives, coatings and underfill materials, which are useful in electronics packaging and the composite fields. Specifically, the invention provides liquid and very low melting epoxy-maleimide compositions that co-cure upon the addition of an anionic cure catalyst in the absence of any other cure catalyst.

The invention discloses a method and a device for winding and forming a rough yarn after a bobbiner is full of yarn. The method comprises that: if the length of a residual rough yarn is in accordance with a preset value, controlling the bobbiner to spinning at a reduced speed; if the length of a yarn spun at a low speed is in accordance with a preset value, controlling a flier motor, a drafter motor and a bobbin rotating body motor to rotate at a low speed, a lower keel motor to rotate at a high speed and the yarn to be distributed at a thread pitch; when the yarn reaches a full-yarn forming upper part of the bobbin, stopping the flier motor, the drafter motor and the bobbin rotating body motor and controlling the lower keel motor to rotate at a high speed; when the yarn reaches the full-yarn forming top end of the bobbin, stopping the lower keel motor, keeping the position of the lower keel, controlling the flier motor the drafter motor and the bobbin rotating body motor to rotate at a low speed, winding the yarn on the full-yarn forming top end of the bobbin and stopping all motors; and controlling the bobbin rotating body motor to rotate reversely, the lower keel motor to rotate and move upward, and breaking the yarn to complete the winding and forming of rough yarn after the bobbiner is full of yarn. The device comprises a draft detection part, a main control unit, a programmable controller, a variable speed controller, a filer, the lower keel and a detection device, wherein the lower keel is provided with bobbin rotating body and the bobbin; and the effect of rough yarn winding and forming after the bobbiner is full of yarn is ideal and free from falling.

The invention discloses an active protection headrest device for automobile roof collapse deformation and a control method of the active protection headrest device. The headrest device comprises a headrest protection mechanism and an electric control system. The headrest protection mechanism comprises a headrest hinged to a headrest rotary shaft through a headrest supporting column. An arc baffle is installed in an arc slide way inside the headrest. A headrest clamping release mechanism is arranged in a seat. A baffle ejection drive device is arranged at the bottom of the seat. A headrest support is arranged at the position, in front of the headrest supporting column, in the seat. The electric control system comprises an infrared distance measurement sensor and a controller. By means of the headrest device, the degree of crash deformation of an automobile roof can be detected automatically, the seat and the headrest are controlled to rapidly incline forwards, the arc baffle pops out automatically and rapidly, a protection device can be formed above the head of a passenger instantly, impact from the position above the passenger is resisted effectively, and the survival rate of the passenger is increased. By means of the control method of the active protection headrest device, it is effectively avoided that due to interference signals of the sensor, the controller operates by mistake, and the passenger is protected accurately and effectively by the headrest device.

The invention discloses high-strength composite fiber non-woven cloth and a preparation method thereof. Ultrahigh-strength high-modulus polyethylene fibers are used as base materials, the polyethylene fiber obtained after fiber placement is subjected to a series of homogenization, parallelization and straight and upright arrangement and placed in a modified epoxy resin solution for sizing treatment in an environment of 60-80 DEG C, then the formed polyethylene fiber layers are subjected to composite lamination, and the non-woven cloth is prepared, wherein the modified epoxy resin solution is prepared by adding and mixing an adhesion agent, a filling agent, an insulating filler, fire retardant, white carbon black and ethyl alcohol, the mass of hydroxyl chemigum accounts for 8-12% of the mass of the modified epoxy resin solution, and the content of vinyl cyanide accounts for 18-30% of the content of hydroxyl chemigum. The non-woven clothes with different thicknesses are prepared by lamination of the polyethylene fiber layers, an antiknock device can be made from different types of non-woven cloths according to explosion sites and use environment, and the non-woven cloths with different thicknesses are different in anti-explosion range so as to sufficiently withstand the impact of a bullet.

The invention relates to a water-land amphibious barrel-shaped robot which belongs to the technical field of mechanical and electronic integration and consists of a propelling wheel shell, an interior driving device, a work platform, a sealing element and a connecting piece. A driving mechanism inside a propelling wheel consists of a gear motor, a support plate and a balancing weight. The main shafts of two propelling wheels are connected by two fixedly connected rhombus mounted bearings to make the two wheels have independent revolving speed. A transparent shell is adopted, the outer side of the shell is provided with a T-shaped blade, and the inner side is provided with a solar energy piece. A work platform between the two propelling wheels can be used for installing a work tool. The modular design is adopted, and two sides of the propelling wheels can be connected in series with another propelling wheel. The water-land amphibious barrel-shaped robot has good maneuverability and strong work capacity, and can be used for the fields of amphibious detection and transportation.

The invention discloses a platform moon pool damping device which comprises a shock absorption cabin and a shake absorption cabin which are arranged on the transverse inner walls at the two ends of a moon pool and separated through a watertight separation board. Multiple rows of damping blocks distributed in a staggered manner are transversely arranged on the outer wall of the shock absorption cabin and the outer wall of the lower portion of the shake absorption cabin respectively. Multiple wave stop columns are arranged on the outer wall of the lower portion of the shake absorption cabin. Three separation boards are arranged in the shake absorption cabin from top to bottom. Multiple rows of vertical wave elimination blocks horizontally distributed in a staggered manner are transversely arranged on the upper sides and the lower sides of the separation boards and the inner wall of the shake absorption cabin bottom. The separation boards are provided with vertically-corresponding wedge blocks towards the outer end of the platform moon pool. Multiple rectangular openings are formed in the shock absorption cabin outer wall and a vertical wall board of the shock absorption cabin respectively. Multiple rows of horizontal wave elimination blocks vertically distributed in a staggered manner are transversely arranged on the inner walls of the two longitudinal ends and a vertical wall board of the moon pool. The shock absorption cabin and the shake absorption cabin can guarantee that a platform works safely and stably under different working conditions. The wave stop columns arranged on the outer wall of the lower portion of the shake absorption cabin can effectively resist incoming flow impact, the kinetic energy of waves is weakened, incoming flow is inducted to move towards the bottom of the moon pool, and formed vortexes in the moon pool are reduced.

An isochronous pivot for a resonator including two flexible strips joining attachment points of a first and a second element, defining two strip directions, and a pivot axis, at the intersection of their projections or at their intersection, each strip having a free length between its attachment points, and an axial distance between the pivot axis and the attachment point thereof farthest from the axis, the attachment point ratio X=D/L being greater than one for each strip, the strip directions defining with the axis a first apex angle whose value in degrees includes between f1(X)=108+67/(10X−6), and f2(X)=113+67/(10X−6).

The invention provides a riverway ecological restoration system and restoration method, and belongs to the technical field of riverway restoration. The riverway ecological restoration system comprisesa riverway, the riverway comprises shoals and deep pools, the shoals comprise slow flow shoals and rapid flow shoals, a spur dike (1) is arranged at each rapid flow shoal, a bottom protection fixinggroove (2) is arranged at each deep pool, and aquatic plants (3) are planted at the slow flow shoals. According to the riverway ecological restoration system, by changing the waterpower condition of the riverway, the topographic characteristic that deep pools and shoals are alternated is formed, animals can inhabit conveniently, a healthy food chain of the river can be constructed, a riverway foodnet is formed, and the biodiversity of the riverway and the surroundings is enriched. The restoration method of the riverway adopts an ecological means, so that the ecological system of the riverwayis kept in a balanced state, the biodiversity is maintained, and the method is suitable for large-scale popularization and application.

The invention discloses a safety protection screen for an excavation working face. The safety protection screen (90) is prepared from polyester fiber reinforced plastic; an upper end telescoping rod (20) and a lower end telescoping rod (30) are respectively arranged at the upper end and the lower end of the safety protection screen (90). The safety protection screen (90) further comprises four hooks which are matched with the upper end telescoping rod (20) and used for suspending the upper end telescoping rod (20); top points are arranged at two ends of the lower end telescoping rod (30); the safety protection net (90) and the upper end telescoping rod (20) are bound through iron wires. With the adoption of the safety protection net, coal briquettes falling from the excavation working face can slide down along the protection net, and thus the excavation working face is avoided dangerous state.

The invention discloses a high-speed unwinding machine. The machine comprises a box body, a spool is arranged in the box body, a protective door is arranged outside the box body, one side of the spool is coaxially connected with a sliding sleeve, the sliding sleeve is driven by a jacking air cylinder to tightly jack the spool, the sliding sleeve is sleeved with a sliding sleeve seat, the sliding sleeve seat is fixed to the box body, a main shaft is driven by power on the other side of the spool, a shifting pin inserted into the spool is arranged on the main shaft, and the shifting pin shifts the spool to rotate; and a pneumatic falling preventing mechanism is arranged in the box body and comprises a one-way linear driving mechanism, a connecting rod I and a connecting rod II are hinged to the tail end of the one-way linear driving mechanism, the connecting rod I is hinged to the box body, a brake pad seat is hinged to the tail end of the connecting rod II, a brake pad is fixedly connected to the brake pad seat and located above the sliding sleeve, and the one-way linear driving mechanism drives the brake pad to press the sliding sleeve through the connecting rod II. According to the machine, the automation degree of the high-speed unwinding machine is improved, and potential safety hazards caused by the fact that the spool is not completely locked are eliminated.

The invention discloses a novel assembly type landscape overflow weir, and belongs to the field of overflow weirs. When the novel assembly type landscape overflow weir is used, it is ensured that theoverflow weir has the certain overflow capacity. When the novel assembly type landscape overflow weir is designed, the enough orifice size shape and high flow coefficient are achieved, so that the novel assembly type landscape overflow weir has the enough overflow capacity, the good orifice shape is achieved during designing, water can smoothly flow through the weir, harmful negative pressure, vibration, cavitation erosion and the like are not generated, it is ensured that local scouring damaging the safety of a weir body is avoided at an underwater bed, the position where the overflow weir section is located in the pivot should make the downstream water flowing state be smooth, reflection and scour flow is avoided, and normal operation of other buildings in the pivot is not affected and is in the working process.

The invention discloses a composite fiber, a composite board and a method for preparing the composite board. The composite fiber is composed of a core material and a shell, wherein the shell is encircled and formed around the core material; the melting temperature of the shell is lower than that of the core material; and the strength of the shell is higher than that of the core material. Accordingto the composite fiber, the composite board with high the characteristics such as impact strength, easy molding, low extension, light weight and high heat resistance simultaneously can be prepared, so that the requirement of sport protection is met.

The invention relates to a self-locking slope protection brick. The self-locking slope protection brick comprises a bottom plate and lock hooks symmetrically arranged at the two ends of the bottom plate. The cross sections of the lock hooks are of right trapezoid structures. The short bottom edges of the right trapezoid structures are fixedly connected with the bottom plate, and an inserting slotis formed between each long side edge and the bottom plate. The center of the bottom plate is further provided with a protruding baffle, and the baffle and slots in the two sides form spaces for storing lock hooks of another self-locking slope-protection brick in a matched manner correspondingly. The self-locking slope protection brick is fabricated by the raw materials of, in weight, 40-50 partsof broken stones, 20-25 parts of cement, 5-13 parts of siliconmanganese slag, 1-2 parts of a modifying agent, 0.5-1 part of a polycarboxylate water-reducer, 1-2 parts of ethylene diamine tetra methylene phosphonic sodium and 2.8-6 parts of water. The self-locking slope protection brick is simple and reasonable in structure, convenient and fast to prepare, mutual self-locking can be achieved, impact of a slope body can also be resisted effectively, and large-area landslide is avoided.

The invention provides an amphibious barrel-shaped robot, and belongs to the technical field mechanical and electrical integration. The amphibious barrel-shaped robot is composed of pushing wheel shells, an interior driving device, a work platform, a seal piece and a connecting piece. Driving mechanisms in pushing wheels are composed of gear motors, supporting plates and balancing weights. Two pushing wheel main shafts are connected by two rhombus plummer blocks which are fixedly connected, so that two wheels have independent revolving speed. Transparent shells are adopted, T-shaped blades arearranged on the outer sides the shells, and solar pieces are arranged on the inner sides of the shells. The work platform between the two pushing wheels is used for installing work tools. A modular design is adopted, and the two sides of one pushing wheel can be in series connection with the other one pushing wheel. The amphibious barrel-shaped robot is good in maneuverability and high in work capacity, and can be used in amphibious detection and transportation field.