47results about How to "Reduce direct force" patented technology

The invention discloses a bending-adjustable conveying system for an interventional cardiac valve. The system comprises an outer sheath tube, an core tube assembly which is arranged in the outer sheath tube and can relatively slide in the axial direction and an operation handle connected with the proximal ends of the outer sheath tube and the core tube assembly; a tube body of the outer sheath tube is provided with a distal end and the proximal end, the handle is connected with a traction wire for pulling the distal end of the tube body to bend, a distal end of the traction wire is connected with the tube body, the connection part is located at the distal end of the tube body or is adjacent to the distal end of the tube body, and at least one section of the traction wire is a free sectionwhich is free outside the tube body; the system is further provided with floating limit strips, proximal ends of the floating limit strips are starting ends fixedly arranged opposite to a fixing heador the core tube assembly, and the floating limit strips float between a mounting portion of the interventional cardiac valve and the outer sheath tube; the outer wall of the fixing head is provided with a positioning part used for being matched with a connecting lug of the interventional cardiac valve, the connecting lug is completely released in front of the outer sheath tube, and the floating limit strips are bound by the outer sheath tube to keep the cooperation between the connecting lug and the positioning portion.

The invention provides a pile and net separated large-scale shallow sea purse net culture device. The culture device comprises a purse net, an assistant floating ball connected to the surface of the purse net and a column pile connected with the purse net, wherein the top end of the purse net is connected with the column pile, a fixing pile and a sinking block are connected to the bottom of the purse net, the assistant floating ball on the surface of the purse net is connected with a main floating ball, and the main floating ball is connected with an anchor pile. By adopting the column pile and purse net separated structure, direct stress on the net in water under the action of waves and tides can be well reduced, and the flexibility of the purse net can be fully exerted; the bottom end of the purse net is tightly attached to the sea bed through the fixing pile and the sinking block, cultured fishes can be effectively prevented from escaping, and the manufacturing cost of the culture device is reduced; stress on the purse net in the water is further regulated through the main floating ball and the assistant floating ball, the flexibility of the purse net is exerted to the greatest degree, and thus the culture device can adapt to the harsh and complex marine environment.

The invention discloses a recyclable conveying system for interventional heart valves with a stable operation function. The recyclable conveying system comprises a core pipe assembly, an outer sheathing pipe, a handle and a floating limiting strip, wherein the outer sheathing pipe is arranged at the periphery of the core pipe assembly; the handle is used for controlling the core pipe assembly andthe outer sheathing pipe and is relatively slide along the axial direction of the outer sheathing pipe; a first control mechanism and a second control mechanism are arranged along the axial directionof the handle and are used for respectively adjusting the axial positions of the outer sheathing pipe and the core pipe assembly; a guide head and a fixed head are fixedly arranged on the outer pipe assembly, the guide head is fixedly arranged at the far end of the core pipe assembly, the near end of the core pipe assembly extends out of the fixed head, and an interventional heart valve installation position is formed between the guide head and the fixed head; the near end of the floating limiting strip is used as a starting end which is fixed corresponding to the fixed head or the core pipe assembly; the floating limiting strip is floated between the interventional heart valve installation position and the outer sheathing pipe; the outer wall of the fixed head is provided with a positioning part which is matched with a connecting lug of the interventional heart valve.

The invention discloses a wheelchair for middle-aged neck and back massage. The wheelchair comprises a base, a substrate, a backrest base and a headrest base. The headrest base is located at the top end of the backrest base, an inner cavity of the headrest base is divided into an operation cavity and a soft layer, the front plane of the headrest base is the elastic leather layer, the elastic leather layer is located at the surface of the soft layer, a fixing rod is installed in the middle of the operation cavity, a plurality of limiting sleeves are installed on the fixing rod, a transmission rod is transversely installed at the bottom of the operation cavity, a transmission motor is installed at the side wall of the headrest base, the transmission rod is connected with a motor shaft of thetransmission motor through a coupler, the transmission rod is provided with a plurality of concave connecting rods, transmission push rods penetrate through the limiting sleeves, and the bottom endsof the transmission push rods are connected with the concave connecting rods through connecting sleeves; massage is performed in an elastic material wriggle mode, the direct acting force on the neck can be reduced to the minimum extent, and the safety massage effect is achieved.

The invention provides a pile-net separating type large-scale shallow aquaculture purse net, which comprises a purse net, a floating ball and a pile. The top end of the purse net is connected with the pile; a floater is connected to the purse net; a fixed pile is arranged on the bottom part of the purse net; the floating ball is connected with the floater, and is connected with an anchor pile through an anchor line; an iron chain and a garbage collecting trough are connected to the bottom part of the purse net; an inclined hole is formed in the bottom part of the pile; an inclined inserting rod is arranged in the inclined hole; the top end of the purse net is connected with the pile through a pipe hoop, and the connecting part is higher than a high water level; a connecting pipe is arranged in the floating ball; a water quality monitor and a solar panel are arranged on the pile; a concentric eccentric hole is formed in the anchor pile; and a sandbag is further arranged on a connecting part of the purse net and a shoreside. An anchor pile structure is innovatively adopted on the bottom part of the purse net, and the iron chain tied on a netting on the bottom part of the purse net and the garbage collecting trough are tightly paved on a sea bed, so that the bottom part is ensured to be sealed, fishes are prevented from escaping, and part of marine litters can be collected. The pile-net separating type large-scale shallow aquaculture purse net provided by the invention can be used for monitoring culture water quality, is not easy to damage, can be used for collecting the marine litters, and is high in escape prevention.

The invention discloses an interventional cardiac valve conveying device capable of repeating positioning. The device comprises a core tube, a guiding head and a fixing head are fixed to the core tube, and an interventional cardiac valve mounting position is arranged between the guiding head and the fixing head; the outer periphery of the interventional heart valve mounting position is provided with an axially slidable outer sheath tube and a floating limit strip, the proximal end of the floating limit strip is a fixedly arranged start end with respect to the fixing head or the core tube, anda movable limit strip floats between the interventional cardiac valve mounting position and the outer sheath tube; the outer wall of the fixing head is provided with a positioning portion for cooperating with a connecting ear of an interventional cardiac valve, and before the connecting ear is completely released out the outer sheath tube, the floating limit strip is bound by the outer sheath tubeto maintain cooperation between the connecting ear and the positioning portion; the outer sheath tube includes an inner layer, an intermediate layer and an outer layer in order from inside to outside, the intermediate layer includes, from the distal end to the proximal end, a first segment, a second segment and a third segment, the first segment is of a hollow structure, and the hollow structureincludes at least two hollow units.

The invention discloses a coal mine underground reservoir assembly type arc-shaped artificial dam body and a construction method thereof. The artificial dam body is arranged between adjacent coal pillar dam bodies, wherein the artificial dam body is composed of a dam body base, wing plates on the two sides and an arc-shaped dam body, the dam body base, the wing plates and the arc-shaped dam body are all formed by assembling a plurality of modules, the dam body base is provided with grooves for embedding the wing plates on the two sides and the arc-shaped dam body, the wing plates on the two sides are also provided with grooves for embedding the arc-shaped dam body, the dam body base and the wing plates are provided with anchor rods, and the artificial dam body and surrounding rock mass can form a stable whole. The convex face of the arc dam body faces the underground reservoir, force is partially decomposed to the coal pillar dam bodies on the two sides, direct stress of the dam body is reduced, and therefore the thickness of the dam body is reduced; and by quantifying the size of the artificial dam body, building a standard dam body module on the ground and quickly assembling underground, the problems of long construction period and high manufacturing cost of the underground reservoir of the coal mine are solved, and the dam body can be prevented from instability damage and water seepage.

The invention discloses an offshore wind power scour pit self-repairing device with a micro-ecological breeding function, and belongs to the technical field of offshore wind power engineering. The self-repairing device comprises an upper flow blocking breeding device, a lower mud storage device and a connecting rope. The upper flow blocking breeding device is arranged around the pile foundation and is slightly higher than the upper edge of the scouring pit; the lower mud storage device is located below the upper flow blocking breeding device, arranged in the washing pit and connected with the upper flow blocking breeding device through a connecting rope. The upper flow blocking breeding device comprises floating balls, mooring ropes, seedling breeding transverse rods, a turning plate structure, a sediment chamber and a net cage chamber. The floating ball is connected above the sediment chamber through a cable; the net cage chamber is arranged below the sediment chamber; the seedling-raising cross rod is horizontally arranged at the top of the sediment chamber; the lower sludge storage device comprises a net box cage and a sludge storage chamber, and the sludge storage chamber is arranged below the net box cage. The silt is stored in the breeding device, loss of the silt near the scouring pit is reduced, the stored silt is used for filling the scouring pit, and self-repairing is achieved.

The invention provides obstetric forceps comprising a forcep handle and two forcep rods; each forcep rod is divided into a fixed segment and a connecting segment, a lower end of the fixed segment is mounted on the forcep handle, a lower end of the connecting segment is mounted on an upper end of the fixed segment, two connecting segments form U-shaped forcep rods, forcep head groups are respectively mounted on an upper end and a middle part of each connecting segment and are arranged on an inner side of each forcep rod, outer sides of the two forcep rods are provided with force applying rods,lower ends of the two force applying rods are fixedly mounted on two sides of the forcep handle, top parts of the two force applying rods are provided with first support rods, second support rods arearranged below the two first support rods, the two force applying rods are fixedly connected on outer sides of the forcep rods via the first support rods and the second support rods, and skid resistance platforms are mounted on outer sides of the force applying rods. In the obstetric forceps disclosed in the invention, force application positions of the obstetric forceps are changed, force is applied via the force applying rods, and damage caused by excessive force application during neonate clamping operation can be prevented.

The invention discloses a connecting piece for partition walls, belonging to the technical field of connecting pieces. The connecting piece comprises a framework piece I and a framework piece II, wherein each framework piece is composed of a panel, a convex part, a butting part and an extension part, and further comprises silica gel filled in each framework piece, one end of each panel and one end of the corresponding convex part are welded together, the other end of each convex part is welded on one end of the corresponding butting part, the other end of each butting part and one end of the corresponding extension part are welded together, the panel of the framework piece I is fixed on a floor slab face and a floor board face, and the panel of the framework piece II is fixed on columns at two sides and a wall face. Every two adjacent panels of the framework pieces I and II are fixed together through a fixing sheet; and the fixing sheets are L-shaped reinforcement fixing sheets. The connecting piece disclosed by the invention has the beneficial effects that the assembly operation of a structure can be completed rapidly by using tools such as gunpowder striking nails and a self-tapping screw gun, in addition, after the structure is filled with the silica gel, shock can be buffered by using the self elasticity of surplus silica gel spreading all over the structure body, thus, the direct stress to self-tapping screws is reduced, and the panels are prevented from breakage.

The invention discloses a buffer type weighing sensor module, comprising a weighing sensor, a sensor pressure head and a buffer device, wherein the sensor pressure head is arranged on the weighing sensor. The buffer type weighing sensor module is characterized in that a buffer mechanism is arranged on the sensor pressure head, the buffer mechanism comprises an upper base plate, a disc spring set and a lower base plate positioned on the sensor pressure head, and the disc spring set is positioned between the upper base plate and the lower base plate, a limiting mechanism is arranged between the upper base plate and the lower base plate. The buffer type weighing sensor module has the advantages that the field application performance of the wide-range structure weighing sensor in large-load and high impact occasions is improved, the problem that the service life and the accuracy of the weighing sensor are influenced by the high impact load is also solved; and the buffer type weighing sensor module adopts a novel weighing sensor installation module structure and has significant effect on weighing systems adopting traveling cranes to place material to be weighed in the metallurgy, harbor and large material weighing fields.

The invention relates to a bidirectional piezoelectric ceramic and electrorheological fluid self-coupling damper. The damper is mainly composed of a piezoelectric energy supply part and a damping cavity part. Springs and pressure spring plates are symmetrically arranged relative to a set of piezoelectric ceramics. When a piston rod is subjected to external vibration, the pressure spring plates andthe springs which are symmetrically arranged up and down move along with the piston rod to apply pressure to the piezoelectric ceramics to generate voltage. In the compression and recovery two-way stroke, the piezoelectric ceramics are pressed all the time to generate the induced voltage and connected to an inner electrode and an outer electrode through wires, an electric field is generated between an annular damping channel, the viscosity of electrorheological fluids between the inner electrode and the outer electrode is increased under the action of the electric field, and an upper cavity and a lower cavity of the damper form pressure difference so as to reduce vibration of a piston. The larger the vibration amplitude of the piston is, the higher the generated voltage is, and the largerthe resistance generated by the electrorheological fluids is, so that the purpose of self-coupling vibration reduction of the system is achieved. According to the damper, the number of the piezoelectric ceramics is reduced, the effect of two-way power supply is still achieved, the utilization efficiency of the piezoelectric ceramics is improved, and the space is saved.

The invention provides a mountainous highway cliff-falling-preventing traffic protection structure, which belongs to the field of mountain highway traffic facilities, and comprises a curb cliff-impact-prevention device, a bottom mounting support seat, a cliff-impact-prevention protection structure, a rotary turning anti-collision soft column, a combined buffer rebound net layer, a reinforcing support plate, a silica gel outer pad, a rubber energy dissipation ring column, a rock wool pad and a soft fabric layer, wherein the base base plate is arranged on the uppermost portion, the two verticalrows of fixing holes are formed in the left side of the base base plate, the vertical rows of lower inserting holes are formed in the right side of the base base base plate, the installation verticalplate is arranged below the base base base plate and perpendicularly connected with the base base base plate, and the row of installation holes are formed below the installation vertical plate. The mountainous highway cliff-falling-preventing traffic protection structure is advantageous in that the mounting operation is remarkably simplified; the mountainous highway cliff-falling-preventing traffic protection structure is high in assembly speed, capable of being replaced quickly, quite convenient to disassemble industrially, good in overall structure coordination and connection performance, capable of effectively draining water and retarding flame, and capable of damping and dissipating energy to greatly buffer impact force, improving the safety performance of a vehicle body and reducing energy exchange between the vehicle body and the anti-collision guardrail.

The invention discloses a construction method for a reinforced soil drainage composite revetment structure. The method includes the following steps that first, a slope body to be protected is excavated; second, the revetment structure is laid on the surface of the excavated slope body and comprises a gravel drainage layer, a reinforced soil layer and a slope protection layer, in particular, the gravel drainage layer is laid on the surface of the slope body, the reinforced soil layer is arranged outside the gravel drainage layer, then a slope toe wall is adopted for reinforcing the bottom of the slope body, and the slope protection layer is laid outside the reinforced soil layer ultimately; and third, after the slope protection structure is laid, green plants are planted on the slope protection layer. Compared with the prior art, the construction method has the advantages of being simple in structure, convenient to construct, economical in cost, excellent in protecting effect and the like.

The invention discloses a pair of anti-collision finger protection full-finger gloves. Each glove comprises a glove body, wherein five fingers are arranged on the glove body, and protection layers are arranged in the inner layer of the front end of each finger in the five fingers and are made of soft plastics. According to the scheme, the protection layers are arranged at the front ends of the fingers for protecting the fingers, during the collision with the fingers, the protection layers realize the impact fore buffering effect, the direct stress of the fingers is reduced, and the fingers are protected from being injured.

The present invention provides a billboard placement rack with various functions and capable of placing multiple billboards at the same time. The upper end extends out of the support column, and the upper end of the rotating shaft is connected with a first rotating disk and a second rotating disk, the first rotating disk is located below the second rotating disk, and the upper surface of the first rotating disk and the lower surface of the second rotating disk are provided with Evenly distributed card slots, billboards are inserted into the card slots, photovoltaic panels are installed on the upper surface of the second rotating disk, batteries are installed on the support columns, the photovoltaic panels and batteries Connected by wires, a light-emitting element electrically connected to the storage battery is arranged on the upper surface of the base plate; multiple billboards can be placed at the same time, the operation is simple, convenient and quick, and the direct force of strong wind on the billboards is effectively reduced. Green and environmentally friendly, it improves the viewing effect of billboards at night.

The invention discloses a self-locking integrated anterior cervical board, and belongs to the technical field of medical apparatuses. The self-locking integrated anterior cervical board comprises an anterior cervical board body, a clasp and a universal screw. The anterior cervical board body is provided with a locking hole, the hole wall of the locking hole is a spherical surface provided with first sawteeth. The clasp has an opening, the outer wall of the clasp is a second spherical surface provided with sawteeth, the clasp is mounted in the locking hole via elastic deformation, and the first spherical surface and the second spherical surface are mutually embedded via the first sawteeth and the second sawteeth. The inner wall of the clasp is provided with a fist thread. The side wall of the head of the universal screw is a conical surface, the side wall of the head is provided with a second thread matching the first thread, the head of the universal screw is screwed into the clasp through cooperation of the first thread and the second thread. The self-locking integrated anterior cervical board is good in integration, the anterior cervical board will not loosen and fall off, the anterior cervical board can be locked twice through retreating a nail. The self-locking integrated anterior cervical board is easy to operate and safe in operation, and by adopting the self-locking integrated anterior cervical board, an operation is short in time, stimulation to esophagus and foreign body sensation can be reduced after the operation.

The invention discloses a multi-row hole building block production device. The multi-row hole building block production device comprises a mold frame and mold post assemblies; a forming cavity is arranged in the mold frame; an opening is formed in the upper surface of the forming cavity; the multiple mold post assemblies can be inserted into the forming cavity along the opening; and each mold postassembly comprises a mold post body with a multi-stage contraction structure, wherein the mold post body can be drawn out of the forming cavity through the multi-stage contraction structure. The invention also discloses a multi-row hole building block production method. According to the multi-row hole building block production device and the multi-row hole building block production method, withdrawal of the mold post bodies is realized through plug pins, the direct acting force on the mold post bodies when the withdrawal resistance is overcome can be effectively reduced, the pulling force during withdrawal mainly acts on the plug pins, the service life of the mold post bodies can be prolonged, and the risk cost can be reduced.

The invention provides an anti-collision structure of an outer side guardrail of a sharp turn lane, and belongs to the field of road traffic facilities. The structure comprises a right-angle sharp turn lane, an outer side guardrail, a floating body, a rotating device, energy dissipation layers, a light thin-wall energy dissipation pipe, a light energy dissipation material, an elastic rotating shaft, rubber rotating columns, an upper sealing plate, a roller, a rolling shaft, a damping elastic steel frame, a smooth continuous transition belt, a binding penetrating rope and built-in filling softwadding. In the anti-collision structure of the outer side guardrail of the sharp turn lane, the outer side guardrail is arranged on the outer side of the right-angle sharp turn lane, the floating body is arranged on the inner side of the outer side guardrail; the several rubber rotating columns are arranged, and two thirds of the volume of each rubber rotating column is arranged in the floating body; and the anti-collision structure has the advantages that the acting time of a vehicle and the outer side guardrail can be prolonged through the multiple energy dissipation layers, the arranged rotating device and the rubber rotating columns are beneficial for fully changing the moving direction of the vehicle, the guardrail can be protected, the vehicle can be protected, and impact force is changed into rolling friction to the maximum extent.

The invention relates to the technical field of punch presses, and particularly discloses a toggle joint type precision punch press. The toggle joint type precision punch press comprises a motor, a crankshaft driven by the motor, a toggle joint type transmission mechanism, and a downward pressing assembly, wherein the toggle joint type transmission mechanism comprises a connection rod, an upper rotating board and a lower rotating board; the first end of the connection rod is rotationally connected with the crankshaft; the upper end of the upper rotating board is used for being rotationally connected with an upper fixing shaft; the second end of the connection rod, the lower end of the upper rotating board and the upper end of the lower rotating board are coaxially and rotationally connected; the lower end of the lower rotating board is rotationally connected with the top of the downward pressing assembly; and the downward pressing assembly vertically moves in the vertical direction under driving of the toggle joint type transmission mechanism. According to the toggle joint type precision punch press, the toggle joint type transmission mechanism is arranged, horizontal movement of the connection rod is converted into vertical movement of a slide block, on the one hand, direct stress on the crankshaft is reduced to protect the crankshaft, and on the other hand, the punching precision can be improved.

The invention relates to a connected building. The connected building comprises main frame structures, orridor structures, longitudinal limiting components and transverse limiting components; two or more main frame structures are arranged side by side, the corridor structures are arranged between every two adjacent main frame structures, and the ends of the corridor structures are in lap joint with the main frame structures through buffer limiting structures; the longitudinal limiting components are arranged on the side edges of the buffering limiting structures and used for limiting longitudinal translation of the corridor structures in the length direction; the transverse limiting components are arranged on the side edges of the buffering limiting structures and used for limiting transverse translation of the corridor structures in the width direction; and the limiting directions of the two longitudinal limiting components located at the two ends of the corridor structures are opposite, and the limiting directions of the two transverse limiting components located at the two ends of the corridor structures are opposite. According to the connected building, the corridor structuresdo not affect the main frame structures, can be firmly connected with the main frame structures and are not prone to falling off from the main frame structures.

The invention discloses an anti-washing mechanism for a heat exchanger. The heat exchanger comprises a first barrel, a heat exchange tube, a feeding opening and a feeding tube; the heat exchange tube is arranged in the first barrel; the feeding opening is formed in a side wall of the first barrel and is used for feeding a heat exchange medium into the heat exchanger; and the feeding tube communicates with the feeding opening. The anti-washing mechanism comprises a second barrel and an anti-washing plate, wherein the second barrel penetrates in the feeding tube; one end of the second barrel is positioned in the first barrel; the anti-washing plate is arranged on the second barrel and is close to one end of the heat exchange tube; the anti-washing plate is recessed in the direction away from the shaft axis of the first barrel to form a concave-surface plate; and the heat exchange tube is positioned on a concave-surface side of the concave-surface plate. The anti-washing plate is the concave-surface plate, the stress surface of the concave-surface plate is redistributed along a concave surface, a direct acting force of fluid to the anti-washing plate is reduced, and a welded joint of the anti-washing plate is prevented from dropping; and by a plurality of first through holes and a plurality of second through holes, air flow uniformly enters the heat exchanger, the impact force to the anti-washing plate is reduced, erosion of large air flow to the heat exchange tube is avoided, the heat exchange tube is protected, and the heat exchange efficiency is improved.

The invention relates to the technical field of punch presses, and particularly discloses a toggle joint type precision punch press. The toggle joint type precision punch press comprises a motor, a crankshaft driven by the motor, a toggle joint type transmission mechanism, and a downward pressing assembly, wherein the toggle joint type transmission mechanism comprises a connection rod, an upper rotating board and a lower rotating board; the first end of the connection rod is rotationally connected with the crankshaft; the upper end of the upper rotating board is used for being rotationally connected with an upper fixing shaft; the second end of the connection rod, the lower end of the upper rotating board and the upper end of the lower rotating board are coaxially and rotationally connected; the lower end of the lower rotating board is rotationally connected with the top of the downward pressing assembly; and the downward pressing assembly vertically moves in the vertical direction under driving of the toggle joint type transmission mechanism. According to the toggle joint type precision punch press, the toggle joint type transmission mechanism is arranged, horizontal movement of the connection rod is converted into vertical movement of a slide block, on the one hand, direct stress on the crankshaft is reduced to protect the crankshaft, and on the other hand, the punching precision can be improved.

The invention discloses a buffer type weighing sensor module, comprising a weighing sensor, a sensor pressure head and a buffer device, wherein the sensor pressure head is arranged on the weighing sensor. The buffer type weighing sensor module is characterized in that a buffer mechanism is arranged on the sensor pressure head, the buffer mechanism comprises an upper base plate, a disc spring set and a lower base plate positioned on the sensor pressure head, and the disc spring set is positioned between the upper base plate and the lower base plate, a limiting mechanism is arranged between the upper base plate and the lower base plate. The buffer type weighing sensor module has the advantages that the field application performance of the wide-range structure weighing sensor in large-load and high impact occasions is improved, the problem that the service life and the accuracy of the weighing sensor are influenced by the high impact load is also solved; and the buffer type weighing sensor module adopts a novel weighing sensor installation module structure and has significant effect on weighing systems adopting traveling cranes to place material to be weighed in the metallurgy, harbor and large material weighing fields.

The invention relates to an automobile seat backrest lock capable of achieving multi-gear angle adjustment, which comprises an upper cover and a lower cover, a mounting area is arranged between the upper cover and the lower cover, and a pawl, a pawl linkage column and a reset torsion spring are arranged in the mounting area. The automobile seat backrest lock is characterized in that the pawl is provided with a plurality of groups of gear bayonets capable of being linked with a seat latch hook; the gear bayonets are distributed on one side of the pawl and sequentially arranged from the hinged end of the pawl and the pawl linkage column to the other end, and lock holes are formed in the upper cover and the lower cover; the other end, opposite to the end provided with the gear bayonets, of the pawl is in linkage with a transmission plate, and the transmission plate is in linkage with an inhaul cable assembly. The automobile seat backrest lock has the beneficial effects that the automobileseat backrest lock capable of achieving multi-gear angle adjustment is provided, the comfort of an automobile seat is improved, the size is small, the weight is light, the installation space is small, and the concept of automobile light weight is met.

The invention discloses a circuit board locking structure used in a high speed rotation test of a low speed wind tunnel. The circuit board locking structure includes a circuit board, a base plate anda prism. The base plate is fixedly connected with the prism. Sides of the prism are provided with grooves in the direction of the axis. The circuit board is vertically connected with the base plate through an electric connector. One side edge, perpendicular to the base plate, of the circuit board is clamped into one groove of the prism. The side edge on the top end of the circuit board is fixedlyconnected with a locking structure, and one end of the locking structure is fixedly connected to the end face of the prism through screws. The prism, the base plate and the circuit board together forma three-dimensional prism fixing connection structure, and the circuit board and the prism are connected through a U-shaped structure, so that the three-dimensional structure is completely fixed. Inthis way, force acting on the circuit board in a high speed rotation test can be decomposed through the prism and positioning pieces, the direct force on the circuit board is reduced, and the circuitboard is prevented from being damaged.

The invention provides a solar photovoltaic main shaft bearing structure. The solar photovoltaic main shaft bearing structure comprises bearing sleeves, bearing inner rings and rail grooves, wherein each bearing sleeve is composed of two opposite buckled disc-shaped structures; the rear end of each bearing sleeve is vertically connected with an oil storage cylinder; a connecting shaft sleeve is connected between the bearing sleeves; the two ends of the connecting shaft sleeve are each fixedly connected with one bearing inner ring; bearing outer rings are rotationally connected into inner grooves of the bearing sleeves; the bearing inner rings are internally connected into the bearing outer rings; fixing discs are fixedly arranged on the outer parts of the bearing outer rings through bolts;and the outer ends of the fixing discs are fixed on the bearing sleeves. According to the solar photovoltaic main shaft bearing structure, the inner ends of the oil storage cylinders communicates with the interior of buckling grooves of the bearing sleeves, and an oil injection nozzle is arranged in the middle of the outer wall of each oil storage cylinder, so that part of lubricating oil is always stored in the oil storage cylinder to keep long time lubricating conveniently.

The invention discloses a novel fixing structure for steel wire rope sleeves and a clamping strip. The fixing structure comprises the fixing clamping strip. A plurality of positioning parts are symmetrically disposed on the fixing clamping strip. Every two adjacent positioning parts are connected with each other through an assembling strip. A clamping strip sleeve buckle is disposed in the middleof each assembling strip. A sleeve slot is formed in each clamping strip sleeve buckle. The two sides of each steel wire rope are positioned and assembled on the two corresponding positioning parts. The steel wire rope sleeve is disposed in the middle of each steel wire rope. The bottom of each steel wire rope sleeve is disposed in the sleeve slot of the corresponding clamping strip sleeve buckleto be positioned. Each steel wire rope extends out of the two side faces of the corresponding positioning parts. By means of the novel fixing structure, the number of the steel wire rope sleeves usedis reduced by half compared with an original traditional method, so that cost is saved, the fixing firmness effect of the steel wire ropes and the clamping strip is just the same, and the flexibilityof the steel wire ropes is sufficiently utilized to realize the effect of assembling in place; and when the clamping strip is hung, the steel wire ropes share two thirds of fastening stress, and the direct stress between the steel wire rope sleeves and the clamping strip is greatly relieved.

The invention discloses an assembled arc-shaped artificial dam body of a coal mine underground reservoir and a construction method thereof. An artificial dam body is arranged between adjacent coal pillar dam bodies, and the artificial dam body consists of a dam body base and two side wing plates The base of the dam body, the wing plates and the arc-shaped dam body are all assembled from several modules. The base of the dam body has grooves to insert the wing plates and arc-shaped dam body on both sides. The plate also has grooves to embed the arc-shaped dam body, and the base of the dam body and the wing plates are provided with anchor rods, which can form a stable whole between the artificial dam body and the surrounding rock mass. The convex surface of the arc-shaped dam body faces the underground reservoir, and part of the force is decomposed to the coal pillar dam body on both sides to reduce the direct force of the dam body, thereby reducing the thickness of the dam body. The present invention quantifies the size of the artificial dam body, builds standardized dam body modules on the ground, and quickly assembles them underground, which solves the problems of long construction period and high manufacturing cost of underground reservoirs in coal mines, and can prevent the dam body from being unstable, damaged, and water seepage .