43results about How to "Increase frictional contact area" patented technology

The invention discloses a high-effect dry friction damping spring vibration isolator and aims at providing a friction damping vibration isolator which is compact in structure, large in friction damp, high in load and good in environmental adaptation. According to the technical scheme, in a vibration environment, left friction pieces and right friction pieces of a disc-pressing upper cone spring (3) and a disc-pressing lower cone spring (6) perform reciprocating motion to axially extrude a right friction ring piece (4) and a left friction ring piece (9) on two sides, the left friction ring piece, the right friction ring piece, an upper guide umbrella disc (1) and a lower guide umbrella disc (5) are driven to perform constant friction motion on the inner wall of a housing (2), vibration mechanical energy is converted into heat energy so as to achieve vibration energy consumption and reduction. The high-effect dry friction damping spring vibration isolator utilizes low frequency of a conical spring and a damping characteristic of a symmetric semi-ring damping pad, can effectively inhibit spring fluctuation during high-frequency impact, also has composite multiple vibration isolation effect and has large damp under the low-frequency condition compared with a traditional rubber vibration isolator.

The invention provides a self-driven displacement sensor based on a friction nano-generator. The displacement sensor comprises a cylindrical inner column and a cylinder with a cylindrical cavity. Oneend of the inner column is fixedly connected to a component to be measured, the other end of the inner column is inserted into the cavity of the cylinder. The inner column generates axial relative displacement with cylinder along with displacement of a to-be-measured component, and the inner dielectric material layer and the outer dielectric material layer rub each other to generate an electric signal. Compared with other strain measurement devices, the self-driven displacement sensor based on the friction nano-generator has the advantages of simple structure, wide application range, high measurement precision, no need of additional power supply, low cost and the like. Meanwhile, the self-driven displacement sensor has the characteristics of low cost, high precision, wide application range, easy processing, simplicity and convenience in operation and the like.

A pivot mechanism for turning over display screen consists of a fixing component; base; a pair of support frames with bolt-pin; a pair of bushes; being set on bolt - pin; multiple radial ring rib rounding external surface of bush; a movable component including erection part for holding display screen, integrated shaft station having shaft hole formed with multiple slots on surface. The mechanism is prepared with heavy friction force so it can have display screen balanced at any angle.

The invention provides a self-powered wireless vertical mouse. The self-powered wireless vertical mouse comprises a housing, a left key, a right key, a roller middle key, an electromagnetic power supply module, a frictional power supply module, a fixed plate, a rectifier circuit board, a rechargeable battery and a bilateral switch; the housing is designed to be vertical and comprises a left-side housing, a right-side housing, a front-side housing and a base; the frictional power supply module is arranged in the left-side housing, and the left key, the right key and the roller middle key are arranged in the right-side housing; or the frictional power supply module is arranged in the right-side housing, and the left key, the right key and the roller middle key are arranged in the left-side housing; the electromagnetic power supply module comprises a winding coil, a gear bank and a rocking handle; the rocking handle is arranged on the front-side housing; the frictional power supply module is composed of a first friction interface and a second friction interface, wherein the first frictional interface is attached to the housing, while the second friction interface is arched and fixed with the edge of the first friction interface.

The invention relates to parts for rail transit point equipment, specifically relates to a square hole sleeve and a circular hole sleeve for an external locking mechanism of a point machine, relates to a method for manufacturing the square hole sleeve or the circular hole sleeve by utilizing a powder metallurgy method, and solves the problems that the hole sleeve is poor in friction performance and is easily crushed due to the own structure, the abrasive resistance of the existing hole sleeve material is poor, and the hole sleeve prepared according to the existing method is high in defective index, and is poor in shock resistance, corrosion resistance and high low temperature resistance. The employed technical scheme is that the structure of the hole sleeve is improved as a through hole which is adaptive to the outer contour of an actuating rod or an indicating rod; the hole sleeve is manufactured by utilizing the powder metallurgy method; the manufacture process comprises batching, pressing, sintering, vacuum oil immersion, precise shaping and machining; employed raw materials comprise 2-5% of copper powder, 0.5-1% of graphite powder, 0.5-1% of ferro-molybdenum powder, 0.2-0.6% of sulfur powder and the balance of ferrous powder in terms of weight percentage.

The invention provides an organic carbon nanosphere lubricating oil additive and a preparation method and application thereof. The preparation method comprises the following steps that S1, a reactionmonomer is dissolved in a reaction solvent, after full mixing, the mixture is placed at 0-90 DEG C for a reaction of 3-12 hours, and an organic carbon precursor of a polymer is obtained, wherein the reaction monomer is a small molecule compound capable of being polymerized into a super-crosslinked pi-bond conjugated polymer; S2, the organic carbon precursor obtained in the first step and a dopingsource are placed in a tubular furnace for doping carbonization to obtain organic carbon nanospheres containing the doping source, wherein the doping source is one or more of an N source, an S sourceand a P source. By means of the method for the synthesis of the organic carbon source and simple carbonization doping of the N, S and P elements, the dispersion stability of the carbon nanosphere additive in base oil can be significantly improved, and the wear resistance under high load is improved through N, S and P doping.

The invention provides a double-hoisting-point fixed winch. The double-hoisting-point fixed winch comprises a rack, a driving mechanism and winding mechanisms; the driving mechanism, the winding mechanisms, braking mechanisms and a mounting mechanism are installed on the rack separately; and the driving mechanism is in transmission connection with the winding mechanisms and used for driving the winding mechanisms so that the winding mechanisms can rotate around their central axes for winding and / or releasing traction ropes. The double-hoisting-point fixed winch further comprises the braking mechanisms and the mounting mechanism; and each braking mechanism comprises a first brake disc and a second brake disc, wherein the side, close to the second brake disc, of the first brake disc is provided with a convex block, and one side of the second brake disc is fixedly connected with one end of the corresponding winding mechanism. According to the double-hoisting-point fixed winch, the first brake disc is provided with the convex block, the second brake disc is provided with an annular groove, when the surfaces of the first brake disc and the second brake disc are attached, the convex block and the annular groove are also attached, the friction contact area of the first brake disc and the second brake disc is increased, and the braking effect is improved.

The invention discloses a multi-sub-motor coupling planet traction drive bearing type speed reduction driving system which comprises a left planet traction drive bearing type speed reducer, a right planet traction drive bearing type speed reducer, a number one motor, a number two motor, a number three motor, a number four motor and a number five motor; random order combination of a sun wheel, a planet carrier and an outer ring in the speed reducer is corresponding to a power input end, a power output end and a middle transmission part in the speed reducer respectively, the number three motor is used for providing power, the number one motor and the number four motor are used for speed coupling, and the number two motor and the number five motor are used for torque coupling; according to the multi-sub-motor coupling planet traction drive bearing type speed reduction driving system, through the cooperative working of the four motors, the speed can be coupled so that the wheel high rotation speed or differential speed requirement of two-wheel-drive during turning during vehicle high speed driving can be met, a differential speed device structure is not required to be equipped, the driving system structure is simplified, the structure is compact, and the cost of the driving system is reduced.

The invention discloses a buffering decelerating device of an overturning mechanism of a spacecraft. The overturning mechanism of the spacecraft comprises a machine frame housing and a rotor arm, wherein the machine frame housing adopts a semicircle structure; the rotor arm is rotatably connected to the machine frame housing; the buffering decelerating device comprises a decelerating adjusting block and one or more decelerating baffle plates; the decelerating baffle plates are mounted on the machine frame housing; the decelerating adjusting block can be movably mounted on the rotor arm in a radial direction; and the decelerating adjusting block can extend the rotor arm under the effect of the centrifugal force to be in matching contact with the decelerating baffle plates. Through the adoption of the buffering decelerating device of the overturning mechanism of the spacecraft disclosed by the invention, not only working conditions of which the rotating speed of the overturning mechanism of the spacecraft is greatly changed can be adapted, but also the targeting accuracy of the overturning mechanism of the spacecraft is not influenced.

The invention discloses a micro-array multi-energy harvesting generator driven by wind-wind synergy, which is composed of a plurality of wind-wind synergy-driven miniature multi-energy harvesting generators arranged in an orderly manner; Friction elastic generator array, photovoltaic and piezoelectric co-driven fluorescent waveguide composite frame generator, photovoltaic cell composite wind blade generator array, intelligent controller, sensor, battery and circuit, inverter, generator shaft core, shaft core Rotating layer, multiple energy harvesting generator frame, inner rotating frame, outer rotating elastic frame, elastic support rod; photovoltaic cell composite wind blade generator array is composed of multiple photovoltaic cell composite wind blade generators distributed in the form of circular fan blades The fan-shaped array capable of rotation; the photovoltaic cell composite wind blade generator includes photovoltaic cells A and wind blades; the photovoltaic cell A is compounded on the surface of the wind blade facing the sun to form a composite structure.

The invention discloses a preparation method of graphene micro-wrinkle friction nano-generators, The preparation method comprises a preparation process of a shape memory polymer / graphene (rGO) micro-wrinkle positive electrode friction material for the friction nano-generators (TENGs). The preparation method is mainly characterized in that rGO micro-wrinkles with different morphologies prepared on a shape memory polymer substrate are used as the positive electrode friction material, polyvinylidene fluoride (PVDF) is used as a negative electrode friction material, the rGO micro-wrinkles with different morphologies are obtained by controlling different recovery ratios of polymers, and compared with rGO with a common plane structure, the micro-wrinkle structure increases the friction contact area, and benefits the increase of the number of transferred electrons, so that the output performance of the TENGs is greatly improved; meanwhile, the TENGs are well attached to the substrate film through the unique micro-fold structure and are not prone to damage, and the service life of the TENGs is prolonged.

The invention provides a triplex redundancy whole electric braking actuation system, and relates to the technical field of aircraft parking. The triplex redundancy whole electric braking actuation system comprises three actuators, an actuating bracket, a brake disc assembly and an airplane wheel; the airplane wheel is of a cylindrical structure vertically arranged; the brake disc assembly is fixedly mounted at the axial top end of the airplane wheel; the actuating bracket is of a disc structure; the actuating bracket is horizontally and coaxially placed on the upper surface of the brake disc assembly; the three actuators are fixedly mounted on the upper surface of the actuating bracket; the three actuators are uniformly and annularly distributed taking the axis of the actuating bracket asthe center of a circle; the distance from the center of the actuators to the axis of the actuating bracket is 83-87mm; and the two adjacent actuators take the axis of the actuating bracket as the center of the circle, and an angle of the two adjacent actuators is 120 degrees. According to the triplex redundancy whole electric braking actuation system, high-reliability braking schemes with small volume and light weight are provided for a whole electric airplane / a heavy truck and the like.

The invention provides a brake and a motor. The brake comprises a stator iron core (1), an armature (2), a friction plate (3) and a limiting plate (4) which are sequentially arranged in the axial direction, the limiting plate (4) and the stator iron core (1) are fixedly connected, a guide column (5) is arranged between the limiting plate (4) and the stator iron core (1), the armature (2) can be limited by the guide column (5) and slides along the guide column (5), the armature (2) is of a block-type structure, and relative displacement in the axial direction can be generated between the adjacent blocks. According to the brake, the friction contact area can be increased, and the static torque of the brake is prevented from being reduced.

The invention provides a stepless speed change device and a gearbox. The speed change device comprises a driving cone disc, at least one first transmission cone pulley which is in contact transmission with the driving cone disc, a driven cone disc, at least one second transmission cone pulley which is in contact transmission with the driven cone disc and a transmission mechanism. The first transmission cone pulley can move between the maximum circumference and the minimum circumference of the driving cone disc, the second transmission cone pulley can move between the maximum circumference and the minimum circumference of the driven cone disc, and the first transmission cone pulley is connected with the second transmission cone pulley through the transmission mechanism. The device has the advantages of large transmission torque, high reliability and low cost.

The invention relates to the technical field of hoisting equipment, in particular to a separation and reunion type winding drum and a winch. The separation and reunion type winding drum comprises a drum body and a winding drum shaft coaxially arranged with the drum body, wherein a separation and reunion device comprising mounting assemblies and separation and reunion assemblies is arranged on thewinding drum shaft and is used for controlling communication and separation of the drum body and the winding drum shaft. According to the separation and reunion type winding drum, the plurality of mounting parts and the separation and reunion assemblies are arranged between the winding drum shaft and the drum body, so that a plurality of contact frictional parts are arranged between the winding drum shaft and the drum body to increase the frictional contact area and avoid the slip phenomenon. On the condition that the separation and reunion assemblies fit the drum body, it is ensured that thewinding drum shaft can drive the drum body to rotate stably and reliably. The separation and reunion assemblies can be partially or completely used to ensure the contact frictional force of the separation and reunion assemblies and the drum body, so that the winding drum shaft drives the drum body to rotate stably and reliably, and lifting and falling of a heavier object are achieved. The winch comprises the separation and reunion type winding drum.

The invention discloses a continuous trepanning type steel folded plate connecting device and a manufacturing method. The continuous trepanning type steel folded plate connecting device comprises a base, at least two first folded plates and two second folded plates, the first folded plates and the second folded plates are fixed to the base, and all the first folded plates are located between the two second folded plates; the two adjacent first folded plates are connected through corresponding first steel bars, and the second folded plates and the adjacent first folded plates are connected through corresponding first steel bars. The first folded plate comprises a first flat plate, a second flat plate and a third flat plate, the first flat plate and the third flat plate are arranged in parallel, the two ends of the second flat plate are connected with the first flat plate and the third flat plate respectively, and the second flat plate is connected with the base. The space staggering degree of the connecting device is higher, after concrete is poured, the first folded plates are embedded into the concrete, compressed concrete blocks are formed between the adjacent first folded plates, the action area of the first folded plates in the longitudinal shear force direction is large, the compressed concrete blocks with the larger size are formed, and the longitudinal shear bearing capacity of the connecting device is improved.

The invention relates to the technical field of kits, and provides a kit for stabilizing a reagent tube to prevent breakage by using pressure. The kit comprises a kit body, the inner wall of the kit body is movably connected with an extrusion plate, the outer wall of the extrusion plate is elastically connected with a spiral spring, and the outer wall of the extrusion plate is fixedly connected with moving plates. According to the kit capable of stabilizing the reagent tube to prevent the breakage by using the pressure, a user covers the kit with a kit cover, the kit cover moves downwards to enable the extrusion plate to be away from the kit body, the extrusion plate drives all moving plates to move, and when the kit cover completely covers the kit, grooves in the exteriors of the moving plates are just connected with protruding blocks, the protruding blocks drive push rods, the push rods, transverse plates and air cushions are matched to enable a stabilizing clamp to be close to the reagent tube, a protection plate synchronously moves while the stabilizing clamp moves, the maximum moving distance of the protection plate is equal to that of the stabilizing clamp, the situation that the stabilizing clamp excessively moves to damage the reagent tube is prevented, and the protruding blocks effectively clamp the moving plates to prevent the situation that the stabilizing clamp easily moves to release clamping on the reagent tube.

An automatic paging machine comprises a vertically-arranged guide shaft (600), a supporting table (100) directly or indirectly installed on the guide shaft (600) slidably and a paper rubbing module (200) arranged on the supporting table (100) in a supporting manner; the paper rubbing module (200) comprises two first supporting pieces (210), a plurality of rubber rolling shafts (220) arranged in parallel and a rolling supporting shaft (270); the rolling supporting shaft (270) is rotatably mounted on the two first supporting pieces (210) respectively; the automatic paging machine further comprises an air cylinder (610) used for driving the supporting table (100) to ascend and descend on the guide shaft (600) so that the rolling supporting shaft (270) can be supported on a paper stack formed by stacking paper (300); and the automatic paging machine further comprises an adjusting module (240) which is connected with the paper rubbing module (200) and used for applying upward acting force to the paper rubbing module (200) so as to adjust sliding friction force between the rubber rolling shafts (220) and the paper (300). The automatic paging machine is novel in design and high in practicability.

The invention relates to a balance trunnion type connection rod valve spool which comprises a cylindrical valve rod and a spherical valve spool, wherein the cylindrical valve rod and the spherical valve spool are integrally connected, a cylindrical upper trunnion is arranged between the valve rod and the valve spool, and the diameter of the upper trunnion is larger than that of the valve rod and smaller than that of the cross section of the valve spool. A lower trunnion symmetrical to the upper trunnion is arranged at the bottom of the valve spool, and axes of the valve rod, the upper trunnion and the lower trunnion are located on the same straight line. The upper and lower balance trunnion type design is adopted so that the valve spool is evenly stressed vertically, the stuffing sealing deformation problem caused by valve spool position offset is well solved, valve spool leakage probability is reduced, valve service life is prolonged, and valve safety and reliability are improved. The friction contact area of the upper trunnion and a stuffing sealing port is enlarged on the premise of not enlarging the valve rod diameter, thermal cyclicity is improved, and the thermal effect is reduced to the lowest.

The invention relates to an anti-loosening bolt assembly and its anti-loosening bolt and anti-loosening nut. The anti-loosening bolt assembly includes a bolt with an external thread and a nut with an internal thread. The thread grooves with slopes on both sides are spirally fitted, the major diameter of the external thread of the bolt is the same as the major diameter of the internal thread of the nut, the minor diameter of the external thread of the bolt is larger than the minor diameter of the internal thread of the nut, and the hardness of the bolt is greater than that of the nut The hardness of the thread teeth of the internal thread is deformed by the top pressure of the bottom of the thread groove of the external thread during the process of screwing the nut onto the bolt to fill the thread groove of the external thread, and the two sides of the thread teeth of the internal thread The slopes respectively correspond to pressing contact with the slopes on both sides of the thread groove of the bolt. The slopes on both sides of the thread teeth are in pressure contact with the slopes on both sides of the thread groove, which effectively strengthens the friction between the bolt and the nut, and effectively improves the anti-loosening effect of the anti-loosening bolt assembly.