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.

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 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 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 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.

A hinge module includes a plurality of discs, a plurality of friction plates and a restraining member. The discs are eccentrically connected to each other. Each of the friction plates has a circular hole, each of the friction plates is rotatably disposed on one of the discs through the circular hole, and the friction plates contact each other. The restraining member is disposed on the friction plates.