32results about How to "Reduce vibration friction" patented technology

The invention discloses a vibrating membrane and a loudspeaker, wherein the vibrating membrane includes a middle part and a protruding ring part surrounding the outer periphery of the middle part, and the ring part includes a first straight side part and a second straight side portion, and an arc-shaped corner portion connecting the first straight-edge portion and the second straight-edge portion, the arc-shaped corner portion and the ends of the first straight-edge portion and the second straight-edge portion connected thereto form a corner area; There is a pattern on the corner area, and the pattern extends in an undulating wave shape along the surrounding direction of the ring portion where it is located. The pattern has a plurality of crest lines and trough lines, and the pattern along the The surrounding section of the ring portion at its position is arranged as a continuously bent smooth curve, and the smooth curve has a plurality of crests and troughs. The technical solution of the invention can reduce the stress concentration phenomenon of the ring part of the vibrating membrane, and improve the performance reliability and acoustic performance of the loudspeaker.

The invention discloses a high-stability overrun clutch of an electric bicycle. The high-stability overrun clutch of the electric bicycle comprises an inner ring, an outer ring and a retaining frame arranged between the inner ring and the outer ring. A plurality of operation grooves are formed in the retaining frame in the circumferential direction. Special-shaped rollers are arranged in the operation grooves. The high-stability overrun clutch of the electric bicycle is characterized in that a plurality of pin roller assembly holes are also formed in the retaining frame in the circumferential direction, pin rollers are embedded in the pin roller assembly holes, and circular arc rolling planes on each pin roller abut against the outer surface of the inner ring and the inner surface of the outer ring correspondingly through opening protrusions arranged on the two side walls of the corresponding pin roller assembly hole. Due to the fact that the pin rollers are arranged on the retaining frame between the inner ring and the outer ring, it is ensured that the inner ring and the outer ring make contact rolling through the pin rollers in the disengagement process of the inner ring and the outer ring, the prior face contact is changed into point contact, the contact area is reduced, friction is reduced, vibration and noise are reduced, and the inner ring and the outer ring are made to rotate more smoothly; and accordingly, it is ensured that a clutch and a whole transmission system of the electric bicycle operate more stably and reliably.

The invention discloses a novel high-efficiency hardware tool hammer for shock absorption, and relates to the technical field of hardware. The shock-absorbing new high-efficiency hardware tool hammer includes a hammer shaft. An end sleeve is sleeved on the right side of the hammer shaft. An anti-vibration ring is sleeved on the middle part of the hammer shaft. Connectors are uniformly arranged on the inner side of the anti-vibration ring. The inner side of the connecting body is uniformly provided with a hemispherical groove, and the inner side of the connecting body is uniformly provided with a first anti-vibration mechanism through the hemispherical groove. Attached with hammer head. This shock-absorbing new high-efficiency hardware tool hammer is equipped with a first anti-vibration mechanism. When receiving the vibration transmitted by the hammer shaft, multiple first anti-vibration mechanisms reduce the vibration frequency by moving sideways and lowering the contact surface, so as to suppress the vibration. Conduction reduces the vibration amplitude and frequency of the hand, thereby reducing the vibration friction of the hand and protecting the hand.

The invention discloses a compact-type rising-stem gate valve which comprises a hand wheel, a screw rod, a valve-stem nut and a support. The cross section of a screw cap of the valve-stem nut is polygonal and the longitudinal section of the same is wedged, a sunken platform matched with the screw cap of the valve-stem nut in shape is arranged at the position where the hand wheel is matched with the valve-stem nut, a triangular boss protruding outwards is arranged at the bottom edge of the valve-stem nut, and a triangular groove matched with the triangular boss in shape is arranged at the position where the support is matched with the valve-stem nut. The compact-type rising-stem gate valve has the advantages that torque the hand wheel passes to the valve-stem nut is increased since the screw nut of the valve-stem nut is polygonal, and the triangular boss structure arranged at the bottom edge and protruding outwards get rid of connecting pieces of check head screws, fine threads and the like, therefore the compact-type rising-stem gate valve is low in cost, simple in structure, easy to assemble, reliable in work and long in service life; friction vibration between the hand wheel and the support can be alleviated through a gasket, and abrasion between the hand wheel and the support is avoided; made of aluminum bronze, the valve-stem nut is high in strength and good in abrasion performance and corrosion resistance.

The invention discloses a graphite / aluminum-based self-lubricating sliding bearing containing graphene and a preparation method thereof. A self-lubricating sliding bearing consists of an outer circle of aluminum alloy layer and an inner circle of graphite / aluminum-based self-lubricating composite material layer, wherein the inner circle of graphite / aluminum-based self-lubricating composite material layer is formed by an annular honeycomb structure graphite framework and an aluminum alloy filled with honeycomb structure holes. The graphite in the inner circle is prepared by a mixture being formed by natural crystalline graphite powder, phenolic resin powder and graphene powder, and the annular honeycomb structure graphite framework is prepared by adopting a selective laser sintering method. The phenolic resin accounts for 20 to 50 percent by mass of the graphite powder, the content of the graphene is 1 to 3 percent by mass of the overall mixture, and the thickness of the annular honeycomb structure graphite framework is 2 to 5mm. The self-lubricating sliding bearing has excellent self-lubricating performance under a dry friction condition of a poor working condition environment.

The invention relates to the technical field of gear structures, in particular to a special high-leakproofness connecting gear. According to the adopted technical scheme, the special high-leakproofness connecting gear comprises a cylindrical gear structure main body connecting column, clamping assembling connecting grooves which are uniformly distributed on the circumference are formed in the outer cylindrical surface of the gear structure main body connecting column, the clamping assembling connecting grooves completely penetrate through the upper end surface and the lower end surface of thegear structure main body connecting column, a cylindrical sealing assembling connecting groove is formed in the center of each of the upper end surface and the lower end surface of the gear structuremain body connecting column, and the center of the bottom surface of each sealing assembling connecting groove is provided with an integrally-formed cylindrical fastening assembling connecting boss. The special high-leakproofness connecting gear has the advantages that the connection tightness of the gear structure in the assembling process is guaranteed, moreover, the vibration friction in the using process can be reduced when the gear structure is used, the stability of the part in the using process is effectively improved, and the service life of the gear structure in the using process is longer.

The invention discloses energy-saving and environment-friendly lubricating oil capable of self-repairing wear for an internal combustion engine and a preparation method of the energy-saving and environment-friendly lubricating oil, and belongs to the field of lubricating materials. The energy-saving and environment-friendly lubricating oil is prepared from the following components in percentage by weight: 87 to 90 percent of base oil and 10 to 13 percent of additive, wherein the additive is prepared from the following components in percentage by weight: 1.2 to 2.5 percent of a calcium-containing clearing agent, 1.3 to 2 percent of a dispersing agent, 0.5 to 1.4 percent of an anti-wear agent, 1.5 to 2.5 percent of an antioxidant, 0.5 to 0.8 percent of a corrosion inhibitor, 1.5 to 2 percent of a viscosity index improver and 1.1 to 3.5 percent of a friction improver; the friction improver is polytetrafluoroethylen high-molecular compound ultramicro nano-powder and the particle size of the powder is 2 to 12 nm. According to the energy-saving and environment-friendly lubricating oil disclosed by the invention, the problem that existing lubricating oil for the internal combustion engine cannot repair friction and wear of internal parts in the engine is solved; in addition, the design tolerance gap can be automatically compensated and non-disassembly in-situ repair can be carried out, thereby improving the sealing property of a cylinder, a piston and other parts; in addition, a compression ratio and an air-fuel ratio of the engine are improved, fuel oil is combusted more sufficiently, the discharge of exhaust pollutants is reduced and the frictional resistance is reduced.

The invention relates to the technical field of vibration structures, and particularly discloses a multifunctional low-noise vibration structure which comprises a fixed frame, a movable frame and a first driving piece, and the first driving piece drives the movable frame to move back and forth relative to the fixed frame; a second driving piece drives a lifting frame to move relative to the movable frame; a rolling guide rail unit comprises a fixed seat, a movable seat and a roller part arranged between the fixed seat and the movable seat in a rolling manner, the fixed seat is arranged on a fixed frame, and the movable frame is arranged on the movable seat; the fixed seat is provided with a first groove body, the movable seat is provided with a second groove body, and the two ends of the roller part are contained in the two groove bodies respectively. A user can place the head or the legs on the lifting frame after the second driving piece moves; by means of the structural arrangement of the roller part of the rolling guide rail unit, the friction force between the fixed frame and the movable frame is reduced, abrasion between the fixed frame and the movable frame is delayed, vibration friction of the vibration structure is reduced, service life is prolonged, and operation stability of the vibration structure is improved.

The invention discloses a non-contact type brush-type seal and a manufacturing method of the non-contact type brush-type seal. The non-contact type brush-type seal comprises a gland sealing ring, a front baffle and a rear baffle, wherein the front baffle and the rear baffle are arranged on the gland sealing ring. The front baffle, brush brittles and the rear baffle are welded into a whole. The front baffle is located on the air inlet side and is in riveting joint with an installation groove in the gland sealing ring so as to be assembled with the gland sealing ring. The non-contact type brush-type seal further comprises a U-shaped riveting groove. The U-shaped riveting groove is located on the air inlet side. A certain dip angle is formed by the brush brittles in the rotating direction of a rotor. The non-contact type brush-type seal has the remarkable advantages that the seal can be adapted to the transient bounce of the rotor, gaps are kept unchanged, the sealing effect of the seal is kept for a long time, the brush bristles are resistant to high temperature and long in service life and are arranged in the rotation direction of the rotor at a certain angle, friction vibration can be reduced, and influence on the safety of a unit is small. According to the manufacturing method of the non-contact type brush-type seal, it is guaranteed that the seal is not broken in the operation process, the high-performance welding technology is adopted to guarantee that the brush bristles do not fall off, the optimized brush bristle bunch thickness and height guarantee the high sealing performance, and the sealing effect is guaranteed.