125results about How to "Avoid contact friction" patented technology

The invention provides a free-film type anti-inclination air spring, which belongs to the technical field of air springs. A transverse stopping gap and a vertical stopping gap exist in the air spring, so that the vibration impact during operation can not be well reduced. In the invention, a lengthened cylindrical pin is adopted, a friction block is arranged, and meanwhile, the concave design for a stopping seat is carried out, and the upper wall of the stopping seat is heightened, so that the design not only can be used for providing a reasonable free gap for the air spring, but also can be used for effectively preventing the phenomenon that the cylindrical pin jumps out of the stopping seat from occurring; and in addition, the air spring is provided with an anti-leveling anti-inclination rubber block, so that the phenomenon that the air spring is inclined can be effectively prevented, and a horizontal elastic gap is realized by the rubber block together with a transverse limiting device. The free-film type anti-inclination air spring is mainly used for a damping system of a magnetic-suspension vehicle.

A pushbutton mechanism for keyboards includes a bridge in a pushbutton that has an inner frame and an outer frame to make the pushbutton movable up and down. The inner frame and outer frame are intersected and coupled together, and have respectively inner side brackets and outer side brackets that have a stub shaft and a pivot portion to form a relative turning relationship. The inner and outer side brackets have respectively harness bosses and harness recesses corresponding to each other to allow the pushbutton to form a lifting position and a lower position in normal conditions. The bridge thus formed can generate a steadier relative turning and confine the stroke distance for the pushbutton.

The invention discloses a circumferential sectioned helium sealing device for an oxygen turbine pump of a hydrogen oxygen engine. According to the circumferential sectioned helium sealing device, a circumferential sectioned sealing ring I and a circumferential sectioned sealing ring II are placed in a cavity formed by a cover plate and a sealing shell; sealing shaft sleeves are placed in rings of the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II; the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II are oppositely placed and pre-tensioned by virtue of pre-tensioning springs; and each of the circumferential sectioned sealing ring I and the circumferential sectioned sealing ring II is formed by connecting a plurality of fan-shaped arc sections with the same structure end to end, and constrained on an excircle surface through garter springs. According to the circumferential sectioned helium sealing device, each sealing ring is composed of the plurality of fan-shaped arc sections, a hydrodynamic groove structure is introduced, and a hydrodynamic effect of a sealing clearance fluid is adequately utilized, thus the helium sealing device reliably works under an extremely small clearance, and a low leakage amount is maintained.

The invention provides a pump body assembly and a compressor provided with the same. The pump body assembly comprises two structural parts, a bearing-type cylinder which is arranged between the two structural parts and comprises an outer ring and an inner ring which can rotate relative to the outer ring and at least one anti-attrition structure, wherein the anti-attrition structure is arranged between at least one structural part and the bearing-type cylinder to prevent the contact friction between the inner ring and the structural parts. By means of the pump body assembly provided by the invention, the problems that in the prior art, an inner ring of a pump body assembly is easy to wear and the reliability of the pump body assembly is reduced are effectively solved.

A medium feeding device includes a first feeding unit feeds the medium to be fed to a downstream side of a feeding direction. A second feeding unit then feeds the medium to a upstream side and a downstream side on the basis of a feeding direction of the first feeding unit. A friction member is positioned opposite to the first feeding unit. A displacement member converts between a first state in which the displacement member protrudes upwardly in a stacked direction with respect to the friction member and a second state in which the displacement member retracts downwardly. The displacement member is set as the second state when one remaining sheet of the medium is fed to the downstream side by the first feeding unit, and the displacement member is set as the first state when a trailing end of the one remaining sheet passes through the friction member.

The invention provides a magnetorheological fluid load simulator and a design method of a structure parameter of the load simulator. The load simulator simulates three basic loads: constant power, constant torque and a ventilator load, and comprises a cylinder barrel, a damping drum, a shaft, an excitation coil and a magnetorheological fluid. A curved flux path is formed by combining a magnetic conducting ring and a magnetic isolation ring, so that damping moment is increased without increasing the size of the load simulator; a self-sealing technology of the magnetorheological fluid solves the technical problems that zero magnetic field damping moment of the load simulator is increased due to sealing of the magnetorheological fluid with an O-shaped sealing ring and the sealability is reduced due to excessive wear of the sealing ring caused by long-time operation in the prior art; and the load simulator is simple in structure and good in sealability.

The invention discloses a novel anti-locking brake device for an automobile. The novel anti-locking brake device for the automobile comprises a braking rotary disc, two main cavity bodies and a T-shaped auxiliary cavity body, the upper ends and the lower ends of the interiors of the main cavity bodies are separately and slidably connected with second pistons and first pistons, the first pistons are connected with the middles of the rear sides of braking discs through first sliding rods, and the second pistons are connected with a cross rod through second sliding rods. The two main cavity bodies are connected through the auxiliary cavity body in a penetrating mode, the second pistons in the main cavity bodies move to drive the first pistons to move for braking, meanwhile, a third piston moves in the auxiliary cavity body under the driving of a motor, braking anti-locking is realized, in addition, the braking rotary disc on the braking discs is fixed through a positioning rod, disassembly and replacement are facilitated, and the braking maintenance efficiency is improved.

A mobile terminal and a housing assembly thereof are provided. The housing assembly includes a middle frame and a battery cover. One side of the middle frame is provided with a battery accommodation groove, and the battery cover is arranged on the side of the middle frame with the battery accommodation groove; the battery cover comprises a cover pressing part and a buckling part, wherein the buckling part is integrally arranged along the edge of the cover pressing part, the cover pressing part is arranged in the battery receiving groove, and the buckling part is engaged with the side edge of the middle frame; a support rib is arranged at the opposite side edge positions of the battery accommodation groove, and the support rib holds the cover pressure part of the battery cover so as to forma deformation accommodation gap between the cover pressure part and the middle frame. The housing assembly enables the mobile terminal to achieve wire support in the thickness direction, a deformation accommodation gap is formed between the battery cover and the middle frame. When the battery cover is deformed due to external force, the deformation accommodation gap can be used to accommodate thedeformation amount of the battery cover, thereby avoiding large-area contact friction between the battery cover and the middle frame, and effectively eliminating abnormal noise of the battery cover due to external force.

The invention relates to a two-plate type injection molding machine direct and fast mold locking mechanism oil way system for spring molds. The two-plate type injection molding machine direct and fastmold locking mechanism oil way system comprises a direct and fast mold locking oil cylinder, a first cartridge valve, a high-pressure auxiliary valve and a variable displacement piston pump set. An oil inlet of the direct and fast mold locking oil cylinder is connected with a port A of the first carriage valve and a port A of a second cartridge valve through pipelines. An oil discharge port of the direct and fast mold locking oil cylinder is connected with a port A of a fifth cartridge valve and an outlet of the variable displacement piston pump set through pipelines correspondingly. An inletof the variable displacement piston pump set communicates with an oil tank. A port B of the fifth cartridge valve is connected with a port A of a third cartridge valve and a port A of a fourth cartridge valve through pipelines. A port B of the second cartridge valve and a port B of the third cartridge valve are connected with an outlet of a servo power motor set through centralized pipelines. Theservo power motor set is composed of a first motor, a second motor and a third motor. The two-plate type injection molding machine direct and fast mold locking mechanism oil way system has the characteristics that the machine performance and quality are improved and the service life of machines and the molds is prolonged.

The invention discloses an intermediate track and auxiliary device transportation system, which belongs to the technical field of wheeltrack railways and can effectively solve the problems of transverse force, vertical force, starting friction force, braking operation resistance and climbing friction force in the transportation process of a train. In the technical scheme, an intermediate track is established on a median line between a left steel rail and a right steel rail of the conventional wheeltrack railway; a controller device is arranged on the middle lower side of a train bogie wheel shaft or a cross beam; the lower end of the controller device is vertically connected with a hanger device, and the upper end of the controller device is provided with a damping device; a lifting frame wheel shaft which is arranged on the middle upper side of the intermediate track and is extended from a bogie pulling motor rotating shaft gear and a bogie wheel shaft gear is provided with a starting wheel, a braking wheel 1 and a braking wheel 2; and a brake caliper device is arranged in front of the starting wheel or the braking wheel 2 or behind the braking wheel 1. The technical scheme has extremely prominent effects of improving the safety, the speed and the benefit of the train during operation, preventing the wheel/track from abrasion, and the like.

The invention discloses a magnetic fluid sealing rotary joint. The magnetic fluid sealing rotary joint comprises a shaft, a floating ring, pole shoes, a permanent magnet, a shell, a front bearing, a rear bearing and an end cover; one end of each throttling hole is in communication with a gap between the floating ring and the shaft, and the other end of each throttling hole is in communication witha second air channel; the floating ring and the pole shoes form a clearance fit with the shaft; and the gaps between the shaft and the pole shoes are filled with magnetic fluids, and the permanent magnet acts on the magnetic fluids through the pole shoes. According to the magnetic fluid sealing rotary joint, two-stage seal is adopted, the first seal adopts a non-contact floating ring seal, the second seal adopts a magnetic fluid seal, zero leakage seal to the fluid medium can be realized, and contact friction between solids is completely avoided; due to the fact that no solid-phase contact friction exists between the sealing element and the rotating part, the adhesive wear is avoided, and the rotary joint has a quite long service life; and due to the fact that the friction torque betweenthe rotating part and a static part is small, the power consumption of the rotary joint is quite low.

The invention discloses a 360-degree freely rotary-type wing chun wooden dummy. The wing chun wooden dummy comprises an upper dummy body and a lower dummy body, wherein the upper dummy body is provided with several dummy hands, and the lower dummy body is provided with dummy feet; the upper part of the lower dummy body is connected to the lower part of the upper dummy body through a connecting component, and the upper dummy body rotates around a central shaft of the connecting component. According to the 360-degree freely rotary-type wing chun wooden dummy, the upper dummy body and the lower dummy body are connected together in a rotating mode through the connecting component so that the upper dummy body can 360-degree rotate around the central shaft in the beating process, the actual combat capacity is improved, and the training effect is strengthened; in addition, the dummy hands are installed in through holes of the upper dummy body through an installing part, the two ends of the dummy hands are symmetrically arranged so that the two ends can be used, the number of independent dummy hands is reduced, and the installation is simplified; in addition, the 360-defree freely rotary-type wing chun wooden dummy is convenient to disassemble and assemble and is convenient to carry.

The invention discloses an automatic steering device realizing steering through change of the gravity center. The device comprises a bracket and a buffering positioning device. The automatic steering device is characterized in that the lower end of the bracket is connected with a vehicle shaft; wheels are arranged at two ends of the vehicle shaft; a bearing seat is arranged at the upper end of the bracket; the bracket is connected with a top plate through a bearing; the top plate is connected with a chassis bottom shell; the bracket is provided with the buffering positioning device; the buffering positioning device is arranged on the side tangent plane of the bearing seat; the bracket is in an inclined-rod shape; and the wheels are conical. According to the automatic steering device, a user controls the automatic steering of a vehicle through the change of the gravity center; the device is flexible, convenient and fast, easy to operate and very high in interestingness, saves cost, has a simple structure and wide application range, and is suitable for the walk-replacing vehicles such as light electric vehicles, electric bicycles, electric scooters, motor scooters, steam scooters and skateboards.

The invention discloses a mold for breaking off hardware waste. The mold for breaking off the hardware waste comprises a lower mold body, a guide block, a first sliding rail, a second sliding rail, a first sliding block, a first power device, a second sliding block and a second power device, wherein the guide block is located in the lower mold body; the first sliding block is located in the first sliding rail and used for pushing the hardware waste to bend in a first direction; the first power device is connected with the first sliding block and used for pushing the first sliding block to slide along the first sliding rail; the second sliding block is located in the second sliding rail and used for pushing the hardware waste to bend in a second direction, and the second direction is opposite to the first direction; and the second power device is connected with the second sliding block and used for pushing the second sliding block to slide along the second sliding rail. The mold for breaking off the hardware waste is reasonable in structural design and can automatically break off the hardware waste, the process that the hardware waste needs to be removed by manually operating a jig after a product is formed is avoided, the production efficiency is greatly improved, and the production cost is reduced.

The invention relates to the technical field of auxiliary equipment for stainless steel processing, and discloses a fastening device for polishing stainless steel tubes. The fastening device for polishing the stainless steel tubes includes a polishing machine base; a column is fixedly installed at the top of the polishing machine base, a hydraulic lifting device is fixedly installed at the top ofthe column, and a hydraulic fixing device is connected to an outer movable rod of the column in a sleeving mode, the hydraulic fixing device is internally and movably connected with four polishing devices, and one of the polishing devices is fixedly installed on the middle part of the bottom end of the hydraulic lifting device. The fastening device for polishing the stainless steel tubes can clampthe stainless steel tubes which need to be polished vertically on all sides through the combined action of the hydraulic lifting device, the column, the hydraulic fixing device and polishing devicesso as to avoid the movement or shaking of the stainless steel tubes during the polishing grinding process, the stability of the stainless steel tubes in processing is improved, and the work efficiencyof processing the stainless steel tubes is further improved.

The invention discloses a wear-resistant rope supporting device special for power transmission. The device comprises a base and a power transmission rod tower fixedly connected to the upper end of thebase, a device cavity is formed in the side wall of the base, a cavity is formed in the side wall of the power transmission rod tower, a transverse plate is slidably connected to the opposite inner wall of the device cavity, the upper end of the transverse plate is fixedly connected with a forward and reverse rotating motor, the lower end of the transverse plate is fixedly connected to the innerbottom of the device cavity through an electric push rod, and a main gear is coaxially and fixedly connected to an output shaft of the forward and reverse rotating motor. By arranging a rope winding mechanism, a fixing mechanism, a clutch mechanism, a locking mechanism and multiple driving mechanisms, ropes can be routed from the two fixed pulleys without contact friction with the power transmission rod tower or the base, abrasion of the ropes is effectively prevented, automatic lifting of the ropes and automatic hoisting of heavy objects can be realized, manual operation is not needed, the labor cost is reduced, and danger is avoided.

The invention provides a mower suitable for trimming objects to be trimmed on a lawn. The mower includes a mower body; and a supporting structure arranged in the mower body; the supporting structure can stretch out of and retract to the mower body with respect to the mower body; and the supporting structure can stretch out of the bottom of the mower body with respect to the mower body so as to support and separate the mower body or a part of the mower body from the lawn. The supporting structure of the mower stretches out of the bottom of the mower body, and then can support and separate the mower body from the lawn so as to allow a certain distance between the bottom of the mower body and the lawn; and in this way, contact friction between the bottom of the mower body and the lawn can beavoided, and abrasion of the bottom of the mower body can be prevented.

The invention provides a mini-type bistable-state self-locking valve which is low in power consumption, long in service life and reliable in sealing. The mini-type bistable-state self-locking valve comprises a valve body, a closing coil, an opening coil, a permanent magnet, a valve element, stop iron, a wire and a shell; the stop iron and the valve element are sequentially arranged in an inner cavity of the upper portion of the valve body; the opening coil, the permanent magnet and the closing coil are sequentially arranged in steps outside the valve body in the axial direction; the valve body comprises a valve seat, a lower magnetism isolating ring, a magnetism conductive ring, an upper magnetism isolating ring and a tip which are sequentially welded into a whole through vacuum electron beams; the valve element comprises a rubber block, anti-friction rings and a valve element substrate of a cylindrical structure; the rubber block is embedded into the bottom of the valve element substrate; the anti-friction rings are embedded into the cylindrical face of the valve element substrate and protrudes out of the cylindrical face; an O-shaped rubber sealing ring is arranged between the stop iron and the valve body; and the stop iron and the valve body are connected into a whole through laser welding.

The invention relates to a floor slab for a kitchen/bathroom. The floor slab comprises a steel frame and kitchen/bathroom concrete ground, wherein the kitchen/bathroom concrete ground is located on the steel frame, the steel frame and a steel mesh in the kitchen/bathroom concrete ground are integrally welded, concrete is poured, the kitchen/bathroom concrete ground is internally provided with lifting seats which are used for lifting and are arranged in a supporting way in a prefabricating way, and the edge of the kitchen/bathroom concrete ground is provided with a horizontal reinforcing bar which is used for connecting. The floor slab for the kitchen/bathroom, disclosed by the invention, integrates the advantages of a concrete floor slab and a steel-structure floor slab and has the advantages that the cost is lower, the lifting installation is convenient, the construction speed is fast, materials are saved, standardized mass production in a factory can be realized, and the floor slab can be assembled at random.

The invention provides a meibomian gland cleaner, and relates to the technical field of medical apparatuses and instruments. The cleaner comprises a fixing clamp, a pressing piece and a fixing piece;the fixing clamp is arranged at the open end, one side of the open end can stretch into the eyelid so that the fixing clamp can be clamped to the inner and outer sides of the eyelid (the inner side isthe conjunctiva palpebrae face, and the outer side is the eyelid skin face), and the fixing piece and the fixing clamp are connected for limiting the opening degree of the open end so that the fixingpiece can abut against the two sides of the eyelid; a track opening is formed in the side, on the outer side of the eyelid, of the fixing clamp, one end of the pressing piece is provided with a pressing part matched with the track opening, the pressing part can abut against the skin on the outer side of the eyelid, and the pressing part can move relative to the path defined by the track opening so that excreta inside the meibomian gland can be extruded from the opening of the eyelid and flow out. Due to the fact that one side of the fixing clamp can fit the conjunctiva palpebrae face, no damage is caused to the conjunctiva palpebrae. In the extrusion process, the skin of the eyelid on the outer side of the eye is pressed, pain of the patient is obviously lowered, extrusion is uniform, anduse is convenient.

The invention provides a slewing bearing structure, a rotary table and an operation machine. The slewing bearing structure comprises a shell, a rotary shaft assembly, a radial bearing and an axial bearing. The rotary shaft assembly is arranged in the shell in the vertical direction of the shell. The radial bearing is arranged in the shell, coaxially sleeves a main shaft of the rotary shaft assembly and exerts a first acting force in the radial direction on the main shaft, so that the rotary shaft assembly and the radial bearing have the same axis. The axial bearing is arranged in the shell, coaxially sleeves the main shaft and arranged opposite to a thrust disc of the rotary shaft assembly in the axial direction. The axial bearing applies a second acting force which is upward in the axial direction to the thrust disc, so that the rotary shaft assembly is kept in a suspension state in the axial direction. According to the slewing bearing structure, the rotary table and the operation machine, contact friction between movable and static parts of the slewing bearing structure can be avoided, the frictional resistance moment is reduced, the power consumption and slewing noise of the slewing bearing structure are reduced, the service life of the slewing bearing structure is prolonged, and the maintenance-free performance of the slewing bearing structure is improved.

A bearing system comprises bearing sleeve, bearing core and lubricant layer between them. To the outer surface of the bearing core or the inner surface of the bearing sleeve is coated with nanometer coating. The lubricant layer in between is a polymer material of dual functional of hydrophilic and hydrophoby, which reduces friction and prolong life time.