40results about How to "Reduce direct friction" patented technology

The utility model discloses an automobile big box with a mounting mechanism, which relates to the technical field of automobile accessories and comprises a frame and a connecting rod, a box body is arranged above the frame, a fixing frame is welded at the rear end of the frame, and the connecting rod matched with the fixing frame is welded at the bottom of the rear end of the box body. According to the automobile large box frame with the mounting mechanism, the base at the front end is provided with a positioning groove, when a positioning rod at the bottom of a box body is embedded into the base, a circular-truncated-cone-shaped connecting block at the bottom of the positioning rod can abut against a triangular clamping block in the base, and when the connecting block moves downwards, the clamping block can be pushed to move towards one side of the connecting block; after the connecting block moves downwards and does not abut against the clamping block, the clamping block resets along with the elastic effect of the spring, the clamping block is located at the upper end of the connecting block, the clamping block, the connecting block and the positioning rod are in clamped connection, the front end of the box body and the frame can be more easily, conveniently and rapidly assembled and disassembled, the operation time is greatly shortened, and the working efficiency is improved. And the working efficiency is improved.

The utility model relates to the technical field of garbage recycling, in particular to a discharging mechanism of a dehydrator. The shell cover detachably covers the upper part of the shell; the feeding hole is formed in the shell cover and is vertically formed in the vertical direction of the shell; the discharging hole is formed in the lower end of the shell; the screen is rotationally arranged in the shell and is used for separating water in garbage; the centrifugal rotating assembly is rotationally arranged in the machine shell and used for driving garbage in the screen to do centrifugal motion, and the differential motion assembly is arranged in the machine shell and used for driving the screen and the centrifugal rotating assembly to do differential rotation. The anti-abrasion assembly is arranged on the inner wall of the machine shell and located below the screen, and the water collecting tank is fixedly arranged in the machine shell and surrounds the outer wall of the screen. The device aims at reducing the abrasion effect of garbage discharged out of the centrifugal cylinder on the inner wall of the machine shell as much as possible.

The utility model relates to the technical field of storage equipment, in particular to a waste slurry storage tank. Comprising a support frame, a storage tank, a stirring mechanism, a mounting seat, bolts, a fixing frame, a water distribution pipe, nozzles, a connecting pipe and the like, a storage tank is arranged on the upper side of the supporting frame, a feeding port and a discharging port are formed in the upper side and the lower side of the storage tank respectively, a stirring mechanism is arranged in the storage tank, a mounting port is formed in the upper side of the storage tank, a mounting seat is slidably arranged in the mounting port and fixed to the storage tank through bolts, a fixing frame is arranged on the lower side of the mounting seat, and a water distribution pipe is arranged on the fixing frame. A plurality of nozzles are uniformly arranged on the lower side of the water distribution pipe. Through the design of the water distribution pipe, the spray head and other components, the cleaning device can be matched with a stirring mechanism to clean the interior of the storage tank, the manual cleaning cost is reduced, and through the design of the mounting base, the bolt, the water pipe connector and other components, the mounting base can be quickly disassembled, so that the water distribution pipe, the spray head and other components can be independently cleaned or replaced.

The utility model relates to the technical field of press block wear-resistant gaskets, and one embodiment of the utility model provides an automatic press block wear-resistant gasket feeding device which comprises an assembling mechanism, a centrifugal disc mechanism is arranged on the left side of the assembling mechanism, and a placing mechanism is arranged on the front side of the assembling mechanism. According to the automatic feeding device for the wear-resistant liners of the pressing blocks, the wear-resistant liners on the linear track are blown through the air pump and the air pipe, the wear-resistant liners are rapidly moved to the rightmost end of the track under the action of air pressure, and compared with a traditional automatic feeding device for the wear-resistant liners of the pressing blocks, the automatic feeding device for the wear-resistant liners of the pressing blocks blows the wear-resistant liners through the air pipe. Direct friction between the liner and the surface of the track is reduced through airflow pushing, the service life of the track is prolonged, meanwhile, the feeding speed is remarkably increased, the material blocking risk is reduced, and use is convenient; by means of the technical scheme, the technical problem of rail abrasion in the related technology is solved.

The application relates to the technical field of automobile part molds, and discloses an automobile part mold guide column, which comprises a lower mold and an upper mold, wherein the upper mold is located above the lower mold. The automobile part mold guide column is provided with a soft sleeve outside the ball guide column, can play a buffering and isolating role when the mold and the ball guide column relatively move, and the soft sleeve made of polytetrafluoroethylene has very low friction coefficient and good self-lubricating property. When the guide hole of the mold is in contact with the ball guide column and relatively slides, the soft sleeve first contacts the inner wall of the guide hole, the soft and smooth surface of the soft sleeve can effectively reduce the direct friction force between the two, the surface material of the ball guide column or the guide hole of the mold is prevented from being scraped and worn due to high-intensity friction, meanwhile, the soft sleeve can also fill the possible tiny gap between the ball guide column and the guide hole, the movement is more stable, the additional friction and wear caused by shaking and impact are reduced, and the pulling phenomenon of the ball guide column and the mold is avoided.

This application provides a beverage device, relating to the field of beverage equipment technology. The beverage device includes a frame, a brewing assembly, a liquid injection pipe, and a scraping assembly. The brewing assembly is mounted on the frame and includes a brewing chamber and a liquid injection hole, with the liquid injection hole communicating with the brewing chamber. The liquid injection pipe is located outside the brewing assembly, opposite to the liquid injection hole, and is movably connected to the frame. The scraping assembly includes a scraping rod and a transmission linkage. The scraping rod is located at the top of the brewing assembly and is used to push the extracted residue at the top of the brewing assembly out of the brewing assembly during rotation. One end of the transmission linkage is fixedly connected to the scraping rod, and the other end is drivenly connected to the liquid injection pipe. The transmission linkage is used to drive the scraping rod to rotate during rotation and to drive the liquid injection pipe to insert or remove from the brewing assembly, thereby connecting or separating the liquid injection pipe from the liquid injection hole. This beverage device has a simple structure, is easy to assemble, and has low cost.

The utility model relates to mechanical design technical field discloses a high accuracy balance air conditioner engine crankshaft, including front end spindle neck, the front end spindle neck rear side fixedly connected with first connecting sleeve, first intermediate spindle neck is fixedly connected with first connecting sleeve rear portion, first intermediate spindle neck outside fixedly connected with front balance ring, first intermediate spindle neck left and right sides all fixedly connected with primary crank arm, primary crank arm inside fixedly connected with primary connecting rod axle neck, primary crank arm bottom fixedly connected with primary crank balance weight, the crank balance weight bottom fixedly connected with balance counterweight sliding block, first intermediate spindle neck rear portion fixedly connected with secondary crank assembly, the utility model discloses, this crankshaft passes through multiple spindle neck dispersion load, promotes the alternating complex load capacity, axle neck cover and lubrication structure stable gap, balance weight and adjusting screw optimization dynamic balance, reduce the failure risk greatly.

The utility model relates to the technical field of noise reduction devices, in particular to a noise reduction device for bearing machining, which comprises a noise reduction pad and anti-skid particles, the anti-skid particles are fixedly connected to the lower side of the noise reduction pad, a vibration and noise reduction mechanism is arranged on the inner side of the noise reduction pad, the vibration and noise reduction mechanism comprises a fixed cylinder, and the inner side of the fixed cylinder is tightly attached to a rubber ring sleeve. A movable bearing table is slidably connected to the inner side of the rubber ring sleeve, a piston sleeve sleeves the outer side of the movable bearing table, the lower side of the piston sleeve is tightly attached to the upper end of the noise reduction spring, a connecting through hole is formed in the inner side of the side edge of the lower end of the fixing cylinder, and a damping vibration attenuation assembly is fixedly connected to the outer side of the fixing cylinder and comprises a communicating pipe; according to the multi-layer structure design and the hydraulic damping principle, effective buffering of mechanical vibration and remarkable reduction of noise are achieved, and the vibration reduction and noise reduction performance and stability of the device are further enhanced through structural optimization and detailed design of each further-implemented scheme.

The utility model discloses a part transfer trolley for an automobile part machining workshop, and belongs to the technical field of automobile part machining equipment. The trolley comprises a trolley base, a trolley hopper and idler wheels. The trolley base is provided with a bottom plate, a baffle, universal wheels and a pushing handle. The car hopper is provided with a rectangular shell, a positioning plate, a positioning hole, a supporting rod, a clamping tenon and a car hopper clamping groove. The rollers are provided with cross rods and rotating shafts. The engine hood is convenient to store and take through rolling of the rollers, abrasion is reduced through the rubber sleeves, and stacking storage is achieved through cooperation of the clamping grooves and the clamping tenons. The problems that an existing transfer trolley is inconvenient to store and take, prone to abrasion and incapable of being stacked are solved, and the transfer trolley is suitable for transfer of automobile part machining workshops.

The utility model discloses a strip mine blast hole charging structure above a goaf and a layered explosion control system, which adopt a subsection charging structure, adjacent explosive sections are separated by an air column, a buffer layer with a honeycomb structure is arranged between the explosive section at the bottommost layer and the bottom of a blast hole, the air column is arranged above the explosive section at the topmost layer, and the hole is sealed by stemming; the explosive section is filled in the blasting energy gathering pipe and is separated from the wall of a blast hole, a main stress compensation layer and an auxiliary buffer layer are sequentially and fixedly arranged close to the wall of a goaf top plate, the main stress compensation layer is laid by foam blocks, the auxiliary buffer layer is a hard plate, direct friction between the foam blocks of the main stress compensation layer and the goaf top plate is reduced, and local stress concentration is dispersed. According to the utility model, through directional energy release of the blast hole charging structure of the strip mine at the upper part and cooperation of active stress compensation and vibration monitoring in the goaf at the lower part, dual improvement of blasting efficiency and safety under the condition that the goaf exists is realized.

The application discloses a conveying and discharging regularity device in cigarette case gold stamping production, which comprises a conveying device for posture regularity and stable conveying of cigarette case paperboard and a collecting device for automatic discharging regularity of the cigarette case paperboard, the output end of the conveying device is fixedly connected with the input end of the collecting device, the conveying device realizes accurate posture regularity of the cigarette case paperboard through cooperation of a fluctuating air cushion, a stepped flow guide and ultrasonic radiation pressure, the collecting device realizes automatic discharging regularity through gravity self-adaptive driving side regularity, and the cigarette case paperboard after gold stamping is regularly conveyed by the conveying device and then enters the collecting device to be automatically regularly collected, the application can accurately correct the conveying posture of the cigarette case paperboard and ensure that the cigarette case paperboard is always stably conveyed along a preset track, thereby laying a solid foundation for regularity of subsequent discharging and collecting.

This application discloses a hyperboloid roller skating rink, belonging to the field of sports field construction structure technology. It includes an outer field, an inner field, fencing, protective mechanisms, and reinforcing support mechanisms. The rink is divided into an outer field and an inner field by the fencing. The inner field includes a track and a lawn. The track has a hyperboloid design, including a smooth zone, a transition zone, and an acceleration zone. This application uses the fencing to distinguish the inner and outer fields. The inner field has a track and a lawn. The hyperboloid design, with its continuous undulations, not only increases the difficulty of the track but also enhances its fun factor, making it popular among sports enthusiasts. It has a high usage rate and popularity, thereby improving productivity and promoting the expansion of roller skating rinks and the popularization of roller skating. By placing the roller skating rink outdoors, it can accommodate more people to watch. Simultaneously, the lawn outside the track in the inner field reduces direct friction between the skater and the ground after a fall, thus reducing injury and greatly improving the practicality of the device.

The utility model discloses a window body connecting structure and a curtain wall horizontal sliding window, relates to the technical field of doors and windows, and adopts the technical scheme that the window body connecting structure comprises a first connecting component and a second connecting component, a middle component is arranged between the first connecting component and the second connecting component, the middle component comprises a limiting rod group, and the limiting rod group is a foldable or extendable rod body combination; and the limiting rod group can enable the first connecting main body and the second connecting main body to be close to or far away from each other in a parallel posture. The window body connecting structure has the beneficial effects that the window body connecting structure in the scheme enhances the connecting stability while ensuring the connecting flexibility, and avoids the problem of unstable swinging caused by the dead weight of the window sash and the high-rise wind pressure. Long-term stable and reliable operation of the curtain wall horizontal sliding window is guaranteed, the service life of the window body connecting structure is prolonged, the maintenance cost and the use risk are reduced, and the curtain wall horizontal sliding window connecting structure has high popularization value and economic benefits in practical application.

The utility model relates to a kind of airing rod telescopic mechanism and clothes airing machine, to solve the problem of not smooth, easy to wear and tear of airing rod telescoping in prior art, by setting movable roller assembly in the rod cavity bottom wall of fixed main rod, and setting second roller on the end face of the plug of telescopic rod, when telescopic rod is telescoped in fixed main rod, multiple rollers support and limit telescopic rod from different directions, reduce the friction between telescopic rod and inner wall of fixed main rod, realize more smooth telescoping effect, at the same time, through the cooperation of multiple roller design, sliding slot and roller assembly, avoid telescopic rod shaking, tilting, improve the stability of telescopic rod telescoping, reduce the wear and tear of telescopic rod and main rod, prolong service life.

This utility model relates to the field of hydraulic transmission equipment technology, specifically to a composite dual-turbine hydraulic torque converter, comprising a dual-turbine hydraulic torque converter body, an input shaft disposed at the input end of the dual-turbine hydraulic torque converter body, and an output shaft disposed at the output end of the dual-turbine hydraulic torque converter body. Both the input and output shafts are fitted with sealing sleeves, which are detachably mounted on the dual-turbine hydraulic torque converter body. A rigid clamping ring is disposed inside the sealing sleeve and fitted onto the corresponding shaft. An inner sealing ring is disposed between the rigid clamping ring and the front cylindrical body of the sealing sleeve. An inner bushing is disposed on the rear side of the rigid clamping ring. Inner fitting gaskets are disposed on both the inner and outer end faces of the inner bushing. The inner fitting gasket on the inner side fits onto the corresponding shaft, and the inner fitting gasket on the outer end face abuts against the rear side of the rigid clamping ring. This utility model has good sealing performance, achieving the effect of improving sealing reliability and ensuring stable equipment operation.

This application provides a strip rolling apparatus, relating to the field of rolling technology, for efficiently controlling the surface roughness difference on both sides of the strip thickness. The strip rolling apparatus includes a rolling mechanism, a flattening mechanism, and an adjusting mechanism. The rolling mechanism includes two rolling rolls that rotate to transmit the strip located between them and apply a rolling force to bring the strip closer to each other along a first direction. The flattening mechanism includes multiple flattening rolls arranged sequentially along the strip transmission direction for rotating to continuously transmit the strip and projecting onto the same projection plane along the transmission direction, with the projection portions of adjacent flattening rolls overlapping. The adjusting mechanism includes an adjusting member disposed between the flattening mechanism and the exit end. The adjusting member can move up and down along the first direction to contact or separate from the strip. When the adjusting member is in contact with the strip, it is used for contact friction with the strip. The first direction is the thickness direction of the strip. The strip rolling apparatus is used for rolling strip.

This utility model discloses a flexible coupling for a small plunger pump motor shaft, belonging to the field of coupling technology. It includes a pair of connecting bushings for connecting the motor output shaft and the plunger pump input shaft. Both bushings are hollow, and a connecting disc is fitted at each end close to the other. An elastic connector is provided between the two connecting discs, suspended between them. Six sets of wear-resistant pads are circumferentially distributed at equal intervals on both sides of the elastic connector, and these six sets of wear-resistant pads are in contact with the two connecting discs. The elastic connector is made of rubber and is hexagonal. This technical solution effectively solves the problems of rigid couplings being unable to compensate for displacement and having high vibration and noise, as well as the problems of existing flexible couplings having complex structures, limited buffering effects, and rapid wear of the elastic body, through the structure of the hexagonal elastic connector made of rubber, wear-resistant pads, connecting bushings, and connecting discs. It is also easy to maintain and extends service life.

A membrane switch structure capable of prolonging the service life of a key comprises a conductive base material, conductive ink, an isolation rubber material and a panel which are sequentially arranged from bottom to top, a hole is dug in the isolation rubber material to form an assembly cavity communicated with the conductive ink and the panel, a metal elastic piece is arranged in the assembly cavity, and hardened ink is arranged on the portion, making contact with the conductive ink, of the metal elastic piece in a cushioned mode. According to the membrane switch structure capable of prolonging the service life of the key provided by the utility model, the hardened printing ink is padded at the contact part of the metal elastic sheet and the conductive printing ink, so that when the metal elastic sheet is pressed, the hardened printing ink can buffer the pressure of the metal elastic sheet on the conductive printing ink, and the direct friction between the metal elastic sheet and the conductive printing ink is reduced; the risk that the conductive ink is pressed and damaged is effectively reduced, and the service life of the key is remarkably prolonged.

The utility model provides a through-cable drill pipe centralizer for double-pipe directional drilling, which comprises a support shell and a support tile arranged on the outer side surface of the support shell. A first shaft body and a second shaft body are arranged in the support tile, and concentric rolling wheels are arranged on the outer side face of the first shaft body and the outer side face of the second shaft body in a sleeving mode. According to the cable-passing drill pipe centralizer for double-pipe directional drilling, in the structural design of the supporting shell and the support tile, the first shaft body parallel to the axis of the supporting shell and the second shaft body perpendicular to the axis of the first shaft body are arranged, and the concentric idler wheels are arranged on the outer side faces of the first shaft body and the second shaft body in a sleeving mode; when the centralizer is placed on the inner side face of the outer pipe to work, the concentric idler wheels can roll on the inner side face of the outer pipe, and in the double-pipe rotary drilling process, the concentric idler wheels can effectively reduce direct friction between the inner pipe and the outer pipe, so that the construction progress is guaranteed, the construction cost is reduced, and safety accidents are reduced.

The invention relates to the technical field of transfer structures, in particular to a transfer structure and method for cylindrical prefabricated parts. The technical scheme comprises a vehicle body; the storage bin is mounted on the rear half section of the vehicle body and used for temporarily storing prefabricated parts; the sorting mechanism is arranged on the front half section of the vehicle body and used for receiving the prefabricated parts conveyed by the storage bin; the rotary discharging mechanism is located at an outlet of the sorting mechanism and used for discharging the prefabricated parts; and the induction counter is mounted at the front end of the vehicle body and is used for counting the prefabricated parts unloaded by the rotary unloading mechanism. According to the invention, the labor intensity of workers is reduced, the transfer efficiency and the production continuity are improved, the damage to products and equipment is reduced, the counting accuracy is improved, the equipment universality is enhanced, and the equipment modification cost is reduced.

The invention discloses a color paste composition for silk-screen printing and a preparation method thereof. The color paste is composed of base ink, white ink, flaky pearl powder, hole protection particles, an orientation induction auxiliary agent and a solvent, the flaky pearl powder has bimodal sheet diameter distribution, and the hole protection particles are silane modified spherical silicon dioxide or hollow glass beads. The color paste prepared from the composition has the advantages of excellent screening property, stable orientation and small color difference fluctuation, and can realize the consistency of metal texture and hue in continuous printing of decorative paper.

The utility model belongs to the technical field of shoe material, especially relate to a double -layer wear -resisting shoe sole, including shoe sole, the shoe sole includes upper bottom and lower bottom, the first wear -resistant block and the second wear -resistant block are slidably connected with the abutment block, the first wear -resistant block and the second wear -resistant block are provided with support piece, the support piece is equipped with the sliding slot of accommodating abutment block movement, the sliding slot is equipped with the tension spring of pulling abutment block reset, through using this device, when walking in rough inclined ground or the ground with sandstone, in order to avoid skidding, the body gravity is downward, and the stress of the tip of the foot and the heel is bigger, when moving forward and rubbing, because the shoe sole moves forward and the ground is immobile, the mutual force of both pushes the abutment block to move, makes the abutment block move along the sliding slot of support piece, and stretches and drives the expansion assembly of tension spring, makes the expansion bag expansion and pushes out wear -resistant layer and ground contact, thereby reduces the direct friction of shoe sole and ground, reduces the wear and tear of shoe sole, increases the service life of shoe sole.

The utility model belongs to the technical field of glass positioning and clamping, and relates to a glass processing positioning and clamping mechanism which comprises a base. A supporting column is fixedly connected to one side of the top of the base. The top of the supporting column is fixedly connected with a top supporting plate. The clamping and positioning assembly is located in the middle of the inner side of the base; a downward-pressing stabilizing mechanism and an airflow cleaning mechanism are arranged in the downward-pressing stabilizing mechanism, and after the downward-pressing stabilizing mechanism finishes working, the clamping positioning assembly, the downward-pressing stabilizing mechanism and the airflow cleaning mechanism are used, so that after glass is machined, a supporting rod moves along with a clamping block, and the downward-pressing stabilizing mechanism and the airflow cleaning mechanism are fixed; the pressing plate is always located at the edge position of the glass needing to be clamped, the bottom of the pressing plate is cleaned through air flow generated by lifting of the pressing plate and mutual cooperation of the pressing plate and the cleaning air bag, and the situation that scratches are caused to the surface of the glass needing to be machined next time by chippings left at the bottom of the pressing plate is reduced; the influence on the attractiveness and the quality of a glass finished product is reduced, and the practicability of the device is improved.

The utility model discloses a jet type air conditioner noise reduction structure, which relates to the technical field of air conditioners and comprises an air conditioner body, a mounting frame is fixedly connected to one side of the air conditioner body, a fixing component is arranged between the mounting frame and the air conditioner body, and a sound insulation air outlet box is mounted on the mounting frame. By the adoption of the structure, airflow generated by an air conditioner enters the sound insulation air outlet box, the silencer can absorb and reflect part of sound waves, and therefore noise transmission is reduced, the airflow obtained after noise reduction passes through the jet flow barrel, the design of the jet flow barrel is beneficial to optimizing the flowing path of the airflow and reducing formation of vortexes, and therefore the air outlet efficiency is improved, and the noise reduction effect is improved. According to the air conditioner air outlet, airflow enters the grating plate area, the grating plate is composed of a plurality of small holes or gaps and used for further dispersing and slowing down the airflow speed and reducing direct friction between the airflow and an air opening material, so that noise is reduced, the airflow noise of the air conditioner air outlet can be remarkably reduced, the comfort degree of a user is improved, and interference to the surrounding environment is reduced.

This utility model provides an intelligent force-controlled lightweight lithium-ion battery pruning machine. The machine includes a cutting blade and comprises a motor housing, a gear reduction mechanism, and an eccentric wheel. The motor housing has a motor output end. The gear reduction mechanism is connected to the motor output end and includes a rotating shaft. The eccentric wheel is fixed on the rotating shaft and connected to one end of the cutting blade. The gear reduction mechanism also includes a connecting end, and an oil seal mechanism is provided between the connecting end and the motor output end. This utility model solves the problem of excessive internal moving parts in pruning machines, leading to repeated friction during high-frequency shearing operations, resulting in a higher failure rate and increased equipment maintenance costs.

An aerosol generating device includes a housing including an opening into which an aerosol generating article is insertable, a door body movable with respect to the housing to open and close the opening, and a bearing between the door body and the housing and configured to movably support movement of the door body with respect to the housing by rotation.

The utility model relates to the technical field of commutators, in particular to a pear hook type commutator seat with a good wear-resistant effect, which comprises a base, copper sheets, a pear hook frame, a connecting seat and a fixing piece, the outer side of the base is provided with a plurality of groups of copper sheets, and one end of each copper sheet is provided with a hook corner. Compared with a traditional key groove connection mode, the novel structure is provided with the mounting groove, the bearing groove and the like, a certain space is formed between the base and the pear hook frame, channels for air circulation are increased, heat dissipation is facilitated, the problem that heat dissipation is difficult after a commutator is used for a long time is solved, and the commutator is simple in structure and convenient to use. The optimized connecting structure reduces direct friction at the joint of the base and the rotating shaft. And the pear hook frame is connected with the base through the connecting seat, so that disassembly, assembly and replacement are convenient, the fixing piece is stable, abrasion caused by friction is reduced, the service life of the commutator seat is prolonged, and the precision of equipment is ensured.

This utility model relates to the field of mechanical engineering, and more particularly to a protection device for a gantry dual-drive synchronous motion system with adjustable margin. The dual-drive synchronous mechanism consists of two transmission mechanisms, each containing a dual-axis motor, lead screw, pulley, and belt, providing power to the crossbeam. The crossbeam moving mechanism includes a crossbeam and a base, with lead screws connected to both ends of the crossbeam. Position sensors are installed on the crossbeam to detect the relative height of the two ends to ensure synchronization. The protection mechanism includes a limiting component and a tensioning component. The tensioning component is used to adjust the tension of the transmission belt, achieving adjustable margin to adapt to different working conditions. The limiting component not only restricts the movement range of the synchronous pulley, but its limiting position is also adjustable, thereby setting the allowable working range margin of the synchronous pulley. This invention ensures the motion synchronization of the gantry system through position sensor feedback and dual margin adjustment, and improves the reliability and adaptability of the system by protecting key components through limiting.

This invention discloses a method for coating SiO with nano-PMMA as the core. 2 / CeO 2 A method for preparing double-shell abrasives relates to the field of composite abrasive technology. The method includes the following steps: First, a soap-free emulsion polymerization method using a boiling system is employed, with methyl methacrylate as the monomer and 3-(methacryloyloxy)propyltrimethoxysilane as the coupling agent. The polymerization reaction is initiated with 2,2'-azobisisobutylamidine dihydrochloride to prepare PMMA microspheres with controllable particle size and good monodispersity. Then, using tetraethyl silicate as the raw material, a strawberry-shaped PMMA / SiO2 microsphere is prepared using the sol-gel method. 2 Composite microspheres; finally, nano-CeO was prepared by homogeneous precipitation using soluble cerium salt as raw material and hexamethylenetetramine as precipitant. 2 Uniformly coated double-shell PMMA / SiO 2 / CeO 2 Composite abrasive; this abrasive has a flexible core and a large number of surface active sites, which can achieve lower surface roughness and higher material removal rate in ultra-precision surface polishing.

The invention discloses a lubricating system capable of accelerating degassing and shortening engine oil pressure establishment time, relates to the technical field of engine oil lubrication, and solves the technical problem that an existing engine starting mode easily causes irreversible initial wear to an engine. The system comprises an electric pre-feed oil pump oil inlet pipe, an electric pre-feed oil pump oil outlet pipe and an electric pre-feed oil pump, the oil pan pipeline connector is connected with the electric pre-supply oil pump through the electric pre-supply oil pump oil inlet pipe, the electric pre-supply oil pump is connected with the engine oil filter through the electric pre-supply oil pump oil outlet pipe, and the engine oil filter is connected with a main oil duct of an engine through the engine oil filter oil outlet pipe and the main oil duct supply oil pipe. Before an engine is started, a pre-oil-supply strategy is triggered to quickly start the engine. Direct friction between metal parts of the engine is reduced, and abrasion and power loss are reduced.