70results about How to "Avoid contact collision" patented technology

The invention provides a drop protection method and terminal equipment, the terminal equipment comprises a foldable first display component and a foldable second display component, and the method comprises the following steps: when the terminal equipment is in a drop state, obtaining a first folding posture formed by the first display component and the second display component; Controlling the folding postures of the first display component and the second display component to be adjusted from the first folding posture to the second folding posture under the condition that the first folding posture meets the preset condition; And in the second folding posture, the orientations of the first display surface of the first display part and the second display surface of the second display part are opposite to the falling direction of the terminal equipment, or the first display surface of the first display part is attached to the second display surface of the second display part. Therefore, the probability of damage of the terminal equipment in the whole falling process can be reduced, and the falling reliability of the terminal equipment is improved.

The invention provides a horizontal vibration linear motor which comprises a motor shell, a cover plate and a vibration assembly. The cover plate is installed on the motor shell in a covering mode, an installation space is formed by the cover plate and the motor shell, the vibration assembly is hung in the installation space through location of elastic supporting pieces located on the two opposite lateral walls of the motor shell respectively and comprises a vibration block and a permanent magnet installed on the vibration block, the permanent magnet can drive the vibration assembly to perform reciprocated vibration in the direction basically parallel to the bottom face of the motor shell under the effect of the magnetic field force and enables the two elastic supporting pieces located on the opposite lateral walls to be correspondingly stretched and retracted in the vibration process, and a limiting device for limiting the reciprocated vibration amplitude of the vibration block is further installed in the installation space. According to the horizontal vibration linear motor, the capacity for overcoming faults such as short circuits can be improved, and the whole quality level of machines with the motor is easily improved.

The invention relates to a robot-assisted fracture space collision-avoidance reduction path planning method. The method comprises the following steps: aiming at a long bone spiral fracture type and the position and posture deviation of a fracture far end relative to a near end after the long bone spiral fracture, utilizing Mimics and Geographic studio software to determine a reduction path by a method based on uninjured side bone image registration, wherein the fracture near end is firmly fixed, and robot-assisted reduction operation of the fracture far end is divided into three steps of moving, rotating and moving relative to the fracture near end. The reduction path of the fracture far end is determined by adopting a three-dimensional space A * algorithm. The fracture distal end is rotated relative to the near end to adjust the pose of the fracture distal end until the fracture distal end and near end reach an ideal anatomical state. According to the method, the position and posturedeviation of the far end of the fracture relative to the near end after the long bone spiral fracture is considered, meanwhile, obstacles possibly occurring in the reduction process are considered, contact and collision in the robot-assisted fracture reduction process are avoided, and the safety of robot reduction operation is effectively improved.

The invention belongs to the technical field of bridges, in particular to a wave-resistant anti-collision pier for a sea-crossing bridge. For solving the problem that a device is easily damaged in thelong-term sea wave collision contact process, a solution is provided and is characterized in that the wave-resistant anti-collision pier includes a grouting barrel; four supporting rods distributed in an annular array mode are welded to the bottom of the circumferential inner wall of the grouting barrel; the same vertically-placed positioning pipe is welded among the four supporting rods; the topend and the bottom end of the positioning pipe are both arranged to be of a bucket-shaped structure; three auxiliary rods distributed in an annular array mode are welded to the top end of the circumferential inner wall of the positioning pipe; the same vertically-placed positioning rod is welded among the three auxiliary rods; and the positions of the positioning rod and the positioning pipe correspond to each other. According to the wave-resistant anti-collision pier, when sea waves are in collision contact with the mounting plate and the fixing plate, the impact force of the sea waves is dispersed by utilizing the irregular surfaces of the mounting plate and the fixing plate, so that the force borne by the buffer spring and the piston is reduced, and the impact of the sea waves is further reduced, and the service life of the device is prolonged.

The invention provides an automatic transfer device of hard alloy blades. The automatic transfer device comprises a first lead screw lifter, a second lead screw lifter, a first laser range finder, a second laser range finder, a vacuum chuck, an electromagnetic chuck, a controller, a piling car, a collecting car, a distance sensor, a motor, guide rails and a guide rail frame. The first lead screw lifter and the second lead screw lifter are mounted on the guide rail frame. The first laser range finder is connected with the electromagnetic chuck. The electromagnetic chuck is connected with the first lead screw lifter. The second laser range finder is connected with the vacuum chuck. The vacuum chuck is connected with the second lead screw lifter. The piling car, the collecting car and a collector can move on the guide rails. The controller, the distance sensor and the motor are mounted on the guide rail frame. According to the automatic transfer device, manual labor is replaced, and the production cost is reduced; and the blade transfer efficiency is high, the product percent of pass is improved, and the automatic transfer device is suitable for transfer of the hard alloy blades of various types.

The invention relates to the technical field of disinfection, and further discloses a sole cleaning and disinfecting device based on an electromagnetic induction principle. The sole cleaning and disinfecting device comprises a rotating rod and an outer shell, wherein a gear is fixedly connected to the outer part of the rotating rod; a clamping wheel is movably connected to the exterior of the gear; a rotating shaft is clamped in the clamping wheel; a bevel gear is fixedly connected to the exterior of the rotating shaft; an interlayer is fixedly connected to the interior of the outer shell; a shoe placing rod is movably connected to the exterior of the interlayer; a first lead screw is movably connected to the interior of the interlayer; and a second lead screw is movably connected to the interior of the interlayer. Under the interaction of the rotating rod, the outer shell, the gear, the clamping wheel, the rotating shaft, the bevel gear, the interlayer, the shoe placing rod, the screwrod I, the screw rod II, a movable rod, a sliding block, a cleaning plate and a spraying plate, the sole cleaning and disinfecting device can be used for cleaning sundries on the soles and carrying out alcohol disinfection on the soles and the sundries, and the situation that disinfection is not thorough when alcohol disinfection is carried out on the shoe sole can be avoided through cleaning ofthe sundries on the soles.

The invention belongs to the field of high-temperature molten steel continuous casting and relates to a continuous casting block-preventing immersion type water opening which comprises a body, a mainhole and side holes. The main hole is located in the body. The side holes are located in the two sides of the body and communicate with the main hole. The number of the side holes is not less than onepair. The side holes are designed in the manner that the two side walls expanding outwards with the angle a or the arc shape with the r as the radius. The bottoms of the side holes expand downwards with R as the radius, and the bottoms of the side holes and the tops of the side holes with the downward angle b form lower side holes of the immersion type water opening. According to the novel blocking-preventing immersion type water opening, in the process of flowing the side holes of the immersion type water opening of molten steel, nonmetallic inclusion particles in the molten steel directly flow out of the side holes of the immersion type water opening, the situation that the nonmetallic inclusion particles in the molten steel collide and make contact with the side walls of the side holesof the immersion type water opening is avoided, thus, impurities are prevented from adhering to the side walls of the side holes, the scaffolding and blocking phenomena of the side holes of the immersion type water opening are effectively prevented, and smooth production of continuous casting is ensured.

The embodiment of the invention discloses a rear protection device of a hydrogen transport vehicle. A vehicle-mounted ECU of the device determines the vehicle type of a rear vehicle based on a video image, and determines whether the rear vehicle collides with the hydrogen transport vehicle or not based on the relative speed and the vehicle distance according to various vehicle types; and when therear vehicle possibly collides with the hydrogen transport vehicle, a power assembly is controlled to drive the movable rear protection device to slide out of a frame assembly in a mode of sending anextending instruction to the power assembly, so that protection is formed, and the rear vehicle is prevented from colliding with a hydrogen storage device of the hydrogen transport vehicle during rear-end collision. Due to the fact that the movable rear protection device is connected to the frame assembly of the hydrogen transport vehicle in the sliding mode and extends out of the frame assembly only when the rear vehicle possibly collides with the hydrogen transport vehicle, the rear protection device in the embodiment of the invention does not occupy the length of the hydrogen transport vehicle, and the safety of the hydrogen transport vehicle is improved.

The invention discloses a laser cleaning control method and system based on LIBS technology online monitoring, and relates to the technical field of laser cleaning, the laser cleaning control system is researched and developed for achieving the laser cleaning control method, and the laser cleaning control system comprises a mainframe box, a laser cleaning system and an LIBS online monitoring system; the mainframe box is used for bearing the laser cleaning system and the LIBS online monitoring system, and the LIBS online monitoring system is used for collecting and monitoring plasma signals in the cleaning process of the laser cleaning system. According to the laser cleaning control method and system based on LIBS technology on-line monitoring, the dirt cleaning effect and cleaning efficiency of the surface of a cleaned target are greatly improved, on-line monitoring of the laser process is achieved, the laser cleaning process is more automatic, protection on a cleaned target base body is better improved, and the laser cleaning quality is improved. And the service life of the base body is further prolonged.

The invention discloses a cleaning device for cast parts. The cleaning device comprises a water tank. Support legs are arranged at four corners of the bottom surface of the water tank respectively. Adrain pipe communicating with an inner cavity of the water tank is arranged at the bottom surface of the water tank and provided with a drain valve. Bearing seats are arranged at the tops of the two ends of the water tank respectively. A rotating shaft is arranged between the two bearing seats through a bearing, and is provided with at least one rotating drum at equal intervals. According to the cleaning device for the cast parts, the cast parts are placed into a plurality of storage cavities through gaps between a second baffle and a first baffle, the storage cavities are separated by partition plates, and a rotating shaft is driven by a driving motor to drive the rotating drum to rotate, so that the cast parts in the storage cavities and cleaning liquid in an inner cavity of the water tank undergo contact-separation-contact processes in the rotating drum for cleaning, the plurality of cast parts can be quickly cleaned by using a small amount of the cleaning liquid in the water tank,the cleaning efficiency is higher, resources are saved, contact collision among the plurality of castings is avoided, and the quality of the cast parts is ensured.

The invention provides an electromagnetic valve and a connector thereof. The electromagnetic valve provided with a coil high in sealing reliability is safer and more convenient to use. The connector comprises a shell and a first sealing part with a through hole, a socket internally sleeves the shell and in inserted connection with an insertion piece of the coil of the electromagnetic valve, and the shell and the insertion piece are hermetically connected and axially positioned through a fastener. The shell and the socket are provided with axially through connection holes, the first sealing part internally sleeves the connection holes, and the head end of the fastener penetrates through the through hole of the first sealing part to be connected with the insertion piece. The first sealing part is provided with a protrusion matched with the tail end of the fastener. When the fastener is locked, a gap between the fastener and the shell is filled with the protrusion, so that sealing is realized, external dust and liquid can be prevented from entering the connector, and effectiveness in water and dust proofing is achieved.

The invention provides an electronic expansion valve and an insertion component thereof capable of preventing the short circuit caused by collision among terminals, and improving the using reliability. The insertion component comprises a connection socket and a contact pin, wherein the connection socket is hermetically connected with a shell of the electronic expansion valve, the contact pin is connected with an external control piece, and a valve chamber of a motor is built-in in the shell; the connection socket is provided with a sealing cavity communicated with the valve chamber, the sealing cavity is sleeved with an insulation sleeve, the insulation sleeve is provided with mounting positions corresponding to the terminals of the motor and all the mounting positions are alternately connected in an insulation way; the insulation sleeve is further provided with a connecting hole provided for the contact pin to pass through, one end of the contact pin penetrates through the connecting hole and is connected with the terminal, and the other end of the contact pin protrudes out the sealing cavity so as to form a connecting end used for being connected with the external control piece. All terminals of the insulation sleeve provided by the invention are provided with the corresponding positions, so that all the terminals are separated mutually, the short circuit caused by the touch collision among the terminals can be prevented, and the electronic expansion valve and the insertion component are safer and reliable to use.

A chip tantalum capacitor with a metal package structure and a package method thereof, adopting a metal package structure, wrapping a layer of bonding conductive glue on the outside of the tantalum chip, and then wrapping a layer of metal shell on the outside of the bonding conductive glue; One end is connected with a tantalum wire, and the tantalum wire is led out of the metal shell through the lead wire of the tantalum wire to form a chip tantalum capacitor with a metal package structure. The tantalum wire and the lead wire of the tantalum wire are connected by welding, and the welding point of the tantalum wire and the lead wire of the tantalum wire is located on the inner surface of the metal shell, and the welding point of the tantalum wire and the lead wire of the tantalum wire is covered with an insulating block, The space between the insulating block and the tantalum chip and the outside of the insulating block is also wrapped with adhesive conductive glue, so that the space between the tantalum chip, the tantalum wire and the lead wire of the tantalum wire, and the shell is relatively fixed.

The invention discloses a portable medicine sprayer for ear-nose-throat nursing, which comprises a protective shell; a protective cover is movably mounted at the upper end of the protective shell through a hinge; a pull groove is formed in the upper end of the protective cover; an annular ultraviolet sterilization lamp is fixedly mounted on the inner wall of the protective cover; a plurality of fixing bases are fixedly mounted on the upper inner wall of the protective cover; a medicine spraying hose is detachably mounted in the protective cover through a fixing seat; a medicine tank is slidably mounted in the protective shell; buffering mechanisms are fixedly mounted on the left side and the right side of the lower inner wall of the protective shell; the upper ends of the two buffering mechanisms are fixedly mounted at the upper end of the medicine tank; a stirring mechanism is connected to the lower end of the medicine tank in a penetrating mode; the upper portion of the stirring mechanism is located in the medicine tank; and an anti-settling stirring blade is arranged in the medicine tank. According to the portable medicine sprayer for ear-nose-throat nursing disclosed by the invention, solution mixing is uniform and efficient; the mixing time is short; a solvent is not prone to precipitation; the medicine effect is obvious; the medicine spraying hose is convenient to store and carry; the disinfection function is achieved; safety and reliability are achieved; observation is convenient; stability is high; and application and popularization can be achieved.

The invention discloses a metal part polishing device which specifically comprises a fixing base of which the top of is provided with a polishing groove, a fixing device which is arranged in the polishing groove and is in sliding connection with the inner wall of the polishing groove, and a supporting frame arranged on one side of the fixing base, wherein the top of the supporting frame is fixedly connected with a driving device, and the bottom of the driving device is connected with a polishing device through a telescopic rod; and the fixing device comprises a fixing ring, a limiting sliding way is formed in the inner wall of the fixing ring, an inlet is formed in one side of the fixing ring, clamping devices are arranged on the two sides of the inlet, and an inclined chamfer is formed in the top of the side face of the inner wall of the limiting sliding way. The invention relates to the technical field of machining. According to the metal part polishing device, the machine does not need to stop for replacement of abrasive paper, the polishing efficiency is high, maintenance is convenient, the pressing force between a metal part and the abrasive paper can be kept constant, the stable polishing effect can be conveniently guaranteed, and the metal part is convenient to mount and dismount.

The invention provides a control switch button protection component applied to the technical field of electrical equipment. A component body (1) of the protection component is of an n-shaped structure, a switch button (3) is arranged on a switch body (2), the component body (1) comprises a body left side face (4), a body right side face (5) and a body surface (6), the body left side face (4) and the body right side face (5) abut against a switch body left side portion (7) and a switch body right side portion (8) of the switch body (2) in a clamping mode respectively, and when the component body (1) is connected with the switch body (2), the switch button (3) is a structure located below an opening (7) of the body surface (6), and the switch button (3) is attached to the surface of the opening (7). According to the protection component, the switch button can be prevented from making direct contact with and colliding with the outside sundries and other tools, and meanwhile the protection component is simple in structure, convenient to mount and dismount and extremely low in production cost.

The invention discloses a threading device and automatic threading equipment. The threading device and the automatic threading equipment are installed on an embroidery machine; the embroidery machine comprises a rack, a certain number of machine heads and thread shafts arranged on the rack, and sewing threads between the machine heads and the thread shafts; a translation and swing mechanism is installed on the rack; the tail end of the translation and swing mechanism is connected with an installation and protection assembly; the installation and protection assembly comprises a shell and an installation bottom plate; the threading device is installed on the installation and protection assembly; the translation and swing mechanism is used for driving the threading device to move to the position of the machine head where threading is to be conducted and to be close to the machine head; and the threading device comprises a thread pulling mechanism, a thread leading and feeding mechanism, a calibration robot mechanism and a thread hooking mechanism on the calibration robot mechanism. The threading equipment moves to the machine head where threads are broken for threading after the threads of the embroidery machine and other textile equipment are broken, automatic threading is achieved, the efficiency of the textile equipment is improved, the labor cost is reduced, the mechanism can be directly and additionally installed on the existing embroidery machine, the interference with an existing structure is avoided, and the modification cost is low.

The invention discloses a coordinate measuring machine based on electromagnetic induction limiting, which comprises a base which is used for providing a platform for placing an object to be measured, two vertical arms which are used for sliding above the base, a horizontal bridge which is fixedly connected with the two vertical arms, a sliding block unit which slides on the horizontal bridge and a measuring probe unit which is installed on the sliding block unit and can move relative the sliding block unit. A first direction, a second direction and a third direction form three axes which are perpendicular to one another in a rectangular coordinate system. The vertical arms and the sliding block unit are provided with driving devices and magnetic detection devices. The base and the horizontal bridge are provided with magnetic limiting pieces which feed back signals to the magnetic detection devices through the magnetism of the magnetic limiting pieces and are used for limiting the positions of the vertical arms and the sliding block unit. The coordinate measuring machine based on electromagnetic induction limiting has the beneficial effects that the positions of the vertical arms and the sliding block unit on the base and the horizontal bridge are limited by using the principle of magnetic induction, the unnecessary contact collision is avoided, the relative stability of the vertical arms and the sliding block unit is guaranteed and the measuring accuracy of the coordinate measuring machine is improved; and the response sensitivity is high and the coordinate measuring machine is convenient to operate.

The invention relates to special equipment for road building and maintenance construction, in particular to a self-propelled slurry seal machine. The self-propelled slurry seal machine comprises a power transport vehicle chassis, a mixture stirring device and a micro-surfacing paving device. The micro-surfacing paving device comprises a paving box, a paving hopper arranged at the top of the pavingbox, a distribution mechanism arranged in the paving box, sliding rails arranged at the bottom of the paving box and a power transmission mechanism. The micro-surfacing paving device further comprises a self-walking mechanism and a material propelling mechanism, the material propelling mechanism is arranged on a carrier platform arranged at the top of the self-walking mechanism, the paving box isfixedly connected to the rear portion of the carrier platform, a feeding port in the front end of the material propelling mechanism is located under a discharging port formed in the mixture stirringdevice, and a discharging port in the rear end of the material propelling mechanism is located over an inlet of the paving hopper. The discharging port of the mixture stirring device is a lengthened discharging port. The paving quality is good after construction is conducted one time, construction operation efficiency is high, so that a construction period is greatly shortened, and the machine issuitable for being implemented and popularized.

The invention belongs to the technical field of wiring terminal automatic production, and particularly relates to a data transmission wiring terminal contact piece bending device and method, and the device comprises a bending support, a bending pressing assembly, a bending assembly, and a bending positioning assembly. The bending support is arranged at the bottom of the top of the third conveyingsupport, the bending pressing assembly is located at the rear portion of the bending support, and the bending pressing assembly is used for pressing and fixing the shell wiring pressing ring assembly.The bending assembly is located at the front part of the bending support and is used for bending the contact pieces on the wiring group; the bending positioning assembly is located at the bottom of the bending support and used for bending and positioning the bent contact piece. The bending device has the advantage that the bending precision and the bending efficiency of the contact pieces on thewiring group are improved.

The invention provides an active anti-collision laser cutting device. The active anti-collision laser cutting device comprises a laser cutting head and a controller capable of controlling the laser cutting head to move, and further comprises a side collision sensing structure and a capacitive sensing circuit which are arranged on the laser cutting head. The side collision sensing structure is connected with the capacitive sensing circuit. When a plate upwarping part exists on the side face of the laser cutting head, the outer surface of the side collision sensing structure and the plate upwarping part can form a first capacitor. The capacitance value of the first capacitor is matched with a first distance between the side face of the laser cutting head and the plate upwarping part. The capacitive sensing circuit is connected with the side collision sensing structure and used for sensing capacitance value information of the first capacitor. The capacitive sensing circuit is connected with the controller to feed the capacitance value information of the first capacitor back to the controller.

The invention provides an automatic transfer device of hard alloy blades. The automatic transfer device comprises a first lead screw lifter, a second lead screw lifter, a first laser range finder, a second laser range finder, a vacuum chuck, an electromagnetic chuck, a controller, a piling car, a collecting car, a distance sensor, a motor, guide rails and a guide rail frame. The first lead screw lifter and the second lead screw lifter are mounted on the guide rail frame. The first laser range finder is connected with the electromagnetic chuck. The electromagnetic chuck is connected with the first lead screw lifter. The second laser range finder is connected with the vacuum chuck. The vacuum chuck is connected with the second lead screw lifter. The piling car, the collecting car and a collector can move on the guide rails. The controller, the distance sensor and the motor are mounted on the guide rail frame. According to the automatic transfer device, manual labor is replaced, and the production cost is reduced; and the blade transfer efficiency is high, the product percent of pass is improved, and the automatic transfer device is suitable for transfer of the hard alloy blades of various types.

The invention discloses a sales rack for electric vehicle accessories. The invention relates to the technical field of electric vehicle accessories. The sales rack comprises a display rack, and fixingrods are symmetrically arranged at the two ends of the display rack. A transmission belt is arranged at the end, away from the display rack, of each fixing rod. A driving wheel is arranged on the inner side of the top of each transmission belt, a driven wheel is arranged on the inner side of the bottom of each transmission belt, stand columns are arranged at the two ends of the driving wheel andthe two ends of the driven wheel, the driving wheels and the driven wheels are located in the stand columns, synchronous motors are fixedly arranged at the positions, corresponding to the driving wheels, of the outer sides of the stand columns, and balancing weights are arranged at the bottom of the display rack. According to the invention, the transmission belts are arranged, the display rack isconnected between the transmission belts through the fixing rods, so that the display rack can be driven to move downwards, the display rack located at the top can descend gradually, so the display rack can be taken by a worker conveniently, the balancing weights play a role in stabilizing the balance of the display rack, and the situation that the display rack inclines when rotating along with the transmission belts, and consequently accessories fall off is avoided.

The invention discloses a buffer and limiting mechanism of a plastic pulling and blowing machine. The buffer and limiting mechanism comprises the structure that a front mold plate, a middle mold plateand a rear mold plate are arranged in a rack; molds are arranged in the front mold plate and the middle mold plate; bottom molds are arranged below the molds; a mold opening / closure mechanism is arranged between the middle mold plate and the rear mold plate; a bracket and a bottle push cylinder are arranged on the middle mold plate; a fixing plate is arranged on the bracket; a sealing cylinder ismounted below the fixing plate, and is connected with a sealing blowing joint; a supporting rod is arranged on the fixing plate; a supporting plate is arranged on the supporting rod; a drawing cylinder is arranged on the supporting plate, and is connected with a mounting frame; a drawing rod is mounted below the mounting frame; the bottle push cylinder is connected with a bottle push plate. The buffer and limiting mechanism is characterized in that a buffer spring is arranged on the drawing rod; a fixing screw nut is arranged below the buffer spring; a buffer sleeve is arranged on the outer wall of the drawing rod, a bottom mold cylinder and bottom mold limiting blocks are arranged on the inner wall of the front mold plate, the bottom mold cylinder is connected with bottom mold mounting plates, the bottom molds are mounted on the bottom mold mounting plates, five-claw bottle bottoms are arranged in the bottom molds, the bottom mold limiting blocks are positioned on two sides of the bottom mold cylinder, the upper ends of the bottom mold limiting blocks are 10-30 mm higher than the bottom mold cylinder, and a hand pinching prevention sensor is arranged on the inner wall of the rack.

The invention discloses an adjustable containing support for bearing machining. The adjustable containing support comprises a base and a supporting plate, sliding holes are formed in the surface of the supporting plate, sliding rods are fixedly connected to the two sides of the top of the base, the tops of the sliding rods penetrate the sliding holes and extend to the exterior of the supporting plate, vertical plates are fixedly connected to the two sides of the top of the base, connecting plates are arranged in inner cavities of the vertical plates, and pull rods are fixedly connected to thesides, far away from the supporting plate, of the connecting plates. The adjustable containing support is provided with the sliding holes, the sliding rods, the vertical plates, the connecting plates,the pull rods, springs, wedge blocks, supporting blocks, sliding grooves and sliding blocks to be in cooperation, and the problem that an existing containing support for bearing machining cannot be adjusted is solved; and the adjustable containing support for bearing machining has the advantage of being adjustable, the working efficiency of a worker is improved, the working strength of the workeris reduced, use is convenient, operation is simple, use by people is facilitated, and the containing support is worthy of popularization.

The invention discloses a ball-roller mixed rolling positive pressure heavy-load guide rail pair. The guide rail pair comprises a guide rail (1) and a sliding block (2) arranged on the guide rail (1);the two sides of the guide rail (1) are provided with rolling driving surfaces correspondingly to be matched with balls (3); the top surface of the guide rails (1) is a main moving driving surface which bears the positive pressure of a moving heavy-load object and is provided with a row of large rollers (4); two returning devices (5) are arranged at the left end and the right end of the sliding block (2) correspondingly, the sliding block (2) and the returning devices (5) are used for forming two rows of ball circulation loops allowing the balls (3) to circularly move, and the sliding block (2) and the returning devices (5) are used for forming a row of roller circulation loop allowing the large rollers (4) to circularly move. According to the guide rail pair, the bearing capacity of a linear guide rail is improved, fluctuation vibration of the rolling resistance is reduced to the maximum degree, so that the friction noise of the linear guide rail is reduced, smooth and stable movement is achieved, and the movement precision and the use efficiency of the linear guide rail are improved to a new level.