37results about How to "Avoid following rotation" patented technology

The invention discloses a lifting self-closing hinge for a high-sealing door. The lifting self-closing hinge comprises a fixed part and a rotary part, wherein the fixed part comprises a fixed seat plate and a protruded base which is protruded on the front surface of the fixed seat plate; a screw hole is formed in the top surface of the perpendicular front surface of the protruded base in a sunken mode; the rotary part comprises a rotary base; a fixed rod is fixedly arranged on the bottom of the rotary base; the fixed rod is provided with an extending-out part which downwards extends out of the bottom surface of the rotary base; the extending-out part is provided with an outer threaded section; and the outer threaded section is in screw joint to a screw hole. The lifting self-closing hinge has the advantages that: the protruded base is arranged on the front surface of the fixed seat plate of the fixed part in the protruded mode, the rotary base is positioned on the protruded base, and the threaded section is in screw joint fit to the screw hole, so that the hinge can be designed to be applied to a high-sealing type protruded door or a flat door.

The invention discloses a transport protective device for transformer sale, and belongs to the field of transformer transport protection. The transport protective device for transformer sale comprisesa lifting outer frame, the interior of the lifting outer frame is provided with a supporting base, and four storage pipes are fixedly installed on the top wall of the interior of the lifting outer frame; and the interior of each storage pipe is slidably connected with two pistons, the top of the upper piston is rotationally connected with an adjusting rod, the top end of the adjusting rod penetrates through and extends to the top of the lifting outer frame, the outer side of the adjusting rod is in threaded connection with the lifting outer frame, the lower piston is fixedly connected with avibration reduction rod, and the bottom end of the vibration reduction rod extends to the bottom end of the storage pipe. According to the transport protective device for transformer sale, all-aroundprotection can be conducted aiming at shaking and vibrating generated in the transformer transporting and lifting processes, influence of vibration on a transformer is eliminated, in addition, a usercan conveniently adjust the vibration reduction amplitude range and the vibration reduction effect according to the size of the transformer, and the application range is wider.

The invention discloses a spiral core-pulling mold for a transmission sleeve. The die comprises an upper die assembly and a lower die assembly, the upper die assembly is provided with a movable die plate, the lower die assembly is provided with a fixed die plate, the movable die plate is provided with an upper die core, the fixed die plate is provided with a lower die core and a lower die insert,a threaded rod is further arranged in the lower die assembly and provided with an upper external thread, and the lower die insert is provided with a through hole; the threaded rod penetrates through the through hole; and a cooling water channel is formed in the threaded rod, a water inlet and a water outlet are formed in the side wall of the threaded rod, and a water conveying component is arranged in the lower die assembly and communicated with the water inlet and the water outlet. The lower die assembly is provided with a driving mechanism; and the lower die assembly comprises an ejector block, the ejector block is provided with an ejector sleeve, and the ejector sleeve sleeves the outer wall of the threaded rod. The spiral core-pulling mold has the following advantages and effects thatthe scheme utilizes a new mechanical structure, and has the effects of rapid molding and high precision.

The invention discloses a drilling machine provided with a scanning mirror for positioning. The drilling machine comprises a fixing part, wherein an adjusting part is arranged on the fixing part, a clamping part is arranged on the adjusting part, a second hydraulic cylinder is arranged on the adjusting part, an output shaft of the second hydraulic cylinder is connected with a workpiece in a fastened mode, a positioning camera is arranged on the workpiece, and a placing table is arranged on the fixing part; and the workpiece comprises a fixing shell, a motor is arranged in the fixing shell, an output shaft of the motor is connected with a first gear in a fastened mode, a second gear is rotationally arranged on the fixing shell, and a transmission part is rotationally arranged on the fixing shell. According to the drilling machine, the positioning camera and a calibrator are used for calibrating and positioning the zero position, the positioning camera scans the coordinates of the workpiece working on a workbench, so that the machining efficiency is improved, and the problem that the traditional manual zero calibration is slow is solved; and a fixing plate can ascend and descend, so that when a through hole is machined, the machining procedures are reduced, the metal workpiece does not need to be adjusted for the second time, and the problems that the traditional through hole machining cannot be completed at a time, and the hole penetration can be completed only by adjusting the workpiece for secondary machining are solved.

The invention relates to the technical field of geological survey, in particular to a rock hardness detection device based on geological exploration. The device comprises a box body, a servo motor isfixedly installed at one end of the bottom of an inner cavity of the box body, a driving gear is fixedly installed on an output shaft of the servo motor, and a driven gear is engaged with the top of the driving gear; a positive and negative threaded rod is fixedly mounted on the inner side of the driven gear, and the outer side of the positive and negative threaded rod is in threaded connection with a threaded pipe; through the arrangement of the box body, the servo motor, the driving gear, the driven gear, the positive and negative threaded rods, the threaded pipe, a support plate and a protection frame, the problems that the existing rock hardness detection device does not have a protection function, and the whole process is directly exposed outside when the traditional rock hardness detection device detects the rock hardness, during detection, rock fragments are easily and directly sputtered to the body of a worker, so that the body of the worker is damaged are solved.

The invention relates to the technical field of grinding wheel equipment, and discloses a grinding wheel safe installation and fixing mechanism. The grinding wheel safe installation and fixing mechanism comprises a grinding wheel machine shell, wherein a bearing is fixedly installed in the grinding wheel machine shell, a power output shaft is fixedly installed in the bearing, a clamping seat is fixedly connected to the position, located on the left side of the bearing, of the side wall of the inner cavity of the grinding wheel machine shell, a connecting shaft is fixedly connected to one end of the power output shaft, a grinding wheel is movably installed on the outer surface of the connecting shaft in a sleeving mode, and a clamping groove is formed in the inner side surface of the grinding wheel. According to the grinding wheel safe installation and fixing mechanism, a pressing rod is arranged on a threaded shaft, through the matching of a first hinge rod, a second hinge rod, a clamping rod and a clamping seat, the power output shaft can be fixed in the process of tightening a nut to fix the grinding wheel, thus the situation that the power output shaft is prone to following rotating in the tightening process of the nut is prevented, and after the nut is tightened, the free state of the power output shaft can be ensured.

The invention relates to the technical field of packaging films, and provides a preparation device of a fruity beverage packaging film. The preparation device comprises a screw rod, the outer wall of the screw rod is movably connected with a conveying pipe, the top of the screw rod is fixedly connected with a rotating shaft, the left side and the right side of the rotating shaft are fixedly connected with transverse frames, the ends, away from the rotating shaft, of the transverse frames are fixedly connected with limiting plates, and the outer walls of the transverse frames are slidably connected with an unfolding frame. According to the fruity beverage packaging film and a preparation process thereof, a connecting plate slides downwards due to gravity and drives an arc block to move downwards, reset springs are compressed due to the fact that extrusion blocks are extruded at the beginning, when the connecting plate drives the arc block to move downwards, the arc block does not extrude the extrusion blocks any more, the extrusion blocks are rebounded by the reset springs, so that the extrusion blocks drive push rods to move, the resistance of rheostats is increased by means of the push rods , so that the rotation speed of the screw rod is reduced, the feeding speed of rotation of the screw rod is maintained, and the situation that the raw material melting speed fails to follow the feeding speed is avoided.

The invention discloses welding equipment and a welding method of a seamless steel tube. The welding equipment comprises a supporting seat, wherein positioning plates are fixedly installed on the twosides of the top of the supporting seat, fixed sleeves are fixedly installed in the positioning plates, adjusting rods are in threaded connection with the interiors of the fixed sleeves, clamping blocks are rotationally installed at one end of each of the adjusting rods, the other ends of the adjusting rods extend out of the fixed sleeves, and a fixed plate is fixedly installed on the front side of the middle end of the top of the supporting seat. One end of the steel tube can be clamped and fixed by arranging the adjusting rods and the clamping blocks, the clamping parts on the inner sides ofthe clamping blocks are arranged to be in an arc shape to be exactly matched with the shape of the steel tube, the stability after clamping can be guaranteed, meanwhile, two clamping sleeves are arranged on the side face of the supporting seat, and the front end of the clamped steel tube can be fixed; and the clamping effect is good, it is guaranteed that shaking cannot be generated during welding, the clamping distance can be adjusted according to the size of the steel tube, and the welding quality is improved.

The invention provides a waste plastic recycling equipment for cable production, which includes a fixed outer frame, a cable conveying positioning frame structure, an adjustable cable top-tightening fixing frame structure, an adjustable cable peeling frame structure, a longitudinal fixing plate, and a separating scraper , material guide plate, crushing motor, crushing knife, export frame, protective door, material skin storage chamber, wire core storage chamber, guide cover and wire core rolling frame structure, and the cable conveying positioning frame structure is installed on the fixed outer frame The upper left side of the upper part; the adjustable cable top fastening frame structure is installed on the upper part of the cable conveying positioning frame structure; the adjustable cable peeling frame structure is installed on the upper right side of the cable conveying positioning frame structure. The crushing teeth of the present invention are respectively welded on the outer sides of the crushing teeth, which is beneficial to use the crushing motor to drive the crushing teeth to rotate during use, thereby facilitating the extrusion function of the wire core passing through the inner side of the crushing teeth, thereby facilitating the gathering The cores that are together are separated.

The invention discloses a pneumatic and stable semiconductor wafer cutting device based on the principle of magnetic pole pressurization. In the middle of the surface of the base, the top and rear ends of the fixed base are provided with a gantry guide frame, and the bottom of the mobile platform is installed on the upper end of the gantry guide frame by means of snapping. The cutter of the present invention ensures the angle of the gravity cooler through the weight box, and the gas is pressurized and output by the rotary pressure plate, and the bottom of the cutting piece is aerated, so as to solve the problem that the chip raw material is cooled during the cutting process. The problem of water peeling, and the water cooling head is designed to be cooled on both sides, which effectively avoids the situation that the chip raw material is washed away by the cooling liquid, and improves the integrity of the wafer after cutting.

The invention provides a multifunctional epoxypropane treatment device, which comprises a treatment shell, a limiting frame, a sealing plate, a side bracket, anti-skid supporting legs, an adjustable jacking frame structure, a water liquid filtering and supplying frame structure, a longitudinal guide pipe, a transverse guide pipe, a spraying head, a transverse insertion frame, a treatment frame structure convenient to disassemble, a gas auxiliary guide-out device, a guide-in fan, a guide-in pipe and a connecting pipe, wherein the limiting frame is welded at the lower part of the treatment shell; the side edge brackets are welded at four corners of the lower part of the treatment shell; the anti-skid supporting legs are glued to the lower parts of the side edge brackets; the adjustable jacking frame structure is mounted on the inner side of the side bracket; and the water liquid filtering and supplying frame structure is mounted at the lower part of the right side of the treatment shell. An exhaust fan is arranged on the inner side of a conveying pipe, so that gas can be discharged outwards; and connecting bolts penetrate through the connecting holes and are in threaded connection with the treatment shell, so that an adsorption plate and a filter plate can be conveniently pulled out of the transverse insertion frame for maintenance.

An embodiment of the invention discloses a nut tightening machine comprising a machine body, a power system and a clamping mechanism. The power system and the clamping mechanism are arranged on the machine body, and the clamping mechanism is used for clamping an output shaft matched with a nut to be tightened. The power system comprises a shell arranged on the machine body, a driving head rotatably arranged on the shell, a sleeve matched with the to-be-tightened nut, and a first driving unit arranged on the shell and used for driving the driving head to rotate. By the nut tightening machine, the nut can be tightened without being knocked, so that the problem that the appearance of the round nut is damaged during assembly is avoided completely by the assembly form. The output shaft does not need to be fixed manually, labor intensity of workers is lowered substantially, and production efficiency is improved.

The invention relates to the technical field of biology, and discloses a device for effectively cleaning test tubes with different calibers. The device comprises a base, wherein the inner bottom wall of the base is rotatably connected with a brush rod, the top of the brush rod is sleeved with a test tube, the outer side of the brush rod is movably connected with bristles, the two sides of the bottom of the brush rod are movably connected with limiting pieces, rubber is fixedly connected to the positions, close to the two sides of the brush rod, of the inner bottom wall of the base, and evenly-distributed contacts are fixedly connected to the bottoms of the rubber. According to the device for effectively cleaning the test tubes with different calibers, through cooperative use of a magnetostrictive material and a telescopic piece, when the calibers inserted into the test tubes are larger, the circuit resistance after the contacts are in contact with a winding coil is smaller, the circuit voltage is larger, and the electrified magnetism of a second electromagnet is larger; and therefore, the effect of driving the magnetostrictive material to move farther is achieved, the purpose of pushing the bristles to move farther outwards is effectively achieved, the cleaning diameter of the brush rod is increased, and the effect of cleaning the test tubes with different calibers is achieved.

The invention discloses a portable bearing capacity detection device for a highway bridge and a use method of the portable bearing capacity detection device. The portable bearing capacity detection device comprises a mounting bedplate and a fixed frame arranged above the mounting bedplate, the placing box is arranged above the fixing frame and fixedly connected with the placing box through bolts, and a detection instrument is arranged in the placing box; the auxiliary sleeves are arranged below the mounting table plate and are fixedly connected with the mounting table plate through bolts, and the number of the auxiliary sleeves is four; the cleaning box is arranged below the mounting table plate, lifting frames are mounted on the two sides of the cleaning box, the cleaning box is fixedly connected with the lifting frames through bolts, the lifting frames are fixedly connected with the mounting table plate through bolts, and a top opening is formed in the upper portion of the cleaning box. According to the highway bridge detection device, the effect that the highway bridge detection device can clean dust particles covering the detection position of a highway bridge is achieved, and therefore the problem that the detection device is inaccurate in detection is effectively avoided.

The invention provides a house building construction multifunctional lifting platform with a good stabilizing effect. The house building construction multifunctional lifting platform comprises a transverse bottom plate, and support structures convenient to disassemble and assemble are installed on the left side and the right side of the upper portion of the transverse bottom plate; an L-shaped frame is installed on the upper portion of the support structure convenient to disassemble and assemble. A top fixing frame is installed on the upper portion of the L-shaped frame through a bolt. A rain shade is installed on the upper portion of the top fixing frame through bolts. A driving motor is installed on the lower middle portion of the top fixing frame through a bolt. And an output shaft on the front side of the driving motor is in key connection with a winding roller. The upper portion of the movable plate is in shaft connection with a metal protection plate, the metal protection plate and the movable plate can be conveniently used for protecting the front side and the rear side of the lifting plate during use, then workers or materials are prevented from falling off from the lifting plate during use, the movable plate and the metal protection plate are rotated into the side storage frame when the lifting plate is not used, and the lifting plate is convenient to use. And the occupied space can be saved.

The invention provides a civil engineering building construction safety construction device which comprises a supporting pipe, an adjustable supporting frame structure, a fine adjustment support structure, an adjustable bottom frame structure, a sealing ring, a fixing nut, a fixing bolt, an adjusting insertion pipe, an adjusting insertion hole, a mounting plate, a total station body and a portable structure. An adjustable support frame structure is mounted at the lower part of the outer side of the support pipe; fine adjustment support structures are mounted on the front side and the rear side of the adjustable supporting frame structure; an adjustable underframe structure is mounted at the lower part of the inner side of the supporting pipe; the upper part of the supporting pipe is glued with a sealing ring; a fixing nut is embedded in the upper portion of the right side of the supporting pipe. The bottom wheels are arranged on the inner sides of the supporting pipes, the bottom wheels are in threaded connection to the lower portions of the supporting pipes through upper side threaded bases when not used, the bottom wheels can be stored conveniently, and on the contrary, the bottom wheels can make contact with the ground when installed on the outer sides, and the device is moved.

The invention discloses a seamless steel pipe welding equipment and a welding method thereof, comprising a support seat, a positioning plate is fixedly installed on both sides of the top of the support seat, and a fixed sleeve is fixedly installed inside the positioning plate, so that The internal thread of the fixed sleeve is connected with an adjustment rod, one end of the adjustment rod is rotated and installed with a clamping block, the other end of the adjustment rod extends to the outside of the fixed sleeve, and the front side of the middle end of the top of the support seat is fixedly installed with a fixed plate. In the present invention, one end of the steel pipe can be clamped and fixed by setting the adjusting rod and the clamping block, and the clamping part inside the clamping block is set in an arc shape which coincides with the shape of the steel pipe, which can ensure the stability after clamping, and at the same time Two clamping sleeves are set on the side of the support seat, which can fix the front end of the steel pipe after clamping. Not only the clamping effect is good, but also to ensure that there will be no shaking during welding, and the clamping distance can be adjusted according to the size of the steel pipe , Improve welding quality.

The invention discloses a full-fraction catalytic gasoline selective hydrodesulfurization device, and relates to the technical field of desulfurization processing. The full-fraction catalytic gasoline selective hydrodesulfurization device comprises a base; desulfurizers are fixedly connected to the left side and the right side of the top face of the base; connecting pipes are fixedly connected to the top faces of the two desulfurizers, a classification box is fixedly connected to the upper ends of the two connecting pipes, a feeding pipe is fixedly connected to the top face of the classification box, and a motor is fixedly connected to the left side of the classification box; and a screening device is arranged in the classification box, and a feeding device is arranged in the classification box. Through the arrangement of the screening device, a filter frame vibrates to filter raw materials, the raw materials with fine texture are discharged into a desulfurizer on the left side through the connecting pipe, and rough raw materials are left in the filter frame, so that the classification of the raw materials is completed, and different hydrogen is added for the classified raw materials to desulfurize; therefore, the utilization rate of the raw materials is increased, and the environment-friendly and energy-saving effects of the device are improved due to waste of the raw materials.

The invention discloses an aviation obstruction beacon and a remote monitoring system thereof, and relates to the technical field of aviation obstruction beacons, the obstruction beacon comprises a base, a lampshade is rotatably installed in the middle of the base, a light source assembly is arranged in the lampshade, and a first inlet and outlet and a second inlet and outlet are formed in the two sides of the upper end of the base respectively; an air blowing pipe is installed at the inlet and outlet in a sliding fit mode, a fan is rotatably installed at the bottom in the air blowing pipe, an air inlet is formed in the bottom of the air blowing pipe, and an air outlet is formed in the side wall, facing the lampshade, of the air blowing pipe. Through the telescopic structure, the air blowing pipe and the sweeping structure can be retracted into the base when working is not needed, and the situation that the air blowing pipe and the sweeping structure are exposed outside for a long time and damaged due to environmental influence is avoided; meanwhile, the retracted structure does not become a shielding object, it is ensured that lamplight can be transmitted without obstacles, and the aviation safety standard is met.

This utility model discloses a fall protection device for a bay window in building construction, comprising a protective rod: sleeves are fitted on both sides of the protective rod surface; first threaded pins are threaded through both ends of the top front side of each sleeve, extending to the bottom of the sleeve and threadedly connected to it; an inner support assembly is provided on the rear side of the sleeve, including a support plate welded to the rear side of the sleeve; threaded sleeves are welded to the top and bottom of the support plate; a second threaded pin is threadedly connected to the inner cavity of the threaded sleeve; and a displacement abutment is fixedly connected to one end of the second threaded pin. This utility model, through the combined use of the sleeves and the clamping assembly, forms an inner support clamp for the bay window location, and simultaneously, with the cooperation of the clamping assembly, forms a longitudinal clamp for the wall at the bay window location, thereby installing and fixing the protective rod, achieving both horizontal and longitudinal support and fixation while avoiding drilling and damage to the wall.

The invention provides a controllable guiding sheath tube capable of being inserted stably, and relates to the technical field of medical instruments, the controllable guiding sheath tube comprises a main body, the main body is of a cylindrical structure, and an inner groove is formed in the side wall of the main body; an open groove is formed in the side end of the inner groove, and side grooves outside the inner groove are formed in the two sides of the main body; the sliding plate is of a conical structure, and the sliding plate is installed on the outer side of the main body in a sliding mode; and the vertical plate is mounted at the bottom of the side end of the inner pipe in the main body. The sliding plate is placed at the part in contact with the skin of a patient, so that when the guiding sheath tube is inserted, the movement of the main body is guided, the main body stably moves during insertion, discomfort of the patient caused by shaking is prevented, and meanwhile, the situation that the hand is in contact with the outer side of the main body to cause bacterial infection is prevented; the problem that when an existing guiding sheathing canal is used, the portion, making contact with a patient, of the guiding sheathing canal shakes, and discomfort of the patient is likely to be caused is solved.

The invention discloses a punching device for an accounting book. The punching device comprises a base, a stand column, a drilling machine and a control switch, wherein the stand column is perpendicularly mounted on the upper part of the base; the upper end of the stand column is equipped with a spindle box; a worm is mounted inside the spindle box; one end side of the worm is connected with a pressing rod; the end side of the spindle box is equipped with a spindle; the position, which corresponds to the worm, outside the spindle is equipped with a gear ring in a surrounding mode; a blocking plate is arranged inside the spindle box; the gear ring is positioned between groups of blocking plates; the spindle is internally hollow; the drilling machine is fixedly mounted at the lower end inside the spindle; a limiting ring is arranged on the outer surface of the lower part of the spindle; the limiting ring is positioned on the outer part of the spindle box; the lower part of the limiting ring is equipped with four groups of extrusion springs at equal angles; the lower ends of the extrusion springs are connected with slide rings; the lower ends of the slide rings are equipped with fourgroups of ejector rods at equal angles; the bottom ends of the ejector rods are connected with a base plate; and the position, which corresponds to the rotary shaft of the drilling machine, of the middle part of the base plate is provided with a hole slot.

The invention relates to the technical field of wind power generation, in particular to a multi-directional microminiature piezoelectric wind energy collector which comprises a collecting body and a collecting body installed at the top of the collecting body, the collecting body comprises a base plate, a middle cylinder is arranged at the top of the base plate, a low rod is arranged in the middle of the bottom in the middle cylinder, and a piezoelectric module is fixed to the top of the low rod. A battery is arranged at the bottom in the middle cylinder, the piezoelectric module is electrically connected with the battery through a wire, a partition plate is arranged above the battery in the middle cylinder, a shaft groove is formed in the middle of the partition plate, the collecting body comprises a top cylinder located at the top of the middle cylinder, a through groove is formed in the top cylinder and is a groove of a partial inverted cone structure, and a top body is connected into the through groove through a support. The top body is of an inverted cone structure, the shaft groove is rotationally connected with an intermediate shaft, the intermediate shaft is symmetrically provided with a plurality of fan blades, and the bottom of the intermediate shaft is in threaded connection with a pressing rod. The device has the advantages that by arranging the piezoelectric module, collected wind energy is converted into electric energy to be stored.

The invention aims to provide a wire dividing mechanism, four-wire winding T2 equipment and a wire winding method, wherein the wire dividing mechanism is neat in stranded wires, accurate in segmentation, high in efficiency, low in labor cost and good in thick wire diameter winding effect. The wire dividing mechanism comprises a fixing base, a clamping assembly and a wire dividing assembly, whereinthe wire dividing assembly comprises a first air cylinder, a first linear sliding rail, a first sliding block and a pair of brush heads, the first air cylinder and the first linear sliding rail are fixed on the fixing base, the first sliding block is fixedly connected with a piston rod of the first air cylinder, the first sliding block is in sliding fit with the first linear sliding rail, the pair of brush heads are respectively fixed on two sides of the first sliding block, and bristles are arranged oppositely. The four-wire winding T2 equipment comprises the wire dividing mechanism. The wire winding method is implemented based on the four-wire winding T2 equipment. The wire dividing mechanism, the four-wire winding T2 equipment and the wire winding method are applied to the technical field of network transformer production.

The invention provides a hanging basket bottom support system, which includes a bottom bracket, a positioning storage frame, a bottom storage frame, a positioning rod, a buffer support frame structure, an upper side positioning lifting frame structure, a side adjustable limit frame structure, bearings, L-shaped positioning plate, reinforced ventilation frame structure, winding frame, winding roller, rotating handle, guiding frame and fixed rope, the positioning storage frame is embedded in the upper part of the bottom bracket; the bottom storage frame is embedded in the bottom bracket The left and right sides of the lower part; the positioning rod is plugged into the inner side of the bottom storage frame. The shock-absorbing spring of the present invention is socketed in the middle position of the outer side of the I-shaped rubber shock-absorbing mount, and uses the shock-absorbing spring and the I-shaped rubber shock-absorbing mount to play a shock-absorbing and buffering function; the threaded rod is threaded on the inner side of the threaded hole , it is beneficial to adjust the position of the L-shaped positioning plate in the positioning storage frame, thereby facilitating the positioning function for the objects in the positioning storage frame.

The invention provides a polish rod sealer sealing slip piston sealing device and method.The sealing device comprises a sealer shell, the sealer shell perpendicularly penetrates through a polish rod, sealing slip pistons are symmetrically arranged in the sealer shell along the polish rod, each sealing slip piston comprises a piston and a sealing slip, one end of each piston is fixedly connected with the corresponding sealing slip, and the other end of each piston is fixedly connected with the corresponding sealing slip. An eccentric hole is formed in the other end face of the piston, a metal shaft is eccentrically hung in the eccentric hole, and a piston guide mechanism is arranged between the piston and the sealing slip. The metal shaft and the sealing slip piston are in eccentric positioning connection, so that the sealing slip piston is prevented from rotating along with rotation of the metal shaft. The guide conical column and the guide groove are adopted, the copper pressing pieces are arranged on the upper face and the lower face of the sealing slip and connected through the fixing screw rod, after the sealing face and a polished rod are matched for sealing and abraded, the copper pressing pieces can be driven by the fixing screw rod to retreat along the guide groove through pressure, and therefore the compensation amount is large, and in the pushing process of a piston of the sealing slip, stress expansion is even, and the sealing effect is better.

The invention relates to the technical field of grinding wheel equipment, and discloses a grinding wheel safety installation and fixing mechanism, which includes a grinding machine shell, and a bearing is fixedly installed inside the grinding wheel shell, and a power output shaft is fixedly installed inside the bearing. The side wall of the inner cavity of the grinder shell is located on the left side of the bearing and is fixedly connected with a card seat. One end of the power output shaft is fixedly connected with a connecting shaft. The outer surface of the connecting shaft is movably fitted with a grinding wheel. The inner surface of the grinding wheel There are card slots. The grinding wheel is safely installed and fixed. By setting the pressing rod at the threaded shaft and the cooperation of the first hinged rod, the second hinged rod, the clamping rod and the clamping seat, the nut is tightened to fix the grinding wheel. It can ensure that the power output shaft is fixed, thereby preventing the power output shaft from easily following rotation during the screwing process of the nut, and can ensure the free state of the power output shaft after the nut is tightened.

The invention belongs to the field of automobile maintenance, and particularly relates to an automobile mechanical tire changing machine which comprises a bottom plate, an adjusting assembly is added on the basis of the bottom plate, two hydraulic supporting rods are used in cooperation, the bottom of an automobile can be supported more stably, the disassembly and replacement difficulty of tires can be reduced, and the replacement efficiency of workers is improved. On the basis, a height adjusting assembly is additionally arranged, a first supporting rod is driven to slide in a second supporting rod under the matching action of a first bevel gear, a second bevel gear and a screw rod by manually rotating an adjusting handle to rotate, adjustment in the height direction is conducted, meanwhile, the adjusting assembly is matched, and a sliding block is controlled to slide in a sliding groove by rotating an adjusting part; and meanwhile, the automobile hub is fixed through the L-shaped support, and the situation that the wheel rotates along with the automobile hub when the bolt on the automobile hub is detached can be avoided.

The invention provides convenient-to-move fitness equipment for communities, which comprises a longitudinal supporting pipe, a longitudinal supporting frame, adjusting insertion holes, an adjusting bolt, a transverse top frame, an adjustable arm strength exercising frame structure, a rotatable leg exercising frame structure, an adjustable bottom extension frame structure, an adjustable movable fixing frame structure, an L-shaped support, a shaft rod, a rotary disc, a rotary handle, a storage basket and a protective cover. The adjusting insertion holes are sequentially formed in the front sideof the longitudinal supporting frame from top to bottom. The adjusting bolt penetrates through the longitudinal supporting pipe and is in threaded connection with the adjusting insertion holes in thelongitudinal supporting frame; The transverse top frame is welded at the upper end of the longitudinal supporting frame. Moving wheels are in shaft connection with the lower portions of the inner sides of wheel carriers, bottom supporting legs can be folded upwards when the equipment is not used, the equipment is pushed to rotate on the ground through the moving wheels by means of contact betweenthe moving wheels and the ground, and therefore the equipment can be moved conveniently.