147results about How to "Fixed way is firm" patented technology

The invention discloses an unmanned aerial vehicle for plant protection. The unmanned aerial vehicle comprises a rack, wherein a center plate is firmly connected to the top of the rack; multiple machine arms are uniformly distributed on sides of the center plate; a rotor driven by a motor is disposed on the front end of each machine arm; a water tank is firmly connected to the bottom of the center plate; an outlet of the water tank is connected to an inlet of a water pump by a pipeline; the water pump is fixed on a horizontal rod which is located at the middle part of the rack; spraying rods which extend to the left side and the right side are disposed at the middle part of the rack; a spraying nozzle is disposed on each spraying rod; an outlet of the water pump communicates with each spraying nozzle by multi-way joints and pipelines; landing rods are disposed on the left side and the right side of the bottom of the rack respectively; a storage battery is fixed on the top face of the center plate; and the storage battery is electrically connected to the water pump and the motor which drives the rotors. The center plate and the water tank sandwich the single rod for integral fastening. The unmanned aerial vehicle disclosed by the invention has the advantages that the structure is compact and firm; because of a damping sponge cushion, the spraying rods are prevented from shaking and then causing unstable flight of the whole machine, so that flight stability can be ensured.

The invention relates to the field of cylinder decoration, in particular to a cylinder decoration strip assembly. The cylinder decoration strip assembly comprises clamping and connecting elements, wherein the clamping and connecting elements are arranged at intervals in the circumferential direction of a cylinder; a clamping and connecting part used for clamping a decoration plate is arranged on each clamping and connecting element; the clamping and connecting elements fixedly suspend and extend out of the cylinder and are fixed outside the cylinder in a welding or screw connecting way; and then, the decoration plate is clamped and connected into the clamping and connecting element, and the fixation of the decoration plate can be completed. The welding or screw connecting and fixing mode is stable and firm, so that the safety and the reliability of the decoration plate can be enhanced.

The invention relates to a sick pig blood taking device with a rotary fixing function for animal husbandry and veterinary medicine, and aims to solve the problem that it is inconvenient for a veterinarian to take blood through an injector due to the fact that piglets are not easy to fix during blood taking. The sick pig blood taking device with a rotary fixing function for animal husbandry and veterinary is characterized in that a placing plate is horizontally arranged in the middle of a frame body, a waist and abdomen fixing device is arranged in the center of the lower surface of the placingplate and comprises an arc-shaped bent plate and arc-shaped side plates hinged to the two sides of the arc-shaped bent plate, the inner surfaces of the arc-shaped bent plate and the arc-shaped side plates are of arc surface structures, and two circular rings are arranged in the middle sections of the outer surfaces of the arc-shaped side plates; vertical long-strip holes are formed in the positions, corresponding to the circular rings, of the side wall of the frame body, push rods are arranged in the long-strip holes, and one ends of the push rods are connected with the circular rings throughhooks; and sliding rails are arranged on the two sides of the frame body, two sets of telescopic devices are arranged on the sliding rails on the two sides, clamps are arranged at the ends of the telescopic devices, handles are arranged at the tail ends of the telescopic devices, triggers are hinged to the handles, and steel ropes on the clamps are connected with the triggers.

The invention discloses a direct-drive switched reluctance planar motor, which belongs to the field of electromechanical research. The motor is characterized in that a right lug boss 33 and a left lug boss 34 are arranged on the two sides of a rotor core 32 and matched with a rotor buckle to fix an XA-phase rotor 24, an XB-phase rotor 19, an XC-phase rotor 15, a YA-phase rotor 23, a YB-phase rotor 16 and a YC-phase rotor 26 on a rotor rack 17; the height of the rotor buckle is 0.3 to 0.5mm less than those of the right lug boss 33 and the left lug boss 34; a first right connecting plate 36, a second right connecting plate 37, a first left connecting plate 38 and a second left connecting plate 39 are arranged on the two sides of a rotor rack plate 35; on one hand, the first right connecting plate 36, the second right connecting plate 37, the first left connecting plate 38 and the second left connecting plate 39 are fixedly connected with the rotor rack plate 35; on the other hand, the connecting plates are also fixedly connected with a first straight bearing 29, a second straight bearing 2, a third straight bearing 18 and a fourth straight bearing 20; and thus the rotor rack 17 can flexibly move along a first guide shaft 4 in x direction and a second guide shaft 13 in the x direction.

The invention discloses a double-wind-wheel offshore floating type wind turbine generator. The double-wind-wheel offshore floating type wind turbine generator comprises a front wind wheel, a rear wind wheel, a rear hub, a cabin, a front hub, a tower drum, a floating body, a catenary and an anchoring device, wherein the front wind wheel is arranged in the upwind direction, the rear wind wheel is arranged in the downwind direction, the front wind wheel and the rear wind wheel are connected to the two ends of the cabin through the hubs, and the cabin, the tower drum and the floating body are sequentially connected from top to bottom; a yawing system is arranged at a flange plate between the cabin and the tower drum; blades of the front wind wheel and blades of the rear wind wheel are respectively connected to the front hub and the rear hub through flange plates; a variable pitch system is arranged at the flange plate, connected to the front hub, of each blade of the front wind wheel; a variable pitch system is arranged at the flange plate, connected to the rear hub, of each blade of the rear wind wheel; and the rear wind wheel can fully capture remaining wind energy of the front wind wheel, gradient utilization of the wind energy is achieved, the comprehensive wind energy utilization coefficient of the wind turbine generator is increased, wake flow effects are reduced, and the sea area utilization rate and the whole power generation efficiency of an offshore wind plant are improved.

The invention discloses an automatic rotation roasting machine comprising a machine frame, a driving mechanism and a motor, wherein, the machine frame is provided with a cuboid roaster, a heating component is arranged in the roaster, the top of the front side wall of the roaster is provided with a front frame board, and a plurality of openings for supporting sticks are arranged on the front frame board; the top of the back side wall of the roaster is provided with a back frame board provided with a plurality of axles, and the position of each axle is corresponding to each opening on the front frame board; the front-end axle head of each axle is provided with a cap stopper provided with a slot for positioning sticks; each axle is fixedly connected with a driving chain wheel, all driving chain wheels of axles are mutually connected by a big chain, and one of the driving chain wheels is connected with the motor by a driving mechanism. The automatic rotation roasting machine of the invention has the advantages of energy saving, environment protection, no oil smoke, flexible use, convenient operation, easy control and even food heating, and can roast different kinds of food simultaneously.

The invention discloses a refrigerator comprising a lining, an evaporator and a fixing device. The lining bounds a chamber with the front side opened. The sidewall of the chamber is provided with a fitting groove. The evaporator is arranged inside the chamber. The fixing device arranged on the lining comprises a body and a fastener; a fastening channel opened towards the sidewall of the evaporator and having a rear opening is bounded in the fastener; part of the front end of the evaporator is arranged in the fastening channel; the fastener is in fastening fit with the fitting groove. The refrigerator has the advantages that simple and fast fixation of the evaporator leads to higher assembly efficiency of the refrigerator, moderate reduction in the size of the fixing device leads to convenient and easy mounting of the fixing device, easier operations for workers and lower consumption of material for the fixing device, the appearance of the refrigerator is unaffected, and rarity of the fixing device to separate ensures fixation stability and reliability for the evaporator.

The invention discloses a fixed line feed apparatus of an ultrasonic probe in an ultrasonic wave stress measurement system. The apparatus comprises a track rack, fixing sucking discs, a probe fixing wedge, a probe fixing chamber 1, a probe fixing chamber 2 and a coupling monitor, wherein a cross section of the track rack is in a ''door'' shape; two side surfaces of the track rack along a length direction are provided with horizontal straight slots; a tapered bolt hole and a tapered bolt are arranged above the straight slots; a material which is used to form the tapered bolt hole, a material between the tapered bolt hole and the straight slots and a material below the straight slots are an elastic material; the fixing sucking discs are arranged on two ends of the track rack; the probe fixing wedge is arranged in the track rack; left and right side surfaces of the probe fixing wedge are provided with slide handles; the probe fixing chamber 1 and the probe fixing chamber 2 are fixed to an upper-left portion and an upper-right portion of the probe fixing wedge; the coupling monitor is formed by a monitoring indication lamp, a pressure sensor which is electrically connected to the monitoring indication lamp and a resistor sensor. By using the apparatus, the ultrasonic probe can be accurately positioned; a coupling state between the ultrasonic probe and a component to be measured is guaranteed to be consistent with a coupling state used during calibration; measurement precision of an ultrasonic wave detection method is increased.

The embodiment of the invention provides an automatic cat excrement cleaning device. The automatic cat excrement cleaning device comprises a ball bin assembly and a driving assembly, the ball bin assembly is configured to at least comprise three spaces, namely a working bin used for containing cat litter and allowing cats to excrete, a screening bin used for screening the cat litter and cat excrement and an excrement collecting bin used for containing the cat excrement, and a plurality of screening holes are formed in the surface, facing the circle center of the ball bin assembly, of the screening bin; the driving assembly is configured to drive the ball bin assembly to rotate; when the ball bin assembly rotates to a first position, the screening bin is located at the lowest position of the ball bin assembly, the cat litter penetrates through the screening holes to fall into the screening bin, and the cat litter is retained in the working bin due to the fact that the size of the cat litter is larger than that of the screening holes; and when the ball bin assembly rotates to a second position, the excrement collecting bin is located at the lowest position of the ball bin assembly, and cat excrement falls into the excrement collecting bin. The automatic cat excrement cleaning device is simple and compact in structure, small in size, portable, high in space utilization rate and easy to clean.

The invention discloses an electrode and a preparation method thereof, a biosensor and an enzyme biofuel cell.The electrode comprises an electrode carrier and a biological enzyme which is fixed to the electrode carrier by means of electrostatic adsorption.Through the electrode, direct electron transfer between an enzyme active center and the electrode carrier can be realized, the electrical properties of the electrode are good, and high cell power density can be obtained when the electrode is applied to the cell.

The invention discloses a laptop with a dustproof screen in the field of computers. The laptop with the dustproof screen comprises a display, a host, a keyboard and a touchmouse, wherein the display is hinged to the host; the keyboard is positioned on the back side of the upper surface of the host; the touchmouse is positioned on the front side of the keyboard; the display comprises a display screen and a frame arranged around the display screen in an enclosing manner; a vertical rotating shaft is fixed in the frame on the left side of the display screen; a transparent dustproof membrane is arranged on the rotating shaft; a kerf for the dustproof membrane to pass through is formed in the frame on the left side of the display screen; a clamping strip is fixed at the end, penetrating through the kerf, of the dustproof membrane; a clamping groove matched with the clamping strip is formed in the frame, on the right side of the display screen. The scheme is ingenious in conception, simple in structure, convenient and practical, and dust in the environment can be effectively prevented from dropping on the display screen of the laptop.

The invention discloses an offshore floating type wind turbine generator with an energy storage device, and an electric energy absorption method. The offshore floating type wind turbine generator comprises a fan, a tower drum, a box body structure and a plurality of air storage tanks, wherein the fan, the tower drum and the box body structure are sequentially connected from top to bottom, the airstorage tanks are arranged on the periphery of the box body structure at equal intervals, a compressor and a micro turbine are arranged in the box body structure, and the compressor is communicated with inlets of the air storage tanks; outlets of the air storage tanks are communicated with a working medium inlet of the micro turbine, and the air storage tanks are filled with compressed air; an anchoring support is arranged on the periphery of the box structure, the anchoring support is connected with an anchoring device through a catenary, and the anchoring device is fixed to the seabed; a balance weight is arranged in the box body structure; the electric energy input end of the compressor is connected with the electric energy output end of the wind turbine generator; and compressed air inthe air storage tanks serves as an energy storage medium, meanwhile, and also can provide buoyancy for the fan to reduce the acting force of stormy waves on the fan and keep the fan stable, and meanwhile electric energy of the wind turbine generator can be absorbed.

The invention provides a tantalum niobium alloy dental implant which comprises an artificial tooth base station portion, a main body portion and a neck connecting the artificial tooth base station portion with the main body portion. The outer surface of the main body portion is provided with an external thread contacting with alveolar bone, and multiple through holes penetrating thread ribs and parallel to the main body portion are formed in the thread ribs of the external thread at intervals; each thread rib further comprises two side faces in opposite arrangement, each side face is coated with a decomposable film, and a hyperostosis helping slow-release agent is contained in a containing cavity jointly formed by the two decomposable films and the corresponding through holes. The tantalumniobium alloy dental implant has the advantage of being good in combining with the alveolar bone and easy to mount and demount.

The invention discloses a punching device for mold production. The punching device comprises a base plate, a transverse adjusting device, a longitudinal adjusting device, a clamping device, a supporting plate, a lifting device, a mounting plate, a driving device, a cooling device and a rotating device; and the base plate is internally provided with the transverse adjusting device, the transverse adjusting device is fixedly connected with the base plate, the top of the transverse adjusting device is provided with the longitudinal adjusting device, and the longitudinal adjusting device is fixedly connected with the transverse adjusting device. According to the punching device for mold production, the transverse adjusting device and the longitudinal adjusting device can be used for processinga plurality of holes at a time, the position of a mold plate does not need to be moved again, processing time is saved, and the processing efficiency is improved; the cooling device is used for cooling a drill bit and the mold plate, and the processing precision of mold plate holes is improved; and an air cylinder is used for clamping the mold plate, the clamping method is more rapid, the mold clamping time is shortened, the processing efficiency is improved, the air cylinder achieves clamping more firmly, and accurate punching is further ensured.

Provided is a drink bottle transport system. The drink bottle transport system comprises a bottle-feeding conveyor belt, a bottle-discharge conveyor belt and a plurality of push components for connecting the bottle-feeding conveyor belt with the bottle-discharge conveyor belt. The bottle-feeding conveyor belt comprises a circular conveyor belt, an outer side conveyor belt is additionally arranged on the outer side of the circular conveyor belt, a bottle-discharge opening connected with one of the push components is formed in the inner side of the circular conveyor belt, a horizontal air blowing valve corresponding to the bottle-discharge opening is arranged in the middle of the circular conveyor belt, and a guide rod is arranged at a bottle-feeding opening of the bottle-discharge conveyor belt. A feeding device and a weighing device are further arranged between the bottle-feeding conveyor belt and the bottle-discharge conveyor belt, and a bottle body at the bottle-feeding opening is pushed to a weighing component for feeding and continues to be pushed to the bottle-discharge opening by the push components. The drink bottle transport system is comparatively simple in structure of each part and reasonable in design, prevents a drink bottle from being jammed in front of and behind the feeding device and falling down, guarantees the efficiency and the order of the whole transport process, also is favorable for completing feeding safely and stably, and improves the product qualification ratio.

The invention relates to the technical field of medical equipment, and discloses a uterus clamp. The uterus clamp comprises a pair of clamp arms which are connected mutually and crosswise through a clamp rotation shaft and clamp jaws connected to the head ends of the clamp arms, wherein each clamp jaw comprises a head end making contact with the uterus and a tail end connected with the corresponding clamp arm through a clamp jaw rotation shaft, the clamp jaw rotation shafts are parallel to the clamp rotation shaft, and the head ends can pivot relative to the clamp arms by taking the clamp jaw rotation shafts as pivot shafts. The uterus clamp can fix the relative position of the uterus in an operation to prevent the uterus from sliding.

The invention belongs to a pressure-cooker cover, and is implemented simultaneously or individually by three parts, the pressure-cooker cover, a seal ring and a support piece for fixing the seal ring, wherein the cooker cover is divided into two layers, the first layer is a cover top layer which is a circumferential wall formed by extending downward the periphery of the cover top of the cooker cover; a connecting plane is arranged at the connection between the cover top layer and a buckle teeth layer of the cooker cover; a circumferential wall formed by extending downward the periphery of the connection plane is a second buckle teeth layer; the buckle teeth layers are provided with buckle teeth for buckling the cooker body; the main body section of the seal ring is a 7-shaped ring body, one side of the ring body is designed to be a plane, and the other side is designed to be a cambered surface; the plane is adhered in the cooker cover and fixedly mounted by a plurality of T-shaped support pieces; and when the cover is closed, the cambered surface is adhered to a cooker mouth of the cooker body, which forms sealing between the cooker cover and the cooker body. The pressure-cooker cover provided by the invention has the advantages of using a small amount of material, and being firm and stable in the fixing mode, simple in structure, safe and reliable, low in manufacturing cost, low-carbon, environment-friendly and energy-saving.

The invention relates to a waterproof joint structure of a steel structure workshop. The waterproof joint structure comprises a flashing structure in the side span position. The flashing structure at least comprises angle covering plates provided with a flashing part and at least one fixed part. Lowest point water dropping levels extending downward are arranged on the flashing parts, the fixed parts are fixed to a wall body through a fixing mechanism. The positions, provided with gaps with a water seepage wall body, on the angle covering plates are bonded through sealing glue. According to the joint structure, the flashing problems of joints such as high and low spans and inner gutters are better solved, compared with a leakage-proof structure of the prior art, the waterproof joint structure is more reasonable and better in effect.

The invention provides a tidal power generation systemdevice, which belongs to the field of renewable energy. The structure of the tidal power generation systemdevice comprises a floating disk and linear racks, the floating disk is arranged on the sea level, the linear racks are fixed on the floating disk, gears drive rotation accelerators, clutches and generators by means of the linear racks to generate electricity, and are also connected with spiral spring accumulators to wind up the spiral spring accumulators, energy can be converted into electric energy as the floating disk is driven by the buoyancy of seawater to go up and down, and thereby therefore the power generation rate of the conventional power generation systemdevice is unmatchable with the power generation rate of the tidal power generation systemdevice. Compared with the conventional technical scheme of power generation, the tidal power generation systemdevice can theoretically double the power generation rate at least, the spiral spring accumulators are energy accumulation mechanisms which can convert the kinetic energy and gravitational potential energy of up-and-down seawater into spring potential energy, and can store and convert the energy of the reciprocating intermittent action of tides into elastic potential energy which is utilized, the energy utilization rate can reach 95 percent, energy can be continuously and stably released, and the tidal power generation systemdevice can supply inexhaustible energy to people.

The invention relates to the technical field of fans, in particular to a double-layer blade of a centrifugal fan and the centrifugal fan including the double-layer blade. The double-layer blade of the centrifugal fan comprises an upper blade and a lower blade, and one face of the upper blade and one face of the lower blade are fixedly attached and connected. The double-layer blade of the centrifugal fan has the advantages that the blade is formed by fixedly overlapping the upper blade and the lower blade, therefore, the material selecting, material purchasing and producing and manufacturing difficulties are reduced, the cost is reduced, equipment safety and fan performance are guaranteed, the energy efficiency is improved, energy conservation and emission reduction are achieved, and the application range is widened.

The invention discloses a metal lampshade machining polishing device. The metal lampshade machining polishing device comprises a base, wherein one side of a top end of the base is provided with a sliding seat; a top end of the sliding seat is fixedly connected with an electric hydraulic rod; a top end of the electric hydraulic rod is fixedly connected with a support rod; one end of the support rodis provided with a polishing disk; the other side of the top end of the base is connected with a polishing table through a bearing; a second driving motor is fixedly arranged on one side inside the base; the second driving motor is fixedly connected with the axle center of the polishing table; a lampshade fixed seat is fixedly arranged in the middle of a top end of the polishing table; a cavity is fixedly formed in the middle of the lampshade fixed seat; an air pump is fixedly arranged in the middle in the polishing table; an air inlet end of the air pump is in communication with the cavity;and a chip pan is fixedly arranged on a side edge of the top end of the polishing table. Through the structural arrangement of the polishing table, a lampshade can be fixedly conveniently, and chips generated in the polishing process can be cleaned conveniently.

The invention discloses a fixing device for motorcycle engine end cover machining. The fixing device comprises a machine frame and further comprises a pull rod, a gland, an upper lug, a thread cap, a lower lug, a spring and a fixed base, wherein the pull rod, the gland, the upper lug, the thread cap, the lower lug, the spring and the fixed base are sequentially arranged on the machine frame from top to bottom. A counter bore is formed in the bottom face of the machine frame. The fixed base is fixed into the counter bore. The fixed base and the counter bore are positioned through a pin. The upper end of the fixed base is sunken inwards to form a groove allowing the lower lug to slide therein. The lower lug is connected with the middle of the pull rod through a pin. The spring is fixed between the lower lug and the bottom face of the groove. An external thread is arranged on the outer wall of the fixed base. An internal thread matched with the external thread is arranged on the inner wall of the thread cap. A handle is fixed to the outer wall of the thread cap. The upper lug is connected to the middle of the pull rod in a sleeving mode. The lower end face of the upper lug abuts against the upper end face of the lower lug. The upper end of the upper lug is fixed to the thread cap through a bolt. By means of the fixing device, clamping and positioning of workpieces can be achieved, the workpieces can be clamped rapidly, and the efficiency is greatly improved.

The invention discloses a mechanical clamp. The mechanical clamp comprises a clamp main body. A first fixing plate is arranged at one side of the top of the clamp main body. A second fixing plate is movably connected with the first fixing plate through a first rotating shaft. A handle is arranged at the inner side of the second fixing plate. A push rod is movably connected with the second fixing plate through a second rotating shaft. A first rear clamping plate is arranged at one end of the push rod. A first front clamping plate is arranged at the top of the clamp main body. A second left clamping plate is arranged at the other side of the top of the clamp main body. A second right clamping plate is fixed to the second left clamping plate through bolts. The first rear clamping plate is ina hollow semi-cylinder shape and is movably connected to the clamp main body through a first sliding groove. The circle center of the first rear clamping plate is located on a transverse central lineof the clamp main body. The first rear clamping plate can slide forwards and backwards through the push rod. The required fixation width can be adjusted conveniently; in addition, the cylindrical outer surface is smooth; and higher safety and reliability are achieved.

The invention relates to a positioning tool for welding of a high-pressure oil track support. A high-pressure oil track comprises a main pipe and an upright column support which is arranged in the middle of the main pipe and penetrates through the main pipe; oil atomizer seat holes are respectively formed in two ends of the main pipe; and an upright column through hole is formed in the upright column support. The positioning tool comprises a working table and a main pipe positioning table, wherein the main pipe positioning table is arranged on the working table; a main pipe positioning groove for placing the main pipe is formed in the main pipe positioning table; seat hole positioning pins which are respectively inserted in the oil atomizer seat holes in a matched manner and an upright column positioning pin a which is inserted in a lower opening of the upright column through hole in a matched manner are arranged in the main pipe positioning groove; a support upper positioning assembly capable of moving vertically is further mounted on the working table; and during mounting, the support upper positioning assembly moves downwards, is propped against the high-pressure oil track, and is fixedly placed on the high-pressure oil track in the main pipe positioning groove. Compared with the prior art, the positioning tool has the advantages of good positioning stability, capability of effectively avoiding welding deformation, simplicity in repair and change and the like.

The invention provides a barrier fixing device of vehicle collision test, and relates to vehicle collision test. The barrier fixing device comprises a collision wall, barrier connecting pieces, a collision barrier and fixing pieces, wherein the collision wall includes multiple grooves; the barrier connecting pieces can be maintained in the grooves selectively and move along the grooves; the collision barrier is used for offset or angular collision and connected with the barrier connecting pieces; and the fixing pieces can be connected with the barrier connecting pieces, and fit to the sidewall of the collision wall at one end of the grooves to prevent the barrier connecting pieces from moving in the grooves. The movement degree of freedom of the barrier connecting pieces along the groove direction is reduced by the fixing pieces, the barrier connecting pieces are prevented from moving along the groove direction, and the problem that the collision barrier connected with the barrier connecting pieces moves in the collision process is solved fundamentally.

The invention discloses an exposed frame grooved hollow glass curtain wall mounting structure. Two pieces of hollow glass which are arranged up and down are paved on a same transverse beam; a T-shaped pressing block is arranged between the two pieces of hollow glass; the left and right side arms of the T-shaped pressing block respectively extend into U-shaped mounting grooves formed in adjacent side surfaces of the two pieces of hollow glass and inner side surfaces of the left and right side arms are propped against the inner side walls of the U-shaped mounting grooves; the main rod of the T-shaped pressing block extends to the inner side to prop against the transverse beam; a fastening bolt preset in the transverse beam penetrates through the through hole in the T-shaped pressed block and is in matched connection with a screw nut. The exposed frame grooved hollow glass curtain wall mounting structure is manufactured in a finished product manner by using hollow glass of which the lower edge is grooved, and can be directly transported to a construction site to mount after being delivered, the problem that the bonding strength of silicone structure glue of a secondary adhered auxiliary frame cannot be ensured is solved, the fixation mode is firm and reliable, and the safety of a curtain wall can be greatly improved.

The invention relates to the technical field of grinding and polishing, in particular to a wall grinding device for building construction. The wall grinding device comprises a base. Sliding wheels arearranged at the bottom of the base. A telescopic rod is vertically arranged on the base. A grinding disc is arranged at the top of the telescopic rod and connected with a motor. The grinding disc issleeved with a dustproof cover. A dust collector is arranged on the base, and a guide pipe communicates between the dust collector and the dustproof cover. A guide rail is transversely arranged belowthe base and comprises a fixed segment and a moving segment. Lifting holes allowing the sliding wheels to penetrate are formed in the fixed segment. Base plates are hinged to the lifting holes. Torsion springs are arranged at the hinged positions of the base plates. The wall grinding device further comprises a fixing mechanism used for fixing the guide rail. The wall grinding device solves the problems that in the prior art, when a grinding machine is pushed manually, path deviation happens, the wall grinding force changes, and consequently grinding is not uniform.

The invention discloses a clamping mechanism for micro-arc oxidation on the top of an aluminum alloy piston. The clamping mechanism comprises a mounting seat, wherein a fixed plate is fixedly mountedat the top of the mounting seat, a base is fixedly mounted at the top of the fixed plate, a containing groove is formed in the base, a conducting rod is fixedly mounted in the base, two fixed seats are fixedly mounted at the top of the fixed plate, and a second moving groove is formed in each fixed seat. According to the clamping mechanism, an aluminum alloy piston workpiece is placed in the containing groove, a driving motor is started to rotate anticlockwise, a gear is driven to rotate anticlockwise, a first rack plate and a second rack plate are driven to move outwards according to the meshing transmission principle of clamping teeth, a first connecting rod and a second connecting rod are driven to rotate, then clamping rods are driven to move inwards, clamping hands are driven to clampthe aluminum alloy piston workpiece, the aluminum alloy piston workpiece is fixed through the clamping mechanism, the clamping force of the clamping mechanism is large, the fixing mode is stable andfirm, and the operability of the device is improved.