24010 results about "Rack and pinion" patented technology

The invention relates to the technical field of plastic pipe cutting machines, in particular to a plastic pipe cutting machine capable of improving pipe stability, comprising a workbench, and a cutting mechanism, a polishing mechanism and a driving mechanism mounted on the workbench; before the cutting mechanism cuts the plastic pipe, the plastic pipe can penetrate through the position between the two fixing rings, a cutting point can be placed in the middle of the position between the two fixing rings, the distance between the two fixing rings is adjusted through the driving mechanism, and due to the fact that a gear is meshed with a rack, the cutting point can be adjusted. Therefore, simultaneous radial movement of the racks arranged on the fixing ring in a circumferential array mode is achieved, clamping of the plastic pipe is completed, stability during cutting is guaranteed, and the problems that during cutting, a cutting opening is expanded, the plastic pipe at the cutting end inclines due to the gravity of the plastic pipe, cutting accuracy is affected, resistance during rotating and cutting is increased, and cutting quality is improved are solved. Random rotation during cutting is avoided, the clamped plastic pipe can rotate in the radial direction along with rotation of the second magnetic ring, all-directional cutting is achieved, and accuracy is improved.

The invention relates to the technical field of reagent detection, and discloses a reagent detection device and a using method thereof.The reagent detection device comprises a fixing base, a supporting base is arranged on the outer side of the fixing base and driven by a motor in the fixing base, a plurality of reagent mixing mechanisms are installed on the supporting base, and each reagent mixing mechanism comprises a first rotating sleeve; the end part of a rotating shaft of the first rotating sleeve is connected with a support frame, a second rotating sleeve is rotationally arranged in the first rotating sleeve, and the second rotating sleeve is used for clamping a reagent tube. According to the reagent detection device, when a supporting seat rotates, a first transmission gear is in intermittent contact with an arc-shaped rack, so that a first rotating sleeve drives a reagent tube to perform inclination state adjustment, and meanwhile, a second transmission gear is meshed with a fixed gear ring to generate rotation, so that the second rotating sleeve drives the reagent tube to quickly rotate; therefore, the reagent tube rapidly rotates in an inclined state to drive the solution in the reagent tube to roll over, so that the solutions at different heights are mixed and exchanged, and the mixing effect of the solutions is improved.

The invention relates to the technical field of steel box girder welding, and particularly discloses a steel box girder welding positioning device which comprises a fixing assembly fixed to a bottom plate and a positioning assembly connected with a web, and the positioning assembly comprises a bearing plate assembled on the fixing assembly in an up-down sliding mode and a first positioning piece for positioning the web front and back. The first positioning piece comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are assembled on the bearing plate in a front-back sliding mode to clamp the web, racks are arranged on the first clamping plate and the second clamping plate, guide gears matched with the racks are arranged on the bearing plate, and a guide rod is assembled on the bearing plate in a sliding mode, penetrates through the guide gears and is in threaded fit with the guide gears. A baffle is arranged at the end of the guide rod, a limiting plate is arranged on the fixing assembly, and an adjusting assembly used for adjusting the distance between the web and the bottom plate is arranged on the fixing assembly. The steel box girder welding positioning device has the effect of improving the welding quality.

The invention discloses an electronic assembly welding workbench. Comprising a gantry workbench structure, a smoke suction mechanism, a welding angle adjusting mechanism and a double-station clamping mechanism. A rotating cylinder is arranged on the surface of the smoke suction cylinder through matching of a driving worm and a worm gear ring so as to realize multidirectional angle adjustment of the welding gun; the circuit board is rapidly clamped through the action of the rack, the driving gear and the extrusion convex strip, and double-station cross feeding and discharging are achieved; the smoke suction mechanism concentrates and efficiently discharges smoke through a horn and a corrugated pipe; and automatic multi-angle welding can be implemented by combining a tin wire placing machine and a sensor, so that the welding efficiency and quality are remarkably improved.

The invention provides a cable protection pipe butt welding device, and relates to the technical field of welding, the cable protection pipe butt welding device comprises a welding table, two butt joint tables are arranged at the top end of the welding table, two fixing seats are fixedly mounted at the top ends of the butt joint tables, and a fixing assembly for fixing a cable protection pipe is arranged between the two fixing seats; a grinding assembly used for grinding the cable protection pipe is arranged in the middle of the welding table, the fixing assembly comprises two supporting frames fixedly connected to the top end of the butt joint table, an annular rack is rotationally connected between the two supporting frames, and a clamping assembly used for fixing the cable protection pipe is arranged on the inner wall of the annular rack. Annular guide rails are fixedly connected to the two sides of the outer surface of the annular rack, the cable protection pipe is fixed to an inner cavity of the annular rack through the clamping assembly, the cable protection pipe can rotate according to changes of the welding position through the annular rack, the flatness of the welding position is guaranteed through the grinding assembly, and the welding efficiency and quality of the device are effectively improved.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

A dehumidifier according to an embodiment may include a housing including a suction grill formed on a rear surface thereof, and a discharge port formed on an upper surface thereof; a dehumidification module provided inside of the housing; a water tank detachably provided on one side of the housing and that stores condensate generated during a dehumidification process; a discharge cover that opens and closes the discharge port; a tilting module connected to a bottom of the discharge cover inside of the housing to tilt the discharge cover; and a shielding cover that accommodates the tilting module. The dehumidification module may include at least a compressor, a condenser, an evaporator, and a fan module. The tilting module may include a tilting motor fixed to the shielding cover; a tilting gear connected to a shaft of the tilting motor; and a tilting neck curved at a predetermined curvature and having on one surface thereof a tilting rack that engages with the tilting gear.

The invention discloses a steel structure butt welding adjusting device and method, and relates to the technical field of steel structure welding, the steel structure butt welding adjusting device comprises a welding table, fixing seats are symmetrically and fixedly connected to the upper end face of the welding table, steel pipe bodies are placed above the fixing seats, and the steel pipe butt welding adjusting device further comprises a steel pipe alignment detection mechanism and a welding path pretreatment mechanism; the steel pipe alignment detection mechanism comprises symmetrically-arranged circular rings, annular grooves are formed in the two sides of each circular ring, supporting frames are arranged on the two sides of each circular ring, the supporting frames are fixedly connected to the upper end face of the welding table, the circular rings are rotationally connected between the two supporting frames through the annular grooves, and annular racks are fixedly connected to the outer surfaces of the circular rings. The annular racks are in meshed connection with transmission gears, and a driving shaft is fixedly connected between the two transmission gears in a penetrating mode, so that the alignment condition can be rapidly detected after the steel pipe body is placed, a worker can rapidly conduct adjustment according to the detection result, the time for manual repeated inspection and adjustment is shortened, and the steel pipe body adjusting efficiency is improved.

In accordance with at least one aspect of this disclosure, an adjustable stock system for weapons and / or other suitable devices incudes an adjustable stock, a mounting box defining an interior cavity and a mounting feature configured to mount the adjustable stock to a device, and a moveable assembly including one or more moveable components configured to move relative to the mounting box. The moveable assembly comprises, at least, a rack and pinion assembly configured to bias a buttpad toward an extended position, and a rack stop configured to hold the rack and pinion assembly in place at a desired position.

The utility model relates to the technical field of metal material welding, in particular to a black metal smelting rolled product welding device which comprises a base, two metal pipes horizontally placed above the base and with the two ends aligned, and a welding head arranged at the upper end of the base. The first motor is driven to drive the second gear to rotate on the rack, so that the welding positions of the metal pipes abut against each other, the metal pipes with different length specifications and outer diameter specifications are extruded, fixed and welded, it is guaranteed that the welding positions of the metal pipes are kept in a stable abutting state all the time when the metal pipes are welded, and the welding quality and efficiency are improved; and meanwhile, a second electric telescopic rod drives a first electric telescopic rod to stretch out and draw back to the welding position of the metal pipe, and then the first electric telescopic rod drives a welding head to abut against the metal pipe, so that the welding head conducts comprehensive welding work on all the welding faces of the metal pipe.

The present application relates to the technical field of piano, in particular to a piano pedal system, comprising an external unit and an additional unit; the external unit comprises: an external pedal module comprising at least one external pedal; a data acquisition module for acquiring the pedal data of the external pedal; a height adjustment module comprising a driving mechanism and two supporting mechanisms, the driving mechanism comprising a driving motor, a driving gear fixedly connected with the output shaft of the driving motor and two driving racks, the two driving racks being oppositely engaged on both sides of the driving gear, the supporting mechanisms being one-to-one arranged with the driving racks, the supporting mechanisms being connected between the driving racks and the external pedal module, the driving racks driving the supporting mechanisms to stretch or retract to realize the height adjustment of the external pedal module; the additional unit is used for stepping on the corresponding piano pedal according to the pedal data. The present application can be applied to different types and models of pianos and improve the accuracy and convenience of the height adjustment of the pedal.

The invention relates to rotary drilling rig building pile foundation hole forming equipment and a construction method thereof, and relates to the technical field of rotary drilling rig equipment.The rotary drilling rig building pile foundation hole forming equipment comprises a vehicle body, a driving assembly is slidably connected to a suspension arm of the vehicle body in a limiting mode, a second winding assembly is arranged below the driving assembly, and an extension rod is arranged at the bottom end of the driving assembly; a transmission rod is arranged at the bottom end of the extension rod, a drill bit is fixedly connected to the bottom end of the transmission rod, the transmission rod is sleeved with an upper drilling cylinder, the upper drilling cylinder is provided with a limiting assembly, a lower drilling cylinder is sleeved with the lower portion of the interior of the upper drilling cylinder, and two racks are symmetrically and fixedly welded to the top end of the lower drilling cylinder. Two servo motors are fixedly arranged at the top end of the upper drilling barrel through bolts, the output ends of the two servo motors are each connected with a gear, and the arrangement of the structure can enlarge the soil storage space between the upper drilling barrel and the lower drilling barrel, so that the frequency of removing the upper drilling barrel and the lower drilling barrel out of a drilled hole for soil discharging is reduced; the construction efficiency of the whole device is improved.

The utility model discloses an automobile wire harness detection device, and specifically relates to the technical field of automobile wire harnesses, the automobile wire harness detection device comprises a detection bench, the two sides of the top surface of the detection bench are fixedly provided with protection boxes, the two protection boxes are internally provided with wire harness detectors used for detecting automobile wire harnesses, and the top surface of the detection bench is provided with two fixing frames. According to the automobile wire harness detection device, in actual work, when the fixing frame drives the rack to get close to the protection box, the rack can drive the first gear to rotate, the first gear rotates to drive the second gear to rotate so as to drive the rotating shaft to rotate, and then the dustproof plate can be driven to turn over, and when the rack gets away from the protection box, the dustproof plate can be driven to turn over. When the wire harness detector is not used, dust can be effectively prevented from entering a wire harness socket of the wire harness detector, and the detection effect is prevented from being affected due to the fact that the dust enters the wire harness socket.

The invention discloses an automatic municipal steel structure welding device and a welding process thereof, and belongs to the field of steel structure welding. Comprising a movable driving mechanism, and a welding mechanism is arranged behind the upper surface of the movable driving mechanism; the moving driving mechanism comprises a concave base, the interior of the concave base is rotationally connected with a two-way screw rod through a rotating shaft, and a rack is fixedly connected to the position, located behind the two-way screw rod, of the interior of the concave base; in the process that the movable driving mechanism drives the movable mounting mechanism to move, the two circular workpieces put on the two clamping mechanisms can be clamped while being close to each other to shorten the butt joint distance, the problem that in the prior art, after the workpieces need to be independently controlled to be clamped, the workpieces are controlled to move is solved, and the working efficiency is improved. The automatic clamping effect is achieved in the process that the workpieces get close to each other, the distance needing to be adjusted during follow-up butt joint is shortened, and follow-up butt joint work is facilitated.

The present invention relates to an assembled steel sheet pile enclosure structure and a construction apparatus and construction method therefor. A waterproof curtain of the enclosure structure is formed by continuously assembling a plurality of steel sheet piles. Guide-rail-type steel enclosing purlins are detachably connected to the waterproof curtain. Self-adaptive flange devices are detachably connected to the guide-rail-type steel enclosing purlins. A hydraulic device, a moving pile clamping device, a vertical rod, and a fixed pile clamping device of the construction apparatus are sequentially connected from bottom to top and are fixed to one side of a base; a counterweight block is fixed on the other side of the base; and pressure-adjustable tires are arranged at the bottom of the base. The construction method comprises: a pushing rod moving towards a foundation pit; a connecting rod assembly driving a moving gear to extend out of a housing and be engaged with a rack of the corresponding guide-rail-type steel enclosing purlin; driving the moving gear to rotate and drive the corresponding self-adaptive flange device to slide to a steel support mounting position along the rack; the pushing rod moving in the direction facing away from the foundation pit; the connecting rod assembly driving the moving gear to be disengaged from the rack; and a brake synchronously extending out of the housing and being meshed and fixed with the rack.

The invention provides a multifunctional cycle power generation system and method by a gravity lever. The system comprises a supporting rack and a balance weight arranged on the supporting rack and slidably matched with the supporting rack, wherein engines are arranged on one side or two sides of the balance weight; the input shaft of each engine is connected to a transmission shaft; two or more single-directional clutches are fixedly connected to the middle of the transmission shaft; the locking directions of the single-directional clutches are same, gears are fixed to the peripheries of thesingle-directional clutches, and a rack matched with each gear to drive the transmission shaft to rotate is arranged next to each single-directional clutch; at least one pair of racks is arranged on the upper part and the lower part, separately, the racks and the balance weight which reciprocates are in driving movement and the balance weight is arranged on the supporting rack to swing through a lifting mechanism in a reciprocating manner. As the balance weight which swings in the reciprocating manner pulls the racks to drive the transmission shaft to rotate in the single direction, multiple engines can be driven synchronously to generate electricity synchronously, and the power needed by a supporting rack lifting device is alleviated greatly by means of a swing mode like to a lever, so that the energy sources are saved and the power generation efficiency is improved greatly.

The invention belongs to the technical field of boring machine tools, and discloses a multi-station numerical control double-face boring combined machine tool which comprises a base and a boring cutter located above the base, and an adjusting mechanism used for adjusting the rotating radius of the boring cutter is arranged above the base. A first driving mechanism used for driving the boring cutter to rotate to bore a workpiece and a second driving mechanism used for driving the external workpiece to rotate to bore the workpiece through the boring cutter are arranged above the base, the arc-shaped rack and the arc-shaped clamping plate can rotate at different positions, and therefore different working modes of the machine tool are completed; when the arc-shaped rack is meshed with the first gear, the boring cutter can be driven to rotate through rotation of the arc-shaped rack, and a workpiece fixed to a machine tool is bored. And when the arc-shaped rack and the arc-shaped clamping plate are far away from the first gear, the arc-shaped clamping plate can be driven by the electric telescopic rod to clamp the workpiece to drive the workpiece to rotate, and a boring cutter is used for boring.

The invention discloses a mahjong machine and a slope tile playing device thereof, which are characterized in that a planet carrier and a planet wheel which rotate actively rotate around a fixed sun wheel, and a tile feeding push rod is driven by the planet carrier, the planet wheel and a turntable to rotate to push and feed tiles; a mahjong lifting swing arm is driven by a planet carrier, a swing rod, a rack and a mahjong lifting gear to swing to drive a mahjong lifting supporting plate to lift mahjong; two transmission paths of a planet carrier and a planet wheel are ingeniously utilized, so that a mahjong feeding push head does not push mahjong tiles when a mahjong tile lifting supporting plate is controlled to descend only through mechanical transmission cooperation by a motor, and the mahjong tile lifting supporting plate does not move when the mahjong tile feeding push head pushes the mahjong tiles; when the tile lifting supporting plate is lifted, the tile feeding pushing head does not push tiles, after the tile lifting supporting plate is lifted, the tile feeding pushing head moves out of the tile storage groove, the lifting action of the tile lifting supporting plate and the tile pushing action of the tile feeding pushing head do not interfere with each other, the structure is simple and reasonable, action connection is good, operation is stable and reliable, the mahjong machine is coherent and smooth in action, noise is low, and the user experience is good.

The invention discloses a suspension chain type conveying assembly for impregnating insulating paint of electrical accessories, which is characterized in that a gear on a suspension assembly is matched with a bearing rack on a bearing rail to drive an electrical product to rotate, a guide seat with a guide rack is additionally arranged above a paint impregnating pool, a disc with a gear roller is additionally arranged on the suspension assembly, and the gear roller is arranged on the disc. When the hanging assembly is conveyed to the paint dipping pool, the gear roller is horizontally conveyed into the guide rail and rolls along the end face of the guide rack to do up-and-down fluctuating motion, and due to the fact that the gear roller and the disc are rotationally installed, and the disc and the outer sleeve are telescopically installed, the disc moves up and down under the guiding effect of the gear roller on the premise that rotation work of the disc is not affected; the electric appliance product can stably rotate and move up and down in the dipping process, the hook is used for simply hanging the electric appliance product, feeding and discharging are facilitated, the contact face between the electric appliance product and the hook is continuously changed in the shaking process, and the dipping effect is improved.

The invention discloses an anti-pulling protection mechanism for a charging pile, and belongs to the technical field of charging equipment, and the anti-pulling protection mechanism comprises the charging pile which is used for providing electric quantity; the charging head is connected with the charging pile through a charging wire and used for charging the vehicle; the separating mechanism comprises a steel wire rope arranged on the charging head and is used for separating the charging head from a charging hole in the vehicle; the separating mechanism is further provided with a releasing assembly which comprises a pressing rod arranged on the charging head handle and a buckle component used for releasing the charging head handle. In the invention, when a user does not pull out a charging head after charging and drives a vehicle to be pulled, a steel wire rope is tensioned to trigger a separation mechanism, a hydraulic system transmits pressure to a handle buckle through an oil cavity and a sliding rod to unlock, and meanwhile, a rack I, a rack II and a circular gear are linked to push a push rod to push out the charging head, so that the charging head is separated from a charging interface; the mechanical damage caused by accidental pulling of the charging wire and the charging pile is effectively avoided, and the equipment safety is remarkably improved.

The invention relates to the technical field of part machining and positioning, in particular to a positioning device for part machining and a using method.The positioning device comprises a mounting rail, a primary clamping mechanism, a non-planar clamping mechanism, a shape follow-up mechanism, an axis keeping mechanism and a clamping, locking and pressurizing mechanism; the outer wall of the main gear is engaged with a displacement rack, and a fixed seat and a sliding seat are arranged above the mounting rail. Primary axis positioning is conducted on the shaft part through the primary clamping mechanism, then when one end of the machined shaft part is in a special shape, the shape follow-up mechanisms are attached to the special-shaped end face, and then any shape follow-up mechanism can trigger the axis maintaining mechanism to lock the position of each shape follow-up column at the moment; the shape follow-up mechanism is suitable for special-shaped faces of any shapes, and the shape follow-up mechanism can be matched with the clamping, locking and pressurizing mechanism to enable the non-planar clamping mechanism to pull force downwards and inwards, so that clamping of the clamping rubber on the outer walls of the special-shaped shaft parts is enhanced.

The utility model discloses a floor sweeping robot shell injection molding mould, a vibration mechanism comprises a motor, two driven gears, a rack and a sliding chute, the motor is fixedly installed at the bottom of a base, the output end of the motor penetrates through the base and is fixedly connected with a driving gear, the two driven gears are symmetrically arranged front and back by taking the driving gear as the center, and the rack is fixedly connected with the driving gear. The two driven gears are meshed with the driving gear, gear shafts are fixedly connected to the driven gears, one end of each gear shaft is rotationally connected to the top of the base, the other end of each gear shaft is fixedly connected with a sector gear, the sector gears are meshed with a rack, and knocking assemblies are movably connected to the two ends of the rack. Relates to the technical field of injection molds, a motor drives a main gear to rotate, so that a rack drives a knocking assembly to impact the outer walls of an upper mold base and a lower mold base back and forth, the upper mold base and the lower mold base are fully filled with plastic melt, and the situation that product manufacturing is unqualified due to insufficient fluidity is avoided.

The invention relates to the technical field of tire stacking, in particular to a stacking device for tire production. Comprising a conveying base; the fixing plate is fixedly connected to the conveying base; the first motor is fixedly connected to the fixing plate, and an output shaft of the first motor is provided with a straight gear; the sliding plate is connected to the fixed plate in a limiting and sliding mode, the sliding plate is fixedly connected with a rack frame, and the rack frame is meshed with the straight gear; the two clamping plates are connected to the sliding plate in a limiting and sliding manner; the baffle shaft is connected to the sliding plate in a sliding mode, and the two clamping plates are both connected with the baffle shaft in a sliding mode. According to the tire stacking device, when tire stacking is clamped, pulling force is applied to the force reducing shafts, stress concentration at the connecting position of the external fixing plate and the sliding plate and the connecting position of the clamping plates and the sliding plate is counteracted, the situation that the sliding plate and the two clamping plates are stuck due to deformation caused by long-time stress concentration is avoided, and therefore it is guaranteed that the tire stacking speed is stable.

The invention relates to the technical field of building construction, and discloses an overall lifting steel platform self-climbing power system and method.The overall lifting steel platform self-climbing power system comprises a climbing column, the left side and the right side of the climbing column are each provided with a climbing sleeve, and the front side and the rear side between the two climbing sleeves are each provided with two connecting covers; climbing grooves are formed in the center axis positions of the front side and the rear side of the climbing column correspondingly, racks are fixedly connected to the sides, close to each other, of the inner walls of the two climbing grooves correspondingly, opening openings of the two racks face upwards, and a hydraulic cylinder is arranged between every two adjacent connecting covers. Initial locking and secondary locking are repeated, the process is automatically completed by driving a locking pin through a spring damping rod, manual high-altitude clamping block clamping position switching is not needed, the locking process is coherent and efficient, the time needed by each time of locking is greatly shortened, the overall operation rhythm of the steel platform self-climbing power system is accelerated, the construction efficiency is improved, and the construction cost is reduced. And the workload of operators is obviously reduced, and the construction safety and convenience are improved.

The invention discloses a teflon film puncture resistance detection device, which comprises a base, a guide rail arranged on the top of the base, a sliding block arranged on the guide rail, a hydraulic cylinder arranged on the rear side of the guide rail and arranged on the top of the base, a connecting rod connected to a piston rod of the hydraulic cylinder, the connecting rod is connected with the sliding block, and the front side of the sliding block is connected with a connector through a cross rod. The connector is provided with a puncture needle used for puncturing a film, a guide sleeve is installed on the lower portion of the guide rail in an embedded mode, a slotting sliding plate is arranged in the guide sleeve, the slotting sliding plate is provided with a left clamping mechanism and a right clamping mechanism which are used for clamping the film, and a driving mechanism is arranged between the guide sleeve and the guide rail. Through the synergistic effect of a cross rod, a threaded sleeve, a threaded rod, a lifting plate, a rack and a gear, in the process that a puncture needle completes one-time puncture detection and moves upwards to reset, a slotting sliding plate can be driven to drive a Teflon film to move rightwards through a clamping mechanism, and therefore puncture points are automatically switched; the function of performing puncture detection on each position of the Teflon film is realized.

The utility model discloses a support for steel structure welding, and relates to the technical field of steel structure welding. The support for welding the steel structure comprises a welding table, two arc-shaped grooves are oppositely formed in the welding table, gear rings are movably arranged in the arc-shaped grooves, a plurality of electric push rods are installed on the inner sides of the gear rings, and the telescopic ends of the electric push rods are connected with clamping plates so that the steel structure to be welded can be conveniently clamped and fixed; a lead screw is arranged on the lower side of the welding table, a movable plate is arranged on the lead screw in a threaded mode, fixed rods are fixed between the movable plate and the racks on the two sides, under the action of the lead screw, the movable plate can be conveniently adjusted to move front and back, and the racks are driven to synchronously move in combination with the fixed rods; and therefore, the purpose of synchronously adjusting the two to-be-welded steel structures to rotate is achieved, welding operation can be conveniently carried out on the circle of the butt joint of the steel structures, workers do not need to turn over the steel structures, manpower is saved, and the welding efficiency is improved.

The utility model relates to the technical field of powder coating production, in particular to a fragment feeding mechanism for powder coating production, which comprises a support mechanism and a suction mechanism for realizing automatic feeding of powder coating fragments, and the suction mechanism is mounted above the support mechanism. The suction mechanism is arranged, the suction machine body and the motor are started, the motor drives the gear to rotate through the rotating shaft, the gear rotates to drive the rack to descend, the rack descends to drive the lifting disc and the lifting pipe to descend, and the lifting pipe descends and extends into the charging barrel. Powder coating fragments in the central area of the material barrel enter the material suction machine main body through the lifting pipe and the fixed pipe under the action of negative pressure, and the powder coating fragments in the peripheral area of the material barrel gradually flow to the central area along with continuous descending of the lifting pipe; and powder coating fragments in the charging barrel are completely sucked into the material suction machine main body.

Provided is a display device comprising: a display panel outputting an image on the front thereof; and a drive unit coupled to the back of the display panel and moving the display panel in the vertical direction, wherein the drive unit comprises: a motor providing rotational force; a pinion gear module which rotates by means of receiving the rotational force of the motor and which includes a first pinion gear and a second pinion gear arranged side by side in the vertical direction; and a rack gear located on the back of the display panel, extending in the vertical direction, and maintaining engagement with at least one of the first pinion gear or the second pinion gear.

The invention provides a crane mechanical arm welding tool, and belongs to the technical field of crane welding. The tool comprises a welding table, a positioning clamping plate, a pushing nut cylinder, a rack and a limiting baffle, a first supporting plate is fixedly arranged on the welding table, the positioning clamping plate is configured to slide along the welding table, the pushing nut cylinder is rotationally arranged on the first supporting plate, a pushing threaded rod is connected into the pushing nut cylinder through threads, and the positioning clamping plate is connected with the pushing threaded rod; a gear is fixedly arranged on the pushing nut cylinder, the rack is meshed with the gear, the rack is configured to move relative to the gear and used for driving the gear to rotate, the limiting baffle is used for limiting the moving distance of the rack, and the position of the limiting baffle is adjustable. The crane mechanical arm welding tool can meet the requirement for continuous welding of U-shaped steel plates and C-shaped steel plates.

The invention discloses an automobile aluminum alloy integrated die-casting part demolding ejection device, and relates to the field of die casting, the automobile aluminum alloy integrated die-casting part demolding ejection device comprises a first mounting frame and a first driving motor mounted on one side of the bottom of the first mounting frame, two pushing mechanisms are symmetrically mounted at the top of the first mounting frame, and ejection mechanisms are fixedly mounted at the tops of the pushing mechanisms. According to the invention, the pushing mechanism is driven to realize ejection operation, multiple adjustable ejection rods are arranged to adapt to die castings with different sizes and ensure uniform stress, a gear ring rotates under the limitation of an outer ring, multiple transmission gears are driven to be meshed synchronously, and a rack is further driven to move, so that the coordinated adjustment of the positions of the ejection rods is realized; the ejector rods can be synchronously gathered or dispersed according to the size of a casting, so that uniform distribution of ejection force is effectively guaranteed, deformation or damage caused by uneven stress of the die casting is avoided, and the stability and efficiency in the demolding process are improved through the structural design.