1655 results about "Idler-wheel" patented technology

A numerical-control intelligent air-suction seed metering device, comprising a front shell 1, a rear shell 2, a seed metering disc 3, a built-in fan, a direct drive motor, and an individual seed metering unit intelligent controller 180, wherein a seed inlet 11, a seed outlet 12, and air inlets 13 are formed in the front shell, and the built-in fan is provided on the rear shell; seed suctioning holes 31 are formed in the seed metering disc, a seed filling chamber 7 is formed between the seed metering disc and the front shell, and a negative pressure chamber 8 is formed between the seed metering disc and the built-in fan; the seed metering disc is connected to a drive idler wheel 6; the direct drive motor comprises a stator core 5 and a plurality of magnetic steels 61, the stator core is fixed on the outer wall surface of a fixed drum, and the plurality of magnetic steels are fixed onto the drive idler wheel. In the technical solution, a built-in motor is used to directly drive the seed metering device, so that the seed metering device operates more stably and precisely; the speed of the built-in fan can be adjusted in real time by means of the individual seed metering unit intelligent controller on the basis of seeding requirements and crop types, so as to achieve a negative pressure suction force most suitable for the seed metering device, implement adjustment of the precision seeding rate of an individual seed metering device, and achieve the purpose of improving seeding precision.

A clutch for selectively coupling a motor and a motor vehicle drive train includes a housing having two pressure chambers, a shift sleeve, an actuating cap arranged for moving the shift sleeve, a piston, an idler gear and a mechanical engaging element. The piston is arranged in the housing between the two pressure chambers in a pressure-dependent, axially movable manner and is connected to the actuating cap. The mechanical engaging element is arranged between an axially movable component and an axially fixed component to engage the shift sleeve in two different axial positions. The axially movable component may be the shift sleeve or the piston, and the axially fixed component may be the housing or the idler gear.

The invention discloses a variable-interval non-parallel multi-material clamping composite grabbing manipulator. The variable-interval non-parallel multi-material clamping composite grabbing manipulator comprises a material conveying assembly, a material grabbing clamping jaw assembly and a clamping jaw driving assembly. The two sets of material grabbing clamping jaw assemblies are symmetrically arranged on the two sides of the material conveying assembly, each material grabbing clamping jaw assembly comprises a clamping jaw supporting frame horizontally arranged above the roller support, driving idle wheels are rotationally installed at the two ends of each clamping jaw supporting frame through rotating shafts, and the driving idle wheels are sleeved with synchronous belts. A claw telescopic driving motor is vertically installed in the middle of the clamping claw supporting frame through a support, and a steering idle wheel used for adjusting the direction of the synchronous belt is further vertically installed on the side face of the claw telescopic driving motor. The manipulator in the technical scheme is simple in structure, flexible in clamping and high in space utilization rate; the problems that a traditional clamping jaw is large in thickness, and the space between goods shelf layers cannot be compressed are solved, and the clamping jaw can be used in areas with limited storage density and has the advantages of being light in weight and high in reliability.

A developing cartridge may include: a casing; a developing roller extending in a first direction; a developing-roller gear; a coupling including a coupling gear; a first idle gear; a second idle gear; an agitator; a first agitator gear; and a protrusion. The developing-roller gear, the coupling, the first idle gear, the second idle gear, the first agitator gear, and the protrusion may be positioned at an outer surface of the casing. The protrusion may be positioned between a first axis of the coupling and a third axis of the first agitator gear in a second direction connecting the first and third axes. The protrusion may be positioned outside an addendum circle of the developing-roller gear, an addendum circle of the coupling gear, an addendum circle of the first idle gear, and an addendum circle of the second idle gear. The first agitator gear may be spaced apart from the protrusion in the first direction.

A robot middle joint for tendon movement control comprises a first joint support structure, a second joint support structure and a middle joint rotating supporting shaft, and the top of the second joint support structure is rotationally connected with the bottom of the first joint support structure through the middle joint rotating supporting shaft. One end of the joint rotation supporting shaft is fixedly installed on the top of the second joint support structure, at least one idle wheel wire coil is rotatably installed on the middle joint rotation supporting shaft, and a middle joint output wire coil is further fixedly installed on the middle joint rotation supporting shaft. The middle joint output wire coil is fixedly connected with the top of the second joint support structure, and the second joint support structure is fixedly supported at the other end of the middle joint rotating supporting shaft through the middle joint output wire coil. The utility model discloses simple structure, it is convenient to install, dismantle and follow-up maintenance, and each idle wheel wire coil and output wire coil do not interfere with each other, can realize steady operation.

The utility model relates to the technical field of tobacco planting, in particular to a mulching film perforating machine based on tobacco seedling well cellar transplanting operation, which comprises a mounting frame, a detection component is arranged on one side of the outer part of the mounting frame, and a plurality of perforating heads which are movably connected are arranged on the other side of the outer part of the mounting frame; and the detection assembly comprises a supporting frame, the supporting frame is arranged on the mounting frame, the bottom of the supporting frame is provided with a movably-connected transfer frame, and one side of the interior of the transfer frame is provided with an encoder. According to the mulching film perforating machine based on tobacco seedling well cellar transplanting operation, through the arrangement of the detection assembly, when the mulching film perforating machine is used, the encoder is driven to rotate through the idler wheel, the moving distance of the mulching film perforating machine can be detected in real time through terminal control, and when the detected distance is integer multiples of the set hole gap distance, the mulching film perforating machine can be used for perforating tobacco seedlings. The air cylinder can be controlled to work, the punching head moves downwards to conduct punching, and therefore the device can flexibly adjust the row spacing of punched holes.

The utility model relates to the technical field of engine crankshaft power transmission, in particular to a transmission assembly of an in-line piston engine, an engine and an aircraft thereof, which comprise a crankshaft body, the crankshaft body comprises a plurality of crank pins, a plurality of cranks and a plurality of journals which are sequentially arranged in a staggered manner from the front end to the tail end, a driving gear is arranged at the front end of the crankshaft body and integrally formed with the crank, the center of the driving gear and a shaft neck of the crankshaft body are arranged on the same central axis, a transmission mechanism is arranged outside the driving gear in an engaged mode, and the transmission mechanism comprises a damping gear assembly, a transmission gear, an idle gear and an output gear which are sequentially engaged. The integral layout is optimized, the structure is compact, the simple idle gear is additionally arranged, an original idle gear shaft transmission mechanism is replaced, the basic function of speed reduction of an engine is achieved, and meanwhile the purposes of miniaturization, light weight, stability and aircraft carrying performance of the engine are achieved.

It is described an instrument feeder device (201) for use in an endoscope system, for feeding a medical instrument (202) into a body or withdrawing the medical instrument from the body, the instrument feeding device comprising: a connector (302) for connecting the instrument feeding device (201) to a motor 5 (203) for moving the medical instrument (202) through the instrument feeding device (201); a drive wheel (303) arranged to be rotated by the motor, wherein the drive wheel (303) is positioned on one side of the medical instrument (202), an idler wheel (310) positioned on an opposite side of the medical instrument 10 relative the drive wheel (303), a clutch mechanism adapted to push the idler wheel (310) against the medical instrument (202), the clutch mechanism including a rotary button (1012) connected to a spindle (1111), the spindle including a main part and an eccentric part (1111a) which is arranged offset relative a center line through the main part, 15 wherein the idler wheel is rotatably mounted on said eccentric part of the spindle.

The invention relates to the technical field of robot welding guns, in particular to a robot welding gun neck capable of reducing wire feeding resistance. The robot welding gun neck comprises an outer pipe and an inner pipe, the inner pipe is a special-shaped pipe, a wire feeding channel extending in the axial direction of the inner pipe is arranged on the upper portion of the inner pipe, and a notch is formed in the bottom side of the wire feeding channel; a set of idler wheels are arranged in the wire feeding channel, and welding wires can penetrate through cavities between the idler wheels and the notches. The structural form of the inner pipe and the outer pipe is adopted, the special grooves are designed in the inner pipe to serve as wire feeding channels, the roller sets are placed in the grooves, sliding friction with large resistance in the wire feeding process is changed into rolling friction with low resistance through the roller sets, and therefore the wire feeding stability is improved.

The utility model belongs to the technical field of automobile seats, and provides a slide rail driving device and an automobile seat, the device comprises a track mechanism and a driving mechanism, the track mechanism comprises a first guide rail and a second guide rail which are arranged in parallel, a first lead screw is arranged in the first guide rail, and a second lead screw is arranged in the second guide rail; the driving mechanism comprises a power frame erected between the first guide rail and the second guide rail, a motor installed on the power frame, and a first gear box and a second gear box which are arranged at the two ends of the power frame, and a first transmission shaft and a second transmission shaft are coaxially arranged at the two axial ends of the motor correspondingly; a first input gear, a first idle gear and a first output gear are arranged in the first gearbox, the first input gear is connected with the first transmission shaft, the first output gear is connected with the first lead screw, a second input gear and a second output gear are arranged in the second gearbox, and the second input gear is connected with the second transmission shaft. And the second output gear is connected with the second lead screw, universality is good, and noise is low.

The utility model relates to the technical field of steel pipe processing equipment, in particular to a closed type steel pipe anticorrosive coating coating device which comprises a device frame, a spraying head connected with a telescopic cylinder is installed on the device frame, a raw material bin is arranged on the device frame, and anticorrosive paint is condensed on the wall of a steel pipe to form an anticorrosive coating. The raw material bin is connected with the spraying head through a conveying pipeline, a conveying pump is installed in the middle of the pipeline, a plurality of sets of rollers are further installed on the device frame from left to right, and the rollers are connected with a roller motor. The box body comprises a main body box at the lower part and a box cover at the upper part, the box body is provided with an internal box cavity, the side surface of the box body is provided with a through hole, the telescopic cylinder extends into the box cavity through the through hole, and the plurality of groups of rollers are arranged in the box cavity. The device has the advantages of being capable of reducing harm to operators and beneficial to environment protection.

The utility model provides a double-track integrated curtain track and assembly, including track, sealing piece, mounting weight, roller, pulley, the track of the utility model adopts the design that one track has two grooves and two ends are open, a plurality of pulleys are arranged at intervals in the pulley groove arranged at the bottom of the track, and a plurality of rollers are arranged at intervals in the roller groove arranged in the middle of the track. Roller suspension arms of the rollers transversely extend out of notches of the roller grooves and are not in contact with the rails, so that roller suspension rings on one sides of the rails and pulley suspension rings at the bottoms of the rails are kept at enough distances, and two layers of curtains are not in contact to affect use after the curtains are hung on the roller suspension rings and the pulley suspension rings; the requirement that a cloth curtain and a yarn curtain are hung at the same time in a common family is met, the curtain hung on the idler wheel hanging rings covers the lower half portion of the track, and the problem of light leakage between the track and the curtain in the prior art is solved synchronously.

The utility model provides an electric can opener which comprises a cutting wheel, a cutting knife, a driving wheel, a main shaft, an eccentric part, a movable part and an idle wheel, the cutting wheel, the driving wheel and the eccentric part are all arranged on the main shaft in a sleeved mode, the driving wheel drives the cutting wheel to rotate through the main shaft, the eccentric part is movably connected with the movable part, and the cutting knife is connected to the movable part. The driving wheel can drive the movable part to do linear reciprocating motion so as to drive the cutting knife to be close to or away from the cutting wheel, the idle wheel is arranged on one side of the driving wheel and the eccentric part, and the driving wheel drives the eccentric part to rotate through the idle wheel; an elastic positioning ball and a groove are arranged between the eccentric part and the driving wheel, and one end of the elastic positioning ball can be embedded into the groove, so that the eccentric part can move along with the driving wheel; the eccentric part is driven to rotate through dual drive, and in-place feeding and successful cutting are guaranteed.

A kinetic energy distribution transmission mechanism with double-drive control and double joints comprises a first drive device, a second drive device, a first joint arm, a second joint arm and a third joint arm, and a first idle wheel structure and a second idle wheel structure are rotationally arranged on a second joint shaft structure. A first driving wheel structure and a second driving wheel structure are arranged on the first joint shaft structure and are fixedly connected with the first joint arm; the first driving device is in transmission connection with the first idle wheel structure and the first driving wheel structure in sequence through a first rotary transmission pair, the second driving device is in transmission connection with the second idle wheel structure and the second driving wheel structure in sequence through a second rotary transmission pair, and the rotating directions of the second idle wheel structure and the second driving wheel structure are different. According to the utility model, sufficient kinetic energy can be provided, higher peak torque can be realized, the energy consumption in the overall movement process is lower, the manufacturing cost is lower, and the occupied overall space and mass are lower.

The utility model discloses a narrow-gap electromagnetic drive inspection robot device which comprises a frame, magnetic wheel sets are installed on the two sides of the frame respectively, an image module is installed at the front end or the rear end of the frame, a supporting module is installed on the frame, the supporting module comprises supporting idler wheels, and the supporting idler wheels are elastically installed on the frame. By means of the magnetic wheel sets installed on the two sides of the frame and the supporting module installed on the frame, the robot can walk longitudinally and stably in a narrow gap between a generator set stator and a rotor, and an operator can conduct nondestructive testing on the surface of the generator set stator through the image module.

The utility model relates to a resin storage tank which comprises a tank body, a cover plate is installed on the top of the tank body, a plurality of L-shaped supporting plates are evenly installed on the circumference of the included angle between the bottom and the side wall of the tank body, idler wheels and adjustable supporting legs are installed at the bottoms of the horizontal side edges of the supporting plates in a staggered mode respectively, and anti-collision buffer blocks are installed on the outer sides of the vertical side edges of the supporting plates. A plurality of adjacent heating pipes are arranged in the inner wall of the tank body from top to bottom, the section of the cover plate is in an inverted U shape, the inner wall of the vertical side edge of the cover plate is rotationally connected with a rotating disc, a rotating shaft is installed in the center of the rotating disc, a motor for driving the rotating shaft to rotate is installed at the top of the cover plate, a plurality of through holes are formed in the rotating disc, and a breather valve is installed at the top of the cover plate. A plurality of stirring rods and heating rods are uniformly distributed on the circumference of the turntable, the stirring rods and the heating rods are arranged in a staggered manner, the stirring rods are different in length and are hollow, temperature sensors are arranged in the stirring rods, and probes of the temperature sensors penetrate out of the bottoms of the stirring rods. The resin storage device is convenient to carry, uniform in temperature heating and good in resin storage effect.

The invention relates to a blade grinding device and an automatic grinding method, and solves the problems of high labor intensity, low efficiency and poor consistency of a method for completely grinding weld beading manually. The driving wheel drives the abrasive belt to rotate so as to drive the contact wheel to rotate, the limiting wheels are arranged on the two sides of the contact wheel, the inner support and the outer support achieve radial positioning and relative movement of the limiting wheels through the gap C. The linear electric cylinder adjusts the telescopic distance of the limiting wheels through the inner support, and fine adjustment of the distance between the blade base body and the abrasive belt is achieved through adjustment. Therefore, the step allowance after weld beading polishing is adjustable and controllable, the distance adjusting function of the linear electric cylinder is integrated in the PLC, and automatic control is facilitated. And when the robot clamps the blade for grinding, the rigid contact wheel of the abrasive belt rotates to grind and remove the blade weld beading. The linear guide rail and the air cylinder achieve floating in the polishing process of the whole device, and even if the robot gives a large feeding amount, the blade cannot be damaged. The sliding block adjusts the idle wheel to move up and down, and tightness of the abrasive belt is adjustable. And the floating polishing device is fixed by the fixing seat.

The utility model relates to the field of heat exchange units, and discloses a series plate type heat exchange unit which comprises a rack, the rear end of the upper surface of the rack is fixedly connected with a moving mechanism, the moving mechanism comprises a fixing rod, and the upper end of the outer wall of the front end of the fixing rod is fixedly connected with an upper transverse rod. A lower transverse rod is fixedly connected to the lower end of the outer wall of the front end of the fixing rod, a sliding groove is formed in the rear end of the upper surface of the lower transverse rod, and a hydraulic cylinder is arranged in the fixing rod. According to the device, the hydraulic cylinder is arranged, the heat exchanger of the device can be directly moved out through the hydraulic cylinder, the heat exchanger can be integrally removed through the idler wheels and the sliding grooves at the lower end of the fixing plate, then the heat exchange plate can be disassembled, maintained and replaced, after maintenance is completed, the hydraulic cylinder is started, and the heat exchanger can be pushed back to the original position; and the pipeline and the connecting flange only need to be fixed again, so that the working burden of a user can be reduced, and the use convenience of the equipment is also improved.

The invention discloses a supporting stand column locking type submarine cable rotating disc system for a deep and far sea workboat. The supporting stand column locking type submarine cable rotating disc system comprises a rotary cable bearing disc, a cable disc supporting and fixing system, a pressure-bearing stand column locking device and a stand column jacking hydraulic cylinder. According to the system, static / dynamic loads of a full-load cable tray are directly transferred to a ship body pressure-bearing deck under the severe sea condition through a supporting stand column locking mechanism, and overload damage of a traditional hydraulic supporting roller is avoided. And the rotary cable bearing disc is provided with a liftable cable disc rotary mechanism, so that the cable disc is lifted to be separated from the supporting rollers in a locking stage and is rigidly fixed by the pressure-bearing upright column locking device. According to the system, rapid locking and unlocking can be achieved, the state switching time of the workboat is remarkably shortened, the deep and far sea operation efficiency is improved, and meanwhile hydraulic system failure and idler wheel fatigue damage caused by long-term pressure bearing are avoided. The device is suitable for transportation and laying operation of ten-thousand-ton submarine cables, and has high safety and reliability.

The utility model discloses a laser welding jig for a water tank, and relates to the technical field of welding auxiliary jigs. The device comprises a bottom plate, a follow-up base is arranged on the top face of the bottom plate, an idle wheel mechanism is fixedly installed on the top face of the bottom plate, a driving mechanism seat is arranged on the top face of the bottom plate, a driving wheel mechanism is movably inserted into the driving mechanism seat, and a clamping mechanism is fixedly installed on the end face of the driving mechanism seat. The end face of the circular water tank is pressed through the spinning pressing mechanism, the rolling wheel part of the driving wheel mechanism is driven by the driving mechanism to rotate, the rolling wheel part rotates the circular water tank under the action of friction force, meanwhile, the circular water tank is welded through the laser welding gun, and after welding is completed, the circular water tank is welded through the laser welding gun. And the driving mechanism stops driving the rolling wheel part of the driving wheel mechanism to rotate, the clamping mechanism drives the driving wheel mechanism to move backwards, the circular water tank is loosened, and the circular water tank can be taken out.

The utility model relates to the technical field of curtain rails, in particular to a three-rail-in-one curtain rail and an assembly, which comprise a rail, a sealing piece, a mounting weight, rollers and pulleys, the rail adopts the design of one rail, three grooves and two open ends, a plurality of pulleys are arranged in the pulley grooves at the bottom of the rail at intervals, and a plurality of rollers are arranged in the two roller grooves in the middle of the rail at intervals. The roller suspension arms of the rollers of the two roller grooves in the middle of the rail transversely extend out of the groove openings of the roller grooves in the reverse direction, and the roller suspension arms are suspended and do not make contact with the rail, so that the roller suspension rings located on the two sides of the rail and the roller suspension rings at the bottom of the rail keep enough distance, and three layers of curtains do not make contact with one another to affect use after the curtains are hung on the suspension rings. The purpose that three layers of curtains are hung on one rail at the same time is achieved, the lower half portion of the rail is covered with the curtains hung on the idler wheel hanging rings, and the problem of light leakage between the rail and the curtains in the prior art is synchronously solved.

The utility model discloses a semi-rigid spiral centralizer, which relates to the field of centralizers and comprises a centralizer main body, a movable opening is arranged inside the centralizer main body, a threaded rod is movably connected inside the movable opening, and the semi-rigid spiral centralizer further comprises a synchronous shifting component, a spiral shaft and a spiral shaft, an adjusting assembly; and a support assembly. The shifting block is shifted to drive the gear ring to rotate, the gear ring rotates to adjust the gear connected with the gear ring in a meshed mode to rotate, then the threaded rod is driven to rotate, and the two vertically-symmetrical movable plates in threaded connection with the two sections of threads with different thread directions of the outer ring of the threaded rod move oppositely at the moment. The two movable plates move in the opposite directions, the inclined plates abut against the idler wheels to enable the idler wheels to move, in this way, the two symmetrically-arranged idler wheels move in the opposite directions or move away from each other to be matched with pipe sleeves which are inserted into the centralizer body and are different in size, and it is guaranteed that the application range of the centralizer body is larger.

The invention relates to the technical field of automobile parts, in particular to a same-direction transmission line gear pair and a differential mechanism, which comprise a driving line gear and a driven line gear, contact lines of the driving line gear and the driven line gear are meshed according to a space conjugate curve, the driving line gear and the driven line gear have the same movement direction, and the driving line gear and the driven line gear are meshed according to a space conjugate curve. The contact lines of the driving line gear and the driven line gear are cylindrical spiral lines, and the spiral directions of the cylindrical spiral lines are the same. Linear gear transmission is adopted, external meshing and homodromous transmission can be achieved without adding an idle gear, the machining cost is reduced, the structure is compact, and assembling is convenient.

The invention relates to the technical field of food packaging machinery, in particular to a carrot juice powder solid beverage production line packaging machine which comprises a workbench, a conveying belt is installed at the upper end of the workbench, an operation box is fixedly connected to the upper end of the workbench, and a buffer tank is slidably connected to the inner side of the operation box; a first support is fixedly connected to the position, close to one side, of the upper end of the operation box, a first motor is installed at the upper end of the first support, a second support is fixedly connected to the position, close to the other side, of the upper end of the conveying belt, a cleaning mechanism is installed at the upper end of the second support, and a feeding mechanism is installed on the outer side of the buffer tank. Through cooperation of the first gear, the second gear and the outer gear ring, the buffer tank and the discharging auger rod can rotate oppositely, so that the packaging speed is increased, when the buffer tank rotates, the idler wheels and the protruding blocks interact, the buffer tank shakes, carrot powder blockage is avoided, vibration feeding and a screw conveying system work cooperatively, and it is ensured that powder flows evenly.

The utility model discloses a working face belt conveyor telescopic conveying device which comprises a plurality of belt telescopic devices, a guide rail pushing device and a machine body traction device and is connected with two parallel bearing guide rails through lifting oil cylinders, idler wheels and guide rail hydraulic clamping devices. Adjacent fuselage telescopic devices are connected and fixed through multiple pairs of telescopic hinges, the number of the hinges is adjustable, and different telescopic distance requirements are met. The belt telescopic device is provided with an upper carrier roller assembly, a lower carrier roller assembly, and an oil cylinder, a roller and a guide rail hydraulic clamp which are used for the guide rail pushing device; the guide rail pushing device comprises a pushing oil cylinder, a pushing oil cylinder sliding end, a bearing guide rail and a guide rail hydraulic clamping device. The machine body traction device is mainly composed of a traction mechanism connecting frame, a hydraulic motor, a traction roller, a traction rope and the like and used for unfolding the belt conveyor folding machine body.

The utility model discloses a multi-connecting-rod transmission mechanism of a gate-type two-point press machine in the field of press machines, which comprises a press machine body, two parallel and equal-height crankshafts are rotatably arranged on the press machine body, and a first bearing seat and a second bearing seat are arranged on the press machine body corresponding to a main transmission shaft. An eccentric shaft hole allowing the front end of the main transmission shaft to penetrate through is formed in the first bearing seat, the rear end of the main transmission shaft penetrates through the second bearing seat and is sleeved with a main gear, one side of the main gear is in transmission connection with a driving gear at the rear end of one crankshaft through an idle gear, and the other side of the main gear is in meshed connection with a driving gear at the rear end of the other crankshaft. A large gear is rotatably arranged on the periphery of the first bearing seat, the large gear is in transmission connection with a rotation driving mechanism, and a multi-connecting-rod mechanism connected with the main transmission shaft is arranged on the large gear. According to the utility model, the phenomenon that the dot distance between the two crankshafts is too small is avoided, and the unbalance loading resistance is stronger.

The utility model provides a liquid cooling plate copper flow channel bending device which comprises two side supporting plates, idler wheel inserting grooves are formed between the side supporting plates, front supporting idler wheels are installed on the surfaces of the idler wheel inserting grooves, the number of the idler wheel inserting grooves is two, and a rear supporting idler wheel is connected to the surface of the other idler wheel inserting groove in an embedded mode. And a lifting pressing wheel is arranged on the upper surface of the side supporting plate, a driving crank is arranged on the surface of the lifting pressing wheel, and an anti-bending mechanism is arranged on one side of the lifting pressing wheel and used for solving the problems that a liquid cooling plate copper runner, namely a copper pipe, cannot be protected in the bending process, and the copper pipe cannot be bent in the bending process when the bent copper pipe is bent. And the problem that the pipe wall is broken due to an overlarge bending angle exists.

The utility model belongs to the technical field of seats, and particularly relates to a lead screw long sliding rail gap eliminating structure which comprises an upper rail and a lower rail with an inverted T-shaped groove, and idler wheels arranged on the lower portion of the upper rail can roll in the T-shaped groove of the lower rail. Bearings capable of being in elastic rolling abutting connection with the inner upper wall of the T-shaped groove and eliminating gaps are arranged on the two side faces of the upper rail in the T-shaped groove in the length direction at intervals respectively. The gap eliminating structure has the advantages of being simple in structure, reasonable in space layout, good in gap eliminating performance and suitable for the seat sliding rail.

The utility model belongs to the field of paperboards, and particularly relates to a positioning tool for paperboard slotting, which comprises two mounting seats, two guide rods are fixedly mounted between the two mounting seats, two adjusting seats are sleeved on the two guide rods in a sliding manner, and positioning plates for paperboard positioning are fixedly mounted on the sides, close to each other, of the two adjusting seats; a first threaded hole is formed in the rear side of the adjusting seat, a locking screw is installed in the first threaded hole in a threaded mode and matched with the guide rods, a rotary knob is fixedly installed at the rear end of the locking screw, two fixing seats are fixedly installed on the two guide rods, and positioning seats are installed on the front sides of the fixing seats. A locking mechanism is arranged between the positioning seat and the fixing seat, an adjusting plate is installed on the top of the positioning seat, and an adjusting mechanism is arranged between the adjusting plate and the fixing seat. The paperboard positioning tool is reasonable in design, the purpose of positioning different paperboards can be achieved through adjustment and fixation of the positioning plate, the positioning base and the idler wheels, and therefore the applicability of the positioning tool can be improved.

The utility model discloses a television shell injection mold, relates to the technical field of television production, and aims to solve the problems of low production efficiency caused by poor cooling effect of the television shell injection mold and inconvenience in demolding caused by the fact that the molded television shell is easily adhered to the inner wall of a molding groove. A lower mold is fixedly connected to the center of the top face of the base, a heat dissipation mechanism is arranged on the outer wall of the left side of the base, and a demolding assembly is arranged in the lower mold. After ice blocks are added into the screen frame, the cooling fan blows cold air to the lower mold and the upper mold, cooling and curing of a television shell in the mold are accelerated, the bearing base is pushed to move through the push rod, the idler wheels rotate to extrude the inclined plate, and the inclined plate drives the ejector rod to eject out and demold the television shell in the lower mold. The problems that the production efficiency is low due to the poor cooling effect of the television shell injection mold, and demolding is inconvenient due to the fact that the formed television shell is prone to adhering to the inner wall of the forming groove are effectively solved.