63results about How to "Realize gap adjustment" patented technology

The invention discloses a two-roll horizontal mill, which comprises a mill base, a mill frame, an upper roller and a lower roller (3, 2) and a roller gap adjusting mechanism, wherein the upper roller and the lower roller (3, 2) are arranged in the mill frame and are parallel to each other. The two-roll horizontal mill is characterized in that four angles at the upper end of the mill base are provided with an upright post respectively; the mill frame is a floating frame (11) and is positioned among the four upright posts; the upper end part of each upright post is provided with a roller gap centering mechanism for controlling the floating frame (11) to vertically move relative to the upright posts; and a lower roller bearing block (1) is arranged on a lower crossbeam of the floating frame (11). When a gap between two rollers is adjusted, the roller gap between the two rollers can be automatically centered. The equipment is simplified, low in manufacturing cost, convenient to maintain and high in operating rate and can be used for continuously rolling rectangular steel, pipes, bars and sections.

The invention aims at providing a walnut shell and meat separator which is driven by a motor and has an adjustable shell and meat separating gap. A shelled walnut shell and meat mixing body is separated by adjusting the gap, power is distributed to two points by a reducing motor through a duplex chain wheel, the power of one point is used for driving a separation ring to rotate, and the power of the other point is used for driving a central shaft to rotate. After the shelled walnut enters a shell and meat separating ring body, the shell and meat body is continuously thrown to a certain height and then falls freely by the rotation of the ring body; when falling, the shell and meat body is continuously knocked and collided by screw teeth which rotate around the central shaft, the combined shells and meat are separated finally, and large shells are transmitted into a large shell discharging hopper. The suitable separating ring gap can be adjusted by a screw rod distance regulator, and the walnut meat can totally leak under the gap in an optimal effect and is collected in an aggregate hopper so as to complete a shell and meat separating process.

The invention belongs to the field of potato harvesters, and particularly relates to a folded parallel-connection adjustment soil removal and impurity removal device for a potato harvester. The devicecomprises a rack, multiple sets of soil removal and impurity removal units and multiple adjustment mechanisms; each set of soil removal and impurity removal unit comprises a first soil removal roller, a second soil removal roller and a flat roller which are arranged between two vertical plates (1); in each set of soil removal and impurity removal units, the first soil removal roller is located infront of the second soil removal roller, the flat roller is located behind the second soil removal roller, and the axis of the second soil removal roller is located above and behind the axis of the first soil removal roller; each first soil removal roller comprises a first soil removal shaft (3) and a first soil removal wheel (4), and each second soil removal roller comprises a second soil removal shaft (6) and a second soil removal wheel (7); each set of adjustment mechanism comprises a supporting base (11), a supporting arm (12), an adjustment plate (13) and an adjustment rod (15). The folded parallel-connection adjustment soil removal and impurity removal device for the potato harvester is high in soil removal efficiency and impurity removal effect, helps to improve the potato-soil separation efficiency and harvesting quality, and improves the adaptability of the potato harvester to different land parcels.

An elevator hoist, wherein mechanisms for adjusting a gap between linings formed so as to come into contact with and separate from a brake drum and the brake drum when the linings are separated from the brake drum are installed in an arms for supporting the linings, whereby the adjustment of the gap between the linings and the brake drum can be performed easily in a short time.

The invention relates to a two roller upright rolling mill, which comprises a rolling mill base, a rolling mill rack, two upright mill rollers (3, 2) and a mill roller clearance regulating mechanism, wherein the two upright mill rollers (3, 2) are arranged inside the rolling mill rack in parallel; the rolling mill base (5) comprises an upright end plate (5-1) and horizontal transverse beams (5-2) which are connected with four angles of the upright end plate (5-1) respectively; the horizontal transverse beams (5-2) are vertical to the upright end plate and extend towards the same direction; the rolling mill base is a floating type rack (11) which is embedded among the four horizontal transverse beams of the rolling mill base; the mill roller clearance regulating mechanism is arranged at the transmission side or the operation side of the rolling mill; and a roller gap centering mechanism is also arranged at the same side with the mill roller clearance regulating mechanism. While the two mill rollers are subjected to clearance regulation, the roller gap between the two mill rollers is centered automatically; the device is simple and convenient to operate and maintain; and the rollers can be exchanged conveniently and rapidly.

The invention relates to a radial distributed adjustable permanent magnetic safety coupler and a permanent magnet unit. A conductor assembly is arranged on the inner circumference of a coupler drivingdisc; a permanent magnet assembly is arranged on the outer circumference of a driven disc; the permanent magnet assembly consists of a plurality of permanent magnet units; a centrifugal mechanism isarranged on each permanent magnet unit; the conductor assembly and the permanent magnet assembly rotate relatively to generate a magnetic field, and the centrifugal mechanisms are switched between anopen state and a closed state so as to regulate a size of a gap between each permanent magnet unit and the conductor assembly; each permanent magnet unit comprises a limiting plate, a magnet fixing frame and a permanent magnetic block; and one side of each limiting plate is connected with the corresponding centrifugal mechanism and the other side of the limiting plate is connected with the corresponding magnet fixing frame. According to the invention, by arranging the permanent magnet units in a radial circumference distribution mode, a torsion is guaranteed to be regulated according to a rotating speed in the running process of the permanent magnetic safety coupler, uniformity of a moment is improved, a soft starting rate also can be regulated according to actual demands, transmission impact to a load end is effectively avoided, the application range is enlarged, and a protection effect is taken.

A roller-type screening machine convenient to regulate its gap for preparing the metallurgical balls is composed of screening rollers and their driver, axle coupling, machine base, connection plate linked with machine base via slide screw blots with slide block and tubular sleeve, drive axle's holder fixed to said connection plate, driven axle's holder, gap regulating mechanism, and limiting mechanism.

The invention discloses a brake with a self-compensation function and a braking method of the brake, and belongs to parking braking equipment. The brake comprises a brake disc and brake units arranged on the two sides of the brake disc, each brake unit comprises baffles, a piston, an adjusting taper sleeve, a piston push rod and a friction plate, a caliper body and the baffles form an annular mounting space, a piston can axially moving left and right along the annular mounting space, the adjusting taper sleeve is arranged on the side, away from the baffles, of the inner surface of the piston in a sleeving mode and can be kept expanding or contracting in the radial direction of the mounting space, one end of the piston push rod is mounted on the adjusting taper sleeve in a sleeving manner, the piston push rod is in clearance fit or interference fit with the adjusting taper sleeve, and the friction plate is connected with the other end of the piston push rod and is suitable for pressing the brake disc. The brake belongs to a fixed parking brake, the pressing force of a disc spring is completely converted into the parking braking force through hydraulic oil return, and due to the fact that the parking braking force is not consumed by other parts, the braking efficiency is high, an external power source is not needed, and automatic abrasion compensation can be achieved.

The invention discloses an arc-shaped lock capable of adjusting a gap between every two adjacent LED display screens. The arc-shaped lock comprises a first housing and a second housing, wherein a first connector which is in sliding connection with the first housing is arranged in the first housing; a second connector which is in sliding connection with the second housing is arranged in the second housing; a regulating rotary plate used for adjusting a gap between the first connector and the second connector is arranged between the first connector and the second connector; and a hasp assembly for locking the first connector and the second connector is arranged on the upper part of the first connector and the upper part of the second connector. The rotary plate can be adjusted to realize gap adjustment between the first connector and the second connector, so that gap adjustment between the first housing and the second housing is realized. The arc-shaped lock capable of adjusting the gap between every two adjacent LED display screens is simple in structure, is high in reliability, can adjust the gap between the first connector and the second connector, and also can correct misplacement between the first connector and the second connector.

The invention relates to an ultra-fine pulverizer for feed processing, which comprises a base, on which a main shaft is supported and installed, both ends of the main shaft are supported and installed on the base by bearing seats, an upper box is fixedly installed on the base, and an upper box is fixedly installed on the main shaft. A hammer frame is installed, and the hammer head is hinged on the hammer frame through the pin shaft of the hammer head. A grate bar is installed inside the box of the base. The left end of the grate bar is hinged inside the base through the grate bar hanging pin, and the right end of the grate bar is supported by an adjustment pin. , the right end of the grating bar is installed with a grating bar adjustment mechanism; the inside of the upper box is equipped with a counterattack plate, a lining plate and an adjustable counterattack plate, and the adjustable counterattack plate is connected with the counterattack plate adjustment mechanism. This ultra-fine pulverizer can effectively pulverize the aggregate of the grain, improve the pulverization efficiency, reduce the energy consumption of the equipment, reduce the noise of the equipment, and reduce the labor intensity of the operators.

The invention discloses a peanut harvester, which comprises a frame, a support frame, the rear part of the frame is connected with the front part of the support frame, the middle part of the frame is provided with walking wheels, the front part of the frame is provided with a gearbox, and the The front end is provided with a passive pulley, the input shaft of the gearbox is connected with the rear output shaft of the tractor, the output shaft of the gearbox is provided with an output sprocket, the output sprocket and the passive sprocket are connected by a chain, and the passive sprocket is set on the transmission shaft , there is also a driving gear on the transmission shaft, a driven gear in the middle of the frame, a driving pulley on the connecting shaft, and a driven sprocket II on the connecting shaft; the support frame is equipped with a laying device, and the driven chain Wheel I is connected with driven sprocket II by laying chain. Harvesting saves labor and effort, and has high efficiency. When harvesting peanuts, the plastic film is not cut or broken, which facilitates the subsequent recycling of the plastic film and reduces white pollution.

The invention relates to the technical field of dampers, in particular to an eddy current damper and an eddy current tuned mass damper. The eddy current damper comprises a plurality of permanent magnets mounted on magnet mounting plates and a conductor plate mounted on a second end plate, the conductor plate is positioned between the magnet mounting plates, wherein the magnets at two sides of theconductor plate have opposite polarities, the magnet mounting plates are mounted on two side supporting plates, the side supporting plates are mounted on a same side of a first end plate, a rib plateis arranged between the side supporting plates, linear bearings are arranged on the rib plate and the first end plate respectively, a guide rod is arranged on the second end plate, and the guide rod penetrates through the rib plate and the linear bearings to connect the first end plate and the second end plate into a whole. The tuned mass damper comprises one or more of the eddy current dampers. In order to overcome the defects in the prior art, the problems that an existing damper is large in magnetic flux leakage and inconvenient for adjusting the damping coefficient are solved, and production and assembly are convenient.

The invention discloses an online overload clearance fine adjustment device for an ultra-wide PC sheet forming machine. The online overload clearance fine adjustment device comprises a lifting machineand a motor. One end of a shaft of the lifting machine is connected with a shaft of the motor through a worm and gear mechanism, and the other end of the shaft of the lifting machine is connected with a screw rod through a reduction gear mechanism. The stretching end of the screw rod is matched with a lifting arm in a threaded manner, a nut is arranged at the lower end of the lifting arm, and theupper end of the lifting arm is fixedly connected with a wedge block. The screw rod stretches in a guide groove extending in the axial direction in the lifting arm, and the top end of the screw rod is movably connected with a rectangular guide block. The rectangular guide block is circumferentially limited in the guide groove in a clearance fit manner, and a dovetail-shaped guide rail is arrangedon the straight face of the wedge block. The dovetail-shaped guide rail is matched with a dovetail groove formed in the linear sliding block in a sliding manner, and the linear sliding block is usedfor being fixedly installed on a bearing seat of a fixed roller of the PC sheet forming machine. The slope of the wedge block is matched with the slope of a slope sliding block in a sliding manner, the slope sliding block is used for being fixedly installed on a bearing seat of a movable roller of the PC sheet forming machine, and the lifting arm conducts lifting motion so that the distance between the linear sliding block and the slope sliding block can be adjusted.

The invention relates to an electric vehicle underground garage center conveying table assembly which comprises two rotating guide rails arranged in parallel. A lifting synchronous belt is installed on the rotating guide rails in a cycle mode. A conveying table driven by the lifting synchronous belt is arranged between the rotating guide rails. The conveying table comprises a transverse frame, a guide rail sliding base and a two-layer vehicle bearing device. The two ends of the transverse frame are provided with a guide rail sliding base running on the rotating guide rails in a guided mode. The two-layer vehicle bearing device is horizontally and perpendicularly installed on the transverse frame. An upper vehicle carrying frame, an upper vehicle trailing frame, a lower vehicle carrying frame and a lower vehicle trailing frame are installed on a two-layer guide rail frame of the two-layer vehicle bearing device, the upper vehicle trailing frame and the lower vehicle trailing frame are hung together or disengaged through a hook mechanism, the upper vehicle carrying frame and the lower vehicle carrying frame are hung together or disengaged through a hook mechanism, and the guide rail sliding base is fixedly connected with the lifting synchronous belt. The electric vehicle underground garage center conveying table assembly of the structure is applicable to storing vehicles such as electric vehicles with large weight, and has the advantages of being large in bearing weight, stable in structure, safe and reliable.

The invention provides a film pasting mechanism for upper and down surfaces of aluminium profiles and belongs to the technical field of film pasting for the aluminium profiles. The film pasting mechanism comprises a left-right guide assembly, an upper film pasting assembly and a lower film pasting assembly, wherein supporting blocks of the left-right guide assembly are symmetrical and can be arranged on a supporting seat in a left-right sliding manner; the supporting blocks are connected with two sections of threads of a screw rod; the two sections of rotation directions of the screw rod are opposite; a left-right hand wheel is arranged at one end of the screw rod; a left-right guide roller can be arranged on the supporting blocks in a rotation manner; each of the upper film pasting assembly and the lower film pasting assembly comprises an upper pressing roller and a lower pressing roller; the upper pressing rollers are positioned right above the corresponding lower pressing rollers; the lower end of an adjusting screw rod is connected with an upper pressing roller bracket; an up-down hand wheel is arranged at the upper end of the adjusting screw rod; the adjusting screw rod is in threaded connection with a supporting bracket; the upper film pasting assembly also comprises an upper film winding-up roller bracket and an upper film winding-up roller; the upper film winding-up roller can be arranged on the upper film winding-up roller bracket in the rotation manner; the lower film pasting assembly also comprises a lower film winding-up roller; the lower film winding-up roller can be arranged on a rack in the rotation manner. By using the film pasting mechanism, the film pasting for the upper and lower surfaces of the aluminium profiles of multiple specifications can be realized, and the applicability is high.

The invention discloses a rotary printing online punching device which comprises a first side plate, a second side plate, an upper connecting rod, a lower connecting rod, an upper mold shaft, a lower mold shaft, an upper mold, a lower mold, shaft sleeves, an adjusting mechanism and transmission gears. The first side plate and the second side plate are arranged in parallel. The two ends of the upper connecting rod are fixedly connected with the upper portion of the first side plate and the upper portion of the second side plate respectively, and the two ends of the lower connecting rod are fixedly connected with the lower portion of the first side plate and the lower portion of the second side plate respectively. The upper mold shaft and the lower mold shaft are installed on the first side plate and the second side plate with the upper axis and the lower axis in parallel. The upper mold shaft and the lower mold shaft are connected with the first side plate and the second side plate through the shaft sleeves, and one end of the upper mold shaft and one end of the lower mold shaft are meshed together three the two transmission gears. The rotary printing online punching device is convenient to operate, simple in structure, high in efficiency and precision and wide in applicability.

The invention discloses a power cable winding device which comprises a rack and a winding assembly arranged on the rack, and the rack is composed of a supporting plate and a rack bottom plate; the winding assembly comprises a supporting device rotationally installed on the supporting plate and a winding shaft sleeve arranged on the periphery of the supporting device in a sleeving mode, the supporting device comprises a supporting rotary disc, a supporting stop rod and a supporting stop block, and the supporting rotary disc is in linkage with the driving device and is fixedly connected with thesupporting stop rod; a rectangular groove is formed in the supporting stop rod, and a pushing device rotationally connected with the supporting stop block is installed in the rectangular groove; andthe pushing device comprises a supporting push rod and two groups of supporting connecting rods. According to the power cable winding device, the supporting stop rod and the supporting stop block arematched with the supporting push rod and the supporting connecting rods, a fixed supporting plate and a movable supporting plate are matched with telescopic rod, rapid clamping and dismounting of winding shaft sleeves with different diameters and lengths can be achieved, the flexibility is high, and the application range is wide.

The invention aims at providing a walnut shell and meat separator which is driven by a motor and has an adjustable shell and meat separating gap. A shelled walnut shell and meat mixing body is separated by adjusting the gap, power is distributed to two points by a reducing motor through a duplex chain wheel, the power of one point is used for driving a separation ring to rotate, and the power of the other point is used for driving a central shaft to rotate. After the shelled walnut enters a shell and meat separating ring body, the shell and meat body is continuously thrown to a certain heightand then falls freely by the rotation of the ring body; when falling, the shell and meat body is continuously knocked and collided by screw teeth which rotate around the central shaft, the combined shells and meat are separated finally, and large shells are transmitted into a large shell discharging hopper. The suitable separating ring gap can be adjusted by a screw rod distance regulator, and the walnut meat can totally leak under the gap in an optimal effect and is collected in an aggregate hopper so as to complete a shell and meat separating process.

The invention discloses a multi-layer rotating disc thin-layer type chemical reactor and a using method thereof. The chemical reactor comprises a shell; an outer fixed disc is fixedly arranged in theshell; at least one discharge hole is formed, a rotating shaft is arranged in the center of an inner cavity of the outer fixed disc, a plurality of layers of inner rotating discs are fixed on the rotating shaft, the inner rotating discs are gap type cavities which are consistent with the inner rotating discs and the rotating shaft in shape, and the outer fixed disc inner cavity and the inner rotating discs are used for mixing materials of all phases and have narrow gaps; the upper surface and the lower surface of the inner rotating disc are both inclined faces inclining outwards from the rotating shaft. The inner rotating disc and the outer fixed disc are matched to form a narrow zigzag cavity to form a Z-shaped or S-shaped mixing chamber, so that the reaction surface area is increased, the reaction time is prolonged, the mass transfer rate is increased, and the reaction rate is increased; according to the invention, two operation modes of forward flow and reverse flow can be realized,especially under the condition of large specific gravity difference, the reverse flow operation can be realized, and the separation or reaction efficiency is improved.

The invention provides a second-grade separator in the technical field of grain separation machinery. The second-grade separator comprises an upper shell and a lower shell; a feed port is formed in the top of the upper shell; the upper shell is connected with a feeding wheel capable of rotating; a feeding groove is formed in the feeding wheel; multiple arranging plate sets are arranged in the upper shell in the height direction; materials in the feeding groove fall onto the arranging plate sets; the arranging plate sets comprise left arranging plates and right arranging plates; the bottoms ofthe left arranging plates extend to one ends of the right arranging plates; the ends of the right arranging plates extend to the left arranging plates of the next arranging plate sets; first air waysare formed between the adjacent right arranging plates; an air sucker is arranged at the top of the upper shell; an air sucking port of the air ducker communicates with the upper shell; the upper shell rightly below the air sucking port is connected with a conveying mechanism; two screen frames capable of swinging are arranged in the lower shell in the height direction; screens and impurity platesare connected to the screen frames from top to bottom, and are downwards inclined; and the lower shell is provided with a separation module capable of rotating. The second-grade separator is high inworking efficiency and excellent in grain cleaning effect.

The invention discloses a pipe laser cutting machine, which relates to the field of laser cutting devices, and comprises a workbench, a feeding conveying mechanism, a guide mechanism, a laser cutting device and a control mechanism, the feeding conveying mechanism is arranged on the upper portion of the workbench, the guiding mechanism is arranged on one side of the feeding conveying mechanism and used for clamping a pipe to be cut, and the laser cutting device is arranged on the upper portion of the guiding mechanism and used for cutting the pipe. The control mechanism is arranged on one side of the workbench and electrically connected with the feeding conveying mechanism and the laser cutting device, the pipe feeding rate is guaranteed, pipe positioning is facilitated, pipe deviation is prevented, the pipe machining quality is improved, and pipe machining and cutting can be achieved through the laser cutting device.

The invention discloses a paper drawing machine with a rebound type cutter structure, which comprises a machine body, wherein the upper part of the machine body is provided with a paper towel chamber;the lower part of the machine body is provided with a machine core; the machine core comprises a placing frame fixed on the machine body; two sides of the upper end of the placing frame are providedwith supporting plates; a first roller shaft and a third roller shaft positioned below the first roller shaft are arranged between the two supporting plates; the left side and the right side of the supporting plates are respectively provided with a first rotating plate and a second rotating plate; both ends of the first rotating plate and the second rotating plate are bent downwards to form a bending part; the bending part is rotationally connected with the outer wall of the placing frame; the two sides of the upper ends of the first rotating plate and the second rotating plate are respectively provided with left supporting plates and right supporting plates; the left supporting plate, the supporting plate and the right supporting plate on the same side are arranged side by side; a secondroller shaft and a fourth roller shaft are respectively arranged between the left supporting plates and between the right supporting plates. The paper drawing machine aims to solve the problem that the paper towels are inconvenient to pass through gaps between rollers after the roll paper in a paper towel machine is replaced.

The invention provides an annular track crane which comprises an annular track, an annular frame and a crab. The annular frame is matched with the annular track. The crab is fixedly connected with theannular frame and can operate along the annular track. The annular frame is connected with a horizontal wheel set through a horizontal wheel set support, the horizontal wheel set support comprises aconnection portion and a support flange, the connection portion is fixed to the annular frame, the connection portion and the support flange are rotationally connected, the horizontal wheel set comprises a rotating shaft, a horizontal wheel and a connection flange, one end of the rotating shaft is rotationally connected with the horizontal wheel, the other end of the rotating shaft is eccentrically connected with the connection flange, and the connection flange and the support flange are fixedly connected. When the horizontal wheel is abraded when used for a long time, and the support flange is rotated so as to drive the connection flange to rotate. Since the rotating shaft and the connection flange are eccentrically arranged, the gap between the horizontal wheel and the track can be adjusted by rotating the connection flange, and therefore the crab is prevented from track biting or track disengagement.

The invention discloses equipment for recycling cadmium in soil through a mulberry. The equipment comprises a rod peel stripping device and a separating and screening device at the lower end of the rod peel stripping device. The rod peel stripping device is internally provided with rotary rollers, and the rollers comprise a forward-adverse roller, feeding rollers, stripping rollers and discharging rollers; the outer walls of the rollers are provided with stretchable tender peel knife sets and coarse peel knife sets; each tender peel knife set comprises an interlayer blade and an inner layer blade; tool points of the interlayer blades are uniformly provided with large arc grooves; the inner layer blades are uniformly provided with small arc grooves; tool points of the coarse peel blades are in saw shapes; a shell of the separating and screening device is internally provided with an inner cavity sleeve; the upper end of the inner cavity sleeve is provided with a screening plate; the inner cavity sleeve is internally provided with a telescopic shaft; the telescopic shaft is connected with the screening plate; and the telescopic shaft is provided with a vibrator. A cadmium recycling method includes the following machining steps of land treatment, root pruning of a mulberry seedling, transplanting of the mulberry seedling, mulberry leaf cutting, processing treatment and cadmium recycling. By means of the equipment and the method, the utilization rate of the mulberry land can be raised, the soil repair effect is improved, and the cadmium treatment effect is improved.

The invention relates to an electric vehicle underground garage center conveying table assembly which comprises two rotating guide rails arranged in parallel. A lifting synchronous belt is installed on the rotating guide rails in a cycle mode. A conveying table driven by the lifting synchronous belt is arranged between the rotating guide rails. The conveying table comprises a transverse frame, a guide rail sliding base and a two-layer vehicle bearing device. The two ends of the transverse frame are provided with a guide rail sliding base running on the rotating guide rails in a guided mode. The two-layer vehicle bearing device is horizontally and perpendicularly installed on the transverse frame. An upper vehicle carrying frame, an upper vehicle trailing frame, a lower vehicle carrying frame and a lower vehicle trailing frame are installed on a two-layer guide rail frame of the two-layer vehicle bearing device, the upper vehicle trailing frame and the lower vehicle trailing frame are hung together or disengaged through a hook mechanism, the upper vehicle carrying frame and the lower vehicle carrying frame are hung together or disengaged through a hook mechanism, and the guide rail sliding base is fixedly connected with the lifting synchronous belt. The electric vehicle underground garage center conveying table assembly of the structure is applicable to storing vehicles such as electric vehicles with large weight, and has the advantages of being large in bearing weight, stable in structure, safe and reliable.

The invention provides an assembling clearance adjusting device of a LED display screen. The device comprises a main part and an auxiliary part; the main part comprises a first screw rod part with a clockwise screw thread and a first connecting head part fixed at one end of the first screw rod part, and the auxiliary part comprises a second screw rod part with a counter-clockwise screw thread anda second connecting head part; and the first screw rod part is used for being in threaded fit with a first clockwise screw hole formed in the LED display screen, and the second screw part is used forbeing in threaded fit with a second counter-clockwise screw hole formed in an LED display screen adjacent to the LED display screen, and the first connecting head part is detachably and fixedly connected with the second connecting head part. According to the assembling clearance adjusting device of the LED display screen, by means of the two simple parts of the main part and the auxiliary part with different thread directions, the clearance adjustment of a box body can be rapidly realized, the clearance can be large or small, the clearance adjustment can be precision controllable, and the operation is convenient and fast.

The invention discloses a mulberry leaf stem skin stripping device. A roller capable of rotating is arranged in a shell; the roller includes a forward reverse roller, and a feeding roller, a stripping roller and a discharge roller annularly and uniformly distributed around the forward reverse roller; hollow grooves are uniformly formed in the outer wall of the roller; telescopic tender skin cutter sets are arranged in the hollow grooves; the bottoms of the tender skin cutter sets are arranged on cutter bases; the cutter bases are arranged on the inner wall of the roller; compression springs are arranged between the cutter bases and the inner wall of the roller; rough skin blades are arranged between the tender skin cutter sets; the tender skin cutter sets include interlayer blades fixed on the cutter bases; telescopic inner-layer blades are clamped between the interlayer blades; large arc grooves are uniformly formed in edges of the interlayer blades; small arc grooves are uniformly formed in the inner-layer blades, and are concentrically matched with the large arc grooves; small rods are arranged at two ends of the inner-layer blades; buffer springs are arranged below the small rods; and the edges of the rough skin blades are sawtooth-shaped. The mulberry leaf stem skin stripping device can strips off high-protein skins of mulberry stems, and is high in stripping efficiency and stable and reliable in operation.