30results about How to "Reduce vertical pressure" patented technology

The invention relates to a bin, in particular to a spiral discharging bin capable of rotating in two directions. The bin comprises a feed cylinder, a spiral conveying machine, a rotary discharging cylinder and a hydraulic station; the hydraulic station is arranged on the ground; the top of the feed cylinder is provided with a feed port; the bottom of the feed cylinder is provided with the rotary discharging cylinder; the rotary discharging cylinder comprises an upper cylinder body, a lower cylinder body and a slewing mechanism which is connected with the hydraulic station; the lower cylinder body is fixed with the feed cylinder; the upper cylinder body is arranged on the lower cylinder body through the slewing mechanism; the slewing mechanism drives the upper cylinder body to rotate; the side of the upper cylinder body is provided with a feed hole; the spiral conveying machine passes through the feed hole, and is connected with the upper cylinder body and used for conveying materials; and the spiral conveying machine and the upper cylinder body rotate. According to the spiral discharging bin, materials are discharged by the two-direction rotation structure of the rotary discharging cylinder and the spiral conveying machine, so that the stability of the discharging amount of the bin is improved, and failure rate of equipment is reduced.

The invention discloses a polyacrylamide polymerization reactor. The reactor comprises a reactor body, a motor, a rotary shaft, an agitator blade, a temperature sensor, a vacuum pump, and an inert gasprotection bottle, wherein the reactor body is of a cylindrical structure, a feed inlet is formed in the upper part of the reactor body, a feed inlet cover is detachably installed at the feed inlet,the bottom of the reactor body is an arc heating board, a material discharge hopper is arranged in the center of the arc heating board, the motor is fixedly and detachably installed on the upper surface of the reactor body, the rotary shaft is connected with an output end of the motor, the agitator blade is connected with an output end of the rotary shaft, the agitator blade comprises a vertical board and a horizontal board, the vertical board is parallel to the rotary shaft, the horizontal board is vertical to the rotary shaft, a clearance is formed between the vertical board and the rotary shaft, the agitator arm is provided with multiple through holes, the temperature sensor is electrically connected with the heating board, the vacuum pump is connected with the reactor body through a T-valve, and the inert gas protection bottle is connected with the reactor body through the T-valve. The invention discloses a control method of the polyacrylamide polymerization reactor.

The invention provides an internal and external support structure of a building foundation pit and a construction method. The internal and external support structure comprises an anchor rod / cable, a spherical rotary support seat, an upper pressing rod, a lower pressing rod, a support pile and an internal support structure and external support structure connecting rod, wherein the anchor rod / cable is a rock-soil anchor rod / cable with a large inclination angle of 30 degrees to 60 degrees, one end of the anchor rod / cable 1 is anchored in a stable rock-soil body, and the other end of the anchor rod / cable extends into the foundation pit and is connected with the spherical rotary support seat; a top beam and a middle beam are arranged on the support pile, one end of the upper pressing rod is connected with the spherical rotary support seat, and the other end of the upper pressing rod is connected with the top beam; one end of the lower pressing rod is connected with the spherical rotary support seat, and the other end of the lower pressing rod is connected with the middle beam; and the internal and external support connecting rod is connected with an internal support structure. The invention discloses the internal and external support structure of the building foundation pit and the construction method. By adopting the anchor rod / cable structure with the large inclination angle, the horizontal length of the anchor rod / cable and the disturbance range of the anchor rod / cable to a soil layer is reduced, the damage of the anchor rod / cable to surrounding buildings and roads is avoided, and the environment is protected.

The invention discloses a forging press with a device for preventing a workpiece from being pressed and belongs to the technical field of forging presses. The forging press comprises a base. Supporting columns are arranged on the left and right sides of the top of the base, chutes are formed in opposite sides of the two supporting columns, movable plates are slidably connected in the chutes, a forging and pressing plate is arranged at the bottom of a screw, and a U-shaped supporting rod is connected to the outer wall of an inner threaded sleeve in a clamping manner. When the workpiece is forged and pressed, the forging and pressing base under pressure will move downward by matching with a gear and a rack, and an elastic force generated by deformation of a spring, a spring telescopic rod and a compression spring connected to the outer wall of the spring rod in a sleeving manner further weakens the longitudinal pressure of the forging and pressing base, so that the condition that the workpiece is pressed as the forging and pressing plate descends too much is avoided. A threaded limiting rod is matched with a limiting hole in the bottom of the forging and pressing plate. When the forging and pressing plate deviates in the descending process, the threaded limiting rod will prevent the forging and pressing plate from descending to forge and press the workpiece, so that the workpiececan be pressed from being pressed.

The invention discloses a novel double-wall granary. The commonly used granary in the market at present is an assembled corrugated steel plate granary which is poor in structural stability and complex in manufacturing procedures. The novel double-wall granary comprises a granary roof (1) and a granary body (2) which is connected with the granary roof, wherein the interior of the granary body comprises an inner wall (3) and an outer wall (5), the inner wall is provided with cambered regular protrusions (4) which are longitudinally distributed along the granary body, and the inner wall and the outer wall are mutually connected to form a heat-insulating closed space. The novel double-wall granary is applied to the storage and transportation of grains and the cement industry.

The invention discloses a gas impurity removal and hydrolysis composite tank and a blast furnace gas fine desulfurization system. The gas impurity removal and hydrolysis composite tank comprises a reaction tank body, the reaction tank body is provided with a gas inlet and a gas outlet along the radial direction, three net partition plates are arranged in the reaction tank body, the net partition plates are parallel to the center line of the reaction tank, gas flows along the radial direction of the tank body, the interior of the reaction tank body is divided into a gas distribution chamber, an impurity removal chamber, a catalytic hydrolysis chamber and a gas collection chamber by the net partition plates, a gas inlet is formed in the gas distribution chamber side of the reaction tank body, a gas outlet is formed in the gas collection chamber side of the reaction tank body, an impurity removal agent is placed in the impurity removal chamber, an organic catalytic conversion agent is placed in the catalytic hydrolysis chamber, and gas enters the gas distribution chamber from the gas inlet, uniformly flows to the impurity removal chamber and the catalytic hydrolysis chamber, is converged in the gas collection chamber and then is discharged through the outlet, so that the on-way resistance of the gas is small, the pressure loss is small, and harmful impurities in the blast furnace flue gas can be removed, and organic sulfides can be catalytically hydrolyzed.

The invention discloses a fixing device of a display screen backlight module. The fixing device comprises a display screen module provided with a backlight box, a backlight support, a panel and a screw, wherein the backlight support is bonded with the backlight box, the display screen module is fixedly connected with the panel, a screw hole is formed in the back of the backlight support, a stud longitudinally extends from the screw hole and is at least cut into two pieces, and a hole position matched with the stud is arranged at the back of the panel. During use, the stud is nested in the holeposition and the screw is screwed into the stud. By means of the technical scheme, the problem of Mura display caused by tolerance accumulation is effectively reduced.

The invention provides a coaxial bi-directional double quick-acting shaft division pluripotent helicopter speed reducer. The speed reducer is compact, large in speed ratio and torque, small in size, high in efficiency and long in service life, and is rarely maintained. According to the speed reducer, a planet gear shaft is used for replacing a planet gear in a planetary gear train and meshed with two identical sun wheels in an input shaft, an outer gear ring is meshed with the other gear in the planet gear shaft to form a stable rotating body, the outer gear ring is fixed, and a gear at the front end of the planet gear shaft is meshed with the other outer gear ring to output power to form the planet gear shaft train speed reducer. The speed ratio is mainly decided by the diameter of the two outer gear rings, by combining the diameter changes of the sun wheels and the gears on the planet shaft, rotating speed input by 1 / 3-1 time can be achieved, and revere use is achieved; one gear is additionally arranged at the front end of the planet shaft and meshed with the outer gear rings or the sun wheels to form double-speed output; one gear is additionally arranged at the rear end of the planet shaft and meshed with the outer gear rings or the sun wheels to form division output. Due to the special structure and the high functional property, the speed reducer can be widely applied to the mechanical industry.

The invention provides a constant-strength high-convex-ladder-shaped coal mine underground deep supporting device, which comprises a strip main steel band, wherein a boss is arranged in the middle of the strip main steel band; at least two strip grooves are formed on the back of the boss lengthwise; the two opening ends of the strip grooves are connected with the inner ends of a first plane and a second plane respectively; the outer end of the first plane is crossed with the edge of the outer end, which extends outwards gradually, of a first inclined plane; the outer end of the second plane is crossed with the edge of the outer end, which gradually extends outwards, of a second inclined plane; a supporting solid body is arranged between each two strip grooves; the plane of the supporting solid bodies is in the same plane as the first plane and the second plane or lower than the first and second planes or higher than the first and second planes; the supporting solid bodies have a through hole; and the connecting parts of the supporting bodies and the strip grooves are in an arc shape. In the invention, the full length of a basic supporting part is rendered in a basically constant strength state, both common supporting and deep supporting avoid cracking, tearing and breaking, and thus, the safety problem of steel band in supporting is solved radically.

The invention discloses an anti-typhoon wood structure system of a dwelling mount wall space considering both sunshade and rainproof function. The anti-typhoon wood structure system of the dwelling mount wall space considering both sunshade and rainproof function comprises a main body building and wrap eave buildings, wherein the wrap eave buildings are arranged on both sides of the main body building; a sheet type column and tie structure is formed by main body building pillars, main body building mount wall pillars and main body building longitudinal beams; main body building cross beams are connected with the sheet type column and tie structure in a mortise mode; main body building purlines are parallel to the main body building cross beams and evenly distributed on short pillars of the sheet type column and tie structure; one ends of auxiliary short pillars of the wrap eave buildings are fixed with the upper ends of the main body building pillars of right angle ends of the main body building, and the other ends of the auxiliary short pillars are connected with one ends of auxiliary purlines; the auxiliary purlines are abutted against the mount wall space of the main body building, the other ends of the auxiliary purlines are connected with the auxiliary short pillars on the other space; the auxiliary short pillars are sequentially connected through the main body building longitudinal beams and connected with the main body building mount wall pillars through the main body building cross beams; the main body building purlines are arranged on the main body building mount wall pillars and the tops of first auxiliary short pillars, second auxiliary short pillars and third auxiliary short pillars; and rafters are vertically arranged on the main body building purlines. The anti-typhoon wood structure system of the dwelling mount wall space considering both sunshade and rainproof function can enhance structural strength and improve integral rigidity.

The invention discloses a novel formwork trolley for underground excavation of a subway interval standard section tunnel. The novel formwork trolley mainly includes a variable bracket, a top formwork,a left formwork, a right formwork and an extension formwork. The variable bracket includes a left supporting leg, a right supporting leg, a control main support and an upper roof. The left supportingleg and the right supporting leg are movably connected with the control main support respectively, and the positions of two lifting and shifting grooves on the upper surface of the control main support are each provided with a lifting adjusting plate. The upper roof is connected with the lifting adjusting plates. The lower ends of the left and right supporting legs are each provided with a movingwheel. The top formwork, the left formwork, the right formwork and the extension formwork are connected with the upper roof, the left supporting leg and the right supporting leg correspondingly through a top hydraulic support, a side hydraulic support and an oblique hydraulic support. The device has strong applicability, is convenient to disassemble and assemble, and can be used for lining construction of different lengths according to actual use requirements.

The invention relates to a bin, in particular to a spiral discharging bin capable of rotating in two directions. The bin comprises a feed cylinder, a spiral conveying machine, a rotary discharging cylinder and a hydraulic station; the hydraulic station is arranged on the ground; the top of the feed cylinder is provided with a feed port; the bottom of the feed cylinder is provided with the rotary discharging cylinder; the rotary discharging cylinder comprises an upper cylinder body, a lower cylinder body and a slewing mechanism which is connected with the hydraulic station; the lower cylinder body is fixed with the feed cylinder; the upper cylinder body is arranged on the lower cylinder body through the slewing mechanism; the slewing mechanism drives the upper cylinder body to rotate; the side of the upper cylinder body is provided with a feed hole; the spiral conveying machine passes through the feed hole, and is connected with the upper cylinder body and used for conveying materials; and the spiral conveying machine and the upper cylinder body rotate. According to the spiral discharging bin, materials are discharged by the two-direction rotation structure of the rotary discharging cylinder and the spiral conveying machine, so that the stability of the discharging amount of the bin is improved, and failure rate of equipment is reduced.

The invention discloses a rotatable multi-layer energy absorption quay fender. The rotatable multi-layer energy absorption quay fender comprises a fender body, wherein the fender body is connected with an impingement plate; the impingement plate is connected with a pair of springs; the springs are fixedly connected with rotating arms respectively; the two rotating arms are respectively mounted at the two ends of a pivot; two upper connecting pillars are connected under the pivot; the upper connecting pillars are connected with lower connecting pillars through rubber springs; and the lower connecting pillars are connected with a quay through substrates. According to the rotatable multi-layer energy absorption quay fender, the purposes of multi-layer energy absorption and counterforce decrease are achieved under the situation that the quay fender does not occupy redundant space through the polyurethane fender body, the impingement plate, spring layers and the rubber springs between the connecting pillars, and the energy absorption ability and impact resistance are greatly improved; and in the structural form, the fender and the quay are connected through a rotating system, the fender surface has certain horizontal speed when a ship body is moored alongside, and the fender body can rotate by a certain angle in the speed direction of the ship body and in the direction perpendicular to the pivot direction, so that the friction between the fender and the ship body is reduced, the horizontal load is reduced, and the friction damage to the ship body is reduced.

The invention relates to a crawler-type roller horizontal movement curling pressure reducing bed. A bed body is sequentially and horizontally provided with a driven swing roller, a drive fixed roller, a driven fixed roller and a driven swing roller. An annular track surrounds the fixed rollers and the swing rollers to form a human body supporting plane capable of horizontally moving and curling. The synchronous one-direction and reciprocating moving function of the annular track and a patient can be achieved through a horizontal movement power mechanism, both-way 360-degree patient body position overturning and left-and-right adjustment of the patient on the bed can be achieved through a curling power transmission device, the body position overturning and moving are natural, comfortable, stable and safe, the vertical pressure of the stressed portion of the patient can be effectively relieved, the pressure, shearing force and friction on the human body are greatly reduced, the ventilation and heat dissipation functions are enhanced, the tension of the human body tissue and organ can be effectively relieved, the full-body blood circulation is promoted, the tissue and organ function can be enhanced, and the crawler-type roller horizontal movement curling pressure reducing bed plays a positive role in bedridden patient pressure sore preventing and treating, medical operation achieving and rehabilitation promoting.

The invention relates to a building wallboard, in particular to a high-strength building wallboard. The high-strength building wallboard comprises a wallboard body and mounting frames, first mountingplates are oppositely fixed to the side faces of the wallboard, adjusting rods are arranged on the first mounting plates in a penetrating mode and fixed to the first mounting plates, second mounting plates and mounting seats are oppositely fixed to the mounting frames, springs are connected between the first mounting plates and the second mounting plates, the adjusting rods penetrate through the second mounting plates, inclined adjusting faces are arranged at the ends of the adjusting rods, the other ends of the adjusting rods are connected with the mounting seats through the springs, sleevesare fixed to the mounting frames, conical adjusting blocks matched with the inclined adjusting faces are slidably connected into the sleeves, the ends of the conical adjusting blocks are connected with the mounting frames through the springs, and the positions, opposite to the conical adjusting blocks, of the mounting frames are in threaded connection with adjusting bolts. According to the technical scheme, the defects of poor waterproof and noise-insulation effects and low structural strength in the prior art can be effectively overcome.

The invention relates to the technical field of medical instruments, and in particular relates to a supporting table capable of preventing pressure sores. The supporting table comprises a supporting bottom plate, supporting sleeves are vertically and fixedly connected to the four corners of the top of the supporting bottom plate in an embedded mode, height adjusting rods are connected to the innercavities of the supporting sleeves in an embedded mode, and connecting rods are fixedly connected to the tops of the height adjusting rods; and the number of the connecting rods is two, a buffer strip is connected between the two connecting rods in a winding mode, a water bag is fixedly connected to the top surface of the supporting bottom plate, and a water adding port is connected to the rightside surface of the water bag. According to the present invention, the water bag is fixedly connected to the top surface of the supporting bottom plate, the water bag filled with water can relieve local pressure borne by the elbow or heel of a patient for a long time, so that pressure sores are prevented, and at the same time, the water bag is fixed to the supporting bottom plate, so that the water bag cannot deviate from the elbow or heel of the patient due to the tiny actions of the patient during the using process, and the use requirements are met.

The invention relates to a building wallboard, in particular to a high-strength building wallboard. The high-strength building wallboard comprises a wallboard body and mounting frames, first mountingplates are oppositely fixed to the side faces of the wallboard, adjusting rods are arranged on the first mounting plates in a penetrating mode and fixed to the first mounting plates, second mounting plates and mounting seats are oppositely fixed to the mounting frames, springs are connected between the first mounting plates and the second mounting plates, the adjusting rods penetrate through the second mounting plates, inclined adjusting faces are arranged at the ends of the adjusting rods, the other ends of the adjusting rods are connected with the mounting seats through the springs, sleevesare fixed to the mounting frames, conical adjusting blocks matched with the inclined adjusting faces are slidably connected into the sleeves, the ends of the conical adjusting blocks are connected with the mounting frames through the springs, and the positions, opposite to the conical adjusting blocks, of the mounting frames are in threaded connection with adjusting bolts. According to the technical scheme, the defects of poor waterproof and noise-insulation effects and low structural strength in the prior art can be effectively overcome.

The invention relates to a steel ball adding device of a ball mill. An inclined steel plate is welded at the bottom of a hollow square iron box which is formed by welding four vertical steel plates; the inclined steel plate passes through a lower opening of the vertical steel plate on one side for discharging balls; the inclined steel plate is welded with two lateral vertical steel plates and a horizontal steel plate to form a ball discharge chute; a horizontal shaft is arranged on the side for charging balls; rolling bearings arranged at two ends of a horizontal shaft are arranged at the small ends of lateral plates of fan-shaped gates on two sides; a fan-shaped gate in sliding fit with the outlet of the ball discharge chute is welded with the large ends of the lateral plates of the two fan-shaped gates on two sides; and a balancing weight is arranged at the tail end of a gate handle which is connected with the lateral plates of the fan-shaped gates to form a whole body. The device can be used for adding steel balls with small labor intensity and at high speed, and is high in work efficiency; as the fan-shaped gates only bear the lateral pressure of the steel balls, the lever-type gate handle with the balancing weight and a limiting block can be easily opened or closed, and the operation is safe and reliable; the output speed and quantity of steel balls can be controlled by the opening degree of the fan-shaped gates, and thus the steel balls which are discharged by inclining the chute are prevented from smashing a feeding opening of the ball mill.

The invention relates to a novel granary. The granary generally used in the current market is an assembled corrugated steel plate bin which has poor structural stability and troublesome manufacture program. The granary comprises a granary top (1) and a granary body (2) connected with the granary top (1), wherein the granary body comprises a vertical plate with a protrusion (3) and a transverse band (4) which is connected with the vertical plate and provided with a protrusion. The invention is applied to the storage and the transportation of grains and a cement industry.

The invention discloses a suspension bridge main cable-saddle saddle slip state active control lift device and method, comprising a suspension electromagnet, a partition and a permanent magnet; the suspension electromagnet is embedded in the bottom of the saddle groove of the saddle; two adjacent pieces A cable strand groove is formed between the partitions; the number of each cable strand groove is equal to the number of cable strands; the suspension electromagnet located in each cable strand groove is equipped with several convex tooth electromagnets along the longitudinal bridge direction; each The top surfaces of each convex-tooth electromagnet are arc-shaped, and the top connecting lines of all convex-tooth electromagnets are arc-shaped arcs, and the shape of the arch-shaped arc is the same as that of the main cable after seating; among them, the convex-tooth electromagnets The cross-sectional area gradually decreases from the top of the arch to the bottom of the arch on both sides; a permanent magnet block with a cross-sectional area matching it is arranged above each convex tooth electromagnet; the top of each permanent magnet block There are pressure sensors on both sides. The invention can effectively eliminate the unbalanced force of the main cables on both sides of the main tower during the construction process of the suspension bridge.

The invention provides a constant-strength high-convex-ladder-shaped coal mine underground deep supporting device, which comprises a strip main steel band, wherein a boss is arranged in the middle of the strip main steel band; at least two strip grooves are formed on the back of the boss lengthwise; the two opening ends of the strip grooves are connected with the inner ends of a first plane and asecond plane respectively; the outer end of the first plane is crossed with the edge of the outer end, which extends outwards gradually, of a first inclined plane; the outer end of the second plane is crossed with the edge of the outer end, which gradually extends outwards, of a second inclined plane; a supporting solid body is arranged between each two strip grooves; the plane of the supporting solid bodies is in the same plane as the first plane and the second plane or lower than the first and second planes or higher than the first and second planes; the supporting solid bodies have a through hole; and the connecting parts of the supporting bodies and the strip grooves are in an arc shape. In the invention, the full length of a basic supporting part is rendered in a basically constant strength state, both common supporting and deep supporting avoid cracking, tearing and breaking, and thus, the safety problem of steel band in supporting is solved radically.

The invention relates to a medical clinical adjustable elbow joint full-range motion orthotics, in particular to an orthotics for treating a patient who suffers from the clinically common elbow joint rigor and has a limited motion range so as to achieve the effect of increasing the motion range of the elbow joint. The adjustable elbow joint full-range motion orthotics disclosed by the invention consists of the following devices: a fixed bracket 1, a large arm rack regulating bracket 2, a gear regulating mechanism 3, a regulating handwheel 4, a front arm adjustable bracket 5, an underarm bracket 6, a front arm fixing bracket 7, a front arm extension rod 8, a large arm coaming 9 and a front arm coaming 10.

The invention discloses a flat tube pushing and limiting device for a threading machine. A hole expander is mounted at the bottom of a lower sliding plate, the end of the hole expander is in a semi-arc or trapezoid, when the hole expander extends forwards under the action of a cylinder, the hole expander opens a flat tube opening parallel to the hole expander, the hole-expanding deformation is 0.4-0.5 mm, and local expansion is conducted, so that the consistency of the tube opening is ensured; in addition, the hole expansion is conducted, meanwhile, the longitudinal pressure of the to-be-threaded flat tube at the lower part of the flat tube is reduced, and it is ensured that the expansion opening is no longer compressed and deformed, so that the threading work is completed; and for ensuring that no wide face contact of a pushing plate and the flat tube exists, pushing blocking blocks are mounted on the two sides of the pushing plate, under the action of the small cylinder, the pushingblocking blocks are lifted or dropped, a pushing mechanism pushes the pushing plate forwards during lifting, the pushing blocking blocks make contact with the bottommost flat tube side wall in a sliding groove, so that the flat tube is pushed out, a standard cylinder is recovered, the pushing blocking blocks are dropped, the flat tube bottom is not damaged, the flat tube side wall is frictionless,and the pollution to the pushing plate is avoided.

The invention relates to a heavy vehicle of a mass greater than 40 metric tons, such as a transport vehicle or a 'civil engineering' vehicle, comprising a steering axle provided with at least two tires and a driving axle by which is transmitted at least part of the motive power. According to the invention, the driving axle comprises four tires, at most two tires transmitting permanently at least part of the motive power and at least the tires of the driving axle being individually associated with a braking device.

A plastic pipe line for infiltrating irrigation is disclosed, and may be made up from the used corrugated wall type plastic pipe through drilling small holes, or the waste used hard plastic sheets through adhering three sheets together and drilling small holes to form a triangular infiltrating pipe. It is applied by burying it underground. Its advantages are very low cost, retaining moist root system, and preventing water loss.

The invention discloses a logistics information management device based on the Internet of Things, and belongs to the technical field of management equipment, the logistics information management device comprises a host, the outer side of the host is fixedly connected with a host cabinet, the bottom end of the host cabinet is in interference connection with a bottom plate, and the two sides of thebottom plate are embedded and connected with fixed connection mechanisms; and an inner cavity, a spring B, a sliding plate and a buckling block are arranged in the fixed connection mechanisms, a cavity is formed in the main cabinet, a plurality of pressure buffering structures are connected to the interior of the cavity in an embedded mode, and a bottom rod, a sealing cylinder, a sealing plug, apressing plate, a top block, a rubber air cushion and a spring A are arranged in each pressure buffering structure. Through the installed fixed connection mechanisms, the main cabinet can be rapidly installed and connected to the upper portion of the base, then the installation and fixing efficiency of the main machine can be improved, meanwhile, the situation that the main machine is impacted bythe external environment in the using process, and consequently the main machine topples over can be prevented, and the using effect can be improved.

The invention discloses a preparation method of a portable wireless synchronous control box. The bottom end of the prepared wireless synchronous control box is in interference connection with an extrusion plate, the bottom end of the extrusion plate is slidably connected to the interior of a bottom shell, the interior of the bottom shell is provided with a bottom cavity, the interior of the bottom cavity is connected with buffer devices in an embedded mode, the number of the buffer devices is multiple, each buffer device internally comprises a spring B, a supporting rod, a column casing, a rubber air cushion and a plate plug, the plate plug is inserted into the bottom end of the supporting rod and slidably connected into the column casing, the bottom end of the bottom shell is fixedly connected with the bottom plate, a limiting groove is formed in the bottom plate, and a fixing device is slidably connected to the interior of the limiting groove. Through the installed buffer devices, the situation that the wireless synchronous control box is damaged due to the fact that the wireless synchronous control box is bumped in the transportation process can be reduced to a certain degree, and therefore the using effect is improved.

The invention discloses a positioning fixture for metal machining. The positioning fixture comprises a supporting base and a workbench, wherein two vertical supporting rods are fixedly connected to the top wall of the workbench, a transverse plate is fixedly connected to the top walls of the two supporting rods, a hydraulic cylinder is installed in the center of the top wall of the transverse plate, and the piston end of the hydraulic cylinder penetrates through the transverse plate to be fixedly connected with a horizontal mounting block; and two rectangular grooves are formed in the top wallof the workbench, limiting blocks are fixedly connected to the front and rear inner walls of each rectangular groove, trapezoidal blocks are slidably connected between the two corresponding limitingblocks, limiting rods are fixedly connected to the opposite end faces of the two corresponding trapezoidal blocks, openings communicating with the rectangular grooves are formed in the bottom wall ofthe workbench, and two mounting grooves are formed in the bottom wall of the mounting block. According to the positioning fixture, coaxial positioning treatment on perforated metal is facilitated, thecoaxial precision of the metal during machining is ensured, and the machining stability is improved.