58results about How to "Stable use" patented technology

The invention discloses a rotor of a permanent magnet synchronous motor (PMSM) and a motor, belongs to the technical field of motors and solves the problem that a conventional device has a lot of higher harmonic magnetic fields. The rotor of the PMSM has a plurality of magnetic steel grooves uniformly distributed in the circumferential direction of a rotor body, permanent magnets are inserted in the magnetic steel grooves, and the adjacent permanent magnets are opposite in polarity. A plurality of slits are arranged in the outer edge of the rotor body at positions corresponding to the magnetic steel grooves, the slits communicate with an air gap between a stator and the rotor, and the inner ends of the slits are on the same arc line; or, a plurality of slits are arranged in the outer edge of the rotor body at the positions corresponding to the magnet steel grooves, the slits communicate with the magnet steel grooves, and the outer ends of the slits are located on the same arc line. The rotor of the PMSM and the motor solve the problem that lots of harmonics exist in the air gap between the inner side wall of the stator and the outer side wall of the rotor, reduce the electromagnetic noise of the motor and ensure air-gap flux density and sinusoidal features.

A pressurized facial massager machine comprises an elastic frame worn on the head of a user and a platen mounted on two end parts of the elastic frame, thereby pressurizing and correcting the faces of the user from two sides.

The invention relates to an adjusting method for a division error of angle measuring equipment. In order to adjust an eccentric error, a scheme of diameter observation and adjustment is employed. A line connecting direction from 0 degree to 180 degrees is aligned and a dial is adjusted at a line connecting direction of scale lines of 90 degrees and 270 degrees, so that no deviation between the dial plate center and the main shaft rotation center exists. The dial is rotated by 90 degrees and is adjusted according to a line connecting direction of scale lines of 90 degrees and 180 degrees, so that the dial center and the main shaft rotation center are overlapped completely. Calibration is carried out by using a standard polygonal prism and an autocollimator; if the precision does not meet a measurement requirement, adjustment is carried out repeatedly by using the method until the measurement precision meets a using requirement of angle measuring equipment. The method has the following advantages: the operation is simple and convenient; the method is easy to adjust and operate; the measurement precision can reach a best state; the using state of the method is stable; the market demand is large; the data are stable and reliable; the adjustment precision can reach 3''; and the expected using requirement of the conventional angle measuring equipment can be met.

The invention relates to a dynamic constant thickness ratio taper control method, wherein the method comprises the following steps: 1) effectiveness judgment of finish rolling outlet band steel taper measured value; obtaining an actual measurement feedback by methods such as filtering, obtaining the needed control deviation W after comparing with a benchmark; 2) calculation of roll gap deviation value on bilateral sides of F1 rolling mill; 3) calculation of roll gap deviation value on bilateral sides of F2 rolling mill; the calculation of F3 rolling mill is in a similar way; adjusting based on the value which is obtained from real-time memorizing and tracking the roll gap actual adjustment on bilateral sides of the F2 rolling mill. The method has the advantages as follows: 1) the method is simple and easy to operate; 2) the method obviously increases the taper control precision since the application of Meishan steel 1780 hot continuous rolling; the comprehensive taper index of plus or minus 20 microns is increased from 50% in the past to the 90% at present; stable application of rolling thin band steel having a thickness of 2.0mm can also be achieved; not only the taper control precision is increased, but also the stability in plate shape and rolling is ensured.

A hearth roll for a continuous annealing furnace able to suppress the occurrence of buildup on the hearth roll surface and able to be stably used for a long period under the high temperature environment in a continuous annealing furnace and a method of production of the same are provided.The hearth roll for a continuous annealing furnace has a cermet coating comprised 50 to 90 vol % of ceramic and the balance of a heat resistant alloy on its surface, the ceramic containing Cr3C2: over 50 to 90 vol %, Al2O3: 1 to 40 vol %, Y2O3: 0 to 3 vol %, and ZrB2: 0 to 40 vol % and having a balance of unavoidable impurities and pores, the heat resistant alloy containing Cr: 5 to 20 mass %, Al: 5 to 20 mass %, and one or both of Y and Si: 0.1 to 6 mass % and has a balance of one or both of Co and Ni and unavoidable impurities.

The invention discloses a fuel cell vehicle oxygen supply system and a vehicle, and belongs to the field of fuel cell vehicles. The fuel cell vehicle oxygen supply system comprises an air processor and a control unit, wherein the air processor comprises an air filter, an air compressor, a condenser and a humidifier which successively communicate through pipelines; the upper end and the lower end of the humidifier each have an inlet and an outlet; the outlet on the upper end of the humidifier is connected to the anode inlet of a fuel cell; the inlet on the lower end of the humidifier is connected to the cathode outlet of the fuel cell; the control unit is used for controlling the performance parameter information of the air entering the fuel cell. The fuel cell vehicle oxygen supply systemcontrols the performance parameter information of the air entering the fuel cell through the control unit to meet the actual needs of the vehicle, maintains the vehicle in a stable use state, improvesthe operating efficiency of the fuel cell system, and reduces energy loss.

The present invention provides a clarithromycin dispersible tablet preparation method, which comprises: carrying out ultrafine crushing on clarithromycin and part of lactose into micro-powder with the diameter of less than 10 [mu]m to obtain mixed powder A; taking the remaining filler and part of a disintegrant, and mixing to form mixed powder B; mixing an adhesive and purified water to prepare an aqueous solution with the mass fraction of 1-10%; mixing the mixed powder B with the mixed powder A in an equal increase manner, placing into a three-dimensional mixer to mix for 30-40 min, adding to the adhesive aqueous solution to prepare a soft material, and screening with a 16-24 mesh sieve; drying at a temperature of 50-70 DEG C, and screening the whole particle with a 16-24 mesh sieve; externally adding the remaining disintegrant, a lubricant and a sweetener to the particles to obtain a material C; and tableting the material C to obtain the clarithromycin dispersible tablets. According to the invention, the clarithromycin and part of the lactose are subjected to ultrafine crushing, such that the particle size is small, the specific surface area is increased, the adsorption property and the solubility are correspondingly increased, the bitterness of the product can be reduced, and the patient compliance can be improved; and with the process, the clarithromycin dispersible tablet with characteristics of stable quality, rapid drug dissolution and no bad odor can be prepared.

The invention relates to a planetary roller screw. The planetary roller screw comprises a split type nut assembly, a lead screw, and a roller, wherein the split type nut assembly comprises a sleeve, afirst nut, a second nut and an axial positioning piece, wherein an opening for allowing the first nut and the second nut to be loaded therein is formed in one end of the sleeve, the first nut and thesecond nut are installed at the two ends of the sleeve, limiting structures are installed between the first nut and the sleeve and between the second nut and the sleeve so as to limit rotation of thefirst nut and the second nut, and the axial positioning piece is installed at the opening of the sleeve and is used for sealing the first nut and the second nut inside the sleeve; the lead screw is installed inside the split type nut assembly and is coaxial with the split type nut assembly; and the roller is installed between the outer wall of the lead screw and the inner wall of the split type nut assembly, and the lead screw, the roller and the split type nut assembly are connected in a thread fit mode. The planetary roller screw has the beneficial effects that the split type nut assembly is adopted, the nuts can be separately machined outside the sleeve, and the precision requirement on the process requirement is greatly reduced.

This invention discloses a heat-conductive polysiloxane composition, which comprises components A, B, C and D. Component A is organic polysiloxane containing at least two alkenyl groups (viscosity at 25 deg.C is 10-100,000 mm2 / s). Component B is organic hydrogenated polysiloxane containing at least two hydrogen atoms directly bonded to silicon atom. Component C is highly heat-conductive aluminum powder or metal oxide powder filler. Component D is titanate coupling agent or aluminum coupling agent. The heat-conductive polysiloxane composition has such advantages as stable condition and no oil spill.

The invention discloses a projection screen bracket with a stable use state and a using method of the projection screen bracket with the stable use state. A screen accommodating barrel (5) is mounted on a supporting rod (1) through a first adjustment mechanism, and a first locking bolt (8) is unscrewed, so that a sliding block (7) can slide up and down on the supporting rod (1) to adjust the position; a straight rod part (3.2) is mounted at the top end of the supporting rod (1) through a second adjusting mechanism, and a second locking bolt (10) is unscrewed, so that the height of a screen hook (3) can be adjusted; the middle section of a rigid hanging line (11) is set to be a protruding section (15). According to the invention, the accommodating barrel is fixed on the supporting rod through a rotating shaft, and rotates and is vertically placed to accommodate a screen, the accommodating barrel is rotated and placed horizontally and then the screen is pulled out to be put into use, and the screen and the bracket can be overall transported and stored. The middle section of the rigid hanging line is set to be a protruding section, and the screen hook is stably clamped in the protruding section rightly when the screen is hung, so that the screen can be effectively prevented from swinging left and right in the using process.

The invention relates to a multi-angle adjusting system. The multi-angle adjusting system comprises at least two parts, namely, a first main body and a second main body which are movably connected, wherein the first main body is provided with a telescoping mechanism movably connected with the first main body, and the first main body can rotate around the second main body based on the expansion andcontraction quantity of the telescoping mechanism so that a first included angle is formed between fixing planes of the first main body and the second main body; the first main body at least comprises two parts, namely, a first main body part I and a first main body part II which are movably connected; the first main body part I is provided with a first telescoping mechanism movably connected with the first main body part I; the first main body part II is provided with a second telescoping mechanism movably connected with the first main body part II; the first main body part I can rotate around the first main body part II based on the expansion and contraction quantity of the first telescoping mechanism, so that a second included angle is formed between the first main body part I and thefirst main body part II; and / or the first main body part II can rotate around the first main body part I based on the expansion and contraction quantity of the second telescoping mechanism, so that athird included angle is formed between the first main body part II and the first main body part I.

The present invention relates to a mold and its manufacturing method, which is a lip-shaped part composed of a HIP layer that is directly diffusion bonded to the base material of the mold body through HIP (Hot Isopressing), wherein Densification has excellent flexural strength and toughness. While the surface roughness is completed with high precision, the edge can be completed with high precision sharp edge, thus providing a kind of material with good wear resistance and corrosion resistance. Mold for the lip. On the front end side of the mold flow path (5) formed in the mold body (4), a lip portion (8) is provided, and the coating liquid supplied to the mold flow path (5) flows from the lip portion (8) ) out of the mold, wherein at least the lip portion (8) is directly diffusion bonded to the base material of the mold body 4 by subjecting the alloy powder 19 with good corrosion resistance and wear resistance to HIP treatment The HIP layer 20 is formed.

The invention belongs to the technical field of 5G communication, and particularly relates to a water surface semi-submersible 5G communication base station. The base station comprises a signal pole,a 5G antenna installed on the signal pole, and one or a plurality of groups of protection assemblies used for protecting the 5G antenna. Each of the protection assemblies comprises a connecting framefixedly installed on the signal pole and a protection ring rotationally connected with the periphery of the connecting frame. The 5G antenna is mounted inside the connecting frame. Each of the protection rings comprises a plurality of guide blades which are uniformly arranged along the circumferential direction. A plurality of rotating rods are uniformly mounted between every two adjacent guide blades. The rotating direction of the rotating rods is the same as the rotating direction of the protection rings. The distance between the rotating rods close to the tail end of the flow when the guideblades are subjected to wind and the side walls of the guide blades is reduced from inside to outside. According to the water surface semi-submersible 5G communication base station, the protection rings can rotate without extra power and can be driven by wind power; the protection rings can block floaters through the guide blades and the rotation of the rotating rods around the signal pole, and large floaters can be conveyed to the position close to the guide blades through the rotating rods, so that the floaters are blown away through water flow acceleration.

This invention discloses a heat-conducting silicone composition used in electronic combined component. The heat-conducting silicone composition comprises: component A (organic silicone with hydroxyls), and component B (highly heat-conducting inorganic filler). The heat-conducting silicone composition has such advantages as high application stability and no oil overflow.

The invention discloses an industrial mechanical system and a control method of the industrial mechanical system. The industrial mechanical system comprises a mechanical equipment body, a protective baffle, a cleaning brush and a rubber protective airbag, a mounting plate is connected to the mechanical equipment body through bolts, and a rotating disc is welded and fixed to the top end of an output shaft of a small servo motor; a transmission belt is in engaged connection with the rotating disc, connecting blocks are connected to the bottom end of the upper connecting block and the bottom end of the lower connecting block through screws, the connecting blocks are slidably connected to the limiting rods, and protective baffles are connected to the bottoms of the connecting blocks through screws. According to the industrial mechanical system and the control method of the industrial mechanical system, a protective baffle is arranged, the rotating disc can drive the transmission belt to rotate, at the moment, the transmission belt drives the upper connecting block and the lower connecting block on the upper side and the lower side to move outwards or inwards at the same time, and then opening and closing of the protective baffle can be completed conveniently and rapidly; and the stability and safety of the use and placement state of the subsequent control equipment body can be ensured.

A stable assembly structure of a storage device comprises a back plate, a left side plate and a right side plate, rear bent parts are integrally bent at the rear ends of the left side plate and the right side plate, the back plate can be fixedly arranged on the inner sides of the rear bent parts in a pre-positioning mode, and hidden cavities are formed between the back plate and the rear bent parts. A cushion piece is arranged on the outer side of each rear bent part, is detachably positioned and clamped on the outer side of the rear bent part, and is provided with a notch position; a hangingposition is arranged on each rear bent part; and the hanging position and the notch position are correspondingly arranged, and are communicated with one hidden cavity. Through improvement of the structure, the storage device has the advantages of being simple and reasonable in structure, excellent in performance, high in connection compactness of all components, low in manufacturing cost, tidy andexquisite in appearance, rapid and convenient to assemble, safe and reliable to use and the like, meanwhile, the assembled storage device can be used as a furniture drawer, a storage box, a shelf andthe like, the application range is wide, and the practicability is high.

The invention relates to a hydraulic nursing bed. The hydraulic nursing bed at least comprises a bed board disposed on a bed body, the bed board at least includes a first bed plate, a second bed plate, a third bed plate and a fourth bed plate which are movably connected to one another, and the fourth bed plate can rotate around the third bed plate on the basis of a first external force, so that afirst included angle is formed between the fourth bed plate and a first fixing surface; the second bed plate can rotate around the third bed plate on the basis of a second external force, so that a second included angle is formed between the second bed plate and the first fixing surface; a first form of the bed board is defined under the case of increasing the first included angle and the second included angle, and a second form of the bed board is defined under the case of increasing the first included angle and decreasing the second included angle; when the bed board is switched from the first form to the second form, at least the posture of the human body can be changed and / or the human body is prevented from tilting forward. According to the hydraulic nursing bed, a forward tilting trend can be predicted in time when a user tilts forward due to fatigue, and correspondingly the risk of falling due to excessive forward tilting of the user is effectively avoided.

The invention provides a dust-proofing thin film assembly which can prevent a photomask from being damaged because a frame is not contacted with the photomask even though the dust-proofing thin film assembly is pressed on the photomask in strong force. The dust-proofing thin film assembly attaches a dust-proofing thin film on one end face of the frame, and an adhesive layer is arranged on the other end face of the frame. The dust-proofing thin film assembly is characterized in that the adhesive layer contains an adhesive and a particle space agent. The hardness of the space agent, measured by an A durometer, is lower than 80, so that the space agent is harder than the adhesive.

The invention discloses oseltamivir phosphate oral liquid and a preparation method thereof. The oseltamivir phosphate oral liquid is prepared from, by weight, 0.2-0.4 part of oseltamivir phosphate, 0.03-0.05 part of a cosolvent, 0.03-0.05 part of aspartame, 0.03-0.05 part of a stabilizing agent, 0.03-0.05 part of ethyl p-hydroxybenzoate and 75-95 parts of water. The prepared oseltamivir phosphate oral liquid has the advantages of being small in taking dosage, rapid to absorb, stable in quality, convenient to carry and take, easy to preserve, good in stability, high in clearity and the like and is particularly suitable for industrial production.

The invention provides a password keyboard which comprises a keyboard plate, a key trigger mechanism and a bottom case, wherein the key trigger mechanism comprises a key circuit board, a spacing layer and a signal circuit board, the spacing layer is arranged on the lower side of the key circuit board, the signal circuit board is arranged on the lower side of the spacing layer, a plurality of conductive contacts which correspond to the key positions are arranged on the key circuit board, and a plurality of short circuit contacts which correspond to the conductive contact positions and can be in contact with the conductive contacts are arranged on an upper panel of the signal circuit board. According to the password keyboard, after the keys are pressed, the conductive contacts can make contact with the short circuit contacts in a short distance, key signals are produced, after the keys are loosened, key signals are not produced due to the self-elasticity of the key circuit board and the separation function of a lining plate, strike sound is not produced in the key rebounding process, the keys are basically free of noise, the use state is stable, the safety performance of the password keyboard is improved to a great extent, and the user's password information is effectively protected.

The invention provides a dyphylline tablet and a preparation method thereof, which relate to the technical field of medicine, including dyphylline, loquat dew, Chuanbei, mulberry, mugwort leaves, berberine, microcrystalline cellulose, hydroxypropyl methyl Cellulose, lubricant, antioxidant, vitamin C, vitamin E; the preparation method is as follows: wash Chuanbei, mulberry, mugwort leaf, and coptis, dry in low-temperature vacuum, and pulverize with supersonic airflow; add dihydroxyprophylline and mix evenly, Add water; add microcrystalline cellulose, hydroxypropyl methylcellulose, antioxidants, vitamin C, and vitamin E and mix well; pour the material into a granulator to make tablet cores; take lubricant, dry it, and crush it to the nanometer level , sprayed on the tablet core to obtain diprophylline tablets. The dihydroxyprophylline tablet of the present invention has high bioavailability, stable disintegration and dissolution speed, high dissolution rate, stable quality, stable drug release speed, convenient carrying and taking, simple process, few types of auxiliary materials, short production process and low cost. Low.

The invention relates to a loader assembly production line, and belongs to the technical field of production line equipment. The key point of the technical solution of the loader assembly line is to include the guide rail device and the assembly trolley, the guide rail device comprises a plurality of groups of guide rail assemblies arranged along the same straight line, and each guide rail assembly comprises two parallel ground guide rails; an assembling platform is arranged between every two adjacent guide rail assemblies, platform guide rails parallel to each other are fixed to the two sidesof the upper surface of each assembling platform. The cross sections of the platform guide rails are the same as those of the ground guide rails; the platform guide rails are aligned with the groundguide rails at two ends; a mounting pit is formed in the ground of the assembly workshop below the assembly platform, and a lifting device for driving the assembly platform to move in the vertical direction is arranged in the mounting pit. When a worker assembles parts at the bottom of the loading machine, the height of the loading machine can be increased, and then the worker can conduct assembling operation conveniently.

The invention relates to extracts of traditional Chinese medicines and preparation thereof, in particular to extracts of panaxtriol saponins, extracts of panax notoginseng and preparation thereof. The preparation process comprises the steps of extraction, separation, concentration and the like.

The invention provides a roller kiln cooling device. The roller kiln cooling device comprises a roller kiln and a plurality of cooling units arranged in the motion direction of products on the rollerkiln, the cooling units comprise fast cooling fans which are fixedly arranged on the outer side of the roller kiln, fast cooling main pipes communicating with air outlets of the fast cooling fans, a plurality of upper fast cooling branch pipes communicating with the fast cooling main pipes and a plurality of lower fast cooling branch pipes communicating with the fast cooling main pipes, a plurality of lower air outlet holes are formed in the upper fast cooling branch pipes in the direction facing the products on the roller kiln, and a plurality of upper air outlet holes are formed in the lowerfast cooling branch pipes in the direction facing the products on the roller kiln. According to the roller kiln cooling device, cold air flow is generated by electrifying the fast cooling fans, the air flow passes through the fast cooling main pipes and then enters each upper fast cooling branch pipe and each lower fast cooling branch pipe, air injection cooling is performed on the upper surfacesand the lower surfaces of the products on the roller kiln through the lower air outlet holes of the upper fast cooling branch pipes and the upper air outlet holes of the lower fast cooling branch pipes correspondingly, through continuous cooling on the roller kiln, the cooling efficiency can be improved, and the fast cooling time can be reduced.

The invention discloses a projection screen bracket with a stable use state and a using method of the projection screen bracket with the stable use state. A screen accommodating barrel (5) is mounted on a supporting rod (1) through a first adjustment mechanism, and a first locking bolt (8) is unscrewed, so that a sliding block (7) can slide up and down on the supporting rod (1) to adjust the position; a straight rod part (3.2) is mounted at the top end of the supporting rod (1) through a second adjusting mechanism, and a second locking bolt (10) is unscrewed, so that the height of a screen hook (3) can be adjusted; the middle section of a rigid hanging line (11) is set to be a protruding section (15). According to the invention, the accommodating barrel is fixed on the supporting rod through a rotating shaft, and rotates and is vertically placed to accommodate a screen, the accommodating barrel is rotated and placed horizontally and then the screen is pulled out to be put into use, and the screen and the bracket can be overall transported and stored. The middle section of the rigid hanging line is set to be a protruding section, and the screen hook is stably clamped in the protruding section rightly when the screen is hung, so that the screen can be effectively prevented from swinging left and right in the using process.

The invention discloses an intelligent precise body fat instrument. The intelligent precise body fat instrument comprises a fat measuring mechanism, the fat measuring mechanism is electrically connected with a measuring rod through a cable, the intelligent precise body fat instrument further comprises a frame body, a bearing plate is detachably connected to a top opening of the frame body, and a base is detachably connected to a bottom opening of the frame body; a placing groove is formed in the top surface of the bearing plate, the measuring rod is detachably connected with the placing groove, and the end, away from the grease measuring mechanism, of the cable extends into the placing groove and is electrically connected with the measuring rod; and a fixed frame and a box body are sequentially arranged in the frame body from top to bottom, the box body is arranged at the top of the base, the fat measuring mechanism is arranged in the box body, a display screen is embedded in the fixedframe, the display screen is electrically connected with the fat measuring mechanism, the display screen is in contact connection with the bearing plate, and a plurality of first groove bodies are formed in the bottom surface of the base. According to the whole device, the using effect is optimized, the occupied area is reduced, the road holding force is good, the using state is stable, potentialsafety hazards are reduced, the structure is simple, and production is easy.

The invention relates to a medicine for treating infertility. The medicine has the functions of stimulating menstrual flow, replenishing blood, promoting blood circulation and eliminating blood stasis, clearing heat and promoting diuresis, as well as regulating menstruation and stopping leucorrhea. The medicine belongs to a Chinese herbal medicinal preparation mainly used for treating fallopian tube obstruction and ovulation failure. With the Chinese herbal medicinal preparation, the defects of easy relapse and not ideal long-term curative effects existing in the western medicine surgical treatment for fallopian tube obstruction, and the defects of easy generation of drug resistance and large side effects existing in treatment adopting ovulation induction medicines are overcome. The Chinese herbal medicinal preparation has the characteristics of being rapid in taking effect, stable in curative effects, and being capable of treating both symptoms and root causes, and relapse seldom occurs, especially, the Chinese herbal medicinal preparation has ideal treatment effects for patients having relapse after the surgical treatment and obtaining not obvious effects after using the ovulation induction medicines.

The invention discloses miniature candy and a preparation method thereof. The preparation method includes the following steps that (1) a step (a) or a step (b) is performed, specifically, (a) a powdered sugar mixture is sieved, a powdered sugar mixture with the particle size of 0.2-0.45 mm is used as a core I, 10-60 parts by mass of the core I is put into a water chestnut pan, and the operation (1) is repeatedly carried out until the particle size of 80wt% or above of the particles is 0.3-4mm; (b) 5-10 parts by mass of excipients are placed in a centrifugal granulator, air is blown into the centrifugal granulator, and 0.5-2 parts by mass of binder is added until the particle size reaches 0.2-0.45 mm to obtain a core II, and the operation (2) is repeatedly carried out on the core II until the particle diameter of 80w% or above of particles is 0.3-4 mm; and (2) the particles obtained in step the (1) are dried to obtain the miniature candy. The miniature candy has significant effects on sugar or content quantification, stability improvement and absorption enhancement.

The invention discloses a ball mill slipper ring crack repairing method. The method comprises the following steps that S1, thorough planing is carried out on a crack at a connecting part of a slipper ring and an end plate, and then weld joint treatment is carried out; S2, the slipper ring and the end plate are reinforced through evenly-distributed square steel plates; S3, after welding is completed, stress relief treatment is conducted in a high-frequency electromagnetic heating and flame heating heat preservation manner; S4, the surface of the slipper ring which is deformed due to welding is turned to be round, and then the slipper ring is ground to be smooth; S5, a bearing bush is drawn out and scraped again, after a journal is machined, a grinding body is jacked up, and the bearing bush is lifted out for grinding and scraping; and S6, horizontal correction of a mill barrel is carried out, a base plate is added between a bearing bush seat and the spherical bottom according to the turning amount, or the relative distance of the bearing bush seat is adjusted to ensure that the center line of a mill body is consistent with the original center line. The repaired structure has the effects of being high in structural strength, stable in use and operation and long in service life.

The invention provides a folding table, which can simplify the structure, improve the appearance and improve the use safety, avoids complex welding, can be easily and reasonably manufactured, and caneasily and firmly fix a cam block and a supporting block on a rotating shaft which can rotatably support a table top and angle iron. Therefore, the folding action of the desktop can be stably and reliably carried out. The folding table is characterized in that angle iron (3) is fixed on the lower surface of a table top (2). A rotating shaft (6) is arranged in the angle iron (3), so that the angleiron (3) and the table top (2) are rotatably supported on the rotating shaft (6). A cam block (24) in which first and second cam grooves (32, 33) are formed is disposed in the angle iron (3). A lock cam (34) is rotatably disposed on the outside of the cam block (24). The locking cam (34) is engaged with the first and second cam grooves (32, 33). The cam block (24) is fixed to the rotating shaft (6).