51results about How to "Adjust the level" patented technology

The invention discloses a gear shifter performance testing device. According to the gear shifter performance testing device, the output shaft of a power mechanism rotates to drive a swing arm to swing, and the swing arm drives a swing rod to move; when the wing rod moves, two force sensors drives the handle ball of a gear shifter to swing to simulate gear shifting of the gear shifter, so that the force sensors can in real time measure the force for driving the handle ball to swing; the measuring heads of two displacement sensors abut against the two force sensors and accordingly the two displacement sensors can in real time measure the forward and backward swing distance of the handle ball. The gear shifter performance testing device is relatively accurate in testing data.

The invention discloses a tensioning device for applying a pretensioning force to fiber cloth materials and a tensioning method of the tensioning device. The tensioning device comprises a slide way (11), wherein a rolling groove (2) is arranged in the slide way (11) and can freely slide in the slide way (11); two rolling shafts (4) are arranged in the rolling groove (2), can roll along the horizontal direction of the rolling groove (2), and is used for winding the fiber cloth materials so that the fiber cloth materials are locked and fixed; an opening (8) is formed in an upper flange of the rolling groove (2); a base plate (3) is arranged at a position, which is close to the upper flange of a tensioning end, of the rolling groove (2); an L-shaped baffle (5) is arranged at the tensioning end of the rolling groove (2) and is abutted to the rolling shafts (4); and by the L-shaped baffle (5), end rigidity is improved. A fiber cloth material anchoring effect is excellent, through displacement control loading after tensioning, the outer end of a bolt bar is connected with a sensor, magnitude of a tensioning force can be measured directly, the problem that when fiber cloth materials are tensioned by another device, force is difficult to measure is solved, the fiber cloth materials are wound on the rolling shafts, and the problem that the fiber cloth materials cannot be stressed evenly is solved.

The invention discloses a feed feeding vehicle which comprises a vehicle frame, wherein a seat is arranged at the front part of the vehicle frame; a walking motor is arranged at the lower part of the seat; the walking motor is connected with a direct current supply; a box body is arranged on the vehicle frame at the back part of the seat; a discharge outlet of the box body is formed in the back end of the box body; a transporting auger shaft is arranged at the lower part of the inner chamber of the box body; the front end of the auger shaft extends out of the front wall of the box body; the back end of the auger shaft extends out of the back wall of the box body from the discharge outlet of the box body; the front end of the auger shaft is supported on the vehicle frame; an auger driving direct current motor is arranged on a chassis of the vehicle frame below the seat, is in electric connection with the direct current supply, and transmits power to the auger shaft; a discharging device is arranged on the auger shaft at the back end of the box body; a feed inlet of a discharging pipe is formed in the lower end of the discharging pipe of the discharging device and near one side of the back wall of the box body; the feed inlet of the discharging pipe is connected with the discharge outlet of the box body; a discharge outlet of the discharging pipe is formed in the upper end of the discharging pipe; a feed lifting transportation mechanism is arranged in the discharging pipe. The feed feeding vehicle is particularly suitable for transporting feed, with relatively small space, of small-scale feeding farms.

Provided is a microwave digestion furnace chamber which comprises a pedestal, a cavity, a base plate which is fixed at the bottom of the cavity, a support which is fixed between the base plate and the pedestal, and a digestion pot. The microwave digestion furnace chamber is characterized by further comprising a rotary disc which is arranged at the bottom in a tank body of the cavity, wherein, thedigestion pot is arranged on the rotary disc, an elevating assembly which is arranged on the pedestal and comprises a movable base plate that is arranged between the rotary disc and the elevating assembly, located at a same horizontal plane where the base plate is located and provided with an anti-current groove, and a movable cover which is arranged at the upper end of the cavity, movably connected with the cavity through a rotating shaft and provided with an anti-current groove. The beneficial effects of the invention are as follows: microwave leakage can be prevented; personnel safety of surrounding workers can be ensured; manpower is saved; working efficiency is improved.

The invention model discloses a novel mounting structure for an enameled ceiling. The novel mounting structure is formed in such a manner that hanging pieces, a main keel and ceiling plates are spliced in a sequential mode. The hanging pieces are connected with the main keel. Each hanging piece comprises a main keel hook and a suspension bar. Each main keel hook is fixedly connected with a wall through each suspension bar. The main keel is used for fixedly installing the ceiling plates. The cross section of the main keel is in a C shape. Mounting holes connected with the main keel hooks are formed in the open side of the C shape. The outer side surface on the side, opposite to the mounting holes, of the C shape is provided with insertion wing structures. The ceiling plates are fixedly connected with the main keel. The two sides of each ceiling plate are both provided with buckles connected with corresponding insertion wing structures in a matched mode. The novel mounting structure for the enameled ceiling has following advantages: the ceiling plates and the main keel are connected and fixed directly through the insertion wing structures so that installation of a secondary keel is omitted; the assembly procedures are simple; and the installation efficiency is high.

The invention discloses a wire spraying device with an anti-residue heating structure for non-woven fabric production, and relates to the technical field of non-woven fabric production equipment. Thedevice comprises a composite base and a wire spraying mechanism. A support adjusting mechanism is arranged at the upper part of the composite base, and a power transmission mechanism is arranged on the left side of an extrusion molding pressurizing mechanism. The wire spraying mechanism comprises a side frame, bolts, a wire spraying plate and wire spraying guide holes. The side frame is internallyprovided with the wire spraying plate. According to the wire spraying device with the anti-residue heating structure for non-woven fabric production, the structure is increased, and meanwhile the performance of the whole device is greatly improved. The improved device not only has a smooth wire spraying effect, but also additionally achieves the ability of continuous internal heating, correspondingly the shape of raw materials in the process of extrusion is maintained, the generation of residues of internal materials in the device is avoided, and people's needs for use are effectively met.

The invention relates to a novel structure of a drilling and milling machine tool, and the novel structure comprises a base, upright posts, a power head, a sliding worktable, a regulating base, circular arc-shaped slotted holes, a motor, a lead screw, an upper cross beam, a handwheel, a sliding bearing, a bearing seat and a bolt, wherein the power head is mounted and fixed on the regulating base, the regulating base is mounted and fixed on the sliding worktable through the bolt and the circular arc-shaped slotted holes which are in bilateral symmetry on the regulating base, the sliding worktable is mounted and fixed on the two upright posts through the sliding bearing and the bearing seat, the upright posts are mounted and fixed on the base, the upper cross beam is mounted and fixed at the upper end parts of the upright posts, the lower end of the lead screw is connected with the sliding worktable in a threaded fit manner, the upper end of the lead screw is connected with the upper cross beam, and the top end of the lead screw and the handwheel are connected and fixed.

A crystal growth furnace verification system and a crystal growth furnace verification method utilizing the system are provided. The system includes a first laser source disposed on the center of theupper surface of a pedestal and a semitransparent baffle plate horizontally disposed on the pedestal. The first laser source is turned on and the pedestal is rotated around a rotation shaft so that the degree of levelness of the pedestal is adjusted through a movement path of a first light spot formed by first laser on the semitransparent baffle plate. The system can also be used for verifying thedegree of concentricity between the pedestal and a seed holder. A second light spot is formed on the semitransparent baffle plate by a second laser source disposed on the seed holder, and the degreeof concentricity between the pedestal and the seed holder is adjusted through the overlap ratio of the first and second light spots. The method utilizes the system and the verification accuracy and efficiency can be increased as positions and movement paths of laser beams are easy to distinguish.

A distance measuring device for a building comprises a first electric push rod, a second electric push rod and a laser range finder which are vertically arranged, wherein the ends of the first electric push rod and the second electric push rod are fixed together, the first electric push rod is located on the upper portion, a first push rod of the first electric push rod extends upwards, and a second push rod of the second electric push rod extends downwards, a vertical rod is arranged above the first electric push rod, a vertical cavity is formed in the lower end of the vertical rod, the first push rod extends into the vertical cavity, and the first push rod is in clearance fit with the vertical cavity. The invention further discloses a measuring method using the distance measuring device for the building. Compared with the prior art, the device has the technical effects that the electric push rod is arranged, so that the horizontal height of the laser range finder can be adjusted, and two modes of laser range finding and mechanical range finding can be conveniently switched.

The invention discloses a fertilization device for greenhouse cultivation. The fertilization device comprises a working platform, a No.1 fertilizer box, a mixing box, a No.2 fertilizer box and a blanking box, wherein the No.1 fertilizer box, the mixing box and the No.2 fertilizer box are separately installed on the upper surface of the working platform, two blanking slant plates are arranged at the upper part of an inner cavity of the mixing box, four corners of the lower surface of the working platform are fixedly connected with the upper surface of a support base through damping devices, traveling wheels are fixedly installed on the lower surface of the support base, a blanking support plate is fixedly installed on the support base through a height-regulating device, and the upper part of the blanking box is communicated with the lower inner cavity of the mixing box through an elastic hose. The fertilization device has a simple structure, has a good damping effect, mixes different fertilizers according to a proportion, has a good mixing effect, can regulate the horizontal height of a blanking opening so as to adapt to different road conditions, and has high practicability.

The invention relates to the technical field of teaching appliance devices, in particular to a multifunctional teaching memory desk for a primary or secondary school student. The multifunctional teaching memory desk comprises a desk top, multiple groups of memory plates, a memory roller, a rotary rod, a rotary shaft, a handle and multiple groups of auxiliary memory plates, wherein the multiple groups of memory plates are all connected with the curved surface of the memory roller through rotatable shafts, a memory roller placement cavity is formed in the desk top, the upper surface of the desktop is communicated with a memory plate showing opening, the memory plate at the topmost of the memory roller extends out of the upper surface of the desk top through the memory plate showing opening,and the left end of the rotary shaft penetrates through the side walls of the desk top to extend into the memory roller placement cavity and detachably connected with the memory roller. The multifunctional teaching memory desk also comprises four groups of supporting legs, two groups of reinforcing rods and four groups of adjustable bases, wherein the tops of the four groups of supporting legs are connected with the left front, the left back, the right front and the right back of the bottom of the desk top, the bottoms of the four groups of supporting legs are all provided with inner threadedholes, the top ends of the four groups of adjustable bases respectively extend into the bottoms of the four groups of supporting legs and are respectively screwed at the bottoms of the four groups ofsupporting legs.

The invention discloses a connecting structure of a main beam and supporting legs of a bridge girder erection machine. The connecting structure comprises a bearing platform, a lifting mechanism, a pull rod, connecting rods, stand columns, a gantry, a rotating mechanism, a power pulley mechanism, the supporting legs, a main beam mechanism and bridge piers, wherein both ends of the main beam mechanism are provided with the supporting legs and the bridge piers, and the supporting legs are fixedly connected with the bridge piers; one end of the main beam mechanism is symmetrically provided with the stand columns, one end of the main beam mechanism is provided with a bearing platform, and the bottom of the bearing platform is fixedly connected with the top end of the two symmetrically arrangedstand columns; and the top of the bearing platform is fixedly provided with the lifting mechanism, and the lower part of the bearing platform is provided with the gantry. According to the connecting structure, a servo motor drives a driving roller and a driven roller to rotate, so that a pull rope drives a sliding block to slide in a limiting slot, and the sliding block drives a bottom plate to move; and a rotary table on the bottom plate adjusts the angle according to the actual needs, so that when the bridge girder erection machine is in curved section and skew bridge, the proper angle is needed to be rotated and the bridge is directly erected and parts do not need to be dismantled.

The invention relates to the technical field of geological engineering surveying and mapping, in particular to a combined surveying instrument positioning and adjusting device for geological engineering surveying and mapping. The combined surveying instrument positioning and adjusting device comprises a support frame, an anti-skid sleeve is arranged at the bottom of the support frame, a first connecting base is arranged at the end part of the support frame, a first connecting rod is inserted into the first connecting base, a first adjusting knob is correspondingly arranged on the outer side of the first connecting base, a second connecting base is connected to the upper end of the first connecting rod, a second adjusting knob is correspondingly arranged on the outer side of the second connecting base, a first fixing disc is connected to the upper surface of the second connecting base, a first rotating disc is arranged above the first fixing disc, a first connecting part is arranged on the upper surface of the first rotating disc, and a first driving motor is arranged on the upper side of the first connecting part. According to the combined surveying instrument positioning and adjusting device, and through the design, the overall convenience, efficiency and practicability of the combined surveying instrument positioning and adjusting device for geological engineering surveying and mapping can be improved.

The invention relates to a needle mushroom root cutting device. The needle mushroom root cutting device comprises a machine frame, a transmission mechanism and a cutting mechanism, wherein the transmission mechanism and the cutting mechanism are arranged on the machine frame; the machine frame comprises a horizontal outer frame, stand columns which are vertically fixed at the lower ends of the four corners of the outer frame and two supporting plates which are horizontally fixed in the outer frame; the transmission mechanism comprises a driving belt wheel, a driven belt wheel, a conveying belt, a plurality of clamps and a first driving motor, the driving belt wheel and the driven belt wheel are horizontally arranged on the two supporting plates correspondingly, the conveying belt is woundaround the peripheries of the driving belt wheel and the driven belt wheel, the plurality of clamps are fixed on the outer surface of the conveying belt at intervals, and the first driving motor drives the driving belt wheel to rotate; and the driving belt wheel and the driven belt wheel are connected to the two supporting plates through vertical shafts in a rotating mode correspondingly, the clamps are detachably provided with the needle mushroom in a clamped mode, moreover, the root of the needle mushroom penetrates out of the lower portions of the clamps, the cutting mechanism is located onone side below the conveying mechanism, the conveying mechanism conveys the clamps provided with the needle mushroom in a clamped mode to one side of the cutting mechanism, the cutting mechanism comprises a horizontal circular blade and a second driving motor for driving the circular blade to rotate, and a cutting edge of the circular blade is used for cutting the root of the needle mushroom below the clamps.

The invention discloses height-adjustable horizontal force output equipment which comprises a moving seat, a U-shaped plate is mounted on the moving seat, a rectangular frame is slidably connected into the U-shaped plate, a servo motor is mounted at the bottom of the moving seat, a driving gear is mounted at the output end of the servo motor, two threaded cylinders are rotatably connected to the upper end of the moving seat, and a driving gear is mounted at the output end of the driving gear. A transmission mechanism is arranged between the two threaded cylinders, screw rods are in threaded connection with the interiors of the two threaded cylinders, the upper ends of the two screw rods are fixedly connected with the bottom of the rectangular frame, and a driven gear is fixedly installed outside one of the threaded cylinders. Through cooperation of the limiting wheel and the warning lamp, a load-bearing cable can be subjected to horizontal detection, through cooperation of the servo motor, the threaded cylinder and the screw rod, the load-bearing cable can be subjected to horizontal adjustment, so that the longitudinal force of the balance weight can be changed into horizontal force, and the tray and the balance weight can be shielded and prevented from falling off and being damaged; and an experimenter can be protected.

The invention relates to a connecting structure of composite wallboards. The connecting structure comprises the composite wallboards and connecting assemblies, and every two adjacent composite wallboards are connected through the corresponding connecting assemblies. Each connecting assembly comprises a keel, a first hanging piece and a second hanging piece, every two adjacent composite wallboardsare connected with the first hanging pieces and the second hanging pieces respectively, the composite wallboards are connected to the keels in a hung mode through the first hanging pieces and the second hanging pieces, and therefore simple and rapid installation of the composite wallboards is achieved.

The invention relates to the technical field of assembly line conveying equipment, in particular to an assembly line plate overturning device. The assembly line plate overturning device structurally comprises a base support. A roller is rotationally connected to the upper side of the base support. Outer tooth rings are fixedly arranged on the outer edges of the two sides of the roller. Limiting gears are rotationally arranged at the four corners of the base support correspondingly and arranged on the lower side of the roller. The four limiting gears are engaged with the two outer tooth rings.One end of one limiting gear is in shaft connection with a turning motor. A first roller frame and a second roller frame are connected to the inner side of the roller in a sliding manner. Sliding blocks are arranged on the two sides of the first roller frame and the two sides of the second roller frame. Sliding grooves used in cooperation with the sliding blocks are formed in the inner side of theroller. Electric push rods are arranged on the back sides of the first roller frame and the second roller frame. The two electric push rods are oppositely and fixedly arranged on the inner side of the roller, and the telescopic ends of the two electric push rods are connected with the first roller frame and the second roller frame correspondingly.

The invention discloses a polishing device for iron handicraft processing. The polishing device comprises a base; hydraulic cylinders are installed at the two sides of the upper surface of the base correspondingly; hydraulic telescopic rods are arranged at the tops of the hydraulic cylinders; a supporting plate is installed at the top ends of the hydraulic telescopic rods; an mounting plate is arranged right over the supporting plate; limiting columns are mounted at the four corners of the lower surface of the mounting plate correspondingly; the bottom ends of the limiting columns penetrate through through holes formed in the supporting plate to be connected with the limiting plate; the outer sides of the outer walls of the limiting columns are sleeved with springs; the springs are locatedbetween the mounting plate and the supporting plate; and side plates are mounted at the two sides of the upper surface of the supporting plate correspondingly. The polishing device for iron handicraft processing solves the problem that an existing polishing device for iron handicraft processing is poor in stability when polishing handicrafts. According to the polishing device, the damping effectcan be effectively achieved when a double-output motor works, the stability of the polishing device during artware polishing is improved, and therefore the artware polishing quality is improved, and the practicability is high.

The invention discloses a corrugation elimination device for thin films, and relates to the technical field of thin film production equipment. In order to achieve the aims that corrugation eliminationeffect is guaranteed and meanwhile products are prevented from being influenced by temperature sudden decrease or sudden increase, the corrugation elimination device specifically comprises a coolingchamber, a hot air chamber and a temperature control mechanism; the cooling chamber is located on one side of the hot air chamber; the temperature control mechanism comprises a refrigerating machine,a heating machine and two temperature control channels; the outer walls of the bottoms of the refrigerating machine and the heating machine are fixed to the outer walls of the tops of the cooling chamber and the hot air chamber through screws correspondingly; and the top ends of the two temperature control channels are connected to the output ends of the refrigerating machine and the heating machine correspondingly. The temperature is controlled in a manner of alleviating the temperature difference, the corrugation elimination effect is guaranteed, and meanwhile products are prevented from being influenced by temperature sudden decrease or sudden increase; and specifically, through the arrangement of a lower air flue and an auxiliary air supply mechanism, the temperature difference betweenthe temperature of the positions, close to inlets and outlets, in the cooling chamber and the hot air chamber and the outside temperature can be reduced, and the treatment effect and reliability areimproved.

The invention relates to the technical field of power distribution equipment, especially to a hanging type rainproof transformer. The hanging type rainproof transformer comprises a transformer box internally provided with a transformer body, a box door is arranged on the front side of the transformer box, heat dissipation grooves are formed in the left side and the right side of the transformer box, and the hanging type rainproof transformer further comprises a rainproof cover, a lifting control piece, a lifting transmission piece, lifting pieces, hanging frames and a base. The top of the transformer box is connected with the rainproof cover; the bottom of the transformer box is connected with the lifting control piece; the rear part of the transformer box is connected with the two liftingpieces which are arranged side by side; the lifting control piece is in transmission connection with the lifting pieces through the lifting transmission piece; the lifting transmission piece is connected to the rear part of the transformer box; the two lifting pieces are connected to the two hanging frames in a matched mode. The rainproof cover is arranged at the top of the transformer box in thetransformer box, the rainproof effect is achieved, and rainwater is prevented from permeating into the transformer box to damage the transformer body.

The invention discloses a pipe cleaner tool. The pipe cleaner tool comprises a base, wherein universal wheels are arranged at the middle part of one side of the bottom end of the base, wheels are arranged at the other side of the bottom end of the base, sleeves are welded to the four corners of the top end of the base, inserting rods are inserted into the tops of the sleeves through adjusting nuts, and connecting plates are arranged between the top ends of the two inserting rods; and a material cleaning pipe is welded to the top ends of the two connecting plates through supporting pipes. The pipe cleaner tool is ingenious in structural design and convenient to operate, tightness between the sleeves and the inserting rods is realized by rotating the adjusting nuts, so that adjustment for the horizontal height of the material cleaning pipe is realized, the pipe cleaner tool can be applied to butt joint for pipe cleaners with different heights, the pipe cleaners can be prevented from sliding in the material cleaning pipe by arranging limiting barrier strips, so that the use safety is improved, and through the arrangement for the material cleaning pipe with a smooth surface and a circular tubular structure, the pipe cleaners can be conveniently placed on the material cleaning pipe for cleaning, garbage falls into a waste material hopper, and centralized treatment for waste oil and waste materials can be realized.

The clinical antenatal diagnosis and examination equipment for the obstetrics and gynecology department comprises a bearing base plate, and a plurality of bearing rolling wheels are rotationally installed at the bottom of the bearing base plate; a bearing unit used for bearing a user is arranged in the middle of the bearing base plate and comprises a lifting air cylinder, the output end of the lifting air cylinder is fixedly connected with a bearing frame, a bearing plate is arranged above the bearing frame, the top of the bearing plate is fixedly connected with a soft cushion, the bearing plate is divided into a front section plate, and a rear section plate is arranged on the front section plate. A middle section plate and a rear section plate; a patient is supported through the supporting unit, the height of the supporting unit is adjusted through the lifting air cylinder and the like, and adjustment of the horizontal height of the patient is achieved; according to the bearing unit, the bearing plate is divided into the front section plate, the middle section plate and the rear section plate, the front section plate and the middle section plate are arranged in a mutual rotation mode, the front section plate can rotate, the front section plate can be converted in a horizontal and inclined state, and a patient can be conveniently supported when sitting up.

The invention discloses a corrugation elimination device for film, which relates to the technical field of film production equipment; in order to avoid the influence of the product due to a sudden drop or rise in temperature while ensuring the corrugation elimination effect; it specifically includes a cooling chamber and a hot air chamber and a temperature control mechanism, the cooling chamber is located on one side of the hot air chamber, the temperature control mechanism includes a refrigerator, a heating machine and two temperature control channels, and the bottom outer walls of the refrigerator and the heating machine are respectively fixed to the cooling chamber by screws and the top outer wall of the hot air chamber; the tops of the two temperature control passages are respectively connected to the output ends of the refrigerator and the heater. The present invention controls the temperature by easing the temperature difference, while ensuring the elimination effect of the ripples, it avoids the product being affected by the sudden drop or rise in temperature; specifically, by setting the lower air duct and the auxiliary air supply mechanism, the cooling chamber and the cooling chamber can be reduced. The temperature difference between the temperature at the position near the entrance and exit of the hot air chamber and the outside temperature improves the treatment effect and reliability.

The invention discloses a bottle arrangement device for special-shaped soy sauce bottles. The bottle arrangement device comprises a rack. The rack is provided with a conveying belt. A filling machine, a capping machine, a shifting fork and an ink-jet printing machine are sequentially arranged above the conveying belt. The special-shaped soy sauce bottles are located on the conveying belt. The special-shaped soy sauce bottles are driven by the conveying belt to pass through the filling machine, the capping machine, the shifting fork and the ink-jet printing machine in sequence. The filling machine is used for quantitative hot filling of soy sauce into the special-shaped soy sauce bottles. The capping machine is used for performing extrusion and pressing bottle caps onto the special-shaped soy sauce bottles. The shifting fork is used for shifting bottle openings of the special-shaped soy sauce bottles to the direction parallel to the conveying belt. According to the bottle arrangement device for the special-shaped soy sauce bottles, the special-shaped soy sauce bottles can be arrayed neatly after being filled with the soy sauce, and the phenomenon of ink-jet coding leakage is avoided.

The invention provides an automatic removal and deodorization device for poultry breeding. The device comprises a shell, a handrail fixedly connected to the side wall of the shell and four walking wheels rotatably connected to the lower end of the shell. An excrement shoveling device, a water spray deodorization device and a sweeping device are arranged in an inner cavity of the shell. According to the automatic removal and deodorization device, the defects in the prior art are overcome, and the device is reasonable in design and compact in structure; breeding personnel shovel excrement, waterwith deodorant is sprayed to the ground of a poultry house after shoveling, and finally the ground is swept. Sewage flows through field ditches in the poultry house and is discharged, the environmentquality of the poultry house is greatly improved, poultry cannot be injured, and healthy development of the poultry is guaranteed.

The invention discloses a hoisting device for building construction. The hoisting device for building construction comprises a supporting frame and a supporting arm, a stand is fixed to the top of thesupporting frame, a first motor and a second motor are fixedly welded to the upper surface of the stand, a large winding drum and a small winding drum are rotationally connected to the top of the stand, an output shaft of the first motor is in transmission connection with the large winding drum through a first belt, an output shaft of the second motor is in transmission connection with the smallwinding drum through a second belt, the supporting arm is fixed to one end of the top of the supporting frame, a roller is rotationally connected to the top end of the supporting arm, a first steel wire rope is wound around the large winding drum, one end of the first steel wire rope is wound around the roller, and a guide rail is fixedly welded to the bottom of the supporting arm. According to the hoisting device for building construction, the small winding drum retracts the second steel wire rope, so that a slider is pulled to move downwards along a sliding groove, at the moment, a hook pulls the first steel wire rope to move downwards, and other tools are not needed for pulling a hoisting rope into a room.

The invention discloses a tensioning device for applying a pretensioning force to fiber cloth materials and a tensioning method of the tensioning device. The tensioning device comprises a slide way (11), wherein a rolling groove (2) is arranged in the slide way (11) and can freely slide in the slide way (11); two rolling shafts (4) are arranged in the rolling groove (2), can roll along the horizontal direction of the rolling groove (2), and is used for winding the fiber cloth materials so that the fiber cloth materials are locked and fixed; an opening (8) is formed in an upper flange of the rolling groove (2); a base plate (3) is arranged at a position, which is close to the upper flange of a tensioning end, of the rolling groove (2); an L-shaped baffle (5) is arranged at the tensioning end of the rolling groove (2) and is abutted to the rolling shafts (4); and by the L-shaped baffle (5), end rigidity is improved. A fiber cloth material anchoring effect is excellent, through displacement control loading after tensioning, the outer end of a bolt bar is connected with a sensor, magnitude of a tensioning force can be measured directly, the problem that when fiber cloth materials are tensioned by another device, force is difficult to measure is solved, the fiber cloth materials are wound on the rolling shafts, and the problem that the fiber cloth materials cannot be stressed evenly is solved.

The invention discloses an automatic gearbox oil changing machine, and relates to an automobile maintenance tool. The automatic gearbox oil changing machine comprises a sealing bottom, a first pressure sensor, a second pressure sensor, a first pipe and a second pipe, wherein the first pressure sensor is arranged on the sealing bottom, the second pressure sensor is arranged on the sealing bottom, afirst cavity is defined by one end of the first pipe and the sealing bottom, the first pipe is nested in the second pipe, a second cavity is defined by the first pipe, the sealing bottom and the second pipe, the first pressure sensor communicates with the first cavity, and the second pressure sensor communicates with the second cavity. The automatic gearbox oil changing machine has the advantagesthat the first pressure sensor and the second pressure sensor can reduce an influence degree of external vibration, external airflow and bubbles in a liquid, and liquid metering errors can be reduced.