62results about How to "Convenient elastic" patented technology

The invention discloses a multi-angle overturning welding device for a long-distance large-diameter jacking pipe, relates to the technical field of jacking pipe welding equipment, and solves the problems that according to an existing welding device, a welder needs to manually knock a welding slag coating after welding, the efficiency is low, manpower is wasted, and hand fatigue of the welder is likely to be caused by frequent knocking actions. The multi-angle overturning welding device for the long-distance large-diameter jacking pipe comprises a base and a positioning square rod, wherein thebase comprises a V-shaped supporting plate, vertical supporting rods, a lead screw and a connecting top plate, the base is integrally of an I-shaped structure, and the two vertical supporting rods aresymmetrically welded to the middles of the front side and the rear side of the base; and two gear rings are rotationally inserted and supported at the top ends of the two vertical supporting rods, and the front end side gear ring is movably mounted. According to the multi-angle overturning welding device, a knocking rod can slide left and right along a rail square rod through a square sliding sleeve to be adjusted and is inserted and positioned through the rail square rod, and the device is suitable for knocking welding slag on butt welds at different positions, is flexible to use and wide inapplication.

The dental floss opener for dental floss device includes floss-hooking telescopic rod, dental floss device body, rotating screw, connecting sleeve, rotary handlebar, and lower cover. It tightens or loosens the dental floss through fitting the square body of the floss-hooking telescopic rod and the square hole in the dental floss device body, screwing the rotating screw onto the floss-hooking telescopic rod, making the lower part of the screw contact to the elastic hook of the dental floss device body, embedding the bottom of the rotating screw inside the hole of the rotary handlebar, screwing the lower cover to the rotating screw, and thus driving the floss-hooking telescopic rod to stretch out and draw back.

The invention relates to a power catwalk machine capable of feeding and throwing three drilling and exploitation tubular columns, and belongs to the field of petroleum drilling and exploitation equipment. The power catwalk machine comprises a base rack, a supporting arm, a ramp, a sliding arm and a tackle assembly. A containing groove is formed in the base rack, and a supporting arm sliding rail is arranged in the containing groove. One end of the supporting arm is in sliding connection to the supporting arm sliding rail. One end of the ramp is in pin connection with one end of the base rack,and a sliding arm sliding rail is arranged on the ramp. The other end of the supporting arm and the bottom of one end of the sliding arm are hinged, the other end of the sliding arm is arranged on thesliding arm sliding rail in a sliding manner, three V-shaped sliding grooves are formed in the sliding arm, communicating turnover openings are formed in the three V-shaped sliding grooves, and pipeturnover devices used for turning over the tubular columns placed in the three V-shaped sliding grooves out of the sliding arm are arranged in the turnover openings. The tackle assembly is in slidingconnection to the three V-shaped sliding grooves in a sliding manner. Through the power catwalk machine, three drilling and exploitation tubular columns can be fed and thrown at a time, the manner offeeding and throwing only one drilling and exploitation tubular column at a time in tradition is changed, and work efficiency is improved.

The invention relates to the field of mechanical manufacturing, in particular to a non-contact type rotation part shape error precision detection device and a detection method. The detection device comprises a worktable (1), a clamping device, an obtaining device, an adjusting device, a controller (3) and a computer (4), wherein the clamping device is arranged on the worktable (1) and used for fixing a workpiece (2) to be detected and driving the workpiece (2) to be detected to rotate axially in the Z direction, the obtaining device is arranged on the worktable (1), can be adjusted in the Y direction and the Z direction and is used for obtaining the shape information of the workpiece (2) to be detected, and the adjusting device is used for loosening and clamping the clamping device. The clamping device, the information obtaining device and the adjusting device are respectively and electrically connected with the controller (3). The controller (3) and the information obtaining device are electrically connected with the computer (4). The detection device is low in price, easy to operate, low in requirement on environment and high in detection efficiency, and the detection method is good in detection effect.

The invention provides an electric cabinet convenient in installation and maintenance. The electric cabinet comprises a handle, a mechanical lock, a cabinet door, hinges, an electric cabinet body, a permanent seat, linear sliding rails, U-shaped stainless steel sliding blocks, regulation bolts, linkage stainless steel seats, condenser pipes, an internal electric fixing adjustable classification plate structure, a bottom adjustable position adjustment rack, an anti-confusion electric classification observation sheet structure and convenient installation, movement and sliding hanging rack, wherein the handle is connected to the left middle position of the cabinet door through bolts. The electric cabinet is provided with the linear sliding rails, the U-shaped stainless steel sliding blocks, regulation bolts, lifting handles and push and pull plates to be favorable for loosening the regulation bolts, the lifting handles are held with hands to pull the push and pull plates, at the time, thepush and pull plates drive the U-shaped stainless steel sliding blocks to slide between the linear sliding rails so as to pull the push and pull plates, so that each electric cabinet can be more favorably installed or each electric cabinet is maintained so as to bring better maintenance, and use efficiency is improved.

The invention discloses a multifunctional locking nut. The multifunctional locking nut comprises an anti-theft cylindrical part, a locking nut, an internally-arranged spring, a limiting step, a rotating sleeving part and a hexagonal locking sleeve. According to the multifunctional lock nut, an internally-arranged spring sleeving ring is added to the nut, thus the situation that the nut is loosened due to the fact that a bolt and the nut are subjected to machine vibration for a long time can be effectively prevented, and furthermore, the locking effect of the nut is enhanced. A rotating sleeving part device is added to the locking nut, thus the internally-arranged spring can be loosened and tightened more conveniently, and furthermore, the locking nut is more convenient to use. By means of the structural manner that the hexagonal locking sleeve is matched with a cylinder with an internal thread, after the nut is locked, the hexagonal locking sleeve is taken down, thus the locking nut cannot be taken down with a common spanner, and furthermore, the locking nut has the anti-theft function.

The invention discloses an easily-screwed screw. The easily-screwed screw comprises a screw head and a screw rod. The screw head is in a flat shape; the screw rod is arranged on the screw head and provided with threads; the outer side wall of the screw head is provided with a protrusion, and the protrusion is provided with a cross recess or a hexagonal counter sink and is in a square shape. According to the easily-screwed screw, the protrusion is arranged on the outer side wall of the screw head and provided with the cross recess or the hexagonal counter sink, which supports special tools, and the protrusion can help a user to tighten the screw conveniently by hand, therefore, the easily-screwed screw can ensure the usage of the original special tools and meanwhile can be easily screwed up without the special tools.

The invention discloses a printing dyeing device for textile processing with a function of a wide application range. The device comprises a bottom box, the top of the bottom box is fixedly connected with a box body, one side of the top of the bottom box is fixedly connected with a fixing plate, the top of the fixing plate is fixedly connected with a motor box, the inner wall of the motor box is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with a first belt wheel, the surface of the first belt wheel is connected with a second belt wheel in a transmission mode through a belt, the shaft center portion of the second belt wheel is fixedly connected with a rotating shaft, and the surface of the rotating shaft is rotationally connected with a firstsupporting frame. The invention relates to the technical field of textile printing and dyeing. The printing dyeing device for textile processing with the function of the wide application range has afunction of automatically controlling the strength of pad dyeing, can detect and control sizes of the pressure of pad dyeing in real time, provide convenience for the content of dyeing solution in different fabrics, the application range is wider, and the practicability and the dyeing effect of evenness padder are greatly improved.

The invention discloses a knitter for a circular knitting machine. According to the technical scheme, the knitter is characterized by comprising a knitter body and a material hanging frame arranged onthe upper side of the knitter body, the material hanging frame comprises a material hanging ring, connecting rods and a disk, the material hanging ring and the disk are fixed through the connecting rods, a driving part is arranged on the upper side of the knitter body, the driving part drives the material hanging frame to adjust the height, and a plurality of yarn hanging parts are detachably connected to the material hanging frame through a locking part. When the thread passing length needs to be adjusted through the height and position of bobbins and the tightness of a braided fabric is adjusted, the material hanging frame can be adjusted through the driving part to rise and fall; when the material hanging frame rises and falls, the bobbins in the yarn hanging parts are driven to adjustthe height, the height fine adjustment and angle adjustment can also be conducted on the bobbins on the yarn hanging parts, and the knitter is convenient to adjust.

The invention relates to the technical field of medical wristlets, in particular to a pediatric medical wristlet. The pediatric medical wristlet comprises a wristlet body; grooves are formed in one end of the wristlet body at equal distance; a fastening mechanism is arranged at the other end of the wristlet body, and comprises a connecting plate fixedly connected with the wristlet body; a first supporting plate is arranged at one end of the upper side of the connecting plate, a second supporting plate is arranged at the other end of the upper side of the connecting plate, and the height of thefirst supporting plate and the height of the second supporting plate are matched with the thickness of the wristlet body; a clamping cover is hinged onto the first supporting plate, a protruding strip is arranged at the lower end of the clamping cover, and the size of the protruding strip is matched with the size of the groove; a clamping block is arranged on the lower side of the end, away fromthe hinged portion, of the clamping cover, a clamping groove is formed in the first supporting plate, a limiting mechanism is arranged on the first supporting plate, a fixing ring is slidingly arranged at the end, away from the grooves, of the wristlet body, and a label frame is arranged in the upper middle portion of the wristlet body. The pediatric medical wristlet has the advantage that the tightness degree of the wristlet can be conveniently adjusted.

The invention relates to a disassembly and assembly tool for a brake disc installation flange. The disassembly and assembly tool includes an arc-shaped plate, a rod, a gear, and a sleeve; teeth A are arranged on the outer periphery of the arc-shaped plate, and a sliding hole is opened on the rod. A positioning block is installed in the sliding hole, and the positioning block slides axially along the rod; the tooth B of the gear matches the tooth A of the arc plate; fix the arc plate and the brake disc mounting flange, and adjust the gear to mesh with the outer circumference of the arc plate , the rocker arm drives the gear to rotate, thereby pulling the rod, and the sleeve on the rod drives the flange nut, which overcomes that when the flange nut is disassembled with a wrench, the mounting flange of the axle and brake disc rotates with the direction of the wrench, so that it cannot The problem of applying force; at the same time, it has the effect of amplifying the torque, which is convenient for loosening and tightening flange nuts, facilitating disassembly and assembly of brake disc mounting flanges, and improving work efficiency.

The invention relates to the field of mechanical manufacturing, in particular to a non-contact type rotation part shape error precision detection device and a detection method. The detection device comprises a worktable (1), a clamping device, an obtaining device, an adjusting device, a controller (3) and a computer (4), wherein the clamping device is arranged on the worktable (1) and used for fixing a workpiece (2) to be detected and driving the workpiece (2) to be detected to rotate axially in the Z direction, the obtaining device is arranged on the worktable (1), can be adjusted in the Y direction and the Z direction and is used for obtaining the shape information of the workpiece (2) to be detected, and the adjusting device is used for loosening and clamping the clamping device. The clamping device, the information obtaining device and the adjusting device are respectively and electrically connected with the controller (3). The controller (3) and the information obtaining device are electrically connected with the computer (4). The detection device is low in price, easy to operate, low in requirement on environment and high in detection efficiency, and the detection method is good in detection effect.

A hydrostatic radial piston machine includes a radial cylinder block with cylinder bores which extend from an outer circumferential surface of the radial cylinder block into an interior of the radial cylinder block a number of pistons which corresponds to the number of cylinder bores; a cam ring and ends of the pistons which face away from the radial cylinder piston block are supported movably on an inner circumferential surface of the radial cylinder block during a rotation of the radial cylinder block; two control plate elements which extend respectively with a face oriented towards the radial cylinder block towards a central plane of the radial cylinder block, which central plane is perpendicular to the rotation axis. Each control plate element includes a bearing portion in which radially acting forces are transferable to a respective mating surface in the housing or housing cover mounted in the housing.

The invention discloses a vernier caliper and a use method thereof. The vernier caliper comprises a main ruler, a vernier, a sliding assembly and a positioning column; the sliding assembly is locatedbetween the vernier and the main ruler; the vernier slidingly sleeves the main ruler; the main ruler is provided with a ruler body guide rail; the ruler body guide rail is matched with the sliding assembly; and the positioning column is arranged between the vernier and the main ruler and protrudes out from the vernier. The ruler body and the vernier of the vernier caliper can be in gapless fit with each other, so that the high-precision and stable linear movement of the ruler body and the vernier can be realized, and therefore, the stability and accuracy of measurement can be improved. The vernier caliper has the advantages of flexible structure design and convenience in installation and use.

The invention provides a portable tourniquet which comprises a tourniquet self-locked locking head body, a buffer layer, a tourniquet, a tourniquet holding part, a tourniquet fixing block, bolts, a tourniquet fixing hole, a first locking head, a second locking head, a thread, a first locking head accommodating groove, bolt fixing holes, a tourniquet holding part pull hole and a tourniquet pull groove, wherein the second locking head is fixedly mounted below the middle of the tourniquet self-locked locking head body; the first locking head accommodating groove is formed above the second locking head; the first locking head is mounted inside the first locking head accommodating groove. Due to adoption of the first locking head and the second locking head, the tourniquet can be tightened and released conveniently; due to adoption of the buffer layer, the tourniquet can be conveniently fixed; due to adoption of the tourniquet holding part mounted at one end of the tourniquet, the tourniquet can be conveniently inserted into the tourniquet self-locked locking head body; the portable tourniquet is simple in structure and reasonable in design; due to the flat and wide shape, the contact surface between the tourniquet and skin can be increased, and patients can be relieved from pain.

The invention relates to a bicycle, in particular to a bicycle adjustable in chain wheel tightness. An adjustable frame hanging lug is arranged on a rear axle fork frame of a bicycle body and comprises a rear fork hook with two ends connected with the rear axle fork frame and a rear axle hanging lug, two long oval holes arranged linearly are formed in the rear fork hook, a positioning bolt is arranged between the rear fork hook and the rear axle hanging lug, one end of the positioning bolt extends into the long oval holes of the rear fork hook and slide in the long oval holes, the other end of the positioning bolt is fixedly connected with the rear axle hanging lug, a jackscrew mechanism is fixed to the rear axle hanging lug, and the jackscrew front end of the jackscrew mechanism abuts against the rear fork hook. By means of the structure, the distance between the rear fork hook and the rear axle hanging lug can be conveniently changed by adjusting a jackscrew, a rear axle is installed on the rear axle hanging lug, and the rear fork hook is installed on the rear axle fork frame, so that the distance between a middle point of a five-way part and a middle point of the rear axle can be changed, and the chain wheel tightness can be conveniently adjusted.

The invention discloses an internal hexagonal general wrench. The internal hexagonal general wrench comprises a sleeve (2), a positioning sleeve housing (3) which is connected with the sleeve (2) in the form of a revolute pair and a positioning cap (1) which is connected with the sleeve (2) through a sliding pair, wherein a tenon (12) is arranged on the positioning cap (1); the tenon (12) is clamped in a slide slot (10) formed in the inner wall of the sleeve (2); the positioning cap (1) and the sleeve (2) can slide relatively; a bayonet pin (11) is arranged on the inner wall of the sleeve (2); the bayonet pin (11) is clamped in a ring slot (13) formed in the outer side of a working sleeve head; and the working sleeve head is formed by mutually nesting a plurality of hexagonal working sleeve heads. The internal hexagonal general wrench provided by the invention is reasonable in structural design and convenient to operate, is especially capable of being flexibly used for loosening and tightening bolts and screws in various models and different types, is high in universality and high in applicability and can solve the problems such as poor universality, a great size, large weight and inconvenience in carrying of a wrench in the prior art.

The invention discloses a lower limb nursing massaging apparatus for neurology department. The lower limb nursing massaging apparatus comprises a massaging apparatus main body, a leg massaging sleeve,a sliding rod, a locking piece, a telescopic air cylinder, a supporting arm, a control board, massaging heads, a seat cushion, a bracket, a lower base, a sliding sleeve, a connecting piece and bonding straps, wherein the bracket is arranged at the bottom of the massaging apparatus main body; the lower base is arranged at the top of the bracket; the seat cushion is arranged at the top of the lowerbase; the massaging heads are arranged in the seat cushion; the massaging heads are composed of servo motors, cams, connecting rods, mounting bases, silica gel heads and pressing blocks; the silica gel heads are arranged at the tops of the massaging heads; the pressing blocks are arranged at the bottoms of the silica gel heads; the pressing blocks are connected to the cams via the connecting rods; the servo motors are arranged at one side of the cams; the servo motors are arranged in the mounting bases in an embedded mode. The massaging device has functions of cushioning, conveniently adjusting and magnetic pressing; and using convenience is improved.

The invention discloses a microminiature four-wheel electric vehicle comfort chassis structure. The microminiature four-wheel electric vehicle comfort chassis structure comprises front wheels, a handle, an electric vehicle frame, a cushion, back wheels, an actuator, a rear axle, pedals, plate springs, a front axle, and a direction unit. The direction unit is fixedly installed on a connecting shaft of the front wheels, then connected with the front axle in a hinged mode, the direction unit is also connected with a diagonal draw bar, the other end of the diagonal draw bar is connected on a connecting plate, and the connecting plate is installed on the handle; the middle of the rear axle is provided with the actuator, and the tail end of the rear axle is provided with the back wheels; the front axle is connected with the rear axle through two plate springs distributed side by side, the electric vehicle frame is fixedly installed on the plate springs through a supporting frame, a storage battery frame is installed on the supporting frame, and the cushion is installed on the storage battery frame. The front end and the back end of the electric vehicle frame are provided with a front block plate and a back block plate correspondingly, and the pedals are installed on the middle of the bottom of the electric vehicle frame. The microminiature four-wheeled electric vehicle comfort chassis structure has the characteristics of being good in seismic resistance effect, light in weight, smooth and steady in driving, and small in jolt when moving on the rough road.

The invention provides an anti-disengaging detachable material returning air cap for a circulating fluidized bed boiler. The situations of loosening and disengaging of an air cap head caused by the impact of high-pressure head fluidized air are avoided, the air cap head can be conveniently loosened and tightened after being firmly clamped through a wrench, and circulating materials of the whole boiler can normally return. The anti-disengaging detachable material returning air cap comprises the air cap head and an air cap connecting pipe, wherein the lower end of the air cap head is in threaded connection with an upper joint of the air cap connecting pipe, and is arranged on the upper joint of the air cap connecting pipe in a sleeving manner; an air outlet is formed in the middle annular surface of the air cap head; a central hole of the air cap connecting pipe is communicated with a cavity formed by combining the air cap head and the air cap connecting pipe; the cavity is communicated with the air outlet. The anti-disengaging detachable material returning air cap is characterized in that an outer boss structure is arranged in the middle of the air cap connecting pipe; the upper end surface of the outer boss structure is of a planar structure; a spring washer is pressed between the bottom end surface of the air cap head and the upper end surface of the outer boss structure; two sides of an outer ring surface, corresponding to a threaded part, of the air cap head are machined to form the planar structures.

The invention discloses a unilateral limb restraint strap, which comprises a support body, which has a length direction, a width direction and a thickness direction which are intersected with one another, and the support body is used for supporting patient limbs; flexible side wings, which are arranged on the two side edges of the support body in the length direction and used for wrapping a patient limbs; and at least a pair of belt components, which are arranged at the end parts of the free ends of the flexible side wings, and the belt components are symmetrically connected to the flexible side wings. According to the invention, the body position of a patient can be rapidly placed and fixed, the safety of the patient is ensured to a certain degree, meanwhile, the opening efficiency of the restraint strap is improved, the opening time of the restraint strap is shortened, the restraint strap can be repeatedly used, the comfort of the patient is improved, and pressure sores are prevented. In the clinical application, the restraint strap is convenient to restrain, comfortable, clean, suitable for different crowds and different operations, capable of being widely popularized and used in the clinical application, the cost is low, the utilization rate is high, and suitable tightness for a patient is achieved.

The invention discloses a novel cup cover. The cup cover comprises a cover body I, a cover body II and a caliber adjusting mechanism, the cover body I and the cover body II are stacked vertically andcan rotate relative to each other, and the caliber adjusting mechanism comprises connecting rods I, connecting rods II and rubber balls; one end of each connecting rod I is connected with the inner wall of the cover body I, the other end of each connecting rod I is connected with the corresponding rubber ball, one end of each connecting rod II is connected with the inner wall of the cover body II,and the other end of each connecting rod II is connected with the corresponding rubber ball. The connecting rods I are hinged to the connecting rods II, the rubber balls are wrapped on the peripheries of the junctions between the connecting rods I and the connecting rods II, the ends, connected with the inner wall of the cover body I, of the connecting rods I are moved along with the rotation ofthe cover body I, and the ends, connected with the inner wall of the cover body II, of the connecting rods II are moved along with the rotation of the cover body II. When the cover body I and the cover body II are rotated in opposite directions, the connecting rods I and the connecting rods II get close to each other, the rubber balls are pushed toward the middle, that is to say that the rubber balls are moved in the direction close to a cup body, and thus the cup cover can be applied to containers of different calibers. The invention also provides a using method of the novel cup cover.

The invention discloses a water-cooled diesel engine rack, comprising a rack body. A support plate to support a diesel engine is arranged at the front end of the rack body; the rear end of the rack body is provided with a connection seat connected with two sides of a transmission case; the connection seat is provided with a receiving channel adapting to the front end of the transmission case; theconnection seat is provided with vertical plates adapting to the two sides of the transmission case and on the two sides of the receiving channel; the upper and lower portions of the two vertical plates are provided with first and second mounting holes connected with the two sides of the transmission case; two sides of the support plate are provided with adjusting holes which are extended along the length of the support plate and used for mounting the diesel engine; the top ends of the two vertical plates are provided with a hydraulic device bearing which can be adjusted up and down. The water-cooled diesel engine rack has good supporting firmness, good integrity and compact structure and allows mounting space to be fully utilized; the water-cooled diesel engine rack is convenient to connect and disconnect with the transmission case; a distance between the diesel engine and an input shaft of the transmission case is convenient to adjust.

The invention provides an electronic component fixing device which is convenient for clamping, and relates to the field of electronic components. The electronic component fixing device that is convenient for clamping includes a base, a box body is fixedly installed on the bottom of the base, and both sides of the bottom of the box body are interspersed with clamping rods, and one end of the clamping rod close to the box body runs through the box The bottom of the body and extends to the inside of the box. The electronic component fixing device that is convenient for clamping achieves It is convenient to buffer the insertion rod. The shock-absorbing spring resets the second permanent magnet, so that under the action of the spring rod, the slide plate is buffered, so that the insertion rod is buffered, and the anti-skid plate and the pressure plate are used to facilitate the electronic The clamping of the components facilitates the use of the user, thereby also improving the use efficiency of the electronic component fixing device.

The invention provides a motor wire end and outgoing wire twisting device, comprising rollers I, frame plate I, frame plate II, rollers II, a press rod, a cutter head, round-orifice posts, positioningbolts and pulleys. The motor wire end and outgoing wire twisting device has the advantages that the frame plate I is connected with the rollers I through mounting racks I, the frame plate II is connected with the rollers II through mounting racks II, a protective function is provided for wire twisting operation, and operational safety is enhanced; the press rod is arranged in a mounting hole, thecutter head is mounted on the lower end face of the press rod, a quick cutting function is provided for outgoing wires, cuts are neat, and next wire twisting is facilitated; the positioning bolts aremounted on the round-orifice posts, the pulleys are mounted in the round-orifice posts, a tension adjusting function is provided for the outgoing wires, and it is ensured that the outgoing wires aretensioned during twisting; the motor wire end and outgoing wire twisting device is convenient to use and operate, good in stability, and high in reliability.

The invention discloses a head-wearing illuminating lamp for vehicle repair. The head-wearing illuminating lamp comprises a head cover, wherein the front of the head cover is provided with a controller; the front of the controller is connected with a lamp cap through a damping shaft; both sides of the head cover are respectively provided with a lug; the back of the head cover is provided with a chuck; the upper part of the head cover is provided with a set of lifting handles; the lower position of the front of the head cover is provided with a steel wire hood; the middle part of the steel wire hood is provided with a steel framework; the steel framework is connected with a glass shade through a set of bolts; and a spongy cushion is attached to a circular notch in the lower position of the steel wire hood. The head-wearing illuminating lamp for vehicle repair has the conventional illumination function with longer illumination duration time; and the head-wearing illuminating lamp for vehicle repair has the function of protecting the face of the operating personnel, can prevent the chassis parts from dropping off and scratching or crushing the face of the operating personnel, and can also effectively prevent the chassis oil stains from dripping on the eyes of the operating personnel, thereby providing favorable protection for the operating personnel.

The invention relates to the field of inner hexagonal screw fasteners, in particular to an inner hexagonal screw fastener which comprises a telescopic mechanism, a hollow barrel, a stretching mechanism and a fastening mechanism and is used for fastening inner hexagonal screws. When common traditional inner hexagonal screw fasteners are used, many wrenches need to be carried due to different sizes of the inner hexagonal screw fasteners, in the using process, and due to the fact that too many inner hexagonal screw fasteners are arranged in a bag, it is troublesome to find out one size. According to the improved inner hexagonal screw fastener, a straight gear rotates to drive a telescopic rod to stretch out and draw back, then a wrench is driven to adjust different sizes, after the sizes are adjusted, the tightness degree is adjusted through a first nut on a broken nut, the telescopic rod is then clamped, a rotating handle drives the wrench to adjust the tightness of the inner hexagonal screw fastener, during use, a plurality of inner hexagonal screws with different sizes can be adjusted only with one wrench, and convenience and effectiveness are achieved during use.