61results about How to "Improve clamping effect" patented technology

The utility model relates to a refrigerator field especially relates to a wire harness positioning structure and refrigerator. Wire harness positioning structure includes buckle and base, and the hollow setting of buckle, the inner wall of buckle is used for fixed wire harness, and the outer wall of buckle is convex and sets up the limit bulge, base is connected in the refrigerator body, and the hollow setting of base, the inner wall of base is set up and limits the groove, and the buckle is connected in the base, and limit bulge and limit groove are connected. Its advantage lies in, limit bulge and limit groove can be mutually connected, and then realized the circumferential angle positioning between buckle and base, effectively prevented wire harness from rotating after installation, solved the problem that wire harness angle is uncontrollable in the prior art, and simultaneously, the joint cooperation also provided radial constraint, enhanced the connection strength and stability of overall structure, made it can better resist the impact and pressure produced in processes such as foaming process.

The utility model discloses a ground rail type conveying belt, which relates to the technical field of conveyors and comprises a ground rail trolley, two sliding rails are connected to the top of the ground rail trolley, supports are connected to two sides of the top of the ground rail trolley, servo electric cylinders are mounted above one sides of the two supports, and the output ends of the servo electric cylinders are connected with clamping plates. One side of the clamping plate is connected with a clamping pad, and the other side is connected with a roller. Through the arrangement of the support, the servo electric cylinder, the clamping plates and the sliding rails, after feeding, the output end of the servo electric cylinder drives the clamping plates to move, the clamping plates abut against goods, the phenomenon that the goods are collided or fall off due to displacement is avoided, the stability in the transferring process is improved, the clamping plates are n-shaped, collision between the clamping plates and a conveying belt is avoided, and the working efficiency is improved. The slide rails are arranged to assist in supporting the clamping plates; and the phenomena of collision and falling of the goods are effectively avoided.

The present application relates to the technical field of bogie welding, and discloses a welding device and a welding method for a cross beam of a city rail structure and a connecting seat, which comprises a rack, a supporting assembly, a positioning assembly, a clamping assembly and a welding robot, and the supporting roller is used for supporting the cross beam. The positioning assembly is used for tightly pressing the butt joint groove between the cross beam and the connecting seat, so as to ensure that there is no deviation at the butt joint. The rotating roller is rotatably connected to the output end of the lifting driving source, one end of the two split gears is rotatably connected, the split gear is provided with a chuck and a guide, under the action of the lifting driving source, the guide is slidably connected with the rotating roller, so that the other end of the two split gears is closed, and the chuck is used for clamping the cross beam. Through the processes of feeding, positioning, clamping and fixing and welding, automatic welding of the butt joint weld between the connecting seat and the cross beam is realized, the traditional manual handheld welding gun operation mode is replaced, the single-piece welding working hours are greatly shortened, the labor intensity is reduced, and the welding operation efficiency is improved.

The application provides a self-biting sectional pressing belt of a pressing belt conveyor and belongs to the technical field of conveying devices.The self-biting sectional pressing belt comprises a conveying belt mechanism and a pressing belt mechanism, the conveying belt mechanism and the pressing belt mechanism are in abutment, the pressing belt mechanism comprises a plurality of sectional belts, the sectional belts are provided with a female end and a male end along the width direction of the sectional belts, and the female end and the male end of two adjacent sectional belts are detachably connected.The self-biting sectional pressing belt has the advantages that after the sectional belt contacts the conveying belt, the closed treatment can be firstly realized, the sectional belt can press the conveying belt under the action of external pressure, the internal sealing state can be maintained at all times when the continuous angle and height change, and the sectional belts are assembled in a splicing mode, so that the replacement operation can be rapidly performed when the sectional belt is damaged.

This utility model provides a hydraulic locking device for positioning heavy cargo on ships, belonging to the field of cargo positioning and locking technology. It includes two fixed seats; each fixed seat is secured to the ship by four fixing screws. A base block slides on the fixed seat, and a wooden compression block is provided inside the base block. A first hydraulic cylinder on the fixed seat drives the base block to move. A second hydraulic cylinder is hinged to the base block, and its extended end is connected to a connecting seat. Steel wire ropes are connected to the front and rear connecting seats respectively. A guide rod is welded to the base block, and a hexagonal adjustment groove is provided at the adjustment point of the fixing screw. An auxiliary groove is opened on the fixed seat to hide the fixing screw. This device achieves double locking through the compression block and steel wire rope, improving the fixing stability. The wooden compression block prevents damage to the cargo, the guide rod ensures structural stability, and the auxiliary groove facilitates timely detection of screw loosening, solving the problems of poor fixing effect, fragile cargo, and difficulty in detecting component loosening in existing devices.

The utility model discloses a circuit breaker housing and an installation back frame, the circuit breaker housing comprises a housing main body, one side of the housing main body is provided with an installation groove, the surface of the installation groove is fixedly connected with connection insertion sheets, the number of the connection insertion sheets is two, and the connection insertion sheets are symmetrically distributed in the installation groove. First clamping grooves are formed in the sides, close to the mounting groove, of the top and the bottom of the shell body, and guide-in slopes are arranged on the sides, close to the back face of the shell body, of the clamping grooves. The back frame comprises the circuit breaker shell and further comprises a back plate, the section of the back plate is in a] shape, one side of the back plate is symmetrically and fixedly connected with first buckle plates of the second clamping grooves, the top and the bottom of the back plate are fixedly connected with second buckle plates of the first clamping grooves, and the surface of the back plate is further provided with mounting holes. The utility model relates to the technical field of circuit breaker fixation. According to the circuit breaker shell and the mounting back frame, the mounting stability is improved, and mounting is facilitated.

The application discloses a clamping mechanism and relates to the technical field of workpiece clamping. The clamping mechanism comprises a rack, a bearing assembly and a buckling assembly are arranged on the rack, the bearing assembly comprises a first bearing seat, the buckling assembly comprises a buckling block which is arranged to be movable along the direction close to or away from the first bearing seat, a first driving module for driving the buckling block to move, and the buckling block has a clamping position in the movement stroke of the buckling block, and the clamping position is in positive butt joint with the first bearing seat. The clamping mechanism can buckle the workpiece on the first bearing seat in the movement stroke of the buckling block, so that the automatic clamping of the workpiece is realized, the clamping effect of the workpiece is improved, the buckling block can be matched with a machine tool and the automatic production of the workpiece is realized, and the production efficiency of the workpiece is effectively improved.

The utility model discloses a polar plug with overcurrent protection device belongs to plug technical field, the utility model discloses a shell, inner core, fuse tube and electric wire, the shell is the casing of two ends opening, the electric wire passes through the shell tail narrow mouth, and the shell head wide mouth is used for the inner core pressure, the inner core is flat base, and the external contour of inner core corresponds with the internal contour of shell, so that the inner core pressure combines into integral structure after the shell, the opposite side wall of inner core rear opening end extends two mutually symmetrical wrinkle clamps, and the electric wire of stretching into the shell inside is installed between two wrinkle clamps. The utility model discloses when the both ends of fuse tube are installed in front clamping piece and rear clamping piece respectively, two arc clamping pieces and two arc side clamping pieces are clamped to the copper cap of both ends of fuse tube, realize stable connection, when the inner core pressure forms integral in the shell, two wrinkle clamps are clamped to the electric wire outer wall under the extrusion of shell inner wall, realize the clamping and stable installation of electric wire.

The utility model discloses a blade tip clamping device based on wind power generation maintenance, relates to the technical field of wind power generation maintenance equipment, and aims to solve the technical problem that the current clamping device has a poor blade tip clamping effect, the blade tip clamping device comprises a fixed bracket, and mounting frames are arranged on two sides in the fixed bracket in a sliding manner. According to the wind turbine blade tip clamping device, the clamping frame, the jacking rod, the conduction frame, the second electric hydraulic push rod, the positioning toothed plate and the matching toothed plate are designed, so that when a blade tip of a wind turbine blade is clamped, the clamping frame can be pushed to move towards the blade tip through the first electric hydraulic push rod on the fixing support; at the moment, the circular jacking blocks of the jacking rods on the clamping frame can make contact with different local areas of the surface of the blade tip through rubber pads, the jacking rods can slide to different degrees, and then the jacking rods can be combined to form a shape matched with the surface of the blade tip.

The utility model discloses a rotatable prism combination device belongs to prism adjusting mechanical technical field. The device includes prism adjusting subassembly and base fixed component: in prism adjusting subassembly, the fixed seat of bottom plate top installs first motor, and its output shaft connects the revolving stage, and the second motor output shaft of revolving stage top is fixedly connected with prism, realizes the independent electric regulation of prism in horizontal plane and vertical plane, the base of base fixed component is equipped with the placement groove, and the built -in two -way threaded rod of third motor drive, the sliding block on threaded rod connects the push -plate, and the push -plate can clean the placement groove impurity when moving, and through the linkage of gear and tooth groove drives the opposite movement of baffle, and the spring is fixed to the bottom plate that is placed in the placement groove. The device is through the electric regulation promotion angle control precision, through the automatic cleaning and linkage clamping and enhances the installation stability, is applicable to high -precision optical experiment, surveying and mapping etc.

The large die spotting machine with the rotary workbench comprises a base, a left machine frame, a right machine frame, a sliding table, an upper platform, a lower platform, a movable table, the rotary workbench and the like, the left machine frame and the right machine frame are arranged at the two ends of the base respectively, and the upper end of the left machine frame and the upper end of the right machine frame are connected with a top cover. One end of the upper platform is hinged to one end of the sliding table through a hinge, the lower platform is arranged on the base, the moving table is arranged on the lower platform, a rotating shaft is arranged on the center bottom face of the rotating workbench, and the rotating workbench is rotationally installed on the moving table through the rotating shaft. According to the utility model, the positioning precision is less than 0.05, the maximum rotation capacity of the equipment reaches 40 tons, the maximum static pressure bearing capacity reaches 600 tons, the die assembly of single-color, double-color and three-color dies can be met, the multi-purpose of one machine is realized, and the production efficiency is improved. The problems that an existing mold closing machine cannot achieve mold closing of a single-color mold, a double-color mold and a three-color mold on one device and a traditional mold closing machine can only conduct mold closing on one mold at a time are solved.

The reliable-sealing food processor comprises an axially-through cup body, a heating disc arranged at an opening in the bottom of the cup body and a cup base arranged below the cup body, the heating disc and the cup base are fixed through screws and clamp the cup body up and down, an outer sealing ring is arranged between the bottom face of the cup body and the cup base, and the outer sealing ring is connected with the cup base. The bottom face of the cup body is provided with a plurality of protruding parts distributed in the circumferential direction of the cup body, and the protruding parts abut against the upper surface of the outer sealing ring and are in interference fit with the upper surface of the outer sealing ring. The convex part on the bottom surface of the cup body is used for extruding the outer sealing ring, the outer sealing ring can be prevented from shifting in the assembling process by increasing the compression amount of the outer sealing ring, and the sealing reliability between the cup body and the cup base is ensured.

The utility model relates to the technical field of clamp locking, disclose a kind of aircraft target calibration clamp locking mechanism, including fixed plate, the left side of the fixed plate is provided with aircraft target calibration clamp main body, the left side of the aircraft target calibration clamp main body is provided with aircraft fixed block.The aircraft target calibration clamp locking mechanism is provided with threaded sleeve and thread groove by setting, rotates rotating block, rotating block drives bidirectional threaded rod to rotate in the inside of thread groove, bidirectional threaded rod can make threaded sleeve resist fixed plate and move in the inside of thread groove, so that fixed plate is pulled by locking rod and moves close to aircraft fixed block by pressing block, so that pressing block and baffle can be clamped to aircraft fixed block and aircraft target calibration clamp main body, so that aircraft target calibration clamp main body and aircraft fixed block can be clamped, aircraft target calibration clamp main body and aircraft fixed block can be locked, the problem that it is not convenient to lock target calibration clamp according to the height of aircraft fixed block is solved, and flexibility is poor, there is greater limit.

The utility model discloses a clamping device convenient for multi-surface processing, which comprises a clamping mechanism, a fixing mechanism and a rotating mechanism, the clamping device convenient for multi-surface processing is provided with the clamping mechanism, the fixing mechanism and the rotating mechanism, and the clamping mechanism is provided with a base plate and a plurality of clamping grooves. A plurality of profiles can be loaded on the base plate through cooperation with the clamping groove, the stable clamping effect is achieved through the fixing function of the fixing mechanism, the two ends of the clamping groove are provided with a first machining opening and a second machining opening correspondingly, and the rotating mechanism can be used for driving the base plate to rotate. And therefore, the positions of the first machining opening and the second machining opening are switched on the same side of the base plate, the machining procedures of the two ends of the sectional material are rapidly connected, the step of re-clamping each sectional material after shutdown is omitted, and the machining efficiency of the sectional material is greatly improved by avoiding repeated clamping.

The utility model relates to gas meter shell processing technical field discloses a kind of clamping devices for gas meter aluminum shell finish machining, including bottom plate, the upper surface of the bottom plate is fixedly connected with workstation, the inside fixed connection of the workstation has motor, the output of the motor is fixedly provided with screw rod, the outer wall of the screw rod is threadedly connected with sliding block, the inside sliding connection of the sliding block has limit strip, the upper surface of the sliding block is fixedly connected with limit frame, the inside sliding connection of the limit frame has slide axle, the outer wall of the slide axle is fixedly connected with pressing plate, the upper surface of the bottom plate is provided with limit component. In the utility model, the rotation of screw rod can be driven by starting motor, the mutual cooperation between sliding block, limit strip, limit frame, slide axle and pressing plate can drive pressing plate to limit shell, achieve the effect of automatic positioning of shell, improve the stability of gas meter shell processing.

This utility model discloses a hydraulic self-centering vise, including a vise clamping block base. A cross slide rail extending along the length direction is provided on the vise clamping block base. A hydraulic cylinder is fixed to the bottom of the vise clamping block base. A left clamping block assembly is slidably connected to the left side of the cross slide rail, and a right clamping block assembly is slidably connected to the right side of the cross slide rail. The left and right clamping block assemblies are mirror images of each other and are used to clamp products. A push block capable of vertical movement is connected to the piston rod of the hydraulic cylinder. The push block includes a push seat and a T-shaped inclined slide block. The upper end of the push seat is an arrowhead section. An inclined block is mirrored on both sides of the arrowhead section. An inclined rod connects the inclined block and the arrowhead section. The inclined rod and the inclined block cooperate to form the T-shaped inclined slide block. Inclined grooves that cooperate with the T-shaped inclined slide block are provided on the sides of the left and right clamping block assemblies. This structure shortens the operation time, has fewer parts, and provides a more uniform clamping force.

An electronic device includes a housing, a first substrate disposed in an internal space of the housing, a conductive structure disposed at a location isolated from the first substrate, a second substrate electrically connected to the conductive structure and the first substrate, and an electrical connection member electrically connecting the second substrate to the conductive structure. The electrical connection member may include a first fixing portion fixed to the conductive structure, a second fixing portion fixed to the second substrate, and a connection portion connecting the first fixing portion and the second fixing portion. The first fixing portion includes a first bent portion bent along a first bent line from a neck portion, that is, a boundary area with the connection portion, and a second bent portion bent along a second bent line from the first bent portion. The first bent portion is bent in a first direction becoming distant from the conductive structure, and The second bent portion is bent in a second direction opposite to the first direction.

The utility model discloses a numerical control machine tool axial positioning device which is characterized in that the upper surface of a supporting plate is fixedly connected with a stand column and a second fixing block, the upper surface of the second fixing block is fixedly connected with a lower fixing plate, the upper surface of the stand column is fixedly connected with a top plate, a first fixing block is arranged below the top plate, and the surface of one side of the first fixing block is fixedly connected with a first sliding block. A first sliding groove is formed in the stand column, an upper fixing plate is fixedly connected to the lower surface of the first fixing block, the upper fixing plate and the lower fixing plate are both in a V shape, V-shaped grooves are formed in the first fixing block and the second fixing blocks, the upper fixing plate and the lower fixing plate are located in the V-shaped grooves, openings of the upper fixing plate and the lower fixing plate are opposite, the two second fixing blocks are arranged, and the first fixing block is located between the two second fixing blocks. By means of the structure, more stable clamping can be conveniently provided, the positioning precision of the workpiece in the machining process is guaranteed, deviation caused by improper clamping is reduced, meanwhile, it can be guaranteed that the workpiece is evenly stressed in the machining process, and the risk of material deformation is reduced.

The application relates to a magnetic clamping type wafer double-side cleaning rotary mechanism which is used for double-side cleaning of a wafer and comprises an upper cavity, a lower cavity, a chuck, a chuck shaft, a gas-liquid separator and a liquid discharge pump. The top of the chuck shaft is provided with a back spray cover plate, and the center of the back spray cover plate is provided with a spray hole. A magnetic clamping mechanism is arranged on the chuck, and a plurality of waste discharge pipes are arranged at the lower part of the lower cavity. The magnetic clamping type wafer double-side cleaning rotary mechanism clamps the wafer through the magnetic clamping mechanism. The wafer outer circle clamping mode does not cause damage to the wafer (compared with damage to the lower surface of the wafer caused by a vacuum suction cup structure). The clamping effect is good. The clamped wafer can be double-side cleaned at the same time. The cleaning liquids used on the upper and lower surfaces of the wafer can be different and do not affect each other, so that the cleaning range of the wafer is significantly expanded, and the adaptability is high.

This utility model discloses a drilling device for processing drive shafts, including a processing table, columns at the four corners of the processing table, a mounting plate on the top of the columns, and a drilling mechanism on the mounting plate; a pair of parallel slide rails are arranged on the processing table, and each slide rail has at least two sliders, with a sliding plate on the sliders at the same end; a support plate is set in the middle of the sliding plate, and a flexible clamping plate is set on the support plate. The flexible clamping plate has a U-shaped structure, and clamping cylinders are set on the left and right sides of the sliding plate. Clamping plates are set at the piston rod ends of the clamping cylinders and are located on the left and right sides of the flexible clamping plate. Fastening bolts are set on the sliding plate. This utility model uses at least two flexible clamping plates to position and fix the drive shaft. The flexible clamping plates fit the drive shaft under the action of the clamping cylinders, improving the clamping effect and preventing circumferential displacement of the drive shaft, which would affect the drilling position; by setting the sliding plate, the position of the drive shaft can be adjusted to meet the needs of different drilling positions.

The utility model discloses a main electric cabinet air conditioner fan which comprises a fixing plate, a mounting frame is mounted on the fixing plate, a fan body is mounted in the mounting frame, a mounting plate is mounted on the outer side of the fixing plate by arranging a clamping mechanism, a filter plate is fixedly arranged in the mounting plate, and the filter plate is arranged on the outer side of the fixing plate. The clamping mechanism comprises an inserting rod, a fixing sleeve, a clamping groove, an abutting plate, a connecting plate, a sliding groove, a sliding sleeve and a limiting mechanism, the inserting rod is fixed to the outer wall of the fixing plate and connected with the mounting plate in an inserted mode, the fixing sleeve is connected to the top end of the inserting rod in an inserted mode, the clamping groove is formed in the outer wall of the inserting rod, and firm connection between the mounting plate and the fixing plate is achieved through accurate design of the clamping mechanism; and through cooperation of the insertion rods and the fixing sleeves, the mounting plates can be rapidly separated from the fixing plates when needing to be detached, the convenience of replacement of the filter plates is greatly improved, and specifically, the stable clamping effect is achieved through the insertion structures between the insertion rods and the fixing sleeves of the clamping mechanisms.

This utility model relates to the field of reducer assembly technology, and more particularly to a rear wheel-side reducer assembly for off-road vehicles. Its technical solution includes: a reducer body, on which an upper housing is provided, the upper housing being fixed to the reducer body by mounting bolts and mounting nuts; fastening mechanisms are provided at both ends of the reducer body, the fastening mechanisms being used to connect and fix the reducer body and the upper housing; the fastening mechanism includes a mounting component, a locking component, a pressing component, and a resetting component, the mounting component connecting the reducer body and the upper housing, the locking component securing the mounting bolts and mounting nuts, the pressing component pressing the locking component, and the resetting component resetting the locking component and limiting the pressing component. This utility model meets the requirements of reducer assembly use, providing secondary fixing and limiting at the connection between the reducer body and the upper housing through the fastening mechanisms during use, preventing loosening and potential safety hazards.

This utility model discloses a strength testing device for construction projects, relating to the field of engineering testing technology. The device includes a protective frame, a crushing box, and two support plates. Four support legs are fixedly installed at the bottom of support plate one, and support plate two is fixedly installed on the upper part of the four support legs. An electric cylinder is fixedly installed on support plate one, and a pressure plate is fixedly connected to the output end of the electric cylinder. The protective frame is fixedly installed on support plate two, and clamping components are provided on both the left and right sides of the protective frame. A crushing box is fixedly connected to the bottom of support plate two, and a fan and a discharge port are respectively provided on the left and right sides of the crushing box. The crushing box contains a crushing roller one, a crushing roller two, a guide plate one, and a guide plate two. When using this utility model, the concrete to be tested is placed inside the protective frame and fixed by the two clamping components. After crushing, it enters the crushing box below through the discharge hole. It has advantages such as good fixing effect and convenient waste removal.

Automatic lifting equipment of a crane effectively solves the problem of poor clamping effect and comprises a main beam, a crane carriage, a winch, a steel wire rope and a lifting appliance, the lifting appliance comprises a body, a pulley block is installed at the upper end of the body, a first clamping plate and a second clamping plate are hinged to the body, and a first clamping jaw is fixed to the lower end of the first clamping plate; a first clamping jaw is fixed to the lower end of the first clamping plate, a second clamping jaw is fixed to the lower end of the second clamping plate, a first boss is fixed to the inner side of the first clamping plate, a second boss is fixed to the inner side of the second clamping plate, and the first boss and the second boss are located at the same height. Transverse plates are fixed to the upper end of the first clamping plate and the upper end of the second clamping plate, through grooves are formed in the transverse plates, guide rods are fixed to the body and located in the through grooves, the guide rods are sleeved with sliding rings, the sliding rings slide up and down along the guide rods, springs are installed between the body and the sliding rings, and the sliding rings make contact with the transverse plates all the time.

The utility model relates to the technical field of curtain wall construction, and disclose a curtain wall stone board piece's suspension connection structure, including the curtain wall embedded part of fixed on the wall body, the curtain wall embedded part is fixed on the adapter, the adapter is fixed curtain wall steel frame, the outside of wall body sets up stone board, and the inside of wall body is set up to the reinforced steel of stone board orientation, and the stone board is connected through a plurality of groups of suspension assembly between curtain wall steel frame, the suspension assembly includes the suspension and the hooking piece, the suspension is fixed on curtain wall steel frame, the suspension is seted up and opens the hooking groove of opening upwards on, the hooking piece is fixed on the stone board, and the hooking piece includes the hanging board, the hanging board can be adapted and connected in the hooking groove, the stone board is fixed on the locating plate, and the locating plate is located below the hooking piece, and the adjusting piece connection is seted up between the locating plate and the suspension, when the suspension and the hooking piece are adapted and connected, utilize the adjusting piece to be able to fasten together with the locating plate and the suspension, thereby guaranteeing stone dry hanging firm.

The utility model provides a kind of power collection line iron tower modularization grounding device, belong to electric power equipment technical field, the power collection line iron tower modularization grounding device includes: grounding body, connecting component, fixed module, conducting ring and adjusting mechanism;The grounding body is cylindrical structure, the top of grounding body is equipped with connecting face, connecting face is equipped with threaded hole, bolt is threadedly connected in threaded hole;The connecting component includes connecting plate, connecting rod and locking sleeve, connecting plate is fixedly arranged on the connecting face of grounding body, the middle part of connecting plate is equipped with through-hole, connecting rod is arranged in through-hole, the upper end of connecting rod is threadedly connected with locking sleeve;The fixed module includes fixed seat and clamping piece, the utility model can solve the technical problems that the existing power collection line iron tower grounding device structure is complex, installation and maintenance are difficult, modularization degree is low, and adaptability is poor.

The utility model relates to reinforcing steel bar tensile test technical field discloses a reinforcing steel bar tensile test clamping device, including lower casing, upper casing, the left and right two side outer walls of lower casing, upper casing all are fixedly arranged with connecting plate, and the connecting plate on lower casing, upper casing passes through bolt dismounting setting, the both ends of reinforcing steel bar are fixed in the mode of inserting from the through hole on the sliding seat after bending, and the inclined guide body can guide reinforcing steel bar, so that the clamp between reinforcing steel bar curved end and reinforcing steel bar straight section is less than ninety degrees, can effectively avoid reinforcing steel bar from the through hole and separate, and cooperate four groups of pressure plate to press the reinforcing steel bar, ensure the clamping effect to reinforcing steel bar, when clamping the reinforcing steel bar with the convex rib, can only adopt the pressure plate and carry out clamping, the inclined clamping convex on the pressure plate can be clamped into the convex rib of reinforcing steel bar at this moment, further improve the clamping effect to reinforcing steel bar.