49results about How to "Avoid pulling out" patented technology

The invention relates to a photovoltaic junction box connector. A limiting sleeve is supported between a metal electrode and a lock nut to prevent the metal electrode from being pulled out of a connector main body. The limiting sleeve comprises an annular sleeve and an upright axially stretching out of a side wall of the annular sleeve, wherein a reinforcing block radially stretching is arranged at the front end of the upright; and the reinforcing block is embedded into a notch at the rear end of the metal electrode. The limiting sleeve is mounted between the tail of the metal electrode of the connector and a cable sheath straining ring component, the upright pushes against the notch of the metal electrode, and the head of the annular sleeve pushes against the cable sheath straining ring component, so that a metal electrode terminal and the lock nut form overall support by the limiting sleeve of a cable in the connector. A drawing force of the cable for mounting the connector is above 400N.m, so that the drawing force is basically greater than a snap-in force of a cable core and the metal electrode terminal, and cable looseness and extraction caused by limiting can be permanently avoided.

The invention discloses a circuit wiring board with the long service life for power equipment. The circuit wiring board includes a base plate, an insulation shielding cover, a wiring block and a connection block, wherein one side of an upper end of the base plate is equipped with the insulation shielding cover, the base plate is internally equipped with the wiring block, and one side of the wiringblock is equipped with the connection block. The circuit wiring board is advantaged in that the structure is scientific and reasonable, the circuit wiring board is convenient and safe to use, the insulation shielding cover is set, through connection of a rotation shaft and the base plate, the wiring block can be conveniently shielded and protected, and hurt to a user due to exposure of wires in the wiring block is avoided; the wiring block is set, under the action of a bearing rod and a limit groove in the wiring block, leads can be conveniently fixedly connected, shedding of the connection leads from the bearing rod due to side sliding is avoided, and caused poor contact of the connection portion is avoided; the connection block is set, under the action of a moving screw, a fixed half ring, a shrinking groove, a moving extrusion half ring and a bearing column in the connection block, one ends of the connection leads are conveniently fixed, the leads are prevented from being pulled out of the connection block in the device operation process, and stability of the device is improved.

The inventio discloses a geogrid with a negative poisson ratio effect, and a preparation method thereof, and solves the problems of failure in a reinforced earth project and poorer stability of a rib-earth structure since rib materials are easy to pull out in the prior art. According to the geogrid with the negative poisson ratio effect, and the preparation method thereof provided by the invention, the negative poisson ratio effect can be produced, the interaction of the rib materials and fillers is improved, the interlocking of ribs and earth is increased through node expansion, and a pseudo-friction coefficient of a rib-earth interface is increased; and a passive resistance force of grid ribs is increased, so that the stability of a high and large reinforced earth structure is improved.The technical scheme is that the geogrid with the negative poisson ratio effect comprises the grid ribs and node sleeves, wherein each two adjacent grid ribs are spliced to form a net structure through the node sleeve; small nodes are arranged at two ends of each grid rib; the small nodes of each four grid ribs are spliced to form a big node and are fixed through the node sleeve; and under an external load effect, the small nodes slide in the node sleeves , so that the node sleeves are expanded and deformed in a thickness direction, and the negative poisson ratio effect is produced.

The invention discloses a biopsy sampler for the digestive system department, and the biopsy sampler comprises a puncture mechanism which is used for penetrating into a focus; a shell, wherein one end of the shell is connected with the puncturing mechanism, a sampling groove is formed in the shell, and the sampling groove is located beside the puncturing mechanism; a sampling mechanism which comprises a push rod, a moving seat, a scraping piece and a bearing groove body, wherein the moving seat is installed in the shell, the moving seat can move in the direction away from or close to the puncture mechanism under guiding of the shell, the push rod penetrates through the moving seat, the push rod can only rotate relative to the moving seat, and the bearing groove body is installed at the end, close to the sampling groove, of the push rod, the receiving groove body is used for receiving a sampling object through the sampling groove, and an elastic scraping sheet is mounted at the receiving groove body; and a first elastic mechanism which is installed between the moving seats, wherein the first elastic mechanism is used for keeping the bearing groove body blocked by the shell. The biopsy sampler for the digestive system department solves the problem that in the prior art, non-fluid tissue at a focus is difficult to enter a sampling groove.

The invention discloses a trough body capable of preventing cables from deviating. The trough body comprises a main body, a groove, a bracket group and a telescopic post, wherein clamping part groupsand a bristle area are arranged in the groove; the bracket group comprises two brackets; a limiting groove is arranged in one bracket and the other bracket is hinged with a rotating plate; an accommodating cavity is arranged in the rotating plate; a plurality of second springs are arranged in the accommodating cavity; a slide chute is arranged in the upper surface of the rotating plate; one end ofa telescopic plate movably penetrates through the end surface, far away from a hinged end, of the rotating plate and is connected with the second springs; the telescopic plate is provided with a pokerod; a sleeve is arranged on the lower surface of the rotating plate; a first spring is arranged in the sleeve; one end of the telescopic post is connected with a baffle plate and the other end is provided with an extruding plate assembly; and the extruding plate assembly is provided with friction mechanisms. According to the trough body, an extrusion mechanism can be quickly, flexibly and conveniently assembled and disassembled, the cables can be prevented from moving in the groove through the clamping action, and the cables prevented from being entangled and worn out.

The invention relates to a communication module test method and device, computer equipment and a storage medium. The method comprises the following steps: controlling the output level of a test bottomplate through a serial port, and triggering the level of an SIM card hot plug detection pin of a communication module connected with the test bottom plate to change when the output level changes, sothat the serial port generates SIM card information according to the changed level of the SIM card hot plug detection pin; receiving SIM card information, wherein the SIM card information comprises ahot plug state of the SIM card; and matching the hot plug state of the SIM card with the output level, and obtaining a test result of the communication module according to a matching result. By adopting the method, the hot plug state of the SIM card can be simulated, the SIM card is prevented from being manually inserted and pulled out, the time and energy of a tester are saved, the cost is reduced, the test efficiency is improved, no jitter is generated in the test process, and the stability of a module device is ensured.

The invention discloses a wall socket and cassette assembly with an anti-loosening structure. The wall socket and cassette assembly comprises a socket panel installed at the front end of a cassette. Protruding blocks are integrally formed on the inner walls of the left side and the right side of the cassette. The c protruding blocks extend from front to back; threaded sleeves are embedded in the protruding blocks; bolts movably penetrate through the left side and the right side of the socket panel from front to back; each bolt is in threaded connection with one thread sleeve; the front end ofthe socket panel is sleeved with a decorative frame. The rear end of the socket panel is sleeved with a housing, a plurality of barbs are integrally formed on each outer side wall of the cassette, each barb is of a right triangle structure, one right-angle face of each barb is connected with the outer side wall of the cassette, the other right-angle face of each barb faces forwards, and each barbis located on the rear portion of the cassette. According to the invention, the connection strength of the cassette and the wall body can be improved, so that the phenomenon that the cassette is pulled out of the wall body can be effectively avoided, and troubles and losses brought to a user can be avoided.

The invention relates to a double-effect multistage damage-prevention roller press-grinding device. According to the technical scheme, a plurality of slot holes are formed in a processing roller, roller teeth are embedded in the slot holes, springs and sleeves are arranged at the lower parts of the roller teeth, the roller teeth can retract into the slot holes when being subjected to relatively large external force, so that the damage caused by the too large external force to the roller teeth is prevented, and the roller teeth can be kept full; the processing roller is sequentially divided into a plurality of different areas according to the advancing direction of processing materials, each area is internally provided with a corresponding processing plate, the corresponding slot hole, thecorresponding roller tooth, the corresponding sleeve and the corresponding spring, wherein the sleeves and the springs are matched with the roller teeth, the springs in the sleeves in the different areas have different maximum elasticity, and the springs in spring rods in the different areas have different maximum elasticity; and in addition, the springs with the different maximum elasticity can be replaced according to the different processing materials, so that the adaptability of the roller is further improved.

The invention discloses an optical fiber connector with a lock catch. The optical fiber connector comprises a main body, an outer frame, the lock catch and a tail sleeve. The main body is inserted into an optical fiber adapter. The outer frame slidably matches the main body. The outer frame has a lock position and a release position. At the lock position, the outer frame locks the main body on theoptical fiber adapter. At the release position, the outer frame releases the main body. The tail sleeve is connected with the main body, and the tail sleeve is spaced from the outer frame. The lock catch detachably matches the main body. One end of the lock catch abuts against the outer frame, and the other end passes through or abuts against the tail sleeve. The lock catch is configured to prevent the outer frame from moving from the lock position to the release position. The optical fiber connector can limit the outer frame which locks the optical fiber connector and the optical fiber adapter at the lock position, thereby avoiding the phenomenon that an engineer accidentally pulls out the optical fiber connector from the optical fiber adapter.

The invention relates to the related technical field of tests, and discloses a high-moisture-content soil vibration triaxial test sample preparation method and a sample preparation device. The high-moisture-content soil vibration triaxial test sample preparation device comprises a fixed base, a movable base matched with the fixed base is movably installed on one side of the surface of the fixed base, and locking rods are movably installed on the two sides of the fixed base correspondingly; pins are movably connected to the two sides of the top end of the fixed base correspondingly, the movable base is fixedly connected with the fixed base through the pins, a three-section mold is movably installed on the inner wall of the movable base, a top base is movably installed at the top end of the three-section mold, driving handles are movably installed on the two sides of the top base, and a compactor is movably installed at the top end of the top base. The movable base and the fixed base are convenient to disassemble through the pins, so that the movable base and the fixed base can be disassembled from the characteristic of high-water-content soil, layered sample compaction is finally achieved, and the problems that a soft sample is difficult to prepare and difficult to completely take out are solved.

The invention discloses a high lie-on-the-side position supporting device of a patient. The supporting device comprises a supporting plate, an upper base and a lower base, the upper and lower bases can be detachably fixed to the supporting plate and are characterized in that an upper body cavity is formed in the upper base, a lower body cavity is formed in the lower base, the upper body cavity isprovided with arm cavities, the arm cavities are communicated with the upper body cavity, the complete body of patient lying on the side is cooperatively accommodated by the upper body cavity, the lower body cavity and the arm cavities, arm fastening belts are arranged at the arm cavities, and supporting soft cushions are placed in the upper and lower body cavities. The supporting device has the advantages that high lie-on-the-side position mechanical ventilation treatment is helped to be conducted on severe acute respiratory distress syndrome, the risk of being hurt by the pressing by lying on the side for a long term of the patient is reduced, and the patient is located at a high lie-on-the-side position, so that the draining of sputum in the lung is more thorough to help the treatment and rehabilitation of the severe acute respiratory distress syndrome.

The invention relates to an anti-damage roller pressing and grinding device. Multiple groove holes are formed in a processing roller, wherein roller teeth are embedded in the groove holes, and springsand sleeves are arranged at the lower parts of the roller teeth; and the roller teeth can retract into the groove holes when being subjected to large external force, so that the roller teeth are prevented from being damaged by too large external force, and the roller teeth can be preserved. According to the anti-damage roller pressing and grinding device, when materials which are large in size orexceed the processing capacity of the roller are discharged from the roller, the springs are used for pushing the roller teeth out of the groove holes again, so that the tooth top surfaces of the roller teeth are higher than the outer edges of the groove holes, and the processing work conforming to the processing capacity of the roller is carried out; and in addition, the springs with different maximum elasticities can be replaced according to the different processed materials, so that the adaptability of the roller is further improved.

The invention provides an intelligent charging rotary pay-off and take-up device, and belongs to the field of a charging gun connecting wire collating unit. The pay-off and take-up device comprises a charging pile and a charging gun connecting wire, wherein an automatic take-up device is arranged on the charging pile; the charging gun connecting wire is arranged inside the automatic take-up device; a wire outlet is arranged on the automatic take-up device; the automatic take-up device comprises a winding roller; the winding roller is fixed on the charging pile; a round rail groove is arranged in the sidewall of the winding roller; a rail is arranged on the side face of the rail groove; two round conductors which are adaptive to the rail groove are arranged on the bottom face of the rail groove; a sliding block is arranged; the sliding block is arranged in the rail groove; a handle is arranged on the sliding block; a skewed slot is arranged at the top of the sliding block; and one end of the charging gun connecting wire runs through the skewed slot, penetrates a fixed hole of the winding roller and is connected to the charging pile. The pay-off and take-up device can prevent the insulating leather of the charging gun connecting wire from being damaged and is convenient in dragging.

The invention discloses an anti-theft cable sleeve in the power cable technology field. A sleeve is included. An inner bottom wall of the sleeve is horizontally and slidably connected with a trigger piece. The trigger piece is provided with a clamping hole used for clamping a cable, a top of the trigger piece is provided with a cushion block with a height gradually increased from left to right, aV-shaped rod is hinged to the inner wall of the sleeve, one end of the V-shaped rod is connected with a pressing block used for pressing the cable, and the other end of the V-shaped rod abuts againstthe top of the cushion block. The pressing block is arranged to press the cable, when a lawbreaker pulls out the cable towards an external portion of the sleeve, the cable triggers the cushion block to gradually heighten the V-shaped rod, the pressing block rotates, and the cable is further pressed.

The invention discloses an engineering cost measuring ruler for field measurement, and belongs to the field of engineering cost equipment.The engineering cost measuring ruler for field measurement comprises a shell, a communicated rope outlet is fixedly formed in the outer end wall of the shell, and a wrapping post is rotationally connected to the interior of the shell; a round rope is wound on the outer side of the wrapping post, two vertically symmetrical wheel discs are rotationally connected into the rope outlet, length measurement is conducted by stretching the round rope, the total length of the adjacent bent faces on the construction site can be directly measured by means of the flexibility of the round rope, measurement operation is more convenient and faster, meanwhile, the positioning rod is connected with the round rope, and the measurement accuracy is improved. The circle drawing operation can be carried out by taking the round rope as a reference point and taking the extending length of the round rope as the radius, and an additional compass drawing device does not need to be arranged, so that the applicability of the device in a project cost measuring field is improved to a certain extent.

The invention discloses a regional cable collection system, which comprises a main body, an extrusion mechanism and a telescopic post, wherein a groove is formed in the main body; a bracket group is arranged on the upper surface of the main body and comprises two brackets; the two brackets are located at two sides of the groove separately; the brackets are vertical to the upper surface of the mainbody; the brackets are provided with a limiting plate parallel to the horizontal plane; the limiting plate is located between the two brackets; the extrusion mechanism comprises a bottom plate; a sleeve is arranged on the lower surface of the bottom plate; a spring is arranged in the sleeve; one end of the telescopic post movably penetrates through the bottom of the sleeve and is connected with abaffle plate; the diameter of the baffle plate is greater than that of an opening in the bottom of the sleeve; the baffle plate is connected with the top end in the sleeve through the spring; and anextrusion plate is arranged at the other end of the telescopic post. According to the regional cable collection system, the extrusion mechanism can be quickly and conveniently installed and dismantled; and cables are prevented from moving in the groove through the clamping function and are prevented from being intertwined and worn.

The invention discloses a refrigerator with an improved air return cover mounting structure. The refrigerator comprises a refrigerator body, the refrigerator body comprises a bottom inner container and an air return cover, a cooling chamber and a storage space are defined in the bottom inner container, the cooling chamber is arranged below the storage space, the air return cover is arranged on the front portion of the cooling chamber, at least one front air return opening communicating with the cooling chamber and the storage space is formed in the air return cover, and side edge clamping structures are arranged on the two sides of the air return cover correspondingly, so that the air return cover can be detachably connected with the supporting walls on the two sides of the air return cover through the side edge clamping structures. According to the invention, the side edge clamping structures are arranged on the side walls of the air return cover and can limit the front and back positions of the air return cover and the bottom inner container, the situation that a user can easily pull out the air return cover is further avoided, the stability of the air return cover is improved, and the refrigerator is simple in structure, high in practicability and easy to use and popularize.

The utility model relates to the field of air valve actuators, and discloses a mistaken touch prevention adjusting type air valve actuator which comprises a shell, a fixing seat is fixedly connected to the inner wall of the shell, a fixing pipe is movably connected in the fixing seat in a sleeved mode, a first gear is fixedly connected to the rear portion of the fixing pipe, and one end of the first gear is connected with a second gear in a meshed mode. A guide piece is fixedly assembled in the center of the second gear, a micro-motion unit is fixed in the shell, a static contact piece and a movable contact piece are electrically connected to the micro-motion unit, a cross-shaped hollow sleeve is welded to the rear end of the inner wall of the fixing pipe, an execution column is inserted into the fixing pipe, and a handle is fixedly installed at the rear end of the fixing pipe. According to the mistaken-touch-preventing adjusting type air valve actuator, the handle is arranged, the mistaken touch preventing device is arranged in the shell and at the position where the handle is located, electrical triggering is controlled through mechanical rotation, it is ensured that an electric control signal is sent out after each adjusting action is correctly embedded, and through the mistaken-touch-preventing design, the problem that mistaken operation is caused due to the fact that the handle is prone to being mistakenly touched is solved.

The invention belongs to the technical field of friction materials, and particularly relates to a high-strength wear-resistant friction material and a preparation method thereof.The high-strength wear-resistant friction material comprises 8-12 parts of basalt fibers, 0.5-2 parts of graphene microcapsules, 10-16 parts of graphite, 25-35 parts of composite fibers, 2-3 parts of butyronitrile rubber powder, 5-6 parts of phenolic resin, 16 parts of barium sulfate, 4 parts of iron sulfide, 4 parts of magnesium oxide, 3 parts of aluminum oxide and 5 parts of chromite. According to the multi-component composite material with the basalt fibers and other fibers as reinforcing fibers and the graphene microcapsules as filler, the preparation method solves the problems that the basalt fibers are prone to agglomeration and uneven in dispersion, and large defects of a friction surface of a product due to fiber pulling out are avoided; meanwhile, graphene is wrapped in microcapsules and added into the friction material, and the problems that graphene is not prone to being evenly dispersed, and the bonding strength between graphene and a resin interface is low are solved.

The invention relates to the technical field of power distribution boxes, in particular to a power distribution box based on multiple trigger type circuit protection and a control method thereof.The power distribution box comprises a box body, a master control switch and a circuit breaking unit, and a shifting rod is arranged on the master control switch; the box body is provided with an indicating lamp. The circuit breaking unit comprises a stirring frame, a bidirectional motor, a straight gear, a transmission assembly, a clutch assembly and a crank. The stirring frame is movably arranged in the box body in the vertical direction, and a plurality of meshing teeth are vertically and uniformly arranged on the side wall of the stirring frame; the bidirectional motor is horizontally arranged on one side of the shifting frame; the straight gear is fixedly arranged at the output end of the bidirectional motor and is meshed with the meshing teeth of the shifting frame; the transmission assembly is arranged on the straight gear, and the transmission assembly and the straight gear are in two-way transmission; the clutch assembly is arranged on the transmission assembly; the crank is arranged on the clutch assembly. According to the invention, automatic power-off and manual power-off are combined, the occupied space of the distribution box is reduced, and the operation safety of workers is ensured.

The invention provides a double-cavity calculus removing balloon. The calculus removing balloon comprises a catheter body, a balloon part arranged at the front end of the catheter body and a handle part arranged at the rear end of the catheter body. A first channel and a second channel are formed in the catheter body, the first channel and the second channel are respectively connected to a first handle and a second handle, the first channel is used for inflating the balloon part, the second channel is used for injecting a contrast medium for cholangiography, the front end of the balloon part is provided with a head part, the head part is a single-channel tube, and the tube wall of the tube is provided with a guide wire through hole for a guide wire to pass through. During use, the tail endof the guide wire sequentially penetrates through the front end of the head part and the guide wire through hole, the contrast medium is injected through the second handle for cholangiography, and the balloon is filled with gas injected through the first handle for calculus removal. According to the invention, a guide wire side hole is formed in a catheter in front of the balloon, the balloon anda body part are not provided with guide wire channels but only provided with an injection channel and a balloon channel, and therefore a balloon bile duct can be made thinner, and the requirements ofa manufacturing process and materials are lower.

The invention relates to a double-effect anti-damage rolling drum smashing device. A plurality of treatment plates provided with spring rods are arranged on a rolling drum side wall, springs of the treatment plates can be compressed, and therefore gaps between the rolling drum peripheral treatment side wall and rolling drum teeth can be larger; a plurality of slotted holes are formed in the treatment rolling drum, and the rolling drum teeth are arranged in the slotted holes in a buried mode; and the springs and sleeves are arranged on the lower portions of the rolling drum teeth, the rolling drum teeth can retract to the interiors of the slotted holes under the effect of large external force, further the rolling drum teeth can be prevented from being damaged due to the over large externalforce, and therefore the rolling drum teeth can be kept to be intact. The multiple treatment plates matched with the treatment rolling drum are arranged on the rolling drum peripheral treatment side wall, the treatment plates are fixedly connected to the rolling drum peripheral treatment side wall through the spring rods, and the springs in the spring rods can be compressed. In addition, springs with different maximal elastic force can be replaced according to different treatment materials, and therefore the adaptability of the rolling drum is further improved.

The invention relates to a multi-stage anti-damage roller pressing and grinding device. A plurality of slots are formed in a treatment roller, roller teeth are buried in the slots, springs and sleevesare arranged at the lower parts of the roller teeth, the roller teeth can retract into the slots under the action of larger external force, damage to the roller teeth due to too large external forceis avoided, and the roller teeth are protected. The treatment roller is divided into a plurality of different areas in the advancing direction of processing materials sequentially, each area comprisescorresponding slots, roller teeth as well as the sleeves and springs which are matched with the roller teeth, and the springs in different areas have different maximum elastic force. Besides, the springs with the different maximum elastic force can be replaced according to different treatment materials, so that the adaptability of the roller is also further improved.

The invention discloses a trough body capable of preventing cables from deviating. The trough body comprises a main body, a groove, a bracket group and a telescopic post, wherein clamping part groupsand a bristle area are arranged in the groove; the bracket group comprises two brackets; a limiting groove is arranged in one bracket and the other bracket is hinged with a rotating plate; an accommodating cavity is arranged in the rotating plate; a plurality of second springs are arranged in the accommodating cavity; a slide chute is arranged in the upper surface of the rotating plate; one end ofa telescopic plate movably penetrates through the end surface, far away from a hinged end, of the rotating plate and is connected with the second springs; the telescopic plate is provided with a pokerod; a sleeve is arranged on the lower surface of the rotating plate; a first spring is arranged in the sleeve; one end of the telescopic post is connected with a baffle plate and the other end is provided with an extruding plate assembly; and the extruding plate assembly is provided with friction mechanisms. According to the trough body, an extrusion mechanism can be quickly, flexibly and conveniently assembled and disassembled, the cables can be prevented from moving in the groove through the clamping action, and the cables prevented from being entangled and worn out.

A health management device suitable for hyperglycemia patients provided by the present invention comprises a glucometer body, one side of the glucometer body is provided with a clamping groove, the top of the clamping groove is communicated with a mounting groove, the mounting groove is internally and rotatably connected with a rotating rod through a first mounting seat, the outer surface of the rotating rod is sleeved with a sliding block, and the front surface of the sliding block is rotatably connected with a connecting rod. One end of the rotating rod is rotationally connected with a driving roller and a first transmission wheel through a rotating shaft, and a driving device and a tensioning device are arranged in the mounting groove. According to the health management device, the end is pressed to drive the rotating rod and the driving roller on the rotating rod to rotate anticlockwise, so that the driving roller leaves the clamping groove, one end of the test paper is conveniently inserted into the clamping groove, the end is loosened, the driving roller is pressed on the surface of the test paper, and the test paper is prevented from being accidentally separated from the clamping groove; the test paper can enter the clamping groove and be separated from the clamping groove, manual insertion and extraction of the test paper are avoided, operation is easy and convenient, and cross infection caused by contact between an operator and blood on the test paper can be avoided.

The application relates to the technical field of fiber processing, and discloses a high-wear-resistance modified fiber and a preparation method thereof.The modified fiber prepared by the application is prepared from polyester material taking terephthalic acid as a binary acid, ethylene glycol and 1,2-propylene glycol as binary glycol as a main matrix, and adding modified carbon black and polyethylene wax for mixing, melt extrusion, melt spinning, drawing and impregnation; the modified fiber realizes the synergistic promotion of wear resistance and antistatic performance on the basis of keeping good mechanical properties of polyester fiber, and has a wide application prospect in the field of industrial textiles.

The invention discloses a comprehensive checking tool capable of detecting a true position of an elliptical hole. The comprehensive checking tool comprises a bearing base; the bearing base is provided with a location holding device, an elliptical hole measuring device and a round hole measuring device. The invention has the following beneficial effects: 1, the true positions of multiple holes canbe detected, the speed is greatly improved as being compared with three coordinates, and the comprehensive checking tool can meet the requirements of production field large-scale detection and improve the economic efficiency; 2, the comprehensive checking tool can simulate assembly, prevent the high-precision three coordinates from misjudging a product which has slight size over tolerance and fully qualified assembly; 3, comprehensive checking tool can detect the true position of the elliptical hole, has reasonable structural design, and can ensure high-precision detection; 4, the comprehensive checking tool adopts a keep-space trough, thus improving the measurement precision, reducing abrasion of a screw lead part and a square groove and improving the service life of a gauge rod; and 5, the comprehensive checking tool adopts a stroke threaded pin bolt, thereby having simple detection operation, preventing the gauge rod from dropping off, reducing the handling mark of a measuring headand saving the cost.