54results about How to "Improve assembly productivity" patented technology

The invention relates to the technical field of badge assembly, and discloses an automatic badge assembly line which comprises a lower cover feeding mechanism, an upper cover feeding assembly mechanism and an upper and lower cover press fitting module. The upper cover feeding and assembling mechanism comprises an upper cover feeding mechanism, an upper cover transferring mechanism and an accessory feeding mechanism; the upper and lower cover press-fitting module comprises a lower cover transferring mechanism, a press-fitting mechanism and a discharging mechanism. The press-fitting mechanism comprises a rotating body, a press-fitting driving assembly and a press-fitting mold, and through the arrangement of the lower cover feeding mechanism, the upper cover feeding and assembling mechanism and the upper and lower cover press-fitting module, automation of the whole process of feeding of upper and lower covers of badges, assembling of the upper covers, press-fitting of the upper and lower covers and detection of products is achieved; the badge assembling production operation can be completed without manual participation, the labor cost is reduced, the badge assembling production efficiency is improved, and the stability of the product quality is better.

The full-automatic tray pipe inserting machine comprises a conveying unit, a pipe inserting unit and a pressing and positioning mechanism, wherein the conveying unit is used for conveying trays to all stations through servo driving; the pipe inserting unit is arranged beside the conveying unit; the pressing and positioning mechanism is used for pressing the trays during pipe inserting; the pipe inserting unit comprises a visual deviation rectifying module used for obtaining the pipe inserting position on the tray and a pipe inserting mechanical arm used for inserting the pipe into the tray, and the output end of the visual deviation rectifying module is electrically connected with the input end of the pipe inserting mechanical arm. According to the full-automatic pipe assembling machine, the pipes can be fully automatically assembled into the tray, a large amount of labor cost is saved, the pipe inserting position of the tray is obtained in real time through the visual deviation rectifying module, the assembling process is accurate, the situation that the tray is poked and damaged is not prone to occurring, the full-automatic pipe assembling machine further has the low useless action running process, the assembling production efficiency is high, and the production cost is low. And the use requirements of the current huge and ever-increasing high-weighing-load tray can be met more easily.

The invention discloses a particle separator sealing clamp, a sealing test device and a sealing test method, and belongs to the technical field of aero-engine tests.The particle separator sealing clamp comprises a positioning plate assembly, a bottom plate assembly, a connecting piece, a pipe joint and a plugging assembly; the positioning plate is used for blocking the first end of a main oil way of the rear section of a cartridge receiver of the particle separator assembly, an air inlet through hole is formed in the positioning plate, the pipe connector is arranged in the air inlet through hole and used for being externally connected with an air source and guiding air into the main oil way of the rear section of the cartridge receiver, and the blocking assembly is used for replacing the pipe connector to be installed in the air inlet through hole and blocking the air inlet through hole. The bottom plate assembly comprises a bottom plate, the bottom plate is used for blocking the second end of the main oil way of the rear section of the cartridge receiver of the particle separator assembly, and the connecting piece is used for connecting and locking the positioning plate and the bottom plate. According to the invention, one set of sealing clamp can meet the requirements of sealing tests in different stages, and the test efficiency and the test accuracy are improved.

The invention provides an automatic assembly production line for toy cars, and belongs to the field of assembly production lines. Comprising a mounting frame and a conveying assembly, the conveying assembly is arranged in the mounting frame, a plurality of connecting blocks are evenly distributed and fixedly connected to the conveying assembly, mounting plates are fixedly connected to the connecting blocks, and locking assemblies are arranged on the side walls of the mounting plates. The conveying assembly, the mounting plate and the locking assembly are arranged, two clamping plates are pushed through a first spring, the clamping plates can fix a main body structural part of the toy car, then a conveying shaft can be driven to rotate through operation of a first motor, and the conveying shaft drives a chain to rotate through a chain wheel; and the mounting plate on the chain drives the toy car main body structural member to move together, so that multi-station automatic assembly operation on the toy car can be realized, and the assembly production efficiency of the toy car is effectively improved.

The utility model relates to the technical field of LEO cooling module assembly, in particular to an LEO cooling module assembly line speed chain which comprises an assembly line body, the assembly line body comprises a speed chain conveyor, a plurality of module assembly tools are installed on the speed chain conveyor, and a first elevator and a second elevator are symmetrically installed on one side of the speed chain conveyor. Through the arrangement of the assembly line body, the first hoister and the second hoister are matched with the speed chain conveyor to convey the LEO cooling module, and meanwhile, a plurality of workers are distributed on the speed chain conveyor, so that the plurality of workers are matched with one another on a specified station to assemble the LEO cooling module; and the multiple LEO cooling modules can be conveyed at the same time through the speed chain conveyor, so that the multiple LEO cooling modules can be assembled at the same time, and the assembly production efficiency is effectively improved.

The utility model discloses an automatic feeding device for magnetic tile production, which comprises a feeding unit, which comprises a belt conveyor and a partition plate fixedly connected to the inner wall of the belt conveyor, a plurality of magnetic tiles are distributed on the belt conveyor, two notches for pushing and discharging are formed in the top of the belt conveyor, a grouping pushing unit is arranged on the belt conveyor, the grouping pushing unit comprises a driving part and a quantitative pushing part, the driving part is used for pushing the quantitative pushing part to push the magnetic tiles out of the notch, the quantitative pushing part can adjust its length according to the number of magnetic tiles, and a blocking unit is arranged on the belt conveyor. The driving part can push the corresponding number of magnetic tiles out of the belt conveyor through the quantitative pushing part, so that the grouped magnetic tiles are moved to the adjacent conveying belt to realize the automatic grouping function in the feeding process, thereby improving the efficiency of magnetic tile assembly production.

The application relates to the technical field of mechanical manufacturing, and discloses a novel piston rod automatic mounting tool, which comprises a workbench, a support fixedly connected to the bottom of the workbench, an adjusting ring seat rotationally connected to the top of the workbench, a limiting rotation groove formed in the top of the workbench, and a limiting ring rotationally connected to the inner cavity of the limiting rotation groove; an adjusting mechanism, which is located at the top of the workbench and is used for adjusting the angle of the limiting ring; and a limiting mechanism, which is located at the top of the workbench and is used for limiting the piston rod structure. The clamping mechanism in the limiting mechanism can clamp and limit the piston rod to be installed, the adjusting mechanism is used for rotating the piston rod to the upper cover and lower cover mounting positions, the piston rod can be replaced after installation, the rotatable mounting mechanism is matched, the continuous installation of the piston rod is realized, the structure is simple, the operation is convenient, the piston rod can be continuously installed and replaced, and the piston rod assembly production efficiency is greatly improved.

The utility model discloses a simple assembly type doorbell receiver which comprises a main shell, a circuit board used for being electrically connected with an external power supply and a sounding device electrically connected with the circuit board are arranged in the main shell, and the main shell is provided with a positioning frame, a shell cover, a clamping mechanism and an inserting mechanism. The plugging mechanism is used for plugging with the circuit board so as to fix the circuit board in the main shell; the clamping mechanism comprises a shell cover clamping mechanism for clamping the shell cover and the positioning frame and a main shell clamping mechanism for clamping the main shell and the positioning frame; according to the utility model, screws are not needed for fixed connection, the structure is simple, tools are not needed for installation, the installation is convenient, the assembly production efficiency is improved, and the cost is reduced.

The utility model relates to a kind of NB8 sound shell after welding audio cable's pneumatic press-in tool, including cylinder, cylinder lower head, rotary lower pressing connecting rod, special cable line pressure head, product profiling positioning base, bottom plate, tool antiskid support leg, special cable line placement base, manual air valve switch, mobile slide rail seat, cable line pressure head support and cylinder support;Gas cylinder is controlled by manual air valve switch to go up and down;Special cable line pressure head and air clearance groove design are used, different size rubber mushroom head is adapted and line harness damage is avoided;Shell is accurately aligned by profiling positioning base and slide rail limiting structure;Tool antiskid support leg is height-adjustable rubber support leg, ensure operation stability.The utility model can realize that cable line is quickly pressed into car audio shell product, improve product production efficiency and quality.

The present invention relates to the technical field of heat-conducting plates, and specifically discloses a heat-conducting plate and a production method thereof, including a heat-conducting substrate, a connecting plate shell, a heat-dissipating plate, an upper heat-conducting shell, a lower heat-conducting shell, a water-cooling plate, a heat-conducting column and a heat-conducting groove, wherein the lower heat-conducting shell is plugged into the inner side of the upper end of the heat-conducting substrate, the heat-conducting column is fixedly connected to the lower end of the lower heat-conducting shell, the heat-conducting groove is arranged on the inner side of the upper end of the heat-conducting substrate, the heat-conducting column and the heat-conducting groove are plug-in connected, and the lower end of the water-cooling plate is plugged into the inner side of the upper end of the lower heat-conducting shell. The heat-conducting plate in this scheme adopts a combination of copper and aluminum. Copper has a high thermal conductivity and can transfer heat quickly. Although aluminum has a slightly lower thermal conductivity, it has a small density and a large heat capacity, which is conducive to the absorption and dissipation of heat. Combining the two can give full play to their respective advantages and achieve efficient heat transfer and dissipation. In addition, the structure between the heat-conducting elements in the heat-conducting plate is more compact, and the thermal conductivity efficiency is also better.

The utility model discloses a conductive elastic sheet and an adapter, the conductive elastic sheet comprises an L pole sheet body, the L pole sheet body comprises a first riveting part, a first positioning part and a first clamping part which are connected in sequence, the first riveting part is connected with an L pole terminal, the first clamping part is S-shaped, and one end, far away from the first positioning part, of the first clamping part is connected with a first bending sheet; the N pole piece body comprises a second riveting part, a second positioning part and a second clamping part which are connected in sequence, the second riveting part is connected with the N pole terminal, the second clamping part is S-shaped, and one end, far away from the second positioning part, of the second clamping part is connected with a second bending piece; the L pole piece body is directly clamped on the PCB through the first clamping gap in the first clamping part to achieve contact type conduction, the N pole piece body is directly clamped on the PCB through the second clamping gap in the second clamping part to achieve contact type conduction, the step of welding and fixing is omitted, the assembly production efficiency of the adapter is improved, and the productivity is improved.

The present invention is applicable to the technical field of crushing roller assembly, and provides a hot pressing assembly device, including a frame, wherein two ends of the frame are respectively provided with a pressing assembly, a fixing assembly and a limiting assembly, two auxiliary clamping assemblies are provided between the pressing assembly and the fixing assembly, a clamp 1 is provided on the pressing assembly, a clamp 2 is provided on the fixing assembly, the clamp 1, the clamp 2 and the auxiliary clamping assembly are on the same axis, an alignment assembly is commonly provided on the pressing assembly and the fixing assembly, and the alignment assembly facilitates the adjustment of the shaft head to be aligned with the pin hole on the intermediate sleeve, and the device solves the problems of coaxiality of the shaft head and difficulty in aligning the corresponding positions of the pin holes when the shaft head is pressed in, an auxiliary clamping assembly and an alignment assembly are added, the coaxiality of the workpiece and the alignment of the pin holes are realized, and at the same time, a crushing roller shaft head assembly structure assembled using the above-mentioned hot pressing assembly device is provided, which solves the problem of high cost of forging alloy, improves assembly efficiency and reduces production cost.

This invention discloses a method and apparatus for calculating temperature compensation using a laser tracker for tooling measurement. This method considers not only the difference in thermal expansion coefficients between the temperature compensation plate and the main frame of the large assembly tooling, but also the anchor points of the temperature compensation plate relative to the main frame and the main frame relative to the foundation, thus obtaining a method for calculating temperature compensation at the calibration points on the temperature compensation plate of the assembly tooling. Simulation results show that the calculation method proposed in this invention can effectively eliminate temperature deformation.

The application discloses a hinge and a fender mounting tool and a mounting method for a car engine cover, and is characterized in that the hinge and the fender mounting tool for the car engine cover comprise a tool frame and a body positioning mechanism arranged on the tool frame, hinge positioning components for positioning hinges are arranged on both sides of the tool frame, fender positioning components for positioning fenders are arranged on both sides of the tool frame, and a body clamping component for clamping and positioning a body is further arranged. The hinge and the fender mounting tool for the car engine cover can realize stable positioning, improve the hinge mounting precision and the assembly production efficiency, and have strong practicability and good application prospect.

The utility model discloses a toy gun and an amusement machine. The toy gun comprises a gun shell, a sleeve in sliding fit with the upper end of the gun shell and a recoil force simulation device arranged in the gun shell. The recoil simulation device comprises an air cylinder base, an air delivery pipe and a movable block, the air cylinder base is fixed to the middle of the upper end of the gun shell, the air cylinder base is of an integrally-formed structure, an open groove is formed in the middle of the air cylinder base, and the air cylinder base forms a gun barrel located at the front end and a connecting barrel located at the rear end based on the open groove; a blind hole is formed in the rear end of the connecting cylinder, a cylinder shaft is arranged at one end of the movable block, and the movable block is inserted and matched in the blind hole of the connecting cylinder based on the cylinder shaft; the air delivery pipe is arranged at the lower end of the connecting cylinder, one end of the air delivery pipe is communicated with the blind hole, and the other end of the air delivery pipe is connected into external air supply equipment. By arranging the integrally-formed cylinder base, the air tightness and reliability of the recoil force simulation device are improved, meanwhile, the structure of the recoil force simulation device is simplified, and the assembling production efficiency of the toy gun is improved.

The present invention belongs to the technical field of factory logistics, and discloses a self-locking mechanism and a logistics vehicle. The self-locking mechanism includes: a universal wheel assembly, which is arranged on a trailer; a locking rod, which is rotatably arranged on the trailer; a driving mechanism and a transmission assembly, one end of the transmission assembly is connected to the driving mechanism, and the other end is connected to the locking rod, and the driving mechanism can drive the locking rod to rotate relative to the trailer through the transmission assembly, so that the end of the locking rod away from the transmission assembly can lock and unlock the universal wheel assembly. The self-locking mechanism can realize the locking and unlocking of the universal wheel assembly by using the locking rod through the mutual cooperation of the driving mechanism and the transmission assembly. Compared with the prior art, it has a simple structure and is easy to use. It does not need to reprocess the universal wheel assembly, which reduces the difficulty of installation, thereby improving the assembly production efficiency.

This invention provides an eyepiece with a 360° rotatable and positionable eyecup, comprising an eyepiece tube, a tube support at one end of the eyepiece tube, and an eyecup that can rotate circumferentially relative to the eyepiece tube, coaxially mounted at the other end of the eyepiece tube via an eyecup adjustment assembly. A focusing assembly is located on the outer side of the eyepiece tube between the tube support and the eyecup. This invention fixes the eyecup to the eyepiece tube by designing an eyecup focusing assembly, allowing the eyecup to move with the eyepiece tube during focusing, thus avoiding the risk of the eyepiece touching the eyeball. Simultaneously, the eyecup can be independently rotated to any angle through adjustment of the eyecup focusing assembly. Furthermore, the entire eyepiece structure achieves the required focusing and eyecup angle adjustment functions, requires fewer parts, is easy to install, and has high assembly and production efficiency.

The present invention provides a stress damage evolution prediction method and system in the forced clamping of aviation composite thin-walled structures, which belongs to the field of mechanical analysis and damage prediction of aviation composite structures, including: S1: establishing an analytical solution model of stress distribution and specific damage morphology of composite thin-walled structures; S2: arranging data acquisition devices to collect stress damage data in the forced clamping process; S3: processing and fusion analysis of test data to extract assembly stress damage data features; S4: establishing and optimizing an assembly positioning stress damage finite element simulation model based on mechanism and measured data; S5: training assembly prediction data to evaluate stress distribution and damage possibility under different clamping conditions; S6: obtaining stress distribution and damage area prediction results based on process monitoring data, and alarming when exceeding the dangerous threshold. The present invention can improve the consistency between numbers and reality, identify potential assembly stress concentration and damage risk areas before assembly, and guide the setting of clamping processes.

The utility model relates to the technical field of metallographic specimens, in particular to a large metallographic specimen cutting machine which comprises a workbench and a cutting assembly, a water retaining cover is arranged at the top of the workbench, and the interior of the water retaining cover is divided into a left chamber and a right chamber; a left box body with a control panel is hermetically arranged at the top of the left chamber; a cutting base used for containing a workpiece clamp is arranged in the right chamber, a right box body is arranged at the rear end of the right chamber, and the top of the right box body is in hinge connection with a protective door driven to be opened and closed through two electric push rods. A sliding seat capable of longitudinally moving is arranged in the left chamber; a body of the cutting assembly can be vertically and movably mounted on the sliding seat; a cutter head of the cutting assembly is located in the right chamber, and a waterproof organ cover is arranged between the body and the right side of the left box body. In this way, a motor on the cutting assembly is prevented from being eroded by the cutting fluid, and meanwhile the safety of overall operation is improved.

The invention discloses assembly production equipment which is used for solving the technical problem that the production efficiency is reduced due to the fact that the assembly procedure of an existing product needs to be completed through multiple pieces of equipment. The carrier is used for loading the main body of the product and the cover body of the product, and locking and fixing the cover body of the product and the main body of the product; the feeding and unlocking device is used for transporting a carrier loaded with a product to the preheating device and the assembling manipulator and unlocking the carrier to release a cover body of the product and a main body of the product; the preheating device is used for grabbing a main body of a product and preheating the main body; the assembling manipulator is used for grabbing a cover body of a product and assembling the cover body on a main body of the product; the transfer manipulator is used for grabbing the assembled product into the hot pressing device and grabbing the hot-pressed product into the discharging device; the hot-pressing device is used for hot-pressing the product; and the discharging device is used for discharging the hot-pressed products.

The utility model discloses a new energy automobile daily standard charging socket. The new energy automobile daily standard charging socket comprises a panel module, a terminal module and a tail cover module. A power plugging end and a plurality of signal plugging ends which are axially arranged on the front end surface of the front mounting seat are accommodated at the rear end of a plugging shaft hole in the middle of a flange seat of the panel module; a power terminal front-end shaft sleeve of the terminal module is connected with a power plugging end, a plurality of signal terminal front-end shaft sleeves are connected with a signal plugging end, and the rear ends of the signal terminals are connected with a PCB. And the first threaded piece sequentially passes through the second through hole of the rear mounting seat of the tail cover module, the first through hole of the front mounting seat of the terminal module and the first threaded hole of the flange seat of the panel module to be detachably assembled with the charging socket. According to the utility model, modularized respective assembly is realized, various requirements of customers are met by quickly replacing parts according to the choices of the customers, the production efficiency is improved, and the effects of later maintenance and after-sale are facilitated.

The utility model discloses a solenoid valve structure convenient to assemble, which comprises a shell, the bottom of the shell is provided with a water outlet pipe and a water inlet, the shell is sequentially provided with a floating seat, a valve head seat and a valve head from bottom to top, the floating seat is connected with an annular membrane piece, and the annular membrane piece is connected with the valve head seat; when the lower surface of the floating seat is attached to the upper surface of the water outlet pipe, the water outlet pipe is not communicated with the water inlet; when the lower surface of the floating seat is separated from the upper surface of the water outlet pipe, the water outlet pipe is communicated with the water inlet; and a locking structure for restraining the valve head from moving upwards is arranged on the peripheral wall of the shell. Therefore, the floating seat and the valve head seat are fixed in the shell under the clamping action of the valve head and the shell. And the assembly connection of parts can be effectively reduced, rapid assembly is realized, the assembly production efficiency is improved, and the production requirements are met.

The invention relates to the technical field of mounting tools, and discloses an exhaust corrugated pipe mounting tool which comprises a rear ring structure and a front ring structure, the rear ring structure comprises a first semi-ring and a first flat plate, the first flat plate is welded and fixed to the left end and the right end of the exterior of the first semi-ring, and the front ring structure comprises a second semi-ring and a second flat plate. The second flat plates are welded and fixed at the left and right ends outside the second semi-ring; the lifting hole is formed in the middle position in the first semi-ring and the second semi-ring; the first fixing through holes are formed in the left and right sides in the first half ring and the second half ring; the second fixing through holes are formed in the first flat plate and the second flat plate; and the short screw rods are installed in the second fixing penetrating holes, long screw rods are installed in the first fixing penetrating holes, and nuts are installed outside the long screw rods and the short screw rods in a threaded fit mode. The device has a compression effect on the corrugated pipe, so that the corrugated pipe is convenient to mount.

The utility model discloses a portable ground fault positioning signal source which comprises a box body and an installation frame body located in the box body, the installation frame body is connected with a charger, a lithium battery, a boosting assembly and a high-voltage control assembly, and a master control interaction assembly is connected to a top cover in the box body. The charger, the lithium battery, the boosting assembly, the master control interaction assembly and the high-voltage control assembly are integrally arranged in the Z direction; the charger is electrically connected with the lithium battery, the lithium battery is electrically connected with the boosting assembly and the master control interaction assembly, and the boosting assembly is electrically connected with the high-voltage control assembly. The beneficial effects of the utility model are that the space utilization rate is high, the size of the whole machine is greatly reduced, and the outdoor carrying of equipment is more convenient.

The invention relates to the technical field of lifting appliance tools, and particularly provides a special lifting appliance for modular toilet plate installation. Comprising a lifting appliance frame, a center reset mechanism is assembled on the lifting appliance frame, a mechanical gripper used for gripping plates is assembled on the lifting appliance frame, and the mechanical gripper is connected with the center reset mechanism. During actual installation, the position of a plate can be conveniently and rapidly corrected manually, on the basis that correction is completed, only one-way movement alignment needs to be carried out in the direction perpendicular to the installation face of the plate, multi-direction and multi-dimensional angle adjustment on the plate is avoided, the flexibility of auxiliary installation of the lifting appliance is improved, and the installation efficiency is improved. The installation difficulty between the modularized toilet boards is reduced, and the assembly production efficiency during large-scale assembly is improved.

The utility model discloses a clamp structure, particularly discloses a clamp structure for bonding magnetic tiles of a motor stator, and belongs to the technical field of design and manufacture of mechanical and electrical product production process equipment. The utility model provides the clamp structure for bonding the magnetic tile of the motor stator, which can obviously reduce the labor intensity and improve the assembly production efficiency. The clamp structure comprises a clamping and supporting fixing frame and a clamping assembly, and the magnetic shoes attached to the inner wall of the stator are pressed on the inner wall of the stator at a time through the clamping and supporting fixing frame under the cooperation of external driving force input by the clamping assembly at the same time.

This utility model discloses a multi-row module assembly and replacement structure, relating to the field of multi-row module assembly. The multi-row module assembly and replacement structure includes a bottom component and further includes: a wide plate fixedly connected to the bottom component; a first tray positioning pin fixedly connected to the wide plate; a second tray positioning pin fixedly connected to the wide plate; a tray component fixedly connected to the bottom component, the tray component including: a tray pad fixedly connected to the tray component, the tray component being fixed to the bottom component. This utility model avoids problems such as module deformation or loose connections due to uneven pressure. The use of positioning pins such as the first positioning pin and limiting blocks such as end limiting blocks and end plate limiting blocks ensures the positional accuracy of the modules during assembly, enabling each module to achieve a high degree of consistency in assembly, thereby improving the assembly quality of the modules and increasing the product yield.

The utility model relates to the field of data sockets, and discloses an indicating lamp structure and a data module connector assembly. The data line connector comprises a butt joint inner core and an inner core shell, the butt joint inner core is installed in the inner core shell, a light-emitting part is arranged on the butt joint inner core, a butt joint hole is formed in the outer wall of one end of the inner core shell, and the butt joint hole is communicated with the interior of the shell so that the data line connector can be connected with the butt joint inner core in an inserted mode. The end, provided with the butt joint hole, of the inner core shell is provided with a light-transmitting part, the light-transmitting part circumferentially extends outside the butt joint hole, and light of the light-emitting part is suitable for being emitted through the light-transmitting part. After the light-emitting piece is powered on and lightened, the light-transmitting part forms a light ring, the butt joint hole is located in the light ring, a user can directly insert the data line connector into the light, the data line connector is not prone to colliding with a hard face, and then the data line connector can be rapidly and accurately inserted into the butt joint hole to be in butt joint with the butt joint inner core. And the assembly production efficiency is effectively improved, and the cost is low.

This utility model provides a bolt positioning fixture for a turbojet engine in a confined space, including an upper positioning plate, a positioning assembly, and a lower positioning plate. The lower positioning plate is connected to the upper positioning plate through the positioning assembly. In use, by fitting the entire bolt positioning fixture onto the main shaft journal, the lower positioning plate is limited by the obstruction at the main shaft journal, and the upper positioning plate moves downward under gravity. This drives the pull rod in the positioning assembly to expand the positioning claw in the positioning assembly to position the inner side of the bolt, thus facilitating the alignment of parts with the bolts and reducing the difficulty of operation, improving assembly production efficiency. After the squirrel cage support of the turbojet engine is installed, pulling up the upper positioning plate drives the pull rod in the positioning assembly, thereby causing the positioning claw in the positioning assembly to retract, allowing the entire bolt positioning fixture to avoid the squirrel cage support and enabling quick disassembly of the entire positioning fixture.