103results about How to "Guaranteed assembly accuracy" patented technology

This utility model discloses a support and positioning structure for a double-column stacker crane, comprising: an upper crossbeam assembly and a lower crossbeam assembly connected by a set of column components; wherein, the upper crossbeam assembly includes an upper beam tube, with a first flange plate symmetrically arranged on one side of the upper beam tube; the lower crossbeam assembly includes a lower beam plate, with a second flange plate symmetrically arranged on one side of the support plate; the column assembly includes a column tube, with a third flange plate and a fourth flange plate respectively arranged at both ends of the column tube, and positioning flat steel is symmetrically installed on both sides of the column tube. This utility model only requires randomly selecting two sets from the completed upper and lower crossbeam assemblies for the assembly and positioning process to verify and determine the positioning accuracy of the column components, ensuring the assembly precision of the support and positioning structure, effectively reducing the manufacturing period; it allows for random selection for assembly, eliminating the need to match the upper and lower crossbeam assemblies according to the stamped markings, effectively reducing the assembly error rate.

This utility model relates to the field of fuel cell technology, specifically to an assembly device for an integrated fuel cell stack housing. It includes a gas port end plate, an upper end plate, and a main housing frame located at both ends of the stack core. The upper end of the gas port end plate is provided with a positioning pin that mates with a positioning hole at the bottom of the main housing frame. A first positioning guide block and a second positioning guide block are symmetrically installed on both sides of the gas port end plate. A third positioning guide block and a fourth positioning guide block are symmetrically installed on both sides of the main housing frame. A first guide rod passes through the first and third positioning guide blocks, which are coaxially arranged, and a second guide rod passes through the second and fourth positioning guide blocks, which are coaxially arranged. The through holes of the first and second positioning guide blocks are respectively interference-fitted with the first and second guide rods, and the through holes of the third and fourth positioning guide blocks are respectively slidingly fitted with the first and second guide rods. This design ensures that the housing installation does not touch the stack core, enabling low-cost assembly of the prototype stack.

The invention relates to an energy storage device and a power utilization system. The energy storage device comprises a shell, an electrode assembly, an end cover assembly and a binding piece, wherein the shell is provided with an accommodating cavity; the electrode assembly is arranged in the accommodating cavity, the electrode assembly comprises a plurality of tabs and an electrode main body which are electrically connected, and the tabs and the electrode main body are arranged along a first direction; the end cover assembly is arranged on one side of the shell and used for sealing the containing cavity. The binding piece is positioned between the end cover assembly and the electrode main body; the binding piece is provided with a penetrating hole, and the penetrating hole penetrates through the two opposite surfaces of the binding piece in the first direction. The penetrating hole extends along a second direction, the plurality of tabs penetrate through the penetrating hole, and the first direction is intersected with the second direction; the penetrating hole is provided with a first side wall and a second side wall which are oppositely arranged in the second direction, and in the second direction, the distance between the first side wall and the second side wall is larger than the size of the ends, close to the electrode body, of the tabs.

The present application belongs to the technical field of compressor assembly, and discloses an automatic riveting and locking integrated assembly machine for compressor valve plate, which solves the problems of poor positioning adaptability of the existing valve plate assembly equipment, easy to cause workpiece edge warping deformation, poor consistency of riveting forming and complex equipment structure. The present application comprises a frame body, a hydraulic rod, a connecting seat, a locking assembly, a slide rail and a positioning mechanism, and the positioning mechanism is composed of a transmission assembly, a pressing-down assembly and an edge fixing assembly. The present application uses a single hydraulic rod as the only power source, and realizes the positioning of the side surface of the workpiece, the edge pressing and the synchronous completion of double self-locking through pure mechanical transmission linkage. The multiple groups of independently adjustable positioning heads can be adapted to the outer wall of the special-shaped valve plate. The present application effectively prevents the edge warping and displacement of the valve plate, promotes the plastic flow of metal and ensures the consistency of the riveting forming quality, and has a simplified structure and low failure rate, which greatly improves the assembly precision, quality consistency and production efficiency of the compressor valve plate.

The utility model discloses a static reed for a vacuum relay, a static reed assembly and the vacuum relay, and belongs to the field of vacuum relays. The static reed for the vacuum relay comprises a movable through hole and a positioning groove arranged on at least one side of the movable through hole, the positioning groove is arranged on a first surface of the static reed, and the first surface is a surface intersected with the extension direction of the axis of the movable through hole; the groove bottom of the positioning groove inclines in the direction away from the first surface in the first direction so that the distance between the groove bottom of the positioning groove and the first surface can be gradually increased in sequence in the first direction, or the groove bottom of the positioning groove inclines in the direction close to the first surface in the first direction so that the distance between the positioning groove and the first surface can be gradually increased. The distance between the groove bottom of the positioning groove and the first surface is gradually decreased in the first direction, and the first direction is the direction in which the positioning groove points to the movable through hole. Therefore, the static feeler lever can be pre-positioned through the positioning groove, displacement caused by shaking of the static feeler lever before the static feeler lever is fixed in the positioning groove is avoided, and the assembly precision is improved.

The utility model relates to the technical field of mechanical coupling assembly, and discloses a rotating platform for mechanical coupling assembly, which comprises an assembly table, and further comprises a base arranged above the assembly table; one fixing mechanism is arranged above the base, and the other two fixing mechanisms are arranged above the assembling table; the adjusting mechanism is arranged on the assembling table and used for adjusting the two fixing mechanisms to rotate; and the universal joint coupler comprises three sections which are respectively arranged on the three fixing mechanisms. The three sections of the universal joint coupler are fixed through the three fixing mechanisms respectively, the coupler can be rapidly clamped through cooperation of the electric push rod and the arc-shaped clamping rod, concentric alignment is achieved, and installation efficiency is greatly improved.

This invention belongs to the field of semiconductor positioning technology, and specifically relates to a flexible hinge and a semiconductor positioning device. The flexible hinge includes a hinge body, a first fixing part, a second fixing part, and a connecting part. The connecting part is disposed between the second fixing part and the hinge body, and the connecting part is capable of deformation along a third direction to compensate for assembly deviations between the fixing device and the moving device in the third direction. When installing the flexible hinge, the first fixing part and the second fixing part are connected to the fixing device and the moving device respectively. Under the action of preload, the connecting part can automatically deform along the third direction to compensate for assembly deviations between the fixing device and the moving device without manual adjustment. Furthermore, the connecting part can limit local deformation caused by the preload to the connecting part, preventing it from being transmitted to the moving device, thereby further ensuring the assembly accuracy between the fixing device and the moving device.

The application discloses a method for reversely arranging double flat keys for a motor shaft and an upper half coupling of a nuclear main pump, relates to the technical field of main pump maintenance, and adopts a special tool to reversely push the upper half coupling, a first flat key is prepared through a suitable calculation method, then the size of a second flat key is prepared through the cooperation of a tool key, the upper half coupling is reversely pushed through the special tool, and a suitable flat key is prepared through the gap between the suitable key and the key groove, so that the method avoids the disassembly process of the motor when the flat key and the upper half coupling need to be replaced in the maintenance process of the nuclear power station and in the special situation of a manufacturing factory, avoids the disassembly of parts such as the motor, a motor support and a thrust bearing, greatly saves the maintenance time, avoids the waste of the operation time of the nuclear power station, saves manpower and material resources, avoids many potential adverse factors such as bumps and bruises generated in the disassembly process, greatly improves the production capacity and economic benefits of an enterprise during in-plant assembly, and increases a technical capacity of nuclear main pump localization.

This invention provides a high backlobe suppression horn antenna, comprising a horn antenna cavity with a choke slot. The horn antenna cavity is installed within a reflector cavity to form a high backlobe suppression horn antenna. This invention uses a simple cabin structure as the reflector cavity, which is more suitable for horn antennas compared to complex cavity structures, and can be assembled with an radome, exhibiting high installation adaptability.

The application discloses an electric reactor large pie iron core assembling device and an assembling method thereof. The device comprises an equipment rack, an adjusting unit, a positioning unit, a detecting unit and a control unit. The adjusting unit is installed at the upper end of the equipment rack and is used for bearing the silicon steel sheet and driving the silicon steel sheet to rotate and tilt. The positioning unit is embedded in the adjusting unit and can tightly position the bakelite cylinder from the inside of the bakelite cylinder to stably fix the bakelite cylinder and visually position the center of the silicon steel sheet through the positioning unit. The detecting unit is installed on the outside of the adjusting unit and is used for monitoring the assembling posture of the silicon steel sheet in real time and calculating the perpendicularity deviation of the plane where the silicon steel sheet is located relative to the axis of the bakelite cylinder to ensure the consistency of the silicon steel sheet assembling. The adjusting unit, the positioning unit and the detecting unit are electrically connected with the control unit to improve the automation and the intelligence of the assembling process, reduce the labor intensity, and improve the assembling precision and the assembling quality.

The utility model discloses an adjusting mechanism for assembling a projection logo, which belongs to the technical field of assembly of automobile parts and comprises a workbench, an industrial personal computer, a display screen, a mechanical arm and an adjusting platform, a target is mounted on the surface of the adjusting platform, a fixing seat is mounted on the surface of the adjusting platform, a projection light machine is placed in the fixing seat, and the projection light machine is connected with the industrial personal computer. A fixing column is fixed in the fixing seat, two guide blocks are movably connected to the outer portion of the fixing column, two fixing springs are connected to the outer portion of the fixing column in a sleeving mode, a clamping plate used for clamping the projection light machine is fixed to the outer wall of one side of each guide block, and an industrial camera is installed on the surface of the fixing seat. And an air blowing plate is installed on the outer wall of one side of the fixing base, and an air pump is installed on the surface of the air blowing plate. According to the adjusting mechanism for assembling the projection logo, the assembling precision and the production efficiency of an automobile tail projection system can be remarkably improved, a projection light machine can be conveniently disassembled and assembled, and the definition of image acquisition can be ensured.

The utility model discloses a press-fitting machining device which comprises a machine frame, at least one press-fitting device, a press-fitting device, a press-fitting device and a press-fitting device. The press-fitting mechanism comprises a portal frame, a first lifting mechanism and a press-fitting head, and the press-fitting head and the machining station are correspondingly arranged up and down; and the material moving mechanism comprises a stroke frame, a translation mechanism, a second lifting mechanism and a lifting plate, the stroke frame is arranged on the rack and located below the portal frame, the lifting plate is provided with at least one feeding position, and the translation mechanism adjusts the position of the lifting plate in the length direction of the stroke frame so that the feeding position and the press fitting head can be arranged in an up-down corresponding mode. According to the press-fitting machining device, the assembly process of the workpiece and the iron ring is simplified, full-automatic press-fitting operation is achieved, manual alignment and carrying are not needed, the working efficiency is improved, errors caused by manual operation are reduced, and therefore the assembly precision is guaranteed.

The invention discloses a fabricated large-span indoor detachable stepped curtain wall system, which relates to the technical field of building curtain walls, and comprises a building steel structure, a stepped unit and a ventilation assembly, each step unit comprises a stand column, an upper cross beam, a middle cross beam, a lower cross beam, a glass panel and a honeycomb aluminum plate; the stand column is of a continuous L-shaped bent structure, the upper cross beam and the middle cross beam are fixedly connected to the bent inner side of the stand column and fixedly connected with a building steel structure, and the lower cross beam is fixedly connected to the bent outer side of the stand column. According to the scheme, the assembling design of the step units is adopted, the step units are assembled in a factory for standardized and large-scale production and processing, the assembling precision of the step units is effectively guaranteed, the step units are installed in an indoor assembling and disassembling mode, and therefore the assembling precision of the step units is effectively guaranteed. The risk of outdoor high-altitude operation is reduced, the construction safety is improved, the maintenance procedure is simplified, and the maintenance efficiency is improved.

The utility model relates to the technical field of relay manufacturing, and discloses a novel yoke moving spring riveting mechanism which comprises a rack, a conveying table, a tool, a clamping module and a riveting module. The conveying table is arranged on the rack and provided with a conveying channel used for being in butt joint with and communicating with an external conveying mechanism, and a riveting station is arranged on the conveying channel. The tool is in sliding connection with the conveying channel of the conveying table, and is used for accommodating the yoke assembly and the movable spring assembly and the contact terminal which are arranged on the yoke assembly, and limiting the yoke assembly; the clamping module is arranged on the rack, is opposite to the riveting station in position and is used for clamping or loosening the yoke assembly on the riveting station; the riveting module is arranged on the rack, located above the riveting station and used for pressing the movable spring assembly and the contact terminal on the riveting station downwards so as to rivet the yoke assembly, the movable spring assembly and the contact terminal into a whole. The automatic riveting machine can solve the problems of how to automatically input workpieces to be riveted and automatically output riveted workpieces.

This utility model discloses a rotor device tooling for power generation, including a base plate, a push cylinder, a movable seat, a placement seat, and a fixed seat. The push cylinder is connected to the base plate, the movable seat is movably connected to the base plate, the piston rod of the push cylinder is connected to the movable seat, the fixed seat is fixedly connected to the base plate, and the placement seat is disposed between the movable seat and the fixed seat. An mounting head is provided on the movable seat, and a fixing head is provided on the fixed seat. The mounting head is fixedly connected to the movable seat, and the top of the fixed head has a placement groove on one side near the fixed seat and a movable groove on the other side. A positioning groove is provided on the top of the fixed head, and a positioning component is also connected to the top of the fixed head. The positioning component is detachably and fixedly connected to the fixed head, and a clamping screw is threaded onto the positioning component, with the bottom of the clamping screw extending into the positioning groove. Through the cooperation of the positioning groove, the clamping screw, and the placement seat, the rotor shaft remains stable during bearing press-fitting, avoiding displacement or skew and ensuring assembly accuracy.

The application provides a pressing positioning device for a motor stator, and relates to the technical field of stator processing, which comprises a base and a circumferential positioning device installed on the base; a shell positioning groove for positioning a motor shell is formed in the base; the circumferential positioning device comprises a horizontally movable positioning block, the positioning block is used for cooperating with a vertical positioning groove on the circumference of a stator core and circumferentially positioning the stator core; a positioning opening for accommodating the positioning block to enter and exit is arranged on the side of the motor shell facing the positioning block; the circumferential positioning device further comprises a driving and locking mechanism for driving the positioning block to horizontally move and be locked. The application can improve the pressing precision and consistency of the motor by circumferentially positioning the stator core during the pressing process of the stator core.

The utility model discloses anti-torsion pipe screw machine equipment. The anti-torsion pipe screw machine equipment comprises a lower machine base; the locking and attaching mechanism is assembled on the lower machine base and used for locking and attaching a screw to an anti-torsion pipe; the positioning mechanism comprises a positioning bottom plate and a positioning clamping piece, the positioning bottom plate is assembled on the lower machine base, the positioning clamping piece is arranged above the positioning bottom plate, and the positioning clamping piece can move up and down relative to the positioning bottom plate so as to fix an anti-torsion pipe on the positioning bottom plate. According to the anti-torsion pipe locking device, the positioning clamping piece is arranged above the positioning bottom plate, and the positioning clamping piece can move up and down relative to the positioning bottom plate, so that the end of the anti-torsion pipe is fixed to the positioning bottom plate, and it is ensured that the end of the anti-torsion pipe can be reliably fixed to the positioning bottom plate in the locking process; therefore, the assembling precision of the locking mechanism is guaranteed, and efficient and high-precision automatic screw assembling is achieved.

The utility model discloses a kind of self-generating wireless switches of labor-saving operation, belong to control switch field.The self-generating wireless switch of the utility model, including bottom shell, it is fixedly installed with self-generating module in it, self-generating module has shell fragment;Pressing block, it is slidably installed in bottom shell along vertical or substantially perpendicular to bottom shell direction, and reset piece is equipped between pressing block and bottom shell, the free end of shell fragment is inserted into the slot of pressing block;Transmission rocker, the same side is equipped with lever arm and pressing arm respectively, the end of lever arm is rotationally cooperated with bottom shell, and the end of pressing arm is abutted on pressing block;Switch key, it is contactly cooperated with the side of transmission rocker away from lever arm and pressing arm.The utility model utilizes the lever principle and switch structure optimization of transmission rocker, effectively reduces the pressing force required by key, so that the operation of self-generating wireless switch is more relaxed and labor-saving, with the advantages of simple structure, easy operation, short pressing stroke etc.

This invention discloses a method for constructing a multi-layered assembly of engine room sections and a ship constructed using the same method. The method includes the following steps: S1, manufacturing engine room sections and pre-assembling them off-site to form pre-assembly engine room sections; S2, painting the pre-assembly engine room sections in a painting workshop; S3, transporting the pre-assembly engine room sections and assembling them locally to form the complete engine room section; S4, mounting the complete engine room section onto the ship's hull via a dry dock. This method can reduce manufacturing costs and difficulty. Off-site pre-assembly and integrated painting improve site utilization efficiency. Through simulation prediction, inverted manufacturing of engine room sections and application of reverse pre-compensation can reduce corrections. By setting up inverted welding of engine room sections, no additional scaffolding is needed, reducing costs. By setting up the flipping of engine room pre-assembly sections, the number of flipping and lifting / disassembling operations is reduced. By aligning the joints in the longitudinal direction, structural continuity and assembly accuracy are ensured.

The utility model discloses a crossbeam clamp with lifting mechanism, including end part component fixed clamp and midsection component fixed clamp, end part component fixed clamp is provided with two groups respectively in the left and right sides of midsection component fixed clamp, two groups of end part component fixed clamp and midsection component fixed clamp are all fixed mounting at the top of bottom plate, the front end of end part component fixed clamp still is provided with supplementary lifting device, supplementary lifting device includes first lifting cylinder, first lifting cylinder vertical fixed mounting is at the front end of first lifting mounting seat, and the output shaft of first lifting cylinder is fixedly installed with first lifting board, and the top of first lifting board is fixedly installed with lifting rod, the utility model discloses the design of preventing sticking, and the smoothness of taking piece: the unique supplementary lifting device can automatically lift the workpiece after welding, effectively avoids the workpiece and clamp sticking because of gravity or thermal deformation, guarantees the smoothness of production process.

This invention relates to the field of welding technology and provides a welding method for a layered skeleton-type sidewall unit, comprising the following steps: First, an upper wall panel and a lower wall panel are laid in a tack welding area, overlapping to form a wall panel structure. Second, the dimensions and positioning of a clamping mold are determined based on the layout of the beams and window frames within the sidewall unit, clamping the beams and window frames onto the upper surface of the wall panel structure to form a beam-window frame structure. Third, tack welding is performed on the overlap of the upper and lower wall panels and the connection between the beam-window frame structure and the wall panel structure to form a plate-beam assembly. Fourth, after removing the clamping mold, the plate-beam assembly is transferred to the forming welding area, and beam-column assemblies are stacked on top of the plate-beam assembly and welded to form the sidewall unit. This method ensures welding accuracy between the beams, window frames, upper wall panels, and lower wall panels. During tack welding, there is no need to adjust the beam position or have personnel monitor the entire welding process, saving labor costs.

The utility model provides a kind of quick-mounting combination device for horseback drawing, including drawer side help, drawer bottom plate and connecting device, connecting device includes front end bracket and sectional general bracket, drawer side help is equipped with positioning installation slot, sectional general bracket is equipped with general sliding convex edge part, front end bracket is equipped with front sliding convex edge part, general convex edge part, front sliding convex edge part are in order into positioning installation slot, and positioning installation slot is equipped with inner convex edge, general convex edge part, front sliding convex edge part are respectively equipped with with the positioning clamping groove of inner convex edge matching clamping, sectional general bracket and front end bracket are respectively provided with mounting hole and positioning hole, the front end bracket is equipped with slide rail installation adjusting part, and slide rail installation adjusting part is installed in the bottom surface of front end bracket. Simple structure, adopt sectional assembly combination, convenient and fast operation, strengthen connection stability simultaneously, improve the assembly position precision of product, improve the use quality of product.

This invention relates to a stress-absorbing device and assembly method based on a flangeless waveguide, comprising an I-beam bracket, waveguide clips, screws, spring washers, flat washers, and rubber pads. The rubber pads, serving as stress-absorbing materials, have a slanted opening on their long end face, allowing them to fit over the outer surface of the waveguide. Waveguide clips press against the rubber pads and have through holes. The I-beam bracket has threaded through holes on its wall surface. Screws, fitted with spring washers and flat washers, pass through the through holes in the waveguide clips and connect to the threaded through holes in the I-beam bracket wall. Tightening the screws secures the waveguide clips, rubber pads, and waveguide. Loosening the screws adjusts the relative position of the rubber pads, releasing assembly stress. This invention eliminates assembly stress generated during the assembly of flangeless waveguide components without affecting the assembly efficiency and reliability of other individual devices in the spacecraft, reducing the risk of failure due to assembly stress in flangeless waveguides.

The utility model relates to a kind of heat transfer copper pipes, comprising: heat conduction copper pipe, heat conduction copper pipe is provided with guide copper block, guide copper block is used to guide medium, heat conduction copper pipe is fixedly connected with the interface seat, the interface seat is along heat conduction copper pipe length direction setting, interface seat is slidably connected with heat conduction block, heat conduction block is provided with fixing piece, the fixing piece one end penetrates heat conduction copper pipe and is connected with heat conduction block, fixing piece can fix heat conduction block and guide copper block on heat conduction copper pipe, whole system is directly conducted through intermetallic, expands heat dissipation area and optimizes fluid path Three mechanical synergies, while maintaining maintainability, improve overall heat exchange efficiency.

The application relates to a fixing structure, a rack comprising a first positioning plate and a second positioning plate, a gearbox comprising a first mounting base and a second mounting base, and an eccentric sleeve used for eliminating deviation between the first mounting base and the first positioning plate when the gearbox is mounted on the rack, a second locking cavity penetrating through the second mounting base, a first locking cavity penetrating through the first mounting base, a second insertion hole penetrating through the second positioning plate, a first insertion hole penetrating through the first positioning plate, a linkage cavity axially arranged in the eccentric sleeve, and an eccentric distance between the linkage cavity and the eccentric sleeve. The application allows the rack and the gearbox to have slight manufacturing errors, the eccentric sleeve can compensate for the errors, high machining precision of parts is not required, the manufacturing difficulty and the production cost of the parts are reduced, and the production efficiency is improved.

The utility model provides a kind of cabin body joint cabin tool, it is related to underwater equipment assembly technical field, horizontal shift mechanism and butt joint mechanism, horizontal shift mechanism is used to place cylinder, butt joint mechanism is located in the side of horizontal shift mechanism, wherein, butt joint mechanism includes turnover mechanism and lifting mechanism, turnover mechanism is set on lifting mechanism, lifting mechanism is used to drive turnover mechanism to lift movement, and turnover mechanism is used to place end cover and overturn end cover.The utility model places cylinder on horizontal shift mechanism, end cover is placed on turnover mechanism, and turnover mechanism is placed on lifting mechanism;When cabin body needs to be assembled, end cover is changed from horizontal placement state to vertical placement state by turnover mechanism, lifting mechanism drives turnover mechanism to move to preset position, lifting mechanism and horizontal shift mechanism are close to each other movement, so that cylinder and end cover are butt joint arrangement, to complete the assembly of cabin body, and this assembly mode ensures the assembly precision of cabin body joint cabin, improves the assembly efficiency of cabin body joint cabin.

This utility model discloses a gear train cover for a V12 engine, relating to the field of engine parts. The V12 engine gear train cover includes a cover and a connecting shell. The cover is mated to the outside of the connecting shell. The cover includes a housing and a sealing gasket. A first mating sleeve and a first connecting sleeve are connected to the outside of the housing, and the first mating sleeve and the first connecting sleeve are staggered. A sealing groove is provided on the rear side of the housing, and a positioning pin is connected to the inner side of the housing. The sealing gasket is located on the rear side of the housing. This V12 engine gear train cover, by setting up a mutually cooperating cover and connecting shell, and adopting a staggered distribution structure of the first mating sleeve and the second mating sleeve, and the first connecting sleeve and the second connecting sleeve, combined with bolt connection, makes the overall structure more stable and less prone to loosening. The positioning pin and insertion hole cooperation structure enables rapid and accurate positioning of the cover and the connecting shell, improving assembly efficiency and ensuring assembly accuracy.

The application discloses a split gear capable of being quickly assembled and disassembled, which comprises a gear assembly installed on the surface of a rotating rod, wherein the gear assembly comprises a hub ring, and four gear ring sleeves are installed on the surface of the hub ring. The application relates to the technical field of split gears. The split gear capable of being quickly assembled and disassembled is characterized in that the hub ring, the gear ring sleeve, the inner rotating shaft sleeve, the rotating rod, the positioning blocking plate and the L-shaped rotating port are cooperatively matched, so that the split gear can be quickly assembled and disassembled without tools, the operation process is greatly simplified, and the maintenance efficiency is improved. When assembling, the gear ring sleeve is attached to the hub ring, the arc-shaped rotating plate is pressed to make the positioning blocking plate enter the T-shaped inner groove, and the inner rotating shaft sleeve is rotated to drive the positioning blocking plate to be transversely clamped and locked through the arc pressing part. When disassembling, the inner rotating shaft sleeve is reversely rotated, the right-angle part pushes the arc-shaped rotating plate to drive the positioning blocking plate to reset, and then the gear ring sleeve can be quickly taken off.