245 results about "Circlip" patented technology

The invention provides an elastic check ring and a mounting method thereof. The elastic check ring comprises a matching shaft, a matching assembly and a mounting assembly. The elastic retainer ring (1) comprises a retainer ring body (11) with a lateral opening, a first end part (101) of the retainer ring body (11) is provided with a first lug (12), and a second end part (102) of the retainer ring body (11) is provided with a second lug (13); the matching shaft (2) is provided with a locking groove (21) and an annular mounting groove (24); the check ring body (11) is installed in the annular installation groove (24), the two protruding lugs are installed in the locking groove (21), the two protruding lugs move along with radial stretching of the check ring body (11), and when the check ring body (11) stretches in the radial direction, the two protruding lugs and the two groove walls of the locking groove (21) are matched and locked in a one-to-one correspondence mode. Therefore, the elastic check ring (1) is convenient to mount, the mounting and self-locking success rate can be improved, and the cost is reduced.

The utility model discloses a screw pump with an adjustable shaft seal position structure, which relates to the technical field of screw pumps and comprises a driving screw, a shaft elastic retainer ring is arranged on the outer side of the top of the driving screw and clings to the end of an adjusting shaft sleeve, a sealing gland is fixedly connected to the outer side of the driving screw, and the sealing gland is fixedly connected to the outer side of the driving screw. A bearing seat is arranged at the end, close to the front end cover, of the sealing gland, a screw is in threaded connection with the end, away from the front end cover, of the sealing gland, the bearing seat is in threaded connection with the sealing gland through the screw, and a bearing is arranged at the bottom of the end, close to the front end cover, of the driving screw. Wherein an O-shaped sealing ring groove is formed in the outer surface of the bottom of the driving screw rod, an elastic check ring groove for a hole is formed in the outer surface of the top of the driving screw rod, an adjusting shaft sleeve is arranged on the outer side of the driving screw rod, and the technical problems that the sealing replacement process is tedious, only one sealing material can be selected, and many limitations exist are solved.

The invention discloses an automobile brake disc which comprises a disc body and a gooseneck protruding outwards from one side of the disc body, an annular groove is formed in the connecting position of the gooseneck and the disc body, the automobile brake disc further comprises an annular fin radiator arranged in the groove and a clamping spring arranged on one side of the annular fin radiator, and the annular fin radiator comprises a supporting seat and a plurality of layers of radiating fins which are arranged on the supporting seat and are concentrically distributed at intervals by taking the rotating axis of the disc body as the center. According to the automobile brake disc, the annular fin radiator is fixed in the groove formed in the connecting position of the gooseneck and the disc body through the clamping spring, heat generated by braking is guided out through the radiator by the disc body, and the situation that excessive heat is transmitted to a hub unit through the gooseneck, and the strength of a hub and the service life of peripheral plastic parts are affected is avoided.

The utility model relates to a linker base, clamp spring and plastic shell assembling lifting force detection device. The linker base, clamp spring and plastic shell assembling lifting force detection device comprises a rotating mechanism, and a base feeding mechanism, a clamp spring feeding mechanism, a plastic shell feeding mechanism, a screwing mechanism, a press fitting mechanism and a discharging detection mechanism which are sequentially distributed along the circumferential direction of the rotating mechanism. According to the linker base, snap spring and plastic shell assembly lifting force detection equipment, through mutual cooperation of the rotating mechanism, the base feeding mechanism, the snap spring feeding mechanism, the plastic shell feeding mechanism, the screwing mechanism, the press fitting mechanism and the discharging detection mechanism, automatic assembly of a base, a snap spring and a plastic shell can be achieved, and the machining efficiency is greatly improved; and moreover, after the assembling is finished, the hoisting force detection can be carried out, and the product quality is ensured.

The utility model discloses a clamp spring assembling device which comprises a product feeding mechanism, a clamp spring feeding mechanism arranged on one side of the product feeding mechanism, a clamping and transverse moving module arranged above the clamp spring feeding mechanism and a clamp spring clamping mechanism arranged on the clamping and transverse moving module in a sliding mode. The product feeding mechanism is used for placing products and waiting for the clamp spring clamping mechanism to clamp the clamp spring for assembly; the clamp spring feeding mechanism is connected with the feeding vibration disc and used for receiving clamp springs and waiting for the clamp spring clamping mechanism to clamp the clamp springs. The clamping transverse moving module drives the clamp spring clamping mechanism to reciprocate between the product feeding mechanism and the clamp spring feeding mechanism. The clamp spring clamping mechanism is used for clamping a clamp spring and moving the clamp spring to the product feeding mechanism to assemble the clamp spring, all the modules are linked through a machine and a sensor, accurate butt joint of a product and the clamp spring in space is guaranteed, and errors possibly caused by manual operation are avoided.

The utility model discloses a novel radio frequency connector with long plugging service life and high reliability, comprising a pin connector and a jack connector which are in plugging cooperation, the pin connector is provided with a first center conductor and a first outer conductor sleeved outside the first center conductor; the jack connector comprises a second outer conductor, a second central conductor and a crown spring, a ring spring is sleeved and connected in one end of the second outer conductor, the second central conductor is sleeved in the second outer conductor, and an insulator is sleeved between the second central conductor and the second outer conductor. According to the utility model, the ring spring and the crown spring are adopted for contact, the plugging force can be accurately controlled, continuous and reliable connection can be ensured in the states of impact, vibration and high-speed rotation, and meanwhile, the ring spring has multiple contact points, lower contact resistance, constant plugging force, long service life and lower space requirement, and is convenient and efficient to assemble.

The utility model relates to a torque fixing sleeve structure for a built-in motor of an electric power-assisted bicycle. The torque fixing sleeve structure comprises a center shaft, a torque sensor, a shell, a circlip for a shaft, a torque fixing sleeve and a fixing screw, the torque sensor is sleeved on the middle shaft, and the axial movement of the torque sensor is limited by the elastic retainer ring for the shaft; the torque sensor is sleeved with the torque fixing sleeve, four right positioning grooves and two left positioning grooves are formed in the two ends of the torque fixing sleeve respectively, and the right positioning grooves and the left positioning grooves are clamped with the inner wall of the shell. The torque fixing sleeve is fixed to the shell through a fixing screw, a wiring port and a wiring channel groove are formed in the torque fixing sleeve, and a sensor wiring harness penetrates through the wiring port and is contained in the wiring channel groove. The problems of high cost, complex structure and difficult maintenance are solved.

The present invention discloses a turbocharger structure for fixing a Z-bearing, characterized by comprising: an intermediate body, a Z-bearing disposed at an inner hole of the intermediate body, a first circular retaining ring groove and a second circular retaining ring groove disposed on the Z-bearing and the intermediate body, respectively; an elastic retaining ring contacting the first and second circular retaining ring grooves to achieve axial positioning between the Z-bearing and the intermediate body; first and second positioning piece mounting portions of the same diameter disposed on the Z-bearing and the intermediate body, respectively; a circular retaining piece mounted between the first and second positioning piece mounting portions, the height of the circular retaining piece being slightly lower than the lower edges of the first and second circular retaining ring grooves, and the circular retaining piece achieving radial positioning between the Z-bearing and the intermediate body. The present invention can achieve bidirectional flexible support and automatic positioning of the Z-bearing, reserve space for installing an oil baffle, and further enhance the anti-leakage capability of the compressor.

The utility model belongs to the technical field of motor application, and particularly discloses a brake device for an integrated magnetism-assisting synchronous reluctance roller motor, which comprises a backstop outer circle body, limiting convex blocks, arc-shaped limiting convex teeth, a backstop inner circle body with a through groove, an outer check ring gasket, an inner check ring gasket, an outer elastic check ring, an inner elastic check ring and the like. The brake device for the integrated magnetism-assisting synchronous reluctance roller motor has the advantages that a one-way brake structure is integrally formed after assembly and used for being matched with a rotating shaft clamping groove in a rotating shaft rotating in the forward direction, the rotating shaft rotating in the reverse direction is automatically and reliably locked, reverse rotation or reverse rotation of equipment is prevented, and the service life of the equipment is prolonged; the occurrence of safety problems is completely eradicated; 2, the whole body adopts a split type design and is convenient to assemble, disassemble and maintain, and meanwhile, a one-way anti-reverse structure is adopted, so that reverse stopping movement is timely and stable;

The utility model relates to the technical field of workpiece polishing, in particular to a compressor crankshaft polishing machine which comprises a first motor, and the bottom end of the first motor is fixedly installed on one side of the top end of a bottom plate. A large and small wheel transmission structure composed of an abrasive belt wheel 2, a large belt wheel, a first screw, a flat key and a second sleeve body is driven to rotate through a first motor and a belt on the surface of the power output end of the first motor, and then an abrasive belt wheel 3, a third bolt, the first sleeve body, an elastic check ring for an A-shaped hole, a deep groove ball bearing and a sunk screw are driven through a small belt wheel and an abrasive belt on the surface of the small belt wheel. A triangular abrasive belt wheel transmission structure composed of the abrasive belt wheel 1, the third bolt, the first sleeve body, the deep groove ball bearing and the matched bolt fastener rotates, the polishing angle of the crankshaft journal and the crank neck is formed on the wheel frame, and therefore the type of workpieces can be rapidly and effectively polished, the equipment is easy to operate, manual polishing is replaced, and the polishing efficiency is improved. And compared with a traditional process and manual polishing operation, the working efficiency is improved.

The present application belongs to the technical field of planetary reducer assembly, and particularly relates to a mounting device for planet carrier clamping spring. A vertical first cylinder is mounted on a bottom frame; a piston rod of the first cylinder is connected with a first frame plate; a vertical second cylinder is mounted on the first frame plate; a clamping spring guide block is mounted on a top of a piston rod of the second cylinder; the clamping spring guide block is overall conical, a first mounting hole is formed in the middle of the clamping spring guide block, a first step in the form of a ring is formed by recessing an outer edge of a top of the clamping spring guide block; a clamping spring positioning plate is protruded from a side surface of the clamping spring guide block; a first fixed plate is mounted on a portal frame, two first sliding rails are mounted on the first fixed plate, a first sliding block is mounted on the first sliding rail, a second fixed plate is mounted on the first sliding block, a first angle iron is fixed on a surface of the second fixed plate, a third fixed plate is fixed on a bottom surface of the first angle iron, and a first supporting column is fixed on a bottom surface of the third fixed plate; the first supporting column is used for pressing a planetary reducer.

Provided is a device sealed with a magnetic liquid. The device includes: a rotary shaft, a tank body, a control unit, a first module, a second module, a magnetic liquid, and a pole-tooth. The first module and the second module are in the same configuration, each consists of an outer shell, a left pole-shoe, an electromagnet, a control wiring, a right pole-shoe, and a circlip. The device includes at least two modular structures; the control unit controls a first electromagnet and a second electromagnet to be magnetized to alternately bear a sealing role.

The utility model relates to a pressure balance valve. The steam valve has the advantages of being easy to disassemble and maintain and comprises a valve body, a first cavity and a second cavity are formed in the valve body, a valve rubber base is arranged between the first cavity and the second cavity, a steam valve is fixed to the upper portion of the valve rubber base, two symmetrical air holes are formed in the middle of the steam valve, and the two symmetrical air holes are communicated with the valve rubber base. An air valve is inserted into the center of the steam valve, the upper portion of the air valve is in threaded connection with a limiting seat, an air valve spring is fixed to the lower portion of the limiting seat and arranged on the air valve in a sleeving mode, the lower portion of the air valve spring is supported on the upper portion of the steam valve, a steam valve spring is arranged in the first cavity, and the steam valve spring is arranged in the second cavity. One end of the steam valve spring is fixed to the upper portion of the steam valve, the upper portion of the steam valve spring abuts against the lower portion of the spring upper seat, an elastic check ring is fixed to the upper portion of the spring upper seat, and the elastic check ring is connected to the upper opening of the first cavity in a clamped mode.

This application discloses a thrust pad installation process for a guide thrust sliding bearing, belonging to the technical field of bearing assembly. The key points of the technical solution include a bearing body, wherein the bearing body includes an end cover, a guide pad seat, a thrust pad, a spacer, a mounting block, a circlip, a disc spring, and a locating pin. The specific installation method includes: S1, placing the spacer between the thrust pad and the mounting block, placing the circlip between the spacer and the mounting block, and connecting the mounting block and the thrust pad via fasteners; S2, connecting the guide pad seat and the end cover via fasteners, and installing the locating pin on the guide pad seat; S3, passing the mounting block on the assembled thrust pad through the disc spring and then inserting it into the mounting hole of the guide pad seat; wherein steps S2 and S3 are installed on an installation device. This application can improve the installation accuracy of the thrust pad and reduce labor intensity.

The invention relates to the technical field of gear motors, in particular to an efficient heat dissipation worm gear and worm helical gear gear motor for light-load machinery, which comprises a box body, and the box body is provided with stepped holes for mounting a bearing and an end cover and outer surface reinforcing ribs for external heat dissipation; the motor unit is fixedly connected with the box body; and the composite transmission mechanism at least comprises a parallel shaft gear stage and a staggered shaft transmission pair. Compared with the prior art, the composite transmission of one-stage bevel gear and one-stage worm gear and worm is arranged, and the conical roller bearing, the output shaft deep groove ball bearing and the distance ring / elastic check ring which are arranged at the two ends of the worm shaft in a back-to-back mode are used for axial limiting; and a first metal adjusting pad and a second metal adjusting pad are matched to perform decoupling quantitative adjustment on the meshing backlash and the bearing pre-tightening amount, so that the effects of obtaining a large transmission ratio and smooth output in a compact volume, and giving consideration to both high axial rigidity and low noise are achieved.

The present application relates to a kind of dismounting devices, comprising: positioning member, for positioning first object, first object is provided with first circlip, first object has cavity extending along first direction, and the through hole correspondingly arranged with first circlip is arranged through the outer surface and cavity of first object, positioning member is inserted in cavity, positioning member has first assembly hole extending along first direction and second assembly hole being opened in the hole wall of first assembly hole and being coaxially communicated with through hole;First pusher, it is worn in second assembly hole, with the first end of first circlip and the second end of second end being oppositely arranged in the axial direction of second assembly hole;And second pusher, it is worn in first assembly hole and is abutted to the second end of first pusher, for the positive direction movement along first direction, to push first pusher and first circlip away from first object by passing through through hole, to further expand the width of opening.The present application improves the dismounting efficiency and product appearance quality.

The utility model relates to a computer tray structure based on a frame cabinet door plate, and belongs to the technical field of cabinet accessory equipment. The device comprises a tray assembly additionally arranged on a cabinet door plate of the cabinet, and the tray assembly is installed on the inner surface of the door plate of the cabinet door plate. The tray assembly structurally comprises a tray body, and the bottom face of the tray body is fixedly connected with the bottom face of the movable support. A U-shaped groove of the static support is sleeved with the movable support, a pin shaft is inserted into a static support pin hole of the static support from inside to outside and penetrates through a kidney-shaped sleeve, a clamping groove is exposed out of a coaxial static support pin hole in the other side of the static support, a clamp spring is embedded into the clamping groove of the pin shaft through a tool clamp, and the static support and the movable support are connected. The static support bottom face of the static support is fixed to the inner surface of the door plate. On the premise that the strength and rigidity of the computer tray are ensured, the problems of light weight and high strength of a structure assembly are solved, and reversible switching between the unfolding state and the folding state of the tray is considered.

The vehicle underframe welding and positioning tool comprises a base, centering assemblies are symmetrically arranged on the left side of the upper surface of the base front and back, and height fixing assemblies are symmetrically arranged on the right side of the upper surface front and back; the centering assembly comprises a supporting plate and a centering base, a centering rotating shaft is rotationally installed on the centering base, the outer end of the centering rotating shaft is connected with a handle, the inner end of the centering rotating shaft is provided with a centering disc, three centering protrusions are evenly distributed on the circumference of the centering disc, the centering disc is provided with a centering ring disc on the periphery of the three centering protrusions, and an elastic check ring for a shaft is arranged between the centering rotating shaft and the centering disc. The height fixing assembly comprises a fixing seat and a supporting seat, an inserting column is arranged on the positioning seat and sleeved with a supporting cylinder, a cover plate is arranged above the supporting cylinder, a connecting plate is arranged on the side wall of the supporting cylinder, a height fixing cylinder is arranged at the other end of the connecting plate and located above the supporting seat, supporting rings are arranged at the upper end and the lower end of the height fixing cylinder, and a step positioning shaft is arranged above the height fixing cylinder. According to the utility model, the good welding precision of products is ensured, and the quality of the products is improved.

The utility model relates to a built-in double-clack check valve in the technical field of check valves. A valve clack used for preventing media from flowing back is installed in the middle of the valve body, a lower pin shaft used for limiting the valve clack is installed in the middle of the valve clack, a connecting assembly used for limiting the lower pin shaft is installed in the middle of the lower pin shaft, and upper pin shafts used for limiting the connecting assembly are installed at the two ends of the connecting assembly. According to the improved structure, the completeness of a waterplane is guaranteed while the flow of the valve is guaranteed, the leakage risk caused by damage to the sealing waterplane of the end face of the valve is avoided, when the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft are disassembled, inner clamp spring pliers are clamped into third limiting holes of the two shaft bodies respectively, the two shaft bodies are made to be close to each other, a spring is compressed, and the valve clack is disassembled. And after the two shaft bodies are far away from the bearing, the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft can be taken out of the valve body, and disassembly of the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft is completed outside the valve body.

The utility model relates to a horizontal guide wheel for a stacking machine, and belongs to the technical field of stacking machine equipment. The guide wheel comprises a three-section type eccentric guide wheel shaft, a guide wheel shell and a mounting assembly, the guide wheel shaft is composed of a first eccentric shaft section, a second eccentric shaft section and a third eccentric shaft section, the diameters of the first eccentric shaft section, the second eccentric shaft section and the third eccentric shaft section are sequentially increased at equal intervals. The top of the guide wheel shaft fixes an end cover plate through a sunk screw, and the bottom is limited by an elastic check ring. The first mounting block and the second mounting block surround the outer side of the guide wheel shaft and are connected and fixed through standard parts, a shaft hole or a lock disc structure does not need to be precisely machined, and assembly is simplified; the guide wheel shaft adopts optical axis design, thread machining is omitted, and production cost is reduced. The utility model can obviously improve the reliability of equipment and reduce the maintenance difficulty, and is suitable for various storage stacker equipment.

The utility model belongs to the technical field of mechanical manufacturing and machining, and provides a rocker arm structure which comprises a rocker arm seat, a rocker arm and a rocker arm shaft. One end, far away from the rocker arm seat, of the rocker arm shaft is provided with an external thread and is in threaded connection with a nut; one end of the rocker arm is provided with a mounting hole, the rocker arm rotatably sleeves the rocker arm shaft through the mounting hole, and a bearing is arranged between the rocker arm and the rocker arm shaft. In the rocker arm structure, the rocker arm is rotationally connected with the rocker arm shaft through the bearing, traditional sliding friction is replaced, the rotating resistance of the rocker arm is reduced, and steering is more convenient. The rocker arm seat and the rocker arm shaft are integrally formed through die forging, the size of a forged piece is accurate, the machining allowance is small, and the forged piece has high mechanical strength after thermal refining. And the circlip for the hole is additionally arranged in the mounting hole, and the slotted nut is matched with the cotter pin, so that the bearing can be prevented from falling off, and the stability is improved. The dustproof cover is additionally arranged at the outer end of the mounting hole to prevent dust and muddy water from entering, the sealing performance of parts is better, and the service life of the parts is prolonged.

The present invention discloses a backstop negative pressure flow relief valve with a limit. It includes a valve seat body having a suction hole and a relief hole, and a valve core that can be installed in the valve seat body. The head of the valve core is set as a conical head. After the valve core is screwed into the valve seat body, the conical head can cooperate with and seal the suction hole. A ring groove is also provided in the valve seat body on the same axis as the suction hole. A clamping groove is provided on the valve core, and a circlip is placed in the clamping groove. The circlip can enter from the rear end face of the valve seat body and be limited in the ring groove, and form a certain amount of eccentricity with the ring groove to limit the valve core from withdrawing from the valve seat body. Its advantages are: its structural design is very ingenious, the installation, operation and use are all simple and convenient, without adding extra assembly processes, greatly improving the production and use efficiency, and making its use reliability very good by utilizing the unique characteristics of the circlip.

The utility model discloses a heating chain link which comprises a chain link frame, two main shafts are connected to the chain link frame in a sleeved mode, chain links are connected to the main shafts in a sleeved mode, spacer bushes connected to the main shafts in a sleeved mode are arranged at the top of the chain link frame, and heating belt wheels connected to the tops of the main shafts in a sleeved mode are arranged at the tops of the spacer bushes. The main shaft is sleeved with a heating chain spring, the bottom of the heating chain spring is provided with a first shaft elastic check ring connected to the main shaft in a sleeving mode, and the top of the chain link frame is provided with a second shaft elastic check ring connected to the main shaft in a sleeving mode. The main shaft is sleeved with a sleeve shaft located at the bottom of the chain link frame, the sleeve shaft is sleeved with a blank withdrawing sleeve, the main shaft is sleeved with a deep groove ball bearing guide sleeve, and an elastic check ring is installed on the deep groove ball bearing guide sleeve. The chain link frame is provided with the two bottle blanks, the heating efficiency is high, the structure is stable, the two bottle blanks are driven by the heating belt wheel to rotate uniformly, the heating effect is good, meanwhile, mounting and dismounting are easy, the driving part and the mounting part can be conveniently and independently replaced, and the maintenance and replacement cost is reduced.

The present invention discloses a steel wire shearing device for the production of elastic retaining rings, specifically relating to the technical field of elastic retaining ring production. The device includes a base, a steel wire placing roller, a straightening roller group for straightening the steel wire, a shearing groove body for placing the steel wire, a storage bin for storing the sheared steel wire, and a tool for shearing the steel wire. A central processor, a mounting frame, and an opening and closing mechanism are respectively arranged at the top of the base. A shearing groove plate is arranged at the bottom of the shearing groove body. A pressing mechanism and a correction mechanism are respectively arranged at the top of the mounting frame. The pressing mechanism is used to press both ends of the steel wire entering the shearing position. The opening and closing mechanism is used to control the opening and closing of the shearing groove plate. The correction mechanism is used to straighten the sheared steel wire. The present invention solves the problem of bending deformation of the steel wire caused by stress release after shearing, realizes the intelligent detection and correction of the steel wire after shearing, and ensures the processing accuracy and assembly quality of the retaining ring.

The utility model relates to a piston rod ball head forming device which comprises a base, a lower rotating shaft, an elastic check ring, a rotating tool rest, a ball head piston rod, an upper rotating shaft, a handle, a turning tool, a fastening screw and a machine tool, and is characterized in that a tool bar of the turning tool is inserted into a square hole of a tool bar of the U-shaped rotating tool rest, and a tool nose is close to the U-shaped side of the U-shaped rotating tool rest; a fastening screw is arranged on the side, close to the turning tool avoiding groove of the base, of the tail of the turning tool to fasten the turning tool on the U-shaped rotating tool rest. During turning, the handle is pulled by hand, the U-shaped rotating tool rest drives the turning tool to rotate along the lower rotating hole and the upper rotating hole of the base in a fixed-axis mode, the ball piston rod is turned, and due to the fact that the rotating shaft of the U-shaped rotating tool rest and the main shaft of the machine tool are two shafts perpendicular to each other, the forming surface turned by the turning tool driven by the U-shaped rotating tool rest is a spherical surface by pulling the handle.

The utility model provides a snap spring self-locking type automotive brake which comprises a brake support and a snap spring. The clamping springs are installed at the two ends of the inner side of the brake support, each clamping spring comprises a clamping spring body and a self-locking arm, the self-locking arms are obliquely arranged on the side, close to the brake support, of the clamping spring body, and the clamping spring bodies and the self-locking arms are integrally formed; a limiting part is formed on the brake support, a limiting clamping groove is formed in the limiting part, the self-locking arm is clamped in the limiting clamping groove, rapid installation between the clamping spring and the brake support can be achieved, and the installation steps are simple and rapid; meanwhile, a self-locking structure can be formed between the self-locking arm of the clamping spring and the limiting clamping groove, so that stable connection is formed between the clamping spring and the brake support, and falling and loosening of the clamping spring can be avoided.

The invention provides a locking anti-loosening device for a cantilever type impeller, and relates to the technical field of centrifugal fans, pumps and other equipment. The device adopts a'static-dynamic 'dual anti-loosening mechanism: in a static state, an anti-rotation pin on the end face of a locking nut is inserted into a blind hole of an impeller to realize rigid mechanical locking; dynamic, through the anti-rotation gasket which is arranged outside the nut in a sleeving mode and is provided with an asymmetric structure, continuous auxiliary torque tending to be tightened is generated through rotating fluid. The double mechanisms have a synergistic effect, and the elastic check ring ensures that the pin does not exit. The structure is highly integrated and compact in space, the anti-loosening performance is far better than that of a traditional method, disassembly, assembly and maintenance are convenient, all parts can be repeatedly used, the cantilever impeller locking device is particularly suitable for cantilever impeller locking of high-speed, heavy-load and strong-vibration centrifugal fans, pumps and other equipment, and the operation safety and reliability of the equipment are greatly improved.

A sun wheel axial positioning device of an engineering machinery walking speed reducer relates to the technical field of engineering machinery wheel edge planetary speed reducers and is used for solving the technical problems that in the prior art, a sun wheel positioning end face is abraded fast, and running noise of a whole walking speed reducer is large. The running stability of the whole walking speed reducer can be effectively improved, and the service life of the walking speed reducer is effectively prolonged. In the axial positioning device for the sun wheel of the walking speed reducer of the engineering machinery, a first deep groove ball bearing is connected with a spline connecting sleeve through an elastic check ring for a shaft, and the assembled first deep groove ball bearing and the spline connecting sleeve are installed in a component of a final-stage planet carrier; the second deep groove ball bearing is arranged in an inner hole of the final-stage sun gear, and the right end of the second deep groove ball bearing is positioned by using the circlip for the hole; the final-stage sun gear is arranged in the speed reducer, and the right end face of the spline connecting sleeve is made to make contact with the inner ring of the second deep groove ball bearing assembled in the inner hole.

The invention discloses a pneumatic clamping pressing type emergency valve for a sliding plug door. The pneumatic clamping pressing type emergency valve comprises an upper support assembly, a lower support, an elastic check ring for a shaft, a pressing valve, a lip-shaped sealing ring, a button, a button compression spring and a screw. The upper support assembly and the lower support are connected in a clamping mode, and the lower support can work independently after the upper support assembly is detached. The lip-shaped sealing ring is used for guiding and preventing water for the button; the button is reset through the button pressure spring; the elastic check ring for the shaft is clamped in the groove of the button to prevent the button from falling off, and the matched stroke of the button and the pressing valve is guaranteed. Compared with a knob type emergency valve, self-resetting can be achieved, resetting through a knob is not needed, the operating force is low, and the unlocking efficiency of the emergency valve is greatly improved; meanwhile, on the basis of an integrated pressing type structure, a detachable clamping function is added.

The utility model relates to a sealing structure technical field of crushing equipment, concretely relates to an oil gas sealing structure for airflow mill grading and mechanical crushing grading, aims at solving the problem that the sealing structure is affected by particle and leads to poor sealing effect. Including spindle and bearing seat, and the bearing piece, oil baffle, elastic baffle, bearing cover and sealing ring that are coaxially assembled with the spindle, still include labyrinth ring, the air passage is opened in the labyrinth ring, and the air inlet pipe is connected on the bearing seat, and the air inlet pipe is communicated with the air passage. The labyrinth ring is assembled in the bearing seat end portion and prevents the particle from entering the sealing structure, and the air passage is opened in the labyrinth ring, and the gas is injected into the air passage, prevents the dust particle from entering the sealing gap, thereby reduces the erosion and pollution of the particle to the bearing piece and sealing structure.