103results about How to "Prevent axial slippage" patented technology

The invention discloses a spiral stirrup continuously and synchronously machining machine and a machining method. The machining machine comprises a machine body seat, a spiral stirrup machining device and a monitoring device. The spiral stirrup machining device comprises a rotary workbench, a stirrup winding mechanism, a feeding mechanism and a cutting mechanism. The stirrup winding mechanism comprises a stirrup twining frame, a rolling type bending mechanism and a screw pitch axial feed mechanism. The monitoring device comprises a control device, a counting unit and a rotating speed measuring unit. The machining method comprises the first step of determining the number of winding shafts and the installation position, the second step of adjusting the positions of the winding shafts, the third step of feeding and positioning stirrup material, the fourth step of forming spiral stirrups and the fifth step of cutting spiral stirrups. The machining machine is simple in structure, continuous machining of spiral stirrups is achieved, and the production efficiency is high; meanwhile, the concrete constraining force of beam columns of buildings can be improved through the produced spiral stirrups, and therefore the seismic capacity of the buildings is improved. Practicality is high, and the machining machine and the machining method are low in carbon, environmentally friendly and efficient and save energy.

The invention provides a centering clamping apparatus of an ellipsoidal workpiece, which belongs to the technical field of a clamping device. The centering clamping apparatus comprises a screw, a left slide block, a right slide block, a left centering clamping assembly, a right centering clamping assembly, a height adjusting assembly and a return assembly, wherein both the left slide block and the right slide block can be arranged on a guiding seat in a sliding manner, a left threaded section of the screw is connected with the left slide block in a threading manner, a right threaded section of the screw is connected with the right slide block in a threading manner, a carrier frame of the height adjusting assembly is arranged on a fixed seat in an up-down sliding manner by virtue of a guide rod and a guide column, a left centering clamping assembly and a right centering clamping assembly are symmetrically arranged at the left side and the right side of the height adjusting assembly, the lower end of a left leaf spring of the return assembly is installed on a left supporting frame by virtue of a left nail, and the upper end of a right leaf spring is inserted into a right clamping groove of a right centering pressure rod. The centering clamping apparatus not only rapidly centers and clamps the ellipsoidal workpiece and is reasonable in structure, but also can be suitable for various models of ellipsoidal workpieces, and is high in universality.

The invention discloses a furrow ridge film mulching device for agricultural use. The device comprises a vehicle frame, rolling wheels, a film placing mechanism, film pressing mechanisms, a soil storage box, soil covering mechanisms and soil pressing mechanisms; the rolling wheels are arranged on both sides of a lower frame, the film placing mechanism is arranged on one side of the lower frame, the soil storage box is arranged on one side of the film placing mechanism, the film pressing mechanisms are symmetrically arranged on one side of the soil storage box, the soil covering mechanisms aresymmetrically arranged on one sides of the film pressing mechanisms, and each soil pressing mechanism is arranged on one side of the corresponding soil covering mechanism. The soil storage box is arranged on the lower frame; when film mulching of one furrow ridge is completed, a film is cut by a cutter, and soil in the soil storage box drops down under the action of gravity to press the tail end of the film, so that manual soil pressing is avoided, and the work efficiency of film mulching is improved; meanwhile, the soil pressing mechanisms are arranged at the tail part of the vehicle frame tocompact the soil on both sides of the film, so that the film mulching effect is ensured, and the situation that wind enters from the sides of the film and blows the film upward is avoided.

The invention relates to a driving device for a rear hub of a bicycle. The driving device comprises a hub shell, a unidirectional driving component and a bidirectional driving seat, wherein the unidirectional driving component comprises a ratchet ring and a ratchet wheel seat. A plurality of unidirectionally diagonal bevel gear sides are arranged on the inner peripheral ring of the ratchet ring, a plurality of embedded ribs are arranged on the outer peripheral ring of the ratchet ring and are embedded in fastening ribs of a fixed ring of the hub shell. A plurality of groups of combining portions oppositely arranged are arranged on the outer peripheral ring of one end of the ratchet seat, and an elastic part and a pawl abutted to the bevel gear sides are assembled on the each combining portion. The bidirectional driving seat is provided with a plurality of nested ribs arranged on an end ring, and the nested ribs of the bidirectional driving seat are nested with the fastening ribs of the fixed ring of the hub shell. The driving device in the above structure can meet requirements of riders and can be switched in unidirectional driving or bidirectional driving mode, applicability of the hub is improved, required product types of enterprises are simplified, product stock is reduced and production cost is reduced.

The invention discloses a pipeline repair device which comprises an upper shell body, a lower shell body and sealing gaskets arranged on the upper shell body and the lower shell body correspondingly. Flange and bolt connecting pieces used for joining the upper shell body and the lower shell body into a whole shell in a butt joint mode are arranged on the two sides of the upper shell body and the lower shell body correspondingly. Each sealing gasket comprises radial sealing bodies and axial sealing bodies. The upper shell body and the lower shell body are each provided with radial sealing grooves and axial sealing grooves used for installing the radial sealing bodies and the axial sealing bodies correspondingly. The upper shell body or the lower shell body is provided with protruding protective walls arranged on the outer sides of the axial sealing grooves. When the upper shell body and the lower shell body are in a relatively butt joint state, the protective walls closes gaps between correspondingly flanges from the outsides. By adoption of the pipeline repair device, the situation that accelerated aging of the sealing gaskets are caused by exposure out of the shell can be effectively prevented; and meanwhile, the defect that the portions, located in the axial grooves, of the sealing gaskets are squeezed out of the sealing grooves or burst due to overlarge pressure can be overcome, the anti-pressure ability and the reliability are greatly improved, and the sealability and reliability are higher.

The invention discloses a fin ray-free amphibious propelling device with bionic undulating fins, which is characterized in that two end fixed type crankshaft swing rod transmission modules are arranged on corresponding bottom plates correspondingly, and the front ends and the rear ends of the two bottom plates are connected with a front waterproof steering engine amphibious mode switching module and a rear waterproof steering engine amphibious mode switching module correspondingly; the front and back waterproof steering engine land and water mode switching module is used for maintaining the state of the bottom plate; each end fixed type crankshaft swing rod transmission module is connected with one flexible fin-ray-free flexible fin through the corresponding drive swing rod mechanism, and the joint of each drive swing rod mechanism and the corresponding flexible fin-ray-free flexible fin is provided with a rotational degree of freedom to drive the fin surface of the corresponding flexible fin-ray-free flexible fin to achieve fluctuating motion. The problems that an existing amphibious robot is complex in transmission mechanism, complex in amphibious mode switching, large in wheel paddle driving noise, low in flexibility and large in environment disturbance, the movement speed of fluctuation fins driven by a conventional steering engine is low, and a traditional cam and crankshaft connecting rod mechanism is low in bearing capacity and cannot conduct amphibious movement are solved.

The invention discloses a double-limitation connecting system for a marine fiber reinforced composite pipe. The double-limitation connecting system comprises a thickened pipe portion and a connecting portion; the thickened pipe portion is bonded with the composite pipe and comprises a first thickened layer and a second thickened layer arranged on the outer side of the back half section of the first thickened layer, and the composite pipe, the first thickened layer and the second thickened layer are in transition connection with one another through conical surfaces; the connecting portion comprises a clamping part, an inner spindle and a locking ring, the clamping part is arranged on the outer side of the thickened pipe portion, and a front-end plug of the inner spindle is inserted into the composite pipe and generates initial interference; the conical surface of the second thickened layer is matched with the conical surface of the corresponding portion of the clamping part, the thickened pipe portion is subjected to the axial geometric limitation and the friction force action generated on the contact surface under the action of external force, and then double limitation of clamping locking and mechanical clamping of the connecting portion on a pipeline and the thickened pipe portion is achieved; meanwhile, the two thickened layers effectively share the pipe body stress, and therefore the bearing capacity of the connecting system is significantly improved. The connecting system is high in structural strength and good in bearing performance and can be applied to deep-sea, high-temperature and complex using environments.

The invention provides a copper pre-plating method, a copper plating method and a copper plating device for a superconducting strip. The copper plating device for the superconducting strip comprises a discharging mechanism, a first cleaning mechanism, a copper pre-plating mechanism, a bright copper plating mechanism, a sand surface copper plating mechanism, a second cleaning mechanism, a passivation mechanism, a drying mechanism and a collecting mechanism. The discharging mechanism is used for unwinding the machined strip, the machined strip sequentially passes through the first cleaning mechanism, the copper pre-plating mechanism, the bright copper plating mechanism, the sand surface copper plating mechanism, the second cleaning mechanism, the passivation mechanism and the drying mechanism during machined and is wound on the collecting mechanism, the copper pre-plating mechanism adopts first current electroplating treatment, the bright copper plating mechanism adopts third current electroplating treatment, and the sand surface copper plating mechanism adopts second current electroplating treatment. By adopting the design of copper pre-plating, copper plating and the like, the problem that a superconducting layer is corroded by liquid is solved, and meanwhile, the electroplated superconducting strip is good in quality and high in electroplating efficiency.

The invention relates to a static deformation experiment device for testing a low-strength test piece. The technical scheme is that the static deformation experiment device comprises a testing device and a pressure transmitting device, wherein the testing device, the test piece (4) and the pressure transmitting device constitute a test piece testing body. Eight axial grooves (14) are uniformly formed along a generatrix of a large cylinder of a base (1), lower ends of radial strain measuring rods (5) and axial strain measuring rods (7) are fixed in the corresponding axial grooves (14) through screws (2) respectively, and the radial strain measuring rods (5) and the axial strain measuring rods (7) are in alternative distribution; big-head screws (6) are connected with upper ends of the radial strain measuring rods (5) through threads, electric resistance strain gauges (3) are attached to the radial strain measuring rods (5) and the axial strain measuring rods (7) respectively, and each electric resistance strain gauge (3) is externally connected with a strain indicator or a computer through a corresponding signal line (11); a gland (8) and a pressure head (9) are in threaded connection, and a rubber pad (10) adheres to the upper plane of the pressure head (9). The static deformation experiment device has the characteristics of convenience in mounting and debugging and small measurement errors.

The invention relates to the technical field of winding machines, in particular to a winding machine capable of adjusting a chemical fiber yarn winding paper tube. The winding machine comprises two rotary tables, supports, a drive device, a plurality of supporting rods, bearing pedestals, an output shaft and a first connection shaft. Fixing holes are formed in the centers of the rotary tables, each rotary table is provided with a plurality of connection hole sets with the corresponding fixing hole as a circle center, each connection hole set comprises a plurality of connection holes, and the connection holes of each connection hole set are located in the same circumference. The supports are symmetrically connected with the two bearing pedestals correspondingly. The drive device is rotationally connected with one bearing pedestal through the output shaft, and one end of the output shaft is fixedly connected with one rotary table. The first connection shaft is rotationally connected to the other bearing pedestal, and one end of the first connection shaft is fixedly connected with the other rotary table. By arranging the rotary tables and the supporting rods, the positions of the supporting rods on the rotary tables are adjusted according to the diameter of an inner hole of the paper tube so that the paper tube can be supported and fixed, the paper tube can be fixed without a fixing shaft, and therefore the production cost is greatly reduced.

The invention provides a roll-to-roll superconducting strip copper plating device and method. The roll-to-roll superconducting strip copper plating device comprises a discharging mechanism, a first cleaning mechanism, a copper pre-plating mechanism, a copper plating mechanism, a second cleaning mechanism, a passivation mechanism, a drying mechanism and a collecting mechanism. The discharging mechanism is used for unwinding a machined strip, the machined strip is machined by the first cleaning mechanism, the copper pre-plating mechanism, the copper plating mechanism, the second cleaning mechanism, the passivation mechanism and the drying mechanism in sequence during machining and then is wound on the collecting mechanism, the copper pre-plating mechanism adopts high-current electroplating treatment, and the copper plating mechanism adopts low-current electroplating treatment. According to the device and method, a certain sand surface is met, axial sliding deviation of a wound coil cake body is prevented, a bone-shaped structure is avoided, the problem that a superconducting layer is corroded by liquid is solved, and the electroplated superconducting strip is good in quality and high in electroplating efficiency.

The invention relates to the field of petroleum drilling, well completion and cementing equipment, in particular to a metal rubber bearing and sealing-based expandable liner hanger joint. The joint comprises a bushing, a variable diameter liner, sealing elements and an expansion cone, wherein the sealing elements sleeve the outer wall of the upper section of the variable diameter liner in an equal spacing manner; the part, which is provided with the sealing elements, of the variable diameter liner sleeves in the bushing; the expansion cone is arranged on the variable diameter liner; the basic conception of the joint is that metal rubber cylinders are adopted as the sealing elements, the metal rubber cylinders closely sleeve the outer wall of the variable diameter liner, rough surfaces which are subjected to roughness machining are adopted as the outer wall surface of the variable diameter liner of a matching section for the metal rubber cylinders to sleeve and the inner wall of the bushing on the matching sections of the metal rubber cylinders. The metal rubber cylinders are adopted as the sealing elements; the mounting surfaces of matching parts are roughened to realize structural stability, high sealing property, extremely high oil resistance and acid resistance and anti-aging property, prolong the service life of the expandable liner hanger joint, improve the working efficiency and reduce the operation cost.

The invention discloses a scooter engine with a balance shaft. The scooter engine comprises a crankcase defined by a left crankcase body and a right crankcase body. An engine oil pump, a rotary crankshaft and the rotary balance shaft are mounted in the crankcase. The crankshaft is sleeved with a balance shaft driving gear. The balance shaft is sleeved with a balance shaft driven gear. The engine oil pump is sleeved with an engine oil pump driven gear. The balance shaft driving gear is engaged with the balance shaft driven gear. The balance shaft driven gear is engaged with the engine oil pump driven gear. A first arc baffle is arranged on the inner surface of the left crankcase body. A second arc baffle corresponding to the first arc baffle is arranged on the inner surface of the right crankcase body and provided with a first oil drainage port. A third arc baffle is arranged on the outer surface of the right crankcase body and provided with a second oil drainage port. By the adoption of the structure, the volume of the crankcase does not need to be increased, and vibration and noise of the scooter engine are reduced effectively; and gear transmission is adopted in the crank shaft, the balance shaft and the engine oil pump, reliability is improved, and the service life is prolonged.

The invention discloses a nuclear emergency robot deformable composite chassis and an application method thereof, and relates to the technical field of nuclear emergency equipment. The nuclear emergency robot deformable composite chassis comprises a base and motion supporting devices. Mounting notches used for mounting the motion supporting devices are formed at the two sides of the front end andthe two sides of the rear end of the base correspondingly. The motion supporting devices are installed at the two sides of the front end and the two sides of the rear end of the base. Each motion supporting device comprises a hydraulic motor A, a hydraulic motor B, a telescopic sleeve, a supporting shell, a wheel belt assembly and a driving assembly. The application method of the chassis is basedon the nuclear emergency robot deformable composite chassis, and comprises a method for improving the operation stability of a nuclear emergency robot, a method for crossing obstacles on the ground and a method for improving the operation range of the nuclear emergency robot. When the method is applied to the nuclear emergency robot, the application range of the nuclear emergency robot can be greatly expanded.

The invention relates to a card smashing machine. The card smashing machine comprises a transmission assembly and a cutter shaft assembly; the cutter shaft assembly comprises two cutter shafts which are arranged in a spaced manner in parallel, and each cutter shaft is provided with a plurality of annular space rings and a plurality of annular blades with cutter noses; the position, between every two adjacent annular blades, on each cutter shaft is provided with one annular space ring, so that gaps are reserved between the adjacent annular blades; a groove is formed in the outer annular wall of each annular space ring in the circumferential direction of the annular space ring, the cutter noses of the annular blades on one cutter shaft extend to the corresponding grooves of the annular space rings on the other cutter shaft, and the cutter noses and the grooves are distributed in an adjoining manner; a discharging opening of the transmission assembly is formed above the gap between the opposite inner sides of the two cutter shafts; and when the card smashing machine is used, the two cutter shafts reversely rotate to the opposite inner sides, and the annular blades are driven to conduct cutting smashing on cards entering the position between the two cutter shafts. A groove is formed between every two adjacent annular blades, the top ends of the cutter noses are closely arranged along the grooves, the distances between the cutter noses and the corresponding cutter shafts can be reduced, and the diameter of the cutter shafts can be increased under the same conditions.

The invention discloses a socket type pipe fitting structure. The structure comprises a pipe body, a bearing port and an inserting port; a chute is formed in the end surface of the bearing port; an inner groove is formed in the inner wall of the bearing port at the tail end of the chute; a release preventing block and a limiting block are fixed on the outer wall of the inserting port in sequence; a distance from the release preventing block to the end surface of the inserting port is smaller than a distance from the limiting block to the end surface of the inserting port; in a direction of pointing from the inserting port to the bearing port, an included angle of larger than 0 degree is formed between a connecting line, of the release preventing block and the circle center, and a connecting line, of the limiting block and the circle center; the length of the inner groove in the axis direction of pipe fittings is larger than the length of the release preventing block in the axis direction of the pipe fittings; and the axial distance between the release preventing block and the limiting block is larger than the length of the chute in the axis direction of the pipe fittings, and is smaller than the length sum of the chute and the inner groove in the axis direction of the pipe fittings. The structure uses the release preventing block for achieving the purpose of preventing axial slippage of two inserted pipe fittings, and uses the limiting block for achieving the purpose of preventing relative rotation of the two inserted pipe fittings, so that the inserting connection reliability is greatly improved.