69results about How to "No relative rotation" patented technology

A high-speed train shaft-mounted brake disc with a slider structure comprises a disc body, a disc hub, pressing plates and fasteners. The disc body and the disc hub are each provided with teeth which are evenly distributed in the circumferential direction. Each tooth is provided with an installation hole. The installation holes formed in the disc body and the disc hub are fixed through the fasteners. The high-speed train shaft-mounted brake disc further comprises sliders. Each slider comprises an upper end and a lower end which are of a concentric step cylindrical shaft structure. Each slider is provided with a through hole penetrating through the corresponding upper end and the corresponding lower end. The outer diameter of each upper end is smaller than that of the corresponding lower end. Each installation hole comprises a bolt hole body and a slider hole body. The slider hole bodies are formed at intervals. The upper end of each slider is inserted in the corresponding slider hole body in the disc body. The lower end of each slider is inserted in the corresponding slider hole body in the disc hub. According to the high-speed train shaft-mounted brake disc, the structure of an original brake disc is changed, and the sliders are additionally arranged on the basis of maintaining the disc body, the disc hub, the pressing plates and the fasteners. It can be directly guaranteed that the disc body and the disc hub cannot rotate relatively through the sliders. Meanwhile, the risk of breakage of bolts is lowered indirectly.

The invention discloses an earthquake-resistant building support connecting structure which comprises a longitudinal steel pipe and a transverse steel pipe which are made of square steel. A fixing sleeve is arranged on the longitudinal steel pipe. A supporting flange is arranged on the outer wall of the upper end of the fixing sleeve. A step groove is formed in the inner wall of the upper end of the fixing sleeve. Clamping parts are arranged on the upper end face and the lower end face of the tail end of the transverse steel pipe respectively and perpendicular to the transverse steel pipe. The clamping part on the lower side can be embedded in the step groove. A through hole is formed in the transverse steel pipe. The axis of the through hole is parallel to the connecting line of the two clamping parts. Fixing holes are formed in the supporting flange. The longitudinal steel pipe is sleeved with a movable sleeve. The stable connection structure can be formed by the longitudinal steel pipe and the transverse steel pipe, so the longitudinal steel pipe and the transverse steel pipe can not move relatively in the horizontal direction or the vertical direction, the structure is stable, and connection is reliable.

The invention relates to the technical field of assembly of thin-wall cylinders such as superconducting magnet cylinder in particular to a tool for adjusting the coaxiality of a thin-walled cylinder.The tool comprises the thin-walled cylinder, a supporting shaft, an adjustable supporting leg base and an adjustable supporting leg set; the supporting shaft is arranged on the axis of the thin-walledcylinder, and in addition, the two ends of the supporting shaft are located outside the thin-walled cylinder; the adjustable supporting leg base sleeves the outer wall of the supporting shaft; the adjustable supporting leg set comprises a preset number of adjustable supporting legs, and the adjustable supporting legs are arranged in the radial direction of the thin-walled cylinder; one ends of the adjustable supporting legs are connected to the adjustable supporting leg base; and the other ends of the adjustable supporting legs are attached to the inner wall of the thin-walled cylinder. The tool for adjusting the coaxiality of the thin-walled cylinder has the advantages of being good in structural stability, convenient to install, low in manufacturing cost, high in efficiency and capableof conveniently and quickly adjusting the cylinder to be of relatively high coaxiality.

The invention discloses a winch gear-shift clutch, which comprises a shell and a handle, wherein the shell is internally provided with a clutch cam gear shaft; a gear-shift cam shaft and a gear-shift clutch shaft are inserted into the clutch cam gear shaft; the cam curve surfaces on the clutch cam gear shaft and the gear-shift cam shaft are linked to fit in sequence; and a clutch reset spring is arranged between the clutch cam gear shaft and the shell, a gear-shift reset spring is arranged between the gear-shift cam shaft and the shell, the gear-shift clutch shaft is provided with a positioning component sliding on the cam curve surfaces, and the handle is fixedly connected with the gear-shift clutch shaft. The winch gear-shift clutch has the advantages of simple operation and reliable operation, and increases a double-speed function under the conditions that the winch function is not reduced and the ratio of the weight to the pull force of the winch is not reduced. Clutching and gear shifting are integrated, namely gear shifting and clutching share one operating handle; two actions generated by the gear-shift and clutch components are organically combined with the speed reducer; and the winch speed reducer gear automatically carries out separation and mesh. The winch gear-shift clutch has the advantages of convenient and reliable operation, compact structure, low fault rate and long service life.

The invention discloses a device and a method for testing static and dynamic variable friction of a telescopic mechanism. The device comprises a test bed, a loading device, the telescopic mechanism and a test device. An outer tube of the telescopic mechanism is fixed on the test bed through an adaptation tool, an electromechanical loading device is connected with an inner tube of the telescopic mechanism through a steel wire rope and a tension sensor to exert axial load on the telescopic mechanism. The front end of the inner tube of the telescopic mechanism applies transverse load through a section counter weight. The tension sensor measures the horizontal tension applied by the loading device, a low-frequency acceleration sensor is installed at the front end of the counter weight to measure the swinging acceleration and the additional tension caused by the counter weight, a pull rope displacement sensor is used for measuring the horizontal sliding displacement of the inner tube, and strain foils are bonded to the outer tube at different positions to monitor the deformation conditions of the outer tube in the sliding process of the inner tube. The device has the advantages of being convenient to use and operate, stable and reliable in performance, high in measurement accuracy, wide in application range and the like.

The invention discloses a prefabricated construction site supervision device and system based on BIM. The device comprises a base, a support table, a first support rod and a second support rod, wherein a rotary shaft is transversally installed on the base through a support seat; a first external thread and a second external thread which have opposite spiral directions are formed on the rotary shaft; a first thread seat and a second thread seat are installed on the rotary shaft in a sleeved manner; one end of the first support rod is hinged to the support table, and the other end of the first support rod is hinged to the first thread seat; one end of the second support rod is hinged to the support table, and the other end of the second support rod is hinged to the second thread seat; and amonitor unit is arranged on the support table, and internally provided with a BIM building model presetting module. A building construction process is supervised by virtue of a BIM building model, andproblem points are marked, so that management is facilitated, the high efficiency of a BIM technology in building information management can be embodied, and an important role is played in the aspects of increasing the production efficiency, saving the cost, and shortening the construction period, in the building construction process.

The invention discloses a manually-operated ultraviolet disinfecting lamp. The manually-operated ultraviolet disinfecting lamp comprises a base, a left end cover, a right end cover, an outer cover, aninner cover, lamp holders, lamp tubes and a knob, wherein the left end cover is arranged at the left end of the base; the right end cover is arranged at the right end of the base; one end of the outer cover is connected with the left end cover, and the other end of the outer cover is connected with the right end cover; one end of the inner cover is rotationally connected with the left end cover,and the other end of the inner cover is rotationally connected with the right end cover; the inner cover is sleeved by the outer cover; the lamp holders are arranged at the two ends of the inner cover; the two ends of the lamp tubes are connected with the lamp holders respectively; and the knob is connected with the inner cover through a gear set. The lamp tube protecting cover is opened through the knob, and after a time delay, the lamp tubes are lightened so as to prevent personnel from being directly irradiated by the ultraviolet disinfecting lamp and protect the lamp tubes when the lamp tubes do not work.

The invention discloses a mechanical hand used for grabbing disc parts, and relates to the field of mechanical hands. The mechanical hand is mounted on a mechanical arm, and comprises a supporting device, a mould, a drive device, an adsorbing device and a controller, wherein a groove is formed in the bottom of the supporting device; the mould is arranged on the supporting device; the upper part of the drive device is connected with the mechanical arm; the bottom of the drive device is connected with the supporting device; the drive device drives the supporting device to move up and down; the adsorbing device comprises a vacuum pump and a gas exhaust hole; the vacuum pump and the gas exhaust hole communicate with the groove; a first solenoid valve is arranged between the vacuum pump and the groove; a second solenoid valve is arranged between the gas exhaust hole and the groove; and the controller is connected to the first solenoid valve and the second solenoid valve. The mechanical hand used for grabbing disc parts provided by the invention can complete operation of stamping and shaping, grabbing and releasing the parts, is high in degree of automation, is simple in structure and is convenient to use.

The invention relates to the technical field of force measurement, especially a straw pulling force tester. The tester comprises a vertical maintaining mechanism, a clamping mechanism, a lifting mechanism, and a support. The vertical maintaining mechanism comprises a workbench, a spherical sleeve, and a compression device. The spherical sleeve is disposed at the center of the workbench, and is located in the workbench. The bottom of the spherical sleeve is fixedly provided with a rectangular projection, and the interior of the inner cavity of the spherical sleeve is provided with a lifting mechanism. The external surface of the spherical sleeve is spherical, and cooperates with the workbench. The spherical sleeve rotates in the workbench, and enables the lifting mechanism and the clamping mechanism to remain vertical under the action of gravity. One end of the compression device is spherical, and contacts with the spherical sleeve. The lifting mechanism comprises a pulling hand wheel, a threaded sleeve, a pulling rod, and a strain-type pulling force sensor. The center of the pulling rod is provided with a cavity, and the bottom of the pulling rod is fixedly connected with the clamping mechanism. The tester is simple in structure, is convenient to operate, and can precisely measure the pulling force of straw.

The invention relates to the technical field of electric motor end cover machining, in particular to a electric motor end cover manufacturing and machining fixing device. The electric motor end cover manufacturing and machining fixing device comprises a bottom machine frame, a connecting shaft, a fixing machine frame and a clamping and limiting mechanism. The electric motor end cover manufacturing and machining fixing device can solve the following problems that in the traditional electric motor end cover clamping and limiting process, due to the fact that the models and specifications of electric motors are different, traditional electric motor end cover clamping and limiting equipment can only clamp and limit electric motor end covers of a single specification, and the electric motor end cover may relatively slide in the rotation process. According to the electric motor end cover manufacturing and machining fixing device, arc-shaped protrusions on a rotating roller and a supporting frame cooperate with each other to drive a clamping plate to carry out inner supporting on the electric motor end covers of different specifications, so that the supporting and limiting range of the clamping and limiting mechanism is wider; and a limiting frame in a limiting branch chain can carry out position limiting treatment on the electric motor end covers through mutual cooperation of a traction rope and a moving block, and therefore it is ensured that the electric motor end covers cannot rotate relatively in the finish machining process.

A torsional vibration damper or a torsionally flexible coupling comprises an inner part (11) and an outer part (12) that is arranged in ring shape around this inner part, which arc joined to one another in a torsionally flexible manner by means of spring elements (13.1, 13.2), wherein the spring elements (13.1, 13.2) subdivide a space formed between the inner part (11) and the outer part (12) into a plurality of successive chambers in the circumferential direction of the damper or the coupling, with these chambers being filled with a viscous medium and connected to one another. There are at least two groups of spring elements (13) which have deflection lines that differ in the circumferential direction. In case of a relative rotation between the inner part (11) and the outer part (12), owing to the differences in the deflection lines, there is a strong spatial displacement of the damping medium, so that such a damper or coupling has a high damping potential. The damping action can be influenced by the overflow behavior between the chambers (14), which are connected to one another directly through the spring elements (13.1, 13.2).

A high-speed train shaft-mounted brake disc with a slider structure comprises a disc body, a disc hub, pressing plates and fasteners. The disc body and the disc hub are each provided with teeth which are evenly distributed in the circumferential direction. Each tooth is provided with an installation hole. The installation holes formed in the disc body and the disc hub are fixed through the fasteners. The high-speed train shaft-mounted brake disc further comprises sliders. Each slider comprises an upper end and a lower end which are of a concentric step cylindrical shaft structure. Each slider is provided with a through hole penetrating through the corresponding upper end and the corresponding lower end. The outer diameter of each upper end is smaller than that of the corresponding lower end. Each installation hole comprises a bolt hole body and a slider hole body. The slider hole bodies are formed at intervals. The upper end of each slider is inserted in the corresponding slider hole body in the disc body. The lower end of each slider is inserted in the corresponding slider hole body in the disc hub. According to the high-speed train shaft-mounted brake disc, the structure of an original brake disc is changed, and the sliders are additionally arranged on the basis of maintaining the disc body, the disc hub, the pressing plates and the fasteners. It can be directly guaranteed that the disc body and the disc hub cannot rotate relatively through the sliders. Meanwhile, the risk of breakage of bolts is lowered indirectly.

Disclosed is a power supply wiring column structure. The power supply wiring column structure comprises an upper thin column, a middle epitaxial base and a lower thin column connected from the top tobottom in sequence; an inwardly concave injection molding groove is formed in the side periphery of the middle epitaxial base; the injection molding groove adopts a one-way opening structure and comprises an upper groove edge, a left groove bottom and a lower groove edge; the inner end of the upper groove edge is connected with the inner end of the lower groove edge through the left groove bottom;a groove opening is clamped between the outer end of the lower groove edge and the outer end of the upper groove edge; the upper thin column, the middle epitaxial base and the lower thin column are coaxially arranged; the radius of the middle epitaxial base is greater than that of the upper thin column and the lower thin column; and the horizontal distance between the shared axle wire of the upper thin column and the lower thin column and the left groove bottom is less than the radius of the upper thin column. By virtue of the design, it is ensured that the power supply wiring column does notrotate relatively in the assembling and use process, and relatively high safety, relatively high production efficiency and relatively low cost are achieved.

The invention relates to an anti-rotation threaded radio-frequency coaxial connector, which comprises a plug and a socket butted with the plug, wherein the plug comprises a first shell, a threaded sleeve, a connecting sleeve and a spring; the socket comprises a second shell; an annular inner tooth belt is arranged on an inner wall of the connecting sleeve; an annular outer tooth belt is arranged on an outer wall of the second shell; the annular inner tooth belt can be meshed with the annular outer tooth belt; L-shaped guide locking grooves are arranged in the threaded sleeve; locking bumps arearranged on the connecting sleeve; and the connecting sleeve elastically moves in the L-shaped guide locking grooves through the spring, thereby achieving locking and unlocking of the threaded sleeve. The invention further relates to a circumferential anti-rotation mechanism, which comprises the second shell and the connecting sleeve, wherein the annular inner tooth belt is arranged on the connecting sleeve; the annular outer tooth belt is arranged on the second shell; and the annular inner tooth belt can be meshed with the annular outer tooth belt. The anti-rotation threaded radio-frequencycoaxial connector is convenient and fast to disassemble, assemble and use, small in volume, reliable in connection and stable in signal, and the self-locking anti-loose function on the threaded sleeveand the anti-rotation function between the shells when the plug and the socket are in a plug-in deadlocking state can be achieved.

The invention relates to the field of engineering and discloses a rotation device and a tower crane. The rotation device comprises a first support (1) and a second support (2) which can rotate relatively. The first support is provided with a clamping part (10). The second support is provided with a positioning part (20) provided with a first limiting part (21). The rotation device further comprises a limiting part (30) and a detection part (40) used for detecting the position state of the limiting part. The limiting part (30) is installed between the clamping part (10) and the positioning part (20) and is used for limiting the rotation between the first support and the second support when matched with the first limiting part (21). The detection part (40) is electrically connected with a rotation control mechanism so as to control a rotation drive mechanism to be in a locked state when the limiting part (30) is matched with the first limiting part (21). It is effectively ensured that an upper vehicle cannot rotate relative to a lower vehicle when the crane is heightened and lifted, and construction safety is reliably ensured.

The invention relates to an assembly method of an automobile engine for reducing timing error, which can effectively reduce the timing error. The technical proposal is as follows: in the assembly method of an automobile engine for reducing timing error, after a crank shaft and a cam shaft are fixed, crank shaft and cam shaft timing gears, a tensioner and an idler wheel are assembled, a timing timming belt is arranged, and finally a cam shaft timing gear bolt is screwed up; the method is characterized in that when the cam shaft timing gear bolt is screwed up, no relative rotation of the timing gear and the cam shaft is ensured.

The invention relates to a weak current engineering wire pipe connecting device. The connecting device comprises an insulating pipe, a cooperating insulating pipe, a mounting pipe, a cooperating mounting pipe, a mounting sleeve, a cooperating mounting sleeve, a positioning sleeve, a positioning block, a fastening sleeve and a fastening flange, wherein the mounting pipe is connected to the outer side of the insulating pipe through threads, the mounting sleeve is adapted to the outer side of the mounting pipe and is connected with the mounting pipe, the cooperating insulating pipe is connected with the cooperating mounting pipe through threads, and the cooperating mounting pipe is adapted to the mounting pipe and is connected with the mounting pipe; and the cooperating mounting pipe is provided with a mounting bulge, the mounting pipe is provided with a mounting bulge slot, the mounting bulge slot is connected with the mounting bulge, the cooperating mounting sleeve is adapted to the outer side of the cooperating mounting pipe and is connected with the cooperating mounting pipe, the cooperating mounting sleeve is provided with a positioning block slot, the positioning block slot is connected with the positioning block, and a positioning bulge is arranged in the middle of the positioning block.

The invention discloses a cylindrical pile leg self-elevating platform jetted pile connector. One end of a hammering union joint serves as a butt welding end and is connected with a jetted pipe in a pile leg in a butt welding mode, and the other end of the hammering union joint serves as an internal thread female hammer union and is connected with a jetted pipe hose and welded to a hole formed inthe wall of the pile leg. The jetted pipe hose is connected with a pile leg jetted pipe connector through a male hammering union with a wing-shaped loose external thread sleeve. The external thread sleeve and the male union can be rotated mutually. It is ensured that the sealing surface cannot rotate relatively in the process of connecting and dismantling the hose. When not in use, the jetted pipeconnector needs to be blocked with a choke plug. The choke plug is composed of two parts, namely, the hex socket external thread head and the male hammering union choke plug which are connected through a screw. The thread head and the choke plug can rotate mutually. It is ensured that the sealing surface cannot rotate relatively in the process of connecting and dismantling the choke plug. A portable pneumatic outer hexagonal wrench can be used for dismounting and mounting the choke plug.

The invention provides an annular elastic polishing tool and relates to the technical field of precise machining. The annular elastic polishing tool comprises a tool base, an elastic body and a connecting piece, wherein the elastic body is detachably connected with the tool base through the connecting piece and is of an annular structure. According to the annular elastic polishing tool, a machining face is an annular arc face, and the contact area between the annular arc face and a workpiece is an annular belt and is larger compared with a circular contact area between a spherical tool, so that the machining efficiency of workpieces (with planes / spherical surfaces / non-spherical surfaces) is effectively improved; the arc surface radius of the tool and the overall size of the tool are designed flexibly, and the tool can polish curved surface workpieces of different sizes and curvatures; and the elastic body has stable rigidity, and the machining effect is more stable.

The invention relates to the technical field of filters, and in particular to a composite gas filter which comprises a shell (1) and a connector (2), and further comprises a propping sleeve (6), a bottom ring component (7), a first filtering net component (8), a sintering filter core (9) and a first elastic part (10), wherein a mounting groove (3) is formed inside the shell (1); a groove (4) is formed in the connector (2); the bottom ring component (7) is connected inside the mounting groove (3) in a clamping manner; the propping sleeve (6) is positioned inside the groove (4); the first filtering net component (10) is positioned inside the propping sleeve (6); the top end of the first filtering net component (8) is propped against an end part of the propping sleeve (6); when the connector (2) is tightly screwed with the shell (1), the top end of the first filtering net component (8) is propped against the bottom ring component (7) through the propping sleeve (6); the sintering filter core (9) is positioned inside the first filtering net component (8). By adopting the structure, the composite gas filter that the filtering net component is not liable to damage and thus the filtering effect can be stable is provided.

The invention belongs to a grinding device for automobile parts. The grinding device includes a machine frame, a grinding motor and a grinding disc. The grinding motor is fixed to the machine frame, an output shaft of the grinding motor is connected to the grinding disc, and the machine frame is provided with a driving mechanism, a fixing mechanism and a limiting mechanism. The fixing mechanism includes a clamping jaw and a fixed seat, a hoop which can clamp the automobile parts is rotatably connected into the fixed seat, and the fixed seat is matched with the machine frame in a sliding mode.The limiting mechanism includes a rotating shaft, a cam and a swing rod, the driving mechanism includes a driving motor, a screw rod and a screw element, and the cam is coaxially and fixedly providedwith a rotating table. An output shaft of the driving motor is fixedly connected with the rotating shaft, the rotating shaft is slidably connected with the screw rod, and the screw rod is fixedly connected with the clamping jaw. A groove is formed in the side wall of the rotating plate, a protrusion is arranged in the circumferential direction of the rotating shaft, one end of the swing rod is hinged to the machine frame, the other end of the swing rod abuts against the circumferential surface of the cam, the swing rod is provided with a connecting rod, and the screw rod is matched with a nutin a threaded mode. A limiting part is slidably connected to the machine frame, and the limiting part is fixedly connected with the connecting rod. The grinding device can grind the automobile parts uniformly and the grinding effect is better.

The invention relates to the technical field of motor end cover processing, in particular to a motor end cover manufacturing and fixing device, including a bottom frame, a connecting shaft, a fixed frame and a clamping and limiting mechanism; the present invention can solve the following problems: the traditional motor During the clamping and limiting process of the end cover, due to the different models and specifications of the motor, the traditional motor end cover clamping and limiting device can only clamp and limit the motor end cover of a single specification; the motor end cover may occur during the rotation process. Relative sliding; the present invention cooperates with the arc-shaped projection on the rotating roller and the support frame to drive the clamping plate to support the motor end covers of different specifications, so that the clamping limit mechanism has a wider range of support and limit, In the limiting branch chain of the present invention, the limiting frame can limit the position of the motor end cover through the mutual cooperation of the traction rope and the moving block, so as to ensure that the motor end cover will not rotate relative to each other during the finishing process.

The invention discloses a damper with a one-way buffer function. The damper with the one-way buffer function comprises a protection shell, a rotor assembly, a sliding rod and a rack, wherein a receding groove is formed in the sliding rod, the rack is fixed on the part, located at the receding groove, of the left inner wall of the sliding rod, a protective inner cavity is formed inside the protection shell, and the rotor assembly is rotationally arranged in the protective inner cavity and is in clearance meshing connection with the protection shell; and the protection shell is transversely andslidably inserted into the sliding rod, so that the rotor assembly is in meshed connection with the rack. According to the damper, the rotor assembly is in clearance meshing connection with the protection shell, the rotor assembly is in meshed connection with the rack, when the rotor assembly is in meshed connection with the protection shell and the rack correspondingly, the rotor assembly generates buffering movement due to relative resistance, when the rotor assembly is only in meshed connection with the rack, the rotor assembly generates free rotation movement due to the lack of resistanceof the protection shell, so that the purpose of one-way buffering is achieved.

The invention discloses a cement concrete pavement grooving device for highway engineering, and relates to the technical field of highway engineering. The device comprises a fixing plate and a mounting shaft, a first inner cylinder and a second inner cylinder are arranged on the mounting shaft in a sleeving mode, one end of the first inner cylinder is inserted into the second inner cylinder and connected with the second inner cylinder, a first spring is connected between the first inner cylinder and the second inner cylinder, and the first inner cylinder is sleeved with a first connecting ring and rotationally connected with the first connecting ring; one side of the first connecting ring and one side of the second connecting ring are connected with auxiliary rods, one ends of the auxiliary rods are connected with guide blocks, the protective cover is connected with the bottom of the fixing plate, the guide blocks are connected with the protective cover, and the connecting direction of the guide blocks is the same as the axial direction of the mounting shaft. A rubber strip is arranged on the side, close to the grooving cutter, of the auxiliary rod. The grooving device has the advantages that the distance between the grooving cutters can be conveniently adjusted, and the surfaces of the grooving cutters can be cleaned.

Disclosed is a full-automatic teaching blackboard. A mechatronics method is adopted, a main motor drives a chain device to drive the reel type blackboard formed by an elastic steel sheet, and the set motion of the blackboard face of the blackboard is achieved by applying a PLC control device. The full-automatic teaching blackboard comprises a blackboard panel, a support board, an upper reel, a lower reel, the main motor, a chain wheel and chain device, an erasing device, a control panel, a control box and the like. The blackboard panel is supported in a blackboard structure frame through the upper reel and the lower reel. The upper reel and the lower reel are driven by a roller chain wheel and a roller chain which are driven by the main motor. The back of the blackboard panel is supported by the support board. When the main motor drives a driving shaft to rotate, the driving shaft drives a left driving chain wheel and a right driving chain wheel to rotate simultaneously, the driving chain wheels drive an upper driven chain wheel and a lower driven chain wheel to rotate correspondingly at the same speed, so that the upper reel and the lower reel are driven to rotate at the same speed, and the blackboard is driven to move up and down. Through control of the control box, forward rotation, reverse rotation, distance rotation, timing rotation and other functions of the reels of the blackboard can be achieved, and the full-automatic usage requirements are met.

The invention discloses an earthquake-resistant building support connecting structure which comprises a longitudinal steel pipe and a transverse steel pipe which are made of square steel. A fixing sleeve is arranged on the longitudinal steel pipe. A supporting flange is arranged on the outer wall of the upper end of the fixing sleeve. A step groove is formed in the inner wall of the upper end of the fixing sleeve. Clamping parts are arranged on the upper end face and the lower end face of the tail end of the transverse steel pipe respectively and perpendicular to the transverse steel pipe. The clamping part on the lower side can be embedded in the step groove. A through hole is formed in the transverse steel pipe. The axis of the through hole is parallel to the connecting line of the two clamping parts. Fixing holes are formed in the supporting flange. The longitudinal steel pipe is sleeved with a movable sleeve. The stable connection structure can be formed by the longitudinal steel pipe and the transverse steel pipe, so the longitudinal steel pipe and the transverse steel pipe can not move relatively in the horizontal direction or the vertical direction, the structure is stable, and connection is reliable.

The invention relates to a rotation-preventive assembly applied to a lithium-ion battery and pertains to the technical field of lithium-ion battery. The rotation-preventive assembly applied to the lithium-ion battery comprises a cap installed on the end part of the shell of the lithium-ion battery and provided with a pole and a top cover which are welded with each other. The assembly is characterized in that the external edges of the top cover and the shell, which are installed and matched with each other, have a non-circular structure. The device improves the torque of positive electrode mast and negative electrode mast theoretically and fundamentally, prevents relative rotation of the battery shell and the cap, and has the advantages of simple structure, convenient installation, high production efficiency, safe use, high protective performance level and the like.

The invention discloses a support landing device for rapid construction of a bridge, which is mounted on a supporting column and comprises a support, a lifting part and a driving mechanism, the support is fixed to the top end of the supporting column. The lifting piece is slidably arranged on the support. The driving mechanism comprises a mounting seat, a turbine, a worm, a rotating part and a motor; the mounting seat is fixed on the bracket, the worm is rotationally arranged on the mounting seat, the motor is fixed on the mounting seat, and an output shaft of the motor is fixedly connected with the end part of the worm; a rotating shaft is fixedly arranged on the lower surface of the turbine and is rotationally connected with the mounting seat; the rotating part comprises a first lead screw and a rotating rod, the bottom end of the first lead screw is fixedly connected with the top end of the rotating rod, the bottom end of the rotating rod penetrates through the turbine, the rotating rod is fixedly connected with the turbine, and the turbine is meshed with the worm. According to the support landing device, the falling efficiency of workers is improved.