4554 results about "Ball bearing" patented technology

The invention discloses a lifting device for an elevator car. The lifting device comprises a screw rod, a bearing base and a limiting top plate, wherein the elevator car is arranged between the bearing base and the limiting top plate, the bearing base is provided with a ball sleeve and a driving device used for driving the ball sleeve to rotate, and auxiliary supporting columns are arranged belowthe bearing base; the bearing base comprises a base, a bottom plate and an arc-shaped plate, wherein the arc-shaped plate is hinged to the bottom plate, the base is provided with a fixing groove, thebottom of the fixing groove is provided with through holes, and the auxiliary supporting columns pass through the through holes to temporarily support the bottom plate; and the driving device drives the ball sleeve to rotate, so that the bearing base is lifted along the screw rod, the bottom plate is gradually separated from the support of the auxiliary supporting columns, and the bottom plate andthe arc-shaped plate are pressed into the fixing groove through the elevator car under the guide of the arc-shaped plate. According to the lifting device, the elevator car is convenient and fast to install, and the elevator car can be easily replaced in the later period.

The invention belongs to the technical field of robot and intelligent equipment driving, and discloses an integrated servo push rod and a control method.A push rod module is integrally designed, and a high-density motor, a ball push rod and a band-type brake are arranged in the push rod module. The invention has the characteristics of high power density, small volume, high precision, high response speed, low noise, long service life, high reliability and the like. The inside of the push rod is contacted with the deep groove ball bearing at the tail end of the screw rod through the ball retainer, and the outside is contacted with the oil-free bushing, so that the lateral strength of the push rod is improved, friction is reduced, and operation efficiency is improved. A linear encoder is arranged at the end of the screw rod, accurate control of the tail end can be achieved, a magnetic encoder is arranged at the tail end of the motor, input and output end double-closed-loop can be achieved, precision can be improved, and errors of band-type brake in power-off response time can be compensated; the lead screw is connected with the motor through the diaphragm coupling in the motor, so that the axial space is saved, and the service life of the motor is prolonged.

The invention relates to the technical field of aero-engine rotor vibration tests, in particular to an aero-engine rotor unsteady-state thermally induced vibration test system which comprises a rotor experiment table, an air inlet and exhaust system, a lubricating oil system, a protection system and a heating system. The rotor experiment table comprises a first supporting system, a second supporting system, a rotor outer protection casing, a gas compressor disc, a gas compressor sealing disc, a turbine disc, a turbine front sealing disc, a front shaft diameter, an inter-disc drum, a rear shaft diameter, a first squirrel-cage elastic support, a ball bearing, a second squirrel-cage elastic support and a rolling rod bearing. The first supporting system is composed of a first squirrel-cage type elastic support and a ball bearing, meanwhile, an air inlet is formed in the first supporting system, and the ball bearing in the first supporting system is connected with the front shaft diameter in an interference fit mode. Rotor unsteady-state characteristics considering heating conditions are finally created, and vibration response and durability of a wheel disc structure under the unsteady-state thermal load condition are studied in combination with test conditions such as temperature vibration and the like.

The invention provides a ball bearing clearance measuring tool for a bulb tube, a ball bearing to be measured comprises a bearing body, a bearing outer ring and a rolling body, and the measuring tool comprises a support; the bearing support is provided with a bearing containing cavity used for containing the ball bearing, and the bearing outer ring is tightly pressed in the bearing containing cavity. The limiting mechanism is used for limiting the bearing outer ring to move relative to the bearing support in the axial direction of the ball bearing; the rotating mechanism is used for driving the support to rotate and further driving the bearing support to turn over by 180 degrees in the vertical direction, so that the ball bearing is switched between a first limit position and a second limit position, and the axial direction of the ball bearing is in the vertical direction at the first limit position and the second limit position; at the first limit position and the second limit position, the measuring mechanism respectively measures a first numerical value and a second numerical value representing the relative displacement of the bearing body and the bearing outer ring, and the first numerical value and the second numerical value are used for determining the axial clearance of the ball bearing. According to the scheme, the axial clearance measurement accuracy can be improved.

A moving part of the short flexible cylinder active complex parallel radial harmonic transmission is composed of a thin-wall composite short flexible cylinder and two rolling wave generators with roller pins or ball-retainer assemblies. A flexible bearing low-speed moving ring raceway is integrated on one side of the gear, and a full-cylinder-length gear is arranged on the other side of the gear; the two semi-short shafts are fixedly connected to the two ends of a motor rotor respectively, are integrated with flexible bearing high-speed moving ring raceways and are the same in structure size, and a semi-short shaft at one end needs to be coplanar with a semi-long shaft at the other end, so that the two ends of the semi-short shafts generate time-varying radial antisymmetric deformation; the static part is composed of end covers which are fixedly connected to the two ends of the motor stator and provided with rigid gears. A double-convex-arc raceway of a high-speed moving ring of the flexible needle bearing is designed, a convexity needle roller with the middle concave structure dynamically constraining the axial movement amount of a short flexible cylinder and a retainer and various structures facilitating rolling body assembly are used, and a waveform raceway calculation formula of a wave generator for the needle roller is given; therefore, the radial size and the axial size of the active complex radial harmonic transmission can be reduced on the basis of ensuring the transmission precision and the bearing capacity.

The invention belongs to the technical field of tower foot manufacturing, and relates to an automatic clamping device and method for a power tower foot. In the automatic clamping device, a clamping mechanism comprises two right-hand and left-hand trapezoidal lead screws, clamping jaws are movably installed on the right-hand and left-hand trapezoidal lead screws and located on the same horizontal plane, a driving mechanism comprises a driving motor and a cog belt assembly, a rotating shaft of the driving motor is connected with the cog belt assembly, and the cog belt assembly is in meshing transmission connection with the right-hand and left-hand trapezoidal lead screws. According to the automatic clamping method, the inclination angle of the clamping jaws is adjusted to be matched with the shape of a workpiece, the rotating shaft of the driving motor rotates forwards to control the forward and reverse thread trapezoidal lead screw to rotate, the clamping jaws automatically center and clamp the workpiece for welding, the rotating shaft of the driving motor rotates backwards after welding is completed, and the clamping jaws move outwards to loosen the workpiece. The clamping jaw can be controlled to automatically center and clamp a power tower foot workpiece, and the clamping accuracy is improved; and during feeding, balls of the bull eye bearings make contact with the workpieces, and the feeding and discharging efficiency of the workpieces is improved.

A muzzle device for a firearm may include a device body and a plurality of ball bearings. The device body may be configured to be removably secured to a mount body of a mount configured to be secured to a barrel of the firearm, the mount body including a plurality of lugs each extending radially outward relative to a longitudinal axis of the mount and including a stop and a detent. The device body may include a plurality of protrusions each extending radially inward relative to a longitudinal axis of the muzzle device and configured to engage the stop of a respective lug of the mount to prevent rotation of the muzzle device relative to the mount in a first direction. The ball bearings each may be configured to move relative to the device body and to engage the detent of a respective lug of the mount to inhibit rotation of the muzzle device relative to the mount in a second direction opposite the first direction.

The invention relates to the technical field of wind power foundations, in particular to a wind power foundation and a construction method thereof. Comprising a base and four concrete pile foundations, a hydraulic column is installed at the top end of each concrete pile foundation, an expansion supporting piece is arranged on each concrete pile foundation, the movable end of each hydraulic column is hinged to the base, a universal ball seat is embedded in the center of the base, a foundation column is installed on the top face of the universal ball seat, and a limiting disc is installed at the bottom of the foundation column; a set of limiting springs are installed between the limiting disc and the base, the base column is slidably sleeved with a universal sliding sleeve, the top and the bottom of the universal sliding sleeve are each provided with a turbulent flow device, a lantern ring is embedded in the universal sliding sleeve, four universal hinge joints are embedded in the lantern ring, and four hydraulic push rods are hinged to the base. According to the invention, a wind-resistant stable system which takes an electric control system as a core and is deeply linked with the hydraulic push rod, the universal sliding sleeve and the turbulent flow device is constructed, and the technical breakthrough from passive bearing to active counteracting is realized.

The invention relates to the technical field of welding equipment, and discloses welding equipment for fixing automobile shock absorber parts, which comprises a base, a fixing frame is fixedly mounted at the top of the base, a supporting plate is fixedly mounted on one side of the fixing frame, a rotating ring is rotatably mounted on the supporting plate, and a driving assembly is arranged at the bottom of the supporting plate. Through cooperation of the conical grooves and the balls, the clamping plates and the right-angle triangular plates are driven to synchronously get close to the hollow outer cylinder, the bevel edges of the four right-angle triangular plates form uniform and symmetrical clamping force, the hollow outer cylinder can be firmly fixed, the right-angle triangular plates can adjust the distance in a self-adaptive mode according to the diameter of the hollow outer cylinder, and the clamping requirements of parts of different specifications are met; the clamping force is always kept uniform, the pressing plate is matched to drive the upper rotating disc to descend to achieve longitudinal limiting, bidirectional fixing is formed through horizontal clamping of the right-angle triangular plate, the problems of unstable clamping and easy loosening are avoided, a foundation is laid for subsequent precise welding, and the welding seam forming quality is guaranteed.

The utility model relates to the technical field of deviation rectification of a winding device, and provides a deviation rectification device for winding a thin film, which comprises a deviation rectification roller, the deviation rectification roller comprises a rolling shaft main body, a plurality of groups of sliding chutes are uniformly arranged on the rolling shaft main body, a group of deviation rectification plates are arranged in each group of sliding chutes, and the deviation rectification plates can slide in the sliding chutes; a traction rod is fixedly installed on the deviation rectifying plate, and ball seats are installed at the two ends of the traction rod. Adjusting plates are arranged at the two ends of the deviation rectifying roller and installed on the rolling shaft body through self-aligning bearings, the ball seats abut against the adjusting plates, the adjusting plates on the two sides are connected through a linkage shaft, and deviation rectifying driving pieces are further arranged on the two sides of the deviation rectifying roller. When a detection device on the winding machine detects that a thin film deviates, the deviation correction driving piece can drive the adjusting plate to deflect, the deflected adjusting plate drives the deviation correction plate to transversely slide on the rolling shaft body through the traction rod, and therefore deviation of the thin film in the moving process is corrected, and materials on a winding roller can be more orderly.

The invention relates to an internal rotation brushless motor for a treadmill, in particular to the technical field of motors for treadmills, a driving shaft is arranged at the center of a motor shell in a penetrating mode, the driving shaft is connected with the motor shell through a ball bearing, and rotor iron cores are arranged on the two sides of the middle of the driving shaft; the middle parts of the two groups of rotor cores are provided with permanent magnets, the inner wall of the motor shell is connected with a stator assembly, the back part of the stator assembly is provided with a tunnel reluctance element, the outer wall of one side of each rotor core is fixedly connected with a multi-pole magnetic coding ring, one side of the tunnel reluctance element is provided with a micro-electro-mechanical inertial measurement unit, and the outer wall of the rotor core is fixedly connected with a motor shell. The multi-pole magnetic coding ring fixed on the rotor side generates space magnetic field change, the tunnel magnetic resistance element array arranged in the circumferential direction captures magnetic field signals in real time, the Kalman filtering algorithm is fused with magnetic position signals, and detection errors caused by mechanical vibration are eliminated.

The invention relates to the technical field of ball screw pairs, and particularly discloses a ball screw pair which comprises a screw rod, a nut, balls and a reverser, the screw rod is provided with an external thread raceway, the nut is provided with an internal thread raceway, and the external thread raceway and the internal thread raceway are oppositely combined to form a closed raceway for the balls to roll. The reverser is provided with raceway grooves used for communicating the adjacent internal thread raceways, the normal section molded lines of the external thread raceways and the internal thread raceways are each in a double-arc shape, each double-arc shape is composed of two symmetrical arcs, and the curvature centers of the two symmetrical arcs are located on the two sides of the center line of the ball. And two-point angular contact can be formed between the ball and each threaded raceway. The parameter design method of the ball screw pair comprises the following steps: S1, determining design input conditions; s2, preliminarily determining core geometric parameters; s3, determining detailed geometric dimensions; and S4, checking the strength and the service life. According to the scheme, the problem that an existing ball screw pair is insufficient in axial bearing performance is solved.

The utility model relates to the technical field of ball valves, in particular to a sliding support type ball valve ball body grinding device which comprises a grinding table and a ball body, a rotating motor is arranged on the inner side of the grinding table, an installation frame and a bearing disc are fixedly installed on the top of the grinding table respectively, and a grinding oil tank and a hydraulic rod are fixedly arranged on the top of the installation frame respectively. An oil pump is arranged at the top of the grinding oil tank, a supporting column is arranged at the bottom end of a hydraulic rod, an annular pipe is arranged at the bottom of a mounting frame, a fixing rod is rotationally arranged at the top of a bearing disc through a bearing, a mounting hole is formed in the surface of the bottom of a ball, and grinding sleeves are arranged on the outer sides of the ball correspondingly. An adjusting mechanism is arranged between the grinding sleeve and the grinding table, through the arrangement of the sliding support type ball valve ball grinding device, the purpose of accurately adjusting the position of the grinding sleeve is achieved through the structural design in the adjusting mechanism, and it is guaranteed that a ball is evenly ground.

A dishwasher rack is able to rotate with respect to the dishwasher to permit access to all areas of the dishwasher rack from one side of the dishwasher. A skid plate is positioned between the dishwasher rack and a mounting frame to prevent the tines of the dishwasher rack from contacting the tines of the mounting frame. A rotatable member can be used between the dishwasher rack and the mounting frame. The rotatable member has an inner race, an outer race, and a ball bearing assembly positioned between the races. A handle can be coupled to the dishwasher rack.

The invention relates to the field of gantry machining center sliding block lubrication, in particular to an automatic lubricating device for a gantry machining center, which comprises a sliding rail, a sliding block is arranged on the sliding rail in a sliding manner, two first cavities and two second cavities are symmetrically formed in the sliding block, and the second cavities and the first cavities are in one-to-one correspondence and are communicated with each other; two symmetrical L-shaped plates are fixedly connected into the sliding block, through cooperation of the one-way bearing, the walking wheel, the solid ball and the transmission mechanism, manual intervention is not needed, power is provided completely by means of reciprocating motion of the sliding block along the sliding rail, and lubrication can be completed without pausing operation of the machining center; the problem that traditional manual lubrication needs to be stopped is thoroughly solved, the continuity of the machining process is effectively guaranteed, the equipment utilization rate and the production efficiency are remarkably improved, the amount of lubricating oil discharged in each lubricating action is stable, the lubricating defect caused by too much or too little oil is avoided, and meanwhile lubricating oil waste and environmental pollution are reduced.

A wheel assembly for use with a trailer jack includes an outer shell defining a main volume. The wheel assembly may further include a main ball configured to be at least partially contained within the main volume of the outer shell and to contact a ground surface. The wheel assembly may further include a bearing coupled between the main ball and the outer shell and configured to allow motion of the main ball relative to the outer shell. The wheel assembly may further include a coupler configured to couple the outer shell to a shaft of a trailer jack. The wheel assembly may further include a lock configured to retain the main ball in place relative to the outer shell.

The utility model discloses a hot pressing device for preparing a high-precision multilayer circuit board, which comprises a base and a multilayer circuit board body, the upper ends of four corners of the base are fixedly connected with supporting rods, the upper ends of the four supporting rods are provided with the same supporting seat, and the upper end of the central position of the supporting seat is fixedly provided with a hydraulic cylinder; and a horizontal sliding seat is connected among the four supporting rods in a sliding manner. Buffering protection is provided for the material loading seat through the hydraulic buffers and the buffering air bags made of the polyurethane rubber, buffering protection is provided for the pressure bearing seat through the rectangular annular base plate made of the polyurethane rubber, the material loading seat and the pressure bearing seat are prevented from being damaged in the long-term hot pressing process, the service life of the material loading seat and the service life of the pressure bearing seat are prolonged, and the service life of the material loading seat and the pressure bearing seat is prolonged. Balls and limiting grooves are matched with a rectangular annular base plate made of polyurethane rubber to limit the pressure-bearing seat, so that an air cylinder is matched with a jacking block to penetrate through a rectangular opening to jack the pressure-bearing seat out, and the hot-pressed multilayer circuit board in the material carrying seat can be conveniently and quickly taken out.

The invention discloses a positioning racking system for coating a large-size optical element. The positioning racking system comprises a main body structure, a lifting mechanism, a rotary bearing platform, a movement mechanism and a safety protection mechanism. A main body structure adopts a rigid design of composite support of a tripod and a tailstock. The lifting mechanism drives double ball screws to move synchronously through a worm and gear speed reducer, and precise lifting of the bearing platform is achieved. The rotary bearing platform can freely rotate by 360 degrees and is provided with a balance weight groove to adjust the gravity center. And the movement mechanism realizes flexible movement and stable support of the system. The safety protection mechanism integrates inclination angle, overload and limiting detection. The problems that a large-size and high-surface-shape-precision optical element is difficult to mount and position and poor in operation safety in the coating process are solved, and auxiliary mounting and positioning of a tool are safely, conveniently and precisely completed outside a coating machine.

The utility model relates to ceramic ball pressure resistance detection equipment, which belongs to the technical field of ceramic ball detection equipment, and comprises a base, a top plate and a support stand column for connecting the base and the top plate, a hydraulic cylinder is arranged on the base, an adjusting screw rod is arranged on the top plate, a support circular truncated cone is fixed at the top of a piston rod of the hydraulic cylinder, and a mounting boss is arranged at the top of the support circular truncated cone. A replaceable supporting disc and a pressure-bearing disc are arranged above the mounting boss, an embedding groove for embedding the mounting concave table is formed in the bottom of the replaceable supporting disc, a supporting groove matched with the pressure-bearing disc is formed in the top of the replaceable supporting disc, a flexible protecting sleeve for protecting the piston rod is arranged on the outer side of the supporting circular table, and a detachable and replaceable pressing plate is arranged at the bottom of the adjusting lead screw. The pressure-bearing disc can be replaced independently when worn; the flexible protection sleeve can protect the piston rod of the hydraulic cylinder in the whole process, ceramic chippings and dust generated in the detection process are prevented from being attached to the surface of the piston rod or entering the hydraulic cylinder, and the service life of equipment is prolonged.

A quick release locking connector system for fluid or mechanical systems. Systems of the inventive subject matter comprise a female connector with an assembly body, a release collar, a release collar spring, ball bearings, a locking collar, and a locking spring. The system also includes a male connector with an insertion end, a locking flare, and a visual locking indicator. The locking flare interacts with the locking collar upon insertion of the male connector into the female connector. The visual locking indicator is covered by the female connector upon insertion. The system provides a secure and reliable connection, reducing the risk of leaks and facilitating easy connection and disconnection of components.

The high-performance release agent production equipment comprises a reaction cavity shell and a temperature sensing probe, a sealing cover plate is fixed to the outer wall of the top of the reaction cavity shell through a hasp lock, and a gas path rotating connector is fixed to the axis position of the top of the sealing cover plate in a penetrating mode; a hollow stirring rod is rotationally mounted at the axis of the gas path rotating joint through a deep groove ball supporting bearing, and bionic elastic turbulent flow blades which are distributed at equal intervals are in threaded connection with the outer wall of the middle of the hollow stirring rod. Through cooperation of the storage bin, the spiral conveying blade and the first servo motor, the raw material conveying speed can be accurately adjusted, the situation of blockage or low efficiency is avoided, the second servo motor drives the grinding base to rotate at a high speed through meshing transmission of the first bevel gear and the second bevel gear, and the grinding efficiency is improved. An electric telescopic rod is matched to adjust a grinding disc to move left and right for further grinding, blocky raw materials can be fully crushed and ground, raw material particles are uniform and fine, and a good foundation is provided for subsequent reaction.

The utility model provides a high-rotating-speed fifth-shaft rotary table structure which comprises a shell, a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft. The main shaft is mounted on the four-point contact ball high-speed bearing; the driving motor is installed in the shell, a rotor of the driving motor is installed on the main shaft through a rotor connecting ring, and a stator of the driving motor is installed on the inner wall of the shell; a rear shaft is mounted at the tail part of the main shaft; an encoder rotor is mounted on the rear shaft, an encoder stator is arranged beside the encoder rotor, and the encoder stator is mounted on an encoder seat; and the encoder seat is also provided with a brake system. The high-rotating-speed fifth-axis rotary table structure is compact in structure, excellent in high-speed performance, high in sealing performance, fast in response, high in reliability and easy to maintain, can be widely applied to precision manufacturing equipment such as high-end numerical control machine tools and five-axis linkage machining centers, and has remarkable technical advantages and application prospects.

The invention discloses a critical current nondestructive testing device for a joint-free high-temperature superconducting tape. The critical current nondestructive testing device comprises a testing tape reel, a fixing plate, a testing tape reel motor rotating shaft, an air heater, a tension sensor, a wire guide wheel, a magnetizing device, a double-hole Hall sensor, a liquid nitrogen Dewar and the joint-free high-temperature superconducting tape. The test tape reel is used for placing the joint-free high-temperature superconducting tape; the testing tape reel motor rotating shaft is used for connecting the motor and the testing tape reel, and the air heater is used for blow-drying the tape to prevent the surface of the superconducting tape from freezing. The tension sensor is used for carrying out real-time and on-line monitoring on the tension applied to the superconducting tape. The wire guide wheel is of a bearing supporting structure and comprises a built-in deep groove ball bearing or sliding bearing. And the magnetizing device is used for magnetizing the high-temperature superconducting tape. The double-hole Hall sensor can detect magnetic field distribution on the surface of the magnetized strip. The double-hole Hall sensor is provided with a double-hole structure, and the slit strip is detected through the wire passing double holes.

A longitudinal adjustment device may have one rail arrangement and one drive device for the rail arrangement. The rail arrangement may have a first rail, and a second rail guided movably on the first rail. The drive device may have at least one motor, a gear unit supported in the second rail, a spindle with a spindle thread, and a spindle bearing. The gear unit may have a drive worm drivable by the motor, and a worm wheel, which is in operative connection with the worm teeth. The drive worm and the worm wheel are supported in a gear housing. The worm wheel is supported in the gear housing in an axially resilient manner and in the axial direction, on the one hand via an axial ball bearing and on the other hand via an axial bearing bush.

The invention belongs to the technical field of metal cutting machine tools, and discloses an intelligent lathe which is characterized in that a touch main screen is mounted on the front side of a spindle box, and a touch auxiliary screen is mounted on the front side of a carriage box; the carriage box is installed on the front face of the lathe bed through a Z-direction ball screw. A spindle is installed on the two side walls of the spindle box through a front support and a rear support respectively, the front support is mainly composed of a bidirectional thrust angular contact ball bearing and two rows of cylindrical roller bearings with taper holes in the inner walls, and the taper holes are matched with the outer conical face of one end of the spindle. Nuts A are arranged on the outer sides of the two rows of cylindrical roller bearings; nuts B are arranged on the inner sides of the two-way thrust angular contact ball bearings; the rear support is a double-row cylindrical roller bearing; the carriage box is provided with a large carriage, and the large carriage is provided with a small carriage through an X-direction ball screw; the small carriage is mounted on the large carriage through an X-direction linear guide rail; and the large carriage is arranged on the lathe bed through a Z-direction linear guide rail. According to the invention, the manufacturing process is simplified, the cost is reduced, the noise of a machine tool is reduced, oil leakage is avoided, and the device is easy to repair and use and moderate in price.

The utility model discloses a ball roller pre-tightening force torque dynamic detection device, which belongs to the technical field of bearing detection and comprises a detection table, a central through hole is arranged on the upper surface of the detection table, a positioning mechanism is mounted in the central through hole, a bearing body is arranged on the positioning mechanism, and an adaptive device is slidably clamped at the bottom of the detection table. A load assembly is installed on one side of the detection table, the adaptive device comprises a movable bottom plate, a lug plate is fixed to the bottom of one end of the movable bottom plate, a movable telescopic rod is fixed to the side wall of the lug plate, one end of the movable telescopic rod is fixed to the detection table, and a torque detection device is arranged on the movable bottom plate. The detection device can carry out adaptability detection on bearings with different inner diameters and outer diameters, the detection assembly is simple, the contact structure located in the bearing body can well stabilize the bearing body, dynamic detection can be carried out through the torque detection device, and the detection efficiency is improved. The load assembly on the outer side can apply uniform external pressure to the bearings with different outer diameters and drive the outer rings of the bearings to rotate.

This utility model discloses a bidirectional self-locking motor for a height-adjustable desk, including a front cover (1) and a rear cover (2). A stator (3) is provided between the front cover (1) and the rear cover (2). Multiple coils (4) are provided in the stator (3). A rotor (5) is provided inside the stator (3). Multiple permanent magnets (6) are provided on the outside of the rotor (5). A rotating shaft (7) is provided on the axis of the rotor (5). A first ball bearing (8) is provided between the rotating shaft (7) and the rear cover (2). A spring washer (9) and a friction plate (10) are provided in sequence on the rear side of the first ball bearing (8). A screw (11) is provided on the rear side of the friction plate (10). A screw groove is opened at the front end of the rotating shaft (7) to form a worm (12). A worm wheel (13) is provided on one side of the worm (12). The worm wheel (13) is connected to the front cover (1) through a bracket (14). This utility model has the advantages of convenient installation, low failure rate, low noise, and bidirectional self-locking function.

To provide a vehicle seat using an electrically driven longitudinal adjustment device having an integrated motor-gear unit.SOLUTION: The invention relates to a longitudinal adjustment device (110), comprising at least one rail arrangement (112) and a drive device (118) therefor, the rail arrangement (112) having a first rail and a second rail guided movably on the first rail, the drive device (118) having at least one motor (118.1), a gear unit (118.2) supported in the second rail, a spindle with a spindle thread, and a spindle bearing, the gear unit (118.2) having a drive worm and a worm wheel, the spindle being of fixed design and being supported in the spindle bearing and connected to the first rail, and the worm wheel being supported in the gear housing, on the one hand via an axial ball bearing and on the other hand via an axial bearing bush, in an axially resilient manner in the axial direction.SELECTED DRAWING: Figure 2

The invention provides a transmission and an all-terrain vehicle adopting the transmission. A driving bevel gear and a gear shaft of the transmission have good connection stability. The transmission includes a housing, an output shaft assembly, and a bearing pack. The housing includes a housing body and an end cap. A matching cavity is defined by the shell body and the end cover. The shell body is provided with a communication port for communicating the matching cavity and the containing cavity. The output shaft assembly comprises a gear shaft, a transmission gear and a driving bevel gear. The gear shaft penetrates through the communication opening of the shell body. The first end of the gear shaft is located in the containing cavity. And the transmission gear and the driving bevel gear sleeve the gear shaft. The bearing set comprises a first ball bearing, a second ball bearing and a thrust bearing. The first ball bearing is located at the first end, and the gear shaft abuts against the shell body in the second axial direction through the first ball bearing. The second ball bearing is located at the communication port. The thrust bearing is located at the second end, and the gear shaft abuts against the end cover in the first axial direction through the thrust bearing.

The invention provides continuous wastewater treatment equipment, which belongs to the technical field of wastewater treatment, and comprises a treatment tank and an observation window arranged in the middle of the treatment tank, and further comprises a multi-stage treatment assembly, a pollution discharge purification assembly and a stripping assembly, deep purification of the wastewater is realized through multi-stage treatment; the vertical spraying is combined with the stirring of the fan blades and the scrapers, strong water flow scouring force is formed above the elastic filter plate, meanwhile, the convex plates periodically extrude the elastic filter plate during rotation to enable the elastic filter plate to vibrate, suspended particles and impurities can be effectively prevented from being accumulated on the surface of the elastic filter plate, the risk of filter plate blockage is reduced, and meanwhile, the service life of the filter plate is prolonged. Ferric hydroxide colloid generated by ferrite reaction can more uniformly adsorb suspended particles under the driving of upper and lower water flows, and the precipitation separation of the suspended particles is accelerated; the connecting shaft rotates to drive the mounting cylinder, the arc-shaped groove of the trigger cavity is matched with the ball, the oxidation disc vibrates, the vibration strength is adjusted according to the descending amplitude of the oxidation disc, and the overall wastewater treatment efficiency is improved.