1510 results about "Free rotation" patented technology

The utility model belongs to the technical field of welding equipment, and discloses a pipeline welding equipment, including a base frame, a supporting device, a lifting chuck device and a welding device, wherein the base frame is provided with supporting rails along its length direction; a plurality of supporting devices are slidably arranged on the supporting rails, and are used to support the horizontal pipeline workpiece, and the pipeline workpiece can rotate freely on the supporting device; the lifting chuck device is arranged on the base frame and located at one end of the supporting rail, and is used to clamp the end of the pipeline workpiece and drive the pipeline workpiece to rotate a set angle, and the clamping height of the lifting chuck device is adjustable; the welding device includes a mobile platform slidably arranged on the supporting rail, and a welding operation assembly is arranged on the mobile platform, and the welding operation assembly is used to extend into the pipeline workpiece and weld the inner wall of the pipeline workpiece. The pipeline welding equipment can be applied to pipeline workpieces of multiple sizes, reduces the welding difficulty, improves the welding efficiency, and ensures the welding quality.

The present disclosure discloses a valve with dual ball valves, including two ball valves arranged side by side and clamped with each other, wherein each ball valve includes a valve body, a ball body, a valve rod and a handle, clamping structures are respectively and correspondingly arranged on one surfaces of the two valve bodies abutting against each other, and each ball valve further includes a limiting seat, a first anti-misoperation device and a second anti-misoperation device. The first anti-misoperation devices ensure that the handles can be rotated freely only when the two ball valves are in a clamped state. The second anti-misoperation devices ensure that the handles can only be rotated when external force is applied to the handles. Misoperation on the valve is prevented through triple protection.

A wire puller handle that is without a handle and can be placed flat, and the wire puller includes a take-up wheel, a roller, a fixing frame and a spring tube. The take-up wheel is provided with a winding area inside to accommodate a pull cord, one side of the take-up wheel is connected to a concave frame with an accommodation portion, and the other side is provided with a hollow portion. An inner edge of the take-up wheel is provided for fixing one end of the pull cord. The roller is disposed in the accommodation portion and forms free rotation between the roller and the take-up wheel. One side of the fixing frame is fixed to the roller so that the take-up wheel is capable of being placed flat. One end of the spring tube is fixed to the fixing frame.

An archery cam adjustment assembly for an archery bow includes an axle extending along an axis from a first end to an opposing second end and structured to traverse a limb of an archery bow. The axle further includes a central portion defining a plurality of threads. A cam support is structured to support a cam and to engage the central portion of the axle. A securing member is structured to be moved between a locked and an unlocked state. In the unlocked state, the axle is enabled to rotate freely relative to the cam support to move the cam support along the axis and displace the cam in a lateral direction with respect to the limb. In the locked state, the axle is inhibited from rotating relative to the cam support and the cam support is inhibited from moving along the axis.

In a compound bow, an axle, having threaded ends, is pushed through a hole in a cam. Cam spacers, having internal threads, are screwed onto the ends of the axle until the ends of the cam spacers abut the cam. The cam can rotate freely around the unthreaded middle portion of the axle. The ends of the cam spacers go into holes in limb brackets attached to the bow's resilient limb ends. In one embodiment, the ends of the cams are threaded, and a nut is tightened over the thread to shift the cam spacers and cam left or right relative to the limb brackets. In another embodiment, the cam spacers and limb brackets are threaded, and turning the cam spacer shifts the cam left or right. In both embodiments, the cam position is precisely adjusted and very stable.

The invention relates to the technical field of laser cutting, and discloses an automatic rotating type laser cutting device which comprises a base plate, a workpiece containing disc, a movement adjusting mechanism and a workpiece pressing mechanism, a supporting structure for supporting the ground is arranged below the base plate, and supporting plates are fixedly arranged at the front end and the rear end of the upper portion of the base plate; a supporting frame transverse rod is installed above the supporting plate, angle rods are arranged at the two side ends of the supporting frame transverse rod, a longitudinal supporting plate is installed between the angle rods, a supporting frame longitudinal rod is arranged at the outer end of the longitudinal supporting plate, and the movement adjusting mechanism comprises a longitudinal movement adjusting structure, a transverse movement adjusting structure and a laser cutting mechanism. The workpiece containing disc is of a disc-shaped structure and is rotationally arranged in the middle of the upper portion of the base plate. The workpiece pressing mechanisms are symmetrically and fixedly arranged at the two ends of the upper portion of the base plate. According to the laser cutting device, a workpiece can freely rotate by 360 degrees in the horizontal direction, the workpiece can accurately rotate to a specified angle according to the cutting requirement in the laser cutting process, and the cutting flexibility and efficiency are greatly improved.

A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

A conveyor device for use in a cutting unit of an agricultural harvester. The conveyor device includes a frame and at least one conveyor belt which revolves endlessly around two rollers arranged parallel to one another. A distance between the two rollers may be adjusted using a tensioning device. A first roller may be rotatably driven, and a second roller may be mounted to revolve freely. A device for rotational speed detection (associated with the first roller) is configured to detect a rotational speed of the first roller. Further, a second device (associated with the second roller) detect the rotational speed of the second roller during operation of the conveyor belt.

A trailer jack and transport system providing improved rolling and steerable motion to sport, recreational and utility trailers, when operating on diverse kinds of ground surfaces, including pavement, dirt, sand, and mud, without use of caster-style wheels. The trailer jack and transport system employs a spherical load-bearing transport ball supported within a frame assembly and configured to allow the spherical wheel to freely rotate in any orientation, on ground surfaces of a diverse nature during system operation.

The invention refers to an eccentric element (10) configured for use in a hand-held power tool comprising a tool motor for driving a tool shaft (16), in particular for use in an orbital sanding or polishing machine. The eccentric element (10) comprises: an eccentric part (12) with a top surface (18) attachable to a distal end (22) of the tool shaft (16) or forming an integral part therewith so as to transmit a torque from the tool shaft (16) to the eccentric element (10) and to rotate the eccentric part (12) about a first rotational axis (28) upon activation of the tool motor, a bottom surface (32) to which a working element (30) of the power tool is releasably attachable in a manner freely rotatable about a second rotational axis (34), and a counterweight part (14) attached to the eccentric part (12). The eccentric part (12) and the counterweight part (14) are separate components and formed such that they enter into a mutual interlocking relationship upon attachment of the counterweight part (14) to the eccentric part (12), the interlocking relationship acting in at least one direction (76; 82; 86).(FIG. 3)

The invention discloses a cushion block for realizing differential pushing of a curved bridge of a common walking jack, which comprises a first cushion block and a second cushion block, the first cushion block and the second cushion block are respectively arranged on the walking jack on the inner side and the outer side of the bottom surface of a main beam of the curved bridge, and the first cushion block comprises a first bearing plate; the first bearing plate is placed in the sliding block and can rotate freely. The sliding block is placed in the base, can horizontally move in any direction in the horizontal plane and can automatically reset, the position of the sliding block is adjusted through the crank, and the differential distance in the differential pushing process is achieved. The second cushion block comprises a second bearing plate and a sleeve, the second bearing plate is placed in the sleeve, the structure of the second bearing plate is the same as that of the first bearing plate, and the second bearing plate can rotate freely. The bent bridge differential pushing device can adapt to beam body rotation, transverse displacement and longitudinal differential displacement in the differential pushing process, bent bridge differential pushing can be achieved through an oil pump control system of a common walking type jack, and the ideal state that deviation rectification is almost not needed theoretically is achieved.

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

A wire puller handle for easily changing wires includes a main frame, a take-up wheel, a plurality of fasteners, and a spring tube. The main frame includes a stand, a handle, a fixing shaft, and a fixing bracket. The take-up wheel includes a first half-wheel frame and a second half-wheel frame. A winding area is defined between the first half-wheel frame and the second half-wheel frame for accommodating a pull wire, and the take-up wheel performs free rotation by sleeving the sleeve on the fixing shaft. The plurality of fasteners are respectively fixed to the first half-wheel frame and the second half-wheel frame. The spring tube is passed and fixed to the fixing bracket at one end; the other end thereof is provided for the other end of the pull wire being sent out or retracted when the take-up wheel is in free rotation.

The invention discloses a mechanical connection technology of deep sea communication equipment, and aims to provide a load-bearing hinge for a flat cable and a manufacturing method thereof, and the key points of the technical scheme are that the load-bearing hinge comprises a hinge main body which is formed by fixing two stainless steel 316L metal plates through screws and ensures the strength and corrosion resistance of the structure; the hinge interface is arranged at the front end of the hinge main body, plays a role in bearing, is used for being connected with underwater communication equipment and ensuring the stability and the reliability of connection, and can be stably rotated and fixed in the use process; the connecting piece is fixed between the underwater communication equipment interface and the hinge interface to form a rotatable joint structure, so that the hinge can freely rotate within a certain range to meet operation requirements in different working environments; the glue pouring sleeve is arranged in the middle of the hinge main body and is used for pouring and sealing an aramid rope for bearing a cable into the cavity through the force bearing glue; a bearing block; a vulcanization bag; the invention is suitable for the technical field of mechanical connection of deep sea communication equipment.

An engine system can comprise an engine and a cooling module assembly which comprises a radiator. In some examples, an assembly, such as the cooling module assembly, can include a radiator and a fan shroud and screen assembly arranged at a rear side of the radiator. The fan shroud and screen assembly includes a screen and first and second shroud portions coupled to and around the screen, where the first and second shroud portions and the screen form a cavity, and where the first and second shroud portions are directly coupled to the rear side of the radiator. The assembly further comprises a fan disposed within the cavity and configured to spin freely within the cavity without being attached to the fan shroud and screen assembly.

A hybrid transmission system with a multi-speed gearbox. The multi-speed gearbox is configured to rotationally couple a prime mover and an electric machine to different gear ratios during a hybrid drive mode. The multi-speed gearbox includes an electric drive interface gear positioned coaxial to a first primary shaft and a second primary shaft and idly mounted, free to spin, to the second primary shaft and an output shaft that includes an output shaft gear which is fixedly coupled thereto meshes with a gear on a secondary shaft.

Adjustable handle assemblies as well as rolling assemblies incorporating the same are provided. The handle assemblies include a push button, a spring-loaded gear, a handle, and a base member, allowing for dynamic adjustment between released and locked positions. Actuation of the push button enables free rotation of the handle or secure locking at a predetermined angle, providing users with ergonomic comfort and stability during transportation. The rolling assembly further includes a robust frame structure, multiple wheel assemblies, and optional telescoping members, accommodating various transportation needs. Embodiments of the invention offer a comprehensive solution for urban commuters, travelers, and household users, combining ergonomic design, intuitive controls, and compact portability for seamless transportation of objects in diverse environments.

A motion simulator system is disclosed that includes a freely rotatable movable frame supported by, but unattached to, a hemispherical base. The movable frame comprises a spherical enclosure constructed from rigid, lightweight materials such as composite materials or interlocking panels, providing unlimited 360-degree rotation in all three rotational degrees of freedom (pitch, roll, and yaw). An internal actuator system coupled to the movable frame controls attitude positioning while the center of rotation remains substantially fixed relative to the base. Low friction engagement between the movable frame and base is achieved through transfer bearings integrated into the base's outer surface or by pressure-vented air cushions. The system enables smooth, continuous rotation of the untethered movable frame for enhanced motion simulation applications.

The utility model discloses a diaphragm valve which comprises a valve body, a cover body, a diaphragm, a driving assembly and a pressing block. A non-return piece is integrally arranged on the valve main body and extends upwards on the outer side of the neck part; a limiting bulge is arranged on the skirt part; wherein the non-return piece and / or the limiting protrusion are / is provided with a guide face facilitating movement of the cover body in the locking direction, and when the cover body is combined with the valve body and locked, the diaphragm abuts against the valve body. The limiting protrusion is connected to the non-return piece in a clamped mode so as to limit the cover body to move in the unlocking direction. The non-return piece and the valve main body are integrally arranged, the situation that the non-return piece and the valve main body are not installed in place, and therefore free reverse rotation of the cover body cannot be blocked is avoided, the non-return piece is arranged to be of an upward extending structure, the non-return piece is made to deform more easily, and when the cover body is rotated to enable the cover body and the valve main body to be locked or unlocked, the non-return piece is not prone to deformation. The non-return piece can deform towards the space between the non-return piece and the valve body, and the problem that the whole valve body is replaced due to the fact that the non-return piece is broken is avoided.

The invention relates to a device (1) for handling a drum and for unwinding a material wound onto the drum, wherein the handling device (1) comprises a rigid frame (2) comprising two side members (3) held at a distance from each other, and in which: - each side member (3) supports a wheel (4); - each wheel (4) is mounted, independently of the other wheel (4), so as to be free to rotate relative to the frame (2) about an axis (11) of rotation common to both wheels (4) and orthogonal to the side members (3); - each side member (3) is provided with a suspension member (5) arranged so as to be able to be fitted into an axial opening of the drum, wherein the suspension members (5) are suitable for being able to hold the drum at a distance from the ground so as to allow the drum to rotate on itself according to the axis of symmetry of the drum and to unwind the material wound onto the drum.

Filtering pullies with a hub adapted to be fixed to a rotating shaft, a crown mounted coaxially and rotationally free on the hub, at least one elastic group arranged circumferentially with respect to the hub and the crown and interposed, each, between a pair of first elements integral with the hub and between a pair of second elements integral with the crown are disclosed. The pulley has a dust protection lip carried integrally by said hub and configured to slide, in tight manner, with respect to an element integral with said crown. The dust protection lip is a labyrinthine sealing lip.

The utility model discloses stainless steel pipe cutting equipment with an automatic feeding function, which belongs to the field of stainless steel pipe production and comprises a rotating device, a clamping device and a driving device. The rotating device can freely rotate around an axis in a space; the clamping device can be matched with and clamp a pipe fitting to be cut; the clamping device is fixedly connected with the rotating device and can drive the clamped pipe fitting to rotate along with the rotating device; the driving device is rotationally connected with the rotating device so as to provide driving force; the rotation device is composed of a plurality of same rotation units, and all the rotation units are coaxially arranged and can freely rotate around the same axis; the pipe fitting cutting device can automatically convey pipe fittings for cutting machining, and guarantees smooth and tidy cutting faces of laser cutting through the rotating mechanism.

A system for a robotic finger may include a base coupled with a robotic finger having a plurality of joints and an actuation system that actuates the plurality of joints. The actuation system may include a first actuator that drives a connection coupled with a first joint of the plurality of joints. Driving the connection can cause a first rotation of the robotic finger about a first axis. The actuation system may also include a second actuator that drives a cylinder coupled with the first joint. Driving the cylinder can cause a second rotation of the robotic finger about a second axis. The cylinder can rotate freely about the first axis to enable the first rotation. Other aspects are also described and claimed.

Systems and methods are provided for recovery of a first vehicle that travels on a suspended track disposed at an elevated position within a facility. The systems include the suspended track, the first vehicle configured to travel along the suspended track, and an emergency wheel assembly configured to replace a first wheel assembly on the first vehicle while the first vehicle remains on the suspended track, the emergency wheel assembly including a wheel configured to freely rotate on an axle of the first vehicle. In some examples, the systems may include a second vehicle configured to travel along the suspended track, a coupling device configured to couple the first vehicle to the second vehicle, and a controller configured to operate the second vehicle to move along the suspended track while coupled to the first vehicle with the coupling device and thereby tow the first vehicle.

A crossbow crank can comprise a drive shaft selectively coupled to a one-way bearing that allows rotation of the drive shaft and an associated spool in a first direction, and impairs rotation of the drive shaft and the spool in a second direction. The drive shaft can be automatically locked and unlocked relative to the one-way bearing, allowing the bearing to control operation of the drive shaft, via a brake. The brake can be axially compressible along the drive shaft to automatically lock the drive shaft and a sleeve so they are fixed relative to one another and rotate in unison when the drive shaft is rotated in the first direction. The brake can be deactivated by operation of a crank so that the drive shaft can rotate freely relative to the sleeve and thus the bearing in a second direction. A related method of use is provided.

The utility model relates to the technical field of transmission, in particular to an electric driving system provided with a one-way bearing, which specifically comprises a box body, a first planetary gear train, a second planetary gear train, a first motor, a first motor shaft, a second motor, a second motor shaft, a fifth transmission wheel, an output wheel and a pedal shaft, at least one second planet shaft is connected with a fifth transmission wheel; the output wheel is in transmission fit with the fifth transmission wheel through the second transmission wheel; a third transmission wheel on the pedal shaft is in transmission fit with the gear ring; a second motor shaft of the second motor is arranged on the box body through a second bearing; the second bearing is a one-way bearing, so that the second motor shaft can only freely rotate in a preset direction; the third transmission wheel is sleeved on the pedal shaft through a first bearing; the first bearing is a one-way bearing so that torque can be input from the pedal shaft in a one-way mode. In this way, stepless speed change adjustment can be achieved through double-motor regulation and control, the overall structure is simple, and cost is lower.

The invention discloses a multi-purpose loading test device and method for a large-span bridge cable system substructure, and relates to the technical field of bridge cable loading tests. The test device comprises a cable system stress loading system, a cross beam electric lifting locking system and a roller bearing transmission system, wherein the cable system stress loading system comprises a cable system self-balancing reaction frame, a free rotation force boundary subsystem, a free rotation anchoring subsystem and a sling force loading anchoring subsystem. Through physical designs such as self-balancing reaction frames, composite anchor rings and variable cross-section force transmission of the cable system, the force transmission path and the stress capacity of the reaction frames are optimized, the loading capacity of the whole loading system is increased to thousands of tons, and the loading diameter breaks through 500 mm; meanwhile, the free rotation force boundary subsystem and the free rotation anchoring subsystem can freely rotate in the sliding cross beam, and hovering tensioning at any angle can be achieved when the cable substructure is loaded in cooperation with free sliding of the sliding cross beam.

The present invention relates to the technical field of automatic mahjong machines, and specifically discloses a stacking, pushing, and lifting integrated structure and a mahjong machine, which at least include a driving motor, a stacking structure, a pushing structure, and a lifting structure. Two one-way bearings arranged side by side are provided on the output shaft of the driving motor, and the free rotation directions of the two one-way bearings are opposite; the stacking structure is connected to the driving motor through a first transmission mechanism, the pushing structure is connected to the driving motor through a second transmission mechanism, and the lifting structure is driven by a third transmission mechanism and connected to the driving motor. In the above structure, the stacking structure, the pushing structure, and the lifting structure are driven by the same driving motor, reducing the number of motors. For the overall mahjong machine, since there are four groups of stacking structures, pushing structures, and lifting structures respectively, it is equivalent to reducing eight motors, reducing the costs of the motors and circuit control, and making the system more stable with lower failure rates.

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.