1663 results about "Rotational joint" patented technology

In some embodiments, a device mount may include a base, an arm coupled to the base, a connector coupled to the arm with a rotation joint, a first motor disposed within the base and configured to tilt the connector, facilitated by the rotation joint, and a second motor disposed within the base and configured to rotate the base. In some embodiments, a method may include receiving an indication that a device is coupled to a connector of a device mount, receiving a first signal from the device to move the device mount to track a user or an object in view of one or more of the device's cameras, and in response to the first signal, either actuating a first motor to tilt the connector or actuating a second motor to rotate a base of the device mount to track the user or the object.

A modular electric wheel assembly. The assembly including a motor with a rotor in a rotary union with a stator. The motor of the brushless DC type and including a circular rotor rotating about a central axis and including a central hollow axle. The hollow axle configured for coupling with a removable energy source and / or an external energy source and including attachment structures for a plurality of attachments to enable riding by a user or configuration within a parent vehicle such as a bicycle or moped, or use as another machine type, such as a power tool or power generation machine. The rotor configured with a quick-change mechanism through a first ring configured to accept a plurality of removable wheel types and rotatable attachments, enabling a user to select a variety of unique wheel / tire types and configurations for a variety of applications.

The invention discloses an irrigation sprayer for planting dendrobium officinale, and relates to the technical field of sprayers. The device comprises a supporting frame, a plurality of rollers are rotatably connected to the bottom of the supporting frame, a mounting frame is fixedly mounted on the supporting frame, a water supply assembly and a plurality of sliding sleeves are fixedly mounted on the mounting frame, the sliding sleeves are slidably arranged on the mounting frame in a sleeving mode, threaded holes are formed in the sliding sleeves in a penetrating mode, and threaded rods are in threaded connection with the threaded holes; the first ends of pipelines are fixedly installed on the multiple sliding sleeves, the first ends of the pipelines are rotationally connected with atomizing nozzles through rotating joints, and the second ends of the multiple pipelines communicate with a water outlet of the water pump. The sliding sleeve is fixed to the mounting frame through the threaded rod and the threaded hole, then the distribution distance and layout of the atomizing nozzles are flexibly changed, the rotating joint allows the nozzles to rotate within a certain angle, and the spraying direction can be adjusted according to actual needs while it is ensured that water flow is smooth.

The utility model discloses a special rotary joint for an ultralow-temperature fluid loading and unloading arm, and relates to the technical field of rotary joints. The connector comprises a connector body, a first flange plate is arranged at the top of the connector body, a second flange plate is arranged above the first flange plate, a plurality of mounting holes are formed in the first flange plate and the second flange plate, and mounting assemblies are arranged in the mounting holes in the second flange plate. And a driving mechanism is arranged in an inner cavity of the mounting assembly. When dismounting is needed, the driving mechanism is rotated reversely, thrust to the balls is reduced, the mounting holes in the first flange plate are obliquely arranged, the balls can retract, and then the tight connection state of the first flange plate and the second flange plate is relieved, so that tedious operation of traditional flange connection is avoided, and the dismounting efficiency is improved. The connecting and detaching efficiency of the loading and unloading arm and the external pipe is improved, time and labor cost is reduced, and convenience and reliability of the loading and unloading system are improved.

A medical pad for exchanging thermal energy between a targeted temperature management (TTM) fluid and a patient is disclosed. The pad can include a fluid containing layer and a fluid conduit attached therewith via rotatable joint where the joint is configured to facilitate rotation of the fluid conduit with respect to the pad. A method of manufacturing the pad can include coupling a first member of the rotatable joint to a fluid delivery line, coupling the second member to the fluid containing layer, and inserting the first member within an opening of the second member to facilitate a snap-fit retention mechanism between first member and the second member. A method of using the pad can include rotating the fluid delivery line relative to the thermal pad via the rotatable joint when initially applying the pad to the patient or when adjusting an orientation of the pad on the patient.

The invention discloses an efficient chip removal and cooling device for a drill bit, and relates to the field of drilling tools. An efficient chip removal and cooling device for a drill bit comprises a mounting frame, and further comprises a sliding frame, a chip removal device and a cooling device, the mounting plate is connected to the sliding frame in a lifting mode, a rotating sleeve is rotationally connected to the mounting plate, a drill bit is detachably connected to the rotating sleeve, and a chip groove is formed in the outer wall of the drill bit; according to the drill bit, the spiral chip removal groove in the outer wall of the drill bit is matched with the cooling liquid obliquely and upwards sprayed out of the liquid spraying holes, the cooling liquid generates upward scouring force on cuttings, the chip removal capacity is greatly improved, cuttings are effectively prevented from being blocked, and the chip removal efficiency and the drilling quality are improved; cooling liquid enters the spiral cooling cavity through the liquid supply pump via the liquid conveying pipe and the rotary connector, the contact area of the cooling liquid and the drill bit is increased, the retention time of the cooling liquid and the drill bit is prolonged, the cooling effect is remarkably improved, the temperature of a drill lip is reduced, and the service life of the drill bit is prolonged.

The utility model discloses a rotary hinge device for installing a solar panel. The rotary hinge device comprises a hinge body and a panel fixer, hinge tables are arranged at the two ends of the hinge body, connecting tables are arranged at the two ends of the sailboard fixing device, the hinge tables and the connecting tables are connected through rotating joints, so that the sailboard fixing device can rotate around the hinge tables, and the rotating joints are sleeved with hinge torsion springs matched with the hinge tables and the connecting tables. The outer end of one rotary connector is further provided with a time sequence torsion spring arranged in the axial direction of the rotary connector. When the solar panel support is used, the solar panel support is fixedly installed on the side face of a satellite structure frame and can be reliably connected with a sailboard. And meanwhile, the rotary joint for rotationally connecting the sailboard is arranged in the hinge main body, so that the flexible rotary connection between the sailboard and the satellite body is realized, and the secondary unfolding requirement of the sailboard is met. A time sequence control structure is further arranged in the hinge to prevent interference and collision in the unfolding process, and the phenomenon of over-unfolding or under-unfolding is prevented.

The invention discloses a blade system of a wind generating set, and belongs to the field of wind power generation systems. A hydraulic system drives a coaxial gear rigidly connected with the root of a main blade to provide power for a gear pump, hydraulic oil flow and speed are controlled by a hydraulic control element, and the hydraulic oil penetrates through the center of a main shaft through a double-channel rotary joint and reaches a blade motor at the top end of the main blade through an oil way laid on the inner surface of the main blade; and the blade motor drives the secondary blade module to rotate to form closed-loop energy supply. At low wind speed, the secondary blade module and the main blade rotate in the same direction, so that the aerodynamic efficiency is enhanced; at high wind speed, the secondary blade module and the main blade rotate reversely, reverse lift force is generated, and the tip bending moment of the blade is reduced. The core of the invention lies in that pneumatic coupling and hydraulic supply technologies are combined, so that not only is the application range of equipment to wind speed change widened, but also the utilization rate of wind energy is obviously improved. Revolutionary progress is brought to the field of wind power generation, and wide application prospects and market potential are shown.

An example includes a device having a base platform, a seat platform, and a swivel joint. The base platform is configured for affixation to an occupant seat of a motor vehicle. The base platform has a first and second base retainer component. The seat platform has a seat portion and a back portion. The seat platform has a first and a second seat retainer complement. The swivel joint couples the base platform and the seat platform and permits relative motion of the base platform and the seat platform about a rotary axis and constrain motion on other axes. At a first position of the base platform relative to the seat platform, the first seat retainer complement aligns with the first base retainer component. At a second position of the base platform relative to the seat platform (second position different than the first position), the second seat retainer complement aligns with the second base retainer component.

The utility model discloses softening and hardness-removing treatment equipment for high-concentration brine. The softening and hardness-removing treatment equipment comprises a treatment barrel, a rotating rod and a stirring blade mounting sleeve, a support is fixedly welded to the upper portion of the rear wall of the treatment barrel, a servo motor is fixedly installed at the position, located at the circle center over the treatment barrel, of the top of the support, a rotating rod is fixedly installed on an output shaft at the bottom of the servo motor, spraying pipes are fixedly installed on the two sides above the rotating rod, and a rotating connector is installed at the position, connected with the output shaft of the servo motor, of the top of the rotating rod. A stirring blade mounting sleeve movably sleeves the lower part of the rotating rod, stirring blades are fixedly welded on the periphery of the stirring blade mounting sleeve, guide rods are fixedly mounted at the outer ends of one group of stirring blades, and a spiral guide groove is formed in the inner wall of the treatment cylinder. According to the utility model, a medicament can be uniformly sprayed into high-concentration brine, and multi-dimensional stirring is realized by virtue of a unique stirring blade design, so that the brine and the medicament are fully mixed and reacted to complete softening and hardness removal treatment, and thus efficient mixing is realized and a good treatment effect is ensured.

The invention belongs to the related technical field of part finish machining, and particularly discloses a shaft part machining device which comprises a base, a spindle box is arranged on one side of the upper end face of the base, hydraulic calipers are installed at the end of the spindle box, and a turning frame is arranged on the upper end face of the base and located on one side of the spindle box. A sliding seat is connected to one side of the turning frame through an arranged X-axis driving sliding rail mechanism, a double-axis adjusting seat is arranged at the upper end of the sliding seat, an installing seat is fixedly connected to the upper portion of the double-axis adjusting seat, a tool rest is connected to the upper end face of the installing seat through an arranged installing block, and a tailstock is fixedly installed above one end of the turning frame. A tool block is installed in the tool rest, the outer wall of one side of the tool rest is connected with a rotating joint through an arranged transmission mechanism, and a negative pressure pump is arranged on the outer wall of the tool rest and located at the rotating joint. The problems of resonance and long cuttings in the turning process of the slender shaft are effectively solved, and the machining quality and efficiency of shaft parts are improved.

The utility model discloses a right-angle bidirectional rotary joint, and relates to the technical field of adjustable connection. A right-angle bidirectional rotating joint comprises a right-angle connecting pipe, mounting pipes are fixedly connected to the two sides of the right-angle connecting pipe, a liquid injection assembly is located on the corresponding mounting pipe and comprises a liquid injection pipe, a sealing plug, a telescopic sleeve, four fixing rods and a spring, and the liquid injection pipe is fixedly connected to the corresponding mounting pipe; a liquid injection hole is formed in the portion, close to the liquid injection pipe, of the mounting pipe, and through cooperation of the liquid injection pipe, the spring, the sealing plug, the four fixing rods and the telescopic sleeve, lubricating oil can be injected only by pressing the sealing plug downwards, so that the lubricating oil can be discharged into the positioning groove from the liquid injection pipe, and therefore the rotating ball in the positioning groove can be lubricated conveniently; and the sealing plug can be automatically reset under the support of the spring, so that the liquid injection pipe can be conveniently sealed, the lubricating oil can be conveniently and quickly injected, and the convenience and the high efficiency of the lubricating oil during injection are further improved.

The utility model provides an anti-rust spraying device which relates to the technical field of anti-rust spraying and comprises a bottom frame and a barrel body, the top of the bottom frame is fixedly connected with a bottom plate, the bottom of the bottom plate is fixedly connected with a motor, the output end of the motor penetrates through the bottom plate and extends to the upper side, and the bottom of the bottom plate is fixedly connected with a vacuum pump. The output end of the vacuum pump is fixedly connected with a vacuum pipe; and the rotating assembly is rotationally connected to the top of the bottom plate, and the rotating assembly comprises a rotating joint. According to the utility model, when the barrel body is subjected to rust-proof spraying treatment, the barrel body is driven to rotate along with the rotation of the communicating seat, and under the rotation of the barrel body, the inner wall and the outer wall of the barrel body are uniformly covered and sprayed with a coating sprayed by the spray head, so that the synchronous rust-proof coating spraying treatment on the inner wall and the outer wall of the barrel body is completed; and the processing flow of rust-proof spraying is simplified, and the processing efficiency is effectively improved.

A sheet material handling equipment includes a handling fixture having a frame adapted for attachment to a robot or manipulator; at least two arms anchored to the frame, each arm being formed by at least two semi-arms pivotally connected to each other and including a gripping member at its free end, the pivotal connection including a rotatable joint with a joint coupling having a joint brake, which are passive with a pressure or electric lock; and a first control line for distributing electrical power, and / or air, and / or hydraulic fluid for controlling the joint and / or the gripping member connected via an adapter to (a) an electrical power supply, and / or hydraulic fluid, and / or air to the robot or manipulator and to (b) a work line control unit, and an adjusting fixture structured to actively adjust a position of at least one of the arms and / or to unlock the joint brake.

A rotary joint capable of measuring a rotation angle with high accuracy includes: a flange; a rotor whose one end is connected with the flange and has a tubular shape; a shaft whose outer periphery is connected with an inner periphery of the rotor so that the shaft is rotatable about a central axis of the rotor as a rotation axis; and a rod whose one end is connected with the flange and is provided in an opening to extend from one end side of the shaft along the central axis; an angle measurement unit connected with the opening to extend from another end side of the shaft to another end of the rod and measures a rotation angle between the rod and the shaft with the central axis as the rotation axis; and a shield member formed in a cup shape.

Rotatable joints may include one or more braking assemblies. The one or more braking assemblies may control a degree of movement of the rotatable joint to provide a range of damping. In some instances, the braking assemblies may include brake band(s) that tighten and loosen around a hub, or other rotatable member of the rotatable joint. The amount of braking, or tautness of the brake band(s), may be variably controlled to arrest the hub by different amounts. In some instances, the tightening of the brake band(s) around the hub may be controlled using linear actuator(s) and / or magnetic element(s). Implementing braking assemblies having controlled actuation may improve control of rotatable joints without adding cost, complexity, weight, or bulk.

The utility model relates to the technical field of automobile steering wheels, and discloses a bilateral wiring type automobile steering wheel. Comprising a wiring type steering wheel, an operation board is fixedly connected to the inner wall of the wiring type steering wheel, a center console is fixedly connected to the end, away from the wiring type steering wheel, of the operation board, and a steering column is rotationally connected to the lower end of the center console. According to the wiring type steering wheel, the rotating joint rotationally connected with the lower end of the steering column is rotationally connected with an automobile, so that when the wiring type steering wheel is rotated, the steering column below the wiring type steering wheel is driven to rotate, the sliding ring is driven to rotate in the sliding ring due to rotation of the steering column, and meanwhile the inner wall of the sliding ring is rotationally connected with the rotating ring; in this way, the rotating joint makes contact with the rotating bearing in the rotating ring while rotating, so that the rotating bearing is driven to rotate together, the rotating process is more convenient, and meanwhile the rotating capacity of the rotating joint is improved.

The utility model discloses a fire-fighting reel capable of adjusting belt releasing speed, which comprises a roller and a suspension support, the suspension support is fixedly connected with a rotary joint, the rotary end of the rotary joint is fixedly sleeved with the roller, and a fire-fighting water belt is wound on the roller. Then the elastic force of the spring is changed, so that the extrusion force of the limiting block on the fire hose can be adjusted, the magnitude of the force required for pulling the fire hose is changed, the release speed of the fire hose can be changed under the action of the same pulling force, and similarly, the release speed of the fire hose can be changed by adjusting the extrusion force of the limiting block on the fire hose; under the condition that the fire hose is pulled out at the same speed, more labor can be saved, when the fire hose is not used, the extrusion force of the limiting block on the fire hose is increased, water in the fire hose can be extruded out and the water outlet end of the fire hose can be fixed when the fire hose is taken up, and a child is prevented from pulling the fire hose to play with the fire hose.

The invention discloses an electro-hydraulic control underground adjustable angle device and an adjusting method thereof. A translation assembly and a rotating assembly in a shell assembly are sequentially arranged from outside to inside, a sliding sleeve of the translation assembly slides in the axial direction of a shell of the shell assembly, and a spiral rod of the rotating assembly is matched with the sliding sleeve through a spiral key to achieve rotating movement and axial movement of the spiral rod; the lower end of the rotating assembly is meshed with the rotating joint assembly through a spherical gear to realize rotation of a rotating joint; the lower end of the shell is connected with the rotary connector through a gear ring, and the included angle between the axis of the gear ring and the vertical axis of the shell is larger than 0 degree. The device has the advantages of being simple in structure, convenient to operate, reliable in performance and high in structure bending angle adjustment control precision; the bend angle is adjusted underground, the requirement for track control of a well with a complex structure is met, and the purpose of completing drilling track control of the well with the complex structure with low cost, high efficiency and high precision is achieved.

The invention discloses an alloy pipe vacuum rotating friction plug welding device and welding method.The device comprises a shell which is installed on the periphery of a heat insulation pipe inner pipe and a heat insulation pipe outer pipe which are in a concentric sleeving state and provided with an inner cavity, a sealed space is formed between the shell and the heat insulation pipe outer pipe, and the two ends of the heat insulation pipe inner pipe and the two ends of the heat insulation pipe outer pipe are welded; an air exhaust hole communicated with an inner cavity of the shell is formed in the pipe wall of one end of the heat insulation pipe outer pipe, a motor is installed in the inner cavity of the shell, a rotary connector of the motor is connected with a plug matched with the air exhaust hole, and the motor drives the plug to rotate to plug the welding air exhaust hole; one side of the shell is provided with an air exhaust nozzle communicated with the inner cavity of the shell, the air exhaust nozzle is connected with a vacuum pump, the space between the inner cavity of the shell and the inner and outer pipes of the heat insulation pipe is vacuumized, the vacuum degree needed by welding is achieved, and the high-quality welding effect is ensured. When the device is used for long pipe welding, oxidation can be avoided, the operation difficulty is reduced, and the production efficiency and the welding quality are improved.

The invention discloses a four-connecting-rod fluid loading and unloading arm, which belongs to the technical field of port and wharf fluid loading and unloading equipment, comprises a stand column, an inner arm pipe, an outer arm pipe and a rotary joint, and is characterized in that the inner arm pipe is connected with an inner arm counterweight beam, and a first counterweight block is mounted on the inner arm counterweight beam; the outer arm pipe is connected with the outer arm balance weight beam, the inner side of the inner arm balance weight beam is rotationally connected with one end of the balance weight plate, and the other end of the balance weight plate is connected with the outer arm balance weight beam through the connecting rod. The rotary joint comprises an outer ring cylinder, an inner ring cylinder, a second frameless torque motor and a sealing mechanism; the outer ring cylinder sleeves the outer side of the inner ring cylinder; a second frameless torque motor is fixedly installed in the annular containing groove, and the inner ring of the second frameless torque motor is connected with the outer wall of the inner ring cylinder. And telescopic pipe mechanisms are respectively arranged in pipe cavities of the upright post, the inner arm pipe and the outer arm pipe. Compared with the prior art, the inner pipe arm and the outer pipe arm are prevented from being shrunk and deformed when encountering cold.

The invention provides a tibia transverse moving device based on a universal rotating joint, relates to the technical field of orthopedic medical instruments, and solves the problems that in the prior art, during an operation, a bone needle is obliquely installed, and due to a rigid frame and single-plane adjustment of a traditional device, the bone needle is not stably fixed, stress is concentrated, and complications occur frequently. The device is mainly composed of a main body support, a universal rotating joint device and a short bone needle fixing mechanism, the device is symmetrically distributed on the two sides with an adjusting rotary knob as the center, in the using process, transverse moving of bones can be completed only by controlling the adjusting rotary knob, and multi-direction adjusting is achieved through universal rotating joints.

The application discloses a main shaft with a built-in center water outlet mechanism, which comprises a steel cylinder, front and rear bearing seats fixed at two ends of the steel cylinder respectively, a rotor arranged in the steel cylinder, a hollow pull rod arranged in the rotor, a tool handle connected with the pull rod and arranged at the front end of the rotor, a tool handle water channel formed in the tool handle, a rear cover fixed at the upper end of a rear bearing assembly, the upper end of the rotor being arranged in the rear cover, an oil cylinder seat fixed at the upper end of the rear cover, an oil cylinder arranged in the oil cylinder seat and capable of sliding up and down, a piston arranged in the oil cylinder, a piston rod arranged at the center of the piston, the upper end of the pull rod penetrating through the piston rod, a tail cover fixed at the upper end of the oil cylinder seat, a water inlet channel formed in the tail cover, a rotary joint assembly arranged in the tail cover and between the water inlet channel and the upper end of the pull rod. The rotary joint assembly can be integrated in the main shaft, stress of the rotary joint assembly can be avoided, and the overall performance of the main shaft is improved.

The invention relates to a waste smashing and recycling device for injection molding machining, and belongs to the technical field of injection molding machining, the waste smashing and recycling device comprises a main smashing frame, the top of the main smashing frame is fixedly connected with a material receiving frame, the bottom of the main smashing frame is fixedly connected with a conveying frame, and the bottom of the conveying frame is fixedly connected with an auxiliary smashing frame; the inner wall of the main crushing frame is rotationally connected with a crushing roller, the end of the crushing roller is rotationally connected with a rotating connector extending to the outside of the main crushing frame, and the outer wall of the main crushing frame is fixedly connected with a control box. According to the device, knocking rods and air holes are arranged, when the injection molding waste is treated through the crushing and recycling device, the knocking rods are distributed on the upper side and the lower side of a crushing roller, so that the waste of different sizes is subjected to pre-crushing and re-crushing treatment before crushing and after crushing, and meanwhile, under the arrangement of the air holes, the crushing efficiency is improved. And mechanical energy for driving the flapping plates is converted into wind energy for conveying, waste is prevented from being adsorbed to the surfaces of the crushing rollers, and the waste is synchronously cooled.

The invention discloses a double-sided polishing machine, and particularly relates to a polishing solution supply rotary joint device for the double-sided polishing machine. The rotary joint comprises a rotary joint body, a first detection inlet component is connected to the vertical upper portion of the rotary joint body, a second detection inlet component is connected to the rotary joint body in the horizontal direction, and a first polishing solution channel and a second polishing solution channel are formed in a rotary shaft of the rotary joint body. A liquid outlet of the first detection inlet component is communicated with a first polishing solution inlet of the first polishing solution channel, and a liquid outlet of the second detection inlet component is communicated with a second polishing solution inlet of the second polishing solution channel. Polishing media are conveyed through the two polishing liquid pipelines, the polishing media can freely enter from the top or the side portion, the sealing effect is good, and the two polishing media can be conveyed at the same time.

The invention discloses a hydraulic dam and a using method thereof. The hydraulic dam comprises a cylinder barrel; the rear cover is mounted at the rear end of the cylinder barrel; the front sealing sleeve is mounted at the front end of the cylinder barrel; the piston is installed in the cylinder barrel in a sliding mode, and the interior of the cylinder barrel is divided into a first cavity and a second cavity by the piston; the first end of the piston rod is connected with the piston, and the second end of the piston rod extends out of the front sealing sleeve. And the rotary joint is rotationally mounted on the cylinder barrel and can be communicated with the first cavity and / or the second cavity, even if the oil cylinder swings, the joint can also do circumferential rotation, the oil pipe is fixed, and the oil pipe cannot be snapped and equipment cannot be damaged.

The invention relates to an elastic rotary bearing for two-blade rotors that are used in wind turbines for high load cycles. The invention relates in particular to a new type of rotor hub for, in particular, elastically mounted two-blade rotors of wind turbines into which an elastic rotary bearing is integrated, which in turn is composed of two rotational joint units composed of layer elements and cone elements.

The utility model relates to a rotary joint detection device, and belongs to the technical field of rotary joint detection equipment. Comprising a rack, one end of the rack is provided with a connector A through a mounting plate A, the other end of the rack is provided with a connecting screw rod through a mounting plate B in a threaded mode, one end of the connecting screw rod is provided with an electronic hoist scale through a movable assembly A, and the portion, between the electronic hoist scale and the connector A, of the rack is provided with a worm and gear speed reducer which is provided with a driving motor. A transmission shaft of the driving motor is fixedly connected with a worm of the worm gear reducer, a rotating shaft is inserted into a worm gear center hole of the worm gear reducer, a connector B is installed at one end of the rotating shaft in a threaded mode, and the other end of the rotating shaft is connected with the electronic hoist scale through a movable assembly B. According to the rotary joint detection device, tensile detection, sealing detection and rotation detection are integrated, and the problems that an existing detection means wastes time and labor and is low in force detection efficiency are solved.

The embodiment of the invention relates to the technical field of rotary joint testing, one embodiment of the invention provides a rotary joint test board used for testing a rotary joint, the rotary joint is provided with a first joint part and a second joint part which rotate relatively, and the rotary joint test board comprises a frame body; the seat body is arranged on the frame body and used for being connected with the first connector part; one end of the rotating part is provided with a free end, and the other end of the rotating part is used for being connected with the second connector part; the swing driving assembly is arranged on the frame body, connected with the rotating part and used for driving the rotating part to rotate; and the free end is rotationally arranged relative to the bending moment assembly, and the bending moment assembly acts on the free end in the radial direction of the rotating piece and is used for providing torque for deflection of the center shaft of the second connector part relative to the center shaft of the second connector part. Through the technical scheme, the technical problem that a rotary joint test device in the prior art is difficult to meet the performance test requirement of the rotary joint is solved.

The utility model discloses efficient powder removing equipment for lamp tube production, which comprises a first conveying belt for conveying lamp tubes, and further comprises two groups of second conveying belts positioned on two sides of the first conveying belt, and the two groups of second conveying belts run in an O-shaped path; a plurality of polishing pieces are fixedly installed on chain plates of the two second conveying belts along the O-shaped movement path, each polishing piece comprises an installation plate fixedly installed on the chain plate, a long bearing is movably arranged on each installation plate, and a limiting rod arranged on the installation frame in a sliding mode is fixedly arranged on the outer wall of each long bearing; the long bearing is fixedly arranged on the hollow rotating shaft in a sleeving mode, a polishing head is fixed to one end of the hollow rotating shaft, and the other end of the hollow rotating shaft is rotationally connected with a rotating connector. According to the device, continuous grinding and powder removing operation can be conducted on the two ends of the lamp tube conveyed on the first conveying belt, and the working efficiency is greatly improved.