31results about How to "Reduce rolling friction" patented technology

The invention discloses an 8-shaped cable and 8-shaped cable production equipment, which relate to the field of optical fiber technology, and comprise an upper cable and a lower cable, wherein the upper cable and the lower cable are connected via a connecting portion, and the upper cable and the lower cable form an 8-shaped structure, wherein the upper cable comprises an upper sheath, wherein a suspension wire is arranged in the upper sheath, and the lower cable comprises a lower sheath, wherein a water-blocking layer is arranged on the inner side of the lower sheath, wherein an armor layer is arranged in the water-blocking layer, wherein a binding yarn layer is arranged in the armor layer, and wherein a plurality of wire cores are arranged in the binding yarn layer; wherein a plurality of connecting through grooves are evenly arranged on the connecting portion; wherein a connecting piece is embedded in the connecting portion, wherein the connecting piece passes through the connecting portion, and is integrally formed with the upper sheath, the connecting portion and the lower sheath; and wherein the invention provides a plurality of connecting through grooves at the connecting portion, thereby reducing the self-weight of the cable on the one hand, ensuring the normal installation and use of the cable, and reducing the material used for the sheath on the other hand, thereby reducing the use cost of the cable.

The application relates to a vacuum smelting furnace feeding lifting mechanism, which comprises a feeding chamber and a lifting device arranged at the upper end in the feeding chamber. The lifting device comprises an electric hoist, the electric hoist is provided with a chain, the end of the chain is provided with a hook, the inner side wall of the feeding chamber is provided with a rectangular frame, the rectangular frame is internally provided with a horizontally-sliding mounting rack, the front end of the mounting rack is provided with a guide plate, the outer side of the rectangular frame is provided with a horizontal moving mechanism for driving the mounting rack to horizontally move, the guide plate is provided with a through hole for the chain to pass through, and the hook is located below the guide plate. Through the combined motion of horizontal movement and vertical lifting, the hook is actively deviated from the position directly below the lifting lug, and manual pulling of the inclined hook is not needed.

The utility model belongs to electromechanical equipment technical field especially relates to a kind of electromechanical equipment surface polishing device, including polishing machine main body, the front end of polishing machine main body is fixedly installed with polishing head, dust hood is movably installed below the polishing head, the side surface of dust hood is equipped with air pipe for connecting fan, the inside of the polishing machine is equipped with buffer mechanism.The electromechanical equipment surface polishing device, dust removal mechanism is matched by fan, dust hood, rubber ring and spring one, adsorbs dust, enhances sealing, adapts to different surface, solves dust pollution and other problems;Buffer mechanism uses the floating design of spring two to unload force, reduces impact force, reduces polishing wheel wear, protects equipment, while the setting of ball in polishing machine reduces the friction between components, improves operating stability and smoothness while extending the service life of equipment.

The utility model discloses a special furnace end for a commercial fuel oil pot furnace, which comprises a furnace end seat, a placing cavity is arranged on the end face of the furnace end seat, an ignition cover is integrally formed on the end face of the furnace end seat, an upper flame arrester, a lower flame arrester and a flame distributor are arranged in the placing cavity, and a rotating mechanism is arranged in the ignition cover. The outer walls of the upper and lower flame arresters are cover bodies, annular flanges are integrally formed on the attached edge surfaces, and the rotating mechanism is used for driving the upper flame arresters to rotate relative to the positions of the lower flame arresters. By means of meshing transmission of the gear and the annular gear disc, the upper slow fire device is driven to rotate relative to the lower slow fire device, the overlapping area of the first fire outlet hole and the second fire outlet hole is dynamically adjusted, accurate control over the flame jetting amount is achieved, and compared with a traditional furnace end, the furnace end can stably output slow fire needed by slow stewing with small fire, and the energy consumption is reduced. The cooking liquor is effectively prevented from boiling and overflowing or food materials are prevented from being locally overheated and scorched, and the cooking quality of soup cooking and porridge cooking is remarkably improved.

This invention belongs to the field of fiber optic connector technology and discloses a high-return-loss fiber optic connector and its manufacturing method. The connector includes a mounting sleeve with an inner cylinder inside. An outer cylinder is threaded onto the inner cylinder. A positioning ferrule is located inside the inner cylinder, and an optical fiber cable is located inside the positioning ferrule. A spring is located on one side of the positioning ferrule. A mounting base is threaded onto the inside of the mounting sleeve. This invention uses a locking lever to simultaneously engage the inner cylinder and the mounting sleeve, achieving anti-loosening positioning of multiple components. When the anti-loosening mechanism is triggered, the rotating ring synchronously drives the clamping plate to clamp the optical fiber cable. External tensile force is directly borne by the clamping mechanism and is not transmitted to the positioning ferrule. The overall structure has strong linkage, effectively preventing axial movement and circumferential rotation of the positioning ferrule, ensuring the mating accuracy and return loss stability of the positioning ferrule, and significantly improving the connector's tensile and vibration resistance.

The invention belongs to the technical field of conductive circuit printing, and particularly relates to a transfer printing device and high-precision roll-to-roll flexible electronic printing equipment. The transfer printing device is used for printing ink to a film material in the conveying process and comprises a support, a coating roller rotationally installed on the support, a transfer printing roller rotationally installed on the support, a first driving structure used for driving the coating roller to rotate and a second driving structure used for driving the transfer printing roller to rotate. The coating roller and the transfer printing roller are connected with the output end of the first driving structure and the output end of the second driving structure respectively, a film material conveying space is formed between the roller surface of the coating roller and the roller surface of the transfer printing roller, a pit used for being filled with ink is formed in the roller surface of the coating roller, and the coating roller and the transfer printing roller rotate in the opposite directions and jointly clamp and press the film material. And the printing ink in the pits is embossed to the surface of the film material. The problem of how to improve the printing effect and the printing precision of the transfer printing device can be solved.

The utility model discloses a filling nozzle structure for a dairy product filling machine, which comprises a base, a side plate is fixedly arranged on the base, a top plate is fixedly arranged on the side wall of the side plate, a filling vessel is fixedly arranged on the top plate, openings are arranged at two ends of the filling vessel, and the openings are communicated with the filling vessel. A sealing mechanism corresponding to the filling vessel is arranged at an opening in the side, close to the top plate, of the filling vessel, a shaft rod is fixedly arranged on the lower wall of the top plate, the shaft rod is rotationally sleeved with a rotating disc, a plurality of filling nozzles are fixedly arranged on the rotating disc in the circumferential direction, and the lower ends of the filling nozzles are arranged to be conical openings of different sizes; and the size of the multiple filling nozzles corresponds to that of the lower side opening of the filling vessel, a limiting mechanism corresponding to the rotating disc is arranged on the top plate, and a pressing mechanism corresponding to the rotating disc is arranged on the shaft rod. Filling nozzles with different sizes can be rapidly replaced to adapt to filling containers with different opening sizes, and the adaptability of the device is greatly improved.

A turbine type flow sensor is provided with a main water pipe, the upper end and the lower end of the main water pipe are closed, so that a metering cabin is formed in the main water pipe, a turbine is arranged in the middle of the metering cabin, a magnet is arranged in the turbine, and a water inlet pipe transversely communicated with the upper portion of the metering cabin and a water outlet pipe transversely communicated with the lower portion of the metering cabin are arranged on one side of the main water pipe. The other side of the main water pipe is provided with a detection circuit matched with the magnet; a first conical groove located above the turbine and a second conical groove located below the turbine are formed in the metering cabin, and the first conical groove and the second conical groove are coaxially aligned; the upper end of a rotating shaft of the turbine forms a first conical part with the taper smaller than that of the first conical groove, and the lower end of the rotating shaft of the turbine forms a second conical part with the taper smaller than that of the second conical groove. The rotating shaft of the turbine always takes the cone top of the first cone part and the cone top of the second cone part as a supporting point, the rotating friction is greatly reduced in a point contact mode, the rotation starting of the turbine is accelerated, the stable rotating speed is achieved, and the response speed and the detection precision of flow detection are improved.

This utility model relates to the technical field of concrete temperature control devices, and in particular to a rotary spraying device for concrete temperature control. It includes a support frame, within which a cross seat is fitted. Multiple connecting rods are located within the support frame, with ball heads fixedly connected to the ends of the connecting rods. The ball heads at the ends of the connecting rods are rotatably connected to the cross seat. A spraying assembly is mounted on the other end of each connecting rod. A rotating frame is slidably connected to the outer wall of the connecting rods, with both ends of the rotating frame rotatably connected to the support frame. A screw is rotatably connected to the inner wall of the cross seat. In this device, rotating a knob drives the screw to rotate. Since the screw sleeve is fixed to the support rod and cannot rotate, the screw drives the cross seat to rise and fall axially. When the cross seat rises and falls, the ball heads push the connecting rods to rotate around the rotating frame, thus adjusting the tilt angle of the spraying assembly to adapt to concrete components placed in different positions. This ensures that the entire area where the concrete component is placed is sprayed, completely solving the problem of incomplete coverage in traditional devices.

The utility model provides a kind of ammonia distillation wastewater cooling equipment, belong to ammonia distillation wastewater cooling technical field, including, cooling shell, the cooling shell is cylindrical, cooling shell is used for the cooling main body of ammonia distillation wastewater;Positioning drive assembly, the positioning drive assembly is installed at the top of cooling shell, the positioning drive assembly includes support and drive unit, the drive unit is installed on support;Waste water transmission component, the waste water transmission component is vertically installed in cooling shell from top to bottom;Water replenishment component, the water replenishment component is installed in the side of cooling shell;Discharge pipe, the discharge pipe is installed in the bottom of cooling shell middle, valve one is installed on the discharge pipe.Besides the utility model solves the problem that ammonia distillation wastewater is relatively stationary when cooling and cold water is slowly self-heat pipe position to spread outside for the heat absorption of waste water, low efficiency and heat energy is easy to waste.

The utility model relates to false tooth bridge technical field discloses an easily connected and adjusted false tooth bridge, including gum, the inner wall top of gum is fixedly connected with bridge mechanism, bridge mechanism is used for connecting a plurality of false tooth, the outer wall top of bridge mechanism is fixedly connected with support mechanism, support mechanism is used for supporting fixed false tooth, the outer wall top of gum is fixedly connected with support subassembly, bridge mechanism includes positioning post, the inner wall top of gum is fixedly connected in positioning post, the outer wall middle part of positioning post is rotatably connected with connecting rod. In the utility model, false tooth bridge is composed of gum, bridge mechanism, support mechanism and support subassembly, in bridge mechanism, positioning post is fixed in gum inner wall, it is rotatably connected with connecting rod, can swing and adapt angle deviation, this bridge is applicable to multiple tooth loss repair and implant angle correction, reduces the operation difficulty, guarantees the connecting strength.

This application relates to the field of photovoltaic installation technology, providing a robotic arm anti-deviation structure and a robotic hand. The robotic arm anti-deviation structure includes a double-ended bolt with oppositely oriented threads at both ends; a rotating shaft passing through one end of the robotic arm and two side plates oppositely positioned on both sides of the robotic arm, allowing the robotic arm to rotate relative to the side plates via the rotating shaft; a fixing member for connecting the double-ended bolt and the rotating shaft, the fixing member having a screw hole and a insertion hole, the axis of the screw hole being parallel to the axis of the insertion hole; one end of the double-ended bolt is threadedly connected to the robotic arm, and the other end of the double-ended bolt is threadedly connected to the fixing member through the screw hole; the end of the rotating shaft is inserted into the insertion hole and abuts against the fixing member, allowing the fixing member to rotate around the rotating shaft via the insertion hole. The robotic hand includes the aforementioned robotic arm anti-deviation structure. This application has a simple structure and ingenious design, which can limit the relative movement between the robotic arm and the base, prevent the robotic arm from deviating, reduce the impact on the positioning accuracy of the robotic arm's end effector, and ensure installation or handling accuracy.

This utility model discloses a swinging moxibustion head for a moxibustion device, comprising: a support frame, on which a swinging head component is disposed, and on which a head shell is fixedly disposed; the swinging head component includes a fixing component fixedly connected to the swinging head component, a gear one fixedly connected to the bottom end of the fixing component, a bearing penetratingly connected to the bottom end of the gear one, a connecting seat fixedly connected to the support frame, the connecting seat being inserted into the fixing component, an mounting plate fixedly connected inside the connecting seat, the bearing being embedded in the mounting plate, a motor fixedly connected to the bottom end of the mounting plate, and a gear two fixedly connected to the output end of the motor, the gear two meshing with the gear one; in this utility model, the regular swinging of the head shell is achieved through the meshing of the gear one and gear two in the swinging head component and the motor drive, improving the automation of moxibustion treatment; the T-shaped structure of the gear one, in conjunction with the bearing, reduces rotational friction and ensures smooth swinging.

The utility model discloses a kind of hoe type film mulching hole drill, comprising: tractor and hole opening and seeding assembly, tractor is provided with power output shaft, hole opening and seeding assembly includes: assembly installation frame, one side is provided with the transmission gear box being connected with power output shaft, transmission gear box is detachably connected with tractor by universal shaft;Film mulching device, set in the front lower part of assembly installation frame;Multiple hole opening and seeding mechanism, transverse arrangement is set in the middle part of general frame body, and hole opening and seeding mechanism includes the transmission shaft being connected with the output end of transmission gear box and seed guiding interface;Multiple seed bin device, lower end is provided with the discharge port being communicated with seed guiding interface, and seed bin device is used to regularly, quantitatively to hole opening and seeding mechanism inside seed is put in.The utility model realizes film mulching, film pressing, hole opening, precision seeding integrated continuous operation.

The utility model discloses an automatic feeding device for hydraulic shrinkage heads of pipes, which relates to the technical field of metal pipe processing and comprises a pre-placing platform, a plurality of first ejection mechanisms, a positioner and a clamping and moving mechanism. The positioner comprises a plurality of V-shaped rollers; the pre-placing platform is provided with a placing and conveying plane used for placing a plurality of pipes to be machined. At least one first material blocking bracket is fixedly arranged on one side of the placing and conveying plane; the first material jacking mechanism comprises a first jacking device and a first material jacking support, and the first material jacking support is fixedly arranged on a lifting output shaft of the first jacking device; the top of the first jacking bracket is provided with a first jacking guide inclined surface; a to-be-processed pipe positioned at the first material blocking bracket can be jacked up by the first material jacking bracket and rolls to each V-shaped roller wheel along the first material jacking guide inclined surface; and the clamping moving mechanism is provided with a clamping part capable of clamping the to-be-processed pipe positioned on each V-shaped roller and conveying the to-be-processed pipe to the necking part of the necking die. The head shrinking position precision is ensured, the product quality is improved, the production efficiency is improved, and the labor intensity is reduced.

This invention provides a combined wire holder, including a base, a mounting assembly, a winding drum, and a protective mechanism. The mounting assembly is fixedly mounted on the base, and the winding drum for storing wires is movably mounted on the mounting assembly. The protective mechanism is mounted on the base and connected to the mounting assembly to ensure the winding drum can properly store and receive wires. The mounting assembly includes a first frame and a second frame. A rotating shaft is fixedly mounted in the middle of the winding drum, and both ends of the rotating shaft are rotatably mounted on the first frame and the second frame, respectively. This invention can prevent wires from slipping or falling during winding, ensuring neat and orderly winding and improving the quality of wire storage.

The invention discloses a turnover positioner, which relates to the technical field of welding tools and comprises a C-shaped rolling frame, a partial gear ring, a supporting wheel, a C-shaped support, a driving assembly and a clamp. The outer side of the C-shaped rolling frame is provided with a partial cylindrical surface I; a part of the gear ring is fixed to the C-shaped rolling frame, and the part of the gear ring and the part of the cylindrical face I are coaxial. The multiple supporting wheels are used for supporting the partial cylindrical surface I in a rolling mode and supporting different circumferential positions of the partial cylindrical surface I. The C-shaped support is used for installing the supporting wheel, and the supporting wheel is rotationally installed on the C-shaped support. The driving assembly is used for driving the C-shaped rolling frame to rotate and comprises an output gear, and the output gear is meshed with part of the gear ring. The clamp is used for fixing a workpiece and fixed to the C-shaped rolling frame. Compared with the prior art, the stability of the workpiece overturning process can be improved, and the position control precision of the workpiece overturning process can also be improved.

This invention relates to a two-dimensional electro-hydraulic servo valve driven directly by an eccentric shaft motor, comprising a spool valve assembly, a motor fixed to the top right side of the spool valve assembly, and a fork fixed to the right end of the valve core inside the spool valve assembly. The output shaft of the motor is an eccentric shaft, which is inserted into the valve body of the spool valve assembly, and the end of the eccentric shaft is embedded in a spherical bearing. The outer spherical surface of the spherical bearing is fitted into a groove on the upper part of the fork. This invention allows axial displacement caused by valve core rotation, preventing valve core jamming; it can generate a large valve core torque with a small torque input, exhibiting high response and long lifespan; the motor and linear displacement sensor are plug-in, facilitating installation.

The utility model discloses a front and rear drive pneumatic transfer case assembly of a wire hanging gearbox. The front and rear drive pneumatic transfer case assembly comprises a gearbox body, a shell, an input shaft main body, an intermediate gear, an intermediate shaft, a first intermediate gear, a second intermediate gear, an intermediate spline shaft, a drive gear, a rear drive output shaft, a front drive output shaft and a front drive separation sleeve. The gradient gear set is arranged in the gearbox body, and multi-stage speed change is achieved through axial linkage of the gradient gear set and the double-gear gears; a high-low gear sliding gear sleeve and a front driving separation sleeve are arranged in the shell, and a pneumatic shifting piece controls switching of driving modes; the input shaft main body adopts a nested structure of a main shaft I and a main shaft II and is combined with a deep groove ball bearing for supporting, so that friction loss is reduced; and the driving gear realizes quick conversion between rear drive and four-wheel drive through the nested output shaft. The multi-speed-change pneumatic drive device is compact in structure, integrates a multi-speed-change function and a pneumatic drive separation function in a limited space, and integrates high efficiency, reliability and environmental adaptability.

The invention provides a mop structure, a mop cleaning module and a mop cleaning method, and relates to the technical field of cleaning tools, and the mop structure comprises a rod body assembly, an acceleration mechanism and a mop disc. The acceleration mechanism is in transmission connection with the rod body assembly; the mop disc is in transmission connection with the acceleration mechanism, and the mop disc is provided with a wiping object; the rod body assembly rotates to drive the acceleration mechanism to operate, the acceleration mechanism operates to drive the mop disc to rotate, and the rotating speed of the mop disc is larger than that of the rod body assembly. According to the mop disc, the mop disc can be more efficient during dewatering or ground cleaning.

The utility model relates to motor technical field, concretely is a kind of shielded pole motor for water pump, including connecting plate, motor mechanism, water pump mechanism and connecting support mechanism, the motor mechanism is fixedly connected in the inside of connecting plate, the motor mechanism includes fixedly connected in the inside of connecting plate machine.The utility model in the present application, when the running winding of motor is electrified to produce alternating magnetic field, short-circuit ring will induce current, the magnetic field produced by this current and the magnetic field produced by running winding interact, thereby producing rotating magnetic field, drive motor rotor rotation, bearing reduces rotating shaft rotation friction, improves transmission efficiency, wind wheel rotates under the driving of rotor, so that the heat generated by motor can be taken away with air convection, thereby dissipating to surrounding environment, effectively reduce motor temperature, cooperate with mesh cover, effectively improve the heat dissipation performance of motor, reduce motor operating temperature, prolong the service life of motor.

The utility model relates to the field of rotary connectors, in particular to a combined dynamic sealing structure and an underwater rotary connector. The combined dynamic sealing structure is used for solving the technical problem that an existing underwater dynamic sealing structure is poor in sealing reliability, and the underwater rotary connector is used for solving the technical problem that an underwater rotary connector adopting a dynamic sealing ring as a dynamic sealing structure is prone to leakage. The combined dynamic sealing structure comprises a fixed part and a rotating part which are in rotating fit through a shaft hole, a lubricating sealing structure is arranged between the fixed part and the rotating part, and the lubricating sealing structure comprises a lubricating cavity which is formed in one of the fixed part and the rotating part and used for being filled with lubricating grease. A first sealing piece and a second sealing piece are arranged beside the lubricating sealing structure, and the first sealing piece is located on the outward side of the lubricating sealing structure so that one side of the first sealing piece can make contact with the external environment, and the other side of the first sealing piece can make contact with lubricating grease. The second sealing piece is located on the inward side of the lubricating sealing structure so that the side can make contact with lubricating grease.

The utility model discloses a pressurizing shaft sealing device for a screw feeder, and relates to the technical field of sealing of material conveying equipment, the pressurizing shaft sealing device comprises a supporting frame, the top end of the supporting frame is fixedly connected with a feeding device, and the feeding device conveys materials in a rotating mode; the feeding device is matched with the leakage-proof device, the feeding device is fixed to the top end of the supporting frame, the auger is driven by the motor to rotate, efficient conveying of materials is achieved, in the leakage-proof device, pressure can be applied through a bolt, lubricating oil in a lubricating oil cavity lubricates and seals a rotating rod of the auger, rotating friction is reduced, abrasion is reduced, and material leakage is prevented. Meanwhile, the graphite packing, the graphite mud sealing material and the graphite mud pressurizing bolt are combined, the graphite packing is pressurized through the bolt, the wrapping and sealing effects of the graphite packing and the graphite mud sealing material on the auger rotating rod are enhanced, the sealing performance is further improved, and the purpose that the materials are prevented from leaking from the contact position of the auger and the sealing device is achieved.

The utility model discloses a barreled lubricating oil transfer device which comprises a bearing plate, a moving assembly is arranged at the bottom of the bearing plate, a conical plate is arranged at the front end of the bearing plate, a mounting groove is formed in the slope face of the top of the conical plate, and rolling rollers distributed at equal intervals are rotationally mounted on the inner walls of the two sides of the mounting groove. A containing groove is formed in the top of the bearing plate, an oil drum traction mechanism is welded to the top of the rear end of the bearing plate and comprises a fixing column, and a mounting hole is transversely formed in the outer wall of one side of the fixing column. The rollers are arranged on the slope face of the conical plate, rolling friction of the oil drum is reduced, loading and unloading can be completed by a single person in cooperation with traction of the self-locking winch motor, efficiency is improved, foam cotton is wrapped by the flexible hoop, friction force is increased, pressure borne by the oil drum is buffered, and abrasion or breakage of the surface of the oil drum is avoided. And the mounting groove communicates with the placing groove, so that movement of the oil drum is not hindered, the oil drum can be guided and limited, and deviation and falling of the oil drum in the traction process are avoided.

The utility model relates to a height difference and elevation angle adjusting system for a paver screed plate, and belongs to the field of pavers. According to the technical scheme, the device comprises a telescopic mechanism and a telescopic ironing mechanism, an adjusting device is arranged between the telescopic mechanism and the telescopic ironing mechanism and comprises an upper support, one end of the upper support is hinged to the telescopic mechanism, the other end of the upper support is hinged to an adjusting mechanism, the adjusting mechanism can stretch out and draw back, and the other end of the adjusting mechanism is hinged to the telescopic mechanism; a driving mechanism is arranged at the lower end of the upper support and connected with at least one lifting mechanism, the driving mechanism is used for driving the lifting mechanism to ascend and descend, and the lower end of the lifting mechanism is connected with the telescopic ironing mechanism. By arranging the driving mechanism and the lifting mechanism, when the telescopic ironing mechanism is lifted, the lifting action of the lifting mechanism can be completed by controlling the driving mechanism, so that the height difference adjustment of the telescopic ironing mechanism is completed, and the problem that the height difference cannot be manually adjusted is avoided.

The invention discloses a high-stability stainless steel low-magnetic crane, relates to the field of cranes, solves the problems that when an existing stainless steel low-magnetic crane is used, a lifting rope swings obviously in the lifting process, and transportation is not stable enough, and comprises a stabilizing mechanism, a limiting mechanism, a lifting arm and a lifting hook, the upper end of the lifting hook is fixedly connected with a connecting block, the connecting block is fixedly connected with a lifting rope, the stabilizing mechanism comprises socketed pipes, and the limiting mechanism comprises a fixed shaft and a rotating disc. According to the high-stability stainless steel low-magnetism crane, the flexibility of the lifting rope can be kept in the lifting rope winding and unwinding process by controlling the distance between the socketed pipes conveniently; in the lifting process, the distance between the socketed pipes is reduced, the stability in the lifting process is improved, and when the stabilizing mechanism operates, the rotating friction between the fixed shaft and the rotating disc is linked and improved, so that the overall swinging resistance of the stabilizing mechanism and the lifting hook in the lifting process is increased, and shaking is reduced.

The utility model relates to the technical field of wind power generation equipment, in particular to a clutch type carbon brush slip ring device for cable twisting prevention of a wind generating set, which comprises an upper turntable assembly, a lower turntable assembly, a clutch mechanism, a slip ring structure and a carbon brush assembly, the clutch mechanism comprises a guide assembly and a shaft sleeve capable of moving axially, when the upper rotating shaft rotates by a certain angle, the upper rotating shaft is meshed with the shaft sleeve through the guide assembly, the shaft sleeve is meshed with the lower rotating shaft through the guide assembly, and a complete torque transmission path can be formed between the upper rotating shaft and the lower rotating shaft. The binding post is electrically connected with the carbon brush assembly through a flexible wire, the arrangement mode of the flexible wire allows relative rotation of the upper rotating disc assembly and the lower rotating disc assembly, and under the condition that a torque transmission path is not formed between the upper rotating shaft and the lower rotating shaft, the upper rotating shaft does not drive the lower rotating shaft to rotate when rotating. The carbon brush assembly and the slip ring structure are kept relatively static, so that rotation friction between the carbon brush assembly and the slip ring structure can be reduced, and maintenance frequency and cost are reduced.

The utility model discloses a leakage-free swing check valve, and relates to the field of valves. The leakage-free swing check valve comprises a valve body, a valve clack, a rocker, a pin shaft, a connecting piece and a shaft sleeve. The pin shaft is arranged in the valve body, the rocker is connected to the pin shaft, and the connecting piece is arranged in the valve body. The pin shaft, the connecting piece and the shaft sleeve are arranged in the valve body, the rocker and the pin shaft are fixed through the connecting piece, leakage of fluid media can be avoided, the shaft sleeve is arranged between the pin shaft and the valve body, the low-friction performance of the shaft sleeve is utilized, rotating friction of the pin shaft driven by the rocker is reduced, opening resistance of the valve clack is reduced, and safety of the valve clack is improved. And the reliability of the check valve in the working stage is ensured.

The utility model provides a circuit board curvature detection device, and relates to the technical field of circuit board curvature detection, the circuit board curvature detection device comprises a detector, the surface of the detector is fixedly connected with a control panel, the surface of one side of the detector is fixedly connected with a mounting rack, the surface of the detector is provided with a rotating rack, and the rotating rack is fixedly connected with the control panel. A stabilizing device is arranged on the surface of the detector, the stabilizing device comprises two mounting plates, the two mounting plates are fixedly connected to the two sides of the surface of the detector respectively, and the surfaces of the two mounting plates are in threaded connection with screw rods in a penetrating mode respectively; according to the technical scheme of the utility model, the problems in the prior art that when a detector is placed on a desktop and started to operate, the detector vibrates to a certain extent, and surrounding workers are in contact with the detector, so that the position of the detector shakes and deviates, thereby affecting the normal detection of a circuit board and even affecting the accuracy and reliability of a detection result. And the use effect and the practicability of the detector are reduced.