20results about How to "Prevent circumferential rotation" patented technology

The present application relates to a kind of rocket engine injector thin-wall milling self-positioning fixture and assembly method, it mainly includes upper positioning tire body component, conical surface expansion ring, tire unloading bottom plate, pressing cover plate, tire unloading lifting ring, pressing bolt, expansion screw, lower positioning bottom plate component, locking bolt, long fixed bolt, lower positioning bottom plate component is fixed in machine tool workbench by locking bolt long-term, always not disassembled.Product is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion screw before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thin-wall;Injector thin-wall is positioned and clamped and supported by conical surface expansion ring, tire unloading bottom plate, pressing cover plate, pressing bolt, expansion sleeve before milling injector thin-wall and positioning tire body component, limit the radial and axial movement of injector thinn

This utility model relates to the field of children's vehicle technology, specifically to a balance bike, which mainly includes: a frame, a front connecting seat, a seat connecting seat, and a rear connecting seat. By setting a handlebar adjustment component, the handlebar height can be adjusted independently with ease to accommodate children of different heights, which helps to expand the product's applicable population and service life. In cooperation with the handlebar orientation mechanism, the handlebar and seat bar can only move axially, effectively avoiding circumferential rotation, ensuring the smoothness and accuracy of the adjustment process, and providing a better user experience. It solves the problem of extremely unsmooth adjustment process and difficulty in accurately and quickly positioning to the required height.

The utility model relates to the technical field of water faucet, concretely relates to a bathroom faucet convenient to assemble, technical solution main points include valve body, valve core subassembly, end cover and handle, the hot water flow channel, cold water flow channel, water outlet flow channel and installation groove are arranged in the valve body, the tank bottom of installation groove sets up hot water hole, cold water hole and water outlet hole, the isolation department is arranged in the valve body, the isolation department is symmetrically arranged two and separates hot water and cold water, two isolation departments form the hook groove area, the canyon area, hot water hole, cold water hole are in the hook groove area, and water outlet hole is in the canyon area, and at least two positioning grooves are arranged on the tank bottom, the positioning column of two with the positioning groove insertion is arranged on the valve core subassembly, makes the water pass hole of valve core subassembly and hot water hole, cold water hole and water outlet hole mutually coincide. The utility model realizes reliable convenient assembly through above -mentioned structure.

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 present application relates to the technical field of loading and unloading machine, especially to a multi-stage telescopic sleeve mechanism of a nuclear power plant loading and unloading machine, which comprises an outer sleeve, an inner sleeve and at least one intermediate layer sleeve between the outer sleeve and the inner sleeve, the remaining sleeves outside the inner sleeve are provided with an on-off type automatic stop block device, and the remaining sleeves outside the inner sleeve are kept in a static state by the blocking and limiting of the on-off type automatic stop block device; the present application solves the problem that the telescopic sleeve stroke of deep core fuel operation is relatively long and the fixed sleeve cannot be relatively long due to process limitations; the problem that the fuel assembly cannot be loaded and unloaded because the multi-stage telescopic sleeve fuel assembly is still located in the second outer layer sleeve at a non-core station is solved; and the problem of the verticality and positioning accuracy of the multi-stage sleeve is solved.

This invention relates to an indwelling needle for transcranial Doppler ultrasound imaging, belonging to the field of medical device technology. It solves the problems of existing three-way infusion connectors with rotary valves, which suffer from incomplete closure leading to crossflow and difficulty in achieving the accurate closure position. This invention includes an injection unit, a mixing unit, a control valve unit, a first mixing chamber unit, and a second mixing chamber unit. The control valve unit switches the preparation and delivery path of the bubble contrast agent. The first and second mixing chamber units work in conjunction with the first syringe to prepare and store the bubble contrast agent. Unlike existing technologies where the user holds the first and second syringes with both hands, pushing them against each other to mix the aspirated blood with saline and air to prepare the bubble contrast agent, this invention only requires one hand, facilitating the preparation of the bubble contrast agent.

The utility model belongs to the technical field of building materials, and particularly relates to a welding stud beneficial to vertical welding, which comprises a stud body and a stud cap, one end of the stud body is arranged on the stud cap, and the other end of the stud body is uniformly provided with a plurality of drainage grooves extending to the edge of the end face. An arc striking body protruding out of the end face is arranged at the position where the drainage grooves converge at one point, and the nail cap is provided with a plurality of limiting open holes formed in the length direction of the nail body. A drainage groove is formed in the welding end of the nail body to evenly guide an arc striking body which is molten firstly to the edge of the end face, and the situation that the nail body cannot be perpendicularly arranged on a steel frame due to uneven distribution of molten fluid can be avoided. And meanwhile, the nail cap is also provided with a limiting open hole for positioning when being matched with a welding nail gun, so that the perpendicularity of the welding nail can be effectively ensured, the welding nail is prevented from rotating in the circumferential direction during solidification connection, and the connection quality of the welding nail and the steel frame is improved.

The utility model relates to a stereo garage lifting platform positioning device. The stereo garage lifting platform positioning device comprises a sliding device and a limiting device which are arranged between a guide sliding way and a lifting arm. The guide slideways are channel steel; an opening of the channel steel faces the lifting arm, and the sliding device comprises a radial guide device and a circumferential guide device; the limiting device comprises a positioning hole, a positioning rod, a guide sleeve, a connecting rod, a turntable and a speed reducer; the edge part of the turntable is hinged with the other end of the connecting rod; the radial guide device comprises a first pin shaft and a first roller; the circumferential guide device comprises a second roller, a second pin shaft and a bracket; the lifting platform has the beneficial effects that when the lifting platform is flush with the parking platform and a vehicle needs to be parked and picked, the telescopic positioning rods arranged on the lifting arms are inserted into the positioning holes, so that hard limiting of the lifting arms up and down is achieved, the lifting platform is prevented from shaking, and potential safety hazards are eliminated.

The utility model relates to the field of splashproof faucet discloses a faucet with splashproof function, including faucet main part, the front bottom of faucet main part is fixedly installed with bubbler through adjusting assembly, and adjusting assembly includes adjusting pipe and adjusting sleeve, and adjusting pipe sleeve sets in the front bottom of faucet main part, and adjusting sleeve is connected in the outer wall of adjusting pipe slidingly, and the left and right sides of adjusting pipe are all fixedly connected with limiting rod, and the outer wall of two groups of limiting rods is connected with limiting block slidingly, and the left and right sides of the front surface of adjusting sleeve close to the middle of top end are all fixedly connected with positioning rod. In the utility model, by removing the limiting of adjusting sleeve, according to the height of the object of washing, the adjusting sleeve is pulled down, drives the bubbler to move down and is close to the washing article, shortens the falling distance of water flow and reduces the impact force, at this moment, the bubble mixing structure in the bubbler cooperates with the close-range water outlet, can reduce the water flow impact force, further reduces the splashproof water effect.

The invention discloses a waste incineration corrosion accumulated ash treatment device which is mounted on a smoke outlet pipe and comprises a rotary driving mechanism and an ash scraping mechanism which are matched with each other, the ash scraping mechanism comprises a threaded rod vertically arranged in the smoke outlet pipe and scraping ring teeth capable of ascending and descending in the smoke outlet pipe. The peripheral surfaces of the scraping ring teeth are in contact with the inner wall surface of the smoke outlet pipe; a threaded hole part for the threaded rod to movably penetrate through is formed in the scraping ring tooth; the rotary driving mechanism is used for driving the threaded rod to rotate so as to drive the scraping ring teeth to ascend and descend to scrape away accumulated dust on the inner wall of the smoke outlet pipe. The smoke outlet pipe is provided with a blocking mechanism, the blocking mechanism comprises a cover plate and a lifting driving assembly, the lifting driving assembly is fixed to the outer wall of a top end opening of the smoke outlet pipe, and the cover plate is arranged above the top end opening of the smoke outlet pipe and used for being driven by the lifting driving assembly to seal and cover the smoke outlet pipe. The device has the advantages of being simple and compact in structure, small in occupied space, excellent in cleaning effect, not prone to being polluted, easy to operate and maintain and the like.

This utility model discloses a headrest electrical connector insertion and removal positioning structure, including a backrest and a headrest connected to the upper end of the backrest. The headrest has a headrest rod, and a first connector is provided at the lower end of the headrest rod. A positioning seat is fixedly installed at the upper end of the backrest, and a second connector that can move up and down is preset in the positioning seat. The first connector and the second connector can be inserted and connected. An elastic support component is provided in the positioning seat, and the second connector is supported on the elastic support component. During the up and down movement of the second connector, the elastic support component continuously applies an upward pushing force to the second connector. The second connector has a maximum moving position in the positioning seat. At this maximum moving position, the first connector and the second connector can be separated and inserted. The beneficial effect of this utility model is that, while satisfying the requirement of a detachable headrest, it can ensure that the headrest, after being installed on the backrest, still meets the technical requirements of height adjustment and wiring harness power supply.

This invention relates to the field of automotive manufacturing technology and provides an adjustable positioning mechanism for automated welding of automotive parts. The mechanism includes a fixed base, a first support rod, a second support rod, and an electrode assembly. The fixed base has a vertically mounted first and second support rods that can slide up and down relative to it. A first magnet and a second magnet are fixedly connected to the first and second support rods, respectively. The electrode assembly is mounted on the fixed base via an insulating sleeve. The electrode assembly includes an electrode, an electrode fixing base, and a lower electrode arm connected in sequence. The top of the electrode extends upward to form a positioning post for mounting the workpiece. Springs are mounted on the first and second support rods. The lower end of the spring abuts against the fixed base, and the upper end abuts against the bottom of the first or second magnet, allowing the magnet to slide with the support rod and compress the spring. This invention solves the problems of workpiece rotation and unreliable clamping in traditional positioning mechanisms.

The utility model relates to a clamping device for gear cutting, which comprises a base, a conical table is arranged on the upper portion of the base, a spacer bush is sleeved on the base, an elastic clamping sleeve is sleeved on the outer side of the conical table, the spacer bush is arranged below the elastic clamping sleeve, a positioning seat is arranged on the outer side of the spacer bush, and the elastic clamping sleeve is arranged on the outer side of the positioning seat. The positioning seat is fixedly connected with the base through a screw, a center hole is formed in the center of the base, a guide rod is arranged in the center hole in a penetrating mode, a screw rod is arranged on the upper portion of the guide rod, a nut is connected to the screw rod in a threaded mode, a gland is fixedly connected to the lower portion of the nut, and a plurality of threaded penetrating holes are evenly formed in the outer ring of the gland. And a stud is in threaded connection in the threaded through hole. The nut is arranged at the end of the clamp, the elastic clamping sleeve is extruded by screwing the gland, so that the outer diameter is expanded, the inner wall of a workpiece is held tightly, the workpiece is fixed and prevented from rotating circumferentially, and then the workpiece is pressed and fixed through the stud on the gland.

The utility model discloses a head end subassembly, inserts portion and endoscope relates to medical instrument technical field. The utility model discloses a head end subassembly, applies to endoscope, and head end subassembly includes head end seat, and the head end seat is installed at the first segment snake bone of snake bone subassembly, and the head end seat has first width and second width, and first width is less than second width, and first width is the width of head end seat along first radial direction, and second width is the width of head end seat along second radial direction, and first radial direction is the direction of head end seat and first segment snake bone connection, and second radial direction is perpendicular with first radial direction. The utility model discloses a head end subassembly, can increase the internal space of head end seat under the condition of guaranteeing the existing size of head end subassembly, or can reduce the size of head end subassembly under the condition of guaranteeing the existing internal space of head end seat, realizes the miniaturization of head end subassembly, thereby is favorable to keeping the balance between the internal space of head end seat and the size of head end subassembly.

The utility model discloses a kind of for loudspeaker accessory production's feeding device, including gripping device, and the support frame being arranged below the gripping device, the surface of the support frame is equipped with conveyor belt, the surface of the conveyor belt is symmetrically slidably connected with positioning plate, the surface of the support frame is symmetrically fixedly connected with fixed rod, the surface of the positioning plate is symmetrically opened with the limit sliding slot of adaptation, the fixed rod is slidably connected by the limit sliding slot and the positioning plate;Different sizes of loudspeaker accessories can be flexibly adjusted to adapt, and the guiding constraint of the synchronous adjusting structure and trapezoidal slide rail driven by two-way threaded rod is matched, the accurate positioning of accessory conveying is realized, deviation and grabbing failure are reduced, and, accurate blocking accessory can be realized to grab positioning, overall general-purpose, accuracy and operation convenience are considered, effectively improve feeding quality and production efficiency.

The utility model discloses high -stable cradle relates to spinning frame cradle technical field, and this high -stable cradle includes cradle shell, and the top of cradle shell is equipped with locking rocker handle, and the end of locking rocker handle is extended to the inside end of cradle shell and passes through cradle shell, the inside of cradle shell is provided with antiskid clamping seat and sliding locking seat respectively, wherein, antiskid clamping seat includes arc fixed seat, and the top of arc fixed seat is provided with rotatory clamping seat in symmetry, and every rotatory clamping seat is swing -jointed with fixed axle one end close to arc fixed seat, the utility model discloses, through the antiskid handle of hand -held end portion presss down L type pressure bar, makes the recessed slot snap dog of L type pressure bar other end to the downward pressure of the downward U type slide seat of inverting, and the stretch spring of inverting U type slide seat top can drive inverting U type slide seat to move upward, makes the antiskid clamping seat of setting in symmetry can be released to fixedly connect cradle shell stably in the installation position of spinning machine.

The electrician contraction band positioning and conveying mechanism comprises a main shaft pipe which is horizontally arranged, the two ends of the main shaft pipe are rotatably erected on an output end support of an electrician contraction band weaving machine, a middle hole is coaxially formed in the main shaft pipe, kidney-shaped holes are formed in the pipe wall of the main shaft pipe in the axial direction, and the multiple kidney-shaped holes are formed in the length direction of the main shaft pipe at equal intervals; the conveying assemblies are used for guiding and conveying the woven electrical contraction band, and the multiple conveying assemblies are arranged at equal intervals in the length direction of the main shaft pipe and correspond to the kidney-shaped holes one to one; the conveying assembly comprises a fixed sleeve and a movable sleeve which are coaxially arranged, a conveying groove with the adjustable width is formed between the movable sleeve and the fixed sleeve, and the movable sleeve is movably connected outside the pipe wall of the main shaft pipe in a sleeving mode. The core column is movably assembled in the middle hole of the main shaft pipe, the core column is connected with the movable sleeves through the kidney-shaped holes, and the core column can synchronously drive all the movable sleeves to move in the axial direction. According to the utility model, a plurality of movable sleeves are synchronously pushed and pulled by adopting the coaxial core column to realize synchronous width adjustment of all the conveying grooves.

The utility model provides a differential pressure type air tightness detection device. The differential pressure type air tightness detection device comprises a valve plate, an air inlet valve, an exhaust valve, a pressure sensor and a differential pressure sensor, the valve plate is provided with an air inlet channel, a first air outlet channel and a second air outlet channel, and the air inlet valve is connected with the air inlet channel, the first air outlet channel and the second air outlet channel and used for controlling connection and disconnection of the air inlet channel, the first air outlet channel and the second air outlet channel. The exhaust valve is connected with the first air outlet channel and the second air outlet channel and used for controlling connection and disconnection between the first air outlet channel and the outside and between the second air outlet channel and the outside. The pressure sensor is connected to the first air outlet channel and used for detecting whether the pressure in the test cavity changes or not. The pressure difference sensor is connected to the first air outlet channel and the second air outlet channel and is used for detecting the pressure difference between the test cavity and the standard cavity; according to the utility model, different test modes can be selected according to the specific requirements of users, so as to meet the requirements of test efficiency or detection accuracy.

A food waste disposer includes: a housing with a hollow interior forming a cavity; a grinding ring disposed within the cavity and having a vertically extending ring wall; a grinding disc cooperating with the grinding ring; a guide cylinder vertically disposed within the cavity, located above the grinding ring, with its inner side defining a first channel extending vertically for food waste to pass through; and a turbulence ring vertically disposed within the cavity, located between the grinding ring and the guide cylinder, with its lower end face supporting the upper end face of the ring wall and its upper end face supporting the lower end face of the guide cylinder, and the upper end face of the guide cylinder fitting against the corresponding inner wall surface of the cavity, thereby confining the guide cylinder within the cavity; simultaneously, the inner side of the turbulence ring defines a second channel extending vertically and opposite to the first channel, and at least two turbulence blocks are spaced circumferentially on the inner side of the turbulence ring. This invention can improve grinding efficiency, prevent machine leakage, and stably confine the guide components within the cavity.

The zero-degree rotation air cylinder comprises a cylinder body, a piston is arranged in an inner cavity of the cylinder body, the piston is provided with a control rod, and the circumferential freedom degree of the control rod is restrained and fixed while the control rod conducts axial movement along with the piston. The executing rod penetrates out of the front end of the cylinder cover, and the executing rod is pushed by an elastic piece to be kept in an outward extending state; the execution rods are matched with the control rods through the spiral grooves and the pins, so that the execution rods are driven to rotate through the spiral grooves in the early stage of axial movement of the control rods, the execution rods stop rotating and are converted into axial displacement after reaching the limiting positions of the spiral grooves, and meanwhile the elastic pieces are compressed to store force. The utility model has the advantages that the pressing action cannot be generated during rotation, and the pressing action is formed after rotation to reduce the axial size of the cylinder.