300 results about "Arcuate shape" patented technology

A support cushion includes a cushion body that includes fill material and an outer covering that encases the fill material. The cushion body has a first end, a second end, an outer peripheral edge, and an inner peripheral edge. The outer and inner peripheral edges have a generally arcuate shape between the first end and the second end. The cushion body defines a vertical axis about which the outer and inner peripheral edges curve. The cushion body tapers inward in a direction parallel to the vertical axis to define an arcuate depression in the cushion body that extends along a majority a length of the cushion body between the first and second ends.

A compression fitting includes a first fitting segment defining a first arcuate central section, a first retention rib extending radially inward from the first arcuate central section; a second fitting segment defining a second arcuate central section, a second retention rib ending radially inward from the second arcuate central section; and a grip ring defining a first ring end and a second ring end, wherein a split is defined between the first ring end and the second ring end, and wherein the first ring end engages the first retention rib and the second ring end engages the second retention rib.

The present invention relates to a coffin with a lower side and an upper side. Said coffin comprises a structure and an inner lid, where the structure includes a first frame located on the lower side of the coffin, a second frame located on the upper side of the coffin, a plurality of ribs connected to the first frame, protruding towards the upper side, and connecting the second frame with said first frame, and a covering surface connected to the ribs. In turn, the inner lid has an arcuate shape and is arranged on an inner side of the second frame, where the ends of the inner lid arcuate shape lay on the ribs of the structure.Moreover, in some embodiments of the invention the coffin comprises at least one retractable handle arranged on the cover surface. Said handle can comprise a handgrip, a lanyard connected to the handgrip and to the first frame; and an elastic element connected to the cover surface and coupled to the lanyard. The elastic element is set up to exert an elastic force on the lanyard that allows for the handgrip to be drawn towards the cover surface.

The utility model belongs to the field of preheating, and particularly relates to a middle trough pre-welding preheating device which comprises a preheating device body. The middle part of the preheating device body is connected with a plurality of groups of gas tanks; the end parts of the gas tanks are connected with conveying pipelines; the end part of the conveying pipeline is connected with a flame gun; a plurality of groups of arc-shaped plates are fixedly connected to the top of the preheating device body; the middle part of the arc-shaped plate is connected with a bidirectional threaded rod; the two ends of the two-way threaded rod are in threaded connection with arch-shaped clamping plates; the middle groove is clamped by the arch-shaped clamping plate, so that the situation that the working difficulty of subsequent welding and finishing of the middle groove is increased due to local deformation and distortion of the middle groove caused by the fact that thermal stress is easily generated due to temperature change when the middle groove is preheated can be prevented, and the working difficulty of subsequent welding and finishing of the middle groove is further increased. A certain effect of limiting the two-way threaded rod can be achieved, so that the stability of the arch-shaped clamping plate is improved.

A casing for a turbine engine including a composite section. The composite section has (i) an arcuate shape or an annular shape and (ii) a circumferential direction. The composite section includes a matrix and a plurality of circumferential reinforcing fiber tows embedded in the matrix. Each circumferential reinforcing fiber tow of the plurality of circumferential reinforcing fiber tows extends in the circumferential direction and has a plurality of undulations in the circumferential direction to allow the matrix material of the composite section to expand circumferentially.

The invention discloses a T-shaped composite material stiffened wallboard co-curing forming mold and a forming method, in a wallboard forming mold in the forming mold, the forming molded surface of the upper end face of a mold frame is consistent with the outer molded surface of a skin of a stiffened wallboard and is used for paving and forming a combination of a skin blank and a T-shaped stringer blank on the skin blank; and co-curing and forming the stiffened wall plate. The T-shaped stringer blanks are arranged on the skin blank in an inverted mode at intervals; an edge cleaning strip is placed on the end face of a web of each uncured T-shaped stringer blank, the two sides of each T-shaped stringer blank are each provided with an L-shaped core mold, the upper portions of the L-shaped core molds are arranged on the two sides of the corresponding edge cleaning strip in a clamped mode, a soft mold is placed between every two adjacent T-shaped stringer blanks, and all the soft molds are placed on uncured skin blanks; and the outer sides of the L-shaped core molds on the two sides of the T-shaped stringer blank are clamped and fixed through a bow-shaped clamp. According to the method, the problem that the quality of the stiffened wall plate is difficult to meet the product requirement to different degrees due to the existing co-curing stiffened wall plate mode is solved.

The utility model relates to the technical field of mobile injection molding equipment, and discloses a movable device for injection molding of a bow-shaped handle, which comprises a workbench, the bottom of the workbench is fixedly connected with a plurality of universal wheels, the outer walls of the plurality of universal wheels are fixedly connected with latches, the bottom of the outer wall of the workbench is fixedly connected with a plurality of telescopic legs, and the bottom of the outer wall of the workbench is fixedly connected with the telescopic legs. The bottoms of the multiple telescopic legs are fixedly connected with non-slip mats, and the right side of the top of the workbench is fixedly connected with two sliding rails. The clamping teeth on the universal wheels can clamp the universal wheels to enable the universal wheels to stop rotating, the telescopic legs are installed at the bottom of the working table, the non-slip mats at the bottoms of the telescopic legs increase friction force and stabilize the working table, the sliding rails are fixed to the top of the top of the working table, the movable plate blocks connected with the sliding blocks can slide, and operation space is reserved for equipment maintenance. And after moving in place, the telescopic legs are released, so that the non-slip mats are in contact with the ground to stabilize the workbench, the pressure of the universal wheels is divided, and the moving effect of the device is achieved while stabilization is achieved.

The invention belongs to the technical field of PCB detection, particularly relates to a PCB ceramic substrate appearance laser measuring instrument, and aims to solve the problem that tiny cracks hidden on a substrate are difficult to find when the substrate is not stressed in the actual detection process, the following scheme is provided: the PCB ceramic substrate appearance laser measuring instrument comprises a counterweight seat, support rods are fixed on the upper surface of the counterweight seat close to four corners, and the support rods are fixed on the upper surface of the counterweight seat; the top ends of the four supporting rods are fixedly provided with the same workbench, the middle of the workbench is rotationally connected with a vertical supporting pipe, the top end of the supporting pipe is fixedly provided with an arch-shaped supporting plate, and the two ends of the arch-shaped supporting plate are provided with bearing modules which are of the same structure and are symmetrical to each other respectively. According to the invention, the ceramic plate body can be extruded before surface defect detection, so that the residual stress of the ceramic plate body can be amplified to a certain extent, some potential surface micro-defects are forced to be amplified, a laser probe can find the surface micro-defects more easily, and potential quality defects of the ceramic plate body can be detected.

A peg hook includes a mount and a rod extending from the mount. A tip is pivotally mounted to a distal end of the rod, the tip having a generally straight end and an arcuate body, wherein the tip and the rod each include a flat portion that are pinned to each other to permit the tip to rotate between an extended position and a retracted position.

A quick connect tool, a replaceable tool, and methods are disclosed. The replaceable tool includes a shaft having a tool end, a coupling end opposite the tool end, and a longitudinal axis extending between the coupling end and the tool end. The shaft has a tool portion defining the tool end, a coupling portion defining the coupling end, the coupling portion having an outer peripheral surface shaped into a flat portion coextensive with an arcuate portion cooperatively forming a D-shaped cross-section. The flat portion and the arcuate portion extend along the longitudinal axis. The outer peripheral surface defines a peripheral groove extending transversely with respect to the longitudinal axis. The peripheral groove is configured to receive a bearing, and the outer peripheral surface also defines a bearing surface having a shape conforming to a partial spiral extending around the longitudinal axis and located at the coupling end of the shaft.

A box magazine fed firearm includes pinch tabs in the receiver of the firearm. In one embodiment, the pinch tabs are opposing pieces of spring steel extending upwardly and inwardly from opposing lateral sides of the receiver. In one embodiment, the pinch tabs are sections of flat spring steel bent into an arcuate shape and secured to the receiver by screws. In one embodiment, tension screws are used to adjust an inward bias of each of the pinch tabs.

A lumbar interbody fusion device includes a first wing, a second wing, and a bridge. The bridge has an arcuate resting shape and include a first end connected to the first wing, a second end connected to the second wing, and at least one aperture extending through the bridge in a radial direction relative to the arcuate resting shape of the bridge. The bridge is elastically deformable such that a distance between the first wing and the second wing may vary according to elastic deformation of the bridge.

The present invention relates to the field of aviation engine manufacturing technology, and in particular to a riveting fixture and method for a funnel mixer assembly. The riveting fixture includes a bottom plate and a base evenly distributed in an annular manner at the outer edge of the top surface of the bottom plate; a bow frame positioning rod is slidably inserted on the base, and the inner end of the bow frame positioning rod is provided with a V-shaped groove for accommodating the bow frame; a support plate is installed on the lower surface of the inner end of the bow frame positioning rod for supporting the bow frame and the reinforcement ring; a plurality of arc-shaped positioning strips are evenly distributed in an annular manner on the top surface of the bottom plate, and the positioning arc surfaces on the inner sides of all the arc-shaped positioning strips are on the same circumference; a plurality of expansion blocks are slidably installed on the top surface of the bottom plate for tightening the lobes on the mixer welding assembly; a plurality of driving mechanisms are provided on the top surface of the bottom plate, and each expansion block is provided with a corresponding driving mechanism, and the driving mechanism is connected to the expansion block for driving the expansion block to slide along the radial direction.

The utility model relates to the technical field of teaching equipment, in particular to Chinese pinyin teaching equipment which comprises a showing stand, the middle of the showing stand is in a grid shape and forms a plurality of storage spaces, syllable blocks are clamped in the storage spaces, and a sliding frame capable of sliding up and down is arranged in front of the showing stand. The display rack has the advantages that the middle of the display rack is in the grid shape to form a plurality of storage spaces, the syllable blocks are placed in the storage spaces, the arch-shaped elastic plates are fixedly connected to the two sides of the outer surfaces of the syllable blocks, the syllable blocks can be fixedly installed in the storage spaces through bending of the arch-shaped elastic plates, and installation and disassembly are convenient. The front of the showing stand is connected with the sliding frame in a sliding mode, the sliding frame is a rectangular frame, the syllable blocks can also be clamped in the sliding frame, a teacher can conveniently combine and identify different syllables, the sliding frame can shield other syllables, and interference to the identification process of children is avoided.

The present application belongs to the technical field of part processing, and relates to a fork head arc surface grinding device and method for a shift fork type part. The device comprises a mounting bracket, a pressing center, an adjusting center and an arc-shaped bracket. The pressing center and the adjusting center are coaxially arranged on the mounting bracket from top to bottom. The arc-shaped bracket is arranged between the pressing center and the adjusting center. The upper end surface of the arc-shaped bracket is in contact with the pressing center, and the lower end surface of the arc-shaped bracket is in contact with the adjusting center. The arc-shaped bracket rotates around the axial direction of the pressing center. The present application provides a fork head arc surface grinding device and method for a shift fork type part, which has stable processing quality, high efficiency, low cost, convenient processing operation and strong adaptability.

This utility model relates to the field of dustproof technology, and provides a dustproof structure for the driven wheel of a packaging clamping and shaping machine. It includes a dustproof cover sleeved on a rotating shaft, which mates with the arc-shaped sealing surfaces at both ends of the rotating shaft. Sealing oil is filled between the dustproof cover and the rotating shaft. Annular grooves for storing the sealing oil are formed on both the arc-shaped sealing surfaces of the dustproof cover and the rotating shaft. Through this dual design of the arc-shaped sealing surface mating and the sealing oil filling the annular grooves, comprehensive protection of the rotating shaft is achieved, effectively reducing the risk of jamming or wear caused by dust intrusion, extending the service life of the rotating shaft, reducing downtime maintenance frequency, and ensuring continuous and stable operation of the production line.

A compressor includes a shell, a compression mechanism, a driveshaft operable to drive the compression mechanism to compress a fluid, and a ring-shaped counterweight assembly positioned on the driveshaft. The counterweight assembly includes a counterweight fixed on the driveshaft and a cover attached to the driveshaft via a snap fit connection. The counterweight includes a coupling ring and a main weight having an arcuate shape, the coupling ring defining a bore receiving the driveshaft to fix the counterweight on the driveshaft. The counterweight and the cover cooperate to define the counterweight assembly, the cover extending circumferentially between two cover end surfaces each positioned adjacent one of two circumferential main weight end surfaces to define a disk-shape of the counterweight assembly. The cover includes a coupling collar including a circular base and flexible fingers engageable with a circumferential groove defined on the driveshaft to form the snap fit connection.

The invention belongs to the technical field of cable manufacturing, and particularly relates to a novel pressure-bearing power cable which comprises wires, an insulating material, a filler and an outer sheath, the wires are molded line structures made of annealed soft copper wires, the wires are wrapped by the insulating material, a plurality of wires wrapped by the insulating material are gathered into a whole, and the outer sheath is sleeved with the filler. The insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, the insulating material wraps the insulating material, and the insulating material wraps the insulating material. The lead, the insulating material and the filler are all positioned in the middle of the arch; the power cable can bear materials such as vehicles to pass through the surface by means of the special structure of the power cable, and has the advantages of being waterproof and not prone to breakage.

The utility model discloses a dismounting device for a large-diameter bolt in a narrow space, which is characterized in that in a bolt push-out assembly, a pressure transmission module is fixedly arranged on the inner side end face of one side plate of a bow-shaped clamp, and the other side plate of the bow-shaped clamp is in threaded connection with a hexagon bolt through a threaded hole in the middle; the groove-shaped cavity of the cushion block is arranged on the bolt head of the product bolt in a sleeving mode, the threaded end of the product bolt makes contact with the sensing end of the pressure transmission module, the hexagon bolt is screwed to enable pressure to act on the top end of the cushion block, counter-acting force acts on the threaded end of the product bolt through the pressure transmission module, and the product bolt is pushed out. The bolt head generates the displacement of being pushed out in the groove-shaped cavity of the cushion block; the bolt pulling-out assembly is arranged on the bolt head of the product bolt in a sleeving mode through the concave clamping groove in the end, and pulling-out force is applied to the product bolt through the concave clamping groove so that the product bolt can be pulled out of the machine body structure. The utility model solves the problem that the surface and the hole wall of the bolt are damaged due to local deformation of the butt-joint bolt easily caused by the traditional dismounting mode of the bolt.

This invention discloses a pressure and airtightness test fixture for a rectifier support casing and its usage method. The test fixture includes a base plate and a cover plate connected to the upper space of the base plate via Class B equal-length double-ended studs. A first sealing ring and a second sealing ring are respectively fitted on the base plate and the cover plate. Several screw holes are provided on the cover plate. A first pressure plate and a second pressure plate are fixed between the base plate and the cover plate by an arc-shaped bracket and C-type hexagonal head clamping screws. A first sealing gasket and a second sealing gasket are respectively fitted on the first pressure plate and the second pressure plate, and an adapter is connected to the first pressure plate. This fixture enables pressure and airtightness testing of the entire weld seam of a part, solving the prominent problem of slow efficiency in testing weld seams of individual plates, and improving the quality of pressure and airtightness testing and the efficiency of part processing.

The invention discloses a multifunctional operating handle of a power distribution switch. The multifunctional operating handle comprises a crank and a plurality of operating joints, the crank comprises an arch-shaped transmission rod, a handle and a connecting piece, the connecting piece is arranged at the first end of the arch-shaped transmission rod, the handle is arranged at the second end of the arch-shaped transmission rod, the operation connector comprises an operation part and a connecting part, the connecting part is detachably connected with the connecting piece, and the operation part comprises two operation heads. The multifunctional operating handle of the power distribution switch has the advantages that the handle adapts to various types of operating joints, and the operating efficiency is high.

The invention relates to the technical field of poultry farming, and discloses a goose massage semen collection device and a using method, the goose massage semen collection device comprises a fixing table, an arc-shaped concave part is arranged on the fixing table, and an arc-shaped outer frame is fixed on the outer side of the fixing table; the shading head and neck fixing pipe is fixed to the fixing table and located on the left side of the arc-shaped concave part, the shading head and neck fixing pipe is used for constraining the head and neck of the male goose so as to reduce the stress response of the male goose, the arch-shaped climbers are located on the fixing table and located on the front side and the rear side of the arc-shaped concave part, and constraining pieces for fixing goose limbs are installed on the arch-shaped climbers; the nervous mood of the male goose is reduced through the shading head and neck fixing pipe, meanwhile, the stimulation process in the natural mating environment is simulated through the back massage mechanism, the stimulation effect of sexual reflex is improved, meanwhile, the designed cloaca bionic mechanism can be accurately in butt joint with a semen discharge opening, and the sexual reflex effect is improved. Semen discharge is further promoted through the alternate inflation and deflation function of the pinching and pressing air bag, and therefore the semen collection quality and quantity are guaranteed.

The invention belongs to the technical field of grinding wheel dressing machining, and provides a large-range spherical arc grinding wheel dressing device. The trimming device comprises a diamond pen and a rotating arm, the rotating arm is in an arch shape, a first through hole perpendicular to the extending direction of the rotating arm is formed in the middle of the arch shape of the rotating arm, the two ends of the arch shape of the rotating arm are located on the same vertical straight line, and the trimming device further comprises a positioning device with one end for fixing the diamond pen. The end, away from the diamond pen, of the positioning device can adjust the relative position of the diamond pen and the swing axis of the rotating arm. Through the arrangement, the feeding amount of the diamond pen can be adjusted in a large range, large-range curvature radius dressing is achieved, and the adaptability of the grinding wheel dressing device is improved; cutting force can be monitored in real time, and the abrasion state of the diamond pen is indirectly judged; the feeding precision of the diamond pen is improved, and stepless adjustment of the relative positions of the diamond pen and the swing axis of the rotating arm is achieved.

The application discloses a restraining module for preventing arch deformation in a bidirectional stretching process and a bidirectional stretching device, and the restraining module comprises a fixed frame, a power source is installed on the fixed frame, the power source drives the arc surface of an arc roller to rotate, the arc roller can be adjusted to form different arc heights, two sets of expander rollers are arranged on the two sides of the fixed frame, the two sets of expander rollers are located downstream of the arc roller, the two sets of expander rollers have initial angles which are perpendicular to the length of the film, and the two sets of expander rollers can be unfolded and form different unfolding angles relative to the initial angles. The arc height of the arc roller is dynamically adjusted to change the travel of the film along the conveying direction when the film is stretched in the transverse direction, and the unfolding angle of the two sets of expander rollers is dynamically adjusted to generate a forward oblique pulling force on the film, which can effectively offset the arch deformation of the film, reduce the orientation anisotropy of the film at different positions, make the mechanical properties and thermal shrinkage rate of the film uniform, and improve the surface flatness and thickness uniformity.

To realize a structure having a non-linear cylindrical hole inside by using a mold.SOLUTION: A mold comprises a fixed mold and a movable mold. The movable mold has an arcuate shape and a slide core that is movable in an arcuate manner. The slide core is integrally formed with an arcuate rod-shaped member.SELECTED DRAWING: Figure 3

The application relates to a stress-preventing processing tool for an insert piece casting, which comprises a base, a support table, a special block, a clamping unit and a height limiting unit, the special block is detachably installed above the support table, the clamping unit is arranged on the two sides of the special block, the clamping unit comprises a base, an arcuate frame, a first telescopic spring and a pressing block, a T-shaped groove is arranged above the arcuate frame, a limiting block is arranged in the T-shaped groove, and the two ends of the first telescopic spring are fixedly connected with the base and the limiting block, the height limiting unit comprises an L-shaped support, a telescopic rod, a pressing rod and a locking nut, a T-shaped sliding rail is arranged in the L-shaped support, and the telescopic rod is matched with the T-shaped sliding rail. The special block is used for fixing the insert piece, the clamping units on the two sides are used for pressing the whole insert piece, the insert piece is prevented from being deformed, the height limiting unit is used for reinforcing the clamping units and detecting the height change of the pressing rod, and the effect is excellent.

The utility model discloses a power transmission line engineering foundation pit operation protection device which comprises a telescopic supporting rod component and an arc-shaped plate component detachably connected with the upper end of the telescopic supporting rod component, the lower end of the supporting rod component is supported at the pit bottom in the excavation process, and the arc height of the arc-shaped plate component is smaller than the radius of a circle corresponding to a foundation pit. And the periphery of the cambered plate component is erected on a layer step of the foundation pit retaining wall. The height of the supporting rod component is adjustable, and the supporting rod component can be installed and used when excavated to different depths and unearthed. During installation, the supporting rod component is supported at the real-time pit bottom, the cambered plate component is erected on a layer step of a foundation pit protection wall, and stable installation of the whole device can be guaranteed. During soil lifting operation, an operator in a pit stands under the arched plate component, and the arched height of the arched plate component is smaller than the radius of a corresponding circle of the foundation pit, so that on one hand, normal lifting of the soil lifting frame is guaranteed, and on the other hand, when the soil lifting frame falls and hits the arched plate, it can be guaranteed that the protection device overturns towards the large side of the space of the foundation pit.

The application discloses a detection device of a wave energy device and belongs to the technical field of marine device detection devices. The device comprises a horizontal cross beam, an arc-shaped guide rail and a suspension mechanism. The horizontal cross beam and the arc-shaped guide rail form an arc-shaped structure. The suspension mechanism is slidably connected with the arc-shaped guide rail. One end of the horizontal cross beam is provided with a first lifting ring, and the other end of the horizontal cross beam is provided with at least three second lifting rings along the length direction of the horizontal cross beam. When lifting, the lifting speed of the two ends of the horizontal cross beam is changed to generate a speed difference in the vertical direction, then the horizontal movement is generated through the transverse sliding of the suspension mechanism, and the random motion track is generated through the mutual composition of multiple movements, so that the motion state of the sea wave can be more truly simulated. The application effectively solves the problems that the existing detection device has a single fitted motion track and cannot restore the actual working environment, so that the detected data is distorted and has low reference value.