97results about How to "Achieve axial fixation" patented technology

The invention provides an aircraft and a propeller fast disassembly device thereof, a fast-disassembly propeller and a propeller base component. The propeller fast disassembly device comprises a fast-disassembly propeller and a propeller base component; the fast-disassembly propeller comprises a seat body and a blade arranged on the seat body; the propeller base component comprises a fixed seat and a key switch; a clamping mechanism in detachable connection through rotation is arranged between the fixed seat and the seat body; the key switch is provided with a key body suitable for pressing touch and a key block fixed on the key body; multiple positioning structures corresponding to the key block when the seat body is in a clamping position are formed on the side of the seat body facing the fixed seat; and the key block is embedded into the positioning structure in a state without external force pressing and clamped between the fixed seat and the seat body, thus the peripheral movement of the fast-disassembly propeller is limited by the key block and a positioning slot, and such limitation is different from axial force limitation, therefore the mechanical strength is improved and an effect of good stability is realized.

To provide a remote control system which is operable by using a portable terminal only when a person is present near a vehicle.The remote control system is formed of a receiving means for receiving a door locking request signal or a door unlocking request signal, a door locking mechanism, a signal determining means for determining whether a signal received by the receiving means is the door locking request signal or the door unlocking request signal, a locking instructing means for transmitting a locking instruction signal to the locking mechanism, an unlocking instructing means for transmitting an unlocking instruction signal to the locking mechanism, and a person checking means for checking whether or not a person is present near the vehicle, and transmitting a person confirmation signal to the unlocking instructing means. If the signal determining means determines that the signal received by the receiving means is the door locking request signal, the locking instructing means transmits the locking instruction signal to the locking mechanism. If the signal determining means determines that the signal received by the receiving means is the door unlocking request signal, the unlocking instructing means transmits the unlocking instruction signal to the locking mechanism on condition that the locking mechanism receives the person confirmation signal in a predetermined time period.

The invention provides an integral casing centralizer and a manufacturing method thereof, belonging to the field of oil and gas well cementing. The integral casing centralizer is processed by uniform wall thickness material pipe or plate, including hoops at both ends, and limbs located between the hoops at both ends; the limbs are evenly distributed on the circumference, and each The two ends of each limb are respectively connected with the hoops at both ends; each limb is arched outward; the outer diameter of the centralizer formed by all the limbs is smaller than or equal to the inner diameter of the upper casing.

The invention relates to a rotary pressure maintaining coring method for ocean drilling. The method includes the following steps: 1) placing an inner tube assembly into an outer tube assembly at the bottom of a hole by a salvage spear head; 2) sending the inner tube assembly to the outer tube assembly by a rope for sitting clamping, then simultaneously drilling down to a bottom hole stratum, and performing rotary core sample coring through cooperation of an outer tube drill bit and a middle tube drill bit together; 3) driving a shear pin of an inner tube assembly b by the f salvage spear headto cut and removing clamping with the inner tube assembly, then sliding upward along an inner tube assembly a, allowing a core tube containing a core sample to slide upward into the inner tube assembly a, and giving thrust to a ball valve by a spring through a ball valve driving nipple, and driving the ball valve to slide downward and achieving overturn of 90 degrees; and 4) making the inner tubeassembly remove clamping from an appearance assembly and pulling out of a wellhead by the salvage spear head, taking out the core sample, and completing a pressure maintaining coring process. The method achieves rotary pressure maintaining sampling, can adapt to a quaternary system sedimentary stratum and bed rock, and is wider in application range.

The invention relates to a natural gas hydrate rotary pressure maintaining coring device which comprises an outer pipe assembly and an inner pipe assembly mounted in the outer pipe assembly, a drilling bit is arranged at the bottom end of the outer pipe assembly, the inner pipe assembly comprises an inner pipe assembly a and an inner pipe assembly b, the inner pipe assembly b is mounted in the inner pipe assembly a and can move along to the axis direction of the inner pipe assembly a, the inner pipe assembly a comprises a fishing spearhead, an elastic card mechanism, a lengthening pipe, a middle pipe short joint, a short connector, a sealing short joint, a connecting pipe, a middle pipe and a pressure retaining ball valve overturning and sealing mechanism which are sequentially connected from top to bottom, and the inner pipe assembly b comprises a lifting device, an elastic card hanging mechanism, an elastic pin short joint, an single-acting mechanism, a transformation connector, an adjusting connector, a connecting pipe, a sealing mechanism, a connecting long pipe, a connecting long pipe short joint and a rock core pipe which are sequentially connected from top to bottom. According to the device, rotary pressure maintaining sampling is achieved, the device can adapt to quaternary sedimentary land layers and bed rock and wider in application range.

The invention provides a floating vehicle fixture for a differential shell. The floating vehicle comprises a lathe chuck, a first locking component and a second locking component, the lathe chuck is provided with a base plate and an upper plate. An axially movable floating sleeve is placed into the upper plate, a pair of fixing blocks are symmetrically arranged on the upper plate, a positioning column is arranged on each fixing block and extends into a small sinking trough of the differential shell, the first locking component is arranged in the floating sleeve and extends into a center hole of the differential shell, and the second locking component is fixed onto the lathe chuck, extends from a window of the differential shell and is used for pressing the lower edge of the window. By the aid of the floating sleeve, a spherical side wall of the differential shell is supported by the floating sleeve, and three springs are arranged below the floating sleeve, so that the floating sleeve clings to a workpiece. By the aid of the first locking component and the second locking component, a workpiece is preliminarily and mainly clamped, so that the workpiece is clamped by the vehicle fixture.

The invention discloses a clamp. The clamp comprises a base, a disc cover and multiple clamping claws. The disc cover comprises a circle of disc cover side plate and a disc cover top plate. Multiple top plate guide grooves are formed in the disc cover top plate. Each clamping claw comprises a clamping claw sliding rail and a clamping claw pressure head. The top faces of the clamping claw sliding rails are located above the disc cover top plate, and the clamping claw pressure heads are mounted on the top faces of the clamping claw sliding rails through locking bolts. At least part of each clamping claw pressure head can stretch out of the corresponding clamping claw sliding rail by facing the center of the disc cover top plate. A transmission device used for driving the multiple clamping claw sliding rails to move synchronously is mounted in the disc cover. According to the clamp, self centering of a sample disc can be achieved, it is ensured that the sample disc is located at the center position of the disc cover plate, meanwhile, peripheral and axial fixing of the sample disc is achieved, loosening and up-and-down motion are avoided in the experiment process of the sample disc, and testing precision is improved.

The invention belongs to the technical field of bearings, and in particular relates to a cylindrical roller bearing, which includes an outer ring, an inner ring and several rollers. There are flanges extending outward at both ends, and the inner ring has a shaft hole. The shaft hole of the inner ring passes through the flange along its axis direction, and the inner peripheral surface of the flange is provided with an arc-shaped groove communicating with the shaft hole. , the arc-shaped groove is slidingly provided with a matching arc-shaped plate, the inner surface of the arc-shaped plate is fixed with an arc-shaped rubber block, and the arc-shaped plate is pushed by tightening the locking screw, and the arc-shaped rubber block is held against On the rotating shaft, so as to realize the axial fixation of the bearing on the rotating shaft, wherein, the arc-shaped plate can evenly set off the arc-shaped rubber block, so that the arc-shaped rubber block can better touch the rotating shaft, and the contact between the arc-shaped rubber block and the rotating shaft The large area allows the bearing to be axially positioned on the rotating shaft more reliably.

The invention provides a corn threshing concave plate with adjustable grid intervals. The corn threshing concave plate comprises a fixing mechanism for grid circular steels, grid circular steels, an upper connecting plate, two grid circular steel slide slot plates and a lower connecting plate, wherein the fixing mechanism for grid circular steels comprises a fixing plate and a connecting plate; the upper end of the connecting plate is detachably connected with the upper connecting plate; the upper end of the fixing plate is fixedly connected with the lower end of the connecting plate; a hinge hole is formed at the lower end of the fixing plate and is hinged with the lower connecting plate; the top ends of the grid circular steel slide slot plates are respectively in fixed connection with the two ends of the upper connecting plate; the bottom ends of the grid circular steel slide slot plates are respectively in fixed connection with the two ends of the lower connecting plate; the grid circular steels can slide in the slide slots of the grid circular steel slide slot plates; the fixing mechanism for grid circular steels is started for adjusting the positions of the grid circular steels in the slide slots of the grid circular steel slide slot plates, so that the adjustment for the intervals of the grid circular steels can be realized. The corn threshing concave plate can adjust the intervals of the grid circular steels according to the variety and size of the corn, so that the crashed rate and loss rate of the corn can be reduced and the threshing effect of the corn can be promoted.

The invention relates to a safe natural gas hydrate rotating pressure maintaining coring device, which comprises an outer pipe assembly and an inner pipe assembly arranged in the outer pipe assembly,wherein a drill bit is arranged at the bottom end of the outer pipe assembly; the inner pipe assembly comprises an inner pipe assembly a and an inner pipe assembly b; the inner pipe assembly b is arranged in the inner pipe assembly a and can move in the axial direction of the inner pipe assembly a; the inner pipe assembly a comprises a fishing spear head, an elastic clamping mechanism, a piston pipe, a middle pipe nipple, a sealing nipple, an accumulator connecting pipe, a middle pipe and a pressure maintaining ball valve overturning sealing mechanism which are sequentially connected from topto bottom; the inner pipe assembly b comprises a lifting device, a connection mechanism, a spring clip suspension mechanism, a single action mechanism, an adapter, a regulating connector, an accumulator connection pipe, a sealing mechanism, a thermostatic instrument, a core pipe connection nipple and a core pipe. The safe rotating pressure-maintaining sampling device can be suitable for quaternarysedimentary strata and bedrock, and is more reliable in application.

The invention discloses an air-tightness joint with double female ends which comprises an inner conductor at the center, an insulating medium coaxially sleeved outside the inner conductor, and an outer conductor with a stepped hole type inner cavity. The insulating medium is arranged in the stepped hole of the outer conductor and is coaxially arranged together with the outer conductor; a fixing block is connected to an opening part of a stepped hole of the outer conductor in a close fit manner; the fixing block and the step surface of the stepped hole form axial limitation at two ends of the insulating medium. The air-tightness joint with double female ends has a simple structure, good air tightness, strong environment tolerance, reliable mechanical performances, excellent electric performances and high assembling efficiency, and is suitable for production on a large scale.

The invention provides a multifunctional drilling slip. The multifunctional drilling slip comprises a main body, a slip body, a balance beam, a lifting air cylinder and a first safety mechanism, wherein the lifting air cylinder, the slip body and the first safety mechanism are arranged in the main body, the piston rod end of the lifting air cylinder is connected with the balance beam, the balance beam is connected with the slip body through a connecting rod, the first safety mechanism comprises a safety base, a safety lever and a safety air cylinder, the safety base is fixedly arranged on the main body, the safety lever is rotationally arranged on the safety base, and the safety air cylinder is arranged at one end of the safety lever. The first safety mechanism can effectively prevent the phenomena of drilling jamming and pausing caused by the fact that in the drilling process, after air of the lifting air cylinder is cut off accidentally, single pneumatic locking fails and the slip body descends.

The invention discloses a clamp suitable for clamping an object with a circular through hole characteristic, and belongs to the technical field of special clamps. The clamp suitable for clamping the object with the circular through hole characteristic comprises a fixed plate; a rotary adjusting device is inserted to the fixed plate; a supporting frame is fixedly connected to the bottom end of the fixed plate; a claw-shaped internal expansion clamping device is connected to the supporting frame; the rotary adjusting device comprises a lifting rod; the outer side of the lifting rod is movably sleeved with a fixed sleeve; the top end of the fixed sleeve is fixedly connected with a check ring; the bottom of the fixed sleeve is sleeved with a sleeve cover; an inner sleeve is fixedly connected to the inner bottom face of the sleeve cover; a ratchet wheel clamping shaft is further sleeved into the inner sleeve; the bottom end of the ratchet wheel clamping shaft is fixedly connected with a fixed connecting rod; the bottom end of the fixed connecting rod is fixedly connected with a clamping ring; and the clamping ring is matched with the claw-shaped internal expansion clamping device. The problem that common design on the market is inconvenient to clamp objects with circular through hole characteristics is effectively solved.

The invention discloses a straw crushing machine. The straw crushing machine comprises a machine box, wherein a rotating shaft is arranged in the machine box, a plurality of mounting plates are arranged on the rotating shaft in the axial direction of the rotating shaft, a mounting seat with mounting holes is arranged at one end, far away from the rotating shaft, of each mounting plate, and one connecting shaft is mounted on the adjacent mounting seats through the corresponding mounting holes and rotationally connected with one cutter. According to the scheme, a new mechanical structure is adopted. The straw crushing machine has the advantages and effects as follows: in the striking and cutting-off processes of the cutters, straw is attached to the cutters so that the straw can be cut off by the cutters, the cutters rotate due to increase of stress and unload the straw, the cutters return to the original positions under the action of centrifugal force and can work normally, the stability of the machine is improved, and the machine is not easily damaged.

A combined detachable chair leg comprises a middle disc seat and five single-foot connecting seats, and the five single-foot connecting seats are connected to the circumference of the middle disc seatand are uniformly distributed in the circumferential direction; the upper surface of each single-foot connecting seat is provided with an avoiding inclined plane and a matching inclined plane I whichare sequentially connected from outside to inside; the combined detachable chair leg also comprises five overturning assembly single feet in one-to-one correspondence with the single-foot connectingseats; matched inclined planes II are arranged on the inner walls of the upper sides of the ends, close to the single-foot connecting seats, of the overturning assembly single feet; an inner axial locking structure is arranged between the end, close to the middle disc seat, of each single-foot connecting seat and the end, close to the single-foot connecting seat, of the corresponding overturning assembly single foot, and when the overturning assembly single feet overturn upwards to enable the matching inclined planes I to be matched with the matching inclined planes II, the overturning assembly single feet can be limited from moving towards the side of the middle disc seat excessively in the axial direction of the single-foot connecting seats by inner axial locking structure, and an outeraxial concave-convex locking structure for preventing the corresponding overturning assembly single foot from being separated outwards along the axial direction of the corresponding single-foot connecting seat is arranged between one end, far away from the middle disc seat, of the lower surface of each single foot connecting seat and the lower side edge of the corresponding overturning assembly single foot.

The invention proposes a hydraulic cylinder. The hydraulic cylinder comprises a cylinder body; two ends of the cylinder body are respectively a cylinder bottom and a cylinder head; a piston and a piston rod are arranged in the cylinder body; one end of the piston rod is fixed with the piston, and the other end of the piston rod extends out of the cylinder head; the cylinder body is divided into a rod cavity and a rodless cavity by the piston; the cylinder body is coated with a cylindrical fixed cylinder; the fixed cylinder has a circular cylinder bottom, and a cylindrical side wall arranged on the cylinder bottom; the cylinder bottom is positioned on the side of the cylinder head, and is rotationally connected with the piston rod for extending out of the cylinder head; the fixed cylinder can axially move along with the piston rod; multiple fixed grooves are formed in the cylinder bottom; a manipulator is arranged on the piston rod for extending out of the cylinder head, and can extend out to accommodate in the fixed grooves; and the outer wall of the cylinder body and the side wall are in threaded connection. Through interaction of threads, the hydraulic cylinder realizes axial fixation of the piston rod without continuously keeping the pressure of the rodless cavity, so that the energy consumption is reduced, and the service life of a hydraulic system is prolonged.

The invention provides an electric slip. The electric slip comprises a main body, a lifting electric cylinder, a balance beam, a slip body, a tooth plate carrier and a safety mechanism, wherein the lifting electric cylinder and the safety mechanism are arranged in the main body; the piston rod end of the lifting electric cylinder is connected with the balance beam; the balance beam is connected with the slip body through a connecting rod; the tooth plate carrier is detachably arranged on the slip body; the safety mechanism comprises a safety base, a safety lever and a safety electric cylinder; the safety base is fixedly arranged on the main body; the safety lever is rotatably arranged on the safety base; and the safety electric cylinder is arranged at one end of the safety lever. The electric slip solves the problem that various field pipelines are inevitably available by adopting a pneumatic or hydraulic control mode; and through locking arrangement on the slip body and the tooth plate carrier, the condition that a tooth plate is accidentally dropped possibly caused by misoperation is avoided, and the tooth plate carrier can be replaced more simply and conveniently by directly using an identifier.

The invention discloses an aluminum template with high use efficiency and relatively material saving. The aluminum template includes a plurality of template bodies, T-shaped inserting parts are fixedto one sides of the template bodies, and T-shaped grooves are formed in the other sides of the template bodies; every two adjacent template bodies are connected together through the cooperation of theT-shaped inserting parts and T-shaped grooves, the cooperation area of the T-shaped inserting parts and T-shaped grooves is relatively large, so that the connection between the corresponding templatebodies is more stable and tight, and meanwhile, the T-shaped inserting parts are provided with internal threaded holes; positioning plates are fixed to one ends of the T-shaped grooves, the radial direction of the connection positions of the template bodies is fixed, the bottom surfaces of the adjacent template bodies are positioned through the positioning plates, so that the bottom surfaces area same horizontal line, the overall structure is more stable, meanwhile, the installation and disassembly are simpler, the use efficiency is improved, and time cost is saved; and reinforcing devices are oppositely arranged on every two adjacent template bodies, the template bodies are axially fixed through the reinforcing devices, the connection of the template bodies is further reinforced, and the security of the connection of the template bodies is improved.

The present invention relates to a pingpong bat (1) comprising a bat plate (2) and a bat handle, wherein a gravity center deflection device for pingpong is arranged in the pad handle.