80results about How to "Large folding ratio" patented technology

The invention discloses a single-degree-of-freedom overconstrained shear-type deployable unit and space deployable mechanisms composed of the same. The single-degree-of-freedom overconstrained shear-type deployable unit comprises eight disc chucks, four sets of shear fork folding rods and eight sets of folding connecting rods; one set of the folding connecting rods limit the deployable degree of the basic deployable units by depending on the length of the connecting rods, the other seven sets of the folding connecting rods are all overconstrained connecting rods, and the overconstrained connecting rods can effectively improve the rigidity of the basic deployable units. Accordingly, the basic deployable units can be sequentially arranged in order, every two adjacent deployable units can form the first space deployable mechanism and the second space deployable mechanism by sharing four of the disc chucks and one set of the shear fork folding rods, and the length of the first space deployable mechanism and the size of the second space deployable mechanism can be changed by changing the quantity of the basic deployable units. The single-degree-of-freedom overconstrained shear-type deployable unit is simple in structure, has the high structural symmetry and is suitable for constructing an extendable space mast, a solar battery array support and a satellite plane reflecting antenna.

The invention relates to solar wings, in particular to a cubic unfoldable solar wing. One ends of a left protective plate and a right protective plate are separately connected with the two sides of a base through locking devices, and the other ends of the left protective plate and the right protective plate are connected with the two sides of an upper cap through hinges. A shear-fork type unfoldable solar cell mounting plate array comprises a plurality of units of the same structure. Each unit comprises a solar cell mounting plate, a supporting connecting rod and a solar cell which is mounted on the solar cell mounting plate. The two ends of each solar cell mounting plate are separately hinged to the adjacent solar cell mounting plates. The supporting connecting rods are hinged to the same sides of all the solar cell mounting plates. The two ends of each supporting connecting rod are separately hinged to the adjacent supporting connecting rods. The upper portion and the lower portion of the shear-fork type unfoldable solar cell mounting plate array are separately connected with the upper cap and the base through hinges. The cubic unfoldable solar wing is small in size, large in folding-unfolding ratio, novel in structure, flexible in control, high in reliability and large in number of the carried solar cells.

The invention discloses a radial repeatedly-folding/unfolding wheel mechanism. The adaptability of a current complex terrain motion detection vehicle to an unstructured terrain remains to be enhanced. A crank hub of the mechanism is fixed with one end of a movable wheel spoke connecting shaft; the other end of the movable wheel spoke connecting shaft is connected with an axial movable wheel spoke through threads; the crank hub is provided with crank push rods; the top end of each of the crank push rods is hinged to a rolling sleeve; the top end of each of axial movable wheel spoke rods is connected with an axial sliding groove in a wheel rim in a sliding way; the middle of each of the axial movable wheel spoke rods is fixed with a locking block; a wheel flange push rod sliding groove is formed in the locking block; two ends of the wheel flange push rod sliding groove are provided with two bumps; radial sliding grooves in the wheel rim are respectively connected with wheel flange push rods in the sliding way; a sleeve connecting rod is fixedly arranged on the bottom part of each of the wheel flange push rods; the top parts of the wheel flange push rods are respectively fixed with wheel flange inclined blocks; a shrinkage locking groove is formed in one side wall of each of the wheel flange push rods; an unfolding locking groove is formed in the other side wall of each of the wheel flange push rods. According to the radial repeatedly-folding/unfolding wheel mechanism, the wheel diameter and the wheel-ground contact way can be changed, so that the adaptability of the complex terrain motion detection vehicle to the unstructured terrain is improved.

A lifting device for mounting and maintaining an aero-engine is characterized by comprising lower guide rails, rollers, short rods, long rods, guy cables, upper guide rails, winding drums, motors, an engine, unfoldable mechanisms, scissors fork mechanisms and drive control mechanisms; the two lower guide rails, the rollers, the scissors fork mechanisms, the upper guide rails and the drive control mechanisms form the two independent unfoldable mechanisms together; the two independent unfoldable mechanisms are perpendicularly arranged at the front end and the back end of the engine; the lower guide rails are fixedly connected with the engine; the upper guide rails are fixedly connected with an airplane; the drive control mechanisms comprise the guy cables, the winding drums and the motors. The lifting device has the advantages that the folding ratio is large, the radial direction space between the engine and the airplane can be effectively utilized under a completely gathering condition, meanwhile accurate positioning can be formed with a main mounting part of the engine, and the quick mounting is facilitated; during the expansion process, the expansion is stable, the perturbation is small, and the device is not only suitable for the aero-engine, but also can be applied to a crane for industrial buildings and an escaping device for fire hazard.

The invention relates to a giant engineering tire forming drum which comprises wide drum tiles, narrow drum tiles, a drum tile expansion and contraction mechanism and a narrow drum shoulder contraction mechanism, wherein a narrow drum tile expansion and contraction mechanism is suspended on the inner sides of the narrow drum tiles, and is used for guiding narrow drum shoulders to be expanded and contracted in a direction forming a certain included angle with the axis of the forming drum; the narrow drum shoulders of every two adjacent narrow drum tiles have different amounts of contraction, and are arranged in different layers in a superimposed state; the drum tile expansion and contraction mechanism forms a triangular support to the wide and narrow drum tiles in an unfolded state. According to the giant engineering tire forming drum, the narrow drum shoulder contraction mechanism is contracted in the vicinity of a main connecting rod and an auxiliary connecting rod when being folded, so that a folding space can be fully utilized, and high folding ratio is ensured; the narrow drum shoulders are arranged in different layers in a folded state, and the phenomenon of lateral cutting of the narrow shoulder drums is avoided; the narrow drum shoulders are contracted towards the center of the forming drum along a guide rail forming a certain included angle with the axis of the forming drum, so that the phenomenon of tangent tire blank squeezing caused by the axial contraction of the drum shoulders is avoided, and the forming quality of a giant engineering tire is improved; the drum tile expansion mechanism forms the triangular support in an unfolded state, so that the rigidity of the forming drum is improved.

A space folding and extending mechanism with double cylinders as extensible units comprises an octagonal support base, three-degree-of-freedom hinges, bevel-edge rods, first gaskets, the first air-pressure cylinders, second gaskets and the second air-pressure cylinders. The octagonal support base is fixedly connected with the three-degree-of-freedom hinges, and the bevel-edge rods, the air-pressure cylinders and the gaskets are connected through revolute pairs. Under the conditions of vibration, collision and the like in the movement process of the mechanism, the gaskets can play a damping role, so that motion shock on the mechanism is low; the mechanism has a high structural symmetry so that different large-scale space folding and extending mechanism bodies can be formed by arranging theextensible units; the space folding and extending mechanism can be used in a space station, a communication satellite platform, a space telescope and other space missions, and has the advantages of being wide in application range and high in practicability.

The invention discloses a folding sliding plate bicycle. Existing bicycles are large in size and single in form. A folding rod positioning plate is fixed at a front end of a sliding plate, the bottom of the folding rod is hinged to the folding rod positioning plate, the middle part of the folding rod is fixed with the folding rod positioning plate through bolts, and the top of the folding rod is hinged to a front wheel mounting rod. The bottom of the front wheel mounting rod is hinged to a front wheel. The rear portion of the sliding plate is detachably connected with the bottom of a rear rod sleeve rod. The rear rod sleeve rod is hinged to a vehicle seat support rod, and a vehicle seat is fixed on the vehicle seat support rod. The vehicle seat support rod is hinged to a rear rod connecting rod through a vehicle seat pull rod. A rear rod is hinged to a front rod through a cross rod. A sliding plate support rod is fixed at the bottom of the sliding plate, and the sliding plate support rod and a sprocket-wheel case are both hinged to a rear wheel. A sprocket-wheel case positioning plate is fixed at the bottom of the sprocket-wheel case, and the sprocket-wheel case positioning plate and the sliding plate support rod are fixed through the bolts. The top of the sprocket-wheel case is hinged to pedal plates. The folding sliding plate bicycle can be used as a bicycle, and can also be used as a scooter, and is foldable and the folding ratio is high.

The invention provides an electric retractable type rocket prototype supporting mechanism. The invention relates to a vertically lifting repeatable carrier landing support mechanism, in order to solveproblems that in the prior art, the support circle diameter of the landing support mechanism is smaller, the air resistance of rocket launching is too large, and first-order vibration of support connecting rods in the landing process can easily lead to the failure of recovery work. The mechanism includes a drive component and a plurality of support legs. The support legs are uniformly arranged around the bottom of a main body. The tops of the support legs are rotatably connected with and installed on the side wall of the main body, the support connecting rods of the support legs are connectedwith the support legs through buffers, the tops of the support connecting rods of the support legs and the bottoms of support connecting rods of the main body of a rocket are rotatably connected withone end of a drive connecting rod through hinge pins, the other end of the drive connecting rod is rotatably connected with a drive component, and the tops of the support connecting rods of the mainbody of the rocket are rotatably connected with the main body. The mechanism is used for the field of landing support mechanisms.

The invention relates to a single-degree-of-freedom paraboloid type foldable and unfoldable array, which is designed on the basis of a rigid thick plate paper-cut theory. The array comprises a rigid thick plate and a spring driving hinge; the rigid thick plate is provided with a special molded surface, and the spring driving hinge is arranged at the crease of a basic folding and unfolding unit; the surface appearance and the side face of the rigid thick plate are treated in a material adding and cutting mode so as to meet the self-locking and profile requirements. According to the single-degree-of-freedom paraboloid type foldable and unfoldable array, the array is driven to be freely folded and unfolded by means of the elastic force of the spring, is folded into a small size in a non-working state and is unfolded to a preset working position in a working state, and the single-degree-of-freedom paraboloid type foldable and unfoldable array has the advantages of single degree of freedom,stable structure, large folding and unfolding ratio, high profile precision and the like.

The invention discloses a folding and unfolding mechanism with two slider and spring combined and restricted telescopic rods. The folding and unfolding mechanism comprises an octagonal support, three-degree-of-freedom hinges and foldable units, wherein the octagonal support is fixedly connected with the three-degree-of-freedom hinges; the foldable unit comprises an inclined side rod, a first gasket, two slider and spring combined and restricted telescopic rods and a second gasket; the octagonal support is connected with the foldable units through the three-degree-of-freedom hinges; and the inclined side rod, the slider and spring combined and restricted telescopic rods and the gaskets are connected through revolute pairs. Through folding twice, the space folding of the mechanism can be realized, and the folding ratio is large; and moreover, the mechanism has the characteristics of light weight, high precision, high rigidity and high strength, can be applied to the fields of space exploration, earth observation and mobile communication, and is extremely high in adaptability and practicability.

The invention provides a foldable and bendable space truss capturing device. The foldable and bendable space truss capturing device comprises a substrate and a plurality of capturing mechanical paws,wherein each capturing mechanical paw comprises a plurality of folding and bending units which are connected in sequence; each folding and bending unit comprises two support frames; each support frameis provided with a frame side edge and a hinged seat arranged in the direction vertical to the frame side edge slidably; the two frame side edges in the same folding and bending unit are parallel toeach other, and one frame side edge can move relative to the other frame side edge; the two frame side edges in the same folding and bending unit are connected through a capturing mechanism, and the two hinged seats are connected through a driving branch chain arranged on the plane where the two frame side edges are arranged vertically; a plurality of folding and driving units are mounted on eachsupport frame, and drive the corresponding hinged seat to slide respectively, so that the relative positions of the two frame side edges in the same folding and bending unit change. The foldable and bendable space truss capturing device has the advantages of large bending motion space, good capturing adaptability and high integral structure rigidity.

The invention provides a sensitive plant simulating variable topology folding and unfolding mechanism employing rigidity hinge connection. An upper layer and a lower layer of a rotary machine base ofthe folding and unfolding mechanism are corresponding to four pin roll bases. One end of each support rod is connected to a pin roll base through a pin roll and two sides of each support rod are connected with four-rod mechanisms through the pin rolls. Each four-rod mechanism includes a drive rod, a connection rod and a frame connecting rod. One end of each drive rod is connected with the corresponding support rod through a pin roll while the other end is connected with the corresponding connection rod through a pin roll. One end of each connection rod is connected with the corresponding driverod through a pin while the other end is connected with the frame connecting rod through a pin roll. One end of the frame connecting rod is connected with the corresponding rod through a pin roll while the other end is connected with the corresponding support rod through a pin roll. One end of each rigidity hinge is connected with a corresponding foldable module while the other end is connected with another foldable module. According to the invention, through movement of the rotary machine base, different modules are formed, so that requirements of different spaceflight working can be met. Besides, the mechanism provided by the invention has characteristics of low weight, large folding ratio, simple structure, simple folding and unfolding process, high stability, high reliability, high rigidity, low manufacture cost and good promotion application effect.

The invention discloses a planetary-gear-train-type folding and unfolding device and a folding and unfolding method thereof. The majority of spacecraft folding and unfolding mechanisms only have one-stage unfolding and lack locking devices, the folding ratio is small, and the transmission efficiency is low. The planetary-gear-train-type folding and unfolding device comprises a rotary mechanism, an overturn plate, a folding and unfolding assembly, a planetary-gear-train transmission mechanism, a gear driving piece and a static plate. The rotary mechanism comprises a fixing plate, a connecting plate and a first motor. The planetary-gear-train transmission mechanism comprises a fan-shaped inner gear, a planetary gear, a sun gear, a first support, a second support and a planetary frame. The folding and unfolding assembly comprises a first connecting rod, a second connecting rod, a first sliding block, a second sliding block and (2n+1) supporting frames. The (2n+1) supporting frames are sequentially arranged, and the inner ends of every two adjacent supporting frames are hinged. According to the planetary-gear-train-type folding and unfolding device, the folding ratio is large, thin-film solar cells on the supporting frames are utilized to control the unfolding angles, and high accuracy and stability are achieved.

The invention relates to a rigid hinge connecting variable-topology folding and unfolding mechanism with a crank block as a folding and unfolding unit. The rigid hinge connecting variable-topology folding and unfolding mechanism comprises unfoldable modules and a rigid hinge, each unfoldable module comprises a rotating machine base, a stretchable arm and a crank block mechanism, the upper and lower layers of the rotating machine bases correspond to four hinge bases, one ends of the stretchable arms are connected with the hinge bases through hinges, and the two sides of the stretchable arms areconnected with the crank block mechanism through hinges; each crank block mechanism comprises a driving rod, a transmission rod and a sliding block, wherein the driving rod, the transmission rod andthe sliding block are connected through a rotation pair, and the sliding block is embedded on the stretchable arm; and the rigid hinge is used for connecting the two unfoldable modules, and the two unfoldable modules can rotate relatively through a middle rotation pair of the rigid hinge. The rigid hinge connecting variable-topology folding and unfolding mechanism has the beneficial effects that repeated folding is achieved, the folding ratio is large, the folding process is simple, the driving manner is simple, the rigidity is large, the stability is high, and the reliability is good.

The invention discloses a single-degree-of-freedom full-symmetric deployable structure which is formed by connecting a spring driving hinge and a single-degree-of-freedom full-symmetric deployable structure, the spring driving hinge is mounted at a connecting joint of the single-degree-of-freedom full-symmetric deployable structure, and a deployable array is elastically driven by a spring to unfold. The full-symmetric deployable array is designed on the basis of the rigid thick plate paper-cut theory, so that the deployable array has a larger folding-unfolding ratio and can be infinitely expanded to obtain a larger working area, the deployable array can be folded into a smaller volume in a non-working stage so as to be convenient to transport, and the deployable array is unfolded to an expected working position in a working stage so as to be convenient to transport. And the deployable array has a single degree of freedom, automatic unfolding of the deployable array can be realized through the elastic force of the springs, and self-locking after unfolding can be realized through interference between joints of the plate surface, so that the folding reliability is improved.