Multi-purpose Rotating Locking Chain and a Positioning and Storage Device for a Series of Rotating Locking Chains

Abstract

The present invention relates to a multi-purpose rotary locking chain in which a locking function is realized within the connecting ends of two connected chain blocks. By manually axially displacing a movable locking shaft disposed inside two connected chain blocks, the functions of rotation and locking of the two connected chain blocks within a specified angular range are realized. By setting the non-circular cross-sectional shapes of the movable locking shaft and the locking shaft hole, the functions of locking and unlocking between the two connected chain blocks at different locking angles are realized. By setting a certain angle between the rotation axes of the adjacent connecting ends of the series-connected rotary locking chain, the relative rotation direction between the connected chain blocks is adjusted. The rotary locking chain of the present invention can be widely applied to fields such as daily necessities, industry, transportation, and engineering construction.

Description

Technical Field

[0001] The present invention relates to the technical field of locking, and particularly relates to a multi-purpose rotary locking chain and a positioning and storage device including the rotary locking chain. Background Art

[0002] In the prior art, common products or accessories involving rotary locking functions are generally rotatably connected between two accessories through a round shaft and then locked using the principle of triangular fixation, such as folding tables, folding armrests, folding racks, windows, doors, etc.; some products or accessories with rotary locking functions are locked using other additional accessories, such as door stoppers, door bolts, etc.; these locking accessories are exposed outside the product, which not only greatly affects the overall aesthetics, but also occupies space and even hinders the normal use of the product; for example, in the prior art, when certain products or accessories cannot be unfolded or retracted in a straight line, they are combined by inserting hollow tubes of different thicknesses and expanded and contracted in a straight telescopic manner, such as the pull rod on a luggage case. Since there are too many hollow rod sections, the overall thickness of the pull rod is uneven, and the gap between the outer tube and the inner tube is difficult to effectively control, easily resulting in a swinging phenomenon during use; furthermore, because the thickest hollow rod spans the body of the luggage case, the internal usable space is reduced, the function of folding the body is lost, and the reasonable placement of luggage items is hindered. In addition, products involving rotary locking mechanisms are widespread in various fields such as industry, transportation, medical, artificial intelligence, etc., such as robotic arms, robotic claws, medical robots, industrial robots, automatic doors, seat backs, surgical robots, and humanoid robot joints, etc. In the prior art, rotation is carried out using methods such as gear transmission, worm and worm gear transmission, belt transmission, or chain transmission, and then locked using other accessories. Due to disadvantages such as the complexity of its structure, high manufacturing cost, and large volume, its scope of use is limited. Especially for some products or accessories with special limitations on volume and shape, it is very difficult to be used, such as surgical robot hands, humanoid robot fingers, small robotic insects, etc. Summary of the Invention

[0003] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and fill the gaps in the prior art.

[0004] The specific technical problems to be solved are as follows: realizing the relative rotation of two connected chain blocks within a set angle range through the axial displacement of the movable locking shaft, and accurately positioning and locking them at a specified angular position, thus making up for the defects in the prior art where a circular shaft is used for rotational connection and then other complex locking devices are used for positioning and locking. It also solves the defects of some products or accessories that cannot be rotated and locked using the prior art, by using hollow tubes of different thicknesses to telescopically connect in an insertion and movable manner. The multi-purpose rotary locking chain of the present invention can also more efficiently replace some products or accessories that use complex gear drives, worm and worm gear drives, belt drives, or chain drives, etc. for rotation and then use other accessories to lock them. The present invention can be widely applied to a variety of different fields.

[0005] In the present invention, the "head of the movable locking shaft" refers to the axial end of the movable locking shaft in its locking direction; the "tail of the movable locking shaft" refers to the axial end of the movable locking shaft in its unlocking direction; the "series-connected chain block" refers to the chain block in the series rotary locking chain; the "parallel-connected chain block" refers to a chain block with two or more connecting ends, where the limit bolts inserted through each connecting end are not on the same straight line; the "limit unlocking position" refers to the position where the limit groove releases the limit boss.

[0006] The parts where the movable locking shaft, chain block, and internal accessories on the rotary locking chain of the present invention are in movable contact are all made of rigid metal or non-metal materials to ensure the normal operation of the rotating mechanism. The overall shape of the chain block on the rotary locking chain of the present invention is not limited, such as block-shaped, strip-shaped, sheet-shaped, column-shaped, or determined according to the shape of the product or accessory.

[0007] The multi-purpose rotary locking chain proposed by the present invention includes at least two chain blocks, a movable locking shaft, and a limiting device. Locking shaft holes with non-circular cross-section segments are provided in two connected ends between the chain blocks, and a movable locking shaft with a non-circular cross-section segment that matches it is inserted into the locking shaft holes. When the movable locking shaft is simultaneously embedded and locked with the inner walls of the locking shaft holes in the two connected ends under the action of the limiting device, the two connected ends are locked; when the movable locking shaft is subjected to a force and moves in its unlocking direction to an unlocking position where at least one of the chain blocks can freely rotate within a specified angle range, the two connected ends are unlocked. In some preferred embodiments, the non-circular cross-section is an axisymmetric figure with more than three axes of symmetry, such as a regular polygon, a concave polygon, a tooth shape, or a petal shape, etc.

[0008] In some embodiments, the two connected end portions are respectively a movable end portion and a coupling shaft end portion, wherein at least one of the connecting end portions is provided with a through groove, and the locking shaft hole is perpendicular to both sides of the through groove; the two connected end portions are inserted and connected to each other; the coupling shaft end portion and the movable locking shaft are integrally connected in a non-rotatable manner. The locking shaft hole penetrates through the two connected end portions; a cylindrical boss is provided on the end face of the head of the movable locking shaft, which protrudes above the side surface of the chain block in the locked state, so as to facilitate unlocking the two connected end portions manually. In some embodiments, in the locked state, the cylindrical boss slides against the inner wall of the locking shaft hole, aiming to prevent the movable locking shaft from colliding with the wall of the locking shaft hole due to rotational creep in the locking shaft hole, resulting in wear of the contact surface. In some embodiments, the chain blocks are connected in series with each other, or each connecting end portion on the parallel chain blocks is connected with the chain block or the series rotating locking chain. In some embodiments, the rotation axes between two adjacent connecting end portions are parallel to each other or form a certain angle; in some such embodiments, the rotation axes of two adjacent connecting end portions are perpendicular to each other, so as to make the planes where the relative rotation trajectories of two spaced chain blocks are located perpendicular to each other.

[0009] In some embodiments, when two connected chain blocks cannot be relatively rotated to a certain expected angle, such as when it is necessary to rotate two connected chain blocks to a relatively parallel position, an intermediate chain block with a shape and length matching can be connected therebetween to achieve this with the help of two spaced chain blocks.

[0010] In some embodiments, the movable locking shaft and the locking shaft hole are integrally stepped, and each non-circular cross-sectional stepped section has a tapered surface for nested fit, and the non-circular cross-section of each stepped section is an axisymmetric figure with more than three axes of symmetry; among two adjacent stepped sections, the maximum non-circular cross-sectional area of the stepped section closer to the locking direction of the movable locking shaft is less than or equal to the minimum non-circular cross-sectional area of the other stepped section.

[0011] In some embodiments, the movable locking shaft is axially movably limited by the limiting spring; in the locked state, the movable locking shaft is locked by being embedded with the inner walls of the locking shaft holes at the two connected ends through the limiting spring. In some embodiments, a pre-tightening spring is provided between the two connected ends, and a matching movable gap is provided between the axial side surface of the movable end and the side surface of the connected shaft end opposite thereto; the pre-tightening spring is arranged in one of the gaps that can make the movable end move relative to the connected shaft end in the unlocking direction of the movable locking shaft and lock with the movable locking shaft; the axial acting force applied by the limiting spring to the movable locking shaft is greater than the reverse acting force applied by the connected shaft end to the movable locking shaft through the pre-tightening spring. Additionally, as the number of uses increases, even if the locking shaft hole expands due to wear between the movable locking shaft and the corresponding inner wall of the locking shaft hole, these slightly tapered movable locking shafts and the inner wall of the locking shaft hole, under the action of the pressure of the limiting spring and the pre-tightening spring, still maintain a tight fit and locking with the inner wall of the locking shaft hole in the locked state after the movable locking shaft is displaced in its locking direction; in some embodiments, a groove for fitting the pre-tightening spring to be embedded is provided on one side surface of the pre-tightening spring gap, one end of the pre-tightening spring presses against the bottom of the groove, and the other end presses against the other side surface of the gap; in some embodiments, the taper of the non-circular cross-section stepped section satisfies that when the movable end rotates relative to the movable locking shaft, the side wall of the movable locking shaft is pressed by the inner wall of the locking shaft hole within a specified spinning pressure range to overcome the acting force of the limiting device, forcing the movable locking shaft to move to the unlocking position.

[0012] In some embodiments, a stop boss is radially provided on the side wall of the movable locking shaft; a stop boss groove that cooperates with the stop boss is provided on the wall of the locking shaft hole corresponding to the stop boss at the angle to be locked; when the movable locking shaft moves from the locking position to the unlocking position, the stop boss moves from one end of the stop boss groove to the other end that does not interfere with the rotation of the movable end, and during the rotation, the stop boss presses against the axial side wall of the stepped section of the locking shaft hole of the movable end under the action of the limiting spring force until the movable end rotates to the set locking angle position and slides into the stop boss groove, that is, the movable locking shaft moves to the locking position, so that the movable locking shaft and the movable end can smoothly bypass the unnecessary locking angle positions during the relative rotation. In some embodiments, a locking is set at a certain specified included angle position between two adjacent link blocks to realize the locking arrangement of each link block on the same specified arc; in some embodiments, the rotation axes of the connecting ends on the parallel link blocks are on the same straight line, the locking directions of the movable locking shafts inserted into the respective connecting ends are the same, and the ends of the respective movable locking shafts are connected by a connecting rod; when the connecting rod moves from the locking state position to the unlocking position in the unlocking direction, each movable locking shaft is simultaneously driven by the connecting rod to move from the locking position to the unlocking position.

[0013] In some embodiments, in the two connected ends, through grooves are provided on both sides of the movable end; a link block limiting bolt hole and a locking shaft limiting bolt hole that communicate with each other are simultaneously provided through the connecting shaft end and the radial sides of the movable locking shaft, and the limiting bolt is inserted into the locking shaft limiting bolt hole and the link block limiting bolt hole that is axially positioned therewith; the locking shaft limiting bolt hole is axially widened in the locking direction of the movable locking shaft to make the movable distance between the opposite sides of the limiting bolt greater than or equal to the effective movement distance of the axial movement of the movable locking shaft from the unlocking position to the locking position. In some embodiments, on the series rotation locking chain, the link blocks containing two connecting ends are spaced and connected by the link blocks without the connecting shaft end and the link blocks without the movable end; or on the series rotation locking chain, the link blocks containing two connecting ends contain both the connecting shaft end and the movable end. In some embodiments, the limiting bolt is not inserted into the link block without the connecting shaft end.

[0014] In some embodiments, an end cap is provided on one side of the link block in the unlocking direction of the movable locking shaft, and a hollow column that is movably matched with the tail section of the movable locking shaft is provided on the end cap; in the locked state, the distance from the bottom wall of the hollow column to the end face of the tail of the movable locking shaft is greater than or equal to the effective movement distance; the limiting spring is arranged between the tail of the movable locking shaft and the bottom wall of the hollow column, one end of the limiting spring presses against the bottom wall of the hollow column, and the other end presses against the tail of the movable locking shaft.

[0015] In some embodiments, a limiting spring hole extending along the locking direction of the movable locking shaft is provided in the inner wall of the locking shaft limiting bolt hole; the limiting spring is arranged in the limiting spring hole, one end of which abuts against the bottom wall of the limiting spring hole, and the other end directly or indirectly abuts against the limiting bolt.

[0016] In some embodiments, the limiting bolt hole penetrates through both ends of a series of chain blocks including two connecting ends; the limit switch is connected to the end of the limiting bolt passing through the first section of the series of chain blocks in its reset direction; a limiting boss axially extending in the unlocking direction of the movable locking shaft is provided on the inner wall of the movable locking shaft limiting bolt hole, and a release groove for the limiting bolt to release the limiting boss at the limiting unlocking position is axially provided on one side of the limiting bolt facing the limiting boss; the limiting bolt is movably and limit-connected to the corresponding chain block through a reset spring arranged in the limiting bolt hole; in the initial state of the rotary locking chain, each connecting end is in a locked state, and the limiting bolts passing through the series of chain blocks connected to each other are in a mutually abutting reset state; when the limit switch is pressed to the position where the reset spring is compressed, each limiting bolt moves to the limiting unlocking position.

[0017] In some embodiments, the limiting block functions to limit the reset spring.

[0018] In some embodiments, the end face of the limit bolt in the reset direction of the reset spring is an arc surface, and the limit bolts inserted through two adjacent link blocks are in initial states with various different included angles. That is, in these embodiments, in the initial state of the rotary locking chain, two adjacent link blocks can be in positions with various different included angles. In some embodiments, the limit bolt is movably inserted through the limit bolt hole in a butt-joint manner by two split fittings with limit flanges; concave surfaces matching the limit flanges are provided at both ends of the link block; a second hole is provided on the inner wall of one end of the limit bolt hole in the reset direction of the reset spring; the reset spring is sleeved on the limit bolt, one end of which presses against the limit flange, and the other end presses against the bottom wall of the second hole; the limit bolt is movably limited by the concave surfaces at both ends of the link block. In some embodiments, a limit block is provided between the limit bolt and the limit spring, one end of the limit block presses against the limit spring, and the other end presses against the limit bolt under the action of the pressure of the limit spring. In some embodiments, the limit block always presses against the side wall of the limit bolt at a position closer to the reset direction of the limit bolt relative to the limit groove; the limit block is slidably matched with the inner wall of the corresponding limit spring hole on both sides in the moving direction of the limit bolt, so as to prevent the limit bolt from rubbing against the limit spring during movement to generate noise, or prevent the reset spring from deforming due to interference with the limit bolt. In some embodiments, an integral limit bolt is provided in the link block with a coupling shaft end, a limit flange is provided at one end of the limit bolt in the reset direction of the reset spring, a concave surface matching the limit flange is provided at one end of the link block corresponding to the limit flange, a limit block boss is axially provided at one end of the limit block facing the unlocking direction of the movable locking shaft, and a boss groove communicating with the release groove is provided along the reset direction inside the release groove; during the movement of the limit bolt, the limit block boss slides and abuts against the bottom surfaces of the release groove and the boss groove. One end of the reset spring presses against the side wall of the boss groove in the reset direction of the limit bolt, and the other end presses against the limit block boss; one end of the limit bolt is limited by the concave surface of the link block end, and the other end is limited by the limit block boss; in some of these embodiments, the mutually connected link blocks are connected at intervals by link blocks with coupling shaft ends at both connection ends and link blocks with movable ends at both connection ends. Among them, the connection mode between the link block with movable ends at both connection ends and the limit bolt passing through both ends of the link block is the same as that described above, that is, the limit bolt passing through both ends of the link block is formed by butt-jointing two split fittings and has limit flanges at both ends, and the limit bolt is movably limited by the concave surfaces at both ends of the link block; the limit bolt inserted through the link block with a coupling shaft end at the connection end is of an integral structure, and its connection mode is the same as the above-described mode, that is, one end of the integral limit bolt is movably limited by the concave surface of the link block end, and the other end is movably limited by the limit block boss.

[0019] In some embodiments, a locking chamfered groove is provided at a position of the limit bolt that abuts against the limit spring. The limit spring presses against the inclined surface of the locking chamfered groove, so that the limit bolt is positioned in the limit bolt hole in a state of being obliquely pressed, thereby preventing the limit bolt from disengaging from the limit bolt hole. In some embodiments, the limit bolt is a limit bolt to prevent the limit bolt from disengaging from the limit bolt hole.

[0020] In some embodiments, the rotation axes of the connecting ends on the parallel link blocks are on the same straight line, and the ends of the movable locking shafts passing through the connecting ends are connected by a connecting rod; when the connecting rod moves from the locking position of the movable locking shaft to the unlocking position, each of the movable locking shafts simultaneously moves from the locking position to the unlocking position under the drive of the connecting rod.

[0021] In some embodiments, a support shaft hole is provided in the connecting end portion and the movable portion; a support shaft fixedly connected to the connecting end portion and rotatably connected to the movable end portion is provided in the support shaft hole; both ends of the support shaft penetrate through a support shaft locking shaft hole including a locking shaft hole in the connecting end portion and a partial locking shaft hole section in the movable end portion; a support shaft limit bolt hole is provided on the support shaft, and the support shaft is axially positioned with the connecting end portion through the limit bolt, and the two connected end portions and the movable locking shaft are positioned by the support shaft to avoid stress interference with the rotational movement.

[0022] In some embodiments, a return torsion spring is provided in the connecting end portion. The return torsion spring is sleeved on the movable locking shaft or the support shaft, and one end of it is clamped on the movable end portion, and the other end is clamped on the connecting end portion or the support shaft axially fixed to the connecting end portion.

[0023] The present invention also relates to a positioning and storage device for a series of rotating locking chains, including a locking shaft unlocking device and a storage body. The storage cavity of the storage body contains a storage channel, and the storage channel includes a straight storage channel section with a storage opening; the locking shaft unlocking device is arranged on one side of the locking direction of the movable locking shaft at this position on the storage channel; with the cooperation of the locking shaft unlocking device, the series of rotating locking chains can slide smoothly in the storage channel.

[0024] In some embodiments, the locking shaft unlocking device includes an unlocking key and an unlocking spring; on the storage channel, an unlocking groove is provided at a position opposite to the end face of the head of the movable locking shaft corresponding to the chain block during turning; the unlocking key is arranged in the unlocking groove, one end of the unlocking spring pushes against the unlocking key, and the other end thereof presses against the bottom of the unlocking groove; when the chain block turns, the unlocking key pushes against the end face of the head of the movable locking shaft under the pressure of the unlocking spring, forcing the movable locking shaft to move to the unlocking position. The number of the unlocking keys is sufficient to simultaneously unlock the movable locking shaft corresponding to any chain block during turning. In some embodiments, the storage body is a storage box, and the storage cavity in the storage box includes a straight storage channel section connecting the storage opening and a spiral storage channel section; the unlocking key is arranged on the side wall opposite to the axial end face of the movable locking shaft corresponding to the turning position of the chain block on the straight storage channel in its locking direction. During the movement of the chain block on the series rotation locking chain in the spiral channel, the angle of relative rotation between the movable end of each connecting end and the movable locking shaft is less than the first locking angle, that is, the connecting end of the chain block moving in the spiral channel always remains in the unlocked state.

[0025] In some embodiments, the locking shaft unlocking device is an actuating inclined plane; in the locked state, the distance from the end face of the cylindrical boss to the chain block is greater than or equal to the effective moving distance; during the storage process, when the edge of the end face of the cylindrical boss touches the actuating inclined plane, the reaction force of the actuating inclined plane forces the movable locking shaft to move to the unlocking position.

[0026] In some embodiments, when the movable locking shaft in the locked position turns in the storage channel, the edge of its cylindrical boss touches the actuating inclined plane, so that the movable locking shaft is forced to move to the unlocking position under the reaction force of the actuating inclined plane; in some embodiments, the actuating inclined plane is arranged on the storage opening, and the cylindrical boss on the movable locking shaft in the unlocked position always presses against the storage channel wall, so that the chain block is always in the unlocked state during the movement on the storage channel.

[0027] The lockhole that is formed on the two ends of the sprocket wheel is formed in then the second sprocket wheel, and the second sprocket wheel is in the second sprocket wheel, and the second sprocket wheel is in the third sprocket wheel, and the sprocket wheel is in the third sprocket wheel, and the sprocket wheel is in the fourth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket wheel is in the fifth sprocket wheel, and the sprocket In a practical embodiment, the edges of the two unlocking block ends located in the direction of the positioning hole and the two positioning block ends facing the positioning hole are rounded.

[0028] The lock member is a pair of locks which are connected by a threaded cantilever shaped, and the two lock members are connected by a threaded cantilever shaped, and the two lock members have the function of being a locking sprocket and a slave. The driven inclined surface on the stripping block presses against the edge of the anti-stripping hole, so that the anti-stripping block is driven to move out of the anti-stripping block hole; an unlocking button and a button reset spring are movably provided in the two anti-stripping holes, and the button reset spring is sleeved on the unlocking button; when the two unlocking buttons are manually pressed and pushed from the anti-stripping holes into the two anti-stripping block holes, the tandem rotary locking chain can be completely taken out of the storage device; an ejection device is provided at the end of the storage channel, and when the tandem rotary locking chain is completely received in the storage channel, the ejection device keeps applying pressure to the end of the tandem rotary locking chain, so that the tandem rotary locking chain pops out a small section of the storage opening after being positioned and unlocked, so as to facilitate manual removal.

[0029] 1. The locking function of the rotary locking chain of the present invention is realized in two connected connecting ends, and has the characteristics of simplicity, beauty, safety and stability, long service life, and easy replacement of accessories. It has great economic value and use value, and can be widely used in some products or accessories with special requirements for appearance and structure.

[0030] 2. The rotating locking chain of the present invention realizes the functions of locking and unlocking between two connected chain blocks at different locking angles by setting the non-circular cross-sectional shapes of the movable locking shaft and the locking shaft hole. By radially providing a stop boss on the side wall of the movable locking shaft and providing a stop boss groove on the corresponding locking shaft hole wall for the stop boss to move at the locking angle position to be locked, the movable locking shaft and the movable end can smoothly bypass the unnecessary locking angle positions during the relative rotation process.

[0031] 3. By setting a certain angle between the rotation axes of the connected connection ends of the series-connected rotating locking chain, the relative rotation direction between the connected chain blocks is adjusted.

[0032] 4. When two connected chain blocks cannot be relatively rotated to a certain expected angle, such as when it is necessary to rotate two connected chain blocks to a relatively parallel position, an intermediate chain block with a matching shape and length can be connected between them to achieve this with the help of the two spaced-connected chain blocks.

[0033] 5. The rotating locking chain of the present invention has characteristics such as a compact structure, high strength at the locking part, few used accessories, and low manufacturing cost, and can be widely applied to products or accessories with special requirements for shape, size, and performance.

[0034] 6. According to the settings of the shape and size of the chain blocks, it can be widely applied to products or accessories in various fields. For example, rotating rods, selfie sticks, rotating plates, rotating racks, rotating table legs, folding bicycles, wheels with locking functions (such as brake wheels), and replacing the drawbars or handles on suitcases or trolleys, etc. The multi-purpose rotating locking chain of the present invention can replace some tubular telescopic rods to fold the whole suitcase, greatly reducing the storage space, being easy to store, and being able to bend and lock the multi-purpose rotating locking chain during use to adjust the direction or curvature. Even it can be realized to draw out the rotating locking chain from the box body for other uses; Similarly, the multi-purpose rotating locking chain of the present invention can also replace the armrest on the trolley, and can realize the functions of rotating and unfolding and storing the armrest, and even can realize the function of rotating and folding the body of the trolley, effectively reducing the volume of the whole trolley and reducing the storage space; The rotating locking chain of the present invention can also be applied to wheels with locking functions to lock the rotation of the wheel axle. The multi-purpose rotating locking chain of the present invention is used to replace the hinges and hinges on doors and windows to realize the function of positioning and locking doors and windows without using other auxiliary locking accessories, and avoid the risk of being pinched by hand at the rotating part and increase the rotation angle range. The rotating locking chain of the present invention can be applied to the field of bridge construction, such as the rapid paving of the bridge deck or the telescopic bridge; In addition, the rotating locking chain of the present invention can be loaded with a driving device at the connecting end to realize the functions of automatic rotation and locking, and can be widely applied to various fields such as robotic arms, robotic claws, robots, and medical devices.

[0035] 7. The positioning and storage device of a multi-purpose series rotating locking chain of the present invention can effectively store a single series rotating locking chain and fix it after unfolding, such as for drawbars, push rods, telescopic armrests, etc.

[0036] The following further describes the present invention with reference to the accompanying drawings. Description of the Drawings

[0037] Figure 1 is a schematic perspective view of a multi-purpose series rotating locking chain in an initial state according to the first embodiment.

[0038] Figure 2 is an exploded view of a multi-purpose series rotating locking chain according to the first embodiment.

[0039] Figure 3 is a partial sectional view of a multi-purpose series rotating locking chain according to the first embodiment.

[0040] Figure 4 shows that an installation flange is provided at the end of the last link block of the series rotating locking chain in the first embodiment.

[0041] Figure 5 is a partial sectional view of the reset spring sleeved on the limit bolt at the limit unlocking position in the series rotating locking chain.

[0042] Figure 6 is a schematic exploded view of the structure among the limit bolt, return spring, limit spring and limit block in Figure 5.

[0043] Figure 7 is a main cross-sectional view of the overall structure of a multi-purpose series rotary locking chain according to the fourth embodiment.

[0044] Figure 8 is a schematic structural view of the movable locking shaft in Figure 7.

[0045] Figure 9 is a schematic view of the overall structure of the combination of a multi-purpose series rotary locking chain and a positioning and storage device according to the fifth embodiment.

[0046] Figure 10 is a schematic exploded view of the combination of a multi-purpose series rotary locking chain and a positioning and storage device according to the fifth embodiment.

[0047] Figure 11 is a schematic exploded view of the structure among the chain block, handle, movable locking shaft and other accessories in the fifth embodiment.

[0048] Figure 12 is a schematic view of the structure between the limit bolt and the unlocking block in the chain block with both connecting ends being movable ends in the fifth embodiment.

[0049] Figure 13 is an axial cross-sectional view of the straight storage channel when the return spring is in a compressed state in the fifth embodiment.

[0050] Figure 14 is a radial cross-sectional view of the straight storage channel when the return spring is in a compressed state in the fifth embodiment.

[0051] Figure 15 is a schematic view of the structure between the two anti-disengagement blocks and the anti-disengagement spring in the fifth embodiment.

[0052] Figure 16 shows an axial cross-sectional view of the straight storage channel in the schematic structural view of the sixth embodiment.

[0053] Figure 17 shows that in the seventh embodiment, a chain block with the rotational axes of its two connecting shaft ends being perpendicular to each other is connected between two spaced chain blocks.

[0054] Figure 18 is a schematic exploded view of the structure among the movable locking shaft, chain block, limit spring and end cap in the eighth embodiment.

[0055] Figure 19 is a schematic view of the structure in the ninth embodiment where the two connecting ends of the parallel chain block are respectively connected with series rotary locking chains.

[0056] Figure 20 is a schematic exploded view of the parallel chain block and its internal accessories in Figure 19.

[0057] Figure 21 is a schematic view of the overall structure in the tenth embodiment where each of the three connecting shaft ends of the parallel chain block is connected with a chain block having only one movable end.

[0058] Figure 22 is an exploded view of Figure 21.

[0059] Figure 23 is a sectional view of one of the connecting ends on the parallel link block in the tenth embodiment.

[0060] Figure 24 is a schematic exploded view of one of the connecting ends on the parallel link block in the tenth embodiment. Detailed implementation manners

[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described below are only used to explain the present invention and do not constitute a limitation to the present invention.

[0062] Embodiment 1: A multi-purpose rotary locking chain as shown in Figures 1-3 includes a movable locking shaft 1, a first link block 2a, a link block 2b with both a movable end and a coupling end, a last link block 2c, a limit switch 3, a limit bolt 4, a return spring 5, a limit block 6, a limit spring 7, and a dust cover 10. In this embodiment, the movable locking shaft and the locking shaft hole are integrally stepped, and each stepped section is in the shape of a regular octagonal prism. Among two adjacent stepped sections, the maximum non-circular cross-sectional area of the stepped section closer to the head of the movable locking shaft is less than or equal to the minimum non-circular cross-sectional area of the other stepped section; among two adjacent ends, both sides of the coupling end are closely attached to both sides of the through groove 2.6; through holes for link block limit bolts 2.3 are penetrated through both ends of the first link block 2a and the link block 2b which has both a movable end and a coupling end. Through holes for movable locking shaft limit bolts 1.2 are penetrated through both radial sides of the middle of the movable locking shaft 1. A limit bolt 4 that is movably fitted with the through hole for link block limit bolts 2.3 is simultaneously inserted into the through hole for link block limit bolts 2.3 and the through hole for movable locking shaft limit bolts 1.2; the limit switch 3 is integrally provided with the limit bolt 4 inserted into the first link block 2a; a limit spring hole 1.4 along the locking direction of the movable locking shaft 1 is provided on the inner wall of the through hole for movable locking shaft limit bolts 1.2; two mutually communicating release grooves 4.1 and boss grooves 4.2 are provided on the side surface of the limit bolt 4 opposite to the limit spring hole 1.4, wherein the boss groove 4.2 is closer to the limit switch 3 than the release groove 4.1; the limit block 6 and the limit spring 7 are arranged in the limit spring hole 1.4, one end of the limit spring 7 presses against the bottom of the limit spring hole 1.4, and the other end presses against the limit block 6; a limit block boss 6.1 is provided at the other end of the limit block 6; under the cooperation of the pressure of the limit spring 7, the limit block boss 6.1 slidably presses against the bottom where the release groove 4.1 and the boss groove 4.2 communicate with each other; a return spring 5 is provided in the boss groove, one end of the return spring 5 presses against the limit bolt 4, and the other end presses against the limit block boss 6.1; the head of the movable locking shaft 1 is a cylindrical boss 1.1; in the locked state, the movable locking shaft 1 is embedded and locked with the corresponding locking shaft hole wall under the action of the pressure of the limit spring 7; when the limit switch 3 is pressed until the limit bolt 4 moves to the position where the release groove 4.1 is opposite to the limit boss 1.3, the end of the movable locking shaft 1 moves in the unlocking direction by overcoming the friction between the pressure of the limit spring 7 and the locking shaft hole wall under the action of an external force until the inner wall of the through hole for movable locking shaft limit bolts 1.2 abuts against the limit bolt 4, and the corresponding two connecting ends are unlocked. At this time, after rotating the two connected ends relative to each other to the required locking angle position and then removing the external force, the movable locking shaft 1 is embedded and locked with the corresponding locking shaft hole 2.1 under the action of the pressure of the limit spring 7.

[0063] Embodiment 2, as shown in Figure 4, in this embodiment, a fixed flange 2c3 is provided at the end of the last link block 2c of the series rotary locking chain according to the first embodiment, and a mounting hole 2c-2 is provided on the fixed flange 2c3 to facilitate the fixation of one end of the series rotary locking chain.

[0064] Embodiment 3, as shown in FIGS. 5-6, the difference between this embodiment and the first embodiment is that: in this embodiment, the reset spring 5 is sleeved on the limit bolt 4, one end of which presses against the limit flange, and the other end presses against the second hole bottom wall in the chain block limit bolt hole; the boss groove 4.2 is shortened to a length that satisfies that the limit bolt 4 does not interfere with the limit boss 1.3 during movement. At this time, one end of the limit block 6 presses against the bottom wall of the boss groove 4.2 by the limit block boss 6.1 or simultaneously presses against the side surface of the limit bolt 4 and the bottom wall of the boss groove 4.2 for limit, and the other end is limited by the limit spring 7; one end of the limit bolt 4 is limited by the concave surface at the end of the chain block, and the other end is limited by the limit block boss.

[0065] Embodiment 4, as shown in FIGS. 7-8, the difference between this embodiment and the above embodiments is that the non-circular cross-sectional segment of the movable end locking shaft hole 2.1 and the corresponding movable locking shaft 1 is provided with twelve teeth, and the angular change value of the lockable position between each two adjacent chain blocks is 30 degrees. Compared with the regular octagonal prism shape in the first embodiment, the number of lockable positions is increased by two, and the angular change value of the lockable position is decreased; an arc surface is provided on the end face of the limit bolt 4 in its reset direction, and the angle corresponding to the arc length of the arc surface is 95 degrees. It can be obtained that there are 3 different locking angle positions between each two adjacent chain blocks of the rotary locking chain in the initial state of this embodiment, realizing that the two connected ends can be moved to the limit unlocking position by pressing the limit switch 3 when they are in the locked state at three relatively different angular positions. As shown in FIG. 7, each connection end is in the locked state, each limit bolt 4 is in the limit unlocking position, and the limit bolts 4 respectively passed through the first chain block 2a, the second chain block 2b, and the third chain block 2b are in three different locking angle positions.

[0066] Embodiment 5, as shown in FIGS. 9-15, in this embodiment, a multi-purpose series-rotating locking chain and a positioning and storage device for the series-locking chain are combined to further illustrate the present invention in detail. The series-rotating locking chain of this embodiment includes a movable locking shaft 1, a first link block 2a used as a handle, a handle cover 2a1, a first link block pin 2a2, a link block 2d with both ends being movable ends, a link block 2e with both ends being coupling ends, a last link block 2c, a limit switch 3, a limit bolt 4, a return spring 5, a limit block 6, a limit spring 7, and a pre-tightening spring 8; the first link block 2a is a link block with only one coupling end used as a handle, and the middle link blocks are connected at intervals by two different specifications of link blocks. Among them, the limit bolt 4a passed through the link block 2d with both ends being movable ends has an actuating slope 4a.1, and the two opposite side surfaces of each link block are parallel to each other, and the rotation axes of each connecting end are parallel to each other; the storage device of this embodiment includes a storage box 11, a positioning block 12, a positioning spring 13, an unlocking block 14, an unlocking block limit spring 20, an anti-detachment block 15, an anti-detachment spring 16, an unlocking key 17, an unlocking spring 18, and an ejection spring 19.

[0067] Figures 9 and 10 show the front structural schematic diagram and the partial exploded structural schematic diagram of the inclined back surface of the rotary locking chain incorporated into the storage box; among them, the first link block 2a used as a handle is arranged on the handle holder 11.4 at the storage opening; on the end surface of the end of the connecting shaft of the first link block facing the opposite end, there is a handle hole 2a-1 along the direction of the connecting shaft end. A handle cover 2a1 is connected to the opening of the handle hole 2a-1 through a pin shaft 2a2. A hole cover groove 2a-2 for simultaneously rotating and sliding the handle cover 2a1 and the pin shaft 2a2 into is provided in the handle hole 2a-1; the handle hole 2a-1 can be used to sleeved products such as camera brackets or umbrellas, or for storing emergency items; the limit switch 3 is arranged at the end of the limit bolt 4 passing through the connecting shaft end of the first link block 2a in its reset direction; according to the requirements of the installation position, the handle holder 11.4 can be rotated 180 degrees around the straight storage channel. As shown in Figures 9 and 10, the handle holder is in two opposite directions relative to the straight storage channel section; at the entrance of the straight storage channel, on the radial two sides of the movable locking shaft in the straight storage channel, there are two connected positioning block holes 11.2 and anti-disengagement holes 11.3 respectively. Among them, the positioning block hole 11.2 is closer to the storage opening than the anti-disengagement hole 11.3; the positioning block 12 and the positioning spring 13 are arranged in the positioning block hole 11.2. On the side of the positioning block hole 11.2 far from the spiral storage channel, one end of the positioning spring 13 presses against the positioning block 12, and the other end presses against the positioning spring baffle 11.5 inserted at the opening of the positioning block hole 11.2; on the side wall of the positioning block hole between the straight storage channel and the spiral storage channel, there is a positioning block installation hole, and at the opening of the positioning block installation hole, there is a baffle slot cooperating with the positioning block side baffle 11.6; since the middle section of the rotary locking chain in this embodiment is composed of two different specifications and sizes of link blocks, due to the inconsistent lengths, each link block must simultaneously unlock the connecting ends at both ends when turning, so three unlocking grooves 11.7 are provided at the turning position on the straight storage channel, at the position opposite to the end face of the head of the movable locking shaft; an unlocking key 17 and an unlocking spring 18 are respectively arranged in each unlocking groove 11.7. Among them, one end of the unlocking spring 18 presses against the unlocking key 17, and the other end presses against the unlocking spring baffle 11.8; when each link block turns, its corresponding movable locking shaft must simultaneously push the end face of its head through the unlocking key 17 to move its axis to the unlocking position.On the wall of the storage channel located on one side of the unlocking direction of the movable locking shaft, there is a groove that cooperates to release the movement of the tail of the movable locking shaft 1 in its unlocking direction; the spiral storage channel is such that the angle between two adjacent chain blocks that slide within it is greater than 90° and less than 180°. Since the non-circular cross-sectional section of the movable locking shaft and the locking shaft hole 2d.1 is in the shape of a regular octagonal prism, in order to avoid self-locking when the angle between two adjacent chain blocks is 135°, and at the same time to avoid self-locking of some of the rotating locking chains outside the storage box 11 at an unnecessary 225° angle position during use, which may interfere with normal use, a stop boss 1.5 is radially provided on the movable locking shaft. On the locking shaft hole wall corresponding to the stop boss 1.5 at three angles of 90°, 180° and 270° where the two adjacent ends need to be locked, there are stop boss grooves 2.7 that cooperate with the movement of the stop boss 1.5.

[0068] On the chain block 2d whose two ends are movable ends, positioning holes 2d-3 are penetrated on both radial sides of the movable locking shaft 1, and two movable unlocking blocks 14 are arranged in the positioning holes 2d-3, and two unlocking block limiting springs 20 are arranged between the two unlocking blocks 14. The unlocking blocks play a role in preventing dust from the positioning holes in the chain block outside the storage channel and preventing noise from being generated due to the shaking of the unlocking blocks during use. The limit bolt 4a inserted in the chain block with two movable ends is inserted into the middle of the two unlocking blocks by two split accessories with flanges and fixedly connected. On both sides of the limit bolt 4a in the direction of the positioning hole, bosses with actuating slopes 4a.1 are respectively provided. The downslopes of the two actuating slopes 4a.1 are respectively in sliding contact with the corresponding two unlocking blocks 14; during the process of the limit bolt 4a being pressed and moved, the actuating slopes 4a.1 on both sides thereof press against the two unlocking blocks 14, forcing the end faces of the two unlocking blocks 14 to face each other and approach the two ends of the positioning hole 2d-3. The edges of the ends of the two unlocking blocks 14 in the direction of the positioning hole 2d-3 and the ends of the two positioning blocks 12 facing the positioning hole 2d-3 are rounded. Anti-drop block holes 2c-5 are provided on both sides of the last chain block 2c in the direction of the positioning hole 2d-3, and two movably buckled anti-drop blocks 15 and anti-drop springs 16 are provided in the anti-drop block holes 2c-5, wherein the two ends of the anti-drop spring 16 respectively press the two anti-drop blocks 15, so that the two anti-drop blocks 15 are respectively pressed toward the two sides of the wall of the straight storage channel; when the series rotary locking chain is pulled out from the storage box 11 to the limit length, the anti-drop block 15 in the last chain block 2c slides into the anti-drop hole 11.3, and the upper wall of the anti-drop hole 11.3 blocks the flat side wall 15.2 on the anti-drop block 15 facing the storage port, thereby preventing the anti-drop block from moving toward the storage port. At this time, the series rotary locking chain has been pulled out from the storage box to the limit length. When the anti-drop block 15 moves into the storage channel, the actuated inclined surface 15.1 of the anti-drop block touches the anti-drop hole 11.3 and is forced to retreat into the anti-drop block hole 2c-5. In the process of the limit switch 3 being pressed and moved to the limit unlocking position, the actuating inclined surfaces 4a.1 on both sides of the limit bolt 4a corresponding to the positioning block 12 simultaneously press the two unlocking blocks 14 to push the positioning block 12 into the positioning block hole 11.2. At the same time, the unlocking blocks 14 in other chain blocks 2d located on the straight storage channel simultaneously press against the wall of the straight storage channel, so that the serial rotating locking chain prevents the positioning block 12 from entering the positioning hole 2d-3 during the movement; an ejection device hole is provided at the end of the last chain block, and the ejection spring 19 penetrates into the ejection device hole, one end of which presses against the bottom wall of the ejection device hole, and the other end presses against the retaining wall at the end of the spiral storage channel.

[0069] Embodiment Six. As shown in Fig. 16, the difference between this embodiment and Embodiment Five is that the unlocking inclined plane 11.9 provided at the receiving opening is used as the locking shaft unlocking device. A cylindrical boss 1.1 is provided at the end face of the movable locking shaft in its locking direction. During the receiving process, the edge of the cylindrical boss 1.1 presses against the actuating inclined plane, forcing the movable locking shaft to move to the unlocking position under the reaction force of the actuating inclined plane and always keep pressing against the wall of the receiving channel. At this time, the tail of the movable locking shaft enters the groove with clearance fit opened on the side wall of the receiving channel, so that the movable locking shaft always slides in the receiving channel in the unlocked state.

[0070] Embodiment Seven. As shown in Fig. 17, the included angle between the rotation axes of two adjacent connecting ends on the rotating locking chain is set to 90 degrees, so that two spaced chain blocks can rotate relative to the middle chain block in two orthogonal directions within a specified angle range. According to this embodiment, the relationship between the rotation axes at both ends of one or several chain blocks 2 in the series-connected rotating locking chain in the above several embodiments can be changed to be perpendicular to each other. In particular, in Embodiment Five or Embodiment Six, according to the freedom direction of the connecting end on the series-connected rotating locking chain, the matching receiving channel is set.

[0071] Embodiment Eight. As shown in Fig. 18, different from the above embodiments, in this embodiment, the limiting spring 7 is arranged between the bottom wall of the end cap 21 connected to the movable end of the chain block 2 and the end face of the tail of the movable locking shaft 1.

[0072] A threaded round groove 2b.1 is provided on the chain block 2b on the side of the unlocking direction of the movable locking shaft. A threaded hollow column 21.1 that is movably matched with the tail section of the movable locking shaft is provided on the end cap 21; in the locked state, the distance from the bottom wall of the threaded hollow column 21.1 to the end face of the tail of the movable locking shaft 1 is greater than or equal to the effective movement distance; the limiting spring 7 is arranged between the limiting spring hole 1.4 on the end face of the tail of the movable locking shaft 1 and the inner bottom wall of the threaded hollow column 21.2. One end of the limiting spring 7 presses against the bottom wall of the threaded hollow column 21.1, and the other end presses against the limiting spring hole 1.4 on the end face of the tail of the movable locking shaft 1.

[0073] Embodiment Nine, as shown in Figures 19 - 20, this embodiment shows that two series - rotating locking chains are connected to the parallel link block 2f with two shaft - connecting ends. Among them, for the specific structure of the series - rotating locking chain, please refer to the description in the foregoing embodiments, and this embodiment will not repeat it. It includes a movable locking shaft 1, a parallel link block 2f, a link block 2b with one movable end and one shaft - connecting end, a last - section link block 2c, a limit switch, a limit bolt 4, and a return spring 5. Among them, the limit switch includes a button 3a, a button return spring 3c, a return - spring stopper 3b, two button link rods 3d, a link - rod return spring 3e, and a stopper 3f. At the middle position of the parallel link block 2f on both sides of the moving direction of the limit bolt 4, button holes 2f - 1 are penetrated; at the lower end of the button hole 2f - 1, a return - spring stopper 3b is fixedly arranged through a fixing bolt 3k; on both sides below the button 3a, there are hook bosses 3.4; between the button 3a and the return - spring stopper 3b, there is a button return spring 3c, so that the button 3a is movably clamped in the button hole 2f - 1. The button link rods 3d are penetrated in the parallel link block 2f, and stoppers 3f are respectively buckled on the button - link - rod mounting ports at both ends of the parallel link block 2f; on the opposite ends of the two button link rods 3d facing each other, there are link - rod return springs 3e, one end of the link - rod return spring 3e abuts against the step wall of the button link rod 3d, and the other end abuts against the stopper 3f. On the two end parts of the button link rod 3d, there are abutting inclined surfaces one 3.3; on the limit bolt 4 at one end in the return direction of the return spring 5, there is an abutting inclined surface two 4.3, and the abutting inclined surface one 3.3 abuts against the abutting inclined surface two 4.3; on both sides adjacent to the hook boss below the button 3a, there are actuating inclined surfaces 3.1 that abut against the opposite ends of the button link rod 3d.

[0074] When pressing the button 3a of the limit switch, the actuating inclined surfaces 3.1 on both sides of the button 3a push the button link rods 3d, so that the abutting inclined surfaces one 3.3 at the opposite ends of the two button link rods 3d abut against the abutting inclined surface two 4.3 on the limit bolt 4, thereby pushing the limit bolt 4 to the limit - unlocking position. In this embodiment, according to Embodiment Five or Six, the two series - rotating locking chains can be respectively stored in the positioning storage device of the series - rotating locking chain, or stored in a positioning storage box with two storage cavities.

[0075] Embodiment Ten. As shown in FIGS. 21-24, a multi-purpose parallel rotating locking chain includes a parallel link block 2h with three coaxial end portions, three link blocks 2g each having only one movable end portion, a movable locking shaft 1, a limiting spring 7, a support shaft 23, a reset torsion spring 24, a limiting bolt 4, and a connecting rod 22. Link blocks 2g each having only a movable end portion are respectively connected to the three coaxial end portions of the parallel link block 2h. The locking directions of the movable locking shafts 1 in each connecting end portion are the same, and the three rotation axes are on the same straight line. Among them, the non-circular cross-sectional segment of the movable locking shaft 1 and the corresponding locking shaft hole is integrally in the shape of a regular octagonal prism. The adjacent movable locking shafts 1 are screwed to the tails of the movable locking shafts 1 through the connecting rod 22 and abut against the heads of the movable locking shafts 1.

[0076] Axially through holes 2h.2 for supporting shafts of the coaxial end portion, axially through holes 2g.2 for supporting shafts of the movable end portion, and axially through holes 2g.1 for locking shafts of the movable end portion that are perpendicular to and communicate with each other through both sides of the through groove are provided on both sides of the coaxial end portion and the movable end portion. The support shaft 23 is inserted into the axially through holes 2h.2 for supporting shafts of the coaxial end portion and the axially through holes 2g.2 for supporting shafts of the movable end portion, and is circumferentially fixed to the coaxial end portion and rotatably connected to the movable end portion. Among them, the inner walls of the axially through holes 2g.2 for supporting shafts of the movable end portion on both sides of the through groove 2g.6 and the outer walls of the corresponding sections of the support shaft 23 are cylindrical walls. Axially through holes 23.1 for locking shafts of the support shaft are axially penetrated at both ends of the support shaft 23, including the axially through holes for locking shafts in the coaxial end portion and partial axially through holes for locking shafts in the movable end portion.

[0077] Axially through holes 2h.3 for limiting bolts of the coaxial end portion, axially through holes 23.3 for limiting bolts of the support shaft, and axially through holes 1.2 for limiting bolts of the movable locking shaft that are perpendicular to and pass through the bottom wall mounting through holes 2g.3 of the through groove 2g.6 are simultaneously provided on both sides of the coaxial end portion, the radial sides of the movable locking shaft 1, and the radial sides of the support shaft 23. The limiting bolt 4 penetrates into the axially through holes 2h.3 for limiting bolts of the coaxial end portion from the mounting through holes 2g.3. The coaxial end portion and the support shaft 23 are fixedly connected through the limiting bolt 4. The axially through holes 1.2 for limiting bolts of the movable locking shaft are widened in the locking direction of the movable locking shaft 1 so that the distance between the inner wall of the axially through holes 1.2 for limiting bolts of the movable locking shaft in the locked state and the side wall of the corresponding limiting bolt 4 is greater than the effective movement distance, and a limiting spring hole 1.4 is provided on the side wall of the axially through holes 1.2 for limiting bolts of the movable locking shaft along the locking direction of the movable locking shaft 1. The limiting spring 7 is arranged in the limiting spring hole 1.4, one end of which abuts against the bottom wall of the limiting spring hole 1.4, and the other end abuts against the limiting bolt 4. The movable locking shaft 1 is axially movably limited in the locking shaft hole through the limiting spring 7 and the limiting bolt 4. A locking inclined groove 4.5 that abuts against the limiting spring 7 is provided on the side wall of the limiting bolt 4, so that the limiting bolt 4 is pressed against the bottom wall of the axially through holes 2h.3 for limiting bolts of the coaxial end portion by the inclined pressure on the inclined surface, thereby preventing the limiting bolt 4 from entering the mounting through holes 2g.3 and interfering with the movable end portion.

[0078] On the end support shaft hole 2h.2 of the coupling shaft, a second hole serving as a return torsion spring hole 2h.0 is provided on the inner wall near one end of the movable locking shaft head. An axially movable end torsion spring limiting groove 2g.4 for inserting one end of the return torsion spring 24 is provided on the side wall of the through groove 2g.6, and a coupling shaft end torsion spring limiting hole 2h.5 for inserting the other end of the return torsion spring 24 is radially provided on the inner wall of the return torsion spring hole 2h.0. During the installation of the return torsion spring 24, first insert one end of the return torsion spring 24 into the coupling shaft end torsion spring limiting hole 2h.5, then install the return torsion spring 24 into the return torsion spring hole 2h.0, and the other end is deformed and inserted into the movable end support shaft hole 2g.2 when the movable end and the coupling shaft end are inserted opposite to each other and is then clamped in the movable end torsion spring limiting groove 2g.4.

[0079] When the connecting rod 22 close to the locking direction of the movable locking shaft 1 is pushed in the unlocking direction of the movable locking shaft under the action of an external force, each movable locking shaft 1 is simultaneously moved from the locking position to the unlocking position under the drive of the connecting rod 22; when the external force is withdrawn, the connecting rod 22 is simultaneously reset to the locking position with the movable locking shaft 1 under the drive of the limiting spring 7.

[0080] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. Moreover, the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting; the scope of the present invention is defined by the appended claims rather than by the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A multi-purpose rotary locking chain, comprising at least two chain blocks, a movable locking shaft and a limiting device, characterized in that: The limiting device includes a limiting spring, and the movable locking shaft is axially movably limited by the limiting spring; two ends connected between the chain blocks are provided with locking shaft holes with non-circular cross-section segments communicating with each other, and an activity locking shaft with a non-circular cross-section segment matching therewith is arranged in the locking shaft holes. When the activity locking shaft is simultaneously embedded and locked with the inner walls of the locking shaft holes in the two connected ends under the action of the limiting device, the two connected ends are locked; when the activity locking shaft moves from the locking position to the unlocking position in the unlocking direction under the action of a force, at least one of the chain blocks can freely rotate around the activity locking shaft within a specified angle range, and the two connected ends are unlocked; the unlocking position is the position where the activity locking shaft axially moves by an effective movement distance from the locking position.

2. The multi-purpose rotary locking chain according to claim 1, wherein: The two connected ends are respectively a movable end and a shaft connecting end. Among them, at least one of the connecting ends is provided with a through groove, and the locking shaft holes are perpendicular to both sides of the through groove; the two connected ends are inserted and connected to each other; the shaft connecting end and the activity locking shaft are directly or indirectly connected in a non-rotatable manner as a whole.

3. The multi-purpose rotary locking chain according to claim 1 or 2, characterized in that: The activity locking shaft and the locking shaft hole are integrally stepped, and each non-circular cross-section stepped segment has a taper for embedded fit, and the non-circular cross-section of each stepped segment is an axisymmetric figure with more than three axes of symmetry; among two adjacent stepped segments, the maximum non-circular cross-sectional area of the stepped segment close to the locking direction of the activity locking shaft is less than or equal to the minimum non-circular cross-sectional area of the other stepped segment.

4. The multi-purpose rotary locking chain according to claim 1, wherein: In the locked state, the activity locking shaft is embedded and locked with the inner walls of the locking shaft holes in the two connected ends through the limiting spring.

5. The multi-purpose rotary locking chain according to claim 2, wherein: The limiting device further includes a limiting bolt. On both sides of the movable end among the two connected ends, the through grooves are provided; the shaft connecting end and the activity locking shaft are simultaneously provided with chain block limiting bolt holes and locking shaft limiting bolt holes communicating with each other in the radial direction on both sides, and the limiting bolt is arranged in the locking shaft limiting bolt hole and the chain block limiting bolt hole axially positioned therewith; the locking shaft limiting bolt hole is axially widened towards the locking direction of the activity locking shaft to the movable distance between the two opposite sides of the limiting bolt is greater than or equal to the effective movement distance.

6. The multi-purpose rotary locking chain according to claim 1, wherein: A end cap is arranged on one side of the chain block in the unlocking direction of the activity locking shaft, and a hollow column for movably cooperating with the tail section of the activity locking shaft is arranged on the end cap; in the locked state, the distance from the bottom wall of the hollow column to the end face of the tail of the activity locking shaft is greater than or equal to the effective movement distance; the limiting spring is arranged between the tail of the activity locking shaft and the bottom wall of the hollow column, one end of the limiting spring presses against the bottom wall of the hollow column, and the other end presses against the tail of the activity locking shaft.

7. The multi-purpose rotary locking chain according to claim 5, characterized in that A limiting spring hole along the locking direction of the activity locking shaft is arranged on the inner wall of the locking shaft limiting bolt hole; the limiting spring is arranged in the limiting spring hole, one end of the limiting spring presses against the bottom wall of the limiting spring hole, and the other end directly or indirectly presses against the limiting bolt.

8. The multi-purpose rotary locking chain according to claim 5 or 7, characterized in that : The limit device also includes a limit switch and a return spring, the chain blocks are connected in series with each other, the limit bolt hole passes through the two ends of the series chain block containing two connecting ends; the return spring is arranged in the limit bolt hole; the limit switch is connected to the end of the limit bolt arranged in the first section of the series chain block and located in its reset direction; a limit boss extending axially in the unlocking direction of the active locking shaft is provided on the inner wall of the limit bolt hole of the locking shaft, and a release groove for releasing the limit boss in the limit unlocking position is axially provided on the side of the limit bolt facing the limit boss; the limit bolt is connected to the corresponding chain block active limit by the return spring arranged in the limit bolt hole; in the initial state of the rotary locking chain, each connecting end is in a locked state, and the limit bolts arranged in the connected series chain blocks are in a reset state of mutual conflict; when the limit switch is pressed to the position after the return spring is compressed, each limit bolt moves to the limit unlocking position.

9. A positioning and storage device for a series-connected rotary locking chain, comprising the multi-purpose rotary locking chain according to any one of claims 1-8, characterized in that: It also includes a locking shaft unlocking device and a storage body, wherein the storage cavity of the storage body contains a storage channel, and the storage channel includes a straight storage channel section including a storage opening; the locking shaft unlocking device is fixedly arranged on the storage channel on the side of the locking direction of the movable locking shaft at this position; with the cooperation of the locking shaft unlocking device, the series rotating locking chain can slide smoothly in the storage channel.

10. The positioning and storage device for the series-rotating locking chain according to claim 9, characterized in that: The locking shaft unlocking device includes an unlocking key and an unlocking spring; on the storage channel, an unlocking groove is provided at a relative position of the end face of the head of the active locking shaft corresponding to the chain block at the time of turning; the unlocking key is arranged in the unlocking groove, one end of the unlocking spring pushes the unlocking key, and the other end thereof presses against the bottom of the unlocking groove; when the chain block turns, the unlocking key pushes the end face of the head of the active locking shaft under the action of the pressure of the unlocking spring, forcing the active locking shaft to move instantly to the unlocking position, and the number of the unlocking keys is sufficient to simultaneously unlock the active locking shaft corresponding to the chain block at any turn.

11. The positioning and storage device of the series-rotating locking chain according to claim 9, characterized in that: A cylindrical boss is provided on the head of the movable locking shaft, and the locking shaft unlocking device is an actuating ramp; in the locked state, the distance from the end face of the cylindrical boss to the chain block is greater than or equal to the movable effective distance; during the storage process, when the end face edge of the cylindrical boss touches the actuating ramp, the reaction force of the actuating ramp forces the movable locking shaft to be moved to the unlocking position.

12. The positioning and storage device for the series-rotating locking chain according to claim 9, characterized in that: The locking mechanism further comprises a positioning and unlocking device, the positioning and unlocking device comprising a positioning block, a positioning spring and an unlocking block; two positioning block holes are arranged opposite to each other on both sides of the straight receiving channel section and located at both ends of the through slot of the chain block inside the straight receiving channel section, the positioning block and the positioning spring are arranged in the positioning block hole, one end of the positioning spring presses against the bottom of the positioning block hole, and the other end thereof pushes the positioning block; the width of both sides of the ends of the positioning block located in the axial direction of the movable locking shaft is greater than the width of both sides of the through slot; on both sides of the through slot of the chain block containing the movable end, A positioning hole connected to the limit bolt hole is vertically penetrated; two unlocking blocks that are movably interlocked are arranged in the positioning hole, and a clearance opening is arranged between the two unlocking blocks; actuating inclined surface bosses are respectively arranged on both sides of the limit bolt in the direction of the positioning hole, and the limit bolt passes through the clearance opening, and the downslopes of its two actuating inclined surfaces are respectively in sliding contact with the corresponding two unlocking blocks; when the limit bolt is moved under pressure, the actuating inclined surface presses the two unlocking blocks, so that the end faces of the two unlocking blocks face each other and are close to the two ends of the positioning hole.

13. The positioning and storage device of the series-rotating locking chain according to claim 9, characterized in that: It also includes an ejection device and an anti-slip and extraction device, wherein the anti-slip and extraction device includes an anti-slip block, an anti-slip spring, an unlocking button and a button reset spring; an anti-slip block hole is vertically penetrated in the two ends of the through slot on the last connecting block of the series rotary locking chain, and two anti-slip blocks that are movably interlocked are arranged in the anti-slip block hole, and an anti-slip spring that pushes the two anti-slip blocks is arranged between the two anti-slip blocks; two ends of the two anti-slip blocks facing each other are respectively provided with a driven inclined surface on one side of the storage direction; two anti-slip holes that are connected to the straight storage channel section and cooperate with the anti-slip blocks are vertically arranged on both sides of the direction of the positioning hole on the straight storage channel section; the positioning hole is close to the storage port relative to the two anti-slip holes, and the positioning hole is located at the storage port. During the process of the anti-dropping block being detached from the anti-dropping hole, the driven inclined surface on the anti-dropping block presses against the edge of the anti-dropping hole, so that the anti-dropping block is driven to move out of the anti-dropping block hole; an unlocking button and a button reset spring are movably provided in the two anti-dropping holes, and the button reset spring is sleeved on the unlocking button; when the two unlocking buttons are manually pressed and pushed from the anti-dropping hole into the two anti-dropping block holes, the series rotary locking chain can be completely taken out of the positioning and storing device; the ejection device is provided at the end of the storing channel, and when the series rotary locking chain is completely received in the storing channel, the ejection device keeps applying pressure to the end of the series rotary locking chain, so that the series rotary locking chain pops out a small section of the storing opening at the moment of being positioned and unlocked.

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