Flexible transmission rigid lifting chain

Abstract

The invention is suitable for the field of hoisting, and provides a flexible transmission rigid lifting chain which comprises a plurality of chain links which are hinged in sequence, a chain which is formed by hinging the chain links and has a one-way bending characteristic, and an executing mechanism used for driving the chain to be switched between a horizontal state and a vertical state, the chain links are core rigid bearing units, the multiple chain links are hinged to the roller guide shafts through the connecting plates to form the chain, and the chain only has the one-way bending characteristic through hinged limiting of the connecting plates. In the invention, both space adaptation and high stroke are considered, and the application scene is wide: through the conversion design of horizontal storage and vertical lifting of the chain, high-stroke lifting is realized, the height space occupation after the equipment is retracted is greatly reduced, and the core technology that the high stroke cannot be realized in a small space is solved; the high-stroke lifting device can be widely applied to stage lifting, storage equipment, lifting equipment of an industrial production line and other scenes which have high space limitation and need high-stroke lifting.

Description

Technical Field

[0001] The invention belongs to the field of lifting, and in particular relates to a flexible transmission rigid lifting chain. Background Art

[0002] With the upgrading of industrial technology and the diversification of demands in the commercial and cultural fields, the requirements for the "spatial adaptability" of lifting equipment are becoming increasingly stringent - it is necessary to achieve a higher lifting stroke, and to minimize the height space occupied after the equipment is retracted to adapt to the limited installation space.

[0003] In the existing technology, the commonly used transmission lifting methods cannot meet the above-mentioned dual requirements of "small space + high stroke":

[0004] Traditional lifting mechanisms, such as screw drives, rack and pinion drives, hydraulic drives, and winch wire rope drives, can achieve high-travel lifting, but the equipment itself requires a fixed height (for example, the screw length must match the lifting stroke, and the screw body height must remain after retraction). These mechanisms also have complex structures and require a large installation space, making them unsuitable for "small space" scenarios such as stages and display stands. Furthermore, hydraulic drives carry the risk of oil leakage, and winch wire ropes require pulleys on supports, occupying space higher than the travel, making them difficult to meet the requirements for stable and reliable use.

[0005] Flexible transmission mechanisms: such as ordinary chain drives and belt drives. Although ordinary chains have a certain degree of flexibility and can be bent and stored, the individual chain links are not rigid enough. After being raised, they cannot form a stable rigid support structure. They are prone to bending and sagging when carrying loads, and cannot meet the requirements of "high load capacity and resistance to lateral loads". Belt drives have a weaker load-bearing capacity and are prone to aging and slipping. They are only suitable for light load and short travel scenarios.

[0006] Furthermore, while existing specialized transmission chains (such as industrial heavy-duty chains) have improved rigidity, their link structure design fails to take into account the need for flexible storage, making compact horizontal storage impossible. Furthermore, the articulated connection between the links only supports multi-directional bending, making them prone to dislocation in a vertical position due to lateral loads, making them unable to form a stable columnar support structure.

[0007] Therefore, a flexible transmission rigid lifting chain is needed to solve the above problems. Summary of the Invention

[0008] The purpose of the embodiments of the present invention is to provide a flexible transmission rigid lifting chain to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] Flexible transmission rigid lifting chain, including:

[0011] A plurality of chain links hinged in sequence, a chain formed by the hinged chain links and having a one-way bending property, and an actuator for driving the chain to switch between a horizontal state and a vertical state;

[0012] The chain link is a core rigid load-bearing unit, and a number of the chain links are hinged to the roller guide shaft through a connecting plate to form a chain, and the hinge limit of the connecting plate enables the chain to have only one-way bending characteristics;

[0013] The actuator includes a transmission sprocket and a drive assembly. The transmission sprocket is engaged with the chain links of the chain. The drive assembly is connected to the transmission sprocket to drive the transmission sprocket to rotate, thereby driving the chain to switch between a horizontal state and a vertical state.

[0014] A further technical solution is that the chain link includes a bracket, which is composed of two outer plates, two inner plates and three supporting partitions; the outer plates and the inner plates are both provided with concave and convex openings, the two outer plates are symmetrically arranged on the outer side, the two inner plates are symmetrically arranged on the inner side, and the three supporting partitions are spaced and distributed between the inner plates and the outer plates, and the outer plates, the inner plates and the supporting partitions are connected to form a frame structure; two groups of holes are opened on both sides of the bracket, and the two groups of holes are respectively adapted to the diameters of the load-bearing shaft and the roller guide shaft, for passing the load-bearing shaft and the roller guide shaft;

[0015] The bracket is the core frame of the chain link. The combined design of two outer plates + two inner plates + three supporting partitions can be formed by welding, casting or extrusion to form a stable structure of "inner and outer double layers + middle partition" - the inner and outer plates realize the positioning and lateral protection of adjacent chain links through concave and convex openings, and the inner and outer plates evenly distribute the load. The partitions firmly connect the inner and outer plates together to ensure the rigidity of a single chain link; compared with the single chain plate structure of an ordinary chain, the bracket of the present invention enables the chain link to have the characteristics of an "independent rigid unit", laying the foundation for forming a columnar rigid structure after lifting.

[0016] A further technical solution is that two load-bearing shafts are passed through the two groups of holes on one side of the bracket; the length of the load-bearing shaft is adapted to the width of the bracket, and the load-bearing shaft is divided into several sections by the inner plate and the outer plate, and the outer side of each load-bearing shaft is provided with a load-bearing shaft sleeve; the outer sides of the parts of the two ends of the load-bearing shaft that extend out of the bracket are installed with retaining rings, and the retaining rings are used to limit the axial movement of the load-bearing shaft;

[0017] The load-bearing shaft is the core of the chain link power transmission. The inner plate and the outer plate divide the load-bearing shaft into multiple sections, increasing the shear surface of the load-bearing shaft and effectively reducing the shear stress of the load-bearing shaft. The load-bearing sleeve on each section can avoid direct friction between the load-bearing shaft and the sprocket on the one hand, and reduce the wear of the gear teeth on the load-bearing shaft through the engagement of the load-bearing sleeve with the actuator sprocket on the other hand (the load-bearing sleeve is made of high-hardness alloy material with lower hardness than the gear teeth); the setting of the retaining ring can effectively limit the axial movement of the load-bearing shaft and prevent the shaft components from falling off during operation.

[0018] A further technical solution is that two roller guide shafts are passed through the two groups of holes on the other side of the bracket; both ends of each roller guide shaft are sequentially equipped with a snap ring, a gasket, a roller and a gasket along the axial direction; the inner diameter of the roller is adapted to the diameter of the roller guide shaft, and the outer diameter is adapted to the guide track surface of the running path, which is used to guide the chain link during movement; the roller guide shaft is divided into several sections by the inner plate and the outer plate, and the outer sleeve of each roller guide shaft is provided with a positioning sleeve, which is used to limit the relative displacement of the roller and the inner plate and the outer plate;

[0019] The roller guide shaft has the dual functions of "articulation shaft" and "guide shaft" - as an articulation shaft, it provides an installation base for the connecting plate to realize the articulation of adjacent chain links; as a guide shaft, the rollers on its outside can contact the running path when the chain moves (horizontally stored or vertically raised), converting sliding friction into rolling friction, reducing the resistance of the chain when moving; the positioning sleeve can limit the lateral displacement of the roller, avoiding the collision of the roller with the inner plate and outer plate to produce abnormal noise, and the gasket can cushion the contact impact between the roller and the retaining ring, thereby extending the life of the component.

[0020] According to a further technical solution, the connecting plates are flat-plate structures, of which there are at least two and symmetrically arranged on both sides of the chain link; holes adapted to the roller guide shafts are provided at both ends of the connecting plates, and adjacent chain links are hingedly connected by being sleeved on the same roller guide shaft through the connecting plates; the length of the connecting plates is adapted to the pitch of the chain link;

[0021] The symmetrical arrangement of the connecting plates ensures balanced force on adjacent chain links after articulation, avoiding tilting of the chain links caused by unilateral articulation. The holes at both ends of the connecting plates cooperate with the small clearance of the roller guide shaft to limit the bending direction between the chain links - bending is only allowed in the "horizontal storage" or "vertical raising" direction, and reverse bending is restricted, thus ensuring the overall rigidity of the chain in the vertical state and avoiding structural failure due to misoperation.

[0022] A further technical solution is that the tooth shape of the transmission sprocket is adapted to the bearing sleeve outside the bearing shaft; the number of the transmission sprocket rows is at least one, arranged at the vertical section of the chain, and the wheel shaft of the transmission sprocket is connected to the drive assembly; through the forward rotation of the transmission sprocket, the chain can be pushed to switch from a horizontal state to a vertical state to form a rigid columnar structure; through the reverse rotation of the transmission sprocket, the chain can be pulled to switch from a vertical state to a horizontal state;

[0023] Placing the transmission sprocket in the vertical section of the chain ensures that the meshing force between the teeth and the load-bearing shaft is aligned with the chain's lifting direction (vertical direction), improving the meshing accuracy between the sprocket and the load-bearing sleeve and reducing lifting vibration. Multiple rows of transmission sprockets are symmetrically arranged on one side of the chain to increase the chain's carrying capacity, effectively reducing shear stress on the load-bearing shaft, avoiding deformation caused by stress and uneven wear of the sleeve, thereby increasing service life.

[0024] In a further technical solution, the concave-convex openings of the inner plate and the concave-convex openings of the outer plate are complementary in shape, and the inner plates and outer plates of adjacent chain links form concave-convex contact when the chain is in a vertical state; the concave-convex contact is used to limit link dislocation caused by lateral loads in the vertical state of the chain;

[0025] The concave-convex contact structure is the core design to prevent the chain from being dislocated in the vertical state. When the chain is subjected to lateral loads, the concave-convex structures of adjacent links restrain each other, ensuring the limiting accuracy and avoiding link dislocation. Compared with ordinary chains that only use pins to limit the position, the concave-convex contact of the present invention improves the overall anti-lateral ability.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention takes both space adaptability and high stroke into consideration, and has a wide range of application scenarios: through the "chain horizontal storage + vertical lifting" conversion design, it not only achieves high-stroke lifting, but also greatly reduces the height space occupied by the equipment after it is retracted. This core technology solves the problem of "high stroke cannot be achieved in a small space" and can be widely used in scenes with high space restrictions and high-stroke lifting, such as stage lifting and storage equipment;

[0028] The present invention has excellent rigid support and load-bearing stability: a single chain link is an independent rigid unit, and multiple chain links form a "columnar rigid structure" after being vertically raised. The greater the load, the tighter the concave-convex contact between the inner and outer plates of adjacent chain links, and the overall rigidity is simultaneously enhanced; at the same time, the symmetrical arrangement of the load-bearing shaft and the load-bearing shaft sleeve can evenly distribute the load, avoid local stress concentration, and ensure stable load-bearing in the vertical state. It is suitable for heavy loads and occasions with high support rigidity requirements, such as heavy cargo lifting.

[0029] The application is safe in operation and stable and reliable in transmission: the chain only has one-way bending characteristic and can only bend in the horizontal storage or vertical lifting direction, so that deformation of the chain caused by operation error can be avoided, and operation safety is ensured; the transmission sprocket of the actuator is arranged on the vertical section of the chain, the meshing force direction is consistent with the lifting direction, the meshing precision is higher, the wear caused by lateral component force is reduced, the chain lifting process is stable, and the service life of the transmission component is prolonged.

[0030] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure schematic view of the front perspective of the present application;

[0032] Figure 2 It is a structure schematic view of the front perspective of the present application;

[0033] Figure 3 It is a structure schematic view of the front perspective of the support of the present application;

[0034] Figure 4 It is a structure schematic view of the top perspective of the support of the present application;

[0035] Figure 5 It is a structure schematic view of the front perspective of the support of the present application;

[0036] Figure 6 It is a structure schematic view of the side perspective of the support of the present application;

[0037] Figure 7 It is a structure schematic view of the side perspective of the positioning sleeve of the present application;

[0038] Figure 8 It is a structure schematic view of the front perspective of the support of the present application;

[0039] Figure 9 It is a structure schematic view of the top perspective of the inner side plate of the present application;

[0040] Figure 10 It is a structure schematic view of the top perspective of the support partition plate of the present application.

[0041] In the figure: 1, chain link; 2, actuator; 3, support; 4, outer side plate; 5, inner side plate; 6, support partition plate; 7, bearing shaft; 8, bearing shaft sleeve; 9, roller guide shaft; 10, snap ring; 11, gasket; 12, roller; 13, positioning sleeve; 14, connecting plate; 15, chain. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0044] Example 1

[0045] like Figures 1-10 As shown, an embodiment of the present invention provides a flexible transmission rigid lifting chain, including chain links, which are hinged in sequence, including:

[0046] A plurality of chain links 1 hinged in sequence, a chain 15 hinged by the chain links 1 and having a one-way bending property, and an actuator 2 for driving the chain 15 to switch between a horizontal state and a vertical state;

[0047] Among them, the chain link 1 is the core rigid load-bearing unit, which includes a bracket 3, which is composed of two outer plates 4, two inner plates 5 and three supporting partitions 6. The outer plates 4 and the inner plates 5 are both provided with concave and convex openings. The two outer plates 4 are symmetrically arranged on the outer side, and the two inner plates 5 are symmetrically arranged on the inner side. The three supporting partitions 6 are spaced and distributed between the inner plates 5 and the outer plates 4. The three are connected to form a frame structure. Two sets of holes are opened on both sides of the bracket 3, which are respectively adapted to the diameters of the load-bearing shaft 7 and the roller guide shaft 9 for passing the corresponding shaft bodies.

[0048] Several chain links 1 are hingedly connected to the roller guide shaft 9 via connecting plates 14 to form a chain 15. The connecting plates 14 are flat structures, with at least two plates 14 symmetrically arranged on both sides of the chain link 1. Holes adapted to the roller guide shaft 9 are provided at both ends of the connecting plates 14. Adjacent chain links 1 are hingedly mounted on the same roller guide shaft 9 via the connecting plates 14. The length of the connecting plates 14 is adapted to the pitch of the chain links 1. The hinged limiter ensures that the chain 15 has only one-way bending characteristics.

[0049] The actuator 2 includes a transmission sprocket and a drive assembly. The tooth shape of the transmission sprocket is adapted to the bearing sleeve 8 outside the bearing shaft 7. There is at least one row of transmission sprockets arranged in the vertical section of the chain 15. The axle of the transmission sprocket is connected to the drive assembly. The drive assembly is in driving connection with the transmission sprocket and can drive the transmission sprocket to rotate forward or reverse.

[0050] In this embodiment, through the conversion design of "horizontal storage of the chain (into the storage box) + vertical lifting (forming a rigid column)", relying on the bracket frame structure of the chain link 1, the one-way bending limit of the connecting plate 14 and the transmission drive of the actuator 2, high-stroke lifting is achieved and the height space occupied after the equipment is retracted is greatly reduced. This core technology solves the problem of "high stroke cannot be achieved in a small space" and can be widely used in scenes with high space restrictions and high-stroke lifting, such as stage lifting and storage equipment.

[0051] Example 2

[0052] The difference between this embodiment and embodiment 1 is that:

[0053] Two load-bearing shafts 7 are passed through the two groups of holes on one side of the bracket 3. The length of the load-bearing shaft 7 is adapted to the width of the bracket 3 and is divided into several sections by the inner plate 5 and the outer plate 4. A load-bearing shaft sleeve 8 is provided on the outer side of each section of the load-bearing shaft 7. A retaining ring 10 is installed on the outer side of the part of the load-bearing shaft 7 extending out of the bracket 3 at both ends to limit the axial movement of the load-bearing shaft 7; two roller guide shafts 9 are passed through the two groups of holes on the other side of the bracket 3. Both ends of each roller guide shaft 9 are sequentially equipped with a retaining ring 10, a gasket 11, a roller 12 and a gasket 11 along the axial direction. The inner diameter of the roller 12 is adapted to the diameter of the roller guide shaft 9, and the outer diameter is adapted to the guide track surface of the running path. The roller guide shaft 9 is divided into several sections by the inner plate 5 and the outer plate 4. A positioning sleeve 13 is provided on the outer side of each section to limit the relative displacement of the roller 12 and the inner plate 5 and the outer plate 4.

[0054] In this embodiment, a single chain link 1 relies on the cooperation between the load-bearing shaft 7 and the load-bearing sleeve 8 to achieve power transmission and wear protection, and reduces the movement resistance through the combination of the roller guide shaft 9 and the roller 12 to form an independent rigid unit; after the multi-section chain 15 is vertically raised, the symmetrical arrangement of the load-bearing shaft 7 and the load-bearing sleeve 8 can evenly distribute the load and avoid local stress concentration, and cooperate with the frame structure of the bracket 3 to form a "columnar rigid structure", and the greater the load, the tighter the concave and convex contact between the inner plate 5 and the outer plate 4 of the adjacent chain links, and the overall rigidity is simultaneously enhanced, which is suitable for heavy loads and high support rigidity requirements, such as heavy cargo lifting.

[0055] Example 3

[0056] The difference between this embodiment and embodiment 2 is that:

[0057] The concave-convex mouth of the inner side plate 5 is complementary in shape to the concave-convex mouth of the outer side plate 4, when the chain 15 is in a vertical state, the inner side plate 5 and the outer side plate 4 of the adjacent chain link 1 form concave-convex contact, for limiting the dislocation of the chain link 1 due to the lateral load; at the same time, the transmission sprocket of the actuator 2 is arranged at the vertical section of the chain 15, the meshing force direction of the sprocket teeth and the load bearing sleeve 8 is consistent with the lifting direction (vertical direction) of the chain 15, reducing the wear caused by the lateral component force.

[0058] In this embodiment, the chain 15 relies on the hinge limiting of the connecting plate 14 and only has one-way bending characteristics, and can only bend in the horizontal storage or vertical lifting direction, avoiding chain deformation caused by operation errors; the concave-convex contact structure of the adjacent chain links forms effective limiting under the action of the lateral load, preventing the lateral displacement of the chain link 1; the transmission sprocket of the actuator 2 precisely meshes with the load bearing sleeve 8, making the lifting process of the chain 15 stable, prolonging the service life of the transmission components, ensuring operation safety, and being suitable for scenes with high requirements for running stability and safety, such as precision equipment lifting, aerial work platforms, etc.

[0059] The working principle and use process of the application are as follows:

[0060] Around the core process of "horizontal storage-vertical lifting-stable bearing-horizontal reset", it is specifically divided into five steps, and each component cooperates to realize the complete lifting function:

[0061] System initialization and standby stage; before the external control system (such as PLC, remote controller) receives the start signal, the chain 15 is in a horizontal storage state, only the starting end (meshing end with the actuator 2) of the chain 15 is stretched out at the opening end of the actuator, and the chain 15 and the transmission sprocket of the actuator 2 are in meshing; at this time, the drive assembly of the actuator 2 is in a power-off brake state to prevent the chain 15 from moving by itself; the control system confirms that the chain 15 is in a horizontal state through a position sensor, and the system enters a standby state;

[0062] Chain vertical lifting stage; when the control system receives the "lifting" signal, the drive assembly of the actuator 2 is powered on to drive the transmission sprocket to rotate forward:

[0063] The sprocket teeth of the transmission sprocket mesh with the load bearing sleeve 8 of the chain link 1, and the load bearing sleeve 8 is driven to move by the thrust of the sprocket teeth, and then a single chain link 1 is pushed out of the opening of the actuator;

[0064] The removed chain link 1 rotates in the one-way bending direction (vertical direction) under the hinge action of the connecting plate 14, and forms a continuous vertical section with the subsequently removed chain link 1; at the same time, the outer side plate 4 and the inner side plate 5 of the adjacent chain links form concave-convex contact to limit the lateral dislocation;

[0065] When the vertical length of the chain 15 reaches the target lifting stroke, the control system receives a signal from a stroke sensor (such as a proximity switch at the top of the vertical section), decelerates the drive assembly to a stop, and simultaneously de-energizes the brake. The chain 15 maintains a vertical rigid state, completing the lifting.

[0066] Stable load-bearing stage: When the chain 15 is in a vertical state, the object to be lifted (such as stage lights, industrial workpieces) is connected to the vertical section of the chain 15 through a connector (such as a load-bearing platform):

[0067] The weight of the object is transferred to the outer plate 4, inner plate 5 and supporting partition 6 of each link 1 through the load-bearing platform, forming a columnar structure with uniform force;

[0068] As the load increases, the concave-convex contact pressure of adjacent chain links increases synchronously, the fit clearance is further reduced, and the overall rigidity of the chain 15 is enhanced, ensuring stable load bearing.

[0069] If there is a lateral load (such as wind force or workpiece placement deviation), the concave-convex contact structure forms a limit, restricting the lateral displacement of the chain link 1 and preventing the chain 15 from tilting or misaligning. The transmission sprocket of the actuator 2 remains in an engaged state, further restricting the axial movement of the chain 15 and ensuring load safety.

[0070] Chain horizontal reset (storage) stage: When the control system receives the "down" signal, the drive assembly of actuator 2 is energized in reverse, driving the transmission sprocket to reverse (in the direction of "pulling the chain to move horizontally"):

[0071] The transmission sprocket teeth engage with the bearing sleeve 8, pulling the bearing shaft 7 to move, thereby driving the vertical section of the chain 15 to bend in the horizontal direction;

[0072] The bent chain links 1 are stacked in sequence to form a horizontal state under the guidance of the rollers 12;

[0073] When the vertical section of the chain 15 is converted to a horizontal state, the drive assembly decelerates to a stop, the power is cut off and the brake is applied, and the chain 15 returns to a horizontal state;

[0074] Cyclic operation stage; if continuous lifting operation is required, the control system can automatically repeat the above "lifting-loading-resetting" process according to the "workpiece arrival signal" and "transfer completion signal":

[0075] When the first workpiece is transferred to the chain 15 carrying platform, the system automatically performs the lifting process; after the workpiece is transferred to the target position, the reset process is performed;

[0076] After the reset is completed, the system receives the "arrival signal" of the next workpiece and starts the lifting process again to achieve continuous cycle operation;

[0077] During operation, the control system monitors the current of the actuator 2 and the position of the chain 15 in real time, and if overload or set position deviation occurs, the machine stops immediately and an alarm is given to ensure the safety of the machine.

[0078] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Flexible transmission rigid lifting chain, characterized by: include: A plurality of chain links (1) hinged in sequence, a chain (15) hingedly formed by the chain links (1) and having a one-way bending characteristic, and an actuator (2) for driving the chain (15) to switch between a horizontal state and a vertical state; The chain link (1) is a core rigid bearing unit, and a plurality of the chain links (1) are hinged to the roller guide shaft (9) via a connecting plate (14) to form a chain (15), and the hinge limit of the connecting plate (14) enables the chain (15) to have only a one-way bending characteristic; The actuator (2) includes a transmission sprocket and a drive assembly, the transmission sprocket is engaged with the chain link (1) of the chain (15), and the drive assembly is connected to the transmission sprocket to drive the transmission sprocket to rotate, thereby driving the chain (15) to switch between a horizontal state and a vertical state.

2. The flexible transmission rigid lifting chain according to claim 1, characterized in that: The chain link (1) includes a bracket (3), and the bracket (3) is composed of two outer plates (4), two inner plates (5) and three supporting partitions (6); the outer plates (4) and the inner plates (5) are both provided with concave and convex openings, the two outer plates (4) are symmetrically arranged on the outer side, the two inner plates (5) are symmetrically arranged on the inner side, and the three supporting partitions (6) are spaced and distributed between the inner plates (5) and the outer plates (4); the outer plates (4), the inner plates (5) and the supporting partitions (6) are connected to form a frame structure; two groups of holes are opened on both sides of the bracket (3), and the two groups of holes are respectively adapted to the diameters of the load-bearing shaft (7) and the roller guide shaft (9), and are used to pass the load-bearing shaft (7) and the roller guide shaft (9).

3. The flexible transmission rigid lifting chain according to claim 2, characterized in that: Two bearing shafts (7) are inserted into two groups of holes on one side of the bracket (3); the length of the bearing shaft (7) is adapted to the width of the bracket (3), and the bearing shaft (7) is divided into several sections by the inner plate (5) and the outer plate (4), and a bearing shaft sleeve (8) is provided on the outer side of each section of the bearing shaft (7); a retaining ring (10) is installed on the outer side of the part extending out of the bracket (3) at both ends of the bearing shaft (7), and the retaining ring (10) is used to limit the axial movement of the bearing shaft (7).

4. The flexible transmission rigid lifting chain according to claim 2, characterized in that: Two roller guide shafts (9) are passed through the two groups of holes on the other side of the bracket (3); both ends of each roller guide shaft (9) are sequentially equipped with a snap ring (10), a gasket (11), a roller (12) and a gasket (11) along the axial direction; the inner diameter of the roller (12) is adapted to the diameter of the roller guide shaft (9), and the outer diameter is adapted to the guide track surface of the running path, and is used for guiding the chain link (1) when it moves; the roller guide shaft (9) is divided into several sections by the inner plate (5) and the outer plate (4), and a positioning sleeve (13) is provided on the outer side of each section of the roller guide shaft (9), and the positioning sleeve (13) is used to limit the relative displacement of the roller (12) and the inner plate (5) and the outer plate (4).

5. The flexible transmission rigid lifting chain according to claim 1, characterized in that: The connecting plates (14) are flat plate structures, with at least two of them being symmetrically arranged on both sides of the chain link (1); holes adapted to the roller guide shaft (9) are provided at both ends of the connecting plates (14); adjacent chain links (1) are hingedly connected by being sleeved on the same roller guide shaft (9) through the connecting plates (14); and the length of the connecting plates (14) is adapted to the pitch of the chain link (1).

6. The flexible transmission rigid lifting chain according to claim 1, characterized in that: The tooth shape of the transmission sprocket is adapted to the bearing sleeve (8) outside the bearing shaft (7); the number of rows of the transmission sprocket is at least one, which is arranged at the vertical section of the chain (15), and the wheel shaft of the transmission sprocket is connected to the driving assembly; by the forward rotation of the transmission sprocket, the chain (15) can be pushed to switch from a horizontal state to a vertical state, forming a rigid columnar structure; by the reverse rotation of the transmission sprocket, the chain (15) can be pulled to switch from a vertical state to a horizontal state.

7. The flexible transmission rigid lifting chain according to claim 2, characterized in that: The concave-convex opening of the inner plate (5) and the concave-convex opening of the outer plate (4) are complementary in shape, and the inner plates (5) and outer plates (4) of adjacent chain links (1) form concave-convex contact when the chain (15) is in a vertical state; the concave-convex contact is used to limit the dislocation of the chain links (1) caused by lateral loads when the chain (15) is in a vertical state.

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