An OHT suspended lifting system and its lifting and lowering components

Abstract

The present application provides an OHT suspended lifting system and its lifting and lifting components, which are applied to the field of semiconductor handling equipment technology, wherein the lifting and lifting components include: at least one driving mechanism, a belt lifting mechanism, a belt retracting mechanism and a belt component; wherein the belt lifting mechanism has a first rotating shaft and at least one synchronous wheel arranged along the axial direction of the first rotating shaft; the belt retracting mechanism has a second rotating shaft and at least one winding portion arranged along the axial direction of the second rotating shaft; the belt component includes at least one belt, and a belt passing around the corresponding synchronous wheel, and one end of the belt is correspondingly connected to the winding portion; at least one driving mechanism drives the first rotating shaft and the second rotating shaft. By adopting a new structure and staggering the relative positions of the various mechanisms, the belt retracting and auxiliary synchronous lifting and supporting are realized, which effectively reduces the height occupation of the component, and is very convenient for the OHT suspended lifting system to be deployed above the track.

Description

Technical Field

[0001] The present application relates to the technical field of semiconductor handling equipment, and in particular to an OHT suspended lifting system and a lifting and lowering assembly thereof. Background Art

[0002] Traditional frame-type automated OHT lifting system (OHT Lifter) is usually installed on a ground-to-air track (or even on the ceiling). Although this type of system can provide a variety of safeguards for the lifting process of the OHT trolley, such as using electricity to ensure that the center of gravity of the OHT trolley remains stable throughout the lifting process, the main frame requires a lot of workshop space and is not suitable for the current factory workshop to carry out new capacity improvement and transformation needs.

[0003] Existing solutions have begun to try to adopt the OHT suspended lifting system, that is, the lifting system is installed in the air space between the aerial track (that is, the OHT running track) and the ceiling (also known as the roof, ceiling, etc.), thereby utilizing this part of the air space to solve the problem of the traditional lifting system occupying workshop space as much as possible.

[0004] The lifting platform carrying the OHT trolley has a large weight, which requires the lifting system to have appropriate stability and support capabilities to ensure the safety of the OHT trolley during lifting and transportation. Summary of the invention

[0005] In view of this, in order to improve the stability and safety of the OHT trolley during the lifting and transportation process, the embodiments of the present specification provide an OHT suspended lifting system and a lifting and lifting assembly thereof.

[0006] The embodiments of this specification provide the following technical solutions:

[0007] The embodiment of this specification provides a lifting and lifting assembly, including:

[0008] at least one drive mechanism;

[0009] A belt lifting mechanism having a first rotating shaft and at least one synchronous wheel arranged along the axial direction of the first rotating shaft;

[0010] A belt retracting and unretracting mechanism, comprising a second rotating shaft and at least one retracting portion arranged along the axial direction of the second rotating shaft; and

[0011] A belt assembly, the belt assembly comprising at least one belt, wherein:

[0012] The belt is passed around a synchronous wheel, and one end of the belt is connected to a winding portion, wherein the belt meshes with the synchronous wheel to form a wrap angle and is supported by the synchronous wheel, and the other end of the belt is connected to the lifting object;

[0013] The first rotating shaft is configured to be driven by a driving mechanism to rotate a synchronous wheel on the first rotating shaft, wherein the synchronous wheel drives a belt meshed with the synchronous wheel to lift or lower the lifting object;

[0014] The second rotating shaft is configured to be driven by a driving mechanism to rotate a winding portion on the second rotating shaft, wherein the winding portion correspondingly connected to a belt winds up or releases the belt.

[0015] The aforementioned lifting and hoisting assembly can be applied to an OHT suspended lifting system, and correspondingly, the lifting object is a lifting platform, which can carry an OHT trolley.

[0016] The synchronous wheel on the first rotating shaft meshes with the belt through teeth, and the meshing structure provides support for the belt, which has the advantage of stability, especially in scenarios with heavy loads, and has high support capacity. In addition, the first rotating shaft receives power from the driving mechanism, which in turn drives the synchronous wheel to rotate, and the synchronous wheel drives the belt to rise and fall, so that the belt always obtains stable support from the synchronous wheel.

[0017] The winding portion on the second rotating shaft winds up the belt to form a belt roll or releases the belt from the belt roll when rotating. With the help of the aforementioned first rotating shaft and the synchronous wheel arranged thereon, the winding portion can provide no support for the belt assembly and the lifting object suspended on the belt assembly. Therefore, the gravity load is not applied to the aforementioned belt roll, which can prevent the belt roll from being wound too tightly, thereby helping to extend the life of the belt assembly.

[0018] Optionally, the at least one driving mechanism includes a servo motor and a reducer transmission-connected to the servo motor, and the reducer drives the first rotating shaft and the second rotating shaft to rotate via a transmission component.

[0019] Preferably, the transmission assembly comprises:

[0020] A first gear mechanism, wherein a gear rotation shaft of the first gear mechanism is connected to a speed reducer;

[0021] A second gear mechanism and a belt pressing mechanism; wherein the second gear mechanism is connected to the first gear mechanism through gear transmission, and the second gear mechanism is connected to the first rotating shaft to drive the first rotating shaft to rotate; the belt pressing mechanism is pressed on a side wall of the at least one belt away from the synchronous wheel meshing with the belt, so that a wrap angle of a specified angle is formed between the belt and the synchronous wheel;

[0022] A third gear mechanism, wherein the third gear mechanism is connected to the first gear mechanism through gear transmission, and the third gear mechanism is connected to the second rotating shaft to drive the second rotating shaft to rotate, and is used to drive the at least one winding portion to retract and release the belt;

[0023] The first gear mechanism is used to synchronously drive the second gear mechanism and the third gear mechanism.

[0024] Preferably, the OHT suspended lifting system comprises a docking track, and the transmission assembly is arranged on the outside just above the docking track and below the ceiling.

[0025] Preferably, a clutch is connected between the second rotating shaft and the transmission assembly, and the transmission assembly and the clutch are configured to drive the first rotating shaft and the second rotating shaft to rotate synchronously at the same angular velocity, or to drive the first rotating shaft to rotate;

[0026] The first rotation axis and the second rotation axis rotate in the same direction or opposite directions.

[0027] Preferably, the clutch is configured as:

[0028] During the belt winding process, in response to the torque transmitted by the clutch being greater than or equal to the cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is cut off; in response to the torque transmitted by the clutch being less than the cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is engaged;

[0029] During the process of releasing the belt, the transmission connection between the transmission assembly and the second rotating shaft is engaged, or the transmission connection between the transmission assembly and the second rotating shaft is disconnected.

[0030] Preferably, the belt lifting mechanism has four synchronous wheels arranged along the axial direction of the first rotating shaft, the belt retracting mechanism has four reeling parts arranged along the axial direction of the second rotating shaft, the belt assembly includes four belts, and the lifting and lowering assembly also includes two wheel assemblies, wherein:

[0031] Each of the four belts is passed around the corresponding synchronous wheel one by one, and one end of each belt is connected to each of the four winding parts one by one;

[0032] The two wheel assemblies are spaced apart from the first rotating axis by a preset distance in the horizontal direction;

[0033] The other ends of the two belts are connected to one end of the lifting object in the horizontal direction at intervals; the other ends of the other two belts are connected to the other end of the lifting object in the horizontal direction at intervals, and the other two belts are respectively meshed with a synchronous wheel after passing through a corresponding one of the wheel assemblies;

[0034] The horizontal direction is perpendicular to the lifting direction of the four belts.

[0035] Preferably, the lifting and hoisting assembly also includes a brake connected to the first rotating shaft and / or the second rotating shaft, and the brake is configured to brake the first rotating shaft and / or the second rotating shaft in response to at least one of power failure, stopping of belt retraction and release, or abnormality.

[0036] Preferably, the brake is a power-off brake, which is a brake with a manual release function.

[0037] Preferably, in the lifting and hoisting assembly described in any one of the embodiments in the present specification, each of the winding parts is a winding drum, wherein each winding drum is provided with a first blocking part and a second blocking part in sequence at both ends along the axial direction of the second rotating shaft, wherein an inwardly concave winding cavity is formed between the first blocking part and the second blocking part.

[0038] An embodiment of the present specification also provides an OHT suspended lifting system, characterized in that the OHT suspended lifting system includes a mounting plate and a lifting and lowering assembly as described in any one of the embodiments of the present specification, wherein the lifting and lowering assembly is arranged on the lower side of the mounting plate; the lifting and lowering assembly also includes a plurality of support bearings, wherein the first rotating shaft and the second rotating shaft are mounted on the mounting plate by means of the support bearings.

[0039] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0040] By improving the power mechanism and the driving mode of the power mechanism to the transmission mechanism, the belt assembly has a high supporting capacity, and the supporting stability and safety of the belt assembly during the lifting process are improved.

[0041] In addition, the power mechanism and the transmission mechanism are staggered, which facilitates the use of miniaturized power components and transmission components. At this time, the lifting and hoisting components are not easily restricted by height, which is conducive to flexible deployment and application in the very narrow space inside the above-mentioned OHT suspension lifting system. Therefore, by improving the power mechanism and the transmission mechanism, not only the volume occupied by the lifting and hoisting components is not significantly increased, but on the contrary, the height of the lifting and hoisting components can be reduced, avoiding the lifting and hoisting components from being restricted by the installation space in the height direction, which facilitates the actual deployment and application of the OHT suspension lifting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a structural schematic diagram of an OHT suspension lifting system in this application;

[0044] Figure 2 It is a schematic diagram of the gear transmission structure of a winch transmission assembly in the present application;

[0045] Figure 3 It is a cross-sectional schematic diagram of a compression belt in a winch transmission assembly in the present application;

[0046] Figure 4 It is a three-dimensional schematic diagram of a compression belt in a winch transmission assembly in the present application from one perspective;

[0047] Figure 5 It is a three-dimensional schematic diagram of another perspective of a compression belt in a winch transmission assembly in the present application;

[0048] Figure 6 It is a cross-sectional schematic diagram of the meshing of a synchronous wheel and a belt in a winch transmission assembly in the present application;

[0049] Figure 7 It is a structural schematic diagram of a winch transmission assembly in the present application that performs transmission based on a clutch and a brake;

[0050] Figure 8 It is a three-dimensional view schematic diagram of a lifting and lifting assembly in the present application without a belt installed, and the viewing direction in the figure is up and down opposite to the direction in the actual working state;

[0051] Fig. 9 It is a partial structural schematic diagram of a lifting and hoisting assembly in the present application;

[0052] Fig.10 It is a schematic diagram of a three-dimensional view of a lifting and lifting assembly installed with a belt in the present application;

[0053] Fig.11 It is a schematic top view of a lifting and hoisting assembly installed with a belt in the present application;

[0054] Fig.12 yes Fig.11 Schematic diagram of the EE section view;

[0055] Fig.13 yes Fig.11 Schematic diagram of the AA section. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0057] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0058] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0059] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application and are not necessarily drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0060] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0061] Although existing solutions have begun to try to adopt the OHT suspended lifting system, that is, the lifting system is installed in the air space between the aerial track (that is, the OHT running track) and the ceiling (also known as the roof, ceiling, etc.), the aerial track is usually at a relatively small distance from the ceiling, that is, the installation space that can be provided by the aerial space is very limited. Therefore, due to the narrow installation space, the suspended lifting system needs to remove more functional components, such as auxiliary guarantee components such as belt synchronization and tensioning in the lifting winch assembly, which makes it difficult to ensure the consistency of the tension of the belt on the winch, resulting in low accuracy in belt retraction and release, affecting the overall lifting accuracy.

[0062] In view of this, through in-depth research and improvement exploration of the belt and its lifting winch components, power mechanism, etc., as well as the OHT suspended lifting system, it was found that:

[0063] like Figure 1 As shown, in the current OHT suspended lifting system, a lifting and hoisting component 2 of the OHT suspended lifting system (for example, a belt lifting and winch component including a power mechanism) can be installed in the space below the ceiling mounting component 1. The lifting and hoisting component 2 controls the lifting and lowering of the lifting platform component 3, so that the lifting platform component 3 can be docked with high precision and stability through the docking track 4. The aerial electrical cabinet 5 is arranged on the side of the ceiling mounting component 1 to further make full use of the suspended space, and the ground control cabinet 6 is placed on the ground to facilitate personnel operation and control; before the OHT trolley enters the OHT suspended lifting system, it can be placed in the platform track 7 on the ground, so that when the docking track of the lifting platform component 3 of the OHT suspended lifting system is docked with the platform track, the OHT trolley can enter the lifting platform component 3, and the OHT suspended lifting system assists the OHT trolley to enter other aerial running tracks (not shown in the figure).

[0064] Usually, a flexible belt is used in the lifting and hoisting assembly 2 to connect the lifting platform assembly 3, so that the lifting and hoisting assembly 2 can retract and extend the flexible belt to realize the lifting and lowering of the lifting platform assembly 3.

[0065] However, the power mechanism components originally used in the tower lifting system cannot be directly used in the current OHT suspension lifting system due to the very limited installation space in the air. Therefore, the above-mentioned OHT suspension lifting system is often subject to height restrictions such as the power mechanism, making it difficult to implement and deploy the OHT suspension lifting system in the factory.

[0066] In addition, the traditional belt drive mechanism requires the use of large-volume components such as driving wheels and driven wheels, which takes up a lot of space. Therefore, it is difficult to deploy and apply the above-mentioned OHT suspended lifting system in a very limited installation space.

[0067] In addition, traditional gear transmission, chain transmission, etc. are also limited by installation space issues and are difficult to be directly applied to the above-mentioned OHT suspended lifting system.

[0068] Based on this, the embodiment of this specification proposes a lifting and hoisting component solution: two rotating shafts, a winding shaft and a lifting shaft, are used to realize belt winding and auxiliary synchronous support respectively, wherein the lifting shaft is equipped with a synchronous wheel, and the synchronous wheel is engaged with the belt separately, which is used for synchronization and support of the belt during winding, so as to support the lifting object (lifting platform) connected below the belt, and the winding shaft is equipped with a belt winding drum to complete the storage or release of the belt through the rotation of the winding drum. The two shafts are decoupled in support and storage functions, and the winch lifting is realized in linkage.

[0069] It should be noted that the support provided by the engagement between the synchronous wheel and the belt can ensure that the relatively large load of the entire lifting platform and the trolley as a whole is stably supported and rotated and lifted.

[0070] In addition, by using two axes for belt winding and synchronous support, it is not only helpful to reduce the space occupied by the components, but also very beneficial to the flexible arrangement and installation of the overall structure according to the layout space under the ceiling.

[0071] The following is a schematic description of the embodiments corresponding to the various components of the present application in conjunction with the accompanying drawings.

[0072] refer to Figures 2 to 13 Schematically, the present specification provides a lifting and hoisting assembly 2, comprising: at least one driving mechanism, a belt lifting mechanism, a belt retracting and releasing mechanism and a belt assembly.

[0073] like Fig.10 As shown in the figure, the belt lifting mechanism has a first rotating shaft (referred to as the lifting shaft 212 in this specification), and at least one synchronous wheel 2022 arranged along the axial direction of the first rotating shaft; the belt retracting mechanism has a second rotating shaft (referred to as the reel 208 in this specification), and at least one reeling portion (referred to as the reel 210 in this specification) arranged along the axial direction of the second rotating shaft; the belt assembly includes at least one belt, such as the first flexible belt 2091 and the second flexible belt 2092 shown in the figure, etc. The number of belts is not limited in this application, or can be transformed into one or more.

[0074] The connection diagram of the belt in the assembly is as follows: the first flexible belt 2091 is passed around the synchronous wheel 2022, and one end of the belt is connected to the winding drum 210, and the belt is meshed with the synchronous wheel to form a wrap angle, so that the belt can be supported by the synchronous wheel, and the other end of the belt is connected to the lifting object (such as the aforementioned Figure 1 Schematic diagram of the lifting platform component 3) connection.

[0075] Schematic diagram of the belt winding process in the assembly:

[0076] The lifting shaft 212 (i.e., the first rotating shaft) is configured to be driven by a driving mechanism to rotate the synchronous wheel on the first rotating shaft, so that when the belt is meshed with the synchronous wheel, the belt synchronously follows the rotation of the synchronous wheel to lift or lower the lifting object;

[0077] The reel 208 (i.e., the second rotating shaft) is configured to be driven by a driving mechanism to rotate the reel on the second rotating shaft. Therefore, when the belt is connected to the reel, the reel to which the belt is connected rotates to reel or release the belt.

[0078] It should be noted that each of the winding parts can be configured as a winding drum structure.

[0079] It should be noted that the driving mechanism may be one or more, for example, two driving mechanisms, one driving mechanism correspondingly drives one axis; or Figures 2 to 6 The illustrated driving mechanism is a driving mechanism that can synchronously drive two shafts through a transmission mechanism. The following is a schematic illustration of a driving scheme in which a power mechanism drives two shafts synchronously through a transmission mechanism.

[0080] The embodiment of this specification proposes a transmission mechanism scheme for lifting belt winch power transmission in an OHT suspension lifting system: Figure 2 As shown, the driving mechanism includes a servo motor and a reducer connected to the servo motor, and the reducer drives the first rotating shaft and the second rotating shaft to rotate by means of the transmission assembly. Specifically, a gear transmission method is adopted to form an overall transmission structure, wherein the first gear mechanism 201 is a mechanism for providing transmission power, which can be driven by motor power, the second gear mechanism 202 and the belt clamping mechanism 204 (such as the first clamping wheel 2041 and the second clamping wheel 2042 in the form of a clamping wheel) are mechanisms for auxiliary guarantees such as synchronous retraction and tensioning of the first flexible belt 2091 and the second flexible belt 2092, the third gear mechanism 203 is a mechanism for driving the reel to retract and release the belt, and the first gear mechanism 201 is used to synchronously drive the second gear mechanism 202 and the third gear mechanism 203 to rotate.

[0081] In some embodiments, the virtual rotation center axes of the gears of the first gear mechanism 201 , the second gear mechanism 202 , and the third gear mechanism 203 are not on the same straight line, so as to achieve a staggered layout of the relative positions of the gear mechanisms.

[0082] Therefore, by adopting a gear transmission and using different gear transmissions as the power mechanism for the synchronization and retraction and winding of the belt, and the gear mechanisms can be staggered, it is convenient to use a miniaturized gear mechanism. At this time, the transmission mechanism is not restricted by height, which is conducive to flexible deployment and application in a very small space inside the above-mentioned OHT suspended lifting system. Moreover, by transmitting power through meshing between gears, it is very easy to control the synchronization and tension of the belt.

[0083] In addition, by setting a belt clamping mechanism 204 at a specified position, such as setting a second clamping wheel 2042 below the synchronous wheel of the second gear mechanism 202 to the right, the direction of the belt can be changed, which can not only clamp the back of the belt to increase the meshing degree between the belt and the synchronous wheel, but also ensure the size of the wrap angle between the belt and the synchronous wheel of the second gear mechanism 202 (for example, the wrap angle is not less than a preset angle) to increase the contact area between the synchronous wheel and the belt, thereby playing a role in belt tensioning while assisting synchronization. It should be noted that the first clamping wheel 2041 can be set at a specified position (for example, the horizontal lower direction of the left side of the synchronous wheel of the second gear mechanism 202), and further clamping the back of the belt is conducive to increasing the meshing degree between the belt and the synchronous wheel, so that even if the second gear mechanism 202 is designed to be more compact, it can still provide the belt with good synchronization assistance performance, tensioning performance, etc.

[0084] In addition, the transmission assembly is arranged outside and just above the docking track of the OHT suspension lifting system and below the ceiling.

[0085] In practice, the embodiment of this specification provides a winch transmission assembly, which adopts a new transmission method and a new synchronization and clamping auxiliary mechanism to implement a winch transmission assembly that is not restricted by height and occupies very little space in the OHT suspended lifting system, so that the belt can be accurately retracted and released.

[0086] like Figures 2 to 10As shown, the winch transmission assembly includes: a first gear mechanism 201, a second gear mechanism 202, a belt clamping mechanism 204 and a third gear mechanism 203, wherein the first gear mechanism 201, the second gear mechanism 202 and the third gear mechanism 203 constitute a new type of power transmission structure that is miniaturized and height-unrestricted similar to a gear transmission, that is, the gear rotating shaft of the first gear mechanism 201 is connected to the reducer 215, and the first gear mechanism 201 is used to provide transmission power to synchronously drive the second gear mechanism 202 and the third gear mechanism 203; the second gear mechanism 202 is connected to the first gear mechanism 201 through gear transmission, and the second gear mechanism is also connected to the first rotating shaft to drive the first rotating shaft to rotate, and the third gear mechanism 203 is connected to the first gear mechanism through gear transmission, and the third gear mechanism 203 is also connected to the second rotating shaft to drive the second rotating shaft to rotate, which is used to drive the at least one winding part to retract and release the belt. Therefore, the first gear mechanism 201 synchronously drives the second gear mechanism 202 and the third gear mechanism 203, and the belt clamping mechanism 204 is arranged at a specified position beside the synchronous wheel of the second gear mechanism 202, and on a side wall of the at least one belt away from the synchronous wheel meshing with the belt, so that a wrap angle of a specified angle is formed between the belt and the synchronous wheel, so as to change the direction of the first flexible belt 2091 and the second flexible belt 2092, and to clamp and form a wrap angle of a specified angle when the synchronous wheel synchronously retracts and releases the first flexible belt 2091 and the second flexible belt 2092, the third gear mechanism 203 is used to drive the winding drum to retract and release the first flexible belt 2091 and the second flexible belt 2092, and the clamping mechanism 204 is used to change the belt routing and clamp the belt to obtain the corresponding wrap angle and tension degree of the belt in the synchronous retraction and release, thereby realizing the synchronous retraction and tensioning of the belt to ensure accurate retraction and release of the belt.

[0087] The first gear mechanism 201 can be driven by a power mechanism (such as a motor), so that the transmission power is obtained through the drive of the power mechanism. Figures 8 to 10 As shown, the power mechanism driving the first gear mechanism 201 can adopt a driving mode in which a servo motor 214 with a brake is combined with a reducer 215 to provide power and output power. The power is then output after passing through the reducer, which can prevent the motor from reversing after power failure.

[0088] like Figures 2 to 6 As shown in the figure, a synchronous wheel for belt pulling is set in the second gear mechanism 202, and the synchronous wheel is used for synchronous pulling and rotating during the retraction and release of the first flexible belt 2091 and the second flexible belt 2092, that is, under the synchronous drive of the first gear mechanism 201, when the winding drum 210 reels or lowers the belt, the synchronous wheel simultaneously pulls and rotates the belt synchronously, and the belt can always remain in a tensioned state.

[0089] refer to Figures 2 to 10The virtual rotation center axes of the first gear mechanism 201, the second gear mechanism 202, and the third gear mechanism 203 are not on the same straight line, so that the relative positions of the gear mechanisms can be staggered, so that the overall transmission mechanism is not easily restricted in the height direction. Specifically, the third gear mechanism 203 that drives the take-up drum 210 to retract the belt is arranged at a side lower direction of the first gear mechanism 201, and the second gear mechanism 202 that drives the synchronous wheel to synchronously pull the belt is arranged at the other side direction of the first gear mechanism 201.

[0090] refer to Figures 2 to 6 As shown in the figure, the belt clamping mechanism 204 redirects and clamps the belt between the synchronous wheel and the take-up drum 210, thereby forming the tension and wrap angle required for the belt pulling and rotating. It should be noted that the wrap angle can refer to the central angle of the contact arc between the belt and the pulley (such as the synchronous wheel, the take-up drum, etc.), and the size of the wrap angle can reflect the length of the contact arc between the belt and the rim surface of the pulley, so that the interaction force between the contact surfaces always meets the needs of pulling and supporting by forming a specific wrap angle size (i.e., the contact arc), and the torque of the transmission can also be flexibly adjusted to a certain extent by setting the wrap angle size.

[0091] It should be noted that the first gear mechanism 201, the second gear mechanism 202, the belt pressing mechanism 204 and the third gear mechanism 203 and other components can be driven, installed and fixed through corresponding transmission shafts, support bearings, support seats and other structures, and these components can be installed on the lower surface of the ceiling installation assembly 1 through fixings. Figures 8 to 11 In the diagram, the gears of each gear mechanism are mounted on the fixing plate 216 for relatively fixed gear transmission, and then the fixing plate 216 is suspended and fixed on the lower surface of the ceiling mounting assembly 1, and other transmission shafts, support bearings, etc. are also mounted on the lower surface of the ceiling mounting assembly 1 through corresponding fixing parts. Therefore, the fixing method of the components and the ceiling mounting assembly 1 is not specifically limited.

[0092] Therefore, the belt compression is combined with the staggered layout of each gear mechanism to meet the requirements of synchronous pulling and tensioning of the belt, and each gear mechanism can adopt a miniaturized gear mechanism. Therefore, the transmission mechanism is relatively small in height and is not easily restricted, which is conducive to the flexible deployment and application of the transmission mechanism in the aforementioned OHT suspended lifting system.

[0093] In some embodiments, in the structure where the third gear mechanism 203 drives the winding drum 210, a clutch mechanism can be added to change the torque transmitted by the third gear mechanism 203 to the winding drum 210, so as to facilitate the flexibility in adjusting the transmission torque according to the degree of tension that the belt needs to maintain between the synchronous wheel and the winding drum in actual applications. This can not only meet the need for the belt to maintain an adaptive tension, but also flexibly set and adjust the tension degree according to the actual belt requirements, thereby preventing the actual belt from being in a tensioned state and being subjected to excessive tension, thereby affecting the belt performance (such as reliability, sending and receiving accuracy, etc.).

[0094] refer to Figures 7 to 13 As shown in the figure, the hoisting transmission assembly further includes a clutch 207. Figures 7 to 13 As shown in the figure, a clutch 207 is connected between the second rotating shaft (i.e., the winding shaft 208) and the transmission assembly, and the transmission assembly and the clutch are configured to drive the first rotating shaft and the second rotating shaft to rotate synchronously with the same angular velocity, or to drive the first rotating shaft to rotate; wherein the rotation directions of the first rotating shaft and the second rotating shaft are the same or opposite.

[0095] In some examples, the clutch is used to control the following:

[0096] During the belt winding process, in response to the torque transmitted by the clutch being greater than or equal to a cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is cut off, and in response to the torque transmitted by the clutch being less than the cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is engaged;

[0097] During the process of releasing the belt, the transmission connection between the transmission assembly and the second rotating shaft is engaged, or the transmission connection between the transmission assembly and the second rotating shaft is cut off. At this time, the motor only drives the synchronous wheel on the first rotating shaft to rotate through the transmission assembly. During the process of the belt descending and releasing, the winding drum is rotated by the pull of the belt, allowing the linear speed of the belt at the synchronous wheel to be synchronized with the linear speed at the winding drum.

[0098] In addition, a PLC control unit (not shown in the figure) can also be used to reliably control the clutch, wherein the clutch 207 is electrically connected to the PLC control unit, and the clutch 207 is arranged between the third gear mechanism 203 and the winding drum 210. Therefore, the PLC control unit can flexibly set the transmission torque of the clutch 207 through the electrical connection, so that the target torque of the third gear mechanism 203 driving the winding drum 210 can be preset through the clutch 207, so that the pulling force of the winding drum 210 in the belt is always appropriate, so that the belt is not pulled too hard, and the belt is not pulled too loosely, which is conducive to improving the accuracy of belt retraction and release.

[0099] It should be noted that the PLC control unit can be a PLC unit in a control system or a newly designed PLC, which is not specifically limited here.

[0100] In some embodiments, the magnetic powder clutch transmits torque based on the electromagnetic principle and utilizes magnetic powder hardening, and its transmission torque is linearly related to the excitation current, that is, when the magnetic coil is not conductive, the torque will not be transmitted from the transmission shaft to the driven shaft, and when the coil is electromagnetically energized, the magnetic powder is hardened under the action of the excitation current, thereby transmitting torque between the hardened magnetic powder sliding. Therefore, the magnetic powder clutch is a type of torque transmission mechanism formed by combining a transmission unit and a driven unit. When used, the transmission unit of the magnetic powder clutch can be connected to the output end of the third gear mechanism 203, and the driven unit of the magnetic powder clutch can be connected to the rotation input end of the winding drum 210 (such as the winding shaft 208).

[0101] In practice, the clutch 207 is preferably a magnetic powder clutch. At this time, the PLC control unit flexibly sets the transmission torque of the magnetic powder clutch by adjusting the exciting current of the magnetic powder clutch, so that the first flexible belt and the second flexible belt are in a tensioned state during the retraction and extension process.

[0102] In some embodiments, in the torque transmission using the magnetic powder clutch, the characteristics of the magnetic powder clutch can be further utilized to more specifically control the belt retraction and extension, which is beneficial to improving the belt retraction and extension accuracy.

[0103] In practice, in order to ensure that the belt has a certain tension and maintain a suitable tension during the belt winding process, the tension should not be too large and preferably adjustable. Therefore, as in the above example, the transmission torque of the winding drum 210 driven by the third gear mechanism 203 can be first transmitted to the magnetic powder clutch, and then the transmission torque of the magnetic powder clutch can be controllably set using the PLC, so that the magnetic powder clutch drives the winding drum 210 (or the winding shaft 208 used to drive the winding drum 210) to rotate to wind the material.

[0104] In one example, as more and more belts are wound up, the diameter of the reel becomes larger and larger, and the transmission speed remains constant, the winding belt will be in a tensioned state. To prevent the synchronous belt from being over-pulled, the magnetic powder clutch can be configured to perform the following actions: when the pulling torque exceeds the torque value set by the magnetic powder clutch during the process of winding up the first flexible belt 2091 and the second flexible belt 2092 by the winding drum 210, the magnetic powder clutch interrupts the torque transmission to prevent the first flexible belt 2091 and the second flexible belt 2092 from being over-pulled. Therefore, by using the magnetic powder clutch, the belt can always be tensioned at an appropriate level without excessive pulling, which can not only ensure accurate winding and release, but also extend the belt life and reliability.

[0105] In addition, when the pulling torque is less than the torque value set by the magnetic powder clutch, the magnetic powder clutch re-transmits the torque, that is, the target torque transmitted by the third gear mechanism 203 to the winding drum 210 continues to be transmitted, so that the winding force and tensioning force of the first flexible belt 2091 and the second flexible belt 2092 located at the winding drum 210, the synchronous wheel, etc. remain consistent, and are neither over-tensioned nor loose.

[0106] Therefore, when the pulling torque exceeds the set torque value of the magnetic powder clutch, the magnetic powder clutch will slip, thereby interrupting the torque transmission. When the belt is no longer pulled and stressed, the belt may turn to a relaxed state, and the pulling torque begins to be less than the set torque value of the magnetic powder clutch. The magnetic powder clutch will re-transmit the torque, thereby ensuring that the belt winding force and the belt tensioning force are always consistent or preventing the tensioning force from being too large, so that the belt is always kept at an appropriate tension level.

[0107] In one example, in the process of lowering the first flexible belt 2091 and the second flexible belt 2092 (for example, when the belts are about to be lowered into place), the torque transmission can be interrupted by the magnetic powder clutch. At this time, the first flexible belt and the second flexible belt are always in the synchronous pulling process of the second gear mechanism 202. Therefore, the magnetic powder clutch is controlled by PLC to interrupt the power transmission, which can prevent over-winding and ensure that the belt has a certain tension and is in a suitable tightening state.

[0108] In some embodiments, the belt clamping mechanism 204 can be configured with a plurality of clamping structures to achieve compression, redirection, etc. during synchronous pulling of the belt according to the requirements of the wrap angle size, tension level, etc., so that the belt can always be tensioned to an appropriate degree during the retraction and extension process.

[0109] Refer to the above Figures 2 to 6As shown in the figure, the belt clamping mechanism 204 may include a first clamping wheel 2041 and a second clamping wheel 2042, wherein the first clamping wheel 2041 and the second clamping wheel 2042 are respectively arranged in parallel with the synchronous wheel in the second gear mechanism 202 (that is, the clamping wheel is parallel to the axis of the synchronous wheel), and the first clamping wheel 2041 is used to synchronously clamp the first flexible belt 2091 and the second flexible belt 2092 on the synchronous wheel, that is, the clamping wheel clamps the belt surface, which can not only ensure the size of the wrap angle, but also increase the degree of engagement between the belt and the synchronous wheel. In addition, the second pressure wheel 2042 is used to change the movement direction of the first flexible belt 2091 and the second flexible belt 2092 from the synchronous wheel toward the winding drum 210. At this time, when the synchronous wheel synchronously retracts and releases the first flexible belt and the second flexible belt, a good pressure effect can be obtained, and a wrap angle of a suitable specified angle can be formed under the pressure. By setting the position of the pressure wheel, a suitable pressure degree and wrap angle size can be obtained, which can ensure that the belt is always tensioned to a suitable degree during the pulling process and maintain good contact and engagement with the synchronous wheel.

[0110] During implementation, by arranging the clamping wheel and the synchronous wheel in the same fixed structure, it is helpful to ensure the degree of clamping and also convenient to complete the deployment and application according to the actual clamping needs and belt redirection needs.

[0111] refer to Figures 2 to 11 As shown in the figure, the winch transmission assembly also includes triangular mounting parts 217 disposed at both ends of the belt clamping mechanism 204, wherein the first clamping wheel 2041 and the second clamping wheel 2042 are rotatably mounted on the triangular mounting parts 217, and the synchronous wheel of the second gear mechanism 202 is simultaneously mounted in the triangular mounting parts 217 through a bearing. Therefore, after adopting the triangular mounting parts 217, not only can the relative position between the clamping wheel and the synchronous wheel be fixed by the mounting parts, which is beneficial to increase the clamping stability and clamping effect, but also the clamping wheel, synchronous wheel and other components can be fixedly mounted on the lower surface of the ceiling assembly 1 by the triangular mounting parts, which is very convenient for installing and fixing auxiliary components such as synchronous pulling and tensioning, and avoiding some restrictions caused by the installation space.

[0112] In some embodiments, by providing grooves and other structural forms, the belt can be stably confined in the structural member for synchronous pulling and rotation, thereby reducing the deviation and shaking of the belt during retraction and release, which is beneficial to improving the accuracy of belt retraction and release.

[0113] refer to Figures 2 to 11As shown in the figure, a retaining edge structure is provided in the middle of the synchronous wheel, that is, the height of the retaining edge structure is greater than the thickness of the first flexible belt and the second flexible belt. At this time, when the belt is placed in the synchronous wheel, the retaining edge structure and the triangular mounting member 217 can form a concave cavity for placing the belt, so that the belt is confined in the concave cavity of the synchronous wheel. In addition, a concave groove corresponding to the retaining edge structure of the synchronous wheel is correspondingly provided in the middle of the first pressing wheel 2041 and the middle of the second pressing wheel 2042, so that the first pressing wheel 2041 and the second pressing wheel 2042 can further press the first flexible belt and the second flexible belt on the synchronous wheel, and the synchronous wheel pulls and tensions the belt synchronously.

[0114] In one example, a corresponding shielding plate may be provided to protect the portion of the belt that is redirected, so as to prevent foreign objects from entering between the synchronous wheel and the pressure wheel and affecting the rotation of the belt.

[0115] refer to Figures 2 to 6 As shown in the figure, the shielding plate 205 is fixedly mounted on the triangular mounting member 217, and the area between the second clamping wheel 2042 and the synchronous wheel is shielded and protected by setting a corresponding bending arc.

[0116] In some embodiments, a support bearing 213 is provided between the clutch 207 and the winding drum 210, and the support bearing 213 is used to support the transmission shaft (eg, Figure 7 Schematic reel 208).

[0117] refer to Fig.12 As shown, the winding shaft 208 is provided with a step shape outside the support bearing 213 , and the step shape is connected to the inside of the support bearing 213 .

[0118] In some embodiments, a steel wire synchronous belt can be used as the above-mentioned flexible belt to fully utilize the many advantages of the steel wire synchronous belt. For example, the steel wire synchronous belt has the advantages of excellent flexural resistance, low elongation, high strength, etc. It also has oil resistance, heat resistance, aging resistance, ozone resistance, crack resistance and other properties. Moreover, when moving, the belt teeth and the tooth grooves of the pulley engage to transmit motion and power. The steel wire synchronous belt concentrates the various advantages of gear transmission, chain transmission and flat belt transmission.

[0119] The flexible belts in any of the aforementioned examples (ie, the first flexible belt and the second flexible belt) are preferably steel wire synchronous belts, which are beneficial for enhancing the effects of synchronous pulling, tensioning, etc. during belt retraction and release.

[0120] The present invention provides a lifting and hoisting assembly, which is based on the winch transmission assembly disclosed in any of the above examples, and constitutes the core component of the power source of the lifting assembly, and is combined with some power components, locking components, etc. to construct a lifting and hoisting assembly that can be applied to the above examples. Figure 1Schematic diagram of the lifting and lowering assembly 2 of the OHT suspended lifting system.

[0121] refer to Figures 7 to 13 Schematically, a lifting and hoisting assembly 2 provided in this specification includes: a servo motor 214, a reducer 215, a transmission assembly and a winding drum 210. Among them, the transmission assembly is the hoisting transmission assembly described in any of the above examples, and the transmission assembly can refer to the above examples and will not be repeated.

[0122] In practice, the servo motor 214 is connected to the reducer 215, and the reducer 215 is connected to the first gear mechanism 201 in the transmission assembly. It should be noted that the servo motor 214 can preferably be a servo motor with a brake, which can prevent the motor from reversing after power failure when combined with the reducer 215.

[0123] In implementation, when deploying applications to the aforementioned Figure 1 In the illustrated OHT suspended lifting system, the transmission capacity of the aforementioned transmission component can be adaptively expanded according to the number of belts used between the lifting and hoisting component 2 and the lifting platform component 3. For example, when four belts are required, the second gear mechanism 202 and the third gear mechanism 203 can be arranged by respectively forming synchronous wheels and winding drums for the first flexible belt and the second flexible belt at both ends of the transmission shaft, so that the same set of transmission components can be used to expand the required number of belt retracting and releasing transmission mechanisms.

[0124] refer to Figures 7 to 13 As shown in the figure, the servo motor 214 outputs power to the reducer 215, and the reducer 215 drives the first gear mechanism 201 to rotate. The gear of the first gear mechanism 201 is meshed with the gear of the second gear mechanism 202 and the gear of the third gear mechanism 203 to complete the synchronous drive. On the one hand, the gear of the second gear mechanism 202 rotates to drive the lifting shaft 212 to rotate, and the lifting shaft 212 rotates to drive the synchronous wheel to rotate. The synchronous wheel pulls and tensions the first flexible belt 2091 and the second flexible belt 2092 synchronously, and then assists the reel 210 to retract and release the belt to complete the winding process. On the other hand, the gear of the third gear mechanism 203 rotates to drive the reel 208 to rotate, and the reel 210 rotates synchronously after the reel 208 rotates. After the reel 210 rotates, it can synchronously retract and release the first flexible belt 2091 and the second flexible belt 2092 to complete the winding process.

[0125] In some embodiments, when deploying the application to the aforementioned Figure 1In the schematic diagram of the OHT suspended lifting system, the above-mentioned transmission shaft (such as the lifting shaft 212 and the winding shaft 208) can be arranged along the length direction of the track according to the installation space that can be provided between the space above the track and the ceiling installation component 1, that is, the power and transmission core components of the lifting and lifting component 2 are arranged on the lower surface of the ceiling installation component 1 and on one side of the track width direction, thereby reducing the occupation of the space above the track by these components, which is very conducive to the deployment and application of the lifting and lifting component 2. Among them, the first flexible belt 2091 passes through the wheel component 206 and then connects downward to the first side belt hanging part of the lifting platform component 3, and the second flexible belt 2092 is directly connected from the synchronous wheel downward to the second side belt hanging part of the lifting platform component 3.

[0126] Therefore, since the synchronous wheels, wheel passing components, etc. are all very small components, and are deployed on the outside of the space directly above the track, the lifting and lifting component 2 occupies very little space directly above the track, further reducing the height of the lifting and lifting component 2, making the lifting and lifting component 2 not easily restricted by the installation space in the height direction. At this time, the OHT suspended lifting system is more flexibly adapted to deployment applications above aerial tracks at different heights.

[0127] It should be noted that, as in the above example, since each gear mechanism in the transmission assembly can use miniaturized structural parts, and the servo motor outputs driving power through the reducer, the servo motor and the reducer can also be miniaturized components, so even if the lifting and lifting assembly 2 is deployed along the width direction of the track, the space occupied is also small. In addition, even if the servo motor (or even the reducer) occupies a large amount of height, the servo motor (or even the reducer) can be deployed outside the space directly above the track, and then the transmission can be achieved through the transmission shaft, which can still reduce the impact in the height direction, and is also convenient for the deployment and application of the OHT suspended lifting system.

[0128] In some embodiments, blocking structures are provided in the middle and at both ends of the winding drum 210, and the depth of the blocking structure is not less than the total thickness of the belt after it is retracted, so that the first flexible belt 2091 and the second flexible belt 2092 are always wound in the winding cavity formed by the blocking structure, so as to ensure the accuracy of the belt winding and improve the accuracy of the belt retraction and release.

[0129] refer to Figures 7 to 11 The winding drum 210 is sequentially provided with a first blocking portion 2101, a second blocking portion 2102 and a third blocking portion 2103; a winding cavity for the second flexible belt 2092 is formed between the first blocking portion 2101 and the second blocking portion 2102; and a winding cavity for the first flexible belt 2091 is formed between the second blocking portion 2102 and the third blocking portion 2103.

[0130] In some embodiments, considering that the OHT suspension lifting system is not frequently used, that is, the lifting platform assembly 3 usually needs to be retracted inside the OHT suspension lifting system for a long time, a corresponding power-off brake can be set on the transmission shaft of the winding drum 210.

[0131] refer to Figures 7 to 13 As shown in the figure, a power-off brake 211 is provided at one end of the winding shaft 208. When the winding drum 210 is winding or releasing the belt, the power-off brake 211 can be in a powered-on state without braking. When the winding drum 210 is no longer winding or releasing the belt, the power-off brake 211 can be in a powered-off state, thereby completing the braking of the winding drum 210 and preventing the lifting platform assembly 3 from falling downward due to the winding drum 210 being unable to keep the belt wound.

[0132] It should be noted that the power-off brake may be a brake that can control the braking and separation of the power shaft after direct current is passed through it and completes braking after power is lost, or it may be other forms of brakes.

[0133] In some embodiments, when the reel 210 is retracting and releasing the belt, if a possible belt winding failure is found, the reel 210 can be promptly held by the power-off brake 211 to prevent the reel 210 from over-releasing the belt due to the failure.

[0134] Therefore, by using a power-off brake, when the brake is configured to respond to at least one of power failure, stopping of belt retraction or abnormality, and promptly brake the first rotating shaft and / or the second rotating shaft, the brake can be fully utilized to have an excellent torque holding capability, and can perform reliable and long-term braking after the coil is normally stopped, and can perform temporary braking in time when a fault in the reel-up belt is detected, which is beneficial to the braking, stopping and free running of the reel-up belt, thereby improving the safety and reliability of the lifting and hoisting assembly 2.

[0135] In addition, although a brake is added, the brake is used to brake the reel, so a very small brake can be used. That is, the use of the brake in the system will not increase the size of the equipment too much. After adding the auxiliary guarantee function of the brake, the versatility, reliability and safety of the equipment are further improved.

[0136] In some embodiments, the power-off brake is preferably a brake with a manual release function, so that the friction plate can be loosened manually. Therefore, the manual release function is very convenient for manually braking, separating, etc., during the application deployment, maintenance, etc. of the lifting and hoisting assembly 2.

[0137] In some embodiments, a support bearing is used to support the transmission drive of the transmission assembly to the winding drum. Figures 7 to 13 As shown, the support bearing 213 is arranged on the winding shaft 208 of the winding drum 210 of the transmission assembly, wherein the support bearing 213 is used to provide bearing support for the winding drum 210 and the transmission assembly, and is installed and fixed on the lower surface of the ceiling installation assembly 1.

[0138] This application also provides an example of a lifting and lifting assembly, reference Figures 7 to 13 As shown in the figure, the belt lifting mechanism has four synchronous wheels 2022 arranged along the axial direction of the lifting shaft 212, wherein every two synchronous wheels form a group, each of which is engaged with the corresponding belt to support and tension the belt; the belt retracting mechanism has four reeling drums arranged along the axial direction of the reeling shaft 208, wherein every two reeling drums form a group, each of which is connected with the corresponding belt to reel in or release the belt; the belt assembly includes four belts, and the lifting and lifting assembly also includes two wheel assemblies 206.

[0139] like Fig.10 As shown in the figure, each of the four belts passes through the corresponding synchronous wheel 2022 one by one, and one end of each belt is connected to each winding drum 210 in the four winding parts one by one; the two over-wheel assemblies 206 are arranged at a preset distance from the lifting shaft 212 in the horizontal direction, so as to arrange and install the over-wheel assemblies 206 according to the connection needs of the lifting object, wherein the other ends of the two belts are connected to one end of the lifting object (i.e., the lifting platform assembly 3) in the horizontal direction at intervals; the other ends of the other two belts are connected to the other ends of the lifting object in the horizontal direction at intervals, and the other two belts are respectively meshed with one of the synchronous wheels after passing through the corresponding over-wheel assemblies. It should be noted that the above-mentioned horizontal direction is perpendicular to the lifting direction of the four belts.

[0140] Based on the same inventive concept, the present embodiment also provides an OHT suspension lifting system, wherein the lifting and lifting assembly in the OHT suspension lifting system includes the hoisting transmission assembly described in any of the aforementioned examples, or the OHT suspension lifting system includes the lifting and lifting assembly 2 described in any of the aforementioned examples. Figure 1 The lifting assembly 2 is arranged on the mounting plate (i.e. Figure 1 The lower side of the ceiling mounting assembly 1) marked in the figure; the lifting and lifting assembly 2 also includes a plurality of support bearings, wherein the first rotating shaft and the second rotating shaft are mounted on the mounting plate by means of the support bearings. It should be noted that the support bearings can refer to the schematic diagrams, for example, the support bearing 213 in the above example is used to support the winding shaft 210.

[0141] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0142] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A lifting and lowering assembly, characterized in that: Applied to OHT suspension lifting system, the lifting and lowering components include: at least one drive mechanism; A belt lifting mechanism having a first rotating shaft and at least one synchronous wheel arranged along the axial direction of the first rotating shaft; A belt retracting and unretracting mechanism, comprising a second rotating shaft and at least one retracting portion arranged along the axial direction of the second rotating shaft; as well as, A belt assembly, the belt assembly comprising at least one belt, wherein: A belt is passed around a synchronous wheel, and one end of the belt is connected to a winding portion, wherein the belt meshes with the synchronous wheel to form a wrap angle and is supported by the synchronous wheel so that the belt is kept taut between the synchronous wheel and the winding portion, and the other end of the belt is connected to the lifting object; The first rotating shaft is configured to be driven by a driving mechanism to rotate a synchronous wheel on the first rotating shaft, wherein the synchronous wheel drives a belt meshed with the synchronous wheel to lift or lower the lifting object; The second rotating shaft is configured to be driven by a driving mechanism to rotate a winding portion on the second rotating shaft, wherein the winding portion correspondingly connected to a belt winds up or releases the belt; The at least one driving mechanism includes a servo motor and a reducer connected to the servo motor, and the reducer drives the first rotating shaft and the second rotating shaft to rotate by means of a transmission component; The transmission assembly comprises: A first gear mechanism, wherein a gear rotation shaft of the first gear mechanism is connected to a speed reducer; A second gear mechanism and a belt pressing mechanism; wherein the second gear mechanism is connected to the first gear mechanism through gear transmission, and the second gear mechanism is connected to the first rotating shaft to drive the first rotating shaft to rotate; the belt pressing mechanism is pressed on a side wall of the at least one belt away from the synchronous wheel meshing with the belt, so that a wrap angle of a specified angle is formed between the belt and the synchronous wheel; A third gear mechanism, wherein the third gear mechanism is connected to the first gear mechanism through gear transmission, and the third gear mechanism is connected to the second rotating shaft to drive the second rotating shaft to rotate, and is used to drive the at least one winding portion to retract and release the belt; The first gear mechanism is used to synchronously drive the second gear mechanism and the third gear mechanism.

2. The lifting and lowering assembly according to claim 1, characterized in that: The OHT suspended lifting system comprises a docking track, and the transmission assembly is arranged outside just above the docking track and below the ceiling.

3. The lifting and lowering assembly according to claim 1, characterized in that: A clutch is connected between the second rotating shaft and the transmission assembly, and the transmission assembly and the clutch are configured to drive the first rotating shaft and the second rotating shaft to rotate synchronously at the same angular velocity, or to drive the first rotating shaft to rotate; The first rotation axis and the second rotation axis rotate in the same direction or in opposite directions.

4. The lifting and lowering assembly according to claim 3, characterized in that: The clutch is configured as: During the belt winding process, in response to the torque transmitted by the clutch being greater than or equal to the cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is cut off; in response to the torque transmitted by the clutch being less than the cut-off threshold, the transmission connection between the transmission assembly and the second rotating shaft is engaged; During the process of releasing the belt, the transmission connection between the transmission assembly and the second rotating shaft is engaged, or the transmission connection between the transmission assembly and the second rotating shaft is disconnected.

5. The lifting and lowering assembly according to claim 1, characterized in that: The belt lifting mechanism has four synchronous wheels arranged along the axial direction of the first rotating shaft, the belt retracting mechanism has four reeling parts arranged along the axial direction of the second rotating shaft, the belt assembly includes four belts, and the lifting and lifting assembly also includes two wheel assemblies, wherein: Each of the four belts is passed around the corresponding synchronous wheel one by one, and one end of each belt is connected to each of the four winding parts one by one; The two wheel assemblies are spaced apart from the first rotating axis by a preset distance in the horizontal direction; The other ends of the two belts are connected to one end of the lifting object in the horizontal direction at intervals; the other ends of the other two belts are connected to the other end of the lifting object in the horizontal direction at intervals, and the other two belts are respectively meshed with a synchronous wheel after passing through a corresponding one of the wheel assemblies; The horizontal direction is perpendicular to the lifting direction of the four belts.

6. The lifting and lowering assembly according to claim 1, characterized in that: The lifting and hoisting assembly also includes a brake connected to the first rotating shaft and / or the second rotating shaft, and the brake is configured to brake the first rotating shaft and / or the second rotating shaft in response to at least one of power failure, belt retraction and release stop, or abnormality.

7. The lifting and lowering assembly according to any one of claims 1 to 6, characterized in that: Each of the winding parts is a winding drum, wherein each of the winding drums is sequentially provided with a first blocking part and a second blocking part at two ends along the axial direction of the second rotating shaft, wherein a concave winding cavity is formed between the first blocking part and the second blocking part.

8. An OHT suspension lifting system, characterized in that: The OHT suspended lifting system includes a mounting plate and a lifting and lowering assembly as described in any one of claims 1 to 7, wherein the lifting and lowering assembly is arranged on the lower side of the mounting plate; the lifting and lowering assembly also includes a plurality of support bearings, wherein the first rotating shaft and the second rotating shaft are mounted on the mounting plate by means of the support bearings.

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