Power mechanism and fast rolling door

Abstract

This utility model discloses a power mechanism and a high-speed rolling door. The power mechanism includes: a power assembly, which includes a drive component and a conveyor belt connected by a transmission connection. The conveyor belt is used to fix and connect to an external structure. The drive component drives the conveyor belt to move, thereby moving the external structure. A transmission assembly includes a movable pulley, a fixed pulley, a connecting rope, and an elastic element. One end of the connecting rope is fixed, and the other end passes over the movable and fixed pulleys to fix and connect to the external structure. One end of the elastic element is fixed, and the other end is connected to the movable pulley, so that the elastic element can extend when the external structure moves forward, or return to its original position when the external structure moves backward. The high-speed rolling door includes: a door panel; a traction mechanism, which is fixedly connected to the door panel; and the other end of the connecting rope and the conveyor belt are both fixedly connected to the traction mechanism in the aforementioned power mechanism. This utility model features low driving power, which helps to reduce costs and increase service life.

Description

Technical Field

[0001] This utility model belongs to the field of roller shutter door technology, specifically relating to a power mechanism and a fast roller shutter door. Background Technology

[0002] High-speed rolling doors, also known as fast rolling shutters or high-speed doors, are popular due to their ability to open and close quickly, as well as their good sealing performance and high security. They are widely used in industrial plants, warehouses, production workshops, cold chain logistics, and other fields.

[0003] Existing high-speed rolling doors all achieve their opening and closing through a power mechanism combined with a traction mechanism. The traction mechanism is fixedly connected to the door panel, and the power mechanism includes a motor, a conveyor belt, a pulley system, and a spring-loaded component. The motor drives the conveyor belt to rotate, causing the traction mechanism to move upward, which in turn moves the door panel upward to open the rolling door. At this time, the upward movement of the door panel and the traction mechanism keeps the spring-loaded component in a stretched state through the pulley system. When the motor stops driving, the downward pulling force of the door combined with the rebound force of the spring-loaded component moves the door panel downward to close the rolling door. Because the spring-loaded component is in a stretched state when the rolling door is open, the motor's driving force must overcome not only the weight of the door panel but also the rebound force of the spring-loaded component. This results in a large driving force and output power for the motor, high cost, and is not conducive to the long-term use of the motor. Utility Model Content

[0004] One of the purposes of this invention is to disclose a power mechanism that helps reduce driving force and output power, thereby reducing costs and increasing service life.

[0005] The second objective of this utility model is to disclose a high-speed rolling door with low driving power, which helps to reduce costs and increase service life.

[0006] To achieve one of the above objectives, this utility model discloses a power mechanism, comprising: The power assembly includes a drive unit and a conveyor belt for transmission connection. The conveyor belt is used to fix the external structure, and the drive unit drives the conveyor belt to move so as to move the external structure. The transmission assembly includes a movable pulley, a fixed pulley, a connecting rope, and an elastic element. One end of the connecting rope is fixed, and the other end of the connecting rope passes over the movable and fixed pulleys to be used for fixed connection to the external structure. One end of the elastic element is fixed, and the other end of the elastic element is connected to the movable pulley to be used to drive the elastic element to extend when the external structure moves forward, or to reset the elastic element when the external structure moves in the opposite direction.

[0007] As an optional implementation, the drive component is connected to the conveyor belt via a transmission wheel set, which includes a driving wheel and a driven wheel. The output end of the drive component is connected to the driving wheel, and the driving wheel is connected to the driven wheel via the conveyor belt.

[0008] As an optional implementation, when the external structure moves downward to a preset position, the gravity of the external structure is greater than the rebound force of the elastic element.

[0009] As an optional implementation, a movable pulley and a fixed pulley are each provided, with the fixed pulley located above the movable pulley. The upper end of the connecting rope is fixed, and the lower end of the connecting rope passes down through the movable pulley and then up through the fixed pulley in sequence, for the purpose of fixing and connecting the external structure. The elastic element is located below the movable pulley, with its lower end fixed and its upper end connected to the movable pulley.

[0010] As an optional implementation, the transmission assembly also includes a guide member, through which the connecting rope passes, and the guide member is positioned near the fixed end of the connecting rope.

[0011] As an alternative implementation, the guide is fixed to the external structure, and the guide slides in conjunction with the connecting rope.

[0012] As an optional implementation, at least two elastic elements are arranged side by side, one end of each of the at least two elastic elements is fixed, and the other end of each of the at least two elastic elements is connected to a movable pulley, so as to drive the at least two elastic elements to extend synchronously when the external structure moves downward.

[0013] As an optional implementation, the elastic element and the movable pulley are connected by a connector, the movable pulley is connected to the connector, and the other ends of at least two elastic elements are connected to the connector.

[0014] As an optional implementation, at least two elastic members are limited by a fixing frame, which is sleeved on the outside of the at least two elastic members, and each elastic member is telescopically inserted through the fixing frame.

[0015] To achieve the second objective mentioned above, this utility model discloses a high-speed rolling door, comprising: Door panel; The traction mechanism is fixedly connected to the door panel. The aforementioned power mechanism has the other end of the connecting rope and the conveyor belt both fixedly connected to the traction mechanism; When the door panel moves downward to close, it causes the elastic element to extend. When the drive unit drives the conveyor belt to move the door panel upward via the traction mechanism to open, the elastic element returns to its original position.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The power mechanism of this invention can stretch the elastic element to store rebound force when the external structure moves forward. Then, when the driving component moves the external structure in the opposite direction via the conveyor belt, the rebound force of the elastic element assists in the reverse movement of the external structure. This achieves the goal of reverse movement of the external structure through the main drive of the driving component and the assistance of the elastic element, thereby reducing the driving force and output power of the driving component. This allows for the use of a low-power driving component, which helps reduce costs. Furthermore, the reduction in driving force and output power helps reduce wear and tear on the driving component, thus extending its service life.

[0017] This invention's high-speed rolling door, when closed, stretches an elastic element to store rebound force. This rebound force assists the door panel's upward movement as the drive unit moves the door panel upward via the conveyor belt and traction mechanism. This achieves the goal of opening the high-speed rolling door by coordinating the main drive unit with the elastic element's assistance, reducing the drive force and output power of the drive unit. Consequently, a lower-power drive unit can be used in the high-speed rolling door, reducing costs. Furthermore, the reduced drive force and output power help reduce wear and tear on the drive unit, thereby extending its service life and the overall lifespan of the high-speed rolling door. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the fast rolling door of this utility model; Figure 2 This is a schematic diagram of the cooperation structure between the power mechanism and the door panel of this utility model; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 3 Another structural diagram of the power mechanism; Figure 5 yes Figure 2 Enlarged view at point B in the middle; Figure 6 yes Figure 5 An exploded view of the main structure from another perspective; Figure 7 yes Figure 2 Enlarged view at point C; Figure 8 yes Figure 2 Enlarged view at point D; Figure 9 This is a structural schematic diagram of the elastic element and the fixing frame of this utility model; Figure 10 yes Figure 2 Enlarged view at point E in the middle; Figure 11 yes Figure 10 A schematic diagram of the power mechanism from another perspective.

[0020] Explanation of key figure labels: 1. Power assembly; 11. Drive unit; 12. Conveyor belt; 13. Transmission wheel assembly; 131. Driving wheel; 132. Driven wheel; 2. Transmission assembly; 21. Moving pulley; 22. Fixed pulley; 23. Connecting rope; 24. Elastic component; 25. Guide component; 3. Door panel; 4. Traction mechanism; 41. Traction block; 42. Connecting block; 43. Connecting block; 5. Fixing component; 51. Upper fixing component; 52. Lower fixing component; 6. Door frame; 7. Connecting component; 8. Fixing frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0027] Example 1 Please see Figure 2-3 , Figure 5 and Figure 7 As shown, this application embodiment provides a power mechanism, including a power component 1. The power component 1 includes a drive member 11 and a conveyor belt 12 that are connected by transmission. The conveyor belt 12 is used to fix and connect to an external structure. The drive member 11 drives the conveyor belt 12 to move so as to drive the external structure to move.

[0028] by Figure 2 The directions shown are "u" for upward and "p" for downward. The driving component 11 can be a motor, whose output shaft is connected to the conveyor belt 12. The motor drives the conveyor belt 12 to rotate, causing the connection point between the conveyor belt 12 and the external structure to move upward or downward, thereby driving the external structure to move upward or downward. For example, the external structure can be the door panel 3 of a high-speed rolling door. The conveyor belt 12 can be directly connected to the door panel 3. When the motor drives the conveyor belt 12 to rotate, the connection point between the conveyor belt 12 and the door panel 3 moves upward, thereby driving the door panel 3 upward and opening the high-speed rolling door. Alternatively, the external structure can be the door panel 3 of a high-speed rolling door and a traction mechanism 4. The traction mechanism 4 is fixedly connected to the door panel 3, and the conveyor belt 12 is fixedly connected to the traction mechanism 4. When the motor drives the conveyor belt 12 to rotate, the connection point between the conveyor belt 12 and the traction mechanism 4 moves upward, thereby driving the door panel 3 upward via the traction mechanism 4 and opening the high-speed rolling door.

[0029] The power mechanism also includes a transmission assembly 2, which includes a movable pulley 21, a fixed pulley 22, a connecting rope 23, and an elastic element 24. One end of the connecting rope 23 is fixed, and the other end of the connecting rope 23 passes around the movable pulley 21 and the fixed pulley 22 for fixing the external structure. One end of the elastic element 24 is fixed, and the other end of the elastic element 24 is connected to the movable pulley 21 for extending the elastic element 24 when the external structure moves forward, or for resetting the elastic element 24 when the external structure moves in the opposite direction.

[0030] For example, the connecting rope 23 can be a steel wire rope, with one end fixed to the fixing member 5 and the other end passing over the movable pulley 21 and the fixed pulley 22 before being fixed to the external structure. The elastic element 24 can be a spring, tension spring, etc., with one end fixed to the fixing member 5 and the other end fixed to the movable pulley 21. The external structure can be the door panel 3 of the fast rolling door or the traction mechanism 4 fixedly connected to the door panel 3. When a downward pulling force is applied to the external structure, such as the door panel 3, in conjunction with the gravity of the door panel 3 to close the fast rolling door, the other end of the connecting rope 23 fixed to the external structure, such as the door panel 3 or the traction mechanism 4, moves downward synchronously. After being reversed by the fixed pulley 22, it drives the movable pulley 21 to move upward, thereby putting the elastic element 24 in a stretched state. When the driving member 11 drives the conveyor belt 12 to rotate and causes the connection point of the conveyor belt 12 with the door panel 3 or the traction mechanism 4 to move upward, it can directly or indirectly drive the door panel 3 to move upward, realizing the opening of the fast rolling door. At this time, the elastic element 24 is not constrained by the tensile force, and its rebound force can drive the movable pulley 21 to move downward, so as to drive the other end of the connecting rope 23 to move upward after the fixed pulley 22 changes direction, thereby assisting the door panel 3 or the traction mechanism 4 to move upward, and realizing the opening of the assisted fast rolling door.

[0031] Based on this, the power mechanism of this embodiment can stretch the elastic element 24 to store rebound force when the external structure moves forward. Thus, when the drive element 11 drives the external structure to move backward via the conveyor belt 12, the rebound force of the elastic element 24 assists in the reverse movement of the external structure. This achieves the purpose of the drive element 11's main drive combined with the elastic element 24's assistance in achieving the reverse movement of the external structure, thereby reducing the driving force and output power of the drive element 11. Consequently, a low-power drive element 11 can be used in this power mechanism, which is beneficial for cost reduction. Furthermore, the reduction in the driving force and output power of the drive element 11 helps reduce wear and tear on the drive element 11, thereby increasing its service life.

[0032] In this embodiment, a fast rolling door is used as an example. Forward movement refers to the door panel 3 moving downward, and reverse movement refers to the door panel 3 moving upward.

[0033] It is worth noting that regardless of whether the external structure connected to the conveyor belt 12 is the door panel 3 or the traction mechanism 4, the connection point between the conveyor belt 12 and the external structure is always located on the same side as the connection point between the conveyor belt 12 and the motor drive throughout the entire movement process, and the movement path is the entire path of the external structure, such as the door panel 3, as it opens. The elastic member 24 is in a naturally extended state when the external structure is at its highest point. Throughout the downward movement of the external structure, the elastic member 24 is in a continuously stretched state, and the maximum stretch of the elastic member 24 must ensure that the external structure can move to its lowest point to guarantee the normal operation of the elastic member 24 and the normal up-and-down movement of the external structure. Furthermore, the power mechanism in this embodiment is described using the opening and closing of a fast-rolling door as an example; it is not limited to the opening and closing of fast-rolling doors, but can be applied to any external structure adapted to this movement path.

[0034] For power component 1, see [link / reference] Figure 4-5 and Figure 11 The drive unit 11 is connected to the conveyor belt 12 via a transmission wheel set 13. The transmission wheel set 13 includes a drive wheel 131 and a driven wheel 132. The output end of the drive unit 11 is connected to the drive wheel 131, and the drive wheel 131 is connected to the driven wheel 132 via the conveyor belt 12. The drive wheel 131 and the driven wheel 132 are spaced apart in the vertical direction. The drive wheel 131 may be located above the driven wheel 132, or the driven wheel 132 may be located above the drive wheel 131. In this embodiment, the driving member 11 and the driving wheel 131 are located at the top and are not lower than the uppermost position of the external structure when it moves upward. The driven wheel 132 is located at the bottom and is not lower than the lowermost position of the external structure when it moves downward. This ensures that when the driving member 11 drives the conveyor belt 12 to rotate through the transmission wheel set 13, the conveyor belt 12 can drive the external structure to complete the entire path of movement from the bottom to the top. When applied to a fast rolling door, this ensures that the door panel 3 can move from the bottom to the top, so that the fast rolling door can be fully opened.

[0035] The transmission wheel set 13, consisting of the driving wheel 131 and the driven wheel 132, enables the driving member 11 to drive the conveyor belt 12 to rotate stably and ensures the stable up-and-down movement of the conveyor belt 12 at the connection point with the external structure, thereby guaranteeing the stable up-and-down movement of the external structure. Both the transmission wheel set 13 and the driving member 11 are fixed to the fixing member 5. The fixing member 5 includes an upper fixing member 51 located above and a lower fixing member 52 located below. The driving member 11 is fixed to the upper fixing member 51, the driving wheel 131 is rotatably mounted on the upper fixing member 51, and the driven wheel 132 is rotatably mounted on the lower fixing member 52. The fixing member 5 ensures the stable assembly of the driving member 11 and the transmission wheel set 13, thereby guaranteeing the transmission effect of the conveyor belt 12.

[0036] For transmission component 2, when the external structure moves downward to the preset position, the weight of the external structure is greater than the rebound force of the elastic element. The downward movement of the external structure relies on the downward pulling force applied manually and the weight of the external structure itself. Generally, the downward pulling force applied manually only exists initially, giving the external structure an initial downward force. Subsequent downward movement of the external structure relies on its own weight. When the external structure moves downward, one end of the connecting rope 23 fixed to the external structure moves downward synchronously, driving the movable pulley 21 upward after being reversed by the fixed pulley 22. This causes the elastic element 24 to be in a state of continuous tension. Therefore, when the external structure moves downward, it needs to overcome the continuously increasing rebound force of the elastic element 24, and the rebound force of the elastic element 24 is at its maximum when the external structure moves downward to the preset position. Based on this, in order to ensure that the external structure can move downward smoothly and stay stably at the preset position, the weight of the external structure must be greater than the maximum rebound force of the elastic element 24 throughout the entire movement path, thereby enabling the external structure to move downward stably. For example, the door panel 3 of the external structure is a fast rolling door. The preset position is that the door panel 3 is at the bottom. The weight of the door panel 3 must be greater than the maximum rebound force of the elastic element 24. The maximum rebound force refers to the rebound force of the elastic element 24 when the door panel 3 moves downward to the fast rolling door in the fully closed state. Moreover, this rebound force is not the limit rebound force of the elastic element 24, so as to ensure the safety of the fast rolling door when it is closed.

[0037] As the external structure moves up and down, the extension and retraction of the elastic element 24 are achieved through the transmission of the movable pulley 21, the fixed pulley 22, and the connecting rope 23. The fixed pulley 22 is used to change the direction of the force, and the movable pulley 21 is used to save effort, the degree of effort saving being determined by the number of movable pulleys 21. For effort-saving considerations, two or more movable pulleys 21 can be provided, and the number of fixed pulleys 22 is determined by the connection position of the connecting rope 23 to the external structure and the number of movable pulleys 21, thereby achieving a significant effort saving. However, due to the large number of movable pulleys 21 and fixed pulleys 22, and the complex winding path of the connecting rope 23, the transmission assembly 2 has a complex structure, is inconvenient to assemble, and occupies a large amount of space.

[0038] Based on this, see Figure 2-3 , Figure 5 , Figure 7 and Figure 10In this embodiment, a movable pulley 21 and a fixed pulley 22 are each provided. The fixed pulley 22 is located above the movable pulley 21. The upper end of the connecting rope 23 is fixed, and the lower end of the connecting rope 23 passes downwards around the movable pulley 21 and then upwards around the fixed pulley 22 to securely connect to the external structure. An elastic element 24 is located below the movable pulley 21. The lower end of the elastic element 24 is fixed, and the upper end of the elastic element 24 is connected to the movable pulley 21 to drive the elastic element 24 to extend upwards when the external structure moves downwards. When a downward pulling force is applied to the external structure manually, combined with the gravity of the external structure, the lower end of the connecting rope 23 fixed to the external structure moves downwards synchronously. After being reversed by the fixed pulley 22, it drives the movable pulley 21 to move upwards, thereby causing the elastic element 24 to be stretched upwards. Because a movable pulley 21 is provided, it saves half the force, avoiding the need for manual application of a large downward pulling force to the external structure, and facilitating the downward movement of the external structure. Furthermore, since both the movable pulley 21 and the fixed pulley 22 are provided, the winding path of the connecting rope 23 is simple, which helps to simplify the structure of the transmission component 2, facilitates installation, and saves space. For example, when the power mechanism is applied to a high-speed rolling door, the external structure is the door panel 3 of the high-speed rolling door or the traction mechanism 4 fixedly connected to the door panel 3. The power mechanism is generally installed in the door frame 6 of the rolling door. The space inside the door frame 6 is small, and the transmission structure of one movable pulley 21 and one fixed pulley 22 occupies little space, is easy to install, and can achieve the purpose of saving effort. Only a small downward pulling force is needed to close the high-speed rolling door.

[0039] The fixed pulley 22 is rotatably fixed to the upper fixing member 51. The upper end of the connecting rope 23 is fixed to the upper fixing member 51 through a ring buckle structure. The lower end of the connecting rope 23 passes down through the lower end face of the movable pulley 21 and then up through the upper end face of the fixed pulley 22. It is then fixed to an external structure such as the door panel 3 or the traction mechanism 4 fixedly connected to the door panel 3 through a ring buckle structure.

[0040] To ensure stable transmission of the transmission assembly 2, not only do the two ends of the connecting rope 23 need to be fixed, but the movement path of the connecting rope 23 around the movable pulley 21 and the fixed pulley 22 also needs to have a certain degree of smoothness. (See reference...) Figure 2-6 The transmission assembly 2 also includes a guide member 25, through which the connecting rope 23 passes. The guide member 25 is positioned near the fixed end of the connecting rope 23. The guide member 25 can be a sheet-like or block-like structure, and it has a through hole running vertically through the structure. The upper end of the connecting rope 23 is fixed to the upper fixing member 51, and the other end of the connecting rope 23 passes through the through hole of the guide member 25, then passes downward around the lower end face of the movable pulley 21, and upward around the upper end face of the fixed pulley 22, before being fixed to the external structure. Thus, the guide member 25 can be used to guide the winding motion of the connecting rope 23, so that the connecting rope 23 is stably positioned and avoids deviation in the vertical direction, which would affect the stability of the vertical movement of the external structure.

[0041] Based on the connecting structure of the connecting rope 23, the upper end of the connecting rope 23 is fixed. The connecting rope 23 passes downwards over the movable pulley 21 and then upwards over the fixed pulley 22 to connect to the external structure, and the lower end of the connecting rope 23 moves up and down with the external structure. The external structure only moves in the vertical direction and does not shift in other directions. The fixed pulley 22 is fixed in position, so both the external structure and the fixed pulley 22 can limit the movement of the connecting rope 23. The movable pulley 21 is connected to the elastic element 24. When the movable pulley 21 moves up and down, it may shift in position due to the elastic force of the elastic element 24. Combined with the loop structure at the upper end of the connecting rope 23, it is easy for it to shift in position relative to the fixed element 51. Therefore, the connecting rope 23 between the upper end of the connecting rope 23 and the movable pulley 21 may shift during the movement, affecting the stable transmission. In this embodiment, the guide member 25 is positioned close to the fixed end of the connecting rope 23, which not only limits the connection rope 23 between the upper end of the connecting rope 23 and the movable pulley 21, but also prevents the movable pulley 21 from shifting, thereby limiting the connection rope 23 between the movable pulley 21 and the fixed pulley 22, achieving three benefits in one go.

[0042] It should be noted that the guide member 25 is fixedly installed. This fixed installation means that the guide member 25 does not move in any direction other than vertically, so as to ensure that the connecting rope 23 passes vertically downwards around the movable pulley 21. The guide member 25 can be completely fixed and will not displace in any direction, such as when the guide member 25 is fixed in the door frame 6 of a fast rolling door, to achieve stable guidance of the connecting rope 23. In this embodiment, the guide member 25 is fixed to the external structure, and the guide member 25 and the connecting rope 23 are in sliding engagement. The guide member 25 is fixed to the external structure by bolts or the like. The connecting rope 23 between the fixed end of the connecting rope 23 and the movable pulley 21 passes through the guide member 25, so that the guide member 25 can limit the movement of the connecting rope 23, and can drive the guide member 25 to move synchronously when the external structure moves up and down, so that the guide member 25 moves up and down relative to the connecting rope 23. The fixed connection between the guide member 25 and the external structure is beneficial to improving the strength of the external structure, thereby improving the stability of the vertical movement.

[0043] For elastic element 24, see [reference] Figure 7-10 The lower end of the elastic element 24 is fixedly connected to the lower fixing member 52 via a ring-shaped structure, and the upper end of the elastic element 24 is connected to the movable pulley 21 so as to extend and retract with the up and down movement of the movable pulley 21. The lower fixing member 52 fixes the lower end of the elastic element 24 so that when the movable pulley 21 moves upward, the elastic element 24 extends upward and keeps the lower end stationary, thereby ensuring the rebound force of the elastic element 24.

[0044] There may be one elastic element 24. When the external structure moves downward, the entire tension is borne by one elastic element 24, which can easily damage the elastic element 24.

[0045] In this embodiment, at least two elastic elements 24 are arranged side by side. One end of each elastic element 24 is fixed, and the other end of each elastic element 24 is connected to a movable pulley 21. This allows the elastic elements 24 to extend synchronously when the external structure moves downward. The lower ends of each elastic element 24 are fixed to the lower fixing member 52 via a ring structure, and the upper ends of each elastic element 24 are connected to the movable pulley 21. When the external structure moves downward, the lower end of the connecting rope 23 fixed to the external structure moves downward synchronously. After being reversed by the fixed pulley 22, the rope drives the movable pulley 21 upward, thereby continuously stretching the elastic elements 24. The tension during the downward movement of the external structure is shared by the elastic elements 24, significantly reducing the force on a single elastic element 24 and improving its service life. Furthermore, if one elastic element 24 is damaged, the other elastic elements 24 can continue to function, eliminating the need for frequent replacements.

[0046] There may be two, three, four or even more elastic elements 24. The number of elastic elements 24 depends on their characteristics and the force conditions, and no specific limit is made here.

[0047] At least two elastic elements 24 can be directly connected to the steel plate of the movable pulley 21 at their upper ends. When there are many elastic elements 24, the available connection positions on the steel plate are limited, which can easily lead to unstable connections and deformation of the elastic elements 24 in directions other than vertical. Based on this, in this embodiment, the elastic elements 24 and the movable pulley 21 are connected by a connector 7. The movable pulley 21 is connected to the connector 7, and the other ends of at least two elastic elements 24 are also connected to the connector 7. The connector 7 can be a sheet-like structure with connecting holes to facilitate the steel plate of the movable pulley 21 to pass through the corresponding connecting holes. The upper ends of at least two elastic elements 24 pass through the corresponding connecting holes through a ring structure, thereby realizing the connection between the elastic elements 24 and the movable pulley 21 through the connector 7. The connection 7 ensures that the movable pulley 21 and each elastic element 24 are arranged vertically, avoiding displacement due to squeezing or pulling, thereby achieving smooth movement of the external structure.

[0048] Furthermore, at least two elastic elements 24 are limited by a fixing frame 8, which is sleeved on the outside of the at least two elastic elements 24. Each elastic element 24 is telescopically inserted through the fixing frame 8. The fixing frame 8 is provided with guide holes in the vertical direction for each elastic element 24. The elastic element 24 passes through the corresponding guide holes, and its two ends are respectively connected to the lower fixing member 52 and the connecting member 7. The fixing frame 8 not only constrains each elastic element 24, but also facilitates its vertical limitation, thereby ensuring that each elastic element 24 only expands and contracts in the vertical direction, thus ensuring the smooth movement of the external structure.

[0049] The fixing bracket 8 is fixedly installed and can be fixed to an external structure. For example, the fixing bracket 8 can be fixed to the door frame 6 of the fast rolling door by bolts, etc., to ensure the limiting and fixing effect of the fixing bracket 8.

[0050] Example 2 Please see Figure 1-11 As shown, this application provides a fast rolling door, including a door panel 3, a traction mechanism 4, and a power mechanism as described in Embodiment 1. The traction mechanism 4 is fixedly connected to the door panel 3, and the other end of the connecting rope 23 and the conveyor belt 12 are both fixedly connected to the traction mechanism 4. When the door panel 3 moves downward to close the door, it causes the elastic element 24 to extend. When the driving member 11 drives the conveyor belt 12 to move the door panel 3 upward via the traction mechanism 4 to open the door, the elastic element 24 resets.

[0051] Door frames 6 are installed on both sides of door panel 3. The power mechanism and traction mechanism 4 are both installed inside door frames 6. Guide member 25 is fixed to traction mechanism 4. Upper fixing member 51, lower fixing member 52 and fixing frame 8 are all fixed inside door frames 6. Traction mechanism 4 includes traction block 41, connecting block 42 and connecting block 43. Traction block 41 and connecting block 43 are fixedly connected by connecting block 42. Traction block 41 is fixedly connected to door panel 3. Connecting block 42 is fixedly connected to conveyor belt 12. Connecting block 42 is fixedly connected to the other end of connecting rope 23.

[0052] Manually applying a downward pulling force to the door panel 3, combined with the weight of the door panel 3, closes the fast-rolling door. At this time, the lower end of the connecting rope 23 fixed to the connecting block 42 moves downward synchronously, so that after the fixed pulley 22 reverses direction, it drives the movable pulley 21 to move upward, thereby causing the elastic element 24 to extend. When the driving component 11 drives the transmission belt 12 of the mechanism to rotate through the transmission wheel set 13, the connection point of the transmission belt 12 with the connecting block 43 moves upward, so that the door panel 3 is driven upward through the traction mechanism 4, realizing the opening of the fast-rolling door. At this time, the elastic element 24 is not constrained by the tensile force, and its rebound force can drive the movable pulley 21 to move downward, so that after the fixed pulley 22 reverses direction, it drives the lower end of the connecting rope 23 to move upward, thereby driving the door panel 3 upward through the traction mechanism 4, realizing the assisted opening of the fast-rolling door.

[0053] Based on this, when the fast rolling door of this embodiment closes, it can stretch the elastic element 24 to store rebound force. Thus, when the drive element 11 drives the door panel 3 upward via the conveyor belt 12 and traction mechanism 4, the rebound force of the elastic element 24 assists the door panel 3 in moving upward. This achieves the purpose of opening the fast rolling door by cooperating with the drive element 11 for main drive and the elastic element 24 for assistance, thereby reducing the driving force and output power of the drive element 11. Consequently, a low-power drive element 11 can be used in the fast rolling door, which is beneficial for cost reduction. Furthermore, the reduction in the driving force and output power of the drive element 11 helps reduce wear and tear on the drive element 11, thereby increasing the service life of the drive element 11 and the service life of the fast rolling door.

[0054] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A power mechanism, characterized in that, include: A power assembly, comprising a drive component and a conveyor belt connected by a transmission, the conveyor belt being used to fixally connect to an external structure, the drive component driving the conveyor belt to move in order to move the external structure. A transmission assembly includes a movable pulley, a fixed pulley, a connecting rope, and an elastic element. One end of the connecting rope is fixed, and the other end of the connecting rope passes over the movable pulley and the fixed pulley to fix the external structure. One end of the elastic element is fixed, and the other end of the elastic element is connected to the movable pulley to extend the elastic element when the external structure moves forward, or to reset the elastic element when the external structure moves in the opposite direction.

2. The power mechanism according to claim 1, characterized in that: The driving component is connected to the conveyor belt via a transmission wheel set, which includes a driving wheel and a driven wheel. The output end of the driving component is connected to the driving wheel, and the driving wheel is connected to the driven wheel via the conveyor belt.

3. The power mechanism according to claim 1, characterized in that: When the external structure moves downward to the preset position, the gravity of the external structure is greater than the rebound force of the elastic element.

4. The power mechanism according to claim 1 or 3, characterized in that: Each of the movable pulley and the fixed pulley is provided, with the fixed pulley located above the movable pulley. The upper end of the connecting rope is fixed, and the lower end of the connecting rope passes downwards around the movable pulley and then upwards around the fixed pulley in sequence, for the purpose of fixing and connecting the external structure. The elastic element is located below the movable pulley, with its lower end fixed and its upper end connected to the movable pulley.

5. The power mechanism according to claim 1 or 3, characterized in that: The transmission assembly also includes a guide member, through which the connecting rope passes, and the guide member is positioned near the fixed end of the connecting rope.

6. The power mechanism according to claim 5, characterized in that: The guide is fixed to the external structure, and the guide slides in conjunction with the connecting rope.

7. The power mechanism according to claim 1 or 3, characterized in that: At least two elastic elements are arranged side by side, one end of each of the at least two elastic elements is fixed, and the other end of each of the at least two elastic elements is connected to the movable pulley, so as to drive the at least two elastic elements to extend synchronously when the external structure moves downward.

8. The power mechanism according to claim 7, characterized in that: The elastic element and the movable pulley are connected by a connector, the movable pulley is connected to the connector, and the other end of at least two of the elastic elements is connected to the connector.

9. The power mechanism according to claim 7, characterized in that: At least two of the elastic elements are limited by a fixing frame, which is sleeved on the outside of the at least two elastic elements, and each elastic element is telescopically inserted through the fixing frame.

10. A high-speed rolling door, characterized in that, include: Door panel; A traction mechanism, which is fixedly connected to the door panel; The power mechanism according to any one of claims 1-9, wherein the other end of the connecting rope and the conveyor belt are both fixedly connected to the traction mechanism; When the door panel moves downward to close, it causes the elastic element to extend. When the drive unit drives the conveyor belt to move the door panel upward via the traction mechanism to open, the elastic element returns to its original position.

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