Reinforced locking type ventilation device

Abstract

The application relates to a reinforced locking type ventilation and exhaust device and relates to the field of ventilation and exhaust devices. The device comprises a base, a ventilation opening being formed in the base; a baffle plate, which is movably arranged on the base and is used for closing or opening the ventilation opening; a driving device, which is arranged between the base and the baffle plate and is used for driving the baffle plate to open and close; and a locking device, which is arranged on the base. The locking device is configured to lock the baffle plate to the base when the baffle plate closes the ventilation opening, so that external force acting on the baffle plate is isolated from the driving device. The application can improve the sealing effect of the baffle plate on the ventilation opening when the baffle plate is closed and external load is borne, and can reduce the influence of the external load on internal transmission components.

Description

Technical Field

[0001] This application relates to the field of ventilation devices, and more particularly to a reinforced locking ventilation device. Background Technology

[0002] Ventilation systems are widely used in building ventilation, industrial plants, clean rooms, tunnel ventilation, and various equipment cabinets to achieve air circulation and regulation. Common ventilation systems include louvers, dampers, and ventilation doors, and their core function is to open or close ventilation openings as needed to achieve ventilation or airflow isolation.

[0003] In existing technologies, ventilation systems typically include a base, a baffle, and a drive mechanism. A ventilation opening is formed on the base, the baffle is movably mounted on the base, and the drive mechanism is positioned between the base and the baffle to open and close the baffle. When ventilation is needed, the drive mechanism moves the baffle, opening the ventilation opening; when closing is needed, the drive mechanism moves the baffle back to its original position, sealing the ventilation opening and achieving a seal.

[0004] However, existing ventilation systems have the following problems in practical applications: When the baffle is closed, if it is subjected to external forces such as impact, wind pressure changes, or accidental collisions, these forces will be directly transmitted to the drive unit or transmission components. Since the drive unit and its transmission components are usually designed to withstand the driving force during operation, rather than the external load after the baffle is closed, long-term exposure to external forces can easily lead to deformation, wear, or even damage to the internal transmission components, seriously affecting the service life and reliability of the system. Summary of the Invention

[0005] In order to improve the sealing effect of the baffle on the ventilation opening and reduce the impact of external load on the internal transmission components when the baffle is closed and subjected to external load, this application provides a reinforced locking ventilation device.

[0006] The reinforced locking ventilation device provided in this application adopts the following technical solution: A reinforced locking ventilation device includes: a base with a ventilation opening thereon; a baffle movably disposed on the base for closing or opening the ventilation opening; a drive device disposed between the base and the baffle for driving the baffle to open or close; and a locking device disposed on the base. The locking device is configured to lock the baffle to the base when the baffle closes the ventilation opening, so as to bear the external force acting on the baffle and isolate the external force from the drive device.

[0007] By adopting the above technical solution, a locking device is installed on the base, which locks the baffle to the base when the baffle closes the ventilation opening. This allows the locking device to bear the external force acting on the baffle, thereby reducing the force transmitted to the drive device. This effectively alleviates the problem of damage to the drive device caused by the direct action of external force on the drive components, and helps to improve the reliability and service life of the ventilation device.

[0008] Optionally, the baffle is connected to the base via one or more sets of linkage mechanisms. Each link in the linkage mechanism is hinged at one end to the baffle and at the other end to the base. The linkage mechanism is configured to realize the translation of the baffle.

[0009] By adopting the above technical solution, the baffle is connected to the base through one or more sets of linkage mechanisms and realizes translation, so that the baffle always remains parallel to the end face of the ventilation opening during the opening and closing process, avoiding the problems of interference or poor sealing caused by rotation, and improving the smoothness of movement and sealing effect.

[0010] Optionally, the linkage mechanism includes a driving link and a driven link. The driving link in each linkage mechanism is hinged to the base through the same pivot, and the pivot is fixedly connected to the corresponding driving link. The drive device is used to drive the pivot to rotate.

[0011] By adopting the above technical solution, the corresponding links in each linkage mechanism are hinged to the base through the same rotating shaft. The drive device drives the rotating shaft to rotate, which can synchronously drive multiple sets of links to move, realizing multi-point synchronous drive. The structure is simple and compact, with high transmission efficiency, ensuring the synchronicity and stability of the baffle movement.

[0012] Optionally, the drive unit includes a drive motor mounted on the base, with the output shaft of the drive motor being drivenly connected to the rotating shaft.

[0013] By adopting the above technical solution, a drive motor is used as the power source. The rotational motion of the motor is directly transmitted to the connecting rod through a rotating shaft and a connecting rod. The transmission path is short and the response is fast, which makes it easy to control the opening and closing position of the baffle.

[0014] Optionally, a worm gear is coaxially fixedly connected to the output shaft of the drive motor, and a worm wheel is rotatably connected to the base, with the worm wheel and worm gear meshing with each other, and the worm wheel drive is connected to the rotating shaft.

[0015] By adopting the above technical solution and using a worm gear transmission structure, the self-locking characteristic of the worm gear is utilized so that the shaft cannot rotate in the reverse direction when the drive motor stops working, allowing the baffle to be stably maintained in either the open or closed position, thereby enhancing the safety and position holding capability of the device.

[0016] Optionally, the worm gear is connected to the rotating shaft via a gear set to adjust the transmission ratio.

[0017] By adopting the above technical solution, the worm gear is connected to the rotating shaft through a gear set. The transmission ratio can be adjusted by selecting different gear ratios according to actual needs, making the selection of the drive motor more flexible and adaptable to baffles of different weights and sizes, thus expanding the applicability of the device.

[0018] Optionally, the locking device includes a first latch directly or indirectly mounted on the baffle and a second latch slidably mounted on the base. The base is provided with a control component for controlling the movement of the second latch. When the baffle is closed, the control component can drive the second latch to engage with the first latch.

[0019] By adopting the above technical solution, a locking structure in which the first and second latches interlock is used. The control component drives the second latch to move to achieve locking and unlocking. The structure is simple, the operation is reliable, and it is easy to cooperate with the drive device to achieve automated control.

[0020] Optionally, the control component includes a drive shaft rotatably connected to the base, a second latch slidably mounted on the base via a slide, a cam fixedly connected to the drive shaft, and a receiving groove for accommodating the cam on the slide. When the baffle is closed, the rotation of the cam can push against the wall of the receiving groove to drive the slide to slide back and forth, thereby causing the second buckle to move closer to or away from the corresponding first buckle.

[0021] By adopting the above technical solution, a drive structure with a cam and a slide is used. When the cam rotates, it pushes against the wall of the receiving groove to drive the slide to move back and forth. The structure is compact and the motion trajectory is precise. The position of the latch can be precisely controlled by controlling the rotation angle of the cam.

[0022] Optionally, the drive shaft is a rotating shaft connected to the drive device. A rotatable sleeve is fitted on the rotating shaft at the position corresponding to the active connecting rod. The sleeve is fixedly connected to the corresponding active connecting rod. A groove with a circumferentially limited length is provided on the rotating shaft at the position corresponding to the sleeve. A protrusion extending into the groove is fixedly connected to the sleeve. The groove and the protrusion cooperate to form a preset angle of free travel, so that the rotating shaft can rotate relative to the active connecting rod at a preset angle. This is used to drive the second latch to engage or disengage with the first latch by rotating the rotating shaft when the baffle closes the ventilation opening.

[0023] By adopting the above technical solution, the drive shaft uses the same rotating shaft that is connected to the drive device. The idle stroke at a preset angle is formed by the cooperation of the groove and the protrusion, so that the same drive motor can control the action of the locking device and drive the opening and closing of the baffle. There is no need to set up an additional independent drive source, which simplifies the structure, reduces the cost, and ensures the sequence of locking and opening.

[0024] Optionally, at least one of the first and second latches is a resilient latch.

[0025] By adopting the above technical solution, at least one of the first and second latches is an elastic latch, which can absorb the matching error between the first and second latches when the baffle is closed, and at the same time play a buffering role during the latching process, reducing wear caused by rigid collision.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By installing a locking device on the base, the baffle is locked to the base when the vent is closed. When the baffle is subjected to external forces such as external impact or wind pressure changes, the locking device directly bears the force, reducing the transmission of the force to the drive unit. This effectively alleviates the problem of damage to the drive unit caused by external forces in the prior art, and helps to improve the service life and operational reliability of the device. 2. The locking device and the baffle are driven by the same rotating shaft. The rotating shaft is provided with a groove, and the protrusion on the sleeve extends into the groove to form a free stroke at a preset angle. The rotating shaft drives the cam on it to rotate, so as to drive the locking device to complete the snap-fit ​​or separation, and then drive the baffle to open and close. This design does not require a separate drive source for the locking device. 3. At least one of the first and second latches is set as an elastic latch. When the second latch reaches the locking position before the first latch, during the closing process of the baffle, the elastic latch uses elastic deformation to allow the latch to smoothly pass the interference position. After the baffle is fully closed, the first and second latches are aligned, and the elastic latch automatically recovers to achieve engagement. This mechanism effectively absorbs assembly tolerances and motion errors, and at the same time improves the success rate of engagement between the first and second latches. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the structure of the ventilation opening in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram illustrating the structure of the linkage mechanism in the embodiments of this application.

[0030] Figure 4 This is a schematic diagram illustrating the structure of the locking device in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram illustrating the structure of the drive motor in an embodiment of this application.

[0032] Figure 6 This is an exploded view of the drive motor, worm gear, worm wheel, and gear set used in the embodiments of this application.

[0033] Figure 7This is a schematic diagram illustrating the structure of the slide in an embodiment of this application.

[0034] Figure 8 This is a schematic diagram illustrating the structure of the first buckle in an embodiment of this application.

[0035] Figure 9 This is a schematic diagram illustrating the structure of the second buckle in an embodiment of this application.

[0036] Figure 10 This is a structural schematic diagram illustrating the open state of the baffle in an embodiment of this application.

[0037] Figure 11 This is a schematic diagram illustrating the structure of the protrusions and grooves in an embodiment of this application.

[0038] Figure 12 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0039] Explanation of reference numerals in the attached drawings: 10, base; 11, vent; 12, fan; 13, baffle; 14, driving link; 15, driven link; 16, shaft; 20, drive motor; 21, worm gear; 22, worm wheel; 23, gear set; 30, first latch; 31, second latch; 32, slide; 33, cam; 34, receiving groove; 40, sleeve; 41, protrusion; 42, groove; 43, first contact surface; 44, second contact surface; 50, roller; 51, slider; 52, tension spring. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0041] This application discloses a reinforced, locking ventilation device. For example... Figure 1 and Figure 2 The reinforced locking ventilation device includes a base 10, which serves as the mounting foundation for the entire device. It is typically used for vertical installation at the ventilation port on the side wall of a target device, such as a power distribution cabinet or energy storage container. One or more ventilation openings 11 are provided on the base 10 to allow airflow between the inside and outside of the target device. The base 10 can be constructed by welding and assembling metal plates or profiles to ensure good structural strength. In this embodiment, the base 10 has one ventilation opening 11, and one or more fans 12 of the desired model can be selectively installed within the ventilation opening 11, or no fans 12 may be configured.

[0042] A baffle 13 is movably mounted on the base 10 and is used to close or open the vent 11. The shape of the baffle 13 matches the vent 11, and it is typically a flat plate structure. A sealing gasket is provided on the side of the baffle 13 facing the vent 11 to improve the sealing effect of the baffle 13 on the vent 11.

[0043] like Figure 3 and Figure 4 The baffle 13 is connected to the base 10 via one or more linkage mechanisms. Each linkage mechanism includes multiple links, each hinged at one end to the baffle 13 and at the other end to the base 10. The linkage mechanism is configured such that the baffle 13 maintains translational motion or near-translational motion during opening or closing. This translational motion means that the baffle maintains its position without flipping during movement, or reduces the flipping angle during movement. By replacing flipping with translational motion, the required movement space for the baffle 13 during opening and closing is reduced. This is suitable for situations where the ventilation device is obstructed or lacks sufficient space.

[0044] In this embodiment, two sets of linkage mechanisms are provided, and the two sets of linkage mechanisms are symmetrically arranged on both sides of the baffle 13 to ensure that the baffle 13 moves smoothly.

[0045] In the linkage mechanism connection scheme, each linkage mechanism includes one active linkage 14 and at least one passive linkage 15. The active linkages 14 and passive linkages 15 correspond to each other in multiple linkage mechanisms. The plane containing the hinge axes at both ends of the active linkage 14 is parallel to the plane containing the hinge axes at both ends of the passive linkage 15. The axial distance between the hinge axes at both ends of the active linkage 14 is equal to the axial distance between the hinge axes at both ends of the passive linkage 15, thus forming a parallelogram-like four-bar structure between the baffle 13 and the base 10 to achieve the translation of the baffle 13.

[0046] like Figure 4 , Figure 5 as well as Figure 6 A drive unit is positioned between the base 10 and the baffle 13 to drive the baffle 13 to open and close. Specifically, the drive unit includes a drive motor 20 mounted on the base 10. The active links 14 of each linkage mechanism are hinged to the base 10 via the same rotating shaft 16. This rotating shaft 16 and each active link 14 can be relatively fixed. The output shaft of the drive motor 20 is connected to the rotating shaft 16. By rotating the rotating shaft 16, each active link 14 is driven to swing. Under the linkage of the active links 14 and the driven links 15, the baffle 13 is opened or closed. The drive motor 20 can be a stepper motor, a servo motor, or a conventional geared motor, selected according to the application scenario.

[0047] The output shaft of the drive motor 20 can be directly connected to the rotating shaft 16, or connected to one end of the rotating shaft 16 through other transmission components. In this embodiment, a worm gear 21 is coaxially fixedly connected to the output shaft of the drive motor 20, and a worm wheel 22 is rotatably connected to the base 10. The worm wheel 22 meshes with the worm gear 21, and the worm wheel 22 is driven by the rotating shaft 16. The worm wheel 22 and worm gear 21 transmission has a self-locking characteristic. When the drive motor 20 stops working, the rotating shaft 16 cannot rotate in the opposite direction, thereby enabling the baffle 13 to be stably maintained in either the open or closed position, enhancing safety.

[0048] Based on this, the worm gear 22 can also be connected to the rotating shaft 16 via the gear set 23. The gear set 23 can include multiple meshing gears. The transmission ratio can be adjusted by selecting different gear ratios. The worm gear 22 is coaxially fixedly connected to the primary gear of the gear set 23, and the rotating shaft 16 is coaxially fixedly connected to the final gear of the gear set 23, so as to match different baffle weights and opening speed requirements, making the selection of the drive motor 20 more flexible.

[0049] like Figure 7 and Figure 8 A locking device is provided on the base 10, which locks the baffle 13 to the base 10 when the baffle 13 is in the closed state of the ventilation opening 11. The locking device is configured to bear the external force acting on the baffle 13, thus isolating the external force from the drive device. Specifically, when the baffle 13 is in the closed state, if the baffle 13 is subjected to external impact, wind pressure or other external forces, the external force is first transmitted to the locking device and borne by the locking device, and will not act directly on the drive device or transmission components, thereby reducing the damage to the drive device or transmission components due to excessive force and improving the reliability and service life of the device. In the embodiment of this application, this reduces the wear of the gears in the gear set 23 and the wear between the worm gear 22 and the worm 21.

[0050] In this embodiment, the locking device includes a first buckle 30 and a second buckle 31 slidably disposed on the base 10. The first buckle 30 is directly or indirectly installed on the baffle 13. In this embodiment, the first buckle 30 is fixedly connected to the driven link 15. The base 10 is provided with a control component for controlling the movement of the second buckle 31.

[0051] like Figure 8 and Figure 9 Both the first buckle 30 and the second buckle 31 have a locking position. The opening and closing of the baffle 13 is used to control the first buckle 30 to move to the locking position or away from the locking position. When the baffle 13 is closed, the first buckle 30 is in the locking position. As the baffle 13 gradually opens, the driven link 15 drives the first buckle 30 to gradually move away from the locking position.

[0052] The control component controls the movement of the second latch 31 to or away from the locking position. When the baffle is closed, the first latch 30 moves to the locking position along with the baffle 13 and the driven link 15. The control component then drives the second latch 31 to the locking position, allowing the second latch 31 in the locking position to engage with the first latch 30 in the locking position. The control component then disengages the second latch 31 from the locking position, moving it away from the first latch 30 and releasing the engagement.

[0053] like Figure 7 and Figure 9 The specific structure of the control component is as follows: The control component includes a drive shaft rotatably connected to the base 10, and a slide block 32 slidably disposed on the base 10 along a linear guide rail / guide groove. The second latch 31 is mounted on the slide block 32 and moves together with the slide block 32. A cam 33 is fixedly connected to the drive shaft, and the slide block 32 is provided with a receiving groove 34 for accommodating the cam 33, with the cam 33 located within the receiving groove 34. When the drive shaft rotates, the cam 33 rotates with it, and the contour curve of the cam 33 pushes against the groove wall of the receiving groove 34, thereby driving the slide block 32 to slide back and forth in a preset direction, so that the second latch 31 moves closer to or away from the locking position, so that the second latch 31 and the first latch 30 can engage and disengage.

[0054] like Figure 10 and Figure 11 The drive shaft can be driven independently or by the aforementioned drive motor 20. In this embodiment, the drive shaft is the rotating shaft 16, which is driven to rotate by the aforementioned drive motor 20. Specifically, a groove 42 is provided on the rotating shaft 16 corresponding to the position of the active connecting rod 14. A sleeve 40 is fixedly connected to one end of the active connecting rod 14 near the rotating shaft 16. The sleeve 40 is fitted onto and rotatably disposed on the rotating shaft 16. A protrusion 41 extending into the corresponding groove 42 is fixedly connected to the sleeve 40. The rotating shaft 16 can rotate relative to the sleeve 40 by a preset angle, which is determined by the circumferential length of the groove 42.

[0055] like Figure 11 and Figure 12 The two contact surfaces in the groove 42 that abut against the protrusion 41 are respectively referred to as the first contact surface 43 and the second contact surface 44. The protrusion 41 on the sleeve 40 extends into the groove 42. When the rotating shaft 16 rotates, it drives the sleeve 40 to rotate, so that when the first contact surface 43 pushes against the protrusion 41, the drive baffle 13 opens. When the rotating shaft 16 drives the sleeve 40 to rotate in the opposite direction, so that when the second contact surface 44 pushes against the protrusion 41, the drive baffle 13 closes and seals the vent 11.

[0056] like Figure 7 and Figure 10Of the first latch 30 and the second latch 31, at least one is an elastic latch. The elastic latch can be made of a metal material or engineering plastic with a certain elasticity, or it can be a mechanism similar to a spring pin. In this embodiment, the first latch 30 is fixedly connected to the driven link 15, and only the second latch 31 is an elastic latch. Specifically, the second latch 31 includes a slider 51 that is slidably disposed on the slide block 32 along the linear guide rail / guide groove. A roller 50 for engaging with the first latch 30 is rotatably connected to the slider 51. A tension spring 52 is connected between the slider 51 and the slide block 32. The tension spring 52 is used to drive the roller 50 to engage with the first latch 30 when the baffle 13 is closed.

[0057] The first latch 30 is provided with a guide slope for guiding the roller 50. During the closing process of the baffle 13, if the second latch 31 moves to the locking position before the first latch 30, when the baffle 13 is close to closing, the guide slope pushes the roller 50 to overcome the elastic force of the tension spring 52, so that the roller 50 moves away from the first latch 30. When the baffle 13 is fully closed, the roller 50 passes the first latch 30. At this time, the roller 50 is reset under the elastic force of the tension spring 52 and engages with the first latch 30.

[0058] like Figure 8 and Figure 9 With the baffle 13 closed and the ventilation opening 11 sealed, the protrusion 41 on the sleeve 40 abuts against the second contact surface 44, and the roller 50 of the second latch 31 and the first latch 30 are both in the locked position and engaged with each other, forming a locked state for the baffle 13. In this state, the external force borne by the baffle 13 is isolated from the drive device, reducing the problem of the force being transmitted to the transmission mechanism when the baffle 13 is subjected to external load, thus preventing damage to the transmission mechanism. The transmission mechanism is either the gear set 23 or the worm gear 22 and worm 21.

[0059] During the opening and unlocking process of the baffle 13, the drive motor 20 drives the rotating shaft 16 to rotate at a preset angle. During this process, due to the relative movement of the protrusion 41 within the groove 42, i.e., the rotation of the rotating shaft 16, the second contact surface 44 gradually moves away from the protrusion 41, while the first contact surface 43 gradually moves closer to the protrusion 41. During this process, the idling of the rotating shaft 16 does not drive the sleeve 40 and the active connecting rod 14 to rotate, and the baffle 13 remains closed. During the idling process of the rotating shaft 16, it drives the cam 33 on it to rotate, thereby driving the slide 32 to move and causing the second latch 31 to gradually move away from the locking position, so that the second latch 31 and the first latch 30 separate from each other. When the rotating shaft 16 continues to rotate beyond the preset angle, the first contact surface 43 of the groove 42 abuts against the protrusion 41, thereby pushing the sleeve 40 and the active connecting rod 14 to rotate, causing the baffle 13 to gradually open.

[0060] like Figure 8 and Figure 10During the closing process of the baffle 13, the drive motor 20 drives the rotating shaft 16 to rotate in the opposite direction. During this process, the baffle 13 rotates with the rotating shaft 16 under the action of gravity and gradually closes. At the same time, the rotating shaft 16 drives the cam 33 on it to rotate in the opposite direction, so as to drive the slide 32 to move in the opposite direction, and the roller 50 of the second latch 31 gradually moves to the locking position. Since the rotating shaft 16 can rotate at a preset angle relative to the sleeve 40, the rotating shaft 16 may have a period of free rotation when the baffle 13 approaches the vent 11. Therefore, the second latch 31 may move to the locking position before the first latch 30. By setting the second buckle 31 as an elastic buckle, during the process of the second contact surface 44 of the groove 42 pushing the protrusion 41 to completely close the baffle 13, the guide slope pushes the roller 50 to overcome the elastic force of the tension spring 52, causing the roller 50 to move away from the first buckle 30. During this process, the tension spring 52 undergoes elastic deformation. When the baffle 13 is completely closed, the roller 50 passes over the first buckle 30, so that the first buckle 30 and the roller 50 of the second buckle 31 can be smoothly engaged in place. The tension spring 52 returns to its original state, achieving the locking effect between the first buckle 30 and the roller 50 of the second buckle 31.

[0061] In addition, the second latch 31 is a flexible latch, which can absorb a certain amount of assembly error and motion error, reduce the requirements for the motion accuracy of each component, and at the same time play a buffering role during the latching process, reducing noise and wear caused by rigid collision.

[0062] The specific operating principle of the embodiment is as follows: When the baffle 13 is fully open, the protrusion 41 presses against the first contact surface 43 under the action of the baffle 13's own weight.

[0063] Closing process of baffle 13: When baffle 13 is closed, drive motor 20 drives rotating shaft 16 to rotate. After rotating shaft 16 starts to rotate, due to the gravity of baffle 13, protrusion 41 initially supports the first contact surface 43. During the rotation of rotating shaft 16, under the gravity of baffle 13, protrusion 41 on sleeve 40 can almost remain in contact with the first contact surface 43, so that rotating shaft 16 and active connecting rod 14 rotate synchronously, thereby driving baffle 13 to move in the closing direction. At the same time, cam 33 on rotating shaft 16 drives slide 32 to move, driving second latch 31 to move in the locking position.

[0064] Ideally, when the baffle 13 is attached to the base 10 to close the vent 11, the first latch 30 on the driven link 15 reaches the locking position. Then, the rotating shaft 16 rotates freely, causing the first contact surface 43 to move away from the protrusion 41, while the second contact surface 44 approaches the protrusion 41. During this process, the cam 33 drives the slide 32 to move, causing the second latch 31 to move continuously towards the locking position until the second latch 31 engages with the first latch 30, thus achieving the locking effect on the baffle 13.

[0065] In practice, during the process of closing the baffle 13 until the sealing ring approaches the base 10, the baffle 13 may be subject to the compression resistance of the sealing ring, motion inertia, or external disturbances, and the movement speed of the baffle 13 may change instantaneously. Since the protrusion 41 can move freely between the first contact surface 43 and the second contact surface 44, the protrusion 41 may briefly leave the first contact surface 43 and slide relative to the groove 42, causing the connecting rod corresponding to the baffle 13 to move relative to the rotating shaft 16 within a certain preset angle range, which is 30°. This structural characteristic may cause the first latch 30 to reach the locking position later than the second latch 31.

[0066] When the first latch 30 reaches the locking position later than the second latch 31, the first latch 30 has not yet moved to the locking position with the baffle 13. At this time, since the second latch 31 is an elastic latch, when the two come into contact, the first latch 30 pushes the roller 50 of the second latch 31, causing the tension spring 52 to elastically deform until the roller 50 of the second latch 31 successfully passes the interference position of the first latch 30. As the baffle 13 continues to close, when the roller 50 of the second latch 31 successfully passes the interference position of the first latch 30, the tension spring 52 corresponding to the second latch 31 recovers its deformation under the action of elastic force, causing the first latch 30 to gradually move until it is fully engaged with the roller 50 of the second latch 31, and the two are firmly locked together.

[0067] After the baffle 13 is fully closed, the drive motor 20 stops, and the locking device bears the external force acting on the baffle 13, thus isolating the external force from the drive device.

[0068] Opening process of baffle 13: When baffle 13 is opened, drive motor 20 rotates in the opposite direction, driving shaft 16 to rotate in the opposite direction. During the rotation of shaft 16, the second contact surface 44 in groove 42 gradually moves away from protrusion 41, and the first contact surface 43 gradually moves closer to protrusion 41.

[0069] During this stage, the cam 33 on the rotating shaft 16 rotates synchronously with the rotating shaft 16. The cam 33 engages with the receiving groove 34 on the slide block 32, driving the slide block 32 to move in the opposite direction, causing the roller of the second latch 31 to gradually disengage from the first latch 30. When the protrusion 41 approaches or abuts the first contact surface 43, the roller of the second latch 31 completely disengages from the first latch 30, thus unlocking the device.

[0070] As the shaft 16 continues to rotate, the first contact surface 43 contacts and pushes the protrusion 41, which in turn drives the active connecting rod 14 to swing in the opposite direction through the sleeve 40. The active connecting rod 14 pushes the baffle 13 to move away from the base 10, and the baffle 13 gradually opens.

[0071] After the baffle 13 is fully opened, the protrusion 41 remains pressed against the first contact surface 43 under its own gravity, the drive motor 20 stops, and the device returns to the open state.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforced locking type ventilation device, characterized by, include: A base (10) with a ventilation opening (11) on it; A baffle (13) is movably mounted on the base (10) for closing or opening the vent (11). A driving device is disposed between the base (10) and the baffle (13) for driving the baffle (13) to open and close; A locking device is provided on the base (10); The locking device is configured to lock the baffle (13) to the base (10) while the baffle (13) is closing the vent (11), so as to bear the external force acting on the baffle (13) and isolate the external force from the drive device.

2. The reinforced locking type air supply and exhaust device according to claim 1, characterized in that: The baffle (13) is connected to the base (10) by one or more sets of linkage mechanisms. Each link in the linkage mechanism is hinged at one end to the baffle (13) and at the other end to the base (10). The linkage mechanism is configured to realize the translation of the baffle (13).

3. A reinforced locking type air supply and exhaust device according to claim 2, wherein: The linkage mechanism includes an active link (14) and a driven link (15). The active link (14) in each linkage mechanism is hinged to the base (10) through the same rotating shaft (16). The rotating shaft (16) is fixedly connected to the corresponding active link (14). The driving device is used to drive the rotating shaft (16) to rotate.

4. The reinforced locking type air supply and exhaust device according to claim 3, characterized in that: The driving device includes a drive motor (20) mounted on the base (10), and the output shaft of the drive motor (20) is connected to the rotating shaft (16).

5. A reinforced locking type air supply and exhaust device according to claim 4, wherein: A worm (21) is coaxially fixedly connected to the output shaft of the drive motor (20), and a worm wheel (22) is rotatably connected to the base (10). The worm wheel (22) meshes with the worm (21), and the worm wheel (22) is driven to the rotating shaft (16).

6. A reinforced locking type air supply and exhaust device according to claim 5, wherein: The worm gear (22) is connected to the rotating shaft (16) via a gear set (23) to adjust the transmission ratio.

7. The reinforced locking type air supply and exhaust device according to claim 3, wherein: The locking device includes a first buckle (30) directly or indirectly installed on the baffle (13) and a second buckle (31) slidably disposed on the base (10). The base (10) is provided with a control component for controlling the movement of the second buckle (31). When the baffle (13) is closed, the control component can drive the second buckle (31) to engage with the first buckle (30).

8. A reinforced locking type air supply and exhaust device according to claim 7, wherein: The control component includes a drive shaft rotatably connected to the base (10), the second buckle (31) is slidably disposed on the base (10) via a slide (32), a cam (33) is fixedly connected to the drive shaft, and a receiving groove (34) for accommodating the cam (33) is provided on the slide (32). When the baffle (13) is closed, the cam (33) rotates to push against the wall of the receiving groove (34) to drive the slide (32) to slide back and forth, thereby driving the second buckle (31) to move closer to or away from the corresponding first buckle (30).

9. A reinforced locking ventilation device according to claim 8, characterized in that: The drive shaft is the rotating shaft (16) connected to the drive device. A rotatable sleeve (40) is sleeved on the rotating shaft (16) corresponding to the position of the active connecting rod (14). The sleeve (40) is fixedly connected to the corresponding active connecting rod (14). A groove (42) with a circumferentially limited length is provided on the rotating shaft (16) corresponding to the position of the sleeve (40). A protrusion (41) extending into the groove (42) is fixedly connected on the sleeve (40). The groove (42) and the protrusion (41) cooperate to form a preset angle free stroke, so that the rotating shaft (16) can rotate relative to the active connecting rod (14) at a preset angle. This is used to drive the second buckle (31) to engage or disengage with the first buckle (30) by rotating the rotating shaft (16) when the baffle (13) closes the vent (11).

10. The reinforced locking type air supply and exhaust device according to claim 7, characterized in that: At least one of the first buckle (30) and the second buckle (31) is an elastic buckle.

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