Automatic door opening and closing mechanism and door box equipment

Abstract

The utility model relates to an automatic door opening and closing mechanism and door box equipment, which can realize full-angle automatic door opening and closing and improve user experience. The automatic door opening and closing mechanism comprises a hinge assembly and a door closing assembly, wherein the hinge assembly comprises a hinge base used for being fixedly connected with a box body frame, a hinge support used for being fixedly connected with a door body assembly and a rotating shaft enabling the hinge support to be rotatably connected to the hinge base; the pull rope spring assembly comprises a pull rope connected with the hinge support and a spring used for being connected with the box body frame, and the spring is connected to the pull rope and used for applying tension moment balanced with gravity moment of the door body assembly to the door body assembly; the connecting rod driving assembly comprises a linear driving mechanism and a connecting rod in driving connection with the linear driving mechanism, and the connecting rod is connected to the hinge support in a limiting mode and used for pushing and pulling the hinge support under driving of the linear driving mechanism so as to break moment balance.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to an automatic door opening and closing mechanism and door box device. Background Technology

[0002] Door-mounted appliances such as built-in dishwashers are common household appliances. Typically, these appliances automatically open and close their doors using a push-rod mechanism on top of the appliance. However, existing push-rod mechanisms have several drawbacks. First, the push-rod extends too far after pushing the door open, affecting aesthetics. Second, the existing mechanism is limited to a small angle range for automatic opening and closing; the remaining angles still require manual operation, which often involves overcoming significant lock force, resulting in a poor user experience. Furthermore, during automatic closing, the push-rod mechanism in existing systems is usually rigidly connected to the lock to pull the door shut. If the user's hand is positioned between the door and the appliance at this point, it could easily pinch their hand, posing a significant safety hazard. Utility Model Content

[0003] Therefore, it is necessary to address the problems of existing push rod mechanisms that can only achieve automatic door opening and closing within a small angle range, resulting in poor user experience and safety hazards. This utility model provides an automatic door opening and closing mechanism and door box device that can achieve automatic door opening and closing at all angles, improving user experience and enhancing safety performance.

[0004] In one embodiment of this application, the present invention provides an automatic door opening and closing mechanism for being disposed between a housing frame and a door assembly, comprising:

[0005] The hinge assembly includes a hinge base for fixed connection to the housing frame, a hinge bracket for fixed connection to the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base.

[0006] A pull cord spring assembly includes a pull cord connected to the hinge bracket and a spring for connecting to the housing frame, the spring being connected to the pull cord for applying a pulling torque to the door assembly that balances the gravitational torque of the door assembly; and

[0007] A linkage drive assembly includes a linear drive mechanism and a linkage drivenly connected to the linear drive mechanism. The linkage is limitedly connected to the hinge bracket and is used to push and pull the hinge bracket under the drive of the linear drive mechanism to break the torque balance.

[0008] According to one embodiment of this application, the linear drive mechanism includes: a screw motor for mounting on the housing frame; a moving component including a mating part driven by the screw motor and a hydraulic part fixedly connected to the mating part; and a push rod having a piston end movably disposed on the hydraulic part and a connecting end extending from the piston end of the hydraulic part; one end of the connecting rod is limitedly connected to the connecting end of the push rod, and the other end of the connecting rod is limitedly connected to the hinge bracket; when the moving component drives the push rod to extend or retract under the drive of the screw motor, the connecting rod is used to push and pull the hinge bracket relative to the housing frame.

[0009] According to one embodiment of this application, the screw motor includes a housing for fixing to the housing frame, a motor body mounted on the housing, and a screw fixedly connected to the output shaft of the motor body; the moving member is slidably disposed on the housing, and the mating part of the moving member is threadedly connected to the screw.

[0010] According to one embodiment of this application, one end of the connecting rod is rotatably connected to the connecting end of the push rod; the other end of the connecting rod is rotatably connected to the hinge bracket.

[0011] According to one embodiment of this application, the hydraulic part of the moving component is a hydraulic chamber storing hydraulic oil; the piston end of the push rod is slidably mounted inside the hydraulic chamber, and the connecting end of the push rod slidably seals the opening of the hydraulic chamber.

[0012] According to one embodiment of this application, the push rod further has an adhesive layer covering the connecting end.

[0013] According to one embodiment of this application, the extension direction of the push rod is the same as the radial direction of the rotating shaft.

[0014] According to one embodiment of this application, the centerline of the push rod coincides with the angle bisector of the rotation angle of the hinge bracket.

[0015] According to one embodiment of this application, the linkage drive assembly further includes a flipping member located on the bisector of the rotation angle of the hinge bracket. The flipping member includes a flipping shaft rotatably disposed on the hinge base and a pair of flipping wings extending radially from the flipping shaft. The two flipping wings are inclined relative to each other to form a V-shaped structure.

[0016] According to one embodiment of this application, the flipping component further includes a torsion spring fitted onto the flipping shaft to limit the flipping wing to remain in the flipped state; the included angle between the two flipping wings is an obtuse angle.

[0017] According to another aspect of this application, one embodiment of this application further provides a door box device, including:

[0018] Box frame;

[0019] Door components; and

[0020] The automatic door opening and closing mechanism described above is disposed between the housing frame and the door assembly.

[0021] In summary, when the door needs to be closed, the automatic door opening and closing mechanism of this application only needs to pull the hinge bracket first through the linkage of the linkage drive assembly, and then push the hinge bracket to apply a larger torque required for closing the door assembly, thereby breaking the torque balance provided by the pull rope spring assembly to achieve automatic closing; when the door needs to be opened, the automatic door opening and closing mechanism of this application also only needs to pull the hinge bracket first through the linkage of the linkage drive assembly, and then push the hinge bracket to apply a larger torque required for opening the door assembly, thereby breaking the torque balance provided by the pull rope spring assembly to achieve automatic closing.

[0022] Furthermore, during the opening and closing process, if the user forcibly opens or closes the door, although the linkage will drive the push rod to extend or retract under the rotation of the hinge bracket, the linkage drive assembly of this application combines the linkage with hydraulics. Therefore, during the forced extension and retraction of the push rod, the hydraulics can play a buffering role, preventing damage to the screw motor and improving the overall safety performance of the automatic door opening and closing mechanism. Attached Figure Description

[0023] Figure 1A A schematic diagram showing the curves of the tension torque applied to the hinge spring system and the gravitational torque of the door assembly as a function of the door opening angle;

[0024] Figure 1B A schematic diagram showing the ratio of the tension torque applied to the hinge spring system to the gravitational torque of the door assembly as a function of the door opening angle;

[0025] Figure 2 This is a perspective view of a door box device according to an embodiment of this application;

[0026] Figure 3 A schematic diagram of the structure of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0027] Figure 4 A schematic diagram of the linkage drive assembly in the automatic door opening and closing mechanism according to the above embodiments of this application is shown;

[0028] Figure 5An exploded view of the screw motor, moving part, and push rod in the linkage drive assembly according to the above embodiments of this application is shown.

[0029] Figure 6 A cross-sectional schematic diagram of the screw motor, moving part, and push rod in the linkage drive assembly according to the above embodiments of this application is shown;

[0030] Figure 7 A schematic diagram showing the hinge bracket in the closed position in the door box device according to the above embodiments of this application is shown.

[0031] Figure 8 A schematic diagram showing the state in which the hinge bracket is in the dead position in the door box device according to the above embodiment of this application is shown;

[0032] Figure 9 A schematic diagram showing the hinge bracket in the open position in the door box device according to the above embodiment of this application is shown.

[0033] Explanation of main component symbols: 1. Automatic door opening and closing mechanism; 10. Hinge assembly; 11. Hinge base; 12. Hinge bracket; 13. Rotating shaft; 20. Pull rope spring assembly; 21. Pull rope; 22. Spring; 23. Roller assembly; 231. Adjusting roller; 232. Fixed roller; 30. Linkage drive assembly; 300. Linear drive mechanism; 31. Screw motor; 311. Housing; 312. Motor body; 313. Screw; 32. Moving part; 321. Mating part; 322. Hydraulic part; 3220. Hydraulic chamber; 33. Push rod; 331. Piston end; 332. Connecting end; 333. Rubber coating layer; 34. Linkage rod; 35. Flipping part; 351. Flipping shaft; 352. Flipping wing; 353. Torsion spring; 40. Door lock assembly; 2. Box frame; 3. Door assembly.

[0034] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this utility model. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] In some door frame devices, the suspension and non-suspended position of the door assembly are achieved by balancing or differentiating the torque generated by a hinge spring system with the door's weight torque. This hinge spring system mainly consists of a spring, a cord, and a hinge. The hinge is positioned between the frame and the door assembly, allowing the door assembly to pivot relative to the frame to change the door angle. The spring connects to the hinge via the cord to apply torque to the hinge. As the door angle changes, the weight G of the door assembly remains constant, but the lever arm Lg changes, causing the gravitational torque M1 = G * Lg to change with the door angle. Simultaneously, the tension in the cord changes with the door angle, causing the tension F exerted by the spring on the hinge through the cord and the lever arm Lf of the cord to both change. Therefore, the tension torque M2 = F * Lf also changes with the door angle.

[0041] Thus, by designing the hinge spring system parameters, it is generally possible to achieve M2≈M1 except for small angles, with its curve roughly varying with the door opening angle as shown in the figure. Figure 1A and 1B As shown: In areas outside the small angle, the existing hinge spring system can already achieve M2≈M1. The small difference can be compensated by friction to achieve torque balance hovering outside the small angle; while torque balance hovering within the small angle can be achieved by the action of door seal and door lock.

[0042] However, while this hinge spring system can allow the door to hover at all angles, it cannot automatically open or close the door. Therefore, the applicant has designed an automatic door opening and closing mechanism and door housing device that can achieve automatic opening and closing at all angles, improving user experience and enhancing safety performance.

[0043] Specifically, see the attached document. Figures 2 to 9 As shown, one embodiment of this application provides a door cabinet device, which may include a cabinet frame 2 with an opening, a door assembly 3 for covering the opening of the cabinet frame 2, and an automatic door opening and closing mechanism 1 disposed between the cabinet frame 2 and the door assembly 3, so as to realize automatic door opening and closing at all angles. It is understood that the door cabinet device of this application may be implemented as a sink dishwasher or refrigerator, etc.; in addition, the door cabinet device of this application may also include, but is not limited to, a functional body capable of realizing functions such as washing dishes or refrigeration, which will not be elaborated here.

[0044] More specifically, such as Figures 2 to 9As shown, the automatic door opening and closing mechanism 1 may include a hinge assembly 10, a pull cord spring assembly 20, and a linkage drive assembly 30. The hinge assembly 10 includes a hinge base 11 for fixed connection to the housing frame 2, a hinge bracket 12 for fixed connection to the door assembly 3, and a pivot 13 rotatably connecting the hinge bracket 12 to the hinge base 11. The pull cord spring assembly 20 includes a pull cord 21 connected to the hinge bracket 12 and a spring 22 connected to the housing frame 2. The spring 22 is connected to the pull cord 21 and applies a pulling torque to the door assembly 3 that balances the gravitational torque of the door assembly 3. The linkage drive assembly 30 includes a linear drive mechanism 300 and a linkage 34 driven by the linear drive mechanism 300. The linkage 34 is limitedly connected to the hinge bracket 12 and is used to push and pull the hinge bracket 12 under the drive of the linear drive mechanism 300 to break the torque balance and achieve automatic door opening and closing.

[0045] In particular, such as Figures 3 to 6 As shown, the linear drive mechanism 300 may include a screw motor 31, a moving part 32, and a push rod 33 for mounting on the housing frame 2; the moving part 32 includes a mating part 321 driven by the screw motor 31 and a hydraulic part 322 fixedly connected to the mating part 321; the push rod 33 has a piston end 331 movably disposed on the hydraulic part 322 and a connecting end 332 extending out of the hydraulic part 322 from the piston end 331; one end of the connecting rod 34 is limited to the connecting end 332 of the push rod 33, and the other end of the connecting rod 34 is limited to the hinge bracket 12; when the moving part 32 drives the push rod 33 to extend or retract under the drive of the screw motor 31, the connecting rod 34 is used to push and pull the hinge bracket 12 relative to the housing frame 2, so as to apply a torque that breaks the torque balance to the door assembly 3, thereby realizing automatic opening and closing of the door at all angles. It is understood that in other examples of this application, the linear drive mechanism 300 may also be implemented as an electric actuator or a ball screw or other mechanism capable of providing linear drive force, which will not be described in detail here.

[0046] It is worth noting that, such as Figure 8 As shown, when the screw motor 31 stops driving, the pulling torque M2 exerted by the pull rope 21 on the door assembly 3 under the action of the spring 22 is basically equal to the gravitational torque M1 of the door assembly 3, achieving a torque balance state, so that the door assembly 3 can be suspended relative to the box frame 2. Thus, when it is necessary to close the door, according to... Figure 9 , Figure 8 as well as Figure 7In this sequence, the linkage drive assembly 30 only needs to drive the moving part 32 through the screw motor 31 to extend and retract the push rod 33, so that the linkage 34 correspondingly pushes and pulls the hinge bracket 12 to apply a torque opposite to the direction of gravity torque to the door assembly 3, thereby breaking the torque balance provided by the pull rope spring assembly 20 to achieve automatic closing; when it is necessary to open the door, according to... Figure 7 , Figure 8 as well as Figure 9 In this sequence, the linkage drive assembly 30 only needs to drive the moving part 32 through the screw motor 31 to extend and retract the push rod 33, so that the connecting rod 34 correspondingly pushes and pulls the hinge bracket 12 to apply a torque to the door assembly 3 in the same direction as the gravitational torque, thereby breaking the torque balance provided by the pull rope spring assembly 20 to achieve automatic door opening. It can be understood that the linkage drive assembly 30 of this application can apply a large pushing or pulling force to the hinge bracket 12 through the connecting rod 34, which can not only overcome the door lock and door seal resistance at the end of closing to achieve automatic closing at all angles, but also overcome the door lock force at the beginning of opening to achieve automatic opening at all angles.

[0047] Furthermore, during the automatic door opening and closing process, if the user forcibly opens or closes the door (i.e., the door assembly 3 will drive the hinge bracket 12 to rotate forcibly), although the linkage 34 will drive the push rod 33 to extend or retract forcibly under the rotation of the hinge bracket 12, since the linkage drive assembly 30 of this application combines the linkage with hydraulics, that is, the push rod 33 and the screw motor 31 are transmitted through the moving part 32 with hydraulic part 322, the hydraulic part 322 of the moving part 32 can play a good buffering role during the forced extension and retraction of the push rod 33, and will not damage the screw motor 31, which helps to improve the overall safety performance of the automatic door opening and closing mechanism 1.

[0048] For example, such as Figures 4 to 6As shown, the screw motor 31 may include a housing 311 for fixing to the housing frame 2, a motor body 312 installed within the housing 311, and a screw 313 fixedly connected to the output shaft of the motor body 312. The moving member 32 is slidably disposed on the housing 311, and the mating part 321 of the moving member 32 is threadedly connected to the screw 313. Thus, when the motor body 312 drives the screw 313 to rotate forward or reverse, the moving member 32, under the constraint of the housing 311, converts the rotational motion into linear motion, thereby driving the push rod 33 to extend or retract, and then pushes or pulls the hinge bracket 12 through the connecting rod 34 to break the torque balance, thereby realizing automatic door opening and closing. It can be understood that the forward rotation mentioned in this application may refer to the rotation direction of the output shaft of the motor body 312 when the push rod 33 extends; correspondingly, the reverse rotation mentioned in this application may refer to the rotation direction of the output shaft of the motor body 312 when the push rod 33 retracts.

[0049] Optionally, such as Figure 4 As shown, one end of the connecting rod 34 is rotatably connected to the connecting end 332 of the push rod 33, and the other end of the connecting rod 34 is rotatably connected to the hinge bracket 12 to prevent jamming and ensure that the connecting rod 34 pushes and pulls the hinge bracket 12 when the push rod 33 extends or retracts. It is understood that in other examples of this application, both ends of the connecting rod 34 can also be limited and connected to the connecting end 332 and the hinge bracket 12 by means such as hinges or hooks, as long as jamming can be prevented, and this application will not elaborate on this.

[0050] Optionally, such as Figure 5 and Figure 6 As shown, the hydraulic part 322 of the moving part 32 is implemented as a hydraulic chamber 3220 storing hydraulic oil; the piston end 331 of the push rod 33 is slidably installed within the hydraulic chamber 3220, and the connecting end 332 of the push rod 33 slidably seals the opening of the hydraulic chamber 3220. Thus, when the user forcibly opens or closes the door, the connecting rod 34, driven by the hinge bracket 12, will apply a large pulling or pushing force to the connecting end 332 of the push rod 33. At this time, the hydraulic oil in the hydraulic chamber 3220 can flow from one side of the piston end 331 of the push rod 33 to the other side, thereby using hydraulic pressure to provide a better buffering effect, preventing the push rod 33 from forcibly moving the moving part 32 and avoiding damage to the screw motor 31.

[0051] Optionally, such as Figure 6 As shown, the push rod 33 further has an adhesive layer 333 covering the connecting end 332, so that after engaging with the hydraulic cavity 3220, it can slidably seal the opening of the hydraulic cavity 3220 to prevent hydraulic oil leakage.

[0052] Optionally, such as Figures 7 to 9As shown, the extension direction of the push rod 33 is the same as the radial direction of the rotating shaft 13, so that the push rod 33 extends and retracts toward the rotating shaft 13, thereby driving the connecting rod 34 to push and pull the hinge bracket 12 to rotate.

[0053] Preferably, such as Figure 8 As shown, the centerline of the push rod 33 coincides with the angle bisector OC of the rotation angle of the hinge bracket 12, so that the mounting angle of the linkage drive assembly 30 matches the rotation angle of the hinge bracket 12 and the pivot 13, so as to better drive the linkage 34 to push and pull the hinge bracket 12 to rotate. It can be understood that, as Figures 7 to 9 As shown, in the angle bisector OC mentioned in this application: O is the center of the pivot 13, and C is the midpoint of line segment AB; where A is the position of the connection point between the hinge bracket 12 and the connecting rod 34 in the open state, and B is the position of the connection point between the hinge bracket 12 and the connecting rod 34 in the closed state.

[0054] It is worth noting that, such as Figures 7 to 9 As shown, during a complete opening or closing process, the screw motor 31 in the linkage drive assembly 30 of this application needs to rotate forward once and reverse once to drive the push rod 33 to complete one extension and retraction, so that the linkage 34 applies a push-pull motion to the hinge bracket 12. However, when the hinge bracket 12 moves to the angle bisector OC under the drive of the linkage 34, the center line of the linkage 34 coincides with the center line of the push rod 33, pointing towards the pivot 13, which will form a push-pull dead point; therefore, in order to ensure that the linkage 34 switches between push and pull at this point, as... Figures 3 to 9 As shown, the linkage drive assembly 30 of this application may further include a flipping member 35 located on the bisector of the rotation angle of the hinge bracket 12; the flipping member 35 includes a flipping shaft 351 rotatably disposed on the hinge base 11 and a pair of flipping wings 352 extending radially from the flipping shaft 351, the two flipping wings 352 being inclined to each other to form a V-shaped structure.

[0055] Thus, as Figure 8 As shown, when the push rod 33 retracts to pull the hinge bracket 12 to rotate to the angle bisector via the connecting rod 34, the hinge bracket 12 will encounter a flip wing 352, causing the flip wing 35 to flip. At this time, another flip wing 352 will strike the hinge bracket 12, causing the hinge bracket 12 to cross the dead point position, that is, cross the angle bisector. Then, the push rod 33 extends to push the hinge bracket 12 to continue rotating via the connecting rod 34, continuing the original opening or closing action. After that, the push rod 33 continues to extend until the opening or closing action is completed.

[0056] Optionally, such as Figure 4As shown, the included angle between the two flip wings 352 is an obtuse angle, so that it is easier to flip under the impact of the hinge bracket 12 and avoid jamming.

[0057] Optionally, such as Figure 4 As shown, the flipping component 35 further includes a torsion spring 353 fitted onto the flipping shaft 351 to restrict the flipping wing 352 to remain in the flipped state; that is, under the action of the torsion spring 353, the flipping wing 352 in the flipping component 35 that is far from the hinge bracket 12 is raised, and the flipping wing 352 in the flipping component 35 that is close to the hinge bracket 12 is flush with the hinge base 11, so as to ensure that the hinge bracket 12 passes over the closer flipping wing 352 and collides with the farther flipping wing 352, so that when the flipping component 35 flips, the closer flipping wing 352 is raised to hit the hinge bracket 12, ensuring that the hinge bracket 12 rotates past the dead point.

[0058] It is worth noting that the spring 22 in this application can be, but is not limited to, a tension spring, with its two ends respectively limited and connected to the housing frame 2 and the pull rope 21. Thus, the pull rope 21 applies a tensile torque to the door assembly 3 under the tension of the tension spring. It is understood that in other examples of this application, the spring 22 can also be implemented as a compression spring, as long as it can provide elastic force to achieve torque balance; this application will not elaborate further on this.

[0059] Furthermore, during the opening and closing of the door, the hinge bracket 12 rotates around the pivot 13 along with the door assembly 3, causing the pull cord 21 to change with the opening and closing of the door. This results in the spring 22 easily swinging excessively with the opening and closing of the door, requiring a sufficiently large installation space. To solve this problem, such as... Figure 2 As shown, the pull rope spring assembly 20 of this application may further include a roller assembly 23, which is installed on the housing frame 2 and arranged between the spring 22 and the hinge bracket 12. The pull rope 21 passes around the roller assembly 23 to change the direction of the pull rope, so that the direction of the tension applied by the pull rope 21 to the spring 22 is always consistent with the axial direction of the spring 22, preventing the spring 22 from tilting.

[0060] Optionally, such as Figure 2As shown, the roller assembly 23 may include an adjusting roller 231 arranged along the axis adjacent to the spring 22 and a fixed roller 232 arranged along the hinge bracket 12. The pull rope 21 extends from the spring 22, passing successively over the adjusting roller 231 and the fixed roller 232 to the hinge bracket 12. In this way, the pull rope 21 first passes over the adjusting roller 231 arranged along the axis adjacent to the spring 22 and then turns, passing over the fixed roller 232 arranged along the hinge bracket 12 to connect to the hinge bracket 12. This not only ensures that the spring 22 is only subjected to a force in the same direction as the axis of the spring 22, preventing the spring 22 from tilting, but also increases the tension arm of the pull rope 21, which helps to reduce the elastic force requirement of the spring 22.

[0061] According to the above embodiments of this application, as Figure 2 As shown, the automatic door opening and closing mechanism 1 may further include a door lock assembly 40 disposed between the door assembly 3 and the housing frame 2. The door lock assembly 40 has a lock state and an unlock state that can be automatically switched between each other, so as to releasably lock the door assembly 3 to the housing frame 2. Thus, when the door needs to be opened, an opening signal triggers the door lock assembly 40 to automatically switch from the locked state to the unlocked state to issue an unlock signal. At this time, the screw motor 31 in the linkage drive assembly 30 is triggered to drive the push rod 33 to extend or retract via the moving part 32, which in turn drives the linkage 34 to push or pull the hinge bracket 12, disrupting the torque balance and thus achieving automatic door opening. Similarly, when the door needs to be closed, a closing signal triggers the screw motor 31 to drive the push rod 33 to extend or retract via the moving part 32, which in turn drives the linkage 34 to push or pull the hinge bracket 12, disrupting the torque balance and thus achieving automatic door closing.

[0062] It is worth noting that when the door assembly 3 is closed, the door lock assembly 40 is triggered to switch from the unlocked state to the locked state and issue a locking signal to securely lock the door assembly 3. At this time, the linkage drive assembly 30 can control the screw motor 31 to stop rotating based on the locking signal so that the door assembly 3 remains in the closed state.

[0063] According to the above embodiments of this application, the pull rope spring assembly 20 and the linkage drive assembly 30 in each automatic door opening and closing mechanism 1 can be located on opposite sides of the housing frame 2, or on the same side of the housing frame 2; in other words, the hinge assembly 10 in each automatic door opening and closing mechanism 1 is usually a pair, located on opposite sides of the door assembly 3; the pull rope 21 of the pull rope spring assembly 20 and the linkage 34 of the linkage drive assembly 30 can be connected to different hinge brackets 12, or to the same hinge bracket 12.

[0064] Furthermore, each door housing device can contain one or two automatic door opening / closing mechanisms 1 to automatically open or close a single door assembly. For example, in one example of this application, two automatic door opening / closing mechanisms 1 can be located on the left and right sides of the door assembly 3 respectively, to cooperate in achieving automatic door opening and closing; or, in another example of this application, an automatic door opening / closing mechanism 1 and a hinge spring system can be arranged on the left and right sides of the door assembly 3 respectively, so that automatic door opening and closing can also be achieved through the cooperation of the two, which will not be elaborated further in this application.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An automatic door opening and closing mechanism, used to be installed between the box frame and the door assembly, characterized in that, include: The hinge assembly includes a hinge base for fixed connection to the housing frame, a hinge bracket for fixed connection to the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base. A pull cord spring assembly includes a pull cord connected to the hinge bracket and a spring for connecting to the housing frame, the spring being connected to the pull cord for applying a pulling torque to the door assembly that balances the gravitational torque of the door assembly. as well as A linkage drive assembly includes a linear drive mechanism and a linkage drivenly connected to the linear drive mechanism. The linkage is limitedly connected to the hinge bracket and is used to push and pull the hinge bracket under the drive of the linear drive mechanism to break the torque balance.

2. The automatic door opening and closing mechanism according to claim 1, characterized in that, The linear drive mechanism includes: a screw motor for mounting on the housing frame; a moving part including a mating part driven by the screw motor and a hydraulic part fixedly connected to the mating part; and a push rod having a piston end movably disposed on the hydraulic part and a connecting end extending from the piston end of the hydraulic part; one end of the connecting rod is limited to the connecting end of the push rod, and the other end of the connecting rod is limited to the hinge bracket; when the moving part drives the push rod to extend or retract under the drive of the screw motor, the connecting rod is used to push and pull the hinge bracket relative to the housing frame.

3. The automatic door opening and closing mechanism according to claim 2, characterized in that, The screw motor includes a housing for fixing to the housing frame, a motor body installed on the housing, and a screw fixedly connected to the output shaft of the motor body; the moving part is slidably disposed on the housing, and the mating part of the moving part is threadedly connected to the screw.

4. The automatic door opening and closing mechanism according to claim 2, characterized in that, One end of the connecting rod is rotatably connected to the connecting end of the push rod; the other end of the connecting rod is rotatably connected to the hinge bracket.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that, The hydraulic part of the moving part is a hydraulic chamber storing hydraulic oil; the piston end of the push rod is slidably mounted inside the hydraulic chamber, and the connecting end of the push rod slidably seals the opening of the hydraulic chamber; the push rod further has an adhesive layer covering the connecting end.

6. The automatic door opening and closing mechanism according to any one of claims 2 to 5, characterized in that, The extension direction of the push rod is the same as the radial direction of the rotating shaft.

7. The automatic door opening and closing mechanism according to claim 6, characterized in that, The centerline of the push rod coincides with the angle bisector of the rotation angle of the hinge bracket.

8. The automatic door opening and closing mechanism according to claim 7, characterized in that, The linkage drive assembly further includes a flipping member located on the bisector of the rotation angle of the hinge bracket. The flipping member includes a flipping shaft rotatably disposed on the hinge base and a pair of flipping wings extending radially from the flipping shaft. The two flipping wings are inclined relative to each other to form a V-shaped structure.

9. The automatic door opening and closing mechanism according to claim 8, characterized in that, The flipping component further includes a torsion spring fitted onto the flipping shaft to restrict the flipping wing from remaining in the flipped state; the included angle between the two flipping wings is an obtuse angle.

10. A door-mounted equipment, characterized in that, include: Box frame; Door components; as well as The automatic door opening and closing mechanism as described in any one of claims 1 to 9, wherein the automatic door opening and closing mechanism is disposed between the housing frame and the door assembly.

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