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. The automatic door opening and closing mechanism comprises a hinge spring system which comprises a hinge assembly, a linkage piece connected with the hinge assembly and a spring connected to the linkage piece; the tensioning driving system comprises a driving mechanism, a transmission arm and a tensioning wheel, the transmission arm is in driving connection with the driving mechanism, the tensioning wheel is arranged on the transmission arm and used for tensioning the linkage piece, and the transmission arm is driven by the driving mechanism to drive the tensioning wheel to move among a first position, a second position and a third position; when the tensioning wheel is located at the second position, the linkage piece applies a tension moment balanced with the gravity moment to the door body assembly under the action of the spring; when the tensioning wheel is located at the first position, the linkage piece applies tension moment smaller than gravity moment to the door body assembly so as to break moment balance. When the tensioning wheel is located at the third position, the linkage piece applies the tension moment larger than the gravity moment to the door body assembly 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 problem that existing push rod mechanisms can only achieve automatic door opening and closing within a small angle range and have a poor user experience. 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, thereby improving the user experience.

[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] A hinge spring system includes a hinge assembly for rotatably mounting the door assembly to the housing frame, a linkage connected to the hinge assembly, and a spring connected to the linkage and for connection to the housing frame; and

[0006] The tensioning drive system includes a drive mechanism, a transmission arm driven by the drive mechanism, and a tensioning wheel disposed on the transmission arm for tensioning the linkage. The transmission arm drives the tensioning wheel to move between a first position, a second position, and a third position under the drive of the drive mechanism, thereby adjusting the magnitude of the tension torque applied by the linkage to the door assembly under the action of the spring.

[0007] When the tension wheel is in the second position, the linkage applies a tensile torque to the door assembly under the action of the spring, which is balanced by the gravitational torque of the door assembly; when the tension wheel is in the first position, the linkage applies a tensile torque to the door assembly under the action of the spring, which is less than the gravitational torque, to break the torque balance; when the tension wheel is in the third position, the linkage applies a tensile torque to the door assembly under the action of the spring, which is greater than the gravitational torque, to break the torque balance.

[0008] According to one embodiment of this application, the hinge assembly includes a hinge base for fixed connection with the box frame, a hinge bracket for fixed connection with the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the linkage is a pull rope with its two ends respectively limited and connected to the hinge bracket and the spring.

[0009] According to one embodiment of this application, the tensioning wheel further has a fourth position. When the tensioning wheel moves from the third position to the fourth position, the tension torque applied to the door assembly by the linkage under the action of the spring is further increased. The first position, the second position, the third position, and the fourth position are arranged sequentially along the rotation direction of the transmission arm.

[0010] According to one embodiment of this application, the tensioning drive system further includes a plurality of position detection switches and a mating component for triggering the position detection switches. The plurality of position detection switches are respectively disposed at the first position, the second position, the third position, and the fourth position. The mating component is disposed on the transmission arm at a position corresponding to the tensioning wheel.

[0011] According to one embodiment of this application, the hinge spring system further includes a guide roller for mounting on the housing frame, the guide roller being arranged adjacent to the axis of the spring, and the pull rope extending from the spring, passing successively over the guide roller and the tension wheel, to the hinge bracket.

[0012] According to one embodiment of this application, the hinge spring system further includes a fixed roller for mounting on the housing frame, the fixed roller being arranged adjacent to the tension drive system, and the pull rope extending from the spring past the guide roller, the fixed roller, and the tension roller to the hinge bracket.

[0013] According to one embodiment of this application, the drive mechanism includes a drive motor, a drive gear fixedly connected to the output shaft of the drive motor, and a driven gear meshing with the drive gear; one end of the transmission arm is fixedly connected to the driven gear, and the other end of the transmission arm is equipped with the tensioning wheel.

[0014] According to one embodiment of this application, the tensioning wheel is a wheel body arranged on the transmission arm away from the driven gear and used for contacting the linkage on one side, or two wheels arranged at intervals on the transmission arm away from the driven gear and used for contacting the linkage on both sides.

[0015] According to one embodiment of this application, the driving mechanism is a drive motor, and the output shaft of the drive motor is fixedly connected to one end of the transmission arm; the tensioning wheel is two wheel bodies arranged at opposite ends of the transmission arm and used to contact the linkage on one side.

[0016] According to one embodiment of this application, the driving mechanism is a drive motor, and the output shaft of the drive motor is fixedly connected to the middle of the transmission arm; the tensioning wheel includes two wheel bodies arranged at opposite ends of the transmission arm and used for contacting the linkage on both sides.

[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 tensioning drive system of this application only needs to drive the transmission arm through the drive mechanism to move the tensioning wheel from the second position to the third position to tension the linkage, so that the tension torque M2 exerted by the linkage on the door assembly under the action of the spring is greater than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state and realizing automatic closing; when the door needs to be opened, the tensioning drive system of this application also only needs to drive the transmission arm through the drive mechanism to move the tensioning wheel from the second position to the first position to relax the linkage, so that the tension torque M2 exerted by the linkage on the door assembly under the action of the spring is less than the gravitational torque M1 of the door assembly, thereby breaking the torque balance state and realizing automatic opening.

[0022] Furthermore, the tensioning drive system of this application can also drive the transmission arm through the drive mechanism to move the tensioning wheel from the third position to the fourth position to further tension the linkage, so that the tension torque M2 applied by the linkage to the door assembly under the action of the spring is further increased, so as to overcome the door lock resistance and / or door seal resistance to complete the door closing and locking, realize the automatic opening and closing of the door at all angles, and improve the user experience. 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 An enlarged schematic diagram 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 An enlarged schematic diagram of the automatic door opening and closing mechanism according to the above embodiments of this application is shown from another perspective;

[0028] Figure 5 A schematic diagram showing the door box device in a hovering state according to the above embodiments of this application is illustrated.

[0029] Figure 6 A schematic diagram showing the door box device according to the above embodiment of this application in the initial closing stage is shown;

[0030] Figure 7 A schematic diagram showing the door box device according to the above embodiment of this application in the final closed state is shown;

[0031] Figure 8 A schematic diagram showing the state of the door box device according to the above embodiments of this application after the door is closed is shown;

[0032] Figure 9 A schematic diagram showing the door box device according to the above embodiment of this application in the initial stage of opening is shown;

[0033] Figure 10 A schematic diagram showing the door box device according to the above embodiment of this application in the final stage of opening is shown;

[0034] Figure 11 A first variation example of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0035] Figure 12 A second variation example of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0036] Figure 13A third variation of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown;

[0037] Figure 14 A fourth variation of the automatic door opening and closing mechanism in the door box device according to the above embodiments of this application is shown.

[0038] Key component symbols: 1. Automatic door opening and closing mechanism; 10. Hinge spring system; 11. Hinge assembly; 111. Hinge base; 112. Hinge bracket; 113. Rotating shaft; 12. Linking element; 120. Pull rope; 13. Spring; 14. Guide roller; 15. Fixed roller; 20. Tensioning drive system; 201. First position; 202. Second position; 203. Third position; 204. Fourth position; 21. Drive mechanism; 211. Drive motor; 212. Drive gear; 213. Driven gear; 22. Transmission arm; 23. Tensioning wheel; 230. Wheel body; 24. Position detection switch; 25. Mating part; 250. Sliding contact; 26. Slide rail; 30. Door lock assembly; 40. Micro switch; 2. Box frame; 3. Door assembly.

[0039] 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

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 1BAs 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.

[0047] 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 the user experience.

[0048] Specifically, see the attached document. Figures 2 to 10 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.

[0049] More specifically, such as Figures 2 to 10 As shown, the automatic door opening and closing mechanism 1 may include a hinge spring system 10 and a tension drive system 20. The hinge spring system 10 includes a hinge assembly 11 for rotatably mounting the door assembly 3 to the housing frame 2, a linkage 12 connected to the hinge assembly 11, and a spring 13 connected to the linkage 12 and for connecting to the housing frame 2. The tension drive system 20 includes a drive mechanism 21, a transmission arm 22 drivenly connected to the drive mechanism 21, and a tension wheel 23 disposed on the transmission arm 22 for tensioning the linkage 12; the transmission arm 22, driven by the drive mechanism 21, drives the tension wheel 23 to move between a first position 201, a second position 202, and a third position 203, for adjusting the magnitude of the tension torque applied by the linkage 12 to the door assembly 3 under the action of the spring 13.

[0050] In particular, such as Figure 5 and Figure 8 As shown, when the tensioning wheel 23 is in the second position 202, the linkage 12, under the action of the spring 13, applies a tensile torque to the door assembly 3 that balances the gravitational torque of the door assembly 3; as Figure 9 and Figure 10 As shown, when the tension wheel 23 is in the first position 201, the linkage 12, under the action of the spring 13, applies a pulling torque less than the gravitational torque to the door assembly 3 to break the torque balance and automatically open the door; as Figure 6 As shown, when the tension wheel 23 is in the third position 203, the linkage 12 applies a pulling torque greater than the gravitational torque to the door assembly 3 under the action of the spring 13, so as to break the torque balance and automatically close the door.

[0051] It is worth noting that when the tensioning wheel 23 is in the second position 202 to tension the linkage 12 to a certain extent, the tension torque M2 exerted by the linkage 12 on the door assembly 3 under the action of the spring 13 can be basically equal to the gravitational torque M1 of the door assembly 3, achieving torque balance and causing the door assembly 3 to be in a suspended state. Subsequently, as... Figure 4 As shown, when the door needs to be closed, the tensioning drive system 20 only needs to drive the transmission arm 22 through the drive mechanism 21 to move the tensioning wheel 23 from the second position 202 to the third position 203, so as to further tension the linkage 12, thereby increasing the tension torque M2 exerted by the linkage 12 on the door assembly 3 under the action of the spring 13, so as to break the torque balance state and realize automatic door closing; as Figure 5 As shown, when the door needs to be opened, the tension drive system 20 only needs to drive the transmission arm 22 through the drive mechanism 21 to move the tension wheel 23 from the second position 202 to the first position 201, so as to relax or release the linkage 12, so that the tension torque M2 applied by the linkage 12 to the door assembly 3 under the action of the spring 13 becomes smaller, thereby breaking the torque balance state and realizing automatic door opening.

[0052] Optionally, such as Figures 2 to 4 As shown, the hinge assembly 11 includes a hinge base 111 for fixed connection with the box frame 2, a hinge bracket 112 for fixed connection with the door assembly 3, and a pivot 113 rotatably connecting the hinge bracket 112 to the hinge base 111. The linkage 12 can be implemented as a pull rope 120 with its two ends respectively limited and connected to the hinge bracket 112 and the spring 13. It is understood that the limiting connection mentioned in this application may include, but is not limited to, fixed connection, sleeve connection, hook connection, etc., as long as the spring 13 can apply a tensile torque to the door assembly 3 through the linkage 12. This application will not elaborate further on this.

[0053] Optionally, the spring 13 is implemented as a tension spring, with its two ends respectively limited and connected to the housing frame 2 and the linkage 12. Thus, the linkage 12 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 13 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.

[0054] It is worth noting that during the opening and closing of the door, the hinge bracket 112 rotates around the pivot 113 along with the door assembly 3, causing the pull cord 120 to change with the opening and closing of the door. This results in the spring 13 easily swinging significantly with the opening and closing of the door, requiring a sufficiently large installation space. To solve this problem, such as... Figures 2 to 10 As shown, the hinge spring system 10 of this application may further include a guide roller 14 for mounting on the housing frame 2. The guide roller 14 is arranged adjacent to the axial direction of the spring 13. The pull rope 120 extends from the spring 13, passing successively around the guide roller 14 and the tension wheel 23 to the hinge bracket 112, so that the direction of the tension force applied by the pull rope 120 to the spring 13 remains fixed and is always consistent with the axial direction of the spring 13, preventing the spring 13 from swaying.

[0055] Furthermore, in the final stage of closing, the door assembly 3 needs to overcome door lock resistance and / or door seal resistance to complete the closing and locking process; therefore, if Figure 2 and Figure 7 As shown, the tensioning wheel 23 in the tensioning drive system 20 of this application may also have a fourth position 204. When the tensioning wheel 23 moves from the third position 203 to the fourth position 204, the tension torque applied by the linkage 12 to the door assembly 3 under the action of the spring 13 is further increased, so as to overcome the door lock resistance and / or door seal resistance and complete the door closing and locking.

[0056] In other words, such as Figure 7 As shown, when the tension wheel 23 is in the fourth position 204, the tension wheel 23 applies a greater tension force to the linkage 12, causing the spring 13 to be further stretched to increase the spring preload, ensuring that the linkage 12 applies a greater tension force to the hinge bracket 112, thereby applying a greater tension torque to the door assembly 3 at the end of the closing process to overcome the door lock resistance and / or door seal resistance.

[0057] It is understood that the movement mode of the transmission arm 22 in this application is not limited to rotational / curved movement, but can also be linear movement, as long as it can drive the tension wheel 23 to move sequentially to the first position 201, the second position 202, the third position 203 and the fourth position 204. This application will not elaborate further on this.

[0058] Optionally, such as Figure 2As shown, the first position 201, the second position 202, the third position 203, and the fourth position 204 are arranged sequentially along the rotation direction of the transmission arm 22. As the tension wheel 23 moves sequentially to the first position 201, the second position 202, the third position 203, and the fourth position 204, the tension applied to the linkage 12 gradually increases, so as to increase the extension length of the spring 13 and increase the tension applied by the linkage 12 to the hinge bracket 112. As a result, the tension torque applied by the linkage 12 to the door assembly 3 under the action of the spring 13 increases sequentially.

[0059] For example, such as Figures 2 to 10 As shown, the drive mechanism 21 may include a drive motor 211 mounted on the housing frame 2, a drive gear 212 fixedly connected to the output shaft of the drive motor 211, and a driven gear 213 meshing with the drive gear 212; one end of the transmission arm 22 is fixedly connected to the driven gear 213, and the other end of the transmission arm 22 is equipped with the tension wheel 23. Thus, the drive gear 212, under the action of the drive motor 211, drives the driven gear 213 to rotate, which in turn drives the tension wheel 23 to rotate via the transmission arm 22, allowing the tension wheel 23 to move as needed between the first position 201, the second position 202, the third position 203, and the fourth position 204, thereby achieving automatic door opening and closing.

[0060] Optionally, such as Figure 3 and Figure 4 As shown, the radius of the driving gear 212 is smaller than the radius of the driven gear 213, so as to reduce the driving force required by the drive motor 211, reduce the requirements of the drive motor 211, thereby reducing costs and improving feasibility.

[0061] Optionally, such as Figures 2 to 10 As shown, the first position 201, the second position 202, the third position 203, and the fourth position 204 are arranged at intervals in a clockwise direction on the housing frame 2, and are located on the side of the driven gear 213 away from the hinge assembly 11. Thus, when the drive motor 211 drives the driving gear 212 to rotate counterclockwise, the driven gear 213 drives the transmission arm 22 to rotate clockwise, so that the tensioning wheel 23 moves sequentially to the first position 201, the second position 202, the third position 203, and the fourth position 204.

[0062] Optionally, such as Figures 3 to 10As shown, the tensioning wheel 23 is implemented as a wheel body 230 arranged on the transmission arm 22 away from the driven gear 213 and for contacting the linkage 12 on one side, so that the linkage 12 can pass over the underside of the wheel body 230 to extend to the hinge bracket 112. Thus, when the wheel 230 moves clockwise sequentially to the first position 201, the second position 202, the third position 203, and the fourth position 204 under the drive of the transmission arm 22, the wheel 230 can not only gradually tension the linkage 12 to increase the extension length of the spring 13, so that the tension applied by the linkage 12 to the hinge bracket 112 gradually increases, but also adjust the direction of the linkage 12, so that the lever arm of the tension applied by the linkage 12 to the hinge bracket 112 also gradually increases, thereby ensuring that the tension torque applied by the linkage 12 to the door assembly 3 can change rapidly, which helps to realize rapid opening and closing of the door.

[0063] It is worth noting that, such as Figures 2 to 10 As shown, the hinge spring system 10 further includes a fixed roller 15 for mounting on the housing frame 2. The fixed roller 15 is arranged adjacent to the tension drive system 20. The pull rope 120 extends from the spring 13, passing successively over the guide roller 14, the fixed roller 15, and the tension wheel 23 to the hinge bracket 112, such that the tension wheel 23 does not contact the linkage 12 when it is in the first position 201, so as to minimize the stretching length of the spring 13 and ensure that the tension torque exerted by the linkage 12 on the door assembly 3 under the action of the spring 13 is less than the gravitational torque of the door assembly 3, so as to break the torque balance. It is understood that in other examples of this application, the hinge spring system 10 may also exclude the fixed roller 15, so that when the tensioning wheel 23 is in the first position 201, it can contact the linkage 12 to tension the linkage 12. As long as it is ensured that the tension torque exerted by the linkage 12 on the door assembly 3 under the action of the spring 13 is less than the gravitational torque of the door assembly 3, so as to break the torque balance, this application will not elaborate further.

[0064] In addition, to ensure that the tensioning wheel 23 can move accurately to the required position as needed, such as Figure 3 and Figure 4As shown, the tensioning drive system 20 of this application may further include a plurality of position detection switches 24 and a mating member 25 for triggering the position detection switches 24; the plurality of position detection switches 24 are respectively disposed at the first position 201, the second position 202, the third position 203 and the fourth position 204, and the mating member 25 is disposed on the transmission arm 22 at a position corresponding to the tensioning wheel 23, so as to trigger the corresponding position detection switch 24 when the tensioning wheel 23 moves to a certain position, thereby controlling the drive motor 211 to stop working and ensuring that the tensioning wheel 23 stays at the corresponding position.

[0065] Optionally, such as Figure 4 As shown, the mating part 25 is implemented as a sliding contact 250 protruding from the transmission arm 22, and the sliding contact 250 is arranged away from the tension wheel 23 so as to trigger the position detection switch 24 to send a control signal to control the drive motor 211.

[0066] Optionally, such as Figure 2 and Figure 4 As shown, the tensioning drive system 20 also includes a slide 26 formed in the housing frame 2 and matched with the sliding contact 250; the slide 26 extends curvedly around the driven gear 213 to pass through the first position 201, the second position 202, the third position 203 and the fourth position 204 in sequence, so that the sliding contact 250 can slide along the slide 26 to pass through the first position 201, the second position 202, the third position 203 and the fourth position 204 in sequence to trigger the corresponding position detection switch 24.

[0067] It is worth noting that, although in the above embodiments of this application, the first position 201, the second position 202, the third position 203, and the fourth position 204 are arranged at intervals along a clockwise direction in the box frame 2, in the first modified example of this application, such as Figure 11As shown, the first position 201, the second position 202, the third position 203 and the fourth position 204 can also be arranged at intervals in the counterclockwise direction on the housing frame 2. It is only necessary to arrange the first position 201, the second position 202, the third position 203 and the fourth position 204 on the driven gear 213 on the side away from the hinge assembly 11. Thus, when the wheel 230 moves counterclockwise sequentially to the first position 201, the second position 202, the third position 203, and the fourth position 204 under the drive of the transmission arm 22, the wheel 230 can not only gradually tension the linkage 12 to increase the extension length of the spring 13, making the tension applied by the linkage 12 to the hinge bracket 112 gradually increase, but also adjust the direction of the linkage 12, so that the lever arm of the tension applied by the linkage 12 to the hinge bracket 112 also gradually increases, thereby ensuring that the tension torque applied by the linkage 12 to the door assembly 3 can change rapidly, which helps to realize rapid opening and closing of the door.

[0068] Furthermore, in the first modified example of this application, such as Figure 11 As shown, the hinge spring system 10 may not include the fixed roller 15, so as to ensure that the tensioning wheel 23 can always tension the linkage 12 while preventing the linkage 12 from disengaging from the tensioning wheel 23, thereby improving the overall stability of the automatic door opening and closing mechanism 1.

[0069] It is worth mentioning that, attached Figure 12 A second variation of the automatic door opening and closing mechanism according to the above embodiments of this application is shown. Compared to the embodiments according to this application, the automatic door opening and closing mechanism 1 of the second variation of this application differs in that: Figure 12 As shown, the tensioning wheel 23 in the tensioning drive system 20 is implemented as two wheel bodies 230 spaced apart on the transmission arm 22 away from the driven gear 213 and used to contact the linkage 12 on both sides, so that the linkage 12 can pass between the two wheel bodies 230 to connect the hinge bracket 112, thereby increasing the adjustment range of the tensioning wheel 23 in two directions (i.e., clockwise and counterclockwise), preventing the linkage 12 from disengaging from the tensioning wheel 23, and improving the overall stability of the automatic door opening and closing mechanism 1.

[0070] Appendix Figure 13 A third variation of the automatic door opening and closing mechanism according to the above embodiments of this application is shown. Compared to the first variation according to this application, the automatic door opening and closing mechanism 1 of the third variation differs in that: Figure 13As shown, the drive mechanism 21 in the tension drive system 20 is implemented as a drive motor 211 mounted on the housing frame 2, and the output shaft of the drive motor 211 is fixedly connected to one end of the transmission arm 22; the tension wheel 23 is implemented as two wheel bodies 230 arranged at opposite ends of the transmission arm 22 and used to contact the linkage 12 on one side, so that the linkage 12 can pass through the underside of the two wheel bodies 230 to connect the hinge bracket 112.

[0071] Thus, as Figure 13 As shown, one wheel 230 of the tensioning wheel 23 adjacent to the drive motor 211 can replace the fixed roller 15, so that the other wheel 230 away from the drive motor 211 does not contact the linkage 12 when it is in the first position 201, which helps to minimize the tension torque exerted by the linkage 12 on the door assembly 3; at the same time, when the other wheel 230 of the tensioning wheel 23 away from the drive motor 211 moves counterclockwise to the first position 201 and the second position 201 under the drive of the transmission arm 22, In positions 202, 203, and 204, the wheel 230 can not only gradually tension the linkage 12 to increase the extension length of the spring 13, thus gradually increasing the tension applied by the linkage 12 to the hinge bracket 112, but also adjust the direction of the linkage 12, so that the lever arm of the tension applied by the linkage 12 to the hinge bracket 112 also gradually increases. This ensures that the torque applied by the linkage 12 to the door assembly 3 can change rapidly, which helps to achieve rapid opening and closing of the door.

[0072] Optionally, such as Figure 13 As shown, the wheel 230 on the transmission arm 22 adjacent to the drive motor 211 is arranged coaxially with the output shaft of the drive motor 211, so that the position of the wheel 230 on the tensioning wheel 23 adjacent to the drive motor 211 will not rotate with the rotation of the transmission arm 22, so as to ensure that the linkage 12 located between the tensioning drive system 20 and the guide roller 14 does not wobble.

[0073] Appendix Figure 14 A fourth variation of the automatic door opening and closing mechanism according to the above embodiments of this application is shown. Compared to the third variation according to this application, the automatic door opening and closing mechanism 1 of the fourth variation differs in that: Figure 14As shown, the output shaft of the drive motor 211 in the tension drive system 20 is fixedly connected to the middle of the transmission arm 22; the tension wheel 23 is implemented as two wheel bodies 230 arranged at opposite ends of the transmission arm 22 and used to contact the linkage 12 on both sides, so that the linkage 12 can pass between the two wheel bodies 230 to connect the hinge bracket 112. Thus, when one wheel body 230 of the tension wheel 23 is in the fourth position 204 to tension the linkage 12 downward, the other wheel body 230 of the tension wheel 23 also contacts the linkage 12 to tension the linkage 12 upward, so that the tension wheel 23 can tension the linkage 12 in both directions, so as to change the extension length of the spring 13 more quickly, thereby applying a greater tensile torque to the door assembly 3, and thus more easily overcoming the door lock resistance and / or door seal resistance to achieve closing. It is understandable that when one of the tensioning wheels 23 is in the first position 201 to disengage from the linkage 12, the other wheel 23 in the tensioning wheel 23 also disengages from the linkage 12 in order to remove the tensioning effect on the linkage 12, thereby minimizing the tensile torque applied to the door assembly 3 and realizing automatic door opening.

[0074] According to the above embodiments of this application, as Figures 2 to 10 As shown, the automatic door opening and closing mechanism 1 may further include a door lock assembly 30 disposed between the door assembly 3 and the housing frame 2. The door lock assembly 30 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 30 to automatically switch from the locked state to the unlocked state to issue an unlocking signal; the drive mechanism 21 in the tension drive system 20 is triggered to drive the transmission arm 22 to move the tension wheel 23 to the first position 201, thereby reducing the tension torque M2 on the door assembly 3. It is understood that since the locking force of the door lock assembly 30 in the unlocked state is less than the locking force of the door lock assembly 30 in the locked state, the reduction in the tension torque M2 easily breaks the torque balance, thereby achieving automatic door opening.

[0075] It is worth noting that the number of automatic door opening and closing mechanisms 1 in each door box device can be one or two, to automatically open or close a single door component. For example, in one example of this application, two automatic door opening and closing mechanisms 1 can be located on the left and right sides of the door component 3 respectively, to cooperate in achieving automatic door opening and closing; or, in another example of this application, an automatic door opening and closing mechanism 1 and a hinge spring system can be arranged on the left and right sides of the door component 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.

[0076] Furthermore, the drive motor 211 in the tension drive system 20 of this application can be controlled to rotate forward and backward by a control board (not shown in the figure), and the drive motor 211 can be equipped with a Hall sensor (not shown in the figure) to sense changes in the motor load in order to implement safety precautions. For example, in order to prevent safety issues such as increased motor load caused by pinching the hand when closing the door, when the Hall sensor of this application senses that the motor load has increased and the speed has slowed down when the door is about to be closed, it can first control the drive motor 211 to stop for a predetermined time to allow the user time to release the handle, and then control the drive motor 211 to drive the transmission arm 22 to rotate, thereby moving the tension wheel 23 from the third position 203 to the fourth position 204 to overcome the resistance torque until the door lock signal is triggered to complete the closing, thereby safely achieving automatic closing at all angles.

[0077] Specifically, during the automatic opening and closing process, for safety and intermediate operation considerations, such as... Figure 5 , Figure 6 as well as Figure 10 As shown, the automatic door opening and closing mechanism 1 of this application can be set with at least one hovering position or an open position. A micro switch 40 senses the hovering or open position of the hinge bracket 112, thereby controlling the drive motor 211 to drive the transmission arm 22 to rotate, causing the tension wheel 23 to move from the first position 201 or the third position 203 to the second position 202. This allows the hinge bracket 112 to hover at a preset hovering or open position, thus achieving the hovering of the door assembly 3. Optionally, the micro switch 40 of this application is installed on the housing frame 2.

[0078] 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.

[0079] 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: A hinge spring system includes a hinge assembly for rotatably mounting the door assembly to the housing frame, a linkage connected to the hinge assembly, and a spring connected to the linkage and for connection to the housing frame. and The tensioning drive system includes a drive mechanism, a transmission arm driven by the drive mechanism, and a tensioning wheel disposed on the transmission arm for tensioning the linkage. The transmission arm drives the tensioning wheel to move between a first position, a second position, and a third position under the drive of the drive mechanism, thereby adjusting the magnitude of the tension torque applied by the linkage to the door assembly under the action of the spring. When the tensioning wheel is in the second position, the linkage applies a pulling torque to the door assembly under the action of the spring, which is balanced by the gravitational torque of the door assembly. When the tension wheel is in the first position, the linkage applies a pulling torque less than the gravitational torque to the door assembly under the action of the spring, so as to break the torque balance; When the tensioning wheel is in the third position, the linkage applies a pulling torque greater than the gravitational torque to the door assembly under the action of the spring, thereby breaking the torque balance.

2. The automatic door opening and closing mechanism according to claim 1, characterized in that, The hinge assembly includes a hinge base for fixed connection with the box frame, a hinge bracket for fixed connection with the door assembly, and a pivot for rotatably connecting the hinge bracket to the hinge base; the linkage is a pull rope with its two ends respectively limited and connected to the hinge bracket and the spring.

3. The automatic door opening and closing mechanism according to claim 2, characterized in that, The tensioning wheel also has a fourth position. When the tensioning wheel moves from the third position to the fourth position, the tension torque applied to the door assembly by the linkage under the action of the spring is further increased. The first position, the second position, the third position and the fourth position are arranged sequentially along the rotation direction of the transmission arm.

4. The automatic door opening and closing mechanism according to claim 3, characterized in that, The tensioning drive system further includes a plurality of position detection switches and a mating component for triggering the position detection switches. The plurality of position detection switches are respectively disposed at the first position, the second position, the third position and the fourth position. The mating component is disposed on the transmission arm at a position corresponding to the tensioning wheel.

5. The automatic door opening and closing mechanism according to claim 2, characterized in that, The hinge spring system further includes a guide roller for mounting on the housing frame, the guide roller being arranged adjacent to the axis of the spring, and the pull cord extending from the spring, passing successively over the guide roller and the tension wheel, to the hinge bracket.

6. The automatic door opening and closing mechanism according to claim 5, characterized in that, The hinge spring system further includes a fixed roller for mounting on the housing frame, the fixed roller being arranged adjacent to the tension drive system, and the pull rope extending from the spring, passing successively around the guide roller, the fixed roller, and the tension roller, to the hinge bracket.

7. The automatic door opening and closing mechanism according to any one of claims 1 to 6, characterized in that, The drive mechanism includes a drive motor, a drive gear fixedly connected to the output shaft of the drive motor, and a driven gear meshing with the drive gear; one end of the transmission arm is fixedly connected to the driven gear, and the other end of the transmission arm is equipped with the tensioning wheel.

8. The automatic door opening and closing mechanism according to claim 7, characterized in that, The tensioning wheel is either a single wheel arranged on the transmission arm away from the driven gear and used for contacting the linkage on one side, or two wheels arranged at intervals on the transmission arm away from the driven gear and used for contacting the linkage on both sides.

9. The automatic door opening and closing mechanism according to any one of claims 1 to 5, characterized in that, The driving mechanism is a drive motor, and the output shaft of the drive motor is fixedly connected to one end of the transmission arm; the tensioning wheel is two wheel bodies arranged at opposite ends of the transmission arm and used to contact the linkage on one side.

10. The automatic door opening and closing mechanism according to claim 6, characterized in that, The driving mechanism is a drive motor, and the output shaft of the drive motor is fixedly connected to the middle of the transmission arm; the tensioning wheel includes two wheel bodies arranged at opposite ends of the transmission arm and used to contact the linkage on both sides.

11. 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 10, wherein the automatic door opening and closing mechanism is disposed between the housing frame and the door assembly.

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