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 cone pulley driving system comprises a driving mechanism and a cone pulley which is in driving connection with the driving mechanism and is used for the linkage piece to bypass, and the cone pulley is provided with a first abutting end and a second abutting end which is gradually expanded from the first abutting end and axially extends; when the conical wheel is driven by the driving mechanism to move axially so that the first abutting end can abut against the linkage piece, the linkage piece is used for applying tension moment smaller than gravity moment to the door body assembly under the action of the spring, and the door is automatically opened. When the conical wheel is driven by the driving mechanism to move axially so that the second abutting end can abut against the linkage piece, the linkage piece is used for applying tension moment larger than gravity moment to the door body assembly under the action of the spring, and the door is automatically closed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home appliances, in particular to an automatic door opening and closing mechanism and a door cabinet device. BACKGROUND

[0002] Door cabinet devices such as built-in dishwashers are now commonly used household appliances. In general, the automatic opening and closing of the door of a door cabinet device is achieved by a push rod mechanism on the top of the device pushing and pulling the door body. However, on the one hand, the existing push rod mechanism extends too long after the push rod pushes out the door body, affecting the appearance; on the other hand, the existing push rod mechanism is limited by the form of the push rod and can only achieve automatic opening and closing of the door within a small angle range, and the remaining angles still need to be completed manually by the user, while the user often needs to overcome a large door lock force when manually opening and closing the door, resulting in poor user experience. In addition, during the automatic closing of the door, the push rod in the existing push rod mechanism is usually hard-connected with the door lock to pull the door body to close the door, and if the user's hand is located between the door body and the cabinet at this time, the user's hand is easy to be pinched, which has a large safety hazard. SUMMARY

[0003] Therefore, it is necessary to solve the problems of the existing push rod mechanism that can only achieve automatic opening and closing of the door within a small angle range, poor user experience, and safety hazards, and the utility model provides an automatic door opening and closing mechanism and a door cabinet device, which can achieve automatic opening and closing of the door within a full angle, improve user experience, and improve safety performance.

[0004] In one embodiment of the present application, the utility model provides an automatic door opening and closing mechanism for being arranged between a cabinet frame and a door body assembly, comprising:

[0005] a hinge spring system, comprising a hinge assembly for rotatably mounting the door body assembly to the cabinet frame, a linkage connected with the hinge assembly, and a spring connected to the linkage and used for connecting with the cabinet frame; and

[0006] a bevel gear drive system, comprising a drive mechanism and a bevel gear in driving connection with the drive mechanism and bypassed by the linkage, the bevel gear having a first abutting end and a second abutting end axially extending from the first abutting end;

[0007] When the conical wheel is axially moved under the drive of the driving mechanism so that the first abutting end abuts against the linkage, the linkage is used to exert a pulling moment smaller than the gravitational moment of the door body assembly on the door body assembly under the action of the spring, thereby automatically opening the door; when the conical wheel is axially moved under the drive of the driving mechanism so that the second abutting end abuts against the linkage, the linkage is used to exert a pulling moment larger than the gravitational moment of the door body assembly on the door body assembly under the action of the spring, thereby automatically closing the door.

[0008] According to an embodiment of the present application, the conical wheel is a bevel gear; and the linkage is a tooth belt engaged with the bevel gear.

[0009] According to an embodiment of the present application, the hinge assembly comprises a hinge base fixedly connected with the cabinet frame, a hinge support fixedly connected with the door body assembly, and a rotating shaft rotatably connecting the hinge support with the hinge base; and two ends of the tooth belt are respectively limitedly connected with the hinge support and the spring.

[0010] According to an embodiment of the present application, the tooth belt has a tooth segment engaged with the bevel gear, a rigid segment extending from the tooth segment to the hinge support, and a flexible segment extending from the tooth segment to the spring; when the bevel gear is engaged with the tooth segment of the tooth belt, the bevel gear is rotated under the drive of the driving mechanism to pull or push the rigid segment of the tooth belt.

[0011] According to an embodiment of the present application, the conical wheel driving system further comprises a Hall sensor built in the bevel gear and a magnetic member arranged on the tooth belt; when the bevel gear is engaged with the tooth segment of the tooth belt, the Hall sensor senses the magnetic member.

[0012] According to an embodiment of the present application, the magnetic member is located on the flexible segment adjacent to the tooth segment.

[0013] According to an embodiment of the present application, the second abutting end is arranged adjacent to the driving mechanism relative to the first abutting end.

[0014] According to an embodiment of the present application, the hinge spring system further comprises a guide roller arranged on the cabinet frame, the guide roller being arranged adjacent to the axis of the spring, and the linkage sequentially passes through the guide roller and the conical wheel to extend to the hinge assembly.

[0015] According to one embodiment of the present application, the automatic door opening and closing mechanism further comprises a door lock assembly arranged between the door body assembly and the cabinet frame; the door lock assembly has a locking state and an unlocking state which can be automatically switched to each other, and sends a door closing completion signal when switching from the unlocking state to the locking state.

[0016] According to another aspect of the present application, one embodiment of the present application further provides a door cabinet device, comprising:

[0017] a cabinet frame;

[0018] a door body assembly; and

[0019] the automatic door opening and closing mechanism described above is arranged between the cabinet frame and the door body assembly.

[0020] In summary, when the door needs to be closed, the bevel gear drive system of the present application only needs to axially move the bevel gear to make the second pressing end with a larger radius in the bevel gear press against the connecting member, so that the pulling torque M2 exerted by the connecting member on the door body assembly under the action of the spring is greater than the gravitational torque M1 of the door body assembly, to break the torque balance state and realize automatic door closing; when the door needs to be opened, the bevel gear drive system of the present application only needs to axially move the bevel gear to make the first pressing end with a smaller radius in the bevel gear press against the connecting member, so that the pulling torque M2 exerted by the connecting member on the door body assembly under the action of the spring is smaller than the gravitational torque M1 of the door body assembly, to break the torque balance state and realize automatic door opening.

[0021] In addition, the bevel gear drive system of the present application can also actively pull or push the rigid section of the toothed belt by means of the meshing relationship between the bevel gear and the toothed belt, to greatly increase the pulling torque to resist the door lock resistance and assist in closing the door, or to push the hinge support to assist in opening the door, without the need for other auxiliary door opening systems, so as to realize full-angle automatic opening and closing of the door, improve the user experience, and improve the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1A A curve diagram showing the change of the pulling torque applied to the hinge tension spring system and the gravitational torque of the door body assembly with the door opening angle;

[0023] Figure 1B A curve diagram showing the ratio between the pulling torque applied to the hinge tension spring system and the gravitational torque of the door body assembly with the door opening angle;

[0024] Figure 2 A perspective view of the door cabinet device according to one embodiment of the present application;

[0025] Figure 3 Fig. 6 shows a schematic view of the automatic door opening and closing mechanism in the door box device according to the above embodiment of the present application;

[0026] Figure 4 Fig. 7 shows a schematic view of the automatic door opening and closing mechanism in the door box device according to the above embodiment of the present application in a closed door state;

[0027] Figure 5 Fig. 8 shows a schematic view of the automatic door opening and closing mechanism in the door box device according to the above embodiment of the present application in an open door state.

[0028] Main element symbol explanation: 1, automatic door opening and closing mechanism; 10, hinge spring system; 11, hinge assembly; 111, hinge base; 112, hinge support; 113, pivot shaft; 12, linkage; 120, toothed belt; 121, tooth segment; 122, rigid segment; 123, flexible segment; 13, spring; 14, guide roller; 20, bevel gear drive system; 21, drive mechanism; 22, bevel gear; 220, bevel gear; 221, first pressing end; 222, second pressing end; 23, magnetic element; 30, door lock assembly; 2, box frame; 3, door body assembly.

[0029] The above main element symbol explanation is further explained in detail in combination with the drawings and the specific embodiments. Specific embodiments

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, many specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, a feature defined with "first", "second" or "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0035] In some door box devices, the balance or difference between the torque generated by the hinge tension spring system and the gravity torque of the door body assembly is used to realize the hovering and non-hoovering of the door body assembly at a certain angle. This hinge tension spring system mainly consists of a tension spring, a pull rope and a hinge, the hinge is arranged between the box frame and the door body assembly, so that the door body assembly can pivot relative to the box frame to change the door angle, and the tension spring connects the hinge through the pull rope to exert torque on the hinge. With the change of the door angle, the gravity G of the door body assembly does not change, but the gravity force arm Lg will change, so that the gravity torque M1=G*Lg changes with the change of the door angle; at the same time, the tension of the pull rope will change with the change of the door angle, so that the tension F of the tension spring acting on the hinge through the pull rope and the force arm Lf of the pull rope will change, that is, the tension torque M2=F*Lf will also change with the change of the door angle.

[0036] In this way, by designing the parameters of the hinge tension spring system, M2≈M1 can usually be realized except for small angles, and the curve of the change of M2 with the opening angle is generally as follows: 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.

[0037] 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.

[0038] Specifically, see the attached document. Figure 2 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.

[0039] More specifically, such as Figures 2 to 5 As shown, the automatic door opening and closing mechanism 1 may include a hinge spring system 10 and a conical wheel 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 conical wheel drive system 20 includes a drive mechanism 21 and a conical wheel 22 drivenly connected to the drive mechanism 21 and bypassed by the linkage 12; the conical wheel 22 has a first pressing end 221 for pressing against the linkage 12 and a second pressing end 222 that extends axially from the first pressing end 221.

[0040] Thus, as Figure 5 As shown, when the conical wheel 22 moves axially under the drive of the drive mechanism 21, so that the first pressing end 221 presses against the linkage 12, the linkage 12, under the action of the spring 13, applies a pulling torque M2 to the door assembly 3 that is less than the gravitational torque M1 of the door assembly 3, thereby automatically opening the door; Figure 3 and Figure 4 As shown, when the conical wheel 22 moves axially under the drive of the drive mechanism 21, so that the second pressing end 222 presses against the linkage 12, the linkage 12 applies a pulling torque M2 greater than the gravitational torque M1 of the door assembly 3 under the action of the spring 13, and automatically closes the door.

[0041] It is worth noting that, since the radius of the first pressing end 221 of the conical wheel 22 is smaller than the radius of the second pressing end 222, when the second pressing end 222 of the conical wheel 22 presses against the linkage 12, the spring 13 is elongated, so that the spring pre-tightening force is increased; at this time, although the force arm of the linkage 12 exerting pulling force on the door body assembly 3 can be reduced, the present application can still ensure that the pulling force moment M2 exerted by the linkage 12 on the door body assembly 3 under the action of the spring 13 is increased, so as to be greater than the gravitational moment M1 of the door body assembly 3, thereby realizing automatic door closing of the door body assembly 3. Similarly, when the first pressing end 221 of the conical wheel 22 presses against the linkage 12, the spring 13 is shortened, so that the spring pre-tightening force is reduced; at this time, the pulling force moment M2 exerted by the linkage 12 on the door body assembly 3 under the action of the spring 13 is reduced, so as to be less than the gravitational moment M1 of the door body assembly 3, thereby realizing automatic door opening of the door body assembly 3.

[0042] It can be understood that, in an example of the present application, when a certain part of the conical wheel 22 between the first pressing end 221 and the second pressing end 222 presses against the linkage 12, the pulling force moment M2 exerted by the linkage 12 on the door body assembly 3 under the action of the spring 13 can be substantially equal to the gravitational moment M1 of the door body assembly 3, achieving moment balance, so that the door body assembly 3 is in a hovering state. Thereafter, as shown in Figure 4 when door closing is needed, the conical wheel driving system 20 only needs to drive the conical wheel 22 to move axially by the driving mechanism 21 to make the second pressing end 222 press against the linkage 12, so that the pulling force moment M2 exerted by the linkage 12 is increased to break the moment balance state and realize automatic door closing; as shown in Figure 5 when door opening is needed, the conical wheel driving system 20 also only needs to drive the conical wheel 22 to move axially by the driving mechanism 21 to make the first pressing end 221 press against the linkage 12, so that the pulling force moment M2 exerted by the linkage 12 is reduced to break the moment balance state and realize automatic door opening.

[0043] Exemplarily, as shown in Figures 3 to 5As shown, the second pressing end 222 of the conical wheel 22 is arranged adjacent to the drive mechanism 21 relative to the first pressing end 221. Thus, when the drive mechanism 21 drives the conical wheel 22 to extend axially, the second pressing end 222 of the conical wheel 22 presses against the linkage 12 to automatically close the door; when the drive mechanism 21 drives the conical wheel 22 to retract axially, the first pressing end 221 of the conical wheel 22 presses against the linkage 12 to automatically open the door.

[0044] Optionally, such as Figure 3 As shown, the conical wheel 22 is implemented as a bevel gear 220; correspondingly, the linkage 12 is implemented as a toothed belt 120 that meshes with the bevel gear 220 to prevent slippage between the two.

[0045] Optionally, such as Figures 2 to 5 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 two ends of the linkage 12 are 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.

[0046] Optionally, such as Figures 3 to 5 As shown, the toothed belt 120 has a toothed section 121 that meshes with the bevel gear 220, a rigid section 122 extending from the toothed section 121 to the hinge bracket 112, and a flexible section 123 extending from the toothed section 121 to the spring 13. When the bevel gear 220 meshes with the toothed section 121 of the toothed belt 120, the bevel gear 220 rotates under the drive of the drive mechanism 21 to pull or push the rigid section 122 of the toothed belt 120, so that the pulling torque applied by the toothed belt 120 to the door assembly 3 is further increased or decreased to assist in closing or opening the door.

[0047] It is worth noting that the rigidity of the rigid section 122 of the tooth belt 120 is much greater than the rigidity of the flexible section 123, so that while allowing the flexible section 123 to bend to bypass the bevel gear 220, the rigid section 122 has sufficient rigidity to exert a pushing force on the hinge bracket 112 to assist in opening the door in the initial stage of opening the door. In other words, in the initial stage of opening the door, the gravitational moment M1 of the door body assembly 3 itself is small enough to overcome the door lock resistance to automatically open the door; but the bevel gear drive system 20 of the present application can drive the bevel gear 220 to rotate forward by the driving mechanism 21 to drive the rigid section 122 of the tooth belt 120 to push the hinge bracket 112 to exert a pushing force moment on the door body assembly 3 in the same direction as the gravitational moment, thereby completing automatic opening of the door.

[0048] Similarly, in the final stage of closing the door, the door body assembly 3 needs to overcome the door seal resistance to complete closing the door; at this time, the bevel gear drive system 20 of the present application can drive the bevel gear 220 to rotate reversely by the driving mechanism 21 to drive the rigid section 122 of the tooth belt 120 to pull the hinge bracket 112 to exert a pulling force moment on the door body assembly 3 in the opposite direction of the gravitational moment, thereby completing automatic closing of the door. It can be understood that the present application can define the forward rotation of the driving mechanism 21 as the clockwise direction as shown in Figure 4 , and define the reverse rotation of the driving mechanism 21 as the counterclockwise direction as shown in Figure 4 .

[0049] In addition, the driving mechanism 21 mentioned in the present application can be but not limited to a driving motor with shaft extension function, which can drive the bevel gear 22 to move axially and also drive the bevel gear 22 to rotate forward or reversely as needed. Of course, in other examples of the present application, the driving mechanism 21 can also be implemented as a driving motor or other mechanism arranged on a moving platform, as long as it can drive the bevel gear 22 to move axially and also drive the bevel gear 22 to rotate, which will not be described herein.

[0050] According to the above embodiment of the present application, the spring 13 is implemented as a tension spring, and the two ends of the tension spring are respectively limitedly connected to the box frame 2 and the linkage 12. In this way, the linkage 12 exerts a pulling force moment on the door body assembly 3 under the pulling force of the tension spring. It can be understood that in other examples of the present application, the spring 13 can also be implemented as a compression spring, as long as it can provide elastic force to achieve torque balance, which will not be described herein.

[0051] Notably, during the opening and closing of the door, the hinge bracket 112 rotates with the door assembly 3 around the pivot 113, so that the connecting member 12 changes with the opening and closing of the door, causing the spring 13 to easily swing greatly with the opening and closing of the door, and a large enough installation space needs to be reserved. In order to solve this problem, as shown in Figures 2 to 5 the hinge spring system 10 of the present application can further include a guide roller 14 installed on the cabinet frame 2, which is arranged adjacent to the axis direction of the spring 13. The connecting member 12 passes the guide roller 14 and the bevel gear 22 in sequence from the spring 13 to extend to the hinge assembly 11, so that the pulling direction of the connecting member 12 on the spring 13 is fixed and always consistent with the axis direction of the spring 13, preventing the spring 13 from swinging.

[0052] In addition, in order to accurately determine whether the bevel gear 220 is engaged with the toothed segment 121 of the tooth belt 120, as shown in Figure 3 the bevel gear driving system 20 of the present application can further include a Hall sensor (not shown in the figure) built in the bevel gear 220 and a magnetic piece 23 arranged on the tooth belt 120, so that when the bevel gear 220 is engaged with the toothed segment 121 of the tooth belt 120, the Hall sensor can just sense the magnetic piece 23. It can be understood that the magnetic piece 23 can be but not limited to a magnet that can be sensed by the Hall sensor.

[0053] In this way, as shown in Figure 4 during the automatic closing of the door, when the door assembly 3 enters the final stage of closing, the bevel gear 220 is engaged with the toothed segment 121 of the tooth belt 120, indicating that the door assembly 3 is about to complete the closing; at this time, the Hall sensor just senses the magnetic piece 23 to output a closing signal to control the driving mechanism 21 to drive the bevel gear 220 to rotate counterclockwise, pulling the rigid segment 122 of the tooth belt 120 to pull the hinge bracket 112, and applying a large closing force to the door assembly 3 to complete the closing. It can be understood that when the door assembly 3 completes the closing, the Hall sensor cannot sense the magnetic piece 23 to output a closing completion signal to control the driving mechanism 21 to stop rotating.

[0054] Similarly, as shown in Figure 4As shown, during the automatic door opening process, when the door assembly 3 is in the initial opening stage, the drive mechanism 21 receives the door opening signal, drives the bevel gear 220 to rotate clockwise, pushes the rigid section 122 of the toothed belt 120 to push the hinge bracket 112, and applies a large opening force to the door assembly 3 to achieve door opening; then, after the door assembly 3 opens to a certain angle, the Hall sensor senses that the magnetic component 23 has moved away and outputs a door opening signal, controlling the drive mechanism 21 to stop rotating, and subsequently the door assembly 3 achieves automatic door opening under its own gravity.

[0055] 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 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 releaseably lock the door assembly 3 to the housing frame 2.

[0056] In this way, when the door needs to be opened, the door opening signal will trigger the door lock assembly 30 to automatically switch from the locked state to the unlocked state to issue an unlocking signal; at this time, the drive mechanism 21 in the conical wheel drive system 20 is triggered, and the conical wheel 22 is retracted so that the first pressing end 221 presses against the linkage 12, so that the tension torque M2 on the door body assembly 3 is reduced; at the same time, the conical wheel 22 is rotated counterclockwise to apply a larger opening force to the door body assembly 3, overcome the resistance of the door lock assembly 30, and thus realize automatic door opening.

[0057] According to the above embodiments of this application, 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 assembly. 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 assembly 3 respectively, to cooperate in realizing 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 assembly 3 respectively, so that automatic door opening and closing can also be realized through the cooperation of the two, which will not be described in detail in this application.

[0058] It is worth noting that when the door assembly 3 is closed, the door lock assembly 30 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 cone wheel drive system 20 can control the drive mechanism 21 to stop rotating based on the locking signal so that the door assembly 3 remains in the closed state.

[0059] In addition, the driving mechanism 21 in the cone wheel driving system 20 of the present application can control the axial extension and / or forward and reverse rotation by a control board (not shown in the figure), and the driving mechanism 21 can be internally provided with a Hall sensor (not shown in the figure) to detect the rotating speed of the output shaft, and further to perceive the size change of the motor load, so as to perform safety precautions.

[0060] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0061] The above embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. An automatic door opening and closing mechanism, used to be installed between the box frame and the door assembly, characterized in that, Comprise: a hinge spring system, comprising a hinge assembly for rotatably mounting the door body assembly to the cabinet frame, a link connected to the hinge assembly, and a spring connected to the link and used for connecting to the cabinet frame; and a bevel gear drive system, comprising a drive mechanism and a bevel gear in driving connection with the drive mechanism and bypassed by the link, the bevel gear having a first abutting end and a second abutting end axially extending from the first abutting end; when the bevel gear is axially moved under the drive of the drive mechanism to abut the first abutting end against the link, the link is used for exerting a pulling moment smaller than the gravity moment of the door body assembly on the door body assembly under the action of the spring to automatically open the door; when the bevel gear is axially moved under the drive of the drive mechanism to abut the second abutting end against the link, the link is used for exerting a pulling moment larger than the gravity moment of the door body assembly on the door body assembly under the action of the spring to automatically close the door.

2. The automatic door opening mechanism of claim 1, wherein, The bevel gear is a bevel gear; the link is a toothed belt engaged with the bevel gear.

3. The automatic door opening mechanism of claim 2, wherein, The hinge assembly comprises a hinge base for fixed connection to the cabinet frame, a hinge support for fixed connection to the door body assembly, and a rotating shaft rotatably connecting the hinge support to the hinge base; two ends of the toothed belt are respectively limitedly connected to the hinge support and the spring.

4. The automatic door opening mechanism of claim 3, wherein, The toothed belt has a tooth segment engaged with the bevel gear, a rigid segment extending from the tooth segment to the hinge support, and a flexible segment extending from the tooth segment to the spring; when the bevel gear is engaged with the tooth segment of the toothed belt, the bevel gear is rotated under the drive of the drive mechanism to pull or push the rigid segment of the toothed belt.

5. The automatic door opening mechanism of claim 4, wherein, The bevel gear drive system further comprises a Hall sensor built in the bevel gear and a magnetic member arranged on the toothed belt; when the bevel gear is engaged with the tooth segment of the toothed belt, the Hall sensor senses the magnetic member.

6. The automatic door opening mechanism of claim 5, wherein, The magnetic member is located on the flexible segment adjacent to the tooth segment.

7. The automatic door operator of claim 1, wherein, The second abutting end is arranged adjacent to the drive mechanism relative to the first abutting end.

8. The automatic door opening mechanism according to any one of claims 1 to 6, wherein, The hinge spring system further comprises a guide roller arranged on the cabinet frame, the guide roller being arranged adjacent to the axis of the spring, the link bypassing the guide roller and the bevel gear in sequence from the spring to extend to the hinge assembly.

9. The automatic door opening mechanism according to any one of claims 1 to 6, wherein, Further comprising a door lock assembly arranged between the door body assembly and the cabinet frame; the door lock assembly has a locking state and an unlocking state which can be automatically switched to each other, and sends a door closing completion signal when switching from the unlocking state to the locking state.

10. A door box apparatus, characterized by Comprise: a cabinet frame; a door body assembly; and the automatic opening and closing door mechanism as claimed in any one of claims 1 to 9, arranged between the cabinet frame and the door body assembly.

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