Door body assembly and refrigeration equipment

Abstract

The present invention discloses a door body assembly and a refrigeration device. The door body assembly is connected to a box body. The door body assembly includes a door body, a left transmission device, an intermediate transmission member, and a right transmission device. The left transmission device and the right transmission device transmit motion through the intermediate transmission member. The door body assembly has a left-opening state and a right-opening state. In the left-opening state, the left driving mechanism drives the first limiting portion to separate from the box body, and the right driving mechanism drives the second limiting portion to connect to the box body. In the right-opening state, the left driving mechanism drives the first limiting portion to connect to the box body, and the right driving mechanism drives the second limiting portion to separate from the box body. This solution can conveniently open the door on the left or the right at any time. When opening the door on the left, the right side will not fall off, and when opening the door on the right, the left side will not fall off. Through the coordinated movement among the left transmission device, the intermediate transmission member, and the right transmission device, the free opening and closing of both sides of the door body are realized.

Description

Technical Field

[0001] The present invention relates to a door body assembly, and more particularly to a refrigeration device having the door body assembly. Background Art

[0002] In order to meet the more personalized needs of users when using a refrigerator, some refrigerators now need to be customized for left-opening or right-opening according to the needs of customers. However, when users use the refrigerator, there may be a scenario where they sometimes need to open the door on the left side and sometimes on the right side. Most of the existing left-and-right opening design solutions are achieved by replacing hinges, and cannot meet the needs of users to change the opening direction at any time. Summary of the Invention

[0003] To solve the problems in the prior art, an object of the present invention is to provide a door body assembly that can be interchanged between left and right openings at any time and a refrigeration device having the door body assembly.

[0004] To achieve the above object of the invention, an embodiment of the present invention provides a door body assembly, which is connected to a box body. The door body assembly includes:

[0005] A door body;

[0006] A left transmission device, including a left driving mechanism disposed on the left side of the door body, a left transmission rod driven to rotate by the left driving mechanism, a first worm part connected to the left transmission rod, a first gear part meshing with the first worm part, and a first limiting part meshing with the first gear part;

[0007] A right transmission device, including a right driving mechanism disposed on the right side of the door body, a right transmission rod driven to rotate by the right driving mechanism, a second worm part connected to the right transmission rod, a second gear part meshing with the second worm part, and a second limiting part meshing with the second gear part;

[0008] An intermediate transmission member for enabling the left transmission device or the right transmission device to drive the other transmission device to move through the intermediate transmission member;

[0009] The door body assembly has a left-opening state and a right-opening state. In the left-opening state, the left driving mechanism drives the first limiting part to be separated from the box body, and the right driving mechanism drives the second limiting part to be connected to the box body; in the right-opening state, the left driving mechanism drives the first limiting part to be connected to the box body, and the right driving mechanism drives the second limiting part to be separated from the box body.

[0010] As a further improvement of the present invention, it further includes a left handle and a right handle. Both the left handle and the right handle are reciprocally slidably connected to the door body parallel to the door opening direction. The left driving mechanism, the right driving mechanism, the left handle, and the right handle are symmetrically arranged on the left and right sides of the door body. The left handle is used to drive the left driving mechanism, and the right handle is used to drive the right driving mechanism.

[0011] As a further improvement of the present invention, the left driving mechanism includes a left gear and a left rack that mesh with each other. The right driving mechanism includes a right gear and a right rack that mesh with each other. The left rack is connected to the left handle, and the right rack is connected to the right handle. The left transmission rod is fixedly connected to the left gear, and the right transmission rod is fixedly connected to the right gear. The intermediate transmission member has teeth and can mesh with the left gear and / or the right gear.

[0012] As a further improvement of the present invention, the left driving mechanism further includes a left elastic member, and the right driving mechanism further includes a right elastic member. The left elastic member is used to drive the left handle to move away from the door opening direction, and the right elastic member is used to drive the right handle to move away from the door opening direction.

[0013] As a further improvement of the present invention, the first worm part includes an upper left worm and a lower left worm. The first gear part includes an upper left gear set that meshes with the upper left worm and a lower left gear set that meshes with the lower left worm. The first limiting part includes an upper left limiting member that meshes with the upper left gear set and a lower left limiting member that meshes with the lower left gear set;

[0014] The second worm part includes an upper right worm and a lower right worm. The second gear part includes an upper right gear set that meshes with the upper right worm and a lower right gear set that meshes with the lower right worm. The second limiting part includes an upper right limiting member that meshes with the upper right gear set and a lower right limiting member that meshes with the lower right gear set.

[0015] As a further improvement of the present invention, the upper right worm is set as a right-handed structure, the lower right worm is set as a left-handed structure, the upper left worm is set as a left-handed structure, and the lower left worm is set as a right-handed structure.

[0016] As a further improvement of the present invention, the upper left limiting member, the lower left limiting member, the upper right limiting member, and the lower right limiting member all include a limiting rod and a tooth condition connected to the limiting rod. The box body includes a limiting hole aligned with the limiting rod.

[0017] As a further improvement of the present invention, the upper left gear set, the lower left gear set, the upper right gear set, and the lower right gear set each include a worm gear meshing with a worm, and a gear member coaxially connected to the worm gear, and the gear member meshes with the tooth condition.

[0018] To achieve one of the above-mentioned invention purposes, an embodiment of the present invention provides a refrigeration device, including the above-mentioned door body assembly.

[0019] As a further improvement of the present invention, it includes a box body, the box body includes an upper left hinge plate, a lower left hinge plate, an upper right hinge plate and a lower right hinge plate, the upper left hinge plate, the lower left hinge plate, the upper right hinge plate and the lower right hinge plate all have limit holes, and the limit holes of the upper left hinge plate and the lower left hinge plate are coaxially arranged, the limit holes of the upper right hinge plate and the lower right hinge plate are coaxially arranged, and the door body assembly includes a limit rod for passing through the limit holes.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This solution can conveniently open the door on the left or right side at any time, and when opening the door on the left side, the right side will not fall, and when opening the door on the right side, the left side will not fall. Through the coordinated movement among the left transmission device, the intermediate transmission member and the right transmission device, the free opening and closing of the left and right sides of the door body are realized. Description of the Drawings

[0021] Figure 1 It is a schematic structural view of the back of the door body assembly according to an embodiment of the present invention;

[0022] Figure 2 It is a rear view of the door body assembly according to an embodiment of the present invention;

[0023] Figure 3 Is Figure 2 A cross-sectional view taken along the A-A direction in

[0024] Figure 4 Is Figure 2 A cross-sectional view taken along the B-B direction in

[0025] Figure 5 It is a schematic structural view of a partial structure in the upper right part of the door body assembly according to an embodiment of the present invention;

[0026] Figure 6 It is a schematic structural view of the middle part structure of the door body assembly according to an embodiment of the present invention;

[0027] Among them, 100 is the door body assembly; 10 is the door body; 20 is the left transmission device; 21 is the left drive mechanism; 211 is the left gear; 212 is the left rack; 213 is the left elastic member; 22 is the left transmission rod; 231 is the upper left worm; 232 is the upper left gear set; 233 is the upper left limit member; 241 is the lower left worm; 242 is the lower left gear set; 243 is the lower left limit member; 30 is the right transmission device; 31 is the right drive mechanism; 311 is the right gear; 312 is the right rack; 313 is the right elastic member; 32 is the right transmission rod; 331 is the upper right worm; 332 is the upper right gear set; 3321 is the worm gear; 3322 is the gear member; 333 is the upper right limit member; 3331 is the tooth condition; 3332 is the limit rod; 341 is the lower right worm; 342 is the lower right gear set; 343 is the lower right limit member; 40 is the intermediate transmission member; 50 is the left handle; 60 is the right handle; 201 is the upper left hinge plate; 202 is the lower left hinge plate; 203 is the upper right hinge plate; 2031 is the limit hole; 204 is the lower right hinge plate. Specific embodiments

[0028] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0029] It should be understood that the terms expressing relative spatial positions such as "upper", "above", "lower", "below", etc. used herein are for the purpose of facilitating description of the relationship between one unit or feature and another unit or feature as shown in the accompanying drawings. The terms of relative spatial positions may be intended to include different orientations of the device in use or operation other than the orientations shown in the figures.

[0030] An embodiment of the present invention provides a door body assembly that can be swapped between left and right opening at any time and a refrigeration device having the door body assembly, and the door body assembly can realize left opening or right opening at any time.

[0031] The refrigeration device includes a box body and a door body assembly 100. The door body assembly 100 is installed on the box body. A refrigeration compartment with an opening is formed inside the box body, and the door body assembly 100 closes the opening. The refrigeration device can be various devices such as a refrigerator, an upright freezer, a wine cabinet, etc. In this embodiment, the refrigeration device is a refrigerator. Figure 1 Or Figure 2 It is a structural schematic diagram of the door body assembly 100.

[0032] To clearly express the positions and directions described in this embodiment, in this embodiment, the direction of reference to gravity is defined as down, and the opposite direction is defined as up. The user is located in front of the refrigerator, and the opposite direction is defined as the rear. That is to say, the refrigerating compartment is located behind the door body assembly 100, and the door body closes the opening from the front. The two sides of the refrigerator facing the user are respectively the left and right sides. The position of the user's left hand is the left side of the door body, and the position of the user's right hand is the right side of the door body. In Figure 1 or Figure 2 , the illustrated position is looking at the door body assembly 100 from the direction of the refrigerating compartment, that is, looking at the door body assembly 100 from the back to the front. Therefore, the left and right directions in the illustration are opposite to the left and right directions defined from the perspective of the user using the refrigerator. Of course, the left and right directions are only defined for the purpose of distinction and can be interchanged with each other.

[0033] For another example Figure 1 or as shown in FIG. 2, the door body assembly 100 includes a door body 10, a left transmission device 20, a right transmission device 30, and an intermediate transmission member 40. The left transmission device 20 includes a left driving mechanism 21 disposed on the left side of the door body 10, a left transmission rod 22 driven to rotate by the left driving mechanism 21, a first worm portion connected to the left transmission rod 22, a first gear portion meshing with the first worm portion, and a first limiting portion meshing with the first gear portion; the right transmission device 30 includes a right driving mechanism 31 disposed on the right side of the door body 10, a right transmission rod 32 driven to rotate by the right driving mechanism 31, a second worm portion connected to the right transmission rod 32, a second gear portion meshing with the second worm portion, and a second limiting portion meshing with the second gear portion; the intermediate transmission member 40 is used to drive the other transmission device to move through the intermediate transmission member 40 by the left transmission device 20 or the right transmission device 30.

[0034] The left driving mechanism 21 drives the left transmission rod 22 to rotate. During the rotation of the left transmission rod 22, it drives the first worm portion to rotate. The first worm portion drives the first gear portion to rotate, and the first gear portion drives the first limiting portion to move, thus forming the entire drive from the left driving mechanism 21 to the first limiting portion. Similarly, the drive structure of the right transmission mechanism on the right side to the second limiting portion is the same, and the left driving mechanism 21 and the right driving mechanism 31 on both sides are linked through the intermediate transmission member 40.

[0035] The door body assembly 100 has a left-opening state and a right-opening state. In the left-opening state, the left driving mechanism 21 drives the first limiting portion to separate from the box body, and the right driving mechanism 31 drives the second limiting portion to connect with the box body; in the right-opening state, the left driving mechanism 21 drives the first limiting portion to connect with the box body, and the right driving mechanism 31 drives the second limiting portion to separate from the box body. That is to say, the door body assembly 100 will not have the situation where the left driving mechanism 21 and the right driving mechanism 31 on both sides simultaneously drive the first limiting portion and the second limiting portion to separate from the box body, ensuring that the door body assembly 100 will not fall off.

[0036] Further, the door body assembly 100 further includes a left handle 50 and a right handle 60. As shown in Figure 1 , 3 , and 6, both the left handle 50 and the right handle 60 are reciprocally slidably connected to the door body 10 parallel to the door opening direction. The left driving mechanism 21 and the right driving mechanism 31, as well as the left handle 50 and the right handle 60, are symmetrically arranged on the left and right sides of the door body 10. The left handle 50 is used to drive the left driving mechanism 21, and the right handle 60 is used to drive the right driving mechanism 31. When the user needs to open the door from the left side, the left handle 50 can be pulled. At this time, the left handle 50 drives the left side of the door body to move in the door opening direction, and the door opening direction is the direction perpendicular to the front of the box body opening. When the user needs to open the door from the right side, the right handle 60 can be pulled. At this time, the right handle 60 drives the right side of the door body to move in the door opening direction. Both the left handle 50 and the right handle 60 have a holding portion, and the user can insert their fingers into the holding portion, and the holding portion can move in the front-back direction.

[0037] Even further, as shown in Figure 3 or 6, the left driving mechanism 21 includes a left gear 211 and a left rack 212 that mesh with each other. The right driving mechanism 31 includes a right gear 311 and a right rack 312 that mesh with each other. The left rack 212 is connected to the left handle 50, the right rack 312 is connected to the right handle 60, the left transmission rod 22 is fixedly connected to the left gear 211, the right transmission rod 32 is fixedly connected to the right gear 311, and the intermediate transmission member 40 has teeth and can mesh with the left gear 211 and / or the right gear 311. Referring to Figure 3 the structure for describing the movement process, after the left handle 50 moves in the door opening direction, the left rack 212 moves forward, that is, Figure 3 the downward movement in Figure 3 drives the left gear 211 to rotate clockwise, and then drives the intermediate transmission member 40 to move to the right, that is, Figure 3 the left movement in

[0038] Moreover, the left drive mechanism 21 further includes a left elastic member 213, and the right drive mechanism 31 further includes a right elastic member 313. The left elastic member 213 is configured to drive the left handle 50 to move away from the door-opening direction, and the right elastic member 313 is configured to drive the right handle 60 to move away from the door-opening direction. Springs may be provided for the left elastic member 213 and the right elastic member 313. After the left handle 50 or the right handle 60 is pulled to move in the door-opening direction, the left elastic member 213 or the right elastic member 313 can drive the handle back to the initial position. Additionally, after the left elastic member 213 and the right elastic member 313 return to their deformed states, there is still a spatial margin for the left handle 50 or the right handle 60 to move further backward. That is to say, when the left drive mechanism 21 drives the intermediate transmission member 40 to drive the right drive mechanism 31 to rotate, the left drive mechanism 21 moves in the door-opening direction, and the right door-opening mechanism moves in the direction away from the door-opening direction, that is, moves backward. At this time, the right handle 60 is not restricted by the right spring and can continue to move backward.

[0039] In this embodiment, as Figure 2 、 4 shown in FIG. 5, the first worm portion includes an upper left worm 231 and a lower left worm 241, the first gear portion includes an upper left gear set 232 meshing with the upper left worm 231, and a lower left gear set 242 meshing with the lower left worm 241, and the first limiting portion includes an upper left limiting member 233 meshing with the upper left gear set 232 and a lower left limiting member 243 meshing with the lower left gear set 242; the second worm portion includes an upper right worm 331 and a lower right worm 341, the second gear portion includes an upper right gear set 332 meshing with the upper right worm 331 and a lower right gear set 342 meshing with the lower right worm 341, and the second limiting portion includes an upper right limiting member 333 meshing with the upper right gear set 332 and a lower right limiting member 343 meshing with the lower right gear set 342.

[0040] Between the door body and the box body, connections are formed at both the upper and lower ends on the left side and both the upper and lower ends on the right side simultaneously. The purpose is to enable the door body to be connected to the box body at both the upper and lower sides on the other side when one side of the door body is opened.

[0041] Further, the upper right worm 331 is set to a right-handed structure, the lower right worm 341 is set to a left-handed structure, the upper left worm 231 is set to a left-handed structure, and the lower left worm 241 is set to a right-handed structure. More intuitively, the upper left worm 231 and the lower right worm 341 have the same helix direction, and the lower left worm 241 and the upper right worm 331 have the same helix direction. With this structure, when the door is in the left-open state, the upper left limit member 233 moves downward, and the lower left limit member 243 moves upward. At the same time, driven by the intermediate transmission member 40, the left transmission rod 22 and the right transmission rod 32 rotate in the same direction, and the upper left worm 231 and the upper right worm 331 have opposite helix directions. Therefore, when the upper left limit member 233 moves downward, the upper right limit member 333 moves upward. Similarly, the lower left worm 241 and the lower right worm 341 have opposite helix directions. Therefore, when the lower left limit member 243 moves upward, the lower right limit member 343 moves downward. That is to say, the separation of the limit member on one side of the left and right sides from the box body is formed, and the limit member on the other side is fixed more tightly to the box body, preventing the door body assembly 100 from completely detaching from the box body.

[0042] The upper left limit member 233, the lower left limit member 243, the upper right limit member 333, and the lower right limit member 343 all include a limit rod and a tooth condition connected to the limit rod. The box body includes a limit hole 2031 aligned with the limit rod. The upper left gear set 232, the lower left gear set 242, the upper right gear set 332, and the lower right gear set 342 all include a worm gear meshing with the worm and a gear member coaxially connected to the worm gear. The gear member meshes with the tooth condition. Taking Figure 5 the upper right part of the door body assembly 100 shown as an example for illustration, the worm gear 3321 and the worm meet the basic conditions of gear meshing. For example, in the intermediate plane, the module and pressure angle of the worm and the worm gear 3321 are respectively equal, and the helix directions of the worm gear 3321 and the worm are the same. The rotation of the worm drives the rotation of the worm gear 3321, and the worm gear 3321 drives the gear member 3322 to rotate in the same direction. The gear member 3322 drives the tooth condition 3331 to move linearly, and then drives the limit rod 3332 to enter or move away from the limit hole 2031.

[0043] In this embodiment, by adopting the above structure, there is another purpose, which is to utilize the self-locking effect of the worm gear 3321 and the worm. By adjusting the helix angle (lead angle) between the worm gear 3321 and the worm and the friction coefficient of the worm gear 3321 pair, it is controlled that only the worm can drive the worm gear 3321 to rotate, while the worm gear 3321 cannot drive the worm to move. That is to say, the limit rod 3332 cannot move by itself. Since when the limit rod 3332 moves, it needs to drive the tooth condition 3331 to move, the tooth condition 3331 needs to drive the gear part 3322 to move, and the gear part 3322 drives the worm gear 3321 to move, while the worm gear 3321 cannot drive the worm to move, so the limit rod 3332 cannot drive the worm to rotate, that is, the limit rod 3332 will not move by itself. Therefore, the limit rod 3332 will not fall downward by itself under the action of gravity, and when the refrigeration equipment is vibrated, the limit rod 3332 will not move either, ensuring that the door body is always stably fixed on the box body. Specifically, the helix angle (lead angle) and the friction coefficient of the worm gear 3321 pair can be adaptively designed to meet the self-locking conditions.

[0044] In addition, when the limit rod 3332 leaves the limit hole 2031, the door body assembly 100 can be opened on this side, and the limit rod 3332 on the other side is inserted into the limit hole 2031, so that there is mutual restriction between the two. The limit rod 3332 is set to be cylindrical, the limit hole 2031 is set to be circular, and the cooperation between the limit rod 3332 and the limit hole 2031 simultaneously becomes the hinge for the door body to rotate, and the door body rotates around the limit rod 3332 on the other side.

[0045] In addition, the box body of the refrigerator includes an upper left hinge plate 201, a lower left hinge plate 202, an upper right hinge plate 203 and a lower right hinge plate 204. The upper left hinge plate 201, the lower left hinge plate 202, the upper right hinge plate 203 and the lower right hinge plate 204 all have limit holes 2031, and the limit holes 2031 of the upper left hinge plate 201 and the lower left hinge plate 202 are coaxially arranged, and the limit holes 2031 of the upper right hinge plate 203 and the lower right hinge plate 204 are coaxially arranged. The door body assembly 100 includes a limit rod 3332 for passing through the limit hole 2031.

[0046] Compared with the prior art, this embodiment has the following beneficial effects:

[0047] This solution can conveniently open the door on the left or right side at any time. When opening the door on the left side, the right side will not fall, and when opening the door on the right side, the left side will not fall. Through the coordinated movement among the left transmission device 20, the intermediate transmission part 40 and the right transmission device 30, the free opening and closing of both sides of the door body are realized.

[0048] It should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included within the protection scope of the present invention.

Claims

1. A door assembly, which is connected to a cabinet, characterized in that, The door body assembly includes: A door body; A left transmission device, including a left driving mechanism disposed on the left side of the door body, a left transmission rod driven to rotate by the left driving mechanism, a first worm part connected to the left transmission rod, a first gear part meshing with the first worm part, and a first limiting part meshing with the first gear part. The left driving mechanism includes a left gear and a left rack meshing with each other, and the left transmission rod is fixedly connected to the left gear; A right transmission device, including a right driving mechanism disposed on the right side of the door body, a right transmission rod driven to rotate by the right driving mechanism, a second worm part connected to the right transmission rod, a second gear part meshing with the second worm part, and a second limiting part meshing with the second gear part. The right driving mechanism includes a right gear and a right rack meshing with each other, and the right transmission rod is fixedly connected to the right gear; An intermediate transmission member for enabling the left transmission device or the right transmission device to drive the other transmission device to move through the intermediate transmission member; A left handle and a right handle, both the left handle and the right handle are reciprocally slidably connected to the door body parallel to the door opening direction. The left handle is used to drive the left driving mechanism, the right handle is used to drive the right driving mechanism, the left rack is connected to the left handle, the right rack is connected to the right handle, and the intermediate transmission member is in tooth meshing with the left gear and / or the right gear; The door body assembly has a left door opening state and a right door opening state. In the left door opening state, the left handle is pulled to move in the door opening direction, the left driving mechanism drives the first limiting part to separate from the box body, and the right driving mechanism drives the second limiting part to connect with the box body; in the right door opening state, the right handle is pulled to move in the door opening direction, the left driving mechanism drives the first limiting part to connect with the box body, and the right driving mechanism drives the second limiting part to separate from the box body.

2. The door body assembly according to claim 1, characterized in that, The left driving mechanism and the right driving mechanism, as well as the left handle and the right handle, are symmetrically arranged on the left and right sides of the door body.

3. The door body assembly according to claim 1, characterized in that, The left driving mechanism further includes a left elastic member, and the right driving mechanism further includes a right elastic member. The left elastic member is used to drive the left handle to move away from the door opening direction, and the right elastic member is used to drive the right handle to move away from the door opening direction.

4. The door body assembly according to claim 1, wherein, The first worm part includes an upper left worm and a lower left worm, the first gear part includes an upper left gear set meshing with the upper left worm and a lower left gear set meshing with the lower left worm, and the first limiting part includes an upper left limiting member meshing with the upper left gear set and a lower left limiting member meshing with the lower left gear set; The second worm part includes an upper right worm and a lower right worm, the second gear part includes an upper right gear set meshing with the upper right worm and a lower right gear set meshing with the lower right worm, and the second limiting part includes an upper right limiting member meshing with the upper right gear set and a lower right limiting member meshing with the lower right gear set.

5. The door body assembly according to claim 4, characterized in that, The upper right worm is set as a right-handed structure, the lower right worm is set as a left-handed structure, the upper left worm is set as a left-handed structure, and the lower left worm is set as a right-handed structure.

6. The door body assembly according to claim 5, characterized in that, The upper left limiting member, the lower left limiting member, the upper right limiting member, and the lower right limiting member each include a limiting rod and a tooth condition connected to the limiting rod, and the box body includes a limiting hole aligned with the limiting rod.

7. The door body assembly according to claim 6, characterized in that, The upper left gear set, the lower left gear set, the upper right gear set, and the lower right gear set each include a worm gear meshing with the worm and a gear member coaxially connected to the worm gear, and the gear member meshes with the tooth condition.

8. A refrigeration device, characterized in that, It includes a door body assembly according to any one of claims 1 to 7.

9. The refrigeration device according to claim 8, characterized in that, It includes a box body, the box body includes an upper left hinge plate, a lower left hinge plate, an upper right hinge plate, and a lower right hinge plate. The upper left hinge plate, the lower left hinge plate, the upper right hinge plate, and the lower right hinge plate all have limiting holes, and the limiting holes of the upper left hinge plate and the lower left hinge plate are coaxially arranged, and the limiting holes of the upper right hinge plate and the lower right hinge plate are coaxially arranged. The door body assembly includes a limiting rod for passing through the limiting holes.

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