Door opening driving device and double-door refrigerator

Abstract

The utility model relates to a door opening driving device and a double-door refrigerator, the double-door refrigerator comprises a first door body and a second door body, and the door opening driving device is used for pushing the first door body and the second door body open. The door opening driving device comprises a driving motor, a transmission gear set, a first push rod and a second push rod, the transmission gear set is connected to an output shaft of the driving motor, the first push rod and the second push rod are symmetrically arranged on the two sides of the transmission gear set, and first rack parts are arranged on the side faces, close to the transmission gear set, of the first push rod and the second push rod correspondingly; and the first rack part is meshed with the transmission gear set. When the driving motor drives the transmission gear set to rotate, the moving direction of the first push rod is opposite to the moving direction of the second push rod. According to the door opening driving device and the double-door refrigerator, the cost of the door opening driving device is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to a door opening drive device and a double-door refrigerator. Background Art

[0002] Double-door refrigerators are popular because they take up little space when opening the doors and are simple and beautiful. Usually, a door opening drive device is set to open the double-door refrigerator. In order to facilitate pushing open the two doors, the common door opening drive device usually includes two power sources and two push rods, one of which is connected to one power source and is used to push open one of the doors; the other push rod is connected to the other power source and is used to push open the other door. As a result, the cost of the door opening drive device is relatively high. Utility Model Content

[0003] Based on this, it is necessary to provide a door opening drive device and a double-door refrigerator that can reduce costs.

[0004] A door opening drive device for a double-door refrigerator, the double-door refrigerator comprises a first door body and a second door body, and the door opening drive device is used to push open the first door body and the second door body. The door opening drive device comprises a driving motor, a transmission gear set, a first push rod and a second push rod, the transmission gear set is connected to the output shaft of the driving motor, the first push rod and the second push rod are symmetrically arranged on both sides of the transmission gear set, and the first push rod and the second push rod have first rack parts on the sides close to the transmission gear set, and the first rack parts are meshed with the transmission gear set. Wherein, as the driving motor drives the transmission gear set to rotate, the moving direction of the first push rod is opposite to the moving direction of the second push rod.

[0005] In one embodiment, the transmission gear set includes an input gear, a first gear and a second gear;

[0006] The input gear is mounted on the output shaft of the driving motor. One side of the first gear meshes with the input gear, and the other side meshes with the first rack portion of the first push rod. One side of the second gear meshes with the input gear, and the other side meshes with the first rack portion of the second push rod.

[0007] In one embodiment, the first gear and / or the second gear includes a large gear portion and a small gear portion, and the diameter of the large gear portion is larger than the diameter of the small gear portion; along the axial direction of the first gear and / or the second gear, the large gear portion is located above the small gear portion, and the large gear portion is meshed with the input gear, and the small gear portion is meshed with the first rack portion.

[0008] In one of the embodiments, the door opening drive device also includes two supporting gear groups, one of which is located on the side of the first push rod away from the transmission gear group, and the other is located on the side of the second push rod away from the transmission gear group. The first push rod and the second push rod are respectively provided with second rack portions corresponding to the supporting gear groups, and the second rack portions are meshed with the supporting gear groups.

[0009] In one embodiment, the door opening drive device also includes a shell, and the drive motor, the transmission gear group, the supporting gear group, the first push rod, and the second push rod are respectively installed in the shell, and at least a portion of the first push rod extends out of the shell and is used to abut the first door body, and at least a portion of the second push rod extends out of the shell and is used to abut the second door body.

[0010] In one embodiment, the first push rod and the second push rod respectively include a main body and a rod body, the first rack portion and the second rack portion are both opened in the main body, the main body is movably arranged in the shell, and one end of the rod body is connected to the main body and the other end extends out of the shell.

[0011] In one embodiment, a connector is provided at one end of each rod away from the main body, and the cross-sectional area of ​​the connector is larger than the cross-sectional area of ​​the rod.

[0012] In one of the embodiments, the door opening drive device further includes two limiting sleeves, which are fixedly mounted on the outside of the shell, and each limiting sleeve is correspondingly sleeved on the outer peripheral wall of a rod body.

[0013] In one embodiment, the shell includes an upper cover and a lower cover, the upper cover is provided with a first convex portion, the lower cover is provided with a second convex portion, the upper cover and the lower cover are buckled with each other, and the first convex portion and the second convex portion are correspondingly inserted into the same limiting sleeve.

[0014] A double-door refrigerator comprises a first door body, a second door body and a door opening drive device as described in any one of the above embodiments.

[0015] Compared with the prior art, the door opening drive device and double-door refrigerator provided by the present application, because the first push rod and the second push rod are respectively located on both sides of the transmission gear set, and are respectively engaged with the transmission gear set through the first rack portion thereon, when the transmission gear set rotates, the movement directions of the first push rod and the second push rod are opposite. In addition, the first push rod and the second push rod share a power source, the driving motor, and the rotation direction of the transmission gear set can be changed by changing the rotation direction of the output shaft of the driving motor, so that the first push rod pushes open the first door body, or the second push rod pushes open the second door body. This is conducive to reducing the cost of the door opening drive device and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of the door opening drive device provided in this application;

[0018] Figure 2 An exploded view of the door opening drive device provided for this application;

[0019] Figure 3 A partial schematic diagram of the door opening drive device provided in this application;

[0020] Figure 4 for Figure 3 Schematic diagram from another perspective;

[0021] Figure 5 This is a schematic diagram of the structure of the first gear provided in this application.

[0022] : Figure numerals: 10, first door body; 20, second door body; 30, door opening drive device; 31, drive motor; 32, transmission gear set; 321, input gear; 322, first gear; 322a, large gear part; 322b, small gear part; 323, second gear; 33, first push rod; 331, first rack part; 332, main body; 333, rod body; 334, second rack part; 335, connector; 34, second push rod; 35, shell; 351, upper cover; 351a, first convex part; 352a, second convex part; 352, lower cover; 36, support gear set; 38, limiting sleeve. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of 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 violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0028] See also Figures 1 to 4The present application provides a door opening drive device 30 for a double-door refrigerator, the double-door refrigerator comprises a first door body 10 and a second door body 20, and the door opening drive device 30 is used to push open the first door body 10 and the second door body 20. The door opening drive device 30 comprises a driving motor 31, a transmission gear set 32, a first push rod 33 and a second push rod 34, the transmission gear set 32 ​​is connected to the output shaft of the driving motor 31, the first push rod 33 and the second push rod 34 are symmetrically arranged on both sides of the transmission gear set 32, and the first push rod 33 and the second push rod 34 are respectively provided with a first rack portion 331 on the side close to the transmission gear set 32, and the first rack portion 331 is meshed with the transmission gear set 32. Wherein, as the driving motor 31 drives the transmission gear set 32 ​​to rotate, the moving direction of the first push rod 33 is opposite to the moving direction of the second push rod 34.

[0029] It is understandable that, since the first push rod 33 and the second push rod 34 are respectively located on both sides of the transmission gear set 32 ​​and mesh with the transmission gear set 32 ​​through the first rack portion 331 thereon, when the transmission gear set 32 ​​rotates, the movement directions of the first push rod 33 and the second push rod 34 are opposite. In addition, the first push rod 33 and the second push rod 34 share a power source, the driving motor 31, and the rotation direction of the transmission gear set 32 ​​can be changed by changing the rotation direction of the output shaft of the driving motor 31, so that the first push rod 33 pushes open the first door body 10, or the second push rod 34 pushes open the second door body 20. This is conducive to reducing the cost of the door opening drive device 30 and saving energy.

[0030] For example, in one embodiment, Figure 3 and Figure 4 As shown, the first push rod 33 and the second push rod 34 are arranged in parallel, and the first push rod 33 is located on the left side of the transmission gear set 32, and the second push rod 34 is located on the right side of the transmission gear set 32. The first door body 10 and the second door body 20 are respectively attached to the same end of the first push rod 33 and the second push rod 34. As the output shaft of the driving motor 31 rotates clockwise, the transmission gear set 32 ​​drives the first push rod 33 to move toward the direction close to the first door body 10 to open the first door body 10, and drives the second push rod 34 to move in the direction away from the second door body 20. As the output shaft of the driving motor 31 rotates counterclockwise, the transmission gear set 32 ​​drives the second push rod 34 to move toward the direction close to the second door body 20 to open the second door body 20, and drives the first push rod 33 to move in the direction away from the first door body 10.

[0031] Optionally, in one embodiment, if Figure 3 and Figure 4As shown, the transmission gear set 32 ​​includes an input gear 321, a first gear 322 and a second gear 323. The input gear 321 is mounted on the output shaft of the driving motor 31. One side of the first gear 322 is meshed with the input gear 321, and the other side is meshed with the first rack portion 331 of the first push rod 33; one side of the second gear 323 is meshed with the input gear 321, and the other side is meshed with the first rack portion 331 of the second push rod 34. In this embodiment, the input gear 321 drives the first push rod 33 to move through the first gear 322, and the input gear 321 drives the second push rod 34 to move through the second gear 323.

[0032] In other embodiments, the first gear 322 and the second gear 323 may not be provided, and the input gear 321 directly meshes with the first rack portion 331 , thereby directly driving the first push rod 33 and the second push rod 34 to move.

[0033] See also Figure 4 and Figure 5 The first gear 322 and / or the second gear 323 includes a large gear portion 322a and a small gear portion 322b, wherein the diameter of the large gear portion 322a is greater than the diameter of the small gear portion 322b. Along the axial direction of the first gear 322 and / or the second gear 323, the large gear portion 322a is located above the small gear portion 322b, and the large gear portion 322a is meshed with the input gear 321, and the small gear portion 322b is meshed with the first rack portion 331. In other words, only the first gear 322 can be configured to be arranged in a form in which the large gear part 322a and the small gear part 322b are distributed up and down along its own axial direction, so as to reduce the radial size of the transmission gear set 32; or only the second gear 323 can be configured to be arranged in a form in which the large gear part 322a and the small gear part 322b are distributed up and down along its own circumferential direction; or the first gear 322 and the second gear 323 can be configured to be arranged in a form in which the large gear part 322a and the small gear part 322b are distributed up and down along the axial direction. In this way, the axial space of the transmission gear set 32 ​​can be fully utilized and the radial size of the transmission gear set 32 ​​can be reduced.

[0034] like Figure 3As shown, the door opening drive device 30 also includes two supporting gear sets 36, one of which is located on the side of the first push rod 33 away from the transmission gear set 32, and the other is located on the side of the second push rod 34 away from the transmission gear set 32. The first push rod 33 and the second push rod 34 are respectively provided with second rack parts 334 corresponding to the supporting gear sets 36, and the second rack parts 334 are meshed with the supporting gear sets 36. In this way, during the movement of the first push rod 33, the supporting gear set 36 cooperates with the second rack part 334 to play a supporting and guiding role, so that the first push rod 33 moves more smoothly. Similarly, during the movement of the second push rod 34, the supporting gear set 36 cooperates with the second rack part 334 to play a supporting and guiding role, so that the second push rod 34 moves more smoothly.

[0035] Optionally, the supporting gear set 36 may be configured as a single gear, or may be configured as a plurality of gears spaced apart and distributed along the moving direction of the first push rod 33 or the second push rod 34 .

[0036] See also Figure 1 and Figure 2 The door opening drive device 30 further includes a housing 35, in which the drive motor 31, the transmission gear set 32, the support gear set 36, the first push rod 33, and the second push rod 34 are respectively installed, and at least a portion of the first push rod 33 extends out of the housing 35 and is used to abut against the first door body 10, and at least a portion of the second push rod 34 extends out of the housing 35 and is used to abut against the second door body 20. The housing 35 is used to protect the drive motor 31, the transmission gear set 32, and the support gear set 36, and is convenient for installing the drive motor 31 and the transmission gear set 32 ​​on the double-door refrigerator.

[0037] See also Figure 2 and Figure 3 The first push rod 33 and the second push rod 34 include a main body 332 and a rod body 333, respectively. The first rack part 331 and the second rack part 334 are both provided in the main body 332. The main body 332 is movably arranged in the housing 35. One end of the rod body 333 is connected to the main body 332 and the other end extends out of the housing 35. In this way, the first rack part 331 and the second rack part 334 are always located inside the housing 35. When a lubricant with a lubricating effect needs to be applied to the first rack part 331 or the second rack part 334, the lubricant on the first rack part 331 will not be emitted outside the housing 35. In addition, the second rack part 334 is meshed with the supporting gear set 36, which can prevent the first push rod 33 and the second push rod 34 from directly contacting the inner wall of the housing 35 when moving and generating relatively large noise.

[0038] Each rod 333 is provided with a connector 335 at one end away from the main body 332, and the cross-sectional area of ​​the connector 335 is larger than the cross-sectional area of ​​the rod 333. By providing the connector 335, the contact area between the rod 333 and the first door 10 or the second door 20 is increased, so that the rod 333 can be prevented from scratching the first door 10 or the second door 20.

[0039] See also Figure 1 and Figure 2 The door opening drive device 30 further includes two limiting sleeves 38, which are fixedly mounted on the outer side of the housing 35, and each limiting sleeve 38 is correspondingly sleeved on the outer peripheral wall of a rod body 333. The limiting sleeve 38 supports the first push rod 33 or the second push rod 34.

[0040] Furthermore, the connector 335 can be stopped by the limiting sleeve 38 , thereby preventing the first push rod 33 or the second push rod 34 from excessively extending into the housing 35 .

[0041] Furthermore, the housing 35 includes an upper cover 351 and a lower cover 352, the upper cover is provided with a first convex portion 351a, the lower cover is provided with a second convex portion 352a, the upper cover 351 and the lower cover 352 are buckled with each other, and the first convex portion 351a and the second convex portion 352a are correspondingly inserted into the same limiting sleeve 38. In this way, there is no need to provide fasteners such as screws, and the limiting sleeve 38 can prevent the limiting sleeve 38 from being disengaged from the upper and lower parts, so that the upper cover 351 and the lower cover 352 are firmly buckled together.

[0042] The present application also provides a double-door refrigerator, which includes a first door body 10, a second door body 20 and a door opening drive device 30 as described in any one of the above embodiments.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0044] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A door opening drive device for a double-door refrigerator, the double-door refrigerator comprising a first door body (10) and a second door body (20), the door opening drive device (30) being used to push open the first door body (10) and the second door body (20); It is characterized in that The door opening drive device (30) comprises a driving motor (31), a transmission gear set (32), a first push rod (33) and a second push rod (34); the transmission gear set (32) is connected to the output shaft of the driving motor (31); the first push rod (33) and the second push rod (34) are symmetrically arranged on both sides of the transmission gear set (32); and the first push rod (33) and the second push rod (34) are respectively provided with a first rack portion (331) on the side close to the transmission gear set (32); and the first rack portion (331) is meshed with the transmission gear set (32); Wherein, as the driving motor (31) drives the transmission gear set (32) to rotate, the moving direction of the first push rod (33) is opposite to the moving direction of the second push rod (34).

2. The door opening drive device for a double-door refrigerator according to claim 1, characterized in that: The transmission gear set (32) comprises an input gear (321), a first gear (322) and a second gear (323); The input gear (321) is mounted on the output shaft of the driving motor (31); one side of the first gear (322) is meshed with the input gear (321), and the other side is meshed with the first rack portion (331) of the first push rod (33); one side of the second gear (323) is meshed with the input gear (321), and the other side is meshed with the first rack portion (331) of the second push rod (34).

3. The door opening drive device for a double-door refrigerator according to claim 2, characterized in that: The first gear (322) and / or the second gear (323) comprises a large gear portion (322a) and a small gear portion (322b), and the diameter of the large gear portion (322a) is larger than the diameter of the small gear portion (322b); Along the axial direction of the first gear (322) and / or the second gear (323), the large gear portion (322a) is located above the small gear portion (322b), and the large gear portion (322a) is meshed with the input gear (321), and the small gear portion (322b) is meshed with the first rack portion (331).

4. The door opening drive device for a double-door refrigerator according to claim 1, characterized in that: The door opening drive device (30) also includes two supporting gear sets (36), one of which is located on the side of the first push rod (33) away from the transmission gear set (32), and the other of which is located on the side of the second push rod (34) away from the transmission gear set (32), and the first push rod (33) and the second push rod (34) are respectively provided with second rack portions (334) corresponding to the supporting gear sets (36), and the second rack portion (334) is meshed with the supporting gear set (36).

5. The door opening drive device for a double-door refrigerator according to claim 4, characterized in that: The door opening drive device (30) also includes a shell (35), and the drive motor (31), the transmission gear group (32), the support gear group (36), the first push rod (33), and the second push rod (34) are respectively installed in the shell (35), and at least a part of the first push rod (33) extends out of the shell (35) and is used to abut the first door body (10), and at least a part of the second push rod (34) extends out of the shell (35) and is used to abut the second door body (20).

6. The door opening drive device for a double-door refrigerator according to claim 5, characterized in that: The first push rod (33) and the second push rod (34) respectively include a main body (332) and a rod body (333); the first rack portion (331) and the second rack portion (334) are both opened in the main body (332); the main body (332) is movably arranged in the shell (35); one end of the rod body (333) is connected to the main body (332) and the other end protrudes from the shell (35).

7. The door opening drive device for a double-door refrigerator according to claim 6, characterized in that: A connecting head (335) is provided at one end of each rod body (333) away from the main body (332), and the cross-sectional area of ​​the connecting head (335) is larger than the cross-sectional area of ​​the rod body (333).

8. The door opening drive device for a double-door refrigerator according to claim 7, characterized in that: The door opening drive device (30) further comprises two limiting sleeves (38), wherein the limiting sleeves (38) are fixedly mounted on the outside of the shell (35), and each limiting sleeve (38) is correspondingly sleeved on the outer peripheral wall of one of the rod bodies (333).

9. The door opening drive device for a double-door refrigerator according to claim 8, characterized in that: The shell (35) comprises an upper cover (351) and a lower cover (352); the upper cover (351) is provided with a first convex portion (351a), and the lower cover (352) is provided with a second convex portion (352a); the upper cover (351) and the lower cover (352) are buckled with each other, and the first convex portion (351a) and the second convex portion (352a) are correspondingly inserted into the same limiting sleeve (38).

10. A double-door refrigerator, characterized in that: The double-door refrigerator comprises a first door body (10), a second door body (20), and a door opening drive device (30) according to any one of claims 1 to 9.

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