Door opening and closing structure of refrigerator

Abstract

The utility model discloses a door opening and closing structure of a refrigerator. The door opening and closing structure comprises vacuum chucks which are respectively arranged on a refrigerator body and a refrigerator door, the driving assembly is connected between the refrigerator body and the vacuum suction cup of the refrigerator door, and the driving assembly is used for driving the refrigerator door to be opened or closed; the structure further comprises an angle limiting piece, and the angle limiting piece is used for limiting the opening angle of the refrigerator door. The door opening and closing structure simulates the action principle that a person holds the refrigerator from the side face, the thrust action on the door body is avoided by utilizing the scientificity of mechanical distribution, and the stability and durability of a test are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of freezer detection, in particular to a freezer door opening and closing structure. Background Technique

[0002] In the prior art, the freezer door opening and closing structure mainly includes the following parts: an equipment box body, which is mainly used to support internal driving devices and connecting rod structures, etc., and plays a role in counterweight and fixing the overall structure; a driving device, which is powered by a pneumatic cylinder to provide the power required for opening and closing the door body, and the lifting position of the pneumatic cylinder is controlled by a motor; a connecting rod mechanism, which connects the pneumatic cylinder and the freezer door body with a lever linkage component to transmit power to the door and realize movement; a limiting device, which detects and limits the opening angle of the door body through a sensor to meet the usage requirements in different scenarios.

[0003] These parts are mechanically connected and interact with each other to jointly form a traditional door opening structure solution. Among them, the pneumatic cylinder applies a force to the freezer door body through a lever linkage component, causing it to rotate around a fixed axis, thereby realizing opening and closing. The limit sensor ensures that the freezer door body moves within a set angle range by detecting the position feedback signal of the magnetic sheet in the pneumatic cylinder.

[0004] See Figure 1 and Figure 2 As shown, the freezer door opening and closing structure of the prior art has the following defects:

[0005] Excessive force on the door body: In the traditional door opening method, the door body needs to directly bear the instantaneous thrust of the cylinder pull rod, which is likely to cause deformation or even damage. This direct force-bearing method poses challenges to the durability of the door body beyond requirements and will affect the smooth progress of freezer tests.

[0006] Explanation of the pressure schematic diagram of the traditional lever scheme: In this scheme, the pneumatic cylinder 7 generates a pulling force 13, and through the lever linkage component 9, a pushing force 12 towards the inside and a pulling force 14 towards the outside are transmitted to the freezer door body 10. However, due to the low temperature, a certain negative pressure 11 will be generated inside the cabinet to resist this pulling force 14, resulting in all the pushing forces 12 approaching the pulling force 13 before the door is opened, causing deformation or even damage to the freezer door body 10.

[0007] Insufficient structural stability and durability: Since the traditional structural solution is fixed by its own structural weight, the 13 pulling force of the cylinder may cause a slight displacement of the 12 equipment box body, and over time, the 9 lever linkage component may fall off, causing danger.

[0008] Inaccurate opening angle control: Due to the influence of negative pressure 11, the pulling force 13 is too large during door opening in the traditional door opening method. After the limit sensor 6 feeds back the stop signal, the pull rod cannot stop quickly due to the inertia generated during door opening, so that the cold cabinet door body 10 cannot be stably stopped within the ideal door opening angle range of 62° - 68°, affecting the consistency and accuracy of test data.

[0009] Low operation convenience and efficiency: The traditional door opening structure scheme usually includes multiple mechanical components, resulting in relatively complex operations, including: motor linkage shaft 3, motor control unit 4, threaded support component 5, limit sensor 6, pneumatic cylinder 7, electric motor 8, etc. And its structural design relies on its own weight to fix the position, so it is very inconvenient to move back and forth during use, thus reducing the test efficiency.

[0010] Large installation size and occupying a lot of space: Due to design limitations, the traditional door opening structure usually requires an installation space of 2 square meters, which limits the space occupancy rate and flexibility of the laboratory. When conducting tests on multiple cold cabinets in the same laboratory, there may be interference due to insufficient space, affecting the utilization rate of the laboratory.

[0011] Therefore, based on the above technical problems, those skilled in the art urgently need to develop a cold cabinet door opening and closing structure. Utility Model Content

[0012] The purpose of the present utility model is to provide a cold cabinet door opening and closing structure, which effectively avoids the thrust on the door body and improves the stability and durability of the test.

[0013] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0014] A cold cabinet door opening and closing structure of the present utility model, the structure includes:

[0015] Vacuum suction cups respectively installed on the cold cabinet body and the cold cabinet door; and

[0016] A drive assembly connected between the vacuum suction cups of the cold cabinet body and the cold cabinet door, the drive assembly is used to drive the cold cabinet door to open or close;

[0017] The structure further includes:

[0018] An angle limiting member, the angle limiting member is used to limit the opening angle of the cold cabinet door.

[0019] Furthermore, a fixed base is installed on the side of the cold cabinet body;

[0020] The fixed base includes:

[0021] Two of the vacuum suction cups; and

[0022] A fixed support member connected to the side of the freezer cabinet body through the vacuum suction cup.

[0023] Furthermore, the freezer door is connected with a rocker arm through a vacuum suction cup;

[0024] One end of the rocker arm close to the fixed support member is hinged to the end of the fixed support member.

[0025] Furthermore, a pneumatic cylinder is connected to the first end of the fixed support member. The cylinder body of the pneumatic cylinder is hinged to the first end of the fixed support member, and the cylinder rod of the pneumatic cylinder is hinged to the proximal end of the rocker arm;

[0026] The second end of the fixed support member is hinged to the connecting portion of the convex part of the rocker arm.

[0027] Furthermore, an angle limiting member is movably connected between the fixed support member and the rocker arm near the position of its first end;

[0028] One end of the angle limiting member is hinged to the fixed support member. A first oblong slot is opened at the end of the angle limiting member that cooperates with the rocker arm. The angle limiting member is movably connected to the rocker arm through the first oblong slot and a mounting member.

[0029] Furthermore, a second oblong slot is opened at the position where the rocker arm cooperates with the vacuum suction cup. The vacuum suction cup is movably connected to the rocker arm through the second oblong slot and a mounting member.

[0030] Furthermore, the vacuum suction cup includes:

[0031] A suction cup outer cover. Two channels are formed inside the suction cup outer cover, namely a vacuum pump negative pressure channel and an atmospheric pressure channel. And the two channels are switched by a hand-operated valve switch. Check valves are installed on the two channels inside the suction cup outer cover;

[0032] A bottom drag placed at the bottom of the suction cup outer cover. Rubber suction cups are arranged at the bottom of the bottom drag;

[0033] A suction cup top cover is installed at the upper end of the suction cup outer cover.

[0034] In the above technical solution, a freezer door opening and closing structure provided by the present utility model has the following beneficial effects:

[0035] The door opening and closing structure of the present utility model simulates the action principle of a person holding the freezer from the side, utilizes the scientific nature of the mechanical distribution, avoids the thrust force on the door body, and improves the stability and durability of the test. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0037] Figure 1 Structural schematic of the door opening and closing structure in the prior art Figure 1 ;

[0038] Figure 2 Structural schematic of the door opening and closing structure in the prior art Figure 2 ;

[0039] Figure 3 Structural schematic diagram of a freezer door opening and closing structure disclosed in an embodiment of the present utility model;

[0040] Figure 4 Structural schematic diagram of a vacuum suction cup of a freezer door opening and closing structure disclosed in an embodiment of the present utility model;

[0041] Figure 5 Exploded view of the structure of a vacuum suction cup of a freezer door opening and closing structure disclosed in an embodiment of the present utility model.

[0042] Explanation of reference numerals:

[0043] 1, freezer cabinet body; 10, freezer door;

[0044] 7, pneumatic cylinder;

[0045] 15, vacuum suction cup; 16, vacuum pump negative pressure channel; 17, atmospheric pressure channel; 18, hand-operated valve; 19, rubber suction cup; 20, fixed support member; 21, angle limiting member; 22, rocker arm; 23, suction cup top cover; 24, one-way valve; 25, muffler; 26, suction cup outer cover; 27, bottom drag; 28, rubber suction cup. Detailed implementation manners

[0046] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0047] See Figures 3 to 5 as shown;

[0048] A freezer door opening and closing structure of this embodiment, this structure includes:

[0049] Vacuum suction cups 15 respectively installed on the freezer cabinet body 1 and the freezer door 10; and

[0050] A drive assembly is connected between the freezer cabinet body 1 and the vacuum suction cups 15 of the freezer door 10, and the drive assembly is used to drive the freezer door 10 to open or close;

[0051] The structure further includes:

[0052] An angle limiting member 21, and the angle limiting member 21 is used to limit the opening angle of the freezer door 10.

[0053] Specifically, this embodiment discloses a door opening and closing structure based on an embracing structure. A drive assembly is connected between the freezer cabinet body 1 and the freezer door 10 through vacuum suction cups 15, and is fixed on the side wall of the freezer cabinet body 1 through a vacuum suction cup group to provide a stable support foundation. The rocker arm structure similar to a human arm realizes the opening and closing of the freezer door 10 through the drive of the drive assembly. And the structure of this embodiment also designs an angle limiting member 21 that can limit the opening range of the freezer door 10.

[0054] Preferably, a fixed base is installed on the side of the freezer cabinet body 1 in this embodiment;

[0055] The fixed base includes two vacuum suction cups 15; and a fixed support member 20 connected to the side of the freezer cabinet body 1 through the vacuum suction cups 15.

[0056] Secondly, the freezer door 10 of this embodiment is connected with a rocker arm 22 through a vacuum suction cup 15; one end of the rocker arm 22 close to the fixed support member 20 is hinged to the end of the fixed support member 20.

[0057] The specific connection relationship and connection structure of the drive assembly and the angle limiting member 21 in this embodiment are: a pneumatic cylinder 7 is connected to the first end of the fixed support member 20, the cylinder body of the pneumatic cylinder 7 is hinged to the first end of the fixed support member 20, and the cylinder rod of the pneumatic cylinder 7 is hinged to the proximal end of the rocker arm 22; secondly, the second end of the fixed support member 20 is hinged to the convex connecting portion of the rocker arm 22.

[0058] Preferably, an angle limiting member 21 is movably connected between the fixed support member 20 and the rocker arm 22 near the first end thereof;

[0059] One end of the angle limiting member 21 is hinged to the fixed support member 20, a first oblong slot is opened at the end where the angle limiting member 21 cooperates with the rocker arm 22, and the angle limiting member 21 is movably connected to the rocker arm 22 through the first oblong slot and a mounting member.

[0060] An oblong slot is opened at the position where the rocker arm 22 cooperates with the vacuum suction cup 15, and the vacuum suction cup 15 is movably connected to the rocker arm 22 through the oblong slot and a mounting member.

[0061] In this embodiment, the rocker arm 22 uses the fixed support 20 as the lever fulcrum, and the pneumatic cylinder 7 drives the rocker arm 22 to open to the angular position of the angle limiter 21. The vacuum suction cup 15 on the cold cabinet door 10 slides through the second oblong groove sliding rod of the rocker arm 22, so that the opening angle of the cold cabinet door 10 is at an ideal opening angle of 65° ± 3°.

[0062] Preferably, the vacuum suction cup 15 of this embodiment includes:

[0063] The suction cup outer cover 26 forms two channels inside, namely the vacuum pump negative pressure channel 16 and the atmospheric pressure channel 17 respectively. And the two channels are switched by the hand-operated valve 18. One-way valves 24 are installed on the two channels inside the suction cup outer cover 26;

[0064] The bottom drag 27 placed at the bottom of the suction cup outer cover 26, and a rubber suction cup 28 is arranged at the bottom of the bottom drag 27;

[0065] The upper end of the suction cup outer cover 26 is equipped with a suction cup top cover 23.

[0066] The vacuum suction cup 15 of this embodiment controls the pneumatic by using the hand-operated valve 18, and utilizes the conversion of connecting the vacuum pump negative pressure channel 16 and the atmospheric pressure channel 17 by the rubber suction cup 28 to achieve the function of fixing and detaching from the adsorption surface.

[0067] In the above technical solution, a cold cabinet door opening and closing structure provided by the present utility model has the following beneficial effects:

[0068] The door opening and closing structure of the present utility model simulates the action principle of a person holding the cold cabinet from the side, and utilizes the scientific nature of the mechanical distribution to avoid the thrust on the door body, and improves the stability and durability of the test.

[0069] The door opening and closing structure of the present utility model significantly reduces the force on the door body: In the traditional door opening method, the cold cabinet door directly serves as the force-bearing point of the lever, and will receive a thrust of 500 - 600 Newtons applied by the cylinder pull rod, which may cause deformation or damage to the door body. While the "door opening and closing embrace structure" effectively absorbs the thrust of the pneumatic cylinder 7 pull rod through the ingenious design of the rocker arm structure and the support structure, and significantly reduces the thrust acting on the door body to less than 300 Newtons, a reduction of 40% - 50% in the acting force compared with the traditional method, thus ensuring the smooth progress of the cold cabinet test.

[0070] Enhance the stability and safety of the structure: The whole structure is made of high-strength and corrosion-resistant 304 stainless steel material, ensuring the stability of the structure and a long service life. At the same time, through the negative pressure adsorption method of connecting the vacuum suction cup group to the vacuum pump, a firm connection with the cold cabinet box body is achieved, avoiding potential safety hazards caused by unstable connection, and improving the safety of the cold cabinet test.

[0071] Precise control of the opening angle: In the "door opening and closing embrace structure", the addition of the angle limiting structure enables precise control of the opening angle of the door body. Whether it is a full opening of 90° or a more precise rotation of 65°, it can meet the usage requirements in different scenarios and improve the consistency of test data.

[0072] Improve the convenience and efficiency of operation: The embrace structure adopts a portable design, and the overall weight is controlled at about 15 kg. In particular, the hand valve switch design adopted by the developed vacuum suction cup group enables users to quickly and conveniently achieve adsorption and detachment, greatly improving the convenience and efficiency of operation. In addition, the slideway design of the rocker lever ensures the smoothness of the door body during the opening process, reduces extra friction and resistance, and improves the cold cabinet test efficiency.

[0073] Optimize the installation size of the structure: The traditional door opening structure requires an installation size of approximately 2 square meters. The "door opening and closing embrace structure" effectively reduces the space occupied by installation. The installation size is reduced to 0.3 square meters, a reduction of 85% in occupied space compared to the same period. Conducting tests on multiple cold cabinets in the same laboratory will not affect each other, effectively improving the utilization rate of the laboratory.

[0074] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A cold cabinet door opening and closing structure, characterized in that, The structure includes: Vacuum suckers (15) respectively installed on the refrigerator cabinet body (1) and the refrigerator door (10); and A driving assembly connected between the vacuum suckers (15) of the refrigerator cabinet body (1) and the refrigerator door (10), the driving assembly being used to drive the refrigerator door (10) to open or close; The structure further includes: An angle limiting member (21), the angle limiting member (21) being used to limit the opening angle of the refrigerator door (10).

2. The structure of a freezer door opening and closing according to claim 1, characterized in that, A fixed base is installed on the side of the refrigerator cabinet body (1); The fixed base includes: Two of the vacuum suckers (15); and A fixed support member (20) connected to the side of the refrigerator cabinet body (1) through the vacuum suckers (15).

3. The cold cabinet door opening and closing structure according to claim 2, characterized in that, The refrigerator door (10) is connected with a swing arm (22) through a vacuum sucker (15); One end of the swing arm (22) close to the fixed support member (20) is hinged to the end of the fixed support member (20).

4. The cold cabinet door opening and closing structure according to claim 3, characterized in that, A pneumatic cylinder (7) is connected to the first end of the fixed support member (20), the cylinder body of the pneumatic cylinder (7) is hinged to the first end of the fixed support member (20), and the cylinder rod of the pneumatic cylinder (7) is hinged to the proximal end of the swing arm (22); The second end of the fixed support member (20) is hinged to the convex connecting portion of the swing arm (22).

5. The cold cabinet door opening and closing structure according to claim 4, characterized in that, The angle limiting member (21) is movably connected between the fixed support member (20) and the swing arm (22) at a position close to its first end; One end of the angle limiting member (21) is hinged to the fixed support member (20), a first oblong groove is formed at one end of the angle limiting member (21) cooperating with the swing arm (22), and the angle limiting member (21) is movably connected to the swing arm (22) through the first oblong groove and a mounting member.

6. The structure of a freezer door opening and closing according to claim 3, characterized in that, A second oblong groove is formed at the position where the swing arm (22) cooperates with the vacuum sucker (15), and the vacuum sucker (15) is movably connected to the swing arm (22) through the second oblong groove and a mounting member.

7. A freezer door opening and closing structure according to any one of claims 1 to 6, characterized in that, The vacuum sucker (15) includes: A sucker outer cover (26), two channels are formed inside the sucker outer cover (26), namely a vacuum pump negative pressure channel (16) and an atmospheric pressure channel (17), and the two channels are switched by a hand-operated valve (18), and check valves (24) are installed on the two channels inside the sucker outer cover (26); A bottom drag (27) placed at the bottom of the sucker outer cover (26), a rubber sucker (28) is provided at the bottom of the bottom drag (27); A sucker top cover (23) is installed at the upper end of the sucker outer cover (26).

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