Hinge and refrigerator comprising same

Abstract

This utility model provides a hinge and a refrigerator including the same. The hinge includes: a first buffer device mounted on a first drive arm; and a second buffer device mounted on the front end of a second drive arm. The first and second buffer devices can abut or separate. The hinge also includes a first limiting part and a second limiting part, which can abut and separate, and are used to limit the maximum distance between the second end of the first buffer device and the first end of the buffer device when the first and second limiting parts abut. The refrigerator includes a cabinet, a door, and the aforementioned hinge. The method of using the abutment of the first and second limiting parts to prevent the first buffer device from excessively loosening outward helps to avoid excessive wear between components. The limiting components and the first buffer device are installed in the receiving cavity, making the limiting components and the first buffer device less affected by external factors and less prone to rust.

Description

Technical Field

[0001] This utility model relates to the field of refrigerators, and in particular to a hinge and a refrigerator including the hinge. Background Technology

[0002] Refrigerator hinges are currently the most commonly used connecting parts for opening and closing refrigerator doors. To ensure good closure between the refrigerator door and the refrigerator cabinet after opening or closing, existing refrigerator hinges typically employ a six-bar linkage mechanism. Inside the six-bar hinge, there is often an additional spring module. Its function is to assist the door in automatically closing when the opening angle of the refrigerator door is less than a certain degree, and also to provide a certain sealing force.

[0003] Spring modules on the market generally have a relatively fixed form, consisting of several fixed components, as shown in patent number CN108332498B. To ensure that the spring module moves linearly horizontally during operation, a slot is typically provided on the rod, and the shaft is installed within the slot. This ensures that the spring can extend or compress linearly along the slot.

[0004] The aforementioned prior art (CN108332498B) has two main drawbacks:

[0005] Firstly, the spring's functional logic relies on the compression and friction generated by certain features in the contact area. For example, in the diagram above, the spring generates rebound force through compression and friction between the roller and the component. However, after prolonged use, because the component is a roller that can rotate around its axis, the friction area is usually limited to a finite range. That is, the compression and friction generated each time the spring opens and closes only affects a small portion of the component. The end result is that wear marks on the roller are not obvious, while wear is significant in the contact area of ​​the component, affecting its functionality.

[0006] Secondly, because the shaft is installed within the slotted groove, it rubs against the edge of the groove every time the door opens and closes. When the product is newer, the friction is high, and adjusting the spring parameters accordingly can achieve a better opening and closing effect. However, long-term friction causes the slotted groove to enlarge and the shaft to thin, reducing the friction between them. At this point, the spring's rebound force exceeds the resistance, resulting in poor performance. Furthermore, the slotted groove and sliding shaft are exposed to air, and rust may occur in these areas, which is also a significant factor affecting friction. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the defects of obvious wear and easy rust when the components of the hinge are connected in the prior art, and to provide a hinge and a refrigerator containing the hinge.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A hinge for opening and closing a refrigerator door, the hinge comprising:

[0010] The first mounting bracket is used for installation on the refrigerator body;

[0011] The second fixing seat is used for installation on the door body;

[0012] A transmission assembly is hinged between a first fixed base and a second fixed base. The transmission assembly includes a first transmission arm and a second transmission arm. The front end of the first transmission arm is hinged to the first fixed base, the rear end of the first transmission arm is hinged to the front end of the second transmission arm, and the rear end of the second transmission arm is hinged to the second fixed base.

[0013] The hinge also includes: a first buffer device mounted on the first drive arm; and a second buffer device mounted on the front end of the second drive arm.

[0014] The first buffer device and the second buffer device are configured to switch between a first state and a second state according to the opening angle of the door, wherein when the opening angle of the door is less than a preset angle, the first buffer device and the second buffer device are in the second state.

[0015] When the first buffer device and the second buffer device are in the first state, the first buffer device and the second buffer device are separated or only in contact;

[0016] When the first buffer device and the second buffer device are in the second state, the first buffer device abuts against the second buffer device and applies a force to the second buffer device, so that the second fixed seat moves toward the first fixed seat;

[0017] The hinge also includes a limiting component, which includes a first limiting part and a second limiting part. The first limiting part is disposed on the first buffer device, and the second limiting part is disposed on the first transmission arm. The first limiting part and the second limiting part can abut and separate, and are used to limit the maximum distance between the second end of the first buffer device and the first end of the buffer device when the first limiting part and the second limiting part abut.

[0018] The first transmission arm has a receiving cavity, and a limiting assembly and a first buffer device are installed in the receiving cavity.

[0019] In this solution, the first and second buffer devices can provide a certain force to close the door when the opening angle of the door is less than the preset angle, thus assisting the door in achieving the function of automatically closing the door. When the first and second limiting parts abut against each other, the first buffer device can be prevented from being excessively relaxed outward. As the first limiting part extends along with the first buffer device, it abuts against the second limiting part to prevent the first buffer device from being excessively extended. This method of using the abutment of the first and second limiting parts to prevent the first buffer device from being excessively relaxed outward is beneficial to avoiding excessive wear between components. Meanwhile, by limiting the maximum distance between the second end of the first buffer device and the first end of the buffer device, it is also beneficial to reliably achieve the engagement of the first and second buffer devices within a limited stroke range when the first and second buffer devices need to engage during the closing process. In addition, when the first and second buffer devices are in the first state, there is no force between the first and second buffer devices, and no force is generated to close the door, so as to facilitate opening the door. The limiting component and the first buffer device are installed in the receiving cavity, so that the limiting component and the first buffer device are less affected by external factors and are not easy to rust. Moreover, the first buffer device and the limiting component are located inside the first transmission arm. Compared with the prior art, the waist-shaped groove set on the first transmission arm for supporting and guiding the first buffer device is eliminated. Correspondingly, the friction between the first buffer device and the waist-shaped groove is avoided, which helps to ensure the performance.

[0020] Preferably, when the door is fully open, the first limiting part and the second limiting part abut against each other.

[0021] In this solution, when the door is fully open, the first limiting part and the second limiting part abut against each other, and the first buffer device will not extend outward to prevent the first buffer from being overly relaxed and extending the first transmission arm. Otherwise, it will be affected by external air and rust or be covered by dust. These external factors are important factors affecting friction.

[0022] Preferably, the second limiting part is disposed at the bottom of the first buffer device, so that the first buffer device can extend and retract in the horizontal direction; or, the second limiting part is disposed below the first buffer device, so that there is a gap between it and the first buffer device, so that the extension and retraction direction of the first buffer device is at an angle to the horizontal direction.

[0023] In this design, the second limiting part is located at the bottom of the first buffer device to prevent the first buffer device from falling off, and at the same time, it ensures that the first buffer device can only extend and retract horizontally, preventing the first buffer device from rotating arbitrarily and failing to engage with the second buffer device when needed.

[0024] Preferably, the first buffer device further includes an elastic component, which includes a spring mounting rod and a spring element. The spring element is sleeved on the spring mounting rod, the fixed end of the spring mounting rod is fixed on the first transmission arm, and the movable end of the spring mounting rod is equipped with a push rod.

[0025] In this design, a push rod is installed at the movable end of the spring mounting rod. This arrangement facilitates the operation of the first and second buffer devices. Furthermore, the elastic component facilitates the extension and retraction of the first buffer device, primarily through the extension and retraction of the push rod.

[0026] Preferably, the first limiting part is a protrusion at the bottom of the push rod, and the second limiting part is a fixing pin. The fixing pin is located at the bottom of the push rod or below the push rod, and the two ends of the fixing pin are respectively fixed in the mounting holes on the opposite side walls of the first transmission arm.

[0027] In this design, the protrusion and the fixing pin work together more stably, making it less prone to slippage when the first and second limiting parts abut against each other, and the structure is simple. In addition, the fixing pin is located below the push rod, and the two ends of the fixing pin are respectively fixed in the mounting holes on the opposite side walls of the first transmission arm. On the one hand, the first limiting part is directly set on the structure of the elastic component itself, and the second limiting part is set in the space below the elastic component, which effectively utilizes the elastic component and the space below it, resulting in high space utilization. On the other hand, the above arrangement also allows the fixing pin to support the first buffer device, preventing the first buffer device from falling downwards during movement, so that the first buffer device can only move within a preset range under the action of the elastic component, which is conducive to ensuring the normal operation of the first and second buffer devices.

[0028] Preferably, the protrusion is located in the middle of the push rod and extends to both ends of the push rod along the setting direction of the fixing pin, and the length of the protrusion is more than half the length of the push rod in the extension direction of the protrusion.

[0029] In this design, the protrusion increases the contact area between the protrusion and the fixing pin, thereby improving the contact stability. In addition, the protrusion also helps to balance the push rod and prevent uneven force on the push rod from causing wobbling.

[0030] Preferably, the hinge further includes a support portion, which is disposed on the first transmission arm and located at the bottom or below the first buffer device;

[0031] The first buffer device is configured to move closer to or further away from the support during hinge operation, and the support is used to support the second end of the buffer device when the buffer device contacts the support.

[0032] In this solution, the aforementioned support portion is used to support the first buffer device when the elastic component moves, preventing the first buffer device from falling off, so that the first buffer device can only extend and retract horizontally under the action of the elastic component.

[0033] Preferably, the hinge further includes a limiting component, which includes a first limiting part and a second limiting part. The first limiting part is disposed on the first buffer device, and the second limiting part is disposed on the first transmission arm. The first limiting part and the second limiting part can abut and separate, and are used to limit the maximum distance between the second end of the first buffer device and the first end of the first buffer device when the first limiting part and the second limiting part abut.

[0034] When the door is fully open, the first limiting part and the second limiting part abut against each other.

[0035] In this design, the engagement of the first and second limiting parts prevents the first buffer device from excessively extending outwards. As the first buffer device extends, the first limiting part engages with the second limiting part to prevent overextension. This method of using the engagement of the first and second limiting parts to prevent excessive outward extension helps avoid excessive wear between components. Furthermore, by limiting the maximum distance between the second end and the first end of the first buffer device, it is also beneficial to reliably achieve engagement of the first and second buffer devices within a limited travel range during the closing process, when engagement is required.

[0036] Preferably, the end of the push rod away from the spring mounting rod has a rounded chamfer.

[0037] In this design, the above-mentioned arrangement prevents the sharp corners on the push rod from scratching the fixing pin and affecting friction during the installation of the elastic component.

[0038] The first drive arm is made of wear-resistant material, and / or the second drive arm, the first fixed seat, and the second fixed seat are made of wear-resistant material.

[0039] In this solution, the first transmission arm is made of wear-resistant material to enhance wear resistance and prevent it from being easily damaged when interacting with the fixing pin. The second transmission arm, the first fixing seat, and the second fixing seat are also made of wear-resistant material to enhance wear resistance.

[0040] This utility model also provides a refrigerator, which includes a cabinet, a door, and the aforementioned hinge.

[0041] The positive and progressive effects of this utility model are as follows: In this application, the first and second buffer devices can provide a certain closing force when the opening angle of the door is less than a preset angle, assisting the door in achieving the function of automatic closing; when the first and second limiting parts abut against each other, the first buffer device can be prevented from excessively relaxing outward. As the first limiting part extends along with the first buffer device, it abuts against the second limiting part to prevent the first buffer device from over-extending. This method of using the abutting of the first and second limiting parts to prevent the first buffer device from excessively relaxing outward helps to avoid excessive wear between components. At the same time, by limiting the maximum distance between the second end of the first buffer device and the first end of the buffer device, it is also beneficial to reliably achieve the abutting of the first and second buffer devices within a limited stroke range when the abutting of the first and second buffer devices is required during the closing process; in addition, when the first and second buffer devices are in the first state, there is no force between the first and second buffer devices, and no force is generated to close the door, making it convenient to open the door; the limiting components and the first buffer device are installed in the receiving cavity, making the limiting components and the first buffer device less affected by external factors and less prone to rust. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural diagram of the hinge of a refrigerator door when closed, according to an embodiment of the present invention.

[0043] Figure 2 for Figure 1 A three-dimensional structural diagram showing the positional relationship between the first and second buffer devices of the central hinge.

[0044] Figure 3 for Figure 1 Another three-dimensional structural diagram showing the positional relationship between the first and second buffer devices of the central hinge.

[0045] Figure 4 This is a three-dimensional structural diagram of the hinge when the door of a refrigerator is opened to a certain angle according to an embodiment of the present invention.

[0046] Figure 5 for Figure 4 A three-dimensional structural diagram showing the positional relationship between the first and second buffer devices of the central hinge.

[0047] Figure 6 This is a three-dimensional structural diagram of the hinge when the door of a refrigerator is fully opened according to an embodiment of the present invention.

[0048] Figure 7 for Figure 6A three-dimensional structural diagram showing the positional relationship between the first and second buffer devices of the central hinge.

[0049] Figure 8 for Figure 6 Another three-dimensional structural diagram showing the positional relationship between the first and second buffer devices of the central hinge.

[0050] Figure 9 This is a three-dimensional structural diagram of the hinge when the door of a refrigerator is fully opened according to an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] Hinges 100

[0053] First transmission arm 1

[0054] First buffer device 11

[0055] First roller 12

[0056] First mounting shaft 13

[0057] Elastic component 14

[0058] Putter 141

[0059] Spring mounting rod 142

[0060] Spring component 143

[0061] Reception cavity 15

[0062] Protrusion 16

[0063] Fixed pin 17

[0064] Second transmission arm 2

[0065] Second buffer device 21

[0066] Second roller 22

[0067] Second mounting shaft 23

[0068] First fixed seat 3

[0069] Second fixing seat 4 Detailed Implementation

[0070] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0071] like Figure 1-9As shown, this embodiment provides a hinge 100 for opening and closing the door of a refrigerator. The hinge 100 includes: a first fixed seat 3 for mounting on the refrigerator body; a second fixed seat 4 for mounting on the door; and a transmission assembly hinged between the first fixed seat 3 and the second fixed seat 4. The transmission assembly includes a first transmission arm 1 and a second transmission arm 2. The front end of the first transmission arm 1 is hinged to the first fixed seat 3, and the rear end of the first transmission arm 1 is hinged to the front end of the second transmission arm 2. The rear end of the second transmission arm 2 is hinged to the second fixed seat 4. The hinge 100 also includes: a first buffer device 11 mounted on the first transmission arm 1; and a second buffer device 21 mounted on the front end of the second transmission arm 2. The first buffer device 11 and the second buffer device 21 are configured to switch between a first state and a second state according to the opening angle of the door. When the opening angle of the door is less than a preset angle, the first buffer device 11 and the second buffer device 21 are in the second state.

[0072] In this embodiment, the first buffer device 11 and the second buffer device 21 provide a certain force to close the door when the opening angle of the door is less than a preset angle, assisting the door in achieving the function of automatically closing the door. The first roller 12 and the second roller 22 are arranged so that when the first buffer device 11 and the second buffer device 21 are in the second state, the first buffer device 11 and the second buffer device 21 respectively contact the first roller 12 and the second roller 22. The contact area of ​​the first roller 12 and the second roller 22 is relatively large to prevent significant wear of the contact area due to long-term use, which would affect the function of the hinge 100 and improve the durability of the hinge 100. Moreover, the first buffer device 11 and the limiting component are located inside the first transmission arm 1. Compared with the prior art, the waist-shaped groove provided on the first transmission arm 1 for supporting and guiding the first buffer device 11 is eliminated. Correspondingly, friction between the first buffer device 11 and the waist-shaped groove is avoided, which is beneficial to ensuring the performance.

[0073] It should be noted that "fixed" in the first fixing seat 3 and the second fixing seat 4 refers to their fixed position relative to the object they are installed on. Specifically, the first fixing seat 3 is fixed relative to the refrigerator body, and the second fixing seat 4 is fixed relative to the refrigerator door. During hinge operation, since the refrigerator body is in a fixed position, the spatial position of the first fixing seat 3 remains fixed. However, because the door moves relative to the refrigerator body according to different opening and closing requirements, the spatial position of the second fixing seat 4 changes. It should also be noted that when the door opening angle is less than the preset angle, if the door is released, it will automatically close under the action of the first impact device 11 and the second buffer device 21. When the door opening angle is greater than the preset angle, the first roller 12 and the second roller 22 may be in contact or not in contact. In both cases, there is no force between the first roller 12 and the second roller 22. If the door is released at this time, the door will stop at the opening angle. The first buffer device 11 and the second buffer device 21 are not necessarily connected by the first roller 12 and the second roller 22. The first roller 12 and the second roller 22 can also be other components that can connect the first buffer device 11 and the second buffer device 21. In addition, it should be noted that the first buffer device 11 includes the first roller 12, and the second buffer device 21 includes the second roller 22. When the first buffer device 11 and the second buffer device 21 are in the first state, the first roller 12... 2. Separate from the second roller 22; When the first buffer device 11 and the second buffer device 21 are in the second state, the first roller 12 abuts against the second roller 22 and applies a force to the second roller 22, so that the second fixed seat 4 moves toward the first fixed seat 3. According to actual needs, when the first buffer device 11 and the second buffer device 21 are in the first state, the first roller 12 and the second roller 22 do not abut against each other. The first roller 12 and the second roller 22 can be separated or only in contact. There is no force between them, and no force is generated to close the door, so as to facilitate opening the door.

[0074] like Figure 1-9 As shown, the second buffer device 21 also includes a second mounting shaft 23, the second roller 22 is a hollow cylinder, the front end of the second transmission arm 2 has a second mounting part, the second mounting shaft 23 passes through the second roller 22, and the second mounting shaft 23 is mounted on the second mounting part.

[0075] In this embodiment, the second mounting shaft 23 passes through the second roller 22 and is mounted on the second mounting part. This arrangement allows the second roller 22 to rotate around the second mounting shaft 23. Furthermore, the fact that the second mounting shaft 23 passes through the second roller 22 results in a relatively large contact area between the second mounting shaft 23 and the second roller 22, making the rotation of the second roller 22 more stable. The contact between the second roller 22 and the first roller 12 is also more stable, further preventing the second roller 22 from using the same contact part to contact the first roller 12 for a long time, thus affecting its function.

[0076] It should be noted that mounting holes are provided on both sides of the front end of the second transmission arm 2, and the two ends of the second mounting shaft 23 are respectively installed in the aforementioned mounting holes. In addition, the second roller 22 and the first roller 12 can also be selected as spherical components or gear components that can rotate around the second mounting shaft 23 or the first mounting shaft 13.

[0077] like Figure 1-9 As shown, the first buffer device 11 also includes a first mounting shaft 13 and an elastic component 14. The first end of the elastic component 14 along the elastic deformation direction is fixed on the first transmission arm 1. The first roller 12 is a hollow cylinder. The first mounting shaft 13 passes through the first roller 12 and is mounted on the second end of the elastic component 14. The first transmission arm 1 has a receiving cavity 15, and the first buffer device 11 is installed in the receiving cavity 15.

[0078] In this embodiment, the elastic component 14 allows the first roller 12 to extend or retract under the action of the elastic component 14 to contact or separate from the second roller 22, facilitating the switching between the first and second states of the first buffer device 11 and the second buffer device 21 in this application. Furthermore, the first buffer device 11 is installed within the receiving cavity 15, meaning the contact portion, i.e., the friction portion, is also within the receiving cavity 15. The first mounting shaft 13 of the first buffer device 11 is located inside the first transmission arm 1. Compared to the prior art, the waist-shaped groove on the first transmission arm 1 used for supporting and guiding the first mounting shaft 13 is eliminated, thus avoiding friction between the first mounting shaft 13 and the waist-shaped groove, which helps ensure the effectiveness of use. Simultaneously, since the first buffer device 11 is entirely located inside the first transmission arm 1, the first roller 12 and the second roller 22 are less affected by external factors when in contact.

[0079] It should be noted that the first mounting shaft 13 does not contact the wall of the receiving cavity 15, and the extension length of the receiving cavity 15 is greater than the extension length of the first buffer device 11.

[0080] like Figure 1-9As shown, the elastic component 14 includes a spring mounting rod 142 and a spring member 143. The spring member 143 is sleeved on the spring mounting rod 142. The fixed end of the spring mounting rod 142 is fixed on the first transmission arm 1. A push rod 141 is mounted on the movable end of the spring mounting rod 142. The first mounting shaft 13 is connected to the end of the push rod 141 away from the movable end of the spring mounting rod 142.

[0081] In this embodiment, a push rod 141 is mounted on the movable end of the spring mounting rod 142, and a first mounting shaft 13 is connected to the end of the push rod 141 away from the movable end of the spring mounting rod 142. This arrangement facilitates the connection between the first roller 12 and the elastic component 14, and the connection area between the push rod 141 and the first mounting shaft 13 is larger and more stable. Furthermore, similar to the installation method of the second roller 22, the contact area between the first mounting shaft 13 and the first roller 12 is relatively large, the rotation of the first roller 12 is relatively stable, and the contact between the first roller 12 and the second roller 22 is also relatively stable. This further prevents the first roller 12 from contacting the second roller 22 with its limited contact area for a long time, thus affecting its function.

[0082] It should be noted that the aforementioned elastic component 14 can be other components that enable the first roller 12 to extend and retract.

[0083] like Figure 1-9 As shown, the hinge 100 also includes a limiting component, which includes a first limiting part and a second limiting part. The first limiting part is disposed on the first buffer device 11, and the second limiting part is disposed on the first transmission arm 1. The first limiting part and the second limiting part can abut and separate, and are used to limit the maximum distance between the second end of the elastic component 14 and the first end of the elastic component 14 when the first limiting part and the second limiting part abut. When the door is in the fully open state, the first limiting part and the second limiting part abut.

[0084] In this embodiment, when the first limiting part and the second limiting part abut against each other, the elastic component 14 in the first buffer device 11 is prevented from excessively relaxing outward, thus preventing the first roller 12 from extending out of the receiving cavity 15 of the first transmission arm 1. When the door is fully open, the first roller 12 and the second roller 22 do not contact each other, and the elastic component 14 is not subjected to the force of the second roller 22. At this time, the elastic component 14 extends outward, and the first limiting part abuts against the second limiting part as the elastic component 14 extends, thus preventing the elastic component 14 from overextending. At the same time, by limiting the maximum distance between the second end and the first end of the elastic component 14, it is also beneficial to reliably achieve the abutment of the first roller 12 and the second roller 22 within a limited stroke range when the first roller 12 and the second roller 22 need to abut against each other during the closing process.

[0085] It should be noted that when the door is closed, the first and second limiting parts do not abut against each other.

[0086] like Figure 1-9 As shown, the elastic component 14 includes a spring mounting rod 142 and a spring member 143. The spring member 143 is sleeved on the spring mounting rod 142. The fixed end of the spring mounting rod 142 is fixed on the first transmission arm 1. A push rod 141 is mounted on the movable end of the spring mounting rod 142. The push rod 141 is connected to the movable end of the spring mounting rod 142. A first mounting shaft 13 is connected to one end of the push rod 141 away from the movable end of the spring mounting rod 142. The first limiting part is a protrusion 16 provided at the bottom of the push rod 141. The second limiting part is a fixing pin 17. The fixing pin 17 is provided below the push rod 141, and the two ends of the fixing pin 17 are respectively fixed in the mounting holes on the opposite side walls of the first transmission arm 1.

[0087] In this embodiment, the protrusion 16 and the fixing pin 17 cooperate more stably, making it less likely to slip when the first limiting part and the second limiting part abut against each other, and the structure is simple. In addition, the fixing pin 17 is located below the push rod 141, and the two ends of the fixing pin 17 are respectively fixed in the mounting holes on the opposite side walls of the first transmission arm 1. On the one hand, the first limiting part is directly set on the structure of the elastic component 14 itself, and the second limiting part is set in the space below the elastic component 14, which effectively utilizes the elastic component 14 and the space below it, resulting in high space utilization. On the other hand, the above arrangement also allows the fixing pin 17 to support the first buffer device 11, preventing the first buffer device 11 from falling downwards during movement, so that the first buffer device 11 can only move within a preset range under the action of the elastic component 14, which is beneficial to ensuring the normal operation of the first buffer device 11 and the second buffer device 21. As a preferred arrangement, if the fixing pin is directly supported on the bottom surface of the push rod 141, the first buffer device 11 can only move horizontally under the action of the elastic component 14, that is, the spring 143 can only move horizontally to extend and retract.

[0088] It should be noted that the cooperation between the protrusion 16 and the fixing pin 17 prevents the push rod 141 from extending further, thereby compressing the spring 143; in addition, the protrusion 16 has a raised step; furthermore, when the fixing pin 17 supports the push rod 141, it rubs against the push rod 141 on one side, and there is no pressure between the two, resulting in low friction.

[0089] like Figure 1-9 As shown, the hinge 100 also includes a support portion disposed on the first transmission arm 1 and located below the elastic component 14; the elastic component 14 is configured to move closer to or further away from the support portion during the operation of the hinge 100, and the support portion is used to support the second end of the elastic component 14 when the elastic component 14 contacts the support portion.

[0090] In this embodiment, the support portion is used to support the first buffer device 11 when the elastic component 14 moves, to prevent the first buffer device 11 from falling, so that the first buffer device 11 can only move horizontally under the action of the elastic component 14.

[0091] It should be noted that the support part can be the aforementioned fixing pin 17, and the support part can also be set in the same way as the fixing pin 17.

[0092] In other alternative embodiments, the support portion may also be other structures that can perform the aforementioned support function, which are added on top of the limiting component.

[0093] like Figure 1-9 As shown, the hinge 100 also includes a limiting component, which includes a first limiting part and a second limiting part. The first limiting part is disposed on the first buffer device 11, and the second limiting part is disposed on the first transmission arm 1. The first limiting part and the second limiting part can abut and separate, and are used to limit the maximum distance between the second end of the elastic component 14 and the first end of the elastic component 14 when the first limiting part and the second limiting part abut. When the door is in the fully open state, the first limiting part and the second limiting part abut.

[0094] In this embodiment, as described above, when the first limiting part and the second limiting part abut against each other, it can prevent the elastic component 14 in the first buffer device 11 from excessively relaxing outward, thereby preventing the first roller 12 from extending out of the receiving cavity 15 of the first transmission arm 1. When the door is in the fully open state, the first roller 12 and the second roller 22 do not contact each other, and the elastic component 14 is not subjected to the force of the second roller 22. At this time, the elastic component 14 extends outward, and the first limiting part abuts against the second limiting part as the elastic component 14 extends, thereby preventing the elastic component 14 from overextending. At the same time, by limiting the maximum distance between the second end and the first end of the elastic component 14, it is also beneficial to reliably achieve the abutment of the first roller 12 and the second roller 22 within a limited stroke range when the first roller 12 and the second roller 22 need to abut against each other during the closing process.

[0095] like Figure 1-9 As shown, the diameter of the first roller 12 is larger than the diameter of the second roller 22.

[0096] The above configuration makes the force on the second roller 22 more concentrated and uniform when the first roller 12 applies a force to the second roller 22, the second roller 22 rotates faster and wears less, and the contact area between the first roller 12 and the second roller 22 is large, so that the first roller 12 is less worn. In addition, the reaction force on the first roller 12 is not likely to damage the first roller 12.

[0097] It should be noted that the diameter of the first mounting shaft 13 is larger than the diameter of the second mounting shaft 23.

[0098] This utility model also provides a refrigerator, which includes a cabinet, a door, and the aforementioned hinge 100.

[0099] The opening process of the refrigerator door in this embodiment is described in detail below:

[0100] When the opening angle of the door is less than a preset angle, for example, this preset angle can be set to 30°, the first roller 12 abuts against the second roller 22 and applies a force to the second roller 22. At this time, the reaction force received by the first roller 12 acts on the elastic component 14, so that the elastic component 14 provides a certain force to close the door, so as to assist the door to close automatically, and at this time the protrusion 16 has not yet abutted against the fixing pin 17. Figure 5 As shown.

[0101] As the door opens from a greater than preset angle to its maximum angle, the first roller 12 and the second roller 22 move from continued contact to separation. During this process, no force is generated between the first roller 12 and the second roller 22, and the elastic component 14 cannot provide the force to close the door. Furthermore, during this process, the protrusion 16 moves towards the fixing pin 17 until it abuts against the fixing pin 17, achieving a fully open state. Figure 8 As shown.

[0102] Furthermore, in conjunction with the accompanying drawings, in this embodiment, during the process of the door opening from closing, such as... Figure 1 and Figure 2 As shown, initially, the first roller 12 is located to the left of the second roller 22; as the door opening angle increases, the first roller 12 and the second roller 22 move closer together, and when the first roller 12 and the second roller 22 abut together, as... Figure 4 and Figure 5 As shown, the first roller 12 can apply a force to the second roller 22, causing the second drive arm 2 to retract toward the second fixed seat 4, and the second fixed seat 4 to move toward the first fixed seat 3; as the position of the second drive arm 2 relative to the second fixed seat 4 is adjusted, the first roller 12 and the second roller 22 move away from each other, with the first roller 12 located to the right of the second roller 22, and the second fixed seat 4 gradually moves closer to the first fixed seat 3 until the door is fully opened, and the fixing pin 17 abuts against the protrusion 16, as shown. Figures 6 to 8 As shown.

[0103] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0104] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A hinge for opening and closing a refrigerator door, the hinge comprising: A first fixing bracket is used for mounting on the refrigerator body; The second fixing seat is used for installation on the door body; A transmission assembly, hinged between a first fixed base and a second fixed base, includes a first transmission arm and a second transmission arm. The front end of the first transmission arm is hinged to the first fixed base, and the rear end of the first transmission arm is hinged to the front end of the second transmission arm. The rear end of the second transmission arm is hinged to the second fixed base. The transmission assembly is characterized in that... The hinge further includes: a first buffer device, which is mounted on the first transmission arm; and a second buffer device, which is mounted on the front end of the second transmission arm. The first buffer device and the second buffer device are configured to switch between a first state and a second state according to the opening angle of the door, wherein when the opening angle of the door is less than a preset angle, the first buffer device and the second buffer device are in the second state. When the first buffer device and the second buffer device are in the first state, the first buffer device and the second buffer device are separated or only in contact; When the first buffer device and the second buffer device are in the second state, the first buffer device abuts against the second buffer device and applies a force to the second buffer device, so that the second fixed seat moves toward the first fixed seat; The hinge also includes a limiting component, which includes a first limiting part and a second limiting part. The first limiting part is disposed on the first buffer device, and the second limiting part is disposed on the first transmission arm. The first limiting part and the second limiting part can abut and separate, and are used to limit the maximum distance between the second end of the first buffer device and the first end of the buffer device when the first limiting part and the second limiting part abut. The first transmission arm has a receiving cavity, and the limiting component and the first buffer device are installed in the receiving cavity.

2. The hinge as described in claim 1, characterized in that, When the door is fully open, the first limiting part and the second limiting part abut against each other.

3. The hinge as described in claim 1, characterized in that, The first buffer device is retractable; The second limiting part is disposed at the bottom of the first buffer device, so that the extension and retraction direction of the first buffer device is horizontal. Alternatively, the second limiting part is disposed below the first buffer device, so that there is a gap between it and the first buffer device, so that there is an angle between the extension and retraction direction and the horizontal direction of the first buffer device.

4. The hinge as described in claim 3, characterized in that, The first buffer device further includes an elastic component, which includes a spring mounting rod and a spring element. The spring element is sleeved on the spring mounting rod, the fixed end of the spring mounting rod is fixed to the first transmission arm, and the movable end of the spring mounting rod is equipped with a push rod.

5. The hinge as described in claim 4, characterized in that, The first limiting part is a protrusion at the bottom of the push rod, and the second limiting part is a fixing pin. The fixing pin is located at the bottom of the push rod or below the push rod, and the two ends of the fixing pin are respectively fixed in the mounting holes on the opposite side walls of the first transmission arm.

6. The hinge as described in claim 5, characterized in that, The protrusion is located in the middle of the push rod and extends to both ends of the push rod along the setting direction of the fixing pin. The length of the protrusion is more than half the length of the push rod in the extension direction of the protrusion.

7. The hinge as claimed in claim 1, characterized in that, The hinge also includes a support portion, which is disposed on the first transmission arm and located at the bottom or below the first buffer device; The first buffer device is configured to move closer to or further away from the support during the operation of the hinge, and the support is used to support a second end of the buffer device when the buffer device comes into contact with the support.

8. The hinge as described in claim 5, characterized in that, The end of the push rod away from the spring mounting rod has a rounded chamfer.

9. The hinge as described in claim 5, characterized in that, The first transmission arm is made of a wear-resistant material, and / or the second transmission arm, the first fixed seat, and the second fixed seat are made of wear-resistant materials.

10. A refrigerator, comprising a cabinet and a door, characterized in that, The refrigerator also includes a hinge as described in any one of claims 1-9.

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