Household appliance with door hinge structure and oiling method of door hinge structure of household appliance

Abstract

The invention relates to a household appliance with a door hinge structure and an oiling method of the door hinge structure, the household appliance comprises a box body with a front side opening and a door body used for opening and closing the front side opening, and the left side and the right side of the lower end of the door body are rotationally connected with the box body through the door hinge structure respectively. Each door hinge structure comprises a connecting piece and a base rotationally connected with the connecting piece, one end of each connecting piece is fixed to the door body, the other end of each connecting piece is provided with a sliding block, each base is fixed to the box body and provided with a sliding face, and in the door opening and closing process, the connecting pieces rotate relative to the corresponding bases correspondingly; the sliding block on each connecting piece slides along the sliding surface of the corresponding base; and the oil adding device is used for adding lubricating oil to the contact part of each sliding block and the corresponding sliding surface. Compared with the prior art, the sliding smoothness of the sliding block relative to the sliding face can be guaranteed, door opening and closing noise caused by dry friction due to long-term use is avoided, and the use experience of a user is improved.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a household appliance with a door hinge structure and a lubricating oil replenishing method for the door hinge structure. Background Art

[0002] The front side of the box of household appliances such as steamers, ovens, and built-in dishwashers is open, and a door is installed through a hinge structure to open and close the box opening. For example, the Chinese invention patent "An oven hinge structure" with application number CN201710416901.2 (publication number CN108005511A) and the Chinese utility model patent "Door hinge assembly and dishwasher" with patent number ZL202322998868.2 (authorization announcement number CN221242792U). For another example, the Chinese utility model patent with patent number ZL202322307324.7 (authorization announcement number CN220344365U) discloses a household appliance, comprising a housing, a door body and a door hinge assembly, wherein the lower area of ​​the wall panel in front of the base has a refuge chamber located below the chamber and recessed rearward for a skirting board to be placed therein, the first connecting rod is located above the refuge chamber, the rear area of ​​the first connecting rod after its rotation point extends along the wall thickness direction of the door body and is a rod body arranged crosswise with the second connecting rod, and when the door is in a closed state, the second connecting rod is located below the rod body and behind the refuge chamber.

[0003] To ensure smooth opening and closing of the door, the hinge structure is coated with grease once during assembly. However, after long-term use, the grease will dry up and affect its lubrication effect, thus affecting the smoothness of the hinge. In addition, when opening and closing the door, the grease may be squeezed to one side, resulting in a lack of grease in the rotating sliding part of the hinge structure, resulting in dry friction, causing friction noise, aggravating the wear of the hinge, and affecting the user experience. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a household appliance with a door hinge structure which can avoid affecting the smoothness of the hinge due to long-term use in view of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a method for replenishing lubricating oil of the door hinge structure of the above-mentioned household appliance in view of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a household appliance with a door hinge structure, comprising a box body with a front opening and a door body for opening and closing the front opening, and the left and right sides of the lower end of the door body are rotatably connected to the box body through the door hinge structure, characterized in that:

[0007] Each of the door hinge structures comprises a connecting member and a base rotatably connected to the connecting member, wherein one end of the connecting member is fixed to the door body and the other end is provided with a sliding block, and the base is fixed to the box body and has a sliding surface.

[0008] During the door opening and closing process, each connecting member rotates relative to the corresponding base, and the sliding block on each connecting member slides along the sliding surface of the corresponding base;

[0009] The utility model also comprises an oiling device for adding lubricating oil to the contact point between each sliding block and the corresponding sliding surface.

[0010] Furthermore, in order to facilitate the addition of lubricating oil inside each door hinge structure, the refueling device corresponds to the door hinge structure one by one, and each refueling device is located on the corresponding door hinge structure. In the refueling state, the lubricating oil in each refueling device drips into the corresponding door hinge structure from top to bottom.

[0011] Furthermore, in the refueling state, the oil outlets of each refueling device are respectively opposite to the corresponding sliding blocks in the upper and lower directions. In this way, when refueling, oil droplets can drip onto each sliding block. Since each sliding block slides along the corresponding sliding surface when opening and closing the door, the lubricating oil is dripped onto each sliding block, and as each sliding block slides, the lubricating oil can be effectively coated on the contact between each sliding block and the corresponding sliding surface.

[0012] Furthermore, each of the sliding surfaces extends up and down, and during the door opening and closing process, each sliding block slides back and forth along the length direction of the corresponding sliding surface.

[0013] Furthermore, in the refueling state, each of the sliding blocks is located at the upper end of the corresponding sliding surface and the top surface of each sliding block is tilted downward along the setting direction of the sliding surface, and the oil outlet of each refueling device is directly opposite to the upper end of the top surface of the corresponding sliding block. In this way, the dripped lubricating oil can flow downward along the top surface of each sliding block, and can be spread and coated on the contact between each sliding block and the corresponding sliding surface more quickly and evenly as the sliding block slides, thereby better ensuring the refueling effect.

[0014] Furthermore, each of the door hinge structures is vertically arranged on the left and right sides of the box body along the front-back direction, and the connecting member and the base of each door hinge structure are both plates, which are arranged at intervals on the left and right sides and are rotatably connected by a rotating shaft extending on the left and right sides.

[0015] In addition, the lower ends of the connectors in each door hinge structure are fixed to the door body, and the above-mentioned sliding blocks are installed on the inner side surfaces of the upper ends, and each sliding block is sandwiched between the corresponding connector and the base, and each sliding surface is located on the inner side surface of the corresponding base. On the one hand, the door body and the box body can be connected in rotation and the reliability of the connection can be ensured, and on the other hand, it is convenient for the oiling device to drip lubricating oil to the contact between each sliding block and the corresponding sliding surface.

[0016] Furthermore, the outer surface of each sliding block is smooth, so that each sliding block can slide more smoothly along the corresponding sliding surface under the lubrication of the lubricating oil.

[0017] The hinges are respectively installed in the installation holes of the corresponding connecting pieces through the installation shafts extending to the left and right, and are respectively positioned on the corresponding connecting pieces through the positioning components. Compared with the fixed installation method, the above installation method can avoid the influence of the internal stress generated during the sliding process of each sliding block on the structural stability of the connecting piece, which is conducive to extending the service life of each door hinge structure.

[0018] Furthermore, each of the refueling devices comprises a shell extending up and down, the shell is hollow to form an oil storage cavity, and the bottom of the shell is provided with an oil outlet communicating with the oil storage cavity, and also comprises a control component for controlling the opening and closing of the oil outlet. The refueling device in the present invention has a simple structure, and refueling of each door hinge structure can be achieved by opening the oil outlet through the control component.

[0019] Furthermore, each of the control components includes:

[0020] A sealing ball, located in the oil storage cavity and used to seal the oil outlet;

[0021] A driving device, used for driving the sealing ball to move up and down to open and close the oil outlet;

[0022] as well as

[0023] The solenoid valve is connected to the electrical signal of the controller of the household appliance and is used to control the opening and closing of the above-mentioned drive device. In this way, the angle sensor detects the door opening angle and the number of door openings and closings, and transmits the detected information to the controller, which controls the solenoid valve to realize the opening and closing control of the drive device, thereby realizing the driving of the sealing ball and realizing the opening and closing control of the oil outlet.

[0024] Furthermore, an angle sensor for detecting the door opening angle and the number of times the door is opened and closed is included, and the angle sensor is connected to the controller of the household appliance by electrical signals, so that the door opening angle and the number of times the door is opened and closed can be monitored in real time, and the refueling action can be controlled according to the size of the door opening angle, and the refueling amount can be controlled by the number of times the door is opened and closed.

[0025] Furthermore, the outer shell of each refueling device includes an upper shell having a cylindrical shape and a lower shell having an inverted conical shape, the radii of the two are equal, and the bottom of the upper shell and the top of the lower shell are both open and connected along the circumferential direction, and the bottom of the lower shell is open to form the above-mentioned oil outlet.

[0026] The driving device is a push rod motor, which is mounted on the outer top surface of the upper shell, the solenoid valve is mounted on the driving device, and the push rod of the driving device extends along the axial direction of the shell and extends into the shell, and the sealing ball is mounted on the bottom end of the push rod. Thus, the internal structure of the refueling device can be more concise, and the driving device and the solenoid valve can be stably arranged, and the sealing ball can better open and close the oil outlet through the design of the specific structure of the shell.

[0027] Furthermore, the lower end of each lower shell is uniformly axially contracted inward to form a conical oil outlet nozzle, and the above-mentioned oil outlet is located at the bottom of the oil outlet nozzle. When each sealing ball seals the upper port of the corresponding oil outlet nozzle, each oil outlet is closed. This is conducive to more precise control of the oil output and enables the lubricating oil to drip out of the oil outlet more smoothly. Furthermore, each control component also includes a truncated cone-shaped mounting cover, and each mounting cover is arranged in the outer shell with the central axis of the corresponding outer shell as the center, and the upper end of each mounting cover is circumferentially fixed to the lower end of the corresponding push rod, and the aperture of the lower port matches the radius of the corresponding sealing ball, and each sealing ball is clamped and fixed in the lower port of the corresponding mounting cover.

[0028] When each oil outlet is closed, the part of each sealing ball exposed from the corresponding mounting cover is respectively clamped at the junction of the corresponding oil outlet and the upper part of the lower shell body, and the lower end of each mounting cover is respectively against the inner surface of the lower shell body above the corresponding oil outlet in the circumferential direction. On the one hand, the sealing ball can be stably mounted on the push rod, and on the other hand, the double-layer seal between the sealing ball and the lower end of the mounting cover can better seal the oil outlet to prevent oil droplets from seeping out of the oil outlet when not filling oil, and on the other hand, the relative sliding between the lower end of the mounting cover and the inner surface of the upper shell body can make the sealing ball move up and down more smoothly.

[0029] The technical solution adopted to further solve the above-mentioned second technical problem is: a method for refueling the door hinge structure of a household appliance with a door hinge structure as described above, characterized in that the amount of refueling of each door hinge structure is positively correlated with the wear intensity of the sliding blocks and sliding surfaces of each door hinge structure during the door opening and closing process.

[0030] Furthermore, the above-mentioned door hinge structure oiling method comprises the following steps: firstly, the door body is opened to the maximum angle, then oil is added to each door hinge structure through the oiling device, and after the oiling is completed, the door body is closed. In this way, after oiling, as the sliding blocks in each door hinge structure slide relative to the sliding surface, the added lubricating oil can be evenly distributed.

[0031] Furthermore, the wear intensity of the sliding block and the sliding surface of each door hinge structure is related to the number of door opening and closing (one door opening plus one door closing is counted as one time), and includes a first wear stage, a second wear stage and a third wear stage in sequence according to the number of door opening and closing, wherein the wear intensity of the first wear stage and the third wear stage is respectively greater than the wear intensity of the second wear stage. Therefore, the wear intensity can be objectively judged by the number of door opening and closing.

[0032] Furthermore, the amount of oil added to each door hinge structure is recorded as y, and the number of times the door is opened and closed is x, then:

[0033] , where 0<x<20000 is the above-mentioned first wear stage, 20000≤x≤31500 is the above-mentioned second wear stage, and 31500>x is the above-mentioned third wear stage. According to the wear theory, the wear of each door hinge structure in the present invention is divided into the above-mentioned three stages: the first wear stage (running-in stage), the second wear stage (stable wear stage) and the third wear stage (severe wear stage), wherein the wear intensity of the first wear stage and the third wear stage is relatively large, while the wear intensity of the second wear stage is relatively small. According to the above analysis, the present invention quantitatively designs the above formula for the relationship between the number of door opening and closing times and the amount of oil added, so that the amount of oil added can be controlled according to different wear stages (i.e., different wear intensities), which can not only better ensure the lubrication effect, but also effectively avoid the problems caused by excessive oil addition.

[0034] Compared with the prior art, the advantages of the present invention are: a refueling device is provided in the present invention, through which lubricating oil is added to the contact point between the sliding block and the sliding surface of each door hinge structure, thereby ensuring the smoothness of the sliding block relative to the sliding surface, avoiding the door opening and closing noise caused by dry friction due to long-term use, and improving the user experience.

[0035] Furthermore, controlling the amount of oil added according to the amount of wear (extent of wear) cannot effectively ensure the smoothness of the hinge. For example, if the real-time wear is detected to be small, adding a small amount of lubricant will increase friction due to the low lubricity, thereby aggravating the wear of the hinge. If the real-time wear is large, even if a large amount of lubricant is added, the extent of hinge wear cannot be controlled. In addition, adding too much oil will not only fail to improve the lubrication effect, but also cause a waste of lubricant, and even cause too much lubricant to seep out of the door hinge structure, seriously affecting the user experience.

[0036] In view of the above problems, the amount of lubricating oil added in the present invention is positively correlated with the wear intensity of the hinge, that is, when the wear intensity is small, the amount of lubricating oil is small, and when the wear intensity is large, the amount of lubricating oil is large. The wear intensity is used to predict the wear amount, and the predicted wear amount is used to control the amount of lubricating oil, so that the smoothness of the door hinge structure can be better guaranteed, and the amount of lubricating oil can be better controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a household appliance in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 A magnified view of part A;

[0039] Figure 3 It is a structural schematic diagram of a door hinge structure in an embodiment of the present invention;

[0040] Figure 4 It is a structural exploded view of the door hinge structure in an embodiment of the present invention;

[0041] Figure 5 for Figure 4 A schematic diagram of the structure in another direction;

[0042] Figure 6 It is a partial structural exploded view of the connecting member in an embodiment of the present invention;

[0043] Figure 7 It is a structural schematic diagram of a refueling device in an embodiment of the present invention;

[0044] Figure 8 is a cross-sectional view of a refueling device in an embodiment of the present invention;

[0045] Fig. 9 It is a partial structural exploded view of the door body in the embodiment of the present invention;

[0046] Fig.10 Schematic diagram of the relationship between the amount of refueling and the number of door openings and closings in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the accompanying drawings.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0049] like Figures 1 to 9 As shown, a household appliance with a door hinge structure includes a box body 1 with a front opening and a door body 6 for opening and closing the front opening, and the left and right sides of the lower end of the door body 6 are rotatably connected to the box body 1 through door hinge structures 3. Each of the above-mentioned door hinge structures 3 includes a connecting member 31 and a base 32 rotatably connected to the connecting member 31. Among them, one end of the connecting member 31 is fixed on the door body 6 and the other end is provided with a sliding block 33, and the base 32 is fixed on the box body 1 and has a sliding surface 320. During the process of opening and closing the door, each connecting member 31 rotates relative to the corresponding base 32, and the sliding block 33 on each connecting member 31 slides along the sliding surface 320 of the corresponding base 32; it also includes a refueling device 4 for adding lubricating oil to the contact between each sliding block 33 and the corresponding sliding surface 320. In this embodiment, the household appliance is specifically a cleaning machine (for example, a dishwasher, etc.), and the interior of the box body 1 is provided with an inner tank 2 with a front opening, the inner cavity of the inner tank 2 forms a cleaning cavity, and the door body 6 is used for opening and closing the inner tank 2 and the box body 1 at the same time.

[0050] As can be seen from the above, a refueling device 4 is provided in the present invention, through which lubricating oil is added to the contact point between the sliding block 33 and the sliding surface 320 of each door hinge structure 3, thereby ensuring the smoothness of the sliding block 33 relative to the sliding surface 320, avoiding the door opening and closing noise caused by dry friction due to long-term use, and improving the user experience.

[0051] Preferably, in order to facilitate the addition of lubricating oil to the inside of each door hinge structure 3, the above-mentioned refueling device 4 corresponds to the door hinge structure 3 one by one, and each refueling device 4 is respectively located on the corresponding door hinge structure 3. In the refueling state, the lubricating oil in each refueling device 4 is respectively dripped into the corresponding door hinge structure 3 from top to bottom. Further preferably, in the refueling state, the oil outlet 41 of each of the above-mentioned refueling devices 4 is respectively opposite to the corresponding sliding block 33 up and down. In this way, when refueling, the oil droplets can drip onto each sliding block 33. Since each sliding block 33 slides along the corresponding sliding surface 320 when opening and closing the door, the lubricating oil is dripped onto each sliding block 33. As each sliding block 33 slides, the lubricating oil can be effectively coated on the contact between each sliding block 33 and the corresponding sliding surface 320. Further preferably, each of the above-mentioned sliding surfaces 320 extends up and down. During the process of opening and closing the door, each sliding block 33 slides back and forth along the length direction of the corresponding sliding surface 320. Furthermore, in the refueling state, each of the above-mentioned sliding blocks 33 is located at the upper end of the corresponding sliding surface 320 and the top surface of each sliding block 33 is tilted downward along the setting direction of the sliding surface 320, and the oil outlet 41 of each refueling device 4 is vertically opposite to the upper end of the top surface of the corresponding sliding block 33, such as Figure 2 In this way, the dripped lubricating oil can flow downward along the top surface of each sliding block 33, and can be spread and coated on the contact point between each sliding block 33 and the corresponding sliding surface 320 more quickly and evenly as the sliding block 33 slides, thereby ensuring a better oiling effect.

[0052] Specifically, in this embodiment, each of the above-mentioned door hinge structures 3 is vertically arranged on the left and right sides of the inner container 2 along the front-to-back direction (such as Figure 1 As shown), and are all located in the box 1. The connecting member 31 and the base 32 of each door hinge structure 3 are both plates, which are arranged at intervals on the left and right and are rotatably connected by a rotating shaft 34 extending on the left and right. In addition, the lower end of the connecting member 31 in each door hinge structure 3 is fixed to the door body 6, and the above-mentioned sliding block 33 is installed on the inner side surface of the upper end, and each sliding block 33 is sandwiched between the corresponding connecting member 31 and the base 32, and each sliding surface 320 is located on the inner side surface of the corresponding base 32, as shown in FIG. Figure 2 and Figure 3 On the one hand, the door body 6 can be connected to the box body 1 in rotation and the reliability of the connection can be ensured. On the other hand, the oiling device 4 can drip the lubricating oil to the contact point between each sliding block 33 and the corresponding sliding surface 320.

[0053] Preferably, the outer surface of each of the above-mentioned sliding blocks 33 is smooth, so that each sliding block 33 can slide more smoothly along the corresponding sliding surface 320 under the lubrication of lubricating oil. In addition, each sliding block 33 is installed in the installation hole 310 of the corresponding connecting member 31 through the installation shaft 36 extending left and right, and is positioned on the corresponding connecting member 31 through the positioning assembly 35. Compared with the fixed installation method, the above-mentioned installation method can avoid the influence of the internal stress generated during the sliding process of each sliding block 33 on the structural stability of the connecting member 31, which is conducive to extending the service life of each door hinge structure 3.

[0054] like Figure 7 and Figure 8 As shown, each of the above-mentioned refueling devices 4 includes a shell 40 extending up and down, the shell 40 is hollow to form an oil storage chamber 400, and the bottom of the shell 40 is provided with an oil outlet 41 communicating with the oil storage chamber 400, and also includes a control component for controlling the opening and closing of the oil outlet 41. The refueling device 4 in the present invention has a simple structure, and refueling of each door hinge structure 3 can be achieved by opening the oil outlet 41 through the control component. In this embodiment, a mounting seat 45 is fixed on the outer surface of the shell 40 of each refueling device 4, and is fixed to the left and right outer surfaces of the inner tank 2 through the mounting seat 45.

[0055] Specifically, Figure 8 As shown, each of the above-mentioned control components includes a sealing ball 42, a driving device 43 and a solenoid valve 44. Among them, the sealing ball 42 is located in the oil storage chamber 400 and is used to close the above-mentioned oil outlet 41; the driving device 43 is used to drive the above-mentioned sealing ball 42 to move up and down to open and close the oil outlet 41; and the solenoid valve 44 is connected to the controller of the household appliance (not shown) by electrical signals and is used to control the opening and closing of the above-mentioned driving device 43. In this way, the controller controls the solenoid valve 44 to realize the opening and closing control of the driving device 43, thereby realizing the driving of the sealing ball 42 and realizing the opening and closing control of the oil outlet 41. Preferably, it also includes an angle sensor 5 for detecting the door opening angle and the number of door opening and closing times, and the angle sensor 5 is connected to the controller of the household appliance by electrical signals. Thereby, the door opening angle and the number of door opening and closing times can be monitored in real time, and the refueling action can be controlled according to the size of the door opening angle (as described below), and the refueling amount can be controlled by the number of door opening and closing times (as described below). In this embodiment, the above-mentioned angle sensor 5 is installed in the above-mentioned door body 6, as shown in FIG. Fig. 9 shown.

[0056] Specifically, Figure 8As shown, the housing 40 of each of the above-mentioned refueling devices 4 includes an upper housing 401 with a cylindrical shape and a lower housing 402 with an inverted conical shape, and the radii of the two are equal, and the bottom of the upper housing 401 and the top of the lower housing 402 are both open, and the two are connected along the circumferential direction, and the bottom of the lower housing 402 is open to form the above-mentioned oil outlet 41. The above-mentioned driving device 43 is a push rod motor, and the driving device 43 is installed on the outer top surface of the upper housing 401, and the above-mentioned solenoid valve 44 is installed on the driving device 43, and the push rod 431 of the driving device 43 extends along the axial direction of the housing 40 and extends into the housing 40, and the above-mentioned sealing ball 42 is installed at the bottom end of the push rod 431. Thereby, the internal structure of the refueling device 4 can be made simpler, and the driving device 43 and the solenoid valve 44 can be stably arranged, and the sealing ball 42 can better open and close the oil outlet 41 through the design of the specific structure of the housing 40. Furthermore, the lower end of each lower shell 402 is uniformly contracted inwardly along the axial direction to form a conical oil outlet 403, and the oil outlet 41 is located at the bottom of the oil outlet 403. When each sealing ball 42 seals the upper end of the corresponding oil outlet 403, each oil outlet 41 is closed. This is conducive to more accurate control of the oil output and enables the lubricating oil to drip out of the oil outlet 41 more smoothly. In order to facilitate the oil filling of the oil filling device 4, an oil filling port 404 is provided on the top wall of the shell 40.

[0057] Preferably, each of the above control components further includes a truncated cone-shaped mounting cover 432, each mounting cover 432 is respectively arranged in the housing 40 with the central axis of the corresponding housing 40 as the center, and the upper end of each mounting cover 432 is circumferentially fixed to the lower end of the corresponding push rod 431, and the aperture of the lower port matches the radius of the corresponding sealing ball 42, and each sealing ball 42 is clamped and fixed in the lower port of the corresponding mounting cover 432. When each oil outlet 41 is closed, the portion of each sealing ball 42 exposed from the corresponding mounting cover 432 is respectively clamped at the junction of the corresponding oil outlet nozzle 403 and the upper part of the lower housing 402 where it is located, and the lower end of each mounting cover 432 is respectively against the inner surface of the lower housing 402 above the corresponding oil outlet nozzle 403 in the circumferential direction. On the one hand, the sealing ball 42 can be firmly installed on the push rod 431. On the other hand, the double-layer seal between the sealing ball 42 and the lower end of the mounting cover 432 can better seal the oil outlet 41 to prevent oil droplets from seeping out of the oil outlet 41 when not refueling. On the other hand, the relative sliding between the lower end of the mounting cover 432 and the inner surface of the upper shell 401 can make the sealing ball 42 move up and down more smoothly.

[0058] The method for refueling the door hinge structure 3 in the present invention comprises the following steps: first, the door body 6 is opened to the maximum angle, and then each door hinge structure 3 is refueled through the refueling device 4, and the door body 6 is closed after the refueling is completed, wherein the amount of refueling of each of the above-mentioned door hinge structures 3 is positively correlated with the wear intensity of the sliding block 33 and the sliding surface 320 of each door hinge structure 3 during the door opening and closing process.

[0059] Preferably, the wear intensity of the sliding block 33 and the sliding surface 320 of each of the above-mentioned door hinge structures 3 is related to the number of door openings and closings (one door opening plus one door closing is counted as one time), and includes the first wear stage, the second wear stage and the third wear stage in sequence according to the number of door openings and closings, wherein the wear intensity of the first wear stage and the third wear stage is greater, while the wear intensity of the second wear stage is smaller. Therefore, the wear intensity can be objectively judged by the number of door openings and closings.

[0060] Further, if Fig.10 As shown, the amount of oil added to each of the above-mentioned door hinge structures 3 is recorded as y, and the number of times the door body 6 is opened and closed is x, then:

[0061] , wherein 0<x<20000 is the first wear stage mentioned above, 20000≤x≤31500 is the second wear stage mentioned above, and 31500>x is the third wear stage mentioned above.

[0062] According to the wear theory, the wear of each door hinge structure 3 in the present invention is divided into the above three stages: the first wear stage (running-in stage), the second wear stage (stable wear stage) and the third wear stage (severe wear stage), wherein the wear intensity of the first wear stage and the third wear stage is relatively large, while the wear intensity of the second wear stage is relatively small. According to the above analysis, the present invention quantitatively designs the above formula for the relationship between the number of door openings and closings and the amount of oil, so that the amount of oil can be controlled according to different wear stages (i.e. different wear intensities), which can not only better ensure the lubrication effect, but also effectively avoid the problems caused by excessive oiling.

[0063] Specifically, in this embodiment, the angle sensor 5 is used to obtain the number of times the door body 6 is opened and closed, and the information is transmitted to the controller. The controller uses the information or the wear stage to obtain the wear intensity from the wear stage, and then controls the opening and closing of the drive device 43 through the solenoid valve 44 according to the wear intensity, thereby controlling the action of the sealing ball 42 to obtain the required amount of refueling. When refueling, the angle sensor 5 is used to obtain the opening angle of the door body 6. When the door body 6 is fully opened (such as Figure 1 As shown), the refueling operation begins, and when the required refueling amount is completed, the door body 6 is closed.

Claims

1. A household appliance with a door hinge structure, comprising a housing (1) with a front opening and a door (6) for opening and closing the front opening, wherein the left and right sides of the lower end of the door (6) are rotatably connected to the housing (1) via a door hinge structure (3), characterized in that: Each of the door hinge structures (3) comprises a connecting member (31) and a base (32) rotatably connected to the connecting member (31), wherein one end of the connecting member (31) is fixed to the door body (6) and the other end is provided with a sliding block (33), and the base (32) is fixed to the box body (1) and has a sliding surface (320). During the process of opening and closing the door, each connecting member (31) rotates relative to the corresponding base (32), and the sliding block (33) on each connecting member (31) slides along the sliding surface (320) of the corresponding base (32); It also includes an oiling device (4) for adding lubricating oil to the contact point between each sliding block (33) and the corresponding sliding surface (320).

2. The household appliance with a door hinge structure according to claim 1, characterized in that: The refueling devices (4) correspond to the door hinge structures (3) one by one, and each refueling device (4) is located on the corresponding door hinge structure (3). In the refueling state, the lubricating oil in each refueling device (4) drips into the corresponding door hinge structure (3) from top to bottom.

3. The household appliance with a door hinge structure according to claim 2, characterized in that: In the refueling state, the oil outlet (41) of each refueling device (4) is respectively opposite to the corresponding sliding block (33) in the upper and lower directions.

4. The household appliance with a door hinge structure according to claim 3, characterized in that: Each of the sliding surfaces (320) extends up and down. During the process of opening and closing the door, each sliding block (33) slides back and forth along the length direction of the corresponding sliding surface (320). Furthermore, in the refueling state, each of the sliding blocks (33) is located at the upper end of the corresponding sliding surface (320) and the top surface of each sliding block (33) is tilted downward along the setting direction of the sliding surface (320), and the oil outlet (41) of each refueling device (4) is vertically opposite to the upper end of the top surface of the corresponding sliding block (33).

5. The household appliance with a door hinge structure according to any one of claims 1 to 4, characterized in that: Each of the door hinge structures (3) is vertically arranged on the left and right sides of the box body (1) along the front-back direction, and the connecting member (31) and the base (32) of each door hinge structure (3) are both plates, which are arranged at intervals on the left and right sides and are rotatably connected through a rotating shaft (34) extending on the left and right sides. Furthermore, the lower ends of the connecting members (31) in each door hinge structure (3) are respectively fixed to the door body (6), and the above-mentioned sliding blocks (33) are respectively installed on the inner side surfaces of the upper ends, and each sliding block (33) is respectively clamped between the corresponding connecting member (31) and the base (32), and each sliding surface (320) is respectively located on the inner side surface of the corresponding base (32).

6. The household appliance with a door hinge structure according to claim 5, characterized in that: The outer surface of each sliding block (33) is smooth and is installed in the mounting hole (310) of the corresponding connecting member (31) via a mounting shaft (36) extending left and right, and is positioned on the corresponding connecting member (31) via a positioning assembly (35).

7. A household appliance with a door hinge structure according to any one of claims 1 to 4, characterized in that: Each of the refueling devices (4) comprises a housing (40) extending upward and downward, the housing (40) being hollow to form an oil storage chamber (400), and an oil outlet (41) communicating with the oil storage chamber (400) being provided at the bottom of the housing (40), and also comprising a control component for controlling the opening and closing of the oil outlet (41).

8. The household appliance with a door hinge structure according to claim 7, characterized in that: Each of the control components comprises: A sealing ball (42), located in the oil storage cavity (400) and used to seal the oil outlet (41); A driving device (43) for driving the sealing ball (42) to move up and down to open and close the oil outlet (41); as well as The solenoid valve (44) is connected to the electrical signal of the controller of the household appliance and is used to control the opening and closing of the driving device (43).

9. The household appliance with a door hinge structure according to claim 8, characterized in that: It also comprises an angle sensor (5) for detecting the door opening angle and the number of door opening and closing times, and the angle sensor (5) is connected to the controller of the household appliance by an electrical signal.

10. The household appliance with a door hinge structure according to claim 8, characterized in that: The housing (40) of each of the refueling devices (4) comprises an upper housing (401) having a cylindrical shape and a lower housing (402) having an inverted conical shape, the radii of the two are equal, and the bottom of the upper housing (401) and the top of the lower housing (402) are both open and connected in the circumferential direction, and the bottom of the lower housing (402) is open to form the above-mentioned oil outlet (41). The driving device (43) is a push rod motor, which is mounted on the outer top surface of the upper shell (401). The solenoid valve (44) is mounted on the driving device (43). The push rod (431) of the driving device (43) extends along the axial direction of the shell (40) and extends into the shell (40), and the sealing ball (42) is mounted on the bottom end of the push rod (431).

11. The household appliance with a door hinge structure according to claim 10, characterized in that: The lower end of each lower shell (402) is uniformly contracted inwardly along the axial direction to form a conical oil outlet nozzle (403), and the above-mentioned oil outlet (41) is located at the bottom of the oil outlet nozzle (403). When each sealing ball (42) respectively seals the upper end of the corresponding oil outlet nozzle (403), each oil outlet (41) is closed.

12. The household appliance with a door hinge structure according to claim 11, characterized in that: Each of the control components further comprises a truncated cone-shaped mounting cover (432), each mounting cover (432) is disposed in the housing (40) with the central axis of the corresponding housing (40) as the center, and the upper end of each mounting cover (432) is fixed to the lower end of the corresponding push rod (431) along the circumferential direction, and the aperture of the lower port matches the radius of the corresponding sealing ball (42), and each sealing ball (42) is fixed in the lower port of the corresponding mounting cover (432). When each oil outlet (41) is closed, the portion of each sealing ball (42) exposed outside the corresponding mounting cover (432) is respectively clamped at the junction of the corresponding oil outlet nozzle (403) and the upper part of the lower shell (402) in which it is located, and the lower end of each mounting cover (432) is respectively abutted against the inner surface of the lower shell (402) above the corresponding oil outlet nozzle (403) along the circumferential direction.

13. A method for refueling a door hinge structure of a household appliance with a door hinge structure as claimed in any one of claims 1 to 12, characterized in that: The amount of oil added to each door hinge structure (3) is positively correlated with the wear intensity of the sliding block (33) and the sliding surface (320) of each door hinge structure (3) during the door opening and closing process.

14. A method for refueling a door hinge structure (3) of a household appliance with a door hinge structure as claimed in claim 13, characterized in that The method comprises the following steps: firstly, the door body (6) is opened to the maximum angle, then oil is added to each door hinge structure (3) through an oiling device (4), and after the oiling is completed, the door body (6) is closed.

15. The method for refueling a door hinge structure (3) of a household appliance with a door hinge structure as claimed in claim 13, characterized in that: The wear intensity of the sliding block (33) and the sliding surface (320) of each of the door hinge structures (3) is related to the number of times the door is opened and closed, and includes a first wear stage, a second wear stage and a third wear stage in sequence according to the number of times the door is opened and closed, wherein the wear intensity of the first wear stage and the third wear stage is respectively greater than the wear intensity of the second wear stage.

16. The method for refueling a door hinge structure of a household appliance with a door hinge structure according to claim 15, characterized in that: The amount of oil added to each door hinge structure (3) is denoted as y, and the number of times the door body (6) is opened and closed is denoted as x, then: , wherein 0<x<20000 is the first wear stage mentioned above, 20000≤x≤31500 is the second wear stage mentioned above, and 31500>x is the third wear stage mentioned above.

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