Water tank type cleaning machine

Abstract

The utility model relates to a water tank type cleaning machine which can avoid structural interference between a door body and a tank body in the door opening and closing process, reduce a gap between the rear edge of the door body and the rear wall of the tank body after the door is closed, and improve the use experience of a user. The water tank type cleaning machine comprises a tank body; a door body; the center-variable hinge mechanism comprises a hinge base fixedly installed in the groove body, a hinge support fixedly installed on the door body, a sliding shaft arranged on the hinge base and connected with the hinge support in a sliding mode, a damper installed on the hinge support and connected with the sliding shaft in an abutting mode, and a connecting rod connected with the hinge base and the hinge support in a pivoted mode. When the door body rotates relative to the groove body so as to open or close the door, the sliding shaft slides relative to the hinge support so as to rotate the hinge support relative to the hinge base in a center-variable mode, and therefore the damper is stretched or compressed. And the gap between the rear edge of the door body and the rear wall of the tank body is firstly reduced and then increased.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a water tank type cleaning machine. Background Art

[0002] As a common household appliance, a sink-type washing machine can be used to wash dishes or fruits and vegetables, etc., and its door body is usually movably connected to the trough body through a hinge assembly. However, the existing hinge assembly itself usually does not have a damping function, resulting in the door body closing too fast, which is easy to pinch the user.

[0003] In order to solve this problem, in addition to installing a hinge assembly between the door body and the trough body, the existing trough-type cleaning machines also add an additional damper between the door body and the trough body. Not only does it require installation space for the hinge assembly and the damper to be reserved on both the door body and the trough body, which increases the difficulty of installation, but it also requires a sufficiently large gap to be reserved between the rear edge of the door body and the rear wall of the trough body to avoid structural interference between the door body and the trough body when opening and closing the door. However, after closing the door, the larger gap between the rear edge of the door body and the rear wall of the trough body will cause a gap problem, which seriously affects the user experience. Utility Model Content

[0004] Based on this, it is necessary to address the serious gap problem in existing water tank type cleaning machines. The utility model provides a water tank type cleaning machine, which can avoid structural interference between the door body and the tank body during the door opening and closing process, while reducing the gap between the rear edge of the door body and the rear wall of the tank body after closing the door, thereby improving the user experience.

[0005] In one embodiment of the present application, the utility model provides a water tank cleaning machine, comprising:

[0006] Tank body;

[0007] Door body; and

[0008] The variable-center hinge mechanism includes a hinge base fixed to the slot body, a hinge bracket fixed to the door body, a sliding shaft arranged on the hinge base and slidably connected to the hinge bracket, a damper installed on the hinge bracket and abutting against the sliding shaft, and a connecting rod pivotally connected to the hinge base and the hinge bracket respectively; when the door body rotates relative to the slot body to open or close the door, the sliding shaft slides relative to the hinge bracket to variably rotate the hinge bracket relative to the hinge base, so that the damper is stretched or compressed; and the gap between the rear edge of the door body and the rear wall of the slot body first becomes smaller and then becomes larger.

[0009] According to one embodiment of the present application, when the gap between the rear edge of the door body and the rear wall of the slot body is the smallest, the opening angle of the door body relative to the slot body is between 10° and 20°.

[0010] According to one embodiment of the present application, the hinge bracket includes a slide portion for guiding the sliding of the sliding shaft and an installation cavity integrally connected to the slide portion; the damper includes a damping body installed in the installation cavity, a push block abutting the sliding shaft, and a shaft connecting the push block to the damping body.

[0011] According to one embodiment of the present application, the connecting rod includes a cantilever riveted to the hinge bracket and a pin rotatably inserted into the cantilever; the pin is riveted and fixed to the hinge base, and the cantilever extends in a curved manner from the hinge bracket to the pin.

[0012] According to one embodiment of the present application, the connecting rod further includes an oil storage gasket sleeved on the pin, and the oil storage gasket is located between the cantilever and the hinge base.

[0013] According to one embodiment of the present application, the hinge base includes a mounting base and a mounting bracket extending upward from the mounting base, the pin and the sliding shaft are riveted and fixed to the mounting bracket respectively, and the sliding shaft is located between the pin and the mounting base.

[0014] According to one embodiment of the present application, the number of the mounting brackets in the hinge base is two, and the two mounting brackets are arranged at intervals on the mounting substrate; the number of the connecting rods in the variable-center hinge mechanism is two, the cantilevers in the two connecting rods are located between the two mounting brackets, and the hinge bracket is located between the two cantilevers.

[0015] According to one embodiment of the present application, the hinge bracket further includes a limiting portion protruding from the slide portion toward the mounting bracket, the limiting portion extends along the slide portion, and is limitedly abutted against the cantilever after the door is opened to limit the maximum opening angle of the door body to between 90° and 130°.

[0016] According to an embodiment of the present application, the hinge bracket further includes a metal piece protruding from the limiting portion, and the metal piece directly contacts the mounting bracket.

[0017] According to an embodiment of the present application, the metal component is partially embedded in the limiting portion, and the metal component extends along the slide portion.

[0018] In summary, during the door opening process of the sink-type cleaning machine of the present application, the gap L between the rear edge of the door body and the rear wall of the trough body first decreases slowly and then increases rapidly; and during the door closing process, the gap L between the rear edge of the door body and the rear wall of the trough body first decreases rapidly and then increases slowly; this not only ensures that there is no structural interference between the door body and the trough body during the door opening and closing process, but also minimizes the gap between the door body and the trough body when the door is closed, thereby improving the overall appearance of the sink-type cleaning machine.

[0019] In addition, during the process of closing the door, the hinge bracket will rotate with the door body to approach the hinge base. At this time, the sliding shaft will slide relative to the hinge bracket to squeeze the damper, so that the damper is compressed and generates damping, preventing the door body from closing too quickly and pinching the user; during the process of opening the door, the hinge bracket will rotate away from the hinge base under the drive of the door body. At this time, the sliding shaft will slide relative to the hinge bracket to release the damper, so that the damper is stretched and does not generate damping, thereby improving the user's door opening experience and facilitating it to be compressed and generate damping when the door body is closed next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional schematic diagram of a water tank cleaning machine according to an embodiment of the present application;

[0021] Figure 2 An exploded schematic diagram of a water tank cleaning machine according to the above embodiment of the present application is shown;

[0022] Figure 3 A schematic diagram showing the state of the revolving hinge mechanism when the water tank cleaning machine according to the above embodiment of the present application completes closing the door is shown;

[0023] Figure 4 Shows Figure 3 An exploded schematic diagram of the variable-center hinge mechanism shown;

[0024] Figure 5 A schematic diagram showing the state of the center-changing hinge mechanism when the water tank cleaning machine according to the above embodiment of the present application completes the door opening;

[0025] Figure 6 Shows Figure 5 A cross-sectional schematic diagram of a variable-center hinge mechanism shown;

[0026] Figure 7 A schematic diagram showing the state of the water tank cleaning machine according to the above embodiment of the present application when the door is closed;

[0027] Figure 8 A schematic diagram showing the state of the water tank cleaning machine in the process of opening and closing the door according to the above embodiment of the present application is shown;

[0028] Fig. 9 A schematic diagram of the state of the water tank cleaning machine according to the above embodiment of the present application when the door is opened is shown.

[0029] Explanation of the main component symbols: 1. Sink type cleaning machine; 10. Sink body; 20. Door body; 30. Variable center hinge mechanism; 31. Hinge base; 311. Mounting base plate; 312. Mounting bracket; 313. Mounting base; 32. Hinge bracket; 321. Slide part; 3211. First slide section; 3212. Second slide section; 322. Mounting cavity; 323. Limiting part; 324. Metal part; 33. Sliding shaft; 34. Damper; 341. Damper body; 342. Push block; 343. Shaft rod; 35. Connecting rod; 351. Cantilever; 352. Pin; 353. Oil storage gasket.

[0030] The above main component symbols are combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] Considering the serious gap problem of existing water tank cleaning machines, the present application provides a water tank cleaning machine, which can avoid structural interference between the door body and the tank body during the door opening and closing process, reduce the gap between the rear edge of the door body and the rear wall of the tank body after closing the door, and improve the user experience.

[0038] Specifically, refer to the attached Figures 1 to 9 As shown, one embodiment of the present application provides a water tank type washing machine 1, which may include a tank body 10 with an opening, a door body 20 for covering the opening of the tank body 10, and a variable-center hinge mechanism 30 provided between the tank body 10 and the door body 20, so that the door body 20 can rotate relative to the tank body 10 to open and close the door. It can be understood that the water tank type washing machine of the present application can be used to wash tableware or fruits and vegetables, etc., and can also include but is not limited to a functional body capable of realizing functions such as washing dishes or heating, which will not be described in detail in the present application.

[0039] More specifically, if Figures 2 to 9 As shown, the variable-center hinge mechanism 30 may include a hinge base 31 fixed to the slot body 10, a hinge bracket 32 ​​fixed to the door body 20, a sliding shaft 33 provided on the hinge base 31 and slidably connected to the hinge bracket 32, a damper 34 installed on the hinge bracket 32 ​​and abutting against the sliding shaft 33, and a connecting rod 35 pivotally connected to the hinge base 31 and the hinge bracket 32, respectively. It can be understood that in other examples of the present application, the hinge base 31 can be fixedly connected to the door body 20, and the hinge bracket 32 ​​can be fixedly connected to the slot body 10, and the required hinge function can still be achieved, and this application will not repeat it.

[0040] In this way, Figures 7 to 9 As shown, when the door body 20 rotates relative to the slot body 10 to open or close the door, the sliding shaft 33 slides relative to the hinge bracket 32 ​​to eccentrically rotate the hinge bracket 32 ​​relative to the hinge base 31, so that the damper 34 is stretched or compressed, and the gap L between the rear edge of the door body 20 and the rear wall of the slot body 10 first becomes smaller and then becomes larger.

[0041] In particular, if Figure 8 As shown in FIG. 1 , when the gap between the rear edge of the door body 20 and the rear wall of the trough body 10 is the smallest, the opening angle θ of the door body 20 relative to the trough body 10 is between 10° and 20°. Figure 9 to Figure 7 As shown, during the door closing process, the gap L between the rear edge of the door body 20 and the rear wall of the slot body 10 first decreases rapidly and then increases slowly; Figures 7 to 9 As shown, during the door opening process, the gap L between the rear edge of the door body 20 and the rear wall of the trough body 10 first slowly decreases and then quickly increases; this not only ensures that there is no structural interference between the door body 20 and the trough body 10 during the door opening and closing process, but also minimizes the gap between the door body 20 and the trough body 10 when the door is closed, thereby improving the overall appearance of the trough cleaning machine 1.

[0042] It is worth noting that since the door body 20 in the water tank type cleaning machine 1 of the present application is usually located above the tank body 10 and opens upward, the gap between the door body 20 and the tank body 10 is at the top of the cleaning machine. If the gap between the door body 20 and the tank body 10 is large, it will be very conspicuous and directly affect the overall appearance of the cleaning machine; therefore, the water tank type cleaning machine 1 of the present application limits the opening angle θ when the gap L is minimum to between 10° and 20° through the variable-center hinge mechanism 30, so that the gap L changes slowly when the door body 20 is opened at a smaller angle, and the gap L changes rapidly when the door body 20 is opened at a larger angle. This not only avoids structural interference between the door body 20 and the tank body 10 during the entire door opening and closing process, but also ensures that the gap L between the rear edge of the door body 20 and the rear wall of the tank body 10 remains in a small range when the door is closed, thereby improving the overall appearance of the water tank type cleaning machine 1.

[0043] In addition, if Figures 7 to 9 As shown, during the process of closing the door, the hinge bracket 32 ​​will rotate with the door body 20 to get closer to the hinge base 31. At this time, the sliding shaft 33 will slide relative to the hinge bracket 32 ​​to squeeze the damper 34, so that the damper 34 is compressed to generate damping, thereby preventing the door body 20 from closing too quickly and pinching the user; during the process of opening the door, the hinge bracket 32 ​​will rotate away from the hinge base 31 under the drive of the door body 20. At this time, the sliding shaft 33 will slide relative to the hinge bracket 32 ​​to release the damper 34, so that the damper 34 is stretched, so that it can be compressed to generate damping when the door body 20 is closed next time.

[0044] For example, Figures 4 to 9 As shown, the hinge bracket 32 ​​may include a slide portion 321 for guiding the sliding shaft 33 to slide and a mounting cavity 322 integrally connected to the slide portion 321; the damper 34 is disposed within the mounting cavity 322 so that the hinge bracket 32 ​​serves as a damper housing.

[0045] Alternatively, if Figure 4 and Figure 7 As shown, the damper 34 includes a damping body 341 installed in the installation cavity 322, a push block 342 abutting against the sliding shaft 33, and a shaft 343 connecting the push block 342 and the damping body 341. In this way, when the hinge bracket 32 ​​rotates relative to the hinge base 31 to make the sliding shaft 33 slide toward the damping body 341 along the slideway portion 321, the sliding shaft 33 pushes the push block 342 to approach the damping body 341, so as to drive the shaft 343 to squeeze the damping body 341 to generate a damping force. It can be understood that the damping body 341 mentioned in the present application can be implemented as, but not limited to, a structure such as a hydraulic rod, a pneumatic rod or a spring that can generate damping due to being squeezed, and the present application will not repeat this.

[0046] It is worth noting that the variable-center hinge mechanism 30 of the present application organically integrates the variable-center hinge structure and the damper. During installation, it is only necessary to fix the trough body 10 and the door body 20 to the hinge base 31 and the hinge bracket 32 ​​of the variable-center hinge mechanism 30 respectively, which not only effectively reduces the installation space, but also greatly reduces the difficulty of installation.

[0047] In addition, since the two ends of the connecting rod 35 in the variable-center hinge mechanism 30 are rotatably connected to the hinge base 31 and the hinge bracket 32, respectively, and the sliding shaft 33 can slide along the slide portion 321 of the hinge bracket 32, the door body 20 rotates around the sliding shaft 33 in the first half of the closing of the door body 20 and the trough body 10; and in the second half of the closing of the door body 20 and the trough body 10, the door body 20 rotates around the end of the connecting rod 35 pivotally connected to the hinge base 31, so that the door body 20 can achieve variable-center rotation during the closing process, which can not only avoid structural interference between the door body 20 and the trough body 10 during the process of opening and closing the door, and ensure that there is a sufficiently small gap between the door body 20 and the trough body 10 when the door is closed, thereby ensuring the overall beauty of the equipment and improving the user experience; but also the hinge can be made very thin as a whole to meet the space requirements of the sink-type cleaning machine 1 when the door is closed.

[0048] Alternatively, if Figure 4 and Figure 7 As shown, the slide portion 321 in the hinge bracket 32 ​​has a first slide section 3211 arranged parallel to the shaft 343 and a second slide section 3212 extending in a curved manner from one end of the first slide section 3211 adjacent to the hinge base 31 . In this way, in the first half of closing the door, the sliding shaft 33 will slide along the second sliding section 3212 to slowly squeeze the push block 342, so that the push block 342 slowly applies a squeezing force to the damping body 341 through the shaft 343, causing the damping body 341 to produce less damping, so that the user can rotate the door body 20 with a smaller thrust, thereby improving the user's door closing experience; and in the second half of closing the door, the sliding shaft 33 will slide from the second sliding section 3212 into the first sliding section 3211 and continue to slide along the first sliding section 3211 to quickly squeeze the push block 342, so that the push block 342 quickly applies a squeezing force to the damping body 341 through the shaft 343, causing the damping body 341 to produce greater damping, thereby preventing the door body 20 from closing too quickly and pinching the user. It is understandable that in other examples of the present application, the second slide section 3212 may also extend obliquely from one end of the first slide section 3211 adjacent to the hinge base 31, as long as the speed at which the slide shaft 33 squeezes the push block 342 can be slowed down, and the present application will not elaborate on this.

[0049] Alternatively, if Figure 4 and Figure 5As shown, the connecting rod 35 includes a cantilever 351 riveted to the hinge bracket 32 ​​and a pin 352 rotatably inserted into the cantilever 351, and the pin 352 is riveted and fixed to the hinge base 31, so that the two ends of the cantilever 351 are rotatably connected to the hinge bracket 32 ​​and the hinge base 31 respectively.

[0050] Alternatively, if Figure 4 and Figure 5 As shown, the connecting rod 35 further includes an oil storage gasket 353 which is sleeved on the pin 352 , and the oil storage gasket 353 is located between the cantilever 351 and the hinge base 31 so as to reduce the friction between the cantilever 351 and the hinge base 31 .

[0051] Alternatively, if Figure 5 and Figure 6 As shown, the cantilever 351 extends in a curved manner from the hinge bracket 32 ​​to the pin 352 so as to avoid the sliding shaft 33 when closing the door, thereby preventing structural interference between the cantilever 351 and the sliding shaft 33, ensuring that the sliding shaft 33 slides smoothly along the slide portion 321, thereby ensuring that the door body 20 is perfectly closed relative to the slot body 10, and improving the sealing performance between the door body 20 and the slot body 10.

[0052] According to the above embodiments of the present application, Figure 4 and Figure 5 As shown, the hinge base 31 may include a mounting base 311 and a mounting bracket 312 extending upward from the mounting base 311, the pin 352 and the slide shaft 33 are riveted and fixed to the mounting bracket 312 respectively, and the slide shaft 33 is located between the pin 352 and the mounting base 311. In this way, when the door body 20 covers the tank body 10, the pin 352 is located at the upper part of the cantilever 351, so that the hinge bracket 32 ​​is closer to the mounting base 311, ensuring that the gap between the door body 20 and the tank body 10 is minimized, and improving the overall appearance of the device.

[0053] Alternatively, if Figure 3 and Figure 5 As shown, there are two mounting brackets 312 in the hinge base 31, and the two mounting brackets 312 are arranged at intervals on the mounting base plate 311; at the same time, there are two connecting rods 35 in the variable-center hinge mechanism 30, and the cantilevers 351 in the two connecting rods 35 are located between the two mounting brackets 312, and the hinge bracket 32 ​​is located between the two cantilevers 351 to form a double-arm built-in hinge mechanism, which can effectively avoid structural interference between the cantilever 351 and other structures during the door opening and closing process, thereby improving the compactness of the overall structure.

[0054] It is worth noting that, since the cantilever 351 is located between the mounting bracket 312 and the hinge bracket 32, there is a large gap between the slide portion 321 of the hinge bracket 32 ​​and the mounting bracket 312, and the slide shaft 33 can slide along the slide portion 321, causing the hinge bracket 32 ​​to easily shake when rotating relative to the hinge base 31; therefore, in order to solve the problem of the hinge bracket 32 ​​shaking relative to the hinge base 31, as shown in FIG. Figures 4 to 6 As shown, the hinge bracket 32 ​​of the present application generally further includes a limiting portion 323 protruding from the slide portion 321 toward the mounting bracket 312 so as to reduce the gap between the hinge bracket 32 ​​and the mounting bracket 312, which is beneficial to reducing the shaking amplitude of the hinge bracket 32, and the smaller the gap between the two, the smaller the shaking amplitude.

[0055] Alternatively, if Figure 4 and Figure 6 As shown, the limiting portion 323 extends along the slide portion 321 and is limitedly abutted against the cantilever 351 of the connecting rod 35 after the door is opened, so as to limit the maximum opening angle of the door body 20 to between 90° and 130°, thereby preventing the door body 20 from opening at too large an angle and colliding with the wall on the rear side of the sink-type cleaning machine 1, thereby improving the user experience.

[0056] It is worth noting that if the limiting portion 323 of the hinge bracket 32 ​​is directly in contact with the mounting bracket 312 to eliminate the gap between the two, the hinge bracket 32 ​​will inevitably cause friction between the limiting portion 323 and the mounting bracket 312 when rotating. Since the hinge bracket 32 ​​is usually made of a non-wear-resistant zinc alloy, and the hinge base 31 is usually made of a wear-resistant metal, the limiting portion 323 of the hinge bracket 32 ​​will be severely worn when the sink-type cleaning machine 1 is opened and closed many times, resulting in a large gap between the hinge bracket 32 ​​and the mounting bracket 312, and then the hinge bracket 32 ​​shakes, and the variable-center hinge mechanism 30 has to be frequently replaced, resulting in a short service life of the variable-center hinge mechanism 30.

[0057] In order to completely solve the shaking problem of the hinge bracket 32, Figures 4 to 6 As shown, the hinge bracket 32 ​​of the present application may further include a metal piece 324 protruding from the stop portion 323, and the metal piece 324 directly contacts the mounting bracket 312, so as to prevent the stop portion 323 from directly contacting the mounting bracket 312 and being worn, and to avoid the problem of shaking due to the gap between the hinge bracket 32 ​​and the mounting bracket 312. It is understandable that the metal piece 324 mentioned in the present application may be, but is not limited to, made of wear-resistant metal materials such as steel sheets or chrome-plated alloys, and may be made of the same material as the mounting bracket 312.

[0058] Alternatively, if Figure 4 and Figure 6 As shown, the metal member 324 is partially embedded in the limiting portion 323 , and the metal member 324 extends along the slide portion 321 , so as to ensure that the metal member 324 is in contact with the mounting bracket 312 during the entire rotation process of the hinge bracket 32 ​​, thereby improving the rotation stability of the hinge bracket 32 ​​.

[0059] According to the above embodiments of the present application, Figures 3 to 9 As shown, the hinge base 31 may further include a mounting base 313, and the mounting base 311 and the mounting base 313 are respectively located at the upper and lower sides of the trough body 10, so that the mounting base 311 and the mounting base 313 are locked from top to bottom by screws, thereby clamping and fixing the trough body 10 between the mounting base 311 and the mounting base 313. In this way, when components such as the connecting rod 35 or the damper 34 in the variable-center hinge mechanism 30 are damaged and need to be replaced, there is no need to lift out the entire device, and only the screws locked from top to bottom need to be removed, so that the components of the variable-center hinge mechanism 30 except the mounting base 313 can be removed together with the door body 20, which is convenient for replacing a new variable-center hinge mechanism, greatly improving maintenance efficiency.

[0060] It is worth noting that Figures 7 to 9 As shown, the hinge base 31 in the variable-center hinge mechanism 30 can firstly fasten the mounting base 313 to the lower side of the slot body 10 by screws, and then fasten the mounting base plate 311 to the mounting base 313 from top to bottom by screws, so as to reserve more screwing space for the user, which helps to reduce the difficulty of locking the hinge base 31 and the slot body 10. It can be understood that the hinge bracket 32 ​​in the variable-center hinge mechanism 30 can also be fastened to the door body 20 by screws to achieve a detachable connection between the door body 20 and the variable-center hinge mechanism 30.

[0061] In addition, since the installation of the door body 20 has high requirements on the size, the variable-center hinge mechanism 30 has high requirements on the installation position of the installation base 313. Therefore, the installation base 313 in the variable-center hinge mechanism 30 of the present application can be provided with a positioning structure matching the trough body 10 to improve the installation position accuracy of the installation base 313 and ensure that the installation of the variable-center hinge mechanism 30 will not be offset. It can be understood that in the above-mentioned embodiments of the present application, the fastening connection by screws is only an example. In other embodiments of the present application, riveting or other fasteners can also be used for fixed connection, and this application will not repeat them.

[0062] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A water tank cleaning machine, characterized in that: include: Tank body; Door body; as well as The variable-center hinge mechanism includes a hinge base fixed to the slot body, a hinge bracket fixed to the door body, a sliding shaft arranged on the hinge base and slidably connected to the hinge bracket, a damper installed on the hinge bracket and abutting against the sliding shaft, and a connecting rod pivotally connected to the hinge base and the hinge bracket respectively; when the door body rotates relative to the slot body to open or close the door, the sliding shaft slides relative to the hinge bracket to variably rotate the hinge bracket relative to the hinge base, so that the damper is stretched or compressed; and the gap between the rear edge of the door body and the rear wall of the slot body first becomes smaller and then becomes larger.

2. The water tank cleaning machine according to claim 1, characterized in that: When the gap between the rear edge of the door body and the rear wall of the slot body is the smallest, the opening angle of the door body relative to the slot body is between 10° and 20°.

3. The water tank cleaning machine according to claim 1 or 2, characterized in that: The hinge bracket includes a slide portion for guiding the sliding shaft to slide and a mounting cavity integrally connected to the slide portion; the damper includes a damping body installed in the mounting cavity, a push block abutting against the sliding shaft, and a shaft connecting the push block to the damping body.

4. The water tank cleaning machine according to claim 3, characterized in that: The connecting rod comprises a cantilever riveted to the hinge bracket and a pin rotatably inserted into the cantilever; the pin is riveted and fixed to the hinge base, and the cantilever extends from the hinge bracket to the pin in a curved manner.

5. The water tank cleaning machine according to claim 4, characterized in that: The connecting rod further includes an oil storage gasket sleeved on the pin, and the oil storage gasket is located between the cantilever and the hinge base.

6. The water tank cleaning machine according to claim 5, characterized in that: The hinge base comprises a mounting base plate and a mounting bracket extending upward from the mounting base plate. The pin and the sliding shaft are riveted and fixed to the mounting bracket respectively, and the sliding shaft is located between the pin and the mounting base plate.

7. The water tank cleaning machine according to claim 6, characterized in that: The number of the mounting brackets in the hinge base is two, and the two mounting brackets are arranged on the mounting substrate at intervals; The number of the connecting rods in the variable-center hinge mechanism is two, the cantilevers in the two connecting rods are located between the two mounting brackets, and the hinge bracket is located between the two cantilevers.

8. The water tank cleaning machine according to claim 7, characterized in that: The hinge bracket further includes a limiting portion protruding from the slide portion toward the mounting bracket, the limiting portion extending along the slide portion and abutting against the cantilever after the door is opened to limit the maximum opening angle of the door body to between 90° and 130°.

9. The water tank cleaning machine according to claim 8, characterized in that: The hinge bracket further includes a metal piece protruding from the limiting portion, and the metal piece directly contacts the mounting bracket.

10. The water tank cleaning machine according to claim 9, characterized in that: The metal piece is partially embedded in the limiting portion, and the metal piece extends along the slideway portion.

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