A door panel assembly and sink-type washing machine

Abstract

The application provides a door plate assembly and a sink type tobacco cleaning machine, and relates to the tobacco technical field.The door plate assembly comprises a door plate component, a transmission component and a driving component, the door plate component has a door plate axis, the door plate component comprises a door plate and a door plate hinged piece, and the door plate is rotatably arranged on the door plate hinged piece around the door plate axis.The transmission component comprises a push-pull piece and a sliding piece, the push-pull piece has a push-pull axis and a first direction, the first direction is arranged perpendicularly to the push-pull axis, the sliding piece has a sliding axis, the push-pull axis, the sliding axis and the door plate axis are arranged in parallel, the sliding piece is arranged on the push-pull piece in a manner that the sliding piece can rotate around the sliding axis relative to the push-pull piece and can move in the first direction, and the sliding piece is arranged on the door plate.The driving component is connected with the push-pull piece, and the driving component is used for driving the push-pull piece to rotate around the push-pull axis and driving the door plate to rotate around the door plate axis.The application can realize the labor-saving and stable opening and closing of the door plate.

Description

Technical Field

[0001] This application relates to the field of tobacco technology, and in particular to a door panel assembly and a water tank type tobacco stem washing machine. Background Technology

[0002] In the cigarette processing industry, the water tank type stem washing machine is a key piece of equipment in the tobacco processing line. Its main function is to soak the tobacco stems, that is, to immerse them in water to complete the pretreatment process. The door panel, as part of the water tank type stem washing machine, mainly serves to observe the stem washing process and maintain the inside of the tank. Typically, the door panel consists of three parts, each of which is quite heavy, making it time-consuming and labor-intensive to open and close manually. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a door panel assembly and a water tank type washing machine that can realize labor-saving and smooth opening and closing of the door panel, and provide stable and safe support for the opening state.

[0004] This application provides the following technical solution: In a first aspect, embodiments of this application provide a door panel assembly, the door panel assembly comprising: A door panel assembly having a door panel axis, the door panel assembly including a door panel and a door panel hinge, the door panel being rotatably disposed on the door panel hinge about the door panel axis; A transmission assembly includes a push-pull member and a sliding member. The push-pull member has a push-pull axis and a first direction, the first direction being perpendicular to the push-pull axis. The sliding member has a sliding axis, the push-pull axis, the sliding axis, and the door panel axis are parallel to each other. The sliding member is disposed on the push-pull member in a manner that allows it to rotate relative to the push-pull member about the sliding axis and to move along the first direction. The sliding member is disposed on the door panel. A drive assembly is connected to the push-pull member and is used to drive the push-pull member to rotate around the push-pull axis, thereby causing the door panel to rotate around the door panel axis.

[0005] In some embodiments of the first aspect, the push-pull member is provided with a groove extending along the first direction, the sliding member is provided with a sliding part cooperating with the groove, the sliding part is slidably accommodated in the groove, and the sliding part is a rotating body, the axis of the sliding part and the sliding axis are collinear.

[0006] In some embodiments of the first aspect, the driving component includes: A transmission component, the transmission component having a transmission axis, the transmission axis being arranged parallel to the door panel axis, and the transmission component being connected to the push-pull component; A power component is provided, which is connected to the transmission component in a transmission manner. The transmission component is used to drive the transmission component to rotate around the transmission axis.

[0007] In some embodiments of the first aspect, the drive assembly further includes a carrier, the transmission member is rotatably disposed on the carrier about the transmission axis, and the power member is disposed on the carrier.

[0008] In some embodiments of the first aspect, the number of transmission components is at least two, and the individual transmission components are spaced apart along the axis of the door panel.

[0009] In some embodiments of the first aspect, the push-pull member of each of the transmission components is connected to the transmission component.

[0010] In some embodiments of the first aspect, the power component includes a brakeable drive motor, the main shaft of which is drively connected to the transmission component.

[0011] In some embodiments of the first aspect, the transmission ratio between the main shaft of the drive motor and the transmission member is greater than 1.

[0012] In some embodiments of the first aspect, the main shaft of the drive motor is connected to the transmission component via a chain drive mechanism.

[0013] Secondly, this application also provides a water tank type washing machine, which includes a water washing tank and a door panel assembly as described in any of the above embodiments. The door panel assembly has a door panel hinge disposed in the water washing tank, and the opening of the water washing tank can be closed or opened by rotating the door panel.

[0014] The embodiments of this application have the following advantages: This application provides a door panel assembly in which a drive component (such as a motor) is activated when the door panel needs to be opened or closed. The drive component outputs rotational power, causing a push-pull member directly connected to it to rotate around its own push-pull axis. The rotation of the push-pull member is converted into a complex compound motion through its connection structure with a sliding member. Since the sliding member can rotate relative to the push-pull member around its sliding axis and also move in a first direction perpendicular to the push-pull axis, this connection method constitutes a flexible hinge point. When the push-pull member rotates, it pushes or pulls the sliding member, which in turn transmits this force to the door panel. This force can be decomposed into a torque that causes the door panel to rotate around its axis. Driven by the transmission component, the door panel rotates around its axis on the door panel hinge, thereby achieving a smooth opening or closing action. The entire transmission process is similar to a crank-slider mechanism, converting the circular motion of the push-pull member into the fan-shaped oscillation of the door panel. When the door panel is opened to a specific angle, the entire transmission assembly (especially the push-pull and sliding parts in the extended state) will form a stable triangle or locking structure, thereby providing reliable mechanical support for the open door panel, replacing the traditional unstable bracket.

[0015] Compared to existing technologies, the door panel assembly and trough-type washing machine provided in this application replace purely manual operation with mechanical transmission components, greatly reducing the physical exertion required to open and close heavy door panels. The operation is easy and quick, improving work efficiency. Furthermore, the design of the transmission components (push-pull and sliding parts) ensures the continuity and smoothness of power transmission, making the opening and closing of the door panel smooth and effortless, avoiding the jamming, impact, or abnormal noise that may occur in traditional methods, and reducing equipment wear. Additionally, after the door panel is opened, its weight is supported by the robust transmission components and hinge points, forming an internal and stable support structure.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This illustration shows a structural schematic diagram from one perspective of a door panel assembly provided in an embodiment of this application; Figure 2 This illustration shows a structural schematic diagram from one perspective of a water tank type stem washing machine provided in an embodiment of this application; Figure 3 This illustration shows a structural schematic diagram from another perspective of a water tank type stem washing machine provided in an embodiment of this application.

[0019] Explanation of key component symbols: 10-Door panel assembly; 100-Door panel component; 110-Door panel; 120-Door panel hinge; 200-Transmission component; 210-Sliding component; 220-Push-pull component; 300-Drive component; 310-Transmission component; 320-Chain drive mechanism; 330-Drive motor; 20-Washing tank. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] In related technologies, the water tank type stem washing machine is a key piece of equipment in the cigarette processing production line of the tobacco industry. Its main function is to soak the stems, that is, to immerse water in the stems to complete the pretreatment process. The door panel 110, as part of the water tank type stem washing machine, mainly serves to observe the stem washing process and maintain the inside of the tank. Typically, the door panel 110 is divided into three parts, each of which is relatively heavy. Manually opening and closing the door panel 110 is time-consuming and laborious, and after opening, it relies on a support frame for support, posing a safety hazard to personnel during the observation and maintenance of the movable frame.

[0026] As shown in Figure 1, Figure 2 and Figure 3 As shown, to solve the above-mentioned technical problems, this application provides a door panel assembly 10. The door panel assembly 10 includes a door panel component 100, a transmission component 200, and a drive component 300. The door panel component 100 has a door panel 110 axis and includes a door panel 110 and a door panel hinge 120. The door panel 110 is rotatably disposed on the door panel hinge 120 around the door panel 110 axis. The transmission component 200 includes a push-pull component 220 and a sliding component 210. The push-pull component 220 has a push-pull axis and a first direction, which is perpendicular to the push-pull axis. The sliding component 210 has a sliding axis, which is parallel to the door panel 110 axis. The sliding component 210 is disposed on the push-pull component 220 in a manner that allows it to rotate relative to the push-pull component 220 around the sliding axis and move along the first direction. The sliding component 210 is disposed on the door panel 110. The drive assembly 300 is connected to the push-pull component 220. The drive assembly 300 is used to drive the push-pull component 220 to rotate around the push-pull axis, thereby causing the door panel 110 to rotate around the axis of the door panel 110.

[0027] In these embodiments, the door panel assembly 100 has a door panel 110 axis. Exemplarily, the door panel 110 is a rectangular flat plate structure made of stainless steel or food-grade engineering plastic, sized to fit the side wall opening of the washing machine tank. A door panel hinge 120 is fixedly mounted on the frame of the washing machine and has an internal bearing or bushing structure. One edge of the door panel 110 is rotatably connected to the door panel hinge 120 via a pivot, allowing the door panel 110 to rotate smoothly around its axis from 0° (closed state) to 90° (fully open state), thereby enabling observation or maintenance operations inside the tank.

[0028] The push-pull member 220 is a rod-shaped structure with a push-pull axis. A first direction is defined as perpendicular to the push-pull axis. For example, in this embodiment, the push-pull axis is horizontally positioned.

[0029] The slider 210 is a slider or a perforated connecting seat with a sliding axis. The push-pull axis and the sliding axis are parallel to each other with the aforementioned door panel 110 axis, for example, extending along the width or length direction of the door panel 110.

[0030] The slider 210 is mounted to the end of the push-pull member 220 via a pin or ball joint structure, so that the slider 210 can rotate freely relative to the push-pull member 220 about the sliding axis (to adapt to angle changes) and slide on the push-pull member 220 in the first direction.

[0031] The other end of the sliding member 210 is fixedly connected to the back of the door panel 110 (the side away from the hinge side), preferably located in the middle of the height direction of the door panel 110 to ensure uniform force distribution.

[0032] This transmission structure allows the motion to be transmitted to the door panel 110 via the sliding member 210 when the push-pull member 220 extends, retracts, or swings. At the same time, it allows the sliding pair to absorb the small displacement of the door panel 110 caused by gravity or assembly errors during the opening / closing process, thereby achieving smooth and jam-free opening and closing actions.

[0033] In this embodiment, the drive assembly 300 adopts an electric push rod motor, the output end of which is fixedly connected to one end of the push-pull member 220. When the motor rotates forward, the push-pull member 220 extends, pushing the sliding member 210 to move along the first direction, thereby driving the door panel 110 to open upward around the axis of the door panel 110; when the motor rotates in reverse, the push-pull member 220 retracts, and the door panel 110 is smoothly closed under the reset action.

[0034] Specifically, the drive assembly 300 can be equipped with limit switches or encoders to precisely control the opening angle of the door panel 110 (e.g., locked at 85° to 90°) and provide a self-locking function when fully open, eliminating the need for additional support brackets and fundamentally eliminating safety hazards such as tipping and slipping caused by traditional manual support.

[0035] In daily use, the operator activates the drive assembly 300 via the control panel. The push-pull component 220 actuates, and the sliding component 210 drives the door panel 110 to slowly open around its axis to a preset angle and automatically lock. After maintenance, the reverse operation allows for smooth closing of the door panel 110. The entire process eliminates the need for manual lifting of the heavy door panel 110, significantly reducing labor intensity and improving operational safety and efficiency.

[0036] In some embodiments, the push-pull member 220 is provided with a slide groove that extends along a first direction, and the slider 210 is provided with a sliding part that cooperates with the slide groove. The sliding part is slidably accommodated in the slide groove, and the sliding part is a rotating body with the axis of the sliding part and the sliding axis collinear.

[0037] In these embodiments, to further improve the smoothness of movement and structural reliability during the opening and closing of the door panel 110, the push-pull member 220 is provided with a sliding groove that extends along the first direction. Correspondingly, the sliding member 210 is provided with a sliding part that cooperates with the sliding groove.

[0038] Specifically, the sliding part is constructed as a cylindrical or spherical rotating structure (such as a pin, roller, or boss with a bushing), with a smooth outer surface to facilitate smooth sliding within the groove. The axis of the sliding part is collinear with the sliding axis, thereby ensuring that the sliding member 210 can still rotate freely around the sliding axis while sliding relative to the push-pull member 220, to accommodate the relative displacement of the door panel 110 caused by angular changes during opening / closing.

[0039] During assembly, the sliding part is embedded in the slide groove to form a sliding-rotating composite pair: on the one hand, it allows the sliding part 210 to move back and forth in the slide groove along the first direction to transmit the driving force of the push-pull part 220; on the other hand, it allows the sliding part 210 to rotate slightly around the sliding axis to compensate for the angular deviation between the door panel 110 and the push-pull part 220 when the door panel 110 rotates, effectively avoiding jamming or stress concentration.

[0040] In some embodiments, the drive assembly 300 includes a transmission member 310 and a power member. The transmission member 310 has a transmission shaft that is parallel to the axis of the door panel 110. The transmission member 310 is connected to the push-pull member 220. The power member and the transmission member 310 are connected in a transmission manner, and the transmission member 310 is used to drive the transmission member 310 to rotate around the transmission shaft.

[0041] In these embodiments, the controllability and transmission smoothness of the drive system are further improved. Among them, the transmission component 310 is a component such as a rotating shaft, lead screw or gear shaft, and has a transmission axis. The transmission axis is arranged parallel to the axis of the aforementioned door panel 110, and one end of the transmission component 310 is connected to the push-pull component 220.

[0042] The power component is an electric motor (such as a geared motor or servo motor) or a hydraulic motor, whose output shaft is connected to the transmission component 310 via a coupling, synchronous belt, chain, or gear pair. After the power component is started, it drives the transmission component 310 to rotate around the transmission axis, which in turn drives the push-pull component 220 to swing, and finally pushes the door panel 110 to open or close around the axis of the door panel 110 through the sliding component 210.

[0043] In addition, since the drive shaft is parallel to the axis of the door panel 110, the entire drive system has a compact layout, which can effectively utilize the side wall space of the washing machine and avoid interfering with other functional modules.

[0044] In some embodiments, the drive assembly 300 further includes a carrier, a transmission member 310 rotatably mounted on the carrier about a transmission axis, and a power member mounted on the carrier.

[0045] In these embodiments, the structural rigidity, installation accuracy, and maintenance convenience of the drive system are further improved.

[0046] The load-bearing component is a rigid bracket, mounting plate, or frame extension structure, fixedly connected to the main frame of the trough-type stem washing machine. The transmission component 310 is rotatably mounted on the load-bearing component around the transmission axis through a support structure such as a bearing seat, bushing, or rolling bearing, ensuring smooth and unbiased rotation. Meanwhile, the power component (such as a geared motor) is also directly mounted on the surface of the load-bearing component, for example, by bolting it to the side wall or top of the load-bearing component.

[0047] This layout allows the transmission component 310 and the power component to form a modular drive unit, with their relative positions precisely defined by the load-bearing component, effectively avoiding transmission misalignment caused by equipment vibration or long-term operation.

[0048] For example, in one specific embodiment, the support member is an L-shaped steel plate, with its vertical portion fixed to the side wall of the stalk washing machine and its horizontal portion used to install the power component. The two ends of the transmission component 310 are respectively mounted on the front and rear ends of the support member via two seated bearings, ensuring that the transmission axis is strictly parallel to the axis of the door panel 110. The output shaft of the power component is coaxially connected to one end of the lead screw via a coupling, forming a compact and stable drive module.

[0049] In some embodiments, the number of transmission components 200 is at least two, and the transmission components 200 are spaced apart along the axis of the door panel 110.

[0050] In these embodiments, in order to meet the application requirements of large or heavy door panels 110, the door panel 110 is avoided from twisting, jamming or local stress concentration caused by single-point drive.

[0051] Each transmission component 200 is installed on the back of the door panel 110, maintaining a certain distance from each other along the axis of the door panel 110. Each transmission component 200 is connected to the drive component 300 independently or synchronously, and together they bear the opening and closing load of the door panel 110.

[0052] In one embodiment, two transmission assemblies 200 are provided. Two push-pull members 220 are driven by the same transmission member 310, which extends along the axis of the door panel 110 and is connected to the two push-pull members 220 at both ends. When the power member drives the transmission member 310 to rotate, the two push-pull members 220 move synchronously along a first direction, thereby causing the door panel 110 to open or close smoothly and without deviation.

[0053] In another embodiment, each transmission component 200 is equipped with an independent drive unit (such as dual-motor synchronous control), and the consistency of action is ensured by a PLC or mechanical linkage mechanism. This solution is suitable for extra-wide door panels 110 or applications requiring extremely high synchronization accuracy.

[0054] The transmission components 200, which are arranged at multiple points, significantly improve the rigidity and stability of the door panel 110 movement, effectively preventing deformation caused by the weight of the door panel 110 or long-term use.

[0055] In some embodiments, the push-pull member 220 of each transmission component 200 is connected to the transmission component 310.

[0056] In these embodiments, to ensure that the multiple transmission components 200 operate in a highly synchronized manner and to prevent the door panel 110 from twisting or jamming during opening and closing, the push-pull member 220 of each transmission component 200 is connected to the same transmission component 310.

[0057] Specifically, the transmission component 310 extends along the axis of the door panel 110, and its length covers the installation positions of each transmission assembly 200. Each push-pull component 220 is connected to the transmission component 310 via a threaded connection, slider connection, or crank mechanism. When the power component drives the transmission component 310 to rotate around the transmission axis, all push-pull components 220 synchronously generate displacement in the first direction, thereby driving their corresponding sliders 210 to synchronously push the door panel 110, achieving smooth overall rotation.

[0058] Since they share the same transmission component 310, the displacement and speed of the two push-pull components 220 are completely consistent, fundamentally eliminating the risk of asynchrony.

[0059] In some embodiments, the power component includes a brakeable drive motor 330, the main shaft of which is connected to a transmission component 310.

[0060] In these embodiments, to ensure that the door panel 110 can reliably maintain its position at any opening angle (especially in the fully open state), and to prevent accidental closure due to gravity, vibration or external force.

[0061] For example, the drive motor 330 is a geared motor, a brake motor, or a servo motor with an integrated electromagnetic brake. Its main shaft is connected to the transmission component 310 via a coupling, synchronous pulley, or gear pair. When the motor is powered on, the main shaft outputs rotational power, driving the transmission component 310 to rotate around the transmission axis, thereby moving the push-pull component 220 to open or close the door panel 110. When the motor is powered off, reaches a preset position, or receives a stop command, the built-in electromagnetic brake automatically locks the main shaft, preventing it from continuing to rotate, thereby locking the entire transmission chain and keeping the door panel 110 stably in the current position.

[0062] This braking function is particularly suitable for the safety support requirements when the door panel assembly 10 is in the fully open state. Compared with the traditional method that relies on external brackets or mechanical pins, this solution can achieve automatic and reliable positioning and locking without manual intervention, completely eliminating the safety hazards caused by the door panel 110 accidentally falling when maintenance personnel are working inside the slot.

[0063] In addition, in the event of a sudden power outage, the brake can still achieve emergency braking by relying on spring force or residual magnetic force.

[0064] In some embodiments, the transmission ratio between the spindle of the drive motor 330 and the transmission component 310 is greater than 1.

[0065] In these embodiments, to increase the output torque of the drive system and reduce the opening and closing speed of the door panel 110 to enhance control stability, the transmission connection between the main shaft of the drive motor 330 and the transmission component 310 has a transmission ratio greater than 1.

[0066] Here, a transmission ratio greater than 1 means that the rotational speed of the drive motor 330 spindle is higher than the rotational speed of the transmission component 310, i.e., the system constitutes a reduction transmission mechanism. For example, a transmission ratio of 5:1 means that for every 5 rotations of the drive motor 330 spindle, the transmission component 310 rotates only 1 rotation.

[0067] This speed reduction transmission can be achieved in several ways: Built-in reducer: The drive motor 330 itself is an integrated geared motor with a planetary reducer or worm gear reducer. Its output shaft has a reduction function and is directly connected to the transmission component 310 through a coupling.

[0068] External transmission pair: A gear pair, synchronous belt pulley set or sprocket mechanism is set between the main shaft of the drive motor 330 and the transmission component 310, wherein the number of teeth of the driving pulley (mounted on the main shaft) is less than that of the driven pulley (mounted on the transmission component 310), thereby realizing speed reduction and torque increase.

[0069] In some embodiments, the main shaft of the drive motor 330 is connected to the transmission component 310 via a chain drive mechanism 320.

[0070] In these embodiments, to accommodate larger installation spaces, improve transmission reliability, and facilitate maintenance, the main shaft of the drive motor 330 is connected to the transmission component 310 via a chain drive mechanism 320.

[0071] The chain drive mechanism 320 includes a first sprocket, a second sprocket, and a drive chain meshing between them. The first sprocket is fixedly mounted on the main shaft of the drive motor 330, and the second sprocket is fixedly mounted on one end of the transmission component 310. The axes of the two sprockets coincide with the transmission axes of the main shaft and the transmission component 310, respectively. When the drive motor 330 is running, the main shaft drives the first sprocket to rotate, transmitting power to the second sprocket via the drive chain, thereby driving the transmission component 310 to rotate around the transmission axis.

[0072] In addition, the chain drive mechanism 320 can also be equipped with a tensioning device (such as an adjustable slide rail or tensioning wheel) to compensate for the elongation of the chain during long-term use, ensuring smooth transmission and no skipping of teeth.

[0073] In some embodiments, this application also provides a water tank type washing machine, which includes a water washing tank 20 and a door panel assembly 10 as described in any of the above embodiments. The door panel hinge 120 of the door panel assembly 10 is disposed in the water washing tank 20, and the opening of the water washing tank 20 can be closed or opened by rotating the door panel 110.

[0074] Since the aforementioned door panel assembly 10 has the above-mentioned technical effects, the water tank type stem washing machine including the door panel assembly 10 should have the same technical effects, which will not be elaborated here.

[0075] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0076] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A door panel assembly, characterized in that, The door panel assembly includes: A door panel assembly having a door panel axis, the door panel assembly including a door panel and a door panel hinge, the door panel being rotatably disposed on the door panel hinge about the door panel axis; A transmission assembly includes a push-pull member and a sliding member. The push-pull member has a push-pull axis and a first direction, the first direction being perpendicular to the push-pull axis. The sliding member has a sliding axis, the push-pull axis, the sliding axis, and the door panel axis are arranged parallel to each other. The sliding member is disposed on the push-pull member in a manner that allows it to rotate relative to the push-pull member about the sliding axis and move along the first direction, and the sliding member is disposed on the door panel. A drive assembly is connected to the push-pull member and is used to drive the push-pull member to rotate around the push-pull axis, thereby causing the door panel to rotate around the door panel axis.

2. The door panel assembly according to claim 1, characterized in that, The push-pull member is provided with a sliding groove, which extends along the first direction. The sliding member is provided with a sliding part that cooperates with the sliding groove. The sliding part is slidably accommodated in the sliding groove, and the sliding part is a rotating body. The axis of the sliding part and the sliding axis are collinear.

3. The door panel assembly according to claim 1, characterized in that, The driving component includes: A transmission component, the transmission component having a transmission axis, the transmission axis being arranged parallel to the door panel axis, and the transmission component being connected to the push-pull component; A power component is provided, which is connected to the transmission component in a transmission manner. The transmission component is used to drive the transmission component to rotate around the transmission axis.

4. The door panel assembly according to claim 3, characterized in that, The drive assembly further includes a carrier, the transmission component is rotatably mounted on the carrier about the transmission axis, and the power component is mounted on the carrier.

5. The door panel assembly according to claim 3, characterized in that, The number of transmission components is at least two, and the transmission components are arranged at intervals along the axis of the door panel.

6. The door panel assembly according to claim 5, characterized in that, The push-pull components of each of the aforementioned transmission components are connected to the transmission component.

7. The door panel assembly according to claim 3, characterized in that, The power component includes a brakeable drive motor, and the main shaft of the drive motor is connected to the transmission component.

8. The door panel assembly according to claim 7, characterized in that, The transmission ratio between the main shaft of the drive motor and the transmission component is greater than 1.

9. The door panel assembly according to claim 8, characterized in that, The main shaft of the drive motor is connected to the transmission component via a chain drive mechanism.

10. A water tank type stem washing machine, characterized in that, The water tank type stem washing machine includes a water washing tank and a door panel assembly as described in any one of claims 1 to 9. The door panel assembly has a door panel hinge disposed in the water washing tank, and the opening of the water washing tank can be closed or opened by rotating the door panel.

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