Damping structure for a washing machine and washing machine

Abstract

The utility model relates to a damping structure and cleaning machine for cleaning machine, include: base, connect on the box of cleaning machine, cam arm, lower end rotation is connected on the base, the upper end is connected in the door body, cam arm inside hollow forms the installation cavity, and this installation cavity has the cooperation assembly that can provide damping under the door closing state, eliminate the damping under the door opening state inbuiltly, the utility model discloses the cooperation assembly for providing damping is directly inbuilt installation in the inner chamber of cam arm, not only convenient installation, also control the height of camshaft and damping structure conveniently, thereby improve more reliable damping effect, utilize the first piston, second piston and the piston ring arranged at the interval between the both and realize medium exchange, when closing the door, the small medium flow area, will provide greater damping effect, when opening the door, the big medium flow area, do not provide damping, like this user only needs to overcome the door body gravity and realizes the opening of the door, reduce the opening force, to improve the user experience.

Description

Technical Field

[0001] This utility model relates to the field of top-opening dishwasher technology, specifically to a damping structure for a cleaning machine and a cleaning machine. Background Technology

[0002] For top-loading dishwashers, such as sink-type dishwashers, damping is typically required when opening and closing the door. To address this need, the applicant's prior patent ZL 202323019743.7, "Damping Hinge Mechanism and Door Box Device," provides a damping structure. This damping hinge mechanism includes: a hinge base comprising a mounting frame and a sliding shaft disposed on the mounting frame; a hinge bracket rotatably connected to the mounting frame and having a slide rail slidably connected to the sliding shaft and a mounting cavity communicating with the slide rail; and a damping structure installed within the mounting cavity, such that the hinge bracket acts as a damper housing. The damping mechanism includes a damping element and a linkage element disposed within the mounting cavity. One end of the linkage element is connected to the sliding shaft, and the other end is connected to the damping element. When the hinge bracket rotates relative to the mounting frame, causing the sliding shaft to slide along the slide rail, the sliding shaft drives the linkage element to act on the damping element, causing the damping element to generate a damping force.

[0003] While the above solution can provide damping when opening and closing the door, its damping structure uses an existing pre-made damper. During installation, the damper needs to be assembled into the hinge bracket, which is not only inconvenient to install, but also makes the overall damping structure tall and difficult to control. Furthermore, the existing damping component provides damping in both the opening and closing states. However, when the door is open, the door itself has a large weight, and adding damping would require the user to exert more force to open the door, affecting the user experience. Utility Model Content

[0004] The first technical problem this invention aims to solve is to provide a damping structure for a cleaning machine that is easy to install and control in terms of height, reduces the opening force, and thus improves the user experience, in light of the current state of the technology.

[0005] The second technical problem to be solved by this utility model is to provide a cleaning machine with the above-mentioned damping structure, in view of the current state of the prior art.

[0006] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0007] A damping structure for a cleaning machine, comprising:

[0008] The base is connected to the housing of the cleaning machine;

[0009] The lower end of the cam arm is rotatably connected to the base, and the upper end is connected to the door body;

[0010] The cam arm has a hollow interior forming a mounting cavity, which contains a mating component that provides damping when the door is closed and eliminates damping when the door is open.

[0011] This invention directly integrates the damping component into the inner cavity of the cam arm, which not only facilitates installation but also allows for easy control of the height of the camshaft and damping structure, thereby improving the damping effect. The damping component utilizes a first piston, a second piston, and a piston ring positioned between them, arranged at intervals, to achieve medium exchange. When closing the door, the medium flow area is small, providing a greater damping effect, while when opening the door, the medium flow area is large, providing no damping. This allows the user to overcome the weight of the door to open it, reducing the opening force and improving the user experience.

[0012] In this utility model, the mating components include:

[0013] A sealing element is located at the lower end of the mounting cavity and closes the mounting cavity;

[0014] A first piston is disposed in the mounting cavity in a way that allows it to move up and down, and a first flow hole is formed between the outer peripheral wall of the first piston and the inner wall of the mounting cavity.

[0015] The second piston is connected below the first piston and forms an accommodating space between them. A second flow hole is formed between the outer peripheral wall of the second piston and the inner wall of the mounting cavity, and the flow area of ​​the second flow hole is larger than that of the first flow hole.

[0016] A piston ring is disposed in the accommodating cavity between the first piston and the second piston. Moving it downward can block the second flow hole, and moving it upward can open the second flow hole. The flow area corresponding to the gap between the outer surface of the piston ring and the inner wall of the mounting cavity is smaller than the flow area corresponding to the gap between the inner surface of the piston and the second piston.

[0017] The shaft has its upper end connected to the second piston and its lower end passing through a seal and communicating with the base.

[0018] An elastic element is disposed in the mounting cavity and located above the first piston, so that the first piston always maintains a downward tendency;

[0019] The first piston and the second piston divide the mounting cavity into an upper cavity and a lower cavity that are relatively independent. The mounting cavity is provided with a medium that can be exchanged between the upper cavity and the lower cavity through the piston rings of the first piston and the second piston.

[0020] The medium mentioned above can be oil. The above structure is used to achieve the effect of providing damping when closing the door and eliminating damping when opening the door.

[0021] Preferably, the lower end of the cam arm is rotatably connected to the base via a laterally arranged pin, and the lower end of the pin is provided with a cap that abuts against the upper surface of the pin. This structure transmits the force of the pin through the cap, thus achieving a damping effect.

[0022] Preferably, the base has upwardly extending connecting plates on both sides, and the side wall of the cam arm has an elongated hole extending vertically. The pin passes through the elongated hole and its two ends are rotatably connected to the corresponding connecting plates. It also includes a cantilever, the upper end of which is rotatably connected to the side wall of the cam arm located above the elongated hole, and the lower end of which is rotatably connected to the connecting plate located above the pin. This structure achieves a damping effect on the pin as the cam arm rotates.

[0023] Preferably, the cantilever is formed as a rearwardly arched arc-shaped structure, and a limiting protrusion is arranged in the recess corresponding to the arc-shaped structure, which can cooperate with the recess for limiting. With this structure, the limiting protrusion and the cantilever mutually limit each other, so as to limit the rotation angle of the cam arm by means of the limiting protrusion.

[0024] Preferably, the lower surface of the first piston is provided with a socket, and correspondingly, the upper surface of the second piston is provided with a plug-in shaft that can be inserted into the socket. The piston ring is sleeved on the outer circumference of the plug-in shaft, and the inner diameter of the piston ring is larger than the outer diameter of the plug-in shaft. This structure forms internal and external flow channels for the medium, with the piston ring acting as an intermediary. When the valve is closed, the medium flows through the external channel, generating damping; when the valve is opened, the medium flows through the internal channel, generating no damping.

[0025] Preferably, the outer surface of the piston ring is close to the inner circumferential wall of the mounting cavity, and the upper surface of the piston ring is provided with a protrusion that abuts against the lower surface of the first piston to prevent it from blocking the first flow hole. This structure can prevent the first flow hole from being blocked, while allowing the piston ring to descend and temporarily block the second flow hole.

[0026] To improve the reliability of piston movement, the upper end of the shaft is inserted into the lower end face of the second piston, and a gasket with an outer diameter smaller than the diameter corresponding to the inner end of the second flow hole is provided between the shaft and the second piston.

[0027] A cleaning machine includes a water tank body and a door body. The door body is rotatably connected to the edge of the top opening of the water tank body. The machine also includes the aforementioned damping structure. The bottom of the base is locked to the top of the water tank body. The upper part of the cam arm extends from the edge of the door body into the door body and is limited and connected to the cam hole at the upper end of the cam arm by screws.

[0028] Using the damping structure of this invention, in the initial state (door open), due to the elastic force of the elastic element, one end of the cap abuts against the pin, and the other end of the elastic element presses against the inner wall of the cam arm, ensuring the stability of the damping structure. When the cam is subjected to the closing force, the cam arm rotates, the pin presses against the cap, and drives the shaft and the washer on the shaft, pushing the second piston and the first piston to move towards the upper half of the inner cavity of the cam arm. At this time, one side of the piston ring is in close contact with the upper end face of the second piston. The damping oil in the upper half of the cam arm cavity passes through the gap between the first piston and the inner wall of the mounting cavity, the gap between the piston ring and the inner wall of the mounting cavity (this gap is extremely small, and the size of the gap can affect the damping value), and then through the gap between the second piston, the washer, and the inner wall of the mounting cavity, entering... The damping effect is achieved in the lower half of the cavity during closing. When opening, the elastic element gradually expands, pushing the first and second pistons towards the lower half of the mounting cavity wall. At this time, the damping oil flows from the lower half to the upper half. The piston ring is tightly attached to the end face of the first piston. The damping oil then passes through the gap between the gasket, the second piston, and the mounting cavity wall (this gap is much larger than the gap between the outer wall of the piston ring and the mounting cavity wall), then through the gap between the inner wall of the piston ring and the second piston (this gap is also much larger than the gap between the outer wall of the piston ring and the mounting cavity wall), and finally flows into the upper half through the gap between the first piston and the mounting cavity wall. This process has no damping effect. The above process achieves a damping effect when closing the door and no damping effect when opening the door.

[0029] Compared with the prior art, the advantages of this utility model are as follows: This utility model directly integrates the damping component into the inner cavity of the cam arm, which not only facilitates installation but also makes it easy to control the height of the camshaft and damping structure, thereby improving the damping effect. The damping component of this utility model uses a first piston, a second piston, and a piston ring arranged at intervals to achieve medium exchange. When closing the door, the medium flow area is small, which provides a greater damping effect. When opening the door, the medium flow area is large, and no damping is provided. In this way, the user only needs to overcome the weight of the door to open the door, reducing the opening force and improving the user experience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the damping structure according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A sectional view;

[0032] Figure 3 for Figure 1 Exploded view;

[0033] Figure 4 This is a schematic diagram of the cleaning machine in an embodiment of the present invention;

[0034] Figure 5 for Figure 4 A sectional view. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figures 1-5 As shown, the damping structure A for the cleaning machine in this embodiment includes:

[0037] The base 1 is connected to the housing 10 of the cleaning machine;

[0038] Cam arm 2, the lower end is rotatably connected to base 1, and the upper end is connected to door body 20;

[0039] The cam arm 2 has a hollow interior forming a mounting cavity 21, which contains a mating component 3 that provides damping when the door is closed and eliminates damping when the door is open.

[0040] In this embodiment, the damping component 3 is directly built into the inner cavity of the cam arm 2, which not only facilitates installation but also makes it easy to control the height of the camshaft and damping structure, thereby improving the damping effect. The damping component 3 in this embodiment uses the spaced first piston 31, second piston 32 and piston ring 33 between them to realize the exchange of media. When closing the door, the medium flow area is small, which provides a greater damping effect. When opening the door, the medium flow area is large, which does not provide damping. In this way, the user only needs to overcome the gravity of the door body 20 to open the door, reducing the opening force and improving the user experience.

[0041] In this embodiment, the mating component 3 includes:

[0042] A sealing element 34 is provided at the lower end of the mounting cavity 21 and closes the mounting cavity 21;

[0043] The first piston 31 is disposed in the mounting cavity 21 in a way that allows it to move up and down. A first flow hole 311 is formed between the outer peripheral wall of the first piston 31 and the inner wall of the mounting cavity 21.

[0044] The second piston 32 is connected below the first piston 31 and forms an accommodating space between them. A second flow hole 321 is formed between the outer peripheral wall of the second piston 32 and the inner wall surface of the mounting cavity 21, and the flow area of ​​the second flow hole 321 is larger than that of the first flow hole 311.

[0045] The piston ring 33 is located in the accommodating cavity 331 between the first piston 31 and the second piston 32. It can block the second flow hole 321 when it moves downward and open the second flow hole 321 when it moves upward. The flow area corresponding to the gap between the outer surface of the piston ring 33 and the inner wall of the mounting cavity 21 is smaller than the flow area corresponding to the gap between the inner surface of the piston and the second piston 32.

[0046] Shaft 35, the upper end of which is connected to the second piston 32, and the lower end of which passes through the seal 34 and is connected to the base 1;

[0047] The elastic element 36 is disposed in the mounting cavity 21 and located above the first piston 31, so that the first piston 31 always maintains a downward moving tendency.

[0048] The first piston 31 and the second piston 32 divide the mounting cavity 21 into an upper cavity and a lower cavity that are relatively independent. The mounting cavity 21 is provided with a medium that can be exchanged between the upper cavity and the lower cavity through the first piston 31, the second piston 32 and the piston ring 33.

[0049] The medium mentioned above can be oil. The above structure is used to achieve the effect of providing damping when closing the door and eliminating damping when opening the door.

[0050] The lower end of the cam arm 2 is rotatably connected to the base 1 via a transversely arranged pin 5, and the lower end of the shaft 35 is provided with a cap 351 that abuts against the upper surface of the pin 5. This structure transmits force to the pin 5 through the cap 351, thus achieving a damping effect.

[0051] The base 1 has upwardly extending connecting plates 11 on both sides. The side wall of the cam arm 2 has an elongated hole 22 extending vertically. The pin 5 passes through the elongated hole 22 and its two ends are rotatably connected to the corresponding connecting plates 11. It also includes a cantilever 6. The upper end of the cantilever 6 is rotatably connected to the side wall of the cam arm 2 located above the elongated hole 22, and the lower end of the cantilever 6 is rotatably connected to the connecting plate 11 located above the pin 5. This structure achieves a damping effect on the pin 5 as the cam arm 2 rotates.

[0052] The cantilever 6 is formed into a rearward arched arc structure. The front sidewall of the cam arm 2 extends to the side to form a corresponding arched recess, and a limiting protrusion 23 is arranged thereto, which can cooperate with the recess for limiting. With this structure, the limiting protrusion 23 and the cantilever 6 limit each other, so as to limit the rotation angle of the cam arm 2 by limiting the limiting protrusion 23.

[0053] The lower surface of the first piston 31 is provided with a socket, and correspondingly, the upper surface of the second piston 32 is provided with a plug-in shaft 322 that can be inserted into the socket. The piston ring 33 is sleeved on the outer circumference of the plug-in shaft, and the inner diameter of the piston ring 33 is larger than the outer diameter of the plug-in shaft. With the above structure, a medium flow channel with the piston ring 33 as the intermediate component is formed. When the door is closed, the medium flows through the outer channel, generating damping; when the door is opened, the medium flows through the inner channel, generating no damping.

[0054] The outer surface of the piston ring 33 is close to the inner circumferential wall of the mounting cavity 21. The upper surface of the piston ring 33 is provided with a protrusion 332 that abuts against the lower surface of the first piston 31, thereby preventing it from blocking the first flow hole 311. This structure can prevent the first flow hole from being blocked, while allowing the piston ring 33 to descend and temporarily block the second flow hole 321.

[0055] To improve the reliability of piston movement, the upper end of the shaft is inserted into the lower end face of the second piston 32, and a gasket 37 with an outer diameter smaller than the diameter corresponding to the inner end of the second flow hole 321 is provided between the shaft and the second piston 32.

[0056] A cleaning machine includes a water tank body (i.e., the aforementioned box body), a door body 20, the door body 20 being rotatably connected to the edge of the top opening of the water tank body, and also includes the aforementioned damping structure A. The bottom of the base 1 is locked to the top of the water tank body, and the upper part of the cam arm 2 extends from the edge of the door body 20 into the door body 20 and is limited and connected to the cam hole 25 at the upper end of the cam arm 2 by screws.

[0057] Using the damping structure of this embodiment, in the initial state (door 20 open state), due to the elastic force of the elastic element 36, one end of the cap 351 abuts against the pin 5, and the other end of the elastic element 36 abuts against the inner wall of the cam arm 2, ensuring the stability of the damping structure. When the cam is subjected to the closing force, the cam arm 2 rotates, the pin 5 presses against the cap 351, and drives the shaft and the washer 37 on the shaft to push the second piston 32 and the first piston 31 to move towards the upper half of the inner cavity of the cam arm 2. At this time, one side of the piston ring 33 is in close contact with the upper end face of the second piston 32. The damping oil in the upper half of the cam arm 2 passes through the gap between the first piston 31 and the inner wall of the mounting cavity 21, the gap between the piston ring 33 and the inner wall of the mounting cavity 21 (this gap is extremely small, and the size of the gap can affect the damping value), and then through the gap between the second piston 32, the washer 37 and the inner wall of the mounting cavity 21. The damping oil enters the lower cavity, achieving a damping effect during the closing process. When the door opens, the elastic element 36 gradually expands, pushing the first piston 31 and the second piston 32 towards the lower half of the inner wall of the mounting cavity 21. At this time, the damping oil flows from the lower half to the upper half. The piston ring 33 is tightly attached to the end face of the first piston 31. At this time, the damping oil passes through the gap between the gasket 37, the second piston 32 and the inner wall of the mounting cavity 21 (this gap is much larger than the gap between the outer wall of the piston ring 33 and the inner wall of the mounting cavity 21), then through the gap between the inner wall of the piston ring 33 and the second piston 32 (this gap is also much larger than the gap between the outer wall of the piston ring 33 and the inner wall of the mounting cavity 21), and then flows into the upper half from the gap between the first piston 31 and the inner wall of the mounting cavity 21. This process has no damping effect. The above process achieves a damping effect when closing the door and no damping effect when opening the door.

[0058] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A damping structure for a cleaning machine, comprising: The base (1) is connected to the housing (10) of the cleaning machine; The lower end of the cam arm (2) is rotatably connected to the base (1), and the upper end is connected to the door body (20); The feature is that the cam arm (2) has a hollow interior forming a mounting cavity (21), and the mounting cavity (21) contains a mating component (3) that can provide damping in the closed state and eliminate damping in the open state.

2. The damping structure for a cleaning machine according to claim 1, characterized in that: The mating component (3) includes A sealing element (34) is provided at the lower end of the mounting cavity (21) and closes the mounting cavity (21); The first piston (31) is disposed in the mounting cavity (21) and can move up and down. A first flow hole (311) is formed between the outer peripheral wall of the first piston (31) and the inner wall of the mounting cavity (21). The second piston (32) is connected below the first piston (31) and forms an accommodating space between the second piston (31). A second flow hole (321) is formed between the outer peripheral wall of the second piston (32) and the inner wall surface of the mounting cavity (21). The piston ring (33) is located in the accommodating cavity between the first piston (31) and the second piston (32). Moving downwards can block the second flow hole (321), and moving upwards can open the second flow hole (321). The flow area corresponding to the gap between the outer surface of the piston ring (33) and the inner wall of the mounting cavity (21) is smaller than the flow area corresponding to the gap between the inner surface of the piston and the second piston (32). The shaft is connected at its upper end to the second piston (32) and at its lower end to the base (1) through the seal (34); An elastic element (36) is provided in the mounting cavity (21) and located above the first piston (31), so that the first piston (31) always maintains a downward movement tendency; The first piston (31) and the second piston (32) divide the mounting cavity (21) into an upper cavity and a lower cavity that are relatively independent. The mounting cavity (21) is provided with a medium that can be exchanged between the upper cavity and the lower cavity through the first piston (31), the second piston (32) and the piston ring (33).

3. The damping structure for a cleaning machine according to claim 2, characterized in that: The lower end of the cam arm (2) is rotatably connected to the base (1) by a horizontally arranged pin (5), and the lower end of the pin is provided with a cap (351) that can abut against the upper surface of the pin (5).

4. The damping structure for a cleaning machine according to claim 3, characterized in that: The base (1) has upwardly extending connecting plates (11) on both sides. The side wall of the cam arm (2) has an elongated hole (22) extending vertically. The pin (5) passes through the elongated hole (22) and is rotatably connected to the corresponding connecting plate (11) at both ends.

5. The damping structure for a cleaning machine according to claim 4, characterized in that: It also includes a cantilever (6), the upper end of which is rotatably connected to the side wall of the cam arm (2) located above the elongated hole (22), and the lower end of which is rotatably connected to the connecting plate (11) located above the pin (5).

6. The damping structure for a cleaning machine according to claim 5, characterized in that: The cantilever (6) is formed into an arc-shaped structure that arches backward. The front sidewall of the cam arm (2) extends to the side to form a corresponding arc-shaped structure recess, and a limiting protrusion (23) is arranged to cooperate with the recess for limiting.

7. The damping structure for a cleaning machine according to any one of claims 2 to 6, characterized in that: The lower surface of the first piston (31) is provided with a socket, and correspondingly, the upper surface of the second piston (32) is provided with a plug shaft that can be inserted into the socket. The piston ring (33) is sleeved on the outer circumference of the plug shaft, and the inner diameter of the piston ring (33) is larger than the outer diameter of the plug shaft.

8. The damping structure for a cleaning machine according to claim 7, characterized in that: The outer surface of the piston ring (33) is close to the inner circumferential wall of the mounting cavity (21), and the upper surface of the piston ring (33) is provided with a protrusion that can abut against the lower surface of the first piston (31) to prevent it from blocking the first flow hole (311).

9. The damping structure for a cleaning machine according to any one of claims 2 to 6, characterized in that: The upper end of the shaft is inserted into the lower end face of the second piston (32), and a gasket (37) with an outer diameter smaller than the inner diameter of the second flow hole (321) is provided between the shaft and the second piston (32).

10. A cleaning machine, comprising a water tank body and a door (20), wherein the door (20) is rotatably connected to the edge of the open top of the water tank body, characterized in that: It also includes a damping structure according to any one of claims 1 to 9, wherein the bottom of the base (1) is locked to the top of the water tank body, and the upper part of the cam arm (2) extends from the edge of the door body (20) into the door body (20) and is limitedly connected to the cam hole at the upper end of the cam arm (2) by screws.

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