CN218324651U - Negative pressure sealing device and cleaning robot - Google Patents

Abstract

The utility model relates to the technical field of sealing, and discloses a negative pressure sealing device and a cleaning robot, wherein the negative pressure sealing device comprises a negative pressure cavity, a door body and a sealing assembly; the negative pressure cavity is provided with an opening, the door body is hinged to the negative pressure cavity and can cover the opening; the sealing assembly is arranged on the surface of the door body facing the opening, the sealing assembly can move along the normal direction of the door body, the door body cover is arranged at the opening, and the sealing assembly is connected between the opening and the door body to form sealing. The negative pressure sealing device is convenient to operate, the installation precision between the door body and the negative pressure cavity is high, and other sensors and the like can be installed on the door body.

Description

Negative pressure sealing device and cleaning robot

Technical Field

The disclosure relates to the technical field of sealing, in particular to a negative pressure sealing device and a cleaning robot.

Background

The sealing device of the existing cleaning robot mainly has two types: referring to fig. 1, a sealing device includes a first cavity 101, a first sealing strip 102, a first maintenance door 103, and a floating rotating shaft 104, where the first sealing strip 102 is installed on the first maintenance door 103, the first maintenance door 103 is installed on the floating rotating shaft 104, the first maintenance door 103 can cover a sealing opening of the first cavity 101, and the floating rotating shaft 104 can move toward a direction close to or away from the first cavity 101, so that the floating rotating shaft 104 easily causes a gap between the first maintenance door 103 and the first cavity 101, and affects sealing accuracy of the first maintenance door 103 and the first sealing strip 102. The first maintenance door 103 floats along with the floating shaft 104, and the direction indicated by the double-headed arrow in fig. 1 is the floating direction of the first maintenance door 103. And since the floating rotating shaft 104 drives the first maintenance door 103 to move towards a direction close to or far away from the first cavity 101, if a sensor is installed on the first maintenance door 103, the installation position of the sensor also changes in a floating manner, which affects the detection accuracy of the sensor, and therefore, the sensor and other structures are not convenient to install on the first maintenance door 103.

Referring to fig. 2, another sealing device includes a second cavity 201, a sealing cover 202, a second sealing strip 203, and a second maintenance door 204, wherein the second sealing strip 203 is mounted on the sealing cover 202, and the second maintenance door 204 can be hinged to cover the sealing opening of the second cavity 201. The sealing cover 202 is independent, and when the sealing opening is closed, the sealing cover 202 provided with the second sealing strip 203 is covered on the sealing opening, and then the second maintenance door 204 is covered on the sealing cover 202. Therefore, the operation is inconvenient because of the structure of one more sealing cover 202, and the sealing cover 202 is easily placed in disorder and lost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a negative pressure sealing device and cleaning machines people to solve among the prior art cleaning machines people's sealing device and easily lead to producing the inconvenient technical problem of clearance, second dimension guard gate operation between first dimension guard gate and the first cavity.

In order to solve the technical problem, in a first aspect, the present disclosure provides a negative pressure sealing device, which includes a negative pressure cavity, a door body, and a sealing assembly;

the negative pressure cavity is provided with an opening, the door body is hinged to the negative pressure cavity and can cover the opening;

the sealing assembly is installed the door body orientation the open-ended surface the door body for the negative pressure cavity rotates to cover and establishes the open-ended in-process, sealing assembly can follow the door body normal direction removes, the door body is covered and is established when the opening part, sealing assembly connects the opening with between the door body.

Optionally, seal assembly includes sealing washer and elastic mechanism, elastic mechanism installs the door body orientation open-ended surface, the sealing washer is connected elastic mechanism, the sealing washer can be followed door body normal direction removes, the door body lid is established when the opening part, the sealing washer is connected the opening with between the door body, elastic mechanism compress in the sealing washer with between the door body.

Optionally, the resilient mechanism comprises a resilient element comprising at least one of a spring, a resilient cushion and a resilient air cushion.

Optionally, the elastic mechanism further includes a guide pillar, the guide pillar is installed on a surface of the door body facing the opening, the elastic element is installed on the guide pillar, the elastic element is capable of extending and contracting along an axial direction of the guide pillar, the sealing ring is installed on the elastic element, and the sealing ring is capable of moving along the axial direction of the guide pillar.

Optionally, the negative pressure sealing device further comprises a locking assembly, the locking assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is installed on the negative pressure cavity, the second connecting piece is installed on the door body, and the first connecting piece and the second connecting piece can be detachably connected.

Optionally, the opening is a stepped hole, the opening includes a first hole and a second hole which are sequentially communicated, the first hole is a through hole, the diameter of the first hole is larger than that of the second hole, a step is formed between the first hole and the second hole, and the first hole is closer to the door body relative to the second hole;

the door body comprises a door body and a convex block, the convex block is arranged on one surface, facing the first hole, of the door body, the sealing ring is arranged on the convex block, when the door body is covered at the opening, the convex block is located in the first hole, the convex block abuts against the side wall of the first hole, the door body abuts against the end face of the negative pressure cavity, and the sealing ring abuts against the step.

Optionally, the negative pressure sealing device further comprises a hinge, and the door body is hinged to the negative pressure cavity through the hinge;

the negative pressure cavity is provided with a mounting groove, the mounting groove extends to the first hole and is communicated with the first hole, and the hinged part is mounted in the mounting groove.

Optionally, the mounting groove comprises a groove side wall;

the articulated elements includes first connecting rod, second connecting rod, third connecting rod and fourth connecting rod, the one end of first connecting rod with the one end of second connecting rod is articulated respectively and is connected on the door body, the other end of first connecting rod with the one end of third connecting rod is articulated links to each other, the other end of second connecting rod is articulated to be connected the middle part of third connecting rod, the one end of fourth connecting rod is articulated to be connected the middle part of second connecting rod, the other end of third connecting rod with the other end of fourth connecting rod is articulated respectively and is connected on the groove lateral wall.

Optionally, the third link is curved, and the third link is curved in a direction away from the second link.

In a second aspect, the present disclosure also provides a cleaning robot, which includes the above negative pressure sealing device.

Compared with the prior art, in the negative pressure sealing device, the negative pressure cavity and the door body are hinged and connected, the door body and the negative pressure cavity can only rotate relatively, and the door body and the negative pressure cavity cannot move linearly relatively, so that a gap cannot be generated between the door body and the negative pressure cavity basically, the installation precision between the door body and the negative pressure cavity is high, and other sensors can be installed on the door body.

In the negative pressure sealing device of this disclosure, seal assembly installs on the door body, when the door body rotates, seal assembly rotates along with the synchronization, so convenient operation, the indiscriminate pendulum can not appear and indiscriminate phenomenon of putting and seal assembly loses, and because the relative rotation between the door body and the negative pressure cavity, can produce spacing effect, when the door body lid is at the opening part of negative pressure cavity, seal assembly can connect between the door body and opening, and because seal assembly can follow a body normal direction and remove, easily aim at between the door body and the negative pressure cavity, be difficult for producing the clearance, it is sealed effectual. The normal direction of the door body refers to the direction perpendicular to the panel surface of the door body.

In some electric rice cookers, the electric rice cooker produces positive pressure, so if some sealing rings are arranged, the elastic acting force produced by the sealing rings is required to be greater than the pressure of the electric rice cooker during steam leakage, and the sealing rings can be ensured to realize good sealing. The negative pressure cavity in the negative pressure sealing device disclosed by the invention provides negative pressure, and the limitation is not needed, the negative pressure cavity can adsorb the door body, and the door body can be sealed at the opening, so that the negative pressure sealing device disclosed by the invention has substantial differences from structures in the fields of electric cookers and the like.

The cleaning robot of the present disclosure also has the above advantages, which are not described in detail herein.

Drawings

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

FIG. 1 is a schematic view of a sealing device in the prior art;

FIG. 2 is a schematic view of another sealing device of the prior art;

FIG. 3 is a schematic diagram illustrating a first perspective view of a negative pressure sealing device according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating a second view of the negative pressure sealing device according to an embodiment of the present disclosure;

FIG. 5 is an enlarged schematic view of FIG. 4 at section A;

FIG. 6 is a schematic diagram illustrating a third view of the negative pressure sealing device according to an embodiment of the present disclosure;

fig. 7 is an enlarged schematic view of fig. 4 at the labeled part B.

Detailed Description

In order to facilitate an understanding of the disclosure, the disclosure is described in more detail below with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, 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 disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms first, second, third and the like in the description and in the claims, are used for descriptive purposes only to distinguish one element from another, and are not to be construed as indicating or implying relative importance or implying any order or order to the indicated elements. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Similarly, the terms "fixed" and "connected," as used in the description and claims, are not intended to be limited to a direct connection. Thus, the expression "device a is connected to device B" should not be limited to devices or systems in which device a is directly connected to device B, which means that there is a path between device a and device B, which may be a path including other devices or tools.

In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 3, a negative pressure sealing device 100 includes a negative pressure chamber 10, a door 20 and a sealing assembly 30; an opening 12 is formed in the negative pressure cavity 10, the door body 20 is hinged to the negative pressure cavity 10, and the door body 20 can cover the opening 12; the sealing assembly 30 is installed on a surface of the door body 20 facing the opening 12, the sealing assembly 30 can move along a normal direction of the door body 20, and when the door body 20 is covered at the opening 12, the sealing assembly 30 is connected between the opening 12 and the door body 20 to form a seal.

In the negative pressure sealing device 100 of this embodiment, the negative pressure cavity 10 is hinged to the door body 20, the door body 20 and the negative pressure cavity 10 can only rotate relatively, and no relative linear movement can be generated between the door body 20 and the negative pressure cavity 10, so that no gap is generated between the door body 20 and the negative pressure cavity 10, the installation accuracy between the door body 20 and the negative pressure cavity 10 is high, and when the door body 20 rotates to a preset angle or covers the negative pressure cavity 10, no relative linear movement can be generated between the door body 20 and the negative pressure cavity 10, so that when a sensor is installed on the door body 20, the position of the sensor cannot change, and the detection accuracy of the sensor cannot be affected.

In the negative pressure sealing device 100 of this embodiment, seal assembly 30 is installed on door body 20, when door body 20 rotates, seal assembly 30 is along with synchronous rotation, so convenient operation, the indiscriminate phenomenon of putting and seal assembly 30 loses of pendulum can not appear, and because the relative rotation between door body 20 and the negative pressure cavity 10, can produce spacing effect, when door body 20 lid is in the opening 12 department of negative pressure cavity 10, seal assembly 30 can connect between door body 20 and opening 12, and because seal assembly 30 can follow door body 20 normal direction and remove, easily aim at between door body 20 and the negative pressure cavity 10, be difficult for producing the clearance, it is sealed effectual. The normal direction of the door body 20 refers to a direction perpendicular to the panel surface of the door body 20.

In some electric rice cookers, the electric rice cooker produces the malleation, consequently, if when will set up some sealing washers, must guarantee that the elastic force that the sealing washer produced is greater than the pressure when electric rice cooker steam leaked, just can guarantee that the sealing washer realizes good sealed. The negative pressure cavity 10 in the negative pressure sealing device 100 in this embodiment provides negative pressure, and the negative pressure cavity 10 can adsorb the door 20, and the door 20 can close the opening 12, and the sealing effect is good, so that the negative pressure sealing device 100 in this embodiment has substantial differences from structures in the fields of electric cookers and the like.

In an embodiment, the negative pressure sealing device 100 further includes a hinge 40, and the door body 20 is hinged to the negative pressure chamber 10 through the hinge 40. Specifically, the hinge 40 may be a door hinge, a pin, a damping hinge, or other connecting members that enable the door 20 and the negative pressure chamber 10 to be connected in a hinged manner. Wherein, the door hinge is also called hinge. When the hinge member 40 is a pin shaft, the pin shaft is installed on one of the door body 20 and the negative pressure cavity 10, the other of the door body 20 or the negative pressure cavity 10 is provided with a pin hole, the pin hole is sleeved on the pin shaft, and the pin hole can rotate relative to the pin shaft. The damping hinge comprises a damping spring, and when the door body 20 and the negative pressure cavity 10 rotate relatively, a damping effect can be generated, the door body 20 is supported, and the acting force for pushing the door body 20 is reduced. The negative pressure cavity 10 and the door body 20 can rotate relatively through the hinge 40, so that the door body 20 can cover the opening 12 of the negative pressure cavity 10, and the door body 20 can be separated from the opening 12 of the negative pressure cavity 10.

Referring to fig. 4 and 5, in an embodiment, the sealing assembly 30 includes a sealing ring 32 and an elastic mechanism 34, the elastic mechanism 34 is mounted on a surface of the door body 20 facing the opening 12, the sealing ring 32 can move along a normal direction of the door body 20, when the door body 20 is covered at the opening 12, the sealing ring 32 is connected between the opening 12 and the door body 20, and the elastic mechanism 34 is compressed between the sealing ring 32 and the door body 20. The sealing ring 32 mainly plays a role in sealing, the elastic mechanism 34 can enable the sealing ring 32 to move normally relative to the door body 20, and when the door body 20 covers the opening 12 of the negative pressure cavity 10, the elastic mechanism 34 can be elastically compressed, so that the sealing ring 32 is gradually and hermetically connected between the door body 20 and the negative pressure cavity 10, and the sealing effect of the sealing ring 32 is better. The shape of the sealing ring 32 is matched with that of the opening 12, and the sealing ring 32 can be sleeved outside the opening 12 to seal between the door body 20 and the negative pressure cavity 10. The sealing ring 32 may be a closed ring or an open ring, wherein the ring may be a square ring or a circular ring, etc. The sealing ring 32 may be made of a flexible material, that is, the sealing ring 32 has elasticity, so that the sealing effect of the sealing ring 32 is better. Specifically, the sealing ring 32 may be made of elastic rubber or the like.

It will be appreciated that when the elasticity of the sealing ring 32 is sufficient, in some embodiments, the resilient mechanism 34 may be omitted.

In one embodiment, the resilient mechanism 34 includes a resilient element 342, and the resilient element 342 includes at least one of a spring, a resilient cushion, and a resilient air spring. When the elastic element 342 is a spring, one end of the spring is connected to the sealing ring 32, and the other end of the spring is connected to the door 20, and when the door 20 covers the negative pressure cavity 10, the spring can be compressed, and the sealing ring 32 is gradually and hermetically connected between the door 20 and the negative pressure cavity 10. When the door body 20 and the negative pressure cavity 10 are separated from each other, the spring extends, and the sealing ring 32 returns to the initial state under the action of the spring. In a specific embodiment, the number of springs is four, and the four springs are evenly distributed along the circumference of the seal ring 32.

When the elastic element 342 is an elastic cushion or an elastic cushion, the elastic cushion or the elastic cushion is connected between the sealing ring 32 and the negative pressure chamber 10, and the elastic cushion or the elastic cushion may be a block structure. The elastic cushion or the elastic cushion can enable the sealing ring 32 to move along the normal direction relative to the door body 20, and when the door body 20 covers the opening 12 of the negative pressure cavity 10, the elastic cushion or the elastic cushion can be elastically compressed, so that the sealing effect of the sealing ring 32 is better.

It will be appreciated that in some embodiments, the resilient cushion or cushions may be omitted when the gasket 32 itself is sufficiently resilient that the gasket 32 can move normal to the door body 20.

In one embodiment, the elastic mechanism 34 further includes a guide post 344, the guide post 344 is mounted on a surface of the door body 20 facing the opening 12, the elastic element 342 is mounted on the guide post 344, the elastic element 342 is capable of extending and contracting along the axial direction of the guide post 344, the sealing ring 32 is mounted on the elastic element 342, and the sealing ring 32 is capable of moving along the axial direction of the guide post 344 relative to the guide post 344. The guide post 344 has guiding and limiting functions, so that the elastic element 342 extends and retracts along the axial direction of the guide post 344, the elastic element 342 is prevented from being separated from a predetermined track, the elastic element 342 is prevented from being damaged, and the service life of the elastic element 342 can be prolonged. When the elastic element 342 is a spring, the spring is sleeved on the guide post 344, and the number of the spring and the number of the guide post 344 are four respectively, so that each part of the sealing ring 32 can synchronously move along the guide post 344. When the elastic element 342 is an elastic soft pad or an elastic cushion, the elastic soft pad or the elastic cushion is respectively provided with a guide hole, the elastic soft pad or the elastic cushion is respectively sleeved on the guide post 344 through the guide hole, and the guide post 344 also has a guiding function on the elastic cushion or the elastic cushion. In particular, the elastic cushion can be made of a flexible material, for example, the elastic cushion can be made of elastic rubber.

In some electric cookers, the electric cooker generates positive pressure, so if the spring, the guide post and the sealing ring 32 of the present embodiment are to be arranged, the elastic force generated by the spring must be greater than the pressure of the electric cooker during steam leakage, and the sealing ring can be ensured to realize good sealing. The negative pressure cavity 10 in the negative pressure sealing device 100 in this embodiment provides negative pressure, and the negative pressure cavity 10 can adsorb the door 20 and the door 20 can close the opening 12 without the above limitation, so the negative pressure sealing device 100 in this embodiment is substantially different from the structures in the field of electric cookers and the like, and has significant progress.

Referring to fig. 6, in an embodiment, the negative pressure sealing device 100 further includes a latch assembly 50, and when the door 20 is covered at the opening 12, the door 20 and the negative pressure cavity 10 are locked and connected by the latch assembly 50; when the door body 20 and the opening 12 are separated from each other, the latch assembly 50 can unlock the door body 20 and the negative pressure cavity 10. When the door body 20 covers the negative pressure cavity 10, the lock catch assembly 50 can lock the door body 20 and the negative pressure cavity 10, the door body 20 and the negative pressure cavity 10 are prevented from being accidentally separated, when the door body 20 and the negative pressure cavity 10 are required to be separated, the lock catch assembly 50 is opened, the door body 20 and the negative pressure cavity 10 can be unlocked, the operation is convenient, and the door body 20 and the negative pressure cavity 10 can be accidentally separated.

In an embodiment, the latch assembly 50 includes a first connector 52 and a second connector 54, the first connector 52 is mounted on the negative pressure chamber 10, the second connector 54 is mounted on the door 20, and the first connector 52 and the second connector 54 can be detachably connected. Through the detachable connection of the first connecting piece 52 and the second connecting piece 54, the locking and unlocking between the door body 20 and the negative pressure cavity 10 can be realized, and the door body locking device is convenient to operate, safe and reliable.

In one embodiment, the first connector 52 includes a first magnetic member, and the second connector 54 includes a second magnetic member, wherein the first magnetic member and the second magnetic member are capable of attracting each other. The first magnetic part and the second magnetic part are respectively magnets, the N pole of one magnet is opposite to the S pole of the other magnet, and when the door body 20 is close to the negative pressure cavity 10, the two magnets can attract each other to lock the door body 20 and the negative pressure cavity 10.

In an embodiment, one of the first magnetic member and the second magnetic member is a magnet, and the other of the first magnetic member and the second magnetic member is a metal member such as nickel-iron-cobalt that can be attracted by the magnet, so that when the door body 20 and the negative pressure chamber 10 are close to each other, the first magnetic member and the second magnetic member can be attracted to each other to lock the door body 20 and the negative pressure chamber 10.

In some embodiments, the number of the first magnetic members and the number of the second magnetic members are four, each of the first magnetic members and the second magnetic members corresponds to one another, one of the first magnetic members and the second magnetic members is uniformly distributed along the circumferential direction of the sealing ring 32, and the other of the first magnetic members and the second magnetic members is mounted on the negative pressure chamber 10.

In one embodiment, the first connector 52 and the second connector 54 are snap-fit. That is, the first connector 52 and the second connector 54 are mechanically connected to each other to form a snap-fit connection. Specifically, the locking assembly 50 is an elastic bolt, a cabinet lock, a slot type spherical buckle, and the like, and the elastic bolt, the cabinet lock, and the slot type spherical buckle respectively include a first connecting piece 52 and a second connecting piece 54, so that the door body 20 and the negative pressure cavity 10 can be detachably connected by a buckle.

In an embodiment, the opening 12 is a stepped hole, the opening 12 includes a first hole 122 and a second hole 124 that are sequentially communicated with each other, the first hole 122 is a through hole, a diameter of the first hole 122 is greater than a diameter of the second hole 124, so as to form a step 126 between the first hole 122 and the second hole 124, and the first hole 122 is closer to the door body 20 than the second hole 124.

The door body 20 includes a door body 22 and a protrusion 24, the protrusion 24 is mounted on a surface of the door body 22 facing the first hole 122, and the sealing ring 32 is mounted on the protrusion 24. When the door body 20 covers the opening 12, the protrusion 24 is located in the first hole 122, the protrusion 24 abuts against the side wall of the first hole 122, the first hole 122 has a limiting effect on the protrusion 24, the door body 22 abuts against the end surface of the negative pressure cavity 10, the end surface of the negative pressure cavity 10 can block the door body 22, and the limiting effect is generated on the door body 22. The sealing ring 32 abuts against the step 126, and the step 126 can abut against the sealing ring 32 so that the sealing ring 32 moves along the normal direction of the door body 20. Through the cooperation of the sealing ring 32 and the step 126, the sealing effect between the projection 24 and the inside of the negative pressure cavity 10 is ensured, and the projection 24 is prevented from sinking into the first hole 122 and being unable to be pulled out.

In some embodiments, the negative pressure chamber 10 is further provided with a mounting groove 14, and the mounting groove 14 extends to the first hole 122 and is communicated with the first hole 122. The hinge 40 is installed in the installation groove 14, and the door body 22 rotates relative to the negative pressure chamber 10 through the hinge 40. When the door body 22 covers the negative pressure cavity 10, the butt joint between the door body 22 and the negative pressure cavity 10 is tighter, the gap between the bump 24 and the first hole 122 is smaller, the sealing ring 32 is easier to realize sealing, and the sealing effect is better.

Referring to fig. 7, in one embodiment, the mounting groove 14 includes a groove sidewall 142, and the groove sidewall 142 may be a part of the vacuum chamber 10. The hinge assembly 40 includes a first link 42, a second link 44, a third link 46 and a fourth link 48, wherein one end of the first link 42 and one end of the second link 44 are respectively and pivotally connected to the door body 20, and specifically, one end of the first link 42 and one end of the second link 44 are respectively and pivotally connected to the door body 22. The other end of the first link 42 is hinged to one end of the third link 46, the other end of the second link 44 is hinged to the middle of the third link 46, one end of the fourth link 48 is hinged to the middle of the second link 44, and the other end of the third link 46 and the other end of the fourth link 48 are hinged to the groove side wall 142 respectively.

If the third link 46 is a straight rod, when the door 20 and the opening 12 are separated from each other, the rotation angle of the door body 22 is insufficient, the door body 22 cannot rotate in place, the door body 22 cannot rotate to a position parallel to the slot side wall 12, and a large gap is likely to exist between the door body 22 and the slot side wall 142. When the door 20 is covered at the opening 12, a gap is also easily generated between the door body 22 and the negative pressure cavity 10. In some embodiments, the third link 46 is curved in a direction away from the second link 44, and when the door body 20 and the opening 12 are separated from each other, the door body 22 and the slot side wall 142 are substantially parallel to each other and abut against each other, and a gap between the door body 22 and the slot side wall 142 is smaller. When the door body 20 covers the opening 12, the door body 22 is more easily rotated in place, and the gap between the door body 22 and the negative pressure cavity 10 is smaller, which is beneficial to improving the sealing effect.

A first four-link mechanism is formed between the first link 42, the second link 44, the third link 46 and the door body 22, and a second four-link mechanism is formed between the second link 44, the third link 46, the fourth link 48 and the negative pressure chamber 10. The first four-bar linkage mechanism and the second four-bar linkage mechanism can rotate relatively. When the door body 20 and the opening 12 are separated from each other, the door body 22 and the pocket side wall 142 can be substantially parallel to and butted against each other, and the gap between the door body 22 and the pocket side wall 142 is smaller. When the door body 20 covers the opening 12, the sealing ring 32 abuts against the step 126, the door body 22 covers the groove side wall 142, and a gap between the door body 22 and the groove side wall 142 is smaller, which is more beneficial to ensuring the sealing effect.

In a second aspect, the present embodiment further provides a cleaning robot, including the negative pressure sealing device 100 described above.

The cleaning robot of the present embodiment also has the above advantages, and will not be described herein. In this case, when the negative pressure sealing apparatus 100 of the present embodiment is applied to a cleaning robot, the negative pressure chamber 10 may be a chamber capable of generating negative pressure, such as a sewage tank, a dust tank, or the like.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solutions of the present disclosure, not to limit them; within the idea of the present disclosure, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the present disclosure as described above, which are not provided in detail for the sake of brevity; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in each of the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the scope of the corresponding technical solutions of each embodiment of the present disclosure.

Claims (10)

1. A negative pressure sealing device is characterized by comprising a negative pressure cavity, a door body and a sealing assembly;

the negative pressure cavity is provided with an opening, the door body is hinged to the negative pressure cavity and can cover the opening;

the sealing assembly is arranged on the surface, facing the opening, of the door body, the door body rotates relative to the negative pressure cavity to cover the opening, the sealing assembly can move normally along the door body, and when the door body covers the opening, the sealing assembly is connected between the opening and the door body.

2. The negative pressure sealing device according to claim 1, wherein the sealing assembly comprises a sealing ring and an elastic mechanism, the elastic mechanism is installed on the surface of the door body facing the opening, the sealing ring is connected with the elastic mechanism, the sealing ring can move along the normal direction of the door body, when the door body is covered at the opening, the sealing ring is connected between the opening and the door body, and the elastic mechanism is compressed between the sealing ring and the door body.

3. The negative pressure sealing device of claim 2, wherein the resilient mechanism comprises a resilient element comprising at least one of a spring, a resilient cushion, and a resilient air cushion.

4. The negative-pressure sealing device as claimed in claim 3, wherein the resilient mechanism further comprises a guide post, the guide post is mounted on a surface of the door body facing the opening, the resilient element is mounted on the guide post, the resilient element is capable of extending and contracting along an axial direction of the guide post, and the sealing ring is mounted on the resilient element, and the sealing ring is capable of moving along the axial direction of the guide post.

5. The negative pressure sealing device as claimed in claim 1, further comprising a locking assembly, wherein the locking assembly comprises a first connecting piece and a second connecting piece, the first connecting piece is mounted on the negative pressure chamber, the second connecting piece is mounted on the door body, and the first connecting piece and the second connecting piece can be detachably connected.

6. The negative pressure sealing device according to claim 2, wherein the opening is a stepped hole, the opening comprises a first hole and a second hole which are communicated in sequence, the first hole is a through hole, the diameter of the first hole is larger than that of the second hole, a step is formed between the first hole and the second hole, and the first hole is closer to the door body relative to the second hole;

the door body comprises a door body and a convex block, the convex block is arranged on one surface, facing the first hole, of the door body, the sealing ring is arranged on the convex block, when the door body is covered at the opening, the convex block is located in the first hole, the convex block abuts against the side wall of the first hole, the door body abuts against the end face of the negative pressure cavity, and the sealing ring abuts against the step.

7. The negative pressure sealing device according to claim 6, further comprising a hinge member, wherein the door body is hinged to the negative pressure cavity through the hinge member;

the negative pressure cavity is provided with a mounting groove, the mounting groove extends to the first hole and is communicated with the first hole, and the hinged part is mounted in the mounting groove.

8. The negative pressure sealing device of claim 7, wherein the mounting groove includes a groove sidewall;

the articulated elements includes first connecting rod, second connecting rod, third connecting rod and fourth connecting rod, the one end of first connecting rod with the one end of second connecting rod is articulated respectively and is connected on the door body, the other end of first connecting rod with the one end of third connecting rod is articulated continuous, the other end of second connecting rod is articulated to be connected the middle part of third connecting rod, the one end of fourth connecting rod is articulated to be connected the middle part of second connecting rod, the other end of third connecting rod with the other end of fourth connecting rod is articulated respectively and is connected on the groove lateral wall.

9. The negative pressure sealing device of claim 8, wherein the third link is curved, the third link being curved in a direction away from the second link.

10. A cleaning robot comprising the negative pressure sealing apparatus of any one of claims 1 to 9.

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