Pressure release valve, cab assembly and vehicle

Abstract

The utility model discloses a pressure release valve, a cab assembly and a vehicle, relates to the technical field of vehicles, and aims to solve the problem of how to relieve water leakage of the pressure release valve. The pressure release valve comprises a shell and a sealing piece, the sealing piece comprises a first sealing part and a second sealing part, and the first sealing part and the second sealing part are both suitable for being arranged between the shell and a to-be-connected piece so as to seal a gap between the to-be-connected piece and the shell. The first sealing part and the second sealing part can form two layers of sealing protection, the sealing strength between the shell and the to-be-connected piece is further improved, and the risk that rainwater flows into a cab through the pressure release valve is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a pressure relief valve, a cab assembly and a vehicle. BACKGROUND

[0002] With the continuous development of vehicle technology, the performance and comfort of vehicles are constantly improving. Because the space of the cab is relatively closed, when the door is closed, the airflow will be squeezed into the cab along with the door, causing the air pressure in the cab to be relatively high, and thus making it difficult to close the door.

[0003] In the prior art, a pressure relief valve that can communicate the air inside and outside the cab is provided in the cab, so that when the door is closed, the air in the cab can be discharged to the outside through the pressure relief valve, thereby balancing the air pressure inside and outside the cab and alleviating the difficulty of closing the door.

[0004] Because the pressure relief valve communicates the air inside and outside the cab, in rainy weather, rainwater may leak into the cab from the outside. In the prior art, a water blocking sleeve can be provided on the pressure relief valve to reduce the entry of rainwater into the cab, but rainwater may still flow into the cab from the connection between the cab and the pressure relief valve. CONTENT OF THE INVENTION

[0005] The present application aims to provide a pressure relief valve, a cab assembly and a vehicle, and aims to solve the problem of how to alleviate the water leakage of the pressure relief valve.

[0006] In a first aspect, the present application provides a pressure relief valve, which comprises a housing and a sealing piece, the sealing piece comprising a first sealing part and a second sealing part, both of which are adapted to be arranged between the housing and a to-be-connected piece to seal the gap between the to-be-connected piece and the housing.

[0007] Both the first sealing part and the second sealing part are adapted to be arranged between the housing and the to-be-connected piece, which can form two layers of sealing protection, further increasing the sealing strength between the housing and the to-be-connected piece, reducing the possibility of water leakage between the housing and the to-be-connected piece into the cab, and thus increasing the comfort and safety of driving.

[0008] Optionally, the housing comprises a main body part and a connecting part, the sealing piece is arranged around the main body part, the connecting part is arranged around the main body part, and the connecting part is in contact with the sealing piece.

[0009] Both the sealing piece and the connecting part are arranged around the main body part, and the sealing piece and the connecting part are in contact, which can form a seal of the sealing piece around the housing, reducing the possibility of rainwater seeping into the cab from the peripheral wall of the housing.

[0010] Optionally, a first ring groove is provided on the connecting part, the sealing piece comprises a limiting part connected with both the first sealing part and the second sealing part, and the limiting part is arranged in the first ring groove.

[0011] Since the limiting portion is arranged in the first annular groove, the first annular groove can position the limiting portion, and then position the sealing member, so that the displacement of the sealing member caused by the vibration of the vehicle can be reduced, and the possibility of the sealing strength between the shell and the to-be-connected member being reduced caused by the displacement of the sealing member can be reduced.

[0012] Optionally, the first sealing portion is arranged on the outer circumferential side of the second sealing portion. In this way, the rainwater first contacts the first sealing portion, and the first sealing portion can protect the second sealing portion, so as to reduce the rainwater entering the second sealing portion, and further reduce the possibility of the pressure relief valve leaking.

[0013] Optionally, the first end of the first sealing portion away from the connecting portion is arranged in a spaced manner with the first end of the second sealing portion away from the connecting portion.

[0014] When the sealing member is installed, the sealing member will generally deform when sealing. Since the first end of the first sealing portion away from the connecting portion is arranged in a spaced manner with the first end of the second sealing portion away from the connecting portion, a deformation space can be formed between the first sealing portion and the second sealing portion, so that the interference between the first sealing portion and the second sealing portion caused by the deformation can be reduced, and the first sealing portion and the second sealing portion can perfectly seal the gap between the shell and the to-be-connected member.

[0015] Optionally, the first end wall of the connecting portion is provided with a first annular groove, the projection of the first end of the first sealing portion away from the connecting portion on the plane of the first end wall is a first projection, the projection of the first end of the second sealing portion away from the connecting portion on the plane of the first end wall is a second projection, and the area of the first projection is smaller than the area of the second projection.

[0016] In this way, the area of the second sealing portion in contact with the to-be-connected member is greater than the area of the first sealing portion in contact with the to-be-connected member, and the sealing effect of the second sealing portion on the gap between the shell and the to-be-connected member is better. If the rainwater leaks from the first sealing portion by mistake, the second sealing portion can also seal the gap between the shell and the to-be-connected member, and the rainwater is not easy to leak into the cab from the second sealing portion.

[0017] Optionally, the first sealing portion comprises a first sealing end and a second sealing end arranged in a spaced manner, the second sealing end is connected with the limiting portion, and the first sealing portion is arranged on the side of the connecting portion away from the main body portion.

[0018] In this way, the first sealing portion is arranged obliquely relative to the axial direction of the sealing member, and gradually approaches the central axis of the sealing member in the direction from the to-be-connected member to the connecting portion. Thus, when rainwater can flow along the first sealing portion from one side of the to-be-connected member to the side of the first sealing portion close to the connecting portion. Since the first sealing portion is arranged on the side of the connecting portion away from the main body portion, when the rainwater flows to the side of the first sealing portion close to the connecting portion, the rainwater can flow out along the outer peripheral wall of the connecting portion, thereby reducing the possibility of rainwater flowing into the cab.

[0019] Optionally, the first sealing portion is arranged in an arc-shaped structure in the direction from the first sealing end to the second sealing end. In this way, the first sealing portion is more smooth for guiding rainwater, and rainwater can be guided from the side of the first sealing portion close to the to-be-connected member to the side of the first sealing portion close to the connecting portion, thereby preventing rainwater from accumulating at the first sealing portion.

[0020] Optionally, the first sealing portion, the second sealing portion and the limiting portion are in an integrated structure. In this way, the number of parts of the pressure relief valve can be reduced, and the installation is simpler.

[0021] Optionally, the pressure relief valve further comprises a protective cover arranged on the side of the housing away from the to-be-connected member. In this way, the protective cover can protect the pressure relief valve, and prevent foreign matters from entering the pressure relief valve or entering the cab through the pressure relief valve.

[0022] Optionally, the protective cover is arranged in contact with the sealing member. In this way, the sealing member can also reduce the possibility of rainwater entering the pressure relief valve or the cab through the gap between the to-be-connected member and the protective cover.

[0023] Optionally, the protective cover and the connecting portion cooperatively form a drainage channel, and a connecting gap is formed between the connecting portion and the protective cover and communicates with the drainage channel, the connecting gap is located between the first contact surface and the first end wall, and the first contact surface is the contact surface between the protective cover and the sealing member; the protective cover is further provided with a drainage opening communicating with the drainage channel, and the drainage opening is adapted to drain water in the drainage channel.

[0024] Since the protective cover and the connecting portion cooperatively form the drainage channel, and the connecting gap is formed between the connecting portion and the protective cover and communicates with the drainage channel, rainwater entering between the protective cover and the connecting portion can enter the drainage channel through the connecting gap, and the water in the drainage channel can be drained through the drainage opening communicating with the drainage channel, thereby preventing rainwater from entering the cab.

[0025] Optionally, the drainage channel is arranged in a ring shape, and the central axis of the drainage channel is consistent with the central axis of the sealing member. In this way, rainwater penetrating the peripheral wall around the connecting portion can enter the drainage channel through the connecting gap, and flow to the bottom of the drainage channel along the ring-shaped drainage channel, and then be drained from the drainage opening.

[0026] Optionally, the protective cover is provided with a clamping groove, and the outer peripheral wall of the connecting portion is provided with a clamping buckle, the clamping groove and the clamping buckle are clamped, so that the shell and the protective cover are clamped. In this way, the protective cover can be conveniently disassembled, so that the pressure relief valve can be conveniently inspected and repaired.

[0027] In a second aspect, the application further provides a cab assembly, which comprises the pressure relief valve.

[0028] In a third aspect, the application further provides a vehicle, which comprises the pressure relief valve or the cab assembly. It should be noted that the technical effects brought by the implementation manners of the second aspect and the third aspect can be referred to the technical effects brought by the implementation manners of the first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0030] Figure 1 A structural schematic diagram of a pressure relief valve provided by the embodiments of the application is shown in the figure;

[0031] Figure 2 A structural schematic diagram of a pressure relief valve provided by the embodiments of the application is shown in the figure; Figure 1

[0032] A structural schematic diagram of a pressure relief valve provided by the embodiments of the application is shown in the figure; Figure 3 Figure 1 A structural schematic diagram of a pressure relief valve provided by the embodiments of the application is shown in the figure;

[0033] Figure 4 A structural schematic diagram of a pressure relief valve provided by the embodiments of the application is shown in the figure; Figure 3

[0034] Reference signs:

[0035] 100, pressure relief valve; 200, to-be-connected member; 201, cab sheet metal;

[0036] 10, pressure relief member; 11, support frame; 12, rotating shaft; 13, pressure relief blade;

[0037] 20, shell; 21, main body portion; 22, connecting portion; 221, first end wall; 222, first annular groove; 223, clamping buckle;

[0038] 30, sealing member; 31, first sealing portion; 311, first sealing end; 312, second sealing end; 32, second sealing portion; 33, limiting portion;

[0039] ​​40, cover; 41, drainage channel; 42, drainage port; 43, clamping groove; 431, first clamping groove; 44, connecting gap; 45, guide vane. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified, the above directional description can be flexibly set in the process of actual application, under the condition of meeting the relative position relationship shown in the drawings.

[0042] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "communicating" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium. It can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, article or apparatus that comprises a list of elements not only includes those elements, but also includes other elements that are not expressly listed, or inherent to such process, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, article or apparatus comprising the element.

[0045] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example or illustration.

[0046] The embodiments of the present application provide a vehicle. The vehicle can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a fuel vehicle, etc. The vehicle can also be a car, a truck, a bus, a truck, a trailer, etc.

[0047] In some embodiments, the vehicle can include a cab assembly, which can be used to accommodate passengers and facilitate passengers to control the vehicle to travel.

[0048] The cab assembly can include a door. Since the space of the cab is relatively closed, when the door is closed, the air outside the cab can be squeezed into the cab, so that the air pressure inside the cab is higher than that outside the cab. In this way, the air pressure inside the cab is relatively high, which can cause the door to be difficult to close. In addition, the high air pressure inside the cab can cause the passengers to feel uncomfortable, affecting the driving experience.

[0049] In order to balance the air pressure inside the cab and the air pressure outside the cab, in some embodiments of the present application, the cab assembly can further include a pressure relief valve 100, which is opened when the door is closed, so that the air squeezed into the cab by the door can be discharged from the pressure relief valve 100, thereby balancing the air pressure inside and outside the cab, and making the door close more smoothly.

[0050] Please refer to Figure 1 and Figure 2 , Figure 1 The structure diagram of a pressure relief valve 100 provided in the embodiments of the present application is shown in Figure 2 The structure diagram of a pressure relief valve 100 provided in the embodiments of the present application is shown in Figure 1The exploded view of the pressure relief valve 100 is shown. In some embodiments, the pressure relief valve 100 can include a pressure relief member 10, which can have a closed state and a pressure relief state. When the cab door is closed, the pressure relief member 10 can be switched from the closed state to the pressure relief state, so that the air in the cab is discharged from the pressure relief member 10, facilitating the balance of air pressure inside and outside the cab, thereby facilitating the closing of the door and improving the comfort of the driver.

[0051] Specifically, please refer to Figure 2 In some embodiments, the pressure relief member 10 can include a support frame 11, a rotating shaft 12, and a pressure relief blade 13. The support frame 11 and the pressure relief blade 13 are rotatably connected by the rotating shaft 12. When the air pressure inside and outside the cab is balanced, the pressure relief member 10 is in a closed state, and the peripheral wall of the pressure relief blade 13 is in contact with the support frame 11, so that the cab can be sealed, thereby reducing the external noise entering the cab during driving and improving the comfort of the driver.

[0052] When the door is closed, the air from outside the cab is pressed into the cab, the air pressure in the cab rises, and the pressure difference between the inside and outside of the cab can provide a driving force to the pressure relief blade 13 towards the outside of the cab, so that the pressure relief member 10 is switched to the pressure relief state. At this time, the pressure relief blade 13 can rotate around the rotating shaft 12 towards the outside of the cab under the action of the driving force, so that there is a pressure relief gap between the peripheral wall of the pressure relief blade 13 and the support frame 11, so that the inside of the cab is communicated with the outside of the cab. In this way, the air pressed into the cab by the door can be discharged from the pressure relief valve 100, so that the air pressure inside and outside the cab is balanced, facilitating the closing of the door.

[0053] In some embodiments, the pressure relief blade 13 can be provided in multiple numbers. When the door is closed and the air pressure in the cab rises, the pressure difference between the inside and outside of the cab can make the multiple pressure relief blades 13 rotate around the rotating shaft 12, so that the pressure relief gap is formed between the multiple pressure relief blades 13 and the peripheral wall. In this way, the increase of the pressure relief gap can make the excess air in the cab be discharged to the outside more quickly, improve the pressure relief efficiency, and thus make the closing of the door more smooth.

[0054] In some embodiments, the pressure relief blade 13 can be provided in 2-8 numbers. For example, the pressure relief blade 13 can be provided in 2, 4, 5, or 8 numbers. The specific number can be selected according to the size and installation space of the pressure relief valve 100, which is not limited in the present application.

[0055] In some embodiments, the pressure relief valve 100 can further include a housing 20, which can be provided with a receiving cavity. The pressure relief member 10 can be arranged in the receiving cavity. The housing 20 can support and protect the pressure relief member 10, making the pressure relief valve 100 more reliable and stable.

[0056] In addition, the pressure relief member 10 can be connected to the cab through the shell 20, facilitating the installation of the pressure relief member 10 on the cab. For example, the pressure relief member 10 can be made of rubber, and the cab panel is made of metal. Directly connecting the pressure relief member 10 to the cab panel is relatively inconvenient, and due to factors such as vehicle vibration or rubber aging, the pressure relief member 10 made of rubber may be separated from the cab panel, which may increase the noise of the cab. By installing the pressure relief member 10 in the shell 20 and then connecting the shell 20 to the cab panel, the pressure relief member 10 can be supported and protected, making the connection more convenient and stable, and preventing the pressure relief member 10 from failing due to unstable installation of the pressure relief member 10 on the cab.

[0057] In some embodiments, the pressure relief member 10 and the shell 20 can be connected by clamping. The outer peripheral wall of the pressure relief member 10 can be in contact with the inner peripheral wall of the shell 20. In this way, the sealing effect of the pressure relief valve 100 in the closed state can be enhanced, preventing air from leaking between the pressure relief member 10 and the shell 20.

[0058] In addition, since the outer peripheral wall of the pressure relief member 10 can be in contact with the inner peripheral wall of the shell 20, in some embodiments, the inner peripheral wall of the shell 20 can act as at least part of the support frame 11. When the pressure relief member 10 is in the closed state, at least part of the pressure relief vane 13 can be in contact with the inner peripheral wall of the shell 20, sealing the cab.

[0059] Please refer to Figure 2 and Figure 3 , Figure 3 for Figure 1 a cross-sectional view of the pressure relief valve 100. The cab can include a cab panel 201 having a receiving opening for mounting the pressure relief valve 100 therein, so that the cab can be depressurized by the pressure relief valve 100.

[0060] In some embodiments, the shell 20 can be welded or clamped to the cab panel 201 to tightly connect the shell 20 to the receiving opening, preventing the pressure relief valve 100 from producing noise or even falling off due to vibration during vehicle travel.

[0061] Since there can be a gap between the shell 20 and the cab panel 201 when they are connected, water may enter the cab through the gap between the shell 20 and the cab panel 201 during rainy or snowy weather, causing inconvenience to the driver and passengers.

[0062] To solve the problem of rainwater entering the cab from the connection between the pressure relief valve 100 and the cab, please refer to Figure 2 and Figure 3In some embodiments, the pressure relief valve 100 may further include a sealing element 30 disposed between the housing 20 and the component to be connected 200 to seal the gap between the component to be connected 200 and the housing 20, thereby preventing water leakage into the cab from the gap between the housing 20 and the component to be connected 200. The component to be connected 200 may include the cab sheet metal 201, and may also include other components connected to the pressure relief valve 100, such as a window frame or support column, etc., which are not further limited in this application.

[0063] Please refer to Figure 3 and Figure 4 , Figure 4 for Figure 3 The enlarged view of the pressure relief valve 100 shown illustrates that in some embodiments, the seal 30 may include a first sealing portion 31 and a second sealing portion 32. Both the first sealing portion 31 and the second sealing portion 32 are disposed between the housing 20 and the component to be connected 200 to seal the gap between them. In this way, the first sealing portion 31 and the second sealing portion 32 form a double-layer seal, further increasing the sealing strength between the housing 20 and the component to be connected 200, reducing the possibility of water leakage, and thus increasing driving comfort and safety.

[0064] For example, the seal 30 can be made of an elastic material, such as thermoplastic elastomer, nitrile rubber, silicone rubber, or polyvinyl chloride. In this way, the seal 30 can compress and deform within the gap between the housing 20 and the component to be connected 200, and the seal 30 can abut against the component to be connected 200 and the housing 20, thereby sealing the pressure relief valve 100 with the component to be connected 200.

[0065] In some embodiments, the housing 20 may include a main body portion 21 and a connecting portion 22 connected to each other. The connecting portion 22 may be disposed around the main body portion 21, and the sealing member 30 may also be disposed around the main body portion 21, with the sealing member 30 in contact with the connecting portion 22. In this way, the sealing member 30 can be configured as annular to form a seal around the entire circumference of the housing 20, reducing the possibility of rainwater seeping into the passenger compartment from the peripheral wall of the housing 20.

[0066] In addition, the sealing member 30 is arranged in contact with the connecting portion 22, and is arranged between the housing 20 and the to-be-connected member 200, so that the sealing member 30 can be arranged between the connecting portion 22 and the to-be-connected member 200, one side of the sealing member 30 is arranged in contact with the connecting portion 22, and the other side of the sealing member 30 is arranged in contact with the to-be-connected member 200, so that the sealing member 30 can seal the gap between the connecting portion 22 and the to-be-connected member 200, and rainwater is isolated outside the sealing member 30. Since the connecting portion 22 and the sealing portion are arranged around the main body portion 21, rainwater is not easy to enter the main body portion 21 from the gap between the connecting portion 22 and the to-be-connected member 200, and rainwater can be prevented from flowing into the cab.

[0067] In some embodiments, the connecting portion 22 is provided with a first annular groove 222, and the sealing member 30 can further include a limiting portion 33, which can be connected with the first sealing portion 31 and the second sealing portion 32, and is arranged in the first annular groove 222. Since the limiting portion 33 is arranged in the first annular groove 222, the first annular groove 222 can position the limiting portion 33, and the sealing member 30 can be positioned, so that the displacement of the sealing member 30 caused by vibration of the vehicle can be reduced, and the possibility of the sealing strength between the to-be-connected member 200 and the housing 20 being reduced due to the displacement of the sealing member 30 can be reduced.

[0068] In some embodiments, the first sealing portion 31, the second sealing portion 32 and the limiting portion 33 can be arranged as an integrated structure. In this way, the number of parts of the pressure relief valve 100 can be reduced, and installation is simpler. In addition, since the first annular groove 222 can position the limiting portion 33, the first sealing portion 31, the second sealing portion 32 and the limiting portion 33 are arranged as an integrated structure, and the first sealing portion 31 and the second sealing portion 32 can be positioned.

[0069] In other embodiments, the first sealing portion 31, the second sealing portion 32 and the limiting portion 33 can be connected by means of bolt connection, clamping or gluing, and the present application does not make further limitation.

[0070] In some embodiments, the first sealing portion 31 can be arranged on the outer circumferential side of the second sealing portion 32. In this way, when it is raining and snowing, rainwater first contacts the first sealing portion 31, and the first sealing portion 31 arranged on the outer circumferential side of the second sealing portion 32 can protect the second sealing portion 32, reduce the entry of rainwater into the second sealing portion 32, and further reduce the possibility of water leakage of the pressure relief valve 100.

[0071] In some embodiments, the first sealing part 31 is spaced apart from the second sealing part 32 at an end away from the connecting part 22.

[0072] In some embodiments, the first sealing part 31 is spaced apart from the second sealing part 32 at an end away from the connecting part 22.

[0073] Since the sealing part 30 can be made of elastic material, when the pressure relief valve 100 is installed, the first sealing part 31 and the second sealing part 32 can be compressed and deformed, and the distance between the first sealing part 31 and the second sealing part 32 can be reduced due to the compression and deformation, which can easily cause interference.

[0074] In this way, the second sealing part 32 is spaced apart from the first sealing part 31 at an end away from the connecting part 22, so that when the first sealing part 31 and the second sealing part 32 are compressed and deformed, there is a deformation space between the first sealing part 31 and the second sealing part 32, thereby reducing the interference between the first sealing part 31 and the second sealing part 32 due to deformation, so that the first sealing part 31 and the second sealing part 32 can perfectly seal the gap between the housing 20 and the to-be-connected member 200.

[0075] In some embodiments, the connecting part 22 includes a first end wall 221, and the first end wall 221 is provided with a first annular groove 222, i.e., the first end wall 221 is a wall surface of the connecting part 22 facing the to-be-connected member 200, a first projection of an end of the first sealing part 31 away from the connecting part 22 on a plane where the first end wall 221 is located, and a second projection of an end of the second sealing part 32 away from the connecting part 22 on the first end wall 221, and an area of the first projection is smaller than an area of the second projection.

[0076] In this way, the second sealing part 32 has a larger contact area with the to-be-connected member 200 than the first sealing part 31, so that the second sealing part 32 has a better sealing effect between the housing 20 and the to-be-connected member 200, and rainwater is less likely to leak into the cab from the second sealing part 32. Since the second sealing part 32 is arranged at an inner circumferential side of the first sealing part 31, if rainwater leaks from the first sealing part 31, the second sealing part 32 can also seal the gap between the housing 20 and the to-be-connected member 200.

[0077] In some embodiments, the length of the second sealing portion 32 along the axial direction of the sealing member 30 is greater than the length of the first sealing portion 31 along the axial direction of the sealing member 30 before assembly, so that when the sealing member 30 is assembled between the connecting portion 22 and the to-be-connected member 200, the compression degree of the second sealing portion 32 can be greater than the compression degree of the first sealing portion 31, thereby further enhancing the sealing strength of the second sealing portion 32.

[0078] In some embodiments, the first sealing portion 31 includes oppositely arranged first and second sealing ends 311 and 312, the first sealing end 311 is spaced apart from the second sealing portion 32, the second sealing end 312 is connected to the limiting portion 33, and the first sealing portion 31 is arranged on the side of the connecting portion 22 away from the main body portion 21.

[0079] In this way, the first sealing portion 31 is arranged obliquely relative to the axial direction of the sealing member 30, and gradually approaches the central axis direction of the sealing member 30 in the direction from the to-be-connected member 200 to the connecting portion 22, so that when rainwater can flow along the first sealing portion 31 from one side of the to-be-connected member 200 to the side of the first sealing portion 31 close to the connecting portion 22. In addition, since the first sealing portion 31 is arranged on the side of the connecting portion 22 away from the main body portion 21, when the rainwater flows to the side of the first sealing portion 31 close to the connecting portion 22, it can flow out along the outer peripheral wall of the connecting portion 22, thereby reducing the possibility of rainwater entering the cab.

[0080] In some embodiments, the first sealing portion 31 is arranged in an arc-shaped structure in the direction from the first sealing end 311 to the second sealing end 312. In this way, the first sealing portion 31 is more smooth for the diversion of rainwater, facilitating the diversion of rainwater from the side of the first sealing portion 31 close to the to-be-connected member 200 to the side of the first sealing portion 31 close to the connecting portion 22, preventing rainwater from accumulating at the first sealing portion 31.

[0081] In other embodiments, the first sealing portion 31 can also be arranged in a straight line type structure or an irregular structure, which is not limited in the present application.

[0082] In some embodiments, the pressure relief valve 100 can further include a protective cover 40 arranged on the side of the housing 20 away from the to-be-connected member 200. In this way, the protective cover 40 can protect the pressure relief valve 100 from foreign matter entering the pressure relief valve 100 or prevent foreign matter from entering the cab through the pressure relief valve 100.

[0083] In some embodiments, the protective cover 40 is arranged in contact with the sealing member 30. In this way, the sealing member 30 can also reduce the entry of rainwater into the pressure relief valve 100 or the cab through the gap between the to-be-connected member 200 and the protective cover 40.

[0084] Since the sealing member 30 is made of elastic material, in some embodiments, the cover 40 can also compress the sealing member 30 to make the sealing member 30 abut against the cover 40, thereby improving the sealing strength between the sealing member 30 and the cover 40.

[0085] Please refer to Figures 2-4 In some embodiments, the cover 40 and the connecting portion 22 are provided with a drainage channel 41, and the connecting portion 22 and the cover 40 are provided with a connecting gap 44 communicating with the drainage channel 41, the connecting gap 44 is located between the first contact surface and the first end wall 221, the first contact surface is the contact surface between the cover 40 and the sealing member 30; the cover 40 is further provided with a drainage port 42 communicating with the drainage channel 41, the drainage port 42 is adapted to drain water in the drainage channel 41.

[0086] In this way, when there is an assembly error between the cover 40 and the connecting portion 22, or the sealing strength between the sealing member 30 and the cover 40 decreases, rainwater can enter the gap between the sealing member 30 and the cover 40. Since the cover 40 and the connecting portion 22 are provided with a drainage channel 41, and the connecting portion 22 and the cover 40 are provided with a connecting gap 44 communicating with the drainage channel 41, the rainwater entering the gap between the cover 40 and the connecting portion 22 can enter the drainage channel 41 through the connecting gap 44, and the water in the drainage channel 41 can be drained through the drainage port 42 communicating with the drainage channel 41, thereby preventing rainwater from entering the cab.

[0087] In some embodiments, the drainage port 42 is arranged at the bottom of the cover 40, so that the water in the drainage channel 41 can be easily drained from the drainage port 42 under the action of gravity.

[0088] In other embodiments, the drainage port can also be connected with a water pumping device to drain the water in the drainage channel.

[0089] Since the connecting portion 22 is arranged in a ring shape, and the cover 40 is arranged on the connecting portion 22 to protect the pressure relief valve 100, the connecting gap 44 can be formed between the cover 40 and the connecting portion 22 around the peripheral wall of the connecting portion 22, therefore, in some embodiments, the drainage channel 41 can be arranged in a ring shape, and the central axis of the drainage channel 41 is consistent with the central axis of the sealing portion. In this way, the rainwater entering around the peripheral wall of the connecting portion 22 can enter the drainage channel 41 through the connecting gap 44, and flow along the ring-shaped drainage channel 41 to the bottom of the drainage channel 41, and then be drained from the drainage port 42.

[0090] It should be noted that the central axis of the drainage channel 41 is consistent with the central axis of the sealing portion is not limited to absolute consistency, but also includes general consistency, that is, the central axis direction of the drainage channel 41 is generally consistent with the central axis direction of the sealing portion, for example, the included angle between the central axis of the drainage channel 41 and the central axis of the sealing portion is less than 10°, which can be generally consistent.

[0091] In one possible structural design, the protective cover 40 is clamped with the connecting portion 22, so that the protective cover 40 is covered on the shell 20. In other possible structural designs, the protective cover 40 can also be welded or glued with the connecting portion 22, which is not limited by the present application.

[0092] Specifically, the protective cover 40 can be provided with a clamping groove 43, and the outer peripheral wall of the connecting portion 22 can be provided with a clamping buckle 223. The shell 20 and the protective cover 40 can be clamped by the cooperation of the clamping buckle 223 and the clamping groove 43.

[0093] In this way, the protective cover 40 can be easily disassembled, so that the pressure relief valve 100 can be easily checked and repaired.

[0094] In some embodiments, the clamping groove 43 can be provided in a plurality, and the clamping buckle 223 can also be provided in a plurality. The plurality of clamping grooves 43 and the plurality of clamping buckles 223 are matched one by one, so that the connection between the protective cover 40 and the shell 20 is more reliable.

[0095] Since the clamping groove 43 provided on the protective cover 40 can communicate with the external air, rainwater can enter the pressure relief valve 100 through the clamping groove 43. In some embodiments, the clamping groove 43 can communicate with the connecting gap 44, so that the rainwater entering through the clamping groove 43 can also enter the drainage channel 41 along the connecting gap 44, and then be discharged through the drainage port 42.

[0096] In some embodiments, the clamping groove 43 can include a first clamping groove 431, which can be provided at the bottom of the protective cover 40, and the first clamping groove 431 can communicate with the drainage channel 41. The first clamping groove 431 can also communicate with the external air, so that the rainwater in the drainage channel 41 can be discharged to the outside of the cab through the first clamping groove 431, preventing rainwater from entering the cab through the pressure relief valve 100.

[0097] In some embodiments, the protective cover 40 can also include a plurality of guide vanes 45, which are spaced apart in a direction perpendicular to the axis of the sealing element 30. In this way, air flows through the gap between the plurality of guide vanes 45, so that the air in the cab can be discharged to the outside of the cab.

[0098] In some embodiments, the plurality of guide vanes 45 can be arranged in parallel, and in a direction from the vehicle to the ground, the guide vanes 45 can be inclined toward the outside of the cab, and the spacing between the plurality of guide vanes 45 is less than the width of the guide vanes 45.

[0099] In this way, the guide vanes 45 can block rainwater from entering the pressure relief valve 100 from the gap of the guide vanes 45, and in a direction from the vehicle to the ground, the guide vanes 45 can be inclined toward the outside of the cab, so that rainwater falling on the guide vanes 45 can flow along the guide vanes 45 to the outside of the cab, reducing the possibility of rainwater entering the interior of the pressure relief valve 100.

[0100] In the description of the embodiments of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0101] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pressure relief valve characterized by, The utility model relates to a sealing device for a shell, comprising: a shell (20); a sealing member (30) comprising a first sealing part (31) and a second sealing part (32), each of the first sealing part (31) and the second sealing part (32) being adapted to be arranged between the shell (20) and a to-be-connected member (200) to seal a gap between the to-be-connected member (200) and the shell (20).

2. The pressure relief valve of claim 1, wherein The shell (20) comprises: a main body part (21) around which the sealing member (30) is arranged; a connecting part (22) arranged around the main body part (21) and in contact with the sealing member (30).

3. The pressure relief valve of claim 2, wherein The connecting part (22) is provided with a first annular groove (222), and the sealing member (30) comprises a limiting part (33) connected to both the first sealing part (31) and the second sealing part (32), the limiting part (33) being arranged in the first annular groove (222).

4. The pressure relief valve of claim 3, wherein The first sealing part (31) is arranged on the outer circumferential side of the second sealing part (32).

5. The pressure relief valve of claim 4, wherein The first end of the first sealing part (31) away from the connecting part (22) is arranged in spaced relation to the first end of the second sealing part (32) away from the connecting part (22).

6. The pressure relief valve of claim 5, wherein The first end wall (221) of the connecting part (22) is provided with the first annular groove (222), the projection of the first end of the first sealing part (31) away from the connecting part (22) on the plane of the first end wall (221) is a first projection, the projection of the first end of the second sealing part (32) away from the connecting part (22) on the plane of the first end wall (221) is a second projection, and the area of the first projection is smaller than the area of the second projection.

7. The pressure relief valve of claim 6, wherein The first sealing part (31) comprises oppositely arranged first and second sealing ends (311, 312), the first sealing end (311) is arranged in spaced relation to the second sealing part (32), the second sealing end (312) is connected to the limiting part (33), and the first sealing part (31) is arranged on the side of the connecting part (22) away from the main body part (21).

8. The pressure relief valve of claim 7, wherein, The first sealing part (31) is arranged in an arc-shaped structure along the direction from the first sealing end (311) to the second sealing end (312).

9. The pressure relief valve of claim 8, wherein, The first sealing part (31), the second sealing part (32), and the limiting part (33) are of an integral structure.

10. The pressure relief valve of claim 8, wherein Further comprising a protective cover (40) arranged on the side of the shell (20) away from the to-be-connected member (200).

11. The pressure relief valve of claim 10, wherein The protective cover (40) is arranged in contact with the sealing member (30).

12. The pressure relief valve of claim 11, wherein, The protective cover (40) and the connecting part (22) cooperatively form a drainage channel (41), and a connecting gap (44) is formed between the connecting part (22) and the protective cover (40) and communicates with the drainage channel (41), the connecting gap (44) is located between a first contact surface and the first end wall (221), and the first contact surface is the contact surface between the protective cover (40) and the sealing member (30). A drain port (42) in communication with the drain passage (41) is further arranged on the protective cover (40), and the drain port (42) is adapted to drain water in the drain passage (41).

13. The pressure relief valve of claim 12, wherein, The drain passage (41) is arranged in a ring shape, and a central axis of the drain passage (41) is consistent with a central axis of the sealing member (30).

14. The pressure relief valve of claim 13, wherein, The protective cover (40) is provided with a clamping groove (43), and the connecting portion (22) is provided with a clasp (223), the clamping groove (43) and the clasp (223) are clamped to clamp the shell (20) and the protective cover (40).

15. A cab assembly characterized by, A pressure relief valve (100) according to any one of claims 1-14.

16. A vehicle characterized by comprising: A cab assembly according to claim 15, comprising a pressure relief valve (100) according to any one of claims 1-14.

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