Pressure relief valve and vehicle

Abstract

The present disclosure relates to a pressure relief valve and a vehicle. The pressure relief valve comprises a base, a pressure relief valve piece and a driving mechanism. The base is provided with a vent. The driving mechanism comprises a steering engine, a connecting rod and a rotating shaft. The steering engine is fixed on the base. One end of the connecting rod is connected to the steering engine, and the other end is connected to the rotating shaft. The pressure relief valve piece is fixed on the rotating shaft. The steering engine drives the rotating shaft to rotate through the connecting rod, and the pressure relief valve piece rotates with the rotating shaft to open or close the vent. The linkage design of the steering engine, the connecting rod and the rotating shaft can adaptively control the opening range of the vent according to various working conditions, thereby reducing the pressure change in the cab and the discomfort of people who are more sensitive to ear pressure.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more particularly to a pressure relief valve and a vehicle. Background Technology

[0002] As people's demands for sound insulation and rain protection increase, the sealing performance of modern car cabins has been continuously improved. However, highly sealed cabins can also lead to problems such as difficulty in opening and closing doors, poor air conditioning circulation, and discomfort caused by changes in ear pressure when opening and closing doors. Cab pressure relief valves can solve these problems.

[0003] The ventilation openings of existing cab pressure relief valves primarily rely on airflow inside the cab to push the valve plate to flip or deform, thus requiring a prior pressure change inside the cab for passive opening. This means the opening action lags behind the pressure change. Consequently, a certain amount of ear pressure will still be generated inside the cab, which can cause discomfort for more sensitive individuals. Utility Model Content

[0004] This disclosure provides a pressure relief valve and a vehicle to address the shortcomings of the related art.

[0005] According to a first aspect of the present disclosure, a pressure relief valve is provided, which includes a base, a pressure relief valve plate, and a drive mechanism; the base is provided with a vent; the drive mechanism includes a servo motor, a connecting rod, and a rotating shaft, the servo motor is fixed to the base, one end of the connecting rod is connected to the servo motor, the other end is connected to the rotating shaft, and the pressure relief valve plate is fixed to the rotating shaft; The servo motor drives the rotating shaft to rotate via the connecting rod, and the pressure relief valve rotates with the rotating shaft to open or close the vent.

[0006] Optionally, the base includes a hollow shell and a valve plate connected to the hollow shell, the vent is disposed on the valve plate, the valve plate is provided with a clearance groove for the rotating shaft to pass through, and the rotating shaft is rotatably connected to the hollow shell.

[0007] Optionally, one end of the rotating shaft extends out of the clearance groove, and the end is provided with an annular groove, in which a retaining ring is engaged, and the retaining ring abuts against the outer wall of the hollow shell.

[0008] Optionally, the connecting rod includes a first rod portion, a second rod portion, and a third rod portion, wherein the second rod portion is hinged between the first rod portion and the third rod portion, the other end of the first rod portion is hinged to the servo motor, and the other end of the third rod portion is hinged to the rotating shaft.

[0009] Optionally, the drive mechanism further includes a torsion spring, which includes a spring body, a first leg, and a second leg; the spring body is sleeved on the rotating shaft, the first leg abuts against the third rod portion, and the second leg abuts against the hollow shell.

[0010] Optionally, the valve plate is arranged at an angle toward the outer side of the vehicle body.

[0011] Optionally, a sealing strip is also included, which is disposed on the base for sealing the periphery of the opening when the pressure relief valve is installed to the cab sheet metal.

[0012] Optionally, the rotating shaft is provided with a plurality of positioning posts, which are spaced apart along the length of the rotating shaft, and the pressure relief valve plate is provided with positioning holes adapted to the positioning posts.

[0013] According to a second aspect of the present disclosure, a vehicle is provided that includes the pressure relief valve described in the first aspect.

[0014] Optionally, the system also includes a control unit, wherein the servo motor is connected to the control unit and the pressure relief valve plate respectively, and the control unit is used to control the servo motor to switch the working state of the pressure relief valve plate according to vehicle parameters, wherein the vehicle parameters include at least one of the following: door lock signal, door position signal, air conditioning signal and in-vehicle air pressure value.

[0015] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: As can be seen from the above embodiments, this application, through the linkage design of servo motor, connecting rod and rotating shaft, can adaptively control the opening range of the ventilation port according to various working conditions, reducing pressure changes inside the cab and discomfort for people who are more sensitive to ear pressure.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0018] Figure 1 This is a schematic diagram illustrating the structure of a pressure relief valve in a fully open state according to an exemplary embodiment.

[0019] Figure 2 This is a schematic diagram illustrating the structure of a pressure relief valve in a fully closed state according to an exemplary embodiment.

[0020] Figure 3 This is a schematic diagram illustrating the structure of a pressure relief valve in a partially open state according to an exemplary embodiment.

[0021] Figure 4 yes Figure 1 Exploded view.

[0022] Figure 5 This is a cross-sectional view of a pressure relief valve according to an exemplary embodiment.

[0023] Figure 6 This is a schematic diagram of the structure of a pressure relief valve according to an exemplary embodiment.

[0024] Figure 7 This is a structural block diagram of a pressure relief valve control system according to an exemplary embodiment.

[0025] Figure 8 This is a logic block diagram of a pressure relief valve control system according to an exemplary embodiment. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0027] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0028] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0029] Reference Figures 1-4As shown, this application discloses a pressure relief valve, which includes a base 10, a pressure relief valve plate 20, a drive mechanism 30, and a sealing strip 40. The base 10 is provided with a vent 11. The drive mechanism 30 actively adjusts the opening range of the pressure relief valve plate 20 according to various operating conditions, so that the vent 11 is in an open, closed, or partially open state, thereby reducing pressure changes inside the cab and reducing discomfort for people who are sensitive to ear pressure.

[0030] The base 10 includes a hollow housing 12 and a valve plate 13 connected within the hollow housing 12. In one embodiment, the valve plate 13 is integrally injection molded with the hollow housing 12. In another embodiment, the valve plate 13 is detachably installed within the hollow housing 12 by means of bonding, snap-fitting, or other methods.

[0031] Ventilation openings 11 are disposed on valve plate 13. In this embodiment, multiple ventilation openings 11 are provided and arranged in an array. On the one hand, this maximizes the preservation of the structural integrity of valve plate 13 and avoids the risk of rigidity weakening and deformation caused by excessively large openings. On the other hand, it avoids the local airflow turbulence or dead zone that may be generated by a single large ventilation opening 11, thereby achieving a more efficient and stable ventilation and pressure balance effect.

[0032] In this embodiment, the valve plate 13 is arranged at an angle toward the outside of the vehicle body, thereby preventing external airflow from directly impacting the valve plate 13 and affecting its structural strength.

[0033] The pressure relief valve plate 20 is a square plate structure, and the corresponding valve plate 13 is also a square plate structure. The pressure relief valve plate 20 is installed on the side closer to the outside of the vehicle body and can cover the vent 11. Thus, when the door is closed or the air conditioning is turned on and the air pressure in the cabin increases, the drive mechanism 30 actively adjusts the pressure relief valve plate 20 to flip away from the vent 11, at which time the vent 11 is in the open state, so that the air pressure in the cabin remains relatively stable.

[0034] When outside airflow is about to enter the cab, the drive mechanism 30 actively adjusts the pressure relief valve 20 to flip towards the side closer to the vent 11, at which point the vent 11 is closed. Therefore, very little outside air can enter the cab, preventing dust and odors from entering the cab with the air, ensuring sealing performance, and preventing rainwater and other substances from entering the cab.

[0035] In this embodiment, a single pressure relief valve plate 20 is used. In other embodiments, multiple pressure relief valve plates 20 are provided and connected by a parallel four-bar linkage mechanism. When the system pressure changes, this linkage mechanism ensures that all pressure relief valve plates 20 synchronously open or close, thereby doubling the pressure relief area.

[0036] In this embodiment, the pressure relief valve 20 opens and closes the ventilation port 11 by rotating. In other embodiments, the pressure relief valve 20 may be translated to open and close the ventilation port 11, or the pressure relief valve 20 may be rotated along an axis approximately perpendicular to the surface of the pressure relief valve 20 to open and close the ventilation port 11.

[0037] The drive mechanism 30 includes a servo motor 31, a connecting rod 32, a rotating shaft 33, a retaining ring 34, and a torsion spring 35. The servo motor 31 is fixed to the base 10, one end of the connecting rod 32 is connected to the servo motor 31, and the other end is connected to the rotating shaft 33. The pressure relief valve plate 20 is fixed to the rotating shaft 33.

[0038] In this embodiment, the servo motor 31 drives the rotating shaft 33 to rotate via the connecting rod 32, and the pressure relief valve plate 20 rotates with the rotating shaft 33 to open or close the ventilation port 11. In other embodiments, the drive mechanism 30 may also adopt an electromagnet, hydraulic system, pneumatic system, etc., and there is no specific limitation here.

[0039] It should be noted that the aforementioned servo motor 31 can be fixed to the outside of the base 10 by means of screws, snap-fit, or other methods that facilitate disassembly. Of course, depending on the installation position of the pressure relief valve, the servo motor 31 can also be placed on other components next to the pressure relief valve; no specific restrictions are imposed here.

[0040] The link 32 includes a first link 321, a second link 322 and a third link 323. The second link 322 is hinged between the first link 321 and the third link 323. The other end of the first link 321 is hinged to the servo motor 31, and the other end of the third link 323 is hinged to the rotating shaft 33.

[0041] like Figure 1 As shown, when the pressure relief valve is fully open, that is, when the vent 11 is fully open, the output shaft of the second rod 322 causes the first rod 321 to be in the uppermost position, and the pressure relief valve plate 20 rotates to the maximum angle. At this time, the pressure relief capacity is the highest and the sound insulation and sealing performance is the worst.

[0042] like Figure 2 As shown, when the pressure relief valve is fully closed, that is, when the pressure relief valve plate 20 covers the vent 11, the output shaft of the servo motor 31 causes the first rod 321 to be in the lowest position. At this time, the pressure relief capacity is the lowest and the sound insulation and sealing performance is good.

[0043] like Figure 3 As shown, when the pressure relief valve is partially open, that is, the pressure relief valve plate 20 and the vent 11 are disengaged and the vent 11 is partially open, the second rod 322 causes the first rod 321 to be located between the uppermost and lowermost positions. At this time, the pressure relief capacity and sealing performance are between the fully closed and fully open states, seeking a balance between pressure relief capacity and sound insulation and sealing performance.

[0044] The rotating shaft 33 is provided with multiple positioning posts 332, which are spaced apart along the length of the rotating shaft 33. The pressure relief valve plate 20 is provided with positioning holes that are adapted to the positioning posts 332. Thus, the matching design of the positioning posts 332 and the positioning holes ensures accurate positioning and reliable connection between the pressure relief valve plate 20 and the rotating shaft 33, while significantly simplifying the assembly process. In other embodiments, the rotating shaft 33 and the pressure relief valve plate 20 are integrally formed or fixedly connected by welding or other means.

[0045] Please refer to the reference again. Figure 5 As shown, the valve plate 13 protrudes into the vehicle body and forms an arc-shaped clearance groove 131 for the rotating shaft 33 to pass through. The rotating shaft 33 is rotatably connected to the hollow housing 12. In this way, not only is assembly guidance provided between the valve plate 13 and the rotating shaft 33, but it also ensures that the rotating shaft 33 has a uniform and smooth contact surface with the valve plate 13 when rotating, fundamentally eliminating the jamming, abnormal noise or wear that may be caused by improper fit, and greatly improving the reliability of rotation.

[0046] Please refer to the reference again. Figure 6 As shown, one end of the rotating shaft 33 extends out of the relief groove 131, and the end is provided with an annular groove 331. A retaining ring 34 is engaged in the annular groove 331, and the retaining ring 34 abuts against the outer wall of the hollow shell 12. In this embodiment, the retaining ring 34 is an elastic retaining ring 34, which, by utilizing its own elasticity and restraining force, directly abuts against the outer wall of the hollow shell 12, forming an effective axial limit. This restricts the degree of freedom of movement of the rotating shaft 33 along its axial direction, ensuring that the rotating shaft 33 and the pressure relief valve plate 20 installed on it will not experience axial movement under vibration, thereby eliminating abnormal noise, wear, or poor sealing problems caused by position drift.

[0047] The torsion spring 35 includes a spring body 351, a first leg 352, and a second leg 353. The spring body 351 is sleeved on the rotating shaft 33, the first leg 352 abuts against the third rod portion 323, and the second leg 353 abuts against the hollow shell 12.

[0048] Compared to the fully closed state of the pressure relief valve, when the pressure relief valve is fully open, the angle between the first support leg 352 and the second support leg 353 increases as the third lever 323 rises, allowing it to store elastic potential energy. Thus, if the drive mechanism 30 loses power or the servo motor 31 malfunctions, the energy stored in the torsion spring 35 is immediately released, automatically driving the shaft 33 to rotate and pull the pressure relief valve plate 20 back to the fully closed state. This ensures that the pressure relief valve is not constantly open, maintaining the vehicle's basic sealing protection at all times.

[0049] The outer ring of the hollow shell 12 is provided with a flange 14, and a sealing strip 40 is provided on the flange 14. It is used to seal the periphery of the opening when the pressure relief valve is installed to the cab sheet metal to prevent liquid and gas leakage and improve the cab sealing performance.

[0050] In a preferred embodiment, a grille cover is added to the outside of the pressure relief valve. This cover, as an integrated peripheral component, primarily serves a dual purpose: protection, prevention of foreign object intrusion, and aesthetic enhancement. It effectively prevents damage to the valve body from external collisions or accidental contact, while also preventing debris from clogging the valve port, ensuring the reliability of the pressure relief function. Furthermore, the integrated grille design makes the entire component more visually neat and aesthetically pleasing, allowing it to better integrate with the overall design.

[0051] Reference Figure 7 As shown, this application also discloses a vehicle, including the aforementioned pressure relief valve and control unit. A servo motor 31 is connected to the pressure relief valve plate 20 and the control unit, respectively. The control unit controls the servo motor 31 to switch the operating state of the pressure relief valve plate 20 according to vehicle parameters, including at least one of the following: door lock signal, door position signal, air conditioning signal, and in-vehicle air pressure value. The switching of the pressure relief valve plate 20 can be performed when the vehicle is running or when the vehicle is in motion. Switching the operating state of the pressure relief valve plate 20 may include switching to a ventilation state, switching to a closed state, or changing the ventilation port diameter, etc.

[0052] For example, such as Figure 8 As shown, the moment the door lock is unlocked, the servo motor 31 actively controls the pressure relief valve plate 20 to flip away from the vent 11. At this time, the pressure relief valve is fully opened to prevent difficulty in opening the door and ear pressure problems.

[0053] If the door lock is not unlocked, the system will further determine whether the door is open. When the door is open, the servo motor 31 actively controls the pressure relief valve plate 20 to flip away from the vent 11. At this time, the pressure relief valve is fully open to prevent difficulty in closing the door and ear pressure problems when closing the door.

[0054] If the car door is not open, the system will further determine whether the air conditioning is on with external air circulation. If the air conditioning is on with external air circulation, the servo motor 31 actively controls the pressure relief valve 20 to rotate slightly away from the vent 11, thus partially opening the pressure relief valve. The degree of opening of the pressure relief valve can be controlled according to the airflow level; the opening angle of the pressure relief valve 20 can be determined by referring to a table based on the air conditioning fan speed setting. Alternatively, the opening angle of the pressure relief valve 20 can be controlled in real-time using an in-vehicle air pressure sensor, or a combination of both can be used to balance ear pressure issues and sound insulation / sealing.

[0055] If the air conditioning external circulation is not turned on or in other states, the servo motor 31 actively controls the pressure relief valve plate 20 to flip towards the side closer to the vent 11. At this time, the pressure relief valve is in a completely closed state, ensuring the sound insulation and sealing performance of the vehicle interior. Furthermore, when vehicle parameters change, the pressure relief valve can be actively changed in its state at any time via the servo motor 31.

[0056] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0057] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A pressure relief valve, characterized in that, It includes a base, a pressure relief valve plate, and a drive mechanism; the base is provided with a ventilation port; the drive mechanism includes a servo motor, a connecting rod, and a rotating shaft, the servo motor is fixed to the base, one end of the connecting rod is connected to the servo motor, the other end is connected to the rotating shaft, and the pressure relief valve plate is fixed to the rotating shaft; The servo motor drives the rotating shaft to rotate via the connecting rod, and the pressure relief valve rotates with the rotating shaft to open or close the vent.

2. The pressure relief valve according to claim 1, characterized in that, The base includes a hollow shell and a valve plate connected to the hollow shell. The vent is disposed on the valve plate. The valve plate is provided with a clearance groove for the rotating shaft to pass through. The rotating shaft is rotatably connected to the hollow shell.

3. The pressure relief valve according to claim 2, characterized in that, One end of the rotating shaft extends out of the clearance groove, and the end is provided with an annular groove. A retaining ring is engaged in the annular groove, and the retaining ring abuts against the outer wall of the hollow shell.

4. The pressure relief valve according to claim 2, characterized in that, The connecting rod includes a first rod portion, a second rod portion, and a third rod portion. The second rod portion is hinged between the first rod portion and the third rod portion. The other end of the first rod portion is hinged to the servo motor, and the other end of the third rod portion is hinged to the rotating shaft.

5. The pressure relief valve according to claim 4, characterized in that, The drive mechanism also includes a torsion spring, which includes a spring body, a first leg, and a second leg; the spring body is sleeved on the rotating shaft, the first leg abuts against the third rod portion, and the second leg abuts against the hollow shell.

6. The pressure relief valve according to claim 2, characterized in that, The valve plate is arranged at an angle toward the outside of the vehicle body.

7. The pressure relief valve according to claim 2, characterized in that, It also includes a sealing strip, which is disposed on the base and is used to seal the periphery of the opening when the pressure relief valve is installed to the cab sheet metal.

8. The pressure relief valve according to claim 1, characterized in that, The rotating shaft is provided with a plurality of positioning posts, which are spaced apart along the length of the rotating shaft. The pressure relief valve plate is provided with positioning holes that are adapted to the positioning posts.

9. A vehicle, characterized in that, The pressure relief valve includes any one of claims 1-8.

10. The vehicle according to claim 9, characterized in that, It also includes a control unit, the servo motor is connected to the control unit and the pressure relief valve plate respectively, the control unit is used to control the servo motor to switch the working state of the pressure relief valve plate according to vehicle parameters, the vehicle parameters include at least one of the following: door lock signal, door position signal, air conditioning signal and in-vehicle air pressure value.

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