An airbag device for reducing ear pressure when closing the door of a cab

Abstract

The utility model discloses an airbag device for reducing ear pressure when closing a cab door, and mainly relates to the technical field of heavy-duty automobile parts. It comprises a connecting mechanism and an airbag mechanism, wherein the connecting mechanism is used to connect the cab and the airbag mechanism, and the airbag mechanism comprises an airbag body and an airbag protection net, wherein the airbag protection net is arranged outside the airbag. The utility model has the beneficial effect that it greatly reduces the high pressure at the moment of closing the door by installing a decompression airbag at an appropriate position in the cab, thereby reducing the closing force and optimizing the driver's ear pressure discomfort.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy-duty automobile parts, in particular to an air bag device for reducing ear pressure when closing a door of a cab. Background Art

[0002] The car cab has a certain degree of enclosure. Good enclosure can ensure driving comfort and safety, but it will also cause the air pressure in the cab to be too high when the door is closed. Especially for heavy-duty vehicles, this air pressure will increase the door closing force while also causing ear pressure discomfort to the driver. In view of this situation, the cab is basically equipped with a pressure relief valve for pressure relief during design. However, the effective area of ​​the pressure relief valve is small, and the optimization of the ear pressure discomfort is poor. Technical improvement is needed to further optimize the ear pressure when closing the door.

[0003] Therefore, a novel airbag device for reducing ear pressure when the cab door is closed is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an airbag device for reducing ear pressure when closing a cab door, which greatly reduces the high pressure at the moment of closing the door by installing a decompression airbag at an appropriate position in the cab, thereby reducing the closing force and optimizing the driver's ear pressure discomfort.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] It comprises a connecting mechanism and an airbag mechanism, wherein the connecting mechanism is used to connect the cab and the airbag mechanism, and the airbag mechanism comprises an airbag body and an airbag protection net, wherein the airbag protection net is arranged outside the airbag.

[0007] Preferably, the connecting mechanism is specifically a connecting flange, and the connecting flange includes a first flange piece and a second flange piece, the outer edge of the first flange piece is sealed and connected to the inner edge of the opening of the airbag body, and the second flange piece is connected to the cab ceiling.

[0008] Preferably, the first flange is connected to the second flange by bolts, concentric through holes with the same diameter are provided at the center positions of the first flange and the second flange, and sealing rubber rings are provided between the first flange and the roof of the cab and between the second flange and the ceiling of the cab respectively.

[0009] Preferably, the protective net is a retractable mesh structure.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the high pressure at the moment of door closing is greatly reduced by installing a decompression airbag at an appropriate position in the cab, thereby reducing the door closing force and optimizing the driver's ear pressure discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of air bag decompression of the utility model.

[0012] Numbers shown in the accompanying drawings:

[0013] 1. Cab; 2. Door; 3. Airbag; 4. Deflector; 5. Airbag protection net. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0015] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0016] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0017] Embodiment 1:

[0018] like Figure 1 As shown, it includes a connecting mechanism and an airbag mechanism, wherein the connecting mechanism is used to connect the cab and the airbag mechanism, the airbag mechanism includes an airbag body and an airbag protection net, the airbag protection net is arranged on the outside of the airbag, the airbag is a hollow segmented bag-like structure and an opening is arranged at one end of the airbag, each section of the airbag structure is interconnected, wherein the airbag adopts a segmented structure to prevent a large amount of gas from rushing into the airbag at the moment of closing the door, causing irreversible damage to the contractility of the airbag and reducing the life of the airbag, and the segmented structure allows the gas to rush into the airbag in sections, thereby reducing the pressure the airbag can withstand.

[0019] The connecting mechanism is specifically a connecting flange, which includes a first flange and a second flange of the same size and shape, wherein the first flange is arranged outside the cab, and the outer edge of the first flange is connected to the inner wall of the opening of the airbag by adhesive sealing, and the second flange is arranged on the ceiling of the cab and is connected to the first flange by bolts. To ensure the sealing of the flange connection, sealing rubber rings are respectively arranged between the first flange and the roof outside the cab and between the second flange and the ceiling inside the cab, and through holes are arranged at the center positions of the first flange and the second flange, and a circular hole is arranged through the ceiling of the cab, and the circular hole is concentric and has the same diameter as the through hole.

[0020] In this embodiment, in order not to affect the normal driving of the vehicle, and a deflector structure is provided on the roof of a heavy truck, the airbag mechanism is placed in the gap between the deflector and the roof along the extension direction of the deflector. This arrangement can also protect the airbag mechanism during the movement of the vehicle, making the airbag less likely to be damaged.

[0021] When the door is stationary, the air pressure in the cab is similar to that outside, and the airbag is in a contracted state. When the door is closed, gas enters the cab. At this time, the air pressure in the cab rises instantly, which will increase the driver's ear pressure and cause ear discomfort. However, for a cab equipped with an airbag mechanism, the airbag absorbs gas expansion, which reduces the instantaneous high pressure inside the cab, and indirectly reduces the door closing force, thereby reducing the driver's ear pressure and avoiding ear discomfort caused by increased ear pressure. After the door is closed, the gas in the airbag gradually flows out of the cab through the gaps in the cab and the pressure relief valve. At the same time, the airbag retracts, and the air pressure inside the cab returns to normal.

[0022] Embodiment 2:

[0023] In this embodiment, a heavy truck model with a toolbox on the lower side of the cab is selected as the experimental object, and the airbag mechanism and the connecting mechanism are arranged in the toolbox. Since the toolbox of this model is directly connected to the cab, the operation of opening the cab is omitted. Angle, force, speed and other sensors are installed on the main driving door, and a pressure sensor is installed on the upper part of the seat inside the cab to simulate the position of the human ear.

[0024] There are two plans in total, namely:

[0025] (1) Original vehicle configuration, no airbag, tool box closed;

[0026] (2) Open the tool box on the passenger side and connect the airbag.

[0027] Open the main driving door to the first gear 40° position, push the door to close it, and record the pressure in the cab when the speed sensor detects a closing speed of 1.2m / s. Results Under solution (1), the closing pressure in the cab was about 268Pa. After changing to solution (2), the closing pressure in the cab was about 124Pa. The pressure reduction effect was very obvious. In addition, the airbag volume in this test was not large, and the airbag was not full when closing the door. A smaller airbag volume can achieve a greater pressure reduction effect. In actual application, a smaller airbag is also easier to install and configure.

[0028] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation mode. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An airbag device for reducing ear pressure when closing a cab door, characterized in that: It comprises a connecting mechanism and an airbag mechanism, wherein the connecting mechanism is used to connect the cab and the airbag mechanism, and the airbag mechanism comprises an airbag body and an airbag protection net, wherein the airbag protection net is arranged outside the airbag.

2. The airbag device for reducing ear pressure when closing the door of a cab according to claim 1, characterized in that: The connecting mechanism is specifically a connecting flange, which includes a first flange piece and a second flange piece. The outer edge of the first flange piece is sealed and connected to the inner edge of the opening of the airbag body, and the second flange piece is connected to the roof of the cab.

3. The airbag device for reducing ear pressure when closing the door of a cab according to claim 2, characterized in that: The first flange is connected to the second flange by bolts, and concentric through holes with the same diameter are arranged at the center of the first flange and the second flange. Sealing rubber rings are arranged between the first flange and the roof of the cab and between the second flange and the ceiling of the cab respectively.

4. The airbag device for reducing ear pressure when closing the door of a cab according to claim 1, characterized in that: The protective net is a retractable net structure.

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