Washing liquid backflow prevention device for liquid adding pipe of automobile washer

Abstract

The utility model discloses a vehicle washer liquid adding pipe washing liquid backflow prevention device which comprises a liquid storage tank and a liquid adding pipe, a mounting groove is formed in the side, close to the liquid storage tank, of the interior of the liquid adding pipe, a rotating shaft is arranged in the mounting groove, the exterior of the rotating shaft is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with the liquid storage tank. The side, away from the rotating shaft, of the exterior of the connecting plate is fixedly connected with an anti-backflow cover. Belongs to the technical field of automobile accessories. According to the washing liquid backflow prevention device for the liquid adding pipe of the washer for the vehicle, when a user injects washing liquid into a liquid storage tank through the liquid adding pipe, impact of the washing liquid enables a backflow prevention cover to rotate upwards to be opened, and when the user stops injecting the washing liquid, the backflow prevention cover rotates upwards to be opened due to the gravity action of a first balancing weight and a second balancing weight on the backflow prevention cover; when the automobile runs, the anti-backflow cover can rotate downwards to cover the automobile, so that the washing liquid cannot enter the liquid adding pipe due to inertia of emergency braking in the running process of the automobile, and the situation that the washing liquid rushes out of the liquid adding pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, and more specifically, to an anti-backflow device for the washing liquid of a vehicle washer liquid filling pipe. Background Art

[0002] In addition to rain, frost and snow on the vehicle windshield, there are often mud, dust, oil stains, etc. In order to scrape and wash clean, a washer is used in cooperation with a wiper to wash away the dirt.

[0003] In some current vehicle washers, since the filling pipe and the washer liquid storage tank are relatively straight, if the vehicle brakes suddenly during driving, the washer liquid in the storage tank may flow back into the filling pipe due to inertia and gush out from the liquid inlet of the filling pipe. To prevent such a situation from occurring, we have designed an anti-backflow device for the filling pipe. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-backflow device for the washing liquid of a vehicle washer liquid filling pipe to solve the problems raised in the above background art:

[0005] In some current vehicle washers, since the filling pipe and the washer liquid storage tank are relatively straight, if the vehicle brakes suddenly during driving, the washer liquid in the storage tank may flow back into the filling pipe due to inertia and gush out from the liquid inlet of the filling pipe.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti-backflow device for the washing liquid of a vehicle washer liquid filling pipe, comprising a storage tank and a filling pipe. An installation groove is arranged on one side of the inside of the filling pipe close to the storage tank. A rotating shaft is arranged inside the installation groove. The rotating shaft can rotate in the installation groove, so that the anti-backflow cover can rotate upward to open and rotate downward to close. A connecting plate is fixedly connected to the outside of the rotating shaft. A first counterweight is fixedly connected to one side of the outside of the connecting plate far away from the rotating shaft. The anti-backflow cover is fixedly connected to the outside of the connecting plate. The anti-backflow cover is used in cooperation with the filling pipe to block the liquid outlet of the filling pipe to prevent the washer liquid from gushing out due to the inertia of sudden stop during vehicle driving.

[0008] Preferably, a first counterweight is fixedly connected to one side of the outside of the anti-backflow cover close to the filling pipe, and a second counterweight is fixedly connected to one side of the outside of the anti-backflow cover far away from the filling pipe. The first counterweight and the second counterweight are integrally formed with the anti-backflow cover. Under the gravity of the first counterweight and the second counterweight, the anti-backflow cover can always be in a closed state.

[0009] Preferably, a positioning card slot is provided inside the liquid adding pipe and between the installation groove and the anti-backflow cover. The positioning card slot communicates with the installation groove and is used in cooperation with the connecting plate. Whether the anti-backflow cover is in a closed state or an open state, the connecting plate between the anti-backflow cover and the rotating shaft will always be inside the positioning card slot, which can play a limiting role and prevent the anti-backflow cover from being offset left and right from the liquid outlet of the liquid adding pipe.

[0010] Preferably, a maximum rotation angle limiting surface is provided on one side of the top of the connecting plate close to the rotating shaft, and a limiting plane is provided on the side of the installation groove away from the positioning card slot. The limiting plane is used in cooperation with the maximum rotation angle limiting surface. Through the mutual cooperation of the maximum rotation angle limiting surface and the limiting plane, the rotation opening angle of the anti-backflow cover can be made less than 90 degrees.

[0011] Preferably, a reinforcing rib is fixedly connected between the top of the connecting plate and between the anti-backflow cover and the maximum rotation angle limiting surface. The reinforcing rib can improve the load-bearing capacity of the connection surface between the anti-backflow cover and the connecting plate, as well as between the connecting plate and the rotating shaft, avoid breakage, and help extend the overall service life.

[0012] Preferably, the cross-section of the installation groove is a circular structure, and the installation groove with a circular cross-section is adapted to the rotating shaft, so that the outer side wall of the rotating shaft is closely attached to the inner side wall of the installation groove, which can play a role in limiting the rotating shaft, prevent the radial movement of the rotating shaft, and further avoid the situation that the anti-backflow cover is offset from the liquid outlet of the liquid adding pipe, ensuring the anti-backflow effect.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] When the vehicle washer liquid adding pipe anti-washer liquid backflow device is in use, when the user fills the washer liquid into the liquid storage tank through the liquid adding pipe, the impact of the washer liquid will cause the anti-backflow cover to rotate upward and open. When the user stops filling the washer liquid, due to the gravity of the first counterweight block and the second counterweight block on the anti-backflow cover, the anti-backflow cover will rotate downward and close, so that the washer liquid will not enter the liquid adding pipe due to the inertia of emergency braking during the driving of the vehicle, thus avoiding the situation of the washer liquid gushing out from the liquid adding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 is a schematic sectional view of the whole of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the anti-backflow cover of the present utility model when it is closed;

[0018] Figure 4 Schematic diagram of the structure when the anti-backflow cover of the present utility model is opened;

[0019] Figure 5 Schematic diagram of the structure of the positioning card slot of the present utility model;

[0020] Figure 6 Schematic diagram of the structure of the limiting plane of the present utility model;

[0021] Figure 7 Schematic diagram of the structure of the anti-backflow cover of the present utility model;

[0022] Figure 8 Schematic diagram of the structure of the maximum rotation angle limiting surface of the present utility model.

[0023] Explanation of the reference numerals in the figure: 1, liquid storage tank; 2, liquid adding pipe; 3, installation groove; 4, rotating shaft; 5, connecting plate; 6, anti-backflow cover; 7, first counterweight; 8, second counterweight; 9, positioning card slot; 10, maximum rotation angle limiting surface; 11, limiting plane; 12, reinforcing rib. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 to 8 , a device for preventing the backflow of washing liquid in a vehicle washer liquid adding pipe, including a liquid storage tank 1 and a liquid adding pipe 2. An installation groove 3 is provided on one side of the inner part of the liquid adding pipe 2 close to the liquid storage tank 1. A rotating shaft 4 is arranged inside the installation groove 3. The rotating shaft 4 can rotate in the installation groove 3, so that the anti-backflow cover 6 can rotate upward to open and rotate downward to close. A connecting plate 5 is fixedly connected to the outside of the rotating shaft 4. A anti-backflow cover 6 is fixedly connected to the side of the outside of the connecting plate 5 away from the rotating shaft 4. The anti-backflow cover 6 is used in cooperation with the liquid adding pipe 2 to block the liquid outlet of the liquid adding pipe 2 and prevent the washing liquid in the liquid storage tank 1 from gushing out from the liquid adding pipe 2 due to the inertia during the driving of the vehicle.

[0026] Further, a first counterweight 7 is fixedly connected to one side of the external part of the anti-backflow cover 6 close to the liquid adding pipe 2, and a second counterweight 8 is fixedly connected to the other side of the external part of the anti-backflow cover 6 away from the liquid adding pipe 2. The first counterweight 7 and the second counterweight 8 are integrally formed with the anti-backflow cover 6. Under the action of the gravity of the first counterweight 7 and the second counterweight 8, the anti-backflow cover 6 can always be in a closed state, so as to achieve the purpose of preventing backflow.

[0027] Further, a positioning card slot 9 is formed inside the liquid adding pipe 2 and between the installation groove 3 and the anti-backflow cover 6. The positioning card slot 9 is communicated with the installation groove 3 and is used in cooperation with the connecting plate 5. Whether the anti-backflow cover 6 is in a closed state or an open state, the connecting plate 5 between the anti-backflow cover 6 and the rotating shaft 4 will always be inside the positioning card slot 9, so that the rotating shaft 4 in the installation groove 3 will not move axially, thereby preventing the anti-backflow cover 6 from being misaligned left and right with the liquid outlet of the liquid adding pipe 2.

[0028] Further, a maximum rotation angle limiting surface 10 is arranged on one side of the top of the connecting plate 5 close to the rotating shaft 4, and a limiting plane 11 is arranged on the side of the inside of the installation groove 3 away from the positioning card slot 9. The limiting plane 11 is used in cooperation with the maximum rotation angle limiting surface 10. By the mutual cooperation of the maximum rotation angle limiting surface 10 and the limiting plane 11, the rotation angle of the anti-backflow cover 6 can be limited, so that the rotation angle at which the anti-backflow cover 6 can be rotated and opened is less than 90 degrees.

[0029] Further, a reinforcing rib 12 is fixedly connected between the top of the connecting plate 5 and between the anti-backflow cover 6 and the maximum rotation angle limiting surface 10. The reinforcing rib 12 can improve the load-bearing capacity at the connection surfaces between the anti-backflow cover 6 and the connecting plate 5, and between the connecting plate 5 and the rotating shaft 4, improve the overall strength, avoid the occurrence of fracture, and help to extend the overall service life.

[0030] Further, the cross-section of the installation groove 3 is a circular structure. The installation groove 3 with a circular cross-section is adapted to the rotating shaft 4, so that the outer side wall of the rotating shaft 4 is closely attached to the inner side wall of the installation groove 3, which can play a role in limiting the rotating shaft 4 and preventing the rotating shaft 4 from moving radially. Furthermore, it can avoid the situation that the anti-backflow cover 6 is misaligned with the liquid outlet of the liquid adding pipe 2, and can ensure the sealing performance between the anti-backflow cover 6 and the liquid adding pipe 2 and guarantee the anti-backflow effect.

[0031] Usage steps of the present utility model: When the anti-backflow device for the washer fluid filling pipe of this vehicle is in use, when the user fills the washer fluid into the storage tank 1 through the filling pipe 2, the impact of the washer fluid will cause the anti-backflow cover 6 to rotate upward and open. At this time, the washer fluid flows into the storage tank 1. When the user stops filling the washer fluid, due to the gravitational action of the first counterweight 7 and the second counterweight 8 on the anti-backflow cover 6, the anti-backflow cover 6 will rotate downward to close. Even when the vehicle makes an emergency brake during driving, the anti-backflow cover 6 will block the washer fluid, so that the washer fluid will not enter the filling pipe 2 due to inertia, thus avoiding the situation where the washer fluid gushes out from the filling pipe 2.

[0032] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for preventing washing liquid from flowing back through a liquid filling pipe of a vehicle washer, comprising a liquid storage tank (1) and a liquid filling pipe (2), characterized in that: A mounting groove (3) is provided on the side of the liquid adding pipe (2) close to the liquid storage tank (1), a rotating shaft (4) is provided on the inside of the mounting groove (3), a connecting plate (5) is fixedly connected to the outside of the rotating shaft (4), and a backflow prevention cover (6) is fixedly connected to the side of the connecting plate (5) away from the rotating shaft (4), and the backflow prevention cover (6) is used in conjunction with the liquid adding pipe (2).

2. The device for preventing washing liquid from flowing back into a liquid filling pipe of a vehicle washing machine according to claim 1, characterized in that: A first counterweight (7) is fixedly connected to the side of the anti-backflow cover (6) that is close to the liquid adding pipe (2), and a second counterweight (8) is fixedly connected to the side of the anti-backflow cover (6) that is away from the liquid adding pipe (2). The first counterweight (7) and the second counterweight (8) are both integrally formed with the anti-backflow cover (6).

3. The device for preventing washing liquid from flowing back into a liquid filling pipe of a vehicle washing machine according to claim 1, characterized in that: A positioning slot (9) is provided inside the liquid adding pipe (2) and between the mounting groove (3) and the anti-backflow cover (6); the positioning slot (9) is communicated with the mounting groove (3); and the positioning slot (9) is used in conjunction with the connecting plate (5).

4. The device for preventing washing liquid from flowing back into a liquid filling pipe of a vehicle washing machine according to claim 1, characterized in that: A maximum rotation angle limiting surface (10) is provided on the top of the connecting plate (5) on the side close to the rotating shaft (4), and a limiting plane (11) is provided inside the mounting groove (3) on the side away from the positioning slot (9), and the limiting plane (11) is used in conjunction with the maximum rotation angle limiting surface (10).

5. The device for preventing washing liquid from flowing back into a liquid filling pipe of a vehicle washing machine according to claim 4, characterized in that: A reinforcing rib (12) is fixedly connected to the top of the connecting plate (5) and is located between the anti-backflow cover (6) and the maximum rotation angle limit surface (10).

6. The device for preventing washing liquid from flowing back into a liquid filling pipe of a vehicle washing machine according to claim 1, characterized in that: The cross section of the installation groove (3) is a circular structure.

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