Liquid storage tank

Abstract

The utility model relates to a liquid storage tank which comprises a tank body defining an inner space and a filling pipe extending out of the top wall of the tank body, the lower end of the filling pipe is communicated into the inner space of the tank body through a communication opening in the top wall of the tank body, and the upper end of the filling pipe can be closed by means of a cover. A blocking structure is arranged in the tank body and used for at least partially blocking liquid contained in the tank body from splashing towards the direction of the cover through the communication opening. Through the blocking structure, even if the length of the filling pipe is short and / or the included angle between the filling pipe and the normal of the top wall of the liquid storage tank is large, the risk that liquid in the liquid storage tank leaks through the air hole of the cover can be effectively reduced.

Description

Technical Field

[0001] The present application relates to a fluid reservoir, in particular to a brake fluid reservoir used in a vehicle. Background Art

[0002] Liquid storage tanks for storing liquids are widely used in all walks of life. In the automotive industry, brake fluid storage tanks are one of the important components of the automotive braking system, which are used to store brake fluid and provide brake fluid to the braking system, and can also provide brake fluid to the clutch system when necessary. Such a liquid storage tank usually includes a tank body defining an internal space and a filling pipe extending from the top wall of the tank body, the lower end of the filling pipe is connected to the internal space of the tank body through a connecting port in the top wall of the tank body, and the upper end of the filling pipe can be closed by means of a lid. However, in order to enable the liquid contained in the liquid storage tank to be discharged smoothly, the lid is usually provided with air holes so that the internal space of the liquid storage tank is connected to the atmosphere. Since the car will experience very complex road conditions and working conditions during driving, the liquid in the liquid storage tank will shake and splash violently with the tilting, bumping, acceleration, braking, etc. of the car. If the liquid in the liquid storage tank splashes toward the lid, liquid leakage will inevitably occur due to the presence of air holes in the lid, which is undesirable.

[0003] In order to reduce the risk of liquid leakage in the prior art, the filling pipe must usually have a certain length and be as perpendicular to the top wall of the liquid storage tank as possible, so that the liquid in the liquid storage tank is as difficult as possible to reach the cover.

[0004] However, due to the limitation of the installation space in the automobile, especially the installation height, it is usually necessary to limit the length of the filling pipe. In order to further reduce the installation height, it is necessary to increase the angle of the filling pipe relative to the normal line of the top wall of the liquid storage tank.

[0005] However, experiments show that the shorter the length of the filling pipe, the higher the risk of liquid leakage in the liquid storage tank. At the same time, when the length of the filling pipe is the same, the larger the angle between the filling pipe and the normal line of the top wall of the liquid storage tank, the higher the risk of liquid leakage in the liquid storage tank. Utility Model Content

[0006] One aspect of the present application is to provide a liquid storage tank, which includes a tank body defining an internal space and a filling pipe extending from the top wall of the tank body, wherein the lower end of the filling pipe passes into the internal space of the tank body through a connecting port in the top wall of the tank body, and the upper end of the filling pipe can be closed by means of a lid. Here, a blocking structure is provided in the tank body for at least partially blocking the liquid contained in the tank body from splashing toward the lid through the connecting port. Through the blocking structure, even when the length of the filling pipe is short and / or the angle between the filling pipe and the normal line of the top wall of the liquid storage tank is large, the risk of leakage of the liquid in the liquid storage tank through the pores of the lid can be effectively reduced.

[0007] Optionally, a boss is formed in the tank body below the communication port as the blocking structure, wherein the upper surface of the boss is not lower than the maximum liquid level of the liquid storage tank. Thus, when liquid not exceeding the maximum liquid level is injected into the liquid storage tank, there is substantially no liquid on the boss below the communication port. Thus, even when the liquid in the liquid storage tank shakes and splashes violently, at least not much liquid near the communication port can splash toward the direction of the lid through the communication port, thereby effectively reducing the risk of the liquid in the liquid storage tank leaking through the air holes of the lid.

[0008] Optionally, the projection of the communication port in the plane defined by the upper surface of the boss along the extension direction of the filling pipe is completely located within the upper surface of the boss. Thus, the communication port is completely covered by the upper surface of the boss in the extension direction of the filling pipe, so that almost no liquid can splash toward the cover in a straight line, thereby reducing the risk of liquid in the liquid storage tank leaking through the air hole of the cover.

[0009] Optionally, the orthographic projection of the communication port in the plane defined by the upper surface of the boss is completely located within the upper surface of the boss. Thus, the communication port is completely covered by the upper surface of the boss in the vertical direction, further reducing the risk of liquid in the liquid storage tank leaking through the air hole of the cover.

[0010] Optionally, the boss is formed by a partially concave bottom wall of the can body.

[0011] Alternatively, the boss is formed by a platform supported in the tank body by means of a support. Compared with forming the boss by a partially recessed bottom wall of the tank body, forming the boss by a platform supported in the tank body by means of a support does not significantly reduce the effective volume of the liquid storage tank. Here, the platform can be supported on the bottom wall of the liquid storage tank by means of a support. Alternatively, the platform can also be supported on the side wall or top wall of the liquid storage tank by means of a support.

[0012] Optionally, the boss has a surrounding retaining rib protruding from the upper surface of the boss, and the retaining rib has a liquid channel, so that the liquid accumulated on the boss can flow down the boss through the liquid channel. The retaining rib is further raised relative to the upper surface of the boss, so that the liquid around the boss can be further blocked from splashing toward the cover.

[0013] Optionally, the retaining rib extends upward to the top wall of the tank body, thereby substantially surrounding the communication port, and making it difficult for liquid around the boss to reach the lid through the liquid channel in the retaining rib.

[0014] As an additional or alternative solution to the boss, a suspended retaining ring is provided on the top wall of the tank body around the communication port as the retaining structure, and the retaining ring extends downward up to the maximum liquid level of the liquid storage tank, thereby substantially preventing the liquid around the retaining ring from splashing toward the cover.

[0015] Optionally, the retaining ring is formed into a funnel shape that contracts downwards, so that liquid is also difficult to splash from below the retaining ring toward the direction of the cover.

[0016] Optionally, a through hole is provided in the wall of the retaining ring. Thus, the filling efficiency of the liquid storage tank will not be affected, especially when the retaining ring is formed into a downwardly contracted funnel shape. At the same time, it is difficult for the liquid to splash toward the cover through the through hole in the wall of the retaining ring.

[0017] Optionally, the tank body has a plurality of first guide plates extending from the side wall of the tank body toward the inner space of the tank body, wherein the height of the first guide plates is not lower than the maximum liquid level of the liquid storage tank. The first guide plates restrict the free flow of liquid in the liquid storage tank to a certain extent, thereby reducing the splash height of the liquid in the liquid storage tank.

[0018] Optionally, the boss has a plurality of second guide plates extending from the side wall of the boss toward the inner space of the tank body, wherein the height of the second guide plates is not lower than the maximum liquid level of the liquid storage tank. The second guide plates also restrict the free flow of liquid in the liquid storage tank to a certain extent, thereby reducing the splash height of the liquid in the liquid storage tank.

[0019] Optionally, the angle between the filling pipe and the normal line of the top wall of the liquid storage tank is not less than 30°, in particular not less than 60°, thereby reducing the installation height of the liquid storage tank.

[0020] Optionally, the fluid reservoir is a brake fluid reservoir. However, the fluid reservoir is not limited to a brake fluid reservoir, but may be any fluid reservoir for storing fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings, but those skilled in the art will appreciate that these drawings are only used for the purpose of explaining the embodiments and should not be used as a limitation on the scope of the present application. The accompanying drawings show:

[0022] Figure 1 is a perspective view of a prior art liquid storage tank;

[0023] Figure 2 is a schematic diagram of a fluid storage tank with different filler pipe angles;

[0024] Figure 3 is a cross-sectional view of a liquid storage tank according to an embodiment of the present application;

[0025] Figure 4 is a perspective view of the internal structure of a liquid storage tank according to an embodiment of the present application;

[0026] Figure 5 is a cross-sectional view of a liquid storage tank according to an embodiment of the present application;

[0027] Figure 6 is a cross-sectional view of a liquid storage tank according to an embodiment of the present application;

[0028] Figure 7 is a perspective view of the internal structure of a liquid storage tank according to an embodiment of the present application;

[0029] Figure 8 is a cross-sectional view of a liquid storage tank according to an embodiment of the present application;

[0030] Fig. 9 is a cross-sectional view of a liquid storage tank according to an embodiment of the present application; and

[0031] Fig.10 is a perspective view of a liquid storage tank according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] Figure 1 A perspective view of a prior art liquid storage tank is shown. Figure 1 As shown, the liquid storage tank 100 includes a tank body 10 defining an internal space and a filling pipe 20 extending from a top wall 11 of the tank body 10, wherein the lower end of the filling pipe 20 passes through a communication port 13 (at the top wall 11 of the tank body 10) in the top wall 11 of the tank body 10. Figure 33 ) is passed into the inner space of the tank body 10, and the upper end of the filling pipe 20 can be closed by means of a cover 30. In addition, a liquid outlet pipe 40 is provided at the lower part of the tank body 10 of the liquid reservoir 100, and the liquid contained in the liquid reservoir 100 can be discharged through the liquid outlet pipe 40. When the liquid reservoir 100 is a brake fluid reservoir used in a vehicle brake system, the brake fluid contained in the brake fluid reservoir can be supplied to the vehicle brake system via the liquid outlet pipe 40. If necessary, the brake fluid reservoir can also have an additional liquid outlet pipe for supplying brake fluid to a clutch system.

[0033] In order to allow the liquid contained in the liquid storage tank 100 to be discharged smoothly through the liquid outlet pipe 40, the cover 30 generally has an air hole (in Figure 1 (not shown), thereby enabling the internal space of the liquid storage tank 100 to be connected to the atmosphere to achieve pressure balance, so that the liquid contained in the liquid storage tank 100 can be smoothly discharged through the liquid outlet pipe 40.

[0034] Figure 2 Schematic diagrams of liquid storage tanks with different filler pipe angles are shown. Figure 2 As can be seen in the figure, the cover 30 of each liquid storage tank 100 has an air hole 31, thereby connecting the internal space of the liquid storage tank 100 to the atmosphere to achieve pressure balance. Figure 2 In the figure, the angle between the filling pipe 20 of the liquid storage tank 100 in the upper left figure and the normal of the top wall 11 of the tank body 10 of the liquid storage tank 100 is 0°, that is, the filling pipe 20 is completely perpendicular to the top wall 11 of the tank body 10 of the liquid storage tank 100; the angle between the filling pipe 20 of the liquid storage tank 100 in the upper right figure and the normal of the top wall 11 of the tank body 10 of the liquid storage tank 100 is 15°; the angle between the filling pipe 20 of the liquid storage tank 100 in the lower left figure and the normal of the top wall 11 of the tank body 10 of the liquid storage tank 100 is 30°; the angle between the filling pipe 20 of the liquid storage tank 100 in the lower right figure and the normal of the top wall 11 of the tank body 10 of the liquid storage tank 100 is 45°. It can be clearly seen from the figure that, when other conditions (such as the length of the filling pipe, the degree of liquid shaking and splashing) are the same, as the angle increases, the liquid in the liquid storage tank 100 is more likely to reach the air hole 31 of the cover 30, thereby more likely to cause liquid leakage.

[0035] In order to effectively reduce the risk of liquid in the liquid storage tank 100 leaking through the air hole 31 of the cover 30, it is proposed to provide a blocking structure in the tank body 10 for at least partially blocking the liquid contained in the tank body 10 from splashing toward the cover 30 through the connecting port 13.

[0036] Figure 3 A cross-sectional view of a liquid storage tank according to an embodiment of the present application is shown. Figure 3 It can be seen that in the tank body 10, a boss 50 is formed below the communication port 13 as the blocking structure, wherein the upper surface of the boss 50 is not lower than the maximum liquid level of the reservoir 100. It should be noted that the reservoir 100 usually has a minimum liquid level and a maximum liquid level. When the reservoir 100 is a brake fluid reservoir, in order to allow the normal operation of the automobile, the liquid level of the brake fluid added to the brake fluid reservoir should exceed the minimum liquid level but not exceed the maximum liquid level. When the brake fluid in the brake fluid reservoir is lower than the minimum liquid level, the brake fluid should be replenished in time to ensure that the automobile brake system can operate normally. By making the upper surface of the boss 50 not lower than the maximum liquid level of the reservoir 100, when liquid not exceeding the maximum liquid level is injected into the reservoir 100, there is basically no liquid on the boss 50 below the communication port 13, that is, the liquid below the communication port 13 in the reservoir 100 is displaced by the boss 50, thereby keeping the liquid away from the communication port 13. In this way, even when the liquid in the liquid storage tank 100 shakes and splashes violently, at least not much liquid near the connecting port 13 can splash toward the cover 30 through the connecting port 13, thereby effectively reducing the risk of the liquid in the liquid storage tank 100 leaking through the air hole 31 of the cover 30.

[0037] Here, the projection of the communication port 13 in the plane defined by the upper surface of the boss 50 along the extension direction of the filling pipe 20 is preferably completely located within the upper surface of the boss 50. Thus, the communication port 13 is completely covered by the upper surface of the boss 50 in the extension direction of the filling pipe 20, so that almost no liquid can splash straight toward the cover 30, thereby reducing the risk of the liquid in the liquid storage tank 100 leaking through the air hole 31 of the cover 30. Advantageously, the orthographic projection of the communication port 13 in the plane defined by the upper surface of the boss 50 is completely located within the upper surface of the boss 50. Thus, the communication port 13 is also completely covered by the upper surface of the boss 50 in the vertical direction, further reducing the risk of the liquid in the liquid storage tank 100 leaking through the air hole 31 of the cover 30. Figure 3It is shown in the figure that the dimension of the boss 50 in the horizontal direction exceeds the dimension of the communication port 13 in the horizontal direction, so that at least in the horizontal direction, the projection of the communication port 13 in the plane defined by the upper surface of the boss 50 along the extension direction of the filling pipe 20 and the orthographic projection in the plane defined by the upper surface of the boss 50 are completely located in the upper surface of the boss 50. Although it is not clearly shown in the figure, it is easy to understand that the dimension of the boss 50 in the direction perpendicular to the plane of the drawing is preferably also greater than the dimension of the communication port 13 in the direction perpendicular to the plane of the drawing. In this way, it is achieved that in the direction perpendicular to the plane of the drawing, the projection of the communication port 13 in the plane defined by the upper surface of the boss 50 along the extension direction of the filling pipe 20 and the orthographic projection in the plane defined by the upper surface of the boss 50 are also completely located in the upper surface of the boss 50.

[0038] In addition, Figure 3 , Figure 4 and Figure 5 In the embodiment shown, the boss 50 is formed by a partially concave bottom wall 12 of the can body 10. Figure 6 and 7 In the embodiment shown, the boss 50 is formed by a platform 53 supported in the tank 10 by means of a support 54. Figure 6 and 7 In the embodiment shown, the platform 53 is supported on the bottom wall 12 of the tank body 10 by means of the support member 54. However, this is merely exemplary and not necessary. The platform 53 may also be supported on the side wall or top wall 11 of the tank body 10 by means of the support member 54. Figures 3 to 5 Compared with the formation of the boss 50 by the partially concave bottom wall 12 of the tank body 10, the formation of the boss 50 by the platform 53 supported in the tank body 10 by means of the support member 54 will not significantly reduce the effective volume of the liquid storage tank 100, because the space under the boss 50 is fully utilized. Therefore, with the same external dimensions, more liquid can be stored in the liquid storage tank 100, or in order to accommodate the same amount of liquid, the size of the liquid storage tank 100 can be designed to be smaller.

[0039] exist Figure 4 , Figure 5 , Figure 6 and Figure 7It can be clearly seen in the illustrated embodiment that the boss 50 has a surrounding retaining rib 51 protruding from the upper surface of the boss 50, and the retaining rib 51 has a liquid channel 52, so that the liquid accumulated on the boss 50 can flow down the boss 50 through the liquid channel 52. By further raising the retaining rib 51 relative to the upper surface of the boss 50, the liquid around the boss 50 can be further prevented from splashing toward the cover 30.

[0040] exist Figure 5 and Figure 6 In the illustrated embodiment, the retaining rib 51 extends upward to the top wall 11 of the tank body 10 . Thus, the retaining rib 51 substantially surrounds the communication port 13 . It is difficult for liquid around the boss 50 to reach the lid 30 through the liquid channel 52 in the retaining rib 51 .

[0041] Figure 8 A cross-sectional view of a liquid storage tank according to an embodiment of the present application is shown. Figure 8 It can be seen that a suspended retaining ring 14 is provided around the communicating port 13 on the top wall 11 of the tank body 10 as the retaining structure, and the retaining ring 14 extends downward up to the maximum liquid level of the liquid storage tank 100. Figure 8 In the embodiment shown, the retaining ring 14 is substantially hollow cylindrical.

[0042] Fig. 9 A cross-sectional view of a liquid storage tank according to an embodiment of the present application is shown. Fig. 9 As can be seen in the figure, the retaining ring 14 is formed into a funnel shape that contracts downward, so that the end facing the liquid in the tank body 10 becomes smaller.

[0043] exist Figure 8 and Fig. 9 In the illustrated embodiment, the bottom of the retaining ring 14 may be open to allow liquid to enter the inner space of the tank body 10 .

[0044] However, alternatively, the bottom of the baffle ring 14 can also be closed by a bottom wall, and a through hole is provided in the bottom wall and / or the side wall of the baffle ring 14, through which the liquid can enter the inner space of the tank body 10. This makes it more difficult for the liquid to splash toward the lid 30 through the through hole in the baffle ring 14.

[0045] Fig.10 A perspective view of a liquid storage tank according to one embodiment of the present application is shown. Fig.10It can be seen that the tank body 10 has a plurality of first guide plates 15 extending from the side wall of the tank body 10 toward the internal space of the tank body 10, wherein the height of the first guide plates 15 is not lower than the maximum liquid level of the liquid storage tank 100. In addition, the boss 50 has a plurality of second guide plates 55 extending from the side wall of the boss 50 toward the internal space of the tank body 10, wherein the height of the second guide plates 55 is not lower than the maximum liquid level of the liquid storage tank 100. The first guide plates 15 and the second guide plates 55 can be arranged staggered with each other. Here, the first guide plates 15 and the second guide plates 55 restrict the free flow of liquid in the liquid storage tank to a certain extent, and thereby reduce the splash height of the liquid in the liquid storage tank to a certain extent.

[0046] Although in Fig.10 In the illustrated embodiment, the first guide vane 15 and the second guide vane 55 are provided at the same time, but this is not necessary. The first guide vane 15 may be provided only on the side wall of the tank body 10 or the second guide vane 55 may be provided only on the side wall of the boss 50 .

[0047] The provision of the first guide plate 15 and / or the second guide plate 55 also strengthens the structure of the tank body 10 .

[0048] The above is only an exemplary implementation of the present application, and the protection scope of the present application is not limited to the above implementation. All technical solutions under the concept of the present application belong to the protection scope of the present application. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present application should also be regarded as the protection scope of the present application.

Claims

1. A liquid storage tank (100), comprising a tank body (10) defining an internal space and a filling pipe (20) extending from a top wall (11) of the tank body (10), wherein the lower end of the filling pipe (20) is connected to the internal space of the tank body (10) through a communication port (13) in the top wall (11) of the tank body (10), and the upper end of the filling pipe (20) can be closed by means of a cover (30), characterized in that: A blocking structure is provided in the tank body (10) for at least partially blocking the liquid contained in the tank body (10) from splashing toward the cover (30) via the communication port (13).

2. The liquid storage tank (100) according to claim 1, characterized in that: A boss (50) is formed in the tank body (10) below the communication port (13) as the blocking structure, wherein the upper surface of the boss (50) is not lower than the maximum liquid level of the liquid storage tank (100).

3. The liquid storage tank (100) according to claim 2, characterized in that: A projection of the communication port (13) along the extension direction of the filling pipe (20) in a plane defined by the upper surface of the boss (50) is completely located within the upper surface of the boss (50).

4. The liquid storage tank (100) according to claim 3, characterized in that: The orthographic projection of the communication port (13) in the plane defined by the upper surface of the boss (50) is completely located within the upper surface of the boss (50).

5. The liquid storage tank (100) according to claim 2, characterized in that: The boss (50) is formed by a partially concave bottom wall (12) of the can body (10).

6. The liquid storage tank (100) according to claim 2, characterized in that: The boss (50) is formed by a platform (53) supported in the tank (10) by means of a support (54).

7. The liquid storage tank (100) according to claim 2, characterized in that: The boss (50) has a surrounding rib (51) protruding from the upper surface of the boss (50), and the rib (51) has a liquid channel (52), so that liquid accumulated on the boss (50) can flow down the boss (50) via the liquid channel (52).

8. The liquid storage tank (100) according to claim 7, characterized in that: The retaining rib (51) extends upwards to the top wall (11) of the tank body (10).

9. The liquid storage tank (100) according to claim 1, characterized in that: A suspended retaining ring (14) is provided on the top wall (11) of the tank body (10) around the connecting port (13) as the retaining structure, and the retaining ring (14) extends downward up to the maximum liquid level of the liquid storage tank (100).

10. The liquid storage tank (100) according to claim 9, characterized in that: The retaining ring (14) is formed into a funnel shape that contracts downward.

11. The liquid storage tank (100) according to claim 10, characterized in that: A through hole is arranged in the wall of the retaining ring.

12. The liquid storage tank (100) according to claim 1, characterized in that: The tank body (10) has a plurality of first guide plates (15) extending from a side wall of the tank body (10) toward an internal space of the tank body (10), wherein a height of the first guide plates (15) is not lower than a maximum liquid level of the liquid storage tank (100).

13. The liquid storage tank (100) according to claim 5, characterized in that: The boss (50) has a plurality of second guide plates (55) extending from the side wall of the boss (50) toward the internal space of the tank body (10), wherein the height of the second guide plates (55) is not lower than the maximum liquid level of the liquid storage tank (100).

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