JP2021154818A - Liquid storage device and vehicle - Google Patents

Abstract

To provide a liquid storage device which can prevent a liquid surface from inclining relative to a tank, and to provide a vehicle.SOLUTION: A liquid storage device includes: a tank which is mounted on a vehicle and stores a liquid; a plate which is disposed so as to cover a liquid surface of the liquid in the tank from the side of a ceiling part of the tank; and a guide part which restricts the plate from tilting relative to the tank and guides the plate so that the plate moves between the ceiling part and a bottom part of the tank.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to liquid storage devices and vehicles.

For example, in a tank mounted on a vehicle and storing fuel, a baffle plate extending inward from the wall of the tank is known. By arranging the baffle plate in the tank, the fuel swinging in the tank collides with the baffle plate and does not collide directly with the inner wall of the tank. This makes it possible to reduce noise and impact.

For example, Patent Document 1 discloses a baffle plate arranged so as to hang down from the ceiling of a tank.

Japanese Unexamined Patent Publication No. 2014-84751

By the way, the baffle plate described in Patent Document 1 cannot prevent the inclination of the liquid level of the fuel in the tank.

For example, in a tank of the type that sucks fuel in the tank by a pipe having a suction port arranged near the bottom of the tank, when the liquid level is tilted with respect to the tank, the liquid level is from the position of the suction port of the pipe. It may come off. As a result, there is a problem that the fuel may not be sucked up.

Further, for example, repeated acceleration / deceleration of the vehicle may cause sloshing in which the liquid level of the liquid in the tank fluctuates due to relatively long-term vibration from the outside. There is a problem that the tank may be destroyed due to the occurrence of sloshing.

An object of the present disclosure is to provide a liquid storage device and a vehicle capable of preventing the liquid level from tilting with respect to the tank.

In order to achieve the above object, the liquid storage device in the present disclosure is
A tank that is mounted on the vehicle and stores liquid,
A plate arranged so as to cover the liquid level of the liquid in the tank from the ceiling side of the tank,
A guide portion that regulates the plate so as not to tilt with respect to the tank and guides the plate to move between the ceiling portion and the bottom portion of the tank.
To be equipped.

The vehicle in the present disclosure includes the above liquid storage device.

According to the present disclosure, it is possible to prevent the liquid level from tilting with respect to the tank.

FIG. 1 is a perspective view schematically showing a liquid storage device according to an embodiment of the present disclosure. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a diagram showing a liquid storage device according to a comparative example. FIG. 4A is a diagram showing an example of the operation of the plate according to the present embodiment. FIG. 4B is a diagram showing an example of the operation of the plate according to the present embodiment. FIG. 4C is a diagram showing an example of the operation of the plate according to the present embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
FIG. 1 is a perspective view schematically showing a liquid storage device 10 according to an embodiment of the present disclosure. FIG. 2 is a cross-sectional view taken along the line AA of FIG. In addition, in FIG. 2, the X-axis, the Y-axis and the Z-axis are drawn. In the following description, the left-right direction in FIG. 2 is referred to as the X direction or the longitudinal direction, the right direction is "+ X direction" or "one end side in the longitudinal direction", and the left direction is "-X direction" or "the other end side in the longitudinal direction". That is. Further, the vertical direction in FIG. 2 is referred to as a Y direction or a height direction, an upward direction is "+ Y direction" or "one end side in the height direction", and a downward direction is "-Y direction" or "the other end side in the height direction". That is. Further, in FIG. 2, the direction perpendicular to the paper surface is referred to as the Z direction or the short direction, the front direction is the "+ Z direction" or the "one end side of the short direction", and the back direction is the "-Z direction" or the "short direction". It is called "end side".

As shown in FIGS. 1 and 2, the liquid storage device 10 includes a tank 1, a liquid suction unit 2, a guide unit 3, and a plate 4.

The tank 1 has a rectangular parallelepiped shape. The tank 1 has a wall portion 1a located on one end side (+ X direction) in the longitudinal direction and a wall portion 1b located on the other end side (−X direction) in the longitudinal direction, facing each other in the longitudinal direction (X direction). Further, the tank 1 faces each other in the height direction (Y direction), and the wall portion 1c located on one end side (+ Y direction) in the height direction and the wall portion located on the other end side (−Y direction) in the height direction. Has 1d. Further, the tanks 1 face each other in the lateral direction (Z direction), and the wall portion 1e located on one end side (+ Z direction) in the lateral direction and the wall portion located on the other end side (−Z direction) in the lateral direction. It has 1f. In the following description, the wall portion 1c is also referred to as a “ceiling portion”. Further, the wall portion 1d is also referred to as a "bottom portion".

The liquid suction unit 2 has a pipe 2a and a fuel pump (not shown). The other end side (−Y direction) of the pipe 2a in the height direction has a suction port 2c. The suction port 2c is arranged in the vicinity of the wall portion 1d (bottom portion). The pipe 2a extends from the suction port 2c to one end side (+ Y direction) in the height direction. One end 2b of the pipe 2a in the height direction is connected to the fuel pump. The liquid suction unit 2 does not necessarily have to have a fuel pump. The fuel pump is arranged outside the liquid suction unit 2, and the liquid suction unit 2 has a suction pipe, a return pipe, and a position sensor (float). You may.

FIG. 3 is a diagram showing a liquid storage device according to a comparative example. For example, when the tank 1 is tilted with respect to the horizontal axis when the vehicle travels on a ramp, the liquid level L1 is kept horizontal and therefore tilts with respect to the tank 1. The baffle plate 5 cannot prevent the liquid level L1 from tilting with respect to the tank 1. Therefore, the liquid level L1 may come off from the position of the suction port 2c of the pipe 2a. As a result, there is a problem that the fuel L may not be sucked up.

In the embodiment of the present disclosure, as shown in FIGS. 1 and 2, the liquid storage device 10 includes a guide portion 3 and a plate 4.

The guide portions 3 are arranged at the four corners inside the tank 1. The guide portion 3 is a rod-shaped body having a predetermined outer diameter, and extends in the height direction (Y direction). The upper end portion 3a of the guide portion 3 is fixed to the wall portion 1c (ceiling portion). The lower end portion 3b of the guide portion 3 is fixed to the wall portion 1d (bottom portion).

The plate 4 has a rectangular outer shape so as to cover the liquid level L1 of the fuel L in the tank 1 from the wall portion 1c (ceiling portion) side. The plate 4 is made of a resin material. The specific density of the plate 4 is smaller than the specific density of the fuel L. As a result, the plate 4 is arranged so as to float on the liquid surface L1.

A recess 4b is arranged at the corner 4a of the plate 4. The recess 4b is cut out in an arc shape having a predetermined diameter. By fitting the recess 4b into the guide portion 3, the plate 4 is guided by the guide portion 3 so as to move in the height direction (Y direction), and the plate 4 is regulated so as not to tilt with respect to the tank 1. Will be done. In other words, the plate 4 can be moved between the wall portion 1c (ceiling portion) and the wall portion 1d (bottom portion) by the guide portion 3 while maintaining a posture parallel to the wall portion 1d (bottom portion). .. Since the plate 4 is allowed to move in the height direction by the guide portion 3, the guide portion 3 and the recess 4b are fitted with a gap (gap fit). As a result, the plate 4 can be tilted with respect to the tank 1 (guide portion 3) according to the size of the gap between the guide portion 3 and the recess 4b. Here, "the plate 4 does not tilt with respect to the tank 1" means that the plate 4 can tilt at a predetermined angle with respect to the tank 1 according to the size of the gap between the guide portion 3 and the recess 4b, but at a predetermined angle. The above means that it does not tilt.

An insertion hole 4c is arranged in the central portion of the plate 4. A pipe 2a is inserted into the insertion hole 4c. As a result, when the plate 4 moves in the height direction (Y direction), the pipe 2a is inserted relatively into the insertion hole 4c.

At the four corners of the plate 4, convex portions 4d protruding toward the wall portion 1d (bottom portion) are arranged. As a result, a gap corresponding to the amount of protrusion of the convex portion 4d is secured between the plate 4 and the wall portion 1d (bottom portion).

Next, an example of the operation of the plate 4 will be described with reference to FIGS. 4A to 4C.
4A and 4B are diagrams showing an example of the operation of the plate 4. As shown in FIG. 4A, when the liquid level L1 is relatively high, the plate 4 is arranged so as to float on the high liquid level L1. Further, as shown in FIG. 4B, when the liquid level L1 is relatively low, the plate 4 is arranged so as to float on the low liquid level L1. That is, the plate 4 is guided by the guide portion 3 so as to be movable in the height direction (Y direction) according to the position of the liquid level L1.

FIG. 4C is a diagram showing an example of the operation of the plate 4. For example, as shown in FIG. 4C, when the vehicle travels on a ramp, even when the tank 1 is tilted with respect to the horizontal axis, the plate 4 has a recess 4b that fits into the guide portion 3, so that the tank 1 It is regulated not to tilt with respect to the wall, and maintains a posture parallel to the wall 1d (bottom). In other words, the plate 4 prevents the liquid level L1 from tilting with respect to the tank 1 by suppressing the liquid level L1 of the fuel L. As a result, the liquid level L1 does not deviate from the position of the suction port 2c of the pipe 2a. As a result, the fuel L can be sucked up from the suction port 2c.

The fuel L passes between the tank 1 and the plate 4, between the liquid suction portion 2 and the plate 4, and between the guide portion 3 and the plate 4, and the fuel L flows from the wall portion 1d (bottom) side to the wall portion. It can move to the 1c (ceiling) side. Therefore, the plate 4 cannot completely suppress the liquid level L1. However, here, it is assumed that the movement of the fuel L from the wall portion 1d side to the wall portion 1c is not considered. The reason is that the amount of movement of the fuel L from the wall portion 1d side to the wall portion 1c is small, and most of the fuel L stays on the wall portion 1d side, so that the plate 4 covers most of the liquid level L1. This is because it is possible to suppress it. It is preferable that the tank 1 and the plate 4, the liquid suction portion 2 and the plate 4, and the guide portion 3 and the plate 4 are sealed.

The liquid storage device 10 according to the above embodiment is mounted on a vehicle and covers the tank 1 for storing the fuel L and the liquid level L1 of the fuel L in the tank 1 from the wall portion 1c (ceiling portion) side of the tank 1. A plate 4 arranged in such a manner is provided.

With the above configuration, the plate 4 covers the liquid level L1 so that the plate 4 suppresses the liquid level L1, so that the liquid level L1 can be prevented from tilting with respect to the tank 1.

Further, in the above embodiment, the plate 4 is arranged so as to float on the liquid level L1 of the fuel L. This makes it possible to suppress the fluctuation of the liquid level L1. As a result, the occurrence of sloshing can be prevented.

Further, in the above embodiment, the plate 4 is regulated so as not to tilt with respect to the tank 1, and is guided to move between the wall portion 1c (ceiling portion) and the wall portion 1d (bottom portion). A guide unit 3 is provided. As a result, the plate 4 does not tilt with respect to the tank 1, so that the liquid level L1 can be reliably suppressed. Further, since the plate 4 can be reliably moved between the wall portion 1c (ceiling portion) and the wall portion 1d (bottom portion) according to the position of the liquid level L1 by the guide portion 3, the plate 4 can be reliably moved from this point as well. , It is possible to surely suppress the liquid level L1.

In the above embodiment, the specific gravity of the plate 4 is made smaller than the specific density of the fuel L so that the plate 4 floats on the liquid level L1, but the present disclosure is not limited to this, and a float or a floating bag is attached to the plate 4. You may.

Further, in the above embodiment, the plate 4 is guided by the guide portion 3 so as to be movable in the height direction (Y direction) according to the position of the liquid level L1. Therefore, a sensor capable of detecting the position of the plate 4 in the height direction and measuring the remaining amount of fuel L in the tank 1 based on the detection result may be provided.

Further, in the above embodiment, the liquid stored in the tank 1 is the fuel L, but the present disclosure is not limited to this, and the tank is used to purify the nitrogen oxides (NOx) in the exhaust gas of the diesel engine. It may be urea water stored in the exhaust gas and injected into the exhaust gas.

Further, in the above embodiment, the recess 4b is arranged at the corner 4a of the plate 4 and the recess 4b is fitted to the guide portion 3, but the present disclosure is not limited to this, and for example, the corner 4a of the plate 4 is fitted. A circular through hole (not shown) may be provided, and the through hole may be fitted to the guide portion 3. However, the recess 4b has an advantage that the plate 4 can be easily fitted (assembled) to the guide portion 3 as compared with the through hole.

Further, in the above embodiment, the guide portion 3 is a rod-shaped body having a predetermined outer diameter and extends in the height direction (Y direction), but the present disclosure is not limited to this. For example, a flange (not shown) extending in the height direction (Y direction) is provided on the peripheral edge of the plate 4, and the flange is aligned with the wall portions 1a, 1b, 1e, 1f (inner peripheral wall) of the tank 1. May be good. The wall portion 1a or the like makes it possible to prevent the plate 4 from tilting with respect to the tank 1. This makes it possible to prevent the liquid level L1 from tilting with respect to the tank 1. In this case, the wall portions 1a, 1b, 1e, 1f of the tank 1 have a function as a guide portion 3.

In addition, the above embodiments are merely examples of embodiment of the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner by these. .. That is, the present disclosure can be implemented in various forms without departing from its gist or its main features.

The present disclosure is suitably used for vehicles equipped with a liquid storage device that is required to prevent the liquid level from tilting with respect to the tank.

1 Tank 1a, 1b, 1c, 1d, 1e, 1f Wall part 2 Liquid suction part 2a Pipe 2b Height direction end part 2c Suction port 3 Guide part 3a Upper end 3b Lower end 4 Plate 4a Corner 4b Recess 4c Insertion hole 4d Convex 5 Baffle plate 10 Liquid storage device

Claims (5)

A tank that is mounted on the vehicle and stores liquid,
A plate arranged so as to cover the liquid level of the liquid in the tank from the ceiling side of the tank,
A guide portion that regulates the plate so as not to tilt with respect to the tank and guides the plate to move between the ceiling portion and the bottom portion of the tank.
To prepare
Liquid storage device. The plate is arranged so as to float on the liquid surface of the liquid.
The liquid storage device according to claim 1. A liquid suction portion for sucking the liquid in the tank from the bottom side to the ceiling side is further provided.
The plate has an insertion hole through which the liquid suction portion is inserted.
The liquid storage device according to claim 1 or 2. The liquid is fuel or urea water,
The liquid storage device according to any one of claims 1 to 3. A vehicle comprising the liquid storage device according to any one of claims 1 to 4.

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