JP5364361B2 - Water sub tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank preventing fall-off of a float in an independent state in water sub tanks. <P>SOLUTION: The sub tank includes a lower side tank body where a plurality of reinforcement ribs are formed in the vertical direction within it, and an upper side tank body, attached to the upper opening of the lower side tank body, where a plurality of reinforcement ribs are formed in conformity with the above reinforcement ribs in the vertical direction. A water level sensor where a float moves vertically along a support according to the cooling water level is mounted in the lower side tank body, and a fall-off preventing rib preventing fall-off of the float from the upper tip of the support is set above the water level sensor within the upper side tank body. In the tank, the fall-off preventing rib is spanned between the reinforcement ribs of the upper side tank body by aligning it with the axis of the support. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a water sub tank equipped with a water level sensor for detecting a cooling water level.

  As disclosed in Patent Document 1, conventionally, the cooling system of the vehicle internal combustion engine absorbs the volume expansion of the cooling water in the radiator, eliminates the waste of the cooling water due to the outflow from the overflow pipe, and cools for a long time. A water sub tank (hereinafter referred to as “tank”) is installed so that it is not necessary to replenish water.

  In order to secure the pressure resistance of the tank and improve the durability by expanding the tank volume accompanying the tightening of exhaust gas regulations, the upper tank body 3 and the lower tank constituting the tank 1 as shown in FIGS. A plurality of reinforcing ribs 7 and 9 are provided in the side tank body 5 so as to coincide with the vertical direction like a partition plate. In addition, notches (not shown) are provided below the reinforcing ribs 9 formed in the lower tank body 5, and the cooling water level in the tank 1 partitioned by the reinforcing ribs 9 is uniform due to these notches. To be kept.

  As is well known, the tank 1 is formed by attaching the upper tank body 3 to the upper opening of the lower tank body 5.

  Also, in order to prevent damage to the engine due to air suction due to a decrease in the cooling water level in the tank 1, when the water level in the tank 1 falls below a certain level, this is detected and the engine protection function is activated. A water level sensor 11 is mounted in the tank 1.

The water level sensor 11 includes a column (sensor guide) 13 formed on the lower tank body 5 and a water level sensor float (hereinafter referred to as “float”) that is loosely inserted into the column 13 and moves up and down according to the cooling water level. And a sensor main body (not shown) incorporated in the column 13, and a magnet (not shown) is incorporated in the float 15. When the water level in the tank 1 falls below a certain water level, the sensor body is turned on by the magnet, and a detection signal is sent to the engine protection function.
Japanese Utility Model Publication No. 60-1385

  However, the upper portion of the support column 13 is a free end, and the float 15 is in a state of free movement in a single tank state. For example, if the tank 1 is turned upside down before assembly to the vehicle, There was a possibility that the float 15 would fall off from the column 13.

  In addition, even if the water level in the tank 1 is sufficient, if the water level in the tank 1 is biased to one side due to sudden braking or rolling of the vehicle, for example, a malfunction occurs in which the float 15 is lowered and the sensor body is turned on. There was a fear.

  The present invention has been devised in view of such circumstances, and a first object thereof is to provide a tank that prevents the float from falling off in a single product state.

  A second object of the present invention is to provide a tank that prevents malfunction of the water level sensor due to sudden braking or rolling of the vehicle.

To achieve such object, the invention according to claim 1, and a lower tank body in which a plurality of reinforcing ribs are formed vertically therein, trims the upper opening of the lower tank main body, said reinforcing rib The upper tank body has a plurality of reinforcing ribs formed in the vertical direction so as to coincide with each other, and a water level sensor in which the water level sensor float moves up and down along the column in accordance with the cooling water level is mounted in the lower tank body. In the water sub-tank, a reinforcing rib is installed between the reinforcing ribs of the upper tank body so as to prevent the water level sensor float from falling off from the upper end of the supporting column in accordance with the axial center of the supporting column. .

According to a second aspect of the present invention, in the tank according to the first aspect, the reinforcing rib formed on the lower tank body is provided with a swirling layer surrounding the water level sensor, and the swirling layer is formed. A through hole for reducing the movement of the cooling water is provided in the lower portion of the reinforcing rib.

According to the first aspect of the present invention, since the reinforcing rib for preventing the water level sensor float from dropping is installed between the reinforcing ribs of the upper tank main body in accordance with the axis of the support column, the water level sensor can be used regardless of the orientation of the tank. can float is not able to fall off the post, to maintain the function of the water level sensor.

Also, since the erection of the reinforcement ribs for preventing falling between them by utilizing the reinforcing ribs existing, by the reinforcing ribs for the drop-off prevention, it has the advantage that the strength of existing reinforcing ribs is improved.

And according to the invention which concerns on Claim 2 , even when the cooling water in a tank is biased by sudden braking at the time of driving | running | working, since the water level in a turning layer is stabilized, malfunctioning of a water level sensor can be prevented. It becomes possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 4 show an embodiment of the invention according to claims 1 and 2 , wherein in FIG. 1 to 3, reference numeral 21 denotes a lower side in which a plurality of reinforcing ribs 23 are formed in the vertical direction. A tank body 25 is an upper tank body in which a plurality of reinforcing ribs 27 are formed in the vertical direction so as to coincide with the reinforcing ribs 23, and similar to the tank 1 of FIG. A tank main body 25 is attached to form a tank 29 according to the present embodiment.

  7, notches (not shown) are provided below the reinforcing ribs 23, and the cooling water level in the tank 29 partitioned by the reinforcing ribs 23 is uniform due to these notches. To be kept.

Moreover, the substantially center of the bottom portion 31 of the lower tank main body 21, a support column 13 provided upright on the bottom 31, a float 15 which moves up and down depending on the cooling water level of the loosely interpolated in tank 29 to the standoff 13 A water level sensor 11 comprising a sensor main body (not shown) incorporated in the column 13 is mounted, and the upper part of the column 13 is a free end.

And Thus, the embodiment as shown in FIG. 2, in addition to such conventional configuration similar to the above, first, between the reinforcement ribs 2 7 two opposed substantially center of the upper tank main body 21, the float 15 The first feature is that the reinforcing rib 33 for preventing the dropout of the upper tank body 21 is further integrally installed in the longitudinal direction of the upper tank body 21 .
That is, when forming the tank 29 is attached to the upper tank main body 25 to the upper opening of the lower tank main body 21, reinforcing ribs 33 for drop-off prevention as shown in FIG. 4 is disposed on the axis of the column 15, and fall off reinforcing ribs 33 for preventing close from above to the extent that a slight gap between the upper tip of the column 15, are I Figure the captive float 15 from column 15.

  Further, as a second feature of the present embodiment, when the plurality of reinforcing ribs 23 are erected on the lower tank body 21 as shown in FIG. 3, the reinforcing ribs 23 are surrounded so as to surround the water level sensor 11 in a narrow area. 1 to form the swivel layer 35 and to reduce the movement of the cooling water in the lower part of the reinforcing rib 23 on one side of the four reinforcing ribs 23 forming the swivel layer 35 as shown in FIG. A through hole 37 is provided.

In the present embodiment, the upper tank body 25 is attached to the upper opening of the lower tank body 21 to form the tank 29, and the reinforcing ribs 23 and 27 provided inside provide the pressure resistance of the tank 29. you ensure.
When the tank 29 is formed, the drop-off prevention reinforcing rib 33 provided on the upper tank body 25 as shown in FIG. 4 is arranged on the axis of the column 15, and the drop-off prevention reinforcing rib 33 is provided on the column 15. For example, even if the tank 29 is turned upside down before being assembled to the vehicle, the dropout prevention reinforcing ribs 33 prevent the float 15 from falling off. .

  Further, after the tank 29 is assembled to the vehicle, even if the cooling water in the tank 29 is biased to one side due to, for example, sudden braking or rolling of the vehicle, the movement of the cooling water in the turning layer 35 is reduced by the through hole 37. Therefore, the cooling water level in the swirl layer 35 does not decrease rapidly, and the float 15 does not move rapidly.

  Therefore, according to this embodiment, it is possible to maintain the function of the water level sensor 11 without the float 15 falling off the column 13 regardless of the orientation of the tank 29.

Further, since the reinforcing ribs 33 for preventing the dropout are installed between the existing reinforcing ribs 27, the strength of the existing reinforcing ribs 27 is improved by the reinforcing ribs 33 for preventing the fallingout .

Furthermore, by providing the swirling layer 35 as already described, the water level of the swirling layer 35 even if the cooling water is biased it is than constructed as stable, to prevent malfunction of the water level sensor 11 during running It became possible.

It is a side view of the water subtank concerning one embodiment of Claim 1 thru / or Claim 3. It is a bottom view of an upper tank body. It is a top view of a lower tank main body. It is a top view of the lower tank main body which shows the position of the reinforcement rib for drop-off prevention with respect to a water level sensor. It is a side view of the conventional water subtank. It is a bottom view of the conventional upper tank main body. It is a top view of the conventional lower tank main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Water level sensor; 13 ... Support | pillar; 15 ... Float; 21 ... Lower tank main body; 23, 27 ... Reinforcement rib; 25 ... Upper tank main body; 33 ... Reinforcing ribs for preventing dropping; 35 ... Swivel layer; 37 ... Through hole

Claims (2)

A lower tank body in which a plurality of reinforcing ribs are formed in the vertical direction;
It is attached to the upper opening of the lower tank body, and consists of an upper tank body in which a plurality of reinforcing ribs are formed in the vertical direction so as to coincide with the reinforcing ribs,
In the water sub-tank equipped with a water level sensor in which the water level sensor float moves up and down along the support in the lower tank body according to the cooling water level,
A water sub-tank characterized in that a reinforcing rib is installed between the reinforcing ribs of the upper tank body so as to prevent the water level sensor float from dropping off from the upper end of the supporting column in accordance with the axis of the supporting column . A reinforcing rib formed on the lower tank body is provided with a swirling layer surrounding the water level sensor, and a through hole is provided under the reinforcing rib forming the swirling layer to reduce the movement of cooling water. The water subtank according to claim 1.

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