JP2014152786A - Reservoir tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an existing reservoir tank having a tank main body and a nozzle part molded integrally in which some foreign substances accumulated in the tank main body can be prevented from flowing out of the tank not by newly machining the tank main body, but by adding a simple member.SOLUTION: This invention relates to a reservoir tank 1 that is constituted in such a way that a tank main body 10 and a nozzle part 30 protruded from the tank main body 10 downward are integrally molded with resin, a hose 50 is outwardly fitted to the nozzle part 30, fitted with a hose band 51, an inlet side opening plane of the nozzle part 30 is formed in flush with an inner bottom surface 10a of the tank main body 10, an obstacle flowing-out prevention pipe 40 is fitted to the nozzle part 30, an upper end surface of the obstacle flowing-out prevention pipe 40 is protruded upwardly by a first prescribed distance in respect to the inner bottom surface 10a of the tank main body 10, its lower end surface is protruded downward by a second prescribed distance in respect to an outlet side opening surface of the nozzle part 30 and fitted to the nozzle part 30, and the obstacle flowing-out prevention pipe 40 is fixed with the hose band 51 through the hose 50 and the nozzle part 30.

Description

  The present invention relates to a reservoir tank used for storing a fluid such as hydraulic oil.

  Conventionally, as shown in FIG. 6, for example, a reservoir tank 100 used when supplying hydraulic oil to a booster (not shown) includes a tank main body 110 for storing hydraulic oil, and an internal tank body 110. And a nozzle part 130 for replenishing the booster with the hydraulic oil in the tank main body 110 via the hose 150.

  In such a reservoir tank 100, for example, when the hydraulic oil is supplied to the reservoir tank 100 or when air flows in, foreign matter mixed into the tank body 110 from the oil supply port of the oil supply unit 120 or impurities of the hydraulic oil (contamination) ) Is deposited on the inner bottom surface 110 a of the tank body 110. In this case, for example, when the brake is operated, the accumulated foreign matter or the like flows out from the inlet side end portion 130a of the nozzle portion 130 to the nozzle portion 130, and the discharged foreign matter or the like enters the booster. For this reason, problems with the booster are often caused by foreign matters mixed from the nozzle portion 130.

  Therefore, in another conventional reservoir tank, a strainer is provided in the suction pipe for supplying the hydraulic oil to the hydraulic pump provided on the downstream side of the reservoir tank, so that foreign matters are present in the hydraulic oil supplied to the hydraulic pump. It is set as the structure which is not mixed (for example, refer patent document 1).

  However, in the reservoir tank of Patent Document 1, it is necessary to attach a strainer to the suction pipe when the reservoir tank is molded. Therefore, in the already formed reservoir tank, there is a problem that the tank body must be newly processed in order to attach the strainer.

JP-A-7-83202

  Accordingly, the present invention provides a foreign tank deposited on the tank body by adding a member having a simple configuration to the existing reservoir tank in which the tank body and the nozzle portion are integrally molded without newly processing the tank body. An object of the present invention is to provide a reservoir tank capable of preventing the outflow of the water to the outside.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in the reservoir tank according to the first aspect of the present invention, a tank body in which an oil supply port through which air can enter and exit is formed, and a nozzle portion protruding downward from the bottom surface of the tank body is integrally molded with resin, A reservoir tank in which a flexible tube is externally fitted and fixed with a fastener, and an inlet side opening surface of the nozzle portion is formed flush with an inner bottom surface of the tank body, and the nozzle portion The foreign matter outflow prevention tube is fitted, and the upper end surface of the foreign matter outflow prevention tube protrudes upward from the inner bottom surface of the tank body by a first predetermined distance, and the lower end surface of the nozzle portion The foreign matter flows out through the flexible tube and the nozzle portion by being fitted into the nozzle portion while being projected downward by a second predetermined distance from the outlet opening surface. The prevention tube is fixed.

  According to a second invention, in the configuration of the first invention, the foreign matter outflow prevention pipe is fitted with a small diameter portion fitted to the upper portion of the nozzle portion with a gap fit and a large fit fitted with a narrow fit to the lower portion of the nozzle portion. The large diameter portion is provided with a slit whose outer diameter can be reduced.

  According to a third invention, in the configuration of the first or second invention, a filter is provided in an upper opening of the foreign matter outflow prevention pipe.

  According to the first aspect of the present invention, the foreign substance outflow prevention pipe is attached to the nozzle portion without newly processing the tank body of the existing reservoir tank, and the first predetermined distance from the inner bottom surface of the tank body. By making it protrude, the foreign material deposited on the tank main body can be prevented from flowing out. In addition, since the lower end surface of the foreign matter outflow prevention tube protrudes downward from the nozzle portion, the foreign matter outflow prevention tube can be easily detached from the nozzle portion during cleaning of the reservoir tank.

  According to the second invention, even if the accuracy of the inner peripheral portion of the nozzle portion is poor due to integral resin molding, the foreign substance outflow prevention tube can be reliably fitted into the nozzle portion from the small diameter portion. And the large diameter part which has a slit can be reliably inserted and fixed to a nozzle part.

It is the schematic which shows the whole structure of the reservoir tank which concerns on the Example of this invention. It is sectional drawing of the nozzle part vicinity of the reservoir tank which concerns on the Example of this invention. It is sectional drawing of the nozzle part vicinity at the time of providing the foreign material outflow prevention pipe in the nozzle part in the reservoir tank which concerns on the Example of this invention. It is a perspective view of the foreign substance outflow prevention pipe in the reservoir tank concerning the example of the present invention. It is a perspective view which shows another Example of the foreign material outflow prevention pipe | tube in the reservoir tank which concerns on the Example of this invention. It is the schematic which shows the whole structure of the conventional reservoir tank.

  First, the configuration of the reservoir tank 1 according to an embodiment of the present invention will be described with reference to the drawings.

  The reservoir tank 1 is a tank for storing hydraulic oil to be supplied to a booster (not shown) in a cargo handling vehicle or the like. As shown in FIG. 1, the reservoir tank 1 includes a tank main body 10 for storing hydraulic oil, an oil supply port 10b that is integrally provided on the upper surface of the tank main body 10 and supplies hydraulic oil, and the oil supply. An oil supply cap 20 that is attached to the opening 10b so as to be freely opened and closed and allows air to enter and exit the tank body 10 through a filter, and two for supplying and discharging hydraulic oil in the tank body 10 to and from the booster. Nozzle portion 30. In the reservoir tank 1, hydraulic oil is supplied to the tank body 10 from the oil supply port 10 b, and the supplied hydraulic oil is supplied to the booster via the nozzle unit 30 and a hose (flexible pipe) 50 described later. The Further, the return hydraulic oil from the booster is returned to the tank body 10 via the nozzle portion 30 and the hose 50.

  As shown in FIG. 1, the tank body 10 is a body portion of the reservoir tank 1 and is made of resin. The oil filler 10 b is provided in the upper part of the tank body 10. The oil supply cap 20 is provided with a cap main body 22 that is detachably attached to the oil supply port 10b that is an operation oil supply port. The oil supply cap 20 is provided in the cap main body 22 to prevent the hydraulic oil from flowing out. It is comprised with the breather 23 with a filter which accept | permits inflow of air in the main body 10. FIG.

  As shown in FIGS. 1 and 2, the two nozzle portions 30 are formed in a resin cylinder integrally formed with the tank body 10. The nozzle portion 30 is formed so as to protrude downward from the inner bottom surface 10 a of the tank body 10. In one nozzle portion 30 (for example, the right nozzle portion 30 in FIG. 1), the hydraulic oil stored in the tank body 10 is supplied to the booster and the other nozzle portion 30 (for example, the left side in FIG. 1). In the nozzle portion 30), the return hydraulic oil from the booster is introduced. In addition, although the nozzle part 30 performs inflow and outflow of hydraulic fluid, you may perform only the outflow of hydraulic fluid.

  Further, as shown in FIG. 2, the nozzle portion 30 is formed so that the inlet side opening surface 30 a thereof is flush with the inner bottom surface 10 a of the tank body 10.

  Further, as shown in FIGS. 1 and 3, a foreign matter outflow prevention pipe 40 is provided in the nozzle portion 30 in order to prevent foreign matter or contamination accumulated on the inner bottom surface 10 a of the tank body 10 from flowing out to the nozzle portion 30. Is detachably attached. And the upper end opening surface 40a of the foreign material outflow prevention pipe 40 is made higher than the inlet side opening surface 30a of the nozzle part 30 (the inner bottom surface 10a of the tank body 10) to prevent outflow of foreign material or contamination into the foreign material outflow prevention pipe 40. To do.

  As shown in FIGS. 3 and 4, the foreign matter outflow prevention tube 40 is a cylindrical tube, and a lower portion is formed on the large diameter portion 40A and a remaining portion (intermediate portion and upper portion) is formed on the small diameter portion 40B via the step portion 40C. ing.

  The large diameter portion 40A has an outer diameter that is fitted to the nozzle portion 30 by “tightening fit”. That is, the large diameter portion 40 </ b> A is formed so that its outer diameter is larger than the inner diameter of the nozzle portion 30. The large-diameter portion 40A is formed such that its outer diameter can be reduced by, for example, a pair of slits 40D formed at symmetrical positions on the axis.

  The small diameter portion 40B is an outer diameter that is fitted to the nozzle portion 30 by “gap fitting”. That is, the small diameter portion 40 </ b> B is formed so that its outer diameter is smaller than the inner diameter of the nozzle portion 30.

  The reason why the large-diameter portion 40A and the small-diameter portion 40B are formed in this way is that the nozzle portion 30 is resin-molded integrally with the tank body 10, and therefore, the inner diameter of the nozzle portion 30 varies greatly. By forming the large-diameter portion 40A and the small-diameter portion 40B as described above, the foreign matter outflow prevention tube 40 can be surely penetrated into the nozzle portion 30 having large variations. Actually, the foreign matter outflow prevention tube 40 is fixed in the nozzle portion 30 because a hose band (fastening tool) for fixing a hose (flexible tube) 50 fitted on the nozzle portion 30 is used. The foreign matter outflow prevention pipe 40 is fixed by being tightened via the hose 50 and the nozzle portion 30.

  Further, as shown in FIG. 3, the foreign matter outflow prevention pipe 40 has an upper end surface (an end portion on the upper end opening surface 40 a side) upward with respect to the inner bottom surface 10 a of the tank main body 10 (a central direction of the tank main body 10). It protrudes by a predetermined distance A (first predetermined distance) and is inserted into the nozzle portion 30. Here, the predetermined distance A means that foreign matter or contamination accumulated on the inner bottom surface 10a of the tank body 10 before maintenance does not enter the foreign matter outflow prevention tube 40 beyond the upper end opening surface 40a of the foreign matter outflow prevention tube 40. For example, the distance is set to approximately twice the height of foreign matter or contamination. Thereby, the inlet side opening surface 30a of the nozzle portion 30 is substantially higher than the inner bottom surface 10a of the tank body 10 by a predetermined distance A. Therefore, foreign matter or contamination accumulated on the inner bottom surface 10 a of the tank body 10 is prevented from flowing into the nozzle portion 30 by the foreign matter outflow prevention tube 40. Therefore, for example, when the brake is operated, the accumulated foreign matter does not flow in from the nozzle portion 30 and flow out downstream.

  Further, as shown in FIG. 3, the foreign substance outflow prevention tube 40 has a lower end surface (lower end opening surface 40 b) that is lower than the outlet side opening surface 30 b of the nozzle unit 30 (the protruding direction of the nozzle unit 30). It protrudes by a predetermined distance B (second predetermined distance) and is inserted into the nozzle portion 30. Here, the predetermined distance B is a distance that allows the large-diameter portion 40A to be grasped with a finger or a tool such as pliers and pulled out from the nozzle portion 30 in order to pull out the foreign matter outflow prevention tube 40 from the nozzle portion 30 during maintenance. It is. The lower end surface (lower end opening surface 40b) of the foreign matter outflow prevention tube 40 protrudes downward by a predetermined distance B from the outlet side opening surface 30b of the nozzle portion 30, so that the foreign matter is maintained during maintenance (cleaning) of the reservoir tank 1. The outflow prevention pipe 40 can be pulled out from the nozzle portion 30.

  Furthermore, as shown in FIG. 1, a hose 50 is connected to the nozzle portion 30. The hose 50 is inserted from the outlet side opening surface 30b side of the nozzle portion 30 and is mounted so as to cover the nozzle portion 30 and the large diameter portion 40A of the foreign matter outflow prevention tube 40. Further, a ring-shaped hose band 51 as a fastening tool is attached to the upper end portion of the hose 50.

  In addition, as shown in FIG. 5, it can also be set as the structure which provides the filter 60 in the upper side opening part (upper end opening surface 40a and its vicinity) of the foreign material outflow prevention pipe | tube 40. As shown in FIG. The filter 60 is a circular member substantially the same as the diameter of the upper end opening surface 40a of the foreign matter outflow prevention tube 40 (the inner diameter of the small diameter portion 40B of the foreign matter outflow prevention tube 40). By providing the filter 60 in the upper opening of the foreign matter outflow prevention tube 40, foreign matters can be reliably prevented from flowing into the nozzle portion 30 (foreign matter outflow prevention tube 40).

  As described above, according to the reservoir tank 1, by adding the foreign matter outflow prevention pipe 40 having a simple configuration to the nozzle portion 30, the tank body 10 can be processed without newly processing the tank body 10 of the existing reservoir tank 1. It is possible to prevent foreign matter accumulated on the inner bottom surface of the liquid from flowing out.

  In the reservoir tank 1 of the present invention, the two nozzle portions 30 are provided, but the number of the nozzle portions 30 is not limited to two, but three or more or one nozzle portion 30. The reservoir tank may be provided.

  Further, the present invention is not limited to a reservoir tank for storing hydraulic oil. For example, a reservoir tank in which foreign matter accumulates on the inner bottom surface of the tank body (for example, a cooling water for a radiator). It may be a reservoir tank (for storage).

1 Reservoir Tank 10 Tank Body 10a Inside Bottom (Tank Body)
30 Nozzle part 30a Inlet side opening surface (nozzle part)
30b Outlet side opening surface (nozzle part)
40 Foreign matter outflow prevention tube 40A Large diameter portion 40B Small diameter portion 40D Slit 50 Hose (flexible tube)
51 Hose band (clamp)
60 Filter A First predetermined distance B Second predetermined distance

Claims (3)

The tank body with an oil supply port through which air can enter and exit and the nozzle part protruding downward from the bottom surface of the tank body are integrally molded with resin, and a flexible tube is fitted over the nozzle part and tightened. A reservoir tank fixed with an accessory,
The inlet side opening surface of the nozzle part is formed flush with the inner bottom surface of the tank body,
Fitting a foreign matter outflow prevention pipe to the nozzle part,
The foreign matter outflow prevention pipe has an upper end surface protruding upward by a first predetermined distance with respect to the inner bottom surface of the tank body, and a lower end surface thereof downward with respect to the outlet side opening surface of the nozzle portion. In a state where it protrudes by a second predetermined distance, it is fitted into the nozzle part,
The reservoir tank, wherein the foreign matter outflow prevention pipe is fixed by the fastener through the flexible pipe and the nozzle portion. The foreign matter outflow prevention pipe has a small diameter portion fitted into the upper portion of the nozzle portion with a gap fit, and a large diameter portion fitted into the lower portion of the nozzle portion with a tight fit,
The reservoir tank according to claim 1, wherein the large-diameter portion is provided with a slit whose outer diameter can be reduced. The reservoir tank according to claim 1 or 2, wherein a filter is provided in an upper opening of the foreign matter outflow prevention pipe.

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