JPH0644675U - Tank mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] In a tank mounting structure in which a metal bush and a mounting bracket are integrally connected to a resin tank body, the sealability between the tank body and the bush and mounting bracket is improved. Prevent leakage of oil from the tank body. [Constitution] Bush assembly hole 1 of resin tank body 10
2, one end side of the metal bush 20 to which the O-ring 22 is attached is inserted to seal between the tank body 10 and the bush 20 by the O-ring 22, and the metal mounting bracket 30 is attached. The tank body inserted into the bush 20 through the bush insertion hole 32, the tank body 10 and the mounting bracket 30 are overlapped with each other with the holding portion 26 of the bush 20 interposed therebetween, and the tank body inserted into the through hole 34 of the mounting bracket 30. By ultrasonically crimping the boss 16 of 10, the tank body 10, the bush 20, and the mounting bracket 30 are integrally assembled.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a mounting structure for a tank, and more particularly to a mounting structure in which a metal bush and a mounting bracket are integrally joined in a liquid-tight state to a resin tank body. .

[0002]

[Background technology]

 Among various tanks, for example, a tank made of resin is used as a reservoir tank provided in a power steering mechanism of an automobile, and an example of such a reservoir tank is shown in FIG. ing. Here, 2 is a tank body for storing oil, which is made of resin. Then, a pipe-shaped bush 4 made of metal such as iron is attached so as to penetrate the wall portion of the tank body 2, and oil is allowed to flow from the tank body 2 to the pump through the bush 4. . Further, a metal mounting bracket 6 is integrally connected to the tank body 2, and the tank is fixed by bolting the mounting bracket 6 to a peripheral device such as a pump or a structural material. The main body 2 can be fixed at a desired position.

In the past, in order to integrally join the tank body 2 made of resin, the bush 4 made of metal, and the mounting bracket 6, first, the bush 4 and the mounting bracket 6 are welded to each other. A typical insert member is used, and then the tank body 2 is injection-molded (insert-molded) in a state where it is placed in a mold.

However, the conventional tank mounting structure based on such a molding method has many problems regarding the sealability. That is, if the metal insert member (bush and mounting bracket) is cold during the insert molding described above, the resin will not melt well and the resin will not reach the details at the boundary between the resin and the metal, resulting in lack of wall thickness. Therefore, there is a problem in that the sealing performance between the tank body 2, the bush 4 and the mounting bracket 6 is deteriorated to cause oil leakage. On the other hand, if the insert member is heated to prevent this, there arises a problem that the cost becomes high. Further, since the resin and the metal have different thermal contraction rates, a gap is likely to be formed between the tank body 2 and the bush 4 or the mounting bracket 6 after the insert molding, and a crack or the like may occur. Further, if dust, oil, or the like adheres to the bush 4 or the mounting bracket 6 during insert molding, there is a problem that the sealing performance after molding deteriorates.

[0005]

[Solution]

 The present invention has been made in view of such circumstances, and the problem to be solved is to mount a tank in which a resin tank body, a metal bush and a mounting bracket are integrally connected. In the structure, it is to prevent the leakage of oil etc. by improving the sealing performance between the tank body and the bush and mounting bracket.

[0006]

[Solution]

 In order to solve such a problem, according to the present invention, (a) a plurality of bosses are formed so as to project outward around a bushing mounting hole provided through the wall portion. A resin-made tank body and (b) a ring-shaped seal member is attached to the outer peripheral surface on one end side, and a sandwiching portion protruding in the radial direction is provided on the outer peripheral surface closer to the center than the mounting position of the seal member. The formed metal bush having a pipe shape, and (c) a bush insertion hole and a plurality of through holes provided at positions corresponding to the bush assembly hole and the plurality of bosses of the tank body, respectively. And a metal mounting bracket having the same, the one end side of the bush to which the seal member is attached is inserted into the bush assembly hole of the tank body, and the tank body and the bush are connected by the seal member. The space is a seal At the same time, the mounting bracket is inserted into the bush through the bush insertion hole, and the tank body and the mounting bracket are overlapped with each other with the holding portion of the bush interposed therebetween and inserted into the through hole of the mounting bracket. A tank mounting structure is characterized in that the tank body, the bush, and the mounting bracket are integrally assembled by ultrasonically caulking the boss of the tank body that has been assembled. Is.

[0007]

[Action / effect]

 In short, in the present invention, instead of the conventional insert molding, a simple assembly method using ultrasonic caulking is adopted, and the resin tank main body and the metal mounting bracket hold the bush between them. These members are joined by being integrally assembled by ultrasonic caulking with the parts sandwiched therebetween. Therefore, problems such as lack of resin, gaps, and cracks at the boundary between resin and metal due to insert molding do not occur, and the seal member placed between the tank body and the bush does not occur. Since a good sealing property is obtained, the sealing property of the tank mounting structure can be improved, and the leakage of oil or the like from the tank body can be effectively prevented.

Further, in the conventional tank mounting structure, since insert molding is adopted, if the shape of the mounting bracket is changed by changing the mounting position of the tank, it is necessary to replace the mold, resulting in cost reduction. However, the tank mounting structure of the present invention adopts an assembly method, so that the shape of the mounting bracket is changed even if the tank mounting position is changed. However, there is also an advantage that cost reduction and productivity improvement can be advantageously achieved.

[0009]

【Example】

 Hereinafter, in order to clarify the present invention more specifically, an example in which the tank mounting structure according to the present invention is applied to a reservoir tank in a power steering mechanism of an automobile will be described in detail with reference to the drawings. I will.

First, FIG. 1 shows a cross section of a mounting structure portion of a reservoir tank, and FIG. 2 shows the configuration of each component used therein. Among these parts, 10 is a tank main body for storing oil and is made of resin. A bushing mounting hole 12 having a size and shape substantially the same as the outer diameter of the bush 20 described later is provided through the wall portion. A large-diameter portion 14 is formed in a stepped shape at the opening of the bush mounting hole 12 on the outer side of the tank. Further, on the outer surface of the tank body 10, a plurality of ultrasonic caulking bosses 16 are formed so as to project outward around the bushing assembling hole 12, and the plurality of bosses 16 are formed. A plurality of protrusions 18 for welding a cover plate 40, which will be described later, are formed so as to be positioned between them so as to project outward.

Reference numeral 20 is a bush having a pipe shape made of metal such as iron, and has a groove 24 into which an O-ring 22 as a seal member is fitted on the outer peripheral surface on one end side (lower end side in FIG. 2). Are formed. Further, on the outer peripheral surface closer to the center than the concave groove 24, a sandwiching portion 26 is formed, which projects in a flange shape in the radial direction. Further, a concave groove is formed on the outer peripheral surface on the other end side (upper end side in FIG. 2) of the bush 20 and serves as a connecting portion 28 such as a hose.

The bush 20 is inserted into the bush assembly hole 12 of the tank body 10 from one end side to which the O-ring 22 is attached, so that the holding portion 26 has a large diameter portion of the bush attachment hole 12. It is adapted to be assembled to the tank body 10 at a position where it is brought into contact with the tank body 14. Further, an O-ring 22 can satisfactorily seal between the tank body 10 and the bush 20. Therefore, the leakage of the oil stored in the tank body 10 can be effectively prevented, and the oil can be guided to the pump or the like through the bush 20 and the hose.

Further, reference numeral 30 denotes a metal mounting bracket, which is provided at a position corresponding to the bush assembly hole 12 and the plurality of bosses 16 provided in the tank main body 10, respectively. A bush insertion hole 32 and a plurality of through holes 34 having substantially the same size and shape are formed. A plurality of fitting holes 36 are formed in the mounting bracket 30 at positions corresponding to the plurality of protrusions 18 of the tank body 10. The mounting bracket 30 is inserted into the bush 20 through the bush insertion hole 32, so that the mounting bracket 30 is overlapped with the tank body 10 with the holding portion 26 of the bush 20 interposed therebetween. It As a result, the boss 16 of the tank body 10 is inserted into the through hole 34 of the mounting bracket 30, and the protrusion 18 of the tank body 10 is fitted into the fitting hole 36 of the mounting bracket 30. Will be combined.

Therefore, in this state, the head of the boss 16 of the tank body 10 protruding from the through hole 34 of the mounting bracket 30 is ultrasonically caulked, so that the tank body 10 and the bush 20 can be very simply and easily. The mounting bracket 30 and the mounting bracket 30 are integrally assembled as shown in FIG. The tank body 10 is fixed at a desired position by bolting the mounting piece 38 formed on the peripheral portion of the mounting bracket 30 to a peripheral device such as a pump or a structural material.

Since burrs and the like are generated in the ultrasonic caulking portion and the appearance quality is deteriorated, in this embodiment, in order to hide the burrs, a resin covering plate 40 is mounted on the mounting bracket 30. It is attached. A through hole 42 for inserting the bush 20 is formed in the cover plate 40, and a concave portion for accommodating the ultrasonic caulking portion and a fitting hole 36 for the mounting bracket 30 are formed on a surface facing the mounting bracket 30. Is formed (see FIG. 1). Therefore, the convex portions of the cover plate 40 and the protrusions 18 of the tank body 10 that are brought into contact with each other through the fitting holes 36 of the mounting bracket 30 are ultrasonically welded to each other, so that the cover plate 40 and the tank body 10 are connected to each other. Will be an integral structure.

In such a reservoir tank mounting structure, the tank body 10, the bush 20 and the mounting bracket 30 are integrally coupled by a simple assembling method using ultrasonic caulking. There is. Therefore, unlike the conventional structure in which each of these parts is joined by insert molding, there is no problem such as a lack of wall or a gap at the boundary between the resin and the metal, or cracking. In addition, since the O-ring 22 arranged between the tank body 10 and the bush 20 provides good sealing performance, the problem of oil leakage can be effectively solved.

Further, even when the mounting position of the reservoir tank is different depending on the vehicle type, it can be dealt with only by changing the shape of the mounting bracket 30, so that the cost can be reduced and the productivity can be improved advantageously. There are also advantages.

The representative embodiments of the present invention have been described above in detail, but it goes without saying that the present invention is not subject to any restrictions due to the description of such embodiments. By the way. Further, in addition to the above-described embodiments, the present invention may be modified, modified, improved, and the like without departing from the spirit of the present invention. Should be understood.

For example, the number and arrangement of the bosses 16 of the tank body 10 and the through holes 34 of the mounting bracket 30 are not limited to those in the above-described embodiment, but the shapes of the tank body 10 and the mounting bracket 30 and the like. According to the above, it is possible to change appropriately.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a mounting structure portion of a reservoir tank of a power steering mechanism of an automobile to which the present invention is applied.

FIG. 2 is a perspective view showing each component used in the reservoir tank of FIG.

FIG. 3 is an explanatory sectional view showing an example of a conventional tank mounting structure.

[Explanation of symbols]

 10 Tank Main Body 12 Bush Assembly Hole 16 Boss 20 Bush 22 O-ring 24 Recessed Groove 26 Clamping Part 30 Mounting Bracket 32 Bush Insertion Hole 34 Through Hole 40 Cover Plate

Claims (1)

[Scope of utility model registration request] 1. A tank body made of resin, wherein: (a) a plurality of bosses are formed so as to project outwardly around a bushing mounting hole provided through the wall portion; and (b) one end side. A ring-shaped seal member is attached to the outer peripheral surface of the, and a metal bush having a pipe shape in which a clamping portion extending in the radial direction is formed on the outer peripheral surface closer to the center than the mounting position of the seal member, (C) A metal mounting bracket having a bush insertion hole and a plurality of through holes provided at positions corresponding to the bush assembly hole and the plurality of bosses of the tank body, respectively, and the bush of the tank body. One end side of the bush, to which the seal member is attached, is inserted into the assembly hole to seal between the tank body and the bush by the seal member, and the attachment bracket is attached to the bush. The tank main body and the mounting bracket are inserted through the through hole in the through hole, and the tank main body and the mounting bracket are overlapped with each other with the holding portion of the bush interposed therebetween, and the boss of the tank main body inserted through the through hole of the mounting bracket is ultrasonic. By being crimped,
A tank mounting structure characterized in that the tank body, the bush, and the mounting bracket are integrally assembled.