JP2000136892A - Connecting structure of upper and lower parts water hose made of synthetic resin for connecting engine and radiator to each other - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve water-tightness by a method wherein each seal ring is arranged on an outer peripheral surface of each upper and lower part connecting pipe, each end part of upper and lower part water hoses is brought into tight contact with each seal ring, and an annular bead, which is brought into tight contact with an outer peripheral surface of each upper and lower part connecting pipe at an opening side from each seal ring, is arranged. SOLUTION: Each annular groove 7 is arranged on each outer peripheral surface of each upper part connecting pipe 51 respectively protruded to an engine main body and a radiator main body, and each seal ring 6 is fitted to each annular groove 7. An opening (a) side from the annular groove 7 of each connecting pipe 51 is formed in a taper outer peripheral surface (c). Each annular bead 8 which is brought into tight contact with the seal ring 6 and wherein an annular opening edge (b) is brought into tight contact with the taper outer peripheral surface (c), is arranged on each end part of an upper part water hose 11. When one end part of the upper part water hose 11 is forcibly fitted from the opening (a) side to an outer peripheral surface of the upper part connecting pipe 51 of the radiator main body, one end part of the upper part water hose 11 is brought into tight contact with the seal ring 6, a space between the upper part water hose 11 and the upper part connecting pipe 51 is held in a water-tightness condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a synthetic resin upper and lower water hose for connecting an engine and a radiator, and more particularly, to connecting both ends of a synthetic resin upper water hose to an engine body and a radiator body, respectively. The outer connection surfaces of the two lower connection pipes which are fitted to the outer peripheral surfaces of the two upper connection pipes projecting from the opening side thereof, respectively, and the both ends of the synthetic resin lower water hose are respectively protruded from the engine body and the radiator body. The present invention relates to the improvement of the members fitted to the surfaces from their opening sides.

[0002]

2. Description of the Related Art Conventionally, a hose clip is generally used in this type of connection structure.

[0003]

However, when a hose clip is used, the hose clip must be fastened for each connection pipe, so that the efficiency is poor and the number of parts increases, resulting in an increase in the cost of the connection structure. ,
There is a problem.

[0004]

SUMMARY OF THE INVENTION The present invention makes it possible to connect the upper and lower water hoses efficiently without using a hose clip, and furthermore, the upper and lower water tubes made of the synthetic resin having high watertightness. An object of the present invention is to provide a hose connection structure.

[0005] To achieve the above object, according to the present invention,
Both ends of the synthetic resin upper water hose are fitted to the outer peripheral surfaces of both upper connecting pipes protruding from the engine body and the radiator body, respectively, from their opening sides. In the connection structure of the upper and lower water hoses respectively fitted to the outer peripheral surfaces of both lower connecting pipes projecting from the engine body and the radiator main body from their opening sides, each upper and lower connecting pipe is attached to the outer peripheral surface thereof. Each end of the upper and lower water hoses has a seal bead, and each end of the upper and lower water hoses has an annular bead that is in close contact with the seal ring and that is closer to the outer peripheral surface of the lower and upper connection pipes on the opening side than each seal ring. A connection structure for a synthetic resin upper and lower water hose is provided.

For example, when one end of the upper water hose is fitted to the outer peripheral surface of the upper connection pipe of the radiator body from the opening side, the one end of the upper water hose comes into close contact with the seal ring of the upper connection pipe. And the upper connection pipe are kept watertight. Also, even if a relatively large water pressure intermittently acts on the outer peripheral edge of the opening of the upper connection pipe due to pulsation of the cooling water,
The annular opening edge of the annular bead in the upper water hose does not expand away from the outer peripheral surface of the upper connection pipe, and as a result, the watertight state by the seal ring is maintained.

[0007] In this manner, the upper and lower water hoses can be connected to the upper and lower water hoses efficiently and with high watertightness by merely fitting both ends of the upper and lower water hoses into the upper and lower connection pipes without using a hose clip. It is possible to carry out with.

Further, according to the present invention, one of the annular retaining protrusion and the annular retaining recess which are engaged with each other is respectively closer to the engine body and the radiator body than the seal rings of the upper and lower connecting pipes. A connection structure for a synthetic resin upper and lower water hose is provided, wherein the other of the annular retaining protrusion and the annular retaining recess is provided at each end of the upper and lower water hoses. .

With this configuration, it is possible to reliably prevent, for example, the upper water hose from coming off the upper connection pipe of the radiator body.

According to the present invention, the annular retaining recess is formed by a second annular bead provided at each end of the upper and lower water hoses and in close contact with the outer peripheral surfaces of the upper and lower connecting pipes. And a connection structure for a synthetic resin upper and lower water hose.

For example, when the second annular bead of the upper water hose is brought into close contact with the outer peripheral surface of the upper connecting pipe of the radiator main body, the engagement of the annular retaining concave and convex portions is reliably maintained. In addition, since both sides of the contact portion of the upper water hose with the seal ring are in close contact with the outer peripheral surface of the upper connection pipe by the annular bead and the second annular bead, the adhesion of the upper water hose to the seal ring is enhanced.

[0012]

DETAILED DESCRIPTION OF THE INVENTION In Figure 1, both end portions of the synthetic resin upper hose 1 _1, both the upper connection pipe protruding respectively to the engine body 2a and the radiator main body 3a 4
_1, 5 ₁ outer peripheral surface of, and fitted respectively from the openings a side. The both end portions of the synthetic resin lower hose 1 _2, the outer peripheral surface of the engine body 2a and the radiator main body 3a to both lower connection tubes which project respectively 4 _2, 5 _2,
Each of them is fitted from the opening a side. Thus, in pumping action by the water pump of the engine 2 side, cooling the cooling water of the radiator 3 is supplied to the engine 2 through the lower hose 1 _2, heating cooling water heat-exchanged top water hose 1 in that the engine 2 The circulation of the cooling water is performed such as returning to the radiator 3 through ₁ .

As shown in FIG. 3, each of the upper and lower connecting pipes 4 ₁ , 5 ₁ ; 4 ₂ , 5 ₂ has an annular groove 7 on its outer peripheral surface, and a seal ring 6 is fitted into each annular groove 7. Have been. Also each tube 4 _1, 5 _1; 4 _2, 5 ₂ of the opening a of the annular groove 7
The side is formed on a tapered outer peripheral surface c whose diameter decreases toward the opening a. On the other hand, as clearly also in FIG. 2, on each end of the lower water hose 1 _1, 1 _2, in close contact with the sealing ring 6, also on the lower connecting pipe 4 _1, 5 _1; 4 _2, 5 _second seal ring 6, thus the tapered outer circumferential surface c in the opening a side of the annular groove 7 has an annular bead 8 which is brought into close contact with the annular opening edge b.

[0014] For example the end portion of the upper water hose 1 _1, the outer peripheral surface of the upper connecting pipe 5 ₁ of the radiator main body 3a, is forcibly fitted from the opening side a one end of the upper hose 1 ₁ upper connection since close contact with the sealing ring 6 of the tube 5 _1, between the upper water hose 1 ₁ and the upper connecting pipe 5 ₁ is held watertight. The relatively large pressure on the opening a peripheral edge of the upper connecting pipe 5 ₁ by pulsation of the cooling water acts intermittently, annular opening rim b upper connecting pipe 5 of the annular bead 8 in the upper hose 1 _{1 The} diameter does not increase away from the outer peripheral surface c of the _first taper. As a result, the watertight state by the seal ring 6 is maintained.

Further, each of the upper and lower connecting pipes 4 ₁ , 5 ₁ ; 4
_2, 5 ₂ has a sealing ring 6, thus annular retaining protrusions 9 respectively positioned on the engine main body 2a and the radiator main body 3a side of the annular groove 7. Each of the annular retaining projections 9 has a sawtooth cross section, and the outer peripheral surface d on the opening a side is
For example, to facilitate the fitting of the upper water hose 1 ₁ is formed in a tapered surface gradually reduced in diameter toward the ridgeline on the opening side a, also engaging surface e, for example the upper connecting pipe 5 ₁ radiator body 3a Are orthogonal to the axis f. Furthermore, lower water hose 1 _1, 1 each end of the ₂ has an annular retaining recess 10 for engaging the annular retaining protrusion 9. Each annular retaining recess 10
Has a substantially U-shaped cross section. For example, an engaging surface g on the radiator main body 3a side is engaged with an engaging surface e of the annular retaining projection 9. Each of the annular retaining recesses 10 has upper and lower hoses 1 ₁ , 1
₂ at each end, upper and lower connecting pipes 4 ₁ , 5 ₁ ;
Are formed in four _2, 5 ₂ outer circumferential surface of the second annular bead 11 which is adhered to the annular opening edge h.

[0016] With this configuration, for example, the upper water hose 1 _1, omission can be reliably prevented from top connection pipe 5 ₁ of the radiator main body 3a. Also for example, a circular opening edge h of the upper water hose 1 ₁ of the second annular bead 11 is adhered to the upper connection pipe 5 ₁ outer peripheral surface of the radiator main body 3a, an annular retaining concave, engagement of the projections 9, 10 It is surely maintained. The upper water hose 1 ₁ on both sides of the contact portion of the seal ring 6 is ahead of the annular bead 8 and the second annular bead 1
Since close contact with the outer peripheral surface of the upper connecting pipe 5 ₁ a 1, the adhesion of the upper water hose 1 ₁ relative to the seal ring 6 is strengthened.

The upper and lower connecting pipes 4 ₁ , 5 ₁ ; 4 ₂ ,
5 _2, the engine body 2a and the radiator main body 3a
In addition to those directly protruding from the connector body, a so-called quick connector also includes a tubular body detachable from a connector body attached to the engine body 2a or the like. Also on an annular retaining protrusion 9, provided in the lower water hose 1 _1, 1 _2, whereas,
On the annular retaining recess 10, the lower connecting pipe 4 _1, 5 _1;
4 _2, 5 ₂ to providing is also possible.

[0018]

According to the first aspect of the present invention, the upper and lower water hoses can be connected efficiently and with high water tightness, and the number of parts can be reduced to reduce the cost. A connection structure for a resin upper and lower water hose can be provided.

According to the second aspect of the present invention, the upper and lower water hoses can be reliably prevented from coming off.

According to the third aspect of the present invention, the upper and lower water hoses can be kept from coming off, and the adhesion of the upper and lower water hoses to the seal ring can be increased.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state in which an engine and a radiator are connected by upper and lower water hoses.

FIG. 2 is a schematic perspective view of a radiator to which upper and lower water hoses are connected.

FIG. 3 shows a hose connection structure, and corresponds to, for example, a sectional view taken along line 3-3 in FIG.

[Explanation of symbols]

1 ₁ , 1 ₂ ... Upper and lower water hoses 2a ... Engine body 3a ... Radiator body 4 ₁ , 5 ₁ ... Upper connecting pipe 4 ₂ , 5 ₂ ... Lower connecting pipe 6 ………………………………………………………………………………………………………………………………………………………………………………………… ······································································ ……………… Aperture

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Teruaki Kitano 1-4-1 Chuo, Wako-shi, Saitama F-term in Honda R & D Co., Ltd. (Reference) 3H017 KA04

Claims (3)

[Claims] 1. A synthetic resin upper water hose (1)₁) Both ends
Parts, the engine body (2a) and the radiator body (3
The upper connecting pipes (4) projecting from ₁, 5₁)
Are fitted on the outer peripheral surface of
In addition, synthetic resin lower water hose (1_Two)
Gin body (2a) and radiator body (3a)
Both lower connecting pipes (4_Two, 5_Two) Outer peripheral surface
And the upper and lower parts respectively fitted from the opening (a) side.
In the connection structure of the water hose, each upper and lower connection pipe
(4₁, 5₁; 4_Two, 5_Two) Is seal ring
(6), the upper and lower water hoses (1₁, 1_Two)
Each end of the seal ring is in close contact with the seal ring (6).
On the opening (a) side of the seal ring (6)
Upper and lower connecting pipes (4₁, 5₁; 4_Two, 5_Two) On the outer surface
Characterized in that it has an annular bead (8) that adheres,
Made of synthetic resin to connect between engine and radiator,
Connection structure for lower water hose. 2. One of the annular retaining projections (9) and the annular retaining recesses (10), which engage with each other, is formed on each of the upper and lower connecting pipes (4 ₁ , 5 ₁ ; 4 ₂ , 5 ₂ ). The seal ring (6) is provided closer to the engine body (2a) and the radiator body (3a) than the seal ring (6), and the other of the annular retaining protrusion (9) and the annular retaining recess (10) is are provided at each end of the lower water hose (1 _1, 1 _2), the synthetic resin for connecting the claim 1, wherein the engine and the radiator, the connection structure of the lower water hose. 3. The annular retaining recess (10) is provided
Upper and lower water hose (1 ₁, 1_Two) At each end
Upper and lower connecting pipes (4₁, 5₁; 4_Two, 5_Two) On the outer surface
Formed by a second annular bead (11) that is in intimate contact
The engine and the radiator according to claim 2 are connected.
Upper and lower water hose connection structure made of synthetic resin.