JPH04236887A - Quick connecting device - Google Patents

Abstract

PURPOSE: To facilitate installation and removal and to improve reliability of sealing by forming at least one sealing lip toward a bottom part from a free end so as to branch from a side wall on the free end of the side wall of a half section L shaped sealing member. CONSTITUTION: A sealing member constitutes a seal from a film molded of rubber or a similar material so as to be of a cup shape from a bottom part 131 and a side wall 132, and the bottom part 131 and the side wall 132 are formed on a half section L shaped metal frame 133 made of an arm which is long in the axial direction and an arm which is short in the radial direction. Additionally, a sealing surface facing against a drilled part is formed so that a connecting part of the bottom part 131 and the side wall 132 becomes a conical surface 136, two roughly symmetrical seal lipa 201, 202 extending from the end part toward the bottom part 131 are formed on a free end part of the side wall 132 and an outer surface of each of the lips 201, 202 is branched in the axial direction of the film.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention relates to a quick connection device for connecting a first end piece fixed to a coolant distribution duct or pipe of a vehicle engine to a test circuit, a heater unit, or other vehicle components. In this regard, the first end piece is provided with a perforation for a sealing member that is incorporated into the piece prior to the introduction of coolant into the engine.

0002

BACKGROUND OF THE INVENTION Such a device is described in European Patent Publication No. 0347279. In this device, a sealing member is incorporated into the device, and the sealing member constitutes a seal with a membrane formed from an elastic material such as rubber, and has the shape of a general cup. The bottom is perforated in the center and has a tear-away weakened section with arms radiating out like a star, the ends of which are attached to a circle around which a ring forms.

Although the device disclosed in EP 0 347 279 is satisfactory, it is clear that its performance can still be improved. It is therefore a general object of the present invention to improve such devices.

0004

SUMMARY OF THE INVENTION It is an object of the invention to provide a sealing member which does not require great forces during installation and which allows for considerable simplification of the other parts of the device.

Another object of the present invention is that after long-term use,
To provide a sealing member that does not require a large force to remove the seal and can be easily removed even when used for a long time without being removed.

Another object of the invention is to improve the sealing member so as to increase its reliability, especially from a sealing point of view.

Finally, another object of the invention is to improve the sealing member in such a way as to simplify its manufacture, especially with respect to manufacturing tolerances of the end pieces.

The present invention provides a connection between a first end piece fixed to a coolant distribution duct or pipe of a motor-driven vehicle engine and a second end piece of a test circuit, heater unit or other component of the vehicle. for the purpose of
The first end piece is provided with a perforation for a sealing member adapted to be placed within the end piece before filling the engine with coolant, the sealing member being molded from rubber or a similar material. It is a cup-shaped seal with a membrane, and has a weak part at the bottom that is torn by a hole in the center of the bottom, and this weak part forms a star shape from a circle and arms extending radially from the outer periphery of the circle. In a quick connection device formed on a half-section L-shaped frame, the free end of the side wall of the membrane formed on the half-section L-shaped frame has at least one, preferably two sealing lips extending from the side wall towards the bottom from the free end. It is characterized by being formed into branches.

Another feature of the invention is that the sidewall of the membrane is provided with an annular bead at least on its outer circumferential surface and preferably also on its inner circumferential surface.

Another feature of the present invention is that the bead portion on the outer circumferential surface is offset in the longitudinal direction from the bead portion on the inner circumferential surface.

In another embodiment, the bead portions on both the outer and inner circumferences are not offset in the longitudinal direction.

In a preferred embodiment of the invention, the free end of the side wall has two sealing lips, which lips are advantageously, but not necessarily, symmetrical with respect to the side wall. You don't have to. One of the lips, the outer lip, has a maximum diameter larger than the inner diameter of the portion of the first end piece to hold the second end piece in a sealed condition before attaching the second end piece to the first end piece. and the maximum diameter of the other inner lip is
The inner lip is smaller than the diameter of the second end piece to maintain a seal before being attached to the second end piece.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will become apparent from the following description, by way of example, taken in conjunction with the accompanying drawings.

A quick connection device according to the invention will now be described. Note that the present invention is not limited to this explanation. This device is for equipping an engine (not shown) with a hose or flexible pipe 111, which before installation is terminated at one end of a pipe 112, which is one of the components of the connecting device. Tested on a bench with a coolant circuit. The connecting device comprises a cylindrical inner sleeve 114 with axis A into which a pipe 111 is fitted which is held in place by a ring 115. The sleeve 114 is
It has an outer collar 116 that comes into contact with the pipe 111, and a collar 117 having a larger diameter than the collar 116. This collar 117 forms the bottom of the V-shaped space, and inside the V-shaped space is an inner cylindrical part 118 that is an extension of the sleeve 114.
and on the outside by means 120 for removably connecting to the male part 121 of the connecting device with the pipe 112, for example by an end piece 119 forming the female part of the connecting device with elastic lugs. Limited.

As in the device shown in European Patent Publication No. 0 347 279, the end of the inner barrel 118 is provided with an axially directed bore 125 held by radially extending arms 126. As also described in the above-mentioned application, a sealing member is incorporated into the end piece 119 in the pre-connection state to form the circuit as shown in FIG.

As clearly shown in FIGS. 3, 4, and 5, the sealing member 130 has a bottom portion 131 and a cup-shaped membrane formed from rubber or similar material from a side wall 132. A bottom part 131 and a side wall 132 constitute a seal.
is formed on a metal frame 133 that has an L-shaped half cross section and consists of a long arm in the axial direction and a short arm in the radial direction. As is clear from FIG. 3, the sealing surface facing the perforation 125 has a conical surface 136 at the joint between the bottom 131 and the side wall 132, and the free end of the side wall 132 has a conical surface 136. Two substantially symmetrical sealing lips 201, 202 are formed extending towards the membrane, and the outer surfaces of the lips diverge with respect to the axial direction of the membrane.

The side wall 132 further has bead portions 138 and 139 on an outer peripheral surface 137, and a bead portion 1 on an inner peripheral surface 140.
41 and 142 are formed to be shifted in the longitudinal direction with respect to the bead portions 138 and 139.

On the inner circumferential surface 140, the frame 1
Gaps 143, 144 are provided in the sides molded on 33, gap 143 is on the free end of the side wall, gap 144 is at the junction of the side wall and bottom 131, these gaps are formed during molding. This is to prevent the frame from deforming. During manufacturing, the bottom or membrane 13
1, for example, a part is formed that is weaker than a part of the film because it is thin (FIG. 5). These parts are for smooth tearing of the membrane and are arranged in a regular star shape, with the center part 0 merging with the center part of the bottom part 131, and the radial arms 1501, 1512, 1533... It extends from a thin central circular section 151 to a thicker section molded above the short radial arms 135 of the frame.

In FIG. 1, which shows the state before the engine is installed in a vehicle, the sealing member 130 is located a little away from the perforation 125 and seals the end piece 119, so that coolant can be poured in and no leakage can occur. A pressurized engine can be easily tested to detect if there is.

Next, when the engine containing the coolant is to be assembled on a vehicle assembly line, the male part of the connecting device is moved in the direction of arrow f in order to cooperate with the female part of the connecting device (FIG. 3). ). During this movement, the end 161 of the pipe 112 with the radial collar 162 is passed through the cup-shaped sealing member 130 so that the front end of the end 161 abuts the bottom part 144 of the cup. Male part 121 is indicated by arrow f
When the male part continues to move in the direction of the sealing member 130
When the perforation 125 approaches the perforation 125 and the perforation contacts the portion 151, it begins to tear the membrane 131, and this tear
50, the membrane abuts the outer surface of the inner barrel 118.

[0021] When the movement for drawing together the male and female parts of the connecting device is completed, the means 120 is actuated;
The state shown in FIG. 2 or the state shown enlarged in FIG. 6 is reached, in which the membrane 131 of the sealing member 130 is in contact with the outer peripheral surface of the inner cylindrical portion 118.

[0022] Sealed by lips 201 and 202,
bead portions 138, 139, and 141 of small dimensions;
The device of the present invention, in which the seal is secured by the seal 142, allows installation without the application of considerable force.

The connection device shown in FIG. 7 differs from that shown in FIG. 2 because the male end has an elastic guide fin 301.
, 302 and a collar 262, and the only difference is that the outer diameter is slightly reduced so as not to cause friction with the female end piece.

Since the lips 201 and 202 are used for sealing, there is no need to apply another seal.

However, in cases where excessive sealing capability is required, such a seal or another lip seal may be provided between the two end piece extensions indicated by dashed line 324 in FIG. Good too.

[Brief explanation of the drawing]

1 is a longitudinal sectional view of the device according to the invention before the end pieces are connected; FIG.

2 is a cross-sectional view similar to that of FIG. 1, but with the end pieces connected; FIG.

FIG. 3 is an enlarged longitudinal partial sectional view of a sealing member used in the device of the invention.

FIG. 4 is a view taken along arrow F in FIG. 3;

FIG. 5 is an enlarged cross-sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is an enlarged partial view of the device after the end pieces have been connected;

FIG. 7 is a view similar to FIG. 2, but with a different end piece;

[Explanation of symbols]

111 pipe 112 pipe 114 Sleeve 115 ring 116 color 117 Color 118 Cylindrical part 119 End piece 120 Connection means 121 Male part 125 Perforation part 126 Arm 130 Sealing member

Claims (5)

[Claims] 1. Connection between a first end piece fixed to a coolant distribution duct or pipe of a motor-driven vehicle engine and a second end piece on the side of a test circuit, heater unit or other component of the vehicle. The first end piece is provided with a perforation for a sealing member adapted to be placed within the first endpiece before filling the engine with coolant, the sealing member being cup-shaped and made of rubber. The seal is constructed from a membrane molded from or a similar material, and has a weak portion at the bottom that can be torn by drilling into the center of the bottom, and this weak portion extends radially from a circle and the outer periphery of the circle. In the quick connection device formed in a star shape from an arm, the free end of the side wall of the half-L-shaped sealing member has at least one sealing lip extending from the free end toward the bottom so as to branch from the side wall. A quick connection device characterized by being formed in. 2. Device according to claim 1, characterized in that the side wall has two sealing lips, the sealing lips being arranged symmetrically or asymmetrically with respect to the side wall. 3. The device according to claim 1, wherein the annular bead portion is formed on at least the outer circumferential surface of the inner and outer circumferential surfaces of the side wall. 4. The device according to claim 3, wherein the annular bead portion is formed on the inner and outer peripheral surfaces of the side wall so as to be shifted in the longitudinal direction. 5. The device according to claim 3, wherein an annular bead portion is formed on the inner and outer peripheral surfaces of the side wall without shifting in the longitudinal direction.