JPH04109422U - Installation structure of the cooling water connection port on the engine body - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a structure for mounting a cooling water connection port on an engine body to prevent leakage of cooling water. The purpose is to ensure that water leaks from the engine body by tightly contacting it with the mounting surface of the engine body. [Structure] The sealing material is composed of an O-ring 6, and the cooling water connection port 1 has a mounting part 4 that contacts the mounting surface 103 of the engine body 101, and is located inside the mounting part 4. An annular groove 5 is formed on the outer periphery of the tube body 2, and a contact surface 6A that contacts the mounting surface 103 of the engine body 101 protrudes from the mounting portion 4 by a predetermined amount in the annular groove 5 when not compressed. Ring 6 was compressed and installed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on the installation of a cooling water connection port on the engine body to prevent cooling water leakage. Regarding structure.

0002

[Conventional technology]

Generally, in order to cool the radiator, the radiator and the engine body are connected to a pair of mounts. It is connected via a water hose, and the water hose in the engine body The connection part has a water inlet and a water outlet as connection ports for cooling water. is installed. When installing the cooling water connection port, be sure to Prevention of cooling water leakage from inside is required, for example, The mounting structure for the cooling water connection port on the engine body is known.

0003 Figures 4 to 6 are examples of the mounting structure of this type of cooling water connection port on the engine body. shows. In FIGS. 4 and 5, 101 is an engine body in which a cooling water passage 102 is formed. , a mounting surface 103 is formed on the wall surface where the cooling water passage 102 opens. . This mounting surface 103 has three bolt mounting holes 103A (only one hole is shown in the figure). ) is bored surrounding the cooling water passage 102.

0004 In FIGS. 4 to 6, 104 is a water outlet for cooling water. This cooling water connection port 104 is a connection port, and this connection port 104 is connected to a pipe body 105. The mounting portion 106 includes a mounting portion 106 consisting of a pedestal formed at the opening portion. 6, insert three bolts into the positions corresponding to the three bolt mounting holes 103A. A through hole 106A is provided surrounding the tube body 105. 107 is from the gasket It has the same shape as the mounting part 106 of the cooling water connection port 104. .

[0005] Then, cooling is applied to the mounting surface 103 of the engine body 101 via a sealing material 107. Press the water connection port 104 and insert the hole in the pipe body 105 of the cooling water connection port 104 into the engine. Each button of the mounting part 106 is aligned with the cooling water passage 102 of the engine main body 101. Insert three bolts 108 (only one is shown in the figure) into each bolt insertion hole 106A. When the bolts are passed through and screwed into each bolt mounting hole 103A, cooling is provided to the engine body 101. The water connection port 104 is connected to the bolts 108 through the sealing material 107 between each bolt 108. Clamped at a distance. Note that as the sealing material 107, a gasket is used. It can also be used as a sealing agent instead of a sheet. In addition, the engine body 101 includes a war A cooling water connection port 109 consisting of a water inlet is installed. The mounting structure of the water connection port 109 is a cooling water connection consisting of a water outlet. The mounting structure is similar to that of the opening 104.

[0006]

[Problem that the idea aims to solve]

However, with the conventional mounting structure of the cooling water connection port on the engine body, The mounting part 106 of the cooling water connection port 104 is attached to the mounting surface 103 of the engine body 101. Three bolts 108 are arranged with a distance between each bolt 108 via a wall material 107. Connect the cooling water connection port 104 to the engine body 101 by tightening the Since the tightening force of the three bolts 108 is the same as that of the bolt 10 of the sealing material 107, 8 and tightened by three bolts 108 in the sealing material 107. The contact pressure near the bolt 108 is large, but the contact pressure at the part far from the bolt 108 is small. Ru. Therefore, the sealing material 107 is not subjected to pressure uniformly over the entire circumference, and the surface pressure is It is uneven.

[0007] Therefore, a part of the sealing material 107 is tightly attached to the mounting surface 103 of the engine body 101. water from the cooling water passage 102 of the engine body 101 without contacting the There was a risk of leakage occurring. In addition, in order to install the cooling water connection port 104, the number of bolts must be increased and By narrowing the distance between the bolts, the surface pressure of the sealing material 107 can be made uniform. However, this is not preferable because it unnecessarily increases the number of man-hours required for installing the bolt 108.

[0008] This invention was devised to solve the above-mentioned problem, and its purpose is to The seal material can be placed in close contact with the mounting surface of the engine body while reducing the number of installation steps. It is possible to reliably prevent water leakage from the engine body. An object of the present invention is to provide a mounting structure for a cooling water connection port to an engine body.

[0009]

[Means to solve the problem]

This invention connects the cooling water connection port to the engine body using multiple bolts through a sealing material. By tightening, the pipe body of the cooling water connection port is connected to the cooling water connection formed in the engine body. In the mounting structure of the cooling water connection port that communicates with the cooling water passage to the engine body. , the sealing material is composed of an O-ring, and the cooling water connection port is connected to the engine body. It forms a mounting part that contacts the mounting surface, and also forms a pipe body located inside this mounting part. An annular groove is formed on the outer periphery of the engine body, and the annular groove is in contact with the mounting surface of the engine body. The O-ring, which protrudes a predetermined amount from the mounting part when the contact surface is not compressed, was compressed and installed. It is characterized by

0010

[Effect]

In this invention, the annular groove of the cooling water connection port is provided with a When the contact surface is not compressed, the O-ring that protrudes from the mounting part by a predetermined amount is compressed. Since the O-ring is mounted, the O-ring receives pressure over its entire circumference, and the surface pressure is uniform. It becomes.

[0011]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. Figures 1 to 3 are the invention Fig. 3 shows an attachment structure of a cooling water connection port to an engine body according to an embodiment of the present invention. Furthermore, that The overall structure is shown in Figure 4, and the same components as the conventional example are given the same symbols. .

0012 In the figure, 101 is the engine body, in which a cooling water passage 102 is formed. A mounting surface 103 is formed on the wall surface through which the water cooling passage 102 opens. This cover Three bolt mounting holes 103A are bored in the mounting surface 103 surrounding the cooling water passage 102. It is set up. 1 is made of resin (for example, nylon 66 mixed with 30% glass fiber). This cooling water connection port consists of a water outlet (oil). 1 has a tube body 2, and a cooling water passage 102 is provided at the opening of the tube body 2. A guide part 3 to be fitted and inserted is formed, and a pedestal is not provided on the outer peripheral surface of the pipe body 2. An annular attachment portion 4 is formed. The mounting surface of this mounting portion 4 is the engine body 10. It is designed to come into contact with the mounting surface 103 of 1, and is also connected to the cooling water connection port 1. , there are three bolt insertion holes 4A at positions corresponding to the three bolt installation holes 103A. are provided surrounding the tube body 2, respectively. In addition, between the three bolt insertion holes 4A are separated by a distance. The cooling water connection port 1 is located inside this mounting part 4. An annular groove 5 is formed integrally with the mounting portion 4 on the outer periphery of the tube body 2. Circle of annular groove 5 The width in the circumferential direction is such that a sufficient distance is secured even when the O-ring 6 (described later) is compressed. Ru.

[0013] In Fig. 2, 6 is an O-ring which is fitted onto the cooling water connection port 1 and is attached to the engine main body. The O-ring 6 is shown in an uncompressed state before being attached to the body 101, and the O-ring 6 is The contact surface 6A protrudes from the mounting portion 4 by a predetermined amount when not compressed. It's out. Then, cooling water is applied to the mounting surface 103 of the engine body 101 via the O-ring 6. Press down on the cooling water connection port 1, and insert the guide portion 3 of the pipe body 2 of the cooling water connection port 1 into the engine main body. Each bolt of the mounting part 4 is fitted and inserted into the cooling water passage 102 of the body 101. Pass the bolts 7 through the through holes 4A, and screw them into each bolt mounting hole 103A. When the cooling water connection port 1 is inserted into the engine body 101 via the O-ring 6, the bolt is inserted into the engine body 101. The O-ring 6 is tightened by the ring 7 and the O-ring 6 is attached to the engine body 101 in the annular groove 5. It is compressed and installed by receiving pressure from the surface 103. That is, the O-ring 6 is is accommodated in the annular groove 5 in a state compressed by a certain amount, and the annular groove 5 and the annular groove 5 are It is sandwiched between the mounting surface 103 of the engine body 101 that is in contact with the mounting part 4 that is integrated with the held.

[0014] Note that the engine body 101 has a cooling water connection port consisting of a water inlet. (corresponding to the cooling water connection port 109 in Figure 4) is installed, and this cooling water The installation structure of the cooling water connection port 1 consists of a water outlet. It is said that the structure is similar to that of the attached structure. According to the above configuration, the O-ring 6 is placed under pressure in the annular groove 5 of the cooling water connection port 1. Since it is installed in a compressed manner, even if the distance between each bolt 7 is separated, The O-ring 6 is attached not only to the part tightened by the bolt 7, but also to the part tightened by the bolt 7. Parts that are far apart also receive pressure, and the pressure is applied all around, making the surface pressure uniform. be able to. As a result, the entire contact surface 6A of the O-ring 6 is in contact with the engine. It is in close contact with the mounting surface 103 of the main body 101, and the bolt 7 is not attached. While reducing man-hours, the engine body 101 due to uneven surface pressure of the O-ring 6 can be reduced. Water leakage from the cooling water passage 102 can be prevented.

[0015] Further, the O-ring 6 is in contact with the annular groove 5 and the mounting portion 4 that is integrated with the annular groove 5. Since it is sandwiched between the mounting surface 103 of the engine body 101, the pressure is It is possible to maintain a constant amount of shrinkage, prevent pressure increase and compression, and prevent the occurrence of compression set. Wear. Furthermore, since the O-ring 6 is fitted externally to the cooling water connection port 1, the O-ring 6 is This prevents the O-ring 6 from slipping and ensures its seal. Workability during attachment to the water cooling connection port 1 can be improved.

[0016] The cooling water passage 102 is located at the portion where the pipe body 2 of the cooling water connection port 1 opens. A guide part 3 is formed to be inserted into the cooling water connection port 1. Workability during attachment to the engine body 101 can be improved.

[0017]

[Effect of the idea]

As explained above, according to the present invention, the O-ring is inserted into the annular groove of the cooling water connection port. The O-ring is compressed and installed, so the O-ring is tightened with the bolt. Not only the parts, but also the parts far away from the bolt receive pressure, and the pressure is applied all around the circumference. This allows the surface pressure to be evened out. Therefore, the contact surface of the O-ring is It is in close contact with the mounting surface of the engine body over the entire surface, making it difficult to install bolts. Cooling water in the engine body due to uneven O-ring surface pressure while reducing installation time. Water leakage from the passage can be prevented.

[0018] In addition, the O-ring is connected to the annular groove of the cooling water connection port and the engine that is in contact with the mounting part. Since it is sandwiched between the mounting surface of the engine body, the amount of compression is kept constant and the pressure increases. - It has the effect of preventing compression and preventing the occurrence of compression set.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a structure for attaching a cooling water connection port to an engine body according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the same mounting structure showing a state before the O-ring is mounted to the engine body.

FIG. 3 is a view taken in the direction of arrow A in FIG. 1;

FIG. 4 is a side view showing an entire structure for attaching a conventional cooling water connection port to an engine body.

FIG. 5 is a sectional view taken along line CC of the same mounting structure.

FIG. 6 is a view taken in the direction of arrow B in FIG. 5;

[Explanation of symbols]

1 Cooling water connection port 2 Pipe body 4 Mounting part 5 Annular groove 6 O-ring 6A Contact surface 7 bolts 101 Engine body 102 Cooling water passage 103 Mounting surface

Claims (1)

[Scope of utility model registration request] Claim 1: By tightening the cooling water connection port (1) to the engine body (101) with a plurality of bolts (7) through a sealing material, the pipe body (2) of the cooling water connection port (1) In the mounting structure for attaching a cooling water connection port to an engine body, which communicates with a cooling water passage (102) formed in an engine body (101), the sealing material is constituted by an O-ring (6), and the cooling water The water connection port (1) is formed with a mounting part (4) that contacts the mounting surface (103) of the engine body (101), and the pipe body (2) is located inside this mounting part (4). ) an annular groove (5) is formed on the outer periphery of the
In this annular groove (5), there is an O-ring (6) whose contact surface (6A) that contacts the mounting surface (103) of the engine body (101) protrudes from the mounting portion (4) by a predetermined amount when it is not compressed. A structure for attaching a cooling water connection port to an engine body, which is characterized in that the cooling water connection port is compressed and installed.