JPS6225845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine oil pipe connection device for fluid-tightly connecting an oil pipe to an oil supply path provided in a cylinder head of the engine.

Conventionally, an oil pipe connection device for liquid-tightly connecting an oil pipe to an oil supply passage connection port provided in the cylinder head of an engine has been used to connect the oil pipe in a radial direction to the circumferential side as shown in Figure 1. A connecting member 1 includes an eye joint 3 which is liquid-tightly connected to one end of a pipe 2 by brazing or the like, and a connecting bolt 5 having an L-shaped oil passage 4 bored therein. The male thread of the connecting bolt 5 which is inserted through the eye joint 3 and extends outward from the eye joint 3 is connected to the female thread of the inner peripheral surface of the connection port 9 at one end of the oil supply passage 8 provided in the cylinder head 7. By screwing into the connecting member 1, one end of the oil pipe 2 is fluid-tightly connected to one end of the oil supply path 8 via the connecting member 1. In such a conventional oil pipe connection device, the connection member 1 consists of the eye joint 3 and the connection bolt 5, which increases the number of parts and requires the work of machining a female thread on the inner circumferential surface of the connection port 9 of the cylinder head 7. It becomes necessary. Furthermore, burrs and burrs are likely to occur during machining of the female thread, and extra man-hours are required to remove them, which is a cause of increased production costs.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an oil pipe connection device for an engine that reduces the number of parts and the number of processing steps, and reduces production costs.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. FIG. 2 is a partially cutaway plan view of an engine to which the present invention is applied;
is an engine, and a cylinder head cover 17 is attached to the cylinder head 11 of the engine. The cylinder head 11 is provided with an oil supply passage 14, as shown in FIG. 3, and one end of the oil supply passage 14 is open to the cylinder head cover mounting surface of the cylinder head 11. One end connection port 1 of the oil supply path 14
5, one end of an oil pipe 13 is fluid-tightly connected to the oil pipe 13 by the oil pipe connecting device of the present invention, and the other end of the oil pipe 13 is connected to an oil pump (not shown). Then, the oil pipe 1 is connected to the oil tank (not shown) by the oil pump.
The lubricating oil supplied to the oil supply path 14 through the camshaft 6 lubricates the bearing portion of the camshaft 6 and other parts to be lubricated.

The oil pipe connection device of the present invention includes a connection member 1
It is equipped with 2. The connecting member 12 has a flange portion 12b protruding from the outer circumferential surface of one end of a cylindrical body portion 12a having an oil passage 12c penetrating along the internal axis. An annular groove 12d is carved on the outer peripheral surface of the intermediate portion. An oil pipe 13 is connected to one end of the oil passage 12c of the connecting member 12.
One end is fitted, and the outer circumferential surface of the oil pipe 13 and one end surface of the cylindrical body portion 12a are liquid-tightly connected and fixed by brazing or the like, and an O-ring (sealing member) 18 is fitted in the annular groove 12d. After fitting, the cylindrical body portion 12a is connected to the one end connection port 1 of the oil supply passage 14 of the cylinder head 11.
5, press-fit it in a liquid-tight manner. On the other hand, on the inner surface of the cylinder head cover 17, there is a
1, the rib 1 is pressed so as to press the flange portion 12b of the connecting member 12 against the cylinder head cover mounting surface of the cylinder head 11.
7d protrudes from the lower end surface 17 of the rib 17d.
e comes into contact with the flange portion 12b. Said rib 1
7d is the top plate portion 1 of the cylinder head cover 17.
It protrudes from 7a along the side wall 17b.
Therefore, the cylinder head cover 17 is inserted into the hole 17c of the top plate portion 17a of the cylinder head cover 17.
The cylinder head 11 is secured by the bolt 20 inserted into the cylinder head 11.
By screwing and tightening the cam holder 21 into the bolt hole 21a of the side cam holder 21, the tightening force causes the flange portion 12b of the connecting member 12 to contact the lower end surface 17e of the rib 17d and the cylinder head 11.
It is clamped and fixed between the cylinder head cover mounting surface and the cylinder head cover mounting surface.

As described above, in the present invention, the connecting member has a flange portion protruding from a part of the outer peripheral surface of a cylindrical body portion having an oil passage penetrating along the internal axis. The oil pipe is press-fitted liquid-tightly into the connection port at one end of the oil supply passage of the cylinder head via a seal member, and one end of the oil pipe is liquid-tightly connected and fixed to one end of the oil passage of the connection member. The flange portion can be clamped and fixed between the cylinder head and a rib extending along the side wall from the top plate portion on the inner surface of the cylinder head cover by the tightening force when the cylinder head cover is tightened and installed. This is how it was done.

Therefore, since the connecting member is made of a single component, 2
The number of parts is reduced compared to conventional models consisting of parts, and there is no need to machine a female thread on the inner circumferential surface of the connection port at one end of the oil supply path of the cylinder head, which reduces the number of machining steps. Since it is only necessary to attach the cylinder head cover to the cylinder head by press-fitting it into the connection port of the passage, the number of installation steps is also reduced, which significantly contributes to a reduction in production costs. Further, the rib of the cylinder head cover presses the flange portion of the connecting member against the cylinder head cover mounting surface of the cylinder head, and the rib protrudes from the top plate portion of the cylinder head along the side wall portion. Because of this, the ribs not only reinforce the cover but also serve as a pressing member, and there is no need to provide them individually, and the ribs have high strength and can provide a strong pressing force.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the main parts of an engine equipped with a conventional oil pipe connection device, and Figs.
The figure shows one embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the main part of an engine equipped with the oil pipe connection device of the present invention, and FIG. 3 is a cross section taken along the line - in FIG. 2. 4 are sectional views taken along the same line. 11... Cylinder head, 12... Connection member,
12c...Oil passage, 12a...Cylinder part, 12b...
Flange portion, 13... Oil pipe, 14... Oil supply path, 15... Connection port, 17... Cylinder head cover, 17d... Rib.

Claims (1)

[Claims] 1. A cylinder head cover is tightened and attached to the cylinder head side by bolts inserted through holes in the top plate, and a lubrication supply is provided inside the cylinder head and has one end open to the cylinder head cover mounting surface of the cylinder head. An oil pipe connection device for an engine that liquid-tightly connects one end of an oil pipe to a connection port at one end of a road via a connection member,
The connecting member has a flange protruding from the outer peripheral surface of one end of a cylindrical body having an oil passage penetrating along the internal axis, and the cylindrical body of the connecting member is connected to a connection port at one end of the oil supply passage. one end of the oil pipe is fluid-tightly connected and fixed to one end of the oil passage of the connecting member, and the cylinder head cover is tightened and attached to the cylinder head. The flange portion can be clamped and fixed between the cylinder head and a rib extending along the side wall from the top plate portion on the inner surface of the cylinder head cover by applying a tightening force at the time of the cylinder head cover. Engine oil pipe connection device.