JPS609508Y2 - rotary joint - Google Patents

Description

[Detailed description of the invention] This invention mainly relates to a rotary joint used in the middle of an oil drainage path, and was made for the purpose of reducing oil drainage resistance.

Conventionally, there was a rotary joint of this type as shown in FIG.

In the figure, 1 is a rotating part main body that can rotate around a horizontal axis, 2 is a joint fitted into this rotating part main body 1 via sleeves 3 and 4, and 5 is an integrated body of the rotating part main body 1 and the joint 2. 6 is a retaining ring for fixing the end plate 5 to the joint 2; 7 is an oil drain hole provided in the rotating body 1; 8 is an end plate 1 on the outer peripheral surface of the joint 2;
One or more oil drain holes are provided, and 9 is an oil drain hole provided in the center of the joint 2.

Next, its operation will be explained.

By connecting the oil drainage path of equipment (not shown) that swings or rotates around the horizontal axis center line of the rotating part main body 1 and the joint 2 to the oil drain hole 7 of the rotating part main body 1, the joint 2 can be drained. Oil is drained through oil holes 8 and 9.

Since conventional rotary joints are configured as described above, the oil drainage resistance becomes large due to the throttling effect of the eight oil drainage holes in the rotary joint and sudden changes in the flow direction. The oil drainage route had a drawback that made it unusable.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and provides a rotary joint with low oil drainage resistance.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3.

In the figure, 10 is a ring-shaped rotating part main body that has an oil drain hole 17 and can rotate around a horizontal axis center line, and 11 is fitted into one side of this rotating part main body 10 and has an oil drain hole 19. 15.1: a lid, 12 a blind wall fitted into the other side of the rotating part main body 10; 13 a connecting rod for fixing the lid 11 and the blind lid 12 at a constant interval; 14 a fixing nut thereof; 15.1
6 is an O-ring for preventing oil leakage, and 18 is an oil drainage space.

Next, its operation will be explained.

This can be achieved by connecting the oil drain path of a device (not shown) that swings or rotates around the horizontal axis center line of the rotating part main body 10, lid 11, and blind lid 12 to the oil drain hole 17 of the rotating part main body 10. The oil led from the oil drain hole 17 is transferred to the internal oil drain space 1.
The oil is drained from B through the oil drain hole 19 of one lid 11.

In this way, in the present invention, by installing the lid 11 having the oil drain hole 19 and the blind M12 on both sides of the rotating part main body 10, a sufficient space 18 is secured inside, that is, between the oil drain holes 17 and 19. Because of this structure, the oil draining resistance can be kept low and a smooth oil draining condition can be obtained.

In addition, in the present invention, the connecting rod 13 is passed between the lid 11 and the blind lid 12 at a position away from the center of rotation of the rotating part main body 10 so that they are connected and fixed to each other. This has the effect that the configuration is simple and inexpensive, without requiring any additional steps.

In addition, in the above embodiment, the description was limited to the oil drainage route, but
It can be used not only for oil drainage, but also for oil supply routes, or for media other than oil.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional rotary joint, FIG. 2 is a sectional view of a rotary joint according to an embodiment of the invention, and FIG. 3 is a side view of FIG. 2. In the figure, 10 is the main body of the rotating part, 11 is the lid, 12 is the blind lid, and 13
is a connecting rod, 17 is an oil drain hole (connection port), 18 is an oil drain space,
19 is an oil drain hole (connection port).

Claims (1)

[Scope of utility model registration request] A ring-shaped rotating part main body having an oil drain hole (connection port), a lid fitted into one side of the rotating part main body and having the oil drain hole (connection port), and a blind cover fitted into the other side of the cover, A rotary joint in which the lid and the blind lid are connected and fixed by a connecting rod inserted at a position apart from the center of rotation of the rotating part main body so that an oil drainage space is provided between the lid and the blind lid.