JPH0338530Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a mounting device for a distribution valve, and more specifically, to a means for preventing oil leakage when installing a distribution valve to a discharge port of a main oil distributor, etc. It is.

[Technical background of the invention]

In a centralized lubrication/oil supply system, etc., a main oil distributor having multiple discharge ports is provided in the temporary side piping path including the oil supply pump, and a resistance-type distribution valve, for example, is attached to the discharge port, and each oil supply point is connected from there. A predetermined amount of lubricant is supplied to the In that case, a discharge port 1 as shown in FIG. 2 is formed on the main oil distributor side, and a distribution valve 2 is screwed into this discharge port 1, but this conventional example According to the above, there is a high risk of liquid leakage. That is, the discharge port 1 has a female threaded hole 1a and a funnel-shaped tapered surface 1b connected to the bottom thereof, and on the other hand, the dispensing valve 2 side has a female screw hole 1a and a funnel-shaped tapered surface 1b continuous to the bottom thereof. For example, a rectifying bush 3 is provided, which is fitted into the inflow port so that a part thereof protrudes to the outside.The male thread 2a is screwed into the female thread 1a. Accordingly, the end of the bush 3 is brought into contact with the tapered surface 1b, and the metal seal prevents liquid leakage. However, since the female screw hole 1a is formed by tapping a pilot hole formed during die-casting, it often becomes eccentric or tilted with respect to the tapered surface 1b during the hole machining process. This may cause liquid leakage.

[Purpose of invention]

This invention has been developed in view of the above-mentioned drawbacks of the prior art, and its purpose is to provide a mounting device for a distribution valve that provides a reliable sealing means for the discharge port.

[Example] Hereinafter, this invention will be explained in detail with reference to an example shown in FIG.

As for the discharge port 1 provided on the main oil distributor side, as in the conventional case, for example, a pilot hole may be formed in advance during die-casting, and then a female threaded hole 1a may be formed by tapping into the pilot hole. Further, like the conventional distribution valve 2, a male thread 2a is formed at the inflow side end of its body to be screwed into the female threaded hole 1a, and a part of the distributing valve 2 is provided with, for example, a bushing 3 for rectification in the inflow port. However, in this invention, at the end of the bush 3, a contact allowance 4 is left in contact with the tapered surface 1b, so that the bushing 3 is fitted so as to protrude to the outside. An annular sealing rubber 5 that is in liquid-tight contact is integrally attached, for example, by baking. That is, the sealing rubber 5 is attached around the protruding end 3a formed to have a smaller diameter than the contact margin 4,
As a result, when attaching the distribution valve 2 to the discharge port 1 by screwing the male screw 2a into the female screw hole 1a, the contact margin 4 and the sealing rubber 5 are preferably simultaneously applied to the tapered surface 1b of the discharge port 1. Therefore, even if there is some eccentricity error in the female threaded hole 1a, the sealing rubber 5 reliably prevents liquid leakage. Also, according to this idea, the winning price is 4
, there is almost no risk of the sealing rubber 5 being crushed even if the screw is tightened too strongly.

In this embodiment, a resistance type distribution valve is used as the distribution valve 2, in which a pin 7 for flow rate adjustment is fitted loosely into an orifice 6 penetrated through the body of the distribution valve. However, the present invention is not limited to, and may be applied to other types of distribution valves.

〔effect〕

As is clear from the above description of the embodiment, according to this invention, a tapered surface 1b is provided at the end of the bush 3 opposite to the tapered surface 1b of the discharge port 1.
By attaching the sealing rubber 5 having a diameter smaller than that while leaving a contact allowance 4 for contacting the discharge port 1, it is possible to reliably prevent liquid leakage even if there is a machining error in the female threaded hole 1a of the discharge port 1. can. Further, since the contact margin 4 prevents an excessive tightening force on the sealing rubber 5, the sealing rubber 5 will not be crushed, and the effect is remarkable.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention.
FIG. 2 is a schematic sectional view showing a conventional example. In the figure, 1 is a discharge port, 1a is a female thread, 1b is a tapered surface, 2 is a distribution valve, 2a is a male thread, 3 is a bush, 3a is a protruding end, 4 is a contact area, 5 is a sealing rubber, 6 is a Orifice 7 is a pin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A discharge port having a female screw hole and a funnel-shaped tapered surface connected to the bottom of the main oil distribution device, etc. is formed, and the inflow side end of the distribution valve body A male thread is formed to be screwed into the female threaded hole, and a bush is fitted into the inflow port so that one end of the bush protrudes to the outside, and the end of the bush is brought into contact with the tapered surface. In the distribution valve mounting device for attaching the distribution valve to the discharge port, the end of the bush has a contact area that contacts the tapered surface, and a contact area that contacts the tapered surface in a liquid-tight manner. A mounting device for a distribution valve characterized by having an annular sealing rubber. (2) The distribution valve mounting device according to claim (1), wherein the sealing rubber is integrally baked onto the bushing.