JPH0723674Y2 - Universal fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a universal pipe joint used for swingably connecting pipes, and more specifically, a partially spherical first sliding contact surface is formed. And an outer peripheral body having a second sliding contact surface of a partial spherical shape that is in sliding contact with the first sliding contact surface,
By fitting the first sliding contact surface and the second sliding contact surface, the inner cylindrical body and the outer cylindrical body are connected so as not to be able to be pulled out and relatively swingable,
The outer tubular body is divided into a first tubular body and a second tubular body that are fitted to each other along the circumferential direction while sandwiching the first sliding contact surface. The outer tubular body is divided into the first tubular body and the second tubular body. The cylinder is the first
The keys are connected via an arc-shaped key fitted over both of the annular circumferential grooves formed on each of the fitting surfaces of the tubular body and the second tubular body, and the key is the key of the both annular circumferential grooves. The present invention relates to a universal pipe joint that is elastically deformed and fitted in both sides.

[Conventional technology]

In the universal pipe joint, when connecting the first cylinder and the second cylinder to each other, instead of connecting them through a flange whose outer shape tends to be large, an arc-shaped key is fitted in one annular peripheral groove in advance. After fitting, the first tubular shape and the second tubular shape are fitted,
After that, the key is elastically deformed in the radial direction so that it fits over both of the annular circumferential grooves, and the two are compactly connected, but conventionally, the key was forcibly elastically deformed with a bolt. Is fitted over both of the annular peripheral grooves (see, for example, Japanese Utility Model Publication No. 56-18768).

[Problems to be solved by the device]

Forcibly elastically deform the key with bolts
Since the cylinder is connected, if the key is restored and deformed due to loosening of the bolt during long-term use, the key may be separated from one of the annular circumferential grooves, which is not reliable. is there.

The present invention has been made in view of the above circumstances, and includes the first
It is an object of the present invention to provide a universal joint which is highly reliable and can be used for a long period of time by devising a connecting mechanism for connecting the tubular body and the second tubular body.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is characterized in that, in the universal pipe joint, the key is elastically deformed in the radial direction by an elastic deformation force of the key itself and extends over both of the annular circumferential grooves. Since it is inserted, the following operational effects can be obtained from this configuration.

[Action]

The key can be maintained in the fitted posture without using an artificial operation member such as a bolt that easily loosens or rattles during long-term use.

[Effect of device]

Therefore, there is no risk that the key will come off from one of the annular circumferential grooves during long-term use, and the key can be used for a long time with high reliability.

[First Embodiment] FIG. 1 shows an inner cylindrical body (1) having a partially spherical first sliding contact surface (1a) and a partially spherical first sliding contact surface (1a). 2 shows a universal pipe joint provided with an outer cylindrical body (2) having a sliding contact surface (2a).

The inner cylindrical body (1) is slidably fitted on a spherical ring (4) having the first sliding contact surface (1a) formed on a sleeve (3) having a pipe flange (3a) formed thereon. Composed of
The ring member (3b) is fitted on the sleeve (3) to prevent the sleeve (3) from coming off.

The outer cylinder body (2) is divided into a first cylinder body (5) having a pipe flange (5a) and a second cylinder body (6) fitted in the first cylinder body (5). , The first sliding contact surface (1a) of the spherical ring (4) cannot be slipped out and is relative to the second sliding contact surface (2a) formed on both the first cylindrical body (5) and the second cylindrical body (6). It is fitted so that it can swing freely.

The fitting surface (5) between the first tubular body (5) and the second tubular body (6)
b) and (6b) are respectively formed with annular peripheral grooves (5c) and (6c), and arcuate spherical keys (7) are fitted over both of these annular peripheral grooves (5c) and (6c). The first tubular body (5) and the second tubular body (6) are connected together.

The key (7) is cut at one location in the circumferential direction so that the inner diameter is larger than the outer diameter of the fitting surface (6b) of the second tubular body (6) and the outer diameter is the first tubular body. The annular shape of the first tubular body (5) is formed in a C-shape that is elastically deformable in the radial direction over a state where the inner diameter of the fitting surface (5b) of (5) is smaller than that of the fitting surface (5b). The outer diameter is larger than the inner diameter of the circumferential groove (5c).

Then, the key (7) is elastically deformed in the radial direction by the elastic deformation force of the key (7) itself, so that both annular peripheral grooves (5c),
It is fitted over both sides of (6c).

Next, a method for assembling the universal joint according to the present invention will be described.

As shown in FIG. 2, the annular peripheral groove (6c) of the second tubular body (6).
The key (7) is loosely fitted in the sleeve (3), the sleeve (3) is inserted between the second tubular body (6) and the spherical ring (4), and the ring member (3b) is attached to the sleeve (3). And the spherical ring (4).

Next, as shown in FIG. 3, a spherical ring (4) is formed between the second sliding contact surface (2a) of the first tubular body (5) and the second sliding contact surface (2a) of the second tubular body (6). ) Is fitted to the first sliding contact surface (1a) so as to be caught.

At this time, as shown in FIG. 4, the key (7) is forcibly elastically deformed in the diameter reducing direction by the fastener (8), and the outer diameter of the key (7) is set in the annular peripheral groove (6c) as the first cylindrical body. Keeping the diameter smaller than the inner diameter of the fitting surface (5b) of (5), the fitting surface (5
Insert into b).

The fastener (8) is inserted through the notch (6a) facing the annular groove (6c) formed in the second tubular body (6), and the hole (7a) formed at the end of the key (7). It is forcibly elastically deformed.

Next, when the fastener (8) is removed from the key (7), the key (7) elastically deforms in the radial direction, and as shown in FIG.
The first annular groove (5c), which is fitted over both (6c)
The sliding contact surface (1a) is fitted so as not to slip out and to be relatively swingable.

Next, even if the key (7) fitted over both of the annular circumferential grooves (5c) and (6c) tries to deform in the diameter reducing direction, the key (7) can be prevented from being deformed. As shown in FIG. 5, the piece (9) is inserted into the space formed between both ends of the key (7) so as not to move in the circumferential direction, and is screwed to the side surface of the second tubular body (6). Fix and complete the assembly.

[Second Embodiment] FIGS. 6, 7, and 8 show that the key (7) is elastically deformed in the diameter-reducing direction by the elastic deformation force of the key (7) itself, and both annular peripheral grooves (5c) are shown. ) And (6c) are shown.

The key (7) has a state where the outer diameter is smaller than the inner diameter of the fitting surface (5b) of the first tubular body (5) and the inner diameter thereof is the fitting surface (6b) of the second tubular body (6). ) Is formed into a C-shape that is elastically deformable in the radial direction over a state in which the diameter is larger than the outer diameter, and the annular circumferential groove (6c) of the second tubular body (6) is in a state where no external force is applied.
The inner diameter is smaller than the inner diameter.

As shown in FIG. 7, the inner diameter of the key (7) is screwed into two bolts (10) whose both ends are screwed from the outer peripheral surface side of the first tubular body (5). Is held in the annular peripheral groove (5c) with a diameter larger than the outer diameter of the fitting surface (6b) of the second tubular body (6), and the first tubular body (5) and the second tubular body (6) are connected to each other. After mating,
When the bolt (10) is unscrewed, as shown in FIG. 8, it is elastically deformed in the radial contraction direction, and the annular peripheral grooves (5c), (6c).
Is inserted over both sides.

Other configurations are similar to those of the first embodiment.

[Other Examples]

 I. The key may be divided into a plurality in the circumferential direction.

B. The second cylinder may be externally fitted and connected to the first cylinder.

C. In the second embodiment, the circumferential length of the key (7) is
It is desirable to set the length of the annular circumferential grooves (5c), (6c) to about the length of the annular circumferential grooves (5c), (6c) fitted together.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a universal pipe joint according to the present invention. Fig. 1 is a sectional side view, Fig. 2 is a partial sectional side view, Fig. 3 is a sectional view of essential parts, and Figs. FIG. 6 to 8 show another embodiment, and FIG. 6 is a sectional view of a main part, FIG.
FIG. 8 is a front view of the main part. (1) …… Inner cylinder, (1a) …… First sliding contact surface, (2) ……
Outer cylinder, (2a) ... second sliding contact surface, (5) ... first cylinder,
(5b), (6b) ... Mating surface, (5c), (6c) ... Annular circumferential groove, (6) ... Second cylinder, (7) ... Key.

Claims (1)

[Scope of utility model registration request] 1. An inner cylinder (1) having a partially spherical first sliding contact surface (1a), and a partially spherical second sliding contact surface (1) slidingly contacting the first sliding contact surface (1a). An outer cylindrical body (2) having a second sliding contact surface (1a) and a second slidable contact surface (2a) fitted to each other. And the outer cylinder body (2) are connected to each other so that they cannot be pulled out and can swing relative to each other, and the outer cylinder body (2) is fitted around the first sliding contact surface (1a) along the circumferential direction. The first cylinder body (5) and the second cylinder body (6) are divided and configured, and the first cylinder body (5) and the second cylinder body (6) are the first cylinder body (5). Arc-shaped key (7) fitted over both of the annular circumferential grooves (5c), (6c) formed on each of the fitting surfaces (5b), (6b) between the second cylindrical body (6) and the second cylindrical body (6) The key (7) is connected via the Groove (5c), (6
In the universal pipe joint which is elastically deformed and fitted in both of c), the key (7) is elastically deformed in the radial direction by the elastic deformation force of the key (7) itself, and the ring A universal pipe joint characterized in that it is fitted over both circumferential grooves (5c), (6c).