CN205919035U - Oil tank oil gallery sealing mechanism - Google Patents

Abstract

The utility model discloses a sealing mechanism for an oil return hole of an oil tank. It includes an oil tank with an oil return hole and an oil return pipe on the oil tank, and a sealing mechanism between the oil return pipe and the oil return hole. It is characterized in that the sealing mechanism includes a base, and the lower end of the base extends into the oil return hole. There is a sealing body on the base, and the inner cavity diameter of the sealing body matches the outer diameter of the oil return pipe. There is a radial boss with a polygonal cross section on the outer circle in the longitudinal middle of the sealing body, and the section of the sealing body below the radial boss extends into the base. There is an upper conical gap between the upper end of the sealing body and the oil return pipe, and a tapered sleeve is arranged in the conical gap. There is a locking cover above the tapered sleeve. The top center of the locking cover has a through hole matching the outer diameter of the oil return pipe. The inner diameter of the locking cover is the same as the outer circle of the sealing body above the radial boss. Correspondingly, the inner circle of the locking cover and the radial boss are screwed together in a sealed shape. With this sealing mechanism, rainwater or dirt cannot easily enter the oil return tank, which can prevent the oil in the oil tank from being polluted.

Description

Oil tank oil return hole sealing mechanism

technical field

The utility model relates to a sealing mechanism. Specifically, it is a sealing mechanism used to seal between the oil return hole on the top plate of the fuel tank and the oil return pipe.

Background technique

At present, the seal between the oil return hole and the oil return pipe on the top plate of the fuel tank is realized by a rubber ferrule, as shown in Figure 1. Although the seal between the oil return hole and the oil return pipe can be realized by using the rubber ferrule, because the rubber ferrule is made of rubber, it is easy to age over time, and the elasticity will fail, thus losing the sealing effect, making it easy for rainwater or dirt to leak. Enter the oil return tank, causing pollution to the oil in the oil return tank.

Utility model content

The problem to be solved by the utility model is to provide a sealing mechanism for the oil return hole of the fuel tank. With this sealing mechanism, rainwater or dirt cannot easily enter the oil return tank, which can prevent the oil in the oil tank from being polluted.

The above-mentioned problem to be solved by the utility model is realized by the following technical solutions:

The oil tank oil return hole sealing mechanism of the utility model comprises an oil tank, an oil return hole is arranged on the top plate of the oil tank, an oil return pipe is arranged in the oil return hole, and a sealing mechanism is arranged between the oil return pipe and the oil return hole. It is characterized in that the sealing mechanism includes a base, the base is in the shape of a circular tube, the lower end of which extends into the oil return hole, and the two are welded together in a sealed shape. There is a sealing body on the base, and the sealing body is tubular, and the inner diameter of the sealing body matches the outer diameter of the oil return pipe. On the longitudinal middle outer circle of the sealing body, there is a radial boss with a polygonal cross-section that is convenient for matching with a wrench. The section of the sealing body below the radial boss extends into the base and the two are in a sealing fit. Between the upper end of the sealing body and the oil return pipe, there is a conical gap with a large upper part and a smaller lower part. In the conical gap, there is a conical sleeve with a large upper part and a smaller outer circle. The length of the conical sleeve is longer than that of the conical gap. There is a locking cover above the tapered sleeve. The top center of the locking cover has a through hole matching the outer diameter of the oil return pipe. The inner diameter of the locking cover is the same as the outer circle of the sealing body above the radial boss. Correspondingly, there are threads on the inner circle of the lock cover and the outer circle of the sealing body above the radial boss, and the two are screwed together in a sealed shape.

A further improvement of the utility model is that the outer circle of the seal under the radial boss is conical and has external threads, the inner circle of the base is conical and has internal threads, and the radial boss The lower part of the sealing body is screwed into the inner circle of the base by means of the external thread and the internal thread.

A further improvement of the utility model is that there is a compression block between the tapered sleeve and the cover top of the lock cover, and there is a central hole on the compression block that is adapted to the oil return pipe, and there is a downward convex edge around the central hole. The outer surface of the protruding edge is a conical shape with a large top and a small bottom; the inner edge of the upper end of the tapered sleeve has a chamfer, and the downward protruding flange extends into the chamfer.

A further improvement of the utility model is that the inner surface of the cover top of the locking cover is a tapered surface with a small top and a large bottom.

It can be seen from the above scheme that since the sealing body under the radial boss protrudes into the base and the two are in a sealing fit. Between the upper end of the sealing body and the oil return pipe, there is a conical gap with a large upper part and a smaller lower part. In the conical gap, there is a conical sleeve with a large upper part and a smaller outer circle. The length of the conical sleeve is longer than that of the conical gap. There is a locking cover above the tapered sleeve. The top center of the locking cover has a through hole matching the outer diameter of the oil return pipe. The inner diameter of the locking cover is the same as the outer circle of the sealing body above the radial boss. Correspondingly, there are threads on the inner circle of the lock cover and the outer circle of the sealing body above the radial boss, and the two are screwed together in a sealed shape. By tightening the locking cover, the lower end of the tapered sleeve can be wedged into the conical gap, so that there is no gap between the outer circle of the return pipe and the sealing body, so that rainwater or dirt is not easy to enter the fuel tank, and the oil in the tank is avoided. Bring pollution.

And because the outer circle of the seal under the radial boss is conical and has external threads, the inner circle of the base is conical with a large top and bottom and has internal threads, the sealing body under the radial boss It is screwed into the inner circle of the base by means of the external thread and the internal thread. By screwing the sealing body, the section of the sealing body under the radial boss and the inner circle of the base can be made closer and closer. In this way, rainwater or dirt can be further eliminated from entering the fuel tank, so as to avoid polluting the oil in the fuel tank.

In addition, since there is a compression block between the tapered sleeve and the top of the lock cover, the compression block has a central hole adapted to the oil return pipe, and there is a downward extension around the central hole. The side surface is conical with a large top and a small bottom; the inner edge of the upper end of the tapered sleeve has a chamfer, and the downward extending convex edge extends into the chamfer. By tightening the locking cover, the lower end of the downward extension flange can be wedged into the chamfer, so that there is no gap between the outer circle of the return pipe and the sealing body, thereby further eliminating rainwater or dirt from entering the fuel tank and avoiding oil in the tank Bring pollution.

Description of drawings

Fig. 1 is a schematic diagram of the oil tank oil return hole sealing mechanism of the utility model.

detailed description

As shown in Figure 1, the fuel tank oil return hole sealing mechanism of the present utility model includes a fuel tank, and an oil return hole is processed on the top plate 7 of the fuel tank. There is a sealing mechanism. The sealing mechanism includes a base 6, the base 6 is in the shape of a circular tube, the lower end of which extends into the oil return hole and the two are welded together in a sealed shape. A sealing body 5 is arranged on the base 6 , and the sealing body 5 is tubular, and its inner cavity diameter matches the outer diameter of the oil return pipe 1 . The longitudinal middle outer circle of the sealing body 5 is processed with a radial boss 51 with a polygonal cross-section that is convenient for matching with a wrench, and the section of the sealing body 5 below the radial boss 51 is processed with external threads, and the base 6 Internal threads are processed on the inner surface, and the section of sealing body 5 below the radial boss 51 is screwed into the base 6 by means of external and internal threads to make the two seal fit. The upper end of the sealing body 5 and the oil return pipe 1 are provided with a conical gap with a large top and a small bottom, and a conical sleeve 4 with a large top and a small bottom is installed in the conical gap. The length of the conical sleeve 4 is Larger than the conical gap, the inner circle of the sealing body 5 and the outer wall of the oil return pipe 1 are tightly fitted through the conical sleeve 4 . A locking cover 2 is arranged above the tapered sleeve 4, and the center of the cover top of the locking cover 2 is processed with a through hole matching the outer diameter of the oil return pipe 1. The outer circle of the section of the sealing body 5 on the locking cover 2 and the outer circle of the section of the sealing body 5 above the radial boss 51 are all processed with threads, and the two are formed by means of threads. Twist together airtight.

In order to further improve the sealing effect, a compression block 3 is arranged between the tapered sleeve 4 and the cover top of the lock cover 2, and a central hole matching the oil return pipe 1 is processed on the compression block 3, and the center hole is processed with lower Extending the convex edge, the outer surface of the downward extending convex edge is a conical shape with a large upper part and a smaller lower part. The inner edge of the upper end of the tapered sleeve 4 is processed with a chamfer, and the downwardly extending convex edge extends into the chamfer.

In order to further improve the sealing effect, the inner surface of the cover top of the locking cover 2 is a tapered surface processed into a small top and a large bottom.

When in use, by tightening the locking cover 2, the lower end of the tapered sleeve 4 can be wedged into the conical gap, so that there is no gap between the outer circle of the oil return pipe 1 and the sealing body 5, so that rainwater or dirt is not easy to enter the fuel tank, avoiding Contaminate the oil in the tank.

Claims (4)

1. The sealing mechanism of the oil return hole of the oil tank includes the oil tank. There is an oil return hole on the top plate (7) of the oil tank. There is an oil return pipe (1) in the oil return hole, and there is a sealing mechanism between the oil return pipe (1) and the oil return hole; It is characterized in that the sealing mechanism includes a base (6), the base is in the shape of a round tube, the lower end of which extends into the oil return hole and the two are welded together in a sealed shape; there is a sealing body (5) on the base (6), so The sealing body (5) is tubular, and its inner cavity diameter matches the outer diameter of the oil return pipe; on the longitudinal middle outer circle of the sealing body (5), there is a radial boss (51 ), the sealing body (5) under the radial boss (51) extends into the base (6) and the two are in a tight fit; the upper end of the sealing body (5) and the oil return pipe have upper, lower Small conical gap, inside the conical gap there is a conical sleeve (4) with a large upper circle and a smaller outer circle, the length of the conical sleeve is greater than the conical gap; there is a locking cover (2) above the conical sleeve , the top center of the locking cover (2) has a through hole matching the outer diameter of the oil return pipe (1), and the inner diameter of the locking cover (2) is sealed with the section above the radial boss (51) The outer circle of the sealing body (5) is suitable, and the outer circle of the sealing body (5) on the inner circle of the locking cover (2) and the radial boss (51) has threads on the outer circle, and there is a Twist together airtight. 2. The oil tank oil return hole sealing mechanism according to claim 1, characterized in that the outer circle of the sealing body (5) under the radial boss (51) is conical and has external threads, and the base (6) The inner circle is a conical shape with a large top and a small bottom and has an internal thread, and the sealing body (5) under the radial boss (51) is screwed into the inner circle of the base (6) by means of the external thread and internal thread Inside. 3. The oil tank oil return hole sealing mechanism according to claim 1 or 2, characterized in that there is a pressing block (3) between the tapered sleeve (4) and the top of the locking cover (2), and the pressing block ( 3) There is a central hole adapted to the oil return pipe (1), and there is a downwardly extending convex edge around the central hole, and the outer surface of the downwardly extending convex edge is a conical shape with a large upper part and a smaller lower part; the tapered sleeve (4) There is a chamfer on the inner edge of the upper end, and the lower extending convex edge extends into the chamfer. 4. The oil tank oil return hole sealing mechanism according to claim 3, characterized in that the inner surface of the cover top of the locking cover (2) is a tapered surface with a small top and a large bottom.