High-pressure pneumatic wrench male head

Abstract

The utility model discloses a male head of a high-pressure pneumatic hammer. According to the technical scheme, the male head comprises a male head body, an annular bead steel positioning groove is formed in the middle of the male head body, at least two sealing grooves arranged at intervals are formed in the front end of the male head body, an O-shaped ring and a check ring are arranged in each sealing groove, and the O-shaped rings are located in front of the check rings. The O-shaped sealing ring has the advantages that the O-shaped sealing ring is sealed through the combination of the O-shaped ring and the check ring, so that the O-shaped sealing ring can be prevented from being squeezed into a gap, the situation that the gap is bitten is avoided, and the sealing effect of the O-shaped sealing ring is enhanced. Besides, the check ring can protect the O-shaped sealing ring from being directly impacted by high-pressure oil, the stress of the O-shaped sealing ring is reduced, and the service life of the O-shaped sealing ring is prolonged. And the sealing performance and the service life are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the pneumatic field, and particularly relates to a pneumatic joint. Background Art

[0002] The male head of a high-pressure air impact wrench is a component of a quick connector for connecting air pipes, and is usually used in pneumatic tools such as air impact wrenches (also known as pneumatic impact wrenches) to provide high-pressure gas to drive the tool to work. One or two "O" - rings are usually arranged on the traditional male head of a high-pressure air impact wrench for sealing cooperation with the female head of the air impact wrench. Due to the very high air pressure of the high-pressure air impact wrench, the "O" - ring structure of the traditional male head of a high-pressure air impact wrench is very easy to leak air due to wear. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a male head of a high-pressure air impact wrench that is wear-resistant and not easy to leak air.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: a male head body, a circular bead steel positioning groove is arranged in the middle of the male head body, and it is characterized in that: at least two sealing grooves arranged at intervals are provided at the front end of the male head body, an "O" - ring and a retaining ring are arranged in each sealing groove, and the "O" - ring is located in front of the retaining ring.

[0005] The male head of the high-pressure air impact wrench is characterized in that: the end face of the retaining ring is flush with the end face of the male head body, and the end face of the "O" - ring is slightly higher than the end face of the male head body.

[0006] The male head of the high-pressure air impact wrench is characterized in that: a gap is left between the retaining ring and the "O" - ring.

[0007] The male head of the high-pressure air impact wrench is characterized in that: the end face of the "O" - ring is 1 - 2 mm higher than the end face of the male head body.

[0008] The male head of the high-pressure air impact wrench is characterized in that: the width W of the gap is 1 - 2 mm.

[0009] The male head of the high-pressure air impact wrench is characterized in that: a nut and an external thread are integrally formed at the rear end of the male head body.

[0010] The male head of the high-pressure air impact wrench is characterized in that: the retaining ring is a tetrafluoroethylene retaining ring.

[0011] The advantages of the male head of the high-pressure air gun of the present utility model are as follows: Sealing is carried out through the combination of an "O" - ring and a retaining ring, which can prevent the "O" - ring from being squeezed into the gap, avoiding the occurrence of gap biting, thereby enhancing the sealing effect of the "O" - ring. In addition, the use of the retaining ring can also protect the "O" - ring from the direct impact of high - pressure oil, reducing the stress of the "O" - ring and extending its service life. Furthermore, it significantly improves the sealing performance and service life.

[0012] The following further describes the present utility model with reference to the accompanying drawings of the specification. Brief Description of the Drawings

[0013] Figure 1 is a cross - sectional view of the male head of the high - pressure air gun of the present utility model;

[0014] Figure 2 is an exploded view of the male head of the high - pressure air gun of the present utility model. Detailed Description of the Preferred Embodiments

[0015] Referring to Figure 1-2 as shown, the male head of the high - pressure air gun of the present utility model includes a male head body 1, and an annular bead steel positioning groove 2 is provided in the middle of the male head body 1. Two sealing grooves 3 arranged at intervals are provided at the front end of the male head body 1. An "O" - ring 4 and a retaining ring 5 are provided in each sealing groove 3, and the "O" - ring 4 is located in front of the retaining ring 5.

[0016] Preferably, the end face of the retaining ring 5 is flush with the end face of the male head body 1, and the end face of the "O" - ring 4 is slightly higher than the end face of the male head body 1. Ideally, the end face of the "O" - ring 4 is 1 - 2 mm higher than the end face of the male head body 1. A gap 6 is left between the retaining ring 5 and the "O" - ring 4. Ideally, the width W of the gap 6 is 1 - 2 mm. Due to the accommodation of the gap 6, it is possible to avoid the aggravation of surface wear caused by excessive compression of the "O" - ring 4, thereby further improving the service life.

[0017] Preferably, a nut 7 and an external thread 8 are integrally formed at the rear end of the male head body 1. By installing a locking nut on the external thread 8 and then tightening through the nut 7, it is convenient to connect more firmly with the air pipe.

[0018] Preferably, the retaining ring 5 is a tetrafluoro (polytetrafluoroethylene) retaining ring. The tetrafluoro retaining ring has characteristics such as high working accuracy, excellent chemical resistance, no hardening or breakage, a wide service temperature range, small friction, and no water absorption.

[0019] The above does not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, within the scope of the technical solution of the present utility model, can make some changes or modifications to the above-disclosed structure and technical content to form equivalent embodiments of equivalent changes. However, as long as the content does not depart from the technical solution of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A male head of a high-pressure air gun, comprising a male head body (1), wherein a ring-shaped bead steel positioning groove (2) is provided in the middle of the male head body (1), and it is characterized in that: At least two sealing grooves (3) arranged at intervals are provided at the front end of the male head body (1), and an "O" - ring (4) and a retaining ring (5) are arranged in each sealing groove (3), and the "O" - ring (4) is located in front of the retaining ring (5).

2. The male head of the high-pressure air cannon according to claim 1, wherein: The end face of the retaining ring (5) is flush with the end face of the male head body (1), and the end face of the "O" - ring (4) is slightly higher than the end face of the male head body (1).

3. The male head of the high-pressure air gun according to claim 2, characterized in that: A gap (6) is left between the retaining ring (5) and the "O" - ring (4).

4. The male head of the high-pressure air gun according to claim 2, characterized in that: The end face of the "O" - ring (4) is 1 - 2 mm higher than the end face of the male head body (1).

5. The male head of the high-pressure air gun according to claim 3, characterized in that: The width W of the gap (6) is 1 - 2 mm.

6. The male head of the high-pressure air gun according to claim 1, characterized in that: A nut (7) and an external thread (8) are integrally formed at the rear end of the male head body (1).

7. The male head of the high-pressure air gun according to claim 1, wherein: The retaining ring (5) is a PTFE retaining ring.

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