Quick pneumatic connector

Abstract

The utility model discloses a quick pneumatic connector which is more labor-saving in male plug-in connection. According to the technical scheme, the valve comprises a valve body, a steel ball seat connected to the rear end of the valve body in a threaded mode, a lock sleeve arranged on the outer wall of the valve body in a sleeving mode, a valve element sleeve and a valve element, the valve element sleeve and the valve element are arranged in the valve body, a set of steel balls arranged circumferentially are arranged on the steel ball seat, a first reset spring is arranged in the lock sleeve, and a step matched with the steel balls is arranged at the rear end of the lock sleeve. The valve element is sleeved with a second reset spring, the valve element sleeve comprises a mounting flange, a front boss extending into the valve body and a rear boss extending into the steel ball seat, the valve element comprises a horn-shaped inserting opening and an air inlet pipe, the front end of the air inlet pipe is inserted into the center of the valve element sleeve, and the rear end of the air inlet pipe is inserted into the mounting flange. A first O-shaped ring matched with the inner wall of the valve body in a sealing mode is arranged on the outer wall of the front boss.

Description

Technical Field

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

[0002] A pneumatic joint is a quick joint widely used in pneumatic tools. Its structure includes: a valve body, a steel ball seat screwed to the rear end of the valve body, a lock sleeve sleeved on the outer wall of the valve body, and a valve core sleeve and a valve core arranged in the valve body. A group of steel balls arranged in a circle are provided on the steel ball seat. A first return spring is arranged in the lock sleeve, and a step cooperating with the steel balls is arranged at the rear end. A second return spring is sleeved on the valve core. An "O" - ring is arranged on the outer wall of the valve core to be hermetically matched with the inner wall of the valve core sleeve. The disadvantages of traditional pneumatic joints are: due to the limitations of the structures of the valve core sleeve and the valve core, the outer diameter of the valve core is usually relatively thick, resulting in a large resistance when the valve core slides, and thus making it more laborious to insert the male head. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a quick pneumatic joint with more labor - saving male - head insertion.

[0004] To solve the above problems, the technical solutions adopted by the utility model include: a valve body, a steel ball seat screwed to the rear end of the valve body, a lock sleeve sleeved on the outer wall of the valve body, and a valve core sleeve and a valve core arranged in the valve body. A group of steel balls arranged in a circle are provided on the steel ball seat. A first return spring is arranged in the lock sleeve, and a step cooperating with the steel balls is arranged at the rear end. A second return spring is sleeved on the valve core. The valve core sleeve includes an installation flange, a front boss extending into the valve body, and a rear boss extending into the steel ball seat. The valve core includes a flared insertion port and an air inlet pipe. The front end of the air inlet pipe is inserted into the center of the valve core sleeve. A first "O" - ring for hermetically matching with the inner wall of the valve body is arranged on the outer wall of the front boss. A second "O" - ring for hermetically matching with the outer wall of the air inlet pipe is arranged on the inner wall of the rear boss. A third "O" - ring for hermetically matching with the end face of the front boss is arranged on the top of the air inlet pipe.

[0005] The quick pneumatic joint is characterized in that: a sealing gasket and a fourth "O" - ring are sequentially arranged in the flared insertion port.

[0006] The quick pneumatic joint is characterized in that: two second "O" - rings for hermetically matching with the outer wall of the air inlet pipe are arranged on the inner wall of the rear boss.

[0007] The quick pneumatic joint is characterized in that: a first air pipe joint and a first locking nut are arranged at the front end of the valve body.

[0008] The quick pneumatic joint is characterized in that: it further includes a male head inserted and matched with the valve core.

[0009] The described quick pneumatic connector is characterized in that: a second air pipe connector and a second locking nut are provided at the rear end of the male head.

[0010] The described quick pneumatic connector is characterized in that: the outer diameter of the rear boss does not exceed 2 / 3 of the outer diameter of the rear boss.

[0011] The advantages of the quick pneumatic connector of the present utility model are as follows: By improving the structures of the valve core sleeve and the valve core, and arranging an "O" - ring on the inner wall of the rear boss of the valve core sleeve, the outer diameter of the valve core can be made thinner, thereby reducing friction and making the insertion of the male head more labor - saving.

[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 quick pneumatic connector of the present utility model;

[0014] Figure 2 is a structural schematic diagram of the valve core sleeve of the present utility model.

[0015] Figure 3 is a structural schematic diagram of the valve core of the present utility model. Detailed Embodiment

[0016] Refer to Figures 1-3As shown in the figure, the quick pneumatic joint of the present utility model includes a valve body 1, a steel ball seat 2 screwed to the rear end of the valve body 1, a lock sleeve 3 sleeved on the outer wall of the valve body 1, and a valve core sleeve 5 and a valve core 6 arranged in the valve body 1. A group of steel balls 7 arranged in a circle are provided on the steel ball seat 2. A first return spring 8 is arranged in the lock sleeve 3 for resetting the lock sleeve 3. A step 9 cooperating with the steel ball 7 is arranged at the rear end of the lock sleeve 3. When the boss of the step 9 cooperates with the steel ball 7, it plays a role of locking; when the groove of the step 9 cooperates with the steel ball 7, it plays a role of unlocking. A second return spring 10 is sleeved on the valve core 6 for resetting the valve core 6. The valve core sleeve 5 includes a mounting flange 11, a front boss 12 extending into the valve body 1, and a rear boss 13 extending into the steel ball seat 2. After assembly, the mounting flange 11 is in positioning fit with the inner cavity flange of the valve body 1. At the same time, after the steel ball seat 2 is tightened, the front end presses on the mounting flange 11 to fix it. The valve core 6 includes a flared socket 14 and an air inlet pipe 15. The front end of the air inlet pipe 15 is inserted into the center of the valve core sleeve 5, and an air inlet hole 4 communicated with the air inlet pipe 15 is arranged on the insertion. A first "O" - ring 16 for sealing cooperation with the inner wall of the valve body 1 is arranged on the outer wall of the front boss 12 through a sealing groove. A second "O" - ring 17 for sealing cooperation with the outer wall of the air inlet pipe 15 is arranged on the inner wall of the rear boss 13 through a sealing groove. A third "O" - ring 18 for sealing cooperation with the end face of the front boss 12 is arranged on the top of the air inlet pipe 15 through a sealing groove. When the male head 23 is inserted into the valve core 6, the valve core 6 is pushed forward, and further the air inlet hole 4 of the air inlet pipe 15 is away from the valve core sleeve 5 to realize a passage; when the male head 23 is pulled out, under the action of the second return spring 10, the valve core 6 resets, and the air inlet hole 4 enters the valve core sleeve 5 to realize a closed circuit.

[0017] Preferably, a sealing gasket 19 and a fourth "O" - ring 20 are sequentially arranged in the flared socket 14. Through the combination of the two sealing elements, the sealing ability with the male head 23 can be greatly improved.

[0018] Preferably, two second "O" - rings 17 for sealing cooperation with the outer wall of the air inlet pipe 15 are arranged on the inner wall of the rear boss 13 to further improve the sealing performance.

[0019] Preferably, a first air pipe joint 21 and a first locking nut 22 are arranged at the front end of the valve body 1. The first air pipe joint 21 is used to connect an air pipe, and the first locking nut 22 is used to lock the air pipe.

[0020] Preferably, it further includes a male head 23 in plug - in fit with the valve core 6. A second air pipe joint 24 and a second locking nut 25 are arranged at the rear end of the male head 23. The second air pipe joint 24 is used to connect an air pipe, and the second locking nut 25 is used to lock the air pipe.

[0021] Preferably, the outer diameter of the rear boss 13 does not exceed 2 / 3 of the outer diameter of the rear boss 13, and ideally the outer diameter of the rear boss 13 is 1 / 2 of the outer diameter of the rear boss 13 to achieve the best ventilation and labor-saving effects.

[0022] 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, without departing from the technical solution of the present utility model, may 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 quick pneumatic connector, comprising a valve body (1), a steel ball seat (2) screwed to the rear end of the valve body (1), a locking sleeve (3) sleeved on the outer wall of the valve body (1), and a valve core sleeve (5) and a valve core (6) arranged in the valve body (1), wherein a group of circumferentially arranged steel balls (7) are arranged on the steel ball seat (2), a first return spring (8) is arranged in the locking sleeve (3), and a step (9) cooperating with the steel ball (7) is arranged at the rear end, and a second return spring (10) is sleeved on the valve core (6), characterized in that: The valve core sleeve (5) comprises a mounting flange (11), a front boss (12) extending into the valve body (1) and a rear boss (13) extending into the steel ball seat (2); the valve core (6) comprises a trumpet-shaped plug-in interface (14) and an air inlet pipe (15); the front end of the air inlet pipe (15) is inserted into the center of the valve core sleeve (5); the outer wall of the front boss (12) is provided with a first "O" ring (16) which is sealed with the inner wall of the valve body (1); the inner wall of the rear boss (13) is provided with a second "O" ring (17) which is sealed with the outer wall of the air inlet pipe (15); and the top of the air inlet pipe (15) is provided with a third "O" ring (18) which is sealed with the end face of the front boss (12).

2. The quick pneumatic connector according to claim 1, characterized in that: A sealing gasket (19) and a fourth "O" ring (20) are arranged in sequence in the trumpet-shaped plug-in port (14).

3. The quick pneumatic connector according to claim 1, characterized in that: The inner wall of the rear boss (13) is provided with two second O-rings (17) which are sealably matched with the outer wall of the air intake pipe (15).

4. The quick pneumatic connector according to claim 1, characterized in that: The front end of the valve body (1) is provided with a first air pipe joint (21) and a first locking nut (22).

5. The quick pneumatic connector according to claim 1, characterized in that: It also includes a male head (23) that is plug-fitted with the valve core (6).

6. The quick pneumatic connector according to claim 5, characterized in that: A second air pipe joint (24) and a second locking nut (25) are provided at the rear end of the male head (23).

7. The quick pneumatic connector according to claim 1, characterized in that: The outer diameter of the rear boss (13) does not exceed 2 / 3 of the outer diameter of the rear boss (13).

Images