Leak-proof pneumatic joint with built-in rotary seal

Abstract

The application discloses a kind of built-in rotary seal's anti-leakage pneumatic joint, including joint body, and the left and right sides of joint body are connected with pneumatic pipe;It also includes: the inner wall of the joint body is rotatably connected with worm wheel ring, and the middle part of worm wheel ring is fixed with sealing ring;The inside of the joint body is connected with threaded ring symmetrically;Rubber ring is fixed on the inner wall of the threaded ring;The left and right sides of the joint body are symmetrically fixed with fixed sliding bracket, and anti-escape toothed plate is slidably connected on fixed sliding bracket, and anti-escape toothed plate is staggered and in contact with the outside of pneumatic pipe.This built-in rotary seal's anti-leakage pneumatic joint, through sealing ring can be sealed to the end of pneumatic pipe, and rubber ring after rotating movement can be tightly sealed to the side of pneumatic pipe, sealing treatment is carried out from different directions, and the connected pneumatic pipe can be prevented from falling off and reinforced, improve the connection sealing performance of pneumatic joint as a whole, avoid leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic connectors, in particular to a leak-proof pneumatic connector with built-in rotary sealing element. BACKGROUND

[0002] A pneumatic connector is a quick connector mainly used for air piping and pneumatic tools, which can realize pipeline connection or disconnection without tools, and is used to provide compressed air from the air source to the pneumatic tool for use, which can be applied to air piping, air compressor, grinder, air drill, impact wrench, air screwdriver and other pneumatic tools;

[0003] In the pneumatic connector disclosed in CN212745398U, a second convex edge is arranged in the second through hole, an upper connector is connected to the second through hole, and a sealing ring is arranged between the second convex edge and the upper connector. The sealing ring is fixed by being squeezed by the second convex edge and the upper connector, and a skeleton is additionally arranged in the sealing ring to greatly improve the strength of the sealing ring. When the airflow passes through, the skeleton arranged in the sealing ring keeps the original shape of the sealing ring and is not easy to deform, and the air tightness is strong;

[0004] In the leak-proof pneumatic connector disclosed in CN218564689U, one end of the air pipe is gradually inserted into the pneumatic connector through the buckle and the slot. During this process, the air pipe gradually moves towards the inside of the sealing ring through the clasp. During this process, the sealing ring is deformed and expanded outwardly under the push of the air pipe. As the sealing ring continuously expands, the elastic band inside the annular groove is gradually stretched. The elastic band can increase the toughness of the sealing ring and prevent the sealing ring from being deformed and damaged under the expansion of the air pipe. After the air pipe is inserted into the pneumatic connector, the deformed sealing ring tightly fits the inner side wall of the pipe groove. When the airflow flows in the air pipe, the gas will press the sealing ring to make it further tightly fit the inner side wall of the pipe groove. Through the above operation, the sealing ring can well fix the air pipe and make it stably set in the sealing pipe, avoiding the air pipe from falling off during the airflow flow process and achieving good air leakage prevention effect.

[0005] However, the above-mentioned scheme has the following problems in use: when connected, the pneumatic pipe and the pneumatic connector are connected in a plug-in manner, and then sealed by the internal sealing ring. During this process, the position of the sealing ring is fixed and the sealing direction is single, which limits the sealing effect. In addition, the pneumatic pipe only has the force in the plug-in direction when connected, and there is no other auxiliary fixing mechanism. When an external force is applied, the joint is easy to loosen, which may also cause leakage.

[0006] Therefore, we propose a leak-proof pneumatic connector with built-in rotary sealing element to solve the problems mentioned above. SUMMARY

[0007] The present application aims to provide a built-in rotary seal anti-leakage pneumatic connector to solve the above background art, the current market existing pneumatic connector, when connecting, the pneumatic tube and the pneumatic connector adopt the plug-in connection mode, and then the sealing treatment is carried out through the internal sealing ring, in this process, the position of the sealing ring is fixed, the sealing direction is single, and the sealing effect is limited, and when the pneumatic tube is connected, only the force in the plug-in direction acts, and there is no other auxiliary fixing mechanism, when there is an external force, the joint is easy to loosen, thereby causing the leakage phenomenon.

[0008] To achieve the above object, the present application provides the following technical scheme: a built-in rotary seal anti-leakage pneumatic connector, comprising a connector body, and the left and right sides of the connector body are connected with pneumatic tubes;

[0009] Further comprising: the inner wall of the connector body is rotatably connected with a worm gear ring, and the middle part of the worm gear ring is fixed with a sealing ring, and the left and right sides of the sealing ring abut against the end of the pneumatic tube;

[0010] The inside of the connector body is symmetrically connected with a threaded ring, and the threaded ring is located inside the worm gear ring, and the outside of the threaded ring is connected with an internal thread, and the internal thread is arranged on the inner wall of the worm gear ring;

[0011] The inner wall of the threaded ring is fixed with a rubber ring, and the rubber ring is in sealing contact with the outside of the pneumatic tube;

[0012] The left and right sides of the connector body are symmetrically fixed with fixed carriages, and the fixed carriages are slidably connected with anti-disengagement teeth plates, and the anti-disengagement teeth plates abut against the outside of the pneumatic tube in a staggered manner.

[0013] Preferably, the middle part of the front side of the connector body is connected with a rotating rod, and the rotating rod is connected with a latch, and a spring is arranged between the rotating rod and the latch, and the end of the latch is connected with a clamping groove, and the clamping groove is arranged on the front side of the connector body, so that when the latch is pulled, the spring is compressed, and then the latch is separated from the clamping groove, thereby rotating the rotating rod.

[0014] Preferably, the rear side of the rotating rod is integrally connected with a worm, and the worm is bearing-connected in the inner wall of the top of the connector body, and the bottom of the worm is connected with the worm gear ring, and the outside of the worm gear ring is symmetrically installed with rollers, and the rollers are slidingly connected in the inner wall of the connector body, so that when the rotating rod rotates, the worm rotates synchronously, when the worm rotates, the worm gear ring rotates, and when the worm gear ring rotates, the rollers rotate synchronously.

[0015] Preferably, the inner wall of the worm gear ring is symmetrically provided with two sections of reverse internal threads, the internal threads drive the threaded ring to slide, the end of the threaded ring penetrates and is connected to the limiting rod in a sliding mode, and the limiting rod is symmetrically fixed to the inner wall of the left and right ends of the joint body, so that the worm gear ring rotates to drive the threaded ring to move through the internal threads, and the threaded ring slides on the limiting rod.

[0016] Preferably, the outer side end of the rubber ring on the inner wall of the threaded ring is provided in a beveled structure, and the rubber ring is in sealing abutment with the outer side of the pneumatic pipe, so that the threaded ring moves to drive the rubber ring to move synchronously.

[0017] Preferably, the middle part of the worm gear ring is fixed with a sealing ring, the outer side of the sealing ring is provided with an inner recessed step and a sealing step in a stepped manner, the inner recessed step and the sealing step are both provided in an "L" shaped structure, the inner recessed step is used for providing a storage space for the threaded ring and the rubber ring, and the sealing step is in abutment with the end of the pneumatic pipe, so that the sealing step on the sealing ring is used for sealing the end of the pneumatic pipe, and the inner recessed step provides a setting space for the reset of the threaded ring.

[0018] Preferably, the left and right sides of the worm gear ring are both symmetrically fixed with a pull rope, the end of the pull rope is connected with a gear, the gear is symmetrically connected to the left and right ends of the joint body in a bearing mode, and a torsional spring is installed between the gear and the joint body, so that the worm gear ring rotates to relax or pull the pull rope, and the torsional spring drives the gear to rotate.

[0019] Preferably, the gear constitutes a reciprocating rotating structure through the pull rope and the torsional spring, and the outer side of the gear is engaged with a anti-falling tooth plate, so that the gear rotates to drive the anti-falling tooth plate to slide open and close.

[0020] Preferably, the anti-falling tooth plate constitutes an opening and closing sliding structure through the gear, the anti-falling tooth plate constitutes a stable sliding structure through a fixed sliding frame, and the pneumatic pipe constitutes a locking anti-falling mechanism through the anti-falling tooth plate, so that the anti-falling tooth plate slides to abut against the outer side of the pneumatic pipe in a staggered mode.

[0021] Compared with the prior art, the beneficial effects of the anti-leakage pneumatic joint with a built-in rotating sealing element are as follows: in use, the sealing ring in the middle part can seal the end of the pneumatic pipe, the rubber ring after rotating and moving can press and seal the side of the pneumatic pipe, so that sealing treatment can be performed from different directions, and the connected pneumatic pipe is also prevented from falling off, the overall connection and sealing performance of the pneumatic joint is improved, and leakage is avoided.

[0022] 1. After connecting the pneumatic tube and the connector, the end of the pneumatic tube will abut against the "L"-shaped sealing step on the sealing ring, thereby sealing the port of the pneumatic tube and forming the first sealing barrier. Then, pull the pin on the rotating rod, which will compress the spring and separate it from the slot in the initial position. Then rotate the rotating rod, which will drive the worm gear to rotate. After the worm gear rotates, it will drive the worm wheel ring to rotate. After the worm wheel ring rotates, it will drive the threaded ring to move through the internal thread. The threaded tube slides on the limiting rod, which will cause the threaded ring to move outward and squeeze and seal against the side of the pneumatic tube. Through the double sealing treatment of transverse and longitudinal directions, a better sealing effect is achieved.

[0023] 2. When the worm gear ring rotates, it will loosen the pull rope. After the pull rope is loosened, the torsion spring, which is initially in a reverse state, will rotate. After the torsion spring rotates, it will drive the gear to rotate synchronously. After the gear rotates, it will drive the tooth plate to move relative to each other, and then it will abut against the outer end of the pneumatic tube, thereby limiting and fixing the pneumatic tube to prevent it from loosening due to external force. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall front view of the present invention;

[0026] Figure 3 This is a side sectional view of the rotating rod, pin, and slot of the present invention;

[0027] Figure 4 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point B;

[0029] Figure 6 This is a schematic diagram of the orthographic structure of the threaded ring and rubber ring of the present invention;

[0030] Figure 7 This is a schematic diagram of the orthographic structure of the worm gear ring and sealing ring of the present invention;

[0031] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point C.

[0032] In the figure: 1, joint body; 2, pneumatic pipe; 3, rotating rod; 4, bolt; 5, spring; 6, clamping groove; 7, worm; 8, worm ring; 9, roller; 10, sealing ring; 11, inner concave step; 12, sealing step; 13, internal thread; 14, threaded ring; 15, rubber ring; 16, pull rope; 17, gear; 18, torsional spring; 19, anti-disengagement tooth plate; 20, fixed slide; 21, limiting rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Please refer to Figures 1-8 , the present application provides a technical solution: a leak-proof pneumatic joint with built-in rotary sealing element, comprising a joint body 1, and the left and right sides of the joint body 1 are connected with pneumatic pipes 2, as Figure 1 shown, in use, the pneumatic pipes 2 are respectively connected with the left and right sides of the joint body 1;

[0035] The middle part of the front side of the joint body 1 is connected with a rotating rod 3, and the rotating rod 3 is connected with a bolt 4, and a spring 5 is installed between the bolt 4 and the rotating rod 3, and the end of the bolt 4 is connected with a clamping groove 6, and the clamping groove 6 is opened on the front side of the joint body 1, and the rear side of the rotating rod 3 is integrally connected with a worm 7, and the worm 7 is bearing connected in the inner wall of the top of the joint body 1, and the bottom of the worm 7 is connected with a worm ring 8, and the outer side of the worm ring 8 is symmetrically installed with rollers 9, and the rollers 9 are slidingly connected in the inner wall of the joint body 1, as Figures 1-5 shown, after the end of the pneumatic pipe 2 enters the inside of the joint body 1, pull the bolt 4 on the front side of the joint body 1, the bolt 4 is pulled and the spring 5 is compressed, and then the clamping groove 6 in the initial position is separated, and then the rotating rod 3 is rotated, the rotating rod 3 is rotated and the worm 7 is synchronously rotated, the worm 7 is rotated and the worm ring 8 is rotated, the worm ring 8 is rotated and the rollers 9 are synchronously rotated in the inner wall of the joint body 1, and in the later fixing stage, the bolt 4 is loosened, the spring 5 drives the clamping groove 6 in the corresponding position to be clamped, and then the adjusted state is fixed;

[0036] The inner wall of the joint body 1 is rotationally connected with a worm gear ring 8, the middle part of the worm gear ring 8 is fixed with a sealing ring 10, the left and right sides of the sealing ring 10 abut against the end of the pneumatic pipe 2, the middle part of the worm gear ring 8 is fixed with the sealing ring 10, the outer side of the sealing ring 10 is stepped and provided with an inner recess step 11 and a sealing step 12, the inner recess step 11 and the sealing step 12 are both provided with an "L" shaped structure, the inner recess step 11 is used for providing a storage space for the threaded ring 14 and the rubber ring 15, and the sealing step 12 abuts against the end of the pneumatic pipe 2, as shown in Figure 1 and Figure 7 The end of the pneumatic pipe 2 abuts against the sealing ring 10 in the worm gear ring 8, and then abuts against the sealing step 12 on the sealing ring 10, the sealing step 12 seals the horizontal direction of the pneumatic pipe 2, and the worm gear ring 8 rotates to make the threaded ring 14 and the rubber ring 15 slide out of the inner recess step 11 outside the sealing ring 10 and move to both sides;

[0037] The inside of the joint body 1 is symmetrically connected with the threaded ring 14, the threaded ring 14 is located inside the worm gear ring 8, the outer side of the threaded ring 14 is connected with the internal thread 13, the internal thread 13 is arranged on the inner wall of the worm gear ring 8, the inner wall of the threaded ring 14 is fixed with the rubber ring 15, the rubber ring 15 is in sealing contact with the outer side of the pneumatic pipe 2, the inner wall of the worm gear ring 8 is symmetrically provided with two sections of reverse internal threads 13, the internal threads 13 drive the threaded ring 14 to slide, the end of the threaded ring 14 penetrates and is connected to the limiting rod 21, the limiting rod 21 is symmetrically fixed to the inner walls of the left and right ends of the joint body 1, the outer end of the rubber ring 15 on the inner wall of the threaded ring 14 is provided with a beveled structure, and the rubber ring 15 is in pressure sealing contact with the outer side of the pneumatic pipe 2, as shown in Figure 1 and Figures 4-6 The worm gear ring 8 rotates to drive the threaded ring 14 to slide on the limiting rod 21, and then move from the middle part to both sides, the threaded ring 14 drives the rubber ring 15 to move synchronously, the bevel of the rubber ring 15 first contacts the outer side of the pneumatic pipe 2, and then continues to move and press against the outer side of the pneumatic pipe 2, thereby sealing the vertical direction of the pneumatic pipe 2, so that the sealing between the joint body 1 and the pneumatic pipe 2 is more comprehensive, and the leakage phenomenon is prevented;

[0038] The left and right sides of the joint body 1 are symmetrically fixed with fixed carriages 20, and the fixed carriages 20 are slidably connected with anti-off teeth plates 19, and the anti-off teeth plates 19 are in staggered abutment with the outer side of the pneumatic pipe 2, the left and right sides of the worm ring 8 are symmetrically fixed with pull ropes 16, and the end of the pull rope 16 is connected with the gear 17, and the gear 17 is symmetrically bearing connected on the left and right side ends of the joint body 1, and the torsional spring 18 is installed between the gear 17 and the joint body 1, the gear 17 forms a reciprocating rotating structure through the pull rope 16 and the torsional spring 18, and the outer side of the gear 17 is meshingly connected with the anti-off teeth plate 19, the anti-off teeth plate 19 forms an opening and closing sliding structure through the gear 17, and the anti-off teeth plate 19 forms a stable sliding structure through the fixed carriage 20, and the pneumatic pipe 2 forms a locking anti-off mechanism through the anti-off teeth plate 19, as shown in Figures 1-2 and Figure 8 When the worm ring 8 rotates, the pull rope 16 is loosened, at this time, the initially reversed torsional spring 18 rotates, the torsional spring 18 rotates to drive the gear 17 to rotate synchronously, the gear 17 rotates to drive the anti-off teeth plate 19 to move relatively on the fixed carriage 20, the anti-off teeth plate 19 moves to be in staggered abutment with the outer side of the pneumatic pipe 2, so as to prevent the pneumatic pipe 2 and the joint body 1 from being loosened.

[0039] Working principle: when the anti-leakage pneumatic joint with the built-in rotary sealing element is used, as shown in Figures 1-8 first, the pneumatic pipe 2 is connected with the two sides of the joint body 1 respectively, the rotating rod 3 drives the worm 7 to rotate, the worm 7 drives the worm ring 8 to rotate, the end of the pneumatic pipe 2 is in abutment with the sealing step 12 on the sealing ring 10, the sealing step 12 seals the horizontal direction of the pneumatic pipe 2, and the worm ring 8 rotates to make the threaded ring 14 and the rubber ring 15 slide out of the inner recessed step 11 outside the sealing ring 10 and move to both sides;

[0040] The worm ring 8 rotates to drive the threaded ring 14 to slide on the limiting rod 21 through the internal thread 13, the threaded ring 14 drives the rubber ring 15 to move, the rubber ring 15 is in abutment with the outer side of the pneumatic pipe 2, so as to seal the vertical direction of the pneumatic pipe 2, so that the sealing between the joint body 1 and the pneumatic pipe 2 is more comprehensive, and the leakage is prevented;

[0041] When the worm ring 8 rotates, the pull rope 16 is loosened, the reversed torsional spring 18 rotates, the torsional spring 18 drives the gear 17 to rotate, the gear 17 drives the anti-off teeth plate 19 to move relatively, the anti-off teeth plate 19 moves to be in staggered abutment with the outer side of the pneumatic pipe 2, so as to prevent the pneumatic pipe 2 and the joint body 1 from being loosened, thereby completing a series of work.

[0042] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0043] In the description of the present application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A leak-proof pneumatic joint with built-in rotary seal, comprising a joint body (1), and pneumatic pipes (2) connected to the left and right sides of the joint body (1); characterized in that Further comprising: A worm gear ring (8) is rotatably connected to the inner wall of the joint body (1), and a sealing ring (10) is fixed to the middle part of the worm gear ring (8), and the left and right sides of the sealing ring (10) abut against the end of the pneumatic pipe (2); A threaded ring (14) is symmetrically connected to the inside of the joint body (1), and the threaded ring (14) is located inside the worm gear ring (8), and the outside of the threaded ring (14) is connected with the internal thread (13), and the internal thread (13) is arranged on the inner wall of the worm gear ring (8); A rubber ring (15) is fixed to the inner wall of the threaded ring (14), and the rubber ring (15) is in sealing contact with the outside of the pneumatic pipe (2); Fixed carriages (20) are symmetrically fixed to the left and right sides of the joint body (1), and anti-disengagement teeth plates (19) are slidably connected to the fixed carriages (20), and the anti-disengagement teeth plates (19) abut against the outside of the pneumatic pipe (2) in a staggered manner; Pulling ropes (16) are symmetrically fixed to the left and right sides of the worm gear ring (8), and the ends of the pulling ropes (16) are connected with gears (17), and the gears (17) are symmetrically bearing-connected to the left and right end parts of the joint body (1), and torsional springs (18) are installed between the gears (17) and the joint body (1); The gear (17) constitutes a reciprocating rotation structure through the pulling rope (16) and the torsional spring (18), and the outside of the gear (17) is meshingly connected with the anti-disengagement teeth plate (19).

2. A leak-tight pneumatic coupling with built-in rotary seal according to claim 1, characterized in that: A rotating rod (3) is connected through the middle part of the front side of the joint body (1), and a bolt (4) is connected through the rotating rod (3), and a spring (5) is installed between the bolt (4) and the rotating rod (3), and the end of the bolt (4) is connected with a clamping groove (6), and the clamping groove (6) is arranged on the front side of the joint body (1).

3. A leak-tight pneumatic coupling with a built-in rotary seal according to claim 2, characterized in that: A worm (7) is integrally connected to the rear side of the rotating rod (3), and the worm (7) is bearing-connected to the inner wall of the top of the joint body (1), and the bottom of the worm (7) is connected with the worm gear ring (8), and the outside of the worm gear ring (8) is symmetrically installed with rollers (9), and the rollers (9) are slidingly connected in the inner wall of the joint body (1).

4. A leak-tight pneumatic coupling with built-in rotary seal as claimed in claim 1 wherein: Two sections of reverse internal threads (13) are symmetrically arranged on the inner wall of the worm gear ring (8), the internal threads (13) drive the threaded ring (14) to slide, the end of the threaded ring (14) is connected through and slides on a limiting rod (21), and the limiting rod (21) is symmetrically fixed to the inner walls of the left and right ends of the joint body (1).

5. A leak-tight pneumatic coupling with built-in rotary seal as claimed in claim 1 wherein: The outer end of the rubber ring (15) on the inner wall of the threaded ring (14) is provided in a beveled structure, and the rubber ring (15) abuts against and seals against the outside of the pneumatic pipe (2).

6. A leak-tight pneumatic coupling with built-in rotary seal as claimed in claim 1 wherein: The middle part of the worm wheel ring (8) is fixed with a sealing ring (10), the outer side of the sealing ring (10) is provided with a concave step (11) and a sealing step (12) in a stepped manner, the concave step (11) and the sealing step (12) are both provided as "L" shaped structures, the concave step (11) is used for providing storage space for a threaded ring (14) and a rubber ring (15), and the sealing step (12) is in abutment with the end of the pneumatic pipe (2).

7. A leak-tight pneumatic coupling with built-in rotary seal as claimed in claim 1 wherein: The anti-falling tooth plate (19) is formed as an opening and closing sliding structure through the gear (17), the anti-falling tooth plate (19) is formed as a stable sliding structure through a fixed sliding frame (20), and the pneumatic pipe (2) is formed as a locking anti-falling mechanism through the anti-falling tooth plate (19).

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