Pneumatic quick plug connector

Abstract

The utility model belongs to the technical field of quick-plug connectors, and particularly relates to a pneumatic quick-plug connector which comprises a hollow connector body, an annular reed, a lining and a quick-connection button, the annular reed, the lining and the quick-connection button are sequentially arranged in the connector body, the quick-connection button is arranged on the connector body in a reciprocating motion mode, and the bottom end of the quick-connection button abuts against the annular reed. The bushing is arranged in the mounting through hole, the bottom of the bushing abuts against the outer edge of the annular reed, and in the process that the quick connection button is bounced to the highest point by the annular reed, the outer wall, close to the movable groove, of the lower end of the quick connection button can abut against the inner wall of the lower end of the bushing, so that the bushing is expanded to the maximum extent, and clamping between the outer clamping ring and the fixing groove is firmer; the outer diameter of the annular reed is smaller than the inner diameter of the connector body, the annular reed does not need to be extruded, installation of the annular reed is facilitated, deformation of the annular reed cannot be caused, assembly efficiency is improved, meanwhile, the service life of a product is greatly prolonged, and the pressure-resistant range of the product is greatly widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of quick-plug connectors, in particular to a pneumatic quick-plug connector. Background Art

[0002] Pneumatic quick-connect connectors are a very convenient plug-and-play connection method for connecting pipes. They are widely used in pneumatic and other automation fields. Existing quick-connect connectors generally clamp the hose through an annular spring. When the annular spring is installed, the quick-connect connector needs to have an installation groove inside. Quick-connect connectors are generally divided into plastic and metal materials. After the annular spring inside the plastic quick-connect connector is installed, it is easy to fall off once the internal pressure is too high or it is used for too long. The internal installation groove of the metal quick-connect connector is not only difficult to process, but the annular spring needs to be squeezed during installation, which can easily cause the annular spring to deform, affecting the service life of the quick-connect connector. In addition, there is a certain proportion of defective products in the production process. A pneumatic quick-connect connector is now provided to solve the above problems. Utility Model Content

[0003] 1. Technical Problems to be Solved

[0004] The utility model is aimed at the above-mentioned defects in the prior art and specially proposes a pneumatic quick-plug connector. The outer diameter of the annular spring is smaller than the inner diameter of the connector body, which facilitates the installation of the annular spring without squeezing the annular spring and does not cause deformation of the annular spring. The inner and outer diameters of the bushing cooperate with the connector body and the movable joint to make the entire quick-plug connector more stable, thereby solving the above-mentioned problems.

[0005] 2. Technical Solution

[0006] To solve the above technical problems, the present invention provides a pneumatic quick-connect connector comprising a hollow connector body, an annular spring, a bushing, and a quick-connect button sequentially arranged in the connector body, the quick-connect button being reciprocatably arranged on the connector body, the bottom end of the quick-connect button abutting against the annular spring, and when the quick-connect button is pressed, the inner diameter of the annular spring can be enlarged;

[0007] One end of the joint body is provided with a mounting through hole and a fixing boss. The outer diameter of the annular spring is slightly smaller than the inner diameter of the mounting through hole but larger than the inner diameter of the upper end of the fixing boss. When installing, the annular spring can be directly placed on the fixing boss through the mounting through hole.

[0008] The bushing is arranged in the mounting through hole and the bottom of the bushing abuts against the outer edge of the annular spring. An inner retaining ring and an outer retaining ring are respectively provided at or near the upper end of the bushing, extending radially inward and outward. The inner wall cross-section of the lower end of the bushing is trapezoidal or approximately trapezoidal, and the inner diameter decreases as it approaches the upper end of the bushing.

[0009] A fixed groove is provided on the inner wall of the mounting hole, which can be engaged with the outer snap ring and used to fix the bushing; a movable groove is provided on the outer wall of the quick-connect button, which can be engaged with the inner snap ring, and the inner snap ring is used to limit the reciprocating stroke of the quick-connect button;

[0010] When the quick-connect button is bounced to the highest point by the annular spring, the outer wall of the lower end of the quick-connect button close to the movable groove can abut against the inner wall of the lower end of the bushing, so that the bushing is stretched to the maximum extent, thereby making the clamping of the outer clamping ring and the fixed groove more secure.

[0011] The annular spring comprises a fixed ring, a plurality of first tooth-shaped spring pieces extend from the center of the fixed ring toward the inside, and a plurality of second tooth-shaped spring pieces extend from the center of the fixed ring toward the outside.

[0012] The top of the fixing ring abuts against the bottom end of the bushing, the top of the first toothed spring piece abuts against the bottom end of the quick-connect button, and the bottom of the second toothed spring piece abuts against the top of the fixing boss.

[0013] Among them, when the quick-connect button is pressed, the bottom end of the quick-connect button applies pressure to the first toothed spring sheet, and the first toothed spring sheet will undergo elastic deformation, causing its inner diameter to expand, thereby allowing the insertion end of the pipe fitting to pass through the annular spring sheet. When the quick-connect button is released, the first toothed spring sheet rebounds, causing its inner diameter to shrink and clamp the pipe fitting.

[0014] The side of the bushing is also provided with an opening along the axial direction, which enables the radial dimensions of various parts of the bushing to vary within a certain range;

[0015] When the opening is closed or nearly closed in a compressed state, the outer diameter of the outer clamping ring is smaller than the inner diameter of the mounting hole; when the opening is in a non-compressed state, the opening is separated, and the outer diameter of the outer clamping ring is larger than the inner diameter of the mounting hole and can be engaged with the fixing groove.

[0016] Among them, a base for contacting the insertion end of the pipe fitting is also provided inside the joint body, a sealing groove is provided between the base and the fixed boss, and a sealing ring is installed inside the sealing groove.

[0017] Among them, the connector body, quick-connect button, annular spring and bushing are all made of metal.

[0018] 3. Beneficial Effects

[0019] Compared with the prior art, the pneumatic quick-plug connector of the present invention has an outer diameter of the annular spring that is smaller than the inner diameter of the connector body, which facilitates the installation of the annular spring without squeezing the annular spring and does not cause deformation of the annular spring. The inner and outer diameters of the bushing cooperate with the connector body and the movable joint, making the entire quick-plug connector more stable, greatly improving the service life and pressure resistance range of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a pneumatic quick-connect connector.

[0021] Figure 2 This is a three-dimensional structural exploded view of a pneumatic quick-connect connector.

[0022] Figure 3 A cross-sectional view of a pneumatic quick-connect connector.

[0023] Figure 4 The figure is a schematic diagram of the three-dimensional structure of an annular spring of a pneumatic quick-connect connector.

[0024] Figure 5 The figure is a schematic diagram of the three-dimensional structure of a bushing of a pneumatic quick-connect connector.

[0025] Figure 6 A cross-sectional view of a bushing for a pneumatic quick-connect connector.

[0026] In the picture:

[0027] 1 is the connector body; 11 is the fixing groove; 12 is the installation through hole;

[0028] 2 is a quick-connect button; 21 is a movable slot;

[0029] 3 is a fixed boss;

[0030] 4 is an annular spring; 41 is a fixing ring; 42 is a first toothed spring; 43 is a second toothed spring

[0031] shrapnel;

[0032] 5 is a bushing; 51 is an outer snap ring; 52 is an inner snap ring; 53 is an opening;

[0033] 6 is a base; 7 is a sealing groove. DETAILED DESCRIPTION

[0034] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] Combine Figure 1 、 Figure 2 and Figure 3As shown, the quick-connect connector of this embodiment includes a connector body 1, an annular spring 4, a bushing 5 and a quick-connect button 2 arranged in sequence inside the connector body 1. The quick-connect button 2 is arranged on the connector body 1 for reciprocating movement. The bottom end of the quick-connect button 2 abuts against the annular spring 4. When the quick-connect button 2 is pressed, the inner diameter of the annular spring 4 can be enlarged. A mounting through hole and a fixing boss 3 are provided at one end of the connector body 1. The outer diameter of the annular spring 4 is slightly smaller than the inner diameter of the mounting through hole but larger than the inner diameter of the upper end of the fixing boss 3. When installing, the annular spring 4 can be directly placed on the fixing boss 3 through the mounting through hole, effectively improving the assembly efficiency of the product.

[0036] The bushing 5 is arranged in the mounting hole and the bottom of the bushing 5 abuts against the outer edge of the annular spring 4. The upper end or near the upper end of the bushing 5 is respectively provided with an inner snap ring 52 and an outer snap ring 51 extending radially inward and outward; the cross-section of the inner wall of the lower end of the bushing 5 is trapezoidal or approximately trapezoidal, and the inner diameter becomes smaller as it approaches the upper end of the bushing 5; a fixing groove is provided on the inner wall of the mounting hole, which can be snap-fitted with the outer snap ring 51 and used to fix the bushing 5; the outer wall of the quick-connect button 2 is provided with a movable groove 21, which can be snap-fitted with the inner snap ring 52 is snap-fitted, and the inner snap ring 52 is used to limit the reciprocating motion of the quick-connect button 2. Specifically, the length of the movable groove 21 determines the stroke length of the quick-connect button 2, and also determines the lowest point of pressing the quick-connect button 2 and the highest point of bouncing off. In the process of the quick-connect button 2 being bounced to the highest point by the annular spring 4, the outer wall of the lower end of the quick-connect button 2 close to the movable groove 21 can abut against the inner wall of the lower end of the bushing 5, so that the bushing 5 is stretched to the maximum extent, thereby making the outer snap ring 51 and the fixed groove more firmly connected.

[0037] Specifically, pneumatic quick-connect fittings are designed to achieve fast, secure, and reliable pipe connections. A fixed boss 3 is located inside the fitting body 1, serving as a support platform for the annular spring 4. Made of a highly elastic material, the annular spring 4 exhibits excellent deformation recovery and fatigue resistance. A bushing 5 guides and limits the quick-connect button 2, while the mounting hole also serves as a guide, ensuring smooth movement of the button 2 up and down within the fitting. The bottom end of the quick-connect button 2 abuts against the annular spring 4. Pressing the button inward compresses the annular spring 4, expanding its inner diameter. This allows the insertion of a pipe, enabling quick clamping. In practice, the user simply presses the quick-connect button 2. As the button descends, the annular spring 4 compresses its inner diameter, simultaneously ensuring close contact between the base 6 and the pipe insertion end. Releasing the button 2 allows the spring force of the annular spring 4 to securely clamp the pipe within the fitting body 1, achieving a quick and secure connection. The entire connection process does not require any tools and is easy and quick to operate.

[0038] The annular spring 4 includes a fixed ring 41, and a plurality of first tooth-shaped spring pieces 42 extend from the center of the fixed ring 41 to the inner side, and a plurality of second tooth-shaped spring pieces 43 extend from the center of the fixed ring 41 to the outer side. Figure 2 、 Figure 3 and Figure 4 As shown, the top of the fixing ring 41 abuts against the bottom of the bushing 5, the top of the first toothed spring 42 abuts against the bottom of the quick-connect button 2, and the bottom of the second toothed spring 43 abuts against the top of the fixing boss 3. When the quick-connect button 2 is pressed, the bottom of the quick-connect button 2 applies pressure to the first toothed spring 42, which elastically deforms, causing its inner diameter to expand, thereby allowing the insertion end of the pipe to pass through the annular spring 4 and contact the base 6. When the quick-connect button 2 is released, the first toothed spring 42 rebounds, causing its inner diameter to shrink and clamp the pipe. The top of the fixing ring 41 or a position near the top abuts against the bottom of the bushing 5, ensuring that the annular spring 4 can stably transmit force when subjected to external force and preventing the annular spring 4 from shifting or misaligning. The first toothed spring 42 extends inward from the center of the fixing ring 41, forming a series of sharp and elastic tooth structures. The tops of these first toothed springs 42 directly abut the bottom of the quick-connect button 2. When the quick-connect button 2 is subjected to inward pressure, the first toothed springs 42 elastically deform and expand, allowing the pipe to easily pass through the annular spring 4 and smoothly reach the base 6. At the same time, due to the serrated design of the first toothed springs 42, they can quickly rebound when the quick-connect button 2 is released, tightly clamping the pipe and ensuring a secure and leak-tight connection. Corresponding to the first toothed springs 42, the second toothed springs 43 extend outward from the center of the fixing ring 41, primarily providing additional support and stability. The bottom of the second toothed spring 43 abuts the top of the fixing boss 3, not only strengthening the connection between the annular spring 4 and the fixing boss 3, but also allowing the annular spring 4 to maintain a stable position when subjected to external forces. Furthermore, the serrated structure of the second toothed springs 43 can also disperse the pressure from the quick-connect button 2 to a certain extent, extending the service life of the annular spring 4.

[0039] An inner snap ring 52 and an outer snap ring 51 extending radially inward and outward are respectively provided at or near the upper end of the bushing 5, and an opening along the axial direction is also provided on the side of the bushing 5. The opening can make the radial dimensions of various parts of the bushing 5 vary within a certain range; when the opening is closed or nearly closed in a compressed state, the outer diameter of the outer snap ring 51 is smaller than the inner diameter of the mounting through hole; when the opening is in a non-compressed state, the opening is separated, and the outer diameter of the outer snap ring 51 is larger than the inner diameter of the mounting through hole and can be engaged with the fixing groove 11. The axial length of the fixing groove 11 is equal to or slightly larger than the axial length of the outer snap ring 51. Figure 1 and Figure 5As shown, regarding the installation of the bushing 5 into the mounting hole to fix the annular spring 4, when in the compressed state, the opening 53 is closed, and at this time the outer diameter of the outer retaining ring 51 is smaller than the inner diameter of the mounting hole; when in the non-compressed state, due to the structural characteristics of the bushing 5 itself having a certain elasticity, and the opening 53 is small in size, the opening 53 is reset and separated, and at this time the outer diameter of the outer retaining ring 51 is larger than the inner diameter of the mounting hole and is engaged with the fixing groove 11 to be fixed, but if it only relies on the bushing 5 to reset itself, it cannot be completely reset, and there will be a certain gap with the design size after installation, which will cause the outer retaining ring 51 to be not fully engaged with the fixing groove 11, thereby affecting the service life of the product. A corresponding design is made based on this problem, that is, the cross-section of the inner wall of the lower end of the bushing 5 is designed to be trapezoidal or approximately trapezoidal, and the closer to the upper end of the bushing 5, the smaller the inner diameter is. When the quick-connect button 2 bounces up under the elastic force of the annular spring 4, the outer wall of the lower end of the quick-connect button 2 close to the movable groove can abut against the inner wall of the lower end of the bushing 5, and can achieve the effect of stretching the bushing 5 outward to a certain extent. At this time, the outer retaining ring 51 can better and effectively hook with the fixed groove 11, thereby preventing unhooking and ensuring the firmness of the installation of the bushing 5. Even if used in a high-pressure environment, the pipe fittings in the joint will not fall out.

[0040] Combine Figure 1 、 Figure 2 and Figure 3 As shown, a sealing groove 7 is provided between the base 6 and the fixed boss 3, and a sealing ring is installed within the sealing groove 7. Specifically, as the component of the quick-connect connector that directly contacts the pipe, the base 6 must not only be stable but also provide good sealing performance. The connector body 1, quick-connect button 2, annular spring 4, and bushing 5 are all made of metal. The metal bushing also has high hardness and strength, capable of withstanding the compressive forces from the pipe and quick-connect button 2, ensuring the sealing and stability of the connector.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pneumatic quick-connect connector, characterized in that: The pneumatic quick-connect connector comprises a hollow connector body (1), an annular spring (4), a bushing (5) and a quick-connect button (2) arranged in sequence in the connector body (1); the quick-connect button (2) is arranged on the connector body (1) so as to be reciprocatingly movable; the bottom end of the quick-connect button (2) abuts against the annular spring (4); when the quick-connect button (2) is pressed, the inner diameter of the annular spring (4) is increased; One end of the joint body (1) is provided with a mounting through hole (12) and a fixing boss (3); the outer diameter of the annular spring (4) is slightly smaller than the inner diameter of the mounting through hole (12) but larger than the inner diameter of the upper end of the fixing boss (3); the annular spring (4) can be directly placed on the fixing boss (3) through the mounting through hole (12) during installation; The bushing (5) is arranged in the mounting through hole (12) and the bottom of the bushing (5) abuts against the outer edge of the annular spring (4); an inner snap ring (52) and an outer snap ring (51) extending radially inward and outward are respectively provided at or near the upper end of the bushing (5); the inner wall cross section of the lower end of the bushing (5) is trapezoidal or approximately trapezoidal, and the inner diameter decreases as it approaches the upper end of the bushing (5); The inner wall of the mounting through hole (12) is provided with a fixing groove (11), which can be engaged with an outer snap ring (51) and used to fix the bushing (5); the outer wall of the quick-connect button (2) is provided with a movable groove (21), which can be engaged with an inner snap ring (52), and the inner snap ring (52) is used to limit the reciprocating stroke of the quick-connect button (2); When the quick-connect button (2) is bounced up to the highest point by the annular spring (4), the outer wall of the lower end of the quick-connect button (2) close to the movable groove (21) can abut against the inner wall of the lower end of the bushing (5), so that the bushing (5) is stretched to the maximum extent, thereby making the clamping connection between the outer clamping ring (51) and the fixed groove (11) more secure.

2. A pneumatic quick-connect connector according to claim 1, characterized in that: The annular spring (4) comprises a fixing ring (41), wherein the fixing ring (41) has a plurality of first tooth-shaped spring pieces (42) extending from the center of the circle toward the inside, and the fixing ring (41) has a plurality of second tooth-shaped spring pieces (43) extending from the center of the circle toward the outside.

3. A pneumatic quick-connect connector according to claim 2, characterized in that: The top of the fixing ring (41) abuts against the bottom of the bushing (5), the top of the first toothed spring piece (42) abuts against the bottom of the quick-connect button (2), and the bottom of the second toothed spring piece (43) abuts against the top of the fixing boss (3).

4. A pneumatic quick-connect connector according to claim 3, characterized in that: When the quick-connect button (2) is pressed, the bottom end of the quick-connect button (2) applies pressure to the first toothed spring piece (42), and the first toothed spring piece (42) undergoes elastic deformation, causing its inner diameter to expand, thereby allowing the insertion end of the pipe to pass through the annular spring piece (4); when the quick-connect button (2) is released, the first toothed spring piece (42) rebounds, causing its inner diameter to shrink and clamp the pipe.

5. The pneumatic quick-connect connector according to claim 4, characterized in that: The side of the bushing (5) is also provided with an opening (53) along the axial direction, and the opening (53) can make the radial dimensions of various parts of the bushing (5) vary within a certain range; When the opening (53) is closed or nearly closed in a compressed state, the outer diameter of the outer snap ring (51) is smaller than the inner diameter of the mounting through hole (12); when the opening (53) is in a non-compressed state, the opening (53) is separated, and the outer diameter of the outer snap ring (51) is larger than the inner diameter of the mounting through hole (12) and can be engaged with the fixing groove (11).

6. The pneumatic quick-connect connector according to claim 1, characterized in that: A base (6) for contacting the insertion end of the pipe is also provided inside the joint body (1), a sealing groove (7) is provided between the base (6) and the fixed boss (3), and a sealing ring is installed inside the sealing groove (7).

7. The pneumatic quick-connect connector according to claim 1, characterized in that: The connector body (1), the quick-connect button (2), the annular spring (4) and the bushing (5) are all made of metal.

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