A rotary quick coupling

Abstract

The utility model provides a kind of rotary quick coupling, it is related to mechanical component technical field, coupling main body, the coupling main body includes relatively rotatable trachea connecting component and equipment connecting component;The trachea connecting component is provided with assembly hole, and the equipment connecting component includes connecting end and the shaft sleeve of being set in the outer of connecting end, and the shaft sleeve is rotatably urged fixed in the assembly hole;Ball assembly is arranged between the outer wall of connecting end and the inner wall of shaft sleeve, to make the connecting end with the shaft sleeve form rolling friction connection by ball assembly.The utility model has the beneficial effect that, by the cooperation of shaft sleeve and ball assembly, the trachea connecting component and equipment connecting component in coupling main body can be relatively rotated with low friction and high flexibility, effectively prevent trachea from twisting, realize the quick plug and firm locking of trachea, with the advantages of compact structure, reliable connection, good sealing, flexible rotation and easy operation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical components technology, and in particular to a rotary quick coupling. Background Technology

[0002] In industrial production, laboratory equipment, and many pneumatic applications, it is often necessary to continuously transport gaseous media through pipelines, while simultaneously requiring the equipment components connected to the pipelines to rotate relative to each other. This requirement is widespread in scenarios such as rotary cylinders, rotary tables in machining centers, winding equipment, and end effectors of robotic arms. If fixed pipeline connections are used, the delivery pipeline is highly susceptible to twisting, tangling, or even breakage during equipment rotation, which not only affects the continuous and stable operation of the equipment but also poses safety hazards. To solve these problems, rotary joints have emerged. A rotary joint is a key basic component that can provide a dynamic sealing connection between a fixed pipeline and a rotating component, ensuring continuous and stable transmission of the medium. It can withstand a certain medium pressure while achieving a reliable seal between the rotating and stationary components, ensuring flexible rotation and a long service life.

[0003] Existing technologies disclose the structure of rotary joints. For example, Chinese utility model patent CN221402124U discloses a rotary joint for gas pipelines, which enables rotational connection to reduce the problem of line entanglement. The specific structure includes an adapter that mates with a threaded pipe, and an outer shell consisting of two half-shells at the connection point. The outer shell uses an internally designed limiting ring to axially limit the adapter, and simultaneously uses a stop post to circumferentially limit the threaded pipe, thereby allowing the adapter and the threaded pipe to rotate relative to each other within the shell.

[0004] While the aforementioned structure achieves anti-winding functionality to some extent, it still suffers from certain technical drawbacks: the rotation function primarily relies on direct sliding friction between the outer wall of the adapter and threaded tube and the limiting rings and stoppers on the inner wall of the outer shell. During long-term, frequent rotational movements, this hard-contact friction generates significant frictional resistance and heat, not only producing abnormal frictional noise and polluting the acoustic environment, but also accelerating wear on the contact points. Whether it's the adapter, the surface of the threaded tube, or the inner wall of the plastic outer shell, continuous wear leads to increased clearance, potentially generating dust or debris that contaminates the gaseous medium, severely impacting the service life and operational reliability of the connector.

[0005] In other words, existing technology needs improvement, and there is an urgent need to disclose a new type of rotary quick coupling to overcome the above-mentioned technical defects. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a rotary quick connector with the advantages of compact structure, reliable connection, good sealing, flexible rotation, and easy operation.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A rotary quick coupling, comprising: The connector body includes a rotatable air tube connection component and a device connection component; The tracheal connection component is provided with an assembly hole, and the equipment connection component includes a connection end and a bushing sleeved outside the connection end. The bushing sleeve is rotatably and tightly fixed in the assembly hole. A ball bearing assembly is provided between the outer wall of the connecting end and the inner wall of the bushing, so that the connecting end and the bushing form a rolling friction connection through the ball bearing assembly; The end of the trachea connecting component away from the device connecting component is detachably connected to a trachea mounting kit. The trachea mounting kit is provided with a plurality of circumferentially distributed elastic pressure claws, which together form a clamping hole for clamping the trachea. When the trachea mounting kit is installed on the trachea connecting component, the inner wall of the trachea connecting component radially presses the elastic pressure claws to lock the trachea inserted into the clamping hole through the elastic pressure claws.

[0008] Furthermore, the ball assembly includes two sets of balls. The outer wall of the connecting end is provided with an annular groove for mounting the balls, and the inner wall of the bushing is provided with an annular limiting shoulder that protrudes radially inward. The two sets of balls are respectively located on both sides of the annular limiting shoulder, and the radial inner end face of the annular limiting shoulder is lower than the radial outermost point of the balls. The annular groove and the annular limiting shoulder cooperate to restrict the bushing from axially disengaging from the connecting end.

[0009] Furthermore, the tracheal connection component is also provided with a sealing and clamping assembly, which includes an end face sealing ring and a spring; One end face of the end face sealing ring abuts against the end of the connecting end, and the other end face is connected to one end of the spring. The other end of the spring abuts against the inner wall of the air pipe connecting component, so that the end face sealing ring is pressed against the connecting end by the elastic force of the spring.

[0010] Furthermore, the end face sealing ring has a stepped hole on the end face facing the spring, and one end of the spring is positioned and installed in the stepped hole.

[0011] Furthermore, it also includes a positioning pin. The end face sealing ring is provided with a first pin hole, and the air pipe connecting component is provided with a second pin hole. The positioning pin passes through both the first pin hole and the second pin hole to restrict the rotation of the end face sealing ring relative to the air pipe connecting component.

[0012] Furthermore, the outer peripheral wall of the end face sealing ring is provided with an annular sealing groove, and a first sealing ring is installed in the annular sealing groove to seal the gap between the end face sealing ring and the inner wall of the air pipe connection component.

[0013] Furthermore, a second sealing ring is provided on the outer wall of the connecting end.

[0014] Furthermore, the inner wall of the elastic pressure claw is provided with a radially inwardly protruding structure to enhance the clamping force on the trachea.

[0015] Furthermore, the inner wall of the trachea connecting component is also provided with a third sealing ring, which is located below the trachea mounting kit and is used to seal the gap between the outer wall of the trachea and the inner wall of the trachea connecting component.

[0016] Furthermore, the top of the tracheal installation kit is provided with an outwardly folded retaining edge. When the tracheal installation kit is installed on the tracheal connection component, the retaining edge engages with the end of the tracheal connection component to limit the tracheal installation kit from being over-embedded.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This utility model of a rotary quick connector enables low-friction, high-flexibility relative rotation of the air tube connection component and the equipment connection component in the connector body through the cooperation of the bushing and the ball assembly, and also effectively prevents air tube torsion. In addition, the sealing and clamping component and the first sealing ring ensure effective sealing and axial stability under dynamic rotation. Furthermore, the air tube installation kit with elastic clamping claws enables quick insertion and removal and secure locking of the air tube, and has the advantages of reliable connection, good sealing, flexible rotation and easy operation. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings: Figure 1 It is a 3D view of a rotary quick coupling; Figure 2 This is a front view of the rotary quick coupling; Figure 3 This is a cross-sectional view of a rotary quick coupling; Figure 4 yes Figure 3 A magnified view of circle A in the middle; Figure 5 This is a cross-sectional view of the tracheal tube installation kit; Figure 6 It is a 3D view of the tracheal tube installation kit; Figure 7 This is a structural diagram of the tracheal connection component; Figure 8 This is a schematic diagram showing the connection end separated from the bushing; Figure 9 This is a sectional view of the bushing; Figure 10 This is an exploded view of the equipment connection components.

[0019] In the diagram: 1. Air tube connection component; 101. Assembly hole; 102. Second pin hole; 2. Equipment connection component; 201. Connection end; 2011. Annular groove; 202. Bushing; 2021. Annular limiting shoulder; 3. Ball bearing assembly; 4. Air tube mounting kit; 401. Elastic pressure claw; 4011. Protruding structure; 402. Clamping edge; 5. End face sealing ring; 501. Stepped hole; 502. First pin hole; 503. Annular sealing groove; 6. Spring; 7. Positioning pin; 8. First sealing ring; 9. Second sealing ring; 10. Third sealing ring. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] like Figures 1 to 10 As shown, this utility model claims protection for a rotary quick connector, including a connector body, which includes a rotatable air tube connection component 1 and an equipment connection component 2. The air tube connection component 1 has an assembly hole 101 at one end, and the equipment connection component 2 includes a connection end 201 and a bushing 202 sleeved outside the connection end 201. The bushing 202 is tightly fixed within the assembly hole 101 by means of interference fit or other methods, thereby fixing the equipment connection component 2 and the air tube connection component 1.

[0022] To achieve smooth rotation, a ball bearing assembly 3 is provided between the outer wall of the connecting end 201 and the inner wall of the bushing 202. Specifically, the outer wall of the connecting end 201 is machined with an annular groove 2011 to accommodate the balls. The inner wall of the bushing 202 is formed with a radially inwardly protruding annular limiting shoulder 2021. In this embodiment, the balls are divided into two groups, respectively arranged on both sides of the annular limiting shoulder 2021, and combined with... Figure 4 and Figure 9As can be seen, the radial inner end face of the annular limiting shoulder 2021 is lower than the radial outermost point of the ball. The above structure makes the annular groove 2011 and the annular limiting shoulder 2021 cooperate with each other and work together to restrict the ball to a certain extent, which can ensure flexible rotation and effectively prevent the bushing 202 from axially separating from the connecting end 201.

[0023] Inside the tracheal connection component 1, a sealing and clamping assembly is also provided. This assembly includes an end-face sealing ring 5 and a spring 6. One end of the end-face sealing ring 5 directly abuts against the end of the connection end 201 of the device connection component 2, while the other end is connected to one end of the spring 6. The other end of the spring 6 abuts against the inner wall of the tracheal connection component 1. The continuous elastic force provided by the spring 6 is transmitted to the connection end 201 through the end-face sealing ring 5, which not only achieves end-face sealing and compensates for part of the axial clearance, but also... Figure 3 This design allows the ball bearings to be in a closed space, making them less prone to contamination.

[0024] A stepped hole 501 is provided on the end face of the end sealing ring 5 facing the spring 6. One end of the spring 6 can be stably positioned in the stepped hole 501, which is beneficial for positioning. To prevent the end sealing ring 5 from rotating with the connecting end 201 under airflow or vibration, a positioning pin 7 is also provided. The end sealing ring 5 has a first pin hole 502, and the air pipe connecting component 1 has a corresponding second pin hole 102. One end of the positioning pin 7 passes through the first pin hole 502, and the other end passes through the second pin hole 102, thereby fixing the end sealing ring 5 circumferentially.

[0025] An annular sealing groove 503 is formed on the outer peripheral wall of the end face sealing ring 5. A first sealing ring 8 is installed in the annular sealing groove 503 to seal the gap between the end face sealing ring 5 and the inner wall of the air tube connecting component 1. Secondly, a second sealing ring 9 is provided on the outer wall of the connecting end 201. The connecting end 201 has external threads for connection to external equipment. The second sealing ring 9 enhances the tightness between the connecting end 201 and the external equipment. Finally, a third sealing ring 10 is provided on the inner wall of the air tube connecting component 1, below the air tube installation kit 4. When the air tube is inserted, the sealing ring seals the gap between the outer wall of the air tube and the inner wall of the air tube connecting component 1.

[0026] At the end of the trachea connection component 1 furthest from the device connection component 2, a trachea installation kit 4 is detachably connected. The kit has several circumferentially evenly distributed elastic pressure claws 401, which naturally enclose to form a clamping hole. To enhance the clamping force, each elastic pressure claw 401 has a radially inwardly protruding protrusion 4011 on its inner wall. When installing the trachea, the trachea is first inserted into the clamping hole, and then the installation kit 4 with the trachea is inserted into the trachea connection component 1. At this time, the inner wall of the trachea connection component 1 will press these elastic pressure claws 401 radially from all sides, forcing the protrusion 4011 to tightly grip the outer wall of the trachea, achieving a quick and secure locking.

[0027] In addition, to prevent the tracheal installation kit 4 from being over-embedded, an outwardly folding retaining edge 402 is provided at the top of the tracheal installation kit 4. Figures 1 to 3 It can be seen that when the clip 402 is snapped into the end of the tracheal connection component 1, it is installed in place, avoiding the previous embedding.

[0028] This utility model of a rotary quick connector enables the air pipe connection component and the equipment connection component in the connector body to rotate relative to each other with low friction and high flexibility through the cooperation of the bushing 202 and the ball assembly 3, and also effectively prevents the air pipe from twisting. In addition, the sealing and pressing component and the first sealing ring 8 ensure effective sealing and axial stability under dynamic rotation. And through the air pipe installation kit 4 with elastic pressure claws 401, the quick insertion and removal and firm locking of the air pipe are realized. It has the advantages of reliable connection, good sealing, flexible rotation and simple operation.

[0029] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary quick coupling, characterized in that, include: The connector body includes a rotatable air pipe connection component (1) and an equipment connection component (2). The tracheal connection component (1) is provided with an assembly hole (101), and the equipment connection component (2) includes a connection end (201) and a bushing (202) sleeved outside the connection end (201). The bushing (202) is rotatably and tightly fixed in the assembly hole (101). A ball assembly (3) is provided between the outer wall of the connecting end (201) and the inner wall of the bushing (202) so that the connecting end (201) and the bushing (202) form a rolling friction connection through the ball assembly (3); The end of the tracheal connection component (1) away from the device connection component (2) is detachably connected to a tracheal installation kit (4). The tracheal installation kit (4) is provided with a plurality of circumferentially distributed elastic pressure claws (401). The plurality of elastic pressure claws (401) surround to form a clamping hole for clamping the tracheal tube. When the tracheal installation kit (4) is installed on the tracheal connection component (1), the inner wall of the tracheal connection component (1) radially presses the elastic pressure claws (401) to lock the tracheal tube inserted into the clamping hole through the elastic pressure claws (401).

2. The rotary quick coupling according to claim 1, characterized in that, The ball assembly (3) includes two sets of balls. The outer wall of the connecting end (201) is provided with an annular groove (2011) for installing the balls. The inner wall of the bushing (202) is provided with an annular limiting shoulder (2021) that protrudes radially inward. The two sets of balls are located on the axial sides of the annular limiting shoulder (2021), and the radial inner end face of the annular limiting shoulder (2021) is lower than the radial outermost point of the balls. The annular groove (2011) and the annular limiting shoulder (2021) cooperate to restrict the bushing (202) from axially disengaging from the connecting end (201).

3. The rotary quick coupling according to claim 2, characterized in that, The tracheal connection component (1) is also provided with a sealing and pressing assembly, which includes an end face sealing ring (5) and a spring (6). One end face of the end face sealing ring (5) abuts against the end of the connecting end (201), and the other end face is connected to one end of the spring (6). The other end of the spring (6) abuts against the inner wall of the air pipe connecting component (1) so that the end face sealing ring (5) presses the connecting end (201) by the elastic force of the spring (6).

4. The rotary quick coupling according to claim 3, characterized in that, The end face sealing ring (5) is provided with a stepped hole (501) on the end face facing the spring (6), and one end of the spring (6) is positioned and installed in the stepped hole (501).

5. The rotary quick coupling according to claim 3 or 4, characterized in that, It also includes a positioning pin (7), a first pin hole (502) is provided on the end face sealing ring (5), and a second pin hole (102) is provided on the air pipe connecting component (1). The positioning pin (7) passes through both the first pin hole (502) and the second pin hole (102) to restrict the end face sealing ring (5) from rotating relative to the air pipe connecting component (1).

6. The rotary quick coupling according to claim 5, characterized in that, The outer peripheral wall of the end face sealing ring (5) is provided with an annular sealing groove (503), and a first sealing ring (8) is installed in the annular sealing groove (503) to seal the gap between the end face sealing ring (5) and the inner wall of the air pipe connecting component (1).

7. The rotary quick coupling according to claim 5, characterized in that, The outer wall of the connecting end (201) is provided with a second sealing ring (9).

8. The rotary quick coupling according to claim 5, characterized in that, The inner wall of the elastic pressure claw (401) is provided with a radially inward protruding protrusion structure (4011) to enhance the clamping force on the trachea.

9. The rotary quick coupling according to claim 5, characterized in that, The inner wall of the tracheal connection component (1) is also provided with a third sealing ring (10), which is located below the tracheal installation kit (4) and is used to seal the gap between the outer wall of the tracheal tube and the inner wall of the tracheal connection component (1).

10. The rotary quick coupling according to claim 1, characterized in that, The top of the tracheal installation kit (4) is provided with an outwardly folded retaining edge (402). When the tracheal installation kit (4) is installed on the tracheal connection component (1), the retaining edge (402) engages with the end of the tracheal connection component (1) to limit the tracheal installation kit (4) from being over-embedded.

Images