A rotary joint

Abstract

This utility model relates to a rotary joint, including an inner core, a limiting card, a lower rotary sleeve, an upper rotary sleeve, and a sealing ring. The inner core has an axially through-hole water passage. The upper end of the lower rotary sleeve and the lower end of the upper rotary sleeve are snap-fitted together, and the sealing ring is fitted onto the upper rotary sleeve. The upper end of the upper rotary sleeve has an outwardly extending annular edge. The upper and lower rotary sleeves are rotatably fitted onto the outer periphery of the inner core. The inner core has an annular groove, and the lower rotary sleeve has an insertion port. The limiting card is inserted into the insertion port and embedded in the annular groove. A sealing groove is also provided on the outer wall of the inner core, and a sealing ring for sealing with the inner wall of the upper rotary sleeve is provided in the sealing groove. In this utility model, the upper rotary sleeve and the inner core are sealed by a sealing ring, and a sealing ring is provided on the outer side of the upper rotary sleeve. The lower end of the upper rotary sleeve is then connected to the lower rotary sleeve by a snap-fit. The structure is very stable and the installation is very convenient.

Description

Technical Field

[0001] This utility model relates to the field of faucet accessories, specifically to a rotary joint. Background Technology

[0002] The rotary joint, a crucial component of a rotary faucet, enables the rotational connection between the water outlet bend and the faucet body. Early rotary joints used a C-ring fitted around the outer side of the inner water outlet core, connecting to the bend via the side of the C-ring. Later, a top-mounted limiting device was introduced to axially fix the rotating sleeve and sealing sleeve onto the inner water outlet core from top to bottom. However, because this top-mounted limiting device uses the sealing element to transmit axial force to fix the rotating sleeve, this type of rotary joint structure is not very stable.

[0003] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention

[0004] The main objective of this invention is to provide a rotary joint, and a new structure for the rotary joint, to solve the problem of insufficient stability of the rotary joint mentioned in the background art.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A rotary joint includes an inner core, a limiting clip, a lower rotary sleeve, an upper rotary sleeve, and a sealing ring; the inner core has an axially through-hole water passage; the upper end of the lower rotary sleeve and the lower end of the upper rotary sleeve are snapped together; the sealing ring is sleeved on the upper rotary sleeve; the upper end of the upper rotary sleeve has an outwardly extending annular edge; the upper and lower ends of the sealing ring abut against the annular edge of the upper rotary sleeve and the upper end of the lower rotary sleeve, respectively.

[0007] The rotating upper sleeve and rotating lower sleeve are rotatably fitted around the outer periphery of the inner core. The inner core is provided with an annular groove, and the rotating lower sleeve is formed with an insertion port. The limiting card is inserted into the insertion port and embedded into the annular groove. The outer wall of the inner core is also provided with a sealing groove corresponding to the position of the rotating upper sleeve. A sealing ring for sealing with the inner wall of the rotating upper sleeve is provided in the sealing groove.

[0008] Furthermore, the lower end of the rotating upper sleeve is provided with a hook, and the upper end of the rotating lower sleeve is provided with a slot, and the hook engages with the slot.

[0009] Furthermore, an upper boss is formed on the upper end of the rotating lower sleeve, and the diameter of the upper boss is smaller than the outer wall diameter of the rotating lower sleeve; the bayonet is formed on the upper boss; the lower end of the sealing ring has a lower groove that avoids the upper boss.

[0010] Furthermore, the upper protrusion has two symmetrical latches, and the lower end of the rotating upper sleeve is correspondingly provided with two symmetrical hooks.

[0011] Furthermore, the hook is positioned facing the inside of the rotating upper sleeve, and the latch forms a connection between the top and side wall of the upper protrusion; the lower part of the hook has a guide slope, and the upper part of the guide slope is connected to a locking plane; the hook is inserted from top to bottom, and the guide slope abuts against the latch until the locking plane is engaged with the latch.

[0012] Furthermore, the upper end of the sealing ring has a downwardly recessed groove, the upper end of which is completely covered by the annular edge.

[0013] Furthermore, the outer wall of the sealing ring has several annular protrusions from top to bottom; the sealing ring is made of silicone material.

[0014] Furthermore, a gear shift assembly is provided inside the rotating lower sleeve. The gear shift assembly includes an elastic element, a ball bearing, and a gear shift disc. The upper end of the gear shift disc is provided with a number of recesses spaced in a ring. The gear shift disc is fixedly sleeved on the inner core. The elastic element is installed in the mounting hole inside the rotating lower sleeve. The ball bearing is connected to the lower end of the elastic element. As the rotating lower sleeve rotates relative to the inner core, one of the ball bearings is selectively engaged in one of the recesses.

[0015] Furthermore, the outer wall of the rotating lower sleeve has a threaded connector or elastic fastener for connecting the water outlet pipe.

[0016] Furthermore, the lower end of the inner core has a threaded interface for connecting to the main body of the faucet.

[0017] With the above structure, the rotary joint of this utility model has at least the following beneficial effects:

[0018] First, the rotating lower sleeve and inner core are positioned using limiting clips and annular grooves, eliminating the need for indirect positioning with a sealing ring, resulting in greater stability. Furthermore, since the rotating upper and lower sleeves are interconnected via a snap-fit ​​connection, the sealing ring is axially clamped, facilitating its installation while preventing it from axially dislodging. The annular edge of the rotating upper sleeve also supports the inner wall of the outlet pipe. Therefore, the rotary joint provided by this invention offers superior stability.

[0019] Second, the hook and the latch cooperate to form a whole with the rotating upper sleeve and the rotating lower sleeve, which rotate synchronously. After the water outlet pipe is installed, the water outlet pipe is locked with the rotating lower sleeve. The internal sealing ring does not need to rotate relative to the water outlet pipe and the rotating upper sleeve, which reduces wear and helps to extend the service life.

[0020] Third, by setting a guide ramp, when the upper sleeve moves downward, the hook first elastically deforms outward until the locking plane on the hook engages with the slot. This installation method is simple and efficient.

[0021] Compared with existing technologies, this utility model features a rotating upper sleeve, which is sealed to the inner core by a sealing ring. A sealing ring is also provided on the outer side of the rotating upper sleeve, and the lower end of the rotating upper sleeve is connected to the rotating lower sleeve by a snap-fit ​​mechanism. The structure is very stable and installation is very convenient. Attached Figure Description

[0022] Figure 1 This is a three-dimensional cross-sectional view of a rotary joint according to this utility model.

[0023] Figure 2 This is a cross-sectional view of the rotary joint from another angle.

[0024] Figure 3 This is a three-dimensional exploded view of the rotary joint.

[0025] Figure 4 This is a three-dimensional exploded view of the rotary joint from another angle.

[0026] Figure 5 This is a three-dimensional sectional view of the rotary joint.

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the rotating lower sleeve.

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the rotating upper sleeve.

[0029] Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating upper sleeve.

[0030] In the picture:

[0031] Inner core 1; water passage 11; annular groove 12; sealing groove 13; sealing ring 131; threaded interface 14; limit card 2; rotating lower sleeve 3; insertion port 31; upper boss 32; bayonet 33; rotating upper sleeve 4; annular edge 41; hook 42; guide slope 421; locking plane 422; sealing ring 5; lower groove 51; upper recess 52; annular protrusion 53; elastic element 61; ball 62; gear plate 63; recess 631; threaded connector 7. Detailed Implementation

[0032] To further explain the technical solution of this utility model, the present invention will be described in detail below through specific embodiments.

[0033] like Figures 1 to 8As shown, this is a rotary joint according to the present invention, including an inner core 1, a limiting card 2, a rotating lower sleeve 3, a rotating upper sleeve 4, and a sealing ring 5; the inner core 1 has an axially through-hole water passage 11; the water passage 11 has an internal hexagonal structure; the upper end of the rotating lower sleeve 3 and the lower end of the rotating upper sleeve 4 are snapped together, and the sealing ring 5 is sleeved on the rotating upper sleeve 4; the upper end of the rotating upper sleeve 4 has an outwardly extending annular edge 41; the upper and lower ends of the sealing ring 5 are respectively connected to the rotating upper sleeve 4. The annular edge 41 of the sleeve 4 abuts against the upper end of the rotating lower sleeve 3; the rotating upper sleeve 4 and the rotating lower sleeve 3 are rotatably sleeved on the outer periphery of the inner core 1. The inner core 1 is provided with an annular groove 12, and the rotating lower sleeve 3 is formed with an insertion port 31. The limiting card 2 is inserted into the insertion port 31 and embedded into the annular groove 12; the outer wall of the inner core 1 is also provided with a sealing groove 13 corresponding to the position of the rotating upper sleeve 4. A sealing ring 131 for sealing with the inner wall of the rotating upper sleeve 4 is provided in the sealing groove 13.

[0034] The rotating lower sleeve 3 and the inner core 1 are positioned by the limiting card 2 and the annular groove 12, eliminating the need for indirect positioning via the sealing ring 5, thus providing greater stability. Furthermore, since the rotating upper sleeve 4 and the rotating lower sleeve 3 are interconnected via a snap-fit ​​connection, the sealing ring 5 is axially clamped, facilitating installation while preventing it from axially dislodging. The annular edge 41 of the rotating upper sleeve 4 also supports the inner wall of the water outlet pipe. Therefore, the rotary joint provided by this invention offers superior stability.

[0035] Preferably, the lower end of the rotating upper sleeve 4 is provided with a hook 42, and the upper end of the rotating lower sleeve 3 is provided with a slot 33, the hook 42 and the slot 33 engaging. The upper end of the rotating lower sleeve 3 has an upper boss 32, the diameter of which is smaller than the outer wall diameter of the rotating lower sleeve 3; the slot 33 is formed on the upper boss 32; the lower end of the sealing ring 5 has a lower groove 51 that avoids the upper boss 32. The upper boss 32 has two symmetrical slots 33, and the lower end of the rotating upper sleeve 4 is correspondingly provided with two symmetrical hooks 42.

[0036] The hook 42 and the slot 33 cooperate to form an integral unit with the rotating upper sleeve 4 and the rotating lower sleeve 3. They rotate synchronously during rotation. After the water outlet pipe is installed, the water outlet pipe is locked to the rotating lower sleeve 3. The internal sealing ring 5 does not need to rotate relative to the water outlet pipe and the rotating upper sleeve 4, which reduces wear and helps to extend the service life.

[0037] More specifically, the hook 42 is positioned facing the inside of the rotating upper sleeve 4, and the latch 33 forms a connection between the top and side wall of the upper protrusion 32; the lower part of the hook 42 has a guide slope 421, and the upper part of the guide slope 421 is connected to a locking plane 422; the hook 42 is inserted from top to bottom, and the guide slope 421 abuts against the latch 33 until the locking plane 422 engages with the latch 33. By setting the guide slope 421, when the rotating upper sleeve 4 moves downward, the hook 42 first elastically deforms outward until the locking plane 422 on the hook 42 engages with the latch 33. This installation is simple and efficient.

[0038] Preferably, the upper end of the sealing ring 5 has a downwardly recessed upper groove 52, the upper end of which is completely covered by the annular edge 41. If water enters the upper groove 52, the water pressure will cause the sealing ring 5 to expand outward, resulting in a better seal between the sealing ring 5 and the water outlet pipe.

[0039] Preferably, the outer wall of the sealing ring 5 has several annular protrusions 53 from top to bottom; the sealing ring 5 is made of silicone material. Multiple annular protrusions 53 form multiple seals, and the silicone material, being soft, is particularly suitable for use as a sealing element.

[0040] Preferably, the rotating lower sleeve 3 is internally provided with a gear shift assembly, which includes an elastic element 61, a ball bearing 62, and a gear shift disc 63. The gear shift disc 63 has a plurality of recesses 631 spaced annularly at its upper end. The gear shift disc 63 is fixedly fitted onto the inner core 1. The elastic element 61 is installed in a mounting hole within the rotating lower sleeve 3, and the ball bearing 62 is connected to the lower end of the elastic element 61. Preferably, the elastic element is a flexible tubular structure. As the rotating lower sleeve 3 rotates relative to the inner core 1, one of the ball bearings 62 engages in one of the recesses. Thus, when the rotating lower sleeve 3 rotates relative to the inner core 1, a gear shift feel and sound are generated, conveniently indicating the gear position to the user.

[0041] Preferably, the outer wall of the rotating lower sleeve 3 has a threaded connector 7 for connecting the water outlet pipe (e.g., Figure 6 (as shown in the figure) or an elastic fastener (not shown in the figure), the elastic fastener being an integrally formed elastic buckle on the rotating lower sleeve 3, the positioning buckle on the elastic fastener being able to be embedded into the hole of the water outlet pipe; the threaded connector 7 and the elastic fastener are both common means in rotary joints, and will not be described in detail here. Preferably, the lower end of the inner core 1 has a threaded interface 14 for connecting to the faucet body.

[0042] Compared with the prior art, this utility model features a rotating upper sleeve 4, which is sealed to the inner core 1 by a sealing ring 131. A sealing ring 5 is provided on the outer side of the rotating upper sleeve 4, and the lower end of the rotating upper sleeve 4 is connected to the rotating lower sleeve 3 by a snap-fit ​​connection. The structure is very stable and the installation is very convenient.

[0043] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A rotary joint, characterized in that, It includes an inner core, a limiting card, a rotating lower sleeve, a rotating upper sleeve, and a sealing ring; the inner core has an axially through-hole water passage; the upper end of the rotating lower sleeve and the lower end of the rotating upper sleeve are snapped together; the sealing ring is sleeved on the rotating upper sleeve; the upper end of the rotating upper sleeve has an outwardly extending annular edge; the upper and lower ends of the sealing ring abut against the annular edge of the rotating upper sleeve and the upper end of the rotating lower sleeve, respectively. The rotating upper sleeve and rotating lower sleeve are rotatably fitted around the outer periphery of the inner core. The inner core is provided with an annular groove, and the rotating lower sleeve is formed with an insertion port. The limiting card is inserted into the insertion port and embedded into the annular groove. The outer wall of the inner core is also provided with a sealing groove corresponding to the position of the rotating upper sleeve. A sealing ring for sealing with the inner wall of the rotating upper sleeve is provided in the sealing groove.

2. A rotary joint as described in claim 1, characterized in that, The lower end of the rotating upper sleeve is provided with a hook, and the upper end of the rotating lower sleeve is provided with a slot, and the hook engages with the slot.

3. A rotary joint as described in claim 2, characterized in that, The upper end of the rotating lower sleeve has an upper boss, the diameter of which is smaller than the outer wall diameter of the rotating lower sleeve; the bayonet is formed on the upper boss; the lower end of the sealing ring has a lower groove that avoids the upper boss.

4. A rotary joint as described in claim 3, characterized in that, The upper protrusion has two symmetrical latches, and the lower end of the rotating upper sleeve is correspondingly provided with two symmetrical hooks.

5. A rotary joint as described in claim 3, characterized in that, The hook is positioned facing the inside of the rotating upper sleeve, and the latch is formed at the connection between the top of the upper protrusion and the side wall; the lower part of the hook has a guide slope, and the upper part of the guide slope is connected to a locking plane; the hook is inserted from top to bottom, and the guide slope abuts against the latch until the locking plane is engaged with the latch.

6. A rotary joint as described in claim 1, characterized in that, The upper end of the sealing ring has a downward recessed groove, the upper end of which is completely covered by the annular edge.

7. A rotary joint as described in claim 1, characterized in that, The outer wall of the sealing ring has several annular protrusions from top to bottom; the sealing ring is made of silicone material.

8. A rotary joint as described in any one of claims 1-7, characterized in that, The rotating lower sleeve has a gear shift assembly inside, which includes an elastic element, a ball bearing, and a gear shift disc. The upper end of the gear shift disc has several recesses spaced in a ring. The gear shift disc is fixedly sleeved on the inner core. The elastic element is installed in the mounting hole inside the rotating lower sleeve, and the ball bearing is connected to the lower end of the elastic element. As the rotating lower sleeve rotates relative to the inner core, one of the ball bearings is selectively engaged in one of the recesses.

9. A rotary joint as described in claim 8, characterized in that, The outer wall of the rotating lower sleeve has a threaded connector or elastic fastener for connecting the water outlet pipe.

10. A rotary joint as described in claim 8, characterized in that, The lower end of the inner core has a threaded interface for connecting to the main body of the faucet.

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