Rotary joint

Abstract

The utility model belongs to the technical field of kitchen and bath accessories, and relates to a rotary joint, which comprises a rotary sleeve and an inner core, the inner core is inserted into the rotary sleeve and is rotatably connected with the rotary sleeve, and the upper end of the rotary sleeve is axially provided with a plurality of end opening grooves and forms a radial deformation structure. An inner protruding ring extending inwards is arranged on the inner side, corresponding to the end opening groove, of the rotating sleeve, an outer protruding ring extending outwards is arranged at the upper end of the inner core, and the upper end face of the inner protruding ring abuts against the lower end face of the outer protruding ring to form a clamping structure. The rotary joint provided by the utility model has the advantages of simple structure and convenience in installation.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen and bathroom accessories and relates to a rotary joint. Background Art

[0002] Some faucets require the outlet pipe to rotate during use, and their joint structure uses a swivel joint. A swivel joint generally consists of a rotating sleeve and an inner core, which rotates to connect the sleeve and the inner core, ensuring the rotational connection between the faucet body and the outlet pipe. This type of swivel joint requires multiple mounting parts during installation, making the assembly process relatively cumbersome.

[0003] Chinese utility model patent CN 211821199 U (publication date: 2020-10-30) discloses a faucet rotary joint, comprising an inner core, a rotating sleeve, and a limiting ring. The rotating sleeve is provided with a central through hole for rotatably mounting the inner core. The lower side of the inner core is provided with a limiting step protruding radially outward. The limiting ring is provided on the upper side of the inner core and cooperates with the limiting step to rotatably mount the rotating sleeve on the inner core. The rotating sleeve is provided with an outer sealing ring, and the inner core is provided with an inner sealing ring. The outer wall of the rotating sleeve is provided with an outer sealing groove for mounting the outer sealing ring, and the inner wall of the rotating sleeve is provided with an inner sealing groove for mounting the inner sealing ring. The outer and inner sealing grooves are staggered in the axial direction of the rotating sleeve. The above-mentioned faucet rotary joint uses a limiting ring to mount the rotating sleeve and inner core, which simplifies the mounting structure, but there is still room for further improvement. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a rotary joint with the advantages of simple structure and convenient installation.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A rotary joint comprises a rotating sleeve and an inner core, wherein the inner core is inserted into the rotating sleeve and rotatably connected thereto, the upper end of the rotating sleeve is provided with a plurality of end opening grooves along the axial direction to form a radial deformation structure, the inner side of the rotating sleeve corresponding to the end opening grooves is provided with an inner convex ring extending inward, and the upper end of the inner core is provided with an outer convex ring extending outward, the upper end surface of the inner convex ring abuts against the lower end surface of the outer convex ring to form a clamping structure.

[0007] In the above-mentioned rotary joint, the upper end of the outer circumferential surface of the outer convex ring is provided with an outer guide inclined surface inclined outward from top to bottom, and the lower end of the inner circumferential surface of the inner convex ring is provided with an inner guide inclined surface inclined outward from top to bottom; preferably, the outer guide inclined surface and the inner guide inclined surface have the same guide inclination.

[0008] In the above-mentioned rotary joint, the end opening grooves are evenly distributed along the circumference. Furthermore, the number and groove width of the end opening grooves are determined according to the specifications of the rotary joint. The more the number of end opening grooves and the wider the groove width, the easier it is for them to deform. Conversely, the connection is more secure.

[0009] In the above-mentioned rotary joint, a limiting convex ring and a threaded joint are provided at the lower end of the inner core, a limiting stop that cooperates with the limiting convex ring to limit the position is provided at the bottom of the rotating sleeve, and the threaded joint is located below the rotating sleeve.

[0010] In the above-mentioned rotary joint, a gear ring is sleeved on the inner core above the limiting convex ring, and a plurality of gear grooves are provided on the upper end surface of the gear ring. An accommodating inner groove cooperating with the gear ring is provided in the rotating sleeve, and an axial gear adjustment mounting hole is provided above the accommodating inner groove. A spring and a gear head are installed in the gear adjustment mounting hole, and the spring drives the gear head to contact the gear groove and form an adjustment gear.

[0011] In the above-mentioned rotary joint, a circumferential limiting structure is provided between the inner wall of the gear ring and the outer wall of the inner core; further, the circumferential limiting structure includes a polygonal convex ring provided on the outer wall of the inner core and a polygonal groove provided on the inner wall of the gear ring.

[0012] In the above-mentioned rotary joint, the upper end of the outer wall of the rotating sleeve is provided with a plurality of first annular sealing grooves for fitting the first O-rings, and the uppermost first O-ring is arranged corresponding to the end opening groove; the upper end of the outer wall of the inner core is provided with a plurality of second annular sealing grooves for fitting the second O-rings, and the second O-rings are sealed and connected to the inner wall of the rotating sleeve; the lower end of the outer wall of the inner core is provided with a third annular sealing groove for fitting the third O-ring; the third annular sealing groove is arranged between the threaded joint and the limiting convex ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model provides a rotary joint with an improved installation structure. By providing an open end slot, the upper end of the rotating sleeve is formed into a radially deformable structure. The rotating sleeve and the inner core are then directly connected by an inner convex ring and an outer convex ring. This utility model does not require the use of mounting accessories; installation is completed by simply inserting the inner core into the rotating sleeve, which is very convenient.

[0015] 2. The present invention further provides a gear ring, which can cooperate with the gear adjustment limit structure (spring and gear head) to form a rotary joint with gears, or it can form a freely adjustable rotary joint without using the gear adjustment limit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a perspective view of embodiment 1 of the present utility model;

[0017] Figure 2 This is an axial cross-sectional view of Example 1 of the present utility model;

[0018] Figure 3 This is a three-dimensional diagram of the rotating sleeve of Example 1 of the present utility model;

[0019] Figure 4 This is a three-dimensional diagram of the inner core of Example 1 of the present utility model;

[0020] Figure 5 This is a three-dimensional diagram of the gear ring of Example 1 of the present utility model;

[0021] Figure 6 This is an axial cross-sectional view of Example 2 of the present utility model;

[0022] Reference numerals: 1, rotating sleeve; 11, end opening groove; 12, inner convex ring; 13, inner guide inclined surface; 14, limit stop; 15, accommodating inner groove; 16, gear adjustment mounting hole; 17, spring; 18, gear head; 19, first annular sealing groove;

[0023] 2. Inner core; 21. Outer convex ring; 22. Outer guide bevel; 23. Limiting convex ring; 24. Threaded joint; 25. Shift ring; 26. Shift groove; 27. Circumferential limiting structure; 28. Second annular sealing groove; 29. Third annular sealing groove;

[0024] 3. First O-ring;

[0025] 4. Second O-ring;

[0026] 5. The third O-ring. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-6 :

[0028] Example 1

[0029] A rotary joint comprises a rotating sleeve 1 and an inner core 2, wherein the inner core 2 is inserted into the rotating sleeve 1 and rotatably connected thereto, wherein the upper end of the rotating sleeve 1 is provided with a plurality of end opening grooves 11 along the axial direction and forms a radial deformation structure, wherein the inner side of the rotating sleeve 1 corresponding to the end opening grooves 11 is provided with an inner convex ring 12 extending inwardly, and the upper end of the inner core 2 is provided with an outer convex ring 21 extending outwardly. In this embodiment, the outer convex ring 21 is formed by providing an annular groove on the outer wall of the inner core 2. The radial dimension of the outer ring is roughly the same as that of the inner core 2 and is larger than the radial dimension of the inner ring of the inner convex ring 12. Therefore, the outer convex ring 21 and the inner convex ring 12 can be hooked with each other to form a fixed structure. After installation, the upper end surface of the inner convex ring 12 contacts the lower end surface of the outer convex ring 21 to form a clamping structure; the lower end of the inner core 2 is provided with a limiting convex ring 23 and a threaded joint 24, and the bottom of the rotating sleeve 1 is provided with a limiting stop 14 that cooperates with the limiting convex ring 23 to limit the position, and the threaded joint 24 is located below the rotating sleeve 1.

[0030] Furthermore, in order to guide the outer convex ring 21 to be inserted into the inner convex ring 12 from bottom to top, the upper end of the outer circumferential surface of the outer convex ring 21 is provided with an outer guide bevel 22 inclined outward from top to bottom, and the lower end of the inner circumferential surface of the inner convex ring 12 is provided with an inner guide bevel 13 inclined outward from top to bottom; preferably, the outer guide bevel 22 and the inner guide bevel 13 have the same guide inclination.

[0031] During installation, align the inner core 2 with the inner cavity of the rotating sleeve 1 and insert it from bottom to top. When the outer guide bevel 22 conflicts with the inner guide bevel 13, the outer guide bevel 22 squeezes the inner guide bevel 13, so that the upper end of the rotating sleeve 1 provided with the end opening groove 11 produces an outward radial deformation, and the inner core 2 can move upward. After the outer convex ring 21 passes over the inner convex ring 12, the extrusion force disappears, and the upper end of the rotating sleeve 1 recovers the deformation. The inner convex ring 12 forms the lower axial limiting structure of the outer convex ring 21 to prevent the inner core 2 from moving downward. At the same time, the inner core 2 limiting convex ring 23 conflicts with the limiting stop 14 of the rotating sleeve 1, and the limiting stop 14 forms the upper limit structure of the limiting convex ring 23 to prevent the inner core 2 from moving upward. Thus, the rotating sleeve 1 and the inner core 2 form a clamping structure. In addition, when the inner core 2 is subjected to a downward force, the outer convex ring 21 squeezes the inner convex ring 12, which can also cause the upper end of the rotating sleeve 1 to produce an inward radial deformation, further holding the outer convex ring 21, and forming a more secure connection structure.

[0032] The end opening slots 11 are evenly distributed along the circumference. Furthermore, the number and width of the end opening slots 11 are determined by the specifications of the rotary joint. A greater number of end opening slots 11 and a wider slot width facilitate deformation, while a smaller number results in a more secure connection. In this embodiment, a total of four end opening slots 11 are provided.

[0033] In order to enhance the sealing performance, the upper end of the outer wall of the rotating sleeve 1 is provided with a plurality of first annular sealing grooves 19 for fitting the first O-ring 3, and the uppermost first O-ring 3 is arranged corresponding to the end opening groove 11; the upper end of the outer wall of the inner core 2 is provided with a plurality of second annular sealing grooves 28 for fitting the second O-ring 4, and the second O-ring 4 is sealed and connected to the inner wall of the rotating sleeve 1; the lower end of the outer wall of the inner core 2 is provided with a third annular sealing groove 29 for fitting the third O-ring 5; the third annular sealing groove 29 is arranged between the threaded joint 24 and the limiting convex ring 23; the first O-ring 3 and the third O-ring 5 are used for sealing the rotary joint and other accessories.

[0034] The rotary joint of this embodiment also has a gear function, and its specific structure is:

[0035] A gear ring 25 is sleeved on the inner core 2 above the above-mentioned limiting convex ring 23, and a plurality of gear grooves 26 are provided on the upper end surface of the gear ring 25. An accommodating inner groove 15 cooperating with the gear ring 25 is provided in the rotating sleeve 1, and an axial gear adjustment mounting hole 16 is provided above the accommodating inner groove 15. A spring 17 and a gear head 18 are installed in the gear adjustment mounting hole 16. The spring 17 drives the gear head 18 to contact the gear groove 26 and form an adjustment gear. In this embodiment, the gear groove 26 is a semicircular groove.

[0036] When the rotating sleeve 1 is rotated by external force, the gear head 18 and the spring 17 are retracted upward into the gear adjustment mounting hole 16 under the extrusion of the gear groove 26, and the gear head 18 is disengaged from the gear groove 26. When it is rotated to the next gear, the gear head 18 is re-engaged in the next gear groove 26 under the drive of the spring 17. After the external force disappears, a relatively firm circumferential fixed structure can be formed.

[0037] In order to limit the rotation of the gear ring 25 relative to the inner core 2, a circumferential limiting structure 27 is provided between the inner wall of the gear ring 25 and the outer wall of the inner core 2; further, the circumferential limiting structure 27 includes a polygonal convex ring provided on the outer wall of the inner core 2 and a polygonal groove provided on the inner wall of the gear ring 25.

[0038] Example 2

[0039] The structure of this embodiment is basically the same as that of embodiment 1. Figure 6 , its difference is that, in this embodiment, spring 17 and gear head 18 are not included. Therefore, the rotary joint of this embodiment can be adjusted at will.

[0040] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotary joint comprising a rotating sleeve (1) and an inner core (2), wherein the inner core (2) is inserted into the rotating sleeve (1) and rotatably connected thereto, characterized in that: The upper end of the rotating sleeve (1) is provided with a plurality of end opening grooves (11) along the axial direction to form a radial deformation structure, and an inner convex ring (12) extending inward is provided on the inner side of the rotating sleeve (1) corresponding to the end opening grooves (11), and an outer convex ring (21) extending outward is provided on the upper end of the inner core (2), and the upper end surface of the inner convex ring (12) contacts the lower end surface of the outer convex ring (21) to form a clamping structure.

2. A rotary joint according to claim 1, characterized in that: The upper end of the outer peripheral surface of the outer convex ring (21) is provided with an outer guide inclined surface (22) inclined outward from top to bottom, and the lower end of the inner peripheral surface of the inner convex ring (12) is provided with an inner guide inclined surface (13) inclined outward from top to bottom.

3. A rotary joint according to claim 1, characterized in that: The end opening grooves (11) are evenly distributed along the circumference.

4. A rotary joint according to claim 1, characterized in that: The lower end of the inner core (2) is provided with a limiting convex ring (23) and a threaded joint (24); the bottom of the rotating sleeve (1) is provided with a limiting stop (14) that cooperates with the limiting convex ring (23) to limit the position; the threaded joint (24) is located below the rotating sleeve (1).

5. A rotary joint according to claim 4, characterized in that: A gear ring (25) is sleeved on the inner core (2) above the limiting convex ring (23), and a plurality of gear grooves (26) are provided on the upper end surface of the gear ring (25). An accommodating inner groove (15) cooperating with the gear ring (25) is provided in the rotating sleeve (1), and an axial gear adjustment mounting hole (16) is provided above the accommodating inner groove (15). A spring (17) and a gear head (18) are installed in the gear adjustment mounting hole (16), and the spring (17) drives the gear head (18) to contact the gear groove (26) and form an adjustment gear.

6. A rotary joint according to claim 5, characterized in that: A circumferential limiting structure (27) is provided between the inner wall of the gear ring (25) and the outer wall of the inner core (2).

7. The rotary joint according to claim 1, characterized in that: The upper end of the outer wall of the rotating sleeve (1) is provided with a plurality of first annular sealing grooves (19) for fitting a first O-ring (3), and the uppermost first O-ring (3) is provided corresponding to the end opening groove (11); the upper end of the outer wall of the inner core (2) is provided with a plurality of second annular sealing grooves (28) for fitting a second O-ring (4), and the second O-ring (4) is sealedly connected to the inner wall of the rotating sleeve (1); and the lower end of the outer wall of the inner core (2) is provided with a third annular sealing groove (29) for fitting a third O-ring (5).

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