Universal joint

Abstract

The utility model discloses a universal joint which comprises a rotating ball head, a sealing ring, a clamping sleeve, a connecting nut, a bubbler, a water outlet pressing ring and the like, the rotating ball head is composed of a ball body and a ball seat, and the sealing ring, the ball body and the clamping sleeve are jointly installed in the connecting nut in an extrusion mode. The front end of the ball body is movably assembled in a ball cavity at the rear end of the clamping sleeve to form universal rotation, the circumference of the outer surface of the rear end of the ball body is tightly attached to the sealing ring to form rotary sealing, the clamping sleeve can be directly inserted and fixed in the connecting nut in an interference fit mode to form self-locking, and universal rotation of the ball head is not limited; therefore, by adopting the extrusion installation, the conciseness of the structure and the convenience of assembly can be ensured, a retainer ring in a traditional structure is removed, so that the attractiveness of the appearance of a product can be improved, water outlet pollution caused by dirt hiding at the retainer ring can be avoided, the production cost can be reduced, and particularly, the ball can bear frequent universal rotation without falling off, so that the service life of the ball is prolonged. And the use reliability of the structure is ensured.

Description

Technical Field

[0001] The utility model relates to a water outlet joint applied to a faucet, in particular to a universal joint. Background Art

[0002] Universal joint is an important water outlet accessory in faucet products. It is mainly configured in bidet faucets, washbasin faucets or kitchen faucets for universal rotation of water outlet. Its structure is as follows: Figure 10 、 Figure 11 As shown, it usually includes a rotating ball head, a sealing ring, a ferrule, a connecting nut, a bubbler and a water outlet pressure ring. The rotating ball head is composed of a sphere and a ball seat. The sealing ring and the ferrule are both built into the connecting nut, and the front end of the sphere is movably fitted in the ball cavity of the ferrule to form a universal rotation, while the outer surface of the rear end of the sphere is circumferentially close to the sealing ring to form a rotating seal, and then limited by an open clamping ring clamped in the rear end of the connecting nut to prevent the sealing ring and the ball from moving axially backward and falling off. Among them, after the clamping ring is installed in place, it is often exposed at the rotating part of the sphere. Although it does not affect the normal universal rotation of the sphere, it is not aesthetically pleasing and is also easy to hide dirt and grime here, causing water pollution; at the same time, the clamping ring is engaged by elastic expansion at the opening. In actual use, it is easy to be accidentally squeezed and fall off due to the frequent universal rotation of the sphere, thereby causing the sealing ring and the sphere to separate from the connecting nut, which greatly affects the reliability of the structure; in addition, the engagement limit structure using the clamping ring is more troublesome during the assembly process, and the increase of the clamping ring component also correspondingly increases the production cost of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a universal joint which has beautiful appearance, simple structure, convenient assembly, reliable use, can avoid the accumulation of dirt and reduce production costs.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A universal joint comprises a rotating ball head, a sealing ring, a ferrule, a connecting nut, a bubbler and a water outlet pressure ring. The rotating ball head is composed of a sphere and a ball seat. The bubbler is installed in the water outlet pressure ring and is sealed at the front end of the connecting nut by the water outlet pressure ring. The sealing ring, sphere and ferrule are installed together in the connecting nut by extrusion, and the front end of the sphere is movably fitted in the ball cavity at the rear end of the ferrule to form universal rotation. The outer surface of the rear end of the sphere is tightly attached to the sealing ring to form a rotating seal.

[0006] The connecting nut is provided with a connecting hole for the sealing ring, sphere and ferrule to be squeezed in; the ferrule is fixed to the front end of the connecting hole through interference fit; the rear end of the connecting hole is provided with a stop edge, and the axial backward movement of the sealing ring and the sphere is restricted by the stop edge.

[0007] A limiting convex ring and a limiting ring groove for limiting assembly are respectively provided between the clamping sleeve and the connecting hole.

[0008] The front end of the ball cavity is provided with a limiting step for limiting the axial forward movement of the ball.

[0009] A sealing gasket is provided between the bubbler and the connecting nut.

[0010] The sealing gasket and the bubbler are installed together in the water outlet pressure ring, which is screwed tightly to the front end of the connecting nut and drives the bubbler to push the sealing gasket tightly against the front end of the connecting nut to form an installation seal.

[0011] A limiting inner shoulder and a limiting outer shoulder are respectively provided between the water outlet pressure ring and the bubbler.

[0012] The rear end of the bubbler is provided with a sealing ring surface which is in close contact with the sealing gasket.

[0013] The rear end of the ball seat is provided with a mounting gasket.

[0014] The outer surface of the connecting nut is provided with opposite edges.

[0015] Compared with the prior art, the present invention mainly installs the sealing ring, the ball and the ferrule together in the connecting nut by extrusion, and makes the front end of the sphere movably fitted in the ball cavity at the rear end of the ferrule to form universal rotation. The outer surface circumference of the rear end of the sphere is tightly against the sealing ring to form a rotating seal, and the ferrule can also be directly inserted and fixed in the connecting nut by interference fit to form self-locking, so that the universal rotation of the ball head is not restricted; therefore, the use of this extrusion installation structure can not only omit the trouble of the traditional structure that requires the clamping ring for clamping and limiting, thereby ensuring the simplicity of the structure and the convenience of assembly, but also the removal of the clamping ring as a component can not only enhance the appearance of the product, but also avoid the water pollution caused by the accumulation of dirt and grime here, and reduce the production cost. In particular, it can withstand the frequent universal rotation of the ball without falling off, thereby ensuring the reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the present utility model.

[0017] Figure 2 for Figure 1 3D exploded view of .

[0018] Figure 3 A cross-sectional view of the rotating ball head.

[0019] Figure 4 This is a cross-sectional view of the ferrule.

[0020] Figure 5 A cross-sectional view of the connecting nut.

[0021] Figure 6 This is the outline drawing of the connecting nut.

[0022] Figure 7 This is a cross-sectional view of the water outlet pressure ring.

[0023] Figure 8 Schematic diagram of the structure of the bubbler.

[0024] Figure 9 A cross-sectional view of the gasket installation.

[0025] Figure 10 It is a cross-sectional view of an existing universal joint.

[0026] Figure 11 It is a three-dimensional exploded view of an existing universal joint. DETAILED DESCRIPTION

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 11 As shown, 1. rotating ball head, 11. sphere, 12. ball seat, 121. annular sealing groove, 13. through hole, 2. ferrule, 21. ball cavity, 22. limiting convex ring, 23. limiting step, 3. connecting nut, 31. opposite side, 32. connecting hole, 33. limiting ring groove, 34. anti-slip edge, 4. bubbler, 41. limiting outer shoulder, 42. sealing ring surface, 5. water outlet pressure ring, 51. limiting inner shoulder, 6. sealing ring, 7. sealing gasket, 8. mounting gasket, 81. annular boss, 9. clamping ring.

[0029] A universal joint, such as Figure 1 、 Figure 2 As shown, it is an important water outlet accessory in the faucet product and can be configured in the bidet faucet, wash basin faucet or kitchen faucet for universal rotation of water outlet. Its structure mainly includes a rotating ball head 1, a sealing ring 6, a ferrule 2, a connecting nut 3, a bubbler 4 and a water outlet pressure ring 5. Figure 1 、 Figure 2 The left side of the view is shown as the rear end or back side of the universal joint, and the right side of the view is shown as the front end or front side of the universal joint.

[0030] The rotating ball head 1 is composed of a sphere 11 at the front end and a disc-shaped ball seat 12 at the rear end. The outer circumferential surface of the ball seat is provided with an external thread, which can be used to screw it into the water outlet pipe (not shown) port of the faucet. The rear end of the ball seat 12 is provided with a mounting gasket 8. Usually, the mounting gasket 8 is fixed by embedding the coaxial annular boss 81 on the front end surface into the coaxial annular sealing groove 121 on the rear end surface of the ball seat 12, thereby realizing the screw connection and sealing of the ball seat 12.

[0031] The rotating ball head 1 is provided with a hexagonal through hole 13 extending along the axis thereof to facilitate the passage of water, and the hexagonal through hole 13 also serves to drive the ball seat 12 for tightening connection.

[0032] The sealing ring 6, the sphere 11 and the ferrule 2 are installed together in the connecting hole 32 which passes axially through the connecting nut 3 by means of a punch press, that is, the sealing ring 6, the sphere 11 and the ferrule 2 are extruded and installed in the connecting hole 32, and the front end of the sphere 11 is movably fitted in the ball cavity 21 at the rear end of the ferrule 2 to form universal rotation.

[0033] The ferrule 2 is a cylindrical sleeve, which is mainly fixed to the front end of the connecting hole 32 by interference fit to form a self-locking. A limiting convex ring 22 and a limiting ring groove 33 are respectively provided between the ferrule 2 and the connecting hole 32. Figure 1 As shown, a circumferential limiting convex ring 22 is provided on the outer circumferential surface of the front end of the ferrule 2, and a circumferential limiting ring groove 33 is provided on the inner circumferential surface of the front end of the connecting hole 32. Therefore, when the ferrule 2 is inserted into the front end of the connecting hole 32 by an interference fit, the insertion stroke of the ferrule 2 can be limited by the limiting convex ring 22 fitted in the limiting ring groove 33, thereby ensuring the accuracy of the assembly position of the ferrule in the connecting hole 32 and avoiding excessive insertion of the ferrule 2 into the connecting hole 32 to interfere with the universal rotation of the sphere 11. A limiting step 23 is also provided at the front end of the ball cavity 21, which can be used to limit the axial forward movement of the sphere 11.

[0034] The outer surface circumference of the rear end of the sphere 11 is tightly against the sealing ring 6 to form a rotating seal, and the sealing ring 6 can be an O-ring; and the rear end of the connecting hole 32 is provided with a stop edge 34, which is a circular ring integrally formed at the rear end of the connecting nut 3, and the axial backward movement and falling off of the sealing ring 6 and the sphere 11 can be limited by the stop edge 34.

[0035] Obviously, the use of this extrusion installation structure can not only omit Figure 10 、 Figure 11The traditional structure shown in the figure also needs to use the clamping ring 9 to perform the trouble of clamping and limiting, ensuring the simplicity of the structure and the convenience of assembly. In addition, the clamping ring 9 is removed and replaced by a stop edge, which can not only improve the aesthetics of the product appearance, but also avoid water pollution caused by dirt and grime here, and reduce production costs. In particular, it can withstand frequent universal rotation of the ball without falling off, ensuring the reliability of the structure.

[0036] The outer surface of the connecting nut 3 is provided with opposite edges 31 , which are usually designed to be multiple and symmetrically arranged on the outer surface of the connecting nut 3 , and their function is to assist the rotation connection of the connecting nut 3 and prevent slipping.

[0037] The bubbler 4 is installed in the water outlet pressure ring 5, and a sealing gasket 7 is provided between the bubbler 4 and the connecting nut 3, that is, the sealing gasket and the bubbler 4 are installed together in the water outlet pressure ring 5, and the water outlet pressure ring drives the bubbler 4 to be sealed and installed at the front end of the connecting nut 3. The specific structure is: the water outlet pressure ring 5 is connected to the external thread at the front end of the connecting nut 3 by screwing through the internal thread hole at the rear end, and drives the bubbler 4 to push the sealing gasket 7 tightly against the front end of the connecting nut 3 to form an installation seal.

[0038] Therefore, a limiting inner shoulder 51 and a limiting outer shoulder 41 need to be respectively provided between the water outlet pressure ring 5 and the bubbler 4, so that the bubbler 4 can be pressed by the water outlet pressure ring 5, and the rear end of the bubbler needs to be provided with a sealing ring surface 42 that is close to the sealing gasket 7 to improve the sealing performance.

[0039] In this way, the water flow can pass through the through hole 13 in the rotating ball head 1, the sleeve 2 and the bubbler 4 in sequence, and then can be discharged from the water outlet pressure ring 5.

[0040] The above embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should also be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope of the claims appended hereto.

Claims

1. A universal joint, comprising a rotating ball head (1), a sealing ring (6), a ferrule (2), a connecting nut (3), a bubbler (4) and a water outlet pressure ring (5), wherein the rotating ball head (1) is composed of a sphere (11) and a ball seat (12), the bubbler (4) is installed in the water outlet pressure ring (5), and is sealed by the water outlet pressure ring and installed at the front end of the connecting nut (3), characterized in that The sealing ring (6), the sphere (11) and the ferrule (2) are installed together in the connecting nut (3) by extrusion, and the front end of the sphere (11) is movably mounted in the ball cavity (21) at the rear end of the ferrule (2) to form a universal rotation, and the outer surface of the rear end of the sphere (11) is tightly attached to the sealing ring (6) to form a rotating seal.

2. A universal joint according to claim 1, characterized in that The connecting nut (3) is provided with a connecting hole (32) for the sealing ring (6), the sphere (11) and the ferrule (2) to be squeezed in; the ferrule (2) is fixed to the front end of the connecting hole (32) through interference fit; the rear end of the connecting hole (32) is provided with a stop edge (34), and the sealing ring (6) and the sphere (11) are restricted from axially moving backward and falling off by the stop edge.

3. A universal joint according to claim 2, characterized in that A limiting convex ring (22) and a limiting ring groove (33) are respectively provided between the ferrule (2) and the connecting hole (32).

4. A universal joint according to claim 1, characterized in that The front end of the ball cavity (21) is provided with a limiting step (23) for limiting the axial forward movement of the ball (11).

5. A universal joint according to claim 1, characterized in that A sealing gasket (7) is provided between the bubbler (4) and the connecting nut (3).

6. A universal joint according to claim 5, characterized in that The sealing gasket (7) and the bubbler (4) are installed together in the water outlet pressure ring (5), and the water outlet pressure ring is screwed and connected to the front end of the connecting nut (3), and drives the bubbler (4) to push the sealing gasket (7) tightly against the front end of the connecting nut (3) to form an installation seal.

7. A universal joint according to claim 1, characterized in that A limiting inner shoulder (51) and a limiting outer shoulder (41) are respectively provided between the water outlet pressure ring (5) and the bubbler (4).

8. The universal joint according to claim 5, characterized in that The rear end of the bubbler (4) is provided with a sealing ring surface (42) that is in close contact with the sealing gasket (7).

9. The universal joint according to claim 1, characterized in that A mounting gasket (8) is provided at the rear end of the ball seat (12).

10. The universal joint according to claim 1, characterized in that The outer surface of the connecting nut (3) is provided with opposite edges (31).

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