Rotary joint

Abstract

The utility model discloses a rotary joint which comprises an inner core pipe, a rotary sleeve and a sealing assembly, and the rotary sleeve is coaxially and rotatably sleeved on the outer side of the inner core pipe; an upper shaft section is arranged on the outer wall of the inner core pipe, the sealing assembly is arranged on the upper shaft section in a sleeving mode, the lower portion of the upper shaft section is connected with a lower annular limiting step, and the lower portion of the sealing assembly abuts against the lower annular limiting step; a sealing section is formed on the inner wall of the rotating sleeve, and the outer wall of the sealing assembly abuts against the sealing section. An upper annular limiting step is formed on the upper portion of the sealing section, and the upper end of the sealing assembly abuts against the upper annular limiting step. Compared with the prior art, the sealing assembly is fixed through the upper shaft section and the lower annular limiting step on the inner core pipe and the sealing section and the upper annular limiting step on the rotating sleeve, a traditional sealing ring groove does not need to be formed in the inner core pipe, and the production cost of the inner core pipe is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bathrooms, in particular to a rotary joint. Background Art

[0002] The faucet rotary joint is a component used between the water outlet pipe of a faucet and the main body of the faucet. The existing faucet rotary joint usually includes an inner core tube and a rotating sleeve arranged outside the inner core tube. Multiple inner sealing rings are arranged between the rotating sleeve and the inner core tube, and multiple outer sealing rings are arranged between the rotating sleeve and the water outlet pipe.

[0003] For example, Chinese patents CN210372418U (publication date 2020-04-21) and CN221683873U (publication date 2024-09-10) have multiple sealing ring grooves on the inner core tube for installing inner sealing rings. The provision of sealing ring grooves increases the difficulty and cost of producing the inner core tube. As the market competition for rotary joint products intensifies, how to further reduce production costs has become a pressing issue for rotary joint manufacturers.

[0004] In view of this, the inventors conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Utility Model Content

[0005] The main purpose of the utility model is to provide a rotary joint, which has the characteristic of reducing production costs.

[0006] In order to achieve the above objectives, the solution of the present invention is:

[0007] A rotary joint, comprising an inner core tube, a rotating sleeve and a sealing assembly, wherein the rotating sleeve is coaxially rotatably sleeved on the outside of the inner core tube; an upper shaft section is provided on the outer wall of the inner core tube, the sealing assembly is sleeved on the upper shaft section, the lower part of the upper shaft section is connected to a lower annular limiting step, and the lower part of the sealing assembly abuts against the lower annular limiting step; a sealing section is formed on the inner wall of the rotating sleeve, and the outer wall of the sealing assembly abuts against the sealing section; an upper annular limiting step is formed on the upper part of the sealing section, and the upper end of the sealing assembly abuts against the upper annular limiting step.

[0008] Furthermore, the sealing assembly includes a lower limit ring, a spacer ring and at least two inner sealing rings; the lower part of the lower limit ring abuts on the lower annular limit step, and the upper end of the lower limit ring abuts on the inner sealing ring; the spacer ring is located between two adjacent inner sealing rings; the upper end of the inner sealing ring abuts on the upper annular limit step.

[0009] Furthermore, the outer diameter of the spacer ring is smaller than the outer diameter of the lower limiting ring, and the outer diameter of the lower limiting ring is smaller than the outer diameter of the inner sealing ring.

[0010] Furthermore, the number of the inner sealing rings is two or three, and the number of the spacer rings is one less than the number of the inner sealing rings.

[0011] Furthermore, the lower limit ring and the spacer ring are both made of plastic.

[0012] Furthermore, an annular groove is formed on the inner core tube above the sealing assembly, and a socket is formed on the rotating sleeve. An axial limiting block is provided in the socket and is engaged with the annular groove.

[0013] Furthermore, a lower shaft section is formed on the inner core tube, a clamping section is formed at the lower part of the lower shaft section, a bead plate is fixed on the clamping section, and a plurality of gear holes distributed in a ring are formed on the bead plate; marbles are provided on the rotating sleeve, and the marbles can be embedded in the gear holes.

[0014] Furthermore, the clamping section is polygonal in shape; a sinking groove having the same shape as the clamping section is formed in the bead plate, and an air avoidance groove is provided at the lower part of the sinking groove.

[0015] Furthermore, the inner core tube is made of metal, and an external thread is provided at the lower portion of the inner core tube.

[0016] Furthermore, the rotating sleeve is made of plastic material, an outer sealing ring is provided on the outer side of the rotating sleeve, and a connecting structure for connecting to the water outlet pipe is also provided on the outer side of the rotating sleeve.

[0017] After adopting the above structure, the rotary joint of the present invention has at least the following beneficial effects:

[0018] 1. The sealing assembly is fixed by the upper shaft section and the lower annular limiting step on the inner core tube, and the sealing section and the upper annular limiting step on the rotating sleeve. There is no need to set a traditional sealing ring groove on the inner core tube, which reduces the production cost of the inner core tube.

[0019] 2. Specifically, the sealing assembly includes a lower limit ring, a spacer ring and at least two inner sealing rings. The two inner sealing rings are separated by the spacer ring so that a single inner sealing ring can achieve a better sealing effect.

[0020] 3. A clearance groove is provided at the bottom of the bead plate so that the lower corner of the clamping section will not interfere with the bead plate, making it easier to install the bead plate.

[0021] Compared with the prior art, the utility model does not need to provide a traditional sealing ring groove on the inner core tube, which makes production simpler and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1The utility model is a schematic cross-sectional structural diagram of a rotary joint.

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 3 This is a schematic diagram of the exploded structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the inner core tube, sealing assembly and bead plate.

[0026] Figure 5 It is a schematic diagram of the installation structure of the bead plate and the inner core tube.

[0027] Figure 6 It is a structural diagram of a rotary joint with two inner sealing rings.

[0028] In the picture:

[0029] Inner core tube 1; upper shaft section 11; lower annular limit step 12; annular groove 13; lower shaft section 14; snap-fit section 15; bead plate 16; gear hole 161; sink 162; air avoidance groove 163; external thread 17; rotating sleeve 2; sealing section 21; upper annular limit step 22; socket 23; axial limit block 231; marble 24; sealing assembly 3; lower limit ring 31; spacer ring 32; inner sealing ring 33. DETAILED DESCRIPTION

[0030] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0031] like Figures 1 to 6 As shown, it is a rotary joint involved in the utility model, comprising an inner core tube 1, a rotating sleeve 2 and a sealing assembly 3, wherein the rotating sleeve 2 is coaxially rotatably sleeved on the outside of the inner core tube 1; an upper shaft section 11 is provided on the outer wall of the inner core tube 1, and the sealing assembly 3 is sleeved on the upper shaft section 11, and a lower annular limiting step 12 is connected to the lower part of the upper shaft section 11, and the lower part of the sealing assembly 3 abuts against the lower annular limiting step 12; a sealing section 21 is formed on the inner wall of the rotating sleeve 2, and the outer wall of the sealing assembly 3 abuts against the sealing section 21; an upper annular limiting step 22 is formed on the upper part of the sealing section 21, and the upper end of the sealing assembly 3 abuts against the upper annular limiting step 22.

[0032] In this way, the utility model relates to a rotary joint, which fixes the sealing assembly 3 through the upper shaft section 11 and the lower annular limit step 12 on the inner core tube 1, and the sealing section 21 and the upper annular limit step 22 on the rotating sleeve 2, without providing a traditional sealing ring groove on the inner core tube 1, thereby reducing the production cost of the inner core tube 1.

[0033] Preferably, the sealing assembly 3 includes a lower limit ring 31, a spacer ring 32 and at least two inner sealing rings 33; the lower portion of the lower limit ring 31 abuts against the lower annular limit step 12, and the upper end of the lower limit ring 31 abuts against the inner sealing ring 33; the spacer ring 32 is located between two adjacent inner sealing rings 33; the upper end of the inner sealing ring 33 abuts against the upper annular limit step 22. The two inner sealing rings 33 are separated by the spacer ring 32, so that a single inner sealing ring 33 can achieve a better sealing effect. Further, the number of the inner sealing rings 33 is two (such as Figure 6 as shown) or three (as shown Figure 1-4 As shown in FIG. 3 , the number of the spacer rings 32 is one less than the number of the inner sealing rings 33. Furthermore, the outer diameter of the spacer ring 32 is smaller than the outer diameter of the lower stop ring 31, and the outer diameter of the lower stop ring 31 is smaller than the outer diameter of the inner sealing ring 33. Both the lower stop ring 31 and the spacer ring 32 are made of plastic.

[0034] Preferably, an annular groove 13 is formed on the inner core tube 1 above the sealing assembly 3, and a socket 23 is formed on the rotating sleeve 2. An axial limiting block 231 is provided in the socket 23 and engages with the annular groove 13. The axial limiting block 231 cooperates with the annular groove 13 to ensure rotation between the rotating sleeve 2 and the inner core tube 1 while limiting axial movement between the rotating sleeve 2 and the inner core tube 1.

[0035] Preferably, the inner core tube 1 is further formed with a lower shaft section 14, a clamping section 15 being formed at the lower portion of the lower shaft section 14, a bead plate 16 being fixedly mounted on the clamping section 15, and a plurality of gear holes 161 being formed in an annular arrangement on the bead plate 16; the rotating sleeve 2 is provided with marbles 24, which can be embedded in the gear holes 161. By selectively embedding the marbles 24 in the gear holes 161, the rotating sleeve 2 has a gear sense and can emit a "clicking" sound during rotation.

[0036] Furthermore, the engaging section 15 is polygonal in shape, such as a square or hexagon. The engaging section 15 may also be other non-circular shapes to prevent the bead plate 16 and the engaging section 15 from rotating. A recessed groove 162, identical in shape to the engaging section 15, is formed within the bead plate 16. A clearance groove 163 is provided below the recessed groove 162. The clearance groove 163 is provided at the bottom of the bead plate 16 to prevent the lower corners of the engaging section 15 from interfering with the bead plate 16, facilitating installation of the bead plate 16.

[0037] Preferably, the inner core tube 1 is made of metal, and an external thread 17 is provided at the lower part of the inner core tube 1; preferably, the rotating sleeve 2 is made of plastic, and an outer sealing ring (not shown in the figure) is provided on the outside of the rotating sleeve 2, and a connecting structure for connecting to the water outlet pipe is also provided on the outside of the rotating sleeve 2.

[0038] Compared with the prior art, the present invention does not need to provide a traditional sealing ring groove on the inner core tube 1, which makes production simpler and reduces production costs.

[0039] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A rotary joint, characterized in that: It includes an inner core tube, a rotating sleeve and a sealing assembly, wherein the rotating sleeve is coaxially rotatable on the outside of the inner core tube; an upper shaft section is provided on the outer wall of the inner core tube, and the sealing assembly is sleeved on the upper shaft section, and a lower annular limiting step is connected to the lower part of the upper shaft section, and the lower part of the sealing assembly abuts against the lower annular limiting step; a sealing section is formed on the inner wall of the rotating sleeve, and the outer wall of the sealing assembly abuts against the sealing section; an upper annular limiting step is formed on the upper part of the sealing section, and the upper end of the sealing assembly abuts against the upper annular limiting step.

2. A rotary joint according to claim 1, characterized in that: The sealing assembly includes a lower limit ring, a spacer ring and at least two inner sealing rings; the lower part of the lower limit ring abuts on the lower annular limit step, and the upper end of the lower limit ring abuts on the inner sealing ring; the spacer ring is located between two adjacent inner sealing rings; the upper end of the inner sealing ring abuts on the upper annular limit step.

3. A rotary joint according to claim 2, characterized in that: The outer diameter of the spacer ring is smaller than the outer diameter of the lower limiting ring, and the outer diameter of the lower limiting ring is smaller than the outer diameter of the inner sealing ring.

4. A rotary joint according to claim 2, characterized in that: The number of the inner sealing rings is two or three, and the number of the spacer rings is one less than the number of the inner sealing rings.

5. A rotary joint according to claim 2, characterized in that: The lower limit ring and the spacer ring are both made of plastic.

6. A rotary joint according to claim 1, characterized in that: An annular groove is formed on the inner core tube above the sealing component, and a socket is formed on the rotating sleeve. An axial limiting block engaged with the annular groove is provided in the socket.

7. A rotary joint according to claim 1, characterized in that: A lower shaft section is also formed on the inner core tube, and a clamping section is formed at the lower part of the lower shaft section. A bead plate is fixed on the clamping section, and a plurality of gear holes distributed in a ring are formed on the bead plate; marbles are provided on the rotating sleeve, and the marbles can be embedded in the gear holes.

8. A rotary joint according to claim 7, characterized in that: The clamping section is polygonal in shape; a sinking groove with the same shape as the clamping section is formed in the bead plate, and a space-avoiding groove is provided at the lower part of the sinking groove.

9. A rotary joint according to claim 1, characterized in that: The inner core tube is made of metal material, and the lower part of the inner core tube is provided with an external thread.

10. A rotary joint according to claim 1, characterized in that: The rotating sleeve is made of plastic material, an outer sealing ring is provided on the outer side of the rotating sleeve, and a connecting structure for connecting with a water outlet pipe is also provided on the outer side of the rotating sleeve.

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