Rotary joint and worktable using the same

1. A rotary joint comprising:

an input member defining a through hole extending along a vertical axis of the input member, the input member having a plurality of mounting portions circumferentially protruding from an outer surface of the input member, each two adjacent of the plurality of mounting portions forming a first receiving groove, and a plurality of transmission holes defined in one end surface of the input member around the through hole, an opening of each of the plurality of transmission holes away from the end surface of the input member formed in a sidewall of the first receiving groove; and

an output member rotatably sleeved on the input member, wherein sidewalls of the first receiving groove and an inner wall of the output member cooperatively form a channel, a plurality of outlets is defined in the inner wall of the output member, each outlet is communicating with corresponding one channel and extends through an outer wall of the output member.

2. The rotary joint of claim 1 , further comprising a plurality of sealing members, each of the plurality of sealing members is mounted on a corresponding one mounting portion, each of the plurality of sealing members is located between the inner wall of the output member and the outer wall of the input member.

3. The rotary joint of claim 2 , wherein a mounting groove is defined in each of the plurality of mounting portions, and each of the plurality of sealing members is mounted in and received in one mounting groove.

4. The rotary joint of claim 1 , wherein a plurality of second receiving grooves are recessed in the inner wall of the output member, each of the plurality of second receiving grooves are arranged with a corresponding one first receiving groove, and each channel is cooperatively formed by the sidewalls of the one first receiving groove and a corresponding one second receiving groove.

5. The rotary joint of claim 1 , further comprising an upper cover and a bottom cover, the upper cover is fixed with a first end portion of the output member, and the bottom cover is fixedly located at a second end portion of the output member, and the input member protrudes from the bottom cover.

6. The rotary joint of claim 1 , further comprising two bearings sleeved on the input member, each of the two bearings is located at one end portion of the input member and positioned between the output member and the input member.

7. The rotary joint of claim 1 , wherein each of the plurality of transmission holes comprises a first transmission segment and a second transmission segment connected to the first transmission segment, the first transmission segment extends from the end surface along a direction parallel to the vertical axis of the input member, and the second transmission segment substantially perpendicularly extends from the first transmission segment, the opening is formed in the second transmission segment away from the first transmission segment.

8. A rotary joint comprising:

an input member defining a through hole extending along a vertical axis of the input member;

an output member rotatably sleeved on the input member; and

a plurality of sealing members sleeved on the input member, the plurality of sealing members located between the output member and the input member to form a plurality of hermetical channels enclosing by the output member, the input member and two adjacent sealing members,

wherein a plurality of transmission holes is defined in an end surface of the input member, an opening of each of the plurality of transmission holes is positioned on an outer wall of input member and is communicating with corresponding one channel, a plurality of outlets is defined in the output member, each outlet extends through an outer wall of the output member and is communicating with a corresponding channel.

9. The rotary joint of claim 8 , further comprising an upper cover and a bottom cover, the upper cover is fixed with a first end portion of the output member, and the bottom cover is fixedly located at a second end portion of the output member, and the input member protrudes from the bottom cover.

10. The rotary joint of claim 8 , further comprising two bearings sleeved on the input member, each of the two bearings is located at one end portion of the input member and positioned between the output member and the input member.

11. The rotary joint of claim 8 , wherein each of the plurality of transmission holes comprises a first transmission segment and a second transmission segment communicating with the first transmission segment, the first transmission segment extends from the end surface along a direction parallel to the vertical axis of the input member, and the second transmission segment substantially perpendicularly extends from the first transmission segment, each opening is formed in one second transmission segment away from a respective first transmission segment.

12. A worktable comprising:

a support;

a rotary member rotatably positioned on the support;

a plurality of workstations fixed on the rotary member; and

a rotary joint comprising:

an input member defining a through hole extending along a vertical axis of the input member; and

an output member rotatably sleeved on the input member, wherein a plurality of receiving grooves are formed in an outer wall of the input member or an inner wall of the output member, such that a plurality of channels are formed between the output member and the input member, a plurality of transmission holes are defined in one end surface of the input member, each of the plurality of transmission holes communicating with corresponding one channel, a plurality of outlets is defined in the inner wall of the output member communicating with corresponding one channel; and

a plurality of transmitting conduits communicating with the plurality of outlets.

13. The worktable of claim 12 , wherein a plurality of mounting portions protrudes from the outer surface of the input member, one first receiving groove is defined by each two adjacent mounting portion and the outer surface of the input member, and a plurality of second receiving grooves are formed, each one channel is formed by sidewalls of one first receiving groove and corresponding one second receiving groove.

14. The worktable of claim 13 , wherein a plurality of sealing members, each of the plurality of sealing members is mounted on a corresponding one mounting portion and located between the inner wall of the output member and the outer wall of the input member.

15. The worktable of claim 14 , wherein a mounting groove is defined in each of the plurality of mounting portions, and each of the plurality of sealing members is mounted in and received in the mounting groove.

16. The worktable of claim 12 , further comprising an upper cover and a bottom cover, the upper cover is fixed with a first end portion of the output member, and the bottom cover is fixedly located at a second end portion of the output member, and the input member protrudes from the bottom cover, and the bottom cover is positioned adjacent to the support.

17. The worktable of claim 12 , further comprising two bearings sleeved on the input member, each of the two bearings is located at one end portion of the input member and positioned between the output member and the input member.

18. The worktable of claim 17 , wherein each of the plurality of transmission holes comprises a first transmission segment and a second transmission segment communicating with the first transmission segment, the first transmission segment extends from the end surface along a direction parallel to the vertical axis of the input member, and the second transmission segment substantially perpendicularly extends from the first transmission segment, each opening is formed in one second transmission segment away from corresponding one first transmission segment.