CN111193161A - Rotary joint and workbench with same - Google Patents

Abstract

The invention provides a rotary joint and a workbench with the same, wherein the rotary joint comprises a shell, a rotary core, a fluid introducing structure and a circuit introducing structure, wherein the rotary core is rotatably arranged in the shell; the fluid introducing structure comprises a fluid introducing channel arranged on the rotary core and the shell so as to realize fluid introduction through the fluid introducing structure; the circuit leading-in structure comprises an external wiring terminal arranged on the shell and an internal wiring terminal arranged on the rotating core, wherein the internal wiring terminal is used for being connected with the connecting wire so as to realize the electric connection between the external wiring terminal and the connecting wire through the matching between the external wiring terminal and the internal wiring terminal; fluid introduction and circuit introduction can be ensured even when the rotary core is rotated relative to the housing.

Description

Rotary joint and workbench with same

Technical Field

The invention relates to the field of machine tool equipment, in particular to a rotary joint and a workbench with the same.

Background

At present, in the milling process in the prior art, because the vertical milling head and the horizontal milling head are respectively located in different numerical control machines, that is, the vertical milling and the horizontal milling are respectively realized by adopting different numerical control machines, it is obvious that the processing efficiency of the milling process is low.

In addition, if the vertical milling head and the horizontal milling head are centralized in one numerical control machining center, the vertical milling head and the horizontal milling head of the numerical control machining center can independently move along respective rotating shafts, so that the vertical milling and the horizontal milling can be simultaneously realized on the same numerical control machine tool, and the milling efficiency and the machining precision are improved.

However, the workbench in the prior art usually has only one processing station, and cannot be respectively matched with a vertical milling head and a horizontal milling head to work in the same numerical control processing center; if a plurality of processing stations are arranged on one workbench to ensure the milling efficiency and the processing precision, the processing stations on the plurality of processing stations need to be arranged in a rotating way to enable each processing station to be in a vertical milling position or a horizontal milling position, so that the vertical milling head or the horizontal milling head can process the workpiece on the corresponding processing station. However, with regard to the processing table arranged in a rotating way, the conventional air flow introducing way and the conventional circuit introducing way have the problem of line winding during the rotating process of the processing table, which is not beneficial to the normal operation of the processing table, so the processing table arranged in a rotating way in the prior art has the problems of air flow introducing and circuit introducing.

Disclosure of Invention

The invention mainly aims to provide a rotary joint and a workbench with the same, and aims to solve the problem that fluid introduction and circuit introduction are difficult to realize in the workbench with a processing table arranged in a rotating mode.

In order to achieve the above object, according to one aspect of the present invention, there is provided a rotary joint comprising: a housing; the rotating core is rotatably arranged in the shell; a fluid introduction structure including fluid introduction passages provided on the rotary core and the housing to enable fluid introduction through the fluid introduction structure; the circuit introduces the structure, and the circuit introduces the structure including setting up the outside terminal on the casing and setting up the inside terminal on rotatory core, and inside terminal is used for being connected with the connecting wire to realize the electricity between outside terminal and the connecting wire through the cooperation between outside terminal and the inside terminal.

Further, the fluid introduction passage includes a first passage section, a second passage section, and a transition groove, the first passage section being provided on the housing, the second passage section being provided on the rotary core; the transition groove is arranged on the outer surface of the rotary core and arranged around the rotary axis of the rotary core, and the transition groove is communicated with the first channel section and the second channel section so as to keep the first channel section and the second channel section communicated in the rotating process of the rotary core.

Further, the fluid introducing structure further includes: a fluid inlet fitting disposed on the housing and in communication with the first channel section; and the fluid leading-out joint is arranged on the rotary core and is communicated with the second channel section.

Further, the first channel section extends in a direction perpendicular to the axis of rotation of the rotary core; the second channel section comprises a first branch and a second branch which are communicated with each other, the first branch is used for being communicated with the transition groove, the extending direction of the first branch is perpendicular to the rotating axis of the rotating core, and the extending direction of the second branch is parallel to the rotating axis of the rotating core.

Further, the fluid introduction structure is plural, and the transition grooves of the plural fluid introduction structures are arranged at intervals along the rotation axis of the rotary core.

Further, rotary joint still includes a plurality of sealing washers, and a plurality of sealing washers all press from both sides and establish between casing and rotatory core, are provided with at least one sealing washer between two adjacent transition grooves.

Furthermore, the circuit introducing structure further comprises a conducting ring, the conducting ring is arranged on the rotating core and connected with the internal wiring terminal, the conducting ring is arranged around the rotating axis of the rotating core, and the external wiring terminal is electrically connected with the internal wiring terminal through the conducting ring.

Further, the external binding post is provided with a brush, and the external binding post is in contact with the conductive ring through the brush.

Further, the circuit introducing structure is plural, and the plural circuit introducing structures are arranged at intervals along the rotation axis of the rotary core; and a spacing ring is clamped between the conducting rings of two adjacent circuit leading-in structures.

Furthermore, a mounting groove is formed in the rotating core, the conducting ring is arranged in the mounting groove, and a spacer bush is clamped between the conducting ring and the mounting groove.

Furthermore, a yielding cavity is formed in the rotating core, the first end of the internal wiring terminal is located in the yielding cavity, and the second end of the internal wiring terminal penetrates through the cavity wall of the yielding cavity and then is connected with the conducting ring.

Further, the housing includes a housing main body and a rear cover portion, which are arranged along the rotation axis of the rotary core; the fluid introducing structure is arranged corresponding to the shell main body, and the circuit introducing structure is arranged corresponding to the rear cover part.

According to another aspect of the present invention, there is provided a workbench, comprising a processing table assembly, a spindle, a connecting line and the above-mentioned rotary joint, wherein the spindle is rotatably disposed, and the processing table assembly and the rotary core of the rotary joint are both connected with the spindle, so that the spindle drives the processing table assembly and the rotary core to rotate; the fluid introduction structure of the rotary joint is connected with the processing table assembly so as to introduce fluid to the processing table assembly through the fluid introduction structure; two ends of the connecting wire are respectively connected with the internal wiring terminal of the circuit leading-in structure of the rotary joint and the processing table component so as to realize the electric connection between the processing table component and the circuit leading-in structure.

By applying the technical scheme of the invention, the rotary joint comprises a shell, a rotary core, a fluid introducing structure and a circuit introducing structure, wherein the rotary core is rotatably arranged in the shell; the fluid introduction and the circuit introduction are realized through a fluid introduction structure and a circuit introduction structure; wherein the fluid introduction structure comprises fluid introduction channels provided on the rotary core and the housing to enable fluid introduction through the fluid introduction structure; the circuit leading-in structure comprises an external wiring terminal arranged on the shell and an internal wiring terminal arranged on the rotating core, wherein the internal wiring terminal is used for being connected with the connecting wire so as to realize the electric connection between the external wiring terminal and the connecting wire through the matching between the external wiring terminal and the internal wiring terminal; when the rotary core rotates relative to the shell, the fluid introduction and the circuit introduction can be ensured; the rotary joint is applied to a workbench with a processing table which is arranged in a rotating way, so that a rotary core of the rotary joint and the processing table which is arranged in the rotating way can rotate synchronously, and even if the processing table of the workbench is in the rotating process, the fluid introduction and the circuit introduction of the processing table can be ensured, and the processing operation of the processing table can be further ensured; it can be seen that the problem of difficult fluid and circuit introduction in a table having a processing table rotatably disposed can be solved by using a rotary joint.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic view of the internal structure of an alternative rotary joint according to the invention;

FIG. 2 shows a schematic structural view of an alternative work table according to the present invention;

fig. 3 shows a schematic view of the structure of the rotary joint and the spindle of the workbench in fig. 2.

Wherein the figures include the following reference numerals:

100. a rotary joint;

10. rotating the core; 11. a yielding cavity;

21. a first channel segment; 22. a second channel segment; 221. a first branch; 223. a second branch circuit; 23. a transition groove; 24. a fluid introduction fitting; 25. a fluid outlet connection;

30. a seal ring;

40. a housing; 41. a housing main body; 42. a rear cover portion; 43. a first bearing; 44. a second bearing;

51. a cable; 511. a connecting wire; 52. an internal terminal; 53. conducting rings; 54. a spacer sleeve; 55. an external terminal; 56. an electric brush; 57. briquetting; 58. a spacer ring;

200. a work table; 210. a main shaft; 220. a processing table assembly; 230. an intermediate joint; 240. and a support table.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present invention provides a rotary joint 100, please refer to fig. 1, the rotary joint 100 includes a housing 40, a rotary core 10, a fluid introducing structure and a circuit introducing structure, the rotary core 10 is rotatably disposed in the housing 40; the fluid introduction structure includes fluid introduction passages provided on the rotary core 10 and the housing 40 to enable fluid introduction through the fluid introduction structure; the circuit introducing structure includes an external post 55 provided on the housing 40 and an internal post 52 provided on the rotary core 10, the internal post 52 being for connection with the connection line 511 to achieve electrical connection between the external post 55 and the connection line 511 by cooperation between the external post 55 and the internal post 52.

In the rotary joint 100 of the present invention, which comprises a housing 40 and a rotary core 10 rotatably provided in the housing 40, fluid introduction and circuit introduction are achieved by a fluid introduction structure and a circuit introduction structure; wherein the fluid introduction structure includes fluid introduction passages provided on the rotary core 10 and the housing 40 to enable fluid introduction through the fluid introduction structure; the circuit introducing structure comprises an external terminal 55 arranged on the shell 40 and an internal terminal 52 arranged on the rotary core 10, wherein the internal terminal 52 is used for being connected with the connecting wire 511 so as to realize the electric connection between the external terminal 55 and the connecting wire 511 through the matching between the external terminal 55 and the internal terminal 52; fluid introduction and circuit introduction can be ensured even when the rotary core 10 is rotated relative to the housing 40; the rotary joint 100 is applied to a workbench with a processing table which is arranged in a rotating way, so that the rotary core 10 of the rotary joint 100 can rotate synchronously with the processing table which is arranged in the rotating way, and even if the processing table of the workbench is in the rotating process, the fluid introduction and the circuit introduction of the processing table can be ensured, and the processing operation of the processing table can be further ensured; it can be seen that the problem of difficulty in fluid introduction and circuit introduction of a table having a processing table rotatably disposed can be solved by using the rotary joint 100.

Wherein at least a portion of the external terminal 55 is located outside of the housing 40 for connection with an external power source.

In the present embodiment, the fluid introduction passage includes a first passage section 21, a second passage section 22, and a transition groove 23, the first passage section 21 being provided on the housing 40, the second passage section 22 being provided on the rotary core 10; a transition groove 23 is provided on an outer surface of the rotary core 10 and around the rotation axis of the rotary core 10, the transition groove 23 communicating with both the first passage section 21 and the second passage section 22 to maintain the communication between the first passage section 21 and the second passage section 22 during the rotation of the rotary core 10. Specifically, the rotary core 10 has a cylindrical structure, and the transition groove 23 is an annular groove opened on the outer surface of the rotary core 10.

In the present embodiment, the fluid introduction structure further includes a fluid introduction joint 24 and a fluid lead-out joint 25, the fluid introduction joint 24 is provided on the housing 40 and communicates with the first channel section 21, and the fluid lead-out joint 25 is provided on the rotary core 10 and communicates with the second channel section 22, so that the fluid is introduced into the rotary joint 100 through the fluid introduction joint 24, the first channel section 21, the transition groove 23, the second channel section 22, and the fluid lead-out joint 25 in this order.

Specifically, the first channel section 21 is a cylindrical hole opened on the housing 40, and a first end of the cylindrical hole penetrates through the inner wall of the housing 40, so that the first end of the cylindrical hole is communicated with the annular groove opened on the outer surface of the rotary core 10, and further the first channel section 21 is communicated with the transition groove 23; the second end of the cylindrical bore extends through the outer wall of the housing 40 such that at least a portion of the fluid inlet fitting 24 is inserted within the cylindrical bore and communicates with the second end of the cylindrical bore, thereby providing communication between the first channel section 21 and the fluid inlet fitting 24.

In particular, the first channel section 21 extends in a direction perpendicular to the axis of rotation of the rotary core 10.

Specifically, the second channel section 22 includes a first branch 221 and a second branch 223 in communication with each other, the first branch 221 for communicating with the transition groove 23, and the second branch 223 for communicating with the fluid outlet joint 25.

The first branch 221 is a groove structure arranged in the rotary core 10, the second branch 223 is a cylindrical groove arranged on one end face in the rotary core 10, the groove structure arranged in the rotary core 10 is communicated with an annular groove arranged on the outer surface of the rotary core 10 and the cylindrical groove arranged on one end face in the rotary core 10, so that the first branch 221 is communicated with the second branch 223 and the transition groove 23; at least part of the fluid outlet connection 25 is inserted in the cylindrical groove to allow the second branch 223 to communicate with the fluid outlet connection 25. Optionally, the first branch 221 is a strip-shaped groove structure.

Specifically, the first branch 221 extends in a direction perpendicular to the rotation axis of the rotary core 10, and the second branch 223 extends in a direction parallel to the rotation axis of the rotary core 10.

Alternatively, the fluid introduction structure is plural, and the transition grooves 23 of the plural fluid introduction structures are arranged at intervals along the rotation axis of the rotary core 10; the first channel segments 21 of the plurality of fluid introduction structures are arranged at intervals along the rotation axis of the rotary core 10; the second branches 223 of the second channel segments 22 of the plurality of fluid introduction structures are spaced about the axis of rotation of the rotary core 10.

In this embodiment, the rotary joint 100 further includes a plurality of seal rings 30, the plurality of seal rings 30 are all interposed between the housing 40 and the rotary core 10, and at least one seal ring 30 is disposed between two adjacent transition grooves 23 to ensure the sealing effect of each fluid introduction passage. Optionally, each sealing ring 30 is an annular sealing ring, and each annular sealing ring is sleeved on the rotating core 10.

In the present embodiment, the circuit introducing structure further includes a conductive ring 53, the conductive ring 53 is disposed on the rotary core 10 and connected to the internal post 52, the conductive ring 53 is disposed around the rotation axis of the rotary core 10, and the external post 55 is electrically connected to the internal post 52 through the conductive ring 53. Since the conductive ring 53 has a ring structure, the internal terminal 52 disposed on the rotary core 10 can be electrically connected to the conductive ring 53 during the rotation of the rotary core 10 relative to the housing 40.

In order to make the structure of the rotary joint 100 more compact, the rotary core 10 is provided with a mounting groove for receiving the conductive ring 53, and the conductive ring 53 is disposed in the mounting groove. Specifically, the mounting groove is an annular structure, and is provided on the outer peripheral surface of the rotary core 10 around the rotation axis of the rotary core 10.

Optionally, a spacer 54 is sandwiched between the conductive ring 53 and the mounting groove to prevent electrical leakage. Specifically, the spacer 54 is an annular sleeve that is fitted over the mounting groove outside the rotary core 10; spacer 54 is made of an insulating material.

In the present embodiment, the external terminal 55 is provided with a brush 56, and the external terminal 55 is in contact with the conductive ring 53 through the brush 56.

In a specific implementation, the housing 40 is provided with a receiving groove, the receiving groove accommodates a pressing block 57, at least a portion of the brush 56 is inserted into the receiving groove, and the pressing block 57 is pressed on the brush 56 to keep the brush 56 in contact with the conductive ring 53. Alternatively, a receiving groove is opened on the outer circumferential surface of the housing 40, the receiving groove being opposed to the position of the mounting groove.

Alternatively, the circuit introducing structure is plural, and the plural circuit introducing structures are arranged at intervals along the rotation axis of the rotary core 10.

Specifically, the conductive rings 53 of the plurality of circuit introducing structures are all disposed in the mounting groove, the conductive rings 53 of the plurality of circuit introducing structures are arranged at intervals along the rotation axis of the rotary core 10, and a spacer ring 58 is interposed between the conductive rings 53 of two adjacent circuit introducing structures to prevent contact between the two adjacent conductive rings 53; the spacer ring 58 is made of an insulating material. Alternatively, the mounting grooves are made plural, the conductive rings 53 of the plurality of circuit introducing structures are provided in the plural mounting grooves in one-to-one correspondence, and the plural mounting grooves are arranged at intervals along the rotation axis of the rotary core 10, so that the conductive rings 53 of the plurality of circuit introducing structures are arranged at intervals along the rotation axis of the rotary core 10.

Specifically, the pressing pieces 57 are plural, and the plural pressing pieces 57 are provided in one-to-one correspondence with the brushes 56 of the plural circuit lead-in structures, so that the respective pressing pieces 57 are pressed against the corresponding brushes 56. The external terminals 55 of the plurality of circuit introducing structures are arranged at intervals along the rotation axis of the rotary core 10, the brushes 56 of the plurality of circuit introducing structures are arranged at intervals along the rotation axis of the rotary core 10, and the press blocks 57 are arranged at intervals along the rotation axis of the rotary core 10. Alternatively, the plurality of press pieces 57 and the plurality of brushes 56 of the circuit introducing structure are both provided in the accommodation groove; alternatively, the housing groove is plural, and the plurality of press pieces 57 are provided in the plurality of housing grooves in one-to-one correspondence, that is, the brushes 56 of the plurality of circuit introducing structures are provided in the plurality of housing grooves in one-to-one correspondence, and the plurality of housing grooves are provided at intervals along the rotation axis of the rotary core 10.

In this embodiment, the rotation core 10 is provided with a yielding cavity 11, a first end of the internal terminal 52 is located in the yielding cavity 11 and connected to the connection line 511, and a second end of the internal terminal 52 passes through the cavity wall of the yielding cavity 11 and then is connected to the conductive ring 53.

Specifically, the avoiding cavity 11 is a central through hole opened inside the rotary core 10, and the connecting wire 511 is inserted into the central through hole. The plurality of connection lines 511 are connected to the plurality of internal terminals 52 of the circuit lead-in structure in a one-to-one correspondence, and the plurality of connection lines 511 are bundled together to form the cable 51.

In the present embodiment, the housing 40 includes a housing main body 41 and a rear cover portion 42, the housing main body 41 and the rear cover portion 42 being arranged along the rotational axis of the rotary core 10; the fluid introducing structure is provided corresponding to the case main body 41, and the circuit introducing structure is provided corresponding to the rear cover portion 42.

Specifically, the rotary core 10 includes a first core section and a second core section, the case main body 41 is sleeved outside the first core section of the rotary core 10, and a first bearing 43 is interposed between the case main body 41 and the first core section, so that the rotary core 10 can rotate relative to the case main body 41; the first passage section 21 is provided on the case main body 41, and the second passage section 22 and the transition groove 23 are located on the first core section of the rotary core 10.

The rear cover portion 42 is sleeved outside the second core body section of the rotary core 10, and a second bearing 44 is clamped between the rear cover portion 42 and the second core body section, so that the rotary core 10 can rotate relative to the rear cover portion 42; receiving grooves for receiving the pressure blocks 57 and the brushes 56 are provided on the back cover portion 42, and mounting grooves for receiving the conductive rings 53 and the internal terminals 52 are located on the second core section of the rotary core 10.

The present invention further provides a workbench 200, as shown in fig. 2 and fig. 3, the workbench includes a processing table assembly 220, a spindle 210, a connecting line 511 and the above-mentioned rotary joint 100, the spindle 210 is rotatably disposed, the processing table assembly 220 and the rotary core 10 of the rotary joint 100 are both connected with the spindle 210, so that the spindle 210 drives the processing table assembly 220 and the rotary core 10 to rotate; the fluid introduction structure of the rotary joint 100 is connected to the table assembly 220 to introduce the fluid to the table assembly 220 through the fluid introduction structure; both ends of the connection wire 511 are connected to the internal post 52 of the circuit lead-in structure of the rotary joint 100 and the processing table assembly 220, respectively, to achieve electrical connection between the processing table assembly 220 and the circuit lead-in structure.

Alternatively, the processing table assembly 220 of the work table 200 is plural, the fluid introduction structure is plural, and the plural fluid introduction structures are provided in one-to-one correspondence with the plural processing table assemblies 220 and connected to introduce the fluid to the respective processing table assemblies 220 through the respective fluid introduction structures. The circuit introducing structures are multiple, and the multiple circuit introducing structures are arranged in one-to-one correspondence with the multiple processing table assemblies 220; the plurality of connecting lines 511 are arranged between the corresponding circuit leading-in structures and the processing table assemblies 220 in a one-to-one correspondence manner, so that each processing table assembly 220 is connected with the internal binding post 52 of the corresponding circuit leading-in structure through the corresponding connecting line 511, and further, the electric connection between each processing table assembly 220 and the corresponding circuit leading-in structure is realized; namely, the rotary joint 100 is applied to a workbench having a plurality of processing stations, and it is also possible to ensure fluid introduction and circuit introduction of each processing station assembly 220 when the processing station assemblies 220 on the plurality of processing stations are in a rotating state, thereby achieving fluid introduction and circuit introduction of the workbench having the plurality of processing stations, and solving a problem that the workbench having the plurality of processing stations is difficult to achieve fluid introduction and circuit introduction.

Specifically, the worktable 200 includes a supporting table 240 connected to the spindle 210, so that the spindle 210 rotates the supporting table 240; the support table 240 includes a plurality of processing stations, which are disposed at intervals; the plurality of table assemblies 220 are disposed in one-to-one correspondence with the plurality of processing stations, and each table assembly 220 is rotatably disposed at a corresponding processing station.

Specifically, each of the machining station assemblies 220 includes a gripper assembly and a turntable to clamp a workpiece on the corresponding turntable by the gripper assembly. The clamping jaw assembly comprises a plurality of clamping jaws which are arranged at intervals, and each clamping jaw is movably arranged in a direction close to or far away from the corresponding rotary table so as to press the workpiece on the corresponding rotary table. Optionally, the clamping jaw is a cylinder clamping jaw, that is, the clamping jaw comprises a clamping member and a driving cylinder connected with the clamping member, so that the driving cylinder drives the clamping member to move in a direction close to or far from the corresponding turntable; a gas flow is introduced to the corresponding processing table assembly 220 through each fluid introduction structure to supply gas to the driving cylinders.

In this embodiment, the working table 200 further includes an intermediate joint 230, the intermediate joint 230 being disposed on the main shaft 210; alternatively, the intermediate joint 230 and the rotary joint 100 are located at both ends of the main shaft 210, respectively.

The intermediate joint 230 includes a plurality of fluid access heads and a plurality of fluid distribution heads, the plurality of fluid access heads and the plurality of fluid introduction structures are correspondingly arranged and connected one to one, and the plurality of fluid distribution heads and the plurality of fluid access heads are correspondingly arranged and communicated one to one; wherein each fluid distribution sub-assembly comprises a plurality of fluid branch sub-assemblies, each processing station assembly 220 comprises a plurality of gas-using components, and the plurality of gas-using components of each processing station assembly 220 are disposed in one-to-one correspondence with and connected to the plurality of fluid branch sub-assemblies of the corresponding fluid distribution sub-assembly to supply gas to the plurality of gas-using components of each processing station assembly 220.

The middle connector 230 includes a plurality of circuit access connectors and a plurality of circuit distribution connectors, the plurality of circuit access connectors and the plurality of circuit lead-in structures are correspondingly arranged and connected one by one, and the plurality of circuit distribution connectors and the plurality of circuit access connectors are correspondingly arranged and connected one by one; wherein each circuit distribution connector comprises a plurality of electrical branch connectors, each processing station assembly 220 comprises a plurality of electrical components, and the plurality of electrical components of each processing station assembly 220 are arranged and connected in one-to-one correspondence with the plurality of electrical branch connectors of the corresponding circuit distribution connector to supply power to the plurality of electrical components of each processing station assembly 220. Optionally, the plurality of electrical components include sensors for sensing whether a workpiece is gripped or held by the jaw assembly of the table assembly 220, and/or sensors for sensing a rotational state of the respective table assembly 220.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

in the rotary joint 100 of the present invention, the rotary joint 100 includes a housing 40, a rotary core 10, a fluid introducing structure, and a circuit introducing structure, the rotary core 10 being rotatably provided in the housing 40; the fluid introduction and the circuit introduction are realized through a fluid introduction structure and a circuit introduction structure; wherein the fluid introduction structure includes fluid introduction passages provided on the rotary core 10 and the housing 40 to enable fluid introduction through the fluid introduction structure; the circuit introducing structure comprises an external terminal 55 arranged on the shell 40 and an internal terminal 52 arranged on the rotary core 10, wherein the internal terminal 52 is used for being connected with the connecting wire 511 so as to realize the electric connection between the external terminal 55 and the connecting wire 511 through the matching between the external terminal 55 and the internal terminal 52; fluid introduction and circuit introduction can be ensured even when the rotary core 10 is rotated relative to the housing 40; the rotary joint 100 is applied to a workbench with a processing table which is arranged in a rotating way, so that the rotary core 10 of the rotary joint 100 can rotate synchronously with the processing table which is arranged in the rotating way, and even if the processing table of the workbench is in the rotating process, the fluid introduction and the circuit introduction of the processing table can be ensured, and the processing operation of the processing table can be further ensured; it can be seen that the problem of difficulty in fluid introduction and circuit introduction of a table having a processing table rotatably disposed can be solved by using the rotary joint 100.

The work table 200 of the present invention includes the rotary joint 100 described above, and thus the work table 200 has at least the same technical effects as the rotary joint 100.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A swivel joint, comprising:

a housing (40);

a rotary core (10), the rotary core (10) being rotatably disposed within the housing (40);

a fluid introduction structure including fluid introduction passages provided on the rotary core (10) and the housing (40) to enable fluid introduction therethrough;

the circuit introducing structure comprises an external terminal (55) arranged on the shell (40) and an internal terminal (52) arranged on the rotary core (10), wherein the internal terminal (52) is used for being connected with a connecting wire (511) so as to realize the electric connection between the external terminal (55) and the connecting wire (511) through the matching between the external terminal (55) and the internal terminal (52).

2. The rotary joint according to claim 1, wherein the fluid introduction passage includes a first passage section (21), a second passage section (22), and a transition groove (23), the first passage section (21) being provided on the housing (40), the second passage section (22) being provided on the rotary core (10);

the transition groove (23) is provided on an outer surface of the rotary core (10) and around a rotation axis of the rotary core (10), and the transition groove (23) communicates with both the first passage section (21) and the second passage section (22) to keep the first passage section (21) and the second passage section (22) in communication during rotation of the rotary core (10).

3. The rotary joint according to claim 2, wherein the fluid introduction structure further comprises:

a fluid inlet fitting (24), said fluid inlet fitting (24) being disposed on said housing (40) and communicating with said first channel section (21);

a fluid outlet connection (25), the fluid outlet connection (25) being arranged in the rotary core (10) and communicating with the second channel section (22).

4. A swivel joint according to claim 2, characterized in that the first channel section (21) extends in a direction perpendicular to the axis of rotation of the swivel core (10);

the second channel section (22) comprises a first branch (221) and a second branch (223) which are communicated with each other, the first branch (221) is used for being communicated with the transition groove (23), the extending direction of the first branch (221) is perpendicular to the rotating axis of the rotating core (10), and the extending direction of the second branch (223) is parallel to the rotating axis of the rotating core (10).

5. The rotary joint according to claim 2, wherein the fluid introduction structure is plural, and the transition grooves (23) of the plural fluid introduction structures are arranged at intervals along the rotation axis of the rotary core (10).

6. The rotary joint according to claim 5, further comprising a plurality of seal rings (30), wherein the plurality of seal rings (30) are each interposed between the housing (40) and the rotary core (10), and at least one seal ring (30) is disposed between adjacent two of the transition grooves (23).

7. The rotary joint of claim 1, wherein the circuit lead-in structure further comprises:

a conductive ring (53), the conductive ring (53) being disposed on the rotating core (10) and connected with the internal terminal (52), the conductive ring (53) being disposed around a rotation axis of the rotating core (10), the external terminal (55) being electrically connected with the internal terminal (52) through the conductive ring (53).

8. A rotary joint according to claim 7, characterized in that a brush (56) is provided on the external terminal (55), the external terminal (55) being in contact with the conductive ring (53) through the brush (56).

9. The rotary joint according to claim 7, wherein the circuit introducing structure is plural, and plural circuit introducing structures are arranged at intervals along the rotation axis of the rotary core (10); and a spacing ring (58) is clamped between the conducting rings (53) of two adjacent circuit leading-in structures.

10. The rotary joint according to claim 7, wherein a mounting groove is provided on the rotary core (10), the conductive ring (53) is disposed in the mounting groove, and a spacer (54) is interposed between the conductive ring (53) and the mounting groove.

11. The rotary joint according to claim 7, wherein a yield cavity (11) is provided on the rotary core (10), the first end of the internal terminal (52) is located in the yield cavity (11), and the second end of the internal terminal (52) passes through the cavity wall of the yield cavity (11) and then is connected to the conductive ring (53).

12. The rotary joint according to claim 1, wherein the housing (40) includes a housing main body (41) and a rear cover portion (42), the housing main body (41) and the rear cover portion (42) being arranged along a rotational axis of the rotary core (10); the fluid introducing structure is provided corresponding to the case main body (41), and the circuit introducing structure is provided corresponding to the rear cover portion (42).

13. A table, characterized in that it comprises a machining table assembly (220), a spindle (210), a connecting line (511) and a rotary joint according to any one of claims 1 to 12;

the spindle (210) is rotatably arranged, and the processing table assembly (220) and the rotating core (10) of the rotating joint are both connected with the spindle (210), so that the spindle (210) drives the processing table assembly (220) and the rotating core (10) to rotate;

the fluid introduction structure of the rotary joint is connected with the processing table assembly (220) to introduce fluid to the processing table assembly (220) through the fluid introduction structure;

two ends of the connecting wire (511) are respectively connected with an internal binding post (52) of a circuit leading-in structure of the rotary joint and the processing table assembly (220) so as to realize the electric connection between the processing table assembly (220) and the circuit leading-in structure.

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