CN217234768U

CN217234768U - Multi-channel rotary joint and vertical turntable

Info

Publication number: CN217234768U
Application number: CN202220540940.XU
Authority: CN
Inventors: 史本岩
Original assignee: Foshan Demate Intelligent Equipment Technology Co ltd
Current assignee: Foshan Demate Intelligent Equipment Technology Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-08-19
Anticipated expiration: 2032-03-11

Abstract

A multi-pass rotary joint and a vertical turntable, comprising: the fixed shaft is arranged at the center of the rotary table; the fixed shaft is provided with a first air inlet hole and a first air outlet hole; the rotating module is arranged on the table top of the rotary table; the rotating module is provided with an accommodating cavity, is arranged on a first shaft section at the top of the fixed shaft through the accommodating cavity and can rotate along the fixed shaft; the rotating module is provided with a first air path, and a cavity is formed between the accommodating cavity and the top end of the first shaft section; the cavity is used for keeping the first air outlet and the first air path in a communicated state at any rotation angle of the rotating module; the rotary joint and the rotary table of the utility model can independently disassemble the rotary part of the rotary joint without disassembling other part structures, thereby facilitating the maintenance or replacement of sealing elements; and the relative radial run-out of the seal and shaft in the rotary joint can be reduced by providing a bearing.

Description

Multi-channel rotary joint and vertical turntable

Technical Field

The utility model belongs to the technical field of directly drive revolving stage equipment, concretely relates to multichannel rotary joint and vertical revolving stage.

Background

The direct-drive rotary table mainly comprises a rotary table top and a motor for driving the rotary table top to rotate, wherein an air passage is formed in the rotary table top, and pneumatic equipment such as a pneumatic clamp or a vacuum chuck and the like mounted on the rotary table top is controlled through the air passage, so that the function of automatic clamping is realized.

However, the existing direct-drive rotary table has the problem of inconvenient installation in use, and after the sealing element of the rotary table top reaches the service life, the whole rotary table top needs to be disassembled, so that the sealing element can be replaced. It is inconvenient in the routine maintenance or replacement of the sealing element and requires a long time for disassembly and assembly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a multichannel rotary joint and vertical revolving stage to solve prior art's revolving stage and maintaining or replace sealing element comparatively inconvenient, required dismantlement and the longer problem of assemble duration.

The utility model discloses one of them embodiment provides a multichannel rotary joint, can be used to the revolving stage, include: the fixed shaft is arranged at the center of the rotary table; the fixed shaft is provided with a first air inlet hole and a first air outlet hole, and the first air inlet hole is communicated with the first air outlet hole; the rotating module is arranged on the table top of the rotary table; the rotating module is provided with an accommodating cavity, is arranged on a first shaft section at the top of the fixed shaft through the accommodating cavity and can rotate along the fixed shaft; the rotating module is provided with a first air path, and a cavity is formed between the accommodating cavity and the top end of the first shaft section; the cavity is used for enabling the first air outlet and the first air path to be kept in a communicated state at any rotation angle of the rotating module.

In one embodiment, the rotating module is further provided with a second air path; the second gas path is provided with a second gas path gas inlet and a second gas path gas outlet; the fixed shaft is also provided with a second air inlet hole and a second air outlet hole, and the second air inlet hole is communicated with the second air outlet hole; and a first annular airflow channel is arranged between the second air outlet and the second air path air inlet and is used for enabling the second air outlet and the second air path air inlet to be communicated at any rotation angle of the rotating module.

In one embodiment, the outer wall surface of the first shaft section of the fixing shaft is provided with a first annular groove, and the first annular groove is arranged around the first shaft section; the second air outlet hole is formed in the first annular groove; the first annular groove is used for forming the first annular airflow channel.

In one embodiment, the rotating module is further provided with a third air path; the third gas path is provided with a third gas path gas inlet and a third gas path gas outlet; the fixed shaft is also provided with a third air inlet and a third air outlet, and the third air inlet is communicated with the third air outlet; and a second annular air flow channel is arranged between the third air outlet and the third air path air inlet and is used for communicating the third air outlet and the third air path air inlet at any rotation angle of the rotating module.

In one embodiment, the outer wall surface of the first shaft section of the fixed shaft is provided with a second annular groove, the second annular groove is arranged around the first shaft section, and the second annular groove and the first annular groove are mutually spaced in the axial direction; the third air outlet hole is formed in the second annular groove; the second annular groove is used for forming the second annular airflow channel.

In one embodiment, the bottom of the fixed shaft is provided with a mounting seat for mounting and fixing the fixed shaft on the machine tool; the first air inlet hole is formed in the upper surface of the mounting seat, and the first air outlet hole is formed in the top surface of the first shaft section; the first air inlet hole is communicated with the first air outlet hole through a first air flow channel; the first gas channel comprises a first gas channel horizontal part and a first gas channel vertical part which are communicated; the horizontal part of the first air flow channel is communicated with the first air inlet hole; the vertical part of the first air flow channel is communicated with the first air outlet;

and/or the second air inlet hole is arranged on the upper surface of the mounting seat, and the second air outlet hole is arranged on the side wall surface of the first shaft section; the second air inlet hole is communicated with the second air outlet hole through a second air flow channel; the second air channel comprises a horizontal part and a vertical part which are communicated with each other; the horizontal part of the second air channel is communicated with a second air inlet hole; the vertical part of the second air channel is communicated with a second air outlet;

and/or a third air inlet hole is arranged on the upper surface of the mounting seat, and the third air outlet hole is arranged on the side wall surface of the first shaft section; the third air inlet and the third air outlet are communicated through a third air flow channel; the third air flow channel comprises a third air flow channel horizontal part and a third air flow channel vertical part which are communicated; the horizontal part of the third air channel is communicated with a third air inlet; and the vertical part of the third air flow channel is communicated with a third air outlet hole.

In one embodiment, the first gas flow channel horizontal portion, the second gas flow channel first horizontal portion and the third gas flow channel first horizontal portion are disposed at the same axial position within the mounting block;

and/or the first air flow channel vertical part, the second air flow channel vertical part and the third air flow channel vertical part are arranged in the fixed shaft at intervals in the radial direction.

In one embodiment, the rotating module comprises a rotating panel, a first ring block, a second ring block and a third ring block; the third ring block is provided with a screw which sequentially penetrates through the second ring block and the first ring block to be fixedly connected with the rotating panel; the circular holes at the inner sides of the first ring block, the second ring block and the third ring block and the containing circular hole below the rotating panel form the containing cavity; the depth of the accommodating cavity is greater than the length of the first shaft section;

and/or the fixed shaft is provided with a second shaft section, a bearing is arranged on the second shaft section, and an inner ring of the bearing is tightly attached and fixed with the outer wall surface of the second shaft section; the bearing is located below the rotating module, and an outer ring of the bearing and the rotating module rotate synchronously.

In one embodiment, a first annular gap is arranged on the side wall of the circular accommodating hole of the rotating panel, and the first annular gap is positioned on the contact surface of the rotating panel and the first ring block; a first movable sealing element is arranged between the inside of the first annular gap and the first shaft section and used for preventing gas in the cavity from leaking from the intersection of the rotating panel and the first shaft section;

and/or a second annular gap is arranged on the inner side wall of the first ring block and is positioned on the contact surface of the first ring block and the second ring block; a second dynamic sealing element is arranged between the inside of the second annular gap and the first shaft section and is used for preventing gas in the first annular gas flow channel from leaking;

and/or a third annular gap is arranged on the inner side wall of the second ring block and is positioned on the contact surface of the second ring block and the third ring block; and a third dynamic sealing element is arranged between the inside of the third annular gap and the first shaft section and used for preventing gas in the second annular gas flow channel from leaking.

In one embodiment, the second air passage in the rotary module comprises a second air passage horizontal part and a second air passage vertical part which are communicated with each other; the horizontal part of the second air path is communicated with the air inlet of the second air path; the vertical part of the second gas path is communicated with a gas outlet of the second gas path;

and/or the third gas path in the rotary module comprises a third gas path horizontal part and a third gas path vertical part which are communicated with each other; the third air path horizontal part is communicated with a third air path air inlet; and the vertical part of the third air path is communicated with the air outlet of the third air path.

In one embodiment, the present invention further includes a vertical turntable disposed on a machine tool, the vertical turntable including: a stator assembly; a rotor assembly rotatably disposed on the stator assembly; the rotor assembly has a rotating table top that is rotationally movable relative to the stator assembly; and the multi-channel rotary joint is detachably arranged on the rotary table top, and the multi-channel rotary joint is any one of the multi-channel rotary joints in the embodiments.

In one embodiment, the rotary table top is provided with a bearing surface and a mounting surface; a step accommodating channel is arranged at the center of the bearing surface and used for fixing a rotating module of the multi-channel rotating joint; the mounting surface is provided with a plurality of coaxially arranged annular accommodating grooves;

and/or the stator assembly comprises a shell, and the top of the stator assembly is provided with a plurality of annular convex blocks corresponding to the plurality of annular containing grooves;

and/or when the rotary table top is installed on the shell in a limiting mode, fit gaps are formed between the plurality of annular accommodating grooves and the plurality of annular convex blocks.

In one embodiment, the rotor assembly comprises a rotating main shaft and a plurality of permanent magnet units arranged on the outer wall surface of the rotating main shaft; the rotating main shaft is arranged around a fixed shaft in the multi-channel rotating joint; the permanent magnet units are arranged around the rotating main shaft;

and/or the stator assembly comprises a shell and a plurality of stator coils arranged on the inner wall surface of the shell; the plurality of stator coils are arranged around the plurality of permanent magnet units; when the plurality of stator coils are energized, a torque is generated between the plurality of stator coils and the plurality of permanent magnet units to cause the rotor assembly to rotate relative to the stator assembly.

In one embodiment, the method further comprises the following steps: the base is fixedly connected with the shell; the center of the bottom surface of the base is provided with a concave part, the concave part is used for accommodating the mounting seat of the fixed shaft, and the base is fixed with the fixed shaft; and the positioning ring block is fixedly arranged on the shell.

In one embodiment, the outer side of the shell is provided with an air supply hole which is communicated with one air supply channel; the gas supply channel comprises a first channel arranged on the shell, a second channel arranged in the positioning ring block and a third channel arranged on the base; and the air outlet end of the third channel is communicated with an air inlet hole on the mounting seat.

The utility model discloses the multichannel rotary joint and vertical revolving stage that above embodiment provided have following beneficial effect:

the fixed shaft of the utility model is fixed, wherein the rotary module makes synchronous rotary motion along with the table-board of the rotary table, after the air flow flows upwards from the bottom along the fixed shaft, the air flow can flow into the rotary module without obstacle and then flows out from the air path of the rotary module, and the pneumatic equipment arranged on the table-board of the rotary table is controlled by controlling the flow of different air paths; and after the sealing member of the rotary module reaches the service life or the rotary module is worn, the screw used for fixing the rotary module is unscrewed, the rotary module can be independently disassembled under the condition that other part structures are not required to be disassembled, the sealing member is convenient to maintain or replace, the required disassembling and assembling time is short, and the precision does not need to be debugged again after the disassembling and assembling.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 shows the overall structure diagram of the multi-way rotary joint of the present invention;

FIG. 2 is a schematic top view of the multi-way swivel of the present invention;

FIG. 3 is a schematic sectional view in the direction A-A in FIG. 2;

FIG. 4 is an enlarged view of the M portion of FIG. 3;

fig. 5 is a schematic front view of the multi-way rotary joint of the present invention;

FIG. 6 is a schematic sectional view in the direction B-B in FIG. 5;

FIG. 7 is a schematic cross-sectional view in the direction C-C in FIG. 5;

fig. 8 shows a schematic structural view of a fixing shaft according to the present invention;

FIG. 9 is a schematic cross-sectional view of the structure of FIG. 8 taken along the line D-D;

fig. 10 is a front view schematically illustrating the structure of the rotating module according to the present invention;

FIG. 11 is a schematic cross-sectional view in the direction E-E of FIG. 10;

figure 12 shows an exploded view of the rotating module of the present invention;

fig. 13 is a schematic axial view of a turntable according to the present invention;

fig. 14 is a schematic top view of a turntable according to the present invention;

FIG. 15 is a schematic sectional view in the F-F direction in FIG. 14;

FIG. 16 is a schematic sectional view showing the structure in the H-H direction in FIG. 14;

fig. 17 is a schematic structural view of the carrying surface of the rotary table of the present invention;

fig. 18 is a schematic structural view of the mounting surface of the rotary table of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-12, an embodiment of the present invention provides a multi-way rotary joint for a turntable, including: a fixed shaft 100 disposed at the center of the turntable; the fixed shaft 100 is provided with a first air inlet hole 131 and a first air outlet hole 132, and the first air inlet hole 131 is communicated with the first air outlet hole 132; the rotating module 200 is arranged on the table top of the turntable; the rotating module 200 has a receiving cavity 210, the rotating module 200 is disposed on the first shaft segment 110 at the top of the fixing shaft 100 through the receiving cavity 210, and the rotating module 200 can rotate along the fixing shaft 100; the rotating module 200 has a first air passage 220, and a cavity is formed between the accommodating cavity 210 and the top end of the first shaft section 110; the cavity is used for keeping the first air outlet 132 and the first air path 220 in a communication state at any rotation angle of the rotary module 200; the first air path 220 is disposed at the top of the accommodating cavity 210.

In this embodiment, the fixed shaft 100 is fixedly disposed, the rotary module 200 performs synchronous rotary motion along with the table top of the turntable, and after flowing out upwards along the fixed shaft 100 from the bottom, the airflow flows into the rotary module 200 without obstruction, and then flows out from the air channels of the rotary module 200, so as to control the pneumatic equipment mounted on the table top of the turntable by controlling the flow of different air channels; after the seal of the rotary module 200 reaches the service life or the rotary module 200 is worn out, the rotary module 200 can be detached alone without disassembling other part structures by unscrewing the screws for fixing the rotary module 200, facilitating maintenance or replacement of the seal.

By arranging the first air inlet hole 131 and the first air outlet hole 132 on the fixing shaft 100, a first air flow channel 130 is formed between the first air inlet hole 131 and the first air outlet hole 132 which are communicated with each other, so that air flows upwards through an air flow channel from the bottom of the fixing shaft 100 along the axial direction of the fixing shaft 100 and flows out of the first air outlet hole 132 at the top of the fixing shaft 100; in addition, a cavity is formed between the accommodating cavity 210 and the top of the first shaft section 110 of the fixing shaft 100, so that the airflow flowing out of the first air outlet 132 at the top of the fixing shaft 100 firstly enters the cavity and then flows out of the first air passage 220 communicated with the outside at the top of the cavity; the cavity can enable the airflow flowing out of the first air outlet 132 of the fixing shaft 100 to flow out to the outside through the first air passage 220 under the condition that the rotating module 200 rotates at any angle relative to the fixing shaft 100, thereby ensuring the stability of the first air passage 220 in transmitting air.

In one embodiment, the rotary module 200 is further provided with a second air path 230; the second air path 230 has a second air path air inlet 231 and a second air path air outlet 232; the fixed shaft 100 is further provided with a second air inlet hole 141 and a second air outlet hole 142, and the second air inlet hole 141 is communicated with the second air outlet hole 142; a first annular airflow channel 111 is disposed between the second air outlet 142 and the second air path inlet 231, and the first annular airflow channel 111 is used for keeping the second air outlet 142 and the second air path inlet 231 communicated at any rotation angle of the rotary module 200.

In this embodiment, a second air flow channel 140 is formed between the second air inlet hole 141 and the second air outlet hole 142, and the second air flow channel 140 is used for making the air flow from the bottom of the stationary shaft 100, upward along the stationary shaft 100 to the second air outlet hole 142 on the first shaft section 110 and outward; the air flow flowing out from the second air outlet 142 passes through the first annular air flow channel 111, and flows into the second air path inlet 231 and then flows out from the second air path outlet 232 under any rotation angle of the rotating module 200 relative to the fixed shaft 100, so as to ensure the stability of the air transmission of the second air path 230.

In one embodiment, the outer wall surface of the first shaft segment 110 of the stationary shaft 100 is provided with a first annular groove 112, and the first annular groove 112 is disposed around the first shaft segment 110; the second outlet hole 142 is disposed inside the first annular groove 112; the first annular groove 112 is used for forming the first annular airflow passage 111.

In the present embodiment, regardless of the angle to which the rotating module 200 is rotated with respect to the fixed shaft 100; the second air outlet 142, the first annular groove 112 and the second air path inlet 231 are all on the same axial plane; the air flow flowing out of the second air outlet 142 enters the first annular groove 112, flows along the outer wall surface of the first shaft section 110, flows into the second air passage 230 from the second air passage air inlet 231, and finally flows out from the second air passage air outlet 232; the stability of the gas transmission of the second gas path 230 can be ensured at the rotation angle of the rotary joint.

In one embodiment, the rotary module 200 is further provided with a third air path 240; the third air channel 240 has a third air channel air inlet 241 and a third air channel air outlet 242; the fixed shaft 100 is further provided with a third air inlet 151 and a third air outlet 152, and the third air inlet 151 is communicated with the third air outlet 152; a second annular air flow channel 113 is disposed between the third air outlet 152 and the third air path inlet 241, and the second annular air flow channel 113 is used to keep the third air outlet 152 and the third air path inlet 241 communicated at any rotation angle of the rotary module 200.

In the present embodiment, a third air flow channel 150 is formed between the third air inlet 151 and the third air outlet 152; the third airflow channel 150 is used for enabling the airflow to flow from the bottom of the stationary shaft 100, along the stationary shaft 100, to the third air outlet 152 on the first shaft section 110 and flow out; the air flow flowing out from the third air outlet 152 can flow into the third air channel inlet 241 and then flow out from the third air channel outlet 242 through the second annular air channel 113 under the condition that the rotating module 200 rotates at any angle relative to the fixed shaft 100, so as to ensure the stability of the gas transmission of the third air channel 240.

In one embodiment, the outer wall surface of the first shaft segment 110 of the fixed shaft 100 is provided with a second annular groove 114, the second annular groove 114 is arranged around the first shaft segment 110, and the second annular groove 114 and the first annular groove 112 are spaced from each other in the axial direction; the third outlet hole 152 is disposed inside the second annular groove 114; the second annular groove 114 is used to constitute the second annular gas flow passage 113.

In the present embodiment, regardless of the angle to which the rotating module 200 is rotated with respect to the fixed shaft 100; the third air outlet hole 152, the second annular groove 114 and the third air passage inlet 241 are all on the same axial plane. The airflow flowing out of the third air outlet 152 enters the second annular groove 114 and then flows along the outer wall surface of the first shaft section 110; then flows into the third gas path 240 from the third gas path gas inlet 241, and finally flows out from the third gas path gas outlet 242; the stability of the gas transmission of the third gas circuit 240 can be ensured at any rotation angle of the rotary joint.

In one embodiment, the bottom of the fixed shaft 100 is provided with a mounting seat 160 for mounting and fixing the fixed shaft 100 on a machine tool; the first air inlet hole 131 is disposed on the upper surface of the mounting base 160, and the first air outlet hole 132 is disposed on the top surface of the first shaft section 110; the first air inlet hole 131 is communicated with the first air outlet hole 132 through a first air flow channel 130; the first gas flow path 130 includes a first gas flow path horizontal part 133 and a first gas flow path vertical part 134 which are communicated; the first air flow path horizontal portion 133 is communicated with the first air intake hole 131; the first gas flow path vertical portion 134 communicates with the first gas outlet hole 132;

and/or the second air inlet hole 141 is disposed on the upper surface of the mounting seat 160, and the second air outlet hole 142 is disposed on the sidewall surface of the first shaft section 110; the second air inlet hole 141 and the second air outlet hole 142 are communicated with each other through a second air flow channel 140; the second flow channel 140 includes a second flow channel horizontal portion 143, a second flow channel vertical portion 144 in communication; the second flow channel horizontal portion 143 is communicated with the second air intake holes 141; the second flow channel vertical portion 144 communicates with the second outlet aperture 142;

and/or, a third air inlet 151 is disposed on the upper surface of the mounting seat 160, and the third air outlet 152 is disposed on the side wall surface of the first shaft section 110; the third air inlet hole 151 is communicated with the third air outlet hole 152 through a third air flow channel 150; the third air flow channel 150 includes a third air flow channel horizontal portion 153, a third air flow channel vertical portion 154 in communication; the third air flow channel horizontal portion 153 communicates with the third air inlet hole 151; the third flow channel vertical portion 154 communicates with the third outlet aperture 152.

In this embodiment, the fixing shaft 100 is fixed to the hollow portion at the center of the turntable by the mounting seat 160, and by the fixing shaft 100, the stability of the rotating module 200 during the rotation process is further improved, and the occurrence of radial runout of the rotating module 200 is reduced. And the first gas flow passage 130 is used for transmitting gas from the mounting seat 160 to the first gas outlet hole 132 on the top surface of the first shaft section 110 along the fixing shaft 100; specifically, the gas entering the vertical portion 144 of the second gas flow channel is delivered to the second gas outlet 142 on the sidewall of the first shaft segment 110, enters the first annular gas flow channel 111, and is then delivered to the second gas path 230, as shown in fig. 6; gas entering the vertical portion 154 of the third flow channel is delivered to the third outlet aperture 152 in the sidewall surface of the first shaft segment 110, enters the second annular flow channel 113, and is delivered to the third gas path 240, as shown in FIG. 7.

Referring to FIG. 9, in one embodiment, the first gas flow channel horizontal portion 133, the second gas flow channel horizontal portion 143, and the third gas flow channel horizontal portion 153 are disposed at the same axial position within the mounting seat 160. The manufacture of the stationary shaft 100 is facilitated by simply determining the axial position of the mounting base 160 during the manufacturing process and then rotating the mounting base 160 to a proper angle for drilling, thereby completing the machining of the first gas flow channel horizontal portion 133, the second gas flow channel horizontal portion 143 and the third gas flow channel horizontal portion 153. Meanwhile, the first flow channel horizontal portion 133, the second flow channel horizontal portion 143, and the third flow channel horizontal portion 153 are on the same axial plane, facilitating communication with an external air supply source. Further, the first, second and third flow channel

vertical portions

134, 144 and 154 are spaced radially within the stationary shaft 100 to prevent the flow of air between the different flow channels from intersecting and affecting the control of the pneumatic device.

Referring to fig. 10-12, in one embodiment, the rotating module 200 includes a rotating panel 250, a first ring block 260, a second ring block 270, and a third ring block 280; the third ring block 280 is provided with screws which sequentially penetrate through the second ring block 270, the first ring block 260 and the rotating panel 250 to be fixedly connected; the circular holes at the inner sides of the first ring block 260, the second ring block 270 and the third ring block 280 and the circular hole below the rotating panel 250 form the accommodating cavity 210; the depth of the receiving cavity 210 is greater than the length of the first shaft segment 110; the fixing shaft 100 is provided with a second shaft section 120, a bearing 121 is arranged on the second shaft section 120, and an inner ring of the bearing 121 is tightly attached and fixed with an outer wall surface of the second shaft section 120; the bearing 121 is located below the rotating module 200, and an outer ring of the bearing 121 rotates in synchronization with the rotating module 200.

In this embodiment, the third ring block 280 sequentially penetrates through the second ring block 270 and the first ring block 260 to be fixedly connected with the rotating panel 250 by arranging at least two screws; the rotating panel 250, the first ring block 260, the second ring block 270 and the third ring block 280 form the rotating module 200; the circular holes at the inner sides of the first ring block 260, the second ring block 270 and the third ring block 280 and the circular hole below the rotating panel 250 form the accommodating cavity 210, and the accommodating cavity 210 is used for sleeving the rotating module 200 on the first shaft section 110 of the fixed shaft 100 when the rotating module 200 is installed; when the rotating panel 250, the first ring block 260 and the second ring block 270 are installed, the first ring block is limited through a cylindrical pin, specifically, the cylindrical pin sequentially penetrates through the second ring block 270 and the first ring block 260 and finally enters the rotating panel 250 to realize pre-positioning before installation, the plurality of ring blocks and the rotating panel 250 are fixed together through screws on the third ring block 280, and meanwhile, the cylindrical pin is fixed inside the rotating module 200 through the third ring block 280.

Annular sealing grooves are formed in the contact surfaces of the rotating panel 250 and the first ring block 260 and the contact surfaces of the first ring block 260 and the second ring block 270, the contact surfaces of the second ring block 270 and the third ring block 280 are provided with annular sealing grooves, and O-shaped sealing rings are arranged in the sealing grooves to prevent gas from leaking from the connection surfaces; since the rotary module 200 rotates along the fixed shaft 100, radial runout is easily generated during the rotation of the rotary module 200. By providing a bearing 121 on the second shaft section 120 of the stationary shaft 100, the bearing 121 comprises an outer ring, an inner ring and balls disposed between the outer ring and the inner ring. The inner ring and the outer ring can rotate relatively. The inner ring is tightly attached and fixed to the outer wall surface of the second shaft section 120, meanwhile, the bearing 121 is located below the rotating module 200, and both the bearing 121 and the rotating module are mounted on the rotating table top of the turntable; the outer ring of the bearing 121 and the rotating module 200 rotate synchronously; specifically, during the installation and use of the rotary module 200, the inner ring is kept stationary, and the outer ring performs synchronous rotary motion along with the rotary module 200, so that the relative radial run-out between the dynamic seal and the shaft in the rotary joint can be reduced, and the service life of the dynamic seal can be prolonged.

In one embodiment, a first annular gap 251 is disposed on a sidewall of the circular receiving hole of the rotating panel 250, and the first annular gap 251 is located on a contact surface between the rotating panel 250 and the first ring block 260; a first dynamic seal 252 is arranged between the inside of the first annular gap 251 and the first shaft section 110, and is used for preventing gas in the cavity from leaking from the intersection of the rotating panel 250 and the first shaft section 110;

and/or a second annular notch 261 is arranged on the inner side wall of the first ring block 260, and the second annular notch 261 is located on the contact surface of the first ring block 260 and the second ring block 270; a second dynamic seal 262 is arranged between the inside of the second annular notch 261 and the first shaft section 110, and is used for preventing gas in the first annular gas flow channel 111 from leaking;

and/or a third annular gap 271 is arranged on the inner side wall of the second ring block 270, and the third annular gap 271 is located on the contact surface between the second ring block 270 and the third ring block 280; a third dynamic seal 272 is disposed between the inside of the third annular gap 271 and the first shaft segment 110 for preventing gas leakage from the second annular gas flow passage 113.

In this embodiment, the first dynamic seal 252, the second dynamic seal 262 and the third dynamic seal 272 are all gray rings, and each gray ring is formed by combining a rubber O-ring and a teflon ring, so that a high initial contact stress is generated on the sealing surface according to the deformation of the gray ring, and the gas leakage in the absence of pressure is prevented. During operation, the elastic deformation of the O-shaped sealing ring presses the square sealing ring to the maximum extent to make it cling to the sealing surface to generate higher additional contact stress increased with the pressure of the pressure gas, and the additional contact stress and the initial contact stress together prevent the leakage of the pressure gas

Specifically, the first dynamic seal 252 is disposed in the first annular gap 251, and during the rotation of the rotating module 200, the first dynamic seal 252 contacts the first shaft segment 110, so as to prevent gas from leaking from the intersection of the rotating panel 250 and the first shaft segment 110, and ensure the gas flow inside the cavity. The second dynamic seal 262 is disposed in the second annular gap 261, and the first annular gas flow passage 111 is sealed by the first dynamic seal 252 and the second dynamic seal 262, so as to prevent gas from leaking to the cavity or the second annular gas flow passage 113. The third dynamic seal 272 is disposed in the third annular gap 271, and the second annular gas flow channel 113 is sealed by the second seal 262 and the third seal 272, so as to prevent gas from leaking to the outside of the first annular gas flow channel 111 or the rotary module 200.

In combination with the bearing 121 disposed on the second shaft section 120 in the above embodiment, the relative radial runout of the first dynamic seal 252, the second dynamic seal 262 and the third dynamic seal 272 and the fixed shaft 100 in the rotating module 200 can be reduced, and the service life of the first dynamic seal 252, the second dynamic seal 262 and the third dynamic seal 272 can be prolonged.

In one embodiment, the rotating panel 250 has a vertically-oriented first air path 220 at the center; the second air path 230 in the rotary module 200 includes a second air path horizontal portion and a second air path vertical portion that are communicated with each other; the horizontal part of the second gas path is communicated with a second gas path gas inlet 231; the vertical part of the second gas path is communicated with a second gas path gas outlet 232;

and/or the third air passage 240 in the rotary module 200 comprises a third air passage horizontal part and a third air passage vertical part which are communicated with each other; the third air path horizontal part is communicated with a third air path air inlet 241; the third air path vertical portion is communicated with the third air path outlet 242.

In this embodiment, the second air path 230 includes a second air path horizontal portion and a second air path vertical portion that are communicated with each other; the second gas path horizontal part is arranged inside the first ring block 260, and the second gas path vertical part comprises a channel arranged on the rotating panel 250 and a channel arranged on the first ring block 260 and penetrating to the second gas path horizontal part; and a sealing ring is arranged between the channels forming the vertical part of the second gas path and used for separating different gas flows.

Further, the third gas path 240 includes a third gas path horizontal portion and a third gas path vertical portion that are communicated with each other; the third air passage horizontal portion is disposed inside the second ring block 270, and the third air passage vertical portion includes a passage disposed on the rotary panel 250, a passage disposed on the first ring block 260, and a passage disposed on the second ring block 270 to penetrate to the third air passage horizontal portion. And a sealing ring is arranged between the channels forming the vertical part of the third gas path and used for separating different gas flows.

Referring to fig. 13-18, in one embodiment, the present invention further includes a vertical turntable disposed on the machine tool, the vertical turntable includes: a stator assembly 300; a rotor assembly 400 rotatably provided on the stator assembly 300; the rotor assembly 400 has a rotating table 410, the rotating table 410 being capable of rotational movement relative to the stator assembly 300; and a multi-way rotary joint detachably disposed on the rotary table 410, wherein the multi-way rotary joint is any one of the multi-way rotary joints described in the above embodiments.

In this embodiment, the rotary module 200 of the multi-path rotary joint is partially installed on the rotary table 410, and the multi-path air flow inside the rotary module 200 is separated by the gurley ring and the annular sealing ring. When the life of the greige ring as a dynamic sealing element is reached, the rotary module 200 can be disassembled independently without disassembling other part structures, thereby facilitating maintenance or replacement of the dynamic sealing element.

Referring to fig. 17 and 18, in one embodiment, the rotary table 410 has a carrying surface 411 and a mounting surface 412; a stepped receiving channel 413 is formed in the center of the bearing surface 411, and the stepped receiving channel 413 is used for fixing the rotating module 200 of the multi-channel rotating joint; the mounting surface 412 is provided with a plurality of annular accommodating grooves 414 which are coaxially arranged; the stator assembly 300 comprises a shell 310, and the top of the stator assembly 300 is provided with a plurality of annular projections corresponding to the plurality of annular receiving grooves 414; when the rotary table 410 is mounted on the housing 310 in a limited manner, a fit gap is formed between the plurality of annular receiving grooves 414 and the plurality of annular protrusions.

In the present embodiment, the rotating module 200 is disposed in the stepped receiving passage 413, and when the greige ring as the dynamic sealing element reaches the service life, the rotating module 200 can be detached alone without detaching other parts and structures, thereby facilitating maintenance or replacement of the dynamic sealing element.

The liquid medium is filled in the fit clearance formed between the plurality of annular accommodating grooves 414 and the plurality of annular protrusions, and the rotating table 410 is adsorbed on the stator assembly 300 by the surface tension of the liquid medium, so that the distance between the rotating table 410 and the stator assembly 300 is kept unchanged when the rotating table rotates along with the rotor assembly 400.

Referring to fig. 16, in one embodiment, the rotor assembly 400 includes a rotating main shaft 420 and a plurality of permanent magnet units 421 disposed on an outer wall surface of the rotating main shaft 420; the rotating main shaft 420 is arranged around the fixed shaft 100 in the multi-channel rotating joint; the plurality of permanent magnet units 421 are disposed around the rotating main shaft 420;

and/or, the stator assembly 300 includes a housing 310 and a plurality of stator coils 311 disposed on an inner wall surface of the housing 310; the plurality of stator coils 311 are disposed around the plurality of permanent magnet units 421; when the plurality of stator coils 311 are energized, a moment is generated between the plurality of stator coils 311 and the plurality of permanent magnet units 421 to rotate the rotor assembly 400 relative to the stator assembly 300.

In one embodiment, the device further comprises a base 500 fixedly connected with the housing 310; a concave part is arranged at the center of the bottom surface of the base 500, the concave part is used for accommodating the mounting seat 160 of the fixing shaft 100, and the base 500 is fixed with the fixing shaft 100; and the positioning ring block 510 is fixedly arranged on the shell 310. The outer side of the shell 310 is provided with an air supply hole 312, and the air supply hole 312 is singly and correspondingly communicated with an air supply channel 320; the gas supply channel 320 comprises a first channel disposed in the housing 310, a second channel disposed in the retainer ring block 510, and a third channel disposed on the base 500; the air outlet end of the third channel is communicated with the air inlet hole on the upper surface of the mounting seat 160 at the bottom of the fixed shaft 100.

In the present embodiment, the vertical turntable includes a stator assembly 300, a rotor assembly 400, and a rotary joint provided on the rotor assembly 400. The positioning ring block 510 of the stator assembly 300 is fixed to the inner wall surface of the casing 310 by screws, the base 500 is located below the positioning ring block 510, and the base 500 is fixed to the casing 310 by screws. The rotating main shaft 420 in the rotor assembly 400 is rotatably fixed to the housing 310 by a turntable bearing or a cross roller bearing. A fixing module 330 is disposed at the top of the housing 310, and the fixing module 330 includes a first fixing element 331 and a second fixing element 332 rotatably disposed inside the first fixing element 331; the top of the first fixing component 331 is provided with the annular projection for positioning the rotary table 410; the second fixing member 332 has a groove therein for accommodating the bearing of the rotary joint, and the second fixing member 332 is used for fixedly connecting the rotary table 410 and the rotary spindle 420. A fixing shaft 100 in the multi-channel rotary joint is installed in the middle of the base 500 through a fixing seat, and the fixing shaft 100 penetrates through the rotor assembly 400; the rotating module 200 in the multi-channel rotating joint is fixedly arranged on the rotating table 410.

The multi-channel rotary joint comprises: a fixed shaft 100 disposed at the center of the turntable; the fixed shaft 100 is provided with a first air inlet hole 131 and a first air outlet hole 132, and the first air inlet hole 131 is communicated with the first air outlet hole 132; the rotating module 200 is arranged on the rotating table 410; the rotating module 200 has a receiving cavity 210, the rotating module 200 is disposed on the first shaft segment 110 at the top of the fixing shaft 100 through the receiving cavity 210, and the rotating module 200 can rotate relative to the fixing shaft 100; the rotating module 200 has a first air passage 220, and a cavity is formed between the accommodating cavity 210 and the top end of the first shaft section 110; the cavity is used to keep the first air outlet 132 and the first air passage 220 in a communication state at any rotation angle of the rotary module 200.

According to practical application, the air flow enters the air supply channel 320 formed by the channels in the housing 310, the positioning ring block 510 and the base 500 from the air supply hole 312 of the housing 310, and then enters the multi-channel rotary joint from the air supply channel 320, so that the air flow can flow out of the air channel of the rotary module 200 without obstruction under any rotation angle of the rotary module 200.

Claims

1. A multi-way rotary joint, usable with a turntable, comprising:

the fixed shaft is arranged at the center of the rotary table; the fixed shaft is provided with a first air inlet hole and a first air outlet hole, and the first air inlet hole is communicated with the first air outlet hole;

the rotating module is arranged on the table top of the rotary table; the rotating module is provided with an accommodating cavity, is arranged on a first shaft section at the top of the fixed shaft through the accommodating cavity and can rotate along the fixed shaft; the rotating module is provided with a first air path, and a cavity is formed between the accommodating cavity and the top end of the first shaft section; the cavity is used for enabling the first air outlet and the first air path to be kept in a communicated state at any rotation angle of the rotating module.

2. The multi-way rotary joint of claim 1, wherein the rotary module is further provided with a second air path; the second gas path is provided with a second gas path gas inlet and a second gas path gas outlet;

the fixed shaft is also provided with a second air inlet hole and a second air outlet hole, and the second air inlet hole is communicated with the second air outlet hole; and a first annular airflow channel is arranged between the second air outlet and the second air path air inlet and is used for communicating the second air outlet with the second air path air inlet at any rotation angle of the rotating module.

3. The multi-way rotary union of claim 2, wherein an outer wall surface of the first shaft segment of the stationary shaft is provided with a first annular groove disposed about the first shaft segment; the second air outlet hole is formed in the first annular groove; the first annular groove is used for forming the first annular airflow channel.

4. The multi-way rotary union of claim 3, wherein said rotary module is further provided with a third air path; the third gas path is provided with a third gas path gas inlet and a third gas path gas outlet; the fixed shaft is also provided with a third air inlet and a third air outlet, and the third air inlet is communicated with the third air outlet; and a second annular air flow channel is arranged between the third air outlet and the third air path air inlet and is used for communicating the third air outlet and the third air path air inlet at any rotation angle of the rotating module.

5. The multi-way rotary union of claim 4, wherein an outer wall surface of the first shaft segment of the stationary shaft is provided with a second annular groove disposed about the first shaft segment, the second annular groove and the first annular groove being axially spaced from one another; the third air outlet hole is formed in the second annular groove; the second annular groove is used for forming the second annular airflow channel.

6. The multi-way swivel according to claim 5, wherein the fixed shaft has a mounting seat at a bottom thereof for mounting and fixing the fixed shaft to a machine tool; the first air inlet hole is formed in the upper surface of the mounting seat, and the first air outlet hole is formed in the top surface of the first shaft section; the first air inlet hole is communicated with the first air outlet hole through a first air flow channel; the first gas flow passage comprises a first gas flow passage horizontal part and a first gas flow passage vertical part which are communicated; the horizontal part of the first air flow channel is communicated with the first air inlet hole; the vertical part of the first air flow channel is communicated with the first air outlet;

7. The multi-way swivel according to claim 6, wherein the first gas flow channel horizontal portion, the second gas flow channel first horizontal portion, and the third gas flow channel first horizontal portion are disposed at the same axial location within the mount;

8. The multi-way rotary joint of any one of claims 1-7, wherein the rotary module comprises a rotary face plate, a first ring block, a second ring block, and a third ring block; the third ring block is provided with a screw which sequentially penetrates through the second ring block and the first ring block to be fixedly connected with the rotating panel; the circular holes at the inner sides of the first ring block, the second ring block and the third ring block and the containing circular hole below the rotating panel form the containing cavity; the depth of the accommodating cavity is greater than the length of the first shaft section;

9. The multi-way rotary union of claim 8, wherein a first annular notch is provided in a sidewall of the receiving bore of the rotary face plate, the first annular notch being located on a contact surface of the rotary face plate with the first ring block; a first movable sealing element is arranged between the inside of the first annular gap and the first shaft section and used for preventing gas in the cavity from leaking from the intersection of the rotating panel and the first shaft section;

10. The multi-way rotary joint of claim 9, wherein the second air passage in the rotary module includes a second air passage horizontal portion and a second air passage vertical portion that communicate with each other; the horizontal part of the second air path is communicated with an air inlet of the second air path; the vertical part of the second gas path is communicated with a gas outlet of the second gas path;

11. The utility model provides a vertical revolving stage sets up on the lathe, its characterized in that, vertical revolving stage includes:

a stator assembly;

a rotor assembly rotatably disposed on the stator assembly; the rotor assembly is provided with a rotating table top which can rotate relative to the stator assembly; and

a multi-way rotary joint, which is detachably arranged on the rotary table surface, wherein the multi-way rotary joint is the multi-way rotary joint claimed in any one of claims 1 to 10.

12. The vertical turntable of claim 11, wherein the rotary table top has a bearing surface and a mounting surface; a step accommodating channel is arranged at the center of the bearing surface and used for fixing a rotating module of the multi-channel rotating joint; the mounting surface is provided with a plurality of coaxially arranged annular accommodating grooves;

and/or the stator assembly comprises a shell, and the top of the stator assembly is provided with a plurality of annular lugs corresponding to the plurality of annular accommodating grooves;

13. The vertical turntable of claim 12, wherein the rotor assembly includes a rotating main shaft and a plurality of permanent magnet units provided on an outer wall surface of the rotating main shaft; the rotating main shaft is arranged around a fixed shaft in the multi-channel rotating joint; the permanent magnet units are arranged around the rotating main shaft;

14. The vertical turntable of claim 12 or 13, further comprising:

the base is fixedly connected with the shell; the center of the bottom surface of the base is provided with a concave part, the concave part is used for accommodating the mounting seat of the fixed shaft, and the base is fixed with the fixed shaft;

and the positioning ring block is fixedly arranged on the shell.

15. The vertical turret according to claim 14, wherein the housing is provided with an air supply hole at an outer side thereof, the air supply hole being in single correspondence with one air supply passage; the gas supply channel comprises a first channel arranged on the shell, a second channel arranged in the positioning ring block and a third channel arranged on the base; and the air outlet end of the third channel is communicated with an air inlet hole on the mounting seat.