CN214444570U - Rotary joint and numerical control rotary table comprising same - Google Patents
Rotary joint and numerical control rotary table comprising same Download PDFInfo
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- CN214444570U CN214444570U CN202120606664.8U CN202120606664U CN214444570U CN 214444570 U CN214444570 U CN 214444570U CN 202120606664 U CN202120606664 U CN 202120606664U CN 214444570 U CN214444570 U CN 214444570U
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Abstract
A swivel joint has a first end at an upper portion and a second end at a lower portion, wherein the swivel joint comprises a swivel part and a stationary part, the stationary part being arranged around the swivel part and at least one bearing being arranged between the swivel part and the stationary part, such that the swivel part is rotatable relative to the stationary part. At least one stationary portion passage is provided in the stationary portion, the stationary portion passage communicating with an inlet provided on the second end of the rotary joint; and at least one rotating part channel is provided in the rotating part, which rotating part channel communicates with an outlet provided on the first end of the swivel joint and with the stationary part channel via at least one annular chamber. The rotary joint of the structure can conveniently take over, and the overall structure layout is more reasonable. Also relates to a numerical control rotary table comprising the rotary joint.
Description
Technical Field
The application relates to the field of numerical control devices, in particular to a rotary joint, and further relates to a numerical control turntable comprising the rotary joint.
Background
Numerically controlled machines have found wide application in the field of machining. The numerical control turntable is an important component of some types of numerical control machines, and multiple contours comprising curved surfaces are machined by multi-axis linkage. A numerically controlled turret will generally comprise a rotating shaft on which a table on which a workpiece to be machined can be carried is rotatably carried, and at least one tilting and/or supporting shaft to achieve a multi-axis linkage.
The workpiece is typically clamped to the table pneumatically, hydraulically, or the like. With the numerical control turntable of this structure, there are some problems as follows. Specifically, in a pneumatic or hydraulic clamping system, a pipeline needs to be arranged to supply pneumatic or hydraulic fluid (such as hydraulic oil) to the clamping system, and meanwhile, the numerical control turntable rotates in the working process, and the pipeline for conveying the pneumatic or hydraulic fluid is wound due to the rotation of the workbench, so that adverse effects are caused on the operation of the numerical control turntable, and the numerical control turntable can be seriously disabled to operate.
Therefore, there is a need for an improved structure of the numerical control turntable to avoid the above-mentioned influence on the operation of the numerical control turntable caused by the winding of the rotation of the table.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a make for solving above the problem that prior art exists. The utility model aims at providing a rotary joint, it has more reasonable overall structure overall arrangement, and it is convenient for take over, and can avoid the pipeline winding.
The utility model discloses a rotary joint has the first end that is located the upper portion and is located the second end of lower part, and wherein, rotary joint includes rotating part and fixed part, and the fixed part cover is established in rotating part's outside, and is provided with at least one bearing between rotating part and fixed part to rotating part can be rotatory for fixed part. At least one stationary portion passage is provided in the stationary portion, the stationary portion passage communicating with an inlet provided on the second end of the rotary joint; at least one rotating part passage is provided in the rotating part, the rotating part passage communicating with an outlet provided on the first end of the rotary joint and communicating with the fixed part passage; and at least one annular cavity formed between the rotating portion and the stationary portion, wherein the at least one stationary portion passage and the at least one rotating portion passage communicate via the at least one annular cavity.
Through the rotary joint with the structure, the working fluid (gas or liquid) can be supplied to the fixed part which is kept fixed in the operation process from the bottom of the rotary joint, and the working fluid flows out from the top of the rotary joint, so that the pipe connection can be conveniently carried out, and meanwhile, the required power can be output when a workpiece needs to be clamped. Furthermore, the rotary joint with the structure can be beneficial to realizing more reasonable overall layout.
In a preferred construction, the upper end of at least one stationary part channel communicates with at least one annular chamber and the lower end of at least one rotating part channel communicates with at least one annular chamber. Thereby, fluid communication between the stationary part channel and the rotating part channel is achieved.
A preferred configuration of the at least one ring cavity is such that it comprises: a first annular groove formed on an outer surface of the rotating portion; and a second annular groove formed on an inner surface of the fixed portion, the first annular groove cooperating with the second annular groove to form an annular cavity. The annular chamber may be rectangular, oval or circular in cross-sectional shape.
The stationary part channel and the rotating part channel may be of the same cross-sectional size or may differ in cross-sectional size, e.g. the diameter of the stationary part channel is smaller than the diameter of the rotating part channel, in which case at least one of the first annular groove and the second annular groove may be formed in a tapered shape, e.g. a cone or the like.
Preferably, seals are provided on the upper and/or lower side of the at least one annular chamber to prevent fluid in the annular chamber from leaking and contaminating the interior of the numerical control turret.
In one specific example, the seal is a rotating greige ring.
In one specific structure, the fixing portion includes: a small-sized section located at an upper portion of the fixing portion;
a large-sized section located at a lower portion of the fixed portion; and a transition section connected between the small-size section and the large-size section; wherein the fixed portion passage extends from the small-sized section through the transition section into the large-sized section and to the inlet.
Preferably, at least one leakage channel is provided in the stationary part, the at least one leakage channel communicating with the at least one annular chamber and with a leakage opening provided in the stationary part at the second end of the swivel joint.
Further preferably, the at least one annular chamber comprises a plurality of annular chambers, wherein the uppermost annular chamber is used as an upper leakage annular chamber and the lowermost annular chamber is used as a lower leakage annular chamber, and the at least one leakage passage communicates with at least one of the upper leakage annular chamber and the lower leakage annular chamber.
The leakage channel can play a role in drainage when the sealing element of the annular cavity fails so as to prevent fluid from entering the inside of the numerical control rotary table to pollute the numerical control rotary table.
And a numerically controlled turn table including a rotating shaft on which a table is rotatably carried and at least one tilting shaft connected to the rotating shaft, the tilting shaft being capable of tilting the rotating shaft as a whole. Wherein a rotary joint as described above is included in the rotary shaft, wherein at the first end the rotary part is connected with the table and the stationary part is fixedly connected in the rotary shaft.
Drawings
The features and advantages of the present invention will become more apparent from the following non-limiting description of the preferred embodiments of the invention, as illustrated in the accompanying drawings. Wherein:
fig. 1 shows a schematic front view of the overall structure of the numerical control turntable of the present invention.
Fig. 2 shows a schematic sectional view of a rotating shaft of the numerical control turntable shown in fig. 1 to show an internal structure of the rotating shaft.
Fig. 3 shows a cross-sectional view of a rotary joint in the rotary shaft of fig. 2.
Figure 4 shows another cross-sectional view of the rotary joint shown in figure 3.
Detailed Description
The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that only the preferred embodiment of the invention has been shown in the drawings and is not to be considered limiting of its scope. Various obvious modifications, changes and equivalents of the embodiments of the present invention can be made by those skilled in the art based on the embodiments shown in the drawings, and all of them are within the protection scope of the present invention.
In the following description, terms indicating directions and orientations such as "up" and "down" are used, which are based on the orientations shown in the drawings or the orientations of the numerical control turntable when the numerical control turntable is actually installed, for convenience of description, and during operation, the components of the numerical control turntable may rotate, tilt, and the like, so that the orientations of some components may change.
Fig. 1 schematically shows the overall structure of the numerical control rotary table 10 of the present invention. The numerical control turret 10 includes a rotary shaft 100, and a table 180 is rotatably carried on the rotary shaft 100, and a workpiece to be machined can be carried on the table 180 for machining a machining part (e.g., a tool bit, etc.) of the numerical control machine. A tilting shaft 200 may be provided on at least one side of the rotating shaft 100, and the tilting shaft 200 may support the rotating shaft 100 and can bring the rotating shaft 100 to be tilted as a whole. Preferably, another tilting shaft may be further provided on the other side of the rotating shaft 100 or a support shaft may be provided.
Fig. 2 shows a cross-sectional view of the rotary shaft 100 of the numerically controlled turntable 10, in which a rotary joint 300 is shown provided at the center of the rotary shaft 100, the upper end of the rotary joint 300 supporting the table 180 and enabling the table 180 to rotate.
Fig. 3 shows a cross-sectional view of the rotary joint 300, and the structure of the rotary joint 300 of the present invention will be described in detail with reference to fig. 3.
The rotary joint 300 has two ends, a first end 301 and a second end 302 opposite the first end 301. In the structure shown in the drawing, the first end 301 is an upper end of the rotary joint 300, and the second end 302 is a lower end thereof, and the rotary joint 300 is connected to the table 180 at the first end 301.
The rotary joint 300 includes a rotary portion 310 and a stationary portion 320 provided outside the rotary portion 310, the stationary portion 320 is fixedly coupled in the rotary shaft 100, and the rotary portion 310 is rotatable with respect to the stationary portion 320. Thus, at the first end 301 of the rotary joint 300, in particular the rotary part 310 of the rotary joint 300, is connected with the table 180, when the rotary part 310 rotates relative to the fixed part 320, and thus relative to the rotation axis 100, the table 180 may be brought to rotate together relative to the rotation axis 100.
At least one bearing is provided between the rotating part 310 and the fixed part 320 to enable the rotating part 310 to rotate with respect to the fixed part 320. As shown in fig. 3, two bearings, i.e., a first bearing 331 located at an upper side and a second bearing 332 located at a lower side, are provided between the rotating part 310 and the fixed part 320.
In a preferred structure, the rotating portion 310 is substantially cylindrical, and the cross-sectional dimension thereof is substantially constant in the up-down direction, while the fixed portion 320 includes two portions having different cross-sectional dimensions (e.g., diameters), i.e., a small-sized section 321 located at the upper portion and a large-sized section 322 located at the lower portion, and a transition section 323 is provided between the small-sized section 321 and the large-sized section 322 to achieve a transition from the small size of the small-sized section 321 to the large size of the large-sized section 322. In the preferred construction shown in the figures, the transition section 323 is a step section connecting between the small-sized section 321 and the large-sized section 322. In other alternative examples, the transition section 323 may be a bevel, a curved surface, or the like connecting the small-sized section 321 and the large-sized section 322. Further, in the preferred construction, the first bearing 331 is disposed between the rotating portion 310 and the small-sized section 321 of the fixed portion 320 at a position near the first end 301 of the rotary joint 300, and the second bearing 332 is disposed between the rotating portion 310 and the small-sized section 321 at a position near the second end 302.
A fixing-part passage 341 is provided in the fixing part 320, the fixing-part passage 341 extending from the small-sized section 321 of the fixing part 320 through the transition section 323 into the large-sized section 322. An inlet 343 is formed at the large-sized section 322 at the position of the second end 302, and the lower end of the fixed-part passage 341 communicates with the inlet 343.
In the preferred construction shown in fig. 3, two fixing portion passages 341 are formed in the fixing portion 320. Besides, according to actual needs, more or less fixed part channels 341 may be provided in the fixed part channel 341, for example, only one fixed part channel 341 may be provided, or three, four or more fixed part channels 341 may also be provided, specifically, the number of the fixed part channels 341 is set according to the number of the pneumatic/hydraulic interfaces required by different tables, so as to ensure that the number of the set fixed part channels 341 is not less than the number of the pneumatic/hydraulic interfaces required by the tables. The number of inlets 343 communicating with the fixed part passage 341 may be the same as the number of fixed part passages 341, i.e., each fixed part passage 341 has one corresponding inlet 343. Alternatively, several fixed part channels 341 may share one inlet 343, which is also within the scope of the present invention.
The fixing portion passage 341 may take various suitable sectional shapes as needed, for example, the sectional shape of the fixing portion passage 341 may be a circle, an ellipse, a triangle, a rectangle, a polygon, or the like.
Further, as shown in the drawing, when the fixed portion passage 341 is machined, a through hole extending from the outer surface of the fixed portion 320 to the inner surface of the rotating portion 310 is sometimes formed. After the machining is completed, a sealing plug 345 is provided in the through-hole to finally form the desired fixing portion passage 341.
A rotating part passage 342 is provided in the rotating part 310, and a lower end of the rotating part passage 342 communicates with the fixed part passage 341. An outlet 344 is formed at the position of the rotating portion 310 at the first end 301, and the upper end of the rotating portion passage 342 communicates with the outlet 344.
The number of the rotating part passage 342 may be set according to actual needs, and preferably, the number of the rotating part passage 342 may be the same as that of the fixed part passage 341. Of course, the number of the fixed part channels 341 and the rotating part channels 342 may also be different, which is also within the scope of the present invention. Further, similar to the number relationship between the fixed part passage 341 and the inlet 343, the number of the rotating part passage 342 may be the same as or different from the number of the outlet 344, which are also within the scope of the present invention.
A preferred structure of the present invention for achieving the communication between the fixed part passage 341 and the rotating part passage 342 will be described further below.
Still referring to fig. 3, at least one, and preferably a plurality of first annular grooves are formed on the outer surface of the rotating part 310, and second annular grooves corresponding to the first annular grooves are formed on the inner surface of the fixing part 320. The first and second annular grooves cooperate to form at least one annular chamber 351 located between the rotating portion 310 and the stationary portion 320. One side (outside) of the annular chamber 351 communicates with the fixed-part passage 341, specifically, the upper end of the fixed-part passage 341, and the other side thereof communicates with the rotating-part passage 342, specifically, the lower end of the rotating-part passage 342.
The cross-section of the first and second annular grooves forming the annular cavity 351 may be a portion of a rectangle, an ellipse, or a circle, and the annular cavity 351 formed may have a corresponding shape of a rectangle, an ellipse, or a circle.
In a preferred construction, the cross-sectional dimension (e.g., diameter) of the fixed portion passage 341 is smaller than the cross-sectional dimension (e.g., diameter) of the rotating portion passage 342. Correspondingly, at least one of the first annular groove on the rotating part 310 and the second annular groove on the fixing part 320 is formed in a structure tapered in a direction from the rotating part 310 to the fixing part 320, for example, in a wedge shape having one end on one side of the rotating part 310 with a larger size and the end on one side of the fixing part 320 with a smaller size.
The above-described structure in which the rotating-part passage 342 is provided with a sectional size smaller than that of the fixed-part passage 341 can help prevent leakage of the operating fluid (gas or liquid).
Preferably, seals 352 are provided on both upper and lower sides of each annular chamber 351 to seal the annular chambers 351. The seal 352 is a dynamic seal, an example of which is a rotating Grey ring.
During operation, a line for supplying an operating fluid (gas or liquid) is connected to the inlet 343 provided at the second end 302 of the rotary joint 300, the operating fluid is supplied to the fixed part passage 341 of the fixed part 320, then the operating fluid flows into the annular chamber 351, then flows into the rotary part passage 342 of the rotary part 310, and finally flows out from the outlet 344 at the first end 301 of the rotary joint 300.
Fig. 4 shows another cross-sectional view of rotary joint 300, in which a further preferred construction of rotary joint 300 is shown. As shown in fig. 4, at least one leakage passage 361 is further provided in the fixed portion 320, the leakage passage 361 extending from the small-sized section 321 of the fixed portion 320 through the transition section 323 into the large-sized section 322 and communicating with a leakage port 364 provided at the fixed portion 320 at the position of the second end 302 of the rotary joint 300. In the plurality of annular chambers 351 located between the rotating portion 310 and the fixed portion 320, the one at the uppermost portion is used as the upper leakage annular chamber 362, the one at the lowermost portion is used as the lower leakage annular chamber 363, and the leakage passage 361 communicates with the upper leakage annular chamber 362 and the lower leakage annular chamber 363.
With the leakage passage 361 provided as described above, if the seal 352 of any one of the plurality of annular chambers 351 fails, the leaked fluid may enter the leakage passage 361 through the upper leakage annular chamber 362 located at the uppermost portion and/or the lower leakage annular chamber 363 located at the lowermost portion, and finally be discharged from the leakage port 364. In this way, contamination of the interior of the numerical control turret 10 by fluid can be avoided.
Preferably, a sensing element (not shown), such as a sensor, may be provided at the leak port 364 so that when the seal 352 fails and a leak occurs at the annular cavity 351, the leak can be detected by detecting the presence of working fluid in the leak port 364. Alternatively, the leak port 364 may be connected to a separately provided working fluid collecting tank, and the above-described leak detection element is provided in the working fluid collecting tank.
Claims (9)
1. A swivel joint having an upper first end and a lower second end, wherein the swivel joint comprises a swivel part and a stationary part, the stationary part being arranged around the swivel part and at least one bearing being arranged between the swivel part and the stationary part, such that the swivel part is rotatable relative to the stationary part,
at least one stationary portion passage is provided in the stationary portion, the stationary portion passage communicating with an inlet provided on the second end of the rotary joint;
at least one rotating section passage is provided in the rotating section, the rotating section passage communicating with an outlet provided on the first end of the rotary joint; and
at least one annular cavity formed between the rotating portion and the stationary portion, wherein the at least one stationary portion passage and the at least one rotating portion passage communicate via the at least one annular cavity.
2. The swivel joint of claim 1, wherein an upper end of the at least one stationary part channel is in communication with the at least one annular chamber and a lower end of the at least one rotating part channel is in communication with the at least one annular chamber.
3. The swivel joint of claim 1, wherein said at least one annular cavity comprises:
a first annular groove formed on an outer surface of the rotating portion; and
a second annular groove formed on an inner surface of the fixed portion, the first annular groove cooperating with the second annular groove to form the annular cavity.
4. A swivel joint according to any of claims 1 to 3, wherein a seal is provided at the upper and/or lower side of the at least one annular chamber.
5. The rotary union of claim 4, wherein the seal is a rotary Grey ring.
6. The swivel joint of claim 1, wherein said stationary portion comprises:
a small-sized section located at an upper portion of the fixing portion;
a large-sized section located at a lower portion of the fixed portion; and
a transition section connected between the small-sized section and the large-sized section;
wherein the fixed portion passage extends from the small-dimension section through the transition section into the large-dimension section and to the inlet.
7. The swivel joint of claim 1, wherein at least one leakage passage is provided in the stationary portion, the at least one leakage passage communicating with the at least one annular chamber and with a leakage port provided on the stationary portion at the second end of the swivel joint.
8. The swivel joint of claim 7, wherein said at least one annular cavity comprises a plurality of annular cavities, wherein said annular cavity at the uppermost portion is used as an upper leakage annular cavity and said annular cavity at the lowermost portion is used as a lower leakage annular cavity, said at least one leakage passage being in communication with at least one of said upper leakage annular cavity and said lower leakage annular cavity.
9. A numerical control turntable comprises a rotating shaft and at least one inclined shaft connected with the rotating shaft, a workbench is rotatably carried on the rotating shaft, and the inclined shaft can enable the rotating shaft to be integrally inclined;
characterized in that the rotary joint according to any one of claims 1-8 is included in the rotary shaft, wherein at the first end the rotary part is connected with the table and the stationary part is fixedly connected in the rotary shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606664.8U CN214444570U (en) | 2021-03-25 | 2021-03-25 | Rotary joint and numerical control rotary table comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120606664.8U CN214444570U (en) | 2021-03-25 | 2021-03-25 | Rotary joint and numerical control rotary table comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214444570U true CN214444570U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120606664.8U Active CN214444570U (en) | 2021-03-25 | 2021-03-25 | Rotary joint and numerical control rotary table comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214444570U (en) |
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2021
- 2021-03-25 CN CN202120606664.8U patent/CN214444570U/en active Active
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Effective date of registration: 20221223 Address after: 261500 No. 3008, Haomai Road, Mishui street, Gaomi City, Weifang City, Shandong Province Patentee after: Shandong Haomai CNC Machine Tool Co.,Ltd. Address before: 261500 Zone C, Haomai technology, No.1, Haomai Road, Gaomi City, Weifang City, Shandong Province Patentee before: HIMILE MECHANICAL SCIENCE AND TECHNOLOGY (SHANDONG) Co.,Ltd. |