CN210566888U - Compact central swivel joint - Google Patents
Compact central swivel joint Download PDFInfo
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- CN210566888U CN210566888U CN201921366066.7U CN201921366066U CN210566888U CN 210566888 U CN210566888 U CN 210566888U CN 201921366066 U CN201921366066 U CN 201921366066U CN 210566888 U CN210566888 U CN 210566888U
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Abstract
The utility model relates to a compact central swivel joint, it includes revolving axle (1) and solid of revolution (2), central oil duct hole (3) have been seted up along the axial in revolving axle (1) center, be provided with many oil circuit holes (4) around central oil duct hole (3), central oil duct hole (3) on revolving axle (2) and oil circuit hole (4) adopt casting mode integrated into one piece, oil circuit hole (4) are including axial section one (4.1), slope section (4.2), axial section two (4.3) and radial section (4.4) that connect gradually. The utility model relates to a compact central swivel joint, it has changed the structural style in the inside oil duct hole of revolving axle, and the oil duct hole wholly adopts the casting mode to form, can effectively reduce the wall thickness between oil duct hole and the hole, and oil duct hole cross-section is oval, can reduce the radial dimension of revolving axle for final central swivel joint overall dimension reduces, and weight reduction, overall structure is compact.
Description
Technical Field
The utility model relates to a compact central authorities swivel joint belongs to engineering machine tool technical field.
Background
Because the engineering machinery industry is rapidly developed at home in recent years, the country greatly promotes the development of the engineering machinery manufacturing industry, and simultaneously, because the engineering machinery manufacturing industry level in China is still behind compared with that in foreign countries, the foreign engineering machinery is huge to firmly grasp the key technology and inhibit the development of the domestic manufacturing level. With the increase of domestic demand of engineering machinery, the contradiction between supply and demand is gradually increased.
The central rotary joint belongs to an important part in a hydraulic component of large-scale engineering machinery, plays an important role in connecting an upper hydraulic pipeline and a lower hydraulic pipeline, and plays an especially important role in the stable rotation of the engineering machinery and the smoothness of an oil way. At present, rotary joint products relate to different fields such as engineering, coal, chemical industry, petroleum, ships, rail transit and the like, the industries are different, functional requirements on the rotary joint are different, and requirements on demand, functions and reliability of the rotary joint are continuously improved along with the development of economy, so that the rotary joint products with high efficiency and low consumption are developed and produced, diversified, multifunctional and high-technology contents are produced and sold, and the rotary joint products have important aims and meanings for expanding the market share of companies and improving the competitiveness and influence of enterprises.
The existing central swivel joint generally comprises a swivel shaft and a swivel body, wherein a central oil passage hole is formed in the center of the swivel shaft along the axial direction, a plurality of oil passage holes are formed in the periphery of the central oil passage hole, the existing oil passage hole is generally of an L-shaped structure and consists of an axial hole and a radial hole, the existing central oil passage hole and the L-shaped oil passage hole are formed in a machining mode, certain requirements exist on the wall thickness between the holes and the outer side wall of the swivel shaft due to machining, the overall strength of the swivel shaft is easily influenced when the wall thickness is too thin during machining, the overall size of the swivel shaft needs to meet certain requirements under the condition of meeting the size of the oil passage hole, and the overall size of the central swivel joint is limited, so that the final overall size of the central swivel joint is large, and the.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a compact central authorities swivel joint is provided to above-mentioned prior art, it has changed the structural style in the inside oil duct hole of revolving axle, and the oil duct hole wholly adopts the casting mode to form, can effectively reduce the wall thickness between oil duct hole and the hole, and oil duct hole cross-section is oval, can reduce the radial dimension of revolving axle for final central authorities swivel joint overall dimension reduces, weight reduction, overall structure is compact.
The utility model provides a technical scheme that above-mentioned problem adopted does: a compact central rotary joint comprises a rotary shaft and a rotary body, wherein a central oil passage hole is formed in the center of the rotary shaft along the axial direction, a plurality of oil passage holes are formed in the periphery of the central oil passage hole, the central oil passage hole and the oil passage holes in the rotary shaft are integrally formed in a casting mode, and each oil passage hole comprises an axial section I, an inclined section II and a radial section which are sequentially connected.
Preferably, the connection parts of the axial section I, the inclined section, the axial section II and the radial section are transited through arc sections.
Preferably, the cross-sections of the central oil passage hole and the oil passage hole are elliptical.
Preferably, the rotating shaft comprises an upper section, a middle section and a lower section, the sizes of the upper section, the middle section and the lower section are sequentially reduced, the lower section of the rotating shaft is inserted into the rotating body, and the middle section of the rotating shaft is placed on the top surface of the rotating body.
Preferably, the inclined section extends from the upper section to the middle section of the rotating shaft, and the axial section is located in the lower section area of the rotating shaft.
Preferably, a plurality of annular oil ducts are formed in the inner wall of the revolving body, a plurality of oil outlet holes are formed in the revolving body along the radial direction, the plurality of oil outlet holes are communicated with the plurality of annular oil ducts in a one-to-one correspondence mode, and the plurality of oil passage holes are communicated with the plurality of annular oil ducts in a one-to-one correspondence mode through respective radial sections.
Preferably, a sealing ring groove is formed between every two adjacent annular oil passages, and a first sealing ring is arranged in each sealing ring groove.
Preferably, an inner step is arranged on the bottom surface of the revolving body, an inner end cover is arranged on the inner step, a first through hole is formed in the center of the inner end cover, an outer end cover is arranged on the outer side of the inner end cover, a second through hole is formed in the center of the outer end cover, and the central oil passage hole, the first through hole and the second through hole are sequentially communicated.
Preferably, an outer step is arranged on the outer side of the inner step, and a second sealing ring is arranged between the outer step and the outer end cover.
Preferably, the outer end cover is connected with the revolving body through a connecting bolt, and the inner end cover is connected with the revolving shaft through a connecting bolt.
Compared with the prior art, the utility model has the advantages of:
the utility model relates to a compact central swivel joint, it has changed the structural style in the inside oil duct hole of revolving axle, and the oil duct hole wholly adopts the casting mode to form, can effectively reduce the wall thickness between oil duct hole and the hole, and oil duct hole cross-section is oval, can reduce the radial dimension of revolving axle for final central swivel joint overall dimension reduces, and weight reduction, overall structure is compact.
Drawings
Fig. 1 is a schematic structural diagram of a compact central swivel joint according to the present invention.
Wherein:
rotating shaft 1
Upper section 1.1
Middle section 1.2
Lower section 1.3
Central oil passage hole 3
Axial segment one 4.1
Inclined section 4.2
Axial section two 4.3
Radial segment 4.4
Arc segment 4.5
First through hole 11
Second through hole 13
A bolt 16 is attached.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the compact central swivel joint in this embodiment includes a swivel shaft 1 and a swivel body 2, the lower end of the swivel shaft 1 is axially inserted into the swivel body 2 from the upper end of the swivel body 2, and the upper end of the swivel shaft 1 is exposed out of the swivel body 2, a central oil passage hole 3 is axially formed in the center of the swivel shaft 1, a plurality of oil passage holes 4 are formed around the central oil passage hole 3, the central oil passage hole 3 and the oil passage holes 4 on the swivel shaft 2 are integrally formed by casting, and the oil passage hole 4 includes an axial section one 4.1, an inclined section 4.2, an axial section two 4.3, and a radial section 4.4 which are sequentially connected;
the connection parts of the axial section I4.1, the inclined section 4.2, the axial section II 4.3 and the radial section 4.4 are transited through an arc section 4.5;
the sections of the central oil passage hole 3 and the oil passage hole 4 are elliptic;
the rotating shaft 1 comprises an upper section 1.1, a middle section 1.2 and a lower section 1.3, the sizes of the upper section 1.1, the middle section 1.2 and the lower section 1.3 are sequentially reduced, the lower section 1.3 of the rotating shaft 1 is inserted into the rotating body 2, and the middle section 1.2 of the rotating shaft 1 is placed on the top surface of the rotating body 2;
the inclined section 4.2 extends from the upper section 1.1 to the middle section 1.2 of the rotating shaft 1, and the axial hole II 4.3 is positioned in the area of the lower section 1.3 of the rotating shaft 1;
the inner wall of the revolving body 2 is provided with a plurality of annular oil ducts 5, the revolving body 2 is radially provided with a plurality of oil outlet holes 6, the plurality of oil outlet holes 6 are respectively communicated with the plurality of annular oil ducts 5 in a one-to-one correspondence manner, and the plurality of oil passage holes 4 are respectively communicated with the plurality of annular oil ducts 5 in a one-to-one correspondence manner through respective radial sections 4.4;
a seal ring groove 7 is formed between every two adjacent annular oil ducts 5, and a first seal ring 8 is arranged in each seal ring groove 7;
an inner step 9 is arranged on the bottom surface of the revolving body 2, an inner end cover 10 is arranged on the inner step 9, a first through hole 11 is formed in the center of the inner end cover 10, an outer end cover 12 is arranged on the outer side of the inner end cover 10, a second through hole 13 is formed in the center of the outer end cover 12, and the central oil passage hole 3, the first through hole 11 and the second through hole 13 are sequentially communicated;
an outer step 14 is arranged on the outer side of the inner step 9, and a second sealing ring 15 is arranged between the outer step 14 and the outer end cover 12;
the outer end cover 12 is connected with the revolving body 2 through a connecting bolt 16;
the inner end cap 10 is connected to the rotation shaft 1 by a connecting bolt 16.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (10)
1. A compact central swivel joint characterized by: the oil way structure comprises a rotating shaft (1) and a rotating body (2), wherein a central oil way hole (3) is formed in the center of the rotating shaft (1) along the axial direction, a plurality of oil way holes (4) are formed in the periphery of the central oil way hole (3), the central oil way hole (3) and the oil way holes (4) in the rotating shaft (1) are integrally formed in a casting mode, and the oil way holes (4) comprise an axial section I (4.1), an inclined section I (4.2), an axial section II (4.3) and a radial section I (4.4) which are sequentially connected.
2. A compact central swivel joint according to claim 1, wherein: the connection parts of the axial section I (4.1), the inclined section (4.2), the axial section II (4.3) and the radial section (4.4) are transited through the arc section (4.5).
3. A compact central swivel joint according to claim 1, wherein: the sections of the central oil passage hole (3) and the oil passage hole (4) are elliptic.
4. A compact central swivel joint according to claim 1, wherein: the rotating shaft (1) comprises an upper section (1.1), a middle section (1.2) and a lower section (1.3), the sizes of the upper section, the middle section and the lower section are sequentially reduced, the lower section (1.3) of the rotating shaft (1) is inserted into the rotating body (2), and the middle section (1.2) of the rotating shaft (1) is placed on the top surface of the rotating body (2).
5. A compact central swivel joint according to claim 4, wherein: the inclined section (4.2) extends from the upper section (1.1) of the rotary shaft (1) to the middle section (1.2), and the second axial section (4.3) is located in the region of the lower section (1.3) of the rotary shaft (1).
6. A compact central swivel joint according to claim 1, wherein: the oil-gas separation device is characterized in that a plurality of annular oil ducts (5) are formed in the inner wall of the revolving body (2), a plurality of oil outlets (6) are formed in the revolving body (2) along the radial direction, the plurality of oil outlets (6) are communicated with the plurality of annular oil ducts (5) in a one-to-one correspondence mode, and the plurality of oil way holes (4) are communicated with the plurality of annular oil ducts (5) in a one-to-one correspondence mode through respective radial sections (4.4).
7. A compact central swivel joint according to claim 6, wherein: a sealing ring groove (7) is formed between every two adjacent annular oil ducts (5), and a first sealing ring (8) is arranged in each sealing ring groove (7).
8. A compact central swivel joint according to claim 1, wherein: the rotary body (2) is characterized in that an inner step (9) is arranged on the bottom surface of the rotary body (2), an inner end cover (10) is arranged on the inner step (9), a first through hole (11) is formed in the center of the inner end cover (10), an outer end cover (12) is arranged on the outer side of the inner end cover (10), a second through hole (13) is formed in the center of the outer end cover (12), and the central oil passage hole (3), the first through hole (11) and the second through hole (13) are communicated in sequence.
9. A compact central swivel joint according to claim 8, wherein: an outer step (14) is arranged on the outer side of the inner step (9), and a second sealing ring (15) is arranged between the outer step (14) and the outer end cover (12).
10. A compact central swivel joint according to claim 8, wherein: the outer end cover (12) is connected with the revolving body (2) through a connecting bolt (16), and the inner end cover (10) is connected with the revolving shaft (1) through the connecting bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921366066.7U CN210566888U (en) | 2019-08-21 | 2019-08-21 | Compact central swivel joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921366066.7U CN210566888U (en) | 2019-08-21 | 2019-08-21 | Compact central swivel joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210566888U true CN210566888U (en) | 2020-05-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921366066.7U Active CN210566888U (en) | 2019-08-21 | 2019-08-21 | Compact central swivel joint |
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|---|---|
| CN (1) | CN210566888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500464A (en) * | 2019-08-21 | 2019-11-26 | 江苏长龄液压股份有限公司 | A kind of compact center-rotary joint |
-
2019
- 2019-08-21 CN CN201921366066.7U patent/CN210566888U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500464A (en) * | 2019-08-21 | 2019-11-26 | 江苏长龄液压股份有限公司 | A kind of compact center-rotary joint |
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