CN209856243U - Rotating shaft sealing structure - Google Patents
Rotating shaft sealing structure Download PDFInfo
- Publication number
- CN209856243U CN209856243U CN201920316394.XU CN201920316394U CN209856243U CN 209856243 U CN209856243 U CN 209856243U CN 201920316394 U CN201920316394 U CN 201920316394U CN 209856243 U CN209856243 U CN 209856243U
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- oil seal
- shell
- hole
- bushing
- oil
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Abstract
The utility model discloses a rotary shaft sealing structure, which comprises a shell and a rotary shaft, wherein the shell is provided with a through hole, one end of the rotary shaft penetrates through the through hole and extends out of the shell, a bearing is arranged between the rotary shaft and the shell, the bearing is arranged at the inner side of the through hole, an oil seal bushing is sleeved at a position corresponding to the through hole in the rotary shaft, a sealing ring is arranged between the inner ring surface of the oil seal bushing and the outer ring surface of the rotary shaft, the sealing ring is arranged at one side, close to the interior of the shell, of the oil seal bushing, and an oil seal is arranged between the outer ring surface of the oil seal; one end, facing the inside of the shell, of the oil seal bushing abuts against the end face of the bearing, and the other end of the oil seal bushing extends out of the end face of the shell. The utility model discloses a set up the oil blanket bush in the pivot, utilize the outer anchor ring of oil blanket bush as the installation face of oil blanket, increased the epaxial axial and utilized the space, solved the pivot because the axial space is nervous and be difficult to set up seal structure's problem.
Description
Technical Field
The utility model relates to a seal structure, in particular to pivot seal structure.
Background
The through groove on the rotating shaft of some equipment is provided with a spline or a thread, and the spline or the thread is connected with a working machine. When a spline or a thread is machined, due to the machining mode (gear hobbing head), the axial length occupied after the actual machining of the spline or the thread is completed is larger than the effective length of the spline or the thread, the occupied axial length of redundant parts cannot be directly utilized during machining, other parts on a rotating shaft can occupy most of the axial length, and in some rotating shafts with compact designs, the axial length is very limited, and the remaining axial space is difficult to be utilized to arrange sealing structures such as oil seals.
Disclosure of Invention
The utility model aims at solving epaxial spline or screw thread and can having taken most axial space in the pivot in addition other parts, remaining axial space is difficult to arrange seal structure's problem, provides a pivot seal structure, can effectively solve above-mentioned problem.
The utility model aims at realizing through the following technical scheme: a rotating shaft sealing structure comprises a shell and a rotating shaft, wherein a through hole is formed in the shell, one end of the rotating shaft penetrates through the through hole and extends out of the shell, a bearing is arranged between the rotating shaft and the shell and is arranged on the inner side of the through hole, an oil seal bushing is sleeved on the rotating shaft at a position corresponding to the through hole, a sealing ring is arranged between the inner ring surface of the oil seal bushing and the outer ring surface of the rotating shaft and is arranged on one side, close to the interior of the shell, of the oil seal bushing, and an oil seal is arranged between the outer ring surface of the oil seal bushing and the inner wall of; one end, facing the inside of the shell, of the oil seal bushing abuts against the end face of the bearing, and the other end of the oil seal bushing extends out of the end face of the shell.
The utility model discloses in, through set up the oil blanket bush in the pivot, utilize the outer anchor ring of oil blanket bush as the installation face of oil blanket. When the axial space of the rotating shaft is tense, the oil seal bushing can be locally arranged at the positions of the spline end part or the thread end part where the oil seal cannot be directly installed, and only one section of axial length for installing the sealing ring needs to be reserved between the oil seal and the rotating shaft. The end, extending out of the end face of the shell, of the oil seal bushing can serve as a positioning end face, and the positioning end face can be matched with end faces of other parts to achieve axial positioning of the rotating shaft.
Preferably, the shaft hole is in transition fit with the rotating shaft.
Preferably, one end of the oil seal bushing facing the outer side of the shell is provided with a threaded hole. When the oil seal bushing is required to be disassembled, the threaded hole can be connected with a disassembling tool, so that the oil seal bushing is convenient to disassemble.
Preferably, the seal ring groove on the inner annular surface of the oil seal bushing is embedded with the seal ring. The sealing ring groove is used for connecting the sealing ring and positioning the sealing ring.
The utility model has the advantages that: the utility model discloses a set up the oil blanket bush in the pivot, utilize the outer anchor ring of oil blanket bush as the installation face of oil blanket, can effectively increase the epaxial axial utilization space of pivot, effectively solved the pivot because the axial space is nervous and be difficult to set up seal structure's problem.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic structural view of the oil seal bushing.
In the figure: 1. casing, 2, pivot, 3, bearing, 4, oil blanket bush, 5, oil blanket, 6, sealing washer, 7, shaft hole, 8, sealing washer groove, 9, screw hole.
Detailed Description
The invention will be further described with reference to the following detailed description and accompanying drawings.
Example (b): as shown in fig. 1 to 3, a rotary shaft sealing structure includes a housing 1 and a rotary shaft 2. One end of the shell 1 is provided with a through hole. One end of the rotating shaft 2 penetrates through the through hole and extends out of the shell 1. And a bearing 3 is arranged between the rotating shaft and the shell. The bearing is arranged on the inner side of the through hole. And an oil seal bushing 4 is arranged on the rotating shaft 2. The oil seal bush 4 is annular. The oil seal bush 4 is made of 20CrMnTi material. The oil seal bushing 4 is sleeved on the rotating shaft 2. And the oil seal bushing 4 is in transition fit with the rotating shaft 2. The oil seal bush 4 is arranged on the rotating shaft 2 at a position corresponding to the through hole. The end of the oil seal bush 4 facing the inside of the housing abuts against the end face of the bearing. The other end of the oil seal bush 4 extends out of the end face of the housing 1. And a sealing ring groove 8 is formed in the inner annular surface of the oil seal bushing 4. The seal ring groove 8 is provided on the side of the oil seal bushing 4 near the inside of the housing. The sealing ring groove 8 is an annular groove. The cross section of the seal ring groove 8 is rectangular. And a sealing ring 6 is arranged between the sealing ring groove 8 and the outer ring surface of the rotating shaft 2. The sealing ring 6 engages in the sealing ring groove 8. The seal ring 6 is in sealing contact with the outer annular surface of the rotating shaft 2. An oil seal 5 is arranged between the outer ring surface of the oil seal bush 4 and the inner wall of the through hole. The roughness of the outer annular surface of the oil seal bush 4 is processed in accordance with the roughness required when the oil seal 5 is mounted. And a threaded hole 9 is formed in one end, facing the outside of the shell 1, of the oil seal bushing 4. In this embodiment, the two threaded holes 9 are symmetrically formed on two sides of the oil seal bushing 4. When the oil seal bushing 4 needs to be disassembled, the threaded hole can be connected with a disassembling tool, so that the oil seal bushing 4 is convenient to disassemble.
The utility model discloses in, through set up the oil blanket bush in the pivot, utilize the outer anchor ring of oil blanket bush as the installation face of oil blanket. When the axial space of the rotating shaft is tense, the oil seal bushing can be locally arranged at the positions of the spline end part or the thread end part where the oil seal cannot be directly installed, and only one section of axial length for installing the sealing ring needs to be reserved between the oil seal and the rotating shaft. The end, extending out of the end face of the shell, of the oil seal bushing can serve as a positioning end face, and the positioning end face can be matched with end faces of other parts to achieve axial positioning of the rotating shaft.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.
Claims (4)
1. The utility model provides a pivot seal structure, includes casing (1), pivot (2), be provided with the through-hole on casing (1), outside the through-hole was passed to the one end of pivot (2) extended to casing (1), be provided with bearing (3) between pivot and the casing, bearing (3) set up the inboard at the through-hole, its characterized in that: an oil seal bushing (4) is sleeved at a position, corresponding to the through hole, on the rotating shaft (2), a sealing ring is arranged between the inner annular surface of the oil seal bushing (4) and the outer annular surface of the rotating shaft (2), the sealing ring (6) is arranged on one side, close to the interior of the shell (1), of the oil seal bushing (4), and an oil seal (5) is arranged between the outer annular surface of the oil seal bushing (4) and the inner wall of the through hole; one end, facing the inside of the shell (1), of the oil seal bushing (4) abuts against the end face of the bearing (3), and the other end of the oil seal bushing (4) extends out of the end face of the shell (1).
2. A rotary shaft seal structure according to claim 1, wherein the oil seal bushing (4) is in transition fit with the rotary shaft (2).
3. A rotary shaft seal structure according to claim 1, wherein the end of the oil seal bushing (4) facing the outside of the housing (1) is provided with a threaded hole (9).
4. A rotary shaft seal structure according to claim 1, 2 or 3, wherein the seal ring groove (8) on the inner annular surface of the oil seal bushing (4) is engaged with the seal ring (6) in the seal ring groove (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920316394.XU CN209856243U (en) | 2019-03-13 | 2019-03-13 | Rotating shaft sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920316394.XU CN209856243U (en) | 2019-03-13 | 2019-03-13 | Rotating shaft sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209856243U true CN209856243U (en) | 2019-12-27 |
Family
ID=68933499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920316394.XU Active CN209856243U (en) | 2019-03-13 | 2019-03-13 | Rotating shaft sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209856243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628293A (en) * | 2020-11-16 | 2021-04-09 | 中国航发西安动力控制科技有限公司 | Combined shaft seal structure for hydraulic pump motor |
-
2019
- 2019-03-13 CN CN201920316394.XU patent/CN209856243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628293A (en) * | 2020-11-16 | 2021-04-09 | 中国航发西安动力控制科技有限公司 | Combined shaft seal structure for hydraulic pump motor |
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