CN212536620U - Double-sealing structure of speed reducer - Google Patents
Double-sealing structure of speed reducer Download PDFInfo
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- CN212536620U CN212536620U CN202021707974.0U CN202021707974U CN212536620U CN 212536620 U CN212536620 U CN 212536620U CN 202021707974 U CN202021707974 U CN 202021707974U CN 212536620 U CN212536620 U CN 212536620U
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Abstract
The utility model discloses a speed reducer double seal structure, include: the device comprises a box body, a rotating shaft, a transparent cover, an oil seal, a space ring and a bearing; the transparent cover, the oil seal, the spacer ring and the bearing are sequentially sleeved on the rotating shaft, the transparent cover is connected with the box body, and the oil seal is positioned in the transparent cover; the box body is provided with a first oil inlet hole and a first oil return hole along the axis direction of the rotating shaft, and the penetrating cover is provided with an oil collecting groove and an oil return groove; the space ring and the bearing are accommodated in the box body, a baffle ring is arranged in the space ring, and a radial second oil inlet hole and a second oil return hole are formed in one side, facing the bearing, of the baffle ring; the oil collecting groove is respectively communicated with the first oil inlet hole and the second oil inlet hole, and the oil return groove is respectively communicated with the first oil return hole and the second oil return hole. The structure can effectively prevent oil leakage.
Description
Technical Field
The utility model relates to a speed reducer seals technical field, concretely relates to speed reducer double seal structure.
Background
In a general speed reducer, the sealing of an input shaft and an output shaft is a mechanical seal and an oil seal, and the sealing mode of the oil seal is widely applied to the speed reducer. In general design, the inner side of the oil seal is directly contacted with lubricating oil. When equipment operation, a large amount of lubricating oil are injected into between oil blanket and the bearing through lubricating system, and under the operation drive of axle, lubricating oil constantly strikes and piles up at the lip of oil blanket, has the oil leak risk, and along with the lapse of time, the phenomenon of ageing can appear in the oil blanket moreover, will take place the oil leak phenomenon this moment.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the double sealing structure of the speed reducer can effectively prevent oil leakage.
The specific technical scheme is as follows:
a double sealing structure of a speed reducer mainly comprises: the device comprises a box body, a rotating shaft, a transparent cover, an oil seal, a space ring and a bearing;
the transparent cover, the oil seal, the spacer ring and the bearing are sequentially sleeved on the rotating shaft, the transparent cover is connected with the box body, and the oil seal is positioned in the transparent cover;
the box body is provided with a first oil inlet hole and a first oil return hole along the axis direction of the rotating shaft, and the penetrating cover is provided with an oil collecting groove and an oil return groove;
the space ring and the bearing are accommodated in the box body, a baffle ring is arranged in the space ring, and a radial second oil inlet hole and a second oil return hole are formed in one side, facing the bearing, of the baffle ring;
the oil collecting groove is respectively communicated with the first oil inlet hole and the second oil inlet hole, and the oil return groove is respectively communicated with the first oil return hole and the second oil return hole.
In the double-sealing structure of the speed reducer, the spacer ring comprises the first ring and the second ring which have different diameters, the first ring with the larger diameter abuts against the bearing, the second ring with the smaller diameter partially extends into and abuts against the transparent cover, the outer diameter of the second ring is matched with an inner hole of the transparent cover on one hand, and a gap is reserved between the outer diameter of the second ring and the inner wall of the box body on the other hand to form a first channel and a second channel, the first channel is communicated with the oil collecting groove and the second oil inlet hole respectively, and the second channel is communicated with the oil return groove and the second channel respectively.
In the double-sealing structure of the speed reducer, the second oil inlet is arranged on the first ring, and the first ring is provided with a first notch corresponding to the second oil inlet.
In the double-sealing structure of the speed reducer, the double-sealing structure of the speed reducer is further characterized in that an oil storage lug protruding out of the inner wall of the spacer is further arranged in the spacer, the oil storage lug is provided with the second oil return hole, and the second oil return hole penetrates through the oil storage lug and the spacer.
In the double sealing structure of the speed reducer, the spacer ring is provided with a second notch at a position corresponding to the second oil return hole.
In the double-sealing structure of the speed reducer, the spacer ring is further provided with a third oil return hole, the third oil return hole is formed in the baffle ring, the radial height of the third oil return hole is smaller than that of the second oil return hole, the radial height is the distance from the third oil return hole or the second oil return hole to the center line of the rotating shaft in the vertical direction, and a third notch is formed in one side, facing the transparent cover, of the baffle ring.
In the double-sealing structure of the speed reducer, the third oil return hole comprises two oil return holes.
In the double-sealing structure of the speed reducer, the double-sealing structure of the speed reducer further has the characteristic that the through cover comprises a stepped hole, the stepped hole comprises a first hole, a second hole and a third hole, the diameter of the first hole is increased in sequence, the first hole is far away from the spacer ring, the third hole is close to the spacer ring, the first hole is matched with the rotating shaft, the oil seal is accommodated in the second hole, and the spacer ring is abutted against the step surface formed by the second hole and the third hole.
In the double seal structure of a speed reducer described above, the first ring of the spacer abuts against the outer ring of the bearing.
In the double seal structure of a speed reducer described above, the second ring of the spacer abuts against the step surface.
The positive effects of the technical scheme are as follows:
the utility model provides a pair of speed reducer double seal structure, through setting up novel space ring, the second inlet port that the oil trap of space ring seting up and passing through the lid communicates to and the second oil gallery that is linked together with the oil gallery that passes through the lid, make lubricating oil flow into through the box inside the oil trap of passing through the lid and flow into the space ring again, the space ring sets up the fender ring moreover, keep off the ring and make lubricating oil stay this one side of bearing make the bearing obtain abundant lubrication, keep off the ring simultaneously and block lubricating oil flow direction oil blanket in order effectively to prevent the oil leak.
Drawings
Fig. 1 is a schematic structural diagram of a double sealing structure of a speed reducer provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transparent cover provided in an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the transparent cover of FIG. 2 along the direction A-A;
fig. 4 is a schematic structural diagram of a spacer ring according to a first direction according to an embodiment of the present invention;
FIG. 5 is a schematic sectional view of the cage of FIG. 4 taken along the line B-B;
fig. 6 is a schematic structural diagram of a spacer ring according to a second direction according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a spacer ring according to an embodiment of the present invention;
fig. 8 is a schematic perspective view of another direction of the space ring according to the embodiment of the present invention.
In the drawings: 1. a box body; 11. a first oil inlet hole; 12. a first oil return hole; 13. a bearing bore; 2. a rotating shaft; 3. a transparent cover; 31. mounting holes; 32. a stepped hole; 321. a first hole; 322. a second hole; 323. a third aperture; 33. an oil sump; 335. a first channel; 336. a second channel; 34. an oil return groove; 35. a spigot end face; 4. oil sealing; 5. a space ring; 51. a first ring; 52. a second ring; 53. a baffle ring; 54. a second oil inlet hole; 55. a second oil return hole; 56. a first notch; 57. a second notch; 58. a third oil return hole; 59. a third notch; 6. a bearing; 61. an inner ring; 62. an outer ring; 7. an oil storage lug.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connect" or "connect" as used herein includes both direct and indirect connections (connections), unless otherwise specified. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a double sealing structure of a speed reducer according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a transparent cover provided in an embodiment of the present invention; fig. 3 is a schematic sectional view of the transparent cover in fig. 2 along the direction a-a.
The double-sealing structure of the speed reducer in the embodiment comprises a box body 1, a rotating shaft 2, a transparent cover 3, an oil seal 4, a space ring 5 and a bearing 6.
Specifically, the transparent cover 3, the oil seal 4, the spacer 5 and the bearing 6 are sequentially sleeved on the rotating shaft 2.
One end of the rotating shaft 2 is positioned in the box body 1, the other end of the rotating shaft extends out of the box body 1, and the transparent cover 3 is sleeved at one end of the rotating shaft 2 extending out of the box body 1 and connected with the side face of the box body 1.
The transparent cover 3 is connected with the box body 1.
Optionally, the transparent cover 3 is provided with a mounting hole 31, and the box body 1 is provided with a fixing hole (not shown) matched with the mounting hole 31; the transparent cover 3 is fixedly connected with the box body 1 through a fastener (not shown).
The oil seal 4 is located in the transparent cover 3.
Specifically, the transparent cover 3 in this embodiment has a stepped structure on the outside, and includes a stepped hole 32 on the inside, where the stepped hole 32 includes a first hole 321, a second hole 322, and a third hole 323 that have successively larger diameters, where the first hole 321 is far away from the spacer 5, the third hole 323 is close to the spacer 5, and the first hole 321 is matched with the rotating shaft 2.
The oil seal 4 is accommodated in the second hole 322, and specifically, the end face of the oil seal 4 abuts on the stepped surface formed by the first hole 321 and the second hole 322.
Specifically, the portion of the spacer 5 protrudes into the third hole 323, one end protruding into the third hole 323 is a first end, and an end surface of the first end of the spacer 5 abuts against a step surface formed by the second hole 322 and the third hole 323.
The first end of the space ring 5 is matched with the inner hole of the transparent cover 3.
Specifically, the inner hole of the transparent cover 3 is a third hole 323 of the transparent cover 3, and the inner diameter of the third hole 323 is matched with the outer diameter of the first end of the spacer 5.
Referring to fig. 4 to 6, fig. 4 is a schematic structural view of a spacer ring according to an embodiment of the present invention in a first direction; FIG. 5 is a schematic sectional view of the cage of FIG. 4 taken along the line B-B; fig. 6 is a schematic structural diagram of a spacer ring according to a second direction according to an embodiment of the present invention; fig. 7 is a schematic perspective view of a spacer ring according to an embodiment of the present invention; fig. 8 is a schematic perspective view of another direction of the space ring according to the embodiment of the present invention.
Further, in the present embodiment, the cage 5 includes a first ring 51 and a second ring 52 having different diameters, as shown in fig. 1, the first ring 51 having a larger diameter abuts against the bearing 6, and the second ring 52 having a smaller diameter partially protrudes into and abuts against the transparent cover 3.
In the present embodiment, the second ring 52 of the cage 5 is a first end of the cage 5, and the first ring 51 of the cage 5 is a second end.
Specifically, the first ring 51 abuts against the outer ring 62 of the bearing 6, and the inner ring 61 of the bearing is axially positioned by the stepped surface provided by the rotary shaft 2.
The second ring 52 of the spacer 5 partially extends into the third hole 323, the end surface of the second ring 52 of the spacer 5 abuts against the step surface formed by the second hole 322 and the third hole 323, so as to realize the axial positioning of the spacer 5, the protruding end surface of the third hole 323 is also called the spigot end surface 35 of the transparent cover 3, and the spigot end surface 35 of the transparent cover 3 is not in contact with the end surface of the first end of the spacer 5, but a small gap is left.
Specifically, the third bore 323 inner diameter is matched to the outer diameter of the second ring 52.
As shown in fig. 1 and 3, the transparent cover 3 is opened with an oil collecting groove 33 and an oil returning groove 34.
Specifically, the oil sump 33 and the oil return groove 34 are respectively disposed at opposite sides of the third hole 323 and communicate with the third hole 323.
Preferably, in the present embodiment, the oil collecting groove 33 and the oil returning groove 34 are vertically arranged, so as to adapt to the flowing rule of the lubricating oil from high to low.
In the embodiment, the case 1 is provided with a first oil inlet 11 and a first oil return hole 12 along the axial direction of the rotating shaft 2, the first oil inlet 11 is communicated with the oil collecting groove 33 of the transparent cover 3, and the first oil return hole 12 is communicated with the oil return groove 34 of the transparent cover 3.
The second ring 52 has a gap with the inner wall of the tank 1 to form a first channel 335 and a second channel 336, wherein the first channel 335 is communicated with the oil collecting groove 33, and the second channel 336 is communicated with the oil return groove 34.
Specifically, in the present embodiment, the outer diameter of the second ring 52 of the spacer 5, the oil collection groove 33 of the transparent cover 3, the outer wall of the spigot 35, and the inner wall of the bearing hole 13 of the case 1 enclose a first passage 335, the outer diameter of the second ring 52 of the spacer 5, the oil return groove 34 of the transparent cover 3, the outer wall of the spigot 35, and the inner wall of the bearing hole 13 of the case 1 enclose a second passage 336, the first passage 335 is communicated with the oil collection groove 33 of the transparent cover 3, and the second passage 336 is communicated with the oil return groove 34 of the transparent cover 3.
The space ring 5 and the bearing 6 are accommodated in the box body 1, a baffle ring 53 is arranged inside the space ring 5, and a radial second oil inlet 54 and a second oil return 55 are formed in the space ring 5 on one side of the baffle ring 53 facing the bearing 6.
Specifically, be provided with bearing hole 13 in the box 1, the internal diameter of bearing hole 13 and the outer diameter looks adaptation of second ring 52 of space ring 5 realize the radial positioning to space ring 5, the internal diameter of bearing hole 13 and the outer diameter looks adaptation of bearing 6, and space ring 5 and bearing 6 hold in bearing hole 13.
More specifically, the first ring 51 and the second ring 52 of the cage 5 are all accommodated in the bearing hole 13.
The oil sump 33 communicates with the second oil inlet 54, and the oil return groove 34 communicates with the second oil return hole 55.
Specifically, in the embodiment in which the first passage 335 and the second passage 336 are provided, the oil sump 33 communicates with the second oil inlet 54 through the first passage 335, and the oil return groove 34 communicates with the second oil return hole 55 through the second passage 336.
Alternatively, the second oil inlet 54 is disposed on the first ring 51, and the first ring 51 is provided with a first notch 56 (shown in fig. 7) corresponding to the second oil inlet 54. The width of the first recess 56 is adapted to the width of the oil sump 33.
Alternatively, the second oil inlet hole 54 is provided on the second ring 52, and no notch is needed, and the second oil inlet hole 54 is still located on the side of the baffle ring 53 facing the bearing 6.
A second oil return hole 55 is provided in the second ring 52.
Optionally, in this embodiment, the second oil return holes 55 are aligned with the second oil inlet holes 54 and are both arranged in a vertical direction, so as to adapt to the flowing rule of the lubricating oil from high to low.
In the double sealing structure of the speed reducer in this embodiment, the lubricating oil in the box 1 flows through the oil collecting groove 33 of the transparent cover 3 through the first oil inlet hole 11, and then flows to the second oil inlet hole 54, and enters one side of the spacer ring 5 inside close to the bearing 6, because of the existence of the baffle ring 53, so that the lubricating oil is left on this side, not only can the bearing 6 be lubricated sufficiently, but also the lubricating oil can be prevented from flowing to the oil seal 4, thereby effectively avoiding oil leakage, on the other hand, the lubricating oil flows out of the spacer ring 5 through the second oil return hole 55, and enters the oil return groove 34 of the transparent cover 3, and then flows into the oil sump in the box 1 through the first oil return.
In the embodiment provided with the first channel 335 and the second channel 336, the lubricating oil in the tank 1 flows through the first oil inlet hole 11 of the tank 1 to the oil collecting groove 33 of the transparent cover 3, then flows through the first channel 335 to the second oil inlet hole 54, and on the other hand flows out of the spacer ring 5 through the second oil return hole 55, then flows into the oil return groove 34 of the transparent cover 3 through the second channel 336, and then flows into the oil sump in the tank 1 through the first oil return hole 12 of the tank 1.
As shown in fig. 1 and 7, an oil storage lug 7 protruding out of the inner wall of the spacer 5 is further disposed in the spacer 5, the oil storage lug 7 is provided with a second oil return hole 55, and the second oil return hole 55 penetrates through the oil storage lug 7 and the spacer 5.
Through setting up oil storage lug 7 for lubricating oil storage in spacer ring 5 reaches certain height and just flows out spacer ring 5, and the benefit that sets up like this keeps the lubricating oil of a take the altitude in the assurance spacer ring 5, with the realization to the more abundant lubrication action of bearing 6. The height of the oil storage lug 7 is designed according to actual requirements.
As shown in fig. 6, the spacer 5 is further provided with a second notch 57 at a position corresponding to the second oil return hole 55. The second notch 57 functions to communicate the second oil return hole 55 with the second passage 336.
Optionally, the width of the second notch 57 is adapted to the width of the oil return groove 34.
Further, the spacer ring 5 is further provided with a third oil return hole 58, the third oil return hole 58 is arranged on the retainer ring 53, and the radial height of the third oil return hole 58 is smaller than the radial height of the second oil return hole 55.
The radial height in the present embodiment is a distance from the third oil gallery 58 or the second oil gallery 55 to the center line of the rotary shaft 2 in the vertical direction, depending on the flow characteristics of the lubricating oil.
The spacer 5 is further provided with a third notch 59 on the side of the baffle ring 53 facing the transparent cover 3.
Optionally, there are two third oil return holes 58. The radial heights of the two third oil return holes 58 may be the same or different.
In this embodiment, by providing the third oil return hole 58, when the oil return of the lubricating oil in the spacer 5 is not timely, the lubricating oil can flow out of the spacer 5 through the third oil return hole 58 when the lubricating oil is accumulated to the height of the third oil return hole 58 in the spacer 5 until the lubricating oil flows into the oil pool in the box body 1, so that the oil return and oil leakage prevention effects of the double-seal structure of the speed reducer are better.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A double seal structure of a speed reducer is characterized by comprising: the device comprises a box body, a rotating shaft, a transparent cover, an oil seal, a space ring and a bearing;
the transparent cover, the oil seal, the spacer ring and the bearing are sequentially sleeved on the rotating shaft, the transparent cover is connected with the box body, and the oil seal is positioned in the transparent cover;
the box body is provided with a first oil inlet hole and a first oil return hole along the axis direction of the rotating shaft, and the penetrating cover is provided with an oil collecting groove and an oil return groove;
the space ring and the bearing are accommodated in the box body, a baffle ring is arranged in the space ring, and a radial second oil inlet hole and a second oil return hole are formed in one side, facing the bearing, of the baffle ring;
the oil collecting groove is respectively communicated with the first oil inlet hole and the second oil inlet hole, and the oil return groove is respectively communicated with the first oil return hole and the second oil return hole.
2. The double sealing structure of the speed reducer according to claim 1, wherein the spacer includes a first ring and a second ring having different diameters, the first ring having a larger diameter abuts against the bearing, the second ring having a smaller diameter partially extends into and abuts against the transparent cover, an outer diameter of the second ring is adapted to an inner hole of the transparent cover on one hand, and a gap is left between the outer diameter of the second ring and an inner wall of the case to form a first passage and a second passage, the first passage is respectively communicated with the oil sump and the second oil inlet, and the second passage is respectively communicated with the oil return groove and the second passage.
3. The double seal structure of the speed reducer according to claim 2, wherein the second oil inlet is provided in the first ring, and a first notch is provided in the first ring corresponding to the second oil inlet.
4. The double-sealing structure of the speed reducer according to claim 2, wherein an oil storage lug protruding out of an inner wall of the spacer is further disposed in the spacer, the oil storage lug is provided with the second oil return hole, and the second oil return hole penetrates through the oil storage lug and the spacer.
5. The double seal structure of the speed reducer according to claim 4, wherein the spacer is provided with a second notch at a position corresponding to the second oil return hole.
6. The double sealing structure of the speed reducer according to claim 5, wherein the spacer ring is further provided with a third oil return hole, the third oil return hole is provided on the baffle ring, a radial height of the third oil return hole is smaller than a radial height of the second oil return hole, the radial height is a distance from the third oil return hole or the second oil return hole to a center line of the rotating shaft in a vertical direction, and a third notch is further provided on a side of the baffle ring facing the transparent cover.
7. The double seal structure of the speed reducer according to claim 6, wherein the number of the third oil return holes is two.
8. The double seal structure of the speed reducer according to any one of claims 2 to 7, wherein the through cover includes a stepped hole, and the stepped hole includes a first hole, a second hole, and a third hole having successively larger diameters, wherein the first hole is distant from the spacer, the third hole is close to the spacer, the first hole is fitted to the rotating shaft, the oil seal is accommodated in the second hole, and the spacer abuts against a step surface formed by the second hole and the third hole.
9. The double seal structure of a speed reducer according to claim 8, wherein the first ring of the spacer abuts against an outer ring of the bearing.
10. The double seal structure for a speed reducer of claim 8, wherein the second ring of the spacer abuts against the step surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021707974.0U CN212536620U (en) | 2020-08-14 | 2020-08-14 | Double-sealing structure of speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021707974.0U CN212536620U (en) | 2020-08-14 | 2020-08-14 | Double-sealing structure of speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212536620U true CN212536620U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021707974.0U Active CN212536620U (en) | 2020-08-14 | 2020-08-14 | Double-sealing structure of speed reducer |
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| CN (1) | CN212536620U (en) |
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2020
- 2020-08-14 CN CN202021707974.0U patent/CN212536620U/en active Active
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