CN220770096U - External oil seal device and reduction gearbox - Google Patents
External oil seal device and reduction gearbox Download PDFInfo
- Publication number
- CN220770096U CN220770096U CN202322362126.0U CN202322362126U CN220770096U CN 220770096 U CN220770096 U CN 220770096U CN 202322362126 U CN202322362126 U CN 202322362126U CN 220770096 U CN220770096 U CN 220770096U
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- oil seal
- seal
- box body
- external oil
- sealing box
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- 230000009467 reduction Effects 0.000 title claims abstract description 33
- 239000003921 oil Substances 0.000 claims abstract description 153
- 238000007789 sealing Methods 0.000 claims abstract description 90
- 238000012856 packing Methods 0.000 claims abstract description 54
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005086 pumping Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 16
- 230000008859 change Effects 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 208000032765 Device extrusion Diseases 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Sealing Devices (AREA)
- General Details Of Gearings (AREA)
Abstract
The utility model belongs to the field of reduction boxes of pumping units, and particularly relates to an external oil seal device and a reduction box. The technical problem solved by the utility model is that the external oil seal device in the prior art is troublesome to maintain and has high cost. The utility model discloses an external oil seal device, which comprises a sealing box body, wherein the sealing box body is sleeved outside a rotating shaft, one end, close to a shaft seat of the rotating shaft, of the sealing box body is provided with an oil seal packing for preventing lubricating oil from leaking when the sealing box body is used, the external oil seal device also comprises a pressing device, the pressing device is arranged in the other end of the sealing box body and used for pressing the oil seal packing, and the pressing device is provided with a rotating shaft through hole for the rotating shaft to pass through and a position adjusting structure is arranged between the pressing device and the sealing box body. The utility model also discloses a reduction gearbox using the external oil seal device. The utility model can achieve the technical effects of convenient and quick maintenance and low cost when the external oil seal device is maintained.
Description
Technical Field
The utility model belongs to the field of reduction boxes, and particularly relates to an external oil seal device and a reduction box.
Background
The oil pumping machine reduction gearbox is a main device of extraction equipment, and comprises a box body and an output shaft extending out of the box body, wherein a shaft hole for the output shaft to extend out is formed in the box body, a bearing and an oil seal which is dynamically sealed with the bearing are arranged in the shaft hole, the oil seal is used for preventing lubricating oil in the box body from leaking from the shaft hole, an oil seal cover plate is further sleeved on the part of the bearing, which is leaked out of the box body, of the oil seal cover plate, the oil seal cover plate is connected into a bolt hole formed in the box body through bolt fastening, and the oil seal is directly plugged in the shaft hole.
The Chinese patent with the authorized bulletin number of CN 212717904U and the authorized bulletin day of 2021.03.16 discloses an external oil seal device of a reduction gearbox of an oil pumping unit, which comprises a sealing ring body, a fixed bracket and a pressing piece, wherein the sealing ring body is tightly held outside an output shaft, the fixed bracket is fixedly connected with a box body or an oil seal cover plate of the reduction gearbox, the pressing piece is arranged on the fixed bracket and is used for directly or indirectly pressing the sealing ring body in the axial direction to press the oil seal cover plate, and an oil leakage gap between the oil seal cover plate and the output shaft is blocked; the clamping piece is used for clamping the outer peripheral surface of the sealing sleeve body, so that the corresponding parts of the sealing sleeve body and the output shaft are tightly pressed. According to the device, the sealing ring body, the pressing piece and the enclasping piece are arranged outside the reduction gearbox, the sealing ring body is deformed through the pressing piece and the enclasping piece, and the sealing effect is ensured by controlling the deformation quantity of the sealing ring body.
The external oil seal device of the oil pumping unit reduction gearbox can achieve the technical effect that the oil seal which fails in the reduction gearbox can be replaced without disassembling the whole reduction gearbox, and the oil seal can be revalidated only by deforming the sealing ring body, but the deformation of the sealing ring body is irreversible, after a period of use, the sealing ring body cannot deform again, the whole sealing ring body needs to be replaced again, and meanwhile, the fixing support is fixedly connected with the gearbox body or the oil seal cover plate, so that the maintenance cost is high and the maintenance is troublesome.
Disclosure of Invention
The utility model aims to provide an external oil seal device and a reduction gearbox, which are used for solving the technical problems of troublesome maintenance and high cost of the external oil seal device in the prior art.
In order to achieve the above purpose, the technical scheme of the external oil seal device provided by the utility model is as follows:
the utility model provides an external oil blanket device, is including being used for the cover outside the pivot sealing letter body, and the one end that is close to the axle bed of pivot when sealing letter body uses is equipped with the oil blanket filler that is used for preventing lubricating oil leakage, and external oil blanket device is still including setting up in the sealing letter body other end and being used for the closing device of extrusion oil blanket filler, closing device have be used for supplying the pivot perforation that the pivot passed and with sealing letter body between be equipped with position control structure.
The beneficial effects are as follows: the utility model is an improved utility model. Through setting up the oil blanket packing in the seal box to set up position adjustment structure between closing device and seal box, thereby when oil blanket department oil leak, only need make closing device extrusion oil blanket packing can seal, seal effect only with the deformation ability of oil blanket packing about, not receive other factor restriction, the technician can control the deformation of oil blanket packing through the distance of controlling closing device motion, and then guarantee seal effect, reach extension oil blanket life, improve maintenance efficiency's technical effect. Compared with the existing device, after the external oil seal device disclosed by the utility model fails, only the oil seal packing is needed to be replaced, the support frame is not needed to be installed and detached, the maintenance is convenient and quick, the whole device is not needed to be replaced, and the maintenance cost is low. Therefore, the utility model can achieve the technical effects of convenient and quick maintenance and low cost when the external oil seal device is maintained.
Further, the pressing device is a pressing cap with one end positioned outside the sealing box body.
The beneficial effects are as follows: the pressing device is arranged to be the pressing cap with one end positioned outside the sealing box body, so that the extrusion degree of the pressing cap to the oil seal packing can be conveniently adjusted.
Further, the pressing cap is in threaded connection with the sealing box body, and threads between the sealing box body and the pressing cap form the position adjusting structure.
The beneficial effects are as follows: through with pressing the cap spiro union on the seal letter body, can compress the oil blanket packing in succession, can control the deformation volume of oil blanket packing more conveniently.
Furthermore, a spanner tool matching structure is arranged at one end of the press cap, which is positioned outside the sealing box body.
The beneficial effects are as follows: the dynamic pressure cap is rotated by the spanner, so that a power arm can be effectively increased, and a maintenance person can conveniently screw the dynamic pressure cap.
Still further, closing device includes clamping ring and connecting device that are used for extrudeing the oil blanket packing, and connecting device's one end is connected on the clamping ring, and the other end is located the seal box outside, and position adjustment structure locates between seal box and connecting device are located the one end of seal box outside.
The beneficial effects are as follows: through setting up clamping ring, connecting device and position control structure, can realize the compression to the oil blanket packing, adjust the clamping ring to the extrusion degree of oil blanket packing.
Still further, still include screw tensioning mechanism, fixedly be equipped with the screw mount pad on the outer wall of sealed letter body, the one end that connecting device is located the sealed letter body is equipped with the screw mounting hole, and screw tensioning mechanism passes screw mount pad and screw mounting hole setting, and screw tensioning mechanism, screw mount pad and screw mounting hole constitute position control structure.
The beneficial effects are as follows: through the screw rod tensioning mechanism, the pressing device can continuously extrude the oil seal packing, and the deformation quantity of the oil seal packing can be controlled more conveniently.
Furthermore, a sealing groove is arranged on one side of the sealing box body close to the rotating shaft, and a sealing ring is arranged in the sealing groove.
The beneficial effects are as follows: through setting up seal groove and sealing washer, can prevent the lubricating oil leakage at the oil blanket packing on preventing the basis that lubricating oil revealed, the secondary prevents that lubricating oil from revealing, has further prolonged the oil blanket life-span.
In order to achieve the above purpose, the technical scheme of the reduction gearbox provided by the utility model is as follows:
the utility model provides a reducing gear box, includes external oil seal device, external oil seal device is including being used for the cover outside the pivot seal letter body, and the one end that is close to the axle bed of pivot when the seal letter body was used is equipped with the oil blanket filler that is used for preventing lubricating oil leakage, and external oil seal device still is including setting up in the seal letter body other end and being used for extrudeing the closing device of oil blanket filler, and closing device has the pivot perforation that is used for supplying the pivot to pass and is equipped with position control structure with between the seal letter body.
The beneficial effects are as follows: the utility model is an improved utility model. Through setting up the oil blanket packing in the seal box to set up position adjustment structure between closing device and seal box, thereby when oil blanket department oil leak, only need make closing device extrusion oil blanket packing can seal, seal effect only with the deformation ability of oil blanket packing about, not receive other factor restriction, the technician can control the deformation of oil blanket packing through the distance of controlling closing device motion, and then guarantee seal effect, reach extension oil blanket life, improve maintenance efficiency's technical effect. Compared with the existing device, after the external oil seal device in the reduction gearbox fails, only the oil seal packing is needed to be replaced, the support frame is not needed to be installed or detached, the maintenance is convenient and quick, the whole device is not needed to be replaced, and the maintenance cost is low. Therefore, the utility model can achieve the technical effects of convenient and quick maintenance and low cost when the oil leakage problem of the external oil seal of the speed reducer is maintained.
Further, the pressing device is a pressing cap with one end positioned outside the sealing box body.
The beneficial effects are as follows: the pressing device is arranged to be the pressing cap with one end positioned outside the sealing box body, so that the extrusion degree of the pressing cap to the oil seal packing can be conveniently adjusted.
Further, the pressing cap is in threaded connection with the sealing box body, and threads between the sealing box body and the pressing cap form the position adjusting structure.
The beneficial effects are as follows: through with pressing the cap spiro union on the seal letter body, can compress the oil blanket packing in succession, can control the deformation volume of oil blanket packing more conveniently.
Furthermore, a spanner tool matching structure is arranged at one end of the press cap, which is positioned outside the sealing box body.
The beneficial effects are as follows: the dynamic pressure cap is rotated by the spanner, so that a power arm can be effectively increased, and a maintenance person can conveniently screw the dynamic pressure cap.
Still further, closing device includes clamping ring and connecting device that are used for extrudeing the oil blanket packing, and connecting device's one end is connected on the clamping ring, and the other end is located the seal box outside, and position adjustment structure locates between seal box and connecting device are located the one end of seal box outside.
The beneficial effects are as follows: through setting up clamping ring, connecting device and position control structure, can realize the compression to the oil blanket packing, adjust the clamping ring to the extrusion degree of oil blanket packing.
Still further, still include screw tensioning mechanism, fixedly be equipped with the screw mount pad on the outer wall of sealed letter body, the one end that connecting device is located the sealed letter body is equipped with the screw mounting hole, and screw tensioning mechanism passes screw mount pad and screw mounting hole setting, and screw tensioning mechanism, screw mount pad and screw mounting hole constitute position control structure.
The beneficial effects are as follows: through the screw rod tensioning mechanism, the pressing device can continuously extrude the oil seal packing, and the deformation quantity of the oil seal packing can be controlled more conveniently.
Furthermore, a sealing groove is arranged on one side of the sealing box body close to the rotating shaft, and a sealing ring is arranged in the sealing groove.
The beneficial effects are as follows: through setting up seal groove and sealing washer, can prevent the lubricating oil leakage at the oil blanket packing on preventing the basis that lubricating oil revealed, the secondary prevents that lubricating oil from revealing, has further prolonged the oil blanket life-span.
Further, the sealing box body is provided with a bolt hole, and the sealing box body is fixedly arranged on the box body of the reduction gearbox or the oil seal cover plate through bolts.
The beneficial effects are as follows: through adopting the bolt can dismantle fixed seal letter body, can change the seal letter body when needing to change the seal letter body, simultaneously, when direct change oil blanket packing is comparatively difficult, also can change the oil blanket packing after removing the seal letter body.
Further, the bolt holes are bar-shaped bolt holes.
The beneficial effects are as follows: through the bar bolt hole, can make sealed letter body adapt to the bolt hole pitch of different specifications on the box of reducing gear box or the oil blanket apron.
Drawings
FIG. 1 is a partial exploded view of embodiment 1 of the external oil seal device of the present utility model;
FIG. 2 is a bottom view of a seal housing of embodiment 1 of the external oil seal device of the present utility model;
FIG. 3 is a partial exploded view of the press cap of embodiment 1 of the external oil seal device of the present utility model;
FIG. 4 is a top view of a press cap of embodiment 1 of the external oil seal device of the present utility model;
fig. 5 is a schematic diagram of a wrench according to embodiment 1 of the external oil seal device of the present utility model.
In the figure: 1. sealing the box body; 2. an oil seal filler; 3. a flange plate; 4. a bar-shaped bolt hole; 5. sealing grooves; 6. a compacting device; 61. a clamping groove; 7. a wrench; 8. a rotating shaft.
Detailed Description
The present utility model is described in further detail below with reference to examples.
The oil seal packing 2 in the present utility model refers to a deformable material for sealing the rotary shaft 8 and preventing leakage of lubricating oil, for example, a packing of aramid fiber, etc., and its size specification may be the same as or different from that of the original oil seal packing 2.
The embodiment 1 of the external oil seal device provided by the utility model comprises the following components:
as shown in fig. 1-5, the utility model discloses an external oil seal device, which comprises a sealing box body 1 sleeved outside a rotating shaft 8, wherein an oil seal packing 2 used for preventing lubricating oil from leaking is arranged in one end of a shaft seat, which is close to the rotating shaft, of the sealing box body 1 when the external oil seal device is used, the external oil seal device also comprises a pressing device 6 which is arranged at one end of the sealing box body 1, which is far away from the shaft seat of the rotating shaft, and is used for pressing the oil seal packing 2, the pressing device 6 is provided with a rotating shaft through hole used for the rotating shaft 8 to pass through, and a position adjusting structure is arranged between the pressing device 6 and the sealing box body 1, and the position adjusting structure can enable the pressing device 6 to move in the sealing box body 1 along the axial direction of the rotating shaft 8. One side of the sealing box body 1, which is close to the shaft seat of the rotating shaft, is provided with a flange plate 3, the flange plate 3 is provided with a sealing groove 5, and a sealing ring for preventing lubricating oil from leaking is arranged in the sealing groove 5. In this embodiment, the pressing device 6 is a pressing cap with one end located outside the sealing box body 1, the pressing cap is screwed on the sealing box body 1, and the threads between the sealing box body 1 and the pressing cap form a position adjusting structure. The external oil seal device can be matched with the wrench 7 for rotating the press cap, the press cap is provided with clamping grooves 61 for enabling the wrench 7 to be clamped on the press cap, and the number of the clamping grooves 61 is at least four. In the present embodiment, the wrench 7 is a hook wrench, and the number of the clamping grooves 61 is six, but in other embodiments, the number of the clamping grooves 61 may be five or more.
Taking the example of using the embodiment 1 of the external oil seal device disclosed by the utility model on a reduction gearbox as an example, the installation, use and maintenance flow of the external oil seal device is described in a simple way, and the specific steps are as follows:
when the external oil seal device is installed, the following steps are carried out: firstly, installing a sealing ring in a sealing groove 5; secondly, an oil seal packing 2 is arranged in the sealing box body 1, and the sealing box body 1 is fixedly connected to a box body or an oil seal cover plate of the reduction gearbox through bolts; thirdly, the pressing cap is screwed on the sealing box body 1. In this embodiment, a strip bolt hole 4 is provided on the flange 3 of the seal box 1, and the seal box 1 is fixed on the box body or the oil seal cover plate of the reduction gearbox by bolts. However, in other embodiments, the seal housing 1 may be pinned to the housing of the reduction gearbox or to the oil seal cover plate.
After the oil seal is found to be invalid, the hook wrench can be used for hooking the clamping groove 61 on the pressing cap, the pressing cap is rotated and enabled to press the oil seal packing 2, and after the oil seal packing 2 is deformed, the sealing capability of the oil seal is restored. An external oil seal device is arranged outside the reduction gearbox, and is matched with the original oil seal, so that the sealing area of the oil seal is increased, and the sealing effect is enhanced.
When maintaining this external oil blanket device, can install following step and go on: the first step, the press cap is disassembled; secondly, replacing the oil seal packing 2, namely clamping the oil seal packing 2 out, and directly taking down the sealing box body 1 to replace the oil seal packing 2; and thirdly, reinstalling the device. The seal ring can also be replaced if necessary. Compared with the prior art, when maintaining this external oil blanket device, need not install and dismantle the support frame, need not change whole device, only need change the oil blanket packing 2 can, easy and fast just cost of maintenance is low. Meanwhile, the pressing device 6 is arranged to be a pressing cap which is in threaded connection with the sealing box body 1 and one end of which is located outside the sealing box body 1, so that the extrusion degree of the pressing cap to the oil seal packing 2 can be conveniently adjusted, the oil seal packing 2 can be continuously compressed, and the deformation quantity of the oil seal packing 2 can be conveniently and rapidly controlled. By arranging the hook wrench and the clamping groove 61, the power arm can be effectively increased, and the cap can be conveniently pressed by a maintainer. Through setting up a plurality of draw-in grooves 61, can make things convenient for maintainer to twist the pressure cap from different angles, avoid appearing draw-in groove 61 and lie in the inconvenient hard condition of maintainer appearance that leads to under the pressure cap. On the basis that oil blanket packing 2 prevents that lubricating oil from revealing, set up seal groove 5 and sealing washer, can prevent the lubricating oil from revealing for the second time, further prolonged the oil blanket life-span.
Specific embodiment 2 of the external oil seal device provided by the utility model:
the main difference between this embodiment and embodiment 1 is that: in this embodiment, the compressing device 6 includes a compression ring for compressing the oil seal packing 2, a connecting device and a screw tightening mechanism, one end of the connecting device is connected on the compression ring, the other end is located outside the sealing box body 1, a screw mounting seat is fixedly arranged on the outer wall of the sealing box body 1, one end of the connecting device located outside the sealing box body 1 is provided with a screw mounting hole, the screw tightening mechanism passes through the screw mounting seat and the screw mounting hole, and the screw tightening mechanism, the screw mounting seat and the screw mounting hole form a position adjusting structure. With respect to embodiment 1, this embodiment provides a pressing device 6 other than a press cap, and the pressing device 6 is controlled by a screw tightening mechanism to continuously press the oil-seal packing 2.
Specific embodiment 3 of the external oil seal device provided by the utility model:
the main difference between this embodiment and embodiment 1 is that: in this embodiment, the screw cap does not include a screw thread and a clamping groove 61, the external oil seal device further includes a screw tightening mechanism, a screw mounting seat is fixedly arranged on the outer wall of the sealing box body 1, a screw mounting hole is arranged at one end of the press cap, which is positioned outside the sealing box body 1, the screw tightening mechanism passes through the screw mounting seat and the screw mounting hole, and the screw tightening mechanism, the screw mounting seat and the screw mounting hole form a position adjusting structure. Compared with the embodiment 1, the embodiment provides a device for controlling the pressing cap to press the oil seal packing 2 through the screw rod tensioning mechanism, and the technical effect of recovering the oil seal capability of the failed oil seal can be achieved though the device is different from a threaded connection mode.
The embodiment 1 of the reduction gearbox provided by the utility model comprises the following components:
the utility model also discloses a reduction gearbox which comprises an external oil seal device, wherein the external oil seal device is any one of the specific embodiments 1-3 of the external oil seal device provided by the utility model. In the reduction gearbox, a strip-shaped bolt hole 4 is formed in a sealing box body 1, and the sealing box body 1 is fixedly arranged on a box body or an oil seal cover plate of the reduction gearbox through bolts. Through bar bolt hole 4, can make sealed letter body 1 adapt to the bolt hole pitch of different specifications on the box of reducing gear box or the oil blanket apron. Through adopting the bolt can dismantle fixed seal letter body 1, can change seal letter body 1 when needs change seal letter body 1, simultaneously, when direct change oil blanket packing 2 is comparatively difficult, also can change oil blanket packing 2 after removing seal letter body 1. The reduction gearbox disclosed by the utility model can also achieve the technical effects of convenience and rapidness in maintenance and low cost when the reduction gearbox with oil seal leaked is maintained.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides an external oil blanket device, is including being used for the cover outside the pivot seal letter body, its characterized in that, be equipped with the oil blanket filler that is used for preventing lubricating oil leakage in the one end that is close to the axle bed of pivot when the seal letter body is used, external oil blanket device is still including setting up the seal letter body other end and be used for extrudeing the closing device of oil blanket filler, closing device has the pivot perforation that is used for supplying the pivot to pass and is equipped with position control structure with the seal letter body between.
2. An external oil seal device as claimed in claim 1 wherein said hold down means is a press cap having one end located outside said seal housing.
3. An external oil seal device as claimed in claim 2 wherein said press cap is threadably connected to said seal body, and wherein threads between said seal body and said press cap form said position adjustment structure.
4. An external oil seal device according to claim 3, wherein a wrench tool mating structure is provided on an end of the press cap located outside the seal housing.
5. The external oil seal device according to claim 1, wherein the pressing device comprises a pressing ring for pressing the oil seal packing and a connecting device, one end of the connecting device is connected to the pressing ring, the other end of the connecting device is located outside the sealing box, and the position adjusting structure is arranged between the sealing box and one end of the connecting device located outside the sealing box.
6. The external oil seal device according to claim 5, further comprising a screw tightening mechanism, wherein a screw mounting seat is fixedly arranged on the outer wall of the sealing box body, a screw mounting hole is formed in one end of the connecting device, which is located outside the sealing box body, the screw tightening mechanism passes through the screw mounting seat and the screw mounting hole, and the screw tightening mechanism, the screw mounting seat and the screw mounting hole form the position adjusting structure.
7. The external oil seal device according to claim 1, wherein a sealing groove is arranged on one side of the sealing box body close to the rotating shaft, and a sealing ring is arranged in the sealing groove.
8. A reduction gearbox comprising an external oil seal arrangement as claimed in any one of claims 1 to 7.
9. The reduction gearbox as set forth in claim 8, wherein the sealing box body is provided with bolt holes, and the sealing box body is fixedly installed on the box body or the oil seal cover plate of the reduction gearbox through bolts.
10. A reduction gearbox according to claim 9, wherein the bolt holes are bar bolt holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362126.0U CN220770096U (en) | 2023-08-31 | 2023-08-31 | External oil seal device and reduction gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362126.0U CN220770096U (en) | 2023-08-31 | 2023-08-31 | External oil seal device and reduction gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220770096U true CN220770096U (en) | 2024-04-12 |
Family
ID=90613349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322362126.0U Active CN220770096U (en) | 2023-08-31 | 2023-08-31 | External oil seal device and reduction gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220770096U (en) |
-
2023
- 2023-08-31 CN CN202322362126.0U patent/CN220770096U/en active Active
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