CN215405133U - Bearing seat assembly, outer barrel body assembly and washing machine - Google Patents
Bearing seat assembly, outer barrel body assembly and washing machine Download PDFInfo
- Publication number
- CN215405133U CN215405133U CN202120636783.8U CN202120636783U CN215405133U CN 215405133 U CN215405133 U CN 215405133U CN 202120636783 U CN202120636783 U CN 202120636783U CN 215405133 U CN215405133 U CN 215405133U
- Authority
- CN
- China
- Prior art keywords
- hole
- reinforcing
- mounting
- bearing seat
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The utility model discloses a bearing seat assembly, an outer barrel body assembly and a washing machine, wherein the bearing seat assembly is arranged in a sunken area of the inner end wall of the outer barrel body of the washing machine, the bearing seat assembly comprises a reinforcing piece and a bearing seat, a mounting through hole is formed in the center of the reinforcing piece, the reinforcing piece is obliquely arranged from the periphery to the middle part along the central line of the mounting through hole, so that the middle part of the reinforcing piece is convexly arranged towards one side, the reinforcing piece is used for being accommodated in the sunken area, and the bearing seat is sleeved in the mounting through hole and is connected with the reinforcing piece in a sleeved mode; the bearing seat assembly is arranged in the sunken area, so that the volume of the outer barrel body of the washing machine can be reduced, the whole volume of the washing machine is reduced, and the space utilization rate of the washing machine is improved compared with the washing machine with the same volume.
Description
Technical Field
The utility model relates to the technical field of washing machines, in particular to a bearing seat assembly, an outer barrel body assembly and a washing machine.
Background
At present, a washing machine becomes a household appliance which is visible everywhere in daily life, wherein a bearing seat in the washing machine is a key component for connecting and supporting a bearing and a shaft, but the bearing seat has a certain height, when the bearing seat is assembled with a washing machine barrel body, the depth of the washing machine is increased, the occupied area of the washing machine per unit volume is reduced compared with the washing machine with the same volume, and the space utilization rate is low.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a bearing seat assembly, an outer barrel body assembly and a washing machine, and aims to solve the problem of low space utilization rate of the washing machine caused by the assembly of a bearing seat and a washing machine barrel body.
In order to achieve the above object, the present invention provides a bearing housing assembly, an outer tub assembly and a washing machine, wherein the bearing housing assembly is installed in a recessed region of an inner end wall of an outer tub of the washing machine, and the bearing housing assembly includes:
the center of the reinforcing piece is provided with an installation through hole, the reinforcing piece is obliquely arranged from the periphery to the middle part along the center line of the installation through hole, so that the middle part of the reinforcing piece is convexly arranged towards one side, and the reinforcing piece is used for being accommodated in the concave area; and the number of the first and second groups,
and the bearing block is sleeved in the mounting through hole and is connected with the reinforcing piece in a sleeved mode.
Optionally, the bearing housing comprises:
the mounting column is used for being matched with the bearing and sleeved in the mounting through hole; and the number of the first and second groups,
the connecting columns are arranged on the outer side walls of the mounting columns and extend along the extending direction of the mounting columns, and the connecting columns are used for being connected with the stator of the motor.
Optionally, a plurality of connecting through holes communicated with the mounting through holes are formed in the periphery of the mounting through holes, the connecting through holes are distributed at intervals along the circumferential direction of the mounting through holes, the connecting through holes and the connecting columns are arranged in a one-to-one correspondence manner, and the connecting columns penetrate through the corresponding connecting through holes, so that the bearing seat is mounted on the reinforcement.
Optionally, a plurality of limiting blocks are convexly arranged on the outer side surface of the mounting column, and each limiting block is respectively arranged between two adjacent connecting columns;
the spacing blocks are arranged between two adjacent connecting through holes, and the spacing blocks correspond to the limiting blocks one to one and are connected with the limiting blocks through connecting structures, so that the bearing seat can be detachably mounted on the reinforcing part.
Optionally, the reinforcement comprises:
the reinforcing plate is arranged along the outer contour circumference of the bearing seat, and the center of the reinforcing plate is provided with a mounting through hole;
the first reinforcing ribs are arranged along the periphery of the reinforcing plate; and the number of the first and second groups,
the reinforcing plate is provided with a plurality of second reinforcing ribs, the second reinforcing ribs are arranged on the reinforcing plate and extend along the radial direction of the installation through hole from the periphery of the installation through hole and are connected with the first reinforcing ribs, and the second reinforcing ribs are distributed at intervals along the circumferential direction of the installation through hole.
Optionally, at least one suction through hole is formed in the reinforcing plate between two adjacent second reinforcing ribs.
Optionally, a third reinforcing rib is arranged on the periphery of the reinforcing member, and the third reinforcing rib is arranged on the periphery of the first reinforcing rib and is spaced from the first reinforcing rib along the radial direction of the mounting through hole;
the second reinforcing ribs extend to the third reinforcing ribs along the radial direction of the mounting through holes respectively.
Optionally, the two sides of each second reinforcing rib in the circumferential direction of the mounting through hole are respectively provided with an anti-torsion rib, the two anti-torsion ribs are arranged oppositely, and two ends of each anti-torsion rib are respectively connected with the first reinforcing rib and the third reinforcing rib.
The present invention also provides an outer tub assembly, comprising:
the bearing housing assembly described above; and the number of the first and second groups,
the middle part of the inner end wall of the outer barrel body main body is arranged in a concave mode and is used for installing a bearing seat assembly.
The utility model also provides a washing machine which comprises the outer barrel body assembly.
According to the technical scheme, the bearing seat assembly is integrally arranged in the sunken area of the inner end wall of the outer barrel body of the washing machine, the bearing seat is sleeved on the reinforcing piece through the mounting through hole, the reinforcing piece is obliquely arranged with the central line of the mounting through hole from the periphery to the middle part, and the middle part of the reinforcing piece protrudes towards one side, so that the reinforcing piece is arranged in the sunken area of the inner end wall of the outer barrel body of the washing machine, the depth of the outer barrel body can be reduced, namely the volume of the outer barrel body is reduced, the overall volume of the washing machine is reduced, compared with the washing machine with the same volume, the volume of the inner barrel of the washing machine is improved, and the space utilization rate of the washing machine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of one embodiment of a bearing housing assembly provided in accordance with the present invention;
FIG. 2 is a schematic front view of the bearing housing assembly of FIG. 1;
FIG. 3 is an enlarged schematic view of detail A of FIG. 2;
FIG. 4 is a perspective view of the bearing housing of FIG. 1;
FIG. 5 is a perspective view of the reinforcement member of FIG. 1;
FIG. 6 is a perspective view of an embodiment of an outer tub assembly of a washing machine according to the present invention;
fig. 7 is a schematic cross-sectional view taken along line B-B of fig. 6.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| |
100 | Adsorption through |
231 |
| |
1 | |
24 |
| |
11 | First reinforcing |
25 |
| Connecting |
12 | Second reinforcing |
26 |
| Limiting |
13 | |
261 |
| Reinforcing |
2 | Third reinforcing |
27 |
| Mounting through |
21 | Outer |
200 |
| Connecting through |
22 | Outer barrel body |
210 |
| Reinforcing |
23 | Electric machine | 3 |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
At present, a washing machine becomes a household appliance which is seen everywhere in daily life, wherein a bearing seat in the washing machine is a key component for connecting and supporting a bearing and a shaft, but the bearing seat has a certain height, so that when the bearing seat is assembled with a washing machine barrel body, the depth of the washing machine is increased, the occupied area of the washing machine per unit volume is reduced compared with a washing machine with the same volume, and the space utilization rate is low.
In view of the above, the utility model provides a bearing seat assembly, an outer barrel assembly and a washing machine, and aims to solve the problem of low space utilization rate of the washing machine caused by the assembly of a bearing seat and a washing machine barrel. Fig. 1 to 5 illustrate an embodiment of a bearing housing assembly according to the present invention, and fig. 6 to 7 illustrate an embodiment of an outer tub assembly according to the present invention.
Specifically, referring to fig. 6 to 7, the washing machine includes an outer tub assembly 200 and an inner tub for placing laundry, the outer tub body 210 is connected to the inner tub through a bearing, the outer tub assembly 200 includes an outer tub body 210 and a bearing housing assembly 100, the bearing housing assembly 100 is fittingly installed in a region where a middle portion of an inner end wall of the outer tub body 210 is recessed, and the bearing housing assembly 100 and the outer tub body 210 are integrally formed by injection molding.
Referring to fig. 1 to 2, the bearing housing assembly 100 includes a reinforcement 2 and a bearing housing 1, a mounting through hole 21 is disposed at a center of the reinforcement 2, the reinforcement 2 is inclined from a periphery to a middle portion with respect to a center line of the mounting through hole 21, so that the middle portion of the reinforcement 2 protrudes to one side, the reinforcement 2 is disposed in a recessed area, and the mounting through hole 21 is sleeved with the bearing housing 1 to be connected to the reinforcement 2.
In the technical scheme of the utility model, the bearing seat 1 is sleeved on the reinforcing piece 2 through the mounting through hole 21, and the reinforcing piece 2 is obliquely arranged and protrudes to one side, so that the bearing seat 1 assembly 100 can be arranged in a sunken area of the inner end wall of the outer barrel body of the washing machine, the depth of the outer barrel body of the washing machine can be reduced, the whole volume of the washing machine is reduced, namely the space occupation ratio of the inner barrel of the washing machine is improved compared with the washing machine with the same volume, and the space utilization ratio of the washing machine is improved.
Referring to fig. 1, the bearing seat 1 includes a mounting post 11 and a plurality of connecting posts 12, the mounting post 11 is adapted to be mounted on a bearing, and is sleeved on the mounting through hole 21, the connecting posts 12 are disposed on an outer side wall of the mounting post 11 and extend along an extending direction of the mounting post 11, the connecting posts 12 are used for connecting a stator of the motor 3, the stator of the motor 3 is positioned by being connected to the connecting posts 12, so that the stator of the motor 3 is coaxial with the bearing seat 1, and thus good coaxiality can be maintained between an inner cylinder and an outer tub body 210 of the washing machine and between the stator of the motor 3 and a rotor of the motor 3, and accordingly, power loss caused by different shafts of the stator of the motor 3 and the rotor of the motor 3 is reduced.
It should be noted that, in the present invention, the connection mode of the connection columns 12 and the motor 3 is not limited, and may be a bolt connection or a thread connection, and the number of the connection columns 12 is not limited, and may be 4, 6 or 8, please refer to fig. 1 and fig. 7, in an embodiment of the present invention, the bearing seat 1 has 8 connection columns 12, one end of each connection column 12 connected to the motor 3 is provided with a threaded hole, and each connection column 12 is in thread connection with the motor 3.
Further, a plurality of connect the via hole 22 that communicate with the installation through hole 21 are equipped with at the periphery of installation through hole 21, a plurality of connect the via hole 22 along the circumference interval distribution of installation through hole 21, a plurality of connect the via hole 22 and a plurality of spliced pole 12 one-to-one setting, each spliced pole 12 is worn to locate its connect the via hole 22 that corresponds, so that bearing frame 1 installs in reinforcement 2, spliced pole 12 has the guide effect when reinforcement 2 assembles with bearing frame 1 simultaneously, make things convenient for the staff to assemble, thereby improve assembly efficiency.
Furthermore, a plurality of limiting blocks 13 are convexly arranged on the outer side surface of the mounting column 11, and each limiting block 13 is respectively arranged between two adjacent connecting columns 12; and a spacing block 24 is arranged between two adjacent connecting through holes 22, and each spacing block 24 corresponds to each limiting block 13 one by one and is connected with each other through a connecting structure, so that the bearing seat 1 can be detachably mounted on the reinforcing part 2. The one-to-one corresponding connection between each limiting block 13 and each spacing block 24 realizes the limiting connection between the bearing seat 1 and the reinforcing part 2, and improves the assembly efficiency of the bearing seat assembly 100.
It should be noted that the form of the connection structure is not limited, and may be a threaded connection structure or a snap connection structure.
It should be noted that the bearing seat assembly 100 may be made of cast aluminum material or cast iron material, and in order to reduce the manufacturing cost of the bearing seat assembly 100, the bearing seat assembly 100 is made of cast iron material in the present invention.
In order to improve the torsion resistance of the bearing seat 1 and the maximum torque of the bearing seat 1 and avoid the phenomenon that the bearing seat 1 is separated from the outer barrel body 210 due to huge centrifugal force when the washing machine works, the reinforcing piece 2 comprises a reinforcing plate 23, a first reinforcing rib 25 and a plurality of second reinforcing ribs 26, the reinforcing plate 23 is circumferentially arranged along the outer contour of the bearing seat 1, and the center of the reinforcing plate 23 is provided with an installation through hole 21; the first reinforcing ribs 25 are provided along the outer periphery of the reinforcing plate 23; on reinforcing plate 23 was located to a plurality of second strengthening ribs 26, and from the periphery of installation through-hole 21 along the radial extension of installation through-hole 21 and be connected with first strengthening rib 25, a plurality of second strengthening ribs 26 are interval distribution along the circumferential direction of installation through-hole 21, wherein, the setting of reinforcing plate 23 has increased the area of contact of outer staving main part 210 with bearing frame 1, can directly restrain the circumference drunkenness between bearing frame 1 and the outer staving main part 210, thereby the bulk strength of bearing frame subassembly 100 has been improved, simultaneously, reinforcing plate 23 still can provide the support for second strengthening rib 26, the torsion that second strengthening rib 26 bore can directly transmit to reinforcing plate 23 on, thereby avoid second strengthening rib 26 to take place to warp.
Further, in order to improve the adsorption force of the bearing seat assembly 100, at least one adsorption through hole 231 is disposed on the reinforcing plate 23 between two adjacent second reinforcing ribs 26, and since the bearing seat assembly 100 and the outer tub body 210 are integrally formed by injection molding, plastics are filled in the adsorption through hole 231, so that the adsorption through hole 231 can communicate the plastics on both sides of the reinforcing plate 23, thereby improving the connection stability of the bearing seat assembly 100 and the outer tub body 210, preventing the bearing seat assembly 100 from falling off from the outer tub body 210, improving the service life and vibration resistance of the washing machine, and preventing a gap from being generated between the outer tub body and the bearing seat assembly 100 due to long-time vibration, referring to fig. 2, in an embodiment of the present invention, two adsorption through holes 231 are disposed on the reinforcing plate 23 between two adjacent second reinforcing ribs 26.
It should be noted that, referring to fig. 2 and 3, the suction through hole 231 formed in the reinforcing plate 23 between two adjacent second reinforcing ribs 26 may also be a small suction hole, so that the suction force between the outer tub body 210 and the bearing seat assembly 100 can be further improved.
In order to further improve the torsional strength of the bearing seat 1, the periphery of the reinforcement 2 is provided with a third reinforcing rib 27, the third reinforcing rib 27 is arranged at the periphery of the first reinforcing rib 25, the third reinforcing rib and the first reinforcing rib 25 are arranged at intervals along the radial direction of the installation through hole 21, the second reinforcing ribs 26 respectively extend to the third reinforcing rib 27 along the radial direction of the installation through hole 21, the third reinforcing rib 27 extends through the second reinforcing rib 26 and is connected to the bearing seat 1, so that the circumferential strength of the bearing seat 1 is enhanced, the bearing seat 1 is integrally kept stable, the bearing seat 1 is firmly combined with the outer barrel body 210, and the phenomenon of separation from the outer barrel body 210 cannot occur during the work of the washing machine.
Because the torque borne by one side, far away from the bearing seat 1, of each second reinforcing rib 26 is the largest, in order to further improve the torsion resistance of the second reinforcing rib 26, torsion resistant ribs 261 are respectively arranged on two sides, in the circumferential direction, of each second reinforcing rib 26 in the installation through hole 21, the two torsion resistant ribs 261 are oppositely arranged, two ends of each torsion resistant rib 261 are respectively connected with the first reinforcing rib 25 and the third reinforcing rib 27, and meanwhile, the torsion resistance of the bearing seat 1 is further improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A bearing housing assembly installed at a depressed area of an inner end wall of an outer tub of a washing machine, comprising:
the center of the reinforcing piece is provided with an installation through hole, the reinforcing piece is obliquely arranged with the center line of the installation through hole from the periphery to the middle part, so that the middle part of the reinforcing piece is convexly arranged towards one side, and the reinforcing piece is accommodated in the sunken area; and the number of the first and second groups,
and the bearing block is sleeved on the mounting through hole so as to be connected with the reinforcing piece in a sleeved mode.
2. The bearing carrier assembly of claim 1, wherein said bearing carrier comprises:
the mounting column is used for being matched with the bearing and sleeved in the mounting through hole; and the number of the first and second groups,
the connecting columns are arranged on the outer side walls of the mounting columns and extend along the extending direction of the mounting columns, and the connecting columns are used for being connected with a stator of the motor.
3. The bearing pedestal assembly of claim 2, wherein a plurality of connecting through holes are formed in the periphery of the mounting through hole and are communicated with the mounting through hole, the connecting through holes are distributed at intervals along the circumferential direction of the mounting through hole, the connecting through holes and the connecting columns are arranged in a one-to-one correspondence manner, and each connecting column penetrates through the corresponding connecting through hole so that the bearing pedestal is mounted on the reinforcement.
4. The bearing seat assembly as claimed in claim 3, wherein a plurality of limiting blocks are protruded from the outer side of the mounting post, and each limiting block is respectively disposed between two adjacent connecting posts;
and spacing blocks are arranged between two adjacent connecting through holes, and the spacing blocks correspond to the limiting blocks one to one and are connected with each other through connecting structures, so that the bearing seat is detachably mounted on the reinforcing piece.
5. The bearing housing assembly of claim 1, wherein the reinforcement comprises:
the reinforcing plate is arranged along the outer contour circumference of the bearing seat, and the center of the reinforcing plate is provided with the mounting through hole;
the first reinforcing ribs are arranged along the periphery of the reinforcing plate; and the number of the first and second groups,
a plurality of second strengthening ribs, a plurality of second strengthening ribs are located on the reinforcing plate, and certainly installation through-hole's periphery is followed installation through-hole's radial extension and with first strengthening rib is connected, a plurality of second strengthening ribs are followed installation through-hole's circumferential direction is interval distribution.
6. The bearing housing according to claim 5, wherein at least one suction through-hole is provided in the reinforcing plate between two adjacent second reinforcing beads.
7. The bearing housing according to claim 5, wherein a third reinforcing rib is provided on the outer periphery of the reinforcing member, the third reinforcing rib being provided on the outer periphery of the first reinforcing rib and spaced from the first reinforcing rib in the radial direction of the mounting through-hole;
the plurality of second reinforcing ribs extend to the third reinforcing ribs along the radial direction of the mounting through holes respectively.
8. The bearing housing as claimed in claim 7, wherein each of the second reinforcing ribs is provided with anti-torsion ribs on both sides in the circumferential direction of the mounting through-hole, the two anti-torsion ribs being disposed opposite to each other, and both ends of each of the anti-torsion ribs are connected to the first reinforcing rib and the third reinforcing rib, respectively.
9. An outer barrel assembly, comprising:
a bearing housing assembly according to any one of claims 1 to 8; and the number of the first and second groups,
the middle part of the inner end wall of the outer barrel body main body is arranged in a concave mode and is used for installing the bearing seat assembly.
10. A washing machine comprising the outer tub assembly of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120636783.8U CN215405133U (en) | 2021-03-26 | 2021-03-26 | Bearing seat assembly, outer barrel body assembly and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120636783.8U CN215405133U (en) | 2021-03-26 | 2021-03-26 | Bearing seat assembly, outer barrel body assembly and washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215405133U true CN215405133U (en) | 2022-01-04 |
Family
ID=79669901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120636783.8U Active CN215405133U (en) | 2021-03-26 | 2021-03-26 | Bearing seat assembly, outer barrel body assembly and washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215405133U (en) |
-
2021
- 2021-03-26 CN CN202120636783.8U patent/CN215405133U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215405133U (en) | Bearing seat assembly, outer barrel body assembly and washing machine | |
| CN109639038B (en) | High-speed large-capacity three-phase asynchronous motor | |
| CN219063705U (en) | Coupling, air conditioner indoor unit and air conditioner | |
| CN211666900U (en) | Vertical centrifugal pump and gas heater | |
| CN212935583U (en) | Stator core punching sheet, stator core and motor | |
| CN216427716U (en) | Bearing seat and washing machine | |
| CN216589672U (en) | Plastic clutch easy to assemble and high in concentricity | |
| CN107612178B (en) | Motor cabinet and air conditioner | |
| CN219888239U (en) | Shock attenuation booster pump and purifier | |
| CN220234323U (en) | End cover, motor assembly and washing machine | |
| CN210273664U (en) | Automobile booster pump motor with shock absorption function | |
| CN221122400U (en) | Vibration damping pad, compressor mounting structure and air conditioner | |
| CN111355328A (en) | Motor, installation component and damping piece | |
| CN212250620U (en) | Vibration reduction water pump | |
| CN210225116U (en) | End cover of outer rotor motor and outer rotor motor using same | |
| CN217545726U (en) | Motor and washing machine | |
| CN219406162U (en) | Suspension mounting bracket, suspension assembly and vehicle | |
| CN214412497U (en) | Motor and mounting structure who generates heat and coil | |
| CN214742706U (en) | Novel symmetrical double crank of horizontal opposed machine | |
| CN220227644U (en) | Hydraulic mount and vehicle | |
| CN213872924U (en) | Mobile air conditioner comdenstion water suction pump shock-absorbing structure and mobile air conditioner | |
| CN214506699U (en) | Rotor subassembly, motor and domestic appliance | |
| CN216519343U (en) | Suspension bushing | |
| CN212619206U (en) | Volute component and mobile air conditioner | |
| CN217984695U (en) | External rotor motor and lampblack absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |