CN210680290U - Novel driving axle housing and lightweight electric driving axle assembly - Google Patents
Novel driving axle housing and lightweight electric driving axle assembly Download PDFInfo
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- CN210680290U CN210680290U CN201921181176.6U CN201921181176U CN210680290U CN 210680290 U CN210680290 U CN 210680290U CN 201921181176 U CN201921181176 U CN 201921181176U CN 210680290 U CN210680290 U CN 210680290U
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- end cover
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- housing
- main shell
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- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 9
- 239000011229 interlayer Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 12
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of electric automobiles, in particular to a novel driving axle housing and a lightweight electric driving axle assembly; the device comprises a main shell, a rear end cover arranged on the main shell and two bridge pipes; the rigidity of the main shell is greater than that of the rear end cover; the main shell is provided with a gearbox mounting port, a rear cover mounting port and two bridge pipe connecting ports which are communicated with the inner cavity of the main shell; the gearbox mounting port is correspondingly connected with the output end connecting port of the gearbox; the rear end cover is correspondingly covered and connected with the rear cover mounting opening; the end parts of the two bridge pipes are respectively connected with the connecting ports of the two bridge pipes in a one-to-one corresponding mode; the main stressed part of the axle housing adopts a main housing, the strength of the main housing is high, the stability of the driving axle housing is ensured, and the automatic gearbox is firmly arranged on the driving axle housing; and the rear end cover which is easy to shape is adopted at the position of the non-stressed rear end cover, so that the whole mass of the driving axle housing is reduced, and the rear end cover is convenient to perforate or carry out other structures.
Description
Technical Field
The utility model belongs to the technical field of the electric automobile technique and specifically relates to a novel transaxle housing and lightweight electric drive axle assembly are related to.
Background
An axle housing, which is a basic member for mounting a final drive, a differential, half shafts, hubs, and suspensions, such as the electric drive axle disclosed in 201820170867.5; the axle housing mainly functions to support and protect a main speed reducer, a differential mechanism, a half shaft and the like. Meanwhile, the axle housing is one of the main components of the running gear; the axle housing is a supporting part and an accommodating part of a main speed reducer, a differential mechanism, a half shaft and the like; (2) lubricating oil is filled in the shell, and can lubricate gears, bearings and the like; (3) the sealed shell can prevent dirt from entering and damaging the working environment of the components in the shell; (4) the axle housing also serves to fix the axial relative positions of the left and right drive wheels. Current axle housing divide into integral type and split type: the integrated axle housing is a hollow beam formed by stamping a steel plate, and the axle housing and the speed reducer shell are two bodies; the integrated axle housing has the advantages of high rigidity and strength, reliability in working, large mass and difficulty in processing, and is suitable for commercial vehicles with large loading mass; split type axle housing comprises left and right main shell and semi-axis sleeve pipe, and split type axle housing simple structure, manufacturing process are good, but dismouting, adjustment, maintenance are very inconvenient, and the rigidity and the intensity of axle housing receive the restriction of structure, especially the rigidity intensity direct influence split type axle housing's of left and right main shell intensity, and this thickness that just requires the main shell is enough big, and thickness is big to be unfavorable for whole car again and subtracts weight.
Therefore, to the problem the utility model discloses the urgent need provides a new novel transaxle shell and lightweight electric drive axle assembly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new novel transaxle housing and lightweight electric transaxle assembly, the main casing body and the rear end cap through the components of a whole that can function independently and different rigidity are big in order to solve the integral type axle housing processing degree of difficulty that exists among the prior art, the host and guest thickness of split type axle housing is unfavorable for whole car greatly and is subtract the technical problem of heavy.
The utility model provides a novel driving axle housing, which comprises a main housing, a rear end cover arranged on the main housing and two axle tubes; the rigidity of the main shell is greater than that of the rear end cover; the main shell is provided with a gearbox mounting port, a rear cover mounting port and two bridge pipe connecting ports which are communicated with the inner cavity of the main shell; the gearbox mounting port is correspondingly connected with the output end connecting port of the gearbox; the rear end cover is correspondingly covered and connected with the rear cover mounting opening; the two bridge pipe ends are respectively connected with the two bridge pipe connectors in a one-to-one correspondence manner.
Furthermore, a bridge pipe support is arranged on the outer wall of at least one bridge pipe, a motor connecting plate is arranged on the bridge pipe support, and the plane where the motor connecting plate is located is parallel to the plane where the gearbox mounting opening is located.
Further, the bridge pipe is in interference fit with the bridge pipe connecting port.
Further, be equipped with the oil drain on the main casing diapire, install the oil drain plug on this oil drain.
Furthermore, a plurality of gearbox connecting screw holes are circumferentially distributed on the main shell along the edge of the gearbox mounting opening.
Furthermore, a vent plug is arranged on the rear end cover.
Further, the main shell is made of cast iron; the rear end cover is made of aluminum alloy.
The utility model also provides a lightweight electric drive axle assembly, which comprises a high-speed permanent magnet synchronous motor, an automatic gearbox and the novel drive axle housing as claimed; a differential mechanism is arranged in a main shell of the novel driving axle housing, and two output shafts of the differential mechanism are respectively and correspondingly connected with two driving wheels through wheel transmission shafts; the two wheel transmission shafts are respectively and correspondingly arranged in the two bridge pipes; the high-speed permanent magnet synchronous motor is correspondingly and fixedly connected with the bridge pipe bracket through a motor bracket, and the power output end of the high-speed permanent magnet synchronous motor is correspondingly and fixedly connected with the power input end of the automatic gearbox; a power output shaft is arranged in the high-speed permanent magnet synchronous motor, the power output shaft is in driving connection with a power input shaft arranged in an automatic gearbox, and a speed change output shaft of the automatic gearbox is in corresponding driving connection with an input shaft of a differential mechanism.
Further, the motor bracket comprises a motor connecting part and a bridge pipe bracket connecting part which is connected with the side edge of the motor connecting part in a bending way; the motor connecting part is correspondingly connected with the end part of the high-speed permanent magnet synchronous motor; the bridge pipe support connecting part is correspondingly connected with a motor connecting plate of the bridge pipe support.
Further, the device also comprises a temperature controller; the lower part of the outer wall of the main shell is connected with a temperature adjusting plate, a temperature adjusting interlayer is arranged between the temperature adjusting plate and the bottom wall of the main shell, an air outlet hole and an air inlet are arranged on the bottom wall of the temperature adjusting interlayer, and the air inlet is communicated with an air outlet end of the refrigeration compressor through an air inlet pipe; a temperature sensor is arranged in the main shell, and the temperature sensor and the refrigeration compressor are respectively electrically connected with a temperature controller.
Compared with the prior art, the utility model has the following progress:
1. the utility model provides a novel driving axle housing which comprises a main housing body, a rear end cover arranged on the main housing body and two axle tubes; the rigidity of the main shell is greater than that of the rear end cover; the main shell is provided with a gearbox mounting port, a rear cover mounting port and two bridge pipe connecting ports which are communicated with the inner cavity of the main shell; the gearbox mounting port is correspondingly connected with the output end connecting port of the gearbox; the rear end cover is correspondingly covered and connected with the rear cover mounting opening; the end parts of the two bridge pipes are respectively connected with the connecting ports of the two bridge pipes in a one-to-one corresponding mode; the main stressed part of the axle housing adopts a main housing, the strength of the main housing is high, the stability of the driving axle housing is ensured, and the automatic gearbox is firmly arranged on the driving axle housing; and the rear end cover which is easy to shape is adopted at the position of the non-stressed rear end cover, so that the whole mass of the driving axle housing is reduced, and the rear end cover is convenient to perforate or carry out other structures.
2. The utility model provides a novel driving axle housing, which adopts the design that at least one bridge pipe outer wall is provided with a bridge pipe bracket, the bridge pipe bracket is provided with a motor connecting plate, and the plane of the motor connecting plate is parallel to the plane of the gearbox mounting port; the plane of the motor connecting plate is parallel to the plane of the gearbox mounting opening, so that the driving motor and the gearbox are not twisted in the direction along the length direction of the bridge pipe, and the stability of mounting of the driving motor and the gearbox is maintained.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view (perspective view) of the lightweight electric drive axle assembly according to the present invention;
fig. 2 is a schematic view (rear view) of the lightweight electric drive axle assembly according to the present invention;
fig. 3 is a schematic view of the internal structure of the lightweight electric drive axle assembly according to the present invention (a schematic view of the connection structure of the automatic transmission and the wheel transmission shaft with the differential);
fig. 4 is a schematic structural view (assembly view) of the novel transaxle case of the present invention;
fig. 5 is a schematic structural view (cross-sectional view) of the main housing according to the present invention;
fig. 6 is a schematic structural view of the rear end cap according to the present invention;
fig. 7 is an assembly view (perspective view) of the motor bracket and the bridge pipe according to the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, 2, and 3, the light-weight electric drive axle assembly provided in this embodiment includes a high-speed permanent magnet synchronous motor 4, an automatic transmission 5, and a novel drive axle housing as described below; a differential 8 is arranged in a main shell 1 of the novel driving axle housing, and two output shafts 81 of the differential are respectively and correspondingly connected with two driving wheels through wheel transmission shafts 82; the two wheel transmission shafts 82 are respectively and correspondingly arranged in the two bridge pipes 3; the high-speed permanent magnet synchronous motor 4 is correspondingly fixedly connected with the bridge pipe bracket 31 through the motor bracket 7, and the power output end of the high-speed permanent magnet synchronous motor 4 is correspondingly fixedly connected with the power input end of the automatic gearbox 5; the high-speed permanent magnet synchronous motor 4 is internally provided with a power output shaft which is in driving connection with a power input shaft arranged in the automatic gearbox 5, and the speed change output shaft 51 of the automatic gearbox 5 is in corresponding driving connection with the input shaft 84 of the differential 8.
Referring to fig. 1, 2, 4, 5 and 6, the present embodiment provides a novel transaxle case including a main housing 1, a rear end cover 2 mounted on the main housing 1, and two axle tubes 3; the rigidity of the main shell 1 is greater than that of the rear end cover 2; the main shell 1 is provided with a gear box mounting port 11, a rear cover mounting port 12 and two bridge pipe connecting ports 13 which are communicated with the inner cavity of the main shell 1; the gearbox mounting port 11 is correspondingly connected with an output end connecting port of the gearbox; the rear end cover 2 is correspondingly covered and connected with the rear cover mounting opening 12; the end parts of the two bridge pipes 3 are respectively connected with the two bridge pipe connectors 13 in a one-to-one correspondence manner. In this embodiment, the bridge pipe 3 is in interference fit with the bridge pipe connector 13, and the outer diameter of the bridge pipe 3 is slightly larger than the inner diameter of the bridge pipe connector 13, so that the bridge pipe 3 is stably connected with the bridge pipe connector 13, and oil leakage is prevented. Rear cover fixing bolt holes 121 are arranged on the main shell body along the edge of the rear cover mounting hole 12, fixing penetrating holes 122 are arranged in the circumferential direction of the edge of the rear end cover 2, and the rear cover fixing bolt holes 121 correspond to the fixing penetrating holes 122 one by one and are connected through bolts. The utility model provides a novel driving axle housing which comprises a main housing 1, a rear end cover 2 arranged on the main housing 1 and two axle tubes 3; the main shell 1 is provided with a gear box mounting port 11, a rear cover mounting port 12 and two bridge pipe connecting ports 13 which are communicated with the inner cavity of the main shell 1; the gearbox mounting port 111 is correspondingly connected with a gearbox; the rear end cover 2 is correspondingly covered and connected with the rear cover mounting opening 12; the end parts of the two bridge pipes 3 are respectively connected with the two bridge pipe connectors 13 in a one-to-one corresponding mode; the main shell 1 is adopted at the main stress position of the axle housing, the strength of the main shell 1 is high, the stability of the driving axle housing is ensured, and the automatic gearbox is firmly arranged on the driving axle housing; and the rear end cover 2 which is light in weight and easy to shape is adopted at the position of the non-stressed rear end cover, so that the whole mass of the drive axle housing is reduced, and the rear end cover 2 is convenient to perforate or carry out other structures.
In the embodiment, the main shell 1 is made of cast iron; the rear end cover 2 is made of aluminum alloy.
Referring to fig. 1, 2, 4 and 7, in this embodiment, a bridge pipe support 31 is disposed on an outer wall of one bridge pipe 3, a motor connecting plate 311 is disposed on the bridge pipe support 31, and a plane where the motor connecting plate 311 is located is parallel to a plane where the transmission mounting opening 11 is located. The novel driving axle housing provided by the utility model adopts the design that the outer wall of at least one axle tube 3 is provided with an axle tube bracket 31, the axle tube bracket 31 is provided with a motor connecting plate 311, and the plane where the motor connecting plate 311 is positioned is parallel to the plane where the gearbox mounting port 11 is positioned; the plane of the motor connecting plate 311 is parallel to the plane of the gearbox mounting opening 11, so that the driving motor and the gearbox are not twisted in the direction along the length direction of the bridge pipe, and the stability of mounting of the driving motor and the gearbox is maintained.
Referring to fig. 5, in the present embodiment, an oil outlet is formed in the bottom wall of the main housing 1, and an oil drain plug 101 is mounted on the oil outlet. This oil discharge opening directly sets up in main casing 1 bottom and helps thoroughly discharging the interior lubricating oil of transaxle axle housing.
Referring to fig. 4 and 5, in the present embodiment, a plurality of transmission connection screw holes 111 are circumferentially arranged on the main housing 1 along the transmission mounting port 11.
Referring to fig. 2, 4 and 6, the rear end cap 2 of the present embodiment is provided with a vent plug 202. The rear end cover 2 is provided with an oil filling port 203, and an oil filling port sealing plug 201 is arranged on the oil filling port 203. The vent plug 202 and the oil filler are provided in the rear end cap 2, which is convenient to manufacture and reduces the number of holes drilled in the main casing 1, helping to maintain the strength of the main casing 1.
Referring to fig. 1, 2 and 7, in the present embodiment, two bridge pipe connection ports 13 are symmetrically disposed on two sides of the main housing 1; the two bridge pipes 3 are provided with frame connecting seats 32; the two frame connecting seats 32 are symmetrically arranged.
Referring to fig. 1, 4 and 7, the motor bracket 7 of the present embodiment includes a motor connecting portion 71 and a bridge bracket connecting portion 72 connected to a side edge of the motor connecting portion 71 in a bent manner; the motor connecting part 71 is provided with an arc-shaped opening, motor connecting bolt holes 711 are distributed along the edge of the arc-shaped opening, the motor bolt holes correspond to the threaded blind holes at the end part of the motor one by one, and the motor connecting part 71 is correspondingly connected with the end part of the high-speed permanent magnet synchronous motor 4 through bolts; the bridge pipe bracket connecting part 72 is correspondingly connected with the motor connecting plate 311 of the bridge pipe bracket 31 through bolts and nuts.
Referring to fig. 2 and 5, in the present embodiment, the temperature adjustment plate 15 is connected to the lower outer wall of the main casing 1, a temperature adjustment interlayer 14 is disposed between the temperature adjustment plate and the bottom wall of the main casing 1, an air outlet 141 and an air inlet 142 are disposed on the bottom wall of the temperature adjustment interlayer 14, the air inlet 142 is communicated with an air outlet end of the refrigeration compressor 6 through an air inlet pipe, a temperature sensor is disposed in the main casing 1, and the temperature sensor and the refrigeration compressor 6 are electrically connected to a temperature controller respectively; when the temperature in the main casing body 1 is too high (50 ℃), the refrigeration compressor starts to work, absorbs external air, compresses and cools the air, then injects the air into the temperature-adjusting interlayer 14 through the air inlet 142, and discharges the air from the air outlet 141 to cool the inside of the main casing body 1, so that the temperature in the main casing body 1 is prevented from being too high, and the service life of lubricating oil is prevented from being influenced. In the present embodiment, the refrigeration compressor 6 is fixed to the bridge pipe 3 through a bracket or the like, and certainly, the refrigeration compressor may be fixed to the main housing 1 or the frame, and there are various means for fixing the compressor to the bridge pipe or the frame.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A novel driving axle housing is characterized by comprising a main housing (1), a rear end cover (2) and two axle tubes (3), wherein the rear end cover (2) is arranged on the main housing (1); the rigidity of the main shell (1) is greater than that of the rear end cover (2); the main shell (1) is provided with a gearbox mounting port (11), a rear cover mounting port (12) and two bridge pipe connecting ports (13) which are communicated with the inner cavity of the main shell (1); the gearbox mounting port (11) is correspondingly connected with an output end connecting port of the gearbox; the rear end cover (2) is correspondingly covered and connected with the rear cover mounting opening (12); the end parts of the two bridge pipes (3) are respectively connected with the two bridge pipe connectors (13) in a one-to-one correspondence way.
2. A novel transaxle case of claim 1 wherein at least one of the axle tubes (3) has an axle tube support (31) on the outer wall thereof, and a motor connecting plate (311) is provided on the axle tube support (31), and the plane of the motor connecting plate (311) is parallel to the plane of the transmission mounting opening (11).
3. A novel transaxle case according to claim 1 wherein the axle tube (3) is interference fitted to the axle tube connecting port (13).
4. A novel drive axle housing according to claim 3, characterized in that an oil drain hole is formed in the bottom wall of the main housing (1), and an oil drain plug (101) is mounted on the oil drain hole.
5. A novel transaxle case of claim 4 wherein the main housing (1) has a plurality of transmission connecting screw holes (111) circumferentially formed along the transmission mounting opening (11).
6. A novel transaxle case of claim 5 wherein the rear end cover (2) has a breather plug (202) thereon.
7. A novel transaxle case of claim 6 wherein the main housing (1) is made of cast iron; the rear end cover (2) is made of aluminum alloy.
8. A light-weight electric drive axle assembly, which is characterized by comprising a high-speed permanent magnet synchronous motor (4), an automatic gearbox (5), a novel drive axle housing as claimed in any one of claims 2 to 7; a differential mechanism (8) is arranged in a main shell (1) of the novel driving axle housing, and two output shafts of the differential mechanism are respectively and correspondingly connected with two driving wheels through wheel transmission shafts; the two wheel transmission shafts are respectively and correspondingly arranged in the two bridge pipes (3); the high-speed permanent magnet synchronous motor (4) is correspondingly and fixedly connected with the bridge pipe bracket (31) through a motor bracket (7), and the power output end of the high-speed permanent magnet synchronous motor (4) is correspondingly and fixedly connected with the power input end of the automatic gearbox (5); a power output shaft is arranged in the high-speed permanent magnet synchronous motor (4), the power output shaft is in driving connection with a power input shaft arranged in an automatic gearbox (5), and a speed change output shaft of the automatic gearbox (5) is in corresponding driving connection with an input shaft of a differential (8).
9. The light-weight electric drive axle assembly according to claim 8, wherein the motor bracket (7) comprises a motor connecting portion (71) and a bridge bracket connecting portion (72) connected with a side edge of the motor connecting portion (71) in a bent manner; the motor connecting part (71) is correspondingly connected with the end part of the high-speed permanent magnet synchronous motor (4); the bridge pipe support connecting part (72) is correspondingly connected with a motor connecting plate (311) of the bridge pipe support (31).
10. The light weight electric drive axle assembly of claim 9, further comprising a temperature controller; the lower part of the outer wall of the main shell (1) is connected with a temperature adjusting plate (15), a temperature adjusting interlayer (14) is arranged between the temperature adjusting plate and the bottom wall of the main shell (1), an air outlet hole (141) and an air inlet (142) are arranged on the bottom wall of the temperature adjusting interlayer (14), and the air inlet (142) is communicated with an air outlet end of the refrigeration compressor (6) through an air inlet pipe; a temperature sensor is arranged in the main shell (1), and the temperature sensor and the refrigeration compressor (6) are respectively and electrically connected with a temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921181176.6U CN210680290U (en) | 2019-07-25 | 2019-07-25 | Novel driving axle housing and lightweight electric driving axle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921181176.6U CN210680290U (en) | 2019-07-25 | 2019-07-25 | Novel driving axle housing and lightweight electric driving axle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210680290U true CN210680290U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921181176.6U Expired - Fee Related CN210680290U (en) | 2019-07-25 | 2019-07-25 | Novel driving axle housing and lightweight electric driving axle assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210680290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112849259A (en) * | 2021-03-31 | 2021-05-28 | 杭州世宝汽车方向机有限公司 | Steering gear box and housing thereof |
-
2019
- 2019-07-25 CN CN201921181176.6U patent/CN210680290U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112849259A (en) * | 2021-03-31 | 2021-05-28 | 杭州世宝汽车方向机有限公司 | Steering gear box and housing thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200605 |