CN203656131U - Double-stage driving gear box - Google Patents
Double-stage driving gear box Download PDFInfo
- Publication number
- CN203656131U CN203656131U CN201320801679.5U CN201320801679U CN203656131U CN 203656131 U CN203656131 U CN 203656131U CN 201320801679 U CN201320801679 U CN 201320801679U CN 203656131 U CN203656131 U CN 203656131U
- Authority
- CN
- China
- Prior art keywords
- case lid
- casing
- bearing oil
- oil trap
- hole
- 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.)
- Expired - Fee Related
Links
- 238000005266 casting Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 108010085603 SFLLRNPND Proteins 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Landscapes
- General Details Of Gearings (AREA)
Abstract
The utility model discloses a double-stage driving gear box which comprises a box body and a box cover. The box body and the box cover are fixedly connected, and the box division face of the box body and the box cover is a vertical type subdivision face. A box body big bearing oil collecting groove, a box body middle bearing oil collecting groove and a box body small bearing oil collecting groove are formed in the inner wall of the box body. A box cover big bearing oil collecting groove, a box cover middle bearing oil collecting groove and a box cover small bearing oil collecting groove are formed in the inner wall of the box cover. An oil pool is formed in the lower portion of the box body, and an auxiliary oil pool is formed in the position, placed below a big bearing pedestal supporting hole, of the inner wall of the box body. The bottom of the box body big bearing pedestal supporting hole and the bottom of a box cover big bearing hole are respectively provided with a big bearing oil baffle plate. The bottom of a box body middle bearing hole and the bottom of a box cover middle bearing hole are respectively provided with a middle bearing oil baffle plate. The box body small bearing oil collecting groove and the box cover small bearing oil collecting groove are placed in the upper portion of a box body small bearing hole and the upper portion of a box cover small bearing hole respectively. The bottom of the box body small bearing oil collecting groove and the bottom of the box cover small bearing oil collecting groove are respectively provided with a small bearing oil inlet hole. The double-stage driving gear box is good in lubricating and cooling effect.
Description
Technical field
The utility model relates to a kind of track traffic gear drive, especially relates to a kind of two-stage uni-drive gear box.
Background technique
Gear-box is one of urban track traffic field key components and parts, along with speed and the load of city rail vehicle constantly increase, cause gear-box temperature rise aggravation, whether reasonable, the reliable normal use that directly affects gear-box of lubricating structure, existing Subway Gear Box is generally one-level slant gear transmission, can not meet the requirement of metro vehicle bogie space mounting completely, and oil-collecting space is little, trapped fuel amount is few, and bearing lubrication is insufficient, cause gear-box temperature rise aggravation, affect traffic safety.
Summary of the invention
It is lubricated effectively reliably that the purpose of this utility model is to provide one to carry out box bearing, improves the two-stage uni-drive gear box of the radiating effect of gear-box.
In order to achieve the above object, the technical solution of the utility model is: a kind of two-stage uni-drive gear box, comprise casing and case lid, casing is fixedly connected with case lid, the flask joint of casing and case lid is vertical split surface, the inwall of described casing is provided with the large bearing oil trap of casing, casing intermediate bearing oil trap and the little bearing oil trap of casing, and the inwall of case lid is provided with the large bearing oil trap of case lid, case lid intermediate bearing oil trap and the little bearing oil trap of case lid; The bottom of described casing is provided with oil sump, and the large bearing support supported hole below place that is positioned at of cabinet wall is provided with auxiliary oil sump; The large bearing oil trap of described casing and the large bearing oil trap of case lid lay respectively at by the side of the large bearing support supported hole of casing and the large bearing hole of case lid, the bottom of the large bearing oil trap of described casing and the large bearing oil trap of case lid is respectively equipped with large bearing oil inlet hole, and the bottom of the large bearing support supported hole of described casing and the large bearing hole of case lid is respectively equipped with large bearing oil baffle; Described casing intermediate bearing oil trap and case lid intermediate bearing oil trap are arranged at respectively casing and cover wall, and lay respectively at the top in casing intermediate bearing hole and case lid intermediate bearing hole, the bottom of casing intermediate bearing oil trap and case lid intermediate bearing oil trap is respectively equipped with intermediate bearing oil inlet hole, and the bottom in described casing intermediate bearing hole and case lid intermediate bearing hole is respectively equipped with intermediate bearing oil baffle; The little bearing oil trap of described casing and the little bearing oil trap of case lid are arranged at respectively casing and cover wall, and lay respectively at the top of the little bearing hole of casing and the little bearing hole of case lid, the bottom of the little bearing oil trap of casing and the little bearing oil trap of case lid is respectively equipped with little bearing oil inlet hole.
Described casing is provided with viewing window, oil ga(u)ge, oiling magnetic screw plug and the magnetic screw plug of draining the oil.
The large bearing oil trap of described casing, casing intermediate bearing oil trap and the little bearing oil trap of casing form by cabinet wall and casing oil groove baffle plate; The large bearing oil trap of described case lid, case lid intermediate bearing oil trap and the little bearing oil trap of case lid are made up of cover wall and case lid oil groove baffle plate.
The large bearing oil trap of described casing, casing intermediate bearing oil trap and the little bearing oil trap of casing all with the moulding of casing integrally casting, the large bearing oil trap of described case lid, case lid intermediate bearing oil trap and the little bearing oil trap of case lid all with the moulding of case lid integrally casting.
Described oil ga(u)ge and the magnetic screw plug of draining the oil are arranged at the oil sump place of casing.
Described auxiliary oil sump is fixed on baffle plate by bolt on the inwall of casing and forms, and auxiliary oil sump is circular arc.
On described casing and case lid, be provided with and strengthen and heat radiation gusset.
The cross section of the large bearing oil trap of described casing is arc, and the cross section of the large bearing oil trap of case lid is funnel shaped, and the cross section of casing intermediate bearing oil trap is trapezoidal shape, and the cross section of case lid intermediate bearing oil trap is funnel shaped.
On described large bearing oil baffle, there is oil drainage hole, the large bearing hole of case lid bottom on casing large bearing support supported hole bottom and case lid on described casing has respectively the first spill port, and the first spill port communicates with oil sump or auxiliary oil sump by corresponding oil drainage hole respectively.
The little bearing hole of case lid bottom on casing little bearing hole bottom and case lid on described casing has respectively the second spill port, and the second spill port communicates with oil sump.
Adopt after said structure, compare existing gear box body structure, the utility model can carry out box bearing lubricated effectively reliably, and perfect heat-dissipating, reduces gear-box temperature, guarantee gear-box stable, reliably, operation safely; Can meet little spatial requirement, mechanical property is outstanding simultaneously.Can on all kinds of gear-boxes of field of track traffic, apply.
Accompanying drawing explanation
The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.
Fig. 1 is the structural representation of two-stage uni-drive gear box of the present utility model, that is Fig. 2 is along the sectional view of I-I;
Fig. 2 is front view of the present utility model, that is the worm's eye view of Fig. 1;
Fig. 3 is the sectional view of Fig. 1 along II-II, is case lid internal lubrication structure;
Fig. 4 is the sectional view (Rotate 180 °) of Fig. 1 along III-III, is box house lubricating structure;
Fig. 5 is the sectional view of Fig. 3 along IV-IV;
Fig. 6 is the sectional view of Fig. 4 along V-V;
Fig. 7 is the sectional view of Fig. 3 along VI-VI;
Fig. 8 is the sectional view of Fig. 3 along VII-VII;
Fig. 9 is the sectional view of Fig. 4 along VIII-VIII.
Embodiment
As shown in Fig. 1,2,3,4,5,6,7,8,9, a kind of two-stage uni-drive gear box of the present utility model, comprise casing 2 and case lid 1, casing 2 is fixedly connected with case lid 1, the flask joint 23 of casing 2 and case lid 1 is vertical split surface, the inwall of described casing 2 is provided with the large bearing oil trap 11 of casing, casing intermediate bearing oil trap 12 and the little bearing oil trap 13 of casing, and the inwall of case lid 1 is provided with the large bearing oil trap 10 of case lid, case lid intermediate bearing oil trap 9 and the little bearing oil trap 8 of case lid; The bottom of described casing 2 is provided with oil sump 15, and the large bearing support supported hole 16 below places that are positioned at of casing 2 inwalls are provided with auxiliary oil sump 14; The large bearing oil trap 11 of described casing and the large bearing oil trap 10 of case lid lay respectively at by the side of the large bearing support supported hole 16 of casing and the large bearing hole 17 of case lid, the bottom of the large bearing oil trap 11 of described casing and the large bearing oil trap 10 of case lid is respectively equipped with large bearing oil inlet hole 11-3,10-3, and the bottom of the large bearing support supported hole 16 of described casing and the large bearing hole 17 of case lid is respectively equipped with large bearing oil baffle 18; Described casing intermediate bearing oil trap 12 and case lid intermediate bearing oil trap 9 are arranged at respectively casing 2 and case lid 1 inwall, and lay respectively at the top in casing intermediate bearing hole 20 and case lid intermediate bearing hole 19, the bottom of casing intermediate bearing oil trap 12 and case lid intermediate bearing oil trap 9 is respectively equipped with intermediate bearing oil inlet hole 12-3,9-3, and the bottom in described casing intermediate bearing hole 20 and case lid intermediate bearing hole 19 is respectively equipped with intermediate bearing oil baffle 28; The little bearing oil trap 13 of described casing and the little bearing oil trap 8 of case lid are arranged at respectively casing 2 and case lid 1 inwall, and lay respectively at the top of the little bearing hole 22 of casing and the little bearing hole 21 of case lid, the bottom of the little bearing oil trap 13 of casing and the little bearing oil trap 8 of case lid is respectively equipped with little bearing oil inlet hole 13-3,8-3.
As shown in Figure 2, described casing 2 is provided with viewing window 4, oil ga(u)ge 7, oiling magnetic screw plug 5 and the magnetic screw plug 6 of draining the oil.
As shown in Fig. 5,6,7,8,9, the large bearing oil trap 11 of described casing, casing intermediate bearing oil trap 12 and the little bearing oil trap 13 of casing form by cabinet wall 11-1,12-1,13-1 and casing oil groove baffle plate 11-2,12-2,13-2; The large bearing oil trap 10 of described case lid, case lid intermediate bearing oil trap 9 and the little bearing oil trap 8 of case lid are made up of cover wall 10-1,9-1,8-1 and case lid oil groove baffle plate 10-2,9-2,8-2.
As shown in Figure 3,4, the large bearing oil trap 11 of described casing, casing intermediate bearing oil trap 12 and the little bearing oil trap 13 of casing all with casing 2 integrally casting moulding, the large bearing oil trap 10 of described case lid, case lid intermediate bearing oil trap 9 and the little bearing oil trap 8 of case lid all with case lid 1 integrally casting moulding.
As shown in Figure 2,4, described oil ga(u)ge 7 and the magnetic screw plug 6 of draining the oil are arranged at oil sump 15 places of casing 2.
As shown in Figure 4, described auxiliary oil sump 14 is fixed on baffle plate 24 by bolt on the inwall of casing 2 and forms, and auxiliary oil sump 14 is circular arc.
As shown in Figure 1,2,3, 4, on described casing 2 and case lid 1, be provided with and strengthen and heat radiation gusset 27.Like this, can effectively improve casing rigidity, the temperature of equilibrium while simultaneously reducing casing operation.
As shown in Fig. 5,6,7, the cross section of the large bearing oil trap 11 of described casing is arc, the cross section of the large bearing oil trap 10 of case lid is funnel shaped, and the cross section of casing intermediate bearing oil trap 12 is trapezoidal shape, and the cross section of case lid intermediate bearing oil trap 9 is funnel shaped.
As shown in Figure 5,6, on described large bearing oil baffle 18, there is oil drainage hole 18-1, the large bearing hole of case lid 17 bottoms on casing large bearing support supported hole 16 bottoms and case lid 1 on described casing 2 have respectively the first spill port 26,25, the first spill ports 26,25 and communicate with oil sump 15 or auxiliary oil sump 14 by corresponding oil drainage hole 18-1 respectively.
As shown in Figure 8,9, the little bearing hole of case lid 21 bottoms on casing little bearing hole 22 bottoms and the case lid 1 on described casing 2 have respectively the second spill port 30,29, the second spill ports 30,29 and communicate with oil sump 15.
As Fig. 1, shown in 2, two-stage uni-drive gear box lubrication principle of the present utility model: gear-box is the space of a relative closure, in the time of vehicle operating, main, driven gear High Rotation Speed, a lubricant oil part for gear surface is got rid of to cabinet wall under the effect of centrifugal force, another part is by leading, driven gear engagement is squeezed to box bilateral wall, the large bearing oil trap 11 of casing, casing intermediate bearing oil trap 12, the little bearing oil trap 13 of casing, the large bearing oil trap 10 of case lid, the little bearing oil trap 8 of case lid intermediate bearing oil trap 9 and case lid is collected and is stirred the lubricant oil that oil splashes respectively, and by large bearing oil inlet hole 11-3, 10-3, intermediate bearing oil inlet hole 12-3, 9-3, little bearing oil inlet hole 13-3, 8-3 enters corresponding bearing, supply oil lubrication to bearing.
Claims (10)
1. a two-stage uni-drive gear box, comprises casing (2) and case lid (1), and casing (2) is fixedly connected with case lid (1), and the flask joint (23) of casing (2) and case lid (1) is vertical split surface, it is characterized in that:
The inwall of a, described casing (2) is provided with the large bearing oil trap of casing (11), casing intermediate bearing oil trap (12) and the little bearing oil trap of casing (13), and the inwall of case lid (1) is provided with the large bearing oil trap of case lid (10), case lid intermediate bearing oil trap (9) and the little bearing oil trap of case lid (8);
The bottom of b, described casing (2) is provided with oil sump (15), and large bearing support supported hole (16) the below place that is positioned at of casing (2) inwall is provided with auxiliary oil sump (14);
C, the large bearing oil trap of described casing (11) and the large bearing oil trap of case lid (10) lay respectively at by the side of the large bearing support supported hole of casing (16) and the large bearing hole of case lid (17), the bottom of the large bearing oil trap of the large bearing oil trap of described casing (11) and case lid (10) is respectively equipped with large bearing oil inlet hole (11-3,10-3), and the bottom of the large bearing support supported hole of described casing (16) and the large bearing hole of case lid (17) is respectively equipped with large bearing oil baffle (18);
D, described casing intermediate bearing oil trap (12) and case lid intermediate bearing oil trap (9) are arranged at respectively casing (2) and case lid (1) inwall, and lay respectively at the top in casing intermediate bearing hole (20) and case lid intermediate bearing hole (19), the bottom of casing intermediate bearing oil trap (12) and case lid intermediate bearing oil trap (9) is respectively equipped with intermediate bearing oil inlet hole (12-3,9-3), and the bottom in described casing intermediate bearing hole (20) and case lid intermediate bearing hole (19) is respectively equipped with intermediate bearing oil baffle (28);
E, the little bearing oil trap of described casing (13) and the little bearing oil trap of case lid (8) are arranged at respectively casing (2) and case lid (1) inwall, and lay respectively at the top of the little bearing hole of casing (22) and the little bearing hole of case lid (21), the bottom of the little bearing oil trap of the little bearing oil trap of casing (13) and case lid (8) is respectively equipped with little bearing oil inlet hole (13-3,8-3).
2. two-stage uni-drive gear box as claimed in claim 1, is characterized in that: described casing (2) is provided with viewing window (4), oil ga(u)ge (7), oiling magnetic screw plug (5) and the magnetic screw plug (6) of draining the oil.
3. two-stage uni-drive gear box as claimed in claim 1, is characterized in that: the large bearing oil trap of described casing (11), casing intermediate bearing oil trap (12) and the little bearing oil trap of casing (13) form by cabinet wall (11-1,12-1,13-1) and casing oil groove baffle plate (11-2,12-2,13-2); The large bearing oil trap of described case lid (10), case lid intermediate bearing oil trap (9) and the little bearing oil trap of case lid (8) are made up of cover wall (10-1,9-1,8-1) and case lid oil groove baffle plate (10-2,9-2,8-2).
4. two-stage uni-drive gear box as claimed in claim 1, it is characterized in that: the large bearing oil trap of described casing (11), casing intermediate bearing oil trap (12) and the little bearing oil trap of casing (13) all with casing (2) integrally casting moulding, the large bearing oil trap of described case lid (10), case lid intermediate bearing oil trap (9) and the little bearing oil trap of case lid (8) all with case lid (1) integrally casting moulding.
5. two-stage uni-drive gear box as claimed in claim 2, is characterized in that: described oil ga(u)ge (7) and the magnetic screw plug (6) of draining the oil are arranged at the oil sump (15) of casing (2) and locate.
6. two-stage uni-drive gear box as claimed in claim 1, is characterized in that: described auxiliary oil sump (14) is fixed on baffle plate (24) by bolt on the inwall of casing (2) and forms, and auxiliary oil sump (14) is circular arc.
7. two-stage uni-drive gear box as claimed in claim 1, is characterized in that: on described casing (2) and case lid (1), be provided with and strengthen and heat radiation gusset (27).
8. two-stage uni-drive gear box as claimed in claim 1, it is characterized in that: the cross section of the large bearing oil trap of described casing (11) is arc, the cross section of the large bearing oil trap of case lid (10) is funnel shaped, the cross section of casing intermediate bearing oil trap (12) is trapezoidal, and the cross section of case lid intermediate bearing oil trap (9) is funnel shaped.
9. two-stage uni-drive gear box as claimed in claim 1, it is characterized in that: on described large bearing oil baffle (18), there is oil drainage hole (18-1), the large bearing hole of case lid (17) bottom on the large bearing support supported hole of casing (16) bottom and case lid (1) on described casing (2) has respectively the first spill port (26,25), and the first spill port (26,25) communicates with oil sump (15) or auxiliary oil sump (14) by corresponding oil drainage hole (18-1) respectively.
10. two-stage uni-drive gear box as claimed in claim 1, it is characterized in that: the little bearing hole of case lid (21) bottom on the little bearing hole of casing (22) bottom and case lid (1) on described casing (2) has respectively the second spill port (30,29), and the second spill port (30,29) communicates with oil sump (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320801679.5U CN203656131U (en) | 2013-12-09 | 2013-12-09 | Double-stage driving gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320801679.5U CN203656131U (en) | 2013-12-09 | 2013-12-09 | Double-stage driving gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656131U true CN203656131U (en) | 2014-06-18 |
Family
ID=50922519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320801679.5U Expired - Fee Related CN203656131U (en) | 2013-12-09 | 2013-12-09 | Double-stage driving gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203656131U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822067A (en) * | 2018-08-14 | 2020-02-21 | 长城汽车股份有限公司 | Auxiliary lubricating structure of transmission device and speed reducer |
| CN110836260A (en) * | 2018-08-15 | 2020-02-25 | 广州小鹏汽车科技有限公司 | Reduction gear assembly and car |
| CN112984089A (en) * | 2021-02-07 | 2021-06-18 | 于洋 | Rail transit gear box |
| CN113217378A (en) * | 2021-05-18 | 2021-08-06 | 杰锋汽车动力***股份有限公司 | Hydrogen circulating pump gear chamber cover plate structure |
-
2013
- 2013-12-09 CN CN201320801679.5U patent/CN203656131U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822067A (en) * | 2018-08-14 | 2020-02-21 | 长城汽车股份有限公司 | Auxiliary lubricating structure of transmission device and speed reducer |
| CN110836260A (en) * | 2018-08-15 | 2020-02-25 | 广州小鹏汽车科技有限公司 | Reduction gear assembly and car |
| CN112984089A (en) * | 2021-02-07 | 2021-06-18 | 于洋 | Rail transit gear box |
| CN113217378A (en) * | 2021-05-18 | 2021-08-06 | 杰锋汽车动力***股份有限公司 | Hydrogen circulating pump gear chamber cover plate structure |
| CN113217378B (en) * | 2021-05-18 | 2023-03-07 | 杰锋汽车动力***股份有限公司 | Hydrogen circulating pump gear chamber cover plate structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203656131U (en) | Double-stage driving gear box | |
| CN104048022B (en) | Subway Gear Box casing | |
| CN102494115A (en) | Bearing lubricating structure of driving gear shaft of gear box for urban rail traffic vehicle | |
| CN201679944U (en) | Bearing lubricant circuit of input axis of rectangular axis gearbox | |
| CN203189682U (en) | Subway gear box body | |
| CN201739432U (en) | Single gear reducer | |
| CN103363081B (en) | Gear-box and engineering machinery | |
| CN204055282U (en) | A kind of removable somatotype drawing and pulling type battery cell bracket | |
| CN203272732U (en) | Gear case of rail transit vehicle | |
| CN109058431B (en) | Compact self-lubricating axle gear box body, gear box and walking transmission system | |
| CN103727210A (en) | First-stage spiral bevel gear transmission device | |
| CN205823369U (en) | A kind of vertical shaft general gasoline engine and crankcase case lid crankshaft bearing lubrication system thereof | |
| CN203946166U (en) | A kind of front axle main pin blanking cover mounting structure | |
| CN202756048U (en) | Necking split-type oil pan | |
| CN203500438U (en) | High speed motor car gear box body | |
| CN109667917A (en) | A kind of gearbox | |
| JP5636753B2 (en) | Hybrid vehicle | |
| CN206327145U (en) | Automobile and its dynamical system and its motor gear box motor power unit | |
| CN201843690U (en) | Oil return device of automobile engine | |
| CN202629016U (en) | Novel gear cover | |
| CN201071928Y (en) | Bearing self-lubricating device for gear box | |
| CN205047798U (en) | Gear box is from lubrication sealing structure | |
| CN203655911U (en) | Bearing seat of automobile drive axle | |
| CN202325809U (en) | Configuration construction for water filling ports of cooling water of motorcycle | |
| CN203420760U (en) | Engine oil sump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Patentee before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 |