CN111237438B - Gear box oiling device capable of adjusting oil level - Google Patents
Gear box oiling device capable of adjusting oil level Download PDFInfo
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- CN111237438B CN111237438B CN201811429570.7A CN201811429570A CN111237438B CN 111237438 B CN111237438 B CN 111237438B CN 201811429570 A CN201811429570 A CN 201811429570A CN 111237438 B CN111237438 B CN 111237438B
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- air outlet
- oil
- inner pipe
- funnel
- gear box
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- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 47
- 239000010687 lubricating oil Substances 0.000 description 21
- 238000005461 lubrication Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000151 anti-reflux effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
An oil level adjustable gearbox oiling device comprises a funnel, an air outlet inner pipe and a supporting plate, wherein an oil filling port is formed in the contact part of the bottom of the funnel and a gearbox, an anti-backflow sealing mechanism is arranged in an inner cavity of the funnel, the supporting plate is fixedly connected with the top end of the funnel through a bolt assembly, a penetrating hole for the air outlet inner pipe to penetrate out is formed in the supporting plate, an anti-backflow inner pipe hole plug is arranged at the air outlet of the air outlet inner pipe, a fixing knob used for ensuring that the height of the air outlet inner pipe is adjustable is arranged between the air outlet inner pipe and the supporting plate, a scale in the vertical direction is arranged on the outer wall surface of the air outlet inner pipe, and the height of an oil liquid surface in the gearbox from the oil filling port can be directly read through the numerical value on the scale so as to convert the height of the oil liquid level; during the oiling process, the internal sealing of the gear box must be ensured without leakage, namely, other parts except the oil filling port ensure certain air tightness. The invention can realize the control of the oil quantity in the gear box, can well solve the problem of unknown oil level after oiling, and has simple structure and convenient operation.
Description
Technical Field
The invention relates to an oiling device applied to a gearbox of a transmission, in particular to an oiling device of a gearbox with adjustable oil level.
Background
The gearbox of the transmission is an important component for protecting the high-speed safe operation of a vehicle, and in order to ensure the reliable operation of the gearbox, a proper amount of lubricating oil is generally required to be added into the gearbox, and the lubricating oil needs to be replaced, maintained and maintained after the gearbox operates for a period of time. The traditional gear box oiling work has inaccurate quantification of the position of the liquid level after oiling, the situation of excessive or insufficient oiling amount easily exists, the excessive oil amount can cause the overhigh pressure in the gear box in operation, and simultaneously, the overflow of lubricating oil is generated, the pollution to a vehicle body and the environment is caused, and the operation cost is increased; too little oil will cause the running temperature of the gear box to be too high, so that the gear box is abraded too fast and damaged.
The lubrication of derailleur is mainly with splash lubrication at present, stirs through gear or oil mixing ring, and lubricating oil is got rid of inside the box and flows to the place that needs lubrication such as bearing along leading the oil groove, and consequently the height of oil level is the important influence factor of the lubricated effect of splash lubrication, consequently to current splash lubrication, has very big influence to the effect that improves splash lubrication to the accurate control of the oil level in the gear box.
In the application field of the speed change gear box, an oil filling device for determining the height of the oil level is not seen at present. In the prior art, the lubricating effect is mainly qualitatively analyzed by monitoring the oil temperature, and the influence of quantitatively determining the position of the oiling liquid level on the optimal lubricating effect is rarely reported. Therefore, it is desirable to provide an adjustable oil filling device with a constant oil level.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the gear box oiling device with the adjustable oil level, which can control the oil quantity in the gear box and well solve the problem of unknown oil level after oiling and has the advantages of simple structure and convenient operation.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an oil level adjustable gearbox oiling device comprises a funnel, an air outlet inner pipe and a supporting plate, wherein an oil filling port is formed in the contact position of the bottom of the funnel and a gearbox, an anti-backflow sealing mechanism is arranged in an inner cavity of the funnel, the supporting plate is fixedly connected with the top end of the funnel through a bolt assembly, a penetrating hole for the air outlet inner pipe to penetrate out is formed in the supporting plate, an anti-backflow inner pipe hole plug is arranged at the air outlet of the air outlet inner pipe, a fixing knob for ensuring that the height of the air outlet inner pipe is adjustable is arranged between the air outlet inner pipe and the supporting plate, a scale in the vertical direction is arranged on the outer wall surface of the air outlet inner pipe, and the height of an oil surface in the gearbox from the oil filling port can be directly read through numerical values on the scale so as to convert the height of the oil level; during the oiling process, the internal sealing of the gear box must be ensured without leakage, namely, other parts except the oil filling port ensure certain air tightness.
As a further improvement of the above technical solution: the sealing mechanism comprises a button, a spring, a sealing ring and a sealing seat, the button is in contact with the spring and is fixedly connected with the sealing seat, the spring is in contact with the supporting plate, and the sealing seat is fixedly connected with the sealing ring; the sealing ring can contact with the plane of the inner cavity of the funnel under the pushing action of the sealing seat, the closing of the oil filling port is realized, and the specific operation is as follows: through pressing the button, the spring is compressed, the seal receptacle is also promoted downwards with the sealing ring, until the plane contact of sealing ring and funnel inner chamber, realize refueling inlet's closing, through extracting tool this moment, twist the funnel, make it not hard up, and gradually take out filling device, this in-process button is pushed down always and is not put, because the oiling mouth is closed always, lubricating oil in the interior trachea of giving vent to anger can't go into in the gear box under atmospheric pressure's effect, consequently, better control the oil liquid level in the gear box unchangeable, can not additionally pour into more lubricating oil into because of taking out filling device in the gear box, thereby possess entry lubricating oil antidrip function.
Furthermore, the button is fixedly connected with the sealing seat through a button fixing screw.
Furthermore, the number of the buttons is one, the number of the springs is two, and the two springs are symmetrically arranged on two sides of the air outlet inner tube.
Further, fixed knob includes the lantern ring and adjusts fixing bolt, the lantern ring cup joints on the outer wall of the inner tube of giving vent to anger, adjust fixing bolt pass the lantern ring and with the contact of the inner tube of giving vent to anger, when the inner tube of giving vent to anger to the position of needs of regulation, screw and adjust fixing bolt until adjusting fixing bolt contacts the inner tube of giving vent to anger to the restriction is given vent to anger reciprocating of inner tube.
Further, the data on the graduated scale are data obtained through calculation, and the numerical value of the data represents the height difference between the oil level and the oil filling opening.
Further, the funnel is connected with the gear box in a sealing mode through threads.
Further, the supporting plate is a strip-shaped plate.
Further, the gear box matched with the oiling device is of a closed cavity structure.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the lubricating oil is filled to the height of the control liquid level according to the pressure intensity balance principle of the lubricating oil inlet, and the lubricating oil filling device with the adjustable liquid level is designed on the basis of the principle, the height control of the lubricating oil liquid level is realized by adjusting the height position of the air outlet of the control inner pipe, the height control can be directly read through the graduated scale, the oil quantity in the gear box can be controlled, the problem of fuzzy oil filling quantity can be well solved, the structure is simple, and the operation is convenient;
2. the invention is provided with two anti-backflow structures, wherein one of the anti-backflow structures is a sealing mechanism at the oil filling port and can prevent residual lubricating oil from flowing into the cavity due to the fact that the oil filling device is taken out, and the other anti-backflow structure is an inner pipe hole plug and can prevent the lubricating oil on the inner wall of the inner pipe from flowing back into the gear box, so that the accurate control of the oil quantity in the gear box can be guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a sectional view A-A of FIG. 2;
FIG. 4 is a side view of the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
FIG. 6 is a state diagram (state I) of the present invention when the inner outlet tube is exposed to oil;
FIG. 7 is a state diagram (state II) of the present invention when the oil level in the gear box is stable.
Illustration of the drawings:
1. a funnel; 11. an oil filling port; 2. an air outlet inner pipe; 3. a support plate; 4. a gear case; 5. a sealing mechanism; 51. a button; 52. a spring; 53. a seal ring; 54. a sealing seat; 55. a button fixing screw; 6. a bolt assembly; 7. an inner tube hole plug; 8. fixing the knob; 81. a collar; 82. and adjusting the fixing bolt.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
As shown in fig. 1 to 5, a gear box filling device of adjustable oil level, including funnel 1, give vent to anger inner tube 2 and backup pad 3, the bottom of funnel 1 is grease inlet 11 with 4 contact departments of gear box, be provided with backflow-proof sealing mechanism 5 in the inner chamber of funnel 1, backup pad 3 passes through bolt assembly 6 and 1 top fixed connection of funnel, be equipped with the hole of wearing out that supplies out inner tube 2 to wear out in the backup pad 3, the gas outlet department of inner tube 2 of giving vent to anger is equipped with backflow-proof inner tube hole stopper 7, be equipped with between inner tube 2 of giving vent to anger and the backup pad 3 and be used for guaranteeing 2 height-adjustable's fixed knob 8 in the inner tube 2 of giving vent to anger, the outer wall surface of inner tube 2 of giving vent to anger has set up the scale of vertical direction, numerical value on the scale can directly read the interior fluid level of gear box 4 from grease inlet 11 height and then calculate out the height of oil liquid level.
In this embodiment, go out to set up inner tube hole stopper 7 in the gas outlet of the inner tube 2 of giving vent to anger, when lubricating oil no longer flowed into 4 intracavitys of gear box, before dismantling filling device, cover inner tube hole stopper 7 earlier, dismantle filling device again, through the gas outlet that seals the inner tube 2 of giving vent to anger promptly, under atmospheric pressure's effect, the lubricating oil of the inner tube 2 inner wall of giving vent to anger can not flow back to the intracavity to make the inner tube 7 of giving vent to anger possess anti-reflux effect.
In this embodiment, the sealing mechanism 5 includes a button 51, a spring 52, a sealing ring 53 and a sealing seat 54, the button 51 is in contact with the spring 52, the button 51 is fixedly connected with the sealing seat 54, the spring 52 is in contact with the support plate 3, and the sealing seat 54 is fixedly connected with the sealing ring 53; the sealing ring 53 can contact with the plane of the inner cavity of the funnel 1 under the pushing action of the sealing seat 54, and the closing of the oil filling port 11 is realized.
In this embodiment, the button 51 is fixedly connected to the seal holder 54 by a button fixing screw 55.
In this embodiment, the number of the push buttons 51 is one, the number of the springs 52 is two, and the two springs 52 are symmetrically disposed on two sides of the inner outlet pipe 2.
In this embodiment, the fixing knob 8 includes a collar 81 and an adjusting fixing bolt 82, the collar 81 is sleeved on the outer wall of the inner outlet pipe 2, and the adjusting fixing bolt 82 passes through the collar 81 and contacts with the inner outlet pipe 2.
In this embodiment, the data on the scale is calculated, and the numerical value thereof indicates the height difference between the oil level and the oil filling port.
In this embodiment, the funnel 1 is connected to the gear box 4 by a screw seal.
In this embodiment, the supporting plate 3 is a strip-shaped plate.
In this embodiment, the gear box 4 used in cooperation with the above-mentioned oiling device is a sealed cavity structure.
The working principle of the invention is as follows: the height of the oil liquid in the gear box 4 after oiling is controlled by adjusting the height of the air outlet inner pipe 2. Because the inside of gear box 4 is airtight, only gives out gas in 2 exports of inner tube, when lubricating oil adds gradually to gear box 4 in, when the liquid level is higher than giving out gas in 2 bottoms of inner tube export, just gives the shutoff with the only export of gear box 4, according to ideal gas equation:
where P refers to the pressure of the ideal gas, V is the volume of the ideal gas, and T represents the thermodynamic temperature of the ideal gas. When the temperature T is unchanged, in the oil injection process, the oil level is set to be in a state I when touching the bottom of the air outlet inner tube 2, the oil level cannot rise again and is set to be in a state II when reaching stability, and the state I and the state II are shown in the attached figures 6 and 7, so that the following can be known according to an ideal gas equation:
P1V1＝P2V2 (2)
where P1 is the pressure in state I, i.e. equal to atmospheric pressure, V1 is the internal gas volume of the gearbox 4 in state I, P2 is the pressure in the gearbox 4 in state II, and V2 is the internal gas volume of the gearbox 4 in state II.
According to the liquid pressure formula:
P＝ρgh (3)
wherein P is the pressure at the bottom of the liquid, rho is the density of the lubricating oil, g is the gravity acceleration, and h is the height of the lubricating oil from the upper oil level.
Combining the ideal gas equation and the liquid pressure formula, when the oil injection process enters the state I and the state II is stable, the pressure difference inside and outside the gear box 4 is equal to the pressure difference between the upper liquid level and the lower liquid level of the lubricating oil in the inner cavity of the funnel 1, namely:
P2-P1＝ρgh2＝ρgh3 (4)
combining formula (2), formula (3) and formula (4) yields:
for example, assume a cavity volume of 3L and a lubricant density of 0.91X10 in the interior of the gearbox 4 at State I3(kg/m3) When entering the state 2, the volume is 2.99L, and the h is obtained by carrying in the formula 52Is 37mm, this h2The numerical value of the (C) can be subjected to macroscopic quantitative control; therefore, when the state I enters the state II, the lubricating oil in the cavity of the gear box 4 in the state I and the state II is increased by 0.01L, and the influence on the oil level is small, so that the lubricating oil level in the cavity of the gear box 4 in the state I and the state II can be considered to be equal in the accuracy error range.
In conclusion, the macroscopic control of the oil liquid level position in the gear box 4 can be realized by adjusting the height of the bottom of the air outlet inner pipe 2.
Claims (8)
1. The utility model provides a gear box filling device of adjustable oil level which characterized in that: comprises a funnel (1), an air outlet inner tube (2) and a support plate (3), wherein an oil filling port (11) is arranged at the contact part of the bottom of the funnel (1) and a gear box (4), a backflow preventing sealing mechanism (5) is arranged in an inner cavity of the funnel (1), the supporting plate (3) is fixedly connected with the top end of the funnel (1) through a bolt component (6), the supporting plate (3) is provided with a through hole for the air outlet inner pipe (2) to penetrate out, an anti-backflow inner pipe hole plug (7) is arranged at the air outlet of the air outlet inner pipe (2), a fixing knob (8) used for ensuring that the height of the air outlet inner pipe (2) is adjustable is arranged between the air outlet inner pipe (2) and the supporting plate (3), a scale in the vertical direction is arranged on the outer wall surface of the air outlet inner pipe (2), the height of the oil surface in the gear box (4) from the oil filling port (11) can be directly read through the numerical value on the graduated scale, and then the height of the oil surface is converted;
the sealing mechanism (5) comprises a button (51), a spring (52), a sealing ring (53) and a sealing seat (54), the button (51) is in contact with the spring (52), the button (51) is fixedly connected with the sealing seat (54), the spring (52) is in contact with the support plate (3), and the sealing seat (54) is fixedly connected with the sealing ring (53); the sealing ring (53) can be in contact with the plane of the inner cavity of the funnel (1) under the pushing action of the sealing seat (54), so that the oil filling port (11) is closed.
2. The adjustable-level gearbox oiling device of claim 1, wherein: the button (51) is fixedly connected with the sealing seat (54) through a button fixing screw (55).
3. The adjustable-level gearbox oiling device of claim 1, wherein: the number of the buttons (51) is one, the number of the springs (52) is two, and the two springs (52) are symmetrically arranged on two sides of the air outlet inner pipe (2).
4. Oil level adjustable gearbox refuelling device according to any of the claims 1-3, characterized in that: the fixed knob (8) comprises a sleeve ring (81) and an adjusting and fixing bolt (82), the sleeve ring (81) is sleeved on the outer wall of the air outlet inner tube (2), and the adjusting and fixing bolt (82) penetrates through the sleeve ring (81) and is in contact with the air outlet inner tube (2).
5. Oil level adjustable gearbox refuelling device according to any of the claims 1-3, characterized in that: the data on the graduated scale are obtained through calculation, and the numerical value of the data represents the height difference between the oil level and the oil filling opening.
6. Oil level adjustable gearbox refuelling device according to any of the claims 1-3, characterized in that: the funnel (1) is connected with the gear box (4) in a sealing mode through threads.
7. Oil level adjustable gearbox refuelling device according to any of the claims 1-3, characterized in that: the supporting plate (3) is a strip-shaped plate.
8. Oil level adjustable gearbox refuelling device according to any of the claims 1-3, characterized in that: the gear box (4) matched with the oiling device is of a closed cavity structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811429570.7A CN111237438B (en) | 2018-11-28 | 2018-11-28 | Gear box oiling device capable of adjusting oil level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811429570.7A CN111237438B (en) | 2018-11-28 | 2018-11-28 | Gear box oiling device capable of adjusting oil level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237438A CN111237438A (en) | 2020-06-05 |
| CN111237438B true CN111237438B (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811429570.7A Active CN111237438B (en) | 2018-11-28 | 2018-11-28 | Gear box oiling device capable of adjusting oil level |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050896A (en) * | 2020-07-22 | 2020-12-08 | 马鞍山市龙腾机电科技有限公司 | Garage parking transmission housing lubricating oil breathing detection device that takes a breath |
| CN112797144B (en) * | 2021-01-21 | 2021-08-27 | 大庆金亿弘宇石油机械设备有限公司 | Oil saving device for sealing shaft head of reduction gearbox of oil pumping unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408584A (en) * | 1980-07-16 | 1983-10-11 | Fuji Jukogyo Kabushiki Kaisha | Air-fuel ratio control system |
| CN2573841Y (en) * | 2002-09-21 | 2003-09-17 | 王校兴 | Adjustable level oiling cup |
| WO2007097650A1 (en) * | 2006-02-27 | 2007-08-30 | Maciej Bartlomiej Kawa | Small scale air heating appliance |
| CN201553131U (en) * | 2009-12-30 | 2010-08-18 | 胡适 | Oil filling meter |
| CN203659582U (en) * | 2013-11-29 | 2014-06-18 | 国家电网公司 | Transformer oiling automatic stopping device |
| CN105489351A (en) * | 2015-11-20 | 2016-04-13 | 宁波甬嘉变压器有限公司 | Oil supplement device and oil supplement method for fully-sealed oil-immersed transformer |
| CN205973754U (en) * | 2016-07-01 | 2017-02-22 | 李安卓 | Funnel convenient to fluid pours into into fast |
| CN206846268U (en) * | 2017-07-03 | 2018-01-05 | 中国长江电力股份有限公司 | A kind of motor oiling special funnel |
-
2018
- 2018-11-28 CN CN201811429570.7A patent/CN111237438B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408584A (en) * | 1980-07-16 | 1983-10-11 | Fuji Jukogyo Kabushiki Kaisha | Air-fuel ratio control system |
| CN2573841Y (en) * | 2002-09-21 | 2003-09-17 | 王校兴 | Adjustable level oiling cup |
| WO2007097650A1 (en) * | 2006-02-27 | 2007-08-30 | Maciej Bartlomiej Kawa | Small scale air heating appliance |
| CN201553131U (en) * | 2009-12-30 | 2010-08-18 | 胡适 | Oil filling meter |
| CN203659582U (en) * | 2013-11-29 | 2014-06-18 | 国家电网公司 | Transformer oiling automatic stopping device |
| CN105489351A (en) * | 2015-11-20 | 2016-04-13 | 宁波甬嘉变压器有限公司 | Oil supplement device and oil supplement method for fully-sealed oil-immersed transformer |
| CN205973754U (en) * | 2016-07-01 | 2017-02-22 | 李安卓 | Funnel convenient to fluid pours into into fast |
| CN206846268U (en) * | 2017-07-03 | 2018-01-05 | 中国长江电力股份有限公司 | A kind of motor oiling special funnel |
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| CN111237438A (en) | 2020-06-05 |
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Effective date of registration: 20240906 Address after: No. 201, R&D Building, Phase 2.1 A, Xinma Power Innovation Park, No. 899 Xianyue Ring Road, Majiahe Street, Tianyuan District, Zhuzhou City, Hunan Province, 412000 Patentee after: Hunan CRRC Commercial Vehicle Power Technology Co.,Ltd. Country or region after: China Address before: Liyu Industrial Park, national high tech Development Zone, Zhuzhou City, Hunan Province Patentee before: Zhongche Times Electric Vehicle Co.,Ltd. Country or region before: China |
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