CN110509721B - Vehicle lightweight electric drive axle assembly and commercial vehicle chassis structure - Google Patents
Vehicle lightweight electric drive axle assembly and commercial vehicle chassis structure Download PDFInfo
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- CN110509721B CN110509721B CN201910932455.XA CN201910932455A CN110509721B CN 110509721 B CN110509721 B CN 110509721B CN 201910932455 A CN201910932455 A CN 201910932455A CN 110509721 B CN110509721 B CN 110509721B
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- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 230000000903 blocking effect Effects 0.000 description 12
- 230000001681 protective effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention discloses a vehicle light-weight electric drive axle assembly and a commercial vehicle chassis structure, and particularly relates to the field of electric drive axle assemblies. According to the invention, through arranging the first spring, the movable shaft, the side shaft and the fixed button, when two ends of the main body are required to be connected with the wheels, the fixed rod on one side of the fixed disc can be rotated firstly until the fixture block slides into the vertical groove, at the moment, the first spring in the side shaft can push the movable shaft to one side and push the fixed disc on one end of the movable shaft to one side, so that the fixed shafts on two ends of the main body are expanded to two sides, the fixed shaft is pushed out from the inside of the automobile to two sides, and people can conveniently install the wheels.
Description
Technical Field
The invention relates to the field of electric drive axle assemblies, in particular to a vehicle light-weight electric drive axle assembly and a commercial vehicle chassis structure.
Background
The whole commercial vehicle with new energy is electrified and reformed on the basis of the original vehicle type, and the motor replaces an internal combustion engine to develop a motor and a control system on the basis of keeping the basic structure of a traditional vehicle transmission system and keeping transmission parts such as a traditional vehicle transmission shaft, a rear axle, a half axle and the like.
However, in practical use, the existing drive axle assembly is fixedly connected with the wheel through the bolt, the whole structure of the drive axle assembly is compact, the space for mounting the wheel is limited, and people cannot operate easily.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a vehicle light-weight electric drive axle assembly and a chassis structure of a commercial vehicle, where a first spring, a movable shaft, a side shaft, and a fixing button are provided, when two ends of a main body need to be connected to wheels, a fixing rod on one side of a fixing plate may be rotated until a fixture block slides into a vertical groove, at this time, the first spring in the side shaft pushes the movable shaft to one side to push out the fixing plate on one end of the movable shaft to one side, so that two sides of the fixing shaft on two ends of the main body are unfolded to push out the fixing shaft from the inside of the vehicle to two sides, thereby facilitating people to install the wheels.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a vehicular lightweight electric drive axle assembly, includes the main part, front end fixed mounting have the motor, the both ends fixed mounting of main part has two side shafts, two the side shaft is symmetrical arrangement, the one end fixed mounting of side shaft has the fixed disk, one side fixed mounting of fixed disk has the fixed axle, the inside of side shaft is provided with the loose axle, side shaft and loose axle swing joint, the inside of loose axle is provided with interior axle, the surface cover of interior axle is equipped with first spring, one side of fixed disk is provided with a plurality of dead lever, a plurality of the dead lever is the annular arrangement, fixed disk and dead lever swing joint, the one end fixed mounting of dead lever has the chuck, the one end of dead lever is provided with fixed button, the outer fixed surface of fixed button installs two fixture blocks, the spout has been seted up to the inner wall of chuck, the inner wall of chuck is located one side of spout and has seted up perpendicular groove.
In a preferred embodiment, a connecting rod is arranged inside the fixed shaft, and the fixed shaft is movably connected with the connecting rod.
In a preferred embodiment, one end of the inner shaft is fixedly connected with a connecting rod, and a speed reducer is fixedly mounted inside the main body.
In a preferred embodiment, two bottom covers are fixedly mounted at the bottom end of the chassis, the two chassis are symmetrically arranged, a protective cover is arranged inside the bottom covers, and the bottom covers are sleeved on the outer surface of the motor.
In a preferred embodiment, the protective cover is movably connected with the bottom cover, and a snap ring is fixedly installed at the top end of the protective cover.
In a preferred embodiment, the bottom cover is movably connected with the protective cover through a snap ring, and a sound insulation cavity is formed inside the bottom cover.
In a preferred embodiment, a second spring is fixedly installed inside the bottom cover, a blocking piece is fixedly installed at the top end of the second spring, and the blocking piece is movably connected with the bottom cover through the second spring.
In a preferred embodiment, four bottom rods are arranged at the bottom end of the base plate and are arranged in a rectangular shape, and a fixing plate is arranged at the top end of the base plate.
In a preferred embodiment, a guide pillar is fixedly mounted inside the fixing plate, an inner rod is fixedly mounted inside the bottom rod, and a third spring is sleeved on the outer surface of the inner rod.
In a preferred embodiment, a stop ring is arranged on the outer surface of the inner rod and positioned at the upper end of the third spring, the top end of the third spring is fixedly connected with the stop ring, and the stop ring is movably connected with the inner rod through the third spring.
The invention has the technical effects and advantages that:
1. according to the invention, the first spring, the movable shaft, the side shaft and the fixed button are arranged, when two ends of the main body are required to be connected with the wheels, the fixed rod on one side of the fixed disc can be rotated firstly until the clamping block slides into the vertical groove, at the moment, the first spring in the side shaft can push the movable shaft to one side and push the fixed disc on one end of the movable shaft to one side, so that the fixed shafts on two ends of the main body are expanded to two sides, and the fixed shaft is pushed out from the inside of the automobile to two sides;
2. according to the invention, the motor, the bottom cover and the sound insulation cavity of the protective cover are arranged, people can enable the protective cover to downwards rotate through the clamping ring at one end, so that the space of the bottom cover is increased, people can conveniently protect the motor, the noise generated by the motor in the use process can be isolated through the sound insulation cavity, the noise generated by the motor in the work process is prevented from being transmitted to the outer surface, the motor generates vibration in the work process, and can be transmitted to the blocking piece firstly, and then the vibration is weakened through the second spring, so that the loss caused by the work to the motor is reduced, the service life of the motor is prolonged, and compared with the conventional chassis, the protection performance of the chassis is improved;
3. according to the chassis, the bottom rod, the guide pillar, the third spring and the blocking piece are arranged, when the chassis is impacted in the running process of a vehicle, the chassis can drive the bottom rod to move to one side of the fixing plate, the bottom rod can move upwards along the guide pillar, the blocking piece and the third spring can be extruded downwards by the guide pillar, so that the impact force on the chassis is relieved, in the process of extruding the third spring, the blocking piece can move downwards along the inner rod, after the impact force is dissipated, the blocking piece can be pushed upwards by the third spring, so that the chassis is driven to return to the original position, and the damage of the chassis caused by external force is avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a side view of the holding pan of the present invention.
Fig. 3 is an internal view of the side shaft of the present invention.
Fig. 4 is a connection structure diagram of the fixing rod and the fixing button of the present invention.
Fig. 5 is a sectional view of a fixing lever of the present invention.
Fig. 6 is a schematic structural diagram of the chassis of the present invention.
Fig. 7 is a schematic structural diagram of the bottom cover of the present invention.
Fig. 8 is a schematic structural diagram of the bottom cover of the present invention.
Fig. 9 is a side view of the bottom cover of the present invention.
Fig. 10 is an internal structural view of the bottom bar of the present invention.
The reference signs are: the device comprises a main body 1, a motor 11, a 2-side shaft, a 21 movable shaft, a 22 inner shaft, a 23 first spring, a 3 fixed disc, a 31 fixed disc, a 32 chuck, a 33 fixed button, a 34 clamping block, a 35 sliding groove, a 36 vertical groove, a 4 fixed shaft, a 41 connecting rod, a 5 chassis, a 51 bottom cover, a 52 protective cover, a 53 clamping ring, a 54 sound insulation cavity, a 55 second spring, a 56 blocking piece, a 6 bottom rod, a 61 fixed plate, a 62 guide column, a 63 inner rod, a 64 third spring and a 65 blocking ring.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
According to a light-weight electric drive axle assembly for a vehicle shown in fig. 1-5, including main part 1, the front end fixed mounting of main part 1 has motor 11, the both ends fixed mounting of main part 1 has two side shafts 2, two side shafts 2 are symmetrical arrangement, the one end fixed mounting of side shaft 2 has fixed disk 3, one side fixed mounting of fixed disk 3 has fixed axle 4, the inside of side shaft 2 is provided with loose axle 21, side shaft 2 and loose axle 21 swing joint, the inside of loose axle 21 is provided with interior axle 22, the surface cover of interior axle 22 is equipped with first spring 23, one side of fixed disk 3 is provided with a plurality of dead lever 31, a plurality of dead lever 31 is the annular arrangement, fixed disk 3 and dead lever 31 swing joint, the one end fixed mounting of dead lever 31 has chuck 32, the one end of dead lever 31 is provided with fixed button 33, the surface fixed mounting of fixed button 33 has fixture block 34, the spout 35 has been seted up to the inner wall of chuck 32, the inner wall of fixed disk 32 is located one side of spout 35 and has seted up vertical groove 36, the inside of connecting rod 41 is provided with connecting rod 41, interior fixed shaft 4 and connecting rod 41, fixed connection of fixed shaft 22 and the inside fixed shaft 1.
The implementation mode specifically comprises the following steps: when two ends of the main body 1 need to be connected with wheels, the fixing rod 31 on one side of the fixed disc 3 can be rotated firstly, the fixing rod 31 drives the side chuck 32, the clamping blocks 34 on two sides of the fixing button 33 slide in the sliding grooves 35 until the clamping blocks 34 slide in the vertical grooves 36, at this time, the first spring 23 in the side shaft 2 can push the movable shaft 21 to one side and push the fixed disc 3 at one end of the movable shaft 21 to one side, so that the fixing shafts 4 at two ends of the main body are unfolded to two sides and push the fixing shafts 4 out from two sides in an automobile, people can conveniently install the wheels, the clamping blocks 34 can slide out to one side along the vertical grooves 36 in the process that the fixing shafts 4 move to one side, after the installation is finished, the movable shaft 21 is pushed inwards to extrude the first spring 23 in the automobile and finally the fixing is carried out through the fixing rod 31, and the embodiment solves the problem that the installation space of the wheels is small in the prior art.
According to the vehicle light-weight electric drive axle assembly and the chassis structure of the commercial vehicle shown in fig. 6-8, four bottom rods 6 are arranged at the bottom end of the chassis 5, the four bottom rods 6 are arranged in a rectangular shape, a fixing plate 61 is arranged at the top end of the chassis 5, a guide post 62 is fixedly arranged inside the fixing plate 61, an inner rod 63 is fixedly arranged inside the bottom rod 6, a third spring 64 is sleeved on the outer surface of the inner rod 63, a stop ring 65 is arranged on the outer surface of the inner rod 63 and positioned at the upper end of the third spring 64, the top end of the third spring 64 is fixedly connected with the stop ring 65, and the stop ring 65 is movably connected with the inner rod 63 through the third spring 64;
the implementation mode is specifically as follows: when installing chassis 5, can establish bottom 51 cover on chassis 5 on the motor 11 of main part 1, in the in-process of installation, the bottom of motor 11 can promote separation blade 56 in the bottom 51 downwards, extrude second spring 55, and people can rotate the snap ring 53 through one end downwards with protection casing 52, thereby bottom 51's space has been increased, be convenient for people protect motor 11, the noise that motor 11 produced in the use, can isolate through sound insulation chamber 54, the noise of avoiding motor work passes to the surface, motor 11 produces vibrations at the course of the work, can transmit earlier on separation blade 56, weaken through second spring 55, thereby reduce the loss that work led to the fact motor 11, motor 11's life has been increased, chassis 5's protectiveness has been increased, this embodiment has solved among the prior art, the lower problem of motor protectiveness.
According to the vehicle light-weight electric drive axle assembly and the chassis structure of the commercial vehicle shown in fig. 9-10, the chassis structure of the commercial vehicle matched with the light-weight electric drive axle assembly comprises a chassis 5, two bottom covers 51 are fixedly installed at the bottom end of the chassis 5, the two chassis 5 are symmetrically arranged, a protective cover 52 is arranged inside the bottom cover 51, the bottom cover 51 is sleeved on the outer surface of the motor 11, the protective cover 52 is movably connected with the bottom cover 51, a clamping ring 53 is fixedly installed at the top end of the protective cover 52, the bottom cover 51 is movably connected with the protective cover 52 through the clamping ring 53, and a sound insulation cavity 54 is formed inside the bottom cover 51;
the implementation mode is specifically as follows: when the vehicle receives the impact in the in-process chassis 5 of traveling, chassis 5 can drive sill bar 6 and remove to one side of fixed plate 61, sill bar 6 can be along guide pillar 62 rebound, guide pillar 62 can be with separation blade and third spring 64 downward extrusion, thereby alleviate chassis 5 and receive the impact force, carry out the extruded in-process to third spring 64, separation blade 56 can be along interior pole 63 rebound, after the impact force dissipates, third spring 55 can upwards release separation blade 56, thereby drive chassis 5 and get back to the normal position, thereby avoid external force to cause the damage to chassis 5, the practicality of chassis 5 has been increased, among this embodiment has solved prior art, the problem that chassis barrier propterty can hang down.
The working principle of the invention is as follows:
referring to fig. 1-5 of the specification, when the two ends of the main body 1 need to be connected with the wheels, the fixing rod 31 on one side of the fixing plate 3 can be rotated, the fixing rod 31 drives the chuck 32 on one side, so that the clamping blocks 34 on the two sides of the fixing button 33 slide in the sliding grooves 35 until the clamping blocks 34 slide in the vertical grooves 36, at this time, the first spring 23 in the side shaft 2 can push the movable shaft 21 to one side, and push the fixing plate 3 on one end of the movable shaft 21 to one side, so that the fixing shafts 4 on the two ends of the main body can be unfolded to two sides, and the fixing shafts 4 can be pushed out from the inside of the automobile to two sides;
referring to the description and the accompanying drawings 6-8, when the chassis 5 is installed, the bottom cover 51 on the chassis 5 is sleeved on the motor 11 of the main body 1, in the installation process, the bottom end of the motor 11 pushes the baffle 56 in the bottom cover 51 downwards to extrude the second spring 55, and people can rotate the protective cover 52 downwards through the snap ring 53 at one end, so that the space of the bottom cover 51 is increased, the noise generated by the motor 11 in the use process can be isolated through the sound isolation cavity 54, the noise generated by the motor during operation is prevented from being transmitted to the outer surface, the vibration generated by the motor 11 in the working process can be transmitted to the baffle 56 firstly, and then the vibration is weakened through the second spring 55;
referring to fig. 9-10 of the specification, when the chassis 5 is impacted during the running of a vehicle, the chassis 5 will drive the bottom rod 6 to move to one side of the fixing plate 61, the bottom rod 6 will move upwards along the guide post 62, the guide post 62 will press the blocking piece and the third spring 64 downwards, so as to relieve the impact on the chassis 5, the blocking piece 56 will move downwards along the inner rod 63 during the process of pressing the third spring 64, and after the impact is dissipated, the third spring 55 will push the blocking piece 56 upwards, so as to drive the chassis 5 to return to the original position.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiment of the invention, only the structures related to the disclosed embodiment are related, other structures can refer to common design, and the same embodiment and different embodiments of the invention can be combined mutually under the condition of no conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (3)
1. The utility model provides an automobile-used lightweight electric drive axle assembly, includes main part (1), its characterized in that: the front end fixed mounting of (1) has motor (11), the both ends fixed mounting of main part (1) has two side shafts (2), two side shafts (2) are the symmetrical arrangement, the one end fixed mounting of side shaft (2) has fixed disk (3), one side fixed mounting of fixed disk (3) has fixed axle (4), the inside of side shaft (2) is provided with loose axle (21), side shaft (2) and loose axle (21) swing joint, the inside of loose axle (21) is provided with interior axle (22), the surface cover of interior axle (22) is equipped with first spring (23), one side of fixed disk (3) is provided with a plurality of dead lever (31), a plurality of dead lever (31) are the annular arrangement, fixed disk (3) and dead lever (31) swing joint, the one end fixed mounting of dead lever (31) has chuck (32), the one end of dead lever (31) is provided with fixed button (33), the surface fixed mounting of fixed button (33) has two fixture blocks (34), the spout (35) has been seted up to the inner wall of chuck (32), the inner wall of chuck (32) is located one side when carrying out the spout (36) and the wheel groove (36) and connect the wheel with the wheel groove (1), the fixed rod (31) on one side of the fixed disc (3) is rotated, the fixed rod (31) drives the chuck (32) on one side, the clamping blocks (34) on two sides of the fixed button (33) slide in the sliding grooves (35) until the clamping blocks (34) slide in the vertical grooves (36), at the moment, the first spring (23) in the side shaft (2) can push the movable shaft (21) to one side, the fixed disc (3) on one end of the movable shaft (21) is pushed out to one side, and therefore the fixed shafts (4) on two ends of the main body are unfolded to two sides, and the fixed shafts (4) are pushed out to two sides from the inside of the automobile.
2. The vehicular light-weight electric drive axle assembly according to claim 1, wherein: the inside of fixed axle (4) is provided with connecting rod (41), fixed axle (4) and connecting rod (41) swing joint.
3. The vehicular light-weight electric drive axle assembly according to claim 1, wherein: one end of the inner shaft (22) is fixedly connected with a connecting rod (41), and a speed reducer is fixedly mounted inside the main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932455.XA CN110509721B (en) | 2019-09-29 | 2019-09-29 | Vehicle lightweight electric drive axle assembly and commercial vehicle chassis structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932455.XA CN110509721B (en) | 2019-09-29 | 2019-09-29 | Vehicle lightweight electric drive axle assembly and commercial vehicle chassis structure |
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| Publication Number | Publication Date |
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| CN110509721A CN110509721A (en) | 2019-11-29 |
| CN110509721B true CN110509721B (en) | 2023-04-07 |
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| CN201910932455.XA Active CN110509721B (en) | 2019-09-29 | 2019-09-29 | Vehicle lightweight electric drive axle assembly and commercial vehicle chassis structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572059B (en) * | 2020-12-09 | 2022-11-29 | 中车长江铜陵车辆有限公司 | Anti-fracture axle |
| CN116872650B (en) * | 2023-09-05 | 2023-11-14 | 潍坊德佑传动机械有限公司 | Agricultural machine driving axle |
Citations (4)
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|---|---|---|---|---|
| WO2017114419A1 (en) * | 2015-12-31 | 2017-07-06 | 比亚迪股份有限公司 | Vehicle and drive axle component for use in vehicle |
| CN108944391A (en) * | 2018-06-28 | 2018-12-07 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of automobile-used lightweight electric drive axle assembly and commercial vehicle chassis structure |
| CN110091667A (en) * | 2019-06-05 | 2019-08-06 | 黄石弘诚机械有限公司 | A kind of vehicle rear axle assembly being easily assembled |
| CN110091688A (en) * | 2019-06-05 | 2019-08-06 | 黄石弘诚机械有限公司 | A kind of vehicle rear axle assembly that anti-impact force is strong |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7938210B2 (en) * | 2004-06-15 | 2011-05-10 | Massachusetts Institute Of Technology | Wheel-embedded suspension |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017114419A1 (en) * | 2015-12-31 | 2017-07-06 | 比亚迪股份有限公司 | Vehicle and drive axle component for use in vehicle |
| CN108944391A (en) * | 2018-06-28 | 2018-12-07 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of automobile-used lightweight electric drive axle assembly and commercial vehicle chassis structure |
| CN110091667A (en) * | 2019-06-05 | 2019-08-06 | 黄石弘诚机械有限公司 | A kind of vehicle rear axle assembly being easily assembled |
| CN110091688A (en) * | 2019-06-05 | 2019-08-06 | 黄石弘诚机械有限公司 | A kind of vehicle rear axle assembly that anti-impact force is strong |
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| CN110509721A (en) | 2019-11-29 |
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Effective date of registration: 20240627 Address after: No. 67 Bibo East Street, Economic and Technological Development Zone, Binhai New Area, Tianjin, 300000 Patentee after: Longitudinal Automotive Industrial Engineering Research (Tianjin) Co.,Ltd. Country or region after: China Address before: 132022 No. 45 Chengde street, Longtan District, Jilin, Jilin Patentee before: JILIN INSTITUTE OF CHEMICAL TECHNOLOGY Country or region before: China |