CN113389896A - Wedge-shaped block gear shifting structure - Google Patents
Wedge-shaped block gear shifting structure Download PDFInfo
- Publication number
- CN113389896A CN113389896A CN202010175589.4A CN202010175589A CN113389896A CN 113389896 A CN113389896 A CN 113389896A CN 202010175589 A CN202010175589 A CN 202010175589A CN 113389896 A CN113389896 A CN 113389896A
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- Prior art keywords
- wedge
- plate
- friction plate
- dual
- friction
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Classifications
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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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
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/10—Braking arrangements
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
- F16H63/3026—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure comprising friction clutches or brakes
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
- F16H63/3043—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force comprising friction clutches or brakes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a wedge-shaped block gear shifting structure, which comprises a friction plate and a dual plate which are arranged in a gear shifting mechanism of a planetary gear transmission, wherein at least one wedge-shaped part is arranged on the side surface, which is attached to the dual plate, of the friction plate, one side of the wedge-shaped part is an inclined surface, the other side of the wedge-shaped part is a blocking surface vertical to the friction plate, a hole part, a groove part or a wedge-shaped convex part is arranged on the side surface, which is attached to the friction plate, of the dual plate, one side of the wedge-shaped convex part is an inclined surface, the other side of the wedge-shaped convex part is a limiting surface, and the hole part, the groove part or the wedge-shaped convex part and the wedge-shaped part are arranged in a one-to-one correspondence mode.
Description
Technical Field
The invention relates to a wedge-shaped block gear shifting structure.
Background
In the field of traditional automobile planetary gear transmissions, a brake unit of a planetary gear transmission gear shifting actuating mechanism, a multi-plate wet brake and a one-way overrunning clutch are used simultaneously or a belt brake and the one-way overrunning clutch are used simultaneously and are generally applied, the multi-plate wet brake enables power transmission to be smooth and soft, the service life is long, down-shifting impact is effectively eliminated by application of the one-way overrunning clutch, gear shifting time is shortened, and energy loss is reduced.
However, the application of two units increases the cost and the volume of the transmission; the pressure required for pressing the friction plate is large, generally about 5000N, if the pressure is small, the friction plate is easy to slip and cannot effectively transmit power, the friction plate is easy to burn, and in order to ensure pressing force, the volume, the cost and the energy loss of a gear shifting power source are increased.
Disclosure of Invention
The invention provides a wedge-shaped block gear shifting structure.
The technical scheme includes that the wedge-shaped block gear shifting structure comprises a friction plate and a dual plate which are installed in a gear shifting mechanism of a planetary gear transmission, at least one wedge-shaped part is arranged on the side face, attached to the dual plate, of the friction plate, one side of the wedge-shaped part is an inclined face, the other side of the wedge-shaped part is a blocking face of the friction plate, an included angle between the blocking face and the friction plate is 85-90 degrees, a hole part, a groove part or a wedge-shaped convex part is arranged on the side face, attached to the friction plate, of the dual plate, one side of the wedge-shaped convex part is an inclined face, the other side of the wedge-shaped convex part is a limiting face, and the hole part, the groove part or the wedge-shaped convex part and the wedge-shaped part are arranged in a one-to-one correspondence mode.
Furthermore, when a plurality of wedge-shaped parts are arranged, the circumferences of the wedge-shaped parts are uniformly distributed on the friction sheet.
Further, the size of the hole or groove portion is larger than the size of the wedge portion.
Further, the gear shifting mechanism comprises a shell, a driver push disc, a wedge block assembly, a dual plate, a support plate and a middle shaft, wherein the driver push disc, the wedge block assembly, the dual plate, the support plate and the middle shaft are installed in the shell, the wedge block assembly comprises a friction plate, a connecting rod, an elastic body and a separation blade which are sequentially arranged from front to back, the friction plate is in sliding connection with a spline groove on the middle shaft through a spline on an inner ring of the friction plate, the dual plate is located on the front side of the friction plate, the driver push disc is located on the front side of the dual plate, the periphery of the dual plate is in sliding connection with the spline groove on the shell through the spline, two ends of the elastic body respectively lean against the separation blade, the friction plate or the separation blade and the friction plate are respectively connected and fixed, one end of the connecting rod is fixedly connected with one of the separation blade, the support sheet is fixedly arranged in the shell and is positioned at the rear side of the baffle sheet.
Further, the baffle is not connected with the middle shaft.
Furthermore, the baffle plate is in sliding connection with the spline groove on the intermediate shaft through a spline on the inner ring of the baffle plate.
Furthermore, the intermediate shaft is a gear ring, a sun gear or a planet carrier of the planet row, and the outer ring of the intermediate shaft is provided with a spline groove.
Compared with the prior art, the invention has the following beneficial effects: simple structure, reasonable in design, easily processing realizes, is applicable to electric automobile planetary gear derailleur gearshift, and the friction disc is difficult for burning the piece, when effective transmission power, can reduce cost, reduce volume, reduction energy loss.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic structural view of a friction plate;
FIG. 2 is a schematic view of the wedge;
FIG. 3 is a schematic structural view of a dual plate;
FIG. 4 is a schematic view of the structure of the shift mechanism with elastomer in the rotating member;
FIG. 5 is a schematic view of a shift mechanism with elastomer in the non-rotating member;
fig. 6 is a schematic structural view of a shift mechanism without an elastic body.
In the figure: 1-friction plate; 2-a wedge; 3-dual slice; 4-a pore section; 5-a shell; 6-drive push plate; 7-intermediate shaft; 8-an elastomer; 9-a baffle plate; 10-a connecting rod; 11-a limiting block; 12-a support sheet; 13-a fluid conduit; 14-a sealed cavity; 15-a piston; 16-sealing ring.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1 to 6, a wedge shift structure includes a friction plate, a counter plate installed in a shift mechanism of a planetary gear transmission, at least one wedge-shaped part is arranged on the side surface of the friction plate, which is jointed with the dual plate, one side of the wedge-shaped part is an inclined surface, the other side of the wedge-shaped part is a blocking surface which is vertical or approximately vertical to the friction plate, the included angle between the blocking surface and the friction plate is 85-90 degrees, the side surface of the dual-disc, which is jointed with the friction disc, is provided with a hole part, a groove part or a wedge-shaped convex part, one side of the wedge-shaped convex part is an inclined surface, and the other side is a limiting surface, the limiting surface is a cambered surface or a plane, the hole part, the groove part or the wedge-shaped convex part and the wedge-shaped part are arranged in one-to-one correspondence, preferably, the dual piece is provided with a hole part, the wedge part on the friction plate is provided with an inclined plane, and when the positive rotation is input and the friction plate rotates relative to the dual piece, the inclined plane rotates relative to the dual piece from low to high; the wedge-shaped part on the friction plate is provided with a blocking surface which is distributed on the high side of the inclined plane, and when the intermediate shaft has a reverse trend, the blocking surface is blocked by the blocking surface of the dual plate, so that the intermediate shaft is braked.
In this embodiment, the hole and the groove may have no slope or a slope, and preferably have no slope, and the pair of wedge-shaped protrusions face the friction plate wedge.
In this embodiment, when a plurality of wedge portions are provided, the respective wedge portions are circumferentially and uniformly distributed on the friction plate.
In this embodiment, the size of the hole portion or the groove portion is larger than that of the wedge portion, when the dual plate and the friction plate are rotationally connected, the wedge portion can be wedged into the hole, when the intermediate shaft is rotationally connected, the wedge portion on the friction plate slides over the edge of the hole on the dual plate from low to high, when the intermediate shaft has a tendency of reverse rotation, the blocking surface on the wedge portion is blocked by the blocking surface on the dual plate, and the intermediate shaft cannot rotate relatively, so that the intermediate shaft is braked.
In this embodiment, the gear shift mechanism includes a housing and a driver push-plate, a wedge-shaped block assembly, a dual-plate, a support plate, a middle shaft installed in the housing, the wedge-shaped block assembly includes a friction plate, a connecting rod, an elastic body, a separation blade, the friction plate, the separation blade are connected with a spline groove on the middle shaft through a spline on an inner ring of the friction plate and a spline groove on the middle shaft in a sliding manner, the dual-plate is located on the front side of the friction plate, the driver push-plate is located on the front side of the dual-plate, the periphery of the dual-plate is connected with the spline groove on the housing through the spline, two ends of the elastic body are respectively abutted against the separation blade, the friction plate or the separation blade and the friction plate are respectively connected and fixed, one end of the connecting rod is connected and fixed with one of the separation blade or one of the friction plate, the other end of the connecting rod is connected with the friction plate or the separation blade in a sliding manner, a fixing plate is fixed with the connecting rod, the movable plate is installed on the connecting rod on both sides of the movable plate in front and back, the support sheet is fixedly arranged in the shell and positioned on the rear side of the support sheet, the joint surface of the support sheet and the support sheet is preferably made into a plane, when the electric vehicle is in reverse gear, the friction sheet is pushed to the designed limit position by the driver push disc, the elastic body can not be compressed any more, when the input power is reversed, the driver has enough pressure or can not compress a power medium, the reaction force of the wedge part on the friction sheet on the dual sheet can not enable the driver push disc to retreat, the friction sheet can not rotate relative to the dual sheet under the action of the wedge part by utilizing the inclined surface for blocking, so that the middle shaft is braked, and the reverse gear is realized.
In this embodiment, the support sheet is fixedly connected to the housing, the fixedly connecting manner includes, but is not limited to, a bolt, a snap spring, a spline, a snap spring, or a portion of the housing, and preferably, the support sheet is connected and matched with the housing through the spline.
In this embodiment, the flap is not connected to the intermediate shaft.
In the embodiment, the baffle plate is in sliding connection with the spline groove on the intermediate shaft through the spline on the inner ring of the baffle plate.
In this embodiment, the intermediate shaft is a ring gear, a sun gear or a planet carrier of the planet row, and the outer ring of the intermediate shaft is provided with a spline groove.
In the present embodiment, the actuator push plate is a conventional actuator push plate, and its thrust source includes, but is not limited to, electromagnetic, hydraulic, pneumatic, electric push rod, worm gear and other mechanical force.
In this embodiment, the wedge portion may be formed by machining on a friction plate of the wedge portion, or may be formed by fixing a wedge block on the friction plate by bolts, rivets, welding, or glue.
In this embodiment, the specific type of the stopper includes, but is not limited to, a part of a snap spring, a pin, a bolt head, a nut, or a connecting rod, and due to the existence of the stopper, the distance between the friction plate and the blocking plate under the pushing of the dual plate changes within a certain range.
In the present embodiment, the specific type of the elastic body includes, but is not limited to, a coil spring, a belleville spring, a wave spring, a spring plate, a rubber block, and the like, and preferably, the elastic body is a coil spring.
When the gear is down braked, the driver push disc applies pressure to the dual plate, the dual plate is gradually jointed with the friction plate and pushes the wedge block assembly to axially move towards the support sheet, when the clearance between the dual plate and the friction plate, and the clearance between the separation blade and the support sheet are zero, the driver push disc continuously pushes the dual plate to move towards the support sheet, meanwhile, the friction plate is driven by the middle shaft to continuously rotate, the inclined plane of the wedge part on the friction plate rotates along the edge of the hole on the dual plate from low to high, when the wedge part slides to the edge of the dual plate at high position, the elastic body is compressed, the friction plate can be ensured to continuously rotate, and the middle shaft cannot be instantaneously braked to cause impact; during gear shifting, the force for driving the middle shaft to rotate in the original rotation direction is reduced until the force is cancelled, the rotation speed is gradually reduced under the action of other members in the planetary row, when the rotation speed is reduced to 0 and has a reverse rotation trend, the blocking surface of the wedge-shaped part is jointed with the blocking surface of the dual plate, the dual plate limits the reverse rotation of the friction plate, and therefore the purpose of braking the middle shaft is achieved.
When the gear is shifted and the brake is released, the driver push disc moves in the direction away from the support sheet, the pressure on the dual plate is gradually reduced, the friction plate moves in the direction of the driver push disc under the elastic action of the elastic body, the compressed elastic body is gradually released, when the elastic body is released to a certain amount, the middle shaft rotates in the forward direction under the combined action of other forces and other components of the planet row to drive the wedge block assembly to rotate in the forward direction, when the high position of the inclined plane of the wedge part is connected with the edge of the hole of the dual plate, the elastic body is extruded, the friction plate and the dual plate can rotate relatively until the wedge part and the dual plate are completely separated, and the gear-up purpose is realized.
Under the condition that the electric vehicle is in reverse gear, the friction plate is pushed to the designed limit position by the driver pushing disc, the elastic body can not be compressed any more, when the input power is reversed, the enough pressure or incompressible power medium of the driver enables the driver pushing disc not to be pushed reversely, the friction plate is prevented from rotating relative to the counter plate by the inclined plane, and therefore the brake effect is achieved on the middle shaft, and reverse gear is achieved.
Of course, as shown in fig. 5, the friction plate and the blocking plate may not be connected to the intermediate shaft, and at this time, the friction plate and the blocking plate are in sliding fit with the housing through a spline, and the dual plate is in sliding connection with the intermediate shaft through a spline.
Of course, as shown in fig. 6, the gear shifting mechanism can be provided without an elastic body, a connecting rod or a baffle, and the power of the pushing plate is provided by a piston (the compressible medium is preferably gas), a ball screw or a low-friction worm gear.
In the gear shifting process, the driver push disc pushes and presses the wedge-shaped part towards the direction of the support sheet by proper force, when the wedge-shaped part slides across the edge of the dual sheet hole from low to high, the axial acting force of the wedge-shaped part on the dual sheet pushes the driver push disc to retreat, so that the friction sheet can be normally worn in a sliding way in the gear shifting process, and cannot be instantaneously braked to cause impact.
When the electric vehicle is in reverse gear, the driver push disc is pushed by enough force, so that the reaction force of the friction plate on the dual plate when the friction plate rotates reversely can not push the driver push disc to retreat, and the braking effect is achieved.
In the design, the thrust provided by the push disc is enough to press the elastic body to the designed limit position, the elastic force is only enough to quickly restore the elastic body to the designed initial position, and the distance between the initial position and the limit position is very small, generally within 3mm, so that the thrust of the push disc in the design is very small and is far less than the pressure for pressing the plurality of wet clutch plates in the prior art.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a wedge structure of shifting, is including installing friction disc, dual piece in planetary gear transmission's gearshift, its characterized in that: the friction plate is characterized in that at least one wedge-shaped part is arranged on the side face, attached to the dual plate, of the friction plate, one side of each wedge-shaped part is an inclined face, the other side of each wedge-shaped part is a blocking face of the friction plate, an included angle between each blocking face and the corresponding friction plate ranges from 85 degrees to 90 degrees, a hole part, a groove part or a wedge-shaped convex part is arranged on the side face, attached to the friction plate, of the dual plate, one side of each wedge-shaped convex part is an inclined face, the other side of each wedge-shaped convex part is a limiting face, and the hole part, the groove part or the wedge-shaped convex part is arranged in one-to-one correspondence with the wedge-shaped parts.
2. The wedge shifting structure of claim 1, wherein: when a plurality of wedge parts are arranged, the circumferences of the wedge parts are uniformly distributed on the friction sheet.
3. The wedge shifting structure according to claim 1 or 2, wherein: the size of the hole or groove is larger than the size of the wedge.
4. The wedge shifting structure of claim 1, wherein: the gear shifting mechanism comprises a shell and a driver push disc, a wedge block assembly, a dual plate, a supporting plate and a middle shaft which are arranged in the shell, wherein the wedge block assembly comprises a friction plate, a connecting rod, an elastic body and a separation plate which are sequentially arranged from front to back, the friction plate is in sliding connection with a spline groove on the middle shaft through a spline on an inner ring of the friction plate, the dual plate is positioned on the front side of the friction plate, the driver push disc is positioned on the front side of the dual plate, the periphery of the dual plate is in sliding connection with the spline groove on the shell through the spline, two ends of the elastic body respectively lean against the separation plate, the friction plate or the separation plate and the friction plate are fixedly connected, one end of the connecting rod is fixedly connected with one of the separation plate or the friction plate, the other end of the connecting rod is in sliding connection with the friction plate or the separation plate, a fixed plate is fixedly connected with the connecting rod, a movable plate is arranged on the connecting rod, and stoppers are fixedly arranged on the front side and the rear side of the movable plate, the support sheet is fixedly arranged in the shell and is positioned at the rear side of the baffle sheet.
5. The wedge shifting structure of claim 4, wherein: the baffle is not connected with the intermediate shaft.
6. The wedge shifting structure of claim 4, wherein: the baffle plate is in sliding connection with the spline groove on the intermediate shaft through a spline on an inner ring of the baffle plate.
7. The wedge shifting structure of claim 4, wherein: the intermediate shaft is a gear ring, a sun gear or a planet carrier of the planet row, and the outer ring of the intermediate shaft is provided with a spline groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010175589.4A CN113389896B (en) | 2020-03-13 | 2020-03-13 | Wedge block gear shifting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010175589.4A CN113389896B (en) | 2020-03-13 | 2020-03-13 | Wedge block gear shifting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113389896A true CN113389896A (en) | 2021-09-14 |
| CN113389896B CN113389896B (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010175589.4A Active CN113389896B (en) | 2020-03-13 | 2020-03-13 | Wedge block gear shifting structure |
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| CN (1) | CN113389896B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772940A (en) * | 1971-07-13 | 1973-11-20 | K Ohtsuka | Multiple disc type friction brake for an automotive automatic power transmission |
| CN102777512A (en) * | 2012-07-03 | 2012-11-14 | 洪涛 | Space wedge type centrifugal clutch capable of rapidly acting, dual clutch transmission with clutch and operation method thereof |
| CN103591186A (en) * | 2013-11-12 | 2014-02-19 | 北京科技大学 | Integrated brake used for automatic transmission |
| CN105065487A (en) * | 2015-08-10 | 2015-11-18 | 宁波市龙嘉摩托车有限公司 | Clutch for motorcycle |
| US20150337958A1 (en) * | 2014-05-22 | 2015-11-26 | Mazda Motor Corporation | Brake device of transmission |
| CN110375015A (en) * | 2019-06-11 | 2019-10-25 | 中国北方车辆研究所 | A kind of light-duty brake |
| CN209638286U (en) * | 2019-01-08 | 2019-11-15 | 上海宇意机械有限公司 | Transport mine equipment wet type row parking brake device |
-
2020
- 2020-03-13 CN CN202010175589.4A patent/CN113389896B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772940A (en) * | 1971-07-13 | 1973-11-20 | K Ohtsuka | Multiple disc type friction brake for an automotive automatic power transmission |
| CN102777512A (en) * | 2012-07-03 | 2012-11-14 | 洪涛 | Space wedge type centrifugal clutch capable of rapidly acting, dual clutch transmission with clutch and operation method thereof |
| CN103591186A (en) * | 2013-11-12 | 2014-02-19 | 北京科技大学 | Integrated brake used for automatic transmission |
| US20150337958A1 (en) * | 2014-05-22 | 2015-11-26 | Mazda Motor Corporation | Brake device of transmission |
| CN105065487A (en) * | 2015-08-10 | 2015-11-18 | 宁波市龙嘉摩托车有限公司 | Clutch for motorcycle |
| CN209638286U (en) * | 2019-01-08 | 2019-11-15 | 上海宇意机械有限公司 | Transport mine equipment wet type row parking brake device |
| CN110375015A (en) * | 2019-06-11 | 2019-10-25 | 中国北方车辆研究所 | A kind of light-duty brake |
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| Publication number | Publication date |
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| CN113389896B (en) | 2022-06-21 |
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Address after: Room 1510, 15th floor, Zhongqing scientific research center, No.10, Keji East Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province, 350108 Patentee after: Fujian Zhongqing Transmission Technology Co.,Ltd. Address before: Room 1510, 15th floor, Zhongqing scientific research center, No.10, Keji East Road, Shangjie Town, Minhou County, Fuzhou City, Fujian Province, 350108 Patentee before: FUZHOU RUIZHI NEW ENERGY TECHNOLOGY Co.,Ltd. |
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