CN105667480B - A kind of hydraulic brake booster for vehicle - Google Patents
A kind of hydraulic brake booster for vehicle Download PDFInfo
- Publication number
- CN105667480B CN105667480B CN201610085946.1A CN201610085946A CN105667480B CN 105667480 B CN105667480 B CN 105667480B CN 201610085946 A CN201610085946 A CN 201610085946A CN 105667480 B CN105667480 B CN 105667480B
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- Prior art keywords
- piston rod
- fairlead
- hole
- supercharging piston
- supercharging
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Arrangements (AREA)
Abstract
A kind of hydraulic brake booster for vehicle, belong to hydraulic vehicle brake part and system regions.Due to using the connection and blocking between the first fairlead and the cooperation control high pressure chest of the second fairlead and brake fluid input port, eliminating unloading spring（Or compression spring）, hidden danger that the function of increasing pressure caused by unloading spring failure eliminated during use of essence disappears improves safety and reliability.
Description
Technical field
The present invention relates to a kind of hydraulic brake booster for vehicle brake pressure distribution system, belong to hydraulic vehicle brake part
And system regions.
Background technology
In current hydraulic vehicle brake system both domestic and external, widely used brake booster, such as vacuum booster, Pneumatic auxiliary
Power device etc., these brake boosters consume power during automobile engine work, and in automobile brake, sending brake force can subtract
The brake pedal force of light driver, effect is preferable, but it is complicated, volume is big, maintenance difficult, just lose and help after engine misses
Power function.
Existing hydraulic brake boosting device（Or booster）, using supercharging piston rod so that delivery outlet exports higher pressure
Power, avoid the shortcomings that other boosters rely on automobile engine power source；But in its work, pressurization control is with unloading spring
The unloading valve controlled（Or the guiding valve of compression spring control）Close the passage of low pressure chamber and high pressure chest；In use, one
Denier spring failure, function of increasing pressure just can not realize there is quite big hidden danger.Unloading valve（Or guiding valve）Using unloading spring（Or
Compression spring）Axial restoring force promote sealing surface to be close to so as to reach sealing purpose, in unloading valve（Or guiding valve）Initial sealing
When, unloading spring（Or compression spring）Compression is smaller, and axial restoring force is also smaller, and sealing effectiveness is poor.And unloading spring（Or pressure
Power spring）In opposite direction with returning spring power, both, which are superimposed, make it that supercharging piston rod stressing conditions are complicated, keeps co-ordination
It is more difficult.In addition, being guarantee good seal, sealing surface roughness requirements are higher（Or additional encryption seal in addition）, to roughness
Raising need to increase larger cost, and process inconvenience；And although the mode of additional encryption seal can reduce cost, it is bonded in
The sealing ring of off-load valve body surface also has the hidden danger that comes off in being repeatedly used for a long, and has certain potential safety hazard.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, and to provide a kind of hydraulic brake boosting device, eliminates off-load
Spring and unloading valve, eliminate hidden danger.A kind of hydraulic brake booster for vehicle for distributing pressure is further provided, it is special
Select be can not only by brake main pump export low pressure brake fluid hydraulic fluid be pressurized, will can also increase stressed high-pressure brake liquid and
Low pressure brake fluid is transmitted separately to high-pressure brake wheel cylinder and wheel pressure brake cylinder, so as to realize gradual braking.
To solve the failure potential problem of unloading spring, the present invention provides a kind of hydraulic brake boosting device, including：Supercharging is lived
Stopper rod, housing, back-moving spring and hole sealing ring, the supercharging piston rod are provided with big end and small end, end diameter D2,
Outside diameter is D1And D1>D2；It is defeated that the housing is disposed with brake fluid input port, low pressure chamber, high pressure chest, high-pressure brake liquid
Outlet, be sequentially communicated between the brake fluid input port, low pressure chamber, high pressure chest, high-pressure brake liquid delivery outlet, the low pressure chamber and
High pressure chest is collectively referred to as inner chamber；The supercharging piston rod slides axially in housing cavity, the big end of supercharging piston rod and low pressure chamber
It is engaged, piston rod small-end is engaged with high pressure chest；Hole sealing ring is arranged on the big end of supercharging piston rod, sealing type pressure piston
Bar and low pressure chamber internal perisporium, back-moving spring are arranged between supercharging piston rod and housing cavity, and supercharging piston rod is in back-moving spring
Elastic force effect under be resisted against on housing low pressure intracavitary end wall；It is characterized in that：Supercharging piston rod is provided with to be connected with high pressure chest
First through hole, the first through hole communicates with being arranged on the first fairlead of supercharging piston rod lateral circle surface, housing cavity inner circumferential
The second fairlead being arranged on wall, housing or supercharging piston rod are provided with the second through hole being connected with brake fluid input port,
Second through hole communicates with the second fairlead；Under free state, first fairlead is in contact and connected with the second fairlead
Logical high pressure chest and brake fluid input port, it is described after supercharging piston rod is advanced by low pressure chamber and the pressure differential of high pressure chest to high pressure chest
First fairlead staggers with the second fairlead, and housing cavity internal perisporium covers the first fairlead, and cutoff high chamber and brake fluid are defeated
The passage of entrance.
Using the hydraulic brake boosting device of above-mentioned technical proposal, due to the cooperation using the first fairlead and the second fairlead
The connection and blocking between high pressure chest and brake fluid input port are controlled, eliminates unloading spring（Or compression spring）, essence
The hidden danger that the function of increasing pressure caused by unloading spring failure during use disappears is eliminated, improves security and reliable
Property；Eliminate unloading spring（Or compression spring）Afterwards, supercharging piston rod stress is simpler, and control is more convenient；In addition, first
By the clearance seal between supercharging piston rod lateral circle surface and housing internal perisporium between fairlead and the second fairlead, relatively axially connect
The sealing means effect of contacting surface is more preferable；The difficulty of processing of sealing surface is relatively low simultaneously, without other increase sealing ring；In structure and
Greatly simplified on processing request, reduce cost.
The tradition of sealing between the small end lateral circle surface and high pressure chest internal perisporium of the supercharging piston rod of hydraulic brake boosting device
Mode is to use axle sealing ring, and supercharging piston rod is after lateral circle surface sets the first fairlead, to avoid the first fairlead to axle
Ring wear is caused with the friction of sealing ring, supercharging piston rod must be lengthened, it will make the overall chi of hydraulic brake boosting device
Very little increase, the inconvenience of installation is also increased while manufacturing cost is added.To solve this problem, hydraulic braking of the present invention increases
Depressor has carried out following improvement：Clearance seal is used between the small end lateral circle surface and high pressure chest internal perisporium of supercharging piston rod.Use
The hydraulic brake boosting device of clearance seal reduces an axle sealing ring, is further reduced while overall dimensions are not increased
The setup cost of sealing ring.
After clearance seal being used between the small end lateral circle surface and high pressure chest internal perisporium of supercharging piston rod, supercharging piston rod movement
Resistance reduce, supercharging the time started reduced, to solve this problem, hydraulic brake boosting device of the present invention has been carried out further
Improve：Throttle orifice is set between brake fluid input port, low pressure chamber.Control to being pressurized the time started can be realized by throttle orifice
System.
The invention has the advantages that：
1st, because brake main pump output pressure needed for hydraulic brake boosting device is relatively low, thus the braking of human pilot pressure is stepped on
Plate power is also smaller, can cancel or the additional brake booster of the existing vehicle of partial cancellation, simplifies brakes；
2nd, it is applied on electric automobile, hydraulic brake boosting device advantage is more obvious, and the engine work of orthodox car must
Tail gas is so produced so that traditional booster utilizes, but tail gas is not produced during electric automobile operation, traditional booster is applied to electricity
Electrical automobile must increase air pump, not only increase the acquisition cost of system, while also need to expend valuable electric power；Once power supply
Failure or air pump break down, and just can not realize function.The cost for purchasing air pump can be not only saved using the present invention, may be used also
To simplify brakes, braking safe and reliable, without additionaling power source is realized.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of hydraulic brake boosting device of the present invention.
Fig. 2 is hydraulic brake boosting device of the present invention according to improved second of the embodiment of the first embodiment
Structural representation.
Fig. 3 is using fundamental diagram during Fig. 1 or Fig. 2 hydraulic brake boostings device structure vehicle braking control system.
Embodiment
The present invention is specifically described below by embodiment, it is necessary to it is pointed out here that be that the present embodiment is served only for
The present invention is further described, it is impossible to be interpreted as limiting the scope of the invention, art personnel can root
Some nonessential modifications and adaptations are made according to the invention described above content.
Embodiment 1
Compares figure 1 elaborates to the first embodiment of hydraulic brake boosting device of the present invention.
Hydraulic brake boosting device includes housing 1, supercharging piston rod 2, back-moving spring 3 and hole sealing ring 4, the supercharging
Piston rod 2 is provided with big end and small end, end diameter D2, outside diameter D1And D1>D2；The housing 1 is by high pressure cavity shell
11 and low pressure cavity shell 12 form, both are connected through a screw thread.High-pressure brake liquid delivery outlet O is set on high pressure cavity shell 111With
High pressure chest K, brake fluid input port O is set on low pressure cavity shell 122With low pressure chamber G, after housing 1 assembles, the brake fluid input
Mouth O2, low pressure chamber G, high pressure chest K, high-pressure brake liquid delivery outlet O1Between be sequentially communicated;The low pressure chamber G and high pressure chest K are collectively referred to as
Inner chamber；The supercharging piston rod 2 is slid axially in housing cavity, and the end greatly of supercharging piston rod 2 is engaged with low pressure chamber G,
The small end of piston rod 2 is engaged with high pressure chest K；Hole sealing ring 4 is arranged on supercharging piston rod 2 greatly on end, sealing type pressure piston rod 2
With low pressure chamber G internal perisporiums；Back-moving spring 3 is sleeved on the small end of supercharging piston rod 2, and in low pressure chamber G, the bar of charged piston 2 exists
It is resisted against under the elastic force effect of back-moving spring 3 in the inner end wall of low pressure cavity shell 12.
First through hole is the hole d that the small end of supercharging piston rod 2 is axially drilled with, and the first fairlead is the top end diameter of supercharging piston rod 2
To the hole c being drilled with.
Second through hole is held greatly the 3rd fairlead a groups that the hole e being axially drilled with and small end be radially drilled with by supercharging piston rod 2
Into the form of the second fairlead is covering the first fairlead c and the 3rd fairlead a annular groove b.
Annular groove b edge flushes with the first fairlead c and the 3rd fairlead a respectively, under free state, brake fluid input port
O2, hole e, hole a, annular groove b, hole c, hole d, high pressure chest K connection；By brake fluid input port O2Input brake liquid, brake fluid enter low pressure
Chamber G and high pressure chest K, it is identical with the pressure of small end that brake fluid acts on the end greatly of supercharging piston rod 2, in the opposite direction, because big end is greatly
In the sectional area of small end, brake fluid acts on the pressure held greatly and is higher than small end, in the presence of pressure differential, supercharging piston rod 2 to
High pressure chest K advances, and hole c staggers with annular groove b, and high pressure chest K internal perisporiums cover the first fairlead, and cutoff high chamber K and brake fluid are defeated
Entrance O2Passage.
Supercharging piston rod 2 continues to move along, and compression high pressure chest K brake fluid, makes its pressure rise, is pressurized multiple：I=
D1 2/D2 2。
Clearance seal is used between the small end lateral circle surface and high pressure chest K internal perisporiums of supercharging piston rod 2.The specific number in its gap
Value is relevant with supercharging piston rod 2 and high pressure chest K specific size, and those skilled in the art can be according to the design standard of clearance seal
Then give calculating and determine.
Sealing can also be used between the small end lateral circle surface and high pressure chest K internal perisporiums of supercharging piston rod 2 in the present embodiment
Circle sealing, Fig. 1 lower left side are close using axle sealing ring between the small end lateral circle surface of supercharging piston rod 2 and high pressure chest K internal perisporiums
The schematic diagram of envelope, with sealing sealing type pressure piston rod small-end lateral circle surface and high pressure chest internal perisporium it is the used of the art using axle
Use mode.
To improve controllability, throttle orifice is set, and the form of the throttle orifice is between brake fluid input port, low pressure chamber：
The end greatly of supercharging piston rod 2 radially process with the hole m that holds the hole e being axially drilled with to communicate greatly, it is big in housing and supercharging piston rod 2
Terminate and sealing ring 5 is set in contacting surface.Sealing ring 5 is bonded on housing, before supercharging piston rod 2 moves, the seal casinghousing of sealing ring 5
With supercharging piston rod 2, because hole m throttling action, brake fluid is most of to flow into high pressure chest K by hole e, and small part flows into low pressure chamber
G, after low pressure chamber G topping ups, supercharging piston rod 2 starts to move, and its end disengages with sealing ring 5, and brake fluid normally flows into low
Press chamber G.Hole m presence, the effect for delaying supercharging piston rod 2 to move is served, so as to realize the control to being pressurized the time started.
To prevent brake fluid from overflowing, axle sealing ring is provided between the second fairlead and housing installation seam.
The cavity that end, small end periphery and the internal chamber wall of housing 1 surround greatly of supercharging piston rod 2 is provided with air vent.Deflate
It is smooth that the setting in hole make it that supercharging piston rod 2 moves.
Embodiment 2
Fig. 2 is the another embodiment of hydraulic brake boosting device of the present invention.
The first through hole of present embodiment and the form of the first fairlead are identical with first two embodiment set-up mode.The
The form of two fairleads is the annular groove b corresponding with the first fairlead, and the second through hole is by the hole f and ring that are axially drilled with along housing 1
The hole h that the corresponding radial direction in groove b positions is drilled with, brake fluid input port O2Communicated with hole h.
In Fig. 2, housing 1 includes end cap 13, and end cap 13 sets low pressure brake fluid input hole O2, input hole O2With the second through hole
Communicate.
The form of throttle orifice is the hole p, hole p and low pressure brake fluid input hole O axially processed along end cap 132Communicate.Using
This mode, throttle orifice can play throttling action all the time, be easy to the whole control of supercharging.
For ease of processing, housing 1 is divided into middle casing 14 and the two parts of bonnet 15, middle case except the other parts of end cap 13
Low pressure chamber G and high pressure chest K is set on body 14, high-pressure brake liquid delivery outlet O is set on bonnet 151, middle casing 14 and bonnet 15
Link together, high pressure chest K and O1Communicate.In Fig. 2, the hole being drilled with housing uses steel ball sealing.End cap 13, housing 14,
Sealed between bonnet 15 using threaded connection, seam crossing using sealing ring.
It can also equally be used between the small end lateral circle surface and high pressure chest internal perisporium of supercharging piston rod in the present embodiment close
Seal seals, and Fig. 2 lower left side is close using axle sealing ring between the small end lateral circle surface of supercharging piston rod and high pressure chest internal perisporium
The schematic diagram of envelope.
Other are no longer repeated one by one with embodiment identical feature before and conventional implementation.
Embodiment 3
Fig. 3 is using fundamental diagram during embodiment of above structure vehicle braking control system.
Booster and tee pipe coupling（Illustrate the part surrounded in Fig. 3 with double dot dash line）Form brake pressure distribution system
System.Low pressure brake fluid is inputted by Z mouths, is divided into two-way, a route O ' through tee pipe coupling2Mouth exports low pressure brake fluid to low pressure car
Brake cylinder is taken turns, another way is through booster by O1Mouth exports high-pressure brake liquid to high-pressure brake wheel cylinder.
Braking method shown in the present embodiment is also when existing hydraulic brake boosting device needs to distribute height hydraulic brake fluid
General embodiments, it is characterized in tee pipe coupling or like parts must being used to realize partial pressure.
Claims (7)
1. a kind of hydraulic brake boosting device, including：Supercharging piston rod, housing, back-moving spring and hole sealing ring, the supercharging
Piston rod is provided with big end and small end, end diameter D2, outside diameter D1And D1>D2；The housing is disposed with braking
Liquid input port, low pressure chamber, high pressure chest, high-pressure brake liquid delivery outlet, the brake fluid input port, low pressure chamber, high pressure chest, high compacting
It is sequentially communicated between hydrodynamic delivery outlet, the low pressure chamber and high pressure chest are collectively referred to as inner chamber；The supercharging piston rod slides axially installation
In housing cavity, the big end of supercharging piston rod is engaged with low pressure chamber, and supercharging piston rod small end is engaged with high pressure chest；Hole is with close
Seal is arranged on the big end of supercharging piston rod, and sealing type pressure piston rod and low pressure chamber internal perisporium, back-moving spring are arranged on supercharging and lived
Between stopper rod and housing cavity, supercharging piston rod is resisted against on housing low pressure intracavitary end wall under the elastic force effect of back-moving spring；
It is characterized in that：Supercharging piston rod is provided with the first through hole connected with high pressure chest, and the first through hole is lived with being arranged on supercharging
First fairlead of stopper rod lateral circle surface is communicated, and the second fairlead, housing or supercharging piston rod are provided with housing cavity internal perisporium
The second through hole being connected with brake fluid input port is provided with, second through hole communicates with the second fairlead；Under free state,
First fairlead is in contact with the second fairlead and connects high pressure chest and brake fluid input port, and supercharging piston rod is by low pressure chamber
After being advanced with the pressure differential of high pressure chest to high pressure chest, first fairlead staggers with the second fairlead, housing cavity internal perisporium
Cover the first fairlead, cutoff high chamber and the passage of brake fluid input port；First through hole is supercharging piston rod（2）Small end axial direction
The hole being drilled with（d）, the first fairlead is supercharging piston rod（2）The hole that small end is radially drilled with（c）.
2. hydraulic brake boosting device according to claim 1, it is characterised in that：Supercharging piston rod small end lateral circle surface and high pressure
Clearance seal is used between intracavitary perisporium.
3. hydraulic brake boosting device according to claim 1, it is characterised in that：Supercharging piston rod small end lateral circle surface and high pressure
Sealed between intracavitary perisporium using sealing ring.
4. the hydraulic brake boosting device according to any one of claims 1 to 3, it is characterised in that：Second through hole is lived by supercharging
Stopper rod（2）The hole being axially drilled with is held greatly（e）The 3rd fairlead being radially drilled with small end（a）Composition, the form of the second fairlead
To cover the first fairlead（c）With the 3rd fairlead（a）Annular groove（b）.
5. the hydraulic brake boosting device according to any one of claims 1 to 3, it is characterised in that：Second fairlead and housing
Axle sealing ring is provided between installation seam.
6. the hydraulic brake boosting device according to any one of claims 1 to 3, it is characterised in that：Supercharging piston rod（2）Greatly
End, small end periphery and housing（1）The cavity that internal chamber wall surrounds is provided with air vent.
7. the hydraulic brake boosting device according to any one of claims 1 to 3, it is characterised in that：Supercharging piston rod（2）Small end
Clearance seal is used between lateral circle surface and high pressure chest internal perisporium, throttle orifice is set between brake fluid input port, low pressure chamber；The section
The form of discharge orifice is：In supercharging piston rod（2）Big end radially processes and holds the hole being axially drilled with greatly（e）The hole communicated（m）,
Housing and supercharging piston rod（2）Sealing ring is set in big termination contacting surface（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610085946.1A CN105667480B (en) | 2014-08-09 | 2014-08-09 | A kind of hydraulic brake booster for vehicle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610085946.1A CN105667480B (en) | 2014-08-09 | 2014-08-09 | A kind of hydraulic brake booster for vehicle |
| CN201410388652.7A CN104118412B (en) | 2014-08-09 | 2014-08-09 | A kind of hydraulic brake booster for vehicle and brake pressure distribution system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410388652.7A Division CN104118412B (en) | 2014-08-09 | 2014-08-09 | A kind of hydraulic brake booster for vehicle and brake pressure distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105667480A CN105667480A (en) | 2016-06-15 |
| CN105667480B true CN105667480B (en) | 2017-12-29 |
Family
ID=56304444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610085946.1A Active CN105667480B (en) | 2014-08-09 | 2014-08-09 | A kind of hydraulic brake booster for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105667480B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2275977Y (en) * | 1996-10-25 | 1998-03-11 | 成都市双流县东升液压附件厂 | Hydraulic brake booster for vehicle |
| JP2000318594A (en) * | 1999-05-14 | 2000-11-21 | Bosch Braking Systems Co Ltd | Hydraulic booster |
| US6196641B1 (en) * | 1997-10-30 | 2001-03-06 | Bosch Braking Systems Co., Ltd. | Fluid pressure boosting device and brake pressure boosting system employing the device |
| CN2526221Y (en) * | 2001-03-16 | 2002-12-18 | 汪沛华 | Hydraulic pressure sensing pressurizer |
| CN101402358A (en) * | 2008-11-12 | 2009-04-08 | 李光明 | Hydraulic reinforcement brake controller of automobile |
-
2014
- 2014-08-09 CN CN201610085946.1A patent/CN105667480B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2275977Y (en) * | 1996-10-25 | 1998-03-11 | 成都市双流县东升液压附件厂 | Hydraulic brake booster for vehicle |
| US6196641B1 (en) * | 1997-10-30 | 2001-03-06 | Bosch Braking Systems Co., Ltd. | Fluid pressure boosting device and brake pressure boosting system employing the device |
| JP2000318594A (en) * | 1999-05-14 | 2000-11-21 | Bosch Braking Systems Co Ltd | Hydraulic booster |
| CN2526221Y (en) * | 2001-03-16 | 2002-12-18 | 汪沛华 | Hydraulic pressure sensing pressurizer |
| CN101402358A (en) * | 2008-11-12 | 2009-04-08 | 李光明 | Hydraulic reinforcement brake controller of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105667480A (en) | 2016-06-15 |
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Address after: Hefei road Laoshan District Qingdao city Shandong province 266101 No. 857 No. 13 Building 1 unit garden village 504 Applicant after: Zhang Shijun Address before: Miao road Laoshan District 266061 Shandong city of Qingdao province 6-8 Applicant before: Zhang Shijun |
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Effective date of registration: 20181211 Address after: 615500 Xiahe Wanzi Formation, Fenghuang Village, Dezhou Town, Dechang County, Sichuan Province, Liangshan Yi Autonomous Prefecture Patentee after: Yang Yupeng Address before: 266101 Unit 504, Building 13, Beicun Xinyuan, 857 Hefei Road, Laoshan District, Qingdao City, Shandong Province Patentee before: Zhang Shijun |
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Effective date of registration: 20191121 Address after: 215434 Jiangsu city of Suzhou province Taicang City Bridge Town Village Patentee after: TAICANG RONGCHI MOTOR CO., LTD. Address before: 615500 Xiahe Wanzi Formation, Fenghuang Village, Dezhou Town, Dechang County, Sichuan Province, Liangshan Yi Autonomous Prefecture Patentee before: Yang Yupeng |
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