CN207644369U - Auxiliary braking system and vehicle - Google Patents
Auxiliary braking system and vehicle Download PDFInfo
- Publication number
- CN207644369U CN207644369U CN201721125102.1U CN201721125102U CN207644369U CN 207644369 U CN207644369 U CN 207644369U CN 201721125102 U CN201721125102 U CN 201721125102U CN 207644369 U CN207644369 U CN 207644369U
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- brake pedal
- vacuum
- vacuum source
- executive item
- auxiliary braking
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Abstract
This disclosure relates to a kind of auxiliary braking system and vehicle, auxiliary braking system includes pneumatic executive item, pneumatic executive item has the fixed part for being fixed on vehicle body and the driving portion for driving brake pedal, pneumatic executive item by pipeline with the vacuum source of vehicle braking vacuum boost system for being connected to with operating position and off-position, in operating position, the vacuum degree of vacuum source reduces, driving portion connects with the activation point transmission on brake pedal and drives brake pedal towards the movement of brake direction, in off-position, vacuum source works normally, driving portion and activation point transmission are freed to allow brake pedal to work normally.Therefore, it is possible to when the vacuum source of braking vacuum boost system fails so that pneumatic executive item enters operating position, to carry out auxiliary braking to brake pedal.It is safe to carry out auxiliary braking to vehicle.
Description
Technical field
This disclosure relates to the brake field of vehicle, and in particular, to a kind of auxiliary braking system and use the auxiliary braking
The vehicle of system.
Background technology
Conventional truck manipulates brake pedal for the ease of driver, is usually provided with vacuum boost system, utilizes vacuum pump
Pull of vacuum can assist driver manipulate brake pedal.However, when the vacuum failure of vacuum boost system or component damage
Bad when, can cause force aid system that cannot play a role, and can only be braked completely by manpower at this time, and braking distance is long, dangerous pole
Greatly.
Utility model content
Purpose of this disclosure is to provide the vehicles of a kind of auxiliary braking system and the use system, true can be used in braking
Auxiliary braking is carried out to vehicle when the vacuum source failure of empty force aid system.
To achieve the goals above, the disclosure provides a kind of auxiliary braking system, including pneumatic executive item, described pneumatically to hold
There is row part the fixed part for being fixed on vehicle body and the driving portion for driving brake pedal, the pneumatic executive item to be used for
It is connected to the vacuum source of vehicle braking vacuum boost system by pipeline with operating position and off-position, described
The vacuum degree of operating position, the vacuum source reduces, and the driving portion connects with the activation point transmission on the brake pedal
And drive the brake pedal towards the movement of brake direction, in the off-position, the vacuum source normal work, the drive
Dynamic portion and activation point transmission are freed to allow the brake pedal to work normally.
Optionally, the pneumatic executive item includes cylinder barrel, the piston in the cylinder barrel and the work being connected on the piston
Stopper rod, the cylinder barrel are formed as the fixed part, and the piston rod is formed as the driving portion, described in the operating position
Piston rod is stretched out from the cylinder barrel to drive the brake pedal.
Optionally, be provided with elastic component in the rodless cavity or rod chamber of the pneumatic executive item, and the rodless cavity and
One of described rod chamber is connected to the vacuum source, another one and atmosphere, in the operating position, with the vacuum
The indoor pressure reduction of chamber of source connection, so that the elastic component drives the piston rod to stretch out to drive the braking to step on
Plate, in the off-position, the pressure for the chamber being connected to the vacuum source makes the elastic component spring energy storage, and institute
Piston rod is stated to retract to free with brake pedal transmission.
Optionally, the elastic component is the compressed spring being arranged in the rodless cavity, the rodless cavity and the vacuum
Source is connected to, the rod chamber and the atmosphere.
Optionally, check valve is provided between the pneumatic executive item and the vacuum source, the check valve allows gas
Flow to the vacuum source.
Optionally, arc-shaped seat is provided at the activation point, the end of the piston rod is formed as accommodating with can deviating from
Arcuate structure in the arc-shaped seat.
Optionally, there is the brake pedal pedal panel and hinge joint, the activation point to be located at the pedal panel
Between the hinge joint or the hinge joint is between the activation point and the pedal panel.
The disclosure also provides a kind of vehicle, including brake pedal and vehicle braking vacuum boost system, the vehicle system
It includes vacuum source to employ vacuum boost system, further includes the auxiliary braking system that the disclosure provides.
Through the above technical solutions, can be when the vacuum source of braking vacuum boost system fails so that pneumatic to execute
Part enters operating position, to carry out auxiliary braking to brake pedal.It is safe to carry out auxiliary braking to vehicle.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is the structure principle chart for the auxiliary braking system that disclosure first embodiment provides, and pneumatic executive item is in
Off-position is simultaneously contacted with brake pedal；
Fig. 2 is the part-structure schematic diagram for the auxiliary braking system that disclosure first embodiment provides, pneumatic executive item
It is detached in off-position and with brake pedal；
Fig. 3 is the structure principle chart for the auxiliary braking system that disclosure first embodiment provides, and pneumatic executive item is in
Operating position；
Fig. 4 is the structure principle chart for the auxiliary braking system that disclosure second embodiment provides, and pneumatic executive item is in
Off-position is simultaneously contacted with brake pedal；
Fig. 5 is the structure principle chart for the auxiliary braking system that disclosure third embodiment provides, and pneumatic executive item is in
Off-position is simultaneously contacted with brake pedal.
Specific implementation mode
The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
It is defined on the basis of the page of respective drawings." inside and outside " refers to the inner and outer of corresponding component profile.
As shown in Figures 1 to 5, the disclosure provides a kind of auxiliary braking system, and uses the vehicle of the auxiliary braking system,
Auxiliary braking can be carried out to vehicle when needed, safety is improved.Wherein Fig. 1 to Fig. 3 is auxiliary in first embodiment
It is the auxiliary braking system in second embodiment to help braking system, Fig. 4, and Fig. 5 is the auxiliary braking system in third embodiment
System.Wherein, as shown in Figures 1 to 4, first embodiment and second embodiment are two kinds of embodiments based on switch 2, the
Three embodiments are the embodiments of the vacuum source (vacuum pump) based on vehicle braking vacuum boost system.It first mainly retouches below
The difference of first embodiment and second embodiment and third embodiment and first embodiment is stated, wherein for
Succinct, something in common no longer excessively repeats.
As shown in Figures 1 to 4, in the first and second embodiments, auxiliary force aid system includes pneumatic executive item 1 and control
Make the switch 2 of the pneumatic executive item 1, pneumatic executive item 1 has fixed part 11 for being fixed on vehicle body and for driving system
The driving portion 12 of dynamic pedal 3, by Operation switch 2, pneumatic executive item 1 has operating position and off-position, in working position
It sets, as shown in figure 3, driving portion 12 connects with the activation point A transmissions on brake pedal 3 to drive brake pedal 3 towards brake
Direction moves, and in off-position, as depicted in figs. 1 and 2, the driving portion 12 of pneumatic executive item 1 and activation point A transmissions are freed
To allow brake pedal 3 to work normally.The normal work of brake pedal 3 herein refers to the normal brake of driver.Specifically
Ground contacts for the brake pedal 3 that driving portion 12 only and is not depressed in Fig. 1, braking can be allowed to step in fig. 2 in this way
Plate 3 is freely depressed, the normal work without influencing brake pedal 3.
Therefore, by adding the auxiliary force aid system on vehicle, can make to bring about the desired sensation by Operation switch 2 when needed
Dynamic executive item 1 enters operating position, to carry out auxiliary braking to brake pedal 3.To when needed, for example, vehicle vacuum
Force aid system fails or needs in abrupt slope parking, and auxiliary braking is carried out to vehicle, safe.
In the present embodiment, as shown in Figures 1 to 4, pneumatic executive item 1 uses cylinder form, includes specifically cylinder barrel
13, the piston 14 in the cylinder barrel 13 and the piston rod 15 being connected on the piston, cylinder barrel 13 is interior to be divided by piston 14 to there is bar
Chamber and rodless cavity, wherein cylinder barrel 13 is formed as fixed part 11, you can be connected on vehicle body by mounting bracket etc., and piston
Bar 15 is formed as driving portion 12, i.e., drives brake pedal 3 by the expanding-contracting action of piston rod 15.I.e. in operating position, piston
Bar 15 is stretched out from cylinder barrel 13 to drive brake pedal 3, and in off-position, and piston rod 15 is retracted simultaneously relative to operating position
It remains stationary as that brake pedal 3 is allowed freely to act.In other possible embodiments, pneumatic executive item can also be pneumatic
Motor etc. rotates executive item.
Further, there are many embodiments that can realize 1 above-mentioned two operating position of pneumatic executive item, extremely such as Fig. 1
Shown in Fig. 4, in the present embodiment, pneumatic executive item 1 is that pressure source 4 (positive pressure source or negative pressure source) is connected to obtain by switch 2
It obtains power and is specifically provided with elastic component 16, and rodless cavity and rod chamber in the rodless cavity or rod chamber of pneumatic executive item 1
One of be connected to pressure source 4 by switch 2, another one and atmosphere, switch 2 can control pneumatic executive item 1 with pressure
Power source 4 or atmosphere, in operating position, switch 2 controls pneumatic executive item and atmosphere, so that rod chamber and rodless cavity
Interior air pressure is identical, and elastic component drives piston rod 15 to stretch out to drive brake pedal 3, and in off-position, the control of switch 2 is pneumatic
Executive item is connected to pressure source 4 so that in rod chamber and rodless cavity pressure the greater increase and drive piston rod retract with
The transmission of brake pedal 3 is freed and drives 16 spring energy storage of elastic component.I.e. in the present embodiment, when off-position,
Elastic component 16 can be made to be in energy accumulating state by the pressure of pressure source 4 and piston rod 15 is contracted relative to operating position
It returns, in this way at operating position, after having cut off the pressure of pressure source 4, elastic component 16 is enabled to discharge elasticity, to drive
Piston rod 15 is stretched out to drive brake pedal 3.
More specifically, as a kind of embodiment, as shown in Figures 1 to 4, elastic component 16 is the compression being arranged in rodless cavity
Spring, pressure source 4 are and the vacuum source 41 that is connected to rodless cavity by switch 2, i.e. negative pressure source, and rod chamber and atmosphere.
In this way, in operating position, as shown in figure 3, since switch 2 controls rodless cavity and atmosphere so that rodless cavity and rod chamber
Air pressure is identical, and the compressed spring elasticity in rodless cavity is restored at this time, to push piston 15 to be stretched out from cylinder barrel 13, to drive system
Dynamic pedal 3 is braked.In the other embodiment of present embodiment, it is extension spring that elastic component 16, which can also be arranged, at this time
Extension spring is arranged in rod chamber, or the compressed spring being still provided in rodless cavity, and more by pressure source 4
It is changed to positive pressure source and is connected to rod chamber, and rodless cavity and atmosphere, in addition, the type of pressure source, two chambers
The embodiment that mode of communicating, the type of elastic component and installation position can also be combined with each other with various deformation, the disclosure pair
Such deformation is not limited.
For lifting system stability, optionally, check valve 5 is provided between switch 2 and vacuum source 41, check valve 5 is permitted
Perhaps gas flow vacuum source 41.
In addition, as shown in figure 3, in order to adapt to the rotation displacement of brake pedal 3, piston rod 15 can be hinged on piston 14
On, and the bar diameter that the relative aperture piston rod of the outlet of cylinder barrel 14 is arranged is slightly larger, so as to adapt to piston rod 15 more by a small margin
Rotation cylinder barrel 14 can also be fixed on vehicle body without using mounting bracket and in other embodiments, and make cylinder barrel
14 are hinged on vehicle body, and such cylinder barrel 14 can rotate when piston rod 15 stretches out, to adapt to the rotation position of brake pedal 3
It moves.
In order to realize that driving portion 12 is connected with the transmission of brake pedal 3 and transmission is freed, optionally, institute as shown in Figure 1 to Figure 4
Show, arc-shaped seat 33 is provided at activation point A, and the end of piston rod 15 is formed as the arc being contained in can deviating from arc-shaped seat 33
Shape structure.I.e. arc-shaped seat 33 is open towards piston rod 15, so that the end of piston rod 15 passes in and out arc-shaped seat two positions
33.Wherein it should be noted that arc-shaped seat described herein 33 may include the crescent moon that single section as shown in the figure is arc
Type seat can also include the ball-and-socket type seat that multiple sections are arc, and the end of piston rod 15 can corresponding formation crescent moon at this time
Arc or bulb arc.To adapt in operating position, relative rotation that both piston rod 15, which pushes when brake pedal 3, occurs.
In the first and second embodiments, as shown in Figure 1 to Figure 3, switch 2 can be solenoid valve, or such as Fig. 4 institutes
Show, is hand-operated valve.Wherein when for solenoid valve, the installation position of switch 2 is freer, and can be indoor arbitrarily in driving
Button is provided on position, such as instrument board to be operated to switch 2.And when for hand-operated valve, it needs to exist the setting of switch 2
Instrument board etc. in order to driver operation, such as is provided with rotary valve close to the position of driver.Wherein switch 2 can be two three
Logical reversal valve, wherein three gas ports can be separately connected pneumatic executive item 1, pressure source 4 and air, to pass through the movement of spool
It is connected to switch one of pneumatic executive item 1 and pressure source 4 or air.In addition connect open to atmosphere air inlet and can be designed as loudspeaker
Shape mouth so that the air-flow of access switch 2 is more stablized.
In addition when switch 2 is solenoid valve, as shown in Figure 1, the auxiliary braking system that the disclosure provides can also include inspection
Survey device 6, the vacuum degree for detecting vehicle braking vacuum boost system, such as vacuum sensor, controller 7, such as
The car running computer of vehicle can be electrically connected by modes such as CAN bus respectively with the vacuum-ness detecting device 6 and switch 2, with
When the vacuum degree detected when detection device 6 is less than threshold value, show that force aid system fails, and is made by controlling switch 2
Pneumatic executive item 1 is in operating position, that is, realizes automatically control.
In addition in the first and second embodiments, the driving of brake pedal 3 uses lever principle, brake pedal 3 to have
It is cut with scissors in the first embodiment for foot-operated pedal panel 31 and the hinge joint 32 being hinged with the holder for connect vehicle body
Contact 32 can connect actuating arm on brake pedal in this way between activation point A and pedal panel 31, and increase drive
The distance of dynamic position A and hinge joint 32, the driving arm of force can be increased, so that the driving of brake pedal 3 is more laborsaving, and
In this second embodiment, activation point A, at this time only need to be on original brake pedal 3 between pedal panel and hinge joint
Activation point A (arc-shaped seat 33) is set, it is easily manufactured.
Above describe the first and second embodiments of the disclosure, as shown in figure 5, in the third embodiment, being carried
The auxiliary braking system of confession equally includes pneumatic executive item 1, and pneumatic executive item 1 has the fixed part 11 for being fixed on vehicle body
With the driving portion 12 for driving brake pedal 3, pneumatic executive item 1 is used for through pipeline 8 and vehicle braking vacuum servo system
The vacuum source 41 of system is connected to so that with operating position and off-position, wherein in operating position, vacuum source 41 compares inoperative
Vacuum degree when position reduces, and driving portion 12 connects with the activation point A transmissions on brake pedal 3 to drive 3 court of brake pedal
It is moved to brake direction, in off-position, such as in Figure 5 and in conjunction with Fig. 2, vacuum source 41 works normally, executive item 1 and drive
Dynamic position A transmissions are freed to allow brake pedal 3 to work normally.The wherein figure of driving portion 12 and brake pedal at operating position
Piece can refer to Fig. 3 in the first and second embodiments.
That is, in the third embodiment, be not required to that individual switch is arranged, and rely on the vacuum boost system of vehicle itself
Pressure source of the vacuum source 41 as pneumatic executive item 1 when causing vacuum degree relatively low, can make in this way, when vacuum source 41 breaks down
It obtains pneumatic executive item 1 to be broken in the equilibrium state of off-position, hence into operating position, braking can be driven automatically
Pedal 3 carries out auxiliary braking, provides the safety of vehicle.
Wherein, similarly with the first and second embodiments, pneumatic executive item 1 includes cylinder barrel 13, is located in the cylinder barrel 13
Piston 14 and the piston rod 15 that is connected on the piston, cylinder barrel 13 be formed as fixed part 11, piston rod 15 is formed as driving portion
12, in operating position, piston rod is stretched out from cylinder barrel 13 to drive brake pedal 3.
Wherein in the third embodiment, it is provided with elastic component 16 in the rodless cavity or rod chamber of pneumatic executive item 1, and
One of rodless cavity and rod chamber are connected to vacuum source 41, another one and atmosphere, in operating position, are connected with vacuum source 41
The indoor pressure reduction of logical chamber, so that elastic component driving piston rod 15 is stretched out to drive brake pedal 3, in inoperative position
Set, the pressure of the chamber being connected to vacuum source 41 makes 16 spring energy storage of elastic component, and piston rod retract with brake pedal 3
Transmission is freed.I.e. under the vacuum boost system normal operating conditions of vehicle, by the pull of vacuum of vacuum source 41, it can ensure
Pneumatic executive item 1 keeps balance, and brake pedal 3 is worked normally.And when the vacuum degree of vacuum source 41 declines, elastic component
16 elastic can restore, so that piston rod 15 stretches out and brake pedal 3 is driven to be braked.As a kind of embodiment, bullet
Property part 16 is the compressed spring being arranged in rodless cavity, and rodless cavity is connected to vacuum source, rod chamber and atmosphere.With first and
Second embodiment similarly, in third embodiment, the type of elastic component, different chamber and vacuum source mode of communicating
Equally there is various deformation, the disclosure not to do excessively repeat herein.
In addition, similarly with the first and second embodiments, check valve is provided between pneumatic executive item 1 and vacuum source 41
5, check valve 5 allows gas flow vacuum source 41.And optionally, arc-shaped seat 33, piston rod 15 are provided at activation point A
End be formed as the arcuate structure being contained in can deviating from arc-shaped seat 33, to adapt to end and the brake pedal of piston rod 15
Between mutual rotation.In addition, with reference to the attached drawing of the first and second embodiments, the activation point A of brake pedal 3 can be located at
Between pedal panel and hinge joint, it can also design at hinged 32 points between activation point A and pedal panel 31.
Wherein in the vehicle that the disclosure provides, including brake pedal 3 and vehicle braking vacuum boost system, vehicle system
It includes vacuum source 41 to employ vacuum boost system, and the pressure source in the first and second embodiment of the disclosure can use the vacuum
Source 41 separately vacuum pump can also realize vacuum.And the vacuum source in third embodiment is then the vacuum servo system
Vacuum source in system.
The preferred embodiment of the disclosure is described in detail above in association with attached drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (8)
1. a kind of auxiliary braking system, which is characterized in that including pneumatic executive item (1), the pneumatic executive item (1), which has, to be used for
The fixed part (11) being fixed on vehicle body and the driving portion (12) for driving brake pedal (3), the pneumatic executive item (1) are used
In being connected to with operating position and inoperative position with the vacuum source (41) of vehicle braking vacuum boost system by pipeline (8)
It sets, in the operating position, the vacuum degree of the vacuum source (41) reduces, the driving portion (12) and the brake pedal (3)
On activation point (A) transmission connect and drive the brake pedal (3) towards brake direction movement, in the inoperative position
It sets, vacuum source (41) normal work, the driving portion (12) and the activation point (A) transmission are freed to allow the system
Dynamic pedal (3) normal work.
2. auxiliary braking system according to claim 1, which is characterized in that the pneumatic executive item (1) includes cylinder barrel
(13), the piston rod (15) for being located at the piston (14) in the cylinder barrel (13) and being connected on the piston, the cylinder barrel (13) are formed
For the fixed part (11), the piston rod (15) is formed as the driving portion (12), in the operating position, the piston rod
It is stretched out from the cylinder barrel (13) to drive the brake pedal (3).
3. auxiliary braking system according to claim 2, which is characterized in that the rodless cavity of the pneumatic executive item (1) or
Elastic component (16) is provided in rod chamber, and one of the rodless cavity and the rod chamber connect with the vacuum source (41)
It is logical, another one and atmosphere, in the operating position, the indoor pressure reduction of chamber being connected to the vacuum source (41), with
So that the elastic component drives the piston rod (15) to stretch out to drive the brake pedal (3), in the off-position, with
The pressure of the chamber of the vacuum source (41) connection makes the elastic component (16) spring energy storage, and the piston rod retract with
It is freed with the brake pedal (3) transmission.
4. auxiliary braking system according to claim 3, which is characterized in that the elastic component (16) is to be arranged in the nothing
Compressed spring in rod cavity, the rodless cavity are connected to the vacuum source, the rod chamber and the atmosphere.
5. auxiliary braking system according to claim 1, which is characterized in that the pneumatic executive item (1) and the vacuum
Check valve (5) is provided between source (41), the check valve (5) allows vacuum source (41) described in gas flow.
6. auxiliary braking system according to claim 2, which is characterized in that be provided with arc at the activation point (A)
Seat (33), the end of the piston rod (15) is formed as the arcuate structure being contained in can deviating from the arc-shaped seat (33).
7. auxiliary braking system according to claim 1, which is characterized in that the brake pedal (3) has pedal panel
(31) and hinge joint (32), the activation point (A) are between the pedal panel and the hinge joint or described hinged
Point is between the activation point (A) and the pedal panel (31).
8. a kind of vehicle, including brake pedal (3) and vehicle braking vacuum boost system, the vehicle braking vacuum servo
System includes vacuum source (41), which is characterized in that further includes auxiliary braking system according to any one of claims 1-7
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721125102.1U CN207644369U (en) | 2017-09-04 | 2017-09-04 | Auxiliary braking system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721125102.1U CN207644369U (en) | 2017-09-04 | 2017-09-04 | Auxiliary braking system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207644369U true CN207644369U (en) | 2018-07-24 |
Family
ID=62886069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721125102.1U Active CN207644369U (en) | 2017-09-04 | 2017-09-04 | Auxiliary braking system and vehicle |
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| Country | Link |
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| CN (1) | CN207644369U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997910A (en) * | 2020-07-28 | 2022-02-01 | 比亚迪股份有限公司 | Brake control system and vehicle with same |
-
2017
- 2017-09-04 CN CN201721125102.1U patent/CN207644369U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113997910A (en) * | 2020-07-28 | 2022-02-01 | 比亚迪股份有限公司 | Brake control system and vehicle with same |
| CN113997910B (en) * | 2020-07-28 | 2023-03-14 | 比亚迪股份有限公司 | Brake control system and vehicle with same |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 102206 Beijing Changping District Shahe town Shayang Road, Niu Niu Wan Village North Patentee after: Beiqi Futian Automobile Co., Ltd. Address before: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Patentee before: Beiqi Futian Automobile Co., Ltd. |